//===----------------------------------------------------------------------===//
//
// 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

#if defined(_LIBUNWIND_TARGET_AARCH64_AUTHENTICATED_UNWINDING)

  #include <ptrauth.h>

  // `__ptrauth_restricted_intptr` is a feature of apple clang that predates
  // support for direct application of `__ptrauth` to integer types. This
  // guard is necessary to support compilation with those compiler.
  #if __has_extension(ptrauth_restricted_intptr_qualifier)
    #define __unwind_ptrauth_restricted_intptr(...) \
      __ptrauth_restricted_intptr(__VA_ARGS__)
  #else
    #define __unwind_ptrauth_restricted_intptr(...) \
      __ptrauth(__VA_ARGS__)
  #endif

  // ptrauth_string_discriminator("unw_proc_info_t::handler") == 0x7405
  #define __ptrauth_unwind_upi_handler_disc 0x7405

  #define __ptrauth_unwind_upi_handler \
    __ptrauth(ptrauth_key_function_pointer, 1, __ptrauth_unwind_upi_handler_disc)

  #define __ptrauth_unwind_upi_handler_intptr \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_function_pointer, 1,\
                                       __ptrauth_unwind_upi_handler_disc)

  // ptrauth_string_discriminator("unw_proc_info_t::start_ip") == 0xCA2C
  #define __ptrauth_unwind_upi_startip \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_independent_code, 1, 0xCA2C)

  // ptrauth_string_discriminator("unw_proc_info_t::end_ip") == 0xE183
  #define __ptrauth_unwind_upi_endip \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_independent_code, 1, 0xE183)

  // ptrauth_string_discriminator("unw_proc_info_t::lsda") == 0x83DE
  #define __ptrauth_unwind_upi_lsda \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x83DE)

  // ptrauth_string_discriminator("unw_proc_info_t::flags") == 0x79A1
  #define __ptrauth_unwind_upi_flags \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x79A1)

  // ptrauth_string_discriminator("unw_proc_info_t::unwind_info") == 0xC20C
  #define __ptrauth_unwind_upi_info \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0xC20C)

  // ptrauth_string_discriminator("unw_proc_info_t::extra") == 0x03DF
  #define __ptrauth_unwind_upi_extra \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x03DF)

  // ptrauth_string_discriminator("Registers_arm64::link_reg_t") == 0x8301
  #define __ptrauth_unwind_registers_arm64_link_reg \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_code, 1, 0x8301)

  // ptrauth_string_discriminator("UnwindInfoSections::dso_base") == 0x4FF5
  #define __ptrauth_unwind_uis_dso_base \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x4FF5)

  // ptrauth_string_discriminator("UnwindInfoSections::dwarf_section") == 0x4974
  #define __ptrauth_unwind_uis_dwarf_section \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x4974)

  // ptrauth_string_discriminator("UnwindInfoSections::dwarf_section_length") == 0x2A9A
  #define __ptrauth_unwind_uis_dwarf_section_length \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x2A9A)

  // ptrauth_string_discriminator("UnwindInfoSections::compact_unwind_section") == 0xA27B
  #define __ptrauth_unwind_uis_compact_unwind_section \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0xA27B)

  // ptrauth_string_discriminator("UnwindInfoSections::compact_unwind_section_length") == 0x5D0A
  #define __ptrauth_unwind_uis_compact_unwind_section_length \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_process_dependent_data, 1, 0x5D0A)

  // ptrauth_string_discriminator("CIE_Info::personality") == 0x6A40
  #define __ptrauth_unwind_cie_info_personality_disc 0x6A40
  #define __ptrauth_unwind_cie_info_personality \
    __unwind_ptrauth_restricted_intptr(ptrauth_key_function_pointer, 1, \
                                       __ptrauth_unwind_cie_info_personality_disc)

  // ptrauth_string_discriminator("personality") == 0x7EAD)
  #define __ptrauth_unwind_pauthtest_personality_disc 0x7EAD

