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RegisterContextDarwin_arm.h
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1 //===-- RegisterContextDarwin_arm.h -----------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef liblldb_RegisterContextDarwin_arm_h_
10 #define liblldb_RegisterContextDarwin_arm_h_
11 
13 #include "lldb/lldb-private.h"
14 
15 // BCR address match type
16 #define BCR_M_IMVA_MATCH ((uint32_t)(0u << 21))
17 #define BCR_M_CONTEXT_ID_MATCH ((uint32_t)(1u << 21))
18 #define BCR_M_IMVA_MISMATCH ((uint32_t)(2u << 21))
19 #define BCR_M_RESERVED ((uint32_t)(3u << 21))
20 
21 // Link a BVR/BCR or WVR/WCR pair to another
22 #define E_ENABLE_LINKING ((uint32_t)(1u << 20))
23 
24 // Byte Address Select
25 #define BAS_IMVA_PLUS_0 ((uint32_t)(1u << 5))
26 #define BAS_IMVA_PLUS_1 ((uint32_t)(1u << 6))
27 #define BAS_IMVA_PLUS_2 ((uint32_t)(1u << 7))
28 #define BAS_IMVA_PLUS_3 ((uint32_t)(1u << 8))
29 #define BAS_IMVA_0_1 ((uint32_t)(3u << 5))
30 #define BAS_IMVA_2_3 ((uint32_t)(3u << 7))
31 #define BAS_IMVA_ALL ((uint32_t)(0xfu << 5))
32 
33 // Break only in privileged or user mode
34 #define S_RSVD ((uint32_t)(0u << 1))
35 #define S_PRIV ((uint32_t)(1u << 1))
36 #define S_USER ((uint32_t)(2u << 1))
37 #define S_PRIV_USER ((S_PRIV) | (S_USER))
38 
39 #define BCR_ENABLE ((uint32_t)(1u))
40 #define WCR_ENABLE ((uint32_t)(1u))
41 
42 // Watchpoint load/store
43 #define WCR_LOAD ((uint32_t)(1u << 3))
44 #define WCR_STORE ((uint32_t)(1u << 4))
45 
47 public:
49  uint32_t concrete_frame_idx);
50 
51  ~RegisterContextDarwin_arm() override;
52 
53  void InvalidateAllRegisters() override;
54 
55  size_t GetRegisterCount() override;
56 
57  const lldb_private::RegisterInfo *GetRegisterInfoAtIndex(size_t reg) override;
58 
59  size_t GetRegisterSetCount() override;
60 
61  const lldb_private::RegisterSet *GetRegisterSet(size_t set) override;
62 
63  bool ReadRegister(const lldb_private::RegisterInfo *reg_info,
64  lldb_private::RegisterValue &reg_value) override;
65 
66  bool WriteRegister(const lldb_private::RegisterInfo *reg_info,
67  const lldb_private::RegisterValue &reg_value) override;
68 
69  bool ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override;
70 
71  bool WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
72 
74  uint32_t num) override;
75 
77 
78  uint32_t SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
79 
80  bool ClearHardwareBreakpoint(uint32_t hw_idx) override;
81 
83 
84  uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read,
85  bool write) override;
86 
87  bool ClearHardwareWatchpoint(uint32_t hw_index) override;
88 
89  struct GPR {
90  uint32_t r[16]; // R0-R15
91  uint32_t cpsr; // CPSR
92  };
93 
94  struct QReg {
95  uint8_t bytes[16];
96  };
97 
98  struct FPU {
99  union {
100  uint32_t s[32];
101  uint64_t d[32];
102  QReg q[16]; // the 128-bit NEON registers
103  } floats;
105  };
106 
107  // struct NeonReg
108  // {
109  // uint8_t bytes[16];
110  // };
111  //
112  // struct VFPv3
113  // {
114  // union {
115  // uint32_t s[32];
116  // uint64_t d[32];
117  // NeonReg q[16];
118  // } v3;
119  // uint32_t fpscr;
120  // };
121 
122  struct EXC {
124  uint32_t fsr; /* Fault status */
125  uint32_t far; /* Virtual Fault Address */
126  };
127 
128  struct DBG {
129  uint32_t bvr[16];
130  uint32_t bcr[16];
131  uint32_t wvr[16];
132  uint32_t wcr[16];
133  };
134 
135  static void LogDBGRegisters(lldb_private::Log *log, const DBG &dbg);
136 
137 protected:
138  enum {
139  GPRRegSet = 1, // ARM_THREAD_STATE
140  GPRAltRegSet = 9, // ARM_THREAD_STATE32
141  FPURegSet = 2, // ARM_VFP_STATE
142  EXCRegSet = 3, // ARM_EXCEPTION_STATE
143  DBGRegSet = 4 // ARM_DEBUG_STATE
144  };
145 
146  enum {
147  GPRWordCount = sizeof(GPR) / sizeof(uint32_t),
148  FPUWordCount = sizeof(FPU) / sizeof(uint32_t),
149  EXCWordCount = sizeof(EXC) / sizeof(uint32_t),
150  DBGWordCount = sizeof(DBG) / sizeof(uint32_t)
151  };
152 
153  enum { Read = 0, Write = 1, kNumErrors = 2 };
154 
159  int gpr_errs[2]; // Read/Write errors
160  int fpu_errs[2]; // Read/Write errors
161  int exc_errs[2]; // Read/Write errors
162  int dbg_errs[2]; // Read/Write errors
163 
165  SetError(GPRRegSet, Read, -1);
166  SetError(FPURegSet, Read, -1);
167  SetError(EXCRegSet, Read, -1);
168  }
169 
170  int GetError(int flavor, uint32_t err_idx) const {
171  if (err_idx < kNumErrors) {
172  switch (flavor) {
173  // When getting all errors, just OR all values together to see if
174  // we got any kind of error.
