1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
32 #include "remote-utils.h"
33 #include "gdb_string.h"
36 #include <sys/types.h>
41 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
43 #define S_IROTH S_IREAD
48 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
49 types passed by breakpoint.c to target_insert_watchpoint.
50 Value 3 is our own invention, and is used for ordinary instruction
51 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
61 /* Prototypes for local functions. */
63 static int mips_readchar (int timeout
);
65 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
68 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
69 int *pch
, int timeout
);
71 static int mips_cksum (const unsigned char *hdr
,
72 const unsigned char *data
, int len
);
74 static void mips_send_packet (const char *s
, int get_ack
);
76 static void mips_send_command (const char *cmd
, int prompt
);
78 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
80 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
81 int *perr
, int timeout
, char *buff
);
83 static void mips_initialize (void);
85 static void mips_open (char *name
, int from_tty
);
87 static void pmon_open (char *name
, int from_tty
);
89 static void ddb_open (char *name
, int from_tty
);
91 static void lsi_open (char *name
, int from_tty
);
93 static void mips_close (int quitting
);
95 static void mips_detach (char *args
, int from_tty
);
97 static void mips_resume (int pid
, int step
, enum target_signal siggnal
);
99 static int mips_wait (int pid
, struct target_waitstatus
*status
);
101 static int mips_map_regno (int regno
);
103 static void mips_fetch_registers (int regno
);
105 static void mips_prepare_to_store (void);
107 static void mips_store_registers (int regno
);
109 static unsigned int mips_fetch_word (CORE_ADDR addr
);
111 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
114 static int mips_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
,
115 int write
, struct target_ops
*ignore
);
117 static void mips_files_info (struct target_ops
*ignore
);
119 static void mips_create_inferior (char *execfile
, char *args
, char **env
);
121 static void mips_mourn_inferior (void);
123 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
);
125 static int pmon_zeroset (int recsize
, char **buff
, int *amount
,
126 unsigned int *chksum
);
128 static int pmon_checkset (int recsize
, char **buff
, int *value
);
130 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
131 int *inptr
, int inamount
, int *recsize
,
132 unsigned int *csum
, unsigned int *zerofill
);
134 static int pmon_check_ack (char *mesg
);
136 static void pmon_start_download (void);
138 static void pmon_end_download (int final
, int bintotal
);
140 static void pmon_download (char *buffer
, int length
);
142 static void pmon_load_fast (char *file
);
144 static void mips_load (char *file
, int from_tty
);
146 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
147 unsigned char *myaddr
, int len
);
149 static int set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
151 static int clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
153 static int common_breakpoint (int set
, CORE_ADDR addr
, int len
,
154 enum break_type type
);
156 /* Forward declarations. */
157 extern struct target_ops mips_ops
;
158 extern struct target_ops pmon_ops
;
159 extern struct target_ops ddb_ops
;
161 /* The MIPS remote debugging interface is built on top of a simple
162 packet protocol. Each packet is organized as follows:
164 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
165 may not appear anywhere else in the packet. Any time a SYN is
166 seen, a new packet should be assumed to have begun.
169 This byte contains the upper five bits of the logical length
170 of the data section, plus a single bit indicating whether this
171 is a data packet or an acknowledgement. The documentation
172 indicates that this bit is 1 for a data packet, but the actual
173 board uses 1 for an acknowledgement. The value of the byte is
174 0x40 + (ack ? 0x20 : 0) + (len >> 6)
175 (we always have 0 <= len < 1024). Acknowledgement packets do
176 not carry data, and must have a data length of 0.
178 LEN1 This byte contains the lower six bits of the logical length of
179 the data section. The value is
182 SEQ This byte contains the six bit sequence number of the packet.
185 An acknowlegment packet contains the sequence number of the
186 packet being acknowledged plus 1 modulo 64. Data packets are
187 transmitted in sequence. There may only be one outstanding
188 unacknowledged data packet at a time. The sequence numbers
189 are independent in each direction. If an acknowledgement for
190 the previous packet is received (i.e., an acknowledgement with
191 the sequence number of the packet just sent) the packet just
192 sent should be retransmitted. If no acknowledgement is
193 received within a timeout period, the packet should be
194 retransmitted. This has an unfortunate failure condition on a
195 high-latency line, as a delayed acknowledgement may lead to an
196 endless series of duplicate packets.
198 DATA The actual data bytes follow. The following characters are
199 escaped inline with DLE (ASCII 020, or ^P):
205 The additional DLE characters are not counted in the logical
206 length stored in the TYPE_LEN and LEN1 bytes.
211 These bytes contain an 18 bit checksum of the complete
212 contents of the packet excluding the SEQ byte and the
213 CSUM[123] bytes. The checksum is simply the twos complement
214 addition of all the bytes treated as unsigned characters. The
215 values of the checksum bytes are:
216 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
217 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
218 CSUM3: 0x40 + (cksum & 0x3f)
220 It happens that the MIPS remote debugging protocol always
221 communicates with ASCII strings. Because of this, this
222 implementation doesn't bother to handle the DLE quoting mechanism,
223 since it will never be required. */
227 /* The SYN character which starts each packet. */
230 /* The 0x40 used to offset each packet (this value ensures that all of
231 the header and trailer bytes, other than SYN, are printable ASCII
233 #define HDR_OFFSET 0x40
235 /* The indices of the bytes in the packet header. */
236 #define HDR_INDX_SYN 0
237 #define HDR_INDX_TYPE_LEN 1
238 #define HDR_INDX_LEN1 2
239 #define HDR_INDX_SEQ 3
242 /* The data/ack bit in the TYPE_LEN header byte. */
243 #define TYPE_LEN_DA_BIT 0x20
244 #define TYPE_LEN_DATA 0
245 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
247 /* How to compute the header bytes. */
248 #define HDR_SET_SYN(data, len, seq) (SYN)
249 #define HDR_SET_TYPE_LEN(data, len, seq) \
251 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
252 + (((len) >> 6) & 0x1f))
253 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
254 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
256 /* Check that a header byte is reasonable. */
257 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
259 /* Get data from the header. These macros evaluate their argument
261 #define HDR_IS_DATA(hdr) \
262 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
263 #define HDR_GET_LEN(hdr) \
264 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
265 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
267 /* The maximum data length. */
268 #define DATA_MAXLEN 1023
270 /* The trailer offset. */
271 #define TRLR_OFFSET HDR_OFFSET
273 /* The indices of the bytes in the packet trailer. */
274 #define TRLR_INDX_CSUM1 0
275 #define TRLR_INDX_CSUM2 1
276 #define TRLR_INDX_CSUM3 2
277 #define TRLR_LENGTH 3
279 /* How to compute the trailer bytes. */
280 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
281 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
282 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
284 /* Check that a trailer byte is reasonable. */
285 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
287 /* Get data from the trailer. This evaluates its argument multiple
289 #define TRLR_GET_CKSUM(trlr) \
290 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
291 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
292 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
294 /* The sequence number modulos. */
295 #define SEQ_MODULOS (64)
297 /* PMON commands to load from the serial port or UDP socket. */
298 #define LOAD_CMD "load -b -s tty0\r"
299 #define LOAD_CMD_UDP "load -b -s udp\r"
301 /* The target vectors for the four different remote MIPS targets.
302 These are initialized with code in _initialize_remote_mips instead
303 of static initializers, to make it easier to extend the target_ops
305 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
307 enum mips_monitor_type
309 /* IDT/SIM monitor being used: */
311 /* PMON monitor being used: */
312 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
313 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
314 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
315 /* Last and unused value, for sizing vectors, etc. */
318 static enum mips_monitor_type mips_monitor
= MON_LAST
;
320 /* The monitor prompt text. If the user sets the PMON prompt
321 to some new value, the GDB `set monitor-prompt' command must also
322 be used to inform GDB about the expected prompt. Otherwise, GDB
323 will not be able to connect to PMON in mips_initialize().
324 If the `set monitor-prompt' command is not used, the expected
325 default prompt will be set according the target:
332 static char *mips_monitor_prompt
;
334 /* Set to 1 if the target is open. */
335 static int mips_is_open
;
337 /* Currently active target description (if mips_is_open == 1) */
338 static struct target_ops
*current_ops
;
340 /* Set to 1 while the connection is being initialized. */
341 static int mips_initializing
;
343 /* Set to 1 while the connection is being brought down. */
344 static int mips_exiting
;
346 /* The next sequence number to send. */
347 static unsigned int mips_send_seq
;
349 /* The next sequence number we expect to receive. */
350 static unsigned int mips_receive_seq
;
352 /* The time to wait before retransmitting a packet, in seconds. */
353 static int mips_retransmit_wait
= 3;
355 /* The number of times to try retransmitting a packet before giving up. */
356 static int mips_send_retries
= 10;
358 /* The number of garbage characters to accept when looking for an
359 SYN for the next packet. */
360 static int mips_syn_garbage
= 10;
362 /* The time to wait for a packet, in seconds. */
363 static int mips_receive_wait
= 5;
365 /* Set if we have sent a packet to the board but have not yet received
367 static int mips_need_reply
= 0;
369 /* Handle used to access serial I/O stream. */
370 static serial_t mips_desc
;
372 /* UDP handle used to download files to target. */
373 static serial_t udp_desc
;
374 static int udp_in_use
;
376 /* TFTP filename used to download files to DDB board, in the form
378 static char *tftp_name
; /* host:filename */
379 static char *tftp_localname
; /* filename portion of above */
380 static int tftp_in_use
;
381 static FILE *tftp_file
;
383 /* Counts the number of times the user tried to interrupt the target (usually
385 static int interrupt_count
;
387 /* If non-zero, means that the target is running. */
388 static int mips_wait_flag
= 0;
390 /* If non-zero, monitor supports breakpoint commands. */
391 static int monitor_supports_breakpoints
= 0;
393 /* Data cache header. */
395 #if 0 /* not used (yet?) */
396 static DCACHE
*mips_dcache
;
399 /* Non-zero means that we've just hit a read or write watchpoint */
400 static int hit_watchpoint
;
402 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
403 The table is indexed by a breakpoint number, which is an integer
404 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
406 #define MAX_LSI_BREAKPOINTS 256
407 struct lsi_breakpoint_info
409 enum break_type type
; /* type of breakpoint */
410 CORE_ADDR addr
; /* address of breakpoint */
411 int len
; /* length of region being watched */
412 unsigned long value
; /* value to watch */
414 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
416 /* Error/warning codes returned by LSI PMON for breakpoint commands.
