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_set_register (int regno, ULONGEST value);
94 static void mips_prepare_to_store (struct regcache *regcache);
96 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
98 static int mips_store_word (CORE_ADDR addr, unsigned int value,
101 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
103 struct mem_attrib *attrib,
104 struct target_ops *target);
106 static void mips_files_info (struct target_ops *ignore);
108 static void mips_mourn_inferior (struct target_ops *ops);
110 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
112 static int pmon_zeroset (int recsize, char **buff, int *amount,
113 unsigned int *chksum);
115 static int pmon_checkset (int recsize, char **buff, int *value);
117 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
118 int *inptr, int inamount, int *recsize,
119 unsigned int *csum, unsigned int *zerofill);
121 static int pmon_check_ack (char *mesg);
123 static void pmon_start_download (void);
125 static void pmon_end_download (int final, int bintotal);
127 static void pmon_download (char *buffer, int length);
129 static void pmon_load_fast (char *file);
131 static void mips_load (char *file, int from_tty);
133 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
134 unsigned char *myaddr, int len);
136 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
138 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
139 enum break_type type);
141 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
142 enum break_type type);
144 /* Forward declarations. */
145 extern struct target_ops mips_ops;
146 extern struct target_ops pmon_ops;
147 extern struct target_ops ddb_ops;
148 extern struct target_ops rockhopper_ops;
150 /* The MIPS remote debugging interface is built on top of a simple
151 packet protocol. Each packet is organized as follows:
153 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
154 may not appear anywhere else in the packet. Any time a SYN is
155 seen, a new packet should be assumed to have begun.
158 This byte contains the upper five bits of the logical length
159 of the data section, plus a single bit indicating whether this
160 is a data packet or an acknowledgement. The documentation
161 indicates that this bit is 1 for a data packet, but the actual
162 board uses 1 for an acknowledgement. The value of the byte is
163 0x40 + (ack ? 0x20 : 0) + (len >> 6)
164 (we always have 0 <= len < 1024). Acknowledgement packets do
165 not carry data, and must have a data length of 0.
167 LEN1 This byte contains the lower six bits of the logical length of
168 the data section. The value is
171 SEQ This byte contains the six bit sequence number of the packet.
174 An acknowlegment packet contains the sequence number of the
175 packet being acknowledged plus 1 modulo 64. Data packets are
176 transmitted in sequence. There may only be one outstanding
177 unacknowledged data packet at a time. The sequence numbers
178 are independent in each direction. If an acknowledgement for
179 the previous packet is received (i.e., an acknowledgement with
180 the sequence number of the packet just sent) the packet just
181 sent should be retransmitted. If no acknowledgement is
182 received within a timeout period, the packet should be
183 retransmitted. This has an unfortunate failure condition on a
184 high-latency line, as a delayed acknowledgement may lead to an
185 endless series of duplicate packets.
187 DATA The actual data bytes follow. The following characters are
188 escaped inline with DLE (ASCII 020, or ^P):
194 The additional DLE characters are not counted in the logical
195 length stored in the TYPE_LEN and LEN1 bytes.
200 These bytes contain an 18 bit checksum of the complete
201 contents of the packet excluding the SEQ byte and the
202 CSUM[123] bytes. The checksum is simply the twos complement
203 addition of all the bytes treated as unsigned characters. The
204 values of the checksum bytes are:
205 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
206 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
207 CSUM3: 0x40 + (cksum & 0x3f)
209 It happens that the MIPS remote debugging protocol always
210 communicates with ASCII strings. Because of this, this
211 implementation doesn't bother to handle the DLE quoting mechanism,
212 since it will never be required. */
216 /* The SYN character which starts each packet. */
219 /* The 0x40 used to offset each packet (this value ensures that all of
220 the header and trailer bytes, other than SYN, are printable ASCII
222 #define HDR_OFFSET 0x40
224 /* The indices of the bytes in the packet header. */
225 #define HDR_INDX_SYN 0
226 #define HDR_INDX_TYPE_LEN 1
227 #define HDR_INDX_LEN1 2
228 #define HDR_INDX_SEQ 3
231 /* The data/ack bit in the TYPE_LEN header byte. */
232 #define TYPE_LEN_DA_BIT 0x20
233 #define TYPE_LEN_DATA 0
234 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
236 /* How to compute the header bytes. */
237 #define HDR_SET_SYN(data, len, seq) (SYN)
238 #define HDR_SET_TYPE_LEN(data, len, seq) \
240 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
241 + (((len) >> 6) & 0x1f))
242 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
243 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
245 /* Check that a header byte is reasonable. */
246 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
248 /* Get data from the header. These macros evaluate their argument
250 #define HDR_IS_DATA(hdr) \
251 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
252 #define HDR_GET_LEN(hdr) \
253 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
254 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
256 /* The maximum data length. */
257 #define DATA_MAXLEN 1023
259 /* The trailer offset. */
260 #define TRLR_OFFSET HDR_OFFSET
262 /* The indices of the bytes in the packet trailer. */
263 #define TRLR_INDX_CSUM1 0
264 #define TRLR_INDX_CSUM2 1
265 #define TRLR_INDX_CSUM3 2
266 #define TRLR_LENGTH 3
268 /* How to compute the trailer bytes. */
269 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
270 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
271 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
273 /* Check that a trailer byte is reasonable. */
274 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
276 /* Get data from the trailer. This evaluates its argument multiple
278 #define TRLR_GET_CKSUM(trlr) \
279 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
280 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
281 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
283 /* The sequence number modulos. */
284 #define SEQ_MODULOS (64)
286 /* PMON commands to load from the serial port or UDP socket. */
287 #define LOAD_CMD "load -b -s tty0\r"
288 #define LOAD_CMD_UDP "load -b -s udp\r"
290 /* The target vectors for the four different remote MIPS targets.
291 These are initialized with code in _initialize_remote_mips instead
292 of static initializers, to make it easier to extend the target_ops
294 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
296 enum mips_monitor_type
298 /* IDT/SIM monitor being used: */
300 /* PMON monitor being used: */
301 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
302 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
303 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
305 /* Last and unused value, for sizing vectors, etc. */
308 static enum mips_monitor_type mips_monitor = MON_LAST;
310 /* The monitor prompt text. If the user sets the PMON prompt
311 to some new value, the GDB `set monitor-prompt' command must also
312 be used to inform GDB about the expected prompt. Otherwise, GDB
313 will not be able to connect to PMON in mips_initialize().
314 If the `set monitor-prompt' command is not used, the expected
315 default prompt will be set according the target:
322 static char *mips_monitor_prompt;
324 /* Set to 1 if the target is open. */
325 static int mips_is_open;
327 /* Currently active target description (if mips_is_open == 1) */
328 static struct target_ops *current_ops;
330 /* Set to 1 while the connection is being initialized. */
331 static int mips_initializing;
333 /* Set to 1 while the connection is being brought down. */
334 static int mips_exiting;
336 /* The next sequence number to send. */
337 static unsigned int mips_send_seq;
339 /* The next sequence number we expect to receive. */
340 static unsigned int mips_receive_seq;
342 /* The time to wait before retransmitting a packet, in seconds. */
343 static int mips_retransmit_wait = 3;
345 /* The number of times to try retransmitting a packet before giving up. */
346 static int mips_send_retries = 10;
348 /* The number of garbage characters to accept when looking for an
349 SYN for the next packet. */
350 static int mips_syn_garbage = 10;
352 /* The time to wait for a packet, in seconds. */
353 static int mips_receive_wait = 5;
355 /* Set if we have sent a packet to the board but have not yet received
357 static int mips_need_reply = 0;
359 /* Handle used to access serial I/O stream. */
360 static struct serial *mips_desc;
362 /* UDP handle used to download files to target. */
363 static struct serial *udp_desc;
364 static int udp_in_use;
366 /* TFTP filename used to download files to DDB board, in the form
368 static char *tftp_name; /* host:filename */
369 static char *tftp_localname; /* filename portion of above */
370 static int tftp_in_use;
371 static FILE *tftp_file;
373 /* Counts the number of times the user tried to interrupt the target (usually
375 static int interrupt_count;
377 /* If non-zero, means that the target is running. */
378 static int mips_wait_flag = 0;
380 /* If non-zero, monitor supports breakpoint commands. */
381 static int monitor_supports_breakpoints = 0;
383 /* Data cache header. */
385 #if 0 /* not used (yet?) */
386 static DCACHE *mips_dcache;
389 /* Non-zero means that we've just hit a read or write watchpoint */
390 static int hit_watchpoint;
392 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
393 The table is indexed by a breakpoint number, which is an integer
394 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
396 #define MAX_LSI_BREAKPOINTS 256
397 struct lsi_breakpoint_info
399 enum break_type type; /* type of breakpoint */
400 CORE_ADDR addr; /* address of breakpoint */
401 int len; /* length of region being watched */
402 unsigned long value; /* value to watch */
404 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
406 /* Error/warning codes returned by LSI PMON for breakpoint commands.
407 Warning values may be ORed together; error values may not. */
408 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
409 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
410 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
411 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
413 #define E_ERR 0x200 /* This bit is set if the error code is an error */
414 #define E_BPT 0x200 /* error: No such breakpoint number */
415 #define E_RGE 0x201 /* error: Range is not supported */
416 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
417 #define E_OUT 0x203 /* error: Out of hardware resources */
418 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
422 int code; /* error code */
423 char *string; /* string associated with this code */
426 struct lsi_error lsi_warning_table[] =
428 {W_MSK, "Range feature is supported via mask"},
429 {W_VAL, "Value check is not supported in hardware"},
430 {W_QAL, "Requested qualifiers are not supported in hardware"},
434 struct lsi_error lsi_error_table[] =
436 {E_BPT, "No such breakpoint number"},
437 {E_RGE, "Range is not supported"},
438 {E_QAL, "The requested qualifiers can not be used"},
439 {E_OUT, "Out of hardware resources"},
440 {E_NON, "Hardware breakpoint not supported"},
444 /* Set to 1 with the 'set monitor-warnings' command to enable printing
445 of warnings returned by PMON when hardware breakpoints are used. */
446 static int monitor_warnings;
448 /* This is the ptid we use while we're connected to the remote. Its
449 value is arbitrary, as the remote-mips target doesn't have a notion of
450 processes or threads, but we need something non-null to place in
452 static ptid_t remote_mips_ptid;
458 serial_close (mips_desc);
462 serial_close (udp_desc);
468 /* Handle low-level error that we can't recover from. Note that just
469 error()ing out from target_wait or some such low-level place will cause
470 all hell to break loose--the rest of GDB will tend to get left in an
471 inconsistent state. */
474 mips_error (char *string,...)
