CODEWITHSUNDEEP
assemblyx86reverse-engineering
user2624166
user2624166

Reputation: 3

How to view x86 Assembly from C program with .bin extension - Linux

I am trying to view the x86 Assembly for a compiled C program in Linux, for which I do not have the source code. Can this be done with GCC, or do I need a different tool? Thanks.

Upvotes: 0

Views: 253

Answers (2)

Carl Norum
Carl Norum

Reputation: 224964

GCC is a compiler. What you're looking for is a disassembler. On linux, you can use objdump(1).

An example (some objdump output snipped for ease of reading):

$ cat example.c 
#include <stdio.h>

int main(void)
{
    printf("Hello, world!\n");
    return 0;
}
$ clang -Wall -Wextra -O2 -o example example.c
$ ./example 
Hello, world!
$ objdump -d example | grep -A10 '<main>'
0000000000400500 <main>:
  400500:   55                      push   %rbp
  400501:   48 89 e5                mov    %rsp,%rbp
  400504:   bf 0c 06 40 00          mov    $0x40060c,%edi
  400509:   e8 e2 fe ff ff          callq  4003f0 <puts@plt>
  40050e:   31 c0                   xor    %eax,%eax
  400510:   5d                      pop    %rbp
  400511:   c3                      retq   
  400512:   90                      nop
  400513:   90                      nop
  400514:   90                      nop

Upvotes: 1

Jiminion
Jiminion

Reputation: 5168

objdump -d program > dumped.txt

Upvotes: 0

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