mirror of
https://github.com/wiiu-env/WiiUPluginLoaderBackend.git
synced 2024-11-30 00:24:14 +01:00
421 lines
19 KiB
C++
421 lines
19 KiB
C++
/****************************************************************************
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* Copyright (C) 2018-2020 Maschell
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "PluginLinkInformationFactory.h"
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#include "../utils/ElfUtils.h"
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#include "utils/HeapMemoryFixedSize.h"
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#include "utils/wiiu_zlib.hpp"
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#include <coreinit/cache.h>
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#include <map>
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#include <memory>
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#include <string>
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#include <wups/function_patching.h>
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using namespace ELFIO;
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std::optional<PluginLinkInformation>
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PluginLinkInformationFactory::load(const PluginData &pluginData, std::vector<relocation_trampoline_entry_t> &trampolineData, uint8_t trampolineId) {
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auto buffer = pluginData.getBuffer();
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if (buffer.empty()) {
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DEBUG_FUNCTION_LINE_ERR("Buffer was empty");
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return std::nullopt;
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}
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elfio reader(new wiiu_zlib);
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if (!reader.load(reinterpret_cast<const char *>(buffer.data()), buffer.size())) {
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DEBUG_FUNCTION_LINE_ERR("Can't process PluginData in elfio");
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return std::nullopt;
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}
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PluginLinkInformation pluginInfo;
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uint32_t sec_num = reader.sections.size();
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auto destinationsData = make_unique_nothrow<uint8_t *[]>(sec_num);
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if (!destinationsData) {
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DEBUG_FUNCTION_LINE_ERR("Failed alloc memory for destinations array");
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return std::nullopt;
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}
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std::span<uint8_t *> destinations(destinationsData.get(), sec_num);
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uint32_t totalSize = 0;
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uint32_t text_size = 0;
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uint32_t data_size = 0;
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for (uint32_t i = 0; i < sec_num; ++i) {
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section *psec = reader.sections[i];
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if (psec->get_type() == 0x80000002) {
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continue;
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}
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if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
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uint32_t sectionSize = psec->get_size();
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auto address = (uint32_t) psec->get_address();
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if ((address >= 0x02000000) && address < 0x10000000) {
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text_size += sectionSize + psec->get_addr_align();
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} else if ((address >= 0x10000000) && address < 0xC0000000) {
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data_size += sectionSize + psec->get_addr_align();
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}
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if (psec->get_name().starts_with(".wups.")) {
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data_size += sectionSize + psec->get_addr_align();
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}
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}
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}
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HeapMemoryFixedSize text_data(text_size);
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if (!text_data) {
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DEBUG_FUNCTION_LINE_ERR("Failed to alloc memory for the .text section (%d bytes)", text_size);
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return std::nullopt;
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}
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HeapMemoryFixedSize data_data(data_size);
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if (!data_data) {
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DEBUG_FUNCTION_LINE_ERR("Failed to alloc memory for the .data section (%d bytes)", data_size);
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return std::nullopt;
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}
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for (uint32_t i = 0; i < sec_num; ++i) {
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section *psec = reader.sections[i];
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if (psec->get_type() == 0x80000002 || psec->get_name() == ".wut_load_bounds") {
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continue;
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}
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if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
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uint32_t sectionSize = psec->get_size();
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auto address = (uint32_t) psec->get_address();
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uint32_t destination = address;
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if ((address >= 0x02000000) && address < 0x10000000) {
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destination += (uint32_t) text_data.data();
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destination -= 0x02000000;
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destinations[psec->get_index()] = (uint8_t *) text_data.data();
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if (destination + sectionSize > (uint32_t) text_data.data() + text_size) {
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DEBUG_FUNCTION_LINE_ERR("Tried to overflow .text buffer. %08X > %08X", destination + sectionSize, (uint32_t) text_data.data() + text_data.size());
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return std::nullopt;
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} else if (destination < (uint32_t) text_data.data()) {
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DEBUG_FUNCTION_LINE_ERR("Tried to underflow .text buffer. %08X < %08X", destination, (uint32_t) text_data.data());
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return std::nullopt;
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}
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} else if ((address >= 0x10000000) && address < 0xC0000000) {
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destination += (uint32_t) data_data.data();
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destination -= 0x10000000;
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destinations[psec->get_index()] = (uint8_t *) data_data.data();
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if (destination + sectionSize > (uint32_t) data_data.data() + data_data.size()) {
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DEBUG_FUNCTION_LINE_ERR("Tried to overflow .data buffer. %08X > %08X", destination + sectionSize, (uint32_t) data_data.data() + data_data.size());
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return std::nullopt;
