#include <stdio.h>
int main()
{
int i = 0;
for (i = 0; i < 5; i ++ )
{
printf("Hello World\n");
}
return 0;
}
int main()
{
int i = 0;
for (i = 0; i < 5; i ++ )
{
printf("Hello World\n");
}
return 0;
}
위와 같은 소스 코드를 컴파일하여 어셈블리 코드와 소스 코드를 보는 방법은 아래와 같다.
gcc -c -g hello.cpp와 같이 컴파일하여 오브젝트 코드를 얻는다.
objdump -dS hello.o > hello.txt와 하면 아래와 같이 어셈블리 코드와 소스 코드를 한번에 확인할 수 있다.
test.o: file format elf32-i386
Disassembly of section .init:
08048348 <_init>:
8048348: 55 push %ebp
8048349: 89 e5 mov %esp,%ebp
804834b: 53 push %ebx
804834c: 83 ec 04 sub $0x4,%esp
804834f: e8 00 00 00 00 call 8048354 <_init+0xc>
8048354: 5b pop %ebx
8048355: 81 c3 88 13 00 00 add $0x1388,%ebx
804835b: 8b 93 fc ff ff ff mov -0x4(%ebx),%edx
8048361: 85 d2 test %edx,%edx
8048363: 74 05 je 804836a <_init+0x22>
8048365: e8 1e 00 00 00 call 8048388 <__gmon_start__@plt>
804836a: e8 c1 00 00 00 call 8048430 <frame_dummy>
804836f: e8 9c 01 00 00 call 8048510 <__do_global_ctors_aux>
8048374: 58 pop %eax
8048375: 5b pop %ebx
8048376: c9 leave
8048377: c3 ret
Disassembly of section .plt:
08048378 <__gmon_start__@plt-0x10>:
8048378: ff 35 e0 96 04 08 pushl 0x80496e0
804837e: ff 25 e4 96 04 08 jmp *0x80496e4
8048384: 00 00 add %al,(%eax)
...
08048388 <__gmon_start__@plt>:
8048388: ff 25 e8 96 04 08 jmp *0x80496e8
804838e: 68 00 00 00 00 push $0x0
8048393: e9 e0 ff ff ff jmp 8048378 <_init+0x30>
08048398 <__libc_start_main@plt>:
8048398: ff 25 ec 96 04 08 jmp *0x80496ec
804839e: 68 08 00 00 00 push $0x8
80483a3: e9 d0 ff ff ff jmp 8048378 <_init+0x30>
080483a8 <puts@plt>:
80483a8: ff 25 f0 96 04 08 jmp *0x80496f0
80483ae: 68 10 00 00 00 push $0x10
80483b3: e9 c0 ff ff ff jmp 8048378 <_init+0x30>
080483b8 <__gxx_personality_v0@plt>:
80483b8: ff 25 f4 96 04 08 jmp *0x80496f4
80483be: 68 18 00 00 00 push $0x18
80483c3: e9 b0 ff ff ff jmp 8048378 <_init+0x30>
Disassembly of section .text:
080483d0 <_start>:
80483d0: 31 ed xor %ebp,%ebp
80483d2: 5e pop %esi
80483d3: 89 e1 mov %esp,%ecx
80483d5: 83 e4 f0 and $0xfffffff0,%esp
80483d8: 50 push %eax
80483d9: 54 push %esp
80483da: 52 push %edx
80483db: 68 a0 84 04 08 push $0x80484a0
80483e0: 68 b0 84 04 08 push $0x80484b0
80483e5: 51 push %ecx
80483e6: 56 push %esi
80483e7: 68 54 84 04 08 push $0x8048454
80483ec: e8 a7 ff ff ff call 8048398 <__libc_start_main@plt>
80483f1: f4 hlt
80483f2: 90 nop
80483f3: 90 nop
80483f4: 90 nop
