diff options
| -rw-r--r-- | src/arch/SConscript | 1 | ||||
| -rw-r--r-- | src/arch/alpha/SConscript | 1 | ||||
| -rw-r--r-- | src/arch/alpha/ev5.cc | 2 | ||||
| -rw-r--r-- | src/arch/alpha/remote_gdb.cc | 424 | ||||
| -rw-r--r-- | src/arch/alpha/remote_gdb.hh | 130 | ||||
| -rw-r--r-- | src/arch/alpha/system.cc | 2 | ||||
| -rw-r--r-- | src/arch/sparc/remote_gdb.cc | 456 | ||||
| -rw-r--r-- | src/arch/sparc/remote_gdb.hh | 129 | ||||
| -rw-r--r-- | src/base/remote_gdb.cc | 461 | ||||
| -rw-r--r-- | src/base/remote_gdb.hh | 125 | ||||
| -rw-r--r-- | src/cpu/o3/fetch_impl.hh | 1 | ||||
| -rw-r--r-- | src/sim/system.cc | 2 | ||||
| -rw-r--r-- | src/sim/system.hh | 7 |
13 files changed, 1368 insertions, 373 deletions
diff --git a/src/arch/SConscript b/src/arch/SConscript index 092fad225..2ef3d5ee0 100644 --- a/src/arch/SConscript +++ b/src/arch/SConscript @@ -54,6 +54,7 @@ isa_switch_hdrs = Split(''' locked_mem.hh process.hh regfile.hh + remote_gdb.hh stacktrace.hh syscallreturn.hh tlb.hh diff --git a/src/arch/alpha/SConscript b/src/arch/alpha/SConscript index 9a5680649..2d733d73b 100644 --- a/src/arch/alpha/SConscript +++ b/src/arch/alpha/SConscript @@ -60,6 +60,7 @@ full_system_sources = Split(''' osfpal.cc stacktrace.cc vtophys.cc + remote_gdb.cc system.cc freebsd/system.cc linux/system.cc diff --git a/src/arch/alpha/ev5.cc b/src/arch/alpha/ev5.cc index dca948bbd..6f8f255b4 100644 --- a/src/arch/alpha/ev5.cc +++ b/src/arch/alpha/ev5.cc @@ -33,7 +33,7 @@ #include "arch/alpha/isa_traits.hh" #include "arch/alpha/osfpal.hh" #include "arch/alpha/tlb.hh" -#include "base/kgdb.h" +#include "arch/alpha/kgdb.h" #include "base/remote_gdb.hh" #include "base/stats/events.hh" #include "config/full_system.hh" diff --git a/src/arch/alpha/remote_gdb.cc b/src/arch/alpha/remote_gdb.cc new file mode 100644 index 000000000..96c7ea6e2 --- /dev/null +++ b/src/arch/alpha/remote_gdb.cc @@ -0,0 +1,424 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Nathan Binkert + */ + +/* + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Lawrence Berkeley Laboratories. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 + */ + +/*- + * Copyright (c) 2001 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ + * + * Taken from NetBSD + * + * "Stub" to allow remote cpu to debug over a serial line using gdb. + */ + +#include <sys/signal.h> + +#include <string> +#include <unistd.h> + +#include "arch/vtophys.hh" +#include "arch/alpha/remote_gdb.hh" +#include "base/intmath.hh" +#include "base/remote_gdb.hh" +#include "base/socket.hh" +#include "base/trace.hh" +#include "config/full_system.hh" +#include "cpu/thread_context.hh" +#include "cpu/static_inst.hh" +#include "mem/physical.hh" +#include "mem/port.hh" +#include "sim/system.hh" + +using namespace std; +using namespace AlphaISA; + +RemoteGDB::Event::Event(RemoteGDB *g, int fd, int e) + : PollEvent(fd, e), gdb(g) +{} + +void +RemoteGDB::Event::process(int revent) +{ + if (revent & POLLIN) + gdb->trap(ALPHA_KENTRY_IF); + else if (revent & POLLNVAL) + gdb->detach(); +} + +RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) + : BaseRemoteGDB(_system, c, KGDB_NUMREGS), + event(NULL) +{} + +RemoteGDB::~RemoteGDB() +{ + if (event) + delete event; +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::acc +// +// Determine if the mapping at va..(va+len) is valid. +// +bool +RemoteGDB::acc(Addr va, size_t len) +{ + Addr last_va; + + va = TheISA::TruncPage(va); + last_va = TheISA::RoundPage(va + len); + + do { + if (TheISA::IsK0Seg(va)) { + if (va < (TheISA::K0SegBase + pmem->size())) { + DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " + "%#x < K0SEG + size\n", va); + return true; + } else { + DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n", + va); + return false; + } + } + + /** + * This code says that all accesses to palcode (instruction and data) + * are valid since there isn't a va->pa mapping because palcode is + * accessed physically. At some point this should probably be cleaned up + * but there is no easy way to do it. + */ + + if (AlphaISA::PcPAL(va) || va < 0x10000) + return true; + + Addr ptbr = context->readMiscReg(AlphaISA::IPR_PALtemp20); + TheISA::PageTableEntry pte = TheISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va); + if (!pte.valid()) { + DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); + return false; + } + va += TheISA::PageBytes; + } while (va < last_va); + + DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); + return true; +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::getregs +// +// Translate the kernel debugger register format into +// the GDB register format. +void +RemoteGDB::getregs() +{ + memset(gdbregs.regs, 0, gdbregs.size); + + gdbregs.regs[KGDB_REG_PC] = context->readPC(); + + // @todo: Currently this is very Alpha specific. + if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + gdbregs.regs[i] = context->readIntReg(AlphaISA::reg_redir[i]); + } + } else { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + gdbregs.regs[i] = context->readIntReg(i); + } + } + +#ifdef KGDB_FP_REGS + for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { + gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i); + } +#endif +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::setregs +// +// Translate the GDB register format into the kernel +// debugger register format. +// +void +RemoteGDB::setregs() +{ + // @todo: Currently this is very Alpha specific. + if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + context->setIntReg(AlphaISA::reg_redir[i], gdbregs.regs[i]); + } + } else { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + context->setIntReg(i, gdbregs.regs[i]); + } + } + +#ifdef KGDB_FP_REGS + for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { + context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]); + } +#endif + context->setPC(gdbregs.regs[KGDB_REG_PC]); +} + +void +RemoteGDB::setTempBreakpoint(TempBreakpoint &bkpt, Addr addr) +{ + DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", addr); + + bkpt.address = addr; + insertHardBreak(addr, 4); +} + +void +RemoteGDB::clearTempBreakpoint(TempBreakpoint &bkpt) +{ + DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", + bkpt.address); + + + removeHardBreak(bkpt.address, 4); + bkpt.address = 0; +} + +void +RemoteGDB::clearSingleStep() +{ + DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", + takenBkpt.address, notTakenBkpt.address); + + if (takenBkpt.address != 0) + clearTempBreakpoint(takenBkpt); + + if (notTakenBkpt.address != 0) + clearTempBreakpoint(notTakenBkpt); +} + +void +RemoteGDB::setSingleStep() +{ + Addr pc = context->readPC(); + Addr npc, bpc; + bool set_bt = false; + + npc = pc + sizeof(MachInst); + + // User was stopped at pc, e.g. the instruction at pc was not + // executed. + MachInst inst = read<MachInst>(pc); + StaticInstPtr si(inst); + if (si->hasBranchTarget(pc, context, bpc)) { + // Don't bother setting a breakpoint on the taken branch if it + // is the same as the next pc + if (bpc != npc) + set_bt = true; + } + + DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", + takenBkpt.address, notTakenBkpt.address); + + setTempBreakpoint(notTakenBkpt, npc); + + if (set_bt) + setTempBreakpoint(takenBkpt, bpc); +} + +// Write bytes to kernel address space for debugger. +bool +RemoteGDB::write(Addr vaddr, size_t size, const char *data) +{ + if (BaseRemoteGDB::write(vaddr, size, data)) { +#ifdef IMB + alpha_pal_imb(); +#endif + return true; + } else { + return false; + } +} + + +PCEventQueue *RemoteGDB::getPcEventQueue() +{ + return &system->pcEventQueue; +} + + +RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB *_gdb, Addr pc) + : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc), + gdb(_gdb), refcount(0) +{ + DPRINTF(GDBMisc, "creating hardware breakpoint at %#x\n", evpc); +} + +void +RemoteGDB::HardBreakpoint::process(ThreadContext *tc) +{ + DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc()); + + if (tc == gdb->context) + gdb->trap(ALPHA_KENTRY_INT); +} + +bool +RemoteGDB::insertSoftBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + return insertHardBreak(addr, len); +} + +bool +RemoteGDB::removeSoftBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + return removeHardBreak(addr, len); +} + +bool +RemoteGDB::insertHardBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + DPRINTF(GDBMisc, "inserting hardware breakpoint at %#x\n", addr); + + HardBreakpoint *&bkpt = hardBreakMap[addr]; + if (bkpt == 0) + bkpt = new HardBreakpoint(this, addr); + + bkpt->refcount++; + + return true; +} + +bool +RemoteGDB::removeHardBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + DPRINTF(GDBMisc, "removing hardware breakpoint at %#x\n", addr); + + break_iter_t i = hardBreakMap.find(addr); + if (i == hardBreakMap.end()) + return false; + + HardBreakpoint *hbp = (*i).second; + if (--hbp->refcount == 0) { + delete hbp; + hardBreakMap.erase(i); + } + + return true; +} diff --git a/src/arch/alpha/remote_gdb.hh b/src/arch/alpha/remote_gdb.hh new file mode 100644 index 000000000..1dd4ada38 --- /dev/null +++ b/src/arch/alpha/remote_gdb.hh @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Nathan Binkert + */ + +#ifndef __ARCH_ALPHA_REMOTE_GDB_HH__ +#define __ARCH_ALPHA_REMOTE_GDB_HH__ + +#include <map> + +#include "arch/alpha/types.hh" +#include "arch/alpha/kgdb.h" +#include "base/remote_gdb.hh" +#include "cpu/pc_event.hh" +#include "base/pollevent.hh" +#include "base/socket.hh" + +class System; +class ThreadContext; +class PhysicalMemory; + +namespace AlphaISA +{ + class RemoteGDB : public BaseRemoteGDB + { + private: + friend void debugger(); + friend class GDBListener; + + protected: + class Event : public PollEvent + { + protected: + RemoteGDB *gdb; + + public: + Event(RemoteGDB *g, int fd, int e); + void process(int revent); + }; + + friend class Event; + Event *event; + + protected: + // Machine memory + bool write(Addr addr, size_t size, const char *data); + + public: + RemoteGDB(System *system, ThreadContext *context); + ~RemoteGDB(); + + bool acc(Addr addr, size_t len); + + protected: + void getregs(); + void setregs(); + + void clearSingleStep(); + void setSingleStep(); + + PCEventQueue *getPcEventQueue(); + + protected: + class HardBreakpoint : public PCEvent + { + private: + RemoteGDB *gdb; + + public: + int refcount; + + public: + HardBreakpoint(RemoteGDB *_gdb, Addr addr); + std::string name() { return gdb->name() + ".hwbkpt"; } + + virtual void process(ThreadContext *tc); + }; + friend class HardBreakpoint; + + typedef std::map<Addr, HardBreakpoint *> break_map_t; + typedef break_map_t::iterator break_iter_t; + break_map_t hardBreakMap; + + bool insertSoftBreak(Addr addr, size_t len); + bool removeSoftBreak(Addr addr, size_t len); + bool insertHardBreak(Addr addr, size_t len); + bool removeHardBreak(Addr addr, size_t len); + + protected: + struct TempBreakpoint { + Addr address; // set here + MachInst bkpt_inst; // saved instruction at bkpt + int init_count; // number of times to skip bkpt + int count; // current count + }; + + TempBreakpoint notTakenBkpt; + TempBreakpoint takenBkpt; + + void clearTempBreakpoint(TempBreakpoint &bkpt); + void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); + }; +} + +#endif /* __ARCH_ALPHA_REMOTE_GDB_H__ */ diff --git a/src/arch/alpha/system.cc b/src/arch/alpha/system.cc index 5597eaedc..710f6ef46 100644 --- a/src/arch/alpha/system.cc +++ b/src/arch/alpha/system.cc @@ -31,8 +31,8 @@ #include "arch/alpha/ev5.hh" #include "arch/alpha/system.hh" +#include "arch/alpha/remote_gdb.hh" #include "arch/vtophys.hh" -#include "base/remote_gdb.hh" #include "base/loader/object_file.hh" #include "base/loader/symtab.hh" #include "base/trace.hh" diff --git a/src/arch/sparc/remote_gdb.cc b/src/arch/sparc/remote_gdb.cc new file mode 100644 index 000000000..2e662af7f --- /dev/null +++ b/src/arch/sparc/remote_gdb.cc @@ -0,0 +1,456 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Nathan Binkert + */ + +/* + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Lawrence Berkeley Laboratories. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 + */ + +/*- + * Copyright (c) 2001 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ + * + * Taken from NetBSD + * + * "Stub" to allow remote cpu to debug over a serial line using gdb. + */ + +#include <sys/signal.h> + +#include <string> +#include <unistd.h> + +#include "arch/vtophys.hh" +#include "arch/sparc/remote_gdb.hh" +#include "base/intmath.hh" +#include "base/kgdb.h" +#include "base/remote_gdb.hh" +#include "base/socket.hh" +#include "base/trace.hh" +#include "config/full_system.hh" +#include "cpu/thread_context.hh" +#include "cpu/static_inst.hh" +#include "mem/physical.hh" +#include "mem/port.hh" +#include "sim/system.hh" + +using namespace std; +using namespace TheISA; + +RemoteGDB::Event::Event(RemoteGDB *g, int fd, int e) + : PollEvent(fd, e), gdb(g) +{} + +void +RemoteGDB::Event::process(int revent) +{ + if (revent & POLLIN) + gdb->trap(ALPHA_KENTRY_IF); + else if (revent & POLLNVAL) + gdb->detach(); +} + +RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) + : BaseRemoteGDB(_system, c, KGDB_NUMREGS), + event(NULL) +{} + +RemoteGDB::~RemoteGDB() +{ + if (event) + delete event; +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::acc +// +// Determine if the mapping at va..(va+len) is valid. +// +bool +RemoteGDB::acc(Addr va, size_t len) +{ + Addr last_va; + + va = TheISA::TruncPage(va); + last_va = TheISA::RoundPage(va + len); + + do { + if (TheISA::IsK0Seg(va)) { + if (va < (TheISA::K0SegBase + pmem->size())) { + DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " + "%#x < K0SEG + size\n", va); + return true; + } else { + DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n", + va); + return false; + } + } + + /** + * This code says that all accesses to palcode (instruction and data) + * are valid since there isn't a va->pa mapping because palcode is + * accessed physically. At some point this should probably be cleaned up + * but there is no easy way to do it. + */ + + if (AlphaISA::PcPAL(va) || va < 0x10000) + return true; + + Addr ptbr = context->readMiscReg(AlphaISA::IPR_PALtemp20); + TheISA::PageTableEntry pte = TheISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va); + if (!pte.valid()) { + DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); + return false; + } + va += TheISA::PageBytes; + } while (va < last_va); + + DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); + return true; +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::signal +// +// Translate a trap number into a Unix-compatible signal number. +// (GDB only understands Unix signal numbers.) +// +int +RemoteGDB::signal(int type) +{ + switch (type) { + case ALPHA_KENTRY_INT: + return (SIGTRAP); + + case ALPHA_KENTRY_UNA: + return (SIGBUS); + + case ALPHA_KENTRY_ARITH: + return (SIGFPE); + + case ALPHA_KENTRY_IF: + return (SIGILL); + + case ALPHA_KENTRY_MM: + return (SIGSEGV); + + default: + panic("unknown signal type"); + return 0; + } +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::getregs +// +// Translate the kernel debugger register format into +// the GDB register format. +void +RemoteGDB::getregs() +{ + memset(gdbregs.regs, 0, gdbregs.size); + + gdbregs.regs[KGDB_REG_PC] = context->readPC(); + + // @todo: Currently this is very Alpha specific. + if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + gdbregs.regs[i] = context->readIntReg(AlphaISA::reg_redir[i]); + } + } else { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + gdbregs.regs[i] = context->readIntReg(i); + } + } + +#ifdef KGDB_FP_REGS + for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { + gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i); + } +#endif +} + +/////////////////////////////////////////////////////////// +// RemoteGDB::setregs +// +// Translate the GDB register format into the kernel +// debugger register format. +// +void +RemoteGDB::setregs() +{ + // @todo: Currently this is very Alpha specific. + if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + context->setIntReg(AlphaISA::reg_redir[i], gdbregs.regs[i]); + } + } else { + for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { + context->setIntReg(i, gdbregs.regs[i]); + } + } + +#ifdef KGDB_FP_REGS + for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { + context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]); + } +#endif + context->setPC(gdbregs.regs[KGDB_REG_PC]); +} + +void +RemoteGDB::setTempBreakpoint(TempBreakpoint &bkpt, Addr addr) +{ + DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", addr); + + bkpt.address = addr; + insertHardBreak(addr, 4); +} + +void +RemoteGDB::clearTempBreakpoint(TempBreakpoint &bkpt) +{ + DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", + bkpt.address); + + + removeHardBreak(bkpt.address, 4); + bkpt.address = 0; +} + +void +RemoteGDB::clearSingleStep() +{ + DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", + takenBkpt.address, notTakenBkpt.address); + + if (takenBkpt.address != 0) + clearTempBreakpoint(takenBkpt); + + if (notTakenBkpt.address != 0) + clearTempBreakpoint(notTakenBkpt); +} + +void +RemoteGDB::setSingleStep() +{ + Addr pc = context->readPC(); + Addr npc, bpc; + bool set_bt = false; + + npc = pc + sizeof(MachInst); + + // User was stopped at pc, e.g. the instruction at pc was not + // executed. + MachInst inst = read<MachInst>(pc); + StaticInstPtr si(inst); + if (si->hasBranchTarget(pc, context, bpc)) { + // Don't bother setting a breakpoint on the taken branch if it + // is the same as the next pc + if (bpc != npc) + set_bt = true; + } + + DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", + takenBkpt.address, notTakenBkpt.address); + + setTempBreakpoint(notTakenBkpt, npc); + + if (set_bt) + setTempBreakpoint(takenBkpt, bpc); +} + +// Write bytes to kernel address space for debugger. +bool +RemoteGDB::write(Addr vaddr, size_t size, const char *data) +{ + if (BaseRemoteGDB::write(vaddr, size, data)) { +#ifdef IMB + alpha_pal_imb(); +#endif + return true; + } else { + return false; + } +} + + +PCEventQueue *RemoteGDB::getPcEventQueue() +{ + return &system->pcEventQueue; +} + + +RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB *_gdb, Addr pc) + : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc), + gdb(_gdb), refcount(0) +{ + DPRINTF(GDBMisc, "creating hardware breakpoint at %#x\n", evpc); +} + +void +RemoteGDB::HardBreakpoint::process(ThreadContext *tc) +{ + DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc()); + + if (tc == gdb->context) + gdb->trap(ALPHA_KENTRY_INT); +} + +bool +RemoteGDB::insertSoftBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + return insertHardBreak(addr, len); +} + +bool +RemoteGDB::removeSoftBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + return removeHardBreak(addr, len); +} + +bool +RemoteGDB::insertHardBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + DPRINTF(GDBMisc, "inserting hardware breakpoint at %#x\n", addr); + + HardBreakpoint *&bkpt = hardBreakMap[addr]; + if (bkpt == 0) + bkpt = new HardBreakpoint(this, addr); + + bkpt->refcount++; + + return true; +} + +bool +RemoteGDB::removeHardBreak(Addr addr, size_t len) +{ + if (len != sizeof(MachInst)) + panic("invalid length\n"); + + DPRINTF(GDBMisc, "removing hardware breakpoint at %#x\n", addr); + + break_iter_t i = hardBreakMap.find(addr); + if (i == hardBreakMap.end()) + return false; + + HardBreakpoint *hbp = (*i).second; + if (--hbp->refcount == 0) { + delete hbp; + hardBreakMap.erase(i); + } + + return true; +} diff --git a/src/arch/sparc/remote_gdb.hh b/src/arch/sparc/remote_gdb.hh new file mode 100644 index 000000000..6ac4f296f --- /dev/null +++ b/src/arch/sparc/remote_gdb.hh @@ -0,0 +1,129 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Nathan Binkert + */ + +#ifndef __ARCH_ALPHA_REMOTE_GDB_HH__ +#define __ARCH_ALPHA_REMOTE_GDB_HH__ + +#include <map> + +#include "arch/types.hh" +#include "base/remote_gdb.hh" +#include "cpu/pc_event.hh" +#include "base/pollevent.hh" + +class System; +class ThreadContext; +class PhysicalMemory; + +namespace SparcISA +{ + class RemoteGDB : public BaseRemoteGDB + { + private: + friend void debugger(); + friend class GDBListener; + + protected: + class Event : public PollEvent + { + protected: + RemoteGDB *gdb; + + public: + Event(RemoteGDB *g, int fd, int e); + void process(int revent); + }; + + friend class Event; + Event *event; + + protected: + // Machine memory + bool write(Addr addr, size_t size, const char *data); + + public: + RemoteGDB(System *system, ThreadContext *context); + ~RemoteGDB(); + + bool acc(Addr addr, size_t len); + int signal(int type); + + protected: + void getregs(); + void setregs(); + + void clearSingleStep(); + void setSingleStep(); + + PCEventQueue *getPcEventQueue(); + + protected: + class HardBreakpoint : public PCEvent + { + private: + RemoteGDB *gdb; + + public: + int refcount; + + public: + HardBreakpoint(RemoteGDB *_gdb, Addr addr); + std::string name() { return gdb->name() + ".hwbkpt"; } + + virtual void process(ThreadContext *tc); + }; + friend class HardBreakpoint; + + typedef std::map<Addr, HardBreakpoint *> break_map_t; + typedef break_map_t::iterator break_iter_t; + break_map_t hardBreakMap; + + bool insertSoftBreak(Addr addr, size_t len); + bool removeSoftBreak(Addr addr, size_t len); + bool insertHardBreak(Addr addr, size_t len); + bool removeHardBreak(Addr addr, size_t len); + + protected: + struct TempBreakpoint { + Addr address; // set here + MachInst bkpt_inst; // saved instruction at bkpt + int init_count; // number of times to skip bkpt + int count; // current count + }; + + TempBreakpoint notTakenBkpt; + TempBreakpoint takenBkpt; + + void clearTempBreakpoint(TempBreakpoint &bkpt); + void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); + }; +} + +#endif /* __ARCH_ALPHA_REMOTE_GDB_H__ */ diff --git a/src/base/remote_gdb.cc b/src/base/remote_gdb.cc index e4efa31e3..01166d46f 100644 --- a/src/base/remote_gdb.cc +++ b/src/base/remote_gdb.cc @@ -123,7 +123,6 @@ #include "arch/vtophys.hh" #include "base/intmath.hh" -#include "base/kgdb.h" #include "base/remote_gdb.hh" #include "base/socket.hh" #include "base/trace.hh" @@ -138,18 +137,18 @@ using namespace std; using namespace TheISA; #ifndef NDEBUG -vector<RemoteGDB *> debuggers; -int current_debugger = -1; +vector<BaseRemoteGDB *> debuggers; void debugger() { + static int current_debugger = -1; if (current_debugger >= 0 && current_debugger < debuggers.size()) { - RemoteGDB *gdb = debuggers[current_debugger]; + BaseRemoteGDB *gdb = debuggers[current_debugger]; if (!gdb->isattached()) gdb->listener->accept(); if (gdb->isattached()) - gdb->trap(ALPHA_KENTRY_IF); + gdb->trap(SIGILL); } } #endif @@ -169,7 +168,7 @@ GDBListener::Event::process(int revent) listener->accept(); } -GDBListener::GDBListener(RemoteGDB *g, int p) +GDBListener::GDBListener(BaseRemoteGDB *g, int p) : event(NULL), gdb(g), port(p) { assert(!gdb->listener); @@ -229,55 +228,46 @@ GDBListener::accept() } } -/////////////////////////////////////////////////////////// -// -// -// -int digit2i(char); -char i2digit(int); -void mem2hex(void *, const void *, int); -const char *hex2mem(void *, const char *, int); -Addr hex2i(const char **); - -RemoteGDB::Event::Event(RemoteGDB *g, int fd, int e) +BaseRemoteGDB::Event::Event(BaseRemoteGDB *g, int fd, int e) : PollEvent(fd, e), gdb(g) {} void -RemoteGDB::Event::process(int revent) +BaseRemoteGDB::Event::process(int revent) { if (revent & POLLIN) - gdb->trap(ALPHA_KENTRY_IF); + gdb->trap(SIGILL); else if (revent & POLLNVAL) gdb->detach(); } -RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) +BaseRemoteGDB::BaseRemoteGDB(System *_system, ThreadContext *c, size_t cacheSize) : event(NULL), listener(NULL), number(-1), fd(-1), active(false), attached(false), - system(_system), pmem(_system->physmem), context(c) + system(_system), pmem(_system->physmem), context(c), + gdbregs(cacheSize) { - memset(gdbregs, 0, sizeof(gdbregs)); + memset(gdbregs.regs, 0, gdbregs.size); } -RemoteGDB::~RemoteGDB() +BaseRemoteGDB::~BaseRemoteGDB() { if (event) delete event; } string -RemoteGDB::name() +BaseRemoteGDB::name() { return system->name() + ".remote_gdb"; } bool -RemoteGDB::isattached() +BaseRemoteGDB::isattached() { return attached; } void -RemoteGDB::attach(int f) +BaseRemoteGDB::attach(int f) { fd = f; @@ -289,7 +279,7 @@ RemoteGDB::attach(int f) } void -RemoteGDB::detach() +BaseRemoteGDB::detach() { attached = false; close(fd); @@ -300,250 +290,50 @@ RemoteGDB::detach() } const char * -gdb_command(char cmd) +BaseRemoteGDB::gdb_command(char cmd) { switch (cmd) { - case KGDB_SIGNAL: return "KGDB_SIGNAL"; - case KGDB_SET_BAUD: return "KGDB_SET_BAUD"; - case