1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002 Free Software Foundation, Inc.
6 Contributed by Cygnus Support. Written by Ian Lance Taylor
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
34 #include "remote-utils.h"
35 #include "gdb_string.h"
39 #include "mips-tdep.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 unsigned 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 (int quitting);
89 static void mips_detach (char *args, int from_tty);
91 static void mips_resume (ptid_t ptid, int step,
92 enum target_signal siggnal);
94 static ptid_t mips_wait (ptid_t ptid,
95 struct target_waitstatus *status);
97 static int mips_map_regno (int regno);
99 static void mips_fetch_registers (int regno);
101 static void mips_prepare_to_store (void);
103 static void mips_store_registers (int regno);
105 static unsigned int mips_fetch_word (CORE_ADDR addr);
107 static int mips_store_word (CORE_ADDR addr, unsigned int value,
110 static int mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
112 struct mem_attrib *attrib,
113 struct target_ops *target);
115 static void mips_files_info (struct target_ops *ignore);
117 static void mips_create_inferior (char *execfile, char *args, char **env);
119 static void mips_mourn_inferior (void);
121 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
123 static int pmon_zeroset (int recsize, char **buff, int *amount,
124 unsigned int *chksum);
126 static int pmon_checkset (int recsize, char **buff, int *value);
128 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
129 int *inptr, int inamount, int *recsize,
130 unsigned int *csum, unsigned int *zerofill);
132 static int pmon_check_ack (char *mesg);
134 static void pmon_start_download (void);
136 static void pmon_end_download (int final, int bintotal);
138 static void pmon_download (char *buffer, int length);
140 static void pmon_load_fast (char *file);
142 static void mips_load (char *file, int from_tty);
144 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
145 unsigned char *myaddr, int len);
147 static int set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
149 static int clear_breakpoint (CORE_ADDR addr, int len, enum break_type type);
151 static int common_breakpoint (int set, CORE_ADDR addr, int len,
152 enum break_type type);
154 /* Forward declarations. */
155 extern struct target_ops mips_ops;
156 extern struct target_ops pmon_ops;
157 extern struct target_ops ddb_ops;
159 /* The MIPS remote debugging interface is built on top of a simple
160 packet protocol. Each packet is organized as follows:
162 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
163 may not appear anywhere else in the packet. Any time a SYN is
164 seen, a new packet should be assumed to have begun.
167 This byte contains the upper five bits of the logical length
168 of the data section, plus a single bit indicating whether this
169 is a data packet or an acknowledgement. The documentation
170 indicates that this bit is 1 for a data packet, but the actual
171 board uses 1 for an acknowledgement. The value of the byte is
172 0x40 + (ack ? 0x20 : 0) + (len >> 6)
173 (we always have 0 <= len < 1024). Acknowledgement packets do
174 not carry data, and must have a data length of 0.
176 LEN1 This byte contains the lower six bits of the logical length of
177 the data section. The value is
180 SEQ This byte contains the six bit sequence number of the packet.
183 An acknowlegment packet contains the sequence number of the
184 packet being acknowledged plus 1 modulo 64. Data packets are
185 transmitted in sequence. There may only be one outstanding
186 unacknowledged data packet at a time. The sequence numbers
187 are independent in each direction. If an acknowledgement for
188 the previous packet is received (i.e., an acknowledgement with
189 the sequence number of the packet just sent) the packet just
190 sent should be retransmitted. If no acknowledgement is
191 received within a timeout period, the packet should be
192 retransmitted. This has an unfortunate failure condition on a
193 high-latency line, as a delayed acknowledgement may lead to an
194 endless series of duplicate packets.
196 DATA The actual data bytes follow. The following characters are
197 escaped inline with DLE (ASCII 020, or ^P):
203 The additional DLE characters are not counted in the logical
204 length stored in the TYPE_LEN and LEN1 bytes.
209 These bytes contain an 18 bit checksum of the complete
210 contents of the packet excluding the SEQ byte and the
211 CSUM[123] bytes. The checksum is simply the twos complement
212 addition of all the bytes treated as unsigned characters. The
213 values of the checksum bytes are:
214 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
215 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
216 CSUM3: 0x40 + (cksum & 0x3f)
218 It happens that the MIPS remote debugging protocol always
219 communicates with ASCII strings. Because of this, this
220 implementation doesn't bother to handle the DLE quoting mechanism,
221 since it will never be required. */
225 /* The SYN character which starts each packet. */
228 /* The 0x40 used to offset each packet (this value ensures that all of
229 the header and trailer bytes, other than SYN, are printable ASCII
231 #define HDR_OFFSET 0x40
233 /* The indices of the bytes in the packet header. */
234 #define HDR_INDX_SYN 0
235 #define HDR_INDX_TYPE_LEN 1
236 #define HDR_INDX_LEN1 2
237 #define HDR_INDX_SEQ 3
240 /* The data/ack bit in the TYPE_LEN header byte. */
241 #define TYPE_LEN_DA_BIT 0x20
242 #define TYPE_LEN_DATA 0
243 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
245 /* How to compute the header bytes. */
246 #define HDR_SET_SYN(data, len, seq) (SYN)
247 #define HDR_SET_TYPE_LEN(data, len, seq) \
249 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
250 + (((len) >> 6) & 0x1f))
251 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
252 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
254 /* Check that a header byte is reasonable. */
255 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
257 /* Get data from the header. These macros evaluate their argument
259 #define HDR_IS_DATA(hdr) \
260 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
261 #define HDR_GET_LEN(hdr) \
262 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
263 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
265 /* The maximum data length. */
266 #define DATA_MAXLEN 1023
268 /* The trailer offset. */
269 #define TRLR_OFFSET HDR_OFFSET
271 /* The indices of the bytes in the packet trailer. */
272 #define TRLR_INDX_CSUM1 0
273 #define TRLR_INDX_CSUM2 1
274 #define TRLR_INDX_CSUM3 2
275 #define TRLR_LENGTH 3
277 /* How to compute the trailer bytes. */
278 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
279 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
280 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
282 /* Check that a trailer byte is reasonable. */
283 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
285 /* Get data from the trailer. This evaluates its argument multiple
287 #define TRLR_GET_CKSUM(trlr) \
288 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
289 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
290 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
292 /* The sequence number modulos. */
293 #define SEQ_MODULOS (64)
295 /* PMON commands to load from the serial port or UDP socket. */
296 #define LOAD_CMD "load -b -s tty0\r"
297 #define LOAD_CMD_UDP "load -b -s udp\r"
299 /* The target vectors for the four different remote MIPS targets.
300 These are initialized with code in _initialize_remote_mips instead
301 of static initializers, to make it easier to extend the target_ops
303 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
305 enum mips_monitor_type
307 /* IDT/SIM monitor being used: */
309 /* PMON monitor being used: */
310 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
311 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
312 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
313 /* Last and unused value, for sizing vectors, etc. */
316 static enum mips_monitor_type mips_monitor = MON_LAST;
318 /* The monitor prompt text. If the user sets the PMON prompt
319 to some new value, the GDB `set monitor-prompt' command must also
320 be used to inform GDB about the expected prompt. Otherwise, GDB
321 will not be able to connect to PMON in mips_initialize().
322 If the `set monitor-prompt' command is not used, the expected
323 default prompt will be set according the target:
330 static char *mips_monitor_prompt;
332 /* Set to 1 if the target is open. */
333 static int mips_is_open;
335 /* Currently active target description (if mips_is_open == 1) */
336 static struct target_ops *current_ops;
338 /* Set to 1 while the connection is being initialized. */
339 static int mips_initializing;
341 /* Set to 1 while the connection is being brought down. */
342 static int mips_exiting;
344 /* The next sequence number to send. */
345 static unsigned int mips_send_seq;
347 /* The next sequence number we expect to receive. */
348 static unsigned int mips_receive_seq;
350 /* The time to wait before retransmitting a packet, in seconds. */
351 static int mips_retransmit_wait = 3;
353 /* The number of times to try retransmitting a packet before giving up. */
354 static int mips_send_retries = 10;
356 /* The number of garbage characters to accept when looking for an
357 SYN for the next packet. */
358 static int mips_syn_garbage = 10;
360 /* The time to wait for a packet, in seconds. */
361 static int mips_receive_wait = 5;
363 /* Set if we have sent a packet to the board but have not yet received
365 static int mips_need_reply = 0;
367 /* Handle used to access serial I/O stream. */
368 static struct serial *mips_desc;
370 /* UDP handle used to download files to target. */
371 static struct serial *udp_desc;
372 static int udp_in_use;
374 /* TFTP filename used to download files to DDB board, in the form
376 static char *tftp_name; /* host:filename */
377 static char *tftp_localname; /* filename portion of above */
378 static int tftp_in_use;
379 static FILE *tftp_file;
381 /* Counts the number of times the user tried to interrupt the target (usually
383 static int interrupt_count;
385 /* If non-zero, means that the target is running. */
386 static int mips_wait_flag = 0;
388 /* If non-zero, monitor supports breakpoint commands. */
389 static int monitor_supports_breakpoints = 0;
391 /* Data cache header. */
393 #if 0 /* not used (yet?) */
394 static DCACHE *mips_dcache;
397 /* Non-zero means that we've just hit a read or write watchpoint */
398 static int hit_watchpoint;
400 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
401 The table is indexed by a breakpoint number, which is an integer
402 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
404 #define MAX_LSI_BREAKPOINTS 256
405 struct lsi_breakpoint_info
407 enum break_type type; /* type of breakpoint */
408 CORE_ADDR addr; /* address of breakpoint */
409 int len; /* length of region being watched */
410 unsigned long value; /* value to watch */
412 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
414 /* Error/warning codes returned by LSI PMON for breakpoint commands.
