1 //===-- RegisterContextPOSIXProcessMonitor_arm.cpp -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===---------------------------------------------------------------------===//
10 #include "lldb/Target/Thread.h"
11 #include "lldb/Utility/DataBufferHeap.h"
12 #include "lldb/Utility/RegisterValue.h"
14 #include "ProcessFreeBSD.h"
15 #include "ProcessMonitor.h"
16 #include "RegisterContextPOSIXProcessMonitor_arm.h"
17 #include "Plugins/Process/Utility/RegisterContextPOSIX_arm.h"
19 using namespace lldb_private;
22 #define REG_CONTEXT_SIZE (GetGPRSize())
24 RegisterContextPOSIXProcessMonitor_arm::RegisterContextPOSIXProcessMonitor_arm(
25 Thread &thread, uint32_t concrete_frame_idx,
26 lldb_private::RegisterInfoInterface *register_info)
27 : RegisterContextPOSIX_arm(thread, concrete_frame_idx, register_info) {}
29 ProcessMonitor &RegisterContextPOSIXProcessMonitor_arm::GetMonitor() {
30 ProcessSP base = CalculateProcess();
31 ProcessFreeBSD *process = static_cast<ProcessFreeBSD *>(base.get());
32 return process->GetMonitor();
35 bool RegisterContextPOSIXProcessMonitor_arm::ReadGPR() {
36 ProcessMonitor &monitor = GetMonitor();
37 return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize());
40 bool RegisterContextPOSIXProcessMonitor_arm::ReadFPR() {
41 ProcessMonitor &monitor = GetMonitor();
42 return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr));
45 bool RegisterContextPOSIXProcessMonitor_arm::WriteGPR() {
46 ProcessMonitor &monitor = GetMonitor();
47 return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm, GetGPRSize());
50 bool RegisterContextPOSIXProcessMonitor_arm::WriteFPR() {
51 ProcessMonitor &monitor = GetMonitor();
52 return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof(m_fpr));
55 bool RegisterContextPOSIXProcessMonitor_arm::ReadRegister(
56 const unsigned reg, RegisterValue &value) {
57 ProcessMonitor &monitor = GetMonitor();
58 return monitor.ReadRegisterValue(m_thread.GetID(), GetRegisterOffset(reg),
59 GetRegisterName(reg), GetRegisterSize(reg),
63 bool RegisterContextPOSIXProcessMonitor_arm::WriteRegister(
64 const unsigned reg, const RegisterValue &value) {
65 unsigned reg_to_write = reg;
66 RegisterValue value_to_write = value;
68 // Check if this is a subregister of a full register.
69 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
70 if (reg_info->invalidate_regs &&
71 (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) {
72 RegisterValue full_value;
73 uint32_t full_reg = reg_info->invalidate_regs[0];
74 const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
76 // Read the full register.
77 if (ReadRegister(full_reg_info, full_value)) {
79 ByteOrder byte_order = GetByteOrder();
80 uint8_t dst[RegisterValue::kMaxRegisterByteSize];
82 // Get the bytes for the full register.
83 const uint32_t dest_size = full_value.GetAsMemoryData(
84 full_reg_info, dst, sizeof(dst), byte_order, error);
85 if (error.Success() && dest_size) {
86 uint8_t src[RegisterValue::kMaxRegisterByteSize];
88 // Get the bytes for the source data.
89 const uint32_t src_size = value.GetAsMemoryData(
90 reg_info, src, sizeof(src), byte_order, error);
91 if (error.Success() && src_size && (src_size < dest_size)) {
92 // Copy the src bytes to the destination.
93 memcpy(dst + (reg_info->byte_offset & 0x1), src, src_size);
94 // Set this full register as the value to write.
95 value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
96 value_to_write.SetType(full_reg_info);
97 reg_to_write = full_reg;
103 ProcessMonitor &monitor = GetMonitor();
104 return monitor.WriteRegisterValue(
105 m_thread.GetID(), GetRegisterOffset(reg_to_write),
106 GetRegisterName(reg_to_write), value_to_write);
109 bool RegisterContextPOSIXProcessMonitor_arm::ReadRegister(
110 const RegisterInfo *reg_info, RegisterValue &value) {
114 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
120 return ReadRegister(reg, value);
123 // Get pointer to m_fpr variable and set the data from it.
124 assert(reg_info->byte_offset < sizeof m_fpr);
125 uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset;
126 switch (reg_info->byte_size) {
128 value.SetUInt16(*(uint16_t *)src);
131 value.SetUInt32(*(uint32_t *)src);
134 value.SetUInt64(*(uint64_t *)src);
137 assert(false && "Unhandled data size.");
142 bool RegisterContextPOSIXProcessMonitor_arm::WriteRegister(
143 const RegisterInfo *reg_info, const RegisterValue &value) {
144 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
147 return WriteRegister(reg, value);
148 } else if (IsFPR(reg)) {
155 bool RegisterContextPOSIXProcessMonitor_arm::ReadAllRegisterValues(
156 DataBufferSP &data_sp) {
157 bool success = false;
158 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0));
159 if (data_sp && ReadGPR() && ReadFPR()) {
160 uint8_t *dst = data_sp->GetBytes();
164 ::memcpy(dst, &m_gpr_arm, GetGPRSize());
166 ::memcpy(dst, &m_fpr, sizeof(m_fpr));
172 bool RegisterContextPOSIXProcessMonitor_arm::WriteAllRegisterValues(
173 const DataBufferSP &data_sp) {
174 bool success = false;
175 if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) {
176 uint8_t *src = data_sp->GetBytes();
178 ::memcpy(&m_gpr_arm, src, GetGPRSize());
182 ::memcpy(&m_fpr, src, sizeof(m_fpr));
184 success = WriteFPR();
191 uint32_t RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpoint(
192 addr_t addr, size_t size, bool read, bool write) {
193 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
196 for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) {
197 if (IsWatchpointVacant(hw_index))
198 return SetHardwareWatchpointWithIndex(addr, size, read, write, hw_index);
201 return LLDB_INVALID_INDEX32;
204 bool RegisterContextPOSIXProcessMonitor_arm::ClearHardwareWatchpoint(
209 bool RegisterContextPOSIXProcessMonitor_arm::HardwareSingleStep(bool enable) {
213 bool RegisterContextPOSIXProcessMonitor_arm::UpdateAfterBreakpoint() {
216 if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
222 unsigned RegisterContextPOSIXProcessMonitor_arm::GetRegisterIndexFromOffset(
225 for (reg = 0; reg < k_num_registers_arm; reg++) {
226 if (GetRegisterInfo()[reg].byte_offset == offset)
229 assert(reg < k_num_registers_arm && "Invalid register offset.");
233 bool RegisterContextPOSIXProcessMonitor_arm::IsWatchpointHit(
238 bool RegisterContextPOSIXProcessMonitor_arm::ClearWatchpointHits() {
242 addr_t RegisterContextPOSIXProcessMonitor_arm::GetWatchpointAddress(
244 return LLDB_INVALID_ADDRESS;
247 bool RegisterContextPOSIXProcessMonitor_arm::IsWatchpointVacant(
252 bool RegisterContextPOSIXProcessMonitor_arm::SetHardwareWatchpointWithIndex(
253 addr_t addr, size_t size, bool read, bool write, uint32_t hw_index) {
258 RegisterContextPOSIXProcessMonitor_arm::NumSupportedHardwareWatchpoints() {