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d665367f59
This patch assumes static vDSO is supported as default, it is now supported on all current architectures that support vDSO. It allows removing both ALWAYS_USE_VSYSCALL define, which an architecture requires to explicit define and USE_VSYSCALL (which defines vDSO only for shared or if architecture defines ALWAYS_USE_VSYSCALL). Checked with a build against all affected ABIs. [BZ #19767] * sysdeps/unix/sysv/linux/aarch64/sysdep.h (ALWAYS_USE_VSYSCALL): Remove definition. * sysdeps/unix/sysv/linux/arm/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/riscv/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL): Likewise. * sysdeps/unix/sysv/linux/x86/libc-vdso.h: Remove #if USE_VSYSCALL. * sysdeps/unix/sysv/linux/sysdep-vdso.h: Likewise. * sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL, USE_VSYSCALL): Remove defitions.
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/* Copyright (C) 2015-2019 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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#include <bits/wordsize.h>
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#include <kernel-features.h>
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/* Set error number and return -1. A target may choose to return the
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internal function, __syscall_error, which sets errno and returns -1.
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We use -1l, instead of -1, so that it can be casted to (void *). */
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#define INLINE_SYSCALL_ERROR_RETURN_VALUE(err) \
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({ \
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__set_errno (err); \
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-1l; \
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})
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/* Provide a dummy argument that can be used to force register
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alignment for register pairs if required by the syscall ABI. */
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#ifdef __ASSUME_ALIGNED_REGISTER_PAIRS
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#define __ALIGNMENT_ARG 0,
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#define __ALIGNMENT_COUNT(a,b) b
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#else
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#define __ALIGNMENT_ARG
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#define __ALIGNMENT_COUNT(a,b) a
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#endif
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/* Provide a common macro to pass 64-bit value on syscalls. */
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#if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32
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# define SYSCALL_LL(val) (val)
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# define SYSCALL_LL64(val) (val)
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#else
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#define SYSCALL_LL(val) \
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__LONG_LONG_PAIR ((val) >> 31, (val))
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#define SYSCALL_LL64(val) \
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__LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff))
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#endif
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/* Provide a common macro to pass 64-bit value on pread and pwrite
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syscalls. */
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#ifdef __ASSUME_PRW_DUMMY_ARG
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# define SYSCALL_LL_PRW(val) 0, SYSCALL_LL (val)
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# define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val)
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#else
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# define SYSCALL_LL_PRW(val) __ALIGNMENT_ARG SYSCALL_LL (val)
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# define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val)
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#endif
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/* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}. */
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#define LO_HI_LONG(val) \
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(long) (val), \
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(long) (((uint64_t) (val)) >> 32)
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/* Exports the __send symbol on send.c linux implementation (some ABI have
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it missing due the usage of a old generic version without it). */
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#define HAVE_INTERNAL_SEND_SYMBOL 1
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