1 //===-- RegisterContextPOSIXProcessMonitor_mips64.h ------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===---------------------------------------------------------------------===//
9
10 #include "lldb/Core/DataBufferHeap.h"
11 #include "lldb/Core/RegisterValue.h"
12 #include "lldb/Target/Thread.h"
13
14 #include "Plugins/Process/Utility/RegisterContextPOSIX_mips64.h"
15 #include "ProcessPOSIX.h"
16 #include "ProcessMonitor.h"
17 #include "RegisterContextPOSIXProcessMonitor_mips64.h"
18
19 using namespace lldb_private;
20 using namespace lldb;
21
22 #define REG_CONTEXT_SIZE (GetGPRSize())
23
RegisterContextPOSIXProcessMonitor_mips64(Thread & thread,uint32_t concrete_frame_idx,lldb_private::RegisterInfoInterface * register_info)24 RegisterContextPOSIXProcessMonitor_mips64::RegisterContextPOSIXProcessMonitor_mips64(Thread &thread,
25 uint32_t concrete_frame_idx,
26 lldb_private::RegisterInfoInterface *register_info)
27 : RegisterContextPOSIX_mips64(thread, concrete_frame_idx, register_info)
28 {
29 }
30
31 ProcessMonitor &
GetMonitor()32 RegisterContextPOSIXProcessMonitor_mips64::GetMonitor()
33 {
34 ProcessSP base = CalculateProcess();
35 ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get());
36 return process->GetMonitor();
37 }
38
39 bool
ReadGPR()40 RegisterContextPOSIXProcessMonitor_mips64::ReadGPR()
41 {
42 ProcessMonitor &monitor = GetMonitor();
43 return monitor.ReadGPR(m_thread.GetID(), &m_gpr_mips64, GetGPRSize());
44 }
45
46 bool
ReadFPR()47 RegisterContextPOSIXProcessMonitor_mips64::ReadFPR()
48 {
49 // XXX not yet implemented
50 return false;
51 }
52
53 bool
WriteGPR()54 RegisterContextPOSIXProcessMonitor_mips64::WriteGPR()
55 {
56 ProcessMonitor &monitor = GetMonitor();
57 return monitor.WriteGPR(m_thread.GetID(), &m_gpr_mips64, GetGPRSize());
58 }
59
60 bool
WriteFPR()61 RegisterContextPOSIXProcessMonitor_mips64::WriteFPR()
62 {
63 // XXX not yet implemented
64 return false;
65 }
66
67 bool
ReadRegister(const unsigned reg,RegisterValue & value)68 RegisterContextPOSIXProcessMonitor_mips64::ReadRegister(const unsigned reg,
69 RegisterValue &value)
70 {
71 ProcessMonitor &monitor = GetMonitor();
72 return monitor.ReadRegisterValue(m_thread.GetID(),
73 GetRegisterOffset(reg),
74 GetRegisterName(reg),
75 GetRegisterSize(reg),
76 value);
77 }
78
79 bool
WriteRegister(const unsigned reg,const RegisterValue & value)80 RegisterContextPOSIXProcessMonitor_mips64::WriteRegister(const unsigned reg,
81 const RegisterValue &value)
82 {
83 unsigned reg_to_write = reg;
84 RegisterValue value_to_write = value;
85
86 // Check if this is a subregister of a full register.
87 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
88 if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM))
89 {
90 RegisterValue full_value;
91 uint32_t full_reg = reg_info->invalidate_regs[0];
92 const RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
93
94 // Read the full register.
95 if (ReadRegister(full_reg_info, full_value))
96 {
97 Error error;
98 ByteOrder byte_order = GetByteOrder();
99 uint8_t dst[RegisterValue::kMaxRegisterByteSize];
100
101 // Get the bytes for the full register.
102 const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info,
103 dst,
104 sizeof(dst),
105 byte_order,
106 error);
107 if (error.Success() && dest_size)
108 {
109 uint8_t src[RegisterValue::kMaxRegisterByteSize];
110
111 // Get the bytes for the source data.
112 const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error);
113 if (error.Success() && src_size && (src_size < dest_size))
114 {
115 // Copy the src bytes to the destination.
116 memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size);
117 // Set this full register as the value to write.
118 value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
119 value_to_write.SetType(full_reg_info);
120 reg_to_write = full_reg;
121 }
122 }
123 }
124 }
125
126 ProcessMonitor &monitor = GetMonitor();
127 return monitor.WriteRegisterValue(m_thread.GetID(),
128 GetRegisterOffset(reg_to_write),
129 GetRegisterName(reg_to_write),
130 value_to_write);
131 }
132
133 bool
ReadRegister(const RegisterInfo * reg_info,RegisterValue & value)134 RegisterContextPOSIXProcessMonitor_mips64::ReadRegister(const RegisterInfo *reg_info, RegisterValue &value)
135 {
136 if (!reg_info)
137 return false;
138
139 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
140
141 if (IsFPR(reg))
142 {
143 if (!ReadFPR())
144 return false;
145 }
146 else
147 {
148 uint32_t full_reg = reg;
149 bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM);
150
151 if (is_subreg)
152 {
153 // Read the full aligned 64-bit register.
154 full_reg = reg_info->invalidate_regs[0];
155 }
156
157 bool success = ReadRegister(full_reg, value);
158
159 if (success)
160 {
161 // If our read was not aligned (for ah,bh,ch,dh), shift our returned value one byte to the right.
