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, Boston, MA 02111-1307, USA. */
31 #include "remote-utils.h"
32 #include "gdb_string.h"
35 #include <sys/types.h>
37 #ifdef ANSI_PROTOTYPES
43 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
45 #define S_IROTH S_IREAD
48 extern void mips_set_processor_type_command
PARAMS ((char *, int));
51 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
52 types passed by breakpoint.c to target_insert_watchpoint.
53 Value 3 is our own invention, and is used for ordinary instruction
54 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
63 /* Prototypes for local functions. */
65 static int mips_readchar
PARAMS ((int timeout
));
67 static int mips_receive_header
PARAMS ((unsigned char *hdr
, int *pgarbage
,
68 int ch
, int timeout
));
70 static int mips_receive_trailer
PARAMS ((unsigned char *trlr
, int *pgarbage
,
71 int *pch
, int timeout
));
73 static int mips_cksum
PARAMS ((const unsigned char *hdr
,
74 const unsigned char *data
,
77 static void mips_send_packet
PARAMS ((const char *s
, int get_ack
));
79 static void mips_send_command
PARAMS ((const char *cmd
, int prompt
));
81 static int mips_receive_packet
PARAMS ((char *buff
, int throw_error
,
84 static CORE_ADDR mips_request
PARAMS ((int cmd
, CORE_ADDR addr
,
85 CORE_ADDR data
, int *perr
, int timeout
,
88 static void mips_initialize
PARAMS ((void));
90 static void mips_open
PARAMS ((char *name
, int from_tty
));
92 static void pmon_open
PARAMS ((char *name
, int from_tty
));
94 static void ddb_open
PARAMS ((char *name
, int from_tty
));
96 static void lsi_open
PARAMS ((char *name
, int from_tty
));
98 static void mips_close
PARAMS ((int quitting
));
100 static void mips_detach
PARAMS ((char *args
, int from_tty
));
102 static void mips_resume
PARAMS ((int pid
, int step
,
103 enum target_signal siggnal
));
105 static int mips_wait
PARAMS ((int pid
, struct target_waitstatus
*status
));
107 static int mips_map_regno
PARAMS ((int regno
));
109 static void mips_fetch_registers
PARAMS ((int regno
));
111 static void mips_prepare_to_store
PARAMS ((void));
113 static void mips_store_registers
PARAMS ((int regno
));
115 static unsigned int mips_fetch_word
PARAMS ((CORE_ADDR addr
));
117 static int mips_store_word
PARAMS ((CORE_ADDR addr
, unsigned int value
,
118 char *old_contents
));
120 static int mips_xfer_memory
PARAMS ((CORE_ADDR memaddr
, char *myaddr
, int len
,
121 int write
, struct target_ops
*ignore
));
123 static void mips_files_info
PARAMS ((struct target_ops
*ignore
));
125 static void mips_create_inferior
PARAMS ((char *execfile
, char *args
,
128 static void mips_mourn_inferior
PARAMS ((void));
130 static int pmon_makeb64
PARAMS ((unsigned long v
, char *p
, int n
, int *chksum
));
132 static int pmon_zeroset
PARAMS ((int recsize
, char **buff
, int *amount
,
133 unsigned int *chksum
));
135 static int pmon_checkset
PARAMS ((int recsize
, char **buff
, int *value
));
137 static void pmon_make_fastrec
PARAMS ((char **outbuf
, unsigned char *inbuf
,
138 int *inptr
, int inamount
, int *recsize
,
139 unsigned int *csum
, unsigned int *zerofill
));
141 static int pmon_check_ack
PARAMS ((char *mesg
));
143 static void pmon_start_download
PARAMS ((void));
145 static void pmon_end_download
PARAMS ((int final
, int bintotal
));
147 static void pmon_download
PARAMS ((char *buffer
, int length
));
149 static void pmon_load_fast
PARAMS ((char *file
));
151 static void mips_load
PARAMS ((char *file
, int from_tty
));
153 static int mips_make_srec
PARAMS ((char *buffer
, int type
, CORE_ADDR memaddr
,
154 unsigned char *myaddr
, int len
));
156 static int set_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
157 enum break_type type
));
159 static int clear_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
160 enum break_type type
));
162 static int common_breakpoint
PARAMS ((int set
, CORE_ADDR addr
, int len
,
163 enum break_type type
));
165 /* Forward declarations. */
166 extern struct target_ops mips_ops
;
167 extern struct target_ops pmon_ops
;
168 extern struct target_ops ddb_ops
;
170 /* The MIPS remote debugging interface is built on top of a simple
171 packet protocol. Each packet is organized as follows:
173 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
174 may not appear anywhere else in the packet. Any time a SYN is
175 seen, a new packet should be assumed to have begun.
178 This byte contains the upper five bits of the logical length
179 of the data section, plus a single bit indicating whether this
180 is a data packet or an acknowledgement. The documentation
181 indicates that this bit is 1 for a data packet, but the actual
182 board uses 1 for an acknowledgement. The value of the byte is
183 0x40 + (ack ? 0x20 : 0) + (len >> 6)
184 (we always have 0 <= len < 1024). Acknowledgement packets do
185 not carry data, and must have a data length of 0.
187 LEN1 This byte contains the lower six bits of the logical length of
188 the data section. The value is
191 SEQ This byte contains the six bit sequence number of the packet.
194 An acknowlegment packet contains the sequence number of the
195 packet being acknowledged plus 1 modulo 64. Data packets are
196 transmitted in sequence. There may only be one outstanding
197 unacknowledged data packet at a time. The sequence numbers
198 are independent in each direction. If an acknowledgement for
199 the previous packet is received (i.e., an acknowledgement with
200 the sequence number of the packet just sent) the packet just
201 sent should be retransmitted. If no acknowledgement is
202 received within a timeout period, the packet should be
203 retransmitted. This has an unfortunate failure condition on a
204 high-latency line, as a delayed acknowledgement may lead to an
205 endless series of duplicate packets.
207 DATA The actual data bytes follow. The following characters are
208 escaped inline with DLE (ASCII 020, or ^P):
214 The additional DLE characters are not counted in the logical
215 length stored in the TYPE_LEN and LEN1 bytes.
