How to know some info?

[johncaponski]

Hi everyone! I've got an AT&T GNU assembler code produced by the compilation
of a C programme that I don't know. I need to answer some cuestions about
it. The thing is that I want to know how could I get that information using
gcc compiler, I mean, I just want to know the options I should use with gcc
and "myfile.s" to get that info.

The cuestions are:

- What architecture was this code compiled for?
- 32 or 64 bits?

In addition to that, I am asked to write the C programme that generated that
code. Is there any automatic way to do that?
This is the code:

       .file "practica2_funcion.c"
       .text
       .p2align 4,,15
.globl funcion
       .type funcion, @function
funcion:
       pushl %ebp
       movl    %esp, %ebp
       pushl %esi
       xorl    %esi, %esi
       pushl %ebx
       .p2align 4,,7
       .p2align 3
.L2:
       leal    matriz(,%esi,4), %eax
       xorl    %ecx, %ecx
       .p2align 4,,7
       .p2align 3
.L3:
       movl    (%eax), %ebx
       addl    $512, %ecx
       leal    0(,%ebx,8), %edx
       subl    %ebx, %edx
       movl    %edx, (%eax)
       addl    $512, %eax
       cmpl    $65536, %ecx
       jne     .L3
       addl    $1, %esi
       cmpl    $128, %esi
       jne     .L2
       popl    %ebx
       popl    %esi
       popl    %ebp
       ret
       .size funcion, .­-funcion
       .comm matriz,65536,32
       .ident "GCC: (Debian 4.4.1­4) 4.4.1"
                       .section      .note.GNU­stack,"",@progbits



Thank you in advance!

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