mirror of
https://github.com/wiiu-env/CustomRPXLoader.git
synced 2024-11-16 15:29:14 +01:00
260 lines
11 KiB
C++
260 lines
11 KiB
C++
/****************************************************************************
|
|
* Copyright (C) 2018-2020 Maschell
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
****************************************************************************/
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
#include <map>
|
|
#include <coreinit/cache.h>
|
|
#include "ModuleDataFactory.h"
|
|
#include "elfio/elfio.hpp"
|
|
#include "../ElfUtils.h"
|
|
|
|
using namespace ELFIO;
|
|
|
|
std::optional<ModuleData> ModuleDataFactory::load(const std::string &path, uint32_t destination_address, uint32_t maximum_size, relocation_trampolin_entry_t *trampolin_data, uint32_t trampolin_data_length) {
|
|
elfio reader;
|
|
ModuleData moduleData;
|
|
|
|
// Load ELF data
|
|
if (!reader.load(path)) {
|
|
DEBUG_FUNCTION_LINE("Can't find or process %s", path.c_str());
|
|
return {};
|
|
}
|
|
|
|
uint32_t sec_num = reader.sections.size();
|
|
|
|
auto **destinations = (uint8_t **) malloc(sizeof(uint8_t *) * sec_num);
|
|
|
|
uint32_t sizeOfModule = 0;
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if (psec->get_type() == 0x80000002) {
|
|
continue;
|
|
}
|
|
|
|
if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
|
|
sizeOfModule += psec->get_size() + 1;
|
|
}
|
|
}
|
|
|
|
if (sizeOfModule > maximum_size) {
|
|
DEBUG_FUNCTION_LINE("Module is too big.");
|
|
return {};
|
|
}
|
|
|
|
uint32_t baseOffset = (destination_address - sizeOfModule) & 0xFFFFFF00;
|
|
|
|
uint32_t offset_text = baseOffset;
|
|
uint32_t offset_data = offset_text;
|
|
|
|
uint32_t entrypoint = offset_text + (uint32_t) reader.get_entry() - 0x02000000;
|
|
|
|
uint32_t totalSize = 0;
|
|
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if (psec->get_type() == 0x80000002) {
|
|
continue;
|
|
}
|
|
|
|
if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
|
|
uint32_t sectionSize = psec->get_size();
|
|
auto address = (uint32_t) psec->get_address();
|
|
|
|
destinations[psec->get_index()] = (uint8_t *) baseOffset;
|
|
|
|
uint32_t destination = baseOffset + address;
|
|
if ((address >= 0x02000000) && address < 0x10000000) {
|
|
destination -= 0x02000000;
|
|
destinations[psec->get_index()] -= 0x02000000;
|
|
baseOffset += sectionSize;
|
|
offset_data += sectionSize;
|
|
} else if ((address >= 0x10000000) && address < 0xC0000000) {
|
|
destination -= 0x10000000;
|
|
destinations[psec->get_index()] -= 0x10000000;
|
|
} else if (address >= 0xC0000000) {
|
|
destination -= 0xC0000000;
|
|
destinations[psec->get_index()] -= 0xC0000000;
|
|
} else {
|
|
DEBUG_FUNCTION_LINE("Unhandled case");
|
|
free(destinations);
|
|
return {};
|
|
}
|
|
|
|
const char *p = reader.sections[i]->get_data();
|
|
|
|
if (psec->get_type() == SHT_NOBITS) {
|
|
DEBUG_FUNCTION_LINE("memset section %s %08X [%08X] to 0 (%d bytes)", psec->get_name().c_str(), destination, destination + sectionSize, sectionSize);
|
|
memset((void *) destination, 0, sectionSize);
|
|
} else if (psec->get_type() == SHT_PROGBITS) {
|
|
DEBUG_FUNCTION_LINE("Copy section %s %08X -> %08X [%08X] (%d bytes)", psec->get_name().c_str(), p, destination, destination + sectionSize, sectionSize);
|
|
memcpy((void *) destination, p, sectionSize);
|
|
}
|
|
|
|
//nextAddress = ROUNDUP(destination + sectionSize,0x100);
|
|
if (psec->get_name() == ".bss") {
|
|
moduleData.setBSSLocation(destination, sectionSize);
|
|
DEBUG_FUNCTION_LINE("Saved %s section info. Location: %08X size: %08X", psec->get_name().c_str(), destination, sectionSize);
|
|
} else if (psec->get_name() == ".sbss") {
|
|
moduleData.setSBSSLocation(destination, sectionSize);
|
|
DEBUG_FUNCTION_LINE("Saved %s section info. Location: %08X size: %08X", psec->get_name().c_str(), destination, sectionSize);
|
|
}
|
|
totalSize += sectionSize;
|
|
|
|
DCFlushRange((void *) destination, sectionSize);
|
|
ICInvalidateRange((void *) destination, sectionSize);
|
|
}
|
|
}
|
|
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
|
|
DEBUG_FUNCTION_LINE("Linking (%d)... %s", i, psec->get_name().c_str());
|
|
if (!linkSection(reader, psec->get_index(), (uint32_t) destinations[psec->get_index()], offset_text, offset_data, trampolin_data, trampolin_data_length)) {
|
|
DEBUG_FUNCTION_LINE("elfLink failed");
|
|
