1/*
2 * Copyright 2015 LabWare
3 * Copyright 2014 Google, Inc.
4 * Copyright (c) 2007 The Hewlett-Packard Development Company
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 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions are
18 * met: redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer;
20 * redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution;
23 * neither the name of the copyright holders nor the names of its
24 * contributors may be used to endorse or promote products derived from
25 * this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 *
39 * Authors: Gabe Black
40 * Boris Shingarov
41 */
42
43#include <sys/signal.h>
44#include <unistd.h>
45
46#include <string>
47
48#include "arch/x86/regs/int.hh"
49#include "arch/x86/regs/misc.hh"
50#include "arch/x86/pagetable_walker.hh"
51#include "arch/x86/process.hh"
52#include "arch/x86/remote_gdb.hh"
53#include "arch/vtophys.hh"
54#include "base/remote_gdb.hh"
55#include "base/socket.hh"
56#include "base/trace.hh"
57#include "cpu/base.hh"
58#include "cpu/thread_context.hh"
59#include "debug/GDBAcc.hh"
60#include "mem/page_table.hh"
61#include "sim/full_system.hh"
62
63using namespace std;
64using namespace X86ISA;
65
66RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) :
67 BaseRemoteGDB(_system, c)
68{}
69
70bool
71RemoteGDB::acc(Addr va, size_t len)
72{
73 if (FullSystem) {
74 Walker *walker = context->getDTBPtr()->getWalker();
75 unsigned logBytes;
76 Fault fault = walker->startFunctional(context, va, logBytes,
77 BaseTLB::Read);
78 if (fault != NoFault)
79 return false;
80
81 Addr endVa = va + len - 1;
82 if ((va & ~mask(logBytes)) == (endVa & ~mask(logBytes)))
83 return true;
84
85 fault = walker->startFunctional(context, endVa, logBytes,
86 BaseTLB::Read);
87 return fault == NoFault;
88 } else {
89 TlbEntry entry;
90 return context->getProcessPtr()->pTable->lookup(va, entry);
91 }
92}
93
94RemoteGDB::BaseGdbRegCache*
95RemoteGDB::gdbRegs()
96{
97 HandyM5Reg m5reg = context->readMiscRegNoEffect(MISCREG_M5_REG);
98 if (m5reg.submode == SixtyFourBitMode)
99 return new AMD64GdbRegCache(this);
100 else
101 return new X86GdbRegCache(this);
102}
103
104
105
106void
107RemoteGDB::AMD64GdbRegCache::getRegs(ThreadContext *context)
108{
109 DPRINTF(GDBAcc, "getRegs in remotegdb \n");
110 r.rax = context->readIntReg(INTREG_RAX);
111 r.rbx = context->readIntReg(INTREG_RBX);
112 r.rcx = context->readIntReg(INTREG_RCX);
113 r.rdx = context->readIntReg(INTREG_RDX);
114 r.rsi = context->readIntReg(INTREG_RSI);
115 r.rdi = context->readIntReg(INTREG_RDI);
116 r.rbp = context->readIntReg(INTREG_RBP);
117 r.rsp = context->readIntReg(INTREG_RSP);
118 r.r8 = context->readIntReg(INTREG_R8);
119 r.r9 = context->readIntReg(INTREG_R9);
120 r.r10 = context->readIntReg(INTREG_R10);
121 r.r11 = context->readIntReg(INTREG_R11);
122 r.r12 = context->readIntReg(INTREG_R12);
123 r.r13 = context->readIntReg(INTREG_R13);
124 r.r14 = context->readIntReg(INTREG_R14);
125 r.r15 = context->readIntReg(INTREG_R15);
126 r.rip = context->pcState().pc();
127 r.eflags = context->readMiscRegNoEffect(MISCREG_RFLAGS);
128 r.cs = context->readMiscRegNoEffect(MISCREG_CS);
129 r.ss = context->readMiscRegNoEffect(MISCREG_SS);
130 r.ds = context->readMiscRegNoEffect(MISCREG_DS);
131 r.es = context->readMiscRegNoEffect(MISCREG_ES);
132 r.fs = context->readMiscRegNoEffect(MISCREG_FS);
133 r.gs = context->readMiscRegNoEffect(MISCREG_GS);
134}
135
136void
137RemoteGDB::X86GdbRegCache::getRegs(ThreadContext *context)
138{
139 DPRINTF(GDBAcc, "getRegs in remotegdb \n");
