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/>. */
32 #include "exceptions.h"
35 #include "gdb_usleep.h"
38 #include "mips-tdep.h"
39 #include "gdbthread.h"
43 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
44 types passed by breakpoint.c to target_insert_watchpoint.
45 Value 3 is our own invention, and is used for ordinary instruction
46 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
56 /* Prototypes for local functions. */
58 static int mips_readchar (int timeout
);
60 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
63 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
64 int *pch
, int timeout
);
66 static int mips_cksum (const unsigned char *hdr
,
67 const char *data
, int len
);
69 static void mips_send_packet (const char *s
, int get_ack
);
71 static void mips_send_command (const char *cmd
, int prompt
);
73 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
75 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
76 int *perr
, int timeout
, char *buff
);
78 static void mips_initialize (void);
80 static void mips_close (struct target_ops
*self
);
82 static int mips_map_regno (struct gdbarch
*, int);
84 static void mips_set_register (int regno
, ULONGEST value
);
86 static void mips_prepare_to_store (struct target_ops
*self
,
87 struct regcache
*regcache
);
89 static int mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
);
91 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
94 static enum target_xfer_status
mips_xfer_memory (gdb_byte
*readbuf
,
95 const gdb_byte
*writebuf
,
98 ULONGEST
*xfered_len
);
100 static void mips_files_info (struct target_ops
*ignore
);
102 static void mips_mourn_inferior (struct target_ops
*ops
);
104 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, unsigned int *chksum
);
106 static int pmon_zeroset (int recsize
, char **buff
, unsigned int *amount
,
107 unsigned int *chksum
);
109 static int pmon_checkset (int recsize
, char **buff
, unsigned int *value
);
111 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
112 int *inptr
, int inamount
, int *recsize
,
113 unsigned int *csum
, unsigned int *zerofill
);
115 static int pmon_check_ack (char *mesg
);
117 static void pmon_start_download (void);
119 static void pmon_end_download (int final
, int bintotal
);
121 static void pmon_download (char *buffer
, int length
);
123 static void mips_load (struct target_ops
*self
, const char *file
, int from_tty
);
125 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
126 unsigned char *myaddr
, int len
);
128 static int mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
130 static int mips_clear_breakpoint (CORE_ADDR addr
, int len
,
131 enum break_type type
);
133 static int mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
,
134 enum break_type type
);
136 /* Forward declarations. */
137 extern struct target_ops mips_ops
;
138 extern struct target_ops pmon_ops
;
139 extern struct target_ops ddb_ops
;
140 extern struct target_ops rockhopper_ops
;
142 /* The MIPS remote debugging interface is built on top of a simple
143 packet protocol. Each packet is organized as follows:
145 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
146 may not appear anywhere else in the packet. Any time a SYN is
147 seen, a new packet should be assumed to have begun.
150 This byte contains the upper five bits of the logical length
151 of the data section, plus a single bit indicating whether this
152 is a data packet or an acknowledgement. The documentation
153 indicates that this bit is 1 for a data packet, but the actual
154 board uses 1 for an acknowledgement. The value of the byte is
155 0x40 + (ack ? 0x20 : 0) + (len >> 6)
156 (we always have 0 <= len < 1024). Acknowledgement packets do
157 not carry data, and must have a data length of 0.
159 LEN1 This byte contains the lower six bits of the logical length of
160 the data section. The value is
163 SEQ This byte contains the six bit sequence number of the packet.
166 An acknowlegment packet contains the sequence number of the
167 packet being acknowledged plus 1 modulo 64. Data packets are
168 transmitted in sequence. There may only be one outstanding
169 unacknowledged data packet at a time. The sequence numbers
170 are independent in each direction. If an acknowledgement for
171 the previous packet is received (i.e., an acknowledgement with
172 the sequence number of the packet just sent) the packet just
173 sent should be retransmitted. If no acknowledgement is
174 received within a timeout period, the packet should be
175 retransmitted. This has an unfortunate failure condition on a
176 high-latency line, as a delayed acknowledgement may lead to an
177 endless series of duplicate packets.
179 DATA The actual data bytes follow. The following characters are
180 escaped inline with DLE (ASCII 020, or ^P):
186 The additional DLE characters are not counted in the logical
187 length stored in the TYPE_LEN and LEN1 bytes.
192 These bytes contain an 18 bit checksum of the complete
193 contents of the packet excluding the SEQ byte and the
194 CSUM[123] bytes. The checksum is simply the twos complement
195 addition of all the bytes treated as unsigned characters. The
196 values of the checksum bytes are:
197 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
198 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
199 CSUM3: 0x40 + (cksum & 0x3f)
201 It happens that the MIPS remote debugging protocol always
202 communicates with ASCII strings. Because of this, this
203 implementation doesn't bother to handle the DLE quoting mechanism,
204 since it will never be required. */
208 /* The SYN character which starts each packet. */
211 /* The 0x40 used to offset each packet (this value ensures that all of
212 the header and trailer bytes, other than SYN, are printable ASCII
214 #define HDR_OFFSET 0x40
216 /* The indices of the bytes in the packet header. */
217 #define HDR_INDX_SYN 0
218 #define HDR_INDX_TYPE_LEN 1
219 #define HDR_INDX_LEN1 2
220 #define HDR_INDX_SEQ 3
223 /* The data/ack bit in the TYPE_LEN header byte. */
224 #define TYPE_LEN_DA_BIT 0x20
225 #define TYPE_LEN_DATA 0
226 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
228 /* How to compute the header bytes. */
229 #define HDR_SET_SYN(data, len, seq) (SYN)
230 #define HDR_SET_TYPE_LEN(data, len, seq) \
232 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
233 + (((len) >> 6) & 0x1f))
234 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
235 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
237 /* Check that a header byte is reasonable. */
238 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
240 /* Get data from the header. These macros evaluate their argument
242 #define HDR_IS_DATA(hdr) \
243 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
244 #define HDR_GET_LEN(hdr) \
245 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
246 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
248 /* The maximum data length. */
249 #define DATA_MAXLEN 1023
251 /* The trailer offset. */
252 #define TRLR_OFFSET HDR_OFFSET
254 /* The indices of the bytes in the packet trailer. */
255 #define TRLR_INDX_CSUM1 0
256 #define TRLR_INDX_CSUM2 1
257 #define TRLR_INDX_CSUM3 2
258 #define TRLR_LENGTH 3
260 /* How to compute the trailer bytes. */
261 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
262 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
263 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
265 /* Check that a trailer byte is reasonable. */
266 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
268 /* Get data from the trailer. This evaluates its argument multiple
270 #define TRLR_GET_CKSUM(trlr) \
271 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
272 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
273 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
275 /* The sequence number modulos. */
276 #define SEQ_MODULOS (64)
278 /* PMON commands to load from the serial port or UDP socket. */
279 #define LOAD_CMD "load -b -s tty0\r"
280 #define LOAD_CMD_UDP "load -b -s udp\r"
282 /* The target vectors for the four different remote MIPS targets.
283 These are initialized with code in _initialize_remote_mips instead
284 of static initializers, to make it easier to extend the target_ops
286 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, rockhopper_ops
, lsi_ops
;
288 enum mips_monitor_type
290 /* IDT/SIM monitor being used: */
292 /* PMON monitor being used: */
293 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET]
294 Algorithmics Ltd. Nov 9 1995 17:19:50 */
295 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET]
296 Risq Modular Systems,
297 Thu Jun 6 09:28:40 PDT 1996 */
298 MON_LSI
, /* 4.3.12 [EB,FP],
299 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
301 /* Last and unused value, for sizing vectors, etc. */
304 static enum mips_monitor_type mips_monitor
= MON_LAST
;
306 /* The monitor prompt text. If the user sets the PMON prompt
307 to some new value, the GDB `set monitor-prompt' command must also
308 be used to inform GDB about the expected prompt. Otherwise, GDB
309 will not be able to connect to PMON in mips_initialize().
310 If the `set monitor-prompt' command is not used, the expected
311 default prompt will be set according the target:
318 static char *mips_monitor_prompt
;
320 /* Set to 1 if the target is open. */
321 static int mips_is_open
;
323 /* Currently active target description (if mips_is_open == 1). */
324 static struct target_ops
*current_ops
;
326 /* Set to 1 while the connection is being initialized. */
327 static int mips_initializing
;
329 /* Set to 1 while the connection is being brought down. */
330 static int mips_exiting
;
332 /* The next sequence number to send. */
333 static unsigned int mips_send_seq
;
335 /* The next sequence number we expect to receive. */
336 static unsigned int mips_receive_seq
;
338 /* The time to wait before retransmitting a packet, in seconds. */
339 static int mips_retransmit_wait
= 3;
341 /* The number of times to try retransmitting a packet before giving up. */
342 static int mips_send_retries
= 10;
344 /* The number of garbage characters to accept when looking for an
345 SYN for the next packet. */
346 static int mips_syn_garbage
= 10;
348 /* The time to wait for a packet, in seconds. */
349 static int mips_receive_wait
= 5;
351 /* Set if we have sent a packet to the board but have not yet received
353 static int mips_need_reply
= 0;
355 /* Handle used to access serial I/O stream. */
356 static struct serial
*mips_desc
;
358 /* UDP handle used to download files to target. */
359 static struct serial
*udp_desc
;
360 static int udp_in_use
;
362 /* TFTP filename used to download files to DDB board, in the form
364 static char *tftp_name
; /* host:filename */
365 static char *tftp_localname
; /* filename portion of above */
366 static int tftp_in_use
;
367 static FILE *tftp_file
;
369 /* Counts the number of times the user tried to interrupt the target (usually
371 static int interrupt_count
;
373 /* If non-zero, means that the target is running. */
374 static int mips_wait_flag
= 0;
376 /* If non-zero, monitor supports breakpoint commands. */
377 static int monitor_supports_breakpoints
= 0;
379 /* Data cache header. */
381 #if 0 /* not used (yet?) */
382 static DCACHE
*mips_dcache
;
385 /* Non-zero means that we've just hit a read or write watchpoint. */
386 static int hit_watchpoint
;
388 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
389 The table is indexed by a breakpoint number, which is an integer
390 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
392 #define MAX_LSI_BREAKPOINTS 256
393 struct lsi_breakpoint_info
395 enum break_type type
; /* type of breakpoint */
396 CORE_ADDR addr
; /* address of breakpoint */
397 int len
; /* length of region being watched */
398 unsigned long value
; /* value to watch */
400 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
402 /* Error/warning codes returned by LSI PMON for breakpoint commands.
