1 //===-- RegisterContext.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 liblldb_RegisterContext_h_
11 #define liblldb_RegisterContext_h_
15 // Other libraries and framework includes
17 #include "lldb/lldb-private.h"
18 #include "lldb/Target/ExecutionContextScope.h"
20 namespace lldb_private {
22 class RegisterContext :
23 public std::enable_shared_from_this<RegisterContext>,
24 public ExecutionContextScope
27 //------------------------------------------------------------------
28 // Constructors and Destructors
29 //------------------------------------------------------------------
30 RegisterContext (Thread &thread, uint32_t concrete_frame_idx);
36 InvalidateIfNeeded (bool force);
38 //------------------------------------------------------------------
39 // Subclasses must override these functions
40 //------------------------------------------------------------------
42 InvalidateAllRegisters () = 0;
45 GetRegisterCount () = 0;
47 virtual const RegisterInfo *
48 GetRegisterInfoAtIndex (size_t reg) = 0;
51 GetRegisterSetCount () = 0;
53 virtual const RegisterSet *
54 GetRegisterSet (size_t reg_set) = 0;
57 ReadRegister (const RegisterInfo *reg_info, RegisterValue ®_value) = 0;
60 WriteRegister (const RegisterInfo *reg_info, const RegisterValue ®_value) = 0;
62 // These two functions are used to implement "push" and "pop" of register states. They are used primarily
63 // for expression evaluation, where we need to push a new state (storing the old one in data_sp) and then
64 // restoring the original state by passing the data_sp we got from ReadAllRegisters to WriteAllRegisterValues.
65 // ReadAllRegisters will do what is necessary to return a coherent set of register values for this thread, which
66 // may mean e.g. interrupting a thread that is sitting in a kernel trap. That is a somewhat disruptive operation,
67 // so these API's should only be used when this behavior is needed.
70 ReadAllRegisterValues (lldb::DataBufferSP &data_sp) = 0;
73 WriteAllRegisterValues (const lldb::DataBufferSP &data_sp) = 0;
76 CopyFromRegisterContext (lldb::RegisterContextSP context);
79 ConvertRegisterKindToRegisterNumber (uint32_t kind, uint32_t num) = 0;
81 //------------------------------------------------------------------
82 // Subclasses can override these functions if desired
83 //------------------------------------------------------------------
85 NumSupportedHardwareBreakpoints ();
88 SetHardwareBreakpoint (lldb::addr_t addr, size_t size);
91 ClearHardwareBreakpoint (uint32_t hw_idx);
94 NumSupportedHardwareWatchpoints ();
97 SetHardwareWatchpoint (lldb::addr_t addr, size_t size, bool read, bool write);
100 ClearHardwareWatchpoint (uint32_t hw_index);
103 HardwareSingleStep (bool enable);
106 ReadRegisterValueFromMemory (const lldb_private::RegisterInfo *reg_info, lldb::addr_t src_addr, uint32_t src_len, RegisterValue ®_value);
109 WriteRegisterValueToMemory (const lldb_private::RegisterInfo *reg_info, lldb::addr_t dst_addr, uint32_t dst_len, const RegisterValue ®_value);
111 //------------------------------------------------------------------
112 // Subclasses should not override these
113 //------------------------------------------------------------------
124 GetRegisterInfoByName (const char *reg_name, uint32_t start_idx = 0);
127 GetPC (uint64_t fail_value = LLDB_INVALID_ADDRESS);
133 GetSP (uint64_t fail_value = LLDB_INVALID_ADDRESS);
139 GetFP (uint64_t fail_value = LLDB_INVALID_ADDRESS);
145 GetRegisterName (uint32_t reg);
148 GetReturnAddress (uint64_t fail_value = LLDB_INVALID_ADDRESS);
151 GetFlags (uint64_t fail_value = 0);
154 ReadRegisterAsUnsigned (uint32_t reg, uint64_t fail_value);
157 ReadRegisterAsUnsigned (const RegisterInfo *reg_info, uint64_t fail_value);
160 WriteRegisterFromUnsigned (uint32_t reg, uint64_t uval);
163 WriteRegisterFromUnsigned (const RegisterInfo *reg_info, uint64_t uval);
165 ConvertBetweenRegisterKinds (int source_rk, uint32_t source_regnum, int target_rk, uint32_t& target_regnum);
167 //------------------------------------------------------------------
168 // lldb::ExecutionContextScope pure virtual functions
169 //------------------------------------------------------------------
170 virtual lldb::TargetSP
173 virtual lldb::ProcessSP
176 virtual lldb::ThreadSP
179 virtual lldb::StackFrameSP
180 CalculateStackFrame ();
183 CalculateExecutionContext (ExecutionContext &exe_ctx);
192 SetStopID (uint32_t stop_id)
198 //------------------------------------------------------------------
199 // Classes that inherit from RegisterContext can see and modify these
200 //------------------------------------------------------------------
201 Thread &m_thread; // The thread that this register context belongs to.
202 uint32_t m_concrete_frame_idx; // The concrete frame index for this register context
203 uint32_t m_stop_id; // The stop ID that any data in this context is valid for
205 //------------------------------------------------------------------
206 // For RegisterContext only
207 //------------------------------------------------------------------
208 DISALLOW_COPY_AND_ASSIGN (RegisterContext);
211 } // namespace lldb_private
213 #endif // liblldb_RegisterContext_h_