FunctionPatcherModule/source/FunctionAddressProvider.cpp

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#include "FunctionAddressProvider.h"
#include "utils/logger.h"
#include <coreinit/dynload.h>
#include <function_patcher/fpatching_defines.h>
uint32_t FunctionAddressProvider::getEffectiveAddressOfFunction(function_replacement_library_type_t library, const char *functionName) {
uint32_t real_addr = 0;
OSDynLoad_Module rpl_handle = nullptr;
OSDynLoad_Error err = OS_DYNLOAD_OK;
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for (auto &rplHandle : rpl_handles) {
if (rplHandle.library == library) {
if (rplHandle.handle == nullptr) {
DEBUG_FUNCTION_LINE_VERBOSE("Lets acquire handle for rpl: %s", rplHandle.rplname);
err = OSDynLoad_IsModuleLoaded((char *) rplHandle.rplname, &rplHandle.handle);
}
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if (err != OS_DYNLOAD_OK || !rplHandle.handle) {
DEBUG_FUNCTION_LINE_VERBOSE("%s is not loaded yet", rplHandle.rplname, err, rplHandle.handle);
return 0;
}
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rpl_handle = rplHandle.handle;
break;
}
}
if (!rpl_handle) {
DEBUG_FUNCTION_LINE_ERR("Failed to find the RPL handle for %s", functionName);
return 0;
}
OSDynLoad_FindExport(rpl_handle, 0, functionName, reinterpret_cast<void **>(&real_addr));
if (!real_addr) {
DEBUG_FUNCTION_LINE_VERBOSE("OSDynLoad_FindExport failed for %s", functionName);
return 0;
}
uint32_t realAddrData = *((volatile uint32_t *) real_addr);
if ((realAddrData & 0xFC000003) == 0x48000000) {
auto address_diff = (uint32_t) (realAddrData & 0x01FFFFFC);
if ((realAddrData & 0x02000000) == 0x02000000) {
address_diff = 0xFE000000 + address_diff;
}
real_addr += (int32_t) address_diff;
}
return real_addr;
}
void FunctionAddressProvider::resetHandles() {
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for (auto &rplHandle : rpl_handles) {
if (rplHandle.handle != nullptr) {
DEBUG_FUNCTION_LINE_VERBOSE("Resetting handle for rpl: %s", rplHandle.rplname);
}
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rplHandle.handle = nullptr;
}
}