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 // Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package elf
import (
"bytes"
"compress/gzip"
"compress/zlib"
"debug/dwarf"
"encoding/binary"
"errors"
"fmt"
"io"
"math/rand"
"net"
"os"
"path"
"reflect"
"runtime"
"slices"
"strings"
"testing"
)
type fileTest struct {
file string
hdr FileHeader
sections []SectionHeader
progs []ProgHeader
needed []string
symbols []Symbol
}
var fileTests = []fileTest{
{
"testdata/gcc-386-freebsd-exec",
FileHeader{ELFCLASS32, ELFDATA2LSB, EV_CURRENT, ELFOSABI_FREEBSD, 0, binary.LittleEndian, ET_EXEC, EM_386, 0x80483cc},
[]SectionHeader{
{"", SHT_NULL, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
{".interp", SHT_PROGBITS, SHF_ALLOC, 0x80480d4, 0xd4, 0x15, 0x0, 0x0, 0x1, 0x0, 0x15},
{".hash", SHT_HASH, SHF_ALLOC, 0x80480ec, 0xec, 0x90, 0x3, 0x0, 0x4, 0x4, 0x90},
{".dynsym", SHT_DYNSYM, SHF_ALLOC, 0x804817c, 0x17c, 0x110, 0x4, 0x1, 0x4, 0x10, 0x110},
{".dynstr", SHT_STRTAB, SHF_ALLOC, 0x804828c, 0x28c, 0xbb, 0x0, 0x0, 0x1, 0x0, 0xbb},
{".rel.plt", SHT_REL, SHF_ALLOC, 0x8048348, 0x348, 0x20, 0x3, 0x7, 0x4, 0x8, 0x20},
{".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x8048368, 0x368, 0x11, 0x0, 0x0, 0x4, 0x0, 0x11},
{".plt", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x804837c, 0x37c, 0x50, 0x0, 0x0, 0x4, 0x4, 0x50},
{".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x80483cc, 0x3cc, 0x180, 0x0, 0x0, 0x4, 0x0, 0x180},
{".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x804854c, 0x54c, 0xc, 0x0, 0x0, 0x4, 0x0, 0xc},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x8048558, 0x558, 0xa3, 0x0, 0x0, 0x1, 0x0, 0xa3},
{".data", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80495fc, 0x5fc, 0xc, 0x0, 0x0, 0x4, 0x0, 0xc},
{".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x8049608, 0x608, 0x4, 0x0, 0x0, 0x4, 0x0, 0x4},
{".dynamic", SHT_DYNAMIC, SHF_WRITE + SHF_ALLOC, 0x804960c, 0x60c, 0x98, 0x4, 0x0, 0x4, 0x8, 0x98},
{".ctors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496a4, 0x6a4, 0x8, 0x0, 0x0, 0x4, 0x0, 0x8},
{".dtors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496ac, 0x6ac, 0x8, 0x0, 0x0, 0x4, 0x0, 0x8},
{".jcr", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496b4, 0x6b4, 0x4, 0x0, 0x0, 0x4, 0x0, 0x4},
{".got", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x80496b8, 0x6b8, 0x1c, 0x0, 0x0, 0x4, 0x4, 0x1c},
{".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x80496d4, 0x6d4, 0x20, 0x0, 0x0, 0x4, 0x0, 0x20},
{".comment", SHT_PROGBITS, 0x0, 0x0, 0x6d4, 0x12d, 0x0, 0x0, 0x1, 0x0, 0x12d},
{".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x801, 0x20, 0x0, 0x0, 0x1, 0x0, 0x20},
{".debug_pubnames", SHT_PROGBITS, 0x0, 0x0, 0x821, 0x1b, 0x0, 0x0, 0x1, 0x0, 0x1b},
{".debug_info", SHT_PROGBITS, 0x0, 0x0, 0x83c, 0x11d, 0x0, 0x0, 0x1, 0x0, 0x11d},
{".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0x959, 0x41, 0x0, 0x0, 0x1, 0x0, 0x41},
{".debug_line", SHT_PROGBITS, 0x0, 0x0, 0x99a, 0x35, 0x0, 0x0, 0x1, 0x0, 0x35},
{".debug_frame", SHT_PROGBITS, 0x0, 0x0, 0x9d0, 0x30, 0x0, 0x0, 0x4, 0x0, 0x30},
{".debug_str", SHT_PROGBITS, 0x0, 0x0, 0xa00, 0xd, 0x0, 0x0, 0x1, 0x0, 0xd},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0xa0d, 0xf8, 0x0, 0x0, 0x1, 0x0, 0xf8},
{".symtab", SHT_SYMTAB, 0x0, 0x0, 0xfb8, 0x4b0, 0x1d, 0x38, 0x4, 0x10, 0x4b0},
{".strtab", SHT_STRTAB, 0x0, 0x0, 0x1468, 0x206, 0x0, 0x0, 0x1, 0x0, 0x206},
},
[]ProgHeader{
{PT_PHDR, PF_R + PF_X, 0x34, 0x8048034, 0x8048034, 0xa0, 0xa0, 0x4},
{PT_INTERP, PF_R, 0xd4, 0x80480d4, 0x80480d4, 0x15, 0x15, 0x1},
{PT_LOAD, PF_R + PF_X, 0x0, 0x8048000, 0x8048000, 0x5fb, 0x5fb, 0x1000},
{PT_LOAD, PF_R + PF_W, 0x5fc, 0x80495fc, 0x80495fc, 0xd8, 0xf8, 0x1000},
{PT_DYNAMIC, PF_R + PF_W, 0x60c, 0x804960c, 0x804960c, 0x98, 0x98, 0x4},
},
[]string{"libc.so.6"},
[]Symbol{
{"", 3, 0, false, 0, 1, 134512852, 0, "", ""},
{"", 3, 0, false, 0, 2, 134512876, 0, "", ""},
{"", 3, 0, false, 0, 3, 134513020, 0, "", ""},
{"", 3, 0, false, 0, 4, 134513292, 0, "", ""},
{"", 3, 0, false, 0, 5, 134513480, 0, "", ""},
{"", 3, 0, false, 0, 6, 134513512, 0, "", ""},
{"", 3, 0, false, 0, 7, 134513532, 0, "", ""},
{"", 3, 0, false, 0, 8, 134513612, 0, "", ""},
{"", 3, 0, false, 0, 9, 134513996, 0, "", ""},
{"", 3, 0, false, 0, 10, 134514008, 0, "", ""},
{"", 3, 0, false, 0, 11, 134518268, 0, "", ""},
{"", 3, 0, false, 0, 12, 134518280, 0, "", ""},
{"", 3, 0, false, 0, 13, 134518284, 0, "", ""},
{"", 3, 0, false, 0, 14, 134518436, 0, "", ""},
{"", 3, 0, false, 0, 15, 134518444, 0, "", ""},
{"", 3, 0, false, 0, 16, 134518452, 0, "", ""},
{"", 3, 0, false, 0, 17, 134518456, 0, "", ""},
{"", 3, 0, false, 0, 18, 134518484, 0, "", ""},
{"", 3, 0, false, 0, 19, 0, 0, "", ""},
{"", 3, 0, false, 0, 20, 0, 0, "", ""},
{"", 3, 0, false, 0, 21, 0, 0, "", ""},
{"", 3, 0, false, 0, 22, 0, 0, "", ""},
{"", 3, 0, false, 0, 23, 0, 0, "", ""},
{"", 3, 0, false, 0, 24, 0, 0, "", ""},
{"", 3, 0, false, 0, 25, 0, 0, "", ""},
{"", 3, 0, false, 0, 26, 0, 0, "", ""},
{"", 3, 0, false, 0, 27, 0, 0, "", ""},
{"", 3, 0, false, 0, 28, 0, 0, "", ""},
{"", 3, 0, false, 0, 29, 0, 0, "", ""},
