remote_gdb.cc revision 12109
1/*
2 * Copyright 2015 LabWare
3 * Copyright 2014 Google Inc.
4 * Copyright (c) 2010, 2013, 2016 ARM Limited
5 * All rights reserved
6 *
7 * The license below extends only to copyright in the software and shall
8 * not be construed as granting a license to any other intellectual
9 * property including but not limited to intellectual property relating
10 * to a hardware implementation of the functionality of the software
11 * licensed hereunder.  You may use the software subject to the license
12 * terms below provided that you ensure that this notice is replicated
13 * unmodified and in its entirety in all distributions of the software,
14 * modified or unmodified, in source code or in binary form.
15 *
16 * Copyright (c) 2002-2005 The Regents of The University of Michigan
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are
21 * met: redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer;
23 * redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution;
26 * neither the name of the copyright holders nor the names of its
27 * contributors may be used to endorse or promote products derived from
28 * this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 * Authors: Nathan Binkert
43 *          William Wang
44 *          Boris Shingarov
45 */
46
47/*
48 * Copyright (c) 1990, 1993 The Regents of the University of California
49 * All rights reserved
50 *
51 * This software was developed by the Computer Systems Engineering group
52 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
53 * contributed to Berkeley.
54 *
55 * All advertising materials mentioning features or use of this software
56 * must display the following acknowledgement:
57 *      This product includes software developed by the University of
58 *      California, Lawrence Berkeley Laboratories.
59 *
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
62 * are met:
63 * 1. Redistributions of source code must retain the above copyright
64 *    notice, this list of conditions and the following disclaimer.
65 * 2. Redistributions in binary form must reproduce the above copyright
66 *    notice, this list of conditions and the following disclaimer in the
67 *    documentation and/or other materials provided with the distribution.
68 * 3. All advertising materials mentioning features or use of this software
69 *    must display the following acknowledgement:
70 *      This product includes software developed by the University of
71 *      California, Berkeley and its contributors.
72 * 4. Neither the name of the University nor the names of its contributors
73 *    may be used to endorse or promote products derived from this software
74 *    without specific prior written permission.
75 *
76 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
77 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
79 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
82 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
83 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
84 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
85 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
86 * SUCH DAMAGE.
87 *
88 *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
89 */
90
91/*-
92 * Copyright (c) 2001 The NetBSD Foundation, Inc.
93 * All rights reserved.
94 *
95 * This code is derived from software contributed to The NetBSD Foundation
96 * by Jason R. Thorpe.
97 *
98 * Redistribution and use in source and binary forms, with or without
99 * modification, are permitted provided that the following conditions
100 * are met:
101 * 1. Redistributions of source code must retain the above copyright
102 *    notice, this list of conditions and the following disclaimer.
103 * 2. Redistributions in binary form must reproduce the above copyright
104 *    notice, this list of conditions and the following disclaimer in the
105 *    documentation and/or other materials provided with the distribution.
106 * 3. All advertising materials mentioning features or use of this software
107 *    must display the following acknowledgement:
108 *      This product includes software developed by the NetBSD
109 *      Foundation, Inc. and its contributors.
110 * 4. Neither the name of The NetBSD Foundation nor the names of its
111 *    contributors may be used to endorse or promote products derived
112 *    from this software without specific prior written permission.
113 *
114 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
115 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
116 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
117 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
118 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
119 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
120 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
121 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
122 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
123 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
124 * POSSIBILITY OF SUCH DAMAGE.
125 */
126
127/*
128 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
129 *
130 * Taken from NetBSD
131 *
132 * "Stub" to allow remote cpu to debug over a serial line using gdb.
133 */
134
135#include "arch/arm/remote_gdb.hh"
136
137#include <sys/signal.h>
138#include <unistd.h>
139
140#include <string>
141
142#include "arch/arm/decoder.hh"
143#include "arch/arm/pagetable.hh"
144#include "arch/arm/registers.hh"
145#include "arch/arm/system.hh"
146#include "arch/arm/utility.hh"
147#include "arch/arm/vtophys.hh"
148#include "base/chunk_generator.hh"
149#include "base/intmath.hh"
150#include "base/remote_gdb.hh"
151#include "base/socket.hh"
152#include "base/trace.hh"
153#include "cpu/static_inst.hh"
154#include "cpu/thread_context.hh"
155#include "cpu/thread_state.hh"
156#include "debug/GDBAcc.hh"
157#include "debug/GDBMisc.hh"
158#include "mem/page_table.hh"
159#include "mem/physical.hh"
160#include "mem/port.hh"
161#include "sim/full_system.hh"
162#include "sim/system.hh"
163
164using namespace std;
165using namespace ArmISA;
166
167RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
168    : BaseRemoteGDB(_system, tc), regCache32(this), regCache64(this)
169{
170}
171
172/*
173 * Determine if the mapping at va..(va+len) is valid.
174 */
175bool
176RemoteGDB::acc(Addr va, size_t len)
177{
178    if (FullSystem) {
179        for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
180            if (!virtvalid(context, gen.addr())) {
181                DPRINTF(GDBAcc, "acc:   %#x mapping is invalid\n", va);
182                return false;
183            }
184        }
185
186        DPRINTF(GDBAcc, "acc:   %#x mapping is valid\n", va);
187        return true;
188    } else {
189        TlbEntry entry;
190        //Check to make sure the first byte is mapped into the processes address
191        //space.