403 Warning values may be ORed together; error values may not. */
404 #define W_WARN 0x100 /* This bit is set if the error code
406 #define W_MSK 0x101 /* warning: Range feature is supported
408 #define W_VAL 0x102 /* warning: Value check is not
409 supported in hardware */
410 #define W_QAL 0x104 /* warning: Requested qualifiers are
411 not supported in hardware */
413 #define E_ERR 0x200 /* This bit is set if the error code
415 #define E_BPT 0x200 /* error: No such breakpoint number */
416 #define E_RGE 0x201 /* error: Range is not supported */
417 #define E_QAL 0x202 /* error: The requested qualifiers can
419 #define E_OUT 0x203 /* error: Out of hardware resources */
420 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
424 int code
; /* error code */
425 char *string
; /* string associated with this code */
428 struct lsi_error lsi_warning_table
[] =
430 {W_MSK
, "Range feature is supported via mask"},
431 {W_VAL
, "Value check is not supported in hardware"},
432 {W_QAL
, "Requested qualifiers are not supported in hardware"},
436 struct lsi_error lsi_error_table
[] =
438 {E_BPT
, "No such breakpoint number"},
439 {E_RGE
, "Range is not supported"},
440 {E_QAL
, "The requested qualifiers can not be used"},
441 {E_OUT
, "Out of hardware resources"},
442 {E_NON
, "Hardware breakpoint not supported"},
446 /* Set to 1 with the 'set monitor-warnings' command to enable printing
447 of warnings returned by PMON when hardware breakpoints are used. */
448 static int monitor_warnings
;
450 /* This is the ptid we use while we're connected to the remote. Its
451 value is arbitrary, as the remote-mips target doesn't have a notion of
452 processes or threads, but we need something non-null to place in
454 static ptid_t remote_mips_ptid
;
456 /* Close any ports which might be open. Reset certain globals indicating
457 the state of those ports. */
463 serial_close (mips_desc
);
467 serial_close (udp_desc
);
473 /* Handle low-level error that we can't recover from. Note that just
474 error()ing out from target_wait or some such low-level place will cause
475 all hell to break loose--the rest of GDB will tend to get left in an
476 inconsistent state. */
478 static void ATTRIBUTE_NORETURN
479 mips_error (char *string
,...)
484 target_terminal_ours ();
485 wrap_here (""); /* Force out any buffered output. */
486 gdb_flush (gdb_stdout
);
487 gdb_flush (gdb_stderr
);
489 /* Clean up in such a way that mips_close won't try to talk to the
490 board (it almost surely won't work since we weren't able to talk to
494 if (!ptid_equal (inferior_ptid
, null_ptid
))
495 target_mourn_inferior ();
497 fmt
= concat (_("Ending remote MIPS debugging: "),
498 string
, (char *) NULL
);
499 make_cleanup (xfree
, fmt
);
501 va_start (args
, string
);
502 throw_verror (TARGET_CLOSE_ERROR
, fmt
, args
);
506 /* putc_readable - print a character, displaying non-printable chars in
507 ^x notation or in hex. */
510 fputc_readable (int ch
, struct ui_file
*file
)
513 fputc_unfiltered ('\n', file
);
515 fprintf_unfiltered (file
, "\\r");
516 else if (ch
< 0x20) /* ASCII control character */
517 fprintf_unfiltered (file
, "^%c", ch
+ '@');
518 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
519 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
521 fputc_unfiltered (ch
, file
);
525 /* puts_readable - print a string, displaying non-printable chars in
526 ^x notation or in hex. */
529 fputs_readable (const char *string
, struct ui_file
*file
)
533 while ((c
= *string
++) != '\0')
534 fputc_readable (c
, file
);
538 /* Read P as a hex value. Return true if every character made sense,
539 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
542 read_hex_value (const char *p
, ULONGEST
*result
)
550 if (*p
>= '0' && *p
<= '9')
552 else if (*p
>= 'A' && *p
<= 'F')
553 retval
|= *p
- 'A' + 10;
554 else if (*p
>= 'a' && *p
<= 'f')
555 retval
|= *p
- 'a' + 10;
565 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
566 timed out. TIMEOUT specifies timeout value in seconds. */
569 mips_expect_timeout (const char *string
, int timeout
)
571 const char *p
= string
;
575 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
576 fputs_readable (string
, gdb_stdlog
);
577 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
586 /* Must use serial_readchar() here cuz mips_readchar would get
587 confused if we were waiting for the mips_monitor_prompt... */
589 c
= serial_readchar (mips_desc
, timeout
);
591 if (c
== SERIAL_TIMEOUT
)
594 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
599 fputc_readable (c
, gdb_stdlog
);
607 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
620 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
621 timed out. The timeout value is hard-coded to 2 seconds. Use
622 mips_expect_timeout if a different timeout value is needed. */
625 mips_expect (const char *string
)
627 return mips_expect_timeout (string
, remote_timeout
);
630 /* Read a character from the remote, aborting on error. Returns
631 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
632 returns). FIXME: If we see the string mips_monitor_prompt from the
633 board, then we are debugging on the main console port, and we have
634 somehow dropped out of remote debugging mode. In this case, we
635 automatically go back in to remote debugging mode. This is a hack,
636 put in because I can't find any way for a program running on the
637 remote board to terminate without also ending remote debugging
638 mode. I assume users won't have any trouble with this; for one
639 thing, the IDT documentation generally assumes that the remote
640 debugging port is not the console port. This is, however, very
641 convenient for DejaGnu when you only have one connected serial
645 mips_readchar (int timeout
)
648 static int state
= 0;
649 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
651 { /* FIXME this whole block is dead code! */
655 if (i
== -1 && watchdog
> 0)
659 if (state
== mips_monitor_prompt_len
)
661 ch
= serial_readchar (mips_desc
, timeout
);
663 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off. */
665 target_mourn_inferior ();
666 error (_("Watchdog has expired. Target detached."));
669 if (ch
== SERIAL_EOF
)
670 mips_error (_("End of file from remote"));
671 if (ch
== SERIAL_ERROR
)
672 mips_error (_("Error reading from remote: %s"), safe_strerror (errno
));
673 if (remote_debug
> 1)
675 /* Don't use _filtered; we can't deal with a QUIT out of
676 target_wait, and I think this might be called from there. */
677 if (ch
!= SERIAL_TIMEOUT
)
678 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
680 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
683 /* If we have seen mips_monitor_prompt and we either time out, or
684 we see a @ (which was echoed from a packet we sent), reset the
685 board as described above. The first character in a packet after
686 the SYN (which is not echoed) is always an @ unless the packet is
687 more than 64 characters long, which ours never are. */
688 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
689 && state
== mips_monitor_prompt_len
690 && !mips_initializing
693 if (remote_debug
> 0)
694 /* Don't use _filtered; we can't deal with a QUIT out of
695 target_wait, and I think this might be called from there. */
696 fprintf_unfiltered (gdb_stdlog
,
697 "Reinitializing MIPS debugging mode\n");
704 /* At this point, about the only thing we can do is abort the command
705 in progress and get back to command level as quickly as possible. */
707 error (_("Remote board reset, debug protocol re-initialized."));
710 if (ch
== mips_monitor_prompt
[state
])
718 /* Get a packet header, putting the data in the supplied buffer.
719 PGARBAGE is a pointer to the number of garbage characters received
720 so far. CH is the last character received. Returns 0 for success,
721 or -1 for timeout. */
724 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
730 /* Wait for a SYN. mips_syn_garbage is intended to prevent
731 sitting here indefinitely if the board sends us one garbage
732 character per second. ch may already have a value from the
733 last time through the loop. */
736 ch
= mips_readchar (timeout
);
737 if (ch
== SERIAL_TIMEOUT
)
741 /* Printing the character here lets the user of gdb see
742 what the program is outputting, if the debugging is
743 being done on the console port. Don't use _filtered:
744 we can't deal with a QUIT out of target_wait and
745 buffered target output confuses the user. */
746 if (!mips_initializing
|| remote_debug
> 0)
748 if (isprint (ch
) || isspace (ch
))
750 fputc_unfiltered (ch
, gdb_stdtarg
);
754 fputc_readable (ch
, gdb_stdtarg
);
756 gdb_flush (gdb_stdtarg
);
759 /* Only count unprintable characters. */
760 if (! (isprint (ch
) || isspace (ch
)))
763 if (mips_syn_garbage
> 0
764 && *pgarbage
> mips_syn_garbage
)
765 mips_error (_("Debug protocol failure: more "
766 "than %d characters before a sync."),
771 /* Get the packet header following the SYN. */
772 for (i
= 1; i
< HDR_LENGTH
; i
++)
774 ch
= mips_readchar (timeout
);
775 if (ch
== SERIAL_TIMEOUT
)
777 /* Make sure this is a header byte. */
778 if (ch
== SYN
|| !HDR_CHECK (ch
))
784 /* If we got the complete header, we can return. Otherwise we
785 loop around and keep looking for SYN. */
791 /* Get a packet header, putting the data in the supplied buffer.
792 PGARBAGE is a pointer to the number of garbage characters received
793 so far. The last character read is returned in *PCH. Returns 0
794 for success, -1 for timeout, -2 for error. */
797 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
798 int *pch
, int timeout
)
803 for (i
= 0; i
< TRLR_LENGTH
; i
++)
805 ch
= mips_readchar (timeout
);
807 if (ch
== SERIAL_TIMEOUT
)
809 if (!TRLR_CHECK (ch
))
816 /* Get the checksum of a packet. HDR points to the packet header.
