WIP framebuffer issue

We have one big array of characters in scrollback, with lines of
constant width -- there's no reason to have an array of pointers when
offsets will do.

.git-commit-template

@@ -0,0 +1,11 @@
+[section] Imperative-voiced title in less than 50
+
+# Body describes what was done, and why. New obviously-needed features
+# don't necessarily require a why.
+
+# Links to relevant bugs or web pages
+See: Github bug #242
+See: [frobozz blog post](https://jsix.dev/posts/frobozz/)
+
+# Tags and keywords useful for searching
+Tags:

.gitignore

@@ -1,7 +1,10 @@
 .lock*
-build
+/build*
 *.bak
 tags
-.gdbinit
-popcorn.log
-.waf-*
+jsix.log
+*.o
+*.a
+sysroot
+.gdb_history
+.peru

LICENSE.md

@@ -1,132 +1,354 @@
-# Popcorn
+# License
 
-Popcorn itself is released under the terms of the MIT license:
+jsix is (c) 2017-2019 Justin C Miller, and distributed under the terms of the
+Mozilla Public License 2.0.
 
-> Copyright © 2018 Justin C. Miller, http://devjustinian.com <justin@devjustinian.com>
-> 
-> Permission is hereby granted, free of charge, to any person obtaining a copy
-> of this software and associated documentation files (the “Software”), to deal
-> in the Software without restriction, including without limitation the rights
-> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-> copies of the Software, and to permit persons to whom the Software is
-> furnished to do so, subject to the following conditions:
-> 
-> The above copyright notice and this permission notice shall be included in
-> all copies or substantial portions of the Software.
-> 
-> THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-> THE SOFTWARE.
+---
 
-# Included works
+## Mozilla Public License Version 2.0
 
-Popcorn includes and/or is derived from a number of other works, listed here.
+### 1. Definitions
 
-## Catch2
+#### 1.1. "Contributor"
 
-Popcorn uses [Catch2](http://github.com/catchorg/Catch2) for testing. Catch2 is
-released under the terms of the Boost Software license:
+means each individual or legal entity that creates, contributes to the creation
+of, or owns Covered Software.
 
-> Boost Software License - Version 1.0 - August 17th, 2003
-> 
-> Permission is hereby granted, free of charge, to any person or organization
-> obtaining a copy of the software and accompanying documentation covered by
-> this license (the "Software") to use, reproduce, display, distribute,
-> execute, and transmit the Software, and to prepare derivative works of the
-> Software, and to permit third-parties to whom the Software is furnished to
-> do so, all subject to the following:
-> 
-> The copyright notices in the Software and this entire statement, including
-> the above license grant, this restriction and the following disclaimer,
-> must be included in all copies of the Software, in whole or in part, and
-> all derivative works of the Software, unless such copies or derivative
-> works are solely in the form of machine-executable object code generated by
-> a source language processor.
-> 
-> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-> FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-> SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-> FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-> ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-> DEALINGS IN THE SOFTWARE.
+#### 1.2. "Contributor Version"
 
-## Intel EFI Application Toolkit
+means the combination of the Contributions of others (if any) used by a
+Contributor and that particular Contributor's Contribution.
 
-Popcorn's UEFI loader uses code from Intel's EFI Application toolkit. Relevant
-code includes license statements at the top of each file.
+#### 1.3. "Contribution
 
-## Waf
+means Covered Software of a particular Contributor.
 
-Popcorn's build system uses [Waf](https://waf.io/), which claims to be released
-under the BSD license. I could not find its specific license file, so I am
-reproducing a generic 3-clause BSD license (the most restrictive, so as not to
-assume any extra rights that may not actually be granted) for it here:
+#### 1.4. "Covered Software"
 
-> Copyright © 2005-2018 Thomas Nagy
-> 
-> Redistribution and use in source and binary forms, with or without
-> modification, are permitted provided that the following conditions are met:
-> 
-> 1. Redistributions of source code must retain the above copyright notice, this
->    list of conditions and the following disclaimer.
-> 
-> 2. Redistributions in binary form must reproduce the above copyright notice,
->    this list of conditions and the following disclaimer in the documentation
->    and/or other materials provided with the distribution.
-> 
-> 3. Neither the name of the copyright holder nor the names of its contributors
->    may be used to endorse or promote products derived from this software
->    without specific prior written permission.
-> 
-> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-> DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-> FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-> DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-> OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-> OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+means Source Code Form to which the initial Contributor has attached the notice
+in Exhibit A, the Executable Form of such Source Code Form, and Modifications
+of such Source Code Form, in each case including portions thereof.
 
-## GNU-EFI
+#### 1.5. "Incompatible With Secondary Licenses"
 
-Popcorn's UEFI bootloader initially used
-[GNU-EFI](https://gnu-efi.sourceforge.net), and still uses one file (the linker
-script for the bootloader) from that project. GNU-EFI claims to be released
-under the BSD license. Again, I could not find its specific license file, so I
-am reproducing a generic 3-clause BSD license (the most restrictive, so as not
-to assume any extra rights that may not actually be granted) for it here:
+means
 
-> Copyright © Nigel Croxon
-> 
-> Redistribution and use in source and binary forms, with or without
-> modification, are permitted provided that the following conditions are met:
-> 
-> 1. Redistributions of source code must retain the above copyright notice, this
->    list of conditions and the following disclaimer.
-> 
-> 2. Redistributions in binary form must reproduce the above copyright notice,
->    this list of conditions and the following disclaimer in the documentation
->    and/or other materials provided with the distribution.
-> 
-> 3. Neither the name of the copyright holder nor the names of its contributors
->    may be used to endorse or promote products derived from this software
->    without specific prior written permission.
-> 
-> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-> DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-> FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-> DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-> OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-> OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+* **(a)** that the initial Contributor has attached the notice described in
+  Exhibit B to the Covered Software; or
+* **(b)** that the Covered Software was made available under the terms of
+  version 1.1 or earlier of the License, but not also under the terms of a
+  Secondary License.
+
+#### 1.6. "Executable Form"
+
+means any form of the work other than Source Code Form.
+
+#### 1.7. "Larger Work"
+
+means a work that combines Covered Software with other material, in a separate
+file or files, that is not Covered Software.
+
+#### 1.8. "License"
+
+means this document.
+
+#### 1.9. "Licensable"
+
+means having the right to grant, to the maximum extent possible, whether at the
+time of the initial grant or subsequently, any and all of the rights conveyed
+by this License.
+
+#### 1.10. "Modifications"
+
+means any of the following:
+
+* **(a)** any file in Source Code Form that results from an addition to,
+  deletion from, or modification of the contents of Covered Software; or
+* **(b)** any new file in Source Code Form that contains any Covered Software.
+
+#### 1.11. "Patent Claims" of a Contributor
+
+means any patent claim(s), including without limitation, method, process, and
+apparatus claims, in any patent Licensable by such Contributor that would be
+infringed, but for the grant of the License, by the making, using, selling,
+offering for sale, having made, import, or transfer of either its Contributions
+or its Contributor Version.
+
+#### 1.12. "Secondary License"
+
+means either the GNU General Public License, Version 2.0, the GNU Lesser
+General Public License, Version 2.1, the GNU Affero General Public License,
+Version 3.0, or any later versions of those licenses.
+
+#### 1.13. "Source Code Form"
+
+means the form of the work preferred for making modifications.
+
+#### 1.14. "You" (or "Your")
+
+means an individual or a legal entity exercising rights under this License. For
+legal entities, "You" includes any entity that controls, is controlled by, or
+is under common control with You. For purposes of this definition, "control"
+means **(a)** the power, direct or indirect, to cause the direction or
+management of such entity, whether by contract or otherwise, or **(b)**
+ownership of more than fifty percent (50%) of the outstanding shares or
+beneficial ownership of such entity.
+
+
+### 2. License Grants and Conditions
+
+#### 2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free, non-exclusive
+license:
+
+* **(a)** under intellectual property rights (other than patent or trademark)
+  Licensable by such Contributor to use, reproduce, make available, modify,
+  display, perform, distribute, and otherwise exploit its Contributions, either
+  on an unmodified basis, with Modifications, or as part of a Larger Work; and
+* **(b)** under Patent Claims of such Contributor to make, use, sell, offer for
+  sale, have made, import, and otherwise transfer either its Contributions or
+  its Contributor Version.
+
+#### 2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution become
+effective for each Contribution on the date the Contributor first distributes
+such Contribution.
+
+#### 2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under this
+License. No additional rights or licenses will be implied from the distribution
+or licensing of Covered Software under this License.  Notwithstanding Section
+2.1(b) above, no patent license is granted by a Contributor:
+
+* **(a)** for any code that a Contributor has removed from Covered Software; or
+* **(b)** for infringements caused by: **(i)** Your and any other third party's
+  modifications of Covered Software, or **(ii)** the combination of its
+  Contributions with other software (except as part of its Contributor
+  Version); or
+* **(c)** under Patent Claims infringed by Covered Software in the absence of
+  its Contributions.
+
+This License does not grant any rights in the trademarks, service marks, or
+logos of any Contributor (except as may be necessary to comply with the notice
+requirements in Section 3.4).
+
+#### 2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to distribute
+the Covered Software under a subsequent version of this License (see Section
+10.2) or under the terms of a Secondary License (if permitted under the terms
+of Section 3.3).
+
+#### 2.5. Representation
+
+Each Contributor represents that the Contributor believes its Contributions are
+its original creation(s) or it has sufficient rights to grant the rights to its
+Contributions conveyed by this License.
+
+#### 2.6. Fair Use
+
+This License is not intended to limit any rights You have under applicable
+copyright doctrines of fair use, fair dealing, or other equivalents.
+
+#### 2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
+Section 2.1.
+
+
+### 3. Responsibilities
+
+#### 3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under the
+terms of this License. You must inform recipients that the Source Code Form of
+the Covered Software is governed by the terms of this License, and how they can
+obtain a copy of this License. You may not attempt to alter or restrict the
+recipients' rights in the Source Code Form.
+
+#### 3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+* **(a)** such Covered Software must also be made available in Source Code
+  Form, as described in Section 3.1, and You must inform recipients of the
+  Executable Form how they can obtain a copy of such Source Code Form by
+  reasonable means in a timely manner, at a charge no more than the cost of
+  distribution to the recipient; and
+* **(b)** You may distribute such Executable Form under the terms of this
+  License, or sublicense it under different terms, provided that the license
+  for the Executable Form does not attempt to limit or alter the recipients'
+  rights in the Source Code Form under this License.
+
+#### 3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for the
+Covered Software. If the Larger Work is a combination of Covered Software with
+a work governed by one or more Secondary Licenses, and the Covered Software is
+not Incompatible With Secondary Licenses, this License permits You to
+additionally distribute such Covered Software under the terms of such Secondary
+License(s), so that the recipient of the Larger Work may, at their option,
+further distribute the Covered Software under the terms of either this License
+or such Secondary License(s).
+
+#### 3.4. Notices
+
+You may not remove or alter the substance of any license notices (including
+copyright notices, patent notices, disclaimers of warranty, or limitations of
+liability) contained within the Source Code Form of the Covered Software,
+except that You may alter any license notices to the extent required to remedy
+known factual inaccuracies.
+
+#### 3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support, indemnity
+or liability obligations to one or more recipients of Covered Software.
+However, You may do so only on Your own behalf, and not on behalf of any
+Contributor. You must make it absolutely clear that any such warranty, support,
+indemnity, or liability obligation is offered by You alone, and You hereby
+agree to indemnify every Contributor for any liability incurred by such
+Contributor as a result of warranty, support, indemnity or liability terms You
+offer. You may include additional disclaimers of warranty and limitations of
+liability specific to any jurisdiction.
+
+
+### 4. Inability to Comply Due to Statute or Regulation
+
+If it is impossible for You to comply with any of the terms of this License
+with respect to some or all of the Covered Software due to statute, judicial
+order, or regulation then You must: **(a)** comply with the terms of this
+License to the maximum extent possible; and **(b)** describe the limitations
+and the code they affect. Such description must be placed in a text file
+included with all distributions of the Covered Software under this License.
+Except to the extent prohibited by statute or regulation, such description must
+be sufficiently detailed for a recipient of ordinary skill to be able to
+understand it.
+
+
+### 5. Termination
+
+**5.1.** The rights granted under this License will terminate automatically if
+You fail to comply with any of its terms. However, if You become compliant,
+then the rights granted under this License from a particular Contributor are
+reinstated **(a)** provisionally, unless and until such Contributor explicitly
+and finally terminates Your grants, and **(b)** on an ongoing basis, if such
+Contributor fails to notify You of the non-compliance by some reasonable means
+prior to 60 days after You have come back into compliance. Moreover, Your
+grants from a particular Contributor are reinstated on an ongoing basis if such
+Contributor notifies You of the non-compliance by some reasonable means, this
+is the first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after Your
+receipt of the notice.
+
+**5.2.** If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions, counter-claims, and
+cross-claims) alleging that a Contributor Version directly or indirectly
+infringes any patent, then the rights granted to You by any and all
+Contributors for the Covered Software under Section 2.1 of this License shall
+terminate.
+
+**5.3.** In the event of termination under Sections 5.1 or 5.2 above, all end
+user license agreements (excluding distributors and resellers) which have been
+validly granted by You or Your distributors under this License prior to
+termination shall survive termination.
+
+
+### 6. Disclaimer of Warranty
+
+> Covered Software is provided under this License on an "as is" basis, without
+> warranty of any kind, either expressed, implied, or statutory, including,
+> without limitation, warranties that the Covered Software is free of defects,
+> merchantable, fit for a particular purpose or non-infringing. The entire risk
+> as to the quality and performance of the Covered Software is with You.
+> Should any Covered Software prove defective in any respect, You (not any
+> Contributor) assume the cost of any necessary servicing, repair, or
+> correction. This disclaimer of warranty constitutes an essential part of this
+> License. No use of any Covered Software is authorized under this License
+> except under this disclaimer.
+
+### 7. Limitation of Liability
+
+> Under no circumstances and under no legal theory, whether tort (including
+> negligence), contract, or otherwise, shall any Contributor, or anyone who
+> distributes Covered Software as permitted above, be liable to You for any
+> direct, indirect, special, incidental, or consequential damages of any
+> character including, without limitation, damages for lost profits, loss of
+> goodwill, work stoppage, computer failure or malfunction, or any and all
+> other commercial damages or losses, even if such party shall have been
+> informed of the possibility of such damages. This limitation of liability
+> shall not apply to liability for death or personal injury resulting from such
+> party's negligence to the extent applicable law prohibits such limitation.
+> Some jurisdictions do not allow the exclusion or limitation of incidental or
+> consequential damages, so this exclusion and limitation may not apply to You.
+
+
+### 8. Litigation
+
+Any litigation relating to this License may be brought only in the courts of a
+jurisdiction where the defendant maintains its principal place of business and
+such litigation shall be governed by laws of that jurisdiction, without
+reference to its conflict-of-law provisions.  Nothing in this Section shall
+prevent a party's ability to bring cross-claims or counter-claims.
+
+
+### 9. Miscellaneous
+
+This License represents the complete agreement concerning the subject matter
+hereof. If any provision of this License is held to be unenforceable, such
+provision shall be reformed only to the extent necessary to make it
+enforceable. Any law or regulation which provides that the language of a
+contract shall be construed against the drafter shall not be used to construe
+this License against a Contributor.
+
+
+### 10. Versions of the License
+
+#### 10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section 10.3,
+no one other than the license steward has the right to modify or publish new
+versions of this License. Each version will be given a distinguishing version
+number.
+
+#### 10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version of the
+License under which You originally received the Covered Software, or under the
+terms of any subsequent version published by the license steward.
+
+#### 10.3. Modified Versions
+
+If you create software not governed by this License, and you want to create a
+new license for such software, you may create and use a modified version of
+this License if you rename the license and remove any references to the name of
+the license steward (except to note that such modified license differs from
+this License).
+
+#### 10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the notice
+described in Exhibit B of this License must be attached.
+
+### Exhibit A - Source Code Form License Notice
+
+	This Source Code Form is subject to the terms of the Mozilla Public
+	License, v. 2.0. If a copy of the MPL was not distributed with this file,
+	You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular file, then
+You may include the notice in a location (such as a LICENSE file in a relevant
+directory) where a recipient would be likely to look for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+### Exhibit B - "Incompatible With Secondary Licenses" Notice
+
+	This Source Code Form is "Incompatible With Secondary Licenses", as defined
+	by the Mozilla Public License, v. 2.0.
 

NOTES.md

@@ -2,25 +2,37 @@
 
 ## TODO
 
-- Better page-allocation model
+- Paging manager
+  - Copy-on-write pages
+  - Better page-allocation model?
 - Allow for more than one IOAPIC in ACPI module
   - The objects get created, but GSI lookup only uses the one at index 0
-- Slab allocator for kernel structures
 - mark kernel memory pages global
-- lock `memory_manager` and `page_manager` structures
 - Serial out based on circular/bip biffer and interrupts, not spinning on
   `write_ready()`
 - Split out more code into kutil for testing
 - AHCI / MSI interrupts on Vbox break?
 - FXSAVE to save XMM registers.
   - optimization using #NM (0x7) to detect SSE usage
-
-
+- Clean up of process memory maps
+- Better stack tracer
+- Bootloader rewrite
+  - C++ and sharing library code for ELF, initrd, etc
+  - Parse initrd and pre-load certain ELF images, eg the process loader process?
+  - Do initial memory bootstrap?
+- Calling global ctors
 - Device Tree
   - Actual serial driver
   - Disk driver
     - File system
-- Memory map swapping
-  - Multiprocessing
-    - Processes in Ring 3
-- Stack tracer
+- Multiprocessing
+  - Fast syscalls using syscall/sysret
+
+### Build
+
+- Clean up build generator and its templates
+  - More robust objects to represent modules & targets to pass to templates
+  - Read project setup from a simple JSON/TOML/etc
+  - Better compartmentalizing when doing template inheritance
+- Move to LLD as sysroot linker
+

README.md

@@ -1,7 +1,9 @@
-# popcorn: A toy OS kernel
+![jsix](assets/jsix.svg)
 
-**popcorn** is the kernel for the hobby OS that I am currently building. It's
-far from finished, or even being usable. Instead, it's a sandbox for me to play
+# jsix: A hobby operating system
+
+**jsix** is the hobby operating system that I am currently building. It's far
+from finished, or even being usable. Instead, it's a sandbox for me to play
 with kernel-level code and explore architectures.
 
 The design goals of the project are:
@@ -9,7 +11,8 @@ The design goals of the project are:
 * Modernity - I'm not interested in designing for legacy systems, or running on
   all hardware out there. My target is only 64 bit architecutres, and modern
   commodity hardware. Currently that means x64 systems with Nehalem or newer
-  CPUs and UEFI firmware. Eventually I'd like to work on an AArch64 port,
+  CPUs and UEFI firmware. (See [this list][cpu_features] for the currently
+  required CPU features.) Eventually I'd like to work on an AArch64 port,
   partly to force myself to factor out the architecture-dependent pieces of the
   code base.
 
@@ -17,24 +20,63 @@ The design goals of the project are:
   processes as possible, in the microkernel fashion. A sub-goal of this is to
   explore where the bottlenecks of such a microkernel are now, and whether
   eschewing legacy hardware will let me design a system that's less bogged down
-  by the traditional microkernel problems. Given that there are no processes
-  yet, the kernel is monolithic by default.
+  by the traditional microkernel problems.
 
 * Exploration - I'm really mostly doing this to have fun learning and exploring
   modern OS development. Modular design may be tossed out (hopefully
   temporarily) in some places to allow me to play around with the related
   hardware.
 
+A note on the name: This kernel was originally named Popcorn, but I have since
+discovered that the Popcorn Linux project is also developing a kernel with that
+name, started around the same time as this project. So I've renamed this kernel
+jsix (Always styled _jsix_ or `j6`, never capitalized) as an homage to L4, xv6,
+and my wonderful wife.
+
+[cpu_features]: https://github.com/justinian/jsix/blob/master/src/libraries/cpu/include/cpu/features.inc
+
 ## Building
 
-Popcorn uses the `waf` build tool, which is included in the repo. The other
-requirements are:
+jsix uses the [Ninja][] build tool, and generates the build files for it with a
+custom tool called [Bonnibel][]. Bonnibel can be installed with [Cargo][], or
+downloaded as a prebuilt binary from its Github repository.
 
-* python (to run waf)
+[Ninja]:    https://ninja-build.org
+[Bonnibel]: https://github.com/justinian/bonnibel_rs
+[Cargo]:    https://crates.io/crates/bonnibel
+
+Requrirements:
+
+* bonnibel
+* ninja
 * clang
 * nasm
+* mtools
+* curl for downloading the toolchain
+
+### Setting up the cross toolchain
+
+Running `pb sync` will download and unpack the toolchain into `sysroot`. 
+
+#### Compiling the toolchain yourself
+
+If you have `clang` and `curl` installed, runing the `scripts/build_sysroot.sh`
+script will download and build a LLVM toolchain configured for building jsix
+host binaries.
+
+### Building and running jsix
+
+Once the toolchain has been set up, running Bonnibel's `pb init` command will
+set up the build configuration, and `pb build` will actually run the build.  If
+you have `qemu-system-x86_64` installed, the `qemu.sh` script will to run jsix
+in QEMU `-nographic` mode.
+
+I personally run this either from a real debian amd64 testing/buster machine or
+a windows WSL debian testing/buster installation. The following should be
+enough to set up such a system to build the kernel:
+
+    sudo apt install qemu-system-x86 nasm clang-10 mtools curl ninja-build
+    sudo update-alternatives /usr/bin/clang clang /usr/bin/clang-10 1000
+    sudo update-alternatives /usr/bin/clang++ clang++ /usr/bin/clang++-10 1000
+	curl -L -o pb https://github.com/justinian/bonnibel_rs/releases/download/v2.3.0/pb-linux-amd64 && chmod a+x pb
 
-After cloning, run `waf configure`. Then you can run `waf build` to build the
-project, and `waf test` to run the tests. A floppy disk image will be built in
-`build/popcorn.img`. If you have `qemu-system-x86_64` installed, then you can
-run `waf qemu` to run it in `-nographic` mode.

assets/debugging/jsix.elf-gdb.py

@@ -0,0 +1,63 @@
+import gdb
+
+class PrintStackCommand(gdb.Command):
+    def __init__(self):
+        super().__init__("j6stack", gdb.COMMAND_DATA)
+
+    def invoke(self, arg, from_tty):
+        args = gdb.string_to_argv(arg)
+
+        base = "$rsp"
+        if len(args) > 0:
+            base = args[0]
+
+        depth = 22
+        if len(args) > 1:
+            depth = int(args[1])
+
+        for i in range(depth-1, -1, -1):
+            try:
+                offset = i * 8
+                base_addr = gdb.parse_and_eval(base)
+                value = gdb.parse_and_eval(f"*(uint64_t*)({base} + {offset})")
+                print("{:016x} (+{:04x}): {:016x}".format(int(base_addr) + offset, offset, int(value)))
+            except Exception as e:
+                print(e)
+                continue
+
+
+class PrintBacktraceCommand(gdb.Command):
+    def __init__(self):
+        super().__init__("j6bt", gdb.COMMAND_DATA)
+
+    def invoke(self, arg, from_tty):
+        args = gdb.string_to_argv(arg)
+
+        depth = 30
+        if len(args) > 0:
+            depth = int(args[0])
+
+        frame = "$rbp"
+        if len(args) > 1:
+            frame = args[1]
+
+        for i in range(depth-1, -1, -1):
+            ret = gdb.parse_and_eval(f"*(uint64_t*)({frame} + 8)")
+            frame = gdb.parse_and_eval(f"*(uint64_t*)({frame})")
+
+            name = ""
+            block = gdb.block_for_pc(int(ret))
+            if block:
+                name = block.function or ""
+
+            print("{:016x} {}".format(int(ret), name))
+
+            if frame == 0 or ret == 0:
+                return
+
+
+PrintStackCommand()
+PrintBacktraceCommand()
+
+gdb.execute("target remote :1234")
+gdb.execute("display/i $rip")

assets/initrd.toml

@@ -0,0 +1,28 @@
+# This is the manifest for the initial ramdisk, read by the `makerd` tool.
+# The contents should be a table array of files to add to the ramdistk:
+#
+#  [[files]]
+#  dest = "foo.bar"             # Name of the file in the ramdisk
+#  source = "build/foo/foo.bar" # Location of the file from the project root
+#  executable = true            # Optional, default false. Whether this is an
+#                               # initial application for the kernel to execute
+#                               # on startup
+
+[[files]]
+dest = "screenfont.psf"
+source = "../assets/fonts/tamsyn8x16r.psf"
+
+[[files]]
+dest = "symbol_table.dat"
+source = "symbol_table.dat"
+symbols = true
+
+[[files]]
+dest = "nulldrv1"
+source = "user/nulldrv"
+executable = true
+
+[[files]]
+dest = "nulldrv2"
+source = "user/nulldrv"
+executable = true

assets/jsix.svg

@@ -0,0 +1 @@
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external/uefi/boot_services.h

@@ -0,0 +1,103 @@
+#pragma once
+#ifndef _uefi_boot_services_h_
+#define _uefi_boot_services_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+#include <uefi/tables.h>
+#include <uefi/types.h>
+
+namespace uefi {
+namespace bs_impl {
+	using allocate_pages = status (*)(allocate_type, memory_type, size_t, void**);
+	using free_pages = status (*)(void*, size_t);
+	using get_memory_map = status (*)(size_t*, memory_descriptor*, size_t*, size_t*, uint32_t*);
+	using allocate_pool = status (*)(memory_type, uint64_t, void**);
+	using free_pool = status (*)(void*);
+	using handle_protocol = status (*)(handle, const guid*, void**);
+	using create_event = status (*)(evt, tpl, event_notify, void*, event*);
+	using exit_boot_services = status (*)(handle, size_t);
+	using locate_protocol = status (*)(const guid*, void*, void**);
+	using copy_mem = void (*)(void*, void*, size_t);
+	using set_mem = void (*)(void*, uint64_t, uint8_t);
+}
+
+struct boot_services {
+	static constexpr uint64_t signature = 0x56524553544f4f42ull;
+
+	table_header header;
+
+	// Task Priority Level management
+	void *raise_tpl;
+	void *restore_tpl;
+
+	// Memory Services
+	bs_impl::allocate_pages allocate_pages;
+	bs_impl::free_pages free_pages;
+	bs_impl::get_memory_map get_memory_map;
+	bs_impl::allocate_pool allocate_pool;
+	bs_impl::free_pool free_pool;
+
+	// Event & Timer Services
+	bs_impl::create_event create_event;
+	void *set_timer;
+	void *wait_for_event;
+	void *signal_event;
+	void *close_event;
+	void *check_event;
+
+	// Protocol Handler Services
+	void *install_protocol_interface;
+	void *reinstall_protocol_interface;
+	void *uninstall_protocol_interface;
+	bs_impl::handle_protocol handle_protocol;
+	void *_reserved;
+	void *register_protocol_notify;
+	void *locate_handle;
+	void *locate_device_path;
+	void *install_configuration_table;
+
+	// Image Services
+	void *load_image;
+	void *start_image;
+	void *exit;
+	void *unload_image;
+	bs_impl::exit_boot_services exit_boot_services;
+
+	// Miscellaneous Services
+	void *get_next_monotonic_count;
+	void *stall;
+	void *set_watchdog_timer;
+
+	// DriverSupport Services
+	void *connect_controller;
+	void *disconnect_controller;
+
+	// Open and Close Protocol Services
+	void *open_protocol;
+	void *close_protocol;
+	void *open_protocol_information;
+
+	// Library Services
+	void *protocols_per_handle;
+	void *locate_handle_buffer;
+	bs_impl::locate_protocol locate_protocol;
+	void *install_multiple_protocol_interfaces;
+	void *uninstall_multiple_protocol_interfaces;
+
+	// 32-bit CRC Services
+	void *calculate_crc32;
+
+	// Miscellaneous Services
+	bs_impl::copy_mem copy_mem;
+	bs_impl::set_mem set_mem;
+	void *create_event_ex;
+};
+
+} // namespace uefi
+
+#endif

external/uefi/errors.inc

@@ -0,0 +1,39 @@
+STATUS_WARNING( warn_unknown_glyph,   1)
+STATUS_WARNING( warn_delete_failure,  2)
+STATUS_WARNING( warn_write_failure,   3)
+STATUS_WARNING( warn_buffer_too_small,4)
+STATUS_WARNING( warn_stale_data,      5)
+STATUS_WARNING( warn_file_system,     6)
+
+STATUS_ERROR( load_error,             1)
+STATUS_ERROR( invalid_parameter,      2)
+STATUS_ERROR( unsupported,            3)
+STATUS_ERROR( bad_buffer_size,        4)
+STATUS_ERROR( buffer_too_small,       5)
+STATUS_ERROR( not_ready,              6)
+STATUS_ERROR( device_error,           7)
+STATUS_ERROR( write_protected,        8)
+STATUS_ERROR( out_of_resources,       9)
+STATUS_ERROR( volume_corrupted,       10)
+STATUS_ERROR( volume_full,            11)
+STATUS_ERROR( no_media,               12)
+STATUS_ERROR( media_changed,          13)
+STATUS_ERROR( not_found,              14)
+STATUS_ERROR( access_denied,          15)
+STATUS_ERROR( no_response,            16)
+STATUS_ERROR( no_mapping,             17)
+STATUS_ERROR( timeout,                18)
+STATUS_ERROR( not_started,            19)
+STATUS_ERROR( already_started,        20)
+STATUS_ERROR( aborted,                21)
+STATUS_ERROR( icmp_error,             22)
+STATUS_ERROR( tftp_error,             23)
+STATUS_ERROR( protocol_error,         24)
+STATUS_ERROR( incompatible_version,   25)
+STATUS_ERROR( security_violation,     26)
+STATUS_ERROR( crc_error,              27)
+STATUS_ERROR( end_of_media,           28)
+STATUS_ERROR( end_of_file,            31)
+STATUS_ERROR( invalid_language,       32)
+STATUS_ERROR( compromised_data,       33)
+STATUS_ERROR( http_error,             35)

