objdump(Linux)反汇编命令使用指南

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/* main.c */
#include <stdio.h>

void swap(int* first, int* second)
{
    int temp = *first;
    *first = *second;
    *second = temp;
}

int main(void)
{
    int a = 10;
    int b = 20;

    printf("a = %d; b = %d;\n", a, b);
    swap(&a, &b);
    printf("a = %d; b = %d;\n", a, b);

    return 0;
}

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gcc -S -o main.s main.c

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    .file   "main.c"
    .text
    .globl  swap
    .type   swap, @function
swap:
.LFB0:
    .cfi_startproc
    pushq   %rbp
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    movq    %rsp, %rbp
    .cfi_def_cfa_register 6
    movq    %rdi, -24(%rbp)
    movq    %rsi, -32(%rbp)
    movq    -24(%rbp), %rax
    ...

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gcc -c -o main.o main.c
objdump -s -d main.o > main.o.txt

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gcc -g -c -o main.o main.c
objdump -S -d main.o > main.o.txt

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objdump -j .text -ld -C -S main.o > main.o.txt

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gcc -o main main.c
objdump -s -d main > main.txt

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gcc -g -o main main.c
objdump -S -d main > main.txt

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Usage: objdump <option(s)> <file(s)>
    Display information from object <file(s)>.
    At least one of the following switches must be given:
    -a, --archive-headers    Display archive header information
    -f, --file-headers       Display the contents of the overall file header
    -p, --private-headers    Display object format specific file header contents
    -P, --private=OPT,OPT... Display object format specific contents
    -h, --[section-]headers  Display the contents of the section headers
    -x, --all-headers        Display the contents of all headers
    -d, --disassemble        Display assembler contents of executable sections
    -D, --disassemble-all    Display assembler contents of all sections
    -S, --source             Intermix source code with disassembly
    -s, --full-contents      Display the full contents of all sections requested
    -g, --debugging          Display debug information in object file
    -e, --debugging-tags     Display debug information using ctags style
    -G, --stabs              Display (in raw form) any STABS info in the file
    -W[lLiaprmfFsoRt] or
    --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,
          =frames-interp,=str,=loc,=Ranges,=pubtypes,
          =gdb_index,=trace_info,=trace_abbrev,=trace_aranges,
          =addr,=cu_index]
                           Display DWARF info in the file
    -t, --syms               Display the contents of the symbol table(s)
    -T, --dynamic-syms       Display the contents of the dynamic symbol table
    -r, --reloc              Display the relocation entries in the file
    -R, --dynamic-reloc      Display the dynamic relocation entries in the file @<file>                  Read options from <file>
    -v, --version            Display this program's version number
    -i, --info               List object formats and architectures supported
    -H, --help               Display this information

 The following switches are optional:
    -b, --target=BFDNAME     Specify the target object format as BFDNAME
    -m, --architecture=MACHINE     Specify the target architecture as MACHINE
    -j, --section=NAME       Only display information for section NAME
    -M, --disassembler-options=OPT Pass text OPT on to the disassembler
    -EB --endian=big         Assume big endian format when disassembling
    -EL --endian=little      Assume little endian format when disassembling
      --file-start-context   Include context from start of file (with -S)
    -I, --include=DIR        Add DIR to search list for source files
    -l, --line-numbers       Include line numbers and filenames in output
    -F, --file-offsets       Include file offsets when displaying information
    -C, --demangle[=STYLE]   Decode mangled/processed symbol names
                             The STYLE, if specified, can be `auto', `gnu',
                                  `lucid', `arm', `hp', `edg', `gnu-v3', `java'
                                  or `gnat'
    -w, --wide               Format output for more than 80 columns
    -z, --disassemble-zeroes       Do not skip blocks of zeroes when disassembling
      --start-address=ADDR   Only process data whose address is >= ADDR
      --stop-address=ADDR    Only process data whose address is <= ADDR
      --prefix-addresses     Print complete address alongside disassembly
      --[no-]show-raw-insn   Display hex alongside symbolic disassembly
      --insn-width=WIDTH     Display WIDTH bytes on a single line for -d
      --adjust-vma=OFFSET    Add OFFSET to all displayed section addresses
      --special-syms         Include special symbols in symbol dumps
      --prefix=PREFIX        Add PREFIX to absolute paths for -S
      --prefix-strip=LEVEL   Strip initial directory names for -S
      --dwarf-depth=N        Do not display DIEs at depth N or greater
      --dwarf-start=N        Display DIEs starting with N, at the same depth
                             or deeper
      --dwarf-check          Make additional dwarf internal consistency checks.      

objdump: supported targets: elf64-x86-64 elf32-i386 elf32-x86-64 a.out-i386-linux pei-i386 pei-x86-64 elf64-l1om elf64-k1om elf64-little elf64-big elf32-little elf32-big plugin srec symbolsrec verilog tekhex binary ihex
objdump: supported architectures: i386 i386:x86-64 i386:x64-32 i8086 i386:intel i386:x86-64:intel i386:x64-32:intel l1om l1om:intel k1om k1om:intel plugin

The following i386/x86-64 specific disassembler options are supported for use
with the -M switch (multiple options should be separated by commas):
    x86-64      Disassemble in 64bit mode
    i386        Disassemble in 32bit mode
    i8086       Disassemble in 16bit mode
    att         Display instruction in AT&T syntax
    intel       Display instruction in Intel syntax
    att-mnemonic
                Display instruction in AT&T mnemonic
    intel-mnemonic
                Display instruction in Intel mnemonic
    addr64      Assume 64bit address size
    addr32      Assume 32bit address size
    addr16      Assume 16bit address size
    data32      Assume 32bit data size
    data16      Assume 16bit data size
    suffix      Always display instruction suffix in AT&T syntax
Report bugs to <http://bugzilla.redhat.com/bugzilla/>.