mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-10 03:54:48 +00:00
134 lines
2.2 KiB
C
134 lines
2.2 KiB
C
/* Test STT_GNU_IFUNC symbols with dlopen:
|
|
|
|
1. Direct function call.
|
|
2. Function pointer.
|
|
3. Visibility with override.
|
|
*/
|
|
|
|
#include <dlfcn.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
extern int __attribute__ ((noinline)) foo (void);
|
|
extern int __attribute__ ((noinline)) foo_hidden (void);
|
|
extern int __attribute__ ((noinline)) foo_protected (void);
|
|
|
|
typedef int (*foo_p) (void);
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo (void)
|
|
{
|
|
return -30;
|
|
}
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo_hidden (void)
|
|
{
|
|
return -20;
|
|
}
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo_protected (void)
|
|
{
|
|
return -40;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
foo_p p;
|
|
foo_p (*f) (void);
|
|
int *ret;
|
|
|
|
void *h = dlopen ("ifuncmod3.so", RTLD_LAZY);
|
|
if (h == NULL)
|
|
{
|
|
printf ("cannot load: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = dlsym (h, "foo");
|
|
if (p == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
if ((*p) () != -1)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (p != foo)
|
|
abort ();
|
|
if (foo () != -30)
|
|
abort ();
|
|
if (*ret != -30 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_hidden_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo_hidden");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (foo_hidden () != -20)
|
|
abort ();
|
|
if (*ret != 1 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_protected_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo_protected");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (p == foo_protected)
|
|
abort ();
|
|
if (foo_protected () != -40)
|
|
abort ();
|
|
if (*ret != 0 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
if (dlclose (h) != 0)
|
|
{
|
|
printf ("cannot close: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|