478 va_start (args, string);
480 target_terminal_ours ();
481 wrap_here (""); /* Force out any buffered output */
482 gdb_flush (gdb_stdout);
484 fputs_filtered (error_pre_print, gdb_stderr);
485 vfprintf_filtered (gdb_stderr, string, args);
486 fprintf_filtered (gdb_stderr, "\n");
488 gdb_flush (gdb_stderr);
490 /* Clean up in such a way that mips_close won't try to talk to the
491 board (it almost surely won't work since we weren't able to talk to
495 printf_unfiltered ("Ending remote MIPS debugging.\n");
496 if (!ptid_equal (inferior_ptid, null_ptid))
497 target_mourn_inferior ();
499 deprecated_throw_reason (RETURN_ERROR);
502 /* putc_readable - print a character, displaying non-printable chars in
503 ^x notation or in hex. */
506 fputc_readable (int ch, struct ui_file *file)
509 fputc_unfiltered ('\n', file);
511 fprintf_unfiltered (file, "\\r");
512 else if (ch < 0x20) /* ASCII control character */
513 fprintf_unfiltered (file, "^%c", ch + '@');
514 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
515 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
517 fputc_unfiltered (ch, file);
521 /* puts_readable - print a string, displaying non-printable chars in
522 ^x notation or in hex. */
525 fputs_readable (const char *string, struct ui_file *file)
529 while ((c = *string++) != '\0')
530 fputc_readable (c, file);
534 /* Read P as a hex value. Return true if every character made sense,
535 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
538 read_hex_value (const char *p, ULONGEST *result)
546 if (*p >= '0' && *p <= '9')
548 else if (*p >= 'A' && *p <= 'F')
549 retval |= *p - 'A' + 10;
550 else if (*p >= 'a' && *p <= 'f')
551 retval |= *p - 'a' + 10;
561 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
562 timed out. TIMEOUT specifies timeout value in seconds.
566 mips_expect_timeout (const char *string, int timeout)
568 const char *p = string;
572 fprintf_unfiltered (gdb_stdlog, "Expected \"");
573 fputs_readable (string, gdb_stdlog);
574 fprintf_unfiltered (gdb_stdlog, "\", got \"");
582 /* Must use serial_readchar() here cuz mips_readchar would get
583 confused if we were waiting for the mips_monitor_prompt... */
585 c = serial_readchar (mips_desc, timeout);
587 if (c == SERIAL_TIMEOUT)
590 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
595 fputc_readable (c, gdb_stdlog);
603 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
616 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
617 timed out. The timeout value is hard-coded to 2 seconds. Use
618 mips_expect_timeout if a different timeout value is needed.
622 mips_expect (const char *string)
624 return mips_expect_timeout (string, remote_timeout);
627 /* Read a character from the remote, aborting on error. Returns
628 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
629 returns). FIXME: If we see the string mips_monitor_prompt from the
630 board, then we are debugging on the main console port, and we have
631 somehow dropped out of remote debugging mode. In this case, we
632 automatically go back in to remote debugging mode. This is a hack,
633 put in because I can't find any way for a program running on the
634 remote board to terminate without also ending remote debugging
635 mode. I assume users won't have any trouble with this; for one
636 thing, the IDT documentation generally assumes that the remote
637 debugging port is not the console port. This is, however, very
638 convenient for DejaGnu when you only have one connected serial
642 mips_readchar (int timeout)
645 static int state = 0;
646 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
652 if (i == -1 && watchdog > 0)
656 if (state == mips_monitor_prompt_len)
658 ch = serial_readchar (mips_desc, timeout);
660 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
662 target_mourn_inferior ();
663 error ("Watchdog has expired. Target detached.\n");
666 if (ch == SERIAL_EOF)
667 mips_error ("End of file from remote");
668 if (ch == SERIAL_ERROR)
669 mips_error ("Error reading from remote: %s", safe_strerror (errno));
670 if (remote_debug > 1)
672 /* Don't use _filtered; we can't deal with a QUIT out of
673 target_wait, and I think this might be called from there. */
674 if (ch != SERIAL_TIMEOUT)
675 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
677 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
680 /* If we have seen mips_monitor_prompt and we either time out, or
681 we see a @ (which was echoed from a packet we sent), reset the
682 board as described above. The first character in a packet after
683 the SYN (which is not echoed) is always an @ unless the packet is
684 more than 64 characters long, which ours never are. */
685 if ((ch == SERIAL_TIMEOUT || ch == '@')
686 && state == mips_monitor_prompt_len
687 && !mips_initializing
690 if (remote_debug > 0)
691 /* Don't use _filtered; we can't deal with a QUIT out of
692 target_wait, and I think this might be called from there. */
693 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
700 /* At this point, about the only thing we can do is abort the command
701 in progress and get back to command level as quickly as possible. */
703 error ("Remote board reset, debug protocol re-initialized.");
706 if (ch == mips_monitor_prompt[state])
714 /* Get a packet header, putting the data in the supplied buffer.
715 PGARBAGE is a pointer to the number of garbage characters received
716 so far. CH is the last character received. Returns 0 for success,
717 or -1 for timeout. */
720 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
726 /* Wait for a SYN. mips_syn_garbage is intended to prevent
727 sitting here indefinitely if the board sends us one garbage
728 character per second. ch may already have a value from the
729 last time through the loop. */
732 ch = mips_readchar (timeout);
733 if (ch == SERIAL_TIMEOUT)
737 /* Printing the character here lets the user of gdb see
738 what the program is outputting, if the debugging is
739 being done on the console port. Don't use _filtered:
740 we can't deal with a QUIT out of target_wait and
741 buffered target output confuses the user. */
742 if (!mips_initializing || remote_debug > 0)
744 if (isprint (ch) || isspace (ch))
746 fputc_unfiltered (ch, gdb_stdtarg);
750 fputc_readable (ch, gdb_stdtarg);
752 gdb_flush (gdb_stdtarg);
755 /* Only count unprintable characters. */
756 if (! (isprint (ch) || isspace (ch)))
759 if (mips_syn_garbage > 0
760 && *pgarbage > mips_syn_garbage)
761 mips_error ("Debug protocol failure: more than %d characters before a sync.",
766 /* Get the packet header following the SYN. */
767 for (i = 1; i < HDR_LENGTH; i++)
769 ch = mips_readchar (timeout);
770 if (ch == SERIAL_TIMEOUT)
772 /* Make sure this is a header byte. */
773 if (ch == SYN || !HDR_CHECK (ch))
779 /* If we got the complete header, we can return. Otherwise we
780 loop around and keep looking for SYN. */
786 /* Get a packet header, putting the data in the supplied buffer.
787 PGARBAGE is a pointer to the number of garbage characters received
788 so far. The last character read is returned in *PCH. Returns 0
789 for success, -1 for timeout, -2 for error. */
792 mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout)
797 for (i = 0; i < TRLR_LENGTH; i++)
799 ch = mips_readchar (timeout);
801 if (ch == SERIAL_TIMEOUT)
803 if (!TRLR_CHECK (ch))
810 /* Get the checksum of a packet. HDR points to the packet header.
