1 | /* Save current context and install the given one. |
2 | Copyright (C) 2004-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library. If not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sysdep.h> |
20 | #include <ucontext-offsets.h> |
21 | |
22 | ENTRY(__swapcontext) |
23 | |
24 | #ifdef PROF |
25 | ldgp $29, 0($27) |
26 | .set noat |
27 | lda AT, _mcount |
28 | jsr AT, (AT), _mcount |
29 | .set at |
30 | .prologue 1 |
31 | #elif defined PIC |
32 | .prologue 0 |
33 | #else |
34 | ldgp $29, 0($27) |
35 | .prologue 1 |
36 | #endif |
37 | |
38 | #ifdef PIC |
39 | unop |
40 | bsr $0, __getcontext_x !samegp |
41 | mov $17, $16 |
42 | br $31, __setcontext !samegp |
43 | #else |
44 | jsr $0, __getcontext_x |
45 | mov $17, $16 |
46 | jmp $31, __setcontext |
47 | #endif |
48 | |
49 | END(__swapcontext) |
50 | weak_alias (__swapcontext, swapcontext) |
51 | |