417 Warning values may be ORed together; error values may not. */
418 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
419 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
420 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
421 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
423 #define E_ERR 0x200 /* This bit is set if the error code is an error */
424 #define E_BPT 0x200 /* error: No such breakpoint number */
425 #define E_RGE 0x201 /* error: Range is not supported */
426 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
427 #define E_OUT 0x203 /* error: Out of hardware resources */
428 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
432 int code
; /* error code */
433 char *string
; /* string associated with this code */
436 struct lsi_error lsi_warning_table
[] =
438 {W_MSK
, "Range feature is supported via mask"},
439 {W_VAL
, "Value check is not supported in hardware"},
440 {W_QAL
, "Requested qualifiers are not supported in hardware"},
444 struct lsi_error lsi_error_table
[] =
446 {E_BPT
, "No such breakpoint number"},
447 {E_RGE
, "Range is not supported"},
448 {E_QAL
, "The requested qualifiers can not be used"},
449 {E_OUT
, "Out of hardware resources"},
450 {E_NON
, "Hardware breakpoint not supported"},
454 /* Set to 1 with the 'set monitor-warnings' command to enable printing
455 of warnings returned by PMON when hardware breakpoints are used. */
456 static int monitor_warnings
;
463 SERIAL_CLOSE (mips_desc
);
467 SERIAL_CLOSE (udp_desc
);
473 /* Handle low-level error that we can't recover from. Note that just
474 error()ing out from target_wait or some such low-level place will cause
475 all hell to break loose--the rest of GDB will tend to get left in an
476 inconsistent state. */
479 mips_error (char *string
,...)
483 va_start (args
, string
);
485 target_terminal_ours ();
486 wrap_here (""); /* Force out any buffered output */
487 gdb_flush (gdb_stdout
);
489 fprintf_filtered (gdb_stderr
, error_pre_print
);
490 vfprintf_filtered (gdb_stderr
, string
, args
);
491 fprintf_filtered (gdb_stderr
, "\n");
493 gdb_flush (gdb_stderr
);
495 /* Clean up in such a way that mips_close won't try to talk to the
496 board (it almost surely won't work since we weren't able to talk to
500 printf_unfiltered ("Ending remote MIPS debugging.\n");
501 target_mourn_inferior ();
503 return_to_top_level (RETURN_ERROR
);
506 /* putc_readable - print a character, displaying non-printable chars in
507 ^x notation or in hex. */
510 fputc_readable (int ch
, struct ui_file
*file
)
513 fputc_unfiltered ('\n', file
);
515 fprintf_unfiltered (file
, "\\r");
516 else if (ch
< 0x20) /* ASCII control character */
517 fprintf_unfiltered (file
, "^%c", ch
+ '@');
518 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
519 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
521 fputc_unfiltered (ch
, file
);
525 /* puts_readable - print a string, displaying non-printable chars in
526 ^x notation or in hex. */
529 fputs_readable (char *string
, struct ui_file
*file
)
533 while ((c
= *string
++) != '\0')
534 fputc_readable (c
, file
);
538 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
539 timed out. TIMEOUT specifies timeout value in seconds.
543 mips_expect_timeout (char *string
, int timeout
)
549 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
550 fputs_readable (string
, gdb_stdlog
);
551 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
559 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
560 were waiting for the mips_monitor_prompt... */
562 c
= SERIAL_READCHAR (mips_desc
, timeout
);
564 if (c
== SERIAL_TIMEOUT
)
567 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
572 fputc_readable (c
, gdb_stdlog
);
580 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
593 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
594 timed out. The timeout value is hard-coded to 2 seconds. Use
595 mips_expect_timeout if a different timeout value is needed.
599 mips_expect (char *string
)
601 return mips_expect_timeout (string
, 2);
604 /* Read the required number of characters into the given buffer (which
605 is assumed to be large enough). The only failure is a timeout. */
607 mips_getstring (char *string
, int n
)
615 c
= SERIAL_READCHAR (mips_desc
, 2);
617 if (c
== SERIAL_TIMEOUT
)
619 fprintf_unfiltered (gdb_stderr
,
620 "Failed to read %d characters from target (TIMEOUT)\n", n
);
631 /* Read a character from the remote, aborting on error. Returns
632 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
633 returns). FIXME: If we see the string mips_monitor_prompt from
634 the board, then we are debugging on the main console port, and we
635 have somehow dropped out of remote debugging mode. In this case,
636 we automatically go back in to remote debugging mode. This is a
637 hack, put in because I can't find any way for a program running on
638 the remote board to terminate without also ending remote debugging
639 mode. I assume users won't have any trouble with this; for one
640 thing, the IDT documentation generally assumes that the remote
641 debugging port is not the console port. This is, however, very
642 convenient for DejaGnu when you only have one connected serial
646 mips_readchar (int timeout
)
649 static int state
= 0;
650 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
656 if (i
== -1 && watchdog
> 0)
660 if (state
== mips_monitor_prompt_len
)
662 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
664 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
666 target_mourn_inferior ();
667 error ("Watchdog has expired. Target detached.\n");
670 if (ch
== SERIAL_EOF
)
671 mips_error ("End of file from remote");
672 if (ch
== SERIAL_ERROR
)
673 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
674 if (remote_debug
> 1)
676 /* Don't use _filtered; we can't deal with a QUIT out of
677 target_wait, and I think this might be called from there. */
678 if (ch
!= SERIAL_TIMEOUT
)
679 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
681 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
684 /* If we have seen mips_monitor_prompt and we either time out, or
685 we see a @ (which was echoed from a packet we sent), reset the
686 board as described above. The first character in a packet after
687 the SYN (which is not echoed) is always an @ unless the packet is
688 more than 64 characters long, which ours never are. */
689 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
690 && state
== mips_monitor_prompt_len
691 && !mips_initializing
694 if (remote_debug
> 0)
695 /* Don't use _filtered; we can't deal with a QUIT out of
696 target_wait, and I think this might be called from there. */
697 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
704 /* At this point, about the only thing we can do is abort the command
705 in progress and get back to command level as quickly as possible. */
707 error ("Remote board reset, debug protocol re-initialized.");
710 if (ch
== mips_monitor_prompt
[state
])
718 /* Get a packet header, putting the data in the supplied buffer.
719 PGARBAGE is a pointer to the number of garbage characters received
720 so far. CH is the last character received. Returns 0 for success,
721 or -1 for timeout. */
724 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
730 /* Wait for a SYN. mips_syn_garbage is intended to prevent
731 sitting here indefinitely if the board sends us one garbage
732 character per second. ch may already have a value from the
733 last time through the loop. */
736 ch
= mips_readchar (timeout
);
737 if (ch
== SERIAL_TIMEOUT
)
741 /* Printing the character here lets the user of gdb see
742 what the program is outputting, if the debugging is
743 being done on the console port. Don't use _filtered:
744 we can't deal with a QUIT out of target_wait and
745 buffered target output confuses the user. */
746 if (!mips_initializing
|| remote_debug
> 0)
748 if (isprint (ch
) || isspace (ch
))
750 fputc_unfiltered (ch
, gdb_stdtarg
);
754 fputc_readable (ch
, gdb_stdtarg
);
756 gdb_flush (gdb_stdtarg
);
759 /* Only count unprintable characters. */
760 if (! (isprint (ch
) || isspace (ch
)))
763 if (mips_syn_garbage
> 0
764 && *pgarbage
> mips_syn_garbage
)
765 mips_error ("Debug protocol failure: more than %d characters before a sync.",
770 /* Get the packet header following the SYN. */
771 for (i
= 1; i
< HDR_LENGTH
; i
++)
773 ch
= mips_readchar (timeout
);
774 if (ch
== SERIAL_TIMEOUT
)
776 /* Make sure this is a header byte. */
777 if (ch
== SYN
|| !HDR_CHECK (ch
))
783 /* If we got the complete header, we can return. Otherwise we
784 loop around and keep looking for SYN. */
790 /* Get a packet header, putting the data in the supplied buffer.
791 PGARBAGE is a pointer to the number of garbage characters received
792 so far. The last character read is returned in *PCH. Returns 0
793 for success, -1 for timeout, -2 for error. */
796 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
, int *pch
, int timeout
)
801 for (i
= 0; i
< TRLR_LENGTH
; i
++)
803 ch
= mips_readchar (timeout
);
805 if (ch
== SERIAL_TIMEOUT
)
807 if (!TRLR_CHECK (ch
))
814 /* Get the checksum of a packet. HDR points to the packet header.
