mirror of
https://github.com/Xeeynamo/sotn-decomp.git
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76d1584c89
This replaces several dozen BIOS trampolines from the extracted ASM to "decompiled" source. These are modeled on the `INCLUDE_ASM` macro, but generate the instructions necessary for each trampoline directly instead of importing an extracted source file. Because these trampolines never return, and GCC 2.6 doesnt appear to have builtins for leaving off the return jump postamble, these will likely need to remain assembly. This also changes the `main.elf` target to depend on `main.ld`, and undefined symbols files, allowing `make build` to regenerate those files if necessary. Co-authored-by: Jonathan Hohle <jon@ttkb.co>
56 lines
3.4 KiB
C
56 lines
3.4 KiB
C
#ifndef BIOS_H
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#define BIOS_H
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#include "common.h"
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// Defines the syscall stub for various functions
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#define BIOS_FUNCTION(name, section, id) \
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__asm__( \
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".pushsection .text\n" \
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"\t.align\t2\n" \
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"\t.globl\t" #name "\n" \
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"\t.ent\t" #name "\n" \
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"" #name " :\n" \
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".set noat\n" \
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".set noreorder\n" \
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"\n" \
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"glabel " #name "\n" \
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"\taddiu $t2, $zero, " #section "\n" \
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"\tjr $t2\n" \
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"\t addiu $t1, $zero, " #id "\n" \
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"\tnop\n" \
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".size " #name ", . - " #name "\n" \
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"\t.set reorder\n" \
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"\t.set at\n" \
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"\t.end\t" #name "\n" \
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".popsection");
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#define BIOS_A_FUNCTION(name, id) BIOS_FUNCTION(name, 0xA0, id)
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#define BIOS_B_FUNCTION(name, id) BIOS_FUNCTION(name, 0xB0, id)
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#define BIOS_C_FUNCTION(name, id) BIOS_FUNCTION(name, 0xC0, id)
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#define SYSCALL(name, number) \
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__asm__( \
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".pushsection .text\n" \
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"\t.align\t2\n" \
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"\t.globl\t" #name "\n" \
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"\t.ent\t" #name "\n" \
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"" #name " :\n" \
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".set noat\n" \
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".set noreorder\n" \
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"\n" \
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"glabel " #name "\n" \
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"\taddiu $a0, $zero, " #number "\n" \
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"\tsyscall 0\n" \
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"\tjr $ra\n" \
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"\tnop\n" \
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".size " #name ", . - " #name "\n" \
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"\t.set reorder\n" \
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"\t.set at\n" \
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"\t.end\t" #name "\n" \
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".popsection");
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#endif // BIOS_H
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