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
;
171 /* The MIPS remote debugging interface is built on top of a simple
172 packet protocol. Each packet is organized as follows:
174 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
175 may not appear anywhere else in the packet. Any time a SYN is
176 seen, a new packet should be assumed to have begun.
179 This byte contains the upper five bits of the logical length
180 of the data section, plus a single bit indicating whether this
181 is a data packet or an acknowledgement. The documentation
182 indicates that this bit is 1 for a data packet, but the actual
183 board uses 1 for an acknowledgement. The value of the byte is
184 0x40 + (ack ? 0x20 : 0) + (len >> 6)
185 (we always have 0 <= len < 1024). Acknowledgement packets do
186 not carry data, and must have a data length of 0.
188 LEN1 This byte contains the lower six bits of the logical length of
189 the data section. The value is
192 SEQ This byte contains the six bit sequence number of the packet.
195 An acknowlegment packet contains the sequence number of the
196 packet being acknowledged plus 1 modulo 64. Data packets are
197 transmitted in sequence. There may only be one outstanding
198 unacknowledged data packet at a time. The sequence numbers
199 are independent in each direction. If an acknowledgement for
200 the previous packet is received (i.e., an acknowledgement with
201 the sequence number of the packet just sent) the packet just
202 sent should be retransmitted. If no acknowledgement is
203 received within a timeout period, the packet should be
204 retransmitted. This has an unfortunate failure condition on a
205 high-latency line, as a delayed acknowledgement may lead to an
206 endless series of duplicate packets.
208 DATA The actual data bytes follow. The following characters are
209 escaped inline with DLE (ASCII 020, or ^P):
215 The additional DLE characters are not counted in the logical
216 length stored in the TYPE_LEN and LEN1 bytes.
221 These bytes contain an 18 bit checksum of the complete
222 contents of the packet excluding the SEQ byte and the
223 CSUM[123] bytes. The checksum is simply the twos complement
224 addition of all the bytes treated as unsigned characters. The
225 values of the checksum bytes are:
226 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
227 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
228 CSUM3: 0x40 + (cksum & 0x3f)
230 It happens that the MIPS remote debugging protocol always
231 communicates with ASCII strings. Because of this, this
232 implementation doesn't bother to handle the DLE quoting mechanism,
233 since it will never be required. */
236 /* The SYN character which starts each packet. */
239 /* The 0x40 used to offset each packet (this value ensures that all of
240 the header and trailer bytes, other than SYN, are printable ASCII
242 #define HDR_OFFSET 0x40
244 /* The indices of the bytes in the packet header. */
245 #define HDR_INDX_SYN 0
246 #define HDR_INDX_TYPE_LEN 1
247 #define HDR_INDX_LEN1 2
248 #define HDR_INDX_SEQ 3
251 /* The data/ack bit in the TYPE_LEN header byte. */
252 #define TYPE_LEN_DA_BIT 0x20
253 #define TYPE_LEN_DATA 0
254 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
256 /* How to compute the header bytes. */
257 #define HDR_SET_SYN(data, len, seq) (SYN)
258 #define HDR_SET_TYPE_LEN(data, len, seq) \
260 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
261 + (((len) >> 6) & 0x1f))
262 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
263 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
265 /* Check that a header byte is reasonable. */
266 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
268 /* Get data from the header. These macros evaluate their argument
270 #define HDR_IS_DATA(hdr) \
271 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
272 #define HDR_GET_LEN(hdr) \
273 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
274 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
276 /* The maximum data length. */
277 #define DATA_MAXLEN 1023
279 /* The trailer offset. */
280 #define TRLR_OFFSET HDR_OFFSET
282 /* The indices of the bytes in the packet trailer. */
283 #define TRLR_INDX_CSUM1 0
284 #define TRLR_INDX_CSUM2 1
285 #define TRLR_INDX_CSUM3 2
286 #define TRLR_LENGTH 3
288 /* How to compute the trailer bytes. */
289 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
290 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
291 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
293 /* Check that a trailer byte is reasonable. */
294 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
296 /* Get data from the trailer. This evaluates its argument multiple
298 #define TRLR_GET_CKSUM(trlr) \
299 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
300 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
301 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
303 /* The sequence number modulos. */
304 #define SEQ_MODULOS (64)
306 /* PMON commands to load from the serial port or UDP socket. */
307 #define LOAD_CMD "load -b -s tty0\r"
308 #define LOAD_CMD_UDP "load -b -s udp\r"
310 /* The target vectors for the four different remote MIPS targets.
311 These are initialized with code in _initialize_remote_mips instead
312 of static initializers, to make it easier to extend the target_ops
314 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
316 enum mips_monitor_type
{
317 /* IDT/SIM monitor being used: */
319 /* PMON monitor being used: */
320 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
321 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
322 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
323 /* Last and unused value, for sizing vectors, etc. */
326 static enum mips_monitor_type mips_monitor
= MON_LAST
;
328 /* The monitor prompt text. If the user sets the PMON prompt
329 to some new value, the GDB `set monitor-prompt' command must also
330 be used to inform GDB about the expected prompt. Otherwise, GDB
331 will not be able to connect to PMON in mips_initialize().
332 If the `set monitor-prompt' command is not used, the expected
333 default prompt will be set according the target:
340 static char *mips_monitor_prompt
;
342 /* Set to 1 if the target is open. */
343 static int mips_is_open
;
345 /* Currently active target description (if mips_is_open == 1) */
346 static struct target_ops
*current_ops
;
348 /* Set to 1 while the connection is being initialized. */
349 static int mips_initializing
;
351 /* Set to 1 while the connection is being brought down. */
352 static int mips_exiting
;
354 /* The next sequence number to send. */
355 static unsigned int mips_send_seq
;
357 /* The next sequence number we expect to receive. */
358 static unsigned int mips_receive_seq
;
360 /* The time to wait before retransmitting a packet, in seconds. */
361 static int mips_retransmit_wait
= 3;
363 /* The number of times to try retransmitting a packet before giving up. */
364 static int mips_send_retries
= 10;
366 /* The number of garbage characters to accept when looking for an
367 SYN for the next packet. */
368 static int mips_syn_garbage
= 1050;
370 /* The time to wait for a packet, in seconds. */
371 static int mips_receive_wait
= 5;
373 /* Set if we have sent a packet to the board but have not yet received
375 static int mips_need_reply
= 0;
377 /* Handle used to access serial I/O stream. */
378 static serial_t mips_desc
;
380 /* UDP handle used to download files to target. */
381 static serial_t udp_desc
;
382 static int udp_in_use
;
384 /* TFTP filename used to download files to DDB board, in the form
386 static char *tftp_name
; /* host:filename */
387 static char *tftp_localname
; /* filename portion of above */
388 static int tftp_in_use
;
389 static FILE *tftp_file
;
391 /* Counts the number of times the user tried to interrupt the target (usually
393 static int interrupt_count
;
395 /* If non-zero, means that the target is running. */
396 static int mips_wait_flag
= 0;
398 /* If non-zero, monitor supports breakpoint commands. */
399 static monitor_supports_breakpoints
= 0;
401 /* Data cache header. */
403 #if 0 /* not used (yet?) */
404 static DCACHE
*mips_dcache
;
407 /* Non-zero means that we've just hit a read or write watchpoint */
408 static int hit_watchpoint
;
410 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
411 The table is indexed by a breakpoint number, which is an integer
412 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
414 #define MAX_LSI_BREAKPOINTS 256
415 struct lsi_breakpoint_info
417 enum break_type type
; /* type of breakpoint */
418 CORE_ADDR addr
; /* address of breakpoint */
419 int len
; /* length of region being watched */
420 unsigned long value
; /* value to watch */
421 } lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
423 /* Error/warning codes returned by LSI PMON for breakpoint commands.
424 Warning values may be ORed together; error values may not. */
425 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
426 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
427 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
428 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
430 #define E_ERR 0x200 /* This bit is set if the error code is an error */
431 #define E_BPT 0x200 /* error: No such breakpoint number */
432 #define E_RGE 0x201 /* error: Range is not supported */
433 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
434 #define E_OUT 0x203 /* error: Out of hardware resources */
435 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
439 int code
; /* error code */
440 char *string
; /* string associated with this code */
443 struct lsi_error lsi_warning_table
[] =
445 { W_MSK
, "Range feature is supported via mask" },
446 { W_VAL
, "Value check is not supported in hardware" },
447 { W_QAL
, "Requested qualifiers are not supported in hardware" },
451 struct lsi_error lsi_error_table
[] =
453 { E_BPT
, "No such breakpoint number" },
454 { E_RGE
, "Range is not supported" },
455 { E_QAL
, "The requested qualifiers can not be used" },
456 { E_OUT
, "Out of hardware resources" },
457 { E_NON
, "Hardware breakpoint not supported" },
461 /* Set to 1 with the 'set monitor-warnings' command to enable printing
462 of warnings returned by PMON when hardware breakpoints are used. */
463 static int monitor_warnings
;
470 SERIAL_CLOSE (mips_desc
);
474 SERIAL_CLOSE (udp_desc
);
480 /* Handle low-level error that we can't recover from. Note that just
481 error()ing out from target_wait or some such low-level place will cause
482 all hell to break loose--the rest of GDB will tend to get left in an
483 inconsistent state. */
486 #ifdef ANSI_PROTOTYPES
487 mips_error (char *string
, ...)
