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 (ch
, file
)
512 struct ui_file
*file
;
515 fputc_unfiltered ('\n', file
);
517 fprintf_unfiltered (file
, "\\r");
518 else if (ch
< 0x20) /* ASCII control character */
519 fprintf_unfiltered (file
, "^%c", ch
+ '@');
520 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
521 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
523 fputc_unfiltered (ch
, file
);
527 /* puts_readable - print a string, displaying non-printable chars in
528 ^x notation or in hex. */
531 fputs_readable (string
, file
)
533 struct ui_file
*file
;
537 while ((c
= *string
++) != '\0')
538 fputc_readable (c
, file
);
542 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
543 timed out. TIMEOUT specifies timeout value in seconds.
547 mips_expect_timeout (string
, timeout
)
555 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
556 fputs_readable (string
, gdb_stdlog
);
557 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
565 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
566 were waiting for the mips_monitor_prompt... */
568 c
= SERIAL_READCHAR (mips_desc
, timeout
);
570 if (c
== SERIAL_TIMEOUT
)
573 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
578 fputc_readable (c
, gdb_stdlog
);
586 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
599 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
600 timed out. The timeout value is hard-coded to 2 seconds. Use
601 mips_expect_timeout if a different timeout value is needed.
608 return mips_expect_timeout (string
, 2);
611 /* Read the required number of characters into the given buffer (which
612 is assumed to be large enough). The only failure is a timeout. */
614 mips_getstring (string
, n
)
624 c
= SERIAL_READCHAR (mips_desc
, 2);
626 if (c
== SERIAL_TIMEOUT
)
628 fprintf_unfiltered (gdb_stderr
,
629 "Failed to read %d characters from target (TIMEOUT)\n", n
);
640 /* Read a character from the remote, aborting on error. Returns
641 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
642 returns). FIXME: If we see the string mips_monitor_prompt from
643 the board, then we are debugging on the main console port, and we
644 have somehow dropped out of remote debugging mode. In this case,
645 we automatically go back in to remote debugging mode. This is a
646 hack, put in because I can't find any way for a program running on
647 the remote board to terminate without also ending remote debugging
648 mode. I assume users won't have any trouble with this; for one
649 thing, the IDT documentation generally assumes that the remote
650 debugging port is not the console port. This is, however, very
651 convenient for DejaGnu when you only have one connected serial
655 mips_readchar (timeout
)
659 static int state
= 0;
660 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
666 if (i
== -1 && watchdog
> 0)
670 if (state
== mips_monitor_prompt_len
)
672 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
674 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
676 target_mourn_inferior ();
677 error ("Watchdog has expired. Target detached.\n");
680 if (ch
== SERIAL_EOF
)
681 mips_error ("End of file from remote");
682 if (ch
== SERIAL_ERROR
)
683 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
684 if (remote_debug
> 1)
686 /* Don't use _filtered; we can't deal with a QUIT out of
687 target_wait, and I think this might be called from there. */
688 if (ch
!= SERIAL_TIMEOUT
)
689 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
691 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
694 /* If we have seen mips_monitor_prompt and we either time out, or
695 we see a @ (which was echoed from a packet we sent), reset the
696 board as described above. The first character in a packet after
697 the SYN (which is not echoed) is always an @ unless the packet is
698 more than 64 characters long, which ours never are. */
699 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
700 && state
== mips_monitor_prompt_len
701 && !mips_initializing
704 if (remote_debug
> 0)
705 /* Don't use _filtered; we can't deal with a QUIT out of
706 target_wait, and I think this might be called from there. */
707 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
714 /* At this point, about the only thing we can do is abort the command
715 in progress and get back to command level as quickly as possible. */
717 error ("Remote board reset, debug protocol re-initialized.");
720 if (ch
== mips_monitor_prompt
[state
])
728 /* Get a packet header, putting the data in the supplied buffer.
729 PGARBAGE is a pointer to the number of garbage characters received
730 so far. CH is the last character received. Returns 0 for success,
731 or -1 for timeout. */
734 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
744 /* Wait for a SYN. mips_syn_garbage is intended to prevent
745 sitting here indefinitely if the board sends us one garbage
746 character per second. ch may already have a value from the
747 last time through the loop. */
750 ch
= mips_readchar (timeout
);
751 if (ch
== SERIAL_TIMEOUT
)
755 /* Printing the character here lets the user of gdb see
756 what the program is outputting, if the debugging is
757 being done on the console port. Don't use _filtered:
758 we can't deal with a QUIT out of target_wait and
759 buffered target output confuses the user. */
760 if (!mips_initializing
|| remote_debug
> 0)
762 if (isprint (ch
) || isspace (ch
))
764 fputc_unfiltered (ch
, gdb_stdtarg
);
768 fputc_readable (ch
, gdb_stdtarg
);
770 gdb_flush (gdb_stdtarg
);
773 /* Only count unprintable characters. */
774 if (! (isprint (ch
) || isspace (ch
)))
777 if (mips_syn_garbage
> 0
778 && *pgarbage
> mips_syn_garbage
)
779 mips_error ("Debug protocol failure: more than %d characters before a sync.",
784 /* Get the packet header following the SYN. */
785 for (i
= 1; i
< HDR_LENGTH
; i
++)
787 ch
= mips_readchar (timeout
);
788 if (ch
== SERIAL_TIMEOUT
)
790 /* Make sure this is a header byte. */
791 if (ch
== SYN
|| !HDR_CHECK (ch
))
797 /* If we got the complete header, we can return. Otherwise we
798 loop around and keep looking for SYN. */
804 /* Get a packet header, putting the data in the supplied buffer.
805 PGARBAGE is a pointer to the number of garbage characters received
806 so far. The last character read is returned in *PCH. Returns 0
807 for success, -1 for timeout, -2 for error. */
810 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
819 for (i
= 0; i
< TRLR_LENGTH
; i
++)
821 ch
= mips_readchar (timeout
);
823 if (ch
== SERIAL_TIMEOUT
)
825 if (!TRLR_CHECK (ch
))
832 /* Get the checksum of a packet. HDR points to the packet header.
