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FunctionPatcherModule
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Simplify the cache flushing

This commit is contained in:
Maschell 2020-06-13 13:10:17 +02:00
parent 64a2b952ba
commit b817663d47
1 changed files with 10 additions and 23 deletions
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33
source/function_patcher.cpp
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@ -1,4 +1,3 @@
#include <coreinit/dynload.h>
#include <coreinit/cache.h>
#include <coreinit/debug.h>
@ -38,11 +37,6 @@ void writeDataAndFlushIC(CThread *thread, void *arg) {
void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uint32_t size) {
uint32_t skip_instr = 1;
uint32_t my_instr_len = 4;
uint32_t instr_len = my_instr_len + skip_instr + 15;
uint32_t flush_len = 4 * instr_len;
for (uint32_t i = 0; i < size; i++) {
function_replacement_data_t *function_data = &replacements[i];
/* Patch branches to it. */
@ -116,19 +110,12 @@ void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uin
space++;
//Only works if skip_instr == 1
if (skip_instr == 1) {
// fill the restore instruction section
function_data->realAddr = real_addr;
function_data->restoreInstruction = space[-1];
if (DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("function_data->realAddr = %08X!", function_data->realAddr);
}
if (DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("function_data->restoreInstruction = %08X!", function_data->restoreInstruction);
}
} else {
WHBLogWritef("Error. Can't save %s for restoring!", function_data->function_name);
// fill the restore instruction section
function_data->realAddr = real_addr;
function_data->restoreInstruction = space[-1];
if (DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("function_data->realAddr = %08X!", function_data->realAddr);
DEBUG_FUNCTION_LINE("function_data->restoreInstruction = %08X!", function_data->restoreInstruction);
}
/*
@ -138,9 +125,9 @@ void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uin
00808d08 4e800420 bctr
*/
*space = 0x3d600000 | (((real_addr + (skip_instr * 4)) >> 16) & 0x0000FFFF);
*space = 0x3d600000 | (((real_addr + 4) >> 16) & 0x0000FFFF);
space++; // lis r11 ,0x1234
*space = 0x616b0000 | ((real_addr + (skip_instr * 4)) & 0x0000ffff);
*space = 0x616b0000 | ((real_addr + 4) & 0x0000ffff);
space++; // ori r11 ,r11 ,0x5678
*space = 0x7d6903a6;
space++; // mtspr CTR ,r11
@ -172,8 +159,6 @@ void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uin
*space = 0x4e800420;
space++; // bctr
DCFlushRange((void *) (((uint32_t) space) - flush_len), flush_len);
ICInvalidateRange((void *) (((uint32_t) space) - flush_len), flush_len);
if ((repl_addr_test & 0x03fffffc) != repl_addr_test) {
OSFatal("Jump is impossible");
@ -181,6 +166,8 @@ void FunctionPatcherPatchFunction(function_replacement_data_t *replacements, uin
//setting jump back
uint32_t replace_instr = 0x48000002 | (repl_addr_test & 0x03fffffc);
DCFlushRange((void *) function_data->replace_data, FUNCTION_PATCHER_METHOD_STORE_SIZE * 4);
ICInvalidateRange((void *) function_data->replace_data, FUNCTION_PATCHER_METHOD_STORE_SIZE * 4);
uint32_t data[] = {
replace_instr,