489 mips_error (va_alist
)
495 #ifdef ANSI_PROTOTYPES
496 va_start (args
, string
);
500 string
= va_arg (args
, char *);
503 target_terminal_ours ();
504 wrap_here(""); /* Force out any buffered output */
505 gdb_flush (gdb_stdout
);
507 fprintf_filtered (gdb_stderr
, error_pre_print
);
508 vfprintf_filtered (gdb_stderr
, string
, args
);
509 fprintf_filtered (gdb_stderr
, "\n");
511 gdb_flush (gdb_stderr
);
513 /* Clean up in such a way that mips_close won't try to talk to the
514 board (it almost surely won't work since we weren't able to talk to
518 printf_unfiltered ("Ending remote MIPS debugging.\n");
519 target_mourn_inferior ();
521 return_to_top_level (RETURN_ERROR
);
524 /* putc_readable - print a character, displaying non-printable chars in
525 ^x notation or in hex. */
528 fputc_readable (ch
, file
)
530 struct gdb_file
*file
;
533 fputc_unfiltered ('\n', file
);
535 fprintf_unfiltered (file
, "\\r");
536 else if (ch
< 0x20) /* ASCII control character */
537 fprintf_unfiltered (file
, "^%c", ch
+ '@');
538 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
539 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
541 fputc_unfiltered (ch
, file
);
545 /* puts_readable - print a string, displaying non-printable chars in
546 ^x notation or in hex. */
549 fputs_readable (string
, file
)
551 struct gdb_file
*file
;
555 while ((c
= *string
++) != '\0')
556 fputc_readable (c
, file
);
560 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
561 timed out. TIMEOUT specifies timeout value in seconds.
565 mips_expect_timeout (string
, timeout
)
573 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
574 fputs_readable (string
, gdb_stdlog
);
575 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
583 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
584 were waiting for the mips_monitor_prompt... */
586 c
= SERIAL_READCHAR (mips_desc
, timeout
);
588 if (c
== SERIAL_TIMEOUT
)
591 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
596 fputc_readable (c
, gdb_stdlog
);
604 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
617 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
618 timed out. The timeout value is hard-coded to 2 seconds. Use
619 mips_expect_timeout if a different timeout value is needed.
626 return mips_expect_timeout (string
, 2);
629 /* Read the required number of characters into the given buffer (which
630 is assumed to be large enough). The only failure is a timeout. */
632 mips_getstring (string
, n
)
642 c
= SERIAL_READCHAR (mips_desc
, 2);
644 if (c
== SERIAL_TIMEOUT
) {
645 fprintf_unfiltered (gdb_stderr
,
646 "Failed to read %d characters from target (TIMEOUT)\n", n
);
657 /* Read a character from the remote, aborting on error. Returns
658 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
659 returns). FIXME: If we see the string mips_monitor_prompt from
660 the board, then we are debugging on the main console port, and we
661 have somehow dropped out of remote debugging mode. In this case,
662 we automatically go back in to remote debugging mode. This is a
663 hack, put in because I can't find any way for a program running on
664 the remote board to terminate without also ending remote debugging
665 mode. I assume users won't have any trouble with this; for one
666 thing, the IDT documentation generally assumes that the remote
667 debugging port is not the console port. This is, however, very
668 convenient for DejaGnu when you only have one connected serial
672 mips_readchar (timeout
)
676 static int state
= 0;
677 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
683 if (i
== -1 && watchdog
> 0)
687 if (state
== mips_monitor_prompt_len
)
689 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
691 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
693 target_mourn_inferior ();
694 error ("Watchdog has expired. Target detached.\n");
697 if (ch
== SERIAL_EOF
)
698 mips_error ("End of file from remote");
699 if (ch
== SERIAL_ERROR
)
700 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
701 if (remote_debug
> 1)
703 /* Don't use _filtered; we can't deal with a QUIT out of
704 target_wait, and I think this might be called from there. */
705 if (ch
!= SERIAL_TIMEOUT
)
706 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
708 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
711 /* If we have seen mips_monitor_prompt and we either time out, or
712 we see a @ (which was echoed from a packet we sent), reset the
713 board as described above. The first character in a packet after
714 the SYN (which is not echoed) is always an @ unless the packet is
715 more than 64 characters long, which ours never are. */
716 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
717 && state
== mips_monitor_prompt_len
718 && ! mips_initializing
721 if (remote_debug
> 0)
722 /* Don't use _filtered; we can't deal with a QUIT out of
723 target_wait, and I think this might be called from there. */
724 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
731 /* At this point, about the only thing we can do is abort the command
732 in progress and get back to command level as quickly as possible. */
734 error ("Remote board reset, debug protocol re-initialized.");
737 if (ch
== mips_monitor_prompt
[state
])
745 /* Get a packet header, putting the data in the supplied buffer.
746 PGARBAGE is a pointer to the number of garbage characters received
747 so far. CH is the last character received. Returns 0 for success,
748 or -1 for timeout. */
751 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
761 /* Wait for a SYN. mips_syn_garbage is intended to prevent
762 sitting here indefinitely if the board sends us one garbage
763 character per second. ch may already have a value from the
764 last time through the loop. */
767 ch
= mips_readchar (timeout
);
768 if (ch
== SERIAL_TIMEOUT
)
772 /* Printing the character here lets the user of gdb see
773 what the program is outputting, if the debugging is
774 being done on the console port. Don't use _filtered;
775 we can't deal with a QUIT out of target_wait. */
776 if (! mips_initializing
|| remote_debug
> 0)
778 fputc_readable (ch
, gdb_stdlog
);
779 gdb_flush (gdb_stdlog
);
783 if (mips_syn_garbage
> 0
784 && *pgarbage
> mips_syn_garbage
)
785 mips_error ("Debug protocol failure: more than %d characters before a sync.",
790 /* Get the packet header following the SYN. */
791 for (i
= 1; i
< HDR_LENGTH
; i
++)
793 ch
= mips_readchar (timeout
);
794 if (ch
== SERIAL_TIMEOUT
)
796 /* Make sure this is a header byte. */
797 if (ch
== SYN
|| ! HDR_CHECK (ch
))
803 /* If we got the complete header, we can return. Otherwise we
804 loop around and keep looking for SYN. */
810 /* Get a packet header, putting the data in the supplied buffer.
811 PGARBAGE is a pointer to the number of garbage characters received
812 so far. The last character read is returned in *PCH. Returns 0
813 for success, -1 for timeout, -2 for error. */
816 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
825 for (i
= 0; i
< TRLR_LENGTH
; i
++)
827 ch
= mips_readchar (timeout
);
829 if (ch
== SERIAL_TIMEOUT
)
831 if (! TRLR_CHECK (ch
))
838 /* Get the checksum of a packet. HDR points to the packet header.
839 DATA points to the packet data. LEN is the length of DATA. */
842 mips_cksum (hdr
, data
, len
)
843 const unsigned char *hdr
;
844 const unsigned char *data
;
847 register const unsigned char *p
;
853 /* The initial SYN is not included in the checksum. */
867 /* Send a packet containing the given ASCII string. */
870 mips_send_packet (s
, get_ack
)
874 /* unsigned */ int len
;
875 unsigned char *packet
;
880 if (len
> DATA_MAXLEN
)
881 mips_error ("MIPS protocol data packet too long: %s", s
);
883 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
885 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
886 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
887 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
888 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
890 memcpy (packet
+ HDR_LENGTH
, s
, len
);
892 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
893 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
894 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
895 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
897 /* Increment the sequence number. This will set mips_send_seq to
898 the sequence number we expect in the acknowledgement. */
899 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
901 /* We can only have one outstanding data packet, so we just wait for
902 the acknowledgement here. Keep retransmitting the packet until
903 we get one, or until we've tried too many times. */
904 for (try = 0; try < mips_send_retries
; try++)
909 if (remote_debug
> 0)
911 /* Don't use _filtered; we can't deal with a QUIT out of
912 target_wait, and I think this might be called from there. */
913 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
914 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
917 if (SERIAL_WRITE (mips_desc
, packet
,
918 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
919 mips_error ("write to target failed: %s", safe_strerror (errno
));
928 unsigned char hdr
[HDR_LENGTH
+ 1];
929 unsigned char trlr
[TRLR_LENGTH
+ 1];
933 /* Get the packet header. If we time out, resend the data
935 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
941 /* If we get a data packet, assume it is a duplicate and
942 ignore it. FIXME: If the acknowledgement is lost, this
943 data packet may be the packet the remote sends after the
945 if (HDR_IS_DATA (hdr
)) {
948 /* Ignore any errors raised whilst attempting to ignore
951 len
= HDR_GET_LEN (hdr
);
953 for (i
= 0; i
< len
; i
++)
957 rch
= mips_readchar (2);
963 if (rch
== SERIAL_TIMEOUT
)
965 /* ignore the character */
969 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
971 /* We don't bother checking the checksum, or providing an
972 ACK to the packet. */
976 /* If the length is not 0, this is a garbled packet. */
977 if (HDR_GET_LEN (hdr
) != 0)
980 /* Get the packet trailer. */
981 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
