1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #include "remote-utils.h"
32 #include "gdb_string.h"
35 #include <sys/types.h>
37 #ifdef ANSI_PROTOTYPES
43 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
45 #define S_IROTH S_IREAD
48 extern void mips_set_processor_type_command PARAMS ((char *, int));
51 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
52 types passed by breakpoint.c to target_insert_watchpoint.
53 Value 3 is our own invention, and is used for ordinary instruction
54 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
63 /* Prototypes for local functions. */
65 static int mips_readchar PARAMS ((int timeout));
67 static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage,
68 int ch, int timeout));
70 static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage,
71 int *pch, int timeout));
73 static int mips_cksum PARAMS ((const unsigned char *hdr,
74 const unsigned char *data,
77 static void mips_send_packet PARAMS ((const char *s, int get_ack));
79 static void mips_send_command PARAMS ((const char *cmd, int prompt));
81 static int mips_receive_packet PARAMS ((char *buff, int throw_error,
84 static CORE_ADDR mips_request PARAMS ((int cmd, CORE_ADDR addr,
85 CORE_ADDR data, int *perr, int timeout,
88 static void mips_initialize PARAMS ((void));
90 static void mips_open PARAMS ((char *name, int from_tty));
92 static void pmon_open PARAMS ((char *name, int from_tty));
94 static void ddb_open PARAMS ((char *name, int from_tty));
96 static void lsi_open PARAMS ((char *name, int from_tty));
98 static void mips_close PARAMS ((int quitting));
100 static void mips_detach PARAMS ((char *args, int from_tty));
102 static void mips_resume PARAMS ((int pid, int step,
103 enum target_signal siggnal));
105 static int mips_wait PARAMS ((int pid, struct target_waitstatus *status));
107 static int mips_map_regno PARAMS ((int regno));
109 static void mips_fetch_registers PARAMS ((int regno));
111 static void mips_prepare_to_store PARAMS ((void));
113 static void mips_store_registers PARAMS ((int regno));
115 static unsigned int mips_fetch_word PARAMS ((CORE_ADDR addr));
117 static int mips_store_word PARAMS ((CORE_ADDR addr, unsigned int value,
118 char *old_contents));
120 static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
121 int write, struct target_ops *ignore));
123 static void mips_files_info PARAMS ((struct target_ops *ignore));
125 static void mips_create_inferior PARAMS ((char *execfile, char *args,
128 static void mips_mourn_inferior PARAMS ((void));
130 static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum));
132 static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount,
133 unsigned int *chksum));
135 static int pmon_checkset PARAMS ((int recsize, char **buff, int *value));
137 static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf,
138 int *inptr, int inamount, int *recsize,
139 unsigned int *csum, unsigned int *zerofill));
141 static int pmon_check_ack PARAMS ((char *mesg));
143 static void pmon_start_download PARAMS ((void));
145 static void pmon_end_download PARAMS ((int final, int bintotal));
147 static void pmon_download PARAMS ((char *buffer, int length));
149 static void pmon_load_fast PARAMS ((char *file));
151 static void mips_load PARAMS ((char *file, int from_tty));
153 static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr,
154 unsigned char *myaddr, int len));
156 static int set_breakpoint PARAMS ((CORE_ADDR addr, int len,
157 enum break_type type));
159 static int clear_breakpoint PARAMS ((CORE_ADDR addr, int len,
160 enum break_type type));
162 static int common_breakpoint PARAMS ((int set, CORE_ADDR addr, int len,
163 enum break_type type));
165 /* Forward declarations. */
166 extern struct target_ops mips_ops;
167 extern struct target_ops pmon_ops;
168 extern struct target_ops ddb_ops;
170 /* The MIPS remote debugging interface is built on top of a simple
171 packet protocol. Each packet is organized as follows:
173 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
174 may not appear anywhere else in the packet. Any time a SYN is
175 seen, a new packet should be assumed to have begun.
178 This byte contains the upper five bits of the logical length
179 of the data section, plus a single bit indicating whether this
180 is a data packet or an acknowledgement. The documentation
181 indicates that this bit is 1 for a data packet, but the actual
182 board uses 1 for an acknowledgement. The value of the byte is
183 0x40 + (ack ? 0x20 : 0) + (len >> 6)
184 (we always have 0 <= len < 1024). Acknowledgement packets do
185 not carry data, and must have a data length of 0.
187 LEN1 This byte contains the lower six bits of the logical length of
188 the data section. The value is
191 SEQ This byte contains the six bit sequence number of the packet.
194 An acknowlegment packet contains the sequence number of the
195 packet being acknowledged plus 1 modulo 64. Data packets are
196 transmitted in sequence. There may only be one outstanding
197 unacknowledged data packet at a time. The sequence numbers
198 are independent in each direction. If an acknowledgement for
199 the previous packet is received (i.e., an acknowledgement with
200 the sequence number of the packet just sent) the packet just
201 sent should be retransmitted. If no acknowledgement is
202 received within a timeout period, the packet should be
203 retransmitted. This has an unfortunate failure condition on a
204 high-latency line, as a delayed acknowledgement may lead to an
205 endless series of duplicate packets.
207 DATA The actual data bytes follow. The following characters are
208 escaped inline with DLE (ASCII 020, or ^P):
214 The additional DLE characters are not counted in the logical
215 length stored in the TYPE_LEN and LEN1 bytes.
220 These bytes contain an 18 bit checksum of the complete
221 contents of the packet excluding the SEQ byte and the
222 CSUM[123] bytes. The checksum is simply the twos complement
223 addition of all the bytes treated as unsigned characters. The
224 values of the checksum bytes are:
225 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
226 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
227 CSUM3: 0x40 + (cksum & 0x3f)
229 It happens that the MIPS remote debugging protocol always
230 communicates with ASCII strings. Because of this, this
231 implementation doesn't bother to handle the DLE quoting mechanism,
232 since it will never be required. */
234 /* The SYN character which starts each packet. */
237 /* The 0x40 used to offset each packet (this value ensures that all of
238 the header and trailer bytes, other than SYN, are printable ASCII
240 #define HDR_OFFSET 0x40
242 /* The indices of the bytes in the packet header. */
243 #define HDR_INDX_SYN 0
244 #define HDR_INDX_TYPE_LEN 1
245 #define HDR_INDX_LEN1 2
246 #define HDR_INDX_SEQ 3
249 /* The data/ack bit in the TYPE_LEN header byte. */
250 #define TYPE_LEN_DA_BIT 0x20
251 #define TYPE_LEN_DATA 0
252 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
254 /* How to compute the header bytes. */
255 #define HDR_SET_SYN(data, len, seq) (SYN)
256 #define HDR_SET_TYPE_LEN(data, len, seq) \
258 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
259 + (((len) >> 6) & 0x1f))
260 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
261 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
263 /* Check that a header byte is reasonable. */
264 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
266 /* Get data from the header. These macros evaluate their argument
268 #define HDR_IS_DATA(hdr) \
269 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
270 #define HDR_GET_LEN(hdr) \
271 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
272 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
274 /* The maximum data length. */
275 #define DATA_MAXLEN 1023
277 /* The trailer offset. */
278 #define TRLR_OFFSET HDR_OFFSET
280 /* The indices of the bytes in the packet trailer. */
281 #define TRLR_INDX_CSUM1 0
282 #define TRLR_INDX_CSUM2 1
283 #define TRLR_INDX_CSUM3 2
284 #define TRLR_LENGTH 3
286 /* How to compute the trailer bytes. */
287 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
288 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
289 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
291 /* Check that a trailer byte is reasonable. */
292 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
294 /* Get data from the trailer. This evaluates its argument multiple
296 #define TRLR_GET_CKSUM(trlr) \
297 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
298 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
299 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
301 /* The sequence number modulos. */
302 #define SEQ_MODULOS (64)
304 /* PMON commands to load from the serial port or UDP socket. */
305 #define LOAD_CMD "load -b -s tty0\r"
306 #define LOAD_CMD_UDP "load -b -s udp\r"
308 /* The target vectors for the four different remote MIPS targets.
309 These are initialized with code in _initialize_remote_mips instead
310 of static initializers, to make it easier to extend the target_ops
312 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
314 enum mips_monitor_type {
315 /* IDT/SIM monitor being used: */
317 /* PMON monitor being used: */
318 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
319 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
320 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
321 /* Last and unused value, for sizing vectors, etc. */
324 static enum mips_monitor_type mips_monitor = MON_LAST;
326 /* The monitor prompt text. If the user sets the PMON prompt
327 to some new value, the GDB `set monitor-prompt' command must also
328 be used to inform GDB about the expected prompt. Otherwise, GDB
329 will not be able to connect to PMON in mips_initialize().
330 If the `set monitor-prompt' command is not used, the expected
331 default prompt will be set according the target:
338 static char *mips_monitor_prompt;
340 /* Set to 1 if the target is open. */
341 static int mips_is_open;
343 /* Currently active target description (if mips_is_open == 1) */
344 static struct target_ops *current_ops;
346 /* Set to 1 while the connection is being initialized. */
347 static int mips_initializing;
349 /* Set to 1 while the connection is being brought down. */
350 static int mips_exiting;
352 /* The next sequence number to send. */
353 static unsigned int mips_send_seq;
355 /* The next sequence number we expect to receive. */
356 static unsigned int mips_receive_seq;
358 /* The time to wait before retransmitting a packet, in seconds. */
359 static int mips_retransmit_wait = 3;
361 /* The number of times to try retransmitting a packet before giving up. */
362 static int mips_send_retries = 10;
364 /* The number of garbage characters to accept when looking for an
365 SYN for the next packet. */
366 static int mips_syn_garbage = 1050;
368 /* The time to wait for a packet, in seconds. */
369 static int mips_receive_wait = 5;
371 /* Set if we have sent a packet to the board but have not yet received
373 static int mips_need_reply = 0;
375 /* Handle used to access serial I/O stream. */
376 static serial_t mips_desc;
378 /* UDP handle used to download files to target. */
379 static serial_t udp_desc;
380 static int udp_in_use;
382 /* TFTP filename used to download files to DDB board, in the form
384 static char *tftp_name; /* host:filename */
385 static char *tftp_localname; /* filename portion of above */
386 static int tftp_in_use;
387 static FILE *tftp_file;
389 /* Counts the number of times the user tried to interrupt the target (usually
391 static int interrupt_count;
393 /* If non-zero, means that the target is running. */
394 static int mips_wait_flag = 0;
396 /* If non-zero, monitor supports breakpoint commands. */
397 static monitor_supports_breakpoints = 0;
399 /* Data cache header. */
401 #if 0 /* not used (yet?) */
402 static DCACHE *mips_dcache;
405 /* Non-zero means that we've just hit a read or write watchpoint */
406 static int hit_watchpoint;
408 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
409 The table is indexed by a breakpoint number, which is an integer
410 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
412 #define MAX_LSI_BREAKPOINTS 256
413 struct lsi_breakpoint_info
415 enum break_type type; /* type of breakpoint */
416 CORE_ADDR addr; /* address of breakpoint */
417 int len; /* length of region being watched */
418 unsigned long value; /* value to watch */
419 } lsi_breakpoints [MAX_LSI_BREAKPOINTS];
421 /* Error/warning codes returned by LSI PMON for breakpoint commands.
