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/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* machine/setjmp.h: machine dependent setjmp-related information.
*/
/* _JBLEN is the size of a jmp_buf in longs(64bit on AArch64) */
#define _JBLEN 32
/* According to AARCH64 PCS document we need to save the following
* registers:
*
* Core x19 - x30, sp (see section 5.1.1)
* VFP d8 - d15 (see section 5.1.2)
*
* NOTE: All the registers saved here will have 64bit vales (except FPSR).
* AAPCS mandates that the higher part of q registers does not need to
* be saveved by the callee.
*/
/* The structure of jmp_buf for AArch64:
*
* NOTE: _JBLEN is the size of jmp_buf in longs(64bit on AArch64)! The table
* below computes the offsets in words(32bit).
*
* word name description
* 0 magic magic number
* 1 sigmask signal mask (not used with _setjmp / _longjmp)
* 2 core_base base of core registers (x19-x30, sp)
* 28 float_base base of float registers (d8-d15)
* 44 reserved reserved entries (room to grow)
* 64
*
*
* NOTE: The instructions that load/store core/vfp registers expect 8-byte
* alignment. Contrary to the previous setjmp header for ARM we do not
* need to save status/control registers for VFP (it is not a
* requirement for setjmp).
*/
#define _JB_MAGIC 0
#define _JB_SIGMASK (_JB_MAGIC+1)
#define _JB_CORE_BASE (_JB_SIGMASK+1)
#define _JB_FLOAT_BASE (_JB_CORE_BASE + (31-19+1)*2)
#define _JB_MAGIC__SETJMP 0x53657200
#define _JB_MAGIC_SETJMP 0x53657201
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