/* * 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 #include #include #include "config/full_system.hh" #if FULL_SYSTEM #include "arch/alpha/vtophys.hh" #endif #include "arch/alpha/kgdb.h" #include "arch/alpha/regredir.hh" #include "arch/alpha/remote_gdb.hh" #include "arch/alpha/utility.hh" #include "base/intmath.hh" #include "base/remote_gdb.hh" #include "base/socket.hh" #include "base/trace.hh" #include "cpu/static_inst.hh" #include "cpu/thread_context.hh" #include "mem/physical.hh" #include "mem/port.hh" #include "sim/system.hh" using namespace std; using namespace AlphaISA; RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc) : BaseRemoteGDB(_system, tc, KGDB_NUMREGS) { memset(gdbregs.regs, 0, gdbregs.bytes()); } /* * Determine if the mapping at va..(va+len) is valid. */ bool RemoteGDB::acc(Addr va, size_t len) { #if !FULL_SYSTEM panic("acc function needs to be rewritten for SE mode\n"); #else Addr last_va; va = TruncPage(va); last_va = RoundPage(va + len); do { if (IsK0Seg(va)) { if (va < (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 (PcPAL(va) || va < 0x10000) return true; Addr ptbr = context->readMiscRegNoEffect(IPR_PALtemp20); PageTableEntry pte = kernel_pte_lookup(context->getPhysPort(), ptbr, va); if (!pte.valid()) { DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); return false; } va += PageBytes; } while (va < last_va); DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); return true; #endif } /* * Translate the kernel debugger register format into the GDB register * format. */ void RemoteGDB::getregs() { memset(gdbregs.regs, 0, gdbregs.bytes()); gdbregs.regs[KGDB_REG_PC] = context->pcState().pc(); // @todo: Currently this is very Alpha specific. if (PcPAL(gdbregs.regs[KGDB_REG_PC])) { for (int i = 0; i < NumIntArchRegs; ++i) { gdbregs.regs[i] = context->readIntReg(reg_redir[i]); } } else { for (int i = 0; i < NumIntArchRegs; ++i) { gdbregs.regs[i] = context->readIntReg(i); } } #ifdef KGDB_FP_REGS for (int i = 0; i < NumFloatArchRegs; ++i) { gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i); } #endif } /* * Translate the GDB register format into the kernel debugger register * format. */ void RemoteGDB::setregs() { // @todo: Currently this is very Alpha specific. if (PcPAL(gdbregs.regs[KGDB_REG_PC])) { for (int i = 0; i < NumIntArchRegs; ++i) { context->setIntReg(reg_redir[i], gdbregs.regs[i]); } } else { for (int i = 0; i < NumIntArchRegs; ++i) { context->setIntReg(i, gdbregs.regs[i]); } } #ifdef KGDB_FP_REGS for (int i = 0; i < NumFloatArchRegs; ++i) { context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]); } #endif context->pcState(gdbregs.regs[KGDB_REG_PC]); } void RemoteGDB::clearSingleStep() { DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", takenBkpt, notTakenBkpt); if (takenBkpt != 0) clearTempBreakpoint(takenBkpt); if (notTakenBkpt != 0) clearTempBreakpoint(notTakenBkpt); } void RemoteGDB::setSingleStep() { PCState pc = context->pcState(); PCState bpc; bool set_bt = false; // User was stopped at pc, e.g. the instruction at pc was not // executed. MachInst inst = read(pc.pc()); StaticInstPtr si(inst, pc.pc()); 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.pc() != pc.npc()) set_bt = true; } DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", takenBkpt, notTakenBkpt); setTempBreakpoint(notTakenBkpt = pc.npc()); if (set_bt) setTempBreakpoint(takenBkpt = bpc.pc()); } // 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; } }