libunwind.h

//===---------------------------- libunwind.h -----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//
// Compatible with libunwind API documented at:
//   http://www.nongnu.org/libunwind/man/libunwind(3).html
//
//===----------------------------------------------------------------------===//

#ifndef __LIBUNWIND__
#define __LIBUNWIND__

#include <__libunwind_config.h>

#include <stdint.h>
#include <stddef.h>

#ifdef __APPLE__
  #if __clang__
    #if __has_include(<Availability.h>)
      #include <Availability.h>
    #endif
  #elif __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
    #include <Availability.h>
  #endif

  #ifdef __arm__
     #define LIBUNWIND_AVAIL __attribute__((unavailable))
  #elif defined(__OSX_AVAILABLE_STARTING)
    #define LIBUNWIND_AVAIL __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_5_0)
  #else
    #include <AvailabilityMacros.h>
    #ifdef AVAILABLE_MAC_OS_X_VERSION_10_6_AND_LATER
      #define LIBUNWIND_AVAIL AVAILABLE_MAC_OS_X_VERSION_10_6_AND_LATER
    #else
      #define LIBUNWIND_AVAIL __attribute__((unavailable))
    #endif
  #endif
#else
  #define LIBUNWIND_AVAIL
#endif

/* error codes */
enum {
  UNW_ESUCCESS      = 0,     /* no error */
  UNW_EUNSPEC       = -6540, /* unspecified (general) error */
  UNW_ENOMEM        = -6541, /* out of memory */
  UNW_EBADREG       = -6542, /* bad register number */
  UNW_EREADONLYREG  = -6543, /* attempt to write read-only register */
  UNW_ESTOPUNWIND   = -6544, /* stop unwinding */
  UNW_EINVALIDIP    = -6545, /* invalid IP */
  UNW_EBADFRAME     = -6546, /* bad frame */
  UNW_EINVAL        = -6547, /* unsupported operation or bad value */
  UNW_EBADVERSION   = -6548, /* unwind info has unsupported version */
  UNW_ENOINFO       = -6549  /* no unwind info found */
#if defined(_LIBUNWIND_TARGET_AARCH64) && !defined(_LIBUNWIND_IS_NATIVE_ONLY)
  , UNW_ECROSSRASIGNING = -6550 /* cross unwind with return address signing */
#endif
};

struct unw_context_t {
  uint64_t data[_LIBUNWIND_CONTEXT_SIZE];
};
typedef struct unw_context_t unw_context_t;

struct unw_cursor_t {
  uint64_t data[_LIBUNWIND_CURSOR_SIZE];
};
typedef struct unw_cursor_t unw_cursor_t;

typedef struct unw_addr_space *unw_addr_space_t;

typedef int unw_regnum_t;
typedef uintptr_t unw_word_t;
#if defined(__arm__) && !defined(__ARM_DWARF_EH__)
typedef uint64_t unw_fpreg_t;
#else
typedef double unw_fpreg_t;
#endif

struct unw_proc_info_t {
  unw_word_t  start_ip;         /* start address of function */
  unw_word_t  end_ip;           /* address after end of function */
  unw_word_t  lsda;             /* address of language specific data area, */
                                /*  or zero if not used */
  unw_word_t  handler;          /* personality routine, or zero if not used */
  unw_word_t  gp;               /* not used */
  unw_word_t  flags;            /* not used */
  uint32_t    format;           /* compact unwind encoding, or zero if none */
  uint32_t    unwind_info_size; /* size of DWARF unwind info, or zero if none */
  unw_word_t  unwind_info;      /* address of DWARF unwind info, or zero */
  unw_word_t  extra;            /* mach_header of mach-o image containing func */
};
typedef struct unw_proc_info_t unw_proc_info_t;

#ifdef __cplusplus
extern "C" {
#endif

extern int unw_getcontext(unw_context_t *) LIBUNWIND_AVAIL;
extern int unw_init_local(unw_cursor_t *, unw_context_t *) LIBUNWIND_AVAIL;
extern int unw_step(unw_cursor_t *) LIBUNWIND_AVAIL;
extern int unw_get_reg(unw_cursor_t *, unw_regnum_t, unw_word_t *) LIBUNWIND_AVAIL;
extern int unw_get_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t *) LIBUNWIND_AVAIL;
extern int unw_set_reg(unw_cursor_t *, unw_regnum_t, unw_word_t) LIBUNWIND_AVAIL;
extern int unw_set_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t)  LIBUNWIND_AVAIL;
extern int unw_resume(unw_cursor_t *) LIBUNWIND_AVAIL;

#ifdef __arm__
/* Save VFP registers in FSTMX format (instead of FSTMD). */
extern void unw_save_vfp_as_X(unw_cursor_t *) LIBUNWIND_AVAIL;
#endif


extern const char *unw_regname(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
extern int unw_get_proc_info(unw_cursor_t *, unw_proc_info_t *) LIBUNWIND_AVAIL;
extern int unw_is_fpreg(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
extern int unw_is_signal_frame(unw_cursor_t *) LIBUNWIND_AVAIL;
extern int unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *) LIBUNWIND_AVAIL;
//extern int       unw_get_save_loc(unw_cursor_t*, int, unw_save_loc_t*);

extern unw_addr_space_t unw_local_addr_space;