422 Warning values may be ORed together; error values may not. */
423 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
424 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
425 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
426 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
428 #define E_ERR 0x200 /* This bit is set if the error code is an error */
429 #define E_BPT 0x200 /* error: No such breakpoint number */
430 #define E_RGE 0x201 /* error: Range is not supported */
431 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
432 #define E_OUT 0x203 /* error: Out of hardware resources */
433 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
437 int code; /* error code */
438 char *string; /* string associated with this code */
441 struct lsi_error lsi_warning_table[] =
443 { W_MSK, "Range feature is supported via mask" },
444 { W_VAL, "Value check is not supported in hardware" },
445 { W_QAL, "Requested qualifiers are not supported in hardware" },
449 struct lsi_error lsi_error_table[] =
451 { E_BPT, "No such breakpoint number" },
452 { E_RGE, "Range is not supported" },
453 { E_QAL, "The requested qualifiers can not be used" },
454 { E_OUT, "Out of hardware resources" },
455 { E_NON, "Hardware breakpoint not supported" },
459 /* Set to 1 with the 'set monitor-warnings' command to enable printing
460 of warnings returned by PMON when hardware breakpoints are used. */
461 static int monitor_warnings;
468 SERIAL_CLOSE (mips_desc);
472 SERIAL_CLOSE (udp_desc);
478 /* Handle low-level error that we can't recover from. Note that just
479 error()ing out from target_wait or some such low-level place will cause
480 all hell to break loose--the rest of GDB will tend to get left in an
481 inconsistent state. */
484 #ifdef ANSI_PROTOTYPES
485 mips_error (char *string, ...)
487 mips_error (va_alist)
493 #ifdef ANSI_PROTOTYPES
494 va_start (args, string);
498 string = va_arg (args, char *);
501 target_terminal_ours ();
502 wrap_here(""); /* Force out any buffered output */
503 gdb_flush (gdb_stdout);
505 fprintf_filtered (gdb_stderr, error_pre_print);
506 vfprintf_filtered (gdb_stderr, string, args);
507 fprintf_filtered (gdb_stderr, "\n");
509 gdb_flush (gdb_stderr);
511 /* Clean up in such a way that mips_close won't try to talk to the
512 board (it almost surely won't work since we weren't able to talk to
516 printf_unfiltered ("Ending remote MIPS debugging.\n");
517 target_mourn_inferior ();
519 return_to_top_level (RETURN_ERROR);
522 /* putc_readable - print a character, displaying non-printable chars in
523 ^x notation or in hex. */
530 putchar_unfiltered ('\n');
532 printf_unfiltered ("\\r");
533 else if (ch < 0x20) /* ASCII control character */
534 printf_unfiltered ("^%c", ch + '@');
535 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
536 printf_unfiltered ("[%02x]", ch & 0xff);
538 putchar_unfiltered (ch);
542 /* puts_readable - print a string, displaying non-printable chars in
543 ^x notation or in hex. */
546 puts_readable (string)
551 while ((c = *string++) != '\0')
556 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
557 timed out. TIMEOUT specifies timeout value in seconds.
561 mips_expect_timeout (string, timeout)
569 printf_unfiltered ("Expected \"");
570 puts_readable (string);
571 printf_unfiltered ("\", got \"");
579 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
580 were waiting for the mips_monitor_prompt... */
582 c = SERIAL_READCHAR (mips_desc, timeout);
584 if (c == SERIAL_TIMEOUT)
587 printf_unfiltered ("\": FAIL\n");
600 printf_unfiltered ("\": OK\n");
613 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
614 timed out. The timeout value is hard-coded to 2 seconds. Use
615 mips_expect_timeout if a different timeout value is needed.
622 return mips_expect_timeout (string, 2);
625 /* Read the required number of characters into the given buffer (which
626 is assumed to be large enough). The only failure is a timeout. */
628 mips_getstring (string, n)
638 c = SERIAL_READCHAR (mips_desc, 2);
640 if (c == SERIAL_TIMEOUT) {
641 fprintf_unfiltered (gdb_stderr,
642 "Failed to read %d characters from target (TIMEOUT)\n", n);
653 /* Read a character from the remote, aborting on error. Returns
654 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
655 returns). FIXME: If we see the string mips_monitor_prompt from
656 the board, then we are debugging on the main console port, and we
657 have somehow dropped out of remote debugging mode. In this case,
658 we automatically go back in to remote debugging mode. This is a
659 hack, put in because I can't find any way for a program running on
660 the remote board to terminate without also ending remote debugging
661 mode. I assume users won't have any trouble with this; for one
662 thing, the IDT documentation generally assumes that the remote
663 debugging port is not the console port. This is, however, very
664 convenient for DejaGnu when you only have one connected serial
668 mips_readchar (timeout)
672 static int state = 0;
673 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
675 #ifdef MAINTENANCE_CMDS
680 if (i == -1 && watchdog > 0)
685 if (state == mips_monitor_prompt_len)
687 ch = SERIAL_READCHAR (mips_desc, timeout);
688 #ifdef MAINTENANCE_CMDS
689 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
691 target_mourn_inferior ();
692 error ("Watchdog has expired. Target detached.\n");
695 if (ch == SERIAL_EOF)
696 mips_error ("End of file from remote");
697 if (ch == SERIAL_ERROR)
698 mips_error ("Error reading from remote: %s", safe_strerror (errno));
699 if (remote_debug > 1)
701 /* Don't use _filtered; we can't deal with a QUIT out of
702 target_wait, and I think this might be called from there. */
703 if (ch != SERIAL_TIMEOUT)
704 printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch);
706 printf_unfiltered ("Timed out in read\n");
709 /* If we have seen mips_monitor_prompt and we either time out, or
710 we see a @ (which was echoed from a packet we sent), reset the
711 board as described above. The first character in a packet after
712 the SYN (which is not echoed) is always an @ unless the packet is
713 more than 64 characters long, which ours never are. */
714 if ((ch == SERIAL_TIMEOUT || ch == '@')
715 && state == mips_monitor_prompt_len
716 && ! mips_initializing
719 if (remote_debug > 0)
720 /* Don't use _filtered; we can't deal with a QUIT out of
721 target_wait, and I think this might be called from there. */
722 printf_unfiltered ("Reinitializing MIPS debugging mode\n");
729 /* At this point, about the only thing we can do is abort the command
730 in progress and get back to command level as quickly as possible. */
732 error ("Remote board reset, debug protocol re-initialized.");
735 if (ch == mips_monitor_prompt[state])
743 /* Get a packet header, putting the data in the supplied buffer.
744 PGARBAGE is a pointer to the number of garbage characters received
745 so far. CH is the last character received. Returns 0 for success,
746 or -1 for timeout. */
749 mips_receive_header (hdr, pgarbage, ch, timeout)
759 /* Wait for a SYN. mips_syn_garbage is intended to prevent
760 sitting here indefinitely if the board sends us one garbage
761 character per second. ch may already have a value from the
762 last time through the loop. */
765 ch = mips_readchar (timeout);
766 if (ch == SERIAL_TIMEOUT)
770 /* Printing the character here lets the user of gdb see
771 what the program is outputting, if the debugging is
772 being done on the console port. Don't use _filtered;
773 we can't deal with a QUIT out of target_wait. */
774 if (! mips_initializing || remote_debug > 0)
777 gdb_flush (gdb_stdout);
781 if (mips_syn_garbage > 0
782 && *pgarbage > mips_syn_garbage)
783 mips_error ("Debug protocol failure: more than %d characters before a sync.",
788 /* Get the packet header following the SYN. */
789 for (i = 1; i < HDR_LENGTH; i++)
791 ch = mips_readchar (timeout);
792 if (ch == SERIAL_TIMEOUT)
794 /* Make sure this is a header byte. */
795 if (ch == SYN || ! HDR_CHECK (ch))
801 /* If we got the complete header, we can return. Otherwise we
802 loop around and keep looking for SYN. */
808 /* Get a packet header, putting the data in the supplied buffer.
809 PGARBAGE is a pointer to the number of garbage characters received
810 so far. The last character read is returned in *PCH. Returns 0
811 for success, -1 for timeout, -2 for error. */
814 mips_receive_trailer (trlr, pgarbage, pch, timeout)
823 for (i = 0; i < TRLR_LENGTH; i++)
825 ch = mips_readchar (timeout);
827 if (ch == SERIAL_TIMEOUT)
829 if (! TRLR_CHECK (ch))
836 /* Get the checksum of a packet. HDR points to the packet header.