external/uefi/graphics.h

@@ -0,0 +1,92 @@
+#pragma once
+#ifndef _uefi_graphics_h_
+#define _uefi_graphics_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+#include <uefi/types.h>
+
+namespace uefi {
+
+struct text_output_mode
+{
+	int32_t max_mode;
+	int32_t mode;
+	int32_t attribute;
+	int32_t cursor_column;
+	int32_t cursor_row;
+	bool cursor_visible;
+};
+
+struct pixel_bitmask
+{
+	uint32_t red_mask;
+	uint32_t green_mask;
+	uint32_t blue_mask;
+	uint32_t reserved_mask;
+};
+
+enum class pixel_format
+{
+	rgb8,
+	bgr8,
+	bitmask,
+	blt_only
+};
+
+struct graphics_output_mode_info
+{
+	uint32_t version;
+	uint32_t horizontal_resolution;
+	uint32_t vertical_resolution;
+	pixel_format pixel_format;
+	pixel_bitmask pixel_information;
+	uint32_t pixels_per_scanline;
+};
+
+struct graphics_output_mode
+{
+	uint32_t max_mode;
+	uint32_t mode;
+	graphics_output_mode_info *info;
+	uint64_t size_of_info;
+	uintptr_t frame_buffer_base;
+	uint64_t frame_buffer_size;
+};
+
+enum class attribute : uint64_t
+{
+	black,
+	blue,
+	green,
+	cyan,
+	red,
+	magenta,
+	brown,
+	light_gray,
+	dark_gray,
+	light_blue,
+	light_green,
+	light_cyan,
+	light_red,
+	light_magenta,
+	yellow,
+	white,
+
+	background_black      = 0x00,
+	background_blue       = 0x10,
+	background_green      = 0x20,
+	background_cyan       = 0x30,
+	background_red        = 0x40,
+	background_magenta    = 0x50,
+	background_brown      = 0x60,
+	background_light_gray = 0x70,
+};
+
+} // namespace uefi
+
+#endif

external/uefi/guid.h

@@ -0,0 +1,29 @@
+#pragma once
+#ifndef _uefi_guid_h_
+#define _uefi_guid_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+
+namespace uefi {
+
+struct guid
+{
+	uint32_t data1;
+	uint16_t data2;
+	uint16_t data3;
+	uint8_t data4[8];
+
+	inline bool operator==(const guid &other) const {
+		return reinterpret_cast<const uint64_t*>(this)[0] == reinterpret_cast<const uint64_t*>(&other)[0]
+			&& reinterpret_cast<const uint64_t*>(this)[1] == reinterpret_cast<const uint64_t*>(&other)[1];
+	}
+};
+
+} // namespace uefi
+
+#endif

external/uefi/networking.h

@@ -0,0 +1,390 @@
+#pragma once
+#ifndef _uefi_networking_h_
+#define _uefi_networking_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+#include <uefi/types.h>
+
+namespace uefi {
+
+//
+// IPv4 definitions
+//
+struct ipv4_address
+{
+	uint8_t addr[4];
+};
+
+//
+// IPv6 definitions
+//
+struct ipv6_address
+{
+	uint8_t addr[16];
+};
+
+struct ip6_address_info
+{
+    ipv6_address address;
+    uint8_t prefix_length;
+};
+
+struct ip6_route_table
+{
+    ipv6_address gateway;
+    ipv6_address destination;
+    uint8_t prefix_length;
+};
+
+enum class ip6_neighbor_state : int {
+    incomplete,
+    reachable,
+    stale,
+    delay,
+    probe,
+}
+
+struct ip6_neighbor_cache
+{
+    ipv6_address neighbor;
+    mac_address link_address;
+    ip6_neighbor_state state;
+};
+
+enum class icmpv6_type : uint8_t
+{
+    dest_unreachable = 0x1,
+    packet_too_big = 0x2,
+    time_exceeded = 0x3,
+    parameter_problem = 0x4,
+    echo_request = 0x80,
+    echo_reply = 0x81,
+    listener_query = 0x82,
+    listener_report = 0x83,
+    listener_done = 0x84,
+    router_solicit = 0x85,
+    router_advertise = 0x86,
+    neighbor_solicit = 0x87,
+    neighbor_advertise = 0x88,
+    redirect = 0x89,
+    listener_report_2 = 0x8f,
+};
+
+enum class icmpv6_code : uint8_t
+{
+    // codes for icmpv6_type::dest_unreachable
+    no_route_to_dest = 0x0,
+    comm_prohibited = 0x1,
+    beyond_scope = 0x2,
+    addr_unreachable = 0x3,
+    port_unreachable = 0x4,
+    source_addr_failed = 0x5,
+    route_rejected = 0x6,
+
+    // codes for icmpv6_type::time_exceeded
+    timeout_hop_limit = 0x0,
+    timeout_reassemble = 0x1,
+
+    // codes for icmpv6_type::parameter_problem
+    erroneous_header = 0x0,
+    unrecognize_next_hdr = 0x1,
+    unrecognize_option = 0x2,
+};
+
+struct ip6_icmp_type
+{
+    icmpv6_type type;
+    icmpv6_code code;
+};
+
+struct ip6_config_data
+{
+    uint8_t default_protocol;
+    bool accept_any_protocol;
+    bool accept_icmp_errors;
+    bool accept_promiscuous;
+    ipv6_address destination_address;
+    ipv6_address station_address;
+    uint8_t traffic_class;
+    uint8_t hop_limit;
+    uint32_t flow_label;
+    uint32_t receive_timeout;
+    uint32_t transmit_timeout;
+};
+
+struct ip6_mode_data
+{
+    bool is_started;
+    uint32_t max_packet_size;
+    ip6_config_data config_data;
+    bool is_configured;
+    uint32_t address_count;
+    ip6_address_info * address_list;
+    uint32_t group_count;
+    ipv6_address * group_table;
+    uint32_t route_count;
+    ip6_route_table * route_table;
+    uint32_t neighbor_count;
+    ip6_neighbor_cache * neighbor_cache;
+    uint32_t prefix_count;
+    ip6_address_info * prefix_table;
+    uint32_t icmp_type_count;
+     * icmp_type_list;
+};
+
+struct ip6_header
+{
+    uint8_t traffic_class_h : 4;
+    uint8_t version : 4;
+    uint8_t flow_label_h : 4;
+    uint8_t traffic_class_l : 4;
+    uint16_t flow_label_l;
+    uint16_t payload_length;
+    uint8_t next_header;
+    uint8_t hop_limit;
+    ipv6_address source_address;
+    ipv6_address destination_address;
+} __attribute__ ((packed));
+
+struct ip6_fragment_data
+{
+    uint32_t fragment_length;
+    void *fragment_buffer;
+};
+
+struct ip6_override_data
+{
+    uint8_t protocol;
+    uint8_t hop_limit;
+    uint32_t flow_label;
+};
+
+struct ip6_receive_data
+{
+    time time_stamp;
+    event recycle_signal;
+    uint32_t header_length;
+    ip6_header *header;
+    uint32_t data_length;
+    uint32_t fragment_count;
+    ip6_fragment_data fragment_table[1];
+};
+
+struct ip6_transmit_data
+{
+    ipv6_address destination_address;
+    ip6_override_data *override_data;
+
+    uint32_t ext_hdrs_length;
+    void *ext_hdrs;
+    uint8_t next_header;
+    uint32_t data_length;
+    uint32_t fragment_count;
+    ip6_fragment_data fragment_table[1];
+};
+
+struct ip6_completion_token
+{
+    event event;
+    status status;
+    union {
+        ip6_receive_data *rx_data;
+        ip6_transmit_data *tx_data;
+    } packet;
+};
+
+enum class ip6_config_data_type : int
+{
+    interface_info,
+    alt_interface_id,
+    policy,
+    dup_addr_detect_transmits,
+    manual_address,
+    gateway,
+    dns_server,
+    maximum
+};
+
+struct ip6_config_interface_info
+{
+    wchar_t name[32];
+    uint8_t if_type;
+    uint32_t hw_address_size;
+    mac_address hw_address;
+    uint32_t address_info_count;
+    ip6_address_info *address_info;
+    uint32_t route_count;
+    ip6_route_table *route_table;
+};
+
+struct ip6_config_interface_id
+{
+    uint8_t id[8];
+};
+
+enum class ip6_config_policy : int
+{
+    manual,
+    automatic
+};
+
+struct ip6_config_dup_addr_detect_transmits
+{
+    uint32_t dup_addr_detect_transmits;
+};
+
+struct ip6_config_manual_address
+{
+    ipv6_address address;
+    bool is_anycast;
+    uint8_t prefix_length;
+};
+
+//
+// IP definitions
+//
+union ip_address
+{
+	uint8_t addr[4];
+	ipv4_address v4;
+	ipv6_address v6;
+};
+
+//
+// HTTP definitions
+//
+struct httpv4_access_point
+{
+	bool use_default_address;
+	ipv4_address local_address;
+	ipv4_address local_subnet;
+	uint16_t local_port;
+};
+
+struct httpv6_access_point
+{
+	ipv6_address local_address;
+	uint16_t local_port;
+};
+
+enum class http_version : int {
+	v10,
+	v11,
+	unsupported,
+};
+
+struct http_config_data
+{
+	http_version http_version;
+	uint32_t time_out_millisec;
+	bool local_address_is_ipv6;
+	union {
+		httpv4_access_point *ipv4_node;
+		httpv6_access_point *ipv6_node;
+	} access_point;
+};
+
+enum class http_method : int {
+	get,
+	post,
+	patch,
+	options,
+	connect,
+	head,
+	put,
+	delete_,
+	trace,
+};
+
+struct http_request_data
+{
+	http_method method;
+	wchar_t *url;
+};
+
+enum class http_status_code : int {
+	unsupported,
+	continue_,
+	switching_protocols,
+	ok,
+	created,
+	accepted,
+	non_authoritative_information,
+	no_content,
+	reset_content,
+	partial_content,
+	multiple_choices,
+	moved_permanently,
+	found,
+	see_other,
+	not_modified,
+	use_proxy,
+	temporary_redirect,
+	bad_request,
+	unauthorized,
+	payment_required,
+	forbidden,
+	not_found,
+	method_not_allowed,
+	not_acceptable,
+	proxy_authentication_required,
+	request_time_out,
+	conflict,
+	gone,
+	length_required,
+	precondition_failed,
+	request_entity_too_large,
+	request_uri_too_large,
+	unsupported_media_type,
+	requested_range_not_satisfied,
+	expectation_failed,
+	internal_server_error,
+	not_implemented,
+	bad_gateway,
+	service_unavailable,
+	gateway_timeout,
+	http_version_not_supported,
+	permanent_redirect,  // I hate your decisions, uefi.
+};
+
+struct http_response_data
+{
+	http_status_code status_code;
+};
+
+struct http_header
+{
+	char *field_name;
+	char *field_value;
+};
+
+struct http_message
+{
+	union {
+		http_request_data *request;
+		http_response_data *response;
+	} data;
+
+	size_t header_count;
+	http_header *headers;
+
+	size_t body_length;
+	void *body;
+};
+
+struct http_token
+{
+	event event;
+	status status;
+	http_message *message;
+};
+
+
+} // namespace uefi
+
+#endif

external/uefi/protos/device_path.h

@@ -0,0 +1,31 @@
+#pragma once
+#ifndef _uefi_protos_device_path_h_
+#define _uefi_protos_device_path_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+
+namespace uefi {
+namespace protos {
+struct device_path;
+
+struct device_path
+{
+    static constexpr uefi::guid guid{ 0x09576e91,0x6d3f,0x11d2,{0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    uint8_t type;
+    uint8_t sub_type;
+    uint16_t length;
+
+protected:
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_device_path_h_

external/uefi/protos/file.h

@@ -0,0 +1,126 @@
+#pragma once
+#ifndef _uefi_protos_file_h_
+#define _uefi_protos_file_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+
+namespace uefi {
+namespace protos {
+struct file;
+
+struct file
+{
+
+
+    inline uefi::status open(file ** new_handle, const wchar_t * file_name, file_mode open_mode, file_attr attributes) {
+        return _open(this, new_handle, file_name, open_mode, attributes);
+    }
+
+    inline uefi::status close() {
+        return _close(this);
+    }
+
+    inline uefi::status delete_file() {
+        return _delete_file(this);
+    }
+
+    inline uefi::status read(uint64_t * buffer_size, void * buffer) {
+        return _read(this, buffer_size, buffer);
+    }
+
+    inline uefi::status write(uint64_t * buffer_size, void * buffer) {
+        return _write(this, buffer_size, buffer);
+    }
+
+    inline uefi::status get_position(uint64_t * position) {
+        return _get_position(this, position);
+    }
+
+    inline uefi::status set_position(uint64_t position) {
+        return _set_position(this, position);
+    }
+
+    inline uefi::status get_info(const guid * info_type, uint64_t * buffer_size, void * buffer) {
+        return _get_info(this, info_type, buffer_size, buffer);
+    }
+
+    inline uefi::status set_info(const guid * info_type, uint64_t buffer_size, void * buffer) {
+        return _set_info(this, info_type, buffer_size, buffer);
+    }
+
+    inline uefi::status flush() {
+        return _flush(this);
+    }
+
+    inline uefi::status open_ex(file ** new_handle, const wchar_t * file_name, uint64_t open_mode, uint64_t attributes, file_io_token * token) {
+        return _open_ex(this, new_handle, file_name, open_mode, attributes, token);
+    }
+
+    inline uefi::status read_ex(file_io_token * token) {
+        return _read_ex(this, token);
+    }
+
+    inline uefi::status write_ex(file_io_token * token) {
+        return _write_ex(this, token);
+    }
+
+    inline uefi::status flush_ex(file_io_token * token) {
+        return _flush_ex(this, token);
+    }
+
+    uint64_t revision;
+
+protected:
+    using _open_def = uefi::status (*)(uefi::protos::file *, file **, const wchar_t *, file_mode, file_attr);
+    _open_def _open;
+
+    using _close_def = uefi::status (*)(uefi::protos::file *);
+    _close_def _close;
+
+    using _delete_file_def = uefi::status (*)(uefi::protos::file *);
+    _delete_file_def _delete_file;
+
+    using _read_def = uefi::status (*)(uefi::protos::file *, uint64_t *, void *);
+    _read_def _read;
+
+    using _write_def = uefi::status (*)(uefi::protos::file *, uint64_t *, void *);
+    _write_def _write;
+
+    using _get_position_def = uefi::status (*)(uefi::protos::file *, uint64_t *);
+    _get_position_def _get_position;
+
+    using _set_position_def = uefi::status (*)(uefi::protos::file *, uint64_t);
+    _set_position_def _set_position;
+
+    using _get_info_def = uefi::status (*)(uefi::protos::file *, const guid *, uint64_t *, void *);
+    _get_info_def _get_info;
+
+    using _set_info_def = uefi::status (*)(uefi::protos::file *, const guid *, uint64_t, void *);
+    _set_info_def _set_info;
+
+    using _flush_def = uefi::status (*)(uefi::protos::file *);
+    _flush_def _flush;
+
+    using _open_ex_def = uefi::status (*)(uefi::protos::file *, file **, const wchar_t *, uint64_t, uint64_t, file_io_token *);
+    _open_ex_def _open_ex;
+
+    using _read_ex_def = uefi::status (*)(uefi::protos::file *, file_io_token *);
+    _read_ex_def _read_ex;
+
+    using _write_ex_def = uefi::status (*)(uefi::protos::file *, file_io_token *);
+    _write_ex_def _write_ex;
+
+    using _flush_ex_def = uefi::status (*)(uefi::protos::file *, file_io_token *);
+    _flush_ex_def _flush_ex;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_file_h_

external/uefi/protos/file_info.h

@@ -0,0 +1,36 @@
+#pragma once
+#ifndef _uefi_protos_file_info_h_
+#define _uefi_protos_file_info_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+
+namespace uefi {
+namespace protos {
+struct file_info;
+
+struct file_info
+{
+    static constexpr uefi::guid guid{ 0x09576e92,0x6d3f,0x11d2,{0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    uint64_t size;
+    uint64_t file_size;
+    uint64_t physical_size;
+    time create_time;
+    time last_access_time;
+    time modification_time;
+    uint64_t attribute;
+    wchar_t file_name[];
+
+protected:
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_file_info_h_

external/uefi/protos/graphics_output.h

@@ -0,0 +1,51 @@
+#pragma once
+#ifndef _uefi_protos_graphics_output_h_
+#define _uefi_protos_graphics_output_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/graphics.h>
+
+namespace uefi {
+namespace protos {
+struct graphics_output;
+
+struct graphics_output
+{
+    static constexpr uefi::guid guid{ 0x9042a9de,0x23dc,0x4a38,{0x96,0xfb,0x7a,0xde,0xd0,0x80,0x51,0x6a} };
+
+
+    inline uefi::status query_mode(uint32_t mode_number, uint64_t * size_of_info, uefi::graphics_output_mode_info ** info) {
+        return _query_mode(this, mode_number, size_of_info, info);
+    }
+
+    inline uefi::status set_mode(uint32_t mode_number) {
+        return _set_mode(this, mode_number);
+    }
+
+    inline uefi::status blt() {
+        return _blt(this);
+    }
+
+
+protected:
+    using _query_mode_def = uefi::status (*)(uefi::protos::graphics_output *, uint32_t, uint64_t *, uefi::graphics_output_mode_info **);
+    _query_mode_def _query_mode;
+
+    using _set_mode_def = uefi::status (*)(uefi::protos::graphics_output *, uint32_t);
+    _set_mode_def _set_mode;
+
+    using _blt_def = uefi::status (*)(uefi::protos::graphics_output *);
+    _blt_def _blt;
+
+public:
+    uefi::graphics_output_mode * mode;
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_graphics_output_h_

external/uefi/protos/http.h

@@ -0,0 +1,72 @@
+#pragma once
+#ifndef _uefi_protos_http_h_
+#define _uefi_protos_http_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/networking.h>
+
+namespace uefi {
+namespace protos {
+struct http;
+
+struct http
+{
+    static constexpr uefi::guid guid{ 0x7a59b29b,0x910b,0x4171,{0x82,0x42,0xa8,0x5a,0x0d,0xf2,0x5b,0x5b} };
+    static constexpr uefi::guid service_binding{ 0xbdc8e6af,0xd9bc,0x4379,{0xa7,0x2a,0xe0,0xc4,0xe7,0x5d,0xae,0x1c} };
+
+
+    inline uefi::status get_mode_data(uefi::http_config_data * http_config_data) {
+        return _get_mode_data(this, http_config_data);
+    }
+
+    inline uefi::status configure(uefi::http_config_data * http_config_data) {
+        return _configure(this, http_config_data);
+    }
+
+    inline uefi::status request(uefi::http_token * token) {
+        return _request(this, token);
+    }
+
+    inline uefi::status cancel(uefi::http_token * token) {
+        return _cancel(this, token);
+    }
+
+    inline uefi::status response(uefi::http_token * token) {
+        return _response(this, token);
+    }
+
+    inline uefi::status poll() {
+        return _poll(this);
+    }
+
+
+protected:
+    using _get_mode_data_def = uefi::status (*)(uefi::protos::http *, uefi::http_config_data *);
+    _get_mode_data_def _get_mode_data;
+
+    using _configure_def = uefi::status (*)(uefi::protos::http *, uefi::http_config_data *);
+    _configure_def _configure;
+
+    using _request_def = uefi::status (*)(uefi::protos::http *, uefi::http_token *);
+    _request_def _request;
+
+    using _cancel_def = uefi::status (*)(uefi::protos::http *, uefi::http_token *);
+    _cancel_def _cancel;
+
+    using _response_def = uefi::status (*)(uefi::protos::http *, uefi::http_token *);
+    _response_def _response;
+
+    using _poll_def = uefi::status (*)(uefi::protos::http *);
+    _poll_def _poll;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_http_h_

external/uefi/protos/ip6.h

@@ -0,0 +1,93 @@
+#pragma once
+#ifndef _uefi_protos_ip6_h_
+#define _uefi_protos_ip6_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/networking.h>
+
+namespace uefi {
+namespace protos {
+struct ip6;
+
+struct ip6
+{
+    static constexpr uefi::guid guid{ 0x2c8759d5,0x5c2d,0x66ef,{0x92,0x5f,0xb6,0x6c,0x10,0x19,0x57,0xe2} };
+    static constexpr uefi::guid service_binding{ 0xec835dd3,0xfe0f,0x617b,{0xa6,0x21,0xb3,0x50,0xc3,0xe1,0x33,0x88} };
+
+
+    inline uefi::status get_mode_data(uefi::ip6_mode_data * ip6_mode_data, uefi::managed_network_config_data * mnp_config_data, uefi::simple_network_mode * snp_config_data) {
+        return _get_mode_data(this, ip6_mode_data, mnp_config_data, snp_config_data);
+    }
+
+    inline uefi::status configure(uefi::ip6_config_data * ip6_config_data) {
+        return _configure(this, ip6_config_data);
+    }
+
+    inline uefi::status groups(bool join_flag, uefi::ipv6_address * group_address) {
+        return _groups(this, join_flag, group_address);
+    }
+
+    inline uefi::status routes(bool delete_route, uefi::ipv6_address * destination, uint8_t prefix_length, uefi::ipv6_address * gateway_address) {
+        return _routes(this, delete_route, destination, prefix_length, gateway_address);
+    }
+
+    inline uefi::status neighbors(bool delete_flag, uefi::ipv6_address * target_ip6_address, uefi::mac_address * target_link_address, uint32_t timeout, bool override) {
+        return _neighbors(this, delete_flag, target_ip6_address, target_link_address, timeout, override);
+    }
+
+    inline uefi::status transmit(uefi::ip6_completion_token * token) {
+        return _transmit(this, token);
+    }
+
+    inline uefi::status receive(uefi::ip6_completion_token * token) {
+        return _receive(this, token);
+    }
+
+    inline uefi::status cancel(uefi::ip6_completion_token * token) {
+        return _cancel(this, token);
+    }
+
+    inline uefi::status poll() {
+        return _poll(this);
+    }
+
+
+protected:
+    using _get_mode_data_def = uefi::status (*)(uefi::protos::ip6 *, uefi::ip6_mode_data *, uefi::managed_network_config_data *, uefi::simple_network_mode *);
+    _get_mode_data_def _get_mode_data;
+
+    using _configure_def = uefi::status (*)(uefi::protos::ip6 *, uefi::ip6_config_data *);
+    _configure_def _configure;
+
+    using _groups_def = uefi::status (*)(uefi::protos::ip6 *, bool, uefi::ipv6_address *);
+    _groups_def _groups;
+
+    using _routes_def = uefi::status (*)(uefi::protos::ip6 *, bool, uefi::ipv6_address *, uint8_t, uefi::ipv6_address *);
+    _routes_def _routes;
+
+    using _neighbors_def = uefi::status (*)(uefi::protos::ip6 *, bool, uefi::ipv6_address *, uefi::mac_address *, uint32_t, bool);
+    _neighbors_def _neighbors;
+
+    using _transmit_def = uefi::status (*)(uefi::protos::ip6 *, uefi::ip6_completion_token *);
+    _transmit_def _transmit;
+
+    using _receive_def = uefi::status (*)(uefi::protos::ip6 *, uefi::ip6_completion_token *);
+    _receive_def _receive;
+
+    using _cancel_def = uefi::status (*)(uefi::protos::ip6 *, uefi::ip6_completion_token *);
+    _cancel_def _cancel;
+
+    using _poll_def = uefi::status (*)(uefi::protos::ip6 *);
+    _poll_def _poll;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_ip6_h_

external/uefi/protos/ip6_config.h

@@ -0,0 +1,57 @@
+#pragma once
+#ifndef _uefi_protos_ip6_config_h_
+#define _uefi_protos_ip6_config_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/networking.h>
+
+namespace uefi {
+namespace protos {
+struct ip6_config;
+
+struct ip6_config
+{
+    static constexpr uefi::guid guid{ 0x937fe521,0x95ae,0x4d1a,{0x89,0x29,0x48,0xbc,0xd9,0x0a,0xd3,0x1a} };
+
+
+    inline uefi::status set_data(uefi::ip6_config_data_type data_type, size_t data_size, void * data) {
+        return _set_data(this, data_type, data_size, data);
+    }
+
+    inline uefi::status get_data(uefi::ip6_config_data_type data_type, size_t data_size, void * data) {
+        return _get_data(this, data_type, data_size, data);
+    }
+
+    inline uefi::status register_data_notify(uefi::ip6_config_data_type data_type, uefi::event event) {
+        return _register_data_notify(this, data_type, event);
+    }
+
+    inline uefi::status unregister_data_notify(uefi::ip6_config_data_type data_type, uefi::event event) {
+        return _unregister_data_notify(this, data_type, event);
+    }
+
+
+protected:
+    using _set_data_def = uefi::status (*)(uefi::protos::ip6_config *, uefi::ip6_config_data_type, size_t, void *);
+    _set_data_def _set_data;
+
+    using _get_data_def = uefi::status (*)(uefi::protos::ip6_config *, uefi::ip6_config_data_type, size_t, void *);
+    _get_data_def _get_data;
+
+    using _register_data_notify_def = uefi::status (*)(uefi::protos::ip6_config *, uefi::ip6_config_data_type, uefi::event);
+    _register_data_notify_def _register_data_notify;
+
+    using _unregister_data_notify_def = uefi::status (*)(uefi::protos::ip6_config *, uefi::ip6_config_data_type, uefi::event);
+    _unregister_data_notify_def _unregister_data_notify;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_ip6_config_h_

external/uefi/protos/load_file.h

@@ -0,0 +1,36 @@
+#pragma once
+#ifndef _uefi_protos_load_file_h_
+#define _uefi_protos_load_file_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/protos/device_path.h>
+
+namespace uefi {
+namespace protos {
+struct load_file;
+
+struct load_file
+{
+    static constexpr uefi::guid guid{ {0x56ec3091,0x954c,0x11d2,{0x8e,0x3f,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    inline uefi::status load_file(uefi::protos::device_path * file_path, bool boot_policy, size_t * buffer_size, void * buffer) {
+        return _load_file(this, file_path, boot_policy, buffer_size, buffer);
+    }
+
+
+protected:
+    using _load_file_def = uefi::status (*)(uefi::protos::load_file *, uefi::protos::device_path *, bool, size_t *, void *);
+    _load_file_def _load_file;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_load_file_h_

external/uefi/protos/loaded_image.h

@@ -0,0 +1,49 @@
+#pragma once
+#ifndef _uefi_protos_loaded_image_h_
+#define _uefi_protos_loaded_image_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/tables.h>
+#include <uefi/protos/device_path.h>
+
+namespace uefi {
+namespace protos {
+struct loaded_image;
+
+struct loaded_image
+{
+    static constexpr uefi::guid guid{ 0x5b1b31a1,0x9562,0x11d2,{0x8e,0x3f,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    inline uefi::status unload(uefi::handle image_handle) {
+        return _unload(image_handle);
+    }
+
+    uint32_t revision;
+    uefi::handle parent_handle;
+    uefi::system_table * system_table;
+    uefi::handle device_handle;
+    uefi::protos::device_path * file_path;
+    void * reserved;
+    uint32_t load_options_size;
+    void * load_options;
+    void * image_base;
+    uint64_t image_size;
+    uefi::memory_type image_code_type;
+    uefi::memory_type image_data_type;
+
+protected:
+    using _unload_def = uefi::status (*)(uefi::handle);
+    _unload_def _unload;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_loaded_image_h_

external/uefi/protos/service_binding.h

@@ -0,0 +1,41 @@
+#pragma once
+#ifndef _uefi_protos_service_binding_h_
+#define _uefi_protos_service_binding_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+
+namespace uefi {
+namespace protos {
+struct service_binding;
+
+struct service_binding
+{
+
+
+    inline uefi::status create_child(uefi::handle * child_handle) {
+        return _create_child(this, child_handle);
+    }
+
+    inline uefi::status destroy_child(uefi::handle child_handle) {
+        return _destroy_child(this, child_handle);
+    }
+
+
+protected:
+    using _create_child_def = uefi::status (*)(uefi::protos::service_binding *, uefi::handle *);
+    _create_child_def _create_child;
+
+    using _destroy_child_def = uefi::status (*)(uefi::protos::service_binding *, uefi::handle);
+    _destroy_child_def _destroy_child;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_service_binding_h_

external/uefi/protos/simple_file_system.h

@@ -0,0 +1,37 @@
+#pragma once
+#ifndef _uefi_protos_simple_file_system_h_
+#define _uefi_protos_simple_file_system_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/protos/file.h>
+
+namespace uefi {
+namespace protos {
+struct simple_file_system;
+
+struct simple_file_system
+{
+    static constexpr uefi::guid guid{ 0x0964e5b22,0x6459,0x11d2,{0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    inline uefi::status open_volume(uefi::protos::file ** root) {
+        return _open_volume(this, root);
+    }
+
+    uint64_t revision;
+
+protected:
+    using _open_volume_def = uefi::status (*)(uefi::protos::simple_file_system *, uefi::protos::file **);
+    _open_volume_def _open_volume;
+
+public:
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_simple_file_system_h_

external/uefi/protos/simple_text_output.h

@@ -0,0 +1,93 @@
+#pragma once
+#ifndef _uefi_protos_simple_text_output_h_
+#define _uefi_protos_simple_text_output_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+#include <uefi/graphics.h>
+
+namespace uefi {
+namespace protos {
+struct simple_text_output;
+
+struct simple_text_output
+{
+    static constexpr uefi::guid guid{ 0x387477c2,0x69c7,0x11d2,{0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b} };
+
+
+    inline uefi::status reset(bool extended_verification) {
+        return _reset(this, extended_verification);
+    }
+
+    inline uefi::status output_string(const wchar_t * string) {
+        return _output_string(this, string);
+    }
+
+    inline uefi::status test_string(const wchar_t * string) {
+        return _test_string(this, string);
+    }
+
+    inline uefi::status query_mode(uint64_t mode_number, uint64_t * columns, uint64_t * rows) {
+        return _query_mode(this, mode_number, columns, rows);
+    }
+
+    inline uefi::status set_mode(uint64_t mode_number) {
+        return _set_mode(this, mode_number);
+    }
+
+    inline uefi::status set_attribute(uefi::attribute attribute) {
+        return _set_attribute(this, attribute);
+    }
+
+    inline uefi::status clear_screen() {
+        return _clear_screen(this);
+    }
+
+    inline uefi::status set_cursor_position(uint64_t column, uint64_t row) {
+        return _set_cursor_position(this, column, row);
+    }
+
+    inline uefi::status enable_cursor(bool visible) {
+        return _enable_cursor(this, visible);
+    }
+
+
+protected:
+    using _reset_def = uefi::status (*)(uefi::protos::simple_text_output *, bool);
+    _reset_def _reset;
+
+    using _output_string_def = uefi::status (*)(uefi::protos::simple_text_output *, const wchar_t *);
+    _output_string_def _output_string;
+
+    using _test_string_def = uefi::status (*)(uefi::protos::simple_text_output *, const wchar_t *);
+    _test_string_def _test_string;
+
+    using _query_mode_def = uefi::status (*)(uefi::protos::simple_text_output *, uint64_t, uint64_t *, uint64_t *);
+    _query_mode_def _query_mode;
+
+    using _set_mode_def = uefi::status (*)(uefi::protos::simple_text_output *, uint64_t);
+    _set_mode_def _set_mode;
+
+    using _set_attribute_def = uefi::status (*)(uefi::protos::simple_text_output *, uefi::attribute);
+    _set_attribute_def _set_attribute;
+
+    using _clear_screen_def = uefi::status (*)(uefi::protos::simple_text_output *);
+    _clear_screen_def _clear_screen;
+
+    using _set_cursor_position_def = uefi::status (*)(uefi::protos::simple_text_output *, uint64_t, uint64_t);
+    _set_cursor_position_def _set_cursor_position;
+
+    using _enable_cursor_def = uefi::status (*)(uefi::protos::simple_text_output *, bool);
+    _enable_cursor_def _enable_cursor;
+
+public:
+    uefi::text_output_mode * mode;
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_simple_text_output_h_

