1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
6 Contributed by Cygnus Support. Written by Ian Lance Taylor
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "exceptions.h"
33 #include "gdb_string.h"
37 #include "mips-tdep.h"
40 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
41 types passed by breakpoint.c to target_insert_watchpoint.
42 Value 3 is our own invention, and is used for ordinary instruction
43 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
53 /* Prototypes for local functions. */
55 static int mips_readchar (int timeout
);
57 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
60 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
61 int *pch
, int timeout
);
63 static int mips_cksum (const unsigned char *hdr
,
64 const unsigned char *data
, int len
);
66 static void mips_send_packet (const char *s
, int get_ack
);
68 static void mips_send_command (const char *cmd
, int prompt
);
70 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
72 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
73 int *perr
, int timeout
, char *buff
);
75 static void mips_initialize (void);
77 static void mips_open (char *name
, int from_tty
);
79 static void pmon_open (char *name
, int from_tty
);
81 static void ddb_open (char *name
, int from_tty
);
83 static void lsi_open (char *name
, int from_tty
);
85 static void mips_close (int quitting
);
87 static void mips_detach (struct target_ops
*ops
, char *args
, int from_tty
);
89 static void mips_resume (ptid_t ptid
, int step
,
90 enum target_signal siggnal
);
92 static int mips_map_regno (struct gdbarch
*, int);
94 static void mips_fetch_registers (struct regcache
*regcache
, int regno
);
96 static void mips_prepare_to_store (struct regcache
*regcache
);
98 static void mips_store_registers (struct regcache
*regcache
, int regno
);
100 static unsigned int mips_fetch_word (CORE_ADDR addr
);
102 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
105 static int mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
,
107 struct mem_attrib
*attrib
,
108 struct target_ops
*target
);
110 static void mips_files_info (struct target_ops
*ignore
);
112 static void mips_mourn_inferior (void);
114 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
);
116 static int pmon_zeroset (int recsize
, char **buff
, int *amount
,
117 unsigned int *chksum
);
119 static int pmon_checkset (int recsize
, char **buff
, int *value
);
121 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
122 int *inptr
, int inamount
, int *recsize
,
123 unsigned int *csum
, unsigned int *zerofill
);
125 static int pmon_check_ack (char *mesg
);
127 static void pmon_start_download (void);
129 static void pmon_end_download (int final
, int bintotal
);
131 static void pmon_download (char *buffer
, int length
);
133 static void pmon_load_fast (char *file
);
135 static void mips_load (char *file
, int from_tty
);
137 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
138 unsigned char *myaddr
, int len
);
140 static int mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
142 static int mips_clear_breakpoint (CORE_ADDR addr
, int len
,
143 enum break_type type
);
145 static int mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
,
146 enum break_type type
);
148 /* Forward declarations. */
149 extern struct target_ops mips_ops
;
150 extern struct target_ops pmon_ops
;
151 extern struct target_ops ddb_ops
;
153 /* The MIPS remote debugging interface is built on top of a simple
154 packet protocol. Each packet is organized as follows:
156 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
157 may not appear anywhere else in the packet. Any time a SYN is
158 seen, a new packet should be assumed to have begun.
161 This byte contains the upper five bits of the logical length
162 of the data section, plus a single bit indicating whether this
163 is a data packet or an acknowledgement. The documentation
164 indicates that this bit is 1 for a data packet, but the actual
165 board uses 1 for an acknowledgement. The value of the byte is
166 0x40 + (ack ? 0x20 : 0) + (len >> 6)
167 (we always have 0 <= len < 1024). Acknowledgement packets do
168 not carry data, and must have a data length of 0.
170 LEN1 This byte contains the lower six bits of the logical length of
171 the data section. The value is
174 SEQ This byte contains the six bit sequence number of the packet.
177 An acknowlegment packet contains the sequence number of the
178 packet being acknowledged plus 1 modulo 64. Data packets are
179 transmitted in sequence. There may only be one outstanding
180 unacknowledged data packet at a time. The sequence numbers
181 are independent in each direction. If an acknowledgement for
182 the previous packet is received (i.e., an acknowledgement with
183 the sequence number of the packet just sent) the packet just
184 sent should be retransmitted. If no acknowledgement is
185 received within a timeout period, the packet should be
186 retransmitted. This has an unfortunate failure condition on a
187 high-latency line, as a delayed acknowledgement may lead to an
188 endless series of duplicate packets.
190 DATA The actual data bytes follow. The following characters are
191 escaped inline with DLE (ASCII 020, or ^P):
197 The additional DLE characters are not counted in the logical
198 length stored in the TYPE_LEN and LEN1 bytes.
203 These bytes contain an 18 bit checksum of the complete
204 contents of the packet excluding the SEQ byte and the
205 CSUM[123] bytes. The checksum is simply the twos complement
206 addition of all the bytes treated as unsigned characters. The
207 values of the checksum bytes are:
208 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
209 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
210 CSUM3: 0x40 + (cksum & 0x3f)
212 It happens that the MIPS remote debugging protocol always
213 communicates with ASCII strings. Because of this, this
214 implementation doesn't bother to handle the DLE quoting mechanism,
215 since it will never be required. */
219 /* The SYN character which starts each packet. */
222 /* The 0x40 used to offset each packet (this value ensures that all of
223 the header and trailer bytes, other than SYN, are printable ASCII
225 #define HDR_OFFSET 0x40
227 /* The indices of the bytes in the packet header. */
228 #define HDR_INDX_SYN 0
229 #define HDR_INDX_TYPE_LEN 1
230 #define HDR_INDX_LEN1 2
231 #define HDR_INDX_SEQ 3
234 /* The data/ack bit in the TYPE_LEN header byte. */
235 #define TYPE_LEN_DA_BIT 0x20
236 #define TYPE_LEN_DATA 0
237 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
239 /* How to compute the header bytes. */
240 #define HDR_SET_SYN(data, len, seq) (SYN)
241 #define HDR_SET_TYPE_LEN(data, len, seq) \
243 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
244 + (((len) >> 6) & 0x1f))
245 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
246 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
248 /* Check that a header byte is reasonable. */
249 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
251 /* Get data from the header. These macros evaluate their argument
253 #define HDR_IS_DATA(hdr) \
254 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
255 #define HDR_GET_LEN(hdr) \
256 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
257 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
259 /* The maximum data length. */
260 #define DATA_MAXLEN 1023
262 /* The trailer offset. */
263 #define TRLR_OFFSET HDR_OFFSET
265 /* The indices of the bytes in the packet trailer. */
266 #define TRLR_INDX_CSUM1 0
267 #define TRLR_INDX_CSUM2 1
268 #define TRLR_INDX_CSUM3 2
269 #define TRLR_LENGTH 3
271 /* How to compute the trailer bytes. */
272 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
273 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
274 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
276 /* Check that a trailer byte is reasonable. */
277 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
279 /* Get data from the trailer. This evaluates its argument multiple
281 #define TRLR_GET_CKSUM(trlr) \
282 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
283 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
284 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
286 /* The sequence number modulos. */
287 #define SEQ_MODULOS (64)
289 /* PMON commands to load from the serial port or UDP socket. */
290 #define LOAD_CMD "load -b -s tty0\r"
291 #define LOAD_CMD_UDP "load -b -s udp\r"
293 /* The target vectors for the four different remote MIPS targets.
294 These are initialized with code in _initialize_remote_mips instead
295 of static initializers, to make it easier to extend the target_ops
297 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
299 enum mips_monitor_type
301 /* IDT/SIM monitor being used: */
303 /* PMON monitor being used: */
304 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
305 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
306 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
307 /* Last and unused value, for sizing vectors, etc. */
310 static enum mips_monitor_type mips_monitor
= MON_LAST
;
312 /* The monitor prompt text. If the user sets the PMON prompt
313 to some new value, the GDB `set monitor-prompt' command must also
314 be used to inform GDB about the expected prompt. Otherwise, GDB
315 will not be able to connect to PMON in mips_initialize().
316 If the `set monitor-prompt' command is not used, the expected
317 default prompt will be set according the target:
324 static char *mips_monitor_prompt
;
326 /* Set to 1 if the target is open. */
327 static int mips_is_open
;
329 /* Currently active target description (if mips_is_open == 1) */
330 static struct target_ops
*current_ops
;
332 /* Set to 1 while the connection is being initialized. */
333 static int mips_initializing
;
335 /* Set to 1 while the connection is being brought down. */
336 static int mips_exiting
;
338 /* The next sequence number to send. */
339 static unsigned int mips_send_seq
;
341 /* The next sequence number we expect to receive. */
342 static unsigned int mips_receive_seq
;
344 /* The time to wait before retransmitting a packet, in seconds. */
345 static int mips_retransmit_wait
= 3;
347 /* The number of times to try retransmitting a packet before giving up. */
348 static int mips_send_retries
= 10;
350 /* The number of garbage characters to accept when looking for an
351 SYN for the next packet. */
352 static int mips_syn_garbage
= 10;
354 /* The time to wait for a packet, in seconds. */
355 static int mips_receive_wait
= 5;
357 /* Set if we have sent a packet to the board but have not yet received
359 static int mips_need_reply
= 0;
361 /* Handle used to access serial I/O stream. */
362 static struct serial
*mips_desc
;
364 /* UDP handle used to download files to target. */
365 static struct serial
*udp_desc
;
366 static int udp_in_use
;
368 /* TFTP filename used to download files to DDB board, in the form
370 static char *tftp_name
; /* host:filename */
371 static char *tftp_localname
; /* filename portion of above */
372 static int tftp_in_use
;
373 static FILE *tftp_file
;
375 /* Counts the number of times the user tried to interrupt the target (usually
377 static int interrupt_count
;
379 /* If non-zero, means that the target is running. */
380 static int mips_wait_flag
= 0;
382 /* If non-zero, monitor supports breakpoint commands. */
383 static int monitor_supports_breakpoints
= 0;
385 /* Data cache header. */
387 #if 0 /* not used (yet?) */
388 static DCACHE
*mips_dcache
;
391 /* Non-zero means that we've just hit a read or write watchpoint */
392 static int hit_watchpoint
;
394 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
395 The table is indexed by a breakpoint number, which is an integer
396 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
398 #define MAX_LSI_BREAKPOINTS 256
399 struct lsi_breakpoint_info
401 enum break_type type
; /* type of breakpoint */
402 CORE_ADDR addr
; /* address of breakpoint */
403 int len
; /* length of region being watched */
404 unsigned long value
; /* value to watch */
406 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
408 /* Error/warning codes returned by LSI PMON for breakpoint commands.
