1//===-- RegisterContextDummy.cpp ---------------------------------*- C++
2//-*-===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Core/Address.h"
11#include "lldb/Core/AddressRange.h"
12#include "lldb/Core/Module.h"
13#include "lldb/Core/Value.h"
14#include "lldb/Expression/DWARFExpression.h"
15#include "lldb/Symbol/FuncUnwinders.h"
16#include "lldb/Symbol/Function.h"
17#include "lldb/Symbol/ObjectFile.h"
18#include "lldb/Symbol/Symbol.h"
19#include "lldb/Symbol/SymbolContext.h"
20#include "lldb/Target/ABI.h"
21#include "lldb/Target/DynamicLoader.h"
22#include "lldb/Target/ExecutionContext.h"
23#include "lldb/Target/Process.h"
24#include "lldb/Target/StackFrame.h"
25#include "lldb/Target/Target.h"
26#include "lldb/Target/Thread.h"
27#include "lldb/Utility/DataBufferHeap.h"
28#include "lldb/Utility/Log.h"
29#include "lldb/Utility/RegisterValue.h"
30#include "lldb/lldb-private.h"
31
32#include "RegisterContextDummy.h"
33
34using namespace lldb;
35using namespace lldb_private;
36
37RegisterContextDummy::RegisterContextDummy(Thread &thread,
38                                           uint32_t concrete_frame_idx,
39                                           uint32_t address_byte_size)
40    : RegisterContext(thread, concrete_frame_idx) {
41  m_reg_set0.name = "General Purpose Registers";
42  m_reg_set0.short_name = "GPR";
43  m_reg_set0.num_registers = 1;
44  m_reg_set0.registers = new uint32_t(0);
45
46  m_pc_reg_info.name = "pc";
47  m_pc_reg_info.alt_name = "pc";
48  m_pc_reg_info.byte_offset = 0;
49  m_pc_reg_info.byte_size = address_byte_size;
50  m_pc_reg_info.encoding = eEncodingUint;
51  m_pc_reg_info.format = eFormatPointer;
52  m_pc_reg_info.invalidate_regs = nullptr;
53  m_pc_reg_info.value_regs = nullptr;
54  m_pc_reg_info.kinds[eRegisterKindEHFrame] = LLDB_INVALID_REGNUM;
55  m_pc_reg_info.kinds[eRegisterKindDWARF] = LLDB_INVALID_REGNUM;
56  m_pc_reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC;
57  m_pc_reg_info.kinds[eRegisterKindProcessPlugin] = LLDB_INVALID_REGNUM;
58  m_pc_reg_info.kinds[eRegisterKindLLDB] = LLDB_INVALID_REGNUM;
59}
60
61RegisterContextDummy::~RegisterContextDummy() {
62  delete m_reg_set0.registers;
63  delete m_pc_reg_info.invalidate_regs;
64  delete m_pc_reg_info.value_regs;
65}
66
67void RegisterContextDummy::InvalidateAllRegisters() {}
68
69size_t RegisterContextDummy::GetRegisterCount() { return 1; }
70
71const lldb_private::RegisterInfo *
72RegisterContextDummy::GetRegisterInfoAtIndex(size_t reg) {
73  if (reg)
74    return nullptr;
75  return &m_pc_reg_info;
76}
77
78size_t RegisterContextDummy::GetRegisterSetCount() { return 1; }
79
80const lldb_private::RegisterSet *
81RegisterContextDummy::GetRegisterSet(size_t reg_set) {
82  if (reg_set)
83    return nullptr;
84  return &m_reg_set0;
85}
86
87bool RegisterContextDummy::ReadRegister(
88    const lldb_private::RegisterInfo *reg_info,
89    lldb_private::RegisterValue &value) {
90  if (!reg_info)
91    return false;
92  uint32_t reg_number = reg_info->kinds[eRegisterKindGeneric];
93  if (reg_number == LLDB_REGNUM_GENERIC_PC) {
94    value.SetUInt(LLDB_INVALID_ADDRESS, reg_info->byte_size);
95    return true;
96  }
97  return false;
98}
99
100bool RegisterContextDummy::WriteRegister(
101    const lldb_private::RegisterInfo *reg_info,
102    const lldb_private::RegisterValue &value) {
103  return false;
104}
105
106bool RegisterContextDummy::ReadAllRegisterValues(lldb::DataBufferSP &data_sp) {
107  return false;
108}
109
110bool RegisterContextDummy::WriteAllRegisterValues(
111    const lldb::DataBufferSP &data_sp) {
112  return false;
113}
114
115uint32_t RegisterContextDummy::ConvertRegisterKindToRegisterNumber(
116    lldb::RegisterKind kind, uint32_t num) {
117  if (kind == eRegisterKindGeneric && num == LLDB_REGNUM_GENERIC_PC)
118    return 0;
119  return LLDB_INVALID_REGNUM;
120}
121