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linux: Add support for clock_gettime64 vDSO
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>
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@ -30,21 +30,24 @@ int
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__clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp)
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{
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#ifdef __ASSUME_TIME64_SYSCALLS
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/* 64 bit ABIs or Newer 32-bit ABIs that only support 64-bit time_t. */
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# ifdef __NR_clock_gettime64
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return INLINE_SYSCALL_CALL (clock_gettime64, clock_id, tp);
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/* 64 bit ABIs or newer 32-bit ABIs that only support 64-bit time_t. */
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# ifndef __NR_clock_gettime64
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# define __NR_clock_gettime64 __NR_clock_gettime
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# endif
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# ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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return INLINE_VSYSCALL (clock_gettime64, 2, clock_id, tp);
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# else
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# ifdef HAVE_CLOCK_GETTIME_VSYSCALL
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return INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp);
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# else
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return INLINE_SYSCALL_CALL (clock_gettime, clock_id, tp);
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# endif
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return INLINE_SYSCALL_CALL (clock_gettime64, clock_id, tp);
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# endif
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#else
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int r;
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/* Old 32-bit ABI with possible 64-bit time_t support. */
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# ifdef __NR_clock_gettime64
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# ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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r = INLINE_VSYSCALL (clock_gettime64, 2, clock_id, tp);
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# else
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r = INLINE_SYSCALL_CALL (clock_gettime64, clock_id, tp);
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# endif
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if (r == 0 || errno != ENOSYS)
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return r;
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# endif
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