982 mips_retransmit_wait
);
984 /* If we timed out, resend the data packet. */
988 /* If we got a bad character, reread the header. */
992 /* If the checksum does not match the trailer checksum, this
993 is a bad packet; ignore it. */
994 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
995 != TRLR_GET_CKSUM (trlr
))
998 if (remote_debug
> 0)
1000 hdr
[HDR_LENGTH
] = '\0';
1001 trlr
[TRLR_LENGTH
] = '\0';
1002 /* Don't use _filtered; we can't deal with a QUIT out of
1003 target_wait, and I think this might be called from there. */
1004 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
1005 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
1008 /* If this ack is for the current packet, we're done. */
1009 seq
= HDR_GET_SEQ (hdr
);
1010 if (seq
== mips_send_seq
)
1013 /* If this ack is for the last packet, resend the current
1015 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1018 /* Otherwise this is a bad ack; ignore it. Increment the
1019 garbage count to ensure that we do not stay in this loop
1025 mips_error ("Remote did not acknowledge packet");
1028 /* Receive and acknowledge a packet, returning the data in BUFF (which
1029 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1030 implies that only the sender retransmits packets, so this code just
1031 waits silently for a packet. It returns the length of the received
1032 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1033 don't print an error message and return -1. */
1036 mips_receive_packet (buff
, throw_error
, timeout
)
1044 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1051 unsigned char hdr
[HDR_LENGTH
];
1052 unsigned char trlr
[TRLR_LENGTH
];
1056 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1059 mips_error ("Timed out waiting for remote packet");
1066 /* An acknowledgement is probably a duplicate; ignore it. */
1067 if (! HDR_IS_DATA (hdr
))
1069 len
= HDR_GET_LEN (hdr
);
1070 /* Check if the length is valid for an ACK, we may aswell
1071 try and read the remainder of the packet: */
1074 /* Ignore the error condition, since we are going to
1075 ignore the packet anyway. */
1076 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1078 /* Don't use _filtered; we can't deal with a QUIT out of
1079 target_wait, and I think this might be called from there. */
1080 if (remote_debug
> 0)
1081 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1085 len
= HDR_GET_LEN (hdr
);
1086 for (i
= 0; i
< len
; i
++)
1090 rch
= mips_readchar (timeout
);
1096 if (rch
== SERIAL_TIMEOUT
)
1099 mips_error ("Timed out waiting for remote packet");
1108 /* Don't use _filtered; we can't deal with a QUIT out of
1109 target_wait, and I think this might be called from there. */
1110 if (remote_debug
> 0)
1111 fprintf_unfiltered (gdb_stdlog
,
1112 "Got new SYN after %d chars (wanted %d)\n",
1117 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1121 mips_error ("Timed out waiting for packet");
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
, "Got SYN when wanted trailer\n");
1134 /* If this is the wrong sequence number, ignore it. */
1135 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1137 /* Don't use _filtered; we can't deal with a QUIT out of
1138 target_wait, and I think this might be called from there. */
1139 if (remote_debug
> 0)
1140 fprintf_unfiltered (gdb_stdlog
,
1141 "Ignoring sequence number %d (want %d)\n",
1142 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1146 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1149 if (remote_debug
> 0)
1150 /* Don't use _filtered; we can't deal with a QUIT out of
1151 target_wait, and I think this might be called from there. */
1152 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1153 mips_cksum (hdr
, buff
, len
),
1154 TRLR_GET_CKSUM (trlr
));
1156 /* The checksum failed. Send an acknowledgement for the
1157 previous packet to tell the remote to resend the packet. */
1158 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1159 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1160 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1161 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1163 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1165 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1166 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1167 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1169 if (remote_debug
> 0)
1171 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1172 /* Don't use _filtered; we can't deal with a QUIT out of
1173 target_wait, and I think this might be called from there. */
1174 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1178 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1181 mips_error ("write to target failed: %s", safe_strerror (errno
));
1187 if (remote_debug
> 0)
1190 /* Don't use _filtered; we can't deal with a QUIT out of
1191 target_wait, and I think this might be called from there. */
1192 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1195 /* We got the packet. Send an acknowledgement. */
1196 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1198 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1199 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1200 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1201 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1203 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1205 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1206 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1207 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1209 if (remote_debug
> 0)
1211 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1212 /* Don't use _filtered; we can't deal with a QUIT out of
1213 target_wait, and I think this might be called from there. */
1214 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1218 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1221 mips_error ("write to target failed: %s", safe_strerror (errno
));
1229 /* Optionally send a request to the remote system and optionally wait
1230 for the reply. This implements the remote debugging protocol,
1231 which is built on top of the packet protocol defined above. Each
1232 request has an ADDR argument and a DATA argument. The following
1233 requests are defined:
1235 \0 don't send a request; just wait for a reply
1236 i read word from instruction space at ADDR
1237 d read word from data space at ADDR
1238 I write DATA to instruction space at ADDR
1239 D write DATA to data space at ADDR
1240 r read register number ADDR
1241 R set register number ADDR to value DATA
1242 c continue execution (if ADDR != 1, set pc to ADDR)
1243 s single step (if ADDR != 1, set pc to ADDR)
1245 The read requests return the value requested. The write requests
1246 return the previous value in the changed location. The execution
1247 requests return a UNIX wait value (the approximate signal which
1248 caused execution to stop is in the upper eight bits).
1250 If PERR is not NULL, this function waits for a reply. If an error
1251 occurs, it sets *PERR to 1 and sets errno according to what the
1252 target board reports. */
1255 mips_request (cmd
, addr
, data
, perr
, timeout
, buff
)
1263 char myBuff
[DATA_MAXLEN
+ 1];
1268 unsigned long rresponse
;
1270 if (buff
== (char *) NULL
)
1275 if (mips_need_reply
)
1276 fatal ("mips_request: Trying to send command before reply");
1277 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1278 mips_send_packet (buff
, 1);
1279 mips_need_reply
= 1;
1282 if (perr
== (int *) NULL
)
1285 if (! mips_need_reply
)
1286 fatal ("mips_request: Trying to get reply before command");
1288 mips_need_reply
= 0;
1290 len
= mips_receive_packet (buff
, 1, timeout
);
1293 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1294 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1295 || (cmd
!= '\0' && rcmd
!= cmd
))
1296 mips_error ("Bad response from remote board");
1302 /* FIXME: This will returns MIPS errno numbers, which may or may
1303 not be the same as errno values used on other systems. If
1304 they stick to common errno values, they will be the same, but
1305 if they don't, they must be translated. */
1316 mips_initialize_cleanups (arg
)
1319 mips_initializing
= 0;
1323 mips_exit_cleanups (arg
)
1330 mips_send_command (cmd
, prompt
)
1334 SERIAL_WRITE (mips_desc
, cmd
, strlen(cmd
));
1338 mips_expect (mips_monitor_prompt
);
1341 /* Enter remote (dbx) debug mode: */
1345 /* Reset the sequence numbers, ready for the new debug sequence: */
1347 mips_receive_seq
= 0;
1349 if (mips_monitor
!= MON_IDT
)
1350 mips_send_command ("debug\r", 0);
1351 else /* assume IDT monitor by default */
1352 mips_send_command ("db tty0\r", 0);
1355 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1357 /* We don't need to absorb any spurious characters here, since the
1358 mips_receive_header will eat up a reasonable number of characters
1359 whilst looking for the SYN, however this avoids the "garbage"
1360 being displayed to the user. */
1361 if (mips_monitor
!= MON_IDT
)
1365 char buff
[DATA_MAXLEN
+ 1];
1366 if (mips_receive_packet (buff
, 1, 3) < 0)
1367 mips_error ("Failed to initialize (didn't receive packet).");
1371 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1376 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1380 if (mips_monitor
!= MON_IDT
)
1382 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1383 so we do not get a reply to this command: */
1384 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL
,
1385 mips_receive_wait
, NULL
);
1386 mips_need_reply
= 0;
1387 if (!mips_expect (" break!"))
1391 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err
,
1392 mips_receive_wait
, NULL
);
1394 if (!mips_expect (mips_monitor_prompt
))
1397 do_cleanups (old_cleanups
);
1402 /* Initialize a new connection to the MIPS board, and make sure we are
1403 really connected. */
1409 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1412 /* What is this code doing here? I don't see any way it can happen, and
1413 it might mean mips_initializing didn't get cleared properly.
