1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2004, 2006-2012 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by Ian Lance Taylor
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
31 #include "exceptions.h"
32 #include "gdb_string.h"
34 #include "gdb_usleep.h"
37 #include "mips-tdep.h"
38 #include "gdbthread.h"
41 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
42 types passed by breakpoint.c to target_insert_watchpoint.
43 Value 3 is our own invention, and is used for ordinary instruction
44 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
54 /* Prototypes for local functions. */
56 static int mips_readchar (int timeout
);
58 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
61 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
62 int *pch
, int timeout
);
64 static int mips_cksum (const unsigned char *hdr
,
65 const unsigned char *data
, int len
);
67 static void mips_send_packet (const char *s
, int get_ack
);
69 static void mips_send_command (const char *cmd
, int prompt
);
71 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
73 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
74 int *perr
, int timeout
, char *buff
);
76 static void mips_initialize (void);
78 static void mips_open (char *name
, int from_tty
);
80 static void pmon_open (char *name
, int from_tty
);
82 static void ddb_open (char *name
, int from_tty
);
84 static void lsi_open (char *name
, int from_tty
);
86 static void mips_close (int quitting
);
88 static void mips_detach (struct target_ops
*ops
, char *args
, int from_tty
);
90 static int mips_map_regno (struct gdbarch
*, int);
92 static void mips_set_register (int regno
, ULONGEST value
);
94 static void mips_prepare_to_store (struct regcache
*regcache
);
96 static int mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
);
98 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
101 static int mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
,
103 struct mem_attrib
*attrib
,
104 struct target_ops
*target
);
106 static void mips_files_info (struct target_ops
*ignore
);
108 static void mips_mourn_inferior (struct target_ops
*ops
);
110 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
);
112 static int pmon_zeroset (int recsize
, char **buff
, int *amount
,
113 unsigned int *chksum
);
115 static int pmon_checkset (int recsize
, char **buff
, int *value
);
117 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
118 int *inptr
, int inamount
, int *recsize
,
119 unsigned int *csum
, unsigned int *zerofill
);
121 static int pmon_check_ack (char *mesg
);
123 static void pmon_start_download (void);
125 static void pmon_end_download (int final
, int bintotal
);
127 static void pmon_download (char *buffer
, int length
);
129 static void pmon_load_fast (char *file
);
131 static void mips_load (char *file
, int from_tty
);
133 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
134 unsigned char *myaddr
, int len
);
136 static int mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
138 static int mips_clear_breakpoint (CORE_ADDR addr
, int len
,
139 enum break_type type
);
141 static int mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
,
142 enum break_type type
);
144 /* Forward declarations. */
145 extern struct target_ops mips_ops
;
146 extern struct target_ops pmon_ops
;
147 extern struct target_ops ddb_ops
;
148 extern struct target_ops rockhopper_ops
;
150 /* The MIPS remote debugging interface is built on top of a simple
151 packet protocol. Each packet is organized as follows:
153 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
154 may not appear anywhere else in the packet. Any time a SYN is
155 seen, a new packet should be assumed to have begun.
158 This byte contains the upper five bits of the logical length
159 of the data section, plus a single bit indicating whether this
160 is a data packet or an acknowledgement. The documentation
161 indicates that this bit is 1 for a data packet, but the actual
162 board uses 1 for an acknowledgement. The value of the byte is
163 0x40 + (ack ? 0x20 : 0) + (len >> 6)
164 (we always have 0 <= len < 1024). Acknowledgement packets do
165 not carry data, and must have a data length of 0.
167 LEN1 This byte contains the lower six bits of the logical length of
168 the data section. The value is
171 SEQ This byte contains the six bit sequence number of the packet.
174 An acknowlegment packet contains the sequence number of the
175 packet being acknowledged plus 1 modulo 64. Data packets are
176 transmitted in sequence. There may only be one outstanding
177 unacknowledged data packet at a time. The sequence numbers
178 are independent in each direction. If an acknowledgement for
179 the previous packet is received (i.e., an acknowledgement with
180 the sequence number of the packet just sent) the packet just
181 sent should be retransmitted. If no acknowledgement is
182 received within a timeout period, the packet should be
183 retransmitted. This has an unfortunate failure condition on a
184 high-latency line, as a delayed acknowledgement may lead to an
185 endless series of duplicate packets.
187 DATA The actual data bytes follow. The following characters are
188 escaped inline with DLE (ASCII 020, or ^P):
194 The additional DLE characters are not counted in the logical
195 length stored in the TYPE_LEN and LEN1 bytes.
200 These bytes contain an 18 bit checksum of the complete
201 contents of the packet excluding the SEQ byte and the
202 CSUM[123] bytes. The checksum is simply the twos complement
203 addition of all the bytes treated as unsigned characters. The
204 values of the checksum bytes are:
205 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
206 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
207 CSUM3: 0x40 + (cksum & 0x3f)
209 It happens that the MIPS remote debugging protocol always
210 communicates with ASCII strings. Because of this, this
211 implementation doesn't bother to handle the DLE quoting mechanism,
212 since it will never be required. */
216 /* The SYN character which starts each packet. */
219 /* The 0x40 used to offset each packet (this value ensures that all of
220 the header and trailer bytes, other than SYN, are printable ASCII
222 #define HDR_OFFSET 0x40
224 /* The indices of the bytes in the packet header. */
225 #define HDR_INDX_SYN 0
226 #define HDR_INDX_TYPE_LEN 1
227 #define HDR_INDX_LEN1 2
228 #define HDR_INDX_SEQ 3
231 /* The data/ack bit in the TYPE_LEN header byte. */
232 #define TYPE_LEN_DA_BIT 0x20
233 #define TYPE_LEN_DATA 0
234 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
236 /* How to compute the header bytes. */
237 #define HDR_SET_SYN(data, len, seq) (SYN)
238 #define HDR_SET_TYPE_LEN(data, len, seq) \
240 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
241 + (((len) >> 6) & 0x1f))
242 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
243 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
245 /* Check that a header byte is reasonable. */
246 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
248 /* Get data from the header. These macros evaluate their argument
250 #define HDR_IS_DATA(hdr) \
251 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
252 #define HDR_GET_LEN(hdr) \
253 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
254 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
256 /* The maximum data length. */
257 #define DATA_MAXLEN 1023
259 /* The trailer offset. */
260 #define TRLR_OFFSET HDR_OFFSET
262 /* The indices of the bytes in the packet trailer. */
263 #define TRLR_INDX_CSUM1 0
264 #define TRLR_INDX_CSUM2 1
265 #define TRLR_INDX_CSUM3 2
266 #define TRLR_LENGTH 3
268 /* How to compute the trailer bytes. */
269 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
270 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
271 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
273 /* Check that a trailer byte is reasonable. */
274 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
276 /* Get data from the trailer. This evaluates its argument multiple
278 #define TRLR_GET_CKSUM(trlr) \
279 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
280 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
281 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
283 /* The sequence number modulos. */
284 #define SEQ_MODULOS (64)
286 /* PMON commands to load from the serial port or UDP socket. */
287 #define LOAD_CMD "load -b -s tty0\r"
288 #define LOAD_CMD_UDP "load -b -s udp\r"
290 /* The target vectors for the four different remote MIPS targets.
291 These are initialized with code in _initialize_remote_mips instead
292 of static initializers, to make it easier to extend the target_ops
294 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, rockhopper_ops
, lsi_ops
;
296 enum mips_monitor_type
298 /* IDT/SIM monitor being used: */
300 /* PMON monitor being used: */
301 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET]
302 Algorithmics Ltd. Nov 9 1995 17:19:50 */
303 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET]
304 Risq Modular Systems,
305 Thu Jun 6 09:28:40 PDT 1996 */
306 MON_LSI
, /* 4.3.12 [EB,FP],
307 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
309 /* Last and unused value, for sizing vectors, etc. */
312 static enum mips_monitor_type mips_monitor
= MON_LAST
;
314 /* The monitor prompt text. If the user sets the PMON prompt
315 to some new value, the GDB `set monitor-prompt' command must also
316 be used to inform GDB about the expected prompt. Otherwise, GDB
317 will not be able to connect to PMON in mips_initialize().
318 If the `set monitor-prompt' command is not used, the expected
319 default prompt will be set according the target:
326 static char *mips_monitor_prompt
;
328 /* Set to 1 if the target is open. */
329 static int mips_is_open
;
331 /* Currently active target description (if mips_is_open == 1). */
332 static struct target_ops
*current_ops
;
334 /* Set to 1 while the connection is being initialized. */
335 static int mips_initializing
;
337 /* Set to 1 while the connection is being brought down. */
338 static int mips_exiting
;
340 /* The next sequence number to send. */
341 static unsigned int mips_send_seq
;
343 /* The next sequence number we expect to receive. */
344 static unsigned int mips_receive_seq
;
346 /* The time to wait before retransmitting a packet, in seconds. */
347 static int mips_retransmit_wait
= 3;
349 /* The number of times to try retransmitting a packet before giving up. */
350 static int mips_send_retries
= 10;
352 /* The number of garbage characters to accept when looking for an
353 SYN for the next packet. */
354 static int mips_syn_garbage
= 10;
356 /* The time to wait for a packet, in seconds. */
357 static int mips_receive_wait
= 5;
359 /* Set if we have sent a packet to the board but have not yet received
361 static int mips_need_reply
= 0;
363 /* Handle used to access serial I/O stream. */
364 static struct serial
*mips_desc
;
366 /* UDP handle used to download files to target. */
367 static struct serial
*udp_desc
;
368 static int udp_in_use
;
370 /* TFTP filename used to download files to DDB board, in the form
372 static char *tftp_name
; /* host:filename */
373 static char *tftp_localname
; /* filename portion of above */
374 static int tftp_in_use
;
375 static FILE *tftp_file
;
377 /* Counts the number of times the user tried to interrupt the target (usually
379 static int interrupt_count
;
381 /* If non-zero, means that the target is running. */
382 static int mips_wait_flag
= 0;
384 /* If non-zero, monitor supports breakpoint commands. */
385 static int monitor_supports_breakpoints
= 0;
387 /* Data cache header. */
389 #if 0 /* not used (yet?) */
390 static DCACHE
*mips_dcache
;
393 /* Non-zero means that we've just hit a read or write watchpoint. */
394 static int hit_watchpoint
;
396 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
397 The table is indexed by a breakpoint number, which is an integer
398 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
400 #define MAX_LSI_BREAKPOINTS 256
401 struct lsi_breakpoint_info
403 enum break_type type
; /* type of breakpoint */
404 CORE_ADDR addr
; /* address of breakpoint */
405 int len
; /* length of region being watched */
406 unsigned long value
; /* value to watch */
408 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
410 /* Error/warning codes returned by LSI PMON for breakpoint commands.
