1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2014 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"
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 (struct target_ops *self);
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 target_ops *self,
94 struct regcache *regcache);
96 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
98 static int mips_store_word (CORE_ADDR addr, unsigned int value,
101 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
103 struct mem_attrib *attrib,
104 struct target_ops *target);
106 static void mips_files_info (struct target_ops *ignore);
108 static void mips_mourn_inferior (struct target_ops *ops);
110 static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum);
112 static int pmon_zeroset (int recsize, char **buff, unsigned int *amount,
113 unsigned int *chksum);
115 static int pmon_checkset (int recsize, char **buff, unsigned int *value);
117 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
118 int *inptr, int inamount, int *recsize,
119 unsigned int *csum, unsigned int *zerofill);
121 static int pmon_check_ack (char *mesg);
123 static void pmon_start_download (void);
125 static void pmon_end_download (int final, int bintotal);
127 static void pmon_download (char *buffer, int length);
129 static void pmon_load_fast (char *file);
131 static void mips_load (char *file, int from_tty);
133 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
134 unsigned char *myaddr, int len);
136 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
138 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
139 enum break_type type);
141 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
142 enum break_type type);
144 /* Forward declarations. */
145 extern struct target_ops mips_ops;
146 extern struct target_ops pmon_ops;
147 extern struct target_ops ddb_ops;
148 extern struct target_ops rockhopper_ops;
150 /* The MIPS remote debugging interface is built on top of a simple
151 packet protocol. Each packet is organized as follows:
153 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
154 may not appear anywhere else in the packet. Any time a SYN is
155 seen, a new packet should be assumed to have begun.
158 This byte contains the upper five bits of the logical length
159 of the data section, plus a single bit indicating whether this
160 is a data packet or an acknowledgement. The documentation
161 indicates that this bit is 1 for a data packet, but the actual
162 board uses 1 for an acknowledgement. The value of the byte is
163 0x40 + (ack ? 0x20 : 0) + (len >> 6)
164 (we always have 0 <= len < 1024). Acknowledgement packets do
165 not carry data, and must have a data length of 0.
167 LEN1 This byte contains the lower six bits of the logical length of
168 the data section. The value is
171 SEQ This byte contains the six bit sequence number of the packet.
174 An acknowlegment packet contains the sequence number of the
175 packet being acknowledged plus 1 modulo 64. Data packets are
176 transmitted in sequence. There may only be one outstanding
177 unacknowledged data packet at a time. The sequence numbers
178 are independent in each direction. If an acknowledgement for
179 the previous packet is received (i.e., an acknowledgement with
180 the sequence number of the packet just sent) the packet just
181 sent should be retransmitted. If no acknowledgement is
182 received within a timeout period, the packet should be
183 retransmitted. This has an unfortunate failure condition on a
184 high-latency line, as a delayed acknowledgement may lead to an
185 endless series of duplicate packets.
187 DATA The actual data bytes follow. The following characters are
188 escaped inline with DLE (ASCII 020, or ^P):
194 The additional DLE characters are not counted in the logical
195 length stored in the TYPE_LEN and LEN1 bytes.
200 These bytes contain an 18 bit checksum of the complete
201 contents of the packet excluding the SEQ byte and the
202 CSUM[123] bytes. The checksum is simply the twos complement
203 addition of all the bytes treated as unsigned characters. The
204 values of the checksum bytes are:
205 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
206 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
207 CSUM3: 0x40 + (cksum & 0x3f)
209 It happens that the MIPS remote debugging protocol always
210 communicates with ASCII strings. Because of this, this
211 implementation doesn't bother to handle the DLE quoting mechanism,
212 since it will never be required. */
216 /* The SYN character which starts each packet. */
219 /* The 0x40 used to offset each packet (this value ensures that all of
220 the header and trailer bytes, other than SYN, are printable ASCII
222 #define HDR_OFFSET 0x40
224 /* The indices of the bytes in the packet header. */
225 #define HDR_INDX_SYN 0
226 #define HDR_INDX_TYPE_LEN 1
227 #define HDR_INDX_LEN1 2
228 #define HDR_INDX_SEQ 3
231 /* The data/ack bit in the TYPE_LEN header byte. */
232 #define TYPE_LEN_DA_BIT 0x20
233 #define TYPE_LEN_DATA 0
234 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
236 /* How to compute the header bytes. */
237 #define HDR_SET_SYN(data, len, seq) (SYN)
238 #define HDR_SET_TYPE_LEN(data, len, seq) \
240 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
241 + (((len) >> 6) & 0x1f))
242 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
243 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
245 /* Check that a header byte is reasonable. */
246 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
248 /* Get data from the header. These macros evaluate their argument
250 #define HDR_IS_DATA(hdr) \
251 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
252 #define HDR_GET_LEN(hdr) \
253 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
254 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
256 /* The maximum data length. */
257 #define DATA_MAXLEN 1023
259 /* The trailer offset. */
260 #define TRLR_OFFSET HDR_OFFSET
262 /* The indices of the bytes in the packet trailer. */
263 #define TRLR_INDX_CSUM1 0
264 #define TRLR_INDX_CSUM2 1
265 #define TRLR_INDX_CSUM3 2
266 #define TRLR_LENGTH 3
268 /* How to compute the trailer bytes. */
269 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
270 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
271 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
273 /* Check that a trailer byte is reasonable. */
274 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
276 /* Get data from the trailer. This evaluates its argument multiple
278 #define TRLR_GET_CKSUM(trlr) \
279 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
280 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
281 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
283 /* The sequence number modulos. */
284 #define SEQ_MODULOS (64)
286 /* PMON commands to load from the serial port or UDP socket. */
287 #define LOAD_CMD "load -b -s tty0\r"
288 #define LOAD_CMD_UDP "load -b -s udp\r"
290 /* The target vectors for the four different remote MIPS targets.
291 These are initialized with code in _initialize_remote_mips instead
292 of static initializers, to make it easier to extend the target_ops
294 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
296 enum mips_monitor_type
298 /* IDT/SIM monitor being used: */
300 /* PMON monitor being used: */
301 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET]
302 Algorithmics Ltd. Nov 9 1995 17:19:50 */
303 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET]
304 Risq Modular Systems,
305 Thu Jun 6 09:28:40 PDT 1996 */
306 MON_LSI, /* 4.3.12 [EB,FP],
307 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
309 /* Last and unused value, for sizing vectors, etc. */
312 static enum mips_monitor_type mips_monitor = MON_LAST;
314 /* The monitor prompt text. If the user sets the PMON prompt
315 to some new value, the GDB `set monitor-prompt' command must also
316 be used to inform GDB about the expected prompt. Otherwise, GDB
317 will not be able to connect to PMON in mips_initialize().
318 If the `set monitor-prompt' command is not used, the expected
319 default prompt will be set according the target:
326 static char *mips_monitor_prompt;
328 /* Set to 1 if the target is open. */
329 static int mips_is_open;
331 /* Currently active target description (if mips_is_open == 1). */
332 static struct target_ops *current_ops;
334 /* Set to 1 while the connection is being initialized. */
335 static int mips_initializing;
337 /* Set to 1 while the connection is being brought down. */
338 static int mips_exiting;
340 /* The next sequence number to send. */
341 static unsigned int mips_send_seq;
343 /* The next sequence number we expect to receive. */
344 static unsigned int mips_receive_seq;
346 /* The time to wait before retransmitting a packet, in seconds. */
347 static int mips_retransmit_wait = 3;
349 /* The number of times to try retransmitting a packet before giving up. */
350 static int mips_send_retries = 10;
352 /* The number of garbage characters to accept when looking for an
353 SYN for the next packet. */
354 static int mips_syn_garbage = 10;
356 /* The time to wait for a packet, in seconds. */
357 static int mips_receive_wait = 5;
359 /* Set if we have sent a packet to the board but have not yet received
361 static int mips_need_reply = 0;
363 /* Handle used to access serial I/O stream. */
364 static struct serial *mips_desc;
366 /* UDP handle used to download files to target. */
367 static struct serial *udp_desc;
368 static int udp_in_use;
370 /* TFTP filename used to download files to DDB board, in the form
372 static char *tftp_name; /* host:filename */
373 static char *tftp_localname; /* filename portion of above */
374 static int tftp_in_use;
375 static FILE *tftp_file;
377 /* Counts the number of times the user tried to interrupt the target (usually
379 static int interrupt_count;
381 /* If non-zero, means that the target is running. */
382 static int mips_wait_flag = 0;
384 /* If non-zero, monitor supports breakpoint commands. */
385 static int monitor_supports_breakpoints = 0;
387 /* Data cache header. */
389 #if 0 /* not used (yet?) */
390 static DCACHE *mips_dcache;
393 /* Non-zero means that we've just hit a read or write watchpoint. */
394 static int hit_watchpoint;
396 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
397 The table is indexed by a breakpoint number, which is an integer
398 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
400 #define MAX_LSI_BREAKPOINTS 256
401 struct lsi_breakpoint_info
403 enum break_type type; /* type of breakpoint */
404 CORE_ADDR addr; /* address of breakpoint */
405 int len; /* length of region being watched */
406 unsigned long value; /* value to watch */
408 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
410 /* Error/warning codes returned by LSI PMON for breakpoint commands.
411 Warning values may be ORed together; error values may not. */
412 #define W_WARN 0x100 /* This bit is set if the error code
414 #define W_MSK 0x101 /* warning: Range feature is supported
416 #define W_VAL 0x102 /* warning: Value check is not
417 supported in hardware */
418 #define W_QAL 0x104 /* warning: Requested qualifiers are
419 not supported in hardware */
421 #define E_ERR 0x200 /* This bit is set if the error code
423 #define E_BPT 0x200 /* error: No such breakpoint number */
424 #define E_RGE 0x201 /* error: Range is not supported */
425 #define E_QAL 0x202 /* error: The requested qualifiers can
427 #define E_OUT 0x203 /* error: Out of hardware resources */
428 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
432 int code; /* error code */
433 char *string; /* string associated with this code */
436 struct lsi_error lsi_warning_table[] =
438 {W_MSK, "Range feature is supported via mask"},
439 {W_VAL, "Value check is not supported in hardware"},
440 {W_QAL, "Requested qualifiers are not supported in hardware"},
444 struct lsi_error lsi_error_table[] =
446 {E_BPT, "No such breakpoint number"},
447 {E_RGE, "Range is not supported"},
448 {E_QAL, "The requested qualifiers can not be used"},
449 {E_OUT, "Out of hardware resources"},
450 {E_NON, "Hardware breakpoint not supported"},
454 /* Set to 1 with the 'set monitor-warnings' command to enable printing
455 of warnings returned by PMON when hardware breakpoints are used. */
456 static int monitor_warnings;
458 /* This is the ptid we use while we're connected to the remote. Its
459 value is arbitrary, as the remote-mips target doesn't have a notion of
460 processes or threads, but we need something non-null to place in
462 static ptid_t remote_mips_ptid;
464 /* Close any ports which might be open. Reset certain globals indicating
465 the state of those ports. */
471 serial_close (mips_desc);
475 serial_close (udp_desc);
481 /* Handle low-level error that we can't recover from. Note that just
482 error()ing out from target_wait or some such low-level place will cause
483 all hell to break loose--the rest of GDB will tend to get left in an
484 inconsistent state. */
486 static void ATTRIBUTE_NORETURN
487 mips_error (char *string,...)
