1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support. Written by Ian Lance Taylor
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "exceptions.h"
34 #include "gdb_string.h"
38 #include "mips-tdep.h"
39 #include "gdbthread.h"
42 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
43 types passed by breakpoint.c to target_insert_watchpoint.
44 Value 3 is our own invention, and is used for ordinary instruction
45 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
55 /* Prototypes for local functions. */
57 static int mips_readchar (int timeout
);
59 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
62 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
63 int *pch
, int timeout
);
65 static int mips_cksum (const unsigned char *hdr
,
66 const unsigned char *data
, int len
);
68 static void mips_send_packet (const char *s
, int get_ack
);
70 static void mips_send_command (const char *cmd
, int prompt
);
72 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
74 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
75 int *perr
, int timeout
, char *buff
);
77 static void mips_initialize (void);
79 static void mips_open (char *name
, int from_tty
);
81 static void pmon_open (char *name
, int from_tty
);
83 static void ddb_open (char *name
, int from_tty
);
85 static void lsi_open (char *name
, int from_tty
);
87 static void mips_close (int quitting
);
89 static void mips_detach (struct target_ops
*ops
, char *args
, int from_tty
);
91 static int mips_map_regno (struct gdbarch
*, int);
93 static void mips_set_register (int regno
, ULONGEST value
);
95 static void mips_prepare_to_store (struct regcache
*regcache
);
97 static int mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
);
99 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
102 static int mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
,
104 struct mem_attrib
*attrib
,
105 struct target_ops
*target
);
107 static void mips_files_info (struct target_ops
*ignore
);
109 static void mips_mourn_inferior (struct target_ops
*ops
);
111 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
);
113 static int pmon_zeroset (int recsize
, char **buff
, int *amount
,
114 unsigned int *chksum
);
116 static int pmon_checkset (int recsize
, char **buff
, int *value
);
118 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
119 int *inptr
, int inamount
, int *recsize
,
120 unsigned int *csum
, unsigned int *zerofill
);
122 static int pmon_check_ack (char *mesg
);
124 static void pmon_start_download (void);
126 static void pmon_end_download (int final
, int bintotal
);
128 static void pmon_download (char *buffer
, int length
);
130 static void pmon_load_fast (char *file
);
132 static void mips_load (char *file
, int from_tty
);
134 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
135 unsigned char *myaddr
, int len
);
137 static int mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
139 static int mips_clear_breakpoint (CORE_ADDR addr
, int len
,
140 enum break_type type
);
142 static int mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
,
143 enum break_type type
);
145 /* Forward declarations. */
146 extern struct target_ops mips_ops
;
147 extern struct target_ops pmon_ops
;
148 extern struct target_ops ddb_ops
;
149 extern struct target_ops rockhopper_ops
;
151 /* The MIPS remote debugging interface is built on top of a simple
152 packet protocol. Each packet is organized as follows:
154 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
155 may not appear anywhere else in the packet. Any time a SYN is
156 seen, a new packet should be assumed to have begun.
159 This byte contains the upper five bits of the logical length
160 of the data section, plus a single bit indicating whether this
161 is a data packet or an acknowledgement. The documentation
162 indicates that this bit is 1 for a data packet, but the actual
163 board uses 1 for an acknowledgement. The value of the byte is
164 0x40 + (ack ? 0x20 : 0) + (len >> 6)
165 (we always have 0 <= len < 1024). Acknowledgement packets do
166 not carry data, and must have a data length of 0.
168 LEN1 This byte contains the lower six bits of the logical length of
169 the data section. The value is
172 SEQ This byte contains the six bit sequence number of the packet.
175 An acknowlegment packet contains the sequence number of the
176 packet being acknowledged plus 1 modulo 64. Data packets are
177 transmitted in sequence. There may only be one outstanding
178 unacknowledged data packet at a time. The sequence numbers
179 are independent in each direction. If an acknowledgement for
180 the previous packet is received (i.e., an acknowledgement with
181 the sequence number of the packet just sent) the packet just
182 sent should be retransmitted. If no acknowledgement is
183 received within a timeout period, the packet should be
184 retransmitted. This has an unfortunate failure condition on a
185 high-latency line, as a delayed acknowledgement may lead to an
186 endless series of duplicate packets.
188 DATA The actual data bytes follow. The following characters are
189 escaped inline with DLE (ASCII 020, or ^P):
195 The additional DLE characters are not counted in the logical
196 length stored in the TYPE_LEN and LEN1 bytes.
201 These bytes contain an 18 bit checksum of the complete
202 contents of the packet excluding the SEQ byte and the
203 CSUM[123] bytes. The checksum is simply the twos complement
204 addition of all the bytes treated as unsigned characters. The
205 values of the checksum bytes are:
206 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
207 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
208 CSUM3: 0x40 + (cksum & 0x3f)
210 It happens that the MIPS remote debugging protocol always
211 communicates with ASCII strings. Because of this, this
212 implementation doesn't bother to handle the DLE quoting mechanism,
213 since it will never be required. */
217 /* The SYN character which starts each packet. */
220 /* The 0x40 used to offset each packet (this value ensures that all of
221 the header and trailer bytes, other than SYN, are printable ASCII
223 #define HDR_OFFSET 0x40
225 /* The indices of the bytes in the packet header. */
226 #define HDR_INDX_SYN 0
227 #define HDR_INDX_TYPE_LEN 1
228 #define HDR_INDX_LEN1 2
229 #define HDR_INDX_SEQ 3
232 /* The data/ack bit in the TYPE_LEN header byte. */
233 #define TYPE_LEN_DA_BIT 0x20
234 #define TYPE_LEN_DATA 0
235 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
237 /* How to compute the header bytes. */
238 #define HDR_SET_SYN(data, len, seq) (SYN)
239 #define HDR_SET_TYPE_LEN(data, len, seq) \
241 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
242 + (((len) >> 6) & 0x1f))
243 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
244 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
246 /* Check that a header byte is reasonable. */
247 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
249 /* Get data from the header. These macros evaluate their argument
251 #define HDR_IS_DATA(hdr) \
252 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
253 #define HDR_GET_LEN(hdr) \
254 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
255 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
257 /* The maximum data length. */
258 #define DATA_MAXLEN 1023
260 /* The trailer offset. */
261 #define TRLR_OFFSET HDR_OFFSET
263 /* The indices of the bytes in the packet trailer. */
264 #define TRLR_INDX_CSUM1 0
265 #define TRLR_INDX_CSUM2 1
266 #define TRLR_INDX_CSUM3 2
267 #define TRLR_LENGTH 3
269 /* How to compute the trailer bytes. */
270 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
271 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
272 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
274 /* Check that a trailer byte is reasonable. */
275 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
277 /* Get data from the trailer. This evaluates its argument multiple
279 #define TRLR_GET_CKSUM(trlr) \
280 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
281 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
282 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
284 /* The sequence number modulos. */
285 #define SEQ_MODULOS (64)
287 /* PMON commands to load from the serial port or UDP socket. */
288 #define LOAD_CMD "load -b -s tty0\r"
289 #define LOAD_CMD_UDP "load -b -s udp\r"
291 /* The target vectors for the four different remote MIPS targets.
292 These are initialized with code in _initialize_remote_mips instead
293 of static initializers, to make it easier to extend the target_ops
295 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, rockhopper_ops
, lsi_ops
;
297 enum mips_monitor_type
299 /* IDT/SIM monitor being used: */
301 /* PMON monitor being used: */
302 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET]
303 Algorithmics Ltd. Nov 9 1995 17:19:50 */
304 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET]
305 Risq Modular Systems,
306 Thu Jun 6 09:28:40 PDT 1996 */
307 MON_LSI
, /* 4.3.12 [EB,FP],
308 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
310 /* Last and unused value, for sizing vectors, etc. */
313 static enum mips_monitor_type mips_monitor
= MON_LAST
;
315 /* The monitor prompt text. If the user sets the PMON prompt
316 to some new value, the GDB `set monitor-prompt' command must also
317 be used to inform GDB about the expected prompt. Otherwise, GDB
318 will not be able to connect to PMON in mips_initialize().
319 If the `set monitor-prompt' command is not used, the expected
320 default prompt will be set according the target:
327 static char *mips_monitor_prompt
;
329 /* Set to 1 if the target is open. */
330 static int mips_is_open
;
332 /* Currently active target description (if mips_is_open == 1). */
333 static struct target_ops
*current_ops
;
335 /* Set to 1 while the connection is being initialized. */
336 static int mips_initializing
;
338 /* Set to 1 while the connection is being brought down. */
339 static int mips_exiting
;
341 /* The next sequence number to send. */
342 static unsigned int mips_send_seq
;
344 /* The next sequence number we expect to receive. */
345 static unsigned int mips_receive_seq
;
347 /* The time to wait before retransmitting a packet, in seconds. */
348 static int mips_retransmit_wait
= 3;
350 /* The number of times to try retransmitting a packet before giving up. */
351 static int mips_send_retries
= 10;
353 /* The number of garbage characters to accept when looking for an
354 SYN for the next packet. */
355 static int mips_syn_garbage
= 10;
357 /* The time to wait for a packet, in seconds. */
358 static int mips_receive_wait
= 5;
360 /* Set if we have sent a packet to the board but have not yet received
362 static int mips_need_reply
= 0;
364 /* Handle used to access serial I/O stream. */
365 static struct serial
*mips_desc
;
367 /* UDP handle used to download files to target. */
368 static struct serial
*udp_desc
;
369 static int udp_in_use
;
371 /* TFTP filename used to download files to DDB board, in the form
373 static char *tftp_name
; /* host:filename */
374 static char *tftp_localname
; /* filename portion of above */
375 static int tftp_in_use
;
376 static FILE *tftp_file
;
378 /* Counts the number of times the user tried to interrupt the target (usually
380 static int interrupt_count
;
382 /* If non-zero, means that the target is running. */
383 static int mips_wait_flag
= 0;
385 /* If non-zero, monitor supports breakpoint commands. */
386 static int monitor_supports_breakpoints
= 0;
388 /* Data cache header. */
390 #if 0 /* not used (yet?) */
391 static DCACHE
*mips_dcache
;
394 /* Non-zero means that we've just hit a read or write watchpoint. */
395 static int hit_watchpoint
;
397 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
398 The table is indexed by a breakpoint number, which is an integer
399 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
401 #define MAX_LSI_BREAKPOINTS 256
402 struct lsi_breakpoint_info
404 enum break_type type
; /* type of breakpoint */
405 CORE_ADDR addr
; /* address of breakpoint */
406 int len
; /* length of region being watched */
407 unsigned long value
; /* value to watch */
409 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
411 /* Error/warning codes returned by LSI PMON for breakpoint commands.
