1 /* Remote debugging interface for MIPS remote debugging protocol.
2 Copyright 1993, 1994, 1995, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by Ian Lance Taylor
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
32 #include "remote-utils.h"
33 #include "gdb_string.h"
36 #include <sys/types.h>
41 /* Microsoft C's stat.h doesn't define all the POSIX file modes. */
43 #define S_IROTH S_IREAD
48 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
49 types passed by breakpoint.c to target_insert_watchpoint.
50 Value 3 is our own invention, and is used for ordinary instruction
51 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
61 /* Prototypes for local functions. */
63 static int mips_readchar (int timeout);
65 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
68 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
69 int *pch, int timeout);
71 static int mips_cksum (const unsigned char *hdr,
72 const unsigned char *data, int len);
74 static void mips_send_packet (const char *s, int get_ack);
76 static void mips_send_command (const char *cmd, int prompt);
78 static int mips_receive_packet (char *buff, int throw_error, int timeout);
80 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
81 int *perr, int timeout, char *buff);
83 static void mips_initialize (void);
85 static void mips_open (char *name, int from_tty);
87 static void pmon_open (char *name, int from_tty);
89 static void ddb_open (char *name, int from_tty);
91 static void lsi_open (char *name, int from_tty);
93 static void mips_close (int quitting);
95 static void mips_detach (char *args, int from_tty);
97 static void mips_resume (int pid, int step, enum target_signal siggnal);
99 static int mips_wait (int pid, struct target_waitstatus *status);
101 static int mips_map_regno (int regno);
103 static void mips_fetch_registers (int regno);
105 static void mips_prepare_to_store (void);
107 static void mips_store_registers (int regno);
109 static unsigned int mips_fetch_word (CORE_ADDR addr);
111 static int mips_store_word (CORE_ADDR addr, unsigned int value,
114 static int mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
116 struct mem_attrib *attrib,
117 struct target_ops *target);
119 static void mips_files_info (struct target_ops *ignore);
121 static void mips_create_inferior (char *execfile, char *args, char **env);
123 static void mips_mourn_inferior (void);
125 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
127 static int pmon_zeroset (int recsize, char **buff, int *amount,
128 unsigned int *chksum);
130 static int pmon_checkset (int recsize, char **buff, int *value);
132 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
133 int *inptr, int inamount, int *recsize,
134 unsigned int *csum, unsigned int *zerofill);
136 static int pmon_check_ack (char *mesg);
138 static void pmon_start_download (void);
140 static void pmon_end_download (int final, int bintotal);
142 static void pmon_download (char *buffer, int length);
144 static void pmon_load_fast (char *file);
146 static void mips_load (char *file, int from_tty);
148 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
149 unsigned char *myaddr, int len);
151 static int set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
153 static int clear_breakpoint (CORE_ADDR addr, int len, enum break_type type);
155 static int common_breakpoint (int set, CORE_ADDR addr, int len,
156 enum break_type type);
158 /* Forward declarations. */
159 extern struct target_ops mips_ops;
160 extern struct target_ops pmon_ops;
161 extern struct target_ops ddb_ops;
163 /* The MIPS remote debugging interface is built on top of a simple
164 packet protocol. Each packet is organized as follows:
166 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
167 may not appear anywhere else in the packet. Any time a SYN is
168 seen, a new packet should be assumed to have begun.
171 This byte contains the upper five bits of the logical length
172 of the data section, plus a single bit indicating whether this
173 is a data packet or an acknowledgement. The documentation
174 indicates that this bit is 1 for a data packet, but the actual
175 board uses 1 for an acknowledgement. The value of the byte is
176 0x40 + (ack ? 0x20 : 0) + (len >> 6)
177 (we always have 0 <= len < 1024). Acknowledgement packets do
178 not carry data, and must have a data length of 0.
180 LEN1 This byte contains the lower six bits of the logical length of
181 the data section. The value is
184 SEQ This byte contains the six bit sequence number of the packet.
187 An acknowlegment packet contains the sequence number of the
188 packet being acknowledged plus 1 modulo 64. Data packets are
189 transmitted in sequence. There may only be one outstanding
190 unacknowledged data packet at a time. The sequence numbers
191 are independent in each direction. If an acknowledgement for
192 the previous packet is received (i.e., an acknowledgement with
193 the sequence number of the packet just sent) the packet just
194 sent should be retransmitted. If no acknowledgement is
195 received within a timeout period, the packet should be
196 retransmitted. This has an unfortunate failure condition on a
197 high-latency line, as a delayed acknowledgement may lead to an
198 endless series of duplicate packets.