162 if (is_subreg && (reg_info->byte_offset & 0x1))
163 value.SetUInt64(value.GetAsUInt64() >> 8);
164
165 // If our return byte size was greater than the return value reg size, then
166 // use the type specified by reg_info rather than the uint64_t default
167 if (value.GetByteSize() > reg_info->byte_size)
168 value.SetType(reg_info);
169 }
170 return success;
171 }
172
173 return false;
174 }
175
176 bool
WriteRegister(const RegisterInfo * reg_info,const RegisterValue & value)177 RegisterContextPOSIXProcessMonitor_mips64::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &value)
178 {
179 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
180
181 if (IsGPR(reg))
182 return WriteRegister(reg, value);
183
184 return false;
185 }
186
187 bool
ReadAllRegisterValues(DataBufferSP & data_sp)188 RegisterContextPOSIXProcessMonitor_mips64::ReadAllRegisterValues(DataBufferSP &data_sp)
189 {
190 bool success = false;
191 data_sp.reset (new DataBufferHeap (REG_CONTEXT_SIZE, 0));
192 if (data_sp && ReadGPR () && ReadFPR ())
193 {
194 uint8_t *dst = data_sp->GetBytes();
195 success = dst != 0;
196
197 if (success)
198 {
199 ::memcpy (dst, &m_gpr_mips64, GetGPRSize());
200 }
201 }
202 return success;
203 }
204
205 bool
WriteAllRegisterValues(const DataBufferSP & data_sp)206 RegisterContextPOSIXProcessMonitor_mips64::WriteAllRegisterValues(const DataBufferSP &data_sp)
207 {
208 bool success = false;
209 if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE)
210 {
211 uint8_t *src = data_sp->GetBytes();
212 if (src)
213 {
214 ::memcpy (&m_gpr_mips64, src, GetGPRSize());
215
216 if (WriteGPR())
217 {
218 src += GetGPRSize();
219 }
220 }
221 }
222 return success;
223 }
224
225 uint32_t
SetHardwareWatchpoint(addr_t addr,size_t size,bool read,bool write)226 RegisterContextPOSIXProcessMonitor_mips64::SetHardwareWatchpoint(addr_t addr, size_t size,
227 bool read, bool write)
228 {
229 const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
230 uint32_t hw_index;
231
232 for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index)
233 {
234 if (IsWatchpointVacant(hw_index))
235 return SetHardwareWatchpointWithIndex(addr, size,
236 read, write,
237 hw_index);
238 }
239
240 return LLDB_INVALID_INDEX32;
241 }
242
243 bool
ClearHardwareWatchpoint(uint32_t hw_index)244 RegisterContextPOSIXProcessMonitor_mips64::ClearHardwareWatchpoint(uint32_t hw_index)
245 {
246 return false;
247 }
248
249 bool
HardwareSingleStep(bool enable)250 RegisterContextPOSIXProcessMonitor_mips64::HardwareSingleStep(bool enable)
251 {
252 return false;
253 }
254
255 bool
UpdateAfterBreakpoint()256 RegisterContextPOSIXProcessMonitor_mips64::UpdateAfterBreakpoint()
257 {
258 // PC points one byte past the int3 responsible for the breakpoint.
259 lldb::addr_t pc;
260
261 if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
262 return false;
263
264 SetPC(pc - 1);
265 return true;
266 }
267
268 unsigned
GetRegisterIndexFromOffset(unsigned offset)269 RegisterContextPOSIXProcessMonitor_mips64::GetRegisterIndexFromOffset(unsigned offset)
270 {
271 unsigned reg;
272 for (reg = 0; reg < k_num_registers_mips64; reg++)
273 {
274 if (GetRegisterInfo()[reg].byte_offset == offset)
275 break;
276 }
277 assert(reg < k_num_registers_mips64 && "Invalid register offset.");
278 return reg;
279 }
280
281 bool
IsWatchpointHit(uint32_t hw_index)282 RegisterContextPOSIXProcessMonitor_mips64::IsWatchpointHit(uint32_t hw_index)
283 {
284 return false;
285 }
286
287 bool
ClearWatchpointHits()288 RegisterContextPOSIXProcessMonitor_mips64::ClearWatchpointHits()
289 {
290 return false;
291 }
292
293 addr_t
GetWatchpointAddress(uint32_t hw_index)294 RegisterContextPOSIXProcessMonitor_mips64::GetWatchpointAddress(uint32_t hw_index)
295 {
296 return LLDB_INVALID_ADDRESS;
297 }
298
299 bool
IsWatchpointVacant(uint32_t hw_index)300 RegisterContextPOSIXProcessMonitor_mips64::IsWatchpointVacant(uint32_t hw_index)
301 {
302 return false;
303 }
304
305 bool
SetHardwareWatchpointWithIndex(addr_t addr,size_t size,bool read,bool write,uint32_t hw_index)306 RegisterContextPOSIXProcessMonitor_mips64::SetHardwareWatchpointWithIndex(addr_t addr, size_t size,
307 bool read, bool write,
308 uint32_t hw_index)
309 {
310 return false;
311 }
312
313 uint32_t
NumSupportedHardwareWatchpoints()314 RegisterContextPOSIXProcessMonitor_mips64::NumSupportedHardwareWatchpoints()
315 {
316 return 0;
317 }
318
319