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 (const 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 (const char *string
, int timeout
)
545 const char *p
= string
;
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 (const 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
);
633 /* Read a character from the remote, aborting on error. Returns
634 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
635 returns). FIXME: If we see the string mips_monitor_prompt from
636 the board, then we are debugging on the main console port, and we
637 have somehow dropped out of remote debugging mode. In this case,
638 we automatically go back in to remote debugging mode. This is a
639 hack, put in because I can't find any way for a program running on
640 the remote board to terminate without also ending remote debugging
641 mode. I assume users won't have any trouble with this; for one
642 thing, the IDT documentation generally assumes that the remote
643 debugging port is not the console port. This is, however, very
644 convenient for DejaGnu when you only have one connected serial
648 mips_readchar (int timeout
)
651 static int state
= 0;
652 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
658 if (i
== -1 && watchdog
> 0)
662 if (state
== mips_monitor_prompt_len
)
664 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
666 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
668 target_mourn_inferior ();
669 error ("Watchdog has expired. Target detached.\n");
672 if (ch
== SERIAL_EOF
)
673 mips_error ("End of file from remote");
674 if (ch
== SERIAL_ERROR
)
675 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
676 if (remote_debug
> 1)
678 /* Don't use _filtered; we can't deal with a QUIT out of
679 target_wait, and I think this might be called from there. */
680 if (ch
!= SERIAL_TIMEOUT
)
681 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
683 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
686 /* If we have seen mips_monitor_prompt and we either time out, or
687 we see a @ (which was echoed from a packet we sent), reset the
688 board as described above. The first character in a packet after
689 the SYN (which is not echoed) is always an @ unless the packet is
690 more than 64 characters long, which ours never are. */
691 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
692 && state
== mips_monitor_prompt_len
693 && !mips_initializing
696 if (remote_debug
> 0)
697 /* Don't use _filtered; we can't deal with a QUIT out of
698 target_wait, and I think this might be called from there. */
699 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
706 /* At this point, about the only thing we can do is abort the command
707 in progress and get back to command level as quickly as possible. */
709 error ("Remote board reset, debug protocol re-initialized.");
712 if (ch
== mips_monitor_prompt
[state
])
720 /* Get a packet header, putting the data in the supplied buffer.
721 PGARBAGE is a pointer to the number of garbage characters received
722 so far. CH is the last character received. Returns 0 for success,
723 or -1 for timeout. */
726 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
732 /* Wait for a SYN. mips_syn_garbage is intended to prevent
733 sitting here indefinitely if the board sends us one garbage
734 character per second. ch may already have a value from the
735 last time through the loop. */
738 ch
= mips_readchar (timeout
);
739 if (ch
== SERIAL_TIMEOUT
)
743 /* Printing the character here lets the user of gdb see
744 what the program is outputting, if the debugging is
745 being done on the console port. Don't use _filtered:
746 we can't deal with a QUIT out of target_wait and
747 buffered target output confuses the user. */
748 if (!mips_initializing
|| remote_debug
> 0)
750 if (isprint (ch
) || isspace (ch
))
752 fputc_unfiltered (ch
, gdb_stdtarg
);
756 fputc_readable (ch
, gdb_stdtarg
);
758 gdb_flush (gdb_stdtarg
);
761 /* Only count unprintable characters. */
762 if (! (isprint (ch
) || isspace (ch
)))
765 if (mips_syn_garbage
> 0
766 && *pgarbage
> mips_syn_garbage
)
767 mips_error ("Debug protocol failure: more than %d characters before a sync.",
772 /* Get the packet header following the SYN. */
773 for (i
= 1; i
< HDR_LENGTH
; i
++)
775 ch
= mips_readchar (timeout
);
776 if (ch
== SERIAL_TIMEOUT
)
778 /* Make sure this is a header byte. */
779 if (ch
== SYN
|| !HDR_CHECK (ch
))
785 /* If we got the complete header, we can return. Otherwise we
786 loop around and keep looking for SYN. */
792 /* Get a packet header, putting the data in the supplied buffer.
793 PGARBAGE is a pointer to the number of garbage characters received
794 so far. The last character read is returned in *PCH. Returns 0
795 for success, -1 for timeout, -2 for error. */
798 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
, int *pch
, int timeout
)
803 for (i
= 0; i
< TRLR_LENGTH
; i
++)
805 ch
= mips_readchar (timeout
);
807 if (ch
== SERIAL_TIMEOUT
)
809 if (!TRLR_CHECK (ch
))
816 /* Get the checksum of a packet. HDR points to the packet header.
817 DATA points to the packet data. LEN is the length of DATA. */
820 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
822 register const unsigned char *p
;
828 /* The initial SYN is not included in the checksum. */
842 /* Send a packet containing the given ASCII string. */
845 mips_send_packet (const char *s
, int get_ack
)
847 /* unsigned */ int len
;
848 unsigned char *packet
;
853 if (len
> DATA_MAXLEN
)
854 mips_error ("MIPS protocol data packet too long: %s", s
);
856 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
858 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
859 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
860 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
861 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
863 memcpy (packet
+ HDR_LENGTH
, s
, len
);
865 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
866 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
867 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
868 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
870 /* Increment the sequence number. This will set mips_send_seq to
871 the sequence number we expect in the acknowledgement. */
872 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
874 /* We can only have one outstanding data packet, so we just wait for
875 the acknowledgement here. Keep retransmitting the packet until
876 we get one, or until we've tried too many times. */
877 for (try = 0; try < mips_send_retries
; try++)
882 if (remote_debug
> 0)
884 /* Don't use _filtered; we can't deal with a QUIT out of
885 target_wait, and I think this might be called from there. */
886 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
887 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
890 if (SERIAL_WRITE (mips_desc
, packet
,
891 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
892 mips_error ("write to target failed: %s", safe_strerror (errno
));
901 unsigned char hdr
[HDR_LENGTH
+ 1];
902 unsigned char trlr
[TRLR_LENGTH
+ 1];
906 /* Get the packet header. If we time out, resend the data
908 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
914 /* If we get a data packet, assume it is a duplicate and
915 ignore it. FIXME: If the acknowledgement is lost, this
916 data packet may be the packet the remote sends after the
918 if (HDR_IS_DATA (hdr
))
922 /* Ignore any errors raised whilst attempting to ignore
925 len
= HDR_GET_LEN (hdr
);
927 for (i
= 0; i
< len
; i
++)
931 rch
= mips_readchar (2);
937 if (rch
== SERIAL_TIMEOUT
)
939 /* ignore the character */
943 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
945 /* We don't bother checking the checksum, or providing an
946 ACK to the packet. */
950 /* If the length is not 0, this is a garbled packet. */
951 if (HDR_GET_LEN (hdr
) != 0)
954 /* Get the packet trailer. */
955 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
956 mips_retransmit_wait
);
958 /* If we timed out, resend the data packet. */
962 /* If we got a bad character, reread the header. */
966 /* If the checksum does not match the trailer checksum, this
967 is a bad packet; ignore it. */
968 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
969 != TRLR_GET_CKSUM (trlr
))
972 if (remote_debug
> 0)
974 hdr
[HDR_LENGTH
] = '\0';
975 trlr
[TRLR_LENGTH
] = '\0';
976 /* Don't use _filtered; we can't deal with a QUIT out of
977 target_wait, and I think this might be called from there. */
978 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
979 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
982 /* If this ack is for the current packet, we're done. */
983 seq
= HDR_GET_SEQ (hdr
);
984 if (seq
== mips_send_seq
)
987 /* If this ack is for the last packet, resend the current
989 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
992 /* Otherwise this is a bad ack; ignore it. Increment the
993 garbage count to ensure that we do not stay in this loop
999 mips_error ("Remote did not acknowledge packet");
