1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 Contributed by Cygnus Support. Written by Ian Lance Taylor
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "exceptions.h"
33 #include "gdb_string.h"
37 #include "mips-tdep.h"
38 #include "gdbthread.h"
41 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
42 types passed by breakpoint.c to target_insert_watchpoint.
43 Value 3 is our own invention, and is used for ordinary instruction
44 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
54 /* Prototypes for local functions. */
56 static int mips_readchar (int timeout);
58 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
61 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
62 int *pch, int timeout);
64 static int mips_cksum (const unsigned char *hdr,
65 const unsigned char *data, int len);
67 static void mips_send_packet (const char *s, int get_ack);
69 static void mips_send_command (const char *cmd, int prompt);
71 static int mips_receive_packet (char *buff, int throw_error, int timeout);
73 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
74 int *perr, int timeout, char *buff);
76 static void mips_initialize (void);
78 static void mips_open (char *name, int from_tty);
80 static void pmon_open (char *name, int from_tty);
82 static void ddb_open (char *name, int from_tty);
84 static void lsi_open (char *name, int from_tty);
86 static void mips_close (int quitting);
88 static void mips_detach (struct target_ops *ops, char *args, int from_tty);
90 static int mips_map_regno (struct gdbarch *, int);
92 static void mips_prepare_to_store (struct regcache *regcache);
94 static unsigned int mips_fetch_word (CORE_ADDR addr);
96 static int mips_store_word (CORE_ADDR addr, unsigned int value,
99 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
101 struct mem_attrib *attrib,
102 struct target_ops *target);
104 static void mips_files_info (struct target_ops *ignore);
106 static void mips_mourn_inferior (struct target_ops *ops);
108 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
110 static int pmon_zeroset (int recsize, char **buff, int *amount,
111 unsigned int *chksum);
113 static int pmon_checkset (int recsize, char **buff, int *value);
115 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
116 int *inptr, int inamount, int *recsize,
117 unsigned int *csum, unsigned int *zerofill);
119 static int pmon_check_ack (char *mesg);
121 static void pmon_start_download (void);
123 static void pmon_end_download (int final, int bintotal);
125 static void pmon_download (char *buffer, int length);
127 static void pmon_load_fast (char *file);
129 static void mips_load (char *file, int from_tty);
131 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
132 unsigned char *myaddr, int len);
134 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
136 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
137 enum break_type type);
139 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
140 enum break_type type);
142 /* Forward declarations. */
143 extern struct target_ops mips_ops;
144 extern struct target_ops pmon_ops;
145 extern struct target_ops ddb_ops;
147 /* The MIPS remote debugging interface is built on top of a simple
148 packet protocol. Each packet is organized as follows:
150 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
151 may not appear anywhere else in the packet. Any time a SYN is
152 seen, a new packet should be assumed to have begun.
155 This byte contains the upper five bits of the logical length
156 of the data section, plus a single bit indicating whether this
157 is a data packet or an acknowledgement. The documentation
158 indicates that this bit is 1 for a data packet, but the actual
159 board uses 1 for an acknowledgement. The value of the byte is
160 0x40 + (ack ? 0x20 : 0) + (len >> 6)
161 (we always have 0 <= len < 1024). Acknowledgement packets do
162 not carry data, and must have a data length of 0.
164 LEN1 This byte contains the lower six bits of the logical length of
165 the data section. The value is
168 SEQ This byte contains the six bit sequence number of the packet.
171 An acknowlegment packet contains the sequence number of the
172 packet being acknowledged plus 1 modulo 64. Data packets are
173 transmitted in sequence. There may only be one outstanding
174 unacknowledged data packet at a time. The sequence numbers
175 are independent in each direction. If an acknowledgement for
176 the previous packet is received (i.e., an acknowledgement with
177 the sequence number of the packet just sent) the packet just
178 sent should be retransmitted. If no acknowledgement is
179 received within a timeout period, the packet should be
180 retransmitted. This has an unfortunate failure condition on a
181 high-latency line, as a delayed acknowledgement may lead to an
182 endless series of duplicate packets.
184 DATA The actual data bytes follow. The following characters are
185 escaped inline with DLE (ASCII 020, or ^P):
191 The additional DLE characters are not counted in the logical
192 length stored in the TYPE_LEN and LEN1 bytes.
197 These bytes contain an 18 bit checksum of the complete
198 contents of the packet excluding the SEQ byte and the
199 CSUM[123] bytes. The checksum is simply the twos complement
200 addition of all the bytes treated as unsigned characters. The
201 values of the checksum bytes are:
202 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
203 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
204 CSUM3: 0x40 + (cksum & 0x3f)
206 It happens that the MIPS remote debugging protocol always
207 communicates with ASCII strings. Because of this, this
208 implementation doesn't bother to handle the DLE quoting mechanism,
209 since it will never be required. */
213 /* The SYN character which starts each packet. */
216 /* The 0x40 used to offset each packet (this value ensures that all of
217 the header and trailer bytes, other than SYN, are printable ASCII
219 #define HDR_OFFSET 0x40
221 /* The indices of the bytes in the packet header. */
222 #define HDR_INDX_SYN 0
223 #define HDR_INDX_TYPE_LEN 1
224 #define HDR_INDX_LEN1 2
225 #define HDR_INDX_SEQ 3
228 /* The data/ack bit in the TYPE_LEN header byte. */
229 #define TYPE_LEN_DA_BIT 0x20
230 #define TYPE_LEN_DATA 0
231 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
233 /* How to compute the header bytes. */
234 #define HDR_SET_SYN(data, len, seq) (SYN)
235 #define HDR_SET_TYPE_LEN(data, len, seq) \
237 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
238 + (((len) >> 6) & 0x1f))
239 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
240 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
242 /* Check that a header byte is reasonable. */
243 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
245 /* Get data from the header. These macros evaluate their argument
247 #define HDR_IS_DATA(hdr) \
248 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
249 #define HDR_GET_LEN(hdr) \
250 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
251 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
253 /* The maximum data length. */
254 #define DATA_MAXLEN 1023
256 /* The trailer offset. */
257 #define TRLR_OFFSET HDR_OFFSET
259 /* The indices of the bytes in the packet trailer. */
260 #define TRLR_INDX_CSUM1 0
261 #define TRLR_INDX_CSUM2 1
262 #define TRLR_INDX_CSUM3 2
263 #define TRLR_LENGTH 3
265 /* How to compute the trailer bytes. */
266 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
267 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
268 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
270 /* Check that a trailer byte is reasonable. */
271 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
273 /* Get data from the trailer. This evaluates its argument multiple
275 #define TRLR_GET_CKSUM(trlr) \
276 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
277 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
278 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
280 /* The sequence number modulos. */
281 #define SEQ_MODULOS (64)
283 /* PMON commands to load from the serial port or UDP socket. */
284 #define LOAD_CMD "load -b -s tty0\r"
285 #define LOAD_CMD_UDP "load -b -s udp\r"
287 /* The target vectors for the four different remote MIPS targets.
288 These are initialized with code in _initialize_remote_mips instead
289 of static initializers, to make it easier to extend the target_ops
291 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
293 enum mips_monitor_type
295 /* IDT/SIM monitor being used: */
297 /* PMON monitor being used: */
298 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
299 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
300 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
301 /* Last and unused value, for sizing vectors, etc. */
304 static enum mips_monitor_type mips_monitor = MON_LAST;
306 /* The monitor prompt text. If the user sets the PMON prompt
307 to some new value, the GDB `set monitor-prompt' command must also
308 be used to inform GDB about the expected prompt. Otherwise, GDB
309 will not be able to connect to PMON in mips_initialize().
310 If the `set monitor-prompt' command is not used, the expected
311 default prompt will be set according the target:
318 static char *mips_monitor_prompt;
320 /* Set to 1 if the target is open. */
321 static int mips_is_open;
323 /* Currently active target description (if mips_is_open == 1) */
324 static struct target_ops *current_ops;
326 /* Set to 1 while the connection is being initialized. */
327 static int mips_initializing;
329 /* Set to 1 while the connection is being brought down. */
330 static int mips_exiting;
332 /* The next sequence number to send. */
333 static unsigned int mips_send_seq;
335 /* The next sequence number we expect to receive. */
336 static unsigned int mips_receive_seq;
338 /* The time to wait before retransmitting a packet, in seconds. */
339 static int mips_retransmit_wait = 3;
341 /* The number of times to try retransmitting a packet before giving up. */
342 static int mips_send_retries = 10;
344 /* The number of garbage characters to accept when looking for an
345 SYN for the next packet. */
346 static int mips_syn_garbage = 10;
348 /* The time to wait for a packet, in seconds. */
349 static int mips_receive_wait = 5;
351 /* Set if we have sent a packet to the board but have not yet received
353 static int mips_need_reply = 0;
355 /* Handle used to access serial I/O stream. */
356 static struct serial *mips_desc;
358 /* UDP handle used to download files to target. */
359 static struct serial *udp_desc;
360 static int udp_in_use;
362 /* TFTP filename used to download files to DDB board, in the form
364 static char *tftp_name; /* host:filename */
365 static char *tftp_localname; /* filename portion of above */
366 static int tftp_in_use;
367 static FILE *tftp_file;
369 /* Counts the number of times the user tried to interrupt the target (usually
371 static int interrupt_count;
373 /* If non-zero, means that the target is running. */
374 static int mips_wait_flag = 0;
376 /* If non-zero, monitor supports breakpoint commands. */
377 static int monitor_supports_breakpoints = 0;
379 /* Data cache header. */
381 #if 0 /* not used (yet?) */
382 static DCACHE *mips_dcache;
385 /* Non-zero means that we've just hit a read or write watchpoint */
386 static int hit_watchpoint;
388 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
389 The table is indexed by a breakpoint number, which is an integer
390 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
392 #define MAX_LSI_BREAKPOINTS 256
393 struct lsi_breakpoint_info
395 enum break_type type; /* type of breakpoint */
396 CORE_ADDR addr; /* address of breakpoint */
397 int len; /* length of region being watched */
398 unsigned long value; /* value to watch */
400 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
402 /* Error/warning codes returned by LSI PMON for breakpoint commands.
