projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 76deb697 RH |
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 | |
| ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| 76deb697 RH |
17 | |
| 18 | #include <sysdep.h> | |
| 19 | #include <tcb-offsets.h> | |
| 20 | ||
| 21 | #undef PSEUDO_PREPARE_ARGS | |
| 22 | #define PSEUDO_PREPARE_ARGS \ | |
| 23 | /* Load the current cached pid value across the vfork. */ \ | |
| 24 | rduniq; \ | |
| 25 | ldl a2, PID_OFFSET(v0); \ | |
| 26 | mov v0, a1; \ | |
| 27 | /* If the cached value is initialized (nonzero), then write \ | |
| 28 | back its negation, or INT_MIN, to indicate that the pid \ | |
| 29 | value is uninitialized in the the child, and in the window \ | |
| 30 | between here and the point at which we restore the value. */ \ | |
| 31 | ldah t0, -0x8000; \ | |
| 32 | negl a2, t1; \ | |
| 33 | cmovne a2, t1, t0; \ | |
| 34 | stl t0, PID_OFFSET(v0); | |
| 35 | ||
| 36 | PSEUDO (__vfork, vfork, 0) | |
| 37 | ||
| 38 | /* If we're back in the parent, restore the saved pid. */ | |
| 39 | beq v0, 1f | |
| 40 | stl a2, PID_OFFSET(a1) | |
| 41 | 1: ret | |
| 42 | ||
| 43 | PSEUDO_END (__vfork) | |
| 93207f7d | 44 | libc_hidden_def (__vfork) |
| 76deb697 | 45 | weak_alias (__vfork, vfork) |