817 DATASTR points to the packet data. LEN is the length of DATASTR. */
820 mips_cksum (const unsigned char *hdr
, const char *datastr
, int len
)
822 const unsigned char *p
;
823 const unsigned char *data
= (const unsigned char *) datastr
;
829 /* The initial SYN is not included in the checksum. */
843 /* Send a packet containing the given ASCII string. */
846 mips_send_packet (const char *s
, int get_ack
)
848 /* unsigned */ int len
;
849 unsigned char *packet
;
854 if (len
> DATA_MAXLEN
)
855 mips_error (_("MIPS protocol data packet too long: %s"), s
);
857 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
859 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
860 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
861 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
862 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
864 memcpy (packet
+ HDR_LENGTH
, s
, len
);
866 cksum
= mips_cksum (packet
, (char *) packet
+ HDR_LENGTH
, len
);
867 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
868 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
869 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
871 /* Increment the sequence number. This will set mips_send_seq to
872 the sequence number we expect in the acknowledgement. */
873 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
875 /* We can only have one outstanding data packet, so we just wait for
876 the acknowledgement here. Keep retransmitting the packet until
877 we get one, or until we've tried too many times. */
878 for (try = 0; try < mips_send_retries
; try++)
883 if (remote_debug
> 0)
885 /* Don't use _filtered; we can't deal with a QUIT out of
886 target_wait, and I think this might be called from there. */
887 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
888 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
891 if (serial_write (mips_desc
, packet
,
892 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
893 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
902 unsigned char hdr
[HDR_LENGTH
+ 1];
903 unsigned char trlr
[TRLR_LENGTH
+ 1];
907 /* Get the packet header. If we time out, resend the data
909 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
915 /* If we get a data packet, assume it is a duplicate and
916 ignore it. FIXME: If the acknowledgement is lost, this
917 data packet may be the packet the remote sends after the
919 if (HDR_IS_DATA (hdr
))
923 /* Ignore any errors raised whilst attempting to ignore
926 len
= HDR_GET_LEN (hdr
);
928 for (i
= 0; i
< len
; i
++)
932 rch
= mips_readchar (remote_timeout
);
938 if (rch
== SERIAL_TIMEOUT
)
940 /* Ignore the character. */
944 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
947 /* We don't bother checking the checksum, or providing an
948 ACK to the packet. */
952 /* If the length is not 0, this is a garbled packet. */
953 if (HDR_GET_LEN (hdr
) != 0)
956 /* Get the packet trailer. */
957 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
958 mips_retransmit_wait
);
960 /* If we timed out, resend the data packet. */
964 /* If we got a bad character, reread the header. */
968 /* If the checksum does not match the trailer checksum, this
969 is a bad packet; ignore it. */
970 if (mips_cksum (hdr
, NULL
, 0) != TRLR_GET_CKSUM (trlr
))
973 if (remote_debug
> 0)
975 hdr
[HDR_LENGTH
] = '\0';
976 trlr
[TRLR_LENGTH
] = '\0';
977 /* Don't use _filtered; we can't deal with a QUIT out of
978 target_wait, and I think this might be called from there. */
979 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
980 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
983 /* If this ack is for the current packet, we're done. */
984 seq
= HDR_GET_SEQ (hdr
);
985 if (seq
== mips_send_seq
)
988 /* If this ack is for the last packet, resend the current
990 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
993 /* Otherwise this is a bad ack; ignore it. Increment the
994 garbage count to ensure that we do not stay in this loop
1000 mips_error (_("Remote did not acknowledge packet"));
1003 /* Receive and acknowledge a packet, returning the data in BUFF (which
1004 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1005 implies that only the sender retransmits packets, so this code just
1006 waits silently for a packet. It returns the length of the received
1007 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1008 don't print an error message and return -1. */
1011 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1016 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1023 unsigned char hdr
[HDR_LENGTH
];
1024 unsigned char trlr
[TRLR_LENGTH
];
1028 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1031 mips_error (_("Timed out waiting for remote packet"));
1038 /* An acknowledgement is probably a duplicate; ignore it. */
1039 if (!HDR_IS_DATA (hdr
))
1041 len
= HDR_GET_LEN (hdr
);
1042 /* Check if the length is valid for an ACK, we may aswell
1043 try and read the remainder of the packet: */
1046 /* Ignore the error condition, since we are going to
1047 ignore the packet anyway. */
1048 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1050 /* Don't use _filtered; we can't deal with a QUIT out of
1051 target_wait, and I think this might be called from there. */
1052 if (remote_debug
> 0)
1053 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1057 len
= HDR_GET_LEN (hdr
);
1058 for (i
= 0; i
< len
; i
++)
1062 rch
= mips_readchar (timeout
);
1068 if (rch
== SERIAL_TIMEOUT
)
1071 mips_error (_("Timed out waiting for remote packet"));
1080 /* Don't use _filtered; we can't deal with a QUIT out of
1081 target_wait, and I think this might be called from there. */
1082 if (remote_debug
> 0)
1083 fprintf_unfiltered (gdb_stdlog
,
1084 "Got new SYN after %d chars (wanted %d)\n",
1089 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1093 mips_error (_("Timed out waiting for packet"));
1099 /* Don't use _filtered; we can't deal with a QUIT out of
1100 target_wait, and I think this might be called from there. */
1101 if (remote_debug
> 0)
1102 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1106 /* If this is the wrong sequence number, ignore it. */
1107 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1109 /* Don't use _filtered; we can't deal with a QUIT out of
1110 target_wait, and I think this might be called from there. */
1111 if (remote_debug
> 0)
1112 fprintf_unfiltered (gdb_stdlog
,
1113 "Ignoring sequence number %d (want %d)\n",
1114 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1118 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1121 if (remote_debug
> 0)
1122 /* Don't use _filtered; we can't deal with a QUIT out of
1123 target_wait, and I think this might be called from there. */
1124 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1125 mips_cksum (hdr
, buff
, len
),
1126 TRLR_GET_CKSUM (trlr
));
1128 /* The checksum failed. Send an acknowledgement for the
1129 previous packet to tell the remote to resend the packet. */
1130 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1131 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1132 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1133 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1135 cksum
= mips_cksum (ack
, NULL
, 0);
1137 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1138 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1139 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1141 if (remote_debug
> 0)
1143 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1144 /* Don't use _filtered; we can't deal with a QUIT out of
1145 target_wait, and I think this might be called from there. */
1146 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1150 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1153 mips_error (_("write to target failed: %s"),
1154 safe_strerror (errno
));
1160 if (remote_debug
> 0)
1163 /* Don't use _filtered; we can't deal with a QUIT out of
1164 target_wait, and I think this might be called from there. */
1165 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1168 /* We got the packet. Send an acknowledgement. */
1169 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1171 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1172 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1173 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1174 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1176 cksum
= mips_cksum (ack
, NULL
, 0);
1178 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1179 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1180 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1182 if (remote_debug
> 0)
1184 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\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 ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1191 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1194 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
1202 /* Optionally send a request to the remote system and optionally wait
1203 for the reply. This implements the remote debugging protocol,
1204 which is built on top of the packet protocol defined above. Each
1205 request has an ADDR argument and a DATA argument. The following
1206 requests are defined:
1208 \0 don't send a request; just wait for a reply
1209 i read word from instruction space at ADDR
1210 d read word from data space at ADDR
1211 I write DATA to instruction space at ADDR
1212 D write DATA to data space at ADDR
1213 r read register number ADDR
1214 R set register number ADDR to value DATA
1215 c continue execution (if ADDR != 1, set pc to ADDR)
1216 s single step (if ADDR != 1, set pc to ADDR)
1218 The read requests return the value requested. The write requests
1219 return the previous value in the changed location. The execution
1220 requests return a UNIX wait value (the approximate signal which
1221 caused execution to stop is in the upper eight bits).
1223 If PERR is not NULL, this function waits for a reply. If an error
1224 occurs, it sets *PERR to 1 and sets errno according to what the
1225 target board reports. */
1228 mips_request (int cmd
,
1235 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
1236 char myBuff
[DATA_MAXLEN
+ 1];
1237 char response_string
[17];
1244 if (buff
== (char *) NULL
)
1249 if (mips_need_reply
)
1250 internal_error (__FILE__
, __LINE__
,
1251 _("mips_request: Trying to send "
1252 "command before reply"));
1253 /* 'T' sets a register to a 64-bit value, so make sure we use
1254 the right conversion function. */
1256 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1257 phex_nz (addr
, addr_size
), phex_nz (data
, 8));
1259 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1260 phex_nz (addr
, addr_size
), phex_nz (data
, addr_size
));
1262 mips_send_packet (buff
, 1);
1263 mips_need_reply
= 1;
1266 if (perr
== (int *) NULL
)
1269 if (!mips_need_reply
)
1270 internal_error (__FILE__
, __LINE__
,
1271 _("mips_request: Trying to get reply before command"));
1273 mips_need_reply
= 0;
1275 len
= mips_receive_packet (buff
, 1, timeout
);
1278 if (sscanf (buff
, "0x%x %c 0x%x 0x%16s",
1279 &rpid
, &rcmd
, &rerrflg
, response_string
) != 4
1280 || !read_hex_value (response_string
, &rresponse
)
1281 || (cmd
!= '\0' && rcmd
!= cmd
))
1282 mips_error (_("Bad response from remote board"));
1288 /* FIXME: This will returns MIPS errno numbers, which may or may
1289 not be the same as errno values used on other systems. If
1290 they stick to common errno values, they will be the same, but
1291 if they don't, they must be translated. */
1301 /* Cleanup associated with mips_initialize(). */
1304 mips_initialize_cleanups (void *arg
)
1306 mips_initializing
= 0;
1309 /* Cleanup associated with mips_exit_debug(). */
1312 mips_exit_cleanups (void *arg
)
1317 /* Send a command and wait for that command to be echoed back. Wait,
1318 too, for the following prompt. */
1321 mips_send_command (const char *cmd
, int prompt
)
1323 serial_write (mips_desc
, cmd
, strlen (cmd
));
1327 mips_expect (mips_monitor_prompt
);
1330 /* Enter remote (dbx) debug mode: */
1333 mips_enter_debug (void)
1335 /* Reset the sequence numbers, ready for the new debug sequence: */
1337 mips_receive_seq
= 0;
1339 if (mips_monitor
!= MON_IDT
)
1340 mips_send_command ("debug\r", 0);
1341 else /* Assume IDT monitor by default. */
1342 mips_send_command ("db tty0\r", 0);
1344 gdb_usleep (1000000);
1345 serial_write (mips_desc
, "\r", sizeof "\r" - 1);
1347 /* We don't need to absorb any spurious characters here, since the
1348 mips_receive_header will eat up a reasonable number of characters
1349 whilst looking for the SYN, however this avoids the "garbage"
1350 being displayed to the user. */
1351 if (mips_monitor
!= MON_IDT
)
1355 char buff
[DATA_MAXLEN
+ 1];
1357 if (mips_receive_packet (buff
, 1, 3) < 0)
1358 mips_error (_("Failed to initialize (didn't receive packet)."));
1362 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1365 mips_exit_debug (void)
1368 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1372 if (mips_monitor
!= MON_IDT
&& mips_monitor
!= MON_ROCKHOPPER
)
1374 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1375 so we do not get a reply to this command: */
1376 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1377 mips_need_reply
= 0;
1378 if (!mips_expect (" break!"))
1380 do_cleanups (old_cleanups
);
1385 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1387 if (!mips_expect (mips_monitor_prompt
))
1389 do_cleanups (old_cleanups
);
1393 do_cleanups (old_cleanups
);
1398 /* Initialize a new connection to the MIPS board, and make sure we are
1399 really connected. */
1402 mips_initialize (void)
1405 struct cleanup
*old_cleanups
;
1408 /* What is this code doing here? I don't see any way it can happen, and
1409 it might mean mips_initializing didn't get cleared properly.