492 target_terminal_ours ();
493 wrap_here (""); /* Force out any buffered output. */
494 gdb_flush (gdb_stdout);
495 gdb_flush (gdb_stderr);
497 /* Clean up in such a way that mips_close won't try to talk to the
498 board (it almost surely won't work since we weren't able to talk to
502 if (!ptid_equal (inferior_ptid, null_ptid))
503 target_mourn_inferior ();
505 fmt = concat (_("Ending remote MIPS debugging: "),
506 string, (char *) NULL);
507 make_cleanup (xfree, fmt);
509 va_start (args, string);
510 throw_verror (TARGET_CLOSE_ERROR, fmt, args);
514 /* putc_readable - print a character, displaying non-printable chars in
515 ^x notation or in hex. */
518 fputc_readable (int ch, struct ui_file *file)
521 fputc_unfiltered ('\n', file);
523 fprintf_unfiltered (file, "\\r");
524 else if (ch < 0x20) /* ASCII control character */
525 fprintf_unfiltered (file, "^%c", ch + '@');
526 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
527 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
529 fputc_unfiltered (ch, file);
533 /* puts_readable - print a string, displaying non-printable chars in
534 ^x notation or in hex. */
537 fputs_readable (const char *string, struct ui_file *file)
541 while ((c = *string++) != '\0')
542 fputc_readable (c, file);
546 /* Read P as a hex value. Return true if every character made sense,
547 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
550 read_hex_value (const char *p, ULONGEST *result)
558 if (*p >= '0' && *p <= '9')
560 else if (*p >= 'A' && *p <= 'F')
561 retval |= *p - 'A' + 10;
562 else if (*p >= 'a' && *p <= 'f')
563 retval |= *p - 'a' + 10;
573 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
574 timed out. TIMEOUT specifies timeout value in seconds. */
577 mips_expect_timeout (const char *string, int timeout)
579 const char *p = string;
583 fprintf_unfiltered (gdb_stdlog, "Expected \"");
584 fputs_readable (string, gdb_stdlog);
585 fprintf_unfiltered (gdb_stdlog, "\", got \"");
594 /* Must use serial_readchar() here cuz mips_readchar would get
595 confused if we were waiting for the mips_monitor_prompt... */
597 c = serial_readchar (mips_desc, timeout);
599 if (c == SERIAL_TIMEOUT)
602 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
607 fputc_readable (c, gdb_stdlog);
615 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
628 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
629 timed out. The timeout value is hard-coded to 2 seconds. Use
630 mips_expect_timeout if a different timeout value is needed. */
633 mips_expect (const char *string)
635 return mips_expect_timeout (string, remote_timeout);
638 /* Read a character from the remote, aborting on error. Returns
639 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
640 returns). FIXME: If we see the string mips_monitor_prompt from the
641 board, then we are debugging on the main console port, and we have
642 somehow dropped out of remote debugging mode. In this case, we
643 automatically go back in to remote debugging mode. This is a hack,
644 put in because I can't find any way for a program running on the
645 remote board to terminate without also ending remote debugging
646 mode. I assume users won't have any trouble with this; for one
647 thing, the IDT documentation generally assumes that the remote
648 debugging port is not the console port. This is, however, very
649 convenient for DejaGnu when you only have one connected serial
653 mips_readchar (int timeout)
656 static int state = 0;
657 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
659 { /* FIXME this whole block is dead code! */
663 if (i == -1 && watchdog > 0)
667 if (state == mips_monitor_prompt_len)
669 ch = serial_readchar (mips_desc, timeout);
671 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */
673 target_mourn_inferior ();
674 error (_("Watchdog has expired. Target detached."));
677 if (ch == SERIAL_EOF)
678 mips_error (_("End of file from remote"));
679 if (ch == SERIAL_ERROR)
680 mips_error (_("Error reading from remote: %s"), safe_strerror (errno));
681 if (remote_debug > 1)
683 /* Don't use _filtered; we can't deal with a QUIT out of
684 target_wait, and I think this might be called from there. */
685 if (ch != SERIAL_TIMEOUT)
686 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
688 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
691 /* If we have seen mips_monitor_prompt and we either time out, or
692 we see a @ (which was echoed from a packet we sent), reset the
693 board as described above. The first character in a packet after
694 the SYN (which is not echoed) is always an @ unless the packet is
695 more than 64 characters long, which ours never are. */
696 if ((ch == SERIAL_TIMEOUT || ch == '@')
697 && state == mips_monitor_prompt_len
698 && !mips_initializing
701 if (remote_debug > 0)
702 /* Don't use _filtered; we can't deal with a QUIT out of
703 target_wait, and I think this might be called from there. */
704 fprintf_unfiltered (gdb_stdlog,
705 "Reinitializing MIPS debugging mode\n");
712 /* At this point, about the only thing we can do is abort the command
713 in progress and get back to command level as quickly as possible. */
715 error (_("Remote board reset, debug protocol re-initialized."));
718 if (ch == mips_monitor_prompt[state])
726 /* Get a packet header, putting the data in the supplied buffer.
727 PGARBAGE is a pointer to the number of garbage characters received
728 so far. CH is the last character received. Returns 0 for success,
729 or -1 for timeout. */
732 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
738 /* Wait for a SYN. mips_syn_garbage is intended to prevent
739 sitting here indefinitely if the board sends us one garbage
740 character per second. ch may already have a value from the
741 last time through the loop. */
744 ch = mips_readchar (timeout);
745 if (ch == SERIAL_TIMEOUT)
749 /* Printing the character here lets the user of gdb see
750 what the program is outputting, if the debugging is
751 being done on the console port. Don't use _filtered:
752 we can't deal with a QUIT out of target_wait and
753 buffered target output confuses the user. */
754 if (!mips_initializing || remote_debug > 0)
756 if (isprint (ch) || isspace (ch))
758 fputc_unfiltered (ch, gdb_stdtarg);
762 fputc_readable (ch, gdb_stdtarg);
764 gdb_flush (gdb_stdtarg);
767 /* Only count unprintable characters. */
768 if (! (isprint (ch) || isspace (ch)))
771 if (mips_syn_garbage > 0
772 && *pgarbage > mips_syn_garbage)
773 mips_error (_("Debug protocol failure: more "
774 "than %d characters before a sync."),
779 /* Get the packet header following the SYN. */
780 for (i = 1; i < HDR_LENGTH; i++)
782 ch = mips_readchar (timeout);
783 if (ch == SERIAL_TIMEOUT)
785 /* Make sure this is a header byte. */
786 if (ch == SYN || !HDR_CHECK (ch))
792 /* If we got the complete header, we can return. Otherwise we
793 loop around and keep looking for SYN. */
799 /* Get a packet header, putting the data in the supplied buffer.
800 PGARBAGE is a pointer to the number of garbage characters received
801 so far. The last character read is returned in *PCH. Returns 0
802 for success, -1 for timeout, -2 for error. */
805 mips_receive_trailer (unsigned char *trlr, int *pgarbage,
806 int *pch, int timeout)
811 for (i = 0; i < TRLR_LENGTH; i++)
813 ch = mips_readchar (timeout);
815 if (ch == SERIAL_TIMEOUT)
817 if (!TRLR_CHECK (ch))
824 /* Get the checksum of a packet. HDR points to the packet header.