403 Warning values may be ORed together; error values may not. */
404 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
405 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
406 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
407 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
409 #define E_ERR 0x200 /* This bit is set if the error code is an error */
410 #define E_BPT 0x200 /* error: No such breakpoint number */
411 #define E_RGE 0x201 /* error: Range is not supported */
412 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
413 #define E_OUT 0x203 /* error: Out of hardware resources */
414 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
418 int code; /* error code */
419 char *string; /* string associated with this code */
422 struct lsi_error lsi_warning_table[] =
424 {W_MSK, "Range feature is supported via mask"},
425 {W_VAL, "Value check is not supported in hardware"},
426 {W_QAL, "Requested qualifiers are not supported in hardware"},
430 struct lsi_error lsi_error_table[] =
432 {E_BPT, "No such breakpoint number"},
433 {E_RGE, "Range is not supported"},
434 {E_QAL, "The requested qualifiers can not be used"},
435 {E_OUT, "Out of hardware resources"},
436 {E_NON, "Hardware breakpoint not supported"},
440 /* Set to 1 with the 'set monitor-warnings' command to enable printing
441 of warnings returned by PMON when hardware breakpoints are used. */
442 static int monitor_warnings;
444 /* This is the ptid we use while we're connected to the remote. Its
445 value is arbitrary, as the remote-mips target doesn't have a notion of
446 processes or threads, but we need something non-null to place in
448 static ptid_t remote_mips_ptid;
454 serial_close (mips_desc);
458 serial_close (udp_desc);
464 /* Handle low-level error that we can't recover from. Note that just
465 error()ing out from target_wait or some such low-level place will cause
466 all hell to break loose--the rest of GDB will tend to get left in an
467 inconsistent state. */
470 mips_error (char *string,...)
474 va_start (args, string);
476 target_terminal_ours ();
477 wrap_here (""); /* Force out any buffered output */
478 gdb_flush (gdb_stdout);
480 fputs_filtered (error_pre_print, gdb_stderr);
481 vfprintf_filtered (gdb_stderr, string, args);
482 fprintf_filtered (gdb_stderr, "\n");
484 gdb_flush (gdb_stderr);
486 /* Clean up in such a way that mips_close won't try to talk to the
487 board (it almost surely won't work since we weren't able to talk to
491 printf_unfiltered ("Ending remote MIPS debugging.\n");
492 if (!ptid_equal (inferior_ptid, null_ptid))
493 target_mourn_inferior ();
495 deprecated_throw_reason (RETURN_ERROR);
498 /* putc_readable - print a character, displaying non-printable chars in
499 ^x notation or in hex. */
502 fputc_readable (int ch, struct ui_file *file)
505 fputc_unfiltered ('\n', file);
507 fprintf_unfiltered (file, "\\r");
508 else if (ch < 0x20) /* ASCII control character */
509 fprintf_unfiltered (file, "^%c", ch + '@');
510 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
511 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
513 fputc_unfiltered (ch, file);
517 /* puts_readable - print a string, displaying non-printable chars in
518 ^x notation or in hex. */
521 fputs_readable (const char *string, struct ui_file *file)
525 while ((c = *string++) != '\0')
526 fputc_readable (c, file);
530 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
531 timed out. TIMEOUT specifies timeout value in seconds.
535 mips_expect_timeout (const char *string, int timeout)
537 const char *p = string;
541 fprintf_unfiltered (gdb_stdlog, "Expected \"");
542 fputs_readable (string, gdb_stdlog);
543 fprintf_unfiltered (gdb_stdlog, "\", got \"");
551 /* Must use serial_readchar() here cuz mips_readchar would get
552 confused if we were waiting for the mips_monitor_prompt... */
554 c = serial_readchar (mips_desc, timeout);
556 if (c == SERIAL_TIMEOUT)
559 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
564 fputc_readable (c, gdb_stdlog);
572 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
585 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
586 timed out. The timeout value is hard-coded to 2 seconds. Use
587 mips_expect_timeout if a different timeout value is needed.
591 mips_expect (const char *string)
593 return mips_expect_timeout (string, remote_timeout);
596 /* Read a character from the remote, aborting on error. Returns
597 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
598 returns). FIXME: If we see the string mips_monitor_prompt from the
599 board, then we are debugging on the main console port, and we have
600 somehow dropped out of remote debugging mode. In this case, we
601 automatically go back in to remote debugging mode. This is a hack,
602 put in because I can't find any way for a program running on the
603 remote board to terminate without also ending remote debugging
604 mode. I assume users won't have any trouble with this; for one
605 thing, the IDT documentation generally assumes that the remote
606 debugging port is not the console port. This is, however, very
607 convenient for DejaGnu when you only have one connected serial
611 mips_readchar (int timeout)
614 static int state = 0;
615 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
621 if (i == -1 && watchdog > 0)
625 if (state == mips_monitor_prompt_len)
627 ch = serial_readchar (mips_desc, timeout);
629 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
631 target_mourn_inferior ();
632 error ("Watchdog has expired. Target detached.\n");
635 if (ch == SERIAL_EOF)
636 mips_error ("End of file from remote");
637 if (ch == SERIAL_ERROR)
638 mips_error ("Error reading from remote: %s", safe_strerror (errno));
639 if (remote_debug > 1)
641 /* Don't use _filtered; we can't deal with a QUIT out of
642 target_wait, and I think this might be called from there. */
643 if (ch != SERIAL_TIMEOUT)
644 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
646 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
649 /* If we have seen mips_monitor_prompt and we either time out, or
650 we see a @ (which was echoed from a packet we sent), reset the
651 board as described above. The first character in a packet after
652 the SYN (which is not echoed) is always an @ unless the packet is
653 more than 64 characters long, which ours never are. */
654 if ((ch == SERIAL_TIMEOUT || ch == '@')
655 && state == mips_monitor_prompt_len
656 && !mips_initializing
659 if (remote_debug > 0)
660 /* Don't use _filtered; we can't deal with a QUIT out of
661 target_wait, and I think this might be called from there. */
662 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
669 /* At this point, about the only thing we can do is abort the command
670 in progress and get back to command level as quickly as possible. */
672 error ("Remote board reset, debug protocol re-initialized.");
675 if (ch == mips_monitor_prompt[state])
683 /* Get a packet header, putting the data in the supplied buffer.
684 PGARBAGE is a pointer to the number of garbage characters received
685 so far. CH is the last character received. Returns 0 for success,
686 or -1 for timeout. */
689 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
695 /* Wait for a SYN. mips_syn_garbage is intended to prevent
696 sitting here indefinitely if the board sends us one garbage
697 character per second. ch may already have a value from the
698 last time through the loop. */
701 ch = mips_readchar (timeout);
702 if (ch == SERIAL_TIMEOUT)
706 /* Printing the character here lets the user of gdb see
707 what the program is outputting, if the debugging is
708 being done on the console port. Don't use _filtered:
709 we can't deal with a QUIT out of target_wait and
710 buffered target output confuses the user. */
711 if (!mips_initializing || remote_debug > 0)
713 if (isprint (ch) || isspace (ch))
715 fputc_unfiltered (ch, gdb_stdtarg);
719 fputc_readable (ch, gdb_stdtarg);
721 gdb_flush (gdb_stdtarg);
724 /* Only count unprintable characters. */
725 if (! (isprint (ch) || isspace (ch)))
728 if (mips_syn_garbage > 0
729 && *pgarbage > mips_syn_garbage)
730 mips_error ("Debug protocol failure: more than %d characters before a sync.",
735 /* Get the packet header following the SYN. */
736 for (i = 1; i < HDR_LENGTH; i++)
738 ch = mips_readchar (timeout);
739 if (ch == SERIAL_TIMEOUT)
741 /* Make sure this is a header byte. */
742 if (ch == SYN || !HDR_CHECK (ch))
748 /* If we got the complete header, we can return. Otherwise we
749 loop around and keep looking for SYN. */
755 /* Get a packet header, putting the data in the supplied buffer.
756 PGARBAGE is a pointer to the number of garbage characters received
757 so far. The last character read is returned in *PCH. Returns 0
758 for success, -1 for timeout, -2 for error. */
761 mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout)
766 for (i = 0; i < TRLR_LENGTH; i++)
768 ch = mips_readchar (timeout);
770 if (ch == SERIAL_TIMEOUT)
772 if (!TRLR_CHECK (ch))
779 /* Get the checksum of a packet. HDR points to the packet header.