411 Warning values may be ORed together; error values may not. */
412 #define W_WARN 0x100 /* This bit is set if the error code
414 #define W_MSK 0x101 /* warning: Range feature is supported
416 #define W_VAL 0x102 /* warning: Value check is not
417 supported in hardware */
418 #define W_QAL 0x104 /* warning: Requested qualifiers are
419 not supported in hardware */
421 #define E_ERR 0x200 /* This bit is set if the error code
423 #define E_BPT 0x200 /* error: No such breakpoint number */
424 #define E_RGE 0x201 /* error: Range is not supported */
425 #define E_QAL 0x202 /* error: The requested qualifiers can
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
;
458 /* This is the ptid we use while we're connected to the remote. Its
459 value is arbitrary, as the remote-mips target doesn't have a notion of
460 processes or threads, but we need something non-null to place in
462 static ptid_t remote_mips_ptid
;
464 /* Close any ports which might be open. Reset certain globals indicating
465 the state of those ports. */
471 serial_close (mips_desc
);
475 serial_close (udp_desc
);
481 /* Handle low-level error that we can't recover from. Note that just
482 error()ing out from target_wait or some such low-level place will cause
483 all hell to break loose--the rest of GDB will tend to get left in an
484 inconsistent state. */
486 static void ATTRIBUTE_NORETURN
487 mips_error (char *string
,...)
491 va_start (args
, string
);
493 target_terminal_ours ();
494 wrap_here (""); /* Force out any buffered output. */
495 gdb_flush (gdb_stdout
);
497 fputs_filtered (error_pre_print
, gdb_stderr
);
498 vfprintf_filtered (gdb_stderr
, string
, args
);
499 fprintf_filtered (gdb_stderr
, "\n");
501 gdb_flush (gdb_stderr
);
503 /* Clean up in such a way that mips_close won't try to talk to the
504 board (it almost surely won't work since we weren't able to talk to
508 printf_unfiltered ("Ending remote MIPS debugging.\n");
509 if (!ptid_equal (inferior_ptid
, null_ptid
))
510 target_mourn_inferior ();
512 deprecated_throw_reason (RETURN_ERROR
);
515 /* putc_readable - print a character, displaying non-printable chars in
516 ^x notation or in hex. */
519 fputc_readable (int ch
, struct ui_file
*file
)
522 fputc_unfiltered ('\n', file
);
524 fprintf_unfiltered (file
, "\\r");
525 else if (ch
< 0x20) /* ASCII control character */
526 fprintf_unfiltered (file
, "^%c", ch
+ '@');
527 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
528 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
530 fputc_unfiltered (ch
, file
);
534 /* puts_readable - print a string, displaying non-printable chars in
535 ^x notation or in hex. */
538 fputs_readable (const char *string
, struct ui_file
*file
)
542 while ((c
= *string
++) != '\0')
543 fputc_readable (c
, file
);
547 /* Read P as a hex value. Return true if every character made sense,
548 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
551 read_hex_value (const char *p
, ULONGEST
*result
)
559 if (*p
>= '0' && *p
<= '9')
561 else if (*p
>= 'A' && *p
<= 'F')
562 retval
|= *p
- 'A' + 10;
563 else if (*p
>= 'a' && *p
<= 'f')
564 retval
|= *p
- 'a' + 10;
574 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
575 timed out. TIMEOUT specifies timeout value in seconds. */
578 mips_expect_timeout (const char *string
, int timeout
)
580 const char *p
= string
;
584 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
585 fputs_readable (string
, gdb_stdlog
);
586 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
594 /* Must use serial_readchar() here cuz mips_readchar would get
595 confused if we were waiting for the mips_monitor_prompt... */
597 c
= serial_readchar (mips_desc
, timeout
);
599 if (c
== SERIAL_TIMEOUT
)
602 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
607 fputc_readable (c
, gdb_stdlog
);
615 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
628 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
629 timed out. The timeout value is hard-coded to 2 seconds. Use
630 mips_expect_timeout if a different timeout value is needed. */
633 mips_expect (const char *string
)
635 return mips_expect_timeout (string
, remote_timeout
);
638 /* Read a character from the remote, aborting on error. Returns
639 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
640 returns). FIXME: If we see the string mips_monitor_prompt from the
641 board, then we are debugging on the main console port, and we have
642 somehow dropped out of remote debugging mode. In this case, we
643 automatically go back in to remote debugging mode. This is a hack,
644 put in because I can't find any way for a program running on the
645 remote board to terminate without also ending remote debugging
646 mode. I assume users won't have any trouble with this; for one
647 thing, the IDT documentation generally assumes that the remote
648 debugging port is not the console port. This is, however, very
649 convenient for DejaGnu when you only have one connected serial
653 mips_readchar (int timeout
)
656 static int state
= 0;
657 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
659 { /* FIXME this whole block is dead code! */
663 if (i
== -1 && watchdog
> 0)
667 if (state
== mips_monitor_prompt_len
)
669 ch
= serial_readchar (mips_desc
, timeout
);
671 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off. */
673 target_mourn_inferior ();
674 error (_("Watchdog has expired. Target detached."));
677 if (ch
== SERIAL_EOF
)
678 mips_error (_("End of file from remote"));
679 if (ch
== SERIAL_ERROR
)
680 mips_error (_("Error reading from remote: %s"), safe_strerror (errno
));
681 if (remote_debug
> 1)
683 /* Don't use _filtered; we can't deal with a QUIT out of
684 target_wait, and I think this might be called from there. */
685 if (ch
!= SERIAL_TIMEOUT
)
686 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
688 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
691 /* If we have seen mips_monitor_prompt and we either time out, or
692 we see a @ (which was echoed from a packet we sent), reset the
693 board as described above. The first character in a packet after
694 the SYN (which is not echoed) is always an @ unless the packet is
695 more than 64 characters long, which ours never are. */
696 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
697 && state
== mips_monitor_prompt_len
698 && !mips_initializing
701 if (remote_debug
> 0)
702 /* Don't use _filtered; we can't deal with a QUIT out of
703 target_wait, and I think this might be called from there. */
704 fprintf_unfiltered (gdb_stdlog
,
705 "Reinitializing MIPS debugging mode\n");
712 /* At this point, about the only thing we can do is abort the command
713 in progress and get back to command level as quickly as possible. */
715 error (_("Remote board reset, debug protocol re-initialized."));
718 if (ch
== mips_monitor_prompt
[state
])
726 /* Get a packet header, putting the data in the supplied buffer.
727 PGARBAGE is a pointer to the number of garbage characters received
728 so far. CH is the last character received. Returns 0 for success,
729 or -1 for timeout. */
732 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
738 /* Wait for a SYN. mips_syn_garbage is intended to prevent
739 sitting here indefinitely if the board sends us one garbage
740 character per second. ch may already have a value from the
741 last time through the loop. */
744 ch
= mips_readchar (timeout
);
745 if (ch
== SERIAL_TIMEOUT
)
749 /* Printing the character here lets the user of gdb see
750 what the program is outputting, if the debugging is
751 being done on the console port. Don't use _filtered:
752 we can't deal with a QUIT out of target_wait and
753 buffered target output confuses the user. */
754 if (!mips_initializing
|| remote_debug
> 0)
756 if (isprint (ch
) || isspace (ch
))
758 fputc_unfiltered (ch
, gdb_stdtarg
);
762 fputc_readable (ch
, gdb_stdtarg
);
764 gdb_flush (gdb_stdtarg
);
767 /* Only count unprintable characters. */
768 if (! (isprint (ch
) || isspace (ch
)))
771 if (mips_syn_garbage
> 0
772 && *pgarbage
> mips_syn_garbage
)
773 mips_error (_("Debug protocol failure: more "
774 "than %d characters before a sync."),
779 /* Get the packet header following the SYN. */
780 for (i
= 1; i
< HDR_LENGTH
; i
++)
782 ch
= mips_readchar (timeout
);
783 if (ch
== SERIAL_TIMEOUT
)
785 /* Make sure this is a header byte. */
786 if (ch
== SYN
|| !HDR_CHECK (ch
))
792 /* If we got the complete header, we can return. Otherwise we
793 loop around and keep looking for SYN. */
799 /* Get a packet header, putting the data in the supplied buffer.
800 PGARBAGE is a pointer to the number of garbage characters received
801 so far. The last character read is returned in *PCH. Returns 0
802 for success, -1 for timeout, -2 for error. */
805 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
806 int *pch
, int timeout
)
811 for (i
= 0; i
< TRLR_LENGTH
; i
++)
813 ch
= mips_readchar (timeout
);
815 if (ch
== SERIAL_TIMEOUT
)
817 if (!TRLR_CHECK (ch
))
824 /* Get the checksum of a packet. HDR points to the packet header.