1002 /* Receive and acknowledge a packet, returning the data in BUFF (which
1003 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1004 implies that only the sender retransmits packets, so this code just
1005 waits silently for a packet. It returns the length of the received
1006 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1007 don't print an error message and return -1. */
1010 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1015 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1022 unsigned char hdr
[HDR_LENGTH
];
1023 unsigned char trlr
[TRLR_LENGTH
];
1027 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1030 mips_error ("Timed out waiting for remote packet");
1037 /* An acknowledgement is probably a duplicate; ignore it. */
1038 if (!HDR_IS_DATA (hdr
))
1040 len
= HDR_GET_LEN (hdr
);
1041 /* Check if the length is valid for an ACK, we may aswell
1042 try and read the remainder of the packet: */
1045 /* Ignore the error condition, since we are going to
1046 ignore the packet anyway. */
1047 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1049 /* Don't use _filtered; we can't deal with a QUIT out of
1050 target_wait, and I think this might be called from there. */
1051 if (remote_debug
> 0)
1052 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1056 len
= HDR_GET_LEN (hdr
);
1057 for (i
= 0; i
< len
; i
++)
1061 rch
= mips_readchar (timeout
);
1067 if (rch
== SERIAL_TIMEOUT
)
1070 mips_error ("Timed out waiting for remote packet");
1079 /* Don't use _filtered; we can't deal with a QUIT out of
1080 target_wait, and I think this might be called from there. */
1081 if (remote_debug
> 0)
1082 fprintf_unfiltered (gdb_stdlog
,
1083 "Got new SYN after %d chars (wanted %d)\n",
1088 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1092 mips_error ("Timed out waiting for packet");
1098 /* Don't use _filtered; we can't deal with a QUIT out of
1099 target_wait, and I think this might be called from there. */
1100 if (remote_debug
> 0)
1101 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1105 /* If this is the wrong sequence number, ignore it. */
1106 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
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 "Ignoring sequence number %d (want %d)\n",
1113 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1117 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1120 if (remote_debug
> 0)
1121 /* Don't use _filtered; we can't deal with a QUIT out of
1122 target_wait, and I think this might be called from there. */
1123 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1124 mips_cksum (hdr
, buff
, len
),
1125 TRLR_GET_CKSUM (trlr
));
1127 /* The checksum failed. Send an acknowledgement for the
1128 previous packet to tell the remote to resend the packet. */
1129 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1130 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1131 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1132 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1134 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1136 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1137 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1138 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1140 if (remote_debug
> 0)
1142 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1143 /* Don't use _filtered; we can't deal with a QUIT out of
1144 target_wait, and I think this might be called from there. */
1145 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1149 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1152 mips_error ("write to target failed: %s", safe_strerror (errno
));
1158 if (remote_debug
> 0)
1161 /* Don't use _filtered; we can't deal with a QUIT out of
1162 target_wait, and I think this might be called from there. */
1163 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1166 /* We got the packet. Send an acknowledgement. */
1167 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1169 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1170 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1171 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1172 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1174 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1176 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1177 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1178 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1180 if (remote_debug
> 0)
1182 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1183 /* Don't use _filtered; we can't deal with a QUIT out of
1184 target_wait, and I think this might be called from there. */
1185 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1189 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1192 mips_error ("write to target failed: %s", safe_strerror (errno
));
1200 /* Optionally send a request to the remote system and optionally wait
1201 for the reply. This implements the remote debugging protocol,
1202 which is built on top of the packet protocol defined above. Each
1203 request has an ADDR argument and a DATA argument. The following
1204 requests are defined:
1206 \0 don't send a request; just wait for a reply
1207 i read word from instruction space at ADDR
1208 d read word from data space at ADDR
1209 I write DATA to instruction space at ADDR
1210 D write DATA to data space at ADDR
1211 r read register number ADDR
1212 R set register number ADDR to value DATA
1213 c continue execution (if ADDR != 1, set pc to ADDR)
1214 s single step (if ADDR != 1, set pc to ADDR)
1216 The read requests return the value requested. The write requests
1217 return the previous value in the changed location. The execution
1218 requests return a UNIX wait value (the approximate signal which
1219 caused execution to stop is in the upper eight bits).
1221 If PERR is not NULL, this function waits for a reply. If an error
1222 occurs, it sets *PERR to 1 and sets errno according to what the
1223 target board reports. */
1226 mips_request (int cmd
,
1233 char myBuff
[DATA_MAXLEN
+ 1];
1238 unsigned long rresponse
;
1240 if (buff
== (char *) NULL
)
1245 if (mips_need_reply
)
1246 internal_error ("mips_request: Trying to send command before reply");
1247 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1248 mips_send_packet (buff
, 1);
1249 mips_need_reply
= 1;
1252 if (perr
== (int *) NULL
)
1255 if (!mips_need_reply
)
1256 internal_error ("mips_request: Trying to get reply before command");
1258 mips_need_reply
= 0;
1260 len
= mips_receive_packet (buff
, 1, timeout
);
1263 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1264 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1265 || (cmd
!= '\0' && rcmd
!= cmd
))
1266 mips_error ("Bad response from remote board");
1272 /* FIXME: This will returns MIPS errno numbers, which may or may
1273 not be the same as errno values used on other systems. If
1274 they stick to common errno values, they will be the same, but
1275 if they don't, they must be translated. */
1286 mips_initialize_cleanups (PTR arg
)
1288 mips_initializing
= 0;
1292 mips_exit_cleanups (PTR arg
)
1298 mips_send_command (const char *cmd
, int prompt
)
1300 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1304 mips_expect (mips_monitor_prompt
);
1307 /* Enter remote (dbx) debug mode: */
1309 mips_enter_debug (void)
1311 /* Reset the sequence numbers, ready for the new debug sequence: */
1313 mips_receive_seq
= 0;
1315 if (mips_monitor
!= MON_IDT
)
1316 mips_send_command ("debug\r", 0);
1317 else /* assume IDT monitor by default */
1318 mips_send_command ("db tty0\r", 0);
1321 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1323 /* We don't need to absorb any spurious characters here, since the
1324 mips_receive_header will eat up a reasonable number of characters
1325 whilst looking for the SYN, however this avoids the "garbage"
1326 being displayed to the user. */
1327 if (mips_monitor
!= MON_IDT
)
1331 char buff
[DATA_MAXLEN
+ 1];
1332 if (mips_receive_packet (buff
, 1, 3) < 0)
1333 mips_error ("Failed to initialize (didn't receive packet).");
1337 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1339 mips_exit_debug (void)
1342 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1346 if (mips_monitor
!= MON_IDT
)
1348 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1349 so we do not get a reply to this command: */
1350 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1351 mips_need_reply
= 0;
1352 if (!mips_expect (" break!"))
1356 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1358 if (!mips_expect (mips_monitor_prompt
))
1361 do_cleanups (old_cleanups
);
1366 /* Initialize a new connection to the MIPS board, and make sure we are
1367 really connected. */
1370 mips_initialize (void)
1373 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1376 /* What is this code doing here? I don't see any way it can happen, and
1377 it might mean mips_initializing didn't get cleared properly.
