1 //===-- RegisterContextPOSIX_arm.h ------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef liblldb_RegisterContextPOSIX_arm_h_
11 #define liblldb_RegisterContextPOSIX_arm_h_
12 
13 #include "RegisterInfoInterface.h"
14 #include "lldb-arm-register-enums.h"
15 #include "lldb/Target/RegisterContext.h"
16 #include "lldb/Utility/Log.h"
17 
18 class ProcessMonitor;
19 
20 class RegisterContextPOSIX_arm : public lldb_private::RegisterContext {
21 public:
22   RegisterContextPOSIX_arm(lldb_private::Thread &thread,
23                            uint32_t concrete_frame_idx,
24                            lldb_private::RegisterInfoInterface *register_info);
25 
26   ~RegisterContextPOSIX_arm() override;
27 
28   void Invalidate();
29 
30   void InvalidateAllRegisters() override;
31 
32   size_t GetRegisterCount() override;
33 
34   virtual size_t GetGPRSize();
35 
36   virtual unsigned GetRegisterSize(unsigned reg);
37 
38   virtual unsigned GetRegisterOffset(unsigned reg);
39 
40   const lldb_private::RegisterInfo *GetRegisterInfoAtIndex(size_t reg) override;
41 
42   size_t GetRegisterSetCount() override;
43 
44   const lldb_private::RegisterSet *GetRegisterSet(size_t set) override;
45 
46   const char *GetRegisterName(unsigned reg);
47 
48   uint32_t ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,
49                                                uint32_t num) override;
50 
51 protected:
52   struct RegInfo {
53     uint32_t num_registers;
54     uint32_t num_gpr_registers;
55     uint32_t num_fpr_registers;
56 
57     uint32_t last_gpr;
58     uint32_t first_fpr;
59     uint32_t last_fpr;
60 
61     uint32_t first_fpr_v;
62     uint32_t last_fpr_v;
63 
64     uint32_t gpr_flags;
65   };
66 
67   struct QReg {
68     uint8_t bytes[16];
69   };
70 
71   struct FPU {
72     union {
73       uint32_t s[32];
74       uint64_t d[32];
75       QReg q[16]; // the 128-bit NEON registers
76     } floats;
77     uint32_t fpscr;
78   };
79 
80   uint32_t m_gpr_arm[lldb_private::k_num_gpr_registers_arm]; // 32-bit general
81                                                              // purpose
82                                                              // registers.
83   RegInfo m_reg_info;
84   struct RegisterContextPOSIX_arm::FPU
85       m_fpr; // floating-point registers including extended register sets.
86   std::unique_ptr<lldb_private::RegisterInfoInterface>
87       m_register_info_ap; // Register Info Interface (FreeBSD or Linux)
88 
89   // Determines if an extended register set is supported on the processor
90   // running the inferior process.
91   virtual bool IsRegisterSetAvailable(size_t set_index);
92 
93   virtual const lldb_private::RegisterInfo *GetRegisterInfo();
94 
95   bool IsGPR(unsigned reg);
96 
97   bool IsFPR(unsigned reg);
98 
99   lldb::ByteOrder GetByteOrder();
100 
101   virtual bool ReadGPR() = 0;
102   virtual bool ReadFPR() = 0;
103   virtual bool WriteGPR() = 0;
104   virtual bool WriteFPR() = 0;
105 };
106 
107 #endif // liblldb_RegisterContextPOSIX_arm_h_
108