1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
31 #include "remote-utils.h"
32 #include "gdb_string.h"
34 #include <sys/types.h>
38 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
40 #define S_IROTH S_IREAD
45 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
46 types passed by breakpoint.c to target_insert_watchpoint.
47 Value 3 is our own invention, and is used for ordinary instruction
48 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
58 /* Prototypes for local functions. */
60 static int mips_readchar (int timeout
);
62 static int mips_receive_header (unsigned char *hdr
, int *pgarbage
,
65 static int mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
66 int *pch
, int timeout
);
68 static int mips_cksum (const unsigned char *hdr
,
69 const unsigned char *data
, int len
);
71 static void mips_send_packet (const char *s
, int get_ack
);
73 static void mips_send_command (const char *cmd
, int prompt
);
75 static int mips_receive_packet (char *buff
, int throw_error
, int timeout
);
77 static ULONGEST
mips_request (int cmd
, ULONGEST addr
, ULONGEST data
,
78 int *perr
, int timeout
, char *buff
);
80 static void mips_initialize (void);
82 static void mips_open (char *name
, int from_tty
);
84 static void pmon_open (char *name
, int from_tty
);
86 static void ddb_open (char *name
, int from_tty
);
88 static void lsi_open (char *name
, int from_tty
);
90 static void mips_close (int quitting
);
92 static void mips_detach (char *args
, int from_tty
);
94 static void mips_resume (int pid
, int step
, enum target_signal siggnal
);
96 static int mips_wait (int pid
, struct target_waitstatus
*status
);
98 static int mips_map_regno (int regno
);
100 static void mips_fetch_registers (int regno
);
102 static void mips_prepare_to_store (void);
104 static void mips_store_registers (int regno
);
106 static unsigned int mips_fetch_word (CORE_ADDR addr
);
108 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
111 static int mips_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
,
113 struct mem_attrib
*attrib
,
114 struct target_ops
*target
);
116 static void mips_files_info (struct target_ops
*ignore
);
118 static void mips_create_inferior (char *execfile
, char *args
, char **env
);
120 static void mips_mourn_inferior (void);
122 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
);
124 static int pmon_zeroset (int recsize
, char **buff
, int *amount
,
125 unsigned int *chksum
);
127 static int pmon_checkset (int recsize
, char **buff
, int *value
);
129 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
130 int *inptr
, int inamount
, int *recsize
,
131 unsigned int *csum
, unsigned int *zerofill
);
133 static int pmon_check_ack (char *mesg
);
135 static void pmon_start_download (void);
137 static void pmon_end_download (int final
, int bintotal
);
139 static void pmon_download (char *buffer
, int length
);
141 static void pmon_load_fast (char *file
);
143 static void mips_load (char *file
, int from_tty
);
145 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
146 unsigned char *myaddr
, int len
);
148 static int set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
150 static int clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
152 static int common_breakpoint (int set
, CORE_ADDR addr
, int len
,
153 enum break_type type
);
155 /* Forward declarations. */
156 extern struct target_ops mips_ops
;
157 extern struct target_ops pmon_ops
;
158 extern struct target_ops ddb_ops
;
160 /* The MIPS remote debugging interface is built on top of a simple
161 packet protocol. Each packet is organized as follows:
163 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
164 may not appear anywhere else in the packet. Any time a SYN is
165 seen, a new packet should be assumed to have begun.
168 This byte contains the upper five bits of the logical length
169 of the data section, plus a single bit indicating whether this
170 is a data packet or an acknowledgement. The documentation
171 indicates that this bit is 1 for a data packet, but the actual
172 board uses 1 for an acknowledgement. The value of the byte is
173 0x40 + (ack ? 0x20 : 0) + (len >> 6)
174 (we always have 0 <= len < 1024). Acknowledgement packets do
175 not carry data, and must have a data length of 0.
177 LEN1 This byte contains the lower six bits of the logical length of
178 the data section. The value is
181 SEQ This byte contains the six bit sequence number of the packet.
184 An acknowlegment packet contains the sequence number of the
185 packet being acknowledged plus 1 modulo 64. Data packets are
186 transmitted in sequence. There may only be one outstanding
187 unacknowledged data packet at a time. The sequence numbers
188 are independent in each direction. If an acknowledgement for
189 the previous packet is received (i.e., an acknowledgement with
190 the sequence number of the packet just sent) the packet just
191 sent should be retransmitted. If no acknowledgement is
192 received within a timeout period, the packet should be
193 retransmitted. This has an unfortunate failure condition on a
194 high-latency line, as a delayed acknowledgement may lead to an
195 endless series of duplicate packets.
197 DATA The actual data bytes follow. The following characters are
198 escaped inline with DLE (ASCII 020, or ^P):
204 The additional DLE characters are not counted in the logical
205 length stored in the TYPE_LEN and LEN1 bytes.
210 These bytes contain an 18 bit checksum of the complete
211 contents of the packet excluding the SEQ byte and the
212 CSUM[123] bytes. The checksum is simply the twos complement
213 addition of all the bytes treated as unsigned characters. The
214 values of the checksum bytes are:
215 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
216 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
217 CSUM3: 0x40 + (cksum & 0x3f)
219 It happens that the MIPS remote debugging protocol always
220 communicates with ASCII strings. Because of this, this
221 implementation doesn't bother to handle the DLE quoting mechanism,
222 since it will never be required. */
226 /* The SYN character which starts each packet. */
229 /* The 0x40 used to offset each packet (this value ensures that all of
230 the header and trailer bytes, other than SYN, are printable ASCII
232 #define HDR_OFFSET 0x40
234 /* The indices of the bytes in the packet header. */
235 #define HDR_INDX_SYN 0
236 #define HDR_INDX_TYPE_LEN 1
237 #define HDR_INDX_LEN1 2
238 #define HDR_INDX_SEQ 3
241 /* The data/ack bit in the TYPE_LEN header byte. */
242 #define TYPE_LEN_DA_BIT 0x20
243 #define TYPE_LEN_DATA 0
244 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
246 /* How to compute the header bytes. */
247 #define HDR_SET_SYN(data, len, seq) (SYN)
248 #define HDR_SET_TYPE_LEN(data, len, seq) \
250 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
251 + (((len) >> 6) & 0x1f))
252 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
253 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
255 /* Check that a header byte is reasonable. */
256 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
258 /* Get data from the header. These macros evaluate their argument
260 #define HDR_IS_DATA(hdr) \
261 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
262 #define HDR_GET_LEN(hdr) \
263 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
264 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
266 /* The maximum data length. */
267 #define DATA_MAXLEN 1023
269 /* The trailer offset. */
270 #define TRLR_OFFSET HDR_OFFSET
272 /* The indices of the bytes in the packet trailer. */
273 #define TRLR_INDX_CSUM1 0
274 #define TRLR_INDX_CSUM2 1
275 #define TRLR_INDX_CSUM3 2
276 #define TRLR_LENGTH 3
278 /* How to compute the trailer bytes. */
279 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
280 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
281 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
283 /* Check that a trailer byte is reasonable. */
284 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
286 /* Get data from the trailer. This evaluates its argument multiple
288 #define TRLR_GET_CKSUM(trlr) \
289 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
290 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
291 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
293 /* The sequence number modulos. */
294 #define SEQ_MODULOS (64)
296 /* PMON commands to load from the serial port or UDP socket. */
297 #define LOAD_CMD "load -b -s tty0\r"
298 #define LOAD_CMD_UDP "load -b -s udp\r"
300 /* The target vectors for the four different remote MIPS targets.
301 These are initialized with code in _initialize_remote_mips instead
302 of static initializers, to make it easier to extend the target_ops
304 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, lsi_ops
;
306 enum mips_monitor_type
308 /* IDT/SIM monitor being used: */
310 /* PMON monitor being used: */
311 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
312 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
313 MON_LSI
, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
314 /* Last and unused value, for sizing vectors, etc. */
317 static enum mips_monitor_type mips_monitor
= MON_LAST
;
319 /* The monitor prompt text. If the user sets the PMON prompt
320 to some new value, the GDB `set monitor-prompt' command must also
321 be used to inform GDB about the expected prompt. Otherwise, GDB
322 will not be able to connect to PMON in mips_initialize().
323 If the `set monitor-prompt' command is not used, the expected
324 default prompt will be set according the target:
331 static char *mips_monitor_prompt
;
333 /* Set to 1 if the target is open. */
334 static int mips_is_open
;
336 /* Currently active target description (if mips_is_open == 1) */
337 static struct target_ops
*current_ops
;
339 /* Set to 1 while the connection is being initialized. */
340 static int mips_initializing
;
342 /* Set to 1 while the connection is being brought down. */
343 static int mips_exiting
;
345 /* The next sequence number to send. */
346 static unsigned int mips_send_seq
;
348 /* The next sequence number we expect to receive. */
349 static unsigned int mips_receive_seq
;
351 /* The time to wait before retransmitting a packet, in seconds. */
352 static int mips_retransmit_wait
= 3;
354 /* The number of times to try retransmitting a packet before giving up. */
355 static int mips_send_retries
= 10;
357 /* The number of garbage characters to accept when looking for an
358 SYN for the next packet. */
359 static int mips_syn_garbage
= 10;
361 /* The time to wait for a packet, in seconds. */
362 static int mips_receive_wait
= 5;
364 /* Set if we have sent a packet to the board but have not yet received
366 static int mips_need_reply
= 0;
368 /* Handle used to access serial I/O stream. */
369 static serial_t mips_desc
;
371 /* UDP handle used to download files to target. */
372 static serial_t udp_desc
;
373 static int udp_in_use
;
375 /* TFTP filename used to download files to DDB board, in the form
377 static char *tftp_name
; /* host:filename */
378 static char *tftp_localname
; /* filename portion of above */
379 static int tftp_in_use
;
380 static FILE *tftp_file
;
382 /* Counts the number of times the user tried to interrupt the target (usually
384 static int interrupt_count
;
386 /* If non-zero, means that the target is running. */
387 static int mips_wait_flag
= 0;
389 /* If non-zero, monitor supports breakpoint commands. */
390 static int monitor_supports_breakpoints
= 0;
392 /* Data cache header. */
394 #if 0 /* not used (yet?) */
395 static DCACHE
*mips_dcache
;
398 /* Non-zero means that we've just hit a read or write watchpoint */
399 static int hit_watchpoint
;
401 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
402 The table is indexed by a breakpoint number, which is an integer
403 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
405 #define MAX_LSI_BREAKPOINTS 256
406 struct lsi_breakpoint_info
408 enum break_type type
; /* type of breakpoint */
409 CORE_ADDR addr
; /* address of breakpoint */
410 int len
; /* length of region being watched */
411 unsigned long value
; /* value to watch */
413 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
415 /* Error/warning codes returned by LSI PMON for breakpoint commands.
