1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package elf 6 7 import ( 8 "bytes" 9 "compress/gzip" 10 "debug/dwarf" 11 "encoding/binary" 12 "io" 13 "net" 14 "os" 15 "path" 16 "reflect" 17 "runtime" 18 "testing" 19 ) 20 21 type fileTest struct { 22 file string 23 hdr FileHeader 24 sections []SectionHeader 25 progs []ProgHeader 26 needed []string 27 } 28 29 var fileTests = []fileTest{ 30 { 31 "testdata/gcc-386-freebsd-exec", 32 FileHeader{ELFCLASS32, ELFDATA2LSB, EV_CURRENT, ELFOSABI_FREEBSD, 0, binary.LittleEndian, ET_EXEC, EM_386, 0x80483cc}, 33 []SectionHeader{ 34 {"", SHT_NULL, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 35 {".interp", SHT_PROGBITS, SHF_ALLOC, 0x80480d4, 0xd4, 0x15, 0x0, 0x0, 0x1, 0x0}, 36 {".hash", SHT_HASH, SHF_ALLOC, 0x80480ec, 0xec, 0x90, 0x3, 0x0, 0x4, 0x4}, 37 {".dynsym", SHT_DYNSYM, SHF_ALLOC, 0x804817c, 0x17c, 0x110, 0x4, 0x1, 0x4, 0x10}, 38 {".dynstr", SHT_STRTAB, SHF_ALLOC, 0x804828c, 0x28c, 0xbb, 0x0, 0x0, 0x1, 0x0}, 39 {".rel.plt", SHT_REL, SHF_ALLOC, 0x8048348, 0x348, 0x20, 0x3, 0x7, 0x4, 0x8}, 40 {".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x8048368, 0x368, 0x11, 0x0, 0x0, 0x4, 0x0}, 41 {".plt", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x804837c, 0x37c, 0x50, 0x0, 0x0, 0x4, 0x4}, 42 {".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x80483cc, 0x3cc, 0x180, 0x0, 0x0, 0x4, 0x0}, 43 {".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x804854c, 0x54c, 0xc, 0x0, 0x0, 0x4, 0x0}, 44 {".rodata", SHT_PROGBITS, SHF_ALLOC, 0x8048558, 0x558, 0xa3, 0x0, 0x0, 0x1, 0x0}, 45 {".data", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80495fc, 0x5fc, 0xc, 0x0, 0x0, 0x4, 0x0}, 46 {".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x8049608, 0x608, 0x4, 0x0, 0x0, 0x4, 0x0}, 47 {".dynamic", SHT_DYNAMIC, SHF_WRITE + SHF_ALLOC, 0x804960c, 0x60c, 0x98, 0x4, 0x0, 0x4, 0x8}, 48 {".ctors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496a4, 0x6a4, 0x8, 0x0, 0x0, 0x4, 0x0}, 49 {".dtors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496ac, 0x6ac, 0x8, 0x0, 0x0, 0x4, 0x0}, 50 {".jcr", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496b4, 0x6b4, 0x4, 0x0, 0x0, 0x4, 0x0}, 51 {".got", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496b8, 0x6b8, 0x1c, 0x0, 0x0, 0x4, 0x4}, 52 {".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x80496d4, 0x6d4, 0x20, 0x0, 0x0, 0x4, 0x0}, 53 {".comment", SHT_PROGBITS, 0x0, 0x0, 0x6d4, 0x12d, 0x0, 0x0, 0x1, 0x0}, 54 {".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x801, 0x20, 0x0, 0x0, 0x1, 0x0}, 55 {".debug_pubnames", SHT_PROGBITS, 0x0, 0x0, 0x821, 0x1b, 0x0, 0x0, 0x1, 0x0}, 56 {".debug_info", SHT_PROGBITS, 0x0, 0x0, 0x83c, 0x11d, 0x0, 0x0, 0x1, 0x0}, 57 {".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0x959, 0x41, 0x0, 0x0, 0x1, 0x0}, 58 {".debug_line", SHT_PROGBITS, 0x0, 0x0, 0x99a, 0x35, 0x0, 0x0, 0x1, 0x0}, 59 {".debug_frame", SHT_PROGBITS, 0x0, 0x0, 0x9d0, 0x30, 0x0, 0x0, 0x4, 0x0}, 60 {".debug_str", SHT_PROGBITS, 0x0, 0x0, 0xa00, 0xd, 0x0, 0x0, 0x1, 0x0}, 61 {".shstrtab", SHT_STRTAB, 0x0, 0x0, 0xa0d, 0xf8, 0x0, 0x0, 0x1, 0x0}, 62 {".symtab", SHT_SYMTAB, 0x0, 0x0, 0xfb8, 0x4b0, 0x1d, 0x38, 0x4, 0x10}, 63 {".strtab", SHT_STRTAB, 0x0, 0x0, 0x1468, 0x206, 0x0, 0x0, 0x1, 0x0}, 64 }, 65 []ProgHeader{ 66 {PT_PHDR, PF_R + PF_X, 0x34, 0x8048034, 0x8048034, 0xa0, 0xa0, 0x4}, 67 {PT_INTERP, PF_R, 0xd4, 0x80480d4, 0x80480d4, 0x15, 0x15, 0x1}, 68 {PT_LOAD, PF_R + PF_X, 0x0, 0x8048000, 0x8048000, 0x5fb, 0x5fb, 0x1000}, 69 {PT_LOAD, PF_R + PF_W, 0x5fc, 0x80495fc, 0x80495fc, 0xd8, 0xf8, 0x1000}, 70 {PT_DYNAMIC, PF_R + PF_W, 0x60c, 0x804960c, 0x804960c, 0x98, 0x98, 0x4}, 71 }, 72 []string{"libc.so.6"}, 73 }, 74 { 75 "testdata/gcc-amd64-linux-exec", 76 FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0, binary.LittleEndian, ET_EXEC, EM_X86_64, 0x4003e0}, 77 []SectionHeader{ 78 {"", SHT_NULL, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 79 {".interp", SHT_PROGBITS, SHF_ALLOC, 0x400200, 0x200, 0x1c, 0x0, 0x0, 0x1, 0x0}, 80 {".note.ABI-tag", SHT_NOTE, SHF_ALLOC, 0x40021c, 0x21c, 0x20, 0x0, 0x0, 0x4, 0x0}, 81 {".hash", SHT_HASH, SHF_ALLOC, 0x400240, 0x240, 0x24, 0x5, 0x0, 0x8, 0x4}, 82 {".gnu.hash", SHT_LOOS + 268435446, SHF_ALLOC, 0x400268, 0x268, 0x1c, 0x5, 0x0, 0x8, 0x0}, 83 {".dynsym", SHT_DYNSYM, SHF_ALLOC, 0x400288, 0x288, 0x60, 0x6, 0x1, 0x8, 0x18}, 84 {".dynstr", SHT_STRTAB, SHF_ALLOC, 0x4002e8, 0x2e8, 0x3d, 0x0, 0x0, 0x1, 0x0}, 85 {".gnu.version", SHT_HIOS, SHF_ALLOC, 0x400326, 0x326, 0x8, 0x5, 0x0, 0x2, 0x2}, 86 {".gnu.version_r", SHT_LOOS + 268435454, SHF_ALLOC, 0x400330, 0x330, 0x20, 0x6, 0x1, 0x8, 0x0}, 87 {".rela.dyn", SHT_RELA, SHF_ALLOC, 0x400350, 0x350, 0x18, 0x5, 0x0, 0x8, 0x18}, 88 {".rela.plt", SHT_RELA, SHF_ALLOC, 0x400368, 0x368, 0x30, 0x5, 0xc, 0x8, 0x18}, 89 {".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x400398, 0x398, 0x18, 0x0, 0x0, 0x4, 0x0}, 90 {".plt", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x4003b0, 0x3b0, 0x30, 0x0, 0x0, 0x4, 0x10}, 91 {".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x4003e0, 0x3e0, 0x1b4, 0x0, 0x0, 0x10, 0x0}, 92 {".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x400594, 0x594, 0xe, 0x0, 0x0, 0x4, 0x0}, 93 {".rodata", SHT_PROGBITS, SHF_ALLOC, 0x4005a4, 0x5a4, 0x11, 0x0, 0x0, 0x4, 0x0}, 94 {".eh_frame_hdr", SHT_PROGBITS, SHF_ALLOC, 0x4005b8, 0x5b8, 0x24, 0x0, 0x0, 0x4, 0x0}, 95 {".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x4005e0, 0x5e0, 0xa4, 0x0, 0x0, 0x8, 0x0}, 96 {".ctors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600688, 0x688, 0x10, 0x0, 0x0, 0x8, 0x0}, 97 {".dtors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600698, 0x698, 0x10, 0x0, 0x0, 0x8, 0x0}, 98 {".jcr", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x6006a8, 0x6a8, 0x8, 0x0, 0x0, 0x8, 0x0}, 99 {".dynamic", SHT_DYNAMIC, SHF_WRITE + SHF_ALLOC, 0x6006b0, 0x6b0, 0x1a0, 0x6, 0x0, 0x8, 0x10}, 100 {".got", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600850, 0x850, 0x8, 0x0, 0x0, 0x8, 0x8}, 101 {".got.plt", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600858, 0x858, 0x28, 0x0, 0x0, 0x8, 0x8}, 102 {".data", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600880, 0x880, 0x18, 0x0, 0x0, 0x8, 0x0}, 103 {".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x600898, 0x898, 0x8, 0x0, 0x0, 0x4, 0x0}, 104 {".comment", SHT_PROGBITS, 0x0, 0x0, 0x898, 0x126, 0x0, 0x0, 0x1, 0x0}, 105 {".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x9c0, 0x90, 0x0, 0x0, 0x10, 0x0}, 106 {".debug_pubnames", SHT_PROGBITS, 0x0, 0x0, 0xa50, 0x25, 0x0, 0x0, 0x1, 0x0}, 107 {".debug_info", SHT_PROGBITS, 0x0, 0x0, 0xa75, 0x1a7, 0x0, 0x0, 0x1, 0x0}, 108 {".