1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
31 #include "remote-utils.h"
32 #include "gdb_string.h"
35 #include <sys/types.h>
40 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
42 #define S_IROTH S_IREAD
47 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
48 types passed by breakpoint.c to target_insert_watchpoint.
49 Value 3 is our own invention, and is used for ordinary instruction
50 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
60 /* Prototypes for local functions. */
62 static int mips_readchar (int timeout);
64 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
67 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
68 int *pch, int timeout);
70 static int mips_cksum (const unsigned char *hdr,
71 const unsigned char *data, int len);
73 static void mips_send_packet (const char *s, int get_ack);
75 static void mips_send_command (const char *cmd, int prompt);
77 static int mips_receive_packet (char *buff, int throw_error, int timeout);
79 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
80 int *perr, int timeout, char *buff);
82 static void mips_initialize (void);
84 static void mips_open (char *name, int from_tty);
86 static void pmon_open (char *name, int from_tty);
88 static void ddb_open (char *name, int from_tty);
90 static void lsi_open (char *name, int from_tty);
92 static void mips_close (int quitting);
94 static void mips_detach (char *args, int from_tty);
96 static void mips_resume (int pid, int step, enum target_signal siggnal);
98 static int mips_wait (int pid, struct target_waitstatus *status);
100 static int mips_map_regno (int regno);
102 static void mips_fetch_registers (int regno);
104 static void mips_prepare_to_store (void);
106 static void mips_store_registers (int regno);
108 static unsigned int mips_fetch_word (CORE_ADDR addr);
110 static int mips_store_word (CORE_ADDR addr, unsigned int value,
113 static int mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
115 struct mem_attrib *attrib,
116 struct target_ops *target);
118 static void mips_files_info (struct target_ops *ignore);
120 static void mips_create_inferior (char *execfile, char *args, char **env);
122 static void mips_mourn_inferior (void);
124 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
126 static int pmon_zeroset (int recsize, char **buff, int *amount,
127 unsigned int *chksum);
129 static int pmon_checkset (int recsize, char **buff, int *value);
131 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
132 int *inptr, int inamount, int *recsize,
133 unsigned int *csum, unsigned int *zerofill);
135 static int pmon_check_ack (char *mesg);
137 static void pmon_start_download (void);
139 static void pmon_end_download (int final, int bintotal);
141 static void pmon_download (char *buffer, int length);
143 static void pmon_load_fast (char *file);
145 static void mips_load (char *file, int from_tty);
147 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
148 unsigned char *myaddr, int len);
150 static int set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
152 static int clear_breakpoint (CORE_ADDR addr, int len, enum break_type type);
154 static int common_breakpoint (int set, CORE_ADDR addr, int len,
155 enum break_type type);
157 /* Forward declarations. */
158 extern struct target_ops mips_ops;
159 extern struct target_ops pmon_ops;
160 extern struct target_ops ddb_ops;
162 /* The MIPS remote debugging interface is built on top of a simple
163 packet protocol. Each packet is organized as follows:
165 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
166 may not appear anywhere else in the packet. Any time a SYN is
167 seen, a new packet should be assumed to have begun.
170 This byte contains the upper five bits of the logical length
171 of the data section, plus a single bit indicating whether this
172 is a data packet or an acknowledgement. The documentation
173 indicates that this bit is 1 for a data packet, but the actual
174 board uses 1 for an acknowledgement. The value of the byte is
175 0x40 + (ack ? 0x20 : 0) + (len >> 6)
176 (we always have 0 <= len < 1024). Acknowledgement packets do
177 not carry data, and must have a data length of 0.
179 LEN1 This byte contains the lower six bits of the logical length of
180 the data section. The value is
183 SEQ This byte contains the six bit sequence number of the packet.
186 An acknowlegment packet contains the sequence number of the
187 packet being acknowledged plus 1 modulo 64. Data packets are
188 transmitted in sequence. There may only be one outstanding
189 unacknowledged data packet at a time. The sequence numbers
190 are independent in each direction. If an acknowledgement for
191 the previous packet is received (i.e., an acknowledgement with
192 the sequence number of the packet just sent) the packet just
193 sent should be retransmitted. If no acknowledgement is
194 received within a timeout period, the packet should be
195 retransmitted. This has an unfortunate failure condition on a
196 high-latency line, as a delayed acknowledgement may lead to an
197 endless series of duplicate packets.
199 DATA The actual data bytes follow. The following characters are
200 escaped inline with DLE (ASCII 020, or ^P):
206 The additional DLE characters are not counted in the logical
207 length stored in the TYPE_LEN and LEN1 bytes.
212 These bytes contain an 18 bit checksum of the complete
213 contents of the packet excluding the SEQ byte and the
214 CSUM[123] bytes. The checksum is simply the twos complement
215 addition of all the bytes treated as unsigned characters. The
216 values of the checksum bytes are:
217 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
218 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
219 CSUM3: 0x40 + (cksum & 0x3f)
221 It happens that the MIPS remote debugging protocol always
222 communicates with ASCII strings. Because of this, this
223 implementation doesn't bother to handle the DLE quoting mechanism,
224 since it will never be required. */
228 /* The SYN character which starts each packet. */
231 /* The 0x40 used to offset each packet (this value ensures that all of
232 the header and trailer bytes, other than SYN, are printable ASCII
234 #define HDR_OFFSET 0x40
236 /* The indices of the bytes in the packet header. */
237 #define HDR_INDX_SYN 0
238 #define HDR_INDX_TYPE_LEN 1
239 #define HDR_INDX_LEN1 2
240 #define HDR_INDX_SEQ 3
243 /* The data/ack bit in the TYPE_LEN header byte. */
244 #define TYPE_LEN_DA_BIT 0x20
245 #define TYPE_LEN_DATA 0
246 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
248 /* How to compute the header bytes. */
249 #define HDR_SET_SYN(data, len, seq) (SYN)
250 #define HDR_SET_TYPE_LEN(data, len, seq) \
252 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
253 + (((len) >> 6) & 0x1f))
254 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
255 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
257 /* Check that a header byte is reasonable. */
258 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
260 /* Get data from the header. These macros evaluate their argument
262 #define HDR_IS_DATA(hdr) \
263 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
264 #define HDR_GET_LEN(hdr) \
265 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
266 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
268 /* The maximum data length. */
269 #define DATA_MAXLEN 1023
271 /* The trailer offset. */
272 #define TRLR_OFFSET HDR_OFFSET
274 /* The indices of the bytes in the packet trailer. */
275 #define TRLR_INDX_CSUM1 0
276 #define TRLR_INDX_CSUM2 1
277 #define TRLR_INDX_CSUM3 2
278 #define TRLR_LENGTH 3
280 /* How to compute the trailer bytes. */
281 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
282 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
283 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
285 /* Check that a trailer byte is reasonable. */
286 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
288 /* Get data from the trailer. This evaluates its argument multiple
290 #define TRLR_GET_CKSUM(trlr) \
291 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
292 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
293 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
295 /* The sequence number modulos. */
296 #define SEQ_MODULOS (64)
298 /* PMON commands to load from the serial port or UDP socket. */
299 #define LOAD_CMD "load -b -s tty0\r"
300 #define LOAD_CMD_UDP "load -b -s udp\r"
302 /* The target vectors for the four different remote MIPS targets.
303 These are initialized with code in _initialize_remote_mips instead
304 of static initializers, to make it easier to extend the target_ops
306 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
308 enum mips_monitor_type
310 /* IDT/SIM monitor being used: */
312 /* PMON monitor being used: */
313 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
314 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
315 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
316 /* Last and unused value, for sizing vectors, etc. */
319 static enum mips_monitor_type mips_monitor = MON_LAST;
321 /* The monitor prompt text. If the user sets the PMON prompt
322 to some new value, the GDB `set monitor-prompt' command must also
323 be used to inform GDB about the expected prompt. Otherwise, GDB
324 will not be able to connect to PMON in mips_initialize().
325 If the `set monitor-prompt' command is not used, the expected
326 default prompt will be set according the target:
333 static char *mips_monitor_prompt;
335 /* Set to 1 if the target is open. */
336 static int mips_is_open;
338 /* Currently active target description (if mips_is_open == 1) */
339 static struct target_ops *current_ops;
341 /* Set to 1 while the connection is being initialized. */
342 static int mips_initializing;
344 /* Set to 1 while the connection is being brought down. */
345 static int mips_exiting;
347 /* The next sequence number to send. */
348 static unsigned int mips_send_seq;
350 /* The next sequence number we expect to receive. */
351 static unsigned int mips_receive_seq;
353 /* The time to wait before retransmitting a packet, in seconds. */
354 static int mips_retransmit_wait = 3;
356 /* The number of times to try retransmitting a packet before giving up. */
357 static int mips_send_retries = 10;
359 /* The number of garbage characters to accept when looking for an
360 SYN for the next packet. */
361 static int mips_syn_garbage = 10;
363 /* The time to wait for a packet, in seconds. */
364 static int mips_receive_wait = 5;
366 /* Set if we have sent a packet to the board but have not yet received
368 static int mips_need_reply = 0;
370 /* Handle used to access serial I/O stream. */
371 static serial_t mips_desc;
373 /* UDP handle used to download files to target. */
374 static serial_t udp_desc;
375 static int udp_in_use;
377 /* TFTP filename used to download files to DDB board, in the form
379 static char *tftp_name; /* host:filename */
380 static char *tftp_localname; /* filename portion of above */
381 static int tftp_in_use;
382 static FILE *tftp_file;
384 /* Counts the number of times the user tried to interrupt the target (usually
386 static int interrupt_count;
388 /* If non-zero, means that the target is running. */
389 static int mips_wait_flag = 0;
391 /* If non-zero, monitor supports breakpoint commands. */
392 static int monitor_supports_breakpoints = 0;
394 /* Data cache header. */
396 #if 0 /* not used (yet?) */
397 static DCACHE *mips_dcache;
400 /* Non-zero means that we've just hit a read or write watchpoint */
401 static int hit_watchpoint;
403 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
404 The table is indexed by a breakpoint number, which is an integer
405 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
407 #define MAX_LSI_BREAKPOINTS 256
408 struct lsi_breakpoint_info
410 enum break_type type; /* type of breakpoint */
411 CORE_ADDR addr; /* address of breakpoint */
412 int len; /* length of region being watched */
413 unsigned long value; /* value to watch */
415 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
417 /* Error/warning codes returned by LSI PMON for breakpoint commands.
