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>
39 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
41 #define S_IROTH S_IREAD
44 extern void mips_set_processor_type_command
PARAMS ((char *, int));
47 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
48 types passed by breakpoint.c to target_insert_watchpoint.
49 Value 3 is our own invention, and is used for ordinary instruction
50 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
60 /* Prototypes for local functions. */
62 static int mips_readchar
PARAMS ((int timeout
));
64 static int mips_receive_header
PARAMS ((unsigned char *hdr
, int *pgarbage
,
65 int ch
, int timeout
));
67 static int mips_receive_trailer
PARAMS ((unsigned char *trlr
, int *pgarbage
,
68 int *pch
, int timeout
));
70 static int mips_cksum
PARAMS ((const unsigned char *hdr
,
71 const unsigned char *data
,
74 static void mips_send_packet
PARAMS ((const char *s
, int get_ack
));
76 static void mips_send_command
PARAMS ((const char *cmd
, int prompt
));
78 static int mips_receive_packet
PARAMS ((char *buff
, int throw_error
,
81 static CORE_ADDR mips_request
PARAMS ((int cmd
, CORE_ADDR addr
,
82 CORE_ADDR data
, int *perr
, int timeout
,
85 static void mips_initialize
PARAMS ((void));
87 static void mips_open
PARAMS ((char *name
, int from_tty
));
89 static void pmon_open
PARAMS ((char *name
, int from_tty
));
91 static void ddb_open
PARAMS ((char *name
, int from_tty
));
93 static void lsi_open
PARAMS ((char *name
, int from_tty
));
95 static void mips_close
PARAMS ((int quitting
));
97 static void mips_detach
PARAMS ((char *args
, int from_tty
));
99 static void mips_resume
PARAMS ((int pid
, int step
,
100 enum target_signal siggnal
));
102 static int mips_wait
PARAMS ((int pid
, struct target_waitstatus
* status
));
104 static int mips_map_regno
PARAMS ((int regno
));
106 static void mips_fetch_registers
PARAMS ((int regno
));
108 static void mips_prepare_to_store
PARAMS ((void));
110 static void mips_store_registers
PARAMS ((int regno
));
112 static unsigned int mips_fetch_word
PARAMS ((CORE_ADDR addr
));
114 static int mips_store_word
PARAMS ((CORE_ADDR addr
, unsigned int value
,
115 char *old_contents
));
117 static int mips_xfer_memory
PARAMS ((CORE_ADDR memaddr
, char *myaddr
, int len
,
118 int write
, struct target_ops
* ignore
));
120 static void mips_files_info
PARAMS ((struct target_ops
* ignore
));
122 static void mips_create_inferior
PARAMS ((char *execfile
, char *args
,
125 static void mips_mourn_inferior
PARAMS ((void));
127 static int pmon_makeb64
PARAMS ((unsigned long v
, char *p
, int n
, int *chksum
));
129 static int pmon_zeroset
PARAMS ((int recsize
, char **buff
, int *amount
,
130 unsigned int *chksum
));
132 static int pmon_checkset
PARAMS ((int recsize
, char **buff
, int *value
));
134 static void pmon_make_fastrec
PARAMS ((char **outbuf
, unsigned char *inbuf
,
135 int *inptr
, int inamount
, int *recsize
,
136 unsigned int *csum
, unsigned int *zerofill
));
138 static int pmon_check_ack
PARAMS ((char *mesg
));
140 static void pmon_start_download
PARAMS ((void));
142 static void pmon_end_download
PARAMS ((int final
, int bintotal
));
144 static void pmon_download
PARAMS ((char *buffer
, int length
));
146 static void pmon_load_fast
PARAMS ((char *file
));
148 static void mips_load
PARAMS ((char *file
, int from_tty
));
150 static int mips_make_srec
PARAMS ((char *buffer
, int type
, CORE_ADDR memaddr
,
151 unsigned char *myaddr
, int len
));
153 static int set_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
154 enum break_type type
));
156 static int clear_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
157 enum break_type type
));
159 static int common_breakpoint
PARAMS ((int set
, CORE_ADDR addr
, int len
,
160 enum break_type type
));
162 /* Forward declarations. */
163 extern struct target_ops mips_ops
;
164 extern struct target_ops pmon_ops
;
165 extern struct target_ops ddb_ops
;
167 /* The MIPS remote debugging interface is built on top of a simple
168 packet protocol. Each packet is organized as follows:
170 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
171 may not appear anywhere else in the packet. Any time a SYN is
172 seen, a new packet should be assumed to have begun.
175 This byte contains the upper five bits of the logical length
176 of the data section, plus a single bit indicating whether this
177 is a data packet or an acknowledgement. The documentation
178 indicates that this bit is 1 for a data packet, but the actual
179 board uses 1 for an acknowledgement. The value of the byte is
180 0x40 + (ack ? 0x20 : 0) + (len >> 6)
181 (we always have 0 <= len < 1024). Acknowledgement packets do
182 not carry data, and must have a data length of 0.
184 LEN1 This byte contains the lower six bits of the logical length of
185 the data section. The value is
188 SEQ This byte contains the six bit sequence number of the packet.
191 An acknowlegment packet contains the sequence number of the
192 packet being acknowledged plus 1 modulo 64. Data packets are
193 transmitted in sequence. There may only be one outstanding
194 unacknowledged data packet at a time. The sequence numbers
195 are independent in each direction. If an acknowledgement for
196 the previous packet is received (i.e., an acknowledgement with
197 the sequence number of the packet just sent) the packet just
198 sent should be retransmitted. If no acknowledgement is
199 received within a timeout period, the packet should be
200 retransmitted. This has an unfortunate failure condition on a
201 high-latency line, as a delayed acknowledgement may lead to an
202 endless series of duplicate packets.
204 DATA The actual data bytes follow. The following characters are
205 escaped inline with DLE (ASCII 020, or ^P):
211 The additional DLE characters are not counted in the logical
212 length stored in the TYPE_LEN and LEN1 bytes.
217 These bytes contain an 18 bit checksum of the complete
218 contents of the packet excluding the SEQ byte and the
219 CSUM[123] bytes. The checksum is simply the twos complement
220 addition of all the bytes treated as unsigned characters. The
221 values of the checksum bytes are:
222 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
223 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
224 CSUM3: 0x40 + (cksum & 0x3f)
226 It happens that the MIPS remote debugging protocol always
227 communicates with ASCII strings. Because of this, this
228 implementation doesn't bother to handle the DLE quoting mechanism,
229 since it will never be required. */
233 /* The SYN character which starts each packet. */
236 /* The 0x40 used to offset each packet (this value ensures that all of
237 the header and trailer bytes, other than SYN, are printable ASCII
239 #define HDR_OFFSET 0x40
241 /* The indices of the bytes in the packet header. */
242 #define HDR_INDX_SYN 0
243 #define HDR_INDX_TYPE_LEN 1
244 #define HDR_INDX_LEN1 2
245 #define HDR_INDX_SEQ 3
248 /* The data/ack bit in the TYPE_LEN header byte. */
249 #define TYPE_LEN_DA_BIT 0x20
250 #define TYPE_LEN_DATA 0
251 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
253 /* How to compute the header bytes. */
254 #define HDR_SET_SYN(data, len, seq) (SYN)
255 #define HDR_SET_TYPE_LEN(data, len, seq) \
257 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
258 + (((len) >> 6) & 0x1f))
259 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
260 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
262 /* Check that a header byte is reasonable. */
263 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
265 /* Get data from the header. These macros evaluate their argument
267 #define HDR_IS_DATA(hdr) \
268 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
269 #define HDR_GET_LEN(hdr) \
270 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
271 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
273 /* The maximum data length. */
274 #define DATA_MAXLEN 1023
276 /* The trailer offset. */
277 #define TRLR_OFFSET HDR_OFFSET
279 /* The indices of the bytes in the packet trailer. */
280 #define TRLR_INDX_CSUM1 0
281 #define TRLR_INDX_CSUM2 1
282 #define TRLR_INDX_CSUM3 2
283 #define TRLR_LENGTH 3
285 /* How to compute the trailer bytes. */
286 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
287 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
288 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
290 /* Check that a trailer byte is reasonable. */
291 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
293 /* Get data from the trailer. This evaluates its argument multiple
295 #define TRLR_GET_CKSUM(trlr) \
296 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
297 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
298 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
300 /* The sequence number modulos. */
301 #define SEQ_MODULOS (64)
303 /* PMON commands to load from the serial port or UDP socket. */
304 #define LOAD_CMD "load -b -s tty0\r"
305 #define LOAD_CMD_UDP "load -b -s udp\r"
307 /* The target vectors for the four different remote MIPS targets.
308 These are initialized with code in _initialize_remote_mips instead
309 of static initializers, to make it easier to extend the target_ops
311 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
313 enum mips_monitor_type
315 /* IDT/SIM monitor being used: */
317 /* PMON monitor being used: */
318 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
319 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
320 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
321 /* Last and unused value, for sizing vectors, etc. */
324 static enum mips_monitor_type mips_monitor
= MON_LAST
;
326 /* The monitor prompt text. If the user sets the PMON prompt
327 to some new value, the GDB `set monitor-prompt' command must also
328 be used to inform GDB about the expected prompt. Otherwise, GDB
329 will not be able to connect to PMON in mips_initialize().