780 DATA points to the packet data. LEN is the length of DATA. */
783 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
785 const unsigned char *p;
791 /* The initial SYN is not included in the checksum. */
805 /* Send a packet containing the given ASCII string. */
808 mips_send_packet (const char *s, int get_ack)
810 /* unsigned */ int len;
811 unsigned char *packet;
816 if (len > DATA_MAXLEN)
817 mips_error ("MIPS protocol data packet too long: %s", s);
819 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
821 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
822 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
823 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
824 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
826 memcpy (packet + HDR_LENGTH, s, len);
828 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
829 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
830 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
831 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
833 /* Increment the sequence number. This will set mips_send_seq to
834 the sequence number we expect in the acknowledgement. */
835 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
837 /* We can only have one outstanding data packet, so we just wait for
838 the acknowledgement here. Keep retransmitting the packet until
839 we get one, or until we've tried too many times. */
840 for (try = 0; try < mips_send_retries; try++)
845 if (remote_debug > 0)
847 /* Don't use _filtered; we can't deal with a QUIT out of
848 target_wait, and I think this might be called from there. */
849 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
850 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
853 if (serial_write (mips_desc, packet,
854 HDR_LENGTH + len + TRLR_LENGTH) != 0)
855 mips_error ("write to target failed: %s", safe_strerror (errno));
864 unsigned char hdr[HDR_LENGTH + 1];
865 unsigned char trlr[TRLR_LENGTH + 1];
869 /* Get the packet header. If we time out, resend the data
871 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
877 /* If we get a data packet, assume it is a duplicate and
878 ignore it. FIXME: If the acknowledgement is lost, this
879 data packet may be the packet the remote sends after the
881 if (HDR_IS_DATA (hdr))
885 /* Ignore any errors raised whilst attempting to ignore
888 len = HDR_GET_LEN (hdr);
890 for (i = 0; i < len; i++)
894 rch = mips_readchar (remote_timeout);
900 if (rch == SERIAL_TIMEOUT)
902 /* ignore the character */
906 (void) mips_receive_trailer (trlr, &garbage, &ch,
909 /* We don't bother checking the checksum, or providing an
910 ACK to the packet. */
914 /* If the length is not 0, this is a garbled packet. */
915 if (HDR_GET_LEN (hdr) != 0)
918 /* Get the packet trailer. */
919 err = mips_receive_trailer (trlr, &garbage, &ch,
920 mips_retransmit_wait);
922 /* If we timed out, resend the data packet. */
926 /* If we got a bad character, reread the header. */
930 /* If the checksum does not match the trailer checksum, this
931 is a bad packet; ignore it. */
932 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
933 != TRLR_GET_CKSUM (trlr))
936 if (remote_debug > 0)
938 hdr[HDR_LENGTH] = '\0';
939 trlr[TRLR_LENGTH] = '\0';
940 /* Don't use _filtered; we can't deal with a QUIT out of
941 target_wait, and I think this might be called from there. */
942 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
943 HDR_GET_SEQ (hdr), hdr + 1, trlr);
946 /* If this ack is for the current packet, we're done. */
947 seq = HDR_GET_SEQ (hdr);
948 if (seq == mips_send_seq)
951 /* If this ack is for the last packet, resend the current
953 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
956 /* Otherwise this is a bad ack; ignore it. Increment the
957 garbage count to ensure that we do not stay in this loop
963 mips_error ("Remote did not acknowledge packet");
966 /* Receive and acknowledge a packet, returning the data in BUFF (which
967 should be DATA_MAXLEN + 1 bytes). The protocol documentation
968 implies that only the sender retransmits packets, so this code just
969 waits silently for a packet. It returns the length of the received
970 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
971 don't print an error message and return -1. */
974 mips_receive_packet (char *buff, int throw_error, int timeout)
979 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
986 unsigned char hdr[HDR_LENGTH];
987 unsigned char trlr[TRLR_LENGTH];
991 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
994 mips_error ("Timed out waiting for remote packet");
1001 /* An acknowledgement is probably a duplicate; ignore it. */
1002 if (!HDR_IS_DATA (hdr))
1004 len = HDR_GET_LEN (hdr);
1005 /* Check if the length is valid for an ACK, we may aswell
1006 try and read the remainder of the packet: */
1009 /* Ignore the error condition, since we are going to
1010 ignore the packet anyway. */
1011 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1013 /* Don't use _filtered; we can't deal with a QUIT out of
1014 target_wait, and I think this might be called from there. */
1015 if (remote_debug > 0)
1016 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1020 len = HDR_GET_LEN (hdr);
1021 for (i = 0; i < len; i++)
1025 rch = mips_readchar (timeout);
1031 if (rch == SERIAL_TIMEOUT)
1034 mips_error ("Timed out waiting for remote packet");
1043 /* Don't use _filtered; we can't deal with a QUIT out of
1044 target_wait, and I think this might be called from there. */
1045 if (remote_debug > 0)
1046 fprintf_unfiltered (gdb_stdlog,
1047 "Got new SYN after %d chars (wanted %d)\n",
1052 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1056 mips_error ("Timed out waiting for packet");
1062 /* Don't use _filtered; we can't deal with a QUIT out of
1063 target_wait, and I think this might be called from there. */
1064 if (remote_debug > 0)
1065 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1069 /* If this is the wrong sequence number, ignore it. */
1070 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1072 /* Don't use _filtered; we can't deal with a QUIT out of
1073 target_wait, and I think this might be called from there. */
1074 if (remote_debug > 0)
1075 fprintf_unfiltered (gdb_stdlog,
1076 "Ignoring sequence number %d (want %d)\n",
1077 HDR_GET_SEQ (hdr), mips_receive_seq);
1081 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1084 if (remote_debug > 0)
1085 /* Don't use _filtered; we can't deal with a QUIT out of
1086 target_wait, and I think this might be called from there. */
1087 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1088 mips_cksum (hdr, buff, len),
1089 TRLR_GET_CKSUM (trlr));
1091 /* The checksum failed. Send an acknowledgement for the
1092 previous packet to tell the remote to resend the packet. */
1093 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1094 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1095 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1096 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1098 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1100 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1101 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1102 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1104 if (remote_debug > 0)
1106 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1107 /* Don't use _filtered; we can't deal with a QUIT out of
1108 target_wait, and I think this might be called from there. */
1109 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1113 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1116 mips_error ("write to target failed: %s", safe_strerror (errno));
1122 if (remote_debug > 0)
1125 /* Don't use _filtered; we can't deal with a QUIT out of
1126 target_wait, and I think this might be called from there. */
1127 printf_unfiltered ("Got packet \"%s\"\n", buff);
1130 /* We got the packet. Send an acknowledgement. */
1131 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1133 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1134 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1135 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1136 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1138 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1140 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1141 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1142 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1144 if (remote_debug > 0)
1146 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1147 /* Don't use _filtered; we can't deal with a QUIT out of
1148 target_wait, and I think this might be called from there. */
1149 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1153 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1156 mips_error ("write to target failed: %s", safe_strerror (errno));
1164 /* Optionally send a request to the remote system and optionally wait
1165 for the reply. This implements the remote debugging protocol,
1166 which is built on top of the packet protocol defined above. Each
1167 request has an ADDR argument and a DATA argument. The following
1168 requests are defined:
1170 \0 don't send a request; just wait for a reply
1171 i read word from instruction space at ADDR
1172 d read word from data space at ADDR
1173 I write DATA to instruction space at ADDR
1174 D write DATA to data space at ADDR
1175 r read register number ADDR
1176 R set register number ADDR to value DATA
1177 c continue execution (if ADDR != 1, set pc to ADDR)
1178 s single step (if ADDR != 1, set pc to ADDR)
1180 The read requests return the value requested. The write requests
1181 return the previous value in the changed location. The execution
1182 requests return a UNIX wait value (the approximate signal which
1183 caused execution to stop is in the upper eight bits).
1185 If PERR is not NULL, this function waits for a reply. If an error
1186 occurs, it sets *PERR to 1 and sets errno according to what the
1187 target board reports. */
1190 mips_request (int cmd,
1197 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
1198 char myBuff[DATA_MAXLEN + 1];
1203 unsigned long rresponse;
1205 if (buff == (char *) NULL)
1210 if (mips_need_reply)
1211 internal_error (__FILE__, __LINE__,
1212 _("mips_request: Trying to send command before reply"));
1213 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1214 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1215 mips_send_packet (buff, 1);
1216 mips_need_reply = 1;
1219 if (perr == (int *) NULL)
1222 if (!mips_need_reply)
1223 internal_error (__FILE__, __LINE__,
1224 _("mips_request: Trying to get reply before command"));
1226 mips_need_reply = 0;
1228 len = mips_receive_packet (buff, 1, timeout);
1231 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1232 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1233 || (cmd != '\0' && rcmd != cmd))
1234 mips_error ("Bad response from remote board");
1240 /* FIXME: This will returns MIPS errno numbers, which may or may
1241 not be the same as errno values used on other systems. If
1242 they stick to common errno values, they will be the same, but
1243 if they don't, they must be translated. */
1254 mips_initialize_cleanups (void *arg)
1256 mips_initializing = 0;
1260 mips_exit_cleanups (void *arg)
1266 mips_send_command (const char *cmd, int prompt)
1268 serial_write (mips_desc, cmd, strlen (cmd));
1272 mips_expect (mips_monitor_prompt);
1275 /* Enter remote (dbx) debug mode: */
1277 mips_enter_debug (void)
1279 /* Reset the sequence numbers, ready for the new debug sequence: */
1281 mips_receive_seq = 0;
1283 if (mips_monitor != MON_IDT)
1284 mips_send_command ("debug\r", 0);
1285 else /* assume IDT monitor by default */
1286 mips_send_command ("db tty0\r", 0);
1289 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1291 /* We don't need to absorb any spurious characters here, since the
1292 mips_receive_header will eat up a reasonable number of characters
1293 whilst looking for the SYN, however this avoids the "garbage"
1294 being displayed to the user. */
1295 if (mips_monitor != MON_IDT)
1299 char buff[DATA_MAXLEN + 1];
1300 if (mips_receive_packet (buff, 1, 3) < 0)
1301 mips_error ("Failed to initialize (didn't receive packet).");
1305 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1307 mips_exit_debug (void)
1310 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1314 if (mips_monitor != MON_IDT)
1316 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1317 so we do not get a reply to this command: */
1318 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1319 mips_need_reply = 0;
1320 if (!mips_expect (" break!"))
1324 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1326 if (!mips_expect (mips_monitor_prompt))
1329 do_cleanups (old_cleanups);
1334 /* Initialize a new connection to the MIPS board, and make sure we are
1335 really connected. */
1338 mips_initialize (void)
1341 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1344 /* What is this code doing here? I don't see any way it can happen, and
1345 it might mean mips_initializing didn't get cleared properly.