200 DATA The actual data bytes follow. The following characters are
201 escaped inline with DLE (ASCII 020, or ^P):
207 The additional DLE characters are not counted in the logical
208 length stored in the TYPE_LEN and LEN1 bytes.
213 These bytes contain an 18 bit checksum of the complete
214 contents of the packet excluding the SEQ byte and the
215 CSUM[123] bytes. The checksum is simply the twos complement
216 addition of all the bytes treated as unsigned characters. The
217 values of the checksum bytes are:
218 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
219 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
220 CSUM3: 0x40 + (cksum & 0x3f)
222 It happens that the MIPS remote debugging protocol always
223 communicates with ASCII strings. Because of this, this
224 implementation doesn't bother to handle the DLE quoting mechanism,
225 since it will never be required. */
229 /* The SYN character which starts each packet. */
232 /* The 0x40 used to offset each packet (this value ensures that all of
233 the header and trailer bytes, other than SYN, are printable ASCII
235 #define HDR_OFFSET 0x40
237 /* The indices of the bytes in the packet header. */
238 #define HDR_INDX_SYN 0
239 #define HDR_INDX_TYPE_LEN 1
240 #define HDR_INDX_LEN1 2
241 #define HDR_INDX_SEQ 3
244 /* The data/ack bit in the TYPE_LEN header byte. */
245 #define TYPE_LEN_DA_BIT 0x20
246 #define TYPE_LEN_DATA 0
247 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
249 /* How to compute the header bytes. */
250 #define HDR_SET_SYN(data, len, seq) (SYN)
251 #define HDR_SET_TYPE_LEN(data, len, seq) \
253 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
254 + (((len) >> 6) & 0x1f))
255 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
256 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
258 /* Check that a header byte is reasonable. */
259 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
261 /* Get data from the header. These macros evaluate their argument
263 #define HDR_IS_DATA(hdr) \
264 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
265 #define HDR_GET_LEN(hdr) \
266 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
267 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
269 /* The maximum data length. */
270 #define DATA_MAXLEN 1023
272 /* The trailer offset. */
273 #define TRLR_OFFSET HDR_OFFSET
275 /* The indices of the bytes in the packet trailer. */
276 #define TRLR_INDX_CSUM1 0
277 #define TRLR_INDX_CSUM2 1
278 #define TRLR_INDX_CSUM3 2
279 #define TRLR_LENGTH 3
281 /* How to compute the trailer bytes. */
282 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
283 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
284 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
286 /* Check that a trailer byte is reasonable. */
287 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
289 /* Get data from the trailer. This evaluates its argument multiple
291 #define TRLR_GET_CKSUM(trlr) \
292 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
293 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
294 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
296 /* The sequence number modulos. */
297 #define SEQ_MODULOS (64)
299 /* PMON commands to load from the serial port or UDP socket. */
300 #define LOAD_CMD "load -b -s tty0\r"
301 #define LOAD_CMD_UDP "load -b -s udp\r"
303 /* The target vectors for the four different remote MIPS targets.
304 These are initialized with code in _initialize_remote_mips instead
305 of static initializers, to make it easier to extend the target_ops
307 struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops;
309 enum mips_monitor_type
311 /* IDT/SIM monitor being used: */
313 /* PMON monitor being used: */
314 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
315 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
316 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
317 /* Last and unused value, for sizing vectors, etc. */
320 static enum mips_monitor_type mips_monitor = MON_LAST;
322 /* The monitor prompt text. If the user sets the PMON prompt
323 to some new value, the GDB `set monitor-prompt' command must also
324 be used to inform GDB about the expected prompt. Otherwise, GDB
325 will not be able to connect to PMON in mips_initialize().