833 DATA points to the packet data. LEN is the length of DATA. */
836 mips_cksum (hdr
, data
, len
)
837 const unsigned char *hdr
;
838 const unsigned char *data
;
841 register const unsigned char *p
;
847 /* The initial SYN is not included in the checksum. */
861 /* Send a packet containing the given ASCII string. */
864 mips_send_packet (s
, get_ack
)
868 /* unsigned */ int len
;
869 unsigned char *packet
;
874 if (len
> DATA_MAXLEN
)
875 mips_error ("MIPS protocol data packet too long: %s", s
);
877 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
879 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
880 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
881 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
882 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
884 memcpy (packet
+ HDR_LENGTH
, s
, len
);
886 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
887 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
888 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
889 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
891 /* Increment the sequence number. This will set mips_send_seq to
892 the sequence number we expect in the acknowledgement. */
893 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
895 /* We can only have one outstanding data packet, so we just wait for
896 the acknowledgement here. Keep retransmitting the packet until
897 we get one, or until we've tried too many times. */
898 for (try = 0; try < mips_send_retries
; try++)
903 if (remote_debug
> 0)
905 /* Don't use _filtered; we can't deal with a QUIT out of
906 target_wait, and I think this might be called from there. */
907 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
908 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
911 if (SERIAL_WRITE (mips_desc
, packet
,
912 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
913 mips_error ("write to target failed: %s", safe_strerror (errno
));
922 unsigned char hdr
[HDR_LENGTH
+ 1];
923 unsigned char trlr
[TRLR_LENGTH
+ 1];
927 /* Get the packet header. If we time out, resend the data
929 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
935 /* If we get a data packet, assume it is a duplicate and
936 ignore it. FIXME: If the acknowledgement is lost, this
937 data packet may be the packet the remote sends after the
939 if (HDR_IS_DATA (hdr
))
943 /* Ignore any errors raised whilst attempting to ignore
946 len
= HDR_GET_LEN (hdr
);
948 for (i
= 0; i
< len
; i
++)
952 rch
= mips_readchar (2);
958 if (rch
== SERIAL_TIMEOUT
)
960 /* ignore the character */
964 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
966 /* We don't bother checking the checksum, or providing an
967 ACK to the packet. */
971 /* If the length is not 0, this is a garbled packet. */
972 if (HDR_GET_LEN (hdr
) != 0)
975 /* Get the packet trailer. */
976 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
977 mips_retransmit_wait
);
979 /* If we timed out, resend the data packet. */
983 /* If we got a bad character, reread the header. */
987 /* If the checksum does not match the trailer checksum, this
988 is a bad packet; ignore it. */
989 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
990 != TRLR_GET_CKSUM (trlr
))
993 if (remote_debug
> 0)
995 hdr
[HDR_LENGTH
] = '\0';
996 trlr
[TRLR_LENGTH
] = '\0';
997 /* Don't use _filtered; we can't deal with a QUIT out of
998 target_wait, and I think this might be called from there. */
999 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
1000 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
1003 /* If this ack is for the current packet, we're done. */
1004 seq
= HDR_GET_SEQ (hdr
);
1005 if (seq
== mips_send_seq
)
1008 /* If this ack is for the last packet, resend the current
1010 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1013 /* Otherwise this is a bad ack; ignore it. Increment the
1014 garbage count to ensure that we do not stay in this loop
1020 mips_error ("Remote did not acknowledge packet");
1023 /* Receive and acknowledge a packet, returning the data in BUFF (which
1024 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1025 implies that only the sender retransmits packets, so this code just
1026 waits silently for a packet. It returns the length of the received
1027 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1028 don't print an error message and return -1. */
1031 mips_receive_packet (buff
, throw_error
, timeout
)
1039 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1046 unsigned char hdr
[HDR_LENGTH
];
1047 unsigned char trlr
[TRLR_LENGTH
];
1051 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1054 mips_error ("Timed out waiting for remote packet");
1061 /* An acknowledgement is probably a duplicate; ignore it. */
1062 if (!HDR_IS_DATA (hdr
))
1064 len
= HDR_GET_LEN (hdr
);
1065 /* Check if the length is valid for an ACK, we may aswell
1066 try and read the remainder of the packet: */
1069 /* Ignore the error condition, since we are going to
1070 ignore the packet anyway. */
1071 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1073 /* Don't use _filtered; we can't deal with a QUIT out of
1074 target_wait, and I think this might be called from there. */
1075 if (remote_debug
> 0)
1076 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1080 len
= HDR_GET_LEN (hdr
);
1081 for (i
= 0; i
< len
; i
++)
1085 rch
= mips_readchar (timeout
);
1091 if (rch
== SERIAL_TIMEOUT
)
1094 mips_error ("Timed out waiting for remote packet");
1103 /* Don't use _filtered; we can't deal with a QUIT out of
1104 target_wait, and I think this might be called from there. */
1105 if (remote_debug
> 0)
1106 fprintf_unfiltered (gdb_stdlog
,
1107 "Got new SYN after %d chars (wanted %d)\n",
1112 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1116 mips_error ("Timed out waiting for packet");
1122 /* Don't use _filtered; we can't deal with a QUIT out of
1123 target_wait, and I think this might be called from there. */
1124 if (remote_debug
> 0)
1125 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1129 /* If this is the wrong sequence number, ignore it. */
1130 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1132 /* Don't use _filtered; we can't deal with a QUIT out of
1133 target_wait, and I think this might be called from there. */
1134 if (remote_debug
> 0)
1135 fprintf_unfiltered (gdb_stdlog
,
1136 "Ignoring sequence number %d (want %d)\n",
1137 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1141 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1144 if (remote_debug
> 0)
1145 /* Don't use _filtered; we can't deal with a QUIT out of
1146 target_wait, and I think this might be called from there. */
1147 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1148 mips_cksum (hdr
, buff
, len
),
1149 TRLR_GET_CKSUM (trlr
));
1151 /* The checksum failed. Send an acknowledgement for the
1152 previous packet to tell the remote to resend the packet. */
1153 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1154 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1155 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1156 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1158 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1160 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1161 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1162 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1164 if (remote_debug
> 0)
1166 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1167 /* Don't use _filtered; we can't deal with a QUIT out of
1168 target_wait, and I think this might be called from there. */
1169 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1173 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1176 mips_error ("write to target failed: %s", safe_strerror (errno
));
1182 if (remote_debug
> 0)
1185 /* Don't use _filtered; we can't deal with a QUIT out of
1186 target_wait, and I think this might be called from there. */
1187 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1190 /* We got the packet. Send an acknowledgement. */
1191 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1193 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1194 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1195 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1196 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1198 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1200 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1201 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1202 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1204 if (remote_debug
> 0)
1206 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1207 /* Don't use _filtered; we can't deal with a QUIT out of
1208 target_wait, and I think this might be called from there. */
1209 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1213 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1216 mips_error ("write to target failed: %s", safe_strerror (errno
));
1224 /* Optionally send a request to the remote system and optionally wait
1225 for the reply. This implements the remote debugging protocol,
1226 which is built on top of the packet protocol defined above. Each
1227 request has an ADDR argument and a DATA argument. The following
1228 requests are defined:
1230 \0 don't send a request; just wait for a reply
1231 i read word from instruction space at ADDR
1232 d read word from data space at ADDR
1233 I write DATA to instruction space at ADDR
1234 D write DATA to data space at ADDR
1235 r read register number ADDR
1236 R set register number ADDR to value DATA
1237 c continue execution (if ADDR != 1, set pc to ADDR)
1238 s single step (if ADDR != 1, set pc to ADDR)
1240 The read requests return the value requested. The write requests
1241 return the previous value in the changed location. The execution
1242 requests return a UNIX wait value (the approximate signal which
1243 caused execution to stop is in the upper eight bits).
1245 If PERR is not NULL, this function waits for a reply. If an error
1246 occurs, it sets *PERR to 1 and sets errno according to what the
1247 target board reports. */
1250 mips_request (int cmd
,
1257 char myBuff
[DATA_MAXLEN
+ 1];
1262 unsigned long rresponse
;
1264 if (buff
== (char *) NULL
)
1269 if (mips_need_reply
)
1270 internal_error ("mips_request: Trying to send command before reply");
1271 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1272 mips_send_packet (buff
, 1);
1273 mips_need_reply
= 1;
1276 if (perr
== (int *) NULL
)
1279 if (!mips_need_reply
)
1280 internal_error ("mips_request: Trying to get reply before command");
1282 mips_need_reply
= 0;
1284 len
= mips_receive_packet (buff
, 1, timeout
);
1287 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1288 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1289 || (cmd
!= '\0' && rcmd
!= cmd
))
1290 mips_error ("Bad response from remote board");
1296 /* FIXME: This will returns MIPS errno numbers, which may or may
1297 not be the same as errno values used on other systems. If
1298 they stick to common errno values, they will be the same, but
1299 if they don't, they must be translated. */
1310 mips_initialize_cleanups (arg
)
1313 mips_initializing
= 0;
1317 mips_exit_cleanups (arg
)
1324 mips_send_command (cmd
, prompt
)
1328 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1332 mips_expect (mips_monitor_prompt
);
1335 /* Enter remote (dbx) debug mode: */
1339 /* Reset the sequence numbers, ready for the new debug sequence: */
1341 mips_receive_seq
= 0;
1343 if (mips_monitor
!= MON_IDT
)
1344 mips_send_command ("debug\r", 0);
1345 else /* assume IDT monitor by default */
1346 mips_send_command ("db tty0\r", 0);
1349 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1351 /* We don't need to absorb any spurious characters here, since the
1352 mips_receive_header will eat up a reasonable number of characters
1353 whilst looking for the SYN, however this avoids the "garbage"
1354 being displayed to the user. */
1355 if (mips_monitor
!= MON_IDT
)
1359 char buff
[DATA_MAXLEN
+ 1];
1360 if (mips_receive_packet (buff
, 1, 3) < 0)
1361 mips_error ("Failed to initialize (didn't receive packet).");
1365 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1370 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1374 if (mips_monitor
!= MON_IDT
)
1376 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1377 so we do not get a reply to this command: */
1378 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1379 mips_need_reply
= 0;
1380 if (!mips_expect (" break!"))
1384 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1386 if (!mips_expect (mips_monitor_prompt
))
1389 do_cleanups (old_cleanups
);
1394 /* Initialize a new connection to the MIPS board, and make sure we are
1395 really connected. */
1401 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1404 /* What is this code doing here? I don't see any way it can happen, and
1405 it might mean mips_initializing didn't get cleared properly.