409 Warning values may be ORed together; error values may not. */
410 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
411 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
412 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
413 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
415 #define E_ERR 0x200 /* This bit is set if the error code is an error */
416 #define E_BPT 0x200 /* error: No such breakpoint number */
417 #define E_RGE 0x201 /* error: Range is not supported */
418 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
419 #define E_OUT 0x203 /* error: Out of hardware resources */
420 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
424 int code
; /* error code */
425 char *string
; /* string associated with this code */
428 struct lsi_error lsi_warning_table
[] =
430 {W_MSK
, "Range feature is supported via mask"},
431 {W_VAL
, "Value check is not supported in hardware"},
432 {W_QAL
, "Requested qualifiers are not supported in hardware"},
436 struct lsi_error lsi_error_table
[] =
438 {E_BPT
, "No such breakpoint number"},
439 {E_RGE
, "Range is not supported"},
440 {E_QAL
, "The requested qualifiers can not be used"},
441 {E_OUT
, "Out of hardware resources"},
442 {E_NON
, "Hardware breakpoint not supported"},
446 /* Set to 1 with the 'set monitor-warnings' command to enable printing
447 of warnings returned by PMON when hardware breakpoints are used. */
448 static int monitor_warnings
;
455 serial_close (mips_desc
);
459 serial_close (udp_desc
);
465 /* Handle low-level error that we can't recover from. Note that just
466 error()ing out from target_wait or some such low-level place will cause
467 all hell to break loose--the rest of GDB will tend to get left in an
468 inconsistent state. */
471 mips_error (char *string
,...)
475 va_start (args
, string
);
477 target_terminal_ours ();
478 wrap_here (""); /* Force out any buffered output */
479 gdb_flush (gdb_stdout
);
481 fputs_filtered (error_pre_print
, gdb_stderr
);
482 vfprintf_filtered (gdb_stderr
, string
, args
);
483 fprintf_filtered (gdb_stderr
, "\n");
485 gdb_flush (gdb_stderr
);
487 /* Clean up in such a way that mips_close won't try to talk to the
488 board (it almost surely won't work since we weren't able to talk to
492 printf_unfiltered ("Ending remote MIPS debugging.\n");
493 target_mourn_inferior ();
495 deprecated_throw_reason (RETURN_ERROR
);
498 /* putc_readable - print a character, displaying non-printable chars in
499 ^x notation or in hex. */
502 fputc_readable (int ch
, struct ui_file
*file
)
505 fputc_unfiltered ('\n', file
);
507 fprintf_unfiltered (file
, "\\r");
508 else if (ch
< 0x20) /* ASCII control character */
509 fprintf_unfiltered (file
, "^%c", ch
+ '@');
510 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
511 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
513 fputc_unfiltered (ch
, file
);
517 /* puts_readable - print a string, displaying non-printable chars in
518 ^x notation or in hex. */
521 fputs_readable (const char *string
, struct ui_file
*file
)
525 while ((c
= *string
++) != '\0')
526 fputc_readable (c
, file
);
530 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
531 timed out. TIMEOUT specifies timeout value in seconds.
535 mips_expect_timeout (const char *string
, int timeout
)
537 const char *p
= string
;
541 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
542 fputs_readable (string
, gdb_stdlog
);
543 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
551 /* Must use serial_readchar() here cuz mips_readchar would get
552 confused if we were waiting for the mips_monitor_prompt... */
554 c
= serial_readchar (mips_desc
, timeout
);
556 if (c
== SERIAL_TIMEOUT
)
559 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
564 fputc_readable (c
, gdb_stdlog
);
572 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
585 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
586 timed out. The timeout value is hard-coded to 2 seconds. Use
587 mips_expect_timeout if a different timeout value is needed.
591 mips_expect (const char *string
)
593 return mips_expect_timeout (string
, remote_timeout
);
596 /* Read a character from the remote, aborting on error. Returns
597 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
598 returns). FIXME: If we see the string mips_monitor_prompt from the
599 board, then we are debugging on the main console port, and we have
600 somehow dropped out of remote debugging mode. In this case, we
601 automatically go back in to remote debugging mode. This is a hack,
602 put in because I can't find any way for a program running on the
603 remote board to terminate without also ending remote debugging
604 mode. I assume users won't have any trouble with this; for one
605 thing, the IDT documentation generally assumes that the remote
606 debugging port is not the console port. This is, however, very
607 convenient for DejaGnu when you only have one connected serial
611 mips_readchar (int timeout
)
614 static int state
= 0;
615 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
621 if (i
== -1 && watchdog
> 0)
625 if (state
== mips_monitor_prompt_len
)
627 ch
= serial_readchar (mips_desc
, timeout
);
629 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
631 target_mourn_inferior ();
632 error ("Watchdog has expired. Target detached.\n");
635 if (ch
== SERIAL_EOF
)
636 mips_error ("End of file from remote");
637 if (ch
== SERIAL_ERROR
)
638 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
639 if (remote_debug
> 1)
641 /* Don't use _filtered; we can't deal with a QUIT out of
642 target_wait, and I think this might be called from there. */
643 if (ch
!= SERIAL_TIMEOUT
)
644 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
646 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
649 /* If we have seen mips_monitor_prompt and we either time out, or
650 we see a @ (which was echoed from a packet we sent), reset the
651 board as described above. The first character in a packet after
652 the SYN (which is not echoed) is always an @ unless the packet is
653 more than 64 characters long, which ours never are. */
654 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
655 && state
== mips_monitor_prompt_len
656 && !mips_initializing
659 if (remote_debug
> 0)
660 /* Don't use _filtered; we can't deal with a QUIT out of
661 target_wait, and I think this might be called from there. */
662 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
669 /* At this point, about the only thing we can do is abort the command
670 in progress and get back to command level as quickly as possible. */
672 error ("Remote board reset, debug protocol re-initialized.");
675 if (ch
== mips_monitor_prompt
[state
])
683 /* Get a packet header, putting the data in the supplied buffer.
684 PGARBAGE is a pointer to the number of garbage characters received
685 so far. CH is the last character received. Returns 0 for success,
686 or -1 for timeout. */
689 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
695 /* Wait for a SYN. mips_syn_garbage is intended to prevent
696 sitting here indefinitely if the board sends us one garbage
697 character per second. ch may already have a value from the
698 last time through the loop. */
701 ch
= mips_readchar (timeout
);
702 if (ch
== SERIAL_TIMEOUT
)
706 /* Printing the character here lets the user of gdb see
707 what the program is outputting, if the debugging is
708 being done on the console port. Don't use _filtered:
709 we can't deal with a QUIT out of target_wait and
710 buffered target output confuses the user. */
711 if (!mips_initializing
|| remote_debug
> 0)
713 if (isprint (ch
) || isspace (ch
))
715 fputc_unfiltered (ch
, gdb_stdtarg
);
719 fputc_readable (ch
, gdb_stdtarg
);
721 gdb_flush (gdb_stdtarg
);
724 /* Only count unprintable characters. */
725 if (! (isprint (ch
) || isspace (ch
)))
728 if (mips_syn_garbage
> 0
729 && *pgarbage
> mips_syn_garbage
)
730 mips_error ("Debug protocol failure: more than %d characters before a sync.",
735 /* Get the packet header following the SYN. */
736 for (i
= 1; i
< HDR_LENGTH
; i
++)
738 ch
= mips_readchar (timeout
);
739 if (ch
== SERIAL_TIMEOUT
)
741 /* Make sure this is a header byte. */
742 if (ch
== SYN
|| !HDR_CHECK (ch
))
748 /* If we got the complete header, we can return. Otherwise we
749 loop around and keep looking for SYN. */
755 /* Get a packet header, putting the data in the supplied buffer.
756 PGARBAGE is a pointer to the number of garbage characters received
757 so far. The last character read is returned in *PCH. Returns 0
758 for success, -1 for timeout, -2 for error. */
761 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
, int *pch
, int timeout
)
766 for (i
= 0; i
< TRLR_LENGTH
; i
++)
768 ch
= mips_readchar (timeout
);
770 if (ch
== SERIAL_TIMEOUT
)
772 if (!TRLR_CHECK (ch
))
779 /* Get the checksum of a packet. HDR points to the packet header.
