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FunctionPatcherModule
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Add support for "per process"-patches

This commit is contained in:
Maschell 2020-06-13 13:59:29 +02:00
parent dcff18577f
commit 1383ca2d8e
1 changed files with 26 additions and 20 deletions
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46
source/function_patcher.cpp
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@ -135,30 +135,36 @@ void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uin
//setting jump back
uint32_t replace_instr = 0x48000002 | (repl_addr & 0x03FFFFFC);
// If the jump is too big we need a trampoline
if (repl_addr > 0x03FFFFFC) {
// If the jump is too big or we want only patch for certain processes we need a trampoline
if (repl_addr > 0x03FFFFFC || function_data->targetProcess != FP_TARGET_PROCESS_ALL) {
uint32_t repl_addr_test = (uint32_t) space;
/*
// Only use patched function if OSGetUPID is 2 (wii u menu) or 15 (game)
*space = 0x3d600000 | (((uint32_t*) OSGetUPID)[0] & 0x0000FFFF); space++; // lis r11 ,0x0
*space = 0x816b0000 | (((uint32_t*) OSGetUPID)[1] & 0x0000FFFF); space++; // lwz r11 ,0x0(r11)
*space = 0x2c0b0000 | 0x00000002; space++; // cmpwi r11 ,0x2
*space = 0x41820000 | 0x00000020; space++; // beq myfunc
*space = 0x2c0b0000 | 0x0000000F; space++; // cmpwi r11 ,0xF
*space = 0x41820000 | 0x00000018; space++; // beq myfunc
*space = 0x3d600000 | (((real_addr + (skip_instr * 4)) >> 16) & 0x0000FFFF); space++; // lis r11 ,0x1234
*space = 0x616b0000 | ((real_addr + (skip_instr * 4)) & 0x0000ffff); space++; // ori r11 ,r11 ,0x5678
*space = 0x7d6903a6; space++; // mtspr CTR ,r11
*space = function_data->restoreInstruction; space++; //
*space = 0x4e800420; space++; // bctr*/
if(function_data->targetProcess != FP_TARGET_PROCESS_ALL){
// Only use patched function if OSGetUPID matches function_data->targetProcess
*space = 0x3d600000 | (((uint32_t*) OSGetUPID)[0] & 0x0000FFFF); space++; // lis r11 ,0x0
*space = 0x816b0000 | (((uint32_t*) OSGetUPID)[1] & 0x0000FFFF); space++; // lwz r11 ,0x0(r11)
if(function_data->targetProcess == FP_TARGET_PROCESS_GAME_AND_MENU){
*space = 0x2c0b0000 | FP_TARGET_PROCESS_WII_U_MENU; space++; // cmpwi r11 ,FP_TARGET_PROCESS_WII_U_MENU
*space = 0x41820000 | 0x00000020; space++; // beq myfunc
*space = 0x2c0b0000 | FP_TARGET_PROCESS_GAME; space++; // cmpwi r11 ,FP_TARGET_PROCESS_GAME
*space = 0x41820000 | 0x00000018; space++; // beq myfunc
} else {
*space = 0x2c0b0000 | function_data->targetProcess; space++; // cmpwi r11 ,function_data->targetProcess
*space = 0x41820000 | 0x00000018; space++; // beq myfunc
}
*space = 0x3d600000 | (((real_addr + 4) >> 16) & 0x0000FFFF); space++; // lis r11 ,(real_addr + 4)@hi
*space = 0x616b0000 | ((real_addr + 4) & 0x0000ffff); space++; // ori r11 ,(real_addr + 4)@lo
*space = 0x7d6903a6; space++; // mtspr CTR ,r11
*space = function_data->restoreInstruction; space++; //
*space = 0x4e800420; space++; // bctr
}
// myfunc:
*space = 0x3d600000 | (((repl_addr) >> 16) & 0x0000FFFF); space++; // lis r11 ,0x1234
*space = 0x616b0000 | ((repl_addr) & 0x0000ffff); space++; // ori r11 ,r11 ,0x5678
*space = 0x7d6903a6; space++; // mtspr CTR ,r11
*space = 0x4e800420; space++; // bctr
*space = 0x3d600000 | (((repl_addr) >> 16) & 0x0000FFFF); space++; // lis r11 ,repl_addr@hi
*space = 0x616b0000 | ((repl_addr) & 0x0000ffff); space++; // ori r11 ,r11 ,repl_addr@lo
*space = 0x7d6903a6; space++; // mtspr CTR ,r11
*space = 0x4e800420; space++; // bctr
// Make sure the trampoline itself is usable.
if ((repl_addr_test & 0x03fffffc) != repl_addr_test) {
if ((repl_addr_test & 0x03FFFFFC) != repl_addr_test) {
OSFatal("Jump is impossible");
}