1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993-1995, 2000 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. */
32 #include "remote-utils.h"
33 #include "gdb_string.h"
36 #include <sys/types.h>
39 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
41 #define S_IROTH S_IREAD
46 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
47 types passed by breakpoint.c to target_insert_watchpoint.
48 Value 3 is our own invention, and is used for ordinary instruction
49 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
59 /* Prototypes for local functions. */
61 static int mips_readchar PARAMS ((int timeout));
63 static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage,
64 int ch, int timeout));
66 static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage,
67 int *pch, int timeout));
69 static int mips_cksum PARAMS ((const unsigned char *hdr,
70 const unsigned char *data,
73 static void mips_send_packet PARAMS ((const char *s, int get_ack));
75 static void mips_send_command PARAMS ((const char *cmd, int prompt));
77 static int mips_receive_packet PARAMS ((char *buff, int throw_error,
80 static CORE_ADDR mips_request PARAMS ((int cmd, CORE_ADDR addr,
81 CORE_ADDR data, int *perr, int timeout,
84 static void mips_initialize PARAMS ((void));
86 static void mips_open PARAMS ((char *name, int from_tty));
88 static void pmon_open PARAMS ((char *name, int from_tty));
90 static void ddb_open PARAMS ((char *name, int from_tty));
92 static void lsi_open PARAMS ((char *name, int from_tty));
94 static void mips_close PARAMS ((int quitting));
96 static void mips_detach PARAMS ((char *args, int from_tty));
98 static void mips_resume PARAMS ((int pid, int step,
99 enum target_signal siggnal));
101 static int mips_wait PARAMS ((int pid, struct target_waitstatus * status));
103 static int mips_map_regno PARAMS ((int regno));
105 static void mips_fetch_registers PARAMS ((int regno));
107 static void mips_prepare_to_store PARAMS ((void));
109 static void mips_store_registers PARAMS ((int regno));
111 static unsigned int mips_fetch_word PARAMS ((CORE_ADDR addr));
113 static int mips_store_word PARAMS ((CORE_ADDR addr, unsigned int value,
114 char *old_contents));
116 static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
117 int write, struct target_ops * ignore));
119 static void mips_files_info PARAMS ((struct target_ops * ignore));
121 static void mips_create_inferior PARAMS ((char *execfile, char *args,
124 static void mips_mourn_inferior PARAMS ((void));
126 static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum));
128 static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount,
129 unsigned int *chksum));
131 static int pmon_checkset PARAMS ((int recsize, char **buff, int *value));
133 static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf,
134 int *inptr, int inamount, int *recsize,
135 unsigned int *csum, unsigned int *zerofill));
137 static int pmon_check_ack PARAMS ((char *mesg));
139 static void pmon_start_download PARAMS ((void));
141 static void pmon_end_download PARAMS ((int final, int bintotal));
143 static void pmon_download PARAMS ((char *buffer, int length));
145 static void pmon_load_fast PARAMS ((char *file));
147 static void mips_load PARAMS ((char *file, int from_tty));
149 static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr,
150 unsigned char *myaddr, int len));
152 static int set_breakpoint PARAMS ((CORE_ADDR addr, int len,
153 enum break_type type));
155 static int clear_breakpoint PARAMS ((CORE_ADDR addr, int len,
156 enum break_type type));
158 static int common_breakpoint PARAMS ((int set, CORE_ADDR addr, int len,
159 enum break_type type));
161 /* Forward declarations. */
162 extern struct target_ops mips_ops;
163 extern struct target_ops pmon_ops;
164 extern struct target_ops ddb_ops;
166 /* The MIPS remote debugging interface is built on top of a simple
167 packet protocol. Each packet is organized as follows:
169 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
170 may not appear anywhere else in the packet. Any time a SYN is
171 seen, a new packet should be assumed to have begun.
174 This byte contains the upper five bits of the logical length
175 of the data section, plus a single bit indicating whether this
176 is a data packet or an acknowledgement. The documentation
177 indicates that this bit is 1 for a data packet, but the actual
178 board uses 1 for an acknowledgement. The value of the byte is
179 0x40 + (ack ? 0x20 : 0) + (len >> 6)
180 (we always have 0 <= len < 1024). Acknowledgement packets do
181 not carry data, and must have a data length of 0.
183 LEN1 This byte contains the lower six bits of the logical length of
184 the data section. The value is
187 SEQ This byte contains the six bit sequence number of the packet.
190 An acknowlegment packet contains the sequence number of the
191 packet being acknowledged plus 1 modulo 64. Data packets are
192 transmitted in sequence. There may only be one outstanding
193 unacknowledged data packet at a time. The sequence numbers
194 are independent in each direction. If an acknowledgement for
195 the previous packet is received (i.e., an acknowledgement with
196 the sequence number of the packet just sent) the packet just
197 sent should be retransmitted. If no acknowledgement is
198 received within a timeout period, the packet should be
199 retransmitted. This has an unfortunate failure condition on a
200 high-latency line, as a delayed acknowledgement may lead to an
201 endless series of duplicate packets.
203 DATA The actual data bytes follow. The following characters are
204 escaped inline with DLE (ASCII 020, or ^P):
210 The additional DLE characters are not counted in the logical
211 length stored in the TYPE_LEN and LEN1 bytes.
216 These bytes contain an 18 bit checksum of the complete
217 contents of the packet excluding the SEQ byte and the
218 CSUM[123] bytes. The checksum is simply the twos complement
219 addition of all the bytes treated as unsigned characters. The
220 values of the checksum bytes are:
221 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
222 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
223 CSUM3: 0x40 + (cksum & 0x3f)
225 It happens that the MIPS remote debugging protocol always
226 communicates with ASCII strings. Because of this, this
227 implementation doesn't bother to handle the DLE quoting mechanism,
228 since it will never be required. */
232 /* The SYN character which starts each packet. */
235 /* The 0x40 used to offset each packet (this value ensures that all of
236 the header and trailer bytes, other than SYN, are printable ASCII
238 #define HDR_OFFSET 0x40
240 /* The indices of the bytes in the packet header. */
241 #define HDR_INDX_SYN 0
242 #define HDR_INDX_TYPE_LEN 1
243 #define HDR_INDX_LEN1 2
244 #define HDR_INDX_SEQ 3
247 /* The data/ack bit in the TYPE_LEN header byte. */
248 #define TYPE_LEN_DA_BIT 0x20
249 #define TYPE_LEN_DATA 0
250 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
252 /* How to compute the header bytes. */
253 #define HDR_SET_SYN(data, len, seq) (SYN)
254 #define HDR_SET_TYPE_LEN(data, len, seq) \
256 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
257 + (((len) >> 6) & 0x1f))
258 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
259 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
261 /* Check that a header byte is reasonable. */
262 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
264 /* Get data from the header. These macros evaluate their argument
266 #define HDR_IS_DATA(hdr) \
267 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
268 #define HDR_GET_LEN(hdr) \
269 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
270 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
272 /* The maximum data length. */
273 #define DATA_MAXLEN 1023
275 /* The trailer offset. */
276 #define TRLR_OFFSET HDR_OFFSET
278 /* The indices of the bytes in the packet trailer. */
279 #define TRLR_INDX_CSUM1 0
280 #define TRLR_INDX_CSUM2 1
281 #define TRLR_INDX_CSUM3 2
282 #define TRLR_LENGTH 3
284 /* How to compute the trailer bytes. */
285 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
286 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
287 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
289 /* Check that a trailer byte is reasonable. */
290 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
292 /* Get data from the trailer. This evaluates its argument multiple
294 #define TRLR_GET_CKSUM(trlr) \
295 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
296 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
297 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
299 /* The sequence number modulos. */
300 #define SEQ_MODULOS (64)
302 /* PMON commands to load from the serial port or UDP socket. */
303 #define LOAD_CMD "load -b -s tty0\r"
304 #define LOAD_CMD_UDP "load -b -s udp\r"
306 /* The target vectors for the four different remote MIPS targets.
307 These are initialized with code in _initialize_remote_mips instead
308 of static initializers, to make it easier to extend the target_ops
310 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
312 enum mips_monitor_type
314 /* IDT/SIM monitor being used: */
316 /* PMON monitor being used: */
317 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
318 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
319 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
320 /* Last and unused value, for sizing vectors, etc. */
323 static enum mips_monitor_type mips_monitor = MON_LAST;
325 /* The monitor prompt text. If the user sets the PMON prompt
326 to some new value, the GDB `set monitor-prompt' command must also
327 be used to inform GDB about the expected prompt. Otherwise, GDB
328 will not be able to connect to PMON in mips_initialize().
329 If the `set monitor-prompt' command is not used, the expected
330 default prompt will be set according the target:
337 static char *mips_monitor_prompt;
339 /* Set to 1 if the target is open. */
340 static int mips_is_open;
342 /* Currently active target description (if mips_is_open == 1) */
343 static struct target_ops *current_ops;
345 /* Set to 1 while the connection is being initialized. */
346 static int mips_initializing;
348 /* Set to 1 while the connection is being brought down. */
349 static int mips_exiting;
351 /* The next sequence number to send. */
352 static unsigned int mips_send_seq;
354 /* The next sequence number we expect to receive. */
355 static unsigned int mips_receive_seq;
357 /* The time to wait before retransmitting a packet, in seconds. */
358 static int mips_retransmit_wait = 3;
360 /* The number of times to try retransmitting a packet before giving up. */
361 static int mips_send_retries = 10;
363 /* The number of garbage characters to accept when looking for an
364 SYN for the next packet. */
365 static int mips_syn_garbage = 1050;
367 /* The time to wait for a packet, in seconds. */
368 static int mips_receive_wait = 5;
370 /* Set if we have sent a packet to the board but have not yet received
372 static int mips_need_reply = 0;
374 /* Handle used to access serial I/O stream. */
375 static serial_t mips_desc;
377 /* UDP handle used to download files to target. */
378 static serial_t udp_desc;
379 static int udp_in_use;
381 /* TFTP filename used to download files to DDB board, in the form
383 static char *tftp_name; /* host:filename */
384 static char *tftp_localname; /* filename portion of above */
385 static int tftp_in_use;
386 static FILE *tftp_file;
388 /* Counts the number of times the user tried to interrupt the target (usually
390 static int interrupt_count;
392 /* If non-zero, means that the target is running. */
393 static int mips_wait_flag = 0;
395 /* If non-zero, monitor supports breakpoint commands. */
396 static int monitor_supports_breakpoints = 0;
398 /* Data cache header. */
400 #if 0 /* not used (yet?) */
401 static DCACHE *mips_dcache;
404 /* Non-zero means that we've just hit a read or write watchpoint */
405 static int hit_watchpoint;
407 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
408 The table is indexed by a breakpoint number, which is an integer
409 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
411 #define MAX_LSI_BREAKPOINTS 256
412 struct lsi_breakpoint_info
414 enum break_type type; /* type of breakpoint */
415 CORE_ADDR addr; /* address of breakpoint */
416 int len; /* length of region being watched */
417 unsigned long value; /* value to watch */
419 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
421 /* Error/warning codes returned by LSI PMON for breakpoint commands.
