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5e855c8954
Although s390 only enables vDSO for dynamically linked elf binaries (arch/s390/kernel/vdso.c:217), there is no indication in the code or associated commit message for why not enable it for statically linked binaries as well. To double check, I rebuilt a kernel with the check removed and the vDSO does work for static build for supplied symbols. Checked on s390x-linux-gnu and s390-linux-gnu. [BZ #19767] * sysdeps/unix/sysv/linux/s390/init-first.c: Remove #ifdef SHARED. * sysdeps/unix/sysv/linux/s390/libc-vdso.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (ALWAYS_USE_VSYSCALL): Define. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise.
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* Resolve function pointers to VDSO functions.
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Copyright (C) 2008-2019 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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<http://www.gnu.org/licenses/>. */
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#ifndef _LIBC_VDSO_H
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#define _LIBC_VDSO_H
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#include <sysdep-vdso.h>
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extern long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
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attribute_hidden;
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extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
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extern long int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
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extern long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
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attribute_hidden;
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#endif /* _LIBC_VDSO_H */
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