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0xc1c, 0x6f, 0x0, 0x0, 0x1, 0x0}, 109 {".debug_line", SHT_PROGBITS, 0x0, 0x0, 0xc8b, 0x13f, 0x0, 0x0, 0x1, 0x0}, 110 {".debug_str", SHT_PROGBITS, SHF_MERGE + SHF_STRINGS, 0x0, 0xdca, 0xb1, 0x0, 0x0, 0x1, 0x1}, 111 {".debug_ranges", SHT_PROGBITS, 0x0, 0x0, 0xe80, 0x90, 0x0, 0x0, 0x10, 0x0}, 112 {".shstrtab", SHT_STRTAB, 0x0, 0x0, 0xf10, 0x149, 0x0, 0x0, 0x1, 0x0}, 113 {".symtab", SHT_SYMTAB, 0x0, 0x0, 0x19a0, 0x6f0, 0x24, 0x39, 0x8, 0x18}, 114 {".strtab", SHT_STRTAB, 0x0, 0x0, 0x2090, 0x1fc, 0x0, 0x0, 0x1, 0x0}, 115 }, 116 []ProgHeader{ 117 {PT_PHDR, PF_R + PF_X, 0x40, 0x400040, 0x400040, 0x1c0, 0x1c0, 0x8}, 118 {PT_INTERP, PF_R, 0x200, 0x400200, 0x400200, 0x1c, 0x1c, 1}, 119 {PT_LOAD, PF_R + PF_X, 0x0, 0x400000, 0x400000, 0x684, 0x684, 0x200000}, 120 {PT_LOAD, PF_R + PF_W, 0x688, 0x600688, 0x600688, 0x210, 0x218, 0x200000}, 121 {PT_DYNAMIC, PF_R + PF_W, 0x6b0, 0x6006b0, 0x6006b0, 0x1a0, 0x1a0, 0x8}, 122 {PT_NOTE, PF_R, 0x21c, 0x40021c, 0x40021c, 0x20, 0x20, 0x4}, 123 {PT_LOOS + 0x474E550, PF_R, 0x5b8, 0x4005b8, 0x4005b8, 0x24, 0x24, 0x4}, 124 {PT_LOOS + 0x474E551, PF_R + PF_W, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8}, 125 }, 126 []string{"libc.so.6"}, 127 }, 128 { 129 "testdata/hello-world-core.gz", 130 FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0x0, binary.LittleEndian, ET_CORE, EM_X86_64, 0x0}, 131 []SectionHeader{}, 132 []ProgHeader{ 133 {Type: PT_NOTE, Flags: 0x0, Off: 0x3f8, Vaddr: 0x0, Paddr: 0x0, Filesz: 0x8ac, Memsz: 0x0, Align: 0x0}, 134 {Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x1000, Vaddr: 0x400000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1000, Align: 0x1000}, 135 {Type: PT_LOAD, Flags: PF_R, Off: 0x1000, Vaddr: 0x401000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000}, 136 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x2000, Vaddr: 0x402000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000}, 137 {Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3000, Vaddr: 0x7f54078b8000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1b5000, Align: 0x1000}, 138 {Type: PT_LOAD, Flags: 0x0, Off: 0x3000, Vaddr: 0x7f5407a6d000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1ff000, Align: 0x1000}, 139 {Type: PT_LOAD, Flags: PF_R, Off: 0x3000, Vaddr: 0x7f5407c6c000, Paddr: 0x0, Filesz: 0x4000, Memsz: 0x4000, Align: 0x1000}, 140 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x7000, Vaddr: 0x7f5407c70000, Paddr: 0x0, Filesz: 0x2000, Memsz: 0x2000, Align: 0x1000}, 141 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x9000, Vaddr: 0x7f5407c72000, Paddr: 0x0, Filesz: 0x5000, Memsz: 0x5000, Align: 0x1000}, 142 {Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0xe000, Vaddr: 0x7f5407c77000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x22000, Align: 0x1000}, 143 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0xe000, Vaddr: 0x7f5407e81000, Paddr: 0x0, Filesz: 0x3000, Memsz: 0x3000, Align: 0x1000}, 144 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x11000, Vaddr: 0x7f5407e96000, Paddr: 0x0, Filesz: 0x3000, Memsz: 0x3000, Align: 0x1000}, 145 {Type: PT_LOAD, Flags: PF_R, Off: 0x14000, Vaddr: 0x7f5407e99000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000}, 146 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x15000, Vaddr: 0x7f5407e9a000, Paddr: 0x0, Filesz: 0x2000, Memsz: 0x2000, Align: 