1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
32 #include "remote-utils.h"
33 #include "gdb_string.h"
36 #include <sys/types.h>
38 #ifdef ANSI_PROTOTYPES
44 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
46 #define S_IROTH S_IREAD
49 extern void mips_set_processor_type_command
PARAMS ((char *, int));
52 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
53 types passed by breakpoint.c to target_insert_watchpoint.
54 Value 3 is our own invention, and is used for ordinary instruction
55 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
65 /* Prototypes for local functions. */
67 static int mips_readchar
PARAMS ((int timeout
));
69 static int mips_receive_header
PARAMS ((unsigned char *hdr
, int *pgarbage
,
70 int ch
, int timeout
));
72 static int mips_receive_trailer
PARAMS ((unsigned char *trlr
, int *pgarbage
,
73 int *pch
, int timeout
));
75 static int mips_cksum
PARAMS ((const unsigned char *hdr
,
76 const unsigned char *data
,
79 static void mips_send_packet
PARAMS ((const char *s
, int get_ack
));
81 static void mips_send_command
PARAMS ((const char *cmd
, int prompt
));
83 static int mips_receive_packet
PARAMS ((char *buff
, int throw_error
,
86 static CORE_ADDR mips_request
PARAMS ((int cmd
, CORE_ADDR addr
,
87 CORE_ADDR data
, int *perr
, int timeout
,
90 static void mips_initialize
PARAMS ((void));
92 static void mips_open
PARAMS ((char *name
, int from_tty
));
94 static void pmon_open
PARAMS ((char *name
, int from_tty
));
96 static void ddb_open
PARAMS ((char *name
, int from_tty
));
98 static void lsi_open
PARAMS ((char *name
, int from_tty
));
100 static void mips_close
PARAMS ((int quitting
));
102 static void mips_detach
PARAMS ((char *args
, int from_tty
));
104 static void mips_resume
PARAMS ((int pid
, int step
,
105 enum target_signal siggnal
));
107 static int mips_wait
PARAMS ((int pid
, struct target_waitstatus
* status
));
109 static int mips_map_regno
PARAMS ((int regno
));
111 static void mips_fetch_registers
PARAMS ((int regno
));
113 static void mips_prepare_to_store
PARAMS ((void));
115 static void mips_store_registers
PARAMS ((int regno
));
117 static unsigned int mips_fetch_word
PARAMS ((CORE_ADDR addr
));
119 static int mips_store_word
PARAMS ((CORE_ADDR addr
, unsigned int value
,
120 char *old_contents
));
122 static int mips_xfer_memory
PARAMS ((CORE_ADDR memaddr
, char *myaddr
, int len
,
123 int write
, struct target_ops
* ignore
));
125 static void mips_files_info
PARAMS ((struct target_ops
* ignore
));
127 static void mips_create_inferior
PARAMS ((char *execfile
, char *args
,
130 static void mips_mourn_inferior
PARAMS ((void));
132 static int pmon_makeb64
PARAMS ((unsigned long v
, char *p
, int n
, int *chksum
));
134 static int pmon_zeroset
PARAMS ((int recsize
, char **buff
, int *amount
,
135 unsigned int *chksum
));
137 static int pmon_checkset
PARAMS ((int recsize
, char **buff
, int *value
));
139 static void pmon_make_fastrec
PARAMS ((char **outbuf
, unsigned char *inbuf
,
140 int *inptr
, int inamount
, int *recsize
,
141 unsigned int *csum
, unsigned int *zerofill
));
143 static int pmon_check_ack
PARAMS ((char *mesg
));
145 static void pmon_start_download
PARAMS ((void));
147 static void pmon_end_download
PARAMS ((int final
, int bintotal
));
149 static void pmon_download
PARAMS ((char *buffer
, int length
));
151 static void pmon_load_fast
PARAMS ((char *file
));
153 static void mips_load
PARAMS ((char *file
, int from_tty
));
155 static int mips_make_srec
PARAMS ((char *buffer
, int type
, CORE_ADDR memaddr
,
156 unsigned char *myaddr
, int len
));
158 static int set_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
159 enum break_type type
));
161 static int clear_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
162 enum break_type type
));
164 static int common_breakpoint
PARAMS ((int set
, CORE_ADDR addr
, int len
,
165 enum break_type type
));
167 /* Forward declarations. */
168 extern struct target_ops mips_ops
;
169 extern struct target_ops pmon_ops
;
170 extern struct target_ops ddb_ops
;
172 /* The MIPS remote debugging interface is built on top of a simple
173 packet protocol. Each packet is organized as follows:
175 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
176 may not appear anywhere else in the packet. Any time a SYN is
177 seen, a new packet should be assumed to have begun.
180 This byte contains the upper five bits of the logical length
181 of the data section, plus a single bit indicating whether this
182 is a data packet or an acknowledgement. The documentation
183 indicates that this bit is 1 for a data packet, but the actual
184 board uses 1 for an acknowledgement. The value of the byte is
185 0x40 + (ack ? 0x20 : 0) + (len >> 6)
186 (we always have 0 <= len < 1024). Acknowledgement packets do
187 not carry data, and must have a data length of 0.
189 LEN1 This byte contains the lower six bits of the logical length of
190 the data section. The value is
193 SEQ This byte contains the six bit sequence number of the packet.
196 An acknowlegment packet contains the sequence number of the
197 packet being acknowledged plus 1 modulo 64. Data packets are
198 transmitted in sequence. There may only be one outstanding
199 unacknowledged data packet at a time. The sequence numbers
200 are independent in each direction. If an acknowledgement for
201 the previous packet is received (i.e., an acknowledgement with
202 the sequence number of the packet just sent) the packet just
203 sent should be retransmitted. If no acknowledgement is
204 received within a timeout period, the packet should be
205 retransmitted. This has an unfortunate failure condition on a
206 high-latency line, as a delayed acknowledgement may lead to an
207 endless series of duplicate packets.
209 DATA The actual data bytes follow. The following characters are
210 escaped inline with DLE (ASCII 020, or ^P):
216 The additional DLE characters are not counted in the logical
217 length stored in the TYPE_LEN and LEN1 bytes.
222 These bytes contain an 18 bit checksum of the complete
223 contents of the packet excluding the SEQ byte and the
224 CSUM[123] bytes. The checksum is simply the twos complement
225 addition of all the bytes treated as unsigned characters. The
226 values of the checksum bytes are:
227 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
228 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
229 CSUM3: 0x40 + (cksum & 0x3f)
231 It happens that the MIPS remote debugging protocol always
232 communicates with ASCII strings. Because of this, this
233 implementation doesn't bother to handle the DLE quoting mechanism,
234 since it will never be required. */
238 /* The SYN character which starts each packet. */
241 /* The 0x40 used to offset each packet (this value ensures that all of
242 the header and trailer bytes, other than SYN, are printable ASCII
244 #define HDR_OFFSET 0x40
246 /* The indices of the bytes in the packet header. */
247 #define HDR_INDX_SYN 0
248 #define HDR_INDX_TYPE_LEN 1
249 #define HDR_INDX_LEN1 2
250 #define HDR_INDX_SEQ 3
253 /* The data/ack bit in the TYPE_LEN header byte. */
254 #define TYPE_LEN_DA_BIT 0x20
255 #define TYPE_LEN_DATA 0
256 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
258 /* How to compute the header bytes. */
259 #define HDR_SET_SYN(data, len, seq) (SYN)
260 #define HDR_SET_TYPE_LEN(data, len, seq) \
262 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
263 + (((len) >> 6) & 0x1f))
264 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
265 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
267 /* Check that a header byte is reasonable. */
268 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
270 /* Get data from the header. These macros evaluate their argument
272 #define HDR_IS_DATA(hdr) \
273 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
274 #define HDR_GET_LEN(hdr) \
275 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
276 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
278 /* The maximum data length. */
279 #define DATA_MAXLEN 1023
281 /* The trailer offset. */
282 #define TRLR_OFFSET HDR_OFFSET
284 /* The indices of the bytes in the packet trailer. */
285 #define TRLR_INDX_CSUM1 0
286 #define TRLR_INDX_CSUM2 1
287 #define TRLR_INDX_CSUM3 2
288 #define TRLR_LENGTH 3
290 /* How to compute the trailer bytes. */
291 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
292 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
293 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
295 /* Check that a trailer byte is reasonable. */
296 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
298 /* Get data from the trailer. This evaluates its argument multiple
300 #define TRLR_GET_CKSUM(trlr) \
301 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
302 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
303 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
305 /* The sequence number modulos. */
306 #define SEQ_MODULOS (64)
308 /* PMON commands to load from the serial port or UDP socket. */
309 #define LOAD_CMD "load -b -s tty0\r"
310 #define LOAD_CMD_UDP "load -b -s udp\r"
312 /* The target vectors for the four different remote MIPS targets.
313 These are initialized with code in _initialize_remote_mips instead
314 of static initializers, to make it easier to extend the target_ops
316 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
318 enum mips_monitor_type
320 /* IDT/SIM monitor being used: */
322 /* PMON monitor being used: */
323 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
324 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
325 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
326 /* Last and unused value, for sizing vectors, etc. */
329 static enum mips_monitor_type mips_monitor
= MON_LAST
;
331 /* The monitor prompt text. If the user sets the PMON prompt
332 to some new value, the GDB `set monitor-prompt' command must also
333 be used to inform GDB about the expected prompt. Otherwise, GDB
334 will not be able to connect to PMON in mips_initialize().
