1 /* Save current context.
2 Copyright (C) 2005-2015 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 <http://www.gnu.org/licenses/>. */
21 #include "ucontext_i.h"
23 /* int __getcontext (ucontext_t *uc); */
29 /* Return value of getcontext. R0 is the only register whose
30 value is not preserved. */
46 /* Save T flag to SR. */
51 /* The return address of getcontext is the restart pc. */
65 /* We need 2 add instruction because oFPUL+4 > 127. */
104 #endif /* __SH_FPU_ANY__ */
106 /* sigprocmask (SIG_BLOCK, NULL, &uc->uc_sigmask). */
108 /* We need 2 add instruction because oSIGMASK > 127. */
109 add #(oSIGMASK/2), r6
110 add #(oSIGMASK/2), r6
113 mov #+SYS_ify(sigprocmask), r3
118 not r1, r1 // r1=0 means r0 = -1 to -4095
119 tst r1, r1 // i.e. error in linux
122 SYSCALL_ERROR_HANDLER
124 /* All done, return 0 for success. */
130 PSEUDO_END(__getcontext)
132 weak_alias (__getcontext, getcontext)