220 These bytes contain an 18 bit checksum of the complete
221 contents of the packet excluding the SEQ byte and the
222 CSUM[123] bytes. The checksum is simply the twos complement
223 addition of all the bytes treated as unsigned characters. The
224 values of the checksum bytes are:
225 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
226 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
227 CSUM3: 0x40 + (cksum & 0x3f)
229 It happens that the MIPS remote debugging protocol always
230 communicates with ASCII strings. Because of this, this
231 implementation doesn't bother to handle the DLE quoting mechanism,
232 since it will never be required. */
234 /* The SYN character which starts each packet. */
237 /* The 0x40 used to offset each packet (this value ensures that all of
238 the header and trailer bytes, other than SYN, are printable ASCII
240 #define HDR_OFFSET 0x40
242 /* The indices of the bytes in the packet header. */
243 #define HDR_INDX_SYN 0
244 #define HDR_INDX_TYPE_LEN 1
245 #define HDR_INDX_LEN1 2
246 #define HDR_INDX_SEQ 3
249 /* The data/ack bit in the TYPE_LEN header byte. */
250 #define TYPE_LEN_DA_BIT 0x20
251 #define TYPE_LEN_DATA 0
252 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
254 /* How to compute the header bytes. */
255 #define HDR_SET_SYN(data, len, seq) (SYN)
256 #define HDR_SET_TYPE_LEN(data, len, seq) \
258 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
259 + (((len) >> 6) & 0x1f))
260 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
261 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
263 /* Check that a header byte is reasonable. */
264 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
266 /* Get data from the header. These macros evaluate their argument
268 #define HDR_IS_DATA(hdr) \
269 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
270 #define HDR_GET_LEN(hdr) \
271 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
272 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
274 /* The maximum data length. */
275 #define DATA_MAXLEN 1023
277 /* The trailer offset. */
278 #define TRLR_OFFSET HDR_OFFSET
280 /* The indices of the bytes in the packet trailer. */
281 #define TRLR_INDX_CSUM1 0
282 #define TRLR_INDX_CSUM2 1
283 #define TRLR_INDX_CSUM3 2
284 #define TRLR_LENGTH 3
286 /* How to compute the trailer bytes. */
287 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
288 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
289 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
291 /* Check that a trailer byte is reasonable. */
292 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
294 /* Get data from the trailer. This evaluates its argument multiple
296 #define TRLR_GET_CKSUM(trlr) \
297 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
298 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
299 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
301 /* The sequence number modulos. */
302 #define SEQ_MODULOS (64)
304 /* PMON commands to load from the serial port or UDP socket. */
305 #define LOAD_CMD "load -b -s tty0\r"
306 #define LOAD_CMD_UDP "load -b -s udp\r"
308 /* The target vectors for the four different remote MIPS targets.
309 These are initialized with code in _initialize_remote_mips instead
310 of static initializers, to make it easier to extend the target_ops
312 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
314 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 */
419 } lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
421 /* Error/warning codes returned by LSI PMON for breakpoint commands.
422 Warning values may be ORed together; error values may not. */
423 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
424 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
425 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
426 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
428 #define E_ERR 0x200 /* This bit is set if the error code is an error */
429 #define E_BPT 0x200 /* error: No such breakpoint number */
430 #define E_RGE 0x201 /* error: Range is not supported */
431 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
432 #define E_OUT 0x203 /* error: Out of hardware resources */
433 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
437 int code
; /* error code */
438 char *string
; /* string associated with this code */
441 struct lsi_error lsi_warning_table
[] =
443 { W_MSK
, "Range feature is supported via mask" },
444 { W_VAL
, "Value check is not supported in hardware" },
445 { W_QAL
, "Requested qualifiers are not supported in hardware" },
449 struct lsi_error lsi_error_table
[] =
451 { E_BPT
, "No such breakpoint number" },
452 { E_RGE
, "Range is not supported" },
453 { E_QAL
, "The requested qualifiers can not be used" },
454 { E_OUT
, "Out of hardware resources" },
455 { E_NON
, "Hardware breakpoint not supported" },
459 /* Set to 1 with the 'set monitor-warnings' command to enable printing
460 of warnings returned by PMON when hardware breakpoints are used. */
461 static int monitor_warnings
;
468 SERIAL_CLOSE (mips_desc
);
472 SERIAL_CLOSE (udp_desc
);
478 /* Handle low-level error that we can't recover from. Note that just
479 error()ing out from target_wait or some such low-level place will cause
480 all hell to break loose--the rest of GDB will tend to get left in an
481 inconsistent state. */
484 #ifdef ANSI_PROTOTYPES
485 mips_error (char *string
, ...)
487 mips_error (va_alist
)
493 #ifdef ANSI_PROTOTYPES
494 va_start (args
, string
);
498 string
= va_arg (args
, char *);
501 target_terminal_ours ();
502 wrap_here(""); /* Force out any buffered output */
503 gdb_flush (gdb_stdout
);
505 fprintf_filtered (gdb_stderr
, error_pre_print
);
506 vfprintf_filtered (gdb_stderr
, string
, args
);
507 fprintf_filtered (gdb_stderr
, "\n");
509 gdb_flush (gdb_stderr
);
511 /* Clean up in such a way that mips_close won't try to talk to the
512 board (it almost surely won't work since we weren't able to talk to
516 printf_unfiltered ("Ending remote MIPS debugging.\n");
517 target_mourn_inferior ();
519 return_to_top_level (RETURN_ERROR
);
522 /* putc_readable - print a character, displaying non-printable chars in
523 ^x notation or in hex. */
530 putchar_unfiltered ('\n');
532 printf_unfiltered ("\\r");
533 else if (ch
< 0x20) /* ASCII control character */
534 printf_unfiltered ("^%c", ch
+ '@');
535 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
536 printf_unfiltered ("[%02x]", ch
& 0xff);
538 putchar_unfiltered (ch
);
542 /* puts_readable - print a string, displaying non-printable chars in
543 ^x notation or in hex. */
546 puts_readable (string
)
551 while ((c
= *string
++) != '\0')
556 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
557 timed out. TIMEOUT specifies timeout value in seconds.
561 mips_expect_timeout (string
, timeout
)
569 printf_unfiltered ("Expected \"");
570 puts_readable (string
);
571 printf_unfiltered ("\", got \"");
579 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
580 were waiting for the mips_monitor_prompt... */
582 c
= SERIAL_READCHAR (mips_desc
, timeout
);
584 if (c
== SERIAL_TIMEOUT
)
587 printf_unfiltered ("\": FAIL\n");
600 printf_unfiltered ("\": OK\n");
613 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
614 timed out. The timeout value is hard-coded to 2 seconds. Use
615 mips_expect_timeout if a different timeout value is needed.