1414 So I'll make it a warning. */
1416 if (mips_initializing
)
1418 warning ("internal error: mips_initialize called twice");
1423 mips_initializing
= 1;
1425 /* At this point, the packit protocol isn't responding. We'll try getting
1426 into the monitor, and restarting the protocol. */
1428 /* Force the system into the monitor. After this we *should* be at
1429 the mips_monitor_prompt. */
1430 if (mips_monitor
!= MON_IDT
)
1431 j
= 0; /* start by checking if we are already at the prompt */
1433 j
= 1; /* start by sending a break */
1438 case 0: /* First, try sending a CR */
1439 SERIAL_FLUSH_INPUT (mips_desc
);
1440 SERIAL_WRITE (mips_desc
, "\r", 1);
1442 case 1: /* First, try sending a break */
1443 SERIAL_SEND_BREAK (mips_desc
);
1445 case 2: /* Then, try a ^C */
1446 SERIAL_WRITE (mips_desc
, "\003", 1);
1448 case 3: /* Then, try escaping from download */
1450 if (mips_monitor
!= MON_IDT
)
1454 /* We shouldn't need to send multiple termination
1455 sequences, since the target performs line (or
1456 block) reads, and then processes those
1457 packets. In-case we were downloading a large packet
1458 we flush the output buffer before inserting a
1459 termination sequence. */
1460 SERIAL_FLUSH_OUTPUT (mips_desc
);
1461 sprintf (tbuff
, "\r/E/E\r");
1462 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1469 /* We are possibly in binary download mode, having
1470 aborted in the middle of an S-record. ^C won't
1471 work because of binary mode. The only reliable way
1472 out is to send enough termination packets (8 bytes)
1473 to fill up and then overflow the largest size
1474 S-record (255 bytes in this case). This amounts to
1478 mips_make_srec (srec
, '7', 0, NULL
, 0);
1480 for (i
= 1; i
<= 33; i
++)
1482 SERIAL_WRITE (mips_desc
, srec
, 8);
1484 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1485 break; /* Break immediatly if we get something from
1492 mips_error ("Failed to initialize.");
1495 if (mips_expect (mips_monitor_prompt
))
1499 if (mips_monitor
!= MON_IDT
)
1501 /* Sometimes PMON ignores the first few characters in the first
1502 command sent after a load. Sending a blank command gets
1504 mips_send_command ("\r", -1);
1506 /* Ensure the correct target state: */
1507 if (mips_monitor
!= MON_LSI
)
1508 mips_send_command ("set regsize 64\r", -1);
1509 mips_send_command ("set hostport tty0\r", -1);
1510 mips_send_command ("set brkcmd \"\"\r", -1);
1511 /* Delete all the current breakpoints: */
1512 mips_send_command ("db *\r", -1);
1513 /* NOTE: PMON does not have breakpoint support through the
1514 "debug" mode, only at the monitor command-line. */
1517 mips_enter_debug ();
1519 /* Clear all breakpoints: */
1520 if ((mips_monitor
== MON_IDT
1521 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1522 || mips_monitor
== MON_LSI
)
1523 monitor_supports_breakpoints
= 1;
1525 monitor_supports_breakpoints
= 0;
1527 do_cleanups (old_cleanups
);
1529 /* If this doesn't call error, we have connected; we don't care if
1530 the request itself succeeds or fails. */
1532 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err
,
1533 mips_receive_wait
, NULL
);
1534 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1535 select_frame (get_current_frame (), 0);
1538 /* Open a connection to the remote board. */
1540 common_open (ops
, name
, from_tty
, new_monitor
, new_monitor_prompt
)
1541 struct target_ops
*ops
;
1544 enum mips_monitor_type new_monitor
;
1545 char *new_monitor_prompt
;
1548 char *serial_port_name
;
1549 char *remote_name
= 0;
1550 char *local_name
= 0;
1555 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1556 device is attached to the target board (e.g., /dev/ttya).\n"
1557 "If you want to use TFTP to download to the board, specify the name of a\n"
1558 "temporary file to be used by GDB for downloads as the second argument.\n"
1559 "This filename must be in the form host:filename, where host is the name\n"
1560 "of the host running the TFTP server, and the file must be readable by the\n"
1561 "world. If the local name of the temporary file differs from the name as\n"
1562 "seen from the board via TFTP, specify that name as the third parameter.\n");
1564 /* Parse the serial port name, the optional TFTP name, and the
1565 optional local TFTP name. */
1566 if ((argv
= buildargv (name
)) == NULL
)
1568 make_cleanup_freeargv (argv
);
1570 serial_port_name
= strsave (argv
[0]);
1571 if (argv
[1]) /* remote TFTP name specified? */
1573 remote_name
= argv
[1];
1574 if (argv
[2]) /* local TFTP filename specified? */
1575 local_name
= argv
[2];
1578 target_preopen (from_tty
);
1581 unpush_target (current_ops
);
1583 /* Open and initialize the serial port. */
1584 mips_desc
= SERIAL_OPEN (serial_port_name
);
1585 if (mips_desc
== (serial_t
) NULL
)
1586 perror_with_name (serial_port_name
);
1588 if (baud_rate
!= -1)
1590 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1592 SERIAL_CLOSE (mips_desc
);
1593 perror_with_name (serial_port_name
);
1597 SERIAL_RAW (mips_desc
);
1599 /* Open and initialize the optional download port. If it is in the form
1600 hostname#portnumber, it's a UDP socket. If it is in the form
1601 hostname:filename, assume it's the TFTP filename that must be
1602 passed to the DDB board to tell it where to get the load file. */
1605 if (strchr (remote_name
, '#'))
1607 udp_desc
= SERIAL_OPEN (remote_name
);
1609 perror_with_name ("Unable to open UDP port");
1614 /* Save the remote and local names of the TFTP temp file. If
1615 the user didn't specify a local name, assume it's the same
1616 as the part of the remote name after the "host:". */
1620 free (tftp_localname
);
1621 if (local_name
== NULL
)
1622 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1623 local_name
++; /* skip over the colon */
1624 if (local_name
== NULL
)
1625 local_name
= remote_name
; /* local name same as remote name */
1626 tftp_name
= strsave (remote_name
);
1627 tftp_localname
= strsave (local_name
);
1635 /* Reset the expected monitor prompt if it's never been set before. */
1636 if (mips_monitor_prompt
== NULL
)
1637 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1638 mips_monitor
= new_monitor
;
1643 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1645 /* Switch to using remote target now. */
1648 /* FIXME: Should we call start_remote here? */
1650 /* Try to figure out the processor model if possible. */
1651 ptype
= mips_read_processor_type ();
1653 mips_set_processor_type_command (strsave (ptype
), 0);
1655 /* This is really the job of start_remote however, that makes an assumption
1656 that the target is about to print out a status message of some sort. That
1657 doesn't happen here (in fact, it may not be possible to get the monitor to
1658 send the appropriate packet). */
1660 flush_cached_frames ();
1661 registers_changed ();
1662 stop_pc
= read_pc ();
1663 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1664 select_frame (get_current_frame (), 0);
1665 print_stack_frame (selected_frame
, -1, 1);
1666 free (serial_port_name
);
1670 mips_open (name
, from_tty
)
1674 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, TARGET_MONITOR_PROMPT
);
1678 pmon_open (name
, from_tty
)
1682 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1686 ddb_open (name
, from_tty
)
1690 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1694 lsi_open (name
, from_tty
)
1700 /* Clear the LSI breakpoint table. */
1701 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1702 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1704 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1707 /* Close a connection to the remote board. */
1710 mips_close (quitting
)
1715 /* Get the board out of remote debugging mode. */
1716 (void) mips_exit_debug ();
1722 /* Detach from the remote board. */
1725 mips_detach (args
, from_tty
)
1730 error ("Argument given to \"detach\" when remotely debugging.");
1737 printf_unfiltered ("Ending remote MIPS debugging.\n");
1740 /* Tell the target board to resume. This does not wait for a reply
1741 from the board, except in the case of single-stepping on LSI boards,
1742 where PMON does return a reply. */
1745 mips_resume (pid
, step
, siggnal
)
1747 enum target_signal siggnal
;
1751 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1752 a single step, so we wait for that. */
1753 mips_request (step
? 's' : 'c',
1755 (unsigned int) siggnal
,
1756 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1757 mips_receive_wait
, NULL
);
1760 /* Return the signal corresponding to SIG, where SIG is the number which
1761 the MIPS protocol uses for the signal. */
1763 mips_signal_from_protocol (sig
)
1766 /* We allow a few more signals than the IDT board actually returns, on
1767 the theory that there is at least *some* hope that perhaps the numbering
1768 for these signals is widely agreed upon. */
1771 return TARGET_SIGNAL_UNKNOWN
;
1773 /* Don't want to use target_signal_from_host because we are converting
1774 from MIPS signal numbers, not host ones. Our internal numbers
1775 match the MIPS numbers for the signals the board can return, which
1776 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1777 return (enum target_signal
) sig
;
1780 /* Wait until the remote stops, and return a wait status. */
1783 mips_wait (pid
, status
)
1785 struct target_waitstatus
*status
;
1789 char buff
[DATA_MAXLEN
];
1795 interrupt_count
= 0;
1798 /* If we have not sent a single step or continue command, then the
1799 board is waiting for us to do something. Return a status
1800 indicating that it is stopped. */
1801 if (! mips_need_reply
)
1803 status
->kind
= TARGET_WAITKIND_STOPPED
;
1804 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1808 /* No timeout; we sit here as long as the program continues to execute. */
1810 rstatus
= mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err
, -1,
1814 mips_error ("Remote failure: %s", safe_strerror (errno
));
1816 /* On returning from a continue, the PMON monitor seems to start
1817 echoing back the messages we send prior to sending back the
1818 ACK. The code can cope with this, but to try and avoid the
1819 unnecessary serial traffic, and "spurious" characters displayed
1820 to the user, we cheat and reset the debug protocol. The problems
1821 seems to be caused by a check on the number of arguments, and the
1822 command length, within the monitor causing it to echo the command
1824 if (mips_monitor
== MON_PMON
)
1827 mips_enter_debug ();