{"crt1.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"<command line>", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"<built-in>", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"crtstuff.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"__CTOR_LIST__", 1, 0, false, 0, 14, 134518436, 0, "", ""},
{"__DTOR_LIST__", 1, 0, false, 0, 15, 134518444, 0, "", ""},
{"__EH_FRAME_BEGIN__", 1, 0, false, 0, 12, 134518280, 0, "", ""},
{"__JCR_LIST__", 1, 0, false, 0, 16, 134518452, 0, "", ""},
{"p.0", 1, 0, false, 0, 11, 134518276, 0, "", ""},
{"completed.1", 1, 0, false, 0, 18, 134518484, 1, "", ""},
{"__do_global_dtors_aux", 2, 0, false, 0, 8, 134513760, 0, "", ""},
{"object.2", 1, 0, false, 0, 18, 134518488, 24, "", ""},
{"frame_dummy", 2, 0, false, 0, 8, 134513836, 0, "", ""},
{"crtstuff.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"__CTOR_END__", 1, 0, false, 0, 14, 134518440, 0, "", ""},
{"__DTOR_END__", 1, 0, false, 0, 15, 134518448, 0, "", ""},
{"__FRAME_END__", 1, 0, false, 0, 12, 134518280, 0, "", ""},
{"__JCR_END__", 1, 0, false, 0, 16, 134518452, 0, "", ""},
{"__do_global_ctors_aux", 2, 0, false, 0, 8, 134513960, 0, "", ""},
{"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"<command line>", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"<built-in>", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"hello.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"printf", 18, 0, false, 0, 0, 0, 44, "", ""},
{"_DYNAMIC", 17, 0, false, 0, 65521, 134518284, 0, "", ""},
{"__dso_handle", 17, 2, false, 0, 11, 134518272, 0, "", ""},
{"_init", 18, 0, false, 0, 6, 134513512, 0, "", ""},
{"environ", 17, 0, false, 0, 18, 134518512, 4, "", ""},
{"__deregister_frame_info", 32, 0, false, 0, 0, 0, 0, "", ""},
{"__progname", 17, 0, false, 0, 11, 134518268, 4, "", ""},
{"_start", 18, 0, false, 0, 8, 134513612, 145, "", ""},
{"__bss_start", 16, 0, false, 0, 65521, 134518484, 0, "", ""},
{"main", 18, 0, false, 0, 8, 134513912, 46, "", ""},
{"_init_tls", 18, 0, false, 0, 0, 0, 5, "", ""},
{"_fini", 18, 0, false, 0, 9, 134513996, 0, "", ""},
{"atexit", 18, 0, false, 0, 0, 0, 43, "", ""},
{"_edata", 16, 0, false, 0, 65521, 134518484, 0, "", ""},
{"_GLOBAL_OFFSET_TABLE_", 17, 0, false, 0, 65521, 134518456, 0, "", ""},
{"_end", 16, 0, false, 0, 65521, 134518516, 0, "", ""},
{"exit", 18, 0, false, 0, 0, 0, 68, "", ""},
{"_Jv_RegisterClasses", 32, 0, false, 0, 0, 0, 0, "", ""},
{"__register_frame_info", 32, 0, false, 0, 0, 0, 0, "", ""},
},
},
{
"testdata/gcc-amd64-linux-exec",
FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0, binary.LittleEndian, ET_EXEC, EM_X86_64, 0x4003e0},
[]SectionHeader{
{"", SHT_NULL, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
{".interp", SHT_PROGBITS, SHF_ALLOC, 0x400200, 0x200, 0x1c, 0x0, 0x0, 0x1, 0x0, 0x1c},
{".note.ABI-tag", SHT_NOTE, SHF_ALLOC, 0x40021c, 0x21c, 0x20, 0x0, 0x0, 0x4, 0x0, 0x20},
{".hash", SHT_HASH, SHF_ALLOC, 0x400240, 0x240, 0x24, 0x5, 0x0, 0x8, 0x4, 0x24},
{".gnu.hash", SHT_LOOS + 268435446, SHF_ALLOC, 0x400268, 0x268, 0x1c, 0x5, 0x0, 0x8, 0x0, 0x1c},
{".dynsym", SHT_DYNSYM, SHF_ALLOC, 0x400288, 0x288, 0x60, 0x6, 0x1, 0x8, 0x18, 0x60},
{".dynstr", SHT_STRTAB, SHF_ALLOC, 0x4002e8, 0x2e8, 0x3d, 0x0, 0x0, 0x1, 0x0, 0x3d},
{".gnu.version", SHT_HIOS, SHF_ALLOC, 0x400326, 0x326, 0x8, 0x5, 0x0, 0x2, 0x2, 0x8},
{".gnu.version_r", SHT_LOOS + 268435454, SHF_ALLOC, 0x400330, 0x330, 0x20, 0x6, 0x1, 0x8, 0x0, 0x20},
{".rela.dyn", SHT_RELA, SHF_ALLOC, 0x400350, 0x350, 0x18, 0x5, 0x0, 0x8, 0x18, 0x18},
{".rela.plt", SHT_RELA, SHF_ALLOC, 0x400368, 0x368, 0x30, 0x5, 0xc, 0x8, 0x18, 0x30},
{".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x400398, 0x398, 0x18, 0x0, 0x0, 0x4, 0x0, 0x18},
{".plt", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x4003b0, 0x3b0, 0x30, 0x0, 0x0, 0x4, 0x10, 0x30},
{".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x4003e0, 0x3e0, 0x1b4, 0x0, 0x0, 0x10, 0x0, 0x1b4},
{".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x400594, 0x594, 0xe, 0x0, 0x0, 0x4, 0x0, 0xe},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x4005a4, 0x5a4, 0x11, 0x0, 0x0, 0x4, 0x0, 0x11},
{".eh_frame_hdr", SHT_PROGBITS, SHF_ALLOC, 0x4005b8, 0x5b8, 0x24, 0x0, 0x0, 0x4, 0x0, 0x24},
{".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x4005e0, 0x5e0, 0xa4, 0x0, 0x0, 0x8, 0x0, 0xa4},
{".ctors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600688, 0x688, 0x10, 0x0, 0x0, 0x8, 0x0, 0x10},
{".dtors", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600698, 0x698, 0x10, 0x0, 0x0, 0x8, 0x0, 0x10},
{".jcr", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x6006a8, 0x6a8, 0x8, 0x0, 0x0, 0x8, 0x0, 0x8},
{".dynamic", SHT_DYNAMIC, SHF_WRITE + SHF_ALLOC, 0x6006b0, 0x6b0, 0x1a0, 0x6, 0x0, 0x8, 0x10, 0x1a0},
{".got", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600850, 0x850, 0x8, 0x0, 0x0, 0x8, 0x8, 0x8},
{".got.plt", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600858, 0x858, 0x28, 0x0, 0x0, 0x8, 0x8, 0x28},
{".data", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x600880, 0x880, 0x18, 0x0, 0x0, 0x8, 0x0, 0x18},
{".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x600898, 0x898, 0x8, 0x0, 0x0, 0x4, 0x0, 0x8},
{".comment", SHT_PROGBITS, 0x0, 0x0, 0x898, 0x126, 0x0, 0x0, 0x1, 0x0, 0x126},
{".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x9c0, 0x90, 0x0, 0x0, 0x10, 0x0, 0x90},
{".debug_pubnames", SHT_PROGBITS, 0x0, 0x0, 0xa50, 0x25, 0x0, 0x0, 0x1, 0x0, 0x25},
