1 //===-- RegisterContextPOSIXProcessMonitor_arm.cpp -----------*- C++ -*-===//
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
7 //===---------------------------------------------------------------------===//
9 #include "lldb/Target/Thread.h"
10 #include "lldb/Utility/DataBufferHeap.h"
11 #include "lldb/Utility/RegisterValue.h"
13 #include "ProcessFreeBSD.h"
14 #include "ProcessMonitor.h"
15 #include "RegisterContextPOSIXProcessMonitor_arm.h"
16 #include "Plugins/Process/Utility/RegisterContextPOSIX_arm.h"
18 using namespace lldb_private;
21 #define REG_CONTEXT_SIZE (GetGPRSize())
23 RegisterContextPOSIXProcessMonitor_arm::RegisterContextPOSIXProcessMonitor_arm(
24 Thread &thread, uint32_t concrete_frame_idx,
25 lldb_private::RegisterInfoInterface *register_info)
26 : RegisterContextPOSIX_arm(thread, concrete_frame_idx, register_info) {}
28 ProcessMonitor &RegisterContextPOSIXProcessMonitor_arm::GetMonitor() {
29 ProcessSP base = CalculateProcess();
30 ProcessFreeBSD *process = static_cast<ProcessFreeBSD *>(base.get());
31 return process->GetMonitor();
34 bool RegisterContextPOSIXProcessMonitor_arm::ReadGPR() {
35 ProcessMonitor &monitor = GetMonitor();
36 return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize());
39 bool RegisterContextPOSIXProcessMonitor_arm::ReadFPR() {
40 ProcessMonitor &monitor = GetMonitor();
41 return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr));
44 bool RegisterContextPOSIXProcessMonitor_arm::WriteGPR() {
45 ProcessMonitor &monitor = GetMonitor();
46 return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize());
49 bool RegisterContextPOSIXProcessMonitor_arm::WriteFPR() {
50 ProcessMonitor &monitor = GetMonitor();
51 return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr));
54 bool RegisterContextPOSIXProcessMonitor_arm::ReadRegister(
55 const unsigned reg, RegisterValue &value) {
56 ProcessMonitor &monitor = GetMonitor();
57 return monitor.ReadRegisterValue(m_thread.GetID(), GetRegisterOffset(reg),
58 GetRegisterName(reg), GetRegisterSize(reg),
62 bool RegisterContextPOSIXProcessMonitor_arm::WriteRegister(
63 const unsigned reg, const RegisterValue &value) {
64 unsigned reg_to_write = reg;
65 RegisterValue value_to_write = value;
67 // Check if this is a subregister of a full register.
68 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
69 if (reg_info->invalidate_regs &&
70 (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) {
71 RegisterValue full_value;
72 uint32_t full_reg = reg_info->invalidate_regs[0];
73 const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
75 // Read the full register.
76 if (ReadRegister(full_reg_info, full_value)) {
78 ByteOrder byte_order = GetByteOrder();
79 uint8_t dst[RegisterValue::kMaxRegisterByteSize];
81 // Get the bytes for the full register.
82 const uint32_t dest_size = full_value.GetAsMemoryData(
83 full_reg_info, dst, sizeof(dst), byte_order, error);
84 if (error.Success() && dest_size) {
85 uint8_t src[RegisterValue::kMaxRegisterByteSize];
87 // Get the bytes for the source data.
88 const uint32_t src_size = value.GetAsMemoryData(
89 reg_info, src, sizeof(src), byte_order, error);
90 if (error.Success() && src_size && (src_size < dest_size)) {
91 // Copy the src bytes to the destination.
92 memcpy(dst + (reg_info->byte_offset & 0x1), src, src_size);
93 // Set this full register as the value to write.
94 value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
95 value_to_write.SetType(full_reg_info);
96 reg_to_write = full_reg;
102 ProcessMonitor &monitor = GetMonitor();
103 return monitor.WriteRegisterValue(
104 m_thread.GetID(), GetRegisterOffset(reg_to_write),
105 GetRegisterName(reg_to_write), value_to_write);
108 bool RegisterContextPOSIXProcessMonitor_arm::ReadRegister(
109 const RegisterInfo *reg_info, RegisterValue &value) {
113 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
119 return ReadRegister(reg, value);
122 // Get pointer to m_fpr variable and set the data from it.
123 assert(reg_info->byte_offset < sizeof m_fpr);
124 uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset;
125 switch (reg_info->byte_size) {
127 value.SetUInt16(*(uint16_t *)src);
130 value.SetUInt32(*(uint32_t *)src);
133 value.SetUInt64(*(uint64_t *)src);
136 assert(false && "Unhandled data size.");
141 bool RegisterContextPOSIXProcessMonitor_arm::WriteRegister(
142 const RegisterInfo *reg_info, const RegisterValue &value) {
143 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
146 return WriteRegister(reg, value);
147 } else if (IsFPR(reg)) {
154 bool RegisterContextPOSIXProcessMonitor_arm::ReadAllRegisterValues(
155 DataBufferSP &data_sp) {
156 bool success = false;
157 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0));
158 if (ReadGPR() && ReadFPR()) {
159 uint8_t *dst = data_sp->GetBytes();
163 ::memcpy(dst, &m_gpr_arm, GetGPRSize());
165 ::memcpy(dst, &m_fpr, sizeof(m_fpr));
171 bool RegisterContextPOSIXProcessMonitor_arm::WriteAllRegisterValues(
172 const DataBufferSP &data_sp) {
173 bool success = false;
174 if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) {
175 uint8_t *src = data_sp->GetBytes();
177 ::memcpy(&m_gpr_arm, src, GetGPRSize());
181 ::memcpy(&m_fpr, src, sizeof(m_fpr));
183 success = WriteFPR();
190 uint32_t RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpoint(
191 addr_t addr, size_t size, bool read, bool write) {
192 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
195 for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) {
196 if (IsWatchpointVacant(hw_index))
197 return SetHardwareWatchpointWithIndex(addr, size, read, write, hw_index);
200 return LLDB_INVALID_INDEX32;
203 bool RegisterContextPOSIXProcessMonitor_arm::ClearHardwareWatchpoint(
208 bool RegisterContextPOSIXProcessMonitor_arm::HardwareSingleStep(bool enable) {
212 bool RegisterContextPOSIXProcessMonitor_arm::UpdateAfterBreakpoint() {
215 if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
221 unsigned RegisterContextPOSIXProcessMonitor_arm::GetRegisterIndexFromOffset(
224 for (reg = 0; reg < k_num_registers_arm; reg++) {
225 if (GetRegisterInfo()[reg].byte_offset == offset)
228 assert(reg < k_num_registers_arm && "Invalid register offset.");
232 bool RegisterContextPOSIXProcessMonitor_arm::IsWatchpointHit(
237 bool RegisterContextPOSIXProcessMonitor_arm::ClearWatchpointHits() {
241 addr_t RegisterContextPOSIXProcessMonitor_arm::GetWatchpointAddress(
243 return LLDB_INVALID_ADDRESS;
246 bool RegisterContextPOSIXProcessMonitor_arm::IsWatchpointVacant(
251 bool RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpointWithIndex(
252 addr_t addr, size_t size, bool read, bool write, uint32_t hw_index) {
257 RegisterContextPOSIXProcessMonitor_arm::NumSupportedHardwareWatchpoints() {