1346 So I'll make it a warning. */
1348 if (mips_initializing)
1350 warning ("internal error: mips_initialize called twice");
1355 mips_initializing = 1;
1357 /* At this point, the packit protocol isn't responding. We'll try getting
1358 into the monitor, and restarting the protocol. */
1360 /* Force the system into the monitor. After this we *should* be at
1361 the mips_monitor_prompt. */
1362 if (mips_monitor != MON_IDT)
1363 j = 0; /* start by checking if we are already at the prompt */
1365 j = 1; /* start by sending a break */
1370 case 0: /* First, try sending a CR */
1371 serial_flush_input (mips_desc);
1372 serial_write (mips_desc, "\r", 1);
1374 case 1: /* First, try sending a break */
1375 serial_send_break (mips_desc);
1377 case 2: /* Then, try a ^C */
1378 serial_write (mips_desc, "\003", 1);
1380 case 3: /* Then, try escaping from download */
1382 if (mips_monitor != MON_IDT)
1386 /* We shouldn't need to send multiple termination
1387 sequences, since the target performs line (or
1388 block) reads, and then processes those
1389 packets. In-case we were downloading a large packet
1390 we flush the output buffer before inserting a
1391 termination sequence. */
1392 serial_flush_output (mips_desc);
1393 sprintf (tbuff, "\r/E/E\r");
1394 serial_write (mips_desc, tbuff, 6);
1401 /* We are possibly in binary download mode, having
1402 aborted in the middle of an S-record. ^C won't
1403 work because of binary mode. The only reliable way
1404 out is to send enough termination packets (8 bytes)
1405 to fill up and then overflow the largest size
1406 S-record (255 bytes in this case). This amounts to
1410 mips_make_srec (srec, '7', 0, NULL, 0);
1412 for (i = 1; i <= 33; i++)
1414 serial_write (mips_desc, srec, 8);
1416 if (serial_readchar (mips_desc, 0) >= 0)
1417 break; /* Break immediatly if we get something from
1424 mips_error ("Failed to initialize.");
1427 if (mips_expect (mips_monitor_prompt))
1431 if (mips_monitor != MON_IDT)
1433 /* Sometimes PMON ignores the first few characters in the first
1434 command sent after a load. Sending a blank command gets
1436 mips_send_command ("\r", -1);
1438 /* Ensure the correct target state: */
1439 if (mips_monitor != MON_LSI)
1440 mips_send_command ("set regsize 64\r", -1);
1441 mips_send_command ("set hostport tty0\r", -1);
1442 mips_send_command ("set brkcmd \"\"\r", -1);
1443 /* Delete all the current breakpoints: */
1444 mips_send_command ("db *\r", -1);
1445 /* NOTE: PMON does not have breakpoint support through the
1446 "debug" mode, only at the monitor command-line. */
1449 mips_enter_debug ();
1451 /* Clear all breakpoints: */
1452 if ((mips_monitor == MON_IDT
1453 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1454 || mips_monitor == MON_LSI)
1455 monitor_supports_breakpoints = 1;
1457 monitor_supports_breakpoints = 0;
1459 do_cleanups (old_cleanups);
1461 /* If this doesn't call error, we have connected; we don't care if
1462 the request itself succeeds or fails. */
1464 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1467 /* Open a connection to the remote board. */
1469 common_open (struct target_ops *ops, char *name, int from_tty,
1470 enum mips_monitor_type new_monitor,
1471 const char *new_monitor_prompt)
1474 char *serial_port_name;
1475 char *remote_name = 0;
1476 char *local_name = 0;
1481 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1482 device is attached to the target board (e.g., /dev/ttya).\n"
1483 "If you want to use TFTP to download to the board, specify the name of a\n"
1484 "temporary file to be used by GDB for downloads as the second argument.\n"
1485 "This filename must be in the form host:filename, where host is the name\n"
1486 "of the host running the TFTP server, and the file must be readable by the\n"
1487 "world. If the local name of the temporary file differs from the name as\n"
1488 "seen from the board via TFTP, specify that name as the third parameter.\n");
1490 /* Parse the serial port name, the optional TFTP name, and the
1491 optional local TFTP name. */
1492 argv = gdb_buildargv (name);
1493 make_cleanup_freeargv (argv);
1495 serial_port_name = xstrdup (argv[0]);
1496 if (argv[1]) /* remote TFTP name specified? */
1498 remote_name = argv[1];
1499 if (argv[2]) /* local TFTP filename specified? */
1500 local_name = argv[2];
1503 target_preopen (from_tty);
1506 unpush_target (current_ops);
1508 /* Open and initialize the serial port. */
1509 mips_desc = serial_open (serial_port_name);
1510 if (mips_desc == NULL)
1511 perror_with_name (serial_port_name);
1513 if (baud_rate != -1)
1515 if (serial_setbaudrate (mips_desc, baud_rate))
1517 serial_close (mips_desc);
1518 perror_with_name (serial_port_name);
1522 serial_raw (mips_desc);
1524 /* Open and initialize the optional download port. If it is in the form
1525 hostname#portnumber, it's a UDP socket. If it is in the form
1526 hostname:filename, assume it's the TFTP filename that must be
1527 passed to the DDB board to tell it where to get the load file. */
1530 if (strchr (remote_name, '#'))
1532 udp_desc = serial_open (remote_name);
1534 perror_with_name ("Unable to open UDP port");
1539 /* Save the remote and local names of the TFTP temp file. If
1540 the user didn't specify a local name, assume it's the same
1541 as the part of the remote name after the "host:". */
1545 xfree (tftp_localname);
1546 if (local_name == NULL)
1547 if ((local_name = strchr (remote_name, ':')) != NULL)
1548 local_name++; /* skip over the colon */
1549 if (local_name == NULL)
1550 local_name = remote_name; /* local name same as remote name */
1551 tftp_name = xstrdup (remote_name);
1552 tftp_localname = xstrdup (local_name);
1560 /* Reset the expected monitor prompt if it's never been set before. */
1561 if (mips_monitor_prompt == NULL)
1562 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1563 mips_monitor = new_monitor;
1568 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1570 /* Switch to using remote target now. */
1573 inferior_ptid = remote_mips_ptid;
1574 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1575 add_thread_silent (inferior_ptid);
1577 /* Try to figure out the processor model if possible. */
1578 deprecated_mips_set_processor_regs_hack ();
1580 /* This is really the job of start_remote however, that makes an
1581 assumption that the target is about to print out a status message
1582 of some sort. That doesn't happen here (in fact, it may not be
1583 possible to get the monitor to send the appropriate packet). */
1585 reinit_frame_cache ();
1586 registers_changed ();
1587 stop_pc = regcache_read_pc (get_current_regcache ());
1588 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC);
1589 xfree (serial_port_name);
1593 mips_open (char *name, int from_tty)
1595 const char *monitor_prompt = NULL;
1596 if (gdbarch_bfd_arch_info (target_gdbarch) != NULL
1597 && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips)
1599 switch (gdbarch_bfd_arch_info (target_gdbarch)->mach)
1601 case bfd_mach_mips4100:
1602 case bfd_mach_mips4300:
1603 case bfd_mach_mips4600:
1604 case bfd_mach_mips4650:
1605 case bfd_mach_mips5000:
1606 monitor_prompt = "<RISQ> ";
1610 if (monitor_prompt == NULL)
1611 monitor_prompt = "<IDT>";
1612 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1616 pmon_open (char *name, int from_tty)
1618 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1622 ddb_open (char *name, int from_tty)
1624 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1628 lsi_open (char *name, int from_tty)
1632 /* Clear the LSI breakpoint table. */
1633 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1634 lsi_breakpoints[i].type = BREAK_UNUSED;
1636 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1639 /* Close a connection to the remote board. */
1642 mips_close (int quitting)
1646 /* Get the board out of remote debugging mode. */
1647 (void) mips_exit_debug ();
1652 generic_mourn_inferior ();
1655 /* Detach from the remote board. */
1658 mips_detach (struct target_ops *ops, char *args, int from_tty)
1661 error ("Argument given to \"detach\" when remotely debugging.");
1668 printf_unfiltered ("Ending remote MIPS debugging.\n");
1671 /* Tell the target board to resume. This does not wait for a reply
1672 from the board, except in the case of single-stepping on LSI boards,
1673 where PMON does return a reply. */
1676 mips_resume (struct target_ops *ops,
1677 ptid_t ptid, int step, enum target_signal siggnal)
1681 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1682 a single step, so we wait for that. */
1683 mips_request (step ? 's' : 'c', 1, siggnal,
1684 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1685 mips_receive_wait, NULL);
1688 /* Return the signal corresponding to SIG, where SIG is the number which
1689 the MIPS protocol uses for the signal. */
1690 static enum target_signal
1691 mips_signal_from_protocol (int sig)
1693 /* We allow a few more signals than the IDT board actually returns, on
1694 the theory that there is at least *some* hope that perhaps the numbering
1695 for these signals is widely agreed upon. */
1698 return TARGET_SIGNAL_UNKNOWN;
1700 /* Don't want to use target_signal_from_host because we are converting
1701 from MIPS signal numbers, not host ones. Our internal numbers
1702 match the MIPS numbers for the signals the board can return, which
1703 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1704 return (enum target_signal) sig;
1707 /* Wait until the remote stops, and return a wait status. */
1710 mips_wait (struct target_ops *ops,
1711 ptid_t ptid, struct target_waitstatus *status, int options)
1715 char buff[DATA_MAXLEN];
1721 interrupt_count = 0;
1724 /* If we have not sent a single step or continue command, then the
1725 board is waiting for us to do something. Return a status
1726 indicating that it is stopped. */
1727 if (!mips_need_reply)
1729 status->kind = TARGET_WAITKIND_STOPPED;
1730 status->value.sig = TARGET_SIGNAL_TRAP;
1731 return inferior_ptid;
1734 /* No timeout; we sit here as long as the program continues to execute. */
1736 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1739 mips_error ("Remote failure: %s", safe_strerror (errno));
1741 /* On returning from a continue, the PMON monitor seems to start
1742 echoing back the messages we send prior to sending back the
1743 ACK. The code can cope with this, but to try and avoid the
1744 unnecessary serial traffic, and "spurious" characters displayed
1745 to the user, we cheat and reset the debug protocol. The problems
1746 seems to be caused by a check on the number of arguments, and the
1747 command length, within the monitor causing it to echo the command
1749 if (mips_monitor == MON_PMON)
1752 mips_enter_debug ();
1755 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1757 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1758 &rpc, &rfp, &rsp, flags);
1761 struct regcache *regcache = get_current_regcache ();