422 Warning values may be ORed together; error values may not. */
423 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
424 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
425 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
426 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
428 #define E_ERR 0x200 /* This bit is set if the error code is an error */
429 #define E_BPT 0x200 /* error: No such breakpoint number */
430 #define E_RGE 0x201 /* error: Range is not supported */
431 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
432 #define E_OUT 0x203 /* error: Out of hardware resources */
433 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
437 int code; /* error code */
438 char *string; /* string associated with this code */
441 struct lsi_error lsi_warning_table[] =
443 {W_MSK, "Range feature is supported via mask"},
444 {W_VAL, "Value check is not supported in hardware"},
445 {W_QAL, "Requested qualifiers are not supported in hardware"},
449 struct lsi_error lsi_error_table[] =
451 {E_BPT, "No such breakpoint number"},
452 {E_RGE, "Range is not supported"},
453 {E_QAL, "The requested qualifiers can not be used"},
454 {E_OUT, "Out of hardware resources"},
455 {E_NON, "Hardware breakpoint not supported"},
459 /* Set to 1 with the 'set monitor-warnings' command to enable printing
460 of warnings returned by PMON when hardware breakpoints are used. */
461 static int monitor_warnings;
468 SERIAL_CLOSE (mips_desc);
472 SERIAL_CLOSE (udp_desc);
478 /* Handle low-level error that we can't recover from. Note that just
479 error()ing out from target_wait or some such low-level place will cause
480 all hell to break loose--the rest of GDB will tend to get left in an
481 inconsistent state. */
484 mips_error (char *string,...)
488 va_start (args, string);
490 target_terminal_ours ();
491 wrap_here (""); /* Force out any buffered output */
492 gdb_flush (gdb_stdout);
494 fprintf_filtered (gdb_stderr, error_pre_print);
495 vfprintf_filtered (gdb_stderr, string, args);
496 fprintf_filtered (gdb_stderr, "\n");
498 gdb_flush (gdb_stderr);
500 /* Clean up in such a way that mips_close won't try to talk to the
501 board (it almost surely won't work since we weren't able to talk to
505 printf_unfiltered ("Ending remote MIPS debugging.\n");
506 target_mourn_inferior ();
508 return_to_top_level (RETURN_ERROR);
511 /* putc_readable - print a character, displaying non-printable chars in
512 ^x notation or in hex. */
515 fputc_readable (ch, file)
517 struct ui_file *file;
520 fputc_unfiltered ('\n', file);
522 fprintf_unfiltered (file, "\\r");
523 else if (ch < 0x20) /* ASCII control character */
524 fprintf_unfiltered (file, "^%c", ch + '@');
525 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
526 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
528 fputc_unfiltered (ch, file);
532 /* puts_readable - print a string, displaying non-printable chars in
533 ^x notation or in hex. */
536 fputs_readable (string, file)
538 struct ui_file *file;
542 while ((c = *string++) != '\0')
543 fputc_readable (c, file);
547 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
548 timed out. TIMEOUT specifies timeout value in seconds.
552 mips_expect_timeout (string, timeout)
560 fprintf_unfiltered (gdb_stdlog, "Expected \"");
561 fputs_readable (string, gdb_stdlog);
562 fprintf_unfiltered (gdb_stdlog, "\", got \"");
570 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
571 were waiting for the mips_monitor_prompt... */
573 c = SERIAL_READCHAR (mips_desc, timeout);
575 if (c == SERIAL_TIMEOUT)
578 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
583 fputc_readable (c, gdb_stdlog);
591 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
604 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
605 timed out. The timeout value is hard-coded to 2 seconds. Use
606 mips_expect_timeout if a different timeout value is needed.
613 return mips_expect_timeout (string, 2);
616 /* Read the required number of characters into the given buffer (which
617 is assumed to be large enough). The only failure is a timeout. */
619 mips_getstring (string, n)
629 c = SERIAL_READCHAR (mips_desc, 2);
631 if (c == SERIAL_TIMEOUT)
633 fprintf_unfiltered (gdb_stderr,
634 "Failed to read %d characters from target (TIMEOUT)\n", n);
645 /* Read a character from the remote, aborting on error. Returns
646 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
647 returns). FIXME: If we see the string mips_monitor_prompt from
648 the board, then we are debugging on the main console port, and we
649 have somehow dropped out of remote debugging mode. In this case,
650 we automatically go back in to remote debugging mode. This is a
651 hack, put in because I can't find any way for a program running on
652 the remote board to terminate without also ending remote debugging
653 mode. I assume users won't have any trouble with this; for one
654 thing, the IDT documentation generally assumes that the remote
655 debugging port is not the console port. This is, however, very
656 convenient for DejaGnu when you only have one connected serial
660 mips_readchar (timeout)
664 static int state = 0;
665 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
671 if (i == -1 && watchdog > 0)
675 if (state == mips_monitor_prompt_len)
677 ch = SERIAL_READCHAR (mips_desc, timeout);
679 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
681 target_mourn_inferior ();
682 error ("Watchdog has expired. Target detached.\n");
685 if (ch == SERIAL_EOF)
686 mips_error ("End of file from remote");
687 if (ch == SERIAL_ERROR)
688 mips_error ("Error reading from remote: %s", safe_strerror (errno));
689 if (remote_debug > 1)
691 /* Don't use _filtered; we can't deal with a QUIT out of
692 target_wait, and I think this might be called from there. */
693 if (ch != SERIAL_TIMEOUT)
694 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
696 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
699 /* If we have seen mips_monitor_prompt and we either time out, or
700 we see a @ (which was echoed from a packet we sent), reset the
701 board as described above. The first character in a packet after
702 the SYN (which is not echoed) is always an @ unless the packet is
703 more than 64 characters long, which ours never are. */
704 if ((ch == SERIAL_TIMEOUT || ch == '@')
705 && state == mips_monitor_prompt_len
706 && !mips_initializing
709 if (remote_debug > 0)
710 /* Don't use _filtered; we can't deal with a QUIT out of
711 target_wait, and I think this might be called from there. */
712 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
719 /* At this point, about the only thing we can do is abort the command
720 in progress and get back to command level as quickly as possible. */
722 error ("Remote board reset, debug protocol re-initialized.");
725 if (ch == mips_monitor_prompt[state])
733 /* Get a packet header, putting the data in the supplied buffer.
734 PGARBAGE is a pointer to the number of garbage characters received
735 so far. CH is the last character received. Returns 0 for success,
736 or -1 for timeout. */
739 mips_receive_header (hdr, pgarbage, ch, timeout)
749 /* Wait for a SYN. mips_syn_garbage is intended to prevent
750 sitting here indefinitely if the board sends us one garbage
751 character per second. ch may already have a value from the
752 last time through the loop. */
755 ch = mips_readchar (timeout);
756 if (ch == SERIAL_TIMEOUT)
760 /* Printing the character here lets the user of gdb see
761 what the program is outputting, if the debugging is
762 being done on the console port. Don't use _filtered;
763 we can't deal with a QUIT out of target_wait. */
764 if (!mips_initializing || remote_debug > 0)
766 fputc_readable (ch, gdb_stdlog);
767 gdb_flush (gdb_stdlog);
771 if (mips_syn_garbage > 0
772 && *pgarbage > mips_syn_garbage)
773 mips_error ("Debug protocol failure: more than %d characters before a sync.",
778 /* Get the packet header following the SYN. */
779 for (i = 1; i < HDR_LENGTH; i++)
781 ch = mips_readchar (timeout);
782 if (ch == SERIAL_TIMEOUT)
784 /* Make sure this is a header byte. */
785 if (ch == SYN || !HDR_CHECK (ch))
791 /* If we got the complete header, we can return. Otherwise we
792 loop around and keep looking for SYN. */
798 /* Get a packet header, putting the data in the supplied buffer.
799 PGARBAGE is a pointer to the number of garbage characters received
800 so far. The last character read is returned in *PCH. Returns 0
801 for success, -1 for timeout, -2 for error. */
804 mips_receive_trailer (trlr, pgarbage, pch, timeout)
813 for (i = 0; i < TRLR_LENGTH; i++)
815 ch = mips_readchar (timeout);
817 if (ch == SERIAL_TIMEOUT)
819 if (!TRLR_CHECK (ch))
826 /* Get the checksum of a packet. HDR points to the packet header.
