1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2014 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"
34 #include "gdb_usleep.h"
37 #include "mips-tdep.h"
38 #include "gdbthread.h"
42 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
43 types passed by breakpoint.c to target_insert_watchpoint.
44 Value 3 is our own invention, and is used for ordinary instruction
45 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
55 /* Prototypes for local functions. */
57 static int mips_readchar (int timeout
);
59 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
62 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
63 int *pch
, int timeout
);
65 static int mips_cksum (const unsigned char *hdr
,
66 const char *data
, int len
);
68 static void mips_send_packet (const char *s
, int get_ack
);
70 static void mips_send_command (const char *cmd
, int prompt
);
72 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
74 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
75 int *perr
, int timeout
, char *buff
);
77 static void mips_initialize (void);
79 static void mips_open (char *name
, int from_tty
);
81 static void pmon_open (char *name
, int from_tty
);
83 static void ddb_open (char *name
, int from_tty
);
85 static void lsi_open (char *name
, int from_tty
);
87 static void mips_close (struct target_ops
*self
);
89 static int mips_map_regno (struct gdbarch
*, int);
91 static void mips_set_register (int regno
, ULONGEST value
);
93 static void mips_prepare_to_store (struct target_ops
*self
,
94 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
, unsigned int *chksum
);
112 static int pmon_zeroset (int recsize
, char **buff
, unsigned int *amount
,
113 unsigned int *chksum
);
115 static int pmon_checkset (int recsize
, char **buff
, unsigned 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 (struct target_ops
*self
, 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
,...)
492 target_terminal_ours ();
493 wrap_here (""); /* Force out any buffered output. */
494 gdb_flush (gdb_stdout
);
495 gdb_flush (gdb_stderr
);
497 /* Clean up in such a way that mips_close won't try to talk to the
498 board (it almost surely won't work since we weren't able to talk to
502 if (!ptid_equal (inferior_ptid
, null_ptid
))
503 target_mourn_inferior ();
505 fmt
= concat (_("Ending remote MIPS debugging: "),
506 string
, (char *) NULL
);
507 make_cleanup (xfree
, fmt
);
509 va_start (args
, string
);
510 throw_verror (TARGET_CLOSE_ERROR
, fmt
, args
);
514 /* putc_readable - print a character, displaying non-printable chars in
515 ^x notation or in hex. */
518 fputc_readable (int ch
, struct ui_file
*file
)
521 fputc_unfiltered ('\n', file
);
523 fprintf_unfiltered (file
, "\\r");
524 else if (ch
< 0x20) /* ASCII control character */
525 fprintf_unfiltered (file
, "^%c", ch
+ '@');
526 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
527 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
529 fputc_unfiltered (ch
, file
);
533 /* puts_readable - print a string, displaying non-printable chars in
534 ^x notation or in hex. */
537 fputs_readable (const char *string
, struct ui_file
*file
)
541 while ((c
= *string
++) != '\0')
542 fputc_readable (c
, file
);
546 /* Read P as a hex value. Return true if every character made sense,
547 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
550 read_hex_value (const char *p
, ULONGEST
*result
)
558 if (*p
>= '0' && *p
<= '9')
560 else if (*p
>= 'A' && *p
<= 'F')
561 retval
|= *p
- 'A' + 10;
562 else if (*p
>= 'a' && *p
<= 'f')
563 retval
|= *p
- 'a' + 10;
573 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
574 timed out. TIMEOUT specifies timeout value in seconds. */
577 mips_expect_timeout (const char *string
, int timeout
)
579 const char *p
= string
;
583 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
584 fputs_readable (string
, gdb_stdlog
);
585 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 DATASTR points to the packet data. LEN is the length of DATASTR. */
828 mips_cksum (const unsigned char *hdr
, const char *datastr
, int len
)
830 const unsigned char *p
;
831 const unsigned char *data
= (const unsigned char *) datastr
;
837 /* The initial SYN is not included in the checksum. */
851 /* Send a packet containing the given ASCII string. */
854 mips_send_packet (const char *s
, int get_ack
)
856 /* unsigned */ int len
;
857 unsigned char *packet
;
862 if (len
> DATA_MAXLEN
)
863 mips_error (_("MIPS protocol data packet too long: %s"), s
);
865 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
867 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
868 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
869 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
870 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
872 memcpy (packet
+ HDR_LENGTH
, s
, len
);
874 cksum
= mips_cksum (packet
, (char *) packet
+ HDR_LENGTH
, len
);
875 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
876 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
877 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
879 /* Increment the sequence number. This will set mips_send_seq to
880 the sequence number we expect in the acknowledgement. */
881 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
883 /* We can only have one outstanding data packet, so we just wait for
884 the acknowledgement here. Keep retransmitting the packet until
885 we get one, or until we've tried too many times. */
886 for (try = 0; try < mips_send_retries
; try++)
891 if (remote_debug
> 0)
893 /* Don't use _filtered; we can't deal with a QUIT out of
894 target_wait, and I think this might be called from there. */
895 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
896 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
899 if (serial_write (mips_desc
, packet
,
900 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
901 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
910 unsigned char hdr
[HDR_LENGTH
+ 1];
911 unsigned char trlr
[TRLR_LENGTH
+ 1];
915 /* Get the packet header. If we time out, resend the data
917 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
923 /* If we get a data packet, assume it is a duplicate and
924 ignore it. FIXME: If the acknowledgement is lost, this
925 data packet may be the packet the remote sends after the
927 if (HDR_IS_DATA (hdr
))
931 /* Ignore any errors raised whilst attempting to ignore
934 len
= HDR_GET_LEN (hdr
);
936 for (i
= 0; i
< len
; i
++)
940 rch
= mips_readchar (remote_timeout
);
946 if (rch
== SERIAL_TIMEOUT
)
948 /* Ignore the character. */
952 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
955 /* We don't bother checking the checksum, or providing an
956 ACK to the packet. */
960 /* If the length is not 0, this is a garbled packet. */
961 if (HDR_GET_LEN (hdr
) != 0)
964 /* Get the packet trailer. */
965 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
966 mips_retransmit_wait
);
968 /* If we timed out, resend the data packet. */
972 /* If we got a bad character, reread the header. */
976 /* If the checksum does not match the trailer checksum, this
977 is a bad packet; ignore it. */
978 if (mips_cksum (hdr
, NULL
, 0) != 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
, 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
, 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!"))
1388 do_cleanups (old_cleanups
);
1393 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1395 if (!mips_expect (mips_monitor_prompt
))
1397 do_cleanups (old_cleanups
);
1401 do_cleanups (old_cleanups
);
1406 /* Initialize a new connection to the MIPS board, and make sure we are
1407 really connected. */
1410 mips_initialize (void)
1413 struct cleanup
*old_cleanups
;
1416 /* What is this code doing here? I don't see any way it can happen, and
1417 it might mean mips_initializing didn't get cleared properly.
1418 So I'll make it a warning. */
1420 if (mips_initializing
)
1422 warning (_("internal error: mips_initialize called twice"));
1426 old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1429 mips_initializing
= 1;
1431 /* At this point, the packit protocol isn't responding. We'll try getting
1432 into the monitor, and restarting the protocol. */
1434 /* Force the system into the monitor. After this we *should* be at
1435 the mips_monitor_prompt. */
1436 if (mips_monitor
!= MON_IDT
)
1437 j
= 0; /* Start by checking if we are already
1440 j
= 1; /* Start by sending a break. */
1445 case 0: /* First, try sending a CR. */
1446 serial_flush_input (mips_desc
);
1447 serial_write (mips_desc
, "\r", 1);
1449 case 1: /* First, try sending a break. */
1450 serial_send_break (mips_desc
);
1452 case 2: /* Then, try a ^C. */
1453 serial_write (mips_desc
, "\003", 1);
1455 case 3: /* Then, try escaping from download. */
1457 if (mips_monitor
!= MON_IDT
)
1461 /* We shouldn't need to send multiple termination
1462 sequences, since the target performs line (or
1463 block) reads, and then processes those
1464 packets. In-case we were downloading a large packet
1465 we flush the output buffer before inserting a
1466 termination sequence. */
1467 serial_flush_output (mips_desc
);
1468 sprintf (tbuff
, "\r/E/E\r");
1469 serial_write (mips_desc
, tbuff
, 6);
1476 /* We are possibly in binary download mode, having
1477 aborted in the middle of an S-record. ^C won't
1478 work because of binary mode. The only reliable way
1479 out is to send enough termination packets (8 bytes)
1480 to fill up and then overflow the largest size
1481 S-record (255 bytes in this case). This amounts to
1482 256/8 + 1 packets. */
1484 mips_make_srec (srec
, '7', 0, NULL
, 0);
1486 for (i
= 1; i
<= 33; i
++)
1488 serial_write (mips_desc
, srec
, 8);
1490 if (serial_readchar (mips_desc
, 0) >= 0)
1491 break; /* Break immediatly if we get something from
1498 mips_error (_("Failed to initialize."));
1501 if (mips_expect (mips_monitor_prompt
))
1505 if (mips_monitor
!= MON_IDT
)
1507 /* Sometimes PMON ignores the first few characters in the first
1508 command sent after a load. Sending a blank command gets
1510 mips_send_command ("\r", -1);
1512 /* Ensure the correct target state: */
1513 if (mips_monitor
!= MON_LSI
)
1514 mips_send_command ("set regsize 64\r", -1);
1515 mips_send_command ("set hostport tty0\r", -1);
1516 mips_send_command ("set brkcmd \"\"\r", -1);
1517 /* Delete all the current breakpoints: */
1518 mips_send_command ("db *\r", -1);
1519 /* NOTE: PMON does not have breakpoint support through the
1520 "debug" mode, only at the monitor command-line. */
1523 mips_enter_debug ();
1525 /* Clear all breakpoints: */
1526 if ((mips_monitor
== MON_IDT
1527 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1528 || mips_monitor
== MON_LSI
)
1529 monitor_supports_breakpoints
= 1;
1531 monitor_supports_breakpoints
= 0;
1533 do_cleanups (old_cleanups
);
1535 /* If this doesn't call error, we have connected; we don't care if
1536 the request itself succeeds or fails. */
1538 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1541 /* Open a connection to the remote board. */
1544 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1545 enum mips_monitor_type new_monitor
,
1546 const char *new_monitor_prompt
)
1548 char *serial_port_name
;
1549 char *remote_name
= 0;
1550 char *local_name
= 0;
1552 struct cleanup
*cleanup
;
1556 To open a MIPS remote debugging connection, you need to specify what\n\
1557 serial device is attached to the target board (e.g., /dev/ttya).\n\
1558 If you want to use TFTP to download to the board, specify the name of a\n\
1559 temporary file to be used by GDB for downloads as the second argument.\n\
1560 This filename must be in the form host:filename, where host is the name\n\
1561 of the host running the TFTP server, and the file must be readable by the\n\
1562 world. If the local name of the temporary file differs from the name as\n\
1563 seen from the board via TFTP, specify that name as the third parameter.\n"));
1565 /* Parse the serial port name, the optional TFTP name, and the
1566 optional local TFTP name. */
1567 argv
= gdb_buildargv (name
);
1568 cleanup
= make_cleanup_freeargv (argv
);
1570 serial_port_name
= xstrdup (argv
[0]);
1571 if (argv
[1]) /* Remote TFTP name specified? */
1573 remote_name
= argv
[1];
1574 if (argv
[2]) /* Local TFTP filename specified? */
1575 local_name
= argv
[2];
1578 target_preopen (from_tty
);
1581 unpush_target (current_ops
);
1583 /* Open and initialize the serial port. */
1584 mips_desc
= serial_open (serial_port_name
);
1585 if (mips_desc
== NULL
)
1586 perror_with_name (serial_port_name
);
1588 if (baud_rate
!= -1)
1590 if (serial_setbaudrate (mips_desc
, baud_rate
))
1592 serial_close (mips_desc
);
1593 perror_with_name (serial_port_name
);
1597 serial_raw (mips_desc
);
1599 /* Open and initialize the optional download port. If it is in the form
1600 hostname#portnumber, it's a UDP socket. If it is in the form
1601 hostname:filename, assume it's the TFTP filename that must be
1602 passed to the DDB board to tell it where to get the load file. */
1605 if (strchr (remote_name
, '#'))
1607 udp_desc
= serial_open (remote_name
);
1609 perror_with_name (_("Unable to open UDP port"));
1614 /* Save the remote and local names of the TFTP temp file. If
1615 the user didn't specify a local name, assume it's the same
1616 as the part of the remote name after the "host:". */
1620 xfree (tftp_localname
);
1621 if (local_name
== NULL
)
1622 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1623 local_name
++; /* Skip over the colon. */
1624 if (local_name
== NULL
)
1625 local_name
= remote_name
; /* Local name same as remote name. */
1626 tftp_name
= xstrdup (remote_name
);
1627 tftp_localname
= xstrdup (local_name
);
1635 /* Reset the expected monitor prompt if it's never been set before. */
1636 if (mips_monitor_prompt
== NULL
)
1637 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1638 mips_monitor
= new_monitor
;
1643 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1645 /* Switch to using remote target now. */
1648 inferior_ptid
= remote_mips_ptid
;
1649 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid
));
1650 add_thread_silent (inferior_ptid
);
1652 /* Try to figure out the processor model if possible. */
1653 deprecated_mips_set_processor_regs_hack ();
1655 /* This is really the job of start_remote however, that makes an
1656 assumption that the target is about to print out a status message
1657 of some sort. That doesn't happen here (in fact, it may not be
1658 possible to get the monitor to send the appropriate packet). */
1660 reinit_frame_cache ();
1661 registers_changed ();
1662 stop_pc
= regcache_read_pc (get_current_regcache ());
1663 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
, 1);
1664 xfree (serial_port_name
);
1666 do_cleanups (cleanup
);
1669 /* Open a connection to an IDT board. */
1672 mips_open (char *name
, int from_tty
)
1674 const char *monitor_prompt
= NULL
;
1675 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1676 && gdbarch_bfd_arch_info (target_gdbarch ())->arch
== bfd_arch_mips
)
1678 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach
)
1680 case bfd_mach_mips4100
:
1681 case bfd_mach_mips4300
:
1682 case bfd_mach_mips4600
:
1683 case bfd_mach_mips4650
:
1684 case bfd_mach_mips5000
:
1685 monitor_prompt
= "<RISQ> ";
1689 if (monitor_prompt
== NULL
)
1690 monitor_prompt
= "<IDT>";
1691 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1694 /* Open a connection to a PMON board. */
1697 pmon_open (char *name
, int from_tty
)
1699 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1702 /* Open a connection to a DDB board. */
1705 ddb_open (char *name
, int from_tty
)
1707 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1710 /* Open a connection to a rockhopper board. */
1713 rockhopper_open (char *name
, int from_tty
)
1715 common_open (&rockhopper_ops
, name
, from_tty
, MON_ROCKHOPPER
, "NEC01>");
1718 /* Open a connection to an LSI board. */
1721 lsi_open (char *name
, int from_tty
)
1725 /* Clear the LSI breakpoint table. */
1726 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1727 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1729 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1732 /* Close a connection to the remote board. */
1735 mips_close (struct target_ops
*self
)
1739 /* Get the board out of remote debugging mode. */
1740 (void) mips_exit_debug ();
1745 generic_mourn_inferior ();
1748 /* Detach from the remote board. */
1751 mips_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
1754 error (_("Argument given to \"detach\" when remotely debugging."));
1756 unpush_target (ops
);
1759 printf_unfiltered ("Ending remote MIPS debugging.\n");
1762 /* Tell the target board to resume. This does not wait for a reply
1763 from the board, except in the case of single-stepping on LSI boards,
1764 where PMON does return a reply. */
1767 mips_resume (struct target_ops
*ops
,
1768 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
1772 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1773 a single step, so we wait for that. */
1774 mips_request (step
? 's' : 'c', 1, siggnal
,
1775 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1776 mips_receive_wait
, NULL
);
1779 /* Return the signal corresponding to SIG, where SIG is the number which
1780 the MIPS protocol uses for the signal. */
1782 static enum gdb_signal
1783 mips_signal_from_protocol (int sig
)
1785 /* We allow a few more signals than the IDT board actually returns, on
1786 the theory that there is at least *some* hope that perhaps the numbering
1787 for these signals is widely agreed upon. */
1790 return GDB_SIGNAL_UNKNOWN
;
1792 /* Don't want to use gdb_signal_from_host because we are converting
1793 from MIPS signal numbers, not host ones. Our internal numbers
1794 match the MIPS numbers for the signals the board can return, which
1795 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1796 return (enum gdb_signal
) sig
;
1799 /* Set the register designated by REGNO to the value designated by VALUE. */
1802 mips_set_register (int regno
, ULONGEST value
)
1804 gdb_byte buf
[MAX_REGISTER_SIZE
];
1805 struct regcache
*regcache
= get_current_regcache ();
1806 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1807 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1809 /* We got the number the register holds, but gdb expects to see a
1810 value in the target byte ordering. */
1812 if (mips_monitor
!= MON_ROCKHOPPER
1813 && (regno
== mips_regnum (gdbarch
)->pc
|| regno
< 32))
1814 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1815 In such cases we can only really debug 32-bit code properly so,
1816 when reading a GPR or the PC, assume that the full 64-bit
1817 value is the sign extension of the lower 32 bits. */
1818 store_signed_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1821 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1824 regcache_raw_supply (regcache
, regno
, buf
);
1827 /* Wait until the remote stops, and return a wait status. */
1830 mips_wait (struct target_ops
*ops
,
1831 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1835 char buff
[DATA_MAXLEN
];
1836 ULONGEST rpc
, rfp
, rsp
;
1837 char pc_string
[17], fp_string
[17], sp_string
[17], flags
[20];
1840 interrupt_count
= 0;
1843 /* If we have not sent a single step or continue command, then the
1844 board is waiting for us to do something. Return a status
1845 indicating that it is stopped. */
1846 if (!mips_need_reply
)
1848 status
->kind
= TARGET_WAITKIND_STOPPED
;
1849 status
->value
.sig
= GDB_SIGNAL_TRAP
;
1850 return inferior_ptid
;
1853 /* No timeout; we sit here as long as the program continues to execute. */
1855 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1858 mips_error (_("Remote failure: %s"), safe_strerror (errno
));
1860 /* On returning from a continue, the PMON monitor seems to start
1861 echoing back the messages we send prior to sending back the
1862 ACK. The code can cope with this, but to try and avoid the
1863 unnecessary serial traffic, and "spurious" characters displayed
1864 to the user, we cheat and reset the debug protocol. The problems
1865 seems to be caused by a check on the number of arguments, and the
1866 command length, within the monitor causing it to echo the command
1868 if (mips_monitor
== MON_PMON
)
1871 mips_enter_debug ();
1874 /* See if we got back extended status. If so, pick out the pc, fp,
1877 nfields
= sscanf (buff
,
1878 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1879 pc_string
, fp_string
, sp_string
, flags
);
1881 && read_hex_value (pc_string
, &rpc
)
1882 && read_hex_value (fp_string
, &rfp
)
1883 && read_hex_value (sp_string
, &rsp
))
1885 struct regcache
*regcache
= get_current_regcache ();
1886 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1888 mips_set_register (gdbarch_pc_regnum (gdbarch
), rpc
);
1889 mips_set_register (30, rfp
);
1890 mips_set_register (gdbarch_sp_regnum (gdbarch
), rsp
);
1896 for (i
= 0; i
<= 2; i
++)
1897 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1899 else if (flags
[i
] == '\000')
1904 if (strcmp (target_shortname
, "lsi") == 0)
1907 /* If this is an LSI PMON target, see if we just hit a
1908 hardrdware watchpoint. Right now, PMON doesn't give us
1909 enough information to determine which breakpoint we hit. So
1910 we have to look up the PC in our own table of breakpoints,
1911 and if found, assume it's just a normal instruction fetch
1912 breakpoint, not a data watchpoint. FIXME when PMON provides
1913 some way to tell us what type of breakpoint it is. */
1915 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1918 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1920 if (lsi_breakpoints
[i
].addr
== pc
1921 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1928 /* If a data breakpoint was hit, PMON returns the following packet:
1930 The return packet from an ordinary breakpoint doesn't have the
1931 extra 0x01 field tacked onto the end. */
1932 if (nfields
== 1 && rpc
== 1)
1937 /* NOTE: The following (sig) numbers are defined by PMON:
1938 SPP_SIGTRAP 5 breakpoint
1946 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1947 and so on, because the constants we want here are determined by the
1948 MIPS protocol and have nothing to do with what host we are running on. */
1949 if ((rstatus
& 0xff) == 0)
1951 status
->kind
= TARGET_WAITKIND_EXITED
;
1952 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1954 else if ((rstatus
& 0xff) == 0x7f)
1956 status
->kind
= TARGET_WAITKIND_STOPPED
;
1957 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1959 /* If the stop PC is in the _exit function, assume
1960 we hit the 'break 0x3ff' instruction in _exit, so this
1961 is not a normal breakpoint. */
1962 if (strcmp (target_shortname
, "lsi") == 0)
1964 const char *func_name
;
1965 CORE_ADDR func_start
;
1966 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1968 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1969 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1970 && func_start
== pc
)
1971 status
->kind
= TARGET_WAITKIND_EXITED
;
1976 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1977 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1980 return inferior_ptid
;
1983 /* We have to map between the register numbers used by gdb and the
1984 register numbers used by the debugging protocol. */
1986 #define REGNO_OFFSET 96
1989 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1993 if (regno
>= mips_regnum (gdbarch
)->fp0
1994 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1995 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1996 else if (regno
== mips_regnum (gdbarch
)->pc
)
1997 return REGNO_OFFSET
+ 0;
1998 else if (regno
== mips_regnum (gdbarch
)->cause
)
1999 return REGNO_OFFSET
+ 1;
2000 else if (regno
== mips_regnum (gdbarch
)->hi
)
2001 return REGNO_OFFSET
+ 2;
2002 else if (regno
== mips_regnum (gdbarch
)->lo
)
2003 return REGNO_OFFSET
+ 3;
2004 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
2005 return REGNO_OFFSET
+ 4;
2006 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
2007 return REGNO_OFFSET
+ 5;
2009 /* FIXME: Is there a way to get the status register? */
2013 /* Fetch the remote registers. */
2016 mips_fetch_registers (struct target_ops
*ops
,
2017 struct regcache
*regcache
, int regno
)
2019 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2020 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2026 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2027 mips_fetch_registers (ops
, regcache
, regno
);
2031 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
2032 || regno
== MIPS_ZERO_REGNUM
)
2033 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2034 supposed to read zero (see also mips-nat.c). */
2038 /* If PMON doesn't support this register, don't waste serial
2039 bandwidth trying to read it. */
2040 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
2042 if (regno
!= 0 && pmon_reg
== 0)
2046 /* Unfortunately the PMON version in the Vr4300 board has been
2047 compiled without the 64bit register access commands. This
2048 means we cannot get hold of the full register width. */
2049 if (mips_monitor
== MON_DDB
|| mips_monitor
== MON_ROCKHOPPER
)
2050 val
= mips_request ('t', pmon_reg
, 0,
2051 &err
, mips_receive_wait
, NULL
);
2053 val
= mips_request ('r', pmon_reg
, 0,
2054 &err
, mips_receive_wait
, NULL
);
2056 mips_error (_("Can't read register %d: %s"), regno
,
2057 safe_strerror (errno
));
2061 mips_set_register (regno
, val
);
2064 /* Prepare to store registers. The MIPS protocol can store individual
2065 registers, so this function doesn't have to do anything. */
2068 mips_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
2072 /* Store remote register(s). */
2075 mips_store_registers (struct target_ops
*ops
,
2076 struct regcache
*regcache
, int regno
)
2078 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2084 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2085 mips_store_registers (ops
, regcache
, regno
);
2089 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
2090 mips_request (mips_monitor
== MON_ROCKHOPPER
? 'T' : 'R',
2091 mips_map_regno (gdbarch
, regno
),
2093 &err
, mips_receive_wait
, NULL
);
2095 mips_error (_("Can't write register %d: %s"), regno
,
2096 safe_strerror (errno
));
2099 /* Fetch a word from the target board. Return word fetched in location
2100 addressed by VALP. Return 0 when successful; return positive error
2104 mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
)
2108 *valp
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2111 /* Data space failed; try instruction space. */
2112 *valp
= mips_request ('i', addr
, 0, &err
,
2113 mips_receive_wait
, NULL
);
2118 /* Store a word to the target board. Returns errno code or zero for
2119 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2120 memory location there. */
2122 /* FIXME! make sure only 32-bit quantities get stored! */
2124 mips_store_word (CORE_ADDR addr
, unsigned int val
, int *old_contents
)
2127 unsigned int oldcontents
;
2129 oldcontents
= mips_request ('D', addr
, val
, &err
,
2130 mips_receive_wait
, NULL
);
2133 /* Data space failed; try instruction space. */
2134 oldcontents
= mips_request ('I', addr
, val
, &err
,
2135 mips_receive_wait
, NULL
);
2139 if (old_contents
!= NULL
)
2140 *old_contents
= oldcontents
;
2144 /* Read or write LEN bytes from inferior memory at MEMADDR,
2145 transferring to or from debugger address MYADDR. Write to inferior
2146 if SHOULD_WRITE is nonzero. Returns length of data written or
2147 read; 0 for error. Note that protocol gives us the correct value
2148 for a longword, since it transfers values in ASCII. We want the
2149 byte values, so we have to swap the longword values. */
2151 static int mask_address_p
= 1;
2154 mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
, int write
,
2155 struct mem_attrib
*attrib
, struct target_ops
*target
)
2157 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch ());
2164 /* PMON targets do not cope well with 64 bit addresses. Mask the
2165 value down to 32 bits. */
2167 memaddr
&= (CORE_ADDR
) 0xffffffff;
2169 /* Round starting address down to longword boundary. */
2170 addr
= memaddr
& ~3;
2171 /* Round ending address up; get number of longwords that makes. */
2172 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2173 /* Allocate buffer of that many longwords. */
2174 buffer
= alloca (count
* 4);
2178 /* Fill start and end extra bytes of buffer with existing data. */
2179 if (addr
!= memaddr
|| len
< 4)
2183 if (mips_fetch_word (addr
, &val
))
2186 /* Need part of initial word -- fetch it. */
2187 store_unsigned_integer (&buffer
[0], 4, byte_order
, val
);
2194 /* Need part of last word -- fetch it. FIXME: we do this even
2195 if we don't need it. */
2196 if (mips_fetch_word (addr
+ (count
- 1) * 4, &val
))
2199 store_unsigned_integer (&buffer
[(count
- 1) * 4],
2200 4, byte_order
, val
);
2203 /* Copy data to be written over corresponding part of buffer. */
2205 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2207 /* Write the entire buffer. */
2209 for (i
= 0; i
< count
; i
++, addr
+= 4)
2213 word
= extract_unsigned_integer (&buffer
[i
* 4], 4, byte_order
);
2214 status
= mips_store_word (addr
, word
, NULL
);
2215 /* Report each kilobyte (we download 32-bit words at a time). */
2218 printf_unfiltered ("*");
2219 gdb_flush (gdb_stdout
);
2226 /* FIXME: Do we want a QUIT here? */
2229 printf_unfiltered ("\n");
2233 /* Read all the longwords. */
2234 for (i
= 0; i
< count
; i
++, addr
+= 4)
2238 if (mips_fetch_word (addr
, &val
))
2241 store_unsigned_integer (&buffer
[i
* 4], 4, byte_order
, val
);
2245 /* Copy appropriate bytes out of the buffer. */
2246 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2251 /* Print info on this target. */
2254 mips_files_info (struct target_ops
*ignore
)
2256 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2259 /* Kill the process running on the board. This will actually only
2260 work if we are doing remote debugging over the console input. I
2261 think that if IDT/sim had the remote debug interrupt enabled on the
2262 right port, we could interrupt the process with a break signal. */
2265 mips_kill (struct target_ops
*ops
)
2267 if (!mips_wait_flag
)
2269 target_mourn_inferior ();
2275 if (interrupt_count
>= 2)
2277 interrupt_count
= 0;
2279 target_terminal_ours ();
2281 if (query (_("Interrupted while waiting for the program.\n\
2282 Give up (and stop debugging it)? ")))
2284 /* Clean up in such a way that mips_close won't try to talk
2285 to the board (it almost surely won't work since we
2286 weren't able to talk to it). */
2290 printf_unfiltered ("Ending remote MIPS debugging.\n");
2291 target_mourn_inferior ();
2295 target_terminal_inferior ();
2298 if (remote_debug
> 0)
2299 printf_unfiltered ("Sending break\n");
2301 serial_send_break (mips_desc
);
2303 target_mourn_inferior ();
2312 serial_write (mips_desc
, &cc
, 1);
2314 target_mourn_inferior ();
2319 /* Start running on the target board. */
2322 mips_create_inferior (struct target_ops
*ops
, char *execfile
,
2323 char *args
, char **env
, int from_tty
)
2330 Can't pass arguments to remote MIPS board; arguments ignored."));
2331 /* And don't try to use them on the next "run" command. */
2332 execute_command ("set args", 0);
2335 if (execfile
== 0 || exec_bfd
== 0)
2336 error (_("No executable file specified"));
2338 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2340 init_wait_for_inferior ();
2342 regcache_write_pc (get_current_regcache (), entry_pt
);
2345 /* Clean up after a process. The bulk of the work is done in mips_close(),
2346 which is called when unpushing the target. */
2349 mips_mourn_inferior (struct target_ops
*ops
)
2351 if (current_ops
!= NULL
)
2352 unpush_target (current_ops
);
2355 /* We can write a breakpoint and read the shadow contents in one
2358 /* Insert a breakpoint. On targets that don't have built-in
2359 breakpoint support, we read the contents of the target location and
2360 stash it, then overwrite it with a breakpoint instruction. ADDR is
2361 the target location in the target machine. BPT is the breakpoint
2362 being inserted or removed, which contains memory for saving the
2366 mips_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2367 struct bp_target_info
*bp_tgt
)
2369 if (monitor_supports_breakpoints
)
2370 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2373 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
2376 /* Remove a breakpoint. */
2379 mips_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2380 struct bp_target_info
*bp_tgt
)
2382 if (monitor_supports_breakpoints
)
2383 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2386 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
);
2389 /* Tell whether this target can support a hardware breakpoint. CNT
2390 is the number of hardware breakpoints already installed. This
2391 implements the target_can_use_hardware_watchpoint macro. */
2394 mips_can_use_watchpoint (struct target_ops
*self
,
2395 int type
, int cnt
, int othertype
)
2397 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2401 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2402 This is used for memory ref breakpoints. */
2404 static unsigned long
2405 calculate_mask (CORE_ADDR addr
, int len
)
2410 mask
= addr
^ (addr
+ len
- 1);
2412 for (i
= 32; i
>= 0; i
--)
2418 mask
= (unsigned long) 0xffffffff >> i
;
2424 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2425 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2429 mips_insert_watchpoint (struct target_ops
*self
,
2430 CORE_ADDR addr
, int len
, int type
,
2431 struct expression
*cond
)
2433 if (mips_set_breakpoint (addr
, len
, type
))
2439 /* Remove a watchpoint. */
2442 mips_remove_watchpoint (struct target_ops
*self
,
2443 CORE_ADDR addr
, int len
, int type
,
2444 struct expression
*cond
)
2446 if (mips_clear_breakpoint (addr
, len
, type
))
2452 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2456 mips_stopped_by_watchpoint (struct target_ops
*ops
)
2458 return hit_watchpoint
;
2462 /* Insert a breakpoint. */
2465 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2467 return mips_common_breakpoint (1, addr
, len
, type
);
2471 /* Clear a breakpoint. */
2474 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2476 return mips_common_breakpoint (0, addr
, len
, type
);
2480 /* Check the error code from the return packet for an LSI breakpoint
2481 command. If there's no error, just return 0. If it's a warning,
2482 print the warning text and return 0. If it's an error, print
2483 the error text and return 1. <ADDR> is the address of the breakpoint
2484 that was being set. <RERRFLG> is the error code returned by PMON.
2485 This is a helper function for mips_common_breakpoint. */
2488 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2490 struct lsi_error
*err
;
2491 const char *saddr
= paddress (target_gdbarch (), addr
);
2493 if (rerrflg
== 0) /* no error */
2496 /* Warnings can be ORed together, so check them all. */
2497 if (rerrflg
& W_WARN
)
2499 if (monitor_warnings
)
2503 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2505 if ((err
->code
& rerrflg
) == err
->code
)
2508 fprintf_unfiltered (gdb_stderr
, "\
2509 mips_common_breakpoint (%s): Warning: %s\n",
2515 fprintf_unfiltered (gdb_stderr
, "\
2516 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2523 /* Errors are unique, i.e. can't be ORed together. */
2524 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2526 if ((err
->code
& rerrflg
) == err
->code
)
2528 fprintf_unfiltered (gdb_stderr
, "\
2529 mips_common_breakpoint (%s): Error: %s\n",
2535 fprintf_unfiltered (gdb_stderr
, "\
2536 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2543 /* This routine sends a breakpoint command to the remote target.
2545 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2546 <ADDR> is the address of the breakpoint.
2547 <LEN> the length of the region to break on.
2548 <TYPE> is the type of breakpoint:
2549 0 = write (BREAK_WRITE)
2550 1 = read (BREAK_READ)
2551 2 = read/write (BREAK_ACCESS)
2552 3 = instruction fetch (BREAK_FETCH)
2554 Return 0 if successful; otherwise 1. */
2557 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2559 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
2560 char buf
[DATA_MAXLEN
+ 1];
2562 int rpid
, rerrflg
, rresponse
, rlen
;
2565 addr
= gdbarch_addr_bits_remove (target_gdbarch (), addr
);
2567 if (mips_monitor
== MON_LSI
)
2569 if (set
== 0) /* clear breakpoint */
2571 /* The LSI PMON "clear breakpoint" has this form:
2572 <pid> 'b' <bptn> 0x0
2574 <pid> 'b' 0x0 <code>
2576 <bptn> is a breakpoint number returned by an earlier 'B' command.
2577 Possible return codes: OK, E_BPT. */
2581 /* Search for the breakpoint in the table. */
2582 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2583 if (lsi_breakpoints
[i
].type
== type
2584 && lsi_breakpoints
[i
].addr
== addr
2585 && lsi_breakpoints
[i
].len
== len
)
2588 /* Clear the table entry and tell PMON to clear the breakpoint. */
2589 if (i
== MAX_LSI_BREAKPOINTS
)
2592 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2593 paddress (target_gdbarch (), addr
));
2597 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2598 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2599 mips_send_packet (buf
, 1);
2601 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2604 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2606 mips_error (_("mips_common_breakpoint: "
2607 "Bad response from remote board: %s"),
2610 return (mips_check_lsi_error (addr
, rerrflg
));
2613 /* set a breakpoint */
2615 /* The LSI PMON "set breakpoint" command has this form:
2616 <pid> 'B' <addr> 0x0
2618 <pid> 'B' <bptn> <code>
2620 The "set data breakpoint" command has this form:
2622 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2624 where: type= "0x1" = read
2626 "0x3" = access (read or write)
2628 The reply returns two values:
2629 bptn - a breakpoint number, which is a small integer with
2630 possible values of zero through 255.
2631 code - an error return code, a value of zero indicates a
2632 succesful completion, other values indicate various
2633 errors and warnings.
2635 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2637 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2640 sprintf (buf
, "0x0 B 0x%s 0x0", phex_nz (addr
, addr_size
));
2646 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s",
2647 phex_nz (addr
, addr_size
),
2648 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2649 phex_nz (addr
+ len
- 1, addr_size
));
2651 mips_send_packet (buf
, 1);
2653 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2656 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2657 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2658 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2659 mips_error (_("mips_common_breakpoint: "
2660 "Bad response from remote board: %s"),
2664 if (mips_check_lsi_error (addr
, rerrflg
))
2667 /* rresponse contains PMON's breakpoint number. Record the
2668 information for this breakpoint so we can clear it later. */
2669 lsi_breakpoints
[rresponse
].type
= type
;
2670 lsi_breakpoints
[rresponse
].addr
= addr
;
2671 lsi_breakpoints
[rresponse
].len
= len
;
2678 /* On non-LSI targets, the breakpoint command has this form:
2679 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2680 <MASK> is a don't care mask for addresses.
2681 <FLAGS> is any combination of `r', `w', or `f' for
2682 read/write/fetch. */
2686 mask
= calculate_mask (addr
, len
);
2689 if (set
) /* set a breakpoint */
2695 case BREAK_WRITE
: /* write */
2698 case BREAK_READ
: /* read */
2701 case BREAK_ACCESS
: /* read/write */
2704 case BREAK_FETCH
: /* fetch */
2708 internal_error (__FILE__
, __LINE__
,
2709 _("failed internal consistency check"));
2713 sprintf (buf
, "0x0 B 0x%s 0x%s %s", phex_nz (addr
, addr_size
),
2714 phex_nz (mask
, addr_size
), flags
);
2719 sprintf (buf
, "0x0 b 0x%s", phex_nz (addr
, addr_size
));
2722 mips_send_packet (buf
, 1);
2724 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2727 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2728 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2730 if (nfields
!= 4 || rcmd
!= cmd
)
2731 mips_error (_("mips_common_breakpoint: "
2732 "Bad response from remote board: %s"),
2737 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2738 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2739 if (mips_monitor
== MON_DDB
)
2740 rresponse
= rerrflg
;
2741 if (rresponse
!= 22) /* invalid argument */
2742 fprintf_unfiltered (gdb_stderr
, "\
2743 mips_common_breakpoint (%s): Got error: 0x%x\n",
2744 paddress (target_gdbarch (), addr
), rresponse
);
2751 /* Send one S record as specified by SREC of length LEN, starting
2752 at ADDR. Note, however, that ADDR is not used except to provide
2753 a useful message to the user in the event that a NACK is received
2757 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2763 serial_write (mips_desc
, srec
, len
);
2765 ch
= mips_readchar (remote_timeout
);
2769 case SERIAL_TIMEOUT
:
2770 error (_("Timeout during download."));
2774 case 0x15: /* NACK */
2775 fprintf_unfiltered (gdb_stderr
,
2776 "Download got a NACK at byte %s! Retrying.\n",
2777 paddress (target_gdbarch (), addr
));
2780 error (_("Download got unexpected ack char: 0x%x, retrying."),
2786 /* Download a binary file by converting it to S records. */
2789 mips_load_srec (char *args
)
2796 unsigned int srec_frame
= 200;
2798 struct cleanup
*cleanup
;
2799 static int hashmark
= 1;
2801 buffer
= alloca (srec_frame
* 2 + 256);
2803 abfd
= gdb_bfd_open (args
, NULL
, -1);
2806 printf_filtered ("Unable to open file %s\n", args
);
2810 cleanup
= make_cleanup_bfd_unref (abfd
);
2811 if (bfd_check_format (abfd
, bfd_object
) == 0)
2813 printf_filtered ("File is not an object file\n");
2814 do_cleanups (cleanup
);
2818 /* This actually causes a download in the IDT binary format: */
2819 mips_send_command (LOAD_CMD
, 0);
2821 for (s
= abfd
->sections
; s
; s
= s
->next
)
2823 if (s
->flags
& SEC_LOAD
)
2825 unsigned int numbytes
;
2827 /* FIXME! vma too small????? */
2828 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2830 (long) (s
->vma
+ bfd_get_section_size (s
)));
2831 gdb_flush (gdb_stdout
);
2833 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2835 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2837 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2839 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2841 send_srec (srec
, reclen
, s
->vma
+ i
);
2843 if (deprecated_ui_load_progress_hook
)
2844 deprecated_ui_load_progress_hook (s
->name
, i
);
2848 putchar_unfiltered ('#');
2849 gdb_flush (gdb_stdout
);
2852 } /* Per-packet (or S-record) loop */
2854 putchar_unfiltered ('\n');
2855 } /* Loadable sections */
2858 putchar_unfiltered ('\n');
2860 /* Write a type 7 terminator record. no data for a type 7, and there
2861 is no data, so len is 0. */
2863 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2865 send_srec (srec
, reclen
, abfd
->start_address
);
2867 serial_flush_input (mips_desc
);
2868 do_cleanups (cleanup
);
2872 * mips_make_srec -- make an srecord. This writes each line, one at a
2873 * time, each with it's own header and trailer line.
2874 * An srecord looks like this:
2876 * byte count-+ address
2877 * start ---+ | | data +- checksum
2879 * S01000006F6B692D746573742E73726563E4
2880 * S315000448600000000000000000FC00005900000000E9
2881 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2882 * S30B0004485A0000000000004E
2885 * S<type><length><address><data><checksum>
2889 * is the number of bytes following upto the checksum. Note that
2890 * this is not the number of chars following, since it takes two
2891 * chars to represent a byte.
2895 * 1) two byte address data record
2896 * 2) three byte address data record
2897 * 3) four byte address data record
2898 * 7) four byte address termination record
2899 * 8) three byte address termination record
2900 * 9) two byte address termination record
2903 * is the start address of the data following, or in the case of
2904 * a termination record, the start address of the image
2908 * is the sum of all the raw byte data in the record, from the length
2909 * upwards, modulo 256 and subtracted from 255.
2911 * This routine returns the length of the S-record.
2916 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2919 unsigned char checksum
;
2922 /* Create the header for the srec. addr_size is the number of bytes
2923 in the address, and 1 is the number of bytes in the count. */
2925 /* FIXME!! bigger buf required for 64-bit! */
2928 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2929 /* This assumes S3 style downloads (4byte addresses). There should
2930 probably be a check, or the code changed to make it more
2932 buf
[3] = memaddr
>> 24;
2933 buf
[4] = memaddr
>> 16;
2934 buf
[5] = memaddr
>> 8;
2936 memcpy (&buf
[7], myaddr
, len
);
2938 /* Note that the checksum is calculated on the raw data, not the
2939 hexified data. It includes the length, address and the data
2940 portions of the packet. */
2942 buf
+= 2; /* Point at length byte. */
2943 for (i
= 0; i
< len
+ 4 + 1; i
++)
2951 /* The following manifest controls whether we enable the simple flow
2952 control support provided by the monitor. If enabled the code will
2953 wait for an affirmative ACK between transmitting packets. */
2954 #define DOETXACK (1)
2956 /* The PMON fast-download uses an encoded packet format constructed of
2957 3byte data packets (encoded as 4 printable ASCII characters), and
2958 escape sequences (preceded by a '/'):
2961 'C' compare checksum (12bit value, not included in checksum calculation)
2962 'S' define symbol name (for addr) terminated with ","
2963 and padded to 4char boundary
2964 'Z' zero fill multiple of 3bytes
2965 'B' byte (12bit encoded value, of 8bit data)
2966 'A' address (36bit encoded value)
2967 'E' define entry as original address, and exit load
2969 The packets are processed in 4 character chunks, so the escape
2970 sequences that do not have any data (or variable length data)
2971 should be padded to a 4 character boundary. The decoder will give
2972 an error if the complete message block size is not a multiple of
2973 4bytes (size of record).
2975 The encoding of numbers is done in 6bit fields. The 6bit value is
2976 used to index into this string to get the specific character
2977 encoding for the value: */
2978 static char encoding
[] =
2979 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2981 /* Convert the number of bits required into an encoded number, 6bits
2982 at a time (range 0..63). Keep a checksum if required (passed
2983 pointer non-NULL). The function returns the number of encoded
2984 characters written into the buffer. */
2987 pmon_makeb64 (unsigned long v
, char *p
, int n
, unsigned int *chksum
)
2989 int count
= (n
/ 6);
2993 fprintf_unfiltered (gdb_stderr
,
2994 "Fast encoding bitcount must be a "
2995 "multiple of 12bits: %dbit%s\n",
2996 n
, (n
== 1) ? "" : "s");
3001 fprintf_unfiltered (gdb_stderr
,
3002 "Fast encoding cannot process more "
3003 "than 36bits at the moment: %dbits\n", n
);
3007 /* Deal with the checksum: */
3013 *chksum
+= ((v
>> 24) & 0xFFF);
3015 *chksum
+= ((v
>> 12) & 0xFFF);
3017 *chksum
+= ((v
>> 0) & 0xFFF);
3024 *p
++ = encoding
[(v
>> n
) & 0x3F];
3031 /* Shorthand function (that could be in-lined) to output the zero-fill
3032 escape sequence into the data stream. */
3035 pmon_zeroset (int recsize
, char **buff
,
3036 unsigned int *amount
, unsigned int *chksum
)
3040 sprintf (*buff
, "/Z");
3041 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3042 *buff
+= (count
+ 2);
3044 return (recsize
+ count
+ 2);
3047 /* Add the checksum specified by *VALUE to end of the record under
3048 construction. *BUF specifies the location at which to begin
3049 writing characters comprising the checksum information. RECSIZE
3050 specifies the size of the record constructed thus far. (A trailing
3051 NUL character may be present in the buffer holding the record, but
3052 the record size does not include this character.)
3054 Return the total size of the record after adding the checksum escape,
3055 the checksum itself, and the trailing newline.
3057 The checksum specified by *VALUE is zeroed out prior to returning.
3058 Additionally, *BUF is updated to refer to the location just beyond
3059 the record elements added by this call. */
3062 pmon_checkset (int recsize
, char **buff
, unsigned int *value
)
3066 /* Add the checksum (without updating the value): */
3067 sprintf (*buff
, "/C");
3068 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3069 *buff
+= (count
+ 2);
3070 sprintf (*buff
, "\n");
3071 *buff
+= 2; /* Include zero terminator. */
3072 /* Forcing a checksum validation clears the sum: */
3074 return (recsize
+ count
+ 3);
3077 /* Amount of padding we leave after at the end of the output buffer,
3078 for the checksum and line termination characters: */
3079 #define CHECKSIZE (4 + 4 + 4 + 2)
3080 /* zero-fill, checksum, transfer end and line termination space. */
3082 /* The amount of binary data loaded from the object file in a single
3084 #define BINCHUNK (1024)
3086 /* Maximum line of data accepted by the monitor: */
3087 #define MAXRECSIZE (550)
3088 /* NOTE: This constant depends on the monitor being used. This value
3089 is for PMON 5.x on the Cogent Vr4300 board. */
3091 /* Create a FastLoad format record.
3093 *OUTBUF is the buffer into which a FastLoad formatted record is
3094 written. On return, the pointer position represented by *OUTBUF
3095 is updated to point at the end of the data, i.e. the next position
3096 in the buffer that may be written. No attempt is made to NUL-
3097 terminate this portion of the record written to the buffer.
3099 INBUF contains the binary input data from which the FastLoad
3100 formatted record will be built. *INPTR is an index into this
3101 buffer. *INPTR is updated as the input is consumed. Thus, on
3102 return, the caller has access to the position of the next input
3103 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3106 *RECSIZE will be written with the size of the record written to the
3107 output buffer prior to returning. This size does not include a
3108 NUL-termination byte as none is written to the output buffer.
3110 *CSUM is the output buffer checksum. It is updated as data is
3111 written to the output buffer.
3113 *ZEROFILL is the current number of 3-byte zero sequences that have
3114 been encountered. It is both an input and an output to this
3118 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3119 int inamount
, int *recsize
, unsigned int *csum
,
3120 unsigned int *zerofill
)
3125 /* This is a simple check to ensure that our data will fit within
3126 the maximum allowable record size. Each record output is 4bytes
3127 in length. We must allow space for a pending zero fill command,
3128 the record, and a checksum record. */
3129 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3131 /* Process the binary data: */
3132 if ((inamount
- *inptr
) < 3)
3135 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3137 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3139 *recsize
+= (2 + count
);
3144 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16)
3145 | (inbuf
[*inptr
+ 1] << 8)
3146 | (inbuf
[*inptr
+ 2]));
3148 /* Simple check for zero data. TODO: A better check would be
3149 to check the last, and then the middle byte for being zero
3150 (if the first byte is not). We could then check for
3151 following runs of zeros, and if above a certain size it is
3152 worth the 4 or 8 character hit of the byte insertions used
3153 to pad to the start of the zeroes. NOTE: This also depends
3154 on the alignment at the end of the zero run. */
3155 if (value
== 0x00000000)
3158 if (*zerofill
== 0xFFF) /* 12bit counter */
3159 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3164 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3165 count
= pmon_makeb64 (value
, p
, 24, csum
);
3177 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3178 output the message specified by MESG. Return -1 for failure, 0
3182 pmon_check_ack (char *mesg
)
3184 #if defined(DOETXACK)
3189 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
3191 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3193 fprintf_unfiltered (gdb_stderr
,
3194 "Failed to receive valid ACK for %s\n", mesg
);
3195 return (-1); /* Terminate the download. */
3198 #endif /* DOETXACK */
3202 /* pmon_download - Send a sequence of characters to the PMON download port,
3203 which is either a serial port or a UDP socket. */
3206 pmon_start_download (void)
3210 /* Create the temporary download file. */
3211 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3212 perror_with_name (tftp_localname
);
3216 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3217 mips_expect ("Downloading from ");
3218 mips_expect (udp_in_use
? "udp" : "tty0");
3219 mips_expect (", ^C to abort\r\n");
3223 /* Look for the string specified by STRING sent from the target board
3224 during a download operation. If the string in question is not
3225 seen, output an error message, remove the temporary file, if
3226 appropriate, and return 0. Otherwise, return 1 to indicate
3230 mips_expect_download (char *string
)
3232 if (!mips_expect (string
))
3234 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3236 remove (tftp_localname
); /* Remove temporary file. */
3243 /* Look for messages from the target board associated with the entry
3246 NOTE: This function doesn't indicate success or failure, so we
3247 have no way to determine whether or not the output from the board
3248 was correctly seen. However, given that other items are checked
3249 after this, it seems unlikely that those checks will pass if this
3250 check doesn't first (silently) pass. */
3253 pmon_check_entry_address (char *entry_address
, int final
)
3255 char hexnumber
[9]; /* Includes '\0' space. */
3257 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3258 sprintf (hexnumber
, "%x", final
);
3259 mips_expect (hexnumber
);
3260 mips_expect ("\r\n");
3263 /* Look for messages from the target board showing the total number of
3264 bytes downloaded to the board. Output 1 for success if the tail
3265 end of the message was read correctly, 0 otherwise. */
3268 pmon_check_total (int bintotal
)
3270 char hexnumber
[9]; /* Includes '\0' space. */
3272 mips_expect ("\r\ntotal = 0x");
3273 sprintf (hexnumber
, "%x", bintotal
);
3274 mips_expect (hexnumber
);
3275 return mips_expect_download (" bytes\r\n");
3278 /* Look for the termination messages associated with the end of
3279 a download to the board.
3281 Also, when `tftp_in_use' is set, issue the load command to the
3282 board causing the file to be transferred. (This is done prior
3283 to looking for the above mentioned termination messages.) */
3286 pmon_end_download (int final
, int bintotal
)
3288 char hexnumber
[9]; /* Includes '\0' space. */
3292 static char *load_cmd_prefix
= "load -b -s ";
3296 /* Close off the temporary file containing the load data. */
3300 /* Make the temporary file readable by the world. */
3301 if (stat (tftp_localname
, &stbuf
) == 0)
3302 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3304 /* Must reinitialize the board to prevent PMON from crashing. */
3305 if (mips_monitor
!= MON_ROCKHOPPER
)
3306 mips_send_command ("initEther\r", -1);
3308 /* Send the load command. */
3309 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3310 strcpy (cmd
, load_cmd_prefix
);
3311 strcat (cmd
, tftp_name
);
3313 mips_send_command (cmd
, 0);
3315 if (!mips_expect_download ("Downloading from "))
3317 if (!mips_expect_download (tftp_name
))
3319 if (!mips_expect_download (", ^C to abort\r\n"))
3323 /* Wait for the stuff that PMON prints after the load has completed.
3324 The timeout value for use in the tftp case (15 seconds) was picked
3325 arbitrarily but might be too small for really large downloads. FIXME. */
3326 switch (mips_monitor
)
3329 pmon_check_ack ("termination");
3330 pmon_check_entry_address ("Entry address is ", final
);
3331 if (!pmon_check_total (bintotal
))
3334 case MON_ROCKHOPPER
:
3335 if (!pmon_check_total (bintotal
))
3337 pmon_check_entry_address ("Entry Address = ", final
);
3340 pmon_check_entry_address ("Entry Address = ", final
);
3341 pmon_check_ack ("termination");
3342 if (!pmon_check_total (bintotal
))
3348 remove (tftp_localname
); /* Remove temporary file. */
3351 /* Write the buffer specified by BUFFER of length LENGTH to either
3352 the board or the temporary file that'll eventually be transferred
3356 pmon_download (char *buffer
, int length
)
3362 written
= fwrite (buffer
, 1, length
, tftp_file
);
3363 if (written
< length
)
3364 perror_with_name (tftp_localname
);
3367 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3370 /* Open object or executable file, FILE, and send it to the board
3371 using the FastLoad format. */
3374 pmon_load_fast (char *file
)
3378 unsigned char *binbuf
;
3381 unsigned int csum
= 0;
3382 int hashmark
= !tftp_in_use
;
3386 struct cleanup
*cleanup
;
3388 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3389 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3391 abfd
= gdb_bfd_open (file
, NULL
, -1);
3394 printf_filtered ("Unable to open file %s\n", file
);
3397 cleanup
= make_cleanup_bfd_unref (abfd
);
3399 if (bfd_check_format (abfd
, bfd_object
) == 0)
3401 printf_filtered ("File is not an object file\n");
3402 do_cleanups (cleanup
);
3406 /* Setup the required download state: */
3407 mips_send_command ("set dlproto etxack\r", -1);
3408 mips_send_command ("set dlecho off\r", -1);
3409 /* NOTE: We get a "cannot set variable" message if the variable is
3410 already defined to have the argument we give. The code doesn't
3411 care, since it just scans to the next prompt anyway. */
3412 /* Start the download: */
3413 pmon_start_download ();
3415 /* Zero the checksum. */
3416 sprintf (buffer
, "/Kxx\n");
3417 reclen
= strlen (buffer
);
3418 pmon_download (buffer
, reclen
);
3419 finished
= pmon_check_ack ("/Kxx");
3421 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3422 if (s
->flags
& SEC_LOAD
) /* Only deal with loadable sections. */
3424 bintotal
+= bfd_get_section_size (s
);
3425 final
= (s
->vma
+ bfd_get_section_size (s
));
3427 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
,
3428 (unsigned int) s
->vma
,
3429 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3430 gdb_flush (gdb_stdout
);
3432 /* Output the starting address. */
3433 sprintf (buffer
, "/A");
3434 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3435 buffer
[2 + reclen
] = '\n';
3436 buffer
[3 + reclen
] = '\0';
3437 reclen
+= 3; /* For the initial escape code and carriage return. */
3438 pmon_download (buffer
, reclen
);
3439 finished
= pmon_check_ack ("/A");
3443 unsigned int binamount
;
3444 unsigned int zerofill
= 0;
3451 i
< bfd_get_section_size (s
) && !finished
;
3456 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3458 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3460 /* This keeps a rolling checksum, until we decide to output
3462 for (; ((binamount
- binptr
) > 0);)
3464 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3465 &reclen
, &csum
, &zerofill
);
3466 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3468 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3469 pmon_download (buffer
, reclen
);
3470 finished
= pmon_check_ack ("data record");
3473 zerofill
= 0; /* Do not transmit pending
3478 if (deprecated_ui_load_progress_hook
)
3479 deprecated_ui_load_progress_hook (s
->name
, i
);
3483 putchar_unfiltered ('#');
3484 gdb_flush (gdb_stdout
);
3488 reclen
= 0; /* buffer processed */
3493 /* Ensure no out-standing zerofill requests: */
3495 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3497 /* and then flush the line: */
3500 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3501 /* Currently pmon_checkset outputs the line terminator by
3502 default, so we write out the buffer so far: */
3503 pmon_download (buffer
, reclen
);
3504 finished
= pmon_check_ack ("record remnant");
3508 putchar_unfiltered ('\n');
3511 /* Terminate the transfer. We know that we have an empty output
3512 buffer at this point. */
3513 sprintf (buffer
, "/E/E\n"); /* Include dummy padding characters. */
3514 reclen
= strlen (buffer
);
3515 pmon_download (buffer
, reclen
);
3518 { /* Ignore the termination message: */
3519 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3522 { /* Deal with termination message: */
3523 pmon_end_download (final
, bintotal
);
3526 do_cleanups (cleanup
);
3530 /* mips_load -- download a file. */
3533 mips_load (struct target_ops
*self
, char *file
, int from_tty
)
3535 struct regcache
*regcache
;
3537 /* Get the board out of remote debugging mode. */
3538 if (mips_exit_debug ())
3539 error (_("mips_load: Couldn't get into monitor mode."));
3541 if (mips_monitor
!= MON_IDT
)
3542 pmon_load_fast (file
);
3544 mips_load_srec (file
);
3548 /* Finally, make the PC point at the start address. */
3549 regcache
= get_current_regcache ();
3550 if (mips_monitor
!= MON_IDT
)
3552 /* Work around problem where PMON monitor updates the PC after a load
3553 to a different value than GDB thinks it has. The following ensures
3554 that the regcache_write_pc() WILL update the PC value: */
3555 regcache_invalidate (regcache
,
3556 mips_regnum (get_regcache_arch (regcache
))->pc
);
3559 regcache_write_pc (regcache
, bfd_get_start_address (exec_bfd
));
3562 /* Check to see if a thread is still alive. */
3565 mips_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
3567 if (ptid_equal (ptid
, remote_mips_ptid
))
3568 /* The monitor's task is always alive. */
3574 /* Convert a thread ID to a string. Returns the string in a static
3578 mips_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3580 static char buf
[64];
3582 if (ptid_equal (ptid
, remote_mips_ptid
))
3584 xsnprintf (buf
, sizeof buf
, "Thread <main>");
3588 return normal_pid_to_str (ptid
);
3591 /* Pass the command argument as a packet to PMON verbatim. */
3594 pmon_command (char *args
, int from_tty
)
3596 char buf
[DATA_MAXLEN
+ 1];
3599 sprintf (buf
, "0x0 %s", args
);
3600 mips_send_packet (buf
, 1);
3601 printf_filtered ("Send packet: %s\n", buf
);
3603 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3605 printf_filtered ("Received packet: %s\n", buf
);
3608 /* -Wmissing-prototypes */
3609 extern initialize_file_ftype _initialize_remote_mips
;
3611 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3612 Create target specific commands and perform other initializations
3613 specific to this file. */
3616 _initialize_remote_mips (void)
3618 /* Initialize the fields in mips_ops that are common to all four targets. */
3619 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3620 mips_ops
.to_close
= mips_close
;
3621 mips_ops
.to_detach
= mips_detach
;
3622 mips_ops
.to_resume
= mips_resume
;
3623 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3624 mips_ops
.to_store_registers
= mips_store_registers
;
3625 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3626 mips_ops
.deprecated_xfer_memory
= mips_xfer_memory
;
3627 mips_ops
.to_files_info
= mips_files_info
;
3628 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3629 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3630 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3631 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3632 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3633 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3634 mips_ops
.to_kill
= mips_kill
;
3635 mips_ops
.to_load
= mips_load
;
3636 mips_ops
.to_create_inferior
= mips_create_inferior
;
3637 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3638 mips_ops
.to_thread_alive
= mips_thread_alive
;
3639 mips_ops
.to_pid_to_str
= mips_pid_to_str
;
3640 mips_ops
.to_log_command
= serial_log_command
;
3641 mips_ops
.to_stratum
= process_stratum
;
3642 mips_ops
.to_has_all_memory
= default_child_has_all_memory
;
3643 mips_ops
.to_has_memory
= default_child_has_memory
;
3644 mips_ops
.to_has_stack
= default_child_has_stack
;
3645 mips_ops
.to_has_registers
= default_child_has_registers
;
3646 mips_ops
.to_has_execution
= default_child_has_execution
;
3647 mips_ops
.to_magic
= OPS_MAGIC
;
3649 /* Copy the common fields to all four target vectors. */
3650 rockhopper_ops
= pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3652 /* Initialize target-specific fields in the target vectors. */
3653 mips_ops
.to_shortname
= "mips";
3654 mips_ops
.to_doc
= "\
3655 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3656 The argument is the device it is connected to or, if it contains a colon,\n\
3657 HOST:PORT to access a board over a network";
3658 mips_ops
.to_open
= mips_open
;
3659 mips_ops
.to_wait
= mips_wait
;
3661 pmon_ops
.to_shortname
= "pmon";
3662 pmon_ops
.to_doc
= "\
3663 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3664 line. The argument is the device it is connected to or, if it contains a\n\
3665 colon, HOST:PORT to access a board over a network";
3666 pmon_ops
.to_open
= pmon_open
;
3667 pmon_ops
.to_wait
= mips_wait
;
3669 ddb_ops
.to_shortname
= "ddb";
3671 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3672 line. The first argument is the device it is connected to or, if it contains\n\
3673 a colon, HOST:PORT to access a board over a network. The optional second\n\
3674 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3675 TFTP downloads to the board. The optional third parameter is the local name\n\
3676 of the TFTP temporary file, if it differs from the filename seen by the board.";
3677 ddb_ops
.to_open
= ddb_open
;
3678 ddb_ops
.to_wait
= mips_wait
;
3680 rockhopper_ops
.to_shortname
= "rockhopper";
3681 rockhopper_ops
.to_doc
= ddb_ops
.to_doc
;
3682 rockhopper_ops
.to_open
= rockhopper_open
;
3683 rockhopper_ops
.to_wait
= mips_wait
;
3685 lsi_ops
.to_shortname
= "lsi";
3686 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3687 lsi_ops
.to_open
= lsi_open
;
3688 lsi_ops
.to_wait
= mips_wait
;
3690 /* Add the targets. */
3691 add_target (&mips_ops
);
3692 add_target (&pmon_ops
);
3693 add_target (&ddb_ops
);
3694 add_target (&lsi_ops
);
3695 add_target (&rockhopper_ops
);
3697 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3698 Set timeout in seconds for remote MIPS serial I/O."), _("\
3699 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3701 NULL
, /* FIXME: i18n: */
3702 &setlist
, &showlist
);
3704 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3705 &mips_retransmit_wait
, _("\
3706 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3707 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3708 This is the number of seconds to wait for an acknowledgement to a packet\n\
3709 before resending the packet."),
3711 NULL
, /* FIXME: i18n: */
3712 &setlist
, &showlist
);
3714 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3715 &mips_syn_garbage
, _("\
3716 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3717 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3718 This is the maximum number of characters GDB will ignore when trying to\n\
3719 synchronize with the remote system. A value of -1 means that there is no\n\
3720 limit. (Note that these characters are printed out even though they are\n\
3723 NULL
, /* FIXME: i18n: */
3724 &setlist
, &showlist
);
3726 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3727 &mips_monitor_prompt
, _("\
3728 Set the prompt that GDB expects from the monitor."), _("\
3729 Show the prompt that GDB expects from the monitor."), NULL
,
3731 NULL
, /* FIXME: i18n: */
3732 &setlist
, &showlist
);
3734 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3735 &monitor_warnings
, _("\
3736 Set printing of monitor warnings."), _("\
3737 Show printing of monitor warnings."), _("\
3738 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3740 NULL
, /* FIXME: i18n: */
3741 &setlist
, &showlist
);
3743 add_com ("pmon", class_obscure
, pmon_command
,
3744 _("Send a packet to PMON (must be in debug mode)."));
3746 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3747 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3748 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3749 Use \"on\" to enable the masking and \"off\" to disable it."),
3751 NULL
, /* FIXME: i18n: */
3752 &setlist
, &showlist
);
3753 remote_mips_ptid
= ptid_build (42000, 0, 42000);