335 If the `set monitor-prompt' command is not used, the expected
336 default prompt will be set according the target:
343 static char *mips_monitor_prompt
;
345 /* Set to 1 if the target is open. */
346 static int mips_is_open
;
348 /* Currently active target description (if mips_is_open == 1) */
349 static struct target_ops
*current_ops
;
351 /* Set to 1 while the connection is being initialized. */
352 static int mips_initializing
;
354 /* Set to 1 while the connection is being brought down. */
355 static int mips_exiting
;
357 /* The next sequence number to send. */
358 static unsigned int mips_send_seq
;
360 /* The next sequence number we expect to receive. */
361 static unsigned int mips_receive_seq
;
363 /* The time to wait before retransmitting a packet, in seconds. */
364 static int mips_retransmit_wait
= 3;
366 /* The number of times to try retransmitting a packet before giving up. */
367 static int mips_send_retries
= 10;
369 /* The number of garbage characters to accept when looking for an
370 SYN for the next packet. */
371 static int mips_syn_garbage
= 1050;
373 /* The time to wait for a packet, in seconds. */
374 static int mips_receive_wait
= 5;
376 /* Set if we have sent a packet to the board but have not yet received
378 static int mips_need_reply
= 0;
380 /* Handle used to access serial I/O stream. */
381 static serial_t mips_desc
;
383 /* UDP handle used to download files to target. */
384 static serial_t udp_desc
;
385 static int udp_in_use
;
387 /* TFTP filename used to download files to DDB board, in the form
389 static char *tftp_name
; /* host:filename */
390 static char *tftp_localname
; /* filename portion of above */
391 static int tftp_in_use
;
392 static FILE *tftp_file
;
394 /* Counts the number of times the user tried to interrupt the target (usually
396 static int interrupt_count
;
398 /* If non-zero, means that the target is running. */
399 static int mips_wait_flag
= 0;
401 /* If non-zero, monitor supports breakpoint commands. */
402 static monitor_supports_breakpoints
= 0;
404 /* Data cache header. */
406 #if 0 /* not used (yet?) */
407 static DCACHE
*mips_dcache
;
410 /* Non-zero means that we've just hit a read or write watchpoint */
411 static int hit_watchpoint
;
413 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
414 The table is indexed by a breakpoint number, which is an integer
415 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
417 #define MAX_LSI_BREAKPOINTS 256
418 struct lsi_breakpoint_info
420 enum break_type type
; /* type of breakpoint */
421 CORE_ADDR addr
; /* address of breakpoint */
422 int len
; /* length of region being watched */
423 unsigned long value
; /* value to watch */
425 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
427 /* Error/warning codes returned by LSI PMON for breakpoint commands.
428 Warning values may be ORed together; error values may not. */
429 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
430 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
431 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
432 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
434 #define E_ERR 0x200 /* This bit is set if the error code is an error */
435 #define E_BPT 0x200 /* error: No such breakpoint number */
436 #define E_RGE 0x201 /* error: Range is not supported */
437 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
438 #define E_OUT 0x203 /* error: Out of hardware resources */
439 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
443 int code
; /* error code */
444 char *string
; /* string associated with this code */
447 struct lsi_error lsi_warning_table
[] =
449 {W_MSK
, "Range feature is supported via mask"},
450 {W_VAL
, "Value check is not supported in hardware"},
451 {W_QAL
, "Requested qualifiers are not supported in hardware"},
455 struct lsi_error lsi_error_table
[] =
457 {E_BPT
, "No such breakpoint number"},
458 {E_RGE
, "Range is not supported"},
459 {E_QAL
, "The requested qualifiers can not be used"},
460 {E_OUT
, "Out of hardware resources"},
461 {E_NON
, "Hardware breakpoint not supported"},
465 /* Set to 1 with the 'set monitor-warnings' command to enable printing
466 of warnings returned by PMON when hardware breakpoints are used. */
467 static int monitor_warnings
;
474 SERIAL_CLOSE (mips_desc
);
478 SERIAL_CLOSE (udp_desc
);
484 /* Handle low-level error that we can't recover from. Note that just
485 error()ing out from target_wait or some such low-level place will cause
486 all hell to break loose--the rest of GDB will tend to get left in an
487 inconsistent state. */
490 #ifdef ANSI_PROTOTYPES
491 mips_error (char *string
,...)
493 mips_error (va_alist
)
499 #ifdef ANSI_PROTOTYPES
500 va_start (args
, string
);
504 string
= va_arg (args
, char *);
507 target_terminal_ours ();
508 wrap_here (""); /* Force out any buffered output */
509 gdb_flush (gdb_stdout
);
511 fprintf_filtered (gdb_stderr
, error_pre_print
);
512 vfprintf_filtered (gdb_stderr
, string
, args
);
513 fprintf_filtered (gdb_stderr
, "\n");
515 gdb_flush (gdb_stderr
);
517 /* Clean up in such a way that mips_close won't try to talk to the
518 board (it almost surely won't work since we weren't able to talk to
522 printf_unfiltered ("Ending remote MIPS debugging.\n");
523 target_mourn_inferior ();
525 return_to_top_level (RETURN_ERROR
);
528 /* putc_readable - print a character, displaying non-printable chars in
529 ^x notation or in hex. */
532 fputc_readable (ch
, file
)
534 struct gdb_file
*file
;
537 fputc_unfiltered ('\n', file
);
539 fprintf_unfiltered (file
, "\\r");
540 else if (ch
< 0x20) /* ASCII control character */
541 fprintf_unfiltered (file
, "^%c", ch
+ '@');
542 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
543 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
545 fputc_unfiltered (ch
, file
);
549 /* puts_readable - print a string, displaying non-printable chars in
550 ^x notation or in hex. */
553 fputs_readable (string
, file
)
555 struct gdb_file
*file
;
559 while ((c
= *string
++) != '\0')
560 fputc_readable (c
, file
);
564 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
565 timed out. TIMEOUT specifies timeout value in seconds.
569 mips_expect_timeout (string
, timeout
)
577 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
578 fputs_readable (string
, gdb_stdlog
);
579 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
587 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
588 were waiting for the mips_monitor_prompt... */
590 c
= SERIAL_READCHAR (mips_desc
, timeout
);
592 if (c
== SERIAL_TIMEOUT
)
595 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
600 fputc_readable (c
, gdb_stdlog
);
608 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
621 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
622 timed out. The timeout value is hard-coded to 2 seconds. Use
623 mips_expect_timeout if a different timeout value is needed.
630 return mips_expect_timeout (string
, 2);
633 /* Read the required number of characters into the given buffer (which
634 is assumed to be large enough). The only failure is a timeout. */
636 mips_getstring (string
, n
)
646 c
= SERIAL_READCHAR (mips_desc
, 2);
648 if (c
== SERIAL_TIMEOUT
)
650 fprintf_unfiltered (gdb_stderr
,
651 "Failed to read %d characters from target (TIMEOUT)\n", n
);
662 /* Read a character from the remote, aborting on error. Returns
663 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
664 returns). FIXME: If we see the string mips_monitor_prompt from
665 the board, then we are debugging on the main console port, and we
666 have somehow dropped out of remote debugging mode. In this case,
667 we automatically go back in to remote debugging mode. This is a
668 hack, put in because I can't find any way for a program running on
669 the remote board to terminate without also ending remote debugging
670 mode. I assume users won't have any trouble with this; for one
671 thing, the IDT documentation generally assumes that the remote
672 debugging port is not the console port. This is, however, very
673 convenient for DejaGnu when you only have one connected serial
677 mips_readchar (timeout
)
681 static int state
= 0;
682 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
688 if (i
== -1 && watchdog
> 0)
692 if (state
== mips_monitor_prompt_len
)
694 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
696 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
698 target_mourn_inferior ();
699 error ("Watchdog has expired. Target detached.\n");
702 if (ch
== SERIAL_EOF
)
703 mips_error ("End of file from remote");
704 if (ch
== SERIAL_ERROR
)
705 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
706 if (remote_debug
> 1)
708 /* Don't use _filtered; we can't deal with a QUIT out of
709 target_wait, and I think this might be called from there. */
710 if (ch
!= SERIAL_TIMEOUT
)
711 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
713 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
716 /* If we have seen mips_monitor_prompt and we either time out, or
717 we see a @ (which was echoed from a packet we sent), reset the
718 board as described above. The first character in a packet after
719 the SYN (which is not echoed) is always an @ unless the packet is
720 more than 64 characters long, which ours never are. */
721 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
722 && state
== mips_monitor_prompt_len
723 && !mips_initializing
726 if (remote_debug
> 0)
727 /* Don't use _filtered; we can't deal with a QUIT out of
728 target_wait, and I think this might be called from there. */
729 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
736 /* At this point, about the only thing we can do is abort the command
737 in progress and get back to command level as quickly as possible. */
739 error ("Remote board reset, debug protocol re-initialized.");
742 if (ch
== mips_monitor_prompt
[state
])
750 /* Get a packet header, putting the data in the supplied buffer.
751 PGARBAGE is a pointer to the number of garbage characters received
752 so far. CH is the last character received. Returns 0 for success,
753 or -1 for timeout. */
756 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
766 /* Wait for a SYN. mips_syn_garbage is intended to prevent
767 sitting here indefinitely if the board sends us one garbage
768 character per second. ch may already have a value from the
769 last time through the loop. */
772 ch
= mips_readchar (timeout
);
773 if (ch
== SERIAL_TIMEOUT
)
777 /* Printing the character here lets the user of gdb see
778 what the program is outputting, if the debugging is
779 being done on the console port. Don't use _filtered;
780 we can't deal with a QUIT out of target_wait. */
781 if (!mips_initializing
|| remote_debug
> 0)
783 fputc_readable (ch
, gdb_stdlog
);
784 gdb_flush (gdb_stdlog
);
788 if (mips_syn_garbage
> 0
789 && *pgarbage
> mips_syn_garbage
)
790 mips_error ("Debug protocol failure: more than %d characters before a sync.",
795 /* Get the packet header following the SYN. */
796 for (i
= 1; i
< HDR_LENGTH
; i
++)
798 ch
= mips_readchar (timeout
);
799 if (ch
== SERIAL_TIMEOUT
)
801 /* Make sure this is a header byte. */
802 if (ch
== SYN
|| !HDR_CHECK (ch
))
808 /* If we got the complete header, we can return. Otherwise we
809 loop around and keep looking for SYN. */
815 /* Get a packet header, putting the data in the supplied buffer.
816 PGARBAGE is a pointer to the number of garbage characters received
817 so far. The last character read is returned in *PCH. Returns 0
818 for success, -1 for timeout, -2 for error. */
821 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
830 for (i
= 0; i
< TRLR_LENGTH
; i
++)
832 ch
= mips_readchar (timeout
);
834 if (ch
== SERIAL_TIMEOUT
)
836 if (!TRLR_CHECK (ch
))
843 /* Get the checksum of a packet. HDR points to the packet header.