1410 So I'll make it a warning. */
1412 if (mips_initializing
)
1414 warning (_("internal error: mips_initialize called twice"));
1418 old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1421 mips_initializing
= 1;
1423 /* At this point, the packit protocol isn't responding. We'll try getting
1424 into the monitor, and restarting the protocol. */
1426 /* Force the system into the monitor. After this we *should* be at
1427 the mips_monitor_prompt. */
1428 if (mips_monitor
!= MON_IDT
)
1429 j
= 0; /* Start by checking if we are already
1432 j
= 1; /* Start by sending a break. */
1437 case 0: /* First, try sending a CR. */
1438 serial_flush_input (mips_desc
);
1439 serial_write (mips_desc
, "\r", 1);
1441 case 1: /* First, try sending a break. */
1442 serial_send_break (mips_desc
);
1444 case 2: /* Then, try a ^C. */
1445 serial_write (mips_desc
, "\003", 1);
1447 case 3: /* Then, try escaping from download. */
1449 if (mips_monitor
!= MON_IDT
)
1453 /* We shouldn't need to send multiple termination
1454 sequences, since the target performs line (or
1455 block) reads, and then processes those
1456 packets. In-case we were downloading a large packet
1457 we flush the output buffer before inserting a
1458 termination sequence. */
1459 serial_flush_output (mips_desc
);
1460 sprintf (tbuff
, "\r/E/E\r");
1461 serial_write (mips_desc
, tbuff
, 6);
1468 /* We are possibly in binary download mode, having
1469 aborted in the middle of an S-record. ^C won't
1470 work because of binary mode. The only reliable way
1471 out is to send enough termination packets (8 bytes)
1472 to fill up and then overflow the largest size
1473 S-record (255 bytes in this case). This amounts to
1474 256/8 + 1 packets. */
1476 mips_make_srec (srec
, '7', 0, NULL
, 0);
1478 for (i
= 1; i
<= 33; i
++)
1480 serial_write (mips_desc
, srec
, 8);
1482 if (serial_readchar (mips_desc
, 0) >= 0)
1483 break; /* Break immediatly if we get something from
1490 mips_error (_("Failed to initialize."));
1493 if (mips_expect (mips_monitor_prompt
))
1497 if (mips_monitor
!= MON_IDT
)
1499 /* Sometimes PMON ignores the first few characters in the first
1500 command sent after a load. Sending a blank command gets
1502 mips_send_command ("\r", -1);
1504 /* Ensure the correct target state: */
1505 if (mips_monitor
!= MON_LSI
)
1506 mips_send_command ("set regsize 64\r", -1);
1507 mips_send_command ("set hostport tty0\r", -1);
1508 mips_send_command ("set brkcmd \"\"\r", -1);
1509 /* Delete all the current breakpoints: */
1510 mips_send_command ("db *\r", -1);
1511 /* NOTE: PMON does not have breakpoint support through the
1512 "debug" mode, only at the monitor command-line. */
1515 mips_enter_debug ();
1517 /* Clear all breakpoints: */
1518 if ((mips_monitor
== MON_IDT
1519 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1520 || mips_monitor
== MON_LSI
)
1521 monitor_supports_breakpoints
= 1;
1523 monitor_supports_breakpoints
= 0;
1525 do_cleanups (old_cleanups
);
1527 /* If this doesn't call error, we have connected; we don't care if
1528 the request itself succeeds or fails. */
1530 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1533 /* Open a connection to the remote board. */
1536 common_open (struct target_ops
*ops
, const char *name
, int from_tty
,
1537 enum mips_monitor_type new_monitor
,
1538 const char *new_monitor_prompt
)
1540 char *serial_port_name
;
1541 char *remote_name
= 0;
1542 char *local_name
= 0;
1544 struct cleanup
*cleanup
;
1548 To open a MIPS remote debugging connection, you need to specify what\n\
1549 serial device is attached to the target board (e.g., /dev/ttya).\n\
1550 If you want to use TFTP to download to the board, specify the name of a\n\
1551 temporary file to be used by GDB for downloads as the second argument.\n\
1552 This filename must be in the form host:filename, where host is the name\n\
1553 of the host running the TFTP server, and the file must be readable by the\n\
1554 world. If the local name of the temporary file differs from the name as\n\
1555 seen from the board via TFTP, specify that name as the third parameter.\n"));
1557 /* Parse the serial port name, the optional TFTP name, and the
1558 optional local TFTP name. */
1559 argv
= gdb_buildargv (name
);
1560 cleanup
= make_cleanup_freeargv (argv
);
1562 serial_port_name
= xstrdup (argv
[0]);
1563 if (argv
[1]) /* Remote TFTP name specified? */
1565 remote_name
= argv
[1];
1566 if (argv
[2]) /* Local TFTP filename specified? */
1567 local_name
= argv
[2];
1570 target_preopen (from_tty
);
1573 unpush_target (current_ops
);
1575 /* Open and initialize the serial port. */
1576 mips_desc
= serial_open (serial_port_name
);
1577 if (mips_desc
== NULL
)
1578 perror_with_name (serial_port_name
);
1580 if (baud_rate
!= -1)
1582 if (serial_setbaudrate (mips_desc
, baud_rate
))
1584 serial_close (mips_desc
);
1585 perror_with_name (serial_port_name
);
1589 serial_raw (mips_desc
);
1591 /* Open and initialize the optional download port. If it is in the form
1592 hostname#portnumber, it's a UDP socket. If it is in the form
1593 hostname:filename, assume it's the TFTP filename that must be
1594 passed to the DDB board to tell it where to get the load file. */
1597 if (strchr (remote_name
, '#'))
1599 udp_desc
= serial_open (remote_name
);
1601 perror_with_name (_("Unable to open UDP port"));
1606 /* Save the remote and local names of the TFTP temp file. If
1607 the user didn't specify a local name, assume it's the same
1608 as the part of the remote name after the "host:". */
1612 xfree (tftp_localname
);
1613 if (local_name
== NULL
)
1614 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1615 local_name
++; /* Skip over the colon. */
1616 if (local_name
== NULL
)
1617 local_name
= remote_name
; /* Local name same as remote name. */
1618 tftp_name
= xstrdup (remote_name
);
1619 tftp_localname
= xstrdup (local_name
);
1627 /* Reset the expected monitor prompt if it's never been set before. */
1628 if (mips_monitor_prompt
== NULL
)
1629 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1630 mips_monitor
= new_monitor
;
1635 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1637 /* Switch to using remote target now. */
1640 inferior_ptid
= remote_mips_ptid
;
1641 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid
));
1642 add_thread_silent (inferior_ptid
);
1644 /* Try to figure out the processor model if possible. */
1645 deprecated_mips_set_processor_regs_hack ();
1647 /* This is really the job of start_remote however, that makes an
1648 assumption that the target is about to print out a status message
1649 of some sort. That doesn't happen here (in fact, it may not be
1650 possible to get the monitor to send the appropriate packet). */
1652 reinit_frame_cache ();
1653 registers_changed ();
1654 stop_pc
= regcache_read_pc (get_current_regcache ());
1655 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
, 1);
1656 xfree (serial_port_name
);
1658 do_cleanups (cleanup
);
1661 /* Open a connection to an IDT board. */
1664 mips_open (const char *name
, int from_tty
)
1666 const char *monitor_prompt
= NULL
;
1667 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1668 && gdbarch_bfd_arch_info (target_gdbarch ())->arch
== bfd_arch_mips
)
1670 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach
)
1672 case bfd_mach_mips4100
:
1673 case bfd_mach_mips4300
:
1674 case bfd_mach_mips4600
:
1675 case bfd_mach_mips4650
:
1676 case bfd_mach_mips5000
:
1677 monitor_prompt
= "<RISQ> ";
1681 if (monitor_prompt
== NULL
)
1682 monitor_prompt
= "<IDT>";
1683 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1686 /* Open a connection to a PMON board. */
1689 pmon_open (const char *name
, int from_tty
)
1691 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1694 /* Open a connection to a DDB board. */
1697 ddb_open (const char *name
, int from_tty
)
1699 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1702 /* Open a connection to a rockhopper board. */
1705 rockhopper_open (const char *name
, int from_tty
)
1707 common_open (&rockhopper_ops
, name
, from_tty
, MON_ROCKHOPPER
, "NEC01>");
1710 /* Open a connection to an LSI board. */
1713 lsi_open (const char *name
, int from_tty
)
1717 /* Clear the LSI breakpoint table. */
1718 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1719 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1721 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1724 /* Close a connection to the remote board. */
1727 mips_close (struct target_ops
*self
)
1731 /* Get the board out of remote debugging mode. */
1732 (void) mips_exit_debug ();
1737 generic_mourn_inferior ();
1740 /* Detach from the remote board. */
1743 mips_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
1746 error (_("Argument given to \"detach\" when remotely debugging."));
1748 unpush_target (ops
);
1751 printf_unfiltered ("Ending remote MIPS debugging.\n");
1754 /* Tell the target board to resume. This does not wait for a reply
1755 from the board, except in the case of single-stepping on LSI boards,
1756 where PMON does return a reply. */
1759 mips_resume (struct target_ops
*ops
,
1760 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
1764 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1765 a single step, so we wait for that. */
1766 mips_request (step
? 's' : 'c', 1, siggnal
,
1767 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1768 mips_receive_wait
, NULL
);
1771 /* Return the signal corresponding to SIG, where SIG is the number which
1772 the MIPS protocol uses for the signal. */
1774 static enum gdb_signal
1775 mips_signal_from_protocol (int sig
)
1777 /* We allow a few more signals than the IDT board actually returns, on
1778 the theory that there is at least *some* hope that perhaps the numbering
1779 for these signals is widely agreed upon. */
1782 return GDB_SIGNAL_UNKNOWN
;
1784 /* Don't want to use gdb_signal_from_host because we are converting
1785 from MIPS signal numbers, not host ones. Our internal numbers
1786 match the MIPS numbers for the signals the board can return, which
1787 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1788 return (enum gdb_signal
) sig
;
1791 /* Set the register designated by REGNO to the value designated by VALUE. */
1794 mips_set_register (int regno
, ULONGEST value
)
1796 gdb_byte buf
[MAX_REGISTER_SIZE
];
1797 struct regcache
*regcache
= get_current_regcache ();
1798 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1799 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1801 /* We got the number the register holds, but gdb expects to see a
1802 value in the target byte ordering. */
1804 if (mips_monitor
!= MON_ROCKHOPPER
1805 && (regno
== mips_regnum (gdbarch
)->pc
|| regno
< 32))
1806 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1807 In such cases we can only really debug 32-bit code properly so,
1808 when reading a GPR or the PC, assume that the full 64-bit
1809 value is the sign extension of the lower 32 bits. */
1810 store_signed_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1813 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1816 regcache_raw_supply (regcache
, regno
, buf
);
1819 /* Wait until the remote stops, and return a wait status. */
1822 mips_wait (struct target_ops
*ops
,
1823 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1827 char buff
[DATA_MAXLEN
];
1828 ULONGEST rpc
, rfp
, rsp
;
1829 char pc_string
[17], fp_string
[17], sp_string
[17], flags
[20];
1832 interrupt_count
= 0;
1835 /* If we have not sent a single step or continue command, then the
1836 board is waiting for us to do something. Return a status
1837 indicating that it is stopped. */
1838 if (!mips_need_reply
)
1840 status
->kind
= TARGET_WAITKIND_STOPPED
;
1841 status
->value
.sig
= GDB_SIGNAL_TRAP
;
1842 return inferior_ptid
;
1845 /* No timeout; we sit here as long as the program continues to execute. */
1847 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1850 mips_error (_("Remote failure: %s"), safe_strerror (errno
));
1852 /* On returning from a continue, the PMON monitor seems to start
1853 echoing back the messages we send prior to sending back the
1854 ACK. The code can cope with this, but to try and avoid the
1855 unnecessary serial traffic, and "spurious" characters displayed
1856 to the user, we cheat and reset the debug protocol. The problems
1857 seems to be caused by a check on the number of arguments, and the
1858 command length, within the monitor causing it to echo the command
1860 if (mips_monitor
== MON_PMON
)
1863 mips_enter_debug ();
1866 /* See if we got back extended status. If so, pick out the pc, fp,
1869 nfields
= sscanf (buff
,
1870 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1871 pc_string
, fp_string
, sp_string
, flags
);
1873 && read_hex_value (pc_string
, &rpc
)
1874 && read_hex_value (fp_string
, &rfp
)
1875 && read_hex_value (sp_string
, &rsp
))
1877 struct regcache
*regcache
= get_current_regcache ();
1878 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1880 mips_set_register (gdbarch_pc_regnum (gdbarch
), rpc
);
1881 mips_set_register (30, rfp
);
1882 mips_set_register (gdbarch_sp_regnum (gdbarch
), rsp
);
1888 for (i
= 0; i
<= 2; i
++)
1889 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1891 else if (flags
[i
] == '\000')
1896 if (strcmp (target_shortname
, "lsi") == 0)
1899 /* If this is an LSI PMON target, see if we just hit a
1900 hardrdware watchpoint. Right now, PMON doesn't give us
1901 enough information to determine which breakpoint we hit. So
1902 we have to look up the PC in our own table of breakpoints,
1903 and if found, assume it's just a normal instruction fetch
1904 breakpoint, not a data watchpoint. FIXME when PMON provides
1905 some way to tell us what type of breakpoint it is. */
