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/* Save current context.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include "ucontext-macros.h"
/* int getcontext (ucontext_t *ucp) */
.text
LEAF (__getcontext)
SAVE_INT_REG (ra, 1, a0)
SAVE_INT_REG (sp, 3, a0)
SAVE_INT_REG (zero, 4, a0) /* return 0 by overwriting a0. */
SAVE_INT_REG (x, 21, a0)
SAVE_INT_REG (fp, 22, a0)
SAVE_INT_REG (s0, 23, a0)
SAVE_INT_REG (s1, 24, a0)
SAVE_INT_REG (s2, 25, a0)
SAVE_INT_REG (s3, 26, a0)
SAVE_INT_REG (s4, 27, a0)
SAVE_INT_REG (s5, 28, a0)
SAVE_INT_REG (s6, 29, a0)
SAVE_INT_REG (s7, 30, a0)
SAVE_INT_REG (s8, 31, a0)
st.d ra, a0, MCONTEXT_PC
/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
li.d a3, _NSIG8
li.d a2, UCONTEXT_SIGMASK
add.d a2, a2, a0
ori a1, zero,0
li.d a0, SIG_BLOCK
li.d a7, SYS_ify (rt_sigprocmask)
syscall 0
blt a0, zero, 99f
jirl $r0, $r1, 0
99:
b __syscall_error
PSEUDO_END (__getcontext)
weak_alias (__getcontext, getcontext)
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