1762 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1763 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1764 char buf[MAX_REGISTER_SIZE];
1766 store_unsigned_integer
1767 (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)),
1769 regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), buf);
1771 store_unsigned_integer
1772 (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)),
1774 regcache_raw_supply (regcache, 30, buf); /* This register they are avoiding and so it is unnamed */
1776 store_unsigned_integer
1777 (buf, register_size (gdbarch, gdbarch_sp_regnum (gdbarch)),
1779 regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), buf);
1781 store_unsigned_integer
1782 (buf, register_size (gdbarch, gdbarch_deprecated_fp_regnum (gdbarch)),
1784 regcache_raw_supply (regcache,
1785 gdbarch_deprecated_fp_regnum (gdbarch), buf);
1791 for (i = 0; i <= 2; i++)
1792 if (flags[i] == 'r' || flags[i] == 'w')
1794 else if (flags[i] == '\000')
1799 if (strcmp (target_shortname, "lsi") == 0)
1802 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1803 Right now, PMON doesn't give us enough information to determine which
1804 breakpoint we hit. So we have to look up the PC in our own table
1805 of breakpoints, and if found, assume it's just a normal instruction
1806 fetch breakpoint, not a data watchpoint. FIXME when PMON
1807 provides some way to tell us what type of breakpoint it is. */
1809 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1812 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1814 if (lsi_breakpoints[i].addr == pc
1815 && lsi_breakpoints[i].type == BREAK_FETCH)
1822 /* If a data breakpoint was hit, PMON returns the following packet:
1824 The return packet from an ordinary breakpoint doesn't have the
1825 extra 0x01 field tacked onto the end. */
1826 if (nfields == 1 && rpc == 1)
1831 /* NOTE: The following (sig) numbers are defined by PMON:
1832 SPP_SIGTRAP 5 breakpoint
1840 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1841 and so on, because the constants we want here are determined by the
1842 MIPS protocol and have nothing to do with what host we are running on. */
1843 if ((rstatus & 0xff) == 0)
1845 status->kind = TARGET_WAITKIND_EXITED;
1846 status->value.integer = (((rstatus) >> 8) & 0xff);
1848 else if ((rstatus & 0xff) == 0x7f)
1850 status->kind = TARGET_WAITKIND_STOPPED;
1851 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1853 /* If the stop PC is in the _exit function, assume
1854 we hit the 'break 0x3ff' instruction in _exit, so this
1855 is not a normal breakpoint. */
1856 if (strcmp (target_shortname, "lsi") == 0)
1859 CORE_ADDR func_start;
1860 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1862 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1863 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1864 && func_start == pc)
1865 status->kind = TARGET_WAITKIND_EXITED;
1870 status->kind = TARGET_WAITKIND_SIGNALLED;
1871 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1874 return inferior_ptid;
1877 /* We have to map between the register numbers used by gdb and the
1878 register numbers used by the debugging protocol. */
1880 #define REGNO_OFFSET 96
1883 mips_map_regno (struct gdbarch *gdbarch, int regno)
1887 if (regno >= mips_regnum (gdbarch)->fp0
1888 && regno < mips_regnum (gdbarch)->fp0 + 32)
1889 return regno - mips_regnum (gdbarch)->fp0 + 32;
1890 else if (regno == mips_regnum (gdbarch)->pc)
1891 return REGNO_OFFSET + 0;
1892 else if (regno == mips_regnum (gdbarch)->cause)
1893 return REGNO_OFFSET + 1;
1894 else if (regno == mips_regnum (gdbarch)->hi)
1895 return REGNO_OFFSET + 2;
1896 else if (regno == mips_regnum (gdbarch)->lo)
1897 return REGNO_OFFSET + 3;
1898 else if (regno == mips_regnum (gdbarch)->fp_control_status)
1899 return REGNO_OFFSET + 4;
1900 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
1901 return REGNO_OFFSET + 5;
1903 /* FIXME: Is there a way to get the status register? */
1907 /* Fetch the remote registers. */
1910 mips_fetch_registers (struct target_ops *ops,
1911 struct regcache *regcache, int regno)
1913 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1914 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1915 unsigned LONGEST val;
1920 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
1921 mips_fetch_registers (ops, regcache, regno);
1925 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
1926 || regno == MIPS_ZERO_REGNUM)
1927 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
1928 supposed to read zero (see also mips-nat.c). */
1932 /* If PMON doesn't support this register, don't waste serial
1933 bandwidth trying to read it. */
1934 int pmon_reg = mips_map_regno (gdbarch, regno);
1935 if (regno != 0 && pmon_reg == 0)
1939 /* Unfortunately the PMON version in the Vr4300 board has been
1940 compiled without the 64bit register access commands. This
1941 means we cannot get hold of the full register width. */
1942 if (mips_monitor == MON_DDB)
1943 val = (unsigned) mips_request ('t', pmon_reg, 0,
1944 &err, mips_receive_wait, NULL);
1946 val = mips_request ('r', pmon_reg, 0,
1947 &err, mips_receive_wait, NULL);
1949 mips_error ("Can't read register %d: %s", regno,
1950 safe_strerror (errno));
1955 char buf[MAX_REGISTER_SIZE];
1957 /* We got the number the register holds, but gdb expects to see a
1958 value in the target byte ordering. */
1959 store_unsigned_integer (buf, register_size (gdbarch, regno),
1961 regcache_raw_supply (regcache, regno, buf);
1965 /* Prepare to store registers. The MIPS protocol can store individual
1966 registers, so this function doesn't have to do anything. */
1969 mips_prepare_to_store (struct regcache *regcache)
1973 /* Store remote register(s). */
1976 mips_store_registers (struct target_ops *ops,
1977 struct regcache *regcache, int regno)
1979 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1985 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
1986 mips_store_registers (ops, regcache, regno);
1990 regcache_cooked_read_unsigned (regcache, regno, &val);
1991 mips_request ('R', mips_map_regno (gdbarch, regno), val,
1992 &err, mips_receive_wait, NULL);
1994 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
1997 /* Fetch a word from the target board. */
2000 mips_fetch_word (CORE_ADDR addr)
2005 val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2008 /* Data space failed; try instruction space. */
2009 val = mips_request ('i', addr, 0, &err,
2010 mips_receive_wait, NULL);
2012 mips_error ("Can't read address %s: %s",
2013 paddress (target_gdbarch, addr), safe_strerror (errno));
2018 /* Store a word to the target board. Returns errno code or zero for
2019 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2020 memory location there. */
2022 /* FIXME! make sure only 32-bit quantities get stored! */
2024 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2027 unsigned int oldcontents;
2029 oldcontents = mips_request ('D', addr, val, &err,
2030 mips_receive_wait, NULL);
2033 /* Data space failed; try instruction space. */
2034 oldcontents = mips_request ('I', addr, val, &err,
2035 mips_receive_wait, NULL);
2039 if (old_contents != NULL)
2040 *old_contents = oldcontents;
2044 /* Read or write LEN bytes from inferior memory at MEMADDR,
2045 transferring to or from debugger address MYADDR. Write to inferior
2046 if SHOULD_WRITE is nonzero. Returns length of data written or
2047 read; 0 for error. Note that protocol gives us the correct value
2048 for a longword, since it transfers values in ASCII. We want the
2049 byte values, so we have to swap the longword values. */
2051 static int mask_address_p = 1;
2054 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2055 struct mem_attrib *attrib, struct target_ops *target)
2057 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
2064 /* PMON targets do not cope well with 64 bit addresses. Mask the
2065 value down to 32 bits. */
2067 memaddr &= (CORE_ADDR) 0xffffffff;
2069 /* Round starting address down to longword boundary. */
2070 addr = memaddr & ~3;
2071 /* Round ending address up; get number of longwords that makes. */
2072 count = (((memaddr + len) - addr) + 3) / 4;
2073 /* Allocate buffer of that many longwords. */
2074 buffer = alloca (count * 4);
2078 /* Fill start and end extra bytes of buffer with existing data. */
2079 if (addr != memaddr || len < 4)
2081 /* Need part of initial word -- fetch it. */
2082 store_unsigned_integer (&buffer[0], 4, byte_order,
2083 mips_fetch_word (addr));
2088 /* Need part of last word -- fetch it. FIXME: we do this even
2089 if we don't need it. */
2090 store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order,
2091 mips_fetch_word (addr + (count - 1) * 4));
2094 /* Copy data to be written over corresponding part of buffer */
2096 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2098 /* Write the entire buffer. */
2100 for (i = 0; i < count; i++, addr += 4)
2103 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2104 status = mips_store_word (addr, word, NULL);
2105 /* Report each kilobyte (we download 32-bit words at a time) */
2108 printf_unfiltered ("*");
2109 gdb_flush (gdb_stdout);
2116 /* FIXME: Do we want a QUIT here? */
2119 printf_unfiltered ("\n");
2123 /* Read all the longwords */
2124 for (i = 0; i < count; i++, addr += 4)
2126 store_unsigned_integer (&buffer[i * 4], 4, byte_order,
2127 mips_fetch_word (addr));
2131 /* Copy appropriate bytes out of the buffer. */
2132 memcpy (myaddr, buffer + (memaddr & 3), len);
2137 /* Print info on this target. */
2140 mips_files_info (struct target_ops *ignore)
2142 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2145 /* Kill the process running on the board. This will actually only
2146 work if we are doing remote debugging over the console input. I
2147 think that if IDT/sim had the remote debug interrupt enabled on the
2148 right port, we could interrupt the process with a break signal. */
2151 mips_kill (struct target_ops *ops)
2153 if (!mips_wait_flag)
2155 target_mourn_inferior ();
2161 if (interrupt_count >= 2)
2163 interrupt_count = 0;
2165 target_terminal_ours ();
2167 if (query (_("Interrupted while waiting for the program.\n\
2168 Give up (and stop debugging it)? ")))
2170 /* Clean up in such a way that mips_close won't try to talk to the
2171 board (it almost surely won't work since we weren't able to talk to
2176 printf_unfiltered ("Ending remote MIPS debugging.\n");
2177 target_mourn_inferior ();
2179 deprecated_throw_reason (RETURN_QUIT);
2182 target_terminal_inferior ();
2185 if (remote_debug > 0)
2186 printf_unfiltered ("Sending break\n");
2188 serial_send_break (mips_desc);
2190 target_mourn_inferior ();
2199 serial_write (mips_desc, &cc, 1);
2201 target_mourn_inferior ();
2206 /* Start running on the target board. */
2209 mips_create_inferior (struct target_ops *ops, char *execfile,
2210 char *args, char **env, int from_tty)
2217 Can't pass arguments to remote MIPS board; arguments ignored.");
2218 /* And don't try to use them on the next "run" command. */
