src/arch/riscv/remote_gdb.cc

   1 /*
   2  * Copyright (c) 2021 Huawei International
   3  * Copyright 2015 LabWare
   4  * Copyright 2014 Google, Inc.
   5  * Copyright (c) 2010 ARM Limited
   6  * Copyright (c) 2020 Barkhausen Institut
   7  * All rights reserved
   8  *
   9  * The license below extends only to copyright in the software and shall
  10  * not be construed as granting a license to any other intellectual
  11  * property including but not limited to intellectual property relating
  12  * to a hardware implementation of the functionality of the software
  13  * licensed hereunder.  You may use the software subject to the license
  14  * terms below provided that you ensure that this notice is replicated
  15  * unmodified and in its entirety in all distributions of the software,
  16  * modified or unmodified, in source code or in binary form.
  17  *
  18  * Copyright (c) 2017 The University of Virginia
  19  * Copyright (c) 2002-2005 The Regents of The University of Michigan
  20  * All rights reserved.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions are
  24  * met: redistributions of source code must retain the above copyright
  25  * notice, this list of conditions and the following disclaimer;
  26  * redistributions in binary form must reproduce the above copyright
  27  * notice, this list of conditions and the following disclaimer in the
  28  * documentation and/or other materials provided with the distribution;
  29  * neither the name of the copyright holders nor the names of its
  30  * contributors may be used to endorse or promote products derived from
  31  * this software without specific prior written permission.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  34  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  35  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  36  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  37  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  38  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  39  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  40  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  41  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  43  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46 /*
  47  * Copyright (c) 1990, 1993 The Regents of the University of California
  48  * All rights reserved
  49  *
  50  * This software was developed by the Computer Systems Engineering group
  51  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  52  * contributed to Berkeley.
  53  *
  54  * All advertising materials mentioning features or use of this software
  55  * must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Lawrence Berkeley Laboratories.
  58  *
  59  * Redistribution and use in source and binary forms, with or without
  60  * modification, are permitted provided that the following conditions
  61  * are met:
  62  * 1. Redistributions of source code must retain the above copyright
  63  *    notice, this list of conditions and the following disclaimer.
  64  * 2. Redistributions in binary form must reproduce the above copyright
  65  *    notice, this list of conditions and the following disclaimer in the
  66  *    documentation and/or other materials provided with the distribution.
  67  * 3. All advertising materials mentioning features or use of this software
  68  *    must display the following acknowledgement:
  69  *      This product includes software developed by the University of
  70  *      California, Berkeley and its contributors.
  71  * 4. Neither the name of the University nor the names of its contributors
  72  *    may be used to endorse or promote products derived from this software
  73  *    without specific prior written permission.
  74  *
  75  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  76  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  77  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  78  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  79  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  80  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  81  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  82  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  83  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  84  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  85  * SUCH DAMAGE.
  86  *
  87  *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
  88  */
  89
  90 /*-
  91  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  92  * All rights reserved.
  93  *
  94  * This code is derived from software contributed to The NetBSD Foundation
  95  * by Jason R. Thorpe.
  96  *
  97  * Redistribution and use in source and binary forms, with or without
  98  * modification, are permitted provided that the following conditions
  99  * are met:
 100  * 1. Redistributions of source code must retain the above copyright
 101  *    notice, this list of conditions and the following disclaimer.
 102  * 2. Redistributions in binary form must reproduce the above copyright
 103  *    notice, this list of conditions and the following disclaimer in the
 104  *    documentation and/or other materials provided with the distribution.
 105  * 3. All advertising materials mentioning features or use of this software
 106  *    must display the following acknowledgement:
 107  *      This product includes software developed by the NetBSD
 108  *      Foundation, Inc. and its contributors.
 109  * 4. Neither the name of The NetBSD Foundation nor the names of its
 110  *    contributors may be used to endorse or promote products derived
 111  *    from this software without specific prior written permission.