external/uefi/runtime_services.h

@@ -0,0 +1,52 @@
+#pragma once
+#ifndef _uefi_runtime_services_h_
+#define _uefi_runtime_services_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+#include <uefi/tables.h>
+
+namespace uefi {
+namespace rs_impl {
+	using convert_pointer = uefi::status (*)(uint64_t, void **);
+	using set_virtual_address_map = uefi::status (*)(size_t, size_t, uint32_t, memory_descriptor *);
+}
+
+struct runtime_services {
+	static constexpr uint64_t signature = 0x56524553544e5552ull;
+
+	table_header header;
+
+	// Time Services
+	void *get_time;
+	void *set_time;
+	void *get_wakeup_time;
+	void *set_wakeup_time;
+
+	// Virtual Memory Services
+	rs_impl::set_virtual_address_map set_virtual_address_map;
+	rs_impl::convert_pointer convert_pointer;
+
+	// Variable Services
+	void *get_variable;
+	void *get_next_variable_name;
+	void *set_variable;
+
+	// Miscellaneous Services
+	void *get_next_high_monotonic_count;
+	void *reset_system;
+
+	// UEFI 2.0 Capsule Services
+	void *update_capsule;
+	void *query_capsule_capabilities;
+
+	// Miscellaneous UEFI 2.0 Service
+	void *query_variable_info;
+};
+
+} // namespace uefi
+#endif

external/uefi/tables.h

@@ -0,0 +1,73 @@
+#pragma once
+#ifndef _uefi_tables_h_
+#define _uefi_tables_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+#include <uefi/guid.h>
+#include <uefi/types.h>
+
+namespace uefi {
+
+struct runtime_services;
+struct boot_services;
+namespace protos {
+	struct simple_text_input;
+	struct simple_text_output;
+}
+
+struct table_header
+{
+	uint64_t signature;
+	uint32_t revision;
+	uint32_t header_size;
+	uint32_t crc32;
+	uint32_t reserved;
+};
+
+struct configuration_table
+{
+	guid vendor_guid;
+	void *vendor_table;
+};
+
+struct system_table
+{
+	table_header header;
+
+	char16_t *firmware_vendor;
+	uint32_t firmware_revision;
+
+	handle console_in_handle;
+	protos::simple_text_input *con_in;
+	handle console_out_handle;
+	protos::simple_text_output *con_out;
+	handle standard_error_handle;
+	protos::simple_text_output *std_err;
+
+	runtime_services *runtime_services;
+	boot_services *boot_services;
+
+	unsigned int number_of_table_entries;
+	configuration_table *configuration_table;
+};
+
+constexpr uint32_t make_system_table_revision(int major, int minor) {
+	return (major << 16) | minor;
+}
+
+constexpr uint64_t system_table_signature = 0x5453595320494249ull;
+constexpr uint32_t system_table_revision = make_system_table_revision(2, 70);
+constexpr uint32_t specification_revision = system_table_revision;
+
+namespace vendor_guids {
+	constexpr guid acpi1{ 0xeb9d2d30,0x2d88,0x11d3,{0x9a,0x16,0x00,0x90,0x27,0x3f,0xc1,0x4d} };
+	constexpr guid acpi2{ 0x8868e871,0xe4f1,0x11d3,{0xbc,0x22,0x00,0x80,0xc7,0x3c,0x88,0x81} };
+} // namespace vendor_guids
+} // namespace uefi
+
+#endif

external/uefi/types.h

@@ -0,0 +1,157 @@
+#pragma once
+#ifndef _uefi_types_h_
+#define _uefi_types_h_
+
+// This Source Code Form is part of the j6-uefi-headers project and is subject
+// to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was
+// not distributed with this file, You can obtain one at
+// http://mozilla.org/MPL/2.0/.
+
+#include <stdint.h>
+
+namespace uefi {
+
+using handle = void *;
+
+
+//
+// Error and status code definitions
+//
+constexpr uint64_t error_bit = 0x8000000000000000ull; 
+constexpr uint64_t make_error(uint64_t e) { return e|error_bit; }
+
+enum class status : uint64_t
+{
+	success = 0,
+
+#define STATUS_WARNING(name, num) name = num,
+#define STATUS_ERROR(name, num) name = make_error(num),
+#include "uefi/errors.inc"
+#undef STATUS_WARNING
+#undef STATUS_ERROR
+};
+
+inline bool is_error(status s) { return static_cast<uint64_t>(s) & error_bit; }
+inline bool is_warning(status s) { return !is_error(s) && s != status::success; }
+
+
+//
+// Time defitions
+//
+struct time
+{
+	uint16_t year;
+	uint8_t month;
+	uint8_t day;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+	uint8_t _pad0;
+	uint32_t nanosecond;
+	int16_t time_zone;
+	uint8_t daylight;
+	uint8_t _pad1;
+};
+
+
+//
+// Memory and allocation defitions
+//
+enum class memory_type : uint32_t
+{
+	reserved,
+	loader_code,
+	loader_data,
+	boot_services_code,
+	boot_services_data,
+	runtime_services_code,
+	runtime_services_data,
+	conventional_memory,
+	unusable_memory,
+	acpi_reclaim_memory,
+	acpi_memory_nvs,
+	memory_mapped_io,
+	memory_mapped_io_port_space,
+	pal_code,
+	persistent_memory,
+	max_memory_type
+};
+
+enum class allocate_type : uint32_t
+{
+	any_pages,
+	max_address,
+	address
+};
+
+struct memory_descriptor
+{
+	memory_type type;
+	uintptr_t physical_start;
+	uintptr_t virtual_start;
+	uint64_t number_of_pages;
+	uint64_t attribute;
+};
+
+
+//
+// Event handling defitions
+//
+using event = void *;
+
+enum class evt : uint32_t
+{
+	notify_wait                   = 0x00000100,
+	notify_signal                 = 0x00000200,
+
+	signal_exit_boot_services     = 0x00000201,
+	signal_virtual_address_change = 0x60000202,
+
+	runtime                       = 0x40000000,
+	timer                         = 0x80000000
+};
+
+enum class tpl : uint64_t
+{
+	application = 4,
+	callback    = 8,
+	notify      = 16,
+	high_level  = 31
+};
+
+using event_notify = void (*)(event, void*);
+
+
+//
+// File IO defitions
+//
+struct file_io_token
+{
+	event event;
+	status status;
+	uint64_t buffer_size;
+	void *buffer;
+};
+
+enum class file_mode : uint64_t
+{
+	read   = 0x0000000000000001ull,
+	write  = 0x0000000000000002ull,
+
+	create = 0x8000000000000000ull
+};
+
+enum class file_attr : uint64_t
+{
+	none      = 0,
+	read_only = 0x0000000000000001ull,
+	hidden    = 0x0000000000000002ull,
+	system    = 0x0000000000000004ull,
+	reserved  = 0x0000000000000008ull,
+	directory = 0x0000000000000010ull,
+	archive   = 0x0000000000000020ull
+};
+
+} // namespace uefi
+
+#endif

modules.yaml

@@ -0,0 +1,330 @@
+name: jsix
+templates: scripts/templates
+modules:
+    kernel:
+        kind: exe
+        output: jsix.elf
+        target: host
+        deps:
+            - cpu
+            - kutil
+        includes:
+            - src/kernel
+        source:
+            - src/kernel/apic.cpp
+            - src/kernel/assert.cpp
+            - src/kernel/boot.s
+            - src/kernel/clock.cpp
+            - src/kernel/console.cpp
+            - src/kernel/cpprt.cpp
+            - src/kernel/cpu.cpp
+            - src/kernel/debug.cpp
+            - src/kernel/debug.s
+            - src/kernel/device_manager.cpp
+            - src/kernel/frame_allocator.cpp
+            - src/kernel/fs/gpt.cpp
+            - src/kernel/gdt.cpp
+            - src/kernel/gdt.s
+            - src/kernel/hpet.cpp
+            - src/kernel/interrupts.cpp
+            - src/kernel/interrupts.s
+            - src/kernel/io.cpp
+            - src/kernel/log.cpp
+            - src/kernel/main.cpp
+            - src/kernel/memory_bootstrap.cpp
+            - src/kernel/msr.cpp
+            - src/kernel/objects/channel.cpp
+            - src/kernel/objects/endpoint.cpp
+            - src/kernel/objects/kobject.cpp
+            - src/kernel/objects/thread.cpp
+            - src/kernel/objects/process.cpp
+            - src/kernel/objects/system.cpp
+            - src/kernel/objects/vm_area.cpp
+            - src/kernel/page_table.cpp
+            - src/kernel/page_tree.cpp
+            - src/kernel/pci.cpp
+            - src/kernel/scheduler.cpp
+            - src/kernel/serial.cpp
+            - src/kernel/symbol_table.cpp
+            - src/kernel/syscall.cpp
+            - src/kernel/syscall.s
+            - src/kernel/syscalls/channel.cpp
+            - src/kernel/syscalls/endpoint.cpp
+            - src/kernel/syscalls/object.cpp
+            - src/kernel/syscalls/process.cpp
+            - src/kernel/syscalls/system.cpp
+            - src/kernel/syscalls/thread.cpp
+            - src/kernel/syscalls/vm_area.cpp
+            - src/kernel/task.s
+            - src/kernel/vm_space.cpp
+
+    boot:
+        kind: exe
+        target: boot
+        output: boot.efi
+        deps:
+            - cpu
+        source:
+            - src/boot/main.cpp
+            - src/boot/console.cpp
+            - src/boot/error.cpp
+            - src/boot/fs.cpp
+            - src/boot/hardware.cpp
+            - src/boot/loader.cpp
+            - src/boot/memory.cpp
+            - src/boot/paging.cpp
+            - src/boot/status.cpp
+            - src/boot/support.cpp
+
+    nulldrv:
+        kind: exe
+        target: user
+        output: nulldrv.elf
+        deps:
+          - libc
+        source:
+            - src/drivers/nulldrv/io.cpp
+            - src/drivers/nulldrv/main.cpp
+            - src/drivers/nulldrv/serial.cpp
+
+    fb:
+        kind: exe
+        target: user
+        output: fb.elf
+        deps:
+          - libc
+        source:
+            - src/drivers/fb/font.cpp
+            - src/drivers/fb/main.cpp
+            - src/drivers/fb/screen.cpp
+            - src/drivers/fb/scrollback.cpp
+
+    kutil:
+        kind: lib
+        output: libkutil.a
+        includes:
+            - src/libraries/kutil/include
+        source:
+            - src/libraries/kutil/assert.cpp
+            - src/libraries/kutil/bip_buffer.cpp
+            - src/libraries/kutil/heap_allocator.cpp
+            - src/libraries/kutil/logger.cpp
+            - src/libraries/kutil/memory.cpp
+            - src/libraries/kutil/printf.c
+
+    cpu:
+        kind: lib
+        output: libcpu.a
+        includes:
+            - src/libraries/cpu/include
+        source:
+            - src/libraries/cpu/cpu.cpp
+
+    j6:
+      kind: lib
+      output: libj6.a
+      includes:
+        - src/libraries/j6/include
+      target: user
+      source:
+        - src/libraries/j6/syscalls.s
+
+    libc:
+        kind: lib
+        output: libc.a
+        includes:
+          - src/libraries/libc/include
+        deps:
+            - j6
+        target: user
+        defines:
+            - DISABLE_SSE
+            - LACKS_UNISTD_H
+            - LACKS_FCNTL_H
+            - LACKS_SYS_PARAM_H
+            - LACKS_SYS_MMAN_H
+            - LACKS_SCHED_H
+            - LACKS_STRINGS_H
+            - HAVE_MMAP=0
+              #- LACKS_STRING_H
+              #- LACKS_ERRNO_H
+              #- LACKS_STDLIB_H
+              #- LACKS_TIME_H
+        source:
+            - src/libraries/libc/arch/x86_64/_Exit.s
+            - src/libraries/libc/arch/x86_64/crt0.s
+            - src/libraries/libc/arch/x86_64/init_libc.c
+            - src/libraries/libc/ctype/isalnum.c
+            - src/libraries/libc/ctype/isalpha.c
+            - src/libraries/libc/ctype/isblank.c
+            - src/libraries/libc/ctype/iscntrl.c
+            - src/libraries/libc/ctype/isdigit.c
+            - src/libraries/libc/ctype/isgraph.c
+            - src/libraries/libc/ctype/islower.c
+            - src/libraries/libc/ctype/isprint.c
+            - src/libraries/libc/ctype/ispunct.c
+            - src/libraries/libc/ctype/isspace.c
+            - src/libraries/libc/ctype/isupper.c
+            - src/libraries/libc/ctype/isxdigit.c
+            - src/libraries/libc/ctype/tolower.c
+            - src/libraries/libc/ctype/toupper.c
+            - src/libraries/libc/inttypes/imaxabs.c
+            - src/libraries/libc/inttypes/imaxdiv.c
+            - src/libraries/libc/inttypes/strtoimax.c
+            - src/libraries/libc/inttypes/strtoumax.c
+            - src/libraries/libc/locale/localeconv.c
+            - src/libraries/libc/locale/setlocale.c
+            - src/libraries/libc/j6libc/assert.c
+            - src/libraries/libc/j6libc/errno.c
+            - src/libraries/libc/j6libc/allocpages.c
+            - src/libraries/libc/j6libc/atomax.c
+            - src/libraries/libc/j6libc/closeall.c
+            - src/libraries/libc/j6libc/close.c
+            - src/libraries/libc/j6libc/digits.c
+            - src/libraries/libc/j6libc/filemode.c
+            - src/libraries/libc/j6libc/fillbuffer.c
+            - src/libraries/libc/j6libc/flushbuffer.c
+            - src/libraries/libc/j6libc/is_leap.c
+            - src/libraries/libc/j6libc/load_lc_collate.c
+            - src/libraries/libc/j6libc/load_lc_ctype.c
+            - src/libraries/libc/j6libc/load_lc_messages.c
+            - src/libraries/libc/j6libc/load_lc_monetary.c
+            - src/libraries/libc/j6libc/load_lc_numeric.c
+            - src/libraries/libc/j6libc/load_lc_time.c
+            - src/libraries/libc/j6libc/load_lines.c
+            - src/libraries/libc/j6libc/open.c
+            - src/libraries/libc/j6libc/prepread.c
+            - src/libraries/libc/j6libc/prepwrite.c
+            - src/libraries/libc/j6libc/print.c
+            - src/libraries/libc/j6libc/rename.c
+            - src/libraries/libc/j6libc/scan.c
+            - src/libraries/libc/j6libc/seed.c
+            - src/libraries/libc/j6libc/seek.c
+            - src/libraries/libc/j6libc/stdinit.c
+            - src/libraries/libc/j6libc/strtox_main.c
+            - src/libraries/libc/j6libc/strtox_prelim.c
+            - src/libraries/libc/j6libc/sbrk.c
+            - src/libraries/libc/signal/raise.c
+            - src/libraries/libc/signal/signal.c
+            - src/libraries/libc/stdio/clearerr.c
+            - src/libraries/libc/stdio/fclose.c
+            - src/libraries/libc/stdio/feof.c
+            - src/libraries/libc/stdio/ferror.c
+            - src/libraries/libc/stdio/fflush.c
+            - src/libraries/libc/stdio/fgetc.c
+            - src/libraries/libc/stdio/fgetpos.c
+            - src/libraries/libc/stdio/fgets.c
+            - src/libraries/libc/stdio/fopen.c
+            - src/libraries/libc/stdio/fprintf.c
+            - src/libraries/libc/stdio/fputc.c
+            - src/libraries/libc/stdio/fputs.c
+            - src/libraries/libc/stdio/fread.c
+            - src/libraries/libc/stdio/freopen.c
+            - src/libraries/libc/stdio/fscanf.c
+            - src/libraries/libc/stdio/fseek.c
+            - src/libraries/libc/stdio/fsetpos.c
+            - src/libraries/libc/stdio/ftell.c
+            - src/libraries/libc/stdio/fwrite.c
+            - src/libraries/libc/stdio/getc.c
+            - src/libraries/libc/stdio/getchar.c
+            - src/libraries/libc/stdio/perror.c
+            - src/libraries/libc/stdio/printf.c
+            - src/libraries/libc/stdio/putc.c
+            - src/libraries/libc/stdio/putchar.c
+            - src/libraries/libc/stdio/puts.c
+            - src/libraries/libc/stdio/remove.c
+            - src/libraries/libc/stdio/rename.c
+            - src/libraries/libc/stdio/rewind.c
+            - src/libraries/libc/stdio/scanf.c
+            - src/libraries/libc/stdio/setbuf.c
+            - src/libraries/libc/stdio/setvbuf.c
+            - src/libraries/libc/stdio/snprintf.c
+            - src/libraries/libc/stdio/sprintf.c
+            - src/libraries/libc/stdio/sscanf.c
+            - src/libraries/libc/stdio/tmpfile.c
+            - src/libraries/libc/stdio/tmpnam.c
+            - src/libraries/libc/stdio/ungetc.c
+            - src/libraries/libc/stdio/vfprintf.c
+            - src/libraries/libc/stdio/vfscanf.c
+            - src/libraries/libc/stdio/vprintf.c
+            - src/libraries/libc/stdio/vscanf.c
+            - src/libraries/libc/stdio/vsnprintf.c
+            - src/libraries/libc/stdio/vsprintf.c
+            - src/libraries/libc/stdio/vsscanf.c
+            - src/libraries/libc/stdlib/abort.c
+            - src/libraries/libc/stdlib/abs.c
+            - src/libraries/libc/stdlib/atexit.c
+            - src/libraries/libc/stdlib/atoi.c
+            - src/libraries/libc/stdlib/atol.c
+            - src/libraries/libc/stdlib/atoll.c
+            - src/libraries/libc/stdlib/bsearch.c
+            - src/libraries/libc/stdlib/div.c
+            - src/libraries/libc/stdlib/exit.c
+            - src/libraries/libc/stdlib/_Exit.c
+            - src/libraries/libc/stdlib/getenv.c
+            - src/libraries/libc/stdlib/labs.c
+            - src/libraries/libc/stdlib/ldiv.c
+            - src/libraries/libc/stdlib/llabs.c
+            - src/libraries/libc/stdlib/lldiv.c
+            - src/libraries/libc/stdlib/malloc.c
+            - src/libraries/libc/stdlib/qsort.c
+            - src/libraries/libc/stdlib/rand.c
+            - src/libraries/libc/stdlib/srand.c
+            - src/libraries/libc/stdlib/strtol.c
+            - src/libraries/libc/stdlib/strtoll.c
+            - src/libraries/libc/stdlib/strtoul.c
+            - src/libraries/libc/stdlib/strtoull.c
+            - src/libraries/libc/stdlib/system.c
+            - src/libraries/libc/string/memchr.c
+            - src/libraries/libc/string/memcmp.c
+            - src/libraries/libc/string/memcpy.c
+            - src/libraries/libc/string/memmove.c
+            - src/libraries/libc/string/memset.c
+            - src/libraries/libc/string/strcat.c
+            - src/libraries/libc/string/strchr.c
+            - src/libraries/libc/string/strcmp.c
+            - src/libraries/libc/string/strcoll.c
+            - src/libraries/libc/string/strcpy.c
+            - src/libraries/libc/string/strcspn.c
+            - src/libraries/libc/string/strerror.c
+            - src/libraries/libc/string/strlen.c
+            - src/libraries/libc/string/strncat.c
+            - src/libraries/libc/string/strncmp.c
+            - src/libraries/libc/string/strncpy.c
+            - src/libraries/libc/string/strpbrk.c
+            - src/libraries/libc/string/strrchr.c
+            - src/libraries/libc/string/strspn.c
+            - src/libraries/libc/string/strstr.c
+            - src/libraries/libc/string/strtok.c
+            - src/libraries/libc/string/strxfrm.c
+            - src/libraries/libc/time/asctime.c
+            - src/libraries/libc/time/clock.c
+            - src/libraries/libc/time/ctime.c
+            - src/libraries/libc/time/difftime.c
+            - src/libraries/libc/time/gmtime.c
+            - src/libraries/libc/time/localtime.c
+            - src/libraries/libc/time/mktime.c
+            - src/libraries/libc/time/strftime.c
+            - src/libraries/libc/time/time.c
+            - src/libraries/libc/time/timespec_get.c
+
+    tests:
+        kind: exe
+        target: native
+        output: tests
+        deps:
+            - kutil
+        source:
+            - src/tests/constexpr_hash.cpp
+            - src/tests/linked_list.cpp
+            - src/tests/logger.cpp
+            - src/tests/heap_allocator.cpp
+            - src/tests/main.cpp
+            - src/tests/map.cpp
+            - src/tests/vector.cpp
+
+overlays:
+    - url: https://f000.backblazeb2.com/file/jsix-os/sysroot-llvm8-20190706.tar.bz2
+      path: sysroot
+    - url: https://f000.backblazeb2.com/file/jsix-os/sysroot-j6libc-8cb8ce7.tar.bz2
+      path: sysroot

other_software.md

@@ -0,0 +1,89 @@
+# Included works
+
+jsix includes and/or is derived from a number of other works, listed here.
+
+## Catch2
+
+jsix uses [Catch2][] for testing. Catch2 is released under the terms of the
+Boost Software license:
+
+[Catch2]: https://github.com/catchorg/Catch2
+
+> Boost Software License - Version 1.0 - August 17th, 2003
+> 
+> Permission is hereby granted, free of charge, to any person or organization
+> obtaining a copy of the software and accompanying documentation covered by
+> this license (the "Software") to use, reproduce, display, distribute,
+> execute, and transmit the Software, and to prepare derivative works of the
+> Software, and to permit third-parties to whom the Software is furnished to
+> do so, all subject to the following:
+> 
+> The copyright notices in the Software and this entire statement, including
+> the above license grant, this restriction and the following disclaimer,
+> must be included in all copies of the Software, in whole or in part, and
+> all derivative works of the Software, unless such copies or derivative
+> works are solely in the form of machine-executable object code generated by
+> a source language processor.
+> 
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+> SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+> FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+> ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+> DEALINGS IN THE SOFTWARE.
+
+## cpptoml
+
+jsix uses the [cpptoml][] library for parsing TOML configuration files. cpptoml
+is released under the terms of the MIT license:
+
+[cpptoml]: https://github.com/skystrife/cpptoml
+
+> Copyright (c) 2014 Chase Geigle
+>
+> Permission is hereby granted, free of charge, to any person obtaining a copy of
+> this software and associated documentation files (the "Software"), to deal in
+> the Software without restriction, including without limitation the rights to
+> use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+> the Software, and to permit persons to whom the Software is furnished to do so,
+> subject to the following conditions:
+> 
+> The above copyright notice and this permission notice shall be included in all
+> copies or substantial portions of the Software.
+> 
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+> FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+> COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+> IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+> CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+## printf
+
+jsix uses Marco Paland's tiny [printf][] library for its `*printf()` functions,
+which is also released under the terms of the MIT license:
+
+[printf]: https://github.com/mpaland/printf
+
+> The MIT License (MIT)
+>
+> Copyright (c) 2014 Marco Paland
+>
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+>
+> The above copyright notice and this permission notice shall be included in all
+> copies or substantial portions of the Software.
+>
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+> SOFTWARE.

qemu.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+build="$(dirname $0)/build"
+assets="$(dirname $0)/assets"
+debug=""
+debugtarget="${build}/jsix.elf"
+flash_name="ovmf_vars"
+gfx="-nographic"
+vga="-vga none"
+kvm=""
+cpu="Broadwell,+pdpe1gb"
+
+for arg in $@; do
+	case "${arg}" in
+		--debugboot)
+			debug="-s -S"
+			debugtarget="${build}/boot/boot.efi"
+			flash_name="ovmf_vars_d"
+			;;
+		--debug)
+			debug="-s -S"
+			flash_name="ovmf_vars_d"
+			;;
+		--gfx)
+			gfx=""
+			vga=""
+			;;
+		--vga)
+			vga=""
+			;;
+		--kvm)
+			kvm="-enable-kvm"
+			cpu="host"
+			;;
+		*)
+			build="${arg}"
+			;;
+	esac
+done
+
+if [[ ! -c /dev/kvm ]]; then
+	kvm=""
+fi
+
+if ! ninja -C "${build}"; then
+	exit 1
+fi
+
+if [[ -n $TMUX ]]; then
+	if [[ -n $debug ]]; then
+		tmux split-window -h "gdb ${debugtarget}" &
+	else
+		tmux split-window -h -l 80 "sleep 1; telnet localhost 45455" &
+		tmux last-pane
+		tmux split-window -l 10 "sleep 1; telnet localhost 45454" &
+	fi
+elif [[ $DESKTOP_SESSION = "i3" ]]; then
+	if [[ -n $debug ]]; then
+		i3-msg exec i3-sensible-terminal -- -e "gdb ${PWD}/${build}/jsix.elf" &
+	else
+		i3-msg exec i3-sensible-terminal -- -e 'telnet localhost 45454' &
+	fi
+fi
+
+exec qemu-system-x86_64 \
+	-drive "if=pflash,format=raw,readonly,file=${assets}/ovmf/x64/ovmf_code.fd" \
+	-drive "if=pflash,format=raw,file=${build}/${flash_name}.fd" \
+	-drive "format=raw,file=${build}/jsix.img" \
+	-device "isa-debug-exit,iobase=0xf4,iosize=0x04" \
+	-monitor telnet:localhost:45454,server,nowait \
+	-serial stdio \
+	-serial telnet:localhost:45455,server,nowait \
+	-smp 4 \
+	-m 512 \
+	-d mmu,int,guest_errors \
+	-D jsix.log \
+	-cpu "${cpu}" \
+	-M q35 \
+	-no-reboot \
+	$gfx $vga $kvm $debug

scripts/build_symbol_table.py

@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+#
+# Generate the jsix style symbol table. The format in memory of this table
+# is as follows:
+#
+# <num_entires> : 8 bytes
+# <index>       : 16 * N bytes
+# <name data>   : variable
+#
+# Each index entry has the format
+# <symbol address> : 8 bytes
+# <offset of name> : 8 bytes
+#
+# Name offsets are from the start of the symbol table as a whole. (ie,
+# where <num_entries> is located.)
+
+def parse_syms(infile):
+    """Take the output of the `nm` command, and parse it into a tuple
+    representing the symbols in the text segment of the binary. Returns
+    a list of (address, symbol_name)."""
+
+    from cxxfilt import demangle, InvalidName
+
+    syms = []
+    for line in sys.stdin:
+        addr, t, mangled = line.split()
+        if t not in "tTvVwW": continue
+
+        try:
+            name = demangle(mangled)
+        except InvalidName:
+            continue
+
+        addr = int(addr, base=16)
+        syms.append((addr, name))
+
+    return sorted(syms)
+
+
+def write_table(syms, outfile):
+    """Write the given symbol table as generated by parse_syms()
+    to the outfile, index first, and then name character data."""
+
+    import struct
+
+    outfile.write(struct.pack("@Q", len(syms)))
+    index_pos = outfile.tell()
+
+    outfile.seek(struct.calcsize("@QQ") * len(syms), 1)
+    nul = b'\0'
+
+    positions = {}
+    for s in syms:
+        addr, name = s
+        positions[addr] = outfile.tell()
+
+        data = name.encode('utf-8')
+        outfile.write(name.encode('utf-8'))
+        outfile.write(nul)
+
+    outfile.seek(index_pos)
+    for s in syms:
+        addr = s[0]
+        pos = positions[addr]
+        outfile.write(struct.pack("@QQ", addr, pos))
+
+
+if __name__ == "__main__":
+    import sys
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} <output>")
+        sys.exit(1)
+
+    outfile = open(sys.argv[1], "wb")
+    write_table(parse_syms(sys.stdin), outfile)

