1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by Ian Lance Taylor
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
31 #include "exceptions.h"
32 #include "gdb_string.h"
34 #include "gdb_usleep.h"
37 #include "mips-tdep.h"
38 #include "gdbthread.h"
42 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
43 types passed by breakpoint.c to target_insert_watchpoint.
44 Value 3 is our own invention, and is used for ordinary instruction
45 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
55 /* Prototypes for local functions. */
57 static int mips_readchar (int timeout);
59 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
62 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
63 int *pch, int timeout);
65 static int mips_cksum (const unsigned char *hdr,
66 const char *data, int len);
68 static void mips_send_packet (const char *s, int get_ack);
70 static void mips_send_command (const char *cmd, int prompt);
72 static int mips_receive_packet (char *buff, int throw_error, int timeout);
74 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
75 int *perr, int timeout, char *buff);
77 static void mips_initialize (void);
79 static void mips_open (char *name, int from_tty);
81 static void pmon_open (char *name, int from_tty);
83 static void ddb_open (char *name, int from_tty);
85 static void lsi_open (char *name, int from_tty);
87 static void mips_close (void);
89 static int mips_map_regno (struct gdbarch *, int);
91 static void mips_set_register (int regno, ULONGEST value);
93 static void mips_prepare_to_store (struct regcache *regcache);
95 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
97 static int mips_store_word (CORE_ADDR addr, unsigned int value,
100 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
102 struct mem_attrib *attrib,
103 struct target_ops *target);
105 static void mips_files_info (struct target_ops *ignore);
107 static void mips_mourn_inferior (struct target_ops *ops);
109 static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum);
111 static int pmon_zeroset (int recsize, char **buff, unsigned int *amount,
112 unsigned int *chksum);
114 static int pmon_checkset (int recsize, char **buff, unsigned int *value);
116 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
117 int *inptr, int inamount, int *recsize,
118 unsigned int *csum, unsigned int *zerofill);
120 static int pmon_check_ack (char *mesg);
122 static void pmon_start_download (void);
124 static void pmon_end_download (int final, int bintotal);
126 static void pmon_download (char *buffer, int length);
128 static void pmon_load_fast (char *file);
130 static void mips_load (char *file, int from_tty);
132 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
133 unsigned char *myaddr, int len);
135 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
137 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
138 enum break_type type);
140 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
141 enum break_type type);
143 /* Forward declarations. */
144 extern struct target_ops mips_ops;
145 extern struct target_ops pmon_ops;
146 extern struct target_ops ddb_ops;
147 extern struct target_ops rockhopper_ops;
149 /* The MIPS remote debugging interface is built on top of a simple
150 packet protocol. Each packet is organized as follows:
152 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
153 may not appear anywhere else in the packet. Any time a SYN is
154 seen, a new packet should be assumed to have begun.
157 This byte contains the upper five bits of the logical length
158 of the data section, plus a single bit indicating whether this
159 is a data packet or an acknowledgement. The documentation
160 indicates that this bit is 1 for a data packet, but the actual
161 board uses 1 for an acknowledgement. The value of the byte is
162 0x40 + (ack ? 0x20 : 0) + (len >> 6)
163 (we always have 0 <= len < 1024). Acknowledgement packets do
164 not carry data, and must have a data length of 0.
166 LEN1 This byte contains the lower six bits of the logical length of
167 the data section. The value is
170 SEQ This byte contains the six bit sequence number of the packet.
173 An acknowlegment packet contains the sequence number of the
174 packet being acknowledged plus 1 modulo 64. Data packets are
175 transmitted in sequence. There may only be one outstanding
176 unacknowledged data packet at a time. The sequence numbers
177 are independent in each direction. If an acknowledgement for
178 the previous packet is received (i.e., an acknowledgement with
179 the sequence number of the packet just sent) the packet just
180 sent should be retransmitted. If no acknowledgement is
181 received within a timeout period, the packet should be
182 retransmitted. This has an unfortunate failure condition on a
183 high-latency line, as a delayed acknowledgement may lead to an
184 endless series of duplicate packets.
186 DATA The actual data bytes follow. The following characters are
187 escaped inline with DLE (ASCII 020, or ^P):
193 The additional DLE characters are not counted in the logical
194 length stored in the TYPE_LEN and LEN1 bytes.
199 These bytes contain an 18 bit checksum of the complete
200 contents of the packet excluding the SEQ byte and the
201 CSUM[123] bytes. The checksum is simply the twos complement
202 addition of all the bytes treated as unsigned characters. The
203 values of the checksum bytes are:
204 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
205 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
206 CSUM3: 0x40 + (cksum & 0x3f)
208 It happens that the MIPS remote debugging protocol always
209 communicates with ASCII strings. Because of this, this
210 implementation doesn't bother to handle the DLE quoting mechanism,
211 since it will never be required. */
215 /* The SYN character which starts each packet. */
218 /* The 0x40 used to offset each packet (this value ensures that all of
219 the header and trailer bytes, other than SYN, are printable ASCII
221 #define HDR_OFFSET 0x40
223 /* The indices of the bytes in the packet header. */
224 #define HDR_INDX_SYN 0
225 #define HDR_INDX_TYPE_LEN 1
226 #define HDR_INDX_LEN1 2
227 #define HDR_INDX_SEQ 3
230 /* The data/ack bit in the TYPE_LEN header byte. */
231 #define TYPE_LEN_DA_BIT 0x20
232 #define TYPE_LEN_DATA 0
233 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
235 /* How to compute the header bytes. */
236 #define HDR_SET_SYN(data, len, seq) (SYN)
237 #define HDR_SET_TYPE_LEN(data, len, seq) \
239 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
240 + (((len) >> 6) & 0x1f))
241 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
242 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
244 /* Check that a header byte is reasonable. */
245 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
247 /* Get data from the header. These macros evaluate their argument
249 #define HDR_IS_DATA(hdr) \
250 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
251 #define HDR_GET_LEN(hdr) \
252 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
253 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
255 /* The maximum data length. */
256 #define DATA_MAXLEN 1023
258 /* The trailer offset. */
259 #define TRLR_OFFSET HDR_OFFSET
261 /* The indices of the bytes in the packet trailer. */
262 #define TRLR_INDX_CSUM1 0
263 #define TRLR_INDX_CSUM2 1
264 #define TRLR_INDX_CSUM3 2
265 #define TRLR_LENGTH 3
267 /* How to compute the trailer bytes. */
268 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
269 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
270 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
272 /* Check that a trailer byte is reasonable. */
273 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
275 /* Get data from the trailer. This evaluates its argument multiple
277 #define TRLR_GET_CKSUM(trlr) \
278 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
279 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
280 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
282 /* The sequence number modulos. */
283 #define SEQ_MODULOS (64)
285 /* PMON commands to load from the serial port or UDP socket. */
286 #define LOAD_CMD "load -b -s tty0\r"
287 #define LOAD_CMD_UDP "load -b -s udp\r"
289 /* The target vectors for the four different remote MIPS targets.
290 These are initialized with code in _initialize_remote_mips instead
291 of static initializers, to make it easier to extend the target_ops
293 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
295 enum mips_monitor_type
297 /* IDT/SIM monitor being used: */
299 /* PMON monitor being used: */
300 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET]
301 Algorithmics Ltd. Nov 9 1995 17:19:50 */
302 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET]
303 Risq Modular Systems,
304 Thu Jun 6 09:28:40 PDT 1996 */
305 MON_LSI, /* 4.3.12 [EB,FP],
306 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
308 /* Last and unused value, for sizing vectors, etc. */
311 static enum mips_monitor_type mips_monitor = MON_LAST;
313 /* The monitor prompt text. If the user sets the PMON prompt
314 to some new value, the GDB `set monitor-prompt' command must also
315 be used to inform GDB about the expected prompt. Otherwise, GDB
316 will not be able to connect to PMON in mips_initialize().
317 If the `set monitor-prompt' command is not used, the expected
318 default prompt will be set according the target:
325 static char *mips_monitor_prompt;
327 /* Set to 1 if the target is open. */
328 static int mips_is_open;
330 /* Currently active target description (if mips_is_open == 1). */
331 static struct target_ops *current_ops;
333 /* Set to 1 while the connection is being initialized. */
334 static int mips_initializing;
336 /* Set to 1 while the connection is being brought down. */
337 static int mips_exiting;
339 /* The next sequence number to send. */
340 static unsigned int mips_send_seq;
342 /* The next sequence number we expect to receive. */
343 static unsigned int mips_receive_seq;
345 /* The time to wait before retransmitting a packet, in seconds. */
346 static int mips_retransmit_wait = 3;
348 /* The number of times to try retransmitting a packet before giving up. */
349 static int mips_send_retries = 10;
351 /* The number of garbage characters to accept when looking for an
352 SYN for the next packet. */
353 static int mips_syn_garbage = 10;
355 /* The time to wait for a packet, in seconds. */
356 static int mips_receive_wait = 5;
358 /* Set if we have sent a packet to the board but have not yet received
360 static int mips_need_reply = 0;
362 /* Handle used to access serial I/O stream. */
363 static struct serial *mips_desc;
365 /* UDP handle used to download files to target. */
366 static struct serial *udp_desc;
367 static int udp_in_use;
369 /* TFTP filename used to download files to DDB board, in the form
371 static char *tftp_name; /* host:filename */
372 static char *tftp_localname; /* filename portion of above */
373 static int tftp_in_use;
374 static FILE *tftp_file;
376 /* Counts the number of times the user tried to interrupt the target (usually
378 static int interrupt_count;
380 /* If non-zero, means that the target is running. */
381 static int mips_wait_flag = 0;
383 /* If non-zero, monitor supports breakpoint commands. */
384 static int monitor_supports_breakpoints = 0;
386 /* Data cache header. */
388 #if 0 /* not used (yet?) */
389 static DCACHE *mips_dcache;
392 /* Non-zero means that we've just hit a read or write watchpoint. */
393 static int hit_watchpoint;
395 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
396 The table is indexed by a breakpoint number, which is an integer
397 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
399 #define MAX_LSI_BREAKPOINTS 256
400 struct lsi_breakpoint_info
402 enum break_type type; /* type of breakpoint */
403 CORE_ADDR addr; /* address of breakpoint */
404 int len; /* length of region being watched */
405 unsigned long value; /* value to watch */
407 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
409 /* Error/warning codes returned by LSI PMON for breakpoint commands.
