/* Save current context.

   Copyright (C) 2015-2018 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)

   Returns 0 on success -1 and errno on failure.

 */

	.text

ENTRY(__getcontext)

	stw	r16, (UCONTEXT_MCONTEXT + 16*4)(r4)

	stw	r17, (UCONTEXT_MCONTEXT + 17*4)(r4)

	stw	r18, (UCONTEXT_MCONTEXT + 18*4)(r4)

	stw	r19, (UCONTEXT_MCONTEXT + 19*4)(r4)

	stw	r20, (UCONTEXT_MCONTEXT + 20*4)(r4)

	stw	r21, (UCONTEXT_MCONTEXT + 21*4)(r4)

	stw	r22, (UCONTEXT_MCONTEXT + 22*4)(r4)

	stw	ra,  (UCONTEXT_MCONTEXT + 24*4)(r4)

	stw	fp,  (UCONTEXT_MCONTEXT + 25*4)(r4)

	stw	gp,  (UCONTEXT_MCONTEXT + 26*4)(r4)

	/* Store return address at place for EA.  */

	stw	ra,  (UCONTEXT_MCONTEXT + 28*4)(r4)

	stw	sp,  (UCONTEXT_MCONTEXT + 29*4)(r4)

	/* Store zero for return success.  */

	stw	zero, (UCONTEXT_MCONTEXT + 2*4)(r4)

	/* Store value "1" at uc_flags to recognize as getcontext created.  */

	movi	r2, 1

	stw	r2, UCONTEXT_FLAGS(r4)

	/* Store MCONTEXT_VERSION at first word of mcontext_t.  */

	movi	r2, MCONTEXT_VERSION

	stw	r2, UCONTEXT_MCONTEXT(r4)

	/* Get signal mask.  */

	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */

	movi	r7, _NSIG8

	addi	r6, r4, UCONTEXT_SIGMASK

	mov	r5, zero

	movi	r4, SIG_BLOCK

	movi	r2, SYS_ify (rt_sigprocmask)

	trap

	bne	r7, zero, SYSCALL_ERROR_LABEL

	mov	r2, zero

	ret

PSEUDO_END(__getcontext)

weak_alias(__getcontext, getcontext)