gcc/testsuite/gcc.target/powerpc/spe-unwind-1.c

   1 /* Verify that unwinding can find SPE registers in signal frames.  */
   2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   3 /* { dg-do run { target { powerpc*-*-linux* && powerpc_spe } } } */
   4 /* { dg-options "-fexceptions -fnon-call-exceptions -O2" } */
   5
   6 #include <unwind.h>
   7 #include <stdlib.h>
   8 #include <signal.h>
   9 #include <string.h>
  10
  11 int count;
  12 char *null;
  13 int found_reg;
  14
  15 typedef int v2si __attribute__((__vector_size__(8)));
  16
  17 v2si v1 = { 123, 234 };
  18 v2si v2 = { 345, 456 };
  19
  20 static _Unwind_Reason_Code
  21 force_unwind_stop (int version, _Unwind_Action actions,
  22                    _Unwind_Exception_Class exc_class,
  23                    struct _Unwind_Exception *exc_obj,
  24                    struct _Unwind_Context *context,
  25                    void *stop_parameter)
  26 {
  27   unsigned int reg;
  28   if (actions & _UA_END_OF_STACK)
  29     abort ();
  30   if (_Unwind_GetGR (context, 1215) == 123)
  31     found_reg = 1;
  32   return _URC_NO_REASON;
  33 }
  34
  35 static void force_unwind ()
  36 {
  37   struct _Unwind_Exception *exc = malloc (sizeof (*exc));
  38   memset (&exc->exception_class, 0, sizeof (exc->exception_class));
  39   exc->exception_cleanup = 0;
  40
  41 #ifndef __USING_SJLJ_EXCEPTIONS__
  42   _Unwind_ForcedUnwind (exc, force_unwind_stop, 0);
  43 #else
  44   _Unwind_SjLj_ForcedUnwind (exc, force_unwind_stop, 0);
  45 #endif
  46
  47   abort ();
  48 }
  49
  50 static void counter (void *p __attribute__((unused)))
  51 {
  52   ++count;
  53 }
  54
  55 static void handler (void *p __attribute__((unused)))
  56 {
  57   if (count != 2)
  58     abort ();
  59   if (!found_reg)
  60     abort ();
  61   exit (0);
  62 }
  63
  64 static int __attribute__((noinline)) fn5 ()
  65 {
  66   char dummy __attribute__((cleanup (counter)));
  67   force_unwind ();
  68   return 0;
  69 }
  70
  71 static void fn4 (int sig)
  72 {
  73   char dummy __attribute__((cleanup (counter)));
  74   /* Clobber high part without compiler's knowledge so the only saved
  75      copy is from the signal frame.  */
  76   asm volatile ("evmergelo 15,15,15");
  77   fn5 ();
  78   null = NULL;
  79 }
  80
  81 static void fn3 ()
  82 {
  83   abort ();
  84 }
  85
  86 static int __attribute__((noinline)) fn2 ()
  87 {
  88   register v2si r15 asm("r15");
  89   r15 = v1;
  90   asm volatile ("" : "+r" (r15));
  91   *null = 0;
  92   fn3 ();
  93   return 0;
  94 }
  95
  96 static int __attribute__((noinline)) fn1 ()
  97 {
  98   signal (SIGSEGV, fn4);
  99   signal (SIGBUS, fn4);
 100   fn2 ();
 101   return 0;
 102 }
 103
 104 static int __attribute__((noinline)) fn0 ()
 105 {
 106   char dummy __attribute__((cleanup (handler)));
 107   fn1 ();
 108   null = 0;
 109   return 0;
 110 }
 111
 112 int main()
 113 {
 114   fn0 ();
 115   abort ();
 116 }