825 DATASTR points to the packet data. LEN is the length of DATASTR. */
828 mips_cksum (const unsigned char *hdr, const char *datastr, int len)
830 const unsigned char *p;
831 const unsigned char *data = (const unsigned char *) datastr;
837 /* The initial SYN is not included in the checksum. */
851 /* Send a packet containing the given ASCII string. */
854 mips_send_packet (const char *s, int get_ack)
856 /* unsigned */ int len;
857 unsigned char *packet;
862 if (len > DATA_MAXLEN)
863 mips_error (_("MIPS protocol data packet too long: %s"), s);
865 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
867 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
868 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
869 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
870 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
872 memcpy (packet + HDR_LENGTH, s, len);
874 cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len);
875 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
876 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
877 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
879 /* Increment the sequence number. This will set mips_send_seq to
880 the sequence number we expect in the acknowledgement. */
881 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
883 /* We can only have one outstanding data packet, so we just wait for
884 the acknowledgement here. Keep retransmitting the packet until
885 we get one, or until we've tried too many times. */
886 for (try = 0; try < mips_send_retries; try++)
891 if (remote_debug > 0)
893 /* Don't use _filtered; we can't deal with a QUIT out of
894 target_wait, and I think this might be called from there. */
895 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
896 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
899 if (serial_write (mips_desc, packet,
900 HDR_LENGTH + len + TRLR_LENGTH) != 0)
901 mips_error (_("write to target failed: %s"), safe_strerror (errno));
910 unsigned char hdr[HDR_LENGTH + 1];
911 unsigned char trlr[TRLR_LENGTH + 1];
915 /* Get the packet header. If we time out, resend the data
917 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
923 /* If we get a data packet, assume it is a duplicate and
924 ignore it. FIXME: If the acknowledgement is lost, this
925 data packet may be the packet the remote sends after the
927 if (HDR_IS_DATA (hdr))
931 /* Ignore any errors raised whilst attempting to ignore
934 len = HDR_GET_LEN (hdr);
936 for (i = 0; i < len; i++)
940 rch = mips_readchar (remote_timeout);
946 if (rch == SERIAL_TIMEOUT)
948 /* Ignore the character. */
952 (void) mips_receive_trailer (trlr, &garbage, &ch,
955 /* We don't bother checking the checksum, or providing an
956 ACK to the packet. */
960 /* If the length is not 0, this is a garbled packet. */
961 if (HDR_GET_LEN (hdr) != 0)
964 /* Get the packet trailer. */
965 err = mips_receive_trailer (trlr, &garbage, &ch,
966 mips_retransmit_wait);
968 /* If we timed out, resend the data packet. */
972 /* If we got a bad character, reread the header. */
976 /* If the checksum does not match the trailer checksum, this
977 is a bad packet; ignore it. */
978 if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr))
981 if (remote_debug > 0)
983 hdr[HDR_LENGTH] = '\0';
984 trlr[TRLR_LENGTH] = '\0';
985 /* Don't use _filtered; we can't deal with a QUIT out of
986 target_wait, and I think this might be called from there. */
987 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
988 HDR_GET_SEQ (hdr), hdr + 1, trlr);
991 /* If this ack is for the current packet, we're done. */
992 seq = HDR_GET_SEQ (hdr);
993 if (seq == mips_send_seq)
996 /* If this ack is for the last packet, resend the current
998 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1001 /* Otherwise this is a bad ack; ignore it. Increment the
1002 garbage count to ensure that we do not stay in this loop
1008 mips_error (_("Remote did not acknowledge packet"));
1011 /* Receive and acknowledge a packet, returning the data in BUFF (which
1012 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1013 implies that only the sender retransmits packets, so this code just
1014 waits silently for a packet. It returns the length of the received
1015 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1016 don't print an error message and return -1. */
1019 mips_receive_packet (char *buff, int throw_error, int timeout)
1024 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1031 unsigned char hdr[HDR_LENGTH];
1032 unsigned char trlr[TRLR_LENGTH];
1036 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1039 mips_error (_("Timed out waiting for remote packet"));
1046 /* An acknowledgement is probably a duplicate; ignore it. */
1047 if (!HDR_IS_DATA (hdr))
1049 len = HDR_GET_LEN (hdr);
1050 /* Check if the length is valid for an ACK, we may aswell
1051 try and read the remainder of the packet: */
1054 /* Ignore the error condition, since we are going to
1055 ignore the packet anyway. */
1056 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1058 /* Don't use _filtered; we can't deal with a QUIT out of
1059 target_wait, and I think this might be called from there. */
1060 if (remote_debug > 0)
1061 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1065 len = HDR_GET_LEN (hdr);
1066 for (i = 0; i < len; i++)
1070 rch = mips_readchar (timeout);
1076 if (rch == SERIAL_TIMEOUT)
1079 mips_error (_("Timed out waiting for remote packet"));
1088 /* Don't use _filtered; we can't deal with a QUIT out of
1089 target_wait, and I think this might be called from there. */
1090 if (remote_debug > 0)
1091 fprintf_unfiltered (gdb_stdlog,
1092 "Got new SYN after %d chars (wanted %d)\n",
1097 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1101 mips_error (_("Timed out waiting for packet"));
1107 /* Don't use _filtered; we can't deal with a QUIT out of
1108 target_wait, and I think this might be called from there. */
1109 if (remote_debug > 0)
1110 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1114 /* If this is the wrong sequence number, ignore it. */
1115 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1117 /* Don't use _filtered; we can't deal with a QUIT out of
1118 target_wait, and I think this might be called from there. */
1119 if (remote_debug > 0)
1120 fprintf_unfiltered (gdb_stdlog,
1121 "Ignoring sequence number %d (want %d)\n",
1122 HDR_GET_SEQ (hdr), mips_receive_seq);
1126 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1129 if (remote_debug > 0)
1130 /* Don't use _filtered; we can't deal with a QUIT out of
1131 target_wait, and I think this might be called from there. */
1132 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1133 mips_cksum (hdr, buff, len),
1134 TRLR_GET_CKSUM (trlr));
1136 /* The checksum failed. Send an acknowledgement for the
1137 previous packet to tell the remote to resend the packet. */
1138 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1139 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1140 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1141 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1143 cksum = mips_cksum (ack, NULL, 0);
1145 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1146 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1147 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1149 if (remote_debug > 0)
1151 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1152 /* Don't use _filtered; we can't deal with a QUIT out of
1153 target_wait, and I think this might be called from there. */
1154 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1158 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1161 mips_error (_("write to target failed: %s"),
1162 safe_strerror (errno));
1168 if (remote_debug > 0)
1171 /* Don't use _filtered; we can't deal with a QUIT out of
1172 target_wait, and I think this might be called from there. */
1173 printf_unfiltered ("Got packet \"%s\"\n", buff);
1176 /* We got the packet. Send an acknowledgement. */
1177 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1179 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1180 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1181 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1182 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1184 cksum = mips_cksum (ack, NULL, 0);
1186 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1187 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1188 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1190 if (remote_debug > 0)
1192 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1193 /* Don't use _filtered; we can't deal with a QUIT out of
1194 target_wait, and I think this might be called from there. */
1195 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1199 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1202 mips_error (_("write to target failed: %s"), safe_strerror (errno));
1210 /* Optionally send a request to the remote system and optionally wait
1211 for the reply. This implements the remote debugging protocol,
1212 which is built on top of the packet protocol defined above. Each
1213 request has an ADDR argument and a DATA argument. The following
1214 requests are defined:
1216 \0 don't send a request; just wait for a reply
1217 i read word from instruction space at ADDR
1218 d read word from data space at ADDR
1219 I write DATA to instruction space at ADDR
1220 D write DATA to data space at ADDR
1221 r read register number ADDR
1222 R set register number ADDR to value DATA
1223 c continue execution (if ADDR != 1, set pc to ADDR)
1224 s single step (if ADDR != 1, set pc to ADDR)
1226 The read requests return the value requested. The write requests
1227 return the previous value in the changed location. The execution
1228 requests return a UNIX wait value (the approximate signal which
1229 caused execution to stop is in the upper eight bits).
1231 If PERR is not NULL, this function waits for a reply. If an error
1232 occurs, it sets *PERR to 1 and sets errno according to what the
1233 target board reports. */
1236 mips_request (int cmd,
1243 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
1244 char myBuff[DATA_MAXLEN + 1];
1245 char response_string[17];
1252 if (buff == (char *) NULL)
1257 if (mips_need_reply)
1258 internal_error (__FILE__, __LINE__,
1259 _("mips_request: Trying to send "
1260 "command before reply"));
1261 /* 'T' sets a register to a 64-bit value, so make sure we use
1262 the right conversion function. */
1264 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1265 phex_nz (addr, addr_size), phex_nz (data, 8));
1267 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1268 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1270 mips_send_packet (buff, 1);
1271 mips_need_reply = 1;
1274 if (perr == (int *) NULL)
1277 if (!mips_need_reply)
1278 internal_error (__FILE__, __LINE__,
1279 _("mips_request: Trying to get reply before command"));
1281 mips_need_reply = 0;
1283 len = mips_receive_packet (buff, 1, timeout);
1286 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1287 &rpid, &rcmd, &rerrflg, response_string) != 4
1288 || !read_hex_value (response_string, &rresponse)
1289 || (cmd != '\0' && rcmd != cmd))
1290 mips_error (_("Bad response from remote board"));
1296 /* FIXME: This will returns MIPS errno numbers, which may or may
1297 not be the same as errno values used on other systems. If
1298 they stick to common errno values, they will be the same, but
1299 if they don't, they must be translated. */
1309 /* Cleanup associated with mips_initialize(). */
1312 mips_initialize_cleanups (void *arg)
1314 mips_initializing = 0;
1317 /* Cleanup associated with mips_exit_debug(). */
1320 mips_exit_cleanups (void *arg)
1325 /* Send a command and wait for that command to be echoed back. Wait,
1326 too, for the following prompt. */
1329 mips_send_command (const char *cmd, int prompt)
1331 serial_write (mips_desc, cmd, strlen (cmd));
1335 mips_expect (mips_monitor_prompt);
1338 /* Enter remote (dbx) debug mode: */
1341 mips_enter_debug (void)
1343 /* Reset the sequence numbers, ready for the new debug sequence: */
1345 mips_receive_seq = 0;
1347 if (mips_monitor != MON_IDT)
1348 mips_send_command ("debug\r", 0);
1349 else /* Assume IDT monitor by default. */
1350 mips_send_command ("db tty0\r", 0);
1352 gdb_usleep (1000000);
1353 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1355 /* We don't need to absorb any spurious characters here, since the
1356 mips_receive_header will eat up a reasonable number of characters
1357 whilst looking for the SYN, however this avoids the "garbage"
1358 being displayed to the user. */
1359 if (mips_monitor != MON_IDT)
1363 char buff[DATA_MAXLEN + 1];
1365 if (mips_receive_packet (buff, 1, 3) < 0)
1366 mips_error (_("Failed to initialize (didn't receive packet)."));
1370 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1373 mips_exit_debug (void)
1376 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1380 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1382 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1383 so we do not get a reply to this command: */
1384 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1385 mips_need_reply = 0;
1386 if (!mips_expect (" break!"))
1388 do_cleanups (old_cleanups);
1393 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1395 if (!mips_expect (mips_monitor_prompt))
1397 do_cleanups (old_cleanups);
1401 do_cleanups (old_cleanups);
1406 /* Initialize a new connection to the MIPS board, and make sure we are
1407 really connected. */
1410 mips_initialize (void)
1413 struct cleanup *old_cleanups;
1416 /* What is this code doing here? I don't see any way it can happen, and
1417 it might mean mips_initializing didn't get cleared properly.