815 DATA points to the packet data. LEN is the length of DATA. */
818 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
820 register const unsigned char *p
;
826 /* The initial SYN is not included in the checksum. */
840 /* Send a packet containing the given ASCII string. */
843 mips_send_packet (const char *s
, int get_ack
)
845 /* unsigned */ int len
;
846 unsigned char *packet
;
851 if (len
> DATA_MAXLEN
)
852 mips_error ("MIPS protocol data packet too long: %s", s
);
854 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
856 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
857 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
858 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
859 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
861 memcpy (packet
+ HDR_LENGTH
, s
, len
);
863 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
864 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
865 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
866 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
868 /* Increment the sequence number. This will set mips_send_seq to
869 the sequence number we expect in the acknowledgement. */
870 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
872 /* We can only have one outstanding data packet, so we just wait for
873 the acknowledgement here. Keep retransmitting the packet until
874 we get one, or until we've tried too many times. */
875 for (try = 0; try < mips_send_retries
; try++)
880 if (remote_debug
> 0)
882 /* Don't use _filtered; we can't deal with a QUIT out of
883 target_wait, and I think this might be called from there. */
884 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
885 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
888 if (SERIAL_WRITE (mips_desc
, packet
,
889 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
890 mips_error ("write to target failed: %s", safe_strerror (errno
));
899 unsigned char hdr
[HDR_LENGTH
+ 1];
900 unsigned char trlr
[TRLR_LENGTH
+ 1];
904 /* Get the packet header. If we time out, resend the data
906 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
912 /* If we get a data packet, assume it is a duplicate and
913 ignore it. FIXME: If the acknowledgement is lost, this
914 data packet may be the packet the remote sends after the
916 if (HDR_IS_DATA (hdr
))
920 /* Ignore any errors raised whilst attempting to ignore
923 len
= HDR_GET_LEN (hdr
);
925 for (i
= 0; i
< len
; i
++)
929 rch
= mips_readchar (2);
935 if (rch
== SERIAL_TIMEOUT
)
937 /* ignore the character */
941 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
943 /* We don't bother checking the checksum, or providing an
944 ACK to the packet. */
948 /* If the length is not 0, this is a garbled packet. */
949 if (HDR_GET_LEN (hdr
) != 0)
952 /* Get the packet trailer. */
953 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
954 mips_retransmit_wait
);
956 /* If we timed out, resend the data packet. */
960 /* If we got a bad character, reread the header. */
964 /* If the checksum does not match the trailer checksum, this
965 is a bad packet; ignore it. */
966 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
967 != TRLR_GET_CKSUM (trlr
))
970 if (remote_debug
> 0)
972 hdr
[HDR_LENGTH
] = '\0';
973 trlr
[TRLR_LENGTH
] = '\0';
974 /* Don't use _filtered; we can't deal with a QUIT out of
975 target_wait, and I think this might be called from there. */
976 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
977 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
980 /* If this ack is for the current packet, we're done. */
981 seq
= HDR_GET_SEQ (hdr
);
982 if (seq
== mips_send_seq
)
985 /* If this ack is for the last packet, resend the current
987 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
990 /* Otherwise this is a bad ack; ignore it. Increment the
991 garbage count to ensure that we do not stay in this loop
997 mips_error ("Remote did not acknowledge packet");
1000 /* Receive and acknowledge a packet, returning the data in BUFF (which
1001 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1002 implies that only the sender retransmits packets, so this code just
1003 waits silently for a packet. It returns the length of the received
1004 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1005 don't print an error message and return -1. */
1008 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1013 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1020 unsigned char hdr
[HDR_LENGTH
];
1021 unsigned char trlr
[TRLR_LENGTH
];
1025 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1028 mips_error ("Timed out waiting for remote packet");
1035 /* An acknowledgement is probably a duplicate; ignore it. */
1036 if (!HDR_IS_DATA (hdr
))
1038 len
= HDR_GET_LEN (hdr
);
1039 /* Check if the length is valid for an ACK, we may aswell
1040 try and read the remainder of the packet: */
1043 /* Ignore the error condition, since we are going to
1044 ignore the packet anyway. */
1045 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1047 /* Don't use _filtered; we can't deal with a QUIT out of
1048 target_wait, and I think this might be called from there. */
1049 if (remote_debug
> 0)
1050 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1054 len
= HDR_GET_LEN (hdr
);
1055 for (i
= 0; i
< len
; i
++)
1059 rch
= mips_readchar (timeout
);
1065 if (rch
== SERIAL_TIMEOUT
)
1068 mips_error ("Timed out waiting for remote packet");
1077 /* Don't use _filtered; we can't deal with a QUIT out of
1078 target_wait, and I think this might be called from there. */
1079 if (remote_debug
> 0)
1080 fprintf_unfiltered (gdb_stdlog
,
1081 "Got new SYN after %d chars (wanted %d)\n",
1086 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1090 mips_error ("Timed out waiting for packet");
1096 /* Don't use _filtered; we can't deal with a QUIT out of
1097 target_wait, and I think this might be called from there. */
1098 if (remote_debug
> 0)
1099 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1103 /* If this is the wrong sequence number, ignore it. */
1104 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1106 /* Don't use _filtered; we can't deal with a QUIT out of
1107 target_wait, and I think this might be called from there. */
1108 if (remote_debug
> 0)
1109 fprintf_unfiltered (gdb_stdlog
,
1110 "Ignoring sequence number %d (want %d)\n",
1111 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1115 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1118 if (remote_debug
> 0)
1119 /* Don't use _filtered; we can't deal with a QUIT out of
1120 target_wait, and I think this might be called from there. */
1121 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1122 mips_cksum (hdr
, buff
, len
),
1123 TRLR_GET_CKSUM (trlr
));
1125 /* The checksum failed. Send an acknowledgement for the
1126 previous packet to tell the remote to resend the packet. */
1127 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1128 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1129 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1130 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1132 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1134 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1135 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1136 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1138 if (remote_debug
> 0)
1140 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1141 /* Don't use _filtered; we can't deal with a QUIT out of
1142 target_wait, and I think this might be called from there. */
1143 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1147 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1150 mips_error ("write to target failed: %s", safe_strerror (errno
));
1156 if (remote_debug
> 0)
1159 /* Don't use _filtered; we can't deal with a QUIT out of
1160 target_wait, and I think this might be called from there. */
1161 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1164 /* We got the packet. Send an acknowledgement. */
1165 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1167 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1168 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1169 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1170 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1172 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1174 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1175 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1176 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1178 if (remote_debug
> 0)
1180 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1181 /* Don't use _filtered; we can't deal with a QUIT out of
1182 target_wait, and I think this might be called from there. */
1183 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1187 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1190 mips_error ("write to target failed: %s", safe_strerror (errno
));
1198 /* Optionally send a request to the remote system and optionally wait
1199 for the reply. This implements the remote debugging protocol,
1200 which is built on top of the packet protocol defined above. Each
1201 request has an ADDR argument and a DATA argument. The following
1202 requests are defined:
1204 \0 don't send a request; just wait for a reply
1205 i read word from instruction space at ADDR
1206 d read word from data space at ADDR
1207 I write DATA to instruction space at ADDR
1208 D write DATA to data space at ADDR
1209 r read register number ADDR
1210 R set register number ADDR to value DATA
1211 c continue execution (if ADDR != 1, set pc to ADDR)
1212 s single step (if ADDR != 1, set pc to ADDR)
1214 The read requests return the value requested. The write requests
1215 return the previous value in the changed location. The execution
1216 requests return a UNIX wait value (the approximate signal which
1217 caused execution to stop is in the upper eight bits).
1219 If PERR is not NULL, this function waits for a reply. If an error
1220 occurs, it sets *PERR to 1 and sets errno according to what the
1221 target board reports. */
1224 mips_request (int cmd
,
1231 char myBuff
[DATA_MAXLEN
+ 1];
1236 unsigned long rresponse
;
1238 if (buff
== (char *) NULL
)
1243 if (mips_need_reply
)
1244 internal_error ("mips_request: Trying to send command before reply");
1245 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1246 mips_send_packet (buff
, 1);
1247 mips_need_reply
= 1;
1250 if (perr
== (int *) NULL
)
1253 if (!mips_need_reply
)
1254 internal_error ("mips_request: Trying to get reply before command");
1256 mips_need_reply
= 0;
1258 len
= mips_receive_packet (buff
, 1, timeout
);
1261 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1262 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1263 || (cmd
!= '\0' && rcmd
!= cmd
))
1264 mips_error ("Bad response from remote board");
1270 /* FIXME: This will returns MIPS errno numbers, which may or may
1271 not be the same as errno values used on other systems. If
1272 they stick to common errno values, they will be the same, but
1273 if they don't, they must be translated. */
1284 mips_initialize_cleanups (PTR arg
)
1286 mips_initializing
= 0;
1290 mips_exit_cleanups (PTR arg
)
1296 mips_send_command (const char *cmd
, int prompt
)
1298 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1302 mips_expect (mips_monitor_prompt
);
1305 /* Enter remote (dbx) debug mode: */
1307 mips_enter_debug (void)
1309 /* Reset the sequence numbers, ready for the new debug sequence: */
1311 mips_receive_seq
= 0;
1313 if (mips_monitor
!= MON_IDT
)
1314 mips_send_command ("debug\r", 0);
1315 else /* assume IDT monitor by default */
1316 mips_send_command ("db tty0\r", 0);
1319 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1321 /* We don't need to absorb any spurious characters here, since the
1322 mips_receive_header will eat up a reasonable number of characters
1323 whilst looking for the SYN, however this avoids the "garbage"
1324 being displayed to the user. */
1325 if (mips_monitor
!= MON_IDT
)
1329 char buff
[DATA_MAXLEN
+ 1];
1330 if (mips_receive_packet (buff
, 1, 3) < 0)
1331 mips_error ("Failed to initialize (didn't receive packet).");
1335 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1337 mips_exit_debug (void)
1340 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1344 if (mips_monitor
!= MON_IDT
)
1346 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1347 so we do not get a reply to this command: */
1348 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1349 mips_need_reply
= 0;
1350 if (!mips_expect (" break!"))
1354 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1356 if (!mips_expect (mips_monitor_prompt
))
1359 do_cleanups (old_cleanups
);
1364 /* Initialize a new connection to the MIPS board, and make sure we are
1365 really connected. */
1368 mips_initialize (void)
1371 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1374 /* What is this code doing here? I don't see any way it can happen, and
1375 it might mean mips_initializing didn't get cleared properly.
