1 //===-- RegisterContextPOSIXProcessMonitor_powerpc.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_powerpc.h"
16 #include "Plugins/Process/Utility/RegisterContextPOSIX_powerpc.h"
18 using namespace lldb_private;
21 #define REG_CONTEXT_SIZE (GetGPRSize())
23 RegisterContextPOSIXProcessMonitor_powerpc::
24 RegisterContextPOSIXProcessMonitor_powerpc(
25 Thread &thread, uint32_t concrete_frame_idx,
26 lldb_private::RegisterInfoInterface *register_info)
27 : RegisterContextPOSIX_powerpc(thread, concrete_frame_idx, register_info) {}
29 ProcessMonitor &RegisterContextPOSIXProcessMonitor_powerpc::GetMonitor() {
30 ProcessSP base = CalculateProcess();
31 ProcessFreeBSD *process = static_cast<ProcessFreeBSD *>(base.get());
32 return process->GetMonitor();
35 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadGPR() {
36 ProcessMonitor &monitor = GetMonitor();
37 return monitor.ReadGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize());
40 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadFPR() {
41 ProcessMonitor &monitor = GetMonitor();
42 return monitor.ReadFPR(m_thread.GetID(), &m_fpr_powerpc,
43 sizeof(m_fpr_powerpc));
46 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadVMX() {
47 // XXX: Need a way to read/write process VMX registers with ptrace.
51 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteGPR() {
52 ProcessMonitor &monitor = GetMonitor();
53 return monitor.WriteGPR(m_thread.GetID(), &m_gpr_powerpc, GetGPRSize());
56 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteFPR() {
57 ProcessMonitor &monitor = GetMonitor();
58 return monitor.WriteFPR(m_thread.GetID(), &m_fpr_powerpc,
59 sizeof(m_fpr_powerpc));
62 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteVMX() {
63 // XXX: Need a way to read/write process VMX registers with ptrace.
67 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(
68 const unsigned reg, RegisterValue &value) {
69 ProcessMonitor &monitor = GetMonitor();
70 return monitor.ReadRegisterValue(m_thread.GetID(), GetRegisterOffset(reg),
71 GetRegisterName(reg), GetRegisterSize(reg),
75 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(
76 const unsigned reg, const RegisterValue &value) {
77 unsigned reg_to_write = reg;
78 RegisterValue value_to_write = value;
80 // Check if this is a subregister of a full register.
81 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
82 if (reg_info->invalidate_regs &&
83 (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM)) {
84 RegisterValue full_value;
85 uint32_t full_reg = reg_info->invalidate_regs[0];
86 const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
88 // Read the full register.
89 if (ReadRegister(full_reg_info, full_value)) {
91 ByteOrder byte_order = GetByteOrder();
92 uint8_t dst[RegisterValue::kMaxRegisterByteSize];
94 // Get the bytes for the full register.
95 const uint32_t dest_size = full_value.GetAsMemoryData(
96 full_reg_info, dst, sizeof(dst), byte_order, error);
97 if (error.Success() && dest_size) {
98 uint8_t src[RegisterValue::kMaxRegisterByteSize];
100 // Get the bytes for the source data.
101 const uint32_t src_size = value.GetAsMemoryData(
102 reg_info, src, sizeof(src), byte_order, error);
103 if (error.Success() && src_size && (src_size < dest_size)) {
104 // Copy the src bytes to the destination.
105 memcpy(dst + (reg_info->byte_offset & 0x1), src, src_size);
106 // Set this full register as the value to write.
107 value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
108 value_to_write.SetType(full_reg_info);
109 reg_to_write = full_reg;
115 ProcessMonitor &monitor = GetMonitor();
116 // Account for the fact that 32-bit targets on powerpc64 really use 64-bit
117 // registers in ptrace, but expose here 32-bit registers with a higher
119 uint64_t offset = GetRegisterOffset(reg_to_write);
120 offset &= ~(sizeof(uintptr_t) - 1);
121 return monitor.WriteRegisterValue(
122 m_thread.GetID(), offset, GetRegisterName(reg_to_write), value_to_write);
125 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadRegister(
126 const RegisterInfo *reg_info, RegisterValue &value) {
130 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
135 uint8_t *src = (uint8_t *)&m_fpr_powerpc + reg_info->byte_offset;
136 value.SetUInt64(*(uint64_t *)src);
137 } else if (IsGPR(reg)) {
138 bool success = ReadRegister(reg, value);
141 // If our return byte size was greater than the return value reg size,
142 // then use the type specified by reg_info rather than the uint64_t
144 if (value.GetByteSize() > reg_info->byte_size)
145 value.SetType(reg_info);
153 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteRegister(
154 const RegisterInfo *reg_info, const RegisterValue &value) {
155 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
158 return WriteRegister(reg, value);
159 } else if (IsFPR(reg)) {
160 assert(reg_info->byte_offset < sizeof(m_fpr_powerpc));
161 uint8_t *dst = (uint8_t *)&m_fpr_powerpc + reg_info->byte_offset;
162 *(uint64_t *)dst = value.GetAsUInt64();
169 bool RegisterContextPOSIXProcessMonitor_powerpc::ReadAllRegisterValues(
170 DataBufferSP &data_sp) {
171 bool success = false;
172 data_sp.reset(new DataBufferHeap(REG_CONTEXT_SIZE, 0));
173 if (ReadGPR() && ReadFPR()) {
174 uint8_t *dst = data_sp->GetBytes();
178 ::memcpy(dst, &m_gpr_powerpc, GetGPRSize());
185 bool RegisterContextPOSIXProcessMonitor_powerpc::WriteAllRegisterValues(
186 const DataBufferSP &data_sp) {
187 bool success = false;
188 if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE) {
189 uint8_t *src = data_sp->GetBytes();
191 ::memcpy(&m_gpr_powerpc, src, GetGPRSize());
195 ::memcpy(&m_fpr_powerpc, src, sizeof(m_fpr_powerpc));
197 success = WriteFPR();
204 uint32_t RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpoint(
205 addr_t addr, size_t size, bool read, bool write) {
206 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
209 for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index) {
210 if (IsWatchpointVacant(hw_index))
211 return SetHardwareWatchpointWithIndex(addr, size, read, write, hw_index);
214 return LLDB_INVALID_INDEX32;
217 bool RegisterContextPOSIXProcessMonitor_powerpc::ClearHardwareWatchpoint(
222 bool RegisterContextPOSIXProcessMonitor_powerpc::HardwareSingleStep(
227 bool RegisterContextPOSIXProcessMonitor_powerpc::UpdateAfterBreakpoint() {
230 if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
236 unsigned RegisterContextPOSIXProcessMonitor_powerpc::GetRegisterIndexFromOffset(
239 for (reg = 0; reg < k_num_registers_powerpc; reg++) {
240 if (GetRegisterInfo()[reg].byte_offset == offset)
243 assert(reg < k_num_registers_powerpc && "Invalid register offset.");
247 bool RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointHit(
252 bool RegisterContextPOSIXProcessMonitor_powerpc::ClearWatchpointHits() {
256 addr_t RegisterContextPOSIXProcessMonitor_powerpc::GetWatchpointAddress(
258 return LLDB_INVALID_ADDRESS;
261 bool RegisterContextPOSIXProcessMonitor_powerpc::IsWatchpointVacant(
266 bool RegisterContextPOSIXProcessMonitor_powerpc::SetHardwareWatchpointWithIndex(
267 addr_t addr, size_t size, bool read, bool write, uint32_t hw_index) {
272 RegisterContextPOSIXProcessMonitor_powerpc::NumSupportedHardwareWatchpoints() {