811 DATA points to the packet data. LEN is the length of DATA. */
814 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
816 const unsigned char *p;
822 /* The initial SYN is not included in the checksum. */
836 /* Send a packet containing the given ASCII string. */
839 mips_send_packet (const char *s, int get_ack)
841 /* unsigned */ int len;
842 unsigned char *packet;
847 if (len > DATA_MAXLEN)
848 mips_error ("MIPS protocol data packet too long: %s", s);
850 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
852 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
853 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
854 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
855 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
857 memcpy (packet + HDR_LENGTH, s, len);
859 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
860 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
861 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
862 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
864 /* Increment the sequence number. This will set mips_send_seq to
865 the sequence number we expect in the acknowledgement. */
866 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
868 /* We can only have one outstanding data packet, so we just wait for
869 the acknowledgement here. Keep retransmitting the packet until
870 we get one, or until we've tried too many times. */
871 for (try = 0; try < mips_send_retries; try++)
876 if (remote_debug > 0)
878 /* Don't use _filtered; we can't deal with a QUIT out of
879 target_wait, and I think this might be called from there. */
880 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
881 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
884 if (serial_write (mips_desc, packet,
885 HDR_LENGTH + len + TRLR_LENGTH) != 0)
886 mips_error ("write to target failed: %s", safe_strerror (errno));
895 unsigned char hdr[HDR_LENGTH + 1];
896 unsigned char trlr[TRLR_LENGTH + 1];
900 /* Get the packet header. If we time out, resend the data
902 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
908 /* If we get a data packet, assume it is a duplicate and
909 ignore it. FIXME: If the acknowledgement is lost, this
910 data packet may be the packet the remote sends after the
912 if (HDR_IS_DATA (hdr))
916 /* Ignore any errors raised whilst attempting to ignore
919 len = HDR_GET_LEN (hdr);
921 for (i = 0; i < len; i++)
925 rch = mips_readchar (remote_timeout);
931 if (rch == SERIAL_TIMEOUT)
933 /* ignore the character */
937 (void) mips_receive_trailer (trlr, &garbage, &ch,
940 /* We don't bother checking the checksum, or providing an
941 ACK to the packet. */
945 /* If the length is not 0, this is a garbled packet. */
946 if (HDR_GET_LEN (hdr) != 0)
949 /* Get the packet trailer. */
950 err = mips_receive_trailer (trlr, &garbage, &ch,
951 mips_retransmit_wait);
953 /* If we timed out, resend the data packet. */
957 /* If we got a bad character, reread the header. */
961 /* If the checksum does not match the trailer checksum, this
962 is a bad packet; ignore it. */
963 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
964 != TRLR_GET_CKSUM (trlr))
967 if (remote_debug > 0)
969 hdr[HDR_LENGTH] = '\0';
970 trlr[TRLR_LENGTH] = '\0';
971 /* Don't use _filtered; we can't deal with a QUIT out of
972 target_wait, and I think this might be called from there. */
973 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
974 HDR_GET_SEQ (hdr), hdr + 1, trlr);
977 /* If this ack is for the current packet, we're done. */
978 seq = HDR_GET_SEQ (hdr);
979 if (seq == mips_send_seq)
982 /* If this ack is for the last packet, resend the current
984 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
987 /* Otherwise this is a bad ack; ignore it. Increment the
988 garbage count to ensure that we do not stay in this loop
994 mips_error ("Remote did not acknowledge packet");
997 /* Receive and acknowledge a packet, returning the data in BUFF (which
998 should be DATA_MAXLEN + 1 bytes). The protocol documentation
999 implies that only the sender retransmits packets, so this code just
1000 waits silently for a packet. It returns the length of the received
1001 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1002 don't print an error message and return -1. */
1005 mips_receive_packet (char *buff, int throw_error, int timeout)
1010 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1017 unsigned char hdr[HDR_LENGTH];
1018 unsigned char trlr[TRLR_LENGTH];
1022 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1025 mips_error ("Timed out waiting for remote packet");
1032 /* An acknowledgement is probably a duplicate; ignore it. */
1033 if (!HDR_IS_DATA (hdr))
1035 len = HDR_GET_LEN (hdr);
1036 /* Check if the length is valid for an ACK, we may aswell
1037 try and read the remainder of the packet: */
1040 /* Ignore the error condition, since we are going to
1041 ignore the packet anyway. */
1042 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1044 /* Don't use _filtered; we can't deal with a QUIT out of
1045 target_wait, and I think this might be called from there. */
1046 if (remote_debug > 0)
1047 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1051 len = HDR_GET_LEN (hdr);
1052 for (i = 0; i < len; i++)
1056 rch = mips_readchar (timeout);
1062 if (rch == SERIAL_TIMEOUT)
1065 mips_error ("Timed out waiting for remote packet");
1074 /* Don't use _filtered; we can't deal with a QUIT out of
1075 target_wait, and I think this might be called from there. */
1076 if (remote_debug > 0)
1077 fprintf_unfiltered (gdb_stdlog,
1078 "Got new SYN after %d chars (wanted %d)\n",
1083 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1087 mips_error ("Timed out waiting for packet");
1093 /* Don't use _filtered; we can't deal with a QUIT out of
1094 target_wait, and I think this might be called from there. */
1095 if (remote_debug > 0)
1096 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1100 /* If this is the wrong sequence number, ignore it. */
1101 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1103 /* Don't use _filtered; we can't deal with a QUIT out of
1104 target_wait, and I think this might be called from there. */
1105 if (remote_debug > 0)
1106 fprintf_unfiltered (gdb_stdlog,
1107 "Ignoring sequence number %d (want %d)\n",
1108 HDR_GET_SEQ (hdr), mips_receive_seq);
1112 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1115 if (remote_debug > 0)
1116 /* Don't use _filtered; we can't deal with a QUIT out of
1117 target_wait, and I think this might be called from there. */
1118 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1119 mips_cksum (hdr, buff, len),
1120 TRLR_GET_CKSUM (trlr));
1122 /* The checksum failed. Send an acknowledgement for the
1123 previous packet to tell the remote to resend the packet. */
1124 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1125 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1126 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1127 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1129 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1131 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1132 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1133 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1135 if (remote_debug > 0)
1137 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1138 /* Don't use _filtered; we can't deal with a QUIT out of
1139 target_wait, and I think this might be called from there. */
1140 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1144 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1147 mips_error ("write to target failed: %s", safe_strerror (errno));
1153 if (remote_debug > 0)
1156 /* Don't use _filtered; we can't deal with a QUIT out of
1157 target_wait, and I think this might be called from there. */
1158 printf_unfiltered ("Got packet \"%s\"\n", buff);
1161 /* We got the packet. Send an acknowledgement. */
1162 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1164 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1165 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1166 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1167 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1169 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1171 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1172 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1173 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1175 if (remote_debug > 0)
1177 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1178 /* Don't use _filtered; we can't deal with a QUIT out of
1179 target_wait, and I think this might be called from there. */
1180 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1184 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1187 mips_error ("write to target failed: %s", safe_strerror (errno));
1195 /* Optionally send a request to the remote system and optionally wait
1196 for the reply. This implements the remote debugging protocol,
1197 which is built on top of the packet protocol defined above. Each
1198 request has an ADDR argument and a DATA argument. The following
1199 requests are defined:
1201 \0 don't send a request; just wait for a reply
1202 i read word from instruction space at ADDR
1203 d read word from data space at ADDR
1204 I write DATA to instruction space at ADDR
1205 D write DATA to data space at ADDR
1206 r read register number ADDR
1207 R set register number ADDR to value DATA
1208 c continue execution (if ADDR != 1, set pc to ADDR)
1209 s single step (if ADDR != 1, set pc to ADDR)
1211 The read requests return the value requested. The write requests
1212 return the previous value in the changed location. The execution
1213 requests return a UNIX wait value (the approximate signal which
1214 caused execution to stop is in the upper eight bits).
1216 If PERR is not NULL, this function waits for a reply. If an error
1217 occurs, it sets *PERR to 1 and sets errno according to what the
1218 target board reports. */
1221 mips_request (int cmd,
1228 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
1229 char myBuff[DATA_MAXLEN + 1];
1230 char response_string[17];
1237 if (buff == (char *) NULL)
1242 if (mips_need_reply)
1243 internal_error (__FILE__, __LINE__,
1244 _("mips_request: Trying to send command before reply"));
1245 /* 'T' sets a register to a 64-bit value, so make sure we use
1246 the right conversion function. */
1248 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1249 phex_nz (addr, addr_size), phex_nz (data, 8));
1251 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1252 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1254 mips_send_packet (buff, 1);
1255 mips_need_reply = 1;
1258 if (perr == (int *) NULL)
1261 if (!mips_need_reply)
1262 internal_error (__FILE__, __LINE__,
1263 _("mips_request: Trying to get reply before command"));
1265 mips_need_reply = 0;
1267 len = mips_receive_packet (buff, 1, timeout);
1270 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1271 &rpid, &rcmd, &rerrflg, response_string) != 4
1272 || !read_hex_value (response_string, &rresponse)
1273 || (cmd != '\0' && rcmd != cmd))
1274 mips_error ("Bad response from remote board");
1280 /* FIXME: This will returns MIPS errno numbers, which may or may
1281 not be the same as errno values used on other systems. If
1282 they stick to common errno values, they will be the same, but
1283 if they don't, they must be translated. */
1294 mips_initialize_cleanups (void *arg)
1296 mips_initializing = 0;
1300 mips_exit_cleanups (void *arg)
1306 mips_send_command (const char *cmd, int prompt)
1308 serial_write (mips_desc, cmd, strlen (cmd));
1312 mips_expect (mips_monitor_prompt);
1315 /* Enter remote (dbx) debug mode: */
1317 mips_enter_debug (void)
1319 /* Reset the sequence numbers, ready for the new debug sequence: */
1321 mips_receive_seq = 0;
1323 if (mips_monitor != MON_IDT)
1324 mips_send_command ("debug\r", 0);
1325 else /* assume IDT monitor by default */
1326 mips_send_command ("db tty0\r", 0);
1329 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1331 /* We don't need to absorb any spurious characters here, since the
1332 mips_receive_header will eat up a reasonable number of characters
1333 whilst looking for the SYN, however this avoids the "garbage"
1334 being displayed to the user. */
1335 if (mips_monitor != MON_IDT)
1339 char buff[DATA_MAXLEN + 1];
1340 if (mips_receive_packet (buff, 1, 3) < 0)
1341 mips_error ("Failed to initialize (didn't receive packet).");
1345 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1347 mips_exit_debug (void)
1350 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1354 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1356 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1357 so we do not get a reply to this command: */
1358 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1359 mips_need_reply = 0;
1360 if (!mips_expect (" break!"))
1364 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1366 if (!mips_expect (mips_monitor_prompt))
1369 do_cleanups (old_cleanups);
1374 /* Initialize a new connection to the MIPS board, and make sure we are
1375 really connected. */
1378 mips_initialize (void)
1381 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1384 /* What is this code doing here? I don't see any way it can happen, and
1385 it might mean mips_initializing didn't get cleared properly.