175  case GPRRegSet:
176  return gpr_errs[err_idx];
177  case FPURegSet:
178  return fpu_errs[err_idx];
179  case EXCRegSet:
180  return exc_errs[err_idx];
181  case DBGRegSet:
182  return dbg_errs[err_idx];
183  default:
184  break;
185  }
186  }
187  return -1;
188  }
189 
190  bool SetError(int flavor, uint32_t err_idx, int err) {
191  if (err_idx < kNumErrors) {
192  switch (flavor) {
193  case GPRRegSet:
194  gpr_errs[err_idx] = err;
195  return true;
196 
197  case FPURegSet:
198  fpu_errs[err_idx] = err;
199  return true;
200 
201  case EXCRegSet:
202  exc_errs[err_idx] = err;
203  return true;
204 
205  case DBGRegSet:
206  exc_errs[err_idx] = err;
207  return true;
208 
209  default:
210  break;
211  }
212  }
213  return false;
214  }
215 
216  bool RegisterSetIsCached(int set) const { return GetError(set, Read) == 0; }
217 
218  int ReadGPR(bool force);
219 
220  int ReadFPU(bool force);
221 
222  int ReadEXC(bool force);
223 
224  int ReadDBG(bool force);
225 
226  int WriteGPR();
227 
228  int WriteFPU();
229 
230  int WriteEXC();
231 
232  int WriteDBG();
233 
234  // Subclasses override these to do the actual reading.
235  virtual int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) { return -1; }
236 
237  virtual int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) = 0;
238 
239  virtual int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) = 0;
240 
241  virtual int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) = 0;
242 
243  virtual int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) = 0;
244 
245  virtual int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) = 0;
246 
247  virtual int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) = 0;
248 
249  virtual int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) = 0;
250 
251  int ReadRegisterSet(uint32_t set, bool force);
252 
253  int WriteRegisterSet(uint32_t set);
254 
255  static uint32_t GetRegisterNumber(uint32_t reg_kind, uint32_t reg_num);
256 
257  static int GetSetForNativeRegNum(int reg_num);
258 
259  static size_t GetRegisterInfosCount();
260 
261  static const lldb_private::RegisterInfo *GetRegisterInfos();
262 };
263 
264 #endif // liblldb_RegisterContextDarwin_arm_h_
virtual int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg)=0
const lldb_private::RegisterInfo * GetRegisterInfoAtIndex(size_t reg) override
static int GetSetForNativeRegNum(int reg_num)
virtual int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc)=0
int ReadRegisterSet(uint32_t set, bool force)
uint32_t SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override
static void LogDBGRegisters(lldb_private::Log *log, const DBG &dbg)
RegisterContextDarwin_arm(lldb_private::Thread &thread, uint32_t concrete_frame_idx)
uint32_t NumSupportedHardwareBreakpoints() override
uint32_t ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind, uint32_t num) override
Convert from a given register numbering scheme to the lldb register numbering scheme.
bool SetError(int flavor, uint32_t err_idx, int err)
virtual int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc)=0
uint32_t NumSupportedHardwareWatchpoints() override
int GetError(int flavor, uint32_t err_idx) const
bool WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override
uint64_t tid_t
Definition: lldb-types.h:86
bool ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &reg_value) override
virtual int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu)=0
struct _GPR GPR
static uint32_t GetRegisterNumber(uint32_t reg_kind, uint32_t reg_num)
bool WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &reg_value) override
static const lldb_private::RegisterInfo * GetRegisterInfos()
bool ClearHardwareWatchpoint(uint32_t hw_index) override
uint64_t addr_t
Definition: lldb-types.h:83
bool ClearHardwareBreakpoint(uint32_t hw_idx) override
virtual int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr)=0
uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read, bool write) override
virtual int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr)
virtual int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu)=0
bool ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override
virtual int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg)=0
const lldb_private::RegisterSet * GetRegisterSet(size_t set) override