140 r.eax = context->readIntReg(INTREG_RAX);
141 r.ecx = context->readIntReg(INTREG_RCX);
142 r.edx = context->readIntReg(INTREG_RDX);
143 r.ebx = context->readIntReg(INTREG_RBX);
144 r.esp = context->readIntReg(INTREG_RSP);
145 r.ebp = context->readIntReg(INTREG_RBP);
146 r.esi = context->readIntReg(INTREG_RSI);
147 r.edi = context->readIntReg(INTREG_RDI);
148 r.eip = context->pcState().pc();
149 r.eflags = context->readMiscRegNoEffect(MISCREG_RFLAGS);
150 r.cs = context->readMiscRegNoEffect(MISCREG_CS);
151 r.ss = context->readMiscRegNoEffect(MISCREG_SS);
152 r.ds = context->readMiscRegNoEffect(MISCREG_DS);
153 r.es = context->readMiscRegNoEffect(MISCREG_ES);
154 r.fs = context->readMiscRegNoEffect(MISCREG_FS);
155 r.gs = context->readMiscRegNoEffect(MISCREG_GS);
156}
157
158void
159RemoteGDB::AMD64GdbRegCache::setRegs(ThreadContext *context) const
160{
161 DPRINTF(GDBAcc, "setRegs in remotegdb \n");
162 context->setIntReg(INTREG_RAX, r.rax);
163 context->setIntReg(INTREG_RBX, r.rbx);
164 context->setIntReg(INTREG_RCX, r.rcx);
165 context->setIntReg(INTREG_RDX, r.rdx);
166 context->setIntReg(INTREG_RSI, r.rsi);
167 context->setIntReg(INTREG_RDI, r.rdi);
168 context->setIntReg(INTREG_RBP, r.rbp);
169 context->setIntReg(INTREG_RSP, r.rsp);
170 context->setIntReg(INTREG_R8, r.r8);
171 context->setIntReg(INTREG_R9, r.r9);
172 context->setIntReg(INTREG_R10, r.r10);
173 context->setIntReg(INTREG_R11, r.r11);
174 context->setIntReg(INTREG_R12, r.r12);
175 context->setIntReg(INTREG_R13, r.r13);
176 context->setIntReg(INTREG_R14, r.r14);
177 context->setIntReg(INTREG_R15, r.r15);
178 context->pcState(r.rip);
179 context->setMiscReg(MISCREG_RFLAGS, r.eflags);
180 if (r.cs != context->readMiscRegNoEffect(MISCREG_CS))
181 warn("Remote gdb: Ignoring update to CS.\n");
182 if (r.ss != context->readMiscRegNoEffect(MISCREG_SS))
183 warn("Remote gdb: Ignoring update to SS.\n");
184 if (r.ds != context->readMiscRegNoEffect(MISCREG_DS))
185 warn("Remote gdb: Ignoring update to DS.\n");
186 if (r.es != context->readMiscRegNoEffect(MISCREG_ES))
187 warn("Remote gdb: Ignoring update to ES.\n");
188 if (r.fs != context->readMiscRegNoEffect(MISCREG_FS))
189 warn("Remote gdb: Ignoring update to FS.\n");
190 if (r.gs != context->readMiscRegNoEffect(MISCREG_GS))
191 warn("Remote gdb: Ignoring update to GS.\n");
192}
193
194void
195RemoteGDB::X86GdbRegCache::setRegs(ThreadContext *context) const
196{
197 DPRINTF(GDBAcc, "setRegs in remotegdb \n");
198 context->setIntReg(INTREG_RAX, r.eax);
199 context->setIntReg(INTREG_RCX, r.ecx);
200 context->setIntReg(INTREG_RDX, r.edx);
201 context->setIntReg(INTREG_RBX, r.ebx);
202 context->setIntReg(INTREG_RSP, r.esp);
203 context->setIntReg(INTREG_RBP, r.ebp);
204 context->setIntReg(INTREG_RSI, r.esi);
205 context->setIntReg(INTREG_RDI, r.edi);
206 context->pcState(r.eip);
207 context->setMiscReg(MISCREG_RFLAGS, r.eflags);
208 if (r.cs != context->readMiscRegNoEffect(MISCREG_CS))
209 warn("Remote gdb: Ignoring update to CS.\n");
210 if (r.ss != context->readMiscRegNoEffect(MISCREG_SS))
211 warn("Remote gdb: Ignoring update to SS.\n");
212 if (r.ds != context->readMiscRegNoEffect(MISCREG_DS))
213 warn("Remote gdb: Ignoring update to DS.\n");
214 if (r.es != context->readMiscRegNoEffect(MISCREG_ES))
215 warn("Remote gdb: Ignoring update to ES.\n");
216 if (r.fs != context->readMiscRegNoEffect(MISCREG_FS))
217 warn("Remote gdb: Ignoring update to FS.\n");
218 if (r.gs != context->readMiscRegNoEffect(MISCREG_GS))
219 warn("Remote gdb: Ignoring update to GS.\n");
220}