1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 * William Wang
42 * Deyuan Guo
43 */
44
45/*
46 * Copyright (c) 1990, 1993 The Regents of the University of California
47 * All rights reserved
48 *
49 * This software was developed by the Computer Systems Engineering group
50 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
51 * contributed to Berkeley.
52 *
53 * All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by the University of
56 * California, Lawrence Berkeley Laboratories.
57 *
58 * Redistribution and use in source and binary forms, with or without
59 * modification, are permitted provided that the following conditions
60 * are met:
61 * 1. Redistributions of source code must retain the above copyright
62 * notice, this list of conditions and the following disclaimer.
63 * 2. Redistributions in binary form must reproduce the above copyright
64 * notice, this list of conditions and the following disclaimer in the
65 * documentation and/or other materials provided with the distribution.
66 * 3. All advertising materials mentioning features or use of this software
67 * must display the following acknowledgement:
68 * This product includes software developed by the University of
69 * California, Berkeley and its contributors.
70 * 4. Neither the name of the University nor the names of its contributors
71 * may be used to endorse or promote products derived from this software
72 * without specific prior written permission.
73 *
74 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
75 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
76 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
77 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
78 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
79 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
80 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
81 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
82 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
83 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
84 * SUCH DAMAGE.
85 *
86 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
87 */
88
89/*-
90 * Copyright (c) 2001 The NetBSD Foundation, Inc.
91 * All rights reserved.
92 *
93 * This code is derived from software contributed to The NetBSD Foundation
94 * by Jason R. Thorpe.
95 *
96 * Redistribution and use in source and binary forms, with or without
97 * modification, are permitted provided that the following conditions
98 * are met:
99 * 1. Redistributions of source code must retain the above copyright
100 * notice, this list of conditions and the following disclaimer.
101 * 2. Redistributions in binary form must reproduce the above copyright
102 * notice, this list of conditions and the following disclaimer in the
103 * documentation and/or other materials provided with the distribution.
104 * 3. All advertising materials mentioning features or use of this software
105 * must display the following acknowledgement:
106 * This product includes software developed by the NetBSD
107 * Foundation, Inc. and its contributors.
108 * 4. Neither the name of The NetBSD Foundation nor the names of its
109 * contributors may be used to endorse or promote products derived
110 * from this software without specific prior written permission.
111 *
112 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
113 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
114 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
115 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
116 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
117 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
118 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
119 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
120 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
121 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
122 * POSSIBILITY OF SUCH DAMAGE.
123 */
124
125/*
126 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
127 *
128 * Taken from NetBSD
129 *
130 * "Stub" to allow remote cpu to debug over a serial line using gdb.
131 */
132
133#include <sys/signal.h>
134#include <unistd.h>
135
136#include <string>
137
| 1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 * William Wang
42 * Deyuan Guo
43 */
44
45/*
46 * Copyright (c) 1990, 1993 The Regents of the University of California
47 * All rights reserved
48 *
49 * This software was developed by the Computer Systems Engineering group
50 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
51 * contributed to Berkeley.
52 *
53 * All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by the University of
56 * California, Lawrence Berkeley Laboratories.
57 *
58 * Redistribution and use in source and binary forms, with or without
59 * modification, are permitted provided that the following conditions
60 * are met:
61 * 1. Redistributions of source code must retain the above copyright
62 * notice, this list of conditions and the following disclaimer.
63 * 2. Redistributions in binary form must reproduce the above copyright
64 * notice, this list of conditions and the following disclaimer in the
65 * documentation and/or other materials provided with the distribution.
66 * 3. All advertising materials mentioning features or use of this software
67 * must display the following acknowledgement:
68 * This product includes software developed by the University of
69 * California, Berkeley and its contributors.
70 * 4. Neither the name of the University nor the names of its contributors
71 * may be used to endorse or promote products derived from this software
72 * without specific prior written permission.
73 *
74 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
75 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
76 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
77 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
78 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
79 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
80 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
81 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
82 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
83 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
84 * SUCH DAMAGE.
85 *
86 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
87 */
88
89/*-
90 * Copyright (c) 2001 The NetBSD Foundation, Inc.
91 * All rights reserved.
92 *
93 * This code is derived from software contributed to The NetBSD Foundation
94 * by Jason R. Thorpe.
95 *
96 * Redistribution and use in source and binary forms, with or without
97 * modification, are permitted provided that the following conditions
98 * are met:
99 * 1. Redistributions of source code must retain the above copyright
100 * notice, this list of conditions and the following disclaimer.