622 return mips_expect_timeout (string
, 2);
625 /* Read the required number of characters into the given buffer (which
626 is assumed to be large enough). The only failure is a timeout. */
628 mips_getstring (string
, n
)
638 c
= SERIAL_READCHAR (mips_desc
, 2);
640 if (c
== SERIAL_TIMEOUT
) {
641 fprintf_unfiltered (stderr
, "Failed to read %d characters from target (TIMEOUT)\n", n
);
652 /* Read a character from the remote, aborting on error. Returns
653 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
654 returns). FIXME: If we see the string mips_monitor_prompt from
655 the board, then we are debugging on the main console port, and we
656 have somehow dropped out of remote debugging mode. In this case,
657 we automatically go back in to remote debugging mode. This is a
658 hack, put in because I can't find any way for a program running on
659 the remote board to terminate without also ending remote debugging
660 mode. I assume users won't have any trouble with this; for one
661 thing, the IDT documentation generally assumes that the remote
662 debugging port is not the console port. This is, however, very
663 convenient for DejaGnu when you only have one connected serial
667 mips_readchar (timeout
)
671 static int state
= 0;
672 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
674 #ifdef MAINTENANCE_CMDS
679 if (i
== -1 && watchdog
> 0)
684 if (state
== mips_monitor_prompt_len
)
686 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
687 #ifdef MAINTENANCE_CMDS
688 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
690 target_mourn_inferior ();
691 error ("Watchdog has expired. Target detached.\n");
694 if (ch
== SERIAL_EOF
)
695 mips_error ("End of file from remote");
696 if (ch
== SERIAL_ERROR
)
697 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
698 if (remote_debug
> 1)
700 /* Don't use _filtered; we can't deal with a QUIT out of
701 target_wait, and I think this might be called from there. */
702 if (ch
!= SERIAL_TIMEOUT
)
703 printf_unfiltered ("Read '%c' %d 0x%x\n", ch
, ch
, ch
);
705 printf_unfiltered ("Timed out in read\n");
708 /* If we have seen mips_monitor_prompt and we either time out, or
709 we see a @ (which was echoed from a packet we sent), reset the
710 board as described above. The first character in a packet after
711 the SYN (which is not echoed) is always an @ unless the packet is
712 more than 64 characters long, which ours never are. */
713 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
714 && state
== mips_monitor_prompt_len
715 && ! mips_initializing
718 if (remote_debug
> 0)
719 /* Don't use _filtered; we can't deal with a QUIT out of
720 target_wait, and I think this might be called from there. */
721 printf_unfiltered ("Reinitializing MIPS debugging mode\n");
728 /* At this point, about the only thing we can do is abort the command
729 in progress and get back to command level as quickly as possible. */
731 error ("Remote board reset, debug protocol re-initialized.");
734 if (ch
== mips_monitor_prompt
[state
])
742 /* Get a packet header, putting the data in the supplied buffer.
743 PGARBAGE is a pointer to the number of garbage characters received
744 so far. CH is the last character received. Returns 0 for success,
745 or -1 for timeout. */
748 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
758 /* Wait for a SYN. mips_syn_garbage is intended to prevent
759 sitting here indefinitely if the board sends us one garbage
760 character per second. ch may already have a value from the
761 last time through the loop. */
764 ch
= mips_readchar (timeout
);
765 if (ch
== SERIAL_TIMEOUT
)
769 /* Printing the character here lets the user of gdb see
770 what the program is outputting, if the debugging is
771 being done on the console port. Don't use _filtered;
772 we can't deal with a QUIT out of target_wait. */
773 if (! mips_initializing
|| remote_debug
> 0)
776 gdb_flush (gdb_stdout
);
780 if (mips_syn_garbage
> 0
781 && *pgarbage
> mips_syn_garbage
)
782 mips_error ("Debug protocol failure: more than %d characters before a sync.",
787 /* Get the packet header following the SYN. */
788 for (i
= 1; i
< HDR_LENGTH
; i
++)
790 ch
= mips_readchar (timeout
);
791 if (ch
== SERIAL_TIMEOUT
)
793 /* Make sure this is a header byte. */
794 if (ch
== SYN
|| ! HDR_CHECK (ch
))
800 /* If we got the complete header, we can return. Otherwise we
801 loop around and keep looking for SYN. */
807 /* Get a packet header, putting the data in the supplied buffer.
808 PGARBAGE is a pointer to the number of garbage characters received
809 so far. The last character read is returned in *PCH. Returns 0
810 for success, -1 for timeout, -2 for error. */
813 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
822 for (i
= 0; i
< TRLR_LENGTH
; i
++)
824 ch
= mips_readchar (timeout
);
826 if (ch
== SERIAL_TIMEOUT
)
828 if (! TRLR_CHECK (ch
))
835 /* Get the checksum of a packet. HDR points to the packet header.
836 DATA points to the packet data. LEN is the length of DATA. */
839 mips_cksum (hdr
, data
, len
)
840 const unsigned char *hdr
;
841 const unsigned char *data
;
844 register const unsigned char *p
;
850 /* The initial SYN is not included in the checksum. */
864 /* Send a packet containing the given ASCII string. */
867 mips_send_packet (s
, get_ack
)
871 /* unsigned */ int len
;
872 unsigned char *packet
;
877 if (len
> DATA_MAXLEN
)
878 mips_error ("MIPS protocol data packet too long: %s", s
);
880 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
882 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
883 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
884 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
885 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
887 memcpy (packet
+ HDR_LENGTH
, s
, len
);
889 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
890 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
891 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
892 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
894 /* Increment the sequence number. This will set mips_send_seq to
895 the sequence number we expect in the acknowledgement. */
896 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
898 /* We can only have one outstanding data packet, so we just wait for
899 the acknowledgement here. Keep retransmitting the packet until
900 we get one, or until we've tried too many times. */
901 for (try = 0; try < mips_send_retries
; try++)
906 if (remote_debug
> 0)
908 /* Don't use _filtered; we can't deal with a QUIT out of
909 target_wait, and I think this might be called from there. */
910 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
911 printf_unfiltered ("Writing \"%s\"\n", packet
+ 1);
914 if (SERIAL_WRITE (mips_desc
, packet
,
915 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
916 mips_error ("write to target failed: %s", safe_strerror (errno
));
925 unsigned char hdr
[HDR_LENGTH
+ 1];
926 unsigned char trlr
[TRLR_LENGTH
+ 1];
930 /* Get the packet header. If we time out, resend the data
932 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
938 /* If we get a data packet, assume it is a duplicate and
939 ignore it. FIXME: If the acknowledgement is lost, this
940 data packet may be the packet the remote sends after the
942 if (HDR_IS_DATA (hdr
)) {
945 /* Ignore any errors raised whilst attempting to ignore
948 len
= HDR_GET_LEN (hdr
);
950 for (i
= 0; i
< len
; i
++)
954 rch
= mips_readchar (2);
960 if (rch
== SERIAL_TIMEOUT
)
962 /* ignore the character */
966 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
968 /* We don't bother checking the checksum, or providing an
969 ACK to the packet. */
973 /* If the length is not 0, this is a garbled packet. */
974 if (HDR_GET_LEN (hdr
) != 0)
977 /* Get the packet trailer. */
978 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
979 mips_retransmit_wait
);
981 /* If we timed out, resend the data packet. */
985 /* If we got a bad character, reread the header. */
989 /* If the checksum does not match the trailer checksum, this
990 is a bad packet; ignore it. */
991 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
992 != TRLR_GET_CKSUM (trlr
))
995 if (remote_debug
> 0)
997 hdr
[HDR_LENGTH
] = '\0';
998 trlr
[TRLR_LENGTH
] = '\0';
999 /* Don't use _filtered; we can't deal with a QUIT out of
1000 target_wait, and I think this might be called from there. */
1001 printf_unfiltered ("Got ack %d \"%s%s\"\n",
1002 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
1005 /* If this ack is for the current packet, we're done. */
1006 seq
= HDR_GET_SEQ (hdr
);
1007 if (seq
== mips_send_seq
)
1010 /* If this ack is for the last packet, resend the current
