/* * Copyright (c) 2010 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall * not be construed as granting a license to any other intellectual * property including but not limited to intellectual property relating * to a hardware implementation of the functionality of the software * licensed hereunder. You may use the software subject to the license * terms below provided that you ensure that this notice is replicated * unmodified and in its entirety in all distributions of the software, * modified or unmodified, in source code or in binary form. * * 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 * William Wang */ /* * 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/arm/vtophys.hh" #endif #include "arch/arm/pagetable.hh" #include "arch/arm/registers.hh" #include "arch/arm/remote_gdb.hh" #include "arch/arm/utility.hh" #include "arch/arm/vtophys.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 "cpu/thread_state.hh" #include "mem/page_table.hh" #include "mem/physical.hh" #include "mem/port.hh" #include "sim/system.hh" using namespace std; using namespace ArmISA; RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc) : BaseRemoteGDB(_system, tc, NUMREGS) { } /* * Determine if the mapping at va..(va+len) is valid. */ bool RemoteGDB::acc(Addr va, size_t len) { #if FULL_SYSTEM Addr last_va; va = truncPage(va); last_va = roundPage(va + len); do { if (virtvalid(context, va)) { return true; } va += PageBytes; } while (va < last_va); DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); return true; #else TlbEntry entry; //Check to make sure the first byte is mapped into the processes address //space. if (context->getProcessPtr()->pTable->lookup(va, entry)) return true; return false; #endif } /* * Translate the kernel debugger register format into the GDB register * format. */ void RemoteGDB::getregs() { DPRINTF(GDBAcc, "getregs in remotegdb \n"); memset(gdbregs.regs, 0, gdbregs.bytes()); // R0-R15 supervisor mode // arm registers are 32 bits wide, gdb registers are 64 bits wide // two arm registers are packed into one gdb register (little endian) gdbregs.regs[REG_R0 + 0] = context->readIntReg(INTREG_R1) << 32 | context->readIntReg(INTREG_R0); gdbregs.regs[REG_R0 + 1] = context->readIntReg(INTREG_R3) << 32 | context->readIntReg(INTREG_R2); gdbregs.regs[REG_R0 + 2] = context->readIntReg(INTREG_R5) << 32 | context->readIntReg(INTREG_R4); gdbregs.regs[REG_R0 + 3] = context->readIntReg(INTREG_R7) << 32 | context->readIntReg(INTREG_R6); gdbregs.regs[REG_R0 + 4] = context->readIntReg(INTREG_R9) << 32 | context->readIntReg(INTREG_R8); gdbregs.regs[REG_R0 + 5] = context->readIntReg(INTREG_R11) << 32| context->readIntReg(INTREG_R10); gdbregs.regs[REG_R0 + 6] = context->readIntReg(INTREG_SP) << 32 | context->readIntReg(INTREG_R12); gdbregs.regs[REG_R0 + 7] = context->pcState().pc() << 32 | context->readIntReg(INTREG_LR); // CPSR gdbregs.regs[REG_CPSR] = context->readMiscRegNoEffect(MISCREG_CPSR); // vfpv3/neon floating point registers (32 double or 64 float) gdbregs.regs[REG_F0] = static_cast(context->readFloatRegBits(0)) << 32 | gdbregs.regs[REG_CPSR]; for (int i = 1; i < (NumFloatArchRegs>>1); ++i) { gdbregs.regs[i + REG_F0] = static_cast(context->readFloatRegBits(2*i)) << 32 | context->readFloatRegBits(2*i-1); } // FPSCR gdbregs.regs[REG_FPSCR] = static_cast(context->readMiscRegNoEffect(MISCREG_FPSCR)) << 32 | context->readFloatRegBits(NumFloatArchRegs - 1); } /* * Translate the GDB register format into the kernel debugger register * format. */ void RemoteGDB::setregs() { DPRINTF(GDBAcc, "setregs in remotegdb \n"); // R0-R15 supervisor mode // arm registers are 32 bits wide, gdb registers are 64 bits wide // two arm registers are packed into one gdb register (little endian) context->setIntReg(INTREG_R0 , bits(gdbregs.regs[REG_R0 + 0], 31, 0)); context->setIntReg(INTREG_R1 , bits(gdbregs.regs[REG_R0 + 0], 63, 32)); context->setIntReg(INTREG_R2 , bits(gdbregs.regs[REG_R0 + 1], 31, 0)); context->setIntReg(INTREG_R3 , bits(gdbregs.regs[REG_R0 + 1], 63, 32)); context->setIntReg(INTREG_R4 , bits(gdbregs.regs[REG_R0 + 2], 31, 0)); context->setIntReg(INTREG_R5 , bits(gdbregs.regs[REG_R0 + 2], 63, 32)); context->setIntReg(INTREG_R6 , bits(gdbregs.regs[REG_R0 + 3], 31, 0)); context->setIntReg(INTREG_R7 , bits(gdbregs.regs[REG_R0 + 3], 63, 32)); context->setIntReg(INTREG_R8 , bits(gdbregs.regs[REG_R0 + 4], 31, 0)); context->setIntReg(INTREG_R9 , bits(gdbregs.regs[REG_R0 + 4], 63, 32)); context->setIntReg(INTREG_R10, bits(gdbregs.regs[REG_R0 + 5], 31, 0)); context->setIntReg(INTREG_R11, bits(gdbregs.regs[REG_R0 + 5], 63, 32)); context->setIntReg(INTREG_R12, bits(gdbregs.regs[REG_R0 + 6], 31, 0)); context->setIntReg(INTREG_SP , bits(gdbregs.regs[REG_R0 + 6], 63, 32)); context->setIntReg(INTREG_LR , bits(gdbregs.regs[REG_R0 + 7], 31, 0)); context->pcState(bits(gdbregs.regs[REG_R0 + 7], 63, 32)); //CPSR context->setMiscRegNoEffect(MISCREG_CPSR, gdbregs.regs[REG_CPSR]); //vfpv3/neon floating point registers (32 double or 64 float) context->setFloatRegBits(0, gdbregs.regs[REG_F0]>>32); for (int i = 1; i < NumFloatArchRegs; ++i) { if(i%2){ int j = (i+1)/2; context->setFloatRegBits(i, bits(gdbregs.regs[j + REG_F0], 31, 0)); } else{ int j = i/2; context->setFloatRegBits(i, gdbregs.regs[j + REG_F0]>>32); } } //FPSCR context->setMiscRegNoEffect(MISCREG_FPSCR, gdbregs.regs[REG_FPSCR]>>32); } 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) { return BaseRemoteGDB::write(vaddr, size, data); }