16f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines//===- ELFReaderTest.cpp --------------------------------------------------===// 26f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// 36f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// The MCLinker Project 46f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// 56f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// This file is distributed under the University of Illinois Open Source 66f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// License. See LICENSE.TXT for details. 76f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// 86f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines//===----------------------------------------------------------------------===// 937b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "ELFReaderTest.h" 106f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1137b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/IRBuilder.h" 1237b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/TargetOptions.h" 1337b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/LD/ELFReader.h" 1437b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/LD/LDContext.h" 1537b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/MC/Input.h" 1637b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Support/Path.h" 1737b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Support/MemoryArea.h" 186f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines#include <../lib/Target/X86/X86LDBackend.h> 196f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines#include <../lib/Target/X86/X86GNUInfo.h> 206f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 2137b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include <llvm/ADT/StringRef.h> 2237b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include <llvm/Support/ELF.h> 2337b74a387bb3993387029859c2d9d051c41c724eStephen Hines 2437b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include <cstdio> 256f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 266f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hinesusing namespace mcld; 276f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hinesusing namespace mcld::sys::fs; 286f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hinesusing namespace mcldtest; 296f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 306f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// Constructor can do set-up work for all test here. 3137b74a387bb3993387029859c2d9d051c41c724eStephen HinesELFReaderTest::ELFReaderTest() : m_pInput(NULL) { 326f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines m_pConfig = new LinkerConfig("x86_64-linux-gnueabi"); 3337b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pConfig->targets().setEndian(TargetOptions::Little); 3437b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pConfig->targets().setBitClass(64); 3537b74a387bb3993387029859c2d9d051c41c724eStephen Hines Relocation::SetUp(*m_pConfig); 366f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 37f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines m_pScript = new LinkerScript(); 3837b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pInfo = new X86_64GNUInfo(m_pConfig->targets().triple()); 3937b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pLDBackend = new X86_64GNULDBackend(*m_pConfig, m_pInfo); 4037b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pELFReader = new ELFReader<64, true>(*m_pLDBackend); 41f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines m_pModule = new Module(*m_pScript); 4237b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pIRBuilder = new IRBuilder(*m_pModule, *m_pConfig); 4337b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pELFObjReader = 4437b74a387bb3993387029859c2d9d051c41c724eStephen Hines new ELFObjectReader(*m_pLDBackend, *m_pIRBuilder, *m_pConfig); 456f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 466f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 476f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// Destructor can do clean-up work that doesn't throw exceptions here. 4837b74a387bb3993387029859c2d9d051c41c724eStephen HinesELFReaderTest::~ELFReaderTest() { 496f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pConfig; 506f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pLDBackend; 516f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pELFReader; 52f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines delete m_pScript; 536f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pModule; 546f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pIRBuilder; 556f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines delete m_pELFObjReader; 566f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 576f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 586f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// SetUp() will be called immediately before each test. 5937b74a387bb3993387029859c2d9d051c41c724eStephen Hinesvoid ELFReaderTest::SetUp() { 606f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines Path path(TOPDIR); 616f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines path.append("unittests/test_x86_64.o"); 626f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 636f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines m_pInput = m_pIRBuilder->ReadInput("test_x86_64", path); 6437b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(NULL != m_pInput); 656f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 666f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_TRUE(m_pInput->hasMemArea()); 676f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines size_t hdr_size = m_pELFReader->getELFHeaderSize(); 6837b74a387bb3993387029859c2d9d051c41c724eStephen Hines llvm::StringRef region = 6937b74a387bb3993387029859c2d9d051c41c724eStephen Hines m_pInput->memArea()->request(m_pInput->fileOffset(), hdr_size); 70f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines const char* ELF_hdr = region.begin(); 716f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines bool shdr_result = m_pELFReader->readSectionHeaders(*m_pInput, ELF_hdr); 726f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_TRUE(shdr_result); 736f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 746f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 756f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// TearDown() will be called immediately after each test. 7637b74a387bb3993387029859c2d9d051c41c724eStephen Hinesvoid ELFReaderTest::TearDown() { 776f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 786f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 796f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines//===----------------------------------------------------------------------===// 806f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines// Testcases 