101 * 2. Redistributions in binary form must reproduce the above copyright
102 * notice, this list of conditions and the following disclaimer in the
103 * documentation and/or other materials provided with the distribution.
104 * 3. All advertising materials mentioning features or use of this software
105 * must display the following acknowledgement:
106 * This product includes software developed by the NetBSD
107 * Foundation, Inc. and its contributors.
108 * 4. Neither the name of The NetBSD Foundation nor the names of its
109 * contributors may be used to endorse or promote products derived
110 * from this software without specific prior written permission.
111 *
112 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
113 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
114 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
115 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
116 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
117 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
118 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
119 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
120 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
121 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
122 * POSSIBILITY OF SUCH DAMAGE.
123 */
124
125/*
126 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
127 *
128 * Taken from NetBSD
129 *
130 * "Stub" to allow remote cpu to debug over a serial line using gdb.
131 */
132
133#include <sys/signal.h>
134#include <unistd.h>
135
136#include <string>
137
|
141#include "cpu/thread_state.hh"
142#include "debug/GDBAcc.hh"
143#include "debug/GDBMisc.hh"
144#include "mem/page_table.hh"
145#include "sim/full_system.hh"
146
147using namespace std;
148using namespace MipsISA;
149
150RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
151 : BaseRemoteGDB(_system, tc, GdbNumRegs)
152{
153}
154
155/*
156 * Determine if the mapping at va..(va+len) is valid.
157 */
158bool
159RemoteGDB::acc(Addr va, size_t len)
160{
161 TlbEntry entry;
162 //Check to make sure the first byte is mapped into the processes address
163 //space.
164 if (FullSystem)
165 panic("acc not implemented for MIPS FS!");
166 else
167 return context->getProcessPtr()->pTable->lookup(va, entry);
168}
169
170/*
171 * Translate the kernel debugger register format into the GDB register
172 * format.
173 */
174void
175RemoteGDB::getregs()
176{
177 DPRINTF(GDBAcc, "getregs in remotegdb \n");
178 memset(gdbregs.regs, 0, gdbregs.bytes());
179
180 // MIPS registers are 32 bits wide, gdb registers are 64 bits wide
181 // two MIPS registers are packed into one gdb register (little endian)
182
183 // INTREG: R0~R31
184 for (int i = 0; i < GdbIntArchRegs; i++) {
185 gdbregs.regs[i] = pack(
186 context->readIntReg(i * 2),
187 context->readIntReg(i * 2 + 1));
188 }
189 // SR, LO, HI, BADVADDR, CAUSE, PC
190 gdbregs.regs[GdbIntArchRegs + 0] = pack(
191 context->readMiscRegNoEffect(MISCREG_STATUS),
192 context->readIntReg(INTREG_LO));
193 gdbregs.regs[GdbIntArchRegs + 1] = pack(
194 context->readIntReg(INTREG_HI),
195 context->readMiscRegNoEffect(MISCREG_BADVADDR));
196 gdbregs.regs[GdbIntArchRegs + 2] = pack(
197 context->readMiscRegNoEffect(MISCREG_CAUSE),
198 context->pcState().pc());
199 // FLOATREG: F0~F31
200 for (int i = 0; i < GdbFloatArchRegs; i++) {
201 gdbregs.regs[GdbIntRegs + i] = pack(
202 context->readFloatRegBits(i * 2),
203 context->readFloatRegBits(i * 2 + 1));
204 }
205 // FCR, FIR
206 gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0] = pack(
207 context->readFloatRegBits(FLOATREG_FCCR),
208 context->readFloatRegBits(FLOATREG_FIR));
209}
210
211/*
212 * Translate the GDB register format into the kernel debugger register
213 * format.
