gold/testsuite/ifuncmain7.c

   1 /* Test local STT_GNU_IFUNC symbols:
   2
   3    1. Direct function call.
   4    2. Function pointer.
   5  */
   6
   7 #include <stdlib.h>
   8 #include "ifunc-sel.h"
   9
  10 extern int foo (void);
  11
  12 static int
  13 one (void)
  14 {
  15   return -30;
  16 }
  17
  18 static void * __attribute__ ((used)) foo_ifunc (void) __asm__ ("foo");
  19 __asm__(".type foo, %gnu_indirect_function");
  20
  21 static void *
  22 __attribute__ ((used))
  23 foo_ifunc (void)
  24 {
  25   return ifunc_one (one);
  26 }
  27
  28 typedef int (*foo_p) (void);
  29
  30 extern foo_p __attribute__ ((noinline)) get_foo_p (void);
  31 extern foo_p __attribute__ ((noinline)) get_foo (void);
  32
  33 foo_p foo_ptr = foo;
  34
  35 foo_p
  36 __attribute__ ((noinline))
  37 get_foo_p (void)
  38 {
  39   return foo_ptr;
  40 }
  41
  42 foo_p
  43 __attribute__ ((noinline))
  44 get_foo (void)
  45 {
  46   return foo;
  47 }
  48
  49 int
  50 main (void)
  51 {
  52   foo_p p;
  53
  54   p = get_foo ();
  55   if (p != foo)
  56     abort ();
  57   if ((*p) () != -30)
  58     abort ();
  59
  60   p = get_foo_p ();
  61   if (p != foo)
  62     abort ();
  63   if ((*p) () != -30)
  64     abort ();
  65
  66   if (foo_ptr != foo)
  67     abort ();
  68   if ((*foo_ptr) () != -30)
  69     abort ();
  70   if (foo () != -30)
  71     abort ();
  72
  73   return 0;
  74 }