{".debug_info", SHT_PROGBITS, 0x0, 0x0, 0xa75, 0x1a7, 0x0, 0x0, 0x1, 0x0, 0x1a7},
{".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0xc1c, 0x6f, 0x0, 0x0, 0x1, 0x0, 0x6f},
{".debug_line", SHT_PROGBITS, 0x0, 0x0, 0xc8b, 0x13f, 0x0, 0x0, 0x1, 0x0, 0x13f},
{".debug_str", SHT_PROGBITS, SHF_MERGE + SHF_STRINGS, 0x0, 0xdca, 0xb1, 0x0, 0x0, 0x1, 0x1, 0xb1},
{".debug_ranges", SHT_PROGBITS, 0x0, 0x0, 0xe80, 0x90, 0x0, 0x0, 0x10, 0x0, 0x90},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0xf10, 0x149, 0x0, 0x0, 0x1, 0x0, 0x149},
{".symtab", SHT_SYMTAB, 0x0, 0x0, 0x19a0, 0x6f0, 0x24, 0x39, 0x8, 0x18, 0x6f0},
{".strtab", SHT_STRTAB, 0x0, 0x0, 0x2090, 0x1fc, 0x0, 0x0, 0x1, 0x0, 0x1fc},
},
[]ProgHeader{
{PT_PHDR, PF_R + PF_X, 0x40, 0x400040, 0x400040, 0x1c0, 0x1c0, 0x8},
{PT_INTERP, PF_R, 0x200, 0x400200, 0x400200, 0x1c, 0x1c, 1},
{PT_LOAD, PF_R + PF_X, 0x0, 0x400000, 0x400000, 0x684, 0x684, 0x200000},
{PT_LOAD, PF_R + PF_W, 0x688, 0x600688, 0x600688, 0x210, 0x218, 0x200000},
{PT_DYNAMIC, PF_R + PF_W, 0x6b0, 0x6006b0, 0x6006b0, 0x1a0, 0x1a0, 0x8},
{PT_NOTE, PF_R, 0x21c, 0x40021c, 0x40021c, 0x20, 0x20, 0x4},
{PT_LOOS + 0x474E550, PF_R, 0x5b8, 0x4005b8, 0x4005b8, 0x24, 0x24, 0x4},
{PT_LOOS + 0x474E551, PF_R + PF_W, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8},
},
[]string{"libc.so.6"},
[]Symbol{
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{"crtstuff.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
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{"__DTOR_LIST__", 1, 0, false, 0, 19, 6293144, 0, "", ""},
{"__JCR_LIST__", 1, 0, false, 0, 20, 6293160, 0, "", ""},
{"__do_global_dtors_aux", 2, 0, false, 0, 13, 4195376, 0, "", ""},
{"completed.6183", 1, 0, false, 0, 25, 6293656, 1, "", ""},
{"p.6181", 1, 0, false, 0, 24, 6293648, 0, "", ""},
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{"crtstuff.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"__CTOR_END__", 1, 0, false, 0, 18, 6293136, 0, "", ""},
{"__DTOR_END__", 1, 0, false, 0, 19, 6293152, 0, "", ""},
{"__FRAME_END__", 1, 0, false, 0, 17, 4195968, 0, "", ""},
{"__JCR_END__", 1, 0, false, 0, 20, 6293160, 0, "", ""},
{"__do_global_ctors_aux", 2, 0, false, 0, 13, 4195680, 0, "", ""},
{"initfini.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"hello.c", 4, 0, false, 0, 65521, 0, 0, "", ""},
{"_GLOBAL_OFFSET_TABLE_", 1, 2, false, 0, 23, 6293592, 0, "", ""},
{"__init_array_end", 0, 2, false, 0, 18, 6293124, 0, "", ""},
{"__init_array_start", 0, 2, false, 0, 18, 6293124, 0, "", ""},
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{"data_start", 32, 0, false, 0, 24, 6293632, 0, "", ""},
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FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0x0, binary.LittleEndian, ET_CORE, EM_X86_64, 0x0},
[]SectionHeader{},
[]ProgHeader{
{Type: PT_NOTE, Flags: 0x0, Off: 0x3f8, Vaddr: 0x0, Paddr: 0x0, Filesz: 0x8ac, Memsz: 0x0, Align: 0x0},
{Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x1000, Vaddr: 0x400000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_R, Off: 0x1000, Vaddr: 0x401000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x2000, Vaddr: 0x402000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3000, Vaddr: 0x7f54078b8000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1b5000, Align: 0x1000},
{Type: PT_LOAD, Flags: 0x0, Off: 0x3000, Vaddr: 0x7f5407a6d000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x1ff000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_R, Off: 0x3000, Vaddr: 0x7f5407c6c000, Paddr: 0x0, Filesz: 0x4000, Memsz: 0x4000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x7000, Vaddr: 0x7f5407c70000, Paddr: 0x0, Filesz: 0x2000, Memsz: 0x2000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x9000, Vaddr: 0x7f5407c72000, Paddr: 0x0, Filesz: 0x5000, Memsz: 0x5000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0xe000, Vaddr: 0x7f5407c77000, Paddr: 0x0, Filesz: 0x0, Memsz: 0x22000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0xe000, Vaddr: 0x7f5407e81000, Paddr: 0x0, Filesz: 0x3000, Memsz: 0x3000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x11000, Vaddr: 0x7f5407e96000, Paddr: 0x0, Filesz: 0x3000, Memsz: 0x3000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_R, Off: 0x14000, Vaddr: 0x7f5407e99000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x15000, Vaddr: 0x7f5407e9a000, Paddr: 0x0, Filesz: 0x2000, Memsz: 0x2000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_W + PF_R, Off: 0x17000, Vaddr: 0x7fff79972000, Paddr: 0x0, Filesz: 0x23000, Memsz: 0x23000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3a000, Vaddr: 0x7fff799f8000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000},
{Type: PT_LOAD, Flags: PF_X + PF_R, Off: 0x3b000, Vaddr: 0xffffffffff600000, Paddr: 0x0, Filesz: 0x1000, Memsz: 0x1000, Align: 0x1000},
},
nil,
nil,
},
{
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[]SectionHeader{
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{".rel.text", SHT_REL, SHF_INFO_LINK, 0x0, 0x3dc, 0x10, 0x13, 0x1, 0x4, 0x8, 0x10},
{".data", SHT_PROGBITS, SHF_WRITE | SHF_ALLOC, 0x0, 0x4b, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".bss", SHT_NOBITS, SHF_WRITE | SHF_ALLOC, 0x0, 0x4b, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x0, 0x4b, 0xd, 0x0, 0x0, 0x1, 0x0, 0xd},