1376 So I'll make it a warning. */
1378 if (mips_initializing
)
1380 warning ("internal error: mips_initialize called twice");
1385 mips_initializing
= 1;
1387 /* At this point, the packit protocol isn't responding. We'll try getting
1388 into the monitor, and restarting the protocol. */
1390 /* Force the system into the monitor. After this we *should* be at
1391 the mips_monitor_prompt. */
1392 if (mips_monitor
!= MON_IDT
)
1393 j
= 0; /* start by checking if we are already at the prompt */
1395 j
= 1; /* start by sending a break */
1400 case 0: /* First, try sending a CR */
1401 SERIAL_FLUSH_INPUT (mips_desc
);
1402 SERIAL_WRITE (mips_desc
, "\r", 1);
1404 case 1: /* First, try sending a break */
1405 SERIAL_SEND_BREAK (mips_desc
);
1407 case 2: /* Then, try a ^C */
1408 SERIAL_WRITE (mips_desc
, "\003", 1);
1410 case 3: /* Then, try escaping from download */
1412 if (mips_monitor
!= MON_IDT
)
1416 /* We shouldn't need to send multiple termination
1417 sequences, since the target performs line (or
1418 block) reads, and then processes those
1419 packets. In-case we were downloading a large packet
1420 we flush the output buffer before inserting a
1421 termination sequence. */
1422 SERIAL_FLUSH_OUTPUT (mips_desc
);
1423 sprintf (tbuff
, "\r/E/E\r");
1424 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1431 /* We are possibly in binary download mode, having
1432 aborted in the middle of an S-record. ^C won't
1433 work because of binary mode. The only reliable way
1434 out is to send enough termination packets (8 bytes)
1435 to fill up and then overflow the largest size
1436 S-record (255 bytes in this case). This amounts to
1440 mips_make_srec (srec
, '7', 0, NULL
, 0);
1442 for (i
= 1; i
<= 33; i
++)
1444 SERIAL_WRITE (mips_desc
, srec
, 8);
1446 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1447 break; /* Break immediatly if we get something from
1454 mips_error ("Failed to initialize.");
1457 if (mips_expect (mips_monitor_prompt
))
1461 if (mips_monitor
!= MON_IDT
)
1463 /* Sometimes PMON ignores the first few characters in the first
1464 command sent after a load. Sending a blank command gets
1466 mips_send_command ("\r", -1);
1468 /* Ensure the correct target state: */
1469 if (mips_monitor
!= MON_LSI
)
1470 mips_send_command ("set regsize 64\r", -1);
1471 mips_send_command ("set hostport tty0\r", -1);
1472 mips_send_command ("set brkcmd \"\"\r", -1);
1473 /* Delete all the current breakpoints: */
1474 mips_send_command ("db *\r", -1);
1475 /* NOTE: PMON does not have breakpoint support through the
1476 "debug" mode, only at the monitor command-line. */
1479 mips_enter_debug ();
1481 /* Clear all breakpoints: */
1482 if ((mips_monitor
== MON_IDT
1483 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1484 || mips_monitor
== MON_LSI
)
1485 monitor_supports_breakpoints
= 1;
1487 monitor_supports_breakpoints
= 0;
1489 do_cleanups (old_cleanups
);
1491 /* If this doesn't call error, we have connected; we don't care if
1492 the request itself succeeds or fails. */
1494 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1495 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1496 select_frame (get_current_frame (), 0);
1499 /* Open a connection to the remote board. */
1501 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1502 enum mips_monitor_type new_monitor
, char *new_monitor_prompt
)
1505 char *serial_port_name
;
1506 char *remote_name
= 0;
1507 char *local_name
= 0;
1512 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1513 device is attached to the target board (e.g., /dev/ttya).\n"
1514 "If you want to use TFTP to download to the board, specify the name of a\n"
1515 "temporary file to be used by GDB for downloads as the second argument.\n"
1516 "This filename must be in the form host:filename, where host is the name\n"
1517 "of the host running the TFTP server, and the file must be readable by the\n"
1518 "world. If the local name of the temporary file differs from the name as\n"
1519 "seen from the board via TFTP, specify that name as the third parameter.\n");
1521 /* Parse the serial port name, the optional TFTP name, and the
1522 optional local TFTP name. */
1523 if ((argv
= buildargv (name
)) == NULL
)
1525 make_cleanup_freeargv (argv
);
1527 serial_port_name
= strsave (argv
[0]);
1528 if (argv
[1]) /* remote TFTP name specified? */
1530 remote_name
= argv
[1];
1531 if (argv
[2]) /* local TFTP filename specified? */
1532 local_name
= argv
[2];
1535 target_preopen (from_tty
);
1538 unpush_target (current_ops
);
1540 /* Open and initialize the serial port. */
1541 mips_desc
= SERIAL_OPEN (serial_port_name
);
1542 if (mips_desc
== (serial_t
) NULL
)
1543 perror_with_name (serial_port_name
);
1545 if (baud_rate
!= -1)
1547 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1549 SERIAL_CLOSE (mips_desc
);
1550 perror_with_name (serial_port_name
);
1554 SERIAL_RAW (mips_desc
);
1556 /* Open and initialize the optional download port. If it is in the form
1557 hostname#portnumber, it's a UDP socket. If it is in the form
1558 hostname:filename, assume it's the TFTP filename that must be
1559 passed to the DDB board to tell it where to get the load file. */
1562 if (strchr (remote_name
, '#'))
1564 udp_desc
= SERIAL_OPEN (remote_name
);
1566 perror_with_name ("Unable to open UDP port");
1571 /* Save the remote and local names of the TFTP temp file. If
1572 the user didn't specify a local name, assume it's the same
1573 as the part of the remote name after the "host:". */
1577 free (tftp_localname
);
1578 if (local_name
== NULL
)
1579 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1580 local_name
++; /* skip over the colon */
1581 if (local_name
== NULL
)
1582 local_name
= remote_name
; /* local name same as remote name */
1583 tftp_name
= strsave (remote_name
);
1584 tftp_localname
= strsave (local_name
);
1592 /* Reset the expected monitor prompt if it's never been set before. */
1593 if (mips_monitor_prompt
== NULL
)
1594 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1595 mips_monitor
= new_monitor
;
1600 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1602 /* Switch to using remote target now. */
1605 /* FIXME: Should we call start_remote here? */
1607 /* Try to figure out the processor model if possible. */
1608 ptype
= mips_read_processor_type ();
1610 mips_set_processor_type_command (strsave (ptype
), 0);
1612 /* This is really the job of start_remote however, that makes an assumption
1613 that the target is about to print out a status message of some sort. That
1614 doesn't happen here (in fact, it may not be possible to get the monitor to
1615 send the appropriate packet). */
1617 flush_cached_frames ();
1618 registers_changed ();
1619 stop_pc
= read_pc ();
1620 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1621 select_frame (get_current_frame (), 0);
1622 print_stack_frame (selected_frame
, -1, 1);
1623 free (serial_port_name
);
1627 mips_open (char *name
, int from_tty
)
1629 const char *monitor_prompt
= NULL
;
1630 if (TARGET_ARCHITECTURE
!= NULL
1631 && TARGET_ARCHITECTURE
->arch
== bfd_arch_mips
)
1633 switch (TARGET_ARCHITECTURE
->mach
)
1635 case bfd_mach_mips4100
:
1636 case bfd_mach_mips4300
:
1637 case bfd_mach_mips4600
:
1638 case bfd_mach_mips4650
:
1639 case bfd_mach_mips5000
:
1640 monitor_prompt
= "<RISQ> ";
1644 if (monitor_prompt
== NULL
)
1645 monitor_prompt
= "<IDT>";
1646 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1650 pmon_open (char *name
, int from_tty
)
1652 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1656 ddb_open (char *name
, int from_tty
)
1658 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1662 lsi_open (char *name
, int from_tty
)
1666 /* Clear the LSI breakpoint table. */
1667 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1668 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1670 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1673 /* Close a connection to the remote board. */
1676 mips_close (int quitting
)
1680 /* Get the board out of remote debugging mode. */
1681 (void) mips_exit_debug ();
1687 /* Detach from the remote board. */
1690 mips_detach (char *args
, int from_tty
)
1693 error ("Argument given to \"detach\" when remotely debugging.");
1700 printf_unfiltered ("Ending remote MIPS debugging.\n");
1703 /* Tell the target board to resume. This does not wait for a reply
1704 from the board, except in the case of single-stepping on LSI boards,
1705 where PMON does return a reply. */
1708 mips_resume (int pid
, int step
, enum target_signal siggnal
)
1712 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1713 a single step, so we wait for that. */
1714 mips_request (step
? 's' : 'c', 1, siggnal
,
1715 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1716 mips_receive_wait
, NULL
);
1719 /* Return the signal corresponding to SIG, where SIG is the number which
1720 the MIPS protocol uses for the signal. */
1722 mips_signal_from_protocol (int sig
)
1724 /* We allow a few more signals than the IDT board actually returns, on
1725 the theory that there is at least *some* hope that perhaps the numbering
1726 for these signals is widely agreed upon. */
1729 return TARGET_SIGNAL_UNKNOWN
;
1731 /* Don't want to use target_signal_from_host because we are converting
1732 from MIPS signal numbers, not host ones. Our internal numbers
1733 match the MIPS numbers for the signals the board can return, which
1734 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1735 return (enum target_signal
) sig
;
1738 /* Wait until the remote stops, and return a wait status. */
1741 mips_wait (int pid
, struct target_waitstatus
*status
)
1745 char buff
[DATA_MAXLEN
];
1751 interrupt_count
= 0;
1754 /* If we have not sent a single step or continue command, then the
1755 board is waiting for us to do something. Return a status
1756 indicating that it is stopped. */
1757 if (!mips_need_reply
)
1759 status
->kind
= TARGET_WAITKIND_STOPPED
;
1760 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1764 /* No timeout; we sit here as long as the program continues to execute. */
1766 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1769 mips_error ("Remote failure: %s", safe_strerror (errno
));
1771 /* On returning from a continue, the PMON monitor seems to start
1772 echoing back the messages we send prior to sending back the
1773 ACK. The code can cope with this, but to try and avoid the
1774 unnecessary serial traffic, and "spurious" characters displayed
1775 to the user, we cheat and reset the debug protocol. The problems