844 DATA points to the packet data. LEN is the length of DATA. */
847 mips_cksum (hdr
, data
, len
)
848 const unsigned char *hdr
;
849 const unsigned char *data
;
852 register const unsigned char *p
;
858 /* The initial SYN is not included in the checksum. */
872 /* Send a packet containing the given ASCII string. */
875 mips_send_packet (s
, get_ack
)
879 /* unsigned */ int len
;
880 unsigned char *packet
;
885 if (len
> DATA_MAXLEN
)
886 mips_error ("MIPS protocol data packet too long: %s", s
);
888 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
890 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
891 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
892 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
893 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
895 memcpy (packet
+ HDR_LENGTH
, s
, len
);
897 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
898 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
899 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
900 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
902 /* Increment the sequence number. This will set mips_send_seq to
903 the sequence number we expect in the acknowledgement. */
904 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
906 /* We can only have one outstanding data packet, so we just wait for
907 the acknowledgement here. Keep retransmitting the packet until
908 we get one, or until we've tried too many times. */
909 for (try = 0; try < mips_send_retries
; try++)
914 if (remote_debug
> 0)
916 /* Don't use _filtered; we can't deal with a QUIT out of
917 target_wait, and I think this might be called from there. */
918 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
919 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
922 if (SERIAL_WRITE (mips_desc
, packet
,
923 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
924 mips_error ("write to target failed: %s", safe_strerror (errno
));
933 unsigned char hdr
[HDR_LENGTH
+ 1];
934 unsigned char trlr
[TRLR_LENGTH
+ 1];
938 /* Get the packet header. If we time out, resend the data
940 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
946 /* If we get a data packet, assume it is a duplicate and
947 ignore it. FIXME: If the acknowledgement is lost, this
948 data packet may be the packet the remote sends after the
950 if (HDR_IS_DATA (hdr
))
954 /* Ignore any errors raised whilst attempting to ignore
957 len
= HDR_GET_LEN (hdr
);
959 for (i
= 0; i
< len
; i
++)
963 rch
= mips_readchar (2);
969 if (rch
== SERIAL_TIMEOUT
)
971 /* ignore the character */
975 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
977 /* We don't bother checking the checksum, or providing an
978 ACK to the packet. */
982 /* If the length is not 0, this is a garbled packet. */
983 if (HDR_GET_LEN (hdr
) != 0)
986 /* Get the packet trailer. */
987 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
988 mips_retransmit_wait
);
990 /* If we timed out, resend the data packet. */
994 /* If we got a bad character, reread the header. */
998 /* If the checksum does not match the trailer checksum, this
999 is a bad packet; ignore it. */
1000 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
1001 != TRLR_GET_CKSUM (trlr
))
1004 if (remote_debug
> 0)
1006 hdr
[HDR_LENGTH
] = '\0';
1007 trlr
[TRLR_LENGTH
] = '\0';
1008 /* Don't use _filtered; we can't deal with a QUIT out of
1009 target_wait, and I think this might be called from there. */
1010 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
1011 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
1014 /* If this ack is for the current packet, we're done. */
1015 seq
= HDR_GET_SEQ (hdr
);
1016 if (seq
== mips_send_seq
)
1019 /* If this ack is for the last packet, resend the current
1021 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1024 /* Otherwise this is a bad ack; ignore it. Increment the
1025 garbage count to ensure that we do not stay in this loop
1031 mips_error ("Remote did not acknowledge packet");
1034 /* Receive and acknowledge a packet, returning the data in BUFF (which
1035 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1036 implies that only the sender retransmits packets, so this code just
1037 waits silently for a packet. It returns the length of the received
1038 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1039 don't print an error message and return -1. */
1042 mips_receive_packet (buff
, throw_error
, timeout
)
1050 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1057 unsigned char hdr
[HDR_LENGTH
];
1058 unsigned char trlr
[TRLR_LENGTH
];
1062 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1065 mips_error ("Timed out waiting for remote packet");
1072 /* An acknowledgement is probably a duplicate; ignore it. */
1073 if (!HDR_IS_DATA (hdr
))
1075 len
= HDR_GET_LEN (hdr
);
1076 /* Check if the length is valid for an ACK, we may aswell
1077 try and read the remainder of the packet: */
1080 /* Ignore the error condition, since we are going to
1081 ignore the packet anyway. */
1082 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1084 /* Don't use _filtered; we can't deal with a QUIT out of
1085 target_wait, and I think this might be called from there. */
1086 if (remote_debug
> 0)
1087 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1091 len
= HDR_GET_LEN (hdr
);
1092 for (i
= 0; i
< len
; i
++)
1096 rch
= mips_readchar (timeout
);
1102 if (rch
== SERIAL_TIMEOUT
)
1105 mips_error ("Timed out waiting for remote packet");
1114 /* Don't use _filtered; we can't deal with a QUIT out of
1115 target_wait, and I think this might be called from there. */
1116 if (remote_debug
> 0)
1117 fprintf_unfiltered (gdb_stdlog
,
1118 "Got new SYN after %d chars (wanted %d)\n",
1123 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1127 mips_error ("Timed out waiting for packet");
1133 /* Don't use _filtered; we can't deal with a QUIT out of
1134 target_wait, and I think this might be called from there. */
1135 if (remote_debug
> 0)
1136 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1140 /* If this is the wrong sequence number, ignore it. */
1141 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1143 /* Don't use _filtered; we can't deal with a QUIT out of
1144 target_wait, and I think this might be called from there. */
1145 if (remote_debug
> 0)
1146 fprintf_unfiltered (gdb_stdlog
,
1147 "Ignoring sequence number %d (want %d)\n",
1148 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1152 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1155 if (remote_debug
> 0)
1156 /* Don't use _filtered; we can't deal with a QUIT out of
1157 target_wait, and I think this might be called from there. */
1158 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1159 mips_cksum (hdr
, buff
, len
),
1160 TRLR_GET_CKSUM (trlr
));
1162 /* The checksum failed. Send an acknowledgement for the
1163 previous packet to tell the remote to resend the packet. */
1164 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1165 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1166 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1167 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1169 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1171 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1172 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1173 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1175 if (remote_debug
> 0)
1177 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1178 /* Don't use _filtered; we can't deal with a QUIT out of
1179 target_wait, and I think this might be called from there. */
1180 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1184 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1187 mips_error ("write to target failed: %s", safe_strerror (errno
));
1193 if (remote_debug
> 0)
1196 /* Don't use _filtered; we can't deal with a QUIT out of
1197 target_wait, and I think this might be called from there. */
1198 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1201 /* We got the packet. Send an acknowledgement. */
1202 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1204 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1205 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1206 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1207 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1209 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1211 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1212 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1213 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1215 if (remote_debug
> 0)
1217 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1218 /* Don't use _filtered; we can't deal with a QUIT out of
1219 target_wait, and I think this might be called from there. */
1220 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1224 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1227 mips_error ("write to target failed: %s", safe_strerror (errno
));
1235 /* Optionally send a request to the remote system and optionally wait
1236 for the reply. This implements the remote debugging protocol,
1237 which is built on top of the packet protocol defined above. Each
1238 request has an ADDR argument and a DATA argument. The following
1239 requests are defined:
1241 \0 don't send a request; just wait for a reply
1242 i read word from instruction space at ADDR
1243 d read word from data space at ADDR
1244 I write DATA to instruction space at ADDR
1245 D write DATA to data space at ADDR
1246 r read register number ADDR
1247 R set register number ADDR to value DATA
1248 c continue execution (if ADDR != 1, set pc to ADDR)
1249 s single step (if ADDR != 1, set pc to ADDR)
1251 The read requests return the value requested. The write requests
1252 return the previous value in the changed location. The execution
1253 requests return a UNIX wait value (the approximate signal which
1254 caused execution to stop is in the upper eight bits).
1256 If PERR is not NULL, this function waits for a reply. If an error
1257 occurs, it sets *PERR to 1 and sets errno according to what the
1258 target board reports. */
1261 mips_request (cmd
, addr
, data
, perr
, timeout
, buff
)
1269 char myBuff
[DATA_MAXLEN
+ 1];
1274 unsigned long rresponse
;
1276 if (buff
== (char *) NULL
)
1281 if (mips_need_reply
)
1282 fatal ("mips_request: Trying to send command before reply");
1283 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1284 mips_send_packet (buff
, 1);
1285 mips_need_reply
= 1;
1288 if (perr
== (int *) NULL
)
1291 if (!mips_need_reply
)
1292 fatal ("mips_request: Trying to get reply before command");
1294 mips_need_reply
= 0;
1296 len
= mips_receive_packet (buff
, 1, timeout
);
1299 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1300 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1301 || (cmd
!= '\0' && rcmd
!= cmd
))
1302 mips_error ("Bad response from remote board");
1308 /* FIXME: This will returns MIPS errno numbers, which may or may
1309 not be the same as errno values used on other systems. If
1310 they stick to common errno values, they will be the same, but
1311 if they don't, they must be translated. */
1322 mips_initialize_cleanups (arg
)
1325 mips_initializing
= 0;
1329 mips_exit_cleanups (arg
)
1336 mips_send_command (cmd
, prompt
)
1340 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1344 mips_expect (mips_monitor_prompt
);
1347 /* Enter remote (dbx) debug mode: */
1351 /* Reset the sequence numbers, ready for the new debug sequence: */
1353 mips_receive_seq
= 0;
1355 if (mips_monitor
!= MON_IDT
)
1356 mips_send_command ("debug\r", 0);
1357 else /* assume IDT monitor by default */
1358 mips_send_command ("db tty0\r", 0);
1361 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1363 /* We don't need to absorb any spurious characters here, since the
1364 mips_receive_header will eat up a reasonable number of characters
1365 whilst looking for the SYN, however this avoids the "garbage"
1366 being displayed to the user. */
1367 if (mips_monitor
!= MON_IDT
)
1371 char buff
[DATA_MAXLEN
+ 1];
1372 if (mips_receive_packet (buff
, 1, 3) < 0)
1373 mips_error ("Failed to initialize (didn't receive packet).");
1377 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1382 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1386 if (mips_monitor
!= MON_IDT
)
1388 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1389 so we do not get a reply to this command: */
1390 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL
,
1391 mips_receive_wait
, NULL
);
1392 mips_need_reply
= 0;
1393 if (!mips_expect (" break!"))