1378 So I'll make it a warning. */
1380 if (mips_initializing
)
1382 warning ("internal error: mips_initialize called twice");
1387 mips_initializing
= 1;
1389 /* At this point, the packit protocol isn't responding. We'll try getting
1390 into the monitor, and restarting the protocol. */
1392 /* Force the system into the monitor. After this we *should* be at
1393 the mips_monitor_prompt. */
1394 if (mips_monitor
!= MON_IDT
)
1395 j
= 0; /* start by checking if we are already at the prompt */
1397 j
= 1; /* start by sending a break */
1402 case 0: /* First, try sending a CR */
1403 SERIAL_FLUSH_INPUT (mips_desc
);
1404 SERIAL_WRITE (mips_desc
, "\r", 1);
1406 case 1: /* First, try sending a break */
1407 SERIAL_SEND_BREAK (mips_desc
);
1409 case 2: /* Then, try a ^C */
1410 SERIAL_WRITE (mips_desc
, "\003", 1);
1412 case 3: /* Then, try escaping from download */
1414 if (mips_monitor
!= MON_IDT
)
1418 /* We shouldn't need to send multiple termination
1419 sequences, since the target performs line (or
1420 block) reads, and then processes those
1421 packets. In-case we were downloading a large packet
1422 we flush the output buffer before inserting a
1423 termination sequence. */
1424 SERIAL_FLUSH_OUTPUT (mips_desc
);
1425 sprintf (tbuff
, "\r/E/E\r");
1426 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1433 /* We are possibly in binary download mode, having
1434 aborted in the middle of an S-record. ^C won't
1435 work because of binary mode. The only reliable way
1436 out is to send enough termination packets (8 bytes)
1437 to fill up and then overflow the largest size
1438 S-record (255 bytes in this case). This amounts to
1442 mips_make_srec (srec
, '7', 0, NULL
, 0);
1444 for (i
= 1; i
<= 33; i
++)
1446 SERIAL_WRITE (mips_desc
, srec
, 8);
1448 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1449 break; /* Break immediatly if we get something from
1456 mips_error ("Failed to initialize.");
1459 if (mips_expect (mips_monitor_prompt
))
1463 if (mips_monitor
!= MON_IDT
)
1465 /* Sometimes PMON ignores the first few characters in the first
1466 command sent after a load. Sending a blank command gets
1468 mips_send_command ("\r", -1);
1470 /* Ensure the correct target state: */
1471 if (mips_monitor
!= MON_LSI
)
1472 mips_send_command ("set regsize 64\r", -1);
1473 mips_send_command ("set hostport tty0\r", -1);
1474 mips_send_command ("set brkcmd \"\"\r", -1);
1475 /* Delete all the current breakpoints: */
1476 mips_send_command ("db *\r", -1);
1477 /* NOTE: PMON does not have breakpoint support through the
1478 "debug" mode, only at the monitor command-line. */
1481 mips_enter_debug ();
1483 /* Clear all breakpoints: */
1484 if ((mips_monitor
== MON_IDT
1485 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1486 || mips_monitor
== MON_LSI
)
1487 monitor_supports_breakpoints
= 1;
1489 monitor_supports_breakpoints
= 0;
1491 do_cleanups (old_cleanups
);
1493 /* If this doesn't call error, we have connected; we don't care if
1494 the request itself succeeds or fails. */
1496 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1497 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1498 select_frame (get_current_frame (), 0);
1501 /* Open a connection to the remote board. */
1503 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1504 enum mips_monitor_type new_monitor
,
1505 const char *new_monitor_prompt
)
1508 char *serial_port_name
;
1509 char *remote_name
= 0;
1510 char *local_name
= 0;
1515 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1516 device is attached to the target board (e.g., /dev/ttya).\n"
1517 "If you want to use TFTP to download to the board, specify the name of a\n"
1518 "temporary file to be used by GDB for downloads as the second argument.\n"
1519 "This filename must be in the form host:filename, where host is the name\n"
1520 "of the host running the TFTP server, and the file must be readable by the\n"
1521 "world. If the local name of the temporary file differs from the name as\n"
1522 "seen from the board via TFTP, specify that name as the third parameter.\n");
1524 /* Parse the serial port name, the optional TFTP name, and the
1525 optional local TFTP name. */
1526 if ((argv
= buildargv (name
)) == NULL
)
1528 make_cleanup_freeargv (argv
);
1530 serial_port_name
= strsave (argv
[0]);
1531 if (argv
[1]) /* remote TFTP name specified? */
1533 remote_name
= argv
[1];
1534 if (argv
[2]) /* local TFTP filename specified? */
1535 local_name
= argv
[2];
1538 target_preopen (from_tty
);
1541 unpush_target (current_ops
);
1543 /* Open and initialize the serial port. */
1544 mips_desc
= SERIAL_OPEN (serial_port_name
);
1545 if (mips_desc
== (serial_t
) NULL
)
1546 perror_with_name (serial_port_name
);
1548 if (baud_rate
!= -1)
1550 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1552 SERIAL_CLOSE (mips_desc
);
1553 perror_with_name (serial_port_name
);
1557 SERIAL_RAW (mips_desc
);
1559 /* Open and initialize the optional download port. If it is in the form
1560 hostname#portnumber, it's a UDP socket. If it is in the form
1561 hostname:filename, assume it's the TFTP filename that must be
1562 passed to the DDB board to tell it where to get the load file. */
1565 if (strchr (remote_name
, '#'))
1567 udp_desc
= SERIAL_OPEN (remote_name
);
1569 perror_with_name ("Unable to open UDP port");
1574 /* Save the remote and local names of the TFTP temp file. If
1575 the user didn't specify a local name, assume it's the same
1576 as the part of the remote name after the "host:". */
1580 free (tftp_localname
);
1581 if (local_name
== NULL
)
1582 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1583 local_name
++; /* skip over the colon */
1584 if (local_name
== NULL
)
1585 local_name
= remote_name
; /* local name same as remote name */
1586 tftp_name
= strsave (remote_name
);
1587 tftp_localname
= strsave (local_name
);
1595 /* Reset the expected monitor prompt if it's never been set before. */
1596 if (mips_monitor_prompt
== NULL
)
1597 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1598 mips_monitor
= new_monitor
;
1603 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1605 /* Switch to using remote target now. */
1608 /* FIXME: Should we call start_remote here? */
1610 /* Try to figure out the processor model if possible. */
1611 ptype
= mips_read_processor_type ();
1613 mips_set_processor_type_command (strsave (ptype
), 0);
1615 /* This is really the job of start_remote however, that makes an assumption
1616 that the target is about to print out a status message of some sort. That
1617 doesn't happen here (in fact, it may not be possible to get the monitor to
1618 send the appropriate packet). */
1620 flush_cached_frames ();
1621 registers_changed ();
1622 stop_pc
= read_pc ();
1623 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1624 select_frame (get_current_frame (), 0);
1625 print_stack_frame (selected_frame
, -1, 1);
1626 free (serial_port_name
);
1630 mips_open (char *name
, int from_tty
)
1632 const char *monitor_prompt
= NULL
;
1633 if (TARGET_ARCHITECTURE
!= NULL
1634 && TARGET_ARCHITECTURE
->arch
== bfd_arch_mips
)
1636 switch (TARGET_ARCHITECTURE
->mach
)
1638 case bfd_mach_mips4100
:
1639 case bfd_mach_mips4300
:
1640 case bfd_mach_mips4600
:
1641 case bfd_mach_mips4650
:
1642 case bfd_mach_mips5000
:
1643 monitor_prompt
= "<RISQ> ";
1647 if (monitor_prompt
== NULL
)
1648 monitor_prompt
= "<IDT>";
1649 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1653 pmon_open (char *name
, int from_tty
)
1655 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1659 ddb_open (char *name
, int from_tty
)
1661 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1665 lsi_open (char *name
, int from_tty
)
1669 /* Clear the LSI breakpoint table. */
1670 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1671 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1673 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1676 /* Close a connection to the remote board. */
1679 mips_close (int quitting
)
1683 /* Get the board out of remote debugging mode. */
1684 (void) mips_exit_debug ();
1690 /* Detach from the remote board. */
1693 mips_detach (char *args
, int from_tty
)
1696 error ("Argument given to \"detach\" when remotely debugging.");
1703 printf_unfiltered ("Ending remote MIPS debugging.\n");
1706 /* Tell the target board to resume. This does not wait for a reply
1707 from the board, except in the case of single-stepping on LSI boards,
1708 where PMON does return a reply. */
1711 mips_resume (int pid
, int step
, enum target_signal siggnal
)
1715 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1716 a single step, so we wait for that. */
1717 mips_request (step
? 's' : 'c', 1, siggnal
,
1718 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1719 mips_receive_wait
, NULL
);
1722 /* Return the signal corresponding to SIG, where SIG is the number which
1723 the MIPS protocol uses for the signal. */
1725 mips_signal_from_protocol (int sig
)
1727 /* We allow a few more signals than the IDT board actually returns, on