330 If the `set monitor-prompt' command is not used, the expected
331 default prompt will be set according the target:
338 static char *mips_monitor_prompt
;
340 /* Set to 1 if the target is open. */
341 static int mips_is_open
;
343 /* Currently active target description (if mips_is_open == 1) */
344 static struct target_ops
*current_ops
;
346 /* Set to 1 while the connection is being initialized. */
347 static int mips_initializing
;
349 /* Set to 1 while the connection is being brought down. */
350 static int mips_exiting
;
352 /* The next sequence number to send. */
353 static unsigned int mips_send_seq
;
355 /* The next sequence number we expect to receive. */
356 static unsigned int mips_receive_seq
;
358 /* The time to wait before retransmitting a packet, in seconds. */
359 static int mips_retransmit_wait
= 3;
361 /* The number of times to try retransmitting a packet before giving up. */
362 static int mips_send_retries
= 10;
364 /* The number of garbage characters to accept when looking for an
365 SYN for the next packet. */
366 static int mips_syn_garbage
= 1050;
368 /* The time to wait for a packet, in seconds. */
369 static int mips_receive_wait
= 5;
371 /* Set if we have sent a packet to the board but have not yet received
373 static int mips_need_reply
= 0;
375 /* Handle used to access serial I/O stream. */
376 static serial_t mips_desc
;
378 /* UDP handle used to download files to target. */
379 static serial_t udp_desc
;
380 static int udp_in_use
;
382 /* TFTP filename used to download files to DDB board, in the form
384 static char *tftp_name
; /* host:filename */
385 static char *tftp_localname
; /* filename portion of above */
386 static int tftp_in_use
;
387 static FILE *tftp_file
;
389 /* Counts the number of times the user tried to interrupt the target (usually
391 static int interrupt_count
;
393 /* If non-zero, means that the target is running. */
394 static int mips_wait_flag
= 0;
396 /* If non-zero, monitor supports breakpoint commands. */
397 static monitor_supports_breakpoints
= 0;
399 /* Data cache header. */
401 #if 0 /* not used (yet?) */
402 static DCACHE
*mips_dcache
;
405 /* Non-zero means that we've just hit a read or write watchpoint */
406 static int hit_watchpoint
;
408 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
409 The table is indexed by a breakpoint number, which is an integer
410 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
412 #define MAX_LSI_BREAKPOINTS 256
413 struct lsi_breakpoint_info
415 enum break_type type
; /* type of breakpoint */
416 CORE_ADDR addr
; /* address of breakpoint */
417 int len
; /* length of region being watched */
418 unsigned long value
; /* value to watch */
420 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
422 /* Error/warning codes returned by LSI PMON for breakpoint commands.
423 Warning values may be ORed together; error values may not. */
424 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
425 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
426 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
427 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
429 #define E_ERR 0x200 /* This bit is set if the error code is an error */
430 #define E_BPT 0x200 /* error: No such breakpoint number */
431 #define E_RGE 0x201 /* error: Range is not supported */
432 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
433 #define E_OUT 0x203 /* error: Out of hardware resources */
434 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
438 int code
; /* error code */
439 char *string
; /* string associated with this code */
442 struct lsi_error lsi_warning_table
[] =
444 {W_MSK
, "Range feature is supported via mask"},
445 {W_VAL
, "Value check is not supported in hardware"},
446 {W_QAL
, "Requested qualifiers are not supported in hardware"},
450 struct lsi_error lsi_error_table
[] =
452 {E_BPT
, "No such breakpoint number"},
453 {E_RGE
, "Range is not supported"},
454 {E_QAL
, "The requested qualifiers can not be used"},
455 {E_OUT
, "Out of hardware resources"},
456 {E_NON
, "Hardware breakpoint not supported"},
460 /* Set to 1 with the 'set monitor-warnings' command to enable printing
461 of warnings returned by PMON when hardware breakpoints are used. */
462 static int monitor_warnings
;
469 SERIAL_CLOSE (mips_desc
);
473 SERIAL_CLOSE (udp_desc
);
479 /* Handle low-level error that we can't recover from. Note that just
480 error()ing out from target_wait or some such low-level place will cause
481 all hell to break loose--the rest of GDB will tend to get left in an
482 inconsistent state. */
485 mips_error (char *string
,...)
489 va_start (args
, string
);
491 target_terminal_ours ();
492 wrap_here (""); /* Force out any buffered output */
493 gdb_flush (gdb_stdout
);
495 fprintf_filtered (gdb_stderr
, error_pre_print
);
496 vfprintf_filtered (gdb_stderr
, string
, args
);
497 fprintf_filtered (gdb_stderr
, "\n");
499 gdb_flush (gdb_stderr
);
501 /* Clean up in such a way that mips_close won't try to talk to the
502 board (it almost surely won't work since we weren't able to talk to
506 printf_unfiltered ("Ending remote MIPS debugging.\n");
507 target_mourn_inferior ();
509 return_to_top_level (RETURN_ERROR
);
512 /* putc_readable - print a character, displaying non-printable chars in
513 ^x notation or in hex. */
516 fputc_readable (ch
, file
)
518 struct gdb_file
*file
;
521 fputc_unfiltered ('\n', file
);
523 fprintf_unfiltered (file
, "\\r");
524 else if (ch
< 0x20) /* ASCII control character */
525 fprintf_unfiltered (file
, "^%c", ch
+ '@');
526 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
527 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
529 fputc_unfiltered (ch
, file
);
533 /* puts_readable - print a string, displaying non-printable chars in
534 ^x notation or in hex. */
537 fputs_readable (string
, file
)
539 struct gdb_file
*file
;
543 while ((c
= *string
++) != '\0')
544 fputc_readable (c
, file
);
548 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
549 timed out. TIMEOUT specifies timeout value in seconds.
553 mips_expect_timeout (string
, timeout
)
561 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
562 fputs_readable (string
, gdb_stdlog
);
563 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
571 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
572 were waiting for the mips_monitor_prompt... */
574 c
= SERIAL_READCHAR (mips_desc
, timeout
);
576 if (c
== SERIAL_TIMEOUT
)
579 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
584 fputc_readable (c
, gdb_stdlog
);
592 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
605 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
606 timed out. The timeout value is hard-coded to 2 seconds. Use
607 mips_expect_timeout if a different timeout value is needed.
614 return mips_expect_timeout (string
, 2);
617 /* Read the required number of characters into the given buffer (which
618 is assumed to be large enough). The only failure is a timeout. */
620 mips_getstring (string
, n
)
630 c
= SERIAL_READCHAR (mips_desc
, 2);
632 if (c
== SERIAL_TIMEOUT
)
634 fprintf_unfiltered (gdb_stderr
,
635 "Failed to read %d characters from target (TIMEOUT)\n", n
);
646 /* Read a character from the remote, aborting on error. Returns
647 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
648 returns). FIXME: If we see the string mips_monitor_prompt from
649 the board, then we are debugging on the main console port, and we
650 have somehow dropped out of remote debugging mode. In this case,
651 we automatically go back in to remote debugging mode. This is a
652 hack, put in because I can't find any way for a program running on
653 the remote board to terminate without also ending remote debugging
654 mode. I assume users won't have any trouble with this; for one
655 thing, the IDT documentation generally assumes that the remote
656 debugging port is not the console port. This is, however, very
657 convenient for DejaGnu when you only have one connected serial
661 mips_readchar (timeout
)
665 static int state
= 0;
666 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
672 if (i
== -1 && watchdog
> 0)
676 if (state
== mips_monitor_prompt_len
)
678 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
680 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
682 target_mourn_inferior ();
683 error ("Watchdog has expired. Target detached.\n");
686 if (ch
== SERIAL_EOF
)
687 mips_error ("End of file from remote");
688 if (ch
== SERIAL_ERROR
)
689 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
690 if (remote_debug
> 1)
692 /* Don't use _filtered; we can't deal with a QUIT out of
693 target_wait, and I think this might be called from there. */
694 if (ch
!= SERIAL_TIMEOUT
)
695 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
697 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
700 /* If we have seen mips_monitor_prompt and we either time out, or
701 we see a @ (which was echoed from a packet we sent), reset the
702 board as described above. The first character in a packet after
703 the SYN (which is not echoed) is always an @ unless the packet is
704 more than 64 characters long, which ours never are. */
705 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
706 && state
== mips_monitor_prompt_len
707 && !mips_initializing
710 if (remote_debug
> 0)
711 /* Don't use _filtered; we can't deal with a QUIT out of
712 target_wait, and I think this might be called from there. */
713 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
720 /* At this point, about the only thing we can do is abort the command
721 in progress and get back to command level as quickly as possible. */
723 error ("Remote board reset, debug protocol re-initialized.");
726 if (ch
== mips_monitor_prompt
[state
])
734 /* Get a packet header, putting the data in the supplied buffer.
735 PGARBAGE is a pointer to the number of garbage characters received
736 so far. CH is the last character received. Returns 0 for success,
737 or -1 for timeout. */
740 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
750 /* Wait for a SYN. mips_syn_garbage is intended to prevent
751 sitting here indefinitely if the board sends us one garbage
752 character per second. ch may already have a value from the
753 last time through the loop. */
756 ch
= mips_readchar (timeout
);
757 if (ch
== SERIAL_TIMEOUT
)
761 /* Printing the character here lets the user of gdb see
762 what the program is outputting, if the debugging is
763 being done on the console port. Don't use _filtered;
764 we can't deal with a QUIT out of target_wait. */
765 if (!mips_initializing
|| remote_debug
> 0)
767 fputc_readable (ch
, gdb_stdlog
);
768 gdb_flush (gdb_stdlog
);
772 if (mips_syn_garbage
> 0
773 && *pgarbage
> mips_syn_garbage
)
774 mips_error ("Debug protocol failure: more than %d characters before a sync.",
779 /* Get the packet header following the SYN. */
780 for (i
= 1; i
< HDR_LENGTH
; i
++)
782 ch
= mips_readchar (timeout
);
783 if (ch
== SERIAL_TIMEOUT
)
785 /* Make sure this is a header byte. */
786 if (ch
== SYN
|| !HDR_CHECK (ch
))
792 /* If we got the complete header, we can return. Otherwise we
793 loop around and keep looking for SYN. */
799 /* Get a packet header, putting the data in the supplied buffer.
800 PGARBAGE is a pointer to the number of garbage characters received
801 so far. The last character read is returned in *PCH. Returns 0
802 for success, -1 for timeout, -2 for error. */
805 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
814 for (i
= 0; i
< TRLR_LENGTH
; i
++)
816 ch
= mips_readchar (timeout
);
818 if (ch
== SERIAL_TIMEOUT
)
820 if (!TRLR_CHECK (ch
))
827 /* Get the checksum of a packet. HDR points to the packet header.
