101 lines
1.6 KiB
C
101 lines
1.6 KiB
C
|
/* Test STT_GNU_IFUNC symbols:
|
||
|
|
|
||
|
|
1. Direct function call.
|
||
|
|
2. Function pointer.
|
||
|
|
3. Visibility.
|
||
|
|
*/
|
||
|
|
#include "ifunc-sel.h"
|
||
|
|
|
||
|
|
int global = -1;
|
||
|
|
/* Can't use __attribute__((visibility("protected"))) until the GCC bug:
|
||
|
|
|
||
|
|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248
|
||
|
|
|
||
|
|
is fixed. */
|
||
|
|
asm (".protected global");
|
||
|
|
|
||
|
|
static int
|
||
|
|
one (void)
|
||
|
|
{
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
minus_one (void)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
zero (void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void * foo_ifunc (void) __asm__ ("foo");
|
||
|
|
__asm__(".type foo, %gnu_indirect_function");
|
||
|
|
|
||
|
|
void *
|
||
|
|
inhibit_stack_protector
|
||
|
|
foo_ifunc (void)
|
||
|
|
{
|
||
|
|
return ifunc_sel (one, minus_one, zero);
|
||
|
|
}
|
||
|
|
|
||
|
|
void * foo_hidden_ifunc (void) __asm__ ("foo_hidden");
|
||
|
|
__asm__(".type foo_hidden, %gnu_indirect_function");
|
||
|
|
|
||
|
|
void *
|
||
|
|
inhibit_stack_protector
|
||
|
|
foo_hidden_ifunc (void)
|
||
|
|
{
|
||
|
|
return ifunc_sel (minus_one, one, zero);
|
||
|
|
}
|
||
|
|
|
||
|
|
void * foo_protected_ifunc (void) __asm__ ("foo_protected");
|
||
|
|
__asm__(".type foo_protected, %gnu_indirect_function");
|
||
|
|
|
||
|
|
void *
|
||
|
|
inhibit_stack_protector
|
||
|
|
foo_protected_ifunc (void)
|
||
|
|
{
|
||
|
|
return ifunc_sel (one, zero, minus_one);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test hidden indirect function. */
|
||
|
|
__asm__(".hidden foo_hidden");
|
||
|
|
|
||
|
|
/* Test protected indirect function. */
|
||
|
|
__asm__(".protected foo_protected");
|
||
|
|
|
||
|
|
extern int foo (void);
|
||
|
|
extern int foo_hidden (void);
|
||
|
|
extern int foo_protected (void);
|
||
|
|
extern int ret_foo;
|
||
|
|
extern int ret_foo_hidden;
|
||
|
|
extern int ret_foo_protected;
|
||
|
|
|
||
|
|
#define FOO_P
|
||
|
|
typedef int (*foo_p) (void);
|
||
|
|
|
||
|
|
foo_p
|
||
|
|
get_foo_p (void)
|
||
|
|
{
|
||
|
|
ret_foo = foo ();
|
||
|
|
return foo;
|
||
|
|
}
|
||
|
|
|
||
|
|
foo_p
|
||
|
|
get_foo_hidden_p (void)
|
||
|
|
{
|
||
|
|
ret_foo_hidden = foo_hidden ();
|
||
|
|
return foo_hidden;
|
||
|
|
}
|
||
|
|
|
||
|
|
foo_p
|
||
|
|
get_foo_protected_p (void)
|
||
|
|
{
|
||
|
|
ret_foo_protected = foo_protected ();
|
||
|
|
return foo_protected;
|
||
|
|
}
|