mirror of
https://github.com/wiiu-env/EnvironmentLoader.git
synced 2024-11-01 04:55:05 +01:00
325 lines
14 KiB
C++
325 lines
14 KiB
C++
/****************************************************************************
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* Copyright (C) 2018-2021 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 "ModuleDataFactory.h"
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#include "../utils/FileUtils.h"
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#include "ElfUtils.h"
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#include "utils/OnLeavingScope.h"
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#include "utils/utils.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 <string>
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#include <vector>
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std::optional<std::unique_ptr<ModuleData>>
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ModuleDataFactory::load(const std::string &path, uint32_t destination_address_end, uint32_t maximum_size, relocation_trampoline_entry_t *trampoline_data, uint32_t trampoline_data_length) {
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ELFIO::elfio reader(new wiiu_zlib);
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auto moduleData = make_unique_nothrow<ModuleData>();
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if (!moduleData) {
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DEBUG_FUNCTION_LINE_ERR("Failed to allocate ModuleData");
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return {};
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}
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uint8_t *buffer = nullptr;
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uint32_t fsize = 0;
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if (LoadFileToMem(path.c_str(), &buffer, &fsize) < 0) {
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DEBUG_FUNCTION_LINE_ERR("Failed to load file");
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return {};
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}
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// Load ELF data
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if (!reader.load(reinterpret_cast<char *>(buffer), fsize)) {
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DEBUG_FUNCTION_LINE_ERR("Can't find or process %s", path.c_str());
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free(buffer);
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return {};
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}
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auto cleanupBuffer = onLeavingScope([buffer]() { free(buffer); });
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uint32_t sec_num = reader.sections.size();
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auto destinations = make_unique_nothrow<uint8_t *[]>(sec_num);
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if (!destinations) {
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DEBUG_FUNCTION_LINE_ERR("Failed alloc memory for destinations array");
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return {};
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}
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uint32_t sizeOfModule = 0;
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for (uint32_t i = 0; i < sec_num; ++i) {
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ELFIO::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() == ELFIO::SHT_PROGBITS || psec->get_type() == ELFIO::SHT_NOBITS) && (psec->get_flags() & ELFIO::SHF_ALLOC)) {
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sizeOfModule += psec->get_size() + 1;
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}
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}
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if (sizeOfModule > maximum_size) {
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DEBUG_FUNCTION_LINE_ERR("Module is too big.");
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return {};
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}
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uint32_t baseOffset = (destination_address_end - sizeOfModule) & 0xFFFFFF00;
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uint32_t startAddress = baseOffset;
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uint32_t offset_text = baseOffset;
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uint32_t offset_data = offset_text;
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uint32_t entrypoint = offset_text + (uint32_t) reader.get_entry() - 0x02000000;
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uint32_t totalSize = 0;
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uint32_t endAddress = 0;
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for (uint32_t i = 0; i < sec_num; ++i) {
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ELFIO::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() == ELFIO::SHT_PROGBITS || psec->get_type() == ELFIO::SHT_NOBITS) && (psec->get_flags() & ELFIO::SHF_ALLOC)) {
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uint32_t sectionSize = psec->get_size();
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totalSize += sectionSize;
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if (totalSize > maximum_size) {
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DEBUG_FUNCTION_LINE_ERR("Couldn't load setup module because it's too big.");
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return {};
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}
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auto address = (uint32_t) psec->get_address();
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destinations[psec->get_index()] = (uint8_t *) baseOffset;
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uint32_t destination = baseOffset + address;
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if ((address >= 0x02000000) && address < 0x10000000) {
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destination -= 0x02000000;
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destinations[psec->get_index()] -= 0x02000000;
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baseOffset += sectionSize;
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offset_data += sectionSize;
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} else if ((address >= 0x10000000) && address < 0xC0000000) {
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destination -= 0x10000000;
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destinations[psec->get_index()] -= 0x10000000;
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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 = reader.sections[i]->get_data();
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if (destination + sectionSize > (uint32_t) destination_address_end) {
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DEBUG_FUNCTION_LINE_ERR("Tried to overflow buffer. %08X > %08X", destination + sectionSize, destination_address_end);
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OSFatal("EnvironmentLoader: Tried to overflow buffer");
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}
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if (psec->get_type() == ELFIO::SHT_NOBITS) {
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DEBUG_FUNCTION_LINE("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() == ELFIO::SHT_PROGBITS) {
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DEBUG_FUNCTION_LINE("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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//nextAddress = ROUNDUP(destination + sectionSize, 0x100);
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if (psec->get_name() == ".bss" || psec->get_name() == ".sbss") {
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DEBUG_FUNCTION_LINE("memset %s section. Location: %08X size: %08X", psec->get_name().c_str(), destination, sectionSize);