837 DATA points to the packet data. LEN is the length of DATA. */
840 mips_cksum (hdr, data, len)
841 const unsigned char *hdr;
842 const unsigned char *data;
845 register const unsigned char *p;
851 /* The initial SYN is not included in the checksum. */
865 /* Send a packet containing the given ASCII string. */
868 mips_send_packet (s, get_ack)
872 /* unsigned */ int len;
873 unsigned char *packet;
878 if (len > DATA_MAXLEN)
879 mips_error ("MIPS protocol data packet too long: %s", s);
881 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
883 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
884 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
885 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
886 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
888 memcpy (packet + HDR_LENGTH, s, len);
890 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
891 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
892 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
893 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
895 /* Increment the sequence number. This will set mips_send_seq to
896 the sequence number we expect in the acknowledgement. */
897 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
899 /* We can only have one outstanding data packet, so we just wait for
900 the acknowledgement here. Keep retransmitting the packet until
901 we get one, or until we've tried too many times. */
902 for (try = 0; try < mips_send_retries; try++)
907 if (remote_debug > 0)
909 /* Don't use _filtered; we can't deal with a QUIT out of
910 target_wait, and I think this might be called from there. */
911 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
912 printf_unfiltered ("Writing \"%s\"\n", packet + 1);
915 if (SERIAL_WRITE (mips_desc, packet,
916 HDR_LENGTH + len + TRLR_LENGTH) != 0)
917 mips_error ("write to target failed: %s", safe_strerror (errno));
926 unsigned char hdr[HDR_LENGTH + 1];
927 unsigned char trlr[TRLR_LENGTH + 1];
931 /* Get the packet header. If we time out, resend the data
933 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
939 /* If we get a data packet, assume it is a duplicate and
940 ignore it. FIXME: If the acknowledgement is lost, this
941 data packet may be the packet the remote sends after the
943 if (HDR_IS_DATA (hdr)) {
946 /* Ignore any errors raised whilst attempting to ignore
949 len = HDR_GET_LEN (hdr);
951 for (i = 0; i < len; i++)
955 rch = mips_readchar (2);
961 if (rch == SERIAL_TIMEOUT)
963 /* ignore the character */
967 (void) mips_receive_trailer (trlr, &garbage, &ch, 2);
969 /* We don't bother checking the checksum, or providing an
970 ACK to the packet. */
974 /* If the length is not 0, this is a garbled packet. */
975 if (HDR_GET_LEN (hdr) != 0)
978 /* Get the packet trailer. */
979 err = mips_receive_trailer (trlr, &garbage, &ch,
980 mips_retransmit_wait);
982 /* If we timed out, resend the data packet. */
986 /* If we got a bad character, reread the header. */
990 /* If the checksum does not match the trailer checksum, this
991 is a bad packet; ignore it. */
992 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
993 != TRLR_GET_CKSUM (trlr))
996 if (remote_debug > 0)
998 hdr[HDR_LENGTH] = '\0';
999 trlr[TRLR_LENGTH] = '\0';
1000 /* Don't use _filtered; we can't deal with a QUIT out of
1001 target_wait, and I think this might be called from there. */
1002 printf_unfiltered ("Got ack %d \"%s%s\"\n",
1003 HDR_GET_SEQ (hdr), hdr + 1, trlr);
1006 /* If this ack is for the current packet, we're done. */
1007 seq = HDR_GET_SEQ (hdr);
1008 if (seq == mips_send_seq)
1011 /* If this ack is for the last packet, resend the current
1013 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1016 /* Otherwise this is a bad ack; ignore it. Increment the
1017 garbage count to ensure that we do not stay in this loop
1023 mips_error ("Remote did not acknowledge packet");
1026 /* Receive and acknowledge a packet, returning the data in BUFF (which
1027 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1028 implies that only the sender retransmits packets, so this code just
1029 waits silently for a packet. It returns the length of the received
1030 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1031 don't print an error message and return -1. */
1034 mips_receive_packet (buff, throw_error, timeout)
1042 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1049 unsigned char hdr[HDR_LENGTH];
1050 unsigned char trlr[TRLR_LENGTH];
1054 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1057 mips_error ("Timed out waiting for remote packet");
1064 /* An acknowledgement is probably a duplicate; ignore it. */
1065 if (! HDR_IS_DATA (hdr))
1067 len = HDR_GET_LEN (hdr);
1068 /* Check if the length is valid for an ACK, we may aswell
1069 try and read the remainder of the packet: */
1072 /* Ignore the error condition, since we are going to
1073 ignore the packet anyway. */
1074 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1076 /* Don't use _filtered; we can't deal with a QUIT out of
1077 target_wait, and I think this might be called from there. */
1078 if (remote_debug > 0)
1079 printf_unfiltered ("Ignoring unexpected ACK\n");
1083 len = HDR_GET_LEN (hdr);
1084 for (i = 0; i < len; i++)
1088 rch = mips_readchar (timeout);
1094 if (rch == SERIAL_TIMEOUT)
1097 mips_error ("Timed out waiting for remote packet");
1106 /* Don't use _filtered; we can't deal with a QUIT out of
1107 target_wait, and I think this might be called from there. */
1108 if (remote_debug > 0)
1109 printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n",
1114 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1118 mips_error ("Timed out waiting for packet");
1124 /* Don't use _filtered; we can't deal with a QUIT out of
1125 target_wait, and I think this might be called from there. */
1126 if (remote_debug > 0)
1127 printf_unfiltered ("Got SYN when wanted trailer\n");
1131 /* If this is the wrong sequence number, ignore it. */
1132 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1134 /* Don't use _filtered; we can't deal with a QUIT out of
1135 target_wait, and I think this might be called from there. */
1136 if (remote_debug > 0)
1137 printf_unfiltered ("Ignoring sequence number %d (want %d)\n",
1138 HDR_GET_SEQ (hdr), mips_receive_seq);
1142 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1145 if (remote_debug > 0)
1146 /* Don't use _filtered; we can't deal with a QUIT out of
1147 target_wait, and I think this might be called from there. */
1148 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1149 mips_cksum (hdr, buff, len),
1150 TRLR_GET_CKSUM (trlr));
1152 /* The checksum failed. Send an acknowledgement for the
1153 previous packet to tell the remote to resend the packet. */
1154 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1155 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1156 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1157 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1159 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1161 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1162 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1163 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1165 if (remote_debug > 0)
1167 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1168 /* Don't use _filtered; we can't deal with a QUIT out of
1169 target_wait, and I think this might be called from there. */
1170 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1174 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1177 mips_error ("write to target failed: %s", safe_strerror (errno));
1183 if (remote_debug > 0)
1186 /* Don't use _filtered; we can't deal with a QUIT out of
1187 target_wait, and I think this might be called from there. */
1188 printf_unfiltered ("Got packet \"%s\"\n", buff);
1191 /* We got the packet. Send an acknowledgement. */
1192 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1194 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1195 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1196 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1197 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1199 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1201 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1202 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1203 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1205 if (remote_debug > 0)
1207 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1208 /* Don't use _filtered; we can't deal with a QUIT out of
1209 target_wait, and I think this might be called from there. */
1210 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1214 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1217 mips_error ("write to target failed: %s", safe_strerror (errno));
1225 /* Optionally send a request to the remote system and optionally wait
1226 for the reply. This implements the remote debugging protocol,
1227 which is built on top of the packet protocol defined above. Each
1228 request has an ADDR argument and a DATA argument. The following
1229 requests are defined:
1231 \0 don't send a request; just wait for a reply
1232 i read word from instruction space at ADDR
1233 d read word from data space at ADDR
1234 I write DATA to instruction space at ADDR
1235 D write DATA to data space at ADDR
1236 r read register number ADDR
1237 R set register number ADDR to value DATA
1238 c continue execution (if ADDR != 1, set pc to ADDR)
1239 s single step (if ADDR != 1, set pc to ADDR)
1241 The read requests return the value requested. The write requests
1242 return the previous value in the changed location. The execution
1243 requests return a UNIX wait value (the approximate signal which
1244 caused execution to stop is in the upper eight bits).
1246 If PERR is not NULL, this function waits for a reply. If an error
1247 occurs, it sets *PERR to 1 and sets errno according to what the
1248 target board reports. */
1251 mips_request (cmd, addr, data, perr, timeout, buff)
1259 char myBuff[DATA_MAXLEN + 1];
1264 unsigned long rresponse;
1266 if (buff == (char *) NULL)
1271 if (mips_need_reply)
1272 fatal ("mips_request: Trying to send command before reply");
1273 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data));
1274 mips_send_packet (buff, 1);
1275 mips_need_reply = 1;
1278 if (perr == (int *) NULL)
1281 if (! mips_need_reply)
1282 fatal ("mips_request: Trying to get reply before command");
1284 mips_need_reply = 0;
1286 len = mips_receive_packet (buff, 1, timeout);
1289 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1290 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1291 || (cmd != '\0' && rcmd != cmd))
1292 mips_error ("Bad response from remote board");
1298 /* FIXME: This will returns MIPS errno numbers, which may or may
1299 not be the same as errno values used on other systems. If
1300 they stick to common errno values, they will be the same, but
1301 if they don't, they must be translated. */
1312 mips_initialize_cleanups (arg)
1315 mips_initializing = 0;
1319 mips_exit_cleanups (arg)
1326 mips_send_command (cmd, prompt)
1330 SERIAL_WRITE (mips_desc, cmd, strlen(cmd));
1334 mips_expect (mips_monitor_prompt);
1337 /* Enter remote (dbx) debug mode: */
1341 /* Reset the sequence numbers, ready for the new debug sequence: */
1343 mips_receive_seq = 0;
1345 if (mips_monitor != MON_IDT)
1346 mips_send_command ("debug\r", 0);
1347 else /* assume IDT monitor by default */
1348 mips_send_command ("db tty0\r", 0);
1351 SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1);
1353 /* We don't need to absorb any spurious characters here, since the
1354 mips_receive_header will eat up a reasonable number of characters
1355 whilst looking for the SYN, however this avoids the "garbage"
1356 being displayed to the user. */
1357 if (mips_monitor != MON_IDT)
1361 char buff[DATA_MAXLEN + 1];
1362 if (mips_receive_packet (buff, 1, 3) < 0)
1363 mips_error ("Failed to initialize (didn't receive packet).");
1367 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1372 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1376 if (mips_monitor != MON_IDT)
1378 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1379 so we do not get a reply to this command: */
1380 mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL,
1381 mips_receive_wait, NULL);
1382 mips_need_reply = 0;
1383 if (!mips_expect (" break!"))
1387 mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err,
1388 mips_receive_wait, NULL);
1390 if (!mips_expect (mips_monitor_prompt))
1393 do_cleanups (old_cleanups);
1398 /* Initialize a new connection to the MIPS board, and make sure we are
1399 really connected. */
1405 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1408 /* What is this code doing here? I don't see any way it can happen, and
1409 it might mean mips_initializing didn't get cleared properly.
