/*
* Copyright 2014 Google Inc.
* Copyright (c) 2010, 2013 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 <sys/signal.h>
#include <unistd.h>
#include <string>
#include "arch/arm/decoder.hh"
#include "arch/arm/pagetable.hh"
#include "arch/arm/registers.hh"
#include "arch/arm/remote_gdb.hh"
#include "arch/arm/system.hh"
#include "arch/arm/utility.hh"
#include "arch/arm/vtophys.hh"
#include "base/chunk_generator.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 "debug/GDBAcc.hh"
#include "debug/GDBMisc.hh"
#include "mem/page_table.hh"
#include "mem/physical.hh"
#include "mem/port.hh"
#include "sim/full_system.hh"
#include "sim/system.hh"
using namespace std;
using namespace ArmISA;
RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
: BaseRemoteGDB(_system, tc, GDB_REG_BYTES)
{
}
/*
* Determine if the mapping at va..(va+len) is valid.
*/
bool
RemoteGDB::acc(Addr va, size_t len)
{
if (FullSystem) {
for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
if (!virtvalid(context, gen.addr())) {
DPRINTF(GDBAcc, "acc: %#x mapping is invalid\n", va);
return false;
}
}
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;
}
}
/*
* 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());
if (inAArch64(context)) { // AArch64
// x0-x30
for (int i = 0; i < 31; ++i)
gdbregs.regs64[GDB64_X0 + i] = context->readIntReg(INTREG_X0 + i);
gdbregs.regs64[GDB64_SPX] = context->readIntReg(INTREG_SPX);
// pc
gdbregs.regs64[GDB64_PC] = context->pcState().pc();
// cpsr
gdbregs.regs64[GDB64_CPSR] =
context->readMiscRegNoEffect(MISCREG_CPSR);
// v0-v31
for (int i = 0; i < 128; i += 4) {
int gdboff = GDB64_V0_32 + i;
gdbregs.regs32[gdboff + 0] = context->readFloatRegBits(i + 2);
gdbregs.regs32[gdboff + 1] = context->readFloatRegBits(i + 3);
gdbregs.regs32[gdboff + 2] = context->readFloatRegBits(i + 0);
gdbregs.regs32[gdboff + 3] = context->readFloatRegBits(i + 1);
}
} else { // AArch32
// R0-R15 supervisor mode
gdbregs.regs32[GDB32_R0 + 0] = context->readIntReg(INTREG_R0);
gdbregs.regs32[GDB32_R0 + 1] = context->readIntReg(INTREG_R1);
gdbregs.regs32[GDB32_R0 + 2] = context->readIntReg(INTREG_R2);
gdbregs.regs32[GDB32_R0 + 3] = context->readIntReg(INTREG_R3);
gdbregs.regs32[GDB32_R0 + 4] = context->readIntReg(INTREG_R4);
gdbregs.regs32[GDB32_R0 + 5] = context->readIntReg(INTREG_R5);
gdbregs.regs32[GDB32_R0 + 6] = context->readIntReg(INTREG_R6);
gdbregs.regs32[GDB32_R0 + 7] = context->readIntReg(INTREG_R7);
gdbregs.regs32[GDB32_R0 + 8] = context->readIntReg(INTREG_R8);
gdbregs.regs32[GDB32_R0 + 9] = context->readIntReg(INTREG_R9);
gdbregs.regs32[GDB32_R0 + 10] = context->readIntReg(INTREG_R10);
gdbregs.regs32[GDB32_R0 + 11] = context->readIntReg(INTREG_R11);
gdbregs.regs32[GDB32_R0 + 12] = context->readIntReg(INTREG_R12);
gdbregs.regs32[GDB32_R0 + 13] = context->readIntReg(INTREG_SP);
gdbregs.regs32[GDB32_R0 + 14] = context->readIntReg(INTREG_LR);
gdbregs.regs32[GDB32_R0 + 15] = context->pcState().pc();
// CPSR
gdbregs.regs32[GDB32_CPSR] = context->readMiscRegNoEffect(MISCREG_CPSR);
// vfpv3/neon floating point registers (32 double or 64 float)
for (int i = 0; i < NumFloatV7ArchRegs; ++i)
gdbregs.regs32[GDB32_F0 + i] = context->readFloatRegBits(i);
// FPSCR
gdbregs.regs32[GDB32_FPSCR] =
context->readMiscRegNoEffect(MISCREG_FPSCR);
}
}
/*
* Translate the GDB register format into the kernel debugger register
* format.