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{".rel.debug_info", SHT_REL, SHF_INFO_LINK, 0x0, 0x3ec, 0xa0, 0x13, 0x6, 0x4, 0x8, 0xa0},
{".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0xdc, 0x5a, 0x0, 0x0, 0x1, 0x0, 0x5a},
{".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x136, 0x20, 0x0, 0x0, 0x1, 0x0, 0x20},
{".rel.debug_aranges", SHT_REL, SHF_INFO_LINK, 0x0, 0x48c, 0x10, 0x13, 0x9, 0x4, 0x8, 0x10},
{".debug_line", SHT_PROGBITS, 0x0, 0x0, 0x156, 0x5c, 0x0, 0x0, 0x1, 0x0, 0x5c},
{".rel.debug_line", SHT_REL, SHF_INFO_LINK, 0x0, 0x49c, 0x8, 0x13, 0xb, 0x4, 0x8, 0x8},
{".debug_str", SHT_PROGBITS, SHF_MERGE | SHF_STRINGS | SHF_COMPRESSED, 0x0, 0x1b2, 0x10f, 0x0, 0x0, 0x1, 0x1, 0xb3},
{".comment", SHT_PROGBITS, SHF_MERGE | SHF_STRINGS, 0x0, 0x265, 0x2a, 0x0, 0x0, 0x1, 0x1, 0x2a},
{".note.GNU-stack", SHT_PROGBITS, 0x0, 0x0, 0x28f, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x0, 0x290, 0x38, 0x0, 0x0, 0x4, 0x0, 0x38},
{".rel.eh_frame", SHT_REL, SHF_INFO_LINK, 0x0, 0x4a4, 0x8, 0x13, 0x10, 0x4, 0x8, 0x8},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0x4ac, 0xab, 0x0, 0x0, 0x1, 0x0, 0xab},
{".symtab", SHT_SYMTAB, 0x0, 0x0, 0x2c8, 0x100, 0x14, 0xe, 0x4, 0x10, 0x100},
{".strtab", SHT_STRTAB, 0x0, 0x0, 0x3c8, 0x13, 0x0, 0x0, 0x1, 0x0, 0x13},
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[]ProgHeader{},
nil,
[]Symbol{
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FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0x0, binary.LittleEndian, ET_REL, EM_X86_64, 0x0},
[]SectionHeader{
{"", SHT_NULL, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
{".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR, 0x0, 0x40, 0x1b, 0x0, 0x0, 0x1, 0x0, 0x1b},
{".rela.text", SHT_RELA, SHF_INFO_LINK, 0x0, 0x488, 0x30, 0x13, 0x1, 0x8, 0x18, 0x30},
{".data", SHT_PROGBITS, SHF_WRITE | SHF_ALLOC, 0x0, 0x5b, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".bss", SHT_NOBITS, SHF_WRITE | SHF_ALLOC, 0x0, 0x5b, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x0, 0x5b, 0xd, 0x0, 0x0, 0x1, 0x0, 0xd},
{".debug_info", SHT_PROGBITS, SHF_COMPRESSED, 0x0, 0x68, 0xba, 0x0, 0x0, 0x1, 0x0, 0x72},
{".rela.debug_info", SHT_RELA, SHF_INFO_LINK, 0x0, 0x4b8, 0x1c8, 0x13, 0x6, 0x8, 0x18, 0x1c8},
{".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0xda, 0x5c, 0x0, 0x0, 0x1, 0x0, 0x5c},
{".debug_aranges", SHT_PROGBITS, SHF_COMPRESSED, 0x0, 0x136, 0x30, 0x0, 0x0, 0x1, 0x0, 0x2f},
{".rela.debug_aranges", SHT_RELA, SHF_INFO_LINK, 0x0, 0x680, 0x30, 0x13, 0x9, 0x8, 0x18, 0x30},
{".debug_line", SHT_PROGBITS, 0x0, 0x0, 0x165, 0x60, 0x0, 0x0, 0x1, 0x0, 0x60},
{".rela.debug_line", SHT_RELA, SHF_INFO_LINK, 0x0, 0x6b0, 0x18, 0x13, 0xb, 0x8, 0x18, 0x18},
{".debug_str", SHT_PROGBITS, SHF_MERGE | SHF_STRINGS | SHF_COMPRESSED, 0x0, 0x1c5, 0x104, 0x0, 0x0, 0x1, 0x1, 0xc3},
{".comment", SHT_PROGBITS, SHF_MERGE | SHF_STRINGS, 0x0, 0x288, 0x2a, 0x0, 0x0, 0x1, 0x1, 0x2a},
{".note.GNU-stack", SHT_PROGBITS, 0x0, 0x0, 0x2b2, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x0, 0x2b8, 0x38, 0x0, 0x0, 0x8, 0x0, 0x38},
{".rela.eh_frame", SHT_RELA, SHF_INFO_LINK, 0x0, 0x6c8, 0x18, 0x13, 0x10, 0x8, 0x18, 0x18},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0x6e0, 0xb0, 0x0, 0x0, 0x1, 0x0, 0xb0},
{".symtab", SHT_SYMTAB, 0x0, 0x0, 0x2f0, 0x180, 0x14, 0xe, 0x8, 0x18, 0x180},
{".strtab", SHT_STRTAB, 0x0, 0x0, 0x470, 0x13, 0x0, 0x0, 0x1, 0x0, 0x13},
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[]SectionHeader{
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{".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x0, 0x40, 0x2c, 0x0, 0x0, 0x4, 0x0, 0x2c},
{".rela.text", SHT_RELA, SHF_INFO_LINK, 0x0, 0xa58, 0x48, 0x13, 0x1, 0x8, 0x18, 0x48},
{".data", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x0, 0x6c, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x0, 0x6c, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x0, 0x70, 0xd, 0x0, 0x0, 0x8, 0x0, 0xd},
{".debug_info", SHT_PROGBITS, 0x0, 0x0, 0x7d, 0x346, 0x0, 0x0, 0x1, 0x0, 0x346},
{".rela.debug_info", SHT_RELA, SHF_INFO_LINK, 0x0, 0xaa0, 0x630, 0x13, 0x6, 0x8, 0x18, 0x630},
{".debug_abbrev", SHT_PROGBITS, 0x0, 0x0, 0x3c3, 0xf1, 0x0, 0x0, 0x1, 0x0, 0xf1},
{".debug_aranges", SHT_PROGBITS, 0x0, 0x0, 0x4b4, 0x30, 0x0, 0x0, 0x1, 0x0, 0x30},
{".rela.debug_aranges", SHT_RELA, SHF_INFO_LINK, 0x0, 0x10d0, 0x30, 0x13, 0x9, 0x8, 0x18, 0x30},
{".debug_line", SHT_PROGBITS, 0x0, 0x0, 0x4e4, 0xd3, 0x0, 0x0, 0x1, 0x0, 0xd3},
{".rela.debug_line", SHT_RELA, SHF_INFO_LINK, 0x0, 0x1100, 0x18, 0x13, 0xb, 0x8, 0x18, 0x18},
{".debug_str", SHT_PROGBITS, SHF_MERGE + SHF_STRINGS, 0x0, 0x5b7, 0x2a3, 0x0, 0x0, 0x1, 0x1, 0x2a3},
{".comment", SHT_PROGBITS, SHF_MERGE + SHF_STRINGS, 0x0, 0x85a, 0x2e, 0x0, 0x0, 0x1, 0x1, 0x2e},
{".note.GNU-stack", SHT_PROGBITS, 0x0, 0x0, 0x888, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0},
{".debug_frame", SHT_PROGBITS, 0x0, 0x0, 0x888, 0x38, 0x0, 0x0, 0x8, 0x0, 0x38},
{".rela.debug_frame", SHT_RELA, SHF_INFO_LINK, 0x0, 0x1118, 0x30, 0x13, 0x10, 0x8, 0x18, 0x30},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0x1148, 0xb3, 0x0, 0x0, 0x1, 0x0, 0xb3},
{".symtab", SHT_SYMTAB, 0x0, 0x0, 0x8c0, 0x180, 0x14, 0xe, 0x8, 0x18, 0x180},
