remote_gdb.cc (11176:741b3059946e) remote_gdb.cc (11274:d9a0136ab8cc)
1/*
1/*
2 * Copyright 2015 LabWare
2 * Copyright 2014 Google, Inc.
3 * Copyright (c) 2010 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software

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144#include "debug/GDBAcc.hh"
145#include "debug/GDBMisc.hh"
146#include "sim/byteswap.hh"
147
148using namespace std;
149using namespace PowerISA;
150
151RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
3 * Copyright 2014 Google, Inc.
4 * Copyright (c) 2010 ARM Limited
5 * All rights reserved
6 *
7 * The license below extends only to copyright in the software and shall
8 * not be construed as granting a license to any other intellectual
9 * property including but not limited to intellectual property relating
10 * to a hardware implementation of the functionality of the software

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145#include "debug/GDBAcc.hh"
146#include "debug/GDBMisc.hh"
147#include "sim/byteswap.hh"
148
149using namespace std;
150using namespace PowerISA;
151
152RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
152 : BaseRemoteGDB(_system, tc, GDB_REG_BYTES)
153 : BaseRemoteGDB(_system, tc)
153{
154}
155
156/*
157 * Determine if the mapping at va..(va+len) is valid.
158 */
159bool
160RemoteGDB::acc(Addr va, size_t len)

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166 //port proxy to read/writeBlob. I (bgs) am not convinced the first byte
167 //check is enough.
168 if (FullSystem)
169 panic("acc not implemented for POWER FS!");
170 else
171 return context->getProcessPtr()->pTable->lookup(va, entry);
172}
173
154{
155}
156
157/*
158 * Determine if the mapping at va..(va+len) is valid.
159 */
160bool
161RemoteGDB::acc(Addr va, size_t len)

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167 //port proxy to read/writeBlob. I (bgs) am not convinced the first byte
168 //check is enough.
169 if (FullSystem)
170 panic("acc not implemented for POWER FS!");
171 else
172 return context->getProcessPtr()->pTable->lookup(va, entry);
173}
174
174/*
175 * Translate the kernel debugger register format into the GDB register
176 * format.
177 *
178 * The PowerPC ISA is quite flexible in what register sets may be present
179 * depending on the features implemented by the particular CPU;
180 * GDB addresses this by describing the format of how register contents
181 * are transferred on the wire, in XML files such as 'power-core.xml'.
182 * Ideally, we should be reading these files instead of hardcoding this
183 * information, but for now the following implementation is enough to
184 * serve as the RSP backend for the out-of-the-box, default GDB.
185 */
186void
175void
187RemoteGDB::getregs()
176RemoteGDB::PowerGdbRegCache::getRegs(ThreadContext *context)
188{
177{
189 DPRINTF(GDBAcc, "getregs in remotegdb \n");
190 memset(gdbregs.regs, 0, gdbregs.bytes());
178 DPRINTF(GDBAcc, "getRegs in remotegdb \n");
191
192 // Default order on 32-bit PowerPC:
193 // R0-R31 (32-bit each), F0-F31 (64-bit IEEE754 double),
194 // PC, MSR, CR, LR, CTR, XER (32-bit each)
195
179
180 // Default order on 32-bit PowerPC:
181 // R0-R31 (32-bit each), F0-F31 (64-bit IEEE754 double),
182 // PC, MSR, CR, LR, CTR, XER (32-bit each)
183
196 // INTREG: R0~R31
197 for (int i = 0; i < NumIntArchRegs; i++)
184 for (int i = 0; i < NumIntArchRegs; i++)
198 gdbregs.regs32[GdbFirstGPRIndex + i] = htobe((uint32_t)context->readIntReg(i));
185 r.gpr[i] = htobe((uint32_t)context->readIntReg(i));
199
186
200 // FLOATREG: F0~F31
201 for (int i = 0; i < NumFloatArchRegs; i++)
187 for (int i = 0; i < NumFloatArchRegs; i++)
202 gdbregs.regs32[GdbFirstFPRIndex + i] = context->readFloatRegBits(i);
188 r.fpr[i] = context->readFloatRegBits(i);
203
189
204 // PC, MSR, CR, LR, CTR, XER
205 gdbregs.regs32[GdbPCIndex] = htobe((uint32_t)context->pcState().pc());
206 gdbregs.regs32[GdbMSRIndex] = 0; // Is MSR modeled?
207 gdbregs.regs32[GdbCRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CR));
208 gdbregs.regs32[GdbLRIndex] = htobe((uint32_t)context->readIntReg(INTREG_LR));
209 gdbregs.regs32[GdbCTRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CTR));
210 gdbregs.regs32[GdbXERIndex] = htobe((uint32_t)context->readIntReg(INTREG_XER));
190 r.pc = htobe((uint32_t)context->pcState().pc());
191 r.msr = 0; // Is MSR modeled?
192 r.cr = htobe((uint32_t)context->readIntReg(INTREG_CR));
193 r.lr = htobe((uint32_t)context->readIntReg(INTREG_LR));
194 r.ctr = htobe((uint32_t)context->readIntReg(INTREG_CTR));
195 r.xer = htobe((uint32_t)context->readIntReg(INTREG_XER));
211}
212
196}
197
213/*
214 * Translate the GDB register format into the kernel debugger register
215 * format.
216 */
217void
198void
218RemoteGDB::setregs()
199RemoteGDB::PowerGdbRegCache::setRegs(ThreadContext *context) const
219{
200{
220 DPRINTF(GDBAcc, "setregs in remotegdb \n");
201 DPRINTF(GDBAcc, "setRegs in remotegdb \n");
221
202
222 // INTREG: R0~R31
223 for (int i = 0; i < NumIntArchRegs; i++)
203 for (int i = 0; i < NumIntArchRegs; i++)
224 context->setIntReg(i, betoh(gdbregs.regs32[GdbFirstGPRIndex + i]));
204 context->setIntReg(i, betoh(r.gpr[i]));
225
205
226 // FLOATREG: F0~F31
227 for (int i = 0; i < NumFloatArchRegs; i++)
206 for (int i = 0; i < NumFloatArchRegs; i++)
228 context->setFloatRegBits(i, gdbregs.regs64[GdbFirstFPRIndex + i]);
207 context->setFloatRegBits(i, r.fpr[i]);
229
208
230 // PC, MSR, CR, LR, CTR, XER
231 context->pcState(betoh(gdbregs.regs32[GdbPCIndex]));
209 context->pcState(betoh(r.pc));
232 // Is MSR modeled?
210 // Is MSR modeled?
233 context->setIntReg(INTREG_CR, betoh(gdbregs.regs32[GdbCRIndex]));
234 context->setIntReg(INTREG_LR, betoh(gdbregs.regs32[GdbLRIndex]));
235 context->setIntReg(INTREG_CTR, betoh(gdbregs.regs32[GdbCTRIndex]));
236 context->setIntReg(INTREG_XER, betoh(gdbregs.regs32[GdbXERIndex]));
211 context->setIntReg(INTREG_CR, betoh(r.cr));
212 context->setIntReg(INTREG_LR, betoh(r.lr));
213 context->setIntReg(INTREG_CTR, betoh(r.ctr));
214 context->setIntReg(INTREG_XER, betoh(r.xer));
237}
215}
216
217RemoteGDB::BaseGdbRegCache*
218RemoteGDB::gdbRegs() {
219 return new PowerGdbRegCache(this);
220}
221