scripts/build_sysroot.sh

@@ -0,0 +1,131 @@
+#!/usr/bin/env bash
+
+TARGET="x86_64-elf"
+LLVM_BRANCH="release_80"
+
+TOOLS="clang lld" # lld libunwind libcxxabi libcxx"
+PROJECTS="compiler-rt libcxxabi libcxx libunwind"
+#RUNTIMES="compiler-rt libcxxabi libcxx libunwind"
+
+set -e
+
+README=$(realpath "$(dirname $0)/readme_for_prebuilt_sysroots.md")
+SYSROOT=$(realpath "$(dirname $0)/../sysroot")
+WORK=$(realpath "$(dirname $0)/sysroot")
+mkdir -p "${SYSROOT}"
+mkdir -p "${WORK}"
+
+export CC=clang
+export CXX=clang++
+
+if [[ ! -d "${WORK}/llvm" ]]; then
+	echo "Downloading LLVM..."
+	git clone -q \
+		--branch "${LLVM_BRANCH}" \
+		--depth 1 \
+		"https://git.llvm.org/git/llvm.git" "${WORK}/llvm"
+fi
+
+for tool in ${TOOLS}; do
+	if [[ ! -d "${WORK}/llvm/tools/${tool}" ]]; then
+		echo "Downloading ${tool}..."
+		git clone -q \
+			--branch "${LLVM_BRANCH}" \
+			--depth 1 \
+			"https://git.llvm.org/git/${tool}.git" "${WORK}/llvm/tools/${tool}"
+	fi
+done
+
+if [[ ! -d "${WORK}/llvm/tools/clang/tools/extra" ]]; then
+	echo "Downloading clang-tools-extra..."
+	git clone -q \
+		--branch "${LLVM_BRANCH}" \
+		--depth 1 \
+		"https://git.llvm.org/git/clang-tools-extra.git" "${WORK}/llvm/tools/clang/tools/extra"
+fi
+
+for proj in ${PROJECTS}; do
+	if [[ ! -d "${WORK}/llvm/projects/${proj}" ]]; then
+		echo "Downloading ${proj}..."
+		git clone -q \
+			--branch "${LLVM_BRANCH}" \
+			--depth 1 \
+			"https://git.llvm.org/git/${proj}.git" "${WORK}/llvm/projects/${proj}"
+	fi
+done
+
+for proj in ${RUNTIMES}; do
+	if [[ ! -d "${WORK}/llvm/runtimes/${proj}" ]]; then
+		echo "Downloading ${proj}..."
+		git clone -q \
+			--branch "${LLVM_BRANCH}" \
+			--depth 1 \
+			"https://git.llvm.org/git/${proj}.git" "${WORK}/llvm/runtime/${proj}"
+	fi
+done
+
+mkdir -p "${WORK}/build/llvm"
+pushd "${WORK}/build/llvm"
+
+echo "Configuring LLVM..."
+
+cmake -G Ninja \
+	-DCLANG_DEFAULT_RTLIB=compiler-rt \
+	-DCLANG_DEFAULT_STD_C=c11 \
+	-DCLANG_DEFAULT_STD_CXX=cxx14 \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DCMAKE_C_COMPILER="clang" \
+	-DCMAKE_CXX_COMPILER="clang++" \
+	-DCMAKE_CXX_FLAGS="-Wno-unused-parameter -D_LIBCPP_HAS_NO_ALIGNED_ALLOCATION -D_LIBUNWIND_IS_BAREMETAL=1 -U_LIBUNWIND_SUPPORT_DWARF_UNWIND" \
+	-DCMAKE_INSTALL_PREFIX="${SYSROOT}" \
+	-DCMAKE_MAKE_PROGRAM=`which ninja` \
+	-DDEFAULT_SYSROOT="${SYSROOT}" \
+	-DLIBCXX_CXX_ABI=libcxxabi \
+	-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${WORK}/llvm/projects/libcxxabi/include" \
+	-DLIBCXX_CXX_ABI_LIBRARY_PATH=lib \
+	-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
+	-DLIBCXX_ENABLE_NEW_DELETE_DEFINITIONS=ON \
+	-DLIBCXX_ENABLE_SHARED=OFF \
+	-DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=ON \
+	-DLIBCXX_ENABLE_THREADS=OFF \
+	-DLIBCXX_INCLUDE_BENCHMARKS=OFF \
+	-DLIBCXX_USE_COMPILER_RT=ON \
+	-DLIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS=OFF \
+	-DLIBCXXABI_ENABLE_SHARED=OFF \
+	-DLIBCXXABI_ENABLE_STATIC_UNWINDER=ON \
+	-DLIBCXXABI_ENABLE_THREADS=OFF \
+	-DLIBCXXABI_LIBCXX_PATH="${WORK}/llvm/projects/libcxx" \
+	-DLIBCXXABI_USE_COMPILER_RT=ON \
+	-DLIBCXXABI_USE_LLVM_UNWINDER=ON \
+	-DLIBUNWIND_ENABLE_SHARED=OFF \
+	-DLIBUNWIND_ENABLE_THREADS=OFF \
+	-DLIBUNWIND_USE_COMPILER_RT=ON \
+	-DLLVM_CONFIG_PATH="${SYSROOT}/bin/llvm-config" \
+	-DLLVM_DEFAULT_TARGET_TRIPLE="x86_64-unknown-elf" \
+	-DLLVM_ENABLE_LIBCXX=ON \
+	-DLLVM_ENABLE_LLD=ON \
+	-DLLVM_ENABLE_PIC=OFF \
+	-DLLVM_ENABLE_THREADS=OFF \
+	-DLLVM_INSTALL_BINUTILS_SYMLINKS=ON \
+	-DLLVM_TARGETS_TO_BUILD="X86" \
+	${WORK}/llvm > cmake_configure.log
+
+#  -DCMAKE_ASM_COMPILER=nasm \
+#  -DCMAKE_LINKER="${SYSROOT}/bin/ld.lld" \
+#  -DCOMPILER_RT_ENABLE_LLD=ON \
+#  -DLIBCXX_ENABLE_LLD=ON \
+#  -DLIBCXX_ENABLE_STATIC_UNWINDER=ON \
+#  -DLIBCXXABI_ENABLE_LLD=ON \
+#  -DLIBUNWIND_ENABLE_LLD=ON \
+#  -DLLVM_ENABLE_PROJECTS="libcxx;libcxxabi;libunwind;compiler-rt" \
+#  -DCOMPILER_RT_BAREMETAL_BUILD=ON \
+#  -DLIBCXXABI_BAREMETAL=ON \
+
+echo "Building LLVM..."
+ninja && ninja install
+ninja cxx cxxabi compiler-rt
+ninja install-compiler-rt install-cxx install-cxxabi
+popd
+
+
+cp "${README}" "${SYSROOT}/README.md"

scripts/fontpsf.py

@@ -0,0 +1,75 @@
+_MAGIC = (0x72, 0xb5, 0x4a, 0x86)
+_VERSION = 0
+
+class PSF2:
+    from collections import namedtuple
+    Header = namedtuple("PSF2Header",
+        ["version", "offset", "flags", "count", "charsize", "height", "width"])
+
+    def __init__(self, filename, header, data):
+        self.__filename = filename
+        self.__header = header
+        self.__data = data
+
+    data = property(lambda self: self.__data)
+    header = property(lambda self: self.__header)
+    count = property(lambda self: self.__header.count)
+    charsize = property(lambda self: self.__header.charsize)
+    dimension = property(lambda self: (self.__header.width, self.__header.height))
+    filename = property(lambda self: self.__filename)
+
+    @classmethod
+    def load(cls, filename):
+        from os.path import basename
+        from struct import unpack_from
+
+        data = open(filename, 'rb').read()
+
+        fmt = "BBBBIIIIIII"
+        values = unpack_from(fmt, data)
+
+        if values[:len(_MAGIC)] != _MAGIC:
+            raise Exception("Bad magic number in header")
+
+        header = PSF2.Header(*values[len(_MAGIC):])
+        if header.version != _VERSION:
+            raise Exception(f"Bad version {header.version} in header")
+
+        return cls(basename(filename), header, data)
+
+    class Glyph:
+        __slots__ = ['index', 'data']
+        def __init__(self, i, data):
+            self.index = i
+            self.data = data
+        def __index__(self):
+            return self.index
+        def empty(self):
+            return not bool([b for b in self.data if b != 0])
+        def description(self):
+            c = chr(self.index)
+            if c.isprintable():
+                return "Glyph {:02x}: '{}'".format(self.index, c)
+            else:
+                return "Glyph {:02x}".format(self.index)
+
+    def __getitem__(self, i):
+        c = self.__header.charsize
+        n = i * c + self.__header.offset
+        return PSF2.Glyph(i, self.__data[n:n+c])
+
+    class __iter:
+        __slots__ = ['font', 'n']
+        def __init__(self, font):
+            self.font = font
+            self.n = 0
+        def __next__(self):
+            if self.n < self.font.count:
+                glyph = self.font[self.n]
+                self.n += 1
+                return glyph
+            else:
+                raise StopIteration
+
+    def __iter__(self):
+        return PSF2.__iter(self)

scripts/parse_font.py

@@ -1,21 +1,6 @@
 #!/usr/bin/env python3
 
-MAGIC = (0x72, 0xb5, 0x4a, 0x86)
-
-from collections import namedtuple
-PSF2 = namedtuple("PSF2", ["version", "offset", "flags", "count", "charsize", "height", "width"])
-
-def read_header(data):
-    from struct import unpack_from, calcsize
-
-    fmt = "BBBBIIIIIII"
-
-    values = unpack_from(fmt, data)
-    if values[:len(MAGIC)] != MAGIC:
-        raise Exception("Bad magic number in header")
-
-    return PSF2(*values[len(MAGIC):])
-
+from fontpsf import PSF2
 
 def print_glyph(header, data):
     bw = (header.width + 7) // 8
@@ -28,16 +13,15 @@ def print_glyph(header, data):
 
 
 def display_font(filename):
-    data = open(filename, 'rb').read()
+    font = PSF2.load(filename)
+    print(font.header)
 
-    header = read_header(data)
-    print(header)
-
-    c = header.charsize
-    for i in range(0, header.count):
-        n = i * c + header.offset
-        print("Glyph {}:".format(i))
-        print_glyph(header, data[n:n+c])
+    for glyph in font:
+        if glyph.empty():
+            print("{}: BLANK".format(glyph.description()))
+        else:
+            print("{}:".format(glyph.description()))
+            print_glyph(font.header, glyph.data)
 
 
 if __name__ == "__main__":

scripts/parse_syms.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+
+def parse_elf(filename):
+    import struct
+    with open(filename, 'rb') as elf:
+
+if __name__ == "__main__":
+    import sys
+    for arg in sys.argv[1:]:
+        parse_elf(arg)

scripts/psf_to_cpp.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+from fontpsf import PSF2
+
+def print_header(filename):
+    font = PSF2.load(filename)
+
+    print("#pragma once")
+    print(f"// This file was autogenerated by psf_to_cpp.py from {font.filename}\n")
+
+    print(f"const uint8_t font_glyph_size = {font.charsize};")
+    print(f"const uint8_t font_glyph_width = {font.dimension[0]};")
+    print(f"const uint8_t font_glyph_height = {font.dimension[1]};")
+    print(f"const uint16_t font_glyph_count = {font.count};\n")
+
+    print('const uint8_t font_glyph_data[] = {')
+
+    for glyph in font:
+        print("    ", "".join([f"0x{b:02x}," for b in glyph.data]), end="")
+        print(" // {}".format(glyph.description()))
+
+    print("};")
+
+if __name__ == "__main__":
+    import sys
+    for filename in sys.argv[1:]:
+        print_header(filename)

scripts/readme_for_prebuilt_sysroots.md

@@ -0,0 +1,14 @@
+# jsix OS sysroot
+
+This is a pre-built sysroot for building the jsix operating system kernel,
+bootloader, and utilities. This package is provided as a convenience, and
+contains software from the following repositories.
+
+## The LLVM toolchain
+
+The LLVM sources as downloaded via git from [llvm.org][llvm] under the terms of
+the [Apache License v2.0][apache2], modified [as described here][llvmlic].
+
+[llvm]: https://llvm.org
+[apache2]: https://www.apache.org/licenses/LICENSE-2.0
+[llvmlic]: https://llvm.org/docs/DeveloperPolicy.html#new-llvm-project-license-framework

scripts/templates/build.ninja.j2

@@ -0,0 +1,214 @@
+ninja_required_version = 1.3
+builddir = {{ buildroot }}
+srcroot = {{ srcroot }}
+modulefile = {{ modulefile }}
+
+{%- for var, value in vars %}
+{{ var }} = {{ value }}
+{%- endfor %}
+
+warnflags = $
+    -Wformat=2 $
+    -Winit-self $
+    -Wfloat-equal $
+    -Winline $
+    -Wmissing-format-attribute $
+    -Wmissing-include-dirs $
+    -Wswitch $
+    -Wundef $
+    -Wdisabled-optimization $
+    -Wpointer-arith $
+    -Wno-attributes $
+    -Wno-sign-compare $
+    -Wno-multichar $
+    -Wno-div-by-zero $
+    -Wno-endif-labels $
+    -Wno-pragmas $
+    -Wno-format-extra-args $
+    -Wno-unused-result $
+    -Wno-deprecated-declarations $
+    -Wno-unused-function $
+    -Wno-address-of-packed-member $
+    -Werror
+
+ccflags = $
+    -I${srcroot}/src/include $
+    -I${srcroot}/src/include/x86_64 $
+    -fcolor-diagnostics $
+    -DVERSION_MAJOR={{ version_major }} $
+    -DVERSION_MINOR={{ version_minor }} $
+    -DVERSION_PATCH={{ version_patch }} $
+    -DVERSION_GITSHA=0x0{{ version_sha }} $
+    -DGIT_VERSION=\"{{ version }}\" $
+    -DGIT_VERSION_WIDE=L\"{{ version }}\" $
+    $warnflags
+
+asflags = $
+    -DVERSION_MAJOR={{ version_major }} $
+    -DVERSION_MINOR={{ version_minor }} $
+    -DVERSION_PATCH={{ version_patch }} $
+    -DVERSION_GITSHA=0x{{ version_sha }} $
+    -I${srcroot}/src/include
+
+cflags = -std=c11
+cxxflags = -std=c++17
+libs =
+
+rule c
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $name
+    command = $cc -MMD -MF $out.d $ccflags $cflags -o $out -c $in
+
+rule dump_c_defs
+    description = Dumping C defines for $target
+    command = echo "" | $cc $ccflags $cflags -dM -E - > $out
+
+rule dump_c_run
+    description = Dumping C arguments for $target
+    command = $
+        echo "#!/bin/bash" > $out; $
+        echo '$cc $ccflags $cflags $$*' >> $out; $
+        chmod a+x $out
+
+rule cpp
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $name
+    command = $cxx -MMD -MF $out.d $cxxflags $ccflags -o $out -c $in
+
+rule dump_cpp_defs
+    description = Dumping C++ defines for $target
+    command = echo "" | $cxx -x c++ $cxxflags $ccflags -dM -E - > $out
+
+rule dump_cpp_run
+    description = Dumping C++ arguments for $target
+    command = $
+        echo "#!/bin/bash" > $out; $
+        echo '$cc $cxxflags $ccflags $$*' >> $out; $
+        chmod a+x $out
+
+rule s
+    deps = gcc
+    depfile = $out.d
+    description = Assembling $name
+    command = $nasm -o $out -felf64 -MD $out.d $asflags $in
+
+rule exe
+    description = Linking $name
+    command = $ld $ldflags -o $out $in $libs
+
+rule lib
+    description = Archiving $name
+    command = $ar qcs $out $in
+
+rule regen
+    generator = true
+    description = Regenrating build files
+    command = $
+        {{ generator }} $
+        --file $modulefile $
+        --dir $builddir $
+        generate
+
+rule cp
+    description = Copying $name
+    command = cp $in $out
+
+rule dump
+    description = Dumping decompiled $name
+    command = objdump -DSC -M intel $in > $out
+
+rule makest
+    description = Making symbol table
+    command = nm $in | ${srcroot}/scripts/build_symbol_table.py $out
+
+rule makeefi
+    description = Converting $name
+    command = objcopy $
+        -j .text $
+        -j .sdata $
+        -j .data $
+        -j .dynamic $
+        -j .dynsym $
+        -j .rel $
+        -j .rela $
+        -j .reloc $
+        --target=efi-app-x86_64 $
+        $in $out
+
+rule makefat
+    description = Creating $name
+    command = $
+        cp $srcroot/assets/diskbase.img $out; $
+        mcopy -s -D o -i $out@@1M $builddir/fatroot/* ::/
+
+rule strip
+    description = Stripping $name
+    command = $
+        cp $in $out; $
+        objcopy --only-keep-debug $out $out.debug; $
+        strip -g $out; $
+        objcopy --add-gnu-debuglink=$out.debug $out
+
+{% for target in targets %}
+subninja {{ target }}/target.ninja
+{% endfor %}
+
+build $
+    {%- for buildfile in buildfiles %}
+    {{ buildfile }} $
+    {%- endfor %}
+    : regen | $
+    {%- for template in templates %}
+    {{ template }} $
+    {%- endfor %}
+    $modulefile $
+    {{ generator }}
+
+build $builddir/ovmf_vars.fd : cp $srcroot/assets/ovmf/x64/ovmf_vars.fd
+    name = ovmf_vars.fd
+
+build $builddir/ovmf_vars_d.fd : cp $srcroot/assets/ovmf/x64/ovmf_vars_d.fd
+    name = ovmf_vars_d.fd
+
+build $builddir/jsix.elf | $builddir/jsix.elf.debug : strip $builddir/host/jsix.elf
+    name = kernel
+
+build $builddir/jsix.dump : dump $builddir/host/jsix.elf
+    name = kernel
+
+build $builddir/jsix.elf-gdb.py : cp ${srcroot}/assets/debugging/jsix.elf-gdb.py
+    name = kernel debug python scripts
+
+build $builddir/fatroot/jsix.elf : cp $builddir/jsix.elf
+    name = kernel to FAT image
+
+build $builddir/fatroot/efi/boot/bootx64.efi : cp $builddir/boot/boot.efi
+    name = bootloader to FAT image
+
+build $builddir/fatroot/nulldrv.elf : cp $builddir/user/nulldrv.elf
+    name = null driver to FAT image
+
+build $builddir/fatroot/fb.elf : cp $builddir/user/fb.elf
+    name = fb driver to FAT image
+
+build ${builddir}/fatroot/symbol_table.dat : makest ${builddir}/jsix.elf
+
+build $builddir/jsix.img : makefat | $
+    $builddir/fatroot/symbol_table.dat $
+    $builddir/fatroot/nulldrv.elf $
+    $builddir/fatroot/fb.elf $
+    $builddir/fatroot/jsix.elf $
+    $builddir/fatroot/efi/boot/bootx64.efi
+    name = jsix.img
+
+default $
+    $builddir/ovmf_vars.fd $
+    $builddir/ovmf_vars_d.fd $
+    $builddir/jsix.dump $
+    $builddir/jsix.elf-gdb.py $
+    $builddir/jsix.img
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/exe.boot.j2

@@ -0,0 +1,14 @@
+{% extends "exe.default.j2" %}
+{% block variables %}
+{{ super() }}
+
+ccflags = $ccflags $
+    -g3 $
+    -DKERNEL_FILENAME=L\"jsix.elf\" $
+    -I${srcroot}/external/include $
+    -I${srcroot}/external/include/X64
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/exe.default.j2

@@ -0,0 +1,8 @@
+{% extends "module.base.j2" %}
+{% block variables %}
+{{ super() }}
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/exe.kernel.j2

@@ -0,0 +1,13 @@
+{% extends "exe.default.j2" %}
+{% block variables %}
+{{ super() }}
+
+asflags = $asflags -I${srcroot}/src/kernel/
+libs = $libs
+ldflags = $ldflags -T ${srcroot}/src/arch/x86_64/kernel.ld
+ccflags = $ccflags -I${srcroot}/external
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/exe.makerd.j2

@@ -0,0 +1,10 @@
+{% extends "exe.default.j2" %}
+{% block variables %}
+{{ super() }}
+
+ccflags = $ccflags -I${srcroot}/external/cpptoml
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/exe.tests.j2

@@ -0,0 +1,10 @@
+{% extends "exe.default.j2" %}
+{% block variables %}
+{{ super() }}
+
+ccflags = $ccflags -ggdb -I${srcroot}/external/catch
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/lib.default.j2

@@ -0,0 +1,4 @@
+{% extends "module.base.j2" %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/module.base.j2

@@ -0,0 +1,45 @@
+moddir = ${builddir}/{{ name }}.dir
+
+{% block variables %}
+ccflags = $ccflags $
+    {%- for dep in depmods %}
+    {%- for inc in dep.includes %}
+    -I${srcroot}/{{ inc }} $
+    {%- endfor %}
+    {%- endfor %}
+    {%- for inc in module.includes %}
+    -I${srcroot}/{{ inc }} $
+    {%- endfor %}
+    {%- for define in module.defines %}
+    -D{{ define }} $
+    {%- endfor %}
+{% endblock %}
+
+{% for source in module.source %}
+build ${moddir}/{{ source.output }} : {{ source.action }} ${srcroot}/{{ source.input }} || {{ buildfile }}
+    name = {{ source.name }}
+{% endfor %}
+
+build ${builddir}/{{ module.output }} : {{ module.kind }} $
+{%- for source in module.source %}
+    ${moddir}/{{ source.output }} $
+{%- endfor -%}
+{%- for dep in deplibs %}
+    ${builddir}/{{ dep.output }} $
+{%- endfor %}
+    | $
+{%- for dep in depexes %}
+    ${builddir}/{{ dep.output }} $
+{%- endfor %}
+    {{ buildfile }}
+    name = {{ name }}
+
+{% if module.default %}
+default ${builddir}/{{ module.output }}
+{% endif %}
+
+{% block extra %}
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/target.boot.j2

@@ -0,0 +1,38 @@
+{% extends "target.default.j2" %}
+
+{% block binaries %}
+cc = clang
+cxx = clang++
+ld = clang++
+ar = ar
+nasm = nasm
+objcopy = objcopy
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags $
+    -I $srcroot/external $
+    --target=x86_64-unknown-windows $
+	-ffreestanding $
+	-mno-red-zone $
+	-fshort-wchar $
+	-fno-omit-frame-pointer $
+	-ggdb
+
+cxxflags = $cxxflags $
+    -fno-rtti $
+    -fno-exceptions
+
+ldflags = $ldflags $
+    --target=x86_64-unknown-windows $
+	-nostdlib $
+    -Wl,-entry:efi_main $
+    -Wl,-subsystem:efi_application $
+    -fuse-ld=lld-link $
+	-g
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/target.default.j2

@@ -0,0 +1,31 @@
+builddir = $builddir/{{ target }}
+target = {{ target }}
+
+{% block variables %}
+{% endblock %}
+
+{% block binaries %}
+cc = clang
+cxx = clang++
+ld = ld
+ar = ar
+nasm = nasm
+objcopy = objcopy
+{% endblock %}
+
+{% for module in modules %}
+subninja {{ module }}.ninja
+{% endfor %}
+
+build ${builddir}/c.defs : dump_c_defs | {{ buildfile }}
+build ${builddir}/cpp.defs : dump_cpp_defs | {{ buildfile }}
+build ${builddir}/c.run : dump_c_run | {{ buildfile }}
+build ${builddir}/cpp.run : dump_cpp_run | {{ buildfile }}
+
+default ${builddir}/c.defs
+default ${builddir}/cpp.defs
+default ${builddir}/c.run
+default ${builddir}/cpp.run
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/target.host.j2

@@ -0,0 +1,44 @@
+{% extends "target.default.j2" %}
+
+{% block binaries %}
+cc = ${srcroot}/sysroot/bin/clang
+cxx = ${srcroot}/sysroot/bin/clang++
+ld = ${srcroot}/sysroot/bin/ld.lld
+ar = ${srcroot}/sysroot/bin/ar
+nasm = nasm
+objcopy = ${srcroot}/sysroot/bin/objcopy
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags $
+    -nostdlib $
+    -ffreestanding $
+    -nodefaultlibs $
+    -fno-builtin $
+    -mno-sse $
+    -fno-omit-frame-pointer $
+    -mno-red-zone $
+    -g $
+    -mcmodel=large $
+    -D__ELF__ $
+    -D__JSIX__ $
+    -isystem${srcroot}/sysroot/include $
+    -isystem${srcroot}/src/libraries/libc/include $
+    --sysroot="${srcroot}/sysroot"
+
+cxxflags = $cxxflags $
+    -fno-exceptions $
+    -fno-rtti $
+    -isystem${srcroot}/sysroot/include/c++/v1
+
+ldflags = $ldflags $
+    -g $
+    -nostdlib $
+    -Bsymbolic $
+    -Bstatic
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/target.native.j2

@@ -0,0 +1,15 @@
+{% extends "target.default.j2" %}
+
+{% block binaries %}
+{{ super() }}
+ld = clang++
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags -g -ggdb
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

scripts/templates/target.user.j2

@@ -0,0 +1,45 @@
+{% extends "target.default.j2" %}
+
+{% block binaries %}
+cc = ${srcroot}/sysroot/bin/clang
+cxx = ${srcroot}/sysroot/bin/clang++
+ld = ${srcroot}/sysroot/bin/ld.lld
+ar = ${srcroot}/sysroot/bin/ar
+nasm = nasm
+objcopy = ${srcroot}/sysroot/bin/objcopy
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags $
+    -nostdlib $
+    -nodefaultlibs $
+    -fno-builtin $
+    -mno-sse $
+    -fno-omit-frame-pointer $
+    -mno-red-zone $
+    -g $
+    -mcmodel=large $
+    -D__ELF__ $
+    -D__JSIX__ $
+    -isystem${srcroot}/sysroot/include $
+    -isystem${srcroot}/src/libraries/libc/include $
+    --sysroot="${srcroot}/sysroot"
+
+cxxflags = $cxxflags $
+    -fno-exceptions $
+    -fno-rtti $
+    -isystem${srcroot}/sysroot/include/c++/v1
+
+ldflags = $ldflags $
+    -g $
+    -nostdlib $
+    -Bsymbolic $
+    -Bstatic $
+    --sysroot="${srcroot}/sysroot" $
+	-L "${srcroot}/sysroot/lib" $
+
+{% endblock %}
+
+# vim: ft=ninja et ts=4 sts=4 sw=4
+

src/arch/x86_64/boot.ld

@@ -1,79 +0,0 @@
-/* Linker script originally from GNU-EFI project
- * https://sourceforge.net/p/gnu-efi/
- */
-
-OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
-OUTPUT_ARCH(i386:x86-64)
-ENTRY(_start)
-SECTIONS
-{
-  . = 0;
-  ImageBase = .;
-  /* .hash and/or .gnu.hash MUST come first! */
-  .hash : { *(.hash) }
-  .gnu.hash : { *(.gnu.hash) }
-  . = ALIGN(4096);
-  .eh_frame : 
-  { 
-    *(.eh_frame)
-  }
-  . = ALIGN(4096);
-  .text :
-  {
-   _text = .;
-   *(.text)
-   *(.text.*)
-   *(.gnu.linkonce.t.*)
-   . = ALIGN(16);
-  }
-  _etext = .;
-  _text_size = . - _text;
-  . = ALIGN(4096);
-  .reloc :
-  {
-   *(.reloc)
-  }
-  . = ALIGN(4096);
-  .data :
-  {
-   _data = .;
-   *(.rodata*)
-   *(.got.plt)
-   *(.got)
-   *(.data*)
-   *(.sdata)
-   /* the EFI loader doesn't seem to like a .bss section, so we stick
-      it all into .data: */
-   *(.sbss)
-   *(.scommon)
-   *(.dynbss)
-   *(.bss)
-   *(COMMON)
-   *(.rel.local)
-  }
-  .note.gnu.build-id : { *(.note.gnu.build-id) }
-
-  _edata = .;
-  _data_size = . - _etext;
-  . = ALIGN(4096);
-  .dynamic  : { *(.dynamic) }
-  . = ALIGN(4096);
-  .rela :
-  {
-    *(.rela.data*)
-    *(.rela.got)
-    *(.rela.stab)
-  }
-  . = ALIGN(4096);
-  .dynsym   : { *(.dynsym) }
-  . = ALIGN(4096);
-  .dynstr   : { *(.dynstr) }
-  . = ALIGN(4096);
-  .ignored.reloc :
-  {
-    *(.rela.reloc)
-    *(.eh_frame)
-    *(.note.GNU-stack)
-  }
-  .comment 0 : { *(.comment) }
-}

src/arch/x86_64/kernel.ld

@@ -1,8 +1,7 @@
-ENTRY(_start)
+ENTRY(_kernel_start)
 SECTIONS
 {
-	OFFSET = 0xFFFFFF0000000000;
-	. = OFFSET + 0x100000;
+	. = 0xFFFF800000000000;
 
 	.header : {
 		__header_start = .;
@@ -10,28 +9,44 @@ SECTIONS
 		__header_end = .;
 	}
 
-	.text : {
+	.text ALIGN(4096) : {
 		*(.text)
+		*(.isrs)
 	}
 
-	.data : {
+	.data ALIGN(4096) : {
 		 *(.data)
 		 *(.rodata)
 	}
 
-	.isrs : {
-		*(.isrs)
+	.ctors : ALIGN(8) {
+		 __ctors = .;
+		 KEEP(*(.ctors))
+		 __ctors_end = .;
+	 }
+
+	.bss ALIGN(4096) : {
+		__bss_start = .;
+		*(.bss)
+		__bss_end = .;
 	}
 
 	.note : {
 		*(.note.*)
 	}
 
-	.bss ALIGN(0x1000) : {
-		__bss_start = .;
-		*(.bss)
-		__bss_end = .;
+	.eh_frame : {
+		__eh_frame_start = .;
+		KEEP(*(.eh_frame))
+		__eh_frame_end = .;
 	}
 