1410 So I'll make it a warning. */
1412 if (mips_initializing)
1414 warning ("internal error: mips_initialize called twice");
1419 mips_initializing = 1;
1421 /* At this point, the packit protocol isn't responding. We'll try getting
1422 into the monitor, and restarting the protocol. */
1424 /* Force the system into the monitor. After this we *should* be at
1425 the mips_monitor_prompt. */
1426 if (mips_monitor != MON_IDT)
1427 j = 0; /* start by checking if we are already at the prompt */
1429 j = 1; /* start by sending a break */
1434 case 0: /* First, try sending a CR */
1435 SERIAL_FLUSH_INPUT (mips_desc);
1436 SERIAL_WRITE (mips_desc, "\r", 1);
1438 case 1: /* First, try sending a break */
1439 SERIAL_SEND_BREAK (mips_desc);
1441 case 2: /* Then, try a ^C */
1442 SERIAL_WRITE (mips_desc, "\003", 1);
1444 case 3: /* Then, try escaping from download */
1446 if (mips_monitor != MON_IDT)
1450 /* We shouldn't need to send multiple termination
1451 sequences, since the target performs line (or
1452 block) reads, and then processes those
1453 packets. In-case we were downloading a large packet
1454 we flush the output buffer before inserting a
1455 termination sequence. */
1456 SERIAL_FLUSH_OUTPUT (mips_desc);
1457 sprintf (tbuff, "\r/E/E\r");
1458 SERIAL_WRITE (mips_desc, tbuff, 6);
1465 /* We are possibly in binary download mode, having
1466 aborted in the middle of an S-record. ^C won't
1467 work because of binary mode. The only reliable way
1468 out is to send enough termination packets (8 bytes)
1469 to fill up and then overflow the largest size
1470 S-record (255 bytes in this case). This amounts to
1474 mips_make_srec (srec, '7', 0, NULL, 0);
1476 for (i = 1; i <= 33; i++)
1478 SERIAL_WRITE (mips_desc, srec, 8);
1480 if (SERIAL_READCHAR (mips_desc, 0) >= 0)
1481 break; /* Break immediatly if we get something from
1488 mips_error ("Failed to initialize.");
1491 if (mips_expect (mips_monitor_prompt))
1495 if (mips_monitor != MON_IDT)
1497 /* Sometimes PMON ignores the first few characters in the first
1498 command sent after a load. Sending a blank command gets
1500 mips_send_command ("\r", -1);
1502 /* Ensure the correct target state: */
1503 if (mips_monitor != MON_LSI)
1504 mips_send_command ("set regsize 64\r", -1);
1505 mips_send_command ("set hostport tty0\r", -1);
1506 mips_send_command ("set brkcmd \"\"\r", -1);
1507 /* Delete all the current breakpoints: */
1508 mips_send_command ("db *\r", -1);
1509 /* NOTE: PMON does not have breakpoint support through the
1510 "debug" mode, only at the monitor command-line. */
1513 mips_enter_debug ();
1515 /* Clear all breakpoints: */
1516 if ((mips_monitor == MON_IDT
1517 && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1518 || mips_monitor == MON_LSI)
1519 monitor_supports_breakpoints = 1;
1521 monitor_supports_breakpoints = 0;
1523 do_cleanups (old_cleanups);
1525 /* If this doesn't call error, we have connected; we don't care if
1526 the request itself succeeds or fails. */
1528 mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err,
1529 mips_receive_wait, NULL);
1530 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1531 select_frame (get_current_frame (), 0);
1534 /* Open a connection to the remote board. */
1536 common_open (ops, name, from_tty, new_monitor, new_monitor_prompt)
1537 struct target_ops *ops;
1540 enum mips_monitor_type new_monitor;
1541 char *new_monitor_prompt;
1544 char *serial_port_name;
1545 char *remote_name = 0;
1546 char *local_name = 0;
1551 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1552 device is attached to the target board (e.g., /dev/ttya).\n"
1553 "If you want to use TFTP to download to the board, specify the name of a\n"
1554 "temporary file to be used by GDB for downloads as the second argument.\n"
1555 "This filename must be in the form host:filename, where host is the name\n"
1556 "of the host running the TFTP server, and the file must be readable by the\n"
1557 "world. If the local name of the temporary file differs from the name as\n"
1558 "seen from the board via TFTP, specify that name as the third parameter.\n");
1560 /* Parse the serial port name, the optional TFTP name, and the
1561 optional local TFTP name. */
1562 if ((argv = buildargv (name)) == NULL)
1564 make_cleanup ((make_cleanup_func) freeargv, argv);
1566 serial_port_name = strsave (argv[0]);
1567 if (argv[1]) /* remote TFTP name specified? */
1569 remote_name = argv[1];
1570 if (argv[2]) /* local TFTP filename specified? */
1571 local_name = argv[2];
1574 target_preopen (from_tty);
1577 unpush_target (current_ops);
1579 /* Open and initialize the serial port. */
1580 mips_desc = SERIAL_OPEN (serial_port_name);
1581 if (mips_desc == (serial_t) NULL)
1582 perror_with_name (serial_port_name);
1584 if (baud_rate != -1)
1586 if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
1588 SERIAL_CLOSE (mips_desc);
1589 perror_with_name (serial_port_name);
1593 SERIAL_RAW (mips_desc);
1595 /* Open and initialize the optional download port. If it is in the form
1596 hostname#portnumber, it's a UDP socket. If it is in the form
1597 hostname:filename, assume it's the TFTP filename that must be
1598 passed to the DDB board to tell it where to get the load file. */
1601 if (strchr (remote_name, '#'))
1603 udp_desc = SERIAL_OPEN (remote_name);
1605 perror_with_name ("Unable to open UDP port");
1610 /* Save the remote and local names of the TFTP temp file. If
1611 the user didn't specify a local name, assume it's the same
1612 as the part of the remote name after the "host:". */
1616 free (tftp_localname);
1617 if (local_name == NULL)
1618 if ((local_name = strchr (remote_name, ':')) != NULL)
1619 local_name++; /* skip over the colon */
1620 if (local_name == NULL)
1621 local_name = remote_name; /* local name same as remote name */
1622 tftp_name = strsave (remote_name);
1623 tftp_localname = strsave (local_name);
1631 /* Reset the expected monitor prompt if it's never been set before. */
1632 if (mips_monitor_prompt == NULL)
1633 mips_monitor_prompt = strsave (new_monitor_prompt);
1634 mips_monitor = new_monitor;
1639 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1641 /* Switch to using remote target now. */
1644 /* FIXME: Should we call start_remote here? */
1646 /* Try to figure out the processor model if possible. */
1647 ptype = mips_read_processor_type ();
1649 mips_set_processor_type_command (strsave (ptype), 0);
1651 /* This is really the job of start_remote however, that makes an assumption
1652 that the target is about to print out a status message of some sort. That
1653 doesn't happen here (in fact, it may not be possible to get the monitor to
1654 send the appropriate packet). */
1656 flush_cached_frames ();
1657 registers_changed ();
1658 stop_pc = read_pc ();
1659 set_current_frame (create_new_frame (read_fp (), stop_pc));
1660 select_frame (get_current_frame (), 0);
1661 print_stack_frame (selected_frame, -1, 1);
1662 free (serial_port_name);
1666 mips_open (name, from_tty)
1670 common_open (&mips_ops, name, from_tty, MON_IDT, TARGET_MONITOR_PROMPT);
1674 pmon_open (name, from_tty)
1678 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1682 ddb_open (name, from_tty)
1686 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1690 lsi_open (name, from_tty)
1696 /* Clear the LSI breakpoint table. */
1697 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1698 lsi_breakpoints[i].type = BREAK_UNUSED;
1700 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1703 /* Close a connection to the remote board. */
1706 mips_close (quitting)
1711 /* Get the board out of remote debugging mode. */
1712 (void) mips_exit_debug ();
1718 /* Detach from the remote board. */
1721 mips_detach (args, from_tty)
1726 error ("Argument given to \"detach\" when remotely debugging.");
1733 printf_unfiltered ("Ending remote MIPS debugging.\n");
1736 /* Tell the target board to resume. This does not wait for a reply
1737 from the board, except in the case of single-stepping on LSI boards,
1738 where PMON does return a reply. */
1741 mips_resume (pid, step, siggnal)
1743 enum target_signal siggnal;
1747 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1748 a single step, so we wait for that. */
1749 mips_request (step ? 's' : 'c',
1751 (unsigned int) siggnal,
1752 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1753 mips_receive_wait, NULL);
1756 /* Return the signal corresponding to SIG, where SIG is the number which
1757 the MIPS protocol uses for the signal. */
1759 mips_signal_from_protocol (sig)
1762 /* We allow a few more signals than the IDT board actually returns, on
1763 the theory that there is at least *some* hope that perhaps the numbering
1764 for these signals is widely agreed upon. */
1767 return TARGET_SIGNAL_UNKNOWN;
1769 /* Don't want to use target_signal_from_host because we are converting
1770 from MIPS signal numbers, not host ones. Our internal numbers
1771 match the MIPS numbers for the signals the board can return, which
1772 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1773 return (enum target_signal) sig;
1776 /* Wait until the remote stops, and return a wait status. */
1779 mips_wait (pid, status)
1781 struct target_waitstatus *status;
1785 char buff[DATA_MAXLEN];
1791 interrupt_count = 0;
1794 /* If we have not sent a single step or continue command, then the
1795 board is waiting for us to do something. Return a status
1796 indicating that it is stopped. */
1797 if (! mips_need_reply)
1799 status->kind = TARGET_WAITKIND_STOPPED;
1800 status->value.sig = TARGET_SIGNAL_TRAP;
1804 /* No timeout; we sit here as long as the program continues to execute. */
1806 rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1,
1810 mips_error ("Remote failure: %s", safe_strerror (errno));
1812 /* On returning from a continue, the PMON monitor seems to start
1813 echoing back the messages we send prior to sending back the
1814 ACK. The code can cope with this, but to try and avoid the
1815 unnecessary serial traffic, and "spurious" characters displayed
1816 to the user, we cheat and reset the debug protocol. The problems
1817 seems to be caused by a check on the number of arguments, and the
1818 command length, within the monitor causing it to echo the command
1820 if (mips_monitor == MON_PMON)
1823 mips_enter_debug ();