1776 seems to be caused by a check on the number of arguments, and the
1777 command length, within the monitor causing it to echo the command
1779 if (mips_monitor
== MON_PMON
)
1782 mips_enter_debug ();
1785 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1787 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1788 &rpc
, &rfp
, &rsp
, flags
);
1791 char buf
[MAX_REGISTER_RAW_SIZE
];
1793 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1794 supply_register (PC_REGNUM
, buf
);
1796 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1797 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1799 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1800 supply_register (SP_REGNUM
, buf
);
1802 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1803 supply_register (FP_REGNUM
, buf
);
1809 for (i
= 0; i
<= 2; i
++)
1810 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1812 else if (flags
[i
] == '\000')
1817 if (strcmp (target_shortname
, "lsi") == 0)
1820 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1821 Right now, PMON doesn't give us enough information to determine which
1822 breakpoint we hit. So we have to look up the PC in our own table
1823 of breakpoints, and if found, assume it's just a normal instruction
1824 fetch breakpoint, not a data watchpoint. FIXME when PMON
1825 provides some way to tell us what type of breakpoint it is. */
1827 CORE_ADDR pc
= read_pc ();
1830 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1832 if (lsi_breakpoints
[i
].addr
== pc
1833 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1840 /* If a data breakpoint was hit, PMON returns the following packet:
1842 The return packet from an ordinary breakpoint doesn't have the
1843 extra 0x01 field tacked onto the end. */
1844 if (nfields
== 1 && rpc
== 1)
1849 /* NOTE: The following (sig) numbers are defined by PMON:
1850 SPP_SIGTRAP 5 breakpoint
1858 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1859 and so on, because the constants we want here are determined by the
1860 MIPS protocol and have nothing to do with what host we are running on. */
1861 if ((rstatus
& 0xff) == 0)
1863 status
->kind
= TARGET_WAITKIND_EXITED
;
1864 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1866 else if ((rstatus
& 0xff) == 0x7f)
1868 status
->kind
= TARGET_WAITKIND_STOPPED
;
1869 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1871 /* If the stop PC is in the _exit function, assume
1872 we hit the 'break 0x3ff' instruction in _exit, so this
1873 is not a normal breakpoint. */
1874 if (strcmp (target_shortname
, "lsi") == 0)
1877 CORE_ADDR func_start
;
1878 CORE_ADDR pc
= read_pc ();
1880 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1881 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1882 && func_start
== pc
)
1883 status
->kind
= TARGET_WAITKIND_EXITED
;
1888 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1889 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1895 /* We have to map between the register numbers used by gdb and the
1896 register numbers used by the debugging protocol. This function
1897 assumes that we are using tm-mips.h. */
1899 #define REGNO_OFFSET 96
1902 mips_map_regno (int regno
)
1906 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1907 return regno
- FP0_REGNUM
+ 32;
1911 return REGNO_OFFSET
+ 0;
1913 return REGNO_OFFSET
+ 1;
1915 return REGNO_OFFSET
+ 2;
1917 return REGNO_OFFSET
+ 3;
1919 return REGNO_OFFSET
+ 4;
1921 return REGNO_OFFSET
+ 5;
1923 /* FIXME: Is there a way to get the status register? */
1928 /* Fetch the remote registers. */
1931 mips_fetch_registers (int regno
)
1933 unsigned LONGEST val
;
1938 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1939 mips_fetch_registers (regno
);
1943 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1944 /* FP_REGNUM on the mips is a hack which is just supposed to read
1945 zero (see also mips-nat.c). */
1949 /* If PMON doesn't support this register, don't waste serial
1950 bandwidth trying to read it. */
1951 int pmon_reg
= mips_map_regno (regno
);
1952 if (regno
!= 0 && pmon_reg
== 0)
1956 /* Unfortunately the PMON version in the Vr4300 board has been
1957 compiled without the 64bit register access commands. This
1958 means we cannot get hold of the full register width. */
1959 if (mips_monitor
== MON_DDB
)
1960 val
= (unsigned) mips_request ('t', pmon_reg
, 0,
1961 &err
, mips_receive_wait
, NULL
);
1963 val
= mips_request ('r', pmon_reg
, 0,
1964 &err
, mips_receive_wait
, NULL
);
1966 mips_error ("Can't read register %d: %s", regno
,
1967 safe_strerror (errno
));
1972 char buf
[MAX_REGISTER_RAW_SIZE
];
1974 /* We got the number the register holds, but gdb expects to see a
1975 value in the target byte ordering. */
1976 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
1977 supply_register (regno
, buf
);
1981 /* Prepare to store registers. The MIPS protocol can store individual
1982 registers, so this function doesn't have to do anything. */
1985 mips_prepare_to_store (void)
1989 /* Store remote register(s). */
1992 mips_store_registers (int regno
)
1998 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1999 mips_store_registers (regno
);
2003 mips_request ('R', mips_map_regno (regno
),
2004 read_register (regno
),
2005 &err
, mips_receive_wait
, NULL
);
2007 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2010 /* Fetch a word from the target board. */
2013 mips_fetch_word (CORE_ADDR addr
)
2018 val
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2021 /* Data space failed; try instruction space. */
2022 val
= mips_request ('i', addr
, 0, &err
,
2023 mips_receive_wait
, NULL
);
2025 mips_error ("Can't read address 0x%s: %s",
2026 paddr_nz (addr
), safe_strerror (errno
));
2031 /* Store a word to the target board. Returns errno code or zero for
2032 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2033 memory location there. */
2035 /* FIXME! make sure only 32-bit quantities get stored! */
2037 mips_store_word (CORE_ADDR addr
, unsigned int val
, char *old_contents
)
2040 unsigned int oldcontents
;
2042 oldcontents
= mips_request ('D', addr
, val
, &err
,
2043 mips_receive_wait
, NULL
);
2046 /* Data space failed; try instruction space. */
2047 oldcontents
= mips_request ('I', addr
, val
, &err
,
2048 mips_receive_wait
, NULL
);
2052 if (old_contents
!= NULL
)
2053 store_unsigned_integer (old_contents
, 4, oldcontents
);
2057 /* Read or write LEN bytes from inferior memory at MEMADDR,
2058 transferring to or from debugger address MYADDR. Write to inferior
2059 if SHOULD_WRITE is nonzero. Returns length of data written or
2060 read; 0 for error. Note that protocol gives us the correct value
2061 for a longword, since it transfers values in ASCII. We want the
2062 byte values, so we have to swap the longword values. */
2064 static int mask_address_p
= 1;
2067 mips_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
2068 struct target_ops
*ignore
)
2076 /* PMON targets do not cope well with 64 bit addresses. Mask the
2077 value down to 32 bits. */
2079 memaddr
&= (CORE_ADDR
) 0xffffffff;
2081 /* Round starting address down to longword boundary. */
2082 addr
= memaddr
& ~3;
2083 /* Round ending address up; get number of longwords that makes. */
2084 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2085 /* Allocate buffer of that many longwords. */
2086 buffer
= alloca (count
* 4);
2090 /* Fill start and end extra bytes of buffer with existing data. */
2091 if (addr
!= memaddr
|| len
< 4)
2093 /* Need part of initial word -- fetch it. */
2094 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2099 /* Need part of last word -- fetch it. FIXME: we do this even
2100 if we don't need it. */
2101 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2102 mips_fetch_word (addr
+ (count
- 1) * 4));
2105 /* Copy data to be written over corresponding part of buffer */
2107 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2109 /* Write the entire buffer. */
2111 for (i
= 0; i
< count
; i
++, addr
+= 4)
2113 status
= mips_store_word (addr
,
2114 extract_unsigned_integer (&buffer
[i
* 4], 4),
2116 /* Report each kilobyte (we download 32-bit words at a time) */
2119 printf_unfiltered ("*");
2120 gdb_flush (gdb_stdout
);
2127 /* FIXME: Do we want a QUIT here? */
2130 printf_unfiltered ("\n");
2134 /* Read all the longwords */
2135 for (i
= 0; i
< count
; i
++, addr
+= 4)
2137 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2141 /* Copy appropriate bytes out of the buffer. */
2142 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2147 /* Print info on this target. */
2150 mips_files_info (struct target_ops
*ignore
)
2152 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2155 /* Kill the process running on the board. This will actually only
2156 work if we are doing remote debugging over the console input. I
2157 think that if IDT/sim had the remote debug interrupt enabled on the
2158 right port, we could interrupt the process with a break signal. */
2163 if (!mips_wait_flag
)
2168 if (interrupt_count
>= 2)
2170 interrupt_count
= 0;
2172 target_terminal_ours ();
2174 if (query ("Interrupted while waiting for the program.\n\
2175 Give up (and stop debugging it)? "))
2177 /* Clean up in such a way that mips_close won't try to talk to the
2178 board (it almost surely won't work since we weren't able to talk to
2183 printf_unfiltered ("Ending remote MIPS debugging.\n");
2184 target_mourn_inferior ();
2186 return_to_top_level (RETURN_QUIT
);
2189 target_terminal_inferior ();
2192 if (remote_debug
> 0)
2193 printf_unfiltered ("Sending break\n");
2195 SERIAL_SEND_BREAK (mips_desc
);
2204 SERIAL_WRITE (mips_desc
, &cc
, 1);
2206 target_mourn_inferior ();
2211 /* Start running on the target board. */
2214 mips_create_inferior (char *execfile
, char *args
, char **env
)
2221 Can't pass arguments to remote MIPS board; arguments ignored.");
2222 /* And don't try to use them on the next "run" command. */
2223 execute_command ("set args", 0);
2226 if (execfile
== 0 || exec_bfd
== 0)
2227 error ("No executable file specified");
2229 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2231 init_wait_for_inferior ();
2233 /* FIXME: Should we set inferior_pid here? */
2235 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2238 /* Clean up after a process. Actually nothing to do. */
2241 mips_mourn_inferior (void)
2243 if (current_ops
!= NULL
)
2244 unpush_target (current_ops
);
2245 generic_mourn_inferior ();
2248 /* We can write a breakpoint and read the shadow contents in one