 112  *
 113  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 114  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 115  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 116  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 117  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 118  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 119  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 120  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 121  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 122  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 123  * POSSIBILITY OF SUCH DAMAGE.
 124  */
 125
 126 /*
 127  * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
 128  *
 129  * Taken from NetBSD
 130  *
 131  * "Stub" to allow remote cpu to debug over a serial line using gdb.
 132  */
 133
 134 #include "arch/riscv/remote_gdb.hh"
 135
 136 #include <string>
 137
 138 #include "arch/riscv/mmu.hh"
 139 #include "arch/riscv/pagetable_walker.hh"
 140 #include "arch/riscv/registers.hh"
 141 #include "arch/riscv/tlb.hh"
 142 #include "blobs/gdb_xml_riscv_cpu.hh"
 143 #include "blobs/gdb_xml_riscv_csr.hh"
 144 #include "blobs/gdb_xml_riscv_fpu.hh"
 145 #include "blobs/gdb_xml_riscv_target.hh"
 146 #include "cpu/thread_state.hh"
 147 #include "debug/GDBAcc.hh"
 148 #include "mem/page_table.hh"
 149 #include "sim/full_system.hh"
 150
 151 using namespace std;
 152 using namespace RiscvISA;
 153
 154 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
 155     : BaseRemoteGDB(_system, tc, _port), regCache(this)
 156 {
 157 }
 158
 159 bool
 160 RemoteGDB::acc(Addr va, size_t len)
 161 {
 162     if (FullSystem)
 163     {
 164         MMU *mmu = static_cast<MMU *>(context()->getMMUPtr());
 165         unsigned logBytes;
 166         Addr paddr = va;
 167
 168         PrivilegeMode pmode = mmu->getMemPriv(context(), BaseTLB::Read);
 169         SATP satp = context()->readMiscReg(MISCREG_SATP);
 170         if (pmode != PrivilegeMode::PRV_M &&
 171             satp.mode != AddrXlateMode::BARE) {
 172             Walker *walker = mmu->getDataWalker();
 173             Fault fault = walker->startFunctional(
 174                 context(), paddr, logBytes, BaseTLB::Read);
 175             if (fault != NoFault)
 176                 return false;
 177         }
 178         return true;
 179     }
 180
 181     return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
 182 }
 183
 184 void
 185 RemoteGDB::RiscvGdbRegCache::getRegs(ThreadContext *context)
 186 {
 187     DPRINTF(GDBAcc, "getregs in remotegdb, size %lu\n", size());
 188
 189     // General registers
 190     for (int i = 0; i < NumIntArchRegs; i++)
 191     {
 192         r.gpr[i] = context->readIntReg(i);
 193     }
 194     r.pc = context->pcState().pc();
 195
 196     // Floating point registers
 197     for (int i = 0; i < NumFloatRegs; i++)
 198         r.fpu[i] = context->readFloatReg(i);
 199     r.fflags = context->readMiscRegNoEffect(
 200         CSRData.at(CSR_FFLAGS).physIndex) & CSRMasks.at(CSR_FFLAGS);
 201     r.frm = context->readMiscRegNoEffect(