1826 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1828 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1829 &rpc, &rfp, &rsp, flags);
1832 char buf[MAX_REGISTER_RAW_SIZE];
1834 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc);
1835 supply_register (PC_REGNUM, buf);
1837 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp);
1838 supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
1840 store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp);
1841 supply_register (SP_REGNUM, buf);
1843 store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0);
1844 supply_register (FP_REGNUM, buf);
1850 for (i = 0; i <= 2; i++)
1851 if (flags[i] == 'r' || flags[i] == 'w')
1853 else if (flags[i] == '\000')
1858 if (strcmp (target_shortname, "lsi") == 0)
1861 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1862 Right now, PMON doesn't give us enough information to determine which
1863 breakpoint we hit. So we have to look up the PC in our own table
1864 of breakpoints, and if found, assume it's just a normal instruction
1865 fetch breakpoint, not a data watchpoint. FIXME when PMON
1866 provides some way to tell us what type of breakpoint it is. */
1868 CORE_ADDR pc = read_pc();
1871 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1873 if (lsi_breakpoints[i].addr == pc
1874 && lsi_breakpoints[i].type == BREAK_FETCH)
1881 /* If a data breakpoint was hit, PMON returns the following packet:
1883 The return packet from an ordinary breakpoint doesn't have the
1884 extra 0x01 field tacked onto the end. */
1885 if (nfields == 1 && rpc == 1)
1890 /* NOTE: The following (sig) numbers are defined by PMON:
1891 SPP_SIGTRAP 5 breakpoint
1899 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1900 and so on, because the constants we want here are determined by the
1901 MIPS protocol and have nothing to do with what host we are running on. */
1902 if ((rstatus & 0xff) == 0)
1904 status->kind = TARGET_WAITKIND_EXITED;
1905 status->value.integer = (((rstatus) >> 8) & 0xff);
1907 else if ((rstatus & 0xff) == 0x7f)
1909 status->kind = TARGET_WAITKIND_STOPPED;
1910 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1912 /* If the stop PC is in the _exit function, assume
1913 we hit the 'break 0x3ff' instruction in _exit, so this
1914 is not a normal breakpoint. */
1915 if (strcmp (target_shortname, "lsi") == 0)
1918 CORE_ADDR func_start;
1919 CORE_ADDR pc = read_pc();
1921 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1922 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1923 && func_start == pc)
1924 status->kind = TARGET_WAITKIND_EXITED;
1929 status->kind = TARGET_WAITKIND_SIGNALLED;
1930 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1936 /* We have to map between the register numbers used by gdb and the
1937 register numbers used by the debugging protocol. This function
1938 assumes that we are using tm-mips.h. */
1940 #define REGNO_OFFSET 96
1943 mips_map_regno (regno)
1948 if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
1949 return regno - FP0_REGNUM + 32;
1953 return REGNO_OFFSET + 0;
1955 return REGNO_OFFSET + 1;
1957 return REGNO_OFFSET + 2;
1959 return REGNO_OFFSET + 3;
1961 return REGNO_OFFSET + 4;
1963 return REGNO_OFFSET + 5;
1965 /* FIXME: Is there a way to get the status register? */
1970 /* Fetch the remote registers. */
1973 mips_fetch_registers (regno)
1976 unsigned LONGEST val;
1981 for (regno = 0; regno < NUM_REGS; regno++)
1982 mips_fetch_registers (regno);
1986 if (regno == FP_REGNUM || regno == ZERO_REGNUM)
1987 /* FP_REGNUM on the mips is a hack which is just supposed to read
1988 zero (see also mips-nat.c). */
1992 /* If PMON doesn't support this register, don't waste serial
1993 bandwidth trying to read it. */
1994 int pmon_reg = mips_map_regno (regno);
1995 if (regno != 0 && pmon_reg == 0)
1999 /* Unfortunately the PMON version in the Vr4300 board has been
2000 compiled without the 64bit register access commands. This
2001 means we cannot get hold of the full register width. */
2002 if (mips_monitor == MON_DDB)
2003 val = (unsigned)mips_request ('t', (unsigned int) pmon_reg,
2004 (unsigned int) 0, &err, mips_receive_wait, NULL);
2006 val = mips_request ('r', (unsigned int) pmon_reg,
2007 (unsigned int) 0, &err, mips_receive_wait, NULL);
2009 mips_error ("Can't read register %d: %s", regno,
2010 safe_strerror (errno));
2015 char buf[MAX_REGISTER_RAW_SIZE];
2017 /* We got the number the register holds, but gdb expects to see a
2018 value in the target byte ordering. */
2019 store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val);
2020 supply_register (regno, buf);
2024 /* Prepare to store registers. The MIPS protocol can store individual
2025 registers, so this function doesn't have to do anything. */
2028 mips_prepare_to_store ()
2032 /* Store remote register(s). */
2035 mips_store_registers (regno)
2042 for (regno = 0; regno < NUM_REGS; regno++)
2043 mips_store_registers (regno);
2047 mips_request ('R', (unsigned int) mips_map_regno (regno),
2048 read_register (regno),
2049 &err, mips_receive_wait, NULL);
2051 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2054 /* Fetch a word from the target board. */
2057 mips_fetch_word (addr)
2063 /* FIXME! addr was cast to uint! */
2064 val = mips_request ('d', addr, (unsigned int) 0, &err,
2065 mips_receive_wait, NULL);
2068 /* Data space failed; try instruction space. */
2069 /* FIXME! addr was cast to uint! */
2070 val = mips_request ('i', addr, (unsigned int) 0, &err,
2071 mips_receive_wait, NULL);
2073 mips_error ("Can't read address 0x%s: %s",
2074 paddr_nz (addr), safe_strerror (errno));
2079 /* Store a word to the target board. Returns errno code or zero for
2080 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2081 memory location there. */
2083 /* FIXME! make sure only 32-bit quantities get stored! */
2085 mips_store_word (addr, val, old_contents)
2091 unsigned int oldcontents;
2093 oldcontents = mips_request ('D', addr, (unsigned int) val,
2095 mips_receive_wait, NULL);
2098 /* Data space failed; try instruction space. */
2099 oldcontents = mips_request ('I', addr,
2100 (unsigned int) val, &err,
2101 mips_receive_wait, NULL);
2105 if (old_contents != NULL)
2106 store_unsigned_integer (old_contents, 4, oldcontents);
2110 /* Read or write LEN bytes from inferior memory at MEMADDR,
2111 transferring to or from debugger address MYADDR. Write to inferior
2112 if SHOULD_WRITE is nonzero. Returns length of data written or
2113 read; 0 for error. Note that protocol gives us the correct value
2114 for a longword, since it transfers values in ASCII. We want the
2115 byte values, so we have to swap the longword values. */
2118 mips_xfer_memory (memaddr, myaddr, len, write, ignore)
2123 struct target_ops *ignore;
2126 /* Round starting address down to longword boundary. */
2127 register CORE_ADDR addr = memaddr &~ 3;
2128 /* Round ending address up; get number of longwords that makes. */
2129 register int count = (((memaddr + len) - addr) + 3) / 4;
2130 /* Allocate buffer of that many longwords. */
2131 register char *buffer = alloca (count * 4);
2137 /* Fill start and end extra bytes of buffer with existing data. */
2138 if (addr != memaddr || len < 4)
2140 /* Need part of initial word -- fetch it. */
2141 store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr));
2146 /* Need part of last word -- fetch it. FIXME: we do this even
2147 if we don't need it. */
2148 store_unsigned_integer (&buffer[(count - 1) * 4], 4,
2149 mips_fetch_word (addr + (count - 1) * 4));
2152 /* Copy data to be written over corresponding part of buffer */
2154 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2156 /* Write the entire buffer. */
2158 for (i = 0; i < count; i++, addr += 4)
2160 status = mips_store_word (addr,
2161 extract_unsigned_integer (&buffer[i*4], 4),
2163 /* Report each kilobyte (we download 32-bit words at a time) */
2166 printf_unfiltered ("*");
2167 gdb_flush (gdb_stdout);
2174 /* FIXME: Do we want a QUIT here? */
2177 printf_unfiltered ("\n");
2181 /* Read all the longwords */
2182 for (i = 0; i < count; i++, addr += 4)
2184 store_unsigned_integer (&buffer[i*4], 4, mips_fetch_word (addr));
2188 /* Copy appropriate bytes out of the buffer. */
2189 memcpy (myaddr, buffer + (memaddr & 3), len);
2194 /* Print info on this target. */
2197 mips_files_info (ignore)
2198 struct target_ops *ignore;
2200 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2203 /* Kill the process running on the board. This will actually only
2204 work if we are doing remote debugging over the console input. I
2205 think that if IDT/sim had the remote debug interrupt enabled on the
2206 right port, we could interrupt the process with a break signal. */
2211 if (!mips_wait_flag)
2216 if (interrupt_count >= 2)
2218 interrupt_count = 0;
2220 target_terminal_ours ();
2222 if (query ("Interrupted while waiting for the program.\n\
2223 Give up (and stop debugging it)? "))
2225 /* Clean up in such a way that mips_close won't try to talk to the
2226 board (it almost surely won't work since we weren't able to talk to
2231 printf_unfiltered ("Ending remote MIPS debugging.\n");
2232 target_mourn_inferior ();
2234 return_to_top_level (RETURN_QUIT);
2237 target_terminal_inferior ();
2240 if (remote_debug > 0)
2241 printf_unfiltered ("Sending break\n");
2243 SERIAL_SEND_BREAK (mips_desc);
2252 SERIAL_WRITE (mips_desc, &cc, 1);
2254 target_mourn_inferior ();
2259 /* Start running on the target board. */
2262 mips_create_inferior (execfile, args, env)
2272 Can't pass arguments to remote MIPS board; arguments ignored.");
2273 /* And don't try to use them on the next "run" command. */
2274 execute_command ("set args", 0);
2277 if (execfile == 0 || exec_bfd == 0)
2278 error ("No executable file specified");
2280 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2282 init_wait_for_inferior ();
2284 /* FIXME: Should we set inferior_pid here? */
2286 proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
2289 /* Clean up after a process. Actually nothing to do. */
2292 mips_mourn_inferior ()
2294 if (current_ops != NULL)
2295 unpush_target (current_ops);
2296 generic_mourn_inferior ();
2299 /* We can write a breakpoint and read the shadow contents in one
2302 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2303 support, we read the contents of the target location and stash it,