#else

  #define __unwind_ptrauth_restricted_intptr(...)
  #define __ptrauth_unwind_upi_handler
  #define __ptrauth_unwind_upi_handler_intptr
  #define __ptrauth_unwind_upi_startip
  #define __ptrauth_unwind_upi_endip
  #define __ptrauth_unwind_upi_lsda
  #define __ptrauth_unwind_upi_flags
  #define __ptrauth_unwind_upi_info
  #define __ptrauth_unwind_upi_extra
  #define __ptrauth_unwind_registers_arm64_link_reg
  #define __ptrauth_unwind_uis_dso_base
  #define __ptrauth_unwind_uis_dwarf_section
  #define __ptrauth_unwind_uis_dwarf_section_length
  #define __ptrauth_unwind_uis_compact_unwind_section
  #define __ptrauth_unwind_uis_compact_unwind_section_length
  #define __ptrauth_unwind_cie_info_personality

#endif

#if defined(_WIN32) && defined(__SEH__)
  #define LIBUNWIND_CURSOR_ALIGNMENT_ATTR __attribute__((__aligned__(16)))
#else
  #define LIBUNWIND_CURSOR_ALIGNMENT_ATTR
#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];
} LIBUNWIND_CURSOR_ALIGNMENT_ATTR;
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__) && !defined(__SEH__)
typedef uint64_t unw_fpreg_t;
#else
typedef double unw_fpreg_t;
#endif

struct unw_proc_info_t {
  unw_word_t __ptrauth_unwind_upi_startip start_ip; /* start address of function */
  unw_word_t __ptrauth_unwind_upi_endip end_ip;     /* address after end of function */
  unw_word_t __ptrauth_unwind_upi_lsda lsda;        /* address of language specific data area, */
                                                    /* or zero if not used */

  unw_word_t __ptrauth_unwind_upi_handler_intptr handler;
  unw_word_t  gp;                                   /* not used */
  unw_word_t __ptrauth_unwind_upi_flags 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 __ptrauth_unwind_upi_info unwind_info; /* address of DWARF unwind info, or zero */
  unw_word_t __ptrauth_unwind_upi_extra 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

#ifdef _AIX
extern uintptr_t unw_get_data_rel_base(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 const char *unw_strerror(int) LIBUNWIND_AVAIL;

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_AARCH64_X0 = 0,
  UNW_AARCH64_X1 = 1,
  UNW_AARCH64_X2 = 2,
  UNW_AARCH64_X3 = 3,
  UNW_AARCH64_X4 = 4,
  UNW_AARCH64_X5 = 5,
  UNW_AARCH64_X6 = 6,
  UNW_AARCH64_X7 = 7,
  UNW_AARCH64_X8 = 8,
  UNW_AARCH64_X9 = 9,
  UNW_AARCH64_X10 = 10,
  UNW_AARCH64_X11 = 11,
  UNW_AARCH64_X12 = 12,
  UNW_AARCH64_X13 = 13,
  UNW_AARCH64_X14 = 14,
  UNW_AARCH64_X15 = 15,
  UNW_AARCH64_X16 = 16,
  UNW_AARCH64_X17 = 17,
  UNW_AARCH64_X18 = 18,
  UNW_AARCH64_X19 = 19,
  UNW_AARCH64_X20 = 20,
  UNW_AARCH64_X21 = 21,
  UNW_AARCH64_X22 = 22,
  UNW_AARCH64_X23 = 23,
  UNW_AARCH64_X24 = 24,
  UNW_AARCH64_X25 = 25,
  UNW_AARCH64_X26 = 26,
  UNW_AARCH64_X27 = 27,
  UNW_AARCH64_X28 = 28,
  UNW_AARCH64_X29 = 29,
  UNW_AARCH64_FP = 29,
  UNW_AARCH64_X30 = 30,
  UNW_AARCH64_LR = 30,
  UNW_AARCH64_X31 = 31,
  UNW_AARCH64_SP = 31,
  UNW_AARCH64_PC = 32,
  UNW_AARCH64_VG = 46,

