From 3d0b262435271460d45a253e6a54b93b90f67361 Mon Sep 17 00:00:00 2001
From: "Justin C. Miller" <justin@devjustinian.com>
Date: Wed, 5 Sep 2018 23:00:23 -0700
Subject: [PATCH] Add null driver

This will be the target of our real ELF loader
---
 assets/initrd.manifest       |  3 ++-
 src/drivers/nulldrv/main.cpp |  1 +
 src/drivers/nulldrv/main.s   | 11 +++++++++++
 src/drivers/nulldrv/wscript  | 15 +++++++++++++++
 4 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 src/drivers/nulldrv/main.cpp
 create mode 100644 src/drivers/nulldrv/main.s
 create mode 100644 src/drivers/nulldrv/wscript

diff --git a/assets/initrd.manifest b/assets/initrd.manifest
index 0e1eef6..ca70342 100644
--- a/assets/initrd.manifest
+++ b/assets/initrd.manifest
@@ -1 +1,2 @@
-assets/fonts/tamsyn8x16r.psf screenfont.psf
+#assets/fonts/tamsyn8x16r.psf screenfont.psf
+build/kernel/src/drivers/nulldrv/nulldrv nulldrv
diff --git a/src/drivers/nulldrv/main.cpp b/src/drivers/nulldrv/main.cpp
new file mode 100644
index 0000000..60d7ba6
--- /dev/null
+++ b/src/drivers/nulldrv/main.cpp
@@ -0,0 +1 @@
+int main(int argc, const char **argv) { return 0; }
diff --git a/src/drivers/nulldrv/main.s b/src/drivers/nulldrv/main.s
new file mode 100644
index 0000000..cbb0009
--- /dev/null
+++ b/src/drivers/nulldrv/main.s
@@ -0,0 +1,11 @@
+global _start
+_start:
+	xor rbp, rbp	; Sentinel rbp
+
+	pop rsi			; My PID
+	mov rdi, 0		; DEBUG syscall
+
+.loop:
+	syscall
+	jmp .loop
+
diff --git a/src/drivers/nulldrv/wscript b/src/drivers/nulldrv/wscript
new file mode 100644
index 0000000..16adcf4
--- /dev/null
+++ b/src/drivers/nulldrv/wscript
@@ -0,0 +1,15 @@
+
+def configure(ctx):
+    pass
+
+def build(bld):
+    sources = bld.path.ant_glob("**/*.cpp")
+    sources += bld.path.ant_glob("**/*.s")
+
+    bld.program(
+        source = sources,
+        name = 'nulldrv',
+        target = 'nulldrv',
+    )
+
+# vim: ft=python et