1012 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1015 /* Otherwise this is a bad ack; ignore it. Increment the
1016 garbage count to ensure that we do not stay in this loop
1022 mips_error ("Remote did not acknowledge packet");
1025 /* Receive and acknowledge a packet, returning the data in BUFF (which
1026 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1027 implies that only the sender retransmits packets, so this code just
1028 waits silently for a packet. It returns the length of the received
1029 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1030 don't print an error message and return -1. */
1033 mips_receive_packet (buff
, throw_error
, timeout
)
1041 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1048 unsigned char hdr
[HDR_LENGTH
];
1049 unsigned char trlr
[TRLR_LENGTH
];
1053 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1056 mips_error ("Timed out waiting for remote packet");
1063 /* An acknowledgement is probably a duplicate; ignore it. */
1064 if (! HDR_IS_DATA (hdr
))
1066 len
= HDR_GET_LEN (hdr
);
1067 /* Check if the length is valid for an ACK, we may aswell
1068 try and read the remainder of the packet: */
1071 /* Ignore the error condition, since we are going to
1072 ignore the packet anyway. */
1073 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1075 /* Don't use _filtered; we can't deal with a QUIT out of
1076 target_wait, and I think this might be called from there. */
1077 if (remote_debug
> 0)
1078 printf_unfiltered ("Ignoring unexpected ACK\n");
1082 len
= HDR_GET_LEN (hdr
);
1083 for (i
= 0; i
< len
; i
++)
1087 rch
= mips_readchar (timeout
);
1093 if (rch
== SERIAL_TIMEOUT
)
1096 mips_error ("Timed out waiting for remote packet");
1105 /* Don't use _filtered; we can't deal with a QUIT out of
1106 target_wait, and I think this might be called from there. */
1107 if (remote_debug
> 0)
1108 printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n",
1113 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1117 mips_error ("Timed out waiting for packet");
1123 /* Don't use _filtered; we can't deal with a QUIT out of
1124 target_wait, and I think this might be called from there. */
1125 if (remote_debug
> 0)
1126 printf_unfiltered ("Got SYN when wanted trailer\n");
1130 /* If this is the wrong sequence number, ignore it. */
1131 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
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 printf_unfiltered ("Ignoring sequence number %d (want %d)\n",
1137 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1141 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1144 if (remote_debug
> 0)
1145 /* Don't use _filtered; we can't deal with a QUIT out of
1146 target_wait, and I think this might be called from there. */
1147 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1148 mips_cksum (hdr
, buff
, len
),
1149 TRLR_GET_CKSUM (trlr
));
1151 /* The checksum failed. Send an acknowledgement for the
1152 previous packet to tell the remote to resend the packet. */
1153 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1154 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1155 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1156 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1158 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1160 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1161 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1162 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1164 if (remote_debug
> 0)
1166 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1167 /* Don't use _filtered; we can't deal with a QUIT out of
1168 target_wait, and I think this might be called from there. */
1169 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1173 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1176 mips_error ("write to target failed: %s", safe_strerror (errno
));
1182 if (remote_debug
> 0)
1185 /* Don't use _filtered; we can't deal with a QUIT out of
1186 target_wait, and I think this might be called from there. */
1187 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1190 /* We got the packet. Send an acknowledgement. */
1191 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1193 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1194 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1195 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1196 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1198 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1200 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1201 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1202 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1204 if (remote_debug
> 0)
1206 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1207 /* Don't use _filtered; we can't deal with a QUIT out of
1208 target_wait, and I think this might be called from there. */
1209 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1213 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1216 mips_error ("write to target failed: %s", safe_strerror (errno
));
1224 /* Optionally send a request to the remote system and optionally wait
1225 for the reply. This implements the remote debugging protocol,
1226 which is built on top of the packet protocol defined above. Each
1227 request has an ADDR argument and a DATA argument. The following
1228 requests are defined:
1230 \0 don't send a request; just wait for a reply
1231 i read word from instruction space at ADDR
1232 d read word from data space at ADDR
1233 I write DATA to instruction space at ADDR
1234 D write DATA to data space at ADDR
1235 r read register number ADDR
1236 R set register number ADDR to value DATA
1237 c continue execution (if ADDR != 1, set pc to ADDR)
1238 s single step (if ADDR != 1, set pc to ADDR)
1240 The read requests return the value requested. The write requests
1241 return the previous value in the changed location. The execution
1242 requests return a UNIX wait value (the approximate signal which
1243 caused execution to stop is in the upper eight bits).
1245 If PERR is not NULL, this function waits for a reply. If an error
1246 occurs, it sets *PERR to 1 and sets errno according to what the
1247 target board reports. */
1250 mips_request (cmd
, addr
, data
, perr
, timeout
, buff
)
1258 char myBuff
[DATA_MAXLEN
+ 1];
1265 if (buff
== (char *) NULL
)
1270 if (mips_need_reply
)
1271 fatal ("mips_request: Trying to send command before reply");
1272 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1273 mips_send_packet (buff
, 1);
1274 mips_need_reply
= 1;
1277 if (perr
== (int *) NULL
)
1280 if (! mips_need_reply
)
1281 fatal ("mips_request: Trying to get reply before command");
1283 mips_need_reply
= 0;
1285 len
= mips_receive_packet (buff
, 1, timeout
);
1288 if (sscanf (buff
, "0x%x %c 0x%x 0x%x",
1289 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1290 || (cmd
!= '\0' && rcmd
!= cmd
))
1291 mips_error ("Bad response from remote board");
1297 /* FIXME: This will returns MIPS errno numbers, which may or may
1298 not be the same as errno values used on other systems. If
1299 they stick to common errno values, they will be the same, but
1300 if they don't, they must be translated. */
1311 mips_initialize_cleanups (arg
)
1314 mips_initializing
= 0;
1318 mips_exit_cleanups (arg
)
1325 mips_send_command (cmd
, prompt
)
1329 SERIAL_WRITE (mips_desc
, cmd
, strlen(cmd
));
1333 mips_expect (mips_monitor_prompt
);
1336 /* Enter remote (dbx) debug mode: */
1340 /* Reset the sequence numbers, ready for the new debug sequence: */
1342 mips_receive_seq
= 0;
1344 if (mips_monitor
!= MON_IDT
)
1345 mips_send_command ("debug\r", 0);
1346 else /* assume IDT monitor by default */
1347 mips_send_command ("db tty0\r", 0);
1349 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1351 /* We don't need to absorb any spurious characters here, since the
1352 mips_receive_header will eat up a reasonable number of characters
1353 whilst looking for the SYN, however this avoids the "garbage"
1354 being displayed to the user. */
1355 if (mips_monitor
!= MON_IDT
)
1359 char buff
[DATA_MAXLEN
+ 1];
1360 if (mips_receive_packet (buff
, 1, 3) < 0)
1361 mips_error ("Failed to initialize (didn't receive packet).");
1365 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1370 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1374 if (mips_monitor
!= MON_IDT
)
1376 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1377 so we do not get a reply to this command: */
1378 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL
,
1379 mips_receive_wait
, NULL
);
1380 mips_need_reply
= 0;
1381 if (!mips_expect (" break!"))