0x1000}, 147 {Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x17000, Vaddr: 0x7fff79972000, Paddr: 0x0, Filesz: 0x23000, Memsz: 0x23000, Align: 0x1000}, 148 {Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3a000, Vaddr: 0x7fff799f8000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000}, 149 {Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3b000, Vaddr: 0xffffffffff600000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000}, 150 }, 151 nil, 152 }, 153 } 154 155 func TestOpen(t *testing.T) { 156 for i := range fileTests { 157 tt := &fileTests[i] 158 159 var f *File 160 var err error 161 if path.Ext(tt.file) == ".gz" { 162 var r io.ReaderAt 163 if r, err = decompress(tt.file); err == nil { 164 f, err = NewFile(r) 165 } 166 } else { 167 f, err = Open(tt.file) 168 } 169 if err != nil { 170 t.Errorf("cannot open file %s: %v", tt.file, err) 171 continue 172 } 173 defer f.Close() 174 if !reflect.DeepEqual(f.FileHeader, tt.hdr) { 175 t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr) 176 continue 177 } 178 for i, s := range f.Sections { 179 if i >= len(tt.sections) { 180 break 181 } 182 sh := &tt.sections[i] 183 if !reflect.DeepEqual(&s.SectionHeader, sh) { 184 t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, &s.SectionHeader, sh) 185 } 186 } 187 for i, p := range f.Progs { 188 if i >= len(tt.progs) { 189 break 190 } 191 ph := &tt.progs[i] 192 if !reflect.DeepEqual(&p.ProgHeader, ph) { 193 t.Errorf("open %s, program %d:\n\thave %#v\n\twant %#v\n", tt.file, i, &p.ProgHeader, ph) 194 } 195 } 196 tn := len(tt.sections) 197 fn := len(f.Sections) 198 if tn != fn { 199 t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn) 200 } 201 tn = len(tt.progs) 202 fn = len(f.Progs) 203 if tn != fn { 204 t.Errorf("open %s: len(Progs) = %d, want %d", tt.file, fn, tn) 205 } 206 tl := tt.needed 207 fl, err := f.ImportedLibraries() 208 if err != nil { 209 t.Error(err) 210 } 211 if !reflect.DeepEqual(tl, fl) { 212 t.Errorf("open %s: DT_NEEDED = %v, want %v", tt.file, tl, fl) 213 } 214 } 215 } 216 217 // elf.NewFile requires io.ReaderAt, which compress/gzip cannot 218 // provide. Decompress the file to a bytes.Reader. 219 func decompress(gz string) (io.ReaderAt, error) { 220 in, err := os.Open(gz) 221 if err != nil { 222 return nil, err 223 } 224 defer in.Close() 225 r, err := gzip.NewReader(in) 226 if err != nil { 227 return nil, err 228 } 229 var out bytes.Buffer 230 _, err = io.Copy(&out, r) 231 return bytes.NewReader(out.Bytes()), err 232 } 233 234 type relocationTestEntry struct { 235 entryNumber int 236 entry *dwarf.Entry 237 } 238 239 type relocationTest struct { 240 file string 241 entries []relocationTestEntry 242 } 243 244 var relocationTests = []relocationTest{ 245 { 246 "testdata/go-relocation-test-gcc441-x86-64.obj", 247 []relocationTestEntry{ 248 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.4.1", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "go-relocation-test.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrHighpc, Val: uint64(0x6), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 249 }, 250 }, 251 { 252 "testdata/go-relocation-test-gcc441-x86.obj", 253 []relocationTestEntry{ 254 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.4.1", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "t.