780 DATA points to the packet data. LEN is the length of DATA. */
783 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
785 const unsigned char *p
;
791 /* The initial SYN is not included in the checksum. */
805 /* Send a packet containing the given ASCII string. */
808 mips_send_packet (const char *s
, int get_ack
)
810 /* unsigned */ int len
;
811 unsigned char *packet
;
816 if (len
> DATA_MAXLEN
)
817 mips_error ("MIPS protocol data packet too long: %s", s
);
819 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
821 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
822 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
823 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
824 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
826 memcpy (packet
+ HDR_LENGTH
, s
, len
);
828 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
829 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
830 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
831 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
833 /* Increment the sequence number. This will set mips_send_seq to
834 the sequence number we expect in the acknowledgement. */
835 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
837 /* We can only have one outstanding data packet, so we just wait for
838 the acknowledgement here. Keep retransmitting the packet until
839 we get one, or until we've tried too many times. */
840 for (try = 0; try < mips_send_retries
; try++)
845 if (remote_debug
> 0)
847 /* Don't use _filtered; we can't deal with a QUIT out of
848 target_wait, and I think this might be called from there. */
849 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
850 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
853 if (serial_write (mips_desc
, packet
,
854 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
855 mips_error ("write to target failed: %s", safe_strerror (errno
));
864 unsigned char hdr
[HDR_LENGTH
+ 1];
865 unsigned char trlr
[TRLR_LENGTH
+ 1];
869 /* Get the packet header. If we time out, resend the data
871 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
877 /* If we get a data packet, assume it is a duplicate and
878 ignore it. FIXME: If the acknowledgement is lost, this
879 data packet may be the packet the remote sends after the
881 if (HDR_IS_DATA (hdr
))
885 /* Ignore any errors raised whilst attempting to ignore
888 len
= HDR_GET_LEN (hdr
);
890 for (i
= 0; i
< len
; i
++)
894 rch
= mips_readchar (remote_timeout
);
900 if (rch
== SERIAL_TIMEOUT
)
902 /* ignore the character */
906 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
909 /* We don't bother checking the checksum, or providing an
910 ACK to the packet. */
914 /* If the length is not 0, this is a garbled packet. */
915 if (HDR_GET_LEN (hdr
) != 0)
918 /* Get the packet trailer. */
919 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
920 mips_retransmit_wait
);
922 /* If we timed out, resend the data packet. */
926 /* If we got a bad character, reread the header. */
930 /* If the checksum does not match the trailer checksum, this
931 is a bad packet; ignore it. */
932 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
933 != TRLR_GET_CKSUM (trlr
))
936 if (remote_debug
> 0)
938 hdr
[HDR_LENGTH
] = '\0';
939 trlr
[TRLR_LENGTH
] = '\0';
940 /* Don't use _filtered; we can't deal with a QUIT out of
941 target_wait, and I think this might be called from there. */
942 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
943 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
946 /* If this ack is for the current packet, we're done. */
947 seq
= HDR_GET_SEQ (hdr
);
948 if (seq
== mips_send_seq
)
951 /* If this ack is for the last packet, resend the current
953 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
956 /* Otherwise this is a bad ack; ignore it. Increment the
957 garbage count to ensure that we do not stay in this loop
963 mips_error ("Remote did not acknowledge packet");
966 /* Receive and acknowledge a packet, returning the data in BUFF (which
967 should be DATA_MAXLEN + 1 bytes). The protocol documentation
968 implies that only the sender retransmits packets, so this code just
969 waits silently for a packet. It returns the length of the received
970 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
971 don't print an error message and return -1. */
974 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
979 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
986 unsigned char hdr
[HDR_LENGTH
];
987 unsigned char trlr
[TRLR_LENGTH
];
991 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
994 mips_error ("Timed out waiting for remote packet");
1001 /* An acknowledgement is probably a duplicate; ignore it. */
1002 if (!HDR_IS_DATA (hdr
))
1004 len
= HDR_GET_LEN (hdr
);
1005 /* Check if the length is valid for an ACK, we may aswell
1006 try and read the remainder of the packet: */
1009 /* Ignore the error condition, since we are going to
1010 ignore the packet anyway. */
1011 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1013 /* Don't use _filtered; we can't deal with a QUIT out of
1014 target_wait, and I think this might be called from there. */
1015 if (remote_debug
> 0)
1016 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1020 len
= HDR_GET_LEN (hdr
);
1021 for (i
= 0; i
< len
; i
++)
1025 rch
= mips_readchar (timeout
);
1031 if (rch
== SERIAL_TIMEOUT
)
1034 mips_error ("Timed out waiting for remote packet");
1043 /* Don't use _filtered; we can't deal with a QUIT out of
1044 target_wait, and I think this might be called from there. */
1045 if (remote_debug
> 0)
1046 fprintf_unfiltered (gdb_stdlog
,
1047 "Got new SYN after %d chars (wanted %d)\n",
1052 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1056 mips_error ("Timed out waiting for packet");
1062 /* Don't use _filtered; we can't deal with a QUIT out of
1063 target_wait, and I think this might be called from there. */
1064 if (remote_debug
> 0)
1065 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1069 /* If this is the wrong sequence number, ignore it. */
1070 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1072 /* Don't use _filtered; we can't deal with a QUIT out of
1073 target_wait, and I think this might be called from there. */
1074 if (remote_debug
> 0)
1075 fprintf_unfiltered (gdb_stdlog
,
1076 "Ignoring sequence number %d (want %d)\n",
1077 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1081 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1084 if (remote_debug
> 0)
1085 /* Don't use _filtered; we can't deal with a QUIT out of
1086 target_wait, and I think this might be called from there. */
1087 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1088 mips_cksum (hdr
, buff
, len
),
1089 TRLR_GET_CKSUM (trlr
));
1091 /* The checksum failed. Send an acknowledgement for the
1092 previous packet to tell the remote to resend the packet. */
1093 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1094 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1095 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1096 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1098 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1100 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1101 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1102 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1104 if (remote_debug
> 0)
1106 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1107 /* Don't use _filtered; we can't deal with a QUIT out of
1108 target_wait, and I think this might be called from there. */
1109 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1113 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1116 mips_error ("write to target failed: %s", safe_strerror (errno
));
1122 if (remote_debug
> 0)
1125 /* Don't use _filtered; we can't deal with a QUIT out of
1126 target_wait, and I think this might be called from there. */
1127 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1130 /* We got the packet. Send an acknowledgement. */
1131 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1133 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1134 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1135 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1136 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1138 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1140 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1141 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1142 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1144 if (remote_debug
> 0)
1146 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1147 /* Don't use _filtered; we can't deal with a QUIT out of
1148 target_wait, and I think this might be called from there. */
1149 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1153 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1156 mips_error ("write to target failed: %s", safe_strerror (errno
));
1164 /* Optionally send a request to the remote system and optionally wait
1165 for the reply. This implements the remote debugging protocol,
1166 which is built on top of the packet protocol defined above. Each
1167 request has an ADDR argument and a DATA argument. The following
1168 requests are defined:
1170 \0 don't send a request; just wait for a reply
1171 i read word from instruction space at ADDR
1172 d read word from data space at ADDR
1173 I write DATA to instruction space at ADDR
1174 D write DATA to data space at ADDR
1175 r read register number ADDR
1176 R set register number ADDR to value DATA
1177 c continue execution (if ADDR != 1, set pc to ADDR)
1178 s single step (if ADDR != 1, set pc to ADDR)
1180 The read requests return the value requested. The write requests
1181 return the previous value in the changed location. The execution
1182 requests return a UNIX wait value (the approximate signal which
1183 caused execution to stop is in the upper eight bits).
1185 If PERR is not NULL, this function waits for a reply. If an error
1186 occurs, it sets *PERR to 1 and sets errno according to what the
1187 target board reports. */
1190 mips_request (int cmd
,
1197 char myBuff
[DATA_MAXLEN
+ 1];
1202 unsigned long rresponse
;
1204 if (buff
== (char *) NULL
)
1209 if (mips_need_reply
)
1210 internal_error (__FILE__
, __LINE__
,
1211 _("mips_request: Trying to send command before reply"));
1212 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1213 mips_send_packet (buff
, 1);
1214 mips_need_reply
= 1;
1217 if (perr
== (int *) NULL
)
1220 if (!mips_need_reply
)
1221 internal_error (__FILE__
, __LINE__
,
1222 _("mips_request: Trying to get reply before command"));
1224 mips_need_reply
= 0;
1226 len
= mips_receive_packet (buff
, 1, timeout
);
1229 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1230 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1231 || (cmd
!= '\0' && rcmd
!= cmd
))
1232 mips_error ("Bad response from remote board");
1238 /* FIXME: This will returns MIPS errno numbers, which may or may
1239 not be the same as errno values used on other systems. If
1240 they stick to common errno values, they will be the same, but
1241 if they don't, they must be translated. */
1252 mips_initialize_cleanups (void *arg
)
1254 mips_initializing
= 0;
1258 mips_exit_cleanups (void *arg
)
1264 mips_send_command (const char *cmd
, int prompt
)
1266 serial_write (mips_desc
, cmd
, strlen (cmd
));
1270 mips_expect (mips_monitor_prompt
);
1273 /* Enter remote (dbx) debug mode: */
1275 mips_enter_debug (void)
1277 /* Reset the sequence numbers, ready for the new debug sequence: */
1279 mips_receive_seq
= 0;
1281 if (mips_monitor
!= MON_IDT
)
1282 mips_send_command ("debug\r", 0);
1283 else /* assume IDT monitor by default */
1284 mips_send_command ("db tty0\r", 0);
1287 serial_write (mips_desc
, "\r", sizeof "\r" - 1);
1289 /* We don't need to absorb any spurious characters here, since the
1290 mips_receive_header will eat up a reasonable number of characters
1291 whilst looking for the SYN, however this avoids the "garbage"
1292 being displayed to the user. */
1293 if (mips_monitor
!= MON_IDT
)
1297 char buff
[DATA_MAXLEN
+ 1];
1298 if (mips_receive_packet (buff
, 1, 3) < 0)
1299 mips_error ("Failed to initialize (didn't receive packet).");
1303 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1305 mips_exit_debug (void)
1308 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1312 if (mips_monitor
!= MON_IDT
)
1314 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1315 so we do not get a reply to this command: */
1316 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1317 mips_need_reply
= 0;
1318 if (!mips_expect (" break!"))
1322 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1324 if (!mips_expect (mips_monitor_prompt
))
1327 do_cleanups (old_cleanups
);
1332 /* Initialize a new connection to the MIPS board, and make sure we are
1333 really connected. */
1336 mips_initialize (void)
1339 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1342 /* What is this code doing here? I don't see any way it can happen, and
1343 it might mean mips_initializing didn't get cleared properly.