827 DATA points to the packet data. LEN is the length of DATA. */
830 mips_cksum (hdr, data, len)
831 const unsigned char *hdr;
832 const unsigned char *data;
835 register const unsigned char *p;
841 /* The initial SYN is not included in the checksum. */
855 /* Send a packet containing the given ASCII string. */
858 mips_send_packet (s, get_ack)
862 /* unsigned */ int len;
863 unsigned char *packet;
868 if (len > DATA_MAXLEN)
869 mips_error ("MIPS protocol data packet too long: %s", s);
871 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
873 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
874 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
875 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
876 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
878 memcpy (packet + HDR_LENGTH, s, len);
880 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
881 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
882 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
883 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
885 /* Increment the sequence number. This will set mips_send_seq to
886 the sequence number we expect in the acknowledgement. */
887 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
889 /* We can only have one outstanding data packet, so we just wait for
890 the acknowledgement here. Keep retransmitting the packet until
891 we get one, or until we've tried too many times. */
892 for (try = 0; try < mips_send_retries; try++)
897 if (remote_debug > 0)
899 /* Don't use _filtered; we can't deal with a QUIT out of
900 target_wait, and I think this might be called from there. */
901 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
902 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
905 if (SERIAL_WRITE (mips_desc, packet,
906 HDR_LENGTH + len + TRLR_LENGTH) != 0)
907 mips_error ("write to target failed: %s", safe_strerror (errno));
916 unsigned char hdr[HDR_LENGTH + 1];
917 unsigned char trlr[TRLR_LENGTH + 1];
921 /* Get the packet header. If we time out, resend the data
923 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
929 /* If we get a data packet, assume it is a duplicate and
930 ignore it. FIXME: If the acknowledgement is lost, this
931 data packet may be the packet the remote sends after the
933 if (HDR_IS_DATA (hdr))
937 /* Ignore any errors raised whilst attempting to ignore
940 len = HDR_GET_LEN (hdr);
942 for (i = 0; i < len; i++)
946 rch = mips_readchar (2);
952 if (rch == SERIAL_TIMEOUT)
954 /* ignore the character */
958 (void) mips_receive_trailer (trlr, &garbage, &ch, 2);
960 /* We don't bother checking the checksum, or providing an
961 ACK to the packet. */
965 /* If the length is not 0, this is a garbled packet. */
966 if (HDR_GET_LEN (hdr) != 0)
969 /* Get the packet trailer. */
970 err = mips_receive_trailer (trlr, &garbage, &ch,
971 mips_retransmit_wait);
973 /* If we timed out, resend the data packet. */
977 /* If we got a bad character, reread the header. */
981 /* If the checksum does not match the trailer checksum, this
982 is a bad packet; ignore it. */
983 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
984 != TRLR_GET_CKSUM (trlr))
987 if (remote_debug > 0)
989 hdr[HDR_LENGTH] = '\0';
990 trlr[TRLR_LENGTH] = '\0';
991 /* Don't use _filtered; we can't deal with a QUIT out of
992 target_wait, and I think this might be called from there. */
993 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
994 HDR_GET_SEQ (hdr), hdr + 1, trlr);
997 /* If this ack is for the current packet, we're done. */
998 seq = HDR_GET_SEQ (hdr);
999 if (seq == mips_send_seq)
1002 /* If this ack is for the last packet, resend the current
1004 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1007 /* Otherwise this is a bad ack; ignore it. Increment the
1008 garbage count to ensure that we do not stay in this loop
1014 mips_error ("Remote did not acknowledge packet");
1017 /* Receive and acknowledge a packet, returning the data in BUFF (which
1018 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1019 implies that only the sender retransmits packets, so this code just
1020 waits silently for a packet. It returns the length of the received
1021 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1022 don't print an error message and return -1. */
1025 mips_receive_packet (buff, throw_error, timeout)
1033 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1040 unsigned char hdr[HDR_LENGTH];
1041 unsigned char trlr[TRLR_LENGTH];
1045 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1048 mips_error ("Timed out waiting for remote packet");
1055 /* An acknowledgement is probably a duplicate; ignore it. */
1056 if (!HDR_IS_DATA (hdr))
1058 len = HDR_GET_LEN (hdr);
1059 /* Check if the length is valid for an ACK, we may aswell
1060 try and read the remainder of the packet: */
1063 /* Ignore the error condition, since we are going to
1064 ignore the packet anyway. */
1065 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1067 /* Don't use _filtered; we can't deal with a QUIT out of
1068 target_wait, and I think this might be called from there. */
1069 if (remote_debug > 0)
1070 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1074 len = HDR_GET_LEN (hdr);
1075 for (i = 0; i < len; i++)
1079 rch = mips_readchar (timeout);
1085 if (rch == SERIAL_TIMEOUT)
1088 mips_error ("Timed out waiting for remote packet");
1097 /* Don't use _filtered; we can't deal with a QUIT out of
1098 target_wait, and I think this might be called from there. */
1099 if (remote_debug > 0)
1100 fprintf_unfiltered (gdb_stdlog,
1101 "Got new SYN after %d chars (wanted %d)\n",
1106 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1110 mips_error ("Timed out waiting for packet");
1116 /* Don't use _filtered; we can't deal with a QUIT out of
1117 target_wait, and I think this might be called from there. */
1118 if (remote_debug > 0)
1119 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1123 /* If this is the wrong sequence number, ignore it. */
1124 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1126 /* Don't use _filtered; we can't deal with a QUIT out of
1127 target_wait, and I think this might be called from there. */
1128 if (remote_debug > 0)
1129 fprintf_unfiltered (gdb_stdlog,
1130 "Ignoring sequence number %d (want %d)\n",
1131 HDR_GET_SEQ (hdr), mips_receive_seq);
1135 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1138 if (remote_debug > 0)
1139 /* Don't use _filtered; we can't deal with a QUIT out of
1140 target_wait, and I think this might be called from there. */
1141 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1142 mips_cksum (hdr, buff, len),
1143 TRLR_GET_CKSUM (trlr));
1145 /* The checksum failed. Send an acknowledgement for the
1146 previous packet to tell the remote to resend the packet. */
1147 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1148 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1149 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1150 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1152 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1154 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1155 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1156 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1158 if (remote_debug > 0)
1160 ack[HDR_LENGTH + TRLR_LENGTH] = '\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 ("Writing ack %d \"%s\"\n", mips_receive_seq,
1167 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1170 mips_error ("write to target failed: %s", safe_strerror (errno));
1176 if (remote_debug > 0)
1179 /* Don't use _filtered; we can't deal with a QUIT out of
1180 target_wait, and I think this might be called from there. */
1181 printf_unfiltered ("Got packet \"%s\"\n", buff);
1184 /* We got the packet. Send an acknowledgement. */
1185 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1187 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1188 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1189 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1190 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1192 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1194 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1195 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1196 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1198 if (remote_debug > 0)
1200 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1201 /* Don't use _filtered; we can't deal with a QUIT out of
1202 target_wait, and I think this might be called from there. */
1203 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1207 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1210 mips_error ("write to target failed: %s", safe_strerror (errno));
1218 /* Optionally send a request to the remote system and optionally wait
1219 for the reply. This implements the remote debugging protocol,
1220 which is built on top of the packet protocol defined above. Each
1221 request has an ADDR argument and a DATA argument. The following
1222 requests are defined:
1224 \0 don't send a request; just wait for a reply
1225 i read word from instruction space at ADDR
1226 d read word from data space at ADDR
1227 I write DATA to instruction space at ADDR
1228 D write DATA to data space at ADDR
1229 r read register number ADDR
1230 R set register number ADDR to value DATA
1231 c continue execution (if ADDR != 1, set pc to ADDR)
1232 s single step (if ADDR != 1, set pc to ADDR)
1234 The read requests return the value requested. The write requests
1235 return the previous value in the changed location. The execution
1236 requests return a UNIX wait value (the approximate signal which
1237 caused execution to stop is in the upper eight bits).
1239 If PERR is not NULL, this function waits for a reply. If an error
1240 occurs, it sets *PERR to 1 and sets errno according to what the
1241 target board reports. */
1244 mips_request (cmd, addr, data, perr, timeout, buff)
1252 char myBuff[DATA_MAXLEN + 1];
1257 unsigned long rresponse;
1259 if (buff == (char *) NULL)
1264 if (mips_need_reply)
1265 internal_error ("mips_request: Trying to send command before reply");
1266 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data));
1267 mips_send_packet (buff, 1);
1268 mips_need_reply = 1;
1271 if (perr == (int *) NULL)
1274 if (!mips_need_reply)
1275 internal_error ("mips_request: Trying to get reply before command");
1277 mips_need_reply = 0;
1279 len = mips_receive_packet (buff, 1, timeout);
1282 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1283 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1284 || (cmd != '\0' && rcmd != cmd))
1285 mips_error ("Bad response from remote board");
1291 /* FIXME: This will returns MIPS errno numbers, which may or may
1292 not be the same as errno values used on other systems. If
1293 they stick to common errno values, they will be the same, but
1294 if they don't, they must be translated. */
1305 mips_initialize_cleanups (arg)
1308 mips_initializing = 0;
1312 mips_exit_cleanups (arg)
1319 mips_send_command (cmd, prompt)
1323 SERIAL_WRITE (mips_desc, cmd, strlen (cmd));
1327 mips_expect (mips_monitor_prompt);
1330 /* Enter remote (dbx) debug mode: */
1334 /* Reset the sequence numbers, ready for the new debug sequence: */
1336 mips_receive_seq = 0;
1338 if (mips_monitor != MON_IDT)
1339 mips_send_command ("debug\r", 0);
1340 else /* assume IDT monitor by default */
1341 mips_send_command ("db tty0\r", 0);
1344 SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1);
1346 /* We don't need to absorb any spurious characters here, since the
1347 mips_receive_header will eat up a reasonable number of characters
1348 whilst looking for the SYN, however this avoids the "garbage"
1349 being displayed to the user. */
1350 if (mips_monitor != MON_IDT)
1354 char buff[DATA_MAXLEN + 1];
1355 if (mips_receive_packet (buff, 1, 3) < 0)
1356 mips_error ("Failed to initialize (didn't receive packet).");
1360 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1365 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1369 if (mips_monitor != MON_IDT)
1371 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1372 so we do not get a reply to this command: */
1373 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL,
1374 mips_receive_wait, NULL);
1375 mips_need_reply = 0;
1376 if (!mips_expect (" break!"))
1380 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err,
1381 mips_receive_wait, NULL);
1383 if (!mips_expect (mips_monitor_prompt))
1386 do_cleanups (old_cleanups);
1391 /* Initialize a new connection to the MIPS board, and make sure we are
1392 really connected. */
1398 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1401 /* What is this code doing here? I don't see any way it can happen, and
1402 it might mean mips_initializing didn't get cleared properly.