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} else if (destination < (uint32_t) data_data.data()) {
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DEBUG_FUNCTION_LINE_ERR("Tried to underflow .data buffer. %08X < %08X", destination, (uint32_t) text_data.data());
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return std::nullopt;
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}
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} else if (address >= 0xC0000000) {
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DEBUG_FUNCTION_LINE_ERR("Loading section from 0xC0000000 is NOT supported");
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return std::nullopt;
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} else {
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DEBUG_FUNCTION_LINE_ERR("Unhandled case");
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return std::nullopt;
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}
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const char *p = psec->get_data();
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uint32_t address_align = psec->get_addr_align();
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if ((destination & (address_align - 1)) != 0) {
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DEBUG_FUNCTION_LINE_WARN("Address not aligned: %08X %08X", destination, address_align);
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return std::nullopt;
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}
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if (psec->get_type() == SHT_NOBITS) {
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DEBUG_FUNCTION_LINE_VERBOSE("memset section %s %08X to 0 (%d bytes)", psec->get_name().c_str(), destination, sectionSize);
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memset((void *) destination, 0, sectionSize);
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} else if (psec->get_type() == SHT_PROGBITS) {
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DEBUG_FUNCTION_LINE_VERBOSE("Copy section %s %08X -> %08X (%d bytes)", psec->get_name().c_str(), p, destination, sectionSize);
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memcpy((void *) destination, p, sectionSize);
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}
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pluginInfo.addSectionInfo(SectionInfo(psec->get_name(), destination, sectionSize));
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DEBUG_FUNCTION_LINE_VERBOSE("Saved %s section info. Location: %08X size: %08X", psec->get_name().c_str(), destination, sectionSize);
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totalSize += sectionSize;
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DCFlushRange((void *) destination, sectionSize);
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ICInvalidateRange((void *) destination, sectionSize);
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}
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}
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for (uint32_t i = 0; i < sec_num; ++i) {
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section *psec = reader.sections[i];
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if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
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DEBUG_FUNCTION_LINE_VERBOSE("Linking (%d)... %s at %08X", i, psec->get_name().c_str(), destinations[psec->get_index()]);
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if (!linkSection(reader, psec->get_index(), (uint32_t) destinations[psec->get_index()], (uint32_t) text_data.data(), (uint32_t) data_data.data(), trampolineData,
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trampolineId)) {
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DEBUG_FUNCTION_LINE_ERR("linkSection failed");
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return std::nullopt;
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}
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}
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}
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if (!PluginLinkInformationFactory::addImportRelocationData(pluginInfo, reader, destinations)) {
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DEBUG_FUNCTION_LINE_ERR("addImportRelocationData failed");
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return std::nullopt;
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}
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DCFlushRange((void *) text_data.data(), text_data.size());
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ICInvalidateRange((void *) text_data.data(), text_data.size());
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DCFlushRange((void *) data_data.data(), data_data.size());
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ICInvalidateRange((void *) data_data.data(), data_data.size());
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pluginInfo.setTrampolineId(trampolineId);
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auto secInfo = pluginInfo.getSectionInfo(".wups.hooks");
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if (secInfo && secInfo->getSize() > 0) {
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size_t entries_count = secInfo->getSize() / sizeof(wups_loader_hook_t);
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auto *entries = (wups_loader_hook_t *) secInfo->getAddress();
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if (entries != nullptr) {
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for (size_t j = 0; j < entries_count; j++) {
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wups_loader_hook_t *hook = &entries[j];
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DEBUG_FUNCTION_LINE_VERBOSE("Saving hook of plugin Type: %08X, target: %08X", hook->type, (void *) hook->target);
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pluginInfo.addHookData(HookData((void *) hook->target, hook->type));
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}
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}
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}
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secInfo = pluginInfo.getSectionInfo(".wups.load");
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if (secInfo && secInfo->getSize() > 0) {
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size_t entries_count = secInfo->getSize() / sizeof(wups_loader_entry_t);
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auto *entries = (wups_loader_entry_t *) secInfo->getAddress();
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if (entries != nullptr) {
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for (size_t j = 0; j < entries_count; j++) {
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wups_loader_entry_t *cur_function = &entries[j];
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DEBUG_FUNCTION_LINE_VERBOSE("Saving function \"%s\" of plugin . PA:%08X VA:%08X Library: %08X, target: %08X, call_addr: %08X",
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cur_function->_function.name /*,mPluginData->getPluginInformation()->getName().c_str()*/,
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cur_function->_function.physical_address, cur_function->_function.virtual_address, cur_function->_function.library, cur_function->_function.target,
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(void *) cur_function->_function.call_addr);
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pluginInfo.addFunctionData(FunctionData((void *) cur_function->_function.physical_address,
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(void *) cur_function->_function.virtual_address,
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cur_function->_function.name,
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(function_replacement_library_type_t) cur_function->_function.library,
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(void *) cur_function->_function.target,
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(void *) cur_function->_function.call_addr,
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(FunctionPatcherTargetProcess) cur_function->_function.targetProcess));
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}
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}
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}
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// Get the symbol for functions.
