1 //===-- DNBArchMachARM64.h --------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef __DNBArchImplARM64_h__
11 #define __DNBArchImplARM64_h__
13 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
15 #include <mach/thread_status.h>
18 #if defined(ARM_THREAD_STATE64_COUNT)
24 class DNBArchMachARM64 : public DNBArchProtocol {
26 enum { kMaxNumThumbITBreakpoints = 4 };
28 DNBArchMachARM64(MachThread *thread)
29 : m_thread(thread), m_state(), m_disabled_watchpoints(),
30 m_watchpoint_hw_index(-1), m_watchpoint_did_occur(false),
31 m_watchpoint_resume_single_step_enabled(false),
32 m_saved_register_states() {
33 m_disabled_watchpoints.resize(16);
34 memset(&m_dbg_save, 0, sizeof(m_dbg_save));
37 virtual ~DNBArchMachARM64() {}
39 static void Initialize();
40 static const DNBRegisterSetInfo *GetRegisterSetInfo(nub_size_t *num_reg_sets);
42 virtual bool GetRegisterValue(uint32_t set, uint32_t reg,
43 DNBRegisterValue *value);
44 virtual bool SetRegisterValue(uint32_t set, uint32_t reg,
45 const DNBRegisterValue *value);
46 virtual nub_size_t GetRegisterContext(void *buf, nub_size_t buf_len);
47 virtual nub_size_t SetRegisterContext(const void *buf, nub_size_t buf_len);
48 virtual uint32_t SaveRegisterState();
49 virtual bool RestoreRegisterState(uint32_t save_id);
51 virtual kern_return_t GetRegisterState(int set, bool force);
52 virtual kern_return_t SetRegisterState(int set);
53 virtual bool RegisterSetStateIsValid(int set) const;
55 virtual uint64_t GetPC(uint64_t failValue); // Get program counter
56 virtual kern_return_t SetPC(uint64_t value);
57 virtual uint64_t GetSP(uint64_t failValue); // Get stack pointer
58 virtual void ThreadWillResume();
59 virtual bool ThreadDidStop();
60 virtual bool NotifyException(MachException::Data &exc);
62 static DNBArchProtocol *Create(MachThread *thread);
63 static const uint8_t *SoftwareBreakpointOpcode(nub_size_t byte_size);
64 static uint32_t GetCPUType();
66 virtual uint32_t NumSupportedHardwareWatchpoints();
67 virtual uint32_t EnableHardwareWatchpoint(nub_addr_t addr, nub_size_t size,
68 bool read, bool write,
69 bool also_set_on_task);
70 virtual bool DisableHardwareWatchpoint(uint32_t hw_break_index,
71 bool also_set_on_task);
72 virtual bool DisableHardwareWatchpoint_helper(uint32_t hw_break_index,
73 bool also_set_on_task);
76 kern_return_t EnableHardwareSingleStep(bool enable);
77 static bool FixGenericRegisterNumber(uint32_t &set, uint32_t ®);
79 typedef enum RegisterSetTag {
80 e_regSetALL = REGISTER_SET_ALL,
81 e_regSetGPR, // ARM_THREAD_STATE64,
82 e_regSetVFP, // ARM_NEON_STATE64,
83 e_regSetEXC, // ARM_EXCEPTION_STATE64,
84 e_regSetDBG, // ARM_DEBUG_STATE64,
89 e_regSetGPRCount = ARM_THREAD_STATE64_COUNT,
90 e_regSetVFPCount = ARM_NEON_STATE64_COUNT,
91 e_regSetEXCCount = ARM_EXCEPTION_STATE64_COUNT,
92 e_regSetDBGCount = ARM_DEBUG_STATE64_COUNT,
95 enum { Read = 0, Write = 1, kNumErrors = 2 };
97 typedef arm_thread_state64_t GPR;
98 typedef arm_neon_state64_t FPU;
99 typedef arm_exception_state64_t EXC;
101 static const DNBRegisterInfo g_gpr_registers[];
102 static const DNBRegisterInfo g_vfp_registers[];
103 static const DNBRegisterInfo g_exc_registers[];
104 static const DNBRegisterSetInfo g_reg_sets[];
106 static const size_t k_num_gpr_registers;
107 static const size_t k_num_vfp_registers;
108 static const size_t k_num_exc_registers;
109 static const size_t k_num_all_registers;
110 static const size_t k_num_register_sets;
120 arm_debug_state64_t dbg;
121 kern_return_t gpr_errs[2]; // Read/Write errors
122 kern_return_t vfp_errs[2]; // Read/Write errors
123 kern_return_t exc_errs[2]; // Read/Write errors
124 kern_return_t dbg_errs[2]; // Read/Write errors
127 for (i = 0; i < kNumErrors; i++) {
134 void InvalidateRegisterSetState(int set) { SetError(set, Read, -1); }
136 void InvalidateAllRegisterStates() { SetError(e_regSetALL, Read, -1); }
138 kern_return_t GetError(int set, uint32_t err_idx) const {
139 if (err_idx < kNumErrors) {
141 // When getting all errors, just OR all values together to see if
142 // we got any kind of error.