1403 So I'll make it a warning. */
1405 if (mips_initializing)
1407 warning ("internal error: mips_initialize called twice");
1412 mips_initializing = 1;
1414 /* At this point, the packit protocol isn't responding. We'll try getting
1415 into the monitor, and restarting the protocol. */
1417 /* Force the system into the monitor. After this we *should* be at
1418 the mips_monitor_prompt. */
1419 if (mips_monitor != MON_IDT)
1420 j = 0; /* start by checking if we are already at the prompt */
1422 j = 1; /* start by sending a break */
1427 case 0: /* First, try sending a CR */
1428 SERIAL_FLUSH_INPUT (mips_desc);
1429 SERIAL_WRITE (mips_desc, "\r", 1);
1431 case 1: /* First, try sending a break */
1432 SERIAL_SEND_BREAK (mips_desc);
1434 case 2: /* Then, try a ^C */
1435 SERIAL_WRITE (mips_desc, "\003", 1);
1437 case 3: /* Then, try escaping from download */
1439 if (mips_monitor != MON_IDT)
1443 /* We shouldn't need to send multiple termination
1444 sequences, since the target performs line (or
1445 block) reads, and then processes those
1446 packets. In-case we were downloading a large packet
1447 we flush the output buffer before inserting a
1448 termination sequence. */
1449 SERIAL_FLUSH_OUTPUT (mips_desc);
1450 sprintf (tbuff, "\r/E/E\r");
1451 SERIAL_WRITE (mips_desc, tbuff, 6);
1458 /* We are possibly in binary download mode, having
1459 aborted in the middle of an S-record. ^C won't
1460 work because of binary mode. The only reliable way
1461 out is to send enough termination packets (8 bytes)
1462 to fill up and then overflow the largest size
1463 S-record (255 bytes in this case). This amounts to
1467 mips_make_srec (srec, '7', 0, NULL, 0);
1469 for (i = 1; i <= 33; i++)
1471 SERIAL_WRITE (mips_desc, srec, 8);
1473 if (SERIAL_READCHAR (mips_desc, 0) >= 0)
1474 break; /* Break immediatly if we get something from
1481 mips_error ("Failed to initialize.");
1484 if (mips_expect (mips_monitor_prompt))
1488 if (mips_monitor != MON_IDT)
1490 /* Sometimes PMON ignores the first few characters in the first
1491 command sent after a load. Sending a blank command gets
1493 mips_send_command ("\r", -1);
1495 /* Ensure the correct target state: */
1496 if (mips_monitor != MON_LSI)
1497 mips_send_command ("set regsize 64\r", -1);
1498 mips_send_command ("set hostport tty0\r", -1);
1499 mips_send_command ("set brkcmd \"\"\r", -1);
1500 /* Delete all the current breakpoints: */
1501 mips_send_command ("db *\r", -1);
1502 /* NOTE: PMON does not have breakpoint support through the
1503 "debug" mode, only at the monitor command-line. */
1506 mips_enter_debug ();
1508 /* Clear all breakpoints: */
1509 if ((mips_monitor == MON_IDT
1510 && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1511 || mips_monitor == MON_LSI)
1512 monitor_supports_breakpoints = 1;
1514 monitor_supports_breakpoints = 0;
1516 do_cleanups (old_cleanups);
1518 /* If this doesn't call error, we have connected; we don't care if
1519 the request itself succeeds or fails. */
1521 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err,
1522 mips_receive_wait, NULL);
1523 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1524 select_frame (get_current_frame (), 0);
1527 /* Open a connection to the remote board. */
1529 common_open (ops, name, from_tty, new_monitor, new_monitor_prompt)
1530 struct target_ops *ops;
1533 enum mips_monitor_type new_monitor;
1534 char *new_monitor_prompt;
1537 char *serial_port_name;
1538 char *remote_name = 0;
1539 char *local_name = 0;
1544 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1545 device is attached to the target board (e.g., /dev/ttya).\n"
1546 "If you want to use TFTP to download to the board, specify the name of a\n"
1547 "temporary file to be used by GDB for downloads as the second argument.\n"
1548 "This filename must be in the form host:filename, where host is the name\n"
1549 "of the host running the TFTP server, and the file must be readable by the\n"
1550 "world. If the local name of the temporary file differs from the name as\n"
1551 "seen from the board via TFTP, specify that name as the third parameter.\n");
1553 /* Parse the serial port name, the optional TFTP name, and the
1554 optional local TFTP name. */
1555 if ((argv = buildargv (name)) == NULL)
1557 make_cleanup_freeargv (argv);
1559 serial_port_name = strsave (argv[0]);
1560 if (argv[1]) /* remote TFTP name specified? */
1562 remote_name = argv[1];
1563 if (argv[2]) /* local TFTP filename specified? */
1564 local_name = argv[2];
1567 target_preopen (from_tty);
1570 unpush_target (current_ops);
1572 /* Open and initialize the serial port. */
1573 mips_desc = SERIAL_OPEN (serial_port_name);
1574 if (mips_desc == (serial_t) NULL)
1575 perror_with_name (serial_port_name);
1577 if (baud_rate != -1)
1579 if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
1581 SERIAL_CLOSE (mips_desc);
1582 perror_with_name (serial_port_name);
1586 SERIAL_RAW (mips_desc);
1588 /* Open and initialize the optional download port. If it is in the form
1589 hostname#portnumber, it's a UDP socket. If it is in the form
1590 hostname:filename, assume it's the TFTP filename that must be
1591 passed to the DDB board to tell it where to get the load file. */
1594 if (strchr (remote_name, '#'))
1596 udp_desc = SERIAL_OPEN (remote_name);
1598 perror_with_name ("Unable to open UDP port");
1603 /* Save the remote and local names of the TFTP temp file. If
1604 the user didn't specify a local name, assume it's the same
1605 as the part of the remote name after the "host:". */
1609 free (tftp_localname);
1610 if (local_name == NULL)
1611 if ((local_name = strchr (remote_name, ':')) != NULL)
1612 local_name++; /* skip over the colon */
1613 if (local_name == NULL)
1614 local_name = remote_name; /* local name same as remote name */
1615 tftp_name = strsave (remote_name);
1616 tftp_localname = strsave (local_name);
1624 /* Reset the expected monitor prompt if it's never been set before. */
1625 if (mips_monitor_prompt == NULL)
1626 mips_monitor_prompt = strsave (new_monitor_prompt);
1627 mips_monitor = new_monitor;
1632 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1634 /* Switch to using remote target now. */
1637 /* FIXME: Should we call start_remote here? */
1639 /* Try to figure out the processor model if possible. */
1640 ptype = mips_read_processor_type ();
1642 mips_set_processor_type_command (strsave (ptype), 0);
1644 /* This is really the job of start_remote however, that makes an assumption
1645 that the target is about to print out a status message of some sort. That
1646 doesn't happen here (in fact, it may not be possible to get the monitor to
1647 send the appropriate packet). */
1649 flush_cached_frames ();
1650 registers_changed ();
1651 stop_pc = read_pc ();
1652 set_current_frame (create_new_frame (read_fp (), stop_pc));
1653 select_frame (get_current_frame (), 0);
1654 print_stack_frame (selected_frame, -1, 1);
1655 free (serial_port_name);
1659 mips_open (name, from_tty)
1663 common_open (&mips_ops, name, from_tty, MON_IDT, TARGET_MONITOR_PROMPT);
1667 pmon_open (name, from_tty)
1671 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1675 ddb_open (name, from_tty)
1679 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1683 lsi_open (name, from_tty)
1689 /* Clear the LSI breakpoint table. */
1690 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1691 lsi_breakpoints[i].type = BREAK_UNUSED;
1693 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1696 /* Close a connection to the remote board. */
1699 mips_close (quitting)
1704 /* Get the board out of remote debugging mode. */
1705 (void) mips_exit_debug ();
1711 /* Detach from the remote board. */
1714 mips_detach (args, from_tty)
1719 error ("Argument given to \"detach\" when remotely debugging.");
1726 printf_unfiltered ("Ending remote MIPS debugging.\n");
1729 /* Tell the target board to resume. This does not wait for a reply
1730 from the board, except in the case of single-stepping on LSI boards,
1731 where PMON does return a reply. */
1734 mips_resume (pid, step, siggnal)
1736 enum target_signal siggnal;
1740 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1741 a single step, so we wait for that. */
1742 mips_request (step ? 's' : 'c',
1744 (unsigned int) siggnal,
1745 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1746 mips_receive_wait, NULL);
1749 /* Return the signal corresponding to SIG, where SIG is the number which
1750 the MIPS protocol uses for the signal. */
1752 mips_signal_from_protocol (sig)
1755 /* We allow a few more signals than the IDT board actually returns, on
1756 the theory that there is at least *some* hope that perhaps the numbering
1757 for these signals is widely agreed upon. */
1760 return TARGET_SIGNAL_UNKNOWN;
1762 /* Don't want to use target_signal_from_host because we are converting
1763 from MIPS signal numbers, not host ones. Our internal numbers
1764 match the MIPS numbers for the signals the board can return, which
1765 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1766 return (enum target_signal) sig;
1769 /* Wait until the remote stops, and return a wait status. */
1772 mips_wait (pid, status)
1774 struct target_waitstatus *status;
1778 char buff[DATA_MAXLEN];
1784 interrupt_count = 0;
1787 /* If we have not sent a single step or continue command, then the
1788 board is waiting for us to do something. Return a status
1789 indicating that it is stopped. */
1790 if (!mips_need_reply)
1792 status->kind = TARGET_WAITKIND_STOPPED;
1793 status->value.sig = TARGET_SIGNAL_TRAP;
1797 /* No timeout; we sit here as long as the program continues to execute. */
1799 rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1,
1803 mips_error ("Remote failure: %s", safe_strerror (errno));
1805 /* On returning from a continue, the PMON monitor seems to start
1806 echoing back the messages we send prior to sending back the
1807 ACK. The code can cope with this, but to try and avoid the
1808 unnecessary serial traffic, and "spurious" characters displayed
1809 to the user, we cheat and reset the debug protocol. The problems
1810 seems to be caused by a check on the number of arguments, and the
1811 command length, within the monitor causing it to echo the command
1813 if (mips_monitor == MON_PMON)
1816 mips_enter_debug ();
