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45 lines
1.2 KiB
ArmAsm
45 lines
1.2 KiB
ArmAsm
/* vfork for Nios II Linux.
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Copyright (C) 2005-2016 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, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <tcb-offsets.h>
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ENTRY(__vfork)
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ldw r6, PID_OFFSET(r23)
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sub r7, zero, r6
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bne r7, zero, 2f
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movhi r7, %hi(0x80000000)
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2:
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stw r7, PID_OFFSET(r23)
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movi r4, 0x4111 /* (CLONE_VM | CLONE_VFORK | SIGCHLD) */
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mov r5, zero
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DO_CALL (clone, 2)
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beq r2, zero, 1f
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stw r6, PID_OFFSET(r23)
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1:
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bne r7, zero, SYSCALL_ERROR_LABEL
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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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