412 Warning values may be ORed together; error values may not. */
413 #define W_WARN 0x100 /* This bit is set if the error code
415 #define W_MSK 0x101 /* warning: Range feature is supported
417 #define W_VAL 0x102 /* warning: Value check is not
418 supported in hardware */
419 #define W_QAL 0x104 /* warning: Requested qualifiers are
420 not supported in hardware */
422 #define E_ERR 0x200 /* This bit is set if the error code
424 #define E_BPT 0x200 /* error: No such breakpoint number */
425 #define E_RGE 0x201 /* error: Range is not supported */
426 #define E_QAL 0x202 /* error: The requested qualifiers can
428 #define E_OUT 0x203 /* error: Out of hardware resources */
429 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
433 int code
; /* error code */
434 char *string
; /* string associated with this code */
437 struct lsi_error lsi_warning_table
[] =
439 {W_MSK
, "Range feature is supported via mask"},
440 {W_VAL
, "Value check is not supported in hardware"},
441 {W_QAL
, "Requested qualifiers are not supported in hardware"},
445 struct lsi_error lsi_error_table
[] =
447 {E_BPT
, "No such breakpoint number"},
448 {E_RGE
, "Range is not supported"},
449 {E_QAL
, "The requested qualifiers can not be used"},
450 {E_OUT
, "Out of hardware resources"},
451 {E_NON
, "Hardware breakpoint not supported"},
455 /* Set to 1 with the 'set monitor-warnings' command to enable printing
456 of warnings returned by PMON when hardware breakpoints are used. */
457 static int monitor_warnings
;
459 /* This is the ptid we use while we're connected to the remote. Its
460 value is arbitrary, as the remote-mips target doesn't have a notion of
461 processes or threads, but we need something non-null to place in
463 static ptid_t remote_mips_ptid
;
465 /* Close any ports which might be open. Reset certain globals indicating
466 the state of those ports. */
472 serial_close (mips_desc
);
476 serial_close (udp_desc
);
482 /* Handle low-level error that we can't recover from. Note that just
483 error()ing out from target_wait or some such low-level place will cause
484 all hell to break loose--the rest of GDB will tend to get left in an
485 inconsistent state. */
487 static void ATTRIBUTE_NORETURN
488 mips_error (char *string
,...)
492 va_start (args
, string
);
494 target_terminal_ours ();
495 wrap_here (""); /* Force out any buffered output. */
496 gdb_flush (gdb_stdout
);
498 fputs_filtered (error_pre_print
, gdb_stderr
);
499 vfprintf_filtered (gdb_stderr
, string
, args
);
500 fprintf_filtered (gdb_stderr
, "\n");
502 gdb_flush (gdb_stderr
);
504 /* Clean up in such a way that mips_close won't try to talk to the
505 board (it almost surely won't work since we weren't able to talk to
509 printf_unfiltered ("Ending remote MIPS debugging.\n");
510 if (!ptid_equal (inferior_ptid
, null_ptid
))
511 target_mourn_inferior ();
513 deprecated_throw_reason (RETURN_ERROR
);
516 /* putc_readable - print a character, displaying non-printable chars in
517 ^x notation or in hex. */
520 fputc_readable (int ch
, struct ui_file
*file
)
523 fputc_unfiltered ('\n', file
);
525 fprintf_unfiltered (file
, "\\r");
526 else if (ch
< 0x20) /* ASCII control character */
527 fprintf_unfiltered (file
, "^%c", ch
+ '@');
528 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
529 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
531 fputc_unfiltered (ch
, file
);
535 /* puts_readable - print a string, displaying non-printable chars in
536 ^x notation or in hex. */
539 fputs_readable (const char *string
, struct ui_file
*file
)
543 while ((c
= *string
++) != '\0')
544 fputc_readable (c
, file
);
548 /* Read P as a hex value. Return true if every character made sense,
549 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
552 read_hex_value (const char *p
, ULONGEST
*result
)
560 if (*p
>= '0' && *p
<= '9')
562 else if (*p
>= 'A' && *p
<= 'F')
563 retval
|= *p
- 'A' + 10;
564 else if (*p
>= 'a' && *p
<= 'f')
565 retval
|= *p
- 'a' + 10;
575 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
576 timed out. TIMEOUT specifies timeout value in seconds. */
579 mips_expect_timeout (const char *string
, int timeout
)
581 const char *p
= string
;
585 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
586 fputs_readable (string
, gdb_stdlog
);
587 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
595 /* Must use serial_readchar() here cuz mips_readchar would get
596 confused if we were waiting for the mips_monitor_prompt... */
598 c
= serial_readchar (mips_desc
, timeout
);
600 if (c
== SERIAL_TIMEOUT
)
603 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
608 fputc_readable (c
, gdb_stdlog
);
616 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
629 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
630 timed out. The timeout value is hard-coded to 2 seconds. Use
631 mips_expect_timeout if a different timeout value is needed. */
634 mips_expect (const char *string
)
636 return mips_expect_timeout (string
, remote_timeout
);
639 /* Read a character from the remote, aborting on error. Returns
640 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
641 returns). FIXME: If we see the string mips_monitor_prompt from the
642 board, then we are debugging on the main console port, and we have
643 somehow dropped out of remote debugging mode. In this case, we
644 automatically go back in to remote debugging mode. This is a hack,
645 put in because I can't find any way for a program running on the
646 remote board to terminate without also ending remote debugging
647 mode. I assume users won't have any trouble with this; for one
648 thing, the IDT documentation generally assumes that the remote
649 debugging port is not the console port. This is, however, very
650 convenient for DejaGnu when you only have one connected serial
654 mips_readchar (int timeout
)
657 static int state
= 0;
658 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
660 { /* FIXME this whole block is dead code! */
664 if (i
== -1 && watchdog
> 0)
668 if (state
== mips_monitor_prompt_len
)
670 ch
= serial_readchar (mips_desc
, timeout
);
672 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off. */
674 target_mourn_inferior ();
675 error (_("Watchdog has expired. Target detached.\n"));
678 if (ch
== SERIAL_EOF
)
679 mips_error (_("End of file from remote"));
680 if (ch
== SERIAL_ERROR
)
681 mips_error (_("Error reading from remote: %s"), safe_strerror (errno
));
682 if (remote_debug
> 1)
684 /* Don't use _filtered; we can't deal with a QUIT out of
685 target_wait, and I think this might be called from there. */
686 if (ch
!= SERIAL_TIMEOUT
)
687 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
689 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
692 /* If we have seen mips_monitor_prompt and we either time out, or
693 we see a @ (which was echoed from a packet we sent), reset the
694 board as described above. The first character in a packet after
695 the SYN (which is not echoed) is always an @ unless the packet is
696 more than 64 characters long, which ours never are. */
697 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
698 && state
== mips_monitor_prompt_len
699 && !mips_initializing
702 if (remote_debug
> 0)
703 /* Don't use _filtered; we can't deal with a QUIT out of
704 target_wait, and I think this might be called from there. */
705 fprintf_unfiltered (gdb_stdlog
,
706 "Reinitializing MIPS debugging mode\n");
713 /* At this point, about the only thing we can do is abort the command
714 in progress and get back to command level as quickly as possible. */
716 error (_("Remote board reset, debug protocol re-initialized."));
719 if (ch
== mips_monitor_prompt
[state
])
727 /* Get a packet header, putting the data in the supplied buffer.
728 PGARBAGE is a pointer to the number of garbage characters received
729 so far. CH is the last character received. Returns 0 for success,
730 or -1 for timeout. */
733 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
739 /* Wait for a SYN. mips_syn_garbage is intended to prevent
740 sitting here indefinitely if the board sends us one garbage
741 character per second. ch may already have a value from the
742 last time through the loop. */
745 ch
= mips_readchar (timeout
);
746 if (ch
== SERIAL_TIMEOUT
)
750 /* Printing the character here lets the user of gdb see
751 what the program is outputting, if the debugging is
752 being done on the console port. Don't use _filtered:
753 we can't deal with a QUIT out of target_wait and
754 buffered target output confuses the user. */
755 if (!mips_initializing
|| remote_debug
> 0)
757 if (isprint (ch
) || isspace (ch
))
759 fputc_unfiltered (ch
, gdb_stdtarg
);
763 fputc_readable (ch
, gdb_stdtarg
);
765 gdb_flush (gdb_stdtarg
);
768 /* Only count unprintable characters. */
769 if (! (isprint (ch
) || isspace (ch
)))
772 if (mips_syn_garbage
> 0
773 && *pgarbage
> mips_syn_garbage
)
774 mips_error (_("Debug protocol failure: more "
775 "than %d characters before a sync."),
780 /* Get the packet header following the SYN. */
781 for (i
= 1; i
< HDR_LENGTH
; i
++)
783 ch
= mips_readchar (timeout
);
784 if (ch
== SERIAL_TIMEOUT
)
786 /* Make sure this is a header byte. */
787 if (ch
== SYN
|| !HDR_CHECK (ch
))
793 /* If we got the complete header, we can return. Otherwise we
794 loop around and keep looking for SYN. */
800 /* Get a packet header, putting the data in the supplied buffer.
801 PGARBAGE is a pointer to the number of garbage characters received
802 so far. The last character read is returned in *PCH. Returns 0
803 for success, -1 for timeout, -2 for error. */
806 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
807 int *pch
, int timeout
)
812 for (i
= 0; i
< TRLR_LENGTH
; i
++)
814 ch
= mips_readchar (timeout
);
816 if (ch
== SERIAL_TIMEOUT
)
818 if (!TRLR_CHECK (ch
))
825 /* Get the checksum of a packet. HDR points to the packet header.