416 Warning values may be ORed together; error values may not. */
417 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
418 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
419 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
420 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
422 #define E_ERR 0x200 /* This bit is set if the error code is an error */
423 #define E_BPT 0x200 /* error: No such breakpoint number */
424 #define E_RGE 0x201 /* error: Range is not supported */
425 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
426 #define E_OUT 0x203 /* error: Out of hardware resources */
427 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
431 int code
; /* error code */
432 char *string
; /* string associated with this code */
435 struct lsi_error lsi_warning_table
[] =
437 {W_MSK
, "Range feature is supported via mask"},
438 {W_VAL
, "Value check is not supported in hardware"},
439 {W_QAL
, "Requested qualifiers are not supported in hardware"},
443 struct lsi_error lsi_error_table
[] =
445 {E_BPT
, "No such breakpoint number"},
446 {E_RGE
, "Range is not supported"},
447 {E_QAL
, "The requested qualifiers can not be used"},
448 {E_OUT
, "Out of hardware resources"},
449 {E_NON
, "Hardware breakpoint not supported"},
453 /* Set to 1 with the 'set monitor-warnings' command to enable printing
454 of warnings returned by PMON when hardware breakpoints are used. */
455 static int monitor_warnings
;
462 SERIAL_CLOSE (mips_desc
);
466 SERIAL_CLOSE (udp_desc
);
472 /* Handle low-level error that we can't recover from. Note that just
473 error()ing out from target_wait or some such low-level place will cause
474 all hell to break loose--the rest of GDB will tend to get left in an
475 inconsistent state. */
478 mips_error (char *string
,...)
482 va_start (args
, string
);
484 target_terminal_ours ();
485 wrap_here (""); /* Force out any buffered output */
486 gdb_flush (gdb_stdout
);
488 fprintf_filtered (gdb_stderr
, error_pre_print
);
489 vfprintf_filtered (gdb_stderr
, string
, args
);
490 fprintf_filtered (gdb_stderr
, "\n");
492 gdb_flush (gdb_stderr
);
494 /* Clean up in such a way that mips_close won't try to talk to the
495 board (it almost surely won't work since we weren't able to talk to
499 printf_unfiltered ("Ending remote MIPS debugging.\n");
500 target_mourn_inferior ();
502 return_to_top_level (RETURN_ERROR
);
505 /* putc_readable - print a character, displaying non-printable chars in
506 ^x notation or in hex. */
509 fputc_readable (int ch
, struct ui_file
*file
)
512 fputc_unfiltered ('\n', file
);
514 fprintf_unfiltered (file
, "\\r");
515 else if (ch
< 0x20) /* ASCII control character */
516 fprintf_unfiltered (file
, "^%c", ch
+ '@');
517 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
518 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
520 fputc_unfiltered (ch
, file
);
524 /* puts_readable - print a string, displaying non-printable chars in
525 ^x notation or in hex. */
528 fputs_readable (const char *string
, struct ui_file
*file
)
532 while ((c
= *string
++) != '\0')
533 fputc_readable (c
, file
);
537 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
538 timed out. TIMEOUT specifies timeout value in seconds.
542 mips_expect_timeout (const char *string
, int timeout
)
544 const char *p
= string
;
548 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
549 fputs_readable (string
, gdb_stdlog
);
550 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
558 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
559 were waiting for the mips_monitor_prompt... */
561 c
= SERIAL_READCHAR (mips_desc
, timeout
);
563 if (c
== SERIAL_TIMEOUT
)
566 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
571 fputc_readable (c
, gdb_stdlog
);
579 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
592 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
593 timed out. The timeout value is hard-coded to 2 seconds. Use
594 mips_expect_timeout if a different timeout value is needed.
598 mips_expect (const char *string
)
600 return mips_expect_timeout (string
, remote_timeout
);
603 /* Read the required number of characters into the given buffer (which
604 is assumed to be large enough). The only failure is a timeout. */
606 mips_getstring (char *string
, int n
)
614 c
= SERIAL_READCHAR (mips_desc
, remote_timeout
);
616 if (c
== SERIAL_TIMEOUT
)
618 fprintf_unfiltered (gdb_stderr
,
619 "Failed to read %d characters from target (TIMEOUT)\n", n
);
632 /* Read a character from the remote, aborting on error. Returns
633 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
634 returns). FIXME: If we see the string mips_monitor_prompt from
635 the board, then we are debugging on the main console port, and we
636 have somehow dropped out of remote debugging mode. In this case,
637 we automatically go back in to remote debugging mode. This is a
638 hack, put in because I can't find any way for a program running on
639 the remote board to terminate without also ending remote debugging
640 mode. I assume users won't have any trouble with this; for one
641 thing, the IDT documentation generally assumes that the remote
642 debugging port is not the console port. This is, however, very
643 convenient for DejaGnu when you only have one connected serial
647 mips_readchar (int timeout
)
650 static int state
= 0;
651 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
657 if (i
== -1 && watchdog
> 0)
661 if (state
== mips_monitor_prompt_len
)
663 ch
= SERIAL_READCHAR (mips_desc
, timeout
);
665 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off */
667 target_mourn_inferior ();
668 error ("Watchdog has expired. Target detached.\n");
671 if (ch
== SERIAL_EOF
)
672 mips_error ("End of file from remote");
673 if (ch
== SERIAL_ERROR
)
674 mips_error ("Error reading from remote: %s", safe_strerror (errno
));
675 if (remote_debug
> 1)
677 /* Don't use _filtered; we can't deal with a QUIT out of
678 target_wait, and I think this might be called from there. */
679 if (ch
!= SERIAL_TIMEOUT
)
680 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
682 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
685 /* If we have seen mips_monitor_prompt and we either time out, or
686 we see a @ (which was echoed from a packet we sent), reset the
687 board as described above. The first character in a packet after
688 the SYN (which is not echoed) is always an @ unless the packet is
689 more than 64 characters long, which ours never are. */
690 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
691 && state
== mips_monitor_prompt_len
692 && !mips_initializing
695 if (remote_debug
> 0)
696 /* Don't use _filtered; we can't deal with a QUIT out of
697 target_wait, and I think this might be called from there. */
698 fprintf_unfiltered (gdb_stdlog
, "Reinitializing MIPS debugging mode\n");
705 /* At this point, about the only thing we can do is abort the command
706 in progress and get back to command level as quickly as possible. */
708 error ("Remote board reset, debug protocol re-initialized.");
711 if (ch
== mips_monitor_prompt
[state
])
719 /* Get a packet header, putting the data in the supplied buffer.
720 PGARBAGE is a pointer to the number of garbage characters received
721 so far. CH is the last character received. Returns 0 for success,
722 or -1 for timeout. */
725 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
731 /* Wait for a SYN. mips_syn_garbage is intended to prevent
732 sitting here indefinitely if the board sends us one garbage
733 character per second. ch may already have a value from the
734 last time through the loop. */
737 ch
= mips_readchar (timeout
);
738 if (ch
== SERIAL_TIMEOUT
)
742 /* Printing the character here lets the user of gdb see
743 what the program is outputting, if the debugging is
744 being done on the console port. Don't use _filtered:
745 we can't deal with a QUIT out of target_wait and
746 buffered target output confuses the user. */
747 if (!mips_initializing
|| remote_debug
> 0)
749 if (isprint (ch
) || isspace (ch
))
751 fputc_unfiltered (ch
, gdb_stdtarg
);
755 fputc_readable (ch
, gdb_stdtarg
);
757 gdb_flush (gdb_stdtarg
);
760 /* Only count unprintable characters. */
761 if (! (isprint (ch
) || isspace (ch
)))
764 if (mips_syn_garbage
> 0
765 && *pgarbage
> mips_syn_garbage
)
766 mips_error ("Debug protocol failure: more than %d characters before a sync.",
771 /* Get the packet header following the SYN. */
772 for (i
= 1; i
< HDR_LENGTH
; i
++)
774 ch
= mips_readchar (timeout
);
775 if (ch
== SERIAL_TIMEOUT
)
777 /* Make sure this is a header byte. */
778 if (ch
== SYN
|| !HDR_CHECK (ch
))
784 /* If we got the complete header, we can return. Otherwise we
785 loop around and keep looking for SYN. */
791 /* Get a packet header, putting the data in the supplied buffer.
792 PGARBAGE is a pointer to the number of garbage characters received
793 so far. The last character read is returned in *PCH. Returns 0
794 for success, -1 for timeout, -2 for error. */
797 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
, int *pch
, int timeout
)
802 for (i
= 0; i
< TRLR_LENGTH
; i
++)
804 ch
= mips_readchar (timeout
);
806 if (ch
== SERIAL_TIMEOUT
)
808 if (!TRLR_CHECK (ch
))
815 /* Get the checksum of a packet. HDR points to the packet header.