1830 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1832 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1833 &rpc
, &rfp
, &rsp
, flags
);
1836 char buf
[MAX_REGISTER_RAW_SIZE
];
1838 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1839 supply_register (PC_REGNUM
, buf
);
1841 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1842 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1844 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1845 supply_register (SP_REGNUM
, buf
);
1847 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1848 supply_register (FP_REGNUM
, buf
);
1854 for (i
= 0; i
<= 2; i
++)
1855 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1857 else if (flags
[i
] == '\000')
1862 if (strcmp (target_shortname
, "lsi") == 0)
1865 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1866 Right now, PMON doesn't give us enough information to determine which
1867 breakpoint we hit. So we have to look up the PC in our own table
1868 of breakpoints, and if found, assume it's just a normal instruction
1869 fetch breakpoint, not a data watchpoint. FIXME when PMON
1870 provides some way to tell us what type of breakpoint it is. */
1872 CORE_ADDR pc
= read_pc();
1875 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1877 if (lsi_breakpoints
[i
].addr
== pc
1878 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1885 /* If a data breakpoint was hit, PMON returns the following packet:
1887 The return packet from an ordinary breakpoint doesn't have the
1888 extra 0x01 field tacked onto the end. */
1889 if (nfields
== 1 && rpc
== 1)
1894 /* NOTE: The following (sig) numbers are defined by PMON:
1895 SPP_SIGTRAP 5 breakpoint
1903 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1904 and so on, because the constants we want here are determined by the
1905 MIPS protocol and have nothing to do with what host we are running on. */
1906 if ((rstatus
& 0xff) == 0)
1908 status
->kind
= TARGET_WAITKIND_EXITED
;
1909 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1911 else if ((rstatus
& 0xff) == 0x7f)
1913 status
->kind
= TARGET_WAITKIND_STOPPED
;
1914 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1916 /* If the stop PC is in the _exit function, assume
1917 we hit the 'break 0x3ff' instruction in _exit, so this
1918 is not a normal breakpoint. */
1919 if (strcmp (target_shortname
, "lsi") == 0)
1922 CORE_ADDR func_start
;
1923 CORE_ADDR pc
= read_pc();
1925 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1926 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1927 && func_start
== pc
)
1928 status
->kind
= TARGET_WAITKIND_EXITED
;
1933 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1934 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1940 /* We have to map between the register numbers used by gdb and the
1941 register numbers used by the debugging protocol. This function
1942 assumes that we are using tm-mips.h. */
1944 #define REGNO_OFFSET 96
1947 mips_map_regno (regno
)
1952 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1953 return regno
- FP0_REGNUM
+ 32;
1957 return REGNO_OFFSET
+ 0;
1959 return REGNO_OFFSET
+ 1;
1961 return REGNO_OFFSET
+ 2;
1963 return REGNO_OFFSET
+ 3;
1965 return REGNO_OFFSET
+ 4;
1967 return REGNO_OFFSET
+ 5;
1969 /* FIXME: Is there a way to get the status register? */
1974 /* Fetch the remote registers. */
1977 mips_fetch_registers (regno
)
1980 unsigned LONGEST val
;
1985 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1986 mips_fetch_registers (regno
);
1990 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1991 /* FP_REGNUM on the mips is a hack which is just supposed to read
1992 zero (see also mips-nat.c). */
1996 /* If PMON doesn't support this register, don't waste serial
1997 bandwidth trying to read it. */
1998 int pmon_reg
= mips_map_regno (regno
);
1999 if (regno
!= 0 && pmon_reg
== 0)
2003 /* Unfortunately the PMON version in the Vr4300 board has been
2004 compiled without the 64bit register access commands. This
2005 means we cannot get hold of the full register width. */
2006 if (mips_monitor
== MON_DDB
)
2007 val
= (unsigned)mips_request ('t', (unsigned int) pmon_reg
,
2008 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2010 val
= mips_request ('r', (unsigned int) pmon_reg
,
2011 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2013 mips_error ("Can't read register %d: %s", regno
,
2014 safe_strerror (errno
));
2019 char buf
[MAX_REGISTER_RAW_SIZE
];
2021 /* We got the number the register holds, but gdb expects to see a
2022 value in the target byte ordering. */
2023 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
2024 supply_register (regno
, buf
);
2028 /* Prepare to store registers. The MIPS protocol can store individual
2029 registers, so this function doesn't have to do anything. */
2032 mips_prepare_to_store ()
2036 /* Store remote register(s). */
2039 mips_store_registers (regno
)
2046 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2047 mips_store_registers (regno
);
2051 mips_request ('R', (unsigned int) mips_map_regno (regno
),
2052 read_register (regno
),
2053 &err
, mips_receive_wait
, NULL
);
2055 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2058 /* Fetch a word from the target board. */
2061 mips_fetch_word (addr
)
2067 /* FIXME! addr was cast to uint! */
2068 val
= mips_request ('d', addr
, (unsigned int) 0, &err
,
2069 mips_receive_wait
, NULL
);
2072 /* Data space failed; try instruction space. */
2073 /* FIXME! addr was cast to uint! */
2074 val
= mips_request ('i', addr
, (unsigned int) 0, &err
,
2075 mips_receive_wait
, NULL
);
2077 mips_error ("Can't read address 0x%s: %s",
2078 paddr_nz (addr
), safe_strerror (errno
));
2083 /* Store a word to the target board. Returns errno code or zero for
2084 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2085 memory location there. */
2087 /* FIXME! make sure only 32-bit quantities get stored! */
2089 mips_store_word (addr
, val
, old_contents
)
2095 unsigned int oldcontents
;
2097 oldcontents
= mips_request ('D', addr
, (unsigned int) val
,
2099 mips_receive_wait
, NULL
);
2102 /* Data space failed; try instruction space. */
2103 oldcontents
= mips_request ('I', addr
,
2104 (unsigned int) val
, &err
,
2105 mips_receive_wait
, NULL
);
2109 if (old_contents
!= NULL
)
2110 store_unsigned_integer (old_contents
, 4, oldcontents
);
2114 /* Read or write LEN bytes from inferior memory at MEMADDR,
2115 transferring to or from debugger address MYADDR. Write to inferior
2116 if SHOULD_WRITE is nonzero. Returns length of data written or
2117 read; 0 for error. Note that protocol gives us the correct value
2118 for a longword, since it transfers values in ASCII. We want the
2119 byte values, so we have to swap the longword values. */
2122 mips_xfer_memory (memaddr
, myaddr
, len
, write
, ignore
)
2127 struct target_ops
*ignore
;
2130 /* Round starting address down to longword boundary. */
2131 register CORE_ADDR addr
= memaddr
&~ 3;
2132 /* Round ending address up; get number of longwords that makes. */
2133 register int count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2134 /* Allocate buffer of that many longwords. */
2135 register char *buffer
= alloca (count
* 4);
2141 /* Fill start and end extra bytes of buffer with existing data. */
2142 if (addr
!= memaddr
|| len
< 4)
2144 /* Need part of initial word -- fetch it. */
2145 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2150 /* Need part of last word -- fetch it. FIXME: we do this even
2151 if we don't need it. */
2152 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2153 mips_fetch_word (addr
+ (count
- 1) * 4));
2156 /* Copy data to be written over corresponding part of buffer */
2158 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2160 /* Write the entire buffer. */
2162 for (i
= 0; i
< count
; i
++, addr
+= 4)
2164 status
= mips_store_word (addr
,
2165 extract_unsigned_integer (&buffer
[i
*4], 4),
2167 /* Report each kilobyte (we download 32-bit words at a time) */
2170 printf_unfiltered ("*");
2171 gdb_flush (gdb_stdout
);
2178 /* FIXME: Do we want a QUIT here? */
2181 printf_unfiltered ("\n");
2185 /* Read all the longwords */
2186 for (i
= 0; i
< count
; i
++, addr
+= 4)
2188 store_unsigned_integer (&buffer
[i
*4], 4, mips_fetch_word (addr
));
2192 /* Copy appropriate bytes out of the buffer. */
2193 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2198 /* Print info on this target. */
2201 mips_files_info (ignore
)
2202 struct target_ops
*ignore
;
2204 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2207 /* Kill the process running on the board. This will actually only
2208 work if we are doing remote debugging over the console input. I
2209 think that if IDT/sim had the remote debug interrupt enabled on the
2210 right port, we could interrupt the process with a break signal. */
2215 if (!mips_wait_flag
)
2220 if (interrupt_count
>= 2)
2222 interrupt_count
= 0;
2224 target_terminal_ours ();
2226 if (query ("Interrupted while waiting for the program.\n\
2227 Give up (and stop debugging it)? "))
2229 /* Clean up in such a way that mips_close won't try to talk to the
2230 board (it almost surely won't work since we weren't able to talk to
2235 printf_unfiltered ("Ending remote MIPS debugging.\n");
2236 target_mourn_inferior ();
2238 return_to_top_level (RETURN_QUIT
);
2241 target_terminal_inferior ();
2244 if (remote_debug
> 0)
2245 printf_unfiltered ("Sending break\n");
2247 SERIAL_SEND_BREAK (mips_desc
);
2256 SERIAL_WRITE (mips_desc
, &cc
, 1);
2258 target_mourn_inferior ();
2263 /* Start running on the target board. */
2266 mips_create_inferior (execfile
, args
, env
)
2276 Can't pass arguments to remote MIPS board; arguments ignored.");
2277 /* And don't try to use them on the next "run" command. */
2278 execute_command ("set args", 0);
2281 if (execfile
== 0 || exec_bfd
== 0)
2282 error ("No executable file specified");
2284 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2286 init_wait_for_inferior ();
2288 /* FIXME: Should we set inferior_pid here? */
2290 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2293 /* Clean up after a process. Actually nothing to do. */
2296 mips_mourn_inferior ()
2298 if (current_ops
!= NULL
)
2299 unpush_target (current_ops
);
2300 generic_mourn_inferior ();
2303 /* We can write a breakpoint and read the shadow contents in one
2306 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2307 support, we read the contents of the target location and stash it,