{".strtab", SHT_STRTAB, 0x0, 0x0, 0xa40, 0x13, 0x0, 0x0, 0x1, 0x0, 0x13},
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[]Symbol{
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FileHeader{ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_NONE, 0, binary.LittleEndian, ET_EXEC, EM_RISCV, 0x10460},
[]SectionHeader{
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{".interp", SHT_PROGBITS, SHF_ALLOC, 0x10270, 0x270, 0x21, 0x0, 0x0, 0x1, 0x0, 0x21},
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{".note.ABI-tag", SHT_NOTE, SHF_ALLOC, 0x102b8, 0x2b8, 0x20, 0x0, 0x0, 0x4, 0x0, 0x20},
{".gnu.hash", SHT_GNU_HASH, SHF_ALLOC, 0x102d8, 0x2d8, 0x30, 0x5, 0x0, 0x8, 0x0, 0x30},
{".dynsym", SHT_DYNSYM, SHF_ALLOC, 0x10308, 0x308, 0x60, 0x6, 0x1, 0x8, 0x18, 0x60},
{".dynstr", SHT_STRTAB, SHF_ALLOC, 0x10368, 0x368, 0x4a, 0x0, 0x0, 0x1, 0x0, 0x4a},
{".gnu.version", SHT_GNU_VERSYM, SHF_ALLOC, 0x103b2, 0x3b2, 0x8, 0x5, 0x0, 0x2, 0x2, 0x8},
{".gnu.version_r", SHT_GNU_VERNEED, SHF_ALLOC, 0x103c0, 0x3c0, 0x30, 0x6, 0x1, 0x8, 0x0, 0x30},
{".rela.plt", SHT_RELA, SHF_ALLOC + SHF_INFO_LINK, 0x103f0, 0x3f0, 0x30, 0x5, 0x14, 0x8, 0x18, 0x30},
{".plt", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x10420, 0x420, 0x40, 0x0, 0x0, 0x10, 0x10, 0x40},
{".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR, 0x10460, 0x460, 0xd8, 0x0, 0x0, 0x4, 0x0, 0xd8},
{".rodata", SHT_PROGBITS, SHF_ALLOC, 0x10538, 0x538, 0x15, 0x0, 0x0, 0x8, 0x0, 0x15},
{".eh_frame_hdr", SHT_PROGBITS, SHF_ALLOC, 0x10550, 0x550, 0x24, 0x0, 0x0, 0x4, 0x0, 0x24},
{".eh_frame", SHT_PROGBITS, SHF_ALLOC, 0x10578, 0x578, 0x6c, 0x0, 0x0, 0x8, 0x0, 0x6c},
{".preinit_array", SHT_PREINIT_ARRAY, SHF_WRITE + SHF_ALLOC, 0x11e00, 0xe00, 0x8, 0x0, 0x0, 0x1, 0x8, 0x8},
{".init_array", SHT_INIT_ARRAY, SHF_WRITE + SHF_ALLOC, 0x11e08, 0xe08, 0x8, 0x0, 0x0, 0x8, 0x8, 0x8},
{".fini_array", SHT_FINI_ARRAY, SHF_WRITE + SHF_ALLOC, 0x11e10, 0xe10, 0x8, 0x0, 0x0, 0x8, 0x8, 0x8},
{".dynamic", SHT_DYNAMIC, SHF_WRITE + SHF_ALLOC, 0x11e18, 0xe18, 0x1d0, 0x6, 0x0, 0x8, 0x10, 0x1d0},
{".got", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x11fe8, 0xfe8, 0x8, 0x0, 0x0, 0x8, 0x8, 0x8},
{".got.plt", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x11ff0, 0xff0, 0x20, 0x0, 0x0, 0x8, 0x8, 0x20},
{".sdata", SHT_PROGBITS, SHF_WRITE + SHF_ALLOC, 0x12010, 0x1010, 0x8, 0x0, 0x0, 0x8, 0x0, 0x8},
{".bss", SHT_NOBITS, SHF_WRITE + SHF_ALLOC, 0x12018, 0x1018, 0x8, 0x0, 0x0, 0x1, 0x0, 0x8},
{".comment", SHT_PROGBITS, SHF_MERGE + SHF_STRINGS, 0x0, 0x1018, 0x26, 0x0, 0x0, 0x1, 0x1, 0x26},
{".riscv.attributes", SHT_RISCV_ATTRIBUTES, 0x0, 0x0, 0x103e, 0x66, 0x0, 0x0, 0x1, 0x0, 0x66},
{".shstrtab", SHT_STRTAB, 0x0, 0x0, 0x10a4, 0xff, 0x0, 0x0, 0x1, 0x0, 0xff},
},
[]ProgHeader{
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{PT_INTERP, PF_R, 0x270, 0x10270, 0x10270, 0x21, 0x21, 0x1},
{PT_RISCV_ATTRIBUTES, PF_R, 0x103e, 0x0, 0x0, 0x66, 0x0, 0x1},
{PT_LOAD, PF_X + PF_R, 0x0, 0x10000, 0x10000, 0x5e4, 0x5e4, 0x1000},
{PT_LOAD, PF_W + PF_R, 0xe00, 0x11e00, 0x11e00, 0x218, 0x220, 0x1000},
{PT_DYNAMIC, PF_W + PF_R, 0xe18, 0x11e18, 0x11e18, 0x1d0, 0x1d0, 0x8},
{PT_NOTE, PF_R, 0x294, 0x10294, 0x10294, 0x44, 0x44, 0x4},
{PT_GNU_EH_FRAME, PF_R, 0x550, 0x10550, 0x10550, 0x24, 0x24, 0x4},
{PT_GNU_STACK, PF_W + PF_R, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10},
{PT_GNU_RELRO, PF_R, 0xe00, 0x11e00, 0x11e00, 0x200, 0x200, 0x1},
},
[]string{"libc.so.6"},
nil,
},
}
func TestOpen(t *testing.T) {
for i := range fileTests {
tt := &fileTests[i]
var f *File
var err error
if path.Ext(tt.file) == ".gz" {
var r io.ReaderAt
if r, err = decompress(tt.file); err == nil {
f, err = NewFile(r)
}
} else {
f, err = Open(tt.file)
}
if err != nil {
t.Errorf("cannot open file %s: %v", tt.file, err)
continue
}
defer f.Close()
if f.FileHeader != tt.hdr {
t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr)
continue
}
for i, s := range f.Sections {
if i >= len(tt.sections) {
break
}
sh := tt.sections[i]
if s.SectionHeader != sh {
t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, s.SectionHeader, sh)
}
}
for i, p := range f.Progs {
if i >= len(tt.progs) {
break
}
ph := tt.progs[i]
if p.ProgHeader != ph {
t.Errorf("open %s, program %d:\n\thave %#v\n\twant %#v\n", tt.file, i, p.ProgHeader, ph)
}
}
tn := len(tt.sections)
fn := len(f.Sections)
if tn != fn {
t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn)
}
tn = len(tt.progs)
fn = len(f.Progs)
if tn != fn {
t.Errorf("open %s: len(Progs) = %d, want %d", tt.file, fn, tn)
}
tl := tt.needed
fl, err := f.ImportedLibraries()
if err != nil {
t.Error(err)
}
if !reflect.DeepEqual(tl, fl) {
t.Errorf("open %s: DT_NEEDED = %v, want %v", tt.file, tl, fl)
}
symbols, err := f.Symbols()
if tt.symbols == nil {
if !errors.Is(err, ErrNoSymbols) {
t.Errorf("open %s: Symbols() expected ErrNoSymbols, have nil", tt.file)
}
if symbols != nil {
t.Errorf("open %s: Symbols() expected no symbols, have %v", tt.file, symbols)
}
} else {
if err != nil {
t.Errorf("open %s: Symbols() unexpected error %v", tt.file, err)
}
if !slices.Equal(symbols, tt.symbols) {
t.Errorf("open %s: Symbols() = %v, want %v", tt.file, symbols, tt.symbols)
}
}
}
}
// elf.NewFile requires io.ReaderAt, which compress/gzip cannot
// provide. Decompress the file to a bytes.Reader.
