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522e6ee3 | 1 | /* Save current context. |
d614a753 | 2 | Copyright (C) 2015-2020 Free Software Foundation, Inc. |
522e6ee3 CLT |
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/>. */ |
522e6ee3 CLT |
18 | |
19 | #include <sysdep.h> | |
20 | #include "ucontext_i.h" | |
21 | ||
22 | /* int getcontext (ucontext_t *ucp) | |
23 | ||
24 | Returns 0 on success -1 and errno on failure. | |
25 | */ | |
26 | .text | |
27 | ENTRY(__getcontext) | |
28 | stw r16, (UCONTEXT_MCONTEXT + 16*4)(r4) | |
29 | stw r17, (UCONTEXT_MCONTEXT + 17*4)(r4) | |
30 | stw r18, (UCONTEXT_MCONTEXT + 18*4)(r4) | |
31 | stw r19, (UCONTEXT_MCONTEXT + 19*4)(r4) | |
32 | stw r20, (UCONTEXT_MCONTEXT + 20*4)(r4) | |
33 | stw r21, (UCONTEXT_MCONTEXT + 21*4)(r4) | |
34 | stw r22, (UCONTEXT_MCONTEXT + 22*4)(r4) | |
35 | stw ra, (UCONTEXT_MCONTEXT + 24*4)(r4) | |
36 | stw fp, (UCONTEXT_MCONTEXT + 25*4)(r4) | |
37 | stw gp, (UCONTEXT_MCONTEXT + 26*4)(r4) | |
38 | /* Store return address at place for EA. */ | |
39 | stw ra, (UCONTEXT_MCONTEXT + 28*4)(r4) | |
40 | stw sp, (UCONTEXT_MCONTEXT + 29*4)(r4) | |
41 | /* Store zero for return success. */ | |
42 | stw zero, (UCONTEXT_MCONTEXT + 2*4)(r4) | |
43 | ||
44 | /* Store value "1" at uc_flags to recognize as getcontext created. */ | |
45 | movi r2, 1 | |
46 | stw r2, UCONTEXT_FLAGS(r4) | |
47 | ||
48 | /* Store MCONTEXT_VERSION at first word of mcontext_t. */ | |
49 | movi r2, MCONTEXT_VERSION | |
50 | stw r2, UCONTEXT_MCONTEXT(r4) | |
51 | ||
52 | /* Get signal mask. */ | |
53 | /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ | |
54 | movi r7, _NSIG8 | |
55 | addi r6, r4, UCONTEXT_SIGMASK | |
56 | mov r5, zero | |
57 | movi r4, SIG_BLOCK | |
58 | movi r2, SYS_ify (rt_sigprocmask) | |
59 | trap | |
60 | bne r7, zero, SYSCALL_ERROR_LABEL | |
61 | ||
62 | mov r2, zero | |
63 | ret | |
64 | ||
65 | PSEUDO_END(__getcontext) | |
66 | weak_alias(__getcontext, getcontext) |