2304 then overwrite it with a breakpoint instruction. ADDR is the target
2305 location in the target machine. CONTENTS_CACHE is a pointer to
2306 memory allocated for saving the target contents. It is guaranteed
2307 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2308 is accomplished via BREAKPOINT_MAX). */
2311 mips_insert_breakpoint (addr, contents_cache)
2313 char *contents_cache;
2315 if (monitor_supports_breakpoints)
2316 return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2318 return memory_insert_breakpoint (addr, contents_cache);
2322 mips_remove_breakpoint (addr, contents_cache)
2324 char *contents_cache;
2326 if (monitor_supports_breakpoints)
2327 return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2329 return memory_remove_breakpoint (addr, contents_cache);
2332 #if 0 /* currently not used */
2333 /* PMON does not currently provide support for the debug mode 'b'
2334 commands to manipulate breakpoints. However, if we wanted to use
2335 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2336 then this code performs the work needed to leave debug mode,
2337 set/clear the breakpoint, and then return to debug mode. */
2339 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2340 static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
2341 /* NOTE: The code relies on this vector being zero-initialised by the system */
2344 pmon_insert_breakpoint (addr, contents_cache)
2346 char *contents_cache;
2350 if (monitor_supports_breakpoints)
2352 char tbuff[12]; /* space for breakpoint command */
2356 /* PMON does not support debug level breakpoint set/remove: */
2357 if (mips_exit_debug ())
2358 mips_error ("Failed to exit debug mode");
2360 sprintf (tbuff, "b %08x\r", addr);
2361 mips_send_command (tbuff, 0);
2363 mips_expect ("Bpt ");
2365 if (!mips_getstring (tbuff, 2))
2367 tbuff[2] = '\0'; /* terminate the string */
2368 if (sscanf (tbuff, "%d", &bpnum) != 1)
2370 fprintf_unfiltered (gdb_stderr,
2371 "Invalid decimal breakpoint number from target: %s\n", tbuff);
2375 mips_expect (" = ");
2377 /* Lead in the hex number we are expecting: */
2381 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2382 which targets return 64-bit addresses? PMON returns only 32! */
2383 if (!mips_getstring (&tbuff[2], 8))
2385 tbuff[10] = '\0'; /* terminate the string */
2387 if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
2389 fprintf_unfiltered (gdb_stderr,
2390 "Invalid hex address from target: %s\n", tbuff);
2394 if (bpnum >= PMON_MAX_BP)
2396 fprintf_unfiltered (gdb_stderr,
2397 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2398 bpnum, PMON_MAX_BP - 1);
2403 fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
2405 mips_pmon_bp_info[bpnum] = bpaddr;
2407 mips_expect ("\r\n");
2408 mips_expect (mips_monitor_prompt);
2410 mips_enter_debug ();
2415 return mips_store_word (addr, BREAK_INSN, contents_cache);
2419 pmon_remove_breakpoint (addr, contents_cache)
2421 char *contents_cache;
2423 if (monitor_supports_breakpoints)
2426 char tbuff[7]; /* enough for delete breakpoint command */
2428 for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
2429 if (mips_pmon_bp_info[bpnum] == addr)
2432 if (bpnum >= PMON_MAX_BP)
2434 fprintf_unfiltered (gdb_stderr,
2435 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2440 if (mips_exit_debug ())
2441 mips_error ("Failed to exit debug mode");
2443 sprintf (tbuff, "db %02d\r", bpnum);
2445 mips_send_command (tbuff, -1);
2446 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2447 set" message will be returned. */
2449 mips_enter_debug ();
2454 return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
2459 /* Tell whether this target can support a hardware breakpoint. CNT
2460 is the number of hardware breakpoints already installed. This
2461 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2464 remote_mips_can_use_hardware_watchpoint (cnt)
2467 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2471 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2472 This is used for memory ref breakpoints. */
2474 static unsigned long
2475 calculate_mask (addr, len)
2482 mask = addr ^ (addr + len - 1);
2484 for (i = 32; i >= 0; i--)
2490 mask = (unsigned long) 0xffffffff >> i;
2496 /* Insert a hardware breakpoint. This works only on LSI targets, which
2497 implement ordinary breakpoints using hardware facilities. */
2500 remote_mips_insert_hw_breakpoint (addr, contents_cache)
2502 char *contents_cache;
2504 if (strcmp (target_shortname, "lsi") == 0)
2505 return mips_insert_breakpoint (addr, contents_cache);
2511 /* Remove a hardware breakpoint. This works only on LSI targets, which
2512 implement ordinary breakpoints using hardware facilities. */
2515 remote_mips_remove_hw_breakpoint (addr, contents_cache)
2517 char *contents_cache;
2519 if (strcmp (target_shortname, "lsi") == 0)
2520 return mips_remove_breakpoint (addr, contents_cache);
2525 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2526 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2530 remote_mips_set_watchpoint (addr, len, type)
2535 if (set_breakpoint (addr, len, type))
2542 remote_mips_remove_watchpoint (addr, len, type)
2547 if (clear_breakpoint (addr, len, type))
2554 remote_mips_stopped_by_watchpoint ()
2556 return hit_watchpoint;
2560 /* Insert a breakpoint. */
2563 set_breakpoint (addr, len, type)
2566 enum break_type type;
2568 return common_breakpoint (1, addr, len, type);
2572 /* Clear a breakpoint. */
2575 clear_breakpoint (addr, len, type)
2578 enum break_type type;
2580 return common_breakpoint (0, addr, len, type);
2584 /* Check the error code from the return packet for an LSI breakpoint
2585 command. If there's no error, just return 0. If it's a warning,
2586 print the warning text and return 0. If it's an error, print
2587 the error text and return 1. <ADDR> is the address of the breakpoint
2588 that was being set. <RERRFLG> is the error code returned by PMON.
2589 This is a helper function for common_breakpoint. */
2592 check_lsi_error (addr, rerrflg)
2596 struct lsi_error *err;
2597 char *saddr = paddr_nz (addr); /* printable address string */
2599 if (rerrflg == 0) /* no error */
2602 /* Warnings can be ORed together, so check them all. */
2603 if (rerrflg & W_WARN)
2605 if (monitor_warnings)
2608 for (err = lsi_warning_table; err->code != 0; err++)
2610 if ((err->code & rerrflg) == err->code)
2613 fprintf_unfiltered (gdb_stderr,
2614 "common_breakpoint (0x%s): Warning: %s\n",
2620 fprintf_unfiltered (gdb_stderr,
2621 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2628 /* Errors are unique, i.e. can't be ORed together. */
2629 for (err = lsi_error_table; err->code != 0; err++)
2631 if ((err->code & rerrflg) == err->code)
2633 fprintf_unfiltered (gdb_stderr,
2634 "common_breakpoint (0x%s): Error: %s\n",
2640 fprintf_unfiltered (gdb_stderr,
2641 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2648 /* This routine sends a breakpoint command to the remote target.
2650 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2651 <ADDR> is the address of the breakpoint.
2652 <LEN> the length of the region to break on.
2653 <TYPE> is the type of breakpoint:
2654 0 = write (BREAK_WRITE)
2655 1 = read (BREAK_READ)
2656 2 = read/write (BREAK_ACCESS)
2657 3 = instruction fetch (BREAK_FETCH)
2659 Return 0 if successful; otherwise 1. */
2662 common_breakpoint (set, addr, len, type)
2666 enum break_type type;
2668 char buf[DATA_MAXLEN + 1];
2670 int rpid, rerrflg, rresponse, rlen;
2673 addr = ADDR_BITS_REMOVE (addr);
2675 if (mips_monitor == MON_LSI)
2677 if (set == 0) /* clear breakpoint */
2679 /* The LSI PMON "clear breakpoint" has this form:
2680 <pid> 'b' <bptn> 0x0
2682 <pid> 'b' 0x0 <code>
2684 <bptn> is a breakpoint number returned by an earlier 'B' command.
2685 Possible return codes: OK, E_BPT. */
2689 /* Search for the breakpoint in the table. */
2690 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2691 if (lsi_breakpoints[i].type == type
2692 && lsi_breakpoints[i].addr == addr
2693 && lsi_breakpoints[i].len == len)
2696 /* Clear the table entry and tell PMON to clear the breakpoint. */
2697 if (i == MAX_LSI_BREAKPOINTS)
2699 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2704 lsi_breakpoints[i].type = BREAK_UNUSED;
2705 sprintf (buf, "0x0 b 0x%x 0x0", i);
2706 mips_send_packet (buf, 1);
2708 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2711 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2713 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2715 return (check_lsi_error (addr, rerrflg));
2717 else /* set a breakpoint */
2719 /* The LSI PMON "set breakpoint" command has this form:
2720 <pid> 'B' <addr> 0x0
2722 <pid> 'B' <bptn> <code>
2724 The "set data breakpoint" command has this form:
2726 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2728 where: type= "0x1" = read
2730 "0x3" = access (read or write)
2732 The reply returns two values:
2733 bptn - a breakpoint number, which is a small integer with
2734 possible values of zero through 255.
2735 code - an error return code, a value of zero indicates a
2736 succesful completion, other values indicate various
2737 errors and warnings.
2739 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2743 if (type == BREAK_FETCH) /* instruction breakpoint */
2746 sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr));
2748 else /* watchpoint */
2751 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr),
2752 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2753 paddr_nz (addr + len - 1));
2755 mips_send_packet (buf, 1);
2757 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2760 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2761 &rpid, &rcmd, &rresponse, &rerrflg);
2762 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2763 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2766 if (check_lsi_error (addr, rerrflg))
2769 /* rresponse contains PMON's breakpoint number. Record the
2770 information for this breakpoint so we can clear it later. */
2771 lsi_breakpoints[rresponse].type = type;
2772 lsi_breakpoints[rresponse].addr = addr;
2773 lsi_breakpoints[rresponse].len = len;
2780 /* On non-LSI targets, the breakpoint command has this form:
2781 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2782 <MASK> is a don't care mask for addresses.