1385 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err
,
1386 mips_receive_wait
, NULL
);
1388 if (mips_monitor
== MON_IDT
&& !mips_expect ("Exiting remote debug"))
1391 if (mips_monitor
== MON_DDB
)
1393 if (!mips_expect ("\n"))
1397 if (!mips_expect ("\r\n"))
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 (BREAK_UNUSED
, -1, 0) == 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
, (char *) 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 ("*");
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 (stderr
, "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2384 mips_expect (" = ");
2386 /* Lead in the hex number we are expecting: */
2390 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2391 which targets return 64-bit addresses? PMON returns only 32! */
2392 if (!mips_getstring (&tbuff
[2], 8))
2394 tbuff
[10] = '\0'; /* terminate the string */
2396 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2398 fprintf_unfiltered (stderr
, "Invalid hex address from target: %s\n", tbuff
);
2402 if (bpnum
>= PMON_MAX_BP
)
2404 fprintf_unfiltered (stderr
, "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2405 bpnum
, PMON_MAX_BP
- 1);
2410 fprintf_unfiltered (stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2412 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2414 mips_expect ("\r\n");
2415 mips_expect (mips_monitor_prompt
);
2417 mips_enter_debug ();
2422 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2426 pmon_remove_breakpoint (addr
, contents_cache
)
2428 char *contents_cache
;
2430 if (monitor_supports_breakpoints
)
2433 char tbuff
[7]; /* enough for delete breakpoint command */
2435 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2436 if (mips_pmon_bp_info
[bpnum
] == addr
)
2439 if (bpnum
>= PMON_MAX_BP
)
2441 fprintf_unfiltered (stderr
,
2442 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2447 if (mips_exit_debug ())
2448 mips_error ("Failed to exit debug mode");
2450 sprintf (tbuff
, "db %02d\r", bpnum
);
2452 mips_send_command (tbuff
, -1);
2453 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2454 set" message will be returned. */
2456 mips_enter_debug ();
2461 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2466 /* Tell whether this target can support a hardware breakpoint. CNT
2467 is the number of hardware breakpoints already installed. This
2468 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2471 remote_mips_can_use_hardware_watchpoint (cnt
)
2474 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2478 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2479 This is used for memory ref breakpoints. */
2481 static unsigned long
2482 calculate_mask (addr
, len
)
2489 mask
= addr
^ (addr
+ len
- 1);
2491 for (i
= 32; i
>= 0; i
--)
2497 mask
= (unsigned long) 0xffffffff >> i
;
2502 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2503 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2507 remote_mips_set_watchpoint (addr
, len
, type
)
2512 if (set_breakpoint (addr
, len
, type
))
2519 remote_mips_remove_watchpoint (addr
, len
, type
)
2524 if (clear_breakpoint (addr
, len
, type
))
2531 remote_mips_stopped_by_watchpoint ()
2533 return hit_watchpoint
;
2537 /* Insert a breakpoint. */
2540 set_breakpoint (addr
, len
, type
)
2543 enum break_type type
;
2545 return common_breakpoint (1, addr
, len
, type
);
2549 /* Clear a breakpoint. */
2552 clear_breakpoint (addr
, len
, type
)
2555 enum break_type type
;
2557 return common_breakpoint (0, addr
, len
, type
);
2561 /* Check the error code from the return packet for an LSI breakpoint
2562 command. If there's no error, just return 0. If it's a warning,
2563 print the warning text and return 0. If it's an error, print
2564 the error text and return 1. <ADDR> is the address of the breakpoint
2565 that was being set. <RERRFLG> is the error code returned by PMON.
2566 This is a helper function for common_breakpoint. */
2569 check_lsi_error (addr
, rerrflg
)
2573 struct lsi_error
*err
;
2574 char *saddr
= paddr_nz (addr
); /* printable address string */
2576 if (rerrflg
== 0) /* no error */
2579 /* Warnings can be ORed together, so check them all. */
2580 if (rerrflg
& W_WARN
)
2582 if (monitor_warnings
)
2585 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2587 if ((err
->code
& rerrflg
) == err
->code
)
2590 fprintf_unfiltered (stderr
,
2591 "common_breakpoint (0x%s): Warning: %s\n",
2597 fprintf_unfiltered (stderr
,
2598 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2605 /* Errors are unique, i.e. can't be ORed together. */
2606 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2608 if ((err
->code
& rerrflg
) == err
->code
)
2610 fprintf_unfiltered (stderr
,
2611 "common_breakpoint (0x%s): Error: %s\n",
2617 fprintf_unfiltered (stderr
,
2618 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2625 /* This routine sends a breakpoint command to the remote target.
2627 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2628 <ADDR> is the address of the breakpoint.
2629 <LEN> the length of the region to break on.
2630 <TYPE> is the type of breakpoint:
2631 0 = write (BREAK_WRITE)
2632 1 = read (BREAK_READ)
2633 2 = read/write (BREAK_ACCESS)
2634 3 = instruction fetch (BREAK_FETCH)
2636 Return 0 if successful; otherwise 1. */
2639 common_breakpoint (set
, addr
, len
, type
)
2643 enum break_type type
;
2645 char buf
[DATA_MAXLEN
+ 1];
2647 int rpid
, rerrflg
, rresponse
, rlen
;
2650 addr
= ADDR_BITS_REMOVE (addr
);
2652 if (mips_monitor
== MON_LSI
)
2654 if (set
== 0) /* clear breakpoint */
2656 /* The LSI PMON "clear breakpoint" has this form:
2657 <pid> 'b' <bptn> 0x0
2659 <pid> 'b' 0x0 <code>
2661 <bptn> is a breakpoint number returned by an earlier 'B' command.
2662 Possible return codes: OK, E_BPT. */
2666 /* Search for the breakpoint in the table. */
2667 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2668 if (lsi_breakpoints
[i
].type
== type
2669 && lsi_breakpoints
[i
].addr
== addr
2670 && lsi_breakpoints
[i
].len
== len
)
2673 /* Clear the table entry and tell PMON to clear the breakpoint. */
2674 if (i
== MAX_LSI_BREAKPOINTS
)
2676 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2681 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2682 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2683 mips_send_packet (buf
, 1);
2685 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2688 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2690 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2692 return (check_lsi_error (addr
, rerrflg
));
2694 else /* set a breakpoint */
2696 /* The LSI PMON "set breakpoint" command has this form:
2697 <pid> 'B' <addr> 0x0
2699 <pid> 'B' <bptn> <code>
2701 The "set data breakpoint" command has this form:
2703 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2705 where: type= "0x1" = read
2707 "0x3" = access (read or write)
2709 The reply returns two values:
2710 bptn - a breakpoint number, which is a small integer with
2711 possible values of zero through 255.
2712 code - an error return code, a value of zero indicates a
2713 succesful completion, other values indicate various
2714 errors and warnings.