816f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines//===----------------------------------------------------------------------===// 8237b74a387bb3993387029859c2d9d051c41c724eStephen HinesTEST_F(ELFReaderTest, read_section_headers) { 83a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(m_pInput->context()->numOfSections(), 13u); 846f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines LDContext::const_sect_iterator iter = m_pInput->context()->sectBegin(); 8537b74a387bb3993387029859c2d9d051c41c724eStephen Hines ++iter; /// test section[1] 866f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(".text", (*iter)->name()); 876f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(llvm::ELF::SHT_PROGBITS, (*iter)->type()); 88a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(0x40u, (*iter)->offset()); 89a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(0x15u, (*iter)->size()); 9037b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(llvm::ELF::SHF_ALLOC & (*iter)->flag()); // AX 91a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(0x4u, (*iter)->align()); 926f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(NULL, (*iter)->getLink()); 93a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(0u, (*iter)->getInfo()); 946f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 956f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 9637b74a387bb3993387029859c2d9d051c41c724eStephen HinesTEST_F(ELFReaderTest, read_symbol_and_rela) { 976f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_TRUE(m_pInput->hasMemArea()); 986f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_TRUE(m_pInput->hasContext()); 996f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines m_pInput->setType(Input::Object); 1006f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1016f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // -- read symbols 1026f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines LDSection* symtab_shdr = m_pInput->context()->getSection(".symtab"); 10337b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(NULL != symtab_shdr); 1046f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1056f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines LDSection* strtab_shdr = symtab_shdr->getLink(); 10637b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(NULL != strtab_shdr); 1076f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 108f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines llvm::StringRef symtab_region = m_pInput->memArea()->request( 109f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines m_pInput->fileOffset() + symtab_shdr->offset(), symtab_shdr->size()); 1106f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 111f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines llvm::StringRef strtab_region = m_pInput->memArea()->request( 112f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines m_pInput->fileOffset() + strtab_shdr->offset(), strtab_shdr->size()); 113f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines const char* strtab = strtab_region.begin(); 11437b74a387bb3993387029859c2d9d051c41c724eStephen Hines bool result = m_pELFReader->readSymbols( 11537b74a387bb3993387029859c2d9d051c41c724eStephen Hines *m_pInput, *m_pIRBuilder, symtab_region, strtab); 1166f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_TRUE(result); 1176f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ("hello.c", std::string(m_pInput->context()->getSymbol(1)->name())); 1186f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ("puts", std::string(m_pInput->context()->getSymbol(10)->name())); 11937b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(NULL == m_pInput->context()->getSymbol(11)); 1206f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1216f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines // -- read relocations 1226f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines MemoryArea* mem = m_pInput->memArea(); 1236f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines LDContext::sect_iterator rs = m_pInput->context()->relocSectBegin(); 12437b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(rs != m_pInput->context()->relocSectEnd()); 1256f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(".rela.text", (*rs)->name()); 1266f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1276f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines uint64_t offset = m_pInput->fileOffset() + (*rs)->offset(); 1286f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines uint64_t size = (*rs)->size(); 129f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines llvm::StringRef region = mem->request(offset, size); 13037b74a387bb3993387029859c2d9d051c41c724eStephen Hines IRBuilder::CreateRelocData(**rs); /// create relocation data for the header 1316f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 1326f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(llvm::ELF::SHT_RELA, (*rs)->type()); 133f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines ASSERT_TRUE(m_pELFReader->readRela(*m_pInput, **rs, region)); 1346f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 13537b74a387bb3993387029859c2d9d051c41c724eStephen Hines const RelocData::RelocationListType& rRelocs = 13637b74a387bb3993387029859c2d9d051c41c724eStephen Hines (*rs)->getRelocData()->getRelocationList(); 1376f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines RelocData::const_iterator rReloc = rRelocs.begin(); 138a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(2u, rRelocs.size()); 13937b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(rRelocs.end() != rReloc); 14037b74a387bb3993387029859c2d9d051c41c724eStephen Hines ++rReloc; /// test rRelocs[1] 1416f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ("puts", std::string(rReloc->symInfo()->name())); 1426f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines ASSERT_EQ(llvm::ELF::R_X86_64_PC32, rReloc->type()); 143a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(0x0u, rReloc->symValue()); 144a6c24dff8b7fa2551a3a885e77a2e814f5b764a2Stephen Hines ASSERT_EQ(static_cast<mcld::Relocation::Address>(-0x4), rReloc->addend()); 1456f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 1466f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 14737b74a387bb3993387029859c2d9d051c41c724eStephen HinesTEST_F(ELFReaderTest, read_regular_sections) { 14837b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(m_pELFObjReader->readSections(*m_pInput)); 1496f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 1506f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines 15137b74a387bb3993387029859c2d9d051c41c724eStephen HinesTEST_F(ELFReaderTest, is_my_format) { 152f33f6de54db174aa679a4b6d1e040d37e95541c0Stephen Hines bool doContinue; 15337b74a387bb3993387029859c2d9d051c41c724eStephen Hines ASSERT_TRUE(m_pELFObjReader->isMyFormat(*m_pInput, doContinue)); 1546f75755c9204b1d8817ae5a65a2f7e5af0ec3f70Stephen Hines} 155