326 If the `set monitor-prompt' command is not used, the expected
327 default prompt will be set according the target:
334 static char *mips_monitor_prompt;
336 /* Set to 1 if the target is open. */
337 static int mips_is_open;
339 /* Currently active target description (if mips_is_open == 1) */
340 static struct target_ops *current_ops;
342 /* Set to 1 while the connection is being initialized. */
343 static int mips_initializing;
345 /* Set to 1 while the connection is being brought down. */
346 static int mips_exiting;
348 /* The next sequence number to send. */
349 static unsigned int mips_send_seq;
351 /* The next sequence number we expect to receive. */
352 static unsigned int mips_receive_seq;
354 /* The time to wait before retransmitting a packet, in seconds. */
355 static int mips_retransmit_wait = 3;
357 /* The number of times to try retransmitting a packet before giving up. */
358 static int mips_send_retries = 10;
360 /* The number of garbage characters to accept when looking for an
361 SYN for the next packet. */
362 static int mips_syn_garbage = 10;
364 /* The time to wait for a packet, in seconds. */
365 static int mips_receive_wait = 5;
367 /* Set if we have sent a packet to the board but have not yet received
369 static int mips_need_reply = 0;
371 /* Handle used to access serial I/O stream. */
372 static serial_t mips_desc;
374 /* UDP handle used to download files to target. */
375 static serial_t udp_desc;
376 static int udp_in_use;
378 /* TFTP filename used to download files to DDB board, in the form
380 static char *tftp_name; /* host:filename */
381 static char *tftp_localname; /* filename portion of above */
382 static int tftp_in_use;
383 static FILE *tftp_file;
385 /* Counts the number of times the user tried to interrupt the target (usually
387 static int interrupt_count;
389 /* If non-zero, means that the target is running. */
390 static int mips_wait_flag = 0;
392 /* If non-zero, monitor supports breakpoint commands. */
393 static int monitor_supports_breakpoints = 0;
395 /* Data cache header. */
397 #if 0 /* not used (yet?) */
398 static DCACHE *mips_dcache;
401 /* Non-zero means that we've just hit a read or write watchpoint */
402 static int hit_watchpoint;
404 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
405 The table is indexed by a breakpoint number, which is an integer
406 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
408 #define MAX_LSI_BREAKPOINTS 256
409 struct lsi_breakpoint_info
411 enum break_type type; /* type of breakpoint */
412 CORE_ADDR addr; /* address of breakpoint */
413 int len; /* length of region being watched */
414 unsigned long value; /* value to watch */
416 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
418 /* Error/warning codes returned by LSI PMON for breakpoint commands.
419 Warning values may be ORed together; error values may not. */
420 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
421 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
422 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
423 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
425 #define E_ERR 0x200 /* This bit is set if the error code is an error */
426 #define E_BPT 0x200 /* error: No such breakpoint number */
427 #define E_RGE 0x201 /* error: Range is not supported */
428 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
429 #define E_OUT 0x203 /* error: Out of hardware resources */
430 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
434 int code; /* error code */
435 char *string; /* string associated with this code */
438 struct lsi_error lsi_warning_table[] =
440 {W_MSK, "Range feature is supported via mask"},
441 {W_VAL, "Value check is not supported in hardware"},
442 {W_QAL, "Requested qualifiers are not supported in hardware"},
446 struct lsi_error lsi_error_table[] =
448 {E_BPT, "No such breakpoint number"},
449 {E_RGE, "Range is not supported"},
450 {E_QAL, "The requested qualifiers can not be used"},
451 {E_OUT, "Out of hardware resources"},
452 {E_NON, "Hardware breakpoint not supported"},
456 /* Set to 1 with the 'set monitor-warnings' command to enable printing
457 of warnings returned by PMON when hardware breakpoints are used. */
458 static int monitor_warnings;
465 SERIAL_CLOSE (mips_desc);
469 SERIAL_CLOSE (udp_desc);
475 /* Handle low-level error that we can't recover from. Note that just
476 error()ing out from target_wait or some such low-level place will cause
477 all hell to break loose--the rest of GDB will tend to get left in an
478 inconsistent state. */
481 mips_error (char *string,...)