1397 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err
,
1398 mips_receive_wait
, NULL
);
1400 if (!mips_expect (mips_monitor_prompt
))
1403 do_cleanups (old_cleanups
);
1408 /* Initialize a new connection to the MIPS board, and make sure we are
1409 really connected. */
1415 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1418 /* What is this code doing here? I don't see any way it can happen, and
1419 it might mean mips_initializing didn't get cleared properly.
1420 So I'll make it a warning. */
1422 if (mips_initializing
)
1424 warning ("internal error: mips_initialize called twice");
1429 mips_initializing
= 1;
1431 /* At this point, the packit protocol isn't responding. We'll try getting
1432 into the monitor, and restarting the protocol. */
1434 /* Force the system into the monitor. After this we *should* be at
1435 the mips_monitor_prompt. */
1436 if (mips_monitor
!= MON_IDT
)
1437 j
= 0; /* start by checking if we are already at the prompt */
1439 j
= 1; /* start by sending a break */
1444 case 0: /* First, try sending a CR */
1445 SERIAL_FLUSH_INPUT (mips_desc
);
1446 SERIAL_WRITE (mips_desc
, "\r", 1);
1448 case 1: /* First, try sending a break */
1449 SERIAL_SEND_BREAK (mips_desc
);
1451 case 2: /* Then, try a ^C */
1452 SERIAL_WRITE (mips_desc
, "\003", 1);
1454 case 3: /* Then, try escaping from download */
1456 if (mips_monitor
!= MON_IDT
)
1460 /* We shouldn't need to send multiple termination
1461 sequences, since the target performs line (or
1462 block) reads, and then processes those
1463 packets. In-case we were downloading a large packet
1464 we flush the output buffer before inserting a
1465 termination sequence. */
1466 SERIAL_FLUSH_OUTPUT (mips_desc
);
1467 sprintf (tbuff
, "\r/E/E\r");
1468 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1475 /* We are possibly in binary download mode, having
1476 aborted in the middle of an S-record. ^C won't
1477 work because of binary mode. The only reliable way
1478 out is to send enough termination packets (8 bytes)
1479 to fill up and then overflow the largest size
1480 S-record (255 bytes in this case). This amounts to
1484 mips_make_srec (srec
, '7', 0, NULL
, 0);
1486 for (i
= 1; i
<= 33; i
++)
1488 SERIAL_WRITE (mips_desc
, srec
, 8);
1490 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1491 break; /* Break immediatly if we get something from
1498 mips_error ("Failed to initialize.");
1501 if (mips_expect (mips_monitor_prompt
))
1505 if (mips_monitor
!= MON_IDT
)
1507 /* Sometimes PMON ignores the first few characters in the first
1508 command sent after a load. Sending a blank command gets
1510 mips_send_command ("\r", -1);
1512 /* Ensure the correct target state: */
1513 if (mips_monitor
!= MON_LSI
)
1514 mips_send_command ("set regsize 64\r", -1);
1515 mips_send_command ("set hostport tty0\r", -1);
1516 mips_send_command ("set brkcmd \"\"\r", -1);
1517 /* Delete all the current breakpoints: */
1518 mips_send_command ("db *\r", -1);
1519 /* NOTE: PMON does not have breakpoint support through the
1520 "debug" mode, only at the monitor command-line. */
1523 mips_enter_debug ();
1525 /* Clear all breakpoints: */
1526 if ((mips_monitor
== MON_IDT
1527 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1528 || mips_monitor
== MON_LSI
)
1529 monitor_supports_breakpoints
= 1;
1531 monitor_supports_breakpoints
= 0;
1533 do_cleanups (old_cleanups
);
1535 /* If this doesn't call error, we have connected; we don't care if
1536 the request itself succeeds or fails. */
1538 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err
,
1539 mips_receive_wait
, NULL
);
1540 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1541 select_frame (get_current_frame (), 0);
1544 /* Open a connection to the remote board. */
1546 common_open (ops
, name
, from_tty
, new_monitor
, new_monitor_prompt
)
1547 struct target_ops
*ops
;
1550 enum mips_monitor_type new_monitor
;
1551 char *new_monitor_prompt
;
1554 char *serial_port_name
;
1555 char *remote_name
= 0;
1556 char *local_name
= 0;
1561 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1562 device is attached to the target board (e.g., /dev/ttya).\n"
1563 "If you want to use TFTP to download to the board, specify the name of a\n"
1564 "temporary file to be used by GDB for downloads as the second argument.\n"
1565 "This filename must be in the form host:filename, where host is the name\n"
1566 "of the host running the TFTP server, and the file must be readable by the\n"
1567 "world. If the local name of the temporary file differs from the name as\n"
1568 "seen from the board via TFTP, specify that name as the third parameter.\n");
1570 /* Parse the serial port name, the optional TFTP name, and the
1571 optional local TFTP name. */
1572 if ((argv
= buildargv (name
)) == NULL
)
1574 make_cleanup_freeargv (argv
);
1576 serial_port_name
= strsave (argv
[0]);
1577 if (argv
[1]) /* remote TFTP name specified? */
1579 remote_name
= argv
[1];
1580 if (argv
[2]) /* local TFTP filename specified? */
1581 local_name
= argv
[2];
1584 target_preopen (from_tty
);
1587 unpush_target (current_ops
);
1589 /* Open and initialize the serial port. */
1590 mips_desc
= SERIAL_OPEN (serial_port_name
);
1591 if (mips_desc
== (serial_t
) NULL
)
1592 perror_with_name (serial_port_name
);
1594 if (baud_rate
!= -1)
1596 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1598 SERIAL_CLOSE (mips_desc
);
1599 perror_with_name (serial_port_name
);
1603 SERIAL_RAW (mips_desc
);
1605 /* Open and initialize the optional download port. If it is in the form
1606 hostname#portnumber, it's a UDP socket. If it is in the form
1607 hostname:filename, assume it's the TFTP filename that must be
1608 passed to the DDB board to tell it where to get the load file. */
1611 if (strchr (remote_name
, '#'))
1613 udp_desc
= SERIAL_OPEN (remote_name
);
1615 perror_with_name ("Unable to open UDP port");
1620 /* Save the remote and local names of the TFTP temp file. If
1621 the user didn't specify a local name, assume it's the same
1622 as the part of the remote name after the "host:". */
1626 free (tftp_localname
);
1627 if (local_name
== NULL
)
1628 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1629 local_name
++; /* skip over the colon */
1630 if (local_name
== NULL
)
1631 local_name
= remote_name
; /* local name same as remote name */
1632 tftp_name
= strsave (remote_name
);
1633 tftp_localname
= strsave (local_name
);
1641 /* Reset the expected monitor prompt if it's never been set before. */
1642 if (mips_monitor_prompt
== NULL
)
1643 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1644 mips_monitor
= new_monitor
;
1649 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1651 /* Switch to using remote target now. */
1654 /* FIXME: Should we call start_remote here? */
1656 /* Try to figure out the processor model if possible. */
1657 ptype
= mips_read_processor_type ();
1659 mips_set_processor_type_command (strsave (ptype
), 0);
1661 /* This is really the job of start_remote however, that makes an assumption
1662 that the target is about to print out a status message of some sort. That
1663 doesn't happen here (in fact, it may not be possible to get the monitor to
1664 send the appropriate packet). */
1666 flush_cached_frames ();
1667 registers_changed ();
1668 stop_pc
= read_pc ();
1669 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1670 select_frame (get_current_frame (), 0);
1671 print_stack_frame (selected_frame
, -1, 1);
1672 free (serial_port_name
);
1676 mips_open (name
, from_tty
)
1680 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, TARGET_MONITOR_PROMPT
);
1684 pmon_open (name
, from_tty
)
1688 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1692 ddb_open (name
, from_tty
)
1696 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1700 lsi_open (name
, from_tty
)
1706 /* Clear the LSI breakpoint table. */
1707 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1708 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1710 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1713 /* Close a connection to the remote board. */
1716 mips_close (quitting
)
1721 /* Get the board out of remote debugging mode. */
1722 (void) mips_exit_debug ();
1728 /* Detach from the remote board. */
1731 mips_detach (args
, from_tty
)
1736 error ("Argument given to \"detach\" when remotely debugging.");
1743 printf_unfiltered ("Ending remote MIPS debugging.\n");
1746 /* Tell the target board to resume. This does not wait for a reply
1747 from the board, except in the case of single-stepping on LSI boards,
1748 where PMON does return a reply. */
1751 mips_resume (pid
, step
, siggnal
)
1753 enum target_signal siggnal
;
1757 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1758 a single step, so we wait for that. */
1759 mips_request (step
? 's' : 'c',
1761 (unsigned int) siggnal
,
1762 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1763 mips_receive_wait
, NULL
);
1766 /* Return the signal corresponding to SIG, where SIG is the number which
1767 the MIPS protocol uses for the signal. */
1769 mips_signal_from_protocol (sig
)
1772 /* We allow a few more signals than the IDT board actually returns, on
1773 the theory that there is at least *some* hope that perhaps the numbering
1774 for these signals is widely agreed upon. */
1777 return TARGET_SIGNAL_UNKNOWN
;
1779 /* Don't want to use target_signal_from_host because we are converting
1780 from MIPS signal numbers, not host ones. Our internal numbers
1781 match the MIPS numbers for the signals the board can return, which
1782 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1783 return (enum target_signal
) sig
;
1786 /* Wait until the remote stops, and return a wait status. */
1789 mips_wait (pid
, status
)
1791 struct target_waitstatus
*status
;
1795 char buff
[DATA_MAXLEN
];
1801 interrupt_count
= 0;
1804 /* If we have not sent a single step or continue command, then the
1805 board is waiting for us to do something. Return a status
1806 indicating that it is stopped. */
1807 if (!mips_need_reply
)
1809 status
->kind
= TARGET_WAITKIND_STOPPED
;
1810 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1814 /* No timeout; we sit here as long as the program continues to execute. */
1816 rstatus
= mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err
, -1,
1820 mips_error ("Remote failure: %s", safe_strerror (errno
));
1822 /* On returning from a continue, the PMON monitor seems to start
1823 echoing back the messages we send prior to sending back the
1824 ACK. The code can cope with this, but to try and avoid the