  // reserved block
  UNW_AARCH64_RA_SIGN_STATE = 34,

  // FP/vector registers
  UNW_AARCH64_V0 = 64,
  UNW_AARCH64_V1 = 65,
  UNW_AARCH64_V2 = 66,
  UNW_AARCH64_V3 = 67,
  UNW_AARCH64_V4 = 68,
  UNW_AARCH64_V5 = 69,
  UNW_AARCH64_V6 = 70,
  UNW_AARCH64_V7 = 71,
  UNW_AARCH64_V8 = 72,
  UNW_AARCH64_V9 = 73,
  UNW_AARCH64_V10 = 74,
  UNW_AARCH64_V11 = 75,
  UNW_AARCH64_V12 = 76,
  UNW_AARCH64_V13 = 77,
  UNW_AARCH64_V14 = 78,
  UNW_AARCH64_V15 = 79,
  UNW_AARCH64_V16 = 80,
  UNW_AARCH64_V17 = 81,
  UNW_AARCH64_V18 = 82,
  UNW_AARCH64_V19 = 83,
  UNW_AARCH64_V20 = 84,
  UNW_AARCH64_V21 = 85,
  UNW_AARCH64_V22 = 86,
  UNW_AARCH64_V23 = 87,
  UNW_AARCH64_V24 = 88,
  UNW_AARCH64_V25 = 89,
  UNW_AARCH64_V26 = 90,
  UNW_AARCH64_V27 = 91,
  UNW_AARCH64_V28 = 92,
  UNW_AARCH64_V29 = 93,
  UNW_AARCH64_V30 = 94,
  UNW_AARCH64_V31 = 95,

  // Compatibility aliases
  UNW_ARM64_X0 = UNW_AARCH64_X0,
  UNW_ARM64_X1 = UNW_AARCH64_X1,
  UNW_ARM64_X2 = UNW_AARCH64_X2,
  UNW_ARM64_X3 = UNW_AARCH64_X3,
  UNW_ARM64_X4 = UNW_AARCH64_X4,
  UNW_ARM64_X5 = UNW_AARCH64_X5,
  UNW_ARM64_X6 = UNW_AARCH64_X6,
  UNW_ARM64_X7 = UNW_AARCH64_X7,
  UNW_ARM64_X8 = UNW_AARCH64_X8,
  UNW_ARM64_X9 = UNW_AARCH64_X9,
  UNW_ARM64_X10 = UNW_AARCH64_X10,
  UNW_ARM64_X11 = UNW_AARCH64_X11,
  UNW_ARM64_X12 = UNW_AARCH64_X12,
  UNW_ARM64_X13 = UNW_AARCH64_X13,
  UNW_ARM64_X14 = UNW_AARCH64_X14,
  UNW_ARM64_X15 = UNW_AARCH64_X15,
  UNW_ARM64_X16 = UNW_AARCH64_X16,
  UNW_ARM64_X17 = UNW_AARCH64_X17,
  UNW_ARM64_X18 = UNW_AARCH64_X18,
  UNW_ARM64_X19 = UNW_AARCH64_X19,
  UNW_ARM64_X20 = UNW_AARCH64_X20,
  UNW_ARM64_X21 = UNW_AARCH64_X21,
  UNW_ARM64_X22 = UNW_AARCH64_X22,
  UNW_ARM64_X23 = UNW_AARCH64_X23,
  UNW_ARM64_X24 = UNW_AARCH64_X24,
  UNW_ARM64_X25 = UNW_AARCH64_X25,
  UNW_ARM64_X26 = UNW_AARCH64_X26,
  UNW_ARM64_X27 = UNW_AARCH64_X27,
  UNW_ARM64_X28 = UNW_AARCH64_X28,
  UNW_ARM64_X29 = UNW_AARCH64_X29,
  UNW_ARM64_FP = UNW_AARCH64_FP,
  UNW_ARM64_X30 = UNW_AARCH64_X30,
  UNW_ARM64_LR = UNW_AARCH64_LR,
  UNW_ARM64_X31 = UNW_AARCH64_X31,
  UNW_ARM64_SP = UNW_AARCH64_SP,
  UNW_ARM64_PC = UNW_AARCH64_PC,
  UNW_ARM64_RA_SIGN_STATE = UNW_AARCH64_RA_SIGN_STATE,
  UNW_ARM64_D0 = UNW_AARCH64_V0,
  UNW_ARM64_D1 = UNW_AARCH64_V1,
  UNW_ARM64_D2 = UNW_AARCH64_V2,
  UNW_ARM64_D3 = UNW_AARCH64_V3,
  UNW_ARM64_D4 = UNW_AARCH64_V4,
  UNW_ARM64_D5 = UNW_AARCH64_V5,
  UNW_ARM64_D6 = UNW_AARCH64_V6,
  UNW_ARM64_D7 = UNW_AARCH64_V7,
  UNW_ARM64_D8 = UNW_AARCH64_V8,
  UNW_ARM64_D9 = UNW_AARCH64_V9,
  UNW_ARM64_D10 = UNW_AARCH64_V10,
  UNW_ARM64_D11 = UNW_AARCH64_V11,
  UNW_ARM64_D12 = UNW_AARCH64_V12,
  UNW_ARM64_D13 = UNW_AARCH64_V13,
  UNW_ARM64_D14 = UNW_AARCH64_V14,
  UNW_ARM64_D15 = UNW_AARCH64_V15,
  UNW_ARM64_D16 = UNW_AARCH64_V16,
  UNW_ARM64_D17 = UNW_AARCH64_V17,
  UNW_ARM64_D18 = UNW_AARCH64_V18,
  UNW_ARM64_D19 = UNW_AARCH64_V19,
  UNW_ARM64_D20 = UNW_AARCH64_V20,
  UNW_ARM64_D21 = UNW_AARCH64_V21,
  UNW_ARM64_D22 = UNW_AARCH64_V22,
  UNW_ARM64_D23 = UNW_AARCH64_V23,
  UNW_ARM64_D24 = UNW_AARCH64_V24,
  UNW_ARM64_D25 = UNW_AARCH64_V25,
  UNW_ARM64_D26 = UNW_AARCH64_V26,
  UNW_ARM64_D27 = UNW_AARCH64_V27,
  UNW_ARM64_D28 = UNW_AARCH64_V28,
  UNW_ARM64_D29 = UNW_AARCH64_V29,
  UNW_ARM64_D30 = UNW_AARCH64_V30,
  UNW_ARM64_D31 = UNW_AARCH64_V31,
};

