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/*
* Copyright (C) 2010 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.
* Do not modify this value or you will break the ABI !
*
* This value comes from the original OpenBSD ARM-specific header
* that was replaced by this one.
*/
#define _JBLEN 64
/* According to the ARM AAPCS document, we only need to save
* the following registers:
*
* Core r4-r14
*
* VFP d8-d15 (see section 5.1.2.1)
*
* Registers s16-s31 (d8-d15, q4-q7) must be preserved across subroutine
* calls; registers s0-s15 (d0-d7, q0-q3) do not need to be preserved
* (and can be used for passing arguments or returning results in standard
* procedure-call variants). Registers d16-d31 (q8-q15), if present, do
* not need to be preserved.
*
* FPSCR saved because GLibc does saves it too.
*
*/
/* The internal structure of a jmp_buf is totally private.
* Current layout (may change in the future):
*
* word name description
* 0 magic magic number
* 1 sigmask signal mask (not used with _setjmp / _longjmp)
* 2 float_base base of float registers (d8 to d15)
* 18 float_state floating-point status and control register
* 19 core_base base of core registers (r4 to r14)
* 30 reserved reserved entries (room to grow)
* 64
*
* NOTE: float_base must be at an even word index, since the
* FP registers will be loaded/stored with instructions
* that expect 8-byte alignment.
*/
#define _JB_MAGIC 0
#define _JB_SIGMASK (_JB_MAGIC+1)
#define _JB_FLOAT_BASE (_JB_SIGMASK+1)
#define _JB_FLOAT_STATE (_JB_FLOAT_BASE + (15-8+1)*2)
#define _JB_CORE_BASE (_JB_FLOAT_STATE+1)
#define _JB_MAGIC__SETJMP 0x4278f500
#define _JB_MAGIC_SETJMP 0x4278f501
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