elf/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 * 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 foo_p foo_ptr = foo;
  31
  32 foo_p
  33 __attribute__ ((noinline))
  34 get_foo_p (void)
  35 {
  36   return foo_ptr;
  37 }
  38
  39 foo_p
  40 __attribute__ ((noinline))
  41 get_foo (void)
  42 {
  43   return foo;
  44 }
  45
  46 int
  47 main (void)
  48 {
  49   foo_p p;
  50
  51   p = get_foo ();
  52   if (p != foo)
  53     abort ();
  54   if ((*p) () != -30)
  55     abort ();
  56
  57   p = get_foo_p ();
  58   if (p != foo)
  59     abort ();
  60   if ((*p) () != -30)
  61     abort ();
  62
  63   if (foo_ptr != foo)
  64     abort ();
  65   if ((*foo_ptr) () != -30)
  66     abort ();
  67   if (foo () != -30)
  68     abort ();
  69
  70   return 0;
  71 }