1386 So I'll make it a warning. */
1388 if (mips_initializing)
1390 warning ("internal error: mips_initialize called twice");
1395 mips_initializing = 1;
1397 /* At this point, the packit protocol isn't responding. We'll try getting
1398 into the monitor, and restarting the protocol. */
1400 /* Force the system into the monitor. After this we *should* be at
1401 the mips_monitor_prompt. */
1402 if (mips_monitor != MON_IDT)
1403 j = 0; /* start by checking if we are already at the prompt */
1405 j = 1; /* start by sending a break */
1410 case 0: /* First, try sending a CR */
1411 serial_flush_input (mips_desc);
1412 serial_write (mips_desc, "\r", 1);
1414 case 1: /* First, try sending a break */
1415 serial_send_break (mips_desc);
1417 case 2: /* Then, try a ^C */
1418 serial_write (mips_desc, "\003", 1);
1420 case 3: /* Then, try escaping from download */
1422 if (mips_monitor != MON_IDT)
1426 /* We shouldn't need to send multiple termination
1427 sequences, since the target performs line (or
1428 block) reads, and then processes those
1429 packets. In-case we were downloading a large packet
1430 we flush the output buffer before inserting a
1431 termination sequence. */
1432 serial_flush_output (mips_desc);
1433 sprintf (tbuff, "\r/E/E\r");
1434 serial_write (mips_desc, tbuff, 6);
1441 /* We are possibly in binary download mode, having
1442 aborted in the middle of an S-record. ^C won't
1443 work because of binary mode. The only reliable way
1444 out is to send enough termination packets (8 bytes)
1445 to fill up and then overflow the largest size
1446 S-record (255 bytes in this case). This amounts to
1450 mips_make_srec (srec, '7', 0, NULL, 0);
1452 for (i = 1; i <= 33; i++)
1454 serial_write (mips_desc, srec, 8);
1456 if (serial_readchar (mips_desc, 0) >= 0)
1457 break; /* Break immediatly if we get something from
1464 mips_error ("Failed to initialize.");
1467 if (mips_expect (mips_monitor_prompt))
1471 if (mips_monitor != MON_IDT)
1473 /* Sometimes PMON ignores the first few characters in the first
1474 command sent after a load. Sending a blank command gets
1476 mips_send_command ("\r", -1);
1478 /* Ensure the correct target state: */
1479 if (mips_monitor != MON_LSI)
1480 mips_send_command ("set regsize 64\r", -1);
1481 mips_send_command ("set hostport tty0\r", -1);
1482 mips_send_command ("set brkcmd \"\"\r", -1);
1483 /* Delete all the current breakpoints: */
1484 mips_send_command ("db *\r", -1);
1485 /* NOTE: PMON does not have breakpoint support through the
1486 "debug" mode, only at the monitor command-line. */
1489 mips_enter_debug ();
1491 /* Clear all breakpoints: */
1492 if ((mips_monitor == MON_IDT
1493 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1494 || mips_monitor == MON_LSI)
1495 monitor_supports_breakpoints = 1;
1497 monitor_supports_breakpoints = 0;
1499 do_cleanups (old_cleanups);
1501 /* If this doesn't call error, we have connected; we don't care if
1502 the request itself succeeds or fails. */
1504 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1507 /* Open a connection to the remote board. */
1509 common_open (struct target_ops *ops, char *name, int from_tty,
1510 enum mips_monitor_type new_monitor,
1511 const char *new_monitor_prompt)
1514 char *serial_port_name;
1515 char *remote_name = 0;
1516 char *local_name = 0;
1521 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1522 device is attached to the target board (e.g., /dev/ttya).\n"
1523 "If you want to use TFTP to download to the board, specify the name of a\n"
1524 "temporary file to be used by GDB for downloads as the second argument.\n"
1525 "This filename must be in the form host:filename, where host is the name\n"
1526 "of the host running the TFTP server, and the file must be readable by the\n"
1527 "world. If the local name of the temporary file differs from the name as\n"
1528 "seen from the board via TFTP, specify that name as the third parameter.\n");
1530 /* Parse the serial port name, the optional TFTP name, and the
1531 optional local TFTP name. */
1532 argv = gdb_buildargv (name);
1533 make_cleanup_freeargv (argv);
1535 serial_port_name = xstrdup (argv[0]);
1536 if (argv[1]) /* remote TFTP name specified? */
1538 remote_name = argv[1];
1539 if (argv[2]) /* local TFTP filename specified? */
1540 local_name = argv[2];
1543 target_preopen (from_tty);
1546 unpush_target (current_ops);
1548 /* Open and initialize the serial port. */
1549 mips_desc = serial_open (serial_port_name);
1550 if (mips_desc == NULL)
1551 perror_with_name (serial_port_name);
1553 if (baud_rate != -1)
1555 if (serial_setbaudrate (mips_desc, baud_rate))
1557 serial_close (mips_desc);
1558 perror_with_name (serial_port_name);
1562 serial_raw (mips_desc);
1564 /* Open and initialize the optional download port. If it is in the form
1565 hostname#portnumber, it's a UDP socket. If it is in the form
1566 hostname:filename, assume it's the TFTP filename that must be
1567 passed to the DDB board to tell it where to get the load file. */
1570 if (strchr (remote_name, '#'))
1572 udp_desc = serial_open (remote_name);
1574 perror_with_name ("Unable to open UDP port");
1579 /* Save the remote and local names of the TFTP temp file. If
1580 the user didn't specify a local name, assume it's the same
1581 as the part of the remote name after the "host:". */
1585 xfree (tftp_localname);
1586 if (local_name == NULL)
1587 if ((local_name = strchr (remote_name, ':')) != NULL)
1588 local_name++; /* skip over the colon */
1589 if (local_name == NULL)
1590 local_name = remote_name; /* local name same as remote name */
1591 tftp_name = xstrdup (remote_name);
1592 tftp_localname = xstrdup (local_name);
1600 /* Reset the expected monitor prompt if it's never been set before. */
1601 if (mips_monitor_prompt == NULL)
1602 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1603 mips_monitor = new_monitor;
1608 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1610 /* Switch to using remote target now. */
1613 inferior_ptid = remote_mips_ptid;
1614 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1615 add_thread_silent (inferior_ptid);
1617 /* Try to figure out the processor model if possible. */
1618 deprecated_mips_set_processor_regs_hack ();
1620 /* This is really the job of start_remote however, that makes an
1621 assumption that the target is about to print out a status message
1622 of some sort. That doesn't happen here (in fact, it may not be
1623 possible to get the monitor to send the appropriate packet). */
1625 reinit_frame_cache ();
1626 registers_changed ();
1627 stop_pc = regcache_read_pc (get_current_regcache ());
1628 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC);
1629 xfree (serial_port_name);
1633 mips_open (char *name, int from_tty)
1635 const char *monitor_prompt = NULL;
1636 if (gdbarch_bfd_arch_info (target_gdbarch) != NULL
1637 && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips)
1639 switch (gdbarch_bfd_arch_info (target_gdbarch)->mach)
1641 case bfd_mach_mips4100:
1642 case bfd_mach_mips4300:
1643 case bfd_mach_mips4600:
1644 case bfd_mach_mips4650:
1645 case bfd_mach_mips5000:
1646 monitor_prompt = "<RISQ> ";
1650 if (monitor_prompt == NULL)
1651 monitor_prompt = "<IDT>";
1652 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1656 pmon_open (char *name, int from_tty)
1658 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1662 ddb_open (char *name, int from_tty)
1664 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1667 /* Open a connection to a rockhopper board. */
1670 rockhopper_open (char *name, int from_tty)
1672 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1676 lsi_open (char *name, int from_tty)
1680 /* Clear the LSI breakpoint table. */
1681 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1682 lsi_breakpoints[i].type = BREAK_UNUSED;
1684 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1687 /* Close a connection to the remote board. */
1690 mips_close (int quitting)
1694 /* Get the board out of remote debugging mode. */
1695 (void) mips_exit_debug ();
1700 generic_mourn_inferior ();
1703 /* Detach from the remote board. */
1706 mips_detach (struct target_ops *ops, char *args, int from_tty)
1709 error ("Argument given to \"detach\" when remotely debugging.");
1716 printf_unfiltered ("Ending remote MIPS debugging.\n");
1719 /* Tell the target board to resume. This does not wait for a reply
1720 from the board, except in the case of single-stepping on LSI boards,
1721 where PMON does return a reply. */
1724 mips_resume (struct target_ops *ops,
1725 ptid_t ptid, int step, enum target_signal siggnal)
1729 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1730 a single step, so we wait for that. */
1731 mips_request (step ? 's' : 'c', 1, siggnal,
1732 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1733 mips_receive_wait, NULL);
1736 /* Return the signal corresponding to SIG, where SIG is the number which
1737 the MIPS protocol uses for the signal. */
1738 static enum target_signal
1739 mips_signal_from_protocol (int sig)
1741 /* We allow a few more signals than the IDT board actually returns, on
1742 the theory that there is at least *some* hope that perhaps the numbering
1743 for these signals is widely agreed upon. */
1746 return TARGET_SIGNAL_UNKNOWN;
1748 /* Don't want to use target_signal_from_host because we are converting
1749 from MIPS signal numbers, not host ones. Our internal numbers
1750 match the MIPS numbers for the signals the board can return, which
1751 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1752 return (enum target_signal) sig;
1755 /* Set the register designated by REGNO to the value designated by VALUE. */
1758 mips_set_register (int regno, ULONGEST value)
1760 char buf[MAX_REGISTER_SIZE];
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);
1765 /* We got the number the register holds, but gdb expects to see a
1766 value in the target byte ordering. */
1768 if (mips_monitor != MON_ROCKHOPPER
1769 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1770 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1771 In such cases we can only really debug 32-bit code properly so,
1772 when reading a GPR or the PC, assume that the full 64-bit
1773 value is the sign extension of the lower 32 bits. */
1774 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1777 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1780 regcache_raw_supply (regcache, regno, buf);
1783 /* Wait until the remote stops, and return a wait status. */
1786 mips_wait (struct target_ops *ops,
1787 ptid_t ptid, struct target_waitstatus *status, int options)
1791 char buff[DATA_MAXLEN];
1792 ULONGEST rpc, rfp, rsp;
1793 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1797 interrupt_count = 0;
1800 /* If we have not sent a single step or continue command, then the
1801 board is waiting for us to do something. Return a status
1802 indicating that it is stopped. */
1803 if (!mips_need_reply)
1805 status->kind = TARGET_WAITKIND_STOPPED;
1806 status->value.sig = TARGET_SIGNAL_TRAP;
1807 return inferior_ptid;