1819 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1821 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1822 &rpc, &rfp, &rsp, flags);
1825 char buf[MAX_REGISTER_RAW_SIZE];
1827 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc);
1828 supply_register (PC_REGNUM, buf);
1830 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp);
1831 supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
1833 store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp);
1834 supply_register (SP_REGNUM, buf);
1836 store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0);
1837 supply_register (FP_REGNUM, buf);
1843 for (i = 0; i <= 2; i++)
1844 if (flags[i] == 'r' || flags[i] == 'w')
1846 else if (flags[i] == '\000')
1851 if (strcmp (target_shortname, "lsi") == 0)
1854 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1855 Right now, PMON doesn't give us enough information to determine which
1856 breakpoint we hit. So we have to look up the PC in our own table
1857 of breakpoints, and if found, assume it's just a normal instruction
1858 fetch breakpoint, not a data watchpoint. FIXME when PMON
1859 provides some way to tell us what type of breakpoint it is. */
1861 CORE_ADDR pc = read_pc ();
1864 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1866 if (lsi_breakpoints[i].addr == pc
1867 && lsi_breakpoints[i].type == BREAK_FETCH)
1874 /* If a data breakpoint was hit, PMON returns the following packet:
1876 The return packet from an ordinary breakpoint doesn't have the
1877 extra 0x01 field tacked onto the end. */
1878 if (nfields == 1 && rpc == 1)
1883 /* NOTE: The following (sig) numbers are defined by PMON:
1884 SPP_SIGTRAP 5 breakpoint
1892 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1893 and so on, because the constants we want here are determined by the
1894 MIPS protocol and have nothing to do with what host we are running on. */
1895 if ((rstatus & 0xff) == 0)
1897 status->kind = TARGET_WAITKIND_EXITED;
1898 status->value.integer = (((rstatus) >> 8) & 0xff);
1900 else if ((rstatus & 0xff) == 0x7f)
1902 status->kind = TARGET_WAITKIND_STOPPED;
1903 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1905 /* If the stop PC is in the _exit function, assume
1906 we hit the 'break 0x3ff' instruction in _exit, so this
1907 is not a normal breakpoint. */
1908 if (strcmp (target_shortname, "lsi") == 0)
1911 CORE_ADDR func_start;
1912 CORE_ADDR pc = read_pc ();
1914 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1915 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1916 && func_start == pc)
1917 status->kind = TARGET_WAITKIND_EXITED;
1922 status->kind = TARGET_WAITKIND_SIGNALLED;
1923 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1929 /* We have to map between the register numbers used by gdb and the
1930 register numbers used by the debugging protocol. This function
1931 assumes that we are using tm-mips.h. */
1933 #define REGNO_OFFSET 96
1936 mips_map_regno (regno)
1941 if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
1942 return regno - FP0_REGNUM + 32;
1946 return REGNO_OFFSET + 0;
1948 return REGNO_OFFSET + 1;
1950 return REGNO_OFFSET + 2;
1952 return REGNO_OFFSET + 3;
1954 return REGNO_OFFSET + 4;
1956 return REGNO_OFFSET + 5;
1958 /* FIXME: Is there a way to get the status register? */
1963 /* Fetch the remote registers. */
1966 mips_fetch_registers (regno)
1969 unsigned LONGEST val;
1974 for (regno = 0; regno < NUM_REGS; regno++)
1975 mips_fetch_registers (regno);
1979 if (regno == FP_REGNUM || regno == ZERO_REGNUM)
1980 /* FP_REGNUM on the mips is a hack which is just supposed to read
1981 zero (see also mips-nat.c). */
1985 /* If PMON doesn't support this register, don't waste serial
1986 bandwidth trying to read it. */
1987 int pmon_reg = mips_map_regno (regno);
1988 if (regno != 0 && pmon_reg == 0)
1992 /* Unfortunately the PMON version in the Vr4300 board has been
1993 compiled without the 64bit register access commands. This
1994 means we cannot get hold of the full register width. */
1995 if (mips_monitor == MON_DDB)
1996 val = (unsigned) mips_request ('t', (unsigned int) pmon_reg,
1997 (unsigned int) 0, &err, mips_receive_wait, NULL);
1999 val = mips_request ('r', (unsigned int) pmon_reg,
2000 (unsigned int) 0, &err, mips_receive_wait, NULL);
2002 mips_error ("Can't read register %d: %s", regno,
2003 safe_strerror (errno));
2008 char buf[MAX_REGISTER_RAW_SIZE];
2010 /* We got the number the register holds, but gdb expects to see a
2011 value in the target byte ordering. */
2012 store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val);
2013 supply_register (regno, buf);
2017 /* Prepare to store registers. The MIPS protocol can store individual
2018 registers, so this function doesn't have to do anything. */
2021 mips_prepare_to_store ()
2025 /* Store remote register(s). */
2028 mips_store_registers (regno)
2035 for (regno = 0; regno < NUM_REGS; regno++)
2036 mips_store_registers (regno);
2040 mips_request ('R', (unsigned int) mips_map_regno (regno),
2041 read_register (regno),
2042 &err, mips_receive_wait, NULL);
2044 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2047 /* Fetch a word from the target board. */
2050 mips_fetch_word (addr)
2056 /* FIXME! addr was cast to uint! */
2057 val = mips_request ('d', addr, (unsigned int) 0, &err,
2058 mips_receive_wait, NULL);
2061 /* Data space failed; try instruction space. */
2062 /* FIXME! addr was cast to uint! */
2063 val = mips_request ('i', addr, (unsigned int) 0, &err,
2064 mips_receive_wait, NULL);
2066 mips_error ("Can't read address 0x%s: %s",
2067 paddr_nz (addr), safe_strerror (errno));
2072 /* Store a word to the target board. Returns errno code or zero for
2073 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2074 memory location there. */
2076 /* FIXME! make sure only 32-bit quantities get stored! */
2078 mips_store_word (addr, val, old_contents)
2084 unsigned int oldcontents;
2086 oldcontents = mips_request ('D', addr, (unsigned int) val,
2088 mips_receive_wait, NULL);
2091 /* Data space failed; try instruction space. */
2092 oldcontents = mips_request ('I', addr,
2093 (unsigned int) val, &err,
2094 mips_receive_wait, NULL);
2098 if (old_contents != NULL)
2099 store_unsigned_integer (old_contents, 4, oldcontents);
2103 /* Read or write LEN bytes from inferior memory at MEMADDR,
2104 transferring to or from debugger address MYADDR. Write to inferior
2105 if SHOULD_WRITE is nonzero. Returns length of data written or
2106 read; 0 for error. Note that protocol gives us the correct value
2107 for a longword, since it transfers values in ASCII. We want the
2108 byte values, so we have to swap the longword values. */
2111 mips_xfer_memory (memaddr, myaddr, len, write, ignore)
2116 struct target_ops *ignore;
2119 /* Round starting address down to longword boundary. */
2120 register CORE_ADDR addr = memaddr & ~3;
2121 /* Round ending address up; get number of longwords that makes. */
2122 register int count = (((memaddr + len) - addr) + 3) / 4;
2123 /* Allocate buffer of that many longwords. */
2124 register char *buffer = alloca (count * 4);
2130 /* Fill start and end extra bytes of buffer with existing data. */
2131 if (addr != memaddr || len < 4)
2133 /* Need part of initial word -- fetch it. */
2134 store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr));
2139 /* Need part of last word -- fetch it. FIXME: we do this even
2140 if we don't need it. */
2141 store_unsigned_integer (&buffer[(count - 1) * 4], 4,
2142 mips_fetch_word (addr + (count - 1) * 4));
2145 /* Copy data to be written over corresponding part of buffer */
2147 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2149 /* Write the entire buffer. */
2151 for (i = 0; i < count; i++, addr += 4)
2153 status = mips_store_word (addr,
2154 extract_unsigned_integer (&buffer[i * 4], 4),
2156 /* Report each kilobyte (we download 32-bit words at a time) */
2159 printf_unfiltered ("*");
2160 gdb_flush (gdb_stdout);
2167 /* FIXME: Do we want a QUIT here? */
2170 printf_unfiltered ("\n");
2174 /* Read all the longwords */
2175 for (i = 0; i < count; i++, addr += 4)
2177 store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr));
2181 /* Copy appropriate bytes out of the buffer. */
2182 memcpy (myaddr, buffer + (memaddr & 3), len);
2187 /* Print info on this target. */
2190 mips_files_info (ignore)
2191 struct target_ops *ignore;
2193 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2196 /* Kill the process running on the board. This will actually only
2197 work if we are doing remote debugging over the console input. I
2198 think that if IDT/sim had the remote debug interrupt enabled on the
2199 right port, we could interrupt the process with a break signal. */
2204 if (!mips_wait_flag)
2209 if (interrupt_count >= 2)
2211 interrupt_count = 0;
2213 target_terminal_ours ();
2215 if (query ("Interrupted while waiting for the program.\n\
2216 Give up (and stop debugging it)? "))
2218 /* Clean up in such a way that mips_close won't try to talk to the
2219 board (it almost surely won't work since we weren't able to talk to
2224 printf_unfiltered ("Ending remote MIPS debugging.\n");
2225 target_mourn_inferior ();
2227 return_to_top_level (RETURN_QUIT);
2230 target_terminal_inferior ();
2233 if (remote_debug > 0)
2234 printf_unfiltered ("Sending break\n");
2236 SERIAL_SEND_BREAK (mips_desc);
2245 SERIAL_WRITE (mips_desc, &cc, 1);
2247 target_mourn_inferior ();
2252 /* Start running on the target board. */
2255 mips_create_inferior (execfile, args, env)
2265 Can't pass arguments to remote MIPS board; arguments ignored.");
2266 /* And don't try to use them on the next "run" command. */
2267 execute_command ("set args", 0);
2270 if (execfile == 0 || exec_bfd == 0)
2271 error ("No executable file specified");
2273 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2275 init_wait_for_inferior ();
2277 /* FIXME: Should we set inferior_pid here? */
2279 proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
2282 /* Clean up after a process. Actually nothing to do. */
2285 mips_mourn_inferior ()
2287 if (current_ops != NULL)
2288 unpush_target (current_ops);
2289 generic_mourn_inferior ();
2292 /* We can write a breakpoint and read the shadow contents in one
2295 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2296 support, we read the contents of the target location and stash it,