410 Warning values may be ORed together; error values may not. */
411 #define W_WARN 0x100 /* This bit is set if the error code
413 #define W_MSK 0x101 /* warning: Range feature is supported
415 #define W_VAL 0x102 /* warning: Value check is not
416 supported in hardware */
417 #define W_QAL 0x104 /* warning: Requested qualifiers are
418 not supported in hardware */
420 #define E_ERR 0x200 /* This bit is set if the error code
422 #define E_BPT 0x200 /* error: No such breakpoint number */
423 #define E_RGE 0x201 /* error: Range is not supported */
424 #define E_QAL 0x202 /* error: The requested qualifiers can
426 #define E_OUT 0x203 /* error: Out of hardware resources */
427 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
431 int code; /* error code */
432 char *string; /* string associated with this code */
435 struct lsi_error lsi_warning_table[] =
437 {W_MSK, "Range feature is supported via mask"},
438 {W_VAL, "Value check is not supported in hardware"},
439 {W_QAL, "Requested qualifiers are not supported in hardware"},
443 struct lsi_error lsi_error_table[] =
445 {E_BPT, "No such breakpoint number"},
446 {E_RGE, "Range is not supported"},
447 {E_QAL, "The requested qualifiers can not be used"},
448 {E_OUT, "Out of hardware resources"},
449 {E_NON, "Hardware breakpoint not supported"},
453 /* Set to 1 with the 'set monitor-warnings' command to enable printing
454 of warnings returned by PMON when hardware breakpoints are used. */
455 static int monitor_warnings;
457 /* This is the ptid we use while we're connected to the remote. Its
458 value is arbitrary, as the remote-mips target doesn't have a notion of
459 processes or threads, but we need something non-null to place in
461 static ptid_t remote_mips_ptid;
463 /* Close any ports which might be open. Reset certain globals indicating
464 the state of those ports. */
470 serial_close (mips_desc);
474 serial_close (udp_desc);
480 /* Handle low-level error that we can't recover from. Note that just
481 error()ing out from target_wait or some such low-level place will cause
482 all hell to break loose--the rest of GDB will tend to get left in an
483 inconsistent state. */
485 static void ATTRIBUTE_NORETURN
486 mips_error (char *string,...)
491 target_terminal_ours ();
492 wrap_here (""); /* Force out any buffered output. */
493 gdb_flush (gdb_stdout);
494 gdb_flush (gdb_stderr);
496 /* Clean up in such a way that mips_close won't try to talk to the
497 board (it almost surely won't work since we weren't able to talk to
501 if (!ptid_equal (inferior_ptid, null_ptid))
502 target_mourn_inferior ();
504 fmt = concat (_("Ending remote MIPS debugging: "),
505 string, (char *) NULL);
506 make_cleanup (xfree, fmt);
508 va_start (args, string);
509 throw_verror (TARGET_CLOSE_ERROR, fmt, args);
513 /* putc_readable - print a character, displaying non-printable chars in
514 ^x notation or in hex. */
517 fputc_readable (int ch, struct ui_file *file)
520 fputc_unfiltered ('\n', file);
522 fprintf_unfiltered (file, "\\r");
523 else if (ch < 0x20) /* ASCII control character */
524 fprintf_unfiltered (file, "^%c", ch + '@');
525 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
526 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
528 fputc_unfiltered (ch, file);
532 /* puts_readable - print a string, displaying non-printable chars in
533 ^x notation or in hex. */
536 fputs_readable (const char *string, struct ui_file *file)
540 while ((c = *string++) != '\0')
541 fputc_readable (c, file);
545 /* Read P as a hex value. Return true if every character made sense,
546 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
549 read_hex_value (const char *p, ULONGEST *result)
557 if (*p >= '0' && *p <= '9')
559 else if (*p >= 'A' && *p <= 'F')
560 retval |= *p - 'A' + 10;
561 else if (*p >= 'a' && *p <= 'f')
562 retval |= *p - 'a' + 10;
572 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
573 timed out. TIMEOUT specifies timeout value in seconds. */
576 mips_expect_timeout (const char *string, int timeout)
578 const char *p = string;
582 fprintf_unfiltered (gdb_stdlog, "Expected \"");
583 fputs_readable (string, gdb_stdlog);
584 fprintf_unfiltered (gdb_stdlog, "\", got \"");
593 /* Must use serial_readchar() here cuz mips_readchar would get
594 confused if we were waiting for the mips_monitor_prompt... */
596 c = serial_readchar (mips_desc, timeout);
598 if (c == SERIAL_TIMEOUT)
601 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
606 fputc_readable (c, gdb_stdlog);
614 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
627 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
628 timed out. The timeout value is hard-coded to 2 seconds. Use
629 mips_expect_timeout if a different timeout value is needed. */
632 mips_expect (const char *string)
634 return mips_expect_timeout (string, remote_timeout);
637 /* Read a character from the remote, aborting on error. Returns
638 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
639 returns). FIXME: If we see the string mips_monitor_prompt from the
640 board, then we are debugging on the main console port, and we have
641 somehow dropped out of remote debugging mode. In this case, we
642 automatically go back in to remote debugging mode. This is a hack,
643 put in because I can't find any way for a program running on the
644 remote board to terminate without also ending remote debugging
645 mode. I assume users won't have any trouble with this; for one
646 thing, the IDT documentation generally assumes that the remote
647 debugging port is not the console port. This is, however, very
648 convenient for DejaGnu when you only have one connected serial
652 mips_readchar (int timeout)
655 static int state = 0;
656 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
658 { /* FIXME this whole block is dead code! */
662 if (i == -1 && watchdog > 0)
666 if (state == mips_monitor_prompt_len)
668 ch = serial_readchar (mips_desc, timeout);
670 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */
672 target_mourn_inferior ();
673 error (_("Watchdog has expired. Target detached."));
676 if (ch == SERIAL_EOF)
677 mips_error (_("End of file from remote"));
678 if (ch == SERIAL_ERROR)
679 mips_error (_("Error reading from remote: %s"), safe_strerror (errno));
680 if (remote_debug > 1)
682 /* Don't use _filtered; we can't deal with a QUIT out of
683 target_wait, and I think this might be called from there. */
684 if (ch != SERIAL_TIMEOUT)
685 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
687 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
690 /* If we have seen mips_monitor_prompt and we either time out, or
691 we see a @ (which was echoed from a packet we sent), reset the
692 board as described above. The first character in a packet after
693 the SYN (which is not echoed) is always an @ unless the packet is
694 more than 64 characters long, which ours never are. */
695 if ((ch == SERIAL_TIMEOUT || ch == '@')
696 && state == mips_monitor_prompt_len
697 && !mips_initializing
700 if (remote_debug > 0)
701 /* Don't use _filtered; we can't deal with a QUIT out of
702 target_wait, and I think this might be called from there. */
703 fprintf_unfiltered (gdb_stdlog,
704 "Reinitializing MIPS debugging mode\n");
711 /* At this point, about the only thing we can do is abort the command
712 in progress and get back to command level as quickly as possible. */
714 error (_("Remote board reset, debug protocol re-initialized."));
717 if (ch == mips_monitor_prompt[state])
725 /* Get a packet header, putting the data in the supplied buffer.
726 PGARBAGE is a pointer to the number of garbage characters received
727 so far. CH is the last character received. Returns 0 for success,
728 or -1 for timeout. */
731 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
737 /* Wait for a SYN. mips_syn_garbage is intended to prevent
738 sitting here indefinitely if the board sends us one garbage
739 character per second. ch may already have a value from the
740 last time through the loop. */
743 ch = mips_readchar (timeout);
744 if (ch == SERIAL_TIMEOUT)
748 /* Printing the character here lets the user of gdb see
749 what the program is outputting, if the debugging is
750 being done on the console port. Don't use _filtered:
751 we can't deal with a QUIT out of target_wait and
752 buffered target output confuses the user. */
753 if (!mips_initializing || remote_debug > 0)
755 if (isprint (ch) || isspace (ch))
757 fputc_unfiltered (ch, gdb_stdtarg);
761 fputc_readable (ch, gdb_stdtarg);
763 gdb_flush (gdb_stdtarg);
766 /* Only count unprintable characters. */
767 if (! (isprint (ch) || isspace (ch)))
770 if (mips_syn_garbage > 0
771 && *pgarbage > mips_syn_garbage)
772 mips_error (_("Debug protocol failure: more "
773 "than %d characters before a sync."),
778 /* Get the packet header following the SYN. */
779 for (i = 1; i < HDR_LENGTH; i++)
781 ch = mips_readchar (timeout);
782 if (ch == SERIAL_TIMEOUT)
784 /* Make sure this is a header byte. */
785 if (ch == SYN || !HDR_CHECK (ch))
791 /* If we got the complete header, we can return. Otherwise we
792 loop around and keep looking for SYN. */
798 /* Get a packet header, putting the data in the supplied buffer.
799 PGARBAGE is a pointer to the number of garbage characters received
800 so far. The last character read is returned in *PCH. Returns 0
801 for success, -1 for timeout, -2 for error. */
804 mips_receive_trailer (unsigned char *trlr, int *pgarbage,
805 int *pch, int timeout)
810 for (i = 0; i < TRLR_LENGTH; i++)
812 ch = mips_readchar (timeout);
814 if (ch == SERIAL_TIMEOUT)
816 if (!TRLR_CHECK (ch))
823 /* Get the checksum of a packet. HDR points to the packet header.