418 Warning values may be ORed together; error values may not. */
419 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
420 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
421 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
422 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
424 #define E_ERR 0x200 /* This bit is set if the error code is an error */
425 #define E_BPT 0x200 /* error: No such breakpoint number */
426 #define E_RGE 0x201 /* error: Range is not supported */
427 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
428 #define E_OUT 0x203 /* error: Out of hardware resources */
429 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
433 int code; /* error code */
434 char *string; /* string associated with this code */
437 struct lsi_error lsi_warning_table[] =
439 {W_MSK, "Range feature is supported via mask"},
440 {W_VAL, "Value check is not supported in hardware"},
441 {W_QAL, "Requested qualifiers are not supported in hardware"},
445 struct lsi_error lsi_error_table[] =
447 {E_BPT, "No such breakpoint number"},
448 {E_RGE, "Range is not supported"},
449 {E_QAL, "The requested qualifiers can not be used"},
450 {E_OUT, "Out of hardware resources"},
451 {E_NON, "Hardware breakpoint not supported"},
455 /* Set to 1 with the 'set monitor-warnings' command to enable printing
456 of warnings returned by PMON when hardware breakpoints are used. */
457 static int monitor_warnings;
464 SERIAL_CLOSE (mips_desc);
468 SERIAL_CLOSE (udp_desc);
474 /* Handle low-level error that we can't recover from. Note that just
475 error()ing out from target_wait or some such low-level place will cause
476 all hell to break loose--the rest of GDB will tend to get left in an
477 inconsistent state. */
480 mips_error (char *string,...)
484 va_start (args, string);
486 target_terminal_ours ();
487 wrap_here (""); /* Force out any buffered output */
488 gdb_flush (gdb_stdout);
490 fprintf_filtered (gdb_stderr, error_pre_print);
491 vfprintf_filtered (gdb_stderr, string, args);
492 fprintf_filtered (gdb_stderr, "\n");
494 gdb_flush (gdb_stderr);
496 /* Clean up in such a way that mips_close won't try to talk to the
497 board (it almost surely won't work since we weren't able to talk to
501 printf_unfiltered ("Ending remote MIPS debugging.\n");
502 target_mourn_inferior ();
504 return_to_top_level (RETURN_ERROR);
507 /* putc_readable - print a character, displaying non-printable chars in
508 ^x notation or in hex. */
511 fputc_readable (int ch, struct ui_file *file)
514 fputc_unfiltered ('\n', file);
516 fprintf_unfiltered (file, "\\r");
517 else if (ch < 0x20) /* ASCII control character */
518 fprintf_unfiltered (file, "^%c", ch + '@');
519 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
520 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
522 fputc_unfiltered (ch, file);
526 /* puts_readable - print a string, displaying non-printable chars in
527 ^x notation or in hex. */
530 fputs_readable (const char *string, struct ui_file *file)
534 while ((c = *string++) != '\0')
535 fputc_readable (c, file);
539 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
540 timed out. TIMEOUT specifies timeout value in seconds.
544 mips_expect_timeout (const char *string, int timeout)
546 const char *p = string;
550 fprintf_unfiltered (gdb_stdlog, "Expected \"");
551 fputs_readable (string, gdb_stdlog);
552 fprintf_unfiltered (gdb_stdlog, "\", got \"");
560 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
561 were waiting for the mips_monitor_prompt... */
563 c = SERIAL_READCHAR (mips_desc, timeout);
565 if (c == SERIAL_TIMEOUT)
568 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
573 fputc_readable (c, gdb_stdlog);
581 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
594 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
595 timed out. The timeout value is hard-coded to 2 seconds. Use
596 mips_expect_timeout if a different timeout value is needed.
600 mips_expect (const char *string)
602 return mips_expect_timeout (string, remote_timeout);
605 /* Read the required number of characters into the given buffer (which
606 is assumed to be large enough). The only failure is a timeout. */
608 mips_getstring (char *string, int n)
616 c = SERIAL_READCHAR (mips_desc, remote_timeout);
618 if (c == SERIAL_TIMEOUT)
620 fprintf_unfiltered (gdb_stderr,
621 "Failed to read %d characters from target (TIMEOUT)\n", n);
634 /* Read a character from the remote, aborting on error. Returns
635 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
636 returns). FIXME: If we see the string mips_monitor_prompt from
637 the board, then we are debugging on the main console port, and we
638 have somehow dropped out of remote debugging mode. In this case,
639 we automatically go back in to remote debugging mode. This is a
640 hack, put in because I can't find any way for a program running on
641 the remote board to terminate without also ending remote debugging
642 mode. I assume users won't have any trouble with this; for one
643 thing, the IDT documentation generally assumes that the remote
644 debugging port is not the console port. This is, however, very
645 convenient for DejaGnu when you only have one connected serial
649 mips_readchar (int timeout)
652 static int state = 0;
653 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
659 if (i == -1 && watchdog > 0)
663 if (state == mips_monitor_prompt_len)
665 ch = SERIAL_READCHAR (mips_desc, timeout);
667 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
669 target_mourn_inferior ();
670 error ("Watchdog has expired. Target detached.\n");
673 if (ch == SERIAL_EOF)
674 mips_error ("End of file from remote");
675 if (ch == SERIAL_ERROR)
676 mips_error ("Error reading from remote: %s", safe_strerror (errno));
677 if (remote_debug > 1)
679 /* Don't use _filtered; we can't deal with a QUIT out of
680 target_wait, and I think this might be called from there. */
681 if (ch != SERIAL_TIMEOUT)
682 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
684 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
687 /* If we have seen mips_monitor_prompt and we either time out, or
688 we see a @ (which was echoed from a packet we sent), reset the
689 board as described above. The first character in a packet after
690 the SYN (which is not echoed) is always an @ unless the packet is
691 more than 64 characters long, which ours never are. */
692 if ((ch == SERIAL_TIMEOUT || ch == '@')
693 && state == mips_monitor_prompt_len
694 && !mips_initializing
697 if (remote_debug > 0)
698 /* Don't use _filtered; we can't deal with a QUIT out of
699 target_wait, and I think this might be called from there. */
700 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
707 /* At this point, about the only thing we can do is abort the command
708 in progress and get back to command level as quickly as possible. */
710 error ("Remote board reset, debug protocol re-initialized.");
713 if (ch == mips_monitor_prompt[state])
721 /* Get a packet header, putting the data in the supplied buffer.
722 PGARBAGE is a pointer to the number of garbage characters received
723 so far. CH is the last character received. Returns 0 for success,
724 or -1 for timeout. */
727 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
733 /* Wait for a SYN. mips_syn_garbage is intended to prevent
734 sitting here indefinitely if the board sends us one garbage
735 character per second. ch may already have a value from the
736 last time through the loop. */
739 ch = mips_readchar (timeout);
740 if (ch == SERIAL_TIMEOUT)
744 /* Printing the character here lets the user of gdb see
745 what the program is outputting, if the debugging is
746 being done on the console port. Don't use _filtered:
747 we can't deal with a QUIT out of target_wait and
748 buffered target output confuses the user. */
749 if (!mips_initializing || remote_debug > 0)
751 if (isprint (ch) || isspace (ch))
753 fputc_unfiltered (ch, gdb_stdtarg);
757 fputc_readable (ch, gdb_stdtarg);
759 gdb_flush (gdb_stdtarg);
762 /* Only count unprintable characters. */
763 if (! (isprint (ch) || isspace (ch)))
766 if (mips_syn_garbage > 0
767 && *pgarbage > mips_syn_garbage)
768 mips_error ("Debug protocol failure: more than %d characters before a sync.",
773 /* Get the packet header following the SYN. */
774 for (i = 1; i < HDR_LENGTH; i++)
776 ch = mips_readchar (timeout);
777 if (ch == SERIAL_TIMEOUT)
779 /* Make sure this is a header byte. */
780 if (ch == SYN || !HDR_CHECK (ch))
786 /* If we got the complete header, we can return. Otherwise we
787 loop around and keep looking for SYN. */
793 /* Get a packet header, putting the data in the supplied buffer.
794 PGARBAGE is a pointer to the number of garbage characters received
795 so far. The last character read is returned in *PCH. Returns 0
796 for success, -1 for timeout, -2 for error. */
799 mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout)
804 for (i = 0; i < TRLR_LENGTH; i++)
806 ch = mips_readchar (timeout);
808 if (ch == SERIAL_TIMEOUT)
810 if (!TRLR_CHECK (ch))
817 /* Get the checksum of a packet. HDR points to the packet header.