1825 unnecessary serial traffic, and "spurious" characters displayed
1826 to the user, we cheat and reset the debug protocol. The problems
1827 seems to be caused by a check on the number of arguments, and the
1828 command length, within the monitor causing it to echo the command
1830 if (mips_monitor
== MON_PMON
)
1833 mips_enter_debug ();
1836 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1838 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1839 &rpc
, &rfp
, &rsp
, flags
);
1842 char buf
[MAX_REGISTER_RAW_SIZE
];
1844 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1845 supply_register (PC_REGNUM
, buf
);
1847 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1848 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1850 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1851 supply_register (SP_REGNUM
, buf
);
1853 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1854 supply_register (FP_REGNUM
, buf
);
1860 for (i
= 0; i
<= 2; i
++)
1861 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1863 else if (flags
[i
] == '\000')
1868 if (strcmp (target_shortname
, "lsi") == 0)
1871 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1872 Right now, PMON doesn't give us enough information to determine which
1873 breakpoint we hit. So we have to look up the PC in our own table
1874 of breakpoints, and if found, assume it's just a normal instruction
1875 fetch breakpoint, not a data watchpoint. FIXME when PMON
1876 provides some way to tell us what type of breakpoint it is. */
1878 CORE_ADDR pc
= read_pc ();
1881 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1883 if (lsi_breakpoints
[i
].addr
== pc
1884 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1891 /* If a data breakpoint was hit, PMON returns the following packet:
1893 The return packet from an ordinary breakpoint doesn't have the
1894 extra 0x01 field tacked onto the end. */
1895 if (nfields
== 1 && rpc
== 1)
1900 /* NOTE: The following (sig) numbers are defined by PMON:
1901 SPP_SIGTRAP 5 breakpoint
1909 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1910 and so on, because the constants we want here are determined by the
1911 MIPS protocol and have nothing to do with what host we are running on. */
1912 if ((rstatus
& 0xff) == 0)
1914 status
->kind
= TARGET_WAITKIND_EXITED
;
1915 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1917 else if ((rstatus
& 0xff) == 0x7f)
1919 status
->kind
= TARGET_WAITKIND_STOPPED
;
1920 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1922 /* If the stop PC is in the _exit function, assume
1923 we hit the 'break 0x3ff' instruction in _exit, so this
1924 is not a normal breakpoint. */
1925 if (strcmp (target_shortname
, "lsi") == 0)
1928 CORE_ADDR func_start
;
1929 CORE_ADDR pc
= read_pc ();
1931 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1932 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1933 && func_start
== pc
)
1934 status
->kind
= TARGET_WAITKIND_EXITED
;
1939 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1940 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1946 /* We have to map between the register numbers used by gdb and the
1947 register numbers used by the debugging protocol. This function
1948 assumes that we are using tm-mips.h. */
1950 #define REGNO_OFFSET 96
1953 mips_map_regno (regno
)
1958 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1959 return regno
- FP0_REGNUM
+ 32;
1963 return REGNO_OFFSET
+ 0;
1965 return REGNO_OFFSET
+ 1;
1967 return REGNO_OFFSET
+ 2;
1969 return REGNO_OFFSET
+ 3;
1971 return REGNO_OFFSET
+ 4;
1973 return REGNO_OFFSET
+ 5;
1975 /* FIXME: Is there a way to get the status register? */
1980 /* Fetch the remote registers. */
1983 mips_fetch_registers (regno
)
1986 unsigned LONGEST val
;
1991 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1992 mips_fetch_registers (regno
);
1996 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1997 /* FP_REGNUM on the mips is a hack which is just supposed to read
1998 zero (see also mips-nat.c). */
2002 /* If PMON doesn't support this register, don't waste serial
2003 bandwidth trying to read it. */
2004 int pmon_reg
= mips_map_regno (regno
);
2005 if (regno
!= 0 && pmon_reg
== 0)
2009 /* Unfortunately the PMON version in the Vr4300 board has been
2010 compiled without the 64bit register access commands. This
2011 means we cannot get hold of the full register width. */
2012 if (mips_monitor
== MON_DDB
)
2013 val
= (unsigned) mips_request ('t', (unsigned int) pmon_reg
,
2014 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2016 val
= mips_request ('r', (unsigned int) pmon_reg
,
2017 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2019 mips_error ("Can't read register %d: %s", regno
,
2020 safe_strerror (errno
));
2025 char buf
[MAX_REGISTER_RAW_SIZE
];
2027 /* We got the number the register holds, but gdb expects to see a
2028 value in the target byte ordering. */
2029 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
2030 supply_register (regno
, buf
);
2034 /* Prepare to store registers. The MIPS protocol can store individual
2035 registers, so this function doesn't have to do anything. */
2038 mips_prepare_to_store ()
2042 /* Store remote register(s). */
2045 mips_store_registers (regno
)
2052 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2053 mips_store_registers (regno
);
2057 mips_request ('R', (unsigned int) mips_map_regno (regno
),
2058 read_register (regno
),
2059 &err
, mips_receive_wait
, NULL
);
2061 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2064 /* Fetch a word from the target board. */
2067 mips_fetch_word (addr
)
2073 /* FIXME! addr was cast to uint! */
2074 val
= mips_request ('d', addr
, (unsigned int) 0, &err
,
2075 mips_receive_wait
, NULL
);
2078 /* Data space failed; try instruction space. */
2079 /* FIXME! addr was cast to uint! */
2080 val
= mips_request ('i', addr
, (unsigned int) 0, &err
,
2081 mips_receive_wait
, NULL
);
2083 mips_error ("Can't read address 0x%s: %s",
2084 paddr_nz (addr
), safe_strerror (errno
));
2089 /* Store a word to the target board. Returns errno code or zero for
2090 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2091 memory location there. */
2093 /* FIXME! make sure only 32-bit quantities get stored! */
2095 mips_store_word (addr
, val
, old_contents
)
2101 unsigned int oldcontents
;
2103 oldcontents
= mips_request ('D', addr
, (unsigned int) val
,
2105 mips_receive_wait
, NULL
);
2108 /* Data space failed; try instruction space. */
2109 oldcontents
= mips_request ('I', addr
,
2110 (unsigned int) val
, &err
,
2111 mips_receive_wait
, NULL
);
2115 if (old_contents
!= NULL
)
2116 store_unsigned_integer (old_contents
, 4, oldcontents
);
2120 /* Read or write LEN bytes from inferior memory at MEMADDR,
2121 transferring to or from debugger address MYADDR. Write to inferior
2122 if SHOULD_WRITE is nonzero. Returns length of data written or
2123 read; 0 for error. Note that protocol gives us the correct value
2124 for a longword, since it transfers values in ASCII. We want the
2125 byte values, so we have to swap the longword values. */
2128 mips_xfer_memory (memaddr
, myaddr
, len
, write
, ignore
)
2133 struct target_ops
*ignore
;
2136 /* Round starting address down to longword boundary. */
2137 register CORE_ADDR addr
= memaddr
& ~3;
2138 /* Round ending address up; get number of longwords that makes. */
2139 register int count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2140 /* Allocate buffer of that many longwords. */
2141 register char *buffer
= alloca (count
* 4);
2147 /* Fill start and end extra bytes of buffer with existing data. */
2148 if (addr
!= memaddr
|| len
< 4)
2150 /* Need part of initial word -- fetch it. */
2151 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2156 /* Need part of last word -- fetch it. FIXME: we do this even
2157 if we don't need it. */
2158 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2159 mips_fetch_word (addr
+ (count
- 1) * 4));
2162 /* Copy data to be written over corresponding part of buffer */
2164 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2166 /* Write the entire buffer. */
2168 for (i
= 0; i
< count
; i
++, addr
+= 4)
2170 status
= mips_store_word (addr
,
2171 extract_unsigned_integer (&buffer
[i
* 4], 4),
2173 /* Report each kilobyte (we download 32-bit words at a time) */
2176 printf_unfiltered ("*");
2177 gdb_flush (gdb_stdout
);
2184 /* FIXME: Do we want a QUIT here? */
2187 printf_unfiltered ("\n");
2191 /* Read all the longwords */
2192 for (i
= 0; i
< count
; i
++, addr
+= 4)
2194 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2198 /* Copy appropriate bytes out of the buffer. */
2199 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2204 /* Print info on this target. */
2207 mips_files_info (ignore
)
2208 struct target_ops
*ignore
;
2210 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2213 /* Kill the process running on the board. This will actually only
2214 work if we are doing remote debugging over the console input. I
2215 think that if IDT/sim had the remote debug interrupt enabled on the
2216 right port, we could interrupt the process with a break signal. */
2221 if (!mips_wait_flag
)
2226 if (interrupt_count
>= 2)
2228 interrupt_count
= 0;
2230 target_terminal_ours ();
2232 if (query ("Interrupted while waiting for the program.\n\
2233 Give up (and stop debugging it)? "))
2235 /* Clean up in such a way that mips_close won't try to talk to the
2236 board (it almost surely won't work since we weren't able to talk to
2241 printf_unfiltered ("Ending remote MIPS debugging.\n");
2242 target_mourn_inferior ();
2244 return_to_top_level (RETURN_QUIT
);
2247 target_terminal_inferior ();
2250 if (remote_debug
> 0)
2251 printf_unfiltered ("Sending break\n");
2253 SERIAL_SEND_BREAK (mips_desc
);
2262 SERIAL_WRITE (mips_desc
, &cc
, 1);
2264 target_mourn_inferior ();
2269 /* Start running on the target board. */
2272 mips_create_inferior (execfile
, args
, env
)
2282 Can't pass arguments to remote MIPS board; arguments ignored.");
2283 /* And don't try to use them on the next "run" command. */
2284 execute_command ("set args", 0);
2287 if (execfile
== 0 || exec_bfd
== 0)
2288 error ("No executable file specified");
2290 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2292 init_wait_for_inferior ();
2294 /* FIXME: Should we set inferior_pid here? */
2296 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2299 /* Clean up after a process. Actually nothing to do. */
2302 mips_mourn_inferior ()
2304 if (current_ops
!= NULL
)
2305 unpush_target (current_ops
);
2306 generic_mourn_inferior ();