 202         CSRData.at(CSR_FRM).physIndex) & CSRMasks.at(CSR_FRM);
 203     r.fcsr = context->readMiscRegNoEffect(
 204         CSRData.at(CSR_FCSR).physIndex) & CSRMasks.at(CSR_FCSR);
 205
 206     // CSR registers
 207     r.cycle = context->readMiscRegNoEffect(
 208         CSRData.at(CSR_CYCLE).physIndex);
 209     r.time = context->readMiscRegNoEffect(
 210         CSRData.at(CSR_TIME).physIndex);
 211
 212     // U mode CSR
 213     r.ustatus = context->readMiscRegNoEffect(
 214         CSRData.at(CSR_USTATUS).physIndex) & CSRMasks.at(CSR_USTATUS);
 215     r.uie = context->readMiscRegNoEffect(
 216         CSRData.at(CSR_UIE).physIndex) & CSRMasks.at(CSR_UIE);
 217     r.utvec = context->readMiscRegNoEffect(
 218         CSRData.at(CSR_UTVEC).physIndex);
 219     r.uscratch = context->readMiscRegNoEffect(
 220         CSRData.at(CSR_USCRATCH).physIndex);
 221     r.uepc = context->readMiscRegNoEffect(
 222         CSRData.at(CSR_UEPC).physIndex);
 223     r.ucause = context->readMiscRegNoEffect(
 224         CSRData.at(CSR_UCAUSE).physIndex);
 225     r.utval = context->readMiscRegNoEffect(
 226         CSRData.at(CSR_UTVAL).physIndex);
 227     r.uip = context->readMiscRegNoEffect(
 228         CSRData.at(CSR_UIP).physIndex) & CSRMasks.at(CSR_UIP);
 229
 230     // S mode CSR
 231     r.sstatus = context->readMiscRegNoEffect(
 232         CSRData.at(CSR_SSTATUS).physIndex) & CSRMasks.at(CSR_SSTATUS);
 233     r.sedeleg = context->readMiscRegNoEffect(
 234         CSRData.at(CSR_SEDELEG).physIndex);
 235     r.sideleg = context->readMiscRegNoEffect(
 236         CSRData.at(CSR_SIDELEG).physIndex);
 237     r.sie = context->readMiscRegNoEffect(
 238         CSRData.at(CSR_SIE).physIndex) & CSRMasks.at(CSR_SIE);
 239     r.stvec = context->readMiscRegNoEffect(
 240         CSRData.at(CSR_STVEC).physIndex);
 241     r.scounteren = context->readMiscRegNoEffect(
 242         CSRData.at(CSR_SCOUNTEREN).physIndex);
 243     r.sscratch = context->readMiscRegNoEffect(
 244         CSRData.at(CSR_SSCRATCH).physIndex);
 245     r.sepc = context->readMiscRegNoEffect(
 246         CSRData.at(CSR_SEPC).physIndex);
 247     r.scause = context->readMiscRegNoEffect(
 248         CSRData.at(CSR_SCAUSE).physIndex);
 249     r.stval = context->readMiscRegNoEffect(
 250         CSRData.at(CSR_STVAL).physIndex);
 251     r.sip = context->readMiscRegNoEffect(
 252         CSRData.at(CSR_SIP).physIndex) & CSRMasks.at(CSR_SIP);
 253     r.satp = context->readMiscRegNoEffect(
 254         CSRData.at(CSR_SATP).physIndex);
 255
 256     // M mode CSR
 257     r.mvendorid = context->readMiscRegNoEffect(
 258         CSRData.at(CSR_MVENDORID).physIndex);
 259     r.marchid = context->readMiscRegNoEffect(
 260         CSRData.at(CSR_MARCHID).physIndex);
 261     r.mimpid = context->readMiscRegNoEffect(
 262         CSRData.at(CSR_MIMPID).physIndex);
 263     r.mhartid = context->readMiscRegNoEffect(
 264         CSRData.at(CSR_MHARTID).physIndex);
 265     r.mstatus = context->readMiscRegNoEffect(
 266         CSRData.at(CSR_MSTATUS).physIndex) & CSRMasks.at(CSR_MSTATUS);
 267     r.misa = context->readMiscRegNoEffect(