825 DATA points to the packet data. LEN is the length of DATA. */
828 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
830 const unsigned char *p
;
836 /* The initial SYN is not included in the checksum. */
850 /* Send a packet containing the given ASCII string. */
853 mips_send_packet (const char *s
, int get_ack
)
855 /* unsigned */ int len
;
856 unsigned char *packet
;
861 if (len
> DATA_MAXLEN
)
862 mips_error (_("MIPS protocol data packet too long: %s"), s
);
864 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
866 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
867 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
868 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
869 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
871 memcpy (packet
+ HDR_LENGTH
, s
, len
);
873 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
874 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
875 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
876 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
878 /* Increment the sequence number. This will set mips_send_seq to
879 the sequence number we expect in the acknowledgement. */
880 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
882 /* We can only have one outstanding data packet, so we just wait for
883 the acknowledgement here. Keep retransmitting the packet until
884 we get one, or until we've tried too many times. */
885 for (try = 0; try < mips_send_retries
; try++)
890 if (remote_debug
> 0)
892 /* Don't use _filtered; we can't deal with a QUIT out of
893 target_wait, and I think this might be called from there. */
894 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
895 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
898 if (serial_write (mips_desc
, packet
,
899 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
900 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
909 unsigned char hdr
[HDR_LENGTH
+ 1];
910 unsigned char trlr
[TRLR_LENGTH
+ 1];
914 /* Get the packet header. If we time out, resend the data
916 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
922 /* If we get a data packet, assume it is a duplicate and
923 ignore it. FIXME: If the acknowledgement is lost, this
924 data packet may be the packet the remote sends after the
926 if (HDR_IS_DATA (hdr
))
930 /* Ignore any errors raised whilst attempting to ignore
933 len
= HDR_GET_LEN (hdr
);
935 for (i
= 0; i
< len
; i
++)
939 rch
= mips_readchar (remote_timeout
);
945 if (rch
== SERIAL_TIMEOUT
)
947 /* Ignore the character. */
951 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
954 /* We don't bother checking the checksum, or providing an
955 ACK to the packet. */
959 /* If the length is not 0, this is a garbled packet. */
960 if (HDR_GET_LEN (hdr
) != 0)
963 /* Get the packet trailer. */
964 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
965 mips_retransmit_wait
);
967 /* If we timed out, resend the data packet. */
971 /* If we got a bad character, reread the header. */
975 /* If the checksum does not match the trailer checksum, this
976 is a bad packet; ignore it. */
977 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
978 != TRLR_GET_CKSUM (trlr
))
981 if (remote_debug
> 0)
983 hdr
[HDR_LENGTH
] = '\0';
984 trlr
[TRLR_LENGTH
] = '\0';
985 /* Don't use _filtered; we can't deal with a QUIT out of
986 target_wait, and I think this might be called from there. */
987 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
988 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
991 /* If this ack is for the current packet, we're done. */
992 seq
= HDR_GET_SEQ (hdr
);
993 if (seq
== mips_send_seq
)
996 /* If this ack is for the last packet, resend the current
998 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1001 /* Otherwise this is a bad ack; ignore it. Increment the
1002 garbage count to ensure that we do not stay in this loop
1008 mips_error (_("Remote did not acknowledge packet"));
1011 /* Receive and acknowledge a packet, returning the data in BUFF (which
1012 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1013 implies that only the sender retransmits packets, so this code just
1014 waits silently for a packet. It returns the length of the received
1015 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1016 don't print an error message and return -1. */
1019 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1024 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1031 unsigned char hdr
[HDR_LENGTH
];
1032 unsigned char trlr
[TRLR_LENGTH
];
1036 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1039 mips_error (_("Timed out waiting for remote packet"));
1046 /* An acknowledgement is probably a duplicate; ignore it. */
1047 if (!HDR_IS_DATA (hdr
))
1049 len
= HDR_GET_LEN (hdr
);
1050 /* Check if the length is valid for an ACK, we may aswell
1051 try and read the remainder of the packet: */
1054 /* Ignore the error condition, since we are going to
1055 ignore the packet anyway. */
1056 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1058 /* Don't use _filtered; we can't deal with a QUIT out of
1059 target_wait, and I think this might be called from there. */
1060 if (remote_debug
> 0)
1061 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1065 len
= HDR_GET_LEN (hdr
);
1066 for (i
= 0; i
< len
; i
++)
1070 rch
= mips_readchar (timeout
);
1076 if (rch
== SERIAL_TIMEOUT
)
1079 mips_error (_("Timed out waiting for remote packet"));
1088 /* Don't use _filtered; we can't deal with a QUIT out of
1089 target_wait, and I think this might be called from there. */
1090 if (remote_debug
> 0)
1091 fprintf_unfiltered (gdb_stdlog
,
1092 "Got new SYN after %d chars (wanted %d)\n",
1097 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1101 mips_error (_("Timed out waiting for packet"));
1107 /* Don't use _filtered; we can't deal with a QUIT out of
1108 target_wait, and I think this might be called from there. */
1109 if (remote_debug
> 0)
1110 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1114 /* If this is the wrong sequence number, ignore it. */
1115 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1117 /* Don't use _filtered; we can't deal with a QUIT out of
1118 target_wait, and I think this might be called from there. */
1119 if (remote_debug
> 0)
1120 fprintf_unfiltered (gdb_stdlog
,
1121 "Ignoring sequence number %d (want %d)\n",
1122 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1126 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1129 if (remote_debug
> 0)
1130 /* Don't use _filtered; we can't deal with a QUIT out of
1131 target_wait, and I think this might be called from there. */
1132 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1133 mips_cksum (hdr
, buff
, len
),
1134 TRLR_GET_CKSUM (trlr
));
1136 /* The checksum failed. Send an acknowledgement for the
1137 previous packet to tell the remote to resend the packet. */
1138 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1139 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1140 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1141 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1143 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1145 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1146 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1147 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1149 if (remote_debug
> 0)
1151 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1152 /* Don't use _filtered; we can't deal with a QUIT out of
1153 target_wait, and I think this might be called from there. */
1154 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1158 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1161 mips_error (_("write to target failed: %s"),
1162 safe_strerror (errno
));
1168 if (remote_debug
> 0)
1171 /* Don't use _filtered; we can't deal with a QUIT out of
1172 target_wait, and I think this might be called from there. */
1173 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1176 /* We got the packet. Send an acknowledgement. */
1177 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1179 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1180 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1181 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1182 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1184 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1186 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1187 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1188 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1190 if (remote_debug
> 0)
1192 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1193 /* Don't use _filtered; we can't deal with a QUIT out of
1194 target_wait, and I think this might be called from there. */
1195 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1199 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1202 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
1210 /* Optionally send a request to the remote system and optionally wait
1211 for the reply. This implements the remote debugging protocol,
1212 which is built on top of the packet protocol defined above. Each
1213 request has an ADDR argument and a DATA argument. The following
1214 requests are defined:
1216 \0 don't send a request; just wait for a reply
1217 i read word from instruction space at ADDR
1218 d read word from data space at ADDR
1219 I write DATA to instruction space at ADDR
1220 D write DATA to data space at ADDR
1221 r read register number ADDR
1222 R set register number ADDR to value DATA
1223 c continue execution (if ADDR != 1, set pc to ADDR)
1224 s single step (if ADDR != 1, set pc to ADDR)
1226 The read requests return the value requested. The write requests
1227 return the previous value in the changed location. The execution
1228 requests return a UNIX wait value (the approximate signal which
1229 caused execution to stop is in the upper eight bits).
1231 If PERR is not NULL, this function waits for a reply. If an error
1232 occurs, it sets *PERR to 1 and sets errno according to what the
1233 target board reports. */
1236 mips_request (int cmd
,
1243 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
1244 char myBuff
[DATA_MAXLEN
+ 1];
1245 char response_string
[17];
1252 if (buff
== (char *) NULL
)
1257 if (mips_need_reply
)
1258 internal_error (__FILE__
, __LINE__
,
1259 _("mips_request: Trying to send "
1260 "command before reply"));
1261 /* 'T' sets a register to a 64-bit value, so make sure we use
1262 the right conversion function. */
1264 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1265 phex_nz (addr
, addr_size
), phex_nz (data
, 8));
1267 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1268 phex_nz (addr
, addr_size
), phex_nz (data
, addr_size
));
1270 mips_send_packet (buff
, 1);
1271 mips_need_reply
= 1;
1274 if (perr
== (int *) NULL
)
1277 if (!mips_need_reply
)
1278 internal_error (__FILE__
, __LINE__
,
1279 _("mips_request: Trying to get reply before command"));
1281 mips_need_reply
= 0;
1283 len
= mips_receive_packet (buff
, 1, timeout
);
1286 if (sscanf (buff
, "0x%x %c 0x%x 0x%16s",
1287 &rpid
, &rcmd
, &rerrflg
, response_string
) != 4
1288 || !read_hex_value (response_string
, &rresponse
)
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. */
1309 /* Cleanup associated with mips_initialize(). */
1312 mips_initialize_cleanups (void *arg
)
1314 mips_initializing
= 0;
1317 /* Cleanup associated with mips_exit_debug(). */
1320 mips_exit_cleanups (void *arg
)
1325 /* Send a command and wait for that command to be echoed back. Wait,
1326 too, for the following prompt. */
1329 mips_send_command (const char *cmd
, int prompt
)
1331 serial_write (mips_desc
, cmd
, strlen (cmd
));
1335 mips_expect (mips_monitor_prompt
);
1338 /* Enter remote (dbx) debug mode: */
1341 mips_enter_debug (void)
1343 /* Reset the sequence numbers, ready for the new debug sequence: */
1345 mips_receive_seq
= 0;
1347 if (mips_monitor
!= MON_IDT
)
1348 mips_send_command ("debug\r", 0);
1349 else /* Assume IDT monitor by default. */
1350 mips_send_command ("db tty0\r", 0);
1352 gdb_usleep (1000000);
1353 serial_write (mips_desc
, "\r", sizeof "\r" - 1);
1355 /* We don't need to absorb any spurious characters here, since the
1356 mips_receive_header will eat up a reasonable number of characters
1357 whilst looking for the SYN, however this avoids the "garbage"
1358 being displayed to the user. */
1359 if (mips_monitor
!= MON_IDT
)
1363 char buff
[DATA_MAXLEN
+ 1];
1365 if (mips_receive_packet (buff
, 1, 3) < 0)
1366 mips_error (_("Failed to initialize (didn't receive packet)."));
1370 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1373 mips_exit_debug (void)
1376 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1380 if (mips_monitor
!= MON_IDT
&& mips_monitor
!= MON_ROCKHOPPER
)
1382 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1383 so we do not get a reply to this command: */
1384 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1385 mips_need_reply
= 0;
1386 if (!mips_expect (" break!"))
1390 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1392 if (!mips_expect (mips_monitor_prompt
))
1395 do_cleanups (old_cleanups
);
1400 /* Initialize a new connection to the MIPS board, and make sure we are
1401 really connected. */
1404 mips_initialize (void)
1407 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1410 /* What is this code doing here? I don't see any way it can happen, and
1411 it might mean mips_initializing didn't get cleared properly.
