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Call module init hooks

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This commit is contained in:
Maschell 2020-05-29 19:27:30 +02:00
parent 28926f6a9b
commit a3310579b8
1 changed files with 77 additions and 3 deletions
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80
relocator/src/entry.cpp
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@ -7,6 +7,7 @@
#include <nsysnet/socket.h>
#include <coreinit/memorymap.h>
#include <map>
#include <algorithm>
#include "../../source/common/dynamic_linking_defines.h"
#include "../../source/common/module_defines.h"
#include "../../source/module/RelocationData.h"
@ -23,6 +24,9 @@
#define gModuleData ((module_information_t *) (0x00880000))
uint8_t gFunctionsPatched __attribute__((section(".data"))) = 0;
uint8_t gInitCalled __attribute__((section(".data"))) = 0;
void CallInitHook(const std::vector<ModuleData> &loadedModules);
extern "C" void doStart(int argc, char **argv);
// We need to wrap it to make sure the main function is called AFTER our code.
@ -68,8 +72,7 @@ bool doRelocation(std::vector<RelocationData> &relocData, relocation_trampolin_e
return true;
}
bool ResolveRelocations() {
std::vector<ModuleData> loadedModules = ModuleDataPersistence::loadModuleData(gModuleData);
bool ResolveRelocations(const std::vector<ModuleData> &loadedModules) {
bool wasSuccessful = true;
uint32_t count = 0;
for (auto const &curModule : loadedModules) {
@ -100,12 +103,83 @@ extern "C" void doStart(int argc, char **argv) {
kernelInitialize();
PatchInvidualMethodHooks(method_hooks_hooks_static, method_hooks_size_hooks_static, method_calls_hooks_static);
}
DEBUG_FUNCTION_LINE("Loading module data\n");
std::vector<ModuleData> loadedModules = ModuleDataPersistence::loadModuleData(gModuleData);
DEBUG_FUNCTION_LINE("Resolve relocations\n");
DEBUG_FUNCTION_LINE("Number of modules %d\n", gModuleData->number_used_modules);
ResolveRelocations();
ResolveRelocations(loadedModules);
if (!gInitCalled) {
gInitCalled = 1;
CallInitHook(loadedModules);
}
for (int i = 0; i < gModuleData->number_used_modules; i++) {
DEBUG_FUNCTION_LINE("About to call %08X\n", gModuleData->module_data[i].entrypoint);
int ret = ((int (*)(int, char **)) (gModuleData->module_data[i].entrypoint))(argc, argv);
DEBUG_FUNCTION_LINE("return code was %d\n", ret);
}
}
void CallInitHook(const std::vector<ModuleData> &loadedModules) {
std::vector<std::string> loadedModulesExportNames;
std::vector<uint32_t> loadedModulesEntrypoints;
while (true) {
bool canBreak = true;
bool weDidSomething = false;
for (auto const &curModule : loadedModules) {
if (std::find(loadedModulesEntrypoints.begin(), loadedModulesEntrypoints.end(), curModule.getEntrypoint()) != loadedModulesEntrypoints.end()) {
DEBUG_FUNCTION_LINE("%s [%08X] is already loaded\n", curModule.getExportName().c_str(), curModule.getEntrypoint());
continue;
}
canBreak = false;
DEBUG_FUNCTION_LINE("Missing %s\n", curModule.getExportName().c_str());
std::vector<std::string> importsFromOtherModules;
for (auto curReloc: curModule.getRelocationDataList()) {
std::string curRPL = curReloc.getImportRPLInformation().getName();
if (curRPL.rfind("homebrew", 0) == 0) {
if (std::find(importsFromOtherModules.begin(), importsFromOtherModules.end(), curRPL) != importsFromOtherModules.end()) {
// is already in vector
} else {
DEBUG_FUNCTION_LINE("%s is importing from %s\n", curModule.getExportName().c_str(), curRPL.c_str());
importsFromOtherModules.push_back(curRPL);
}
}
}
bool canLoad = true;
for (auto &curImportRPL : importsFromOtherModules) {
if (std::find(loadedModulesExportNames.begin(), loadedModulesExportNames.end(), curImportRPL) != loadedModulesExportNames.end()) {
} else {
DEBUG_FUNCTION_LINE("We can't load the module, because %s is not loaded yet\n", curImportRPL.c_str());
canLoad = false;
break;
}
}
if (canLoad) {
weDidSomething = true;
DEBUG_FUNCTION_LINE("We can load %s\n", curModule.getExportName().c_str());
for (auto &curHook : curModule.getHookDataList()) {
if (curHook.getType() == WUMS_HOOK_INIT) {
uint32_t func_ptr = (uint32_t) curHook.getTarget();
if (func_ptr == NULL) {
DEBUG_FUNCTION_LINE("Hook ptr was NULL\n");
} else {
DEBUG_FUNCTION_LINE("Calling init of %s\n", curModule.getExportName().c_str());
((void (*)(void)) ((uint32_t *) func_ptr))();
}
}
}
loadedModulesExportNames.push_back(curModule.getExportName());
loadedModulesEntrypoints.push_back(curModule.getEntrypoint());
}
}
if (canBreak) {
break;
} else if (!weDidSomething) {
OSFatal_printf("Failed to resolve dependencies.");
}
}
}