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diff --git a/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h b/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h
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+//===-- RegisterContextDarwin_arm64.h -----------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RegisterContextDarwin_arm64_h_
+#define liblldb_RegisterContextDarwin_arm64_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Target/RegisterContext.h"
+
+// Break only in privileged or user mode
+#define S_RSVD ((uint32_t)(0u << 1))
+#define S_PRIV ((uint32_t)(1u << 1))
+#define S_USER ((uint32_t)(2u << 1))
+#define S_PRIV_USER ((S_PRIV) | (S_USER))
+
+#define WCR_ENABLE ((uint32_t)(1u))
+
+// Watchpoint load/store
+#define WCR_LOAD ((uint32_t)(1u << 3))
+#define WCR_STORE ((uint32_t)(1u << 4))
+
+class RegisterContextDarwin_arm64 : public lldb_private::RegisterContext
+{
+public:
+
+ RegisterContextDarwin_arm64(lldb_private::Thread &thread, uint32_t concrete_frame_idx);
+
+ virtual
+ ~RegisterContextDarwin_arm64();
+
+ virtual void
+ InvalidateAllRegisters ();
+
+ virtual size_t
+ GetRegisterCount ();
+
+ virtual const lldb_private::RegisterInfo *
+ GetRegisterInfoAtIndex (size_t reg);
+
+ virtual size_t
+ GetRegisterSetCount ();
+
+ virtual const lldb_private::RegisterSet *
+ GetRegisterSet (size_t set);
+
+ virtual bool
+ ReadRegister (const lldb_private::RegisterInfo *reg_info,
+ lldb_private::RegisterValue &reg_value);
+
+ virtual bool
+ WriteRegister (const lldb_private::RegisterInfo *reg_info,
+ const lldb_private::RegisterValue &reg_value);
+
+ virtual bool
+ ReadAllRegisterValues (lldb::DataBufferSP &data_sp);
+
+ virtual bool
+ WriteAllRegisterValues (const lldb::DataBufferSP &data_sp);
+
+ virtual uint32_t
+ ConvertRegisterKindToRegisterNumber (lldb::RegisterKind kind, uint32_t num);
+
+ virtual uint32_t
+ NumSupportedHardwareWatchpoints ();
+
+ virtual uint32_t
+ SetHardwareWatchpoint (lldb::addr_t addr, size_t size, bool read, bool write);
+
+ virtual bool
+ ClearHardwareWatchpoint (uint32_t hw_index);
+
+ // mirrors <mach/arm/thread_status.h> arm_thread_state64_t
+ struct GPR
+ {
+ uint64_t x[29]; // x0-x28
+ uint64_t fp; // x29
+ uint64_t lr; // x30
+ uint64_t sp; // x31
+ uint64_t pc; // pc
+ uint32_t cpsr; // cpsr
+ };
+
+
+ struct VReg
+ {
+ uint8_t bytes[16];
+ };
+
+ // mirrors <mach/arm/thread_status.h> arm_neon_state64_t
+ struct FPU
+ {
+ VReg v[32];
+ uint32_t fpsr;
+ uint32_t fpcr;
+ };
+
+ // mirrors <mach/arm/thread_status.h> arm_exception_state64_t
+ struct EXC
+ {
+ uint64_t far; // Virtual Fault Address
+ uint32_t esr; // Exception syndrome
+ uint32_t exception; // number of arm exception token
+ };
+
+ // mirrors <mach/arm/thread_status.h> arm_debug_state64_t
+ struct DBG
+ {
+ uint64_t bvr[16];
+ uint64_t bcr[16];
+ uint64_t wvr[16];
+ uint64_t wcr[16];
+ uint64_t mdscr_el1;
+ };
+
+ static void
+ LogDBGRegisters (lldb_private::Log *log, const DBG& dbg);
+
+protected:
+
+ enum
+ {
+ GPRRegSet = 6, // ARM_THREAD_STATE64
+ FPURegSet = 17, // ARM_NEON_STATE64