826 DATA points to the packet data. LEN is the length of DATA. */
829 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
831 const unsigned char *p
;
837 /* The initial SYN is not included in the checksum. */
851 /* Send a packet containing the given ASCII string. */
854 mips_send_packet (const char *s
, int get_ack
)
856 /* unsigned */ int len
;
857 unsigned char *packet
;
862 if (len
> DATA_MAXLEN
)
863 mips_error (_("MIPS protocol data packet too long: %s"), s
);
865 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
867 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
868 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
869 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
870 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
872 memcpy (packet
+ HDR_LENGTH
, s
, len
);
874 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
875 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
876 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
877 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
879 /* Increment the sequence number. This will set mips_send_seq to
880 the sequence number we expect in the acknowledgement. */
881 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
883 /* We can only have one outstanding data packet, so we just wait for
884 the acknowledgement here. Keep retransmitting the packet until
885 we get one, or until we've tried too many times. */
886 for (try = 0; try < mips_send_retries
; try++)
891 if (remote_debug
> 0)
893 /* Don't use _filtered; we can't deal with a QUIT out of
894 target_wait, and I think this might be called from there. */
895 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
896 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
899 if (serial_write (mips_desc
, packet
,
900 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
901 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
910 unsigned char hdr
[HDR_LENGTH
+ 1];
911 unsigned char trlr
[TRLR_LENGTH
+ 1];
915 /* Get the packet header. If we time out, resend the data
917 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
923 /* If we get a data packet, assume it is a duplicate and
924 ignore it. FIXME: If the acknowledgement is lost, this
925 data packet may be the packet the remote sends after the
927 if (HDR_IS_DATA (hdr
))
931 /* Ignore any errors raised whilst attempting to ignore
934 len
= HDR_GET_LEN (hdr
);
936 for (i
= 0; i
< len
; i
++)
940 rch
= mips_readchar (remote_timeout
);
946 if (rch
== SERIAL_TIMEOUT
)
948 /* Ignore the character. */
952 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
955 /* We don't bother checking the checksum, or providing an
956 ACK to the packet. */
960 /* If the length is not 0, this is a garbled packet. */
961 if (HDR_GET_LEN (hdr
) != 0)
964 /* Get the packet trailer. */
965 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
966 mips_retransmit_wait
);
968 /* If we timed out, resend the data packet. */
972 /* If we got a bad character, reread the header. */
976 /* If the checksum does not match the trailer checksum, this
977 is a bad packet; ignore it. */
978 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
979 != TRLR_GET_CKSUM (trlr
))
982 if (remote_debug
> 0)
984 hdr
[HDR_LENGTH
] = '\0';
985 trlr
[TRLR_LENGTH
] = '\0';
986 /* Don't use _filtered; we can't deal with a QUIT out of
987 target_wait, and I think this might be called from there. */
988 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
989 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
992 /* If this ack is for the current packet, we're done. */
993 seq
= HDR_GET_SEQ (hdr
);
994 if (seq
== mips_send_seq
)
997 /* If this ack is for the last packet, resend the current
999 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
1002 /* Otherwise this is a bad ack; ignore it. Increment the
1003 garbage count to ensure that we do not stay in this loop
1009 mips_error (_("Remote did not acknowledge packet"));
1012 /* Receive and acknowledge a packet, returning the data in BUFF (which
1013 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1014 implies that only the sender retransmits packets, so this code just
1015 waits silently for a packet. It returns the length of the received
1016 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1017 don't print an error message and return -1. */
1020 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1025 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1032 unsigned char hdr
[HDR_LENGTH
];
1033 unsigned char trlr
[TRLR_LENGTH
];
1037 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1040 mips_error (_("Timed out waiting for remote packet"));
1047 /* An acknowledgement is probably a duplicate; ignore it. */
1048 if (!HDR_IS_DATA (hdr
))
1050 len
= HDR_GET_LEN (hdr
);
1051 /* Check if the length is valid for an ACK, we may aswell
1052 try and read the remainder of the packet: */
1055 /* Ignore the error condition, since we are going to
1056 ignore the packet anyway. */
1057 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1059 /* Don't use _filtered; we can't deal with a QUIT out of
1060 target_wait, and I think this might be called from there. */
1061 if (remote_debug
> 0)
1062 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1066 len
= HDR_GET_LEN (hdr
);
1067 for (i
= 0; i
< len
; i
++)
1071 rch
= mips_readchar (timeout
);
1077 if (rch
== SERIAL_TIMEOUT
)
1080 mips_error (_("Timed out waiting for remote packet"));
1089 /* Don't use _filtered; we can't deal with a QUIT out of
1090 target_wait, and I think this might be called from there. */
1091 if (remote_debug
> 0)
1092 fprintf_unfiltered (gdb_stdlog
,
1093 "Got new SYN after %d chars (wanted %d)\n",
1098 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1102 mips_error (_("Timed out waiting for packet"));
1108 /* Don't use _filtered; we can't deal with a QUIT out of
1109 target_wait, and I think this might be called from there. */
1110 if (remote_debug
> 0)
1111 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1115 /* If this is the wrong sequence number, ignore it. */
1116 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
1118 /* Don't use _filtered; we can't deal with a QUIT out of
1119 target_wait, and I think this might be called from there. */
1120 if (remote_debug
> 0)
1121 fprintf_unfiltered (gdb_stdlog
,
1122 "Ignoring sequence number %d (want %d)\n",
1123 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1127 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1130 if (remote_debug
> 0)
1131 /* Don't use _filtered; we can't deal with a QUIT out of
1132 target_wait, and I think this might be called from there. */
1133 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1134 mips_cksum (hdr
, buff
, len
),
1135 TRLR_GET_CKSUM (trlr
));
1137 /* The checksum failed. Send an acknowledgement for the
1138 previous packet to tell the remote to resend the packet. */
1139 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1140 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1141 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1142 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1144 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1146 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1147 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1148 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1150 if (remote_debug
> 0)
1152 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1153 /* Don't use _filtered; we can't deal with a QUIT out of
1154 target_wait, and I think this might be called from there. */
1155 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1159 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1162 mips_error (_("write to target failed: %s"),
1163 safe_strerror (errno
));
1169 if (remote_debug
> 0)
1172 /* Don't use _filtered; we can't deal with a QUIT out of
1173 target_wait, and I think this might be called from there. */
1174 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1177 /* We got the packet. Send an acknowledgement. */
1178 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1180 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1181 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1182 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1183 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1185 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1187 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1188 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1189 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1191 if (remote_debug
> 0)
1193 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1194 /* Don't use _filtered; we can't deal with a QUIT out of
1195 target_wait, and I think this might be called from there. */
1196 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1200 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1203 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
1211 /* Optionally send a request to the remote system and optionally wait
1212 for the reply. This implements the remote debugging protocol,
1213 which is built on top of the packet protocol defined above. Each
1214 request has an ADDR argument and a DATA argument. The following
1215 requests are defined:
1217 \0 don't send a request; just wait for a reply
1218 i read word from instruction space at ADDR
1219 d read word from data space at ADDR
1220 I write DATA to instruction space at ADDR
1221 D write DATA to data space at ADDR
1222 r read register number ADDR
1223 R set register number ADDR to value DATA
1224 c continue execution (if ADDR != 1, set pc to ADDR)
1225 s single step (if ADDR != 1, set pc to ADDR)
1227 The read requests return the value requested. The write requests
1228 return the previous value in the changed location. The execution
1229 requests return a UNIX wait value (the approximate signal which
1230 caused execution to stop is in the upper eight bits).
1232 If PERR is not NULL, this function waits for a reply. If an error
1233 occurs, it sets *PERR to 1 and sets errno according to what the
1234 target board reports. */
1237 mips_request (int cmd
,
1244 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
1245 char myBuff
[DATA_MAXLEN
+ 1];
1246 char response_string
[17];
1253 if (buff
== (char *) NULL
)
1258 if (mips_need_reply
)
1259 internal_error (__FILE__
, __LINE__
,
1260 _("mips_request: Trying to send "
1261 "command before reply"));
1262 /* 'T' sets a register to a 64-bit value, so make sure we use
1263 the right conversion function. */
1265 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1266 phex_nz (addr
, addr_size
), phex_nz (data
, 8));
1268 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1269 phex_nz (addr
, addr_size
), phex_nz (data
, addr_size
));
1271 mips_send_packet (buff
, 1);
1272 mips_need_reply
= 1;
1275 if (perr
== (int *) NULL
)
1278 if (!mips_need_reply
)
1279 internal_error (__FILE__
, __LINE__
,
1280 _("mips_request: Trying to get reply before command"));
1282 mips_need_reply
= 0;
1284 len
= mips_receive_packet (buff
, 1, timeout
);
1287 if (sscanf (buff
, "0x%x %c 0x%x 0x%16s",
1288 &rpid
, &rcmd
, &rerrflg
, response_string
) != 4
1289 || !read_hex_value (response_string
, &rresponse
)
1290 || (cmd
!= '\0' && rcmd
!= cmd
))
1291 mips_error (_("Bad response from remote board"));
1297 /* FIXME: This will returns MIPS errno numbers, which may or may
1298 not be the same as errno values used on other systems. If
1299 they stick to common errno values, they will be the same, but
1300 if they don't, they must be translated. */
1310 /* Cleanup associated with mips_initialize(). */
1313 mips_initialize_cleanups (void *arg
)
1315 mips_initializing
= 0;
1318 /* Cleanup associated with mips_exit_debug(). */
1321 mips_exit_cleanups (void *arg
)
1326 /* Send a command and wait for that command to be echoed back. Wait,
1327 too, for the following prompt. */
1330 mips_send_command (const char *cmd
, int prompt
)
1332 serial_write (mips_desc
, cmd
, strlen (cmd
));
1336 mips_expect (mips_monitor_prompt
);
1339 /* Enter remote (dbx) debug mode: */
1342 mips_enter_debug (void)
1344 /* Reset the sequence numbers, ready for the new debug sequence: */
1346 mips_receive_seq
= 0;
1348 if (mips_monitor
!= MON_IDT
)
1349 mips_send_command ("debug\r", 0);
1350 else /* Assume IDT monitor by default. */
1351 mips_send_command ("db tty0\r", 0);
1354 serial_write (mips_desc
, "\r", sizeof "\r" - 1);
1356 /* We don't need to absorb any spurious characters here, since the
1357 mips_receive_header will eat up a reasonable number of characters
1358 whilst looking for the SYN, however this avoids the "garbage"
1359 being displayed to the user. */
1360 if (mips_monitor
!= MON_IDT
)
1364 char buff
[DATA_MAXLEN
+ 1];
1366 if (mips_receive_packet (buff
, 1, 3) < 0)
1367 mips_error (_("Failed to initialize (didn't receive packet)."));
1371 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1374 mips_exit_debug (void)
1377 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1381 if (mips_monitor
!= MON_IDT
&& mips_monitor
!= MON_ROCKHOPPER
)
1383 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1384 so we do not get a reply to this command: */
1385 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1386 mips_need_reply
= 0;
1387 if (!mips_expect (" break!"))
1391 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1393 if (!mips_expect (mips_monitor_prompt
))
1396 do_cleanups (old_cleanups
);
1401 /* Initialize a new connection to the MIPS board, and make sure we are
1402 really connected. */
1405 mips_initialize (void)
1408 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1411 /* What is this code doing here? I don't see any way it can happen, and
1412 it might mean mips_initializing didn't get cleared properly.
