1 //===- ELFReaderTest.cpp --------------------------------------------------===//
2 //
3 // The MCLinker Project
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #include "ELFReaderTest.h"
10
11 #include "mcld/IRBuilder.h"
12 #include "mcld/TargetOptions.h"
13 #include "mcld/LD/ELFReader.h"
14 #include "mcld/LD/LDContext.h"
15 #include "mcld/MC/Input.h"
16 #include "mcld/Support/Path.h"
17 #include "mcld/Support/MemoryArea.h"
18 #include <../lib/Target/X86/X86LDBackend.h>
19 #include <../lib/Target/X86/X86GNUInfo.h>
20
21 #include <llvm/ADT/StringRef.h>
22 #include <llvm/Support/ELF.h>
23
24 #include <cstdio>
25
26 using namespace mcld;
27 using namespace mcld::sys::fs;
28 using namespace mcldtest;
29
30 // Constructor can do set-up work for all test here.
ELFReaderTest()31 ELFReaderTest::ELFReaderTest() : m_pInput(NULL) {
32 m_pConfig = new LinkerConfig("x86_64-linux-gnueabi");
33 m_pConfig->targets().setEndian(TargetOptions::Little);
34 m_pConfig->targets().setBitClass(64);
35 Relocation::SetUp(*m_pConfig);
36
37 m_pScript = new LinkerScript();
38 m_pInfo = new X86_64GNUInfo(m_pConfig->targets().triple());
39 m_pLDBackend = new X86_64GNULDBackend(*m_pConfig, m_pInfo);
40 m_pELFReader = new ELFReader<64, true>(*m_pLDBackend);
41 m_pModule = new Module(*m_pScript);
42 m_pIRBuilder = new IRBuilder(*m_pModule, *m_pConfig);
43 m_pELFObjReader =
44 new ELFObjectReader(*m_pLDBackend, *m_pIRBuilder, *m_pConfig);
45 }
46
47 // Destructor can do clean-up work that doesn't throw exceptions here.
~ELFReaderTest()48 ELFReaderTest::~ELFReaderTest() {
49 delete m_pConfig;
50 delete m_pLDBackend;
51 delete m_pELFReader;
52 delete m_pScript;
53 delete m_pModule;
54 delete m_pIRBuilder;
55 delete m_pELFObjReader;
56 }
57
58 // SetUp() will be called immediately before each test.
SetUp()59 void ELFReaderTest::SetUp() {
60 Path path(TOPDIR);
61 path.append("unittests/test_x86_64.o");
62
63 m_pInput = m_pIRBuilder->ReadInput("test_x86_64", path);
64 ASSERT_TRUE(NULL != m_pInput);
65
66 ASSERT_TRUE(m_pInput->hasMemArea());
67 size_t hdr_size = m_pELFReader->getELFHeaderSize();
68 llvm::StringRef region =
69 m_pInput->memArea()->request(m_pInput->fileOffset(), hdr_size);
70 const char* ELF_hdr = region.begin();
71 bool shdr_result = m_pELFReader->readSectionHeaders(*m_pInput, ELF_hdr);
72 ASSERT_TRUE(shdr_result);
73 }
74
75 // TearDown() will be called immediately after each test.