1406 So I'll make it a warning. */
1408 if (mips_initializing
)
1410 warning ("internal error: mips_initialize called twice");
1415 mips_initializing
= 1;
1417 /* At this point, the packit protocol isn't responding. We'll try getting
1418 into the monitor, and restarting the protocol. */
1420 /* Force the system into the monitor. After this we *should* be at
1421 the mips_monitor_prompt. */
1422 if (mips_monitor
!= MON_IDT
)
1423 j
= 0; /* start by checking if we are already at the prompt */
1425 j
= 1; /* start by sending a break */
1430 case 0: /* First, try sending a CR */
1431 SERIAL_FLUSH_INPUT (mips_desc
);
1432 SERIAL_WRITE (mips_desc
, "\r", 1);
1434 case 1: /* First, try sending a break */
1435 SERIAL_SEND_BREAK (mips_desc
);
1437 case 2: /* Then, try a ^C */
1438 SERIAL_WRITE (mips_desc
, "\003", 1);
1440 case 3: /* Then, try escaping from download */
1442 if (mips_monitor
!= MON_IDT
)
1446 /* We shouldn't need to send multiple termination
1447 sequences, since the target performs line (or
1448 block) reads, and then processes those
1449 packets. In-case we were downloading a large packet
1450 we flush the output buffer before inserting a
1451 termination sequence. */
1452 SERIAL_FLUSH_OUTPUT (mips_desc
);
1453 sprintf (tbuff
, "\r/E/E\r");
1454 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1461 /* We are possibly in binary download mode, having
1462 aborted in the middle of an S-record. ^C won't
1463 work because of binary mode. The only reliable way
1464 out is to send enough termination packets (8 bytes)
1465 to fill up and then overflow the largest size
1466 S-record (255 bytes in this case). This amounts to
1470 mips_make_srec (srec
, '7', 0, NULL
, 0);
1472 for (i
= 1; i
<= 33; i
++)
1474 SERIAL_WRITE (mips_desc
, srec
, 8);
1476 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1477 break; /* Break immediatly if we get something from
1484 mips_error ("Failed to initialize.");
1487 if (mips_expect (mips_monitor_prompt
))
1491 if (mips_monitor
!= MON_IDT
)
1493 /* Sometimes PMON ignores the first few characters in the first
1494 command sent after a load. Sending a blank command gets
1496 mips_send_command ("\r", -1);
1498 /* Ensure the correct target state: */
1499 if (mips_monitor
!= MON_LSI
)
1500 mips_send_command ("set regsize 64\r", -1);
1501 mips_send_command ("set hostport tty0\r", -1);
1502 mips_send_command ("set brkcmd \"\"\r", -1);
1503 /* Delete all the current breakpoints: */
1504 mips_send_command ("db *\r", -1);
1505 /* NOTE: PMON does not have breakpoint support through the
1506 "debug" mode, only at the monitor command-line. */
1509 mips_enter_debug ();
1511 /* Clear all breakpoints: */
1512 if ((mips_monitor
== MON_IDT
1513 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1514 || mips_monitor
== MON_LSI
)
1515 monitor_supports_breakpoints
= 1;
1517 monitor_supports_breakpoints
= 0;
1519 do_cleanups (old_cleanups
);
1521 /* If this doesn't call error, we have connected; we don't care if
1522 the request itself succeeds or fails. */
1524 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1525 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1526 select_frame (get_current_frame (), 0);
1529 /* Open a connection to the remote board. */
1531 common_open (ops
, name
, from_tty
, new_monitor
, new_monitor_prompt
)
1532 struct target_ops
*ops
;
1535 enum mips_monitor_type new_monitor
;
1536 char *new_monitor_prompt
;
1539 char *serial_port_name
;
1540 char *remote_name
= 0;
1541 char *local_name
= 0;
1546 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1547 device is attached to the target board (e.g., /dev/ttya).\n"
1548 "If you want to use TFTP to download to the board, specify the name of a\n"
1549 "temporary file to be used by GDB for downloads as the second argument.\n"
1550 "This filename must be in the form host:filename, where host is the name\n"
1551 "of the host running the TFTP server, and the file must be readable by the\n"
1552 "world. If the local name of the temporary file differs from the name as\n"
1553 "seen from the board via TFTP, specify that name as the third parameter.\n");
1555 /* Parse the serial port name, the optional TFTP name, and the
1556 optional local TFTP name. */
1557 if ((argv
= buildargv (name
)) == NULL
)
1559 make_cleanup_freeargv (argv
);
1561 serial_port_name
= strsave (argv
[0]);
1562 if (argv
[1]) /* remote TFTP name specified? */
1564 remote_name
= argv
[1];
1565 if (argv
[2]) /* local TFTP filename specified? */
1566 local_name
= argv
[2];
1569 target_preopen (from_tty
);
1572 unpush_target (current_ops
);
1574 /* Open and initialize the serial port. */
1575 mips_desc
= SERIAL_OPEN (serial_port_name
);
1576 if (mips_desc
== (serial_t
) NULL
)
1577 perror_with_name (serial_port_name
);
1579 if (baud_rate
!= -1)
1581 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1583 SERIAL_CLOSE (mips_desc
);
1584 perror_with_name (serial_port_name
);
1588 SERIAL_RAW (mips_desc
);
1590 /* Open and initialize the optional download port. If it is in the form
1591 hostname#portnumber, it's a UDP socket. If it is in the form
1592 hostname:filename, assume it's the TFTP filename that must be
1593 passed to the DDB board to tell it where to get the load file. */
1596 if (strchr (remote_name
, '#'))
1598 udp_desc
= SERIAL_OPEN (remote_name
);
1600 perror_with_name ("Unable to open UDP port");
1605 /* Save the remote and local names of the TFTP temp file. If
1606 the user didn't specify a local name, assume it's the same
1607 as the part of the remote name after the "host:". */
1611 free (tftp_localname
);
1612 if (local_name
== NULL
)
1613 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1614 local_name
++; /* skip over the colon */
1615 if (local_name
== NULL
)
1616 local_name
= remote_name
; /* local name same as remote name */
1617 tftp_name
= strsave (remote_name
);
1618 tftp_localname
= strsave (local_name
);
1626 /* Reset the expected monitor prompt if it's never been set before. */
1627 if (mips_monitor_prompt
== NULL
)
1628 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1629 mips_monitor
= new_monitor
;
1634 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1636 /* Switch to using remote target now. */
1639 /* FIXME: Should we call start_remote here? */
1641 /* Try to figure out the processor model if possible. */
1642 ptype
= mips_read_processor_type ();
1644 mips_set_processor_type_command (strsave (ptype
), 0);
1646 /* This is really the job of start_remote however, that makes an assumption
1647 that the target is about to print out a status message of some sort. That
1648 doesn't happen here (in fact, it may not be possible to get the monitor to
1649 send the appropriate packet). */
1651 flush_cached_frames ();
1652 registers_changed ();
1653 stop_pc
= read_pc ();
1654 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1655 select_frame (get_current_frame (), 0);
1656 print_stack_frame (selected_frame
, -1, 1);
1657 free (serial_port_name
);
1661 mips_open (name
, from_tty
)
1665 const char *monitor_prompt
= NULL
;
1666 if (TARGET_ARCHITECTURE
!= NULL
1667 && TARGET_ARCHITECTURE
->arch
== bfd_arch_mips
)
1669 switch (TARGET_ARCHITECTURE
->mach
)
1671 case bfd_mach_mips4100
:
1672 case bfd_mach_mips4300
:
1673 case bfd_mach_mips4600
:
1674 case bfd_mach_mips4650
:
1675 case bfd_mach_mips5000
:
1676 monitor_prompt
= "<RISQ> ";
1680 if (monitor_prompt
== NULL
)
1681 monitor_prompt
= "<IDT>";
1682 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1686 pmon_open (name
, from_tty
)
1690 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1694 ddb_open (name
, from_tty
)
1698 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1702 lsi_open (name
, from_tty
)
1708 /* Clear the LSI breakpoint table. */
1709 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1710 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1712 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1715 /* Close a connection to the remote board. */
1718 mips_close (quitting
)
1723 /* Get the board out of remote debugging mode. */
1724 (void) mips_exit_debug ();
1730 /* Detach from the remote board. */
1733 mips_detach (args
, from_tty
)
1738 error ("Argument given to \"detach\" when remotely debugging.");
1745 printf_unfiltered ("Ending remote MIPS debugging.\n");
1748 /* Tell the target board to resume. This does not wait for a reply
1749 from the board, except in the case of single-stepping on LSI boards,
1750 where PMON does return a reply. */
1753 mips_resume (pid
, step
, siggnal
)
1755 enum target_signal siggnal
;
1759 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1760 a single step, so we wait for that. */
1761 mips_request (step
? 's' : 'c', 1, siggnal
,
1762 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1763 mips_receive_wait
, NULL
);
1766 /* Return the signal corresponding to SIG, where SIG is the number which
1767 the MIPS protocol uses for the signal. */
1769 mips_signal_from_protocol (sig
)
1772 /* We allow a few more signals than the IDT board actually returns, on
