2 * Copyright (c) 2002-2004 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.
30 * Copyright (c) 1990, 1993
31 * The Regents of the University of California. All rights reserved.
33 * This software was developed by the Computer Systems Engineering group
34 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
35 * contributed to Berkeley.
37 * All advertising materials mentioning features or use of this software
38 * must display the following acknowledgement:
39 * This product includes software developed by the University of
40 * California, Lawrence Berkeley Laboratories.
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. All advertising materials mentioning features or use of this software
51 * must display the following acknowledgement:
52 * This product includes software developed by the University of
53 * California, Berkeley and its contributors.
54 * 4. Neither the name of the University nor the names of its contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
74 * Copyright (c) 2001 The NetBSD Foundation, Inc.
75 * All rights reserved.
77 * This code is derived from software contributed to The NetBSD Foundation
80 * Redistribution and use in source and binary forms, with or without
81 * modification, are permitted provided that the following conditions
83 * 1. Redistributions of source code must retain the above copyright
84 * notice, this list of conditions and the following disclaimer.
85 * 2. Redistributions in binary form must reproduce the above copyright
86 * notice, this list of conditions and the following disclaimer in the
87 * documentation and/or other materials provided with the distribution.
88 * 3. All advertising materials mentioning features or use of this software
89 * must display the following acknowledgement:
90 * This product includes software developed by the NetBSD
91 * Foundation, Inc. and its contributors.
92 * 4. Neither the name of The NetBSD Foundation nor the names of its
93 * contributors may be used to endorse or promote products derived
94 * from this software without specific prior written permission.
96 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
97 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
98 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
99 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
100 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
101 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
102 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
103 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
104 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
105 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
106 * POSSIBILITY OF SUCH DAMAGE.
110 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
114 * "Stub" to allow remote cpu to debug over a serial line using gdb.
117 #include <sys/signal.h>
124 #include "cpu/exec_context.hh"
125 #include "base/intmath.hh"
126 #include "base/kgdb.h"
128 #include "mem/functional_mem/physical_memory.hh"
129 #include "base/remote_gdb.hh"
130 #include "base/socket.hh"
131 #include "base/trace.hh"
132 #include "targetarch/vtophys.hh"
133 #include "sim/system.hh"
134 #include "cpu/static_inst.hh"
139 RemoteGDB
*theDebugger
= NULL
;
145 theDebugger
->trap(ALPHA_KENTRY_IF
);
149 ///////////////////////////////////////////////////////////
154 GDBListener::Event::Event(GDBListener
*l
, int fd
, int e
)
155 : PollEvent(fd
, e
), listener(l
)
159 GDBListener::Event::process(int revent
)
164 GDBListener::GDBListener(RemoteGDB
*g
, int p
)
165 : event(NULL
), gdb(g
), port(p
)
168 GDBListener::~GDBListener()
177 return gdb
->name() + ".listener";
181 GDBListener::listen()