2251 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2252 support, we read the contents of the target location and stash it,
2253 then overwrite it with a breakpoint instruction. ADDR is the target
2254 location in the target machine. CONTENTS_CACHE is a pointer to
2255 memory allocated for saving the target contents. It is guaranteed
2256 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2257 is accomplished via BREAKPOINT_MAX). */
2260 mips_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2262 if (monitor_supports_breakpoints
)
2263 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2265 return memory_insert_breakpoint (addr
, contents_cache
);
2269 mips_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2271 if (monitor_supports_breakpoints
)
2272 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2274 return memory_remove_breakpoint (addr
, contents_cache
);
2277 #if 0 /* currently not used */
2278 /* PMON does not currently provide support for the debug mode 'b'
2279 commands to manipulate breakpoints. However, if we wanted to use
2280 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2281 then this code performs the work needed to leave debug mode,
2282 set/clear the breakpoint, and then return to debug mode. */
2284 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2285 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2286 /* NOTE: The code relies on this vector being zero-initialised by the system */
2289 pmon_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2293 if (monitor_supports_breakpoints
)
2295 char tbuff
[12]; /* space for breakpoint command */
2299 /* PMON does not support debug level breakpoint set/remove: */
2300 if (mips_exit_debug ())
2301 mips_error ("Failed to exit debug mode");
2303 sprintf (tbuff
, "b %08x\r", addr
);
2304 mips_send_command (tbuff
, 0);
2306 mips_expect ("Bpt ");
2308 if (!mips_getstring (tbuff
, 2))
2310 tbuff
[2] = '\0'; /* terminate the string */
2311 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2313 fprintf_unfiltered (gdb_stderr
,
2314 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2318 mips_expect (" = ");
2320 /* Lead in the hex number we are expecting: */
2324 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2325 which targets return 64-bit addresses? PMON returns only 32! */
2326 if (!mips_getstring (&tbuff
[2], 8))
2328 tbuff
[10] = '\0'; /* terminate the string */
2330 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2332 fprintf_unfiltered (gdb_stderr
,
2333 "Invalid hex address from target: %s\n", tbuff
);
2337 if (bpnum
>= PMON_MAX_BP
)
2339 fprintf_unfiltered (gdb_stderr
,
2340 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2341 bpnum
, PMON_MAX_BP
- 1);
2346 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2348 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2350 mips_expect ("\r\n");
2351 mips_expect (mips_monitor_prompt
);
2353 mips_enter_debug ();
2358 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2362 pmon_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2364 if (monitor_supports_breakpoints
)
2367 char tbuff
[7]; /* enough for delete breakpoint command */
2369 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2370 if (mips_pmon_bp_info
[bpnum
] == addr
)
2373 if (bpnum
>= PMON_MAX_BP
)
2375 fprintf_unfiltered (gdb_stderr
,
2376 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2381 if (mips_exit_debug ())
2382 mips_error ("Failed to exit debug mode");
2384 sprintf (tbuff
, "db %02d\r", bpnum
);
2386 mips_send_command (tbuff
, -1);
2387 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2388 set" message will be returned. */
2390 mips_enter_debug ();
2395 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2400 /* Tell whether this target can support a hardware breakpoint. CNT
2401 is the number of hardware breakpoints already installed. This
2402 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2405 remote_mips_can_use_hardware_watchpoint (int cnt
)
2407 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2411 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2412 This is used for memory ref breakpoints. */
2414 static unsigned long
2415 calculate_mask (CORE_ADDR addr
, int len
)
2420 mask
= addr
^ (addr
+ len
- 1);
2422 for (i
= 32; i
>= 0; i
--)
2428 mask
= (unsigned long) 0xffffffff >> i
;
2434 /* Insert a hardware breakpoint. This works only on LSI targets, which
2435 implement ordinary breakpoints using hardware facilities. */
2438 remote_mips_insert_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2440 if (strcmp (target_shortname
, "lsi") == 0)
2441 return mips_insert_breakpoint (addr
, contents_cache
);
2447 /* Remove a hardware breakpoint. This works only on LSI targets, which
2448 implement ordinary breakpoints using hardware facilities. */
2451 remote_mips_remove_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2453 if (strcmp (target_shortname
, "lsi") == 0)
2454 return mips_remove_breakpoint (addr
, contents_cache
);
2459 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2460 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2464 remote_mips_set_watchpoint (CORE_ADDR addr
, int len
, int type
)
2466 if (set_breakpoint (addr
, len
, type
))
2473 remote_mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
2475 if (clear_breakpoint (addr
, len
, type
))
2482 remote_mips_stopped_by_watchpoint (void)
2484 return hit_watchpoint
;
2488 /* Insert a breakpoint. */
2491 set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2493 return common_breakpoint (1, addr
, len
, type
);
2497 /* Clear a breakpoint. */
2500 clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2502 return common_breakpoint (0, addr
, len
, type
);
2506 /* Check the error code from the return packet for an LSI breakpoint
2507 command. If there's no error, just return 0. If it's a warning,
2508 print the warning text and return 0. If it's an error, print
2509 the error text and return 1. <ADDR> is the address of the breakpoint
2510 that was being set. <RERRFLG> is the error code returned by PMON.
2511 This is a helper function for common_breakpoint. */
2514 check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2516 struct lsi_error
*err
;
2517 char *saddr
= paddr_nz (addr
); /* printable address string */
2519 if (rerrflg
== 0) /* no error */
2522 /* Warnings can be ORed together, so check them all. */
2523 if (rerrflg
& W_WARN
)
2525 if (monitor_warnings
)
2528 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2530 if ((err
->code
& rerrflg
) == err
->code
)
2533 fprintf_unfiltered (gdb_stderr
,
2534 "common_breakpoint (0x%s): Warning: %s\n",
2540 fprintf_unfiltered (gdb_stderr
,
2541 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2548 /* Errors are unique, i.e. can't be ORed together. */
2549 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2551 if ((err
->code
& rerrflg
) == err
->code
)
2553 fprintf_unfiltered (gdb_stderr
,
2554 "common_breakpoint (0x%s): Error: %s\n",
2560 fprintf_unfiltered (gdb_stderr
,
2561 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2568 /* This routine sends a breakpoint command to the remote target.
2570 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2571 <ADDR> is the address of the breakpoint.
2572 <LEN> the length of the region to break on.
2573 <TYPE> is the type of breakpoint:
2574 0 = write (BREAK_WRITE)
2575 1 = read (BREAK_READ)
2576 2 = read/write (BREAK_ACCESS)
2577 3 = instruction fetch (BREAK_FETCH)
2579 Return 0 if successful; otherwise 1. */
2582 common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2584 char buf
[DATA_MAXLEN
+ 1];
2586 int rpid
, rerrflg
, rresponse
, rlen
;
2589 addr
= ADDR_BITS_REMOVE (addr
);
2591 if (mips_monitor
== MON_LSI
)
2593 if (set
== 0) /* clear breakpoint */
2595 /* The LSI PMON "clear breakpoint" has this form:
2596 <pid> 'b' <bptn> 0x0
2598 <pid> 'b' 0x0 <code>
2600 <bptn> is a breakpoint number returned by an earlier 'B' command.
2601 Possible return codes: OK, E_BPT. */
2605 /* Search for the breakpoint in the table. */
2606 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2607 if (lsi_breakpoints
[i
].type
== type
2608 && lsi_breakpoints
[i
].addr
== addr
2609 && lsi_breakpoints
[i
].len
== len
)
2612 /* Clear the table entry and tell PMON to clear the breakpoint. */
2613 if (i
== MAX_LSI_BREAKPOINTS
)
2615 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2620 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2621 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2622 mips_send_packet (buf
, 1);
2624 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2627 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2629 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2631 return (check_lsi_error (addr
, rerrflg
));
2634 /* set a breakpoint */
2636 /* The LSI PMON "set breakpoint" command has this form:
2637 <pid> 'B' <addr> 0x0
2639 <pid> 'B' <bptn> <code>
2641 The "set data breakpoint" command has this form:
2643 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2645 where: type= "0x1" = read
2647 "0x3" = access (read or write)
2649 The reply returns two values:
2650 bptn - a breakpoint number, which is a small integer with
2651 possible values of zero through 255.
2652 code - an error return code, a value of zero indicates a
2653 succesful completion, other values indicate various
2654 errors and warnings.
2656 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2660 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2663 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2669 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2670 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2671 paddr_nz (addr
+ len
- 1));
2673 mips_send_packet (buf
, 1);
2675 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2678 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2679 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2680 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2681 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2684 if (check_lsi_error (addr
, rerrflg
))
2687 /* rresponse contains PMON's breakpoint number. Record the
2688 information for this breakpoint so we can clear it later. */
2689 lsi_breakpoints
[rresponse
].type
= type
;
2690 lsi_breakpoints
[rresponse
].addr
= addr
;
2691 lsi_breakpoints
[rresponse
].len
= len
;
2698 /* On non-LSI targets, the breakpoint command has this form:
2699 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2700 <MASK> is a don't care mask for addresses.