816 DATA points to the packet data. LEN is the length of DATA. */
819 mips_cksum (const unsigned char *hdr
, const unsigned char *data
, int len
)
821 register const unsigned char *p
;
827 /* The initial SYN is not included in the checksum. */
841 /* Send a packet containing the given ASCII string. */
844 mips_send_packet (const char *s
, int get_ack
)
846 /* unsigned */ int len
;
847 unsigned char *packet
;
852 if (len
> DATA_MAXLEN
)
853 mips_error ("MIPS protocol data packet too long: %s", s
);
855 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
857 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
858 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
859 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
860 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
862 memcpy (packet
+ HDR_LENGTH
, s
, len
);
864 cksum
= mips_cksum (packet
, packet
+ HDR_LENGTH
, len
);
865 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
866 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
867 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
869 /* Increment the sequence number. This will set mips_send_seq to
870 the sequence number we expect in the acknowledgement. */
871 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
873 /* We can only have one outstanding data packet, so we just wait for
874 the acknowledgement here. Keep retransmitting the packet until
875 we get one, or until we've tried too many times. */
876 for (try = 0; try < mips_send_retries
; try++)
881 if (remote_debug
> 0)
883 /* Don't use _filtered; we can't deal with a QUIT out of
884 target_wait, and I think this might be called from there. */
885 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
886 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
889 if (SERIAL_WRITE (mips_desc
, packet
,
890 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
891 mips_error ("write to target failed: %s", safe_strerror (errno
));
900 unsigned char hdr
[HDR_LENGTH
+ 1];
901 unsigned char trlr
[TRLR_LENGTH
+ 1];
905 /* Get the packet header. If we time out, resend the data
907 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
913 /* If we get a data packet, assume it is a duplicate and
914 ignore it. FIXME: If the acknowledgement is lost, this
915 data packet may be the packet the remote sends after the
917 if (HDR_IS_DATA (hdr
))
921 /* Ignore any errors raised whilst attempting to ignore
924 len
= HDR_GET_LEN (hdr
);
926 for (i
= 0; i
< len
; i
++)
930 rch
= mips_readchar (remote_timeout
);
936 if (rch
== SERIAL_TIMEOUT
)
938 /* ignore the character */
942 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
945 /* We don't bother checking the checksum, or providing an
946 ACK to the packet. */
950 /* If the length is not 0, this is a garbled packet. */
951 if (HDR_GET_LEN (hdr
) != 0)
954 /* Get the packet trailer. */
955 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
956 mips_retransmit_wait
);
958 /* If we timed out, resend the data packet. */
962 /* If we got a bad character, reread the header. */
966 /* If the checksum does not match the trailer checksum, this
967 is a bad packet; ignore it. */
968 if (mips_cksum (hdr
, (unsigned char *) NULL
, 0)
969 != TRLR_GET_CKSUM (trlr
))
972 if (remote_debug
> 0)
974 hdr
[HDR_LENGTH
] = '\0';
975 trlr
[TRLR_LENGTH
] = '\0';
976 /* Don't use _filtered; we can't deal with a QUIT out of
977 target_wait, and I think this might be called from there. */
978 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
979 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
982 /* If this ack is for the current packet, we're done. */
983 seq
= HDR_GET_SEQ (hdr
);
984 if (seq
== mips_send_seq
)
987 /* If this ack is for the last packet, resend the current
989 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
992 /* Otherwise this is a bad ack; ignore it. Increment the
993 garbage count to ensure that we do not stay in this loop
999 mips_error ("Remote did not acknowledge packet");
1002 /* Receive and acknowledge a packet, returning the data in BUFF (which
1003 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1004 implies that only the sender retransmits packets, so this code just
1005 waits silently for a packet. It returns the length of the received
1006 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1007 don't print an error message and return -1. */
1010 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1015 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1022 unsigned char hdr
[HDR_LENGTH
];
1023 unsigned char trlr
[TRLR_LENGTH
];
1027 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1030 mips_error ("Timed out waiting for remote packet");
1037 /* An acknowledgement is probably a duplicate; ignore it. */
1038 if (!HDR_IS_DATA (hdr
))
1040 len
= HDR_GET_LEN (hdr
);
1041 /* Check if the length is valid for an ACK, we may aswell
1042 try and read the remainder of the packet: */
1045 /* Ignore the error condition, since we are going to
1046 ignore the packet anyway. */
1047 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1049 /* Don't use _filtered; we can't deal with a QUIT out of
1050 target_wait, and I think this might be called from there. */
1051 if (remote_debug
> 0)
1052 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1056 len
= HDR_GET_LEN (hdr
);
1057 for (i
= 0; i
< len
; i
++)
1061 rch
= mips_readchar (timeout
);
1067 if (rch
== SERIAL_TIMEOUT
)
1070 mips_error ("Timed out waiting for remote packet");
1079 /* Don't use _filtered; we can't deal with a QUIT out of
1080 target_wait, and I think this might be called from there. */
1081 if (remote_debug
> 0)
1082 fprintf_unfiltered (gdb_stdlog
,
1083 "Got new SYN after %d chars (wanted %d)\n",
1088 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1092 mips_error ("Timed out waiting for packet");
1098 /* Don't use _filtered; we can't deal with a QUIT out of
1099 target_wait, and I think this might be called from there. */
1100 if (remote_debug
> 0)
1101 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1105 /* If this is the wrong sequence number, ignore it. */
1106 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
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
,
1112 "Ignoring sequence number %d (want %d)\n",
1113 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1117 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1120 if (remote_debug
> 0)
1121 /* Don't use _filtered; we can't deal with a QUIT out of
1122 target_wait, and I think this might be called from there. */
1123 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1124 mips_cksum (hdr
, buff
, len
),
1125 TRLR_GET_CKSUM (trlr
));
1127 /* The checksum failed. Send an acknowledgement for the
1128 previous packet to tell the remote to resend the packet. */
1129 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1130 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1131 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1132 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1134 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1136 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1137 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1138 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1140 if (remote_debug
> 0)
1142 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1143 /* Don't use _filtered; we can't deal with a QUIT out of
1144 target_wait, and I think this might be called from there. */
1145 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1149 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1152 mips_error ("write to target failed: %s", safe_strerror (errno
));
1158 if (remote_debug
> 0)
1161 /* Don't use _filtered; we can't deal with a QUIT out of
1162 target_wait, and I think this might be called from there. */
1163 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1166 /* We got the packet. Send an acknowledgement. */
1167 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1169 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1170 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1171 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1172 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1174 cksum
= mips_cksum (ack
, (unsigned char *) NULL
, 0);
1176 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1177 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1178 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1180 if (remote_debug
> 0)
1182 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1183 /* Don't use _filtered; we can't deal with a QUIT out of
1184 target_wait, and I think this might be called from there. */
1185 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1189 if (SERIAL_WRITE (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1192 mips_error ("write to target failed: %s", safe_strerror (errno
));
1200 /* Optionally send a request to the remote system and optionally wait
1201 for the reply. This implements the remote debugging protocol,
1202 which is built on top of the packet protocol defined above. Each
1203 request has an ADDR argument and a DATA argument. The following
1204 requests are defined:
1206 \0 don't send a request; just wait for a reply
1207 i read word from instruction space at ADDR
1208 d read word from data space at ADDR
1209 I write DATA to instruction space at ADDR
1210 D write DATA to data space at ADDR
1211 r read register number ADDR
1212 R set register number ADDR to value DATA
1213 c continue execution (if ADDR != 1, set pc to ADDR)
1214 s single step (if ADDR != 1, set pc to ADDR)
1216 The read requests return the value requested. The write requests
1217 return the previous value in the changed location. The execution
1218 requests return a UNIX wait value (the approximate signal which
1219 caused execution to stop is in the upper eight bits).
1221 If PERR is not NULL, this function waits for a reply. If an error
1222 occurs, it sets *PERR to 1 and sets errno according to what the
1223 target board reports. */
1226 mips_request (int cmd
,
1233 char myBuff
[DATA_MAXLEN
+ 1];
1238 unsigned long rresponse
;
1240 if (buff
== (char *) NULL
)
1245 if (mips_need_reply
)
1246 internal_error ("mips_request: Trying to send command before reply");
1247 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
, paddr_nz (addr
), paddr_nz (data
));
1248 mips_send_packet (buff
, 1);
1249 mips_need_reply
= 1;
1252 if (perr
== (int *) NULL
)
1255 if (!mips_need_reply
)
1256 internal_error ("mips_request: Trying to get reply before command");
1258 mips_need_reply
= 0;
1260 len
= mips_receive_packet (buff
, 1, timeout
);
1263 if (sscanf (buff
, "0x%x %c 0x%x 0x%lx",
1264 &rpid
, &rcmd
, &rerrflg
, &rresponse
) != 4
1265 || (cmd
!= '\0' && rcmd
!= cmd
))
1266 mips_error ("Bad response from remote board");
1272 /* FIXME: This will returns MIPS errno numbers, which may or may
1273 not be the same as errno values used on other systems. If
1274 they stick to common errno values, they will be the same, but
1275 if they don't, they must be translated. */
1286 mips_initialize_cleanups (PTR arg
)
1288 mips_initializing
= 0;
1292 mips_exit_cleanups (PTR arg
)
1298 mips_send_command (const char *cmd
, int prompt
)
1300 SERIAL_WRITE (mips_desc
, cmd
, strlen (cmd
));
1304 mips_expect (mips_monitor_prompt
);
1307 /* Enter remote (dbx) debug mode: */
1309 mips_enter_debug (void)
1311 /* Reset the sequence numbers, ready for the new debug sequence: */
1313 mips_receive_seq
= 0;
1315 if (mips_monitor
!= MON_IDT
)
1316 mips_send_command ("debug\r", 0);
1317 else /* assume IDT monitor by default */
1318 mips_send_command ("db tty0\r", 0);
1321 SERIAL_WRITE (mips_desc
, "\r", sizeof "\r" - 1);
1323 /* We don't need to absorb any spurious characters here, since the
1324 mips_receive_header will eat up a reasonable number of characters
1325 whilst looking for the SYN, however this avoids the "garbage"
1326 being displayed to the user. */
1327 if (mips_monitor
!= MON_IDT
)
1331 char buff
[DATA_MAXLEN
+ 1];
1332 if (mips_receive_packet (buff
, 1, 3) < 0)
1333 mips_error ("Failed to initialize (didn't receive packet).");
1337 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1339 mips_exit_debug (void)
1342 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1346 if (mips_monitor
!= MON_IDT
)
1348 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1349 so we do not get a reply to this command: */
1350 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1351 mips_need_reply
= 0;
1352 if (!mips_expect (" break!"))
1356 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1358 if (!mips_expect (mips_monitor_prompt
))
1361 do_cleanups (old_cleanups
);
1366 /* Initialize a new connection to the MIPS board, and make sure we are
1367 really connected. */
1370 mips_initialize (void)
1373 struct cleanup
*old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1376 /* What is this code doing here? I don't see any way it can happen, and
1377 it might mean mips_initializing didn't get cleared properly.