1413 So I'll make it a warning. */
1415 if (mips_initializing
)
1417 warning (_("internal error: mips_initialize called twice"));
1422 mips_initializing
= 1;
1424 /* At this point, the packit protocol isn't responding. We'll try getting
1425 into the monitor, and restarting the protocol. */
1427 /* Force the system into the monitor. After this we *should* be at
1428 the mips_monitor_prompt. */
1429 if (mips_monitor
!= MON_IDT
)
1430 j
= 0; /* Start by checking if we are already
1433 j
= 1; /* Start by sending a break. */
1438 case 0: /* First, try sending a CR. */
1439 serial_flush_input (mips_desc
);
1440 serial_write (mips_desc
, "\r", 1);
1442 case 1: /* First, try sending a break. */
1443 serial_send_break (mips_desc
);
1445 case 2: /* Then, try a ^C. */
1446 serial_write (mips_desc
, "\003", 1);
1448 case 3: /* Then, try escaping from download. */
1450 if (mips_monitor
!= MON_IDT
)
1454 /* We shouldn't need to send multiple termination
1455 sequences, since the target performs line (or
1456 block) reads, and then processes those
1457 packets. In-case we were downloading a large packet
1458 we flush the output buffer before inserting a
1459 termination sequence. */
1460 serial_flush_output (mips_desc
);
1461 sprintf (tbuff
, "\r/E/E\r");
1462 serial_write (mips_desc
, tbuff
, 6);
1469 /* We are possibly in binary download mode, having
1470 aborted in the middle of an S-record. ^C won't
1471 work because of binary mode. The only reliable way
1472 out is to send enough termination packets (8 bytes)
1473 to fill up and then overflow the largest size
1474 S-record (255 bytes in this case). This amounts to
1475 256/8 + 1 packets. */
1477 mips_make_srec (srec
, '7', 0, NULL
, 0);
1479 for (i
= 1; i
<= 33; i
++)
1481 serial_write (mips_desc
, srec
, 8);
1483 if (serial_readchar (mips_desc
, 0) >= 0)
1484 break; /* Break immediatly if we get something from
1491 mips_error (_("Failed to initialize."));
1494 if (mips_expect (mips_monitor_prompt
))
1498 if (mips_monitor
!= MON_IDT
)
1500 /* Sometimes PMON ignores the first few characters in the first
1501 command sent after a load. Sending a blank command gets
1503 mips_send_command ("\r", -1);
1505 /* Ensure the correct target state: */
1506 if (mips_monitor
!= MON_LSI
)
1507 mips_send_command ("set regsize 64\r", -1);
1508 mips_send_command ("set hostport tty0\r", -1);
1509 mips_send_command ("set brkcmd \"\"\r", -1);
1510 /* Delete all the current breakpoints: */
1511 mips_send_command ("db *\r", -1);
1512 /* NOTE: PMON does not have breakpoint support through the
1513 "debug" mode, only at the monitor command-line. */
1516 mips_enter_debug ();
1518 /* Clear all breakpoints: */
1519 if ((mips_monitor
== MON_IDT
1520 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1521 || mips_monitor
== MON_LSI
)
1522 monitor_supports_breakpoints
= 1;
1524 monitor_supports_breakpoints
= 0;
1526 do_cleanups (old_cleanups
);
1528 /* If this doesn't call error, we have connected; we don't care if
1529 the request itself succeeds or fails. */
1531 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1534 /* Open a connection to the remote board. */
1537 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1538 enum mips_monitor_type new_monitor
,
1539 const char *new_monitor_prompt
)
1542 char *serial_port_name
;
1543 char *remote_name
= 0;
1544 char *local_name
= 0;
1549 To open a MIPS remote debugging connection, you need to specify what\n\
1550 serial device is attached to the target board (e.g., /dev/ttya).\n\
1551 If you want to use TFTP to download to the board, specify the name of a\n\
1552 temporary file to be used by GDB for downloads as the second argument.\n\
1553 This filename must be in the form host:filename, where host is the name\n\
1554 of the host running the TFTP server, and the file must be readable by the\n\
1555 world. If the local name of the temporary file differs from the name as\n\
1556 seen from the board via TFTP, specify that name as the third parameter.\n"));
1558 /* Parse the serial port name, the optional TFTP name, and the
1559 optional local TFTP name. */
1560 argv
= gdb_buildargv (name
);
1561 make_cleanup_freeargv (argv
);
1563 serial_port_name
= xstrdup (argv
[0]);
1564 if (argv
[1]) /* Remote TFTP name specified? */
1566 remote_name
= argv
[1];
1567 if (argv
[2]) /* Local TFTP filename specified? */
1568 local_name
= argv
[2];
1571 target_preopen (from_tty
);
1574 unpush_target (current_ops
);
1576 /* Open and initialize the serial port. */
1577 mips_desc
= serial_open (serial_port_name
);
1578 if (mips_desc
== NULL
)
1579 perror_with_name (serial_port_name
);
1581 if (baud_rate
!= -1)
1583 if (serial_setbaudrate (mips_desc
, baud_rate
))
1585 serial_close (mips_desc
);
1586 perror_with_name (serial_port_name
);
1590 serial_raw (mips_desc
);
1592 /* Open and initialize the optional download port. If it is in the form
1593 hostname#portnumber, it's a UDP socket. If it is in the form
1594 hostname:filename, assume it's the TFTP filename that must be
1595 passed to the DDB board to tell it where to get the load file. */
1598 if (strchr (remote_name
, '#'))
1600 udp_desc
= serial_open (remote_name
);
1602 perror_with_name (_("Unable to open UDP port"));
1607 /* Save the remote and local names of the TFTP temp file. If
1608 the user didn't specify a local name, assume it's the same
1609 as the part of the remote name after the "host:". */
1613 xfree (tftp_localname
);
1614 if (local_name
== NULL
)
1615 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1616 local_name
++; /* Skip over the colon. */
1617 if (local_name
== NULL
)
1618 local_name
= remote_name
; /* Local name same as remote name. */
1619 tftp_name
= xstrdup (remote_name
);
1620 tftp_localname
= xstrdup (local_name
);
1628 /* Reset the expected monitor prompt if it's never been set before. */
1629 if (mips_monitor_prompt
== NULL
)
1630 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1631 mips_monitor
= new_monitor
;
1636 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1638 /* Switch to using remote target now. */
1641 inferior_ptid
= remote_mips_ptid
;
1642 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid
));
1643 add_thread_silent (inferior_ptid
);
1645 /* Try to figure out the processor model if possible. */
1646 deprecated_mips_set_processor_regs_hack ();
1648 /* This is really the job of start_remote however, that makes an
1649 assumption that the target is about to print out a status message
1650 of some sort. That doesn't happen here (in fact, it may not be
1651 possible to get the monitor to send the appropriate packet). */
1653 reinit_frame_cache ();
1654 registers_changed ();
1655 stop_pc
= regcache_read_pc (get_current_regcache ());
1656 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
);
1657 xfree (serial_port_name
);
1660 /* Open a connection to an IDT board. */
1663 mips_open (char *name
, int from_tty
)
1665 const char *monitor_prompt
= NULL
;
1666 if (gdbarch_bfd_arch_info (target_gdbarch
) != NULL
1667 && gdbarch_bfd_arch_info (target_gdbarch
)->arch
== bfd_arch_mips
)
1669 switch (gdbarch_bfd_arch_info (target_gdbarch
)->mach
)
1671 case bfd_mach_mips4100
:
1672 case bfd_mach_mips4300
:
1673 case bfd_mach_mips4600
:
1674 case bfd_mach_mips4650
:
1675 case bfd_mach_mips5000
:
1676 monitor_prompt
= "<RISQ> ";
1680 if (monitor_prompt
== NULL
)
1681 monitor_prompt
= "<IDT>";
1682 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1685 /* Open a connection to a PMON board. */
1688 pmon_open (char *name
, int from_tty
)
1690 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1693 /* Open a connection to a DDB board. */
1696 ddb_open (char *name
, int from_tty
)
1698 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1701 /* Open a connection to a rockhopper board. */
1704 rockhopper_open (char *name
, int from_tty
)
1706 common_open (&rockhopper_ops
, name
, from_tty
, MON_ROCKHOPPER
, "NEC01>");
1709 /* Open a connection to an LSI board. */
1712 lsi_open (char *name
, int from_tty
)
1716 /* Clear the LSI breakpoint table. */
1717 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1718 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1720 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1723 /* Close a connection to the remote board. */
1726 mips_close (int quitting
)
1730 /* Get the board out of remote debugging mode. */
1731 (void) mips_exit_debug ();
1736 generic_mourn_inferior ();
1739 /* Detach from the remote board. */
1742 mips_detach (struct target_ops
*ops
, char *args
, int from_tty
)
1745 error (_("Argument given to \"detach\" when remotely debugging."));
1752 printf_unfiltered ("Ending remote MIPS debugging.\n");
1755 /* Tell the target board to resume. This does not wait for a reply
1756 from the board, except in the case of single-stepping on LSI boards,
1757 where PMON does return a reply. */
1760 mips_resume (struct target_ops
*ops
,
1761 ptid_t ptid
, int step
, enum target_signal siggnal
)
1765 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1766 a single step, so we wait for that. */
1767 mips_request (step
? 's' : 'c', 1, siggnal
,
1768 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1769 mips_receive_wait
, NULL
);
1772 /* Return the signal corresponding to SIG, where SIG is the number which
1773 the MIPS protocol uses for the signal. */
1775 static enum target_signal
1776 mips_signal_from_protocol (int sig
)
1778 /* We allow a few more signals than the IDT board actually returns, on
1779 the theory that there is at least *some* hope that perhaps the numbering
1780 for these signals is widely agreed upon. */
1783 return TARGET_SIGNAL_UNKNOWN
;
1785 /* Don't want to use target_signal_from_host because we are converting
1786 from MIPS signal numbers, not host ones. Our internal numbers
1787 match the MIPS numbers for the signals the board can return, which
1788 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1789 return (enum target_signal
) sig
;
1792 /* Set the register designated by REGNO to the value designated by VALUE. */
1795 mips_set_register (int regno
, ULONGEST value
)
1797 char buf
[MAX_REGISTER_SIZE
];
1798 struct regcache
*regcache
= get_current_regcache ();
1799 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1800 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1802 /* We got the number the register holds, but gdb expects to see a
1803 value in the target byte ordering. */
1805 if (mips_monitor
!= MON_ROCKHOPPER
1806 && (regno
== mips_regnum (gdbarch
)->pc
|| regno
< 32))
1807 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1808 In such cases we can only really debug 32-bit code properly so,
1809 when reading a GPR or the PC, assume that the full 64-bit
1810 value is the sign extension of the lower 32 bits. */
1811 store_signed_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1814 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1817 regcache_raw_supply (regcache
, regno
, buf
);
1820 /* Wait until the remote stops, and return a wait status. */
1823 mips_wait (struct target_ops
*ops
,
1824 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1828 char buff
[DATA_MAXLEN
];
1829 ULONGEST rpc
, rfp
, rsp
;
1830 char pc_string
[17], fp_string
[17], sp_string
[17], flags
[20];
1834 interrupt_count
= 0;
1837 /* If we have not sent a single step or continue command, then the
1838 board is waiting for us to do something. Return a status
1839 indicating that it is stopped. */
1840 if (!mips_need_reply
)
1842 status
->kind
= TARGET_WAITKIND_STOPPED
;
1843 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1844 return inferior_ptid
;
1847 /* No timeout; we sit here as long as the program continues to execute. */
1849 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1852 mips_error (_("Remote failure: %s"), safe_strerror (errno
));
1854 /* On returning from a continue, the PMON monitor seems to start
1855 echoing back the messages we send prior to sending back the
1856 ACK. The code can cope with this, but to try and avoid the
1857 unnecessary serial traffic, and "spurious" characters displayed
1858 to the user, we cheat and reset the debug protocol. The problems
1859 seems to be caused by a check on the number of arguments, and the
1860 command length, within the monitor causing it to echo the command
1862 if (mips_monitor
== MON_PMON
)
1865 mips_enter_debug ();
1868 /* See if we got back extended status. If so, pick out the pc, fp,
1871 nfields
= sscanf (buff
,
1872 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1873 pc_string
, fp_string
, sp_string
, flags
);
1875 && read_hex_value (pc_string
, &rpc
)
1876 && read_hex_value (fp_string
, &rfp
)
1877 && read_hex_value (sp_string
, &rsp
))
1879 struct regcache
*regcache
= get_current_regcache ();
1880 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1882 mips_set_register (gdbarch_pc_regnum (gdbarch
), rpc
);
1883 mips_set_register (30, rfp
);
1884 mips_set_register (gdbarch_sp_regnum (gdbarch
), rsp
);
1890 for (i
= 0; i
<= 2; i
++)
1891 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1893 else if (flags
[i
] == '\000')
1898 if (strcmp (target_shortname
, "lsi") == 0)
1901 /* If this is an LSI PMON target, see if we just hit a
1902 hardrdware watchpoint. Right now, PMON doesn't give us
1903 enough information to determine which breakpoint we hit. So