2309 /* We can write a breakpoint and read the shadow contents in one
2312 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2313 support, we read the contents of the target location and stash it,
2314 then overwrite it with a breakpoint instruction. ADDR is the target
2315 location in the target machine. CONTENTS_CACHE is a pointer to
2316 memory allocated for saving the target contents. It is guaranteed
2317 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2318 is accomplished via BREAKPOINT_MAX). */
2321 mips_insert_breakpoint (addr
, contents_cache
)
2323 char *contents_cache
;
2325 if (monitor_supports_breakpoints
)
2326 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2328 return memory_insert_breakpoint (addr
, contents_cache
);
2332 mips_remove_breakpoint (addr
, contents_cache
)
2334 char *contents_cache
;
2336 if (monitor_supports_breakpoints
)
2337 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2339 return memory_remove_breakpoint (addr
, contents_cache
);
2342 #if 0 /* currently not used */
2343 /* PMON does not currently provide support for the debug mode 'b'
2344 commands to manipulate breakpoints. However, if we wanted to use
2345 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2346 then this code performs the work needed to leave debug mode,
2347 set/clear the breakpoint, and then return to debug mode. */
2349 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2350 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2351 /* NOTE: The code relies on this vector being zero-initialised by the system */
2354 pmon_insert_breakpoint (addr
, contents_cache
)
2356 char *contents_cache
;
2360 if (monitor_supports_breakpoints
)
2362 char tbuff
[12]; /* space for breakpoint command */
2366 /* PMON does not support debug level breakpoint set/remove: */
2367 if (mips_exit_debug ())
2368 mips_error ("Failed to exit debug mode");
2370 sprintf (tbuff
, "b %08x\r", addr
);
2371 mips_send_command (tbuff
, 0);
2373 mips_expect ("Bpt ");
2375 if (!mips_getstring (tbuff
, 2))
2377 tbuff
[2] = '\0'; /* terminate the string */
2378 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2380 fprintf_unfiltered (gdb_stderr
,
2381 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2385 mips_expect (" = ");
2387 /* Lead in the hex number we are expecting: */
2391 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2392 which targets return 64-bit addresses? PMON returns only 32! */
2393 if (!mips_getstring (&tbuff
[2], 8))
2395 tbuff
[10] = '\0'; /* terminate the string */
2397 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2399 fprintf_unfiltered (gdb_stderr
,
2400 "Invalid hex address from target: %s\n", tbuff
);
2404 if (bpnum
>= PMON_MAX_BP
)
2406 fprintf_unfiltered (gdb_stderr
,
2407 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2408 bpnum
, PMON_MAX_BP
- 1);
2413 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2415 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2417 mips_expect ("\r\n");
2418 mips_expect (mips_monitor_prompt
);
2420 mips_enter_debug ();
2425 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2429 pmon_remove_breakpoint (addr
, contents_cache
)
2431 char *contents_cache
;
2433 if (monitor_supports_breakpoints
)
2436 char tbuff
[7]; /* enough for delete breakpoint command */
2438 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2439 if (mips_pmon_bp_info
[bpnum
] == addr
)
2442 if (bpnum
>= PMON_MAX_BP
)
2444 fprintf_unfiltered (gdb_stderr
,
2445 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2450 if (mips_exit_debug ())
2451 mips_error ("Failed to exit debug mode");
2453 sprintf (tbuff
, "db %02d\r", bpnum
);
2455 mips_send_command (tbuff
, -1);
2456 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2457 set" message will be returned. */
2459 mips_enter_debug ();
2464 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2469 /* Tell whether this target can support a hardware breakpoint. CNT
2470 is the number of hardware breakpoints already installed. This
2471 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2474 remote_mips_can_use_hardware_watchpoint (cnt
)
2477 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2481 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2482 This is used for memory ref breakpoints. */
2484 static unsigned long
2485 calculate_mask (addr
, len
)
2492 mask
= addr
^ (addr
+ len
- 1);
2494 for (i
= 32; i
>= 0; i
--)
2500 mask
= (unsigned long) 0xffffffff >> i
;
2506 /* Insert a hardware breakpoint. This works only on LSI targets, which
2507 implement ordinary breakpoints using hardware facilities. */
2510 remote_mips_insert_hw_breakpoint (addr
, contents_cache
)
2512 char *contents_cache
;
2514 if (strcmp (target_shortname
, "lsi") == 0)
2515 return mips_insert_breakpoint (addr
, contents_cache
);
2521 /* Remove a hardware breakpoint. This works only on LSI targets, which
2522 implement ordinary breakpoints using hardware facilities. */
2525 remote_mips_remove_hw_breakpoint (addr
, contents_cache
)
2527 char *contents_cache
;
2529 if (strcmp (target_shortname
, "lsi") == 0)
2530 return mips_remove_breakpoint (addr
, contents_cache
);
2535 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2536 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2540 remote_mips_set_watchpoint (addr
, len
, type
)
2545 if (set_breakpoint (addr
, len
, type
))
2552 remote_mips_remove_watchpoint (addr
, len
, type
)
2557 if (clear_breakpoint (addr
, len
, type
))
2564 remote_mips_stopped_by_watchpoint ()
2566 return hit_watchpoint
;
2570 /* Insert a breakpoint. */
2573 set_breakpoint (addr
, len
, type
)
2576 enum break_type type
;
2578 return common_breakpoint (1, addr
, len
, type
);
2582 /* Clear a breakpoint. */
2585 clear_breakpoint (addr
, len
, type
)
2588 enum break_type type
;
2590 return common_breakpoint (0, addr
, len
, type
);
2594 /* Check the error code from the return packet for an LSI breakpoint
2595 command. If there's no error, just return 0. If it's a warning,
2596 print the warning text and return 0. If it's an error, print
2597 the error text and return 1. <ADDR> is the address of the breakpoint
2598 that was being set. <RERRFLG> is the error code returned by PMON.
2599 This is a helper function for common_breakpoint. */
2602 check_lsi_error (addr
, rerrflg
)
2606 struct lsi_error
*err
;
2607 char *saddr
= paddr_nz (addr
); /* printable address string */
2609 if (rerrflg
== 0) /* no error */
2612 /* Warnings can be ORed together, so check them all. */
2613 if (rerrflg
& W_WARN
)
2615 if (monitor_warnings
)
2618 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2620 if ((err
->code
& rerrflg
) == err
->code
)
2623 fprintf_unfiltered (gdb_stderr
,
2624 "common_breakpoint (0x%s): Warning: %s\n",
2630 fprintf_unfiltered (gdb_stderr
,
2631 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2638 /* Errors are unique, i.e. can't be ORed together. */
2639 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2641 if ((err
->code
& rerrflg
) == err
->code
)
2643 fprintf_unfiltered (gdb_stderr
,
2644 "common_breakpoint (0x%s): Error: %s\n",
2650 fprintf_unfiltered (gdb_stderr
,
2651 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2658 /* This routine sends a breakpoint command to the remote target.
2660 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2661 <ADDR> is the address of the breakpoint.
2662 <LEN> the length of the region to break on.
2663 <TYPE> is the type of breakpoint:
2664 0 = write (BREAK_WRITE)
2665 1 = read (BREAK_READ)
2666 2 = read/write (BREAK_ACCESS)
2667 3 = instruction fetch (BREAK_FETCH)
2669 Return 0 if successful; otherwise 1. */
2672 common_breakpoint (set
, addr
, len
, type
)
2676 enum break_type type
;
2678 char buf
[DATA_MAXLEN
+ 1];
2680 int rpid
, rerrflg
, rresponse
, rlen
;
2683 addr
= ADDR_BITS_REMOVE (addr
);
2685 if (mips_monitor
== MON_LSI
)
2687 if (set
== 0) /* clear breakpoint */
2689 /* The LSI PMON "clear breakpoint" has this form:
2690 <pid> 'b' <bptn> 0x0
2692 <pid> 'b' 0x0 <code>
2694 <bptn> is a breakpoint number returned by an earlier 'B' command.
2695 Possible return codes: OK, E_BPT. */
2699 /* Search for the breakpoint in the table. */
2700 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2701 if (lsi_breakpoints
[i
].type
== type
2702 && lsi_breakpoints
[i
].addr
== addr
2703 && lsi_breakpoints
[i
].len
== len
)
2706 /* Clear the table entry and tell PMON to clear the breakpoint. */
2707 if (i
== MAX_LSI_BREAKPOINTS
)
2709 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2714 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2715 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2716 mips_send_packet (buf
, 1);
2718 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2721 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2723 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2725 return (check_lsi_error (addr
, rerrflg
));
2728 /* set a breakpoint */
2730 /* The LSI PMON "set breakpoint" command has this form:
2731 <pid> 'B' <addr> 0x0
2733 <pid> 'B' <bptn> <code>
2735 The "set data breakpoint" command has this form:
2737 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2739 where: type= "0x1" = read
2741 "0x3" = access (read or write)
2743 The reply returns two values:
2744 bptn - a breakpoint number, which is a small integer with
2745 possible values of zero through 255.
2746 code - an error return code, a value of zero indicates a
2747 succesful completion, other values indicate various
2748 errors and warnings.
2750 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2754 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2757 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2763 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2764 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2765 paddr_nz (addr
+ len
- 1));
2767 mips_send_packet (buf
, 1);
2769 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2772 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2773 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2774 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2775 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2778 if (check_lsi_error (addr
, rerrflg
))
2781 /* rresponse contains PMON's breakpoint number. Record the
2782 information for this breakpoint so we can clear it later. */
2783 lsi_breakpoints
[rresponse
].type
= type
;
2784 lsi_breakpoints
[rresponse
].addr
= addr
;
2785 lsi_breakpoints
[rresponse
].len
= len
;
2792 /* On non-LSI targets, the breakpoint command has this form:
2793 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2794 <MASK> is a don't care mask for addresses.