1378 So I'll make it a warning. */
1380 if (mips_initializing
)
1382 warning ("internal error: mips_initialize called twice");
1387 mips_initializing
= 1;
1389 /* At this point, the packit protocol isn't responding. We'll try getting
1390 into the monitor, and restarting the protocol. */
1392 /* Force the system into the monitor. After this we *should* be at
1393 the mips_monitor_prompt. */
1394 if (mips_monitor
!= MON_IDT
)
1395 j
= 0; /* start by checking if we are already at the prompt */
1397 j
= 1; /* start by sending a break */
1402 case 0: /* First, try sending a CR */
1403 SERIAL_FLUSH_INPUT (mips_desc
);
1404 SERIAL_WRITE (mips_desc
, "\r", 1);
1406 case 1: /* First, try sending a break */
1407 SERIAL_SEND_BREAK (mips_desc
);
1409 case 2: /* Then, try a ^C */
1410 SERIAL_WRITE (mips_desc
, "\003", 1);
1412 case 3: /* Then, try escaping from download */
1414 if (mips_monitor
!= MON_IDT
)
1418 /* We shouldn't need to send multiple termination
1419 sequences, since the target performs line (or
1420 block) reads, and then processes those
1421 packets. In-case we were downloading a large packet
1422 we flush the output buffer before inserting a
1423 termination sequence. */
1424 SERIAL_FLUSH_OUTPUT (mips_desc
);
1425 sprintf (tbuff
, "\r/E/E\r");
1426 SERIAL_WRITE (mips_desc
, tbuff
, 6);
1433 /* We are possibly in binary download mode, having
1434 aborted in the middle of an S-record. ^C won't
1435 work because of binary mode. The only reliable way
1436 out is to send enough termination packets (8 bytes)
1437 to fill up and then overflow the largest size
1438 S-record (255 bytes in this case). This amounts to
1442 mips_make_srec (srec
, '7', 0, NULL
, 0);
1444 for (i
= 1; i
<= 33; i
++)
1446 SERIAL_WRITE (mips_desc
, srec
, 8);
1448 if (SERIAL_READCHAR (mips_desc
, 0) >= 0)
1449 break; /* Break immediatly if we get something from
1456 mips_error ("Failed to initialize.");
1459 if (mips_expect (mips_monitor_prompt
))
1463 if (mips_monitor
!= MON_IDT
)
1465 /* Sometimes PMON ignores the first few characters in the first
1466 command sent after a load. Sending a blank command gets
1468 mips_send_command ("\r", -1);
1470 /* Ensure the correct target state: */
1471 if (mips_monitor
!= MON_LSI
)
1472 mips_send_command ("set regsize 64\r", -1);
1473 mips_send_command ("set hostport tty0\r", -1);
1474 mips_send_command ("set brkcmd \"\"\r", -1);
1475 /* Delete all the current breakpoints: */
1476 mips_send_command ("db *\r", -1);
1477 /* NOTE: PMON does not have breakpoint support through the
1478 "debug" mode, only at the monitor command-line. */
1481 mips_enter_debug ();
1483 /* Clear all breakpoints: */
1484 if ((mips_monitor
== MON_IDT
1485 && clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1486 || mips_monitor
== MON_LSI
)
1487 monitor_supports_breakpoints
= 1;
1489 monitor_supports_breakpoints
= 0;
1491 do_cleanups (old_cleanups
);
1493 /* If this doesn't call error, we have connected; we don't care if
1494 the request itself succeeds or fails. */
1496 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1497 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1498 select_frame (get_current_frame (), 0);
1501 /* Open a connection to the remote board. */
1503 common_open (struct target_ops
*ops
, char *name
, int from_tty
,
1504 enum mips_monitor_type new_monitor
,
1505 const char *new_monitor_prompt
)
1508 char *serial_port_name
;
1509 char *remote_name
= 0;
1510 char *local_name
= 0;
1515 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1516 device is attached to the target board (e.g., /dev/ttya).\n"
1517 "If you want to use TFTP to download to the board, specify the name of a\n"
1518 "temporary file to be used by GDB for downloads as the second argument.\n"
1519 "This filename must be in the form host:filename, where host is the name\n"
1520 "of the host running the TFTP server, and the file must be readable by the\n"
1521 "world. If the local name of the temporary file differs from the name as\n"
1522 "seen from the board via TFTP, specify that name as the third parameter.\n");
1524 /* Parse the serial port name, the optional TFTP name, and the
1525 optional local TFTP name. */
1526 if ((argv
= buildargv (name
)) == NULL
)
1528 make_cleanup_freeargv (argv
);
1530 serial_port_name
= xstrdup (argv
[0]);
1531 if (argv
[1]) /* remote TFTP name specified? */
1533 remote_name
= argv
[1];
1534 if (argv
[2]) /* local TFTP filename specified? */
1535 local_name
= argv
[2];
1538 target_preopen (from_tty
);
1541 unpush_target (current_ops
);
1543 /* Open and initialize the serial port. */
1544 mips_desc
= SERIAL_OPEN (serial_port_name
);
1545 if (mips_desc
== (serial_t
) NULL
)
1546 perror_with_name (serial_port_name
);
1548 if (baud_rate
!= -1)
1550 if (SERIAL_SETBAUDRATE (mips_desc
, baud_rate
))
1552 SERIAL_CLOSE (mips_desc
);
1553 perror_with_name (serial_port_name
);
1557 SERIAL_RAW (mips_desc
);
1559 /* Open and initialize the optional download port. If it is in the form
1560 hostname#portnumber, it's a UDP socket. If it is in the form
1561 hostname:filename, assume it's the TFTP filename that must be
1562 passed to the DDB board to tell it where to get the load file. */
1565 if (strchr (remote_name
, '#'))
1567 udp_desc
= SERIAL_OPEN (remote_name
);
1569 perror_with_name ("Unable to open UDP port");
1574 /* Save the remote and local names of the TFTP temp file. If
1575 the user didn't specify a local name, assume it's the same
1576 as the part of the remote name after the "host:". */
1580 xfree (tftp_localname
);
1581 if (local_name
== NULL
)
1582 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1583 local_name
++; /* skip over the colon */
1584 if (local_name
== NULL
)
1585 local_name
= remote_name
; /* local name same as remote name */
1586 tftp_name
= xstrdup (remote_name
);
1587 tftp_localname
= xstrdup (local_name
);
1595 /* Reset the expected monitor prompt if it's never been set before. */
1596 if (mips_monitor_prompt
== NULL
)
1597 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1598 mips_monitor
= new_monitor
;
1603 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1605 /* Switch to using remote target now. */
1608 /* FIXME: Should we call start_remote here? */
1610 /* Try to figure out the processor model if possible. */
1611 ptype
= mips_read_processor_type ();
1613 mips_set_processor_type_command (xstrdup (ptype
), 0);
1615 /* This is really the job of start_remote however, that makes an assumption
1616 that the target is about to print out a status message of some sort. That
1617 doesn't happen here (in fact, it may not be possible to get the monitor to
1618 send the appropriate packet). */
1620 flush_cached_frames ();
1621 registers_changed ();
1622 stop_pc
= read_pc ();
1623 set_current_frame (create_new_frame (read_fp (), stop_pc
));
1624 select_frame (get_current_frame (), 0);
1625 print_stack_frame (selected_frame
, -1, 1);
1626 xfree (serial_port_name
);
1630 mips_open (char *name
, int from_tty
)
1632 const char *monitor_prompt
= NULL
;
1633 if (TARGET_ARCHITECTURE
!= NULL
1634 && TARGET_ARCHITECTURE
->arch
== bfd_arch_mips
)
1636 switch (TARGET_ARCHITECTURE
->mach
)
1638 case bfd_mach_mips4100
:
1639 case bfd_mach_mips4300
:
1640 case bfd_mach_mips4600
:
1641 case bfd_mach_mips4650
:
1642 case bfd_mach_mips5000
:
1643 monitor_prompt
= "<RISQ> ";
1647 if (monitor_prompt
== NULL
)
1648 monitor_prompt
= "<IDT>";
1649 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1653 pmon_open (char *name
, int from_tty
)
1655 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1659 ddb_open (char *name
, int from_tty
)
1661 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1665 lsi_open (char *name
, int from_tty
)
1669 /* Clear the LSI breakpoint table. */
1670 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1671 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1673 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1676 /* Close a connection to the remote board. */
1679 mips_close (int quitting
)
1683 /* Get the board out of remote debugging mode. */
1684 (void) mips_exit_debug ();
1690 /* Detach from the remote board. */
1693 mips_detach (char *args
, int from_tty
)
1696 error ("Argument given to \"detach\" when remotely debugging.");
1703 printf_unfiltered ("Ending remote MIPS debugging.\n");
1706 /* Tell the target board to resume. This does not wait for a reply
1707 from the board, except in the case of single-stepping on LSI boards,
1708 where PMON does return a reply. */
1711 mips_resume (int pid
, int step
, enum target_signal siggnal
)
1715 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1716 a single step, so we wait for that. */
1717 mips_request (step
? 's' : 'c', 1, siggnal
,
1718 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1719 mips_receive_wait
, NULL
);
1722 /* Return the signal corresponding to SIG, where SIG is the number which
1723 the MIPS protocol uses for the signal. */
1725 mips_signal_from_protocol (int sig
)
1727 /* We allow a few more signals than the IDT board actually returns, on
1728 the theory that there is at least *some* hope that perhaps the numbering
1729 for these signals is widely agreed upon. */
1732 return TARGET_SIGNAL_UNKNOWN
;
1734 /* Don't want to use target_signal_from_host because we are converting
1735 from MIPS signal numbers, not host ones. Our internal numbers
1736 match the MIPS numbers for the signals the board can return, which
1737 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1738 return (enum target_signal
) sig
;
1741 /* Wait until the remote stops, and return a wait status. */
1744 mips_wait (int pid
, struct target_waitstatus
*status
)
1748 char buff
[DATA_MAXLEN
];
1754 interrupt_count
= 0;
1757 /* If we have not sent a single step or continue command, then the
1758 board is waiting for us to do something. Return a status
1759 indicating that it is stopped. */
1760 if (!mips_need_reply
)
1762 status
->kind
= TARGET_WAITKIND_STOPPED
;
1763 status
->value
.sig
= TARGET_SIGNAL_TRAP
;
1767 /* No timeout; we sit here as long as the program continues to execute. */
1769 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1772 mips_error ("Remote failure: %s", safe_strerror (errno
));
1774 /* On returning from a continue, the PMON monitor seems to start
1775 echoing back the messages we send prior to sending back the
1776 ACK. The code can cope with this, but to try and avoid the
1777 unnecessary serial traffic, and "spurious" characters displayed
1778 to the user, we cheat and reset the debug protocol. The problems
1779 seems to be caused by a check on the number of arguments, and the