485 va_start (args, string);
487 target_terminal_ours ();
488 wrap_here (""); /* Force out any buffered output */
489 gdb_flush (gdb_stdout);
491 fprintf_filtered (gdb_stderr, error_pre_print);
492 vfprintf_filtered (gdb_stderr, string, args);
493 fprintf_filtered (gdb_stderr, "\n");
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 printf_unfiltered ("Ending remote MIPS debugging.\n");
503 target_mourn_inferior ();
505 return_to_top_level (RETURN_ERROR);
508 /* putc_readable - print a character, displaying non-printable chars in
509 ^x notation or in hex. */
512 fputc_readable (int ch, struct ui_file *file)
515 fputc_unfiltered ('\n', file);
517 fprintf_unfiltered (file, "\\r");
518 else if (ch < 0x20) /* ASCII control character */
519 fprintf_unfiltered (file, "^%c", ch + '@');
520 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
521 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
523 fputc_unfiltered (ch, file);
527 /* puts_readable - print a string, displaying non-printable chars in
528 ^x notation or in hex. */
531 fputs_readable (const char *string, struct ui_file *file)
535 while ((c = *string++) != '\0')
536 fputc_readable (c, file);
540 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
541 timed out. TIMEOUT specifies timeout value in seconds.
545 mips_expect_timeout (const char *string, int timeout)
547 const char *p = string;
551 fprintf_unfiltered (gdb_stdlog, "Expected \"");
552 fputs_readable (string, gdb_stdlog);
553 fprintf_unfiltered (gdb_stdlog, "\", got \"");
561 /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we
562 were waiting for the mips_monitor_prompt... */
564 c = SERIAL_READCHAR (mips_desc, timeout);
566 if (c == SERIAL_TIMEOUT)
569 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
574 fputc_readable (c, gdb_stdlog);
582 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
595 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
596 timed out. The timeout value is hard-coded to 2 seconds. Use
597 mips_expect_timeout if a different timeout value is needed.
601 mips_expect (const char *string)
603 return mips_expect_timeout (string, remote_timeout);
606 /* Read the required number of characters into the given buffer (which
607 is assumed to be large enough). The only failure is a timeout. */
609 mips_getstring (char *string, int n)
617 c = SERIAL_READCHAR (mips_desc, remote_timeout);
619 if (c == SERIAL_TIMEOUT)
621 fprintf_unfiltered (gdb_stderr,
622 "Failed to read %d characters from target (TIMEOUT)\n", n);
635 /* Read a character from the remote, aborting on error. Returns
636 SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR
637 returns). FIXME: If we see the string mips_monitor_prompt from
638 the board, then we are debugging on the main console port, and we
639 have somehow dropped out of remote debugging mode. In this case,
640 we automatically go back in to remote debugging mode. This is a
641 hack, put in because I can't find any way for a program running on
642 the remote board to terminate without also ending remote debugging
643 mode. I assume users won't have any trouble with this; for one
644 thing, the IDT documentation generally assumes that the remote
645 debugging port is not the console port. This is, however, very
646 convenient for DejaGnu when you only have one connected serial
650 mips_readchar (int timeout)
653 static int state = 0;
654 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
660 if (i == -1 && watchdog > 0)
664 if (state == mips_monitor_prompt_len)
666 ch = SERIAL_READCHAR (mips_desc, timeout);
668 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */
670 target_mourn_inferior ();
671 error ("Watchdog has expired. Target detached.\n");
674 if (ch == SERIAL_EOF)
675 mips_error ("End of file from remote");
676 if (ch == SERIAL_ERROR)
677 mips_error ("Error reading from remote: %s", safe_strerror (errno));
678 if (remote_debug > 1)
680 /* Don't use _filtered; we can't deal with a QUIT out of
681 target_wait, and I think this might be called from there. */
682 if (ch != SERIAL_TIMEOUT)
683 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
685 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
688 /* If we have seen mips_monitor_prompt and we either time out, or
689 we see a @ (which was echoed from a packet we sent), reset the
690 board as described above. The first character in a packet after
691 the SYN (which is not echoed) is always an @ unless the packet is
692 more than 64 characters long, which ours never are. */
693 if ((ch == SERIAL_TIMEOUT || ch == '@')
694 && state == mips_monitor_prompt_len
695 && !mips_initializing
698 if (remote_debug > 0)
699 /* Don't use _filtered; we can't deal with a QUIT out of
700 target_wait, and I think this might be called from there. */
701 fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n");
708 /* At this point, about the only thing we can do is abort the command
709 in progress and get back to command level as quickly as possible. */
711 error ("Remote board reset, debug protocol re-initialized.");
714 if (ch == mips_monitor_prompt[state])
722 /* Get a packet header, putting the data in the supplied buffer.
