Viewing file:  ms_hook_prologue.c (1.13 KB) -rw-r--r--
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/* Test that the ms_hook_prologue attribute generates the correct code. */
/* { dg-do run } */
/* { dg-require-effective-target ms_hook_prologue } */
/* { dg-options "-O2 -fomit-frame-pointer" } */
#include <stdio.h>
int __attribute__ ((__ms_hook_prologue__)) foo ()
{
unsigned char *ptr = (unsigned char *) foo;
/* The NOP mov must not be optimized away by optimizations.
The push %ebp, mov %esp, %ebp must not be removed by
-fomit-frame-pointer */
#ifndef __x86_64__
/* movl.s %edi, %edi */
if(*ptr++ != 0x8b) return 1;
if(*ptr++ != 0xff) return 1;
/* push %ebp */
if(*ptr++ != 0x55) return 1;
/* movl.s %esp, %ebp */
if(*ptr++ != 0x8b) return 1;
if(*ptr++ != 0xec) return 1;
#else
/* leaq 0(%rsp), %rsp */
if (*ptr++ != 0x48) return 1;
if (*ptr++ != 0x8d) return 1;
if (*ptr++ != 0xa4) return 1;
if (*ptr++ != 0x24) return 1;
if (ptr[0] != 0 || ptr[1] != 0 || ptr[2] != 0 || ptr[3] != 0)
return 1;
#endif
return 0;
}
unsigned int __attribute__ ((noinline, __ms_hook_prologue__)) test_func()
{
static int value;
if (value++) puts("");
return 0;
}
int main ()
{
return foo() || test_func();
}
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