828 DATA points to the packet data. LEN is the length of DATA. */
831 mips_cksum (hdr
, data
, len
)
832 const unsigned char *hdr
;
833 const unsigned char *data
;
836 register const unsigned char *p
;
842 /* The initial SYN is not included in the checksum. */
856 /* Send a packet containing the given ASCII string. */
859 mips_send_packet (s
, get_ack
)
863 /* unsigned */ int len
;
864 unsigned char *packet
;
869 if (len
> DATA_MAXLEN
)
870 mips_error ("MIPS protocol data packet too long: %s", s
);
872 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
874 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
875 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
876 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
877 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
879 memcpy (packet
+ HDR_LENGTH
, s
, len
);
881 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
882 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
883 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
884 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
886 /* Increment the sequence number. This will set mips_send_seq to
887 the sequence number we expect in the acknowledgement. */
888 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
890 /* We can only have one outstanding data packet, so we just wait for
891 the acknowledgement here. Keep retransmitting the packet until
892 we get one, or until we've tried too many times. */
893 for (try = 0; try < mips_send_retries
; try++)
898 if (remote_debug
> 0)
900 /* Don't use _filtered; we can't deal with a QUIT out of
901 target_wait, and I think this might be called from there. */
902 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
903 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
906 if (SERIAL_WRITE (mips_desc
, packet
,
907 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
908 mips_error ("write to target failed: %s", safe_strerror (errno
));
917 unsigned char hdr
[HDR_LENGTH
+ 1];
918 unsigned char trlr
[TRLR_LENGTH
+ 1];
922 /* Get the packet header. If we time out, resend the data
924 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
930 /* If we get a data packet, assume it is a duplicate and
931 ignore it. FIXME: If the acknowledgement is lost, this
932 data packet may be the packet the remote sends after the
934 if (HDR_IS_DATA (hdr
))
938 /* Ignore any errors raised whilst attempting to ignore
941 len
= HDR_GET_LEN (hdr
);
943 for (i
= 0; i
< len
; i
++)
947 rch
= mips_readchar (2);
953 if (rch
== SERIAL_TIMEOUT
)
955 /* ignore the character */
959 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
961 /* We don't bother checking the checksum, or providing an
962 ACK to the packet. */
966 /* If the length is not 0, this is a garbled packet. */
967 if (HDR_GET_LEN (hdr
) != 0)
970 /* Get the packet trailer. */
971 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
972 mips_retransmit_wait
);
974 /* If we timed out, resend the data packet. */
978 /* If we got a bad character, reread the header. */
982 /* If the checksum does not match the trailer checksum, this
983 is a bad packet; ignore it. */
984 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
985 != TRLR_GET_CKSUM (trlr
))
988 if (remote_debug
> 0)
990 hdr
[HDR_LENGTH
] = '\0';
991 trlr
[TRLR_LENGTH
] = '\0';
992 /* Don't use _filtered; we can't deal with a QUIT out of
993 target_wait, and I think this might be called from there. */
994 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
995 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
998 /* If this ack is for the current packet, we're done. */
999 seq
= HDR_GET_SEQ (hdr
);
1000 if (seq
== mips_send_seq
)
1003 /* If this ack is for the last packet, resend the current
1005 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1008 /* Otherwise this is a bad ack; ignore it. Increment the
1009 garbage count to ensure that we do not stay in this loop
1015 mips_error ("Remote did not acknowledge packet");
1018 /* Receive and acknowledge a packet, returning the data in BUFF (which
1019 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1020 implies that only the sender retransmits packets, so this code just
1021 waits silently for a packet. It returns the length of the received
1022 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1023 don't print an error message and return -1. */
1026 mips_receive_packet (buff
, throw_error
, timeout
)
1034 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1041 unsigned char hdr
[HDR_LENGTH
];
1042 unsigned char trlr
[TRLR_LENGTH
];
1046 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1049 mips_error ("Timed out waiting for remote packet");
1056 /* An acknowledgement is probably a duplicate; ignore it. */
1057 if (!HDR_IS_DATA (hdr
))
1059 len
= HDR_GET_LEN (hdr
);
1060 /* Check if the length is valid for an ACK, we may aswell
1061 try and read the remainder of the packet: */
1064 /* Ignore the error condition, since we are going to
1065 ignore the packet anyway. */
1066 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1068 /* Don't use _filtered; we can't deal with a QUIT out of
1069 target_wait, and I think this might be called from there. */
1070 if (remote_debug
> 0)
1071 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1075 len
= HDR_GET_LEN (hdr
);
1076 for (i
= 0; i
< len
; i
++)
1080 rch
= mips_readchar (timeout
);
1086 if (rch
== SERIAL_TIMEOUT
)
1089 mips_error ("Timed out waiting for remote packet");
1098 /* Don't use _filtered; we can't deal with a QUIT out of
1099 target_wait, and I think this might be called from there. */
1100 if (remote_debug
> 0)
1101 fprintf_unfiltered (gdb_stdlog
,
1102 "Got new SYN after %d chars (wanted %d)\n",
1107 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1111 mips_error ("Timed out waiting for packet");
1117 /* Don't use _filtered; we can't deal with a QUIT out of
1118 target_wait, and I think this might be called from there. */
1119 if (remote_debug
> 0)
1120 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1124 /* If this is the wrong sequence number, ignore it. */
1125 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1127 /* Don't use _filtered; we can't deal with a QUIT out of
1128 target_wait, and I think this might be called from there. */
1129 if (remote_debug
> 0)
1130 fprintf_unfiltered (gdb_stdlog
,
1131 "Ignoring sequence number %d (want %d)\n",
1132 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1136 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1139 if (remote_debug
> 0)
1140 /* Don't use _filtered; we can't deal with a QUIT out of
1141 target_wait, and I think this might be called from there. */
1142 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1143 mips_cksum (hdr
, buff
, len
),
1144 TRLR_GET_CKSUM (trlr
));
1146 /* The checksum failed. Send an acknowledgement for the
1147 previous packet to tell the remote to resend the packet. */
1148 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1149 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1150 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1151 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1153 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1155 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1156 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1157 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1159 if (remote_debug
> 0)
1161 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1162 /* Don't use _filtered; we can't deal with a QUIT out of
1163 target_wait, and I think this might be called from there. */
1164 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1168 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1171 mips_error ("write to target failed: %s", safe_strerror (errno
));
1177 if (remote_debug
> 0)
1180 /* Don't use _filtered; we can't deal with a QUIT out of
1181 target_wait, and I think this might be called from there. */
1182 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1185 /* We got the packet. Send an acknowledgement. */
1186 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1188 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1189 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1190 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1191 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1193 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1195 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1196 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1197 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1199 if (remote_debug
> 0)
1201 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1202 /* Don't use _filtered; we can't deal with a QUIT out of
1203 target_wait, and I think this might be called from there. */
1204 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1208 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1211 mips_error ("write to target failed: %s", safe_strerror (errno
));
1219 /* Optionally send a request to the remote system and optionally wait
1220 for the reply. This implements the remote debugging protocol,
1221 which is built on top of the packet protocol defined above. Each
1222 request has an ADDR argument and a DATA argument. The following
1223 requests are defined:
1225 \0 don't send a request; just wait for a reply
1226 i read word from instruction space at ADDR
1227 d read word from data space at ADDR
1228 I write DATA to instruction space at ADDR
1229 D write DATA to data space at ADDR
1230 r read register number ADDR
1231 R set register number ADDR to value DATA
1232 c continue execution (if ADDR != 1, set pc to ADDR)
1233 s single step (if ADDR != 1, set pc to ADDR)
1235 The read requests return the value requested. The write requests
1236 return the previous value in the changed location. The execution
1237 requests return a UNIX wait value (the approximate signal which
1238 caused execution to stop is in the upper eight bits).
1240 If PERR is not NULL, this function waits for a reply. If an error
1241 occurs, it sets *PERR to 1 and sets errno according to what the
1242 target board reports. */
1245 mips_request (cmd
, addr
, data
, perr
, timeout
, buff
)
1253 char myBuff
[DATA_MAXLEN
+ 1];
1258 unsigned long rresponse
;
1260 if (buff
== (char *) NULL
)
1265 if (mips_need_reply
)
1266 internal_error ("mips_request: Trying to send command before reply");
1267 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1268 mips_send_packet (buff
, 1);
1269 mips_need_reply
= 1;
1272 if (perr
== (int *) NULL
)
1275 if (!mips_need_reply
)
1276 internal_error ("mips_request: Trying to get reply before command");
1278 mips_need_reply
= 0;
1280 len
= mips_receive_packet (buff
, 1, timeout
);
1283 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1284 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1285 || (cmd
!= '\0' && rcmd
!= cmd
))
1286 mips_error ("Bad response from remote board");
1292 /* FIXME: This will returns MIPS errno numbers, which may or may
1293 not be the same as errno values used on other systems. If
1294 they stick to common errno values, they will be the same, but
1295 if they don't, they must be translated. */
1306 mips_initialize_cleanups (arg
)
1309 mips_initializing
= 0;
1313 mips_exit_cleanups (arg
)
1320 mips_send_command (cmd
, prompt
)
1324 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1328 mips_expect (mips_monitor_prompt
);
1331 /* Enter remote (dbx) debug mode: */
1335 /* Reset the sequence numbers, ready for the new debug sequence: */
1337 mips_receive_seq
= 0;
1339 if (mips_monitor
!= MON_IDT
)
1340 mips_send_command ("debug\r", 0);
1341 else /* assume IDT monitor by default */
1342 mips_send_command ("db tty0\r", 0);
1345 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1347 /* We don't need to absorb any spurious characters here, since the
1348 mips_receive_header will eat up a reasonable number of characters
1349 whilst looking for the SYN, however this avoids the "garbage"
1350 being displayed to the user. */
1351 if (mips_monitor
!= MON_IDT
)
1355 char buff
[DATA_MAXLEN
+ 1];
1356 if (mips_receive_packet (buff
, 1, 3) < 0)
1357 mips_error ("Failed to initialize (didn't receive packet).");
1361 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1366 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1370 if (mips_monitor
!= MON_IDT
)
1372 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1373 so we do not get a reply to this command: */
1374 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL
,
1375 mips_receive_wait
, NULL
);
1376 mips_need_reply
= 0;
1377 if (!mips_expect (" break!"))
