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720e9541f5
Linux 5.1 adds missing SySV IPC syscalls to the syscall table for
remanining one that still uses the ipc syscall on glibc (m68k, mips-o32,
powerpc, s390, sh, and sparc32). However the newly added direct ipc
syscall are different than the old ones:
1. They do not expect IPC_64, meaning __IPC_64 should be set to zero
when new syscalls are used. And new syscalls can not be used
for compat functions like __old_semctl (to emulated old sysvipc it
requires to use the old __NR_ipc syscall without __IPC_64).
Thus IPC_64 is redefined for newer kernels on affected ABIs.
2. semtimedop and semop does not exist on 32-bit ABIs (only
semtimedop_time64 is supplied). The provided syscall wrappers only
uses the wire-up syscall if __NR_semtimedop and __NR_semop are
also defined.
Checked on x86_64-linux-gnu and i686-linux-gnu on both a 4.15 kernel
configure with default options and sysvipc tests on a 5.3.0 kernel with
--enable-kernel=5.1.
Tested-by: Paul A. Clarke <pc@us.ibm.com>
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* Copyright (C) 1995-2019 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@cygnus.com>, 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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<https://www.gnu.org/licenses/>. */
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#include <sys/sem.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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/* Perform user-defined atomical operation of array of semaphores. */
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int
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__semtimedop (int semid, struct sembuf *sops, size_t nsops,
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const struct timespec *timeout)
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{
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/* semtimedop wire-up syscall is not exported for 32-bit ABIs (they have
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semtimedop_time64 instead with uses a 64-bit time_t). */
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#if defined __ASSUME_DIRECT_SYSVIPC_SYSCALLS && defined __NR_semtimedop
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return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout);
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#else
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return INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid,
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SEMTIMEDOP_IPC_ARGS (nsops, sops, timeout));
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#endif
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}
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weak_alias (__semtimedop, semtimedop)
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