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path: root/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S
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/* Copyright (C) 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <tcb-offsets.h>

#define SAVE_PID \
	movl	%fs:PID, %esi;						      \
	movl	%esi, %edx;						      \
	negl	%edx;							      \
	movl	%edx, %fs:PID

#define RESTORE_PID \
	testq	%rax, %rax;						      \
	je	1f;							      \
	movl	%esi, %fs:PID;						      \
1:

#include <../../../../../../../libc/sysdeps/linux/x86_64/vfork.S>