2308 then overwrite it with a breakpoint instruction. ADDR is the target
2309 location in the target machine. CONTENTS_CACHE is a pointer to
2310 memory allocated for saving the target contents. It is guaranteed
2311 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2312 is accomplished via BREAKPOINT_MAX). */
2315 mips_insert_breakpoint (addr
, contents_cache
)
2317 char *contents_cache
;
2319 if (monitor_supports_breakpoints
)
2320 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2322 return memory_insert_breakpoint (addr
, contents_cache
);
2326 mips_remove_breakpoint (addr
, contents_cache
)
2328 char *contents_cache
;
2330 if (monitor_supports_breakpoints
)
2331 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2333 return memory_remove_breakpoint (addr
, contents_cache
);
2336 #if 0 /* currently not used */
2337 /* PMON does not currently provide support for the debug mode 'b'
2338 commands to manipulate breakpoints. However, if we wanted to use
2339 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2340 then this code performs the work needed to leave debug mode,
2341 set/clear the breakpoint, and then return to debug mode. */
2343 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2344 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2345 /* NOTE: The code relies on this vector being zero-initialised by the system */
2348 pmon_insert_breakpoint (addr
, contents_cache
)
2350 char *contents_cache
;
2354 if (monitor_supports_breakpoints
)
2356 char tbuff
[12]; /* space for breakpoint command */
2360 /* PMON does not support debug level breakpoint set/remove: */
2361 if (mips_exit_debug ())
2362 mips_error ("Failed to exit debug mode");
2364 sprintf (tbuff
, "b %08x\r", addr
);
2365 mips_send_command (tbuff
, 0);
2367 mips_expect ("Bpt ");
2369 if (!mips_getstring (tbuff
, 2))
2371 tbuff
[2] = '\0'; /* terminate the string */
2372 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2374 fprintf_unfiltered (gdb_stderr
,
2375 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2379 mips_expect (" = ");
2381 /* Lead in the hex number we are expecting: */
2385 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2386 which targets return 64-bit addresses? PMON returns only 32! */
2387 if (!mips_getstring (&tbuff
[2], 8))
2389 tbuff
[10] = '\0'; /* terminate the string */
2391 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2393 fprintf_unfiltered (gdb_stderr
,
2394 "Invalid hex address from target: %s\n", tbuff
);
2398 if (bpnum
>= PMON_MAX_BP
)
2400 fprintf_unfiltered (gdb_stderr
,
2401 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2402 bpnum
, PMON_MAX_BP
- 1);
2407 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2409 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2411 mips_expect ("\r\n");
2412 mips_expect (mips_monitor_prompt
);
2414 mips_enter_debug ();
2419 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2423 pmon_remove_breakpoint (addr
, contents_cache
)
2425 char *contents_cache
;
2427 if (monitor_supports_breakpoints
)
2430 char tbuff
[7]; /* enough for delete breakpoint command */
2432 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2433 if (mips_pmon_bp_info
[bpnum
] == addr
)
2436 if (bpnum
>= PMON_MAX_BP
)
2438 fprintf_unfiltered (gdb_stderr
,
2439 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2444 if (mips_exit_debug ())
2445 mips_error ("Failed to exit debug mode");
2447 sprintf (tbuff
, "db %02d\r", bpnum
);
2449 mips_send_command (tbuff
, -1);
2450 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2451 set" message will be returned. */
2453 mips_enter_debug ();
2458 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2463 /* Tell whether this target can support a hardware breakpoint. CNT
2464 is the number of hardware breakpoints already installed. This
2465 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2468 remote_mips_can_use_hardware_watchpoint (cnt
)
2471 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2475 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2476 This is used for memory ref breakpoints. */
2478 static unsigned long
2479 calculate_mask (addr
, len
)
2486 mask
= addr
^ (addr
+ len
- 1);
2488 for (i
= 32; i
>= 0; i
--)
2494 mask
= (unsigned long) 0xffffffff >> i
;
2500 /* Insert a hardware breakpoint. This works only on LSI targets, which
2501 implement ordinary breakpoints using hardware facilities. */
2504 remote_mips_insert_hw_breakpoint (addr
, contents_cache
)
2506 char *contents_cache
;
2508 if (strcmp (target_shortname
, "lsi") == 0)
2509 return mips_insert_breakpoint (addr
, contents_cache
);
2515 /* Remove a hardware breakpoint. This works only on LSI targets, which
2516 implement ordinary breakpoints using hardware facilities. */
2519 remote_mips_remove_hw_breakpoint (addr
, contents_cache
)
2521 char *contents_cache
;
2523 if (strcmp (target_shortname
, "lsi") == 0)
2524 return mips_remove_breakpoint (addr
, contents_cache
);
2529 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2530 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2534 remote_mips_set_watchpoint (addr
, len
, type
)
2539 if (set_breakpoint (addr
, len
, type
))
2546 remote_mips_remove_watchpoint (addr
, len
, type
)
2551 if (clear_breakpoint (addr
, len
, type
))
2558 remote_mips_stopped_by_watchpoint ()
2560 return hit_watchpoint
;
2564 /* Insert a breakpoint. */
2567 set_breakpoint (addr
, len
, type
)
2570 enum break_type type
;
2572 return common_breakpoint (1, addr
, len
, type
);
2576 /* Clear a breakpoint. */
2579 clear_breakpoint (addr
, len
, type
)
2582 enum break_type type
;
2584 return common_breakpoint (0, addr
, len
, type
);
2588 /* Check the error code from the return packet for an LSI breakpoint
2589 command. If there's no error, just return 0. If it's a warning,
2590 print the warning text and return 0. If it's an error, print
2591 the error text and return 1. <ADDR> is the address of the breakpoint
2592 that was being set. <RERRFLG> is the error code returned by PMON.
2593 This is a helper function for common_breakpoint. */
2596 check_lsi_error (addr
, rerrflg
)
2600 struct lsi_error
*err
;
2601 char *saddr
= paddr_nz (addr
); /* printable address string */
2603 if (rerrflg
== 0) /* no error */
2606 /* Warnings can be ORed together, so check them all. */
2607 if (rerrflg
& W_WARN
)
2609 if (monitor_warnings
)
2612 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2614 if ((err
->code
& rerrflg
) == err
->code
)
2617 fprintf_unfiltered (gdb_stderr
,
2618 "common_breakpoint (0x%s): Warning: %s\n",
2624 fprintf_unfiltered (gdb_stderr
,
2625 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2632 /* Errors are unique, i.e. can't be ORed together. */
2633 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2635 if ((err
->code
& rerrflg
) == err
->code
)
2637 fprintf_unfiltered (gdb_stderr
,
2638 "common_breakpoint (0x%s): Error: %s\n",
2644 fprintf_unfiltered (gdb_stderr
,
2645 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2652 /* This routine sends a breakpoint command to the remote target.
2654 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2655 <ADDR> is the address of the breakpoint.
2656 <LEN> the length of the region to break on.
2657 <TYPE> is the type of breakpoint:
2658 0 = write (BREAK_WRITE)
2659 1 = read (BREAK_READ)
2660 2 = read/write (BREAK_ACCESS)
2661 3 = instruction fetch (BREAK_FETCH)
2663 Return 0 if successful; otherwise 1. */
2666 common_breakpoint (set
, addr
, len
, type
)
2670 enum break_type type
;
2672 char buf
[DATA_MAXLEN
+ 1];
2674 int rpid
, rerrflg
, rresponse
, rlen
;
2677 addr
= ADDR_BITS_REMOVE (addr
);
2679 if (mips_monitor
== MON_LSI
)
2681 if (set
== 0) /* clear breakpoint */
2683 /* The LSI PMON "clear breakpoint" has this form:
2684 <pid> 'b' <bptn> 0x0
2686 <pid> 'b' 0x0 <code>
2688 <bptn> is a breakpoint number returned by an earlier 'B' command.
2689 Possible return codes: OK, E_BPT. */
2693 /* Search for the breakpoint in the table. */
2694 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2695 if (lsi_breakpoints
[i
].type
== type
2696 && lsi_breakpoints
[i
].addr
== addr
2697 && lsi_breakpoints
[i
].len
== len
)
2700 /* Clear the table entry and tell PMON to clear the breakpoint. */
2701 if (i
== MAX_LSI_BREAKPOINTS
)
2703 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2708 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2709 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2710 mips_send_packet (buf
, 1);
2712 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2715 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2717 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2719 return (check_lsi_error (addr
, rerrflg
));
2721 else /* set a breakpoint */
2723 /* The LSI PMON "set breakpoint" command has this form:
2724 <pid> 'B' <addr> 0x0
2726 <pid> 'B' <bptn> <code>
2728 The "set data breakpoint" command has this form:
2730 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2732 where: type= "0x1" = read
2734 "0x3" = access (read or write)
2736 The reply returns two values:
2737 bptn - a breakpoint number, which is a small integer with
2738 possible values of zero through 255.
2739 code - an error return code, a value of zero indicates a
2740 succesful completion, other values indicate various
2741 errors and warnings.
2743 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2747 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2750 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2752 else /* watchpoint */
2755 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2756 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2757 paddr_nz (addr
+ len
- 1));
2759 mips_send_packet (buf
, 1);
2761 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2764 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2765 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2766 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2767 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2770 if (check_lsi_error (addr
, rerrflg
))
2773 /* rresponse contains PMON's breakpoint number. Record the
2774 information for this breakpoint so we can clear it later. */
2775 lsi_breakpoints
[rresponse
].type
= type
;
2776 lsi_breakpoints
[rresponse
].addr
= addr
;
2777 lsi_breakpoints
[rresponse
].len
= len
;
2784 /* On non-LSI targets, the breakpoint command has this form:
2785 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2786 <MASK> is a don't care mask for addresses.
