diff options
Diffstat (limited to 'src/Dolphin')
| -rw-r--r-- | src/Dolphin/os/__start.c | 150 |
1 files changed, 82 insertions, 68 deletions
diff --git a/src/Dolphin/os/__start.c b/src/Dolphin/os/__start.c index 1113e15..cebb086 100644 --- a/src/Dolphin/os/__start.c +++ b/src/Dolphin/os/__start.c @@ -1,48 +1,52 @@ -// This file was taken from the Metroid Prime decompilation project. -// https://github.com/PrimeDecomp/prime/blob/main/src/Dolphin/os/__start.c +// This file was taken from the Super Mario Sunshine decompilation project. +// https://github.com/doldecomp/sms/blob/master/src/os/__start.c #include "dolphin/__start.h" -#include "__ppc_eabi_linker.h" -void __check_pad3(void) { - if ((Pad3Button & 0x0eef) == 0x0eef) { - OSResetSystem(OS_RESET_RESTART, 0, FALSE); - } - return; +#pragma section code_type ".init" + +void __check_pad3(void) +{ + if ((Pad3Button & 0x0eef) == 0x0eef) { + OSResetSystem(OS_RESET_RESTART, 0, FALSE); + } + return; } -__declspec(weak) asm void __start(void) { - // clang-format off - nofralloc +// clang-format off + +__declspec (weak) asm void __start(void) +{ + nofralloc bl __init_registers - bl __init_hardware - li r0, -1 - stwu r1, -8(r1) - stw r0, 4(r1) - stw r0, 0(r1) - bl __init_data - li r0, 0 - lis r6, EXCEPTIONMASK_ADDR@ha - addi r6, r6, EXCEPTIONMASK_ADDR@l - stw r0, 0(r6) - lis r6, BOOTINFO2_ADDR@ha - addi r6, r6, BOOTINFO2_ADDR@l - lwz r6, 0(r6) + bl __init_hardware + li r0, -1 + stwu r1, -8(r1) + stw r0, 4(r1) + stw r0, 0(r1) + bl __init_data + li r0, 0 + lis r6, EXCEPTIONMASK_ADDR@ha + addi r6, r6, EXCEPTIONMASK_ADDR@l + stw r0, 0(r6) + lis r6, BOOTINFO2_ADDR@ha + addi r6, r6, BOOTINFO2_ADDR@l + lwz r6, 0(r6) _check_TRK: - cmplwi r6, 0 - beq _load_lomem_debug_flag - lwz r7, OS_BI2_DEBUGFLAG_OFFSET(r6) - b _check_debug_flag + cmplwi r6, 0 + beq _load_lomem_debug_flag + lwz r7, OS_BI2_DEBUGFLAG_OFFSET(r6) + b _check_debug_flag _load_lomem_debug_flag: lis r5, ARENAHI_ADDR@ha addi r5, r5, ARENAHI_ADDR@l - lwz r5, 0(r5) - cmplwi r5, 0 - beq _goto_main - lis r7, DEBUGFLAG_ADDR@ha - addi r7, r7, DEBUGFLAG_ADDR@l - lwz r7, 0(r7) + lwz r5, 0(r5) + cmplwi r5, 0 + beq _goto_main + lis r7, DEBUGFLAG_ADDR@ha + addi r7, r7, DEBUGFLAG_ADDR@l + lwz r7, 0(r7) _check_debug_flag: li r5, 0 @@ -100,22 +104,21 @@ _end_of_parseargs: beq _check_pad3 andi. r3, r3, 0x7fff cmplwi r3, 1 - bne _goto_skip_init_bba + bne _skip_crc _check_pad3: bl __check_pad3 -_goto_skip_init_bba: +_skip_crc: bl __init_user mr r3, r14 mr r4, r15 bl main b exit - // clang-format on } -asm static void __init_registers(void) { - // clang-format off +asm static void __init_registers(void) +{ nofralloc lis r1, _stack_addr@h ori r1, r1, _stack_addr@l @@ -124,40 +127,51 @@ asm static void __init_registers(void) { lis r13, _SDA_BASE_@h ori r13, r13, _SDA_BASE_@l blr - // clang-format on } -inline static void __copy_rom_section(void* dst, const void* src, unsigned long size) { - if (size && (dst != src)) { - memcpy(dst, src, size); - __flush_cache(dst, size); - } +__declspec(section ".init") extern __rom_copy_info _rom_copy_info[]; +__declspec(section ".init") extern __bss_init_info _bss_init_info[]; + +// clang-format on + +inline static void __copy_rom_section(void* dst, const void* src, + unsigned long size) +{ + if (size && (dst != src)) { + memcpy(dst, src, size); + __flush_cache(dst, size); + } } -inline static void __init_bss_section(void* dst, unsigned long size) { - if (size) { - memset(dst, 0, size); - } +inline static void __init_bss_section(void* dst, unsigned long size) +{ + if (size) { + memset(dst, 0, size); + } } #pragma scheduling off -void __init_data(void) { - __rom_copy_info* dci; - __bss_init_info* bii; - - dci = _rom_copy_info; - while (TRUE) { - if (dci->size == 0) - break; - __copy_rom_section(dci->addr, dci->rom, dci->size); - dci++; - } - - bii = _bss_init_info; - while (TRUE) { - if (bii->size == 0) - break; - __init_bss_section(bii->addr, bii->size); - bii++; - } +#pragma peephole off +// peephole might have been turned off due to the inline asm peephole bug +// which turns off peephole optimizations after an inline-asm function +void __init_data(void) +{ + __rom_copy_info* dci; + __bss_init_info* bii; + + dci = _rom_copy_info; + while (TRUE) { + if (dci->size == 0) + break; + __copy_rom_section(dci->addr, dci->rom, dci->size); + dci++; + } + + bii = _bss_init_info; + while (TRUE) { + if (bii->size == 0) + break; + __init_bss_section(bii->addr, bii->size); + bii++; + } } |