1904 we have to look up the PC in our own table of breakpoints,
1905 and if found, assume it's just a normal instruction fetch
1906 breakpoint, not a data watchpoint. FIXME when PMON provides
1907 some way to tell us what type of breakpoint it is. */
1909 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1912 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1914 if (lsi_breakpoints
[i
].addr
== pc
1915 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1922 /* If a data breakpoint was hit, PMON returns the following packet:
1924 The return packet from an ordinary breakpoint doesn't have the
1925 extra 0x01 field tacked onto the end. */
1926 if (nfields
== 1 && rpc
== 1)
1931 /* NOTE: The following (sig) numbers are defined by PMON:
1932 SPP_SIGTRAP 5 breakpoint
1940 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1941 and so on, because the constants we want here are determined by the
1942 MIPS protocol and have nothing to do with what host we are running on. */
1943 if ((rstatus
& 0xff) == 0)
1945 status
->kind
= TARGET_WAITKIND_EXITED
;
1946 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1948 else if ((rstatus
& 0xff) == 0x7f)
1950 status
->kind
= TARGET_WAITKIND_STOPPED
;
1951 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1953 /* If the stop PC is in the _exit function, assume
1954 we hit the 'break 0x3ff' instruction in _exit, so this
1955 is not a normal breakpoint. */
1956 if (strcmp (target_shortname
, "lsi") == 0)
1959 CORE_ADDR func_start
;
1960 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1962 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1963 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1964 && func_start
== pc
)
1965 status
->kind
= TARGET_WAITKIND_EXITED
;
1970 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1971 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1974 return inferior_ptid
;
1977 /* We have to map between the register numbers used by gdb and the
1978 register numbers used by the debugging protocol. */
1980 #define REGNO_OFFSET 96
1983 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1987 if (regno
>= mips_regnum (gdbarch
)->fp0
1988 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1989 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1990 else if (regno
== mips_regnum (gdbarch
)->pc
)
1991 return REGNO_OFFSET
+ 0;
1992 else if (regno
== mips_regnum (gdbarch
)->cause
)
1993 return REGNO_OFFSET
+ 1;
1994 else if (regno
== mips_regnum (gdbarch
)->hi
)
1995 return REGNO_OFFSET
+ 2;
1996 else if (regno
== mips_regnum (gdbarch
)->lo
)
1997 return REGNO_OFFSET
+ 3;
1998 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
1999 return REGNO_OFFSET
+ 4;
2000 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
2001 return REGNO_OFFSET
+ 5;
2003 /* FIXME: Is there a way to get the status register? */
2007 /* Fetch the remote registers. */
2010 mips_fetch_registers (struct target_ops
*ops
,
2011 struct regcache
*regcache
, int regno
)
2013 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2014 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2020 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2021 mips_fetch_registers (ops
, regcache
, regno
);
2025 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
2026 || regno
== MIPS_ZERO_REGNUM
)
2027 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2028 supposed to read zero (see also mips-nat.c). */
2032 /* If PMON doesn't support this register, don't waste serial
2033 bandwidth trying to read it. */
2034 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
2036 if (regno
!= 0 && pmon_reg
== 0)
2040 /* Unfortunately the PMON version in the Vr4300 board has been
2041 compiled without the 64bit register access commands. This
2042 means we cannot get hold of the full register width. */
2043 if (mips_monitor
== MON_DDB
|| mips_monitor
== MON_ROCKHOPPER
)
2044 val
= mips_request ('t', pmon_reg
, 0,
2045 &err
, mips_receive_wait
, NULL
);
2047 val
= mips_request ('r', pmon_reg
, 0,
2048 &err
, mips_receive_wait
, NULL
);
2050 mips_error (_("Can't read register %d: %s"), regno
,
2051 safe_strerror (errno
));
2055 mips_set_register (regno
, val
);
2058 /* Prepare to store registers. The MIPS protocol can store individual
2059 registers, so this function doesn't have to do anything. */
2062 mips_prepare_to_store (struct regcache
*regcache
)
2066 /* Store remote register(s). */
2069 mips_store_registers (struct target_ops
*ops
,
2070 struct regcache
*regcache
, int regno
)
2072 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2078 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2079 mips_store_registers (ops
, regcache
, regno
);
2083 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
2084 mips_request (mips_monitor
== MON_ROCKHOPPER
? 'T' : 'R',
2085 mips_map_regno (gdbarch
, regno
),
2087 &err
, mips_receive_wait
, NULL
);
2089 mips_error (_("Can't write register %d: %s"), regno
,
2090 safe_strerror (errno
));
2093 /* Fetch a word from the target board. Return word fetched in location
2094 addressed by VALP. Return 0 when successful; return positive error
2098 mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
)
2102 *valp
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2105 /* Data space failed; try instruction space. */
2106 *valp
= mips_request ('i', addr
, 0, &err
,
2107 mips_receive_wait
, NULL
);
2112 /* Store a word to the target board. Returns errno code or zero for
2113 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2114 memory location there. */
2116 /* FIXME! make sure only 32-bit quantities get stored! */
2118 mips_store_word (CORE_ADDR addr
, unsigned int val
, int *old_contents
)
2121 unsigned int oldcontents
;
2123 oldcontents
= mips_request ('D', addr
, val
, &err
,
2124 mips_receive_wait
, NULL
);
2127 /* Data space failed; try instruction space. */
2128 oldcontents
= mips_request ('I', addr
, val
, &err
,
2129 mips_receive_wait
, NULL
);
2133 if (old_contents
!= NULL
)
2134 *old_contents
= oldcontents
;
2138 /* Read or write LEN bytes from inferior memory at MEMADDR,
2139 transferring to or from debugger address MYADDR. Write to inferior
2140 if SHOULD_WRITE is nonzero. Returns length of data written or
2141 read; 0 for error. Note that protocol gives us the correct value
2142 for a longword, since it transfers values in ASCII. We want the
2143 byte values, so we have to swap the longword values. */
2145 static int mask_address_p
= 1;
2148 mips_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
, int write
,
2149 struct mem_attrib
*attrib
, struct target_ops
*target
)
2151 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
2158 /* PMON targets do not cope well with 64 bit addresses. Mask the
2159 value down to 32 bits. */
2161 memaddr
&= (CORE_ADDR
) 0xffffffff;
2163 /* Round starting address down to longword boundary. */
2164 addr
= memaddr
& ~3;
2165 /* Round ending address up; get number of longwords that makes. */
2166 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2167 /* Allocate buffer of that many longwords. */
2168 buffer
= alloca (count
* 4);
2172 /* Fill start and end extra bytes of buffer with existing data. */
2173 if (addr
!= memaddr
|| len
< 4)
2177 if (mips_fetch_word (addr
, &val
))
2180 /* Need part of initial word -- fetch it. */
2181 store_unsigned_integer (&buffer
[0], 4, byte_order
, val
);
2188 /* Need part of last word -- fetch it. FIXME: we do this even
2189 if we don't need it. */
2190 if (mips_fetch_word (addr
+ (count
- 1) * 4, &val
))
2193 store_unsigned_integer (&buffer
[(count
- 1) * 4],
2194 4, byte_order
, val
);
2197 /* Copy data to be written over corresponding part of buffer. */
2199 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2201 /* Write the entire buffer. */
2203 for (i
= 0; i
< count
; i
++, addr
+= 4)
2207 word
= extract_unsigned_integer (&buffer
[i
* 4], 4, byte_order
);
2208 status
= mips_store_word (addr
, word
, NULL
);
2209 /* Report each kilobyte (we download 32-bit words at a time). */
2212 printf_unfiltered ("*");
2213 gdb_flush (gdb_stdout
);
2220 /* FIXME: Do we want a QUIT here? */
2223 printf_unfiltered ("\n");
2227 /* Read all the longwords. */
2228 for (i
= 0; i
< count
; i
++, addr
+= 4)
2232 if (mips_fetch_word (addr
, &val
))
2235 store_unsigned_integer (&buffer
[i
* 4], 4, byte_order
, val
);
2239 /* Copy appropriate bytes out of the buffer. */
2240 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2245 /* Print info on this target. */
2248 mips_files_info (struct target_ops
*ignore
)
2250 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2253 /* Kill the process running on the board. This will actually only
2254 work if we are doing remote debugging over the console input. I
2255 think that if IDT/sim had the remote debug interrupt enabled on the
2256 right port, we could interrupt the process with a break signal. */
2259 mips_kill (struct target_ops
*ops
)
2261 if (!mips_wait_flag
)
2263 target_mourn_inferior ();
2269 if (interrupt_count
>= 2)
2271 interrupt_count
= 0;
2273 target_terminal_ours ();
2275 if (query (_("Interrupted while waiting for the program.\n\
2276 Give up (and stop debugging it)? ")))
2278 /* Clean up in such a way that mips_close won't try to talk
2279 to the board (it almost surely won't work since we
2280 weren't able to talk to it). */
2284 printf_unfiltered ("Ending remote MIPS debugging.\n");
2285 target_mourn_inferior ();
2287 deprecated_throw_reason (RETURN_QUIT
);
2290 target_terminal_inferior ();
2293 if (remote_debug
> 0)
2294 printf_unfiltered ("Sending break\n");
2296 serial_send_break (mips_desc
);
2298 target_mourn_inferior ();
2307 serial_write (mips_desc
, &cc
, 1);
2309 target_mourn_inferior ();
2314 /* Start running on the target board. */
2317 mips_create_inferior (struct target_ops
*ops
, char *execfile
,
2318 char *args
, char **env
, int from_tty
)
2325 Can't pass arguments to remote MIPS board; arguments ignored."));
2326 /* And don't try to use them on the next "run" command. */
2327 execute_command ("set args", 0);
2330 if (execfile
== 0 || exec_bfd
== 0)
2331 error (_("No executable file specified"));
2333 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2335 init_wait_for_inferior ();
2337 regcache_write_pc (get_current_regcache (), entry_pt
);
2340 /* Clean up after a process. The bulk of the work is done in mips_close(),
2341 which is called when unpushing the target. */
2344 mips_mourn_inferior (struct target_ops
*ops
)
2346 if (current_ops
!= NULL
)
2347 unpush_target (current_ops
);
2350 /* We can write a breakpoint and read the shadow contents in one
2353 /* Insert a breakpoint. On targets that don't have built-in
2354 breakpoint support, we read the contents of the target location and
2355 stash it, then overwrite it with a breakpoint instruction. ADDR is
2356 the target location in the target machine. BPT is the breakpoint
2357 being inserted or removed, which contains memory for saving the
2361 mips_insert_breakpoint (struct gdbarch
*gdbarch
,
2362 struct bp_target_info
*bp_tgt
)
2364 if (monitor_supports_breakpoints
)
2365 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2368 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
2371 /* Remove a breakpoint. */
2374 mips_remove_breakpoint (struct gdbarch
*gdbarch
,
2375 struct bp_target_info
*bp_tgt
)
2377 if (monitor_supports_breakpoints
)
2378 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2381 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
2384 /* Tell whether this target can support a hardware breakpoint. CNT
2385 is the number of hardware breakpoints already installed. This
2386 implements the target_can_use_hardware_watchpoint macro. */
2389 mips_can_use_watchpoint (int type
, int cnt
, int othertype
)
2391 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2395 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2396 This is used for memory ref breakpoints. */
2398 static unsigned long
2399 calculate_mask (CORE_ADDR addr
, int len
)
2404 mask
= addr
^ (addr
+ len
- 1);
2406 for (i
= 32; i
>= 0; i
--)
2412 mask
= (unsigned long) 0xffffffff >> i
;
2418 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2419 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2423 mips_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
2424 struct expression
*cond
)
2426 if (mips_set_breakpoint (addr
, len
, type
))
2432 /* Remove a watchpoint. */
2435 mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
2436 struct expression
*cond
)
2438 if (mips_clear_breakpoint (addr
, len
, type
))
2444 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2448 mips_stopped_by_watchpoint (void)
2450 return hit_watchpoint
;
2454 /* Insert a breakpoint. */
2457 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2459 return mips_common_breakpoint (1, addr
, len
, type
);
2463 /* Clear a breakpoint. */
2466 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2468 return mips_common_breakpoint (0, addr
, len
, type
);
2472 /* Check the error code from the return packet for an LSI breakpoint
2473 command. If there's no error, just return 0. If it's a warning,
2474 print the warning text and return 0. If it's an error, print
2475 the error text and return 1. <ADDR> is the address of the breakpoint
2476 that was being set. <RERRFLG> is the error code returned by PMON.
