1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 107 unchanged lines hidden (view full) ---

116 * "Stub" to allow remote cpu to debug over a serial line using gdb.
117 */
118
119#include <sys/signal.h>
120#include <unistd.h>
121
122#include <string>
123
124
125#include "arch/alpha/kgdb.h"
126#include "arch/alpha/regredir.hh"
127#include "arch/alpha/remote_gdb.hh"
128#include "arch/alpha/utility.hh"
129#include "arch/alpha/vtophys.hh"
130#include "base/intmath.hh"
131#include "base/remote_gdb.hh"
132#include "base/socket.hh"
133#include "base/trace.hh"
134#include "cpu/decode.hh"
135#include "cpu/static_inst.hh"
136#include "cpu/thread_context.hh"
137#include "debug/GDBAcc.hh"
138#include "debug/GDBMisc.hh"
139#include "mem/physical.hh"
140#include "mem/port.hh"
141#include "sim/system.hh"
142#include "sim/full_system.hh"
143
144using namespace std;
145using namespace AlphaISA;
146
147RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
148 : BaseRemoteGDB(_system, tc, KGDB_NUMREGS)
149{
150 memset(gdbregs.regs, 0, gdbregs.bytes());
151}
152
153/*
154 * Determine if the mapping at va..(va+len) is valid.
155 */
156bool
157RemoteGDB::acc(Addr va, size_t len)
158{
159 if (FullSystem) {
160 Addr last_va;
161
162 va = TruncPage(va);
163 last_va = RoundPage(va + len);
164
165 do {
166 if (IsK0Seg(va)) {
167 if (va < (K0SegBase + pmem->size())) {
168 DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= "
169 "%#x < K0SEG + size\n", va);
170 return true;
171 } else {
172 DPRINTF(GDBAcc, "acc: Mapping invalid %#x "
173 "> K0SEG + size\n", va);
174 return false;
175 }
176 }
177
178 /**
179 * This code says that all accesses to palcode (instruction
180 * and data) are valid since there isn't a va->pa mapping
181 * because palcode is accessed physically. At some point this
182 * should probably be cleaned up but there is no easy way to
183 * do it.
184 */
185
186 if (PcPAL(va) || va < 0x10000)
187 return true;
188
189 Addr ptbr = context->readMiscRegNoEffect(IPR_PALtemp20);
190 PageTableEntry pte =
191 kernel_pte_lookup(context->getPhysPort(), ptbr, va);
192 if (!pte.valid()) {
193 DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va);
194 return false;
195 }
196 va += PageBytes;
197 } while (va < last_va);
198
199 DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
200 return true;
201 } else {
202 panic("acc function needs to be rewritten for SE mode\n");
203 }
204}
205
206/*
207 * Translate the kernel debugger register format into the GDB register
208 * format.
209 */
210void
211RemoteGDB::getregs()

--- 95 unchanged lines hidden (view full) ---

307 alpha_pal_imb();
308#endif
309 return true;
310 } else {
311 return false;
312 }
313}
314