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61 lines
1.7 KiB
ArmAsm
61 lines
1.7 KiB
ArmAsm
/* Copyright (C) 2004-2016 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, see
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<http://www.gnu.org/licenses/>. */
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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 <bits/wordsize.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 (__libc_vfork)
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ear %r4,%a0
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sllg %r4,%r4,32
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ear %r4,%a1
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icm %r3,15,PID(%r4)
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llilh %r1,32768
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je 1f
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lcr %r1,%r3
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1: st %r1,PID(%r4)
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/* Do vfork system call. */
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svc SYS_ify (vfork)
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ltgr %r2,%r2
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je 1f
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st %r3,PID(%r4)
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1:
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/* Check for error. */
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lghi %r4,-4095
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clgr %r2,%r4
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jgnl SYSCALL_ERROR_LABEL
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/* Normal return. */
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br %r14
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PSEUDO_END (__libc_vfork)
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#if IS_IN (libc)
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weak_alias (__libc_vfork, vfork)
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strong_alias (__libc_vfork, __vfork)
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libc_hidden_def (__vfork)
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#endif
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