free(destinations);
|
|
return {};
|
|
}
|
|
}
|
|
}
|
|
std::vector<RelocationData> relocationData = getImportRelocationData(reader, destinations);
|
|
|
|
for (auto const &reloc : relocationData) {
|
|
moduleData.addRelocationData(reloc);
|
|
}
|
|
|
|
DCFlushRange((void *) baseOffset, totalSize);
|
|
ICInvalidateRange((void *) baseOffset, totalSize);
|
|
|
|
free(destinations);
|
|
|
|
moduleData.setEntrypoint(entrypoint);
|
|
DEBUG_FUNCTION_LINE("Saved entrypoint as %08X", entrypoint);
|
|
|
|
return moduleData;
|
|
}
|
|
|
|
|
|
std::vector<RelocationData> ModuleDataFactory::getImportRelocationData(const elfio &reader, uint8_t **destinations) {
|
|
std::vector<RelocationData> result;
|
|
std::map<uint32_t, std::string> infoMap;
|
|
|
|
uint32_t sec_num = reader.sections.size();
|
|
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if (psec->get_type() == 0x80000002) {
|
|
infoMap[i] = psec->get_name();
|
|
}
|
|
}
|
|
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if (psec->get_type() == SHT_RELA || psec->get_type() == SHT_REL) {
|
|
DEBUG_FUNCTION_LINE("Found relocation section %s", psec->get_name().c_str());
|
|
relocation_section_accessor rel(reader, psec);
|
|
for (uint32_t j = 0; j < (uint32_t) rel.get_entries_num(); ++j) {
|
|
Elf64_Addr offset;
|
|
Elf_Word type;
|
|
Elf_Sxword addend;
|
|
std::string sym_name;
|
|
Elf64_Addr sym_value;
|
|
Elf_Half sym_section_index;
|
|
|
|
if (!rel.get_entry(j, offset, sym_value, sym_name, type, addend, sym_section_index)) {
|
|
DEBUG_FUNCTION_LINE("Failed to get relocation");
|
|
break;
|
|
}
|
|
|
|
auto adjusted_sym_value = (uint32_t) sym_value;
|
|
if (adjusted_sym_value < 0xC0000000) {
|
|
continue;
|
|
}
|
|
std::optional<ImportRPLInformation> rplInfo = ImportRPLInformation::createImportRPLInformation(infoMap[sym_section_index]);
|
|
if (!rplInfo) {
|
|
DEBUG_FUNCTION_LINE("Failed to create import information");
|
|
break;
|
|
}
|
|
|
|
uint32_t section_index = psec->get_info();
|
|
|
|
// When these relocations are performed, we don't need the 0xC0000000 offset anymore.
|
|
RelocationData relocationData(type, offset - 0x02000000, addend, (void *) (destinations[section_index] + 0x02000000), sym_name, rplInfo.value());
|
|
//relocationData->printInformation();
|
|
result.push_back(relocationData);
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool ModuleDataFactory::linkSection(const elfio &reader, uint32_t section_index, uint32_t destination, uint32_t base_text, uint32_t base_data, relocation_trampolin_entry_t *trampolin_data, uint32_t trampolin_data_length) {
|
|
uint32_t sec_num = reader.sections.size();
|
|
|
|
for (uint32_t i = 0; i < sec_num; ++i) {
|
|
section *psec = reader.sections[i];
|
|
if (psec->get_info() == section_index) {
|
|
DEBUG_FUNCTION_LINE("Found relocation section %s", psec->get_name().c_str());
|
|
relocation_section_accessor rel(reader, psec);
|
|
for (uint32_t j = 0; j < (uint32_t) rel.get_entries_num(); ++j) {
|
|
Elf64_Addr offset;
|
|
Elf_Word type;
|
|
Elf_Sxword addend;
|
|
std::string sym_name;
|
|
Elf64_Addr sym_value;
|
|
Elf_Half sym_section_index;
|
|
|
|
if (!rel.get_entry(j, offset, sym_value, sym_name, type, addend, sym_section_index)) {
|
|
DEBUG_FUNCTION_LINE("Failed to get relocation");
|
|
break;
|
|
}
|
|
|
|
auto adjusted_sym_value = (uint32_t) sym_value;
|
|
if ((adjusted_sym_value >= 0x02000000) && adjusted_sym_value < 0x10000000) {
|
|
adjusted_sym_value -= 0x02000000;
|
|
adjusted_sym_value += base_text;
|
|
} else if ((adjusted_sym_value >= 0x10000000) && adjusted_sym_value < 0xC0000000) {
|
|
adjusted_sym_value -= 0x10000000;
|
|
adjusted_sym_value += base_data;
|
|
} else if (adjusted_sym_value >= 0xC0000000) {
|
|
// Skip imports
|
|
continue;
|
|
} else if (adjusted_sym_value == 0x0) {
|
|
//
|
|
} else {
|
|
DEBUG_FUNCTION_LINE("Unhandled case %08X", adjusted_sym_value);
|
|
return false;
|
|
}
|
|
|
|
if (sym_section_index == SHN_ABS) {
|
|
//
|
|
} else if (sym_section_index > SHN_LORESERVE) {
|
|
DEBUG_FUNCTION_LINE("NOT IMPLEMENTED: %04X", sym_section_index);
|
|
return false;
|
|
}
|
|
|
|
if (!ElfUtils::elfLinkOne(type, offset, addend, destination, adjusted_sym_value, trampolin_data, trampolin_data_length, RELOC_TYPE_FIXED)) {
|
|
DEBUG_FUNCTION_LINE("Link failed");
|
|
return false;
|
|
}
|
|
}
|
|
DEBUG_FUNCTION_LINE("done");
|
|
}
|
|
}
|
|
return true;
|
|
}
|