183 while (!listener
.listen(port
, true)) {
184 DPRINTF(GDBMisc
, "Can't bind port %d\n", port
);
188 cerr
<< "Listening for remote gdb connection on port " << port
<< endl
;
189 event
= new Event(this, listener
.getfd(), POLLIN
);
190 pollQueue
.schedule(event
);
194 GDBListener::accept()
196 if (!listener
.islistening())
197 panic("GDBListener::accept(): cannot accept if we're not listening!");
199 int sfd
= listener
.accept(true);
202 if (gdb
->isattached())
209 ///////////////////////////////////////////////////////////
215 void mem2hex(void *, const void *, int);
216 const char *hex2mem(void *, const char *, int);
217 Addr
hex2i(const char **);
219 RemoteGDB::Event::Event(RemoteGDB
*g
, int fd
, int e
)
220 : PollEvent(fd
, e
), gdb(g
)
224 RemoteGDB::Event::process(int revent
)
227 gdb
->trap(ALPHA_KENTRY_IF
);
228 else if (revent
& POLLNVAL
)
232 RemoteGDB::RemoteGDB(System
*_system
, ExecContext
*c
)
233 : event(NULL
), fd(-1), active(false), attached(false),
234 system(_system
), pmem(_system
->physmem
), context(c
)
236 memset(gdbregs
, 0, sizeof(gdbregs
));
239 RemoteGDB::~RemoteGDB()
248 return system
->name() + ".remote_gdb";
252 RemoteGDB::isattached()
256 RemoteGDB::attach(int f
)
260 event
= new Event(this, fd
, POLLIN
);
261 pollQueue
.schedule(event
);
264 DPRINTFN("remote gdb attached\n");
277 pollQueue
.remove(event
);
278 DPRINTFN("remote gdb detached\n");
282 gdb_command(char cmd
)
285 case KGDB_SIGNAL
: return "KGDB_SIGNAL";
286 case KGDB_SET_BAUD
: return "KGDB_SET_BAUD";
287 case KGDB_SET_BREAK
: return "KGDB_SET_BREAK";
288 case KGDB_CONT
: return "KGDB_CONT";
289 case KGDB_ASYNC_CONT
: return "KGDB_ASYNC_CONT";
290 case KGDB_DEBUG
: return "KGDB_DEBUG";
291 case KGDB_DETACH
: return "KGDB_DETACH";
292 case KGDB_REG_R
: return "KGDB_REG_R";
293 case KGDB_REG_W
: return "KGDB_REG_W";
294 case KGDB_SET_THREAD
: return "KGDB_SET_THREAD";
295 case KGDB_CYCLE_STEP
: return "KGDB_CYCLE_STEP";
296 case KGDB_SIG_CYCLE_STEP
: return "KGDB_SIG_CYCLE_STEP";
297 case KGDB_KILL
: return "KGDB_KILL";
298 case KGDB_MEM_W
: return "KGDB_MEM_W";
299 case KGDB_MEM_R
: return "KGDB_MEM_R";
300 case KGDB_SET_REG
: return "KGDB_SET_REG";
301 case KGDB_READ_REG
: return "KGDB_READ_REG";
302 case KGDB_QUERY_VAR
: return "KGDB_QUERY_VAR";
303 case KGDB_SET_VAR
: return "KGDB_SET_VAR";
304 case KGDB_RESET
: return "KGDB_RESET";
305 case KGDB_STEP
: return "KGDB_STEP";
306 case KGDB_ASYNC_STEP
: return "KGDB_ASYNC_STEP";
307 case KGDB_THREAD_ALIVE
: return "KGDB_THREAD_ALIVE";
308 case KGDB_TARGET_EXIT
: return "KGDB_TARGET_EXIT";
309 case KGDB_BINARY_DLOAD
: return "KGDB_BINARY_DLOAD";
310 case KGDB_CLR_HW_BKPT
: return "KGDB_CLR_HW_BKPT";
311 case KGDB_SET_HW_BKPT
: return "KGDB_SET_HW_BKPT";
312 case KGDB_START
: return "KGDB_START";
313 case KGDB_END
: return "KGDB_END";
314 case KGDB_GOODP
: return "KGDB_GOODP";
315 case KGDB_BADP
: return "KGDB_BADP";
316 default: return "KGDB_UNKNOWN";
320 ///////////////////////////////////////////////////////////
323 // Determine if the mapping at va..(va+len) is valid.
326 RemoteGDB::acc(Addr va
, size_t len
)
330 va
= TheISA::TruncPage(va
);
331 last_va
= TheISA::RoundPage(va
+ len
);
334 if (TheISA::IsK0Seg(va
)) {
335 if (va
< (TheISA::K0SegBase
+ pmem
->size())) {
336 DPRINTF(GDBAcc
, "acc: Mapping is valid K0SEG <= "
337 "%#x < K0SEG + size\n", va
);
340 DPRINTF(GDBAcc
, "acc: Mapping invalid %#x > K0SEG + size\n",
347 * This code says that all accesses to palcode (instruction and data)
348 * are valid since there isn't a va->pa mapping because palcode is
349 * accessed physically. At some point this should probably be cleaned up
350 * but there is no easy way to do it.