818 DATA points to the packet data. LEN is the length of DATA. */
821 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
823 register const unsigned char *p;
829 /* The initial SYN is not included in the checksum. */
843 /* Send a packet containing the given ASCII string. */
846 mips_send_packet (const char *s, int get_ack)
848 /* unsigned */ int len;
849 unsigned char *packet;
854 if (len > DATA_MAXLEN)
855 mips_error ("MIPS protocol data packet too long: %s", s);
857 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
859 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
860 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
861 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
862 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
864 memcpy (packet + HDR_LENGTH, s, len);
866 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
867 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
868 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
869 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
871 /* Increment the sequence number. This will set mips_send_seq to
872 the sequence number we expect in the acknowledgement. */
873 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
875 /* We can only have one outstanding data packet, so we just wait for
876 the acknowledgement here. Keep retransmitting the packet until
877 we get one, or until we've tried too many times. */
878 for (try = 0; try < mips_send_retries; try++)
883 if (remote_debug > 0)
885 /* Don't use _filtered; we can't deal with a QUIT out of
886 target_wait, and I think this might be called from there. */
887 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
888 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
891 if (SERIAL_WRITE (mips_desc, packet,
892 HDR_LENGTH + len + TRLR_LENGTH) != 0)
893 mips_error ("write to target failed: %s", safe_strerror (errno));
902 unsigned char hdr[HDR_LENGTH + 1];
903 unsigned char trlr[TRLR_LENGTH + 1];
907 /* Get the packet header. If we time out, resend the data
909 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
915 /* If we get a data packet, assume it is a duplicate and
916 ignore it. FIXME: If the acknowledgement is lost, this
917 data packet may be the packet the remote sends after the
919 if (HDR_IS_DATA (hdr))
923 /* Ignore any errors raised whilst attempting to ignore
926 len = HDR_GET_LEN (hdr);
928 for (i = 0; i < len; i++)
932 rch = mips_readchar (remote_timeout);
938 if (rch == SERIAL_TIMEOUT)
940 /* ignore the character */
944 (void) mips_receive_trailer (trlr, &garbage, &ch,
947 /* We don't bother checking the checksum, or providing an
948 ACK to the packet. */
952 /* If the length is not 0, this is a garbled packet. */
953 if (HDR_GET_LEN (hdr) != 0)
956 /* Get the packet trailer. */
957 err = mips_receive_trailer (trlr, &garbage, &ch,
958 mips_retransmit_wait);
960 /* If we timed out, resend the data packet. */
964 /* If we got a bad character, reread the header. */
968 /* If the checksum does not match the trailer checksum, this
969 is a bad packet; ignore it. */
970 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
971 != TRLR_GET_CKSUM (trlr))
974 if (remote_debug > 0)
976 hdr[HDR_LENGTH] = '\0';
977 trlr[TRLR_LENGTH] = '\0';
978 /* Don't use _filtered; we can't deal with a QUIT out of
979 target_wait, and I think this might be called from there. */
980 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
981 HDR_GET_SEQ (hdr), hdr + 1, trlr);
984 /* If this ack is for the current packet, we're done. */
985 seq = HDR_GET_SEQ (hdr);
986 if (seq == mips_send_seq)
989 /* If this ack is for the last packet, resend the current
991 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
994 /* Otherwise this is a bad ack; ignore it. Increment the
995 garbage count to ensure that we do not stay in this loop
1001 mips_error ("Remote did not acknowledge packet");
1004 /* Receive and acknowledge a packet, returning the data in BUFF (which
1005 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1006 implies that only the sender retransmits packets, so this code just
1007 waits silently for a packet. It returns the length of the received
1008 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1009 don't print an error message and return -1. */
1012 mips_receive_packet (char *buff, int throw_error, int timeout)
1017 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1024 unsigned char hdr[HDR_LENGTH];
1025 unsigned char trlr[TRLR_LENGTH];
1029 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1032 mips_error ("Timed out waiting for remote packet");
1039 /* An acknowledgement is probably a duplicate; ignore it. */
1040 if (!HDR_IS_DATA (hdr))
1042 len = HDR_GET_LEN (hdr);
1043 /* Check if the length is valid for an ACK, we may aswell
1044 try and read the remainder of the packet: */
1047 /* Ignore the error condition, since we are going to
1048 ignore the packet anyway. */
1049 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1051 /* Don't use _filtered; we can't deal with a QUIT out of
1052 target_wait, and I think this might be called from there. */
1053 if (remote_debug > 0)
1054 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1058 len = HDR_GET_LEN (hdr);
1059 for (i = 0; i < len; i++)
1063 rch = mips_readchar (timeout);
1069 if (rch == SERIAL_TIMEOUT)
1072 mips_error ("Timed out waiting for remote packet");
1081 /* Don't use _filtered; we can't deal with a QUIT out of
1082 target_wait, and I think this might be called from there. */
1083 if (remote_debug > 0)
1084 fprintf_unfiltered (gdb_stdlog,
1085 "Got new SYN after %d chars (wanted %d)\n",
1090 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1094 mips_error ("Timed out waiting for packet");
1100 /* Don't use _filtered; we can't deal with a QUIT out of
1101 target_wait, and I think this might be called from there. */
1102 if (remote_debug > 0)
1103 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1107 /* If this is the wrong sequence number, ignore it. */
1108 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1110 /* Don't use _filtered; we can't deal with a QUIT out of
1111 target_wait, and I think this might be called from there. */
1112 if (remote_debug > 0)
1113 fprintf_unfiltered (gdb_stdlog,
1114 "Ignoring sequence number %d (want %d)\n",
1115 HDR_GET_SEQ (hdr), mips_receive_seq);
1119 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1122 if (remote_debug > 0)
1123 /* Don't use _filtered; we can't deal with a QUIT out of
1124 target_wait, and I think this might be called from there. */
1125 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1126 mips_cksum (hdr, buff, len),
1127 TRLR_GET_CKSUM (trlr));
1129 /* The checksum failed. Send an acknowledgement for the
1130 previous packet to tell the remote to resend the packet. */
1131 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1132 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1133 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1134 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1136 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1138 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1139 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1140 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1142 if (remote_debug > 0)
1144 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1145 /* Don't use _filtered; we can't deal with a QUIT out of
1146 target_wait, and I think this might be called from there. */
1147 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1151 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1154 mips_error ("write to target failed: %s", safe_strerror (errno));
1160 if (remote_debug > 0)
1163 /* Don't use _filtered; we can't deal with a QUIT out of
1164 target_wait, and I think this might be called from there. */
1165 printf_unfiltered ("Got packet \"%s\"\n", buff);
1168 /* We got the packet. Send an acknowledgement. */
1169 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1171 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1172 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1173 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1174 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1176 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1178 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1179 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1180 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1182 if (remote_debug > 0)
1184 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1185 /* Don't use _filtered; we can't deal with a QUIT out of
1186 target_wait, and I think this might be called from there. */
1187 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1191 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1194 mips_error ("write to target failed: %s", safe_strerror (errno));
1202 /* Optionally send a request to the remote system and optionally wait
1203 for the reply. This implements the remote debugging protocol,
1204 which is built on top of the packet protocol defined above. Each
1205 request has an ADDR argument and a DATA argument. The following
1206 requests are defined:
1208 \0 don't send a request; just wait for a reply
1209 i read word from instruction space at ADDR
1210 d read word from data space at ADDR
1211 I write DATA to instruction space at ADDR
1212 D write DATA to data space at ADDR
1213 r read register number ADDR
1214 R set register number ADDR to value DATA
1215 c continue execution (if ADDR != 1, set pc to ADDR)
1216 s single step (if ADDR != 1, set pc to ADDR)
1218 The read requests return the value requested. The write requests
1219 return the previous value in the changed location. The execution
1220 requests return a UNIX wait value (the approximate signal which
1221 caused execution to stop is in the upper eight bits).
1223 If PERR is not NULL, this function waits for a reply. If an error
1224 occurs, it sets *PERR to 1 and sets errno according to what the
1225 target board reports. */
1228 mips_request (int cmd,
1235 char myBuff[DATA_MAXLEN + 1];
1240 unsigned long rresponse;
1242 if (buff == (char *) NULL)
1247 if (mips_need_reply)
1248 internal_error ("mips_request: Trying to send command before reply");
1249 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data));
1250 mips_send_packet (buff, 1);
1251 mips_need_reply = 1;
1254 if (perr == (int *) NULL)
1257 if (!mips_need_reply)
1258 internal_error ("mips_request: Trying to get reply before command");
1260 mips_need_reply = 0;
1262 len = mips_receive_packet (buff, 1, timeout);
1265 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1266 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1267 || (cmd != '\0' && rcmd != cmd))
1268 mips_error ("Bad response from remote board");
1274 /* FIXME: This will returns MIPS errno numbers, which may or may
1275 not be the same as errno values used on other systems. If
1276 they stick to common errno values, they will be the same, but
1277 if they don't, they must be translated. */
1288 mips_initialize_cleanups (PTR arg)
1290 mips_initializing = 0;
1294 mips_exit_cleanups (PTR arg)
1300 mips_send_command (const char *cmd, int prompt)
1302 SERIAL_WRITE (mips_desc, cmd, strlen (cmd));
1306 mips_expect (mips_monitor_prompt);
1309 /* Enter remote (dbx) debug mode: */
1311 mips_enter_debug (void)
1313 /* Reset the sequence numbers, ready for the new debug sequence: */
1315 mips_receive_seq = 0;
1317 if (mips_monitor != MON_IDT)
1318 mips_send_command ("debug\r", 0);
1319 else /* assume IDT monitor by default */
1320 mips_send_command ("db tty0\r", 0);
1323 SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1);
1325 /* We don't need to absorb any spurious characters here, since the
1326 mips_receive_header will eat up a reasonable number of characters
1327 whilst looking for the SYN, however this avoids the "garbage"
1328 being displayed to the user. */
1329 if (mips_monitor != MON_IDT)
1333 char buff[DATA_MAXLEN + 1];
1334 if (mips_receive_packet (buff, 1, 3) < 0)
1335 mips_error ("Failed to initialize (didn't receive packet).");
1339 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1341 mips_exit_debug (void)
1344 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1348 if (mips_monitor != MON_IDT)
1350 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1351 so we do not get a reply to this command: */
1352 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1353 mips_need_reply = 0;
1354 if (!mips_expect (" break!"))
1358 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1360 if (!mips_expect (mips_monitor_prompt))
1363 do_cleanups (old_cleanups);
1368 /* Initialize a new connection to the MIPS board, and make sure we are
1369 really connected. */
1372 mips_initialize (void)
1375 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1378 /* What is this code doing here? I don't see any way it can happen, and
1379 it might mean mips_initializing didn't get cleared properly.