+	.eh_frame_hdr : {
+		KEEP(*(.eh_frame_hdr))
+	}
+
+	__eh_frame_hdr_start = SIZEOF(.eh_frame_hdr) > 0 ? ADDR(.eh_frame_hdr) : 0;
+	__eh_frame_hdr_end = SIZEOF(.eh_frame_hdr) > 0 ? . : 0;
+
 	kernel_end = ALIGN(4096);
 }

src/boot/console.c

@@ -1,307 +0,0 @@
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdint.h>
-
-#include "console.h"
-#include "guids.h"
-#include "utility.h"
-
-size_t ROWS = 0;
-size_t COLS = 0;
-
-static EFI_SIMPLE_TEXT_OUT_PROTOCOL *con_out = 0;
-
-const CHAR16 digits[] = {u'0', u'1', u'2', u'3', u'4', u'5', u'6', u'7', u'8', u'9', u'a', u'b', u'c', u'd', u'e', u'f'};
-
-EFI_STATUS
-con_pick_mode(EFI_BOOT_SERVICES *bootsvc)
-{
-	EFI_STATUS status;
-	EFI_GRAPHICS_OUTPUT_PROTOCOL *gfx_out_proto;
-	status = bootsvc->LocateProtocol(&guid_gfx_out, NULL, (void **)&gfx_out_proto);
-	CHECK_EFI_STATUS_OR_RETURN(status, "LocateProtocol gfx");
-
-	const uint32_t modes = gfx_out_proto->Mode->MaxMode;
-	uint32_t best = gfx_out_proto->Mode->Mode;
-
-	EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info =
-		(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *)gfx_out_proto->Mode;
-
-	uint32_t res = info->HorizontalResolution * info->VerticalResolution;
-	int is_fb = info->PixelFormat != PixelBltOnly;
-
-	for (uint32_t i = 0; i < modes; ++i) {
-		size_t size = 0;
-		status = gfx_out_proto->QueryMode(gfx_out_proto, i, &size, &info);
-		CHECK_EFI_STATUS_OR_RETURN(status, "QueryMode");
-
-#ifdef MAX_HRES
-		if (info->HorizontalResolution > MAX_HRES) continue;
-#endif
-
-		const uint32_t new_res = info->HorizontalResolution * info->VerticalResolution;
-		const int new_is_fb = info->PixelFormat == PixelBltOnly;
-
-		if (new_is_fb > is_fb && new_res >= res) {
-			best = i;
-			res = new_res;
-		}
-	}
-
-	status = gfx_out_proto->SetMode(gfx_out_proto, best);
-	CHECK_EFI_STATUS_OR_RETURN(status, "SetMode %d/%d", best, modes);
-	return EFI_SUCCESS;
-}
-
-EFI_STATUS
-con_initialize(EFI_SYSTEM_TABLE *system_table, const CHAR16 *version)
-{
-	EFI_STATUS status;
-
-	EFI_BOOT_SERVICES *bootsvc = system_table->BootServices;
-	con_out = system_table->ConOut;
-
-	// Might not find a video device at all, so ignore not found errors
-	status = con_pick_mode(bootsvc);
-	if (status != EFI_NOT_FOUND)
-		CHECK_EFI_STATUS_OR_RETURN(status, "con_pick_mode");
-
-	status = con_out->QueryMode(con_out, con_out->Mode->Mode, &COLS, &ROWS);
-	CHECK_EFI_STATUS_OR_RETURN(status, "QueryMode");
-
-	status = con_out->ClearScreen(con_out);
-	CHECK_EFI_STATUS_OR_RETURN(status, "ClearScreen");
-
-	con_out->SetAttribute(con_out, EFI_LIGHTCYAN);
-	con_out->OutputString(con_out, (CHAR16 *)L"Popcorn loader ");
-
-	con_out->SetAttribute(con_out, EFI_LIGHTMAGENTA);
-	con_out->OutputString(con_out, (CHAR16 *)version);
-
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L" booting...\r\n\n");
-
-	return status;
-}
-
-size_t
-con_print_hex(uint32_t n)
-{
-	CHAR16 buffer[9];
-	CHAR16 *p = buffer;
-	for (int i = 7; i >= 0; --i) {
-		uint8_t nibble = (n & (0xf << (i*4))) >> (i*4);
-		*p++ = digits[nibble];
-	}
-	*p = 0;
-	con_out->OutputString(con_out, buffer);
-	return 8;
-}
-
-size_t
-con_print_long_hex(uint64_t n)
-{
-	CHAR16 buffer[17];
-	CHAR16 *p = buffer;
-	for (int i = 15; i >= 0; --i) {
-		uint8_t nibble = (n & (0xf << (i*4))) >> (i*4);
-		*p++ = digits[nibble];
-	}
-	*p = 0;
-	con_out->OutputString(con_out, buffer);
-	return 16;
-}
-
-size_t
-con_print_dec(uint32_t n)
-{
-	CHAR16 buffer[11];
-	CHAR16 *p = buffer + 10;
-	*p-- = 0;
-	do {
-		*p-- = digits[n % 10];
-		n /= 10;
-	} while (n != 0);
-
-	con_out->OutputString(con_out, ++p);
-	return 10 - (p - buffer);
-}
-
-size_t
-con_print_long_dec(uint64_t n)
-{
-	CHAR16 buffer[21];
-	CHAR16 *p = buffer + 20;
-	*p-- = 0;
-	do {
-		*p-- = digits[n % 10];
-		n /= 10;
-	} while (n != 0);
-
-	con_out->OutputString(con_out, ++p);
-	return 20 - (p - buffer);
-}
-
-size_t
-con_printf(const CHAR16 *fmt, ...)
-{
-	CHAR16 buffer[256];
-	const CHAR16 *r = fmt;
-	CHAR16 *w = buffer;
-	va_list args;
-	size_t count = 0;
-
-	va_start(args, fmt);
-
-	while (r && *r) {
-		if (*r != L'%') {
-			count++;
-			*w++ = *r++;
-			continue;
-		}
-
-		*w = 0;
-		con_out->OutputString(con_out, buffer);
-		w = buffer;
-
-		r++; // chomp the %
-
-		switch (*r++) {
-			case L'%':
-				con_out->OutputString(con_out, L"%");
-				count++;
-				break;
-
-			case L'x':
-				count += con_print_hex(va_arg(args, uint32_t));
-				break;
-
-			case L'd':
-			case L'u':
-				count += con_print_dec(va_arg(args, uint32_t));
-				break;
-
-			case L's':
-				{
-					CHAR16 *s = va_arg(args, CHAR16*);
-					count += wstrlen(s);
-					con_out->OutputString(con_out, s);
-				}
-				break;
-
-			case L'l':
-				switch (*r++) {
-					case L'x':
-						count += con_print_long_hex(va_arg(args, uint64_t));
-						break;
-
-					case L'd':
-					case L'u':
-						count += con_print_long_dec(va_arg(args, uint64_t));
-						break;
-
-					default:
-						break;
-				}
-				break;
-
-			default:
-				break;
-		}
-	}
-
-	*w = 0;
-	con_out->OutputString(con_out, buffer);
-
-	va_end(args);
-	return count;
-}
-
-void
-con_status_begin(const CHAR16 *message)
-{
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)message);
-}
-
-void
-con_status_ok()
-{
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L"[");
-	con_out->SetAttribute(con_out, EFI_GREEN);
-	con_out->OutputString(con_out, (CHAR16 *)L"  ok  ");
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L"]\r\n");
-}
-
-void
-con_status_fail(const CHAR16 *error)
-{
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L"[");
-	con_out->SetAttribute(con_out, EFI_LIGHTRED);
-	con_out->OutputString(con_out, (CHAR16 *)L"failed");
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L"]\r\n");
-
-	con_out->SetAttribute(con_out, EFI_RED);
-	con_out->OutputString(con_out, (CHAR16 *)error);
-	con_out->SetAttribute(con_out, EFI_LIGHTGRAY);
-	con_out->OutputString(con_out, (CHAR16 *)L"\r\n");
-}
-
-EFI_STATUS
-con_get_framebuffer(
-	EFI_BOOT_SERVICES *bootsvc,
-	void **buffer,
-	size_t *buffer_size,
-	uint32_t *hres,
-	uint32_t *vres,
-	uint32_t *rmask,
-	uint32_t *gmask,
-	uint32_t *bmask)
-{
-	EFI_STATUS status;
-
-	EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
-	status = bootsvc->LocateProtocol(&guid_gfx_out, NULL, (void **)&gop);
-	if (status != EFI_NOT_FOUND) {
-		CHECK_EFI_STATUS_OR_RETURN(status, "LocateProtocol gfx");
-
-		*buffer = (void *)gop->Mode->FrameBufferBase;
-		*buffer_size = gop->Mode->FrameBufferSize;
-		*hres = gop->Mode->Info->HorizontalResolution;
-		*vres = gop->Mode->Info->VerticalResolution;
-
-		switch (gop->Mode->Info->PixelFormat) {
-			case PixelRedGreenBlueReserved8BitPerColor:
-				*rmask = 0x0000ff;
-				*gmask = 0x00ff00;
-				*bmask = 0xff0000;
-				return EFI_SUCCESS;
-
-			case PixelBlueGreenRedReserved8BitPerColor:
-				*bmask = 0x0000ff;
-				*gmask = 0x00ff00;
-				*rmask = 0xff0000;
-				return EFI_SUCCESS;
-
-			case PixelBitMask:
-				*rmask = gop->Mode->Info->PixelInformation.RedMask;
-				*gmask = gop->Mode->Info->PixelInformation.GreenMask;
-				*bmask = gop->Mode->Info->PixelInformation.BlueMask;
-				return EFI_SUCCESS;
-
-			default:
-				// Not a framebuffer, fall through to zeroing out
-				// values below.
-				break;
-		}
-	}
-
-	*buffer = NULL;
-	*buffer_size = *hres = *vres = 0;
-	*rmask = *gmask = *bmask = 0;
-	return EFI_SUCCESS;
-}

src/boot/console.cpp

@@ -0,0 +1,304 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#include <uefi/types.h>
+#include <uefi/graphics.h>
+#include <uefi/protos/graphics_output.h>
+
+#include "console.h"
+#include "error.h"
+
+#ifndef GIT_VERSION_WIDE
+#define GIT_VERSION_WIDE L"no version"
+#endif
+
+namespace boot {
+
+size_t ROWS = 0;
+size_t COLS = 0;
+
+console *console::s_console = nullptr;
+
+static const wchar_t digits[] = {u'0', u'1', u'2', u'3', u'4', u'5',
+	u'6', u'7', u'8', u'9', u'a', u'b', u'c', u'd', u'e', u'f'};
+
+
+static size_t
+wstrlen(const wchar_t *s)
+{
+	size_t count = 0;
+	while (s && *s++) count++;
+	return count;
+}
+
+
+console::console(uefi::boot_services *bs, uefi::protos::simple_text_output *out) :
+	m_rows {0},
+	m_cols {0},
+	m_out {out},
+	m_fb {0, 0}
+{
+	pick_mode(bs);
+
+	try_or_raise(
+		m_out->query_mode(m_out->mode->mode, &m_cols, &m_rows),
+		L"Failed to get text output mode.");
+
+	try_or_raise(
+		m_out->clear_screen(),
+		L"Failed to clear screen");
+
+	m_out->set_attribute(uefi::attribute::light_cyan);
+	m_out->output_string(L"jsix loader ");
+
+	m_out->set_attribute(uefi::attribute::light_magenta);
+	m_out->output_string(GIT_VERSION_WIDE);
+
+	m_out->set_attribute(uefi::attribute::light_gray);
+	m_out->output_string(L" booting...\r\n");
+
+	if (m_fb.type != kernel::args::fb_type::none) {
+		wchar_t const * type = nullptr;
+		switch (m_fb.type) {
+		case kernel::args::fb_type::rgb8:
+			type = L"rgb8";
+			break;
+		case kernel::args::fb_type::bgr8:
+			type = L"bgr8";
+			break;
+		default:
+			type = L"unknown";
+		}
+
+		printf(L"Found framebuffer: %dx%d[%d] type %s @0x%x\r\n",
+			m_fb.horizontal, m_fb.vertical, m_fb.scanline, type, m_fb.phys_addr);
+	} else {
+		printf(L"No framebuffer found.\r\n");
+	}
+
+	s_console = this;
+}
+
+void
+console::pick_mode(uefi::boot_services *bs)
+{
+	uefi::status status;
+	uefi::protos::graphics_output *gfx_out_proto;
+	uefi::guid guid = uefi::protos::graphics_output::guid;
+
+	m_fb.type = kernel::args::fb_type::none;
+
+	uefi::status has_gop = bs->locate_protocol(&guid, nullptr,
+		(void **)&gfx_out_proto);
+
+	if (has_gop != uefi::status::success)
+		// No video output found, skip it
+		return;
+
+	const uint32_t modes = gfx_out_proto->mode->max_mode;
+	uint32_t best = gfx_out_proto->mode->mode;
+
+	uefi::graphics_output_mode_info *info =
+		(uefi::graphics_output_mode_info *)gfx_out_proto->mode;
+
+	uint32_t res = info->horizontal_resolution * info->vertical_resolution;
+	int pixmode = static_cast<int>(info->pixel_format);
+
+	for (uint32_t i = 0; i < modes; ++i) {
+		size_t size = 0;
+
+		try_or_raise(
+			gfx_out_proto->query_mode(i, &size, &info),
+			L"Failed to find a graphics mode the driver claimed to support");
+
+#ifdef MAX_HRES
+		if (info->horizontal_resolution > MAX_HRES) continue;
+#endif
+
+		const uint32_t new_res = info->horizontal_resolution * info->vertical_resolution;
+		int new_pixmode = static_cast<int>(info->pixel_format);
+
+		if (new_pixmode <= pixmode && new_res >= res) {
+			best = i;
+			res = new_res;
+			pixmode = new_pixmode;
+		}
+	}
+
+	try_or_raise(
+		gfx_out_proto->set_mode(best),
+		L"Failed to set graphics mode");
+
+	if (pixmode <= static_cast<int>(uefi::pixel_format::bgr8)) {
+		m_fb.phys_addr = gfx_out_proto->mode->frame_buffer_base;
+		m_fb.size = gfx_out_proto->mode->frame_buffer_size;
+		m_fb.vertical = gfx_out_proto->mode->info->vertical_resolution;
+		m_fb.horizontal = gfx_out_proto->mode->info->horizontal_resolution;
+		m_fb.scanline = gfx_out_proto->mode->info->pixels_per_scanline;
+
+		switch (gfx_out_proto->mode->info->pixel_format) {
+		case uefi::pixel_format::rgb8:
+			m_fb.type = kernel::args::fb_type::rgb8;
+			break;
+		case uefi::pixel_format::bgr8:
+			m_fb.type = kernel::args::fb_type::bgr8;
+			break;
+		default:
+			m_fb.type = kernel::args::fb_type::none;
+		}
+	}
+}
+
+size_t
+console::print_hex(uint32_t n) const
+{
+	wchar_t buffer[9];
+	wchar_t *p = buffer;
+	for (int i = 7; i >= 0; --i) {
+		uint8_t nibble = (n >> (i*4)) & 0xf;
+		*p++ = digits[nibble];
+	}
+	*p = 0;
+	m_out->output_string(buffer);
+	return 8;
+}
+
+size_t
+console::print_long_hex(uint64_t n) const
+{
+	wchar_t buffer[17];
+	wchar_t *p = buffer;
+	for (int i = 15; i >= 0; --i) {
+		uint8_t nibble = (n >> (i*4)) & 0xf;
+		*p++ = digits[nibble];
+	}
+	*p = 0;
+	m_out->output_string(buffer);
+	return 16;
+}
+
+size_t
+console::print_dec(uint32_t n) const
+{
+	wchar_t buffer[11];
+	wchar_t *p = buffer + 10;
+	*p-- = 0;
+	do {
+		*p-- = digits[n % 10];
+		n /= 10;
+	} while (n != 0);
+
+	m_out->output_string(++p);
+	return 10 - (p - buffer);
+}
+
+size_t
+console::print_long_dec(uint64_t n) const
+{
+	wchar_t buffer[21];
+	wchar_t *p = buffer + 20;
+	*p-- = 0;
+	do {
+		*p-- = digits[n % 10];
+		n /= 10;
+	} while (n != 0);
+
+	m_out->output_string(++p);
+	return 20 - (p - buffer);
+}
+
+size_t
+console::vprintf(const wchar_t *fmt, va_list args) const
+{
+	wchar_t buffer[256];
+	const wchar_t *r = fmt;
+	wchar_t *w = buffer;
+	size_t count = 0;
+
+	while (r && *r) {
+		if (*r != L'%') {
+			count++;
+			*w++ = *r++;
+			continue;
+		}
+
+		*w = 0;
+		m_out->output_string(buffer);
+		w = buffer;
+
+		r++; // chomp the %
+
+		switch (*r++) {
+			case L'%':
+				m_out->output_string(const_cast<wchar_t*>(L"%"));
+				count++;
+				break;
+
+			case L'x':
+				count += print_hex(va_arg(args, uint32_t));
+				break;
+
+			case L'd':
+			case L'u':
+				count += print_dec(va_arg(args, uint32_t));
+				break;
+
+			case L's':
+				{
+					wchar_t *s = va_arg(args, wchar_t*);
+					count += wstrlen(s);
+					m_out->output_string(s);
+				}
+				break;
+
+			case L'l':
+				switch (*r++) {
+					case L'x':
+						count += print_long_hex(va_arg(args, uint64_t));
+						break;
+
+					case L'd':
+					case L'u':
+						count += print_long_dec(va_arg(args, uint64_t));
+						break;
+
+					default:
+						break;
+				}
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	*w = 0;
+	m_out->output_string(buffer);
+	return count;
+}
+
+size_t
+console::printf(const wchar_t *fmt, ...) const
+{
+	va_list args;
+	va_start(args, fmt);
+
+	size_t result = vprintf(fmt, args);
+
+	va_end(args);
+	return result;
+}
+
+size_t
+console::print(const wchar_t *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+
+	size_t result = get().vprintf(fmt, args);
+
+	va_end(args);
+	return result;
+}
+
+} // namespace boot

src/boot/console.h

@@ -1,20 +1,45 @@
+/// \file console.h
+/// Text output handler
 #pragma once
+#include <stdarg.h>
 #include <stddef.h>
-#include <efi/efi.h>
+#include <uefi/boot_services.h>
+#include <uefi/protos/simple_text_output.h>
+#include "kernel_args.h"
+#include "types.h"
 
-EFI_STATUS con_initialize(EFI_SYSTEM_TABLE *system_table, const CHAR16 *version);
-void con_status_begin(const CHAR16 *message);
-void con_status_ok();
-void con_status_fail(const CHAR16 *error);
-size_t con_printf(const CHAR16 *fmt, ...);
+namespace boot {
 
-EFI_STATUS
-con_get_framebuffer(
-	EFI_BOOT_SERVICES *bootsvc,
-	void **buffer,
-	size_t *buffer_size,
-	uint32_t *hres,
-	uint32_t *vres,
-	uint32_t *rmask,
-	uint32_t *gmask,
-	uint32_t *bmask);
+/// Object providing basic output functionality to the UEFI console
+class console
+{
+public:
+	using framebuffer = kernel::args::framebuffer;
+
+	console(uefi::boot_services *bs, uefi::protos::simple_text_output *out);
+
+	size_t print_hex(uint32_t n) const;
+	size_t print_dec(uint32_t n) const;
+	size_t print_long_hex(uint64_t n) const;
+	size_t print_long_dec(uint64_t n) const;
+	size_t printf(const wchar_t *fmt, ...) const;
+
+	const framebuffer & fb() const { return m_fb; };
+
+	static console & get() { return *s_console; }
+	static size_t print(const wchar_t *fmt, ...);
+
+private:
+	friend class status_line;
+
+	void pick_mode(uefi::boot_services *bs);
+	size_t vprintf(const wchar_t *fmt, va_list args) const;
+
+	size_t m_rows, m_cols;
+	uefi::protos::simple_text_output *m_out;
+	framebuffer m_fb;
+
+	static console *s_console;
+};
+
+} // namespace boot

src/boot/crt0.s

@@ -1,85 +0,0 @@
-;   crt0-efi-x86_64.S - x86_64 EFI startup code.
-;   Copyright (C) 1999 Hewlett-Packard Co.
-;	Contributed by David Mosberger <davidm@hpl.hp.com>.
-;   Copyright (C) 2005 Intel Co.
-;	Contributed by Fenghua Yu <fenghua.yu@intel.com>.
-;
-;    All rights reserved.
-;
-;    Redistribution and use in source and binary forms, with or without
-;    modification, are permitted provided that the following conditions
-;    are met:
-;
-;    * Redistributions of source code must retain the above copyright
-;      notice, this list of conditions and the following disclaimer.
-;    * Redistributions in binary form must reproduce the above
-;      copyright notice, this list of conditions and the following
-;      disclaimer in the documentation and/or other materials
-;      provided with the distribution.
-;    * Neither the name of Hewlett-Packard Co. nor the names of its
-;      contributors may be used to endorse or promote products derived
-;      from this software without specific prior written permission.
-;
-;    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
-;    CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-;    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-;    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-;    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-;    BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
-;    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-;    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-;    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-;    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
-;    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-;    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-;    SUCH DAMAGE.
-;
-;	2018-05-05 Converted to NASM syntax by Justin C. Miller
-
-extern ImageBase
-extern _DYNAMIC
-extern _relocate
-extern efi_main
-
-section .text
-align 4
-
-global _start
-_start:
-	sub rsp, 8
-	push rcx
-	push rdx
-
-	; These are already in RDI/RSI from EFI calling us, right? -justin
-	;lea rdi, [ImageBase]
-	;lea rsi, [_DYNAMIC]
-
-	pop rcx
-	pop rdx
-	push rcx
-	push rdx
-	call _relocate
-
-	pop rdi
-	pop rsi
-
-	call efi_main
-	add rsp, 8
-
-.exit:	
-  	ret
-
-; hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
-section .data
-dummy:
-	dd 0
-
-
-%define IMAGE_REL_ABSOLUTE	0
-
-section .reloc
-label1:
-	dd 0							; Page RVA
- 	dd 10							; Block Size (2*4+2)
-	dw (IMAGE_REL_ABSOLUTE<<12) + 0	; reloc for dummy
-

src/boot/elf.h

@@ -1,46 +1,32 @@
+/// \file elf.h
+/// Definitions and related constants for ELF64 structures
 #pragma once
 #include <stdint.h>
 
-#ifndef ELF_VERSION
-#define ELF_VERSION 1
-#endif
+namespace boot {
+namespace elf {
 
-#ifndef ELF_WORDSIZE
-#define ELF_WORDSIZE 2
-#endif
+constexpr uint8_t version = 1;
+constexpr uint8_t word_size = 2;
+constexpr uint8_t endianness = 1;
+constexpr uint8_t os_abi = 0;
+constexpr uint16_t machine = 0x3e;
 
-#ifndef ELF_ENDIAN
-#define ELF_ENDIAN 1
-#endif
+const unsigned PT_LOAD = 1;
+const unsigned ST_PROGBITS = 1;
+const unsigned ST_NOBITS = 8;
+const unsigned long SHF_ALLOC = 0x2;
 
-#ifndef ELF_OSABI
-#define ELF_OSABI 0
-#endif
-
-#ifndef ELF_MACHINE
-#define ELF_MACHINE 0x3e
-#endif
-
-const unsigned ELF_PT_LOAD = 1;
-const unsigned ELF_ST_PROGBITS = 1;
-const unsigned ELF_ST_NOBITS = 8;
-const unsigned long ELF_SHF_ALLOC = 0x2;
-
-struct elf_ident
+struct header
 {
 	char magic[4];
 
 	uint8_t word_size;
 	uint8_t endianness;
-	uint8_t version;
+	uint8_t header_version;
 	uint8_t os_abi;
 
 	uint64_t reserved;
-} __attribute__ ((packed));
-
-struct elf_header
-{
-	struct elf_ident ident;
 
 	uint16_t type;
 	uint16_t machine;
@@ -64,7 +50,7 @@ struct elf_header
 	uint16_t sh_str_idx;
 } __attribute__ ((packed));
 
-struct elf_program_header
+struct program_header
 {
 	uint32_t type;
 	uint32_t flags;
@@ -79,7 +65,7 @@ struct elf_program_header
 	uint64_t align;
 } __attribute__ ((packed));
 
-struct elf_section_header
+struct section_header
 {
 	uint32_t name;
 	uint32_t type;
@@ -92,3 +78,6 @@ struct elf_section_header
 	uint64_t align;
 	uint64_t entry_size;
 } __attribute__ ((packed));
+
+} // namespace elf
+} // namespace boot

src/boot/error.cpp

@@ -0,0 +1,70 @@
+#include "error.h"
+#include "console.h"
+#include "kernel_args.h"
+#include "status.h"
+
+namespace boot {
+namespace error {
+
+struct error_code_desc {
+	uefi::status code;
+	const wchar_t *name;
+};
+
+struct error_code_desc error_table[] = {
+#define STATUS_ERROR(name, num) { uefi::status::name, L#name },
+#define STATUS_WARNING(name, num) { uefi::status::name, L#name },
+#include "uefi/errors.inc"
+#undef STATUS_ERROR
+#undef STATUS_WARNING
+	{ uefi::status::success, nullptr }
+};
+
+const wchar_t *
+message(uefi::status status)
+{
+	int32_t i = -1;
+	while (error_table[++i].name != nullptr) {
+		if (error_table[i].code == status) return error_table[i].name;
+	}
+
+	if (uefi::is_error(status))
+		return L"Unknown Error";
+	else
+		return L"Unknown Warning";
+}
+
+[[ noreturn ]] static void
+cpu_assert(uefi::status s, const wchar_t *message, size_t line)
+{
+	asm volatile (
+		"movq $0xeeeeeeebadbadbad, %%r8;"
+		"movq %0, %%r9;"
+		"movq %1, %%r10;"
+		"movq %2, %%r11;"
+		"movq $0, %%rdx;"
+		"divq %%rdx;"
+		:
+		: "r"((uint64_t)s), "r"(message), "r"(line)
+		: "rax", "rdx", "r8", "r9", "r10");
+	while (1) asm("hlt");
+}
+
+[[ noreturn ]] void
+raise(uefi::status status, const wchar_t *message, size_t line)
+{
+	if(status_line::fail(message, status))
+		while (1) asm("hlt");
+	else
+		cpu_assert(status, message, line);
+}
+
+
+} // namespace error
+} // namespace boot
+
+void debug_break()
+{
+	volatile int go = 0;
+	while (!go);
+}

src/boot/error.h

@@ -0,0 +1,33 @@
+/// \file error.h
+/// Error handling definitions
+#pragma once
+
+#include <stddef.h>
+#include <uefi/types.h>
+
+namespace boot {
+
+class console;
+
+namespace error {
+
+/// Halt or exit the program with the given error status/message
+[[ noreturn ]] void raise(uefi::status status, const wchar_t *message, size_t line = 0);
+
+const wchar_t * message(uefi::status status);
+
+} // namespace error
+} // namespace boot
+
+/// Debugging psuedo-breakpoint.
+void debug_break();
+
+/// Helper macro to raise an error if an operation fails.
+/// \arg s  An expression evaluating to a UEFI status
+/// \arg m  The error message to use on failure
+#define try_or_raise(s, m) \
+	do { \
+		uefi::status _s = (s); \
+		if (uefi::is_error(_s)) ::boot::error::raise(_s, (m), __LINE__); \
+	} while(0)
+

src/boot/fs.cpp

@@ -0,0 +1,114 @@
+#include <uefi/types.h>
+#include <uefi/protos/file.h>
+#include <uefi/protos/file_info.h>
+#include <uefi/protos/loaded_image.h>
+#include <uefi/protos/simple_file_system.h>
+
+#include "fs.h"
+#include "console.h"
+#include "error.h"
+#include "memory.h"
+#include "status.h"
+
+namespace boot {
+namespace fs {
+
+file::file(uefi::protos::file *f, uefi::boot_services *bs) :
+	m_file(f),
+	m_bs(bs)
+{
+}
+
+file::file(file &o) :
+	m_file(o.m_file),
+	m_bs(o.m_bs)
+{
+	o.m_file = nullptr;
+}
+
+file::file(file &&o) :
+	m_file(o.m_file),
+	m_bs(o.m_bs)
+{
+	o.m_file = nullptr;
+}
+
+file::~file()
+{
+	if (m_file)
+		m_file->close();
+}
+
+file
+file::open(const wchar_t *path)
+{
+	uefi::protos::file *fh = nullptr;
+
+	try_or_raise(
+		m_file->open(&fh, path, uefi::file_mode::read, uefi::file_attr::none),
+		L"Could not open relative path to file");
+
+	return file(fh, m_bs);
+}
+
+buffer
+file::load(uefi::memory_type mem_type)
+{
+	uint8_t info_buf[sizeof(uefi::protos::file_info) + 100];
+	size_t size = sizeof(info_buf);
+	uefi::guid info_guid = uefi::protos::file_info::guid;
+
+	try_or_raise(
+		m_file->get_info(&info_guid, &size, &info_buf),
+		L"Could not get file info");
+
+	uefi::protos::file_info *info =
+		reinterpret_cast<uefi::protos::file_info*>(&info_buf);
+
+	size_t pages = memory::bytes_to_pages(info->file_size);
+	void *data = nullptr;
+	try_or_raise(
+		m_bs->allocate_pages(
+			uefi::allocate_type::any_pages,
+			mem_type, pages, &data),
+		L"Could not allocate pages to load file");
+
+	size = info->file_size;
+	try_or_raise(
+		m_file->read(&size, data),
+		L"Could not read from file");
+
+	return { .size = size,  .data = data };
+}
+
+file
+get_boot_volume(uefi::handle image, uefi::boot_services *bs)
+{
+	status_line status(L"Looking up boot volume");
+
+	const uefi::guid le_guid = uefi::protos::loaded_image::guid;
+	uefi::protos::loaded_image *loaded_image = nullptr;
+
+	try_or_raise(
+		bs->handle_protocol(image, &le_guid,
+			reinterpret_cast<void**>(&loaded_image)),
+		L"Could not find currently running UEFI loaded image");
+
+	const uefi::guid sfs_guid = uefi::protos::simple_file_system::guid;
+	uefi::protos::simple_file_system *fs;
+	try_or_raise(
+		bs->handle_protocol(loaded_image->device_handle, &sfs_guid,
+			reinterpret_cast<void**>(&fs)),
+		L"Could not find filesystem protocol for boot volume");
+
+	uefi::protos::file *f;
+	try_or_raise(
+		fs->open_volume(&f),
+		L"Could not open the boot volume");
+
+	return file(f, bs);
+}
+
+} // namespace fs
+} // namespace boot
+

src/boot/fs.h

@@ -0,0 +1,45 @@
+/// \file fs.h
+/// Definitions for dealing with UEFI's disk access functions
+#pragma once
+
+#include <uefi/types.h>
+#include <uefi/boot_services.h>
+#include <uefi/protos/file.h>
+#include "types.h"
+
+namespace boot {
+namespace fs {
+
+/// A file or directory in a filesystem.
+class file
+{
+public:
+	file(file &&o);
+	file(file &o);
+	~file();
+
+	/// Open another file or directory, relative to this one.
+	/// \arg path  Relative path to the target file from this one
+	file open(const wchar_t *path);
+
+	/// Load the contents of this file into memory.
+	/// \arg mem_type  The UEFI memory type to use for allocation
+	/// \returns       A buffer describing the loaded memory. The
+	///                memory will be page-aligned.
+	buffer load(uefi::memory_type mem_type = uefi::memory_type::loader_data);
+
+private:
+	friend file get_boot_volume(uefi::handle, uefi::boot_services*);
+
+	file(uefi::protos::file *f, uefi::boot_services *bs);
+
+	uefi::protos::file *m_file;
+	uefi::boot_services *m_bs;
+};
+
+/// Get the filesystem this loader was loaded from.
+/// \returns  A `file` object representing the root directory of the volume
+file get_boot_volume(uefi::handle image, uefi::boot_services *bs);
+
+} // namespace fs
+} // namespace boot

src/boot/guids.c

@@ -1,13 +0,0 @@
-#include "guids.h"
-
-#define GUID(dw, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8, name) \
-	EFI_GUID name __attribute__((section(".rodata"))) = {dw, w1, w2, {b1, b2, b3, b4, b5, b6, b7, b8}}
-#include "guids.inc"
-#undef GUID
-
-int is_guid(EFI_GUID *a, EFI_GUID *b)
-{
-	uint64_t *ai = (uint64_t *)a;
-	uint64_t *bi = (uint64_t *)b;
-	return ai[0] == bi[0] && ai[1] == bi[1];
-}

src/boot/guids.h

@@ -1,8 +0,0 @@
-#pragma once
-#include <efi/efi.h>
-
-int is_guid(EFI_GUID *a, EFI_GUID *b);
-
-#define GUID(dw, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8, name) extern EFI_GUID name
-#include "guids.inc"
-#undef GUID

src/boot/guids.inc

@@ -1,7 +0,0 @@
-GUID(0xeb9d2d30,0x2d88,0x11d3,0x9a,0x16,0x00,0x90,0x27,0x3f,0xc1,0x4d, guid_acpi1);
-GUID(0x8868e871,0xe4f1,0x11d3,0xbc,0x22,0x00,0x80,0xc7,0x3c,0x88,0x81, guid_acpi2);
-GUID(0x09576e92,0x6d3f,0x11d2,0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b, guid_file_info);
-GUID(0x9042a9de,0x23dc,0x4a38,0x96,0xfb,0x7a,0xde,0xd0,0x80,0x51,0x6a, guid_gfx_out);
-GUID(0x964e5b22,0x6459,0x11d2,0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b, guid_simple_filesystem);
-
-// vim: ft=c

