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986a506481
This patch simplifies the powerpc internal macros for vDSO calls
by:
- Removing INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK, used solely on
get_timebase_freq.
- Adjust INTERNAL_VSYSCALL_CALL_TYPE powerpc32 to follow powerpc64
argument ordering.
- Use HAVE_*_VSYSCALL instead of explicit strings.
- Make powerpc libc-vdso.h include generic implementation.
No semantic change expected, checked on powerpc-linux-gnu-power4,
powerpc64-linux-gnu, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/libc-vdso.h (VDSO_IFUNC_RET): Define if not
defined.
* sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
(__get_timebase_freq): Remove use of
INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK.
(get_timebase_freq_fallback): New symbol.
* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c (time): Use
HAVE_GETTIMEOFDAY_VSYSCALL.
* sysdeps/unix/sysv/linux/powerpc/time.c (gettimeofday): Use
HAVE_TIME_VSYSCALL.
* sysdeps/unix/sysv/linux/powerpc/libc-vdso.h: Include generic
implementation.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
(INTERNAL_VSYSCALL_CALL_TYPE): Make calling convention similar to
powerpc64.
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Remove macro.
* .../sysv/linux/powerpc/powerpc64/sysdep.h
(INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK): Likewise.
* sysdeps/unix/sysv/linux/powerpc/sysdep.h
(HAVE_GETTIMEOFDAY_VSYSCALL): Define.
52 lines
1.8 KiB
C
52 lines
1.8 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_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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