5d94525c7a
Kernel: Figure out why a program is misbehaving
2022-11-06 18:12:25 +01:00
c604c074a1
Kernel: Rename ASSERT() to ensure()
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Doesn't get stripped on release builds, so it shouldn't be named assert.
2022-11-02 19:38:15 +01:00
b035795eb3
Kernel: Move errno.h and (k)assert.h out of the main include directory
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This is mostly so IDEs don't pick them up instead of the userspace headers :)
2022-10-19 17:41:23 +02:00
ef8ba3dec4
Kernel: Do not hang when a user task misbehaves
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This was for testing/debugging. But we DEFINITELY don't want that.
2022-10-19 17:25:56 +02:00
62d631f1b4
Kernel: Rename assert.h to kassert.h so IDEs pickup the kernel header instead of the userspace one
2022-10-15 12:56:48 +02:00
ee712432bd
Some more multiple address space stuff
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This page-faults. This is because the memory where the ELF should be is all zeroes, which the CPU tries to interpret.
2022-10-13 21:14:39 +02:00
f83a6ace51
Kernel, libc: Add support for providing a status code to exit()
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The exit() libc function already accepted an integer, but didn't pass it on to the kernel since we had no mechanism for it to do that.
Now, the kernel stores a task's exit status to display it later (and in the future, return it to userspace via wait()/waitpid())
2022-10-08 17:56:40 +02:00
f25014a8ed
refine syscalls
2022-09-29 19:17:43 +02:00
46f459337c
Interrupts: Remove ensure_handler and use a more reliable way of detecting if we are in a handler
2022-09-29 18:35:51 +02:00
f1a7138568
User mode (with a few syscalls)
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IT ACTUALLY WORKS NOW.
Why wasn't it working? Oh, because I was not setting already present page tables's permissions to user mode. Just a little bug. THAT I SPENT DAYS TRYING TO FIND
Anyways, it works now. Such a relief...
2022-09-25 20:35:05 +02:00
aee4e55fdd
add a proper kernel panic
2022-09-25 16:56:00 +02:00
ec01dc2927
Scheduler: Change fixed Task array for (highly inefficient) memory allocation, add userspace task support (which as memory is mapped kernel-only instantly crashes), and support for exiting a task (marking it as exited and reaping it later)
2022-09-21 21:06:00 +02:00
49ddb47ad4
Reorganize structure
2022-09-21 17:56:53 +02:00
1c12cf016e
Add a Scheduler.
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Finally.
Just Round Robin with sleeping, but it's still awesome. I think this can finish v0.3, with a few adjustments.
2022-09-20 19:58:04 +02:00
e6c6a1677a
Rename "SavedContext" to "Context"
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Seemed like a more appropriate name.
2022-09-20 19:56:43 +02:00
5ee8e17b76
Ensure we are in an interrupt in the interrupt handler
2022-09-20 17:16:23 +02:00
ee8c2759a6
Got a stack tracer working!!
2022-09-19 21:11:43 +02:00
f7e7a6661d
Use kernel logging in interrupts instead of plain old printf()
2022-09-18 09:43:58 +02:00
0cb59ee17f
please work please
2022-09-11 08:23:32 +02:00
b4484e951d
LOTS MORE LOGGING. which is great, of course.
2022-09-07 19:41:08 +02:00
97aef95daa
Fix format specifiers
2022-09-06 18:31:27 +02:00
bd0a24097f
Add a KernelMemoryManager namespace to wrap PMM + VMM
2022-09-06 18:08:15 +02:00
1367e88d88
Finally implement %l and %z format modifiers
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Finally, we can use %zx with a 64-bit number instead of %x%x with 2 32-bit values split from a 64-bit number!
2022-09-05 16:59:45 +02:00
1b727a66ea
Ready. Set. Go!
2022-09-05 16:13:51 +02:00
