diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/time.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/time.c | 67 |
1 files changed, 34 insertions, 33 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/time.c b/sysdeps/unix/sysv/linux/powerpc/time.c index 797341944c..3da0b66dac 100644 --- a/sysdeps/unix/sysv/linux/powerpc/time.c +++ b/sysdeps/unix/sysv/linux/powerpc/time.c @@ -17,6 +17,11 @@ <http://www.gnu.org/licenses/>. */ #ifdef SHARED +# ifndef __powerpc64__ +# define time __redirect_time +# else +# define __redirect_time time +# endif # include <time.h> # include <sysdep.h> @@ -24,7 +29,26 @@ # include <libc-vdso.h> # include <dl-machine.h> -void *time_ifunc (void) asm ("time"); +# ifndef __powerpc64__ +# undef time + +time_t +__time_vsyscall (time_t *t) +{ + return INLINE_VSYSCALL (time, 1, t); +} + +/* __GI_time is defined as hidden and for ppc32 it enables the + compiler make a local call (symbol@local) for internal GLIBC usage. It + means the PLT won't be used and the ifunc resolver will be called directly. + For ppc64 a call to a function in another translation unit might use a + different toc pointer thus disallowing direct branchess and making internal + ifuncs calls safe. */ +# undef libc_hidden_def +# define libc_hidden_def(name) \ + __hidden_ver1 (__time_vsyscall, __GI_time, __time_vsyscall); + +# endif /* !__powerpc64__ */ static time_t time_syscall (time_t *t) @@ -42,42 +66,19 @@ time_syscall (time_t *t) return result; } -void * -time_ifunc (void) -{ - PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565); - - /* If the vDSO is not available we fall back to the syscall. */ +# define INIT_ARCH() \ + PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565); \ void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615); - return (vdso_time ? VDSO_IFUNC_RET (vdso_time) - : (void*)time_syscall); -} -asm (".type time, %gnu_indirect_function"); -/* This is doing "libc_hidden_def (time)" but the compiler won't - * let us do it in C because it doesn't know we're defining time - * here in this file. */ -asm (".globl __GI_time"); - -/* __GI_time is defined as hidden and for ppc32 it enables the - compiler make a local call (symbol@local) for internal GLIBC usage. It - means the PLT won't be used and the ifunc resolver will be called directly. - For ppc64 a call to a function in another translation unit might use a - different toc pointer thus disallowing direct branchess and making internal - ifuncs calls safe. */ -#ifdef __powerpc64__ -asm ("__GI_time = time"); -#else -time_t -__time_vsyscall (time_t *t) -{ - return INLINE_VSYSCALL (time, 1, t); -} -asm ("__GI_time = __time_vsyscall"); -#endif +/* If the vDSO is not available we fall back to the syscall. */ +libc_ifunc_hidden (__redirect_time, time, + vdso_time + ? VDSO_IFUNC_RET (vdso_time) + : (void *) time_syscall); +libc_hidden_def (time) #else #include <sysdeps/posix/time.c> -#endif +#endif /* !SHARED */ |