#ifdef __cplusplus
}
#endif

// architecture independent register numbers
enum {
  UNW_REG_IP = -1, // instruction pointer
  UNW_REG_SP = -2, // stack pointer
};

// 32-bit x86 registers
enum {
  UNW_X86_EAX = 0,
  UNW_X86_ECX = 1,
  UNW_X86_EDX = 2,
  UNW_X86_EBX = 3,
  UNW_X86_EBP = 4,
  UNW_X86_ESP = 5,
  UNW_X86_ESI = 6,
  UNW_X86_EDI = 7
};

// 64-bit x86_64 registers
enum {
  UNW_X86_64_RAX = 0,
  UNW_X86_64_RDX = 1,
  UNW_X86_64_RCX = 2,
  UNW_X86_64_RBX = 3,
  UNW_X86_64_RSI = 4,
  UNW_X86_64_RDI = 5,
  UNW_X86_64_RBP = 6,
  UNW_X86_64_RSP = 7,
  UNW_X86_64_R8  = 8,
  UNW_X86_64_R9  = 9,
  UNW_X86_64_R10 = 10,
  UNW_X86_64_R11 = 11,
  UNW_X86_64_R12 = 12,
  UNW_X86_64_R13 = 13,
  UNW_X86_64_R14 = 14,
  UNW_X86_64_R15 = 15,
  UNW_X86_64_RIP = 16,
  UNW_X86_64_XMM0 = 17,
  UNW_X86_64_XMM1 = 18,
  UNW_X86_64_XMM2 = 19,
  UNW_X86_64_XMM3 = 20,
  UNW_X86_64_XMM4 = 21,
  UNW_X86_64_XMM5 = 22,
  UNW_X86_64_XMM6 = 23,
  UNW_X86_64_XMM7 = 24,
  UNW_X86_64_XMM8 = 25,
  UNW_X86_64_XMM9 = 26,
  UNW_X86_64_XMM10 = 27,
  UNW_X86_64_XMM11 = 28,
  UNW_X86_64_XMM12 = 29,
  UNW_X86_64_XMM13 = 30,
  UNW_X86_64_XMM14 = 31,
  UNW_X86_64_XMM15 = 32,
};


// 32-bit ppc register numbers
enum {
  UNW_PPC_R0  = 0,
  UNW_PPC_R1  = 1,
  UNW_PPC_R2  = 2,
  UNW_PPC_R3  = 3,
  UNW_PPC_R4  = 4,
  UNW_PPC_R5  = 5,
  UNW_PPC_R6  = 6,
  UNW_PPC_R7  = 7,
  UNW_PPC_R8  = 8,
  UNW_PPC_R9  = 9,
  UNW_PPC_R10 = 10,
  UNW_PPC_R11 = 11,
  UNW_PPC_R12 = 12,
  UNW_PPC_R13 = 13,
  UNW_PPC_R14 = 14,
  UNW_PPC_R15 = 15,
  UNW_PPC_R16 = 16,
  UNW_PPC_R17 = 17,
  UNW_PPC_R18 = 18,
  UNW_PPC_R19 = 19,
  UNW_PPC_R20 = 20,
  UNW_PPC_R21 = 21,
  UNW_PPC_R22 = 22,
  UNW_PPC_R23 = 23,
  UNW_PPC_R24 = 24,
  UNW_PPC_R25 = 25,
  UNW_PPC_R26 = 26,
  UNW_PPC_R27 = 27,
  UNW_PPC_R28 = 28,
  UNW_PPC_R29 = 29,
  UNW_PPC_R30 = 30,
  UNW_PPC_R31 = 31,
  UNW_PPC_F0  = 32,
  UNW_PPC_F1  = 33,
  UNW_PPC_F2  = 34,
  UNW_PPC_F3  = 35,
  UNW_PPC_F4  = 36,
  UNW_PPC_F5  = 37,
  UNW_PPC_F6  = 38,
  UNW_PPC_F7  = 39,
  UNW_PPC_F8  = 40,
  UNW_PPC_F9  = 41,
  UNW_PPC_F10 = 42,
  UNW_PPC_F11 = 43,
  UNW_PPC_F12 = 44,
  UNW_PPC_F13 = 45,
  UNW_PPC_F14 = 46,
  UNW_PPC_F15 = 47,
  UNW_PPC_F16 = 48,
  UNW_PPC_F17 = 49,
  UNW_PPC_F18 = 50,
  UNW_PPC_F19 = 51,
  UNW_PPC_F20 = 52,
  UNW_PPC_F21 = 53,
  UNW_PPC_F22 = 54,
  UNW_PPC_F23 = 55,
  UNW_PPC_F24 = 56,
  UNW_PPC_F25 = 57,
  UNW_PPC_F26 = 58,
  UNW_PPC_F27 = 59,
  UNW_PPC_F28 = 60,
  UNW_PPC_F29 = 61,
  UNW_PPC_F30 = 62,
  UNW_PPC_F31 = 63,
  UNW_PPC_MQ  = 64,
  UNW_PPC_LR  = 65,
  UNW_PPC_CTR = 66,
  UNW_PPC_AP  = 67,
  UNW_PPC_CR0 = 68,
  UNW_PPC_CR1 = 69,
  UNW_PPC_CR2 = 70,
  UNW_PPC_CR3 = 71,
  UNW_PPC_CR4 = 72,
  UNW_PPC_CR5 = 73,
  UNW_PPC_CR6 = 74,
  UNW_PPC_CR7 = 75,
  UNW_PPC_XER = 76,
  UNW_PPC_V0  = 77,
  UNW_PPC_V1  = 78,
  UNW_PPC_V2  = 79,
  UNW_PPC_V3  = 80,
  UNW_PPC_V4  = 81,
  UNW_PPC_V5  = 82,
  UNW_PPC_V6  = 83,
  UNW_PPC_V7  = 84,
  UNW_PPC_V8  = 85,
  UNW_PPC_V9  = 86,
  UNW_PPC_V10 = 87,
  UNW_PPC_V11 = 88,
  UNW_PPC_V12 = 89,
  UNW_PPC_V13 = 90,
  UNW_PPC_V14 = 91,
  UNW_PPC_V15 = 92,
  UNW_PPC_V16 = 93,
  UNW_PPC_V17 = 94,
  UNW_PPC_V18 = 95,
  UNW_PPC_V19 = 96,
  UNW_PPC_V20 = 97,
  UNW_PPC_V21 = 98,
  UNW_PPC_V22 = 99,
  UNW_PPC_V23 = 100,
  UNW_PPC_V24 = 101,
  UNW_PPC_V25 = 102,
  UNW_PPC_V26 = 103,
  UNW_PPC_V27 = 104,
  UNW_PPC_V28 = 105,
  UNW_PPC_V29 = 106,
  UNW_PPC_V30 = 107,
  UNW_PPC_V31 = 108,
  UNW_PPC_VRSAVE  = 109,
  UNW_PPC_VSCR    = 110,
  UNW_PPC_SPE_ACC = 111,
  UNW_PPC_SPEFSCR = 112
};