1381 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err
,
1382 mips_receive_wait
, NULL
);
1384 if (!mips_expect (mips_monitor_prompt
))
1387 do_cleanups (old_cleanups
);
1392 /* Initialize a new connection to the MIPS board, and make sure we are
1393 really connected. */
1399 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1402 /* What is this code doing here? I don't see any way it can happen, and
1403 it might mean mips_initializing didn't get cleared properly.
1404 So I'll make it a warning. */
1406 if (mips_initializing
)
1408 warning ("internal error: mips_initialize called twice");
1413 mips_initializing
= 1;
1415 /* At this point, the packit protocol isn't responding. We'll try getting
1416 into the monitor, and restarting the protocol. */
1418 /* Force the system into the monitor. After this we *should* be at
1419 the mips_monitor_prompt. */
1420 if (mips_monitor
!= MON_IDT
)
1421 j
= 0; /* start by checking if we are already at the prompt */
1423 j
= 1; /* start by sending a break */
1428 case 0: /* First, try sending a CR */
1429 SERIAL_FLUSH_INPUT (mips_desc
);
1430 SERIAL_WRITE (mips_desc
, "\r", 1);
1432 case 1: /* First, try sending a break */
1433 SERIAL_SEND_BREAK (mips_desc
);
1435 case 2: /* Then, try a ^C */
1436 SERIAL_WRITE (mips_desc
, "\003", 1);
1438 case 3: /* Then, try escaping from download */
1440 if (mips_monitor
!= MON_IDT
)
1444 /* We shouldn't need to send multiple termination
1445 sequences, since the target performs line (or
1446 block) reads, and then processes those
1447 packets. In-case we were downloading a large packet
1448 we flush the output buffer before inserting a
1449 termination sequence. */
1450 SERIAL_FLUSH_OUTPUT (mips_desc
);
1451 sprintf (tbuff
, "\r/E/E\r");
1452 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1459 /* We are possibly in binary download mode, having
1460 aborted in the middle of an S-record. ^C won't
1461 work because of binary mode. The only reliable way
1462 out is to send enough termination packets (8 bytes)
1463 to fill up and then overflow the largest size
1464 S-record (255 bytes in this case). This amounts to
1468 mips_make_srec (srec
, '7', 0, NULL
, 0);
1470 for (i
= 1; i
<= 33; i
++)
1472 SERIAL_WRITE (mips_desc
, srec
, 8);
1474 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1475 break; /* Break immediatly if we get something from
1482 mips_error ("Failed to initialize.");
1485 if (mips_expect (mips_monitor_prompt
))
1489 if (mips_monitor
!= MON_IDT
)
1491 /* Sometimes PMON ignores the first few characters in the first
1492 command sent after a load. Sending a blank command gets
1494 mips_send_command ("\r", -1);
1496 /* Ensure the correct target state: */
1497 if (mips_monitor
!= MON_LSI
)
1498 mips_send_command ("set regsize 64\r", -1);
1499 mips_send_command ("set hostport tty0\r", -1);
1500 mips_send_command ("set brkcmd \"\"\r", -1);
1501 /* Delete all the current breakpoints: */
1502 mips_send_command ("db *\r", -1);
1503 /* NOTE: PMON does not have breakpoint support through the
1504 "debug" mode, only at the monitor command-line. */
1507 mips_enter_debug ();
1509 /* Clear all breakpoints: */
1510 if ((mips_monitor
== MON_IDT
1511 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1512 || mips_monitor
== MON_LSI
)
1513 monitor_supports_breakpoints
= 1;
1515 monitor_supports_breakpoints
= 0;
1517 do_cleanups (old_cleanups
);
1519 /* If this doesn't call error, we have connected; we don't care if
1520 the request itself succeeds or fails. */
1522 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err
,
1523 mips_receive_wait
, NULL
);
1524 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1525 select_frame (get_current_frame (), 0);
1528 /* Open a connection to the remote board. */
1530 common_open (ops
, name
, from_tty
, new_monitor
, new_monitor_prompt
)
1531 struct target_ops
*ops
;
1534 enum mips_monitor_type new_monitor
;
1535 char *new_monitor_prompt
;
1538 char *serial_port_name
;
1539 char *remote_name
= 0;
1540 char *local_name
= 0;
1545 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1546 device is attached to the target board (e.g., /dev/ttya).\n"
1547 "If you want to use TFTP to download to the board, specify the name of a\n"
1548 "temporary file to be used by GDB for downloads as the second argument.\n"
1549 "This filename must be in the form host:filename, where host is the name\n"
1550 "of the host running the TFTP server, and the file must be readable by the\n"
1551 "world. If the local name of the temporary file differs from the name as\n"
1552 "seen from the board via TFTP, specify that name as the third parameter.\n");
1554 /* Parse the serial port name, the optional TFTP name, and the
1555 optional local TFTP name. */
1556 if ((argv
= buildargv (name
)) == NULL
)
1558 make_cleanup_freeargv (argv
);
1560 serial_port_name
= strsave (argv
[0]);
1561 if (argv
[1]) /* remote TFTP name specified? */
1563 remote_name
= argv
[1];
1564 if (argv
[2]) /* local TFTP filename specified? */
1565 local_name
= argv
[2];
1568 target_preopen (from_tty
);
1571 unpush_target (current_ops
);
1573 /* Open and initialize the serial port. */
1574 mips_desc
= SERIAL_OPEN (serial_port_name
);
1575 if (mips_desc
== (serial_t
) NULL
)
1576 perror_with_name (serial_port_name
);
1578 if (baud_rate
!= -1)
1580 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1582 SERIAL_CLOSE (mips_desc
);
1583 perror_with_name (serial_port_name
);
1587 SERIAL_RAW (mips_desc
);
1589 /* Open and initialize the optional download port. If it is in the form
1590 hostname#portnumber, it's a UDP socket. If it is in the form
1591 hostname:filename, assume it's the TFTP filename that must be
1592 passed to the DDB board to tell it where to get the load file. */
1595 if (strchr (remote_name
, '#'))
1597 udp_desc
= SERIAL_OPEN (remote_name
);
1599 perror_with_name ("Unable to open UDP port");
1604 /* Save the remote and local names of the TFTP temp file. If
1605 the user didn't specify a local name, assume it's the same
1606 as the part of the remote name after the "host:". */
1610 free (tftp_localname
);
1611 if (local_name
== NULL
)
1612 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1613 local_name
++; /* skip over the colon */
1614 if (local_name
== NULL
)
1615 local_name
= remote_name
; /* local name same as remote name */
1616 tftp_name
= strsave (remote_name
);
1617 tftp_localname
= strsave (local_name
);
1625 /* Reset the expected monitor prompt if it's never been set before. */
1626 if (mips_monitor_prompt
== NULL
)
1627 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1628 mips_monitor
= new_monitor
;
1633 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1635 /* Switch to using remote target now. */
1638 /* FIXME: Should we call start_remote here? */
1640 /* Try to figure out the processor model if possible. */
1641 ptype
= mips_read_processor_type ();
1643 mips_set_processor_type_command (strsave (ptype
), 0);
1645 /* This is really the job of start_remote however, that makes an assumption
1646 that the target is about to print out a status message of some sort. That
1647 doesn't happen here (in fact, it may not be possible to get the monitor to
1648 send the appropriate packet). */
1650 flush_cached_frames ();
1651 registers_changed ();
1652 stop_pc
= read_pc ();
1653 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1654 select_frame (get_current_frame (), 0);
1655 print_stack_frame (selected_frame
, -1, 1);
1656 free (serial_port_name
);
1660 mips_open (name
, from_tty
)
1664 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, TARGET_MONITOR_PROMPT
);
1668 pmon_open (name
, from_tty
)
1672 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1676 ddb_open (name
, from_tty
)
1680 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1684 lsi_open (name
, from_tty
)
1690 /* Clear the LSI breakpoint table. */
1691 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1692 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1694 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1697 /* Close a connection to the remote board. */
1700 mips_close (quitting
)
1705 /* Get the board out of remote debugging mode. */
1706 (void) mips_exit_debug ();
1712 /* Detach from the remote board. */
1715 mips_detach (args
, from_tty
)
1720 error ("Argument given to \"detach\" when remotely debugging.");
1727 printf_unfiltered ("Ending remote MIPS debugging.\n");
1730 /* Tell the target board to resume. This does not wait for a reply
1731 from the board, except in the case of single-stepping on LSI boards,
1732 where PMON does return a reply. */
1735 mips_resume (pid
, step
, siggnal
)
1737 enum target_signal siggnal
;
1741 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1742 a single step, so we wait for that. */
1743 mips_request (step
? 's' : 'c',
1745 (unsigned int) siggnal
,
1746 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1747 mips_receive_wait
, NULL
);
1750 /* Return the signal corresponding to SIG, where SIG is the number which
1751 the MIPS protocol uses for the signal. */
1753 mips_signal_from_protocol (sig
)
1756 /* We allow a few more signals than the IDT board actually returns, on
1757 the theory that there is at least *some* hope that perhaps the numbering
1758 for these signals is widely agreed upon. */
1761 return TARGET_SIGNAL_UNKNOWN
;
1763 /* Don't want to use target_signal_from_host because we are converting
1764 from MIPS signal numbers, not host ones. Our internal numbers
1765 match the MIPS numbers for the signals the board can return, which
1766 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1767 return (enum target_signal
) sig
;
1770 /* Wait until the remote stops, and return a wait status. */
1773 mips_wait (pid
, status
)
1775 struct target_waitstatus
*status
;
1779 char buff
[DATA_MAXLEN
];
1785 interrupt_count
= 0;
1788 /* If we have not sent a single step or continue command, then the
1789 board is waiting for us to do something. Return a status
1790 indicating that it is stopped. */
1791 if (!mips_need_reply
)
1793 status
->kind
= TARGET_WAITKIND_STOPPED
;
1794 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1798 /* No timeout; we sit here as long as the program continues to execute. */
1800 rstatus
= mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err
, -1,
1804 mips_error ("Remote failure: %s", safe_strerror (errno
));
1806 /* On returning from a continue, the PMON monitor seems to start
1807 echoing back the messages we send prior to sending back the
1808 ACK. The code can cope with this, but to try and avoid the
