1 //===-- RegisterContextPOSIXProcessMonitor_arm64.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 "Plugins/Process/Utility/RegisterContextPOSIX_arm64.h"
15 #include "ProcessFreeBSD.h"
16 #include "ProcessMonitor.h"
17 #include "RegisterContextPOSIXProcessMonitor_arm64.h"
19 #define REG_CONTEXT_SIZE (GetGPRSize())
22 using namespace lldb_private;
24 RegisterContextPOSIXProcessMonitor_arm64::
25 RegisterContextPOSIXProcessMonitor_arm64(
26 lldb_private::Thread &thread, uint32_t concrete_frame_idx,
27 lldb_private::RegisterInfoInterface *register_info)
28 : RegisterContextPOSIX_arm64(thread, concrete_frame_idx, register_info) {}
30 ProcessMonitor &RegisterContextPOSIXProcessMonitor_arm64::GetMonitor() {
31 lldb::ProcessSP base = CalculateProcess();
32 ProcessFreeBSD *process = static_cast<ProcessFreeBSD *>(base.get());
33 return process->GetMonitor();
36 bool RegisterContextPOSIXProcessMonitor_arm64::ReadGPR() {
37 ProcessMonitor &monitor = GetMonitor();
38 return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize());
41 bool RegisterContextPOSIXProcessMonitor_arm64::ReadFPR() {
42 ProcessMonitor &monitor = GetMonitor();
43 return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr);
46 bool RegisterContextPOSIXProcessMonitor_arm64::WriteGPR() {
47 ProcessMonitor &monitor = GetMonitor();
48 return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize());
51 bool RegisterContextPOSIXProcessMonitor_arm64::WriteFPR() {
52 ProcessMonitor &monitor = GetMonitor();
53 return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr);
56 bool RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(
57 const unsigned reg, lldb_private::RegisterValue &value) {
58 ProcessMonitor &monitor = GetMonitor();
59 return monitor.ReadRegisterValue(m_thread.GetID(), GetRegisterOffset(reg),
60 GetRegisterName(reg), GetRegisterSize(reg),
64 bool RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(
65 const unsigned reg, const lldb_private::RegisterValue &value) {
66 unsigned reg_to_write = reg;
67 lldb_private::RegisterValue value_to_write = value;
69 // Check if this is a subregister of a full register.
70 const lldb_private::RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
71 if (reg_info->invalidate_regs &&
72 (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) {
73 lldb_private::RegisterValue full_value;
74 uint32_t full_reg = reg_info->invalidate_regs[0];
75 const lldb_private::RegisterInfo *full_reg_info =
76 GetRegisterInfoAtIndex(full_reg);
78 // Read the full register.
79 if (ReadRegister(full_reg_info, full_value)) {
80 lldb_private::Status error;
81 lldb::ByteOrder byte_order = GetByteOrder();
82 uint8_t dst[lldb_private::RegisterValue::kMaxRegisterByteSize];
84 // Get the bytes for the full register.
85 const uint32_t dest_size = full_value.GetAsMemoryData(
86 full_reg_info, dst, sizeof(dst), byte_order, error);
87 if (error.Success() && dest_size) {
88 uint8_t src[lldb_private::RegisterValue::kMaxRegisterByteSize];
90 // Get the bytes for the source data.
91 const uint32_t src_size = value.GetAsMemoryData(
92 reg_info, src, sizeof(src), byte_order, error);
93 if (error.Success() && src_size && (src_size < dest_size)) {
94 // Copy the src bytes to the destination.
95 ::memcpy(dst + (reg_info->byte_offset & 0x1), src, src_size);
96 // Set this full register as the value to write.
97 value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
98 value_to_write.SetType(full_reg_info);
99 reg_to_write = full_reg;
105 ProcessMonitor &monitor = GetMonitor();
106 return monitor.WriteRegisterValue(
107 m_thread.GetID(), GetRegisterOffset(reg_to_write),
108 GetRegisterName(reg_to_write), value_to_write);
111 bool RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(
112 const lldb_private::RegisterInfo *reg_info,
113 lldb_private::RegisterValue &value) {
117 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
123 uint32_t full_reg = reg;
124 bool is_subreg = reg_info->invalidate_regs &&
125 (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM);
128 // Read the full aligned 64-bit register.
129 full_reg = reg_info->invalidate_regs[0];
131 return ReadRegister(full_reg, value);
134 // Get pointer to m_fpr variable and set the data from it.
135 assert(reg_info->byte_offset < sizeof m_fpr);
136 uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset;
137 switch (reg_info->byte_size) {
139 value.SetUInt16(*(uint16_t *)src);
142 value.SetUInt32(*(uint32_t *)src);
145 value.SetUInt64(*(uint64_t *)src);
148 assert(false && "Unhandled data size.");
153 bool RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(
154 const lldb_private::RegisterInfo *reg_info,
155 const lldb_private::RegisterValue &value) {
156 const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
159 return WriteRegister(reg, value);
164 bool RegisterContextPOSIXProcessMonitor_arm64::ReadAllRegisterValues(
165 lldb::DataBufferSP &data_sp) {
166 bool success = false;
167 data_sp.reset(new lldb_private::DataBufferHeap(REG_CONTEXT_SIZE, 0));
168 if (data_sp && ReadGPR() && ReadFPR()) {
169 uint8_t *dst = data_sp->GetBytes();
173 ::memcpy(dst, &m_gpr_arm64, GetGPRSize());
175 ::memcpy(dst, &m_fpr, sizeof m_fpr);
181 bool RegisterContextPOSIXProcessMonitor_arm64::WriteAllRegisterValues(
182 const lldb::DataBufferSP &data_sp) {
183 bool success = false;
184 if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) {
185 uint8_t *src = data_sp->GetBytes();
187 ::memcpy(&m_gpr_arm64, src, GetGPRSize());
190 ::memcpy(&m_fpr, src, sizeof m_fpr);
191 success = WriteFPR();
198 uint32_t RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpoint(
199 lldb::addr_t addr, size_t size, bool read, bool write) {
200 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
203 for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) {
204 if (IsWatchpointVacant(hw_index))
205 return SetHardwareWatchpointWithIndex(addr, size, read, write, hw_index);
208 return LLDB_INVALID_INDEX32;
211 bool RegisterContextPOSIXProcessMonitor_arm64::ClearHardwareWatchpoint(
216 bool RegisterContextPOSIXProcessMonitor_arm64::HardwareSingleStep(bool enable) {
220 bool RegisterContextPOSIXProcessMonitor_arm64::UpdateAfterBreakpoint() {
221 if (GetPC() == LLDB_INVALID_ADDRESS)
227 unsigned RegisterContextPOSIXProcessMonitor_arm64::GetRegisterIndexFromOffset(
230 for (reg = 0; reg < k_num_registers_arm64; reg++) {
231 if (GetRegisterInfo()[reg].byte_offset == offset)
234 assert(reg < k_num_registers_arm64 && "Invalid register offset.");
238 bool RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointHit(
243 bool RegisterContextPOSIXProcessMonitor_arm64::ClearWatchpointHits() {
247 lldb::addr_t RegisterContextPOSIXProcessMonitor_arm64::GetWatchpointAddress(
249 return LLDB_INVALID_ADDRESS;
252 bool RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointVacant(
257 bool RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpointWithIndex(
258 lldb::addr_t addr, size_t size, bool read, bool write, uint32_t hw_index) {
263 RegisterContextPOSIXProcessMonitor_arm64::NumSupportedHardwareWatchpoints() {