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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>
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* Set flags signalling availability of kernel features based on given
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kernel version number. SH version.
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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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#ifndef __KERNEL_FEATURES_SH__
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# define __KERNEL_FEATURES_SH__
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#include <endian.h>
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/* These syscalls were added for SH in 2.6.37. */
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#define __ASSUME_SOCKET_SYSCALL 1
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#define __ASSUME_BIND_SYSCALL 1
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#define __ASSUME_CONNECT_SYSCALL 1
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#define __ASSUME_LISTEN_SYSCALL 1
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#define __ASSUME_GETSOCKNAME_SYSCALL 1
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#define __ASSUME_GETPEERNAME_SYSCALL 1
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#define __ASSUME_SOCKETPAIR_SYSCALL 1
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#define __ASSUME_SEND_SYSCALL 1
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#define __ASSUME_RECV_SYSCALL 1
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#define __ASSUME_SHUTDOWN_SYSCALL 1
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#define __ASSUME_GETSOCKOPT_SYSCALL 1
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#define __ASSUME_SETSOCKOPT_SYSCALL 1
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#include_next <kernel-features.h>
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/* SH4 ABI does not really require argument alignment for 64-bits, but
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the kernel interface for p{read,write}64 adds a dummy long argument
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before the offset. */
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#define __ASSUME_PRW_DUMMY_ARG 1
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/* sh 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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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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# define __ASSUME_SYSVIPC_BROKEN_MODE_T
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#endif
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/* Support for several syscalls was added in 4.8. */
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#if __LINUX_KERNEL_VERSION < 0x040800
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# undef __ASSUME_RENAMEAT2
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# undef __ASSUME_EXECVEAT
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# undef __ASSUME_MLOCK2
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#endif
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/* sh does not support the statx system call before 5.1. */
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#if __LINUX_KERNEL_VERSION < 0x050100
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# undef __ASSUME_STATX
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#endif
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#endif
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