2787 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2791 mask
= calculate_mask (addr
, len
);
2794 if (set
) /* set a breakpoint */
2799 case BREAK_WRITE
: /* write */
2802 case BREAK_READ
: /* read */
2805 case BREAK_ACCESS
: /* read/write */
2808 case BREAK_FETCH
: /* fetch */
2816 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2817 paddr_nz (mask
), flags
);
2822 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2825 mips_send_packet (buf
, 1);
2827 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2830 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2831 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2833 if (nfields
!= 4 || rcmd
!= cmd
)
2834 mips_error ("common_breakpoint: Bad response from remote board: %s",
2839 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2840 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2841 if (mips_monitor
== MON_DDB
)
2842 rresponse
= rerrflg
;
2843 if (rresponse
!= 22) /* invalid argument */
2844 fprintf_unfiltered (gdb_stderr
,
2845 "common_breakpoint (0x%s): Got error: 0x%x\n",
2846 paddr_nz (addr
), rresponse
);
2854 send_srec (srec
, len
, addr
)
2863 SERIAL_WRITE (mips_desc
, srec
, len
);
2865 ch
= mips_readchar (2);
2869 case SERIAL_TIMEOUT
:
2870 error ("Timeout during download.");
2874 case 0x15: /* NACK */
2875 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %d! Retrying.\n", addr
);
2878 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2883 /* Download a binary file by converting it to S records. */
2886 mips_load_srec (args
)
2891 char *buffer
, srec
[1024];
2893 unsigned int srec_frame
= 200;
2895 static int hashmark
= 1;
2897 buffer
= alloca (srec_frame
* 2 + 256);
2899 abfd
= bfd_openr (args
, 0);
2902 printf_filtered ("Unable to open file %s\n", args
);
2906 if (bfd_check_format (abfd
, bfd_object
) == 0)
2908 printf_filtered ("File is not an object file\n");
2912 /* This actually causes a download in the IDT binary format: */
2913 mips_send_command (LOAD_CMD
, 0);
2915 for (s
= abfd
->sections
; s
; s
= s
->next
)
2917 if (s
->flags
& SEC_LOAD
)
2919 unsigned int numbytes
;
2921 /* FIXME! vma too small?? */
2922 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
,
2923 s
->vma
+ s
->_raw_size
);
2924 gdb_flush (gdb_stdout
);
2926 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2928 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2930 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2932 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2933 send_srec (srec
, reclen
, s
->vma
+ i
);
2937 putchar_unfiltered ('#');
2938 gdb_flush (gdb_stdout
);
2941 } /* Per-packet (or S-record) loop */
2943 putchar_unfiltered ('\n');
2944 } /* Loadable sections */
2947 putchar_unfiltered ('\n');
2949 /* Write a type 7 terminator record. no data for a type 7, and there
2950 is no data, so len is 0. */
2952 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2954 send_srec (srec
, reclen
, abfd
->start_address
);
2956 SERIAL_FLUSH_INPUT (mips_desc
);
2960 * mips_make_srec -- make an srecord. This writes each line, one at a
2961 * time, each with it's own header and trailer line.
2962 * An srecord looks like this:
2964 * byte count-+ address
2965 * start ---+ | | data +- checksum
2967 * S01000006F6B692D746573742E73726563E4
2968 * S315000448600000000000000000FC00005900000000E9
2969 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2970 * S30B0004485A0000000000004E
2973 * S<type><length><address><data><checksum>
2977 * is the number of bytes following upto the checksum. Note that
2978 * this is not the number of chars following, since it takes two
2979 * chars to represent a byte.
2983 * 1) two byte address data record
2984 * 2) three byte address data record
2985 * 3) four byte address data record
2986 * 7) four byte address termination record
2987 * 8) three byte address termination record
2988 * 9) two byte address termination record
2991 * is the start address of the data following, or in the case of
2992 * a termination record, the start address of the image
2996 * is the sum of all the raw byte data in the record, from the length
2997 * upwards, modulo 256 and subtracted from 255.
2999 * This routine returns the length of the S-record.
3004 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
3008 unsigned char *myaddr
;
3011 unsigned char checksum
;
3014 /* Create the header for the srec. addr_size is the number of bytes in the address,
3015 and 1 is the number of bytes in the count. */
3017 /* FIXME!! bigger buf required for 64-bit! */
3020 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
3021 /* This assumes S3 style downloads (4byte addresses). There should
3022 probably be a check, or the code changed to make it more
3024 buf
[3] = memaddr
>> 24;
3025 buf
[4] = memaddr
>> 16;
3026 buf
[5] = memaddr
>> 8;
3028 memcpy (&buf
[7], myaddr
, len
);
3030 /* Note that the checksum is calculated on the raw data, not the
3031 hexified data. It includes the length, address and the data
3032 portions of the packet. */
3034 buf
+= 2; /* Point at length byte */
3035 for (i
= 0; i
< len
+ 4 + 1; i
++)
3043 /* The following manifest controls whether we enable the simple flow
3044 control support provided by the monitor. If enabled the code will
3045 wait for an affirmative ACK between transmitting packets. */
3046 #define DOETXACK (1)
3048 /* The PMON fast-download uses an encoded packet format constructed of
3049 3byte data packets (encoded as 4 printable ASCII characters), and
3050 escape sequences (preceded by a '/'):
3053 'C' compare checksum (12bit value, not included in checksum calculation)
3054 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3055 'Z' zero fill multiple of 3bytes
3056 'B' byte (12bit encoded value, of 8bit data)
3057 'A' address (36bit encoded value)
3058 'E' define entry as original address, and exit load
3060 The packets are processed in 4 character chunks, so the escape
3061 sequences that do not have any data (or variable length data)
3062 should be padded to a 4 character boundary. The decoder will give
3063 an error if the complete message block size is not a multiple of
3064 4bytes (size of record).
3066 The encoding of numbers is done in 6bit fields. The 6bit value is
3067 used to index into this string to get the specific character
3068 encoding for the value: */
3069 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3071 /* Convert the number of bits required into an encoded number, 6bits
3072 at a time (range 0..63). Keep a checksum if required (passed
3073 pointer non-NULL). The function returns the number of encoded
3074 characters written into the buffer. */
3076 pmon_makeb64 (v
, p
, n
, chksum
)
3082 int count
= (n
/ 6);
3084 if ((n
% 12) != 0) {
3085 fprintf_unfiltered(gdb_stderr
,
3086 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n
,(n
== 1)?"":"s");
3090 fprintf_unfiltered(gdb_stderr
,
3091 "Fast encoding cannot process more than 36bits at the moment: %dbits\n",n
);
3095 /* Deal with the checksum: */
3096 if (chksum
!= NULL
) {
3098 case 36: *chksum
+= ((v
>> 24) & 0xFFF);
3099 case 24: *chksum
+= ((v
>> 12) & 0xFFF);
3100 case 12: *chksum
+= ((v
>> 0) & 0xFFF);
3106 *p
++ = encoding
[(v
>> n
) & 0x3F];
3112 /* Shorthand function (that could be in-lined) to output the zero-fill
3113 escape sequence into the data stream. */
3115 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3119 unsigned int *chksum
;
3123 sprintf(*buff
,"/Z");
3124 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3125 *buff
+= (count
+ 2);
3127 return(recsize
+ count
+ 2);
3131 pmon_checkset (recsize
, buff
, value
)
3138 /* Add the checksum (without updating the value): */
3139 sprintf (*buff
, "/C");
3140 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3141 *buff
+= (count
+ 2);
3142 sprintf (*buff
, "\n");
3143 *buff
+= 2; /* include zero terminator */
3144 /* Forcing a checksum validation clears the sum: */
3146 return(recsize
+ count
+ 3);
3149 /* Amount of padding we leave after at the end of the output buffer,
3150 for the checksum and line termination characters: */
3151 #define CHECKSIZE (4 + 4 + 4 + 2)
3152 /* zero-fill, checksum, transfer end and line termination space. */
3154 /* The amount of binary data loaded from the object file in a single
3156 #define BINCHUNK (1024)
3158 /* Maximum line of data accepted by the monitor: */
3159 #define MAXRECSIZE (550)
3160 /* NOTE: This constant depends on the monitor being used. This value
3161 is for PMON 5.x on the Cogent Vr4300 board. */
3164 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3166 unsigned char *inbuf
;
3171 unsigned int *zerofill
;
3176 /* This is a simple check to ensure that our data will fit within
3177 the maximum allowable record size. Each record output is 4bytes
3178 in length. We must allow space for a pending zero fill command,
3179 the record, and a checksum record. */
3180 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0)) {
3181 /* Process the binary data: */
3182 if ((inamount
- *inptr
) < 3) {
3184 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3186 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3188 *recsize
+= (2 + count
);
3191 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3192 /* Simple check for zero data. TODO: A better check would be
3193 to check the last, and then the middle byte for being zero
3194 (if the first byte is not). We could then check for
3195 following runs of zeros, and if above a certain size it is
3196 worth the 4 or 8 character hit of the byte insertions used
3197 to pad to the start of the zeroes. NOTE: This also depends
3198 on the alignment at the end of the zero run. */
3199 if (value
== 0x00000000) {
3201 if (*zerofill
== 0xFFF) /* 12bit counter */
3202 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3205 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3206 count
= pmon_makeb64 (value
, p
, 24, csum
);
3219 pmon_check_ack(mesg
)
3222 #if defined(DOETXACK)
3227 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3228 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3230 fprintf_unfiltered (gdb_stderr
,
3231 "Failed to receive valid ACK for %s\n", mesg
);
3232 return(-1); /* terminate the download */
3235 #endif /* DOETXACK */
3239 /* pmon_download - Send a sequence of characters to the PMON download port,
3240 which is either a serial port or a UDP socket. */
3243 pmon_start_download ()
3247 /* Create the temporary download file. */
3248 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3249 perror_with_name (tftp_localname
);
3253 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3254 mips_expect ("Downloading from ");
3255 mips_expect (udp_in_use
? "udp" : "tty0");
3256 mips_expect (", ^C to abort\r\n");
3261 mips_expect_download (char *string
)
3263 if (!mips_expect (string
))
3265 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3267 remove (tftp_localname
); /* Remove temporary file */
3275 pmon_end_download (final
, bintotal
)
3279 char hexnumber
[9]; /* includes '\0' space */
3283 static char *load_cmd_prefix
= "load -b -s ";
3287 /* Close off the temporary file containing the load data. */
3291 /* Make the temporary file readable by the world. */
3292 if (stat (tftp_localname
, &stbuf
) == 0)
3293 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3295 /* Must reinitialize the board to prevent PMON from crashing. */
3296 mips_send_command ("initEther\r", -1);
3298 /* Send the load command. */
3299 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3300 strcpy (cmd
, load_cmd_prefix
);
3301 strcat (cmd
, tftp_name
);
3303 mips_send_command (cmd
, 0);
3305 if (!mips_expect_download ("Downloading from "))
3307 if (!mips_expect_download (tftp_name
))
3309 if (!mips_expect_download (", ^C to abort\r\n"))
3313 /* Wait for the stuff that PMON prints after the load has completed.