723 PGARBAGE is a pointer to the number of garbage characters received
724 so far. CH is the last character received. Returns 0 for success,
725 or -1 for timeout. */
728 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
734 /* Wait for a SYN. mips_syn_garbage is intended to prevent
735 sitting here indefinitely if the board sends us one garbage
736 character per second. ch may already have a value from the
737 last time through the loop. */
740 ch = mips_readchar (timeout);
741 if (ch == SERIAL_TIMEOUT)
745 /* Printing the character here lets the user of gdb see
746 what the program is outputting, if the debugging is
747 being done on the console port. Don't use _filtered:
748 we can't deal with a QUIT out of target_wait and
749 buffered target output confuses the user. */
750 if (!mips_initializing || remote_debug > 0)
752 if (isprint (ch) || isspace (ch))
754 fputc_unfiltered (ch, gdb_stdtarg);
758 fputc_readable (ch, gdb_stdtarg);
760 gdb_flush (gdb_stdtarg);
763 /* Only count unprintable characters. */
764 if (! (isprint (ch) || isspace (ch)))
767 if (mips_syn_garbage > 0
768 && *pgarbage > mips_syn_garbage)
769 mips_error ("Debug protocol failure: more than %d characters before a sync.",
774 /* Get the packet header following the SYN. */
775 for (i = 1; i < HDR_LENGTH; i++)
777 ch = mips_readchar (timeout);
778 if (ch == SERIAL_TIMEOUT)
780 /* Make sure this is a header byte. */
781 if (ch == SYN || !HDR_CHECK (ch))
787 /* If we got the complete header, we can return. Otherwise we
788 loop around and keep looking for SYN. */
794 /* Get a packet header, putting the data in the supplied buffer.
795 PGARBAGE is a pointer to the number of garbage characters received
796 so far. The last character read is returned in *PCH. Returns 0
797 for success, -1 for timeout, -2 for error. */
800 mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout)
805 for (i = 0; i < TRLR_LENGTH; i++)
807 ch = mips_readchar (timeout);
809 if (ch == SERIAL_TIMEOUT)
811 if (!TRLR_CHECK (ch))
818 /* Get the checksum of a packet. HDR points to the packet header.
819 DATA points to the packet data. LEN is the length of DATA. */
822 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
824 register const unsigned char *p;
830 /* The initial SYN is not included in the checksum. */
844 /* Send a packet containing the given ASCII string. */
847 mips_send_packet (const char *s, int get_ack)
849 /* unsigned */ int len;
850 unsigned char *packet;
855 if (len > DATA_MAXLEN)
856 mips_error ("MIPS protocol data packet too long: %s", s);
858 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
860 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
861 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
862 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
863 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
865 memcpy (packet + HDR_LENGTH, s, len);
867 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
868 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
869 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
870 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
872 /* Increment the sequence number. This will set mips_send_seq to
873 the sequence number we expect in the acknowledgement. */
874 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
876 /* We can only have one outstanding data packet, so we just wait for
877 the acknowledgement here. Keep retransmitting the packet until
878 we get one, or until we've tried too many times. */
879 for (try = 0; try < mips_send_retries; try++)
884 if (remote_debug > 0)
886 /* Don't use _filtered; we can't deal with a QUIT out of
887 target_wait, and I think this might be called from there. */
888 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
889 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
892 if (SERIAL_WRITE (mips_desc, packet,
893 HDR_LENGTH + len + TRLR_LENGTH) != 0)
894 mips_error ("write to target failed: %s", safe_strerror (errno));
903 unsigned char hdr[HDR_LENGTH + 1];
904 unsigned char trlr[TRLR_LENGTH + 1];
908 /* Get the packet header. If we time out, resend the data
910 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
916 /* If we get a data packet, assume it is a duplicate and
917 ignore it. FIXME: If the acknowledgement is lost, this
918 data packet may be the packet the remote sends after the
920 if (HDR_IS_DATA (hdr))
924 /* Ignore any errors raised whilst attempting to ignore
927 len = HDR_GET_LEN (hdr);
929 for (i = 0; i < len; i++)
933 rch = mips_readchar (remote_timeout);
939 if (rch == SERIAL_TIMEOUT)
941 /* ignore the character */
945 (void) mips_receive_trailer (trlr, &garbage, &ch,
948 /* We don't bother checking the checksum, or providing an
949 ACK to the packet. */
953 /* If the length is not 0, this is a garbled packet. */
