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