1810 /* No timeout; we sit here as long as the program continues to execute. */
1812 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1815 mips_error ("Remote failure: %s", safe_strerror (errno));
1817 /* On returning from a continue, the PMON monitor seems to start
1818 echoing back the messages we send prior to sending back the
1819 ACK. The code can cope with this, but to try and avoid the
1820 unnecessary serial traffic, and "spurious" characters displayed
1821 to the user, we cheat and reset the debug protocol. The problems
1822 seems to be caused by a check on the number of arguments, and the
1823 command length, within the monitor causing it to echo the command
1825 if (mips_monitor == MON_PMON)
1828 mips_enter_debug ();
1831 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1833 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1834 pc_string, fp_string, sp_string, flags);
1836 && read_hex_value (pc_string, &rpc)
1837 && read_hex_value (fp_string, &rfp)
1838 && read_hex_value (sp_string, &rsp))
1840 struct regcache *regcache = get_current_regcache ();
1841 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1843 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1844 mips_set_register (30, rfp);
1845 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1851 for (i = 0; i <= 2; i++)
1852 if (flags[i] == 'r' || flags[i] == 'w')
1854 else if (flags[i] == '\000')
1859 if (strcmp (target_shortname, "lsi") == 0)
1862 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1863 Right now, PMON doesn't give us enough information to determine which
1864 breakpoint we hit. So we have to look up the PC in our own table
1865 of breakpoints, and if found, assume it's just a normal instruction
1866 fetch breakpoint, not a data watchpoint. FIXME when PMON
1867 provides some way to tell us what type of breakpoint it is. */
1869 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1872 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1874 if (lsi_breakpoints[i].addr == pc
1875 && lsi_breakpoints[i].type == BREAK_FETCH)
1882 /* If a data breakpoint was hit, PMON returns the following packet:
1884 The return packet from an ordinary breakpoint doesn't have the
1885 extra 0x01 field tacked onto the end. */
1886 if (nfields == 1 && rpc == 1)
1891 /* NOTE: The following (sig) numbers are defined by PMON:
1892 SPP_SIGTRAP 5 breakpoint
1900 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1901 and so on, because the constants we want here are determined by the
1902 MIPS protocol and have nothing to do with what host we are running on. */
1903 if ((rstatus & 0xff) == 0)
1905 status->kind = TARGET_WAITKIND_EXITED;
1906 status->value.integer = (((rstatus) >> 8) & 0xff);
1908 else if ((rstatus & 0xff) == 0x7f)
1910 status->kind = TARGET_WAITKIND_STOPPED;
1911 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1913 /* If the stop PC is in the _exit function, assume
1914 we hit the 'break 0x3ff' instruction in _exit, so this
1915 is not a normal breakpoint. */
1916 if (strcmp (target_shortname, "lsi") == 0)
1919 CORE_ADDR func_start;
1920 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1922 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1923 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1924 && func_start == pc)
1925 status->kind = TARGET_WAITKIND_EXITED;
1930 status->kind = TARGET_WAITKIND_SIGNALLED;
1931 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1934 return inferior_ptid;
1937 /* We have to map between the register numbers used by gdb and the
1938 register numbers used by the debugging protocol. */
1940 #define REGNO_OFFSET 96
1943 mips_map_regno (struct gdbarch *gdbarch, int regno)
1947 if (regno >= mips_regnum (gdbarch)->fp0
1948 && regno < mips_regnum (gdbarch)->fp0 + 32)
1949 return regno - mips_regnum (gdbarch)->fp0 + 32;
1950 else if (regno == mips_regnum (gdbarch)->pc)
1951 return REGNO_OFFSET + 0;
1952 else if (regno == mips_regnum (gdbarch)->cause)
1953 return REGNO_OFFSET + 1;
1954 else if (regno == mips_regnum (gdbarch)->hi)
1955 return REGNO_OFFSET + 2;
1956 else if (regno == mips_regnum (gdbarch)->lo)
1957 return REGNO_OFFSET + 3;
1958 else if (regno == mips_regnum (gdbarch)->fp_control_status)
1959 return REGNO_OFFSET + 4;
1960 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
1961 return REGNO_OFFSET + 5;
1963 /* FIXME: Is there a way to get the status register? */
1967 /* Fetch the remote registers. */
1970 mips_fetch_registers (struct target_ops *ops,
1971 struct regcache *regcache, int regno)
1973 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1974 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1980 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
1981 mips_fetch_registers (ops, regcache, regno);
1985 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
1986 || regno == MIPS_ZERO_REGNUM)
1987 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
1988 supposed to read zero (see also mips-nat.c). */
1992 /* If PMON doesn't support this register, don't waste serial
1993 bandwidth trying to read it. */
1994 int pmon_reg = mips_map_regno (gdbarch, regno);
1995 if (regno != 0 && pmon_reg == 0)
1999 /* Unfortunately the PMON version in the Vr4300 board has been
2000 compiled without the 64bit register access commands. This
2001 means we cannot get hold of the full register width. */
2002 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2003 val = mips_request ('t', pmon_reg, 0,
2004 &err, mips_receive_wait, NULL);
2006 val = mips_request ('r', pmon_reg, 0,
2007 &err, mips_receive_wait, NULL);
2009 mips_error ("Can't read register %d: %s", regno,
2010 safe_strerror (errno));
2014 mips_set_register (regno, val);
2017 /* Prepare to store registers. The MIPS protocol can store individual
2018 registers, so this function doesn't have to do anything. */
2021 mips_prepare_to_store (struct regcache *regcache)
2025 /* Store remote register(s). */
2028 mips_store_registers (struct target_ops *ops,
2029 struct regcache *regcache, int regno)
2031 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2037 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2038 mips_store_registers (ops, regcache, regno);
2042 regcache_cooked_read_unsigned (regcache, regno, &val);
2043 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2044 mips_map_regno (gdbarch, regno),
2046 &err, mips_receive_wait, NULL);
2048 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2051 /* Fetch a word from the target board. Return word fetched in location
2052 addressed by VALP. Return 0 when successful; return positive error
2056 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2060 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2063 /* Data space failed; try instruction space. */
2064 *valp = mips_request ('i', addr, 0, &err,
2065 mips_receive_wait, NULL);
2070 /* Store a word to the target board. Returns errno code or zero for
2071 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2072 memory location there. */
2074 /* FIXME! make sure only 32-bit quantities get stored! */
2076 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2079 unsigned int oldcontents;
2081 oldcontents = mips_request ('D', addr, val, &err,
2082 mips_receive_wait, NULL);
2085 /* Data space failed; try instruction space. */
2086 oldcontents = mips_request ('I', addr, val, &err,
2087 mips_receive_wait, NULL);
2091 if (old_contents != NULL)
2092 *old_contents = oldcontents;
2096 /* Read or write LEN bytes from inferior memory at MEMADDR,
2097 transferring to or from debugger address MYADDR. Write to inferior
2098 if SHOULD_WRITE is nonzero. Returns length of data written or
2099 read; 0 for error. Note that protocol gives us the correct value
2100 for a longword, since it transfers values in ASCII. We want the
2101 byte values, so we have to swap the longword values. */
2103 static int mask_address_p = 1;
2106 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2107 struct mem_attrib *attrib, struct target_ops *target)
2109 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
2116 /* PMON targets do not cope well with 64 bit addresses. Mask the
2117 value down to 32 bits. */
2119 memaddr &= (CORE_ADDR) 0xffffffff;
2121 /* Round starting address down to longword boundary. */
2122 addr = memaddr & ~3;
2123 /* Round ending address up; get number of longwords that makes. */
2124 count = (((memaddr + len) - addr) + 3) / 4;
2125 /* Allocate buffer of that many longwords. */
2126 buffer = alloca (count * 4);
2130 /* Fill start and end extra bytes of buffer with existing data. */
2131 if (addr != memaddr || len < 4)
2135 if (mips_fetch_word (addr, &val))
2138 /* Need part of initial word -- fetch it. */
2139 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2146 /* Need part of last word -- fetch it. FIXME: we do this even
2147 if we don't need it. */
2148 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2151 store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order, val);
2154 /* Copy data to be written over corresponding part of buffer */
2156 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2158 /* Write the entire buffer. */
2160 for (i = 0; i < count; i++, addr += 4)
2163 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2164 status = mips_store_word (addr, word, NULL);
2165 /* Report each kilobyte (we download 32-bit words at a time) */
2168 printf_unfiltered ("*");
2169 gdb_flush (gdb_stdout);
2176 /* FIXME: Do we want a QUIT here? */
2179 printf_unfiltered ("\n");
2183 /* Read all the longwords */
2184 for (i = 0; i < count; i++, addr += 4)
2188 if (mips_fetch_word (addr, &val))
2191 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2195 /* Copy appropriate bytes out of the buffer. */
2196 memcpy (myaddr, buffer + (memaddr & 3), len);
2201 /* Print info on this target. */
2204 mips_files_info (struct target_ops *ignore)
2206 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2209 /* Kill the process running on the board. This will actually only
2210 work if we are doing remote debugging over the console input. I
2211 think that if IDT/sim had the remote debug interrupt enabled on the
2212 right port, we could interrupt the process with a break signal. */
2215 mips_kill (struct target_ops *ops)
2217 if (!mips_wait_flag)
2219 target_mourn_inferior ();
2225 if (interrupt_count >= 2)
2227 interrupt_count = 0;
2229 target_terminal_ours ();
2231 if (query (_("Interrupted while waiting for the program.\n\
2232 Give up (and stop debugging it)? ")))
2234 /* Clean up in such a way that mips_close won't try to talk to the
2235 board (it almost surely won't work since we weren't able to talk to
2240 printf_unfiltered ("Ending remote MIPS debugging.\n");
2241 target_mourn_inferior ();
2243 deprecated_throw_reason (RETURN_QUIT);
2246 target_terminal_inferior ();
2249 if (remote_debug > 0)
2250 printf_unfiltered ("Sending break\n");
2252 serial_send_break (mips_desc);
2254 target_mourn_inferior ();
2263 serial_write (mips_desc, &cc, 1);
2265 target_mourn_inferior ();
2270 /* Start running on the target board. */
2273 mips_create_inferior (struct target_ops *ops, char *execfile,
2274 char *args, char **env, int from_tty)
