/thirdparty/breakpad/google_breakpad/common/minidump_cpu_arm.h

  1/* Copyright (c) 2009, Google Inc.
  2 * All rights reserved.
  3 *
  4 * Redistribution and use in source and binary forms, with or without
  5 * modification, are permitted provided that the following conditions are
  6 * met:
  7 *
  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
 11 * copyright notice, this list of conditions and the following disclaimer
 12 * in the documentation and/or other materials provided with the
 13 * distribution.
 14 *     * Neither the name of Google Inc. nor the names of its
 15 * contributors may be used to endorse or promote products derived from
 16 * this software without specific prior written permission.
 17 *
 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 29
 30/* minidump_format.h: A cross-platform reimplementation of minidump-related
 31 * portions of DbgHelp.h from the Windows Platform SDK.
 32 *
 33 * (This is C99 source, please don't corrupt it with C++.)
 34 *
 35 * This file contains the necessary definitions to read minidump files
 36 * produced on ARM.  These files may be read on any platform provided
 37 * that the alignments of these structures on the processing system are
 38 * identical to the alignments of these structures on the producing system.
 39 * For this reason, precise-sized types are used.  The structures defined
 40 * by this file have been laid out to minimize alignment problems by
 41 * ensuring that all members are aligned on their natural boundaries.
 42 * In some cases, tail-padding may be significant when different ABIs specify
 43 * different tail-padding behaviors.  To avoid problems when reading or
 44 * writing affected structures, MD_*_SIZE macros are provided where needed,
 45 * containing the useful size of the structures without padding.
 46 *
 47 * Structures that are defined by Microsoft to contain a zero-length array
 48 * are instead defined here to contain an array with one element, as
 49 * zero-length arrays are forbidden by standard C and C++.  In these cases,
 50 * *_minsize constants are provided to be used in place of sizeof.  For a
 51 * cleaner interface to these sizes when using C++, see minidump_size.h.
 52 *
 53 * These structures are also sufficient to populate minidump files.
 54 *
 55 * Because precise data type sizes are crucial for this implementation to
 56 * function properly and portably, a set of primitive types with known sizes
 57 * are used as the basis of each structure defined by this file.
 58 *
 59 * Author: Julian Seward
 60 */
 61
 62/*
 63 * ARM support
 64 */
 65
 66#ifndef GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__
 67#define GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__
 68
 69#define MD_FLOATINGSAVEAREA_ARM_FPR_COUNT 32
 70#define MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT 8
 71
 72/*
 73 * Note that these structures *do not* map directly to the CONTEXT
 74 * structure defined in WinNT.h in the Windows Mobile SDK. That structure
 75 * does not accomodate VFPv3, and I'm unsure if it was ever used in the
 76 * wild anyway, as Windows CE only seems to produce "cedumps" which
 77 * are not exactly minidumps.
 78 */
 79typedef struct {
 80  u_int64_t	fpscr;      /* FPU status register */
 81
 82  /* 32 64-bit floating point registers, d0 .. d31. */
 83  u_int64_t	regs[MD_FLOATINGSAVEAREA_ARM_FPR_COUNT];
 84
 85  /* Miscellaneous control words */
 86  u_int32_t     extra[MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT];
 87} MDFloatingSaveAreaARM;
 88
 89#define MD_CONTEXT_ARM_GPR_COUNT 16
 90
 91typedef struct {
 92  /* The next field determines the layout of the structure, and which parts
 93   * of it are populated
 94   */
 95  u_int32_t	context_flags;
 96
 97  /* 16 32-bit integer registers, r0 .. r15
 98   * Note the following fixed uses:
 99   *   r13 is the stack pointer
100   *   r14 is the link register
101   *   r15 is the program counter
102   */
103  u_int32_t     iregs[MD_CONTEXT_ARM_GPR_COUNT];
104
105  /* CPSR (flags, basically): 32 bits:
106        bit 31 - N (negative)
107        bit 30 - Z (zero)
108        bit 29 - C (carry)
109        bit 28 - V (overflow)
110        bit 27 - Q (saturation flag, sticky)
111     All other fields -- ignore */
112  u_int32_t    cpsr;
113
114  /* The next field is included with MD_CONTEXT_ARM_FLOATING_POINT */
115  MDFloatingSaveAreaARM float_save;
116
117} MDRawContextARM;
118
119/* Indices into iregs for registers with a dedicated or conventional 
120 * purpose.
121 */
122enum MDARMRegisterNumbers {
123  MD_CONTEXT_ARM_REG_IOS_FP = 7,
124  MD_CONTEXT_ARM_REG_FP     = 11,
125  MD_CONTEXT_ARM_REG_SP     = 13,
126  MD_CONTEXT_ARM_REG_LR     = 14,
127  MD_CONTEXT_ARM_REG_PC     = 15
128};
129
130/* For (MDRawContextARM).context_flags.  These values indicate the type of
131 * context stored in the structure. */
132/* CONTEXT_ARM from the Windows CE 5.0 SDK. This value isn't correct
133 * because this bit can be used for flags. Presumably this value was
134 * never actually used in minidumps, but only in "CEDumps" which
135 * are a whole parallel minidump file format for Windows CE.
136 * Therefore, Breakpad defines its own value for ARM CPUs.
137 */
138#define MD_CONTEXT_ARM_OLD               0x00000040
139/* This value was chosen to avoid likely conflicts with MD_CONTEXT_*
140 * for other CPUs. */
141#define MD_CONTEXT_ARM                   0x40000000
142#define MD_CONTEXT_ARM_INTEGER           (MD_CONTEXT_ARM | 0x00000002)
143#define MD_CONTEXT_ARM_FLOATING_POINT    (MD_CONTEXT_ARM | 0x00000004)
144
145#define MD_CONTEXT_ARM_FULL              (MD_CONTEXT_ARM_INTEGER | \
146                                          MD_CONTEXT_ARM_FLOATING_POINT)
147
148#define MD_CONTEXT_ARM_ALL               (MD_CONTEXT_ARM_INTEGER | \
149                                          MD_CONTEXT_ARM_FLOATING_POINT)
150
151#endif  /* GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__ */