KAIST SoC 19’

16 minute read

x64 Linux Calling Convention

  • 스택 메모리에서 서브루틴은 호출자의 아래쪽으로 생성된다.
  • 인자는 순서대로 rdi, rsi, rdx, r8, r9, r10 레지스터를 통해 전달된다. 6번째 이후의 인자는 32비트 호출 규약과 동일하게 rbp 위 함수의 return address 위에 쌓인다.
  • rax 레지스터는 서브루틴의 리턴값을 전달한다.

예를 통해 직접 과정을 따라가보는 것이 가장 이해하기 좋다.

예

단순하게 두 수를 더해서 다른 변수에 저장하는 c코드를 작성해보았다:

int add(int a, int b){
    return a+b;
}

int main(){
    int a,b,c;
    a = 3;
    b = 7;
    c = add(a, b);
    return 0;
}

를 다음과 같이 64비트 컴파일을 하고 gdb로 확인해보자.

gcc -m64 add.c -o add
gdb add

그러면 아래와 같은 어셈블리 코드를 볼 수 있는데 main의 시작 지점부터 어셈블리 instruction을 한 단계씩 실행시켜서 메모리와 레지스터 정보를 확인하면 아래와 같은 과정을 그려볼 수 있다. 모바일 환경에서는 잘려서 보이니 데스크탑 환경으로 보자.

  • 메모리를 표로 그렸는데, 기본적으로 한 칸은 8바이트이지만 movl과 같이 4바이트 단위로 쪼개지는 instruction이 발생할 경우 예외적으로 4바이트 띄어서 표현했다.
  • rip는 레지스터 표가 아닌, 왼쪽에 어셈블리 코드에 화살표로 나타냈고, rsp와 rbp는 메모리 표에 위치를 나타낼 수 있을 때 메모리에 표시했다.
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
rsp0x7fffffffe388

Register Value
rbp0x400540
 
(gdb) disass main
Dump of assembler code for function main:
-> 0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rsp0x7fffffffe3800x400540

Register Value
rbp0x400540
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
-> 0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp,rsp0x7fffffffe3800x400540

Register Value 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
-> 0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe378
rsp0x7fffffffe370

Register Value 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
-> 0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe378
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
-> 0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
-> 0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value
rdx0x7
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
-> 0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value
rdx0x7
rax0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
-> 0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value
rdx0x7
rax0x3
rsi0x7
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
-> 0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
-> 0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
rsp0x7fffffffe3680x40052f

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
-> 0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rsp0x7fffffffe3600x7fffffffe380

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
-> 0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
-> 0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
-> 0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x7
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
-> 0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0x3
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
-> 0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0x7
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
-> 0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
rbp,rsp0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0xa
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
-> 0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370
0x7fffffffe3680x40052f
0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0xa
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
-> 0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c0xa
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370
0x7fffffffe3680x40052f
0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0xa
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
-> 0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp0x7fffffffe3800x400540
0x7fffffffe37c0xa
0x7fffffffe3780x7
0x7fffffffe3740x3
rsp0x7fffffffe370
0x7fffffffe3680x40052f
0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0x0
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
-> 0x0000000000400537 <+45>:	leaveq 
   0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
0x7fffffffe388
rbp,rsp0x7fffffffe3800x400540
0x7fffffffe37c0xa
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0x0
rsi0x7
rdi0x3
 
(gdb) disass main
Dump of assembler code for function main:
   0x000000000040050a <+0>:	push   %rbp
   0x000000000040050b <+1>:	mov    %rsp,%rbp
   0x000000000040050e <+4>:	sub    $0x10,%rsp
   0x0000000000400512 <+8>:	movl   $0x3,-0xc(%rbp)
   0x0000000000400519 <+15>:	movl   $0x7,-0x8(%rbp)
   0x0000000000400520 <+22>:	mov    -0x8(%rbp),%edx
   0x0000000000400523 <+25>:	mov    -0xc(%rbp),%eax
   0x0000000000400526 <+28>:	mov    %edx,%esi
   0x0000000000400528 <+30>:	mov    %eax,%edi
   0x000000000040052a <+32>:	callq  0x4004f6 <add>
   0x000000000040052f <+37>:	mov    %eax,-0x4(%rbp)
   0x0000000000400532 <+40>:	mov    $0x0,%eax
   0x0000000000400537 <+45>:	leaveq 
-> 0x0000000000400538 <+46>:	retq   
End of assembler dump.
(gdb) disass add
Dump of assembler code for function add:
   0x00000000004004f6 <+0>:	push   %rbp
   0x00000000004004f7 <+1>:	mov    %rsp,%rbp
   0x00000000004004fa <+4>:	mov    %edi,-0x4(%rbp)
   0x00000000004004fd <+7>:	mov    %esi,-0x8(%rbp)
   0x0000000000400500 <+10>:	mov    -0x4(%rbp),%edx
   0x0000000000400503 <+13>:	mov    -0x8(%rbp),%eax
   0x0000000000400506 <+16>:	add    %edx,%eax
   0x0000000000400508 <+18>:	pop    %rbp
   0x0000000000400509 <+19>:	retq   
End of assembler dump.
Address Value
rsp0x7fffffffe388
0x7fffffffe3800x400540
0x7fffffffe37c0xa
0x7fffffffe3780x7
0x7fffffffe3740x3
0x7fffffffe370
0x7fffffffe3680x40052f
0x7fffffffe3600x7fffffffe380
0x7fffffffe35c0x3
0x7fffffffe3580x7

Register Value
rdx0x3
rax0x0
rsi0x7
rdi0x3
rbp0x400540

관련된 Assembly Instructions

  • push Reg: rsp를 8만큼 감소시키고 mov Reg, (%rsp)한다.
  • pop Reg: mov (%rsp), Reg 후 rsp를 8 증가시킨다.
  • call Dest: push 다음 인스트럭션 후 mov Dest, %rip한다.
  • ret: pop %rip
  • leave: mov %rsp, %rbp

Categories:

Updated:

Leave a comment