顯示程序原始機器碼
例子
#include <stdio.h>
int main(void)
{
printf("Hello, world\n");
return 0;
}
技巧
使用“disassemble /r”命令可以用16進制形式顯示程序的原始機器碼。以上面程序為例:
(gdb) disassemble /r main
Dump of assembler code for function main:
0x0000000000400530 <+0>: 55 push %rbp
0x0000000000400531 <+1>: 48 89 e5 mov %rsp,%rbp
0x0000000000400534 <+4>: bf e0 05 40 00 mov $0x4005e0,%edi
0x0000000000400539 <+9>: e8 d2 fe ff ff callq 0x400410 <puts@plt>
0x000000000040053e <+14>: b8 00 00 00 00 mov $0x0,%eax
0x0000000000400543 <+19>: 5d pop %rbp
0x0000000000400544 <+20>: c3 retq
End of assembler dump.
(gdb) disassemble /r 0x0000000000400534,+4
Dump of assembler code from 0x400534 to 0x400538:
0x0000000000400534 <main+4>: bf e0 05 40 00 mov $0x4005e0,%edi
End of assembler dump.
詳情參見gdb手冊
貢獻者
nanxiao