1728 the theory that there is at least *some* hope that perhaps the numbering
1729 for these signals is widely agreed upon. */
1732 return TARGET_SIGNAL_UNKNOWN
;
1734 /* Don't want to use target_signal_from_host because we are converting
1735 from MIPS signal numbers, not host ones. Our internal numbers
1736 match the MIPS numbers for the signals the board can return, which
1737 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1738 return (enum target_signal
) sig
;
1741 /* Wait until the remote stops, and return a wait status. */
1744 mips_wait (int pid
, struct target_waitstatus
*status
)
1748 char buff
[DATA_MAXLEN
];
1754 interrupt_count
= 0;
1757 /* If we have not sent a single step or continue command, then the
1758 board is waiting for us to do something. Return a status
1759 indicating that it is stopped. */
1760 if (!mips_need_reply
)
1762 status
->kind
= TARGET_WAITKIND_STOPPED
;
1763 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1767 /* No timeout; we sit here as long as the program continues to execute. */
1769 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1772 mips_error ("Remote failure: %s", safe_strerror (errno
));
1774 /* On returning from a continue, the PMON monitor seems to start
1775 echoing back the messages we send prior to sending back the
1776 ACK. The code can cope with this, but to try and avoid the
1777 unnecessary serial traffic, and "spurious" characters displayed
1778 to the user, we cheat and reset the debug protocol. The problems
1779 seems to be caused by a check on the number of arguments, and the
1780 command length, within the monitor causing it to echo the command
1782 if (mips_monitor
== MON_PMON
)
1785 mips_enter_debug ();
1788 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1790 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1791 &rpc
, &rfp
, &rsp
, flags
);
1794 char buf
[MAX_REGISTER_RAW_SIZE
];
1796 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1797 supply_register (PC_REGNUM
, buf
);
1799 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1800 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1802 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1803 supply_register (SP_REGNUM
, buf
);
1805 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1806 supply_register (FP_REGNUM
, buf
);
1812 for (i
= 0; i
<= 2; i
++)
1813 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1815 else if (flags
[i
] == '\000')
1820 if (strcmp (target_shortname
, "lsi") == 0)
1823 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1824 Right now, PMON doesn't give us enough information to determine which
1825 breakpoint we hit. So we have to look up the PC in our own table
1826 of breakpoints, and if found, assume it's just a normal instruction
1827 fetch breakpoint, not a data watchpoint. FIXME when PMON
1828 provides some way to tell us what type of breakpoint it is. */
1830 CORE_ADDR pc
= read_pc ();
1833 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1835 if (lsi_breakpoints
[i
].addr
== pc
1836 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1843 /* If a data breakpoint was hit, PMON returns the following packet:
1845 The return packet from an ordinary breakpoint doesn't have the
1846 extra 0x01 field tacked onto the end. */
1847 if (nfields
== 1 && rpc
== 1)
1852 /* NOTE: The following (sig) numbers are defined by PMON:
1853 SPP_SIGTRAP 5 breakpoint
1861 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1862 and so on, because the constants we want here are determined by the
1863 MIPS protocol and have nothing to do with what host we are running on. */
1864 if ((rstatus
& 0xff) == 0)
1866 status
->kind
= TARGET_WAITKIND_EXITED
;
1867 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1869 else if ((rstatus
& 0xff) == 0x7f)
1871 status
->kind
= TARGET_WAITKIND_STOPPED
;
1872 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1874 /* If the stop PC is in the _exit function, assume
1875 we hit the 'break 0x3ff' instruction in _exit, so this
1876 is not a normal breakpoint. */
1877 if (strcmp (target_shortname
, "lsi") == 0)
1880 CORE_ADDR func_start
;
1881 CORE_ADDR pc
= read_pc ();
1883 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1884 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1885 && func_start
== pc
)
1886 status
->kind
= TARGET_WAITKIND_EXITED
;
1891 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1892 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1898 /* We have to map between the register numbers used by gdb and the
1899 register numbers used by the debugging protocol. This function
1900 assumes that we are using tm-mips.h. */
1902 #define REGNO_OFFSET 96
1905 mips_map_regno (int regno
)
1909 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1910 return regno
- FP0_REGNUM
+ 32;
1914 return REGNO_OFFSET
+ 0;
1916 return REGNO_OFFSET
+ 1;
1918 return REGNO_OFFSET
+ 2;
1920 return REGNO_OFFSET
+ 3;
1922 return REGNO_OFFSET
+ 4;
1924 return REGNO_OFFSET
+ 5;
1926 /* FIXME: Is there a way to get the status register? */
1931 /* Fetch the remote registers. */
1934 mips_fetch_registers (int regno
)
1936 unsigned LONGEST val
;
1941 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1942 mips_fetch_registers (regno
);
1946 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1947 /* FP_REGNUM on the mips is a hack which is just supposed to read
1948 zero (see also mips-nat.c). */
1952 /* If PMON doesn't support this register, don't waste serial
1953 bandwidth trying to read it. */
1954 int pmon_reg
= mips_map_regno (regno
);
1955 if (regno
!= 0 && pmon_reg
== 0)
1959 /* Unfortunately the PMON version in the Vr4300 board has been
1960 compiled without the 64bit register access commands. This
1961 means we cannot get hold of the full register width. */
1962 if (mips_monitor
== MON_DDB
)
1963 val
= (unsigned) mips_request ('t', pmon_reg
, 0,
1964 &err
, mips_receive_wait
, NULL
);
1966 val
= mips_request ('r', pmon_reg
, 0,
1967 &err
, mips_receive_wait
, NULL
);
1969 mips_error ("Can't read register %d: %s", regno
,
1970 safe_strerror (errno
));
1975 char buf
[MAX_REGISTER_RAW_SIZE
];
1977 /* We got the number the register holds, but gdb expects to see a
1978 value in the target byte ordering. */
1979 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
1980 supply_register (regno
, buf
);
1984 /* Prepare to store registers. The MIPS protocol can store individual
1985 registers, so this function doesn't have to do anything. */
1988 mips_prepare_to_store (void)
1992 /* Store remote register(s). */
1995 mips_store_registers (int regno
)
2001 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2002 mips_store_registers (regno
);
2006 mips_request ('R', mips_map_regno (regno
),
2007 read_register (regno
),
2008 &err
, mips_receive_wait
, NULL
);
2010 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2013 /* Fetch a word from the target board. */
2016 mips_fetch_word (CORE_ADDR addr
)
2021 val
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2024 /* Data space failed; try instruction space. */
2025 val
= mips_request ('i', addr
, 0, &err
,
2026 mips_receive_wait
, NULL
);
2028 mips_error ("Can't read address 0x%s: %s",
2029 paddr_nz (addr
), safe_strerror (errno
));
2034 /* Store a word to the target board. Returns errno code or zero for
2035 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2036 memory location there. */
2038 /* FIXME! make sure only 32-bit quantities get stored! */
2040 mips_store_word (CORE_ADDR addr
, unsigned int val
, char *old_contents
)
2043 unsigned int oldcontents
;
2045 oldcontents
= mips_request ('D', addr
, val
, &err
,
2046 mips_receive_wait
, NULL
);
2049 /* Data space failed; try instruction space. */
2050 oldcontents
= mips_request ('I', addr
, val
, &err
,
2051 mips_receive_wait
, NULL
);
2055 if (old_contents
!= NULL
)
2056 store_unsigned_integer (old_contents
, 4, oldcontents
);
2060 /* Read or write LEN bytes from inferior memory at MEMADDR,
2061 transferring to or from debugger address MYADDR. Write to inferior
2062 if SHOULD_WRITE is nonzero. Returns length of data written or
2063 read; 0 for error. Note that protocol gives us the correct value
2064 for a longword, since it transfers values in ASCII. We want the
2065 byte values, so we have to swap the longword values. */
2067 static int mask_address_p
= 1;
2070 mips_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
2071 struct target_ops
*ignore
)
2079 /* PMON targets do not cope well with 64 bit addresses. Mask the
2080 value down to 32 bits. */
2082 memaddr
&= (CORE_ADDR
) 0xffffffff;
2084 /* Round starting address down to longword boundary. */
2085 addr
= memaddr
& ~3;
2086 /* Round ending address up; get number of longwords that makes. */
2087 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2088 /* Allocate buffer of that many longwords. */
2089 buffer
= alloca (count
* 4);
2093 /* Fill start and end extra bytes of buffer with existing data. */
2094 if (addr
!= memaddr
|| len
< 4)
2096 /* Need part of initial word -- fetch it. */
