ELFObjectFileTest.cpp
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//===- ELFObjectFileTest.cpp - Tests for ELFObjectFile --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::object;
namespace {
// A struct to initialize a buffer to represent an ELF object file.
struct DataForTest {
std::vector<uint8_t> Data;
template <typename T>
std::vector<uint8_t> makeElfData(uint8_t Class, uint8_t Encoding,
uint16_t Machine) {
T Ehdr{}; // Zero-initialise the header.
Ehdr.e_ident[ELF::EI_MAG0] = 0x7f;
Ehdr.e_ident[ELF::EI_MAG1] = 'E';
Ehdr.e_ident[ELF::EI_MAG2] = 'L';
Ehdr.e_ident[ELF::EI_MAG3] = 'F';
Ehdr.e_ident[ELF::EI_CLASS] = Class;
Ehdr.e_ident[ELF::EI_DATA] = Encoding;
Ehdr.e_ident[ELF::EI_VERSION] = 1;
Ehdr.e_type = ELF::ET_REL;
Ehdr.e_machine = Machine;
Ehdr.e_version = 1;
Ehdr.e_ehsize = sizeof(T);
bool IsLittleEndian = Encoding == ELF::ELFDATA2LSB;
if (sys::IsLittleEndianHost != IsLittleEndian) {
sys::swapByteOrder(Ehdr.e_type);
sys::swapByteOrder(Ehdr.e_machine);
sys::swapByteOrder(Ehdr.e_version);
sys::swapByteOrder(Ehdr.e_ehsize);
}
uint8_t *EhdrBytes = reinterpret_cast<uint8_t *>(&Ehdr);
std::vector<uint8_t> Bytes;
std::copy(EhdrBytes, EhdrBytes + sizeof(Ehdr), std::back_inserter(Bytes));
return Bytes;
}
DataForTest(uint8_t Class, uint8_t Encoding, uint16_t Machine) {
if (Class == ELF::ELFCLASS64)
Data = makeElfData<ELF::Elf64_Ehdr>(Class, Encoding, Machine);
else {
assert(Class == ELF::ELFCLASS32);
Data = makeElfData<ELF::Elf32_Ehdr>(Class, Encoding, Machine);
}
}
};
void checkFormatAndArch(const DataForTest &D, StringRef Fmt,
Triple::ArchType Arch) {
Expected<std::unique_ptr<ObjectFile>> ELFObjOrErr =
object::ObjectFile::createELFObjectFile(
MemoryBufferRef(toStringRef(D.Data), "dummyELF"));
ASSERT_THAT_EXPECTED(ELFObjOrErr, Succeeded());
const ObjectFile &File = *(*ELFObjOrErr).get();
EXPECT_EQ(Fmt, File.getFileFormatName());
EXPECT_EQ(Arch, File.getArch());
}
std::array<DataForTest, 4> generateData(uint16_t Machine) {
return {DataForTest(ELF::ELFCLASS32, ELF::ELFDATA2LSB, Machine),
DataForTest(ELF::ELFCLASS32, ELF::ELFDATA2MSB, Machine),
DataForTest(ELF::ELFCLASS64, ELF::ELFDATA2LSB, Machine),
DataForTest(ELF::ELFCLASS64, ELF::ELFDATA2MSB, Machine)};
}
} // namespace
TEST(ELFObjectFileTest, MachineTestForNoneOrUnused) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_NONE))
checkFormatAndArch(D, Formats[I++], Triple::UnknownArch);
// Test an arbitrary unused EM_* value (255).
