2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Nathan Binkert
32 * Copyright (c) 1990, 1993
33 * The Regents of the University of California. All rights reserved.
35 * This software was developed by the Computer Systems Engineering group
36 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
37 * contributed to Berkeley.
39 * All advertising materials mentioning features or use of this software
40 * must display the following acknowledgement:
41 * This product includes software developed by the University of
42 * California, Lawrence Berkeley Laboratories.
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 * must display the following acknowledgement:
54 * This product includes software developed by the University of
55 * California, Berkeley and its contributors.
56 * 4. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
76 * Copyright (c) 2001 The NetBSD Foundation, Inc.
77 * All rights reserved.
79 * This code is derived from software contributed to The NetBSD Foundation
82 * Redistribution and use in source and binary forms, with or without
83 * modification, are permitted provided that the following conditions
85 * 1. Redistributions of source code must retain the above copyright
86 * notice, this list of conditions and the following disclaimer.
87 * 2. Redistributions in binary form must reproduce the above copyright
88 * notice, this list of conditions and the following disclaimer in the
89 * documentation and/or other materials provided with the distribution.
90 * 3. All advertising materials mentioning features or use of this software
91 * must display the following acknowledgement:
92 * This product includes software developed by the NetBSD
93 * Foundation, Inc. and its contributors.
94 * 4. Neither the name of The NetBSD Foundation nor the names of its
95 * contributors may be used to endorse or promote products derived
96 * from this software without specific prior written permission.
98 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
99 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
100 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
101 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
102 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
103 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
104 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
105 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
106 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
107 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
108 * POSSIBILITY OF SUCH DAMAGE.
112 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
116 * "Stub" to allow remote cpu to debug over a serial line using gdb.
119 #include <sys/signal.h>
124 #include "config/full_system.hh"
126 #include "arch/alpha/vtophys.hh"
129 #include "arch/alpha/kgdb.h"
130 #include "arch/alpha/utility.hh"
131 #include "arch/alpha/regredir.hh"
132 #include "arch/alpha/remote_gdb.hh"
133 #include "base/intmath.hh"
134 #include "base/remote_gdb.hh"
135 #include "base/socket.hh"
136 #include "base/trace.hh"
137 #include "cpu/thread_context.hh"
138 #include "cpu/static_inst.hh"
139 #include "mem/physical.hh"
140 #include "mem/port.hh"
141 #include "sim/system.hh"
144 using namespace AlphaISA
;
146 RemoteGDB::RemoteGDB(System
*_system
, ThreadContext
*tc
)
147 : BaseRemoteGDB(_system
, tc
, KGDB_NUMREGS
)
149 memset(gdbregs
.regs
, 0, gdbregs
.bytes());
153 * Determine if the mapping at va..(va+len) is valid.
156 RemoteGDB::acc(Addr va
, size_t len
)
159 panic("acc function needs to be rewritten for SE mode\n");
164 last_va
= RoundPage(va
+ len
);
168 if (va
< (K0SegBase
+ pmem
->size())) {
169 DPRINTF(GDBAcc
, "acc: Mapping is valid K0SEG <= "
170 "%#x < K0SEG + size\n", va
);
173 DPRINTF(GDBAcc
, "acc: Mapping invalid %#x > K0SEG + size\n",
180 * This code says that all accesses to palcode (instruction
181 * and data) are valid since there isn't a va->pa mapping
182 * because palcode is accessed physically. At some point this
183 * should probably be cleaned up but there is no easy way to
187 if (PcPAL(va
) || va
< 0x10000)
190 Addr ptbr
= context
->readMiscRegNoEffect(IPR_PALtemp20
);
192 kernel_pte_lookup(context
->getPhysPort(), ptbr
, va
);
194 DPRINTF(GDBAcc
, "acc: %#x pte is invalid\n", va
);
198 } while (va
< last_va
);
200 DPRINTF(GDBAcc
, "acc: %#x mapping is valid\n", va
);
206 * Translate the kernel debugger register format into the GDB register
212 memset(gdbregs
.regs
, 0, gdbregs
.bytes());
214 gdbregs
.regs
[KGDB_REG_PC
] = context
->readPC();
216 // @todo: Currently this is very Alpha specific.
217 if (PcPAL(gdbregs
.regs
[KGDB_REG_PC
])) {
218 for (int i
= 0; i
< NumIntArchRegs
; ++i
) {
219 gdbregs
.regs
[i
] = context
->readIntReg(reg_redir
[i
]);
222 for (int i
= 0; i
< NumIntArchRegs
; ++i
) {
223 gdbregs
.regs
[i
] = context
->readIntReg(i
);
228 for (int i
= 0; i
< NumFloatArchRegs
; ++i
) {
229 gdbregs
.regs
[i
+ KGDB_REG_F0
] = context
->readFloatRegBits(i
);
235 * Translate the GDB register format into the kernel debugger register
241 // @todo: Currently this is very Alpha specific.
242 if (PcPAL(gdbregs
.regs
[KGDB_REG_PC
])) {
243 for (int i
= 0; i
< NumIntArchRegs
; ++i
) {
244 context
->setIntReg(reg_redir
[i
], gdbregs
.regs
[i
]);
247 for (int i
= 0; i
< NumIntArchRegs
; ++i
) {
248 context
->setIntReg(i
, gdbregs
.regs
[i
]);
253 for (int i
= 0; i
< NumFloatArchRegs
; ++i
) {
254 context
->setFloatRegBits(i
, gdbregs
.regs
[i
+ KGDB_REG_F0
]);
257 context
->setPC(gdbregs
.regs
[KGDB_REG_PC
]);
261 RemoteGDB::clearSingleStep()
263 DPRINTF(GDBMisc
, "clearSingleStep bt_addr=%#x nt_addr=%#x\n",
264 takenBkpt
, notTakenBkpt
);
267 clearTempBreakpoint(takenBkpt
);
269 if (notTakenBkpt
!= 0)
270 clearTempBreakpoint(notTakenBkpt
);
274 RemoteGDB::setSingleStep()
276 Addr pc
= context
->readPC();
280 npc
= pc
+ sizeof(MachInst
);
282 // User was stopped at pc, e.g. the instruction at pc was not
284 MachInst inst
= read
<MachInst
>(pc
);
285 StaticInstPtr
si(inst
, pc
);
286 if (si
->hasBranchTarget(pc
, context
, bpc
)) {
287 // Don't bother setting a breakpoint on the taken branch if it
288 // is the same as the next pc
293 DPRINTF(GDBMisc
, "setSingleStep bt_addr=%#x nt_addr=%#x\n",
294 takenBkpt
, notTakenBkpt
);
296 setTempBreakpoint(notTakenBkpt
= npc
);
299 setTempBreakpoint(takenBkpt
= bpc
);
302 // Write bytes to kernel address space for debugger.
304 RemoteGDB::write(Addr vaddr
, size_t size
, const char *data
)
306 if (BaseRemoteGDB::write(vaddr
, size
, data
)) {