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45 lines
1.4 KiB
ArmAsm
45 lines
1.4 KiB
ArmAsm
/* Copyright (C) 1999-2013 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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/* We want an #include_next, but we are the main source file.
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So, #include ourselves and in that incarnation we can use #include_next. */
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#ifndef INCLUDED_SELF
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# define INCLUDED_SELF
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# include <vfork.S>
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#else
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# include <tcb-offsets.h>
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/* Save the PID value. */
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# define SAVE_PID \
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movl %gs:PID, %edx; \
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movl %edx, %eax; \
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negl %eax; \
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jne 1f; \
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movl $0x80000000, %eax; \
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1: movl %eax, %gs:PID
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/* Restore the old PID value in the parent. */
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# define RESTORE_PID \
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testl %eax, %eax; \
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je 1f; \
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movl %edx, %gs:PID; \
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1:
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# include_next <vfork.S>
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#endif
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