2701 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2705 mask
= calculate_mask (addr
, len
);
2708 if (set
) /* set a breakpoint */
2713 case BREAK_WRITE
: /* write */
2716 case BREAK_READ
: /* read */
2719 case BREAK_ACCESS
: /* read/write */
2722 case BREAK_FETCH
: /* fetch */
2730 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2731 paddr_nz (mask
), flags
);
2736 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2739 mips_send_packet (buf
, 1);
2741 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2744 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2745 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2747 if (nfields
!= 4 || rcmd
!= cmd
)
2748 mips_error ("common_breakpoint: Bad response from remote board: %s",
2753 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2754 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2755 if (mips_monitor
== MON_DDB
)
2756 rresponse
= rerrflg
;
2757 if (rresponse
!= 22) /* invalid argument */
2758 fprintf_unfiltered (gdb_stderr
,
2759 "common_breakpoint (0x%s): Got error: 0x%x\n",
2760 paddr_nz (addr
), rresponse
);
2768 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2774 SERIAL_WRITE (mips_desc
, srec
, len
);
2776 ch
= mips_readchar (2);
2780 case SERIAL_TIMEOUT
:
2781 error ("Timeout during download.");
2785 case 0x15: /* NACK */
2786 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr
));
2789 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2794 /* Download a binary file by converting it to S records. */
2797 mips_load_srec (char *args
)
2801 char *buffer
, srec
[1024];
2803 unsigned int srec_frame
= 200;
2805 static int hashmark
= 1;
2807 buffer
= alloca (srec_frame
* 2 + 256);
2809 abfd
= bfd_openr (args
, 0);
2812 printf_filtered ("Unable to open file %s\n", args
);
2816 if (bfd_check_format (abfd
, bfd_object
) == 0)
2818 printf_filtered ("File is not an object file\n");
2822 /* This actually causes a download in the IDT binary format: */
2823 mips_send_command (LOAD_CMD
, 0);
2825 for (s
= abfd
->sections
; s
; s
= s
->next
)
2827 if (s
->flags
& SEC_LOAD
)
2829 unsigned int numbytes
;
2831 /* FIXME! vma too small????? */
2832 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2834 (long) (s
->vma
+ s
->_raw_size
));
2835 gdb_flush (gdb_stdout
);
2837 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2839 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2841 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2843 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2844 send_srec (srec
, reclen
, s
->vma
+ i
);
2848 putchar_unfiltered ('#');
2849 gdb_flush (gdb_stdout
);
2852 } /* Per-packet (or S-record) loop */
2854 putchar_unfiltered ('\n');
2855 } /* Loadable sections */
2858 putchar_unfiltered ('\n');
2860 /* Write a type 7 terminator record. no data for a type 7, and there
2861 is no data, so len is 0. */
2863 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2865 send_srec (srec
, reclen
, abfd
->start_address
);
2867 SERIAL_FLUSH_INPUT (mips_desc
);
2871 * mips_make_srec -- make an srecord. This writes each line, one at a
2872 * time, each with it's own header and trailer line.
2873 * An srecord looks like this:
2875 * byte count-+ address
2876 * start ---+ | | data +- checksum
2878 * S01000006F6B692D746573742E73726563E4
2879 * S315000448600000000000000000FC00005900000000E9
2880 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2881 * S30B0004485A0000000000004E
2884 * S<type><length><address><data><checksum>
2888 * is the number of bytes following upto the checksum. Note that
2889 * this is not the number of chars following, since it takes two
2890 * chars to represent a byte.
2894 * 1) two byte address data record
2895 * 2) three byte address data record
2896 * 3) four byte address data record
2897 * 7) four byte address termination record
2898 * 8) three byte address termination record
2899 * 9) two byte address termination record
2902 * is the start address of the data following, or in the case of
2903 * a termination record, the start address of the image
2907 * is the sum of all the raw byte data in the record, from the length
2908 * upwards, modulo 256 and subtracted from 255.
2910 * This routine returns the length of the S-record.
2915 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2918 unsigned char checksum
;
2921 /* Create the header for the srec. addr_size is the number of bytes in the address,
2922 and 1 is the number of bytes in the count. */
2924 /* FIXME!! bigger buf required for 64-bit! */
2927 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2928 /* This assumes S3 style downloads (4byte addresses). There should
2929 probably be a check, or the code changed to make it more
2931 buf
[3] = memaddr
>> 24;
2932 buf
[4] = memaddr
>> 16;
2933 buf
[5] = memaddr
>> 8;
2935 memcpy (&buf
[7], myaddr
, len
);
2937 /* Note that the checksum is calculated on the raw data, not the
2938 hexified data. It includes the length, address and the data
2939 portions of the packet. */
2941 buf
+= 2; /* Point at length byte */
2942 for (i
= 0; i
< len
+ 4 + 1; i
++)
2950 /* The following manifest controls whether we enable the simple flow
2951 control support provided by the monitor. If enabled the code will
2952 wait for an affirmative ACK between transmitting packets. */
2953 #define DOETXACK (1)
2955 /* The PMON fast-download uses an encoded packet format constructed of
2956 3byte data packets (encoded as 4 printable ASCII characters), and
2957 escape sequences (preceded by a '/'):
2960 'C' compare checksum (12bit value, not included in checksum calculation)
2961 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2962 'Z' zero fill multiple of 3bytes
2963 'B' byte (12bit encoded value, of 8bit data)
2964 'A' address (36bit encoded value)
2965 'E' define entry as original address, and exit load
2967 The packets are processed in 4 character chunks, so the escape
2968 sequences that do not have any data (or variable length data)
2969 should be padded to a 4 character boundary. The decoder will give
2970 an error if the complete message block size is not a multiple of
2971 4bytes (size of record).
2973 The encoding of numbers is done in 6bit fields. The 6bit value is
2974 used to index into this string to get the specific character
2975 encoding for the value: */
2976 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2978 /* Convert the number of bits required into an encoded number, 6bits
2979 at a time (range 0..63). Keep a checksum if required (passed
2980 pointer non-NULL). The function returns the number of encoded
2981 characters written into the buffer. */
2983 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2985 int count
= (n
/ 6);
2989 fprintf_unfiltered (gdb_stderr
,
2990 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
2995 fprintf_unfiltered (gdb_stderr
,
2996 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3000 /* Deal with the checksum: */
3006 *chksum
+= ((v
>> 24) & 0xFFF);
3008 *chksum
+= ((v
>> 12) & 0xFFF);
3010 *chksum
+= ((v
>> 0) & 0xFFF);
3017 *p
++ = encoding
[(v
>> n
) & 0x3F];
3024 /* Shorthand function (that could be in-lined) to output the zero-fill
3025 escape sequence into the data stream. */
3027 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
3031 sprintf (*buff
, "/Z");
3032 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3033 *buff
+= (count
+ 2);
3035 return (recsize
+ count
+ 2);
3039 pmon_checkset (int recsize
, char **buff
, int *value
)
3043 /* Add the checksum (without updating the value): */
3044 sprintf (*buff
, "/C");
3045 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3046 *buff
+= (count
+ 2);
3047 sprintf (*buff
, "\n");
3048 *buff
+= 2; /* include zero terminator */
3049 /* Forcing a checksum validation clears the sum: */
3051 return (recsize
+ count
+ 3);
3054 /* Amount of padding we leave after at the end of the output buffer,
3055 for the checksum and line termination characters: */
3056 #define CHECKSIZE (4 + 4 + 4 + 2)
3057 /* zero-fill, checksum, transfer end and line termination space. */
3059 /* The amount of binary data loaded from the object file in a single
3061 #define BINCHUNK (1024)
3063 /* Maximum line of data accepted by the monitor: */
3064 #define MAXRECSIZE (550)
3065 /* NOTE: This constant depends on the monitor being used. This value
3066 is for PMON 5.x on the Cogent Vr4300 board. */
3069 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3070 int inamount
, int *recsize
, unsigned int *csum
,
3071 unsigned int *zerofill
)
3076 /* This is a simple check to ensure that our data will fit within
3077 the maximum allowable record size. Each record output is 4bytes
3078 in length. We must allow space for a pending zero fill command,
3079 the record, and a checksum record. */
3080 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3082 /* Process the binary data: */
3083 if ((inamount
- *inptr
) < 3)
3086 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3088 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3090 *recsize
+= (2 + count
);
3095 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3096 /* Simple check for zero data. TODO: A better check would be
3097 to check the last, and then the middle byte for being zero
3098 (if the first byte is not). We could then check for
3099 following runs of zeros, and if above a certain size it is
3100 worth the 4 or 8 character hit of the byte insertions used
3101 to pad to the start of the zeroes. NOTE: This also depends
3102 on the alignment at the end of the zero run. */
3103 if (value
== 0x00000000)
3106 if (*zerofill
== 0xFFF) /* 12bit counter */
3107 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3112 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3113 count
= pmon_makeb64 (value
, p
, 24, csum
);
3126 pmon_check_ack (char *mesg
)
3128 #if defined(DOETXACK)
3133 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3134 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3136 fprintf_unfiltered (gdb_stderr
,
3137 "Failed to receive valid ACK for %s\n", mesg
);
3138 return (-1); /* terminate the download */
3141 #endif /* DOETXACK */
3145 /* pmon_download - Send a sequence of characters to the PMON download port,
3146 which is either a serial port or a UDP socket. */
3149 pmon_start_download (void)
3153 /* Create the temporary download file. */
3154 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3155 perror_with_name (tftp_localname
);
3159 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3160 mips_expect ("Downloading from ");
3161 mips_expect (udp_in_use
? "udp" : "tty0");
3162 mips_expect (", ^C to abort\r\n");
3167 mips_expect_download (char *string
)
3169 if (!mips_expect (string
))
3171 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3173 remove (tftp_localname
); /* Remove temporary file */
3181 pmon_end_download (int final
, int bintotal
)
3183 char hexnumber
[9]; /* includes '\0' space */
3187 static char *load_cmd_prefix
= "load -b -s ";
3191 /* Close off the temporary file containing the load data. */
3195 /* Make the temporary file readable by the world. */
3196 if (stat (tftp_localname
, &stbuf
) == 0)
3197 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3199 /* Must reinitialize the board to prevent PMON from crashing. */
3200 mips_send_command ("initEther\r", -1);
3202 /* Send the load command. */
3203 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3204 strcpy (cmd
, load_cmd_prefix
);
3205 strcat (cmd
, tftp_name
);
3207 mips_send_command (cmd
, 0);
3209 if (!mips_expect_download ("Downloading from "))
3211 if (!mips_expect_download (tftp_name
))
3213 if (!mips_expect_download (", ^C to abort\r\n"))
3217 /* Wait for the stuff that PMON prints after the load has completed.
