a243dd6dec
core: Reserve kernel physical pages + provide our own stack
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This solves a very weird bug that occurred when we allocated a page that was already used for the stack.
2025-02-24 19:16:35 +01:00
f8182bd386
init: Use getThreadId() instead of relying on a fixed PID
2025-02-22 23:01:48 +01:00
b4f25a2e1f
system+init: Move userspace virtual memory code to the system library
2025-02-22 23:01:32 +01:00
6e97a89f22
core: Reserve multiboot tags and module memory + load all modules as independent threads instead of just init
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Only init is started though, other modules are left in a dormant state so init can do whatever it wants and adjust them according to its needs before running them.
2025-02-22 23:00:53 +01:00
d029d3cf46
core+system: Add a bunch of syscalls related to thread creation
2025-02-22 22:58:56 +01:00
c6df22ee39
core: Allow for non-const pointers in findMultibootTags()
2025-02-22 22:57:33 +01:00
c268c48c8e
system: Fix syscall return value constraint
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The previous constraint was making the compiler discard the return value when building in release mode.
2025-02-22 22:57:10 +01:00
6691f940e4
system: Add comments to indicate which syscalls need which tokens
2025-02-22 20:13:17 +01:00
2c5152ecc3
core: Add "tokens" to determine what processes can call which syscalls
2025-02-22 20:11:07 +01:00
e7e66a95f4
core: Remove excessive ELF debug printing
2025-02-22 15:52:36 +01:00
c80c7bbc6e
core+init: Instead of exporting an "arch" symbol for platform-specific code, use "usingnamespace".
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This makes imports of platform-specific files way cleaner.
2025-02-22 15:49:14 +01:00
cc87bf18c9
core+init: Move syscall code from init to the system library + add a setEventQueue() syscall
2025-02-22 15:41:11 +01:00
ee7185bb83
core: Add an "event queue" to threads using a ring buffer updated by the kernel
2025-02-22 15:39:21 +01:00
daea80cea6
core: Fix alignment in lookupThreadById()
2025-02-22 15:38:23 +01:00
6a441b9b6d
core+system: Add a new "system library" with a shared memory ring buffer implementation
2025-02-22 15:37:22 +01:00
32ecd325e3
readme: Correct link to easyboot's LICENSE file
2025-02-21 20:35:32 +01:00
95dbd68de2
Update README.md
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Basic scheduling is now (mostly) done.
2025-02-21 19:49:03 +01:00
9d26113ca9
core: Separate thread.arch from other imports
2025-02-21 19:44:54 +01:00
c1956748f3
core: Add a struct named "platform.Registers" to cover different architectures
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This replaces the architecture-independent usage of InterruptStackFrame, which is an x86_64 implementation thing.
2025-02-21 19:40:46 +01:00
7665e4cbb6
core: Add documentation to all scheduler functions + global thread list
2025-02-21 19:37:13 +01:00
50e7b6cca7
core: Check the stack is in user memory before changing it to kernel space
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Otherwise, we're just adding the physical base to an address that's already in the higher half.
2025-02-21 18:47:24 +01:00
9acbc45a80
core: Make thread.enterTask() automatically set the thread state to Running
2025-02-21 18:40:29 +01:00
c722341d3f
core: Change naming for virtual memory structures to reflect x86_64 terms
2025-02-21 18:33:36 +01:00
e6bc3afcb8
init: Fix a few errors
2025-02-20 23:01:56 +01:00
5cb9689d10
core: Don't set the second thread argument to zero
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This defeated the point of passing the page tables to init, since rsi would be set to zero anyway.
2025-02-20 23:01:28 +01:00
b2d89ab4fd
init: Add basic virtual memory code
2025-02-20 18:05:11 +01:00
2ecd24df82
core: Add some annotations to managed thread variables
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Some thread variables don't need to be set manually,
since they are updated whenever needed by some functions.
Add comments to make that clear.
2025-02-20 17:59:27 +01:00
8ea5df2e4e
core: Give init a pointer to its own page tables
2025-02-20 17:57:50 +01:00
0782ff5fe7
core/x86_64: Fix function naming style
2025-02-20 17:55:56 +01:00
b14c473a29
core: Make some functions in thread.zig private
2025-02-18 20:10:14 +01:00
0ee587a142
core: Add sleep support to the scheduler
2025-02-18 20:06:40 +01:00
e27ef97682
core: Set new threads' priority to 127
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This is halfway through the priority range, so user processes can either lower or raise their priority from the default.
2025-02-18 19:30:46 +01:00
9cdf9aa71b
core/x86_64: Make in/out wrappers inline
2025-02-17 23:04:58 +01:00
c455e8ea0b
core: Fix a small error in thread.zig
2025-02-17 23:04:43 +01:00
f0d5b60b83
core: Add priority-based scheduling
2025-02-17 20:15:30 +01:00
0edcae7aae
core: Store the physical page directory alongside the virtual pointer to it
2025-02-16 13:20:02 +01:00
d7557d84f7
init: Add system call handling code
2025-02-16 11:58:20 +01:00
46a0c8c800
core: Add memory and scheduler related system calls
2025-02-16 11:58:12 +01:00
5eabb6bdf0
core: Add PIT timer code to preempt the scheduler
2025-02-16 11:58:01 +01:00
c86481f2e7
core: Allocate a stack for each core's idle thread
2025-02-16 11:57:27 +01:00
6a2323c16b
core: Add thread states
2025-02-16 11:57:04 +01:00
77cee5aeb0
core: Add global FrameAllocator with locking
2025-02-16 11:56:14 +01:00
2fd618173f
core: Add spinlock code
2025-02-16 11:52:45 +01:00
09fb2b6554
core: Fix a few bugs in threading code
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g_threads is processor-specific now, so it's unused, and setPageDirectory() needs the physical address.
2025-02-15 22:58:34 +01:00
2f77128437
Update README.md
2025-02-15 22:55:13 +01:00
614ed80980
core: Add a simple ELF loader
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We only need the ELF loader for init, and possibly a few other modules. The bulk of loading executables is going to be done by userspace, so we only need the basics here.
2025-02-15 22:46:28 +01:00
985d8fec0a
core: Add basic threading code
2025-02-15 22:45:32 +01:00
14578a0fee
core/x86_64: Set up a second stack in the TSS to handle system calls
2025-02-15 22:40:48 +01:00
654b228f10
core: Fix a couple of bugs in VMM and add a few utility functions
2025-02-15 22:23:00 +01:00
ffa9b78bf7
core/x86_64: Enable the NX bit before using it
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Spent an embarrassing amount of time trying to figure out why there was a page fault with "reserved bits set". Turns out, I had set the NX bit without enabling it.
2025-02-15 22:22:04 +01:00