2219 execute_command ("set args", 0);
2222 if (execfile == 0 || exec_bfd == 0)
2223 error ("No executable file specified");
2225 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2227 init_wait_for_inferior ();
2229 regcache_write_pc (get_current_regcache (), entry_pt);
2232 /* Clean up after a process. The bulk of the work is done in mips_close(),
2233 which is called when unpushing the target. */
2236 mips_mourn_inferior (struct target_ops *ops)
2238 if (current_ops != NULL)
2239 unpush_target (current_ops);
2242 /* We can write a breakpoint and read the shadow contents in one
2245 /* Insert a breakpoint. On targets that don't have built-in
2246 breakpoint support, we read the contents of the target location and
2247 stash it, then overwrite it with a breakpoint instruction. ADDR is
2248 the target location in the target machine. BPT is the breakpoint
2249 being inserted or removed, which contains memory for saving the
2253 mips_insert_breakpoint (struct gdbarch *gdbarch,
2254 struct bp_target_info *bp_tgt)
2256 if (monitor_supports_breakpoints)
2257 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2260 return memory_insert_breakpoint (gdbarch, bp_tgt);
2264 mips_remove_breakpoint (struct gdbarch *gdbarch,
2265 struct bp_target_info *bp_tgt)
2267 if (monitor_supports_breakpoints)
2268 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2271 return memory_remove_breakpoint (gdbarch, bp_tgt);
2274 /* Tell whether this target can support a hardware breakpoint. CNT
2275 is the number of hardware breakpoints already installed. This
2276 implements the target_can_use_hardware_watchpoint macro. */
2279 mips_can_use_watchpoint (int type, int cnt, int othertype)
2281 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2285 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2286 This is used for memory ref breakpoints. */
2288 static unsigned long
2289 calculate_mask (CORE_ADDR addr, int len)
2294 mask = addr ^ (addr + len - 1);
2296 for (i = 32; i >= 0; i--)
2302 mask = (unsigned long) 0xffffffff >> i;
2308 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2309 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2313 mips_insert_watchpoint (CORE_ADDR addr, int len, int type)
2315 if (mips_set_breakpoint (addr, len, type))
2322 mips_remove_watchpoint (CORE_ADDR addr, int len, int type)
2324 if (mips_clear_breakpoint (addr, len, type))
2331 mips_stopped_by_watchpoint (void)
2333 return hit_watchpoint;
2337 /* Insert a breakpoint. */
2340 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2342 return mips_common_breakpoint (1, addr, len, type);
2346 /* Clear a breakpoint. */
2349 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2351 return mips_common_breakpoint (0, addr, len, type);
2355 /* Check the error code from the return packet for an LSI breakpoint
2356 command. If there's no error, just return 0. If it's a warning,
2357 print the warning text and return 0. If it's an error, print
2358 the error text and return 1. <ADDR> is the address of the breakpoint
2359 that was being set. <RERRFLG> is the error code returned by PMON.
2360 This is a helper function for mips_common_breakpoint. */
2363 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2365 struct lsi_error *err;
2366 char *saddr = paddress (target_gdbarch, addr);
2368 if (rerrflg == 0) /* no error */
2371 /* Warnings can be ORed together, so check them all. */
2372 if (rerrflg & W_WARN)
2374 if (monitor_warnings)
2377 for (err = lsi_warning_table; err->code != 0; err++)
2379 if ((err->code & rerrflg) == err->code)
2382 fprintf_unfiltered (gdb_stderr, "\
2383 mips_common_breakpoint (%s): Warning: %s\n",
2389 fprintf_unfiltered (gdb_stderr, "\
2390 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2397 /* Errors are unique, i.e. can't be ORed together. */
2398 for (err = lsi_error_table; err->code != 0; err++)
2400 if ((err->code & rerrflg) == err->code)
2402 fprintf_unfiltered (gdb_stderr, "\
2403 mips_common_breakpoint (%s): Error: %s\n",
2409 fprintf_unfiltered (gdb_stderr, "\
2410 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2417 /* This routine sends a breakpoint command to the remote target.
2419 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2420 <ADDR> is the address of the breakpoint.
2421 <LEN> the length of the region to break on.
2422 <TYPE> is the type of breakpoint:
2423 0 = write (BREAK_WRITE)
2424 1 = read (BREAK_READ)
2425 2 = read/write (BREAK_ACCESS)
2426 3 = instruction fetch (BREAK_FETCH)
2428 Return 0 if successful; otherwise 1. */
2431 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2433 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
2434 char buf[DATA_MAXLEN + 1];
2436 int rpid, rerrflg, rresponse, rlen;
2439 addr = gdbarch_addr_bits_remove (target_gdbarch, addr);
2441 if (mips_monitor == MON_LSI)
2443 if (set == 0) /* clear breakpoint */
2445 /* The LSI PMON "clear breakpoint" has this form:
2446 <pid> 'b' <bptn> 0x0
2448 <pid> 'b' 0x0 <code>
2450 <bptn> is a breakpoint number returned by an earlier 'B' command.
2451 Possible return codes: OK, E_BPT. */
2455 /* Search for the breakpoint in the table. */
2456 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2457 if (lsi_breakpoints[i].type == type
2458 && lsi_breakpoints[i].addr == addr
2459 && lsi_breakpoints[i].len == len)
2462 /* Clear the table entry and tell PMON to clear the breakpoint. */
2463 if (i == MAX_LSI_BREAKPOINTS)
2466 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2467 paddress (target_gdbarch, addr));
2471 lsi_breakpoints[i].type = BREAK_UNUSED;
2472 sprintf (buf, "0x0 b 0x%x 0x0", i);
2473 mips_send_packet (buf, 1);
2475 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2478 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2481 mips_common_breakpoint: Bad response from remote board: %s",
2484 return (mips_check_lsi_error (addr, rerrflg));
2487 /* set a breakpoint */
2489 /* The LSI PMON "set breakpoint" command has this form:
2490 <pid> 'B' <addr> 0x0
2492 <pid> 'B' <bptn> <code>
2494 The "set data breakpoint" command has this form:
2496 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2498 where: type= "0x1" = read
2500 "0x3" = access (read or write)
2502 The reply returns two values:
2503 bptn - a breakpoint number, which is a small integer with
2504 possible values of zero through 255.
2505 code - an error return code, a value of zero indicates a
2506 succesful completion, other values indicate various
2507 errors and warnings.
2509 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2513 if (type == BREAK_FETCH) /* instruction breakpoint */
2516 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2522 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2523 phex_nz (addr, addr_size),
2524 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2525 phex_nz (addr + len - 1, addr_size));
2527 mips_send_packet (buf, 1);
2529 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2532 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2533 &rpid, &rcmd, &rresponse, &rerrflg);
2534 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2536 mips_common_breakpoint: Bad response from remote board: %s",
2540 if (mips_check_lsi_error (addr, rerrflg))
2543 /* rresponse contains PMON's breakpoint number. Record the
2544 information for this breakpoint so we can clear it later. */
2545 lsi_breakpoints[rresponse].type = type;
2546 lsi_breakpoints[rresponse].addr = addr;
2547 lsi_breakpoints[rresponse].len = len;
2554 /* On non-LSI targets, the breakpoint command has this form:
2555 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2556 <MASK> is a don't care mask for addresses.
2557 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2561 mask = calculate_mask (addr, len);
2564 if (set) /* set a breakpoint */
2569 case BREAK_WRITE: /* write */
2572 case BREAK_READ: /* read */
2575 case BREAK_ACCESS: /* read/write */
2578 case BREAK_FETCH: /* fetch */
2582 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
2586 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2587 phex_nz (mask, addr_size), flags);
2592 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2595 mips_send_packet (buf, 1);
2597 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2600 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2601 &rpid, &rcmd, &rerrflg, &rresponse);
2603 if (nfields != 4 || rcmd != cmd)
2605 mips_common_breakpoint: Bad response from remote board: %s",
2610 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2611 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2612 if (mips_monitor == MON_DDB)
2613 rresponse = rerrflg;
2614 if (rresponse != 22) /* invalid argument */
2615 fprintf_unfiltered (gdb_stderr, "\
2616 mips_common_breakpoint (%s): Got error: 0x%x\n",
2617 paddress (target_gdbarch, addr), rresponse);
2625 send_srec (char *srec, int len, CORE_ADDR addr)
2631 serial_write (mips_desc, srec, len);
2633 ch = mips_readchar (remote_timeout);
2637 case SERIAL_TIMEOUT:
2638 error ("Timeout during download.");
2642 case 0x15: /* NACK */
2643 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n",
2644 paddress (target_gdbarch, addr));
2647 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2652 /* Download a binary file by converting it to S records. */
2655 mips_load_srec (char *args)
2659 char *buffer, srec[1024];
2661 unsigned int srec_frame = 200;
2663 static int hashmark = 1;
2665 buffer = alloca (srec_frame * 2 + 256);
2667 abfd = bfd_openr (args, 0);
2670 printf_filtered ("Unable to open file %s\n", args);
2674 if (bfd_check_format (abfd, bfd_object) == 0)
2676 printf_filtered ("File is not an object file\n");
2680 /* This actually causes a download in the IDT binary format: */
2681 mips_send_command (LOAD_CMD, 0);
2683 for (s = abfd->sections; s; s = s->next)
2685 if (s->flags & SEC_LOAD)
2687 unsigned int numbytes;
2689 /* FIXME! vma too small????? */
2690 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2692 (long) (s->vma + bfd_get_section_size (s)));
2693 gdb_flush (gdb_stdout);
2695 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2697 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2699 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2701 reclen = mips_make_srec (srec, '3', s->vma + i,
2703 send_srec (srec, reclen, s->vma + i);
2705 if (deprecated_ui_load_progress_hook)
2706 deprecated_ui_load_progress_hook (s->name, i);
2710 putchar_unfiltered ('#');
2711 gdb_flush (gdb_stdout);
2714 } /* Per-packet (or S-record) loop */
2716 putchar_unfiltered ('\n');
2717 } /* Loadable sections */
2720 putchar_unfiltered ('\n');
2722 /* Write a type 7 terminator record. no data for a type 7, and there
2723 is no data, so len is 0. */
2725 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2727 send_srec (srec, reclen, abfd->start_address);
2729 serial_flush_input (mips_desc);
2733 * mips_make_srec -- make an srecord. This writes each line, one at a
2734 * time, each with it's own header and trailer line.