2097 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2102 /* Need part of last word -- fetch it. FIXME: we do this even
2103 if we don't need it. */
2104 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2105 mips_fetch_word (addr
+ (count
- 1) * 4));
2108 /* Copy data to be written over corresponding part of buffer */
2110 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2112 /* Write the entire buffer. */
2114 for (i
= 0; i
< count
; i
++, addr
+= 4)
2116 status
= mips_store_word (addr
,
2117 extract_unsigned_integer (&buffer
[i
* 4], 4),
2119 /* Report each kilobyte (we download 32-bit words at a time) */
2122 printf_unfiltered ("*");
2123 gdb_flush (gdb_stdout
);
2130 /* FIXME: Do we want a QUIT here? */
2133 printf_unfiltered ("\n");
2137 /* Read all the longwords */
2138 for (i
= 0; i
< count
; i
++, addr
+= 4)
2140 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2144 /* Copy appropriate bytes out of the buffer. */
2145 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2150 /* Print info on this target. */
2153 mips_files_info (struct target_ops
*ignore
)
2155 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2158 /* Kill the process running on the board. This will actually only
2159 work if we are doing remote debugging over the console input. I
2160 think that if IDT/sim had the remote debug interrupt enabled on the
2161 right port, we could interrupt the process with a break signal. */
2166 if (!mips_wait_flag
)
2171 if (interrupt_count
>= 2)
2173 interrupt_count
= 0;
2175 target_terminal_ours ();
2177 if (query ("Interrupted while waiting for the program.\n\
2178 Give up (and stop debugging it)? "))
2180 /* Clean up in such a way that mips_close won't try to talk to the
2181 board (it almost surely won't work since we weren't able to talk to
2186 printf_unfiltered ("Ending remote MIPS debugging.\n");
2187 target_mourn_inferior ();
2189 return_to_top_level (RETURN_QUIT
);
2192 target_terminal_inferior ();
2195 if (remote_debug
> 0)
2196 printf_unfiltered ("Sending break\n");
2198 SERIAL_SEND_BREAK (mips_desc
);
2207 SERIAL_WRITE (mips_desc
, &cc
, 1);
2209 target_mourn_inferior ();
2214 /* Start running on the target board. */
2217 mips_create_inferior (char *execfile
, char *args
, char **env
)
2224 Can't pass arguments to remote MIPS board; arguments ignored.");
2225 /* And don't try to use them on the next "run" command. */
2226 execute_command ("set args", 0);
2229 if (execfile
== 0 || exec_bfd
== 0)
2230 error ("No executable file specified");
2232 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2234 init_wait_for_inferior ();
2236 /* FIXME: Should we set inferior_pid here? */
2238 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2241 /* Clean up after a process. Actually nothing to do. */
2244 mips_mourn_inferior (void)
2246 if (current_ops
!= NULL
)
2247 unpush_target (current_ops
);
2248 generic_mourn_inferior ();
2251 /* We can write a breakpoint and read the shadow contents in one
2254 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2255 support, we read the contents of the target location and stash it,
2256 then overwrite it with a breakpoint instruction. ADDR is the target
2257 location in the target machine. CONTENTS_CACHE is a pointer to
2258 memory allocated for saving the target contents. It is guaranteed
2259 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2260 is accomplished via BREAKPOINT_MAX). */
2263 mips_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2265 if (monitor_supports_breakpoints
)
2266 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2268 return memory_insert_breakpoint (addr
, contents_cache
);
2272 mips_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2274 if (monitor_supports_breakpoints
)
2275 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2277 return memory_remove_breakpoint (addr
, contents_cache
);
2280 #if 0 /* currently not used */
2281 /* PMON does not currently provide support for the debug mode 'b'
2282 commands to manipulate breakpoints. However, if we wanted to use
2283 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2284 then this code performs the work needed to leave debug mode,
2285 set/clear the breakpoint, and then return to debug mode. */
2287 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2288 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2289 /* NOTE: The code relies on this vector being zero-initialised by the system */
2292 pmon_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2296 if (monitor_supports_breakpoints
)
2298 char tbuff
[12]; /* space for breakpoint command */
2302 /* PMON does not support debug level breakpoint set/remove: */
2303 if (mips_exit_debug ())
2304 mips_error ("Failed to exit debug mode");
2306 sprintf (tbuff
, "b %08x\r", addr
);
2307 mips_send_command (tbuff
, 0);
2309 mips_expect ("Bpt ");
2311 if (!mips_getstring (tbuff
, 2))
2313 tbuff
[2] = '\0'; /* terminate the string */
2314 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2316 fprintf_unfiltered (gdb_stderr
,
2317 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2321 mips_expect (" = ");
2323 /* Lead in the hex number we are expecting: */
2327 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2328 which targets return 64-bit addresses? PMON returns only 32! */
2329 if (!mips_getstring (&tbuff
[2], 8))
2331 tbuff
[10] = '\0'; /* terminate the string */
2333 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2335 fprintf_unfiltered (gdb_stderr
,
2336 "Invalid hex address from target: %s\n", tbuff
);
2340 if (bpnum
>= PMON_MAX_BP
)
2342 fprintf_unfiltered (gdb_stderr
,
2343 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2344 bpnum
, PMON_MAX_BP
- 1);
2349 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2351 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2353 mips_expect ("\r\n");
2354 mips_expect (mips_monitor_prompt
);
2356 mips_enter_debug ();
2361 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2365 pmon_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2367 if (monitor_supports_breakpoints
)
2370 char tbuff
[7]; /* enough for delete breakpoint command */
2372 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2373 if (mips_pmon_bp_info
[bpnum
] == addr
)
2376 if (bpnum
>= PMON_MAX_BP
)
2378 fprintf_unfiltered (gdb_stderr
,
2379 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2384 if (mips_exit_debug ())
2385 mips_error ("Failed to exit debug mode");
2387 sprintf (tbuff
, "db %02d\r", bpnum
);
2389 mips_send_command (tbuff
, -1);
2390 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2391 set" message will be returned. */
2393 mips_enter_debug ();
2398 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2403 /* Tell whether this target can support a hardware breakpoint. CNT
2404 is the number of hardware breakpoints already installed. This
2405 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2408 remote_mips_can_use_hardware_watchpoint (int cnt
)
2410 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2414 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2415 This is used for memory ref breakpoints. */
2417 static unsigned long
2418 calculate_mask (CORE_ADDR addr
, int len
)
2423 mask
= addr
^ (addr
+ len
- 1);
2425 for (i
= 32; i
>= 0; i
--)
2431 mask
= (unsigned long) 0xffffffff >> i
;
2437 /* Insert a hardware breakpoint. This works only on LSI targets, which
2438 implement ordinary breakpoints using hardware facilities. */
2441 remote_mips_insert_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2443 if (strcmp (target_shortname
, "lsi") == 0)
2444 return mips_insert_breakpoint (addr
, contents_cache
);
2450 /* Remove a hardware breakpoint. This works only on LSI targets, which
2451 implement ordinary breakpoints using hardware facilities. */
2454 remote_mips_remove_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2456 if (strcmp (target_shortname
, "lsi") == 0)
2457 return mips_remove_breakpoint (addr
, contents_cache
);
2462 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2463 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2467 remote_mips_set_watchpoint (CORE_ADDR addr
, int len
, int type
)
2469 if (set_breakpoint (addr
, len
, type
))
2476 remote_mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
2478 if (clear_breakpoint (addr
, len
, type
))
2485 remote_mips_stopped_by_watchpoint (void)
2487 return hit_watchpoint
;
2491 /* Insert a breakpoint. */
2494 set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2496 return common_breakpoint (1, addr
, len
, type
);
2500 /* Clear a breakpoint. */
2503 clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2505 return common_breakpoint (0, addr
, len
, type
);
2509 /* Check the error code from the return packet for an LSI breakpoint
2510 command. If there's no error, just return 0. If it's a warning,
2511 print the warning text and return 0. If it's an error, print
2512 the error text and return 1. <ADDR> is the address of the breakpoint
2513 that was being set. <RERRFLG> is the error code returned by PMON.