1809 unnecessary serial traffic, and "spurious" characters displayed
1810 to the user, we cheat and reset the debug protocol. The problems
1811 seems to be caused by a check on the number of arguments, and the
1812 command length, within the monitor causing it to echo the command
1814 if (mips_monitor
== MON_PMON
)
1817 mips_enter_debug ();
1820 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1822 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1823 &rpc
, &rfp
, &rsp
, flags
);
1826 char buf
[MAX_REGISTER_RAW_SIZE
];
1828 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1829 supply_register (PC_REGNUM
, buf
);
1831 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1832 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1834 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1835 supply_register (SP_REGNUM
, buf
);
1837 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1838 supply_register (FP_REGNUM
, buf
);
1844 for (i
= 0; i
<= 2; i
++)
1845 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1847 else if (flags
[i
] == '\000')
1852 if (strcmp (target_shortname
, "lsi") == 0)
1855 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1856 Right now, PMON doesn't give us enough information to determine which
1857 breakpoint we hit. So we have to look up the PC in our own table
1858 of breakpoints, and if found, assume it's just a normal instruction
1859 fetch breakpoint, not a data watchpoint. FIXME when PMON
1860 provides some way to tell us what type of breakpoint it is. */
1862 CORE_ADDR pc
= read_pc ();
1865 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1867 if (lsi_breakpoints
[i
].addr
== pc
1868 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1875 /* If a data breakpoint was hit, PMON returns the following packet:
1877 The return packet from an ordinary breakpoint doesn't have the
1878 extra 0x01 field tacked onto the end. */
1879 if (nfields
== 1 && rpc
== 1)
1884 /* NOTE: The following (sig) numbers are defined by PMON:
1885 SPP_SIGTRAP 5 breakpoint
1893 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1894 and so on, because the constants we want here are determined by the
1895 MIPS protocol and have nothing to do with what host we are running on. */
1896 if ((rstatus
& 0xff) == 0)
1898 status
->kind
= TARGET_WAITKIND_EXITED
;
1899 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1901 else if ((rstatus
& 0xff) == 0x7f)
1903 status
->kind
= TARGET_WAITKIND_STOPPED
;
1904 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1906 /* If the stop PC is in the _exit function, assume
1907 we hit the 'break 0x3ff' instruction in _exit, so this
1908 is not a normal breakpoint. */
1909 if (strcmp (target_shortname
, "lsi") == 0)
1912 CORE_ADDR func_start
;
1913 CORE_ADDR pc
= read_pc ();
1915 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1916 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1917 && func_start
== pc
)
1918 status
->kind
= TARGET_WAITKIND_EXITED
;
1923 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1924 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1930 /* We have to map between the register numbers used by gdb and the
1931 register numbers used by the debugging protocol. This function
1932 assumes that we are using tm-mips.h. */
1934 #define REGNO_OFFSET 96
1937 mips_map_regno (regno
)
1942 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1943 return regno
- FP0_REGNUM
+ 32;
1947 return REGNO_OFFSET
+ 0;
1949 return REGNO_OFFSET
+ 1;
1951 return REGNO_OFFSET
+ 2;
1953 return REGNO_OFFSET
+ 3;
1955 return REGNO_OFFSET
+ 4;
1957 return REGNO_OFFSET
+ 5;
1959 /* FIXME: Is there a way to get the status register? */
1964 /* Fetch the remote registers. */
1967 mips_fetch_registers (regno
)
1970 unsigned LONGEST val
;
1975 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1976 mips_fetch_registers (regno
);
1980 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1981 /* FP_REGNUM on the mips is a hack which is just supposed to read
1982 zero (see also mips-nat.c). */
1986 /* If PMON doesn't support this register, don't waste serial
1987 bandwidth trying to read it. */
1988 int pmon_reg
= mips_map_regno (regno
);
1989 if (regno
!= 0 && pmon_reg
== 0)
1993 /* Unfortunately the PMON version in the Vr4300 board has been
1994 compiled without the 64bit register access commands. This
1995 means we cannot get hold of the full register width. */
1996 if (mips_monitor
== MON_DDB
)
1997 val
= (unsigned) mips_request ('t', (unsigned int) pmon_reg
,
1998 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2000 val
= mips_request ('r', (unsigned int) pmon_reg
,
2001 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2003 mips_error ("Can't read register %d: %s", regno
,
2004 safe_strerror (errno
));
2009 char buf
[MAX_REGISTER_RAW_SIZE
];
2011 /* We got the number the register holds, but gdb expects to see a
2012 value in the target byte ordering. */
2013 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
2014 supply_register (regno
, buf
);
2018 /* Prepare to store registers. The MIPS protocol can store individual
2019 registers, so this function doesn't have to do anything. */
2022 mips_prepare_to_store ()
2026 /* Store remote register(s). */
2029 mips_store_registers (regno
)
2036 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2037 mips_store_registers (regno
);
2041 mips_request ('R', (unsigned int) mips_map_regno (regno
),
2042 read_register (regno
),
2043 &err
, mips_receive_wait
, NULL
);
2045 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2048 /* Fetch a word from the target board. */
2051 mips_fetch_word (addr
)
2057 /* FIXME! addr was cast to uint! */
2058 val
= mips_request ('d', addr
, (unsigned int) 0, &err
,
2059 mips_receive_wait
, NULL
);
2062 /* Data space failed; try instruction space. */
2063 /* FIXME! addr was cast to uint! */
2064 val
= mips_request ('i', addr
, (unsigned int) 0, &err
,
2065 mips_receive_wait
, NULL
);
2067 mips_error ("Can't read address 0x%s: %s",
2068 paddr_nz (addr
), safe_strerror (errno
));
2073 /* Store a word to the target board. Returns errno code or zero for
2074 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2075 memory location there. */
2077 /* FIXME! make sure only 32-bit quantities get stored! */
2079 mips_store_word (addr
, val
, old_contents
)
2085 unsigned int oldcontents
;
2087 oldcontents
= mips_request ('D', addr
, (unsigned int) val
,
2089 mips_receive_wait
, NULL
);
2092 /* Data space failed; try instruction space. */
2093 oldcontents
= mips_request ('I', addr
,
2094 (unsigned int) val
, &err
,
2095 mips_receive_wait
, NULL
);
2099 if (old_contents
!= NULL
)
2100 store_unsigned_integer (old_contents
, 4, oldcontents
);
2104 /* Read or write LEN bytes from inferior memory at MEMADDR,
2105 transferring to or from debugger address MYADDR. Write to inferior
2106 if SHOULD_WRITE is nonzero. Returns length of data written or
2107 read; 0 for error. Note that protocol gives us the correct value
2108 for a longword, since it transfers values in ASCII. We want the
2109 byte values, so we have to swap the longword values. */
2112 mips_xfer_memory (memaddr
, myaddr
, len
, write
, ignore
)
2117 struct target_ops
*ignore
;
2120 /* Round starting address down to longword boundary. */
2121 register CORE_ADDR addr
= memaddr
& ~3;
2122 /* Round ending address up; get number of longwords that makes. */
2123 register int count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2124 /* Allocate buffer of that many longwords. */
2125 register char *buffer
= alloca (count
* 4);
2131 /* Fill start and end extra bytes of buffer with existing data. */
2132 if (addr
!= memaddr
|| len
< 4)
2134 /* Need part of initial word -- fetch it. */
2135 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2140 /* Need part of last word -- fetch it. FIXME: we do this even
2141 if we don't need it. */
2142 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2143 mips_fetch_word (addr
+ (count
- 1) * 4));
2146 /* Copy data to be written over corresponding part of buffer */
2148 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2150 /* Write the entire buffer. */
2152 for (i
= 0; i
< count
; i
++, addr
+= 4)
2154 status
= mips_store_word (addr
,
2155 extract_unsigned_integer (&buffer
[i
* 4], 4),
2157 /* Report each kilobyte (we download 32-bit words at a time) */
2160 printf_unfiltered ("*");
2161 gdb_flush (gdb_stdout
);
2168 /* FIXME: Do we want a QUIT here? */
2171 printf_unfiltered ("\n");
2175 /* Read all the longwords */
2176 for (i
= 0; i
< count
; i
++, addr
+= 4)
2178 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2182 /* Copy appropriate bytes out of the buffer. */
2183 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2188 /* Print info on this target. */
2191 mips_files_info (ignore
)
2192 struct target_ops
*ignore
;
2194 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2197 /* Kill the process running on the board. This will actually only
2198 work if we are doing remote debugging over the console input. I
2199 think that if IDT/sim had the remote debug interrupt enabled on the
2200 right port, we could interrupt the process with a break signal. */
2205 if (!mips_wait_flag
)
2210 if (interrupt_count
>= 2)
2212 interrupt_count
= 0;
2214 target_terminal_ours ();
2216 if (query ("Interrupted while waiting for the program.\n\
2217 Give up (and stop debugging it)? "))
2219 /* Clean up in such a way that mips_close won't try to talk to the
2220 board (it almost surely won't work since we weren't able to talk to
2225 printf_unfiltered ("Ending remote MIPS debugging.\n");
2226 target_mourn_inferior ();
2228 return_to_top_level (RETURN_QUIT
);
2231 target_terminal_inferior ();
2234 if (remote_debug
> 0)
2235 printf_unfiltered ("Sending break\n");
2237 SERIAL_SEND_BREAK (mips_desc
);
2246 SERIAL_WRITE (mips_desc
, &cc
, 1);
2248 target_mourn_inferior ();
2253 /* Start running on the target board. */
2256 mips_create_inferior (execfile
, args
, env
)
2266 Can't pass arguments to remote MIPS board; arguments ignored.");
2267 /* And don't try to use them on the next "run" command. */
2268 execute_command ("set args", 0);
2271 if (execfile
== 0 || exec_bfd
== 0)
2272 error ("No executable file specified");
2274 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2276 init_wait_for_inferior ();
2278 /* FIXME: Should we set inferior_pid here? */
2280 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2283 /* Clean up after a process. Actually nothing to do. */
2286 mips_mourn_inferior ()
2288 if (current_ops
!= NULL
)
2289 unpush_target (current_ops
);
2290 generic_mourn_inferior ();