824 DATASTR points to the packet data. LEN is the length of DATASTR. */
827 mips_cksum (const unsigned char *hdr, const char *datastr, int len)
829 const unsigned char *p;
830 const unsigned char *data = (const unsigned char *) datastr;
836 /* The initial SYN is not included in the checksum. */
850 /* Send a packet containing the given ASCII string. */
853 mips_send_packet (const char *s, int get_ack)
855 /* unsigned */ int len;
856 unsigned char *packet;
861 if (len > DATA_MAXLEN)
862 mips_error (_("MIPS protocol data packet too long: %s"), s);
864 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
866 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
867 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
868 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
869 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
871 memcpy (packet + HDR_LENGTH, s, len);
873 cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len);
874 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
875 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
876 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
878 /* Increment the sequence number. This will set mips_send_seq to
879 the sequence number we expect in the acknowledgement. */
880 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
882 /* We can only have one outstanding data packet, so we just wait for
883 the acknowledgement here. Keep retransmitting the packet until
884 we get one, or until we've tried too many times. */
885 for (try = 0; try < mips_send_retries; try++)
890 if (remote_debug > 0)
892 /* Don't use _filtered; we can't deal with a QUIT out of
893 target_wait, and I think this might be called from there. */
894 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
895 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
898 if (serial_write (mips_desc, packet,
899 HDR_LENGTH + len + TRLR_LENGTH) != 0)
900 mips_error (_("write to target failed: %s"), safe_strerror (errno));
909 unsigned char hdr[HDR_LENGTH + 1];
910 unsigned char trlr[TRLR_LENGTH + 1];
914 /* Get the packet header. If we time out, resend the data
916 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
922 /* If we get a data packet, assume it is a duplicate and
923 ignore it. FIXME: If the acknowledgement is lost, this
924 data packet may be the packet the remote sends after the
926 if (HDR_IS_DATA (hdr))
930 /* Ignore any errors raised whilst attempting to ignore
933 len = HDR_GET_LEN (hdr);
935 for (i = 0; i < len; i++)
939 rch = mips_readchar (remote_timeout);
945 if (rch == SERIAL_TIMEOUT)
947 /* Ignore the character. */
951 (void) mips_receive_trailer (trlr, &garbage, &ch,
954 /* We don't bother checking the checksum, or providing an
955 ACK to the packet. */
959 /* If the length is not 0, this is a garbled packet. */
960 if (HDR_GET_LEN (hdr) != 0)
963 /* Get the packet trailer. */
964 err = mips_receive_trailer (trlr, &garbage, &ch,
965 mips_retransmit_wait);
967 /* If we timed out, resend the data packet. */
971 /* If we got a bad character, reread the header. */
975 /* If the checksum does not match the trailer checksum, this
976 is a bad packet; ignore it. */
977 if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr))
980 if (remote_debug > 0)
982 hdr[HDR_LENGTH] = '\0';
983 trlr[TRLR_LENGTH] = '\0';
984 /* Don't use _filtered; we can't deal with a QUIT out of
985 target_wait, and I think this might be called from there. */
986 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
987 HDR_GET_SEQ (hdr), hdr + 1, trlr);
990 /* If this ack is for the current packet, we're done. */
991 seq = HDR_GET_SEQ (hdr);
992 if (seq == mips_send_seq)
995 /* If this ack is for the last packet, resend the current
997 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1000 /* Otherwise this is a bad ack; ignore it. Increment the
1001 garbage count to ensure that we do not stay in this loop
1007 mips_error (_("Remote did not acknowledge packet"));
1010 /* Receive and acknowledge a packet, returning the data in BUFF (which
1011 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1012 implies that only the sender retransmits packets, so this code just
1013 waits silently for a packet. It returns the length of the received
1014 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1015 don't print an error message and return -1. */
1018 mips_receive_packet (char *buff, int throw_error, int timeout)
1023 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1030 unsigned char hdr[HDR_LENGTH];
1031 unsigned char trlr[TRLR_LENGTH];
1035 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1038 mips_error (_("Timed out waiting for remote packet"));
1045 /* An acknowledgement is probably a duplicate; ignore it. */
1046 if (!HDR_IS_DATA (hdr))
1048 len = HDR_GET_LEN (hdr);
1049 /* Check if the length is valid for an ACK, we may aswell
1050 try and read the remainder of the packet: */
1053 /* Ignore the error condition, since we are going to
1054 ignore the packet anyway. */
1055 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1057 /* Don't use _filtered; we can't deal with a QUIT out of
1058 target_wait, and I think this might be called from there. */
1059 if (remote_debug > 0)
1060 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1064 len = HDR_GET_LEN (hdr);
1065 for (i = 0; i < len; i++)
1069 rch = mips_readchar (timeout);
1075 if (rch == SERIAL_TIMEOUT)
1078 mips_error (_("Timed out waiting for remote packet"));
1087 /* Don't use _filtered; we can't deal with a QUIT out of
1088 target_wait, and I think this might be called from there. */
1089 if (remote_debug > 0)
1090 fprintf_unfiltered (gdb_stdlog,
1091 "Got new SYN after %d chars (wanted %d)\n",
1096 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1100 mips_error (_("Timed out waiting for packet"));
1106 /* Don't use _filtered; we can't deal with a QUIT out of
1107 target_wait, and I think this might be called from there. */
1108 if (remote_debug > 0)
1109 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1113 /* If this is the wrong sequence number, ignore it. */
1114 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1116 /* Don't use _filtered; we can't deal with a QUIT out of
1117 target_wait, and I think this might be called from there. */
1118 if (remote_debug > 0)
1119 fprintf_unfiltered (gdb_stdlog,
1120 "Ignoring sequence number %d (want %d)\n",
1121 HDR_GET_SEQ (hdr), mips_receive_seq);
1125 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1128 if (remote_debug > 0)
1129 /* Don't use _filtered; we can't deal with a QUIT out of
1130 target_wait, and I think this might be called from there. */
1131 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1132 mips_cksum (hdr, buff, len),
1133 TRLR_GET_CKSUM (trlr));
1135 /* The checksum failed. Send an acknowledgement for the
1136 previous packet to tell the remote to resend the packet. */
1137 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1138 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1139 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1140 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1142 cksum = mips_cksum (ack, NULL, 0);
1144 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1145 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1146 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1148 if (remote_debug > 0)
1150 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1151 /* Don't use _filtered; we can't deal with a QUIT out of
1152 target_wait, and I think this might be called from there. */
1153 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1157 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1160 mips_error (_("write to target failed: %s"),
1161 safe_strerror (errno));
1167 if (remote_debug > 0)
1170 /* Don't use _filtered; we can't deal with a QUIT out of
1171 target_wait, and I think this might be called from there. */
1172 printf_unfiltered ("Got packet \"%s\"\n", buff);
1175 /* We got the packet. Send an acknowledgement. */
1176 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1178 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1179 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1180 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1181 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1183 cksum = mips_cksum (ack, NULL, 0);
1185 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1186 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1187 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1189 if (remote_debug > 0)
1191 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1192 /* Don't use _filtered; we can't deal with a QUIT out of
1193 target_wait, and I think this might be called from there. */
1194 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1198 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1201 mips_error (_("write to target failed: %s"), safe_strerror (errno));
1209 /* Optionally send a request to the remote system and optionally wait
1210 for the reply. This implements the remote debugging protocol,
1211 which is built on top of the packet protocol defined above. Each
1212 request has an ADDR argument and a DATA argument. The following
1213 requests are defined:
1215 \0 don't send a request; just wait for a reply
1216 i read word from instruction space at ADDR
1217 d read word from data space at ADDR
1218 I write DATA to instruction space at ADDR
1219 D write DATA to data space at ADDR
1220 r read register number ADDR
1221 R set register number ADDR to value DATA
1222 c continue execution (if ADDR != 1, set pc to ADDR)
1223 s single step (if ADDR != 1, set pc to ADDR)
1225 The read requests return the value requested. The write requests
1226 return the previous value in the changed location. The execution
1227 requests return a UNIX wait value (the approximate signal which
1228 caused execution to stop is in the upper eight bits).
1230 If PERR is not NULL, this function waits for a reply. If an error
1231 occurs, it sets *PERR to 1 and sets errno according to what the
1232 target board reports. */
1235 mips_request (int cmd,
1242 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
1243 char myBuff[DATA_MAXLEN + 1];
1244 char response_string[17];
1251 if (buff == (char *) NULL)
1256 if (mips_need_reply)
1257 internal_error (__FILE__, __LINE__,
1258 _("mips_request: Trying to send "
1259 "command before reply"));
1260 /* 'T' sets a register to a 64-bit value, so make sure we use
1261 the right conversion function. */
1263 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1264 phex_nz (addr, addr_size), phex_nz (data, 8));
1266 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1267 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1269 mips_send_packet (buff, 1);
1270 mips_need_reply = 1;
1273 if (perr == (int *) NULL)
1276 if (!mips_need_reply)
1277 internal_error (__FILE__, __LINE__,
1278 _("mips_request: Trying to get reply before command"));
1280 mips_need_reply = 0;
1282 len = mips_receive_packet (buff, 1, timeout);
1285 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1286 &rpid, &rcmd, &rerrflg, response_string) != 4
1287 || !read_hex_value (response_string, &rresponse)
1288 || (cmd != '\0' && rcmd != cmd))
1289 mips_error (_("Bad response from remote board"));
1295 /* FIXME: This will returns MIPS errno numbers, which may or may
1296 not be the same as errno values used on other systems. If
1297 they stick to common errno values, they will be the same, but
1298 if they don't, they must be translated. */
1308 /* Cleanup associated with mips_initialize(). */
1311 mips_initialize_cleanups (void *arg)
1313 mips_initializing = 0;
1316 /* Cleanup associated with mips_exit_debug(). */
1319 mips_exit_cleanups (void *arg)
1324 /* Send a command and wait for that command to be echoed back. Wait,
1325 too, for the following prompt. */
1328 mips_send_command (const char *cmd, int prompt)
1330 serial_write (mips_desc, cmd, strlen (cmd));
1334 mips_expect (mips_monitor_prompt);
1337 /* Enter remote (dbx) debug mode: */
1340 mips_enter_debug (void)
1342 /* Reset the sequence numbers, ready for the new debug sequence: */
1344 mips_receive_seq = 0;
1346 if (mips_monitor != MON_IDT)
1347 mips_send_command ("debug\r", 0);
1348 else /* Assume IDT monitor by default. */
1349 mips_send_command ("db tty0\r", 0);
1351 gdb_usleep (1000000);
1352 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1354 /* We don't need to absorb any spurious characters here, since the
1355 mips_receive_header will eat up a reasonable number of characters
1356 whilst looking for the SYN, however this avoids the "garbage"
1357 being displayed to the user. */
1358 if (mips_monitor != MON_IDT)
1362 char buff[DATA_MAXLEN + 1];
1364 if (mips_receive_packet (buff, 1, 3) < 0)
1365 mips_error (_("Failed to initialize (didn't receive packet)."));
1369 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1372 mips_exit_debug (void)
1375 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1379 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1381 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1382 so we do not get a reply to this command: */
1383 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1384 mips_need_reply = 0;
1385 if (!mips_expect (" break!"))
1387 do_cleanups (old_cleanups);
1392 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1394 if (!mips_expect (mips_monitor_prompt))
1396 do_cleanups (old_cleanups);
1400 do_cleanups (old_cleanups);
1405 /* Initialize a new connection to the MIPS board, and make sure we are
1406 really connected. */
1409 mips_initialize (void)
1412 struct cleanup *old_cleanups;
1415 /* What is this code doing here? I don't see any way it can happen, and
1416 it might mean mips_initializing didn't get cleared properly.