1773 the theory that there is at least *some* hope that perhaps the numbering
1774 for these signals is widely agreed upon. */
1777 return TARGET_SIGNAL_UNKNOWN
;
1779 /* Don't want to use target_signal_from_host because we are converting
1780 from MIPS signal numbers, not host ones. Our internal numbers
1781 match the MIPS numbers for the signals the board can return, which
1782 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1783 return (enum target_signal
) sig
;
1786 /* Wait until the remote stops, and return a wait status. */
1789 mips_wait (pid
, status
)
1791 struct target_waitstatus
*status
;
1795 char buff
[DATA_MAXLEN
];
1801 interrupt_count
= 0;
1804 /* If we have not sent a single step or continue command, then the
1805 board is waiting for us to do something. Return a status
1806 indicating that it is stopped. */
1807 if (!mips_need_reply
)
1809 status
->kind
= TARGET_WAITKIND_STOPPED
;
1810 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1814 /* No timeout; we sit here as long as the program continues to execute. */
1816 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1819 mips_error ("Remote failure: %s", safe_strerror (errno
));
1821 /* On returning from a continue, the PMON monitor seems to start
1822 echoing back the messages we send prior to sending back the
1823 ACK. The code can cope with this, but to try and avoid the
1824 unnecessary serial traffic, and "spurious" characters displayed
1825 to the user, we cheat and reset the debug protocol. The problems
1826 seems to be caused by a check on the number of arguments, and the
1827 command length, within the monitor causing it to echo the command
1829 if (mips_monitor
== MON_PMON
)
1832 mips_enter_debug ();
1835 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1837 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1838 &rpc
, &rfp
, &rsp
, flags
);
1841 char buf
[MAX_REGISTER_RAW_SIZE
];
1843 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1844 supply_register (PC_REGNUM
, buf
);
1846 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1847 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1849 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1850 supply_register (SP_REGNUM
, buf
);
1852 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1853 supply_register (FP_REGNUM
, buf
);
1859 for (i
= 0; i
<= 2; i
++)
1860 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1862 else if (flags
[i
] == '\000')
1867 if (strcmp (target_shortname
, "lsi") == 0)
1870 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1871 Right now, PMON doesn't give us enough information to determine which
1872 breakpoint we hit. So we have to look up the PC in our own table
1873 of breakpoints, and if found, assume it's just a normal instruction
1874 fetch breakpoint, not a data watchpoint. FIXME when PMON
1875 provides some way to tell us what type of breakpoint it is. */
1877 CORE_ADDR pc
= read_pc ();
1880 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1882 if (lsi_breakpoints
[i
].addr
== pc
1883 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1890 /* If a data breakpoint was hit, PMON returns the following packet:
1892 The return packet from an ordinary breakpoint doesn't have the
1893 extra 0x01 field tacked onto the end. */
1894 if (nfields
== 1 && rpc
== 1)
1899 /* NOTE: The following (sig) numbers are defined by PMON:
1900 SPP_SIGTRAP 5 breakpoint
1908 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1909 and so on, because the constants we want here are determined by the
1910 MIPS protocol and have nothing to do with what host we are running on. */
1911 if ((rstatus
& 0xff) == 0)
1913 status
->kind
= TARGET_WAITKIND_EXITED
;
1914 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1916 else if ((rstatus
& 0xff) == 0x7f)
1918 status
->kind
= TARGET_WAITKIND_STOPPED
;
1919 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1921 /* If the stop PC is in the _exit function, assume
1922 we hit the 'break 0x3ff' instruction in _exit, so this
1923 is not a normal breakpoint. */
1924 if (strcmp (target_shortname
, "lsi") == 0)
1927 CORE_ADDR func_start
;
1928 CORE_ADDR pc
= read_pc ();
1930 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1931 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1932 && func_start
== pc
)
1933 status
->kind
= TARGET_WAITKIND_EXITED
;
1938 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1939 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1945 /* We have to map between the register numbers used by gdb and the
1946 register numbers used by the debugging protocol. This function
1947 assumes that we are using tm-mips.h. */
1949 #define REGNO_OFFSET 96
1952 mips_map_regno (regno
)
1957 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1958 return regno
- FP0_REGNUM
+ 32;
1962 return REGNO_OFFSET
+ 0;
1964 return REGNO_OFFSET
+ 1;
1966 return REGNO_OFFSET
+ 2;
1968 return REGNO_OFFSET
+ 3;
1970 return REGNO_OFFSET
+ 4;
1972 return REGNO_OFFSET
+ 5;
1974 /* FIXME: Is there a way to get the status register? */
1979 /* Fetch the remote registers. */
1982 mips_fetch_registers (regno
)
1985 unsigned LONGEST val
;
1990 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1991 mips_fetch_registers (regno
);
1995 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1996 /* FP_REGNUM on the mips is a hack which is just supposed to read
1997 zero (see also mips-nat.c). */
2001 /* If PMON doesn't support this register, don't waste serial
2002 bandwidth trying to read it. */
2003 int pmon_reg
= mips_map_regno (regno
);
2004 if (regno
!= 0 && pmon_reg
== 0)
2008 /* Unfortunately the PMON version in the Vr4300 board has been
2009 compiled without the 64bit register access commands. This
2010 means we cannot get hold of the full register width. */
2011 if (mips_monitor
== MON_DDB
)
2012 val
= (unsigned) mips_request ('t', pmon_reg
, 0,
2013 &err
, mips_receive_wait
, NULL
);
2015 val
= mips_request ('r', pmon_reg
, 0,
2016 &err
, mips_receive_wait
, NULL
);
2018 mips_error ("Can't read register %d: %s", regno
,
2019 safe_strerror (errno
));
2024 char buf
[MAX_REGISTER_RAW_SIZE
];
2026 /* We got the number the register holds, but gdb expects to see a
2027 value in the target byte ordering. */
2028 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
2029 supply_register (regno
, buf
);
2033 /* Prepare to store registers. The MIPS protocol can store individual
2034 registers, so this function doesn't have to do anything. */
2037 mips_prepare_to_store ()
2041 /* Store remote register(s). */
2044 mips_store_registers (regno
)
2051 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2052 mips_store_registers (regno
);
2056 mips_request ('R', mips_map_regno (regno
),
2057 read_register (regno
),
2058 &err
, mips_receive_wait
, NULL
);
2060 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2063 /* Fetch a word from the target board. */
2066 mips_fetch_word (addr
)
2072 val
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2075 /* Data space failed; try instruction space. */
2076 val
= mips_request ('i', addr
, 0, &err
,
2077 mips_receive_wait
, NULL
);
2079 mips_error ("Can't read address 0x%s: %s",
2080 paddr_nz (addr
), safe_strerror (errno
));
2085 /* Store a word to the target board. Returns errno code or zero for
2086 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2087 memory location there. */
2089 /* FIXME! make sure only 32-bit quantities get stored! */
2091 mips_store_word (addr
, val
, old_contents
)
2097 unsigned int oldcontents
;
2099 oldcontents
= mips_request ('D', addr
, val
, &err
,
2100 mips_receive_wait
, NULL
);
2103 /* Data space failed; try instruction space. */
2104 oldcontents
= mips_request ('I', addr
, val
, &err
,
2105 mips_receive_wait
, NULL
);
2109 if (old_contents
!= NULL
)
2110 store_unsigned_integer (old_contents
, 4, oldcontents
);
2114 /* Read or write LEN bytes from inferior memory at MEMADDR,
2115 transferring to or from debugger address MYADDR. Write to inferior
2116 if SHOULD_WRITE is nonzero. Returns length of data written or
2117 read; 0 for error. Note that protocol gives us the correct value
2118 for a longword, since it transfers values in ASCII. We want the
2119 byte values, so we have to swap the longword values. */
2121 static int mask_address_p
= 1;
2124 mips_xfer_memory (memaddr
, myaddr
, len
, write
, ignore
)
2129 struct target_ops
*ignore
;
2137 /* PMON targets do not cope well with 64 bit addresses. Mask the
2138 value down to 32 bits. */
2140 memaddr
&= (CORE_ADDR
) 0xffffffff;
2142 /* Round starting address down to longword boundary. */
2143 addr
= memaddr
& ~3;
2144 /* Round ending address up; get number of longwords that makes. */
2145 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2146 /* Allocate buffer of that many longwords. */
2147 buffer
= alloca (count
* 4);
2151 /* Fill start and end extra bytes of buffer with existing data. */
2152 if (addr
!= memaddr
|| len
< 4)
2154 /* Need part of initial word -- fetch it. */
2155 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2160 /* Need part of last word -- fetch it. FIXME: we do this even