2293 /* We can write a breakpoint and read the shadow contents in one
2296 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2297 support, we read the contents of the target location and stash it,
2298 then overwrite it with a breakpoint instruction. ADDR is the target
2299 location in the target machine. CONTENTS_CACHE is a pointer to
2300 memory allocated for saving the target contents. It is guaranteed
2301 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2302 is accomplished via BREAKPOINT_MAX). */
2305 mips_insert_breakpoint (addr
, contents_cache
)
2307 char *contents_cache
;
2309 if (monitor_supports_breakpoints
)
2310 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2312 return memory_insert_breakpoint (addr
, contents_cache
);
2316 mips_remove_breakpoint (addr
, contents_cache
)
2318 char *contents_cache
;
2320 if (monitor_supports_breakpoints
)
2321 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2323 return memory_remove_breakpoint (addr
, contents_cache
);
2326 #if 0 /* currently not used */
2327 /* PMON does not currently provide support for the debug mode 'b'
2328 commands to manipulate breakpoints. However, if we wanted to use
2329 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2330 then this code performs the work needed to leave debug mode,
2331 set/clear the breakpoint, and then return to debug mode. */
2333 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2334 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2335 /* NOTE: The code relies on this vector being zero-initialised by the system */
2338 pmon_insert_breakpoint (addr
, contents_cache
)
2340 char *contents_cache
;
2344 if (monitor_supports_breakpoints
)
2346 char tbuff
[12]; /* space for breakpoint command */
2350 /* PMON does not support debug level breakpoint set/remove: */
2351 if (mips_exit_debug ())
2352 mips_error ("Failed to exit debug mode");
2354 sprintf (tbuff
, "b %08x\r", addr
);
2355 mips_send_command (tbuff
, 0);
2357 mips_expect ("Bpt ");
2359 if (!mips_getstring (tbuff
, 2))
2361 tbuff
[2] = '\0'; /* terminate the string */
2362 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2364 fprintf_unfiltered (gdb_stderr
,
2365 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2369 mips_expect (" = ");
2371 /* Lead in the hex number we are expecting: */
2375 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2376 which targets return 64-bit addresses? PMON returns only 32! */
2377 if (!mips_getstring (&tbuff
[2], 8))
2379 tbuff
[10] = '\0'; /* terminate the string */
2381 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2383 fprintf_unfiltered (gdb_stderr
,
2384 "Invalid hex address from target: %s\n", tbuff
);
2388 if (bpnum
>= PMON_MAX_BP
)
2390 fprintf_unfiltered (gdb_stderr
,
2391 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2392 bpnum
, PMON_MAX_BP
- 1);
2397 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2399 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2401 mips_expect ("\r\n");
2402 mips_expect (mips_monitor_prompt
);
2404 mips_enter_debug ();
2409 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2413 pmon_remove_breakpoint (addr
, contents_cache
)
2415 char *contents_cache
;
2417 if (monitor_supports_breakpoints
)
2420 char tbuff
[7]; /* enough for delete breakpoint command */
2422 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2423 if (mips_pmon_bp_info
[bpnum
] == addr
)
2426 if (bpnum
>= PMON_MAX_BP
)
2428 fprintf_unfiltered (gdb_stderr
,
2429 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2434 if (mips_exit_debug ())
2435 mips_error ("Failed to exit debug mode");
2437 sprintf (tbuff
, "db %02d\r", bpnum
);
2439 mips_send_command (tbuff
, -1);
2440 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2441 set" message will be returned. */
2443 mips_enter_debug ();
2448 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2453 /* Tell whether this target can support a hardware breakpoint. CNT
2454 is the number of hardware breakpoints already installed. This
2455 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2458 remote_mips_can_use_hardware_watchpoint (cnt
)
2461 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2465 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2466 This is used for memory ref breakpoints. */
2468 static unsigned long
2469 calculate_mask (addr
, len
)
2476 mask
= addr
^ (addr
+ len
- 1);
2478 for (i
= 32; i
>= 0; i
--)
2484 mask
= (unsigned long) 0xffffffff >> i
;
2490 /* Insert a hardware breakpoint. This works only on LSI targets, which
2491 implement ordinary breakpoints using hardware facilities. */
2494 remote_mips_insert_hw_breakpoint (addr
, contents_cache
)
2496 char *contents_cache
;
2498 if (strcmp (target_shortname
, "lsi") == 0)
2499 return mips_insert_breakpoint (addr
, contents_cache
);
2505 /* Remove a hardware breakpoint. This works only on LSI targets, which
2506 implement ordinary breakpoints using hardware facilities. */
2509 remote_mips_remove_hw_breakpoint (addr
, contents_cache
)
2511 char *contents_cache
;
2513 if (strcmp (target_shortname
, "lsi") == 0)
2514 return mips_remove_breakpoint (addr
, contents_cache
);
2519 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2520 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2524 remote_mips_set_watchpoint (addr
, len
, type
)
2529 if (set_breakpoint (addr
, len
, type
))
2536 remote_mips_remove_watchpoint (addr
, len
, type
)
2541 if (clear_breakpoint (addr
, len
, type
))
2548 remote_mips_stopped_by_watchpoint ()
2550 return hit_watchpoint
;
2554 /* Insert a breakpoint. */
2557 set_breakpoint (addr
, len
, type
)
2560 enum break_type type
;
2562 return common_breakpoint (1, addr
, len
, type
);
2566 /* Clear a breakpoint. */
2569 clear_breakpoint (addr
, len
, type
)
2572 enum break_type type
;
2574 return common_breakpoint (0, addr
, len
, type
);
2578 /* Check the error code from the return packet for an LSI breakpoint
2579 command. If there's no error, just return 0. If it's a warning,
2580 print the warning text and return 0. If it's an error, print
2581 the error text and return 1. <ADDR> is the address of the breakpoint
2582 that was being set. <RERRFLG> is the error code returned by PMON.
2583 This is a helper function for common_breakpoint. */
2586 check_lsi_error (addr
, rerrflg
)
2590 struct lsi_error
*err
;
2591 char *saddr
= paddr_nz (addr
); /* printable address string */
2593 if (rerrflg
== 0) /* no error */
2596 /* Warnings can be ORed together, so check them all. */
2597 if (rerrflg
& W_WARN
)
2599 if (monitor_warnings
)
2602 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2604 if ((err
->code
& rerrflg
) == err
->code
)
2607 fprintf_unfiltered (gdb_stderr
,
2608 "common_breakpoint (0x%s): Warning: %s\n",
2614 fprintf_unfiltered (gdb_stderr
,
2615 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2622 /* Errors are unique, i.e. can't be ORed together. */
2623 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2625 if ((err
->code
& rerrflg
) == err
->code
)
2627 fprintf_unfiltered (gdb_stderr
,
2628 "common_breakpoint (0x%s): Error: %s\n",
2634 fprintf_unfiltered (gdb_stderr
,
2635 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2642 /* This routine sends a breakpoint command to the remote target.
2644 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2645 <ADDR> is the address of the breakpoint.
2646 <LEN> the length of the region to break on.
2647 <TYPE> is the type of breakpoint:
2648 0 = write (BREAK_WRITE)
2649 1 = read (BREAK_READ)
2650 2 = read/write (BREAK_ACCESS)
2651 3 = instruction fetch (BREAK_FETCH)
2653 Return 0 if successful; otherwise 1. */
2656 common_breakpoint (set
, addr
, len
, type
)
2660 enum break_type type
;
2662 char buf
[DATA_MAXLEN
+ 1];
2664 int rpid
, rerrflg
, rresponse
, rlen
;
2667 addr
= ADDR_BITS_REMOVE (addr
);
2669 if (mips_monitor
== MON_LSI
)
2671 if (set
== 0) /* clear breakpoint */
2673 /* The LSI PMON "clear breakpoint" has this form:
2674 <pid> 'b' <bptn> 0x0
2676 <pid> 'b' 0x0 <code>
2678 <bptn> is a breakpoint number returned by an earlier 'B' command.
2679 Possible return codes: OK, E_BPT. */
2683 /* Search for the breakpoint in the table. */
2684 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2685 if (lsi_breakpoints
[i
].type
== type
2686 && lsi_breakpoints
[i
].addr
== addr
2687 && lsi_breakpoints
[i
].len
== len
)
2690 /* Clear the table entry and tell PMON to clear the breakpoint. */
2691 if (i
== MAX_LSI_BREAKPOINTS
)
2693 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2698 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2699 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2700 mips_send_packet (buf
, 1);
2702 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2705 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2707 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2709 return (check_lsi_error (addr
, rerrflg
));
2712 /* set a breakpoint */
2714 /* The LSI PMON "set breakpoint" command has this form:
2715 <pid> 'B' <addr> 0x0
2717 <pid> 'B' <bptn> <code>
2719 The "set data breakpoint" command has this form:
2721 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2723 where: type= "0x1" = read
2725 "0x3" = access (read or write)
2727 The reply returns two values:
2728 bptn - a breakpoint number, which is a small integer with
2729 possible values of zero through 255.
2730 code - an error return code, a value of zero indicates a
2731 succesful completion, other values indicate various
2732 errors and warnings.
2734 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2738 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2741 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2747 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2748 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2749 paddr_nz (addr
+ len
- 1));
2751 mips_send_packet (buf
, 1);
2753 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2756 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2757 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2758 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2759 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2762 if (check_lsi_error (addr
, rerrflg
))
2765 /* rresponse contains PMON's breakpoint number. Record the
2766 information for this breakpoint so we can clear it later. */
2767 lsi_breakpoints
[rresponse
].type
= type
;
2768 lsi_breakpoints
[rresponse
].addr
= addr
;
2769 lsi_breakpoints
[rresponse
].len
= len
;
2776 /* On non-LSI targets, the breakpoint command has this form:
2777 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2778 <MASK> is a don't care mask for addresses.