353 if (AlphaISA::PcPAL(va
) || va
< 0x10000)
356 Addr ptbr
= context
->regs
.ipr
[AlphaISA::IPR_PALtemp20
];
357 TheISA::PageTableEntry pte
= kernel_pte_lookup(pmem
, ptbr
, va
);
359 DPRINTF(GDBAcc
, "acc: %#x pte is invalid\n", va
);
362 va
+= TheISA::PageBytes
;
363 } while (va
< last_va
);
365 DPRINTF(GDBAcc
, "acc: %#x mapping is valid\n", va
);
369 ///////////////////////////////////////////////////////////
372 // Translate a trap number into a Unix-compatible signal number.
373 // (GDB only understands Unix signal numbers.)
376 RemoteGDB::signal(int type
)
379 case ALPHA_KENTRY_INT
:
382 case ALPHA_KENTRY_UNA
:
385 case ALPHA_KENTRY_ARITH
:
388 case ALPHA_KENTRY_IF
:
391 case ALPHA_KENTRY_MM
:
395 panic("unknown signal type");
400 ///////////////////////////////////////////////////////////
401 // RemoteGDB::getregs
403 // Translate the kernel debugger register format into
404 // the GDB register format.
408 memset(gdbregs
, 0, sizeof(gdbregs
));
409 memcpy(&gdbregs
[KGDB_REG_V0
], context
->regs
.intRegFile
, 32 * sizeof(uint64_t));
411 memcpy(&gdbregs
[KGDB_REG_F0
], context
->regs
.floatRegFile
.q
,
412 32 * sizeof(uint64_t));
414 gdbregs
[KGDB_REG_PC
] = context
->regs
.pc
;
417 ///////////////////////////////////////////////////////////
418 // RemoteGDB::setregs
420 // Translate the GDB register format into the kernel
421 // debugger register format.
426 memcpy(context
->regs
.intRegFile
, &gdbregs
[KGDB_REG_V0
],
427 32 * sizeof(uint64_t));
429 memcpy(context
->regs
.floatRegFile
.q
, &gdbregs
[KGDB_REG_F0
],
430 32 * sizeof(uint64_t));
432 context
->regs
.pc
= gdbregs
[KGDB_REG_PC
];
436 RemoteGDB::setTempBreakpoint(TempBreakpoint
&bkpt
, Addr addr
)
438 DPRINTF(GDBMisc
, "setTempBreakpoint: addr=%#x\n", addr
);
441 insertHardBreak(addr
, 4);
445 RemoteGDB::clearTempBreakpoint(TempBreakpoint
&bkpt
)
447 DPRINTF(GDBMisc
, "setTempBreakpoint: addr=%#x\n",
451 removeHardBreak(bkpt
.address
, 4);
456 RemoteGDB::clearSingleStep()
458 DPRINTF(GDBMisc
, "clearSingleStep bt_addr=%#x nt_addr=%#x\n",
459 takenBkpt
.address
, notTakenBkpt
.address
);
461 if (takenBkpt
.address
!= 0)
462 clearTempBreakpoint(takenBkpt
);
464 if (notTakenBkpt
.address
!= 0)
465 clearTempBreakpoint(notTakenBkpt
);
469 RemoteGDB::setSingleStep()
471 Addr pc
= context
->regs
.pc
;
475 npc
= pc
+ sizeof(MachInst
);
477 // User was stopped at pc, e.g. the instruction at pc was not
479 MachInst inst
= read
<MachInst
>(pc
);
480 StaticInstPtr
<TheISA
> si(inst
);
481 if (si
->hasBranchTarget(pc
, context
, bpc
)) {
482 // Don't bother setting a breakpoint on the taken branch if it
483 // is the same as the next pc
488 DPRINTF(GDBMisc
, "setSingleStep bt_addr=%#x nt_addr=%#x\n",
489 takenBkpt
.address
, notTakenBkpt
.address
);
491 setTempBreakpoint(notTakenBkpt
, npc
);
494 setTempBreakpoint(takenBkpt
, bpc
);
497 /////////////////////////
510 RemoteGDB::putbyte(uint8_t b
)
515 // Send a packet to gdb
517 RemoteGDB::send(const char *bp
)
522 DPRINTF(GDBSend
, "send: %s\n", bp
);
527 for (csum
= 0; (c
= *p
); p
++) {
532 putbyte(i2digit(csum
>> 4));
533 putbyte(i2digit(csum
));
534 } while ((c
= getbyte() & 0x7f) == KGDB_BADP
);
537 // Receive a packet from gdb
539 RemoteGDB::recv(char *bp
, int maxlen
)
548 while ((c
= getbyte()) != KGDB_START
)
551 while ((c
= getbyte()) != KGDB_END
&& len
< maxlen
) {
565 csum
-= digit2i(getbyte()) * 16;
566 csum
-= digit2i(getbyte());
575 bcopy(bp
+ 3, bp
, len
);
582 DPRINTF(GDBRecv
, "recv: %s: %s\n", gdb_command(*bp
), bp
);
587 // Read bytes from kernel address space for debugger.
