mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
227de9dd23
* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_VFORK_SYSCALL): Define for kernel 2.4 on arm. * sysdeps/unix/sysv/linux/arm/vfork.S: Elide compatibility code when __ASSUME_VFORK_SYSCALL is defined. * sysdeps/unix/sysv/linux/arm/mmap64.S: Likewise for __ASSUME_MMAP2_SYSCALL. * sysdeps/unix/sysv/linux/arm/sigaction.c: Likewise for __ASSUME_REALTIME_SIGNALS.
59 lines
1.8 KiB
ArmAsm
59 lines
1.8 KiB
ArmAsm
/* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Philip Blundell <philb@gnu.org>.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#define _ERRNO_H 1
|
|
#include <bits/errno.h>
|
|
#include <kernel-features.h>
|
|
|
|
/* Clone the calling process, but without copying the whole address space.
|
|
The calling process is suspended until the new process exits or is
|
|
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
|
|
and the process ID of the new process to the old process. */
|
|
|
|
ENTRY (__vfork)
|
|
|
|
#ifdef __NR_vfork
|
|
swi __NR_vfork
|
|
cmn a1, #4096
|
|
RETINSTR(movcc, pc, lr)
|
|
|
|
# ifdef __ASSUME_VFORK_SYSCALL
|
|
b PLTJMP(C_SYMBOL_NAME(__syscall_error))
|
|
# else
|
|
/* Check if vfork syscall is known at all. */
|
|
ldr a2, =-ENOSYS
|
|
teq a1, a2
|
|
bne PLTJMP(C_SYMBOL_NAME(__syscall_error))
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef __ASSUME_VFORK_SYSCALL
|
|
/* If we don't have vfork, fork is close enough. */
|
|
swi __NR_fork
|
|
cmn a1, #4096
|
|
RETINSTR(movcc, pc, lr)
|
|
b PLTJMP(C_SYMBOL_NAME(__syscall_error))
|
|
#endif
|
|
|
|
PSEUDO_END (__vfork)
|
|
libc_hidden_def (__vfork)
|
|
|
|
weak_alias (__vfork, vfork)
|