954 if (HDR_GET_LEN (hdr) != 0)
957 /* Get the packet trailer. */
958 err = mips_receive_trailer (trlr, &garbage, &ch,
959 mips_retransmit_wait);
961 /* If we timed out, resend the data packet. */
965 /* If we got a bad character, reread the header. */
969 /* If the checksum does not match the trailer checksum, this
970 is a bad packet; ignore it. */
971 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
972 != TRLR_GET_CKSUM (trlr))
975 if (remote_debug > 0)
977 hdr[HDR_LENGTH] = '\0';
978 trlr[TRLR_LENGTH] = '\0';
979 /* Don't use _filtered; we can't deal with a QUIT out of
980 target_wait, and I think this might be called from there. */
981 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
982 HDR_GET_SEQ (hdr), hdr + 1, trlr);
985 /* If this ack is for the current packet, we're done. */
986 seq = HDR_GET_SEQ (hdr);
987 if (seq == mips_send_seq)
990 /* If this ack is for the last packet, resend the current
992 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
995 /* Otherwise this is a bad ack; ignore it. Increment the
996 garbage count to ensure that we do not stay in this loop
1002 mips_error ("Remote did not acknowledge packet");
1005 /* Receive and acknowledge a packet, returning the data in BUFF (which
1006 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1007 implies that only the sender retransmits packets, so this code just
1008 waits silently for a packet. It returns the length of the received
1009 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1010 don't print an error message and return -1. */
1013 mips_receive_packet (char *buff, int throw_error, int timeout)
1018 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1025 unsigned char hdr[HDR_LENGTH];
1026 unsigned char trlr[TRLR_LENGTH];
1030 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1033 mips_error ("Timed out waiting for remote packet");
1040 /* An acknowledgement is probably a duplicate; ignore it. */
1041 if (!HDR_IS_DATA (hdr))
1043 len = HDR_GET_LEN (hdr);
1044 /* Check if the length is valid for an ACK, we may aswell
1045 try and read the remainder of the packet: */
1048 /* Ignore the error condition, since we are going to
1049 ignore the packet anyway. */
1050 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1052 /* Don't use _filtered; we can't deal with a QUIT out of
1053 target_wait, and I think this might be called from there. */
1054 if (remote_debug > 0)
1055 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1059 len = HDR_GET_LEN (hdr);
1060 for (i = 0; i < len; i++)
1064 rch = mips_readchar (timeout);
1070 if (rch == SERIAL_TIMEOUT)
1073 mips_error ("Timed out waiting for remote packet");
1082 /* Don't use _filtered; we can't deal with a QUIT out of
1083 target_wait, and I think this might be called from there. */
1084 if (remote_debug > 0)
1085 fprintf_unfiltered (gdb_stdlog,
1086 "Got new SYN after %d chars (wanted %d)\n",
1091 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1095 mips_error ("Timed out waiting for packet");
1101 /* Don't use _filtered; we can't deal with a QUIT out of
1102 target_wait, and I think this might be called from there. */
1103 if (remote_debug > 0)
1104 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1108 /* If this is the wrong sequence number, ignore it. */
1109 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1111 /* Don't use _filtered; we can't deal with a QUIT out of
1112 target_wait, and I think this might be called from there. */
1113 if (remote_debug > 0)
1114 fprintf_unfiltered (gdb_stdlog,
1115 "Ignoring sequence number %d (want %d)\n",
1116 HDR_GET_SEQ (hdr), mips_receive_seq);
1120 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1123 if (remote_debug > 0)
1124 /* Don't use _filtered; we can't deal with a QUIT out of
1125 target_wait, and I think this might be called from there. */
1126 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1127 mips_cksum (hdr, buff, len),
1128 TRLR_GET_CKSUM (trlr));
1130 /* The checksum failed. Send an acknowledgement for the
1131 previous packet to tell the remote to resend the packet. */
1132 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1133 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1134 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1135 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1137 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1139 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1140 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1141 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1143 if (remote_debug > 0)
1145 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1146 /* Don't use _filtered; we can't deal with a QUIT out of
1147 target_wait, and I think this might be called from there. */