2297 then overwrite it with a breakpoint instruction. ADDR is the target
2298 location in the target machine. CONTENTS_CACHE is a pointer to
2299 memory allocated for saving the target contents. It is guaranteed
2300 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2301 is accomplished via BREAKPOINT_MAX). */
2304 mips_insert_breakpoint (addr, contents_cache)
2306 char *contents_cache;
2308 if (monitor_supports_breakpoints)
2309 return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2311 return memory_insert_breakpoint (addr, contents_cache);
2315 mips_remove_breakpoint (addr, contents_cache)
2317 char *contents_cache;
2319 if (monitor_supports_breakpoints)
2320 return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2322 return memory_remove_breakpoint (addr, contents_cache);
2325 #if 0 /* currently not used */
2326 /* PMON does not currently provide support for the debug mode 'b'
2327 commands to manipulate breakpoints. However, if we wanted to use
2328 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2329 then this code performs the work needed to leave debug mode,
2330 set/clear the breakpoint, and then return to debug mode. */
2332 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2333 static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
2334 /* NOTE: The code relies on this vector being zero-initialised by the system */
2337 pmon_insert_breakpoint (addr, contents_cache)
2339 char *contents_cache;
2343 if (monitor_supports_breakpoints)
2345 char tbuff[12]; /* space for breakpoint command */
2349 /* PMON does not support debug level breakpoint set/remove: */
2350 if (mips_exit_debug ())
2351 mips_error ("Failed to exit debug mode");
2353 sprintf (tbuff, "b %08x\r", addr);
2354 mips_send_command (tbuff, 0);
2356 mips_expect ("Bpt ");
2358 if (!mips_getstring (tbuff, 2))
2360 tbuff[2] = '\0'; /* terminate the string */
2361 if (sscanf (tbuff, "%d", &bpnum) != 1)
2363 fprintf_unfiltered (gdb_stderr,
2364 "Invalid decimal breakpoint number from target: %s\n", tbuff);
2368 mips_expect (" = ");
2370 /* Lead in the hex number we are expecting: */
2374 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2375 which targets return 64-bit addresses? PMON returns only 32! */
2376 if (!mips_getstring (&tbuff[2], 8))
2378 tbuff[10] = '\0'; /* terminate the string */
2380 if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
2382 fprintf_unfiltered (gdb_stderr,
2383 "Invalid hex address from target: %s\n", tbuff);
2387 if (bpnum >= PMON_MAX_BP)
2389 fprintf_unfiltered (gdb_stderr,
2390 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2391 bpnum, PMON_MAX_BP - 1);
2396 fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
2398 mips_pmon_bp_info[bpnum] = bpaddr;
2400 mips_expect ("\r\n");
2401 mips_expect (mips_monitor_prompt);
2403 mips_enter_debug ();
2408 return mips_store_word (addr, BREAK_INSN, contents_cache);
2412 pmon_remove_breakpoint (addr, contents_cache)
2414 char *contents_cache;
2416 if (monitor_supports_breakpoints)
2419 char tbuff[7]; /* enough for delete breakpoint command */
2421 for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
2422 if (mips_pmon_bp_info[bpnum] == addr)
2425 if (bpnum >= PMON_MAX_BP)
2427 fprintf_unfiltered (gdb_stderr,
2428 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2433 if (mips_exit_debug ())
2434 mips_error ("Failed to exit debug mode");
2436 sprintf (tbuff, "db %02d\r", bpnum);
2438 mips_send_command (tbuff, -1);
2439 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2440 set" message will be returned. */
2442 mips_enter_debug ();
2447 return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
2452 /* Tell whether this target can support a hardware breakpoint. CNT
2453 is the number of hardware breakpoints already installed. This
2454 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2457 remote_mips_can_use_hardware_watchpoint (cnt)
2460 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2464 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2465 This is used for memory ref breakpoints. */
2467 static unsigned long
2468 calculate_mask (addr, len)
2475 mask = addr ^ (addr + len - 1);
2477 for (i = 32; i >= 0; i--)
2483 mask = (unsigned long) 0xffffffff >> i;
2489 /* Insert a hardware breakpoint. This works only on LSI targets, which
2490 implement ordinary breakpoints using hardware facilities. */
2493 remote_mips_insert_hw_breakpoint (addr, contents_cache)
2495 char *contents_cache;
2497 if (strcmp (target_shortname, "lsi") == 0)
2498 return mips_insert_breakpoint (addr, contents_cache);
2504 /* Remove a hardware breakpoint. This works only on LSI targets, which
2505 implement ordinary breakpoints using hardware facilities. */
2508 remote_mips_remove_hw_breakpoint (addr, contents_cache)
2510 char *contents_cache;
2512 if (strcmp (target_shortname, "lsi") == 0)
2513 return mips_remove_breakpoint (addr, contents_cache);
2518 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2519 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2523 remote_mips_set_watchpoint (addr, len, type)
2528 if (set_breakpoint (addr, len, type))
2535 remote_mips_remove_watchpoint (addr, len, type)
2540 if (clear_breakpoint (addr, len, type))
2547 remote_mips_stopped_by_watchpoint (void)
2549 return hit_watchpoint;
2553 /* Insert a breakpoint. */
2556 set_breakpoint (addr, len, type)
2559 enum break_type type;
2561 return common_breakpoint (1, addr, len, type);
2565 /* Clear a breakpoint. */
2568 clear_breakpoint (addr, len, type)
2571 enum break_type type;
2573 return common_breakpoint (0, addr, len, type);
2577 /* Check the error code from the return packet for an LSI breakpoint
2578 command. If there's no error, just return 0. If it's a warning,
2579 print the warning text and return 0. If it's an error, print
2580 the error text and return 1. <ADDR> is the address of the breakpoint
2581 that was being set. <RERRFLG> is the error code returned by PMON.
2582 This is a helper function for common_breakpoint. */
2585 check_lsi_error (addr, rerrflg)
2589 struct lsi_error *err;
2590 char *saddr = paddr_nz (addr); /* printable address string */
2592 if (rerrflg == 0) /* no error */
2595 /* Warnings can be ORed together, so check them all. */
2596 if (rerrflg & W_WARN)
2598 if (monitor_warnings)
2601 for (err = lsi_warning_table; err->code != 0; err++)
2603 if ((err->code & rerrflg) == err->code)
2606 fprintf_unfiltered (gdb_stderr,
2607 "common_breakpoint (0x%s): Warning: %s\n",
2613 fprintf_unfiltered (gdb_stderr,
2614 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2621 /* Errors are unique, i.e. can't be ORed together. */
2622 for (err = lsi_error_table; err->code != 0; err++)
2624 if ((err->code & rerrflg) == err->code)
2626 fprintf_unfiltered (gdb_stderr,
2627 "common_breakpoint (0x%s): Error: %s\n",
2633 fprintf_unfiltered (gdb_stderr,
2634 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2641 /* This routine sends a breakpoint command to the remote target.
2643 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2644 <ADDR> is the address of the breakpoint.
2645 <LEN> the length of the region to break on.
2646 <TYPE> is the type of breakpoint:
2647 0 = write (BREAK_WRITE)
2648 1 = read (BREAK_READ)
2649 2 = read/write (BREAK_ACCESS)
2650 3 = instruction fetch (BREAK_FETCH)
2652 Return 0 if successful; otherwise 1. */
2655 common_breakpoint (set, addr, len, type)
2659 enum break_type type;
2661 char buf[DATA_MAXLEN + 1];
2663 int rpid, rerrflg, rresponse, rlen;
2666 addr = ADDR_BITS_REMOVE (addr);
2668 if (mips_monitor == MON_LSI)
2670 if (set == 0) /* clear breakpoint */
2672 /* The LSI PMON "clear breakpoint" has this form:
2673 <pid> 'b' <bptn> 0x0
2675 <pid> 'b' 0x0 <code>
2677 <bptn> is a breakpoint number returned by an earlier 'B' command.
2678 Possible return codes: OK, E_BPT. */
2682 /* Search for the breakpoint in the table. */
2683 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2684 if (lsi_breakpoints[i].type == type
2685 && lsi_breakpoints[i].addr == addr
2686 && lsi_breakpoints[i].len == len)
2689 /* Clear the table entry and tell PMON to clear the breakpoint. */
2690 if (i == MAX_LSI_BREAKPOINTS)
2692 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2697 lsi_breakpoints[i].type = BREAK_UNUSED;
2698 sprintf (buf, "0x0 b 0x%x 0x0", i);
2699 mips_send_packet (buf, 1);
2701 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2704 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2706 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2708 return (check_lsi_error (addr, rerrflg));
2711 /* set a breakpoint */
2713 /* The LSI PMON "set breakpoint" command has this form:
2714 <pid> 'B' <addr> 0x0
2716 <pid> 'B' <bptn> <code>
2718 The "set data breakpoint" command has this form:
2720 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2722 where: type= "0x1" = read
2724 "0x3" = access (read or write)
2726 The reply returns two values:
2727 bptn - a breakpoint number, which is a small integer with
2728 possible values of zero through 255.
2729 code - an error return code, a value of zero indicates a
2730 succesful completion, other values indicate various
2731 errors and warnings.
2733 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2737 if (type == BREAK_FETCH) /* instruction breakpoint */
2740 sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr));
2746 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr),
2747 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2748 paddr_nz (addr + len - 1));
2750 mips_send_packet (buf, 1);
2752 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2755 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2756 &rpid, &rcmd, &rresponse, &rerrflg);
2757 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2758 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2761 if (check_lsi_error (addr, rerrflg))
2764 /* rresponse contains PMON's breakpoint number. Record the
2765 information for this breakpoint so we can clear it later. */
2766 lsi_breakpoints[rresponse].type = type;
2767 lsi_breakpoints[rresponse].addr = addr;
2768 lsi_breakpoints[rresponse].len = len;
2775 /* On non-LSI targets, the breakpoint command has this form:
2776 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2777 <MASK> is a don't care mask for addresses.