KGDB_SET_BREAK: return "KGDB_SET_BREAK"; - case KGDB_CONT: return "KGDB_CONT"; - case KGDB_ASYNC_CONT: return "KGDB_ASYNC_CONT"; - case KGDB_DEBUG: return "KGDB_DEBUG"; - case KGDB_DETACH: return "KGDB_DETACH"; - case KGDB_REG_R: return "KGDB_REG_R"; - case KGDB_REG_W: return "KGDB_REG_W"; - case KGDB_SET_THREAD: return "KGDB_SET_THREAD"; - case KGDB_CYCLE_STEP: return "KGDB_CYCLE_STEP"; - case KGDB_SIG_CYCLE_STEP: return "KGDB_SIG_CYCLE_STEP"; - case KGDB_KILL: return "KGDB_KILL"; - case KGDB_MEM_W: return "KGDB_MEM_W"; - case KGDB_MEM_R: return "KGDB_MEM_R"; - case KGDB_SET_REG: return "KGDB_SET_REG"; - case KGDB_READ_REG: return "KGDB_READ_REG"; - case KGDB_QUERY_VAR: return "KGDB_QUERY_VAR"; - case KGDB_SET_VAR: return "KGDB_SET_VAR"; - case KGDB_RESET: return "KGDB_RESET"; - case KGDB_STEP: return "KGDB_STEP"; - case KGDB_ASYNC_STEP: return "KGDB_ASYNC_STEP"; - case KGDB_THREAD_ALIVE: return "KGDB_THREAD_ALIVE"; - case KGDB_TARGET_EXIT: return "KGDB_TARGET_EXIT"; - case KGDB_BINARY_DLOAD: return "KGDB_BINARY_DLOAD"; - case KGDB_CLR_HW_BKPT: return "KGDB_CLR_HW_BKPT"; - case KGDB_SET_HW_BKPT: return "KGDB_SET_HW_BKPT"; - case KGDB_START: return "KGDB_START"; - case KGDB_END: return "KGDB_END"; - case KGDB_GOODP: return "KGDB_GOODP"; - case KGDB_BADP: return "KGDB_BADP"; + case GDBSignal: return "KGDB_SIGNAL"; + case GDBSetBaud: return "KGDB_SET_BAUD"; + case GDBSetBreak: return "KGDB_SET_BREAK"; + case GDBCont: return "KGDB_CONT"; + case GDBAsyncCont: return "KGDB_ASYNC_CONT"; + case GDBDebug: return "KGDB_DEBUG"; + case GDBDetach: return "KGDB_DETACH"; + case GDBRegR: return "KGDB_REG_R"; + case GDBRegW: return "KGDB_REG_W"; + case GDBSetThread: return "KGDB_SET_THREAD"; + case GDBCycleStep: return "KGDB_CYCLE_STEP"; + case GDBSigCycleStep: return "KGDB_SIG_CYCLE_STEP"; + case GDBKill: return "KGDB_KILL"; + case GDBMemW: return "KGDB_MEM_W"; + case GDBMemR: return "KGDB_MEM_R"; + case GDBSetReg: return "KGDB_SET_REG"; + case GDBReadReg: return "KGDB_READ_REG"; + case GDBQueryVar: return "KGDB_QUERY_VAR"; + case GDBSetVar: return "KGDB_SET_VAR"; + case GDBReset: return "KGDB_RESET"; + case GDBStep: return "KGDB_STEP"; + case GDBAsyncStep: return "KGDB_ASYNC_STEP"; + case GDBThreadAlive: return "KGDB_THREAD_ALIVE"; + case GDBTargetExit: return "KGDB_TARGET_EXIT"; + case GDBBinaryDload: return "KGDB_BINARY_DLOAD"; + case GDBClrHwBkpt: return "KGDB_CLR_HW_BKPT"; + case GDBSetHwBkpt: return "KGDB_SET_HW_BKPT"; + case GDBStart: return "KGDB_START"; + case GDBEnd: return "KGDB_END"; + case GDBGoodP: return "KGDB_GOODP"; + case GDBBadP: return "KGDB_BADP"; default: return "KGDB_UNKNOWN"; } } -/////////////////////////////////////////////////////////// -// RemoteGDB::acc -// -// Determine if the mapping at va..(va+len) is valid. -// -bool -RemoteGDB::acc(Addr va, size_t len) -{ - Addr last_va; - - va = TheISA::TruncPage(va); - last_va = TheISA::RoundPage(va + len); - - do { - if (TheISA::IsK0Seg(va)) { - if (va < (TheISA::K0SegBase + pmem->size())) { - DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " - "%#x < K0SEG + size\n", va); - return true; - } else { - DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n", - va); - return false; - } - } - - /** - * This code says that all accesses to palcode (instruction and data) - * are valid since there isn't a va->pa mapping because palcode is - * accessed physically. At some point this should probably be cleaned up - * but there is no easy way to do it. - */ - - if (AlphaISA::PcPAL(va) || va < 0x10000) - return true; - - Addr ptbr = context->readMiscReg(AlphaISA::IPR_PALtemp20); - TheISA::PageTableEntry pte = TheISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va); - if (!pte.valid()) { - DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); - return false; - } - va += TheISA::PageBytes; - } while (va < last_va); - - DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); - return true; -} - -/////////////////////////////////////////////////////////// -// RemoteGDB::signal -// -// Translate a trap number into a Unix-compatible signal number. -// (GDB only understands Unix signal numbers.) -// -int -RemoteGDB::signal(int type) -{ - switch (type) { - case ALPHA_KENTRY_INT: - return (SIGTRAP); - - case ALPHA_KENTRY_UNA: - return (SIGBUS); - - case ALPHA_KENTRY_ARITH: - return (SIGFPE); - - case ALPHA_KENTRY_IF: - return (SIGILL); - - case ALPHA_KENTRY_MM: - return (SIGSEGV); - - default: - panic("unknown signal type"); - return 0; - } -} - -/////////////////////////////////////////////////////////// -// RemoteGDB::getregs -// -// Translate the kernel debugger register format into -// the GDB register format. -void -RemoteGDB::getregs() -{ - memset(gdbregs, 0, sizeof(gdbregs)); - - gdbregs[KGDB_REG_PC] = context->readPC(); - - // @todo: Currently this is very Alpha specific. - if (AlphaISA::PcPAL(gdbregs[KGDB_REG_PC])) { - for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { - gdbregs[i] = context->readIntReg(AlphaISA::reg_redir[i]); - } - } else { - for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { - gdbregs[i] = context->readIntReg(i); - } - } - -#ifdef KGDB_FP_REGS - for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { - gdbregs[i + KGDB_REG_F0] = context->readFloatRegBits(i); - } -#endif -} - -/////////////////////////////////////////////////////////// -// RemoteGDB::setregs -// -// Translate the GDB register format into the kernel -// debugger register format. -// -void -RemoteGDB::setregs() -{ - // @todo: Currently this is very Alpha specific. - if (AlphaISA::PcPAL(gdbregs[KGDB_REG_PC])) { - for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { - context->setIntReg(AlphaISA::reg_redir[i], gdbregs[i]); - } - } else { - for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { - context->setIntReg(i, gdbregs[i]); - } - } - -#ifdef KGDB_FP_REGS - for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { - context->setFloatRegBits(i, gdbregs[i + KGDB_REG_F0]); - } -#endif - context->setPC(gdbregs[KGDB_REG_PC]); -} - -void -RemoteGDB::setTempBreakpoint(TempBreakpoint &bkpt, Addr addr) -{ - DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", addr); - - bkpt.address = addr; - insertHardBreak(addr, 4); -} - -void -RemoteGDB::clearTempBreakpoint(TempBreakpoint &bkpt) -{ - DPRINTF(GDBMisc, "setTempBreakpoint: addr=%#x\n", - bkpt.address); - - - removeHardBreak(bkpt.address, 4); - bkpt.address = 0; -} - -void -RemoteGDB::clearSingleStep() -{ - DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", - takenBkpt.address, notTakenBkpt.address); - - if (takenBkpt.address != 0) - clearTempBreakpoint(takenBkpt); - - if (notTakenBkpt.address != 0) - clearTempBreakpoint(notTakenBkpt); -} - -void -RemoteGDB::setSingleStep() -{ - Addr pc = context->readPC(); - Addr npc, bpc; - bool set_bt = false; - - npc = pc + sizeof(MachInst); - - // User was stopped at pc, e.g. the instruction at pc was not - // executed. - MachInst inst = read<MachInst>(pc); - StaticInstPtr si(inst); - if (si->hasBranchTarget(pc, context, bpc)) { - // Don't bother setting a breakpoint on the taken branch if it - // is the same as the next pc - if (bpc != npc) - set_bt = true; - } - - DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", - takenBkpt.address, notTakenBkpt.address); - - setTempBreakpoint(notTakenBkpt, npc); - - if (set_bt) - setTempBreakpoint(takenBkpt, bpc); -} - ///////////////////////// // // uint8_t -RemoteGDB::getbyte() +BaseRemoteGDB::getbyte() { uint8_t b; ::read(fd, &b, 1); @@ -551,14 +341,14 @@ RemoteGDB::getbyte() } void -RemoteGDB::putbyte(uint8_t b) +BaseRemoteGDB::putbyte(uint8_t b) { ::write(fd, &b, 1); } // Send a packet to gdb void -RemoteGDB::send(const char *bp) +BaseRemoteGDB::send(const char *bp) { const char *p; uint8_t csum, c; @@ -567,20 +357,26 @@ RemoteGDB::send(const char *bp) do { p = bp; - putbyte(KGDB_START); + //Start sending a packet + putbyte(GDBStart); + //Send the contents, and also keep a check sum. for (csum = 0; (c = *p); p++) { putbyte(c); csum += c; } - putbyte(KGDB_END); + //Send the ending character. + putbyte(GDBEnd); + //Sent the checksum. putbyte(i2digit(csum >> 4)); putbyte(i2digit(csum)); - } while ((c = getbyte() & 0x7f) == KGDB_BADP); + //Try transmitting over and over again until the other end doesn't send an + //error back. + } while ((c = getbyte() & 0x7f) == GDBBadP); } // Receive a packet from gdb int -RemoteGDB::recv(char *bp, int maxlen) +BaseRemoteGDB::recv(char *bp, int maxlen) { char *p; int c, csum; @@ -589,28 +385,37 @@ RemoteGDB::recv(char *bp, int maxlen) do { p = bp; csum = len = 0; - while ((c = getbyte()) != KGDB_START) + //Find the beginning of a packet + while ((c = getbyte()) != GDBStart) ; - while ((c = getbyte()) != KGDB_END && len < maxlen) { + //Read until you find the end of the data in the packet, and keep + //track of the check sum. + while ((c = getbyte()) != GDBEnd && len < maxlen) { c &= 0x7f; csum += c; *p++ = c; len++; } + + //Mask the check sum, and terminate the command string. csum &= 0xff; *p = '\0'; + //If the command was too long, report an error. if (len >= maxlen) { - putbyte(KGDB_BADP); + putbyte(GDBBadP); continue; } + //Bring in the checksum. If the check sum matches, csum will be 0. csum -= digit2i(getbyte()) * 16; csum -= digit2i(getbyte()); + //If the check sum was correct if (csum == 0) { - putbyte(KGDB_GOODP); + //Report that the packet was received correctly + putbyte(GDBGoodP); // Sequence present? if (bp[2] == ':') { putbyte(bp[0]); @@ -620,7 +425,8 @@ RemoteGDB::recv(char *bp, int maxlen) } break; } - putbyte(KGDB_BADP); + //Otherwise, report that there was a mistake. + putbyte(GDBBadP); } while (1); DPRINTF(GDBRecv, "recv: %s: %s\n", gdb_command(*bp), bp); @@ -630,7 +436,7 @@ RemoteGDB::recv(char *bp, int maxlen) // Read bytes from kernel address space for debugger. bool -RemoteGDB::read(Addr vaddr, size_t size, char *data) +BaseRemoteGDB::read(Addr vaddr, size_t size, char *data) { static Addr lastaddr = 0; static size_t lastsize = 0; @@ -662,7 +468,7 @@ RemoteGDB::read(Addr vaddr, size_t size, char *data) // Write bytes to kernel address space for debugger. bool -RemoteGDB::write(Addr vaddr, size_t size, const char *data) +BaseRemoteGDB::write(Addr vaddr, size_t size, const char *data) { static Addr lastaddr = 0; static size_t lastsize = 0; @@ -685,21 +491,15 @@ RemoteGDB::write(Addr vaddr, size_t size, const char *data) vp->writeBlob(vaddr, (uint8_t*)data, size); context->delVirtPort(vp); -#ifdef IMB - alpha_pal_imb(); -#endif - return true; } - -PCEventQueue *RemoteGDB::getPcEventQueue() +PCEventQueue *BaseRemoteGDB::getPcEventQueue() { return &system->pcEventQueue; } - -RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB *_gdb, Addr pc) +BaseRemoteGDB::HardBreakpoint::HardBreakpoint(BaseRemoteGDB *_gdb, Addr pc) : PCEvent(_gdb->getPcEventQueue(), "HardBreakpoint Event", pc), gdb(_gdb), refcount(0) { @@ -707,25 +507,25 @@ RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB *_gdb, Addr pc) } void -RemoteGDB::HardBreakpoint::process(ThreadContext *tc) +BaseRemoteGDB::HardBreakpoint::process(ThreadContext *tc) { DPRINTF(GDBMisc, "handling hardware breakpoint at %#x\n", pc()); if (tc == gdb->context) - gdb->trap(ALPHA_KENTRY_INT); + gdb->trap(SIGTRAP); } bool -RemoteGDB::insertSoftBreak(Addr addr, size_t len) +BaseRemoteGDB::insertSoftBreak(Addr addr, size_t len) { - if (len != sizeof(MachInst)) + if (len != sizeof(TheISA::MachInst)) panic("invalid length\n"); return insertHardBreak(addr, len); } bool -RemoteGDB::removeSoftBreak(Addr addr, size_t len) +BaseRemoteGDB::removeSoftBreak(Addr addr, size_t len) { if (len != sizeof(MachInst)) panic("invalid length\n"); @@ -734,7 +534,7 @@ RemoteGDB::removeSoftBreak(Addr addr, size_t len) } bool -RemoteGDB::insertHardBreak(Addr addr, size_t len) +BaseRemoteGDB::insertHardBreak(Addr addr, size_t len) { if (len != sizeof(MachInst)) panic("invalid length\n"); @@ -751,7 +551,7 @@ RemoteGDB::insertHardBreak(Addr addr, size_t len) } bool -RemoteGDB::removeHardBreak(Addr addr, size_t len) +BaseRemoteGDB::removeHardBreak(Addr addr, size_t len) { if (len != sizeof(MachInst)) panic("invalid length\n"); @@ -772,7 +572,7 @@ RemoteGDB::removeHardBreak(Addr addr, size_t len) } const char * -break_type(char c) +BaseRemoteGDB::break_type(char c) { switch(c) { case '0': return "software breakpoint"; @@ -790,12 +590,12 @@ break_type(char