1380 So I'll make it a warning. */
1382 if (mips_initializing)
1384 warning ("internal error: mips_initialize called twice");
1389 mips_initializing = 1;
1391 /* At this point, the packit protocol isn't responding. We'll try getting
1392 into the monitor, and restarting the protocol. */
1394 /* Force the system into the monitor. After this we *should* be at
1395 the mips_monitor_prompt. */
1396 if (mips_monitor != MON_IDT)
1397 j = 0; /* start by checking if we are already at the prompt */
1399 j = 1; /* start by sending a break */
1404 case 0: /* First, try sending a CR */
1405 SERIAL_FLUSH_INPUT (mips_desc);
1406 SERIAL_WRITE (mips_desc, "\r", 1);
1408 case 1: /* First, try sending a break */
1409 SERIAL_SEND_BREAK (mips_desc);
1411 case 2: /* Then, try a ^C */
1412 SERIAL_WRITE (mips_desc, "\003", 1);
1414 case 3: /* Then, try escaping from download */
1416 if (mips_monitor != MON_IDT)
1420 /* We shouldn't need to send multiple termination
1421 sequences, since the target performs line (or
1422 block) reads, and then processes those
1423 packets. In-case we were downloading a large packet
1424 we flush the output buffer before inserting a
1425 termination sequence. */
1426 SERIAL_FLUSH_OUTPUT (mips_desc);
1427 sprintf (tbuff, "\r/E/E\r");
1428 SERIAL_WRITE (mips_desc, tbuff, 6);
1435 /* We are possibly in binary download mode, having
1436 aborted in the middle of an S-record. ^C won't
1437 work because of binary mode. The only reliable way
1438 out is to send enough termination packets (8 bytes)
1439 to fill up and then overflow the largest size
1440 S-record (255 bytes in this case). This amounts to
1444 mips_make_srec (srec, '7', 0, NULL, 0);
1446 for (i = 1; i <= 33; i++)
1448 SERIAL_WRITE (mips_desc, srec, 8);
1450 if (SERIAL_READCHAR (mips_desc, 0) >= 0)
1451 break; /* Break immediatly if we get something from
1458 mips_error ("Failed to initialize.");
1461 if (mips_expect (mips_monitor_prompt))
1465 if (mips_monitor != MON_IDT)
1467 /* Sometimes PMON ignores the first few characters in the first
1468 command sent after a load. Sending a blank command gets
1470 mips_send_command ("\r", -1);
1472 /* Ensure the correct target state: */
1473 if (mips_monitor != MON_LSI)
1474 mips_send_command ("set regsize 64\r", -1);
1475 mips_send_command ("set hostport tty0\r", -1);
1476 mips_send_command ("set brkcmd \"\"\r", -1);
1477 /* Delete all the current breakpoints: */
1478 mips_send_command ("db *\r", -1);
1479 /* NOTE: PMON does not have breakpoint support through the
1480 "debug" mode, only at the monitor command-line. */
1483 mips_enter_debug ();
1485 /* Clear all breakpoints: */
1486 if ((mips_monitor == MON_IDT
1487 && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1488 || mips_monitor == MON_LSI)
1489 monitor_supports_breakpoints = 1;
1491 monitor_supports_breakpoints = 0;
1493 do_cleanups (old_cleanups);
1495 /* If this doesn't call error, we have connected; we don't care if
1496 the request itself succeeds or fails. */
1498 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1499 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1500 select_frame (get_current_frame (), 0);
1503 /* Open a connection to the remote board. */
1505 common_open (struct target_ops *ops, char *name, int from_tty,
1506 enum mips_monitor_type new_monitor,
1507 const char *new_monitor_prompt)
1510 char *serial_port_name;
1511 char *remote_name = 0;
1512 char *local_name = 0;
1517 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1518 device is attached to the target board (e.g., /dev/ttya).\n"
1519 "If you want to use TFTP to download to the board, specify the name of a\n"
1520 "temporary file to be used by GDB for downloads as the second argument.\n"
1521 "This filename must be in the form host:filename, where host is the name\n"
1522 "of the host running the TFTP server, and the file must be readable by the\n"
1523 "world. If the local name of the temporary file differs from the name as\n"
1524 "seen from the board via TFTP, specify that name as the third parameter.\n");
1526 /* Parse the serial port name, the optional TFTP name, and the
1527 optional local TFTP name. */
1528 if ((argv = buildargv (name)) == NULL)
1530 make_cleanup_freeargv (argv);
1532 serial_port_name = xstrdup (argv[0]);
1533 if (argv[1]) /* remote TFTP name specified? */
1535 remote_name = argv[1];
1536 if (argv[2]) /* local TFTP filename specified? */
1537 local_name = argv[2];
1540 target_preopen (from_tty);
1543 unpush_target (current_ops);
1545 /* Open and initialize the serial port. */
1546 mips_desc = SERIAL_OPEN (serial_port_name);
1547 if (mips_desc == (serial_t) NULL)
1548 perror_with_name (serial_port_name);
1550 if (baud_rate != -1)
1552 if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
1554 SERIAL_CLOSE (mips_desc);
1555 perror_with_name (serial_port_name);
1559 SERIAL_RAW (mips_desc);
1561 /* Open and initialize the optional download port. If it is in the form
1562 hostname#portnumber, it's a UDP socket. If it is in the form
1563 hostname:filename, assume it's the TFTP filename that must be
1564 passed to the DDB board to tell it where to get the load file. */
1567 if (strchr (remote_name, '#'))
1569 udp_desc = SERIAL_OPEN (remote_name);
1571 perror_with_name ("Unable to open UDP port");
1576 /* Save the remote and local names of the TFTP temp file. If
1577 the user didn't specify a local name, assume it's the same
1578 as the part of the remote name after the "host:". */
1582 xfree (tftp_localname);
1583 if (local_name == NULL)
1584 if ((local_name = strchr (remote_name, ':')) != NULL)
1585 local_name++; /* skip over the colon */
1586 if (local_name == NULL)
1587 local_name = remote_name; /* local name same as remote name */
1588 tftp_name = xstrdup (remote_name);
1589 tftp_localname = xstrdup (local_name);
1597 /* Reset the expected monitor prompt if it's never been set before. */
1598 if (mips_monitor_prompt == NULL)
1599 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1600 mips_monitor = new_monitor;
1605 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1607 /* Switch to using remote target now. */
1610 /* FIXME: Should we call start_remote here? */
1612 /* Try to figure out the processor model if possible. */
1613 ptype = mips_read_processor_type ();
1615 mips_set_processor_type_command (xstrdup (ptype), 0);
1617 /* This is really the job of start_remote however, that makes an assumption
1618 that the target is about to print out a status message of some sort. That
1619 doesn't happen here (in fact, it may not be possible to get the monitor to
1620 send the appropriate packet). */
1622 flush_cached_frames ();
1623 registers_changed ();
1624 stop_pc = read_pc ();
1625 set_current_frame (create_new_frame (read_fp (), stop_pc));
1626 select_frame (get_current_frame (), 0);
1627 print_stack_frame (selected_frame, -1, 1);
1628 xfree (serial_port_name);
1632 mips_open (char *name, int from_tty)
1634 const char *monitor_prompt = NULL;
1635 if (TARGET_ARCHITECTURE != NULL
1636 && TARGET_ARCHITECTURE->arch == bfd_arch_mips)
1638 switch (TARGET_ARCHITECTURE->mach)
1640 case bfd_mach_mips4100:
1641 case bfd_mach_mips4300:
1642 case bfd_mach_mips4600:
1643 case bfd_mach_mips4650:
1644 case bfd_mach_mips5000:
1645 monitor_prompt = "<RISQ> ";
1649 if (monitor_prompt == NULL)
1650 monitor_prompt = "<IDT>";
1651 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1655 pmon_open (char *name, int from_tty)
1657 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1661 ddb_open (char *name, int from_tty)
1663 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1667 lsi_open (char *name, int from_tty)
1671 /* Clear the LSI breakpoint table. */
1672 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1673 lsi_breakpoints[i].type = BREAK_UNUSED;
1675 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1678 /* Close a connection to the remote board. */
1681 mips_close (int quitting)
1685 /* Get the board out of remote debugging mode. */
1686 (void) mips_exit_debug ();
1692 /* Detach from the remote board. */
1695 mips_detach (char *args, int from_tty)
1698 error ("Argument given to \"detach\" when remotely debugging.");
1705 printf_unfiltered ("Ending remote MIPS debugging.\n");
1708 /* Tell the target board to resume. This does not wait for a reply
1709 from the board, except in the case of single-stepping on LSI boards,
1710 where PMON does return a reply. */
1713 mips_resume (int pid, int step, enum target_signal siggnal)
1717 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1718 a single step, so we wait for that. */
1719 mips_request (step ? 's' : 'c', 1, siggnal,
1720 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1721 mips_receive_wait, NULL);
1724 /* Return the signal corresponding to SIG, where SIG is the number which
1725 the MIPS protocol uses for the signal. */
1727 mips_signal_from_protocol (int sig)
1729 /* We allow a few more signals than the IDT board actually returns, on
1730 the theory that there is at least *some* hope that perhaps the numbering
1731 for these signals is widely agreed upon. */
1734 return TARGET_SIGNAL_UNKNOWN;
1736 /* Don't want to use target_signal_from_host because we are converting
1737 from MIPS signal numbers, not host ones. Our internal numbers
1738 match the MIPS numbers for the signals the board can return, which
1739 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1740 return (enum target_signal) sig;
1743 /* Wait until the remote stops, and return a wait status. */
1746 mips_wait (int pid, struct target_waitstatus *status)
1750 char buff[DATA_MAXLEN];
1756 interrupt_count = 0;
1759 /* If we have not sent a single step or continue command, then the
1760 board is waiting for us to do something. Return a status
1761 indicating that it is stopped. */
1762 if (!mips_need_reply)
1764 status->kind = TARGET_WAITKIND_STOPPED;
1765 status->value.sig = TARGET_SIGNAL_TRAP;
1769 /* No timeout; we sit here as long as the program continues to execute. */
1771 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1774 mips_error ("Remote failure: %s", safe_strerror (errno));
1776 /* On returning from a continue, the PMON monitor seems to start
1777 echoing back the messages we send prior to sending back the
1778 ACK. The code can cope with this, but to try and avoid the
1779 unnecessary serial traffic, and "spurious" characters displayed
1780 to the user, we cheat and reset the debug protocol. The problems