// 64-bit ppc register numbers
enum {
  UNW_PPC64_R0      = 0,
  UNW_PPC64_R1      = 1,
  UNW_PPC64_R2      = 2,
  UNW_PPC64_R3      = 3,
  UNW_PPC64_R4      = 4,
  UNW_PPC64_R5      = 5,
  UNW_PPC64_R6      = 6,
  UNW_PPC64_R7      = 7,
  UNW_PPC64_R8      = 8,
  UNW_PPC64_R9      = 9,
  UNW_PPC64_R10     = 10,
  UNW_PPC64_R11     = 11,
  UNW_PPC64_R12     = 12,
  UNW_PPC64_R13     = 13,
  UNW_PPC64_R14     = 14,
  UNW_PPC64_R15     = 15,
  UNW_PPC64_R16     = 16,
  UNW_PPC64_R17     = 17,
  UNW_PPC64_R18     = 18,
  UNW_PPC64_R19     = 19,
  UNW_PPC64_R20     = 20,
  UNW_PPC64_R21     = 21,
  UNW_PPC64_R22     = 22,
  UNW_PPC64_R23     = 23,
  UNW_PPC64_R24     = 24,
  UNW_PPC64_R25     = 25,
  UNW_PPC64_R26     = 26,
  UNW_PPC64_R27     = 27,
  UNW_PPC64_R28     = 28,
  UNW_PPC64_R29     = 29,
  UNW_PPC64_R30     = 30,
  UNW_PPC64_R31     = 31,
  UNW_PPC64_F0      = 32,
  UNW_PPC64_F1      = 33,
  UNW_PPC64_F2      = 34,
  UNW_PPC64_F3      = 35,
  UNW_PPC64_F4      = 36,
  UNW_PPC64_F5      = 37,
  UNW_PPC64_F6      = 38,
  UNW_PPC64_F7      = 39,
  UNW_PPC64_F8      = 40,
  UNW_PPC64_F9      = 41,
  UNW_PPC64_F10     = 42,
  UNW_PPC64_F11     = 43,
  UNW_PPC64_F12     = 44,
  UNW_PPC64_F13     = 45,
  UNW_PPC64_F14     = 46,
  UNW_PPC64_F15     = 47,
  UNW_PPC64_F16     = 48,
  UNW_PPC64_F17     = 49,
  UNW_PPC64_F18     = 50,
  UNW_PPC64_F19     = 51,
  UNW_PPC64_F20     = 52,
  UNW_PPC64_F21     = 53,
  UNW_PPC64_F22     = 54,
  UNW_PPC64_F23     = 55,
  UNW_PPC64_F24     = 56,
  UNW_PPC64_F25     = 57,
  UNW_PPC64_F26     = 58,
  UNW_PPC64_F27     = 59,
  UNW_PPC64_F28     = 60,
  UNW_PPC64_F29     = 61,
  UNW_PPC64_F30     = 62,
  UNW_PPC64_F31     = 63,
  // 64: reserved
  UNW_PPC64_LR      = 65,
  UNW_PPC64_CTR     = 66,
  // 67: reserved
  UNW_PPC64_CR0     = 68,
  UNW_PPC64_CR1     = 69,
  UNW_PPC64_CR2     = 70,
  UNW_PPC64_CR3     = 71,
  UNW_PPC64_CR4     = 72,
  UNW_PPC64_CR5     = 73,
  UNW_PPC64_CR6     = 74,
  UNW_PPC64_CR7     = 75,
  UNW_PPC64_XER     = 76,
  UNW_PPC64_V0      = 77,
  UNW_PPC64_V1      = 78,
  UNW_PPC64_V2      = 79,
  UNW_PPC64_V3      = 80,
  UNW_PPC64_V4      = 81,
  UNW_PPC64_V5      = 82,
  UNW_PPC64_V6      = 83,
  UNW_PPC64_V7      = 84,
  UNW_PPC64_V8      = 85,
  UNW_PPC64_V9      = 86,
  UNW_PPC64_V10     = 87,
  UNW_PPC64_V11     = 88,
  UNW_PPC64_V12     = 89,
  UNW_PPC64_V13     = 90,
  UNW_PPC64_V14     = 91,
  UNW_PPC64_V15     = 92,
  UNW_PPC64_V16     = 93,
  UNW_PPC64_V17     = 94,
  UNW_PPC64_V18     = 95,
  UNW_PPC64_V19     = 96,
  UNW_PPC64_V20     = 97,
  UNW_PPC64_V21     = 98,
  UNW_PPC64_V22     = 99,
  UNW_PPC64_V23     = 100,
  UNW_PPC64_V24     = 101,
  UNW_PPC64_V25     = 102,
  UNW_PPC64_V26     = 103,
  UNW_PPC64_V27     = 104,
  UNW_PPC64_V28     = 105,
  UNW_PPC64_V29     = 106,
  UNW_PPC64_V30     = 107,
  UNW_PPC64_V31     = 108,
  // 109, 111-113: OpenPOWER ELF V2 ABI: reserved
  // Borrowing VRSAVE number from PPC32.
  UNW_PPC64_VRSAVE  = 109,
  UNW_PPC64_VSCR    = 110,
  UNW_PPC64_TFHAR   = 114,
  UNW_PPC64_TFIAR   = 115,
  UNW_PPC64_TEXASR  = 116,
  UNW_PPC64_VS0     = UNW_PPC64_F0,
  UNW_PPC64_VS1     = UNW_PPC64_F1,
  UNW_PPC64_VS2     = UNW_PPC64_F2,
  UNW_PPC64_VS3     = UNW_PPC64_F3,
  UNW_PPC64_VS4     = UNW_PPC64_F4,
  UNW_PPC64_VS5     = UNW_PPC64_F5,
  UNW_PPC64_VS6     = UNW_PPC64_F6,
  UNW_PPC64_VS7     = UNW_PPC64_F7,
  UNW_PPC64_VS8     = UNW_PPC64_F8,
  UNW_PPC64_VS9     = UNW_PPC64_F9,
  UNW_PPC64_VS10    = UNW_PPC64_F10,
  UNW_PPC64_VS11    = UNW_PPC64_F11,
  UNW_PPC64_VS12    = UNW_PPC64_F12,
  UNW_PPC64_VS13    = UNW_PPC64_F13,
  UNW_PPC64_VS14    = UNW_PPC64_F14,
  UNW_PPC64_VS15    = UNW_PPC64_F15,
  UNW_PPC64_VS16    = UNW_PPC64_F16,
  UNW_PPC64_VS17    = UNW_PPC64_F17,
  UNW_PPC64_VS18    = UNW_PPC64_F18,
  UNW_PPC64_VS19    = UNW_PPC64_F19,
  UNW_PPC64_VS20    = UNW_PPC64_F20,
  UNW_PPC64_VS21    = UNW_PPC64_F21,
  UNW_PPC64_VS22    = UNW_PPC64_F22,
  UNW_PPC64_VS23    = UNW_PPC64_F23,
  UNW_PPC64_VS24    = UNW_PPC64_F24,
  UNW_PPC64_VS25    = UNW_PPC64_F25,
  UNW_PPC64_VS26    = UNW_PPC64_F26,
  UNW_PPC64_VS27    = UNW_PPC64_F27,
  UNW_PPC64_VS28    = UNW_PPC64_F28,
  UNW_PPC64_VS29    = UNW_PPC64_F29,
  UNW_PPC64_VS30    = UNW_PPC64_F30,
  UNW_PPC64_VS31    = UNW_PPC64_F31,
  UNW_PPC64_VS32    = UNW_PPC64_V0,
  UNW_PPC64_VS33    = UNW_PPC64_V1,
  UNW_PPC64_VS34    = UNW_PPC64_V2,
  UNW_PPC64_VS35    = UNW_PPC64_V3,
  UNW_PPC64_VS36    = UNW_PPC64_V4,
  UNW_PPC64_VS37    = UNW_PPC64_V5,
  UNW_PPC64_VS38    = UNW_PPC64_V6,
  UNW_PPC64_VS39    = UNW_PPC64_V7,
  UNW_PPC64_VS40    = UNW_PPC64_V8,
  UNW_PPC64_VS41    = UNW_PPC64_V9,
  UNW_PPC64_VS42    = UNW_PPC64_V10,
  UNW_PPC64_VS43    = UNW_PPC64_V11,
  UNW_PPC64_VS44    = UNW_PPC64_V12,
  UNW_PPC64_VS45    = UNW_PPC64_V13,
  UNW_PPC64_VS46    = UNW_PPC64_V14,
  UNW_PPC64_VS47    = UNW_PPC64_V15,
  UNW_PPC64_VS48    = UNW_PPC64_V16,
  UNW_PPC64_VS49    = UNW_PPC64_V17,
  UNW_PPC64_VS50    = UNW_PPC64_V18,
  UNW_PPC64_VS51    = UNW_PPC64_V19,
  UNW_PPC64_VS52    = UNW_PPC64_V20,
  UNW_PPC64_VS53    = UNW_PPC64_V21,
  UNW_PPC64_VS54    = UNW_PPC64_V22,
  UNW_PPC64_VS55    = UNW_PPC64_V23,
  UNW_PPC64_VS56    = UNW_PPC64_V24,
  UNW_PPC64_VS57    = UNW_PPC64_V25,
  UNW_PPC64_VS58    = UNW_PPC64_V26,
  UNW_PPC64_VS59    = UNW_PPC64_V27,
  UNW_PPC64_VS60    = UNW_PPC64_V28,
  UNW_PPC64_VS61    = UNW_PPC64_V29,
  UNW_PPC64_VS62    = UNW_PPC64_V30,
  UNW_PPC64_VS63    = UNW_PPC64_V31
};