214 */
215void
216RemoteGDB::setregs()
217{
218 DPRINTF(GDBAcc, "setregs in remotegdb \n");
219
220 // MIPS registers are 32 bits wide, gdb registers are 64 bits wide
221 // two MIPS registers are packed into one gdb register (little endian)
222
223 // INTREG: R0~R31
224 for (int i = 0; i < GdbIntArchRegs; i++) {
225 if (i) context->setIntReg(i * 2,
226 unpackLo(gdbregs.regs[i]));
227 context->setIntReg(i * 2 + 1,
228 unpackHi(gdbregs.regs[i]));
229 }
230 // SR, LO, HI, BADVADDR, CAUSE, PC
231 context->setMiscRegNoEffect(MISCREG_STATUS,
232 unpackLo(gdbregs.regs[GdbIntArchRegs + 0]));
233 context->setIntReg(INTREG_LO,
234 unpackHi(gdbregs.regs[GdbIntArchRegs + 0]));
235 context->setIntReg(INTREG_HI,
236 unpackLo(gdbregs.regs[GdbIntArchRegs + 1]));
237 context->setMiscRegNoEffect(MISCREG_BADVADDR,
238 unpackHi(gdbregs.regs[GdbIntArchRegs + 1]));
239 context->setMiscRegNoEffect(MISCREG_CAUSE,
240 unpackLo(gdbregs.regs[GdbIntArchRegs + 2]));
241 context->pcState(
242 unpackHi(gdbregs.regs[GdbIntArchRegs + 2]));
243 // FLOATREG: F0~F31
244 for (int i = 0; i < GdbFloatArchRegs; i++) {
245 context->setFloatRegBits(i * 2,
246 unpackLo(gdbregs.regs[GdbIntRegs + i]));
247 context->setFloatRegBits(i * 2 + 1,
248 unpackHi(gdbregs.regs[GdbIntRegs + i]));
249 }
250 // FCR, FIR
251 context->setFloatRegBits(FLOATREG_FCCR,
252 unpackLo(gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0]));
253 context->setFloatRegBits(FLOATREG_FIR,
254 unpackHi(gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0]));
255}
256
257void
258RemoteGDB::clearSingleStep()
259{
260 DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n",
261 takenBkpt, notTakenBkpt);
262
263 if (takenBkpt != 0)
264 clearTempBreakpoint(takenBkpt);
265
266 if (notTakenBkpt != 0)
267 clearTempBreakpoint(notTakenBkpt);
268}
269
270void
271RemoteGDB::setSingleStep()
272{
273 PCState pc = context->pcState();
274 PCState bpc;
275 bool set_bt = false;
276
277 // User was stopped at pc, e.g. the instruction at pc was not
278 // executed.
279 MachInst inst = read<MachInst>(pc.pc());
280 StaticInstPtr si = context->getDecoderPtr()->decode(inst, pc.pc());
281 if (si->hasBranchTarget(pc, context, bpc)) {
282 // Don't bother setting a breakpoint on the taken branch if it
283 // is the same as the next npc
284 if (bpc.npc() != pc.nnpc())
285 set_bt = true;
286 }
287
288 DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n",
289 takenBkpt, notTakenBkpt);
290
291 notTakenBkpt = pc.nnpc();
292 setTempBreakpoint(notTakenBkpt);
293
294 if (set_bt) {
295 takenBkpt = bpc.npc();
296 setTempBreakpoint(takenBkpt);
297 }
298}
299
| 141#include "cpu/thread_state.hh"
142#include "debug/GDBAcc.hh"
143#include "debug/GDBMisc.hh"
144#include "mem/page_table.hh"
145#include "sim/full_system.hh"
146
147using namespace std;
148using namespace MipsISA;
149
150RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
151 : BaseRemoteGDB(_system, tc, GdbNumRegs)
152{
153}
154
155/*
156 * Determine if the mapping at va..(va+len) is valid.
157 */
158bool
159RemoteGDB::acc(Addr va, size_t len)
160{
161 TlbEntry entry;
162 //Check to make sure the first byte is mapped into the processes address
163 //space.
164 if (FullSystem)
165 panic("acc not implemented for MIPS FS!");
166 else
167 return context->getProcessPtr()->pTable->lookup(va, entry);
168}
169
170/*
171 * Translate the kernel debugger register format into the GDB register
172 * format.