2795 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2799 mask
= calculate_mask (addr
, len
);
2802 if (set
) /* set a breakpoint */
2807 case BREAK_WRITE
: /* write */
2810 case BREAK_READ
: /* read */
2813 case BREAK_ACCESS
: /* read/write */
2816 case BREAK_FETCH
: /* fetch */
2824 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2825 paddr_nz (mask
), flags
);
2830 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2833 mips_send_packet (buf
, 1);
2835 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2838 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2839 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2841 if (nfields
!= 4 || rcmd
!= cmd
)
2842 mips_error ("common_breakpoint: Bad response from remote board: %s",
2847 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2848 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2849 if (mips_monitor
== MON_DDB
)
2850 rresponse
= rerrflg
;
2851 if (rresponse
!= 22) /* invalid argument */
2852 fprintf_unfiltered (gdb_stderr
,
2853 "common_breakpoint (0x%s): Got error: 0x%x\n",
2854 paddr_nz (addr
), rresponse
);
2862 send_srec (srec
, len
, addr
)
2871 SERIAL_WRITE (mips_desc
, srec
, len
);
2873 ch
= mips_readchar (2);
2877 case SERIAL_TIMEOUT
:
2878 error ("Timeout during download.");
2882 case 0x15: /* NACK */
2883 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %d! Retrying.\n", addr
);
2886 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2891 /* Download a binary file by converting it to S records. */
2894 mips_load_srec (args
)
2899 char *buffer
, srec
[1024];
2901 unsigned int srec_frame
= 200;
2903 static int hashmark
= 1;
2905 buffer
= alloca (srec_frame
* 2 + 256);
2907 abfd
= bfd_openr (args
, 0);
2910 printf_filtered ("Unable to open file %s\n", args
);
2914 if (bfd_check_format (abfd
, bfd_object
) == 0)
2916 printf_filtered ("File is not an object file\n");
2920 /* This actually causes a download in the IDT binary format: */
2921 mips_send_command (LOAD_CMD
, 0);
2923 for (s
= abfd
->sections
; s
; s
= s
->next
)
2925 if (s
->flags
& SEC_LOAD
)
2927 unsigned int numbytes
;
2929 /* FIXME! vma too small?? */
2930 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
,
2931 s
->vma
+ s
->_raw_size
);
2932 gdb_flush (gdb_stdout
);
2934 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2936 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2938 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2940 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2941 send_srec (srec
, reclen
, s
->vma
+ i
);
2945 putchar_unfiltered ('#');
2946 gdb_flush (gdb_stdout
);
2949 } /* Per-packet (or S-record) loop */
2951 putchar_unfiltered ('\n');
2952 } /* Loadable sections */
2955 putchar_unfiltered ('\n');
2957 /* Write a type 7 terminator record. no data for a type 7, and there
2958 is no data, so len is 0. */
2960 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2962 send_srec (srec
, reclen
, abfd
->start_address
);
2964 SERIAL_FLUSH_INPUT (mips_desc
);
2968 * mips_make_srec -- make an srecord. This writes each line, one at a
2969 * time, each with it's own header and trailer line.
2970 * An srecord looks like this:
2972 * byte count-+ address
2973 * start ---+ | | data +- checksum
2975 * S01000006F6B692D746573742E73726563E4
2976 * S315000448600000000000000000FC00005900000000E9
2977 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2978 * S30B0004485A0000000000004E
2981 * S<type><length><address><data><checksum>
2985 * is the number of bytes following upto the checksum. Note that
2986 * this is not the number of chars following, since it takes two
2987 * chars to represent a byte.
2991 * 1) two byte address data record
2992 * 2) three byte address data record
2993 * 3) four byte address data record
2994 * 7) four byte address termination record
2995 * 8) three byte address termination record
2996 * 9) two byte address termination record
2999 * is the start address of the data following, or in the case of
3000 * a termination record, the start address of the image
3004 * is the sum of all the raw byte data in the record, from the length
3005 * upwards, modulo 256 and subtracted from 255.
3007 * This routine returns the length of the S-record.
3012 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
3016 unsigned char *myaddr
;
3019 unsigned char checksum
;
3022 /* Create the header for the srec. addr_size is the number of bytes in the address,
3023 and 1 is the number of bytes in the count. */
3025 /* FIXME!! bigger buf required for 64-bit! */
3028 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
3029 /* This assumes S3 style downloads (4byte addresses). There should
3030 probably be a check, or the code changed to make it more
3032 buf
[3] = memaddr
>> 24;
3033 buf
[4] = memaddr
>> 16;
3034 buf
[5] = memaddr
>> 8;
3036 memcpy (&buf
[7], myaddr
, len
);
3038 /* Note that the checksum is calculated on the raw data, not the
3039 hexified data. It includes the length, address and the data
3040 portions of the packet. */
3042 buf
+= 2; /* Point at length byte */
3043 for (i
= 0; i
< len
+ 4 + 1; i
++)
3051 /* The following manifest controls whether we enable the simple flow
3052 control support provided by the monitor. If enabled the code will
3053 wait for an affirmative ACK between transmitting packets. */
3054 #define DOETXACK (1)
3056 /* The PMON fast-download uses an encoded packet format constructed of
3057 3byte data packets (encoded as 4 printable ASCII characters), and
3058 escape sequences (preceded by a '/'):
3061 'C' compare checksum (12bit value, not included in checksum calculation)
3062 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3063 'Z' zero fill multiple of 3bytes
3064 'B' byte (12bit encoded value, of 8bit data)
3065 'A' address (36bit encoded value)
3066 'E' define entry as original address, and exit load
3068 The packets are processed in 4 character chunks, so the escape
3069 sequences that do not have any data (or variable length data)
3070 should be padded to a 4 character boundary. The decoder will give
3071 an error if the complete message block size is not a multiple of
3072 4bytes (size of record).
3074 The encoding of numbers is done in 6bit fields. The 6bit value is
3075 used to index into this string to get the specific character
3076 encoding for the value: */
3077 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3079 /* Convert the number of bits required into an encoded number, 6bits
3080 at a time (range 0..63). Keep a checksum if required (passed
3081 pointer non-NULL). The function returns the number of encoded
3082 characters written into the buffer. */
3084 pmon_makeb64 (v
, p
, n
, chksum
)
3090 int count
= (n
/ 6);
3094 fprintf_unfiltered (gdb_stderr
,
3095 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
3100 fprintf_unfiltered (gdb_stderr
,
3101 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3105 /* Deal with the checksum: */
3111 *chksum
+= ((v
>> 24) & 0xFFF);
3113 *chksum
+= ((v
>> 12) & 0xFFF);
3115 *chksum
+= ((v
>> 0) & 0xFFF);
3122 *p
++ = encoding
[(v
>> n
) & 0x3F];
3129 /* Shorthand function (that could be in-lined) to output the zero-fill
3130 escape sequence into the data stream. */
3132 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3136 unsigned int *chksum
;
3140 sprintf (*buff
, "/Z");
3141 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3142 *buff
+= (count
+ 2);
3144 return (recsize
+ count
+ 2);
3148 pmon_checkset (recsize
, buff
, value
)
3155 /* Add the checksum (without updating the value): */
3156 sprintf (*buff
, "/C");
3157 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3158 *buff
+= (count
+ 2);
3159 sprintf (*buff
, "\n");
3160 *buff
+= 2; /* include zero terminator */
3161 /* Forcing a checksum validation clears the sum: */
3163 return (recsize
+ count
+ 3);
3166 /* Amount of padding we leave after at the end of the output buffer,
3167 for the checksum and line termination characters: */
3168 #define CHECKSIZE (4 + 4 + 4 + 2)
3169 /* zero-fill, checksum, transfer end and line termination space. */
3171 /* The amount of binary data loaded from the object file in a single
3173 #define BINCHUNK (1024)
3175 /* Maximum line of data accepted by the monitor: */
3176 #define MAXRECSIZE (550)
3177 /* NOTE: This constant depends on the monitor being used. This value
3178 is for PMON 5.x on the Cogent Vr4300 board. */
3181 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3183 unsigned char *inbuf
;
3188 unsigned int *zerofill
;
3193 /* This is a simple check to ensure that our data will fit within
3194 the maximum allowable record size. Each record output is 4bytes
3195 in length. We must allow space for a pending zero fill command,
3196 the record, and a checksum record. */
3197 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3199 /* Process the binary data: */
3200 if ((inamount
- *inptr
) < 3)
3203 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3205 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3207 *recsize
+= (2 + count
);
3212 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3213 /* Simple check for zero data. TODO: A better check would be
3214 to check the last, and then the middle byte for being zero
3215 (if the first byte is not). We could then check for
3216 following runs of zeros, and if above a certain size it is
3217 worth the 4 or 8 character hit of the byte insertions used
3218 to pad to the start of the zeroes. NOTE: This also depends
3219 on the alignment at the end of the zero run. */
3220 if (value
== 0x00000000)
3223 if (*zerofill
== 0xFFF) /* 12bit counter */
3224 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3229 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3230 count
= pmon_makeb64 (value
, p
, 24, csum
);
3243 pmon_check_ack (mesg
)
3246 #if defined(DOETXACK)
3251 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3252 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3254 fprintf_unfiltered (gdb_stderr
,
3255 "Failed to receive valid ACK for %s\n", mesg
);
3256 return (-1); /* terminate the download */
3259 #endif /* DOETXACK */
3263 /* pmon_download - Send a sequence of characters to the PMON download port,
3264 which is either a serial port or a UDP socket. */
3267 pmon_start_download ()
3271 /* Create the temporary download file. */
3272 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3273 perror_with_name (tftp_localname
);
3277 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3278 mips_expect ("Downloading from ");
3279 mips_expect (udp_in_use
? "udp" : "tty0");
3280 mips_expect (", ^C to abort\r\n");
3285 mips_expect_download (char *string
)
3287 if (!mips_expect (string
))
3289 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3291 remove (tftp_localname
); /* Remove temporary file */
3299 pmon_end_download (final
, bintotal
)
3303 char hexnumber
[9]; /* includes '\0' space */
3307 static char *load_cmd_prefix
= "load -b -s ";
3311 /* Close off the temporary file containing the load data. */
3315 /* Make the temporary file readable by the world. */
3316 if (stat (tftp_localname
, &stbuf
) == 0)
3317 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3319 /* Must reinitialize the board to prevent PMON from crashing. */
3320 mips_send_command ("initEther\r", -1);
3322 /* Send the load command. */
3323 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3324 strcpy (cmd
, load_cmd_prefix
);
3325 strcat (cmd
, tftp_name
);
3327 mips_send_command (cmd
, 0);
3329 if (!mips_expect_download ("Downloading from "))
3331 if (!mips_expect_download (tftp_name
))
3333 if (!mips_expect_download (", ^C to abort\r\n"))
3337 /* Wait for the stuff that PMON prints after the load has completed.