// 64-bit ARM64 registers
enum {
  UNW_ARM64_X0  = 0,
  UNW_ARM64_X1  = 1,
  UNW_ARM64_X2  = 2,
  UNW_ARM64_X3  = 3,
  UNW_ARM64_X4  = 4,
  UNW_ARM64_X5  = 5,
  UNW_ARM64_X6  = 6,
  UNW_ARM64_X7  = 7,
  UNW_ARM64_X8  = 8,
  UNW_ARM64_X9  = 9,
  UNW_ARM64_X10 = 10,
  UNW_ARM64_X11 = 11,
  UNW_ARM64_X12 = 12,
  UNW_ARM64_X13 = 13,
  UNW_ARM64_X14 = 14,
  UNW_ARM64_X15 = 15,
  UNW_ARM64_X16 = 16,
  UNW_ARM64_X17 = 17,
  UNW_ARM64_X18 = 18,
  UNW_ARM64_X19 = 19,
  UNW_ARM64_X20 = 20,
  UNW_ARM64_X21 = 21,
  UNW_ARM64_X22 = 22,
  UNW_ARM64_X23 = 23,
  UNW_ARM64_X24 = 24,
  UNW_ARM64_X25 = 25,
  UNW_ARM64_X26 = 26,
  UNW_ARM64_X27 = 27,
  UNW_ARM64_X28 = 28,
  UNW_ARM64_X29 = 29,
  UNW_ARM64_FP  = 29,
  UNW_ARM64_X30 = 30,
  UNW_ARM64_LR  = 30,
  UNW_ARM64_X31 = 31,
  UNW_ARM64_SP  = 31,
  // reserved block
  UNW_ARM64_RA_SIGN_STATE = 34,
  // reserved block
  UNW_ARM64_D0  = 64,
  UNW_ARM64_D1  = 65,
  UNW_ARM64_D2  = 66,
  UNW_ARM64_D3  = 67,
  UNW_ARM64_D4  = 68,
  UNW_ARM64_D5  = 69,
  UNW_ARM64_D6  = 70,
  UNW_ARM64_D7  = 71,
  UNW_ARM64_D8  = 72,
  UNW_ARM64_D9  = 73,
  UNW_ARM64_D10 = 74,
  UNW_ARM64_D11 = 75,
  UNW_ARM64_D12 = 76,
  UNW_ARM64_D13 = 77,
  UNW_ARM64_D14 = 78,
  UNW_ARM64_D15 = 79,
  UNW_ARM64_D16 = 80,
  UNW_ARM64_D17 = 81,
  UNW_ARM64_D18 = 82,
  UNW_ARM64_D19 = 83,
  UNW_ARM64_D20 = 84,
  UNW_ARM64_D21 = 85,
  UNW_ARM64_D22 = 86,
  UNW_ARM64_D23 = 87,
  UNW_ARM64_D24 = 88,
  UNW_ARM64_D25 = 89,
  UNW_ARM64_D26 = 90,
  UNW_ARM64_D27 = 91,
  UNW_ARM64_D28 = 92,
  UNW_ARM64_D29 = 93,
  UNW_ARM64_D30 = 94,
  UNW_ARM64_D31 = 95,
};

