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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>
87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
/* Set flags signalling availability of kernel features based on given
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kernel version number. SPARC 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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#include_next <kernel-features.h>
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/* 32-bit SPARC kernels do not support
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futex_atomic_cmpxchg_inatomic. */
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#if !defined __arch64__ && !defined __sparc_v9__
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# undef __ASSUME_SET_ROBUST_LIST
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#endif
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/* These syscalls were added for 32-bit in 4.4 (but present for 64-bit
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in all supported kernel versions); the architecture-independent
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kernel-features.h assumes some of them to be present by default.
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getpeername and getsockname syscalls were also added for 32-bit in
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4.4, but only for 32-bit kernels, not in the compat syscall table
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for 64-bit kernels. */
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#if !defined __arch64__ && __LINUX_KERNEL_VERSION < 0x040400
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# undef __ASSUME_SENDMSG_SYSCALL
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# undef __ASSUME_RECVMSG_SYSCALL
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# undef __ASSUME_ACCEPT_SYSCALL
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# undef __ASSUME_CONNECT_SYSCALL
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# undef __ASSUME_RECVFROM_SYSCALL
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# undef __ASSUME_SENDTO_SYSCALL
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#else
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# define __ASSUME_SOCKET_SYSCALL 1
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# define __ASSUME_SOCKETPAIR_SYSCALL 1
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# define __ASSUME_GETSOCKOPT_SYSCALL 1
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# define __ASSUME_SHUTDOWN_SYSCALL 1
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#endif
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/* These syscalls were added for both 32-bit and 64-bit in 4.4. */
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#if __LINUX_KERNEL_VERSION >= 0x040400
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# define __ASSUME_BIND_SYSCALL 1
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# define __ASSUME_LISTEN_SYSCALL 1
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# define __ASSUME_SETSOCKOPT_SYSCALL 1
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#endif
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#ifdef __arch64__
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/* sparc64 defines __NR_pause, however it is not supported (ENOSYS).
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Undefine so pause.c can use a correct alternative. */
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# undef __NR_pause
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#endif
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/* sparc 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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# if !defined __arch64__
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# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
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# endif
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#endif
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/* Support for the renameat2 syscall was added in 3.16. */
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#if __LINUX_KERNEL_VERSION < 0x031000
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# undef __ASSUME_RENAMEAT2
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#endif
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/* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it
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has the same ABI as if it did, implemented by sparc-specific code
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(sparc_do_fork).
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It also has a unique return value convention:
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Parent --> %o0 == child's pid, %o1 == 0
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Child --> %o0 == parent's pid, %o1 == 1
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Which required a special macro to correct issue the syscall
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(INLINE_CLONE_SYSCALL). */
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#undef __ASSUME_CLONE_DEFAULT
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#define __ASSUME_CLONE_BACKWARDS 1
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