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CustomRPXLoader
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Improve RPL loading

This commit is contained in:
Maschell 2023-06-16 16:59:23 +02:00
parent cd73d30f7f
commit d950ea9432
1 changed files with 19 additions and 3 deletions
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22
src/main.cpp
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@ -166,17 +166,33 @@ uint32_t do_start(int argc, char **argv) {
}
bool doRelocation(const std::vector<RelocationData> &relocData, relocation_trampolin_entry_t *tramp_data, uint32_t tramp_length) {
std::map<std::string, OSDynLoad_Module> usedRPls;
for (auto const &curReloc : relocData) {
const RelocationData &cur = curReloc;
std::string functionName = cur.getName();
std::string rplName = cur.getImportRPLInformation().getName();
int32_t isData = cur.getImportRPLInformation().isData();
OSDynLoad_Module rplHandle = nullptr;
OSDynLoad_Acquire(rplName.c_str(), &rplHandle);
if (!usedRPls.contains(rplName)) {
DEBUG_FUNCTION_LINE_VERBOSE("Acquire %s", rplName.c_str());
// Always acquire to increase refcount and make sure it won't get unloaded while we're using it.
OSDynLoad_Error err = OSDynLoad_Acquire(rplName.c_str(), &rplHandle);
if (err != OS_DYNLOAD_OK) {
DEBUG_FUNCTION_LINE_ERR("Failed to acquire %s", rplName.c_str());
return false;
}
// Keep track RPLs we are using.
// They will be released on exit (See: AromaBaseModule)
usedRPls[rplName] = rplHandle;
} else {
DEBUG_FUNCTION_LINE_VERBOSE("Use from usedRPLs cache! %s", rplName.c_str());
}
rplHandle = usedRPls[rplName];
uint32_t functionAddress = 0;
OSDynLoad_FindExport(rplHandle, (OSDynLoad_ExportType) isData, functionName.c_str(), (void **) &functionAddress);
if (functionAddress == 0) {
if ((OSDynLoad_FindExport(rplHandle, (OSDynLoad_ExportType) isData, functionName.c_str(), (void **) &functionAddress) != OS_DYNLOAD_OK) || functionAddress == 0) {
DEBUG_FUNCTION_LINE_ERR("Failed to find export \"\"", functionName.c_str());
return false;
}
if (!ElfUtils::elfLinkOne(cur.getType(), cur.getOffset(), cur.getAddend(), (uint32_t) cur.getDestination(), functionAddress, tramp_data, tramp_length, RELOC_TYPE_IMPORT)) {