589 RemoteGDB::read(Addr vaddr
, size_t size
, char *data
)
591 static Addr lastaddr
= 0;
592 static size_t lastsize
= 0;
597 DPRINTF(GDBRead
, "read: reading memory location zero!\n");
598 vaddr
= lastaddr
+ lastsize
;
601 DPRINTF(GDBRead
, "read: addr=%#x, size=%d", vaddr
, size
);
610 size_t count
= min((Addr
)size
,
611 VMPageSize
- (vaddr
& (VMPageSize
- 1)));
613 maddr
= vtomem(context
, vaddr
, count
);
614 memcpy(data
, maddr
, count
);
620 while (size
>= VMPageSize
) {
621 maddr
= vtomem(context
, vaddr
, count
);
622 memcpy(data
, maddr
, VMPageSize
);
630 maddr
= vtomem(context
, vaddr
, count
);
631 memcpy(data
, maddr
, size
);
635 if (DTRACE(GDBRead
)) {
636 if (DTRACE(GDBExtra
)) {
639 DPRINTFNR(": %s\n", buf
);
648 // Write bytes to kernel address space for debugger.
650 RemoteGDB::write(Addr vaddr
, size_t size
, const char *data
)
652 static Addr lastaddr
= 0;
653 static size_t lastsize
= 0;
658 DPRINTF(GDBWrite
, "write: writing memory location zero!\n");
659 vaddr
= lastaddr
+ lastsize
;
662 if (DTRACE(GDBWrite
)) {
663 DPRINTFN("write: addr=%#x, size=%d", vaddr
, size
);
664 if (DTRACE(GDBExtra
)) {
666 mem2hex(buf
, data
, size
);
667 DPRINTFNR(": %s\n", buf
);
675 size_t count
= min((Addr
)size
,
676 VMPageSize
- (vaddr
& (VMPageSize
- 1)));
678 maddr
= vtomem(context
, vaddr
, count
);
679 memcpy(maddr
, data
, count
);
685 while (size
>= VMPageSize
) {
686 maddr
= vtomem(context
, vaddr
, count
);
687 memcpy(maddr
, data
, VMPageSize
);
695 maddr
= vtomem(context
, vaddr
, count
);
696 memcpy(maddr
, data
, size
);
707 PCEventQueue
*RemoteGDB::getPcEventQueue()
709 return &system
->pcEventQueue
;
713 RemoteGDB::HardBreakpoint::HardBreakpoint(RemoteGDB
*_gdb
, Addr pc
)
714 : PCEvent(_gdb
->getPcEventQueue(), "HardBreakpoint Event", pc
),
715 gdb(_gdb
), refcount(0)
717 DPRINTF(GDBMisc
, "creating hardware breakpoint at %#x\n", evpc
);
722 RemoteGDB::HardBreakpoint::process(ExecContext
*xc
)
724 DPRINTF(GDBMisc
, "handling hardware breakpoint at %#x\n", pc());
726 if (xc
== gdb
->context
)
727 gdb
->trap(ALPHA_KENTRY_INT
);
731 RemoteGDB::insertSoftBreak(Addr addr
, size_t len
)
733 if (len
!= sizeof(MachInst
))
734 panic("invalid length\n");
736 return insertHardBreak(addr
, len
);
740 RemoteGDB::removeSoftBreak(Addr addr
, size_t len
)
742 if (len
!= sizeof(MachInst
))
743 panic("invalid length\n");
745 return removeHardBreak(addr
, len
);
749 RemoteGDB::insertHardBreak(Addr addr
, size_t len
)
751 if (len
!= sizeof(MachInst
))
752 panic("invalid length\n");
754 DPRINTF(GDBMisc
, "inserting hardware breakpoint at %#x\n", addr
);
756 HardBreakpoint
*&bkpt
= hardBreakMap
[addr
];
758 bkpt
= new HardBreakpoint(this, addr
);
766 RemoteGDB::removeHardBreak(Addr addr
, size_t len
)
768 if (len
!= sizeof(MachInst
))
769 panic("invalid length\n");
771 DPRINTF(GDBMisc
