GCCインラインアセンブラでスタックを見る

gistfile1.txt

$ gcc -masm=intel inlineasm.c

$ ./a.out
saved_ebp = 0
saved_eip = b7e444d3
argc = 1
argv = bffff864
envp = bffff86c

$ objdump -d a.out | sed -n '/<main>:/,/^$/p'
080483e4 <main>:
 80483e4:       55                      push   ebp
 80483e5:       89 e5                   mov    ebp,esp
 80483e7:       57                      push   edi
 80483e8:       56                      push   esi
 80483e9:       53                      push   ebx
 80483ea:       83 e4 f0                and    esp,0xfffffff0
 80483ed:       83 ec 40                sub    esp,0x40
 80483f0:       8b 75 00                mov    esi,DWORD PTR [ebp+0x0]
 80483f3:       8b 5d 04                mov    ebx,DWORD PTR [ebp+0x4]
 80483f6:       8b 4d 08                mov    ecx,DWORD PTR [ebp+0x8]
 80483f9:       8b 55 0c                mov    edx,DWORD PTR [ebp+0xc]
 80483fc:       8b 45 10                mov    eax,DWORD PTR [ebp+0x10]
 80483ff:       89 74 24 2c             mov    DWORD PTR [esp+0x2c],esi
 8048403:       89 5c 24 30             mov    DWORD PTR [esp+0x30],ebx
 8048407:       89 4c 24 34             mov    DWORD PTR [esp+0x34],ecx
 804840b:       89 54 24 38             mov    DWORD PTR [esp+0x38],edx
 804840f:       89 44 24 3c             mov    DWORD PTR [esp+0x3c],eax
 8048413:       8b 7c 24 3c             mov    edi,DWORD PTR [esp+0x3c]
 8048417:       8b 74 24 38             mov    esi,DWORD PTR [esp+0x38]
 804841b:       8b 5c 24 34             mov    ebx,DWORD PTR [esp+0x34]
 804841f:       8b 4c 24 30             mov    ecx,DWORD PTR [esp+0x30]
 8048423:       8b 54 24 2c             mov    edx,DWORD PTR [esp+0x2c]
 8048427:       b8 30 85 04 08          mov    eax,0x8048530
 804842c:       89 7c 24 14             mov    DWORD PTR [esp+0x14],edi
 8048430:       89 74 24 10             mov    DWORD PTR [esp+0x10],esi
 8048434:       89 5c 24 0c             mov    DWORD PTR [esp+0xc],ebx
 8048438:       89 4c 24 08             mov    DWORD PTR [esp+0x8],ecx
 804843c:       89 54 24 04             mov    DWORD PTR [esp+0x4],edx
 8048440:       89 04 24                mov    DWORD PTR [esp],eax
 8048443:       e8 b8 fe ff ff          call   8048300 <printf@plt>
 8048448:       b8 00 00 00 00          mov    eax,0x0
 804844d:       8d 65 f4                lea    esp,[ebp-0xc]
 8048450:       5b                      pop    ebx
 8048451:       5e                      pop    esi
 8048452:       5f                      pop    edi
 8048453:       5d                      pop    ebp
 8048454:       c3                      ret

inlineasm.c

#include <stdio.h>

int main()
{
    unsigned int x[5];

    __asm__("mov %0, [ebp]\n"
            "mov %1, [ebp+4]\n"
            "mov %2, [ebp+8]\n"
            "mov %3, [ebp+12]\n"
            "mov %4, [ebp+16]\n"
            : "=r" (x[0]), "=r" (x[1]), "=r" (x[2]), "=r" (x[3]), "=r" (x[4])
            );

    printf("saved_ebp = %x\n"
           "saved_eip = %x\n"
           "argc = %x\n"
           "argv = %x\n"
           "envp = %x\n"
           , x[0], x[1], x[2], x[3], x[4]);

    return 0;
}