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92 lines
2.3 KiB
ArmAsm
92 lines
2.3 KiB
ArmAsm
/* Copyright (C) 2003 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep-cancel.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include <kernel-features.h>
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/* Clone the calling process, but without copying the whole address space.
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The calling process is suspended until the new process exits or is
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replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
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and the process ID of the new process to the old process. */
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#ifdef SHARED
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.section ".toc","aw"
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.LC0:
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.tc __libc_pthread_functions[TC],__libc_pthread_functions
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.section ".text"
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.align 2
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#endif
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ENTRY (__vfork)
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#ifdef __NR_vfork
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# ifdef SHARED
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ld 10,.LC0@toc(2)
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ld 10,0(10)
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cmpwi 10,0
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bne- HIDDEN_JUMPTARGET(__fork)
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# else
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.weak pthread_create
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lis 10,pthread_create@highest
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ori 10,10,pthread_create@higher
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sldi 10,10,32
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oris 10,10,pthread_create@h
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ori 10,10,pthread_create@l
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cmpwi 10,0
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bne- .Lhidden_fork
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# endif
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DO_CALL (SYS_ify (vfork));
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# ifdef __ASSUME_VFORK_SYSCALL
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PSEUDO_RET
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# else
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bnslr+
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/* Check if vfork syscall is known at all. */
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cmpdi r3,ENOSYS
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# ifdef SHARED
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bne JUMPTARGET(__syscall_error)
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# else
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bne- .Lsyscall_error
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# endif
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# endif
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#endif
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#ifndef __ASSUME_VFORK_SYSCALL
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/* If we don't have vfork, fork is close enough. */
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DO_CALL (SYS_ify (fork));
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PSEUDO_RET
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#endif
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# ifndef SHARED
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.Lhidden_fork:
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b HIDDEN_JUMPTARGET(__fork)
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.Lsyscall_error:
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b JUMPTARGET(__syscall_error)
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# endif
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PSEUDO_END (__vfork)
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libc_hidden_def (__vfork)
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weak_alias (__vfork, vfork)
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