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Check the meta information first when loading a module

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This commit is contained in:
Maschell 2023-01-06 18:06:11 +01:00
parent f694372910
commit 350c4cc39f
1 changed files with 52 additions and 52 deletions
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104
wumsloader/src/module/ModuleDataFactory.cpp
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@ -54,6 +54,58 @@ std::optional<std::shared_ptr<ModuleData>> ModuleDataFactory::load(const std::st
} }
uint32_t sec_num = reader.sections.size(); uint32_t sec_num = reader.sections.size();
bool checkedVersion = false;
for (uint32_t i = 0; i < sec_num; ++i) {
auto *psec = reader.sections[i];
if (psec->get_name() == ".wums.meta") {
char *curEntry = (char *) psec->get_data();
while ((uint32_t) curEntry < (uint32_t) psec->get_data() + psec->get_size()) {
if (*curEntry == '\0') {
curEntry++;
continue;
}
auto firstFound = std::string(curEntry).find_first_of('=');
if (firstFound != std::string::npos) {
curEntry[firstFound] = '\0';
std::string key(curEntry);
std::string value(curEntry + firstFound + 1);
if (key == "export_name") {
moduleData->setExportName(value);
} else if (key == "skipInitFini") {
if (value == "true") {
DEBUG_FUNCTION_LINE("skipInitFini = %s", value.c_str());
moduleData->setSkipInitFini(true);
} else {
moduleData->setSkipInitFini(false);
}
} else if (key == "initBeforeRelocationDoneHook") {
if (value == "true") {
DEBUG_FUNCTION_LINE("initBeforeRelocationDoneHook = %s", value.c_str());
moduleData->setInitBeforeRelocationDoneHook(true);
} else {
moduleData->setInitBeforeRelocationDoneHook(false);
}
} else if (key == "wums" || key == "wum") {
checkedVersion = true;
if (value != "0.3.1" && value != "0.3.2") {
DEBUG_FUNCTION_LINE_WARN("Ignoring module - Unsupported WUMS version: %s.", value.c_str());
return std::nullopt;
}
}
}
curEntry += strlen(curEntry) + 1;
}
break;
}
}
if (!checkedVersion) {
DEBUG_FUNCTION_LINE_ERR("Failed to check version. Ignoring module");
return {};
}
auto destinations = make_unique_nothrow<uint8_t *[]>(sec_num); auto destinations = make_unique_nothrow<uint8_t *[]>(sec_num);
if (!destinations) { if (!destinations) {
DEBUG_FUNCTION_LINE_ERR("Failed alloc memory for destinations array"); DEBUG_FUNCTION_LINE_ERR("Failed alloc memory for destinations array");
@ -229,58 +281,6 @@ std::optional<std::shared_ptr<ModuleData>> ModuleDataFactory::load(const std::st
} }
} }
bool checkedVersion = false;
secInfo = moduleData->getSectionInfo(".wums.meta");
if (secInfo && secInfo.value()->getSize() > 0) {
auto *entries = (wums_entry_t *) secInfo.value()->getAddress();
if (entries != nullptr) {
char *curEntry = (char *) secInfo.value()->getAddress();
while ((uint32_t) curEntry < (uint32_t) secInfo.value()->getAddress() + secInfo.value()->getSize()) {
if (*curEntry == '\0') {
curEntry++;
continue;
}
auto firstFound = std::string(curEntry).find_first_of('=');
if (firstFound != std::string::npos) {
curEntry[firstFound] = '\0';
std::string key(curEntry);
std::string value(curEntry + firstFound + 1);
if (key == "export_name") {
moduleData->setExportName(value);
} else if (key == "skipInitFini") {
if (value == "true") {
DEBUG_FUNCTION_LINE("skipInitFini = %s", value.c_str());
moduleData->setSkipInitFini(true);
} else {
moduleData->setSkipInitFini(false);
}
} else if (key == "initBeforeRelocationDoneHook") {
if (value == "true") {
DEBUG_FUNCTION_LINE("initBeforeRelocationDoneHook = %s", value.c_str());
moduleData->setInitBeforeRelocationDoneHook(true);
} else {
moduleData->setInitBeforeRelocationDoneHook(false);
}
} else if (key == "wums" || key == "wum") {
checkedVersion = true;
if (value != "0.3.1" && values != "0.3.2") {
DEBUG_FUNCTION_LINE_WARN("Ignoring module - Unsupported WUMS version: %s.", value.c_str());
return std::nullopt;
}
}
}
curEntry += strlen(curEntry) + 1;
}
}
}
if (!checkedVersion) {
DEBUG_FUNCTION_LINE_ERR("Failed to check version. Ignoring module.");
return {};
}
// Get the symbol for functions. // Get the symbol for functions.
Elf_Half n = reader.sections.size(); Elf_Half n = reader.sections.size();
for (Elf_Half i = 0; i < n; ++i) { for (Elf_Half i = 0; i < n; ++i) {