2281 Can't pass arguments to remote MIPS board; arguments ignored.");
2282 /* And don't try to use them on the next "run" command. */
2283 execute_command ("set args", 0);
2286 if (execfile == 0 || exec_bfd == 0)
2287 error ("No executable file specified");
2289 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2291 init_wait_for_inferior ();
2293 regcache_write_pc (get_current_regcache (), entry_pt);
2296 /* Clean up after a process. The bulk of the work is done in mips_close(),
2297 which is called when unpushing the target. */
2300 mips_mourn_inferior (struct target_ops *ops)
2302 if (current_ops != NULL)
2303 unpush_target (current_ops);
2306 /* We can write a breakpoint and read the shadow contents in one
2309 /* Insert a breakpoint. On targets that don't have built-in
2310 breakpoint support, we read the contents of the target location and
2311 stash it, then overwrite it with a breakpoint instruction. ADDR is
2312 the target location in the target machine. BPT is the breakpoint
2313 being inserted or removed, which contains memory for saving the
2317 mips_insert_breakpoint (struct gdbarch *gdbarch,
2318 struct bp_target_info *bp_tgt)
2320 if (monitor_supports_breakpoints)
2321 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2324 return memory_insert_breakpoint (gdbarch, bp_tgt);
2328 mips_remove_breakpoint (struct gdbarch *gdbarch,
2329 struct bp_target_info *bp_tgt)
2331 if (monitor_supports_breakpoints)
2332 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2335 return memory_remove_breakpoint (gdbarch, bp_tgt);
2338 /* Tell whether this target can support a hardware breakpoint. CNT
2339 is the number of hardware breakpoints already installed. This
2340 implements the target_can_use_hardware_watchpoint macro. */
2343 mips_can_use_watchpoint (int type, int cnt, int othertype)
2345 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2349 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2350 This is used for memory ref breakpoints. */
2352 static unsigned long
2353 calculate_mask (CORE_ADDR addr, int len)
2358 mask = addr ^ (addr + len - 1);
2360 for (i = 32; i >= 0; i--)
2366 mask = (unsigned long) 0xffffffff >> i;
2372 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2373 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2377 mips_insert_watchpoint (CORE_ADDR addr, int len, int type)
2379 if (mips_set_breakpoint (addr, len, type))
2386 mips_remove_watchpoint (CORE_ADDR addr, int len, int type)
2388 if (mips_clear_breakpoint (addr, len, type))
2395 mips_stopped_by_watchpoint (void)
2397 return hit_watchpoint;
2401 /* Insert a breakpoint. */
2404 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2406 return mips_common_breakpoint (1, addr, len, type);
2410 /* Clear a breakpoint. */
2413 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2415 return mips_common_breakpoint (0, addr, len, type);
2419 /* Check the error code from the return packet for an LSI breakpoint
2420 command. If there's no error, just return 0. If it's a warning,
2421 print the warning text and return 0. If it's an error, print
2422 the error text and return 1. <ADDR> is the address of the breakpoint
2423 that was being set. <RERRFLG> is the error code returned by PMON.
2424 This is a helper function for mips_common_breakpoint. */
2427 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2429 struct lsi_error *err;
2430 const char *saddr = paddress (target_gdbarch, addr);
2432 if (rerrflg == 0) /* no error */
2435 /* Warnings can be ORed together, so check them all. */
2436 if (rerrflg & W_WARN)
2438 if (monitor_warnings)
2441 for (err = lsi_warning_table; err->code != 0; err++)
2443 if ((err->code & rerrflg) == err->code)
2446 fprintf_unfiltered (gdb_stderr, "\
2447 mips_common_breakpoint (%s): Warning: %s\n",
2453 fprintf_unfiltered (gdb_stderr, "\
2454 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2461 /* Errors are unique, i.e. can't be ORed together. */
2462 for (err = lsi_error_table; err->code != 0; err++)
2464 if ((err->code & rerrflg) == err->code)
2466 fprintf_unfiltered (gdb_stderr, "\
2467 mips_common_breakpoint (%s): Error: %s\n",
2473 fprintf_unfiltered (gdb_stderr, "\
2474 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2481 /* This routine sends a breakpoint command to the remote target.
2483 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2484 <ADDR> is the address of the breakpoint.
2485 <LEN> the length of the region to break on.
2486 <TYPE> is the type of breakpoint:
2487 0 = write (BREAK_WRITE)
2488 1 = read (BREAK_READ)
2489 2 = read/write (BREAK_ACCESS)
2490 3 = instruction fetch (BREAK_FETCH)
2492 Return 0 if successful; otherwise 1. */
2495 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2497 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
2498 char buf[DATA_MAXLEN + 1];
2500 int rpid, rerrflg, rresponse, rlen;
2503 addr = gdbarch_addr_bits_remove (target_gdbarch, addr);
2505 if (mips_monitor == MON_LSI)
2507 if (set == 0) /* clear breakpoint */
2509 /* The LSI PMON "clear breakpoint" has this form:
2510 <pid> 'b' <bptn> 0x0
2512 <pid> 'b' 0x0 <code>
2514 <bptn> is a breakpoint number returned by an earlier 'B' command.
2515 Possible return codes: OK, E_BPT. */
2519 /* Search for the breakpoint in the table. */
2520 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2521 if (lsi_breakpoints[i].type == type
2522 && lsi_breakpoints[i].addr == addr
2523 && lsi_breakpoints[i].len == len)
2526 /* Clear the table entry and tell PMON to clear the breakpoint. */
2527 if (i == MAX_LSI_BREAKPOINTS)
2530 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2531 paddress (target_gdbarch, addr));
2535 lsi_breakpoints[i].type = BREAK_UNUSED;
2536 sprintf (buf, "0x0 b 0x%x 0x0", i);
2537 mips_send_packet (buf, 1);
2539 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2542 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2545 mips_common_breakpoint: Bad response from remote board: %s",
2548 return (mips_check_lsi_error (addr, rerrflg));
2551 /* set a breakpoint */
2553 /* The LSI PMON "set breakpoint" command has this form:
2554 <pid> 'B' <addr> 0x0
2556 <pid> 'B' <bptn> <code>
2558 The "set data breakpoint" command has this form:
2560 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2562 where: type= "0x1" = read
2564 "0x3" = access (read or write)
2566 The reply returns two values:
2567 bptn - a breakpoint number, which is a small integer with
2568 possible values of zero through 255.
2569 code - an error return code, a value of zero indicates a
2570 succesful completion, other values indicate various
2571 errors and warnings.
2573 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2577 if (type == BREAK_FETCH) /* instruction breakpoint */
2580 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2586 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2587 phex_nz (addr, addr_size),
2588 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2589 phex_nz (addr + len - 1, addr_size));
2591 mips_send_packet (buf, 1);
2593 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2596 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2597 &rpid, &rcmd, &rresponse, &rerrflg);
2598 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2600 mips_common_breakpoint: Bad response from remote board: %s",
2604 if (mips_check_lsi_error (addr, rerrflg))
2607 /* rresponse contains PMON's breakpoint number. Record the
2608 information for this breakpoint so we can clear it later. */
2609 lsi_breakpoints[rresponse].type = type;
2610 lsi_breakpoints[rresponse].addr = addr;
2611 lsi_breakpoints[rresponse].len = len;
2618 /* On non-LSI targets, the breakpoint command has this form:
2619 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2620 <MASK> is a don't care mask for addresses.
2621 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2625 mask = calculate_mask (addr, len);
2628 if (set) /* set a breakpoint */
2633 case BREAK_WRITE: /* write */
2636 case BREAK_READ: /* read */
2639 case BREAK_ACCESS: /* read/write */
2642 case BREAK_FETCH: /* fetch */
2646 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
2650 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2651 phex_nz (mask, addr_size), flags);
2656 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2659 mips_send_packet (buf, 1);
2661 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2664 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2665 &rpid, &rcmd, &rerrflg, &rresponse);
2667 if (nfields != 4 || rcmd != cmd)
2669 mips_common_breakpoint: Bad response from remote board: %s",
2674 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2675 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2676 if (mips_monitor == MON_DDB)
2677 rresponse = rerrflg;
2678 if (rresponse != 22) /* invalid argument */
2679 fprintf_unfiltered (gdb_stderr, "\
2680 mips_common_breakpoint (%s): Got error: 0x%x\n",
2681 paddress (target_gdbarch, addr), rresponse);
2689 send_srec (char *srec, int len, CORE_ADDR addr)
2695 serial_write (mips_desc, srec, len);
2697 ch = mips_readchar (remote_timeout);
2701 case SERIAL_TIMEOUT:
2702 error ("Timeout during download.");
2706 case 0x15: /* NACK */
2707 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n",
2708 paddress (target_gdbarch, addr));
2711 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2716 /* Download a binary file by converting it to S records. */
2719 mips_load_srec (char *args)
2723 char *buffer, srec[1024];
2725 unsigned int srec_frame = 200;
2727 static int hashmark = 1;
2729 buffer = alloca (srec_frame * 2 + 256);
2731 abfd = bfd_openr (args, 0);
2734 printf_filtered ("Unable to open file %s\n", args);
2738 if (bfd_check_format (abfd, bfd_object) == 0)
2740 printf_filtered ("File is not an object file\n");
2744 /* This actually causes a download in the IDT binary format: */
2745 mips_send_command (LOAD_CMD, 0);
2747 for (s = abfd->sections; s; s = s->next)
2749 if (s->flags & SEC_LOAD)
2751 unsigned int numbytes;
2753 /* FIXME! vma too small????? */
2754 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2756 (long) (s->vma + bfd_get_section_size (s)));
2757 gdb_flush (gdb_stdout);
2759 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2761 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2763 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2765 reclen = mips_make_srec (srec, '3', s->vma + i,
2767 send_srec (srec, reclen, s->vma + i);
2769 if (deprecated_ui_load_progress_hook)
2770 deprecated_ui_load_progress_hook (s->name, i);
2774 putchar_unfiltered ('#');
2775 gdb_flush (gdb_stdout);
2778 } /* Per-packet (or S-record) loop */
2780 putchar_unfiltered ('\n');
2781 } /* Loadable sections */
2784 putchar_unfiltered ('\n');
2786 /* Write a type 7 terminator record. no data for a type 7, and there
2787 is no data, so len is 0. */
2789 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2791 send_srec (srec, reclen, abfd->start_address);
2793 serial_flush_input (mips_desc);
2797 * mips_make_srec -- make an srecord. This writes each line, one at a
2798 * time, each with it's own header and trailer line.