2477 This is a helper function for mips_common_breakpoint. */
2480 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2482 struct lsi_error
*err
;
2483 const char *saddr
= paddress (target_gdbarch
, addr
);
2485 if (rerrflg
== 0) /* no error */
2488 /* Warnings can be ORed together, so check them all. */
2489 if (rerrflg
& W_WARN
)
2491 if (monitor_warnings
)
2495 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2497 if ((err
->code
& rerrflg
) == err
->code
)
2500 fprintf_unfiltered (gdb_stderr
, "\
2501 mips_common_breakpoint (%s): Warning: %s\n",
2507 fprintf_unfiltered (gdb_stderr
, "\
2508 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2515 /* Errors are unique, i.e. can't be ORed together. */
2516 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2518 if ((err
->code
& rerrflg
) == err
->code
)
2520 fprintf_unfiltered (gdb_stderr
, "\
2521 mips_common_breakpoint (%s): Error: %s\n",
2527 fprintf_unfiltered (gdb_stderr
, "\
2528 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2535 /* This routine sends a breakpoint command to the remote target.
2537 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2538 <ADDR> is the address of the breakpoint.
2539 <LEN> the length of the region to break on.
2540 <TYPE> is the type of breakpoint:
2541 0 = write (BREAK_WRITE)
2542 1 = read (BREAK_READ)
2543 2 = read/write (BREAK_ACCESS)
2544 3 = instruction fetch (BREAK_FETCH)
2546 Return 0 if successful; otherwise 1. */
2549 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2551 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2552 char buf
[DATA_MAXLEN
+ 1];
2554 int rpid
, rerrflg
, rresponse
, rlen
;
2557 addr
= gdbarch_addr_bits_remove (target_gdbarch
, addr
);
2559 if (mips_monitor
== MON_LSI
)
2561 if (set
== 0) /* clear breakpoint */
2563 /* The LSI PMON "clear breakpoint" has this form:
2564 <pid> 'b' <bptn> 0x0
2566 <pid> 'b' 0x0 <code>
2568 <bptn> is a breakpoint number returned by an earlier 'B' command.
2569 Possible return codes: OK, E_BPT. */
2573 /* Search for the breakpoint in the table. */
2574 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2575 if (lsi_breakpoints
[i
].type
== type
2576 && lsi_breakpoints
[i
].addr
== addr
2577 && lsi_breakpoints
[i
].len
== len
)
2580 /* Clear the table entry and tell PMON to clear the breakpoint. */
2581 if (i
== MAX_LSI_BREAKPOINTS
)
2584 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2585 paddress (target_gdbarch
, addr
));
2589 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2590 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2591 mips_send_packet (buf
, 1);
2593 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2596 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2598 mips_error (_("mips_common_breakpoint: "
2599 "Bad response from remote board: %s"),
2602 return (mips_check_lsi_error (addr
, rerrflg
));
2605 /* set a breakpoint */
2607 /* The LSI PMON "set breakpoint" command has this form:
2608 <pid> 'B' <addr> 0x0
2610 <pid> 'B' <bptn> <code>
2612 The "set data breakpoint" command has this form:
2614 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2616 where: type= "0x1" = read
2618 "0x3" = access (read or write)
2620 The reply returns two values:
2621 bptn - a breakpoint number, which is a small integer with
2622 possible values of zero through 255.
2623 code - an error return code, a value of zero indicates a
2624 succesful completion, other values indicate various
2625 errors and warnings.
2627 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2629 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2632 sprintf (buf
, "0x0 B 0x%s 0x0", phex_nz (addr
, addr_size
));
2638 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s",
2639 phex_nz (addr
, addr_size
),
2640 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2641 phex_nz (addr
+ len
- 1, addr_size
));
2643 mips_send_packet (buf
, 1);
2645 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2648 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2649 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2650 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2651 mips_error (_("mips_common_breakpoint: "
2652 "Bad response from remote board: %s"),
2656 if (mips_check_lsi_error (addr
, rerrflg
))
2659 /* rresponse contains PMON's breakpoint number. Record the
2660 information for this breakpoint so we can clear it later. */
2661 lsi_breakpoints
[rresponse
].type
= type
;
2662 lsi_breakpoints
[rresponse
].addr
= addr
;
2663 lsi_breakpoints
[rresponse
].len
= len
;
2670 /* On non-LSI targets, the breakpoint command has this form:
2671 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2672 <MASK> is a don't care mask for addresses.
2673 <FLAGS> is any combination of `r', `w', or `f' for
2674 read/write/fetch. */
2678 mask
= calculate_mask (addr
, len
);
2681 if (set
) /* set a breakpoint */
2687 case BREAK_WRITE
: /* write */
2690 case BREAK_READ
: /* read */
2693 case BREAK_ACCESS
: /* read/write */
2696 case BREAK_FETCH
: /* fetch */
2700 internal_error (__FILE__
, __LINE__
,
2701 _("failed internal consistency check"));
2705 sprintf (buf
, "0x0 B 0x%s 0x%s %s", phex_nz (addr
, addr_size
),
2706 phex_nz (mask
, addr_size
), flags
);
2711 sprintf (buf
, "0x0 b 0x%s", phex_nz (addr
, addr_size
));
2714 mips_send_packet (buf
, 1);
2716 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2719 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2720 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2722 if (nfields
!= 4 || rcmd
!= cmd
)
2723 mips_error (_("mips_common_breakpoint: "
2724 "Bad response from remote board: %s"),
2729 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2730 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2731 if (mips_monitor
== MON_DDB
)
2732 rresponse
= rerrflg
;
2733 if (rresponse
!= 22) /* invalid argument */
2734 fprintf_unfiltered (gdb_stderr
, "\
2735 mips_common_breakpoint (%s): Got error: 0x%x\n",
2736 paddress (target_gdbarch
, addr
), rresponse
);
2743 /* Send one S record as specified by SREC of length LEN, starting
2744 at ADDR. Note, however, that ADDR is not used except to provide
2745 a useful message to the user in the event that a NACK is received
2749 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2755 serial_write (mips_desc
, srec
, len
);
2757 ch
= mips_readchar (remote_timeout
);
2761 case SERIAL_TIMEOUT
:
2762 error (_("Timeout during download."));
2766 case 0x15: /* NACK */
2767 fprintf_unfiltered (gdb_stderr
,
2768 "Download got a NACK at byte %s! Retrying.\n",
2769 paddress (target_gdbarch
, addr
));
2772 error (_("Download got unexpected ack char: 0x%x, retrying."),
2778 /* Download a binary file by converting it to S records. */
2781 mips_load_srec (char *args
)
2785 char *buffer
, srec
[1024];
2787 unsigned int srec_frame
= 200;
2789 static int hashmark
= 1;
2791 buffer
= alloca (srec_frame
* 2 + 256);
2793 abfd
= bfd_openr (args
, 0);
2796 printf_filtered ("Unable to open file %s\n", args
);
2800 if (bfd_check_format (abfd
, bfd_object
) == 0)
2802 printf_filtered ("File is not an object file\n");
2806 /* This actually causes a download in the IDT binary format: */
2807 mips_send_command (LOAD_CMD
, 0);
2809 for (s
= abfd
->sections
; s
; s
= s
->next
)
2811 if (s
->flags
& SEC_LOAD
)
2813 unsigned int numbytes
;
2815 /* FIXME! vma too small????? */
2816 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2818 (long) (s
->vma
+ bfd_get_section_size (s
)));
2819 gdb_flush (gdb_stdout
);
2821 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2823 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2825 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2827 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2829 send_srec (srec
, reclen
, s
->vma
+ i
);
2831 if (deprecated_ui_load_progress_hook
)
2832 deprecated_ui_load_progress_hook (s
->name
, i
);
2836 putchar_unfiltered ('#');
2837 gdb_flush (gdb_stdout
);
2840 } /* Per-packet (or S-record) loop */
2842 putchar_unfiltered ('\n');
2843 } /* Loadable sections */
2846 putchar_unfiltered ('\n');
2848 /* Write a type 7 terminator record. no data for a type 7, and there
2849 is no data, so len is 0. */
2851 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2853 send_srec (srec
, reclen
, abfd
->start_address
);
2855 serial_flush_input (mips_desc
);
2859 * mips_make_srec -- make an srecord. This writes each line, one at a
2860 * time, each with it's own header and trailer line.
2861 * An srecord looks like this:
2863 * byte count-+ address
2864 * start ---+ | | data +- checksum
2866 * S01000006F6B692D746573742E73726563E4
2867 * S315000448600000000000000000FC00005900000000E9
2868 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2869 * S30B0004485A0000000000004E
2872 * S<type><length><address><data><checksum>
2876 * is the number of bytes following upto the checksum. Note that
2877 * this is not the number of chars following, since it takes two
2878 * chars to represent a byte.
2882 * 1) two byte address data record
2883 * 2) three byte address data record
2884 * 3) four byte address data record
2885 * 7) four byte address termination record
2886 * 8) three byte address termination record
2887 * 9) two byte address termination record
2890 * is the start address of the data following, or in the case of
2891 * a termination record, the start address of the image
2895 * is the sum of all the raw byte data in the record, from the length
2896 * upwards, modulo 256 and subtracted from 255.
2898 * This routine returns the length of the S-record.