415 Warning values may be ORed together; error values may not. */
416 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
417 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
418 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
419 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
421 #define E_ERR 0x200 /* This bit is set if the error code is an error */
422 #define E_BPT 0x200 /* error: No such breakpoint number */
423 #define E_RGE 0x201 /* error: Range is not supported */
424 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
425 #define E_OUT 0x203 /* error: Out of hardware resources */
426 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
430 int code; /* error code */
431 char *string; /* string associated with this code */
434 struct lsi_error lsi_warning_table[] =
436 {W_MSK, "Range feature is supported via mask"},
437 {W_VAL, "Value check is not supported in hardware"},
438 {W_QAL, "Requested qualifiers are not supported in hardware"},
442 struct lsi_error lsi_error_table[] =
444 {E_BPT, "No such breakpoint number"},
445 {E_RGE, "Range is not supported"},
446 {E_QAL, "The requested qualifiers can not be used"},
447 {E_OUT, "Out of hardware resources"},
448 {E_NON, "Hardware breakpoint not supported"},
452 /* Set to 1 with the 'set monitor-warnings' command to enable printing
453 of warnings returned by PMON when hardware breakpoints are used. */
454 static int monitor_warnings;
461 serial_close (mips_desc);
465 serial_close (udp_desc);
471 /* Handle low-level error that we can't recover from. Note that just
472 error()ing out from target_wait or some such low-level place will cause
473 all hell to break loose--the rest of GDB will tend to get left in an
474 inconsistent state. */
477 mips_error (char *string,...)
481 va_start (args, string);
483 target_terminal_ours ();
484 wrap_here (""); /* Force out any buffered output */
485 gdb_flush (gdb_stdout);
487 fputs_filtered (error_pre_print, gdb_stderr);
488 vfprintf_filtered (gdb_stderr, string, args);
489 fprintf_filtered (gdb_stderr, "\n");
491 gdb_flush (gdb_stderr);
493 /* Clean up in such a way that mips_close won't try to talk to the
494 board (it almost surely won't work since we weren't able to talk to
498 printf_unfiltered ("Ending remote MIPS debugging.\n");
499 target_mourn_inferior ();
501 throw_exception (RETURN_ERROR);
504 /* putc_readable - print a character, displaying non-printable chars in
505 ^x notation or in hex. */
508 fputc_readable (int ch, struct ui_file *file)
511 fputc_unfiltered ('\n', file);
513 fprintf_unfiltered (file, "\\r");
514 else if (ch < 0x20) /* ASCII control character */
515 fprintf_unfiltered (file, "^%c", ch + '@');
516 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
517 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
519 fputc_unfiltered (ch, file);
523 /* puts_readable - print a string, displaying non-printable chars in
524 ^x notation or in hex. */
527 fputs_readable (const char *string, struct ui_file *file)
531 while ((c = *string++) != '\0')
532 fputc_readable (c, file);
536 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
537 timed out. TIMEOUT specifies timeout value in seconds.
541 mips_expect_timeout (const char *string, int timeout)
543 const char *p = string;
547 fprintf_unfiltered (gdb_stdlog, "Expected \"");
548 fputs_readable (string, gdb_stdlog);
549 fprintf_unfiltered (gdb_stdlog, "\", got \"");
557 /* Must use serial_readchar() here cuz mips_readchar would get
558 confused if we were waiting for the mips_monitor_prompt... */
560 c = serial_readchar (mips_desc, timeout);
562 if (c == SERIAL_TIMEOUT)
565 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
570 fputc_readable (c, gdb_stdlog);
578 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
591 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
592 timed out. The timeout value is hard-coded to 2 seconds. Use
593 mips_expect_timeout if a different timeout value is needed.
597 mips_expect (const char *string)
599 return mips_expect_timeout (string, remote_timeout);
602 /* Read the required number of characters into the given buffer (which
603 is assumed to be large enough). The only failure is a timeout. */
605 mips_getstring (char *string, int n)
613 c = serial_readchar (mips_desc, remote_timeout);
615 if (c == SERIAL_TIMEOUT)
617 fprintf_unfiltered (gdb_stderr,
618 "Failed to read %d characters from target (TIMEOUT)\n", n);
631 /* Read a character from the remote, aborting on error. Returns
632 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
633 returns). FIXME: If we see the string mips_monitor_prompt from the
634 board, then we are debugging on the main console port, and we have
635 somehow dropped out of remote debugging mode. In this case, we
636 automatically go back in to remote debugging mode. This is a hack,
637 put in because I can't find any way for a program running on the
638 remote board to terminate without also ending remote debugging
639 mode. I assume users won't have any trouble with this; for one
640 thing, the IDT documentation generally assumes that the remote
641 debugging port is not the console port. This is, however, very
642 convenient for DejaGnu when you only have one connected serial
646 mips_readchar (int timeout)
649 static int state = 0;
650 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
656 if (i == -1 && watchdog > 0)
660 if (state == mips_monitor_prompt_len)
662 ch = serial_readchar (mips_desc, timeout);
664 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
666 target_mourn_inferior ();
667 error ("Watchdog has expired. Target detached.\n");
670 if (ch == SERIAL_EOF)
671 mips_error ("End of file from remote");
672 if (ch == SERIAL_ERROR)
673 mips_error ("Error reading from remote: %s", safe_strerror (errno));
674 if (remote_debug > 1)
676 /* Don't use _filtered; we can't deal with a QUIT out of
677 target_wait, and I think this might be called from there. */
678 if (ch != SERIAL_TIMEOUT)
679 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
681 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
684 /* If we have seen mips_monitor_prompt and we either time out, or
685 we see a @ (which was echoed from a packet we sent), reset the
686 board as described above. The first character in a packet after
687 the SYN (which is not echoed) is always an @ unless the packet is
688 more than 64 characters long, which ours never are. */
689 if ((ch == SERIAL_TIMEOUT || ch == '@')
690 && state == mips_monitor_prompt_len
691 && !mips_initializing
694 if (remote_debug > 0)
695 /* Don't use _filtered; we can't deal with a QUIT out of
696 target_wait, and I think this might be called from there. */
697 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
704 /* At this point, about the only thing we can do is abort the command
705 in progress and get back to command level as quickly as possible. */
707 error ("Remote board reset, debug protocol re-initialized.");
710 if (ch == mips_monitor_prompt[state])
718 /* Get a packet header, putting the data in the supplied buffer.
719 PGARBAGE is a pointer to the number of garbage characters received
720 so far. CH is the last character received. Returns 0 for success,
721 or -1 for timeout. */
724 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
730 /* Wait for a SYN. mips_syn_garbage is intended to prevent
731 sitting here indefinitely if the board sends us one garbage
732 character per second. ch may already have a value from the
733 last time through the loop. */
736 ch = mips_readchar (timeout);
737 if (ch == SERIAL_TIMEOUT)
741 /* Printing the character here lets the user of gdb see
742 what the program is outputting, if the debugging is
743 being done on the console port. Don't use _filtered:
744 we can't deal with a QUIT out of target_wait and
745 buffered target output confuses the user. */
746 if (!mips_initializing || remote_debug > 0)
748 if (isprint (ch) || isspace (ch))
750 fputc_unfiltered (ch, gdb_stdtarg);
754 fputc_readable (ch, gdb_stdtarg);
756 gdb_flush (gdb_stdtarg);
759 /* Only count unprintable characters. */
760 if (! (isprint (ch) || isspace (ch)))
763 if (mips_syn_garbage > 0
764 && *pgarbage > mips_syn_garbage)
765 mips_error ("Debug protocol failure: more than %d characters before a sync.",
770 /* Get the packet header following the SYN. */
771 for (i = 1; i < HDR_LENGTH; i++)
773 ch = mips_readchar (timeout);
774 if (ch == SERIAL_TIMEOUT)
776 /* Make sure this is a header byte. */
777 if (ch == SYN || !HDR_CHECK (ch))
783 /* If we got the complete header, we can return. Otherwise we
784 loop around and keep looking for SYN. */
790 /* Get a packet header, putting the data in the supplied buffer.
791 PGARBAGE is a pointer to the number of garbage characters received
792 so far. The last character read is returned in *PCH. Returns 0
793 for success, -1 for timeout, -2 for error. */
796 mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout)
801 for (i = 0; i < TRLR_LENGTH; i++)
803 ch = mips_readchar (timeout);
805 if (ch == SERIAL_TIMEOUT)
807 if (!TRLR_CHECK (ch))
814 /* Get the checksum of a packet. HDR points to the packet header.