1418 So I'll make it a warning. */
1420 if (mips_initializing)
1422 warning (_("internal error: mips_initialize called twice"));
1426 old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1429 mips_initializing = 1;
1431 /* At this point, the packit protocol isn't responding. We'll try getting
1432 into the monitor, and restarting the protocol. */
1434 /* Force the system into the monitor. After this we *should* be at
1435 the mips_monitor_prompt. */
1436 if (mips_monitor != MON_IDT)
1437 j = 0; /* Start by checking if we are already
1440 j = 1; /* Start by sending a break. */
1445 case 0: /* First, try sending a CR. */
1446 serial_flush_input (mips_desc);
1447 serial_write (mips_desc, "\r", 1);
1449 case 1: /* First, try sending a break. */
1450 serial_send_break (mips_desc);
1452 case 2: /* Then, try a ^C. */
1453 serial_write (mips_desc, "\003", 1);
1455 case 3: /* Then, try escaping from download. */
1457 if (mips_monitor != MON_IDT)
1461 /* We shouldn't need to send multiple termination
1462 sequences, since the target performs line (or
1463 block) reads, and then processes those
1464 packets. In-case we were downloading a large packet
1465 we flush the output buffer before inserting a
1466 termination sequence. */
1467 serial_flush_output (mips_desc);
1468 sprintf (tbuff, "\r/E/E\r");
1469 serial_write (mips_desc, tbuff, 6);
1476 /* We are possibly in binary download mode, having
1477 aborted in the middle of an S-record. ^C won't
1478 work because of binary mode. The only reliable way
1479 out is to send enough termination packets (8 bytes)
1480 to fill up and then overflow the largest size
1481 S-record (255 bytes in this case). This amounts to
1482 256/8 + 1 packets. */
1484 mips_make_srec (srec, '7', 0, NULL, 0);
1486 for (i = 1; i <= 33; i++)
1488 serial_write (mips_desc, srec, 8);
1490 if (serial_readchar (mips_desc, 0) >= 0)
1491 break; /* Break immediatly if we get something from
1498 mips_error (_("Failed to initialize."));
1501 if (mips_expect (mips_monitor_prompt))
1505 if (mips_monitor != MON_IDT)
1507 /* Sometimes PMON ignores the first few characters in the first
1508 command sent after a load. Sending a blank command gets
1510 mips_send_command ("\r", -1);
1512 /* Ensure the correct target state: */
1513 if (mips_monitor != MON_LSI)
1514 mips_send_command ("set regsize 64\r", -1);
1515 mips_send_command ("set hostport tty0\r", -1);
1516 mips_send_command ("set brkcmd \"\"\r", -1);
1517 /* Delete all the current breakpoints: */
1518 mips_send_command ("db *\r", -1);
1519 /* NOTE: PMON does not have breakpoint support through the
1520 "debug" mode, only at the monitor command-line. */
1523 mips_enter_debug ();
1525 /* Clear all breakpoints: */
1526 if ((mips_monitor == MON_IDT
1527 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1528 || mips_monitor == MON_LSI)
1529 monitor_supports_breakpoints = 1;
1531 monitor_supports_breakpoints = 0;
1533 do_cleanups (old_cleanups);
1535 /* If this doesn't call error, we have connected; we don't care if
1536 the request itself succeeds or fails. */
1538 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1541 /* Open a connection to the remote board. */
1544 common_open (struct target_ops *ops, char *name, int from_tty,
1545 enum mips_monitor_type new_monitor,
1546 const char *new_monitor_prompt)
1548 char *serial_port_name;
1549 char *remote_name = 0;
1550 char *local_name = 0;
1552 struct cleanup *cleanup;
1556 To open a MIPS remote debugging connection, you need to specify what\n\
1557 serial device is attached to the target board (e.g., /dev/ttya).\n\
1558 If you want to use TFTP to download to the board, specify the name of a\n\
1559 temporary file to be used by GDB for downloads as the second argument.\n\
1560 This filename must be in the form host:filename, where host is the name\n\
1561 of the host running the TFTP server, and the file must be readable by the\n\
1562 world. If the local name of the temporary file differs from the name as\n\
1563 seen from the board via TFTP, specify that name as the third parameter.\n"));
1565 /* Parse the serial port name, the optional TFTP name, and the
1566 optional local TFTP name. */
1567 argv = gdb_buildargv (name);
1568 cleanup = make_cleanup_freeargv (argv);
1570 serial_port_name = xstrdup (argv[0]);
1571 if (argv[1]) /* Remote TFTP name specified? */
1573 remote_name = argv[1];
1574 if (argv[2]) /* Local TFTP filename specified? */
1575 local_name = argv[2];
1578 target_preopen (from_tty);
1581 unpush_target (current_ops);
1583 /* Open and initialize the serial port. */
1584 mips_desc = serial_open (serial_port_name);
1585 if (mips_desc == NULL)
1586 perror_with_name (serial_port_name);
1588 if (baud_rate != -1)
1590 if (serial_setbaudrate (mips_desc, baud_rate))
1592 serial_close (mips_desc);
1593 perror_with_name (serial_port_name);
1597 serial_raw (mips_desc);
1599 /* Open and initialize the optional download port. If it is in the form
1600 hostname#portnumber, it's a UDP socket. If it is in the form
1601 hostname:filename, assume it's the TFTP filename that must be
1602 passed to the DDB board to tell it where to get the load file. */
1605 if (strchr (remote_name, '#'))
1607 udp_desc = serial_open (remote_name);
1609 perror_with_name (_("Unable to open UDP port"));
1614 /* Save the remote and local names of the TFTP temp file. If
1615 the user didn't specify a local name, assume it's the same
1616 as the part of the remote name after the "host:". */
1620 xfree (tftp_localname);
1621 if (local_name == NULL)
1622 if ((local_name = strchr (remote_name, ':')) != NULL)
1623 local_name++; /* Skip over the colon. */
1624 if (local_name == NULL)
1625 local_name = remote_name; /* Local name same as remote name. */
1626 tftp_name = xstrdup (remote_name);
1627 tftp_localname = xstrdup (local_name);
1635 /* Reset the expected monitor prompt if it's never been set before. */
1636 if (mips_monitor_prompt == NULL)
1637 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1638 mips_monitor = new_monitor;
1643 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1645 /* Switch to using remote target now. */
1648 inferior_ptid = remote_mips_ptid;
1649 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1650 add_thread_silent (inferior_ptid);
1652 /* Try to figure out the processor model if possible. */
1653 deprecated_mips_set_processor_regs_hack ();
1655 /* This is really the job of start_remote however, that makes an
1656 assumption that the target is about to print out a status message
1657 of some sort. That doesn't happen here (in fact, it may not be
1658 possible to get the monitor to send the appropriate packet). */
1660 reinit_frame_cache ();
1661 registers_changed ();
1662 stop_pc = regcache_read_pc (get_current_regcache ());
1663 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
1664 xfree (serial_port_name);
1666 do_cleanups (cleanup);
1669 /* Open a connection to an IDT board. */
1672 mips_open (char *name, int from_tty)
1674 const char *monitor_prompt = NULL;
1675 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1676 && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips)
1678 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach)
1680 case bfd_mach_mips4100:
1681 case bfd_mach_mips4300:
1682 case bfd_mach_mips4600:
1683 case bfd_mach_mips4650:
1684 case bfd_mach_mips5000:
1685 monitor_prompt = "<RISQ> ";
1689 if (monitor_prompt == NULL)
1690 monitor_prompt = "<IDT>";
1691 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1694 /* Open a connection to a PMON board. */
1697 pmon_open (char *name, int from_tty)
1699 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1702 /* Open a connection to a DDB board. */
1705 ddb_open (char *name, int from_tty)
1707 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1710 /* Open a connection to a rockhopper board. */
1713 rockhopper_open (char *name, int from_tty)
1715 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1718 /* Open a connection to an LSI board. */
1721 lsi_open (char *name, int from_tty)
1725 /* Clear the LSI breakpoint table. */
1726 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1727 lsi_breakpoints[i].type = BREAK_UNUSED;
1729 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1732 /* Close a connection to the remote board. */
1735 mips_close (struct target_ops *self)
1739 /* Get the board out of remote debugging mode. */
1740 (void) mips_exit_debug ();
1745 generic_mourn_inferior ();
1748 /* Detach from the remote board. */
1751 mips_detach (struct target_ops *ops, const char *args, int from_tty)
1754 error (_("Argument given to \"detach\" when remotely debugging."));
1756 unpush_target (ops);
1759 printf_unfiltered ("Ending remote MIPS debugging.\n");
1762 /* Tell the target board to resume. This does not wait for a reply
1763 from the board, except in the case of single-stepping on LSI boards,
1764 where PMON does return a reply. */
1767 mips_resume (struct target_ops *ops,
1768 ptid_t ptid, int step, enum gdb_signal siggnal)
1772 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1773 a single step, so we wait for that. */
1774 mips_request (step ? 's' : 'c', 1, siggnal,
1775 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1776 mips_receive_wait, NULL);
1779 /* Return the signal corresponding to SIG, where SIG is the number which
1780 the MIPS protocol uses for the signal. */
1782 static enum gdb_signal
1783 mips_signal_from_protocol (int sig)
1785 /* We allow a few more signals than the IDT board actually returns, on
1786 the theory that there is at least *some* hope that perhaps the numbering
1787 for these signals is widely agreed upon. */
1790 return GDB_SIGNAL_UNKNOWN;
1792 /* Don't want to use gdb_signal_from_host because we are converting
1793 from MIPS signal numbers, not host ones. Our internal numbers
1794 match the MIPS numbers for the signals the board can return, which
1795 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1796 return (enum gdb_signal) sig;
1799 /* Set the register designated by REGNO to the value designated by VALUE. */
1802 mips_set_register (int regno, ULONGEST value)
1804 gdb_byte buf[MAX_REGISTER_SIZE];
1805 struct regcache *regcache = get_current_regcache ();
1806 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1807 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1809 /* We got the number the register holds, but gdb expects to see a
1810 value in the target byte ordering. */
1812 if (mips_monitor != MON_ROCKHOPPER
1813 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1814 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1815 In such cases we can only really debug 32-bit code properly so,
1816 when reading a GPR or the PC, assume that the full 64-bit
1817 value is the sign extension of the lower 32 bits. */
1818 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1821 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1824 regcache_raw_supply (regcache, regno, buf);
1827 /* Wait until the remote stops, and return a wait status. */
1830 mips_wait (struct target_ops *ops,
1831 ptid_t ptid, struct target_waitstatus *status, int options)
1835 char buff[DATA_MAXLEN];
1836 ULONGEST rpc, rfp, rsp;
1837 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1840 interrupt_count = 0;
1843 /* If we have not sent a single step or continue command, then the
1844 board is waiting for us to do something. Return a status
1845 indicating that it is stopped. */
1846 if (!mips_need_reply)
1848 status->kind = TARGET_WAITKIND_STOPPED;
1849 status->value.sig = GDB_SIGNAL_TRAP;
1850 return inferior_ptid;
1853 /* No timeout; we sit here as long as the program continues to execute. */
1855 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1858 mips_error (_("Remote failure: %s"), safe_strerror (errno));
1860 /* On returning from a continue, the PMON monitor seems to start
1861 echoing back the messages we send prior to sending back the
1862 ACK. The code can cope with this, but to try and avoid the
1863 unnecessary serial traffic, and "spurious" characters displayed
1864 to the user, we cheat and reset the debug protocol. The problems
1865 seems to be caused by a check on the number of arguments, and the
1866 command length, within the monitor causing it to echo the command
1868 if (mips_monitor == MON_PMON)
1871 mips_enter_debug ();
1874 /* See if we got back extended status. If so, pick out the pc, fp,
1877 nfields = sscanf (buff,
1878 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1879 pc_string, fp_string, sp_string, flags);
1881 && read_hex_value (pc_string, &rpc)
1882 && read_hex_value (fp_string, &rfp)
1883 && read_hex_value (sp_string, &rsp))
1885 struct regcache *regcache = get_current_regcache ();
1886 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1888 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1889 mips_set_register (30, rfp);
1890 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1896 for (i = 0; i <= 2; i++)
1897 if (flags[i] == 'r' || flags[i] == 'w')
1899 else if (flags[i] == '\000')
1904 if (strcmp (target_shortname, "lsi") == 0)
1907 /* If this is an LSI PMON target, see if we just hit a