2161 if we don't need it. */
2162 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2163 mips_fetch_word (addr
+ (count
- 1) * 4));
2166 /* Copy data to be written over corresponding part of buffer */
2168 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2170 /* Write the entire buffer. */
2172 for (i
= 0; i
< count
; i
++, addr
+= 4)
2174 status
= mips_store_word (addr
,
2175 extract_unsigned_integer (&buffer
[i
* 4], 4),
2177 /* Report each kilobyte (we download 32-bit words at a time) */
2180 printf_unfiltered ("*");
2181 gdb_flush (gdb_stdout
);
2188 /* FIXME: Do we want a QUIT here? */
2191 printf_unfiltered ("\n");
2195 /* Read all the longwords */
2196 for (i
= 0; i
< count
; i
++, addr
+= 4)
2198 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2202 /* Copy appropriate bytes out of the buffer. */
2203 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2208 /* Print info on this target. */
2211 mips_files_info (ignore
)
2212 struct target_ops
*ignore
;
2214 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2217 /* Kill the process running on the board. This will actually only
2218 work if we are doing remote debugging over the console input. I
2219 think that if IDT/sim had the remote debug interrupt enabled on the
2220 right port, we could interrupt the process with a break signal. */
2225 if (!mips_wait_flag
)
2230 if (interrupt_count
>= 2)
2232 interrupt_count
= 0;
2234 target_terminal_ours ();
2236 if (query ("Interrupted while waiting for the program.\n\
2237 Give up (and stop debugging it)? "))
2239 /* Clean up in such a way that mips_close won't try to talk to the
2240 board (it almost surely won't work since we weren't able to talk to
2245 printf_unfiltered ("Ending remote MIPS debugging.\n");
2246 target_mourn_inferior ();
2248 return_to_top_level (RETURN_QUIT
);
2251 target_terminal_inferior ();
2254 if (remote_debug
> 0)
2255 printf_unfiltered ("Sending break\n");
2257 SERIAL_SEND_BREAK (mips_desc
);
2266 SERIAL_WRITE (mips_desc
, &cc
, 1);
2268 target_mourn_inferior ();
2273 /* Start running on the target board. */
2276 mips_create_inferior (execfile
, args
, env
)
2286 Can't pass arguments to remote MIPS board; arguments ignored.");
2287 /* And don't try to use them on the next "run" command. */
2288 execute_command ("set args", 0);
2291 if (execfile
== 0 || exec_bfd
== 0)
2292 error ("No executable file specified");
2294 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2296 init_wait_for_inferior ();
2298 /* FIXME: Should we set inferior_pid here? */
2300 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2303 /* Clean up after a process. Actually nothing to do. */
2306 mips_mourn_inferior ()
2308 if (current_ops
!= NULL
)
2309 unpush_target (current_ops
);
2310 generic_mourn_inferior ();
2313 /* We can write a breakpoint and read the shadow contents in one
2316 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2317 support, we read the contents of the target location and stash it,
2318 then overwrite it with a breakpoint instruction. ADDR is the target
2319 location in the target machine. CONTENTS_CACHE is a pointer to
2320 memory allocated for saving the target contents. It is guaranteed
2321 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2322 is accomplished via BREAKPOINT_MAX). */
2325 mips_insert_breakpoint (addr
, contents_cache
)
2327 char *contents_cache
;
2329 if (monitor_supports_breakpoints
)
2330 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2332 return memory_insert_breakpoint (addr
, contents_cache
);
2336 mips_remove_breakpoint (addr
, contents_cache
)
2338 char *contents_cache
;
2340 if (monitor_supports_breakpoints
)
2341 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2343 return memory_remove_breakpoint (addr
, contents_cache
);
2346 #if 0 /* currently not used */
2347 /* PMON does not currently provide support for the debug mode 'b'
2348 commands to manipulate breakpoints. However, if we wanted to use
2349 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2350 then this code performs the work needed to leave debug mode,
2351 set/clear the breakpoint, and then return to debug mode. */
2353 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2354 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2355 /* NOTE: The code relies on this vector being zero-initialised by the system */
2358 pmon_insert_breakpoint (addr
, contents_cache
)
2360 char *contents_cache
;
2364 if (monitor_supports_breakpoints
)
2366 char tbuff
[12]; /* space for breakpoint command */
2370 /* PMON does not support debug level breakpoint set/remove: */
2371 if (mips_exit_debug ())
2372 mips_error ("Failed to exit debug mode");
2374 sprintf (tbuff
, "b %08x\r", addr
);
2375 mips_send_command (tbuff
, 0);
2377 mips_expect ("Bpt ");
2379 if (!mips_getstring (tbuff
, 2))
2381 tbuff
[2] = '\0'; /* terminate the string */
2382 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2384 fprintf_unfiltered (gdb_stderr
,
2385 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2389 mips_expect (" = ");
2391 /* Lead in the hex number we are expecting: */
2395 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2396 which targets return 64-bit addresses? PMON returns only 32! */
2397 if (!mips_getstring (&tbuff
[2], 8))
2399 tbuff
[10] = '\0'; /* terminate the string */
2401 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2403 fprintf_unfiltered (gdb_stderr
,
2404 "Invalid hex address from target: %s\n", tbuff
);
2408 if (bpnum
>= PMON_MAX_BP
)
2410 fprintf_unfiltered (gdb_stderr
,
2411 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2412 bpnum
, PMON_MAX_BP
- 1);
2417 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2419 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2421 mips_expect ("\r\n");
2422 mips_expect (mips_monitor_prompt
);
2424 mips_enter_debug ();
2429 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2433 pmon_remove_breakpoint (addr
, contents_cache
)
2435 char *contents_cache
;
2437 if (monitor_supports_breakpoints
)
2440 char tbuff
[7]; /* enough for delete breakpoint command */
2442 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2443 if (mips_pmon_bp_info
[bpnum
] == addr
)
2446 if (bpnum
>= PMON_MAX_BP
)
2448 fprintf_unfiltered (gdb_stderr
,
2449 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2454 if (mips_exit_debug ())
2455 mips_error ("Failed to exit debug mode");
2457 sprintf (tbuff
, "db %02d\r", bpnum
);
2459 mips_send_command (tbuff
, -1);
2460 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2461 set" message will be returned. */
2463 mips_enter_debug ();
2468 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2473 /* Tell whether this target can support a hardware breakpoint. CNT
2474 is the number of hardware breakpoints already installed. This
2475 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2478 remote_mips_can_use_hardware_watchpoint (cnt
)
2481 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2485 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2486 This is used for memory ref breakpoints. */
2488 static unsigned long
2489 calculate_mask (addr
, len
)
2496 mask
= addr
^ (addr
+ len
- 1);
2498 for (i
= 32; i
>= 0; i
--)
2504 mask
= (unsigned long) 0xffffffff >> i
;
2510 /* Insert a hardware breakpoint. This works only on LSI targets, which
2511 implement ordinary breakpoints using hardware facilities. */
2514 remote_mips_insert_hw_breakpoint (addr
, contents_cache
)
2516 char *contents_cache
;
2518 if (strcmp (target_shortname
, "lsi") == 0)
2519 return mips_insert_breakpoint (addr
, contents_cache
);
2525 /* Remove a hardware breakpoint. This works only on LSI targets, which
2526 implement ordinary breakpoints using hardware facilities. */
2529 remote_mips_remove_hw_breakpoint (addr
, contents_cache
)
2531 char *contents_cache
;
2533 if (strcmp (target_shortname
, "lsi") == 0)
2534 return mips_remove_breakpoint (addr
, contents_cache
);
2539 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2540 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2544 remote_mips_set_watchpoint (addr
, len
, type
)
2549 if (set_breakpoint (addr
, len
, type
))
2556 remote_mips_remove_watchpoint (addr
, len
, type
)
2561 if (clear_breakpoint (addr
, len
, type
))
2568 remote_mips_stopped_by_watchpoint (void)
2570 return hit_watchpoint
;
2574 /* Insert a breakpoint. */
2577 set_breakpoint (addr
, len
, type
)
2580 enum break_type type
;
2582 return common_breakpoint (1, addr
, len
, type
);
2586 /* Clear a breakpoint. */
2589 clear_breakpoint (addr
, len
, type
)
2592 enum break_type type
;
2594 return common_breakpoint (0, addr
, len
, type
);
2598 /* Check the error code from the return packet for an LSI breakpoint
2599 command. If there's no error, just return 0. If it's a warning,
2600 print the warning text and return 0. If it's an error, print
2601 the error text and return 1. <ADDR> is the address of the breakpoint
2602 that was being set. <RERRFLG> is the error code returned by PMON.