I = 0;
for (const DataForTest &D : generateData(255))
checkFormatAndArch(D, Formats[I++], Triple::UnknownArch);
}
TEST(ELFObjectFileTest, MachineTestForVE) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-ve", "elf64-ve"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_VE))
checkFormatAndArch(D, Formats[I++], Triple::ve);
}
TEST(ELFObjectFileTest, MachineTestForX86_64) {
std::array<StringRef, 4> Formats = {"elf32-x86-64", "elf32-x86-64",
"elf64-x86-64", "elf64-x86-64"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_X86_64))
checkFormatAndArch(D, Formats[I++], Triple::x86_64);
}
TEST(ELFObjectFileTest, MachineTestFor386) {
std::array<StringRef, 4> Formats = {"elf32-i386", "elf32-i386", "elf64-i386",
"elf64-i386"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_386))
checkFormatAndArch(D, Formats[I++], Triple::x86);
}
TEST(ELFObjectFileTest, MachineTestForMIPS) {
std::array<StringRef, 4> Formats = {"elf32-mips", "elf32-mips", "elf64-mips",
"elf64-mips"};
std::array<Triple::ArchType, 4> Archs = {Triple::mipsel, Triple::mips,
Triple::mips64el, Triple::mips64};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_MIPS)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForAMDGPU) {
std::array<StringRef, 4> Formats = {"elf32-amdgpu", "elf32-amdgpu",
"elf64-amdgpu", "elf64-amdgpu"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_AMDGPU))
checkFormatAndArch(D, Formats[I++], Triple::UnknownArch);
}
TEST(ELFObjectFileTest, MachineTestForIAMCU) {
std::array<StringRef, 4> Formats = {"elf32-iamcu", "elf32-iamcu",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_IAMCU))
checkFormatAndArch(D, Formats[I++], Triple::x86);
}
TEST(ELFObjectFileTest, MachineTestForAARCH64) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-littleaarch64",
"elf64-bigaarch64"};
std::array<Triple::ArchType, 4> Archs = {Triple::aarch64, Triple::aarch64_be,
Triple::aarch64, Triple::aarch64_be};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_AARCH64)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForPPC64) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-powerpcle", "elf64-powerpc"};
std::array<Triple::ArchType, 4> Archs = {Triple::ppc64le, Triple::ppc64,
Triple::ppc64le, Triple::ppc64};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_PPC64)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForPPC) {
std::array<StringRef, 4> Formats = {"elf32-powerpc", "elf32-powerpc",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_PPC))
checkFormatAndArch(D, Formats[I++], Triple::ppc);
}
TEST(ELFObjectFileTest, MachineTestForRISCV) {
std::array<StringRef, 4> Formats = {"elf32-littleriscv", "elf32-littleriscv",
"elf64-littleriscv", "elf64-littleriscv"};
std::array<Triple::ArchType, 4> Archs = {Triple::riscv32, Triple::riscv32,
Triple::riscv64, Triple::riscv64};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_RISCV)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForARM) {
std::array<StringRef, 4> Formats = {"elf32-littlearm", "elf32-bigarm",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_ARM))
checkFormatAndArch(D, Formats[I++], Triple::arm);
}
TEST(ELFObjectFileTest, MachineTestForS390) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-s390", "elf64-s390"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_S390))
checkFormatAndArch(D, Formats[I++], Triple::systemz);
}
TEST(ELFObjectFileTest, MachineTestForSPARCV9) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-sparc", "elf64-sparc"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_SPARCV9))
checkFormatAndArch(D, Formats[I++], Triple::sparcv9);
}
TEST(ELFObjectFileTest, MachineTestForSPARC) {
std::array<StringRef, 4> Formats = {"elf32-sparc", "elf32-sparc",
"elf64-unknown", "elf64-unknown"};
std::array<Triple::ArchType, 4> Archs = {Triple::sparcel, Triple::sparc,
Triple::sparcel, Triple::sparc};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_SPARC)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForSPARC32PLUS) {
std::array<StringRef, 4> Formats = {"elf32-sparc", "elf32-sparc",
"elf64-unknown", "elf64-unknown"};
std::array<Triple::ArchType, 4> Archs = {Triple::sparcel, Triple::sparc,
Triple::sparcel, Triple::sparc};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_SPARC32PLUS)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForBPF) {
std::array<StringRef, 4> Formats = {"elf32-unknown", "elf32-unknown",
"elf64-bpf", "elf64-bpf"};
std::array<Triple::ArchType, 4> Archs = {Triple::bpfel, Triple::bpfeb,
Triple::bpfel, Triple::bpfeb};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_BPF)) {
checkFormatAndArch(D, Formats[I], Archs[I]);
++I;
}
}
TEST(ELFObjectFileTest, MachineTestForAVR) {
std::array<StringRef, 4> Formats = {"elf32-avr", "elf32-avr", "elf64-unknown",
"elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_AVR))
checkFormatAndArch(D, Formats[I++], Triple::avr);
}
TEST(ELFObjectFileTest, MachineTestForHEXAGON) {
std::array<StringRef, 4> Formats = {"elf32-hexagon", "elf32-hexagon",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_HEXAGON))
checkFormatAndArch(D, Formats[I++], Triple::hexagon);
}
TEST(ELFObjectFileTest, MachineTestForLANAI) {
std::array<StringRef, 4> Formats = {"elf32-lanai", "elf32-lanai",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_LANAI))
checkFormatAndArch(D, Formats[I++], Triple::lanai);
}
TEST(ELFObjectFileTest, MachineTestForMSP430) {
std::array<StringRef, 4> Formats = {"elf32-msp430", "elf32-msp430",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_MSP430))
checkFormatAndArch(D, Formats[I++], Triple::msp430);
}
TEST(ELFObjectFileTest, MachineTestForCSKY) {
std::array<StringRef, 4> Formats = {"elf32-csky", "elf32-csky",
"elf64-unknown", "elf64-unknown"};
size_t I = 0;
for (const DataForTest &D : generateData(ELF::EM_CSKY))
checkFormatAndArch(D, Formats[I++], Triple::csky);
}
// ELF relative relocation type test.
TEST(ELFObjectFileTest, RelativeRelocationTypeTest) {
EXPECT_EQ(ELF::R_CKCORE_RELATIVE, getELFRelativeRelocationType(ELF::EM_CSKY));
}