src/boot/hardware.cpp

@@ -0,0 +1,81 @@
+#include "hardware.h"
+#include "console.h"
+#include "error.h"
+#include "status.h"
+
+namespace boot {
+namespace hw {
+
+void *
+find_acpi_table(uefi::system_table *st)
+{
+	status_line status(L"Searching for ACPI table");
+
+	// Find ACPI tables. Ignore ACPI 1.0 if a 2.0 table is found.
+	uintptr_t acpi1_table = 0;
+
+	for (size_t i = 0; i < st->number_of_table_entries; ++i) {
+		uefi::configuration_table *table = &st->configuration_table[i];
+
+		// If we find an ACPI 2.0 table, return it immediately
+		if (table->vendor_guid == uefi::vendor_guids::acpi2)
+			return table->vendor_table;
+
+		if (table->vendor_guid == uefi::vendor_guids::acpi1) {
+			// Mark a v1 table with the LSB high
+			acpi1_table = reinterpret_cast<uintptr_t>(table->vendor_table);
+			acpi1_table |= 1;
+		}
+	}
+
+	if (!acpi1_table) {
+		error::raise(uefi::status::not_found, L"Could not find ACPI table");
+	} else if (acpi1_table & 1) {
+		status_line::warn(L"Only found ACPI 1.0 table");
+	}
+
+	return reinterpret_cast<void*>(acpi1_table);
+}
+
+static uint64_t
+rdmsr(uint32_t addr)
+{
+	uint32_t low, high;
+	__asm__ __volatile__ ("rdmsr" : "=a"(low), "=d"(high) : "c"(addr));
+	return (static_cast<uint64_t>(high) << 32) | low;
+}
+
+static void
+wrmsr(uint32_t addr, uint64_t value)
+{
+	uint32_t low = value & 0xffffffff;
+	uint32_t high = value >> 32;
+	__asm__ __volatile__ ("wrmsr" :: "c"(addr), "a"(low), "d"(high));
+}
+
+
+void
+setup_control_regs()
+{
+	uint64_t cr4 = 0;
+	asm volatile ( "mov %%cr4, %0" : "=r" (cr4) );
+	cr4 |=
+		0x000080 | // Enable global pages
+		0x000200 | // Enable FXSAVE/FXRSTOR
+		0x010000 | // Enable FSGSBASE
+		0x020000 | // Enable PCIDs
+		0;
+	asm volatile ( "mov %0, %%cr4" :: "r" (cr4) );
+
+	// Set up IA32_EFER
+	constexpr uint32_t IA32_EFER = 0xC0000080;
+	uint64_t efer = rdmsr(IA32_EFER);
+	efer |=
+		0x0001 | // Enable SYSCALL
+		0x0800 | // Enable NX bit
+		0;
+	wrmsr(IA32_EFER, efer);
+}
+
+} // namespace hw
+} // namespace boot

src/boot/hardware.h

@@ -0,0 +1,20 @@
+/// \file hardware.h
+/// Functions and definitions for detecting and dealing with hardware
+#pragma once
+
+#include <uefi/tables.h>
+
+namespace boot {
+namespace hw {
+
+/// Find the ACPI table in the system configuration tables
+/// and return a pointer to it. If only an ACPI 1.0 table is
+/// available, the returned pointer will have its least
+/// significant bit set to 1.
+void * find_acpi_table(uefi::system_table *st);
+
+/// Enable CPU options in CR4 etc for the kernel starting state.
+void setup_control_regs();
+
+} // namespace hw
+} // namespace boot

src/boot/loader.c

@@ -1,238 +0,0 @@
-#include "elf.h"
-#include "guids.h"
-#include "loader.h"
-#include "memory.h"
-#include "utility.h"
-
-#define PAGE_SIZE 0x1000
-
-static CHAR16 kernel_name[] = KERNEL_FILENAME;
-static CHAR16 font_name[] = KERNEL_FONT;
-
-EFI_STATUS
-loader_alloc_pages(
-	EFI_BOOT_SERVICES *bootsvc,
-	EFI_MEMORY_TYPE mem_type,
-	size_t *length,
-	void **pages)
-{
-	EFI_STATUS status;
-
-	size_t page_count = ((*length - 1) / PAGE_SIZE) + 1;
-	EFI_PHYSICAL_ADDRESS addr = (EFI_PHYSICAL_ADDRESS)*pages;
-
-	status = bootsvc->AllocatePages(AllocateAddress, mem_type, page_count, &addr);
-	if (status == EFI_NOT_FOUND || status == EFI_OUT_OF_RESOURCES) {
-		// couldn't get the address we wanted, try loading the kernel anywhere
-		status =
-			bootsvc->AllocatePages(AllocateAnyPages, mem_type, page_count, &addr);
-	}
-	CHECK_EFI_STATUS_OR_RETURN(status,
-		L"Allocating %d kernel pages type %x",
-		page_count, mem_type);
-
-	*length = page_count * PAGE_SIZE;
-	*pages = (void *)addr;
-
-	return EFI_SUCCESS;
-}
-
-EFI_STATUS
-loader_load_font(
-	EFI_BOOT_SERVICES *bootsvc,
-	EFI_FILE_PROTOCOL *root,
-	struct loader_data *data)
-{
-	EFI_STATUS status;
-
-	EFI_FILE_PROTOCOL *file = NULL;
-	status = root->Open(root, &file, (CHAR16 *)font_name, EFI_FILE_MODE_READ,
-						EFI_FILE_READ_ONLY | EFI_FILE_HIDDEN | EFI_FILE_SYSTEM);
-
-	if (status == EFI_NOT_FOUND)
-		return status;
-
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Opening file %s", font_name);
-
-	char info[sizeof(EFI_FILE_INFO) + 100];
-	size_t info_length = sizeof(info);
-
-	status = file->GetInfo(file, &guid_file_info, &info_length, info);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Getting file info");
-
-	data->font_length = ((EFI_FILE_INFO *)info)->FileSize;
-
-	status = loader_alloc_pages(
-			bootsvc,
-			KERNEL_FONT_MEMTYPE,
-			&data->font_length,
-			&data->font);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Allocating pages");
-
-	status = file->Read(file, &data->font_length, data->font);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Reading file");
-
-	status = file->Close(file);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Closing file handle");
-
-	return EFI_SUCCESS;
-}
-
-
-EFI_STATUS
-loader_load_elf(
-	EFI_BOOT_SERVICES *bootsvc,
-	EFI_FILE_PROTOCOL *root,
-	struct loader_data *data)
-{
-	EFI_STATUS status;
-
-	EFI_FILE_PROTOCOL *file = NULL;
-	status = root->Open(root, &file, (CHAR16 *)kernel_name, EFI_FILE_MODE_READ,
-						EFI_FILE_READ_ONLY | EFI_FILE_HIDDEN | EFI_FILE_SYSTEM);
-
-	if (status == EFI_NOT_FOUND)
-		return status;
-
-	uint64_t length = 0;
-	data->kernel = 0;
-	data->kernel_entry = 0;
-	data->kernel_length = 0;
-
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Opening file %s", kernel_name);
-
-	struct elf_header header;
-
-	length = sizeof(struct elf_header);
-	status = file->Read(file, &length, &header);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Reading ELF header");
-
-	if (length < sizeof(struct elf_header))
-		CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"Incomplete read of ELF header");
-
-	static const char expected[] = {0x7f, 'E', 'L', 'F'};
-	for (int i = 0; i < sizeof(expected); ++i) {
-		if (header.ident.magic[i] != expected[i])
-			CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"Bad ELF magic number");
-	}
-
-	if (header.ident.word_size != ELF_WORDSIZE)
-		CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"ELF load error: 32 bit ELF not supported");
-
-	if (header.ph_entsize != sizeof(struct elf_program_header))
-		CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"ELF load error: program header size mismatch");
-
-	if (header.ident.version != ELF_VERSION ||
-		header.version != ELF_VERSION)
-		CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"ELF load error: wrong ELF version");
-
-	if (header.ident.endianness != 1 ||
-		header.ident.os_abi != 0 ||
-		header.machine != 0x3e)
-		CHECK_EFI_STATUS_OR_RETURN(EFI_LOAD_ERROR, L"ELF load error: wrong machine architecture");
-
-	data->kernel_entry = (void *)header.entrypoint;
-
-	struct elf_program_header prog_header;
-	for (int i = 0; i < header.ph_num; ++i) {
-		status = file->SetPosition(file, header.ph_offset + i * header.ph_entsize);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"Setting ELF file position");
-
-		length = header.ph_entsize;
-		status = file->Read(file, &length, &prog_header);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"Reading ELF program header");
-
-		if (prog_header.type != ELF_PT_LOAD) continue;
-
-		length = prog_header.mem_size;
-		void *addr = (void *)(prog_header.vaddr - KERNEL_VIRT_ADDRESS);
-		status = loader_alloc_pages(bootsvc, KERNEL_MEMTYPE, &length, &addr);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"Allocating kernel pages");
-
-		if (data->kernel == 0)
-			data->kernel = addr;
-		data->kernel_length = (uint64_t)addr + length - (uint64_t)data->kernel;
-	}
-
-	struct elf_section_header sec_header;
-	for (int i = 0; i < header.sh_num; ++i) {
-		status = file->SetPosition(file, header.sh_offset + i * header.sh_entsize);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"Setting ELF file position");
-
-		length = header.sh_entsize;
-		status = file->Read(file, &length, &sec_header);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"Reading ELF section header");
-
-		if ((sec_header.flags & ELF_SHF_ALLOC) == 0) continue;
-
-		void *addr = (void *)(sec_header.addr - KERNEL_VIRT_ADDRESS);
-
-		if (sec_header.type == ELF_ST_PROGBITS) {
-			status = file->SetPosition(file, sec_header.offset);
-			CHECK_EFI_STATUS_OR_RETURN(status, L"Setting ELF file position");
-
-			length = sec_header.size;
-			status = file->Read(file, &length, addr);
-			CHECK_EFI_STATUS_OR_RETURN(status, L"Reading file");
-		} else if (sec_header.type == ELF_ST_NOBITS) {
-			bootsvc->SetMem(addr, sec_header.size, 0);
-		}
-	}
-
-	status = file->Close(file);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"Closing file handle");
-
-	return EFI_SUCCESS;
-}
-
-
-EFI_STATUS
-loader_load_kernel(
-	EFI_BOOT_SERVICES *bootsvc,
-	struct loader_data *data)
-{
-	if (data == NULL)
-		CHECK_EFI_STATUS_OR_RETURN(EFI_INVALID_PARAMETER, L"NULL loader_data");
-
-	EFI_STATUS status;
-	EFI_HANDLE *handles = NULL;
-	size_t handleCount = 0;
-
-	status = bootsvc->LocateHandleBuffer(ByProtocol, &guid_simple_filesystem, NULL, &handleCount, &handles);
-	CHECK_EFI_STATUS_OR_RETURN(status, L"LocateHandleBuffer");
-
-	for (unsigned i = 0; i < handleCount; ++i) {
-		EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *fileSystem = NULL;
-
-		status = bootsvc->HandleProtocol(handles[i], &guid_simple_filesystem, (void **)&fileSystem);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"HandleProtocol");
-
-		EFI_FILE_PROTOCOL *root = NULL;
-		status = fileSystem->OpenVolume(fileSystem, &root);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"OpenVolume");
-
-		status = loader_load_elf(bootsvc, root, data);
-		if (status == EFI_NOT_FOUND)
-			continue;
-
-		CHECK_EFI_STATUS_OR_RETURN(status, L"loader_load_elf: %s", kernel_name);
-
-		data->font = (void *)((uint64_t)data->kernel + data->kernel_length);
-		status = loader_load_font(bootsvc, root, data);
-
-		CHECK_EFI_STATUS_OR_RETURN(status, L"loader_load_file: %s", font_name);
-
-		data->data = (void *)((uint64_t)data->font + data->font_length);
-		data->data_length += PAGE_SIZE; // extra page for map growth
-		status = loader_alloc_pages(
-				bootsvc,
-				KERNEL_DATA_MEMTYPE,
-				&data->data_length,
-				&data->data);
-		CHECK_EFI_STATUS_OR_RETURN(status, L"loader_alloc_pages: kernel data");
-
-		return EFI_SUCCESS;
-	}
-
-	return EFI_NOT_FOUND;
-}

src/boot/loader.cpp

@@ -0,0 +1,117 @@
+#include <uefi/boot_services.h>
+#include <uefi/types.h>
+
+#include "loader.h"
+#include "console.h"
+#include "elf.h"
+#include "error.h"
+#include "fs.h"
+#include "memory.h"
+#include "paging.h"
+#include "status.h"
+
+namespace args = kernel::args;
+
+namespace boot {
+namespace loader {
+
+buffer
+load_file(
+	fs::file &disk,
+	const wchar_t *name,
+	const wchar_t *path,
+	uefi::memory_type type)
+{
+	status_line status(L"Loading file", name);
+
+	fs::file file = disk.open(path);
+	buffer b = file.load(type);
+
+	//console::print(L"    Loaded at: 0x%lx, %d bytes\r\n", b.data, b.size);
+	return b;
+}
+
+
+static bool
+is_elfheader_valid(const elf::header *header)
+{
+	return
+		header->magic[0] == 0x7f &&
+		header->magic[1] == 'E' &&
+		header->magic[2] == 'L' &&
+		header->magic[3] == 'F' &&
+		header->word_size == elf::word_size &&
+		header->endianness == elf::endianness &&
+		header->os_abi == elf::os_abi &&
+		header->machine == elf::machine &&
+		header->header_version == elf::version;
+}
+
+void
+load_program(
+	args::program &program,
+	const wchar_t *name,
+	buffer data,
+	uefi::boot_services *bs)
+{
+	status_line status(L"Loading program:", name);
+	const elf::header *header = reinterpret_cast<const elf::header*>(data.data);
+
+	if (data.size < sizeof(elf::header) || !is_elfheader_valid(header))
+		error::raise(uefi::status::load_error, L"ELF file not valid");
+
+	uintptr_t prog_base = uintptr_t(-1);
+	uintptr_t prog_end = 0;
+
+	for (int i = 0; i < header->ph_num; ++i) {
+		ptrdiff_t offset = header->ph_offset + i * header->ph_entsize;
+		const elf::program_header *pheader =
+			offset_ptr<elf::program_header>(data.data, offset);
+
+		if (pheader->type != elf::PT_LOAD)
+			continue;
+
+		uintptr_t end = pheader->vaddr + pheader->mem_size;
+		if (pheader->vaddr < prog_base) prog_base = pheader->vaddr;
+		if (end > prog_end) prog_end = end;
+	}
+
+	size_t total_size = prog_end - prog_base;
+	size_t num_pages = memory::bytes_to_pages(total_size);
+	void *pages = nullptr;
+
+	try_or_raise(
+		bs->allocate_pages(uefi::allocate_type::any_pages,
+			uefi::memory_type::loader_data, num_pages, &pages),
+		L"Failed allocating space for program");
+
+	bs->set_mem(pages, total_size, 0);
+
+	program.base = prog_base;
+	program.total_size = total_size;
+	program.num_sections = 0;
+	for (int i = 0; i < header->ph_num; ++i) {
+		ptrdiff_t offset = header->ph_offset + i * header->ph_entsize;
+		const elf::program_header *pheader =
+			offset_ptr<elf::program_header>(data.data, offset);
+
+		if (pheader->type != elf::PT_LOAD)
+			continue;
+
+		args::program_section &section = program.sections[program.num_sections++];
+
+		void *src_start = offset_ptr<void>(data.data, pheader->offset);
+		void *dest_start = offset_ptr<void>(pages, pheader->vaddr - prog_base);
+
+		bs->copy_mem(dest_start, src_start, pheader->file_size);
+		section.phys_addr = reinterpret_cast<uintptr_t>(dest_start);
+		section.virt_addr = pheader->vaddr;
+		section.size = pheader->mem_size;
+		section.type = static_cast<args::section_flags>(pheader->flags);
+	}
+
+	program.entrypoint = header->entrypoint;
+}
+
+} // namespace loader
+} // namespace boot

src/boot/loader.h

@@ -1,51 +1,41 @@
+/// \file loader.h
+/// Definitions for loading the kernel into memory
 #pragma once
-#include <efi/efi.h>
-#include <stddef.h>
 
-#define PAGE_SIZE 0x1000
+#include <uefi/boot_services.h>
 
-#ifndef KERNEL_PHYS_ADDRESS
-#define KERNEL_PHYS_ADDRESS 0x100000
-#endif
+#include "kernel_args.h"
+#include "memory.h"
+#include "types.h"
 
-#ifndef KERNEL_VIRT_ADDRESS
-#define KERNEL_VIRT_ADDRESS 0xFFFFFF0000000000
-#endif
+namespace boot {
 
-#ifndef KERNEL_MEMTYPE
-#define KERNEL_MEMTYPE 0x80000000
-#endif
+namespace fs { class file; }
 
-#ifndef KERNEL_FONT_MEMTYPE
-#define KERNEL_FONT_MEMTYPE 0x80000001
-#endif
+namespace loader {
 
-#ifndef KERNEL_DATA_MEMTYPE
-#define KERNEL_DATA_MEMTYPE 0x80000002
-#endif
+/// Load a file from disk into memory.
+/// \arg disk  The opened UEFI filesystem to load from
+/// \arg name  Name of the module (informational only)
+/// \arg path  Path on `disk` of the file to load
+/// \arg type  Memory type to use for allocation
+buffer
+load_file(
+	fs::file &disk,
+	const wchar_t *name,
+	const wchar_t *path,
+	uefi::memory_type type = uefi::memory_type::loader_data);
 
-#ifndef KERNEL_PT_MEMTYPE
-#define KERNEL_PT_MEMTYPE 0x80000004
-#endif
+/// Parse and load an ELF file in memory into a loaded image.
+/// \arg program  The program structure to fill
+/// \arg data     Buffer of the ELF file in memory
+/// \arg bs       Boot services
+void
+load_program(
+	kernel::args::program &program,
+	const wchar_t *name,
+	buffer data,
+	uefi::boot_services *bs);
 
-#ifndef KERNEL_FILENAME
-#define KERNEL_FILENAME L"kernel.elf"
-#endif
-
-#ifndef KERNEL_FONT
-#define KERNEL_FONT L"screenfont.psf"
-#endif
-
-struct loader_data {
-	void *kernel;
-	void *kernel_entry;
-	size_t kernel_length;
-
-	void *font;
-	size_t font_length;
-
-	void *data;
-	size_t data_length;
-};
-
-EFI_STATUS loader_load_kernel(EFI_BOOT_SERVICES *bootsvc, struct loader_data *data);
+} // namespace loader
+} // namespace boot

src/boot/main.c

@@ -1,171 +0,0 @@
-#include <stdalign.h>
-#include <stddef.h>
-
-#include <efi/efi.h>
-
-#include "console.h"
-#include "guids.h"
-#include "kernel_data.h"
-#include "loader.h"
-#include "memory.h"
-#include "utility.h"
-
-#ifndef GIT_VERSION_WIDE
-#define GIT_VERSION_WIDE L"no version"
-#endif
-
-#define KERNEL_HEADER_MAGIC   0x600db007
-#define KERNEL_HEADER_VERSION 1
-
-#pragma pack(push, 1)
-struct kernel_header {
-	uint32_t magic;
-	uint16_t version;
-	uint16_t length;
-
-	uint8_t major;
-	uint8_t minor;
-	uint16_t patch;
-	uint32_t gitsha;
-};
-#pragma pack(pop)
-
-EFI_STATUS
-efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
-{
-	EFI_STATUS status;
-	EFI_BOOT_SERVICES *bootsvc = system_table->BootServices;
-	EFI_RUNTIME_SERVICES *runsvc = system_table->RuntimeServices;
-
-	// When checking console initialization, use CHECK_EFI_STATUS_OR_RETURN
-	// because we can't be sure if the console was fully set up
-	status = con_initialize(system_table, GIT_VERSION_WIDE);
-	CHECK_EFI_STATUS_OR_RETURN(status, "con_initialize");
-	// From here on out, we can use CHECK_EFI_STATUS_OR_FAIL instead
-
-	memory_init_pointer_fixup(bootsvc, runsvc);
-
-	// Find ACPI tables. Ignore ACPI 1.0 if a 2.0 table is found.
-	//
-	void *acpi_table = NULL;
-	for (size_t i=0; i<system_table->NumberOfTableEntries; ++i) {
-		EFI_CONFIGURATION_TABLE *efi_table = &system_table->ConfigurationTable[i];
-		if (is_guid(&efi_table->VendorGuid, &guid_acpi2)) {
-			acpi_table = efi_table->VendorTable;
-			break;
-		} else if (is_guid(&efi_table->VendorGuid, &guid_acpi1)) {
-			// Mark a v1 table with the LSB high
-			acpi_table = (void *)((intptr_t)efi_table->VendorTable | 0x1);
-		}
-	}
-
-	// Compute necessary number of data pages
-	//
-	size_t data_length = 0;
-	status = memory_get_map_length(bootsvc, &data_length);
-	CHECK_EFI_STATUS_OR_FAIL(status);
-
-	size_t header_size = sizeof(struct popcorn_data);
-	const size_t header_align = alignof(struct popcorn_data);
-	if (header_size % header_align)
-		header_size += header_align - (header_size % header_align);
-
-	data_length += header_size;
-
-
-	// Load the kernel image from disk and check it
-	//
-	con_printf(L"Loading kernel into memory...\r\n");
-
-	struct loader_data load;
-	load.data_length = data_length;
-	status = loader_load_kernel(bootsvc, &load);
-	CHECK_EFI_STATUS_OR_FAIL(status);
-
-	con_printf(L"    image bytes at 0x%x : %x\r\n", load.kernel, load.kernel_length);
-	con_printf(L"     font bytes at 0x%x : %x\r\n", load.font, load.font_length);
-	con_printf(L"     data bytes at 0x%x : %x\r\n", load.data, load.data_length);
-
-	struct kernel_header *version = (struct kernel_header *)load.kernel;
-	if (version->magic != KERNEL_HEADER_MAGIC) {
-		con_printf(L"    bad magic %x\r\n", version->magic);
-		CHECK_EFI_STATUS_OR_FAIL(EFI_CRC_ERROR);
-	}
-
-	con_printf(L"    Kernel version %d.%d.%d %x%s\r\n",
-			version->major, version->minor, version->patch, version->gitsha & 0x0fffffff,
-			version->gitsha & 0xf0000000 ? "*" : "");
-	con_printf(L"    Entrypoint 0x%x\r\n", load.kernel_entry);
-
-	void (*kernel_main)() = load.kernel_entry;
-	memory_mark_pointer_fixup((void **)&kernel_main);
-
-	// Set up the kernel data pages to pass to the kernel
-	//
-	struct popcorn_data *data_header = (struct popcorn_data *)load.data; 
-	memory_mark_pointer_fixup((void **)&data_header);
-
-	data_header->magic = DATA_HEADER_MAGIC;
-	data_header->version = DATA_HEADER_VERSION;
-	data_header->length = sizeof(struct popcorn_data);
-
-	data_header->flags = 0;
-
-	data_header->font = load.font;
-	data_header->font_length = load.font_length;
-	memory_mark_pointer_fixup((void **)&data_header->font);
-
-	data_header->data = load.data;
-	data_header->data_length = load.data_length;
-	memory_mark_pointer_fixup((void **)&data_header->data);
-
-	data_header->memory_map = (EFI_MEMORY_DESCRIPTOR *)(data_header + 1);
-	memory_mark_pointer_fixup((void **)&data_header->memory_map);
-
-	data_header->runtime = runsvc;
-	memory_mark_pointer_fixup((void **)&data_header->runtime);
-
-	data_header->acpi_table = acpi_table;
-	memory_mark_pointer_fixup((void **)&data_header->acpi_table);
-
-	data_header->_reserved0 = 0;
-	data_header->_reserved1 = 0;
-
-	// Figure out the framebuffer (if any) and add that to the data header
-	//
-	status = con_get_framebuffer(
-			bootsvc, 
-			&data_header->frame_buffer,
-			&data_header->frame_buffer_length,
-			&data_header->hres,
-			&data_header->vres,
-			&data_header->rmask,
-			&data_header->gmask,
-			&data_header->bmask);
-	CHECK_EFI_STATUS_OR_FAIL(status);
-	memory_mark_pointer_fixup((void **)&data_header->frame_buffer);
-
-	// Save the memory map and tell the firmware we're taking control.
-	//
-	struct memory_map map;
-	map.entries = data_header->memory_map;
-	map.length = (load.data_length - header_size);
-
-	status = memory_get_map(bootsvc, &map);
-	CHECK_EFI_STATUS_OR_FAIL(status);
-
-	data_header->memory_map_length = map.length;
-	data_header->memory_map_desc_size = map.size;
-
-	// bootsvc->Stall(5000000);
-
-	status = bootsvc->ExitBootServices(image_handle, map.key);
-	CHECK_EFI_STATUS_OR_ASSERT(status, 0);
-
-	memory_virtualize(runsvc, &map);
-
-	// Hand control to the kernel
-	//
-	kernel_main(data_header);
-	return EFI_LOAD_ERROR;
-}

src/boot/main.cpp

@@ -0,0 +1,213 @@
+#include <uefi/types.h>
+#include <uefi/guid.h>
+#include <uefi/tables.h>
+#include <uefi/protos/simple_text_output.h>
+
+#include <stdalign.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "console.h"
+#include "cpu/cpu.h"
+#include "error.h"
+#include "fs.h"
+#include "hardware.h"
+#include "loader.h"
+#include "memory.h"
+#include "paging.h"
+#include "status.h"
+
+#include "kernel_args.h"
+
+namespace kernel {
+#include "kernel_memory.h"
+}
+
+namespace args = kernel::args;
+
+namespace boot {
+
+constexpr int max_modules = 5; // Max modules to allocate room for
+constexpr int max_programs = 5; // Max programs to allocate room for
+
+struct program_desc
+{
+	const wchar_t *name;
+	const wchar_t *path;
+};
+
+const program_desc program_list[] = {
+	{L"kernel", L"jsix.elf"},
+	{L"null driver", L"nulldrv.elf"},
+	{L"fb driver", L"fb.elf"},
+};
+
+/// Change a pointer to point to the higher-half linear-offset version
+/// of the address it points to.
+template <typename T>
+void change_pointer(T *&pointer)
+{
+	pointer = offset_ptr<T>(pointer, kernel::memory::page_offset);
+}
+
+/// Allocate space for kernel args. Allocates enough space from pool
+/// memory for the args header and the module and program headers.
+args::header *
+allocate_args_structure(
+	uefi::boot_services *bs,
+	size_t max_modules,
+	size_t max_programs)
+{
+	status_line status {L"Setting up kernel args memory"};
+
+	args::header *args = nullptr;
+
+	size_t args_size =
+		sizeof(args::header) + // The header itself
+		max_modules * sizeof(args::module) +  // The module structures
+		max_programs * sizeof(args::program); // The program structures
+
+	try_or_raise(
+		bs->allocate_pool(uefi::memory_type::loader_data, args_size,
+			reinterpret_cast<void**>(&args)),
+		L"Could not allocate argument memory");
+
+	bs->set_mem(args, args_size, 0);
+
+	args->modules =
+		reinterpret_cast<args::module*>(args + 1);
+	args->num_modules = 0;
+
+	args->programs =
+		reinterpret_cast<args::program*>(args->modules + max_modules);
+	args->num_programs = 0;
+
+	return args;
+}
+
+/// Add a module to the kernel args list
+inline void
+add_module(args::header *args, args::mod_type type, buffer &data)
+{
+	args::module &m = args->modules[args->num_modules++];
+	m.type = type;
+	m.location = data.data;
+	m.size = data.size;
+}
+
+/// Check that all required cpu features are supported
+void
+check_cpu_supported()
+{
+	status_line status {L"Checking CPU features"};
+
+	cpu::cpu_id cpu;
+	uint64_t missing = cpu.missing();
+	if (missing) {
+#define CPU_FEATURE_OPT(...)
+#define CPU_FEATURE_REQ(name, ...) \
+		if (!cpu.has_feature(cpu::feature::name)) { \
+			status::fail(L"CPU required feature " L ## #name, uefi::status::unsupported); \
+		}
+#include "cpu/features.inc"
+#undef CPU_FEATURE_REQ
+#undef CPU_FEATURE_OPT
+
+		error::raise(uefi::status::unsupported, L"CPU not supported");
+	}
+}
+
+/// The main procedure for the portion of the loader that runs while
+/// UEFI is still in control of the machine. (ie, while the loader still
+/// has access to boot services.
+args::header *
+uefi_preboot(uefi::handle image, uefi::system_table *st)
+{
+	status_line status {L"Performing UEFI pre-boot"};
+
+	uefi::boot_services *bs = st->boot_services;
+	uefi::runtime_services *rs = st->runtime_services;
+	memory::init_pointer_fixup(bs, rs);
+
+	args::header *args =
+		allocate_args_structure(bs, max_modules, max_programs);
+
+	args->magic = args::magic;
+	args->version = args::version;
+	args->runtime_services = rs;
+	args->acpi_table = hw::find_acpi_table(st);
+	paging::allocate_tables(args, bs);
+
+	memory::mark_pointer_fixup(&args->runtime_services);
+
+	fs::file disk = fs::get_boot_volume(image, bs);
+
+	buffer symbols = loader::load_file(disk, L"symbol table", L"symbol_table.dat",
+				uefi::memory_type::loader_data);
+	add_module(args, args::mod_type::symbol_table, symbols);
+
+	for (auto &desc : program_list) {
+		buffer buf = loader::load_file(disk, desc.name, desc.path);
+		args::program &program = args->programs[args->num_programs++];
+		loader::load_program(program, desc.name, buf, bs);
+	}
+
+	return args;
+}
+
+memory::efi_mem_map
+uefi_exit(args::header *args, uefi::handle image, uefi::boot_services *bs)
+{
+	status_line status {L"Exiting UEFI", nullptr, false};
+
+	memory::efi_mem_map map =
+		memory::build_kernel_mem_map(args, bs);
+
+	try_or_raise(
+		bs->exit_boot_services(image, map.key),
+		L"Failed to exit boot services");
+
+	return map;
+}
+
+} // namespace boot
+
+/// The UEFI entrypoint for the loader.
+extern "C" uefi::status
+efi_main(uefi::handle image, uefi::system_table *st)
+{
+	using namespace boot;
+	console con(st->boot_services, st->con_out);
+	check_cpu_supported();
+
+	args::header *args = uefi_preboot(image, st);
+	memory::efi_mem_map map = uefi_exit(args, image, st->boot_services);
+
+	args->video = con.fb();
+	status_bar status {con.fb()}; // Switch to fb status display
+
+	// Map the kernel to the appropriate address
+	args::program &kernel = args->programs[0];
+	for (auto &section : kernel.sections)
+		if (section.size)
+			paging::map_section(args, section);
+
+	memory::fix_frame_blocks(args);
+
+	kernel::entrypoint kentry =
+		reinterpret_cast<kernel::entrypoint>(kernel.entrypoint);
+	status.next();
+
+
+	hw::setup_control_regs();
+	memory::virtualize(args->pml4, map, st->runtime_services);
+	status.next();
+
+	change_pointer(args->pml4);
+	status.next();
+
+	kentry(args);
+	debug_break();
+	return uefi::status::unsupported;
+}
+

