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/* Save current context. C-SKY ABIV2 version.
Copyright (C) 2018 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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include "ucontext_i.h"
/* int getcontext (ucontext_t *ucp) */
ENTRY (__getcontext)
/* No need to save r2-r7 or a0-a3. */
mov t0, a0
addi a0, MCONTEXT_CSKY_R4
stm r4-r13, (a0) /* Save r4-r13. */
stw sp, (t0, MCONTEXT_CSKY_SP) /* Save sp. */
stw r15, (t0, MCONTEXT_CSKY_LR) /* Save lr. */
stw r15, (t0, MCONTEXT_CSKY_PC) /* Return to PC. */
addi a0, t0, MCONTEXT_CSKY_R16
stm r16-r31, (a0) /* Save r16-r31. */
movi a0, 0
stw a0, (t0, MCONTEXT_CSKY_A0) /* Return zero. */
subi sp, 8
stw t0, (sp, 0) /* Save t0 after "save sp". */
/* __sigprocmask (SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
movi a0, SIG_BLOCK
movi a1, 0
addi a2, t0, UCONTEXT_SIGMASK
/* Do sigprocmask syscall. */
#ifdef __PIC__
subi sp, 8
stw gb, (sp, 0)
grs gb, .Lgetpc
.Lgetpc:
lrw a3, .Lgetpc@GOTPC
addu gb, gb, a3
lrw a3, __sigprocmask@PLT
ldr.w a3, (gb, a3 << 0)
jsr a3
ldw gb, (sp, 0)
addi sp, 8
#else
jsri __sigprocmask
#endif
ldw t0, (sp, 0)
addi sp, 8
/* Restore r15 for sigprocmask changes. */
ldw r15, (t0, MCONTEXT_CSKY_LR)
movi a0, 0 /* Return 0. */
jmp r15
END (__getcontext)
weak_alias (__getcontext, getcontext)
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