1 //===-- DynamicRegisterInfo.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_TARGET_DYNAMICREGISTERINFO_H
10 #define LLDB_TARGET_DYNAMICREGISTERINFO_H
11 
12 #include <map>
13 #include <vector>
14 
15 #include "lldb/Target/RegisterFlags.h"
16 #include "lldb/Utility/ConstString.h"
17 #include "lldb/Utility/StructuredData.h"
18 #include "lldb/lldb-private.h"
19 
20 namespace lldb_private {
21 
22 class DynamicRegisterInfo {
23 protected:
24   DynamicRegisterInfo(DynamicRegisterInfo &) = default;
25   DynamicRegisterInfo &operator=(DynamicRegisterInfo &) = default;
26 
27 public:
28   struct Register {
29     ConstString name;
30     ConstString alt_name;
31     ConstString set_name;
32     uint32_t byte_size = LLDB_INVALID_INDEX32;
33     uint32_t byte_offset = LLDB_INVALID_INDEX32;
34     lldb::Encoding encoding = lldb::eEncodingUint;
35     lldb::Format format = lldb::eFormatHex;
36     uint32_t regnum_dwarf = LLDB_INVALID_REGNUM;
37     uint32_t regnum_ehframe = LLDB_INVALID_REGNUM;
38     uint32_t regnum_generic = LLDB_INVALID_REGNUM;
39     uint32_t regnum_remote = LLDB_INVALID_REGNUM;
40     std::vector<uint32_t> value_regs;
41     std::vector<uint32_t> invalidate_regs;
42     uint32_t value_reg_offset = 0;
43     // Non-null if there is an XML provided type.
44     const RegisterFlags *flags_type = nullptr;
45   };
46 
47   DynamicRegisterInfo() = default;
48 
49   static std::unique_ptr<DynamicRegisterInfo>
50   Create(const StructuredData::Dictionary &dict, const ArchSpec &arch);
51 
52   virtual ~DynamicRegisterInfo() = default;
53 
54   DynamicRegisterInfo(DynamicRegisterInfo &&info);
55   DynamicRegisterInfo &operator=(DynamicRegisterInfo &&info);
56 
57   size_t SetRegisterInfo(const lldb_private::StructuredData::Dictionary &dict,
58                          const lldb_private::ArchSpec &arch);
59 
60   size_t SetRegisterInfo(std::vector<Register> &&regs,
61                          const lldb_private::ArchSpec &arch);
62 
63   size_t GetNumRegisters() const;
64 
65   size_t GetNumRegisterSets() const;
66 
67   size_t GetRegisterDataByteSize() const;
68 
69   const lldb_private::RegisterInfo *GetRegisterInfoAtIndex(uint32_t i) const;
70 
71   const lldb_private::RegisterSet *GetRegisterSet(uint32_t i) const;
72 
73   uint32_t GetRegisterSetIndexByName(const lldb_private::ConstString &set_name,
74                                      bool can_create);
75 
76   uint32_t ConvertRegisterKindToRegisterNumber(uint32_t kind,
77                                                uint32_t num) const;
78 
79   const lldb_private::RegisterInfo *GetRegisterInfo(uint32_t kind,
80                                                     uint32_t num) const;
81 
82   void Dump() const;
83 
84   void Clear();
85 
86   bool IsReconfigurable();
87 
88   const lldb_private::RegisterInfo *
89   GetRegisterInfo(llvm::StringRef reg_name) const;
90 
91   typedef std::vector<lldb_private::RegisterInfo> reg_collection;
92   llvm::iterator_range<reg_collection::const_iterator> registers() const {
93     return llvm::iterator_range<reg_collection::const_iterator>(m_regs);
94   }
95 
96 protected:
97   // Classes that inherit from DynamicRegisterInfo can see and modify these
98   typedef std::vector<lldb_private::RegisterSet> set_collection;
99   typedef std::vector<uint32_t> reg_num_collection;
100   typedef std::vector<reg_num_collection> set_reg_num_collection;
101   typedef std::vector<lldb_private::ConstString> name_collection;
102   typedef std::map<uint32_t, reg_num_collection> reg_to_regs_map;
103   typedef std::map<uint32_t, uint32_t> reg_offset_map;
104 
105   llvm::Expected<uint32_t> ByteOffsetFromSlice(uint32_t index,
106                                                llvm::StringRef slice_str,
107                                                lldb::ByteOrder byte_order);
108   llvm::Expected<uint32_t> ByteOffsetFromComposite(
109       uint32_t index, lldb_private::StructuredData::Array &composite_reg_list,
110       lldb::ByteOrder byte_order);
111   llvm::Expected<uint32_t> ByteOffsetFromRegInfoDict(
112       uint32_t index, lldb_private::StructuredData::Dictionary &reg_info_dict,
113       lldb::ByteOrder byte_order);
114 
115   void MoveFrom(DynamicRegisterInfo &&info);
116 
117   void Finalize(const lldb_private::ArchSpec &arch);
118 
119   void ConfigureOffsets();
120 
121   reg_collection m_regs;
122   set_collection m_sets;
123   set_reg_num_collection m_set_reg_nums;
124   name_collection m_set_names;
125   reg_to_regs_map m_value_regs_map;
126   reg_to_regs_map m_invalidate_regs_map;
127   reg_offset_map m_value_reg_offset_map;
128   size_t m_reg_data_byte_size = 0u; // The number of bytes required to store
129                                     // all registers
130   bool m_finalized = false;
131   bool m_is_reconfigurable = false;
132 };
133 
134 void addSupplementaryRegister(std::vector<DynamicRegisterInfo::Register> &regs,
135                               DynamicRegisterInfo::Register new_reg_info);
136 
137 } // namespace lldb_private
138 
139 #endif // LLDB_TARGET_DYNAMICREGISTERINFO_H
140