gold/testsuite/ifuncmod1.c

   1 /* Test STT_GNU_IFUNC symbols:
   2
   3    1. Direct function call.
   4    2. Function pointer.
   5    3. Visibility.
   6  */
   7 #include "ifunc-sel.h"
   8
   9 int global __attribute__ ((visibility ("protected"))) = -1;
  10
  11 static int
  12 one (void)
  13 {
  14   return 1;
  15 }
  16
  17 static int
  18 minus_one (void)
  19 {
  20   return -1;
  21 }
  22
  23 static int
  24 zero (void)
  25 {
  26   return 0;
  27 }
  28
  29 void * foo_ifunc (void) __asm__ ("foo");
  30 __asm__(".type foo, %gnu_indirect_function");
  31
  32 void *
  33 foo_ifunc (void)
  34 {
  35   return ifunc_sel (one, minus_one, zero);
  36 }
  37
  38 void * foo_hidden_ifunc (void) __asm__ ("foo_hidden");
  39 __asm__(".type foo_hidden, %gnu_indirect_function");
  40
  41 void *
  42 foo_hidden_ifunc (void)
  43 {
  44   return ifunc_sel (minus_one, one, zero);
  45 }
  46
  47 void * foo_protected_ifunc (void) __asm__ ("foo_protected");
  48 __asm__(".type foo_protected, %gnu_indirect_function");
  49
  50 void *
  51 foo_protected_ifunc (void)
  52 {
  53   return ifunc_sel (one, zero, minus_one);
  54 }
  55
  56 /* Test hidden indirect function.  */
  57 __asm__(".hidden foo_hidden");
  58
  59 /* Test protected indirect function.  */
  60 __asm__(".protected foo_protected");
  61
  62 extern int foo (void);
  63 extern int foo_hidden (void);
  64 extern int foo_protected (void);
  65 extern int ret_foo;
  66 extern int ret_foo_hidden;
  67 extern int ret_foo_protected;
  68
  69 #define FOO_P
  70 typedef int (*foo_p) (void);
  71
  72 extern foo_p get_foo_p (void);
  73 extern foo_p get_foo_hidden_p (void);
  74 extern foo_p get_foo_protected_p (void);
  75
  76 foo_p
  77 get_foo_p (void)
  78 {
  79   ret_foo = foo ();
  80   return foo;
  81 }
  82
  83 foo_p
  84 get_foo_hidden_p (void)
  85 {
  86   ret_foo_hidden = foo_hidden ();
  87   return foo_hidden;
  88 }
  89
  90 foo_p
  91 get_foo_protected_p (void)
  92 {
  93   ret_foo_protected = foo_protected ();
  94   return foo_protected;
  95 }