2735 * An srecord looks like this:
2737 * byte count-+ address
2738 * start ---+ | | data +- checksum
2740 * S01000006F6B692D746573742E73726563E4
2741 * S315000448600000000000000000FC00005900000000E9
2742 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2743 * S30B0004485A0000000000004E
2746 * S<type><length><address><data><checksum>
2750 * is the number of bytes following upto the checksum. Note that
2751 * this is not the number of chars following, since it takes two
2752 * chars to represent a byte.
2756 * 1) two byte address data record
2757 * 2) three byte address data record
2758 * 3) four byte address data record
2759 * 7) four byte address termination record
2760 * 8) three byte address termination record
2761 * 9) two byte address termination record
2764 * is the start address of the data following, or in the case of
2765 * a termination record, the start address of the image
2769 * is the sum of all the raw byte data in the record, from the length
2770 * upwards, modulo 256 and subtracted from 255.
2772 * This routine returns the length of the S-record.
2777 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2780 unsigned char checksum;
2783 /* Create the header for the srec. addr_size is the number of bytes in the address,
2784 and 1 is the number of bytes in the count. */
2786 /* FIXME!! bigger buf required for 64-bit! */
2789 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2790 /* This assumes S3 style downloads (4byte addresses). There should
2791 probably be a check, or the code changed to make it more
2793 buf[3] = memaddr >> 24;
2794 buf[4] = memaddr >> 16;
2795 buf[5] = memaddr >> 8;
2797 memcpy (&buf[7], myaddr, len);
2799 /* Note that the checksum is calculated on the raw data, not the
2800 hexified data. It includes the length, address and the data
2801 portions of the packet. */
2803 buf += 2; /* Point at length byte */
2804 for (i = 0; i < len + 4 + 1; i++)
2812 /* The following manifest controls whether we enable the simple flow
2813 control support provided by the monitor. If enabled the code will
2814 wait for an affirmative ACK between transmitting packets. */
2815 #define DOETXACK (1)
2817 /* The PMON fast-download uses an encoded packet format constructed of
2818 3byte data packets (encoded as 4 printable ASCII characters), and
2819 escape sequences (preceded by a '/'):
2822 'C' compare checksum (12bit value, not included in checksum calculation)
2823 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2824 'Z' zero fill multiple of 3bytes
2825 'B' byte (12bit encoded value, of 8bit data)
2826 'A' address (36bit encoded value)
2827 'E' define entry as original address, and exit load
2829 The packets are processed in 4 character chunks, so the escape
2830 sequences that do not have any data (or variable length data)
2831 should be padded to a 4 character boundary. The decoder will give
2832 an error if the complete message block size is not a multiple of
2833 4bytes (size of record).
2835 The encoding of numbers is done in 6bit fields. The 6bit value is
2836 used to index into this string to get the specific character
2837 encoding for the value: */
2838 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2840 /* Convert the number of bits required into an encoded number, 6bits
2841 at a time (range 0..63). Keep a checksum if required (passed
2842 pointer non-NULL). The function returns the number of encoded
2843 characters written into the buffer. */
2845 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2847 int count = (n / 6);
2851 fprintf_unfiltered (gdb_stderr,
2852 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
2857 fprintf_unfiltered (gdb_stderr,
2858 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
2862 /* Deal with the checksum: */
2868 *chksum += ((v >> 24) & 0xFFF);
2870 *chksum += ((v >> 12) & 0xFFF);
2872 *chksum += ((v >> 0) & 0xFFF);
2879 *p++ = encoding[(v >> n) & 0x3F];
2886 /* Shorthand function (that could be in-lined) to output the zero-fill
2887 escape sequence into the data stream. */
2889 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
2893 sprintf (*buff, "/Z");
2894 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
2895 *buff += (count + 2);
2897 return (recsize + count + 2);
2901 pmon_checkset (int recsize, char **buff, int *value)
2905 /* Add the checksum (without updating the value): */
2906 sprintf (*buff, "/C");
2907 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
2908 *buff += (count + 2);
2909 sprintf (*buff, "\n");
2910 *buff += 2; /* include zero terminator */
2911 /* Forcing a checksum validation clears the sum: */
2913 return (recsize + count + 3);
2916 /* Amount of padding we leave after at the end of the output buffer,
2917 for the checksum and line termination characters: */
2918 #define CHECKSIZE (4 + 4 + 4 + 2)
2919 /* zero-fill, checksum, transfer end and line termination space. */
2921 /* The amount of binary data loaded from the object file in a single
2923 #define BINCHUNK (1024)
2925 /* Maximum line of data accepted by the monitor: */
2926 #define MAXRECSIZE (550)
2927 /* NOTE: This constant depends on the monitor being used. This value
2928 is for PMON 5.x on the Cogent Vr4300 board. */
2931 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
2932 int inamount, int *recsize, unsigned int *csum,
2933 unsigned int *zerofill)
2938 /* This is a simple check to ensure that our data will fit within
2939 the maximum allowable record size. Each record output is 4bytes
2940 in length. We must allow space for a pending zero fill command,
2941 the record, and a checksum record. */
2942 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
2944 /* Process the binary data: */
2945 if ((inamount - *inptr) < 3)
2948 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
2950 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
2952 *recsize += (2 + count);
2957 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
2958 /* Simple check for zero data. TODO: A better check would be
2959 to check the last, and then the middle byte for being zero
2960 (if the first byte is not). We could then check for
2961 following runs of zeros, and if above a certain size it is
2962 worth the 4 or 8 character hit of the byte insertions used
2963 to pad to the start of the zeroes. NOTE: This also depends
2964 on the alignment at the end of the zero run. */
2965 if (value == 0x00000000)
2968 if (*zerofill == 0xFFF) /* 12bit counter */
2969 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
2974 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
2975 count = pmon_makeb64 (value, p, 24, csum);
2988 pmon_check_ack (char *mesg)
2990 #if defined(DOETXACK)
2995 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
2997 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
2999 fprintf_unfiltered (gdb_stderr,
3000 "Failed to receive valid ACK for %s\n", mesg);
3001 return (-1); /* terminate the download */
3004 #endif /* DOETXACK */
3008 /* pmon_download - Send a sequence of characters to the PMON download port,
3009 which is either a serial port or a UDP socket. */
3012 pmon_start_download (void)
3016 /* Create the temporary download file. */
3017 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3018 perror_with_name (tftp_localname);
3022 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3023 mips_expect ("Downloading from ");
3024 mips_expect (udp_in_use ? "udp" : "tty0");
3025 mips_expect (", ^C to abort\r\n");
3030 mips_expect_download (char *string)
3032 if (!mips_expect (string))
3034 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3036 remove (tftp_localname); /* Remove temporary file */
3044 pmon_check_entry_address (char *entry_address, int final)
3046 char hexnumber[9]; /* includes '\0' space */
3047 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3048 sprintf (hexnumber, "%x", final);
3049 mips_expect (hexnumber);
3050 mips_expect ("\r\n");
3054 pmon_check_total (int bintotal)
3056 char hexnumber[9]; /* includes '\0' space */
3057 mips_expect ("\r\ntotal = 0x");
3058 sprintf (hexnumber, "%x", bintotal);
3059 mips_expect (hexnumber);
3060 return mips_expect_download (" bytes\r\n");
3064 pmon_end_download (int final, int bintotal)
3066 char hexnumber[9]; /* includes '\0' space */
3070 static char *load_cmd_prefix = "load -b -s ";
3074 /* Close off the temporary file containing the load data. */
3078 /* Make the temporary file readable by the world. */
3079 if (stat (tftp_localname, &stbuf) == 0)
3080 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3082 /* Must reinitialize the board to prevent PMON from crashing. */
3083 mips_send_command ("initEther\r", -1);
3085 /* Send the load command. */
3086 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3087 strcpy (cmd, load_cmd_prefix);
3088 strcat (cmd, tftp_name);
3090 mips_send_command (cmd, 0);
3092 if (!mips_expect_download ("Downloading from "))
3094 if (!mips_expect_download (tftp_name))
3096 if (!mips_expect_download (", ^C to abort\r\n"))
3100 /* Wait for the stuff that PMON prints after the load has completed.
