| 1 | /* Copyright (C) 2001-2024 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <sysdep.h> |
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| 19 | #include <features.h> |
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| 20 | |
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| 21 | #include "ucontext_i.h" |
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| 22 | |
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| 23 | /* __setcontext (const ucontext_t *ucp) |
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| 24 | |
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| 25 | Restores the machine context in UCP and thereby resumes execution |
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| 26 | in that context. |
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| 27 | |
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| 28 | This implementation is intended to be used for *synchronous* context |
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| 29 | switches only. Therefore, it does not have to restore anything |
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| 30 | other than the PRESERVED state. */ |
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| 31 | |
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| 32 | ENTRY(__setcontext) |
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| 33 | lgr %r0,%r2 |
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| 34 | |
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| 35 | /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ |
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| 36 | la %r3,SC_MASK(%r2) |
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| 37 | la %r2,SIG_SETMASK |
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| 38 | slgr %r4,%r4 |
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| 39 | lghi %r5,_NSIG8 |
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| 40 | lghi %r1,SYS_ify(rt_sigprocmask) |
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| 41 | svc 0 |
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| 42 | |
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| 43 | /* Load fpu context. */ |
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| 44 | lgr %r1,%r0 |
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| 45 | lfpc SC_FPC(%r1) |
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| 46 | ld %f0,SC_FPRS(%r1) |
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| 47 | ld %f1,SC_FPRS+8(%r1) |
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| 48 | ld %f2,SC_FPRS+16(%r1) |
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| 49 | ld %f3,SC_FPRS+24(%r1) |
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| 50 | ld %f4,SC_FPRS+32(%r1) |
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| 51 | ld %f5,SC_FPRS+40(%r1) |
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| 52 | ld %f6,SC_FPRS+48(%r1) |
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| 53 | ld %f7,SC_FPRS+56(%r1) |
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| 54 | ld %f8,SC_FPRS+64(%r1) |
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| 55 | ld %f9,SC_FPRS+72(%r1) |
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| 56 | ld %f10,SC_FPRS+80(%r1) |
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| 57 | ld %f11,SC_FPRS+88(%r1) |
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| 58 | ld %f12,SC_FPRS+96(%r1) |
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| 59 | ld %f13,SC_FPRS+104(%r1) |
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| 60 | ld %f14,SC_FPRS+112(%r1) |
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| 61 | ld %f15,SC_FPRS+120(%r1) |
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| 62 | |
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| 63 | /* Don't touch %a0 and %a1, used for thread purposes. */ |
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| 64 | lam %a2,%a15,SC_ACRS+8(%r1) |
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| 65 | |
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| 66 | /* Load general purpose registers. */ |
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| 67 | lmg %r0,%r15,SC_GPRS(%r1) |
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| 68 | |
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| 69 | /* Return. */ |
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| 70 | br %r14 |
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| 71 | END(__setcontext) |
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| 72 | |
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| 73 | weak_alias (__setcontext, setcontext) |
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| 74 | |
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