2779 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2783 mask
= calculate_mask (addr
, len
);
2786 if (set
) /* set a breakpoint */
2791 case BREAK_WRITE
: /* write */
2794 case BREAK_READ
: /* read */
2797 case BREAK_ACCESS
: /* read/write */
2800 case BREAK_FETCH
: /* fetch */
2808 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2809 paddr_nz (mask
), flags
);
2814 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2817 mips_send_packet (buf
, 1);
2819 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2822 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2823 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2825 if (nfields
!= 4 || rcmd
!= cmd
)
2826 mips_error ("common_breakpoint: Bad response from remote board: %s",
2831 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2832 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2833 if (mips_monitor
== MON_DDB
)
2834 rresponse
= rerrflg
;
2835 if (rresponse
!= 22) /* invalid argument */
2836 fprintf_unfiltered (gdb_stderr
,
2837 "common_breakpoint (0x%s): Got error: 0x%x\n",
2838 paddr_nz (addr
), rresponse
);
2846 send_srec (srec
, len
, addr
)
2855 SERIAL_WRITE (mips_desc
, srec
, len
);
2857 ch
= mips_readchar (2);
2861 case SERIAL_TIMEOUT
:
2862 error ("Timeout during download.");
2866 case 0x15: /* NACK */
2867 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %d! Retrying.\n", addr
);
2870 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2875 /* Download a binary file by converting it to S records. */
2878 mips_load_srec (args
)
2883 char *buffer
, srec
[1024];
2885 unsigned int srec_frame
= 200;
2887 static int hashmark
= 1;
2889 buffer
= alloca (srec_frame
* 2 + 256);
2891 abfd
= bfd_openr (args
, 0);
2894 printf_filtered ("Unable to open file %s\n", args
);
2898 if (bfd_check_format (abfd
, bfd_object
) == 0)
2900 printf_filtered ("File is not an object file\n");
2904 /* This actually causes a download in the IDT binary format: */
2905 mips_send_command (LOAD_CMD
, 0);
2907 for (s
= abfd
->sections
; s
; s
= s
->next
)
2909 if (s
->flags
& SEC_LOAD
)
2911 unsigned int numbytes
;
2913 /* FIXME! vma too small?? */
2914 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
,
2915 s
->vma
+ s
->_raw_size
);
2916 gdb_flush (gdb_stdout
);
2918 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2920 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2922 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2924 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2925 send_srec (srec
, reclen
, s
->vma
+ i
);
2929 putchar_unfiltered ('#');
2930 gdb_flush (gdb_stdout
);
2933 } /* Per-packet (or S-record) loop */
2935 putchar_unfiltered ('\n');
2936 } /* Loadable sections */
2939 putchar_unfiltered ('\n');
2941 /* Write a type 7 terminator record. no data for a type 7, and there
2942 is no data, so len is 0. */
2944 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2946 send_srec (srec
, reclen
, abfd
->start_address
);
2948 SERIAL_FLUSH_INPUT (mips_desc
);
2952 * mips_make_srec -- make an srecord. This writes each line, one at a
2953 * time, each with it's own header and trailer line.
2954 * An srecord looks like this:
2956 * byte count-+ address
2957 * start ---+ | | data +- checksum
2959 * S01000006F6B692D746573742E73726563E4
2960 * S315000448600000000000000000FC00005900000000E9
2961 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2962 * S30B0004485A0000000000004E
2965 * S<type><length><address><data><checksum>
2969 * is the number of bytes following upto the checksum. Note that
2970 * this is not the number of chars following, since it takes two
2971 * chars to represent a byte.
2975 * 1) two byte address data record
2976 * 2) three byte address data record
2977 * 3) four byte address data record
2978 * 7) four byte address termination record
2979 * 8) three byte address termination record
2980 * 9) two byte address termination record
2983 * is the start address of the data following, or in the case of
2984 * a termination record, the start address of the image
2988 * is the sum of all the raw byte data in the record, from the length
2989 * upwards, modulo 256 and subtracted from 255.
2991 * This routine returns the length of the S-record.
2996 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
3000 unsigned char *myaddr
;
3003 unsigned char checksum
;
3006 /* Create the header for the srec. addr_size is the number of bytes in the address,
3007 and 1 is the number of bytes in the count. */
3009 /* FIXME!! bigger buf required for 64-bit! */
3012 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
3013 /* This assumes S3 style downloads (4byte addresses). There should
3014 probably be a check, or the code changed to make it more
3016 buf
[3] = memaddr
>> 24;
3017 buf
[4] = memaddr
>> 16;
3018 buf
[5] = memaddr
>> 8;
3020 memcpy (&buf
[7], myaddr
, len
);
3022 /* Note that the checksum is calculated on the raw data, not the
3023 hexified data. It includes the length, address and the data
3024 portions of the packet. */
3026 buf
+= 2; /* Point at length byte */
3027 for (i
= 0; i
< len
+ 4 + 1; i
++)
3035 /* The following manifest controls whether we enable the simple flow
3036 control support provided by the monitor. If enabled the code will
3037 wait for an affirmative ACK between transmitting packets. */
3038 #define DOETXACK (1)
3040 /* The PMON fast-download uses an encoded packet format constructed of
3041 3byte data packets (encoded as 4 printable ASCII characters), and
3042 escape sequences (preceded by a '/'):
3045 'C' compare checksum (12bit value, not included in checksum calculation)
3046 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3047 'Z' zero fill multiple of 3bytes
3048 'B' byte (12bit encoded value, of 8bit data)
3049 'A' address (36bit encoded value)
3050 'E' define entry as original address, and exit load
3052 The packets are processed in 4 character chunks, so the escape
3053 sequences that do not have any data (or variable length data)
3054 should be padded to a 4 character boundary. The decoder will give
3055 an error if the complete message block size is not a multiple of
3056 4bytes (size of record).
3058 The encoding of numbers is done in 6bit fields. The 6bit value is
3059 used to index into this string to get the specific character
3060 encoding for the value: */
3061 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3063 /* Convert the number of bits required into an encoded number, 6bits
3064 at a time (range 0..63). Keep a checksum if required (passed
3065 pointer non-NULL). The function returns the number of encoded
3066 characters written into the buffer. */
3068 pmon_makeb64 (v
, p
, n
, chksum
)
3074 int count
= (n
/ 6);
3078 fprintf_unfiltered (gdb_stderr
,
3079 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
3084 fprintf_unfiltered (gdb_stderr
,
3085 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3089 /* Deal with the checksum: */
3095 *chksum
+= ((v
>> 24) & 0xFFF);
3097 *chksum
+= ((v
>> 12) & 0xFFF);
3099 *chksum
+= ((v
>> 0) & 0xFFF);
3106 *p
++ = encoding
[(v
>> n
) & 0x3F];
3113 /* Shorthand function (that could be in-lined) to output the zero-fill
3114 escape sequence into the data stream. */
3116 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3120 unsigned int *chksum
;
3124 sprintf (*buff
, "/Z");
3125 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3126 *buff
+= (count
+ 2);
3128 return (recsize
+ count
+ 2);
3132 pmon_checkset (recsize
, buff
, value
)
3139 /* Add the checksum (without updating the value): */
3140 sprintf (*buff
, "/C");
3141 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3142 *buff
+= (count
+ 2);
3143 sprintf (*buff
, "\n");
3144 *buff
+= 2; /* include zero terminator */
3145 /* Forcing a checksum validation clears the sum: */
3147 return (recsize
+ count
+ 3);
3150 /* Amount of padding we leave after at the end of the output buffer,
3151 for the checksum and line termination characters: */
3152 #define CHECKSIZE (4 + 4 + 4 + 2)
3153 /* zero-fill, checksum, transfer end and line termination space. */
3155 /* The amount of binary data loaded from the object file in a single
3157 #define BINCHUNK (1024)
3159 /* Maximum line of data accepted by the monitor: */
3160 #define MAXRECSIZE (550)
3161 /* NOTE: This constant depends on the monitor being used. This value
3162 is for PMON 5.x on the Cogent Vr4300 board. */
3165 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3167 unsigned char *inbuf
;
3172 unsigned int *zerofill
;
3177 /* This is a simple check to ensure that our data will fit within
3178 the maximum allowable record size. Each record output is 4bytes
3179 in length. We must allow space for a pending zero fill command,
3180 the record, and a checksum record. */
3181 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3183 /* Process the binary data: */
3184 if ((inamount
- *inptr
) < 3)
3187 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3189 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3191 *recsize
+= (2 + count
);
3196 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3197 /* Simple check for zero data. TODO: A better check would be
3198 to check the last, and then the middle byte for being zero
3199 (if the first byte is not). We could then check for
3200 following runs of zeros, and if above a certain size it is
3201 worth the 4 or 8 character hit of the byte insertions used
3202 to pad to the start of the zeroes. NOTE: This also depends
3203 on the alignment at the end of the zero run. */
3204 if (value
== 0x00000000)
3207 if (*zerofill
== 0xFFF) /* 12bit counter */
3208 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3213 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3214 count
= pmon_makeb64 (value
, p
, 24, csum
);
3227 pmon_check_ack (mesg
)
3230 #if defined(DOETXACK)
3235 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3236 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3238 fprintf_unfiltered (gdb_stderr
,
3239 "Failed to receive valid ACK for %s\n", mesg
);
3240 return (-1); /* terminate the download */
3243 #endif /* DOETXACK */
3247 /* pmon_download - Send a sequence of characters to the PMON download port,
3248 which is either a serial port or a UDP socket. */
3251 pmon_start_download ()
3255 /* Create the temporary download file. */
3256 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3257 perror_with_name (tftp_localname
);
3261 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3262 mips_expect ("Downloading from ");
3263 mips_expect (udp_in_use
? "udp" : "tty0");
3264 mips_expect (", ^C to abort\r\n");
3269 mips_expect_download (char *string
)
3271 if (!mips_expect (string
))
3273 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3275 remove (tftp_localname
); /* Remove temporary file */
3283 pmon_end_download (final
, bintotal
)
3287 char hexnumber
[9]; /* includes '\0' space */
3291 static char *load_cmd_prefix
= "load -b -s ";
3295 /* Close off the temporary file containing the load data. */
3299 /* Make the temporary file readable by the world. */
3300 if (stat (tftp_localname
, &stbuf
) == 0)
3301 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3303 /* Must reinitialize the board to prevent PMON from crashing. */
3304 mips_send_command ("initEther\r", -1);
3306 /* Send the load command. */
3307 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3308 strcpy (cmd
, load_cmd_prefix
);
3309 strcat (cmd
, tftp_name
);
3311 mips_send_command (cmd
, 0);
3313 if (!mips_expect_download ("Downloading from "))
3315 if (!mips_expect_download (tftp_name
))
3317 if (!mips_expect_download (", ^C to abort\r\n"))
3321 /* Wait for the stuff that PMON prints after the load has completed.