80483f5: 90 nop
80483f6: 90 nop
80483f7: 90 nop
80483f8: 90 nop
80483f9: 90 nop
80483fa: 90 nop
80483fb: 90 nop
80483fc: 90 nop
80483fd: 90 nop
80483fe: 90 nop
80483ff: 90 nop
08048400 <__do_global_dtors_aux>:
8048400: 55 push %ebp
8048401: 89 e5 mov %esp,%ebp
8048403: 83 ec 08 sub $0x8,%esp
8048406: 80 3d 04 97 04 08 00 cmpb $0x0,0x8049704
804840d: 74 0c je 804841b <__do_global_dtors_aux+0x1b>
804840f: eb 1c jmp 804842d <__do_global_dtors_aux+0x2d>
8048411: 83 c0 04 add $0x4,%eax
8048414: a3 00 97 04 08 mov %eax,0x8049700
8048419: ff d2 call *%edx
804841b: a1 00 97 04 08 mov 0x8049700,%eax
8048420: 8b 10 mov (%eax),%edx
8048422: 85 d2 test %edx,%edx
8048424: 75 eb jne 8048411 <__do_global_dtors_aux+0x11>
8048426: c6 05 04 97 04 08 01 movb $0x1,0x8049704
804842d: c9 leave
804842e: c3 ret
804842f: 90 nop
08048430 <frame_dummy>:
8048430: 55 push %ebp
8048431: 89 e5 mov %esp,%ebp
8048433: 83 ec 08 sub $0x8,%esp
8048436: a1 ec 95 04 08 mov 0x80495ec,%eax
804843b: 85 c0 test %eax,%eax
804843d: 74 12 je 8048451 <frame_dummy+0x21>
804843f: b8 00 00 00 00 mov $0x0,%eax
8048444: 85 c0 test %eax,%eax
8048446: 74 09 je 8048451 <frame_dummy+0x21>
8048448: c7 04 24 ec 95 04 08 movl $0x80495ec,(%esp)
804844f: ff d0 call *%eax
8048451: c9 leave
8048452: c3 ret
8048453: 90 nop
08048454 <main>:
#include <stdio.h>
int main()
8048454: 8d 4c 24 04 lea 0x4(%esp),%ecx
8048458: 83 e4 f0 and $0xfffffff0,%esp
804845b: ff 71 fc pushl -0x4(%ecx)
804845e: 55 push %ebp
804845f: 89 e5 mov %esp,%ebp
8048461: 51 push %ecx
8048462: 83 ec 14 sub $0x14,%esp
{
int i = 0;
8048465: c7 45 f8 00 00 00 00 movl $0x0,-0x8(%ebp)
for (i = 0; i < 5; i ++ )
804846c: c7 45 f8 00 00 00 00 movl $0x0,-0x8(%ebp)
8048473: eb 10 jmp 8048485 <main+0x31>
{
printf("Hello World\n");
8048475: c7 04 24 60 85 04 08 movl $0x8048560,(%esp)
804847c: e8 27 ff ff ff call 80483a8 <puts@plt>
int main()
{
int i = 0;
for (i = 0; i < 5; i ++ )
8048481: 83 45 f8 01 addl $0x1,-0x8(%ebp)
8048485: 83 7d f8 04 cmpl $0x4,-0x8(%ebp)
8048489: 7e ea jle 8048475 <main+0x21>
{
printf("Hello World\n");
}
return 0;
804848b: b8 00 00 00 00 mov $0x0,%eax
}
8048490: 83 c4 14 add $0x14,%esp
8048493: 59 pop %ecx
8048494: 5d pop %ebp
8048495: 8d 61 fc lea -0x4(%ecx),%esp
8048498: c3 ret
8048499: 90 nop
804849a: 90 nop
804849b: 90 nop
804849c: 90 nop
804849d: 90 nop
804849e: 90 nop
804849f: 90 nop