815 DATA points to the packet data. LEN is the length of DATA. */
818 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
820 const unsigned char *p;
826 /* The initial SYN is not included in the checksum. */
840 /* Send a packet containing the given ASCII string. */
843 mips_send_packet (const char *s, int get_ack)
845 /* unsigned */ int len;
846 unsigned char *packet;
851 if (len > DATA_MAXLEN)
852 mips_error ("MIPS protocol data packet too long: %s", s);
854 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
856 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
857 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
858 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
859 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
861 memcpy (packet + HDR_LENGTH, s, len);
863 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
864 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
865 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
866 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
868 /* Increment the sequence number. This will set mips_send_seq to
869 the sequence number we expect in the acknowledgement. */
870 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
872 /* We can only have one outstanding data packet, so we just wait for
873 the acknowledgement here. Keep retransmitting the packet until
874 we get one, or until we've tried too many times. */
875 for (try = 0; try < mips_send_retries; try++)
880 if (remote_debug > 0)
882 /* Don't use _filtered; we can't deal with a QUIT out of
883 target_wait, and I think this might be called from there. */
884 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
885 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
888 if (serial_write (mips_desc, packet,
889 HDR_LENGTH + len + TRLR_LENGTH) != 0)
890 mips_error ("write to target failed: %s", safe_strerror (errno));
899 unsigned char hdr[HDR_LENGTH + 1];
900 unsigned char trlr[TRLR_LENGTH + 1];
904 /* Get the packet header. If we time out, resend the data
906 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
912 /* If we get a data packet, assume it is a duplicate and
913 ignore it. FIXME: If the acknowledgement is lost, this
914 data packet may be the packet the remote sends after the
916 if (HDR_IS_DATA (hdr))
920 /* Ignore any errors raised whilst attempting to ignore
923 len = HDR_GET_LEN (hdr);
925 for (i = 0; i < len; i++)
929 rch = mips_readchar (remote_timeout);
935 if (rch == SERIAL_TIMEOUT)
937 /* ignore the character */
941 (void) mips_receive_trailer (trlr, &garbage, &ch,
944 /* We don't bother checking the checksum, or providing an
945 ACK to the packet. */
949 /* If the length is not 0, this is a garbled packet. */
950 if (HDR_GET_LEN (hdr) != 0)
953 /* Get the packet trailer. */
954 err = mips_receive_trailer (trlr, &garbage, &ch,
955 mips_retransmit_wait);
957 /* If we timed out, resend the data packet. */
961 /* If we got a bad character, reread the header. */
965 /* If the checksum does not match the trailer checksum, this
966 is a bad packet; ignore it. */
967 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
968 != TRLR_GET_CKSUM (trlr))
971 if (remote_debug > 0)
973 hdr[HDR_LENGTH] = '\0';
974 trlr[TRLR_LENGTH] = '\0';
975 /* Don't use _filtered; we can't deal with a QUIT out of
976 target_wait, and I think this might be called from there. */
977 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
978 HDR_GET_SEQ (hdr), hdr + 1, trlr);
981 /* If this ack is for the current packet, we're done. */
982 seq = HDR_GET_SEQ (hdr);
983 if (seq == mips_send_seq)
986 /* If this ack is for the last packet, resend the current
988 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
991 /* Otherwise this is a bad ack; ignore it. Increment the
992 garbage count to ensure that we do not stay in this loop
998 mips_error ("Remote did not acknowledge packet");
1001 /* Receive and acknowledge a packet, returning the data in BUFF (which
1002 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1003 implies that only the sender retransmits packets, so this code just
1004 waits silently for a packet. It returns the length of the received
1005 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1006 don't print an error message and return -1. */
1009 mips_receive_packet (char *buff, int throw_error, int timeout)
1014 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1021 unsigned char hdr[HDR_LENGTH];
1022 unsigned char trlr[TRLR_LENGTH];
1026 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1029 mips_error ("Timed out waiting for remote packet");
1036 /* An acknowledgement is probably a duplicate; ignore it. */
1037 if (!HDR_IS_DATA (hdr))
1039 len = HDR_GET_LEN (hdr);
1040 /* Check if the length is valid for an ACK, we may aswell
1041 try and read the remainder of the packet: */
1044 /* Ignore the error condition, since we are going to
1045 ignore the packet anyway. */
1046 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1048 /* Don't use _filtered; we can't deal with a QUIT out of
1049 target_wait, and I think this might be called from there. */
1050 if (remote_debug > 0)
1051 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1055 len = HDR_GET_LEN (hdr);
1056 for (i = 0; i < len; i++)
1060 rch = mips_readchar (timeout);
1066 if (rch == SERIAL_TIMEOUT)
1069 mips_error ("Timed out waiting for remote packet");
1078 /* Don't use _filtered; we can't deal with a QUIT out of
1079 target_wait, and I think this might be called from there. */
1080 if (remote_debug > 0)
1081 fprintf_unfiltered (gdb_stdlog,
1082 "Got new SYN after %d chars (wanted %d)\n",
1087 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1091 mips_error ("Timed out waiting for packet");
1097 /* Don't use _filtered; we can't deal with a QUIT out of
1098 target_wait, and I think this might be called from there. */
1099 if (remote_debug > 0)
1100 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1104 /* If this is the wrong sequence number, ignore it. */
1105 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
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,
1111 "Ignoring sequence number %d (want %d)\n",
1112 HDR_GET_SEQ (hdr), mips_receive_seq);
1116 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1119 if (remote_debug > 0)
1120 /* Don't use _filtered; we can't deal with a QUIT out of
1121 target_wait, and I think this might be called from there. */
1122 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1123 mips_cksum (hdr, buff, len),
1124 TRLR_GET_CKSUM (trlr));
1126 /* The checksum failed. Send an acknowledgement for the
1127 previous packet to tell the remote to resend the packet. */
1128 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1129 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1130 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1131 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1133 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1135 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1136 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1137 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1139 if (remote_debug > 0)
1141 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1142 /* Don't use _filtered; we can't deal with a QUIT out of
1143 target_wait, and I think this might be called from there. */
1144 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1148 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1151 mips_error ("write to target failed: %s", safe_strerror (errno));
1157 if (remote_debug > 0)
1160 /* Don't use _filtered; we can't deal with a QUIT out of
1161 target_wait, and I think this might be called from there. */
1162 printf_unfiltered ("Got packet \"%s\"\n", buff);
1165 /* We got the packet. Send an acknowledgement. */
1166 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1168 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1169 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1170 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1171 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1173 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1175 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1176 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1177 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1179 if (remote_debug > 0)
1181 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1182 /* Don't use _filtered; we can't deal with a QUIT out of
1183 target_wait, and I think this might be called from there. */
1184 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1188 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1191 mips_error ("write to target failed: %s", safe_strerror (errno));
1199 /* Optionally send a request to the remote system and optionally wait
1200 for the reply. This implements the remote debugging protocol,
1201 which is built on top of the packet protocol defined above. Each
1202 request has an ADDR argument and a DATA argument. The following
1203 requests are defined:
1205 \0 don't send a request; just wait for a reply
1206 i read word from instruction space at ADDR
1207 d read word from data space at ADDR
1208 I write DATA to instruction space at ADDR
1209 D write DATA to data space at ADDR
1210 r read register number ADDR
1211 R set register number ADDR to value DATA
1212 c continue execution (if ADDR != 1, set pc to ADDR)
1213 s single step (if ADDR != 1, set pc to ADDR)
1215 The read requests return the value requested. The write requests
1216 return the previous value in the changed location. The execution
1217 requests return a UNIX wait value (the approximate signal which
1218 caused execution to stop is in the upper eight bits).
1220 If PERR is not NULL, this function waits for a reply. If an error
1221 occurs, it sets *PERR to 1 and sets errno according to what the
1222 target board reports. */
1225 mips_request (int cmd,
1232 char myBuff[DATA_MAXLEN + 1];
1237 unsigned long rresponse;
1239 if (buff == (char *) NULL)
1244 if (mips_need_reply)
1245 internal_error (__FILE__, __LINE__,
1246 "mips_request: Trying to send command before reply");
1247 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data));
1248 mips_send_packet (buff, 1);
1249 mips_need_reply = 1;
1252 if (perr == (int *) NULL)
1255 if (!mips_need_reply)
1256 internal_error (__FILE__, __LINE__,
1257 "mips_request: Trying to get reply before command");
1259 mips_need_reply = 0;
1261 len = mips_receive_packet (buff, 1, timeout);
1264 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1265 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1266 || (cmd != '\0' && rcmd != cmd))
1267 mips_error ("Bad response from remote board");
1273 /* FIXME: This will returns MIPS errno numbers, which may or may
1274 not be the same as errno values used on other systems. If
1275 they stick to common errno values, they will be the same, but
1276 if they don't, they must be translated. */
1287 mips_initialize_cleanups (void *arg)
1289 mips_initializing = 0;
1293 mips_exit_cleanups (void *arg)
1299 mips_send_command (const char *cmd, int prompt)
1301 serial_write (mips_desc, cmd, strlen (cmd));
1305 mips_expect (mips_monitor_prompt);
1308 /* Enter remote (dbx) debug mode: */
1310 mips_enter_debug (void)
1312 /* Reset the sequence numbers, ready for the new debug sequence: */
1314 mips_receive_seq = 0;
1316 if (mips_monitor != MON_IDT)
1317 mips_send_command ("debug\r", 0);
1318 else /* assume IDT monitor by default */
1319 mips_send_command ("db tty0\r", 0);
1322 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1324 /* We don't need to absorb any spurious characters here, since the
1325 mips_receive_header will eat up a reasonable number of characters
1326 whilst looking for the SYN, however this avoids the "garbage"
1327 being displayed to the user. */
1328 if (mips_monitor != MON_IDT)
1332 char buff[DATA_MAXLEN + 1];
1333 if (mips_receive_packet (buff, 1, 3) < 0)
1334 mips_error ("Failed to initialize (didn't receive packet).");
1338 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1340 mips_exit_debug (void)
1343 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1347 if (mips_monitor != MON_IDT)
1349 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1350 so we do not get a reply to this command: */
1351 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1352 mips_need_reply = 0;
1353 if (!mips_expect (" break!"))
1357 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1359 if (!mips_expect (mips_monitor_prompt))
1362 do_cleanups (old_cleanups);
1367 /* Initialize a new connection to the MIPS board, and make sure we are
1368 really connected. */
1371 mips_initialize (void)
1374 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1377 /* What is this code doing here? I don't see any way it can happen, and
1378 it might mean mips_initializing didn't get cleared properly.