func decompress(gz string) (io.ReaderAt, error) {
in, err := os.Open(gz)
if err != nil {
return nil, err
}
defer in.Close()
r, err := gzip.NewReader(in)
if err != nil {
return nil, err
}
var out bytes.Buffer
_, err = io.Copy(&out, r)
return bytes.NewReader(out.Bytes()), err
}
type relocationTestEntry struct {
entryNumber int
entry *dwarf.Entry
pcRanges [][2]uint64
}
type relocationTest struct {
file string
entries []relocationTestEntry
}
var relocationTests = []relocationTest{
{
"testdata/go-relocation-test-gcc441-x86-64.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
pcRanges: [][2]uint64{{0x0, 0x6}},
},
},
},
{
"testdata/go-relocation-test-gcc441-x86.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
pcRanges: [][2]uint64{{0x0, 0x5}},
},
},
},
{
"testdata/go-relocation-test-gcc424-x86-64.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
pcRanges: [][2]uint64{{0x0, 0x6}},
},
},
},
{
"testdata/go-relocation-test-gcc482-aarch64.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
pcRanges: [][2]uint64{{0x0, 0x24}},
},
},
},
{
"testdata/go-relocation-test-gcc492-arm.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
pcRanges: [][2]uint64{{0x0, 0x28}},
},
},
},
{
"testdata/go-relocation-test-clang-arm.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
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},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.c", Class: dwarf.ClassString},
{Attr: dwarf.AttrStmtList, Val: int64(0x0), Class: dwarf.ClassLinePtr},
{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString},
{Attr: dwarf.AttrLowpc, Val: uint64(0x0), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrHighpc, Val: int64(0x30), Class: dwarf.ClassConstant},
},
},
pcRanges: [][2]uint64{{0x0, 0x30}},
},
},
},
{
"testdata/go-relocation-test-gcc5-ppc.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C11 5.0.0 20150116 (experimental) -Asystem=linux -Asystem=unix -Asystem=posix -g", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "go-relocation-test-gcc5-ppc.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(0x44), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x44}},
},
},
},
{
"testdata/go-relocation-test-gcc482-ppc64le.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
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},
{Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "go-relocation-test-gcc482-ppc64le.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(0x24), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x24}},
},
},
},
{
"testdata/go-relocation-test-gcc492-mips64.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C 4.9.2 -meb -mabi=64 -march=mips3 -mtune=mips64 -mllsc -mno-shared -g", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x64), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x64}},
},
},
},
{
"testdata/go-relocation-test-gcc531-s390x.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C11 5.3.1 20160316 -march=zEC12 -m64 -mzarch -g -fstack-protector-strong", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x3a), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x3a}},
},
},
},
{
"testdata/go-relocation-test-gcc620-sparc64.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C11 6.2.0 20160914 -mcpu=v9 -g -fstack-protector-strong", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x2c), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x2c}},
},
},
},
{
"testdata/go-relocation-test-gcc492-mipsle.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C 4.9.2 -mel -march=mips2 -mtune=mips32 -mllsc -mno-shared -mabi=32 -g", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x58), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x58}},
},
},
},
{
"testdata/go-relocation-test-gcc540-mips.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C11 5.4.0 20160609 -meb -mips32 -mtune=mips32r2 -mfpxx -mllsc -mno-shared -mabi=32 -g -gdwarf-2", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x5c), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x5c}},
},
},
},
{
"testdata/go-relocation-test-gcc493-mips64le.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C 4.9.3 -mel -mabi=64 -mllsc -mno-shared -g -fstack-protector-strong", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(1), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x64), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x64}},
},
},
},
{
"testdata/go-relocation-test-gcc720-riscv64.obj",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C11 7.2.0 -march=rv64imafdc -mabi=lp64d -g -gdwarf-2", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "hello.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(0x2c), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{{0x0, 0x2c}},
},
},
},
{
"testdata/go-relocation-test-clang-x86.obj",
[]relocationTestEntry{
{
entry: &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},
},
},
},
},
},
{
"testdata/gcc-amd64-openbsd-debug-with-rela.obj",
[]relocationTestEntry{
{
entryNumber: 203,
entry: &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},
},
},
},
{
entryNumber: 204,
entry: &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},
},
},
},
},
},
{
"testdata/go-relocation-test-gcc930-ranges-no-rela-x86-64",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C17 9.3.0 -mtune=generic -march=x86-64 -g -fno-asynchronous-unwind-tables", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "multiple-code-sections.c", Class: dwarf.ClassString},
{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString},
{Attr: dwarf.AttrRanges, Val: int64(0), Class: dwarf.ClassRangeListPtr},
{Attr: dwarf.AttrLowpc, Val: uint64(0), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{
{0x765, 0x777},
{0x7e1, 0x7ec},
},
},
},
},
{
"testdata/go-relocation-test-gcc930-ranges-with-rela-x86-64",
[]relocationTestEntry{
{
entry: &dwarf.Entry{
Offset: 0xb,
Tag: dwarf.TagCompileUnit,
Children: true,
Field: []dwarf.Field{
{Attr: dwarf.AttrProducer, Val: "GNU C17 9.3.0 -mtune=generic -march=x86-64 -g -fno-asynchronous-unwind-tables", Class: dwarf.ClassString},
{Attr: dwarf.AttrLanguage, Val: int64(12), Class: dwarf.ClassConstant},
{Attr: dwarf.AttrName, Val: "multiple-code-sections.c", Class: dwarf.ClassString},
{Attr: dwarf.AttrCompDir, Val: "/tmp", Class: dwarf.ClassString},
{Attr: dwarf.AttrRanges, Val: int64(0), Class: dwarf.ClassRangeListPtr},
{Attr: dwarf.AttrLowpc, Val: uint64(0), Class: dwarf.ClassAddress},
{Attr: dwarf.AttrStmtList, Val: int64(0), Class: dwarf.ClassLinePtr},
},
},
pcRanges: [][2]uint64{
{0x765, 0x777},
{0x7e1, 0x7ec},
},
},
},
},
}
func TestDWARFRelocations(t *testing.T) {
for _, test := range relocationTests {
t.Run(test.file, func(t *testing.T) {
t.Parallel()
f, err := Open(test.file)
if err != nil {
t.Fatal(err)
}
dwarf, err := f.DWARF()
if err != nil {
t.Fatal(err)
}
reader := dwarf.Reader()
idx := 0
for _, testEntry := range test.entries {
if testEntry.entryNumber < idx {
t.Fatalf("internal test error: %d < %d", testEntry.entryNumber, idx)
}
for ; idx < testEntry.entryNumber; idx++ {
entry, err := reader.Next()
if entry == nil || err != nil {
t.Fatalf("Failed to skip to entry %d: %v", testEntry.entryNumber, err)
}
}
entry, err := reader.Next()
idx++
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(testEntry.entry, entry) {
t.Errorf("entry %d mismatch: got:%#v want:%#v", testEntry.entryNumber, entry, testEntry.entry)
}
pcRanges, err := dwarf.Ranges(entry)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(testEntry.pcRanges, pcRanges) {
t.Errorf("entry %d: PC range mismatch: got:%#v want:%#v", testEntry.entryNumber, pcRanges, testEntry.pcRanges)
}
}
})
}
}
func TestCompressedDWARF(t *testing.T) {
// Test file built with GCC 4.8.4 and as 2.24 using:
// gcc -Wa,--compress-debug-sections -g -c -o zdebug-test-gcc484-x86-64.obj hello.c
f, err := Open("testdata/zdebug-test-gcc484-x86-64.obj")
if err != nil {
t.Fatal(err)
}
dwarf, err := f.DWARF()
if err != nil {
t.Fatal(err)
}
reader := dwarf.Reader()
n := 0
for {
entry, err := reader.Next()
if err != nil {
t.Fatal(err)
}
if entry == nil {
break
}
n++
}
if n != 18 {
t.Fatalf("want %d DWARF entries, got %d", 18, n)
}
}
func TestCompressedSection(t *testing.T) {
// Test files built with gcc -g -S hello.c and assembled with
// --compress-debug-sections=zlib-gabi.
f, err := Open("testdata/compressed-64.obj")
if err != nil {
t.Fatal(err)
}
sec := f.Section(".debug_info")
wantData := []byte{
182, 0, 0, 0, 4, 0, 0, 0, 0, 0, 8, 1, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 27, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 8, 7,
0, 0, 0, 0, 2, 1, 8, 0, 0, 0, 0, 2, 2, 7, 0, 0,
0, 0, 2, 4, 7, 0, 0, 0, 0, 2, 1, 6, 0, 0, 0, 0,
2, 2, 5, 0, 0, 0, 0, 3, 4, 5, 105, 110, 116, 0, 2, 8,
5, 0, 0, 0, 0, 2, 8, 7, 0, 0, 0, 0, 4, 8, 114, 0,
0, 0, 2, 1, 6, 0, 0, 0, 0, 5, 0, 0, 0, 0, 1, 4,
0, 0, 0, 0, 0, 0, 0, 0, 27, 0, 0, 0, 0, 0, 0, 0,
1, 156, 179, 0, 0, 0, 6, 0, 0, 0, 0, 1, 4, 87, 0, 0,
0, 2, 145, 108, 6, 0, 0, 0, 0, 1, 4, 179, 0, 0, 0, 2,
145, 96, 0, 4, 8, 108, 0, 0, 0, 0,
}
// Test Data method.
b, err := sec.Data()
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(wantData, b) {
t.Fatalf("want data %x, got %x", wantData, b)
}
// Test Open method and seeking.