// 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}
  // 134-142 -- Reserved
  UNW_ARM_RA_AUTH_CODE = 143,
  // 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,
  // HI,LO have been dropped since r6, we keep them here.
  // So, when we add DSP/MSA etc, we can use the same register indexes
  // for r6 and pre-r6.
  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,
};

// Hexagon register numbers
enum {
  UNW_HEXAGON_R0,
  UNW_HEXAGON_R1,
  UNW_HEXAGON_R2,
  UNW_HEXAGON_R3,
  UNW_HEXAGON_R4,
  UNW_HEXAGON_R5,
  UNW_HEXAGON_R6,
  UNW_HEXAGON_R7,
  UNW_HEXAGON_R8,
  UNW_HEXAGON_R9,
  UNW_HEXAGON_R10,
  UNW_HEXAGON_R11,
  UNW_HEXAGON_R12,
  UNW_HEXAGON_R13,
  UNW_HEXAGON_R14,
  UNW_HEXAGON_R15,
  UNW_HEXAGON_R16,
  UNW_HEXAGON_R17,
  UNW_HEXAGON_R18,
  UNW_HEXAGON_R19,
  UNW_HEXAGON_R20,
  UNW_HEXAGON_R21,
  UNW_HEXAGON_R22,
  UNW_HEXAGON_R23,
  UNW_HEXAGON_R24,
  UNW_HEXAGON_R25,
  UNW_HEXAGON_R26,
  UNW_HEXAGON_R27,
  UNW_HEXAGON_R28,
  UNW_HEXAGON_R29,
  UNW_HEXAGON_R30,
  UNW_HEXAGON_R31,
  UNW_HEXAGON_P3_0,
  UNW_HEXAGON_PC,
};

