mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-04 00:31:09 +00:00
d39c0a459e
This patch fixes 3dc214977 for sparc. Different than other architectures
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 for clone:
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).
Checked on sparc64-linux-gnu and sparcv9-linux-gnu.
* sysdeps/unix/sysv/linux/arch-fork.h [__ASSUME_CLONE_BACKWARDS]
(arch_fork): Issue INLINE_CLONE_SYSCALL if defined.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Define.
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* Set flags signalling availability of kernel features based on given
|
|
kernel version number. SPARC version.
|
|
Copyright (C) 1999-2018 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* SPARC uses socketcall. */
|
|
#define __ASSUME_SOCKETCALL 1
|
|
|
|
#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
|
|
|
|
#if !defined __arch64__
|
|
# undef __ASSUME_ACCEPT_SYSCALL
|
|
# undef __ASSUME_CONNECT_SYSCALL
|
|
# undef __ASSUME_RECVFROM_SYSCALL
|
|
#else
|
|
/* 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. */
|
|
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
|
|
|
|
/* 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
|