080484a0 <__libc_csu_fini>:
80484a0: 55 push %ebp
80484a1: 89 e5 mov %esp,%ebp
80484a3: 5d pop %ebp
80484a4: c3 ret
80484a5: 8d 74 26 00 lea 0x0(%esi),%esi
80484a9: 8d bc 27 00 00 00 00 lea 0x0(%edi),%edi
080484b0 <__libc_csu_init>:
80484b0: 55 push %ebp
80484b1: 89 e5 mov %esp,%ebp
80484b3: 57 push %edi
80484b4: 56 push %esi
80484b5: 53 push %ebx
80484b6: e8 4f 00 00 00 call 804850a <__i686.get_pc_thunk.bx>
80484bb: 81 c3 21 12 00 00 add $0x1221,%ebx
80484c1: 83 ec 0c sub $0xc,%esp
80484c4: e8 7f fe ff ff call 8048348 <_init>
80484c9: 8d bb 00 ff ff ff lea -0x100(%ebx),%edi
80484cf: 8d 83 00 ff ff ff lea -0x100(%ebx),%eax
80484d5: 29 c7 sub %eax,%edi
80484d7: c1 ff 02 sar $0x2,%edi
80484da: 85 ff test %edi,%edi
80484dc: 74 24 je 8048502 <__libc_csu_init+0x52>
80484de: 31 f6 xor %esi,%esi
80484e0: 8b 45 10 mov 0x10(%ebp),%eax
80484e3: 89 44 24 08 mov %eax,0x8(%esp)
80484e7: 8b 45 0c mov 0xc(%ebp),%eax
80484ea: 89 44 24 04 mov %eax,0x4(%esp)
80484ee: 8b 45 08 mov 0x8(%ebp),%eax
80484f1: 89 04 24 mov %eax,(%esp)
80484f4: ff 94 b3 00 ff ff ff call *-0x100(%ebx,%esi,4)
80484fb: 83 c6 01 add $0x1,%esi
80484fe: 39 f7 cmp %esi,%edi
8048500: 75 de jne 80484e0 <__libc_csu_init+0x30>
8048502: 83 c4 0c add $0xc,%esp
8048505: 5b pop %ebx
8048506: 5e pop %esi
8048507: 5f pop %edi
8048508: 5d pop %ebp
8048509: c3 ret
0804850a <__i686.get_pc_thunk.bx>:
804850a: 8b 1c 24 mov (%esp),%ebx
804850d: c3 ret
804850e: 90 nop
804850f: 90 nop
08048510 <__do_global_ctors_aux>:
8048510: 55 push %ebp
8048511: 89 e5 mov %esp,%ebp
8048513: 53 push %ebx
8048514: 83 ec 04 sub $0x4,%esp
8048517: a1 dc 95 04 08 mov 0x80495dc,%eax
804851c: 83 f8 ff cmp $0xffffffff,%eax
804851f: 74 12 je 8048533 <__do_global_ctors_aux+0x23>
8048521: 31 db xor %ebx,%ebx
8048523: ff d0 call *%eax
8048525: 8b 83 d8 95 04 08 mov 0x80495d8(%ebx),%eax
804852b: 83 eb 04 sub $0x4,%ebx
804852e: 83 f8 ff cmp $0xffffffff,%eax
8048531: 75 f0 jne 8048523 <__do_global_ctors_aux+0x13>
8048533: 83 c4 04 add $0x4,%esp
8048536: 5b pop %ebx
8048537: 5d pop %ebp
8048538: c3 ret
8048539: 90 nop
804853a: 90 nop
804853b: 90 nop
Disassembly of section .fini:
0804853c <_fini>:
804853c: 55 push %ebp
804853d: 89 e5 mov %esp,%ebp
804853f: 53 push %ebx
8048540: 83 ec 04 sub $0x4,%esp
8048543: e8 00 00 00 00 call 8048548 <_fini+0xc>
8048548: 5b pop %ebx
8048549: 81 c3 94 11 00 00 add $0x1194,%ebx
