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8232e7d209
This patch add a direct call to shmat syscall if it is supported by kernel features. Checked on x86_64, i686, powerpc64le, aarch64, and armhf. * sysdeps/unix/sysv/linux/alpha/syscalls.list (shmat): Remove. * sysdeps/unix/sysv/linux/arm/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/generic/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/hppa/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/ia64/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmat): Likewise. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__NR_shmat): Define to __NR_osf_shmat. * sysdeps/unix/sysv/linux/shmat.c (shmat): Use shmat syscall if it is defined.
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/* Copyright (C) 1995-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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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 <sys/msg.h>
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#include <ipc_priv.h>
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#include <sysdep.h>
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#include <errno.h>
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/* Attach the shared memory segment associated with SHMID to the data
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segment of the calling process. SHMADDR and SHMFLG determine how
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and where the segment is attached. */
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void *
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shmat (int shmid, const void *shmaddr, int shmflg)
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{
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#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
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return (void*) INLINE_SYSCALL_CALL (shmat, shmid, shmaddr, shmflg);
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#else
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INTERNAL_SYSCALL_DECL(err);
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unsigned long resultvar;
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void *raddr;
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resultvar = INTERNAL_SYSCALL_CALL (ipc, err, IPCOP_shmat, shmid, shmflg,
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&raddr, shmaddr);
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if (INTERNAL_SYSCALL_ERROR_P (resultvar, err))
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return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (resultvar,
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err));
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return raddr;
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#endif
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}
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