mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 06:10:10 +00:00
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
|
|
kernel version number. SPARC version.
|
|
Copyright (C) 1999-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include_next <kernel-features.h>
|
|
|
|
/* 32-bit SPARC kernels do not support
|
|
futex_atomic_cmpxchg_inatomic. */
|
|
#if !defined __arch64__ && !defined __sparc_v9__
|
|
# undef __ASSUME_SET_ROBUST_LIST
|
|
#endif
|
|
|
|
/* These syscalls were added for 32-bit in 4.4 (but present for 64-bit
|
|
in all supported kernel versions); the architecture-independent
|
|
kernel-features.h assumes some of them to be present by default.
|
|
getpeername and getsockname syscalls were also added for 32-bit in
|
|
4.4, but only for 32-bit kernels, not in the compat syscall table
|
|
for 64-bit kernels. */
|
|
#if !defined __arch64__ && __LINUX_KERNEL_VERSION < 0x040400
|
|
# undef __ASSUME_SENDMSG_SYSCALL
|
|
# undef __ASSUME_RECVMSG_SYSCALL
|
|
# undef __ASSUME_ACCEPT_SYSCALL
|
|
# undef __ASSUME_CONNECT_SYSCALL
|
|
# undef __ASSUME_RECVFROM_SYSCALL
|
|
# undef __ASSUME_SENDTO_SYSCALL
|
|
#else
|
|
# define __ASSUME_SOCKET_SYSCALL 1
|
|
# define __ASSUME_SOCKETPAIR_SYSCALL 1
|
|
# define __ASSUME_GETSOCKOPT_SYSCALL 1
|
|
# define __ASSUME_SHUTDOWN_SYSCALL 1
|
|
#endif
|
|
|
|
/* These syscalls were added for both 32-bit and 64-bit in 4.4. */
|
|
#if __LINUX_KERNEL_VERSION >= 0x040400
|
|
# define __ASSUME_BIND_SYSCALL 1
|
|
# define __ASSUME_LISTEN_SYSCALL 1
|
|
# define __ASSUME_SETSOCKOPT_SYSCALL 1
|
|
#endif
|
|
|
|
#ifdef __arch64__
|
|
/* sparc64 defines __NR_pause, however it is not supported (ENOSYS).
|
|
Undefine so pause.c can use a correct alternative. */
|
|
# undef __NR_pause
|
|
#endif
|
|
|
|
/* sparc only supports ipc syscall before 5.1. */
|
|
#if __LINUX_KERNEL_VERSION < 0x050100
|
|
# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
|
|
# if !defined __arch64__
|
|
# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
|
|
# endif
|
|
#endif
|
|
|
|
/* Support for the renameat2 syscall was added in 3.16. */
|
|
#if __LINUX_KERNEL_VERSION < 0x031000
|
|
# undef __ASSUME_RENAMEAT2
|
|
#endif
|
|
|
|
/* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it
|
|
has the same ABI as if it did, implemented by sparc-specific code
|
|
(sparc_do_fork).
|
|
|
|
It also has a unique return value convention:
|
|
|
|
Parent --> %o0 == child's pid, %o1 == 0
|
|
Child --> %o0 == parent's pid, %o1 == 1
|
|
|
|
Which required a special macro to correct issue the syscall
|
|
(INLINE_CLONE_SYSCALL). */
|
|
#undef __ASSUME_CLONE_DEFAULT
|
|
#define __ASSUME_CLONE_BACKWARDS 1
|