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linux: Add support for clock_gettime64 vDSO

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No architecture currently defines the vDSO symbol.  On architectures
with 64-bit time_t the HAVE_CLOCK_GETTIME_VSYSCALL is renamed to
HAVE_CLOCK_GETTIME64_VSYSCALL, it simplifies clock_gettime code.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
This commit is contained in:
Adhemerval Zanella
2019-12-11 11:13:50 -03:00
parent 1bdda52fe9
commit ff500a623d
9 changed files with 34 additions and 12 deletions
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4
sysdeps/unix/sysv/linux/s390/sysdep.h
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@ -21,6 +21,10 @@
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETRES_VSYSCALL "__kernel_clock_getres"
#ifdef __s390x__
#define HAVE_CLOCK_GETTIME64_VSYSCALL "__kernel_clock_gettime"
#else
#define HAVE_CLOCK_GETTIME_VSYSCALL "__kernel_clock_gettime"
#endif
#define HAVE_GETTIMEOFDAY_VSYSCALL "__kernel_gettimeofday"
#define HAVE_GETCPU_VSYSCALL "__kernel_getcpu"