justin/jsix_import
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10 Commits

Author SHA1 Message Date
Justin C. Miller
c605793a9d Fix fork() for new task switching model 2019-04-03 10:08:26 -07:00
Justin C. Miller
11a53e792f Improve syscalls for new task switching 
There are a lot of under the hood changes here:
- Move syscalls to be a dispatch table, defined by syscalls.inc
- Don't need a full process state (push_all) in syscalls now
- In push_all, define REGS instead of using offsets
- Save TWO stack pointers as well as current saved stack pointer in TCB:
  - rsp0 is the base of the kernel stack for interrupts
  - rsp3 is the saved user stack from cpu_data
- Update syscall numbers in nulldrv
- Some asm-debugging enhancements to the gdb script
- fork() still not working
 2019-04-02 00:25:36 -07:00
Justin C. Miller
ca2362f858 Simplify task switches 
No longer using the rsp from the entry to the kernel, but instead
switching rsp at task-switching time in assembly.

This currently breaks fork()
 2019-03-31 22:49:24 -07:00
Justin C. Miller
9067f8d298 Add kernel logging task 
- Enable creating kernel tasks
- Create kernel task that disables immediate-mode logging and prints
  logs to the console forever
 2019-03-20 23:45:01 -07:00
Justin C. Miller
be007c6278 Implement exit syscall 2019-03-14 22:28:21 -07:00
Justin C. Miller
97ac3c09fa Implement initial fork syscall 2019-03-09 12:18:21 -08:00
Justin C. Miller
aca442ee87 First pass at message syscalls 2019-02-07 18:19:22 -08:00
Justin C. Miller
cef0a71bce Use uintptr_t instead of addr_t 
They're never actually going to change independently, and it's also
brining in kutil headers more places than they should be.
 2018-09-20 09:37:30 -07:00
Justin C. Miller
c67c1bd6a2 Give processes multiple quanta before rescheduling 2018-09-16 23:34:42 -07:00
Justin C. Miller
482b9f50fc Initial process waiting/waking 
Processes can now wait on signals/children/time. There is no clock
currently so "time" is just a monotonically increating tick count. Added
a SLEEP syscall to test this waiting/waking.
 2018-09-16 12:22:52 -07:00