helper #1

h1.S

.section .text
.globl le32_to_be32
.type le32_to_be32, @function
le32_to_be32:
    pushl %ebp
    movl  %esp, %ebp
    subl  $0x14, %esp
    pushl %ebx
    pushl %ecx
    pushl %edx
    pushl %edi
    pushl %esi
    movl  0x08(%ebp), %ebx
    xorl  %edx, %edx
    xorl  %edi, %edi
    movb  %bl, %dl
    shll  $0x18, %edx
    orl   %edx, %edi
    xorl  %edx, %edx
    movb  %bh, %dl
    shll  $0x10, %edx
    orl   %edx, %edi
    shrl  $0x10, %ebx
    xorl  %edx, %edx
    movb  %bl, %dl
    shll  $0x08, %edx
    orl   %edx, %edi
    xorl  %edx, %edx
    movb  %bh, %dl
    orl   %edx, %edi
    movl  %edi, %eax
    popl  %esi
    popl  %edi
    popl  %edx
    popl  %ecx
    popl  %ebx
    addl  $0x14, %esp
    popl  %ebp
    ret

.globl _start
_start:
    movl  $0x11223344, %ebx
    int3
    subl  $0x04, %esp
    pushl %ebx
    call  le32_to_be32
    popl  %ebx
    addl  $0x04, %esp
    movl  %eax, %ebx
    int3
    nop
    nop
    nop
    nop