1 .global sys32_helper 2 sys32_helper: 3 /* Args: syscall_args_32*, function pointer */ 4 pushl %ebp 5 pushl %ebx 6 pushl %esi 7 pushl %edi 8 movl 5*4(%esp), %eax /* pointer to args struct */ 9 10 movl 1*4(%eax), %ebx 11 movl 2*4(%eax), %ecx 12 movl 3*4(%eax), %edx 13 movl 4*4(%eax), %esi 14 movl 5*4(%eax), %edi 15 movl 6*4(%eax), %ebp 16 movl 0*4(%eax), %eax 17 18 call *(6*4)(%esp) /* Do the syscall */ 19 20 /* Now we need to recover without losing any reg values */ 21 pushl %eax 22 movl 6*4(%esp), %eax 23 popl 0*4(%eax) 24 movl %ebx, 1*4(%eax) 25 movl %ecx, 2*4(%eax) 26 movl %edx, 3*4(%eax) 27 movl %esi, 4*4(%eax) 28 movl %edi, 5*4(%eax) 29 movl %ebp, 6*4(%eax) 30 31 popl %edi 32 popl %esi 33 popl %ebx 34 popl %ebp 35 ret 36 37 .type sys32_helper, @function 38 .size sys32_helper, .-sys32_helper 39 40 .global int80_and_ret 41 int80_and_ret: 42 int $0x80 43 ret 44 45 .type int80_and_ret, @function 46 .size int80_and_ret, .-int80_and_ret 47