1344 So I'll make it a warning. */
1346 if (mips_initializing
)
1348 warning ("internal error: mips_initialize called twice");
1353 mips_initializing
= 1;
1355 /* At this point, the packit protocol isn't responding. We'll try getting
1356 into the monitor, and restarting the protocol. */
1358 /* Force the system into the monitor. After this we *should* be at
1359 the mips_monitor_prompt. */
1360 if (mips_monitor
!= MON_IDT
)
1361 j
= 0; /* start by checking if we are already at the prompt */
1363 j
= 1; /* start by sending a break */
1368 case 0: /* First, try sending a CR */
1369 serial_flush_input (mips_desc
);
1370 serial_write (mips_desc
, "\r", 1);
1372 case 1: /* First, try sending a break */
1373 serial_send_break (mips_desc
);
1375 case 2: /* Then, try a ^C */
1376 serial_write (mips_desc
, "\003", 1);
1378 case 3: /* Then, try escaping from download */
1380 if (mips_monitor
!= MON_IDT
)
1384 /* We shouldn't need to send multiple termination
1385 sequences, since the target performs line (or
1386 block) reads, and then processes those
1387 packets. In-case we were downloading a large packet
1388 we flush the output buffer before inserting a
1389 termination sequence. */
1390 serial_flush_output (mips_desc
);
1391 sprintf (tbuff
, "\r/E/E\r");
1392 serial_write (mips_desc
, tbuff
, 6);
1399 /* We are possibly in binary download mode, having
1400 aborted in the middle of an S-record. ^C won't
1401 work because of binary mode. The only reliable way
1402 out is to send enough termination packets (8 bytes)
1403 to fill up and then overflow the largest size
1404 S-record (255 bytes in this case). This amounts to
1408 mips_make_srec (srec
, '7', 0, NULL
, 0);
1410 for (i
= 1; i
<= 33; i
++)
1412 serial_write (mips_desc
, srec
, 8);
1414 if (serial_readchar (mips_desc
, 0) >= 0)
1415 break; /* Break immediatly if we get something from
1422 mips_error ("Failed to initialize.");
1425 if (mips_expect (mips_monitor_prompt
))
1429 if (mips_monitor
!= MON_IDT
)
1431 /* Sometimes PMON ignores the first few characters in the first
1432 command sent after a load. Sending a blank command gets
1434 mips_send_command ("\r", -1);
1436 /* Ensure the correct target state: */
1437 if (mips_monitor
!= MON_LSI
)
1438 mips_send_command ("set regsize 64\r", -1);
1439 mips_send_command ("set hostport tty0\r", -1);
1440 mips_send_command ("set brkcmd \"\"\r", -1);
1441 /* Delete all the current breakpoints: */
1442 mips_send_command ("db *\r", -1);
1443 /* NOTE: PMON does not have breakpoint support through the
1444 "debug" mode, only at the monitor command-line. */
1447 mips_enter_debug ();
1449 /* Clear all breakpoints: */
1450 if ((mips_monitor
== MON_IDT
1451 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1452 || mips_monitor
== MON_LSI
)
1453 monitor_supports_breakpoints
= 1;
1455 monitor_supports_breakpoints
= 0;
1457 do_cleanups (old_cleanups
);
1459 /* If this doesn't call error, we have connected; we don't care if
1460 the request itself succeeds or fails. */
1462 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1465 /* Open a connection to the remote board. */
1467 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1468 enum mips_monitor_type new_monitor
,
1469 const char *new_monitor_prompt
)
1472 char *serial_port_name
;
1473 char *remote_name
= 0;
1474 char *local_name
= 0;
1479 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1480 device is attached to the target board (e.g., /dev/ttya).\n"
1481 "If you want to use TFTP to download to the board, specify the name of a\n"
1482 "temporary file to be used by GDB for downloads as the second argument.\n"
1483 "This filename must be in the form host:filename, where host is the name\n"
1484 "of the host running the TFTP server, and the file must be readable by the\n"
1485 "world. If the local name of the temporary file differs from the name as\n"
1486 "seen from the board via TFTP, specify that name as the third parameter.\n");
1488 /* Parse the serial port name, the optional TFTP name, and the
1489 optional local TFTP name. */
1490 argv
= gdb_buildargv (name
);
1491 make_cleanup_freeargv (argv
);
1493 serial_port_name
= xstrdup (argv
[0]);
1494 if (argv
[1]) /* remote TFTP name specified? */
1496 remote_name
= argv
[1];
1497 if (argv
[2]) /* local TFTP filename specified? */
1498 local_name
= argv
[2];
1501 target_preopen (from_tty
);
1504 unpush_target (current_ops
);
1506 /* Open and initialize the serial port. */
1507 mips_desc
= serial_open (serial_port_name
);
1508 if (mips_desc
== NULL
)
1509 perror_with_name (serial_port_name
);
1511 if (baud_rate
!= -1)
1513 if (serial_setbaudrate (mips_desc
, baud_rate
))
1515 serial_close (mips_desc
);
1516 perror_with_name (serial_port_name
);
1520 serial_raw (mips_desc
);
1522 /* Open and initialize the optional download port. If it is in the form
1523 hostname#portnumber, it's a UDP socket. If it is in the form
1524 hostname:filename, assume it's the TFTP filename that must be
1525 passed to the DDB board to tell it where to get the load file. */
1528 if (strchr (remote_name
, '#'))
1530 udp_desc
= serial_open (remote_name
);
1532 perror_with_name ("Unable to open UDP port");
1537 /* Save the remote and local names of the TFTP temp file. If
1538 the user didn't specify a local name, assume it's the same
1539 as the part of the remote name after the "host:". */
1543 xfree (tftp_localname
);
1544 if (local_name
== NULL
)
1545 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1546 local_name
++; /* skip over the colon */
1547 if (local_name
== NULL
)
1548 local_name
= remote_name
; /* local name same as remote name */
1549 tftp_name
= xstrdup (remote_name
);
1550 tftp_localname
= xstrdup (local_name
);
1558 /* Reset the expected monitor prompt if it's never been set before. */
1559 if (mips_monitor_prompt
== NULL
)
1560 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1561 mips_monitor
= new_monitor
;
1566 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1568 /* Switch to using remote target now. */
1571 /* FIXME: Should we call start_remote here? */
1573 /* Try to figure out the processor model if possible. */
1574 deprecated_mips_set_processor_regs_hack ();
1576 /* This is really the job of start_remote however, that makes an
1577 assumption that the target is about to print out a status message
1578 of some sort. That doesn't happen here (in fact, it may not be
1579 possible to get the monitor to send the appropriate packet). */
1581 reinit_frame_cache ();
1582 registers_changed ();
1583 stop_pc
= read_pc ();
1584 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
);
1585 xfree (serial_port_name
);
1589 mips_open (char *name
, int from_tty
)
1591 const char *monitor_prompt
= NULL
;
1592 if (gdbarch_bfd_arch_info (target_gdbarch
) != NULL
1593 && gdbarch_bfd_arch_info (target_gdbarch
)->arch
== bfd_arch_mips
)
1595 switch (gdbarch_bfd_arch_info (target_gdbarch
)->mach
)
1597 case bfd_mach_mips4100
:
1598 case bfd_mach_mips4300
:
1599 case bfd_mach_mips4600
:
1600 case bfd_mach_mips4650
:
1601 case bfd_mach_mips5000
:
1602 monitor_prompt
= "<RISQ> ";
1606 if (monitor_prompt
== NULL
)
1607 monitor_prompt
= "<IDT>";
1608 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1612 pmon_open (char *name
, int from_tty
)
1614 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1618 ddb_open (char *name
, int from_tty
)
1620 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1624 lsi_open (char *name
, int from_tty
)
1628 /* Clear the LSI breakpoint table. */
1629 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1630 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1632 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1635 /* Close a connection to the remote board. */
1638 mips_close (int quitting
)
1642 /* Get the board out of remote debugging mode. */
1643 (void) mips_exit_debug ();
1649 /* Detach from the remote board. */
1652 mips_detach (struct target_ops
*ops
, char *args
, int from_tty
)
1655 error ("Argument given to \"detach\" when remotely debugging.");
1662 printf_unfiltered ("Ending remote MIPS debugging.\n");
1665 /* Tell the target board to resume. This does not wait for a reply
1666 from the board, except in the case of single-stepping on LSI boards,
1667 where PMON does return a reply. */
1670 mips_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
1674 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1675 a single step, so we wait for that. */
1676 mips_request (step
? 's' : 'c', 1, siggnal
,
1677 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1678 mips_receive_wait
, NULL
);
1681 /* Return the signal corresponding to SIG, where SIG is the number which
1682 the MIPS protocol uses for the signal. */
1683 static enum target_signal
1684 mips_signal_from_protocol (int sig
)
1686 /* We allow a few more signals than the IDT board actually returns, on
1687 the theory that there is at least *some* hope that perhaps the numbering
1688 for these signals is widely agreed upon. */
1691 return TARGET_SIGNAL_UNKNOWN
;
1693 /* Don't want to use target_signal_from_host because we are converting
1694 from MIPS signal numbers, not host ones. Our internal numbers
1695 match the MIPS numbers for the signals the board can return, which
1696 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1697 return (enum target_signal
) sig
;
1700 /* Wait until the remote stops, and return a wait status. */
1703 mips_wait (struct target_ops
*ops
,
1704 ptid_t ptid
, struct target_waitstatus
*status
)
1708 char buff
[DATA_MAXLEN
];
1714 interrupt_count
= 0;
1717 /* If we have not sent a single step or continue command, then the
1718 board is waiting for us to do something. Return a status
1719 indicating that it is stopped. */
1720 if (!mips_need_reply
)
1722 status
->kind
= TARGET_WAITKIND_STOPPED
;
1723 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1724 return inferior_ptid
;
1727 /* No timeout; we sit here as long as the program continues to execute. */
1729 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1732 mips_error ("Remote failure: %s", safe_strerror (errno
));
1734 /* On returning from a continue, the PMON monitor seems to start
1735 echoing back the messages we send prior to sending back the
1736 ACK. The code can cope with this, but to try and avoid the
1737 unnecessary serial traffic, and "spurious" characters displayed
1738 to the user, we cheat and reset the debug protocol. The problems
1739 seems to be caused by a check on the number of arguments, and the
1740 command length, within the monitor causing it to echo the command
1742 if (mips_monitor
== MON_PMON
)
1745 mips_enter_debug ();
1748 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1750 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1751 &rpc
, &rfp
, &rsp
, flags
);
1754 struct regcache
*regcache