1781 seems to be caused by a check on the number of arguments, and the
1782 command length, within the monitor causing it to echo the command
1784 if (mips_monitor == MON_PMON)
1787 mips_enter_debug ();
1790 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1792 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1793 &rpc, &rfp, &rsp, flags);
1796 char buf[MAX_REGISTER_RAW_SIZE];
1798 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc);
1799 supply_register (PC_REGNUM, buf);
1801 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp);
1802 supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
1804 store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp);
1805 supply_register (SP_REGNUM, buf);
1807 store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0);
1808 supply_register (FP_REGNUM, buf);
1814 for (i = 0; i <= 2; i++)
1815 if (flags[i] == 'r' || flags[i] == 'w')
1817 else if (flags[i] == '\000')
1822 if (strcmp (target_shortname, "lsi") == 0)
1825 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1826 Right now, PMON doesn't give us enough information to determine which
1827 breakpoint we hit. So we have to look up the PC in our own table
1828 of breakpoints, and if found, assume it's just a normal instruction
1829 fetch breakpoint, not a data watchpoint. FIXME when PMON
1830 provides some way to tell us what type of breakpoint it is. */
1832 CORE_ADDR pc = read_pc ();
1835 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1837 if (lsi_breakpoints[i].addr == pc
1838 && lsi_breakpoints[i].type == BREAK_FETCH)
1845 /* If a data breakpoint was hit, PMON returns the following packet:
1847 The return packet from an ordinary breakpoint doesn't have the
1848 extra 0x01 field tacked onto the end. */
1849 if (nfields == 1 && rpc == 1)
1854 /* NOTE: The following (sig) numbers are defined by PMON:
1855 SPP_SIGTRAP 5 breakpoint
1863 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1864 and so on, because the constants we want here are determined by the
1865 MIPS protocol and have nothing to do with what host we are running on. */
1866 if ((rstatus & 0xff) == 0)
1868 status->kind = TARGET_WAITKIND_EXITED;
1869 status->value.integer = (((rstatus) >> 8) & 0xff);
1871 else if ((rstatus & 0xff) == 0x7f)
1873 status->kind = TARGET_WAITKIND_STOPPED;
1874 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1876 /* If the stop PC is in the _exit function, assume
1877 we hit the 'break 0x3ff' instruction in _exit, so this
1878 is not a normal breakpoint. */
1879 if (strcmp (target_shortname, "lsi") == 0)
1882 CORE_ADDR func_start;
1883 CORE_ADDR pc = read_pc ();
1885 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1886 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1887 && func_start == pc)
1888 status->kind = TARGET_WAITKIND_EXITED;
1893 status->kind = TARGET_WAITKIND_SIGNALLED;
1894 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1900 /* We have to map between the register numbers used by gdb and the
1901 register numbers used by the debugging protocol. This function
1902 assumes that we are using tm-mips.h. */
1904 #define REGNO_OFFSET 96
1907 mips_map_regno (int regno)
1911 if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
1912 return regno - FP0_REGNUM + 32;
1916 return REGNO_OFFSET + 0;
1918 return REGNO_OFFSET + 1;
1920 return REGNO_OFFSET + 2;
1922 return REGNO_OFFSET + 3;
1924 return REGNO_OFFSET + 4;
1926 return REGNO_OFFSET + 5;
1928 /* FIXME: Is there a way to get the status register? */
1933 /* Fetch the remote registers. */
1936 mips_fetch_registers (int regno)
1938 unsigned LONGEST val;
1943 for (regno = 0; regno < NUM_REGS; regno++)
1944 mips_fetch_registers (regno);
1948 if (regno == FP_REGNUM || regno == ZERO_REGNUM)
1949 /* FP_REGNUM on the mips is a hack which is just supposed to read
1950 zero (see also mips-nat.c). */
1954 /* If PMON doesn't support this register, don't waste serial
1955 bandwidth trying to read it. */
1956 int pmon_reg = mips_map_regno (regno);
1957 if (regno != 0 && pmon_reg == 0)
1961 /* Unfortunately the PMON version in the Vr4300 board has been
1962 compiled without the 64bit register access commands. This
1963 means we cannot get hold of the full register width. */
1964 if (mips_monitor == MON_DDB)
1965 val = (unsigned) mips_request ('t', pmon_reg, 0,
1966 &err, mips_receive_wait, NULL);
1968 val = mips_request ('r', pmon_reg, 0,
1969 &err, mips_receive_wait, NULL);
1971 mips_error ("Can't read register %d: %s", regno,
1972 safe_strerror (errno));
1977 char buf[MAX_REGISTER_RAW_SIZE];
1979 /* We got the number the register holds, but gdb expects to see a
1980 value in the target byte ordering. */
1981 store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val);
1982 supply_register (regno, buf);
1986 /* Prepare to store registers. The MIPS protocol can store individual
1987 registers, so this function doesn't have to do anything. */
1990 mips_prepare_to_store (void)
1994 /* Store remote register(s). */
1997 mips_store_registers (int regno)
2003 for (regno = 0; regno < NUM_REGS; regno++)
2004 mips_store_registers (regno);
2008 mips_request ('R', mips_map_regno (regno),
2009 read_register (regno),
2010 &err, mips_receive_wait, NULL);
2012 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2015 /* Fetch a word from the target board. */
2018 mips_fetch_word (CORE_ADDR addr)
2023 val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2026 /* Data space failed; try instruction space. */
2027 val = mips_request ('i', addr, 0, &err,
2028 mips_receive_wait, NULL);
2030 mips_error ("Can't read address 0x%s: %s",
2031 paddr_nz (addr), safe_strerror (errno));
2036 /* Store a word to the target board. Returns errno code or zero for
2037 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2038 memory location there. */
2040 /* FIXME! make sure only 32-bit quantities get stored! */
2042 mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents)
2045 unsigned int oldcontents;
2047 oldcontents = mips_request ('D', addr, val, &err,
2048 mips_receive_wait, NULL);
2051 /* Data space failed; try instruction space. */
2052 oldcontents = mips_request ('I', addr, val, &err,
2053 mips_receive_wait, NULL);
2057 if (old_contents != NULL)
2058 store_unsigned_integer (old_contents, 4, oldcontents);
2062 /* Read or write LEN bytes from inferior memory at MEMADDR,
2063 transferring to or from debugger address MYADDR. Write to inferior
2064 if SHOULD_WRITE is nonzero. Returns length of data written or
2065 read; 0 for error. Note that protocol gives us the correct value
2066 for a longword, since it transfers values in ASCII. We want the
2067 byte values, so we have to swap the longword values. */
2069 static int mask_address_p = 1;
2072 mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
2073 struct mem_attrib *attrib ATTRIBUTE_UNUSED,
2074 struct target_ops *target ATTRIBUTE_UNUSED)
2082 /* PMON targets do not cope well with 64 bit addresses. Mask the
2083 value down to 32 bits. */
2085 memaddr &= (CORE_ADDR) 0xffffffff;
2087 /* Round starting address down to longword boundary. */
2088 addr = memaddr & ~3;
2089 /* Round ending address up; get number of longwords that makes. */
2090 count = (((memaddr + len) - addr) + 3) / 4;
2091 /* Allocate buffer of that many longwords. */
2092 buffer = alloca (count * 4);
2096 /* Fill start and end extra bytes of buffer with existing data. */
2097 if (addr != memaddr || len < 4)
2099 /* Need part of initial word -- fetch it. */
2100 store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr));
2105 /* Need part of last word -- fetch it. FIXME: we do this even
2106 if we don't need it. */
2107 store_unsigned_integer (&buffer[(count - 1) * 4], 4,
2108 mips_fetch_word (addr + (count - 1) * 4));
2111 /* Copy data to be written over corresponding part of buffer */
2113 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2115 /* Write the entire buffer. */
2117 for (i = 0; i < count; i++, addr += 4)
2119 status = mips_store_word (addr,
2120 extract_unsigned_integer (&buffer[i * 4], 4),
2122 /* Report each kilobyte (we download 32-bit words at a time) */
2125 printf_unfiltered ("*");
2126 gdb_flush (gdb_stdout);
2133 /* FIXME: Do we want a QUIT here? */
2136 printf_unfiltered ("\n");
2140 /* Read all the longwords */
2141 for (i = 0; i < count; i++, addr += 4)
2143 store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr));
2147 /* Copy appropriate bytes out of the buffer. */
2148 memcpy (myaddr, buffer + (memaddr & 3), len);
2153 /* Print info on this target. */
2156 mips_files_info (struct target_ops *ignore)
2158 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2161 /* Kill the process running on the board. This will actually only
2162 work if we are doing remote debugging over the console input. I
2163 think that if IDT/sim had the remote debug interrupt enabled on the
2164 right port, we could interrupt the process with a break signal. */
2169 if (!mips_wait_flag)
2174 if (interrupt_count >= 2)
2176 interrupt_count = 0;
2178 target_terminal_ours ();
2180 if (query ("Interrupted while waiting for the program.\n\
2181 Give up (and stop debugging it)? "))
2183 /* Clean up in such a way that mips_close won't try to talk to the
2184 board (it almost surely won't work since we weren't able to talk to
2189 printf_unfiltered ("Ending remote MIPS debugging.\n");
2190 target_mourn_inferior ();
2192 return_to_top_level (RETURN_QUIT);
2195 target_terminal_inferior ();
2198 if (remote_debug > 0)
2199 printf_unfiltered ("Sending break\n");
2201 SERIAL_SEND_BREAK (mips_desc);
2210 SERIAL_WRITE (mips_desc, &cc, 1);
2212 target_mourn_inferior ();
2217 /* Start running on the target board. */
2220 mips_create_inferior (char *execfile, char *args, char **env)
2227 Can't pass arguments to remote MIPS board; arguments ignored.");
2228 /* And don't try to use them on the next "run" command. */
2229 execute_command ("set args", 0);
2232 if (execfile == 0 || exec_bfd == 0)
2233 error ("No executable file specified");
2235 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2237 init_wait_for_inferior ();
2239 /* FIXME: Should we set inferior_pid here? */
2241 proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
2244 /* Clean up after a process. Actually nothing to do. */
2247 mips_mourn_inferior (void)
2249 if (current_ops != NULL)
2250 unpush_target (current_ops);
2251 generic_mourn_inferior ();