3322 The timeout value for use in the tftp case (15 seconds) was picked
3323 arbitrarily but might be too small for really large downloads. FIXME. */
3324 if (mips_monitor
== MON_LSI
)
3326 pmon_check_ack ("termination");
3327 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3330 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3332 sprintf (hexnumber
, "%x", final
);
3333 mips_expect (hexnumber
);
3334 mips_expect ("\r\n");
3335 if (mips_monitor
!= MON_LSI
)
3336 pmon_check_ack ("termination");
3337 mips_expect ("\r\ntotal = 0x");
3338 sprintf (hexnumber
, "%x", bintotal
);
3339 mips_expect (hexnumber
);
3340 if (!mips_expect_download (" bytes\r\n"))
3344 remove (tftp_localname
); /* Remove temporary file */
3348 pmon_download (buffer
, length
)
3353 fwrite (buffer
, 1, length
, tftp_file
);
3355 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3359 pmon_load_fast (file
)
3364 unsigned char *binbuf
;
3367 unsigned int csum
= 0;
3368 int hashmark
= !tftp_in_use
;
3373 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3374 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3376 abfd
= bfd_openr (file
, 0);
3379 printf_filtered ("Unable to open file %s\n", file
);
3383 if (bfd_check_format (abfd
, bfd_object
) == 0)
3385 printf_filtered ("File is not an object file\n");
3389 /* Setup the required download state: */
3390 mips_send_command ("set dlproto etxack\r", -1);
3391 mips_send_command ("set dlecho off\r", -1);
3392 /* NOTE: We get a "cannot set variable" message if the variable is
3393 already defined to have the argument we give. The code doesn't
3394 care, since it just scans to the next prompt anyway. */
3395 /* Start the download: */
3396 pmon_start_download ();
3398 /* Zero the checksum */
3399 sprintf (buffer
, "/Kxx\n");
3400 reclen
= strlen (buffer
);
3401 pmon_download (buffer
, reclen
);
3402 finished
= pmon_check_ack ("/Kxx");
3404 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3405 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3407 bintotal
+= s
->_raw_size
;
3408 final
= (s
->vma
+ s
->_raw_size
);
3410 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3411 (unsigned int) (s
->vma
+ s
->_raw_size
));
3412 gdb_flush (gdb_stdout
);
3414 /* Output the starting address */
3415 sprintf (buffer
, "/A");
3416 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3417 buffer
[2 + reclen
] = '\n';
3418 buffer
[3 + reclen
] = '\0';
3419 reclen
+= 3; /* for the initial escape code and carriage return */
3420 pmon_download (buffer
, reclen
);
3421 finished
= pmon_check_ack ("/A");
3425 unsigned int binamount
;
3426 unsigned int zerofill
= 0;
3432 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3436 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3438 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3440 /* This keeps a rolling checksum, until we decide to output
3442 for (; ((binamount
- binptr
) > 0);)
3444 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3445 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3447 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3448 pmon_download (buffer
, reclen
);
3449 finished
= pmon_check_ack ("data record");
3452 zerofill
= 0; /* do not transmit pending zerofills */
3458 putchar_unfiltered ('#');
3459 gdb_flush (gdb_stdout
);
3463 reclen
= 0; /* buffer processed */
3468 /* Ensure no out-standing zerofill requests: */
3470 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3472 /* and then flush the line: */
3475 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3476 /* Currently pmon_checkset outputs the line terminator by
3477 default, so we write out the buffer so far: */
3478 pmon_download (buffer
, reclen
);
3479 finished
= pmon_check_ack ("record remnant");
3483 putchar_unfiltered ('\n');
3486 /* Terminate the transfer. We know that we have an empty output
3487 buffer at this point. */
3488 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3489 reclen
= strlen (buffer
);
3490 pmon_download (buffer
, reclen
);
3493 { /* Ignore the termination message: */
3494 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3497 { /* Deal with termination message: */
3498 pmon_end_download (final
, bintotal
);
3504 /* mips_load -- download a file. */
3507 mips_load (file
, from_tty
)
3511 /* Get the board out of remote debugging mode. */
3512 if (mips_exit_debug ())
3513 error ("mips_load: Couldn't get into monitor mode.");
3515 if (mips_monitor
!= MON_IDT
)
3516 pmon_load_fast (file
);
3518 mips_load_srec (file
);
3522 /* Finally, make the PC point at the start address */
3523 if (mips_monitor
!= MON_IDT
)
3525 /* Work around problem where PMON monitor updates the PC after a load
3526 to a different value than GDB thinks it has. The following ensures
3527 that the write_pc() WILL update the PC value: */
3528 register_valid
[PC_REGNUM
] = 0;
3531 write_pc (bfd_get_start_address (exec_bfd
));
3533 inferior_pid
= 0; /* No process now */
3535 /* This is necessary because many things were based on the PC at the time that
3536 we attached to the monitor, which is no longer valid now that we have loaded
3537 new code (and just changed the PC). Another way to do this might be to call
3538 normal_stop, except that the stack may not be valid, and things would get
3539 horribly confused... */
3541 clear_symtab_users ();
3545 /* Pass the command argument as a packet to PMON verbatim. */
3548 pmon_command (args
, from_tty
)
3552 char buf
[DATA_MAXLEN
+ 1];
3555 sprintf (buf
, "0x0 %s", args
);
3556 mips_send_packet (buf
, 1);
3557 printf_filtered ("Send packet: %s\n", buf
);
3559 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3561 printf_filtered ("Received packet: %s\n", buf
);
3565 _initialize_remote_mips ()
3567 /* Initialize the fields in mips_ops that are common to all four targets. */
3568 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3569 mips_ops
.to_close
= mips_close
;
3570 mips_ops
.to_detach
= mips_detach
;
3571 mips_ops
.to_resume
= mips_resume
;
3572 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3573 mips_ops
.to_store_registers
= mips_store_registers
;
3574 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3575 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3576 mips_ops
.to_files_info
= mips_files_info
;
3577 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3578 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3579 mips_ops
.to_kill
= mips_kill
;
3580 mips_ops
.to_load
= mips_load
;
3581 mips_ops
.to_create_inferior
= mips_create_inferior
;
3582 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3583 mips_ops
.to_stratum
= process_stratum
;
3584 mips_ops
.to_has_all_memory
= 1;
3585 mips_ops
.to_has_memory
= 1;
3586 mips_ops
.to_has_stack
= 1;
3587 mips_ops
.to_has_registers
= 1;
3588 mips_ops
.to_has_execution
= 1;
3589 mips_ops
.to_magic
= OPS_MAGIC
;
3591 /* Copy the common fields to all four target vectors. */
3592 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3594 /* Initialize target-specific fields in the target vectors. */
3595 mips_ops
.to_shortname
= "mips";
3596 mips_ops
.to_doc
= "\
3597 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3598 The argument is the device it is connected to or, if it contains a colon,\n\
3599 HOST:PORT to access a board over a network";
3600 mips_ops
.to_open
= mips_open
;
3601 mips_ops
.to_wait
= mips_wait
;
3603 pmon_ops
.to_shortname
= "pmon";
3604 pmon_ops
.to_doc
= "\
3605 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3606 line. The argument is the device it is connected to or, if it contains a\n\
3607 colon, HOST:PORT to access a board over a network";
3608 pmon_ops
.to_open
= pmon_open
;
3609 pmon_ops
.to_wait
= mips_wait
;
3611 ddb_ops
.to_shortname
= "ddb";
3613 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3614 line. The first argument is the device it is connected to or, if it contains\n\
3615 a colon, HOST:PORT to access a board over a network. The optional second\n\
3616 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3617 TFTP downloads to the board. The optional third parameter is the local name\n\
3618 of the TFTP temporary file, if it differs from the filename seen by the board.";
3619 ddb_ops
.to_open
= ddb_open
;
3620 ddb_ops
.to_wait
= mips_wait
;
3622 lsi_ops
.to_shortname
= "lsi";
3623 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3624 lsi_ops
.to_open
= lsi_open
;
3625 lsi_ops
.to_wait
= mips_wait
;
3627 /* Add the targets. */
3628 add_target (&mips_ops
);
3629 add_target (&pmon_ops
);
3630 add_target (&ddb_ops
);
3631 add_target (&lsi_ops
);
3634 add_set_cmd ("timeout", no_class
, var_zinteger
,
3635 (char *) &mips_receive_wait
,
3636 "Set timeout in seconds for remote MIPS serial I/O.",
3641 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3642 (char *) &mips_retransmit_wait
,
3643 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3644 This is the number of seconds to wait for an acknowledgement to a packet\n\
3645 before resending the packet.", &setlist
),
3649 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3650 (char *) &mips_syn_garbage
,
3651 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3652 This is the maximum number of characters GDB will ignore when trying to\n\
3653 synchronize with the remote system. A value of -1 means that there is no limit\n\
3654 (Note that these characters are printed out even though they are ignored.)",
3659 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3660 (char *) &mips_monitor_prompt
,
3661 "Set the prompt that GDB expects from the monitor.",
3666 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3667 (char *) &monitor_warnings
,
3668 "Set printing of monitor warnings.\n"
3669 "When enabled, monitor warnings about hardware breakpoints "
3670 "will be displayed.",
3674 add_com ("pmon <command>", class_obscure
, pmon_command
,
3675 "Send a packet to PMON (must be in debug mode).");