buf, have, count := make([]byte, len(b)), make([]bool, len(b)), 0
sf := sec.Open()
if got, err := sf.Seek(0, io.SeekEnd); got != int64(len(b)) || err != nil {
t.Fatalf("want seek end %d, got %d error %v", len(b), got, err)
}
if n, err := sf.Read(buf); n != 0 || err != io.EOF {
t.Fatalf("want EOF with 0 bytes, got %v with %d bytes", err, n)
}
pos := int64(len(buf))
for count < len(buf) {
// Construct random seek arguments.
whence := rand.Intn(3)
target := rand.Int63n(int64(len(buf)))
var offset int64
switch whence {
case io.SeekStart:
offset = target
case io.SeekCurrent:
offset = target - pos
case io.SeekEnd:
offset = target - int64(len(buf))
}
pos, err = sf.Seek(offset, whence)
if err != nil {
t.Fatal(err)
}
if pos != target {
t.Fatalf("want position %d, got %d", target, pos)
}
// Read data from the new position.
end := pos + 16
if end > int64(len(buf)) {
end = int64(len(buf))
}
n, err := io.ReadFull(sf, buf[pos:end])
if err != nil {
t.Fatal(err)
}
for i := 0; i < n; i++ {
if !have[pos] {
have[pos] = true
count++
}
pos++
}
}
if !bytes.Equal(wantData, buf) {
t.Fatalf("want data %x, got %x", wantData, buf)
}
}
func TestNoSectionOverlaps(t *testing.T) {
// Ensure cmd/link outputs sections without overlaps.
switch runtime.GOOS {
case "aix", "android", "darwin", "ios", "js", "plan9", "windows", "wasip1":
t.Skipf("cmd/link doesn't produce ELF binaries on %s", runtime.GOOS)
}
_ = net.ResolveIPAddr // force dynamic linkage
f, err := Open(os.Args[0])
if err != nil {
t.Error(err)
return
}
for i, si := range f.Sections {
sih := si.SectionHeader
if sih.Type == SHT_NOBITS {
continue
}
// checking for overlap in file
for j, sj := range f.Sections {
sjh := sj.SectionHeader
if i == j || sjh.Type == SHT_NOBITS || sih.Offset == sjh.Offset && sih.FileSize == 0 {
continue
}
if sih.Offset >= sjh.Offset && sih.Offset < sjh.Offset+sjh.FileSize {
t.Errorf("ld produced ELF with section offset %s within %s: 0x%x <= 0x%x..0x%x < 0x%x",
sih.Name, sjh.Name, sjh.Offset, sih.Offset, sih.Offset+sih.FileSize, sjh.Offset+sjh.FileSize)
}
}
if sih.Flags&SHF_ALLOC == 0 {
continue
}
// checking for overlap in address space
for j, sj := range f.Sections {
sjh := sj.SectionHeader
if i == j || sjh.Flags&SHF_ALLOC == 0 || sjh.Type == SHT_NOBITS ||
sih.Addr == sjh.Addr && sih.Size == 0 {
continue
}
if sih.Addr >= sjh.Addr && sih.Addr < sjh.Addr+sjh.Size {
t.Errorf("ld produced ELF with section address %s within %s: 0x%x <= 0x%x..0x%x < 0x%x",
sih.Name, sjh.Name, sjh.Addr, sih.Addr, sih.Addr+sih.Size, sjh.Addr+sjh.Size)
}
}
}
}
func TestNobitsSection(t *testing.T) {
const testdata = "testdata/gcc-amd64-linux-exec"
f, err := Open(testdata)
if err != nil {
t.Fatalf("could not read %s: %v", testdata, err)
}
defer f.Close()
wantError := "unexpected read from SHT_NOBITS section"
bss := f.Section(".bss")
_, err = bss.Data()
if err == nil || err.Error() != wantError {
t.Fatalf("bss.Data() got error %q, want error %q", err, wantError)
}
r := bss.Open()
p := make([]byte, 1)
_, err = r.Read(p)
if err == nil || err.Error() != wantError {
t.Fatalf("r.Read(p) got error %q, want error %q", err, wantError)
}
}
// TestLargeNumberOfSections tests the case that a file has greater than or
// equal to 65280 (0xff00) sections.
func TestLargeNumberOfSections(t *testing.T) {
// A file with >= 0xff00 sections is too big, so we will construct it on the
// fly. The original file "y.o" is generated by these commands:
// 1. generate "y.c":
// for i in `seq 1 65288`; do
// printf -v x "%04x" i;
// echo "int var_$x __attribute__((section(\"section_$x\"))) = $i;"
// done > y.c
// 2. compile: gcc -c y.c -m32
//
// $readelf -h y.o
// ELF Header:
// Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
// Class: ELF32
// Data: 2's complement, little endian
// Version: 1 (current)
// OS/ABI: UNIX - System V
// ABI Version: 0
// Type: REL (Relocatable file)
// Machine: Intel 80386
// Version: 0x1
// Entry point address: 0x0
// Start of program headers: 0 (bytes into file)
// Start of section headers: 3003468 (bytes into file)
// Flags: 0x0
// Size of this header: 52 (bytes)
// Size of program headers: 0 (bytes)
// Number of program headers: 0
// Size of section headers: 40 (bytes)
// Number of section headers: 0 (65298)
// Section header string table index: 65535 (65297)
//
// $readelf -S y.o
// There are 65298 section headers, starting at offset 0x2dd44c:
// Section Headers:
// [Nr] Name Type Addr Off Size ES Flg Lk Inf Al
// [ 0] NULL 00000000 000000 00ff12 00 65297 0 0
// [ 1] .text PROGBITS 00000000 000034 000000 00 AX 0 0 1
// [ 2] .data PROGBITS 00000000 000034 000000 00 WA 0 0 1
// [ 3] .bss NOBITS 00000000 000034 000000 00 WA 0 0 1
// [ 4] section_0001 PROGBITS 00000000 000034 000004 00 WA 0 0 4
// [ 5] section_0002 PROGBITS 00000000 000038 000004 00 WA 0 0 4
// [ section_0003 ~ section_ff06 truncated ]
// [65290] section_ff07 PROGBITS 00000000 03fc4c 000004 00 WA 0 0 4
// [65291] section_ff08 PROGBITS 00000000 03fc50 000004 00 WA 0 0 4
// [65292] .comment PROGBITS 00000000 03fc54 000027 01 MS 0 0 1
// [65293] .note.GNU-stack PROGBITS 00000000 03fc7b 000000 00 0 0 1
// [65294] .symtab SYMTAB 00000000 03fc7c 0ff0a0 10 65296 2 4
// [65295] .symtab_shndx SYMTAB SECTION 00000000 13ed1c 03fc28 04 65294 0 4
// [65296] .strtab STRTAB 00000000 17e944 08f74d 00 0 0 1
// [65297] .shstrtab STRTAB 00000000 20e091 0cf3bb 00 0 0 1
var buf bytes.Buffer
{
buf.Grow(0x55AF1C) // 3003468 + 40 * 65298
h := Header32{
Ident: [16]byte{0x7F, 'E', 'L', 'F', 0x01, 0x01, 0x01},
Type: 1,
Machine: 3,
Version: 1,
Shoff: 0x2DD44C,
Ehsize: 0x34,
Shentsize: 0x28,
Shnum: 0,
Shstrndx: 0xFFFF,
}
binary.Write(&buf, binary.LittleEndian, h)
// Zero out sections [1]~[65294].
buf.Write(bytes.Repeat([]byte{0}, 0x13ED1C-binary.Size(h)))
// Write section [65295]. Section [65295] are all zeros except for the
// last 48 bytes.
buf.Write(bytes.Repeat([]byte{0}, 0x03FC28-12*4))
for i := 0; i < 12; i++ {
binary.Write(&buf, binary.LittleEndian, uint32(0xFF00|i))
}
// Write section [65296].
buf.Write([]byte{0})
buf.Write([]byte("y.c\x00"))
for i := 1; i <= 65288; i++ {
// var_0001 ~ var_ff08
name := fmt.Sprintf("var_%04x", i)
buf.Write([]byte(name))
buf.Write([]byte{0})
}
// Write section [65297].
buf.Write([]byte{0})
buf.Write([]byte(".symtab\x00"))
buf.Write([]byte(".strtab\x00"))
buf.Write([]byte(".shstrtab\x00"))
buf.Write([]byte(".text\x00"))
buf.Write([]byte(".data\x00"))
buf.Write([]byte(".bss\x00"))
for i := 1; i <= 65288; i++ {
// s_0001 ~ s_ff08
name := fmt.Sprintf("section_%04x", i)
buf.Write([]byte(name))
buf.Write([]byte{0})
}
buf.Write([]byte(".comment\x00"))
buf.Write([]byte(".note.GNU-stack\x00"))
buf.Write([]byte(".symtab_shndx\x00"))
// Write section header table.