2254 /* We can write a breakpoint and read the shadow contents in one
2257 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2258 support, we read the contents of the target location and stash it,
2259 then overwrite it with a breakpoint instruction. ADDR is the target
2260 location in the target machine. CONTENTS_CACHE is a pointer to
2261 memory allocated for saving the target contents. It is guaranteed
2262 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2263 is accomplished via BREAKPOINT_MAX). */
2266 mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2268 if (monitor_supports_breakpoints)
2269 return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2271 return memory_insert_breakpoint (addr, contents_cache);
2275 mips_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2277 if (monitor_supports_breakpoints)
2278 return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2280 return memory_remove_breakpoint (addr, contents_cache);
2283 #if 0 /* currently not used */
2284 /* PMON does not currently provide support for the debug mode 'b'
2285 commands to manipulate breakpoints. However, if we wanted to use
2286 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2287 then this code performs the work needed to leave debug mode,
2288 set/clear the breakpoint, and then return to debug mode. */
2290 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2291 static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
2292 /* NOTE: The code relies on this vector being zero-initialised by the system */
2295 pmon_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2299 if (monitor_supports_breakpoints)
2301 char tbuff[12]; /* space for breakpoint command */
2305 /* PMON does not support debug level breakpoint set/remove: */
2306 if (mips_exit_debug ())
2307 mips_error ("Failed to exit debug mode");
2309 sprintf (tbuff, "b %08x\r", addr);
2310 mips_send_command (tbuff, 0);
2312 mips_expect ("Bpt ");
2314 if (!mips_getstring (tbuff, remote_timeout))
2316 tbuff[2] = '\0'; /* terminate the string */
2317 if (sscanf (tbuff, "%d", &bpnum) != 1)
2319 fprintf_unfiltered (gdb_stderr,
2320 "Invalid decimal breakpoint number from target: %s\n", tbuff);
2324 mips_expect (" = ");
2326 /* Lead in the hex number we are expecting: */
2330 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2331 which targets return 64-bit addresses? PMON returns only 32! */
2332 if (!mips_getstring (&tbuff[2], 8))
2334 tbuff[10] = '\0'; /* terminate the string */
2336 if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
2338 fprintf_unfiltered (gdb_stderr,
2339 "Invalid hex address from target: %s\n", tbuff);
2343 if (bpnum >= PMON_MAX_BP)
2345 fprintf_unfiltered (gdb_stderr,
2346 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2347 bpnum, PMON_MAX_BP - 1);
2352 fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
2354 mips_pmon_bp_info[bpnum] = bpaddr;
2356 mips_expect ("\r\n");
2357 mips_expect (mips_monitor_prompt);
2359 mips_enter_debug ();
2364 return mips_store_word (addr, BREAK_INSN, contents_cache);
2368 pmon_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2370 if (monitor_supports_breakpoints)
2373 char tbuff[7]; /* enough for delete breakpoint command */
2375 for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
2376 if (mips_pmon_bp_info[bpnum] == addr)
2379 if (bpnum >= PMON_MAX_BP)
2381 fprintf_unfiltered (gdb_stderr,
2382 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2387 if (mips_exit_debug ())
2388 mips_error ("Failed to exit debug mode");
2390 sprintf (tbuff, "db %02d\r", bpnum);
2392 mips_send_command (tbuff, -1);
2393 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2394 set" message will be returned. */
2396 mips_enter_debug ();
2401 return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
2406 /* Tell whether this target can support a hardware breakpoint. CNT
2407 is the number of hardware breakpoints already installed. This
2408 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2411 remote_mips_can_use_hardware_watchpoint (int cnt)
2413 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2417 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2418 This is used for memory ref breakpoints. */
2420 static unsigned long
2421 calculate_mask (CORE_ADDR addr, int len)
2426 mask = addr ^ (addr + len - 1);
2428 for (i = 32; i >= 0; i--)
2434 mask = (unsigned long) 0xffffffff >> i;
2440 /* Insert a hardware breakpoint. This works only on LSI targets, which
2441 implement ordinary breakpoints using hardware facilities. */
2444 remote_mips_insert_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2446 if (strcmp (target_shortname, "lsi") == 0)
2447 return mips_insert_breakpoint (addr, contents_cache);
2453 /* Remove a hardware breakpoint. This works only on LSI targets, which
2454 implement ordinary breakpoints using hardware facilities. */
2457 remote_mips_remove_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2459 if (strcmp (target_shortname, "lsi") == 0)
2460 return mips_remove_breakpoint (addr, contents_cache);
2465 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2466 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2470 remote_mips_set_watchpoint (CORE_ADDR addr, int len, int type)
2472 if (set_breakpoint (addr, len, type))
2479 remote_mips_remove_watchpoint (CORE_ADDR addr, int len, int type)
2481 if (clear_breakpoint (addr, len, type))
2488 remote_mips_stopped_by_watchpoint (void)
2490 return hit_watchpoint;
2494 /* Insert a breakpoint. */
2497 set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2499 return common_breakpoint (1, addr, len, type);
2503 /* Clear a breakpoint. */
2506 clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2508 return common_breakpoint (0, addr, len, type);
2512 /* Check the error code from the return packet for an LSI breakpoint
2513 command. If there's no error, just return 0. If it's a warning,
2514 print the warning text and return 0. If it's an error, print
2515 the error text and return 1. <ADDR> is the address of the breakpoint
2516 that was being set. <RERRFLG> is the error code returned by PMON.
2517 This is a helper function for common_breakpoint. */
2520 check_lsi_error (CORE_ADDR addr, int rerrflg)
2522 struct lsi_error *err;
2523 char *saddr = paddr_nz (addr); /* printable address string */
2525 if (rerrflg == 0) /* no error */
2528 /* Warnings can be ORed together, so check them all. */
2529 if (rerrflg & W_WARN)
2531 if (monitor_warnings)
2534 for (err = lsi_warning_table; err->code != 0; err++)
2536 if ((err->code & rerrflg) == err->code)
2539 fprintf_unfiltered (gdb_stderr,
2540 "common_breakpoint (0x%s): Warning: %s\n",
2546 fprintf_unfiltered (gdb_stderr,
2547 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2554 /* Errors are unique, i.e. can't be ORed together. */
2555 for (err = lsi_error_table; err->code != 0; err++)
2557 if ((err->code & rerrflg) == err->code)
2559 fprintf_unfiltered (gdb_stderr,
2560 "common_breakpoint (0x%s): Error: %s\n",
2566 fprintf_unfiltered (gdb_stderr,
2567 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2574 /* This routine sends a breakpoint command to the remote target.
2576 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2577 <ADDR> is the address of the breakpoint.
2578 <LEN> the length of the region to break on.
2579 <TYPE> is the type of breakpoint:
2580 0 = write (BREAK_WRITE)
2581 1 = read (BREAK_READ)
2582 2 = read/write (BREAK_ACCESS)
2583 3 = instruction fetch (BREAK_FETCH)
2585 Return 0 if successful; otherwise 1. */
2588 common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2590 char buf[DATA_MAXLEN + 1];
2592 int rpid, rerrflg, rresponse, rlen;
2595 addr = ADDR_BITS_REMOVE (addr);
2597 if (mips_monitor == MON_LSI)
2599 if (set == 0) /* clear breakpoint */
2601 /* The LSI PMON "clear breakpoint" has this form:
2602 <pid> 'b' <bptn> 0x0
2604 <pid> 'b' 0x0 <code>
2606 <bptn> is a breakpoint number returned by an earlier 'B' command.
2607 Possible return codes: OK, E_BPT. */
2611 /* Search for the breakpoint in the table. */
2612 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2613 if (lsi_breakpoints[i].type == type
2614 && lsi_breakpoints[i].addr == addr
2615 && lsi_breakpoints[i].len == len)
2618 /* Clear the table entry and tell PMON to clear the breakpoint. */
2619 if (i == MAX_LSI_BREAKPOINTS)
2621 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2626 lsi_breakpoints[i].type = BREAK_UNUSED;
2627 sprintf (buf, "0x0 b 0x%x 0x0", i);
2628 mips_send_packet (buf, 1);
2630 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2633 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2635 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2637 return (check_lsi_error (addr, rerrflg));
2640 /* set a breakpoint */
2642 /* The LSI PMON "set breakpoint" command has this form:
2643 <pid> 'B' <addr> 0x0
2645 <pid> 'B' <bptn> <code>
2647 The "set data breakpoint" command has this form:
2649 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2651 where: type= "0x1" = read
2653 "0x3" = access (read or write)
2655 The reply returns two values:
2656 bptn - a breakpoint number, which is a small integer with
2657 possible values of zero through 255.
2658 code - an error return code, a value of zero indicates a
2659 succesful completion, other values indicate various
2660 errors and warnings.
2662 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2666 if (type == BREAK_FETCH) /* instruction breakpoint */
2669 sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr));
2675 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr),
2676 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2677 paddr_nz (addr + len - 1));
2679 mips_send_packet (buf, 1);
2681 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2684 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2685 &rpid, &rcmd, &rresponse, &rerrflg);
2686 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2687 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2690 if (check_lsi_error (addr, rerrflg))
2693 /* rresponse contains PMON's breakpoint number. Record the
2694 information for this breakpoint so we can clear it later. */
2695 lsi_breakpoints[rresponse].type = type;
2696 lsi_breakpoints[rresponse].addr = addr;
2697 lsi_breakpoints[rresponse].len = len;
2704 /* On non-LSI targets, the breakpoint command has this form:
2705 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2706 <MASK> is a don't care mask for addresses.