3338 The timeout value for use in the tftp case (15 seconds) was picked
3339 arbitrarily but might be too small for really large downloads. FIXME. */
3340 if (mips_monitor
== MON_LSI
)
3342 pmon_check_ack ("termination");
3343 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3346 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3348 sprintf (hexnumber
, "%x", final
);
3349 mips_expect (hexnumber
);
3350 mips_expect ("\r\n");
3351 if (mips_monitor
!= MON_LSI
)
3352 pmon_check_ack ("termination");
3353 mips_expect ("\r\ntotal = 0x");
3354 sprintf (hexnumber
, "%x", bintotal
);
3355 mips_expect (hexnumber
);
3356 if (!mips_expect_download (" bytes\r\n"))
3360 remove (tftp_localname
); /* Remove temporary file */
3364 pmon_download (buffer
, length
)
3369 fwrite (buffer
, 1, length
, tftp_file
);
3371 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3375 pmon_load_fast (file
)
3380 unsigned char *binbuf
;
3383 unsigned int csum
= 0;
3384 int hashmark
= !tftp_in_use
;
3389 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3390 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3392 abfd
= bfd_openr (file
, 0);
3395 printf_filtered ("Unable to open file %s\n", file
);
3399 if (bfd_check_format (abfd
, bfd_object
) == 0)
3401 printf_filtered ("File is not an object file\n");
3405 /* Setup the required download state: */
3406 mips_send_command ("set dlproto etxack\r", -1);
3407 mips_send_command ("set dlecho off\r", -1);
3408 /* NOTE: We get a "cannot set variable" message if the variable is
3409 already defined to have the argument we give. The code doesn't
3410 care, since it just scans to the next prompt anyway. */
3411 /* Start the download: */
3412 pmon_start_download ();
3414 /* Zero the checksum */
3415 sprintf (buffer
, "/Kxx\n");
3416 reclen
= strlen (buffer
);
3417 pmon_download (buffer
, reclen
);
3418 finished
= pmon_check_ack ("/Kxx");
3420 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3421 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3423 bintotal
+= s
->_raw_size
;
3424 final
= (s
->vma
+ s
->_raw_size
);
3426 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3427 (unsigned int) (s
->vma
+ s
->_raw_size
));
3428 gdb_flush (gdb_stdout
);
3430 /* Output the starting address */
3431 sprintf (buffer
, "/A");
3432 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3433 buffer
[2 + reclen
] = '\n';
3434 buffer
[3 + reclen
] = '\0';
3435 reclen
+= 3; /* for the initial escape code and carriage return */
3436 pmon_download (buffer
, reclen
);
3437 finished
= pmon_check_ack ("/A");
3441 unsigned int binamount
;
3442 unsigned int zerofill
= 0;
3448 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3452 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3454 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3456 /* This keeps a rolling checksum, until we decide to output
3458 for (; ((binamount
- binptr
) > 0);)
3460 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3461 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3463 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3464 pmon_download (buffer
, reclen
);
3465 finished
= pmon_check_ack ("data record");
3468 zerofill
= 0; /* do not transmit pending zerofills */
3474 putchar_unfiltered ('#');
3475 gdb_flush (gdb_stdout
);
3479 reclen
= 0; /* buffer processed */
3484 /* Ensure no out-standing zerofill requests: */
3486 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3488 /* and then flush the line: */
3491 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3492 /* Currently pmon_checkset outputs the line terminator by
3493 default, so we write out the buffer so far: */
3494 pmon_download (buffer
, reclen
);
3495 finished
= pmon_check_ack ("record remnant");
3499 putchar_unfiltered ('\n');
3502 /* Terminate the transfer. We know that we have an empty output
3503 buffer at this point. */
3504 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3505 reclen
= strlen (buffer
);
3506 pmon_download (buffer
, reclen
);
3509 { /* Ignore the termination message: */
3510 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3513 { /* Deal with termination message: */
3514 pmon_end_download (final
, bintotal
);
3520 /* mips_load -- download a file. */
3523 mips_load (file
, from_tty
)
3527 /* Get the board out of remote debugging mode. */
3528 if (mips_exit_debug ())
3529 error ("mips_load: Couldn't get into monitor mode.");
3531 if (mips_monitor
!= MON_IDT
)
3532 pmon_load_fast (file
);
3534 mips_load_srec (file
);
3538 /* Finally, make the PC point at the start address */
3539 if (mips_monitor
!= MON_IDT
)
3541 /* Work around problem where PMON monitor updates the PC after a load
3542 to a different value than GDB thinks it has. The following ensures
3543 that the write_pc() WILL update the PC value: */
3544 register_valid
[PC_REGNUM
] = 0;
3547 write_pc (bfd_get_start_address (exec_bfd
));
3549 inferior_pid
= 0; /* No process now */
3551 /* This is necessary because many things were based on the PC at the time that
3552 we attached to the monitor, which is no longer valid now that we have loaded
3553 new code (and just changed the PC). Another way to do this might be to call
3554 normal_stop, except that the stack may not be valid, and things would get
3555 horribly confused... */
3557 clear_symtab_users ();
3561 /* Pass the command argument as a packet to PMON verbatim. */
3564 pmon_command (args
, from_tty
)
3568 char buf
[DATA_MAXLEN
+ 1];
3571 sprintf (buf
, "0x0 %s", args
);
3572 mips_send_packet (buf
, 1);
3573 printf_filtered ("Send packet: %s\n", buf
);
3575 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3577 printf_filtered ("Received packet: %s\n", buf
);
3581 _initialize_remote_mips ()
3583 /* Initialize the fields in mips_ops that are common to all four targets. */
3584 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3585 mips_ops
.to_close
= mips_close
;
3586 mips_ops
.to_detach
= mips_detach
;
3587 mips_ops
.to_resume
= mips_resume
;
3588 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3589 mips_ops
.to_store_registers
= mips_store_registers
;
3590 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3591 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3592 mips_ops
.to_files_info
= mips_files_info
;
3593 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3594 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3595 mips_ops
.to_kill
= mips_kill
;
3596 mips_ops
.to_load
= mips_load
;
3597 mips_ops
.to_create_inferior
= mips_create_inferior
;
3598 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3599 mips_ops
.to_stratum
= process_stratum
;
3600 mips_ops
.to_has_all_memory
= 1;
3601 mips_ops
.to_has_memory
= 1;
3602 mips_ops
.to_has_stack
= 1;
3603 mips_ops
.to_has_registers
= 1;
3604 mips_ops
.to_has_execution
= 1;
3605 mips_ops
.to_magic
= OPS_MAGIC
;
3607 /* Copy the common fields to all four target vectors. */
3608 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3610 /* Initialize target-specific fields in the target vectors. */
3611 mips_ops
.to_shortname
= "mips";
3612 mips_ops
.to_doc
= "\
3613 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3614 The argument is the device it is connected to or, if it contains a colon,\n\
3615 HOST:PORT to access a board over a network";
3616 mips_ops
.to_open
= mips_open
;
3617 mips_ops
.to_wait
= mips_wait
;
3619 pmon_ops
.to_shortname
= "pmon";
3620 pmon_ops
.to_doc
= "\
3621 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3622 line. The argument is the device it is connected to or, if it contains a\n\
3623 colon, HOST:PORT to access a board over a network";
3624 pmon_ops
.to_open
= pmon_open
;
3625 pmon_ops
.to_wait
= mips_wait
;
3627 ddb_ops
.to_shortname
= "ddb";
3629 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3630 line. The first argument is the device it is connected to or, if it contains\n\
3631 a colon, HOST:PORT to access a board over a network. The optional second\n\
3632 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3633 TFTP downloads to the board. The optional third parameter is the local name\n\
3634 of the TFTP temporary file, if it differs from the filename seen by the board.";
3635 ddb_ops
.to_open
= ddb_open
;
3636 ddb_ops
.to_wait
= mips_wait
;
3638 lsi_ops
.to_shortname
= "lsi";
3639 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3640 lsi_ops
.to_open
= lsi_open
;
3641 lsi_ops
.to_wait
= mips_wait
;
3643 /* Add the targets. */
3644 add_target (&mips_ops
);
3645 add_target (&pmon_ops
);
3646 add_target (&ddb_ops
);
3647 add_target (&lsi_ops
);
3650 add_set_cmd ("timeout", no_class
, var_zinteger
,
3651 (char *) &mips_receive_wait
,
3652 "Set timeout in seconds for remote MIPS serial I/O.",
3657 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3658 (char *) &mips_retransmit_wait
,
3659 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3660 This is the number of seconds to wait for an acknowledgement to a packet\n\
3661 before resending the packet.", &setlist
),
3665 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3666 (char *) &mips_syn_garbage
,
3667 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3668 This is the maximum number of characters GDB will ignore when trying to\n\
3669 synchronize with the remote system. A value of -1 means that there is no limit\n\
3670 (Note that these characters are printed out even though they are ignored.)",
3675 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3676 (char *) &mips_monitor_prompt
,
3677 "Set the prompt that GDB expects from the monitor.",
3682 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3683 (char *) &monitor_warnings
,
3684 "Set printing of monitor warnings.\n"
3685 "When enabled, monitor warnings about hardware breakpoints "
3686 "will be displayed.",
3690 add_com ("pmon <command>", class_obscure
, pmon_command
,
3691 "Send a packet to PMON (must be in debug mode).");