2716 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2720 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2723 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2725 else /* watchpoint */
2728 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2729 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2730 paddr_nz (addr
+ len
- 1));
2732 mips_send_packet (buf
, 1);
2734 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2737 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2738 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2739 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2740 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2743 if (check_lsi_error (addr
, rerrflg
))
2746 /* rresponse contains PMON's breakpoint number. Record the
2747 information for this breakpoint so we can clear it later. */
2748 lsi_breakpoints
[rresponse
].type
= type
;
2749 lsi_breakpoints
[rresponse
].addr
= addr
;
2750 lsi_breakpoints
[rresponse
].len
= len
;
2757 /* On non-LSI targets, the breakpoint command has this form:
2758 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2759 <MASK> is a don't care mask for addresses.
2760 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2764 mask
= calculate_mask (addr
, len
);
2767 if (set
) /* set a breakpoint */
2772 case BREAK_WRITE
: /* write */
2775 case BREAK_READ
: /* read */
2778 case BREAK_ACCESS
: /* read/write */
2786 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2787 paddr_nz (mask
), flags
);
2792 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2795 mips_send_packet (buf
, 1);
2797 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2800 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2801 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2803 if (nfields
!= 4 || rcmd
!= cmd
)
2804 mips_error ("common_breakpoint: Bad response from remote board: %s",
2809 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2810 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2811 if (mips_monitor
== MON_DDB
)
2812 rresponse
= rerrflg
;
2813 if (rresponse
!= 22) /* invalid argument */
2814 fprintf_unfiltered (stderr
, "common_breakpoint (0x%s): Got error: 0x%x\n",
2815 paddr_nz (addr
), rresponse
);
2823 send_srec (srec
, len
, addr
)
2832 SERIAL_WRITE (mips_desc
, srec
, len
);
2834 ch
= mips_readchar (2);
2838 case SERIAL_TIMEOUT
:
2839 error ("Timeout during download.");
2843 case 0x15: /* NACK */
2844 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %d! Retrying.\n", addr
);
2847 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2852 /* Download a binary file by converting it to S records. */
2855 mips_load_srec (args
)
2860 char *buffer
, srec
[1024];
2862 unsigned int srec_frame
= 200;
2864 static int hashmark
= 1;
2866 buffer
= alloca (srec_frame
* 2 + 256);
2868 abfd
= bfd_openr (args
, 0);
2871 printf_filtered ("Unable to open file %s\n", args
);
2875 if (bfd_check_format (abfd
, bfd_object
) == 0)
2877 printf_filtered ("File is not an object file\n");
2881 /* This actually causes a download in the IDT binary format: */
2882 mips_send_command (LOAD_CMD
, 0);
2884 for (s
= abfd
->sections
; s
; s
= s
->next
)
2886 if (s
->flags
& SEC_LOAD
)
2888 unsigned int numbytes
;
2890 /* FIXME! vma too small?? */
2891 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
,
2892 s
->vma
+ s
->_raw_size
);
2893 gdb_flush (gdb_stdout
);
2895 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2897 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2899 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2901 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2902 send_srec (srec
, reclen
, s
->vma
+ i
);
2906 putchar_unfiltered ('#');
2907 gdb_flush (gdb_stdout
);
2910 } /* Per-packet (or S-record) loop */
2912 putchar_unfiltered ('\n');
2913 } /* Loadable sections */
2916 putchar_unfiltered ('\n');
2918 /* Write a type 7 terminator record. no data for a type 7, and there
2919 is no data, so len is 0. */
2921 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2923 send_srec (srec
, reclen
, abfd
->start_address
);
2925 SERIAL_FLUSH_INPUT (mips_desc
);
2929 * mips_make_srec -- make an srecord. This writes each line, one at a
2930 * time, each with it's own header and trailer line.
2931 * An srecord looks like this:
2933 * byte count-+ address
2934 * start ---+ | | data +- checksum
2936 * S01000006F6B692D746573742E73726563E4
2937 * S315000448600000000000000000FC00005900000000E9
2938 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2939 * S30B0004485A0000000000004E
2942 * S<type><length><address><data><checksum>
2946 * is the number of bytes following upto the checksum. Note that
2947 * this is not the number of chars following, since it takes two
2948 * chars to represent a byte.
2952 * 1) two byte address data record
2953 * 2) three byte address data record
2954 * 3) four byte address data record
2955 * 7) four byte address termination record
2956 * 8) three byte address termination record
2957 * 9) two byte address termination record
2960 * is the start address of the data following, or in the case of
2961 * a termination record, the start address of the image
2965 * is the sum of all the raw byte data in the record, from the length
2966 * upwards, modulo 256 and subtracted from 255.
2968 * This routine returns the length of the S-record.
2973 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
2977 unsigned char *myaddr
;
2980 unsigned char checksum
;
2983 /* Create the header for the srec. addr_size is the number of bytes in the address,
2984 and 1 is the number of bytes in the count. */
2986 /* FIXME!! bigger buf required for 64-bit! */
2989 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2990 /* This assumes S3 style downloads (4byte addresses). There should
2991 probably be a check, or the code changed to make it more
2993 buf
[3] = memaddr
>> 24;
2994 buf
[4] = memaddr
>> 16;
2995 buf
[5] = memaddr
>> 8;
2997 memcpy (&buf
[7], myaddr
, len
);
2999 /* Note that the checksum is calculated on the raw data, not the
3000 hexified data. It includes the length, address and the data
3001 portions of the packet. */
3003 buf
+= 2; /* Point at length byte */
3004 for (i
= 0; i
< len
+ 4 + 1; i
++)
3012 /* The following manifest controls whether we enable the simple flow
3013 control support provided by the monitor. If enabled the code will
3014 wait for an affirmative ACK between transmitting packets. */
3015 #define DOETXACK (1)
3017 /* The PMON fast-download uses an encoded packet format constructed of
3018 3byte data packets (encoded as 4 printable ASCII characters), and
3019 escape sequences (preceded by a '/'):
3022 'C' compare checksum (12bit value, not included in checksum calculation)
3023 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3024 'Z' zero fill multiple of 3bytes
3025 'B' byte (12bit encoded value, of 8bit data)
3026 'A' address (36bit encoded value)
3027 'E' define entry as original address, and exit load
3029 The packets are processed in 4 character chunks, so the escape
3030 sequences that do not have any data (or variable length data)
3031 should be padded to a 4 character boundary. The decoder will give
3032 an error if the complete message block size is not a multiple of
3033 4bytes (size of record).