// 32-bit ARM registers. Numbers match DWARF for ARM spec #3.1 Table 1.
// Naming scheme uses recommendations given in Note 4 for VFP-v2 and VFP-v3.
// In this scheme, even though the 64-bit floating point registers D0-D31
// overlap physically with the 32-bit floating pointer registers S0-S31,
// they are given a non-overlapping range of register numbers.
//
// Commented out ranges are not preserved during unwinding.
enum {
  UNW_ARM_R0  = 0,
  UNW_ARM_R1  = 1,
  UNW_ARM_R2  = 2,
  UNW_ARM_R3  = 3,
  UNW_ARM_R4  = 4,
  UNW_ARM_R5  = 5,
  UNW_ARM_R6  = 6,
  UNW_ARM_R7  = 7,
  UNW_ARM_R8  = 8,
  UNW_ARM_R9  = 9,
  UNW_ARM_R10 = 10,
  UNW_ARM_R11 = 11,
  UNW_ARM_R12 = 12,
  UNW_ARM_SP  = 13,  // Logical alias for UNW_REG_SP
  UNW_ARM_R13 = 13,
  UNW_ARM_LR  = 14,
  UNW_ARM_R14 = 14,
  UNW_ARM_IP  = 15,  // Logical alias for UNW_REG_IP
  UNW_ARM_R15 = 15,
  // 16-63 -- OBSOLETE. Used in VFP1 to represent both S0-S31 and D0-D31.
  UNW_ARM_S0  = 64,
  UNW_ARM_S1  = 65,
  UNW_ARM_S2  = 66,
  UNW_ARM_S3  = 67,
  UNW_ARM_S4  = 68,
  UNW_ARM_S5  = 69,
  UNW_ARM_S6  = 70,
  UNW_ARM_S7  = 71,
  UNW_ARM_S8  = 72,
  UNW_ARM_S9  = 73,
  UNW_ARM_S10 = 74,
  UNW_ARM_S11 = 75,
  UNW_ARM_S12 = 76,
  UNW_ARM_S13 = 77,
  UNW_ARM_S14 = 78,
  UNW_ARM_S15 = 79,
  UNW_ARM_S16 = 80,
  UNW_ARM_S17 = 81,
  UNW_ARM_S18 = 82,
  UNW_ARM_S19 = 83,
  UNW_ARM_S20 = 84,
  UNW_ARM_S21 = 85,
  UNW_ARM_S22 = 86,
  UNW_ARM_S23 = 87,
  UNW_ARM_S24 = 88,
  UNW_ARM_S25 = 89,
  UNW_ARM_S26 = 90,
  UNW_ARM_S27 = 91,
  UNW_ARM_S28 = 92,
  UNW_ARM_S29 = 93,
  UNW_ARM_S30 = 94,
  UNW_ARM_S31 = 95,
  //  96-103 -- OBSOLETE. F0-F7. Used by the FPA system. Superseded by VFP.
  // 104-111 -- wCGR0-wCGR7, ACC0-ACC7 (Intel wireless MMX)
  UNW_ARM_WR0 = 112,
  UNW_ARM_WR1 = 113,
  UNW_ARM_WR2 = 114,
  UNW_ARM_WR3 = 115,
  UNW_ARM_WR4 = 116,
  UNW_ARM_WR5 = 117,
  UNW_ARM_WR6 = 118,
  UNW_ARM_WR7 = 119,
  UNW_ARM_WR8 = 120,
  UNW_ARM_WR9 = 121,
  UNW_ARM_WR10 = 122,
  UNW_ARM_WR11 = 123,
  UNW_ARM_WR12 = 124,
  UNW_ARM_WR13 = 125,
  UNW_ARM_WR14 = 126,
  UNW_ARM_WR15 = 127,
  // 128-133 -- SPSR, SPSR_{FIQ|IRQ|ABT|UND|SVC}
  // 134-143 -- Reserved
  // 144-150 -- R8_USR-R14_USR
  // 151-157 -- R8_FIQ-R14_FIQ
  // 158-159 -- R13_IRQ-R14_IRQ
  // 160-161 -- R13_ABT-R14_ABT
  // 162-163 -- R13_UND-R14_UND
  // 164-165 -- R13_SVC-R14_SVC
  // 166-191 -- Reserved
  UNW_ARM_WC0 = 192,
  UNW_ARM_WC1 = 193,
  UNW_ARM_WC2 = 194,
  UNW_ARM_WC3 = 195,
  // 196-199 -- wC4-wC7 (Intel wireless MMX control)
  // 200-255 -- Reserved
  UNW_ARM_D0  = 256,
  UNW_ARM_D1  = 257,
  UNW_ARM_D2  = 258,
  UNW_ARM_D3  = 259,
  UNW_ARM_D4  = 260,
  UNW_ARM_D5  = 261,
  UNW_ARM_D6  = 262,
  UNW_ARM_D7  = 263,
  UNW_ARM_D8  = 264,
  UNW_ARM_D9  = 265,
  UNW_ARM_D10 = 266,
  UNW_ARM_D11 = 267,
  UNW_ARM_D12 = 268,
  UNW_ARM_D13 = 269,
  UNW_ARM_D14 = 270,
  UNW_ARM_D15 = 271,
  UNW_ARM_D16 = 272,
  UNW_ARM_D17 = 273,
  UNW_ARM_D18 = 274,
  UNW_ARM_D19 = 275,
  UNW_ARM_D20 = 276,
  UNW_ARM_D21 = 277,
  UNW_ARM_D22 = 278,
  UNW_ARM_D23 = 279,
  UNW_ARM_D24 = 280,
  UNW_ARM_D25 = 281,
  UNW_ARM_D26 = 282,
  UNW_ARM_D27 = 283,
  UNW_ARM_D28 = 284,
  UNW_ARM_D29 = 285,
  UNW_ARM_D30 = 286,
  UNW_ARM_D31 = 287,
  // 288-319 -- Reserved for VFP/Neon
  // 320-8191 -- Reserved
  // 8192-16383 -- Unspecified vendor co-processor register.
};