// NULL
binary.Write(&buf, binary.LittleEndian, Section32{Name: 0, Size: 0xFF12, Link: 0xFF11})
// .text
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x1B,
Type: uint32(SHT_PROGBITS),
Flags: uint32(SHF_ALLOC | SHF_EXECINSTR),
Off: 0x34,
Addralign: 0x01,
})
// .data
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x21,
Type: uint32(SHT_PROGBITS),
Flags: uint32(SHF_WRITE | SHF_ALLOC),
Off: 0x34,
Addralign: 0x01,
})
// .bss
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x27,
Type: uint32(SHT_NOBITS),
Flags: uint32(SHF_WRITE | SHF_ALLOC),
Off: 0x34,
Addralign: 0x01,
})
// s_1 ~ s_65537
for i := 0; i < 65288; i++ {
s := Section32{
Name: uint32(0x2C + i*13),
Type: uint32(SHT_PROGBITS),
Flags: uint32(SHF_WRITE | SHF_ALLOC),
Off: uint32(0x34 + i*4),
Size: 0x04,
Addralign: 0x04,
}
binary.Write(&buf, binary.LittleEndian, s)
}
// .comment
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x0CF394,
Type: uint32(SHT_PROGBITS),
Flags: uint32(SHF_MERGE | SHF_STRINGS),
Off: 0x03FC54,
Size: 0x27,
Addralign: 0x01,
Entsize: 0x01,
})
// .note.GNU-stack
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x0CF39D,
Type: uint32(SHT_PROGBITS),
Off: 0x03FC7B,
Addralign: 0x01,
})
// .symtab
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x01,
Type: uint32(SHT_SYMTAB),
Off: 0x03FC7C,
Size: 0x0FF0A0,
Link: 0xFF10,
Info: 0x02,
Addralign: 0x04,
Entsize: 0x10,
})
// .symtab_shndx
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x0CF3AD,
Type: uint32(SHT_SYMTAB_SHNDX),
Off: 0x13ED1C,
Size: 0x03FC28,
Link: 0xFF0E,
Addralign: 0x04,
Entsize: 0x04,
})
// .strtab
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x09,
Type: uint32(SHT_STRTAB),
Off: 0x17E944,
Size: 0x08F74D,
Addralign: 0x01,
})
// .shstrtab
binary.Write(&buf, binary.LittleEndian, Section32{
Name: 0x11,
Type: uint32(SHT_STRTAB),
Off: 0x20E091,
Size: 0x0CF3BB,
Addralign: 0x01,
})
}
data := buf.Bytes()
f, err := NewFile(bytes.NewReader(data))
if err != nil {
t.Errorf("cannot create file from data: %v", err)
}
defer f.Close()
wantFileHeader := FileHeader{
Class: ELFCLASS32,
Data: ELFDATA2LSB,
Version: EV_CURRENT,
OSABI: ELFOSABI_NONE,
ByteOrder: binary.LittleEndian,
Type: ET_REL,
Machine: EM_386,
}
if f.FileHeader != wantFileHeader {
t.Errorf("\nhave %#v\nwant %#v\n", f.FileHeader, wantFileHeader)
}
wantSectionNum := 65298
if len(f.Sections) != wantSectionNum {
t.Errorf("len(Sections) = %d, want %d", len(f.Sections), wantSectionNum)
}
wantSectionHeader := SectionHeader{
Name: "section_0007",
Type: SHT_PROGBITS,
Flags: SHF_WRITE + SHF_ALLOC,
Offset: 0x4c,
Size: 0x4,
Addralign: 0x4,
FileSize: 0x4,
}
if f.Sections[10].SectionHeader != wantSectionHeader {
t.Errorf("\nhave %#v\nwant %#v\n", f.Sections[10].SectionHeader, wantSectionHeader)
}
}
func TestIssue10996(t *testing.T) {
data := []byte("\u007fELF\x02\x01\x010000000000000" +
"\x010000000000000000000" +
"\x00\x00\x00\x00\x00\x00\x00\x0000000000\x00\x00\x00\x00" +
"0000")
_, err := NewFile(bytes.NewReader(data))
if err == nil {
t.Fatalf("opening invalid ELF file unexpectedly succeeded")
}
}
func TestDynValue(t *testing.T) {
const testdata = "testdata/gcc-amd64-linux-exec"
f, err := Open(testdata)
if err != nil {
t.Fatalf("could not read %s: %v", testdata, err)
}
defer f.Close()
vals, err := f.DynValue(DT_VERNEEDNUM)
if err != nil {
t.Fatalf("DynValue(DT_VERNEEDNUM): got unexpected error %v", err)
}
if len(vals) != 1 || vals[0] != 1 {
t.Errorf("DynValue(DT_VERNEEDNUM): got %v, want [1]", vals)
}
}
func TestIssue59208(t *testing.T) {
// corrupted dwarf data should raise invalid dwarf data instead of invalid zlib
const orig = "testdata/compressed-64.obj"
f, err := Open(orig)
if err != nil {
t.Fatal(err)
}
sec := f.Section(".debug_info")
data, err := os.ReadFile(orig)
if err != nil {
t.Fatal(err)
}
dn := make([]byte, len(data))
zoffset := sec.Offset + uint64(sec.compressionOffset)
copy(dn, data[:zoffset])
ozd, err := sec.Data()
if err != nil {
t.Fatal(err)
}
buf := bytes.NewBuffer(nil)
wr := zlib.NewWriter(buf)
// corrupt origin data same as COMPRESS_ZLIB
copy(ozd, []byte{1, 0, 0, 0})
wr.Write(ozd)
wr.Close()
copy(dn[zoffset:], buf.Bytes())
copy(dn[sec.Offset+sec.FileSize:], data[sec.Offset+sec.FileSize:])
nf, err := NewFile(bytes.NewReader(dn))
if err != nil {
t.Error(err)
}
const want = "decoding dwarf section info"
_, err = nf.DWARF()
if err == nil || !strings.Contains(err.Error(), want) {
t.Errorf("DWARF = %v; want %q", err, want)
}
}
func BenchmarkSymbols64(b *testing.B) {
const testdata = "testdata/gcc-amd64-linux-exec"
f, err := Open(testdata)
if err != nil {
b.Fatalf("could not read %s: %v", testdata, err)
}
defer f.Close()
b.ResetTimer()
for i := 0; i < b.N; i++ {
symbols, err := f.Symbols()
if err != nil {
b.Fatalf("Symbols(): got unexpected error %v", err)
}
if len(symbols) != 73 {
b.Errorf("\nhave %d symbols\nwant %d symbols\n", len(symbols), 73)
}
}
}
func BenchmarkSymbols32(b *testing.B) {
const testdata = "testdata/gcc-386-freebsd-exec"
f, err := Open(testdata)
if err != nil {
b.Fatalf("could not read %s: %v", testdata, err)
}
defer f.Close()
b.ResetTimer()
for i := 0; i < b.N; i++ {
symbols, err := f.Symbols()
if err != nil {
b.Fatalf("Symbols(): got unexpected error %v", err)
}
if len(symbols) != 74 {
b.Errorf("\nhave %d symbols\nwant %d symbols\n", len(symbols), 74)
}
}
}