1908 hardrdware watchpoint. Right now, PMON doesn't give us
1909 enough information to determine which breakpoint we hit. So
1910 we have to look up the PC in our own table of breakpoints,
1911 and if found, assume it's just a normal instruction fetch
1912 breakpoint, not a data watchpoint. FIXME when PMON provides
1913 some way to tell us what type of breakpoint it is. */
1915 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1918 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1920 if (lsi_breakpoints[i].addr == pc
1921 && lsi_breakpoints[i].type == BREAK_FETCH)
1928 /* If a data breakpoint was hit, PMON returns the following packet:
1930 The return packet from an ordinary breakpoint doesn't have the
1931 extra 0x01 field tacked onto the end. */
1932 if (nfields == 1 && rpc == 1)
1937 /* NOTE: The following (sig) numbers are defined by PMON:
1938 SPP_SIGTRAP 5 breakpoint
1946 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1947 and so on, because the constants we want here are determined by the
1948 MIPS protocol and have nothing to do with what host we are running on. */
1949 if ((rstatus & 0xff) == 0)
1951 status->kind = TARGET_WAITKIND_EXITED;
1952 status->value.integer = (((rstatus) >> 8) & 0xff);
1954 else if ((rstatus & 0xff) == 0x7f)
1956 status->kind = TARGET_WAITKIND_STOPPED;
1957 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1959 /* If the stop PC is in the _exit function, assume
1960 we hit the 'break 0x3ff' instruction in _exit, so this
1961 is not a normal breakpoint. */
1962 if (strcmp (target_shortname, "lsi") == 0)
1964 const char *func_name;
1965 CORE_ADDR func_start;
1966 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1968 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1969 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1970 && func_start == pc)
1971 status->kind = TARGET_WAITKIND_EXITED;
1976 status->kind = TARGET_WAITKIND_SIGNALLED;
1977 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1980 return inferior_ptid;
1983 /* We have to map between the register numbers used by gdb and the
1984 register numbers used by the debugging protocol. */
1986 #define REGNO_OFFSET 96
1989 mips_map_regno (struct gdbarch *gdbarch, int regno)
1993 if (regno >= mips_regnum (gdbarch)->fp0
1994 && regno < mips_regnum (gdbarch)->fp0 + 32)
1995 return regno - mips_regnum (gdbarch)->fp0 + 32;
1996 else if (regno == mips_regnum (gdbarch)->pc)
1997 return REGNO_OFFSET + 0;
1998 else if (regno == mips_regnum (gdbarch)->cause)
1999 return REGNO_OFFSET + 1;
2000 else if (regno == mips_regnum (gdbarch)->hi)
2001 return REGNO_OFFSET + 2;
2002 else if (regno == mips_regnum (gdbarch)->lo)
2003 return REGNO_OFFSET + 3;
2004 else if (regno == mips_regnum (gdbarch)->fp_control_status)
2005 return REGNO_OFFSET + 4;
2006 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
2007 return REGNO_OFFSET + 5;
2009 /* FIXME: Is there a way to get the status register? */
2013 /* Fetch the remote registers. */
2016 mips_fetch_registers (struct target_ops *ops,
2017 struct regcache *regcache, int regno)
2019 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2020 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2026 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2027 mips_fetch_registers (ops, regcache, regno);
2031 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2032 || regno == MIPS_ZERO_REGNUM)
2033 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2034 supposed to read zero (see also mips-nat.c). */
2038 /* If PMON doesn't support this register, don't waste serial
2039 bandwidth trying to read it. */
2040 int pmon_reg = mips_map_regno (gdbarch, regno);
2042 if (regno != 0 && pmon_reg == 0)
2046 /* Unfortunately the PMON version in the Vr4300 board has been
2047 compiled without the 64bit register access commands. This
2048 means we cannot get hold of the full register width. */
2049 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2050 val = mips_request ('t', pmon_reg, 0,
2051 &err, mips_receive_wait, NULL);
2053 val = mips_request ('r', pmon_reg, 0,
2054 &err, mips_receive_wait, NULL);
2056 mips_error (_("Can't read register %d: %s"), regno,
2057 safe_strerror (errno));
2061 mips_set_register (regno, val);
2064 /* Prepare to store registers. The MIPS protocol can store individual
2065 registers, so this function doesn't have to do anything. */
2068 mips_prepare_to_store (struct target_ops *self, struct regcache *regcache)
2072 /* Store remote register(s). */
2075 mips_store_registers (struct target_ops *ops,
2076 struct regcache *regcache, int regno)
2078 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2084 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2085 mips_store_registers (ops, regcache, regno);
2089 regcache_cooked_read_unsigned (regcache, regno, &val);
2090 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2091 mips_map_regno (gdbarch, regno),
2093 &err, mips_receive_wait, NULL);
2095 mips_error (_("Can't write register %d: %s"), regno,
2096 safe_strerror (errno));
2099 /* Fetch a word from the target board. Return word fetched in location
2100 addressed by VALP. Return 0 when successful; return positive error
2104 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2108 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2111 /* Data space failed; try instruction space. */
2112 *valp = mips_request ('i', addr, 0, &err,
2113 mips_receive_wait, NULL);
2118 /* Store a word to the target board. Returns errno code or zero for
2119 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2120 memory location there. */
2122 /* FIXME! make sure only 32-bit quantities get stored! */
2124 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2127 unsigned int oldcontents;
2129 oldcontents = mips_request ('D', addr, val, &err,
2130 mips_receive_wait, NULL);
2133 /* Data space failed; try instruction space. */
2134 oldcontents = mips_request ('I', addr, val, &err,
2135 mips_receive_wait, NULL);
2139 if (old_contents != NULL)
2140 *old_contents = oldcontents;
2144 /* Read or write LEN bytes from inferior memory at MEMADDR,
2145 transferring to or from debugger address MYADDR. Write to inferior
2146 if SHOULD_WRITE is nonzero. Returns length of data written or
2147 read; 0 for error. Note that protocol gives us the correct value
2148 for a longword, since it transfers values in ASCII. We want the
2149 byte values, so we have to swap the longword values. */
2151 static int mask_address_p = 1;
2154 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2155 struct mem_attrib *attrib, struct target_ops *target)
2157 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
2164 /* PMON targets do not cope well with 64 bit addresses. Mask the
2165 value down to 32 bits. */
2167 memaddr &= (CORE_ADDR) 0xffffffff;
2169 /* Round starting address down to longword boundary. */
2170 addr = memaddr & ~3;
2171 /* Round ending address up; get number of longwords that makes. */
2172 count = (((memaddr + len) - addr) + 3) / 4;
2173 /* Allocate buffer of that many longwords. */
2174 buffer = alloca (count * 4);
2178 /* Fill start and end extra bytes of buffer with existing data. */
2179 if (addr != memaddr || len < 4)
2183 if (mips_fetch_word (addr, &val))
2186 /* Need part of initial word -- fetch it. */
2187 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2194 /* Need part of last word -- fetch it. FIXME: we do this even
2195 if we don't need it. */
2196 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2199 store_unsigned_integer (&buffer[(count - 1) * 4],
2200 4, byte_order, val);
2203 /* Copy data to be written over corresponding part of buffer. */
2205 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2207 /* Write the entire buffer. */
2209 for (i = 0; i < count; i++, addr += 4)
2213 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2214 status = mips_store_word (addr, word, NULL);
2215 /* Report each kilobyte (we download 32-bit words at a time). */
2218 printf_unfiltered ("*");
2219 gdb_flush (gdb_stdout);
2226 /* FIXME: Do we want a QUIT here? */
2229 printf_unfiltered ("\n");
2233 /* Read all the longwords. */
2234 for (i = 0; i < count; i++, addr += 4)
2238 if (mips_fetch_word (addr, &val))
2241 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2245 /* Copy appropriate bytes out of the buffer. */
2246 memcpy (myaddr, buffer + (memaddr & 3), len);
2251 /* Print info on this target. */
2254 mips_files_info (struct target_ops *ignore)
2256 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2259 /* Kill the process running on the board. This will actually only
2260 work if we are doing remote debugging over the console input. I
2261 think that if IDT/sim had the remote debug interrupt enabled on the
2262 right port, we could interrupt the process with a break signal. */
2265 mips_kill (struct target_ops *ops)
2267 if (!mips_wait_flag)
2269 target_mourn_inferior ();
2275 if (interrupt_count >= 2)
2277 interrupt_count = 0;
2279 target_terminal_ours ();
2281 if (query (_("Interrupted while waiting for the program.\n\
2282 Give up (and stop debugging it)? ")))
2284 /* Clean up in such a way that mips_close won't try to talk
2285 to the board (it almost surely won't work since we
2286 weren't able to talk to it). */
2290 printf_unfiltered ("Ending remote MIPS debugging.\n");
2291 target_mourn_inferior ();
2295 target_terminal_inferior ();
2298 if (remote_debug > 0)
2299 printf_unfiltered ("Sending break\n");
2301 serial_send_break (mips_desc);
2303 target_mourn_inferior ();
2312 serial_write (mips_desc, &cc, 1);
2314 target_mourn_inferior ();
2319 /* Start running on the target board. */
2322 mips_create_inferior (struct target_ops *ops, char *execfile,
2323 char *args, char **env, int from_tty)
2330 Can't pass arguments to remote MIPS board; arguments ignored."));
2331 /* And don't try to use them on the next "run" command. */
2332 execute_command ("set args", 0);
2335 if (execfile == 0 || exec_bfd == 0)
2336 error (_("No executable file specified"));
2338 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2340 init_wait_for_inferior ();
2342 regcache_write_pc (get_current_regcache (), entry_pt);
2345 /* Clean up after a process. The bulk of the work is done in mips_close(),
2346 which is called when unpushing the target. */
2349 mips_mourn_inferior (struct target_ops *ops)
2351 if (current_ops != NULL)
2352 unpush_target (current_ops);
2355 /* We can write a breakpoint and read the shadow contents in one
2358 /* Insert a breakpoint. On targets that don't have built-in
2359 breakpoint support, we read the contents of the target location and
2360 stash it, then overwrite it with a breakpoint instruction. ADDR is
2361 the target location in the target machine. BPT is the breakpoint
2362 being inserted or removed, which contains memory for saving the
2366 mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2367 struct bp_target_info *bp_tgt)
2369 if (monitor_supports_breakpoints)
2370 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2373 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
2376 /* Remove a breakpoint. */
2379 mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2380 struct bp_target_info *bp_tgt)
2382 if (monitor_supports_breakpoints)
2383 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2386 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
2389 /* Tell whether this target can support a hardware breakpoint. CNT
2390 is the number of hardware breakpoints already installed. This
2391 implements the target_can_use_hardware_watchpoint macro. */
2394 mips_can_use_watchpoint (int type, int cnt, int othertype)
2396 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2400 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2401 This is used for memory ref breakpoints. */
2403 static unsigned long
2404 calculate_mask (CORE_ADDR addr, int len)
2409 mask = addr ^ (addr + len - 1);
2411 for (i = 32; i >= 0; i--)
2417 mask = (unsigned long) 0xffffffff >> i;
2423 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2424 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2428 mips_insert_watchpoint (CORE_ADDR addr, int len, int type,
2429 struct expression *cond)
2431 if (mips_set_breakpoint (addr, len, type))
2437 /* Remove a watchpoint. */
2440 mips_remove_watchpoint (CORE_ADDR addr, int len, int type,
2441 struct expression *cond)
2443 if (mips_clear_breakpoint (addr, len, type))
2449 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2453 mips_stopped_by_watchpoint (struct target_ops *ops)
2455 return hit_watchpoint;
2459 /* Insert a breakpoint. */
2462 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2464 return mips_common_breakpoint (1, addr, len, type);
2468 /* Clear a breakpoint. */
2471 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2473 return mips_common_breakpoint (0, addr, len, type);
2477 /* Check the error code from the return packet for an LSI breakpoint
2478 command. If there's no error, just return 0. If it's a warning,
2479 print the warning text and return 0. If it's an error, print
2480 the error text and return 1. <ADDR> is the address of the breakpoint
2481 that was being set. <RERRFLG> is the error code returned by PMON.