// 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,
  // 65-95 -- Reserved for future standard extensions
  // 96-127 -- v0-v31 (Vector registers)
  // 128-3071 -- Reserved for future standard extensions
  // 3072-4095 -- Reserved for custom extensions
  // 4096-8191 -- CSRs
  //
  // VLENB CSR number: 0xC22 -- defined by section 3 of v-spec:
  // https://github.com/riscv/riscv-v-spec/blob/master/v-spec.adoc#3-vector-extension-programmers-model
  // VLENB DWARF number: 0x1000 + 0xC22
  UNW_RISCV_VLENB = 0x1C22,
};

// VE register numbers
enum {
  UNW_VE_S0   = 0,
  UNW_VE_S1   = 1,
  UNW_VE_S2   = 2,
  UNW_VE_S3   = 3,
  UNW_VE_S4   = 4,
  UNW_VE_S5   = 5,
  UNW_VE_S6   = 6,
  UNW_VE_S7   = 7,
  UNW_VE_S8   = 8,
  UNW_VE_S9   = 9,
  UNW_VE_S10  = 10,
  UNW_VE_S11  = 11,
  UNW_VE_S12  = 12,
  UNW_VE_S13  = 13,
  UNW_VE_S14  = 14,
  UNW_VE_S15  = 15,
  UNW_VE_S16  = 16,
  UNW_VE_S17  = 17,
  UNW_VE_S18  = 18,
  UNW_VE_S19  = 19,
  UNW_VE_S20  = 20,
  UNW_VE_S21  = 21,
  UNW_VE_S22  = 22,
  UNW_VE_S23  = 23,
  UNW_VE_S24  = 24,
  UNW_VE_S25  = 25,
  UNW_VE_S26  = 26,
  UNW_VE_S27  = 27,
  UNW_VE_S28  = 28,
  UNW_VE_S29  = 29,
  UNW_VE_S30  = 30,
  UNW_VE_S31  = 31,
  UNW_VE_S32  = 32,
  UNW_VE_S33  = 33,
  UNW_VE_S34  = 34,
  UNW_VE_S35  = 35,
  UNW_VE_S36  = 36,
  UNW_VE_S37  = 37,
  UNW_VE_S38  = 38,
  UNW_VE_S39  = 39,
  UNW_VE_S40  = 40,
  UNW_VE_S41  = 41,
  UNW_VE_S42  = 42,
  UNW_VE_S43  = 43,
  UNW_VE_S44  = 44,
  UNW_VE_S45  = 45,
  UNW_VE_S46  = 46,
  UNW_VE_S47  = 47,
  UNW_VE_S48  = 48,
  UNW_VE_S49  = 49,
  UNW_VE_S50  = 50,
  UNW_VE_S51  = 51,
  UNW_VE_S52  = 52,
  UNW_VE_S53  = 53,
  UNW_VE_S54  = 54,
  UNW_VE_S55  = 55,
  UNW_VE_S56  = 56,
  UNW_VE_S57  = 57,
  UNW_VE_S58  = 58,
  UNW_VE_S59  = 59,
  UNW_VE_S60  = 60,
  UNW_VE_S61  = 61,
  UNW_VE_S62  = 62,
  UNW_VE_S63  = 63,
  UNW_VE_V0   = 64 + 0,
  UNW_VE_V1   = 64 + 1,
  UNW_VE_V2   = 64 + 2,
  UNW_VE_V3   = 64 + 3,
  UNW_VE_V4   = 64 + 4,
  UNW_VE_V5   = 64 + 5,
  UNW_VE_V6   = 64 + 6,
  UNW_VE_V7   = 64 + 7,
  UNW_VE_V8   = 64 + 8,
  UNW_VE_V9   = 64 + 9,
  UNW_VE_V10  = 64 + 10,
  UNW_VE_V11  = 64 + 11,
  UNW_VE_V12  = 64 + 12,
  UNW_VE_V13  = 64 + 13,
  UNW_VE_V14  = 64 + 14,
  UNW_VE_V15  = 64 + 15,
  UNW_VE_V16  = 64 + 16,
  UNW_VE_V17  = 64 + 17,
  UNW_VE_V18  = 64 + 18,
  UNW_VE_V19  = 64 + 19,
  UNW_VE_V20  = 64 + 20,
  UNW_VE_V21  = 64 + 21,
  UNW_VE_V22  = 64 + 22,
  UNW_VE_V23  = 64 + 23,
  UNW_VE_V24  = 64 + 24,
  UNW_VE_V25  = 64 + 25,
  UNW_VE_V26  = 64 + 26,
  UNW_VE_V27  = 64 + 27,
  UNW_VE_V28  = 64 + 28,
  UNW_VE_V29  = 64 + 29,
  UNW_VE_V30  = 64 + 30,
  UNW_VE_V31  = 64 + 31,
  UNW_VE_V32  = 64 + 32,
  UNW_VE_V33  = 64 + 33,
  UNW_VE_V34  = 64 + 34,
  UNW_VE_V35  = 64 + 35,
  UNW_VE_V36  = 64 + 36,
  UNW_VE_V37  = 64 + 37,
  UNW_VE_V38  = 64 + 38,
  UNW_VE_V39  = 64 + 39,
  UNW_VE_V40  = 64 + 40,
  UNW_VE_V41  = 64 + 41,
  UNW_VE_V42  = 64 + 42,
  UNW_VE_V43  = 64 + 43,
  UNW_VE_V44  = 64 + 44,
  UNW_VE_V45  = 64 + 45,
  UNW_VE_V46  = 64 + 46,
  UNW_VE_V47  = 64 + 47,
  UNW_VE_V48  = 64 + 48,
  UNW_VE_V49  = 64 + 49,
  UNW_VE_V50  = 64 + 50,
  UNW_VE_V51  = 64 + 51,
  UNW_VE_V52  = 64 + 52,
  UNW_VE_V53  = 64 + 53,
  UNW_VE_V54  = 64 + 54,
  UNW_VE_V55  = 64 + 55,
  UNW_VE_V56  = 64 + 56,
  UNW_VE_V57  = 64 + 57,
  UNW_VE_V58  = 64 + 58,
  UNW_VE_V59  = 64 + 59,
  UNW_VE_V60  = 64 + 60,
  UNW_VE_V61  = 64 + 61,
  UNW_VE_V62  = 64 + 62,
  UNW_VE_V63  = 64 + 63,
  UNW_VE_VM0  = 128 + 0,
  UNW_VE_VM1  = 128 + 1,
  UNW_VE_VM2  = 128 + 2,
  UNW_VE_VM3  = 128 + 3,
  UNW_VE_VM4  = 128 + 4,
  UNW_VE_VM5  = 128 + 5,
  UNW_VE_VM6  = 128 + 6,
  UNW_VE_VM7  = 128 + 7,
  UNW_VE_VM8  = 128 + 8,
  UNW_VE_VM9  = 128 + 9,
  UNW_VE_VM10 = 128 + 10,
  UNW_VE_VM11 = 128 + 11,
  UNW_VE_VM12 = 128 + 12,
  UNW_VE_VM13 = 128 + 13,
  UNW_VE_VM14 = 128 + 14,
  UNW_VE_VM15 = 128 + 15, // = 143