3314 The timeout value for use in the tftp case (15 seconds) was picked
3315 arbitrarily but might be too small for really large downloads. FIXME. */
3316 if (mips_monitor
== MON_LSI
)
3318 pmon_check_ack ("termination");
3319 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3322 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3324 sprintf (hexnumber
,"%x",final
);
3325 mips_expect (hexnumber
);
3326 mips_expect ("\r\n");
3327 if (mips_monitor
!= MON_LSI
)
3328 pmon_check_ack ("termination");
3329 mips_expect ("\r\ntotal = 0x");
3330 sprintf (hexnumber
,"%x",bintotal
);
3331 mips_expect (hexnumber
);
3332 if (!mips_expect_download (" bytes\r\n"))
3336 remove (tftp_localname
); /* Remove temporary file */
3340 pmon_download (buffer
, length
)
3345 fwrite (buffer
, 1, length
, tftp_file
);
3347 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3351 pmon_load_fast (file
)
3356 unsigned char *binbuf
;
3359 unsigned int csum
= 0;
3360 int hashmark
= !tftp_in_use
;
3365 buffer
= (char *)xmalloc(MAXRECSIZE
+ 1);
3366 binbuf
= (unsigned char *)xmalloc(BINCHUNK
);
3368 abfd
= bfd_openr(file
,0);
3371 printf_filtered ("Unable to open file %s\n",file
);
3375 if (bfd_check_format(abfd
,bfd_object
) == 0)
3377 printf_filtered("File is not an object file\n");
3381 /* Setup the required download state: */
3382 mips_send_command ("set dlproto etxack\r", -1);
3383 mips_send_command ("set dlecho off\r", -1);
3384 /* NOTE: We get a "cannot set variable" message if the variable is
3385 already defined to have the argument we give. The code doesn't
3386 care, since it just scans to the next prompt anyway. */
3387 /* Start the download: */
3388 pmon_start_download();
3390 /* Zero the checksum */
3391 sprintf(buffer
,"/Kxx\n");
3392 reclen
= strlen(buffer
);
3393 pmon_download (buffer
, reclen
);
3394 finished
= pmon_check_ack("/Kxx");
3396 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3397 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3399 bintotal
+= s
->_raw_size
;
3400 final
= (s
->vma
+ s
->_raw_size
);
3402 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int)s
->vma
,
3403 (unsigned int)(s
->vma
+ s
->_raw_size
));
3404 gdb_flush (gdb_stdout
);
3406 /* Output the starting address */
3407 sprintf(buffer
,"/A");
3408 reclen
= pmon_makeb64(s
->vma
,&buffer
[2],36,&csum
);
3409 buffer
[2 + reclen
] = '\n';
3410 buffer
[3 + reclen
] = '\0';
3411 reclen
+= 3; /* for the initial escape code and carriage return */
3412 pmon_download (buffer
, reclen
);
3413 finished
= pmon_check_ack("/A");
3417 unsigned int binamount
;
3418 unsigned int zerofill
= 0;
3424 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
) {
3427 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3429 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3431 /* This keeps a rolling checksum, until we decide to output
3433 for (; ((binamount
- binptr
) > 0);) {
3434 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3435 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
)) {
3436 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3437 pmon_download (buffer
, reclen
);
3438 finished
= pmon_check_ack("data record");
3440 zerofill
= 0; /* do not transmit pending zerofills */
3445 putchar_unfiltered ('#');
3446 gdb_flush (gdb_stdout
);
3450 reclen
= 0; /* buffer processed */
3455 /* Ensure no out-standing zerofill requests: */
3457 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3459 /* and then flush the line: */
3461 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3462 /* Currently pmon_checkset outputs the line terminator by
3463 default, so we write out the buffer so far: */
3464 pmon_download (buffer
, reclen
);
3465 finished
= pmon_check_ack("record remnant");
3469 putchar_unfiltered ('\n');
3472 /* Terminate the transfer. We know that we have an empty output
3473 buffer at this point. */
3474 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3475 reclen
= strlen (buffer
);
3476 pmon_download (buffer
, reclen
);
3478 if (finished
) { /* Ignore the termination message: */
3479 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3480 } else { /* Deal with termination message: */
3481 pmon_end_download (final
, bintotal
);
3487 /* mips_load -- download a file. */
3490 mips_load (file
, from_tty
)
3494 /* Get the board out of remote debugging mode. */
3495 if (mips_exit_debug ())
3496 error ("mips_load: Couldn't get into monitor mode.");
3498 if (mips_monitor
!= MON_IDT
)
3499 pmon_load_fast (file
);
3501 mips_load_srec (file
);
3505 /* Finally, make the PC point at the start address */
3506 if (mips_monitor
!= MON_IDT
)
3508 /* Work around problem where PMON monitor updates the PC after a load
3509 to a different value than GDB thinks it has. The following ensures
3510 that the write_pc() WILL update the PC value: */
3511 register_valid
[PC_REGNUM
] = 0;
3514 write_pc (bfd_get_start_address (exec_bfd
));
3516 inferior_pid
= 0; /* No process now */
3518 /* This is necessary because many things were based on the PC at the time that
3519 we attached to the monitor, which is no longer valid now that we have loaded
3520 new code (and just changed the PC). Another way to do this might be to call
3521 normal_stop, except that the stack may not be valid, and things would get
3522 horribly confused... */
3524 clear_symtab_users ();
3528 /* Pass the command argument as a packet to PMON verbatim. */
3531 pmon_command (args
, from_tty
)
3535 char buf
[DATA_MAXLEN
+ 1];
3538 sprintf (buf
, "0x0 %s", args
);
3539 mips_send_packet (buf
, 1);
3540 printf_filtered ("Send packet: %s\n", buf
);
3542 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3544 printf_filtered ("Received packet: %s\n", buf
);
3548 _initialize_remote_mips ()
3550 /* Initialize the fields in mips_ops that are common to all four targets. */
3551 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3552 mips_ops
.to_close
= mips_close
;
3553 mips_ops
.to_detach
= mips_detach
;
3554 mips_ops
.to_resume
= mips_resume
;
3555 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3556 mips_ops
.to_store_registers
= mips_store_registers
;
3557 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3558 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3559 mips_ops
.to_files_info
= mips_files_info
;
3560 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3561 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3562 mips_ops
.to_kill
= mips_kill
;
3563 mips_ops
.to_load
= mips_load
;
3564 mips_ops
.to_create_inferior
= mips_create_inferior
;
3565 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3566 mips_ops
.to_stratum
= process_stratum
;
3567 mips_ops
.to_has_all_memory
= 1;
3568 mips_ops
.to_has_memory
= 1;
3569 mips_ops
.to_has_stack
= 1;
3570 mips_ops
.to_has_registers
= 1;
3571 mips_ops
.to_has_execution
= 1;
3572 mips_ops
.to_magic
= OPS_MAGIC
;
3574 /* Copy the common fields to all four target vectors. */
3575 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3577 /* Initialize target-specific fields in the target vectors. */
3578 mips_ops
.to_shortname
= "mips";
3579 mips_ops
.to_doc
= "\
3580 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3581 The argument is the device it is connected to or, if it contains a colon,\n\
3582 HOST:PORT to access a board over a network";
3583 mips_ops
.to_open
= mips_open
;
3584 mips_ops
.to_wait
= mips_wait
;
3586 pmon_ops
.to_shortname
= "pmon";
3587 pmon_ops
.to_doc
= "\
3588 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3589 line. The argument is the device it is connected to or, if it contains a\n\
3590 colon, HOST:PORT to access a board over a network";
3591 pmon_ops
.to_open
= pmon_open
;
3592 pmon_ops
.to_wait
= mips_wait
;
3594 ddb_ops
.to_shortname
= "ddb";
3596 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3597 line. The first argument is the device it is connected to or, if it contains\n\
3598 a colon, HOST:PORT to access a board over a network. The optional second\n\
3599 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3600 TFTP downloads to the board. The optional third parameter is the local name\n\
3601 of the TFTP temporary file, if it differs from the filename seen by the board.";
3602 ddb_ops
.to_open
= ddb_open
;
3603 ddb_ops
.to_wait
= mips_wait
;
3605 lsi_ops
.to_shortname
= "lsi";
3606 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3607 lsi_ops
.to_open
= lsi_open
;
3608 lsi_ops
.to_wait
= mips_wait
;
3610 /* Add the targets. */
3611 add_target (&mips_ops
);
3612 add_target (&pmon_ops
);
3613 add_target (&ddb_ops
);
3614 add_target (&lsi_ops
);
3617 add_set_cmd ("timeout", no_class
, var_zinteger
,
3618 (char *) &mips_receive_wait
,
3619 "Set timeout in seconds for remote MIPS serial I/O.",
3624 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3625 (char *) &mips_retransmit_wait
,
3626 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3627 This is the number of seconds to wait for an acknowledgement to a packet\n\
3628 before resending the packet.", &setlist
),
3632 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3633 (char *) &mips_syn_garbage
,
3634 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3635 This is the maximum number of characters GDB will ignore when trying to\n\
3636 synchronize with the remote system. A value of -1 means that there is no limit\n\
3637 (Note that these characters are printed out even though they are ignored.)",
3642 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3643 (char *) &mips_monitor_prompt
,
3644 "Set the prompt that GDB expects from the monitor.",
3649 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3650 (char *)&monitor_warnings
,
3651 "Set printing of monitor warnings.\n"
3652 "When enabled, monitor warnings about hardware breakpoints "
3653 "will be displayed.",
3657 add_com ("pmon <command>", class_obscure
, pmon_command
,
3658 "Send a packet to PMON (must be in debug mode).");