TearDown()76 void ELFReaderTest::TearDown() {
77 }
78
79 //===----------------------------------------------------------------------===//
80 // Testcases
81 //===----------------------------------------------------------------------===//
TEST_F(ELFReaderTest,read_section_headers)82 TEST_F(ELFReaderTest, read_section_headers) {
83 ASSERT_EQ(m_pInput->context()->numOfSections(), 13u);
84 LDContext::const_sect_iterator iter = m_pInput->context()->sectBegin();
85 ++iter; /// test section[1]
86 ASSERT_EQ(".text", (*iter)->name());
87 ASSERT_EQ(llvm::ELF::SHT_PROGBITS, (*iter)->type());
88 ASSERT_EQ(0x40u, (*iter)->offset());
89 ASSERT_EQ(0x15u, (*iter)->size());
90 ASSERT_TRUE(llvm::ELF::SHF_ALLOC & (*iter)->flag()); // AX
91 ASSERT_EQ(0x4u, (*iter)->align());
92 ASSERT_EQ(NULL, (*iter)->getLink());
93 ASSERT_EQ(0u, (*iter)->getInfo());
94 }
95
TEST_F(ELFReaderTest,read_symbol_and_rela)96 TEST_F(ELFReaderTest, read_symbol_and_rela) {
97 ASSERT_TRUE(m_pInput->hasMemArea());
98 ASSERT_TRUE(m_pInput->hasContext());
99 m_pInput->setType(Input::Object);
100
101 // -- read symbols
102 LDSection* symtab_shdr = m_pInput->context()->getSection(".symtab");
103 ASSERT_TRUE(NULL != symtab_shdr);
104
105 LDSection* strtab_shdr = symtab_shdr->getLink();
106 ASSERT_TRUE(NULL != strtab_shdr);
107
108 llvm::StringRef symtab_region = m_pInput->memArea()->request(
109 m_pInput->fileOffset() + symtab_shdr->offset(), symtab_shdr->size());
110
111 llvm::StringRef strtab_region = m_pInput->memArea()->request(
112 m_pInput->fileOffset() + strtab_shdr->offset(), strtab_shdr->size());
113 const char* strtab = strtab_region.begin();
114 bool result = m_pELFReader->readSymbols(
115 *m_pInput, *m_pIRBuilder, symtab_region, strtab);
116 ASSERT_TRUE(result);
117 ASSERT_EQ("hello.c", std::string(m_pInput->context()->getSymbol(1)->name()));
118 ASSERT_EQ("puts", std::string(m_pInput->context()->getSymbol(10)->name()));
119 ASSERT_TRUE(NULL == m_pInput->context()->getSymbol(11));
120
121 // -- read relocations
122 MemoryArea* mem = m_pInput->memArea();
123 LDContext::sect_iterator rs = m_pInput->context()->relocSectBegin();
124 ASSERT_TRUE(rs != m_pInput->context()->relocSectEnd());
125 ASSERT_EQ(".rela.text", (*rs)->name());
126
127 uint64_t offset = m_pInput->fileOffset() + (*rs)->offset();
128 uint64_t size = (*rs)->size();
129 llvm::StringRef region = mem->request(offset, size);
130 IRBuilder::CreateRelocData(**rs); /// create relocation data for the header
131
132 ASSERT_EQ(llvm::ELF::SHT_RELA, (*rs)->type());
133 ASSERT_TRUE(m_pELFReader->readRela(*m_pInput, **rs, region));
134
135 const RelocData::RelocationListType& rRelocs =
136 (*rs)->getRelocData()->getRelocationList();
137 RelocData::const_iterator rReloc = rRelocs.begin();
138 ASSERT_EQ(2u, rRelocs.size());
139 ASSERT_TRUE(rRelocs.end() != rReloc);
140 ++rReloc; /// test rRelocs[1]
141 ASSERT_EQ("puts", std::string(rReloc->symInfo()->name()));
142 ASSERT_EQ(llvm::ELF::R_X86_64_PC32, rReloc->type());
143 ASSERT_EQ(0x0u, rReloc->symValue());
144 ASSERT_EQ(static_cast<mcld::Relocation::Address>(-0x4), rReloc->addend());
145 }
146
TEST_F(ELFReaderTest,read_regular_sections)147 TEST_F(ELFReaderTest, read_regular_sections) {
148 ASSERT_TRUE(m_pELFObjReader->readSections(*m_pInput));
149 }
150
TEST_F(ELFReaderTest,is_my_format)151 TEST_F(ELFReaderTest, is_my_format) {
152 bool doContinue;
153 ASSERT_TRUE(m_pELFObjReader->isMyFormat(*m_pInput, doContinue));
154 }
155