1 /* { dg-do run { target i?86-*-* x86_64-*-* } } */ 2 /* { dg-skip-if "PR81693 sp not aligned to 16 bytes" { "*-*-darwin*" } } */ 3 /* { dg-options "-mgeneral-regs-only" } */ 4 5 extern void exit (int); 6 7 typedef unsigned int uword_t __attribute__ ((mode (__word__))); 8 9 #define IP 0x12345671 10 #define CS 0x12345672 11 #define FLAGS 0x12345673 12 #define SP 0x12345674 13 #define SS 0x12345675 14 15 #define STRING(x) XSTRING(x) 16 #define XSTRING(x) #x 17 #define ASMNAME(cname) ASMNAME2 (__USER_LABEL_PREFIX__, cname) 18 #define ASMNAME2(prefix, cname) XSTRING (prefix) cname 19 20 struct interrupt_frame 21 { 22 uword_t ip; 23 uword_t cs; 24 uword_t flags; 25 uword_t sp; 26 uword_t ss; 27 }; 28 29 __attribute__((naked, used)) 30 void fn(void)31fn (void) 32 { 33 register uword_t *sp __asm__("sp"); 34 struct interrupt_frame *frame = (struct interrupt_frame *) sp; 35 if (IP != frame->ip) /* BREAK */ 36 __builtin_abort (); 37 if (CS != frame->cs) 38 __builtin_abort (); 39 if (FLAGS != frame->flags) 40 __builtin_abort (); 41 if (SP != frame->sp) 42 __builtin_abort (); 43 if (SS != frame->ss) 44 __builtin_abort (); 45 46 exit (0); 47 } 48 49 int main()50main () 51 { 52 asm ("push $" STRING (SS) "; \ 53 push $" STRING (SP) "; \ 54 push $" STRING (FLAGS) "; \ 55 push $" STRING (CS) "; \ 56 push $" STRING (IP) "; \ 57 jmp " ASMNAME ("fn")); 58 return 0; 59 } 60