1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * machine/setjmp.h: machine dependent setjmp-related information. 31 */ 32 33 /* _JBLEN is the size of a jmp_buf in longs(64bit on AArch64) */ 34 #define _JBLEN 32 35 36 /* According to AARCH64 PCS document we need to save the following 37 * registers: 38 * 39 * Core x19 - x30, sp (see section 5.1.1) 40 * VFP d8 - d15 (see section 5.1.2) 41 * 42 * NOTE: All the registers saved here will have 64bit vales (except FPSR). 43 * AAPCS mandates that the higher part of q registers does not need to 44 * be saveved by the callee. 45 */ 46 47 /* The structure of jmp_buf for AArch64: 48 * 49 * NOTE: _JBLEN is the size of jmp_buf in longs(64bit on AArch64)! The table 50 * below computes the offsets in words(32bit). 51 * 52 * word name description 53 * 0 magic magic number 54 * 1 sigmask signal mask (not used with _setjmp / _longjmp) 55 * 2 core_base base of core registers (x19-x30, sp) 56 * 28 float_base base of float registers (d8-d15) 57 * 44 reserved reserved entries (room to grow) 58 * 64 59 * 60 * 61 * NOTE: The instructions that load/store core/vfp registers expect 8-byte 62 * alignment. Contrary to the previous setjmp header for ARM we do not 63 * need to save status/control registers for VFP (it is not a 64 * requirement for setjmp). 65 */ 66 67 #define _JB_MAGIC 0 68 #define _JB_SIGMASK (_JB_MAGIC+1) 69 #define _JB_CORE_BASE (_JB_SIGMASK+1) 70 #define _JB_FLOAT_BASE (_JB_CORE_BASE + (31-19+1)*2) 71 72 #define _JB_MAGIC__SETJMP 0x53657200 73 #define _JB_MAGIC_SETJMP 0x53657201 74