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e0a3ed4f | 1 | /* Copyright (C) 1999,2002,2004,2006 Free Software Foundation, Inc. |
c072ef6d | 2 | This file is part of the GNU C Library. |
c072ef6d UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
18 | ||
e0a3ed4f RM |
19 | /* We want an #include_next, but we are the main source file. |
20 | So, #include ourselves and in that incarnation we can use #include_next. */ | |
21 | #ifndef INCLUDED_SELF | |
22 | # define INCLUDED_SELF | |
23 | # include <vfork.S> | |
24 | #else | |
25 | ||
26 | # include <tcb-offsets.h> | |
c072ef6d | 27 | |
6fadea9f | 28 | /* Save the PID value. */ |
e0a3ed4f | 29 | # define SAVE_PID \ |
6fadea9f | 30 | movl %gs:PID, %edx; \ |
8b9d6054 UD |
31 | movl %edx, %eax; \ |
32 | negl %eax; \ | |
33 | jne 1f; \ | |
34 | movl $0x80000000, %eax; \ | |
35 | 1: movl %eax, %gs:PID | |
c072ef6d | 36 | |
8b9d6054 | 37 | /* Restore the old PID value in the parent. */ |
e0a3ed4f | 38 | # define RESTORE_PID \ |
6fadea9f UD |
39 | testl %eax, %eax; \ |
40 | je 1f; \ | |
41 | movl %edx, %gs:PID; \ | |
42 | 1: | |
c072ef6d | 43 | |
e0a3ed4f RM |
44 | # include_next <vfork.S> |
45 | #endif |