2799 * An srecord looks like this:
2801 * byte count-+ address
2802 * start ---+ | | data +- checksum
2804 * S01000006F6B692D746573742E73726563E4
2805 * S315000448600000000000000000FC00005900000000E9
2806 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2807 * S30B0004485A0000000000004E
2810 * S<type><length><address><data><checksum>
2814 * is the number of bytes following upto the checksum. Note that
2815 * this is not the number of chars following, since it takes two
2816 * chars to represent a byte.
2820 * 1) two byte address data record
2821 * 2) three byte address data record
2822 * 3) four byte address data record
2823 * 7) four byte address termination record
2824 * 8) three byte address termination record
2825 * 9) two byte address termination record
2828 * is the start address of the data following, or in the case of
2829 * a termination record, the start address of the image
2833 * is the sum of all the raw byte data in the record, from the length
2834 * upwards, modulo 256 and subtracted from 255.
2836 * This routine returns the length of the S-record.
2841 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2844 unsigned char checksum;
2847 /* Create the header for the srec. addr_size is the number of bytes in the address,
2848 and 1 is the number of bytes in the count. */
2850 /* FIXME!! bigger buf required for 64-bit! */
2853 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2854 /* This assumes S3 style downloads (4byte addresses). There should
2855 probably be a check, or the code changed to make it more
2857 buf[3] = memaddr >> 24;
2858 buf[4] = memaddr >> 16;
2859 buf[5] = memaddr >> 8;
2861 memcpy (&buf[7], myaddr, len);
2863 /* Note that the checksum is calculated on the raw data, not the
2864 hexified data. It includes the length, address and the data
2865 portions of the packet. */
2867 buf += 2; /* Point at length byte */
2868 for (i = 0; i < len + 4 + 1; i++)
2876 /* The following manifest controls whether we enable the simple flow
2877 control support provided by the monitor. If enabled the code will
2878 wait for an affirmative ACK between transmitting packets. */
2879 #define DOETXACK (1)
2881 /* The PMON fast-download uses an encoded packet format constructed of
2882 3byte data packets (encoded as 4 printable ASCII characters), and
2883 escape sequences (preceded by a '/'):
2886 'C' compare checksum (12bit value, not included in checksum calculation)
2887 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2888 'Z' zero fill multiple of 3bytes
2889 'B' byte (12bit encoded value, of 8bit data)
2890 'A' address (36bit encoded value)
2891 'E' define entry as original address, and exit load
2893 The packets are processed in 4 character chunks, so the escape
2894 sequences that do not have any data (or variable length data)
2895 should be padded to a 4 character boundary. The decoder will give
2896 an error if the complete message block size is not a multiple of
2897 4bytes (size of record).
2899 The encoding of numbers is done in 6bit fields. The 6bit value is
2900 used to index into this string to get the specific character
2901 encoding for the value: */
2902 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2904 /* Convert the number of bits required into an encoded number, 6bits
2905 at a time (range 0..63). Keep a checksum if required (passed
2906 pointer non-NULL). The function returns the number of encoded
2907 characters written into the buffer. */
2909 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2911 int count = (n / 6);
2915 fprintf_unfiltered (gdb_stderr,
2916 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
2921 fprintf_unfiltered (gdb_stderr,
2922 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
2926 /* Deal with the checksum: */
2932 *chksum += ((v >> 24) & 0xFFF);
2934 *chksum += ((v >> 12) & 0xFFF);
2936 *chksum += ((v >> 0) & 0xFFF);
2943 *p++ = encoding[(v >> n) & 0x3F];
2950 /* Shorthand function (that could be in-lined) to output the zero-fill
2951 escape sequence into the data stream. */
2953 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
2957 sprintf (*buff, "/Z");
2958 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
2959 *buff += (count + 2);
2961 return (recsize + count + 2);
2965 pmon_checkset (int recsize, char **buff, int *value)
2969 /* Add the checksum (without updating the value): */
2970 sprintf (*buff, "/C");
2971 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
2972 *buff += (count + 2);
2973 sprintf (*buff, "\n");
2974 *buff += 2; /* include zero terminator */
2975 /* Forcing a checksum validation clears the sum: */
2977 return (recsize + count + 3);
2980 /* Amount of padding we leave after at the end of the output buffer,
2981 for the checksum and line termination characters: */
2982 #define CHECKSIZE (4 + 4 + 4 + 2)
2983 /* zero-fill, checksum, transfer end and line termination space. */
2985 /* The amount of binary data loaded from the object file in a single
2987 #define BINCHUNK (1024)
2989 /* Maximum line of data accepted by the monitor: */
2990 #define MAXRECSIZE (550)
2991 /* NOTE: This constant depends on the monitor being used. This value
2992 is for PMON 5.x on the Cogent Vr4300 board. */
2995 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
2996 int inamount, int *recsize, unsigned int *csum,
2997 unsigned int *zerofill)
3002 /* This is a simple check to ensure that our data will fit within
3003 the maximum allowable record size. Each record output is 4bytes
3004 in length. We must allow space for a pending zero fill command,
3005 the record, and a checksum record. */
3006 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3008 /* Process the binary data: */
3009 if ((inamount - *inptr) < 3)
3012 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3014 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3016 *recsize += (2 + count);
3021 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3022 /* Simple check for zero data. TODO: A better check would be
3023 to check the last, and then the middle byte for being zero
3024 (if the first byte is not). We could then check for
3025 following runs of zeros, and if above a certain size it is
3026 worth the 4 or 8 character hit of the byte insertions used
3027 to pad to the start of the zeroes. NOTE: This also depends
3028 on the alignment at the end of the zero run. */
3029 if (value == 0x00000000)
3032 if (*zerofill == 0xFFF) /* 12bit counter */
3033 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3038 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3039 count = pmon_makeb64 (value, p, 24, csum);
3052 pmon_check_ack (char *mesg)
3054 #if defined(DOETXACK)
3059 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3061 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3063 fprintf_unfiltered (gdb_stderr,
3064 "Failed to receive valid ACK for %s\n", mesg);
3065 return (-1); /* terminate the download */
3068 #endif /* DOETXACK */
3072 /* pmon_download - Send a sequence of characters to the PMON download port,
3073 which is either a serial port or a UDP socket. */
3076 pmon_start_download (void)
3080 /* Create the temporary download file. */
3081 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3082 perror_with_name (tftp_localname);
3086 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3087 mips_expect ("Downloading from ");
3088 mips_expect (udp_in_use ? "udp" : "tty0");
3089 mips_expect (", ^C to abort\r\n");
3094 mips_expect_download (char *string)
3096 if (!mips_expect (string))
3098 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3100 remove (tftp_localname); /* Remove temporary file */
3108 pmon_check_entry_address (char *entry_address, int final)
3110 char hexnumber[9]; /* includes '\0' space */
3111 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3112 sprintf (hexnumber, "%x", final);
3113 mips_expect (hexnumber);
3114 mips_expect ("\r\n");
3118 pmon_check_total (int bintotal)
3120 char hexnumber[9]; /* includes '\0' space */
3121 mips_expect ("\r\ntotal = 0x");
3122 sprintf (hexnumber, "%x", bintotal);
3123 mips_expect (hexnumber);
3124 return mips_expect_download (" bytes\r\n");
3128 pmon_end_download (int final, int bintotal)
3130 char hexnumber[9]; /* includes '\0' space */
3134 static char *load_cmd_prefix = "load -b -s ";
3138 /* Close off the temporary file containing the load data. */
3142 /* Make the temporary file readable by the world. */
3143 if (stat (tftp_localname, &stbuf) == 0)
3144 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3146 /* Must reinitialize the board to prevent PMON from crashing. */
3147 if (mips_monitor != MON_ROCKHOPPER)
3148 mips_send_command ("initEther\r", -1);
3150 /* Send the load command. */
3151 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3152 strcpy (cmd, load_cmd_prefix);
3153 strcat (cmd, tftp_name);
3155 mips_send_command (cmd, 0);
3157 if (!mips_expect_download ("Downloading from "))
3159 if (!mips_expect_download (tftp_name))
3161 if (!mips_expect_download (", ^C to abort\r\n"))
3165 /* Wait for the stuff that PMON prints after the load has completed.