2603 This is a helper function for common_breakpoint. */
2606 check_lsi_error (addr
, rerrflg
)
2610 struct lsi_error
*err
;
2611 char *saddr
= paddr_nz (addr
); /* printable address string */
2613 if (rerrflg
== 0) /* no error */
2616 /* Warnings can be ORed together, so check them all. */
2617 if (rerrflg
& W_WARN
)
2619 if (monitor_warnings
)
2622 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2624 if ((err
->code
& rerrflg
) == err
->code
)
2627 fprintf_unfiltered (gdb_stderr
,
2628 "common_breakpoint (0x%s): Warning: %s\n",
2634 fprintf_unfiltered (gdb_stderr
,
2635 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2642 /* Errors are unique, i.e. can't be ORed together. */
2643 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2645 if ((err
->code
& rerrflg
) == err
->code
)
2647 fprintf_unfiltered (gdb_stderr
,
2648 "common_breakpoint (0x%s): Error: %s\n",
2654 fprintf_unfiltered (gdb_stderr
,
2655 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2662 /* This routine sends a breakpoint command to the remote target.
2664 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2665 <ADDR> is the address of the breakpoint.
2666 <LEN> the length of the region to break on.
2667 <TYPE> is the type of breakpoint:
2668 0 = write (BREAK_WRITE)
2669 1 = read (BREAK_READ)
2670 2 = read/write (BREAK_ACCESS)
2671 3 = instruction fetch (BREAK_FETCH)
2673 Return 0 if successful; otherwise 1. */
2676 common_breakpoint (set
, addr
, len
, type
)
2680 enum break_type type
;
2682 char buf
[DATA_MAXLEN
+ 1];
2684 int rpid
, rerrflg
, rresponse
, rlen
;
2687 addr
= ADDR_BITS_REMOVE (addr
);
2689 if (mips_monitor
== MON_LSI
)
2691 if (set
== 0) /* clear breakpoint */
2693 /* The LSI PMON "clear breakpoint" has this form:
2694 <pid> 'b' <bptn> 0x0
2696 <pid> 'b' 0x0 <code>
2698 <bptn> is a breakpoint number returned by an earlier 'B' command.
2699 Possible return codes: OK, E_BPT. */
2703 /* Search for the breakpoint in the table. */
2704 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2705 if (lsi_breakpoints
[i
].type
== type
2706 && lsi_breakpoints
[i
].addr
== addr
2707 && lsi_breakpoints
[i
].len
== len
)
2710 /* Clear the table entry and tell PMON to clear the breakpoint. */
2711 if (i
== MAX_LSI_BREAKPOINTS
)
2713 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2718 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2719 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2720 mips_send_packet (buf
, 1);
2722 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2725 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2727 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2729 return (check_lsi_error (addr
, rerrflg
));
2732 /* set a breakpoint */
2734 /* The LSI PMON "set breakpoint" command has this form:
2735 <pid> 'B' <addr> 0x0
2737 <pid> 'B' <bptn> <code>
2739 The "set data breakpoint" command has this form:
2741 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2743 where: type= "0x1" = read
2745 "0x3" = access (read or write)
2747 The reply returns two values:
2748 bptn - a breakpoint number, which is a small integer with
2749 possible values of zero through 255.
2750 code - an error return code, a value of zero indicates a
2751 succesful completion, other values indicate various
2752 errors and warnings.
2754 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2758 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2761 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2767 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2768 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2769 paddr_nz (addr
+ len
- 1));
2771 mips_send_packet (buf
, 1);
2773 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2776 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2777 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2778 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2779 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2782 if (check_lsi_error (addr
, rerrflg
))
2785 /* rresponse contains PMON's breakpoint number. Record the
2786 information for this breakpoint so we can clear it later. */
2787 lsi_breakpoints
[rresponse
].type
= type
;
2788 lsi_breakpoints
[rresponse
].addr
= addr
;
2789 lsi_breakpoints
[rresponse
].len
= len
;
2796 /* On non-LSI targets, the breakpoint command has this form:
2797 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2798 <MASK> is a don't care mask for addresses.
2799 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2803 mask
= calculate_mask (addr
, len
);
2806 if (set
) /* set a breakpoint */
2811 case BREAK_WRITE
: /* write */
2814 case BREAK_READ
: /* read */
2817 case BREAK_ACCESS
: /* read/write */
2820 case BREAK_FETCH
: /* fetch */
2828 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2829 paddr_nz (mask
), flags
);
2834 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2837 mips_send_packet (buf
, 1);
2839 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2842 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2843 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2845 if (nfields
!= 4 || rcmd
!= cmd
)
2846 mips_error ("common_breakpoint: Bad response from remote board: %s",
2851 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2852 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2853 if (mips_monitor
== MON_DDB
)
2854 rresponse
= rerrflg
;
2855 if (rresponse
!= 22) /* invalid argument */
2856 fprintf_unfiltered (gdb_stderr
,
2857 "common_breakpoint (0x%s): Got error: 0x%x\n",
2858 paddr_nz (addr
), rresponse
);
2866 send_srec (srec
, len
, addr
)
2875 SERIAL_WRITE (mips_desc
, srec
, len
);
2877 ch
= mips_readchar (2);
2881 case SERIAL_TIMEOUT
:
2882 error ("Timeout during download.");
2886 case 0x15: /* NACK */
2887 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr
));
2890 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2895 /* Download a binary file by converting it to S records. */
2898 mips_load_srec (args
)
2903 char *buffer
, srec
[1024];
2905 unsigned int srec_frame
= 200;
2907 static int hashmark
= 1;
2909 buffer
= alloca (srec_frame
* 2 + 256);
2911 abfd
= bfd_openr (args
, 0);
2914 printf_filtered ("Unable to open file %s\n", args
);
2918 if (bfd_check_format (abfd
, bfd_object
) == 0)
2920 printf_filtered ("File is not an object file\n");
2924 /* This actually causes a download in the IDT binary format: */
2925 mips_send_command (LOAD_CMD
, 0);
2927 for (s
= abfd
->sections
; s
; s
= s
->next
)
2929 if (s
->flags
& SEC_LOAD
)
2931 unsigned int numbytes
;
2933 /* FIXME! vma too small????? */
2934 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2936 (long) (s
->vma
+ s
->_raw_size
));
2937 gdb_flush (gdb_stdout
);
2939 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2941 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2943 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2945 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2946 send_srec (srec
, reclen
, s
->vma
+ i
);
2950 putchar_unfiltered ('#');
2951 gdb_flush (gdb_stdout
);
2954 } /* Per-packet (or S-record) loop */
2956 putchar_unfiltered ('\n');
2957 } /* Loadable sections */
2960 putchar_unfiltered ('\n');
2962 /* Write a type 7 terminator record. no data for a type 7, and there
2963 is no data, so len is 0. */
2965 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2967 send_srec (srec
, reclen
, abfd
->start_address
);
2969 SERIAL_FLUSH_INPUT (mips_desc
);
2973 * mips_make_srec -- make an srecord. This writes each line, one at a
2974 * time, each with it's own header and trailer line.
2975 * An srecord looks like this:
2977 * byte count-+ address
2978 * start ---+ | | data +- checksum
2980 * S01000006F6B692D746573742E73726563E4
2981 * S315000448600000000000000000FC00005900000000E9
2982 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2983 * S30B0004485A0000000000004E
2986 * S<type><length><address><data><checksum>
2990 * is the number of bytes following upto the checksum. Note that
2991 * this is not the number of chars following, since it takes two
2992 * chars to represent a byte.