1907 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1910 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1912 if (lsi_breakpoints
[i
].addr
== pc
1913 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1920 /* If a data breakpoint was hit, PMON returns the following packet:
1922 The return packet from an ordinary breakpoint doesn't have the
1923 extra 0x01 field tacked onto the end. */
1924 if (nfields
== 1 && rpc
== 1)
1929 /* NOTE: The following (sig) numbers are defined by PMON:
1930 SPP_SIGTRAP 5 breakpoint
1938 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1939 and so on, because the constants we want here are determined by the
1940 MIPS protocol and have nothing to do with what host we are running on. */
1941 if ((rstatus
& 0xff) == 0)
1943 status
->kind
= TARGET_WAITKIND_EXITED
;
1944 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1946 else if ((rstatus
& 0xff) == 0x7f)
1948 status
->kind
= TARGET_WAITKIND_STOPPED
;
1949 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1951 /* If the stop PC is in the _exit function, assume
1952 we hit the 'break 0x3ff' instruction in _exit, so this
1953 is not a normal breakpoint. */
1954 if (strcmp (target_shortname
, "lsi") == 0)
1956 const char *func_name
;
1957 CORE_ADDR func_start
;
1958 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1960 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1961 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1962 && func_start
== pc
)
1963 status
->kind
= TARGET_WAITKIND_EXITED
;
1968 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1969 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1972 return inferior_ptid
;
1975 /* We have to map between the register numbers used by gdb and the
1976 register numbers used by the debugging protocol. */
1978 #define REGNO_OFFSET 96
1981 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1985 if (regno
>= mips_regnum (gdbarch
)->fp0
1986 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1987 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1988 else if (regno
== mips_regnum (gdbarch
)->pc
)
1989 return REGNO_OFFSET
+ 0;
1990 else if (regno
== mips_regnum (gdbarch
)->cause
)
1991 return REGNO_OFFSET
+ 1;
1992 else if (regno
== mips_regnum (gdbarch
)->hi
)
1993 return REGNO_OFFSET
+ 2;
1994 else if (regno
== mips_regnum (gdbarch
)->lo
)
1995 return REGNO_OFFSET
+ 3;
1996 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
1997 return REGNO_OFFSET
+ 4;
1998 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
1999 return REGNO_OFFSET
+ 5;
2001 /* FIXME: Is there a way to get the status register? */
2005 /* Fetch the remote registers. */
2008 mips_fetch_registers (struct target_ops
*ops
,
2009 struct regcache
*regcache
, int regno
)
2011 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2012 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2018 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2019 mips_fetch_registers (ops
, regcache
, regno
);
2023 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
2024 || regno
== MIPS_ZERO_REGNUM
)
2025 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2026 supposed to read zero (see also mips-nat.c). */
2030 /* If PMON doesn't support this register, don't waste serial
2031 bandwidth trying to read it. */
2032 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
2034 if (regno
!= 0 && pmon_reg
== 0)
2038 /* Unfortunately the PMON version in the Vr4300 board has been
2039 compiled without the 64bit register access commands. This
2040 means we cannot get hold of the full register width. */
2041 if (mips_monitor
== MON_DDB
|| mips_monitor
== MON_ROCKHOPPER
)
2042 val
= mips_request ('t', pmon_reg
, 0,
2043 &err
, mips_receive_wait
, NULL
);
2045 val
= mips_request ('r', pmon_reg
, 0,
2046 &err
, mips_receive_wait
, NULL
);
2048 mips_error (_("Can't read register %d: %s"), regno
,
2049 safe_strerror (errno
));
2053 mips_set_register (regno
, val
);
2056 /* Prepare to store registers. The MIPS protocol can store individual
2057 registers, so this function doesn't have to do anything. */
2060 mips_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
2064 /* Store remote register(s). */
2067 mips_store_registers (struct target_ops
*ops
,
2068 struct regcache
*regcache
, int regno
)
2070 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2076 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2077 mips_store_registers (ops
, regcache
, regno
);
2081 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
2082 mips_request (mips_monitor
== MON_ROCKHOPPER
? 'T' : 'R',
2083 mips_map_regno (gdbarch
, regno
),
2085 &err
, mips_receive_wait
, NULL
);
2087 mips_error (_("Can't write register %d: %s"), regno
,
2088 safe_strerror (errno
));
2091 /* Fetch a word from the target board. Return word fetched in location
2092 addressed by VALP. Return 0 when successful; return positive error
2096 mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
)
2100 *valp
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2103 /* Data space failed; try instruction space. */
2104 *valp
= mips_request ('i', addr
, 0, &err
,
2105 mips_receive_wait
, NULL
);
2110 /* Store a word to the target board. Returns errno code or zero for
2111 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2112 memory location there. */
2114 /* FIXME! make sure only 32-bit quantities get stored! */
2116 mips_store_word (CORE_ADDR addr
, unsigned int val
, int *old_contents
)
2119 unsigned int oldcontents
;
2121 oldcontents
= mips_request ('D', addr
, val
, &err
,
2122 mips_receive_wait
, NULL
);
2125 /* Data space failed; try instruction space. */
2126 oldcontents
= mips_request ('I', addr
, val
, &err
,
2127 mips_receive_wait
, NULL
);
2131 if (old_contents
!= NULL
)
2132 *old_contents
= oldcontents
;
2136 /* Helper for mips_xfer_partial that handles memory transfers.
2137 Arguments are like target_xfer_partial. Note that the protocol
2138 gives us the correct value for a longword, since it transfers
2139 values in ASCII. We want the byte values, so we have to swap the
2142 static int mask_address_p
= 1;
2144 static enum target_xfer_status
2145 mips_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2146 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
2148 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch ());
2155 /* PMON targets do not cope well with 64 bit addresses. Mask the
2156 value down to 32 bits. */
2158 memaddr
&= (CORE_ADDR
) 0xffffffff;
2160 /* Round starting address down to longword boundary. */
2161 addr
= memaddr
& ~3;
2162 /* Round ending address up; get number of longwords that makes. */
2163 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2164 /* Allocate buffer of that many longwords. */
2165 buffer
= alloca (count
* 4);
2167 if (writebuf
!= NULL
)
2169 /* Fill start and end extra bytes of buffer with existing data. */
2170 if (addr
!= memaddr
|| len
< 4)
2174 if (mips_fetch_word (addr
, &val
))
2175 return TARGET_XFER_E_IO
;
2177 /* Need part of initial word -- fetch it. */
2178 store_unsigned_integer (&buffer
[0], 4, byte_order
, val
);
2185 /* Need part of last word -- fetch it. FIXME: we do this even
2186 if we don't need it. */
2187 if (mips_fetch_word (addr
+ (count
- 1) * 4, &val
))
2188 return TARGET_XFER_E_IO
;
2190 store_unsigned_integer (&buffer
[(count
- 1) * 4],
2191 4, byte_order
, val
);
2194 /* Copy data to be written over corresponding part of buffer. */
2196 memcpy ((char *) buffer
+ (memaddr
& 3), writebuf
, len
);
2198 /* Write the entire buffer. */
2200 for (i
= 0; i
< count
; i
++, addr
+= 4)
2204 word
= extract_unsigned_integer (&buffer
[i
* 4], 4, byte_order
);
2205 status
= mips_store_word (addr
, word
, NULL
);
2206 /* Report each kilobyte (we download 32-bit words at a time). */
2209 printf_unfiltered ("*");
2210 gdb_flush (gdb_stdout
);
2213 return TARGET_XFER_E_IO
;
2214 /* FIXME: Do we want a QUIT here? */
2217 printf_unfiltered ("\n");
2221 /* Read all the longwords. */
2222 for (i
= 0; i
< count
; i
++, addr
+= 4)
2226 if (mips_fetch_word (addr
, &val
))
2227 return TARGET_XFER_E_IO
;
2229 store_unsigned_integer (&buffer
[i
* 4], 4, byte_order
, val
);
2233 /* Copy appropriate bytes out of the buffer. */
2234 memcpy (readbuf
, buffer
+ (memaddr
& 3), len
);
2239 /* Target to_xfer_partial implementation. */
2241 static enum target_xfer_status
2242 mips_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2243 const char *annex
, gdb_byte
*readbuf
,
2244 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
2245 ULONGEST
*xfered_len
)
2249 case TARGET_OBJECT_MEMORY
:
2250 return mips_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
2253 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
2254 readbuf
, writebuf
, offset
, len
,
2259 /* Print info on this target. */
2262 mips_files_info (struct target_ops
*ignore
)
2264 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2267 /* Kill the process running on the board. This will actually only
2268 work if we are doing remote debugging over the console input. I
2269 think that if IDT/sim had the remote debug interrupt enabled on the
2270 right port, we could interrupt the process with a break signal. */
2273 mips_kill (struct target_ops
*ops
)
2275 if (!mips_wait_flag
)
2277 target_mourn_inferior ();
2283 if (interrupt_count
>= 2)
2285 interrupt_count
= 0;
2287 target_terminal_ours ();
2289 if (query (_("Interrupted while waiting for the program.\n\
2290 Give up (and stop debugging it)? ")))
2292 /* Clean up in such a way that mips_close won't try to talk
2293 to the board (it almost surely won't work since we
2294 weren't able to talk to it). */
2298 printf_unfiltered ("Ending remote MIPS debugging.\n");
2299 target_mourn_inferior ();
2303 target_terminal_inferior ();
2306 if (remote_debug
> 0)
2307 printf_unfiltered ("Sending break\n");
2309 serial_send_break (mips_desc
);
2311 target_mourn_inferior ();
2320 serial_write (mips_desc
, &cc
, 1);
2322 target_mourn_inferior ();
2327 /* Start running on the target board. */
2330 mips_create_inferior (struct target_ops
*ops
, char *execfile
,
2331 char *args
, char **env
, int from_tty
)
2338 Can't pass arguments to remote MIPS board; arguments ignored."));
2339 /* And don't try to use them on the next "run" command. */
2340 execute_command ("set args", 0);
2343 if (execfile
== 0 || exec_bfd
== 0)
2344 error (_("No executable file specified"));
2346 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2348 init_wait_for_inferior ();
2350 regcache_write_pc (get_current_regcache (), entry_pt
);
2353 /* Clean up after a process. The bulk of the work is done in mips_close(),
2354 which is called when unpushing the target. */
2357 mips_mourn_inferior (struct target_ops
*ops
)
2359 if (current_ops
!= NULL
)
2360 unpush_target (current_ops
);
2363 /* We can write a breakpoint and read the shadow contents in one
2366 /* Insert a breakpoint. On targets that don't have built-in
2367 breakpoint support, we read the contents of the target location and
2368 stash it, then overwrite it with a breakpoint instruction. ADDR is
2369 the target location in the target machine. BPT is the breakpoint
2370 being inserted or removed, which contains memory for saving the
2374 mips_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2375 struct bp_target_info
*bp_tgt
)
2377 if (monitor_supports_breakpoints
)
2378 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2381 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
2384 /* Remove a breakpoint. */
2387 mips_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2388 struct bp_target_info
*bp_tgt
)
2390 if (monitor_supports_breakpoints
)
2391 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2394 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
);
2397 /* Tell whether this target can support a hardware breakpoint. CNT
2398 is the number of hardware breakpoints already installed. This
2399 implements the target_can_use_hardware_watchpoint macro. */
2402 mips_can_use_watchpoint (struct target_ops
*self
,
2403 int type
, int cnt
, int othertype
)
2405 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2409 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2410 This is used for memory ref breakpoints. */
2412 static unsigned long
2413 calculate_mask (CORE_ADDR addr
, int len
)
2418 mask
= addr
^ (addr
+ len
- 1);
2420 for (i
= 32; i
>= 0; i
--)
2426 mask
= (unsigned long) 0xffffffff >> i
;
2432 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2433 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2437 mips_insert_watchpoint (struct target_ops
*self
,
2438 CORE_ADDR addr
, int len
, int type
,
2439 struct expression
*cond
)
2441 if (mips_set_breakpoint (addr
, len
, type
))
2447 /* Remove a watchpoint. */
2450 mips_remove_watchpoint (struct target_ops
*self
,
2451 CORE_ADDR addr
, int len
, int type
,
2452 struct expression
*cond
)
2454 if (mips_clear_breakpoint (addr
, len
, type
))
2460 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2464 mips_stopped_by_watchpoint (struct target_ops
*ops
)
2466 return hit_watchpoint
;
2470 /* Insert a breakpoint. */
2473 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2475 return mips_common_breakpoint (1, addr
, len
, type
);
2479 /* Clear a breakpoint. */
2482 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2484 return mips_common_breakpoint (0, addr
, len
, type
);
2488 /* Check the error code from the return packet for an LSI breakpoint
2489 command. If there's no error, just return 0. If it's a warning,
2490 print the warning text and return 0. If it's an error, print
2491 the error text and return 1. <ADDR> is the address of the breakpoint
2492 that was being set. <RERRFLG> is the error code returned by PMON.
