1 //===-- RegisterInfoInterface.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_REGISTERINFOINTERFACE_H
10 #define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERINFOINTERFACE_H
11 
12 #include "lldb/Utility/ArchSpec.h"
13 #include "lldb/lldb-private-types.h"
14 #include <vector>
15 
16 namespace lldb_private {
17 
18 /// \class RegisterInfoInterface
19 ///
20 /// RegisterInfo interface to patch RegisterInfo structure for archs.
21 class RegisterInfoInterface {
22 public:
23   RegisterInfoInterface(const lldb_private::ArchSpec &target_arch)
24       : m_target_arch(target_arch) {}
25   virtual ~RegisterInfoInterface() = default;
26 
27   virtual size_t GetGPRSize() const = 0;
28 
29   virtual const lldb_private::RegisterInfo *GetRegisterInfo() const = 0;
30 
31   // Returns the number of registers including the user registers and the
32   // lldb internal registers also
33   virtual uint32_t GetRegisterCount() const = 0;
34 
35   // Returns the number of the user registers (excluding the registers
36   // kept for lldb internal use only). Subclasses should override it if
37   // they belongs to an architecture with lldb internal registers.
38   virtual uint32_t GetUserRegisterCount() const { return GetRegisterCount(); }
39 
40   const lldb_private::ArchSpec &GetTargetArchitecture() const {
41     return m_target_arch;
42   }
43 
44   virtual const lldb_private::RegisterInfo *
45   GetDynamicRegisterInfo(const char *reg_name) const {
46     const std::vector<lldb_private::RegisterInfo> *d_register_infos =
47         GetDynamicRegisterInfoP();
48     if (d_register_infos != nullptr) {
49       std::vector<lldb_private::RegisterInfo>::const_iterator pos =
50           d_register_infos->begin();
51       for (; pos < d_register_infos->end(); pos++) {
52         if (::strcmp(reg_name, pos->name) == 0)
53           return (d_register_infos->data() + (pos - d_register_infos->begin()));
54       }
55     }
56     return nullptr;
57   }
58 
59   virtual const std::vector<lldb_private::RegisterInfo> *
60   GetDynamicRegisterInfoP() const {
61     return nullptr;
62   }
63 
64   // FIXME make private.
65   lldb_private::ArchSpec m_target_arch;
66 };
67 }
68 
69 #endif
70