elf/ifuncmod5.c

   1 /* Test STT_GNU_IFUNC symbols without direct function call.  */
   2
   3 extern int global;
   4
   5 static int
   6 one (void)
   7 {
   8   return 1;
   9 }
  10
  11 static int
  12 minus_one (void)
  13 {
  14   return -1;
  15 }
  16
  17 static int
  18 zero (void)
  19 {
  20   return 0;
  21 }
  22
  23 void * foo_ifunc (void) __asm__ ("foo");
  24 __asm__(".type foo, %gnu_indirect_function");
  25
  26 void *
  27 foo_ifunc (void)
  28 {
  29   switch (global)
  30     {
  31     case 1:
  32       return one;
  33     case -1:
  34       return minus_one;
  35     default:
  36       return zero;
  37     }
  38 }
  39
  40 void * foo_hidden_ifunc (void) __asm__ ("foo_hidden");
  41 __asm__(".type foo_hidden, %gnu_indirect_function");
  42
  43 void *
  44 foo_hidden_ifunc (void)
  45 {
  46   switch (global)
  47     {
  48     case 1:
  49       return minus_one;
  50     case -1:
  51       return one;
  52     default:
  53       return zero;
  54     }
  55 }
  56
  57 void * foo_protected_ifunc (void) __asm__ ("foo_protected");
  58 __asm__(".type foo_protected, %gnu_indirect_function");
  59
  60 void *
  61 foo_protected_ifunc (void)
  62 {
  63   switch (global)
  64     {
  65     case 1:
  66       return one;
  67     case -1:
  68       return zero;
  69     default:
  70       return minus_one;
  71     }
  72 }
  73
  74 /* Test hidden indirect function.  */
  75 __asm__(".hidden foo_hidden");
  76
  77 /* Test protected indirect function.  */
  78 __asm__(".protected foo_protected");