*/
void
RemoteGDB::setregs()
{
DPRINTF(GDBAcc, "setregs in remotegdb \n");
if (inAArch64(context)) { // AArch64
// x0-x30
for (int i = 0; i < 31; ++i)
context->setIntReg(INTREG_X0 + i, gdbregs.regs64[GDB64_X0 + i]);
// pc
context->pcState(gdbregs.regs64[GDB64_PC]);
// cpsr
context->setMiscRegNoEffect(MISCREG_CPSR, gdbregs.regs64[GDB64_CPSR]);
// Update the stack pointer. This should be done after
// updating CPSR/PSTATE since that might affect how SPX gets
// mapped.
context->setIntReg(INTREG_SPX, gdbregs.regs64[GDB64_SPX]);
// v0-v31
for (int i = 0; i < 128; i += 4) {
int gdboff = GDB64_V0_32 + i;
context->setFloatRegBits(i + 2, gdbregs.regs32[gdboff + 0]);
context->setFloatRegBits(i + 3, gdbregs.regs32[gdboff + 1]);
context->setFloatRegBits(i + 0, gdbregs.regs32[gdboff + 2]);
context->setFloatRegBits(i + 1, gdbregs.regs32[gdboff + 3]);
}
} else { // AArch32
// 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, gdbregs.regs32[GDB32_R0 + 0]);
context->setIntReg(INTREG_R1, gdbregs.regs32[GDB32_R0 + 1]);
context->setIntReg(INTREG_R2, gdbregs.regs32[GDB32_R0 + 2]);
context->setIntReg(INTREG_R3, gdbregs.regs32[GDB32_R0 + 3]);
context->setIntReg(INTREG_R4, gdbregs.regs32[GDB32_R0 + 4]);
context->setIntReg(INTREG_R5, gdbregs.regs32[GDB32_R0 + 5]);
context->setIntReg(INTREG_R6, gdbregs.regs32[GDB32_R0 + 6]);
context->setIntReg(INTREG_R7, gdbregs.regs32[GDB32_R0 + 7]);
context->setIntReg(INTREG_R8, gdbregs.regs32[GDB32_R0 + 8]);
context->setIntReg(INTREG_R9, gdbregs.regs32[GDB32_R0 + 9]);
context->setIntReg(INTREG_R10, gdbregs.regs32[GDB32_R0 + 10]);
context->setIntReg(INTREG_R11, gdbregs.regs32[GDB32_R0 + 11]);
context->setIntReg(INTREG_R12, gdbregs.regs32[GDB32_R0 + 12]);
context->setIntReg(INTREG_SP, gdbregs.regs32[GDB32_R0 + 13]);
context->setIntReg(INTREG_LR, gdbregs.regs32[GDB32_R0 + 14]);
context->pcState(gdbregs.regs32[GDB32_R0 + 7]);
//CPSR
context->setMiscRegNoEffect(MISCREG_CPSR, gdbregs.regs32[GDB32_CPSR]);
//vfpv3/neon floating point registers (32 double or 64 float)
for (int i = 0; i < NumFloatV7ArchRegs; ++i)
context->setFloatRegBits(i, gdbregs.regs32[GDB32_F0 + i]);
//FPSCR
context->setMiscReg(MISCREG_FPSCR, gdbregs.regs32[GDB32_FPSCR]);
}
}
// 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);
}