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Make sure __vdso_clock_gettime always contains a valid pointer

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This commit is contained in:
Ulrich Drepper 2011-09-07 00:07:08 -04:00
parent fc8bffcccf
commit e38ba7ab6a
3 changed files with 16 additions and 0 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2011-09-07 Ulrich Drepper <drepper@gmail.com>
* sysdeps/unix/sysv/linux/x86_64/init-first.c
(_libc_vdso_platform_setup): If vDSO is not present store pointer to
syscall wrapper around clock_gettime in __vdso_clock_gettime.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Add entry for
clock_gettime.
2011-09-06 Ulrich Drepper <drepper@gmail.com>
* sysdeps/unix/sysv/linux/x86_64/clock_gettime.c (INTERNAL_GETTIME):

7
sysdeps/unix/sysv/linux/x86_64/init-first.c
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@ -17,6 +17,8 @@
02111-1307 USA. */
#ifdef SHARED
# include <time.h>
# include <sysdep.h>
# include <dl-vdso.h>
# include <bits/libc-vdso.h>
@ -27,12 +29,17 @@ strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
long int (*__vdso_getcpu) (unsigned *, unsigned *, void *) attribute_hidden;
extern long int __syscall_clock_gettime (clockid_t, struct timespec *);
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
void *p = _dl_vdso_vsym ("clock_gettime", &linux26);
if (p == NULL)
p = __syscall_clock_gettime;
PTR_MANGLE (p);
__GI___vdso_clock_gettime = p;

1
sysdeps/unix/sysv/linux/x86_64/syscalls.list
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@ -14,6 +14,7 @@ semop - semop i:ipi __semop semop
semtimedop - semtimedop i:ipip semtimedop
semget - semget i:iii __semget semget
semctl - semctl i:iiii __semctl semctl
syscall_clock_gettime EXTRA clock_gettime Ei:ip __syscall_clock_gettime
# proper socket implementations: