1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #include "remote-utils.h"
32 #include "gdb_string.h"
35 #include <sys/types.h>
37 #ifdef ANSI_PROTOTYPES
43 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
45 #define S_IROTH S_IREAD
48 extern void mips_set_processor_type_command
PARAMS ((char *, int));
51 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
52 types passed by breakpoint.c to target_insert_watchpoint.
53 Value 3 is our own invention, and is used for ordinary instruction
54 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
63 /* Prototypes for local functions. */
65 static int mips_readchar
PARAMS ((int timeout
));
67 static int mips_receive_header
PARAMS ((unsigned char *hdr
, int *pgarbage
,
68 int ch
, int timeout
));
70 static int mips_receive_trailer
PARAMS ((unsigned char *trlr
, int *pgarbage
,
71 int *pch
, int timeout
));
73 static int mips_cksum
PARAMS ((const unsigned char *hdr
,
74 const unsigned char *data
,
77 static void mips_send_packet
PARAMS ((const char *s
, int get_ack
));
79 static void mips_send_command
PARAMS ((const char *cmd
, int prompt
));
81 static int mips_receive_packet
PARAMS ((char *buff
, int throw_error
,
84 static CORE_ADDR mips_request
PARAMS ((int cmd
, CORE_ADDR addr
,
85 CORE_ADDR data
, int *perr
, int timeout
,
88 static void mips_initialize
PARAMS ((void));
90 static void mips_open
PARAMS ((char *name
, int from_tty
));
92 static void pmon_open
PARAMS ((char *name
, int from_tty
));
94 static void ddb_open
PARAMS ((char *name
, int from_tty
));
96 static void lsi_open
PARAMS ((char *name
, int from_tty
));
98 static void mips_close
PARAMS ((int quitting
));
100 static void mips_detach
PARAMS ((char *args
, int from_tty
));
102 static void mips_resume
PARAMS ((int pid
, int step
,
103 enum target_signal siggnal
));
105 static int mips_wait
PARAMS ((int pid
, struct target_waitstatus
*status
));
107 static int mips_map_regno
PARAMS ((int regno
));
109 static void mips_fetch_registers
PARAMS ((int regno
));
111 static void mips_prepare_to_store
PARAMS ((void));
113 static void mips_store_registers
PARAMS ((int regno
));
115 static unsigned int mips_fetch_word
PARAMS ((CORE_ADDR addr
));
117 static int mips_store_word
PARAMS ((CORE_ADDR addr
, unsigned int value
,
118 char *old_contents
));
120 static int mips_xfer_memory
PARAMS ((CORE_ADDR memaddr
, char *myaddr
, int len
,
121 int write
, struct target_ops
*ignore
));
123 static void mips_files_info
PARAMS ((struct target_ops
*ignore
));
125 static void mips_create_inferior
PARAMS ((char *execfile
, char *args
,
128 static void mips_mourn_inferior
PARAMS ((void));
130 static int pmon_makeb64
PARAMS ((unsigned long v
, char *p
, int n
, int *chksum
));
132 static int pmon_zeroset
PARAMS ((int recsize
, char **buff
, int *amount
,
133 unsigned int *chksum
));
135 static int pmon_checkset
PARAMS ((int recsize
, char **buff
, int *value
));
137 static void pmon_make_fastrec
PARAMS ((char **outbuf
, unsigned char *inbuf
,
138 int *inptr
, int inamount
, int *recsize
,
139 unsigned int *csum
, unsigned int *zerofill
));
141 static int pmon_check_ack
PARAMS ((char *mesg
));
143 static void pmon_start_download
PARAMS ((void));
145 static void pmon_end_download
PARAMS ((int final
, int bintotal
));
147 static void pmon_download
PARAMS ((char *buffer
, int length
));
149 static void pmon_load_fast
PARAMS ((char *file
));
151 static void mips_load
PARAMS ((char *file
, int from_tty
));
153 static int mips_make_srec
PARAMS ((char *buffer
, int type
, CORE_ADDR memaddr
,
154 unsigned char *myaddr
, int len
));
156 static int set_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
157 enum break_type type
));
159 static int clear_breakpoint
PARAMS ((CORE_ADDR addr
, int len
,
160 enum break_type type
));
162 static int common_breakpoint
PARAMS ((int set
, CORE_ADDR addr
, int len
,
163 enum break_type type
));
165 /* Forward declarations. */
166 extern struct target_ops mips_ops
;
167 extern struct target_ops pmon_ops
;
168 extern struct target_ops ddb_ops
;
170 /* The MIPS remote debugging interface is built on top of a simple
171 packet protocol. Each packet is organized as follows:
173 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
174 may not appear anywhere else in the packet. Any time a SYN is
175 seen, a new packet should be assumed to have begun.
178 This byte contains the upper five bits of the logical length
179 of the data section, plus a single bit indicating whether this
180 is a data packet or an acknowledgement. The documentation
181 indicates that this bit is 1 for a data packet, but the actual
182 board uses 1 for an acknowledgement. The value of the byte is
183 0x40 + (ack ? 0x20 : 0) + (len >> 6)
184 (we always have 0 <= len < 1024). Acknowledgement packets do
185 not carry data, and must have a data length of 0.
187 LEN1 This byte contains the lower six bits of the logical length of
188 the data section. The value is
191 SEQ This byte contains the six bit sequence number of the packet.
194 An acknowlegment packet contains the sequence number of the
195 packet being acknowledged plus 1 modulo 64. Data packets are
196 transmitted in sequence. There may only be one outstanding
197 unacknowledged data packet at a time. The sequence numbers
198 are independent in each direction. If an acknowledgement for
199 the previous packet is received (i.e., an acknowledgement with
200 the sequence number of the packet just sent) the packet just
201 sent should be retransmitted. If no acknowledgement is
202 received within a timeout period, the packet should be
203 retransmitted. This has an unfortunate failure condition on a
204 high-latency line, as a delayed acknowledgement may lead to an
205 endless series of duplicate packets.
207 DATA The actual data bytes follow. The following characters are
208 escaped inline with DLE (ASCII 020, or ^P):
214 The additional DLE characters are not counted in the logical
215 length stored in the TYPE_LEN and LEN1 bytes.
220 These bytes contain an 18 bit checksum of the complete
221 contents of the packet excluding the SEQ byte and the
222 CSUM[123] bytes. The checksum is simply the twos complement
223 addition of all the bytes treated as unsigned characters. The
224 values of the checksum bytes are:
225 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
226 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
227 CSUM3: 0x40 + (cksum & 0x3f)
229 It happens that the MIPS remote debugging protocol always
230 communicates with ASCII strings. Because of this, this
231 implementation doesn't bother to handle the DLE quoting mechanism,
232 since it will never be required. */
234 /* The SYN character which starts each packet. */
237 /* The 0x40 used to offset each packet (this value ensures that all of
238 the header and trailer bytes, other than SYN, are printable ASCII
240 #define HDR_OFFSET 0x40
242 /* The indices of the bytes in the packet header. */
243 #define HDR_INDX_SYN 0
244 #define HDR_INDX_TYPE_LEN 1
245 #define HDR_INDX_LEN1 2
246 #define HDR_INDX_SEQ 3
249 /* The data/ack bit in the TYPE_LEN header byte. */
250 #define TYPE_LEN_DA_BIT 0x20
251 #define TYPE_LEN_DATA 0
252 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
254 /* How to compute the header bytes. */
255 #define HDR_SET_SYN(data, len, seq) (SYN)
256 #define HDR_SET_TYPE_LEN(data, len, seq) \
258 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
259 + (((len) >> 6) & 0x1f))
260 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
261 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
263 /* Check that a header byte is reasonable. */
264 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
266 /* Get data from the header. These macros evaluate their argument
268 #define HDR_IS_DATA(hdr) \
269 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
270 #define HDR_GET_LEN(hdr) \
271 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
272 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
274 /* The maximum data length. */
275 #define DATA_MAXLEN 1023
277 /* The trailer offset. */
278 #define TRLR_OFFSET HDR_OFFSET
280 /* The indices of the bytes in the packet trailer. */
281 #define TRLR_INDX_CSUM1 0
282 #define TRLR_INDX_CSUM2 1
283 #define TRLR_INDX_CSUM3 2
284 #define TRLR_LENGTH 3
286 /* How to compute the trailer bytes. */
287 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
288 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
289 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
291 /* Check that a trailer byte is reasonable. */
292 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
294 /* Get data from the trailer. This evaluates its argument multiple
296 #define TRLR_GET_CKSUM(trlr) \
297 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
298 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
299 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
301 /* The sequence number modulos. */
302 #define SEQ_MODULOS (64)
304 /* PMON commands to load from the serial port or UDP socket. */
305 #define LOAD_CMD "load -b -s tty0\r"
306 #define LOAD_CMD_UDP "load -b -s udp\r"
308 /* The target vectors for the four different remote MIPS targets.
309 These are initialized with code in _initialize_remote_mips instead
310 of static initializers, to make it easier to extend the target_ops
312 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
314 enum mips_monitor_type
{
315 /* IDT/SIM monitor being used: */
317 /* PMON monitor being used: */
318 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
319 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
320 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
321 /* Last and unused value, for sizing vectors, etc. */
324 static enum mips_monitor_type mips_monitor
= MON_LAST
;
326 /* The monitor prompt text. If the user sets the PMON prompt
327 to some new value, the GDB `set monitor-prompt' command must also
328 be used to inform GDB about the expected prompt. Otherwise, GDB
329 will not be able to connect to PMON in mips_initialize().
330 If the `set monitor-prompt' command is not used, the expected
331 default prompt will be set according the target:
338 static char *mips_monitor_prompt
;
340 /* Set to 1 if the target is open. */
341 static int mips_is_open
;
343 /* Currently active target description (if mips_is_open == 1) */
344 static struct target_ops
*current_ops
;
346 /* Set to 1 while the connection is being initialized. */
347 static int mips_initializing
;
349 /* Set to 1 while the connection is being brought down. */
350 static int mips_exiting
;
352 /* The next sequence number to send. */
353 static unsigned int mips_send_seq
;
355 /* The next sequence number we expect to receive. */
356 static unsigned int mips_receive_seq
;
358 /* The time to wait before retransmitting a packet, in seconds. */
359 static int mips_retransmit_wait
= 3;
361 /* The number of times to try retransmitting a packet before giving up. */
362 static int mips_send_retries
= 10;
364 /* The number of garbage characters to accept when looking for an
365 SYN for the next packet. */
366 static int mips_syn_garbage
= 1050;
368 /* The time to wait for a packet, in seconds. */
369 static int mips_receive_wait
= 5;
371 /* Set if we have sent a packet to the board but have not yet received
373 static int mips_need_reply
= 0;
375 /* Handle used to access serial I/O stream. */
376 static serial_t mips_desc
;
378 /* UDP handle used to download files to target. */
379 static serial_t udp_desc
;
380 static int udp_in_use
;
382 /* TFTP filename used to download files to DDB board, in the form
384 static char *tftp_name
; /* host:filename */
385 static char *tftp_localname
; /* filename portion of above */
386 static int tftp_in_use
;
387 static FILE *tftp_file
;
389 /* Counts the number of times the user tried to interrupt the target (usually
391 static int interrupt_count
;
393 /* If non-zero, means that the target is running. */
394 static int mips_wait_flag
= 0;
396 /* If non-zero, monitor supports breakpoint commands. */
397 static monitor_supports_breakpoints
= 0;
399 /* Data cache header. */
401 #if 0 /* not used (yet?) */
402 static DCACHE
*mips_dcache
;
405 /* Non-zero means that we've just hit a read or write watchpoint */
406 static int hit_watchpoint
;
408 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
409 The table is indexed by a breakpoint number, which is an integer
410 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
412 #define MAX_LSI_BREAKPOINTS 256
413 struct lsi_breakpoint_info
415 enum break_type type
; /* type of breakpoint */
416 CORE_ADDR addr
; /* address of breakpoint */
417 int len
; /* length of region being watched */
418 unsigned long value
; /* value to watch */
419 } lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
421 /* Error/warning codes returned by LSI PMON for breakpoint commands.
422 Warning values may be ORed together; error values may not. */
423 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
424 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
425 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
426 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
428 #define E_ERR 0x200 /* This bit is set if the error code is an error */
429 #define E_BPT 0x200 /* error: No such breakpoint number */
430 #define E_RGE 0x201 /* error: Range is not supported */
431 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
432 #define E_OUT 0x203 /* error: Out of hardware resources */
433 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
437 int code
; /* error code */
438 char *string
; /* string associated with this code */
441 struct lsi_error lsi_warning_table
[] =
443 { W_MSK
, "Range feature is supported via mask" },
444 { W_VAL
, "Value check is not supported in hardware" },
445 { W_QAL
, "Requested qualifiers are not supported in hardware" },
449 struct lsi_error lsi_error_table
[] =
451 { E_BPT
, "No such breakpoint number" },
452 { E_RGE
, "Range is not supported" },
453 { E_QAL
, "The requested qualifiers can not be used" },
454 { E_OUT
, "Out of hardware resources" },
455 { E_NON
, "Hardware breakpoint not supported" },
459 /* Set to 1 with the 'set monitor-warnings' command to enable printing
460 of warnings returned by PMON when hardware breakpoints are used. */
461 static int monitor_warnings
;
468 SERIAL_CLOSE (mips_desc
);
472 SERIAL_CLOSE (udp_desc
);
478 /* Handle low-level error that we can't recover from. Note that just
479 error()ing out from target_wait or some such low-level place will cause
480 all hell to break loose--the rest of GDB will tend to get left in an
481 inconsistent state. */
484 #ifdef ANSI_PROTOTYPES
485 mips_error (char *string
, ...)
487 mips_error (va_alist
)
493 #ifdef ANSI_PROTOTYPES
494 va_start (args
, string
);
498 string
= va_arg (args
, char *);
501 target_terminal_ours ();
502 wrap_here(""); /* Force out any buffered output */
503 gdb_flush (gdb_stdout
);
505 fprintf_filtered (gdb_stderr
, error_pre_print
);
506 vfprintf_filtered (gdb_stderr
, string
, args
);
507 fprintf_filtered (gdb_stderr
, "\n");
509 gdb_flush (gdb_stderr
);
511 /* Clean up in such a way that mips_close won't try to talk to the
512 board (it almost surely won't work since we weren't able to talk to
516 printf_unfiltered ("Ending remote MIPS debugging.\n");
517 target_mourn_inferior ();
519 return_to_top_level (RETURN_ERROR
);
522 /* putc_readable - print a character, displaying non-printable chars in
523 ^x notation or in hex. */
530 putchar_unfiltered ('\n');
532 printf_unfiltered ("\\r");
533 else if (ch
< 0x20) /* ASCII control character */
534 printf_unfiltered ("^%c", ch
+ '@');
535 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
536 printf_unfiltered ("[%02x]", ch
& 0xff);
538 putchar_unfiltered (ch
);
542 /* puts_readable - print a string, displaying non-printable chars in
543 ^x notation or in hex. */
546 puts_readable (string
)
551 while ((c
= *string
++) != '\0')
556 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
557 timed out. TIMEOUT specifies timeout value in seconds.
561 mips_expect_timeout (string
, timeout
)
569 printf_unfiltered ("Expected \"");
570 puts_readable (string
);
571 printf_unfiltered ("\", got \"");
579 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
580 were waiting for the mips_monitor_prompt... */
582 c
= SERIAL_READCHAR (mips_desc
, timeout
);
584 if (c
== SERIAL_TIMEOUT
)
587 printf_unfiltered ("\": FAIL\n");
600 printf_unfiltered ("\": OK\n");
613 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
614 timed out. The timeout value is hard-coded to 2 seconds. Use
615 mips_expect_timeout if a different timeout value is needed.
622 return mips_expect_timeout (string
, 2);
625 /* Read the required number of characters into the given buffer (which
626 is assumed to be large enough). The only failure is a timeout. */
628 mips_getstring (string
, n
)
638 c
= SERIAL_READCHAR (mips_desc
, 2);
640 if (c
== SERIAL_TIMEOUT
) {
641 fprintf_unfiltered (stderr
, "Failed to read %d characters from target (TIMEOUT)\n", n
);
652 /* Read a character from the remote, aborting on error. Returns
653 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
654 returns). FIXME: If we see the string mips_monitor_prompt from
655 the board, then we are debugging on the main console port, and we
656 have somehow dropped out of remote debugging mode. In this case,
657 we automatically go back in to remote debugging mode. This is a
658 hack, put in because I can't find any way for a program running on
659 the remote board to terminate without also ending remote debugging
660 mode. I assume users won't have any trouble with this; for one
661 thing, the IDT documentation generally assumes that the remote
662 debugging port is not the console port. This is, however, very
663 convenient for DejaGnu when you only have one connected serial
667 mips_readchar (timeout
)
671 static int state
= 0;
672 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
674 #ifdef MAINTENANCE_CMDS
679 if (i
== -1 && watchdog
> 0)
684 if (state
== mips_monitor_prompt_len
)
686 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
687 #ifdef MAINTENANCE_CMDS
688 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
690 target_mourn_inferior ();
691 error ("Watchdog has expired. Target detached.\n");
694 if (ch
== SERIAL_EOF
)
695 mips_error ("End of file from remote");
696 if (ch
== SERIAL_ERROR
)
697 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
698 if (remote_debug
> 1)
700 /* Don't use _filtered; we can't deal with a QUIT out of
701 target_wait, and I think this might be called from there. */
702 if (ch
!= SERIAL_TIMEOUT
)
703 printf_unfiltered ("Read '%c' %d 0x%x\n", ch
, ch
, ch
);
705 printf_unfiltered ("Timed out in read\n");
708 /* If we have seen mips_monitor_prompt and we either time out, or
709 we see a @ (which was echoed from a packet we sent), reset the
710 board as described above. The first character in a packet after
711 the SYN (which is not echoed) is always an @ unless the packet is
712 more than 64 characters long, which ours never are. */
713 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
714 && state
== mips_monitor_prompt_len
715 && ! mips_initializing
718 if (remote_debug
> 0)
719 /* Don't use _filtered; we can't deal with a QUIT out of
720 target_wait, and I think this might be called from there. */
721 printf_unfiltered ("Reinitializing MIPS debugging mode\n");
728 /* At this point, about the only thing we can do is abort the command
729 in progress and get back to command level as quickly as possible. */
731 error ("Remote board reset, debug protocol re-initialized.");
734 if (ch
== mips_monitor_prompt
[state
])
742 /* Get a packet header, putting the data in the supplied buffer.
743 PGARBAGE is a pointer to the number of garbage characters received
744 so far. CH is the last character received. Returns 0 for success,
745 or -1 for timeout. */
748 mips_receive_header (hdr
, pgarbage
, ch
, timeout
)
758 /* Wait for a SYN. mips_syn_garbage is intended to prevent
759 sitting here indefinitely if the board sends us one garbage
760 character per second. ch may already have a value from the
761 last time through the loop. */
764 ch
= mips_readchar (timeout
);
765 if (ch
== SERIAL_TIMEOUT
)
769 /* Printing the character here lets the user of gdb see
770 what the program is outputting, if the debugging is
771 being done on the console port. Don't use _filtered;
772 we can't deal with a QUIT out of target_wait. */
773 if (! mips_initializing
|| remote_debug
> 0)
776 gdb_flush (gdb_stdout
);
780 if (mips_syn_garbage
> 0
781 && *pgarbage
> mips_syn_garbage
)
782 mips_error ("Debug protocol failure: more than %d characters before a sync.",
787 /* Get the packet header following the SYN. */
788 for (i
= 1; i
< HDR_LENGTH
; i
++)
790 ch
= mips_readchar (timeout
);
791 if (ch
== SERIAL_TIMEOUT
)
793 /* Make sure this is a header byte. */
794 if (ch
== SYN
|| ! HDR_CHECK (ch
))
800 /* If we got the complete header, we can return. Otherwise we
801 loop around and keep looking for SYN. */
807 /* Get a packet header, putting the data in the supplied buffer.
808 PGARBAGE is a pointer to the number of garbage characters received
809 so far. The last character read is returned in *PCH. Returns 0
810 for success, -1 for timeout, -2 for error. */
813 mips_receive_trailer (trlr
, pgarbage
, pch
, timeout
)
822 for (i
= 0; i
< TRLR_LENGTH
; i
++)
824 ch
= mips_readchar (timeout
);
826 if (ch
== SERIAL_TIMEOUT
)
828 if (! TRLR_CHECK (ch
))
835 /* Get the checksum of a packet. HDR points to the packet header.
836 DATA points to the packet data. LEN is the length of DATA. */
839 mips_cksum (hdr
, data
, len
)
840 const unsigned char *hdr
;
841 const unsigned char *data
;
844 register const unsigned char *p
;
850 /* The initial SYN is not included in the checksum. */
864 /* Send a packet containing the given ASCII string. */
867 mips_send_packet (s
, get_ack
)
871 /* unsigned */ int len
;
872 unsigned char *packet
;
877 if (len
> DATA_MAXLEN
)
878 mips_error ("MIPS protocol data packet too long: %s", s
);
880 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
882 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
883 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
884 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
885 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
887 memcpy (packet
+ HDR_LENGTH
, s
, len
);
889 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
890 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
891 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
892 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
894 /* Increment the sequence number. This will set mips_send_seq to
895 the sequence number we expect in the acknowledgement. */
896 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
898 /* We can only have one outstanding data packet, so we just wait for
899 the acknowledgement here. Keep retransmitting the packet until
900 we get one, or until we've tried too many times. */
901 for (try = 0; try < mips_send_retries
; try++)
906 if (remote_debug
> 0)
908 /* Don't use _filtered; we can't deal with a QUIT out of
909 target_wait, and I think this might be called from there. */
910 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
911 printf_unfiltered ("Writing \"%s\"\n", packet
+ 1);
914 if (SERIAL_WRITE (mips_desc
, packet
,
915 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
916 mips_error ("write to target failed: %s", safe_strerror (errno
));
925 unsigned char hdr
[HDR_LENGTH
+ 1];
926 unsigned char trlr
[TRLR_LENGTH
+ 1];
930 /* Get the packet header. If we time out, resend the data
932 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
938 /* If we get a data packet, assume it is a duplicate and
939 ignore it. FIXME: If the acknowledgement is lost, this
940 data packet may be the packet the remote sends after the
942 if (HDR_IS_DATA (hdr
)) {
945 /* Ignore any errors raised whilst attempting to ignore
948 len
= HDR_GET_LEN (hdr
);
950 for (i
= 0; i
< len
; i
++)
954 rch
= mips_readchar (2);
960 if (rch
== SERIAL_TIMEOUT
)
962 /* ignore the character */
966 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, 2);
968 /* We don't bother checking the checksum, or providing an
969 ACK to the packet. */
973 /* If the length is not 0, this is a garbled packet. */
974 if (HDR_GET_LEN (hdr
) != 0)
977 /* Get the packet trailer. */
978 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
979 mips_retransmit_wait
);
981 /* If we timed out, resend the data packet. */
985 /* If we got a bad character, reread the header. */
989 /* If the checksum does not match the trailer checksum, this
990 is a bad packet; ignore it. */
991 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
992 != TRLR_GET_CKSUM (trlr
))
995 if (remote_debug
> 0)
997 hdr
[HDR_LENGTH
] = '\0';
998 trlr
[TRLR_LENGTH
] = '\0';
999 /* Don't use _filtered; we can't deal with a QUIT out of
1000 target_wait, and I think this might be called from there. */
1001 printf_unfiltered ("Got ack %d \"%s%s\"\n",
1002 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
1005 /* If this ack is for the current packet, we're done. */
1006 seq
= HDR_GET_SEQ (hdr
);
1007 if (seq
== mips_send_seq
)
1010 /* If this ack is for the last packet, resend the current
1012 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1015 /* Otherwise this is a bad ack; ignore it. Increment the
1016 garbage count to ensure that we do not stay in this loop
1022 mips_error ("Remote did not acknowledge packet");
1025 /* Receive and acknowledge a packet, returning the data in BUFF (which
1026 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1027 implies that only the sender retransmits packets, so this code just
1028 waits silently for a packet. It returns the length of the received
1029 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1030 don't print an error message and return -1. */
1033 mips_receive_packet (buff
, throw_error
, timeout
)
1041 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1048 unsigned char hdr
[HDR_LENGTH
];
1049 unsigned char trlr
[TRLR_LENGTH
];
1053 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1056 mips_error ("Timed out waiting for remote packet");
1063 /* An acknowledgement is probably a duplicate; ignore it. */
1064 if (! HDR_IS_DATA (hdr
))
1066 len
= HDR_GET_LEN (hdr
);
1067 /* Check if the length is valid for an ACK, we may aswell
1068 try and read the remainder of the packet: */
1071 /* Ignore the error condition, since we are going to
1072 ignore the packet anyway. */
1073 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1075 /* Don't use _filtered; we can't deal with a QUIT out of
1076 target_wait, and I think this might be called from there. */
1077 if (remote_debug
> 0)
1078 printf_unfiltered ("Ignoring unexpected ACK\n");
1082 len
= HDR_GET_LEN (hdr
);
1083 for (i
= 0; i
< len
; i
++)
1087 rch
= mips_readchar (timeout
);
1093 if (rch
== SERIAL_TIMEOUT
)
1096 mips_error ("Timed out waiting for remote packet");
1105 /* Don't use _filtered; we can't deal with a QUIT out of
1106 target_wait, and I think this might be called from there. */
1107 if (remote_debug
> 0)
1108 printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n",
1113 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1117 mips_error ("Timed out waiting for packet");
1123 /* Don't use _filtered; we can't deal with a QUIT out of
1124 target_wait, and I think this might be called from there. */
1125 if (remote_debug
> 0)
1126 printf_unfiltered ("Got SYN when wanted trailer\n");
1130 /* If this is the wrong sequence number, ignore it. */
1131 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1133 /* Don't use _filtered; we can't deal with a QUIT out of
1134 target_wait, and I think this might be called from there. */
1135 if (remote_debug
> 0)
1136 printf_unfiltered ("Ignoring sequence number %d (want %d)\n",
1137 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1141 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1144 if (remote_debug
> 0)
1145 /* Don't use _filtered; we can't deal with a QUIT out of
1146 target_wait, and I think this might be called from there. */
1147 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1148 mips_cksum (hdr
, buff
, len
),
1149 TRLR_GET_CKSUM (trlr
));
1151 /* The checksum failed. Send an acknowledgement for the
1152 previous packet to tell the remote to resend the packet. */
1153 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1154 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1155 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1156 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1158 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1160 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1161 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1162 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1164 if (remote_debug
> 0)
1166 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1167 /* Don't use _filtered; we can't deal with a QUIT out of
1168 target_wait, and I think this might be called from there. */
1169 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1173 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1176 mips_error ("write to target failed: %s", safe_strerror (errno
));
1182 if (remote_debug
> 0)
1185 /* Don't use _filtered; we can't deal with a QUIT out of
1186 target_wait, and I think this might be called from there. */
1187 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1190 /* We got the packet. Send an acknowledgement. */
1191 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1193 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1194 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1195 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1196 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1198 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1200 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1201 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1202 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1204 if (remote_debug
> 0)
1206 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1207 /* Don't use _filtered; we can't deal with a QUIT out of
1208 target_wait, and I think this might be called from there. */
1209 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1213 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1216 mips_error ("write to target failed: %s", safe_strerror (errno
));
1224 /* Optionally send a request to the remote system and optionally wait
1225 for the reply. This implements the remote debugging protocol,
1226 which is built on top of the packet protocol defined above. Each
1227 request has an ADDR argument and a DATA argument. The following
1228 requests are defined:
1230 \0 don't send a request; just wait for a reply
1231 i read word from instruction space at ADDR
1232 d read word from data space at ADDR
1233 I write DATA to instruction space at ADDR
1234 D write DATA to data space at ADDR
1235 r read register number ADDR
1236 R set register number ADDR to value DATA
1237 c continue execution (if ADDR != 1, set pc to ADDR)
1238 s single step (if ADDR != 1, set pc to ADDR)
1240 The read requests return the value requested. The write requests
1241 return the previous value in the changed location. The execution
1242 requests return a UNIX wait value (the approximate signal which
1243 caused execution to stop is in the upper eight bits).
1245 If PERR is not NULL, this function waits for a reply. If an error
1246 occurs, it sets *PERR to 1 and sets errno according to what the
1247 target board reports. */
1250 mips_request (cmd
, addr
, data
, perr
, timeout
, buff
)
1258 char myBuff
[DATA_MAXLEN
+ 1];
1265 if (buff
== (char *) NULL
)
1270 if (mips_need_reply
)
1271 fatal ("mips_request: Trying to send command before reply");
1272 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1273 mips_send_packet (buff
, 1);
1274 mips_need_reply
= 1;
1277 if (perr
== (int *) NULL
)
1280 if (! mips_need_reply
)
1281 fatal ("mips_request: Trying to get reply before command");
1283 mips_need_reply
= 0;
1285 len
= mips_receive_packet (buff
, 1, timeout
);
1288 if (sscanf (buff
, "0x%x %c 0x%x 0x%x",
1289 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1290 || (cmd
!= '\0' && rcmd
!= cmd
))
1291 mips_error ("Bad response from remote board");
1297 /* FIXME: This will returns MIPS errno numbers, which may or may
1298 not be the same as errno values used on other systems. If
1299 they stick to common errno values, they will be the same, but
1300 if they don't, they must be translated. */
1311 mips_initialize_cleanups (arg
)
1314 mips_initializing
= 0;
1318 mips_exit_cleanups (arg
)
1325 mips_send_command (cmd
, prompt
)
1329 SERIAL_WRITE (mips_desc
, cmd
, strlen(cmd
));
1333 mips_expect (mips_monitor_prompt
);
1336 /* Enter remote (dbx) debug mode: */
1340 /* Reset the sequence numbers, ready for the new debug sequence: */
1342 mips_receive_seq
= 0;
1344 if (mips_monitor
!= MON_IDT
)
1345 mips_send_command ("debug\r", 0);
1346 else /* assume IDT monitor by default */
1347 mips_send_command ("db tty0\r", 0);
1349 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1351 /* We don't need to absorb any spurious characters here, since the
1352 mips_receive_header will eat up a reasonable number of characters
1353 whilst looking for the SYN, however this avoids the "garbage"
1354 being displayed to the user. */
1355 if (mips_monitor
!= MON_IDT
)
1359 char buff
[DATA_MAXLEN
+ 1];
1360 if (mips_receive_packet (buff
, 1, 3) < 0)
1361 mips_error ("Failed to initialize (didn't receive packet).");
1365 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1370 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1374 if (mips_monitor
!= MON_IDT
)
1376 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1377 so we do not get a reply to this command: */
1378 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL
,
1379 mips_receive_wait
, NULL
);
1380 mips_need_reply
= 0;
1381 if (!mips_expect (" break!"))
1385 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err
,
1386 mips_receive_wait
, NULL
);
1388 if (mips_monitor
== MON_IDT
&& !mips_expect ("Exiting remote debug"))
1391 if (mips_monitor
== MON_DDB
)
1393 if (!mips_expect ("\n"))
1397 if (!mips_expect ("\r\n"))
1400 if (!mips_expect (mips_monitor_prompt
))
1403 do_cleanups (old_cleanups
);
1408 /* Initialize a new connection to the MIPS board, and make sure we are
1409 really connected. */
1415 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1418 /* What is this code doing here? I don't see any way it can happen, and
1419 it might mean mips_initializing didn't get cleared properly.
1420 So I'll make it a warning. */
1422 if (mips_initializing
)
1424 warning ("internal error: mips_initialize called twice");
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 at the prompt */
1439 j
= 1; /* start by sending a break */
1444 case 0: /* First, try sending a CR */
1445 SERIAL_FLUSH_INPUT (mips_desc
);
1446 SERIAL_WRITE (mips_desc
, "\r", 1);
1448 case 1: /* First, try sending a break */
1449 SERIAL_SEND_BREAK (mips_desc
);
1451 case 2: /* Then, try a ^C */
1452 SERIAL_WRITE (mips_desc
, "\003", 1);
1454 case 3: /* Then, try escaping from download */
1456 if (mips_monitor
!= MON_IDT
)
1460 /* We shouldn't need to send multiple termination
1461 sequences, since the target performs line (or
1462 block) reads, and then processes those
1463 packets. In-case we were downloading a large packet
1464 we flush the output buffer before inserting a
1465 termination sequence. */
1466 SERIAL_FLUSH_OUTPUT (mips_desc
);
1467 sprintf (tbuff
, "\r/E/E\r");
1468 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1475 /* We are possibly in binary download mode, having
1476 aborted in the middle of an S-record. ^C won't
1477 work because of binary mode. The only reliable way
1478 out is to send enough termination packets (8 bytes)
1479 to fill up and then overflow the largest size
1480 S-record (255 bytes in this case). This amounts to
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 /* Ensure the correct target state: */
1508 if (mips_monitor
!= MON_LSI
)
1509 mips_send_command ("set regsize 64\r", -1);
1510 mips_send_command ("set hostport tty0\r", -1);
1511 mips_send_command ("set brkcmd \"\"\r", -1);
1512 /* Delete all the current breakpoints: */
1513 mips_send_command ("db *\r", -1);
1514 /* NOTE: PMON does not have breakpoint support through the
1515 "debug" mode, only at the monitor command-line. */
1518 mips_enter_debug ();
1520 /* Clear all breakpoints: */
1521 if ((mips_monitor
== MON_IDT
1522 && clear_breakpoint (BREAK_UNUSED
, -1, 0) == 0)
1523 || mips_monitor
== MON_LSI
)
1524 monitor_supports_breakpoints
= 1;
1526 monitor_supports_breakpoints
= 0;
1528 do_cleanups (old_cleanups
);
1530 /* If this doesn't call error, we have connected; we don't care if
1531 the request itself succeeds or fails. */
1533 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err
,
1534 mips_receive_wait
, NULL
);
1535 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1536 select_frame (get_current_frame (), 0);
1539 /* Open a connection to the remote board. */
1541 common_open (ops
, name
, from_tty
, new_monitor
, new_monitor_prompt
)
1542 struct target_ops
*ops
;
1545 enum mips_monitor_type new_monitor
;
1546 char *new_monitor_prompt
;
1549 char *serial_port_name
;
1550 char *remote_name
= 0;
1551 char *local_name
= 0;
1556 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1557 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 if ((argv
= buildargv (name
)) == NULL
)
1569 make_cleanup (freeargv
, (char *) argv
);
1571 serial_port_name
= strsave (argv
[0]);
1572 if (argv
[1]) /* remote TFTP name specified? */
1574 remote_name
= argv
[1];
1575 if (argv
[2]) /* local TFTP filename specified? */
1576 local_name
= argv
[2];
1579 target_preopen (from_tty
);
1582 unpush_target (current_ops
);
1584 /* Open and initialize the serial port. */
1585 mips_desc
= SERIAL_OPEN (serial_port_name
);
1586 if (mips_desc
== (serial_t
) NULL
)
1587 perror_with_name (serial_port_name
);
1589 if (baud_rate
!= -1)
1591 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1593 SERIAL_CLOSE (mips_desc
);
1594 perror_with_name (serial_port_name
);
1598 SERIAL_RAW (mips_desc
);
1600 /* Open and initialize the optional download port. If it is in the form
1601 hostname#portnumber, it's a UDP socket. If it is in the form
1602 hostname:filename, assume it's the TFTP filename that must be
1603 passed to the DDB board to tell it where to get the load file. */
1606 if (strchr (remote_name
, '#'))
1608 udp_desc
= SERIAL_OPEN (remote_name
);
1610 perror_with_name ("Unable to open UDP port");
1615 /* Save the remote and local names of the TFTP temp file. If
1616 the user didn't specify a local name, assume it's the same
1617 as the part of the remote name after the "host:". */
1621 free (tftp_localname
);
1622 if (local_name
== NULL
)
1623 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1624 local_name
++; /* skip over the colon */
1625 if (local_name
== NULL
)
1626 local_name
= remote_name
; /* local name same as remote name */
1627 tftp_name
= strsave (remote_name
);
1628 tftp_localname
= strsave (local_name
);
1636 /* Reset the expected monitor prompt if it's never been set before. */
1637 if (mips_monitor_prompt
== NULL
)
1638 mips_monitor_prompt
= strsave (new_monitor_prompt
);
1639 mips_monitor
= new_monitor
;
1644 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1646 /* Switch to using remote target now. */
1649 /* FIXME: Should we call start_remote here? */
1651 /* Try to figure out the processor model if possible. */
1652 ptype
= mips_read_processor_type ();
1654 mips_set_processor_type_command (strsave (ptype
), 0);
1656 /* This is really the job of start_remote however, that makes an assumption
1657 that the target is about to print out a status message of some sort. That
1658 doesn't happen here (in fact, it may not be possible to get the monitor to
1659 send the appropriate packet). */
1661 flush_cached_frames ();
1662 registers_changed ();
1663 stop_pc
= read_pc ();
1664 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1665 select_frame (get_current_frame (), 0);
1666 print_stack_frame (selected_frame
, -1, 1);
1667 free (serial_port_name
);
1671 mips_open (name
, from_tty
)
1675 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, TARGET_MONITOR_PROMPT
);
1679 pmon_open (name
, from_tty
)
1683 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1687 ddb_open (name
, from_tty
)
1691 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1695 lsi_open (name
, from_tty
)
1701 /* Clear the LSI breakpoint table. */
1702 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1703 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1705 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1708 /* Close a connection to the remote board. */
1711 mips_close (quitting
)
1716 /* Get the board out of remote debugging mode. */
1717 (void) mips_exit_debug ();
1723 /* Detach from the remote board. */
1726 mips_detach (args
, from_tty
)
1731 error ("Argument given to \"detach\" when remotely debugging.");
1738 printf_unfiltered ("Ending remote MIPS debugging.\n");
1741 /* Tell the target board to resume. This does not wait for a reply
1742 from the board, except in the case of single-stepping on LSI boards,
1743 where PMON does return a reply. */
1746 mips_resume (pid
, step
, siggnal
)
1748 enum target_signal siggnal
;
1752 /* start-sanitize-gm */
1753 #ifndef GENERAL_MAGIC
1754 if (siggnal
!= TARGET_SIGNAL_0
)
1756 ("Can't send signals to a remote system. Try `handle %s ignore'.",
1757 target_signal_to_name (siggnal
));
1758 #endif /* GENERAL_MAGIC */
1759 /* end-sanitize-gm */
1761 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1762 a single step, so we wait for that. */
1763 mips_request (step
? 's' : 'c',
1765 (unsigned int) siggnal
,
1766 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1767 mips_receive_wait
, NULL
);
1770 /* Return the signal corresponding to SIG, where SIG is the number which
1771 the MIPS protocol uses for the signal. */
1773 mips_signal_from_protocol (sig
)
1776 /* We allow a few more signals than the IDT board actually returns, on
1777 the theory that there is at least *some* hope that perhaps the numbering
1778 for these signals is widely agreed upon. */
1781 return TARGET_SIGNAL_UNKNOWN
;
1783 /* Don't want to use target_signal_from_host because we are converting
1784 from MIPS signal numbers, not host ones. Our internal numbers
1785 match the MIPS numbers for the signals the board can return, which
1786 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1787 return (enum target_signal
) sig
;
1790 /* Wait until the remote stops, and return a wait status. */
1793 mips_wait (pid
, status
)
1795 struct target_waitstatus
*status
;
1799 char buff
[DATA_MAXLEN
];
1805 interrupt_count
= 0;
1808 /* If we have not sent a single step or continue command, then the
1809 board is waiting for us to do something. Return a status
1810 indicating that it is stopped. */
1811 if (! mips_need_reply
)
1813 status
->kind
= TARGET_WAITKIND_STOPPED
;
1814 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1818 /* No timeout; we sit here as long as the program continues to execute. */
1820 rstatus
= mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err
, -1,
1824 mips_error ("Remote failure: %s", safe_strerror (errno
));
1826 /* On returning from a continue, the PMON monitor seems to start
1827 echoing back the messages we send prior to sending back the
1828 ACK. The code can cope with this, but to try and avoid the
1829 unnecessary serial traffic, and "spurious" characters displayed
1830 to the user, we cheat and reset the debug protocol. The problems
1831 seems to be caused by a check on the number of arguments, and the
1832 command length, within the monitor causing it to echo the command
1834 if (mips_monitor
== MON_PMON
)
1837 mips_enter_debug ();
1840 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1842 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1843 &rpc
, &rfp
, &rsp
, flags
);
1846 char buf
[MAX_REGISTER_RAW_SIZE
];
1848 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1849 supply_register (PC_REGNUM
, buf
);
1851 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1852 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1854 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1855 supply_register (SP_REGNUM
, buf
);
1857 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1858 supply_register (FP_REGNUM
, buf
);
1864 for (i
= 0; i
<= 2; i
++)
1865 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1867 else if (flags
[i
] == '\000')
1872 if (strcmp (target_shortname
, "lsi") == 0)
1875 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1876 Right now, PMON doesn't give us enough information to determine which
1877 breakpoint we hit. So we have to look up the PC in our own table
1878 of breakpoints, and if found, assume it's just a normal instruction
1879 fetch breakpoint, not a data watchpoint. FIXME when PMON
1880 provides some way to tell us what type of breakpoint it is. */
1882 CORE_ADDR pc
= read_pc();
1885 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1887 if (lsi_breakpoints
[i
].addr
== pc
1888 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1895 /* If a data breakpoint was hit, PMON returns the following packet:
1897 The return packet from an ordinary breakpoint doesn't have the
1898 extra 0x01 field tacked onto the end. */
1899 if (nfields
== 1 && rpc
== 1)
1904 /* NOTE: The following (sig) numbers are defined by PMON:
1905 SPP_SIGTRAP 5 breakpoint
1913 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1914 and so on, because the constants we want here are determined by the
1915 MIPS protocol and have nothing to do with what host we are running on. */
1916 if ((rstatus
& 0xff) == 0)
1918 status
->kind
= TARGET_WAITKIND_EXITED
;
1919 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1921 else if ((rstatus
& 0xff) == 0x7f)
1923 status
->kind
= TARGET_WAITKIND_STOPPED
;
1924 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1926 /* If the stop PC is in the _exit function, assume
1927 we hit the 'break 0x3ff' instruction in _exit, so this
1928 is not a normal breakpoint. */
1929 if (strcmp (target_shortname
, "lsi") == 0)
1932 CORE_ADDR func_start
;
1933 CORE_ADDR pc
= read_pc();
1935 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1936 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1937 && func_start
== pc
)
1938 status
->kind
= TARGET_WAITKIND_EXITED
;
1943 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1944 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1950 /* We have to map between the register numbers used by gdb and the
1951 register numbers used by the debugging protocol. This function
1952 assumes that we are using tm-mips.h. */
1954 #define REGNO_OFFSET 96
1957 mips_map_regno (regno
)
1962 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1963 return regno
- FP0_REGNUM
+ 32;
1967 return REGNO_OFFSET
+ 0;
1969 return REGNO_OFFSET
+ 1;
1971 return REGNO_OFFSET
+ 2;
1973 return REGNO_OFFSET
+ 3;
1975 return REGNO_OFFSET
+ 4;
1977 return REGNO_OFFSET
+ 5;
1979 /* FIXME: Is there a way to get the status register? */
1984 /* Fetch the remote registers. */
1987 mips_fetch_registers (regno
)
1990 unsigned LONGEST val
;
1995 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1996 mips_fetch_registers (regno
);
2000 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
2001 /* FP_REGNUM on the mips is a hack which is just supposed to read
2002 zero (see also mips-nat.c). */
2006 /* If PMON doesn't support this register, don't waste serial
2007 bandwidth trying to read it. */
2008 int pmon_reg
= mips_map_regno (regno
);
2009 if (regno
!= 0 && pmon_reg
== 0)
2013 /* Unfortunately the PMON version in the Vr4300 board has been
2014 compiled without the 64bit register access commands. This
2015 means we cannot get hold of the full register width. */
2016 if (mips_monitor
== MON_DDB
)
2017 val
= (unsigned)mips_request ('t', (unsigned int) pmon_reg
,
2018 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2020 val
= mips_request ('r', (unsigned int) pmon_reg
,
2021 (unsigned int) 0, &err
, mips_receive_wait
, NULL
);
2023 mips_error ("Can't read register %d: %s", regno
,
2024 safe_strerror (errno
));
2029 char buf
[MAX_REGISTER_RAW_SIZE
];
2031 /* We got the number the register holds, but gdb expects to see a
2032 value in the target byte ordering. */
2033 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
2034 supply_register (regno
, buf
);
2038 /* Prepare to store registers. The MIPS protocol can store individual
2039 registers, so this function doesn't have to do anything. */
2042 mips_prepare_to_store ()
2046 /* Store remote register(s). */
2049 mips_store_registers (regno
)
2056 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2057 mips_store_registers (regno
);
2061 mips_request ('R', (unsigned int) mips_map_regno (regno
),
2062 read_register (regno
),
2063 &err
, mips_receive_wait
, NULL
);
2065 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2068 /* Fetch a word from the target board. */
2071 mips_fetch_word (addr
)
2077 /* FIXME! addr was cast to uint! */
2078 val
= mips_request ('d', addr
, (unsigned int) 0, &err
,
2079 mips_receive_wait
, NULL
);
2082 /* Data space failed; try instruction space. */
2083 /* FIXME! addr was cast to uint! */
2084 val
= mips_request ('i', addr
, (unsigned int) 0, &err
,
2085 mips_receive_wait
, NULL
);
2087 mips_error ("Can't read address 0x%s: %s",
2088 paddr_nz (addr
), safe_strerror (errno
));
2093 /* Store a word to the target board. Returns errno code or zero for
2094 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2095 memory location there. */
2097 /* FIXME! make sure only 32-bit quantities get stored! */
2099 mips_store_word (addr
, val
, old_contents
)
2105 unsigned int oldcontents
;
2107 oldcontents
= mips_request ('D', addr
, (unsigned int) val
,
2109 mips_receive_wait
, NULL
);
2112 /* Data space failed; try instruction space. */
2113 oldcontents
= mips_request ('I', addr
,
2114 (unsigned int) val
, &err
,
2115 mips_receive_wait
, NULL
);
2119 if (old_contents
!= NULL
)
2120 store_unsigned_integer (old_contents
, 4, oldcontents
);
2124 /* Read or write LEN bytes from inferior memory at MEMADDR,
2125 transferring to or from debugger address MYADDR. Write to inferior
2126 if SHOULD_WRITE is nonzero. Returns length of data written or
2127 read; 0 for error. Note that protocol gives us the correct value
2128 for a longword, since it transfers values in ASCII. We want the
2129 byte values, so we have to swap the longword values. */
2132 mips_xfer_memory (memaddr
, myaddr
, len
, write
, ignore
)
2137 struct target_ops
*ignore
;
2140 /* Round starting address down to longword boundary. */
2141 register CORE_ADDR addr
= memaddr
&~ 3;
2142 /* Round ending address up; get number of longwords that makes. */
2143 register int count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2144 /* Allocate buffer of that many longwords. */
2145 register char *buffer
= alloca (count
* 4);
2151 /* Fill start and end extra bytes of buffer with existing data. */
2152 if (addr
!= memaddr
|| len
< 4)
2154 /* Need part of initial word -- fetch it. */
2155 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2160 /* Need part of last word -- fetch it. FIXME: we do this even
2161 if we don't need it. */
2162 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2163 mips_fetch_word (addr
+ (count
- 1) * 4));
2166 /* Copy data to be written over corresponding part of buffer */
2168 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2170 /* Write the entire buffer. */
2172 for (i
= 0; i
< count
; i
++, addr
+= 4)
2174 status
= mips_store_word (addr
,
2175 extract_unsigned_integer (&buffer
[i
*4], 4),
2177 /* Report each kilobyte (we download 32-bit words at a time) */
2180 printf_unfiltered ("*");
2188 /* FIXME: Do we want a QUIT here? */
2191 printf_unfiltered ("\n");
2195 /* Read all the longwords */
2196 for (i
= 0; i
< count
; i
++, addr
+= 4)
2198 store_unsigned_integer (&buffer
[i
*4], 4, mips_fetch_word (addr
));
2202 /* Copy appropriate bytes out of the buffer. */
2203 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2208 /* Print info on this target. */
2211 mips_files_info (ignore
)
2212 struct target_ops
*ignore
;
2214 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2217 /* Kill the process running on the board. This will actually only
2218 work if we are doing remote debugging over the console input. I
2219 think that if IDT/sim had the remote debug interrupt enabled on the
2220 right port, we could interrupt the process with a break signal. */
2225 if (!mips_wait_flag
)
2230 if (interrupt_count
>= 2)
2232 interrupt_count
= 0;
2234 target_terminal_ours ();
2236 if (query ("Interrupted while waiting for the program.\n\
2237 Give up (and stop debugging it)? "))
2239 /* Clean up in such a way that mips_close won't try to talk to the
2240 board (it almost surely won't work since we weren't able to talk to
2245 printf_unfiltered ("Ending remote MIPS debugging.\n");
2246 target_mourn_inferior ();
2248 return_to_top_level (RETURN_QUIT
);
2251 target_terminal_inferior ();
2254 if (remote_debug
> 0)
2255 printf_unfiltered ("Sending break\n");
2257 SERIAL_SEND_BREAK (mips_desc
);
2266 SERIAL_WRITE (mips_desc
, &cc
, 1);
2268 target_mourn_inferior ();
2273 /* Start running on the target board. */
2276 mips_create_inferior (execfile
, args
, env
)
2286 Can't pass arguments to remote MIPS board; arguments ignored.");
2287 /* And don't try to use them on the next "run" command. */
2288 execute_command ("set args", 0);
2291 if (execfile
== 0 || exec_bfd
== 0)
2292 error ("No executable file specified");
2294 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2296 init_wait_for_inferior ();
2298 /* FIXME: Should we set inferior_pid here? */
2300 /* start-sanitize-gm */
2301 #ifdef GENERAL_MAGIC
2302 magic_create_inferior_hook ();
2303 proceed (entry_pt
, TARGET_SIGNAL_PWR
, 0);
2305 /* end-sanitize-gm */
2306 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2307 /* start-sanitize-gm */
2308 #endif /* GENERAL_MAGIC */
2309 /* end-sanitize-gm */
2312 /* Clean up after a process. Actually nothing to do. */
2315 mips_mourn_inferior ()
2317 if (current_ops
!= NULL
)
2318 unpush_target (current_ops
);
2319 generic_mourn_inferior ();
2322 /* We can write a breakpoint and read the shadow contents in one
2325 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2326 support, we read the contents of the target location and stash it,
2327 then overwrite it with a breakpoint instruction. ADDR is the target
2328 location in the target machine. CONTENTS_CACHE is a pointer to
2329 memory allocated for saving the target contents. It is guaranteed
2330 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2331 is accomplished via BREAKPOINT_MAX). */
2334 mips_insert_breakpoint (addr
, contents_cache
)
2336 char *contents_cache
;
2338 if (monitor_supports_breakpoints
)
2339 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2341 return memory_insert_breakpoint (addr
, contents_cache
);
2345 mips_remove_breakpoint (addr
, contents_cache
)
2347 char *contents_cache
;
2349 if (monitor_supports_breakpoints
)
2350 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2352 return memory_remove_breakpoint (addr
, contents_cache
);
2355 #if 0 /* currently not used */
2356 /* PMON does not currently provide support for the debug mode 'b'
2357 commands to manipulate breakpoints. However, if we wanted to use
2358 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2359 then this code performs the work needed to leave debug mode,
2360 set/clear the breakpoint, and then return to debug mode. */
2362 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2363 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2364 /* NOTE: The code relies on this vector being zero-initialised by the system */
2367 pmon_insert_breakpoint (addr
, contents_cache
)
2369 char *contents_cache
;
2373 if (monitor_supports_breakpoints
)
2375 char tbuff
[12]; /* space for breakpoint command */
2379 /* PMON does not support debug level breakpoint set/remove: */
2380 if (mips_exit_debug ())
2381 mips_error ("Failed to exit debug mode");
2383 sprintf (tbuff
, "b %08x\r", addr
);
2384 mips_send_command (tbuff
, 0);
2386 mips_expect ("Bpt ");
2388 if (!mips_getstring (tbuff
, 2))
2390 tbuff
[2] = '\0'; /* terminate the string */
2391 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2393 fprintf_unfiltered (stderr
, "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2397 mips_expect (" = ");
2399 /* Lead in the hex number we are expecting: */
2403 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2404 which targets return 64-bit addresses? PMON returns only 32! */
2405 if (!mips_getstring (&tbuff
[2], 8))
2407 tbuff
[10] = '\0'; /* terminate the string */
2409 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2411 fprintf_unfiltered (stderr
, "Invalid hex address from target: %s\n", tbuff
);
2415 if (bpnum
>= PMON_MAX_BP
)
2417 fprintf_unfiltered (stderr
, "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2418 bpnum
, PMON_MAX_BP
- 1);
2423 fprintf_unfiltered (stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2425 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2427 mips_expect ("\r\n");
2428 mips_expect (mips_monitor_prompt
);
2430 mips_enter_debug ();
2435 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2439 pmon_remove_breakpoint (addr
, contents_cache
)
2441 char *contents_cache
;
2443 if (monitor_supports_breakpoints
)
2446 char tbuff
[7]; /* enough for delete breakpoint command */
2448 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2449 if (mips_pmon_bp_info
[bpnum
] == addr
)
2452 if (bpnum
>= PMON_MAX_BP
)
2454 fprintf_unfiltered (stderr
,
2455 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2460 if (mips_exit_debug ())
2461 mips_error ("Failed to exit debug mode");
2463 sprintf (tbuff
, "db %02d\r", bpnum
);
2465 mips_send_command (tbuff
, -1);
2466 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2467 set" message will be returned. */
2469 mips_enter_debug ();
2474 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2479 /* Tell whether this target can support a hardware breakpoint. CNT
2480 is the number of hardware breakpoints already installed. This
2481 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2484 remote_mips_can_use_hardware_watchpoint (cnt
)
2487 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2491 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2492 This is used for memory ref breakpoints. */
2494 static unsigned long
2495 calculate_mask (addr
, len
)
2502 mask
= addr
^ (addr
+ len
- 1);
2504 for (i
= 32; i
>= 0; i
--)
2510 mask
= (unsigned long) 0xffffffff >> i
;
2515 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2516 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2520 remote_mips_set_watchpoint (addr
, len
, type
)
2525 if (set_breakpoint (addr
, len
, type
))
2532 remote_mips_remove_watchpoint (addr
, len
, type
)
2537 if (clear_breakpoint (addr
, len
, type
))
2544 remote_mips_stopped_by_watchpoint ()
2546 return hit_watchpoint
;
2550 /* Insert a breakpoint. */
2553 set_breakpoint (addr
, len
, type
)
2556 enum break_type type
;
2558 return common_breakpoint (1, addr
, len
, type
);
2562 /* Clear a breakpoint. */
2565 clear_breakpoint (addr
, len
, type
)
2568 enum break_type type
;
2570 return common_breakpoint (0, addr
, len
, type
);
2574 /* Check the error code from the return packet for an LSI breakpoint
2575 command. If there's no error, just return 0. If it's a warning,
2576 print the warning text and return 0. If it's an error, print
2577 the error text and return 1. <ADDR> is the address of the breakpoint
2578 that was being set. <RERRFLG> is the error code returned by PMON.
2579 This is a helper function for common_breakpoint. */
2582 check_lsi_error (addr
, rerrflg
)
2586 struct lsi_error
*err
;
2587 char *saddr
= paddr_nz (addr
); /* printable address string */
2589 if (rerrflg
== 0) /* no error */
2592 /* Warnings can be ORed together, so check them all. */
2593 if (rerrflg
& W_WARN
)
2595 if (monitor_warnings
)
2598 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2600 if ((err
->code
& rerrflg
) == err
->code
)
2603 fprintf_unfiltered (stderr
,
2604 "common_breakpoint (0x%s): Warning: %s\n",
2610 fprintf_unfiltered (stderr
,
2611 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2618 /* Errors are unique, i.e. can't be ORed together. */
2619 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2621 if ((err
->code
& rerrflg
) == err
->code
)
2623 fprintf_unfiltered (stderr
,
2624 "common_breakpoint (0x%s): Error: %s\n",
2630 fprintf_unfiltered (stderr
,
2631 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2638 /* This routine sends a breakpoint command to the remote target.
2640 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2641 <ADDR> is the address of the breakpoint.
2642 <LEN> the length of the region to break on.
2643 <TYPE> is the type of breakpoint:
2644 0 = write (BREAK_WRITE)
2645 1 = read (BREAK_READ)
2646 2 = read/write (BREAK_ACCESS)
2647 3 = instruction fetch (BREAK_FETCH)
2649 Return 0 if successful; otherwise 1. */
2652 common_breakpoint (set
, addr
, len
, type
)
2656 enum break_type type
;
2658 char buf
[DATA_MAXLEN
+ 1];
2660 int rpid
, rerrflg
, rresponse
, rlen
;
2663 addr
= ADDR_BITS_REMOVE (addr
);
2665 if (mips_monitor
== MON_LSI
)
2667 if (set
== 0) /* clear breakpoint */
2669 /* The LSI PMON "clear breakpoint" has this form:
2670 <pid> 'b' <bptn> 0x0
2672 <pid> 'b' 0x0 <code>
2674 <bptn> is a breakpoint number returned by an earlier 'B' command.
2675 Possible return codes: OK, E_BPT. */
2679 /* Search for the breakpoint in the table. */
2680 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2681 if (lsi_breakpoints
[i
].type
== type
2682 && lsi_breakpoints
[i
].addr
== addr
2683 && lsi_breakpoints
[i
].len
== len
)
2686 /* Clear the table entry and tell PMON to clear the breakpoint. */
2687 if (i
== MAX_LSI_BREAKPOINTS
)
2689 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2694 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2695 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2696 mips_send_packet (buf
, 1);
2698 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2701 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2703 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2705 return (check_lsi_error (addr
, rerrflg
));
2707 else /* set a breakpoint */
2709 /* The LSI PMON "set breakpoint" command has this form:
2710 <pid> 'B' <addr> 0x0
2712 <pid> 'B' <bptn> <code>
2714 The "set data breakpoint" command has this form:
2716 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2718 where: type= "0x1" = read
2720 "0x3" = access (read or write)
2722 The reply returns two values:
2723 bptn - a breakpoint number, which is a small integer with
2724 possible values of zero through 255.
2725 code - an error return code, a value of zero indicates a
2726 succesful completion, other values indicate various
2727 errors and warnings.
2729 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2733 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2736 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2738 else /* watchpoint */
2741 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2742 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2743 paddr_nz (addr
+ len
- 1));
2745 mips_send_packet (buf
, 1);
2747 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2750 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2751 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2752 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2753 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2756 if (check_lsi_error (addr
, rerrflg
))
2759 /* rresponse contains PMON's breakpoint number. Record the
2760 information for this breakpoint so we can clear it later. */
2761 lsi_breakpoints
[rresponse
].type
= type
;
2762 lsi_breakpoints
[rresponse
].addr
= addr
;
2763 lsi_breakpoints
[rresponse
].len
= len
;
2770 /* On non-LSI targets, the breakpoint command has this form:
2771 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2772 <MASK> is a don't care mask for addresses.
2773 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2777 mask
= calculate_mask (addr
, len
);
2780 if (set
) /* set a breakpoint */
2785 case BREAK_WRITE
: /* write */
2788 case BREAK_READ
: /* read */
2791 case BREAK_ACCESS
: /* read/write */
2799 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2800 paddr_nz (mask
), flags
);
2805 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2808 mips_send_packet (buf
, 1);
2810 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2813 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2814 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2816 if (nfields
!= 4 || rcmd
!= cmd
)
2817 mips_error ("common_breakpoint: Bad response from remote board: %s",
2822 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2823 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2824 if (mips_monitor
== MON_DDB
)
2825 rresponse
= rerrflg
;
2826 if (rresponse
!= 22) /* invalid argument */
2827 fprintf_unfiltered (stderr
, "common_breakpoint (0x%s): Got error: 0x%x\n",
2828 paddr_nz (addr
), rresponse
);
2836 send_srec (srec
, len
, addr
)
2845 SERIAL_WRITE (mips_desc
, srec
, len
);
2847 ch
= mips_readchar (2);
2851 case SERIAL_TIMEOUT
:
2852 error ("Timeout during download.");
2856 case 0x15: /* NACK */
2857 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %d! Retrying.\n", addr
);
2860 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2865 /* Download a binary file by converting it to S records. */
2868 mips_load_srec (args
)
2873 char *buffer
, srec
[1024];
2875 unsigned int srec_frame
= 200;
2877 static int hashmark
= 1;
2879 buffer
= alloca (srec_frame
* 2 + 256);
2881 abfd
= bfd_openr (args
, 0);
2884 printf_filtered ("Unable to open file %s\n", args
);
2888 if (bfd_check_format (abfd
, bfd_object
) == 0)
2890 printf_filtered ("File is not an object file\n");
2894 /* This actually causes a download in the IDT binary format: */
2895 mips_send_command (LOAD_CMD
, 0);
2897 for (s
= abfd
->sections
; s
; s
= s
->next
)
2899 if (s
->flags
& SEC_LOAD
)
2901 unsigned int numbytes
;
2903 /* FIXME! vma too small?? */
2904 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, s
->vma
,
2905 s
->vma
+ s
->_raw_size
);
2906 gdb_flush (gdb_stdout
);
2908 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2910 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2912 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2914 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2915 send_srec (srec
, reclen
, s
->vma
+ i
);
2919 putchar_unfiltered ('#');
2920 gdb_flush (gdb_stdout
);
2923 } /* Per-packet (or S-record) loop */
2925 putchar_unfiltered ('\n');
2926 } /* Loadable sections */
2929 putchar_unfiltered ('\n');
2931 /* Write a type 7 terminator record. no data for a type 7, and there
2932 is no data, so len is 0. */
2934 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2936 send_srec (srec
, reclen
, abfd
->start_address
);
2938 SERIAL_FLUSH_INPUT (mips_desc
);
2942 * mips_make_srec -- make an srecord. This writes each line, one at a
2943 * time, each with it's own header and trailer line.
2944 * An srecord looks like this:
2946 * byte count-+ address
2947 * start ---+ | | data +- checksum
2949 * S01000006F6B692D746573742E73726563E4
2950 * S315000448600000000000000000FC00005900000000E9
2951 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2952 * S30B0004485A0000000000004E
2955 * S<type><length><address><data><checksum>
2959 * is the number of bytes following upto the checksum. Note that
2960 * this is not the number of chars following, since it takes two
2961 * chars to represent a byte.
2965 * 1) two byte address data record
2966 * 2) three byte address data record
2967 * 3) four byte address data record
2968 * 7) four byte address termination record
2969 * 8) three byte address termination record
2970 * 9) two byte address termination record
2973 * is the start address of the data following, or in the case of
2974 * a termination record, the start address of the image
2978 * is the sum of all the raw byte data in the record, from the length
2979 * upwards, modulo 256 and subtracted from 255.
2981 * This routine returns the length of the S-record.
2986 mips_make_srec (buf
, type
, memaddr
, myaddr
, len
)
2990 unsigned char *myaddr
;
2993 unsigned char checksum
;
2996 /* Create the header for the srec. addr_size is the number of bytes in the address,
2997 and 1 is the number of bytes in the count. */
2999 /* FIXME!! bigger buf required for 64-bit! */
3002 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
3003 /* This assumes S3 style downloads (4byte addresses). There should
3004 probably be a check, or the code changed to make it more
3006 buf
[3] = memaddr
>> 24;
3007 buf
[4] = memaddr
>> 16;
3008 buf
[5] = memaddr
>> 8;
3010 memcpy (&buf
[7], myaddr
, len
);
3012 /* Note that the checksum is calculated on the raw data, not the
3013 hexified data. It includes the length, address and the data
3014 portions of the packet. */
3016 buf
+= 2; /* Point at length byte */
3017 for (i
= 0; i
< len
+ 4 + 1; i
++)
3025 /* The following manifest controls whether we enable the simple flow
3026 control support provided by the monitor. If enabled the code will
3027 wait for an affirmative ACK between transmitting packets. */
3028 #define DOETXACK (1)
3030 /* The PMON fast-download uses an encoded packet format constructed of
3031 3byte data packets (encoded as 4 printable ASCII characters), and
3032 escape sequences (preceded by a '/'):
3035 'C' compare checksum (12bit value, not included in checksum calculation)
3036 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3037 'Z' zero fill multiple of 3bytes
3038 'B' byte (12bit encoded value, of 8bit data)
3039 'A' address (36bit encoded value)
3040 'E' define entry as original address, and exit load
3042 The packets are processed in 4 character chunks, so the escape
3043 sequences that do not have any data (or variable length data)
3044 should be padded to a 4 character boundary. The decoder will give
3045 an error if the complete message block size is not a multiple of
3046 4bytes (size of record).
3048 The encoding of numbers is done in 6bit fields. The 6bit value is
3049 used to index into this string to get the specific character
3050 encoding for the value: */
3051 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3053 /* Convert the number of bits required into an encoded number, 6bits
3054 at a time (range 0..63). Keep a checksum if required (passed
3055 pointer non-NULL). The function returns the number of encoded
3056 characters written into the buffer. */
3058 pmon_makeb64 (v
, p
, n
, chksum
)
3064 int count
= (n
/ 6);
3066 if ((n
% 12) != 0) {
3067 fprintf_unfiltered(stderr
,"Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n
,(n
== 1)?"":"s");
3071 fprintf_unfiltered(stderr
,"Fast encoding cannot process more than 36bits at the moment: %dbits\n",n
);
3075 /* Deal with the checksum: */
3076 if (chksum
!= NULL
) {
3078 case 36: *chksum
+= ((v
>> 24) & 0xFFF);
3079 case 24: *chksum
+= ((v
>> 12) & 0xFFF);
3080 case 12: *chksum
+= ((v
>> 0) & 0xFFF);
3086 *p
++ = encoding
[(v
>> n
) & 0x3F];
3092 /* Shorthand function (that could be in-lined) to output the zero-fill
3093 escape sequence into the data stream. */
3095 pmon_zeroset (recsize
, buff
, amount
, chksum
)
3099 unsigned int *chksum
;
3103 sprintf(*buff
,"/Z");
3104 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3105 *buff
+= (count
+ 2);
3107 return(recsize
+ count
+ 2);
3111 pmon_checkset (recsize
, buff
, value
)
3118 /* Add the checksum (without updating the value): */
3119 sprintf (*buff
, "/C");
3120 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3121 *buff
+= (count
+ 2);
3122 sprintf (*buff
, "\n");
3123 *buff
+= 2; /* include zero terminator */
3124 /* Forcing a checksum validation clears the sum: */
3126 return(recsize
+ count
+ 3);
3129 /* Amount of padding we leave after at the end of the output buffer,
3130 for the checksum and line termination characters: */
3131 #define CHECKSIZE (4 + 4 + 4 + 2)
3132 /* zero-fill, checksum, transfer end and line termination space. */
3134 /* The amount of binary data loaded from the object file in a single
3136 #define BINCHUNK (1024)
3138 /* Maximum line of data accepted by the monitor: */
3139 #define MAXRECSIZE (550)
3140 /* NOTE: This constant depends on the monitor being used. This value
3141 is for PMON 5.x on the Cogent Vr4300 board. */
3144 pmon_make_fastrec (outbuf
, inbuf
, inptr
, inamount
, recsize
, csum
, zerofill
)
3146 unsigned char *inbuf
;
3151 unsigned int *zerofill
;
3156 /* This is a simple check to ensure that our data will fit within
3157 the maximum allowable record size. Each record output is 4bytes
3158 in length. We must allow space for a pending zero fill command,
3159 the record, and a checksum record. */
3160 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0)) {
3161 /* Process the binary data: */
3162 if ((inamount
- *inptr
) < 3) {
3164 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3166 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3168 *recsize
+= (2 + count
);
3171 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3172 /* Simple check for zero data. TODO: A better check would be
3173 to check the last, and then the middle byte for being zero
3174 (if the first byte is not). We could then check for
3175 following runs of zeros, and if above a certain size it is
3176 worth the 4 or 8 character hit of the byte insertions used
3177 to pad to the start of the zeroes. NOTE: This also depends
3178 on the alignment at the end of the zero run. */
3179 if (value
== 0x00000000) {
3181 if (*zerofill
== 0xFFF) /* 12bit counter */
3182 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3185 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3186 count
= pmon_makeb64 (value
, p
, 24, csum
);
3199 pmon_check_ack(mesg
)
3202 #if defined(DOETXACK)
3207 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
, 2);
3208 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3210 fprintf_unfiltered (gdb_stderr
,
3211 "Failed to receive valid ACK for %s\n", mesg
);
3212 return(-1); /* terminate the download */
3215 #endif /* DOETXACK */
3219 /* pmon_download - Send a sequence of characters to the PMON download port,
3220 which is either a serial port or a UDP socket. */
3223 pmon_start_download ()
3227 /* Create the temporary download file. */
3228 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3229 perror_with_name (tftp_localname
);
3233 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3234 mips_expect ("Downloading from ");
3235 mips_expect (udp_in_use
? "udp" : "tty0");
3236 mips_expect (", ^C to abort\r\n");
3241 mips_expect_download (char *string
)
3243 if (!mips_expect (string
))
3245 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3247 remove (tftp_localname
); /* Remove temporary file */
3255 pmon_end_download (final
, bintotal
)
3259 char hexnumber
[9]; /* includes '\0' space */
3263 static char *load_cmd_prefix
= "load -b -s ";
3267 /* Close off the temporary file containing the load data. */
3271 /* Make the temporary file readable by the world. */
3272 if (stat (tftp_localname
, &stbuf
) == 0)
3273 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3275 /* Must reinitialize the board to prevent PMON from crashing. */
3276 mips_send_command ("initEther\r", -1);
3278 /* Send the load command. */
3279 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3280 strcpy (cmd
, load_cmd_prefix
);
3281 strcat (cmd
, tftp_name
);
3283 mips_send_command (cmd
, 0);
3285 if (!mips_expect_download ("Downloading from "))
3287 if (!mips_expect_download (tftp_name
))
3289 if (!mips_expect_download (", ^C to abort\r\n"))
3293 /* Wait for the stuff that PMON prints after the load has completed.