c) // makes sense to use POSIX errno values, because that is what the // gdb/remote.c functions want to return. bool -RemoteGDB::trap(int type) +BaseRemoteGDB::trap(int type) { uint64_t val; size_t datalen, len; - char data[KGDB_BUFLEN + 1]; - char buffer[sizeof(gdbregs) * 2 + 256]; + char data[GDBPacketBufLen + 1]; + char buffer[gdbregs.size * 2 + 256]; const char *p; char command, subcmd; string var; @@ -823,7 +623,7 @@ RemoteGDB::trap(int type) active = true; else // Tell remote host that an exception has occurred. - snprintf((char *)buffer, sizeof(buffer), "S%02x", signal(type)); + snprintf((char *)buffer, sizeof(buffer), "S%02x", type); send(buffer); // Stick frame regs into our reg cache. @@ -837,24 +637,25 @@ RemoteGDB::trap(int type) p = data + 1; switch (command) { - case KGDB_SIGNAL: + case GDBSignal: // if this command came from a running gdb, answer it -- // the other guy has no way of knowing if we're in or out // of this loop when he issues a "remote-signal". - snprintf((char *)buffer, sizeof(buffer), "S%02x", signal(type)); + snprintf((char *)buffer, sizeof(buffer), + "S%02x", type); send(buffer); continue; - case KGDB_REG_R: - if (2 * sizeof(gdbregs) > sizeof(buffer)) + case GDBRegR: + if (2 * gdbregs.size > sizeof(buffer)) panic("buffer too small"); - mem2hex(buffer, gdbregs, sizeof(gdbregs)); + mem2hex(buffer, gdbregs.regs, gdbregs.size); send(buffer); continue; - case KGDB_REG_W: - p = hex2mem(gdbregs, p, sizeof(gdbregs)); + case GDBRegW: + p = hex2mem(gdbregs.regs, p, gdbregs.size); if (p == NULL || *p != '\0') send("E01"); else { @@ -864,7 +665,7 @@ RemoteGDB::trap(int type) continue; #if 0 - case KGDB_SET_REG: + case GDBSetReg: val = hex2i(&p); if (*p++ != '=') { send("E01"); @@ -875,14 +676,14 @@ RemoteGDB::trap(int type) continue; } - gdbregs[val] = hex2i(&p); + gdbregs.regs[val] = hex2i(&p); setregs(); send("OK"); continue; #endif - case KGDB_MEM_R: + case GDBMemR: val = hex2i(&p); if (*p++ != ',') { send("E02"); @@ -914,7 +715,7 @@ RemoteGDB::trap(int type) } continue; - case KGDB_MEM_W: + case GDBMemW: val = hex2i(&p); if (*p++ != ',') { send("E06"); @@ -944,7 +745,7 @@ RemoteGDB::trap(int type) send("E0B"); continue; - case KGDB_SET_THREAD: + case GDBSetThread: subcmd = *p++; val = hex2i(&p); if (val == 0) @@ -953,14 +754,14 @@ RemoteGDB::trap(int type) send("E01"); continue; - case KGDB_DETACH: - case KGDB_KILL: + case GDBDetach: + case GDBKill: active = false; clearSingleStep(); detach(); goto out; - case KGDB_ASYNC_CONT: + case GDBAsyncCont: subcmd = hex2i(&p); if (*p++ == ';') { val = hex2i(&p); @@ -970,7 +771,7 @@ RemoteGDB::trap(int type) clearSingleStep(); goto out; - case KGDB_CONT: + case GDBCont: if (p - data < datalen) { val = hex2i(&p); context->setPC(val); @@ -979,7 +780,7 @@ RemoteGDB::trap(int type) clearSingleStep(); goto out; - case KGDB_ASYNC_STEP: + case GDBAsyncStep: subcmd = hex2i(&p); if (*p++ == ';') { val = hex2i(&p); @@ -989,7 +790,7 @@ RemoteGDB::trap(int type) setSingleStep(); goto out; - case KGDB_STEP: + case GDBStep: if (p - data < datalen) { val = hex2i(&p); context->setPC(val); @@ -998,7 +799,7 @@ RemoteGDB::trap(int type) setSingleStep(); goto out; - case KGDB_CLR_HW_BKPT: + case GDBClrHwBkpt: subcmd = *p++; if (*p++ != ',') send("E0D"); val = hex2i(&p); @@ -1030,7 +831,7 @@ RemoteGDB::trap(int type) send(ret ? "OK" : "E0C"); continue; - case KGDB_SET_HW_BKPT: + case GDBSetHwBkpt: subcmd = *p++; if (*p++ != ',') send("E0D"); val = hex2i(&p); @@ -1062,7 +863,7 @@ RemoteGDB::trap(int type) send(ret ? "OK" : "E0C"); continue; - case KGDB_QUERY_VAR: + case GDBQueryVar: var = string(p, datalen - 1); if (var == "C") send("QC0"); @@ -1070,17 +871,17 @@ RemoteGDB::trap(int type) send(""); continue; - case KGDB_SET_BAUD: - case KGDB_SET_BREAK: - case KGDB_DEBUG: - case KGDB_CYCLE_STEP: - case KGDB_SIG_CYCLE_STEP: - case KGDB_READ_REG: - case KGDB_SET_VAR: - case KGDB_RESET: - case KGDB_THREAD_ALIVE: - case KGDB_TARGET_EXIT: - case KGDB_BINARY_DLOAD: + case GDBSetBaud: + case GDBSetBreak: + case GDBDebug: + case GDBCycleStep: + case GDBSigCycleStep: + case GDBReadReg: + case GDBSetVar: + case GDBReset: + case GDBThreadAlive: + case GDBTargetExit: + case GDBBinaryDload: // Unsupported command DPRINTF(GDBMisc, "Unsupported command: %s\n", gdb_command(command)); @@ -1106,7 +907,7 @@ RemoteGDB::trap(int type) // Convert a hex digit into an integer. // This returns -1 if the argument passed is no valid hex digit. int -digit2i(char c) +BaseRemoteGDB::digit2i(char c) { if (c >= '0' && c <= '9') return (c - '0'); @@ -1121,14 +922,14 @@ digit2i(char c) // Convert the low 4 bits of an integer into an hex digit. char -i2digit(int n) +BaseRemoteGDB::i2digit(int n) { return ("0123456789abcdef"[n & 0x0f]); } // Convert a byte array into an hex string. void -mem2hex(void *vdst, const void *vsrc, int len) +BaseRemoteGDB::mem2hex(void *vdst, const void *vsrc, int len) { char *dst = (char *)vdst; const char *src = (const char *)vsrc; @@ -1145,7 +946,7 @@ mem2hex(void *vdst, const void *vsrc, int len) // hex digit. If the string ends in the middle of a byte, NULL is // returned. const char * -hex2mem(void *vdst, const char *src, int maxlen) +BaseRemoteGDB::hex2mem(void *vdst, const char *src, int maxlen) { char *dst = (char *)vdst; int msb, lsb; @@ -1166,7 +967,7 @@ hex2mem(void *vdst, const char *src, int maxlen) // This returns a pointer to the character following the last valid // hex digit. Addr -hex2i(const char **srcp) +BaseRemoteGDB::hex2i(const char **srcp) { const char *src = *srcp; Addr r = 0; diff --git a/src/base/remote_gdb.hh b/src/base/remote_gdb.hh index 8c3ce7572..65e4313eb 100644 --- a/src/base/remote_gdb.hh +++ b/src/base/remote_gdb.hh @@ -34,7 +34,6 @@ #include <map> #include "arch/types.hh" -#include "base/kgdb.h" #include "cpu/pc_event.hh" #include "base/pollevent.hh" #include "base/socket.hh" @@ -44,22 +43,72 @@ class ThreadContext; class PhysicalMemory; class GDBListener; -class RemoteGDB + +enum GDBCommands +{ + GDBSignal = '?', // last signal + GDBSetBaud = 'b', // set baud (depracated) + GDBSetBreak = 'B', // set breakpoint (depracated) + GDBCont = 'c', // resume + GDBAsyncCont = 'C', // continue with signal + GDBDebug = 'd', // toggle debug flags (deprecated) + GDBDetach = 'D', // detach remote gdb + GDBRegR = 'g', // read general registers + GDBRegW = 'G', // write general registers + GDBSetThread = 'H', // set thread + GDBCycleStep = 'i', // step a single cycle + GDBSigCycleStep = 'I', // signal then cycle step + GDBKill = 'k', // kill program + GDBMemR = 'm', // read memory + GDBMemW = 'M', // write memory + GDBReadReg = 'p', // read register + GDBSetReg = 'P', // write register + GDBQueryVar = 'q', // query variable + GDBSetVar = 'Q', // set variable + GDBReset = 'r', // reset system. (Deprecated) + GDBStep = 's', // step + GDBAsyncStep = 'S', // signal and step + GDBThreadAlive = 'T', // find out if the thread is alive + GDBTargetExit = 'W', // target exited + GDBBinaryDload = 'X', // write memory + GDBClrHwBkpt = 'z', // remove breakpoint or watchpoint + GDBSetHwBkpt = 'Z' // insert breakpoint or watchpoint +}; + +const char GDBStart = '$'; +const char GDBEnd = '#'; +const char GDBGoodP = '+'; +const char GDBBadP = '-'; + +const int GDBPacketBufLen = 1024; + +class BaseRemoteGDB { - protected: - typedef TheISA::MachInst MachInst; private: friend void debugger(); friend class GDBListener; + //Helper functions + protected: + int digit2i(char); + char i2digit(int); + Addr hex2i(const char **); + //Address formats, break types, and gdb commands may change + //between architectures, so they're defined as virtual + //functions. + virtual void mem2hex(void *, const void *, int); + virtual const char * hex2mem(void *, const char *, int); + virtual const char * break_type(char c); + virtual const char * gdb_command(char cmd); + protected: class Event : public PollEvent { protected: - RemoteGDB *gdb; + BaseRemoteGDB *gdb; public: - Event(RemoteGDB *g, int fd, int e); + Event(BaseRemoteGDB *g, int fd, int e); void process(int revent); }; @@ -69,8 +118,8 @@ class RemoteGDB int number; protected: + //The socket commands come in through int fd; - uint64_t gdbregs[KGDB_NUMREGS]; protected: #ifdef notyet @@ -84,6 +133,23 @@ class RemoteGDB ThreadContext *context; protected: + class GdbRegCache + { + public: + GdbRegCache(size_t newSize) : regs(new uint64_t[newSize]), size(newSize) + {} + ~GdbRegCache() + { + delete [] regs; + } + + uint64_t * regs; + size_t size; + }; + + GdbRegCache gdbregs; + + protected: uint8_t getbyte(); void putbyte(uint8_t b); @@ -92,15 +158,15 @@ class RemoteGDB protected: // Machine memory - bool read(Addr addr, size_t size, char *data); - bool write(Addr addr, size_t size, const char *data); + virtual bool read(Addr addr, size_t size, char *data); + virtual bool write(Addr addr, size_t size, const char *data); template <class T> T read(Addr addr); template <class T> void write(Addr addr, T data); public: - RemoteGDB(System *system, ThreadContext *context); - ~RemoteGDB(); + BaseRemoteGDB(System *system, ThreadContext *context, size_t cacheSize); + virtual ~BaseRemoteGDB(); void replaceThreadContext(ThreadContext *tc) { context = tc; } @@ -108,16 +174,15 @@ class RemoteGDB void detach(); bool isattached(); - bool acc(Addr addr, size_t len); - static int signal(int type); + virtual bool acc(Addr addr, size_t len) = 0; bool trap(int type); protected: - void getregs(); - void setregs(); + virtual void getregs() = 0; + virtual void setregs() = 0; - void clearSingleStep(); - void setSingleStep(); + virtual void clearSingleStep() = 0; + virtual void setSingleStep() = 0; PCEventQueue *getPcEventQueue(); @@ -125,13 +190,13 @@ class RemoteGDB class HardBreakpoint : public PCEvent { private: - RemoteGDB *gdb; + BaseRemoteGDB *gdb; public: int refcount; public: - HardBreakpoint(RemoteGDB *_gdb, Addr addr); + HardBreakpoint(BaseRemoteGDB *_gdb, Addr addr); std::string name() { return gdb->name() + ".hwbkpt"; } virtual void process(ThreadContext *tc); @@ -147,27 +212,13 @@ class RemoteGDB bool insertHardBreak(Addr addr, size_t len); bool removeHardBreak(Addr addr, size_t len); - protected: - struct TempBreakpoint { - Addr address; // set here - MachInst bkpt_inst; // saved instruction at bkpt - int init_count; // number of times to skip bkpt - int count; // current count - }; - - TempBreakpoint notTakenBkpt; - TempBreakpoint takenBkpt; - - void clearTempBreakpoint(TempBreakpoint &bkpt); - void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); - public: std::string name(); }; template <class T> inline T -RemoteGDB::read(Addr addr) +BaseRemoteGDB::read(Addr addr) { T temp; read(addr, sizeof(T), (char *)&temp); @@ -176,7 +227,7 @@ RemoteGDB::read(Addr addr) template <class T> inline void -RemoteGDB::write(Addr addr, T data) +BaseRemoteGDB::write(Addr addr, T data) { write(addr, sizeof(T), (const char *)&data); } class GDBListener @@ -197,11 +248,11 @@ class GDBListener protected: ListenSocket listener; - RemoteGDB *gdb; + BaseRemoteGDB *gdb; int port; public: - GDBListener(RemoteGDB *g, int p); + GDBListener(BaseRemoteGDB *g, int p); ~GDBListener(); void accept(); diff --git a/src/cpu/o3/fetch_impl.hh b/src/cpu/o3/fetch_impl.hh index 4c39341aa..5ef6e27ea 100644 --- a/src/cpu/o3/fetch_impl.hh +++ b/src/cpu/o3/fetch_impl.hh @@ -45,7 +45,6 @@ #if FULL_SYSTEM #include "arch/tlb.hh" #include "arch/vtophys.hh" -#include "base/remote_gdb.hh" #include "sim/system.hh" #endif // FULL_SYSTEM diff --git a/src/sim/system.cc b/src/sim/system.cc index 11ae492b9..4b42d41fc 100644 --- a/src/sim/system.cc +++ b/src/sim/system.cc @@ -43,7 +43,7 @@ #include "sim/system.hh" #if FULL_SYSTEM #include "arch/vtophys.hh" -#include "base/remote_gdb.hh" +#include "arch/remote_gdb.hh" #include "kern/kernel_stats.hh" #endif diff --git a/src/sim/system.hh b/src/sim/system.hh index 827fe5c78..b3a67bf7a 100644 --- a/src/sim/system.hh +++ b/src/sim/system.hh @@ -56,7 +56,10 @@ class PhysicalMemory; #if FULL_SYSTEM class Platform; class GDBListener; -class RemoteGDB; +namespace TheISA +{ + class RemoteGDB; +} #endif class System : public SimObject @@ -157,7 +160,7 @@ class System : public SimObject #endif public: #if FULL_SYSTEM - std::vector<RemoteGDB *> remoteGDB; + std::vector<TheISA::RemoteGDB *> remoteGDB; std::vector<GDBListener *> gdbListen; virtual bool breakpoint() = 0; #endif // FULL_SYSTEM |