kitten/Meowth
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Meowth v0.1

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This commit is contained in:
Ash Logan 2022-10-24 21:57:58 +11:00
commit c287250b88
14 changed files with 76 additions and 234 deletions
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17
src/patcher/patcher.cpp
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@ -4,6 +4,7 @@
#include <kernel/kernel.h>
#include <coreinit/memorymap.h>
#include <coreinit/cache.h>
bool replace_string(uint32_t start, uint32_t size, const char* original_val, size_t original_val_sz, const char* new_val, size_t new_val_sz) {
for (uint32_t addr = start; addr < start + size - original_val_sz; addr++) {
@ -18,3 +19,19 @@ bool replace_string(uint32_t start, uint32_t size, const char* original_val, siz
return false;
}
bool PatchInstruction(void* instr, uint32_t original, uint32_t replacement) {
uint32_t current = *(uint32_t*)instr;
DEBUG_FUNCTION_LINE("current instr %08x", current);
if (current != original) return current == replacement;
KernelCopyData(OSEffectiveToPhysical((uint32_t)instr), OSEffectiveToPhysical((uint32_t)&replacement), sizeof(replacement));
//Only works on AROMA! WUPS 0.1's KernelCopyData is uncached, needs DCInvalidate here instead
DCFlushRange(instr, 4);
ICInvalidateRange(instr, 4);
current = *(uint32_t*)instr;
DEBUG_FUNCTION_LINE("patched instr %08x", current);
return true;
}