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Elf_Half n = reader.sections.size();
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for (Elf_Half i = 0; i < n; ++i) {
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section *sec = reader.sections[i];
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if (SHT_SYMTAB == sec->get_type()) {
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symbol_section_accessor symbols(reader, sec);
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auto sym_no = (uint32_t) symbols.get_symbols_num();
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if (sym_no > 0) {
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for (Elf_Half j = 0; j < sym_no; ++j) {
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std::string name;
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Elf64_Addr value = 0;
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Elf_Xword size = 0;
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unsigned char bind = 0;
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unsigned char type = 0;
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Elf_Half section = 0;
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unsigned char other = 0;
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if (symbols.get_symbol(j, name, value, size, bind, type, section, other)) {
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if (type == STT_FUNC) { // We only care about functions.
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auto sectionVal = reader.sections[section];
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auto offsetVal = value - sectionVal->get_address();
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auto sectionInfo = pluginInfo.getSectionInfo(sectionVal->get_name());
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if (!sectionInfo) {
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continue;
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}
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auto finalAddress = offsetVal + sectionInfo->getAddress();
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pluginInfo.addFunctionSymbolData(FunctionSymbolData(name, (void *) finalAddress, (uint32_t) size));
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}
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}
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}
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break;
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}
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}
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}
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if (totalSize > text_size + data_size) {
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DEBUG_FUNCTION_LINE_ERR("We didn't allocate enough memory!!");
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return std::nullopt;
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}
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// Save the addresses for the allocated memory. This way we can free it again :)
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pluginInfo.mAllocatedDataMemoryAddress = std::move(data_data);
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pluginInfo.mAllocatedTextMemoryAddress = std::move(text_data);
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return pluginInfo;
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}
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bool PluginLinkInformationFactory::addImportRelocationData(PluginLinkInformation &pluginInfo, const elfio &reader, std::span<uint8_t *> destinations) {
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std::map<uint32_t, std::shared_ptr<ImportRPLInformation>> infoMap;
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uint32_t sec_num = reader.sections.size();
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for (uint32_t i = 0; i < sec_num; ++i) {
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auto *psec = reader.sections[i];
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if (psec->get_type() == 0x80000002) {
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auto info = make_shared_nothrow<ImportRPLInformation>(psec->get_name());
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if (!info) {
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return false;
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}
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infoMap[i] = std::move(info);
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}
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}
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for (uint32_t i = 0; i < sec_num; ++i) {
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section *psec = reader.sections[i];
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if (psec->get_type() == SHT_RELA || psec->get_type() == SHT_REL) {
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DEBUG_FUNCTION_LINE_VERBOSE("Found relocation section %s", psec->get_name().c_str());
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relocation_section_accessor rel(reader, psec);
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for (uint32_t j = 0; j < (uint32_t) rel.get_entries_num(); ++j) {
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Elf_Word symbol = 0;
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Elf64_Addr offset;
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Elf_Word type;
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Elf_Sxword addend;
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std::string sym_name;
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Elf64_Addr sym_value;
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if (!rel.get_entry(j, offset, symbol, type, addend)) {
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DEBUG_FUNCTION_LINE_ERR("Failed to get relocation");
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return false;
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}
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symbol_section_accessor symbols(reader, reader.sections[(Elf_Half) psec->get_link()]);
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// Find the symbol
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Elf_Xword size;
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unsigned char bind;
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unsigned char symbolType;
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Elf_Half sym_section_index;
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unsigned char other;
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if (!symbols.get_symbol(symbol, sym_name, sym_value, size,
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bind, symbolType, sym_section_index, other)) {
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DEBUG_FUNCTION_LINE_ERR("Failed to get symbol");
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return false;
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}
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auto adjusted_sym_value = (uint32_t) sym_value;
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if (adjusted_sym_value < 0xC0000000) {
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continue;
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}
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uint32_t section_index = psec->get_info();
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if (!infoMap.contains(sym_section_index)) {