1417 So I'll make it a warning. */
1419 if (mips_initializing)
1421 warning (_("internal error: mips_initialize called twice"));
1425 old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1428 mips_initializing = 1;
1430 /* At this point, the packit protocol isn't responding. We'll try getting
1431 into the monitor, and restarting the protocol. */
1433 /* Force the system into the monitor. After this we *should* be at
1434 the mips_monitor_prompt. */
1435 if (mips_monitor != MON_IDT)
1436 j = 0; /* Start by checking if we are already
1439 j = 1; /* Start by sending a break. */
1444 case 0: /* First, try sending a CR. */
1445 serial_flush_input (mips_desc);
1446 serial_write (mips_desc, "\r", 1);
1448 case 1: /* First, try sending a break. */
1449 serial_send_break (mips_desc);
1451 case 2: /* Then, try a ^C. */
1452 serial_write (mips_desc, "\003", 1);
1454 case 3: /* Then, try escaping from download. */
1456 if (mips_monitor != MON_IDT)
1460 /* We shouldn't need to send multiple termination
1461 sequences, since the target performs line (or
1462 block) reads, and then processes those
1463 packets. In-case we were downloading a large packet
1464 we flush the output buffer before inserting a
1465 termination sequence. */
1466 serial_flush_output (mips_desc);
1467 sprintf (tbuff, "\r/E/E\r");
1468 serial_write (mips_desc, tbuff, 6);
1475 /* We are possibly in binary download mode, having
1476 aborted in the middle of an S-record. ^C won't
1477 work because of binary mode. The only reliable way
1478 out is to send enough termination packets (8 bytes)
1479 to fill up and then overflow the largest size
1480 S-record (255 bytes in this case). This amounts to
1481 256/8 + 1 packets. */
1483 mips_make_srec (srec, '7', 0, NULL, 0);
1485 for (i = 1; i <= 33; i++)
1487 serial_write (mips_desc, srec, 8);
1489 if (serial_readchar (mips_desc, 0) >= 0)
1490 break; /* Break immediatly if we get something from
1497 mips_error (_("Failed to initialize."));
1500 if (mips_expect (mips_monitor_prompt))
1504 if (mips_monitor != MON_IDT)
1506 /* Sometimes PMON ignores the first few characters in the first
1507 command sent after a load. Sending a blank command gets
1509 mips_send_command ("\r", -1);
1511 /* Ensure the correct target state: */
1512 if (mips_monitor != MON_LSI)
1513 mips_send_command ("set regsize 64\r", -1);
1514 mips_send_command ("set hostport tty0\r", -1);
1515 mips_send_command ("set brkcmd \"\"\r", -1);
1516 /* Delete all the current breakpoints: */
1517 mips_send_command ("db *\r", -1);
1518 /* NOTE: PMON does not have breakpoint support through the
1519 "debug" mode, only at the monitor command-line. */
1522 mips_enter_debug ();
1524 /* Clear all breakpoints: */
1525 if ((mips_monitor == MON_IDT
1526 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1527 || mips_monitor == MON_LSI)
1528 monitor_supports_breakpoints = 1;
1530 monitor_supports_breakpoints = 0;
1532 do_cleanups (old_cleanups);
1534 /* If this doesn't call error, we have connected; we don't care if
1535 the request itself succeeds or fails. */
1537 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1540 /* Open a connection to the remote board. */
1543 common_open (struct target_ops *ops, char *name, int from_tty,
1544 enum mips_monitor_type new_monitor,
1545 const char *new_monitor_prompt)
1547 char *serial_port_name;
1548 char *remote_name = 0;
1549 char *local_name = 0;
1551 struct cleanup *cleanup;
1555 To open a MIPS remote debugging connection, you need to specify what\n\
1556 serial device is attached to the target board (e.g., /dev/ttya).\n\
1557 If you want to use TFTP to download to the board, specify the name of a\n\
1558 temporary file to be used by GDB for downloads as the second argument.\n\
1559 This filename must be in the form host:filename, where host is the name\n\
1560 of the host running the TFTP server, and the file must be readable by the\n\
1561 world. If the local name of the temporary file differs from the name as\n\
1562 seen from the board via TFTP, specify that name as the third parameter.\n"));
1564 /* Parse the serial port name, the optional TFTP name, and the
1565 optional local TFTP name. */
1566 argv = gdb_buildargv (name);
1567 cleanup = make_cleanup_freeargv (argv);
1569 serial_port_name = xstrdup (argv[0]);
1570 if (argv[1]) /* Remote TFTP name specified? */
1572 remote_name = argv[1];
1573 if (argv[2]) /* Local TFTP filename specified? */
1574 local_name = argv[2];
1577 target_preopen (from_tty);
1580 unpush_target (current_ops);
1582 /* Open and initialize the serial port. */
1583 mips_desc = serial_open (serial_port_name);
1584 if (mips_desc == NULL)
1585 perror_with_name (serial_port_name);
1587 if (baud_rate != -1)
1589 if (serial_setbaudrate (mips_desc, baud_rate))
1591 serial_close (mips_desc);
1592 perror_with_name (serial_port_name);
1596 serial_raw (mips_desc);
1598 /* Open and initialize the optional download port. If it is in the form
1599 hostname#portnumber, it's a UDP socket. If it is in the form
1600 hostname:filename, assume it's the TFTP filename that must be
1601 passed to the DDB board to tell it where to get the load file. */
1604 if (strchr (remote_name, '#'))
1606 udp_desc = serial_open (remote_name);
1608 perror_with_name (_("Unable to open UDP port"));
1613 /* Save the remote and local names of the TFTP temp file. If
1614 the user didn't specify a local name, assume it's the same
1615 as the part of the remote name after the "host:". */
1619 xfree (tftp_localname);
1620 if (local_name == NULL)
1621 if ((local_name = strchr (remote_name, ':')) != NULL)
1622 local_name++; /* Skip over the colon. */
1623 if (local_name == NULL)
1624 local_name = remote_name; /* Local name same as remote name. */
1625 tftp_name = xstrdup (remote_name);
1626 tftp_localname = xstrdup (local_name);
1634 /* Reset the expected monitor prompt if it's never been set before. */
1635 if (mips_monitor_prompt == NULL)
1636 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1637 mips_monitor = new_monitor;
1642 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1644 /* Switch to using remote target now. */
1647 inferior_ptid = remote_mips_ptid;
1648 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1649 add_thread_silent (inferior_ptid);
1651 /* Try to figure out the processor model if possible. */
1652 deprecated_mips_set_processor_regs_hack ();
1654 /* This is really the job of start_remote however, that makes an
1655 assumption that the target is about to print out a status message
1656 of some sort. That doesn't happen here (in fact, it may not be
1657 possible to get the monitor to send the appropriate packet). */
1659 reinit_frame_cache ();
1660 registers_changed ();
1661 stop_pc = regcache_read_pc (get_current_regcache ());
1662 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
1663 xfree (serial_port_name);
1665 do_cleanups (cleanup);
1668 /* Open a connection to an IDT board. */
1671 mips_open (char *name, int from_tty)
1673 const char *monitor_prompt = NULL;
1674 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1675 && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips)
1677 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach)
1679 case bfd_mach_mips4100:
1680 case bfd_mach_mips4300:
1681 case bfd_mach_mips4600:
1682 case bfd_mach_mips4650:
1683 case bfd_mach_mips5000:
1684 monitor_prompt = "<RISQ> ";
1688 if (monitor_prompt == NULL)
1689 monitor_prompt = "<IDT>";
1690 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1693 /* Open a connection to a PMON board. */
1696 pmon_open (char *name, int from_tty)
1698 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1701 /* Open a connection to a DDB board. */
1704 ddb_open (char *name, int from_tty)
1706 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1709 /* Open a connection to a rockhopper board. */
1712 rockhopper_open (char *name, int from_tty)
1714 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1717 /* Open a connection to an LSI board. */
1720 lsi_open (char *name, int from_tty)
1724 /* Clear the LSI breakpoint table. */
1725 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1726 lsi_breakpoints[i].type = BREAK_UNUSED;
1728 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1731 /* Close a connection to the remote board. */
1738 /* Get the board out of remote debugging mode. */
1739 (void) mips_exit_debug ();
1744 generic_mourn_inferior ();
1747 /* Detach from the remote board. */
1750 mips_detach (struct target_ops *ops, const char *args, int from_tty)
1753 error (_("Argument given to \"detach\" when remotely debugging."));
1755 unpush_target (ops);
1758 printf_unfiltered ("Ending remote MIPS debugging.\n");
1761 /* Tell the target board to resume. This does not wait for a reply
1762 from the board, except in the case of single-stepping on LSI boards,
1763 where PMON does return a reply. */
1766 mips_resume (struct target_ops *ops,
1767 ptid_t ptid, int step, enum gdb_signal siggnal)
1771 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1772 a single step, so we wait for that. */
1773 mips_request (step ? 's' : 'c', 1, siggnal,
1774 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1775 mips_receive_wait, NULL);
1778 /* Return the signal corresponding to SIG, where SIG is the number which
1779 the MIPS protocol uses for the signal. */
1781 static enum gdb_signal
1782 mips_signal_from_protocol (int sig)
1784 /* We allow a few more signals than the IDT board actually returns, on
1785 the theory that there is at least *some* hope that perhaps the numbering
1786 for these signals is widely agreed upon. */
1789 return GDB_SIGNAL_UNKNOWN;
1791 /* Don't want to use gdb_signal_from_host because we are converting
1792 from MIPS signal numbers, not host ones. Our internal numbers
1793 match the MIPS numbers for the signals the board can return, which
1794 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1795 return (enum gdb_signal) sig;
1798 /* Set the register designated by REGNO to the value designated by VALUE. */
1801 mips_set_register (int regno, ULONGEST value)
1803 gdb_byte buf[MAX_REGISTER_SIZE];
1804 struct regcache *regcache = get_current_regcache ();
1805 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1806 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1808 /* We got the number the register holds, but gdb expects to see a
1809 value in the target byte ordering. */
1811 if (mips_monitor != MON_ROCKHOPPER
1812 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1813 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1814 In such cases we can only really debug 32-bit code properly so,
1815 when reading a GPR or the PC, assume that the full 64-bit
1816 value is the sign extension of the lower 32 bits. */
1817 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1820 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1823 regcache_raw_supply (regcache, regno, buf);
1826 /* Wait until the remote stops, and return a wait status. */
1829 mips_wait (struct target_ops *ops,
1830 ptid_t ptid, struct target_waitstatus *status, int options)
1834 char buff[DATA_MAXLEN];
1835 ULONGEST rpc, rfp, rsp;
1836 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1839 interrupt_count = 0;
1842 /* If we have not sent a single step or continue command, then the
1843 board is waiting for us to do something. Return a status
1844 indicating that it is stopped. */
1845 if (!mips_need_reply)
1847 status->kind = TARGET_WAITKIND_STOPPED;
1848 status->value.sig = GDB_SIGNAL_TRAP;
1849 return inferior_ptid;
1852 /* No timeout; we sit here as long as the program continues to execute. */
1854 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1857 mips_error (_("Remote failure: %s"), safe_strerror (errno));
1859 /* On returning from a continue, the PMON monitor seems to start
1860 echoing back the messages we send prior to sending back the
1861 ACK. The code can cope with this, but to try and avoid the
1862 unnecessary serial traffic, and "spurious" characters displayed
1863 to the user, we cheat and reset the debug protocol. The problems
1864 seems to be caused by a check on the number of arguments, and the
1865 command length, within the monitor causing it to echo the command
1867 if (mips_monitor == MON_PMON)
1870 mips_enter_debug ();
1873 /* See if we got back extended status. If so, pick out the pc, fp,
1876 nfields = sscanf (buff,
1877 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1878 pc_string, fp_string, sp_string, flags);
1880 && read_hex_value (pc_string, &rpc)
1881 && read_hex_value (fp_string, &rfp)
1882 && read_hex_value (sp_string, &rsp))
1884 struct regcache *regcache = get_current_regcache ();
1885 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1887 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1888 mips_set_register (30, rfp);
1889 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1895 for (i = 0; i <= 2; i++)
1896 if (flags[i] == 'r' || flags[i] == 'w')
1898 else if (flags[i] == '\000')
1903 if (strcmp (target_shortname, "lsi") == 0)
1906 /* If this is an LSI PMON target, see if we just hit a