3035 The encoding of numbers is done in 6bit fields. The 6bit value is
3036 used to index into this string to get the specific character
3037 encoding for the value: */
3038 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3040 /* Convert the number of bits required into an encoded number, 6bits
3041 at a time (range 0..63). Keep a checksum if required (passed
3042 pointer non-NULL). The function returns the number of encoded
3043 characters written into the buffer. */
3045 pmon_makeb64 (v
, p
, n
, chksum
)
3051 int count
= (n
/ 6);
3053 if ((n
% 12) != 0) {
3054 fprintf_unfiltered(stderr
,"Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n
,(n
== 1)?"":"s");
3058 fprintf_unfiltered(stderr
,"Fast encoding cannot process more than 36bits at the moment: %dbits\n",n
);
3062 /* Deal with the checksum: */
3063 if (chksum
!= NULL
) {
3065 case 36: *chksum
+= ((v
>> 24) & 0xFFF);
3066 case 24: *chksum
+= ((v
>> 12) & 0xFFF);
3067 case 12: *chksum
+= ((v
>> 0) & 0xFFF);
3073 *p
++ = encoding
[(v
>> n
) & 0x3F];
3079 /* Shorthand function (that could be in-lined) to output the zero-fill
3080 escape sequence into the data stream. */
3082 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3086 unsigned int *chksum
;
3090 sprintf(*buff
,"/Z");
3091 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3092 *buff
+= (count
+ 2);
3094 return(recsize
+ count
+ 2);
3098 pmon_checkset (recsize
, buff
, value
)
3105 /* Add the checksum (without updating the value): */
3106 sprintf (*buff
, "/C");
3107 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3108 *buff
+= (count
+ 2);
3109 sprintf (*buff
, "\n");
3110 *buff
+= 2; /* include zero terminator */
3111 /* Forcing a checksum validation clears the sum: */
3113 return(recsize
+ count
+ 3);
3116 /* Amount of padding we leave after at the end of the output buffer,
3117 for the checksum and line termination characters: */
3118 #define CHECKSIZE (4 + 4 + 4 + 2)
3119 /* zero-fill, checksum, transfer end and line termination space. */
3121 /* The amount of binary data loaded from the object file in a single
3123 #define BINCHUNK (1024)
3125 /* Maximum line of data accepted by the monitor: */
3126 #define MAXRECSIZE (550)
3127 /* NOTE: This constant depends on the monitor being used. This value
3128 is for PMON 5.x on the Cogent Vr4300 board. */
3131 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3133 unsigned char *inbuf
;
3138 unsigned int *zerofill
;
3143 /* This is a simple check to ensure that our data will fit within
3144 the maximum allowable record size. Each record output is 4bytes
3145 in length. We must allow space for a pending zero fill command,
3146 the record, and a checksum record. */
3147 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0)) {
3148 /* Process the binary data: */
3149 if ((inamount
- *inptr
) < 3) {
3151 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3153 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3155 *recsize
+= (2 + count
);
3158 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3159 /* Simple check for zero data. TODO: A better check would be
3160 to check the last, and then the middle byte for being zero
3161 (if the first byte is not). We could then check for
3162 following runs of zeros, and if above a certain size it is
3163 worth the 4 or 8 character hit of the byte insertions used
3164 to pad to the start of the zeroes. NOTE: This also depends
3165 on the alignment at the end of the zero run. */
3166 if (value
== 0x00000000) {
3168 if (*zerofill
== 0xFFF) /* 12bit counter */
3169 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3172 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3173 count
= pmon_makeb64 (value
, p
, 24, csum
);
3186 pmon_check_ack(mesg
)
3189 #if defined(DOETXACK)
3194 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3195 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3197 fprintf_unfiltered (gdb_stderr
,
3198 "Failed to receive valid ACK for %s\n", mesg
);
3199 return(-1); /* terminate the download */
3202 #endif /* DOETXACK */
3206 /* pmon_download - Send a sequence of characters to the PMON download port,
3207 which is either a serial port or a UDP socket. */
3210 pmon_start_download ()
3214 /* Create the temporary download file. */
3215 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3216 perror_with_name (tftp_localname
);
3220 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3221 mips_expect ("Downloading from ");
3222 mips_expect (udp_in_use
? "udp" : "tty0");
3223 mips_expect (", ^C to abort\r\n");
3228 mips_expect_download (char *string
)
3230 if (!mips_expect (string
))
3232 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3234 remove (tftp_localname
); /* Remove temporary file */
3242 pmon_end_download (final
, bintotal
)
3246 char hexnumber
[9]; /* includes '\0' space */
3250 static char *load_cmd_prefix
= "load -b -s ";
3254 /* Close off the temporary file containing the load data. */
3258 /* Make the temporary file readable by the world. */
3259 if (stat (tftp_localname
, &stbuf
) == 0)
3260 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3262 /* Must reinitialize the board to prevent PMON from crashing. */
3263 mips_send_command ("initEther\r", -1);
3265 /* Send the load command. */
3266 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3267 strcpy (cmd
, load_cmd_prefix
);
3268 strcat (cmd
, tftp_name
);
3270 mips_send_command (cmd
, 0);
3272 if (!mips_expect_download ("Downloading from "))
3274 if (!mips_expect_download (tftp_name
))
3276 if (!mips_expect_download (", ^C to abort\r\n"))
3280 /* Wait for the stuff that PMON prints after the load has completed.
3281 The timeout value for use in the tftp case (15 seconds) was picked
3282 arbitrarily but might be too small for really large downloads. FIXME. */
3283 if (mips_monitor
== MON_LSI
)
3285 pmon_check_ack ("termination");
3286 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3289 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3291 sprintf (hexnumber
,"%x",final
);
3292 mips_expect (hexnumber
);
3293 mips_expect ("\r\n");
3294 if (mips_monitor
!= MON_LSI
)
3295 pmon_check_ack ("termination");
3296 mips_expect ("\r\ntotal = 0x");
3297 sprintf (hexnumber
,"%x",bintotal
);
3298 mips_expect (hexnumber
);
3299 if (!mips_expect_download (" bytes\r\n"))
3303 remove (tftp_localname
); /* Remove temporary file */
3307 pmon_download (buffer
, length
)
3312 fwrite (buffer
, 1, length
, tftp_file
);
3314 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3318 pmon_load_fast (file
)
3323 unsigned char *binbuf
;
3326 unsigned int csum
= 0;
3327 int hashmark
= !tftp_in_use
;
3332 buffer
= (char *)xmalloc(MAXRECSIZE
+ 1);
3333 binbuf
= (unsigned char *)xmalloc(BINCHUNK
);
3335 abfd
= bfd_openr(file
,0);
3338 printf_filtered ("Unable to open file %s\n",file
);
3342 if (bfd_check_format(abfd
,bfd_object
) == 0)
3344 printf_filtered("File is not an object file\n");
3348 /* Setup the required download state: */
3349 mips_send_command ("set dlproto etxack\r", -1);
3350 mips_send_command ("set dlecho off\r", -1);
3351 /* NOTE: We get a "cannot set variable" message if the variable is
3352 already defined to have the argument we give. The code doesn't
3353 care, since it just scans to the next prompt anyway. */
3354 /* Start the download: */
3355 pmon_start_download();
3357 /* Zero the checksum */
3358 sprintf(buffer
,"/Kxx\n");
3359 reclen
= strlen(buffer
);
3360 pmon_download (buffer
, reclen
);
3361 finished
= pmon_check_ack("/Kxx");
3363 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3364 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3366 bintotal
+= s
->_raw_size
;
3367 final
= (s
->vma
+ s
->_raw_size
);
3369 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int)s
->vma