2514 This is a helper function for common_breakpoint. */
2517 check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2519 struct lsi_error
*err
;
2520 char *saddr
= paddr_nz (addr
); /* printable address string */
2522 if (rerrflg
== 0) /* no error */
2525 /* Warnings can be ORed together, so check them all. */
2526 if (rerrflg
& W_WARN
)
2528 if (monitor_warnings
)
2531 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2533 if ((err
->code
& rerrflg
) == err
->code
)
2536 fprintf_unfiltered (gdb_stderr
,
2537 "common_breakpoint (0x%s): Warning: %s\n",
2543 fprintf_unfiltered (gdb_stderr
,
2544 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2551 /* Errors are unique, i.e. can't be ORed together. */
2552 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2554 if ((err
->code
& rerrflg
) == err
->code
)
2556 fprintf_unfiltered (gdb_stderr
,
2557 "common_breakpoint (0x%s): Error: %s\n",
2563 fprintf_unfiltered (gdb_stderr
,
2564 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2571 /* This routine sends a breakpoint command to the remote target.
2573 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2574 <ADDR> is the address of the breakpoint.
2575 <LEN> the length of the region to break on.
2576 <TYPE> is the type of breakpoint:
2577 0 = write (BREAK_WRITE)
2578 1 = read (BREAK_READ)
2579 2 = read/write (BREAK_ACCESS)
2580 3 = instruction fetch (BREAK_FETCH)
2582 Return 0 if successful; otherwise 1. */
2585 common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2587 char buf
[DATA_MAXLEN
+ 1];
2589 int rpid
, rerrflg
, rresponse
, rlen
;
2592 addr
= ADDR_BITS_REMOVE (addr
);
2594 if (mips_monitor
== MON_LSI
)
2596 if (set
== 0) /* clear breakpoint */
2598 /* The LSI PMON "clear breakpoint" has this form:
2599 <pid> 'b' <bptn> 0x0
2601 <pid> 'b' 0x0 <code>
2603 <bptn> is a breakpoint number returned by an earlier 'B' command.
2604 Possible return codes: OK, E_BPT. */
2608 /* Search for the breakpoint in the table. */
2609 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2610 if (lsi_breakpoints
[i
].type
== type
2611 && lsi_breakpoints
[i
].addr
== addr
2612 && lsi_breakpoints
[i
].len
== len
)
2615 /* Clear the table entry and tell PMON to clear the breakpoint. */
2616 if (i
== MAX_LSI_BREAKPOINTS
)
2618 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2623 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2624 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2625 mips_send_packet (buf
, 1);
2627 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2630 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2632 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2634 return (check_lsi_error (addr
, rerrflg
));
2637 /* set a breakpoint */
2639 /* The LSI PMON "set breakpoint" command has this form:
2640 <pid> 'B' <addr> 0x0
2642 <pid> 'B' <bptn> <code>
2644 The "set data breakpoint" command has this form:
2646 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2648 where: type= "0x1" = read
2650 "0x3" = access (read or write)
2652 The reply returns two values:
2653 bptn - a breakpoint number, which is a small integer with
2654 possible values of zero through 255.
2655 code - an error return code, a value of zero indicates a
2656 succesful completion, other values indicate various
2657 errors and warnings.
2659 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2663 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2666 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2672 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2673 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2674 paddr_nz (addr
+ len
- 1));
2676 mips_send_packet (buf
, 1);
2678 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2681 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2682 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2683 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2684 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2687 if (check_lsi_error (addr
, rerrflg
))
2690 /* rresponse contains PMON's breakpoint number. Record the
2691 information for this breakpoint so we can clear it later. */
2692 lsi_breakpoints
[rresponse
].type
= type
;
2693 lsi_breakpoints
[rresponse
].addr
= addr
;
2694 lsi_breakpoints
[rresponse
].len
= len
;
2701 /* On non-LSI targets, the breakpoint command has this form:
2702 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2703 <MASK> is a don't care mask for addresses.
2704 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2708 mask
= calculate_mask (addr
, len
);
2711 if (set
) /* set a breakpoint */
2716 case BREAK_WRITE
: /* write */
2719 case BREAK_READ
: /* read */
2722 case BREAK_ACCESS
: /* read/write */
2725 case BREAK_FETCH
: /* fetch */
2733 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2734 paddr_nz (mask
), flags
);
2739 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2742 mips_send_packet (buf
, 1);
2744 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2747 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2748 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2750 if (nfields
!= 4 || rcmd
!= cmd
)
2751 mips_error ("common_breakpoint: Bad response from remote board: %s",
2756 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2757 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2758 if (mips_monitor
== MON_DDB
)
2759 rresponse
= rerrflg
;
2760 if (rresponse
!= 22) /* invalid argument */
2761 fprintf_unfiltered (gdb_stderr
,
2762 "common_breakpoint (0x%s): Got error: 0x%x\n",
2763 paddr_nz (addr
), rresponse
);
2771 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2777 SERIAL_WRITE (mips_desc
, srec
, len
);
2779 ch
= mips_readchar (2);
2783 case SERIAL_TIMEOUT
:
2784 error ("Timeout during download.");
2788 case 0x15: /* NACK */
2789 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr
));
2792 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2797 /* Download a binary file by converting it to S records. */
2800 mips_load_srec (char *args
)
2804 char *buffer
, srec
[1024];
2806 unsigned int srec_frame
= 200;
2808 static int hashmark
= 1;
2810 buffer
= alloca (srec_frame
* 2 + 256);
2812 abfd
= bfd_openr (args
, 0);
2815 printf_filtered ("Unable to open file %s\n", args
);
2819 if (bfd_check_format (abfd
, bfd_object
) == 0)
2821 printf_filtered ("File is not an object file\n");
2825 /* This actually causes a download in the IDT binary format: */
2826 mips_send_command (LOAD_CMD
, 0);
2828 for (s
= abfd
->sections
; s
; s
= s
->next
)
2830 if (s
->flags
& SEC_LOAD
)
2832 unsigned int numbytes
;
2834 /* FIXME! vma too small????? */
2835 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2837 (long) (s
->vma
+ s
->_raw_size
));
2838 gdb_flush (gdb_stdout
);
2840 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2842 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2844 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2846 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2847 send_srec (srec
, reclen
, s
->vma
+ i
);
2851 putchar_unfiltered ('#');
2852 gdb_flush (gdb_stdout
);
2855 } /* Per-packet (or S-record) loop */
2857 putchar_unfiltered ('\n');
2858 } /* Loadable sections */
2861 putchar_unfiltered ('\n');
2863 /* Write a type 7 terminator record. no data for a type 7, and there
2864 is no data, so len is 0. */
2866 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2868 send_srec (srec
, reclen
, abfd
->start_address
);
2870 SERIAL_FLUSH_INPUT (mips_desc
);
2874 * mips_make_srec -- make an srecord. This writes each line, one at a
2875 * time, each with it's own header and trailer line.
2876 * An srecord looks like this:
2878 * byte count-+ address
2879 * start ---+ | | data +- checksum
2881 * S01000006F6B692D746573742E73726563E4
2882 * S315000448600000000000000000FC00005900000000E9
2883 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2884 * S30B0004485A0000000000004E
2887 * S<type><length><address><data><checksum>
2891 * is the number of bytes following upto the checksum. Note that
2892 * this is not the number of chars following, since it takes two
2893 * chars to represent a byte.
2897 * 1) two byte address data record
2898 * 2) three byte address data record
2899 * 3) four byte address data record
2900 * 7) four byte address termination record
2901 * 8) three byte address termination record
2902 * 9) two byte address termination record
2905 * is the start address of the data following, or in the case of
2906 * a termination record, the start address of the image
2910 * is the sum of all the raw byte data in the record, from the length
2911 * upwards, modulo 256 and subtracted from 255.
2913 * This routine returns the length of the S-record.