3294 The timeout value for use in the tftp case (15 seconds) was picked
3295 arbitrarily but might be too small for really large downloads. FIXME. */
3296 if (mips_monitor
== MON_LSI
)
3298 pmon_check_ack ("termination");
3299 mips_expect_timeout ("Entry address is ", tftp_in_use
? 15 : 2);
3302 mips_expect_timeout ("Entry Address = ", tftp_in_use
? 15 : 2);
3304 sprintf (hexnumber
,"%x",final
);
3305 mips_expect (hexnumber
);
3306 mips_expect ("\r\n");
3307 if (mips_monitor
!= MON_LSI
)
3308 pmon_check_ack ("termination");
3309 mips_expect ("\r\ntotal = 0x");
3310 sprintf (hexnumber
,"%x",bintotal
);
3311 mips_expect (hexnumber
);
3312 if (!mips_expect_download (" bytes\r\n"))
3316 remove (tftp_localname
); /* Remove temporary file */
3320 pmon_download (buffer
, length
)
3325 fwrite (buffer
, 1, length
, tftp_file
);
3327 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3331 pmon_load_fast (file
)
3336 unsigned char *binbuf
;
3339 unsigned int csum
= 0;
3340 int hashmark
= !tftp_in_use
;
3345 buffer
= (char *)xmalloc(MAXRECSIZE
+ 1);
3346 binbuf
= (unsigned char *)xmalloc(BINCHUNK
);
3348 abfd
= bfd_openr(file
,0);
3351 printf_filtered ("Unable to open file %s\n",file
);
3355 if (bfd_check_format(abfd
,bfd_object
) == 0)
3357 printf_filtered("File is not an object file\n");
3361 /* Setup the required download state: */
3362 mips_send_command ("set dlproto etxack\r", -1);
3363 mips_send_command ("set dlecho off\r", -1);
3364 /* NOTE: We get a "cannot set variable" message if the variable is
3365 already defined to have the argument we give. The code doesn't
3366 care, since it just scans to the next prompt anyway. */
3367 /* Start the download: */
3368 pmon_start_download();
3370 /* Zero the checksum */
3371 sprintf(buffer
,"/Kxx\n");
3372 reclen
= strlen(buffer
);
3373 pmon_download (buffer
, reclen
);
3374 finished
= pmon_check_ack("/Kxx");
3376 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3377 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3379 bintotal
+= s
->_raw_size
;
3380 final
= (s
->vma
+ s
->_raw_size
);
3382 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int)s
->vma
,
3383 (unsigned int)(s
->vma
+ s
->_raw_size
));
3384 gdb_flush (gdb_stdout
);
3386 /* Output the starting address */
3387 sprintf(buffer
,"/A");
3388 reclen
= pmon_makeb64(s
->vma
,&buffer
[2],36,&csum
);
3389 buffer
[2 + reclen
] = '\n';
3390 buffer
[3 + reclen
] = '\0';
3391 reclen
+= 3; /* for the initial escape code and carriage return */
3392 pmon_download (buffer
, reclen
);
3393 finished
= pmon_check_ack("/A");
3397 unsigned int binamount
;
3398 unsigned int zerofill
= 0;
3404 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
) {
3407 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3409 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3411 /* This keeps a rolling checksum, until we decide to output
3413 for (; ((binamount
- binptr
) > 0);) {
3414 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3415 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
)) {
3416 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3417 pmon_download (buffer
, reclen
);
3418 finished
= pmon_check_ack("data record");
3420 zerofill
= 0; /* do not transmit pending zerofills */
3425 putchar_unfiltered ('#');
3426 gdb_flush (gdb_stdout
);
3430 reclen
= 0; /* buffer processed */
3435 /* Ensure no out-standing zerofill requests: */
3437 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3439 /* and then flush the line: */
3441 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3442 /* Currently pmon_checkset outputs the line terminator by
3443 default, so we write out the buffer so far: */
3444 pmon_download (buffer
, reclen
);
3445 finished
= pmon_check_ack("record remnant");
3449 putchar_unfiltered ('\n');
3452 /* Terminate the transfer. We know that we have an empty output
3453 buffer at this point. */
3454 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3455 reclen
= strlen (buffer
);
3456 pmon_download (buffer
, reclen
);
3458 if (finished
) { /* Ignore the termination message: */
3459 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3460 } else { /* Deal with termination message: */
3461 pmon_end_download (final
, bintotal
);
3467 /* mips_load -- download a file. */
3470 mips_load (file
, from_tty
)
3474 /* Get the board out of remote debugging mode. */
3475 if (mips_exit_debug ())
3476 error ("mips_load: Couldn't get into monitor mode.");
3478 if (mips_monitor
!= MON_IDT
)
3479 pmon_load_fast (file
);
3481 mips_load_srec (file
);
3485 /* Finally, make the PC point at the start address */
3486 if (mips_monitor
!= MON_IDT
)
3488 /* Work around problem where PMON monitor updates the PC after a load
3489 to a different value than GDB thinks it has. The following ensures
3490 that the write_pc() WILL update the PC value: */
3491 register_valid
[PC_REGNUM
] = 0;
3494 write_pc (bfd_get_start_address (exec_bfd
));
3496 inferior_pid
= 0; /* No process now */
3498 /* This is necessary because many things were based on the PC at the time that
3499 we attached to the monitor, which is no longer valid now that we have loaded
3500 new code (and just changed the PC). Another way to do this might be to call
3501 normal_stop, except that the stack may not be valid, and things would get
3502 horribly confused... */
3504 clear_symtab_users ();
3508 /* Pass the command argument as a packet to PMON verbatim. */
3511 pmon_command (args
, from_tty
)
3515 char buf
[DATA_MAXLEN
+ 1];
3518 sprintf (buf
, "0x0 %s", args
);
3519 mips_send_packet (buf
, 1);
3520 printf_filtered ("Send packet: %s\n", buf
);
3522 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3524 printf_filtered ("Received packet: %s\n", buf
);
3528 _initialize_remote_mips ()
3530 /* Initialize the fields in mips_ops that are common to all four targets. */
3531 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3532 mips_ops
.to_close
= mips_close
;
3533 mips_ops
.to_detach
= mips_detach
;
3534 mips_ops
.to_resume
= mips_resume
;
3535 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3536 mips_ops
.to_store_registers
= mips_store_registers
;
3537 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3538 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3539 mips_ops
.to_files_info
= mips_files_info
;
3540 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3541 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3542 mips_ops
.to_kill
= mips_kill
;
3543 mips_ops
.to_load
= mips_load
;
3544 mips_ops
.to_create_inferior
= mips_create_inferior
;
3545 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3546 mips_ops
.to_stratum
= process_stratum
;
3547 mips_ops
.to_has_all_memory
= 1;
3548 mips_ops
.to_has_memory
= 1;
3549 mips_ops
.to_has_stack
= 1;
3550 mips_ops
.to_has_registers
= 1;
3551 mips_ops
.to_has_execution
= 1;
3552 mips_ops
.to_magic
= OPS_MAGIC
;
3554 /* Copy the common fields to all four target vectors. */
3555 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3557 /* Initialize target-specific fields in the target vectors. */
3558 mips_ops
.to_shortname
= "mips";
3559 mips_ops
.to_doc
= "\
3560 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3561 The argument is the device it is connected to or, if it contains a colon,\n\
3562 HOST:PORT to access a board over a network";
3563 mips_ops
.to_open
= mips_open
;
3564 mips_ops
.to_wait
= mips_wait
;
3566 pmon_ops
.to_shortname
= "pmon";
3567 pmon_ops
.to_doc
= "\
3568 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3569 line. The argument is the device it is connected to or, if it contains a\n\
3570 colon, HOST:PORT to access a board over a network";
3571 pmon_ops
.to_open
= pmon_open
;
3572 pmon_ops
.to_wait
= mips_wait
;
3574 ddb_ops
.to_shortname
= "ddb";
3576 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3577 line. The first argument is the device it is connected to or, if it contains\n\
3578 a colon, HOST:PORT to access a board over a network. The optional second\n\
3579 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3580 TFTP downloads to the board. The optional third parameter is the local\n\
3581 of the TFTP temporary file, if it differs from the filename seen by the board";
3582 ddb_ops
.to_open
= ddb_open
;
3583 ddb_ops
.to_wait
= mips_wait
;
3585 lsi_ops
.to_shortname
= "lsi";
3586 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3587 lsi_ops
.to_open
= lsi_open
;
3588 lsi_ops
.to_wait
= mips_wait
;
3590 /* Add the targets. */
3591 add_target (&mips_ops
);
3592 add_target (&pmon_ops
);
3593 add_target (&ddb_ops
);
3594 add_target (&lsi_ops
);
3597 add_set_cmd ("timeout", no_class
, var_zinteger
,
3598 (char *) &mips_receive_wait
,
3599 "Set timeout in seconds for remote MIPS serial I/O.",
3604 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3605 (char *) &mips_retransmit_wait
,
3606 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3607 This is the number of seconds to wait for an acknowledgement to a packet\n\
3608 before resending the packet.", &setlist
),
3612 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3613 (char *) &mips_syn_garbage
,
3614 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3615 This is the maximum number of characters GDB will ignore when trying to\n\
3616 synchronize with the remote system. A value of -1 means that there is no limit\n\
3617 (Note that these characters are printed out even though they are ignored.)",
3622 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3623 (char *) &mips_monitor_prompt
,
3624 "Set the prompt that GDB expects from the monitor.",
3629 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3630 (char *)&monitor_warnings
,
3631 "Set printing of monitor warnings.\n"
3632 "When enabled, monitor warnings about hardware breakpoints "
3633 "will be displayed.",
3637 add_com ("pmon <command>", class_obscure
, pmon_command
,
3638 "Send a packet to PMON (must be in debug mode).");