, "removing hardware breakpoint at %#x\n", addr
);
773 break_iter_t i
= hardBreakMap
.find(addr
);
774 if (i
== hardBreakMap
.end())
777 HardBreakpoint
*hbp
= (*i
).second
;
778 if (--hbp
->refcount
== 0) {
780 hardBreakMap
.erase(i
);
790 case '0': return "software breakpoint";
791 case '1': return "hardware breakpoint";
792 case '2': return "write watchpoint";
793 case '3': return "read watchpoint";
794 case '4': return "access watchpoint";
795 default: return "unknown breakpoint/watchpoint";
799 // This function does all command processing for interfacing to a
800 // remote gdb. Note that the error codes are ignored by gdb at
801 // present, but might eventually become meaningful. (XXX) It might
802 // makes sense to use POSIX errno values, because that is what the
803 // gdb/remote.c functions want to return.
805 RemoteGDB::trap(int type
)
809 char data
[KGDB_BUFLEN
+ 1];
810 char buffer
[sizeof(gdbregs
) * 2 + 256];
811 char temp
[KGDB_BUFLEN
];
813 char command
, subcmd
;
820 DPRINTF(GDBMisc
, "trap: PC=%#x NPC=%#x\n",
821 context
->regs
.pc
, context
->regs
.npc
);
826 * The first entry to this function is normally through
827 * a breakpoint trap in kgdb_connect(), in which case we
828 * must advance past the breakpoint because gdb will not.
830 * On the first entry here, we expect that gdb is not yet
831 * listening to us, so just enter the interaction loop.
832 * After the debugger is "active" (connected) it will be
833 * waiting for a "signaled" message from us.
838 // Tell remote host that an exception has occurred.
839 sprintf((char *)buffer
, "S%02x", signal(type
));
842 // Stick frame regs into our reg cache.
846 datalen
= recv(data
, sizeof(data
));
847 data
[sizeof(data
) - 1] = 0; // Sentinel
854 // if this command came from a running gdb, answer it --
855 // the other guy has no way of knowing if we're in or out
856 // of this loop when he issues a "remote-signal".
857 sprintf((char *)buffer
, "S%02x", signal(type
));
862 if (2 * sizeof(gdbregs
) > sizeof(buffer
))
863 panic("buffer too small");
865 mem2hex(buffer
, gdbregs
, sizeof(gdbregs
));
870 p
= hex2mem(gdbregs
, p
, sizeof(gdbregs
));
871 if (p
== NULL
|| *p
!= '\0')
886 if (val
< 0 && val
>= KGDB_NUMREGS
) {
891 gdbregs
[val
] = hex2i(&p
);
909 if (len
> sizeof(buffer
)) {
913 if (!acc(val
, len
)) {
918 if (read(val
, (size_t)len
, (char *)buffer
)) {
919 mem2hex(temp
, buffer
, len
);
937 if (len
> datalen
- (p
- data
)) {
941 p
= hex2mem(buffer
, p
, sizeof(buffer
));
946 if (!acc(val
, len
)) {
950 if (write(val
, (size_t)len
, (char *)buffer
))
956 case KGDB_SET_THREAD
:
972 case KGDB_ASYNC_CONT
:
976 context
->regs
.pc
= val
;
977 context
->regs
.npc
= val
+ sizeof(MachInst
);
983 if (p
- data
< datalen
) {
985 context
->regs
.pc
= val
;
986 context
->regs
.npc
= val
+ sizeof(MachInst
);
991 case KGDB_ASYNC_STEP
:
995 context
->regs
.pc
= val