3101 The timeout value for use in the tftp case (15 seconds) was picked
3102 arbitrarily but might be too small for really large downloads. FIXME. */
3103 switch (mips_monitor)
3106 pmon_check_ack ("termination");
3107 pmon_check_entry_address ("Entry address is ", final);
3108 if (!pmon_check_total (bintotal))
3112 pmon_check_entry_address ("Entry Address = ", final);
3113 pmon_check_ack ("termination");
3114 if (!pmon_check_total (bintotal))
3120 remove (tftp_localname); /* Remove temporary file */
3124 pmon_download (char *buffer, int length)
3127 fwrite (buffer, 1, length, tftp_file);
3129 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3133 pmon_load_fast (char *file)
3137 unsigned char *binbuf;
3140 unsigned int csum = 0;
3141 int hashmark = !tftp_in_use;
3146 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3147 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3149 abfd = bfd_openr (file, 0);
3152 printf_filtered ("Unable to open file %s\n", file);
3156 if (bfd_check_format (abfd, bfd_object) == 0)
3158 printf_filtered ("File is not an object file\n");
3162 /* Setup the required download state: */
3163 mips_send_command ("set dlproto etxack\r", -1);
3164 mips_send_command ("set dlecho off\r", -1);
3165 /* NOTE: We get a "cannot set variable" message if the variable is
3166 already defined to have the argument we give. The code doesn't
3167 care, since it just scans to the next prompt anyway. */
3168 /* Start the download: */
3169 pmon_start_download ();
3171 /* Zero the checksum */
3172 sprintf (buffer, "/Kxx\n");
3173 reclen = strlen (buffer);
3174 pmon_download (buffer, reclen);
3175 finished = pmon_check_ack ("/Kxx");
3177 for (s = abfd->sections; s && !finished; s = s->next)
3178 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3180 bintotal += bfd_get_section_size (s);
3181 final = (s->vma + bfd_get_section_size (s));
3183 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3184 (unsigned int) (s->vma + bfd_get_section_size (s)));
3185 gdb_flush (gdb_stdout);
3187 /* Output the starting address */
3188 sprintf (buffer, "/A");
3189 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3190 buffer[2 + reclen] = '\n';
3191 buffer[3 + reclen] = '\0';
3192 reclen += 3; /* for the initial escape code and carriage return */
3193 pmon_download (buffer, reclen);
3194 finished = pmon_check_ack ("/A");
3198 unsigned int binamount;
3199 unsigned int zerofill = 0;
3206 i < bfd_get_section_size (s) && !finished;
3211 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3213 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3215 /* This keeps a rolling checksum, until we decide to output
3217 for (; ((binamount - binptr) > 0);)
3219 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3220 &reclen, &csum, &zerofill);
3221 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3223 reclen = pmon_checkset (reclen, &bp, &csum);
3224 pmon_download (buffer, reclen);
3225 finished = pmon_check_ack ("data record");
3228 zerofill = 0; /* do not transmit pending zerofills */
3232 if (deprecated_ui_load_progress_hook)
3233 deprecated_ui_load_progress_hook (s->name, i);
3237 putchar_unfiltered ('#');
3238 gdb_flush (gdb_stdout);
3242 reclen = 0; /* buffer processed */
3247 /* Ensure no out-standing zerofill requests: */
3249 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3251 /* and then flush the line: */
3254 reclen = pmon_checkset (reclen, &bp, &csum);
3255 /* Currently pmon_checkset outputs the line terminator by
3256 default, so we write out the buffer so far: */
3257 pmon_download (buffer, reclen);
3258 finished = pmon_check_ack ("record remnant");
3262 putchar_unfiltered ('\n');
3265 /* Terminate the transfer. We know that we have an empty output
3266 buffer at this point. */
3267 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3268 reclen = strlen (buffer);
3269 pmon_download (buffer, reclen);
3272 { /* Ignore the termination message: */
3273 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3276 { /* Deal with termination message: */
3277 pmon_end_download (final, bintotal);
3283 /* mips_load -- download a file. */
3286 mips_load (char *file, int from_tty)
3288 struct regcache *regcache;
3290 /* Get the board out of remote debugging mode. */
3291 if (mips_exit_debug ())
3292 error ("mips_load: Couldn't get into monitor mode.");
3294 if (mips_monitor != MON_IDT)
3295 pmon_load_fast (file);
3297 mips_load_srec (file);
3301 /* Finally, make the PC point at the start address */
3302 regcache = get_current_regcache ();
3303 if (mips_monitor != MON_IDT)
3305 /* Work around problem where PMON monitor updates the PC after a load
3306 to a different value than GDB thinks it has. The following ensures
3307 that the regcache_write_pc() WILL update the PC value: */
3308 regcache_invalidate (regcache,
3309 mips_regnum (get_regcache_arch (regcache))->pc);
3312 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3315 /* Check to see if a thread is still alive. */
3318 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3320 if (ptid_equal (ptid, remote_mips_ptid))
3321 /* The monitor's task is always alive. */
3327 /* Convert a thread ID to a string. Returns the string in a static
3331 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3333 static char buf[64];
3335 if (ptid_equal (ptid, remote_mips_ptid))
3337 xsnprintf (buf, sizeof buf, "Thread <main>");
3341 return normal_pid_to_str (ptid);
3344 /* Pass the command argument as a packet to PMON verbatim. */
3347 pmon_command (char *args, int from_tty)
3349 char buf[DATA_MAXLEN + 1];
3352 sprintf (buf, "0x0 %s", args);
3353 mips_send_packet (buf, 1);
3354 printf_filtered ("Send packet: %s\n", buf);
3356 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3358 printf_filtered ("Received packet: %s\n", buf);
3361 extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */
3364 _initialize_remote_mips (void)
3366 /* Initialize the fields in mips_ops that are common to all four targets. */
3367 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3368 mips_ops.to_close = mips_close;
3369 mips_ops.to_detach = mips_detach;
3370 mips_ops.to_resume = mips_resume;
3371 mips_ops.to_fetch_registers = mips_fetch_registers;
3372 mips_ops.to_store_registers = mips_store_registers;
3373 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3374 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3375 mips_ops.to_files_info = mips_files_info;
3376 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3377 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3378 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3379 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3380 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3381 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3382 mips_ops.to_kill = mips_kill;
3383 mips_ops.to_load = mips_load;
3384 mips_ops.to_create_inferior = mips_create_inferior;
3385 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3386 mips_ops.to_thread_alive = mips_thread_alive;
3387 mips_ops.to_pid_to_str = mips_pid_to_str;
3388 mips_ops.to_log_command = serial_log_command;
3389 mips_ops.to_stratum = process_stratum;
3390 mips_ops.to_has_all_memory = default_child_has_all_memory;
3391 mips_ops.to_has_memory = default_child_has_memory;
3392 mips_ops.to_has_stack = default_child_has_stack;
3393 mips_ops.to_has_registers = default_child_has_registers;
3394 mips_ops.to_has_execution = default_child_has_execution;
3395 mips_ops.to_magic = OPS_MAGIC;
3397 /* Copy the common fields to all four target vectors. */
3398 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3400 /* Initialize target-specific fields in the target vectors. */
3401 mips_ops.to_shortname = "mips";
3402 mips_ops.to_doc = "\
3403 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3404 The argument is the device it is connected to or, if it contains a colon,\n\
3405 HOST:PORT to access a board over a network";
3406 mips_ops.to_open = mips_open;
3407 mips_ops.to_wait = mips_wait;
3409 pmon_ops.to_shortname = "pmon";
3410 pmon_ops.to_doc = "\
3411 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3412 line. The argument is the device it is connected to or, if it contains a\n\
3413 colon, HOST:PORT to access a board over a network";
3414 pmon_ops.to_open = pmon_open;
3415 pmon_ops.to_wait = mips_wait;
3417 ddb_ops.to_shortname = "ddb";
3419 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3420 line. The first argument is the device it is connected to or, if it contains\n\
3421 a colon, HOST:PORT to access a board over a network. The optional second\n\
3422 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3423 TFTP downloads to the board. The optional third parameter is the local name\n\
3424 of the TFTP temporary file, if it differs from the filename seen by the board.";
3425 ddb_ops.to_open = ddb_open;
3426 ddb_ops.to_wait = mips_wait;
3428 lsi_ops.to_shortname = "lsi";
3429 lsi_ops.to_doc = pmon_ops.to_doc;
3430 lsi_ops.to_open = lsi_open;
3431 lsi_ops.to_wait = mips_wait;
3433 /* Add the targets. */
3434 add_target (&mips_ops);
3435 add_target (&pmon_ops);
3436 add_target (&ddb_ops);
3437 add_target (&lsi_ops);
3439 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3440 Set timeout in seconds for remote MIPS serial I/O."), _("\
3441 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3443 NULL, /* FIXME: i18n: */
3444 &setlist, &showlist);
3446 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3447 &mips_retransmit_wait, _("\
3448 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3449 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3450 This is the number of seconds to wait for an acknowledgement to a packet\n\
3451 before resending the packet."),
3453 NULL, /* FIXME: i18n: */
3454 &setlist, &showlist);
3456 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3457 &mips_syn_garbage, _("\
3458 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3459 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3460 This is the maximum number of characters GDB will ignore when trying to\n\
3461 synchronize with the remote system. A value of -1 means that there is no\n\
3462 limit. (Note that these characters are printed out even though they are\n\
3465 NULL, /* FIXME: i18n: */
3466 &setlist, &showlist);
3468 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3469 &mips_monitor_prompt, _("\
3470 Set the prompt that GDB expects from the monitor."), _("\
3471 Show the prompt that GDB expects from the monitor."), NULL,
3473 NULL, /* FIXME: i18n: */
3474 &setlist, &showlist);
3476 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3477 &monitor_warnings, _("\
3478 Set printing of monitor warnings."), _("\
3479 Show printing of monitor warnings."), _("\
3480 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3482 NULL, /* FIXME: i18n: */
3483 &setlist, &showlist);
3485 add_com ("pmon", class_obscure, pmon_command,
3486 _("Send a packet to PMON (must be in debug mode)."));
3488 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3489 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3490 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3491 Use \"on\" to enable the masking and \"off\" to disable it."),
3493 NULL, /* FIXME: i18n: */
3494 &setlist, &showlist);
3495 remote_mips_ptid = ptid_build (42000, 0, 42000);