2783 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2787 mask = calculate_mask (addr, len);
2790 if (set) /* set a breakpoint */
2795 case BREAK_WRITE: /* write */
2798 case BREAK_READ: /* read */
2801 case BREAK_ACCESS: /* read/write */
2804 case BREAK_FETCH: /* fetch */
2812 sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr),
2813 paddr_nz (mask), flags);
2818 sprintf (buf, "0x0 b 0x%s", paddr_nz (addr));
2821 mips_send_packet (buf, 1);
2823 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2826 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2827 &rpid, &rcmd, &rerrflg, &rresponse);
2829 if (nfields != 4 || rcmd != cmd)
2830 mips_error ("common_breakpoint: Bad response from remote board: %s",
2835 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2836 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2837 if (mips_monitor == MON_DDB)
2838 rresponse = rerrflg;
2839 if (rresponse != 22) /* invalid argument */
2840 fprintf_unfiltered (gdb_stderr,
2841 "common_breakpoint (0x%s): Got error: 0x%x\n",
2842 paddr_nz (addr), rresponse);
2850 send_srec (srec, len, addr)
2859 SERIAL_WRITE (mips_desc, srec, len);
2861 ch = mips_readchar (2);
2865 case SERIAL_TIMEOUT:
2866 error ("Timeout during download.");
2870 case 0x15: /* NACK */
2871 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr);
2874 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2879 /* Download a binary file by converting it to S records. */
2882 mips_load_srec (args)
2887 char *buffer, srec[1024];
2889 unsigned int srec_frame = 200;
2891 static int hashmark = 1;
2893 buffer = alloca (srec_frame * 2 + 256);
2895 abfd = bfd_openr (args, 0);
2898 printf_filtered ("Unable to open file %s\n", args);
2902 if (bfd_check_format (abfd, bfd_object) == 0)
2904 printf_filtered ("File is not an object file\n");
2908 /* This actually causes a download in the IDT binary format: */
2909 mips_send_command (LOAD_CMD, 0);
2911 for (s = abfd->sections; s; s = s->next)
2913 if (s->flags & SEC_LOAD)
2915 unsigned int numbytes;
2917 /* FIXME! vma too small?? */
2918 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma,
2919 s->vma + s->_raw_size);
2920 gdb_flush (gdb_stdout);
2922 for (i = 0; i < s->_raw_size; i += numbytes)
2924 numbytes = min (srec_frame, s->_raw_size - i);
2926 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2928 reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
2929 send_srec (srec, reclen, s->vma + i);
2933 putchar_unfiltered ('#');
2934 gdb_flush (gdb_stdout);
2937 } /* Per-packet (or S-record) loop */
2939 putchar_unfiltered ('\n');
2940 } /* Loadable sections */
2943 putchar_unfiltered ('\n');
2945 /* Write a type 7 terminator record. no data for a type 7, and there
2946 is no data, so len is 0. */
2948 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2950 send_srec (srec, reclen, abfd->start_address);
2952 SERIAL_FLUSH_INPUT (mips_desc);
2956 * mips_make_srec -- make an srecord. This writes each line, one at a
2957 * time, each with it's own header and trailer line.
2958 * An srecord looks like this:
2960 * byte count-+ address
2961 * start ---+ | | data +- checksum
2963 * S01000006F6B692D746573742E73726563E4
2964 * S315000448600000000000000000FC00005900000000E9
2965 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2966 * S30B0004485A0000000000004E
2969 * S<type><length><address><data><checksum>
2973 * is the number of bytes following upto the checksum. Note that
2974 * this is not the number of chars following, since it takes two
2975 * chars to represent a byte.
2979 * 1) two byte address data record
2980 * 2) three byte address data record
2981 * 3) four byte address data record
2982 * 7) four byte address termination record
2983 * 8) three byte address termination record
2984 * 9) two byte address termination record
2987 * is the start address of the data following, or in the case of
2988 * a termination record, the start address of the image
2992 * is the sum of all the raw byte data in the record, from the length
2993 * upwards, modulo 256 and subtracted from 255.
2995 * This routine returns the length of the S-record.
3000 mips_make_srec (buf, type, memaddr, myaddr, len)
3004 unsigned char *myaddr;
3007 unsigned char checksum;
3010 /* Create the header for the srec. addr_size is the number of bytes in the address,
3011 and 1 is the number of bytes in the count. */
3013 /* FIXME!! bigger buf required for 64-bit! */
3016 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
3017 /* This assumes S3 style downloads (4byte addresses). There should
3018 probably be a check, or the code changed to make it more
3020 buf[3] = memaddr >> 24;
3021 buf[4] = memaddr >> 16;
3022 buf[5] = memaddr >> 8;
3024 memcpy (&buf[7], myaddr, len);
3026 /* Note that the checksum is calculated on the raw data, not the
3027 hexified data. It includes the length, address and the data
3028 portions of the packet. */
3030 buf += 2; /* Point at length byte */
3031 for (i = 0; i < len + 4 + 1; i++)
3039 /* The following manifest controls whether we enable the simple flow
3040 control support provided by the monitor. If enabled the code will
3041 wait for an affirmative ACK between transmitting packets. */
3042 #define DOETXACK (1)
3044 /* The PMON fast-download uses an encoded packet format constructed of
3045 3byte data packets (encoded as 4 printable ASCII characters), and
3046 escape sequences (preceded by a '/'):
3049 'C' compare checksum (12bit value, not included in checksum calculation)
3050 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
3051 'Z' zero fill multiple of 3bytes
3052 'B' byte (12bit encoded value, of 8bit data)
3053 'A' address (36bit encoded value)
3054 'E' define entry as original address, and exit load
3056 The packets are processed in 4 character chunks, so the escape
3057 sequences that do not have any data (or variable length data)
3058 should be padded to a 4 character boundary. The decoder will give
3059 an error if the complete message block size is not a multiple of
3060 4bytes (size of record).
3062 The encoding of numbers is done in 6bit fields. The 6bit value is
3063 used to index into this string to get the specific character
3064 encoding for the value: */
3065 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
3067 /* Convert the number of bits required into an encoded number, 6bits
3068 at a time (range 0..63). Keep a checksum if required (passed
3069 pointer non-NULL). The function returns the number of encoded
3070 characters written into the buffer. */
3072 pmon_makeb64 (v, p, n, chksum)
3078 int count = (n / 6);
3080 if ((n % 12) != 0) {
3081 fprintf_unfiltered(gdb_stderr,
3082 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n,(n == 1)?"":"s");
3086 fprintf_unfiltered(gdb_stderr,
3087 "Fast encoding cannot process more than 36bits at the moment: %dbits\n",n);
3091 /* Deal with the checksum: */
3092 if (chksum != NULL) {
3094 case 36: *chksum += ((v >> 24) & 0xFFF);
3095 case 24: *chksum += ((v >> 12) & 0xFFF);
3096 case 12: *chksum += ((v >> 0) & 0xFFF);
3102 *p++ = encoding[(v >> n) & 0x3F];
3108 /* Shorthand function (that could be in-lined) to output the zero-fill
3109 escape sequence into the data stream. */
3111 pmon_zeroset (recsize, buff, amount, chksum)
3115 unsigned int *chksum;
3119 sprintf(*buff,"/Z");
3120 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3121 *buff += (count + 2);
3123 return(recsize + count + 2);
3127 pmon_checkset (recsize, buff, value)
3134 /* Add the checksum (without updating the value): */
3135 sprintf (*buff, "/C");
3136 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3137 *buff += (count + 2);
3138 sprintf (*buff, "\n");
3139 *buff += 2; /* include zero terminator */
3140 /* Forcing a checksum validation clears the sum: */
3142 return(recsize + count + 3);
3145 /* Amount of padding we leave after at the end of the output buffer,
3146 for the checksum and line termination characters: */
3147 #define CHECKSIZE (4 + 4 + 4 + 2)
3148 /* zero-fill, checksum, transfer end and line termination space. */
3150 /* The amount of binary data loaded from the object file in a single
3152 #define BINCHUNK (1024)
3154 /* Maximum line of data accepted by the monitor: */
3155 #define MAXRECSIZE (550)
3156 /* NOTE: This constant depends on the monitor being used. This value
3157 is for PMON 5.x on the Cogent Vr4300 board. */
3160 pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill)
3162 unsigned char *inbuf;
3167 unsigned int *zerofill;
3172 /* This is a simple check to ensure that our data will fit within
3173 the maximum allowable record size. Each record output is 4bytes
3174 in length. We must allow space for a pending zero fill command,
3175 the record, and a checksum record. */
3176 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) {
3177 /* Process the binary data: */
3178 if ((inamount - *inptr) < 3) {
3180 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3182 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3184 *recsize += (2 + count);
3187 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3188 /* Simple check for zero data. TODO: A better check would be
3189 to check the last, and then the middle byte for being zero
3190 (if the first byte is not). We could then check for
3191 following runs of zeros, and if above a certain size it is
3192 worth the 4 or 8 character hit of the byte insertions used
3193 to pad to the start of the zeroes. NOTE: This also depends
3194 on the alignment at the end of the zero run. */
3195 if (value == 0x00000000) {
3197 if (*zerofill == 0xFFF) /* 12bit counter */
3198 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3201 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3202 count = pmon_makeb64 (value, p, 24, csum);
3215 pmon_check_ack(mesg)
3218 #if defined(DOETXACK)
3223 c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc, 2);
3224 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3226 fprintf_unfiltered (gdb_stderr,
3227 "Failed to receive valid ACK for %s\n", mesg);
3228 return(-1); /* terminate the download */
3231 #endif /* DOETXACK */
3235 /* pmon_download - Send a sequence of characters to the PMON download port,
3236 which is either a serial port or a UDP socket. */
3239 pmon_start_download ()
3243 /* Create the temporary download file. */
3244 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3245 perror_with_name (tftp_localname);
3249 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3250 mips_expect ("Downloading from ");
3251 mips_expect (udp_in_use ? "udp" : "tty0");
3252 mips_expect (", ^C to abort\r\n");
3257 mips_expect_download (char *string)
3259 if (!mips_expect (string))
3261 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3263 remove (tftp_localname); /* Remove temporary file */
3271 pmon_end_download (final, bintotal)
3275 char hexnumber[9]; /* includes '\0' space */
3279 static char *load_cmd_prefix = "load -b -s ";
3283 /* Close off the temporary file containing the load data. */
3287 /* Make the temporary file readable by the world. */
3288 if (stat (tftp_localname, &stbuf) == 0)
3289 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3291 /* Must reinitialize the board to prevent PMON from crashing. */
3292 mips_send_command ("initEther\r", -1);
3294 /* Send the load command. */
3295 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3296 strcpy (cmd, load_cmd_prefix);
3297 strcat (cmd, tftp_name);
3299 mips_send_command (cmd, 0);
3301 if (!mips_expect_download ("Downloading from "))
3303 if (!mips_expect_download (tftp_name))
3305 if (!mips_expect_download (", ^C to abort\r\n"))
3309 /* Wait for the stuff that PMON prints after the load has completed.
