]>
Commit | Line | Data |
---|---|---|
5f72b005 | 1 | /* Save 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 | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <sysdep.h> | |
20 | ||
21 | #include "ucontext_i.h" | |
22 | ||
23 | /* int getcontext (ucontext_t *ucp) */ | |
24 | ||
25 | ENTRY (__getcontext) | |
26 | /* No need to save r2-r7 or a0-a3. */ | |
27 | mov t0, a0 | |
28 | ||
29 | addi a0, MCONTEXT_CSKY_R4 | |
30 | ||
31 | stm r4-r13, (a0) /* Save r4-r13. */ | |
32 | stw sp, (t0, MCONTEXT_CSKY_SP) /* Save sp. */ | |
33 | stw r15, (t0, MCONTEXT_CSKY_LR) /* Save lr. */ | |
34 | stw r15, (t0, MCONTEXT_CSKY_PC) /* Return to PC. */ | |
35 | addi a0, t0, MCONTEXT_CSKY_R16 | |
36 | stm r16-r31, (a0) /* Save r16-r31. */ | |
37 | movi a0, 0 | |
38 | stw a0, (t0, MCONTEXT_CSKY_A0) /* Return zero. */ | |
39 | ||
40 | subi sp, 8 | |
41 | stw t0, (sp, 0) /* Save t0 after "save sp". */ | |
42 | ||
43 | /* __sigprocmask (SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */ | |
44 | movi a0, SIG_BLOCK | |
45 | movi a1, 0 | |
46 | addi a2, t0, UCONTEXT_SIGMASK | |
47 | ||
48 | /* Do sigprocmask syscall. */ | |
49 | #ifdef __PIC__ | |
50 | subi sp, 8 | |
51 | stw gb, (sp, 0) | |
52 | grs gb, .Lgetpc | |
53 | .Lgetpc: | |
54 | lrw a3, .Lgetpc@GOTPC | |
55 | addu gb, gb, a3 | |
56 | lrw a3, __sigprocmask@PLT | |
57 | ldr.w a3, (gb, a3 << 0) | |
58 | jsr a3 | |
59 | ldw gb, (sp, 0) | |
60 | addi sp, 8 | |
61 | #else | |
62 | jsri __sigprocmask | |
63 | #endif | |
64 | ||
65 | ldw t0, (sp, 0) | |
66 | addi sp, 8 | |
67 | /* Restore r15 for sigprocmask changes. */ | |
68 | ldw r15, (t0, MCONTEXT_CSKY_LR) | |
69 | movi a0, 0 /* Return 0. */ | |
70 | jmp r15 | |
71 | END (__getcontext) | |
72 | ||
73 | weak_alias (__getcontext, getcontext) |