1379 So I'll make it a warning. */
1381 if (mips_initializing)
1383 warning ("internal error: mips_initialize called twice");
1388 mips_initializing = 1;
1390 /* At this point, the packit protocol isn't responding. We'll try getting
1391 into the monitor, and restarting the protocol. */
1393 /* Force the system into the monitor. After this we *should* be at
1394 the mips_monitor_prompt. */
1395 if (mips_monitor != MON_IDT)
1396 j = 0; /* start by checking if we are already at the prompt */
1398 j = 1; /* start by sending a break */
1403 case 0: /* First, try sending a CR */
1404 serial_flush_input (mips_desc);
1405 serial_write (mips_desc, "\r", 1);
1407 case 1: /* First, try sending a break */
1408 serial_send_break (mips_desc);
1410 case 2: /* Then, try a ^C */
1411 serial_write (mips_desc, "\003", 1);
1413 case 3: /* Then, try escaping from download */
1415 if (mips_monitor != MON_IDT)
1419 /* We shouldn't need to send multiple termination
1420 sequences, since the target performs line (or
1421 block) reads, and then processes those
1422 packets. In-case we were downloading a large packet
1423 we flush the output buffer before inserting a
1424 termination sequence. */
1425 serial_flush_output (mips_desc);
1426 sprintf (tbuff, "\r/E/E\r");
1427 serial_write (mips_desc, tbuff, 6);
1434 /* We are possibly in binary download mode, having
1435 aborted in the middle of an S-record. ^C won't
1436 work because of binary mode. The only reliable way
1437 out is to send enough termination packets (8 bytes)
1438 to fill up and then overflow the largest size
1439 S-record (255 bytes in this case). This amounts to
1443 mips_make_srec (srec, '7', 0, NULL, 0);
1445 for (i = 1; i <= 33; i++)
1447 serial_write (mips_desc, srec, 8);
1449 if (serial_readchar (mips_desc, 0) >= 0)
1450 break; /* Break immediatly if we get something from
1457 mips_error ("Failed to initialize.");
1460 if (mips_expect (mips_monitor_prompt))
1464 if (mips_monitor != MON_IDT)
1466 /* Sometimes PMON ignores the first few characters in the first
1467 command sent after a load. Sending a blank command gets
1469 mips_send_command ("\r", -1);
1471 /* Ensure the correct target state: */
1472 if (mips_monitor != MON_LSI)
1473 mips_send_command ("set regsize 64\r", -1);
1474 mips_send_command ("set hostport tty0\r", -1);
1475 mips_send_command ("set brkcmd \"\"\r", -1);
1476 /* Delete all the current breakpoints: */
1477 mips_send_command ("db *\r", -1);
1478 /* NOTE: PMON does not have breakpoint support through the
1479 "debug" mode, only at the monitor command-line. */
1482 mips_enter_debug ();
1484 /* Clear all breakpoints: */
1485 if ((mips_monitor == MON_IDT
1486 && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1487 || mips_monitor == MON_LSI)
1488 monitor_supports_breakpoints = 1;
1490 monitor_supports_breakpoints = 0;
1492 do_cleanups (old_cleanups);
1494 /* If this doesn't call error, we have connected; we don't care if
1495 the request itself succeeds or fails. */
1497 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1500 /* Open a connection to the remote board. */
1502 common_open (struct target_ops *ops, char *name, int from_tty,
1503 enum mips_monitor_type new_monitor,
1504 const char *new_monitor_prompt)
1507 char *serial_port_name;
1508 char *remote_name = 0;
1509 char *local_name = 0;
1514 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1515 device is attached to the target board (e.g., /dev/ttya).\n"
1516 "If you want to use TFTP to download to the board, specify the name of a\n"
1517 "temporary file to be used by GDB for downloads as the second argument.\n"
1518 "This filename must be in the form host:filename, where host is the name\n"
1519 "of the host running the TFTP server, and the file must be readable by the\n"
1520 "world. If the local name of the temporary file differs from the name as\n"
1521 "seen from the board via TFTP, specify that name as the third parameter.\n");
1523 /* Parse the serial port name, the optional TFTP name, and the
1524 optional local TFTP name. */
1525 if ((argv = buildargv (name)) == NULL)
1527 make_cleanup_freeargv (argv);
1529 serial_port_name = xstrdup (argv[0]);
1530 if (argv[1]) /* remote TFTP name specified? */
1532 remote_name = argv[1];
1533 if (argv[2]) /* local TFTP filename specified? */
1534 local_name = argv[2];
1537 target_preopen (from_tty);
1540 unpush_target (current_ops);
1542 /* Open and initialize the serial port. */
1543 mips_desc = serial_open (serial_port_name);
1544 if (mips_desc == NULL)
1545 perror_with_name (serial_port_name);
1547 if (baud_rate != -1)
1549 if (serial_setbaudrate (mips_desc, baud_rate))
1551 serial_close (mips_desc);
1552 perror_with_name (serial_port_name);
1556 serial_raw (mips_desc);
1558 /* Open and initialize the optional download port. If it is in the form
1559 hostname#portnumber, it's a UDP socket. If it is in the form
1560 hostname:filename, assume it's the TFTP filename that must be
1561 passed to the DDB board to tell it where to get the load file. */
1564 if (strchr (remote_name, '#'))
1566 udp_desc = serial_open (remote_name);
1568 perror_with_name ("Unable to open UDP port");
1573 /* Save the remote and local names of the TFTP temp file. If
1574 the user didn't specify a local name, assume it's the same
1575 as the part of the remote name after the "host:". */
1579 xfree (tftp_localname);
1580 if (local_name == NULL)
1581 if ((local_name = strchr (remote_name, ':')) != NULL)
1582 local_name++; /* skip over the colon */
1583 if (local_name == NULL)
1584 local_name = remote_name; /* local name same as remote name */
1585 tftp_name = xstrdup (remote_name);
1586 tftp_localname = xstrdup (local_name);
1594 /* Reset the expected monitor prompt if it's never been set before. */
1595 if (mips_monitor_prompt == NULL)
1596 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1597 mips_monitor = new_monitor;
1602 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1604 /* Switch to using remote target now. */
1607 /* FIXME: Should we call start_remote here? */
1609 /* Try to figure out the processor model if possible. */
1610 ptype = mips_read_processor_type ();
1612 mips_set_processor_type_command (xstrdup (ptype), 0);
1614 /* This is really the job of start_remote however, that makes an
1615 assumption that the target is about to print out a status message
1616 of some sort. That doesn't happen here (in fact, it may not be
1617 possible to get the monitor to send the appropriate packet). */
1619 flush_cached_frames ();
1620 registers_changed ();
1621 stop_pc = read_pc ();
1622 print_stack_frame (get_selected_frame (), -1, 1);
1623 xfree (serial_port_name);
1627 mips_open (char *name, int from_tty)
1629 const char *monitor_prompt = NULL;
1630 if (TARGET_ARCHITECTURE != NULL
1631 && TARGET_ARCHITECTURE->arch == bfd_arch_mips)
1633 switch (TARGET_ARCHITECTURE->mach)
1635 case bfd_mach_mips4100:
1636 case bfd_mach_mips4300:
1637 case bfd_mach_mips4600:
1638 case bfd_mach_mips4650:
1639 case bfd_mach_mips5000:
1640 monitor_prompt = "<RISQ> ";
1644 if (monitor_prompt == NULL)
1645 monitor_prompt = "<IDT>";
1646 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1650 pmon_open (char *name, int from_tty)
1652 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1656 ddb_open (char *name, int from_tty)
1658 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1662 lsi_open (char *name, int from_tty)
1666 /* Clear the LSI breakpoint table. */
1667 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1668 lsi_breakpoints[i].type = BREAK_UNUSED;
1670 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1673 /* Close a connection to the remote board. */
1676 mips_close (int quitting)
1680 /* Get the board out of remote debugging mode. */
1681 (void) mips_exit_debug ();
1687 /* Detach from the remote board. */
1690 mips_detach (char *args, int from_tty)
1693 error ("Argument given to \"detach\" when remotely debugging.");
1700 printf_unfiltered ("Ending remote MIPS debugging.\n");
1703 /* Tell the target board to resume. This does not wait for a reply
1704 from the board, except in the case of single-stepping on LSI boards,
1705 where PMON does return a reply. */
1708 mips_resume (ptid_t ptid, int step, enum target_signal siggnal)
1712 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1713 a single step, so we wait for that. */
1714 mips_request (step ? 's' : 'c', 1, siggnal,
1715 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1716 mips_receive_wait, NULL);
1719 /* Return the signal corresponding to SIG, where SIG is the number which
1720 the MIPS protocol uses for the signal. */
1721 static enum target_signal
1722 mips_signal_from_protocol (int sig)
1724 /* We allow a few more signals than the IDT board actually returns, on
1725 the theory that there is at least *some* hope that perhaps the numbering
1726 for these signals is widely agreed upon. */
1729 return TARGET_SIGNAL_UNKNOWN;
1731 /* Don't want to use target_signal_from_host because we are converting
1732 from MIPS signal numbers, not host ones. Our internal numbers
1733 match the MIPS numbers for the signals the board can return, which
1734 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1735 return (enum target_signal) sig;
1738 /* Wait until the remote stops, and return a wait status. */
1741 mips_wait (ptid_t ptid, struct target_waitstatus *status)
1745 char buff[DATA_MAXLEN];
1751 interrupt_count = 0;
1754 /* If we have not sent a single step or continue command, then the
1755 board is waiting for us to do something. Return a status
1756 indicating that it is stopped. */
1757 if (!mips_need_reply)
1759 status->kind = TARGET_WAITKIND_STOPPED;
1760 status->value.sig = TARGET_SIGNAL_TRAP;
1761 return inferior_ptid;
1764 /* No timeout; we sit here as long as the program continues to execute. */
1766 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1769 mips_error ("Remote failure: %s", safe_strerror (errno));
1771 /* On returning from a continue, the PMON monitor seems to start
1772 echoing back the messages we send prior to sending back the
1773 ACK. The code can cope with this, but to try and avoid the
1774 unnecessary serial traffic, and "spurious" characters displayed
1775 to the user, we cheat and reset the debug protocol. The problems
1776 seems to be caused by a check on the number of arguments, and the
1777 command length, within the monitor causing it to echo the command
1779 if (mips_monitor == MON_PMON)
1782 mips_enter_debug ();
