1/* Copyright (C) 2001-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19#include <features.h>
20
21#include "ucontext_i.h"
22
23/*  __setcontext (const ucontext_t *ucp)
24
25  Restores the machine context in UCP and thereby resumes execution
26  in that context.
27
28  This implementation is intended to be used for *synchronous* context
29  switches only.  Therefore, it does not have to restore anything
30  other than the PRESERVED state.  */
31
32ENTRY(__setcontext)
33	lgr	%r1,%r2
34
35	/* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL).  */
36	la      %r2,SIG_SETMASK
37	la	%r3,SC_MASK(%r1)
38	slgr	%r4,%r4
39	lghi	%r5,_NSIG8
40	svc	SYS_ify(rt_sigprocmask)
41
42	/* Load fpu context.  */
43	lfpc	SC_FPC(%r1)
44	ld	%f0,SC_FPRS(%r1)
45	ld      %f1,SC_FPRS+8(%r1)
46	ld      %f2,SC_FPRS+16(%r1)
47	ld      %f3,SC_FPRS+24(%r1)
48	ld      %f4,SC_FPRS+32(%r1)
49	ld      %f5,SC_FPRS+40(%r1)
50	ld      %f6,SC_FPRS+48(%r1)
51	ld      %f7,SC_FPRS+56(%r1)
52	ld      %f8,SC_FPRS+64(%r1)
53	ld      %f9,SC_FPRS+72(%r1)
54	ld      %f10,SC_FPRS+80(%r1)
55	ld      %f11,SC_FPRS+88(%r1)
56	ld      %f12,SC_FPRS+96(%r1)
57	ld      %f13,SC_FPRS+104(%r1)
58	ld      %f14,SC_FPRS+112(%r1)
59	ld      %f15,SC_FPRS+120(%r1)
60
61	/* Don't touch %a0 and %a1, used for thread purposes.  */
62	lam     %a2,%a15,SC_ACRS+8(%r1)
63
64	/* Load general purpose registers.  */
65	lmg	%r0,%r15,SC_GPRS(%r1)
66
67	/* Return.  */
68	br	%r14
69END(__setcontext)
70
71weak_alias (__setcontext, setcontext)
72