2778 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2782 mask = calculate_mask (addr, len);
2785 if (set) /* set a breakpoint */
2790 case BREAK_WRITE: /* write */
2793 case BREAK_READ: /* read */
2796 case BREAK_ACCESS: /* read/write */
2799 case BREAK_FETCH: /* fetch */
2807 sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr),
2808 paddr_nz (mask), flags);
2813 sprintf (buf, "0x0 b 0x%s", paddr_nz (addr));
2816 mips_send_packet (buf, 1);
2818 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2821 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2822 &rpid, &rcmd, &rerrflg, &rresponse);
2824 if (nfields != 4 || rcmd != cmd)
2825 mips_error ("common_breakpoint: Bad response from remote board: %s",
2830 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2831 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2832 if (mips_monitor == MON_DDB)
2833 rresponse = rerrflg;
2834 if (rresponse != 22) /* invalid argument */
2835 fprintf_unfiltered (gdb_stderr,
2836 "common_breakpoint (0x%s): Got error: 0x%x\n",
2837 paddr_nz (addr), rresponse);
2845 send_srec (srec, len, addr)
2854 SERIAL_WRITE (mips_desc, srec, len);
2856 ch = mips_readchar (2);
2860 case SERIAL_TIMEOUT:
2861 error ("Timeout during download.");
2865 case 0x15: /* NACK */
2866 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr));
2869 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2874 /* Download a binary file by converting it to S records. */
2877 mips_load_srec (args)
2882 char *buffer, srec[1024];
2884 unsigned int srec_frame = 200;
2886 static int hashmark = 1;
2888 buffer = alloca (srec_frame * 2 + 256);
2890 abfd = bfd_openr (args, 0);
2893 printf_filtered ("Unable to open file %s\n", args);
2897 if (bfd_check_format (abfd, bfd_object) == 0)
2899 printf_filtered ("File is not an object file\n");
2903 /* This actually causes a download in the IDT binary format: */
2904 mips_send_command (LOAD_CMD, 0);
2906 for (s = abfd->sections; s; s = s->next)
2908 if (s->flags & SEC_LOAD)
2910 unsigned int numbytes;
2912 /* FIXME! vma too small????? */
2913 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2915 (long) (s->vma + s->_raw_size));
2916 gdb_flush (gdb_stdout);
2918 for (i = 0; i < s->_raw_size; i += numbytes)
2920 numbytes = min (srec_frame, s->_raw_size - i);
2922 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2924 reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
2925 send_srec (srec, reclen, s->vma + i);
2929 putchar_unfiltered ('#');
2930 gdb_flush (gdb_stdout);
2933 } /* Per-packet (or S-record) loop */
2935 putchar_unfiltered ('\n');
2936 } /* Loadable sections */
2939 putchar_unfiltered ('\n');
2941 /* Write a type 7 terminator record. no data for a type 7, and there
2942 is no data, so len is 0. */
2944 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2946 send_srec (srec, reclen, abfd->start_address);
2948 SERIAL_FLUSH_INPUT (mips_desc);
2952 * mips_make_srec -- make an srecord. This writes each line, one at a
2953 * time, each with it's own header and trailer line.
2954 * An srecord looks like this:
2956 * byte count-+ address
2957 * start ---+ | | data +- checksum
2959 * S01000006F6B692D746573742E73726563E4
2960 * S315000448600000000000000000FC00005900000000E9
2961 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2962 * S30B0004485A0000000000004E
2965 * S<type><length><address><data><checksum>
2969 * is the number of bytes following upto the checksum. Note that
2970 * this is not the number of chars following, since it takes two
2971 * chars to represent a byte.
2975 * 1) two byte address data record
2976 * 2) three byte address data record
2977 * 3) four byte address data record
2978 * 7) four byte address termination record
2979 * 8) three byte address termination record
2980 * 9) two byte address termination record
2983 * is the start address of the data following, or in the case of
2984 * a termination record, the start address of the image
2988 * is the sum of all the raw byte data in the record, from the length
2989 * upwards, modulo 256 and subtracted from 255.
2991 * This routine returns the length of the S-record.
2996 mips_make_srec (buf, type, memaddr, myaddr, len)
3000 unsigned char *myaddr;
3003 unsigned char checksum;
3006 /* Create the header for the srec. addr_size is the number of bytes in the address,
3007 and 1 is the number of bytes in the count. */
3009 /* FIXME!! bigger buf required for 64-bit! */
3012 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
3013 /* This assumes S3 style downloads (4byte addresses). There should
3014 probably be a check, or the code changed to make it more
3016 buf[3] = memaddr >> 24;
3017 buf[4] = memaddr >> 16;
3018 buf[5] = memaddr >> 8;
3020 memcpy (&buf[7], myaddr, len);
3022 /* Note that the checksum is calculated on the raw data, not the
3023 hexified data. It includes the length, address and the data
3024 portions of the packet. */
3026 buf += 2; /* Point at length byte */
3027 for (i = 0; i < len + 4 + 1; i++)
3035 /* The following manifest controls whether we enable the simple flow
3036 control support provided by the monitor. If enabled the code will
3037 wait for an affirmative ACK between transmitting packets. */
3038 #define DOETXACK (1)
3040 /* The PMON fast-download uses an encoded packet format constructed of
3041 3byte data packets (encoded as 4 printable ASCII characters), and
3042 escape sequences (preceded by a '/'):
3045 'C' compare checksum (12bit value, not included in checksum calculation)
3046 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3047 'Z' zero fill multiple of 3bytes
3048 'B' byte (12bit encoded value, of 8bit data)
3049 'A' address (36bit encoded value)
3050 'E' define entry as original address, and exit load
3052 The packets are processed in 4 character chunks, so the escape
3053 sequences that do not have any data (or variable length data)
3054 should be padded to a 4 character boundary. The decoder will give
3055 an error if the complete message block size is not a multiple of
3056 4bytes (size of record).
3058 The encoding of numbers is done in 6bit fields. The 6bit value is
3059 used to index into this string to get the specific character
3060 encoding for the value: */
3061 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3063 /* Convert the number of bits required into an encoded number, 6bits
3064 at a time (range 0..63). Keep a checksum if required (passed
3065 pointer non-NULL). The function returns the number of encoded
3066 characters written into the buffer. */
3068 pmon_makeb64 (v, p, n, chksum)
3074 int count = (n / 6);
3078 fprintf_unfiltered (gdb_stderr,
3079 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
3084 fprintf_unfiltered (gdb_stderr,
3085 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
3089 /* Deal with the checksum: */
3095 *chksum += ((v >> 24) & 0xFFF);
3097 *chksum += ((v >> 12) & 0xFFF);
3099 *chksum += ((v >> 0) & 0xFFF);
3106 *p++ = encoding[(v >> n) & 0x3F];
3113 /* Shorthand function (that could be in-lined) to output the zero-fill
3114 escape sequence into the data stream. */
3116 pmon_zeroset (recsize, buff, amount, chksum)
3120 unsigned int *chksum;
3124 sprintf (*buff, "/Z");
3125 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3126 *buff += (count + 2);
3128 return (recsize + count + 2);
3132 pmon_checkset (recsize, buff, value)
3139 /* Add the checksum (without updating the value): */
3140 sprintf (*buff, "/C");
3141 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3142 *buff += (count + 2);
3143 sprintf (*buff, "\n");
3144 *buff += 2; /* include zero terminator */
3145 /* Forcing a checksum validation clears the sum: */
3147 return (recsize + count + 3);
3150 /* Amount of padding we leave after at the end of the output buffer,
3151 for the checksum and line termination characters: */
3152 #define CHECKSIZE (4 + 4 + 4 + 2)
3153 /* zero-fill, checksum, transfer end and line termination space. */
3155 /* The amount of binary data loaded from the object file in a single
3157 #define BINCHUNK (1024)
3159 /* Maximum line of data accepted by the monitor: */
3160 #define MAXRECSIZE (550)
3161 /* NOTE: This constant depends on the monitor being used. This value
3162 is for PMON 5.x on the Cogent Vr4300 board. */
3165 pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill)
3167 unsigned char *inbuf;
3172 unsigned int *zerofill;
3177 /* This is a simple check to ensure that our data will fit within
3178 the maximum allowable record size. Each record output is 4bytes
3179 in length. We must allow space for a pending zero fill command,
3180 the record, and a checksum record. */
3181 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3183 /* Process the binary data: */
3184 if ((inamount - *inptr) < 3)
3187 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3189 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3191 *recsize += (2 + count);
3196 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3197 /* Simple check for zero data. TODO: A better check would be
3198 to check the last, and then the middle byte for being zero
3199 (if the first byte is not). We could then check for
3200 following runs of zeros, and if above a certain size it is
3201 worth the 4 or 8 character hit of the byte insertions used
3202 to pad to the start of the zeroes. NOTE: This also depends
3203 on the alignment at the end of the zero run. */
3204 if (value == 0x00000000)
3207 if (*zerofill == 0xFFF) /* 12bit counter */
3208 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3213 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3214 count = pmon_makeb64 (value, p, 24, csum);
3227 pmon_check_ack (mesg)
3230 #if defined(DOETXACK)
3235 c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc, 2);
3236 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3238 fprintf_unfiltered (gdb_stderr,
3239 "Failed to receive valid ACK for %s\n", mesg);
3240 return (-1); /* terminate the download */
3243 #endif /* DOETXACK */
3247 /* pmon_download - Send a sequence of characters to the PMON download port,
3248 which is either a serial port or a UDP socket. */
3251 pmon_start_download ()
3255 /* Create the temporary download file. */
3256 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3257 perror_with_name (tftp_localname);
3261 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3262 mips_expect ("Downloading from ");
3263 mips_expect (udp_in_use ? "udp" : "tty0");
3264 mips_expect (", ^C to abort\r\n");
3269 mips_expect_download (char *string)
3271 if (!mips_expect (string))
3273 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3275 remove (tftp_localname); /* Remove temporary file */
3283 pmon_end_download (final, bintotal)
3287 char hexnumber[9]; /* includes '\0' space */
3291 static char *load_cmd_prefix = "load -b -s ";
3295 /* Close off the temporary file containing the load data. */
3299 /* Make the temporary file readable by the world. */
3300 if (stat (tftp_localname, &stbuf) == 0)
3301 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3303 /* Must reinitialize the board to prevent PMON from crashing. */
3304 mips_send_command ("initEther\r", -1);
3306 /* Send the load command. */
3307 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3308 strcpy (cmd, load_cmd_prefix);
3309 strcat (cmd, tftp_name);
3311 mips_send_command (cmd, 0);
3313 if (!mips_expect_download ("Downloading from "))
3315 if (!mips_expect_download (tftp_name))
3317 if (!mips_expect_download (", ^C to abort\r\n"))
3321 /* Wait for the stuff that PMON prints after the load has completed.