= get_current_regcache ();
1755 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1756 char buf
[MAX_REGISTER_SIZE
];
1758 store_unsigned_integer (buf
,
1760 (gdbarch
, gdbarch_pc_regnum (gdbarch
)), rpc
);
1761 regcache_raw_supply (regcache
, gdbarch_pc_regnum (gdbarch
), buf
);
1763 store_unsigned_integer
1764 (buf
, register_size (gdbarch
, gdbarch_pc_regnum (gdbarch
)), rfp
);
1765 regcache_raw_supply (regcache
, 30, buf
); /* This register they are avoiding and so it is unnamed */
1767 store_unsigned_integer (buf
, register_size (gdbarch
,
1768 gdbarch_sp_regnum (gdbarch
)), rsp
);
1769 regcache_raw_supply (regcache
, gdbarch_sp_regnum (gdbarch
), buf
);
1771 store_unsigned_integer (buf
,
1772 register_size (gdbarch
,
1773 gdbarch_deprecated_fp_regnum
1776 regcache_raw_supply (regcache
,
1777 gdbarch_deprecated_fp_regnum (gdbarch
), buf
);
1783 for (i
= 0; i
<= 2; i
++)
1784 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1786 else if (flags
[i
] == '\000')
1791 if (strcmp (target_shortname
, "lsi") == 0)
1794 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1795 Right now, PMON doesn't give us enough information to determine which
1796 breakpoint we hit. So we have to look up the PC in our own table
1797 of breakpoints, and if found, assume it's just a normal instruction
1798 fetch breakpoint, not a data watchpoint. FIXME when PMON
1799 provides some way to tell us what type of breakpoint it is. */
1801 CORE_ADDR pc
= read_pc ();
1804 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1806 if (lsi_breakpoints
[i
].addr
== pc
1807 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1814 /* If a data breakpoint was hit, PMON returns the following packet:
1816 The return packet from an ordinary breakpoint doesn't have the
1817 extra 0x01 field tacked onto the end. */
1818 if (nfields
== 1 && rpc
== 1)
1823 /* NOTE: The following (sig) numbers are defined by PMON:
1824 SPP_SIGTRAP 5 breakpoint
1832 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1833 and so on, because the constants we want here are determined by the
1834 MIPS protocol and have nothing to do with what host we are running on. */
1835 if ((rstatus
& 0xff) == 0)
1837 status
->kind
= TARGET_WAITKIND_EXITED
;
1838 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1840 else if ((rstatus
& 0xff) == 0x7f)
1842 status
->kind
= TARGET_WAITKIND_STOPPED
;
1843 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1845 /* If the stop PC is in the _exit function, assume
1846 we hit the 'break 0x3ff' instruction in _exit, so this
1847 is not a normal breakpoint. */
1848 if (strcmp (target_shortname
, "lsi") == 0)
1851 CORE_ADDR func_start
;
1852 CORE_ADDR pc
= read_pc ();
1854 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1855 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1856 && func_start
== pc
)
1857 status
->kind
= TARGET_WAITKIND_EXITED
;
1862 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1863 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1866 return inferior_ptid
;
1869 /* We have to map between the register numbers used by gdb and the
1870 register numbers used by the debugging protocol. */
1872 #define REGNO_OFFSET 96
1875 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1879 if (regno
>= mips_regnum (gdbarch
)->fp0
1880 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1881 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1882 else if (regno
== mips_regnum (gdbarch
)->pc
)
1883 return REGNO_OFFSET
+ 0;
1884 else if (regno
== mips_regnum (gdbarch
)->cause
)
1885 return REGNO_OFFSET
+ 1;
1886 else if (regno
== mips_regnum (gdbarch
)->hi
)
1887 return REGNO_OFFSET
+ 2;
1888 else if (regno
== mips_regnum (gdbarch
)->lo
)
1889 return REGNO_OFFSET
+ 3;
1890 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
1891 return REGNO_OFFSET
+ 4;
1892 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
1893 return REGNO_OFFSET
+ 5;
1895 /* FIXME: Is there a way to get the status register? */
1899 /* Fetch the remote registers. */
1902 mips_fetch_registers (struct regcache
*regcache
, int regno
)
1904 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1905 unsigned LONGEST val
;
1910 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
1911 mips_fetch_registers (regcache
, regno
);
1915 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
1916 || regno
== MIPS_ZERO_REGNUM
)
1917 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
1918 supposed to read zero (see also mips-nat.c). */
1922 /* If PMON doesn't support this register, don't waste serial
1923 bandwidth trying to read it. */
1924 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
1925 if (regno
!= 0 && pmon_reg
== 0)
1929 /* Unfortunately the PMON version in the Vr4300 board has been
1930 compiled without the 64bit register access commands. This
1931 means we cannot get hold of the full register width. */
1932 if (mips_monitor
== MON_DDB
)
1933 val
= (unsigned) mips_request ('t', pmon_reg
, 0,
1934 &err
, mips_receive_wait
, NULL
);
1936 val
= mips_request ('r', pmon_reg
, 0,
1937 &err
, mips_receive_wait
, NULL
);
1939 mips_error ("Can't read register %d: %s", regno
,
1940 safe_strerror (errno
));
1945 char buf
[MAX_REGISTER_SIZE
];
1947 /* We got the number the register holds, but gdb expects to see a
1948 value in the target byte ordering. */
1949 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), val
);
1950 regcache_raw_supply (regcache
, regno
, buf
);
1954 /* Prepare to store registers. The MIPS protocol can store individual
1955 registers, so this function doesn't have to do anything. */
1958 mips_prepare_to_store (struct regcache
*regcache
)
1962 /* Store remote register(s). */
1965 mips_store_registers (struct regcache
*regcache
, int regno
)
1967 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1973 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
1974 mips_store_registers (regcache
, regno
);
1978 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
1979 mips_request ('R', mips_map_regno (gdbarch
, regno
), val
,
1980 &err
, mips_receive_wait
, NULL
);
1982 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
1985 /* Fetch a word from the target board. */
1988 mips_fetch_word (CORE_ADDR addr
)
1993 val
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
1996 /* Data space failed; try instruction space. */
1997 val
= mips_request ('i', addr
, 0, &err
,
1998 mips_receive_wait
, NULL
);
2000 mips_error ("Can't read address 0x%s: %s",
2001 paddr_nz (addr
), safe_strerror (errno
));
2006 /* Store a word to the target board. Returns errno code or zero for
2007 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2008 memory location there. */
2010 /* FIXME! make sure only 32-bit quantities get stored! */
2012 mips_store_word (CORE_ADDR addr
, unsigned int val
, char *old_contents
)
2015 unsigned int oldcontents
;
2017 oldcontents
= mips_request ('D', addr
, val
, &err
,
2018 mips_receive_wait
, NULL
);
2021 /* Data space failed; try instruction space. */
2022 oldcontents
= mips_request ('I', addr
, val
, &err
,
2023 mips_receive_wait
, NULL
);
2027 if (old_contents
!= NULL
)
2028 store_unsigned_integer (old_contents
, 4, oldcontents
);
2032 /* Read or write LEN bytes from inferior memory at MEMADDR,
2033 transferring to or from debugger address MYADDR. Write to inferior
2034 if SHOULD_WRITE is nonzero. Returns length of data written or
2035 read; 0 for error. Note that protocol gives us the correct value
2036 for a longword, since it transfers values in ASCII. We want the
2037 byte values, so we have to swap the longword values. */
2039 static int mask_address_p
= 1;
2042 mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
, int write
,
2043 struct mem_attrib
*attrib
, struct target_ops
*target
)
2051 /* PMON targets do not cope well with 64 bit addresses. Mask the
2052 value down to 32 bits. */
2054 memaddr
&= (CORE_ADDR
) 0xffffffff;
2056 /* Round starting address down to longword boundary. */
2057 addr
= memaddr
& ~3;
2058 /* Round ending address up; get number of longwords that makes. */
2059 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2060 /* Allocate buffer of that many longwords. */
2061 buffer
= alloca (count
* 4);
2065 /* Fill start and end extra bytes of buffer with existing data. */
2066 if (addr
!= memaddr
|| len
< 4)
2068 /* Need part of initial word -- fetch it. */
2069 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2074 /* Need part of last word -- fetch it. FIXME: we do this even
2075 if we don't need it. */
2076 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2077 mips_fetch_word (addr
+ (count
- 1) * 4));
2080 /* Copy data to be written over corresponding part of buffer */
2082 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2084 /* Write the entire buffer. */
2086 for (i
= 0; i
< count
; i
++, addr
+= 4)
2088 status
= mips_store_word (addr
,
2089 extract_unsigned_integer (&buffer
[i
* 4], 4),
2091 /* Report each kilobyte (we download 32-bit words at a time) */
2094 printf_unfiltered ("*");
2095 gdb_flush (gdb_stdout
);
2102 /* FIXME: Do we want a QUIT here? */
2105 printf_unfiltered ("\n");
2109 /* Read all the longwords */
2110 for (i
= 0; i
< count
; i
++, addr
+= 4)
2112 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2116 /* Copy appropriate bytes out of the buffer. */
2117 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2122 /* Print info on this target. */
2125 mips_files_info (struct target_ops
*ignore
)
2127 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2130 /* Kill the process running on the board. This will actually only
2131 work if we are doing remote debugging over the console input. I
2132 think that if IDT/sim had the remote debug interrupt enabled on the
2133 right port, we could interrupt the process with a break signal. */
2138 if (!mips_wait_flag
)
2143 if (interrupt_count
>= 2)
2145 interrupt_count
= 0;
2147 target_terminal_ours ();
2149 if (query ("Interrupted while waiting for the program.\n\
2150 Give up (and stop debugging it)? "))
2152 /* Clean up in such a way that mips_close won't try to talk to the
2153 board (it almost surely won't work since we weren't able to talk to
2158 printf_unfiltered ("Ending remote MIPS debugging.\n");
2159 target_mourn_inferior ();
2161 deprecated_throw_reason (RETURN_QUIT
);
2164 target_terminal_inferior ();
2167 if (remote_debug
> 0)
2168 printf_unfiltered ("Sending break\n");
2170 serial_send_break (mips_desc
);
2179 serial_write (mips_desc
, &cc
, 1);
2181 target_mourn_inferior ();
2186 /* Start running on the target board. */
2189 mips_create_inferior (char *execfile
, char *args
, char **env
, int from_tty
)
2196 Can't pass arguments to remote MIPS board; arguments ignored.");
2197 /* And don't try to use them on the next "run" command. */
2198 execute_command ("set args", 0);
2201 if (execfile