1907 hardrdware watchpoint. Right now, PMON doesn't give us
1908 enough information to determine which breakpoint we hit. So
1909 we have to look up the PC in our own table of breakpoints,
1910 and if found, assume it's just a normal instruction fetch
1911 breakpoint, not a data watchpoint. FIXME when PMON provides
1912 some way to tell us what type of breakpoint it is. */
1914 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1917 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1919 if (lsi_breakpoints[i].addr == pc
1920 && lsi_breakpoints[i].type == BREAK_FETCH)
1927 /* If a data breakpoint was hit, PMON returns the following packet:
1929 The return packet from an ordinary breakpoint doesn't have the
1930 extra 0x01 field tacked onto the end. */
1931 if (nfields == 1 && rpc == 1)
1936 /* NOTE: The following (sig) numbers are defined by PMON:
1937 SPP_SIGTRAP 5 breakpoint
1945 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1946 and so on, because the constants we want here are determined by the
1947 MIPS protocol and have nothing to do with what host we are running on. */
1948 if ((rstatus & 0xff) == 0)
1950 status->kind = TARGET_WAITKIND_EXITED;
1951 status->value.integer = (((rstatus) >> 8) & 0xff);
1953 else if ((rstatus & 0xff) == 0x7f)
1955 status->kind = TARGET_WAITKIND_STOPPED;
1956 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1958 /* If the stop PC is in the _exit function, assume
1959 we hit the 'break 0x3ff' instruction in _exit, so this
1960 is not a normal breakpoint. */
1961 if (strcmp (target_shortname, "lsi") == 0)
1963 const char *func_name;
1964 CORE_ADDR func_start;
1965 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1967 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1968 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1969 && func_start == pc)
1970 status->kind = TARGET_WAITKIND_EXITED;
1975 status->kind = TARGET_WAITKIND_SIGNALLED;
1976 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1979 return inferior_ptid;
1982 /* We have to map between the register numbers used by gdb and the
1983 register numbers used by the debugging protocol. */
1985 #define REGNO_OFFSET 96
1988 mips_map_regno (struct gdbarch *gdbarch, int regno)
1992 if (regno >= mips_regnum (gdbarch)->fp0
1993 && regno < mips_regnum (gdbarch)->fp0 + 32)
1994 return regno - mips_regnum (gdbarch)->fp0 + 32;
1995 else if (regno == mips_regnum (gdbarch)->pc)
1996 return REGNO_OFFSET + 0;
1997 else if (regno == mips_regnum (gdbarch)->cause)
1998 return REGNO_OFFSET + 1;
1999 else if (regno == mips_regnum (gdbarch)->hi)
2000 return REGNO_OFFSET + 2;
2001 else if (regno == mips_regnum (gdbarch)->lo)
2002 return REGNO_OFFSET + 3;
2003 else if (regno == mips_regnum (gdbarch)->fp_control_status)
2004 return REGNO_OFFSET + 4;
2005 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
2006 return REGNO_OFFSET + 5;
2008 /* FIXME: Is there a way to get the status register? */
2012 /* Fetch the remote registers. */
2015 mips_fetch_registers (struct target_ops *ops,
2016 struct regcache *regcache, int regno)
2018 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2019 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2025 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2026 mips_fetch_registers (ops, regcache, regno);
2030 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2031 || regno == MIPS_ZERO_REGNUM)
2032 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2033 supposed to read zero (see also mips-nat.c). */
2037 /* If PMON doesn't support this register, don't waste serial
2038 bandwidth trying to read it. */
2039 int pmon_reg = mips_map_regno (gdbarch, regno);
2041 if (regno != 0 && pmon_reg == 0)
2045 /* Unfortunately the PMON version in the Vr4300 board has been
2046 compiled without the 64bit register access commands. This
2047 means we cannot get hold of the full register width. */
2048 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2049 val = mips_request ('t', pmon_reg, 0,
2050 &err, mips_receive_wait, NULL);
2052 val = mips_request ('r', pmon_reg, 0,
2053 &err, mips_receive_wait, NULL);
2055 mips_error (_("Can't read register %d: %s"), regno,
2056 safe_strerror (errno));
2060 mips_set_register (regno, val);
2063 /* Prepare to store registers. The MIPS protocol can store individual
2064 registers, so this function doesn't have to do anything. */
2067 mips_prepare_to_store (struct regcache *regcache)
2071 /* Store remote register(s). */
2074 mips_store_registers (struct target_ops *ops,
2075 struct regcache *regcache, int regno)
2077 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2083 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2084 mips_store_registers (ops, regcache, regno);
2088 regcache_cooked_read_unsigned (regcache, regno, &val);
2089 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2090 mips_map_regno (gdbarch, regno),
2092 &err, mips_receive_wait, NULL);
2094 mips_error (_("Can't write register %d: %s"), regno,
2095 safe_strerror (errno));
2098 /* Fetch a word from the target board. Return word fetched in location
2099 addressed by VALP. Return 0 when successful; return positive error
2103 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2107 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2110 /* Data space failed; try instruction space. */
2111 *valp = mips_request ('i', addr, 0, &err,
2112 mips_receive_wait, NULL);
2117 /* Store a word to the target board. Returns errno code or zero for
2118 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2119 memory location there. */
2121 /* FIXME! make sure only 32-bit quantities get stored! */
2123 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2126 unsigned int oldcontents;
2128 oldcontents = mips_request ('D', addr, val, &err,
2129 mips_receive_wait, NULL);
2132 /* Data space failed; try instruction space. */
2133 oldcontents = mips_request ('I', addr, val, &err,
2134 mips_receive_wait, NULL);
2138 if (old_contents != NULL)
2139 *old_contents = oldcontents;
2143 /* Read or write LEN bytes from inferior memory at MEMADDR,
2144 transferring to or from debugger address MYADDR. Write to inferior
2145 if SHOULD_WRITE is nonzero. Returns length of data written or
2146 read; 0 for error. Note that protocol gives us the correct value
2147 for a longword, since it transfers values in ASCII. We want the
2148 byte values, so we have to swap the longword values. */
2150 static int mask_address_p = 1;
2153 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2154 struct mem_attrib *attrib, struct target_ops *target)
2156 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
2163 /* PMON targets do not cope well with 64 bit addresses. Mask the
2164 value down to 32 bits. */
2166 memaddr &= (CORE_ADDR) 0xffffffff;
2168 /* Round starting address down to longword boundary. */
2169 addr = memaddr & ~3;
2170 /* Round ending address up; get number of longwords that makes. */
2171 count = (((memaddr + len) - addr) + 3) / 4;
2172 /* Allocate buffer of that many longwords. */
2173 buffer = alloca (count * 4);
2177 /* Fill start and end extra bytes of buffer with existing data. */
2178 if (addr != memaddr || len < 4)
2182 if (mips_fetch_word (addr, &val))
2185 /* Need part of initial word -- fetch it. */
2186 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2193 /* Need part of last word -- fetch it. FIXME: we do this even
2194 if we don't need it. */
2195 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2198 store_unsigned_integer (&buffer[(count - 1) * 4],
2199 4, byte_order, val);
2202 /* Copy data to be written over corresponding part of buffer. */
2204 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2206 /* Write the entire buffer. */
2208 for (i = 0; i < count; i++, addr += 4)
2212 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2213 status = mips_store_word (addr, word, NULL);
2214 /* Report each kilobyte (we download 32-bit words at a time). */
2217 printf_unfiltered ("*");
2218 gdb_flush (gdb_stdout);
2225 /* FIXME: Do we want a QUIT here? */
2228 printf_unfiltered ("\n");
2232 /* Read all the longwords. */
2233 for (i = 0; i < count; i++, addr += 4)
2237 if (mips_fetch_word (addr, &val))
2240 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2244 /* Copy appropriate bytes out of the buffer. */
2245 memcpy (myaddr, buffer + (memaddr & 3), len);
2250 /* Print info on this target. */
2253 mips_files_info (struct target_ops *ignore)
2255 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2258 /* Kill the process running on the board. This will actually only
2259 work if we are doing remote debugging over the console input. I
2260 think that if IDT/sim had the remote debug interrupt enabled on the
2261 right port, we could interrupt the process with a break signal. */
2264 mips_kill (struct target_ops *ops)
2266 if (!mips_wait_flag)
2268 target_mourn_inferior ();
2274 if (interrupt_count >= 2)
2276 interrupt_count = 0;
2278 target_terminal_ours ();
2280 if (query (_("Interrupted while waiting for the program.\n\
2281 Give up (and stop debugging it)? ")))
2283 /* Clean up in such a way that mips_close won't try to talk
2284 to the board (it almost surely won't work since we
2285 weren't able to talk to it). */
2289 printf_unfiltered ("Ending remote MIPS debugging.\n");
2290 target_mourn_inferior ();
2294 target_terminal_inferior ();
2297 if (remote_debug > 0)
2298 printf_unfiltered ("Sending break\n");
2300 serial_send_break (mips_desc);
2302 target_mourn_inferior ();
2311 serial_write (mips_desc, &cc, 1);
2313 target_mourn_inferior ();
2318 /* Start running on the target board. */
2321 mips_create_inferior (struct target_ops *ops, char *execfile,
2322 char *args, char **env, int from_tty)
2329 Can't pass arguments to remote MIPS board; arguments ignored."));
2330 /* And don't try to use them on the next "run" command. */
2331 execute_command ("set args", 0);
2334 if (execfile == 0 || exec_bfd == 0)
2335 error (_("No executable file specified"));
2337 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2339 init_wait_for_inferior ();
2341 regcache_write_pc (get_current_regcache (), entry_pt);
2344 /* Clean up after a process. The bulk of the work is done in mips_close(),
2345 which is called when unpushing the target. */
2348 mips_mourn_inferior (struct target_ops *ops)
2350 if (current_ops != NULL)
2351 unpush_target (current_ops);
2354 /* We can write a breakpoint and read the shadow contents in one
2357 /* Insert a breakpoint. On targets that don't have built-in
2358 breakpoint support, we read the contents of the target location and
2359 stash it, then overwrite it with a breakpoint instruction. ADDR is
2360 the target location in the target machine. BPT is the breakpoint
2361 being inserted or removed, which contains memory for saving the
2365 mips_insert_breakpoint (struct gdbarch *gdbarch,
2366 struct bp_target_info *bp_tgt)
2368 if (monitor_supports_breakpoints)
2369 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2372 return memory_insert_breakpoint (gdbarch, bp_tgt);
2375 /* Remove a breakpoint. */
2378 mips_remove_breakpoint (struct gdbarch *gdbarch,
2379 struct bp_target_info *bp_tgt)
2381 if (monitor_supports_breakpoints)
2382 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2385 return memory_remove_breakpoint (gdbarch, bp_tgt);
2388 /* Tell whether this target can support a hardware breakpoint. CNT
2389 is the number of hardware breakpoints already installed. This
2390 implements the target_can_use_hardware_watchpoint macro. */
2393 mips_can_use_watchpoint (int type, int cnt, int othertype)
2395 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2399 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2400 This is used for memory ref breakpoints. */
2402 static unsigned long
2403 calculate_mask (CORE_ADDR addr, int len)
2408 mask = addr ^ (addr + len - 1);
2410 for (i = 32; i >= 0; i--)
2416 mask = (unsigned long) 0xffffffff >> i;
2422 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2423 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2427 mips_insert_watchpoint (CORE_ADDR addr, int len, int type,
2428 struct expression *cond)
2430 if (mips_set_breakpoint (addr, len, type))
2436 /* Remove a watchpoint. */
2439 mips_remove_watchpoint (CORE_ADDR addr, int len, int type,
2440 struct expression *cond)
2442 if (mips_clear_breakpoint (addr, len, type))
2448 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2452 mips_stopped_by_watchpoint (void)
2454 return hit_watchpoint;
2458 /* Insert a breakpoint. */
2461 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2463 return mips_common_breakpoint (1, addr, len, type);
2467 /* Clear a breakpoint. */
2470 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2472 return mips_common_breakpoint (0, addr, len, type);
2476 /* Check the error code from the return packet for an LSI breakpoint
2477 command. If there's no error, just return 0. If it's a warning,
2478 print the warning text and return 0. If it's an error, print
2479 the error text and return 1. <ADDR> is the address of the breakpoint
2480 that was being set. <RERRFLG> is the error code returned by PMON.