// OpenRISC1000 register numbers
enum {
  UNW_OR1K_R0  = 0,
  UNW_OR1K_R1  = 1,
  UNW_OR1K_R2  = 2,
  UNW_OR1K_R3  = 3,
  UNW_OR1K_R4  = 4,
  UNW_OR1K_R5  = 5,
  UNW_OR1K_R6  = 6,
  UNW_OR1K_R7  = 7,
  UNW_OR1K_R8  = 8,
  UNW_OR1K_R9  = 9,
  UNW_OR1K_R10 = 10,
  UNW_OR1K_R11 = 11,
  UNW_OR1K_R12 = 12,
  UNW_OR1K_R13 = 13,
  UNW_OR1K_R14 = 14,
  UNW_OR1K_R15 = 15,
  UNW_OR1K_R16 = 16,
  UNW_OR1K_R17 = 17,
  UNW_OR1K_R18 = 18,
  UNW_OR1K_R19 = 19,
  UNW_OR1K_R20 = 20,
  UNW_OR1K_R21 = 21,
  UNW_OR1K_R22 = 22,
  UNW_OR1K_R23 = 23,
  UNW_OR1K_R24 = 24,
  UNW_OR1K_R25 = 25,
  UNW_OR1K_R26 = 26,
  UNW_OR1K_R27 = 27,
  UNW_OR1K_R28 = 28,
  UNW_OR1K_R29 = 29,
  UNW_OR1K_R30 = 30,
  UNW_OR1K_R31 = 31,
  UNW_OR1K_EPCR = 32,
};