1780 command length, within the monitor causing it to echo the command
1782 if (mips_monitor
== MON_PMON
)
1785 mips_enter_debug ();
1788 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1790 nfields
= sscanf (buff
, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1791 &rpc
, &rfp
, &rsp
, flags
);
1794 char buf
[MAX_REGISTER_RAW_SIZE
];
1796 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rpc
);
1797 supply_register (PC_REGNUM
, buf
);
1799 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (PC_REGNUM
), rfp
);
1800 supply_register (30, buf
); /* This register they are avoiding and so it is unnamed */
1802 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (SP_REGNUM
), rsp
);
1803 supply_register (SP_REGNUM
, buf
);
1805 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (FP_REGNUM
), 0);
1806 supply_register (FP_REGNUM
, buf
);
1812 for (i
= 0; i
<= 2; i
++)
1813 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1815 else if (flags
[i
] == '\000')
1820 if (strcmp (target_shortname
, "lsi") == 0)
1823 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1824 Right now, PMON doesn't give us enough information to determine which
1825 breakpoint we hit. So we have to look up the PC in our own table
1826 of breakpoints, and if found, assume it's just a normal instruction
1827 fetch breakpoint, not a data watchpoint. FIXME when PMON
1828 provides some way to tell us what type of breakpoint it is. */
1830 CORE_ADDR pc
= read_pc ();
1833 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1835 if (lsi_breakpoints
[i
].addr
== pc
1836 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1843 /* If a data breakpoint was hit, PMON returns the following packet:
1845 The return packet from an ordinary breakpoint doesn't have the
1846 extra 0x01 field tacked onto the end. */
1847 if (nfields
== 1 && rpc
== 1)
1852 /* NOTE: The following (sig) numbers are defined by PMON:
1853 SPP_SIGTRAP 5 breakpoint
1861 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1862 and so on, because the constants we want here are determined by the
1863 MIPS protocol and have nothing to do with what host we are running on. */
1864 if ((rstatus
& 0xff) == 0)
1866 status
->kind
= TARGET_WAITKIND_EXITED
;
1867 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1869 else if ((rstatus
& 0xff) == 0x7f)
1871 status
->kind
= TARGET_WAITKIND_STOPPED
;
1872 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1874 /* If the stop PC is in the _exit function, assume
1875 we hit the 'break 0x3ff' instruction in _exit, so this
1876 is not a normal breakpoint. */
1877 if (strcmp (target_shortname
, "lsi") == 0)
1880 CORE_ADDR func_start
;
1881 CORE_ADDR pc
= read_pc ();
1883 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1884 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1885 && func_start
== pc
)
1886 status
->kind
= TARGET_WAITKIND_EXITED
;
1891 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1892 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1898 /* We have to map between the register numbers used by gdb and the
1899 register numbers used by the debugging protocol. This function
1900 assumes that we are using tm-mips.h. */
1902 #define REGNO_OFFSET 96
1905 mips_map_regno (int regno
)
1909 if (regno
>= FP0_REGNUM
&& regno
< FP0_REGNUM
+ 32)
1910 return regno
- FP0_REGNUM
+ 32;
1914 return REGNO_OFFSET
+ 0;
1916 return REGNO_OFFSET
+ 1;
1918 return REGNO_OFFSET
+ 2;
1920 return REGNO_OFFSET
+ 3;
1922 return REGNO_OFFSET
+ 4;
1924 return REGNO_OFFSET
+ 5;
1926 /* FIXME: Is there a way to get the status register? */
1931 /* Fetch the remote registers. */
1934 mips_fetch_registers (int regno
)
1936 unsigned LONGEST val
;
1941 for (regno
= 0; regno
< NUM_REGS
; regno
++)
1942 mips_fetch_registers (regno
);
1946 if (regno
== FP_REGNUM
|| regno
== ZERO_REGNUM
)
1947 /* FP_REGNUM on the mips is a hack which is just supposed to read
1948 zero (see also mips-nat.c). */
1952 /* If PMON doesn't support this register, don't waste serial
1953 bandwidth trying to read it. */
1954 int pmon_reg
= mips_map_regno (regno
);
1955 if (regno
!= 0 && pmon_reg
== 0)
1959 /* Unfortunately the PMON version in the Vr4300 board has been
1960 compiled without the 64bit register access commands. This
1961 means we cannot get hold of the full register width. */
1962 if (mips_monitor
== MON_DDB
)
1963 val
= (unsigned) mips_request ('t', pmon_reg
, 0,
1964 &err
, mips_receive_wait
, NULL
);
1966 val
= mips_request ('r', pmon_reg
, 0,
1967 &err
, mips_receive_wait
, NULL
);
1969 mips_error ("Can't read register %d: %s", regno
,
1970 safe_strerror (errno
));
1975 char buf
[MAX_REGISTER_RAW_SIZE
];
1977 /* We got the number the register holds, but gdb expects to see a
1978 value in the target byte ordering. */
1979 store_unsigned_integer (buf
, REGISTER_RAW_SIZE (regno
), val
);
1980 supply_register (regno
, buf
);
1984 /* Prepare to store registers. The MIPS protocol can store individual
1985 registers, so this function doesn't have to do anything. */
1988 mips_prepare_to_store (void)
1992 /* Store remote register(s). */
1995 mips_store_registers (int regno
)
2001 for (regno
= 0; regno
< NUM_REGS
; regno
++)
2002 mips_store_registers (regno
);
2006 mips_request ('R', mips_map_regno (regno
),
2007 read_register (regno
),
2008 &err
, mips_receive_wait
, NULL
);
2010 mips_error ("Can't write register %d: %s", regno
, safe_strerror (errno
));
2013 /* Fetch a word from the target board. */
2016 mips_fetch_word (CORE_ADDR addr
)
2021 val
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2024 /* Data space failed; try instruction space. */
2025 val
= mips_request ('i', addr
, 0, &err
,
2026 mips_receive_wait
, NULL
);
2028 mips_error ("Can't read address 0x%s: %s",
2029 paddr_nz (addr
), safe_strerror (errno
));
2034 /* Store a word to the target board. Returns errno code or zero for
2035 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2036 memory location there. */
2038 /* FIXME! make sure only 32-bit quantities get stored! */
2040 mips_store_word (CORE_ADDR addr
, unsigned int val
, char *old_contents
)
2043 unsigned int oldcontents
;
2045 oldcontents
= mips_request ('D', addr
, val
, &err
,
2046 mips_receive_wait
, NULL
);
2049 /* Data space failed; try instruction space. */
2050 oldcontents
= mips_request ('I', addr
, val
, &err
,
2051 mips_receive_wait
, NULL
);
2055 if (old_contents
!= NULL
)
2056 store_unsigned_integer (old_contents
, 4, oldcontents
);
2060 /* Read or write LEN bytes from inferior memory at MEMADDR,
2061 transferring to or from debugger address MYADDR. Write to inferior
2062 if SHOULD_WRITE is nonzero. Returns length of data written or
2063 read; 0 for error. Note that protocol gives us the correct value
2064 for a longword, since it transfers values in ASCII. We want the
2065 byte values, so we have to swap the longword values. */
2067 static int mask_address_p
= 1;
2070 mips_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
2071 struct mem_attrib
*attrib ATTRIBUTE_UNUSED
,
2072 struct target_ops
*target ATTRIBUTE_UNUSED
)
2080 /* PMON targets do not cope well with 64 bit addresses. Mask the
2081 value down to 32 bits. */
2083 memaddr
&= (CORE_ADDR
) 0xffffffff;
2085 /* Round starting address down to longword boundary. */
2086 addr
= memaddr
& ~3;
2087 /* Round ending address up; get number of longwords that makes. */
2088 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2089 /* Allocate buffer of that many longwords. */
2090 buffer
= alloca (count
* 4);
2094 /* Fill start and end extra bytes of buffer with existing data. */
2095 if (addr
!= memaddr
|| len
< 4)
2097 /* Need part of initial word -- fetch it. */
2098 store_unsigned_integer (&buffer
[0], 4, mips_fetch_word (addr
));
2103 /* Need part of last word -- fetch it. FIXME: we do this even
2104 if we don't need it. */
2105 store_unsigned_integer (&buffer
[(count
- 1) * 4], 4,
2106 mips_fetch_word (addr
+ (count
- 1) * 4));
2109 /* Copy data to be written over corresponding part of buffer */
2111 memcpy ((char *) buffer
+ (memaddr
& 3), myaddr
, len
);
2113 /* Write the entire buffer. */
2115 for (i
= 0; i
< count
; i
++, addr
+= 4)
2117 status
= mips_store_word (addr
,
2118 extract_unsigned_integer (&buffer
[i
* 4], 4),
2120 /* Report each kilobyte (we download 32-bit words at a time) */
2123 printf_unfiltered ("*");
2124 gdb_flush (gdb_stdout
);
2131 /* FIXME: Do we want a QUIT here? */
2134 printf_unfiltered ("\n");
2138 /* Read all the longwords */
2139 for (i
= 0; i
< count
; i
++, addr
+= 4)
2141 store_unsigned_integer (&buffer
[i
* 4], 4, mips_fetch_word (addr
));
2145 /* Copy appropriate bytes out of the buffer. */
2146 memcpy (myaddr
, buffer
+ (memaddr
& 3), len
);
2151 /* Print info on this target. */
2154 mips_files_info (struct target_ops
*ignore
)
2156 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2159 /* Kill the process running on the board. This will actually only
2160 work if we are doing remote debugging over the console input. I
2161 think that if IDT/sim had the remote debug interrupt enabled on the
2162 right port, we could interrupt the process with a break signal. */
2167 if (!mips_wait_flag
)
2172 if (interrupt_count
>= 2)
2174 interrupt_count
= 0;
2176 target_terminal_ours ();
2178 if (query ("Interrupted while waiting for the program.\n\
2179 Give up (and stop debugging it)? "))
2181 /* Clean up in such a way that mips_close won't try to talk to the
2182 board (it almost surely won't work since we weren't able to talk to
2187 printf_unfiltered ("Ending remote MIPS debugging.\n");
2188 target_mourn_inferior ();
2190 return_to_top_level (RETURN_QUIT
);
2193 target_terminal_inferior ();
2196 if (remote_debug
> 0)
2197 printf_unfiltered ("Sending break\n");
2199 SERIAL_SEND_BREAK (mips_desc
);
2208 SERIAL_WRITE (mips_desc
, &cc
, 1);
2210 target_mourn_inferior ();
2215 /* Start running on the target board. */
2218 mips_create_inferior (char *execfile
, char *args
, char **env
)
2225 Can't pass arguments to remote MIPS board; arguments ignored.");
2226 /* And don't try to use them on the next "run" command. */
2227 execute_command ("set args", 0);
2230 if (execfile
== 0 || exec_bfd
== 0)
2231 error ("No executable file specified");
2233 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2235 init_wait_for_inferior ();
2237 /* FIXME: Should we set inferior_pid here? */
2239 proceed (entry_pt
, TARGET_SIGNAL_DEFAULT
, 0);
2242 /* Clean up after a process. Actually nothing to do. */
2245 mips_mourn_inferior (void)
2247 if (current_ops
!= NULL
)
2248 unpush_target (current_ops
);
2249 generic_mourn_inferior ();
2252 /* We can write a breakpoint and read the shadow contents in one