2493 This is a helper function for mips_common_breakpoint. */
2496 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2498 struct lsi_error
*err
;
2499 const char *saddr
= paddress (target_gdbarch (), addr
);
2501 if (rerrflg
== 0) /* no error */
2504 /* Warnings can be ORed together, so check them all. */
2505 if (rerrflg
& W_WARN
)
2507 if (monitor_warnings
)
2511 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2513 if ((err
->code
& rerrflg
) == err
->code
)
2516 fprintf_unfiltered (gdb_stderr
, "\
2517 mips_common_breakpoint (%s): Warning: %s\n",
2523 fprintf_unfiltered (gdb_stderr
, "\
2524 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2531 /* Errors are unique, i.e. can't be ORed together. */
2532 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2534 if ((err
->code
& rerrflg
) == err
->code
)
2536 fprintf_unfiltered (gdb_stderr
, "\
2537 mips_common_breakpoint (%s): Error: %s\n",
2543 fprintf_unfiltered (gdb_stderr
, "\
2544 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2551 /* This routine sends a breakpoint command to the remote target.
2553 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2554 <ADDR> is the address of the breakpoint.
2555 <LEN> the length of the region to break on.
2556 <TYPE> is the type of breakpoint:
2557 0 = write (BREAK_WRITE)
2558 1 = read (BREAK_READ)
2559 2 = read/write (BREAK_ACCESS)
2560 3 = instruction fetch (BREAK_FETCH)
2562 Return 0 if successful; otherwise 1. */
2565 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2567 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
2568 char buf
[DATA_MAXLEN
+ 1];
2570 int rpid
, rerrflg
, rresponse
, rlen
;
2573 addr
= gdbarch_addr_bits_remove (target_gdbarch (), addr
);
2575 if (mips_monitor
== MON_LSI
)
2577 if (set
== 0) /* clear breakpoint */
2579 /* The LSI PMON "clear breakpoint" has this form:
2580 <pid> 'b' <bptn> 0x0
2582 <pid> 'b' 0x0 <code>
2584 <bptn> is a breakpoint number returned by an earlier 'B' command.
2585 Possible return codes: OK, E_BPT. */
2589 /* Search for the breakpoint in the table. */
2590 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2591 if (lsi_breakpoints
[i
].type
== type
2592 && lsi_breakpoints
[i
].addr
== addr
2593 && lsi_breakpoints
[i
].len
== len
)
2596 /* Clear the table entry and tell PMON to clear the breakpoint. */
2597 if (i
== MAX_LSI_BREAKPOINTS
)
2600 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2601 paddress (target_gdbarch (), addr
));
2605 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2606 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2607 mips_send_packet (buf
, 1);
2609 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2612 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2614 mips_error (_("mips_common_breakpoint: "
2615 "Bad response from remote board: %s"),
2618 return (mips_check_lsi_error (addr
, rerrflg
));
2621 /* set a breakpoint */
2623 /* The LSI PMON "set breakpoint" command has this form:
2624 <pid> 'B' <addr> 0x0
2626 <pid> 'B' <bptn> <code>
2628 The "set data breakpoint" command has this form:
2630 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2632 where: type= "0x1" = read
2634 "0x3" = access (read or write)
2636 The reply returns two values:
2637 bptn - a breakpoint number, which is a small integer with
2638 possible values of zero through 255.
2639 code - an error return code, a value of zero indicates a
2640 succesful completion, other values indicate various
2641 errors and warnings.
2643 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2645 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2648 sprintf (buf
, "0x0 B 0x%s 0x0", phex_nz (addr
, addr_size
));
2654 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s",
2655 phex_nz (addr
, addr_size
),
2656 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2657 phex_nz (addr
+ len
- 1, addr_size
));
2659 mips_send_packet (buf
, 1);
2661 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2664 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2665 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2666 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2667 mips_error (_("mips_common_breakpoint: "
2668 "Bad response from remote board: %s"),
2672 if (mips_check_lsi_error (addr
, rerrflg
))
2675 /* rresponse contains PMON's breakpoint number. Record the
2676 information for this breakpoint so we can clear it later. */
2677 lsi_breakpoints
[rresponse
].type
= type
;
2678 lsi_breakpoints
[rresponse
].addr
= addr
;
2679 lsi_breakpoints
[rresponse
].len
= len
;
2686 /* On non-LSI targets, the breakpoint command has this form:
2687 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2688 <MASK> is a don't care mask for addresses.
2689 <FLAGS> is any combination of `r', `w', or `f' for
2690 read/write/fetch. */
2694 mask
= calculate_mask (addr
, len
);
2697 if (set
) /* set a breakpoint */
2703 case BREAK_WRITE
: /* write */
2706 case BREAK_READ
: /* read */
2709 case BREAK_ACCESS
: /* read/write */
2712 case BREAK_FETCH
: /* fetch */
2716 internal_error (__FILE__
, __LINE__
,
2717 _("failed internal consistency check"));
2721 sprintf (buf
, "0x0 B 0x%s 0x%s %s", phex_nz (addr
, addr_size
),
2722 phex_nz (mask
, addr_size
), flags
);
2727 sprintf (buf
, "0x0 b 0x%s", phex_nz (addr
, addr_size
));
2730 mips_send_packet (buf
, 1);
2732 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2735 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2736 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2738 if (nfields
!= 4 || rcmd
!= cmd
)
2739 mips_error (_("mips_common_breakpoint: "
2740 "Bad response from remote board: %s"),
2745 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2746 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2747 if (mips_monitor
== MON_DDB
)
2748 rresponse
= rerrflg
;
2749 if (rresponse
!= 22) /* invalid argument */
2750 fprintf_unfiltered (gdb_stderr
, "\
2751 mips_common_breakpoint (%s): Got error: 0x%x\n",
2752 paddress (target_gdbarch (), addr
), rresponse
);
2759 /* Send one S record as specified by SREC of length LEN, starting
2760 at ADDR. Note, however, that ADDR is not used except to provide
2761 a useful message to the user in the event that a NACK is received
2765 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2771 serial_write (mips_desc
, srec
, len
);
2773 ch
= mips_readchar (remote_timeout
);
2777 case SERIAL_TIMEOUT
:
2778 error (_("Timeout during download."));
2782 case 0x15: /* NACK */
2783 fprintf_unfiltered (gdb_stderr
,
2784 "Download got a NACK at byte %s! Retrying.\n",
2785 paddress (target_gdbarch (), addr
));
2788 error (_("Download got unexpected ack char: 0x%x, retrying."),
2794 /* Download a binary file by converting it to S records. */
2797 mips_load_srec (const char *args
)
2804 unsigned int srec_frame
= 200;
2806 struct cleanup
*cleanup
;
2807 static int hashmark
= 1;
2809 buffer
= alloca (srec_frame
* 2 + 256);
2811 abfd
= gdb_bfd_open (args
, NULL
, -1);
2814 printf_filtered ("Unable to open file %s\n", args
);
2818 cleanup
= make_cleanup_bfd_unref (abfd
);
2819 if (bfd_check_format (abfd
, bfd_object
) == 0)
2821 printf_filtered ("File is not an object file\n");
2822 do_cleanups (cleanup
);
2826 /* This actually causes a download in the IDT binary format: */
2827 mips_send_command (LOAD_CMD
, 0);
2829 for (s
= abfd
->sections
; s
; s
= s
->next
)
2831 if (s
->flags
& SEC_LOAD
)
2833 unsigned int numbytes
;
2835 /* FIXME! vma too small????? */
2836 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2838 (long) (s
->vma
+ bfd_get_section_size (s
)));
2839 gdb_flush (gdb_stdout
);
2841 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2843 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2845 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2847 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2849 send_srec (srec
, reclen
, s
->vma
+ i
);
2851 if (deprecated_ui_load_progress_hook
)
2852 deprecated_ui_load_progress_hook (s
->name
, i
);
2856 putchar_unfiltered ('#');
2857 gdb_flush (gdb_stdout
);
2860 } /* Per-packet (or S-record) loop */
2862 putchar_unfiltered ('\n');
2863 } /* Loadable sections */
2866 putchar_unfiltered ('\n');
2868 /* Write a type 7 terminator record. no data for a type 7, and there
2869 is no data, so len is 0. */
2871 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2873 send_srec (srec
, reclen
, abfd
->start_address
);
2875 serial_flush_input (mips_desc
);
2876 do_cleanups (cleanup
);
2880 * mips_make_srec -- make an srecord. This writes each line, one at a
2881 * time, each with it's own header and trailer line.
2882 * An srecord looks like this:
2884 * byte count-+ address
2885 * start ---+ | | data +- checksum
2887 * S01000006F6B692D746573742E73726563E4
2888 * S315000448600000000000000000FC00005900000000E9
2889 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2890 * S30B0004485A0000000000004E
2893 * S<type><length><address><data><checksum>
2897 * is the number of bytes following upto the checksum. Note that
2898 * this is not the number of chars following, since it takes two
2899 * chars to represent a byte.
2903 * 1) two byte address data record
2904 * 2) three byte address data record
2905 * 3) four byte address data record
2906 * 7) four byte address termination record
2907 * 8) three byte address termination record
2908 * 9) two byte address termination record
2911 * is the start address of the data following, or in the case of
2912 * a termination record, the start address of the image
2916 * is the sum of all the raw byte data in the record, from the length
2917 * upwards, modulo 256 and subtracted from 255.
2919 * This routine returns the length of the S-record.