 268         CSRData.at(CSR_MISA).physIndex) & CSRMasks.at(CSR_MISA);
 269     r.medeleg = context->readMiscRegNoEffect(
 270         CSRData.at(CSR_MEDELEG).physIndex);
 271     r.mideleg = context->readMiscRegNoEffect(
 272         CSRData.at(CSR_MIDELEG).physIndex);
 273     r.mie = context->readMiscRegNoEffect(
 274         CSRData.at(CSR_MIE).physIndex) & CSRMasks.at(CSR_MIE);
 275     r.mtvec = context->readMiscRegNoEffect(
 276         CSRData.at(CSR_MTVEC).physIndex);
 277     r.mcounteren = context->readMiscRegNoEffect(
 278         CSRData.at(CSR_MCOUNTEREN).physIndex);
 279     r.mscratch = context->readMiscRegNoEffect(
 280         CSRData.at(CSR_MSCRATCH).physIndex);
 281     r.mepc = context->readMiscRegNoEffect(
 282         CSRData.at(CSR_MEPC).physIndex);
 283     r.mcause = context->readMiscRegNoEffect(
 284         CSRData.at(CSR_MCAUSE).physIndex);
 285     r.mtval = context->readMiscRegNoEffect(
 286         CSRData.at(CSR_MTVAL).physIndex);
 287     r.mip = context->readMiscRegNoEffect(
 288         CSRData.at(CSR_MIP).physIndex) & CSRMasks.at(CSR_MIP);
 289
 290     // H mode CSR (to be implemented)
 291 }
 292
 293 void
 294 RemoteGDB::RiscvGdbRegCache::setRegs(ThreadContext *context) const
 295 {
 296     // NOTE: no error will be reported for attempting to set masked bits.
 297     RegVal oldVal;
 298     int mask;
 299     RegVal newVal;
 300
 301     DPRINTF(GDBAcc, "setregs in remotegdb \n");
 302     for (int i = 0; i < NumIntArchRegs; i++)
 303         context->setIntReg(i, r.gpr[i]);
 304     context->pcState(r.pc);
 305
 306     // Floating point registers
 307     for (int i = 0; i < NumFloatRegs; i++)
 308         context->setFloatReg(i, r.fpu[i]);
 309
 310     oldVal = context->readMiscRegNoEffect(
 311         CSRData.at(CSR_FFLAGS).physIndex);
 312     mask = CSRMasks.at(CSR_FFLAGS);
 313     newVal = (oldVal & ~mask) | (r.fflags & mask);
 314     context->setMiscRegNoEffect(
 315         CSRData.at(CSR_FFLAGS).physIndex, newVal);
 316
 317     oldVal = context->readMiscRegNoEffect(
 318         CSRData.at(CSR_FRM).physIndex);
 319     mask = CSRMasks.at(CSR_FRM);
 320     newVal = (oldVal & ~mask) | (r.frm & mask);
 321     context->setMiscRegNoEffect(
 322         CSRData.at(CSR_FRM).physIndex, newVal);
 323
 324     oldVal = context->readMiscRegNoEffect(
 325         CSRData.at(CSR_FCSR).physIndex);
 326     mask = CSRMasks.at(CSR_FCSR);
 327     newVal = (oldVal & ~mask) | (r.fcsr & mask);
 328     context->setMiscRegNoEffect(
 329         CSRData.at(CSR_FCSR).physIndex, newVal);
 330
 331     // CSR registers
 332     context->setMiscRegNoEffect(
 333         CSRData.at(CSR_CYCLE).physIndex, r.cycle);
 334     context->setMiscRegNoEffect(
 335         CSRData.at(CSR_TIME).physIndex, r.time);
 336
 337     // U mode CSR
 338     oldVal = context->readMiscRegNoEffect(
 339         CSRData.at(CSR_USTATUS).physIndex);
 340     mask = CSRMasks.at(CSR_USTATUS);
 341     newVal = (oldVal & ~mask) | (r.ustatus & mask);
 342     context->setMiscRegNoEffect(
 343         CSRData.at(CSR_USTATUS).physIndex, newVal);
 344     oldVal = context->readMiscRegNoEffect(
 345         CSRData.at(CSR_UIE).physIndex);