src/boot/memory.c

@@ -1,205 +0,0 @@
-#include <stddef.h>
-
-#include "loader.h"
-#include "memory.h"
-#include "utility.h"
-
-#define INCREMENT_DESC(p, b)  (EFI_MEMORY_DESCRIPTOR*)(((uint8_t*)(p))+(b))
-
-size_t fixup_pointer_index = 0;
-void **fixup_pointers[64];
-uint64_t *new_pml4 = 0;
-
-const CHAR16 *memory_type_names[] = {
-	L"EfiReservedMemoryType",
-	L"EfiLoaderCode",
-	L"EfiLoaderData",
-	L"EfiBootServicesCode",
-	L"EfiBootServicesData",
-	L"EfiRuntimeServicesCode",
-	L"EfiRuntimeServicesData",
-	L"EfiConventionalMemory",
-	L"EfiUnusableMemory",
-	L"EfiACPIReclaimMemory",
-	L"EfiACPIMemoryNVS",
-	L"EfiMemoryMappedIO",
-	L"EfiMemoryMappedIOPortSpace",
-	L"EfiPalCode",
-	L"EfiPersistentMemory",
-};
-
-static const CHAR16 *
-memory_type_name(UINT32 value)
-{
-	if (value >= (sizeof(memory_type_names) / sizeof(CHAR16 *))) {
-		if (value == KERNEL_DATA_MEMTYPE) return L"Kernel Data";
-		else if (value == KERNEL_MEMTYPE) return L"Kernel Image";
-		else return L"Bad Type Value";
-	}
-	return memory_type_names[value];
-}
-
-void EFIAPI
-memory_update_marked_addresses(EFI_EVENT UNUSED *event, void *context)
-{
-	EFI_RUNTIME_SERVICES *runsvc = (EFI_RUNTIME_SERVICES*)context;
-	for (size_t i = 0; i < fixup_pointer_index; ++i) {
-		if (fixup_pointers[i])
-			runsvc->ConvertPointer(0, fixup_pointers[i]);
-	}
-}
-
-EFI_STATUS
-memory_init_pointer_fixup(EFI_BOOT_SERVICES *bootsvc, EFI_RUNTIME_SERVICES *runsvc)
-{
-	EFI_STATUS status;
-	EFI_EVENT event;
-
-	status = bootsvc->CreateEvent(
-			EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,
-			TPL_CALLBACK,
-			(EFI_EVENT_NOTIFY)&memory_update_marked_addresses,
-			runsvc,
-			&event);
-
-	CHECK_EFI_STATUS_OR_RETURN(status, "Failed to initialize pointer update event.");
-
-	// Reserve a page for our replacement PML4, plus some pages for the kernel to use
-	// as page tables while it gets started.
-	EFI_PHYSICAL_ADDRESS addr = 0;
-	status = bootsvc->AllocatePages(AllocateAnyPages, EfiLoaderData, 16, &addr);
-	CHECK_EFI_STATUS_OR_RETURN(status, "Failed to allocate page table pages.");
-
-	new_pml4 = (uint64_t *)addr;
-	return EFI_SUCCESS;
-}
-
-void
-memory_mark_pointer_fixup(void **p)
-{
-	if (fixup_pointer_index == 0) {
-		const size_t count = sizeof(fixup_pointers) / sizeof(void*);
-		for (size_t i = 0; i < count; ++i) fixup_pointers[i] = 0;
-	}
-	fixup_pointers[fixup_pointer_index++] = p;
-}
-
-void
-copy_desc(EFI_MEMORY_DESCRIPTOR *src, EFI_MEMORY_DESCRIPTOR *dst, size_t len)
-{
-	uint8_t *srcb = (uint8_t *)src;
-	uint8_t *dstb = (uint8_t *)dst;
-	uint8_t *endb = srcb + len;
-	while (srcb < endb)
-		*dstb++ = *srcb++;
-}
-
-EFI_STATUS
-memory_get_map_length(EFI_BOOT_SERVICES *bootsvc, size_t *size)
-{
-	if (size == NULL)
-		return EFI_INVALID_PARAMETER;
-
-	EFI_STATUS status;
-	size_t key, desc_size;
-	uint32_t desc_version;
-	*size = 0;
-	status = bootsvc->GetMemoryMap(size, 0, &key, &desc_size, &desc_version);
-	if (status != EFI_BUFFER_TOO_SMALL) {
-		CHECK_EFI_STATUS_OR_RETURN(status, "Failed to get memory map size");
-	}
-	return EFI_SUCCESS;
-}
-
-EFI_STATUS
-memory_get_map(EFI_BOOT_SERVICES *bootsvc, struct memory_map *map)
-{
-	EFI_STATUS status;
-
-	if (map == NULL)
-		return EFI_INVALID_PARAMETER;
-
-	size_t needs_size = 0;
-	status = memory_get_map_length(bootsvc, &needs_size);
-	if (EFI_ERROR(status)) return status;
-
-	if (map->length < needs_size)
-		return EFI_BUFFER_TOO_SMALL;
-
-	status = bootsvc->GetMemoryMap(&map->length, map->entries, &map->key, &map->size, &map->version);
-	CHECK_EFI_STATUS_OR_RETURN(status, "Failed to load memory map");
-	return EFI_SUCCESS;
-}
-
-EFI_STATUS
-memory_dump_map(struct memory_map *map)
-{
-	if (map == NULL)
-		return EFI_INVALID_PARAMETER;
-
-	const size_t count = map->length / map->size;
-
-	con_printf(L"Memory map:\n");
-	con_printf(L"\t	Descriptor Count: %d (%d bytes)\n", count, map->length);
-	con_printf(L"\t  Descriptor Size: %d bytes\n", map->size);
-	con_printf(L"\t      Type offset: %d\n\n", offsetof(EFI_MEMORY_DESCRIPTOR, Type));
-
-	EFI_MEMORY_DESCRIPTOR *end = INCREMENT_DESC(map->entries, map->length);
-	EFI_MEMORY_DESCRIPTOR *d = map->entries;
-	while (d < end) {
-		int runtime = (d->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME;
-		con_printf(L"%s%s ", memory_type_name(d->Type), runtime ? L"*" : L" ");
-		con_printf(L"%lx ", d->PhysicalStart);
-		con_printf(L"%lx ", d->VirtualStart);
-		con_printf(L"[%4d]\n", d->NumberOfPages);
-
-		d = INCREMENT_DESC(d, map->size);
-	}
-
-	return EFI_SUCCESS;
-}
-
-void
-memory_virtualize(EFI_RUNTIME_SERVICES *runsvc, struct memory_map *map)
-{
-	memory_mark_pointer_fixup((void **)&runsvc);
-	memory_mark_pointer_fixup((void **)&map);
-
-	// Get the pointer to the start of PML4
-	uint64_t* cr3 = 0;
-	__asm__ __volatile__ ( "mov %%cr3, %0" : "=r" (cr3) );
-
-	// PML4 is indexed with bits 39:47 of the virtual address
-	uint64_t offset = (KERNEL_VIRT_ADDRESS >> 39) & 0x1ff;
-
-	// Double map the lower half pages that are present into the higher half
-	for (unsigned i = 0; i < offset; ++i) {
-		if (cr3[i] & 0x1)
-			new_pml4[i] = new_pml4[offset+i] = cr3[i];
-		else
-			new_pml4[i] = new_pml4[offset+i] = 0;
-	}
-
-	// Write our new PML4 pointer back to CR3
-	__asm__ __volatile__ ( "mov %0, %%cr3" :: "r" (new_pml4) );
-
-	EFI_MEMORY_DESCRIPTOR *end = INCREMENT_DESC(map->entries, map->length);
-	EFI_MEMORY_DESCRIPTOR *d = map->entries;
-	while (d < end) {
-		switch (d->Type) {
-		case KERNEL_MEMTYPE:
-		case KERNEL_FONT_MEMTYPE:
-		case KERNEL_DATA_MEMTYPE:
-			d->Attribute |= EFI_MEMORY_RUNTIME;
-			d->VirtualStart = d->PhysicalStart + KERNEL_VIRT_ADDRESS;
-
-		default:
-			if (d->Attribute & EFI_MEMORY_RUNTIME) {
-				d->VirtualStart = d->PhysicalStart + KERNEL_VIRT_ADDRESS;
-			}
-		}
-		d = INCREMENT_DESC(d, map->size);
-	}
-
-	runsvc->SetVirtualAddressMap(map->length, map->size, map->version, map->entries);
-}

src/boot/memory.cpp

@@ -0,0 +1,384 @@
+#include <stddef.h>
+#include <uefi/types.h>
+
+#include "kernel_memory.h"
+
+#include "console.h"
+#include "error.h"
+#include "memory.h"
+#include "paging.h"
+#include "status.h"
+
+namespace boot {
+namespace memory {
+
+using mem_entry = kernel::args::mem_entry;
+using mem_type = kernel::args::mem_type;
+using frame_block = kernel::args::frame_block;
+using kernel::args::frames_per_block;
+
+size_t fixup_pointer_index = 0;
+void **fixup_pointers[64];
+
+static const wchar_t *memory_type_names[] = {
+	L"reserved memory type",
+	L"loader code",
+	L"loader data",
+	L"boot services code",
+	L"boot services data",
+	L"runtime services code",
+	L"runtime services data",
+	L"conventional memory",
+	L"unusable memory",
+	L"acpi reclaim memory",
+	L"acpi memory nvs",
+	L"memory mapped io",
+	L"memory mapped io port space",
+	L"pal code",
+	L"persistent memory"
+};
+
+static const wchar_t *kernel_memory_type_names[] = {
+	L"free",
+	L"pending",
+	L"acpi",
+	L"uefi_runtime",
+	L"mmio",
+	L"persistent"
+};
+
+static const wchar_t *
+memory_type_name(uefi::memory_type t)
+{
+	if (t < uefi::memory_type::max_memory_type)
+		return memory_type_names[static_cast<uint32_t>(t)];
+
+	return L"Bad Type Value";
+}
+
+static const wchar_t *
+kernel_memory_type_name(kernel::args::mem_type t)
+{
+	return kernel_memory_type_names[static_cast<uint32_t>(t)];
+}
+
+void
+update_marked_addresses(uefi::event, void *context)
+{
+	uefi::runtime_services *rs =
+		reinterpret_cast<uefi::runtime_services*>(context);
+
+	for (size_t i = 0; i < fixup_pointer_index; ++i) {
+		if (fixup_pointers[i])
+			rs->convert_pointer(0, fixup_pointers[i]);
+	}
+}
+
+void
+init_pointer_fixup(uefi::boot_services *bs, uefi::runtime_services *rs)
+{
+	status_line status(L"Initializing pointer virtualization event");
+
+	uefi::event event;
+	bs->set_mem(&fixup_pointers, sizeof(fixup_pointers), 0);
+	fixup_pointer_index = 0;
+
+	try_or_raise(
+		bs->create_event(
+			uefi::evt::signal_virtual_address_change,
+			uefi::tpl::callback,
+			(uefi::event_notify)&update_marked_addresses,
+			rs,
+			&event),
+		L"Error creating memory virtualization event");
+}
+
+void
+mark_pointer_fixup(void **p)
+{
+	fixup_pointers[fixup_pointer_index++] = p;
+}
+
+bool
+can_merge(mem_entry &prev, mem_type type, uefi::memory_descriptor *next)
+{
+	return
+		prev.type == type &&
+		prev.start + (page_size * prev.pages) == next->physical_start &&
+		prev.attr == (next->attribute & 0xffffffff);
+}
+
+void
+get_uefi_mappings(efi_mem_map &map, uefi::boot_services *bs)
+{
+	size_t length = map.total;
+	uefi::status status = bs->get_memory_map(
+		&length, map.entries, &map.key, &map.size, &map.version);
+	map.length = length;
+
+	if (status == uefi::status::success)
+		return;
+
+	if (status != uefi::status::buffer_too_small)
+		error::raise(status, L"Error getting memory map size");
+
+	if (map.entries) {
+		try_or_raise(
+			bs->free_pool(reinterpret_cast<void*>(map.entries)),
+			L"Freeing previous memory map space");
+	}
+
+	map.total = length + 10*map.size;
+
+	try_or_raise(
+		bs->allocate_pool(
+			uefi::memory_type::loader_data, map.total,
+			reinterpret_cast<void**>(&map.entries)),
+		L"Allocating space for memory map");
+
+	map.length = map.total;
+	try_or_raise(
+		bs->get_memory_map(&map.length, map.entries, &map.key, &map.size, &map.version),
+		L"Getting UEFI memory map");
+}
+
+inline size_t bitmap_size(size_t frames) { return (frames + 63) / 64; }
+inline size_t num_blocks(size_t frames) { return (frames + (frames_per_block-1)) / frames_per_block; }
+
+void
+build_kernel_frame_blocks(const mem_entry *map, size_t nent, kernel::args::header *args, uefi::boot_services *bs)
+{
+	status_line status {L"Creating kernel frame accounting map"};
+
+	size_t block_count = 0;
+	size_t total_bitmap_size = 0;
+	for (size_t i = 0; i < nent; ++i) {
+		const mem_entry &ent = map[i];
+		if (ent.type != mem_type::free)
+			continue;
+
+		block_count += num_blocks(ent.pages);
+		total_bitmap_size += bitmap_size(ent.pages) * sizeof(uint64_t);
+	}
+
+	size_t total_size = block_count * sizeof(frame_block) + total_bitmap_size;
+
+	frame_block *blocks = nullptr;
+	try_or_raise(
+		bs->allocate_pages(
+			uefi::allocate_type::any_pages,
+			uefi::memory_type::loader_data,
+			bytes_to_pages(total_size),
+			reinterpret_cast<void**>(&blocks)),
+		L"Error allocating kernel frame block space");
+
+	frame_block *next_block = blocks;
+	for (size_t i = 0; i < nent; ++i) {
+		const mem_entry &ent = map[i];
+		if (ent.type != mem_type::free)
+			continue;
+
+		size_t page_count = ent.pages;
+		uintptr_t base_addr = ent.start;
+		while (page_count) {
+			frame_block *blk = next_block++;
+			bs->set_mem(blk, sizeof(frame_block), 0);
+
+			blk->attrs = ent.attr;
+			blk->base = base_addr;
+			base_addr += frames_per_block * page_size;
+
+			if (page_count >= frames_per_block) {
+				page_count -= frames_per_block;
+				blk->count = frames_per_block;
+				blk->map1 = ~0ull;
+				bs->set_mem(blk->map2, sizeof(blk->map2), 0xff);
+			} else {
+				blk->count = page_count;
+				unsigned i = 0;
+
+				uint64_t b1 = (page_count + 4095) / 4096;
+				blk->map1 = (1 << b1) - 1;
+
+				uint64_t b2 = (page_count + 63) / 64;
+				uint64_t b2q = b2 / 64;
+				uint64_t b2r = b2 % 64;
+				bs->set_mem(blk->map2, b2q, 0xff);
+				blk->map2[b2q] = (1 << b2r) - 1;
+				break;
+			}
+		}
+	}
+
+	uint64_t *bitmap = reinterpret_cast<uint64_t*>(next_block);
+	bs->set_mem(bitmap, total_bitmap_size, 0);
+	for (unsigned i = 0; i < block_count; ++i) {
+		frame_block &blk = blocks[i];
+		blk.bitmap = bitmap;
+
+		size_t b = blk.count / 64;
+		size_t r = blk.count % 64;
+		bs->set_mem(blk.bitmap, b*8, 0xff);
+		blk.bitmap[b] = (1 << r) - 1;
+
+		bitmap += bitmap_size(blk.count);
+	}
+
+	args->frame_block_count = block_count;
+	args->frame_block_pages = bytes_to_pages(total_size);
+	args->frame_blocks = blocks;
+}
+
+void
+fix_frame_blocks(kernel::args::header *args)
+{
+	// Map the frame blocks to the appropriate address
+	paging::map_pages(args,
+		reinterpret_cast<uintptr_t>(args->frame_blocks),
+		::memory::bitmap_start,
+		args->frame_block_pages,
+		true, false);
+
+	uintptr_t offset = ::memory::bitmap_start -
+		reinterpret_cast<uintptr_t>(args->frame_blocks);
+
+	for (unsigned i = 0; i < args->frame_block_count; ++i) {
+		frame_block &blk = args->frame_blocks[i];
+		blk.bitmap = reinterpret_cast<uint64_t*>(
+			reinterpret_cast<uintptr_t>(blk.bitmap) + offset);
+	}
+}
+
+efi_mem_map
+build_kernel_mem_map(kernel::args::header *args, uefi::boot_services *bs)
+{
+	status_line status {L"Creating kernel memory map"};
+
+	efi_mem_map map;
+	get_uefi_mappings(map, bs);
+
+	size_t map_size = map.num_entries() * sizeof(mem_entry);
+
+	kernel::args::mem_entry *kernel_map = nullptr;
+	try_or_raise(
+		bs->allocate_pages(
+			uefi::allocate_type::any_pages,
+			uefi::memory_type::loader_data,
+			bytes_to_pages(map_size),
+			reinterpret_cast<void**>(&kernel_map)),
+		L"Error allocating kernel memory map module space");
+
+	bs->set_mem(kernel_map, map_size, 0);
+	get_uefi_mappings(map, bs);
+
+	size_t nent = 0;
+	bool first = true;
+	for (auto desc : map) {
+		/*
+		// EFI map dump
+		console::print(L"   eRange %lx (%lx) %x(%s) [%lu]\r\n",
+			desc->physical_start, desc->attribute, desc->type, memory_type_name(desc->type), desc->number_of_pages);
+		*/
+
+		mem_type type;
+		switch (desc->type) {
+			case uefi::memory_type::reserved:
+			case uefi::memory_type::unusable_memory:
+			case uefi::memory_type::acpi_memory_nvs:
+			case uefi::memory_type::pal_code:
+				continue;
+
+			case uefi::memory_type::loader_code:
+			case uefi::memory_type::boot_services_code:
+			case uefi::memory_type::boot_services_data:
+			case uefi::memory_type::conventional_memory:
+			case uefi::memory_type::loader_data:
+				type = mem_type::free;
+				break;
+
+			case uefi::memory_type::runtime_services_code:
+			case uefi::memory_type::runtime_services_data:
+				type = mem_type::uefi_runtime;
+				break;
+
+			case uefi::memory_type::acpi_reclaim_memory:
+				type = mem_type::acpi;
+				break;
+
+			case uefi::memory_type::memory_mapped_io:
+			case uefi::memory_type::memory_mapped_io_port_space:
+				type = mem_type::mmio;
+				break;
+
+			case uefi::memory_type::persistent_memory:
+				type = mem_type::persistent;
+				break;
+
+			default:
+				error::raise(
+					uefi::status::invalid_parameter,
+					L"Got an unexpected memory type from UEFI memory map");
+		}
+
+		// TODO: validate uefi's map is sorted
+		if (first) {
+			first = false;
+			mem_entry &ent = kernel_map[nent++];
+			ent.start = desc->physical_start;
+			ent.pages = desc->number_of_pages;
+			ent.type = type;
+			ent.attr = (desc->attribute & 0xffffffff);
+			continue;
+		}
+
+		mem_entry &prev = kernel_map[nent - 1];
+		if (can_merge(prev, type, desc)) {
+			prev.pages += desc->number_of_pages;
+		} else {
+			mem_entry &next = kernel_map[nent++];
+			next.start = desc->physical_start;
+			next.pages = desc->number_of_pages;
+			next.type = type;
+			next.attr = (desc->attribute & 0xffffffff);
+		}
+	}
+
+	// Give just the actually-set entries in the header
+	args->mem_map = kernel_map;
+	args->map_count = nent;
+
+	/*
+	// kernel map dump
+	for (unsigned i = 0; i < nent; ++i) {
+		const kernel::args::mem_entry &e = kernel_map[i];
+		console::print(L"   kRange %lx (%lx) %x(%s) [%lu]\r\n",
+			e.start, e.attr, e.type, kernel_memory_type_name(e.type), e.pages);
+	}
+	*/
+
+	build_kernel_frame_blocks(kernel_map, nent, args, bs);
+	get_uefi_mappings(map, bs);
+	return map;
+}
+
+void
+virtualize(void *pml4, efi_mem_map &map, uefi::runtime_services *rs)
+{
+	paging::add_current_mappings(reinterpret_cast<paging::page_table*>(pml4));
+
+	for (auto desc : map)
+		desc->virtual_start = desc->physical_start + ::memory::page_offset;
+
+	// Write our new PML4 pointer to CR3
+	asm volatile ( "mov %0, %%cr3" :: "r" (pml4) );
+	__sync_synchronize();
+
+	try_or_raise(
+		rs->set_virtual_address_map(
+			map.length, map.size, map.version, map.entries),
+		L"Error setting virtual address map");
+}
+
+
+} // namespace boot
+} // namespace memory

src/boot/memory.h

@@ -1,19 +1,84 @@
+/// \file memory.h
+/// Memory-related constants and functions.
 #pragma once
-#include <efi/efi.h>
+#include <uefi/boot_services.h>
+#include <uefi/runtime_services.h>
+#include <stdint.h>
+#include "kernel_args.h"
+#include "pointer_manipulation.h"
 
-struct memory_map {
-	size_t length;
-	size_t size;
-	size_t key;
-	uint32_t version;
-	EFI_MEMORY_DESCRIPTOR *entries;
+namespace boot {
+namespace memory {
+
+/// UEFI specifies that pages are always 4 KiB.
+constexpr size_t page_size = 0x1000;
+
+/// Get the number of pages needed to hold `bytes` bytes
+inline constexpr size_t bytes_to_pages(size_t bytes) {
+	return ((bytes - 1) / page_size) + 1;
+}
+
+/// \defgroup pointer_fixup
+/// Memory virtualization pointer fixup functions. Handles changing affected pointers
+/// when calling UEFI's `set_virtual_address_map` function to change the location of
+/// runtime services in virtual memory.
+/// @{
+
+/// Set up the pointer fixup UEFI events. This registers the necessary callbacks for
+/// runtime services to call when `set_virtual_address_map` is called.
+void init_pointer_fixup(uefi::boot_services *bs, uefi::runtime_services *rs);
+
+/// Mark a given pointer as needing to be updated when doing pointer fixup.
+void mark_pointer_fixup(void **p);
+
+/// @}
+
+/// Struct that represents UEFI's memory map. Contains a pointer to the map data
+/// as well as the data on how to read it.
+struct efi_mem_map
+{
+	using desc = uefi::memory_descriptor;
+	using iterator = offset_iterator<desc>;
+
+	size_t length;     ///< Total length of the map data
+	size_t total;      ///< Total allocated space for map data
+	size_t size;       ///< Size of an entry in the array
+	size_t key;        ///< Key for detecting changes
+	uint32_t version;  ///< Version of the `memory_descriptor` struct
+	desc *entries;     ///< The array of UEFI descriptors
+
+	efi_mem_map() : length(0), total(0), size(0), key(0), version(0), entries(nullptr) {}
+
+	/// Get the count of entries in the array
+	inline size_t num_entries() const { return length / size; }
+
+	/// Return an iterator to the beginning of the array
+	iterator begin() { return iterator(entries, size); }
+
+	/// Return an iterator to the end of the array
+	iterator end() { return offset_ptr<desc>(entries, length); }
 };
 
-EFI_STATUS memory_init_pointer_fixup(EFI_BOOT_SERVICES *bootsvc, EFI_RUNTIME_SERVICES *runsvc);
-void memory_mark_pointer_fixup(void **p);
+/// Add the kernel's memory map as a module to the kernel args.
+/// \returns  The uefi memory map used to build the kernel map
+efi_mem_map build_kernel_mem_map(kernel::args::header *args, uefi::boot_services *bs);
 
-EFI_STATUS memory_get_map_length(EFI_BOOT_SERVICES *bootsvc, size_t *size);
-EFI_STATUS memory_get_map(EFI_BOOT_SERVICES *bootsvc, struct memory_map *map);
-EFI_STATUS memory_dump_map(struct memory_map *map);
+/// Create the kernel frame allocation maps
+void build_kernel_frame_blocks(
+		const kernel::args::mem_entry *map, size_t nent,
+		kernel::args::header *args, uefi::boot_services *bs);
 
-void memory_virtualize(EFI_RUNTIME_SERVICES *runsvc, struct memory_map *map);
+/// Map the frame allocation maps to the right spot and fix up pointers
+void fix_frame_blocks(kernel::args::header *args);
+
+/// Activate the given memory mappings. Sets the given page tables live as well
+/// as informs UEFI runtime services of the new mappings.
+/// \arg pml4  The root page table for the new mappings
+/// \arg map   The UEFI memory map, used to update runtime services
+void virtualize(
+	void *pml4,
+	efi_mem_map &map,
+	uefi::runtime_services *rs);
+
+} // namespace boot
+} // namespace memory

src/boot/paging.cpp

@@ -0,0 +1,287 @@
+#include "kernel_memory.h"
+
+#include "console.h"
+#include "error.h"
+#include "loader.h"
+#include "memory.h"
+#include "paging.h"
+#include "pointer_manipulation.h"
+#include "status.h"
+
+namespace boot {
+namespace paging {
+
+using memory::page_size;
+using ::memory::pml4e_kernel;
+using ::memory::table_entries;
+
+// Flags: 0 0 0 1  0 0 0 0  0 0 0 1 = 0x0101
+//         IGN  |  | | | |  | | | +- Present
+//              |  | | | |  | | +--- Writeable
+//              |  | | | |  | +----- Usermode access (supervisor only)
+//              |  | | | |  +------- PWT (determining memory type for page)
+//              |  | | | +---------- PCD (determining memory type for page)
+//              |  | | +------------ Accessed flag (not accessed yet)
+//              |  | +-------------- Dirty (not dirtied yet)
+//              |  +---------------- PAT (determining memory type for page)
+//              +------------------- Global
+/// Page table entry flags for entries pointing at a page
+constexpr uint64_t page_flags = 0x101;
+
+// Flags: 0  0 0 0 1  1 0 0 0  1 0 1 1 = 0x018b
+//        |   IGN  |  | | | |  | | | +- Present
+//        |        |  | | | |  | | +--- Writeable
+//        |        |  | | | |  | +----- Supervisor only
+//        |        |  | | | |  +------- PWT (determining memory type for page)
+//        |        |  | | | +---------- PCD (determining memory type for page)
+//        |        |  | | +------------ Accessed flag (not accessed yet)
+//        |        |  | +-------------- Dirty (not dirtied yet)
+//        |        |  +---------------- Page size (1GiB page)
+//        |        +------------------- Global
+//        +---------------------------- PAT (determining memory type for page)
+/// Page table entry flags for entries pointing at a huge page
+constexpr uint64_t huge_page_flags = 0x18b;
+
+// Flags: 0 0 0 0  0 0 0 0  0 0 1 1 = 0x0003
+//        IGNORED  | | | |  | | | +- Present
+//                 | | | |  | | +--- Writeable
+//                 | | | |  | +----- Usermode access (Supervisor only)
+//                 | | | |  +------- PWT (determining memory type for pdpt)
+//                 | | | +---------- PCD (determining memory type for pdpt)
+//                 | | +------------ Accessed flag (not accessed yet)
+//                 | +-------------- Ignored
+//                 +---------------- Reserved 0 (Table pointer, not page)
+/// Page table entry flags for entries pointing at another table
+constexpr uint64_t table_flags = 0x003;
+
+/// Iterator over page table entries.
+template <unsigned D = 4>
+class page_entry_iterator
+{
+public:
+	/// Constructor.
+	/// \arg virt       Virtual address this iterator is starting at
+	/// \arg pml4       Root of the page tables to iterate
+	/// \arg page_cache Pointer to pages that can be used for page tables
+	/// \arg page_count Number of pages pointed to by `page_cache`
+	page_entry_iterator(
+			uintptr_t virt,
+			page_table *pml4,
+			void *&page_cache,
+			size_t &cache_count) :
+		m_page_cache(page_cache),
+		m_cache_count(cache_count)
+	{
+		m_table[0] = pml4;
+		for (unsigned i = 0; i < D; ++i) {
+			m_index[i] = static_cast<uint16_t>((virt >> (12 + 9*(3-i))) & 0x1ff);
+			ensure_table(i);
+		}
+	}
+
+	uintptr_t vaddress() const {
+		uintptr_t address = 0;
+		for (unsigned i = 0; i < D; ++i)
+			address |= static_cast<uintptr_t>(m_index[i]) << (12 + 9*(3-i));
+		if (address & (1ull<<47)) // canonicalize the address
+			address |= (0xffffull<<48);
+		return address;
+	}
+
+	void increment()
+	{
+		for (unsigned i = D - 1; i >= 0; --i) {
+			if (++m_index[i] <= 511) {
+				for (unsigned j = i + 1; j < D; ++j)
+					ensure_table(j);
+				return;
+			}
+
+			m_index[i] = 0;
+		}
+	}
+
+	uint64_t & operator*() { return entry(D-1); }
+
+private:
+	inline uint64_t & entry(unsigned level) { return m_table[level]->entries[m_index[level]]; }
+
+	void ensure_table(unsigned level)
+	{
+		// We're only dealing with D levels of paging, and
+		// there must always be a PML4.
+		if (level < 1 || level >= D)
+			return;
+
+		// Entry in the parent that points to the table we want
+		uint64_t & parent_ent = entry(level - 1);
+
+		if (!(parent_ent & 1)) {
+			if (!m_cache_count--)
+				error::raise(uefi::status::out_of_resources, L"Page table cache empty", 0x7ab1e5);
+
+			page_table *table = reinterpret_cast<page_table*>(m_page_cache);
+			m_page_cache = offset_ptr<void>(m_page_cache, page_size);
+
+			parent_ent = (reinterpret_cast<uintptr_t>(table) & ~0xfffull) | table_flags;
+			m_table[level] = table;
+		} else {
+			m_table[level] = reinterpret_cast<page_table*>(parent_ent & ~0xfffull);
+		}
+	}
+
+	void *&m_page_cache;
+	size_t &m_cache_count;
+	page_table *m_table[D];
+	uint16_t m_index[D];
+};
+
+
+static void
+add_offset_mappings(page_table *pml4, void *&page_cache, size_t &num_pages)
+{
+	uintptr_t phys = 0;
+	uintptr_t virt = ::memory::page_offset; // Start of offset-mapped area
+	size_t pages = 64 * 1024; // 64 TiB of 1 GiB pages
+	constexpr size_t GiB = 0x40000000ull;
+
+	page_entry_iterator<2> iterator{
+		virt, pml4,
+		page_cache,
+		num_pages};
+
+	while (true) {
+		*iterator = phys | huge_page_flags;
+		if (--pages == 0)
+			break;
+
+		iterator.increment();
+		phys += GiB;
+	}
+}
+
+static void
+add_kernel_pds(page_table *pml4, void *&page_cache, size_t &num_pages)
+{
+	for (unsigned i = pml4e_kernel; i < table_entries; ++i) {
+		pml4->set(i, page_cache, table_flags);
+		page_cache = offset_ptr<void>(page_cache, page_size);
+		num_pages--;
+	}
+}
+
+void
+add_current_mappings(page_table *new_pml4)
+{
+	// Get the pointer to the current PML4
+	page_table *old_pml4 = 0;
+	asm volatile ( "mov %%cr3, %0" : "=r" (old_pml4) );
+
+	// Only copy mappings in the lower half
+	for (int i = 0; i < ::memory::pml4e_kernel; ++i) {
+		uint64_t entry = old_pml4->entries[i];
+		if (entry & 1)
+			new_pml4->entries[i] = entry;
+	}
+}
+
+void
+allocate_tables(kernel::args::header *args, uefi::boot_services *bs)
+{
+	status_line status(L"Allocating initial page tables");
+
+	static constexpr size_t pd_tables = 256;   // number of pages for kernelspace PDs
+	static constexpr size_t extra_tables = 64; // number of extra pages
+
+	// number of pages for kernelspace PDs + PML4
+	static constexpr size_t kernel_tables = pd_tables + 1;
+
+	static constexpr size_t tables_needed = kernel_tables + extra_tables;
+
+	void *addr = nullptr;
+	try_or_raise(
+		bs->allocate_pages(
+			uefi::allocate_type::any_pages,
+			uefi::memory_type::loader_data,
+			tables_needed,
+			&addr),
+		L"Error allocating page table pages.");
+
+	bs->set_mem(addr, tables_needed*page_size, 0);
+
+	page_table *pml4 = reinterpret_cast<page_table*>(addr);
+
+	args->pml4 = pml4;
+	args->table_pages = tables_needed;
+	args->table_count = tables_needed - 1;
+	args->page_tables = offset_ptr<void>(addr, page_size);
+
+	console::print(L"    First page (pml4) at: 0x%lx\r\n", pml4);
+
+	add_kernel_pds(pml4, args->page_tables, args->table_count);
+	add_offset_mappings(pml4, args->page_tables, args->table_count);
+
+	//console::print(L"    Set up initial mappings, %d spare tables.\r\n", args->table_count);
+}
+
+template <typename E>
+constexpr bool has_flag(E set, E flag) {
+	return
+		(static_cast<uint64_t>(set) & static_cast<uint64_t>(flag)) ==
+		 static_cast<uint64_t>(flag);
+}
+
+void
+map_pages(
+	kernel::args::header *args,
+	uintptr_t phys, uintptr_t virt,
+	size_t count, bool write_flag, bool exe_flag)
+{
+	if (!count)
+		return;
+
+	paging::page_table *pml4 =
+		reinterpret_cast<paging::page_table*>(args->pml4);
+
+	page_entry_iterator<4> iterator{
+		virt, pml4,
+		args->page_tables,
+		args->table_count};
+
+	uint64_t flags = page_flags;
+	if (!exe_flag)
+		flags |= (1ull << 63); // set NX bit
+	if (write_flag)
+		flags |= 2;
+
+	while (true) {
+		*iterator = phys | flags;
+		if (--count == 0)
+			break;
+
+		iterator.increment();
+		phys += page_size;
+	}
+}
+
+void
+map_section(
+	kernel::args::header *args,
+	const kernel::args::program_section &section)
+{
+	using kernel::args::section_flags;
+
+	size_t pages = memory::bytes_to_pages(section.size);
+
+	map_pages(
+		args,
+		section.phys_addr,
+		section.virt_addr,
+		pages,
+		has_flag(section.type, section_flags::write),
+		has_flag(section.type, section_flags::execute));
+}
+
+
+} // namespace paging
+} // namespace boot