2918 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2921 unsigned char checksum
;
2924 /* Create the header for the srec. addr_size is the number of bytes in the address,
2925 and 1 is the number of bytes in the count. */
2927 /* FIXME!! bigger buf required for 64-bit! */
2930 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2931 /* This assumes S3 style downloads (4byte addresses). There should
2932 probably be a check, or the code changed to make it more
2934 buf
[3] = memaddr
>> 24;
2935 buf
[4] = memaddr
>> 16;
2936 buf
[5] = memaddr
>> 8;
2938 memcpy (&buf
[7], myaddr
, len
);
2940 /* Note that the checksum is calculated on the raw data, not the
2941 hexified data. It includes the length, address and the data
2942 portions of the packet. */
2944 buf
+= 2; /* Point at length byte */
2945 for (i
= 0; i
< len
+ 4 + 1; i
++)
2953 /* The following manifest controls whether we enable the simple flow
2954 control support provided by the monitor. If enabled the code will
2955 wait for an affirmative ACK between transmitting packets. */
2956 #define DOETXACK (1)
2958 /* The PMON fast-download uses an encoded packet format constructed of
2959 3byte data packets (encoded as 4 printable ASCII characters), and
2960 escape sequences (preceded by a '/'):
2963 'C' compare checksum (12bit value, not included in checksum calculation)
2964 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2965 'Z' zero fill multiple of 3bytes
2966 'B' byte (12bit encoded value, of 8bit data)
2967 'A' address (36bit encoded value)
2968 'E' define entry as original address, and exit load
2970 The packets are processed in 4 character chunks, so the escape
2971 sequences that do not have any data (or variable length data)
2972 should be padded to a 4 character boundary. The decoder will give
2973 an error if the complete message block size is not a multiple of
2974 4bytes (size of record).
2976 The encoding of numbers is done in 6bit fields. The 6bit value is
2977 used to index into this string to get the specific character
2978 encoding for the value: */
2979 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2981 /* Convert the number of bits required into an encoded number, 6bits
2982 at a time (range 0..63). Keep a checksum if required (passed
2983 pointer non-NULL). The function returns the number of encoded
2984 characters written into the buffer. */
2986 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2988 int count
= (n
/ 6);
2992 fprintf_unfiltered (gdb_stderr
,
2993 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
2998 fprintf_unfiltered (gdb_stderr
,
2999 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3003 /* Deal with the checksum: */
3009 *chksum
+= ((v
>> 24) & 0xFFF);
3011 *chksum
+= ((v
>> 12) & 0xFFF);
3013 *chksum
+= ((v
>> 0) & 0xFFF);
3020 *p
++ = encoding
[(v
>> n
) & 0x3F];
3027 /* Shorthand function (that could be in-lined) to output the zero-fill
3028 escape sequence into the data stream. */
3030 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
3034 sprintf (*buff
, "/Z");
3035 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3036 *buff
+= (count
+ 2);
3038 return (recsize
+ count
+ 2);
3042 pmon_checkset (int recsize
, char **buff
, int *value
)
3046 /* Add the checksum (without updating the value): */
3047 sprintf (*buff
, "/C");
3048 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3049 *buff
+= (count
+ 2);
3050 sprintf (*buff
, "\n");
3051 *buff
+= 2; /* include zero terminator */
3052 /* Forcing a checksum validation clears the sum: */
3054 return (recsize
+ count
+ 3);
3057 /* Amount of padding we leave after at the end of the output buffer,
3058 for the checksum and line termination characters: */
3059 #define CHECKSIZE (4 + 4 + 4 + 2)
3060 /* zero-fill, checksum, transfer end and line termination space. */
3062 /* The amount of binary data loaded from the object file in a single
3064 #define BINCHUNK (1024)
3066 /* Maximum line of data accepted by the monitor: */
3067 #define MAXRECSIZE (550)
3068 /* NOTE: This constant depends on the monitor being used. This value
3069 is for PMON 5.x on the Cogent Vr4300 board. */
3072 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3073 int inamount
, int *recsize
, unsigned int *csum
,
3074 unsigned int *zerofill
)
3079 /* This is a simple check to ensure that our data will fit within
3080 the maximum allowable record size. Each record output is 4bytes
3081 in length. We must allow space for a pending zero fill command,
3082 the record, and a checksum record. */
3083 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3085 /* Process the binary data: */
3086 if ((inamount
- *inptr
) < 3)
3089 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3091 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3093 *recsize
+= (2 + count
);
3098 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3099 /* Simple check for zero data. TODO: A better check would be
3100 to check the last, and then the middle byte for being zero
3101 (if the first byte is not). We could then check for
3102 following runs of zeros, and if above a certain size it is
3103 worth the 4 or 8 character hit of the byte insertions used
3104 to pad to the start of the zeroes. NOTE: This also depends
3105 on the alignment at the end of the zero run. */
3106 if (value
== 0x00000000)
3109 if (*zerofill
== 0xFFF) /* 12bit counter */
3110 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3115 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3116 count
= pmon_makeb64 (value
, p
, 24, csum
);
3129 pmon_check_ack (char *mesg
)
3131 #if defined(DOETXACK)
3136 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3137 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3139 fprintf_unfiltered (gdb_stderr
,
3140 "Failed to receive valid ACK for %s\n", mesg
);
3141 return (-1); /* terminate the download */
3144 #endif /* DOETXACK */
3148 /* pmon_download - Send a sequence of characters to the PMON download port,
3149 which is either a serial port or a UDP socket. */
3152 pmon_start_download (void)
3156 /* Create the temporary download file. */
3157 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3158 perror_with_name (tftp_localname
);
3162 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3163 mips_expect ("Downloading from ");
3164 mips_expect (udp_in_use
? "udp" : "tty0");
3165 mips_expect (", ^C to abort\r\n");
3170 mips_expect_download (char *string
)
3172 if (!mips_expect (string
))
3174 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3176 remove (tftp_localname
); /* Remove temporary file */
3184 pmon_end_download (int final
, int bintotal
)
3186 char hexnumber
[9]; /* includes '\0' space */
3190 static char *load_cmd_prefix
= "load -b -s ";
3194 /* Close off the temporary file containing the load data. */
3198 /* Make the temporary file readable by the world. */
3199 if (stat (tftp_localname
, &stbuf
) == 0)
3200 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3202 /* Must reinitialize the board to prevent PMON from crashing. */
3203 mips_send_command ("initEther\r", -1);
3205 /* Send the load command. */
3206 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3207 strcpy (cmd
, load_cmd_prefix
);
3208 strcat (cmd
, tftp_name
);
3210 mips_send_command (cmd
, 0);
3212 if (!mips_expect_download ("Downloading from "))
3214 if (!mips_expect_download (tftp_name
))
3216 if (!mips_expect_download (", ^C to abort\r\n"))
3220 /* Wait for the stuff that PMON prints after the load has completed.