2482 This is a helper function for mips_common_breakpoint. */
2485 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2487 struct lsi_error *err;
2488 const char *saddr = paddress (target_gdbarch (), addr);
2490 if (rerrflg == 0) /* no error */
2493 /* Warnings can be ORed together, so check them all. */
2494 if (rerrflg & W_WARN)
2496 if (monitor_warnings)
2500 for (err = lsi_warning_table; err->code != 0; err++)
2502 if ((err->code & rerrflg) == err->code)
2505 fprintf_unfiltered (gdb_stderr, "\
2506 mips_common_breakpoint (%s): Warning: %s\n",
2512 fprintf_unfiltered (gdb_stderr, "\
2513 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2520 /* Errors are unique, i.e. can't be ORed together. */
2521 for (err = lsi_error_table; err->code != 0; err++)
2523 if ((err->code & rerrflg) == err->code)
2525 fprintf_unfiltered (gdb_stderr, "\
2526 mips_common_breakpoint (%s): Error: %s\n",
2532 fprintf_unfiltered (gdb_stderr, "\
2533 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2540 /* This routine sends a breakpoint command to the remote target.
2542 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2543 <ADDR> is the address of the breakpoint.
2544 <LEN> the length of the region to break on.
2545 <TYPE> is the type of breakpoint:
2546 0 = write (BREAK_WRITE)
2547 1 = read (BREAK_READ)
2548 2 = read/write (BREAK_ACCESS)
2549 3 = instruction fetch (BREAK_FETCH)
2551 Return 0 if successful; otherwise 1. */
2554 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2556 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
2557 char buf[DATA_MAXLEN + 1];
2559 int rpid, rerrflg, rresponse, rlen;
2562 addr = gdbarch_addr_bits_remove (target_gdbarch (), addr);
2564 if (mips_monitor == MON_LSI)
2566 if (set == 0) /* clear breakpoint */
2568 /* The LSI PMON "clear breakpoint" has this form:
2569 <pid> 'b' <bptn> 0x0
2571 <pid> 'b' 0x0 <code>
2573 <bptn> is a breakpoint number returned by an earlier 'B' command.
2574 Possible return codes: OK, E_BPT. */
2578 /* Search for the breakpoint in the table. */
2579 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2580 if (lsi_breakpoints[i].type == type
2581 && lsi_breakpoints[i].addr == addr
2582 && lsi_breakpoints[i].len == len)
2585 /* Clear the table entry and tell PMON to clear the breakpoint. */
2586 if (i == MAX_LSI_BREAKPOINTS)
2589 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2590 paddress (target_gdbarch (), addr));
2594 lsi_breakpoints[i].type = BREAK_UNUSED;
2595 sprintf (buf, "0x0 b 0x%x 0x0", i);
2596 mips_send_packet (buf, 1);
2598 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2601 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2603 mips_error (_("mips_common_breakpoint: "
2604 "Bad response from remote board: %s"),
2607 return (mips_check_lsi_error (addr, rerrflg));
2610 /* set a breakpoint */
2612 /* The LSI PMON "set breakpoint" command has this form:
2613 <pid> 'B' <addr> 0x0
2615 <pid> 'B' <bptn> <code>
2617 The "set data breakpoint" command has this form:
2619 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2621 where: type= "0x1" = read
2623 "0x3" = access (read or write)
2625 The reply returns two values:
2626 bptn - a breakpoint number, which is a small integer with
2627 possible values of zero through 255.
2628 code - an error return code, a value of zero indicates a
2629 succesful completion, other values indicate various
2630 errors and warnings.
2632 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2634 if (type == BREAK_FETCH) /* instruction breakpoint */
2637 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2643 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2644 phex_nz (addr, addr_size),
2645 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2646 phex_nz (addr + len - 1, addr_size));
2648 mips_send_packet (buf, 1);
2650 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2653 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2654 &rpid, &rcmd, &rresponse, &rerrflg);
2655 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2656 mips_error (_("mips_common_breakpoint: "
2657 "Bad response from remote board: %s"),
2661 if (mips_check_lsi_error (addr, rerrflg))
2664 /* rresponse contains PMON's breakpoint number. Record the
2665 information for this breakpoint so we can clear it later. */
2666 lsi_breakpoints[rresponse].type = type;
2667 lsi_breakpoints[rresponse].addr = addr;
2668 lsi_breakpoints[rresponse].len = len;
2675 /* On non-LSI targets, the breakpoint command has this form:
2676 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2677 <MASK> is a don't care mask for addresses.
2678 <FLAGS> is any combination of `r', `w', or `f' for
2679 read/write/fetch. */
2683 mask = calculate_mask (addr, len);
2686 if (set) /* set a breakpoint */
2692 case BREAK_WRITE: /* write */
2695 case BREAK_READ: /* read */
2698 case BREAK_ACCESS: /* read/write */
2701 case BREAK_FETCH: /* fetch */
2705 internal_error (__FILE__, __LINE__,
2706 _("failed internal consistency check"));
2710 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2711 phex_nz (mask, addr_size), flags);
2716 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2719 mips_send_packet (buf, 1);
2721 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2724 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2725 &rpid, &rcmd, &rerrflg, &rresponse);
2727 if (nfields != 4 || rcmd != cmd)
2728 mips_error (_("mips_common_breakpoint: "
2729 "Bad response from remote board: %s"),
2734 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2735 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2736 if (mips_monitor == MON_DDB)
2737 rresponse = rerrflg;
2738 if (rresponse != 22) /* invalid argument */
2739 fprintf_unfiltered (gdb_stderr, "\
2740 mips_common_breakpoint (%s): Got error: 0x%x\n",
2741 paddress (target_gdbarch (), addr), rresponse);
2748 /* Send one S record as specified by SREC of length LEN, starting
2749 at ADDR. Note, however, that ADDR is not used except to provide
2750 a useful message to the user in the event that a NACK is received
2754 send_srec (char *srec, int len, CORE_ADDR addr)
2760 serial_write (mips_desc, srec, len);
2762 ch = mips_readchar (remote_timeout);
2766 case SERIAL_TIMEOUT:
2767 error (_("Timeout during download."));
2771 case 0x15: /* NACK */
2772 fprintf_unfiltered (gdb_stderr,
2773 "Download got a NACK at byte %s! Retrying.\n",
2774 paddress (target_gdbarch (), addr));
2777 error (_("Download got unexpected ack char: 0x%x, retrying."),
2783 /* Download a binary file by converting it to S records. */
2786 mips_load_srec (char *args)
2793 unsigned int srec_frame = 200;
2795 struct cleanup *cleanup;
2796 static int hashmark = 1;
2798 buffer = alloca (srec_frame * 2 + 256);
2800 abfd = gdb_bfd_open (args, NULL, -1);
2803 printf_filtered ("Unable to open file %s\n", args);
2807 cleanup = make_cleanup_bfd_unref (abfd);
2808 if (bfd_check_format (abfd, bfd_object) == 0)
2810 printf_filtered ("File is not an object file\n");
2811 do_cleanups (cleanup);
2815 /* This actually causes a download in the IDT binary format: */
2816 mips_send_command (LOAD_CMD, 0);
2818 for (s = abfd->sections; s; s = s->next)
2820 if (s->flags & SEC_LOAD)
2822 unsigned int numbytes;
2824 /* FIXME! vma too small????? */
2825 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2827 (long) (s->vma + bfd_get_section_size (s)));
2828 gdb_flush (gdb_stdout);
2830 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2832 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2834 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2836 reclen = mips_make_srec (srec, '3', s->vma + i,
2838 send_srec (srec, reclen, s->vma + i);
2840 if (deprecated_ui_load_progress_hook)
2841 deprecated_ui_load_progress_hook (s->name, i);
2845 putchar_unfiltered ('#');
2846 gdb_flush (gdb_stdout);
2849 } /* Per-packet (or S-record) loop */
2851 putchar_unfiltered ('\n');
2852 } /* Loadable sections */
2855 putchar_unfiltered ('\n');
2857 /* Write a type 7 terminator record. no data for a type 7, and there
2858 is no data, so len is 0. */
2860 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2862 send_srec (srec, reclen, abfd->start_address);
2864 serial_flush_input (mips_desc);
2865 do_cleanups (cleanup);
2869 * mips_make_srec -- make an srecord. This writes each line, one at a
2870 * time, each with it's own header and trailer line.
2871 * An srecord looks like this:
2873 * byte count-+ address
2874 * start ---+ | | data +- checksum
2876 * S01000006F6B692D746573742E73726563E4
2877 * S315000448600000000000000000FC00005900000000E9
2878 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2879 * S30B0004485A0000000000004E
2882 * S<type><length><address><data><checksum>
2886 * is the number of bytes following upto the checksum. Note that
2887 * this is not the number of chars following, since it takes two
2888 * chars to represent a byte.
2892 * 1) two byte address data record
2893 * 2) three byte address data record
2894 * 3) four byte address data record
2895 * 7) four byte address termination record
2896 * 8) three byte address termination record
2897 * 9) two byte address termination record
2900 * is the start address of the data following, or in the case of
2901 * a termination record, the start address of the image
2905 * is the sum of all the raw byte data in the record, from the length
2906 * upwards, modulo 256 and subtracted from 255.
2908 * This routine returns the length of the S-record.
