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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>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* vDSO internal symbols. Linux generic version.
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Copyright (C) 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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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<http://www.gnu.org/licenses/>. */
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#include <dl-vdso.h>
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#include <libc-vdso.h>
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/* vDSO symbol used on clock_gettime implementation. */
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#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
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int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
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attribute_hidden;
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#endif
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/* vDSO symbol used on clock_gettime64 implementation. */
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#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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int (*VDSO_SYMBOL(clock_gettime64)) (clockid_t, struct __timespec64 *)
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attribute_hidden;
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#endif
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/* vDSO symbol used on clock_getres implementation. */
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#ifdef HAVE_CLOCK_GETRES_VSYSCALL
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int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
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attribute_hidden;
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#endif
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/* vDSO symbol used on gettimeofday implementation. */
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#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
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int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
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attribute_hidden;
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#endif
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/* vDSO symbol used on GNU extension getcpu implementation. */
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#ifdef HAVE_GETCPU_VSYSCALL
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long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
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attribute_hidden;
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#endif
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/* vDSO symbol used on time implementation. */
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#ifdef HAVE_TIME_VSYSCALL
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time_t (*VDSO_SYMBOL(time)) (time_t *) attribute_hidden;
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#endif
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static inline void
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__libc_vdso_platform_setup (void)
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{
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#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
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VDSO_SYMBOL(clock_gettime)
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= get_vdso_mangle_symbol (HAVE_CLOCK_GETTIME_VSYSCALL);
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#endif
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#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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VDSO_SYMBOL(clock_gettime64)
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= get_vdso_mangle_symbol (HAVE_CLOCK_GETTIME64_VSYSCALL);
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#endif
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#ifdef HAVE_CLOCK_GETRES_VSYSCALL
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VDSO_SYMBOL(clock_getres)
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= get_vdso_mangle_symbol (HAVE_CLOCK_GETRES_VSYSCALL);
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#endif
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#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
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VDSO_SYMBOL(gettimeofday)
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= get_vdso_mangle_symbol (HAVE_GETTIMEOFDAY_VSYSCALL);
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#endif
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#ifdef HAVE_GETCPU_VSYSCALL
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VDSO_SYMBOL(getcpu) = get_vdso_mangle_symbol (HAVE_GETCPU_VSYSCALL);
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#endif
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#ifdef HAVE_TIME_VSYSCALL
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VDSO_SYMBOL(time) = get_vdso_mangle_symbol (HAVE_TIME_VSYSCALL);
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#endif
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#ifdef VDSO_SETUP_ARCH
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VDSO_SETUP_ARCH ();
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#endif
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}
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#define VDSO_SETUP __libc_vdso_platform_setup
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#include <csu/init-first.c>
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