1 /* Save current context for ARC.
2 Copyright (C) 2020-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <https://www.gnu.org/licenses/>. */
19 #include "ucontext-macros.h"
21 /* int getcontext (ucontext_t *ucp)
22 Save machine context in @ucp and return 0 on success, -1 on error
23 - saves callee saved registers only
24 - layout mandated by uncontext_t:uc_mcontext (hence different from setjmp). */
28 /* Callee saved registers. */
29 add r2, r0, UCONTEXT_MCONTEXT
48 /* Save 0 in r0 placeholder to return 0 when this @ucp activated. */
52 /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8). */
54 add r2, r0, UCONTEXT_SIGMASK
57 mov r8, __NR_rt_sigprocmask
59 brhi r0, -1024, L (call_syscall_err)
61 mov r0, 0 /* Success, error handled in .Lcall_syscall_err. */
63 PSEUDO_END (__getcontext)
64 weak_alias (__getcontext, getcontext)