3166 The timeout value for use in the tftp case (15 seconds) was picked
3167 arbitrarily but might be too small for really large downloads. FIXME. */
3168 switch (mips_monitor)
3171 pmon_check_ack ("termination");
3172 pmon_check_entry_address ("Entry address is ", final);
3173 if (!pmon_check_total (bintotal))
3176 case MON_ROCKHOPPER:
3177 if (!pmon_check_total (bintotal))
3179 pmon_check_entry_address ("Entry Address = ", final);
3182 pmon_check_entry_address ("Entry Address = ", final);
3183 pmon_check_ack ("termination");
3184 if (!pmon_check_total (bintotal))
3190 remove (tftp_localname); /* Remove temporary file */
3194 pmon_download (char *buffer, int length)
3197 fwrite (buffer, 1, length, tftp_file);
3199 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3203 pmon_load_fast (char *file)
3207 unsigned char *binbuf;
3210 unsigned int csum = 0;
3211 int hashmark = !tftp_in_use;
3216 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3217 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3219 abfd = bfd_openr (file, 0);
3222 printf_filtered ("Unable to open file %s\n", file);
3226 if (bfd_check_format (abfd, bfd_object) == 0)
3228 printf_filtered ("File is not an object file\n");
3232 /* Setup the required download state: */
3233 mips_send_command ("set dlproto etxack\r", -1);
3234 mips_send_command ("set dlecho off\r", -1);
3235 /* NOTE: We get a "cannot set variable" message if the variable is
3236 already defined to have the argument we give. The code doesn't
3237 care, since it just scans to the next prompt anyway. */
3238 /* Start the download: */
3239 pmon_start_download ();
3241 /* Zero the checksum */
3242 sprintf (buffer, "/Kxx\n");
3243 reclen = strlen (buffer);
3244 pmon_download (buffer, reclen);
3245 finished = pmon_check_ack ("/Kxx");
3247 for (s = abfd->sections; s && !finished; s = s->next)
3248 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3250 bintotal += bfd_get_section_size (s);
3251 final = (s->vma + bfd_get_section_size (s));
3253 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3254 (unsigned int) (s->vma + bfd_get_section_size (s)));
3255 gdb_flush (gdb_stdout);
3257 /* Output the starting address */
3258 sprintf (buffer, "/A");
3259 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3260 buffer[2 + reclen] = '\n';
3261 buffer[3 + reclen] = '\0';
3262 reclen += 3; /* for the initial escape code and carriage return */
3263 pmon_download (buffer, reclen);
3264 finished = pmon_check_ack ("/A");
3268 unsigned int binamount;
3269 unsigned int zerofill = 0;
3276 i < bfd_get_section_size (s) && !finished;
3281 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3283 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3285 /* This keeps a rolling checksum, until we decide to output
3287 for (; ((binamount - binptr) > 0);)
3289 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3290 &reclen, &csum, &zerofill);
3291 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3293 reclen = pmon_checkset (reclen, &bp, &csum);
3294 pmon_download (buffer, reclen);
3295 finished = pmon_check_ack ("data record");
3298 zerofill = 0; /* do not transmit pending zerofills */
3302 if (deprecated_ui_load_progress_hook)
3303 deprecated_ui_load_progress_hook (s->name, i);
3307 putchar_unfiltered ('#');
3308 gdb_flush (gdb_stdout);
3312 reclen = 0; /* buffer processed */
3317 /* Ensure no out-standing zerofill requests: */
3319 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3321 /* and then flush the line: */
3324 reclen = pmon_checkset (reclen, &bp, &csum);
3325 /* Currently pmon_checkset outputs the line terminator by
3326 default, so we write out the buffer so far: */
3327 pmon_download (buffer, reclen);
3328 finished = pmon_check_ack ("record remnant");
3332 putchar_unfiltered ('\n');
3335 /* Terminate the transfer. We know that we have an empty output
3336 buffer at this point. */
3337 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3338 reclen = strlen (buffer);
3339 pmon_download (buffer, reclen);
3342 { /* Ignore the termination message: */
3343 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3346 { /* Deal with termination message: */
3347 pmon_end_download (final, bintotal);
3353 /* mips_load -- download a file. */
3356 mips_load (char *file, int from_tty)
3358 struct regcache *regcache;
3360 /* Get the board out of remote debugging mode. */
3361 if (mips_exit_debug ())
3362 error ("mips_load: Couldn't get into monitor mode.");
3364 if (mips_monitor != MON_IDT)
3365 pmon_load_fast (file);
3367 mips_load_srec (file);
3371 /* Finally, make the PC point at the start address */
3372 regcache = get_current_regcache ();
3373 if (mips_monitor != MON_IDT)
3375 /* Work around problem where PMON monitor updates the PC after a load
3376 to a different value than GDB thinks it has. The following ensures
3377 that the regcache_write_pc() WILL update the PC value: */
3378 regcache_invalidate (regcache,
3379 mips_regnum (get_regcache_arch (regcache))->pc);
3382 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3385 /* Check to see if a thread is still alive. */
3388 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3390 if (ptid_equal (ptid, remote_mips_ptid))
3391 /* The monitor's task is always alive. */
3397 /* Convert a thread ID to a string. Returns the string in a static
3401 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3403 static char buf[64];
3405 if (ptid_equal (ptid, remote_mips_ptid))
3407 xsnprintf (buf, sizeof buf, "Thread <main>");
3411 return normal_pid_to_str (ptid);
3414 /* Pass the command argument as a packet to PMON verbatim. */
3417 pmon_command (char *args, int from_tty)
3419 char buf[DATA_MAXLEN + 1];
3422 sprintf (buf, "0x0 %s", args);
3423 mips_send_packet (buf, 1);
3424 printf_filtered ("Send packet: %s\n", buf);
3426 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3428 printf_filtered ("Received packet: %s\n", buf);
3431 extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */
3434 _initialize_remote_mips (void)
3436 /* Initialize the fields in mips_ops that are common to all four targets. */
3437 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3438 mips_ops.to_close = mips_close;
3439 mips_ops.to_detach = mips_detach;
3440 mips_ops.to_resume = mips_resume;
3441 mips_ops.to_fetch_registers = mips_fetch_registers;
3442 mips_ops.to_store_registers = mips_store_registers;
3443 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3444 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3445 mips_ops.to_files_info = mips_files_info;
3446 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3447 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3448 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3449 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3450 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3451 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3452 mips_ops.to_kill = mips_kill;
3453 mips_ops.to_load = mips_load;
3454 mips_ops.to_create_inferior = mips_create_inferior;
3455 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3456 mips_ops.to_thread_alive = mips_thread_alive;
3457 mips_ops.to_pid_to_str = mips_pid_to_str;
3458 mips_ops.to_log_command = serial_log_command;
3459 mips_ops.to_stratum = process_stratum;
3460 mips_ops.to_has_all_memory = default_child_has_all_memory;
3461 mips_ops.to_has_memory = default_child_has_memory;
3462 mips_ops.to_has_stack = default_child_has_stack;
3463 mips_ops.to_has_registers = default_child_has_registers;
3464 mips_ops.to_has_execution = default_child_has_execution;
3465 mips_ops.to_magic = OPS_MAGIC;
3467 /* Copy the common fields to all four target vectors. */
3468 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3470 /* Initialize target-specific fields in the target vectors. */
3471 mips_ops.to_shortname = "mips";
3472 mips_ops.to_doc = "\
3473 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3474 The argument is the device it is connected to or, if it contains a colon,\n\
3475 HOST:PORT to access a board over a network";
3476 mips_ops.to_open = mips_open;
3477 mips_ops.to_wait = mips_wait;
3479 pmon_ops.to_shortname = "pmon";
3480 pmon_ops.to_doc = "\
3481 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3482 line. The argument is the device it is connected to or, if it contains a\n\
3483 colon, HOST:PORT to access a board over a network";
3484 pmon_ops.to_open = pmon_open;
3485 pmon_ops.to_wait = mips_wait;
3487 ddb_ops.to_shortname = "ddb";
3489 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3490 line. The first argument is the device it is connected to or, if it contains\n\
3491 a colon, HOST:PORT to access a board over a network. The optional second\n\
3492 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3493 TFTP downloads to the board. The optional third parameter is the local name\n\
3494 of the TFTP temporary file, if it differs from the filename seen by the board.";
3495 ddb_ops.to_open = ddb_open;
3496 ddb_ops.to_wait = mips_wait;
3498 rockhopper_ops.to_shortname = "rockhopper";
3499 rockhopper_ops.to_doc = ddb_ops.to_doc;
3500 rockhopper_ops.to_open = rockhopper_open;
3501 rockhopper_ops.to_wait = mips_wait;
3503 lsi_ops.to_shortname = "lsi";
3504 lsi_ops.to_doc = pmon_ops.to_doc;
3505 lsi_ops.to_open = lsi_open;
3506 lsi_ops.to_wait = mips_wait;
3508 /* Add the targets. */
3509 add_target (&mips_ops);
3510 add_target (&pmon_ops);
3511 add_target (&ddb_ops);
3512 add_target (&lsi_ops);
3513 add_target (&rockhopper_ops);
3515 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3516 Set timeout in seconds for remote MIPS serial I/O."), _("\
3517 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3519 NULL, /* FIXME: i18n: */
3520 &setlist, &showlist);
3522 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3523 &mips_retransmit_wait, _("\
3524 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3525 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3526 This is the number of seconds to wait for an acknowledgement to a packet\n\
3527 before resending the packet."),
3529 NULL, /* FIXME: i18n: */
3530 &setlist, &showlist);
3532 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3533 &mips_syn_garbage, _("\
3534 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3535 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3536 This is the maximum number of characters GDB will ignore when trying to\n\
3537 synchronize with the remote system. A value of -1 means that there is no\n\
3538 limit. (Note that these characters are printed out even though they are\n\
3541 NULL, /* FIXME: i18n: */
3542 &setlist, &showlist);
3544 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3545 &mips_monitor_prompt, _("\
3546 Set the prompt that GDB expects from the monitor."), _("\
3547 Show the prompt that GDB expects from the monitor."), NULL,
3549 NULL, /* FIXME: i18n: */
3550 &setlist, &showlist);
3552 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3553 &monitor_warnings, _("\
3554 Set printing of monitor warnings."), _("\
3555 Show printing of monitor warnings."), _("\
3556 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3558 NULL, /* FIXME: i18n: */
3559 &setlist, &showlist);
3561 add_com ("pmon", class_obscure, pmon_command,
3562 _("Send a packet to PMON (must be in debug mode)."));
3564 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3565 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3566 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3567 Use \"on\" to enable the masking and \"off\" to disable it."),
3569 NULL, /* FIXME: i18n: */
3570 &setlist, &showlist);
3571 remote_mips_ptid = ptid_build (42000, 0, 42000);