1 //===-- NativeRegisterContextLinux.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_NativeRegisterContextLinux_h
10 #define lldb_NativeRegisterContextLinux_h
11 
12 #include "Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h"
13 #include "lldb/Host/common/NativeThreadProtocol.h"
14 
15 namespace lldb_private {
16 namespace process_linux {
17 
18 class NativeRegisterContextLinux : public NativeRegisterContextRegisterInfo {
19 public:
20   NativeRegisterContextLinux(NativeThreadProtocol &native_thread,
21                              RegisterInfoInterface *reg_info_interface_p);
22 
23   // This function is implemented in the NativeRegisterContextLinux_* subclasses
24   // to create a new instance of the host specific NativeRegisterContextLinux.
25   // The implementations can't collide as only one NativeRegisterContextLinux_*
26   // variant should be compiled into the final executable.
27   static std::unique_ptr<NativeRegisterContextLinux>
28   CreateHostNativeRegisterContextLinux(const ArchSpec &target_arch,
29                                        NativeThreadProtocol &native_thread);
30 
31   // Invalidates cached values in register context data structures
InvalidateAllRegisters()32   virtual void InvalidateAllRegisters(){}
33 
34 protected:
35   lldb::ByteOrder GetByteOrder() const;
36 
37   virtual Status ReadRegisterRaw(uint32_t reg_index, RegisterValue &reg_value);
38 
39   virtual Status WriteRegisterRaw(uint32_t reg_index,
40                                   const RegisterValue &reg_value);
41 
42   virtual Status ReadRegisterSet(void *buf, size_t buf_size,
43                                  unsigned int regset);
44 
45   virtual Status WriteRegisterSet(void *buf, size_t buf_size,
46                                   unsigned int regset);
47 
48   virtual Status ReadGPR();
49 
50   virtual Status WriteGPR();
51 
52   virtual Status ReadFPR();
53 
54   virtual Status WriteFPR();
55 
56   virtual void *GetGPRBuffer() = 0;
57 
GetGPRSize()58   virtual size_t GetGPRSize() const {
59     return GetRegisterInfoInterface().GetGPRSize();
60   }
61 
62   virtual void *GetFPRBuffer() = 0;
63 
64   virtual size_t GetFPRSize() = 0;
65 
GetPtraceOffset(uint32_t reg_index)66   virtual uint32_t GetPtraceOffset(uint32_t reg_index) {
67     return GetRegisterInfoAtIndex(reg_index)->byte_offset;
68   }
69 
70   // The Do*** functions are executed on the privileged thread and can perform
71   // ptrace
72   // operations directly.
73   virtual Status DoReadRegisterValue(uint32_t offset, const char *reg_name,
74                                      uint32_t size, RegisterValue &value);
75 
76   virtual Status DoWriteRegisterValue(uint32_t offset, const char *reg_name,
77                                       const RegisterValue &value);
78 };
79 
80 } // namespace process_linux
81 } // namespace lldb_private
82 
83 #endif // #ifndef lldb_NativeRegisterContextLinux_h
84