 346     mask = CSRMasks.at(CSR_UIE);
 347     newVal = (oldVal & ~mask) | (r.uie & mask);
 348     context->setMiscRegNoEffect(
 349         CSRData.at(CSR_UIE).physIndex, newVal);
 350     context->setMiscRegNoEffect(
 351         CSRData.at(CSR_UTVEC).physIndex, r.utvec);
 352     context->setMiscRegNoEffect(
 353         CSRData.at(CSR_USCRATCH).physIndex, r.uscratch);
 354     context->setMiscRegNoEffect(
 355         CSRData.at(CSR_UEPC).physIndex, r.uepc);
 356     context->setMiscRegNoEffect(
 357         CSRData.at(CSR_UCAUSE).physIndex, r.ucause);
 358     context->setMiscRegNoEffect(
 359         CSRData.at(CSR_UTVAL).physIndex, r.utval);
 360     oldVal = context->readMiscRegNoEffect(
 361         CSRData.at(CSR_UIP).physIndex);
 362     mask = CSRMasks.at(CSR_UIP);
 363     newVal = (oldVal & ~mask) | (r.uip & mask);
 364     context->setMiscRegNoEffect(
 365         CSRData.at(CSR_UIP).physIndex, newVal);
 366
 367     // S mode CSR
 368     oldVal = context->readMiscRegNoEffect(
 369         CSRData.at(CSR_SSTATUS).physIndex);
 370     mask = CSRMasks.at(CSR_SSTATUS);
 371     newVal = (oldVal & ~mask) | (r.sstatus & mask);
 372     context->setMiscRegNoEffect(
 373         CSRData.at(CSR_SSTATUS).physIndex, newVal);
 374     context->setMiscRegNoEffect(
 375         CSRData.at(CSR_SEDELEG).physIndex, r.sedeleg);
 376     context->setMiscRegNoEffect(
 377         CSRData.at(CSR_SIDELEG).physIndex, r.sideleg);
 378     oldVal = context->readMiscRegNoEffect(
 379         CSRData.at(CSR_SIE).physIndex);
 380     mask = CSRMasks.at(CSR_SIE);
 381     newVal = (oldVal & ~mask) | (r.sie & mask);
 382     context->setMiscRegNoEffect(
 383         CSRData.at(CSR_SIE).physIndex, newVal);
 384     context->setMiscRegNoEffect(
 385         CSRData.at(CSR_STVEC).physIndex, r.stvec);
 386     context->setMiscRegNoEffect(
 387         CSRData.at(CSR_SCOUNTEREN).physIndex, r.scounteren);
 388     context->setMiscRegNoEffect(
 389         CSRData.at(CSR_SSCRATCH).physIndex, r.sscratch);
 390     context->setMiscRegNoEffect(
 391         CSRData.at(CSR_SEPC).physIndex, r.sepc);
 392     context->setMiscRegNoEffect(
 393         CSRData.at(CSR_SCAUSE).physIndex, r.scause);
 394     context->setMiscRegNoEffect(
 395         CSRData.at(CSR_STVAL).physIndex, r.stval);
 396     oldVal = context->readMiscRegNoEffect(
 397         CSRData.at(CSR_SIP).physIndex);
 398     mask = CSRMasks.at(CSR_SIP);
 399     newVal = (oldVal & ~mask) | (r.sip & mask);
 400     context->setMiscRegNoEffect(
 401         CSRData.at(CSR_SIP).physIndex, newVal);
 402     context->setMiscRegNoEffect(
 403         CSRData.at(CSR_SATP).physIndex, r.satp);
 404
 405     // M mode CSR
 406     context->setMiscRegNoEffect(
 407         CSRData.at(CSR_MVENDORID).physIndex, r.mvendorid);
 408     context->setMiscRegNoEffect(
 409         CSRData.at(CSR_MARCHID).physIndex, r.marchid);
 410     context->setMiscRegNoEffect(
 411         CSRData.at(CSR_MIMPID).physIndex, r.mimpid);
 412     context->setMiscRegNoEffect(
 413         CSRData.at(CSR_MHARTID).physIndex, r.mhartid);
 414     oldVal = context->readMiscRegNoEffect(