173 */
174void
175RemoteGDB::getregs()
176{
177 DPRINTF(GDBAcc, "getregs in remotegdb \n");
178 memset(gdbregs.regs, 0, gdbregs.bytes());
179
180 // MIPS registers are 32 bits wide, gdb registers are 64 bits wide
181 // two MIPS registers are packed into one gdb register (little endian)
182
183 // INTREG: R0~R31
184 for (int i = 0; i < GdbIntArchRegs; i++) {
185 gdbregs.regs[i] = pack(
186 context->readIntReg(i * 2),
187 context->readIntReg(i * 2 + 1));
188 }
189 // SR, LO, HI, BADVADDR, CAUSE, PC
190 gdbregs.regs[GdbIntArchRegs + 0] = pack(
191 context->readMiscRegNoEffect(MISCREG_STATUS),
192 context->readIntReg(INTREG_LO));
193 gdbregs.regs[GdbIntArchRegs + 1] = pack(
194 context->readIntReg(INTREG_HI),
195 context->readMiscRegNoEffect(MISCREG_BADVADDR));
196 gdbregs.regs[GdbIntArchRegs + 2] = pack(
197 context->readMiscRegNoEffect(MISCREG_CAUSE),
198 context->pcState().pc());
199 // FLOATREG: F0~F31
200 for (int i = 0; i < GdbFloatArchRegs; i++) {
201 gdbregs.regs[GdbIntRegs + i] = pack(
202 context->readFloatRegBits(i * 2),
203 context->readFloatRegBits(i * 2 + 1));
204 }
205 // FCR, FIR
206 gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0] = pack(
207 context->readFloatRegBits(FLOATREG_FCCR),
208 context->readFloatRegBits(FLOATREG_FIR));
209}
210
211/*
212 * Translate the GDB register format into the kernel debugger register
213 * format.
214 */
215void
216RemoteGDB::setregs()
217{
218 DPRINTF(GDBAcc, "setregs in remotegdb \n");
219
220 // MIPS registers are 32 bits wide, gdb registers are 64 bits wide
221 // two MIPS registers are packed into one gdb register (little endian)
222
223 // INTREG: R0~R31
224 for (int i = 0; i < GdbIntArchRegs; i++) {
225 if (i) context->setIntReg(i * 2,
226 unpackLo(gdbregs.regs[i]));
227 context->setIntReg(i * 2 + 1,
228 unpackHi(gdbregs.regs[i]));
229 }
230 // SR, LO, HI, BADVADDR, CAUSE, PC
231 context->setMiscRegNoEffect(MISCREG_STATUS,
232 unpackLo(gdbregs.regs[GdbIntArchRegs + 0]));
233 context->setIntReg(INTREG_LO,
234 unpackHi(gdbregs.regs[GdbIntArchRegs + 0]));
235 context->setIntReg(INTREG_HI,
236 unpackLo(gdbregs.regs[GdbIntArchRegs + 1]));
237 context->setMiscRegNoEffect(MISCREG_BADVADDR,
238 unpackHi(gdbregs.regs[GdbIntArchRegs + 1]));
239 context->setMiscRegNoEffect(MISCREG_CAUSE,
240 unpackLo(gdbregs.regs[GdbIntArchRegs + 2]));
241 context->pcState(
242 unpackHi(gdbregs.regs[GdbIntArchRegs + 2]));
243 // FLOATREG: F0~F31
244 for (int i = 0; i < GdbFloatArchRegs; i++) {
245 context->setFloatRegBits(i * 2,
246 unpackLo(gdbregs.regs[GdbIntRegs + i]));
247 context->setFloatRegBits(i * 2 + 1,
248 unpackHi(gdbregs.regs[GdbIntRegs + i]));
249 }
250 // FCR, FIR
251 context->setFloatRegBits(FLOATREG_FCCR,
252 unpackLo(gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0]));
253 context->setFloatRegBits(FLOATREG_FIR,
254 unpackHi(gdbregs.regs[GdbIntRegs + GdbFloatArchRegs + 0]));
255}
256
257void
258RemoteGDB::clearSingleStep()
259{
260 DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n",
261 takenBkpt, notTakenBkpt);
262
263 if (takenBkpt != 0)
264 clearTempBreakpoint(takenBkpt);
265
266 if (notTakenBkpt != 0)
267 clearTempBreakpoint(notTakenBkpt);
268}
269
270void
271RemoteGDB::setSingleStep()
272{
273 PCState pc = context->pcState();
274 PCState bpc;
275 bool set_bt = false;
276
277 // User was stopped at pc, e.g. the instruction at pc was not
278 // executed.
279 MachInst inst = read<MachInst>(pc.pc());
280 StaticInstPtr si = context->getDecoderPtr()->decode(inst, pc.pc());
281 if (si->hasBranchTarget(pc, context, bpc)) {
282 // Don't bother setting a breakpoint on the taken branch if it
283 // is the same as the next npc
284 if (bpc.npc() != pc.nnpc())
285 set_bt = true;
286 }
287
288 DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n",
289 takenBkpt, notTakenBkpt);
290
291 notTakenBkpt = pc.nnpc();
292 setTempBreakpoint(notTakenBkpt);
293
294 if (set_bt) {
295 takenBkpt = bpc.npc();
296 setTempBreakpoint(takenBkpt);
297 }
298}
299
|