144 return gpr_errs[err_idx] | vfp_errs[err_idx] | exc_errs[err_idx] |
147 return gpr_errs[err_idx];
149 return vfp_errs[err_idx];
151 return exc_errs[err_idx];
152 // case e_regSetDBG: return dbg_errs[err_idx];
159 bool SetError(int set, uint32_t err_idx, kern_return_t err) {
160 if (err_idx < kNumErrors) {
163 gpr_errs[err_idx] = err;
164 vfp_errs[err_idx] = err;
165 dbg_errs[err_idx] = err;
166 exc_errs[err_idx] = err;
170 gpr_errs[err_idx] = err;
174 vfp_errs[err_idx] = err;
178 exc_errs[err_idx] = err;
182 // dbg_errs[err_idx] = err;
190 bool RegsAreValid(int set) const {
191 return GetError(set, Read) == KERN_SUCCESS;
195 kern_return_t GetGPRState(bool force);
196 kern_return_t GetVFPState(bool force);
197 kern_return_t GetEXCState(bool force);
198 kern_return_t GetDBGState(bool force);
200 kern_return_t SetGPRState();
201 kern_return_t SetVFPState();
202 kern_return_t SetEXCState();
203 kern_return_t SetDBGState(bool also_set_on_task);
205 // Helper functions for watchpoint implementaions.
207 typedef arm_debug_state64_t DBG;
209 void ClearWatchpointOccurred();
210 bool HasWatchpointOccurred();
211 bool IsWatchpointEnabled(const DBG &debug_state, uint32_t hw_index);
212 nub_addr_t GetWatchpointAddressByIndex(uint32_t hw_index);
213 nub_addr_t GetWatchAddress(const DBG &debug_state, uint32_t hw_index);
214 virtual bool ReenableHardwareWatchpoint(uint32_t hw_break_index);
215 virtual bool ReenableHardwareWatchpoint_helper(uint32_t hw_break_index);
216 virtual uint32_t GetHardwareWatchpointHit(nub_addr_t &addr);
218 class disabled_watchpoint {
220 disabled_watchpoint() {
229 MachThread *m_thread;
231 arm_debug_state64_t m_dbg_save;
233 // arm64 doesn't keep the disabled watchpoint values in the debug register
234 // context like armv7;
235 // we need to save them aside when we disable them temporarily.
236 std::vector<disabled_watchpoint> m_disabled_watchpoints;
238 // The following member variables should be updated atomically.
239 int32_t m_watchpoint_hw_index;
240 bool m_watchpoint_did_occur;
241 bool m_watchpoint_resume_single_step_enabled;
243 typedef std::map<uint32_t, Context> SaveRegisterStates;
244 SaveRegisterStates m_saved_register_states;
247 #endif // #if defined (ARM_THREAD_STATE64_COUNT)
248 #endif // #if defined (__arm__)
249 #endif // #ifndef __DNBArchImplARM64_h__