// MIPS registers
enum {
  UNW_MIPS_R0  = 0,
  UNW_MIPS_R1  = 1,
  UNW_MIPS_R2  = 2,
  UNW_MIPS_R3  = 3,
  UNW_MIPS_R4  = 4,
  UNW_MIPS_R5  = 5,
  UNW_MIPS_R6  = 6,
  UNW_MIPS_R7  = 7,
  UNW_MIPS_R8  = 8,
  UNW_MIPS_R9  = 9,
  UNW_MIPS_R10 = 10,
  UNW_MIPS_R11 = 11,
  UNW_MIPS_R12 = 12,
  UNW_MIPS_R13 = 13,
  UNW_MIPS_R14 = 14,
  UNW_MIPS_R15 = 15,
  UNW_MIPS_R16 = 16,
  UNW_MIPS_R17 = 17,
  UNW_MIPS_R18 = 18,
  UNW_MIPS_R19 = 19,
  UNW_MIPS_R20 = 20,
  UNW_MIPS_R21 = 21,
  UNW_MIPS_R22 = 22,
  UNW_MIPS_R23 = 23,
  UNW_MIPS_R24 = 24,
  UNW_MIPS_R25 = 25,
  UNW_MIPS_R26 = 26,
  UNW_MIPS_R27 = 27,
  UNW_MIPS_R28 = 28,
  UNW_MIPS_R29 = 29,
  UNW_MIPS_R30 = 30,
  UNW_MIPS_R31 = 31,
  UNW_MIPS_F0  = 32,
  UNW_MIPS_F1  = 33,
  UNW_MIPS_F2  = 34,
  UNW_MIPS_F3  = 35,
  UNW_MIPS_F4  = 36,
  UNW_MIPS_F5  = 37,
  UNW_MIPS_F6  = 38,
  UNW_MIPS_F7  = 39,
  UNW_MIPS_F8  = 40,
  UNW_MIPS_F9  = 41,
  UNW_MIPS_F10 = 42,
  UNW_MIPS_F11 = 43,
  UNW_MIPS_F12 = 44,
  UNW_MIPS_F13 = 45,
  UNW_MIPS_F14 = 46,
  UNW_MIPS_F15 = 47,
  UNW_MIPS_F16 = 48,
  UNW_MIPS_F17 = 49,
  UNW_MIPS_F18 = 50,
  UNW_MIPS_F19 = 51,
  UNW_MIPS_F20 = 52,
  UNW_MIPS_F21 = 53,
  UNW_MIPS_F22 = 54,
  UNW_MIPS_F23 = 55,
  UNW_MIPS_F24 = 56,
  UNW_MIPS_F25 = 57,
  UNW_MIPS_F26 = 58,
  UNW_MIPS_F27 = 59,
  UNW_MIPS_F28 = 60,
  UNW_MIPS_F29 = 61,
  UNW_MIPS_F30 = 62,
  UNW_MIPS_F31 = 63,
  UNW_MIPS_HI = 64,
  UNW_MIPS_LO = 65,
};

