1/* Test that the ms_hook_prologue attribute generates the correct code. */ 2 3/* { dg-do run } */ 4/* { dg-require-effective-target ms_hook_prologue } */ 5/* { dg-options "-O2 -fomit-frame-pointer" } */ 6 7int __attribute__ ((__ms_hook_prologue__)) foo () 8{ 9 unsigned char *ptr = (unsigned char *) foo; 10 11 /* The NOP mov must not be optimized away by optimizations. 12 The push %ebp, mov %esp, %ebp must not be removed by 13 -fomit-frame-pointer */ 14 15 /* movl.s %edi, %edi */ 16 if(*ptr++ != 0x8b) return 1; 17 if(*ptr++ != 0xff) return 1; 18 /* push %ebp */ 19 if(*ptr++ != 0x55) return 1; 20 /* movl.s %esp, %ebp */ 21 if(*ptr++ != 0x8b) return 1; 22 if(*ptr++ != 0xec) return 1; 23 return 0; 24} 25 26int main () 27{ 28 return foo(); 29} 30