804854f: e8 ac fe ff ff call 8048400 <__do_global_dtors_aux>
8048554: 59 pop %ecx
8048555: 5b pop %ebx
8048556: c9 leave
8048557: c3 ret
Disassembly of section .init:
08048348 <_init>:
8048348: 55 push %ebp
8048349: 89 e5 mov %esp,%ebp
804834b: 53 push %ebx
804834c: 83 ec 04 sub $0x4,%esp
804834f: e8 00 00 00 00 call 8048354 <_init+0xc>
8048354: 5b pop %ebx
8048355: 81 c3 88 13 00 00 add $0x1388,%ebx
804835b: 8b 93 fc ff ff ff mov -0x4(%ebx),%edx
8048361: 85 d2 test %edx,%edx
8048363: 74 05 je 804836a <_init+0x22>
8048365: e8 1e 00 00 00 call 8048388 <__gmon_start__@plt>
804836a: e8 c1 00 00 00 call 8048430 <frame_dummy>
804836f: e8 9c 01 00 00 call 8048510 <__do_global_ctors_aux>
8048374: 58 pop %eax
8048375: 5b pop %ebx
8048376: c9 leave
8048377: c3 ret
Disassembly of section .plt:
08048378 <__gmon_start__@plt-0x10>:
8048378: ff 35 e0 96 04 08 pushl 0x80496e0
804837e: ff 25 e4 96 04 08 jmp *0x80496e4
8048384: 00 00 add %al,(%eax)
...
08048388 <__gmon_start__@plt>:
8048388: ff 25 e8 96 04 08 jmp *0x80496e8
804838e: 68 00 00 00 00 push $0x0
8048393: e9 e0 ff ff ff jmp 8048378 <_init+0x30>
08048398 <__libc_start_main@plt>:
8048398: ff 25 ec 96 04 08 jmp *0x80496ec
804839e: 68 08 00 00 00 push $0x8
80483a3: e9 d0 ff ff ff jmp 8048378 <_init+0x30>
080483a8 <puts@plt>:
80483a8: ff 25 f0 96 04 08 jmp *0x80496f0
80483ae: 68 10 00 00 00 push $0x10
80483b3: e9 c0 ff ff ff jmp 8048378 <_init+0x30>
080483b8 <__gxx_personality_v0@plt>:
80483b8: ff 25 f4 96 04 08 jmp *0x80496f4
80483be: 68 18 00 00 00 push $0x18
80483c3: e9 b0 ff ff ff jmp 8048378 <_init+0x30>
Disassembly of section .text:
080483d0 <_start>:
80483d0: 31 ed xor %ebp,%ebp
80483d2: 5e pop %esi
80483d3: 89 e1 mov %esp,%ecx
80483d5: 83 e4 f0 and $0xfffffff0,%esp
80483d8: 50 push %eax
80483d9: 54 push %esp
80483da: 52 push %edx
80483db: 68 a0 84 04 08 push $0x80484a0
80483e0: 68 b0 84 04 08 push $0x80484b0
80483e5: 51 push %ecx
80483e6: 56 push %esi
80483e7: 68 54 84 04 08 push $0x8048454
80483ec: e8 a7 ff ff ff call 8048398 <__libc_start_main@plt>
80483f1: f4 hlt
80483f2: 90 nop
80483f3: 90 nop
80483f4: 90 nop
80483f5: 90 nop
80483f6: 90 nop
80483f7: 90 nop
80483f8: 90 nop
80483f9: 90 nop
80483fa: 90 nop
80483fb: 90 nop
80483fc: 90 nop
80483fd: 90 nop
80483fe: 90 nop
80483ff: 90 nop
08048400 <__do_global_dtors_aux>:
8048400: 55 push %ebp
8048401: 89 e5 mov %esp,%ebp