2924 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2927 unsigned char checksum
;
2930 /* Create the header for the srec. addr_size is the number of bytes
2931 in the address, and 1 is the number of bytes in the count. */
2933 /* FIXME!! bigger buf required for 64-bit! */
2936 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2937 /* This assumes S3 style downloads (4byte addresses). There should
2938 probably be a check, or the code changed to make it more
2940 buf
[3] = memaddr
>> 24;
2941 buf
[4] = memaddr
>> 16;
2942 buf
[5] = memaddr
>> 8;
2944 memcpy (&buf
[7], myaddr
, len
);
2946 /* Note that the checksum is calculated on the raw data, not the
2947 hexified data. It includes the length, address and the data
2948 portions of the packet. */
2950 buf
+= 2; /* Point at length byte. */
2951 for (i
= 0; i
< len
+ 4 + 1; i
++)
2959 /* The following manifest controls whether we enable the simple flow
2960 control support provided by the monitor. If enabled the code will
2961 wait for an affirmative ACK between transmitting packets. */
2962 #define DOETXACK (1)
2964 /* The PMON fast-download uses an encoded packet format constructed of
2965 3byte data packets (encoded as 4 printable ASCII characters), and
2966 escape sequences (preceded by a '/'):
2969 'C' compare checksum (12bit value, not included in checksum calculation)
2970 'S' define symbol name (for addr) terminated with ","
2971 and padded to 4char boundary
2972 'Z' zero fill multiple of 3bytes
2973 'B' byte (12bit encoded value, of 8bit data)
2974 'A' address (36bit encoded value)
2975 'E' define entry as original address, and exit load
2977 The packets are processed in 4 character chunks, so the escape
2978 sequences that do not have any data (or variable length data)
2979 should be padded to a 4 character boundary. The decoder will give
2980 an error if the complete message block size is not a multiple of
2981 4bytes (size of record).
2983 The encoding of numbers is done in 6bit fields. The 6bit value is
2984 used to index into this string to get the specific character
2985 encoding for the value: */
2986 static char encoding
[] =
2987 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2989 /* Convert the number of bits required into an encoded number, 6bits
2990 at a time (range 0..63). Keep a checksum if required (passed
2991 pointer non-NULL). The function returns the number of encoded
2992 characters written into the buffer. */
2995 pmon_makeb64 (unsigned long v
, char *p
, int n
, unsigned int *chksum
)
2997 int count
= (n
/ 6);
3001 fprintf_unfiltered (gdb_stderr
,
3002 "Fast encoding bitcount must be a "
3003 "multiple of 12bits: %dbit%s\n",
3004 n
, (n
== 1) ? "" : "s");
3009 fprintf_unfiltered (gdb_stderr
,
3010 "Fast encoding cannot process more "
3011 "than 36bits at the moment: %dbits\n", n
);
3015 /* Deal with the checksum: */
3021 *chksum
+= ((v
>> 24) & 0xFFF);
3023 *chksum
+= ((v
>> 12) & 0xFFF);
3025 *chksum
+= ((v
>> 0) & 0xFFF);
3032 *p
++ = encoding
[(v
>> n
) & 0x3F];
3039 /* Shorthand function (that could be in-lined) to output the zero-fill
3040 escape sequence into the data stream. */
3043 pmon_zeroset (int recsize
, char **buff
,
3044 unsigned int *amount
, unsigned int *chksum
)
3048 sprintf (*buff
, "/Z");
3049 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3050 *buff
+= (count
+ 2);
3052 return (recsize
+ count
+ 2);
3055 /* Add the checksum specified by *VALUE to end of the record under
3056 construction. *BUF specifies the location at which to begin
3057 writing characters comprising the checksum information. RECSIZE
3058 specifies the size of the record constructed thus far. (A trailing
3059 NUL character may be present in the buffer holding the record, but
3060 the record size does not include this character.)
3062 Return the total size of the record after adding the checksum escape,
3063 the checksum itself, and the trailing newline.
3065 The checksum specified by *VALUE is zeroed out prior to returning.
3066 Additionally, *BUF is updated to refer to the location just beyond
3067 the record elements added by this call. */
3070 pmon_checkset (int recsize
, char **buff
, unsigned int *value
)
3074 /* Add the checksum (without updating the value): */
3075 sprintf (*buff
, "/C");
3076 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3077 *buff
+= (count
+ 2);
3078 sprintf (*buff
, "\n");
3079 *buff
+= 2; /* Include zero terminator. */
3080 /* Forcing a checksum validation clears the sum: */
3082 return (recsize
+ count
+ 3);
3085 /* Amount of padding we leave after at the end of the output buffer,
3086 for the checksum and line termination characters: */
3087 #define CHECKSIZE (4 + 4 + 4 + 2)
3088 /* zero-fill, checksum, transfer end and line termination space. */
3090 /* The amount of binary data loaded from the object file in a single
3092 #define BINCHUNK (1024)
3094 /* Maximum line of data accepted by the monitor: */
3095 #define MAXRECSIZE (550)
3096 /* NOTE: This constant depends on the monitor being used. This value
3097 is for PMON 5.x on the Cogent Vr4300 board. */
3099 /* Create a FastLoad format record.
3101 *OUTBUF is the buffer into which a FastLoad formatted record is
3102 written. On return, the pointer position represented by *OUTBUF
3103 is updated to point at the end of the data, i.e. the next position
3104 in the buffer that may be written. No attempt is made to NUL-
3105 terminate this portion of the record written to the buffer.
3107 INBUF contains the binary input data from which the FastLoad
3108 formatted record will be built. *INPTR is an index into this
3109 buffer. *INPTR is updated as the input is consumed. Thus, on
3110 return, the caller has access to the position of the next input
3111 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3114 *RECSIZE will be written with the size of the record written to the
3115 output buffer prior to returning. This size does not include a
3116 NUL-termination byte as none is written to the output buffer.
3118 *CSUM is the output buffer checksum. It is updated as data is
3119 written to the output buffer.
3121 *ZEROFILL is the current number of 3-byte zero sequences that have
3122 been encountered. It is both an input and an output to this
3126 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3127 int inamount
, int *recsize
, unsigned int *csum
,
3128 unsigned int *zerofill
)
3133 /* This is a simple check to ensure that our data will fit within
3134 the maximum allowable record size. Each record output is 4bytes
3135 in length. We must allow space for a pending zero fill command,
3136 the record, and a checksum record. */
3137 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3139 /* Process the binary data: */
3140 if ((inamount
- *inptr
) < 3)
3143 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3145 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3147 *recsize
+= (2 + count
);
3152 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16)
3153 | (inbuf
[*inptr
+ 1] << 8)
3154 | (inbuf
[*inptr
+ 2]));
3156 /* Simple check for zero data. TODO: A better check would be
3157 to check the last, and then the middle byte for being zero
3158 (if the first byte is not). We could then check for
3159 following runs of zeros, and if above a certain size it is
3160 worth the 4 or 8 character hit of the byte insertions used
3161 to pad to the start of the zeroes. NOTE: This also depends
3162 on the alignment at the end of the zero run. */
3163 if (value
== 0x00000000)
3166 if (*zerofill
== 0xFFF) /* 12bit counter */
3167 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3172 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3173 count
= pmon_makeb64 (value
, p
, 24, csum
);
3185 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3186 output the message specified by MESG. Return -1 for failure, 0
3190 pmon_check_ack (char *mesg
)
3192 #if defined(DOETXACK)
3197 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
3199 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3201 fprintf_unfiltered (gdb_stderr
,
3202 "Failed to receive valid ACK for %s\n", mesg
);
3203 return (-1); /* Terminate the download. */
3206 #endif /* DOETXACK */
3210 /* pmon_download - Send a sequence of characters to the PMON download port,
3211 which is either a serial port or a UDP socket. */
3214 pmon_start_download (void)
3218 /* Create the temporary download file. */
3219 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3220 perror_with_name (tftp_localname
);
3224 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3225 mips_expect ("Downloading from ");
3226 mips_expect (udp_in_use
? "udp" : "tty0");
3227 mips_expect (", ^C to abort\r\n");
3231 /* Look for the string specified by STRING sent from the target board
3232 during a download operation. If the string in question is not
3233 seen, output an error message, remove the temporary file, if
3234 appropriate, and return 0. Otherwise, return 1 to indicate
3238 mips_expect_download (char *string
)
3240 if (!mips_expect (string
))
3242 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3244 remove (tftp_localname
); /* Remove temporary file. */
3251 /* Look for messages from the target board associated with the entry
3254 NOTE: This function doesn't indicate success or failure, so we
3255 have no way to determine whether or not the output from the board
3256 was correctly seen. However, given that other items are checked
3257 after this, it seems unlikely that those checks will pass if this
3258 check doesn't first (silently) pass. */
3261 pmon_check_entry_address (char *entry_address
, int final
)
3263 char hexnumber
[9]; /* Includes '\0' space. */
3265 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3266 sprintf (hexnumber
, "%x", final
);
3267 mips_expect (hexnumber
);
3268 mips_expect ("\r\n");
3271 /* Look for messages from the target board showing the total number of
3272 bytes downloaded to the board. Output 1 for success if the tail
3273 end of the message was read correctly, 0 otherwise. */
3276 pmon_check_total (int bintotal
)
3278 char hexnumber
[9]; /* Includes '\0' space. */
3280 mips_expect ("\r\ntotal = 0x");
3281 sprintf (hexnumber
, "%x", bintotal
);
3282 mips_expect (hexnumber
);
3283 return mips_expect_download (" bytes\r\n");
3286 /* Look for the termination messages associated with the end of
3287 a download to the board.
3289 Also, when `tftp_in_use' is set, issue the load command to the
3290 board causing the file to be transferred. (This is done prior
3291 to looking for the above mentioned termination messages.) */
3294 pmon_end_download (int final
, int bintotal
)
3296 char hexnumber
[9]; /* Includes '\0' space. */
3300 static char *load_cmd_prefix
= "load -b -s ";
3304 /* Close off the temporary file containing the load data. */
3308 /* Make the temporary file readable by the world. */
3309 if (stat (tftp_localname
, &stbuf
) == 0)
3310 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3312 /* Must reinitialize the board to prevent PMON from crashing. */
3313 if (mips_monitor
!= MON_ROCKHOPPER
)
3314 mips_send_command ("initEther\r", -1);
3316 /* Send the load command. */
3317 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3318 strcpy (cmd
, load_cmd_prefix
);
3319 strcat (cmd
, tftp_name
);
3321 mips_send_command (cmd
, 0);
3323 if (!mips_expect_download ("Downloading from "))
3325 if (!mips_expect_download (tftp_name
))
3327 if (!mips_expect_download (", ^C to abort\r\n"))
3331 /* Wait for the stuff that PMON prints after the load has completed.