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrHighpc, Val: uint64(0x5), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 255 }, 256 }, 257 { 258 "testdata/go-relocation-test-gcc424-x86-64.obj", 259 []relocationTestEntry{ 260 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.2.4 (Ubuntu 4.2.4-1ubuntu4)", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "go-relocation-test-gcc424.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrHighpc, Val: uint64(0x6), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 261 }, 262 }, 263 { 264 "testdata/go-relocation-test-gcc482-aarch64.obj", 265 []relocationTestEntry{ 266 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.8.2 -g -fstack-protector", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "go-relocation-test-gcc482.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrHighpc, Val: int64(0x24), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 267 }, 268 }, 269 { 270 "testdata/go-relocation-test-gcc492-arm.obj", 271 []relocationTestEntry{ 272 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.9.2 20141224 (prerelease) -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -mtls-dialect=gnu -g", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "go-relocation-test-gcc492.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrCompDir, Val: "/root/go/src/debug/elf/testdata", Class: dwarf.ClassString}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, {Attr: dwarf.AttrHighpc, Val: int64(0x28), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 273 }, 274 }, 275 { 276 "testdata/go-relocation-test-clang-arm.obj", 277 []relocationTestEntry{ 278 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{dwarf.Field{Attr: dwarf.AttrProducer, Val: "Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant}, dwarf.Field{Attr: dwarf.AttrName, Val: "hello.c", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrStmtList, Val: int64(0x0), Class: dwarf.ClassLinePtr}, dwarf.Field{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, dwarf.Field{Attr: dwarf.AttrHighpc, Val: int64(48), Class: dwarf.ClassConstant}}}}, 279 }, 280 }, 281 { 282 "testdata/go-relocation-test-gcc5-ppc.obj", 283 []relocationTestEntry{ 284 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{dwarf.Field{Attr: dwarf.AttrProducer, Val: "GNU C11 5.0.0 20150116 (experimental) -Asystem=linux -Asystem=unix -Asystem=posix -g", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant}, dwarf.Field{Attr: dwarf.AttrName, Val: "go-relocation-test-gcc5-ppc.c", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, dwarf.Field{Attr: dwarf.AttrHighpc, Val: int64(0x44), Class: dwarf.ClassConstant}, dwarf.Field{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 285 }, 286 }, 287 { 288 "testdata/go-relocation-test-gcc482-ppc64le.obj", 289 []relocationTestEntry{ 290 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{dwarf.Field{Attr: dwarf.AttrProducer, Val: "GNU C 4.8.2 -Asystem=linux -Asystem=unix -Asystem=posix -msecure-plt -mtune=power8 -mcpu=power7 -gdwarf-2 -fstack-protector", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant}, dwarf.Field{Attr: dwarf.AttrName, Val: "go-relocation-test-gcc482-ppc64le.c", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}, dwarf.Field{Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress}, dwarf.Field{Attr: dwarf.AttrHighpc, Val: uint64(0x24), Class: dwarf.ClassAddress}, dwarf.Field{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}}}}, 291 }, 292 }, 293 { 294 "testdata/go-relocation-test-clang-x86.obj", 295 []relocationTestEntry{ 296 {0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "clang version google3-trunk (trunk r209387)", Class: dwarf.ClassString}, {Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrName, Val: "go-relocation-test-clang.c", Class: dwarf.ClassString}, {Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr}, {Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString}}}}, 297 }, 298 }, 299 { 300 "testdata/gcc-amd64-openbsd-debug-with-rela.obj", 301 []relocationTestEntry{ 302 {203, &dwarf.Entry{Offset: 0xc62, Tag: dwarf.TagMember, Children: false, Field: []dwarf.Field{{Attr: dwarf.AttrName, Val: "it_interval", Class: dwarf.ClassString}, {Attr: dwarf.AttrDeclFile, Val: int64(7), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrDeclLine, Val: int64(236), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrType, Val: dwarf.Offset(0xb7f), Class: dwarf.ClassReference}, {Attr: dwarf.AttrDataMemberLoc, Val: []byte{0x23, 0x0}, Class: dwarf.ClassExprLoc}}}}, 303 {204, &dwarf.Entry{Offset: 0xc70, Tag: dwarf.TagMember, Children: false, Field: []dwarf.Field{{Attr: dwarf.AttrName, Val: "it_value", Class: dwarf.ClassString}, {Attr: dwarf.AttrDeclFile, Val: int64(7), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrDeclLine, Val: int64(237), Class: dwarf.ClassConstant}, {Attr: dwarf.AttrType, Val: dwarf.Offset(0xb7f), Class: dwarf.ClassReference}, {Attr: dwarf.AttrDataMemberLoc, Val: []byte{0x23, 0x10}, Class: dwarf.ClassExprLoc}}}}, 304 }, 305 }, 306 } 307 308 func TestDWARFRelocations(t *testing.T) { 309 for i, test := range relocationTests { 310 f, err := Open(test.file) 311 if err != nil { 312 t.Error(err) 313 continue 314 } 315 dwarf, err := f.DWARF() 316 if err != nil { 317 t.Error(err) 318 continue 319 } 320 for _, testEntry := range test.entries { 321 reader := dwarf.Reader() 322 for j := 0; j < testEntry.entryNumber; j++ { 323 entry, err := reader.Next() 324 if entry == nil || err != nil { 325 t.Errorf("Failed to skip to entry %d: %v", testEntry.entryNumber, err) 326 continue 327 } 328 } 329 entry, err := reader.Next() 330 if err != nil { 331 t.Error(err) 332 continue 333 } 334 if !reflect.DeepEqual(testEntry.entry, entry) { 335 t.Errorf("#%d/%d: mismatch: got:%#v want:%#v", i, testEntry.entryNumber, entry, testEntry.entry) 336 continue 337 } 338 } 339 } 340 } 341 342 func TestNoSectionOverlaps(t *testing.T) { 343 // Ensure 6l outputs sections without overlaps. 344 if runtime.GOOS != "linux" && runtime.GOOS != "freebsd" { 345 return // not ELF 346 } 347 _ = net.ResolveIPAddr // force dynamic linkage 348 f, err := Open(os.Args[0]) 349 if err != nil { 350 t.Error(err) 351 return 352 } 353 for i, si := range f.Sections { 354 sih := si.SectionHeader 355 if sih.Type == SHT_NOBITS { 356 continue 357 } 358 for j, sj := range f.Sections { 359 sjh := sj.SectionHeader 360 if i == j || sjh.Type == SHT_NOBITS || sih.Offset == sjh.Offset && sih.Size == 0 { 361 continue 362 } 363 if sih.Offset >= sjh.Offset && sih.Offset < sjh.Offset+sjh.Size { 364 t.Errorf("ld produced ELF with section %s within %s: 0x%x <= 0x%x..0x%x < 0x%x", 365 sih.Name, sjh.Name, sjh.Offset, sih.Offset, sih.Offset+sih.Size, sjh.Offset+sjh.Size) 366 } 367 } 368 } 369 } 370