+ EXCRegSet = 7, // ARM_EXCEPTION_STATE64
+ DBGRegSet = 15 // ARM_DEBUG_STATE64
+ };
+
+ enum
+ {
+ GPRWordCount = sizeof(GPR)/sizeof(uint32_t), // ARM_THREAD_STATE64_COUNT
+ FPUWordCount = sizeof(FPU)/sizeof(uint32_t), // ARM_NEON_STATE64_COUNT
+ EXCWordCount = sizeof(EXC)/sizeof(uint32_t), // ARM_EXCEPTION_STATE64_COUNT
+ DBGWordCount = sizeof(DBG)/sizeof(uint32_t) // ARM_DEBUG_STATE64_COUNT
+ };
+
+ enum
+ {
+ Read = 0,
+ Write = 1,
+ kNumErrors = 2
+ };
+
+ GPR gpr;
+ FPU fpu;
+ EXC exc;
+ DBG dbg;
+ int gpr_errs[2]; // Read/Write errors
+ int fpu_errs[2]; // Read/Write errors
+ int exc_errs[2]; // Read/Write errors
+ int dbg_errs[2]; // Read/Write errors
+
+ void
+ InvalidateAllRegisterStates()
+ {
+ SetError (GPRRegSet, Read, -1);
+ SetError (FPURegSet, Read, -1);
+ SetError (EXCRegSet, Read, -1);
+ }
+
+ int
+ GetError (int flavor, uint32_t err_idx) const
+ {
+ if (err_idx < kNumErrors)
+ {
+ switch (flavor)
+ {
+ // When getting all errors, just OR all values together to see if
+ // we got any kind of error.
+ case GPRRegSet: return gpr_errs[err_idx];
+ case FPURegSet: return fpu_errs[err_idx];
+ case EXCRegSet: return exc_errs[err_idx];
+ case DBGRegSet: return dbg_errs[err_idx];
+ default: break;
+ }
+ }
+ return -1;
+ }
+
+ bool
+ SetError (int flavor, uint32_t err_idx, int err)
+ {
+ if (err_idx < kNumErrors)
+ {
+ switch (flavor)
+ {
+ case GPRRegSet:
+ gpr_errs[err_idx] = err;
+ return true;
+
+ case FPURegSet:
+ fpu_errs[err_idx] = err;
+ return true;
+
+ case EXCRegSet:
+ exc_errs[err_idx] = err;
+ return true;
+
+ case DBGRegSet:
+ exc_errs[err_idx] = err;
+ return true;
+
+ default: break;
+ }
+ }
+ return false;
+ }
+
+ bool
+ RegisterSetIsCached (int set) const
+ {
+ return GetError(set, Read) == 0;
+ }
+
+ int
+ ReadGPR (bool force);
+
+ int
+ ReadFPU (bool force);
+
+ int
+ ReadEXC (bool force);
+
+ int
+ ReadDBG (bool force);
+
+ int
+ WriteGPR ();
+
+ int
+ WriteFPU ();
+
+ int
+ WriteEXC ();
+
+ int
+ WriteDBG ();
+
+
+ // Subclasses override these to do the actual reading.
+ virtual int
+ DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr)
+ {
+ return -1;
+ }
+
+ virtual int
+ DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) = 0;
+
+ virtual int
+ DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) = 0;
+
+ virtual int
+ DoReadDBG (lldb::tid_t tid, int flavor, DBG &dbg) = 0;
+
+ virtual int
+ DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) = 0;
+
+ virtual int
+ DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) = 0;
+
+ virtual int
+ DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) = 0;
+
+ virtual int
+ DoWriteDBG (lldb::tid_t tid, int flavor, const DBG &dbg) = 0;
+
+ int
+ ReadRegisterSet (uint32_t set, bool force);
+
+ int
+ WriteRegisterSet (uint32_t set);
+
+ static uint32_t
+ GetRegisterNumber (uint32_t reg_kind, uint32_t reg_num);
+
+ static int
+ GetSetForNativeRegNum (int reg_num);
+
+ static size_t
+ GetRegisterInfosCount ();
+
+ static const lldb_private::RegisterInfo *
+ GetRegisterInfos ();
+};
+
+#endif // liblldb_RegisterContextDarwin_arm64_h_