2913 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2916 unsigned char checksum;
2919 /* Create the header for the srec. addr_size is the number of bytes
2920 in the address, and 1 is the number of bytes in the count. */
2922 /* FIXME!! bigger buf required for 64-bit! */
2925 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2926 /* This assumes S3 style downloads (4byte addresses). There should
2927 probably be a check, or the code changed to make it more
2929 buf[3] = memaddr >> 24;
2930 buf[4] = memaddr >> 16;
2931 buf[5] = memaddr >> 8;
2933 memcpy (&buf[7], myaddr, len);
2935 /* Note that the checksum is calculated on the raw data, not the
2936 hexified data. It includes the length, address and the data
2937 portions of the packet. */
2939 buf += 2; /* Point at length byte. */
2940 for (i = 0; i < len + 4 + 1; i++)
2948 /* The following manifest controls whether we enable the simple flow
2949 control support provided by the monitor. If enabled the code will
2950 wait for an affirmative ACK between transmitting packets. */
2951 #define DOETXACK (1)
2953 /* The PMON fast-download uses an encoded packet format constructed of
2954 3byte data packets (encoded as 4 printable ASCII characters), and
2955 escape sequences (preceded by a '/'):
2958 'C' compare checksum (12bit value, not included in checksum calculation)
2959 'S' define symbol name (for addr) terminated with ","
2960 and padded to 4char boundary
2961 'Z' zero fill multiple of 3bytes
2962 'B' byte (12bit encoded value, of 8bit data)
2963 'A' address (36bit encoded value)
2964 'E' define entry as original address, and exit load
2966 The packets are processed in 4 character chunks, so the escape
2967 sequences that do not have any data (or variable length data)
2968 should be padded to a 4 character boundary. The decoder will give
2969 an error if the complete message block size is not a multiple of
2970 4bytes (size of record).
2972 The encoding of numbers is done in 6bit fields. The 6bit value is
2973 used to index into this string to get the specific character
2974 encoding for the value: */
2975 static char encoding[] =
2976 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2978 /* Convert the number of bits required into an encoded number, 6bits
2979 at a time (range 0..63). Keep a checksum if required (passed
2980 pointer non-NULL). The function returns the number of encoded
2981 characters written into the buffer. */
2984 pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum)
2986 int count = (n / 6);
2990 fprintf_unfiltered (gdb_stderr,
2991 "Fast encoding bitcount must be a "
2992 "multiple of 12bits: %dbit%s\n",
2993 n, (n == 1) ? "" : "s");
2998 fprintf_unfiltered (gdb_stderr,
2999 "Fast encoding cannot process more "
3000 "than 36bits at the moment: %dbits\n", n);
3004 /* Deal with the checksum: */
3010 *chksum += ((v >> 24) & 0xFFF);
3012 *chksum += ((v >> 12) & 0xFFF);
3014 *chksum += ((v >> 0) & 0xFFF);
3021 *p++ = encoding[(v >> n) & 0x3F];
3028 /* Shorthand function (that could be in-lined) to output the zero-fill
3029 escape sequence into the data stream. */
3032 pmon_zeroset (int recsize, char **buff,
3033 unsigned int *amount, unsigned int *chksum)
3037 sprintf (*buff, "/Z");
3038 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3039 *buff += (count + 2);
3041 return (recsize + count + 2);
3044 /* Add the checksum specified by *VALUE to end of the record under
3045 construction. *BUF specifies the location at which to begin
3046 writing characters comprising the checksum information. RECSIZE
3047 specifies the size of the record constructed thus far. (A trailing
3048 NUL character may be present in the buffer holding the record, but
3049 the record size does not include this character.)
3051 Return the total size of the record after adding the checksum escape,
3052 the checksum itself, and the trailing newline.
3054 The checksum specified by *VALUE is zeroed out prior to returning.
3055 Additionally, *BUF is updated to refer to the location just beyond
3056 the record elements added by this call. */
3059 pmon_checkset (int recsize, char **buff, unsigned int *value)
3063 /* Add the checksum (without updating the value): */
3064 sprintf (*buff, "/C");
3065 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3066 *buff += (count + 2);
3067 sprintf (*buff, "\n");
3068 *buff += 2; /* Include zero terminator. */
3069 /* Forcing a checksum validation clears the sum: */
3071 return (recsize + count + 3);
3074 /* Amount of padding we leave after at the end of the output buffer,
3075 for the checksum and line termination characters: */
3076 #define CHECKSIZE (4 + 4 + 4 + 2)
3077 /* zero-fill, checksum, transfer end and line termination space. */
3079 /* The amount of binary data loaded from the object file in a single
3081 #define BINCHUNK (1024)
3083 /* Maximum line of data accepted by the monitor: */
3084 #define MAXRECSIZE (550)
3085 /* NOTE: This constant depends on the monitor being used. This value
3086 is for PMON 5.x on the Cogent Vr4300 board. */
3088 /* Create a FastLoad format record.
3090 *OUTBUF is the buffer into which a FastLoad formatted record is
3091 written. On return, the pointer position represented by *OUTBUF
3092 is updated to point at the end of the data, i.e. the next position
3093 in the buffer that may be written. No attempt is made to NUL-
3094 terminate this portion of the record written to the buffer.
3096 INBUF contains the binary input data from which the FastLoad
3097 formatted record will be built. *INPTR is an index into this
3098 buffer. *INPTR is updated as the input is consumed. Thus, on
3099 return, the caller has access to the position of the next input
3100 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3103 *RECSIZE will be written with the size of the record written to the
3104 output buffer prior to returning. This size does not include a
3105 NUL-termination byte as none is written to the output buffer.
3107 *CSUM is the output buffer checksum. It is updated as data is
3108 written to the output buffer.
3110 *ZEROFILL is the current number of 3-byte zero sequences that have
3111 been encountered. It is both an input and an output to this
3115 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3116 int inamount, int *recsize, unsigned int *csum,
3117 unsigned int *zerofill)
3122 /* This is a simple check to ensure that our data will fit within
3123 the maximum allowable record size. Each record output is 4bytes
3124 in length. We must allow space for a pending zero fill command,
3125 the record, and a checksum record. */
3126 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3128 /* Process the binary data: */
3129 if ((inamount - *inptr) < 3)
3132 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3134 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3136 *recsize += (2 + count);
3141 unsigned int value = ((inbuf[*inptr + 0] << 16)
3142 | (inbuf[*inptr + 1] << 8)
3143 | (inbuf[*inptr + 2]));
3145 /* Simple check for zero data. TODO: A better check would be
3146 to check the last, and then the middle byte for being zero
3147 (if the first byte is not). We could then check for
3148 following runs of zeros, and if above a certain size it is
3149 worth the 4 or 8 character hit of the byte insertions used
3150 to pad to the start of the zeroes. NOTE: This also depends
3151 on the alignment at the end of the zero run. */
3152 if (value == 0x00000000)
3155 if (*zerofill == 0xFFF) /* 12bit counter */
3156 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3161 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3162 count = pmon_makeb64 (value, p, 24, csum);
3174 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3175 output the message specified by MESG. Return -1 for failure, 0
3179 pmon_check_ack (char *mesg)
3181 #if defined(DOETXACK)
3186 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3188 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3190 fprintf_unfiltered (gdb_stderr,
3191 "Failed to receive valid ACK for %s\n", mesg);
3192 return (-1); /* Terminate the download. */
3195 #endif /* DOETXACK */
3199 /* pmon_download - Send a sequence of characters to the PMON download port,
3200 which is either a serial port or a UDP socket. */
3203 pmon_start_download (void)
3207 /* Create the temporary download file. */
3208 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3209 perror_with_name (tftp_localname);
3213 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3214 mips_expect ("Downloading from ");
3215 mips_expect (udp_in_use ? "udp" : "tty0");
3216 mips_expect (", ^C to abort\r\n");
3220 /* Look for the string specified by STRING sent from the target board
3221 during a download operation. If the string in question is not
3222 seen, output an error message, remove the temporary file, if
3223 appropriate, and return 0. Otherwise, return 1 to indicate
3227 mips_expect_download (char *string)
3229 if (!mips_expect (string))
3231 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3233 remove (tftp_localname); /* Remove temporary file. */
3240 /* Look for messages from the target board associated with the entry
3243 NOTE: This function doesn't indicate success or failure, so we
3244 have no way to determine whether or not the output from the board
3245 was correctly seen. However, given that other items are checked
3246 after this, it seems unlikely that those checks will pass if this
3247 check doesn't first (silently) pass. */
3250 pmon_check_entry_address (char *entry_address, int final)
3252 char hexnumber[9]; /* Includes '\0' space. */
3254 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3255 sprintf (hexnumber, "%x", final);
3256 mips_expect (hexnumber);
3257 mips_expect ("\r\n");
3260 /* Look for messages from the target board showing the total number of
3261 bytes downloaded to the board. Output 1 for success if the tail
3262 end of the message was read correctly, 0 otherwise. */
3265 pmon_check_total (int bintotal)
3267 char hexnumber[9]; /* Includes '\0' space. */
3269 mips_expect ("\r\ntotal = 0x");
3270 sprintf (hexnumber, "%x", bintotal);
3271 mips_expect (hexnumber);
3272 return mips_expect_download (" bytes\r\n");
3275 /* Look for the termination messages associated with the end of
3276 a download to the board.
3278 Also, when `tftp_in_use' is set, issue the load command to the
3279 board causing the file to be transferred. (This is done prior
3280 to looking for the above mentioned termination messages.) */
3283 pmon_end_download (int final, int bintotal)
3285 char hexnumber[9]; /* Includes '\0' space. */
3289 static char *load_cmd_prefix = "load -b -s ";
3293 /* Close off the temporary file containing the load data. */
3297 /* Make the temporary file readable by the world. */
3298 if (stat (tftp_localname, &stbuf) == 0)
3299 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3301 /* Must reinitialize the board to prevent PMON from crashing. */
3302 if (mips_monitor != MON_ROCKHOPPER)
3303 mips_send_command ("initEther\r", -1);
3305 /* Send the load command. */
3306 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3307 strcpy (cmd, load_cmd_prefix);
3308 strcat (cmd, tftp_name);
3310 mips_send_command (cmd, 0);
3312 if (!mips_expect_download ("Downloading from "))
3314 if (!mips_expect_download (tftp_name))
3316 if (!mips_expect_download (", ^C to abort\r\n"))
3320 /* Wait for the stuff that PMON prints after the load has completed.
