132 lines
5.0 KiB
C++
132 lines
5.0 KiB
C++
#include <domain/Types.hpp>
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#include <io/FileReader.hpp>
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#include <io/FileWriter.hpp>
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#include <elfpatcher/linux/LinuxElfPatcher.hpp>
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#include <elfpatcher/general/SegmentFilter.hpp>
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#include <elfpatcher/general/EntryStubBuilder.hpp>
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#include <elfpatcher/general/ProgramHeaderLayoutBuilder.hpp>
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#include <elfpatcher/general/SectionHeaderTableBuilder.hpp>
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#include <io/ByteWriter.hpp>
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#include <relinker/parsing/ElfReader.hpp>
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#include <relinker/analysis/ValidationPolicy.hpp>
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#include <relinker/analysis/SyscallScanner.hpp>
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#include <relinker/analysis/CallSiteResolver.hpp>
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#include <relinker/analysis/UnusedNidFilter.hpp>
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#include <relinker/output/SysVDynamicSectionBuilder.hpp>
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#include <relinker/output/CallRegistryWriter.hpp>
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#include <relinker/pipeline/RelinkerPipeline.hpp>
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#include <codegen/IAmd64OnlyConverter.hpp>
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#include <filesystem>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <optional>
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int main(const int argc, char* argv[]) {
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bool skipSyscallCheck = false;
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bool toIntel = false;
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bool skipUnusedNidFilter = false;
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bool writeRegistry = false;
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std::string inputPath;
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std::string outputPath;
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std::string runPath = "$ORIGIN/libs";
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for (int i = 1; i < argc; ++i) {
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const std::string arg = argv[i];
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if (arg == "--skip-syscall-check") {
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skipSyscallCheck = true;
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} else if (arg == "--to-intel") {
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toIntel = true;
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} else if (arg == "--skip-unused-nid-filter") {
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skipUnusedNidFilter = true;
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} else if (arg == "--registry") {
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writeRegistry = true;
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} else if (arg == "--rpath") {
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if (i + 1 >= argc) {
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std::cerr << "FAIL: --rpath requires a value\n";
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return 1;
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}
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runPath = argv[++i];
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} else if (inputPath.empty()) {
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inputPath = arg;
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} else if (outputPath.empty()) {
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outputPath = arg;
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} else {
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std::cerr << "FAIL: unexpected argument: " << arg << "\n";
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return 1;
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}
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}
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if (inputPath.empty() || outputPath.empty()) {
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std::cerr << "Usage: relinker [--skip-syscall-check] [--to-intel] [--skip-unused-nid-filter] [--registry] [--rpath <path>] <input.elf> <output.elf>\n"
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"Example: relinker input.elf output.elf\n";
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return 1;
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}
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try {
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Io::FileReader fileReader;
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Io::FileWriter fileWriter;
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auto sourceBytes = fileReader.Read(inputPath);
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if (toIntel) {
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const Relinker::ElfReader elfReader(sourceBytes);
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const auto converter = Codegen::MakeAmd64OnlyConverter();
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auto result = converter->Convert(std::move(sourceBytes), elfReader.ReadCodeSegments());
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fileWriter.Write(outputPath, std::move(result.Bytes));
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std::cout << "OK: " << result.ReplacedCount << " instructions replaced\n";
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return 0;
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}
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auto elfReader = std::make_shared<Relinker::ElfReader>(sourceBytes);
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auto syscallScanner = skipSyscallCheck
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? Relinker::MakeNullSyscallScanner()
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: Relinker::MakeSyscallScanner();
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const auto pipeline = std::make_shared<Relinker::RelinkerPipeline>(
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elfReader,
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std::move(syscallScanner),
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Relinker::MakeCallSiteResolver(),
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std::make_shared<Relinker::ValidationPolicy>(),
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std::make_shared<Relinker::SysVDynamicSectionBuilder>(),
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Relinker::MakeUnusedNidFilter(),
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!skipUnusedNidFilter
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);
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auto result = pipeline->Relink(sourceBytes);
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if (writeRegistry) {
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const std::filesystem::path outFsPath(outputPath);
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const std::string registryPath = (outFsPath.parent_path() / (outFsPath.stem().string() + ".registry.json")).string();
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auto callRegistryWriter = std::make_shared<Relinker::CallRegistryWriter>();
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fileWriter.Write(registryPath, callRegistryWriter->WriteCallRegistry(result.RegistryEntries));
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}
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auto byteWriter = std::make_shared<Io::ByteWriter>();
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Elfpatcher::Linux::LinuxElfPatcher elfPatcher(
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std::make_shared<Elfpatcher::EntryStubBuilder>(),
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std::make_shared<Elfpatcher::ProgramHeaderLayoutBuilder>(
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std::make_shared<Elfpatcher::SegmentFilter>(),
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byteWriter
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),
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std::make_shared<Elfpatcher::SectionHeaderTableBuilder>(byteWriter),
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byteWriter
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);
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auto patchedElf = elfPatcher.Patch(sourceBytes, result.OriginalHeaders, result.DynamicSection, result.OriginalPltGotVaddr, runPath);
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fileWriter.Write(outputPath, patchedElf);
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} catch (const Domain::RelinkerException& e) {
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std::cerr << "FAIL: " << e.what();
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if (e.FailureOffset != 0)
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std::cerr << " (offset 0x" << std::hex << e.FailureOffset << ")";
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std::cerr << "\n";
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return 2;
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} catch (const std::exception& e) {
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std::cerr << "FAIL: " << e.what() << "\n";
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return 2;
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}
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return 0;
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}
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