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6d3a2bec95
2004-03-10 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: No need to include <sysdep-cancel.h>, vfork is no cancellation point. * sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pt-vfork.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pt-vfork.S: Likewise.
58 lines
1.7 KiB
ArmAsm
58 lines
1.7 KiB
ArmAsm
/* Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
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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.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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#include <tcb-offsets.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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ENTRY (__vfork)
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lwz 0,PID(2)
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cmpwi 0,0,0
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neg 0,0
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bne- 0,1f
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lis 0,0x8000
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1: stw 0,PID(2)
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DO_CALL (SYS_ify (vfork))
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cmpwi 1,3,0
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beqlr- 1
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lwz 0,PID(2)
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/* Cannot use clrlwi. here, because cr0 needs to be preserved
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until PSEUDO_RET. */
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clrlwi 4,0,1
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cmpwi 1,4,0
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beq- 1,1f
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neg 4,0
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1: stw 4,PID(2)
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PSEUDO_RET
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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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