1412 So I'll make it a warning. */
1414 if (mips_initializing
)
1416 warning (_("internal error: mips_initialize called twice"));
1421 mips_initializing
= 1;
1423 /* At this point, the packit protocol isn't responding. We'll try getting
1424 into the monitor, and restarting the protocol. */
1426 /* Force the system into the monitor. After this we *should* be at
1427 the mips_monitor_prompt. */
1428 if (mips_monitor
!= MON_IDT
)
1429 j
= 0; /* Start by checking if we are already
1432 j
= 1; /* Start by sending a break. */
1437 case 0: /* First, try sending a CR. */
1438 serial_flush_input (mips_desc
);
1439 serial_write (mips_desc
, "\r", 1);
1441 case 1: /* First, try sending a break. */
1442 serial_send_break (mips_desc
);
1444 case 2: /* Then, try a ^C. */
1445 serial_write (mips_desc
, "\003", 1);
1447 case 3: /* Then, try escaping from download. */
1449 if (mips_monitor
!= MON_IDT
)
1453 /* We shouldn't need to send multiple termination
1454 sequences, since the target performs line (or
1455 block) reads, and then processes those
1456 packets. In-case we were downloading a large packet
1457 we flush the output buffer before inserting a
1458 termination sequence. */
1459 serial_flush_output (mips_desc
);
1460 sprintf (tbuff
, "\r/E/E\r");
1461 serial_write (mips_desc
, tbuff
, 6);
1468 /* We are possibly in binary download mode, having
1469 aborted in the middle of an S-record. ^C won't
1470 work because of binary mode. The only reliable way
1471 out is to send enough termination packets (8 bytes)
1472 to fill up and then overflow the largest size
1473 S-record (255 bytes in this case). This amounts to
1474 256/8 + 1 packets. */
1476 mips_make_srec (srec
, '7', 0, NULL
, 0);
1478 for (i
= 1; i
<= 33; i
++)
1480 serial_write (mips_desc
, srec
, 8);
1482 if (serial_readchar (mips_desc
, 0) >= 0)
1483 break; /* Break immediatly if we get something from
1490 mips_error (_("Failed to initialize."));
1493 if (mips_expect (mips_monitor_prompt
))
1497 if (mips_monitor
!= MON_IDT
)
1499 /* Sometimes PMON ignores the first few characters in the first
1500 command sent after a load. Sending a blank command gets
1502 mips_send_command ("\r", -1);
1504 /* Ensure the correct target state: */
1505 if (mips_monitor
!= MON_LSI
)
1506 mips_send_command ("set regsize 64\r", -1);
1507 mips_send_command ("set hostport tty0\r", -1);
1508 mips_send_command ("set brkcmd \"\"\r", -1);
1509 /* Delete all the current breakpoints: */
1510 mips_send_command ("db *\r", -1);
1511 /* NOTE: PMON does not have breakpoint support through the
1512 "debug" mode, only at the monitor command-line. */
1515 mips_enter_debug ();
1517 /* Clear all breakpoints: */
1518 if ((mips_monitor
== MON_IDT
1519 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1520 || mips_monitor
== MON_LSI
)
1521 monitor_supports_breakpoints
= 1;
1523 monitor_supports_breakpoints
= 0;
1525 do_cleanups (old_cleanups
);
1527 /* If this doesn't call error, we have connected; we don't care if
1528 the request itself succeeds or fails. */
1530 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1533 /* Open a connection to the remote board. */
1536 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1537 enum mips_monitor_type new_monitor
,
1538 const char *new_monitor_prompt
)
1541 char *serial_port_name
;
1542 char *remote_name
= 0;
1543 char *local_name
= 0;
1548 To open a MIPS remote debugging connection, you need to specify what\n\
1549 serial device is attached to the target board (e.g., /dev/ttya).\n\
1550 If you want to use TFTP to download to the board, specify the name of a\n\
1551 temporary file to be used by GDB for downloads as the second argument.\n\
1552 This filename must be in the form host:filename, where host is the name\n\
1553 of the host running the TFTP server, and the file must be readable by the\n\
1554 world. If the local name of the temporary file differs from the name as\n\
1555 seen from the board via TFTP, specify that name as the third parameter.\n"));
1557 /* Parse the serial port name, the optional TFTP name, and the
1558 optional local TFTP name. */
1559 argv
= gdb_buildargv (name
);
1560 make_cleanup_freeargv (argv
);
1562 serial_port_name
= xstrdup (argv
[0]);
1563 if (argv
[1]) /* Remote TFTP name specified? */
1565 remote_name
= argv
[1];
1566 if (argv
[2]) /* Local TFTP filename specified? */
1567 local_name
= argv
[2];
1570 target_preopen (from_tty
);
1573 unpush_target (current_ops
);
1575 /* Open and initialize the serial port. */
1576 mips_desc
= serial_open (serial_port_name
);
1577 if (mips_desc
== NULL
)
1578 perror_with_name (serial_port_name
);
1580 if (baud_rate
!= -1)
1582 if (serial_setbaudrate (mips_desc
, baud_rate
))
1584 serial_close (mips_desc
);
1585 perror_with_name (serial_port_name
);
1589 serial_raw (mips_desc
);
1591 /* Open and initialize the optional download port. If it is in the form
1592 hostname#portnumber, it's a UDP socket. If it is in the form
1593 hostname:filename, assume it's the TFTP filename that must be
1594 passed to the DDB board to tell it where to get the load file. */
1597 if (strchr (remote_name
, '#'))
1599 udp_desc
= serial_open (remote_name
);
1601 perror_with_name (_("Unable to open UDP port"));
1606 /* Save the remote and local names of the TFTP temp file. If
1607 the user didn't specify a local name, assume it's the same
1608 as the part of the remote name after the "host:". */
1612 xfree (tftp_localname
);
1613 if (local_name
== NULL
)
1614 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1615 local_name
++; /* Skip over the colon. */
1616 if (local_name
== NULL
)
1617 local_name
= remote_name
; /* Local name same as remote name. */
1618 tftp_name
= xstrdup (remote_name
);
1619 tftp_localname
= xstrdup (local_name
);
1627 /* Reset the expected monitor prompt if it's never been set before. */
1628 if (mips_monitor_prompt
== NULL
)
1629 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1630 mips_monitor
= new_monitor
;
1635 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1637 /* Switch to using remote target now. */
1640 inferior_ptid
= remote_mips_ptid
;
1641 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid
));
1642 add_thread_silent (inferior_ptid
);
1644 /* Try to figure out the processor model if possible. */
1645 deprecated_mips_set_processor_regs_hack ();
1647 /* This is really the job of start_remote however, that makes an
1648 assumption that the target is about to print out a status message
1649 of some sort. That doesn't happen here (in fact, it may not be
1650 possible to get the monitor to send the appropriate packet). */
1652 reinit_frame_cache ();
1653 registers_changed ();
1654 stop_pc
= regcache_read_pc (get_current_regcache ());
1655 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
);
1656 xfree (serial_port_name
);
1659 /* Open a connection to an IDT board. */
1662 mips_open (char *name
, int from_tty
)
1664 const char *monitor_prompt
= NULL
;
1665 if (gdbarch_bfd_arch_info (target_gdbarch
) != NULL
1666 && gdbarch_bfd_arch_info (target_gdbarch
)->arch
== bfd_arch_mips
)
1668 switch (gdbarch_bfd_arch_info (target_gdbarch
)->mach
)
1670 case bfd_mach_mips4100
:
1671 case bfd_mach_mips4300
:
1672 case bfd_mach_mips4600
:
1673 case bfd_mach_mips4650
:
1674 case bfd_mach_mips5000
:
1675 monitor_prompt
= "<RISQ> ";
1679 if (monitor_prompt
== NULL
)
1680 monitor_prompt
= "<IDT>";
1681 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1684 /* Open a connection to a PMON board. */
1687 pmon_open (char *name
, int from_tty
)
1689 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1692 /* Open a connection to a DDB board. */
1695 ddb_open (char *name
, int from_tty
)
1697 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1700 /* Open a connection to a rockhopper board. */
1703 rockhopper_open (char *name
, int from_tty
)
1705 common_open (&rockhopper_ops
, name
, from_tty
, MON_ROCKHOPPER
, "NEC01>");
1708 /* Open a connection to an LSI board. */
1711 lsi_open (char *name
, int from_tty
)
1715 /* Clear the LSI breakpoint table. */
1716 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1717 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1719 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1722 /* Close a connection to the remote board. */
1725 mips_close (int quitting
)
1729 /* Get the board out of remote debugging mode. */
1730 (void) mips_exit_debug ();
1735 generic_mourn_inferior ();
1738 /* Detach from the remote board. */
1741 mips_detach (struct target_ops
*ops
, char *args
, int from_tty
)
1744 error (_("Argument given to \"detach\" when remotely debugging."));
1751 printf_unfiltered ("Ending remote MIPS debugging.\n");
1754 /* Tell the target board to resume. This does not wait for a reply
1755 from the board, except in the case of single-stepping on LSI boards,
1756 where PMON does return a reply. */
1759 mips_resume (struct target_ops
*ops
,
1760 ptid_t ptid
, int step
, enum target_signal siggnal
)
1764 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1765 a single step, so we wait for that. */
1766 mips_request (step
? 's' : 'c', 1, siggnal
,
1767 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1768 mips_receive_wait
, NULL
);
1771 /* Return the signal corresponding to SIG, where SIG is the number which
1772 the MIPS protocol uses for the signal. */
1774 static enum target_signal
1775 mips_signal_from_protocol (int sig
)
1777 /* We allow a few more signals than the IDT board actually returns, on
1778 the theory that there is at least *some* hope that perhaps the numbering
1779 for these signals is widely agreed upon. */
1782 return TARGET_SIGNAL_UNKNOWN
;
1784 /* Don't want to use target_signal_from_host because we are converting
1785 from MIPS signal numbers, not host ones. Our internal numbers
1786 match the MIPS numbers for the signals the board can return, which
1787 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1788 return (enum target_signal
) sig
;
1791 /* Set the register designated by REGNO to the value designated by VALUE. */
1794 mips_set_register (int regno
, ULONGEST value
)
1796 char buf
[MAX_REGISTER_SIZE
];
1797 struct regcache
*regcache
= get_current_regcache ();
1798 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1799 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1801 /* We got the number the register holds, but gdb expects to see a
1802 value in the target byte ordering. */
1804 if (mips_monitor
!= MON_ROCKHOPPER
1805 && (regno
== mips_regnum (gdbarch
)->pc
|| regno
< 32))
1806 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1807 In such cases we can only really debug 32-bit code properly so,
1808 when reading a GPR or the PC, assume that the full 64-bit
1809 value is the sign extension of the lower 32 bits. */
1810 store_signed_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1813 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1816 regcache_raw_supply (regcache
, regno
, buf
);
1819 /* Wait until the remote stops, and return a wait status. */
1822 mips_wait (struct target_ops
*ops
,
1823 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1827 char buff
[DATA_MAXLEN
];
1828 ULONGEST rpc
, rfp
, rsp
;
1829 char pc_string
[17], fp_string
[17], sp_string
[17], flags
[20];
1833 interrupt_count
= 0;
1836 /* If we have not sent a single step or continue command, then the
1837 board is waiting for us to do something. Return a status
1838 indicating that it is stopped. */
1839 if (!mips_need_reply
)
1841 status
->kind
= TARGET_WAITKIND_STOPPED
;
1842 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1843 return inferior_ptid
;
1846 /* No timeout; we sit here as long as the program continues to execute. */
1848 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1851 mips_error (_("Remote failure: %s"), safe_strerror (errno
));
1853 /* On returning from a continue, the PMON monitor seems to start
1854 echoing back the messages we send prior to sending back the
1855 ACK. The code can cope with this, but to try and avoid the
1856 unnecessary serial traffic, and "spurious" characters displayed
1857 to the user, we cheat and reset the debug protocol. The problems
1858 seems to be caused by a check on the number of arguments, and the
1859 command length, within the monitor causing it to echo the command
1861 if (mips_monitor
== MON_PMON
)
1864 mips_enter_debug ();
1867 /* See if we got back extended status. If so, pick out the pc, fp,
1870 nfields
= sscanf (buff
,
1871 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1872 pc_string
, fp_string
, sp_string
, flags
);
1874 && read_hex_value (pc_string
, &rpc
)
1875 && read_hex_value (fp_string
, &rfp
)
1876 && read_hex_value (sp_string
, &rsp
))
1878 struct regcache
*regcache
= get_current_regcache ();
1879 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1881 mips_set_register (gdbarch_pc_regnum (gdbarch
), rpc
);
1882 mips_set_register (30, rfp
);
1883 mips_set_register (gdbarch_sp_regnum (gdbarch
), rsp
);
1889 for (i
= 0; i
<= 2; i
++)
1890 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1892 else if (flags
[i
] == '\000')
1897 if (strcmp (target_shortname
, "lsi") == 0)
1900 /* If this is an LSI PMON target, see if we just hit a
1901 hardrdware watchpoint. Right now, PMON doesn't give us
1902 enough information to determine which breakpoint we hit. So
1903 we have to look up the PC in our own table of breakpoints,
1904 and if found, assume it's just a normal instruction fetch
1905 breakpoint, not a data watchpoint. FIXME when PMON provides
1906 some way to tell us what type of breakpoint it is. */
1908 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1911 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1913 if (lsi_breakpoints
[i
].addr
== pc
1914 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1921 /* If a data breakpoint was hit, PMON returns the following packet:
1923 The return packet from an ordinary breakpoint doesn't have the
1924 extra 0x01 field tacked onto the end. */
1925 if (nfields
== 1 && rpc
== 1)
1930 /* NOTE: The following (sig) numbers are defined by PMON:
1931 SPP_SIGTRAP 5 breakpoint
1939 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1940 and so on, because the constants we want here are determined by the
1941 MIPS protocol and have nothing to do with what host we are running on. */
1942 if ((rstatus
& 0xff) == 0)
1944 status
->kind
= TARGET_WAITKIND_EXITED
;
1945 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1947 else if ((rstatus
& 0xff) == 0x7f)
1949 status
->kind
= TARGET_WAITKIND_STOPPED
;
1950 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1952 /* If the stop PC is in the _exit function, assume
1953 we hit the 'break 0x3ff' instruction in _exit, so this
1954 is not a normal breakpoint. */
1955 if (strcmp (target_shortname
, "lsi") == 0)
1958 CORE_ADDR func_start
;
1959 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1961 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1962 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1963 && func_start
== pc
)
1964 status
->kind
= TARGET_WAITKIND_EXITED
;
1969 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1970 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1973 return inferior_ptid
;
1976 /* We have to map between the register numbers used by gdb and the
1977 register numbers used by the debugging protocol. */
1979 #define REGNO_OFFSET 96
1982 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1986 if (regno
>= mips_regnum (gdbarch
)->fp0
1987 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1988 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1989 else if (regno
== mips_regnum (gdbarch
)->pc
)
1990 return REGNO_OFFSET
+ 0;
1991 else if (regno
== mips_regnum (gdbarch
)->cause
)
1992 return REGNO_OFFSET
+ 1;
1993 else if (regno
== mips_regnum (gdbarch
)->hi
)
1994 return REGNO_OFFSET
+ 2;
1995 else if (regno
== mips_regnum (gdbarch
)->lo
)
1996 return REGNO_OFFSET
+ 3;
1997 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
1998 return REGNO_OFFSET
+ 4;
1999 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
2000 return REGNO_OFFSET
+ 5;
2002 /* FIXME: Is there a way to get the status register? */
2006 /* Fetch the remote registers. */
2009 mips_fetch_registers (struct target_ops
*ops
,
2010 struct regcache
*regcache
, int regno
)
2012 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2013 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2019 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2020 mips_fetch_registers (ops
, regcache
, regno
);
2024 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
2025 || regno
== MIPS_ZERO_REGNUM
)
2026 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2027 supposed to read zero (see also mips-nat.c). */
2031 /* If PMON doesn't support this register, don't waste serial
2032 bandwidth trying to read it. */
2033 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
2035 if (regno
!= 0 && pmon_reg
== 0)
2039 /* Unfortunately the PMON version in the Vr4300 board has been
2040 compiled without the 64bit register access commands. This
2041 means we cannot get hold of the full register width. */
2042 if (mips_monitor
== MON_DDB
|| mips_monitor
== MON_ROCKHOPPER
)
2043 val
= mips_request ('t', pmon_reg
, 0,
2044 &err
, mips_receive_wait
, NULL
);
2046 val
= mips_request ('r', pmon_reg
, 0,
2047 &err
, mips_receive_wait
, NULL
);
2049 mips_error (_("Can't read register %d: %s"), regno
,
2050 safe_strerror (errno
));
2054 mips_set_register (regno
, val
);
2057 /* Prepare to store registers. The MIPS protocol can store individual
2058 registers, so this function doesn't have to do anything. */
2061 mips_prepare_to_store (struct regcache
*regcache
)
2065 /* Store remote register(s). */
2068 mips_store_registers (struct target_ops
*ops
,
2069 struct regcache
*regcache
, int regno
)
2071 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2077 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2078 mips_store_registers (ops
, regcache
, regno
);
2082 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
2083 mips_request (mips_monitor
== MON_ROCKHOPPER
? 'T' : 'R',
2084 mips_map_regno (gdbarch
, regno
),
2086 &err
, mips_receive_wait
, NULL
);
2088 mips_error (_("Can't write register %d: %s"), regno
,
2089 safe_strerror (errno
));
2092 /* Fetch a word from the target board. Return word fetched in location
2093 addressed by VALP. Return 0 when successful; return positive error
2097 mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
)
2101 *valp
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2104 /* Data space failed; try instruction space. */
2105 *valp
= mips_request ('i', addr
, 0, &err
,
2106 mips_receive_wait
, NULL
);
2111 /* Store a word to the target board. Returns errno code or zero for
2112 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2113 memory location there. */
2115 /* FIXME! make sure only 32-bit quantities get stored! */
2117 mips_store_word (CORE_ADDR addr
, unsigned int val
, int *old_contents
)
2120 unsigned int oldcontents
;
2122 oldcontents
= mips_request ('D', addr
, val
, &err
,
2123 mips_receive_wait
, NULL
);
2126 /* Data space failed; try instruction space. */
2127 oldcontents
= mips_request ('I', addr
, val
, &err
,
2128 mips_receive_wait
, NULL
);
2132 if (old_contents
!= NULL
)
2133 *old_contents
= oldcontents
;
2137 /* Read or write LEN bytes from inferior memory at MEMADDR,
2138 transferring to or from debugger address MYADDR. Write to inferior
2139 if SHOULD_WRITE is nonzero. Returns length of data written or
2140 read; 0 for error. Note that protocol gives us the correct value
2141 for a longword, since it transfers values in ASCII. We want the
2142 byte values, so we have to swap the longword values. */
2144 static int mask_address_p
= 1;
2147 mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
, int write
,
2148 struct mem_attrib
*attrib
, struct target_ops
*target
)
2150 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
2157 /* PMON targets do not cope well with 64 bit addresses. Mask the
2158 value down to 32 bits. */
2160 memaddr
&= (CORE_ADDR
) 0xffffffff;
2162 /* Round starting address down to longword boundary. */
2163 addr
= memaddr
& ~3;
2164 /* Round ending address up; get number of longwords that makes. */
2165 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2166 /* Allocate buffer of that many longwords. */
2167 buffer
= alloca (count
* 4);
2171 /* Fill start and end extra bytes of buffer with existing data. */
2172 if (addr
!= memaddr
|| len
< 4)
2176 if (mips_fetch_word (addr
, &val
))
2179 /* Need part of initial word -- fetch it. */
2180 store_unsigned_integer (&buffer
[0], 4, byte_order
, val
);
2187 /* Need part of last word -- fetch it. FIXME: we do this even
2188 if we don't need it. */
2189 if (mips_fetch_word (addr
+ (count
- 1) * 4, &val
))
2192 store_unsigned_integer (&buffer
[(count
- 1) * 4],
2193 4, byte_order
, val
);
2196 /* Copy data to be written over corresponding part of buffer. */
2198 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2200 /* Write the entire buffer. */
2202 for (i
= 0; i
< count
; i
++, addr
+= 4)
2206 word
= extract_unsigned_integer (&buffer
[i
* 4], 4, byte_order
);
2207 status
= mips_store_word (addr
, word
, NULL
);
2208 /* Report each kilobyte (we download 32-bit words at a time). */
2211 printf_unfiltered ("*");
2212 gdb_flush (gdb_stdout
);
2219 /* FIXME: Do we want a QUIT here? */
2222 printf_unfiltered ("\n");
2226 /* Read all the longwords. */
2227 for (i
= 0; i
< count
; i
++, addr
+= 4)
2231 if (mips_fetch_word (addr
, &val
))
2234 store_unsigned_integer (&buffer
[i
* 4], 4, byte_order
, val
);
2238 /* Copy appropriate bytes out of the buffer. */
2239 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2244 /* Print info on this target. */
2247 mips_files_info (struct target_ops
*ignore
)
2249 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2252 /* Kill the process running on the board. This will actually only
2253 work if we are doing remote debugging over the console input. I
2254 think that if IDT/sim had the remote debug interrupt enabled on the
2255 right port, we could interrupt the process with a break signal. */
2258 mips_kill (struct target_ops
*ops
)
2260 if (!mips_wait_flag
)
2262 target_mourn_inferior ();
2268 if (interrupt_count
>= 2)
2270 interrupt_count
= 0;
2272 target_terminal_ours ();
2274 if (query (_("Interrupted while waiting for the program.\n\
2275 Give up (and stop debugging it)? ")))
2277 /* Clean up in such a way that mips_close won't try to talk
2278 to the board (it almost surely won't work since we
2279 weren't able to talk to it). */
2283 printf_unfiltered ("Ending remote MIPS debugging.\n");
2284 target_mourn_inferior ();
2286 deprecated_throw_reason (RETURN_QUIT
);
2289 target_terminal_inferior ();
2292 if (remote_debug
> 0)
2293 printf_unfiltered ("Sending break\n");
2295 serial_send_break (mips_desc
);
2297 target_mourn_inferior ();
2306 serial_write (mips_desc
, &cc
, 1);
2308 target_mourn_inferior ();
2313 /* Start running on the target board. */
2316 mips_create_inferior (struct target_ops
*ops
, char *execfile
,
2317 char *args
, char **env
, int from_tty
)
2324 Can't pass arguments to remote MIPS board; arguments ignored."));
2325 /* And don't try to use them on the next "run" command. */
2326 execute_command ("set args", 0);
2329 if (execfile
== 0 || exec_bfd
== 0)
2330 error (_("No executable file specified"));
2332 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2334 init_wait_for_inferior ();
2336 regcache_write_pc (get_current_regcache (), entry_pt
);
2339 /* Clean up after a process. The bulk of the work is done in mips_close(),
2340 which is called when unpushing the target. */
2343 mips_mourn_inferior (struct target_ops
*ops
)
2345 if (current_ops
!= NULL
)
2346 unpush_target (current_ops
);
2349 /* We can write a breakpoint and read the shadow contents in one
2352 /* Insert a breakpoint. On targets that don't have built-in
2353 breakpoint support, we read the contents of the target location and
2354 stash it, then overwrite it with a breakpoint instruction. ADDR is
2355 the target location in the target machine. BPT is the breakpoint
2356 being inserted or removed, which contains memory for saving the
2360 mips_insert_breakpoint (struct gdbarch
*gdbarch
,
2361 struct bp_target_info
*bp_tgt
)
2363 if (monitor_supports_breakpoints
)
2364 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2367 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
2370 /* Remove a breakpoint. */
2373 mips_remove_breakpoint (struct gdbarch
*gdbarch
,
2374 struct bp_target_info
*bp_tgt
)
2376 if (monitor_supports_breakpoints
)
2377 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2380 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
2383 /* Tell whether this target can support a hardware breakpoint. CNT
2384 is the number of hardware breakpoints already installed. This
2385 implements the target_can_use_hardware_watchpoint macro. */
2388 mips_can_use_watchpoint (int type
, int cnt
, int othertype
)
2390 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2394 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2395 This is used for memory ref breakpoints. */
2397 static unsigned long
2398 calculate_mask (CORE_ADDR addr
, int len
)
2403 mask
= addr
^ (addr
+ len
- 1);
2405 for (i
= 32; i
>= 0; i
--)
2411 mask
= (unsigned long) 0xffffffff >> i
;
2417 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2418 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2422 mips_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
2423 struct expression
*cond
)
2425 if (mips_set_breakpoint (addr
, len
, type
))
2431 /* Remove a watchpoint. */
2434 mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
2435 struct expression
*cond
)
2437 if (mips_clear_breakpoint (addr
, len
, type
))
2443 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2447 mips_stopped_by_watchpoint (void)
2449 return hit_watchpoint
;
2453 /* Insert a breakpoint. */
2456 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2458 return mips_common_breakpoint (1, addr
, len
, type
);
2462 /* Clear a breakpoint. */
2465 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2467 return mips_common_breakpoint (0, addr
, len
, type
);
2471 /* Check the error code from the return packet for an LSI breakpoint
2472 command. If there's no error, just return 0. If it's a warning,
2473 print the warning text and return 0. If it's an error, print
2474 the error text and return 1. <ADDR> is the address of the breakpoint
2475 that was being set. <RERRFLG> is the error code returned by PMON.
2476 This is a helper function for mips_common_breakpoint. */
2479 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2481 struct lsi_error
*err
;
2482 const char *saddr
= paddress (target_gdbarch
, addr
);
2484 if (rerrflg
== 0) /* no error */
2487 /* Warnings can be ORed together, so check them all. */
2488 if (rerrflg
& W_WARN
)
2490 if (monitor_warnings
)
2494 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2496 if ((err
->code
& rerrflg
) == err
->code
)
2499 fprintf_unfiltered (gdb_stderr
, "\
2500 mips_common_breakpoint (%s): Warning: %s\n",
2506 fprintf_unfiltered (gdb_stderr
, "\
2507 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2514 /* Errors are unique, i.e. can't be ORed together. */
2515 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2517 if ((err
->code
& rerrflg
) == err
->code
)
2519 fprintf_unfiltered (gdb_stderr
, "\
2520 mips_common_breakpoint (%s): Error: %s\n",
2526 fprintf_unfiltered (gdb_stderr
, "\
2527 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2534 /* This routine sends a breakpoint command to the remote target.
2536 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2537 <ADDR> is the address of the breakpoint.
2538 <LEN> the length of the region to break on.
2539 <TYPE> is the type of breakpoint:
2540 0 = write (BREAK_WRITE)
2541 1 = read (BREAK_READ)
2542 2 = read/write (BREAK_ACCESS)
2543 3 = instruction fetch (BREAK_FETCH)
2545 Return 0 if successful; otherwise 1. */
2548 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2550 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2551 char buf
[DATA_MAXLEN
+ 1];
2553 int rpid
, rerrflg
, rresponse
, rlen
;
2556 addr
= gdbarch_addr_bits_remove (target_gdbarch
, addr
);
2558 if (mips_monitor
== MON_LSI
)
2560 if (set
== 0) /* clear breakpoint */
2562 /* The LSI PMON "clear breakpoint" has this form:
2563 <pid> 'b' <bptn> 0x0
2565 <pid> 'b' 0x0 <code>
2567 <bptn> is a breakpoint number returned by an earlier 'B' command.
2568 Possible return codes: OK, E_BPT. */
2572 /* Search for the breakpoint in the table. */
2573 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2574 if (lsi_breakpoints
[i
].type
== type
2575 && lsi_breakpoints
[i
].addr
== addr
2576 && lsi_breakpoints
[i
].len
== len
)
2579 /* Clear the table entry and tell PMON to clear the breakpoint. */
2580 if (i
== MAX_LSI_BREAKPOINTS
)
2583 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2584 paddress (target_gdbarch
, addr
));
2588 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2589 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2590 mips_send_packet (buf
, 1);
2592 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2595 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2597 mips_error (_("mips_common_breakpoint: "
2598 "Bad response from remote board: %s"),
2601 return (mips_check_lsi_error (addr
, rerrflg
));
2604 /* set a breakpoint */
2606 /* The LSI PMON "set breakpoint" command has this form:
2607 <pid> 'B' <addr> 0x0
2609 <pid> 'B' <bptn> <code>
2611 The "set data breakpoint" command has this form:
2613 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2615 where: type= "0x1" = read
2617 "0x3" = access (read or write)
2619 The reply returns two values:
2620 bptn - a breakpoint number, which is a small integer with
2621 possible values of zero through 255.
2622 code - an error return code, a value of zero indicates a
2623 succesful completion, other values indicate various
2624 errors and warnings.
2626 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2628 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2631 sprintf (buf
, "0x0 B 0x%s 0x0", phex_nz (addr
, addr_size
));
2637 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s",
2638 phex_nz (addr
, addr_size
),
2639 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2640 phex_nz (addr
+ len
- 1, addr_size
));
2642 mips_send_packet (buf
, 1);
2644 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2647 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2648 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2649 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2650 mips_error (_("mips_common_breakpoint: "
2651 "Bad response from remote board: %s"),
2655 if (mips_check_lsi_error (addr
, rerrflg
))
2658 /* rresponse contains PMON's breakpoint number. Record the
2659 information for this breakpoint so we can clear it later. */
2660 lsi_breakpoints
[rresponse
].type
= type
;
2661 lsi_breakpoints
[rresponse
].addr
= addr
;
2662 lsi_breakpoints
[rresponse
].len
= len
;
2669 /* On non-LSI targets, the breakpoint command has this form:
2670 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2671 <MASK> is a don't care mask for addresses.
2672 <FLAGS> is any combination of `r', `w', or `f' for
2673 read/write/fetch. */
2677 mask
= calculate_mask (addr
, len
);
2680 if (set
) /* set a breakpoint */
2686 case BREAK_WRITE
: /* write */
2689 case BREAK_READ
: /* read */
2692 case BREAK_ACCESS
: /* read/write */
2695 case BREAK_FETCH
: /* fetch */
2699 internal_error (__FILE__
, __LINE__
,
2700 _("failed internal consistency check"));
2704 sprintf (buf
, "0x0 B 0x%s 0x%s %s", phex_nz (addr
, addr_size
),
2705 phex_nz (mask
, addr_size
), flags
);
2710 sprintf (buf
, "0x0 b 0x%s", phex_nz (addr
, addr_size
));
2713 mips_send_packet (buf
, 1);
2715 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2718 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2719 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2721 if (nfields
!= 4 || rcmd
!= cmd
)
2722 mips_error (_("mips_common_breakpoint: "
2723 "Bad response from remote board: %s"),
2728 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2729 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2730 if (mips_monitor
== MON_DDB
)
2731 rresponse
= rerrflg
;
2732 if (rresponse
!= 22) /* invalid argument */
2733 fprintf_unfiltered (gdb_stderr
, "\
2734 mips_common_breakpoint (%s): Got error: 0x%x\n",
2735 paddress (target_gdbarch
, addr
), rresponse
);
2742 /* Send one S record as specified by SREC of length LEN, starting
2743 at ADDR. Note, however, that ADDR is not used except to provide
2744 a useful message to the user in the event that a NACK is received
2748 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2754 serial_write (mips_desc
, srec
, len
);
2756 ch
= mips_readchar (remote_timeout
);
2760 case SERIAL_TIMEOUT
:
2761 error (_("Timeout during download."));
2765 case 0x15: /* NACK */
2766 fprintf_unfiltered (gdb_stderr
,
2767 "Download got a NACK at byte %s! Retrying.\n",
2768 paddress (target_gdbarch
, addr
));
2771 error (_("Download got unexpected ack char: 0x%x, retrying."),
2777 /* Download a binary file by converting it to S records. */
2780 mips_load_srec (char *args
)
2784 char *buffer
, srec
[1024];
2786 unsigned int srec_frame
= 200;
2788 static int hashmark
= 1;
2790 buffer
= alloca (srec_frame
* 2 + 256);
2792 abfd
= bfd_openr (args
, 0);
2795 printf_filtered ("Unable to open file %s\n", args
);
2799 if (bfd_check_format (abfd
, bfd_object
) == 0)
2801 printf_filtered ("File is not an object file\n");
2805 /* This actually causes a download in the IDT binary format: */
2806 mips_send_command (LOAD_CMD
, 0);
2808 for (s
= abfd
->sections
; s
; s
= s
->next
)
2810 if (s
->flags
& SEC_LOAD
)
2812 unsigned int numbytes
;
2814 /* FIXME! vma too small????? */
2815 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2817 (long) (s
->vma
+ bfd_get_section_size (s
)));
2818 gdb_flush (gdb_stdout
);
2820 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2822 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2824 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2826 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2828 send_srec (srec
, reclen
, s
->vma
+ i
);
2830 if (deprecated_ui_load_progress_hook
)
2831 deprecated_ui_load_progress_hook (s
->name
, i
);
2835 putchar_unfiltered ('#');
2836 gdb_flush (gdb_stdout
);
2839 } /* Per-packet (or S-record) loop */
2841 putchar_unfiltered ('\n');
2842 } /* Loadable sections */
2845 putchar_unfiltered ('\n');
2847 /* Write a type 7 terminator record. no data for a type 7, and there
2848 is no data, so len is 0. */
2850 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2852 send_srec (srec
, reclen
, abfd
->start_address
);
2854 serial_flush_input (mips_desc
);
2858 * mips_make_srec -- make an srecord. This writes each line, one at a
2859 * time, each with it's own header and trailer line.
2860 * An srecord looks like this:
2862 * byte count-+ address
2863 * start ---+ | | data +- checksum
2865 * S01000006F6B692D746573742E73726563E4
2866 * S315000448600000000000000000FC00005900000000E9
2867 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2868 * S30B0004485A0000000000004E
2871 * S<type><length><address><data><checksum>
2875 * is the number of bytes following upto the checksum. Note that
2876 * this is not the number of chars following, since it takes two
2877 * chars to represent a byte.
2881 * 1) two byte address data record
2882 * 2) three byte address data record
2883 * 3) four byte address data record
2884 * 7) four byte address termination record
2885 * 8) three byte address termination record
2886 * 9) two byte address termination record
2889 * is the start address of the data following, or in the case of
2890 * a termination record, the start address of the image
2894 * is the sum of all the raw byte data in the record, from the length
2895 * upwards, modulo 256 and subtracted from 255.
2897 * This routine returns the length of the S-record.