src/boot/paging.h

@@ -0,0 +1,59 @@
+#pragma once
+/// \file paging.h
+/// Page table structure and related definitions
+#include <stdint.h>
+#include <uefi/boot_services.h>
+#include "kernel_args.h"
+
+namespace boot {
+namespace paging {
+
+/// Struct to allow easy accessing of a memory page being used as a page table.
+struct page_table
+{
+	uint64_t entries[512];
+
+	inline page_table * get(int i, uint16_t *flags = nullptr) const {
+		uint64_t entry = entries[i];
+		if ((entry & 1) == 0) return nullptr;
+		if (flags) *flags = entry & 0xfff;
+		return reinterpret_cast<page_table *>(entry & ~0xfffull);
+	}
+
+	inline void set(int i, void *p, uint16_t flags) {
+		entries[i] = reinterpret_cast<uint64_t>(p) | (flags & 0xfff);
+	}
+};
+
+/// Allocate memory to be used for initial page tables. Initial offset-mapped
+/// page tables are pre-filled. All pages are saved as a module in kernel args
+/// and kernel args' `page_table_cache` and `num_free_tables` are updated with
+/// the leftover space.
+void allocate_tables(
+	kernel::args::header *args,
+	uefi::boot_services *bs);
+
+/// Copy existing page table entries to a new page table. Does not do a deep
+/// copy - the new PML4 is updated to point to the existing next-level page
+/// tables in the current PML4.
+void add_current_mappings(page_table *new_pml4);
+
+/// Map physical memory pages to virtual addresses in the given page tables.
+/// \arg args    The kernel args header, used for the page table cache and pml4
+/// \arg section The program section to load
+void map_pages(
+	kernel::args::header *args,
+	uintptr_t phys, uintptr_t virt,
+	size_t count, bool write_flag, bool exe_flag);
+
+/// Map a program section in physical memory to its virtual address in the
+/// given page tables.
+/// \arg args    The kernel args header, used for the page table cache and pml4
+/// \arg section The program section to load
+void map_section(
+	kernel::args::header *args,
+	const kernel::args::program_section &section);
+
+
+} // namespace paging
+} // namespace boot

src/boot/pointer_manipulation.h

@@ -0,0 +1,41 @@
+/// \file pointer_manipulation.h
+/// Helper functions and types for doing type-safe byte-wise pointer math.
+#pragma once
+
+namespace boot {
+
+/// Return a pointer offset from `input` by `offset` bytes.
+/// \tparam T  Cast the return value to a pointer to `T`
+/// \tparam S  The type pointed to by the `input` pointer
+template <typename T, typename S>
+inline T* offset_ptr(S* input, ptrdiff_t offset) {
+	return reinterpret_cast<T*>(reinterpret_cast<uintptr_t>(input) + offset);
+}
+
+/// Iterator for an array of `T` whose size is known at runtime
+/// \tparam T  Type of the objects in the array, whose size might not be
+///            what is returned by sizeof(T).
+template <typename T>
+class offset_iterator
+{
+public:
+	/// Constructor.
+	/// \arg t    Pointer to the first item in the array
+	/// \arg off  Offset applied to reach successive items. Default is 0,
+	///           which creates an effectively constant iterator.
+	offset_iterator(T* t, size_t off=0) : m_t(t), m_off(off) {}
+
+	T* operator++() { m_t = offset_ptr<T>(m_t, m_off); return m_t; }
+	T* operator++(int) { T* tmp = m_t; operator++(); return tmp; }
+	bool operator==(T* p) { return p == m_t; }
+
+	T* operator*() const { return m_t; }
+	operator T*() const { return m_t; }
+	T* operator->() const { return m_t; }
+
+private:
+	T* m_t;
+	size_t m_off;
+};
+
+} // namespace boot

src/boot/reloc.c

@@ -1,96 +0,0 @@
-/* reloc_x86_64.c - position independent x86_64 ELF shared object relocator
-   Copyright (C) 1999 Hewlett-Packard Co.
-	Contributed by David Mosberger <davidm@hpl.hp.com>.
-   Copyright (C) 2005 Intel Co.
-	Contributed by Fenghua Yu <fenghua.yu@intel.com>.
-
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials
-      provided with the distribution.
-    * Neither the name of Hewlett-Packard Co. nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
-    CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-    BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
-    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
-    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-    SUCH DAMAGE.
-*/
-
-#include <efi/efi.h>
-#include <elf.h>
-
-EFI_STATUS _relocate (long ldbase, Elf64_Dyn *dyn,
-		      EFI_HANDLE image EFI_UNUSED,
-		      EFI_SYSTEM_TABLE *systab EFI_UNUSED)
-{
-	long relsz = 0, relent = 0;
-	Elf64_Rel *rel = 0;
-	unsigned long *addr;
-	int i;
-
-	for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
-		switch (dyn[i].d_tag) {
-			case DT_RELA:
-				rel = (Elf64_Rel*)
-					((unsigned long)dyn[i].d_un.d_ptr
-					 + ldbase);
-				break;
-
-			case DT_RELASZ:
-				relsz = dyn[i].d_un.d_val;
-				break;
-
-			case DT_RELAENT:
-				relent = dyn[i].d_un.d_val;
-				break;
-
-			default:
-				break;
-		}
-	}
-
-        if (!rel && relent == 0)
-                return EFI_SUCCESS;
-
-	if (!rel || relent == 0)
-		return EFI_LOAD_ERROR;
-
-	while (relsz > 0) {
-		/* apply the relocs */
-		switch (ELF64_R_TYPE (rel->r_info)) {
-			case R_X86_64_NONE:
-				break;
-
-			case R_X86_64_RELATIVE:
-				addr = (unsigned long *)
-					(ldbase + rel->r_offset);
-				*addr += ldbase;
-				break;
-
-			default:
-				break;
-		}
-		rel = (Elf64_Rel*) ((char *) rel + relent);
-		relsz -= relent;
-	}
-	return EFI_SUCCESS;
-}

src/boot/status.cpp

@@ -0,0 +1,265 @@
+#include <uefi/types.h>
+#include <uefi/graphics.h>
+
+#include "console.h"
+#include "error.h"
+#include "kernel_args.h"
+#include "status.h"
+
+constexpr int num_boxes = 30;
+
+namespace boot {
+
+static constexpr int level_ok = 0;
+static constexpr int level_warn = 1;
+static constexpr int level_fail = 2;
+
+static const wchar_t *level_tags[] = {
+	L"  ok  ",
+	L" warn ",
+	L"failed"
+};
+
+static const uefi::attribute level_colors[] = {
+	uefi::attribute::green,
+	uefi::attribute::brown,
+	uefi::attribute::light_red
+};
+
+status *status::s_current = nullptr;
+unsigned status::s_current_type = 0;
+unsigned status_bar::s_count = 0;
+
+status_line::status_line(const wchar_t *message, const wchar_t *context, bool fails_clean) :
+	status(fails_clean),
+	m_level(level_ok),
+	m_depth(0),
+	m_outer(nullptr)
+{
+	if (status::s_current_type == status_line::type) {
+		m_outer = static_cast<status_line*>(s_current);
+		m_depth = (m_outer ? 1 + m_outer->m_depth : 0);
+	}
+	s_current = this;
+	s_current_type = status_line::type;
+
+	auto out = console::get().m_out;
+	m_line = out->mode->cursor_row;
+
+	int indent = 2 * m_depth;
+	out->set_cursor_position(indent, m_line);
+	out->set_attribute(uefi::attribute::light_gray);
+	out->output_string(message);
+
+	if (context) {
+		out->output_string(L": ");
+		out->output_string(context);
+	}
+
+	out->output_string(L"\r\n");
+	print_status_tag();
+}
+
+status_line::~status_line()
+{
+	if (s_current != this)
+		error::raise(uefi::status::unsupported, L"Destroying non-current status_line");
+
+	if (m_outer && m_level > m_outer->m_level) {
+		m_outer->m_level = m_level;
+		m_outer->print_status_tag();
+	}
+	s_current = m_outer;
+}
+
+void
+status_line::print_status_tag()
+{
+	auto out = console::get().m_out;
+	int row = out->mode->cursor_row;
+	int col = out->mode->cursor_column;
+
+	uefi::attribute color = level_colors[m_level];
+	const wchar_t *tag = level_tags[m_level];
+
+	out->set_cursor_position(50, m_line);
+
+	out->set_attribute(uefi::attribute::light_gray);
+	out->output_string(L"[");
+	out->set_attribute(color);
+	out->output_string(tag);
+	out->set_attribute(uefi::attribute::light_gray);
+	out->output_string(L"]\r\n");
+
+	out->set_cursor_position(col, row);
+}
+
+void
+status_line::do_warn(const wchar_t *message, uefi::status status)
+{
+	auto out = console::get().m_out;
+	int row = out->mode->cursor_row;
+
+	if (m_level < level_warn) {
+		m_level = level_warn;
+		print_status_tag();
+	}
+
+	int indent = 2 + 2 * m_depth;
+	out->set_cursor_position(indent, row);
+	out->set_attribute(uefi::attribute::yellow);
+	out->output_string(message);
+
+	const wchar_t *error = error::message(status);
+	if (error) {
+		out->output_string(L": ");
+		out->output_string(error);
+	}
+
+	out->set_attribute(uefi::attribute::light_gray);
+	out->output_string(L"\r\n");
+}
+
+void
+status_line::do_fail(const wchar_t *message, uefi::status status)
+{
+	auto out = console::get().m_out;
+	int row = out->mode->cursor_row;
+
+	if (m_level < level_fail) {
+		m_level = level_fail;
+		print_status_tag();
+	}
+
+	int indent = 2 + 2 * m_depth;
+	out->set_cursor_position(indent, row);
+	out->set_attribute(uefi::attribute::red);
+	out->output_string(message);
+
+	const wchar_t *error = error::message(status);
+	if (error) {
+		out->output_string(L": ");
+		out->output_string(error);
+	}
+
+	out->set_attribute(uefi::attribute::light_gray);
+	out->output_string(L"\r\n");
+}
+
+
+
+status_bar::status_bar(kernel::args::framebuffer const &fb) :
+	status(fb.size),
+	m_outer(nullptr)
+{
+	m_size = (fb.vertical / num_boxes) - 1;
+	m_top = fb.vertical - m_size;
+	m_horiz = fb.horizontal;
+	m_fb = reinterpret_cast<uint32_t*>(fb.phys_addr);
+	m_type = static_cast<uint16_t>(fb.type);
+	next();
+
+	if (status::s_current_type == status_bar::type)
+		m_outer = static_cast<status_bar*>(s_current);
+	s_current = this;
+	s_current_type = status_bar::type;
+}
+
+status_bar::~status_bar()
+{
+	if (s_current != this)
+		error::raise(uefi::status::unsupported, L"Destroying non-current status_bar");
+	draw_box();
+	s_current = m_outer;
+}
+
+void
+status_bar::do_warn(const wchar_t *message, uefi::status status)
+{
+	m_status = status;
+	if (m_level < level_warn) {
+		m_level = level_warn;
+		draw_box();
+	}
+}
+
+void
+status_bar::do_fail(const wchar_t *message, uefi::status status)
+{
+	m_status = status;
+	if (m_level < level_fail) {
+		m_level = level_fail;
+		draw_box();
+	}
+}
+
+static uint32_t
+make_color(uint8_t r, uint8_t g, uint8_t b, uint16_t type)
+{
+	switch (static_cast<kernel::args::fb_type>(type)) {
+	case kernel::args::fb_type::bgr8:
+		return
+			(static_cast<uint32_t>(b) <<  0) |
+			(static_cast<uint32_t>(g) <<  8) |
+			(static_cast<uint32_t>(r) << 16);
+
+	case kernel::args::fb_type::rgb8:
+		return
+			(static_cast<uint32_t>(r) <<  0) |
+			(static_cast<uint32_t>(g) <<  8) |
+			(static_cast<uint32_t>(b) << 16);
+	
+	default:
+		return 0;
+	}
+}
+
+void
+status_bar::draw_box()
+{
+	static const uint32_t colors[] = {0x909090, 0xf0f0f0};
+	constexpr unsigned ncolors = sizeof(colors) / sizeof(uint32_t);
+
+	if (m_fb == nullptr)
+		return;
+
+	unsigned x0 = m_current * m_size;
+	unsigned x1 = x0 + m_size - 3;
+	unsigned y0 = m_top;
+	unsigned y1 = m_top + m_size - 3;
+
+	uint32_t color = 0;
+	switch (m_level) {
+	case level_ok:
+		color = colors[m_current % ncolors];
+		break;
+	case level_warn:
+		color = make_color(0xff, 0xb2, 0x34, m_type);
+		break;
+	case level_fail:
+		color = make_color(0xfb, 0x0a, 0x1e, m_type);
+		break;
+	default:
+		color = 0;
+	}
+
+	for (unsigned y = y0; y < y1; ++y)
+		for (unsigned x = x0; x < x1; ++x)
+			m_fb[y * m_horiz + x] = color;
+
+	if (m_level > level_ok) {
+		unsigned nbars = static_cast<uint64_t>(m_status) & 0xffff;
+		constexpr unsigned bar_height = 4;
+
+		for (unsigned i = 1; i <= nbars; ++i) {
+			y0 = m_top - 2 * i * bar_height;
+			y1 = y0 + bar_height;
+
+			for (unsigned y = y0; y < y1; ++y)
+				for (unsigned x = x0; x < x1; ++x)
+					m_fb[y * m_horiz + x] = color;
+		}
+	}
+}
+
+} // namespace boot

src/boot/status.h

@@ -0,0 +1,131 @@
+/// \file status.h
+/// Status message and indicator handling
+#pragma once
+
+#include <stdint.h>
+#include <uefi/types.h>
+
+namespace kernel {
+namespace args {
+	class framebuffer;
+}
+}
+
+namespace boot {
+
+// Abstract base class for status reporters.
+class status
+{
+public:
+	status(bool fails_clean = true) : m_fails_clean(fails_clean) {}
+
+	virtual void do_warn(const wchar_t *message, uefi::status status) = 0;
+	virtual void do_fail(const wchar_t *message, uefi::status status) = 0;
+
+	/// Set the state to warning, and print a message. If the state is already at
+	/// warning or error, the state is unchanged but the message is still printed.
+	/// \arg message  The warning message to print, if text is supported
+	/// \arg status   If set, the error or warning code that should be represented
+	/// \returns      True if there was a status handler to display the warning
+	inline static bool warn(const wchar_t *message, uefi::status status = uefi::status::success) {
+		if (!s_current) return false;
+		s_current->do_warn(message, status);
+		return s_current->m_fails_clean;
+	}
+
+	/// Set the state to error, and print a message. If the state is already at
+	/// error, the state is unchanged but the message is still printed.
+	/// \arg message  The error message to print, if text is supported
+	/// \arg status   The error or warning code that should be represented
+	/// \returns      True if there was a status handler to display the failure
+	inline static bool fail(const wchar_t *message, uefi::status status) {
+		if (!s_current) return false;
+		s_current->do_fail(message, status);
+		return s_current->m_fails_clean;
+	}
+
+protected:
+	static status *s_current;
+	static unsigned s_current_type;
+
+private:
+	bool m_fails_clean;
+};
+
+/// Scoped status line reporter. Prints a message and an "OK" if no errors
+/// or warnings were reported before destruction, otherwise reports the
+/// error or warning.
+class status_line :
+	public status
+{
+public:
+	constexpr static unsigned type = 1;
+
+	/// Constructor.
+	/// \arg message  Description of the operation in progress
+	/// \arg context  If non-null, printed after `message` and a colon
+	/// \arg fails_clean If true, this object can handle printing failure
+	status_line(
+		const wchar_t *message,
+		const wchar_t *context = nullptr,
+		bool fails_clean = true);
+	~status_line();
+
+	virtual void do_warn(const wchar_t *message, uefi::status status) override;
+	virtual void do_fail(const wchar_t *message, uefi::status status) override;
+
+private:
+	void print_status_tag();
+
+	size_t m_line;
+	int m_level;
+	int m_depth;
+
+	status_line *m_outer;
+};
+
+/// Scoped status bar reporter. Draws a row of boxes along the bottom of
+/// the screen, turning one red if there's an error in that step.
+class status_bar :
+	public status
+{
+public:
+	constexpr static unsigned type = 2;
+
+	using framebuffer = kernel::args::framebuffer;
+
+	/// Constructor.
+	/// \arg fb  The framebuffer descriptor to draw to
+	status_bar(kernel::args::framebuffer const &fb);
+	~status_bar();
+
+	virtual void do_warn(const wchar_t *message, uefi::status status) override;
+	virtual void do_fail(const wchar_t *message, uefi::status status) override;
+
+	inline void next() {
+		m_current = s_count++;
+		m_level = 0;
+		m_status = uefi::status::success;
+		draw_box();
+	}
+
+private:
+	void draw_box();
+
+	uint32_t *m_fb;
+	uint32_t m_size;
+	uint32_t m_top;
+	uint32_t m_horiz;
+
+	int m_level;
+	uefi::status m_status;
+
+	uint16_t m_type;
+	uint16_t m_current;
+
+	status_bar *m_outer;
+
+	static unsigned s_count;
+};
+
+} // namespace boot

src/boot/support.cpp

@@ -0,0 +1,39 @@
+#include <stdint.h>
+
+#include "error.h"
+
+extern "C" {
+
+/// Basic memcpy() implementation for clang. Clang requires freestanding code
+/// implement memcpy(), as it may emit references to it. This basic memcpy is
+/// not the most efficient, but will get linked if no other memcpy exists.
+__attribute__ ((__weak__))
+void *memcpy(void *dest, const void *src, size_t n)
+{
+	uint8_t *cdest = reinterpret_cast<uint8_t*>(dest);
+	const uint8_t *csrc = reinterpret_cast<const uint8_t*>(src);
+	for (size_t i = 0; i < n; ++i)
+		cdest[i] = csrc[i];
+	return dest;
+}
+
+/// Basic memset() implementation for clang. Clang requires freestanding code
+/// implement memset(), as it may emit references to it. This basic memset is
+/// not the most efficient, but will get linked if no other memcpy exists.
+__attribute__ ((__weak__))
+void *memset(void *dest, int c, size_t n)
+{
+	uint8_t *cdest = reinterpret_cast<uint8_t*>(dest);
+	for (size_t i = 0; i < n; ++i)
+		cdest[i] = static_cast<uint8_t>(c);
+	return dest;
+}
+
+int _purecall()
+{
+	::boot::error::raise(uefi::status::unsupported, L"Pure virtual call");
+}
+
+} // extern "C"
+
+void operator delete (void *) {}

src/boot/types.h

@@ -0,0 +1,13 @@
+/// \file types.h
+/// Definitions of shared types used throughout the bootloader
+#pragma once
+
+namespace boot {
+
+struct buffer
+{
+	size_t size;
+	void *data;
+};
+
+} // namespace boot

src/boot/utility.c

@@ -1,71 +0,0 @@
-#include "utility.h"
-
-struct error_code_desc {
-	EFI_STATUS code;
-	CHAR16 *name;
-};
-
-// Based off the gnu-efi table
-struct error_code_desc error_table[] = {
-	{ EFI_SUCCESS,               L"Success" },
-	{ EFI_LOAD_ERROR,            L"Load Error" },
-	{ EFI_INVALID_PARAMETER,     L"Invalid Parameter" },
-	{ EFI_UNSUPPORTED,           L"Unsupported" },
-	{ EFI_BAD_BUFFER_SIZE,       L"Bad Buffer Size" },
-	{ EFI_BUFFER_TOO_SMALL,      L"Buffer Too Small" },
-	{ EFI_NOT_READY,             L"Not Ready" },
-	{ EFI_DEVICE_ERROR,          L"Device Error" },
-	{ EFI_WRITE_PROTECTED,       L"Write Protected" },
-	{ EFI_OUT_OF_RESOURCES,      L"Out of Resources" },
-	{ EFI_VOLUME_CORRUPTED,      L"Volume Corrupt" },
-	{ EFI_VOLUME_FULL,           L"Volume Full" },
-	{ EFI_NO_MEDIA,              L"No Media" },
-	{ EFI_MEDIA_CHANGED,         L"Media changed" },
-	{ EFI_NOT_FOUND,             L"Not Found" },
-	{ EFI_ACCESS_DENIED,         L"Access Denied" },
-	{ EFI_NO_RESPONSE,           L"No Response" },
-	{ EFI_NO_MAPPING,            L"No mapping" },
-	{ EFI_TIMEOUT,               L"Time out" },
-	{ EFI_NOT_STARTED,           L"Not started" },
-	{ EFI_ALREADY_STARTED,       L"Already started" },
-	{ EFI_ABORTED,               L"Aborted" },
-	{ EFI_ICMP_ERROR,            L"ICMP Error" },
-	{ EFI_TFTP_ERROR,            L"TFTP Error" },
-	{ EFI_PROTOCOL_ERROR,        L"Protocol Error" },
-	{ EFI_INCOMPATIBLE_VERSION,  L"Incompatible Version" },
-	{ EFI_SECURITY_VIOLATION,    L"Security Policy Violation" },
-	{ EFI_CRC_ERROR,             L"CRC Error" },
-	{ EFI_END_OF_MEDIA,          L"End of Media" },
-	{ EFI_END_OF_FILE,           L"End of File" },
-	{ EFI_INVALID_LANGUAGE,      L"Invalid Languages" },
-	{ EFI_COMPROMISED_DATA,      L"Compromised Data" },
-
-	{ EFI_WARN_UNKOWN_GLYPH,     L"Warning Unknown Glyph" },
-	{ EFI_WARN_DELETE_FAILURE,   L"Warning Delete Failure" },
-	{ EFI_WARN_WRITE_FAILURE,    L"Warning Write Failure" },
-	{ EFI_WARN_BUFFER_TOO_SMALL, L"Warning Buffer Too Small" },
-	{ 0, NULL }
-};
-
-const CHAR16 *
-util_error_message(EFI_STATUS status)
-{
-	int32_t i = -1;
-	while (error_table[++i].name != NULL) {
-		if (error_table[i].code == status) return error_table[i].name;
-	}
-
-	if (EFI_ERROR(status))
-		return L"Unknown Error";
-	else
-		return L"Unknown Warning";
-}
-
-size_t
-wstrlen(const CHAR16 *s)
-{
-	size_t count = 0;
-	while (s && *s++) count++;
-	return count;
-}
-

src/boot/utility.h

@@ -1,34 +0,0 @@
-#include <stddef.h>
-#include <efi/efi.h>
-
-#include "console.h"
-
-#define UNUSED __attribute__((unused))
-
-size_t wstrlen(const CHAR16 *s);
-const CHAR16 *util_error_message(EFI_STATUS status);
-
-#define CHECK_EFI_STATUS_OR_RETURN(s, msg, ...) \
-	if (EFI_ERROR((s))) { \
-		con_printf(L"ERROR: " msg L": %s\r\n", ##__VA_ARGS__, util_error_message(s)); \
-		return (s); \
-	}
-
-#define CHECK_EFI_STATUS_OR_FAIL(s) \
-	if (EFI_ERROR((s))) { \
-		con_status_fail(util_error_message(s)); \
-		while (1) __asm__("hlt"); \
-	}
-
-#define CHECK_EFI_STATUS_OR_ASSERT(s, d) \
-	if (EFI_ERROR((s))) { \
-		__asm__ __volatile__( \
-			"movq %0, %%r8;" \
-			"movq %1, %%r9;" \
-			"movq %2, %%r10;" \
-			"movq $0, %%rdx;" \
-			"divq %%rdx;" \
-			: \
-			: "r"((uint64_t)s), "r"((uint64_t)d), "r"((uint64_t)__LINE__) \
-			: "rax", "rdx", "r8", "r9", "r10"); \
-	}

src/boot/wscript

@@ -1,61 +0,0 @@
-
-def configure(ctx):
-    from os.path import join
-
-    lds_path = join(ctx.env.ARCH_D, "boot.ld")
-
-    ctx.env.append_value('DEFINES_EFI', [
-        'KERNEL_FILENAME=L"{}"'.format(ctx.env.KERNEL_FILENAME),
-        'GNU_EFI_USE_MS_ABI',
-        'HAVE_USE_MS_ABI',
-        'EFI_DEBUG=0',
-        'EFI_DEBUG_CLEAR_MEMORY=0',
-    ])
-    ctx.env.append_value('CFLAGS_EFI', ['-fPIC', '-fshort-wchar'])
-    ctx.env.append_value('LINKFLAGS_EFI', [
-        '-shared',
-        '-T', lds_path,
-    ])
-    ctx.env.append_value('SECTIONS_EFI', [
-    ])
-
-def build(bld):
-    sources = bld.path.ant_glob("**/*.c")
-    sources += bld.path.ant_glob("**/*.s")
-
-    bld.program(
-        source      = sources,
-        target      = "boot.elf",
-        use         = 'EFI',
-    )
-
-    from waflib.Task import Task
-    class make_efi(Task):
-        color = 'YELLOW'
-        def keyword(self):
-            return "Creating"
-        def __str__(self):
-            node = self.outputs[0]
-            return node.path_from(node.ctx.launch_node())
-        def run(self):
-            from subprocess import check_call as call
-
-            args = self.env.objcopy
-            sections = [".text", ".sdata", ".data", ".dynamic",
-                        ".dynsym", ".rel", ".rela", ".reloc"]
-            for s in sections: args.extend(['-j', s])
-            args.append('--target=efi-app-' + self.env.POPCORN_ARCH)
-            args.append(self.inputs[0].abspath())
-            args.append(self.outputs[0].abspath())
-            call(args)
-
-    src = bld.path
-    out = bld.path.get_bld()
-
-    efi = make_efi(env=bld.env)
-    efi.set_inputs([out.make_node("boot.elf")])
-    efi.set_outputs([out.make_node("boot.efi")])
-    bld.add_to_group(efi)
-
-
-# vim: ft=python et sw=4

src/drivers/ahci/driver.cpp

@@ -3,16 +3,20 @@
 #include "log.h"
 #include "pci.h"
 
+namespace ahci {
 
-ahci_driver::ahci_driver()
+
+driver::driver()
 {
 }
 
 void
-ahci_driver::register_device(pci_device *device)
+driver::register_device(pci_device *device)
 {
 	log::info(logs::driver, "AHCI registering device %d:%d:%d:",
 			device->bus(), device->device(), device->function());
 
 	ahci::hba &hba = m_devices.emplace(device);
 }
+
+} // namespace

src/drivers/ahci/driver.h

@@ -6,13 +6,15 @@
 
 class pci_device;
 
+namespace ahci {
+
 
 /// Basic AHCI driver
-class ahci_driver
+class driver
 {
 public:
 	/// Constructor.
-	ahci_driver();
+	driver();
 
 	/// Register a device with the driver
 	/// \arg device  The PCI device to handle
@@ -26,3 +28,4 @@ private:
 	kutil::vector<ahci::hba> m_devices;
 };
 
+} // namespace