1785 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1787 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1788 &rpc, &rfp, &rsp, flags);
1791 char buf[MAX_REGISTER_SIZE];
1793 store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM), rpc);
1794 supply_register (PC_REGNUM, buf);
1796 store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM), rfp);
1797 supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
1799 store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (SP_REGNUM), rsp);
1800 supply_register (SP_REGNUM, buf);
1802 store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (DEPRECATED_FP_REGNUM), 0);
1803 supply_register (DEPRECATED_FP_REGNUM, buf);
1809 for (i = 0; i <= 2; i++)
1810 if (flags[i] == 'r' || flags[i] == 'w')
1812 else if (flags[i] == '\000')
1817 if (strcmp (target_shortname, "lsi") == 0)
1820 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1821 Right now, PMON doesn't give us enough information to determine which
1822 breakpoint we hit. So we have to look up the PC in our own table
1823 of breakpoints, and if found, assume it's just a normal instruction
1824 fetch breakpoint, not a data watchpoint. FIXME when PMON
1825 provides some way to tell us what type of breakpoint it is. */
1827 CORE_ADDR pc = read_pc ();
1830 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1832 if (lsi_breakpoints[i].addr == pc
1833 && lsi_breakpoints[i].type == BREAK_FETCH)
1840 /* If a data breakpoint was hit, PMON returns the following packet:
1842 The return packet from an ordinary breakpoint doesn't have the
1843 extra 0x01 field tacked onto the end. */
1844 if (nfields == 1 && rpc == 1)
1849 /* NOTE: The following (sig) numbers are defined by PMON:
1850 SPP_SIGTRAP 5 breakpoint
1858 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1859 and so on, because the constants we want here are determined by the
1860 MIPS protocol and have nothing to do with what host we are running on. */
1861 if ((rstatus & 0xff) == 0)
1863 status->kind = TARGET_WAITKIND_EXITED;
1864 status->value.integer = (((rstatus) >> 8) & 0xff);
1866 else if ((rstatus & 0xff) == 0x7f)
1868 status->kind = TARGET_WAITKIND_STOPPED;
1869 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1871 /* If the stop PC is in the _exit function, assume
1872 we hit the 'break 0x3ff' instruction in _exit, so this
1873 is not a normal breakpoint. */
1874 if (strcmp (target_shortname, "lsi") == 0)
1877 CORE_ADDR func_start;
1878 CORE_ADDR pc = read_pc ();
1880 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1881 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1882 && func_start == pc)
1883 status->kind = TARGET_WAITKIND_EXITED;
1888 status->kind = TARGET_WAITKIND_SIGNALLED;
1889 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1892 return inferior_ptid;
1895 /* We have to map between the register numbers used by gdb and the
1896 register numbers used by the debugging protocol. This function
1897 assumes that we are using tm-mips.h. */
1899 #define REGNO_OFFSET 96
1902 mips_map_regno (int regno)
1906 if (regno >= mips_regnum (current_gdbarch)->fp0
1907 && regno < mips_regnum (current_gdbarch)->fp0 + 32)
1908 return regno - mips_regnum (current_gdbarch)->fp0 + 32;
1909 else if (regno == mips_regnum (current_gdbarch)->pc)
1910 return REGNO_OFFSET + 0;
1911 else if (regno == mips_regnum (current_gdbarch)->cause)
1912 return REGNO_OFFSET + 1;
1913 else if (regno == mips_regnum (current_gdbarch)->hi)
1914 return REGNO_OFFSET + 2;
1915 else if (regno == mips_regnum (current_gdbarch)->lo)
1916 return REGNO_OFFSET + 3;
1917 else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
1918 return REGNO_OFFSET + 4;
1919 else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
1920 return REGNO_OFFSET + 5;
1922 /* FIXME: Is there a way to get the status register? */
1926 /* Fetch the remote registers. */
1929 mips_fetch_registers (int regno)
1931 unsigned LONGEST val;
1936 for (regno = 0; regno < NUM_REGS; regno++)
1937 mips_fetch_registers (regno);
1941 if (regno == DEPRECATED_FP_REGNUM || regno == ZERO_REGNUM)
1942 /* DEPRECATED_FP_REGNUM on the mips is a hack which is just
1943 supposed to read zero (see also mips-nat.c). */
1947 /* If PMON doesn't support this register, don't waste serial
1948 bandwidth trying to read it. */
1949 int pmon_reg = mips_map_regno (regno);
1950 if (regno != 0 && pmon_reg == 0)
1954 /* Unfortunately the PMON version in the Vr4300 board has been
1955 compiled without the 64bit register access commands. This
1956 means we cannot get hold of the full register width. */
1957 if (mips_monitor == MON_DDB)
1958 val = (unsigned) mips_request ('t', pmon_reg, 0,
1959 &err, mips_receive_wait, NULL);
1961 val = mips_request ('r', pmon_reg, 0,
1962 &err, mips_receive_wait, NULL);
1964 mips_error ("Can't read register %d: %s", regno,
1965 safe_strerror (errno));
1970 char buf[MAX_REGISTER_SIZE];
1972 /* We got the number the register holds, but gdb expects to see a
1973 value in the target byte ordering. */
1974 store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regno), val);
1975 supply_register (regno, buf);
1979 /* Prepare to store registers. The MIPS protocol can store individual
1980 registers, so this function doesn't have to do anything. */
1983 mips_prepare_to_store (void)
1987 /* Store remote register(s). */
1990 mips_store_registers (int regno)
1996 for (regno = 0; regno < NUM_REGS; regno++)
1997 mips_store_registers (regno);
2001 mips_request ('R', mips_map_regno (regno),
2002 read_register (regno),
2003 &err, mips_receive_wait, NULL);
2005 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2008 /* Fetch a word from the target board. */
2011 mips_fetch_word (CORE_ADDR addr)
2016 val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2019 /* Data space failed; try instruction space. */
2020 val = mips_request ('i', addr, 0, &err,
2021 mips_receive_wait, NULL);
2023 mips_error ("Can't read address 0x%s: %s",
2024 paddr_nz (addr), safe_strerror (errno));
2029 /* Store a word to the target board. Returns errno code or zero for
2030 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2031 memory location there. */
2033 /* FIXME! make sure only 32-bit quantities get stored! */
2035 mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents)
2038 unsigned int oldcontents;
2040 oldcontents = mips_request ('D', addr, val, &err,
2041 mips_receive_wait, NULL);
2044 /* Data space failed; try instruction space. */
2045 oldcontents = mips_request ('I', addr, val, &err,
2046 mips_receive_wait, NULL);
2050 if (old_contents != NULL)
2051 store_unsigned_integer (old_contents, 4, oldcontents);
2055 /* Read or write LEN bytes from inferior memory at MEMADDR,
2056 transferring to or from debugger address MYADDR. Write to inferior
2057 if SHOULD_WRITE is nonzero. Returns length of data written or
2058 read; 0 for error. Note that protocol gives us the correct value
2059 for a longword, since it transfers values in ASCII. We want the
2060 byte values, so we have to swap the longword values. */
2062 static int mask_address_p = 1;
2065 mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
2066 struct mem_attrib *attrib, struct target_ops *target)
2074 /* PMON targets do not cope well with 64 bit addresses. Mask the
2075 value down to 32 bits. */
2077 memaddr &= (CORE_ADDR) 0xffffffff;
2079 /* Round starting address down to longword boundary. */
2080 addr = memaddr & ~3;
2081 /* Round ending address up; get number of longwords that makes. */
2082 count = (((memaddr + len) - addr) + 3) / 4;
2083 /* Allocate buffer of that many longwords. */
2084 buffer = alloca (count * 4);
2088 /* Fill start and end extra bytes of buffer with existing data. */
2089 if (addr != memaddr || len < 4)
2091 /* Need part of initial word -- fetch it. */
2092 store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr));
2097 /* Need part of last word -- fetch it. FIXME: we do this even
2098 if we don't need it. */
2099 store_unsigned_integer (&buffer[(count - 1) * 4], 4,
2100 mips_fetch_word (addr + (count - 1) * 4));
2103 /* Copy data to be written over corresponding part of buffer */
2105 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2107 /* Write the entire buffer. */
2109 for (i = 0; i < count; i++, addr += 4)
2111 status = mips_store_word (addr,
2112 extract_unsigned_integer (&buffer[i * 4], 4),
2114 /* Report each kilobyte (we download 32-bit words at a time) */
2117 printf_unfiltered ("*");
2118 gdb_flush (gdb_stdout);
2125 /* FIXME: Do we want a QUIT here? */
2128 printf_unfiltered ("\n");
2132 /* Read all the longwords */
2133 for (i = 0; i < count; i++, addr += 4)
2135 store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr));
2139 /* Copy appropriate bytes out of the buffer. */
2140 memcpy (myaddr, buffer + (memaddr & 3), len);
2145 /* Print info on this target. */
2148 mips_files_info (struct target_ops *ignore)
2150 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2153 /* Kill the process running on the board. This will actually only
2154 work if we are doing remote debugging over the console input. I
2155 think that if IDT/sim had the remote debug interrupt enabled on the
2156 right port, we could interrupt the process with a break signal. */
2161 if (!mips_wait_flag)
2166 if (interrupt_count >= 2)
2168 interrupt_count = 0;
2170 target_terminal_ours ();
2172 if (query ("Interrupted while waiting for the program.\n\
2173 Give up (and stop debugging it)? "))
2175 /* Clean up in such a way that mips_close won't try to talk to the
2176 board (it almost surely won't work since we weren't able to talk to
2181 printf_unfiltered ("Ending remote MIPS debugging.\n");
2182 target_mourn_inferior ();
2184 throw_exception (RETURN_QUIT);
2187 target_terminal_inferior ();
2190 if (remote_debug > 0)
2191 printf_unfiltered ("Sending break\n");
2193 serial_send_break (mips_desc);
2202 serial_write (mips_desc, &cc, 1);
2204 target_mourn_inferior ();
2209 /* Start running on the target board. */
2212 mips_create_inferior (char *execfile, char *args, char **env)
2219 Can't pass arguments to remote MIPS board; arguments ignored.");
2220 /* And don't try to use them on the next "run" command. */
2221 execute_command ("set args", 0);
2224 if (execfile == 0 || exec_bfd == 0)
2225 error ("No executable file specified");
2227 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2229 init_wait_for_inferior ();
2231 /* FIXME: Should we set inferior_ptid here? */
2233 proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
2236 /* Clean up after a process. Actually nothing to do. */
2239 mips_mourn_inferior (void)