2996 * 1) two byte address data record
2997 * 2) three byte address data record
2998 * 3) four byte address data record
2999 * 7) four byte address termination record
3000 * 8) three byte address termination record
3001 * 9) two byte address termination record
3004 * is the start address of the data following, or in the case of
3005 * a termination record, the start address of the image
3009 * is the sum of all the raw byte data in the record, from the length
3010 * upwards, modulo 256 and subtracted from 255.
3012 * This routine returns the length of the S-record.
3017 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
3021 unsigned char *myaddr
;
3024 unsigned char checksum
;
3027 /* Create the header for the srec. addr_size is the number of bytes in the address,
3028 and 1 is the number of bytes in the count. */
3030 /* FIXME!! bigger buf required for 64-bit! */
3033 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
3034 /* This assumes S3 style downloads (4byte addresses). There should
3035 probably be a check, or the code changed to make it more
3037 buf
[3] = memaddr
>> 24;
3038 buf
[4] = memaddr
>> 16;
3039 buf
[5] = memaddr
>> 8;
3041 memcpy (&buf
[7], myaddr
, len
);
3043 /* Note that the checksum is calculated on the raw data, not the
3044 hexified data. It includes the length, address and the data
3045 portions of the packet. */
3047 buf
+= 2; /* Point at length byte */
3048 for (i
= 0; i
< len
+ 4 + 1; i
++)
3056 /* The following manifest controls whether we enable the simple flow
3057 control support provided by the monitor. If enabled the code will
3058 wait for an affirmative ACK between transmitting packets. */
3059 #define DOETXACK (1)
3061 /* The PMON fast-download uses an encoded packet format constructed of
3062 3byte data packets (encoded as 4 printable ASCII characters), and
3063 escape sequences (preceded by a '/'):
3066 'C' compare checksum (12bit value, not included in checksum calculation)
3067 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3068 'Z' zero fill multiple of 3bytes
3069 'B' byte (12bit encoded value, of 8bit data)
3070 'A' address (36bit encoded value)
3071 'E' define entry as original address, and exit load
3073 The packets are processed in 4 character chunks, so the escape
3074 sequences that do not have any data (or variable length data)
3075 should be padded to a 4 character boundary. The decoder will give
3076 an error if the complete message block size is not a multiple of
3077 4bytes (size of record).
3079 The encoding of numbers is done in 6bit fields. The 6bit value is
3080 used to index into this string to get the specific character
3081 encoding for the value: */
3082 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3084 /* Convert the number of bits required into an encoded number, 6bits
3085 at a time (range 0..63). Keep a checksum if required (passed
3086 pointer non-NULL). The function returns the number of encoded
3087 characters written into the buffer. */
3089 pmon_makeb64 (v
, p
, n
, chksum
)
3095 int count
= (n
/ 6);
3099 fprintf_unfiltered (gdb_stderr
,
3100 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
3105 fprintf_unfiltered (gdb_stderr
,
3106 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3110 /* Deal with the checksum: */
3116 *chksum
+= ((v
>> 24) & 0xFFF);
3118 *chksum
+= ((v
>> 12) & 0xFFF);
3120 *chksum
+= ((v
>> 0) & 0xFFF);
3127 *p
++ = encoding
[(v
>> n
) & 0x3F];
3134 /* Shorthand function (that could be in-lined) to output the zero-fill
3135 escape sequence into the data stream. */
3137 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3141 unsigned int *chksum
;
3145 sprintf (*buff
, "/Z");
3146 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3147 *buff
+= (count
+ 2);
3149 return (recsize
+ count
+ 2);
3153 pmon_checkset (recsize
, buff
, value
)
3160 /* Add the checksum (without updating the value): */
3161 sprintf (*buff
, "/C");
3162 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3163 *buff
+= (count
+ 2);
3164 sprintf (*buff
, "\n");
3165 *buff
+= 2; /* include zero terminator */
3166 /* Forcing a checksum validation clears the sum: */
3168 return (recsize
+ count
+ 3);
3171 /* Amount of padding we leave after at the end of the output buffer,
3172 for the checksum and line termination characters: */
3173 #define CHECKSIZE (4 + 4 + 4 + 2)
3174 /* zero-fill, checksum, transfer end and line termination space. */
3176 /* The amount of binary data loaded from the object file in a single
3178 #define BINCHUNK (1024)
3180 /* Maximum line of data accepted by the monitor: */
3181 #define MAXRECSIZE (550)
3182 /* NOTE: This constant depends on the monitor being used. This value
3183 is for PMON 5.x on the Cogent Vr4300 board. */
3186 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3188 unsigned char *inbuf
;
3193 unsigned int *zerofill
;
3198 /* This is a simple check to ensure that our data will fit within
3199 the maximum allowable record size. Each record output is 4bytes
3200 in length. We must allow space for a pending zero fill command,
3201 the record, and a checksum record. */
3202 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3204 /* Process the binary data: */
3205 if ((inamount
- *inptr
) < 3)
3208 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3210 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3212 *recsize
+= (2 + count
);
3217 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3218 /* Simple check for zero data. TODO: A better check would be
3219 to check the last, and then the middle byte for being zero
3220 (if the first byte is not). We could then check for
3221 following runs of zeros, and if above a certain size it is
3222 worth the 4 or 8 character hit of the byte insertions used
3223 to pad to the start of the zeroes. NOTE: This also depends
3224 on the alignment at the end of the zero run. */
3225 if (value
== 0x00000000)
3228 if (*zerofill
== 0xFFF) /* 12bit counter */
3229 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3234 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3235 count
= pmon_makeb64 (value
, p
, 24, csum
);
3248 pmon_check_ack (mesg
)
3251 #if defined(DOETXACK)
3256 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3257 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3259 fprintf_unfiltered (gdb_stderr
,
3260 "Failed to receive valid ACK for %s\n", mesg
);
3261 return (-1); /* terminate the download */
3264 #endif /* DOETXACK */
3268 /* pmon_download - Send a sequence of characters to the PMON download port,
3269 which is either a serial port or a UDP socket. */
3272 pmon_start_download ()
3276 /* Create the temporary download file. */
3277 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3278 perror_with_name (tftp_localname
);
3282 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3283 mips_expect ("Downloading from ");
3284 mips_expect (udp_in_use
? "udp" : "tty0");
3285 mips_expect (", ^C to abort\r\n");
3290 mips_expect_download (char *string
)
3292 if (!mips_expect (string
))
3294 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3296 remove (tftp_localname
); /* Remove temporary file */
3304 pmon_end_download (final
, bintotal
)
3308 char hexnumber
[9]; /* includes '\0' space */
3312 static char *load_cmd_prefix
= "load -b -s ";
3316 /* Close off the temporary file containing the load data. */
3320 /* Make the temporary file readable by the world. */
3321 if (stat (tftp_localname
, &stbuf
) == 0)
3322 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3324 /* Must reinitialize the board to prevent PMON from crashing. */
3325 mips_send_command ("initEther\r", -1);
3327 /* Send the load command. */
3328 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3329 strcpy (cmd
, load_cmd_prefix
);
3330 strcat (cmd
, tftp_name
);
3332 mips_send_command (cmd
, 0);
3334 if (!mips_expect_download ("Downloading from "))
3336 if (!mips_expect_download (tftp_name
))
3338 if (!mips_expect_download (", ^C to abort\r\n"))
3342 /* Wait for the stuff that PMON prints after the load has completed.