2481 This is a helper function for mips_common_breakpoint. */
2484 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2486 struct lsi_error *err;
2487 const char *saddr = paddress (target_gdbarch (), addr);
2489 if (rerrflg == 0) /* no error */
2492 /* Warnings can be ORed together, so check them all. */
2493 if (rerrflg & W_WARN)
2495 if (monitor_warnings)
2499 for (err = lsi_warning_table; err->code != 0; err++)
2501 if ((err->code & rerrflg) == err->code)
2504 fprintf_unfiltered (gdb_stderr, "\
2505 mips_common_breakpoint (%s): Warning: %s\n",
2511 fprintf_unfiltered (gdb_stderr, "\
2512 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2519 /* Errors are unique, i.e. can't be ORed together. */
2520 for (err = lsi_error_table; err->code != 0; err++)
2522 if ((err->code & rerrflg) == err->code)
2524 fprintf_unfiltered (gdb_stderr, "\
2525 mips_common_breakpoint (%s): Error: %s\n",
2531 fprintf_unfiltered (gdb_stderr, "\
2532 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2539 /* This routine sends a breakpoint command to the remote target.
2541 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2542 <ADDR> is the address of the breakpoint.
2543 <LEN> the length of the region to break on.
2544 <TYPE> is the type of breakpoint:
2545 0 = write (BREAK_WRITE)
2546 1 = read (BREAK_READ)
2547 2 = read/write (BREAK_ACCESS)
2548 3 = instruction fetch (BREAK_FETCH)
2550 Return 0 if successful; otherwise 1. */
2553 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2555 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
2556 char buf[DATA_MAXLEN + 1];
2558 int rpid, rerrflg, rresponse, rlen;
2561 addr = gdbarch_addr_bits_remove (target_gdbarch (), addr);
2563 if (mips_monitor == MON_LSI)
2565 if (set == 0) /* clear breakpoint */
2567 /* The LSI PMON "clear breakpoint" has this form:
2568 <pid> 'b' <bptn> 0x0
2570 <pid> 'b' 0x0 <code>
2572 <bptn> is a breakpoint number returned by an earlier 'B' command.
2573 Possible return codes: OK, E_BPT. */
2577 /* Search for the breakpoint in the table. */
2578 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2579 if (lsi_breakpoints[i].type == type
2580 && lsi_breakpoints[i].addr == addr
2581 && lsi_breakpoints[i].len == len)
2584 /* Clear the table entry and tell PMON to clear the breakpoint. */
2585 if (i == MAX_LSI_BREAKPOINTS)
2588 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2589 paddress (target_gdbarch (), addr));
2593 lsi_breakpoints[i].type = BREAK_UNUSED;
2594 sprintf (buf, "0x0 b 0x%x 0x0", i);
2595 mips_send_packet (buf, 1);
2597 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2600 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2602 mips_error (_("mips_common_breakpoint: "
2603 "Bad response from remote board: %s"),
2606 return (mips_check_lsi_error (addr, rerrflg));
2609 /* set a breakpoint */
2611 /* The LSI PMON "set breakpoint" command has this form:
2612 <pid> 'B' <addr> 0x0
2614 <pid> 'B' <bptn> <code>
2616 The "set data breakpoint" command has this form:
2618 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2620 where: type= "0x1" = read
2622 "0x3" = access (read or write)
2624 The reply returns two values:
2625 bptn - a breakpoint number, which is a small integer with
2626 possible values of zero through 255.
2627 code - an error return code, a value of zero indicates a
2628 succesful completion, other values indicate various
2629 errors and warnings.
2631 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2633 if (type == BREAK_FETCH) /* instruction breakpoint */
2636 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2642 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2643 phex_nz (addr, addr_size),
2644 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2645 phex_nz (addr + len - 1, addr_size));
2647 mips_send_packet (buf, 1);
2649 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2652 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2653 &rpid, &rcmd, &rresponse, &rerrflg);
2654 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2655 mips_error (_("mips_common_breakpoint: "
2656 "Bad response from remote board: %s"),
2660 if (mips_check_lsi_error (addr, rerrflg))
2663 /* rresponse contains PMON's breakpoint number. Record the
2664 information for this breakpoint so we can clear it later. */
2665 lsi_breakpoints[rresponse].type = type;
2666 lsi_breakpoints[rresponse].addr = addr;
2667 lsi_breakpoints[rresponse].len = len;
2674 /* On non-LSI targets, the breakpoint command has this form:
2675 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2676 <MASK> is a don't care mask for addresses.
2677 <FLAGS> is any combination of `r', `w', or `f' for
2678 read/write/fetch. */
2682 mask = calculate_mask (addr, len);
2685 if (set) /* set a breakpoint */
2691 case BREAK_WRITE: /* write */
2694 case BREAK_READ: /* read */
2697 case BREAK_ACCESS: /* read/write */
2700 case BREAK_FETCH: /* fetch */
2704 internal_error (__FILE__, __LINE__,
2705 _("failed internal consistency check"));
2709 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2710 phex_nz (mask, addr_size), flags);
2715 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2718 mips_send_packet (buf, 1);
2720 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2723 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2724 &rpid, &rcmd, &rerrflg, &rresponse);
2726 if (nfields != 4 || rcmd != cmd)
2727 mips_error (_("mips_common_breakpoint: "
2728 "Bad response from remote board: %s"),
2733 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2734 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2735 if (mips_monitor == MON_DDB)
2736 rresponse = rerrflg;
2737 if (rresponse != 22) /* invalid argument */
2738 fprintf_unfiltered (gdb_stderr, "\
2739 mips_common_breakpoint (%s): Got error: 0x%x\n",
2740 paddress (target_gdbarch (), addr), rresponse);
2747 /* Send one S record as specified by SREC of length LEN, starting
2748 at ADDR. Note, however, that ADDR is not used except to provide
2749 a useful message to the user in the event that a NACK is received
2753 send_srec (char *srec, int len, CORE_ADDR addr)
2759 serial_write (mips_desc, srec, len);
2761 ch = mips_readchar (remote_timeout);
2765 case SERIAL_TIMEOUT:
2766 error (_("Timeout during download."));
2770 case 0x15: /* NACK */
2771 fprintf_unfiltered (gdb_stderr,
2772 "Download got a NACK at byte %s! Retrying.\n",
2773 paddress (target_gdbarch (), addr));
2776 error (_("Download got unexpected ack char: 0x%x, retrying."),
2782 /* Download a binary file by converting it to S records. */
2785 mips_load_srec (char *args)
2792 unsigned int srec_frame = 200;
2794 struct cleanup *cleanup;
2795 static int hashmark = 1;
2797 buffer = alloca (srec_frame * 2 + 256);
2799 abfd = gdb_bfd_open (args, NULL, -1);
2802 printf_filtered ("Unable to open file %s\n", args);
2806 cleanup = make_cleanup_bfd_unref (abfd);
2807 if (bfd_check_format (abfd, bfd_object) == 0)
2809 printf_filtered ("File is not an object file\n");
2810 do_cleanups (cleanup);
2814 /* This actually causes a download in the IDT binary format: */
2815 mips_send_command (LOAD_CMD, 0);
2817 for (s = abfd->sections; s; s = s->next)
2819 if (s->flags & SEC_LOAD)
2821 unsigned int numbytes;
2823 /* FIXME! vma too small????? */
2824 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2826 (long) (s->vma + bfd_get_section_size (s)));
2827 gdb_flush (gdb_stdout);
2829 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2831 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2833 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2835 reclen = mips_make_srec (srec, '3', s->vma + i,
2837 send_srec (srec, reclen, s->vma + i);
2839 if (deprecated_ui_load_progress_hook)
2840 deprecated_ui_load_progress_hook (s->name, i);
2844 putchar_unfiltered ('#');
2845 gdb_flush (gdb_stdout);
2848 } /* Per-packet (or S-record) loop */
2850 putchar_unfiltered ('\n');
2851 } /* Loadable sections */
2854 putchar_unfiltered ('\n');
2856 /* Write a type 7 terminator record. no data for a type 7, and there
2857 is no data, so len is 0. */
2859 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2861 send_srec (srec, reclen, abfd->start_address);
2863 serial_flush_input (mips_desc);
2864 do_cleanups (cleanup);
2868 * mips_make_srec -- make an srecord. This writes each line, one at a
2869 * time, each with it's own header and trailer line.
2870 * An srecord looks like this:
2872 * byte count-+ address
2873 * start ---+ | | data +- checksum
2875 * S01000006F6B692D746573742E73726563E4
2876 * S315000448600000000000000000FC00005900000000E9
2877 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2878 * S30B0004485A0000000000004E
2881 * S<type><length><address><data><checksum>
2885 * is the number of bytes following upto the checksum. Note that
2886 * this is not the number of chars following, since it takes two
2887 * chars to represent a byte.
2891 * 1) two byte address data record
2892 * 2) three byte address data record
2893 * 3) four byte address data record
2894 * 7) four byte address termination record
2895 * 8) three byte address termination record
2896 * 9) two byte address termination record
2899 * is the start address of the data following, or in the case of
2900 * a termination record, the start address of the image
2904 * is the sum of all the raw byte data in the record, from the length
2905 * upwards, modulo 256 and subtracted from 255.
2907 * This routine returns the length of the S-record.