3322 The timeout value for use in the tftp case (15 seconds) was picked
3323 arbitrarily but might be too small for really large downloads. FIXME. */
3324 if (mips_monitor == MON_LSI)
3326 pmon_check_ack ("termination");
3327 mips_expect_timeout ("Entry address is ", tftp_in_use ? 15 : 2);
3330 mips_expect_timeout ("Entry Address = ", tftp_in_use ? 15 : 2);
3332 sprintf (hexnumber, "%x", final);
3333 mips_expect (hexnumber);
3334 mips_expect ("\r\n");
3335 if (mips_monitor != MON_LSI)
3336 pmon_check_ack ("termination");
3337 mips_expect ("\r\ntotal = 0x");
3338 sprintf (hexnumber, "%x", bintotal);
3339 mips_expect (hexnumber);
3340 if (!mips_expect_download (" bytes\r\n"))
3344 remove (tftp_localname); /* Remove temporary file */
3348 pmon_download (buffer, length)
3353 fwrite (buffer, 1, length, tftp_file);
3355 SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length);
3359 pmon_load_fast (file)
3364 unsigned char *binbuf;
3367 unsigned int csum = 0;
3368 int hashmark = !tftp_in_use;
3373 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3374 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3376 abfd = bfd_openr (file, 0);
3379 printf_filtered ("Unable to open file %s\n", file);
3383 if (bfd_check_format (abfd, bfd_object) == 0)
3385 printf_filtered ("File is not an object file\n");
3389 /* Setup the required download state: */
3390 mips_send_command ("set dlproto etxack\r", -1);
3391 mips_send_command ("set dlecho off\r", -1);
3392 /* NOTE: We get a "cannot set variable" message if the variable is
3393 already defined to have the argument we give. The code doesn't
3394 care, since it just scans to the next prompt anyway. */
3395 /* Start the download: */
3396 pmon_start_download ();
3398 /* Zero the checksum */
3399 sprintf (buffer, "/Kxx\n");
3400 reclen = strlen (buffer);
3401 pmon_download (buffer, reclen);
3402 finished = pmon_check_ack ("/Kxx");
3404 for (s = abfd->sections; s && !finished; s = s->next)
3405 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3407 bintotal += s->_raw_size;
3408 final = (s->vma + s->_raw_size);
3410 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3411 (unsigned int) (s->vma + s->_raw_size));
3412 gdb_flush (gdb_stdout);
3414 /* Output the starting address */
3415 sprintf (buffer, "/A");
3416 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3417 buffer[2 + reclen] = '\n';
3418 buffer[3 + reclen] = '\0';
3419 reclen += 3; /* for the initial escape code and carriage return */
3420 pmon_download (buffer, reclen);
3421 finished = pmon_check_ack ("/A");
3425 unsigned int binamount;
3426 unsigned int zerofill = 0;
3432 for (i = 0; ((i < s->_raw_size) && !finished); i += binamount)
3436 binamount = min (BINCHUNK, s->_raw_size - i);
3438 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3440 /* This keeps a rolling checksum, until we decide to output
3442 for (; ((binamount - binptr) > 0);)
3444 pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
3445 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3447 reclen = pmon_checkset (reclen, &bp, &csum);
3448 pmon_download (buffer, reclen);
3449 finished = pmon_check_ack ("data record");
3452 zerofill = 0; /* do not transmit pending zerofills */
3458 putchar_unfiltered ('#');
3459 gdb_flush (gdb_stdout);
3463 reclen = 0; /* buffer processed */
3468 /* Ensure no out-standing zerofill requests: */
3470 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3472 /* and then flush the line: */
3475 reclen = pmon_checkset (reclen, &bp, &csum);
3476 /* Currently pmon_checkset outputs the line terminator by
3477 default, so we write out the buffer so far: */
3478 pmon_download (buffer, reclen);
3479 finished = pmon_check_ack ("record remnant");
3483 putchar_unfiltered ('\n');
3486 /* Terminate the transfer. We know that we have an empty output
3487 buffer at this point. */
3488 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3489 reclen = strlen (buffer);
3490 pmon_download (buffer, reclen);
3493 { /* Ignore the termination message: */
3494 SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc);
3497 { /* Deal with termination message: */
3498 pmon_end_download (final, bintotal);
3504 /* mips_load -- download a file. */
3507 mips_load (file, from_tty)
3511 /* Get the board out of remote debugging mode. */
3512 if (mips_exit_debug ())
3513 error ("mips_load: Couldn't get into monitor mode.");
3515 if (mips_monitor != MON_IDT)
3516 pmon_load_fast (file);
3518 mips_load_srec (file);
3522 /* Finally, make the PC point at the start address */
3523 if (mips_monitor != MON_IDT)
3525 /* Work around problem where PMON monitor updates the PC after a load
3526 to a different value than GDB thinks it has. The following ensures
3527 that the write_pc() WILL update the PC value: */
3528 register_valid[PC_REGNUM] = 0;
3531 write_pc (bfd_get_start_address (exec_bfd));
3533 inferior_pid = 0; /* No process now */
3535 /* This is necessary because many things were based on the PC at the time that
3536 we attached to the monitor, which is no longer valid now that we have loaded
3537 new code (and just changed the PC). Another way to do this might be to call
3538 normal_stop, except that the stack may not be valid, and things would get
3539 horribly confused... */
3541 clear_symtab_users ();
3545 /* Pass the command argument as a packet to PMON verbatim. */
3548 pmon_command (args, from_tty)
3552 char buf[DATA_MAXLEN + 1];
3555 sprintf (buf, "0x0 %s", args);
3556 mips_send_packet (buf, 1);
3557 printf_filtered ("Send packet: %s\n", buf);
3559 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3561 printf_filtered ("Received packet: %s\n", buf);
3565 _initialize_remote_mips ()
3567 /* Initialize the fields in mips_ops that are common to all four targets. */
3568 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3569 mips_ops.to_close = mips_close;
3570 mips_ops.to_detach = mips_detach;
3571 mips_ops.to_resume = mips_resume;
3572 mips_ops.to_fetch_registers = mips_fetch_registers;
3573 mips_ops.to_store_registers = mips_store_registers;
3574 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3575 mips_ops.to_xfer_memory = mips_xfer_memory;
3576 mips_ops.to_files_info = mips_files_info;
3577 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3578 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3579 mips_ops.to_kill = mips_kill;
3580 mips_ops.to_load = mips_load;
3581 mips_ops.to_create_inferior = mips_create_inferior;
3582 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3583 mips_ops.to_stratum = process_stratum;
3584 mips_ops.to_has_all_memory = 1;
3585 mips_ops.to_has_memory = 1;
3586 mips_ops.to_has_stack = 1;
3587 mips_ops.to_has_registers = 1;
3588 mips_ops.to_has_execution = 1;
3589 mips_ops.to_magic = OPS_MAGIC;
3591 /* Copy the common fields to all four target vectors. */
3592 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3594 /* Initialize target-specific fields in the target vectors. */
3595 mips_ops.to_shortname = "mips";
3596 mips_ops.to_doc = "\
3597 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3598 The argument is the device it is connected to or, if it contains a colon,\n\
3599 HOST:PORT to access a board over a network";
3600 mips_ops.to_open = mips_open;
3601 mips_ops.to_wait = mips_wait;
3603 pmon_ops.to_shortname = "pmon";
3604 pmon_ops.to_doc = "\
3605 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3606 line. The argument is the device it is connected to or, if it contains a\n\
3607 colon, HOST:PORT to access a board over a network";
3608 pmon_ops.to_open = pmon_open;
3609 pmon_ops.to_wait = mips_wait;
3611 ddb_ops.to_shortname = "ddb";
3613 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3614 line. The first argument is the device it is connected to or, if it contains\n\
3615 a colon, HOST:PORT to access a board over a network. The optional second\n\
3616 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3617 TFTP downloads to the board. The optional third parameter is the local name\n\
3618 of the TFTP temporary file, if it differs from the filename seen by the board.";
3619 ddb_ops.to_open = ddb_open;
3620 ddb_ops.to_wait = mips_wait;
3622 lsi_ops.to_shortname = "lsi";
3623 lsi_ops.to_doc = pmon_ops.to_doc;
3624 lsi_ops.to_open = lsi_open;
3625 lsi_ops.to_wait = mips_wait;
3627 /* Add the targets. */
3628 add_target (&mips_ops);
3629 add_target (&pmon_ops);
3630 add_target (&ddb_ops);
3631 add_target (&lsi_ops);
3634 add_set_cmd ("timeout", no_class, var_zinteger,
3635 (char *) &mips_receive_wait,
3636 "Set timeout in seconds for remote MIPS serial I/O.",
3641 add_set_cmd ("retransmit-timeout", no_class, var_zinteger,
3642 (char *) &mips_retransmit_wait,
3643 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3644 This is the number of seconds to wait for an acknowledgement to a packet\n\
3645 before resending the packet.", &setlist),
3649 add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
3650 (char *) &mips_syn_garbage,
3651 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3652 This is the maximum number of characters GDB will ignore when trying to\n\
3653 synchronize with the remote system. A value of -1 means that there is no limit\n\
3654 (Note that these characters are printed out even though they are ignored.)",
3659 (add_set_cmd ("monitor-prompt", class_obscure, var_string,
3660 (char *) &mips_monitor_prompt,
3661 "Set the prompt that GDB expects from the monitor.",
3666 add_set_cmd ("monitor-warnings", class_obscure, var_zinteger,
3667 (char *) &monitor_warnings,
3668 "Set printing of monitor warnings.\n"
3669 "When enabled, monitor warnings about hardware breakpoints "
3670 "will be displayed.",
3674 add_com ("pmon <command>", class_obscure, pmon_command,
3675 "Send a packet to PMON (must be in debug mode).");