2903 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2906 unsigned char checksum
;
2909 /* Create the header for the srec. addr_size is the number of bytes
2910 in the address, and 1 is the number of bytes in the count. */
2912 /* FIXME!! bigger buf required for 64-bit! */
2915 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2916 /* This assumes S3 style downloads (4byte addresses). There should
2917 probably be a check, or the code changed to make it more
2919 buf
[3] = memaddr
>> 24;
2920 buf
[4] = memaddr
>> 16;
2921 buf
[5] = memaddr
>> 8;
2923 memcpy (&buf
[7], myaddr
, len
);
2925 /* Note that the checksum is calculated on the raw data, not the
2926 hexified data. It includes the length, address and the data
2927 portions of the packet. */
2929 buf
+= 2; /* Point at length byte. */
2930 for (i
= 0; i
< len
+ 4 + 1; i
++)
2938 /* The following manifest controls whether we enable the simple flow
2939 control support provided by the monitor. If enabled the code will
2940 wait for an affirmative ACK between transmitting packets. */
2941 #define DOETXACK (1)
2943 /* The PMON fast-download uses an encoded packet format constructed of
2944 3byte data packets (encoded as 4 printable ASCII characters), and
2945 escape sequences (preceded by a '/'):
2948 'C' compare checksum (12bit value, not included in checksum calculation)
2949 'S' define symbol name (for addr) terminated with ","
2950 and padded to 4char boundary
2951 'Z' zero fill multiple of 3bytes
2952 'B' byte (12bit encoded value, of 8bit data)
2953 'A' address (36bit encoded value)
2954 'E' define entry as original address, and exit load
2956 The packets are processed in 4 character chunks, so the escape
2957 sequences that do not have any data (or variable length data)
2958 should be padded to a 4 character boundary. The decoder will give
2959 an error if the complete message block size is not a multiple of
2960 4bytes (size of record).
2962 The encoding of numbers is done in 6bit fields. The 6bit value is
2963 used to index into this string to get the specific character
2964 encoding for the value: */
2965 static char encoding
[] =
2966 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2968 /* Convert the number of bits required into an encoded number, 6bits
2969 at a time (range 0..63). Keep a checksum if required (passed
2970 pointer non-NULL). The function returns the number of encoded
2971 characters written into the buffer. */
2974 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2976 int count
= (n
/ 6);
2980 fprintf_unfiltered (gdb_stderr
,
2981 "Fast encoding bitcount must be a "
2982 "multiple of 12bits: %dbit%s\n",
2983 n
, (n
== 1) ? "" : "s");
2988 fprintf_unfiltered (gdb_stderr
,
2989 "Fast encoding cannot process more "
2990 "than 36bits at the moment: %dbits\n", n
);
2994 /* Deal with the checksum: */
3000 *chksum
+= ((v
>> 24) & 0xFFF);
3002 *chksum
+= ((v
>> 12) & 0xFFF);
3004 *chksum
+= ((v
>> 0) & 0xFFF);
3011 *p
++ = encoding
[(v
>> n
) & 0x3F];
3018 /* Shorthand function (that could be in-lined) to output the zero-fill
3019 escape sequence into the data stream. */
3022 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
3026 sprintf (*buff
, "/Z");
3027 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3028 *buff
+= (count
+ 2);
3030 return (recsize
+ count
+ 2);
3033 /* Add the checksum specified by *VALUE to end of the record under
3034 construction. *BUF specifies the location at which to begin
3035 writing characters comprising the checksum information. RECSIZE
3036 specifies the size of the record constructed thus far. (A trailing
3037 NUL character may be present in the buffer holding the record, but
3038 the record size does not include this character.)
3040 Return the total size of the record after adding the checksum escape,
3041 the checksum itself, and the trailing newline.
3043 The checksum specified by *VALUE is zeroed out prior to returning.
3044 Additionally, *BUF is updated to refer to the location just beyond
3045 the record elements added by this call. */
3048 pmon_checkset (int recsize
, char **buff
, int *value
)
3052 /* Add the checksum (without updating the value): */
3053 sprintf (*buff
, "/C");
3054 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3055 *buff
+= (count
+ 2);
3056 sprintf (*buff
, "\n");
3057 *buff
+= 2; /* Include zero terminator. */
3058 /* Forcing a checksum validation clears the sum: */
3060 return (recsize
+ count
+ 3);
3063 /* Amount of padding we leave after at the end of the output buffer,
3064 for the checksum and line termination characters: */
3065 #define CHECKSIZE (4 + 4 + 4 + 2)
3066 /* zero-fill, checksum, transfer end and line termination space. */
3068 /* The amount of binary data loaded from the object file in a single
3070 #define BINCHUNK (1024)
3072 /* Maximum line of data accepted by the monitor: */
3073 #define MAXRECSIZE (550)
3074 /* NOTE: This constant depends on the monitor being used. This value
3075 is for PMON 5.x on the Cogent Vr4300 board. */
3077 /* Create a FastLoad format record.
3079 *OUTBUF is the buffer into which a FastLoad formatted record is
3080 written. On return, the pointer position represented by *OUTBUF
3081 is updated to point at the end of the data, i.e. the next position
3082 in the buffer that may be written. No attempt is made to NUL-
3083 terminate this portion of the record written to the buffer.
3085 INBUF contains the binary input data from which the FastLoad
3086 formatted record will be built. *INPTR is an index into this
3087 buffer. *INPTR is updated as the input is consumed. Thus, on
3088 return, the caller has access to the position of the next input
3089 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3092 *RECSIZE will be written with the size of the record written to the
3093 output buffer prior to returning. This size does not include a
3094 NUL-termination byte as none is written to the output buffer.
3096 *CSUM is the output buffer checksum. It is updated as data is
3097 written to the output buffer.
3099 *ZEROFILL is the current number of 3-byte zero sequences that have
3100 been encountered. It is both an input and an output to this
3104 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3105 int inamount
, int *recsize
, unsigned int *csum
,
3106 unsigned int *zerofill
)
3111 /* This is a simple check to ensure that our data will fit within
3112 the maximum allowable record size. Each record output is 4bytes
3113 in length. We must allow space for a pending zero fill command,
3114 the record, and a checksum record. */
3115 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3117 /* Process the binary data: */
3118 if ((inamount
- *inptr
) < 3)
3121 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3123 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3125 *recsize
+= (2 + count
);
3130 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16)
3131 | (inbuf
[*inptr
+ 1] << 8)
3132 | (inbuf
[*inptr
+ 2]));
3134 /* Simple check for zero data. TODO: A better check would be
3135 to check the last, and then the middle byte for being zero
3136 (if the first byte is not). We could then check for
3137 following runs of zeros, and if above a certain size it is
3138 worth the 4 or 8 character hit of the byte insertions used
3139 to pad to the start of the zeroes. NOTE: This also depends
3140 on the alignment at the end of the zero run. */
3141 if (value
== 0x00000000)
3144 if (*zerofill
== 0xFFF) /* 12bit counter */
3145 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3150 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3151 count
= pmon_makeb64 (value
, p
, 24, csum
);
3163 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3164 output the message specified by MESG. Return -1 for failure, 0
3168 pmon_check_ack (char *mesg
)
3170 #if defined(DOETXACK)
3175 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
3177 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3179 fprintf_unfiltered (gdb_stderr
,
3180 "Failed to receive valid ACK for %s\n", mesg
);
3181 return (-1); /* Terminate the download. */
3184 #endif /* DOETXACK */
3188 /* pmon_download - Send a sequence of characters to the PMON download port,
3189 which is either a serial port or a UDP socket. */
3192 pmon_start_download (void)
3196 /* Create the temporary download file. */
3197 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3198 perror_with_name (tftp_localname
);
3202 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3203 mips_expect ("Downloading from ");
3204 mips_expect (udp_in_use
? "udp" : "tty0");
3205 mips_expect (", ^C to abort\r\n");
3209 /* Look for the string specified by STRING sent from the target board
3210 during a download operation. If the string in question is not
3211 seen, output an error message, remove the temporary file, if
3212 appropriate, and return 0. Otherwise, return 1 to indicate
3216 mips_expect_download (char *string
)
3218 if (!mips_expect (string
))
3220 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3222 remove (tftp_localname
); /* Remove temporary file. */
3229 /* Look for messages from the target board associated with the entry
3232 NOTE: This function doesn't indicate success or failure, so we
3233 have no way to determine whether or not the output from the board
3234 was correctly seen. However, given that other items are checked
3235 after this, it seems unlikely that those checks will pass if this
3236 check doesn't first (silently) pass. */
3239 pmon_check_entry_address (char *entry_address
, int final
)
3241 char hexnumber
[9]; /* Includes '\0' space. */
3243 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3244 sprintf (hexnumber
, "%x", final
);
3245 mips_expect (hexnumber
);
3246 mips_expect ("\r\n");
3249 /* Look for messages from the target board showing the total number of
3250 bytes downloaded to the board. Output 1 for success if the tail
3251 end of the message was read correctly, 0 otherwise. */
3254 pmon_check_total (int bintotal
)
3256 char hexnumber
[9]; /* Includes '\0' space. */
3258 mips_expect ("\r\ntotal = 0x");
3259 sprintf (hexnumber
, "%x", bintotal
);
3260 mips_expect (hexnumber
);
3261 return mips_expect_download (" bytes\r\n");
3264 /* Look for the termination messages associated with the end of
3265 a download to the board.
3267 Also, when `tftp_in_use' is set, issue the load command to the
3268 board causing the file to be transferred. (This is done prior
3269 to looking for the above mentioned termination messages.) */
3272 pmon_end_download (int final
, int bintotal
)
3274 char hexnumber
[9]; /* Includes '\0' space. */
3278 static char *load_cmd_prefix
= "load -b -s ";
3282 /* Close off the temporary file containing the load data. */
3286 /* Make the temporary file readable by the world. */
3287 if (stat (tftp_localname
, &stbuf
) == 0)
3288 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3290 /* Must reinitialize the board to prevent PMON from crashing. */
3291 if (mips_monitor
!= MON_ROCKHOPPER
)
3292 mips_send_command ("initEther\r", -1);
3294 /* Send the load command. */
3295 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3296 strcpy (cmd
, load_cmd_prefix
);
3297 strcat (cmd
, tftp_name
);
3299 mips_send_command (cmd
, 0);
3301 if (!mips_expect_download ("Downloading from "))
3303 if (!mips_expect_download (tftp_name
))
3305 if (!mips_expect_download (", ^C to abort\r\n"))
3309 /* Wait for the stuff that PMON prints after the load has completed.
