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14 commits

Author SHA1 Message Date
Andreas Kling
85bcf2ed0f Add getgid() and getpid() syscalls. Prep for LibC. 2018-10-22 13:55:11 +02:00
Andreas Kling
3a3c57357c Add a sys$exit and make init_stage2 call it when finished. 2018-10-22 11:43:55 +02:00
Andreas Kling
79ffdb7205 A lot of hacking:
- More work on funneling console output through Console.
- init() now breaks off into a separate task ASAP.
- ..this leaves the "colonel" task as a simple hlt idle loop.
- Mask all IRQs on startup (except IRQ2 for slave passthru)
- Fix underallocation bug in Task::allocateRegion().
- Remember how many times each Task has been scheduled.

The panel and scheduling banner are disabled until I get things
working nicely in the (brave) new Console world.
2018-10-22 11:15:16 +02:00
Andreas Kling
dd6706a1a1 Fix null deref in contextSwitch(). 2018-10-21 21:57:43 +02:00
Andreas Kling
46ff281695 Turn the syscall interrupt into a trap (by switching the gate type.)
This leaves interrupts enabled while we're in the kernel, which is
precisely what we want.

This uncovered a horrendous problem with kernel tasks silently
overflowing their stacks. For now I've simply increased the stack size
but I need a more MMU-y solution for this eventually.
2018-10-19 11:31:18 +02:00
Andreas Kling
3649638259 Add Regions concept to Task. 2018-10-18 14:55:20 +02:00
Andreas Kling
f67d695254 More paging stuff.
The test userspace process now runs at linear address 0x300000 which is
mapped to a dynamically allocated page from the MemoryManager. Cool!
2018-10-18 13:05:00 +02:00
Andreas Kling
89851a9ded Use FileHandle from VFS. 2018-10-18 10:28:09 +02:00
Andreas Kling
9d5de91cf3 Actually destroy tasks after they crash. 2018-10-18 00:26:30 +02:00
Andreas Kling
56c1f9db8e A userspace process can now GPF and the OS goes on!
This is really rickety, but it kinda sorta works for my test GPF!
2018-10-17 23:49:32 +02:00
Andreas Kling
77299cf54d Add basic paging. Only identity maps the bottom 4MB as a start. 2018-10-17 23:13:55 +02:00
Andreas Kling
9171521752 Integrate ext2 from VFS into Kernel. 2018-10-17 10:57:23 +02:00
Andreas Kling
72bb80a9ae These changes were lying around uncommitted in the old repo.
I'm just gonna commit them without too much thinking and then take
it from there.
2018-10-16 11:06:35 +02:00
Andreas Kling
9396108034 Import the "gerbert" kernel I worked on earlier this year.
It's a lot crappier than I remembered it. It's gonna need a lot of work.
2018-10-16 11:02:00 +02:00