2912 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2915 unsigned char checksum;
2918 /* Create the header for the srec. addr_size is the number of bytes
2919 in the address, and 1 is the number of bytes in the count. */
2921 /* FIXME!! bigger buf required for 64-bit! */
2924 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2925 /* This assumes S3 style downloads (4byte addresses). There should
2926 probably be a check, or the code changed to make it more
2928 buf[3] = memaddr >> 24;
2929 buf[4] = memaddr >> 16;
2930 buf[5] = memaddr >> 8;
2932 memcpy (&buf[7], myaddr, len);
2934 /* Note that the checksum is calculated on the raw data, not the
2935 hexified data. It includes the length, address and the data
2936 portions of the packet. */
2938 buf += 2; /* Point at length byte. */
2939 for (i = 0; i < len + 4 + 1; i++)
2947 /* The following manifest controls whether we enable the simple flow
2948 control support provided by the monitor. If enabled the code will
2949 wait for an affirmative ACK between transmitting packets. */
2950 #define DOETXACK (1)
2952 /* The PMON fast-download uses an encoded packet format constructed of
2953 3byte data packets (encoded as 4 printable ASCII characters), and
2954 escape sequences (preceded by a '/'):
2957 'C' compare checksum (12bit value, not included in checksum calculation)
2958 'S' define symbol name (for addr) terminated with ","
2959 and padded to 4char boundary
2960 'Z' zero fill multiple of 3bytes
2961 'B' byte (12bit encoded value, of 8bit data)
2962 'A' address (36bit encoded value)
2963 'E' define entry as original address, and exit load
2965 The packets are processed in 4 character chunks, so the escape
2966 sequences that do not have any data (or variable length data)
2967 should be padded to a 4 character boundary. The decoder will give
2968 an error if the complete message block size is not a multiple of
2969 4bytes (size of record).
2971 The encoding of numbers is done in 6bit fields. The 6bit value is
2972 used to index into this string to get the specific character
2973 encoding for the value: */
2974 static char encoding[] =
2975 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2977 /* Convert the number of bits required into an encoded number, 6bits
2978 at a time (range 0..63). Keep a checksum if required (passed
2979 pointer non-NULL). The function returns the number of encoded
2980 characters written into the buffer. */
2983 pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum)
2985 int count = (n / 6);
2989 fprintf_unfiltered (gdb_stderr,
2990 "Fast encoding bitcount must be a "
2991 "multiple of 12bits: %dbit%s\n",
2992 n, (n == 1) ? "" : "s");
2997 fprintf_unfiltered (gdb_stderr,
2998 "Fast encoding cannot process more "
2999 "than 36bits at the moment: %dbits\n", n);
3003 /* Deal with the checksum: */
3009 *chksum += ((v >> 24) & 0xFFF);
3011 *chksum += ((v >> 12) & 0xFFF);
3013 *chksum += ((v >> 0) & 0xFFF);
3020 *p++ = encoding[(v >> n) & 0x3F];
3027 /* Shorthand function (that could be in-lined) to output the zero-fill
3028 escape sequence into the data stream. */
3031 pmon_zeroset (int recsize, char **buff,
3032 unsigned int *amount, unsigned int *chksum)
3036 sprintf (*buff, "/Z");
3037 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3038 *buff += (count + 2);
3040 return (recsize + count + 2);
3043 /* Add the checksum specified by *VALUE to end of the record under
3044 construction. *BUF specifies the location at which to begin
3045 writing characters comprising the checksum information. RECSIZE
3046 specifies the size of the record constructed thus far. (A trailing
3047 NUL character may be present in the buffer holding the record, but
3048 the record size does not include this character.)
3050 Return the total size of the record after adding the checksum escape,
3051 the checksum itself, and the trailing newline.
3053 The checksum specified by *VALUE is zeroed out prior to returning.
3054 Additionally, *BUF is updated to refer to the location just beyond
3055 the record elements added by this call. */
3058 pmon_checkset (int recsize, char **buff, unsigned int *value)
3062 /* Add the checksum (without updating the value): */
3063 sprintf (*buff, "/C");
3064 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3065 *buff += (count + 2);
3066 sprintf (*buff, "\n");
3067 *buff += 2; /* Include zero terminator. */
3068 /* Forcing a checksum validation clears the sum: */
3070 return (recsize + count + 3);
3073 /* Amount of padding we leave after at the end of the output buffer,
3074 for the checksum and line termination characters: */
3075 #define CHECKSIZE (4 + 4 + 4 + 2)
3076 /* zero-fill, checksum, transfer end and line termination space. */
3078 /* The amount of binary data loaded from the object file in a single
3080 #define BINCHUNK (1024)
3082 /* Maximum line of data accepted by the monitor: */
3083 #define MAXRECSIZE (550)
3084 /* NOTE: This constant depends on the monitor being used. This value
3085 is for PMON 5.x on the Cogent Vr4300 board. */
3087 /* Create a FastLoad format record.
3089 *OUTBUF is the buffer into which a FastLoad formatted record is
3090 written. On return, the pointer position represented by *OUTBUF
3091 is updated to point at the end of the data, i.e. the next position
3092 in the buffer that may be written. No attempt is made to NUL-
3093 terminate this portion of the record written to the buffer.
3095 INBUF contains the binary input data from which the FastLoad
3096 formatted record will be built. *INPTR is an index into this
3097 buffer. *INPTR is updated as the input is consumed. Thus, on
3098 return, the caller has access to the position of the next input
3099 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3102 *RECSIZE will be written with the size of the record written to the
3103 output buffer prior to returning. This size does not include a
3104 NUL-termination byte as none is written to the output buffer.
3106 *CSUM is the output buffer checksum. It is updated as data is
3107 written to the output buffer.
3109 *ZEROFILL is the current number of 3-byte zero sequences that have
3110 been encountered. It is both an input and an output to this
3114 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3115 int inamount, int *recsize, unsigned int *csum,
3116 unsigned int *zerofill)
3121 /* This is a simple check to ensure that our data will fit within
3122 the maximum allowable record size. Each record output is 4bytes
3123 in length. We must allow space for a pending zero fill command,
3124 the record, and a checksum record. */
3125 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3127 /* Process the binary data: */
3128 if ((inamount - *inptr) < 3)
3131 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3133 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3135 *recsize += (2 + count);
3140 unsigned int value = ((inbuf[*inptr + 0] << 16)
3141 | (inbuf[*inptr + 1] << 8)
3142 | (inbuf[*inptr + 2]));
3144 /* Simple check for zero data. TODO: A better check would be
3145 to check the last, and then the middle byte for being zero
3146 (if the first byte is not). We could then check for
3147 following runs of zeros, and if above a certain size it is
3148 worth the 4 or 8 character hit of the byte insertions used
3149 to pad to the start of the zeroes. NOTE: This also depends
3150 on the alignment at the end of the zero run. */
3151 if (value == 0x00000000)
3154 if (*zerofill == 0xFFF) /* 12bit counter */
3155 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3160 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3161 count = pmon_makeb64 (value, p, 24, csum);
3173 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3174 output the message specified by MESG. Return -1 for failure, 0
3178 pmon_check_ack (char *mesg)
3180 #if defined(DOETXACK)
3185 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3187 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3189 fprintf_unfiltered (gdb_stderr,
3190 "Failed to receive valid ACK for %s\n", mesg);
3191 return (-1); /* Terminate the download. */
3194 #endif /* DOETXACK */
3198 /* pmon_download - Send a sequence of characters to the PMON download port,
3199 which is either a serial port or a UDP socket. */
3202 pmon_start_download (void)
3206 /* Create the temporary download file. */
3207 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3208 perror_with_name (tftp_localname);
3212 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3213 mips_expect ("Downloading from ");
3214 mips_expect (udp_in_use ? "udp" : "tty0");
3215 mips_expect (", ^C to abort\r\n");
3219 /* Look for the string specified by STRING sent from the target board
3220 during a download operation. If the string in question is not
3221 seen, output an error message, remove the temporary file, if
3222 appropriate, and return 0. Otherwise, return 1 to indicate
3226 mips_expect_download (char *string)
3228 if (!mips_expect (string))
3230 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3232 remove (tftp_localname); /* Remove temporary file. */
3239 /* Look for messages from the target board associated with the entry
3242 NOTE: This function doesn't indicate success or failure, so we
3243 have no way to determine whether or not the output from the board
3244 was correctly seen. However, given that other items are checked
3245 after this, it seems unlikely that those checks will pass if this
3246 check doesn't first (silently) pass. */
3249 pmon_check_entry_address (char *entry_address, int final)
3251 char hexnumber[9]; /* Includes '\0' space. */
3253 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3254 sprintf (hexnumber, "%x", final);
3255 mips_expect (hexnumber);
3256 mips_expect ("\r\n");
3259 /* Look for messages from the target board showing the total number of
3260 bytes downloaded to the board. Output 1 for success if the tail
3261 end of the message was read correctly, 0 otherwise. */
3264 pmon_check_total (int bintotal)
3266 char hexnumber[9]; /* Includes '\0' space. */
3268 mips_expect ("\r\ntotal = 0x");
3269 sprintf (hexnumber, "%x", bintotal);
3270 mips_expect (hexnumber);
3271 return mips_expect_download (" bytes\r\n");
3274 /* Look for the termination messages associated with the end of
3275 a download to the board.
3277 Also, when `tftp_in_use' is set, issue the load command to the
3278 board causing the file to be transferred. (This is done prior
3279 to looking for the above mentioned termination messages.) */
3282 pmon_end_download (int final, int bintotal)
3284 char hexnumber[9]; /* Includes '\0' space. */
3288 static char *load_cmd_prefix = "load -b -s ";
3292 /* Close off the temporary file containing the load data. */
3296 /* Make the temporary file readable by the world. */
3297 if (stat (tftp_localname, &stbuf) == 0)
3298 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3300 /* Must reinitialize the board to prevent PMON from crashing. */
3301 if (mips_monitor != MON_ROCKHOPPER)
3302 mips_send_command ("initEther\r", -1);
3304 /* Send the load command. */
3305 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3306 strcpy (cmd, load_cmd_prefix);
3307 strcat (cmd, tftp_name);
3309 mips_send_command (cmd, 0);
3311 if (!mips_expect_download ("Downloading from "))
3313 if (!mips_expect_download (tftp_name))
3315 if (!mips_expect_download (", ^C to abort\r\n"))
3319 /* Wait for the stuff that PMON prints after the load has completed.
