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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>
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/* Set flags signalling availability of kernel features based on given
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kernel version number.
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Copyright (C) 1999-2019 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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#include <sgidefs.h>
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#include_next <kernel-features.h>
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/* The MIPS kernel does not support futex_atomic_cmpxchg_inatomic if
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emulating LL/SC. */
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#if __mips == 1 || defined _MIPS_ARCH_R5900
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# undef __ASSUME_SET_ROBUST_LIST
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#endif
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/* Define this if your 32-bit syscall API requires 64-bit register
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pairs to start with an even-number register. */
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#if _MIPS_SIM == _ABIO32
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# define __ASSUME_ALIGNED_REGISTER_PAIRS 1
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/* mips32 only supports ipc syscall before 5.1. */
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# if __LINUX_KERNEL_VERSION < 0x050100
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# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
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# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
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# else
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# endif
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/* The o32 MIPS fadvise64 syscall behaves as fadvise64_64. */
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# define __ASSUME_FADVISE64_AS_64_64 1
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/* mips32 support wire-up network syscalls. */
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# define __ASSUME_RECV_SYSCALL 1
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# define __ASSUME_SEND_SYSCALL 1
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#else
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# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
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#endif
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/* Define that mips64-n32 is a ILP32 ABI to set the correct interface to
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pass 64-bits values through syscalls. */
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#if _MIPS_SIM == _ABIN32
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# define __ASSUME_WORDSIZE64_ILP32 1
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#endif
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#undef __ASSUME_CLONE_DEFAULT
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#define __ASSUME_CLONE_BACKWARDS 1
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