,
3370 (unsigned int)(s
->vma
+ s
->_raw_size
));
3371 gdb_flush (gdb_stdout
);
3373 /* Output the starting address */
3374 sprintf(buffer
,"/A");
3375 reclen
= pmon_makeb64(s
->vma
,&buffer
[2],36,&csum
);
3376 buffer
[2 + reclen
] = '\n';
3377 buffer
[3 + reclen
] = '\0';
3378 reclen
+= 3; /* for the initial escape code and carriage return */
3379 pmon_download (buffer
, reclen
);
3380 finished
= pmon_check_ack("/A");
3384 unsigned int binamount
;
3385 unsigned int zerofill
= 0;
3391 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
) {
3394 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3396 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3398 /* This keeps a rolling checksum, until we decide to output
3400 for (; ((binamount
- binptr
) > 0);) {
3401 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3402 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
)) {
3403 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3404 pmon_download (buffer
, reclen
);
3405 finished
= pmon_check_ack("data record");
3407 zerofill
= 0; /* do not transmit pending zerofills */
3412 putchar_unfiltered ('#');
3413 gdb_flush (gdb_stdout
);
3417 reclen
= 0; /* buffer processed */
3422 /* Ensure no out-standing zerofill requests: */
3424 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3426 /* and then flush the line: */
3428 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3429 /* Currently pmon_checkset outputs the line terminator by
3430 default, so we write out the buffer so far: */
3431 pmon_download (buffer
, reclen
);
3432 finished
= pmon_check_ack("record remnant");
3436 putchar_unfiltered ('\n');
3439 /* Terminate the transfer. We know that we have an empty output
3440 buffer at this point. */
3441 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3442 reclen
= strlen (buffer
);
3443 pmon_download (buffer
, reclen
);
3445 if (finished
) { /* Ignore the termination message: */
3446 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3447 } else { /* Deal with termination message: */
3448 pmon_end_download (final
, bintotal
);
3454 /* mips_load -- download a file. */
3457 mips_load (file
, from_tty
)
3461 /* Get the board out of remote debugging mode. */
3462 if (mips_exit_debug ())
3463 error ("mips_load: Couldn't get into monitor mode.");
3465 if (mips_monitor
!= MON_IDT
)
3466 pmon_load_fast (file
);
3468 mips_load_srec (file
);
3472 /* Finally, make the PC point at the start address */
3473 if (mips_monitor
!= MON_IDT
)
3475 /* Work around problem where PMON monitor updates the PC after a load
3476 to a different value than GDB thinks it has. The following ensures
3477 that the write_pc() WILL update the PC value: */
3478 register_valid
[PC_REGNUM
] = 0;
3481 write_pc (bfd_get_start_address (exec_bfd
));
3483 inferior_pid
= 0; /* No process now */
3485 /* This is necessary because many things were based on the PC at the time that
3486 we attached to the monitor, which is no longer valid now that we have loaded
3487 new code (and just changed the PC). Another way to do this might be to call
3488 normal_stop, except that the stack may not be valid, and things would get
3489 horribly confused... */
3491 clear_symtab_users ();
3495 /* Pass the command argument as a packet to PMON verbatim. */
3498 pmon_command (args
, from_tty
)
3502 char buf
[DATA_MAXLEN
+ 1];
3505 sprintf (buf
, "0x0 %s", args
);
3506 mips_send_packet (buf
, 1);
3507 printf_filtered ("Send packet: %s\n", buf
);
3509 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3511 printf_filtered ("Received packet: %s\n", buf
);
3515 _initialize_remote_mips ()
3517 /* Initialize the fields in mips_ops that are common to all four targets. */
3518 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3519 mips_ops
.to_close
= mips_close
;
3520 mips_ops
.to_detach
= mips_detach
;
3521 mips_ops
.to_resume
= mips_resume
;
3522 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3523 mips_ops
.to_store_registers
= mips_store_registers
;
3524 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3525 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3526 mips_ops
.to_files_info
= mips_files_info
;
3527 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3528 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3529 mips_ops
.to_kill
= mips_kill
;
3530 mips_ops
.to_load
= mips_load
;
3531 mips_ops
.to_create_inferior
= mips_create_inferior
;
3532 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3533 mips_ops
.to_stratum
= process_stratum
;
3534 mips_ops
.to_has_all_memory
= 1;
3535 mips_ops
.to_has_memory
= 1;
3536 mips_ops
.to_has_stack
= 1;
3537 mips_ops
.to_has_registers
= 1;
3538 mips_ops
.to_has_execution
= 1;
3539 mips_ops
.to_magic
= OPS_MAGIC
;
3541 /* Copy the common fields to all four target vectors. */
3542 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3544 /* Initialize target-specific fields in the target vectors. */
3545 mips_ops
.to_shortname
= "mips";
3546 mips_ops
.to_doc
= "\
3547 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3548 The argument is the device it is connected to or, if it contains a colon,\n\
3549 HOST:PORT to access a board over a network";
3550 mips_ops
.to_open
= mips_open
;
3551 mips_ops
.to_wait
= mips_wait
;
3553 pmon_ops
.to_shortname
= "pmon";
3554 pmon_ops
.to_doc
= "\
3555 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3556 line. The argument is the device it is connected to or, if it contains a\n\
3557 colon, HOST:PORT to access a board over a network";
3558 pmon_ops
.to_open
= pmon_open
;
3559 pmon_ops
.to_wait
= mips_wait
;
3561 ddb_ops
.to_shortname
= "ddb";
3563 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3564 line. The first argument is the device it is connected to or, if it contains\n\
3565 a colon, HOST:PORT to access a board over a network. The optional second\n\
3566 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3567 TFTP downloads to the board. The optional third parameter is the local\n\
3568 of the TFTP temporary file, if it differs from the filename seen by the board";
3569 ddb_ops
.to_open
= ddb_open
;
3570 ddb_ops
.to_wait
= mips_wait
;
3572 lsi_ops
.to_shortname
= "lsi";
3573 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3574 lsi_ops
.to_open
= lsi_open
;
3575 lsi_ops
.to_wait
= mips_wait
;
3577 /* Add the targets. */
3578 add_target (&mips_ops
);
3579 add_target (&pmon_ops
);
3580 add_target (&ddb_ops
);
3581 add_target (&lsi_ops
);
3584 add_set_cmd ("timeout", no_class
, var_zinteger
,
3585 (char *) &mips_receive_wait
,
3586 "Set timeout in seconds for remote MIPS serial I/O.",
3591 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3592 (char *) &mips_retransmit_wait
,
3593 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3594 This is the number of seconds to wait for an acknowledgement to a packet\n\
3595 before resending the packet.", &setlist
),
3599 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3600 (char *) &mips_syn_garbage
,
3601 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3602 This is the maximum number of characters GDB will ignore when trying to\n\
3603 synchronize with the remote system. A value of -1 means that there is no limit\n\
3604 (Note that these characters are printed out even though they are ignored.)",
3609 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3610 (char *) &mips_monitor_prompt
,
3611 "Set the prompt that GDB expects from the monitor.",
3616 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3617 (char *)&monitor_warnings
,
3618 "Set printing of monitor warnings.\n"
3619 "When enabled, monitor warnings about hardware breakpoints "
3620 "will be displayed.",
3624 add_com ("pmon <command>", class_obscure
, pmon_command
,
3625 "Send a packet to PMON (must be in debug mode).");