]>
Commit | Line | Data |
---|---|---|
5f72b005 | 1 | /* Save and set current context. C-SKY ABIV2 version. |
04277e02 | 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
5f72b005 MH |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5f72b005 MH |
18 | |
19 | #include <sysdep.h> | |
20 | ||
21 | #include "ucontext_i.h" | |
22 | ||
23 | /* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ | |
24 | ||
25 | ENTRY (swapcontext) | |
26 | /* Save params and lr. */ | |
27 | subi sp, 16 | |
28 | stw a0, (sp, 0) | |
29 | stw a1, (sp, 4) | |
30 | stw r15, (sp, 8) | |
31 | ||
32 | /* Call getcontext. */ | |
33 | #ifdef __PIC__ | |
34 | grs t1, .Lgetpc1 | |
35 | .Lgetpc1: | |
36 | lrw t0, .Lgetpc1@GOTPC | |
37 | addu t1, t1, t0 | |
38 | lrw t0, __getcontext@GOT | |
39 | ldr.w t0, (t1, t0 << 0) | |
40 | jsr t0 | |
41 | #else /* !__PIC__ */ | |
42 | jsri __getcontext | |
43 | #endif | |
44 | ||
45 | mov a3, a0 /* Save return value. */ | |
46 | ||
47 | /* Restore params and lr. */ | |
48 | ldw a0, (sp, 0) | |
49 | ldw a1, (sp, 4) | |
50 | ldw r15, (sp, 8) | |
51 | addi sp, 16 | |
52 | ||
53 | cmpnei a3, 0 | |
54 | bt error_exit | |
55 | ||
56 | /* Fix up LR and the PC. */ | |
57 | stw sp, (a0, MCONTEXT_CSKY_SP) | |
58 | stw r15, (a0, MCONTEXT_CSKY_LR) | |
59 | stw r15, (a0, MCONTEXT_CSKY_PC) | |
60 | ||
61 | /* Set setcontext's arg. */ | |
62 | mov a0, a1 | |
63 | ||
64 | #ifdef __PIC__ | |
65 | grs t1, .Lgetpc2 | |
66 | .Lgetpc2: | |
67 | lrw a3, .Lgetpc2@GOTPC | |
68 | addu t1, t1, a3 | |
69 | lrw a3, __setcontext@GOT | |
70 | ldr.w a3, (t1, a3 << 0) | |
71 | #else /* __PIC__ */ | |
72 | lrw a3, __setcontext | |
73 | #endif /* __PIC__ */ | |
74 | jmp a3 | |
75 | ||
76 | error_exit: | |
77 | jmp r15 | |
78 | END (swapcontext) |