2255 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2256 support, we read the contents of the target location and stash it,
2257 then overwrite it with a breakpoint instruction. ADDR is the target
2258 location in the target machine. CONTENTS_CACHE is a pointer to
2259 memory allocated for saving the target contents. It is guaranteed
2260 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2261 is accomplished via BREAKPOINT_MAX). */
2264 mips_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2266 if (monitor_supports_breakpoints
)
2267 return set_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2269 return memory_insert_breakpoint (addr
, contents_cache
);
2273 mips_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2275 if (monitor_supports_breakpoints
)
2276 return clear_breakpoint (addr
, MIPS_INSTLEN
, BREAK_FETCH
);
2278 return memory_remove_breakpoint (addr
, contents_cache
);
2281 #if 0 /* currently not used */
2282 /* PMON does not currently provide support for the debug mode 'b'
2283 commands to manipulate breakpoints. However, if we wanted to use
2284 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2285 then this code performs the work needed to leave debug mode,
2286 set/clear the breakpoint, and then return to debug mode. */
2288 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2289 static CORE_ADDR mips_pmon_bp_info
[PMON_MAX_BP
];
2290 /* NOTE: The code relies on this vector being zero-initialised by the system */
2293 pmon_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2297 if (monitor_supports_breakpoints
)
2299 char tbuff
[12]; /* space for breakpoint command */
2303 /* PMON does not support debug level breakpoint set/remove: */
2304 if (mips_exit_debug ())
2305 mips_error ("Failed to exit debug mode");
2307 sprintf (tbuff
, "b %08x\r", addr
);
2308 mips_send_command (tbuff
, 0);
2310 mips_expect ("Bpt ");
2312 if (!mips_getstring (tbuff
, remote_timeout
))
2314 tbuff
[2] = '\0'; /* terminate the string */
2315 if (sscanf (tbuff
, "%d", &bpnum
) != 1)
2317 fprintf_unfiltered (gdb_stderr
,
2318 "Invalid decimal breakpoint number from target: %s\n", tbuff
);
2322 mips_expect (" = ");
2324 /* Lead in the hex number we are expecting: */
2328 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2329 which targets return 64-bit addresses? PMON returns only 32! */
2330 if (!mips_getstring (&tbuff
[2], 8))
2332 tbuff
[10] = '\0'; /* terminate the string */
2334 if (sscanf (tbuff
, "0x%08x", &bpaddr
) != 1)
2336 fprintf_unfiltered (gdb_stderr
,
2337 "Invalid hex address from target: %s\n", tbuff
);
2341 if (bpnum
>= PMON_MAX_BP
)
2343 fprintf_unfiltered (gdb_stderr
,
2344 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2345 bpnum
, PMON_MAX_BP
- 1);
2350 fprintf_unfiltered (gdb_stderr
, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr
, bpaddr
);
2352 mips_pmon_bp_info
[bpnum
] = bpaddr
;
2354 mips_expect ("\r\n");
2355 mips_expect (mips_monitor_prompt
);
2357 mips_enter_debug ();
2362 return mips_store_word (addr
, BREAK_INSN
, contents_cache
);
2366 pmon_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2368 if (monitor_supports_breakpoints
)
2371 char tbuff
[7]; /* enough for delete breakpoint command */
2373 for (bpnum
= 0; bpnum
< PMON_MAX_BP
; bpnum
++)
2374 if (mips_pmon_bp_info
[bpnum
] == addr
)
2377 if (bpnum
>= PMON_MAX_BP
)
2379 fprintf_unfiltered (gdb_stderr
,
2380 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2385 if (mips_exit_debug ())
2386 mips_error ("Failed to exit debug mode");
2388 sprintf (tbuff
, "db %02d\r", bpnum
);
2390 mips_send_command (tbuff
, -1);
2391 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2392 set" message will be returned. */
2394 mips_enter_debug ();
2399 return target_write_memory (addr
, contents_cache
, BREAK_INSN_SIZE
);
2404 /* Tell whether this target can support a hardware breakpoint. CNT
2405 is the number of hardware breakpoints already installed. This
2406 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2409 remote_mips_can_use_hardware_watchpoint (int cnt
)
2411 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2415 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2416 This is used for memory ref breakpoints. */
2418 static unsigned long
2419 calculate_mask (CORE_ADDR addr
, int len
)
2424 mask
= addr
^ (addr
+ len
- 1);
2426 for (i
= 32; i
>= 0; i
--)
2432 mask
= (unsigned long) 0xffffffff >> i
;
2438 /* Insert a hardware breakpoint. This works only on LSI targets, which
2439 implement ordinary breakpoints using hardware facilities. */
2442 remote_mips_insert_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2444 if (strcmp (target_shortname
, "lsi") == 0)
2445 return mips_insert_breakpoint (addr
, contents_cache
);
2451 /* Remove a hardware breakpoint. This works only on LSI targets, which
2452 implement ordinary breakpoints using hardware facilities. */
2455 remote_mips_remove_hw_breakpoint (CORE_ADDR addr
, char *contents_cache
)
2457 if (strcmp (target_shortname
, "lsi") == 0)
2458 return mips_remove_breakpoint (addr
, contents_cache
);
2463 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2464 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2468 remote_mips_set_watchpoint (CORE_ADDR addr
, int len
, int type
)
2470 if (set_breakpoint (addr
, len
, type
))
2477 remote_mips_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
2479 if (clear_breakpoint (addr
, len
, type
))
2486 remote_mips_stopped_by_watchpoint (void)
2488 return hit_watchpoint
;
2492 /* Insert a breakpoint. */
2495 set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2497 return common_breakpoint (1, addr
, len
, type
);
2501 /* Clear a breakpoint. */
2504 clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2506 return common_breakpoint (0, addr
, len
, type
);
2510 /* Check the error code from the return packet for an LSI breakpoint
2511 command. If there's no error, just return 0. If it's a warning,
2512 print the warning text and return 0. If it's an error, print
2513 the error text and return 1. <ADDR> is the address of the breakpoint
2514 that was being set. <RERRFLG> is the error code returned by PMON.
2515 This is a helper function for common_breakpoint. */
2518 check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2520 struct lsi_error
*err
;
2521 char *saddr
= paddr_nz (addr
); /* printable address string */
2523 if (rerrflg
== 0) /* no error */
2526 /* Warnings can be ORed together, so check them all. */
2527 if (rerrflg
& W_WARN
)
2529 if (monitor_warnings
)
2532 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2534 if ((err
->code
& rerrflg
) == err
->code
)
2537 fprintf_unfiltered (gdb_stderr
,
2538 "common_breakpoint (0x%s): Warning: %s\n",
2544 fprintf_unfiltered (gdb_stderr
,
2545 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2552 /* Errors are unique, i.e. can't be ORed together. */
2553 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2555 if ((err
->code
& rerrflg
) == err
->code
)
2557 fprintf_unfiltered (gdb_stderr
,
2558 "common_breakpoint (0x%s): Error: %s\n",
2564 fprintf_unfiltered (gdb_stderr
,
2565 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2572 /* This routine sends a breakpoint command to the remote target.
2574 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2575 <ADDR> is the address of the breakpoint.
2576 <LEN> the length of the region to break on.
2577 <TYPE> is the type of breakpoint:
2578 0 = write (BREAK_WRITE)
2579 1 = read (BREAK_READ)
2580 2 = read/write (BREAK_ACCESS)
2581 3 = instruction fetch (BREAK_FETCH)
2583 Return 0 if successful; otherwise 1. */
2586 common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2588 char buf
[DATA_MAXLEN
+ 1];
2590 int rpid
, rerrflg
, rresponse
, rlen
;
2593 addr
= ADDR_BITS_REMOVE (addr
);
2595 if (mips_monitor
== MON_LSI
)
2597 if (set
== 0) /* clear breakpoint */
2599 /* The LSI PMON "clear breakpoint" has this form:
2600 <pid> 'b' <bptn> 0x0
2602 <pid> 'b' 0x0 <code>
2604 <bptn> is a breakpoint number returned by an earlier 'B' command.
2605 Possible return codes: OK, E_BPT. */
2609 /* Search for the breakpoint in the table. */
2610 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2611 if (lsi_breakpoints
[i
].type
== type
2612 && lsi_breakpoints
[i
].addr
== addr
2613 && lsi_breakpoints
[i
].len
== len
)
2616 /* Clear the table entry and tell PMON to clear the breakpoint. */
2617 if (i
== MAX_LSI_BREAKPOINTS
)
2619 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2624 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2625 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2626 mips_send_packet (buf
, 1);
2628 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2631 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2633 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2635 return (check_lsi_error (addr
, rerrflg
));
2638 /* set a breakpoint */
2640 /* The LSI PMON "set breakpoint" command has this form:
2641 <pid> 'B' <addr> 0x0
2643 <pid> 'B' <bptn> <code>
2645 The "set data breakpoint" command has this form:
2647 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2649 where: type= "0x1" = read
2651 "0x3" = access (read or write)
2653 The reply returns two values:
2654 bptn - a breakpoint number, which is a small integer with
2655 possible values of zero through 255.
2656 code - an error return code, a value of zero indicates a
2657 succesful completion, other values indicate various
2658 errors and warnings.
2660 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2664 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2667 sprintf (buf
, "0x0 B 0x%s 0x0", paddr_nz (addr
));
2673 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr
),
2674 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2675 paddr_nz (addr
+ len
- 1));
2677 mips_send_packet (buf
, 1);
2679 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2682 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2683 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2684 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2685 mips_error ("common_breakpoint: Bad response from remote board: %s", buf
);
2688 if (check_lsi_error (addr
, rerrflg
))
2691 /* rresponse contains PMON's breakpoint number. Record the
2692 information for this breakpoint so we can clear it later. */
2693 lsi_breakpoints
[rresponse
].type
= type
;
2694 lsi_breakpoints
[rresponse
].addr
= addr
;
2695 lsi_breakpoints
[rresponse
].len
= len
;
2702 /* On non-LSI targets, the breakpoint command has this form:
2703 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2704 <MASK> is a don't care mask for addresses.