3221 The timeout value for use in the tftp case (15 seconds) was picked
3222 arbitrarily but might be too small for really large downloads. FIXME. */
3223 if (mips_monitor
== MON_LSI
)
3225 pmon_check_ack ("termination");
3226 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3229 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3231 sprintf (hexnumber
, "%x", final
);
3232 mips_expect (hexnumber
);
3233 mips_expect ("\r\n");
3234 if (mips_monitor
!= MON_LSI
)
3235 pmon_check_ack ("termination");
3236 mips_expect ("\r\ntotal = 0x");
3237 sprintf (hexnumber
, "%x", bintotal
);
3238 mips_expect (hexnumber
);
3239 if (!mips_expect_download (" bytes\r\n"))
3243 remove (tftp_localname
); /* Remove temporary file */
3247 pmon_download (char *buffer
, int length
)
3250 fwrite (buffer
, 1, length
, tftp_file
);
3252 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3256 pmon_load_fast (char *file
)
3260 unsigned char *binbuf
;
3263 unsigned int csum
= 0;
3264 int hashmark
= !tftp_in_use
;
3269 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3270 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3272 abfd
= bfd_openr (file
, 0);
3275 printf_filtered ("Unable to open file %s\n", file
);
3279 if (bfd_check_format (abfd
, bfd_object
) == 0)
3281 printf_filtered ("File is not an object file\n");
3285 /* Setup the required download state: */
3286 mips_send_command ("set dlproto etxack\r", -1);
3287 mips_send_command ("set dlecho off\r", -1);
3288 /* NOTE: We get a "cannot set variable" message if the variable is
3289 already defined to have the argument we give. The code doesn't
3290 care, since it just scans to the next prompt anyway. */
3291 /* Start the download: */
3292 pmon_start_download ();
3294 /* Zero the checksum */
3295 sprintf (buffer
, "/Kxx\n");
3296 reclen
= strlen (buffer
);
3297 pmon_download (buffer
, reclen
);
3298 finished
= pmon_check_ack ("/Kxx");
3300 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3301 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3303 bintotal
+= s
->_raw_size
;
3304 final
= (s
->vma
+ s
->_raw_size
);
3306 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3307 (unsigned int) (s
->vma
+ s
->_raw_size
));
3308 gdb_flush (gdb_stdout
);
3310 /* Output the starting address */
3311 sprintf (buffer
, "/A");
3312 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3313 buffer
[2 + reclen
] = '\n';
3314 buffer
[3 + reclen
] = '\0';
3315 reclen
+= 3; /* for the initial escape code and carriage return */
3316 pmon_download (buffer
, reclen
);
3317 finished
= pmon_check_ack ("/A");
3321 unsigned int binamount
;
3322 unsigned int zerofill
= 0;
3328 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3332 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3334 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3336 /* This keeps a rolling checksum, until we decide to output
3338 for (; ((binamount
- binptr
) > 0);)
3340 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3341 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3343 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3344 pmon_download (buffer
, reclen
);
3345 finished
= pmon_check_ack ("data record");
3348 zerofill
= 0; /* do not transmit pending zerofills */
3354 putchar_unfiltered ('#');
3355 gdb_flush (gdb_stdout
);
3359 reclen
= 0; /* buffer processed */
3364 /* Ensure no out-standing zerofill requests: */
3366 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3368 /* and then flush the line: */
3371 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3372 /* Currently pmon_checkset outputs the line terminator by
3373 default, so we write out the buffer so far: */
3374 pmon_download (buffer
, reclen
);
3375 finished
= pmon_check_ack ("record remnant");
3379 putchar_unfiltered ('\n');
3382 /* Terminate the transfer. We know that we have an empty output
3383 buffer at this point. */
3384 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3385 reclen
= strlen (buffer
);
3386 pmon_download (buffer
, reclen
);
3389 { /* Ignore the termination message: */
3390 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3393 { /* Deal with termination message: */
3394 pmon_end_download (final
, bintotal
);
3400 /* mips_load -- download a file. */
3403 mips_load (char *file
, int from_tty
)
3405 /* Get the board out of remote debugging mode. */
3406 if (mips_exit_debug ())
3407 error ("mips_load: Couldn't get into monitor mode.");
3409 if (mips_monitor
!= MON_IDT
)
3410 pmon_load_fast (file
);
3412 mips_load_srec (file
);
3416 /* Finally, make the PC point at the start address */
3417 if (mips_monitor
!= MON_IDT
)
3419 /* Work around problem where PMON monitor updates the PC after a load
3420 to a different value than GDB thinks it has. The following ensures
3421 that the write_pc() WILL update the PC value: */
3422 register_valid
[PC_REGNUM
] = 0;
3425 write_pc (bfd_get_start_address (exec_bfd
));
3427 inferior_pid
= 0; /* No process now */
3429 /* This is necessary because many things were based on the PC at the time that
3430 we attached to the monitor, which is no longer valid now that we have loaded
3431 new code (and just changed the PC). Another way to do this might be to call
3432 normal_stop, except that the stack may not be valid, and things would get
3433 horribly confused... */
3435 clear_symtab_users ();
3439 /* Pass the command argument as a packet to PMON verbatim. */
3442 pmon_command (char *args
, int from_tty
)
3444 char buf
[DATA_MAXLEN
+ 1];
3447 sprintf (buf
, "0x0 %s", args
);
3448 mips_send_packet (buf
, 1);
3449 printf_filtered ("Send packet: %s\n", buf
);
3451 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3453 printf_filtered ("Received packet: %s\n", buf
);
3457 _initialize_remote_mips (void)
3459 /* Initialize the fields in mips_ops that are common to all four targets. */
3460 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3461 mips_ops
.to_close
= mips_close
;
3462 mips_ops
.to_detach
= mips_detach
;
3463 mips_ops
.to_resume
= mips_resume
;
3464 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3465 mips_ops
.to_store_registers
= mips_store_registers
;
3466 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3467 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3468 mips_ops
.to_files_info
= mips_files_info
;
3469 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3470 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3471 mips_ops
.to_kill
= mips_kill
;
3472 mips_ops
.to_load
= mips_load
;
3473 mips_ops
.to_create_inferior
= mips_create_inferior
;
3474 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3475 mips_ops
.to_stratum
= process_stratum
;
3476 mips_ops
.to_has_all_memory
= 1;
3477 mips_ops
.to_has_memory
= 1;
3478 mips_ops
.to_has_stack
= 1;
3479 mips_ops
.to_has_registers
= 1;
3480 mips_ops
.to_has_execution
= 1;
3481 mips_ops
.to_magic
= OPS_MAGIC
;
3483 /* Copy the common fields to all four target vectors. */
3484 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3486 /* Initialize target-specific fields in the target vectors. */
3487 mips_ops
.to_shortname
= "mips";
3488 mips_ops
.to_doc
= "\
3489 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3490 The argument is the device it is connected to or, if it contains a colon,\n\
3491 HOST:PORT to access a board over a network";
3492 mips_ops
.to_open
= mips_open
;
3493 mips_ops
.to_wait
= mips_wait
;
3495 pmon_ops
.to_shortname
= "pmon";
3496 pmon_ops
.to_doc
= "\
3497 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3498 line. The argument is the device it is connected to or, if it contains a\n\
3499 colon, HOST:PORT to access a board over a network";
3500 pmon_ops
.to_open
= pmon_open
;
3501 pmon_ops
.to_wait
= mips_wait
;
3503 ddb_ops
.to_shortname
= "ddb";
3505 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3506 line. The first argument is the device it is connected to or, if it contains\n\
3507 a colon, HOST:PORT to access a board over a network. The optional second\n\
3508 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3509 TFTP downloads to the board. The optional third parameter is the local name\n\
3510 of the TFTP temporary file, if it differs from the filename seen by the board.";
3511 ddb_ops
.to_open
= ddb_open
;
3512 ddb_ops
.to_wait
= mips_wait
;
3514 lsi_ops
.to_shortname
= "lsi";
3515 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3516 lsi_ops
.to_open
= lsi_open
;
3517 lsi_ops
.to_wait
= mips_wait
;
3519 /* Add the targets. */
3520 add_target (&mips_ops
);
3521 add_target (&pmon_ops
);
3522 add_target (&ddb_ops
);
3523 add_target (&lsi_ops
);
3526 add_set_cmd ("timeout", no_class
, var_zinteger
,
3527 (char *) &mips_receive_wait
,
3528 "Set timeout in seconds for remote MIPS serial I/O.",
3533 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3534 (char *) &mips_retransmit_wait
,
3535 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3536 This is the number of seconds to wait for an acknowledgement to a packet\n\
3537 before resending the packet.", &setlist
),
3541 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3542 (char *) &mips_syn_garbage
,
3543 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3544 This is the maximum number of characters GDB will ignore when trying to\n\
3545 synchronize with the remote system. A value of -1 means that there is no limit\n\
3546 (Note that these characters are printed out even though they are ignored.)",
3551 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3552 (char *) &mips_monitor_prompt
,
3553 "Set the prompt that GDB expects from the monitor.",
3558 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3559 (char *) &monitor_warnings
,
3560 "Set printing of monitor warnings.\n"
3561 "When enabled, monitor warnings about hardware breakpoints "
3562 "will be displayed.",
3566 add_com ("pmon <command>", class_obscure
, pmon_command
,
3567 "Send a packet to PMON (must be in debug mode).");
3569 add_show_from_set (add_set_cmd ("mask-address", no_class
,
3570 var_boolean
, &mask_address_p
,
3571 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3572 Use \"on\" to enable the masking and \"off\" to disable it.\n",