// SPARC registers
enum {
  UNW_SPARC_G0 = 0,
  UNW_SPARC_G1 = 1,
  UNW_SPARC_G2 = 2,
  UNW_SPARC_G3 = 3,
  UNW_SPARC_G4 = 4,
  UNW_SPARC_G5 = 5,
  UNW_SPARC_G6 = 6,
  UNW_SPARC_G7 = 7,
  UNW_SPARC_O0 = 8,
  UNW_SPARC_O1 = 9,
  UNW_SPARC_O2 = 10,
  UNW_SPARC_O3 = 11,
  UNW_SPARC_O4 = 12,
  UNW_SPARC_O5 = 13,
  UNW_SPARC_O6 = 14,
  UNW_SPARC_O7 = 15,
  UNW_SPARC_L0 = 16,
  UNW_SPARC_L1 = 17,
  UNW_SPARC_L2 = 18,
  UNW_SPARC_L3 = 19,
  UNW_SPARC_L4 = 20,
  UNW_SPARC_L5 = 21,
  UNW_SPARC_L6 = 22,
  UNW_SPARC_L7 = 23,
  UNW_SPARC_I0 = 24,
  UNW_SPARC_I1 = 25,
  UNW_SPARC_I2 = 26,
  UNW_SPARC_I3 = 27,
  UNW_SPARC_I4 = 28,
  UNW_SPARC_I5 = 29,
  UNW_SPARC_I6 = 30,
  UNW_SPARC_I7 = 31,
};

// RISC-V registers. These match the DWARF register numbers defined by section
// 4 of the RISC-V ELF psABI specification, which can be found at:
//
// https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md
enum {
  UNW_RISCV_X0  = 0,
  UNW_RISCV_X1  = 1,
  UNW_RISCV_X2  = 2,
  UNW_RISCV_X3  = 3,
  UNW_RISCV_X4  = 4,
  UNW_RISCV_X5  = 5,
  UNW_RISCV_X6  = 6,
  UNW_RISCV_X7  = 7,
  UNW_RISCV_X8  = 8,
  UNW_RISCV_X9  = 9,
  UNW_RISCV_X10 = 10,
  UNW_RISCV_X11 = 11,
  UNW_RISCV_X12 = 12,
  UNW_RISCV_X13 = 13,
  UNW_RISCV_X14 = 14,
  UNW_RISCV_X15 = 15,
  UNW_RISCV_X16 = 16,
  UNW_RISCV_X17 = 17,
  UNW_RISCV_X18 = 18,
  UNW_RISCV_X19 = 19,
  UNW_RISCV_X20 = 20,
  UNW_RISCV_X21 = 21,
  UNW_RISCV_X22 = 22,
  UNW_RISCV_X23 = 23,
  UNW_RISCV_X24 = 24,
  UNW_RISCV_X25 = 25,
  UNW_RISCV_X26 = 26,
  UNW_RISCV_X27 = 27,
  UNW_RISCV_X28 = 28,
  UNW_RISCV_X29 = 29,
  UNW_RISCV_X30 = 30,
  UNW_RISCV_X31 = 31,
  UNW_RISCV_F0  = 32,
  UNW_RISCV_F1  = 33,
  UNW_RISCV_F2  = 34,
  UNW_RISCV_F3  = 35,
  UNW_RISCV_F4  = 36,
  UNW_RISCV_F5  = 37,
  UNW_RISCV_F6  = 38,
  UNW_RISCV_F7  = 39,
  UNW_RISCV_F8  = 40,
  UNW_RISCV_F9  = 41,
  UNW_RISCV_F10 = 42,
  UNW_RISCV_F11 = 43,
  UNW_RISCV_F12 = 44,
  UNW_RISCV_F13 = 45,
  UNW_RISCV_F14 = 46,
  UNW_RISCV_F15 = 47,
  UNW_RISCV_F16 = 48,
  UNW_RISCV_F17 = 49,
  UNW_RISCV_F18 = 50,
  UNW_RISCV_F19 = 51,
  UNW_RISCV_F20 = 52,
  UNW_RISCV_F21 = 53,
  UNW_RISCV_F22 = 54,
  UNW_RISCV_F23 = 55,
  UNW_RISCV_F24 = 56,
  UNW_RISCV_F25 = 57,
  UNW_RISCV_F26 = 58,
  UNW_RISCV_F27 = 59,
  UNW_RISCV_F28 = 60,
  UNW_RISCV_F29 = 61,
  UNW_RISCV_F30 = 62,
  UNW_RISCV_F31 = 63,
};

#endif