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f6fbce7dd7
Add support for the clock_gettim64 vDSO calls. These are protected by the HAVE_CLOCK_GETTIME64_VSYSCALL define. HAVE_CLOCK_GETTIME64_VSYSCALL should be defined for 32-bit platforms (WORDSIZE == 32) that only run on the 5.1 kernel or later. WORDSIZE == 64 platforms can use #define __vdso_clock_gettime64 __vdso_clock_gettime and use the __vdso_clock_gettime syscall as they don't have a __vdso_clock_gettime64 call. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* Copyright (C) 2009-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _LIBC_VDSO_H
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#define _LIBC_VDSO_H
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#define VDSO_SYMBOL(__name) __vdso_##__name
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/* Adjust the return IFUNC value from a vDSO symbol accordingly required
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by the ELFv1 ABI. It is used by the architecture to create an ODP
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entry since the kernel vDSO does not provide it. */
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#ifndef VDSO_IFUNC_RET
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# define VDSO_IFUNC_RET(__value) (__value)
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#endif
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#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
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extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
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attribute_hidden;
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#endif
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#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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extern int (*VDSO_SYMBOL(clock_gettime64)) (clockid_t, struct __timespec64 *)
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attribute_hidden;
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#endif
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#ifdef HAVE_CLOCK_GETRES_VSYSCALL
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extern int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
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attribute_hidden;
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#endif
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#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
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extern int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
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attribute_hidden;
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#endif
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#ifdef HAVE_GETCPU_VSYSCALL
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extern long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
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attribute_hidden;
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#endif
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#ifdef HAVE_TIME_VSYSCALL
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extern time_t (*VDSO_SYMBOL(time)) (time_t *) attribute_hidden;
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#endif
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#endif /* _LIBC_VDSO_H */
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