3310 The timeout value for use in the tftp case (15 seconds) was picked
3311 arbitrarily but might be too small for really large downloads. FIXME. */
3312 if (mips_monitor == MON_LSI)
3314 pmon_check_ack ("termination");
3315 mips_expect_timeout ("Entry address is ", tftp_in_use ? 15 : 2);
3318 mips_expect_timeout ("Entry Address = ", tftp_in_use ? 15 : 2);
3320 sprintf (hexnumber,"%x",final);
3321 mips_expect (hexnumber);
3322 mips_expect ("\r\n");
3323 if (mips_monitor != MON_LSI)
3324 pmon_check_ack ("termination");
3325 mips_expect ("\r\ntotal = 0x");
3326 sprintf (hexnumber,"%x",bintotal);
3327 mips_expect (hexnumber);
3328 if (!mips_expect_download (" bytes\r\n"))
3332 remove (tftp_localname); /* Remove temporary file */
3336 pmon_download (buffer, length)
3341 fwrite (buffer, 1, length, tftp_file);
3343 SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length);
3347 pmon_load_fast (file)
3352 unsigned char *binbuf;
3355 unsigned int csum = 0;
3356 int hashmark = !tftp_in_use;
3361 buffer = (char *)xmalloc(MAXRECSIZE + 1);
3362 binbuf = (unsigned char *)xmalloc(BINCHUNK);
3364 abfd = bfd_openr(file,0);
3367 printf_filtered ("Unable to open file %s\n",file);
3371 if (bfd_check_format(abfd,bfd_object) == 0)
3373 printf_filtered("File is not an object file\n");
3377 /* Setup the required download state: */
3378 mips_send_command ("set dlproto etxack\r", -1);
3379 mips_send_command ("set dlecho off\r", -1);
3380 /* NOTE: We get a "cannot set variable" message if the variable is
3381 already defined to have the argument we give. The code doesn't
3382 care, since it just scans to the next prompt anyway. */
3383 /* Start the download: */
3384 pmon_start_download();
3386 /* Zero the checksum */
3387 sprintf(buffer,"/Kxx\n");
3388 reclen = strlen(buffer);
3389 pmon_download (buffer, reclen);
3390 finished = pmon_check_ack("/Kxx");
3392 for (s = abfd->sections; s && !finished; s = s->next)
3393 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3395 bintotal += s->_raw_size;
3396 final = (s->vma + s->_raw_size);
3398 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int)s->vma,
3399 (unsigned int)(s->vma + s->_raw_size));
3400 gdb_flush (gdb_stdout);
3402 /* Output the starting address */
3403 sprintf(buffer,"/A");
3404 reclen = pmon_makeb64(s->vma,&buffer[2],36,&csum);
3405 buffer[2 + reclen] = '\n';
3406 buffer[3 + reclen] = '\0';
3407 reclen += 3; /* for the initial escape code and carriage return */
3408 pmon_download (buffer, reclen);
3409 finished = pmon_check_ack("/A");
3413 unsigned int binamount;
3414 unsigned int zerofill = 0;
3420 for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) {
3423 binamount = min (BINCHUNK, s->_raw_size - i);
3425 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3427 /* This keeps a rolling checksum, until we decide to output
3429 for (; ((binamount - binptr) > 0);) {
3430 pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
3431 if (reclen >= (MAXRECSIZE - CHECKSIZE)) {
3432 reclen = pmon_checkset (reclen, &bp, &csum);
3433 pmon_download (buffer, reclen);
3434 finished = pmon_check_ack("data record");
3436 zerofill = 0; /* do not transmit pending zerofills */
3441 putchar_unfiltered ('#');
3442 gdb_flush (gdb_stdout);
3446 reclen = 0; /* buffer processed */
3451 /* Ensure no out-standing zerofill requests: */
3453 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3455 /* and then flush the line: */
3457 reclen = pmon_checkset (reclen, &bp, &csum);
3458 /* Currently pmon_checkset outputs the line terminator by
3459 default, so we write out the buffer so far: */
3460 pmon_download (buffer, reclen);
3461 finished = pmon_check_ack("record remnant");
3465 putchar_unfiltered ('\n');
3468 /* Terminate the transfer. We know that we have an empty output
3469 buffer at this point. */
3470 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3471 reclen = strlen (buffer);
3472 pmon_download (buffer, reclen);
3474 if (finished) { /* Ignore the termination message: */
3475 SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc);
3476 } else { /* Deal with termination message: */
3477 pmon_end_download (final, bintotal);
3483 /* mips_load -- download a file. */
3486 mips_load (file, from_tty)
3490 /* Get the board out of remote debugging mode. */
3491 if (mips_exit_debug ())
3492 error ("mips_load: Couldn't get into monitor mode.");
3494 if (mips_monitor != MON_IDT)
3495 pmon_load_fast (file);
3497 mips_load_srec (file);
3501 /* Finally, make the PC point at the start address */
3502 if (mips_monitor != MON_IDT)
3504 /* Work around problem where PMON monitor updates the PC after a load
3505 to a different value than GDB thinks it has. The following ensures
3506 that the write_pc() WILL update the PC value: */
3507 register_valid[PC_REGNUM] = 0;
3510 write_pc (bfd_get_start_address (exec_bfd));
3512 inferior_pid = 0; /* No process now */
3514 /* This is necessary because many things were based on the PC at the time that
3515 we attached to the monitor, which is no longer valid now that we have loaded
3516 new code (and just changed the PC). Another way to do this might be to call
3517 normal_stop, except that the stack may not be valid, and things would get
3518 horribly confused... */
3520 clear_symtab_users ();
3524 /* Pass the command argument as a packet to PMON verbatim. */
3527 pmon_command (args, from_tty)
3531 char buf[DATA_MAXLEN + 1];
3534 sprintf (buf, "0x0 %s", args);
3535 mips_send_packet (buf, 1);
3536 printf_filtered ("Send packet: %s\n", buf);
3538 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3540 printf_filtered ("Received packet: %s\n", buf);
3544 _initialize_remote_mips ()
3546 /* Initialize the fields in mips_ops that are common to all four targets. */
3547 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3548 mips_ops.to_close = mips_close;
3549 mips_ops.to_detach = mips_detach;
3550 mips_ops.to_resume = mips_resume;
3551 mips_ops.to_fetch_registers = mips_fetch_registers;
3552 mips_ops.to_store_registers = mips_store_registers;
3553 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3554 mips_ops.to_xfer_memory = mips_xfer_memory;
3555 mips_ops.to_files_info = mips_files_info;
3556 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3557 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3558 mips_ops.to_kill = mips_kill;
3559 mips_ops.to_load = mips_load;
3560 mips_ops.to_create_inferior = mips_create_inferior;
3561 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3562 mips_ops.to_stratum = process_stratum;
3563 mips_ops.to_has_all_memory = 1;
3564 mips_ops.to_has_memory = 1;
3565 mips_ops.to_has_stack = 1;
3566 mips_ops.to_has_registers = 1;
3567 mips_ops.to_has_execution = 1;
3568 mips_ops.to_magic = OPS_MAGIC;
3570 /* Copy the common fields to all four target vectors. */
3571 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3573 /* Initialize target-specific fields in the target vectors. */
3574 mips_ops.to_shortname = "mips";
3575 mips_ops.to_doc = "\
3576 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3577 The argument is the device it is connected to or, if it contains a colon,\n\
3578 HOST:PORT to access a board over a network";
3579 mips_ops.to_open = mips_open;
3580 mips_ops.to_wait = mips_wait;
3582 pmon_ops.to_shortname = "pmon";
3583 pmon_ops.to_doc = "\
3584 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3585 line. The argument is the device it is connected to or, if it contains a\n\
3586 colon, HOST:PORT to access a board over a network";
3587 pmon_ops.to_open = pmon_open;
3588 pmon_ops.to_wait = mips_wait;
3590 ddb_ops.to_shortname = "ddb";
3592 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3593 line. The first argument is the device it is connected to or, if it contains\n\
3594 a colon, HOST:PORT to access a board over a network. The optional second\n\
3595 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3596 TFTP downloads to the board. The optional third parameter is the local name\n\
3597 of the TFTP temporary file, if it differs from the filename seen by the board.";
3598 ddb_ops.to_open = ddb_open;
3599 ddb_ops.to_wait = mips_wait;
3601 lsi_ops.to_shortname = "lsi";
3602 lsi_ops.to_doc = pmon_ops.to_doc;
3603 lsi_ops.to_open = lsi_open;
3604 lsi_ops.to_wait = mips_wait;
3606 /* Add the targets. */
3607 add_target (&mips_ops);
3608 add_target (&pmon_ops);
3609 add_target (&ddb_ops);
3610 add_target (&lsi_ops);
3613 add_set_cmd ("timeout", no_class, var_zinteger,
3614 (char *) &mips_receive_wait,
3615 "Set timeout in seconds for remote MIPS serial I/O.",
3620 add_set_cmd ("retransmit-timeout", no_class, var_zinteger,
3621 (char *) &mips_retransmit_wait,
3622 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3623 This is the number of seconds to wait for an acknowledgement to a packet\n\
3624 before resending the packet.", &setlist),
3628 add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
3629 (char *) &mips_syn_garbage,
3630 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3631 This is the maximum number of characters GDB will ignore when trying to\n\
3632 synchronize with the remote system. A value of -1 means that there is no limit\n\
3633 (Note that these characters are printed out even though they are ignored.)",
3638 (add_set_cmd ("monitor-prompt", class_obscure, var_string,
3639 (char *) &mips_monitor_prompt,
3640 "Set the prompt that GDB expects from the monitor.",
3645 add_set_cmd ("monitor-warnings", class_obscure, var_zinteger,
3646 (char *)&monitor_warnings,
3647 "Set printing of monitor warnings.\n"
3648 "When enabled, monitor warnings about hardware breakpoints "
3649 "will be displayed.",
3653 add_com ("pmon <command>", class_obscure, pmon_command,
3654 "Send a packet to PMON (must be in debug mode).");