mirror of
https://github.com/open-goal/jak-project
synced 2026-05-23 15:02:01 -04:00
water111
4f537d4a71
This sets up the C Kernel for Jak 3, and makes it possible to build and load code built with `goalc --jak3`. There's not too much interesting here, other than they switched to a system where symbol IDs (unique numbers less than 2^14) are generated at compile time, and those get included in the object file itself. This is kind of annoying, since it means all tools that produce a GOAL object file need to work together to assign unique symbol IDs. And since the symbol IDs can't conflict, and are only a number between 0 and 2^14, you can't just hash and hope for no collisions. We work around this by ignoring the IDs and re-assigning our own. I think this is very similar to what the C Kernel did on early builds of Jak 3 which supported loading old format level files, which didn't have the IDs included. As far as I can tell, this shouldn't cause any problems. It defeats all of their fancy tricks to save memory by not storing the symbol string, but we don't care.
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
#pragma once
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#include "common/common_types.h"
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#include "game/kernel/common/Ptr.h"
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/*!
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* A kheap has a top/bottom linear allocator
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*/
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struct kheapinfo {
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Ptr<u8> base; //! beginning of heap
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Ptr<u8> top; //! current location of bottom of top allocations
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Ptr<u8> current; //! current location of top of bottom allocations
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Ptr<u8> top_base; //! end of heap
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};
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// Kernel heaps
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extern Ptr<kheapinfo> kglobalheap;
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extern Ptr<kheapinfo> kdebugheap;
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extern bool kheaplogging;
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// flags for kmalloc/ksmalloc
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constexpr u32 KMALLOC_TOP = 0x2000; //! Flag to allocate temporary memory from heap top
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constexpr u32 KMALLOC_MEMSET = 0x1000; //! Flag to clear memory
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constexpr u32 KMALLOC_ALIGN_256 = 0x100;
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constexpr u32 KMALLOC_ALIGN_64 = 0x40;
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constexpr u32 KMALLOC_ALIGN_16 = 0x10;
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void kmalloc_init_globals_common();
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Ptr<u8> ksmalloc(Ptr<kheapinfo> heap, s32 size, u32 flags, char const* name);
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Ptr<kheapinfo> kheapstatus(Ptr<kheapinfo> heap);
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Ptr<kheapinfo> kinitheap(Ptr<kheapinfo> heap, Ptr<u8> mem, s32 size);
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u32 kheapused(Ptr<kheapinfo> heap);
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Ptr<u8> kmalloc(Ptr<kheapinfo> heap, s32 size, u32 flags, char const* name);
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void kfree(Ptr<u8> a); |