2902 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2905 unsigned char checksum
;
2908 /* Create the header for the srec. addr_size is the number of bytes
2909 in the address, and 1 is the number of bytes in the count. */
2911 /* FIXME!! bigger buf required for 64-bit! */
2914 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2915 /* This assumes S3 style downloads (4byte addresses). There should
2916 probably be a check, or the code changed to make it more
2918 buf
[3] = memaddr
>> 24;
2919 buf
[4] = memaddr
>> 16;
2920 buf
[5] = memaddr
>> 8;
2922 memcpy (&buf
[7], myaddr
, len
);
2924 /* Note that the checksum is calculated on the raw data, not the
2925 hexified data. It includes the length, address and the data
2926 portions of the packet. */
2928 buf
+= 2; /* Point at length byte. */
2929 for (i
= 0; i
< len
+ 4 + 1; i
++)
2937 /* The following manifest controls whether we enable the simple flow
2938 control support provided by the monitor. If enabled the code will
2939 wait for an affirmative ACK between transmitting packets. */
2940 #define DOETXACK (1)
2942 /* The PMON fast-download uses an encoded packet format constructed of
2943 3byte data packets (encoded as 4 printable ASCII characters), and
2944 escape sequences (preceded by a '/'):
2947 'C' compare checksum (12bit value, not included in checksum calculation)
2948 'S' define symbol name (for addr) terminated with ","
2949 and padded to 4char boundary
2950 'Z' zero fill multiple of 3bytes
2951 'B' byte (12bit encoded value, of 8bit data)
2952 'A' address (36bit encoded value)
2953 'E' define entry as original address, and exit load
2955 The packets are processed in 4 character chunks, so the escape
2956 sequences that do not have any data (or variable length data)
2957 should be padded to a 4 character boundary. The decoder will give
2958 an error if the complete message block size is not a multiple of
2959 4bytes (size of record).
2961 The encoding of numbers is done in 6bit fields. The 6bit value is
2962 used to index into this string to get the specific character
2963 encoding for the value: */
2964 static char encoding
[] =
2965 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2967 /* Convert the number of bits required into an encoded number, 6bits
2968 at a time (range 0..63). Keep a checksum if required (passed
2969 pointer non-NULL). The function returns the number of encoded
2970 characters written into the buffer. */
2973 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2975 int count
= (n
/ 6);
2979 fprintf_unfiltered (gdb_stderr
,
2980 "Fast encoding bitcount must be a "
2981 "multiple of 12bits: %dbit%s\n",
2982 n
, (n
== 1) ? "" : "s");
2987 fprintf_unfiltered (gdb_stderr
,
2988 "Fast encoding cannot process more "
2989 "than 36bits at the moment: %dbits\n", n
);
2993 /* Deal with the checksum: */
2999 *chksum
+= ((v
>> 24) & 0xFFF);
3001 *chksum
+= ((v
>> 12) & 0xFFF);
3003 *chksum
+= ((v
>> 0) & 0xFFF);
3010 *p
++ = encoding
[(v
>> n
) & 0x3F];
3017 /* Shorthand function (that could be in-lined) to output the zero-fill
3018 escape sequence into the data stream. */
3021 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
3025 sprintf (*buff
, "/Z");
3026 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3027 *buff
+= (count
+ 2);
3029 return (recsize
+ count
+ 2);
3032 /* Add the checksum specified by *VALUE to end of the record under
3033 construction. *BUF specifies the location at which to begin
3034 writing characters comprising the checksum information. RECSIZE
3035 specifies the size of the record constructed thus far. (A trailing
3036 NUL character may be present in the buffer holding the record, but
3037 the record size does not include this character.)
3039 Return the total size of the record after adding the checksum escape,
3040 the checksum itself, and the trailing newline.
3042 The checksum specified by *VALUE is zeroed out prior to returning.
3043 Additionally, *BUF is updated to refer to the location just beyond
3044 the record elements added by this call. */
3047 pmon_checkset (int recsize
, char **buff
, int *value
)
3051 /* Add the checksum (without updating the value): */
3052 sprintf (*buff
, "/C");
3053 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3054 *buff
+= (count
+ 2);
3055 sprintf (*buff
, "\n");
3056 *buff
+= 2; /* Include zero terminator. */
3057 /* Forcing a checksum validation clears the sum: */
3059 return (recsize
+ count
+ 3);
3062 /* Amount of padding we leave after at the end of the output buffer,
3063 for the checksum and line termination characters: */
3064 #define CHECKSIZE (4 + 4 + 4 + 2)
3065 /* zero-fill, checksum, transfer end and line termination space. */
3067 /* The amount of binary data loaded from the object file in a single
3069 #define BINCHUNK (1024)
3071 /* Maximum line of data accepted by the monitor: */
3072 #define MAXRECSIZE (550)
3073 /* NOTE: This constant depends on the monitor being used. This value
3074 is for PMON 5.x on the Cogent Vr4300 board. */
3076 /* Create a FastLoad format record.
3078 *OUTBUF is the buffer into which a FastLoad formatted record is
3079 written. On return, the pointer position represented by *OUTBUF
3080 is updated to point at the end of the data, i.e. the next position
3081 in the buffer that may be written. No attempt is made to NUL-
3082 terminate this portion of the record written to the buffer.
3084 INBUF contains the binary input data from which the FastLoad
3085 formatted record will be built. *INPTR is an index into this
3086 buffer. *INPTR is updated as the input is consumed. Thus, on
3087 return, the caller has access to the position of the next input
3088 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3091 *RECSIZE will be written with the size of the record written to the
3092 output buffer prior to returning. This size does not include a
3093 NUL-termination byte as none is written to the output buffer.
3095 *CSUM is the output buffer checksum. It is updated as data is
3096 written to the output buffer.
3098 *ZEROFILL is the current number of 3-byte zero sequences that have
3099 been encountered. It is both an input and an output to this
3103 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3104 int inamount
, int *recsize
, unsigned int *csum
,
3105 unsigned int *zerofill
)
3110 /* This is a simple check to ensure that our data will fit within
3111 the maximum allowable record size. Each record output is 4bytes
3112 in length. We must allow space for a pending zero fill command,
3113 the record, and a checksum record. */
3114 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3116 /* Process the binary data: */
3117 if ((inamount
- *inptr
) < 3)
3120 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3122 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3124 *recsize
+= (2 + count
);
3129 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16)
3130 | (inbuf
[*inptr
+ 1] << 8)
3131 | (inbuf
[*inptr
+ 2]));
3133 /* Simple check for zero data. TODO: A better check would be
3134 to check the last, and then the middle byte for being zero
3135 (if the first byte is not). We could then check for
3136 following runs of zeros, and if above a certain size it is
3137 worth the 4 or 8 character hit of the byte insertions used
3138 to pad to the start of the zeroes. NOTE: This also depends
3139 on the alignment at the end of the zero run. */
3140 if (value
== 0x00000000)
3143 if (*zerofill
== 0xFFF) /* 12bit counter */
3144 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3149 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3150 count
= pmon_makeb64 (value
, p
, 24, csum
);
3162 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3163 output the message specified by MESG. Return -1 for failure, 0
3167 pmon_check_ack (char *mesg
)
3169 #if defined(DOETXACK)
3174 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
3176 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3178 fprintf_unfiltered (gdb_stderr
,
3179 "Failed to receive valid ACK for %s\n", mesg
);
3180 return (-1); /* Terminate the download. */
3183 #endif /* DOETXACK */
3187 /* pmon_download - Send a sequence of characters to the PMON download port,
3188 which is either a serial port or a UDP socket. */
3191 pmon_start_download (void)
3195 /* Create the temporary download file. */
3196 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3197 perror_with_name (tftp_localname
);
3201 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3202 mips_expect ("Downloading from ");
3203 mips_expect (udp_in_use
? "udp" : "tty0");
3204 mips_expect (", ^C to abort\r\n");
3208 /* Look for the string specified by STRING sent from the target board
3209 during a download operation. If the string in question is not
3210 seen, output an error message, remove the temporary file, if
3211 appropriate, and return 0. Otherwise, return 1 to indicate
3215 mips_expect_download (char *string
)
3217 if (!mips_expect (string
))
3219 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3221 remove (tftp_localname
); /* Remove temporary file. */
3228 /* Look for messages from the target board associated with the entry
3231 NOTE: This function doesn't indicate success or failure, so we
3232 have no way to determine whether or not the output from the board
3233 was correctly seen. However, given that other items are checked
3234 after this, it seems unlikely that those checks will pass if this
3235 check doesn't first (silently) pass. */
3238 pmon_check_entry_address (char *entry_address
, int final
)
3240 char hexnumber
[9]; /* Includes '\0' space. */
3242 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3243 sprintf (hexnumber
, "%x", final
);
3244 mips_expect (hexnumber
);
3245 mips_expect ("\r\n");
3248 /* Look for messages from the target board showing the total number of
3249 bytes downloaded to the board. Output 1 for success if the tail
3250 end of the message was read correctly, 0 otherwise. */
3253 pmon_check_total (int bintotal
)
3255 char hexnumber
[9]; /* Includes '\0' space. */
3257 mips_expect ("\r\ntotal = 0x");
3258 sprintf (hexnumber
, "%x", bintotal
);
3259 mips_expect (hexnumber
);
3260 return mips_expect_download (" bytes\r\n");
3263 /* Look for the termination messages associated with the end of
3264 a download to the board.
3266 Also, when `tftp_in_use' is set, issue the load command to the
3267 board causing the file to be transferred. (This is done prior
3268 to looking for the above mentioned termination messages.) */
3271 pmon_end_download (int final
, int bintotal
)
3273 char hexnumber
[9]; /* Includes '\0' space. */
3277 static char *load_cmd_prefix
= "load -b -s ";
3281 /* Close off the temporary file containing the load data. */
3285 /* Make the temporary file readable by the world. */
3286 if (stat (tftp_localname
, &stbuf
) == 0)
3287 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3289 /* Must reinitialize the board to prevent PMON from crashing. */
3290 if (mips_monitor
!= MON_ROCKHOPPER
)
3291 mips_send_command ("initEther\r", -1);
3293 /* Send the load command. */
3294 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3295 strcpy (cmd
, load_cmd_prefix
);
3296 strcat (cmd
, tftp_name
);
3298 mips_send_command (cmd
, 0);
3300 if (!mips_expect_download ("Downloading from "))
3302 if (!mips_expect_download (tftp_name
))
3304 if (!mips_expect_download (", ^C to abort\r\n"))
3308 /* Wait for the stuff that PMON prints after the load has completed.