2705 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2709 mask
= calculate_mask (addr
, len
);
2712 if (set
) /* set a breakpoint */
2717 case BREAK_WRITE
: /* write */
2720 case BREAK_READ
: /* read */
2723 case BREAK_ACCESS
: /* read/write */
2726 case BREAK_FETCH
: /* fetch */
2734 sprintf (buf
, "0x0 B 0x%s 0x%s %s", paddr_nz (addr
),
2735 paddr_nz (mask
), flags
);
2740 sprintf (buf
, "0x0 b 0x%s", paddr_nz (addr
));
2743 mips_send_packet (buf
, 1);
2745 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2748 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2749 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2751 if (nfields
!= 4 || rcmd
!= cmd
)
2752 mips_error ("common_breakpoint: Bad response from remote board: %s",
2757 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2758 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2759 if (mips_monitor
== MON_DDB
)
2760 rresponse
= rerrflg
;
2761 if (rresponse
!= 22) /* invalid argument */
2762 fprintf_unfiltered (gdb_stderr
,
2763 "common_breakpoint (0x%s): Got error: 0x%x\n",
2764 paddr_nz (addr
), rresponse
);
2772 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2778 SERIAL_WRITE (mips_desc
, srec
, len
);
2780 ch
= mips_readchar (remote_timeout
);
2784 case SERIAL_TIMEOUT
:
2785 error ("Timeout during download.");
2789 case 0x15: /* NACK */
2790 fprintf_unfiltered (gdb_stderr
, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr
));
2793 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch
);
2798 /* Download a binary file by converting it to S records. */
2801 mips_load_srec (char *args
)
2805 char *buffer
, srec
[1024];
2807 unsigned int srec_frame
= 200;
2809 static int hashmark
= 1;
2811 buffer
= alloca (srec_frame
* 2 + 256);
2813 abfd
= bfd_openr (args
, 0);
2816 printf_filtered ("Unable to open file %s\n", args
);
2820 if (bfd_check_format (abfd
, bfd_object
) == 0)
2822 printf_filtered ("File is not an object file\n");
2826 /* This actually causes a download in the IDT binary format: */
2827 mips_send_command (LOAD_CMD
, 0);
2829 for (s
= abfd
->sections
; s
; s
= s
->next
)
2831 if (s
->flags
& SEC_LOAD
)
2833 unsigned int numbytes
;
2835 /* FIXME! vma too small????? */
2836 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2838 (long) (s
->vma
+ s
->_raw_size
));
2839 gdb_flush (gdb_stdout
);
2841 for (i
= 0; i
< s
->_raw_size
; i
+= numbytes
)
2843 numbytes
= min (srec_frame
, s
->_raw_size
- i
);
2845 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2847 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
, buffer
, numbytes
);
2848 send_srec (srec
, reclen
, s
->vma
+ i
);
2852 putchar_unfiltered ('#');
2853 gdb_flush (gdb_stdout
);
2856 } /* Per-packet (or S-record) loop */
2858 putchar_unfiltered ('\n');
2859 } /* Loadable sections */
2862 putchar_unfiltered ('\n');
2864 /* Write a type 7 terminator record. no data for a type 7, and there
2865 is no data, so len is 0. */
2867 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2869 send_srec (srec
, reclen
, abfd
->start_address
);
2871 SERIAL_FLUSH_INPUT (mips_desc
);
2875 * mips_make_srec -- make an srecord. This writes each line, one at a
2876 * time, each with it's own header and trailer line.
2877 * An srecord looks like this:
2879 * byte count-+ address
2880 * start ---+ | | data +- checksum
2882 * S01000006F6B692D746573742E73726563E4
2883 * S315000448600000000000000000FC00005900000000E9
2884 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2885 * S30B0004485A0000000000004E
2888 * S<type><length><address><data><checksum>
2892 * is the number of bytes following upto the checksum. Note that
2893 * this is not the number of chars following, since it takes two
2894 * chars to represent a byte.
2898 * 1) two byte address data record
2899 * 2) three byte address data record
2900 * 3) four byte address data record
2901 * 7) four byte address termination record
2902 * 8) three byte address termination record
2903 * 9) two byte address termination record
2906 * is the start address of the data following, or in the case of
2907 * a termination record, the start address of the image
2911 * is the sum of all the raw byte data in the record, from the length
2912 * upwards, modulo 256 and subtracted from 255.
2914 * This routine returns the length of the S-record.
2919 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2922 unsigned char checksum
;
2925 /* Create the header for the srec. addr_size is the number of bytes in the address,
2926 and 1 is the number of bytes in the count. */
2928 /* FIXME!! bigger buf required for 64-bit! */
2931 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2932 /* This assumes S3 style downloads (4byte addresses). There should
2933 probably be a check, or the code changed to make it more
2935 buf
[3] = memaddr
>> 24;
2936 buf
[4] = memaddr
>> 16;
2937 buf
[5] = memaddr
>> 8;
2939 memcpy (&buf
[7], myaddr
, len
);
2941 /* Note that the checksum is calculated on the raw data, not the
2942 hexified data. It includes the length, address and the data
2943 portions of the packet. */
2945 buf
+= 2; /* Point at length byte */
2946 for (i
= 0; i
< len
+ 4 + 1; i
++)
2954 /* The following manifest controls whether we enable the simple flow
2955 control support provided by the monitor. If enabled the code will
2956 wait for an affirmative ACK between transmitting packets. */
2957 #define DOETXACK (1)
2959 /* The PMON fast-download uses an encoded packet format constructed of
2960 3byte data packets (encoded as 4 printable ASCII characters), and
2961 escape sequences (preceded by a '/'):
2964 'C' compare checksum (12bit value, not included in checksum calculation)
2965 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2966 'Z' zero fill multiple of 3bytes
2967 'B' byte (12bit encoded value, of 8bit data)
2968 'A' address (36bit encoded value)
2969 'E' define entry as original address, and exit load
2971 The packets are processed in 4 character chunks, so the escape
2972 sequences that do not have any data (or variable length data)
2973 should be padded to a 4 character boundary. The decoder will give
2974 an error if the complete message block size is not a multiple of
2975 4bytes (size of record).
2977 The encoding of numbers is done in 6bit fields. The 6bit value is
2978 used to index into this string to get the specific character
2979 encoding for the value: */
2980 static char encoding
[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2982 /* Convert the number of bits required into an encoded number, 6bits
2983 at a time (range 0..63). Keep a checksum if required (passed
2984 pointer non-NULL). The function returns the number of encoded
2985 characters written into the buffer. */
2987 pmon_makeb64 (unsigned long v
, char *p
, int n
, int *chksum
)
2989 int count
= (n
/ 6);
2993 fprintf_unfiltered (gdb_stderr
,
2994 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n
, (n
== 1) ? "" : "s");
2999 fprintf_unfiltered (gdb_stderr
,
3000 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n
);
3004 /* Deal with the checksum: */
3010 *chksum
+= ((v
>> 24) & 0xFFF);
3012 *chksum
+= ((v
>> 12) & 0xFFF);
3014 *chksum
+= ((v
>> 0) & 0xFFF);
3021 *p
++ = encoding
[(v
>> n
) & 0x3F];
3028 /* Shorthand function (that could be in-lined) to output the zero-fill
3029 escape sequence into the data stream. */
3031 pmon_zeroset (int recsize
, char **buff
, int *amount
, unsigned int *chksum
)
3035 sprintf (*buff
, "/Z");
3036 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3037 *buff
+= (count
+ 2);
3039 return (recsize
+ count
+ 2);
3043 pmon_checkset (int recsize
, char **buff
, int *value
)
3047 /* Add the checksum (without updating the value): */
3048 sprintf (*buff
, "/C");
3049 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3050 *buff
+= (count
+ 2);
3051 sprintf (*buff
, "\n");
3052 *buff
+= 2; /* include zero terminator */
3053 /* Forcing a checksum validation clears the sum: */
3055 return (recsize
+ count
+ 3);
3058 /* Amount of padding we leave after at the end of the output buffer,
3059 for the checksum and line termination characters: */
3060 #define CHECKSIZE (4 + 4 + 4 + 2)
3061 /* zero-fill, checksum, transfer end and line termination space. */
3063 /* The amount of binary data loaded from the object file in a single
3065 #define BINCHUNK (1024)
3067 /* Maximum line of data accepted by the monitor: */
3068 #define MAXRECSIZE (550)
3069 /* NOTE: This constant depends on the monitor being used. This value
3070 is for PMON 5.x on the Cogent Vr4300 board. */
3073 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3074 int inamount
, int *recsize
, unsigned int *csum
,
3075 unsigned int *zerofill
)
3080 /* This is a simple check to ensure that our data will fit within
3081 the maximum allowable record size. Each record output is 4bytes
3082 in length. We must allow space for a pending zero fill command,
3083 the record, and a checksum record. */
3084 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3086 /* Process the binary data: */
3087 if ((inamount
- *inptr
) < 3)
3090 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3092 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3094 *recsize
+= (2 + count
);
3099 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16) | (inbuf
[*inptr
+ 1] << 8) | inbuf
[*inptr
+ 2]);
3100 /* Simple check for zero data. TODO: A better check would be
3101 to check the last, and then the middle byte for being zero
3102 (if the first byte is not). We could then check for
3103 following runs of zeros, and if above a certain size it is
3104 worth the 4 or 8 character hit of the byte insertions used
3105 to pad to the start of the zeroes. NOTE: This also depends
3106 on the alignment at the end of the zero run. */
3107 if (value
== 0x00000000)
3110 if (*zerofill
== 0xFFF) /* 12bit counter */
3111 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3116 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3117 count
= pmon_makeb64 (value
, p
, 24, csum
);
3130 pmon_check_ack (char *mesg
)
3132 #if defined(DOETXACK)
3137 c
= SERIAL_READCHAR (udp_in_use
? udp_desc
: mips_desc
,
3139 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3141 fprintf_unfiltered (gdb_stderr
,
3142 "Failed to receive valid ACK for %s\n", mesg
);
3143 return (-1); /* terminate the download */
3146 #endif /* DOETXACK */
3150 /* pmon_download - Send a sequence of characters to the PMON download port,
3151 which is either a serial port or a UDP socket. */
3154 pmon_start_download (void)
3158 /* Create the temporary download file. */
3159 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3160 perror_with_name (tftp_localname
);
3164 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3165 mips_expect ("Downloading from ");
3166 mips_expect (udp_in_use
? "udp" : "tty0");
3167 mips_expect (", ^C to abort\r\n");
3172 mips_expect_download (char *string
)
3174 if (!mips_expect (string
))
3176 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3178 remove (tftp_localname
); /* Remove temporary file */
3186 pmon_check_entry_address (char *entry_address
, int final
)
3188 char hexnumber
[9]; /* includes '\0' space */
3189 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3190 sprintf (hexnumber
, "%x", final
);
3191 mips_expect (hexnumber
);
3192 mips_expect ("\r\n");
3196 pmon_check_total (int bintotal
)
3198 char hexnumber
[9]; /* includes '\0' space */
3199 mips_expect ("\r\ntotal = 0x");
3200 sprintf (hexnumber
, "%x", bintotal
);
3201 mips_expect (hexnumber
);
3202 return mips_expect_download (" bytes\r\n");
3206 pmon_end_download (int final
, int bintotal
)
3208 char hexnumber
[9]; /* includes '\0' space */
3212 static char *load_cmd_prefix
= "load -b -s ";
3216 /* Close off the temporary file containing the load data. */
3220 /* Make the temporary file readable by the world. */
3221 if (stat (tftp_localname
, &stbuf
) == 0)
3222 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3224 /* Must reinitialize the board to prevent PMON from crashing. */
3225 mips_send_command ("initEther\r", -1);
3227 /* Send the load command. */
3228 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3229 strcpy (cmd
, load_cmd_prefix
);
3230 strcat (cmd
, tftp_name
);
3232 mips_send_command (cmd
, 0);
3234 if (!mips_expect_download ("Downloading from "))
3236 if (!mips_expect_download (tftp_name
))
3238 if (!mips_expect_download (", ^C to abort\r\n"))
3242 /* Wait for the stuff that PMON prints after the load has completed.