2241 if (current_ops != NULL)
2242 unpush_target (current_ops);
2243 generic_mourn_inferior ();
2246 /* We can write a breakpoint and read the shadow contents in one
2249 /* Insert a breakpoint. On targets that don't have built-in
2250 breakpoint support, we read the contents of the target location and
2251 stash it, then overwrite it with a breakpoint instruction. ADDR is
2252 the target location in the target machine. CONTENTS_CACHE is a
2253 pointer to memory allocated for saving the target contents. It is
2254 guaranteed by the caller to be long enough to save the breakpoint
2255 length returned by BREAKPOINT_FROM_PC. */
2258 mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2260 if (monitor_supports_breakpoints)
2261 return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2263 return memory_insert_breakpoint (addr, contents_cache);
2267 mips_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2269 if (monitor_supports_breakpoints)
2270 return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2272 return memory_remove_breakpoint (addr, contents_cache);
2275 #if 0 /* currently not used */
2276 /* PMON does not currently provide support for the debug mode 'b'
2277 commands to manipulate breakpoints. However, if we wanted to use
2278 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2279 then this code performs the work needed to leave debug mode,
2280 set/clear the breakpoint, and then return to debug mode. */
2282 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2283 static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
2284 /* NOTE: The code relies on this vector being zero-initialised by the system */
2287 pmon_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2291 if (monitor_supports_breakpoints)
2293 char tbuff[12]; /* space for breakpoint command */
2297 /* PMON does not support debug level breakpoint set/remove: */
2298 if (mips_exit_debug ())
2299 mips_error ("Failed to exit debug mode");
2301 sprintf (tbuff, "b %08x\r", addr);
2302 mips_send_command (tbuff, 0);
2304 mips_expect ("Bpt ");
2306 if (!mips_getstring (tbuff, remote_timeout))
2308 tbuff[2] = '\0'; /* terminate the string */
2309 if (sscanf (tbuff, "%d", &bpnum) != 1)
2311 fprintf_unfiltered (gdb_stderr,
2312 "Invalid decimal breakpoint number from target: %s\n", tbuff);
2316 mips_expect (" = ");
2318 /* Lead in the hex number we are expecting: */
2322 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2323 which targets return 64-bit addresses? PMON returns only 32! */
2324 if (!mips_getstring (&tbuff[2], 8))
2326 tbuff[10] = '\0'; /* terminate the string */
2328 if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
2330 fprintf_unfiltered (gdb_stderr,
2331 "Invalid hex address from target: %s\n", tbuff);
2335 if (bpnum >= PMON_MAX_BP)
2337 fprintf_unfiltered (gdb_stderr,
2338 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2339 bpnum, PMON_MAX_BP - 1);
2344 fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
2346 mips_pmon_bp_info[bpnum] = bpaddr;
2348 mips_expect ("\r\n");
2349 mips_expect (mips_monitor_prompt);
2351 mips_enter_debug ();
2356 return mips_store_word (addr, BREAK_INSN, contents_cache);
2360 pmon_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2362 if (monitor_supports_breakpoints)
2365 char tbuff[7]; /* enough for delete breakpoint command */
2367 for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
2368 if (mips_pmon_bp_info[bpnum] == addr)
2371 if (bpnum >= PMON_MAX_BP)
2373 fprintf_unfiltered (gdb_stderr,
2374 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2379 if (mips_exit_debug ())
2380 mips_error ("Failed to exit debug mode");
2382 sprintf (tbuff, "db %02d\r", bpnum);
2384 mips_send_command (tbuff, -1);
2385 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2386 set" message will be returned. */
2388 mips_enter_debug ();
2393 return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
2398 /* Tell whether this target can support a hardware breakpoint. CNT
2399 is the number of hardware breakpoints already installed. This
2400 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2403 mips_can_use_watchpoint (int type, int cnt, int othertype)
2405 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2409 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2410 This is used for memory ref breakpoints. */
2412 static unsigned long
2413 calculate_mask (CORE_ADDR addr, int len)
2418 mask = addr ^ (addr + len - 1);
2420 for (i = 32; i >= 0; i--)
2426 mask = (unsigned long) 0xffffffff >> i;
2432 /* Insert a hardware breakpoint. This works only on LSI targets, which
2433 implement ordinary breakpoints using hardware facilities. */
2436 remote_mips_insert_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2438 if (strcmp (target_shortname, "lsi") == 0)
2439 return mips_insert_breakpoint (addr, contents_cache);
2445 /* Remove a hardware breakpoint. This works only on LSI targets, which
2446 implement ordinary breakpoints using hardware facilities. */
2449 remote_mips_remove_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2451 if (strcmp (target_shortname, "lsi") == 0)
2452 return mips_remove_breakpoint (addr, contents_cache);
2457 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2458 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2462 mips_insert_watchpoint (CORE_ADDR addr, int len, int type)
2464 if (set_breakpoint (addr, len, type))
2471 mips_remove_watchpoint (CORE_ADDR addr, int len, int type)
2473 if (clear_breakpoint (addr, len, type))
2480 mips_stopped_by_watchpoint (void)
2482 return hit_watchpoint;
2486 /* Insert a breakpoint. */
2489 set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2491 return common_breakpoint (1, addr, len, type);
2495 /* Clear a breakpoint. */
2498 clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2500 return common_breakpoint (0, addr, len, type);
2504 /* Check the error code from the return packet for an LSI breakpoint
2505 command. If there's no error, just return 0. If it's a warning,
2506 print the warning text and return 0. If it's an error, print
2507 the error text and return 1. <ADDR> is the address of the breakpoint
2508 that was being set. <RERRFLG> is the error code returned by PMON.
2509 This is a helper function for common_breakpoint. */
2512 check_lsi_error (CORE_ADDR addr, int rerrflg)
2514 struct lsi_error *err;
2515 char *saddr = paddr_nz (addr); /* printable address string */
2517 if (rerrflg == 0) /* no error */
2520 /* Warnings can be ORed together, so check them all. */
2521 if (rerrflg & W_WARN)
2523 if (monitor_warnings)
2526 for (err = lsi_warning_table; err->code != 0; err++)
2528 if ((err->code & rerrflg) == err->code)
2531 fprintf_unfiltered (gdb_stderr,
2532 "common_breakpoint (0x%s): Warning: %s\n",
2538 fprintf_unfiltered (gdb_stderr,
2539 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2546 /* Errors are unique, i.e. can't be ORed together. */
2547 for (err = lsi_error_table; err->code != 0; err++)
2549 if ((err->code & rerrflg) == err->code)
2551 fprintf_unfiltered (gdb_stderr,
2552 "common_breakpoint (0x%s): Error: %s\n",
2558 fprintf_unfiltered (gdb_stderr,
2559 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2566 /* This routine sends a breakpoint command to the remote target.
2568 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2569 <ADDR> is the address of the breakpoint.
2570 <LEN> the length of the region to break on.
2571 <TYPE> is the type of breakpoint:
2572 0 = write (BREAK_WRITE)
2573 1 = read (BREAK_READ)
2574 2 = read/write (BREAK_ACCESS)
2575 3 = instruction fetch (BREAK_FETCH)
2577 Return 0 if successful; otherwise 1. */
2580 common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2582 char buf[DATA_MAXLEN + 1];
2584 int rpid, rerrflg, rresponse, rlen;
2587 addr = ADDR_BITS_REMOVE (addr);
2589 if (mips_monitor == MON_LSI)
2591 if (set == 0) /* clear breakpoint */
2593 /* The LSI PMON "clear breakpoint" has this form:
2594 <pid> 'b' <bptn> 0x0
2596 <pid> 'b' 0x0 <code>
2598 <bptn> is a breakpoint number returned by an earlier 'B' command.
2599 Possible return codes: OK, E_BPT. */
2603 /* Search for the breakpoint in the table. */
2604 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2605 if (lsi_breakpoints[i].type == type
2606 && lsi_breakpoints[i].addr == addr
2607 && lsi_breakpoints[i].len == len)
2610 /* Clear the table entry and tell PMON to clear the breakpoint. */
2611 if (i == MAX_LSI_BREAKPOINTS)
2613 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2618 lsi_breakpoints[i].type = BREAK_UNUSED;
2619 sprintf (buf, "0x0 b 0x%x 0x0", i);
2620 mips_send_packet (buf, 1);
2622 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2625 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2627 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2629 return (check_lsi_error (addr, rerrflg));
2632 /* set a breakpoint */
2634 /* The LSI PMON "set breakpoint" command has this form:
2635 <pid> 'B' <addr> 0x0
2637 <pid> 'B' <bptn> <code>
2639 The "set data breakpoint" command has this form:
2641 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2643 where: type= "0x1" = read
2645 "0x3" = access (read or write)
2647 The reply returns two values:
2648 bptn - a breakpoint number, which is a small integer with
2649 possible values of zero through 255.
2650 code - an error return code, a value of zero indicates a
2651 succesful completion, other values indicate various
2652 errors and warnings.
2654 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2658 if (type == BREAK_FETCH) /* instruction breakpoint */
2661 sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr));
2667 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr),
2668 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2669 paddr_nz (addr + len - 1));
2671 mips_send_packet (buf, 1);
2673 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2676 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2677 &rpid, &rcmd, &rresponse, &rerrflg);
2678 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2679 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2682 if (check_lsi_error (addr, rerrflg))
2685 /* rresponse contains PMON's breakpoint number. Record the
2686 information for this breakpoint so we can clear it later. */
2687 lsi_breakpoints[rresponse].type = type;
2688 lsi_breakpoints[rresponse].addr = addr;
2689 lsi_breakpoints[rresponse].len = len;
2696 /* On non-LSI targets, the breakpoint command has this form:
2697 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2698 <MASK> is a don't care mask for addresses.