192        if (context->getProcessPtr()->pTable->lookup(va, entry))
193            return true;
194        return false;
195    }
196}
197
198void
199RemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context)
200{
201    DPRINTF(GDBAcc, "getRegs in remotegdb \n");
202
203    for (int i = 0; i < 31; ++i)
204        r.x[i] = context->readIntReg(INTREG_X0 + i);
205    r.spx = context->readIntReg(INTREG_SPX);
206    r.pc = context->pcState().pc();
207    r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
208
209    for (int i = 0; i < 32*4; i += 4) {
210        r.v[i + 0] = context->readFloatRegBits(i + 2);
211        r.v[i + 1] = context->readFloatRegBits(i + 3);
212        r.v[i + 2] = context->readFloatRegBits(i + 0);
213        r.v[i + 3] = context->readFloatRegBits(i + 1);
214    }
215
216    for (int i = 0; i < 32; i ++) {
217        r.vec[i] = context->readVecReg(RegId(VecRegClass,i));
218    }
219}
220
221void
222RemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
223{
224    DPRINTF(GDBAcc, "setRegs in remotegdb \n");
225
226    for (int i = 0; i < 31; ++i)
227        context->setIntReg(INTREG_X0 + i, r.x[i]);
228    context->pcState(r.pc);
229    context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
230    // Update the stack pointer. This should be done after
231    // updating CPSR/PSTATE since that might affect how SPX gets
232    // mapped.
233    context->setIntReg(INTREG_SPX, r.spx);
234
235    for (int i = 0; i < 32*4; i += 4) {
236        context->setFloatRegBits(i + 2, r.v[i + 0]);
237        context->setFloatRegBits(i + 3, r.v[i + 1]);
238        context->setFloatRegBits(i + 0, r.v[i + 2]);
239        context->setFloatRegBits(i + 1, r.v[i + 3]);
240    }
241
242    for (int i = 0; i < 32; i ++) {
243        context->setVecReg(RegId(VecRegClass, i), r.vec[i]);
244    }
245}
246
247void
248RemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context)
249{
250    DPRINTF(GDBAcc, "getRegs in remotegdb \n");
251
252    r.gpr[0] = context->readIntReg(INTREG_R0);
253    r.gpr[1] = context->readIntReg(INTREG_R1);
254    r.gpr[2] = context->readIntReg(INTREG_R2);
255    r.gpr[3] = context->readIntReg(INTREG_R3);
256    r.gpr[4] = context->readIntReg(INTREG_R4);
257    r.gpr[5] = context->readIntReg(INTREG_R5);
258    r.gpr[6] = context->readIntReg(INTREG_R6);
259    r.gpr[7] = context->readIntReg(INTREG_R7);
260    r.gpr[8] = context->readIntReg(INTREG_R8);
261    r.gpr[9] = context->readIntReg(INTREG_R9);
262    r.gpr[10] = context->readIntReg(INTREG_R10);
263    r.gpr[11] = context->readIntReg(INTREG_R11);
264    r.gpr[12] = context->readIntReg(INTREG_R12);
265    r.gpr[13] = context->readIntReg(INTREG_SP);
266    r.gpr[14] = context->readIntReg(INTREG_LR);
267    r.gpr[15] = context->pcState().pc();
268
269    // One day somebody will implement transfer of FPRs correctly.
270    for (int i=0; i<8*3; i++) r.fpr[i] = 0;
271
272    r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR);
273    r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
274}
275
276void
277RemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const
278{
279    DPRINTF(GDBAcc, "setRegs in remotegdb \n");
280
281    context->setIntReg(INTREG_R0, r.gpr[0]);
282    context->setIntReg(INTREG_R1, r.gpr[1]);
283    context->setIntReg(INTREG_R2, r.gpr[2]);
284    context->setIntReg(INTREG_R3, r.gpr[3]);
285    context->setIntReg(INTREG_R4, r.gpr[4]);
286    context->setIntReg(INTREG_R5, r.gpr[5]);
287    context->setIntReg(INTREG_R6, r.gpr[6]);
288    context->setIntReg(INTREG_R7, r.gpr[7]);
289    context->setIntReg(INTREG_R8, r.gpr[8]);
290    context->setIntReg(INTREG_R9, r.gpr[9]);
291    context->setIntReg(INTREG_R10, r.gpr[10]);
292    context->setIntReg(INTREG_R11, r.gpr[11]);
293    context->setIntReg(INTREG_R12, r.gpr[12]);
294    context->setIntReg(INTREG_SP, r.gpr[13]);
295    context->setIntReg(INTREG_LR, r.gpr[14]);
296    context->pcState(r.gpr[15]);
297
298    // One day somebody will implement transfer of FPRs correctly.
299
300    context->setMiscReg(MISCREG_FPSCR, r.fpscr);
301    context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
302}
303
304RemoteGDB::BaseGdbRegCache*
305RemoteGDB::gdbRegs()
306{
307    if (inAArch64(context))
308        return &regCache32;
309    else
310        return &regCache64;
311}
312