3310 The timeout value for use in the tftp case (15 seconds) was picked
3311 arbitrarily but might be too small for really large downloads. FIXME. */
3312 switch (mips_monitor
)
3315 pmon_check_ack ("termination");
3316 pmon_check_entry_address ("Entry address is ", final
);
3317 if (!pmon_check_total (bintotal
))
3320 case MON_ROCKHOPPER
:
3321 if (!pmon_check_total (bintotal
))
3323 pmon_check_entry_address ("Entry Address = ", final
);
3326 pmon_check_entry_address ("Entry Address = ", final
);
3327 pmon_check_ack ("termination");
3328 if (!pmon_check_total (bintotal
))
3334 remove (tftp_localname
); /* Remove temporary file. */
3337 /* Write the buffer specified by BUFFER of length LENGTH to either
3338 the board or the temporary file that'll eventually be transferred
3342 pmon_download (char *buffer
, int length
)
3345 fwrite (buffer
, 1, length
, tftp_file
);
3347 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3350 /* Open object or executable file, FILE, and send it to the board
3351 using the FastLoad format. */
3354 pmon_load_fast (char *file
)
3358 unsigned char *binbuf
;
3361 unsigned int csum
= 0;
3362 int hashmark
= !tftp_in_use
;
3367 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3368 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3370 abfd
= bfd_openr (file
, 0);
3373 printf_filtered ("Unable to open file %s\n", file
);
3377 if (bfd_check_format (abfd
, bfd_object
) == 0)
3379 printf_filtered ("File is not an object file\n");
3383 /* Setup the required download state: */
3384 mips_send_command ("set dlproto etxack\r", -1);
3385 mips_send_command ("set dlecho off\r", -1);
3386 /* NOTE: We get a "cannot set variable" message if the variable is
3387 already defined to have the argument we give. The code doesn't
3388 care, since it just scans to the next prompt anyway. */
3389 /* Start the download: */
3390 pmon_start_download ();
3392 /* Zero the checksum. */
3393 sprintf (buffer
, "/Kxx\n");
3394 reclen
= strlen (buffer
);
3395 pmon_download (buffer
, reclen
);
3396 finished
= pmon_check_ack ("/Kxx");
3398 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3399 if (s
->flags
& SEC_LOAD
) /* Only deal with loadable sections. */
3401 bintotal
+= bfd_get_section_size (s
);
3402 final
= (s
->vma
+ bfd_get_section_size (s
));
3404 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
,
3405 (unsigned int) s
->vma
,
3406 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3407 gdb_flush (gdb_stdout
);
3409 /* Output the starting address. */
3410 sprintf (buffer
, "/A");
3411 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3412 buffer
[2 + reclen
] = '\n';
3413 buffer
[3 + reclen
] = '\0';
3414 reclen
+= 3; /* For the initial escape code and carriage return. */
3415 pmon_download (buffer
, reclen
);
3416 finished
= pmon_check_ack ("/A");
3420 unsigned int binamount
;
3421 unsigned int zerofill
= 0;
3428 i
< bfd_get_section_size (s
) && !finished
;
3433 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3435 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3437 /* This keeps a rolling checksum, until we decide to output
3439 for (; ((binamount
- binptr
) > 0);)
3441 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3442 &reclen
, &csum
, &zerofill
);
3443 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3445 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3446 pmon_download (buffer
, reclen
);
3447 finished
= pmon_check_ack ("data record");
3450 zerofill
= 0; /* Do not transmit pending
3455 if (deprecated_ui_load_progress_hook
)
3456 deprecated_ui_load_progress_hook (s
->name
, i
);
3460 putchar_unfiltered ('#');
3461 gdb_flush (gdb_stdout
);
3465 reclen
= 0; /* buffer processed */
3470 /* Ensure no out-standing zerofill requests: */
3472 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3474 /* and then flush the line: */
3477 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3478 /* Currently pmon_checkset outputs the line terminator by
3479 default, so we write out the buffer so far: */
3480 pmon_download (buffer
, reclen
);
3481 finished
= pmon_check_ack ("record remnant");
3485 putchar_unfiltered ('\n');
3488 /* Terminate the transfer. We know that we have an empty output
3489 buffer at this point. */
3490 sprintf (buffer
, "/E/E\n"); /* Include dummy padding characters. */
3491 reclen
= strlen (buffer
);
3492 pmon_download (buffer
, reclen
);
3495 { /* Ignore the termination message: */
3496 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3499 { /* Deal with termination message: */
3500 pmon_end_download (final
, bintotal
);
3506 /* mips_load -- download a file. */
3509 mips_load (char *file
, int from_tty
)
3511 struct regcache
*regcache
;
3513 /* Get the board out of remote debugging mode. */
3514 if (mips_exit_debug ())
3515 error (_("mips_load: Couldn't get into monitor mode."));
3517 if (mips_monitor
!= MON_IDT
)
3518 pmon_load_fast (file
);
3520 mips_load_srec (file
);
3524 /* Finally, make the PC point at the start address. */
3525 regcache
= get_current_regcache ();
3526 if (mips_monitor
!= MON_IDT
)
3528 /* Work around problem where PMON monitor updates the PC after a load
3529 to a different value than GDB thinks it has. The following ensures
3530 that the regcache_write_pc() WILL update the PC value: */
3531 regcache_invalidate (regcache
,
3532 mips_regnum (get_regcache_arch (regcache
))->pc
);
3535 regcache_write_pc (regcache
, bfd_get_start_address (exec_bfd
));
3538 /* Check to see if a thread is still alive. */
3541 mips_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
3543 if (ptid_equal (ptid
, remote_mips_ptid
))
3544 /* The monitor's task is always alive. */
3550 /* Convert a thread ID to a string. Returns the string in a static
3554 mips_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3556 static char buf
[64];
3558 if (ptid_equal (ptid
, remote_mips_ptid
))
3560 xsnprintf (buf
, sizeof buf
, "Thread <main>");
3564 return normal_pid_to_str (ptid
);
3567 /* Pass the command argument as a packet to PMON verbatim. */
3570 pmon_command (char *args
, int from_tty
)
3572 char buf
[DATA_MAXLEN
+ 1];
3575 sprintf (buf
, "0x0 %s", args
);
3576 mips_send_packet (buf
, 1);
3577 printf_filtered ("Send packet: %s\n", buf
);
3579 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3581 printf_filtered ("Received packet: %s\n", buf
);
3584 /* -Wmissing-prototypes */
3585 extern initialize_file_ftype _initialize_remote_mips
;
3587 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3588 Create target specific commands and perform other initializations
3589 specific to this file. */
3592 _initialize_remote_mips (void)
3594 /* Initialize the fields in mips_ops that are common to all four targets. */
3595 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3596 mips_ops
.to_close
= mips_close
;
3597 mips_ops
.to_detach
= mips_detach
;
3598 mips_ops
.to_resume
= mips_resume
;
3599 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3600 mips_ops
.to_store_registers
= mips_store_registers
;
3601 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3602 mips_ops
.deprecated_xfer_memory
= mips_xfer_memory
;
3603 mips_ops
.to_files_info
= mips_files_info
;
3604 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3605 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3606 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3607 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3608 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3609 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3610 mips_ops
.to_kill
= mips_kill
;
3611 mips_ops
.to_load
= mips_load
;
3612 mips_ops
.to_create_inferior
= mips_create_inferior
;
3613 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3614 mips_ops
.to_thread_alive
= mips_thread_alive
;
3615 mips_ops
.to_pid_to_str
= mips_pid_to_str
;
3616 mips_ops
.to_log_command
= serial_log_command
;
3617 mips_ops
.to_stratum
= process_stratum
;
3618 mips_ops
.to_has_all_memory
= default_child_has_all_memory
;
3619 mips_ops
.to_has_memory
= default_child_has_memory
;
3620 mips_ops
.to_has_stack
= default_child_has_stack
;
3621 mips_ops
.to_has_registers
= default_child_has_registers
;
3622 mips_ops
.to_has_execution
= default_child_has_execution
;
3623 mips_ops
.to_magic
= OPS_MAGIC
;
3625 /* Copy the common fields to all four target vectors. */
3626 rockhopper_ops
= pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3628 /* Initialize target-specific fields in the target vectors. */
3629 mips_ops
.to_shortname
= "mips";
3630 mips_ops
.to_doc
= "\
3631 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3632 The argument is the device it is connected to or, if it contains a colon,\n\
3633 HOST:PORT to access a board over a network";
3634 mips_ops
.to_open
= mips_open
;
3635 mips_ops
.to_wait
= mips_wait
;
3637 pmon_ops
.to_shortname
= "pmon";
3638 pmon_ops
.to_doc
= "\
3639 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3640 line. The argument is the device it is connected to or, if it contains a\n\
3641 colon, HOST:PORT to access a board over a network";
3642 pmon_ops
.to_open
= pmon_open
;
3643 pmon_ops
.to_wait
= mips_wait
;
3645 ddb_ops
.to_shortname
= "ddb";
3647 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3648 line. The first argument is the device it is connected to or, if it contains\n\
3649 a colon, HOST:PORT to access a board over a network. The optional second\n\
3650 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3651 TFTP downloads to the board. The optional third parameter is the local name\n\
3652 of the TFTP temporary file, if it differs from the filename seen by the board.";
3653 ddb_ops
.to_open
= ddb_open
;
3654 ddb_ops
.to_wait
= mips_wait
;
3656 rockhopper_ops
.to_shortname
= "rockhopper";
3657 rockhopper_ops
.to_doc
= ddb_ops
.to_doc
;
3658 rockhopper_ops
.to_open
= rockhopper_open
;
3659 rockhopper_ops
.to_wait
= mips_wait
;
3661 lsi_ops
.to_shortname
= "lsi";
3662 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3663 lsi_ops
.to_open
= lsi_open
;
3664 lsi_ops
.to_wait
= mips_wait
;
3666 /* Add the targets. */
3667 add_target (&mips_ops
);
3668 add_target (&pmon_ops
);
3669 add_target (&ddb_ops
);
3670 add_target (&lsi_ops
);
3671 add_target (&rockhopper_ops
);
3673 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3674 Set timeout in seconds for remote MIPS serial I/O."), _("\
3675 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3677 NULL
, /* FIXME: i18n: */
3678 &setlist
, &showlist
);
3680 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3681 &mips_retransmit_wait
, _("\
3682 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3683 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3684 This is the number of seconds to wait for an acknowledgement to a packet\n\
3685 before resending the packet."),
3687 NULL
, /* FIXME: i18n: */
3688 &setlist
, &showlist
);
3690 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3691 &mips_syn_garbage
, _("\
3692 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3693 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3694 This is the maximum number of characters GDB will ignore when trying to\n\
3695 synchronize with the remote system. A value of -1 means that there is no\n\
3696 limit. (Note that these characters are printed out even though they are\n\
3699 NULL
, /* FIXME: i18n: */
3700 &setlist
, &showlist
);
3702 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3703 &mips_monitor_prompt
, _("\
3704 Set the prompt that GDB expects from the monitor."), _("\
3705 Show the prompt that GDB expects from the monitor."), NULL
,
3707 NULL
, /* FIXME: i18n: */
3708 &setlist
, &showlist
);
3710 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3711 &monitor_warnings
, _("\
3712 Set printing of monitor warnings."), _("\
3713 Show printing of monitor warnings."), _("\
3714 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3716 NULL
, /* FIXME: i18n: */
3717 &setlist
, &showlist
);
3719 add_com ("pmon", class_obscure
, pmon_command
,
3720 _("Send a packet to PMON (must be in debug mode)."));
3722 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3723 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3724 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3725 Use \"on\" to enable the masking and \"off\" to disable it."),
3727 NULL
, /* FIXME: i18n: */
3728 &setlist
, &showlist
);
3729 remote_mips_ptid
= ptid_build (42000, 0, 42000);