2699 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2703 mask = calculate_mask (addr, len);
2706 if (set) /* set a breakpoint */
2711 case BREAK_WRITE: /* write */
2714 case BREAK_READ: /* read */
2717 case BREAK_ACCESS: /* read/write */
2720 case BREAK_FETCH: /* fetch */
2724 internal_error (__FILE__, __LINE__, "failed internal consistency check");
2728 sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr),
2729 paddr_nz (mask), flags);
2734 sprintf (buf, "0x0 b 0x%s", paddr_nz (addr));
2737 mips_send_packet (buf, 1);
2739 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2742 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2743 &rpid, &rcmd, &rerrflg, &rresponse);
2745 if (nfields != 4 || rcmd != cmd)
2746 mips_error ("common_breakpoint: Bad response from remote board: %s",
2751 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2752 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2753 if (mips_monitor == MON_DDB)
2754 rresponse = rerrflg;
2755 if (rresponse != 22) /* invalid argument */
2756 fprintf_unfiltered (gdb_stderr,
2757 "common_breakpoint (0x%s): Got error: 0x%x\n",
2758 paddr_nz (addr), rresponse);
2766 send_srec (char *srec, int len, CORE_ADDR addr)
2772 serial_write (mips_desc, srec, len);
2774 ch = mips_readchar (remote_timeout);
2778 case SERIAL_TIMEOUT:
2779 error ("Timeout during download.");
2783 case 0x15: /* NACK */
2784 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr));
2787 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2792 /* Download a binary file by converting it to S records. */
2795 mips_load_srec (char *args)
2799 char *buffer, srec[1024];
2801 unsigned int srec_frame = 200;
2803 static int hashmark = 1;
2805 buffer = alloca (srec_frame * 2 + 256);
2807 abfd = bfd_openr (args, 0);
2810 printf_filtered ("Unable to open file %s\n", args);
2814 if (bfd_check_format (abfd, bfd_object) == 0)
2816 printf_filtered ("File is not an object file\n");
2820 /* This actually causes a download in the IDT binary format: */
2821 mips_send_command (LOAD_CMD, 0);
2823 for (s = abfd->sections; s; s = s->next)
2825 if (s->flags & SEC_LOAD)
2827 unsigned int numbytes;
2829 /* FIXME! vma too small????? */
2830 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2832 (long) (s->vma + s->_raw_size));
2833 gdb_flush (gdb_stdout);
2835 for (i = 0; i < s->_raw_size; i += numbytes)
2837 numbytes = min (srec_frame, s->_raw_size - i);
2839 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2841 reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
2842 send_srec (srec, reclen, s->vma + i);
2844 if (ui_load_progress_hook)
2845 ui_load_progress_hook (s->name, i);
2849 putchar_unfiltered ('#');
2850 gdb_flush (gdb_stdout);
2853 } /* Per-packet (or S-record) loop */
2855 putchar_unfiltered ('\n');
2856 } /* Loadable sections */
2859 putchar_unfiltered ('\n');
2861 /* Write a type 7 terminator record. no data for a type 7, and there
2862 is no data, so len is 0. */
2864 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2866 send_srec (srec, reclen, abfd->start_address);
2868 serial_flush_input (mips_desc);
2872 * mips_make_srec -- make an srecord. This writes each line, one at a
2873 * time, each with it's own header and trailer line.
2874 * An srecord looks like this:
2876 * byte count-+ address
2877 * start ---+ | | data +- checksum
2879 * S01000006F6B692D746573742E73726563E4
2880 * S315000448600000000000000000FC00005900000000E9
2881 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2882 * S30B0004485A0000000000004E
2885 * S<type><length><address><data><checksum>
2889 * is the number of bytes following upto the checksum. Note that
2890 * this is not the number of chars following, since it takes two
2891 * chars to represent a byte.
2895 * 1) two byte address data record
2896 * 2) three byte address data record
2897 * 3) four byte address data record
2898 * 7) four byte address termination record
2899 * 8) three byte address termination record
2900 * 9) two byte address termination record
2903 * is the start address of the data following, or in the case of
2904 * a termination record, the start address of the image
2908 * is the sum of all the raw byte data in the record, from the length
2909 * upwards, modulo 256 and subtracted from 255.
2911 * This routine returns the length of the S-record.
2916 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2919 unsigned char checksum;
2922 /* Create the header for the srec. addr_size is the number of bytes in the address,
2923 and 1 is the number of bytes in the count. */
2925 /* FIXME!! bigger buf required for 64-bit! */
2928 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2929 /* This assumes S3 style downloads (4byte addresses). There should
2930 probably be a check, or the code changed to make it more
2932 buf[3] = memaddr >> 24;
2933 buf[4] = memaddr >> 16;
2934 buf[5] = memaddr >> 8;
2936 memcpy (&buf[7], myaddr, len);
2938 /* Note that the checksum is calculated on the raw data, not the
2939 hexified data. It includes the length, address and the data
2940 portions of the packet. */
2942 buf += 2; /* Point at length byte */
2943 for (i = 0; i < len + 4 + 1; i++)
2951 /* The following manifest controls whether we enable the simple flow
2952 control support provided by the monitor. If enabled the code will
2953 wait for an affirmative ACK between transmitting packets. */
2954 #define DOETXACK (1)
2956 /* The PMON fast-download uses an encoded packet format constructed of
2957 3byte data packets (encoded as 4 printable ASCII characters), and
2958 escape sequences (preceded by a '/'):
2961 'C' compare checksum (12bit value, not included in checksum calculation)
2962 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2963 'Z' zero fill multiple of 3bytes
2964 'B' byte (12bit encoded value, of 8bit data)
2965 'A' address (36bit encoded value)
2966 'E' define entry as original address, and exit load
2968 The packets are processed in 4 character chunks, so the escape
2969 sequences that do not have any data (or variable length data)
2970 should be padded to a 4 character boundary. The decoder will give
2971 an error if the complete message block size is not a multiple of
2972 4bytes (size of record).
2974 The encoding of numbers is done in 6bit fields. The 6bit value is
2975 used to index into this string to get the specific character
2976 encoding for the value: */
2977 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2979 /* Convert the number of bits required into an encoded number, 6bits
2980 at a time (range 0..63). Keep a checksum if required (passed
2981 pointer non-NULL). The function returns the number of encoded
2982 characters written into the buffer. */
2984 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2986 int count = (n / 6);
2990 fprintf_unfiltered (gdb_stderr,
2991 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
2996 fprintf_unfiltered (gdb_stderr,
2997 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
3001 /* Deal with the checksum: */
3007 *chksum += ((v >> 24) & 0xFFF);
3009 *chksum += ((v >> 12) & 0xFFF);
3011 *chksum += ((v >> 0) & 0xFFF);
3018 *p++ = encoding[(v >> n) & 0x3F];
3025 /* Shorthand function (that could be in-lined) to output the zero-fill
3026 escape sequence into the data stream. */
3028 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
3032 sprintf (*buff, "/Z");
3033 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3034 *buff += (count + 2);
3036 return (recsize + count + 2);
3040 pmon_checkset (int recsize, char **buff, int *value)
3044 /* Add the checksum (without updating the value): */
3045 sprintf (*buff, "/C");
3046 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3047 *buff += (count + 2);
3048 sprintf (*buff, "\n");
3049 *buff += 2; /* include zero terminator */
3050 /* Forcing a checksum validation clears the sum: */
3052 return (recsize + count + 3);
3055 /* Amount of padding we leave after at the end of the output buffer,
3056 for the checksum and line termination characters: */
3057 #define CHECKSIZE (4 + 4 + 4 + 2)
3058 /* zero-fill, checksum, transfer end and line termination space. */
3060 /* The amount of binary data loaded from the object file in a single
3062 #define BINCHUNK (1024)
3064 /* Maximum line of data accepted by the monitor: */
3065 #define MAXRECSIZE (550)
3066 /* NOTE: This constant depends on the monitor being used. This value
3067 is for PMON 5.x on the Cogent Vr4300 board. */
3070 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3071 int inamount, int *recsize, unsigned int *csum,
3072 unsigned int *zerofill)
3077 /* This is a simple check to ensure that our data will fit within
3078 the maximum allowable record size. Each record output is 4bytes
3079 in length. We must allow space for a pending zero fill command,
3080 the record, and a checksum record. */
3081 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3083 /* Process the binary data: */
3084 if ((inamount - *inptr) < 3)
3087 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3089 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3091 *recsize += (2 + count);
3096 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3097 /* Simple check for zero data. TODO: A better check would be
3098 to check the last, and then the middle byte for being zero
3099 (if the first byte is not). We could then check for
3100 following runs of zeros, and if above a certain size it is
3101 worth the 4 or 8 character hit of the byte insertions used
3102 to pad to the start of the zeroes. NOTE: This also depends
3103 on the alignment at the end of the zero run. */
3104 if (value == 0x00000000)
3107 if (*zerofill == 0xFFF) /* 12bit counter */
3108 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3113 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3114 count = pmon_makeb64 (value, p, 24, csum);
3127 pmon_check_ack (char *mesg)
3129 #if defined(DOETXACK)
3134 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3136 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3138 fprintf_unfiltered (gdb_stderr,
3139 "Failed to receive valid ACK for %s\n", mesg);
3140 return (-1); /* terminate the download */
3143 #endif /* DOETXACK */
3147 /* pmon_download - Send a sequence of characters to the PMON download port,
3148 which is either a serial port or a UDP socket. */
3151 pmon_start_download (void)
3155 /* Create the temporary download file. */
3156 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3157 perror_with_name (tftp_localname);
3161 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3162 mips_expect ("Downloading from ");
3163 mips_expect (udp_in_use ? "udp" : "tty0");
3164 mips_expect (", ^C to abort\r\n");
3169 mips_expect_download (char *string)
3171 if (!mips_expect (string))
3173 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3175 remove (tftp_localname); /* Remove temporary file */
3183 pmon_check_entry_address (char *entry_address, int final)
3185 char hexnumber[9]; /* includes '\0' space */
3186 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3187 sprintf (hexnumber, "%x", final);
3188 mips_expect (hexnumber);
3189 mips_expect ("\r\n");
3193 pmon_check_total (int bintotal)
3195 char hexnumber[9]; /* includes '\0' space */
3196 mips_expect ("\r\ntotal = 0x");
3197 sprintf (hexnumber, "%x", bintotal);
3198 mips_expect (hexnumber);
3199 return mips_expect_download (" bytes\r\n");
3203 pmon_end_download (int final, int bintotal)
3205 char hexnumber[9]; /* includes '\0' space */
3209 static char *load_cmd_prefix = "load -b -s ";
3213 /* Close off the temporary file containing the load data. */
3217 /* Make the temporary file readable by the world. */
3218 if (stat (tftp_localname, &stbuf) == 0)
3219 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3221 /* Must reinitialize the board to prevent PMON from crashing. */
3222 mips_send_command ("initEther\r", -1);
3224 /* Send the load command. */
3225 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3226 strcpy (cmd, load_cmd_prefix);
3227 strcat (cmd, tftp_name);
3229 mips_send_command (cmd, 0);
3231 if (!mips_expect_download ("Downloading from "))
3233 if (!mips_expect_download (tftp_name))
3235 if (!mips_expect_download (", ^C to abort\r\n"))
3239 /* Wait for the stuff that PMON prints after the load has completed.