== 0 || exec_bfd
== 0)
2202 error ("No executable file specified");
2204 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2206 init_wait_for_inferior ();
2208 /* FIXME: Should we set inferior_ptid here? */
2210 write_pc (entry_pt
);
2213 /* Clean up after a process. Actually nothing to do. */
2216 mips_mourn_inferior (void)
2218 if (current_ops
!= NULL
)
2219 unpush_target (current_ops
);
2220 generic_mourn_inferior ();
2223 /* We can write a breakpoint and read the shadow contents in one
2226 /* Insert a breakpoint. On targets that don't have built-in
2227 breakpoint support, we read the contents of the target location and
2228 stash it, then overwrite it with a breakpoint instruction. ADDR is
2229 the target location in the target machine. BPT is the breakpoint
2230 being inserted or removed, which contains memory for saving the
2234 mips_insert_breakpoint (struct bp_target_info
*bp_tgt
)
2236 if (monitor_supports_breakpoints
)
2237 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2240 return memory_insert_breakpoint (bp_tgt
);
2244 mips_remove_breakpoint (struct bp_target_info
*bp_tgt
)
2246 if (monitor_supports_breakpoints
)
2247 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2250 return memory_remove_breakpoint (bp_tgt
);
2253 /* Tell whether this target can support a hardware breakpoint. CNT
2254 is the number of hardware breakpoints already installed. This
2255 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2258 mips_can_use_watchpoint (int type
, int cnt
, int othertype
)
2260 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2264 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2265 This is used for memory ref breakpoints. */
2267 static unsigned long
2268 calculate_mask (CORE_ADDR addr
, int len
)
2273 mask
= addr
^ (addr
+ len
- 1);
2275 for (i
= 32; i
>= 0; i
--)
2281 mask
= (unsigned long) 0xffffffff >> i
;
2287 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2288 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2292 mips_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
2294 if (mips_set_breakpoint (addr
, len
, type
))
2301 mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
2303 if (mips_clear_breakpoint (addr
, len
, type
))
2310 mips_stopped_by_watchpoint (void)
2312 return hit_watchpoint
;
2316 /* Insert a breakpoint. */
2319 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2321 return mips_common_breakpoint (1, addr
, len
, type
);
2325 /* Clear a breakpoint. */
2328 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2330 return mips_common_breakpoint (0, addr
, len
, type
);
2334 /* Check the error code from the return packet for an LSI breakpoint
2335 command. If there's no error, just return 0. If it's a warning,
2336 print the warning text and return 0. If it's an error, print
2337 the error text and return 1. <ADDR> is the address of the breakpoint
2338 that was being set. <RERRFLG> is the error code returned by PMON.
2339 This is a helper function for mips_common_breakpoint. */
2342 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2344 struct lsi_error
*err
;
2345 char *saddr
= paddr_nz (addr
); /* printable address string */
2347 if (rerrflg
== 0) /* no error */
2350 /* Warnings can be ORed together, so check them all. */
2351 if (rerrflg
& W_WARN
)
2353 if (monitor_warnings
)
2356 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2358 if ((err
->code
& rerrflg
) == err
->code
)
2361 fprintf_unfiltered (gdb_stderr
, "\
2362 mips_common_breakpoint (0x%s): Warning: %s\n",
2368 fprintf_unfiltered (gdb_stderr
, "\
2369 mips_common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2376 /* Errors are unique, i.e. can't be ORed together. */
2377 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2379 if ((err
->code
& rerrflg
) == err
->code
)
2381 fprintf_unfiltered (gdb_stderr
, "\
2382 mips_common_breakpoint (0x%s): Error: %s\n",
2388 fprintf_unfiltered (gdb_stderr
, "\
2389 mips_common_breakpoint (0x%s): Unknown error: 0x%x\n",
2396 /* This routine sends a breakpoint command to the remote target.
2398 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2399 <ADDR> is the address of the breakpoint.
2400 <LEN> the length of the region to break on.
2401 <TYPE> is the type of breakpoint:
2402 0 = write (BREAK_WRITE)
2403 1 = read (BREAK_READ)
2404 2 = read/write (BREAK_ACCESS)
2405 3 = instruction fetch (BREAK_FETCH)
2407 Return 0 if successful; otherwise 1. */
2410 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2412 char buf
[DATA_MAXLEN
+ 1];
2414 int rpid
, rerrflg
, rresponse
, rlen
;
2417 addr
= gdbarch_addr_bits_remove (target_gdbarch
, addr
);
2419 if (mips_monitor
== MON_LSI
)
2421 if (set
== 0) /* clear breakpoint */
2423 /* The LSI PMON "clear breakpoint" has this form:
2424 <pid> 'b' <bptn> 0x0
2426 <pid> 'b' 0x0 <code>
2428 <bptn> is a breakpoint number returned by an earlier 'B' command.
2429 Possible return codes: OK, E_BPT. */
2433 /* Search for the breakpoint in the table. */
2434 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2435 if (lsi_breakpoints
[i
].type
== type
2436 && lsi_breakpoints
[i
].addr
== addr
2437 && lsi_breakpoints
[i
].len
== len
)
2440 /* Clear the table entry and tell PMON to clear the breakpoint. */
2441 if (i
== MAX_LSI_BREAKPOINTS
)
2444 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2449 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2450 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2451 mips_send_packet (buf
, 1);
2453 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2456 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2459 mips_common_breakpoint: Bad response from remote board: %s",
2462 return (mips_check_lsi_error (addr
, rerrflg
));
2465 /* set a breakpoint */
2467 /* The LSI PMON "set breakpoint" command has this form:
2468 <pid> 'B' <addr> 0x0
2470 <pid> 'B' <bptn> <code>
2472 The "set data breakpoint" command has this form:
2474 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2476 where: type= "0x1" = read
2478 "0x3" = access (read or write)
2480 The reply returns two values:
2481 bptn - a breakpoint number, which is a small integer with
2482 possible values of zero through 255.
2483 code - an error return code, a value of zero indicates a
2484 succesful completion, other values indicate various
2485 errors and warnings.
2487 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2491 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2494 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2500 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2501 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2502 paddr_nz (addr
+ len
- 1));
2504 mips_send_packet (buf
, 1);
2506 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2509 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2510 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2511 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2513 mips_common_breakpoint: Bad response from remote board: %s",
2517 if (mips_check_lsi_error (addr
, rerrflg
))
2520 /* rresponse contains PMON's breakpoint number. Record the
2521 information for this breakpoint so we can clear it later. */
2522 lsi_breakpoints
[rresponse
].type
= type
;
2523 lsi_breakpoints
[rresponse
].addr
= addr
;
2524 lsi_breakpoints
[rresponse
].len
= len
;
2531 /* On non-LSI targets, the breakpoint command has this form:
2532 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2533 <MASK> is a don't care mask for addresses.
2534 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2538 mask
= calculate_mask (addr
, len
);
2541 if (set
) /* set a breakpoint */
2546 case BREAK_WRITE
: /* write */
2549 case BREAK_READ
: /* read */
2552 case BREAK_ACCESS
: /* read/write */
2555 case BREAK_FETCH
: /* fetch */
2559 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
2563 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2564 paddr_nz (mask
), flags
);
2569 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2572 mips_send_packet (buf
, 1);
2574 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2577 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2578 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2580 if (nfields
!= 4 || rcmd
!= cmd
)
2582 mips_common_breakpoint: Bad response from remote board: %s",
2587 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2588 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2589 if (mips_monitor
== MON_DDB
)
2590 rresponse
= rerrflg
;
2591 if (rresponse
!= 22) /* invalid argument */
2592 fprintf_unfiltered (gdb_stderr
, "\
2593 mips_common_breakpoint (0x%s): Got error: 0x%x\n",
2594 paddr_nz (addr
), rresponse
);
2602 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2608 serial_write (mips_desc
, srec
, len
);
2610 ch
= mips_readchar (remote_timeout
);
2614 case SERIAL_TIMEOUT
:
2615 error ("Timeout during download.");
2619 case 0x15: /* NACK */
2620 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte 0x%s! Retrying.\n", paddr_nz (addr
));
2623 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2628 /* Download a binary file by converting it to S records. */
2631 mips_load_srec (char *args
)
2635 char *buffer
, srec
[1024];
2637 unsigned int srec_frame
= 200;
2639 static int hashmark
= 1;
2641 buffer
= alloca (srec_frame
* 2 + 256);
2643 abfd
= bfd_openr (args
, 0);
2646 printf_filtered ("Unable to open file %s\n", args
);
2650 if (bfd_check_format (abfd
, bfd_object
) == 0)
2652 printf_filtered ("File is not an object file\n");
2656 /* This actually causes a download in the IDT binary format: */
2657 mips_send_command (LOAD_CMD
, 0);
2659 for (s
= abfd
->sections
; s
; s
= s
->next
)
2661 if (s
->flags
& SEC_LOAD
)
2663 unsigned int numbytes
;
2665 /* FIXME! vma too small????? */
2666 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2668 (long) (s
->vma
+ bfd_get_section_size (s
)));
2669 gdb_flush (gdb_stdout
);
2671 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2673 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2675 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2677 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2679 send_srec (srec
, reclen
, s
->vma
+ i
);
2681 if (deprecated_ui_load_progress_hook
)
2682 deprecated_ui_load_progress_hook (s
->name
, i
);
2686 putchar_unfiltered ('#');
2687 gdb_flush (gdb_stdout
);
2690 } /* Per-packet (or S-record) loop */
2692 putchar_unfiltered ('\n');
2693 } /* Loadable sections */
2696 putchar_unfiltered ('\n');
2698 /* Write a type 7 terminator record. no data for a type 7, and there
2699 is no data, so len is 0. */
2701 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2703 send_srec (srec
, reclen
, abfd
->start_address
);
2705 serial_flush_input (mips_desc
);
2709 * mips_make_srec -- make an srecord. This writes each line, one at a
2710 * time, each with it's own header and trailer line.