3243 The timeout value for use in the tftp case (15 seconds) was picked
3244 arbitrarily but might be too small for really large downloads. FIXME. */
3245 switch (mips_monitor
)
3248 pmon_check_ack ("termination");
3249 pmon_check_entry_address ("Entry address is ", final
);
3250 if (!pmon_check_total (bintotal
))
3254 pmon_check_entry_address ("Entry Address = ", final
);
3255 pmon_check_ack ("termination");
3256 if (!pmon_check_total (bintotal
))
3262 remove (tftp_localname
); /* Remove temporary file */
3266 pmon_download (char *buffer
, int length
)
3269 fwrite (buffer
, 1, length
, tftp_file
);
3271 SERIAL_WRITE (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3275 pmon_load_fast (char *file
)
3279 unsigned char *binbuf
;
3282 unsigned int csum
= 0;
3283 int hashmark
= !tftp_in_use
;
3288 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3289 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3291 abfd
= bfd_openr (file
, 0);
3294 printf_filtered ("Unable to open file %s\n", file
);
3298 if (bfd_check_format (abfd
, bfd_object
) == 0)
3300 printf_filtered ("File is not an object file\n");
3304 /* Setup the required download state: */
3305 mips_send_command ("set dlproto etxack\r", -1);
3306 mips_send_command ("set dlecho off\r", -1);
3307 /* NOTE: We get a "cannot set variable" message if the variable is
3308 already defined to have the argument we give. The code doesn't
3309 care, since it just scans to the next prompt anyway. */
3310 /* Start the download: */
3311 pmon_start_download ();
3313 /* Zero the checksum */
3314 sprintf (buffer
, "/Kxx\n");
3315 reclen
= strlen (buffer
);
3316 pmon_download (buffer
, reclen
);
3317 finished
= pmon_check_ack ("/Kxx");
3319 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3320 if (s
->flags
& SEC_LOAD
) /* only deal with loadable sections */
3322 bintotal
+= s
->_raw_size
;
3323 final
= (s
->vma
+ s
->_raw_size
);
3325 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
, (unsigned int) s
->vma
,
3326 (unsigned int) (s
->vma
+ s
->_raw_size
));
3327 gdb_flush (gdb_stdout
);
3329 /* Output the starting address */
3330 sprintf (buffer
, "/A");
3331 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3332 buffer
[2 + reclen
] = '\n';
3333 buffer
[3 + reclen
] = '\0';
3334 reclen
+= 3; /* for the initial escape code and carriage return */
3335 pmon_download (buffer
, reclen
);
3336 finished
= pmon_check_ack ("/A");
3340 unsigned int binamount
;
3341 unsigned int zerofill
= 0;
3347 for (i
= 0; ((i
< s
->_raw_size
) && !finished
); i
+= binamount
)
3351 binamount
= min (BINCHUNK
, s
->_raw_size
- i
);
3353 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3355 /* This keeps a rolling checksum, until we decide to output
3357 for (; ((binamount
- binptr
) > 0);)
3359 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
, &reclen
, &csum
, &zerofill
);
3360 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3362 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3363 pmon_download (buffer
, reclen
);
3364 finished
= pmon_check_ack ("data record");
3367 zerofill
= 0; /* do not transmit pending zerofills */
3373 putchar_unfiltered ('#');
3374 gdb_flush (gdb_stdout
);
3378 reclen
= 0; /* buffer processed */
3383 /* Ensure no out-standing zerofill requests: */
3385 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3387 /* and then flush the line: */
3390 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3391 /* Currently pmon_checkset outputs the line terminator by
3392 default, so we write out the buffer so far: */
3393 pmon_download (buffer
, reclen
);
3394 finished
= pmon_check_ack ("record remnant");
3398 putchar_unfiltered ('\n');
3401 /* Terminate the transfer. We know that we have an empty output
3402 buffer at this point. */
3403 sprintf (buffer
, "/E/E\n"); /* include dummy padding characters */
3404 reclen
= strlen (buffer
);
3405 pmon_download (buffer
, reclen
);
3408 { /* Ignore the termination message: */
3409 SERIAL_FLUSH_INPUT (udp_in_use
? udp_desc
: mips_desc
);
3412 { /* Deal with termination message: */
3413 pmon_end_download (final
, bintotal
);
3419 /* mips_load -- download a file. */
3422 mips_load (char *file
, int from_tty
)
3424 /* Get the board out of remote debugging mode. */
3425 if (mips_exit_debug ())
3426 error ("mips_load: Couldn't get into monitor mode.");
3428 if (mips_monitor
!= MON_IDT
)
3429 pmon_load_fast (file
);
3431 mips_load_srec (file
);
3435 /* Finally, make the PC point at the start address */
3436 if (mips_monitor
!= MON_IDT
)
3438 /* Work around problem where PMON monitor updates the PC after a load
3439 to a different value than GDB thinks it has. The following ensures
3440 that the write_pc() WILL update the PC value: */
3441 register_valid
[PC_REGNUM
] = 0;
3444 write_pc (bfd_get_start_address (exec_bfd
));
3446 inferior_pid
= 0; /* No process now */
3448 /* This is necessary because many things were based on the PC at the time that
3449 we attached to the monitor, which is no longer valid now that we have loaded
3450 new code (and just changed the PC). Another way to do this might be to call
3451 normal_stop, except that the stack may not be valid, and things would get
3452 horribly confused... */
3454 clear_symtab_users ();
3458 /* Pass the command argument as a packet to PMON verbatim. */
3461 pmon_command (char *args
, int from_tty
)
3463 char buf
[DATA_MAXLEN
+ 1];
3466 sprintf (buf
, "0x0 %s", args
);
3467 mips_send_packet (buf
, 1);
3468 printf_filtered ("Send packet: %s\n", buf
);
3470 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3472 printf_filtered ("Received packet: %s\n", buf
);
3476 _initialize_remote_mips (void)
3478 /* Initialize the fields in mips_ops that are common to all four targets. */
3479 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3480 mips_ops
.to_close
= mips_close
;
3481 mips_ops
.to_detach
= mips_detach
;
3482 mips_ops
.to_resume
= mips_resume
;
3483 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3484 mips_ops
.to_store_registers
= mips_store_registers
;
3485 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3486 mips_ops
.to_xfer_memory
= mips_xfer_memory
;
3487 mips_ops
.to_files_info
= mips_files_info
;
3488 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3489 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3490 mips_ops
.to_kill
= mips_kill
;
3491 mips_ops
.to_load
= mips_load
;
3492 mips_ops
.to_create_inferior
= mips_create_inferior
;
3493 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3494 mips_ops
.to_stratum
= process_stratum
;
3495 mips_ops
.to_has_all_memory
= 1;
3496 mips_ops
.to_has_memory
= 1;
3497 mips_ops
.to_has_stack
= 1;
3498 mips_ops
.to_has_registers
= 1;
3499 mips_ops
.to_has_execution
= 1;
3500 mips_ops
.to_magic
= OPS_MAGIC
;
3502 /* Copy the common fields to all four target vectors. */
3503 pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3505 /* Initialize target-specific fields in the target vectors. */
3506 mips_ops
.to_shortname
= "mips";
3507 mips_ops
.to_doc
= "\
3508 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3509 The argument is the device it is connected to or, if it contains a colon,\n\
3510 HOST:PORT to access a board over a network";
3511 mips_ops
.to_open
= mips_open
;
3512 mips_ops
.to_wait
= mips_wait
;
3514 pmon_ops
.to_shortname
= "pmon";
3515 pmon_ops
.to_doc
= "\
3516 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3517 line. The argument is the device it is connected to or, if it contains a\n\
3518 colon, HOST:PORT to access a board over a network";
3519 pmon_ops
.to_open
= pmon_open
;
3520 pmon_ops
.to_wait
= mips_wait
;
3522 ddb_ops
.to_shortname
= "ddb";
3524 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3525 line. The first argument is the device it is connected to or, if it contains\n\
3526 a colon, HOST:PORT to access a board over a network. The optional second\n\
3527 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3528 TFTP downloads to the board. The optional third parameter is the local name\n\
3529 of the TFTP temporary file, if it differs from the filename seen by the board.";
3530 ddb_ops
.to_open
= ddb_open
;
3531 ddb_ops
.to_wait
= mips_wait
;
3533 lsi_ops
.to_shortname
= "lsi";
3534 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3535 lsi_ops
.to_open
= lsi_open
;
3536 lsi_ops
.to_wait
= mips_wait
;
3538 /* Add the targets. */
3539 add_target (&mips_ops
);
3540 add_target (&pmon_ops
);
3541 add_target (&ddb_ops
);
3542 add_target (&lsi_ops
);
3545 add_set_cmd ("timeout", no_class
, var_zinteger
,
3546 (char *) &mips_receive_wait
,
3547 "Set timeout in seconds for remote MIPS serial I/O.",
3552 add_set_cmd ("retransmit-timeout", no_class
, var_zinteger
,
3553 (char *) &mips_retransmit_wait
,
3554 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3555 This is the number of seconds to wait for an acknowledgement to a packet\n\
3556 before resending the packet.", &setlist
),
3560 add_set_cmd ("syn-garbage-limit", no_class
, var_zinteger
,
3561 (char *) &mips_syn_garbage
,
3562 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3563 This is the maximum number of characters GDB will ignore when trying to\n\
3564 synchronize with the remote system. A value of -1 means that there is no limit\n\
3565 (Note that these characters are printed out even though they are ignored.)",
3570 (add_set_cmd ("monitor-prompt", class_obscure
, var_string
,
3571 (char *) &mips_monitor_prompt
,
3572 "Set the prompt that GDB expects from the monitor.",
3577 add_set_cmd ("monitor-warnings", class_obscure
, var_zinteger
,
3578 (char *) &monitor_warnings
,
3579 "Set printing of monitor warnings.\n"
3580 "When enabled, monitor warnings about hardware breakpoints "
3581 "will be displayed.",
3585 add_com ("pmon <command>", class_obscure
, pmon_command
,
3586 "Send a packet to PMON (must be in debug mode).");
3588 add_show_from_set (add_set_cmd ("mask-address", no_class
,
3589 var_boolean
, &mask_address_p
,
3590 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3591 Use \"on\" to enable the masking and \"off\" to disable it.\n",