2707 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2711 mask = calculate_mask (addr, len);
2714 if (set) /* set a breakpoint */
2719 case BREAK_WRITE: /* write */
2722 case BREAK_READ: /* read */
2725 case BREAK_ACCESS: /* read/write */
2728 case BREAK_FETCH: /* fetch */
2736 sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr),
2737 paddr_nz (mask), flags);
2742 sprintf (buf, "0x0 b 0x%s", paddr_nz (addr));
2745 mips_send_packet (buf, 1);
2747 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2750 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2751 &rpid, &rcmd, &rerrflg, &rresponse);
2753 if (nfields != 4 || rcmd != cmd)
2754 mips_error ("common_breakpoint: Bad response from remote board: %s",
2759 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2760 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2761 if (mips_monitor == MON_DDB)
2762 rresponse = rerrflg;
2763 if (rresponse != 22) /* invalid argument */
2764 fprintf_unfiltered (gdb_stderr,
2765 "common_breakpoint (0x%s): Got error: 0x%x\n",
2766 paddr_nz (addr), rresponse);
2774 send_srec (char *srec, int len, CORE_ADDR addr)
2780 SERIAL_WRITE (mips_desc, srec, len);
2782 ch = mips_readchar (remote_timeout);
2786 case SERIAL_TIMEOUT:
2787 error ("Timeout during download.");
2791 case 0x15: /* NACK */
2792 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr));
2795 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2800 /* Download a binary file by converting it to S records. */
2803 mips_load_srec (char *args)
2807 char *buffer, srec[1024];
2809 unsigned int srec_frame = 200;
2811 static int hashmark = 1;
2813 buffer = alloca (srec_frame * 2 + 256);
2815 abfd = bfd_openr (args, 0);
2818 printf_filtered ("Unable to open file %s\n", args);
2822 if (bfd_check_format (abfd, bfd_object) == 0)
2824 printf_filtered ("File is not an object file\n");
2828 /* This actually causes a download in the IDT binary format: */
2829 mips_send_command (LOAD_CMD, 0);
2831 for (s = abfd->sections; s; s = s->next)
2833 if (s->flags & SEC_LOAD)
2835 unsigned int numbytes;
2837 /* FIXME! vma too small????? */
2838 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2840 (long) (s->vma + s->_raw_size));
2841 gdb_flush (gdb_stdout);
2843 for (i = 0; i < s->_raw_size; i += numbytes)
2845 numbytes = min (srec_frame, s->_raw_size - i);
2847 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2849 reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
2850 send_srec (srec, reclen, s->vma + i);
2854 putchar_unfiltered ('#');
2855 gdb_flush (gdb_stdout);
2858 } /* Per-packet (or S-record) loop */
2860 putchar_unfiltered ('\n');
2861 } /* Loadable sections */
2864 putchar_unfiltered ('\n');
2866 /* Write a type 7 terminator record. no data for a type 7, and there
2867 is no data, so len is 0. */
2869 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2871 send_srec (srec, reclen, abfd->start_address);
2873 SERIAL_FLUSH_INPUT (mips_desc);
2877 * mips_make_srec -- make an srecord. This writes each line, one at a
2878 * time, each with it's own header and trailer line.
2879 * An srecord looks like this:
2881 * byte count-+ address
2882 * start ---+ | | data +- checksum
2884 * S01000006F6B692D746573742E73726563E4
2885 * S315000448600000000000000000FC00005900000000E9
2886 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2887 * S30B0004485A0000000000004E
2890 * S<type><length><address><data><checksum>
2894 * is the number of bytes following upto the checksum. Note that
2895 * this is not the number of chars following, since it takes two
2896 * chars to represent a byte.
2900 * 1) two byte address data record
2901 * 2) three byte address data record
2902 * 3) four byte address data record
2903 * 7) four byte address termination record
2904 * 8) three byte address termination record
2905 * 9) two byte address termination record
2908 * is the start address of the data following, or in the case of
2909 * a termination record, the start address of the image
2913 * is the sum of all the raw byte data in the record, from the length
2914 * upwards, modulo 256 and subtracted from 255.
2916 * This routine returns the length of the S-record.
2921 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2924 unsigned char checksum;
2927 /* Create the header for the srec. addr_size is the number of bytes in the address,
2928 and 1 is the number of bytes in the count. */
2930 /* FIXME!! bigger buf required for 64-bit! */
2933 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2934 /* This assumes S3 style downloads (4byte addresses). There should
2935 probably be a check, or the code changed to make it more
2937 buf[3] = memaddr >> 24;
2938 buf[4] = memaddr >> 16;
2939 buf[5] = memaddr >> 8;
2941 memcpy (&buf[7], myaddr, len);
2943 /* Note that the checksum is calculated on the raw data, not the
2944 hexified data. It includes the length, address and the data
2945 portions of the packet. */
2947 buf += 2; /* Point at length byte */
2948 for (i = 0; i < len + 4 + 1; i++)
2956 /* The following manifest controls whether we enable the simple flow
2957 control support provided by the monitor. If enabled the code will
2958 wait for an affirmative ACK between transmitting packets. */
2959 #define DOETXACK (1)
2961 /* The PMON fast-download uses an encoded packet format constructed of
2962 3byte data packets (encoded as 4 printable ASCII characters), and
2963 escape sequences (preceded by a '/'):
2966 'C' compare checksum (12bit value, not included in checksum calculation)
2967 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2968 'Z' zero fill multiple of 3bytes
2969 'B' byte (12bit encoded value, of 8bit data)
2970 'A' address (36bit encoded value)
2971 'E' define entry as original address, and exit load
2973 The packets are processed in 4 character chunks, so the escape
2974 sequences that do not have any data (or variable length data)
2975 should be padded to a 4 character boundary. The decoder will give
2976 an error if the complete message block size is not a multiple of
2977 4bytes (size of record).
2979 The encoding of numbers is done in 6bit fields. The 6bit value is
2980 used to index into this string to get the specific character
2981 encoding for the value: */
2982 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2984 /* Convert the number of bits required into an encoded number, 6bits
2985 at a time (range 0..63). Keep a checksum if required (passed
2986 pointer non-NULL). The function returns the number of encoded
2987 characters written into the buffer. */
2989 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2991 int count = (n / 6);
2995 fprintf_unfiltered (gdb_stderr,
2996 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
3001 fprintf_unfiltered (gdb_stderr,
3002 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
3006 /* Deal with the checksum: */
3012 *chksum += ((v >> 24) & 0xFFF);
3014 *chksum += ((v >> 12) & 0xFFF);
3016 *chksum += ((v >> 0) & 0xFFF);
3023 *p++ = encoding[(v >> n) & 0x3F];
3030 /* Shorthand function (that could be in-lined) to output the zero-fill
3031 escape sequence into the data stream. */
3033 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
3037 sprintf (*buff, "/Z");
3038 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3039 *buff += (count + 2);
3041 return (recsize + count + 2);
3045 pmon_checkset (int recsize, char **buff, int *value)
3049 /* Add the checksum (without updating the value): */
3050 sprintf (*buff, "/C");
3051 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3052 *buff += (count + 2);
3053 sprintf (*buff, "\n");
3054 *buff += 2; /* include zero terminator */
3055 /* Forcing a checksum validation clears the sum: */
3057 return (recsize + count + 3);
3060 /* Amount of padding we leave after at the end of the output buffer,
3061 for the checksum and line termination characters: */
3062 #define CHECKSIZE (4 + 4 + 4 + 2)
3063 /* zero-fill, checksum, transfer end and line termination space. */
3065 /* The amount of binary data loaded from the object file in a single
3067 #define BINCHUNK (1024)
3069 /* Maximum line of data accepted by the monitor: */
3070 #define MAXRECSIZE (550)
3071 /* NOTE: This constant depends on the monitor being used. This value
3072 is for PMON 5.x on the Cogent Vr4300 board. */
3075 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3076 int inamount, int *recsize, unsigned int *csum,
3077 unsigned int *zerofill)
3082 /* This is a simple check to ensure that our data will fit within
3083 the maximum allowable record size. Each record output is 4bytes
3084 in length. We must allow space for a pending zero fill command,
3085 the record, and a checksum record. */
3086 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3088 /* Process the binary data: */
3089 if ((inamount - *inptr) < 3)
3092 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3094 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3096 *recsize += (2 + count);
3101 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3102 /* Simple check for zero data. TODO: A better check would be
3103 to check the last, and then the middle byte for being zero
3104 (if the first byte is not). We could then check for
3105 following runs of zeros, and if above a certain size it is
3106 worth the 4 or 8 character hit of the byte insertions used
3107 to pad to the start of the zeroes. NOTE: This also depends
3108 on the alignment at the end of the zero run. */
3109 if (value == 0x00000000)
3112 if (*zerofill == 0xFFF) /* 12bit counter */
3113 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3118 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3119 count = pmon_makeb64 (value, p, 24, csum);
3132 pmon_check_ack (char *mesg)
3134 #if defined(DOETXACK)
3139 c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc,
3141 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3143 fprintf_unfiltered (gdb_stderr,
3144 "Failed to receive valid ACK for %s\n", mesg);
3145 return (-1); /* terminate the download */
3148 #endif /* DOETXACK */
3152 /* pmon_download - Send a sequence of characters to the PMON download port,
3153 which is either a serial port or a UDP socket. */
3156 pmon_start_download (void)
3160 /* Create the temporary download file. */
3161 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3162 perror_with_name (tftp_localname);
3166 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3167 mips_expect ("Downloading from ");
3168 mips_expect (udp_in_use ? "udp" : "tty0");
3169 mips_expect (", ^C to abort\r\n");
3174 mips_expect_download (char *string)
3176 if (!mips_expect (string))
3178 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3180 remove (tftp_localname); /* Remove temporary file */
3188 pmon_check_entry_address (char *entry_address, int final)
3190 char hexnumber[9]; /* includes '\0' space */
3191 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3192 sprintf (hexnumber, "%x", final);
3193 mips_expect (hexnumber);
3194 mips_expect ("\r\n");
3198 pmon_check_total (int bintotal)
3200 char hexnumber[9]; /* includes '\0' space */
3201 mips_expect ("\r\ntotal = 0x");
3202 sprintf (hexnumber, "%x", bintotal);
3203 mips_expect (hexnumber);
3204 return mips_expect_download (" bytes\r\n");
3208 pmon_end_download (int final, int bintotal)
3210 char hexnumber[9]; /* includes '\0' space */
3214 static char *load_cmd_prefix = "load -b -s ";
3218 /* Close off the temporary file containing the load data. */
3222 /* Make the temporary file readable by the world. */
3223 if (stat (tftp_localname, &stbuf) == 0)
3224 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3226 /* Must reinitialize the board to prevent PMON from crashing. */
3227 mips_send_command ("initEther\r", -1);
3229 /* Send the load command. */
3230 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3231 strcpy (cmd, load_cmd_prefix);
3232 strcat (cmd, tftp_name);
3234 mips_send_command (cmd, 0);
3236 if (!mips_expect_download ("Downloading from "))
3238 if (!mips_expect_download (tftp_name))
3240 if (!mips_expect_download (", ^C to abort\r\n"))
3244 /* Wait for the stuff that PMON prints after the load has completed.