2711 * An srecord looks like this:
2713 * byte count-+ address
2714 * start ---+ | | data +- checksum
2716 * S01000006F6B692D746573742E73726563E4
2717 * S315000448600000000000000000FC00005900000000E9
2718 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2719 * S30B0004485A0000000000004E
2722 * S<type><length><address><data><checksum>
2726 * is the number of bytes following upto the checksum. Note that
2727 * this is not the number of chars following, since it takes two
2728 * chars to represent a byte.
2732 * 1) two byte address data record
2733 * 2) three byte address data record
2734 * 3) four byte address data record
2735 * 7) four byte address termination record
2736 * 8) three byte address termination record
2737 * 9) two byte address termination record
2740 * is the start address of the data following, or in the case of
2741 * a termination record, the start address of the image
2745 * is the sum of all the raw byte data in the record, from the length
2746 * upwards, modulo 256 and subtracted from 255.
2748 * This routine returns the length of the S-record.
2753 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2756 unsigned char checksum
;
2759 /* Create the header for the srec. addr_size is the number of bytes in the address,
2760 and 1 is the number of bytes in the count. */
2762 /* FIXME!! bigger buf required for 64-bit! */
2765 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2766 /* This assumes S3 style downloads (4byte addresses). There should
2767 probably be a check, or the code changed to make it more
2769 buf
[3] = memaddr
>> 24;
2770 buf
[4] = memaddr
>> 16;
2771 buf
[5] = memaddr
>> 8;
2773 memcpy (&buf
[7], myaddr
, len
);
2775 /* Note that the checksum is calculated on the raw data, not the
2776 hexified data. It includes the length, address and the data
2777 portions of the packet. */
2779 buf
+= 2; /* Point at length byte */
2780 for (i
= 0; i
< len
+ 4 + 1; i
++)
2788 /* The following manifest controls whether we enable the simple flow
2789 control support provided by the monitor. If enabled the code will
2790 wait for an affirmative ACK between transmitting packets. */
2791 #define DOETXACK (1)
2793 /* The PMON fast-download uses an encoded packet format constructed of
2794 3byte data packets (encoded as 4 printable ASCII characters), and
2795 escape sequences (preceded by a '/'):
2798 'C' compare checksum (12bit value, not included in checksum calculation)
2799 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2800 'Z' zero fill multiple of 3bytes
2801 'B' byte (12bit encoded value, of 8bit data)
2802 'A' address (36bit encoded value)
2803 'E' define entry as original address, and exit load
2805 The packets are processed in 4 character chunks, so the escape
2806 sequences that do not have any data (or variable length data)
2807 should be padded to a 4 character boundary. The decoder will give
2808 an error if the complete message block size is not a multiple of
2809 4bytes (size of record).
2811 The encoding of numbers is done in 6bit fields. The 6bit value is
2812 used to index into this string to get the specific character
2813 encoding for the value: */
2814 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2816 /* Convert the number of bits required into an encoded number, 6bits
2817 at a time (range 0..63). Keep a checksum if required (passed
2818 pointer non-NULL). The function returns the number of encoded
2819 characters written into the buffer. */
2821 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2823 int count
= (n
/ 6);
2827 fprintf_unfiltered (gdb_stderr
,
2828 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
2833 fprintf_unfiltered (gdb_stderr
,
2834 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
2838 /* Deal with the checksum: */
2844 *chksum
+= ((v
>> 24) & 0xFFF);
2846 *chksum
+= ((v
>> 12) & 0xFFF);
2848 *chksum
+= ((v
>> 0) & 0xFFF);
2855 *p
++ = encoding
[(v
>> n
) & 0x3F];
2862 /* Shorthand function (that could be in-lined) to output the zero-fill
2863 escape sequence into the data stream. */
2865 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
2869 sprintf (*buff
, "/Z");
2870 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
2871 *buff
+= (count
+ 2);
2873 return (recsize
+ count
+ 2);
2877 pmon_checkset (int recsize
, char **buff
, int *value
)
2881 /* Add the checksum (without updating the value): */
2882 sprintf (*buff
, "/C");
2883 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
2884 *buff
+= (count
+ 2);
2885 sprintf (*buff
, "\n");
2886 *buff
+= 2; /* include zero terminator */
2887 /* Forcing a checksum validation clears the sum: */
2889 return (recsize
+ count
+ 3);
2892 /* Amount of padding we leave after at the end of the output buffer,
2893 for the checksum and line termination characters: */
2894 #define CHECKSIZE (4 + 4 + 4 + 2)
2895 /* zero-fill, checksum, transfer end and line termination space. */
2897 /* The amount of binary data loaded from the object file in a single
2899 #define BINCHUNK (1024)
2901 /* Maximum line of data accepted by the monitor: */
2902 #define MAXRECSIZE (550)
2903 /* NOTE: This constant depends on the monitor being used. This value
2904 is for PMON 5.x on the Cogent Vr4300 board. */
2907 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
2908 int inamount
, int *recsize
, unsigned int *csum
,
2909 unsigned int *zerofill
)
2914 /* This is a simple check to ensure that our data will fit within
2915 the maximum allowable record size. Each record output is 4bytes
2916 in length. We must allow space for a pending zero fill command,
2917 the record, and a checksum record. */
2918 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
2920 /* Process the binary data: */
2921 if ((inamount
- *inptr
) < 3)
2924 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
2926 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
2928 *recsize
+= (2 + count
);
2933 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
2934 /* Simple check for zero data. TODO: A better check would be
2935 to check the last, and then the middle byte for being zero
2936 (if the first byte is not). We could then check for
2937 following runs of zeros, and if above a certain size it is
2938 worth the 4 or 8 character hit of the byte insertions used
2939 to pad to the start of the zeroes. NOTE: This also depends
2940 on the alignment at the end of the zero run. */
2941 if (value
== 0x00000000)
2944 if (*zerofill
== 0xFFF) /* 12bit counter */
2945 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
2950 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
2951 count
= pmon_makeb64 (value
, p
, 24, csum
);
2964 pmon_check_ack (char *mesg
)
2966 #if defined(DOETXACK)
2971 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
2973 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
2975 fprintf_unfiltered (gdb_stderr
,
2976 "Failed to receive valid ACK for %s\n", mesg
);
2977 return (-1); /* terminate the download */
2980 #endif /* DOETXACK */
2984 /* pmon_download - Send a sequence of characters to the PMON download port,
2985 which is either a serial port or a UDP socket. */
2988 pmon_start_download (void)
2992 /* Create the temporary download file. */
2993 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
2994 perror_with_name (tftp_localname
);
2998 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
2999 mips_expect ("Downloading from ");
3000 mips_expect (udp_in_use
? "udp" : "tty0");
3001 mips_expect (", ^C to abort\r\n");
3006 mips_expect_download (char *string
)
3008 if (!mips_expect (string
))
3010 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3012 remove (tftp_localname
); /* Remove temporary file */
3020 pmon_check_entry_address (char *entry_address
, int final
)
3022 char hexnumber
[9]; /* includes '\0' space */
3023 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3024 sprintf (hexnumber
, "%x", final
);
3025 mips_expect (hexnumber
);
3026 mips_expect ("\r\n");
3030 pmon_check_total (int bintotal
)
3032 char hexnumber
[9]; /* includes '\0' space */
3033 mips_expect ("\r\ntotal = 0x");
3034 sprintf (hexnumber
, "%x", bintotal
);
3035 mips_expect (hexnumber
);
3036 return mips_expect_download (" bytes\r\n");
3040 pmon_end_download (int final
, int bintotal
)
3042 char hexnumber
[9]; /* includes '\0' space */
3046 static char *load_cmd_prefix
= "load -b -s ";
3050 /* Close off the temporary file containing the load data. */
3054 /* Make the temporary file readable by the world. */
3055 if (stat (tftp_localname
, &stbuf
) == 0)
3056 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3058 /* Must reinitialize the board to prevent PMON from crashing. */
3059 mips_send_command ("initEther\r", -1);
3061 /* Send the load command. */
3062 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3063 strcpy (cmd
, load_cmd_prefix
);
3064 strcat (cmd
, tftp_name
);
3066 mips_send_command (cmd
, 0);
3068 if (!mips_expect_download ("Downloading from "))
3070 if (!mips_expect_download (tftp_name
))
3072 if (!mips_expect_download (", ^C to abort\r\n"))
3076 /* Wait for the stuff that PMON prints after the load has completed.