3332 The timeout value for use in the tftp case (15 seconds) was picked
3333 arbitrarily but might be too small for really large downloads. FIXME. */
3334 switch (mips_monitor
)
3337 pmon_check_ack ("termination");
3338 pmon_check_entry_address ("Entry address is ", final
);
3339 if (!pmon_check_total (bintotal
))
3342 case MON_ROCKHOPPER
:
3343 if (!pmon_check_total (bintotal
))
3345 pmon_check_entry_address ("Entry Address = ", final
);
3348 pmon_check_entry_address ("Entry Address = ", final
);
3349 pmon_check_ack ("termination");
3350 if (!pmon_check_total (bintotal
))
3356 remove (tftp_localname
); /* Remove temporary file. */
3359 /* Write the buffer specified by BUFFER of length LENGTH to either
3360 the board or the temporary file that'll eventually be transferred
3364 pmon_download (char *buffer
, int length
)
3370 written
= fwrite (buffer
, 1, length
, tftp_file
);
3371 if (written
< length
)
3372 perror_with_name (tftp_localname
);
3375 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3378 /* Open object or executable file, FILE, and send it to the board
3379 using the FastLoad format. */
3382 pmon_load_fast (const char *file
)
3386 unsigned char *binbuf
;
3389 unsigned int csum
= 0;
3390 int hashmark
= !tftp_in_use
;
3394 struct cleanup
*cleanup
;
3396 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3397 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3399 abfd
= gdb_bfd_open (file
, NULL
, -1);
3402 printf_filtered ("Unable to open file %s\n", file
);
3405 cleanup
= make_cleanup_bfd_unref (abfd
);
3407 if (bfd_check_format (abfd
, bfd_object
) == 0)
3409 printf_filtered ("File is not an object file\n");
3410 do_cleanups (cleanup
);
3414 /* Setup the required download state: */
3415 mips_send_command ("set dlproto etxack\r", -1);
3416 mips_send_command ("set dlecho off\r", -1);
3417 /* NOTE: We get a "cannot set variable" message if the variable is
3418 already defined to have the argument we give. The code doesn't
3419 care, since it just scans to the next prompt anyway. */
3420 /* Start the download: */
3421 pmon_start_download ();
3423 /* Zero the checksum. */
3424 sprintf (buffer
, "/Kxx\n");
3425 reclen
= strlen (buffer
);
3426 pmon_download (buffer
, reclen
);
3427 finished
= pmon_check_ack ("/Kxx");
3429 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3430 if (s
->flags
& SEC_LOAD
) /* Only deal with loadable sections. */
3432 bintotal
+= bfd_get_section_size (s
);
3433 final
= (s
->vma
+ bfd_get_section_size (s
));
3435 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
,
3436 (unsigned int) s
->vma
,
3437 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3438 gdb_flush (gdb_stdout
);
3440 /* Output the starting address. */
3441 sprintf (buffer
, "/A");
3442 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3443 buffer
[2 + reclen
] = '\n';
3444 buffer
[3 + reclen
] = '\0';
3445 reclen
+= 3; /* For the initial escape code and carriage return. */
3446 pmon_download (buffer
, reclen
);
3447 finished
= pmon_check_ack ("/A");
3451 unsigned int binamount
;
3452 unsigned int zerofill
= 0;
3459 i
< bfd_get_section_size (s
) && !finished
;
3464 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3466 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3468 /* This keeps a rolling checksum, until we decide to output
3470 for (; ((binamount
- binptr
) > 0);)
3472 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3473 &reclen
, &csum
, &zerofill
);
3474 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3476 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3477 pmon_download (buffer
, reclen
);
3478 finished
= pmon_check_ack ("data record");
3481 zerofill
= 0; /* Do not transmit pending
3486 if (deprecated_ui_load_progress_hook
)
3487 deprecated_ui_load_progress_hook (s
->name
, i
);
3491 putchar_unfiltered ('#');
3492 gdb_flush (gdb_stdout
);
3496 reclen
= 0; /* buffer processed */
3501 /* Ensure no out-standing zerofill requests: */
3503 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3505 /* and then flush the line: */
3508 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3509 /* Currently pmon_checkset outputs the line terminator by
3510 default, so we write out the buffer so far: */
3511 pmon_download (buffer
, reclen
);
3512 finished
= pmon_check_ack ("record remnant");
3516 putchar_unfiltered ('\n');
3519 /* Terminate the transfer. We know that we have an empty output
3520 buffer at this point. */
3521 sprintf (buffer
, "/E/E\n"); /* Include dummy padding characters. */
3522 reclen
= strlen (buffer
);
3523 pmon_download (buffer
, reclen
);
3526 { /* Ignore the termination message: */
3527 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3530 { /* Deal with termination message: */
3531 pmon_end_download (final
, bintotal
);
3534 do_cleanups (cleanup
);
3538 /* mips_load -- download a file. */
3541 mips_load (struct target_ops
*self
, const char *file
, int from_tty
)
3543 struct regcache
*regcache
;
3545 /* Get the board out of remote debugging mode. */
3546 if (mips_exit_debug ())
3547 error (_("mips_load: Couldn't get into monitor mode."));
3549 if (mips_monitor
!= MON_IDT
)
3550 pmon_load_fast (file
);
3552 mips_load_srec (file
);
3556 /* Finally, make the PC point at the start address. */
3557 regcache
= get_current_regcache ();
3558 if (mips_monitor
!= MON_IDT
)
3560 /* Work around problem where PMON monitor updates the PC after a load
3561 to a different value than GDB thinks it has. The following ensures
3562 that the regcache_write_pc() WILL update the PC value: */
3563 regcache_invalidate (regcache
,
3564 mips_regnum (get_regcache_arch (regcache
))->pc
);
3567 regcache_write_pc (regcache
, bfd_get_start_address (exec_bfd
));
3570 /* Check to see if a thread is still alive. */
3573 mips_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
3575 if (ptid_equal (ptid
, remote_mips_ptid
))
3576 /* The monitor's task is always alive. */
3582 /* Convert a thread ID to a string. Returns the string in a static
3586 mips_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3588 static char buf
[64];
3590 if (ptid_equal (ptid
, remote_mips_ptid
))
3592 xsnprintf (buf
, sizeof buf
, "Thread <main>");
3596 return normal_pid_to_str (ptid
);
3599 /* Pass the command argument as a packet to PMON verbatim. */
3602 pmon_command (char *args
, int from_tty
)
3604 char buf
[DATA_MAXLEN
+ 1];
3607 sprintf (buf
, "0x0 %s", args
);
3608 mips_send_packet (buf
, 1);
3609 printf_filtered ("Send packet: %s\n", buf
);
3611 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3613 printf_filtered ("Received packet: %s\n", buf
);
3616 /* -Wmissing-prototypes */
3617 extern initialize_file_ftype _initialize_remote_mips
;
3619 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3620 Create target specific commands and perform other initializations
3621 specific to this file. */
3624 _initialize_remote_mips (void)
3626 /* Initialize the fields in mips_ops that are common to all four targets. */
3627 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3628 mips_ops
.to_close
= mips_close
;
3629 mips_ops
.to_detach
= mips_detach
;
3630 mips_ops
.to_resume
= mips_resume
;
3631 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3632 mips_ops
.to_store_registers
= mips_store_registers
;
3633 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3634 mips_ops
.to_xfer_partial
= mips_xfer_partial
;
3635 mips_ops
.to_files_info
= mips_files_info
;
3636 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3637 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3638 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3639 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3640 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3641 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3642 mips_ops
.to_kill
= mips_kill
;
3643 mips_ops
.to_load
= mips_load
;
3644 mips_ops
.to_create_inferior
= mips_create_inferior
;
3645 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3646 mips_ops
.to_thread_alive
= mips_thread_alive
;
3647 mips_ops
.to_pid_to_str
= mips_pid_to_str
;
3648 mips_ops
.to_log_command
= serial_log_command
;
3649 mips_ops
.to_stratum
= process_stratum
;
3650 mips_ops
.to_has_all_memory
= default_child_has_all_memory
;
3651 mips_ops
.to_has_memory
= default_child_has_memory
;
3652 mips_ops
.to_has_stack
= default_child_has_stack
;
3653 mips_ops
.to_has_registers
= default_child_has_registers
;
3654 mips_ops
.to_has_execution
= default_child_has_execution
;
3655 mips_ops
.to_magic
= OPS_MAGIC
;
3657 /* Copy the common fields to all four target vectors. */
3658 rockhopper_ops
= pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3660 /* Initialize target-specific fields in the target vectors. */
3661 mips_ops
.to_shortname
= "mips";
3662 mips_ops
.to_doc
= "\
3663 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3664 The argument is the device it is connected to or, if it contains a colon,\n\
3665 HOST:PORT to access a board over a network";
3666 mips_ops
.to_open
= mips_open
;
3667 mips_ops
.to_wait
= mips_wait
;
3669 pmon_ops
.to_shortname
= "pmon";
3670 pmon_ops
.to_doc
= "\
3671 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3672 line. The argument is the device it is connected to or, if it contains a\n\
3673 colon, HOST:PORT to access a board over a network";
3674 pmon_ops
.to_open
= pmon_open
;
3675 pmon_ops
.to_wait
= mips_wait
;
3677 ddb_ops
.to_shortname
= "ddb";
3679 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3680 line. The first argument is the device it is connected to or, if it contains\n\
3681 a colon, HOST:PORT to access a board over a network. The optional second\n\
3682 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3683 TFTP downloads to the board. The optional third parameter is the local name\n\
3684 of the TFTP temporary file, if it differs from the filename seen by the board.";
3685 ddb_ops
.to_open
= ddb_open
;
3686 ddb_ops
.to_wait
= mips_wait
;
3688 rockhopper_ops
.to_shortname
= "rockhopper";
3689 rockhopper_ops
.to_doc
= ddb_ops
.to_doc
;
3690 rockhopper_ops
.to_open
= rockhopper_open
;
3691 rockhopper_ops
.to_wait
= mips_wait
;
3693 lsi_ops
.to_shortname
= "lsi";
3694 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3695 lsi_ops
.to_open
= lsi_open
;
3696 lsi_ops
.to_wait
= mips_wait
;
3698 /* Add the targets. */
3699 add_target (&mips_ops
);
3700 add_target (&pmon_ops
);
3701 add_target (&ddb_ops
);
3702 add_target (&lsi_ops
);
3703 add_target (&rockhopper_ops
);
3705 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3706 Set timeout in seconds for remote MIPS serial I/O."), _("\
3707 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3709 NULL
, /* FIXME: i18n: */
3710 &setlist
, &showlist
);
3712 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3713 &mips_retransmit_wait
, _("\
3714 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3715 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3716 This is the number of seconds to wait for an acknowledgement to a packet\n\
3717 before resending the packet."),
3719 NULL
, /* FIXME: i18n: */
3720 &setlist
, &showlist
);
3722 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3723 &mips_syn_garbage
, _("\
3724 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3725 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3726 This is the maximum number of characters GDB will ignore when trying to\n\
3727 synchronize with the remote system. A value of -1 means that there is no\n\
3728 limit. (Note that these characters are printed out even though they are\n\
3731 NULL
, /* FIXME: i18n: */
3732 &setlist
, &showlist
);
3734 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3735 &mips_monitor_prompt
, _("\
3736 Set the prompt that GDB expects from the monitor."), _("\
3737 Show the prompt that GDB expects from the monitor."), NULL
,
3739 NULL
, /* FIXME: i18n: */
3740 &setlist
, &showlist
);
3742 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3743 &monitor_warnings
, _("\
3744 Set printing of monitor warnings."), _("\
3745 Show printing of monitor warnings."), _("\
3746 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3748 NULL
, /* FIXME: i18n: */
3749 &setlist
, &showlist
);
3751 add_com ("pmon", class_obscure
, pmon_command
,
3752 _("Send a packet to PMON (must be in debug mode)."));
3754 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3755 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3756 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3757 Use \"on\" to enable the masking and \"off\" to disable it."),
3759 NULL
, /* FIXME: i18n: */
3760 &setlist
, &showlist
);
3761 remote_mips_ptid
= ptid_build (42000, 0, 42000);