3320 The timeout value for use in the tftp case (15 seconds) was picked
3321 arbitrarily but might be too small for really large downloads. FIXME. */
3322 switch (mips_monitor)
3325 pmon_check_ack ("termination");
3326 pmon_check_entry_address ("Entry address is ", final);
3327 if (!pmon_check_total (bintotal))
3330 case MON_ROCKHOPPER:
3331 if (!pmon_check_total (bintotal))
3333 pmon_check_entry_address ("Entry Address = ", final);
3336 pmon_check_entry_address ("Entry Address = ", final);
3337 pmon_check_ack ("termination");
3338 if (!pmon_check_total (bintotal))
3344 remove (tftp_localname); /* Remove temporary file. */
3347 /* Write the buffer specified by BUFFER of length LENGTH to either
3348 the board or the temporary file that'll eventually be transferred
3352 pmon_download (char *buffer, int length)
3358 written = fwrite (buffer, 1, length, tftp_file);
3359 if (written < length)
3360 perror_with_name (tftp_localname);
3363 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3366 /* Open object or executable file, FILE, and send it to the board
3367 using the FastLoad format. */
3370 pmon_load_fast (char *file)
3374 unsigned char *binbuf;
3377 unsigned int csum = 0;
3378 int hashmark = !tftp_in_use;
3382 struct cleanup *cleanup;
3384 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3385 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3387 abfd = gdb_bfd_open (file, NULL, -1);
3390 printf_filtered ("Unable to open file %s\n", file);
3393 cleanup = make_cleanup_bfd_unref (abfd);
3395 if (bfd_check_format (abfd, bfd_object) == 0)
3397 printf_filtered ("File is not an object file\n");
3398 do_cleanups (cleanup);
3402 /* Setup the required download state: */
3403 mips_send_command ("set dlproto etxack\r", -1);
3404 mips_send_command ("set dlecho off\r", -1);
3405 /* NOTE: We get a "cannot set variable" message if the variable is
3406 already defined to have the argument we give. The code doesn't
3407 care, since it just scans to the next prompt anyway. */
3408 /* Start the download: */
3409 pmon_start_download ();
3411 /* Zero the checksum. */
3412 sprintf (buffer, "/Kxx\n");
3413 reclen = strlen (buffer);
3414 pmon_download (buffer, reclen);
3415 finished = pmon_check_ack ("/Kxx");
3417 for (s = abfd->sections; s && !finished; s = s->next)
3418 if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */
3420 bintotal += bfd_get_section_size (s);
3421 final = (s->vma + bfd_get_section_size (s));
3423 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name,
3424 (unsigned int) s->vma,
3425 (unsigned int) (s->vma + bfd_get_section_size (s)));
3426 gdb_flush (gdb_stdout);
3428 /* Output the starting address. */
3429 sprintf (buffer, "/A");
3430 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3431 buffer[2 + reclen] = '\n';
3432 buffer[3 + reclen] = '\0';
3433 reclen += 3; /* For the initial escape code and carriage return. */
3434 pmon_download (buffer, reclen);
3435 finished = pmon_check_ack ("/A");
3439 unsigned int binamount;
3440 unsigned int zerofill = 0;
3447 i < bfd_get_section_size (s) && !finished;
3452 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3454 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3456 /* This keeps a rolling checksum, until we decide to output
3458 for (; ((binamount - binptr) > 0);)
3460 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3461 &reclen, &csum, &zerofill);
3462 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3464 reclen = pmon_checkset (reclen, &bp, &csum);
3465 pmon_download (buffer, reclen);
3466 finished = pmon_check_ack ("data record");
3469 zerofill = 0; /* Do not transmit pending
3474 if (deprecated_ui_load_progress_hook)
3475 deprecated_ui_load_progress_hook (s->name, i);
3479 putchar_unfiltered ('#');
3480 gdb_flush (gdb_stdout);
3484 reclen = 0; /* buffer processed */
3489 /* Ensure no out-standing zerofill requests: */
3491 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3493 /* and then flush the line: */
3496 reclen = pmon_checkset (reclen, &bp, &csum);
3497 /* Currently pmon_checkset outputs the line terminator by
3498 default, so we write out the buffer so far: */
3499 pmon_download (buffer, reclen);
3500 finished = pmon_check_ack ("record remnant");
3504 putchar_unfiltered ('\n');
3507 /* Terminate the transfer. We know that we have an empty output
3508 buffer at this point. */
3509 sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */
3510 reclen = strlen (buffer);
3511 pmon_download (buffer, reclen);
3514 { /* Ignore the termination message: */
3515 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3518 { /* Deal with termination message: */
3519 pmon_end_download (final, bintotal);
3522 do_cleanups (cleanup);
3526 /* mips_load -- download a file. */
3529 mips_load (char *file, int from_tty)
3531 struct regcache *regcache;
3533 /* Get the board out of remote debugging mode. */
3534 if (mips_exit_debug ())
3535 error (_("mips_load: Couldn't get into monitor mode."));
3537 if (mips_monitor != MON_IDT)
3538 pmon_load_fast (file);
3540 mips_load_srec (file);
3544 /* Finally, make the PC point at the start address. */
3545 regcache = get_current_regcache ();
3546 if (mips_monitor != MON_IDT)
3548 /* Work around problem where PMON monitor updates the PC after a load
3549 to a different value than GDB thinks it has. The following ensures
3550 that the regcache_write_pc() WILL update the PC value: */
3551 regcache_invalidate (regcache,
3552 mips_regnum (get_regcache_arch (regcache))->pc);
3555 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3558 /* Check to see if a thread is still alive. */
3561 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3563 if (ptid_equal (ptid, remote_mips_ptid))
3564 /* The monitor's task is always alive. */
3570 /* Convert a thread ID to a string. Returns the string in a static
3574 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3576 static char buf[64];
3578 if (ptid_equal (ptid, remote_mips_ptid))
3580 xsnprintf (buf, sizeof buf, "Thread <main>");
3584 return normal_pid_to_str (ptid);
3587 /* Pass the command argument as a packet to PMON verbatim. */
3590 pmon_command (char *args, int from_tty)
3592 char buf[DATA_MAXLEN + 1];
3595 sprintf (buf, "0x0 %s", args);
3596 mips_send_packet (buf, 1);
3597 printf_filtered ("Send packet: %s\n", buf);
3599 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3601 printf_filtered ("Received packet: %s\n", buf);
3604 /* -Wmissing-prototypes */
3605 extern initialize_file_ftype _initialize_remote_mips;
3607 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3608 Create target specific commands and perform other initializations
3609 specific to this file. */
3612 _initialize_remote_mips (void)
3614 /* Initialize the fields in mips_ops that are common to all four targets. */
3615 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3616 mips_ops.to_close = mips_close;
3617 mips_ops.to_detach = mips_detach;
3618 mips_ops.to_resume = mips_resume;
3619 mips_ops.to_fetch_registers = mips_fetch_registers;
3620 mips_ops.to_store_registers = mips_store_registers;
3621 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3622 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3623 mips_ops.to_files_info = mips_files_info;
3624 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3625 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3626 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3627 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3628 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3629 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3630 mips_ops.to_kill = mips_kill;
3631 mips_ops.to_load = mips_load;
3632 mips_ops.to_create_inferior = mips_create_inferior;
3633 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3634 mips_ops.to_thread_alive = mips_thread_alive;
3635 mips_ops.to_pid_to_str = mips_pid_to_str;
3636 mips_ops.to_log_command = serial_log_command;
3637 mips_ops.to_stratum = process_stratum;
3638 mips_ops.to_has_all_memory = default_child_has_all_memory;
3639 mips_ops.to_has_memory = default_child_has_memory;
3640 mips_ops.to_has_stack = default_child_has_stack;
3641 mips_ops.to_has_registers = default_child_has_registers;
3642 mips_ops.to_has_execution = default_child_has_execution;
3643 mips_ops.to_magic = OPS_MAGIC;
3645 /* Copy the common fields to all four target vectors. */
3646 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3648 /* Initialize target-specific fields in the target vectors. */
3649 mips_ops.to_shortname = "mips";
3650 mips_ops.to_doc = "\
3651 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3652 The argument is the device it is connected to or, if it contains a colon,\n\
3653 HOST:PORT to access a board over a network";
3654 mips_ops.to_open = mips_open;
3655 mips_ops.to_wait = mips_wait;
3657 pmon_ops.to_shortname = "pmon";
3658 pmon_ops.to_doc = "\
3659 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3660 line. The argument is the device it is connected to or, if it contains a\n\
3661 colon, HOST:PORT to access a board over a network";
3662 pmon_ops.to_open = pmon_open;
3663 pmon_ops.to_wait = mips_wait;
3665 ddb_ops.to_shortname = "ddb";
3667 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3668 line. The first argument is the device it is connected to or, if it contains\n\
3669 a colon, HOST:PORT to access a board over a network. The optional second\n\
3670 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3671 TFTP downloads to the board. The optional third parameter is the local name\n\
3672 of the TFTP temporary file, if it differs from the filename seen by the board.";
3673 ddb_ops.to_open = ddb_open;
3674 ddb_ops.to_wait = mips_wait;
3676 rockhopper_ops.to_shortname = "rockhopper";
3677 rockhopper_ops.to_doc = ddb_ops.to_doc;
3678 rockhopper_ops.to_open = rockhopper_open;
3679 rockhopper_ops.to_wait = mips_wait;
3681 lsi_ops.to_shortname = "lsi";
3682 lsi_ops.to_doc = pmon_ops.to_doc;
3683 lsi_ops.to_open = lsi_open;
3684 lsi_ops.to_wait = mips_wait;
3686 /* Add the targets. */
3687 add_target (&mips_ops);
3688 add_target (&pmon_ops);
3689 add_target (&ddb_ops);
3690 add_target (&lsi_ops);
3691 add_target (&rockhopper_ops);
3693 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3694 Set timeout in seconds for remote MIPS serial I/O."), _("\
3695 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3697 NULL, /* FIXME: i18n: */
3698 &setlist, &showlist);
3700 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3701 &mips_retransmit_wait, _("\
3702 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3703 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3704 This is the number of seconds to wait for an acknowledgement to a packet\n\
3705 before resending the packet."),
3707 NULL, /* FIXME: i18n: */
3708 &setlist, &showlist);
3710 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3711 &mips_syn_garbage, _("\
3712 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3713 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3714 This is the maximum number of characters GDB will ignore when trying to\n\
3715 synchronize with the remote system. A value of -1 means that there is no\n\
3716 limit. (Note that these characters are printed out even though they are\n\
3719 NULL, /* FIXME: i18n: */
3720 &setlist, &showlist);
3722 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3723 &mips_monitor_prompt, _("\
3724 Set the prompt that GDB expects from the monitor."), _("\
3725 Show the prompt that GDB expects from the monitor."), NULL,
3727 NULL, /* FIXME: i18n: */
3728 &setlist, &showlist);
3730 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3731 &monitor_warnings, _("\
3732 Set printing of monitor warnings."), _("\
3733 Show printing of monitor warnings."), _("\
3734 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3736 NULL, /* FIXME: i18n: */
3737 &setlist, &showlist);
3739 add_com ("pmon", class_obscure, pmon_command,
3740 _("Send a packet to PMON (must be in debug mode)."));
3742 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3743 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3744 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3745 Use \"on\" to enable the masking and \"off\" to disable it."),
3747 NULL, /* FIXME: i18n: */
3748 &setlist, &showlist);
3749 remote_mips_ptid = ptid_build (42000, 0, 42000);