 415         CSRData.at(CSR_MSTATUS).physIndex);
 416     mask = CSRMasks.at(CSR_MSTATUS);
 417     newVal = (oldVal & ~mask) | (r.mstatus & mask);
 418     context->setMiscRegNoEffect(
 419         CSRData.at(CSR_MSTATUS).physIndex, newVal);
 420     oldVal = context->readMiscRegNoEffect(
 421         CSRData.at(CSR_MISA).physIndex);
 422     mask = CSRMasks.at(CSR_MISA);
 423     newVal = (oldVal & ~mask) | (r.misa & mask);
 424     context->setMiscRegNoEffect(
 425         CSRData.at(CSR_MISA).physIndex, newVal);
 426     context->setMiscRegNoEffect(
 427         CSRData.at(CSR_MEDELEG).physIndex, r.medeleg);
 428     context->setMiscRegNoEffect(
 429         CSRData.at(CSR_MIDELEG).physIndex, r.mideleg);
 430     oldVal = context->readMiscRegNoEffect(
 431         CSRData.at(CSR_MIE).physIndex);
 432     mask = CSRMasks.at(CSR_MIE);
 433     newVal = (oldVal & ~mask) | (r.mie & mask);
 434     context->setMiscRegNoEffect(
 435         CSRData.at(CSR_MIE).physIndex, newVal);
 436     context->setMiscRegNoEffect(
 437         CSRData.at(CSR_MTVEC).physIndex, r.mtvec);
 438     context->setMiscRegNoEffect(
 439         CSRData.at(CSR_MCOUNTEREN).physIndex, r.mcounteren);
 440     context->setMiscRegNoEffect(
 441         CSRData.at(CSR_MSCRATCH).physIndex, r.mscratch);
 442     context->setMiscRegNoEffect(
 443         CSRData.at(CSR_MEPC).physIndex, r.mepc);
 444     context->setMiscRegNoEffect(
 445         CSRData.at(CSR_MCAUSE).physIndex, r.mcause);
 446     context->setMiscRegNoEffect(
 447         CSRData.at(CSR_MTVAL).physIndex, r.mtval);
 448     oldVal = context->readMiscRegNoEffect(
 449         CSRData.at(CSR_MIP).physIndex);
 450     mask = CSRMasks.at(CSR_MIP);
 451     newVal = (oldVal & ~mask) | (r.mip & mask);
 452     context->setMiscRegNoEffect(
 453         CSRData.at(CSR_MIP).physIndex, newVal);
 454
 455     // H mode CSR (to be implemented)
 456 }
 457
 458 bool
 459 RemoteGDB::getXferFeaturesRead(const std::string &annex, std::string &output)
 460 {
 461     /**
 462      * Blobs e.g. gdb_xml_riscv_target are generated by adding
 463      * GdbXml(<xml_file_name>, <blob_name>) to src/arch/riscv/Sconscript.
 464      *
 465      * Import using #include blobs/<blob_name>.hh
 466      */
 467 #define GDB_XML(x, s)                                            \
 468     {                                                            \
 469         x, std::string(reinterpret_cast<const char *>(Blobs::s), \
 470                        Blobs::s##_len)                           \
 471     }
 472     static const std::map<std::string, std::string> annexMap{
 473         GDB_XML("target.xml", gdb_xml_riscv_target),
 474         GDB_XML("riscv-64bit-cpu.xml", gdb_xml_riscv_cpu),
 475         GDB_XML("riscv-64bit-fpu.xml", gdb_xml_riscv_fpu),
 476         GDB_XML("riscv-64bit-csr.xml", gdb_xml_riscv_csr)};
 477 #undef GDB_XML
 478     auto it = annexMap.find(annex);
 479     if (it == annexMap.end())
 480         return false;
 481     output = it->second;
 482     return true;
 483 }
 484
 485 BaseGdbRegCache *
 486 RemoteGDB::gdbRegs()
 487 {
 488     return &regCache;
 489 }