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DEBUG_FUNCTION_LINE_ERR("Relocation is referencing a unknown section. %d destination: %08X sym_name %s", section_index, destinations[section_index], sym_name.c_str());
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return false;
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}
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pluginInfo.addRelocationData(RelocationData(type,
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offset - 0x02000000,
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addend,
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(void *) (destinations[section_index]),
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sym_name,
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infoMap[sym_section_index]));
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}
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}
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}
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return true;
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}
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bool PluginLinkInformationFactory::linkSection(const elfio &reader, uint32_t section_index, uint32_t destination, uint32_t base_text, uint32_t base_data,
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std::vector<relocation_trampoline_entry_t> &trampolineData, uint8_t trampolineId) {
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uint32_t sec_num = reader.sections.size();
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for (uint32_t i = 0; i < sec_num; ++i) {
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section *psec = reader.sections[i];
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if (psec->get_info() == section_index) {
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DEBUG_FUNCTION_LINE_VERBOSE("Found relocation section %s", psec->get_name().c_str());
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relocation_section_accessor rel(reader, psec);
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for (uint32_t j = 0; j < (uint32_t) rel.get_entries_num(); ++j) {
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Elf_Word symbol = 0;
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Elf64_Addr offset;
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Elf_Word type;
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Elf_Sxword addend;
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std::string sym_name;
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Elf64_Addr sym_value;
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if (!rel.get_entry(j, offset, symbol, type, addend)) {
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DEBUG_FUNCTION_LINE_ERR("Failed to get relocation");
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return false;
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}
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symbol_section_accessor symbols(reader, reader.sections[(Elf_Half) psec->get_link()]);
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// Find the symbol
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Elf_Xword size;
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unsigned char bind;
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unsigned char symbolType;
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Elf_Half sym_section_index;
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unsigned char other;
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if (!symbols.get_symbol(symbol, sym_name, sym_value, size,
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bind, symbolType, sym_section_index, other)) {
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DEBUG_FUNCTION_LINE_ERR("Failed to get symbol");
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return false;
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}
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auto adjusted_sym_value = (uint32_t) sym_value;
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if ((adjusted_sym_value >= 0x02000000) && adjusted_sym_value < 0x10000000) {
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adjusted_sym_value -= 0x02000000;
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adjusted_sym_value += base_text;
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} else if ((adjusted_sym_value >= 0x10000000) && adjusted_sym_value < 0xC0000000) {
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adjusted_sym_value -= 0x10000000;
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adjusted_sym_value += base_data;
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} else if (adjusted_sym_value >= 0xC0000000) {
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//DEBUG_FUNCTION_LINE("Skip imports");
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// Skip imports
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continue;
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} else if (adjusted_sym_value == 0x0) {
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//
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} else {
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DEBUG_FUNCTION_LINE_ERR("Unhandled case %08X", adjusted_sym_value);
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return false;
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}
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auto adjusted_offset = (uint32_t) offset;
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if ((offset >= 0x02000000) && offset < 0x10000000) {
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adjusted_offset -= 0x02000000;
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} else if ((adjusted_offset >= 0x10000000) && adjusted_offset < 0xC0000000) {
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adjusted_offset -= 0x10000000;
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} else if (adjusted_offset >= 0xC0000000) {
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adjusted_offset -= 0xC0000000;
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}
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if (sym_section_index == SHN_ABS) {
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//
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} else if (sym_section_index > SHN_LORESERVE) {
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DEBUG_FUNCTION_LINE_ERR("NOT IMPLEMENTED: %04X", sym_section_index);
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return false;
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}
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// DEBUG_FUNCTION_LINE_VERBOSE("sym_value %08X adjusted_sym_value %08X offset %08X adjusted_offset %08X", (uint32_t) sym_value, adjusted_sym_value, (uint32_t) offset, adjusted_offset);
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if (!ElfUtils::elfLinkOne(type, adjusted_offset, addend, destination, adjusted_sym_value, trampolineData, RELOC_TYPE_FIXED, trampolineId)) {
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DEBUG_FUNCTION_LINE_ERR("Link failed");
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return false;
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}
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}
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DEBUG_FUNCTION_LINE_VERBOSE("done");
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return true;
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}
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}
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return true;
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}
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