3077 The timeout value for use in the tftp case (15 seconds) was picked
3078 arbitrarily but might be too small for really large downloads. FIXME. */
3079 switch (mips_monitor
)
3082 pmon_check_ack ("termination");
3083 pmon_check_entry_address ("Entry address is ", final
);
3084 if (!pmon_check_total (bintotal
))
3088 pmon_check_entry_address ("Entry Address = ", final
);
3089 pmon_check_ack ("termination");
3090 if (!pmon_check_total (bintotal
))
3096 remove (tftp_localname
); /* Remove temporary file */
3100 pmon_download (char *buffer
, int length
)
3103 fwrite (buffer
, 1, length
, tftp_file
);
3105 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3109 pmon_load_fast (char *file
)
3113 unsigned char *binbuf
;
3116 unsigned int csum
= 0;
3117 int hashmark
= !tftp_in_use
;
3122 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3123 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3125 abfd
= bfd_openr (file
, 0);
3128 printf_filtered ("Unable to open file %s\n", file
);
3132 if (bfd_check_format (abfd
, bfd_object
) == 0)
3134 printf_filtered ("File is not an object file\n");
3138 /* Setup the required download state: */
3139 mips_send_command ("set dlproto etxack\r", -1);
3140 mips_send_command ("set dlecho off\r", -1);
3141 /* NOTE: We get a "cannot set variable" message if the variable is
3142 already defined to have the argument we give. The code doesn't
3143 care, since it just scans to the next prompt anyway. */
3144 /* Start the download: */
3145 pmon_start_download ();
3147 /* Zero the checksum */
3148 sprintf (buffer
, "/Kxx\n");
3149 reclen
= strlen (buffer
);
3150 pmon_download (buffer
, reclen
);
3151 finished
= pmon_check_ack ("/Kxx");
3153 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3154 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3156 bintotal
+= bfd_get_section_size (s
);
3157 final
= (s
->vma
+ bfd_get_section_size (s
));
3159 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3160 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3161 gdb_flush (gdb_stdout
);
3163 /* Output the starting address */
3164 sprintf (buffer
, "/A");
3165 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3166 buffer
[2 + reclen
] = '\n';
3167 buffer
[3 + reclen
] = '\0';
3168 reclen
+= 3; /* for the initial escape code and carriage return */
3169 pmon_download (buffer
, reclen
);
3170 finished
= pmon_check_ack ("/A");
3174 unsigned int binamount
;
3175 unsigned int zerofill
= 0;
3182 i
< bfd_get_section_size (s
) && !finished
;
3187 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3189 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3191 /* This keeps a rolling checksum, until we decide to output
3193 for (; ((binamount
- binptr
) > 0);)
3195 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3196 &reclen
, &csum
, &zerofill
);
3197 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3199 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3200 pmon_download (buffer
, reclen
);
3201 finished
= pmon_check_ack ("data record");
3204 zerofill
= 0; /* do not transmit pending zerofills */
3208 if (deprecated_ui_load_progress_hook
)
3209 deprecated_ui_load_progress_hook (s
->name
, i
);
3213 putchar_unfiltered ('#');
3214 gdb_flush (gdb_stdout
);
3218 reclen
= 0; /* buffer processed */
3223 /* Ensure no out-standing zerofill requests: */
3225 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3227 /* and then flush the line: */
3230 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3231 /* Currently pmon_checkset outputs the line terminator by
3232 default, so we write out the buffer so far: */
3233 pmon_download (buffer
, reclen
);
3234 finished
= pmon_check_ack ("record remnant");
3238 putchar_unfiltered ('\n');
3241 /* Terminate the transfer. We know that we have an empty output
3242 buffer at this point. */
3243 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3244 reclen
= strlen (buffer
);
3245 pmon_download (buffer
, reclen
);
3248 { /* Ignore the termination message: */
3249 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3252 { /* Deal with termination message: */
3253 pmon_end_download (final
, bintotal
);
3259 /* mips_load -- download a file. */
3262 mips_load (char *file
, int from_tty
)
3264 /* Get the board out of remote debugging mode. */
3265 if (mips_exit_debug ())
3266 error ("mips_load: Couldn't get into monitor mode.");
3268 if (mips_monitor
!= MON_IDT
)
3269 pmon_load_fast (file
);
3271 mips_load_srec (file
);
3275 /* Finally, make the PC point at the start address */
3276 if (mips_monitor
!= MON_IDT
)
3278 /* Work around problem where PMON monitor updates the PC after a load
3279 to a different value than GDB thinks it has. The following ensures
3280 that the write_pc() WILL update the PC value: */
3281 struct regcache
*regcache
= get_current_regcache ();
3282 regcache_set_valid_p (regcache
,
3283 gdbarch_pc_regnum (get_regcache_arch (regcache
)),
3287 write_pc (bfd_get_start_address (exec_bfd
));
3289 inferior_ptid
= null_ptid
; /* No process now */
3291 /* This is necessary because many things were based on the PC at the time that
3292 we attached to the monitor, which is no longer valid now that we have loaded
3293 new code (and just changed the PC). Another way to do this might be to call
3294 normal_stop, except that the stack may not be valid, and things would get
3295 horribly confused... */
3297 clear_symtab_users ();
3301 /* Pass the command argument as a packet to PMON verbatim. */
3304 pmon_command (char *args
, int from_tty
)
3306 char buf
[DATA_MAXLEN
+ 1];
3309 sprintf (buf
, "0x0 %s", args
);
3310 mips_send_packet (buf
, 1);
3311 printf_filtered ("Send packet: %s\n", buf
);
3313 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3315 printf_filtered ("Received packet: %s\n", buf
);
3318 extern initialize_file_ftype _initialize_remote_mips
; /* -Wmissing-prototypes */
3321 _initialize_remote_mips (void)
3323 /* Initialize the fields in mips_ops that are common to all four targets. */
3324 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3325 mips_ops
.to_close
= mips_close
;
3326 mips_ops
.to_detach
= mips_detach
;
3327 mips_ops
.to_resume
= mips_resume
;
3328 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3329 mips_ops
.to_store_registers
= mips_store_registers
;
3330 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3331 mips_ops
.deprecated_xfer_memory
= mips_xfer_memory
;
3332 mips_ops
.to_files_info
= mips_files_info
;
3333 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3334 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3335 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3336 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3337 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3338 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3339 mips_ops
.to_kill
= mips_kill
;
3340 mips_ops
.to_load
= mips_load
;
3341 mips_ops
.to_create_inferior
= mips_create_inferior
;
3342 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3343 mips_ops
.to_log_command
= serial_log_command
;
3344 mips_ops
.to_stratum
= process_stratum
;
3345 mips_ops
.to_has_all_memory
= 1;
3346 mips_ops
.to_has_memory
= 1;
3347 mips_ops
.to_has_stack
= 1;
3348 mips_ops
.to_has_registers
= 1;
3349 mips_ops
.to_has_execution
= 1;
3350 mips_ops
.to_magic
= OPS_MAGIC
;
3352 /* Copy the common fields to all four target vectors. */
3353 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3355 /* Initialize target-specific fields in the target vectors. */
3356 mips_ops
.to_shortname
= "mips";
3357 mips_ops
.to_doc
= "\
3358 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3359 The argument is the device it is connected to or, if it contains a colon,\n\
3360 HOST:PORT to access a board over a network";
3361 mips_ops
.to_open
= mips_open
;
3362 mips_ops
.to_wait
= mips_wait
;
3364 pmon_ops
.to_shortname
= "pmon";
3365 pmon_ops
.to_doc
= "\
3366 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3367 line. The argument is the device it is connected to or, if it contains a\n\
3368 colon, HOST:PORT to access a board over a network";
3369 pmon_ops
.to_open
= pmon_open
;
3370 pmon_ops
.to_wait
= mips_wait
;
3372 ddb_ops
.to_shortname
= "ddb";
3374 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3375 line. The first argument is the device it is connected to or, if it contains\n\
3376 a colon, HOST:PORT to access a board over a network. The optional second\n\
3377 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3378 TFTP downloads to the board. The optional third parameter is the local name\n\
3379 of the TFTP temporary file, if it differs from the filename seen by the board.";
3380 ddb_ops
.to_open
= ddb_open
;
3381 ddb_ops
.to_wait
= mips_wait
;
3383 lsi_ops
.to_shortname
= "lsi";
3384 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3385 lsi_ops
.to_open
= lsi_open
;
3386 lsi_ops
.to_wait
= mips_wait
;
3388 /* Add the targets. */
3389 add_target (&mips_ops
);
3390 add_target (&pmon_ops
);
3391 add_target (&ddb_ops
);
3392 add_target (&lsi_ops
);
3394 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3395 Set timeout in seconds for remote MIPS serial I/O."), _("\
3396 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3398 NULL
, /* FIXME: i18n: */
3399 &setlist
, &showlist
);
3401 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3402 &mips_retransmit_wait
, _("\
3403 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3404 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3405 This is the number of seconds to wait for an acknowledgement to a packet\n\
3406 before resending the packet."),
3408 NULL
, /* FIXME: i18n: */
3409 &setlist
, &showlist
);
3411 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3412 &mips_syn_garbage
, _("\
3413 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3414 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3415 This is the maximum number of characters GDB will ignore when trying to\n\
3416 synchronize with the remote system. A value of -1 means that there is no\n\
3417 limit. (Note that these characters are printed out even though they are\n\
3420 NULL
, /* FIXME: i18n: */
3421 &setlist
, &showlist
);
3423 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3424 &mips_monitor_prompt
, _("\
3425 Set the prompt that GDB expects from the monitor."), _("\
3426 Show the prompt that GDB expects from the monitor."), NULL
,
3428 NULL
, /* FIXME: i18n: */
3429 &setlist
, &showlist
);
3431 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3432 &monitor_warnings
, _("\
3433 Set printing of monitor warnings."), _("\
3434 Show printing of monitor warnings."), _("\
3435 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3437 NULL
, /* FIXME: i18n: */
3438 &setlist
, &showlist
);
3440 add_com ("pmon", class_obscure
, pmon_command
,
3441 _("Send a packet to PMON (must be in debug mode)."));
3443 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3444 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3445 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3446 Use \"on\" to enable the masking and \"off\" to disable it."),
3448 NULL
, /* FIXME: i18n: */
3449 &setlist
, &showlist
);