glibc/elf/ifuncmod5.c
H.J. Lu e0ed2fb40a Replace __attribute__((visibility("protected")))
With copy relocation, address of protected data defined in the shared
library may be external.  Compiler shouldn't asssume protected data will
be local.  But due to

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248

__attribute__((visibility("protected"))) doesn't work correctly, we need
to use asm (".protected xxx") instead.

	* elf/ifuncdep2.c (global): Replace
	__attribute__((visibility("protected"))) with
	asm (".protected global").
	* elf/ifuncmod1.c (global): Likewise.
	* elf/ifuncmod5.c (global): Likewise.
2015-03-06 17:05:42 -08:00

62 lines
1.1 KiB
C

/* Test STT_GNU_IFUNC symbols without direct function call. */
#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 *
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 *
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 *
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");