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688903eb | 1 | /* Copyright (C) 2001-2018 Free Software Foundation, Inc. |
816fc1ed UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
816fc1ed UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
816fc1ed | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
816fc1ed UD |
18 | |
19 | #include <sysdep.h> | |
20 | #include <features.h> | |
21 | ||
22 | #include "ucontext_i.h" | |
23 | ||
24 | /* __setcontext (const ucontext_t *ucp) | |
25 | ||
26 | Restores the machine context in UCP and thereby resumes execution | |
27 | in that context. | |
28 | ||
29 | This implementation is intended to be used for *synchronous* context | |
30 | switches only. Therefore, it does not have to restore anything | |
31 | other than the PRESERVED state. */ | |
32 | ||
33 | ENTRY(__setcontext) | |
c3e94a95 | 34 | lgr %r1,%r2 |
816fc1ed UD |
35 | |
36 | /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ | |
2e807f29 | 37 | la %r2,SIG_SETMASK |
c3e94a95 | 38 | la %r3,SC_MASK(%r1) |
816fc1ed | 39 | slgr %r4,%r4 |
c3e94a95 | 40 | lghi %r5,_NSIG8 |
816fc1ed UD |
41 | svc SYS_ify(rt_sigprocmask) |
42 | ||
43 | /* Load fpu context. */ | |
c3e94a95 AK |
44 | lfpc SC_FPC(%r1) |
45 | ld %f0,SC_FPRS(%r1) | |
46 | ld %f1,SC_FPRS+8(%r1) | |
47 | ld %f2,SC_FPRS+16(%r1) | |
48 | ld %f3,SC_FPRS+24(%r1) | |
49 | ld %f4,SC_FPRS+32(%r1) | |
50 | ld %f5,SC_FPRS+40(%r1) | |
51 | ld %f6,SC_FPRS+48(%r1) | |
52 | ld %f7,SC_FPRS+56(%r1) | |
53 | ld %f8,SC_FPRS+64(%r1) | |
54 | ld %f9,SC_FPRS+72(%r1) | |
55 | ld %f10,SC_FPRS+80(%r1) | |
56 | ld %f11,SC_FPRS+88(%r1) | |
57 | ld %f12,SC_FPRS+96(%r1) | |
58 | ld %f13,SC_FPRS+104(%r1) | |
59 | ld %f14,SC_FPRS+112(%r1) | |
60 | ld %f15,SC_FPRS+120(%r1) | |
8e294940 UD |
61 | |
62 | /* Don't touch %a0 and %a1, used for thread purposes. */ | |
c3e94a95 | 63 | lam %a2,%a15,SC_ACRS+8(%r1) |
9c84384c | 64 | |
816fc1ed | 65 | /* Load general purpose registers. */ |
c3e94a95 | 66 | lmg %r0,%r15,SC_GPRS(%r1) |
816fc1ed | 67 | |
58f46c79 | 68 | /* Return. */ |
816fc1ed UD |
69 | br %r14 |
70 | END(__setcontext) | |
71 | ||
1ab18a5b | 72 | weak_alias (__setcontext, setcontext) |