3309 The timeout value for use in the tftp case (15 seconds) was picked
3310 arbitrarily but might be too small for really large downloads. FIXME. */
3311 switch (mips_monitor
)
3314 pmon_check_ack ("termination");
3315 pmon_check_entry_address ("Entry address is ", final
);
3316 if (!pmon_check_total (bintotal
))
3319 case MON_ROCKHOPPER
:
3320 if (!pmon_check_total (bintotal
))
3322 pmon_check_entry_address ("Entry Address = ", final
);
3325 pmon_check_entry_address ("Entry Address = ", final
);
3326 pmon_check_ack ("termination");
3327 if (!pmon_check_total (bintotal
))
3333 remove (tftp_localname
); /* Remove temporary file. */
3336 /* Write the buffer specified by BUFFER of length LENGTH to either
3337 the board or the temporary file that'll eventually be transferred
3341 pmon_download (char *buffer
, int length
)
3347 written
= fwrite (buffer
, 1, length
, tftp_file
);
3348 if (written
< length
)
3349 perror_with_name (tftp_localname
);
3352 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3355 /* Open object or executable file, FILE, and send it to the board
3356 using the FastLoad format. */
3359 pmon_load_fast (char *file
)
3363 unsigned char *binbuf
;
3366 unsigned int csum
= 0;
3367 int hashmark
= !tftp_in_use
;
3372 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3373 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3375 abfd
= bfd_openr (file
, 0);
3378 printf_filtered ("Unable to open file %s\n", file
);
3382 if (bfd_check_format (abfd
, bfd_object
) == 0)
3384 printf_filtered ("File is not an object file\n");
3388 /* Setup the required download state: */
3389 mips_send_command ("set dlproto etxack\r", -1);
3390 mips_send_command ("set dlecho off\r", -1);
3391 /* NOTE: We get a "cannot set variable" message if the variable is
3392 already defined to have the argument we give. The code doesn't
3393 care, since it just scans to the next prompt anyway. */
3394 /* Start the download: */
3395 pmon_start_download ();
3397 /* Zero the checksum. */
3398 sprintf (buffer
, "/Kxx\n");
3399 reclen
= strlen (buffer
);
3400 pmon_download (buffer
, reclen
);
3401 finished
= pmon_check_ack ("/Kxx");
3403 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3404 if (s
->flags
& SEC_LOAD
) /* Only deal with loadable sections. */
3406 bintotal
+= bfd_get_section_size (s
);
3407 final
= (s
->vma
+ bfd_get_section_size (s
));
3409 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
,
3410 (unsigned int) s
->vma
,
3411 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3412 gdb_flush (gdb_stdout
);
3414 /* Output the starting address. */
3415 sprintf (buffer
, "/A");
3416 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3417 buffer
[2 + reclen
] = '\n';
3418 buffer
[3 + reclen
] = '\0';
3419 reclen
+= 3; /* For the initial escape code and carriage return. */
3420 pmon_download (buffer
, reclen
);
3421 finished
= pmon_check_ack ("/A");
3425 unsigned int binamount
;
3426 unsigned int zerofill
= 0;
3433 i
< bfd_get_section_size (s
) && !finished
;
3438 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3440 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3442 /* This keeps a rolling checksum, until we decide to output
3444 for (; ((binamount
- binptr
) > 0);)
3446 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3447 &reclen
, &csum
, &zerofill
);
3448 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3450 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3451 pmon_download (buffer
, reclen
);
3452 finished
= pmon_check_ack ("data record");
3455 zerofill
= 0; /* Do not transmit pending
3460 if (deprecated_ui_load_progress_hook
)
3461 deprecated_ui_load_progress_hook (s
->name
, i
);
3465 putchar_unfiltered ('#');
3466 gdb_flush (gdb_stdout
);
3470 reclen
= 0; /* buffer processed */
3475 /* Ensure no out-standing zerofill requests: */
3477 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3479 /* and then flush the line: */
3482 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3483 /* Currently pmon_checkset outputs the line terminator by
3484 default, so we write out the buffer so far: */
3485 pmon_download (buffer
, reclen
);
3486 finished
= pmon_check_ack ("record remnant");
3490 putchar_unfiltered ('\n');
3493 /* Terminate the transfer. We know that we have an empty output
3494 buffer at this point. */
3495 sprintf (buffer
, "/E/E\n"); /* Include dummy padding characters. */
3496 reclen
= strlen (buffer
);
3497 pmon_download (buffer
, reclen
);
3500 { /* Ignore the termination message: */
3501 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3504 { /* Deal with termination message: */
3505 pmon_end_download (final
, bintotal
);
3511 /* mips_load -- download a file. */
3514 mips_load (char *file
, int from_tty
)
3516 struct regcache
*regcache
;
3518 /* Get the board out of remote debugging mode. */
3519 if (mips_exit_debug ())
3520 error (_("mips_load: Couldn't get into monitor mode."));
3522 if (mips_monitor
!= MON_IDT
)
3523 pmon_load_fast (file
);
3525 mips_load_srec (file
);
3529 /* Finally, make the PC point at the start address. */
3530 regcache
= get_current_regcache ();
3531 if (mips_monitor
!= MON_IDT
)
3533 /* Work around problem where PMON monitor updates the PC after a load
3534 to a different value than GDB thinks it has. The following ensures
3535 that the regcache_write_pc() WILL update the PC value: */
3536 regcache_invalidate (regcache
,
3537 mips_regnum (get_regcache_arch (regcache
))->pc
);
3540 regcache_write_pc (regcache
, bfd_get_start_address (exec_bfd
));
3543 /* Check to see if a thread is still alive. */
3546 mips_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
3548 if (ptid_equal (ptid
, remote_mips_ptid
))
3549 /* The monitor's task is always alive. */
3555 /* Convert a thread ID to a string. Returns the string in a static
3559 mips_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3561 static char buf
[64];
3563 if (ptid_equal (ptid
, remote_mips_ptid
))
3565 xsnprintf (buf
, sizeof buf
, "Thread <main>");
3569 return normal_pid_to_str (ptid
);
3572 /* Pass the command argument as a packet to PMON verbatim. */
3575 pmon_command (char *args
, int from_tty
)
3577 char buf
[DATA_MAXLEN
+ 1];
3580 sprintf (buf
, "0x0 %s", args
);
3581 mips_send_packet (buf
, 1);
3582 printf_filtered ("Send packet: %s\n", buf
);
3584 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3586 printf_filtered ("Received packet: %s\n", buf
);
3589 /* -Wmissing-prototypes */
3590 extern initialize_file_ftype _initialize_remote_mips
;
3592 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3593 Create target specific commands and perform other initializations
3594 specific to this file. */
3597 _initialize_remote_mips (void)
3599 /* Initialize the fields in mips_ops that are common to all four targets. */
3600 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3601 mips_ops
.to_close
= mips_close
;
3602 mips_ops
.to_detach
= mips_detach
;
3603 mips_ops
.to_resume
= mips_resume
;
3604 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3605 mips_ops
.to_store_registers
= mips_store_registers
;
3606 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3607 mips_ops
.deprecated_xfer_memory
= mips_xfer_memory
;
3608 mips_ops
.to_files_info
= mips_files_info
;
3609 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3610 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3611 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3612 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3613 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3614 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3615 mips_ops
.to_kill
= mips_kill
;
3616 mips_ops
.to_load
= mips_load
;
3617 mips_ops
.to_create_inferior
= mips_create_inferior
;
3618 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3619 mips_ops
.to_thread_alive
= mips_thread_alive
;
3620 mips_ops
.to_pid_to_str
= mips_pid_to_str
;
3621 mips_ops
.to_log_command
= serial_log_command
;
3622 mips_ops
.to_stratum
= process_stratum
;
3623 mips_ops
.to_has_all_memory
= default_child_has_all_memory
;
3624 mips_ops
.to_has_memory
= default_child_has_memory
;
3625 mips_ops
.to_has_stack
= default_child_has_stack
;
3626 mips_ops
.to_has_registers
= default_child_has_registers
;
3627 mips_ops
.to_has_execution
= default_child_has_execution
;
3628 mips_ops
.to_magic
= OPS_MAGIC
;
3630 /* Copy the common fields to all four target vectors. */
3631 rockhopper_ops
= pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3633 /* Initialize target-specific fields in the target vectors. */
3634 mips_ops
.to_shortname
= "mips";
3635 mips_ops
.to_doc
= "\
3636 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3637 The argument is the device it is connected to or, if it contains a colon,\n\
3638 HOST:PORT to access a board over a network";
3639 mips_ops
.to_open
= mips_open
;
3640 mips_ops
.to_wait
= mips_wait
;
3642 pmon_ops
.to_shortname
= "pmon";
3643 pmon_ops
.to_doc
= "\
3644 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3645 line. The argument is the device it is connected to or, if it contains a\n\
3646 colon, HOST:PORT to access a board over a network";
3647 pmon_ops
.to_open
= pmon_open
;
3648 pmon_ops
.to_wait
= mips_wait
;
3650 ddb_ops
.to_shortname
= "ddb";
3652 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3653 line. The first argument is the device it is connected to or, if it contains\n\
3654 a colon, HOST:PORT to access a board over a network. The optional second\n\
3655 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3656 TFTP downloads to the board. The optional third parameter is the local name\n\
3657 of the TFTP temporary file, if it differs from the filename seen by the board.";
3658 ddb_ops
.to_open
= ddb_open
;
3659 ddb_ops
.to_wait
= mips_wait
;
3661 rockhopper_ops
.to_shortname
= "rockhopper";
3662 rockhopper_ops
.to_doc
= ddb_ops
.to_doc
;
3663 rockhopper_ops
.to_open
= rockhopper_open
;
3664 rockhopper_ops
.to_wait
= mips_wait
;
3666 lsi_ops
.to_shortname
= "lsi";
3667 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3668 lsi_ops
.to_open
= lsi_open
;
3669 lsi_ops
.to_wait
= mips_wait
;
3671 /* Add the targets. */
3672 add_target (&mips_ops
);
3673 add_target (&pmon_ops
);
3674 add_target (&ddb_ops
);
3675 add_target (&lsi_ops
);
3676 add_target (&rockhopper_ops
);
3678 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3679 Set timeout in seconds for remote MIPS serial I/O."), _("\
3680 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3682 NULL
, /* FIXME: i18n: */
3683 &setlist
, &showlist
);
3685 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3686 &mips_retransmit_wait
, _("\
3687 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3688 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3689 This is the number of seconds to wait for an acknowledgement to a packet\n\
3690 before resending the packet."),
3692 NULL
, /* FIXME: i18n: */
3693 &setlist
, &showlist
);
3695 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3696 &mips_syn_garbage
, _("\
3697 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3698 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3699 This is the maximum number of characters GDB will ignore when trying to\n\
3700 synchronize with the remote system. A value of -1 means that there is no\n\
3701 limit. (Note that these characters are printed out even though they are\n\
3704 NULL
, /* FIXME: i18n: */
3705 &setlist
, &showlist
);
3707 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3708 &mips_monitor_prompt
, _("\
3709 Set the prompt that GDB expects from the monitor."), _("\
3710 Show the prompt that GDB expects from the monitor."), NULL
,
3712 NULL
, /* FIXME: i18n: */
3713 &setlist
, &showlist
);
3715 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3716 &monitor_warnings
, _("\
3717 Set printing of monitor warnings."), _("\
3718 Show printing of monitor warnings."), _("\
3719 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3721 NULL
, /* FIXME: i18n: */
3722 &setlist
, &showlist
);
3724 add_com ("pmon", class_obscure
, pmon_command
,
3725 _("Send a packet to PMON (must be in debug mode)."));
3727 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3728 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3729 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3730 Use \"on\" to enable the masking and \"off\" to disable it."),
3732 NULL
, /* FIXME: i18n: */
3733 &setlist
, &showlist
);
3734 remote_mips_ptid
= ptid_build (42000, 0, 42000);