elf/ifuncmod5.c

   1 /* Test STT_GNU_IFUNC symbols without direct function call.  */
   2 #include "ifunc-sel.h"
   3
   4 int global = -1;
   5 /* Can't use __attribute__((visibility("protected"))) until the GCC bug:
   6
   7    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248
   8
   9    is fixed.  */
  10 asm (".protected global");
  11
  12 static int
  13 one (void)
  14 {
  15   return 1;
  16 }
  17
  18 static int
  19 minus_one (void)
  20 {
  21   return -1;
  22 }
  23
  24 static int
  25 zero (void)
  26 {
  27   return 0;
  28 }
  29
  30 void * foo_ifunc (void) __asm__ ("foo");
  31 __asm__(".type foo, %gnu_indirect_function");
  32
  33 void *
  34 foo_ifunc (void)
  35 {
  36   return ifunc_sel (one, minus_one, zero);
  37 }
  38
  39 void * foo_hidden_ifunc (void) __asm__ ("foo_hidden");
  40 __asm__(".type foo_hidden, %gnu_indirect_function");
  41
  42 void *
  43 foo_hidden_ifunc (void)
  44 {
  45   return ifunc_sel (minus_one, one, zero);
  46 }
  47
  48 void * foo_protected_ifunc (void) __asm__ ("foo_protected");
  49 __asm__(".type foo_protected, %gnu_indirect_function");
  50
  51 void *
  52 foo_protected_ifunc (void)
  53 {
  54   return ifunc_sel (one, zero, minus_one);
  55 }
  56
  57 /* Test hidden indirect function.  */
  58 __asm__(".hidden foo_hidden");
  59
  60 /* Test protected indirect function.  */
  61 __asm__(".protected foo_protected");