  // Following registers don't have DWARF register numbers.
  UNW_VE_VIXR = 144,
  UNW_VE_VL   = 145,
};

// s390x register numbers
enum {
  UNW_S390X_R0      = 0,
  UNW_S390X_R1      = 1,
  UNW_S390X_R2      = 2,
  UNW_S390X_R3      = 3,
  UNW_S390X_R4      = 4,
  UNW_S390X_R5      = 5,
  UNW_S390X_R6      = 6,
  UNW_S390X_R7      = 7,
  UNW_S390X_R8      = 8,
  UNW_S390X_R9      = 9,
  UNW_S390X_R10     = 10,
  UNW_S390X_R11     = 11,
  UNW_S390X_R12     = 12,
  UNW_S390X_R13     = 13,
  UNW_S390X_R14     = 14,
  UNW_S390X_R15     = 15,
  UNW_S390X_F0      = 16,
  UNW_S390X_F2      = 17,
  UNW_S390X_F4      = 18,
  UNW_S390X_F6      = 19,
  UNW_S390X_F1      = 20,
  UNW_S390X_F3      = 21,
  UNW_S390X_F5      = 22,
  UNW_S390X_F7      = 23,
  UNW_S390X_F8      = 24,
  UNW_S390X_F10     = 25,
  UNW_S390X_F12     = 26,
  UNW_S390X_F14     = 27,
  UNW_S390X_F9      = 28,
  UNW_S390X_F11     = 29,
  UNW_S390X_F13     = 30,
  UNW_S390X_F15     = 31,
  // 32-47 Control Registers
  // 48-63 Access Registers
  UNW_S390X_PSWM    = 64,
  UNW_S390X_PSWA    = 65,
  // 66-67 Reserved
  // 68-83 Vector Registers %v16-%v31
};