3343 The timeout value for use in the tftp case (15 seconds) was picked
3344 arbitrarily but might be too small for really large downloads. FIXME. */
3345 if (mips_monitor
== MON_LSI
)
3347 pmon_check_ack ("termination");
3348 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3351 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3353 sprintf (hexnumber
, "%x", final
);
3354 mips_expect (hexnumber
);
3355 mips_expect ("\r\n");
3356 if (mips_monitor
!= MON_LSI
)
3357 pmon_check_ack ("termination");
3358 mips_expect ("\r\ntotal = 0x");
3359 sprintf (hexnumber
, "%x", bintotal
);
3360 mips_expect (hexnumber
);
3361 if (!mips_expect_download (" bytes\r\n"))
3365 remove (tftp_localname
); /* Remove temporary file */
3369 pmon_download (buffer
, length
)
3374 fwrite (buffer
, 1, length
, tftp_file
);
3376 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3380 pmon_load_fast (file
)
3385 unsigned char *binbuf
;
3388 unsigned int csum
= 0;
3389 int hashmark
= !tftp_in_use
;
3394 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3395 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3397 abfd
= bfd_openr (file
, 0);
3400 printf_filtered ("Unable to open file %s\n", file
);
3404 if (bfd_check_format (abfd
, bfd_object
) == 0)
3406 printf_filtered ("File is not an object file\n");
3410 /* Setup the required download state: */
3411 mips_send_command ("set dlproto etxack\r", -1);
3412 mips_send_command ("set dlecho off\r", -1);
3413 /* NOTE: We get a "cannot set variable" message if the variable is
3414 already defined to have the argument we give. The code doesn't
3415 care, since it just scans to the next prompt anyway. */
3416 /* Start the download: */
3417 pmon_start_download ();
3419 /* Zero the checksum */
3420 sprintf (buffer
, "/Kxx\n");
3421 reclen
= strlen (buffer
);
3422 pmon_download (buffer
, reclen
);
3423 finished
= pmon_check_ack ("/Kxx");
3425 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3426 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3428 bintotal
+= s
->_raw_size
;
3429 final
= (s
->vma
+ s
->_raw_size
);
3431 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3432 (unsigned int) (s
->vma
+ s
->_raw_size
));
3433 gdb_flush (gdb_stdout
);
3435 /* Output the starting address */
3436 sprintf (buffer
, "/A");
3437 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3438 buffer
[2 + reclen
] = '\n';
3439 buffer
[3 + reclen
] = '\0';
3440 reclen
+= 3; /* for the initial escape code and carriage return */
3441 pmon_download (buffer
, reclen
);
3442 finished
= pmon_check_ack ("/A");
3446 unsigned int binamount
;
3447 unsigned int zerofill
= 0;
3453 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3457 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3459 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3461 /* This keeps a rolling checksum, until we decide to output
3463 for (; ((binamount
- binptr
) > 0);)
3465 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3466 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3468 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3469 pmon_download (buffer
, reclen
);
3470 finished
= pmon_check_ack ("data record");
3473 zerofill
= 0; /* do not transmit pending zerofills */
3479 putchar_unfiltered ('#');
3480 gdb_flush (gdb_stdout
);
3484 reclen
= 0; /* buffer processed */
3489 /* Ensure no out-standing zerofill requests: */
3491 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3493 /* and then flush the line: */
3496 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3497 /* Currently pmon_checkset outputs the line terminator by
3498 default, so we write out the buffer so far: */
3499 pmon_download (buffer
, reclen
);
3500 finished
= pmon_check_ack ("record remnant");
3504 putchar_unfiltered ('\n');
3507 /* Terminate the transfer. We know that we have an empty output
3508 buffer at this point. */
3509 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3510 reclen
= strlen (buffer
);
3511 pmon_download (buffer
, reclen
);
3514 { /* Ignore the termination message: */
3515 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3518 { /* Deal with termination message: */
3519 pmon_end_download (final
, bintotal
);
3525 /* mips_load -- download a file. */
3528 mips_load (file
, from_tty
)
3532 /* Get the board out of remote debugging mode. */
3533 if (mips_exit_debug ())
3534 error ("mips_load: Couldn't get into monitor mode.");
3536 if (mips_monitor
!= MON_IDT
)
3537 pmon_load_fast (file
);
3539 mips_load_srec (file
);
3543 /* Finally, make the PC point at the start address */
3544 if (mips_monitor
!= MON_IDT
)
3546 /* Work around problem where PMON monitor updates the PC after a load
3547 to a different value than GDB thinks it has. The following ensures
3548 that the write_pc() WILL update the PC value: */
3549 register_valid
[PC_REGNUM
] = 0;
3552 write_pc (bfd_get_start_address (exec_bfd
));
3554 inferior_pid
= 0; /* No process now */
3556 /* This is necessary because many things were based on the PC at the time that
3557 we attached to the monitor, which is no longer valid now that we have loaded
3558 new code (and just changed the PC). Another way to do this might be to call
3559 normal_stop, except that the stack may not be valid, and things would get
3560 horribly confused... */
3562 clear_symtab_users ();
3566 /* Pass the command argument as a packet to PMON verbatim. */
3569 pmon_command (args
, from_tty
)
3573 char buf
[DATA_MAXLEN
+ 1];
3576 sprintf (buf
, "0x0 %s", args
);
3577 mips_send_packet (buf
, 1);
3578 printf_filtered ("Send packet: %s\n", buf
);
3580 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3582 printf_filtered ("Received packet: %s\n", buf
);
3586 _initialize_remote_mips ()
3588 /* Initialize the fields in mips_ops that are common to all four targets. */
3589 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3590 mips_ops
.to_close
= mips_close
;
3591 mips_ops
.to_detach
= mips_detach
;
3592 mips_ops
.to_resume
= mips_resume
;
3593 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3594 mips_ops
.to_store_registers
= mips_store_registers
;
3595 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3596 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3597 mips_ops
.to_files_info
= mips_files_info
;
3598 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3599 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3600 mips_ops
.to_kill
= mips_kill
;
3601 mips_ops
.to_load
= mips_load
;
3602 mips_ops
.to_create_inferior
= mips_create_inferior
;
3603 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3604 mips_ops
.to_stratum
= process_stratum
;
3605 mips_ops
.to_has_all_memory
= 1;
3606 mips_ops
.to_has_memory
= 1;
3607 mips_ops
.to_has_stack
= 1;
3608 mips_ops
.to_has_registers
= 1;
3609 mips_ops
.to_has_execution
= 1;
3610 mips_ops
.to_magic
= OPS_MAGIC
;
3612 /* Copy the common fields to all four target vectors. */
3613 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3615 /* Initialize target-specific fields in the target vectors. */
3616 mips_ops
.to_shortname
= "mips";
3617 mips_ops
.to_doc
= "\
3618 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3619 The argument is the device it is connected to or, if it contains a colon,\n\
3620 HOST:PORT to access a board over a network";
3621 mips_ops
.to_open
= mips_open
;
3622 mips_ops
.to_wait
= mips_wait
;
3624 pmon_ops
.to_shortname
= "pmon";
3625 pmon_ops
.to_doc
= "\
3626 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3627 line. The argument is the device it is connected to or, if it contains a\n\
3628 colon, HOST:PORT to access a board over a network";
3629 pmon_ops
.to_open
= pmon_open
;
3630 pmon_ops
.to_wait
= mips_wait
;
3632 ddb_ops
.to_shortname
= "ddb";
3634 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3635 line. The first argument is the device it is connected to or, if it contains\n\
3636 a colon, HOST:PORT to access a board over a network. The optional second\n\
3637 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3638 TFTP downloads to the board. The optional third parameter is the local name\n\
3639 of the TFTP temporary file, if it differs from the filename seen by the board.";
3640 ddb_ops
.to_open
= ddb_open
;
3641 ddb_ops
.to_wait
= mips_wait
;
3643 lsi_ops
.to_shortname
= "lsi";
3644 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3645 lsi_ops
.to_open
= lsi_open
;
3646 lsi_ops
.to_wait
= mips_wait
;
3648 /* Add the targets. */
3649 add_target (&mips_ops
);
3650 add_target (&pmon_ops
);
3651 add_target (&ddb_ops
);
3652 add_target (&lsi_ops
);
3655 add_set_cmd ("timeout", no_class
, var_zinteger
,
3656 (char *) &mips_receive_wait
,
3657 "Set timeout in seconds for remote MIPS serial I/O.",
3662 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3663 (char *) &mips_retransmit_wait
,
3664 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3665 This is the number of seconds to wait for an acknowledgement to a packet\n\
3666 before resending the packet.", &setlist
),
3670 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3671 (char *) &mips_syn_garbage
,
3672 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3673 This is the maximum number of characters GDB will ignore when trying to\n\
3674 synchronize with the remote system. A value of -1 means that there is no limit\n\
3675 (Note that these characters are printed out even though they are ignored.)",
3680 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3681 (char *) &mips_monitor_prompt
,
3682 "Set the prompt that GDB expects from the monitor.",
3687 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3688 (char *) &monitor_warnings
,
3689 "Set printing of monitor warnings.\n"
3690 "When enabled, monitor warnings about hardware breakpoints "
3691 "will be displayed.",
3695 add_com ("pmon <command>", class_obscure
, pmon_command
,
3696 "Send a packet to PMON (must be in debug mode).");
3698 add_show_from_set (add_set_cmd ("mask-address", no_class
,
3699 var_boolean
, &mask_address_p
,
3700 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3701 Use \"on\" to enable the masking and \"off\" to disable it.\n",