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memset(reinterpret_cast<void *>(destination), 0, sectionSize);
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}
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if (endAddress < destination + sectionSize) {
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endAddress = destination + sectionSize;
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}
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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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ELFIO::section *psec = reader.sections[i];
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if ((psec->get_type() == ELFIO::SHT_PROGBITS || psec->get_type() == ELFIO::SHT_NOBITS) && (psec->get_flags() & ELFIO::SHF_ALLOC)) {
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DEBUG_FUNCTION_LINE("Linking (%d)... %s", i, psec->get_name().c_str());
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if (!linkSection(reader, psec->get_index(), (uint32_t) destinations[psec->get_index()], offset_text, offset_data, trampoline_data, trampoline_data_length)) {
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DEBUG_FUNCTION_LINE_ERR("elfLink failed");
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return std::nullopt;
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}
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}
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}
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getImportRelocationData(moduleData, reader, destinations.get());
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DCFlushRange((void *) baseOffset, totalSize);
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ICInvalidateRange((void *) baseOffset, totalSize);
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moduleData->setStartAddress(startAddress);
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moduleData->setEndAddress(endAddress);
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moduleData->setEntrypoint(entrypoint);
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DEBUG_FUNCTION_LINE("Saved entrypoint as %08X", entrypoint);
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return moduleData;
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}
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bool ModuleDataFactory::getImportRelocationData(std::unique_ptr<ModuleData> &moduleData, ELFIO::elfio &reader, 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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DEBUG_FUNCTION_LINE_ERR("Failed too allocate ImportRPLInformation");
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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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ELFIO::section *psec = reader.sections[i];
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if (psec->get_type() == ELFIO::SHT_RELA || psec->get_type() == ELFIO::SHT_REL) {
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ELFIO::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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ELFIO::Elf_Word symbol = 0;
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ELFIO::Elf64_Addr offset;
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ELFIO::Elf_Word type;
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ELFIO::Elf_Sxword addend;
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std::string sym_name;
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ELFIO::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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ELFIO::symbol_section_accessor symbols(reader, reader.sections[(ELFIO::Elf_Half) psec->get_link()]);
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// Find the symbol
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ELFIO::Elf_Xword size;
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unsigned char bind;
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unsigned char symbolType;
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ELFIO::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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OSFatal("EnvironmentLoader: Relocation is referencing a unknown section.");
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}
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auto relocationData = make_unique_nothrow<RelocationData>(type,
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offset - 0x02000000,
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addend,
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(void *) (destinations[section_index] + 0x02000000),
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sym_name,
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infoMap[sym_section_index]);
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if (!relocationData) {
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DEBUG_FUNCTION_LINE_ERR("Failed to alloc relocation data");
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return false;
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}
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moduleData->addRelocationData(std::move(relocationData));
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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 ModuleDataFactory::linkSection(ELFIO::elfio &reader, uint32_t section_index, uint32_t destination, uint32_t base_text, uint32_t base_data, relocation_trampoline_entry_t *trampoline_data,
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uint32_t trampoline_data_length) {
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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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ELFIO::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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ELFIO::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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ELFIO::Elf_Word symbol = 0;
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ELFIO::Elf64_Addr offset;
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ELFIO::Elf_Word type;
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ELFIO::Elf_Sxword addend;
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std::string sym_name;
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ELFIO::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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ELFIO::symbol_section_accessor symbols(reader, reader.sections[(ELFIO::Elf_Half) psec->get_link()]);
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// Find the symbol
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ELFIO::Elf_Xword size;
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unsigned char bind;
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unsigned char symbolType;
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ELFIO::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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// 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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if (sym_section_index == ELFIO::SHN_ABS) {
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//
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} else if (sym_section_index > ELFIO::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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if (!ElfUtils::elfLinkOne(type, offset, addend, destination, adjusted_sym_value, trampoline_data, trampoline_data_length, RELOC_TYPE_FIXED)) {
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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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}
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}
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return true;
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}
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