3218 The timeout value for use in the tftp case (15 seconds) was picked
3219 arbitrarily but might be too small for really large downloads. FIXME. */
3220 if (mips_monitor
== MON_LSI
)
3222 pmon_check_ack ("termination");
3223 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3226 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3228 sprintf (hexnumber
, "%x", final
);
3229 mips_expect (hexnumber
);
3230 mips_expect ("\r\n");
3231 if (mips_monitor
!= MON_LSI
)
3232 pmon_check_ack ("termination");
3233 mips_expect ("\r\ntotal = 0x");
3234 sprintf (hexnumber
, "%x", bintotal
);
3235 mips_expect (hexnumber
);
3236 if (!mips_expect_download (" bytes\r\n"))
3240 remove (tftp_localname
); /* Remove temporary file */
3244 pmon_download (char *buffer
, int length
)
3247 fwrite (buffer
, 1, length
, tftp_file
);
3249 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3253 pmon_load_fast (char *file
)
3257 unsigned char *binbuf
;
3260 unsigned int csum
= 0;
3261 int hashmark
= !tftp_in_use
;
3266 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3267 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3269 abfd
= bfd_openr (file
, 0);
3272 printf_filtered ("Unable to open file %s\n", file
);
3276 if (bfd_check_format (abfd
, bfd_object
) == 0)
3278 printf_filtered ("File is not an object file\n");
3282 /* Setup the required download state: */
3283 mips_send_command ("set dlproto etxack\r", -1);
3284 mips_send_command ("set dlecho off\r", -1);
3285 /* NOTE: We get a "cannot set variable" message if the variable is
3286 already defined to have the argument we give. The code doesn't
3287 care, since it just scans to the next prompt anyway. */
3288 /* Start the download: */
3289 pmon_start_download ();
3291 /* Zero the checksum */
3292 sprintf (buffer
, "/Kxx\n");
3293 reclen
= strlen (buffer
);
3294 pmon_download (buffer
, reclen
);
3295 finished
= pmon_check_ack ("/Kxx");
3297 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3298 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3300 bintotal
+= s
->_raw_size
;
3301 final
= (s
->vma
+ s
->_raw_size
);
3303 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3304 (unsigned int) (s
->vma
+ s
->_raw_size
));
3305 gdb_flush (gdb_stdout
);
3307 /* Output the starting address */
3308 sprintf (buffer
, "/A");
3309 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3310 buffer
[2 + reclen
] = '\n';
3311 buffer
[3 + reclen
] = '\0';
3312 reclen
+= 3; /* for the initial escape code and carriage return */
3313 pmon_download (buffer
, reclen
);
3314 finished
= pmon_check_ack ("/A");
3318 unsigned int binamount
;
3319 unsigned int zerofill
= 0;
3325 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3329 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3331 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3333 /* This keeps a rolling checksum, until we decide to output
3335 for (; ((binamount
- binptr
) > 0);)
3337 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3338 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3340 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3341 pmon_download (buffer
, reclen
);
3342 finished
= pmon_check_ack ("data record");
3345 zerofill
= 0; /* do not transmit pending zerofills */
3351 putchar_unfiltered ('#');
3352 gdb_flush (gdb_stdout
);
3356 reclen
= 0; /* buffer processed */
3361 /* Ensure no out-standing zerofill requests: */
3363 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3365 /* and then flush the line: */
3368 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3369 /* Currently pmon_checkset outputs the line terminator by
3370 default, so we write out the buffer so far: */
3371 pmon_download (buffer
, reclen
);
3372 finished
= pmon_check_ack ("record remnant");
3376 putchar_unfiltered ('\n');
3379 /* Terminate the transfer. We know that we have an empty output
3380 buffer at this point. */
3381 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3382 reclen
= strlen (buffer
);
3383 pmon_download (buffer
, reclen
);
3386 { /* Ignore the termination message: */
3387 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3390 { /* Deal with termination message: */
3391 pmon_end_download (final
, bintotal
);
3397 /* mips_load -- download a file. */
3400 mips_load (char *file
, int from_tty
)
3402 /* Get the board out of remote debugging mode. */
3403 if (mips_exit_debug ())
3404 error ("mips_load: Couldn't get into monitor mode.");
3406 if (mips_monitor
!= MON_IDT
)
3407 pmon_load_fast (file
);
3409 mips_load_srec (file
);
3413 /* Finally, make the PC point at the start address */
3414 if (mips_monitor
!= MON_IDT
)
3416 /* Work around problem where PMON monitor updates the PC after a load
3417 to a different value than GDB thinks it has. The following ensures
3418 that the write_pc() WILL update the PC value: */
3419 register_valid
[PC_REGNUM
] = 0;
3422 write_pc (bfd_get_start_address (exec_bfd
));
3424 inferior_pid
= 0; /* No process now */
3426 /* This is necessary because many things were based on the PC at the time that
3427 we attached to the monitor, which is no longer valid now that we have loaded
3428 new code (and just changed the PC). Another way to do this might be to call
3429 normal_stop, except that the stack may not be valid, and things would get
3430 horribly confused... */
3432 clear_symtab_users ();
3436 /* Pass the command argument as a packet to PMON verbatim. */
3439 pmon_command (char *args
, int from_tty
)
3441 char buf
[DATA_MAXLEN
+ 1];
3444 sprintf (buf
, "0x0 %s", args
);
3445 mips_send_packet (buf
, 1);
3446 printf_filtered ("Send packet: %s\n", buf
);
3448 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3450 printf_filtered ("Received packet: %s\n", buf
);
3454 _initialize_remote_mips (void)
3456 /* Initialize the fields in mips_ops that are common to all four targets. */
3457 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3458 mips_ops
.to_close
= mips_close
;
3459 mips_ops
.to_detach
= mips_detach
;
3460 mips_ops
.to_resume
= mips_resume
;
3461 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3462 mips_ops
.to_store_registers
= mips_store_registers
;
3463 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3464 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3465 mips_ops
.to_files_info
= mips_files_info
;
3466 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3467 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3468 mips_ops
.to_kill
= mips_kill
;
3469 mips_ops
.to_load
= mips_load
;
3470 mips_ops
.to_create_inferior
= mips_create_inferior
;
3471 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3472 mips_ops
.to_stratum
= process_stratum
;
3473 mips_ops
.to_has_all_memory
= 1;
3474 mips_ops
.to_has_memory
= 1;
3475 mips_ops
.to_has_stack
= 1;
3476 mips_ops
.to_has_registers
= 1;
3477 mips_ops
.to_has_execution
= 1;
3478 mips_ops
.to_magic
= OPS_MAGIC
;
3480 /* Copy the common fields to all four target vectors. */
3481 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3483 /* Initialize target-specific fields in the target vectors. */
3484 mips_ops
.to_shortname
= "mips";
3485 mips_ops
.to_doc
= "\
3486 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3487 The argument is the device it is connected to or, if it contains a colon,\n\
3488 HOST:PORT to access a board over a network";
3489 mips_ops
.to_open
= mips_open
;
3490 mips_ops
.to_wait
= mips_wait
;
3492 pmon_ops
.to_shortname
= "pmon";
3493 pmon_ops
.to_doc
= "\
3494 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3495 line. The argument is the device it is connected to or, if it contains a\n\
3496 colon, HOST:PORT to access a board over a network";
3497 pmon_ops
.to_open
= pmon_open
;
3498 pmon_ops
.to_wait
= mips_wait
;
3500 ddb_ops
.to_shortname
= "ddb";
3502 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3503 line. The first argument is the device it is connected to or, if it contains\n\
3504 a colon, HOST:PORT to access a board over a network. The optional second\n\
3505 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3506 TFTP downloads to the board. The optional third parameter is the local name\n\
3507 of the TFTP temporary file, if it differs from the filename seen by the board.";
3508 ddb_ops
.to_open
= ddb_open
;
3509 ddb_ops
.to_wait
= mips_wait
;
3511 lsi_ops
.to_shortname
= "lsi";
3512 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3513 lsi_ops
.to_open
= lsi_open
;
3514 lsi_ops
.to_wait
= mips_wait
;
3516 /* Add the targets. */
3517 add_target (&mips_ops
);
3518 add_target (&pmon_ops
);
3519 add_target (&ddb_ops
);
3520 add_target (&lsi_ops
);
3523 add_set_cmd ("timeout", no_class
, var_zinteger
,
3524 (char *) &mips_receive_wait
,
3525 "Set timeout in seconds for remote MIPS serial I/O.",
3530 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3531 (char *) &mips_retransmit_wait
,
3532 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3533 This is the number of seconds to wait for an acknowledgement to a packet\n\
3534 before resending the packet.", &setlist
),
3538 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3539 (char *) &mips_syn_garbage
,
3540 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3541 This is the maximum number of characters GDB will ignore when trying to\n\
3542 synchronize with the remote system. A value of -1 means that there is no limit\n\
3543 (Note that these characters are printed out even though they are ignored.)",
3548 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3549 (char *) &mips_monitor_prompt
,
3550 "Set the prompt that GDB expects from the monitor.",
3555 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3556 (char *) &monitor_warnings
,
3557 "Set printing of monitor warnings.\n"
3558 "When enabled, monitor warnings about hardware breakpoints "
3559 "will be displayed.",
3563 add_com ("pmon <command>", class_obscure
, pmon_command
,
3564 "Send a packet to PMON (must be in debug mode).");
3566 add_show_from_set (add_set_cmd ("mask-address", no_class
,
3567 var_boolean
, &mask_address_p
,
3568 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3569 Use \"on\" to enable the masking and \"off\" to disable it.\n",