8048403: 83 ec 08 sub $0x8,%esp
8048406: 80 3d 04 97 04 08 00 cmpb $0x0,0x8049704
804840d: 74 0c je 804841b <__do_global_dtors_aux+0x1b>
804840f: eb 1c jmp 804842d <__do_global_dtors_aux+0x2d>
8048411: 83 c0 04 add $0x4,%eax
8048414: a3 00 97 04 08 mov %eax,0x8049700
8048419: ff d2 call *%edx
804841b: a1 00 97 04 08 mov 0x8049700,%eax
8048420: 8b 10 mov (%eax),%edx
8048422: 85 d2 test %edx,%edx
8048424: 75 eb jne 8048411 <__do_global_dtors_aux+0x11>
8048426: c6 05 04 97 04 08 01 movb $0x1,0x8049704
804842d: c9 leave
804842e: c3 ret
804842f: 90 nop
08048430 <frame_dummy>:
8048430: 55 push %ebp
8048431: 89 e5 mov %esp,%ebp
8048433: 83 ec 08 sub $0x8,%esp
8048436: a1 ec 95 04 08 mov 0x80495ec,%eax
804843b: 85 c0 test %eax,%eax
804843d: 74 12 je 8048451 <frame_dummy+0x21>
804843f: b8 00 00 00 00 mov $0x0,%eax
8048444: 85 c0 test %eax,%eax
8048446: 74 09 je 8048451 <frame_dummy+0x21>
8048448: c7 04 24 ec 95 04 08 movl $0x80495ec,(%esp)
804844f: ff d0 call *%eax
8048451: c9 leave
8048452: c3 ret
8048453: 90 nop
08048454 <main>:
#include <stdio.h>
int main()
8048454: 8d 4c 24 04 lea 0x4(%esp),%ecx
8048458: 83 e4 f0 and $0xfffffff0,%esp
804845b: ff 71 fc pushl -0x4(%ecx)
804845e: 55 push %ebp
804845f: 89 e5 mov %esp,%ebp
8048461: 51 push %ecx
8048462: 83 ec 14 sub $0x14,%esp
{
int i = 0;
8048465: c7 45 f8 00 00 00 00 movl $0x0,-0x8(%ebp)
for (i = 0; i < 5; i ++ )
804846c: c7 45 f8 00 00 00 00 movl $0x0,-0x8(%ebp)
8048473: eb 10 jmp 8048485 <main+0x31>
{
printf("Hello World\n");
8048475: c7 04 24 60 85 04 08 movl $0x8048560,(%esp)
804847c: e8 27 ff ff ff call 80483a8 <puts@plt>
int main()
{
int i = 0;
for (i = 0; i < 5; i ++ )
8048481: 83 45 f8 01 addl $0x1,-0x8(%ebp)
8048485: 83 7d f8 04 cmpl $0x4,-0x8(%ebp)
8048489: 7e ea jle 8048475 <main+0x21>
{
printf("Hello World\n");
}
return 0;
804848b: b8 00 00 00 00 mov $0x0,%eax
}
8048490: 83 c4 14 add $0x14,%esp
8048493: 59 pop %ecx
8048494: 5d pop %ebp
8048495: 8d 61 fc lea -0x4(%ecx),%esp
8048498: c3 ret
8048499: 90 nop
804849a: 90 nop
804849b: 90 nop
804849c: 90 nop
804849d: 90 nop
804849e: 90 nop
804849f: 90 nop
080484a0 <__libc_csu_fini>:
80484a0: 55 push %ebp
80484a1: 89 e5 mov %esp,%ebp
80484a3: 5d pop %ebp
80484a4: c3 ret
80484a5: 8d 74 26 00 lea 0x0(%esi),%esi
80484a9: 8d bc 27 00 00 00 00 lea 0x0(%edi),%edi
080484b0 <__libc_csu_init>:
80484b0: 55 push %ebp