;
996 context
->regs
.npc
= val
+ sizeof(MachInst
);
1002 if (p
- data
< datalen
) {
1004 context
->regs
.pc
= val
;
1005 context
->regs
.npc
= val
+ sizeof(MachInst
);
1010 case KGDB_CLR_HW_BKPT
:
1012 if (*p
++ != ',') send("E0D");
1014 if (*p
++ != ',') send("E0D");
1017 DPRINTF(GDBMisc
, "clear %s, addr=%#x, len=%d\n",
1018 break_type(subcmd
), val
, len
);
1023 case '0': // software breakpoint
1024 ret
= removeSoftBreak(val
, len
);
1027 case '1': // hardware breakpoint
1028 ret
= removeHardBreak(val
, len
);
1031 case '2': // write watchpoint
1032 case '3': // read watchpoint
1033 case '4': // access watchpoint
1039 send(ret
? "OK" : "E0C");
1042 case KGDB_SET_HW_BKPT
:
1044 if (*p
++ != ',') send("E0D");
1046 if (*p
++ != ',') send("E0D");
1049 DPRINTF(GDBMisc
, "set %s, addr=%#x, len=%d\n",
1050 break_type(subcmd
), val
, len
);
1055 case '0': // software breakpoint
1056 ret
= insertSoftBreak(val
, len
);
1059 case '1': // hardware breakpoint
1060 ret
= insertHardBreak(val
, len
);
1063 case '2': // write watchpoint
1064 case '3': // read watchpoint
1065 case '4': // access watchpoint
1071 send(ret
? "OK" : "E0C");
1074 case KGDB_QUERY_VAR
:
1075 var
= string(p
, datalen
- 1);
1083 case KGDB_SET_BREAK
:
1085 case KGDB_CYCLE_STEP
:
1086 case KGDB_SIG_CYCLE_STEP
:
1090 case KGDB_THREAD_ALIVE
:
1091 case KGDB_TARGET_EXIT
:
1092 case KGDB_BINARY_DLOAD
:
1093 // Unsupported command
1094 DPRINTF(GDBMisc
, "Unsupported command: %s\n",
1095 gdb_command(command
));
1096 DDUMP(GDBMisc
, (uint8_t *)data
, datalen
);
1102 DPRINTF(GDBMisc
, "Unknown command: %c(%#x)\n",
1115 // Convert a hex digit into an integer.
1116 // This returns -1 if the argument passed is no valid hex digit.
1120 if (c
>= '0' && c
<= '9')
1122 else if (c
>= 'a' && c
<= 'f')
1123 return (c
- 'a' + 10);
1124 else if (c
>= 'A' && c
<= 'F')
1126 return (c
- 'A' + 10);
1131 // Convert the low 4 bits of an integer into an hex digit.
1135 return ("0123456789abcdef"[n
& 0x0f]);
1138 // Convert a byte array into an hex string.
1140 mem2hex(void *vdst
, const void *vsrc
, int len
)
1142 char *dst
= (char *)vdst
;
1143 const char *src
= (const char *)vsrc
;
1146 *dst
++ = i2digit(*src
>> 4);
1147 *dst
++ = i2digit(*src
++);
1152 // Convert an hex string into a byte array.
1153 // This returns a pointer to the character following the last valid
1154 // hex digit. If the string ends in the middle of a byte, NULL is
1157 hex2mem(void *vdst
, const char *src
, int maxlen
)
1159 char *dst
= (char *)vdst
;
1162 while (*src
&& maxlen
--) {
1163 msb
= digit2i(*src
++);
1166 lsb
= digit2i(*src
++);
1169 *dst
++ = (msb
<< 4) | lsb
;
1174 // Convert an hex string into an integer.
1175 // This returns a pointer to the character following the last valid
1178 hex2i(const char **srcp
)
1180 const char *src
= *srcp
;
1184 while ((nibble
= digit2i(*src
)) >= 0) {