/* setjmp for ARM.

   Copyright (C) 1997-2018 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 <stap-probe.h>

#include <bits/setjmp.h>

#include <rtld-global-offsets.h>

#include <arm-features.h>

ENTRY (__sigsetjmp)

#ifdef PTR_MANGLE

	PTR_MANGLE_LOAD (a3, ip)

#endif

	mov	ip, r0

	/* setjmp probe expects sigsetjmp first argument (4@r0), second

	   argument (-4@r1), and target address (4@r14), respectively.  */

	LIBC_PROBE (setjmp, 3, 4@r0, -4@r1, 4@r14)

	/* Save sp and lr */

#ifdef PTR_MANGLE

	mov	a4, sp

	PTR_MANGLE2 (a4, a4, a3)

	str	a4, [ip], #4

	PTR_MANGLE2 (a4, lr, a3)

	str	a4, [ip], #4

#else

	str	sp, [ip], #4

	str	lr, [ip], #4

#endif

	/* Save registers */

	stmia	ip!, JMP_BUF_REGLIST

#if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__

# define NEED_HWCAP 1

#endif

#ifdef NEED_HWCAP

	/* Check if we have a VFP unit.  */

# if IS_IN (rtld)

	LDST_PCREL (ldr, a3, a4, \

		    C_SYMBOL_NAME(_rtld_local_ro) \

		    + RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)

# else

#  ifdef SHARED

	LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_rtld_global_ro), \

		    RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)

#  else

	LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_dl_hwcap), 0)

#  endif

# endif

#endif

#ifdef __SOFTFP__

	tst	a3, #HWCAP_ARM_VFP

	beq	.Lno_vfp

#endif

	/* Store the VFP registers.

	   Don't use VFP instructions directly because this code

	   is used in non-VFP multilibs.  */

	/* Following instruction is vstmia ip!, {d8-d15}.  */

	stc	p11, cr8, [ip], #64

.Lno_vfp:

#ifndef ARM_ASSUME_NO_IWMMXT

	tst	a3, #HWCAP_ARM_IWMMXT

	beq	.Lno_iwmmxt

	/* Save the call-preserved iWMMXt registers.  */

	/* Following instructions are wstrd wr10, [ip], #8 (etc.)  */

	stcl	p1, cr10, [r12], #8

	stcl	p1, cr11, [r12], #8

	stcl	p1, cr12, [r12], #8

	stcl	p1, cr13, [r12], #8

	stcl	p1, cr14, [r12], #8

	stcl	p1, cr15, [r12], #8

.Lno_iwmmxt:

#endif

	/* Make a tail call to __sigjmp_save; it takes the same args.  */

	B	PLTJMP(C_SYMBOL_NAME(__sigjmp_save))

END (__sigsetjmp)

hidden_def (__sigsetjmp)