80484b1: 89 e5 mov %esp,%ebp
80484b3: 57 push %edi
80484b4: 56 push %esi
80484b5: 53 push %ebx
80484b6: e8 4f 00 00 00 call 804850a <__i686.get_pc_thunk.bx>
80484bb: 81 c3 21 12 00 00 add $0x1221,%ebx
80484c1: 83 ec 0c sub $0xc,%esp
80484c4: e8 7f fe ff ff call 8048348 <_init>
80484c9: 8d bb 00 ff ff ff lea -0x100(%ebx),%edi
80484cf: 8d 83 00 ff ff ff lea -0x100(%ebx),%eax
80484d5: 29 c7 sub %eax,%edi
80484d7: c1 ff 02 sar $0x2,%edi
80484da: 85 ff test %edi,%edi
80484dc: 74 24 je 8048502 <__libc_csu_init+0x52>
80484de: 31 f6 xor %esi,%esi
80484e0: 8b 45 10 mov 0x10(%ebp),%eax
80484e3: 89 44 24 08 mov %eax,0x8(%esp)
80484e7: 8b 45 0c mov 0xc(%ebp),%eax
80484ea: 89 44 24 04 mov %eax,0x4(%esp)
80484ee: 8b 45 08 mov 0x8(%ebp),%eax
80484f1: 89 04 24 mov %eax,(%esp)
80484f4: ff 94 b3 00 ff ff ff call *-0x100(%ebx,%esi,4)
80484fb: 83 c6 01 add $0x1,%esi
80484fe: 39 f7 cmp %esi,%edi
8048500: 75 de jne 80484e0 <__libc_csu_init+0x30>
8048502: 83 c4 0c add $0xc,%esp
8048505: 5b pop %ebx
8048506: 5e pop %esi
8048507: 5f pop %edi
8048508: 5d pop %ebp
8048509: c3 ret
0804850a <__i686.get_pc_thunk.bx>:
804850a: 8b 1c 24 mov (%esp),%ebx
804850d: c3 ret
804850e: 90 nop
804850f: 90 nop
08048510 <__do_global_ctors_aux>:
8048510: 55 push %ebp
8048511: 89 e5 mov %esp,%ebp
8048513: 53 push %ebx
8048514: 83 ec 04 sub $0x4,%esp
8048517: a1 dc 95 04 08 mov 0x80495dc,%eax
804851c: 83 f8 ff cmp $0xffffffff,%eax
804851f: 74 12 je 8048533 <__do_global_ctors_aux+0x23>
8048521: 31 db xor %ebx,%ebx
8048523: ff d0 call *%eax
8048525: 8b 83 d8 95 04 08 mov 0x80495d8(%ebx),%eax
804852b: 83 eb 04 sub $0x4,%ebx
804852e: 83 f8 ff cmp $0xffffffff,%eax
8048531: 75 f0 jne 8048523 <__do_global_ctors_aux+0x13>
8048533: 83 c4 04 add $0x4,%esp
8048536: 5b pop %ebx
8048537: 5d pop %ebp
8048538: c3 ret
8048539: 90 nop
804853a: 90 nop
804853b: 90 nop
Disassembly of section .fini:
0804853c <_fini>:
804853c: 55 push %ebp
804853d: 89 e5 mov %esp,%ebp
804853f: 53 push %ebx
8048540: 83 ec 04 sub $0x4,%esp
8048543: e8 00 00 00 00 call 8048548 <_fini+0xc>
8048548: 5b pop %ebx
8048549: 81 c3 94 11 00 00 add $0x1194,%ebx
804854f: e8 ac fe ff ff call 8048400 <__do_global_dtors_aux>
8048554: 59 pop %ecx
8048555: 5b pop %ebx
8048556: c9 leave
8048557: c3 ret
Reference
- http://24alpha.wordpress.com/2007/12/18/how-to-get-gcc-to-interleave-assembly-output-with-original-source-code/