3321 The timeout value for use in the tftp case (15 seconds) was picked
3322 arbitrarily but might be too small for really large downloads. FIXME. */
3323 switch (mips_monitor)
3326 pmon_check_ack ("termination");
3327 pmon_check_entry_address ("Entry address is ", final);
3328 if (!pmon_check_total (bintotal))
3331 case MON_ROCKHOPPER:
3332 if (!pmon_check_total (bintotal))
3334 pmon_check_entry_address ("Entry Address = ", final);
3337 pmon_check_entry_address ("Entry Address = ", final);
3338 pmon_check_ack ("termination");
3339 if (!pmon_check_total (bintotal))
3345 remove (tftp_localname); /* Remove temporary file. */
3348 /* Write the buffer specified by BUFFER of length LENGTH to either
3349 the board or the temporary file that'll eventually be transferred
3353 pmon_download (char *buffer, int length)
3359 written = fwrite (buffer, 1, length, tftp_file);
3360 if (written < length)
3361 perror_with_name (tftp_localname);
3364 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3367 /* Open object or executable file, FILE, and send it to the board
3368 using the FastLoad format. */
3371 pmon_load_fast (char *file)
3375 unsigned char *binbuf;
3378 unsigned int csum = 0;
3379 int hashmark = !tftp_in_use;
3383 struct cleanup *cleanup;
3385 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3386 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3388 abfd = gdb_bfd_open (file, NULL, -1);
3391 printf_filtered ("Unable to open file %s\n", file);
3394 cleanup = make_cleanup_bfd_unref (abfd);
3396 if (bfd_check_format (abfd, bfd_object) == 0)
3398 printf_filtered ("File is not an object file\n");
3399 do_cleanups (cleanup);
3403 /* Setup the required download state: */
3404 mips_send_command ("set dlproto etxack\r", -1);
3405 mips_send_command ("set dlecho off\r", -1);
3406 /* NOTE: We get a "cannot set variable" message if the variable is
3407 already defined to have the argument we give. The code doesn't
3408 care, since it just scans to the next prompt anyway. */
3409 /* Start the download: */
3410 pmon_start_download ();
3412 /* Zero the checksum. */
3413 sprintf (buffer, "/Kxx\n");
3414 reclen = strlen (buffer);
3415 pmon_download (buffer, reclen);
3416 finished = pmon_check_ack ("/Kxx");
3418 for (s = abfd->sections; s && !finished; s = s->next)
3419 if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */
3421 bintotal += bfd_get_section_size (s);
3422 final = (s->vma + bfd_get_section_size (s));
3424 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name,
3425 (unsigned int) s->vma,
3426 (unsigned int) (s->vma + bfd_get_section_size (s)));
3427 gdb_flush (gdb_stdout);
3429 /* Output the starting address. */
3430 sprintf (buffer, "/A");
3431 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3432 buffer[2 + reclen] = '\n';
3433 buffer[3 + reclen] = '\0';
3434 reclen += 3; /* For the initial escape code and carriage return. */
3435 pmon_download (buffer, reclen);
3436 finished = pmon_check_ack ("/A");
3440 unsigned int binamount;
3441 unsigned int zerofill = 0;
3448 i < bfd_get_section_size (s) && !finished;
3453 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3455 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3457 /* This keeps a rolling checksum, until we decide to output
3459 for (; ((binamount - binptr) > 0);)
3461 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3462 &reclen, &csum, &zerofill);
3463 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3465 reclen = pmon_checkset (reclen, &bp, &csum);
3466 pmon_download (buffer, reclen);
3467 finished = pmon_check_ack ("data record");
3470 zerofill = 0; /* Do not transmit pending
3475 if (deprecated_ui_load_progress_hook)
3476 deprecated_ui_load_progress_hook (s->name, i);
3480 putchar_unfiltered ('#');
3481 gdb_flush (gdb_stdout);
3485 reclen = 0; /* buffer processed */
3490 /* Ensure no out-standing zerofill requests: */
3492 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3494 /* and then flush the line: */
3497 reclen = pmon_checkset (reclen, &bp, &csum);
3498 /* Currently pmon_checkset outputs the line terminator by
3499 default, so we write out the buffer so far: */
3500 pmon_download (buffer, reclen);
3501 finished = pmon_check_ack ("record remnant");
3505 putchar_unfiltered ('\n');
3508 /* Terminate the transfer. We know that we have an empty output
3509 buffer at this point. */
3510 sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */
3511 reclen = strlen (buffer);
3512 pmon_download (buffer, reclen);
3515 { /* Ignore the termination message: */
3516 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3519 { /* Deal with termination message: */
3520 pmon_end_download (final, bintotal);
3523 do_cleanups (cleanup);
3527 /* mips_load -- download a file. */
3530 mips_load (char *file, int from_tty)
3532 struct regcache *regcache;
3534 /* Get the board out of remote debugging mode. */
3535 if (mips_exit_debug ())
3536 error (_("mips_load: Couldn't get into monitor mode."));
3538 if (mips_monitor != MON_IDT)
3539 pmon_load_fast (file);
3541 mips_load_srec (file);
3545 /* Finally, make the PC point at the start address. */
3546 regcache = get_current_regcache ();
3547 if (mips_monitor != MON_IDT)
3549 /* Work around problem where PMON monitor updates the PC after a load
3550 to a different value than GDB thinks it has. The following ensures
3551 that the regcache_write_pc() WILL update the PC value: */
3552 regcache_invalidate (regcache,
3553 mips_regnum (get_regcache_arch (regcache))->pc);
3556 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3559 /* Check to see if a thread is still alive. */
3562 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3564 if (ptid_equal (ptid, remote_mips_ptid))
3565 /* The monitor's task is always alive. */
3571 /* Convert a thread ID to a string. Returns the string in a static
3575 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3577 static char buf[64];
3579 if (ptid_equal (ptid, remote_mips_ptid))
3581 xsnprintf (buf, sizeof buf, "Thread <main>");
3585 return normal_pid_to_str (ptid);
3588 /* Pass the command argument as a packet to PMON verbatim. */
3591 pmon_command (char *args, int from_tty)
3593 char buf[DATA_MAXLEN + 1];
3596 sprintf (buf, "0x0 %s", args);
3597 mips_send_packet (buf, 1);
3598 printf_filtered ("Send packet: %s\n", buf);
3600 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3602 printf_filtered ("Received packet: %s\n", buf);
3605 /* -Wmissing-prototypes */
3606 extern initialize_file_ftype _initialize_remote_mips;
3608 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3609 Create target specific commands and perform other initializations
3610 specific to this file. */
3613 _initialize_remote_mips (void)
3615 /* Initialize the fields in mips_ops that are common to all four targets. */
3616 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3617 mips_ops.to_close = mips_close;
3618 mips_ops.to_detach = mips_detach;
3619 mips_ops.to_resume = mips_resume;
3620 mips_ops.to_fetch_registers = mips_fetch_registers;
3621 mips_ops.to_store_registers = mips_store_registers;
3622 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3623 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3624 mips_ops.to_files_info = mips_files_info;
3625 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3626 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3627 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3628 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3629 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3630 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3631 mips_ops.to_kill = mips_kill;
3632 mips_ops.to_load = mips_load;
3633 mips_ops.to_create_inferior = mips_create_inferior;
3634 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3635 mips_ops.to_thread_alive = mips_thread_alive;
3636 mips_ops.to_pid_to_str = mips_pid_to_str;
3637 mips_ops.to_log_command = serial_log_command;
3638 mips_ops.to_stratum = process_stratum;
3639 mips_ops.to_has_all_memory = default_child_has_all_memory;
3640 mips_ops.to_has_memory = default_child_has_memory;
3641 mips_ops.to_has_stack = default_child_has_stack;
3642 mips_ops.to_has_registers = default_child_has_registers;
3643 mips_ops.to_has_execution = default_child_has_execution;
3644 mips_ops.to_magic = OPS_MAGIC;
3646 /* Copy the common fields to all four target vectors. */
3647 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3649 /* Initialize target-specific fields in the target vectors. */
3650 mips_ops.to_shortname = "mips";
3651 mips_ops.to_doc = "\
3652 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3653 The argument is the device it is connected to or, if it contains a colon,\n\
3654 HOST:PORT to access a board over a network";
3655 mips_ops.to_open = mips_open;
3656 mips_ops.to_wait = mips_wait;
3658 pmon_ops.to_shortname = "pmon";
3659 pmon_ops.to_doc = "\
3660 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3661 line. The argument is the device it is connected to or, if it contains a\n\
3662 colon, HOST:PORT to access a board over a network";
3663 pmon_ops.to_open = pmon_open;
3664 pmon_ops.to_wait = mips_wait;
3666 ddb_ops.to_shortname = "ddb";
3668 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3669 line. The first argument is the device it is connected to or, if it contains\n\
3670 a colon, HOST:PORT to access a board over a network. The optional second\n\
3671 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3672 TFTP downloads to the board. The optional third parameter is the local name\n\
3673 of the TFTP temporary file, if it differs from the filename seen by the board.";
3674 ddb_ops.to_open = ddb_open;
3675 ddb_ops.to_wait = mips_wait;
3677 rockhopper_ops.to_shortname = "rockhopper";
3678 rockhopper_ops.to_doc = ddb_ops.to_doc;
3679 rockhopper_ops.to_open = rockhopper_open;
3680 rockhopper_ops.to_wait = mips_wait;
3682 lsi_ops.to_shortname = "lsi";
3683 lsi_ops.to_doc = pmon_ops.to_doc;
3684 lsi_ops.to_open = lsi_open;
3685 lsi_ops.to_wait = mips_wait;
3687 /* Add the targets. */
3688 add_target (&mips_ops);
3689 add_target (&pmon_ops);
3690 add_target (&ddb_ops);
3691 add_target (&lsi_ops);
3692 add_target (&rockhopper_ops);
3694 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3695 Set timeout in seconds for remote MIPS serial I/O."), _("\
3696 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3698 NULL, /* FIXME: i18n: */
3699 &setlist, &showlist);
3701 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3702 &mips_retransmit_wait, _("\
3703 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3704 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3705 This is the number of seconds to wait for an acknowledgement to a packet\n\
3706 before resending the packet."),
3708 NULL, /* FIXME: i18n: */
3709 &setlist, &showlist);
3711 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3712 &mips_syn_garbage, _("\
3713 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3714 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3715 This is the maximum number of characters GDB will ignore when trying to\n\
3716 synchronize with the remote system. A value of -1 means that there is no\n\
3717 limit. (Note that these characters are printed out even though they are\n\
3720 NULL, /* FIXME: i18n: */
3721 &setlist, &showlist);
3723 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3724 &mips_monitor_prompt, _("\
3725 Set the prompt that GDB expects from the monitor."), _("\
3726 Show the prompt that GDB expects from the monitor."), NULL,
3728 NULL, /* FIXME: i18n: */
3729 &setlist, &showlist);
3731 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3732 &monitor_warnings, _("\
3733 Set printing of monitor warnings."), _("\
3734 Show printing of monitor warnings."), _("\
3735 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3737 NULL, /* FIXME: i18n: */
3738 &setlist, &showlist);
3740 add_com ("pmon", class_obscure, pmon_command,
3741 _("Send a packet to PMON (must be in debug mode)."));
3743 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3744 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3745 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3746 Use \"on\" to enable the masking and \"off\" to disable it."),
3748 NULL, /* FIXME: i18n: */
3749 &setlist, &showlist);
3750 remote_mips_ptid = ptid_build (42000, 0, 42000);