3240 The timeout value for use in the tftp case (15 seconds) was picked
3241 arbitrarily but might be too small for really large downloads. FIXME. */
3242 switch (mips_monitor)
3245 pmon_check_ack ("termination");
3246 pmon_check_entry_address ("Entry address is ", final);
3247 if (!pmon_check_total (bintotal))
3251 pmon_check_entry_address ("Entry Address = ", final);
3252 pmon_check_ack ("termination");
3253 if (!pmon_check_total (bintotal))
3259 remove (tftp_localname); /* Remove temporary file */
3263 pmon_download (char *buffer, int length)
3266 fwrite (buffer, 1, length, tftp_file);
3268 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3272 pmon_load_fast (char *file)
3276 unsigned char *binbuf;
3279 unsigned int csum = 0;
3280 int hashmark = !tftp_in_use;
3285 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3286 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3288 abfd = bfd_openr (file, 0);
3291 printf_filtered ("Unable to open file %s\n", file);
3295 if (bfd_check_format (abfd, bfd_object) == 0)
3297 printf_filtered ("File is not an object file\n");
3301 /* Setup the required download state: */
3302 mips_send_command ("set dlproto etxack\r", -1);
3303 mips_send_command ("set dlecho off\r", -1);
3304 /* NOTE: We get a "cannot set variable" message if the variable is
3305 already defined to have the argument we give. The code doesn't
3306 care, since it just scans to the next prompt anyway. */
3307 /* Start the download: */
3308 pmon_start_download ();
3310 /* Zero the checksum */
3311 sprintf (buffer, "/Kxx\n");
3312 reclen = strlen (buffer);
3313 pmon_download (buffer, reclen);
3314 finished = pmon_check_ack ("/Kxx");
3316 for (s = abfd->sections; s && !finished; s = s->next)
3317 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3319 bintotal += s->_raw_size;
3320 final = (s->vma + s->_raw_size);
3322 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3323 (unsigned int) (s->vma + s->_raw_size));
3324 gdb_flush (gdb_stdout);
3326 /* Output the starting address */
3327 sprintf (buffer, "/A");
3328 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3329 buffer[2 + reclen] = '\n';
3330 buffer[3 + reclen] = '\0';
3331 reclen += 3; /* for the initial escape code and carriage return */
3332 pmon_download (buffer, reclen);
3333 finished = pmon_check_ack ("/A");
3337 unsigned int binamount;
3338 unsigned int zerofill = 0;
3344 for (i = 0; ((i < s->_raw_size) && !finished); i += binamount)
3348 binamount = min (BINCHUNK, s->_raw_size - i);
3350 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3352 /* This keeps a rolling checksum, until we decide to output
3354 for (; ((binamount - binptr) > 0);)
3356 pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
3357 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3359 reclen = pmon_checkset (reclen, &bp, &csum);
3360 pmon_download (buffer, reclen);
3361 finished = pmon_check_ack ("data record");
3364 zerofill = 0; /* do not transmit pending zerofills */
3368 if (ui_load_progress_hook)
3369 ui_load_progress_hook (s->name, i);
3373 putchar_unfiltered ('#');
3374 gdb_flush (gdb_stdout);
3378 reclen = 0; /* buffer processed */
3383 /* Ensure no out-standing zerofill requests: */
3385 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3387 /* and then flush the line: */
3390 reclen = pmon_checkset (reclen, &bp, &csum);
3391 /* Currently pmon_checkset outputs the line terminator by
3392 default, so we write out the buffer so far: */
3393 pmon_download (buffer, reclen);
3394 finished = pmon_check_ack ("record remnant");
3398 putchar_unfiltered ('\n');
3401 /* Terminate the transfer. We know that we have an empty output
3402 buffer at this point. */
3403 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3404 reclen = strlen (buffer);
3405 pmon_download (buffer, reclen);
3408 { /* Ignore the termination message: */
3409 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3412 { /* Deal with termination message: */
3413 pmon_end_download (final, bintotal);
3419 /* mips_load -- download a file. */
3422 mips_load (char *file, int from_tty)
3424 /* Get the board out of remote debugging mode. */
3425 if (mips_exit_debug ())
3426 error ("mips_load: Couldn't get into monitor mode.");
3428 if (mips_monitor != MON_IDT)
3429 pmon_load_fast (file);
3431 mips_load_srec (file);
3435 /* Finally, make the PC point at the start address */
3436 if (mips_monitor != MON_IDT)
3438 /* Work around problem where PMON monitor updates the PC after a load
3439 to a different value than GDB thinks it has. The following ensures
3440 that the write_pc() WILL update the PC value: */
3441 deprecated_register_valid[PC_REGNUM] = 0;
3444 write_pc (bfd_get_start_address (exec_bfd));
3446 inferior_ptid = null_ptid; /* No process now */
3448 /* This is necessary because many things were based on the PC at the time that
3449 we attached to the monitor, which is no longer valid now that we have loaded
3450 new code (and just changed the PC). Another way to do this might be to call
3451 normal_stop, except that the stack may not be valid, and things would get
3452 horribly confused... */
3454 clear_symtab_users ();
3458 /* Pass the command argument as a packet to PMON verbatim. */
3461 pmon_command (char *args, int from_tty)
3463 char buf[DATA_MAXLEN + 1];
3466 sprintf (buf, "0x0 %s", args);
3467 mips_send_packet (buf, 1);
3468 printf_filtered ("Send packet: %s\n", buf);
3470 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3472 printf_filtered ("Received packet: %s\n", buf);
3475 extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */
3478 _initialize_remote_mips (void)
3480 /* Initialize the fields in mips_ops that are common to all four targets. */
3481 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3482 mips_ops.to_close = mips_close;
3483 mips_ops.to_detach = mips_detach;
3484 mips_ops.to_resume = mips_resume;
3485 mips_ops.to_fetch_registers = mips_fetch_registers;
3486 mips_ops.to_store_registers = mips_store_registers;
3487 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3488 mips_ops.to_xfer_memory = mips_xfer_memory;
3489 mips_ops.to_files_info = mips_files_info;
3490 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3491 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3492 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3493 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3494 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3495 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3496 mips_ops.to_kill = mips_kill;
3497 mips_ops.to_load = mips_load;
3498 mips_ops.to_create_inferior = mips_create_inferior;
3499 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3500 mips_ops.to_stratum = process_stratum;
3501 mips_ops.to_has_all_memory = 1;
3502 mips_ops.to_has_memory = 1;
3503 mips_ops.to_has_stack = 1;
3504 mips_ops.to_has_registers = 1;
3505 mips_ops.to_has_execution = 1;
3506 mips_ops.to_magic = OPS_MAGIC;
3508 /* Copy the common fields to all four target vectors. */
3509 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3511 /* Initialize target-specific fields in the target vectors. */
3512 mips_ops.to_shortname = "mips";
3513 mips_ops.to_doc = "\
3514 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3515 The argument is the device it is connected to or, if it contains a colon,\n\
3516 HOST:PORT to access a board over a network";
3517 mips_ops.to_open = mips_open;
3518 mips_ops.to_wait = mips_wait;
3520 pmon_ops.to_shortname = "pmon";
3521 pmon_ops.to_doc = "\
3522 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3523 line. The argument is the device it is connected to or, if it contains a\n\
3524 colon, HOST:PORT to access a board over a network";
3525 pmon_ops.to_open = pmon_open;
3526 pmon_ops.to_wait = mips_wait;
3528 ddb_ops.to_shortname = "ddb";
3530 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3531 line. The first argument is the device it is connected to or, if it contains\n\
3532 a colon, HOST:PORT to access a board over a network. The optional second\n\
3533 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3534 TFTP downloads to the board. The optional third parameter is the local name\n\
3535 of the TFTP temporary file, if it differs from the filename seen by the board.";
3536 ddb_ops.to_open = ddb_open;
3537 ddb_ops.to_wait = mips_wait;
3539 lsi_ops.to_shortname = "lsi";
3540 lsi_ops.to_doc = pmon_ops.to_doc;
3541 lsi_ops.to_open = lsi_open;
3542 lsi_ops.to_wait = mips_wait;
3544 /* Add the targets. */
3545 add_target (&mips_ops);
3546 add_target (&pmon_ops);
3547 add_target (&ddb_ops);
3548 add_target (&lsi_ops);
3551 add_set_cmd ("timeout", no_class, var_zinteger,
3552 (char *) &mips_receive_wait,
3553 "Set timeout in seconds for remote MIPS serial I/O.",
3558 add_set_cmd ("retransmit-timeout", no_class, var_zinteger,
3559 (char *) &mips_retransmit_wait,
3560 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3561 This is the number of seconds to wait for an acknowledgement to a packet\n\
3562 before resending the packet.", &setlist),
3566 add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
3567 (char *) &mips_syn_garbage,
3568 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3569 This is the maximum number of characters GDB will ignore when trying to\n\
3570 synchronize with the remote system. A value of -1 means that there is no limit\n\
3571 (Note that these characters are printed out even though they are ignored.)",
3576 (add_set_cmd ("monitor-prompt", class_obscure, var_string,
3577 (char *) &mips_monitor_prompt,
3578 "Set the prompt that GDB expects from the monitor.",
3583 add_set_cmd ("monitor-warnings", class_obscure, var_zinteger,
3584 (char *) &monitor_warnings,
3585 "Set printing of monitor warnings.\n"
3586 "When enabled, monitor warnings about hardware breakpoints "
3587 "will be displayed.",
3591 add_com ("pmon <command>", class_obscure, pmon_command,
3592 "Send a packet to PMON (must be in debug mode).");
3594 add_show_from_set (add_set_cmd ("mask-address", no_class,
3595 var_boolean, &mask_address_p,
3596 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3597 Use \"on\" to enable the masking and \"off\" to disable it.\n",