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/* minidump_format.h: A cross-platform reimplementation of minidump-related
* portions of DbgHelp.h from the Windows Platform SDK.
*
* (This is C99 source, please don't corrupt it with C++.)
*
* This file contains the necessary definitions to read minidump files
* produced on ARM. These files may be read on any platform provided
* that the alignments of these structures on the processing system are
* identical to the alignments of these structures on the producing system.
* For this reason, precise-sized types are used. The structures defined
* by this file have been laid out to minimize alignment problems by
* ensuring that all members are aligned on their natural boundaries.
* In some cases, tail-padding may be significant when different ABIs specify
* different tail-padding behaviors. To avoid problems when reading or
* writing affected structures, MD_*_SIZE macros are provided where needed,
* containing the useful size of the structures without padding.
*
* Structures that are defined by Microsoft to contain a zero-length array
* are instead defined here to contain an array with one element, as
* zero-length arrays are forbidden by standard C and C++. In these cases,
* *_minsize constants are provided to be used in place of sizeof. For a
* cleaner interface to these sizes when using C++, see minidump_size.h.
*
* These structures are also sufficient to populate minidump files.
*
* Because precise data type sizes are crucial for this implementation to
* function properly and portably, a set of primitive types with known sizes
* are used as the basis of each structure defined by this file.
*
* Author: Julian Seward
*/
/*
* ARM support
*/
#ifndef GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__
#define GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__
#define MD_FLOATINGSAVEAREA_ARM_FPR_COUNT 32
#define MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT 8
/*
* Note that these structures *do not* map directly to the CONTEXT
* structure defined in WinNT.h in the Windows Mobile SDK. That structure
* does not accomodate VFPv3, and I'm unsure if it was ever used in the
* wild anyway, as Windows CE only seems to produce "cedumps" which
* are not exactly minidumps.
*/
typedef struct {
uint64_t fpscr; /* FPU status register */
/* 32 64-bit floating point registers, d0 .. d31. */
uint64_t regs[MD_FLOATINGSAVEAREA_ARM_FPR_COUNT];
/* Miscellaneous control words */
uint32_t extra[MD_FLOATINGSAVEAREA_ARM_FPEXTRA_COUNT];
} MDFloatingSaveAreaARM;
#define MD_CONTEXT_ARM_GPR_COUNT 16
typedef struct {
/* The next field determines the layout of the structure, and which parts
* of it are populated
*/
uint32_t context_flags;
/* 16 32-bit integer registers, r0 .. r15
* Note the following fixed uses:
* r13 is the stack pointer
* r14 is the link register
* r15 is the program counter
*/
uint32_t iregs[MD_CONTEXT_ARM_GPR_COUNT];
/* CPSR (flags, basically): 32 bits:
bit 31 - N (negative)
bit 30 - Z (zero)
bit 29 - C (carry)
bit 28 - V (overflow)
bit 27 - Q (saturation flag, sticky)
All other fields -- ignore */
uint32_t cpsr;
/* The next field is included with MD_CONTEXT_ARM_FLOATING_POINT */
MDFloatingSaveAreaARM float_save;
} MDRawContextARM;
/* Indices into iregs for registers with a dedicated or conventional
* purpose.
*/
enum MDARMRegisterNumbers {
MD_CONTEXT_ARM_REG_IOS_FP = 7,
MD_CONTEXT_ARM_REG_FP = 11,
MD_CONTEXT_ARM_REG_SP = 13,
MD_CONTEXT_ARM_REG_LR = 14,
MD_CONTEXT_ARM_REG_PC = 15
};
/* For (MDRawContextARM).context_flags. These values indicate the type of
* context stored in the structure. */
/* CONTEXT_ARM from the Windows CE 5.0 SDK. This value isn't correct
* because this bit can be used for flags. Presumably this value was
* never actually used in minidumps, but only in "CEDumps" which
* are a whole parallel minidump file format for Windows CE.
* Therefore, Breakpad defines its own value for ARM CPUs.
*/
#define MD_CONTEXT_ARM_OLD 0x00000040
/* This value was chosen to avoid likely conflicts with MD_CONTEXT_*
* for other CPUs. */
#define MD_CONTEXT_ARM 0x40000000
#define MD_CONTEXT_ARM_INTEGER (MD_CONTEXT_ARM | 0x00000002)
#define MD_CONTEXT_ARM_FLOATING_POINT (MD_CONTEXT_ARM | 0x00000004)
#define MD_CONTEXT_ARM_FULL (MD_CONTEXT_ARM_INTEGER | \
MD_CONTEXT_ARM_FLOATING_POINT)
#define MD_CONTEXT_ARM_ALL (MD_CONTEXT_ARM_INTEGER | \
MD_CONTEXT_ARM_FLOATING_POINT)
#endif /* GOOGLE_BREAKPAD_COMMON_MINIDUMP_CPU_ARM_H__ */