// LoongArch registers.
enum {
  UNW_LOONGARCH_R0 = 0,
  UNW_LOONGARCH_R1 = 1,
  UNW_LOONGARCH_R2 = 2,
  UNW_LOONGARCH_R3 = 3,
  UNW_LOONGARCH_R4 = 4,
  UNW_LOONGARCH_R5 = 5,
  UNW_LOONGARCH_R6 = 6,
  UNW_LOONGARCH_R7 = 7,
  UNW_LOONGARCH_R8 = 8,
  UNW_LOONGARCH_R9 = 9,
  UNW_LOONGARCH_R10 = 10,
  UNW_LOONGARCH_R11 = 11,
  UNW_LOONGARCH_R12 = 12,
  UNW_LOONGARCH_R13 = 13,
  UNW_LOONGARCH_R14 = 14,
  UNW_LOONGARCH_R15 = 15,
  UNW_LOONGARCH_R16 = 16,
  UNW_LOONGARCH_R17 = 17,
  UNW_LOONGARCH_R18 = 18,
  UNW_LOONGARCH_R19 = 19,
  UNW_LOONGARCH_R20 = 20,
  UNW_LOONGARCH_R21 = 21,
  UNW_LOONGARCH_R22 = 22,
  UNW_LOONGARCH_R23 = 23,
  UNW_LOONGARCH_R24 = 24,
  UNW_LOONGARCH_R25 = 25,
  UNW_LOONGARCH_R26 = 26,
  UNW_LOONGARCH_R27 = 27,
  UNW_LOONGARCH_R28 = 28,
  UNW_LOONGARCH_R29 = 29,
  UNW_LOONGARCH_R30 = 30,
  UNW_LOONGARCH_R31 = 31,
  UNW_LOONGARCH_F0 = 32,
  UNW_LOONGARCH_F1 = 33,
  UNW_LOONGARCH_F2 = 34,
  UNW_LOONGARCH_F3 = 35,
  UNW_LOONGARCH_F4 = 36,
  UNW_LOONGARCH_F5 = 37,
  UNW_LOONGARCH_F6 = 38,
  UNW_LOONGARCH_F7 = 39,
  UNW_LOONGARCH_F8 = 40,
  UNW_LOONGARCH_F9 = 41,
  UNW_LOONGARCH_F10 = 42,
  UNW_LOONGARCH_F11 = 43,
  UNW_LOONGARCH_F12 = 44,
  UNW_LOONGARCH_F13 = 45,
  UNW_LOONGARCH_F14 = 46,
  UNW_LOONGARCH_F15 = 47,
  UNW_LOONGARCH_F16 = 48,
  UNW_LOONGARCH_F17 = 49,
  UNW_LOONGARCH_F18 = 50,
  UNW_LOONGARCH_F19 = 51,
  UNW_LOONGARCH_F20 = 52,
  UNW_LOONGARCH_F21 = 53,
  UNW_LOONGARCH_F22 = 54,
  UNW_LOONGARCH_F23 = 55,
  UNW_LOONGARCH_F24 = 56,
  UNW_LOONGARCH_F25 = 57,
  UNW_LOONGARCH_F26 = 58,
  UNW_LOONGARCH_F27 = 59,
  UNW_LOONGARCH_F28 = 60,
  UNW_LOONGARCH_F29 = 61,
  UNW_LOONGARCH_F30 = 62,
  UNW_LOONGARCH_F31 = 63,
};

#endif