3245 The timeout value for use in the tftp case (15 seconds) was picked
3246 arbitrarily but might be too small for really large downloads. FIXME. */
3247 switch (mips_monitor)
3250 pmon_check_ack ("termination");
3251 pmon_check_entry_address ("Entry address is ", final);
3252 if (!pmon_check_total (bintotal))
3256 pmon_check_entry_address ("Entry Address = ", final);
3257 pmon_check_ack ("termination");
3258 if (!pmon_check_total (bintotal))
3264 remove (tftp_localname); /* Remove temporary file */
3268 pmon_download (char *buffer, int length)
3271 fwrite (buffer, 1, length, tftp_file);
3273 SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length);
3277 pmon_load_fast (char *file)
3281 unsigned char *binbuf;
3284 unsigned int csum = 0;
3285 int hashmark = !tftp_in_use;
3290 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3291 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3293 abfd = bfd_openr (file, 0);
3296 printf_filtered ("Unable to open file %s\n", file);
3300 if (bfd_check_format (abfd, bfd_object) == 0)
3302 printf_filtered ("File is not an object file\n");
3306 /* Setup the required download state: */
3307 mips_send_command ("set dlproto etxack\r", -1);
3308 mips_send_command ("set dlecho off\r", -1);
3309 /* NOTE: We get a "cannot set variable" message if the variable is
3310 already defined to have the argument we give. The code doesn't
3311 care, since it just scans to the next prompt anyway. */
3312 /* Start the download: */
3313 pmon_start_download ();
3315 /* Zero the checksum */
3316 sprintf (buffer, "/Kxx\n");
3317 reclen = strlen (buffer);
3318 pmon_download (buffer, reclen);
3319 finished = pmon_check_ack ("/Kxx");
3321 for (s = abfd->sections; s && !finished; s = s->next)
3322 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3324 bintotal += s->_raw_size;
3325 final = (s->vma + s->_raw_size);
3327 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3328 (unsigned int) (s->vma + s->_raw_size));
3329 gdb_flush (gdb_stdout);
3331 /* Output the starting address */
3332 sprintf (buffer, "/A");
3333 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3334 buffer[2 + reclen] = '\n';
3335 buffer[3 + reclen] = '\0';
3336 reclen += 3; /* for the initial escape code and carriage return */
3337 pmon_download (buffer, reclen);
3338 finished = pmon_check_ack ("/A");
3342 unsigned int binamount;
3343 unsigned int zerofill = 0;
3349 for (i = 0; ((i < s->_raw_size) && !finished); i += binamount)
3353 binamount = min (BINCHUNK, s->_raw_size - i);
3355 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3357 /* This keeps a rolling checksum, until we decide to output
3359 for (; ((binamount - binptr) > 0);)
3361 pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
3362 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3364 reclen = pmon_checkset (reclen, &bp, &csum);
3365 pmon_download (buffer, reclen);
3366 finished = pmon_check_ack ("data record");
3369 zerofill = 0; /* do not transmit pending zerofills */
3375 putchar_unfiltered ('#');
3376 gdb_flush (gdb_stdout);
3380 reclen = 0; /* buffer processed */
3385 /* Ensure no out-standing zerofill requests: */
3387 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3389 /* and then flush the line: */
3392 reclen = pmon_checkset (reclen, &bp, &csum);
3393 /* Currently pmon_checkset outputs the line terminator by
3394 default, so we write out the buffer so far: */
3395 pmon_download (buffer, reclen);
3396 finished = pmon_check_ack ("record remnant");
3400 putchar_unfiltered ('\n');
3403 /* Terminate the transfer. We know that we have an empty output
3404 buffer at this point. */
3405 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3406 reclen = strlen (buffer);
3407 pmon_download (buffer, reclen);
3410 { /* Ignore the termination message: */
3411 SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc);
3414 { /* Deal with termination message: */
3415 pmon_end_download (final, bintotal);
3421 /* mips_load -- download a file. */
3424 mips_load (char *file, int from_tty)
3426 /* Get the board out of remote debugging mode. */
3427 if (mips_exit_debug ())
3428 error ("mips_load: Couldn't get into monitor mode.");
3430 if (mips_monitor != MON_IDT)
3431 pmon_load_fast (file);
3433 mips_load_srec (file);
3437 /* Finally, make the PC point at the start address */
3438 if (mips_monitor != MON_IDT)
3440 /* Work around problem where PMON monitor updates the PC after a load
3441 to a different value than GDB thinks it has. The following ensures
3442 that the write_pc() WILL update the PC value: */
3443 register_valid[PC_REGNUM] = 0;
3446 write_pc (bfd_get_start_address (exec_bfd));
3448 inferior_pid = 0; /* No process now */
3450 /* This is necessary because many things were based on the PC at the time that
3451 we attached to the monitor, which is no longer valid now that we have loaded
3452 new code (and just changed the PC). Another way to do this might be to call
3453 normal_stop, except that the stack may not be valid, and things would get
3454 horribly confused... */
3456 clear_symtab_users ();
3460 /* Pass the command argument as a packet to PMON verbatim. */
3463 pmon_command (char *args, int from_tty)
3465 char buf[DATA_MAXLEN + 1];
3468 sprintf (buf, "0x0 %s", args);
3469 mips_send_packet (buf, 1);
3470 printf_filtered ("Send packet: %s\n", buf);
3472 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3474 printf_filtered ("Received packet: %s\n", buf);
3478 _initialize_remote_mips (void)
3480 /* Initialize the fields in mips_ops that are common to all four targets. */
3481 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3482 mips_ops.to_close = mips_close;
3483 mips_ops.to_detach = mips_detach;
3484 mips_ops.to_resume = mips_resume;
3485 mips_ops.to_fetch_registers = mips_fetch_registers;
3486 mips_ops.to_store_registers = mips_store_registers;
3487 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3488 mips_ops.to_xfer_memory = mips_xfer_memory;
3489 mips_ops.to_files_info = mips_files_info;
3490 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3491 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3492 mips_ops.to_kill = mips_kill;
3493 mips_ops.to_load = mips_load;
3494 mips_ops.to_create_inferior = mips_create_inferior;
3495 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3496 mips_ops.to_stratum = process_stratum;
3497 mips_ops.to_has_all_memory = 1;
3498 mips_ops.to_has_memory = 1;
3499 mips_ops.to_has_stack = 1;
3500 mips_ops.to_has_registers = 1;
3501 mips_ops.to_has_execution = 1;
3502 mips_ops.to_magic = OPS_MAGIC;
3504 /* Copy the common fields to all four target vectors. */
3505 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3507 /* Initialize target-specific fields in the target vectors. */
3508 mips_ops.to_shortname = "mips";
3509 mips_ops.to_doc = "\
3510 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3511 The argument is the device it is connected to or, if it contains a colon,\n\
3512 HOST:PORT to access a board over a network";
3513 mips_ops.to_open = mips_open;
3514 mips_ops.to_wait = mips_wait;
3516 pmon_ops.to_shortname = "pmon";
3517 pmon_ops.to_doc = "\
3518 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3519 line. The argument is the device it is connected to or, if it contains a\n\
3520 colon, HOST:PORT to access a board over a network";
3521 pmon_ops.to_open = pmon_open;
3522 pmon_ops.to_wait = mips_wait;
3524 ddb_ops.to_shortname = "ddb";
3526 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3527 line. The first argument is the device it is connected to or, if it contains\n\
3528 a colon, HOST:PORT to access a board over a network. The optional second\n\
3529 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3530 TFTP downloads to the board. The optional third parameter is the local name\n\
3531 of the TFTP temporary file, if it differs from the filename seen by the board.";
3532 ddb_ops.to_open = ddb_open;
3533 ddb_ops.to_wait = mips_wait;
3535 lsi_ops.to_shortname = "lsi";
3536 lsi_ops.to_doc = pmon_ops.to_doc;
3537 lsi_ops.to_open = lsi_open;
3538 lsi_ops.to_wait = mips_wait;
3540 /* Add the targets. */
3541 add_target (&mips_ops);
3542 add_target (&pmon_ops);
3543 add_target (&ddb_ops);
3544 add_target (&lsi_ops);
3547 add_set_cmd ("timeout", no_class, var_zinteger,
3548 (char *) &mips_receive_wait,
3549 "Set timeout in seconds for remote MIPS serial I/O.",
3554 add_set_cmd ("retransmit-timeout", no_class, var_zinteger,
3555 (char *) &mips_retransmit_wait,
3556 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3557 This is the number of seconds to wait for an acknowledgement to a packet\n\
3558 before resending the packet.", &setlist),
3562 add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
3563 (char *) &mips_syn_garbage,
3564 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3565 This is the maximum number of characters GDB will ignore when trying to\n\
3566 synchronize with the remote system. A value of -1 means that there is no limit\n\
3567 (Note that these characters are printed out even though they are ignored.)",
3572 (add_set_cmd ("monitor-prompt", class_obscure, var_string,
3573 (char *) &mips_monitor_prompt,
3574 "Set the prompt that GDB expects from the monitor.",
3579 add_set_cmd ("monitor-warnings", class_obscure, var_zinteger,
3580 (char *) &monitor_warnings,
3581 "Set printing of monitor warnings.\n"
3582 "When enabled, monitor warnings about hardware breakpoints "
3583 "will be displayed.",
3587 add_com ("pmon <command>", class_obscure, pmon_command,
3588 "Send a packet to PMON (must be in debug mode).");
3590 add_show_from_set (add_set_cmd ("mask-address", no_class,
3591 var_boolean, &mask_address_p,
3592 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3593 Use \"on\" to enable the masking and \"off\" to disable it.\n",