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1 | /* Copyright (C) 2004 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
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, see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | /* We want an #include_next, but we are the main source file. | |
19 | So, #include ourselves and in that incarnation we can use #include_next. */ | |
20 | #ifndef INCLUDED_SELF | |
21 | # define INCLUDED_SELF | |
22 | # include <vfork.S> | |
23 | #else | |
24 | ||
25 | # include <tcb-offsets.h> | |
26 | ||
27 | # define SAVE_PID \ | |
28 | movl %fs:PID, %esi; \ | |
29 | movl $0x80000000, %ecx; \ | |
30 | movl %esi, %edx; \ | |
31 | negl %edx; \ | |
32 | cmove %ecx, %edx; \ | |
33 | movl %edx, %fs:PID | |
34 | ||
35 | # define RESTORE_PID \ | |
36 | testq %rax, %rax; \ | |
37 | je 1f; \ | |
38 | movl %esi, %fs:PID; \ | |
39 | 1: | |
40 | ||
41 | # include_next <vfork.S> | |
42 | #endif |