diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c index 7593720169..29b6624b9a 100644 --- a/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c +++ b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c @@ -23,17 +23,11 @@ #include <not-cancel.h> #include <libc-vdso.h> -uint64_t -__get_timebase_freq (void) +static uint64_t +get_timebase_freq_fallback (void) { hp_timing_t result = 0L; -#ifdef SHARED - /* The vDSO does not return an error (it clear cr0.so on returning). */ - INTERNAL_SYSCALL_DECL (err); - result = - INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, uint64_t, 0); -#else /* We read the information from the /proc filesystem. /proc/cpuinfo contains at least one line like: timebase : 33333333 @@ -99,8 +93,20 @@ __get_timebase_freq (void) } } } -#endif return result; } + +uint64_t +__get_timebase_freq (void) +{ + /* The vDSO does not have a fallback mechanism (such calling a syscall). */ + __typeof (VDSO_SYMBOL (get_tbfreq)) vdsop = VDSO_SYMBOL (get_tbfreq); + PTR_DEMANGLE (vdsop); + if (vdsop == NULL) + return get_timebase_freq_fallback (); + + INTERNAL_SYSCALL_DECL (err); + return INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, uint64_t, 0); +} weak_alias (__get_timebase_freq, __ppc_get_timebase_freq) |