1148 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1152 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1155 mips_error ("write to target failed: %s", safe_strerror (errno));
1161 if (remote_debug > 0)
1164 /* Don't use _filtered; we can't deal with a QUIT out of
1165 target_wait, and I think this might be called from there. */
1166 printf_unfiltered ("Got packet \"%s\"\n", buff);
1169 /* We got the packet. Send an acknowledgement. */
1170 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1172 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1173 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1174 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1175 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1177 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1179 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1180 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1181 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1183 if (remote_debug > 0)
1185 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1186 /* Don't use _filtered; we can't deal with a QUIT out of
1187 target_wait, and I think this might be called from there. */
1188 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1192 if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1195 mips_error ("write to target failed: %s", safe_strerror (errno));
1203 /* Optionally send a request to the remote system and optionally wait
1204 for the reply. This implements the remote debugging protocol,
1205 which is built on top of the packet protocol defined above. Each
1206 request has an ADDR argument and a DATA argument. The following
1207 requests are defined:
1209 \0 don't send a request; just wait for a reply
1210 i read word from instruction space at ADDR
1211 d read word from data space at ADDR
1212 I write DATA to instruction space at ADDR
1213 D write DATA to data space at ADDR
1214 r read register number ADDR
1215 R set register number ADDR to value DATA
1216 c continue execution (if ADDR != 1, set pc to ADDR)
1217 s single step (if ADDR != 1, set pc to ADDR)
1219 The read requests return the value requested. The write requests
1220 return the previous value in the changed location. The execution
1221 requests return a UNIX wait value (the approximate signal which
1222 caused execution to stop is in the upper eight bits).
1224 If PERR is not NULL, this function waits for a reply. If an error
1225 occurs, it sets *PERR to 1 and sets errno according to what the
1226 target board reports. */
1229 mips_request (int cmd,
1236 char myBuff[DATA_MAXLEN + 1];
1241 unsigned long rresponse;
1243 if (buff == (char *) NULL)
1248 if (mips_need_reply)
1249 internal_error ("mips_request: Trying to send command before reply");
1250 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data));
1251 mips_send_packet (buff, 1);
1252 mips_need_reply = 1;
1255 if (perr == (int *) NULL)
1258 if (!mips_need_reply)
1259 internal_error ("mips_request: Trying to get reply before command");
1261 mips_need_reply = 0;
1263 len = mips_receive_packet (buff, 1, timeout);
1266 if (sscanf (buff, "0x%x %c 0x%x 0x%lx",
1267 &rpid, &rcmd, &rerrflg, &rresponse) != 4
1268 || (cmd != '\0' && rcmd != cmd))
1269 mips_error ("Bad response from remote board");
1275 /* FIXME: This will returns MIPS errno numbers, which may or may
1276 not be the same as errno values used on other systems. If
1277 they stick to common errno values, they will be the same, but
1278 if they don't, they must be translated. */
1289 mips_initialize_cleanups (PTR arg)
1291 mips_initializing = 0;
1295 mips_exit_cleanups (PTR arg)
1301 mips_send_command (const char *cmd, int prompt)
1303 SERIAL_WRITE (mips_desc, cmd, strlen (cmd));
1307 mips_expect (mips_monitor_prompt);
1310 /* Enter remote (dbx) debug mode: */
1312 mips_enter_debug (void)
1314 /* Reset the sequence numbers, ready for the new debug sequence: */
1316 mips_receive_seq = 0;
1318 if (mips_monitor != MON_IDT)
1319 mips_send_command ("debug\r", 0);
1320 else /* assume IDT monitor by default */
1321 mips_send_command ("db tty0\r", 0);
1324 SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1);
1326 /* We don't need to absorb any spurious characters here, since the
1327 mips_receive_header will eat up a reasonable number of characters
1328 whilst looking for the SYN, however this avoids the "garbage"
1329 being displayed to the user. */
1330 if (mips_monitor != MON_IDT)
1334 char buff[DATA_MAXLEN + 1];
1335 if (mips_receive_packet (buff, 1, 3) < 0)
1336 mips_error ("Failed to initialize (didn't receive packet).");
1340 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1342 mips_exit_debug (void)
1345 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1349 if (mips_monitor != MON_IDT)
1351 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1352 so we do not get a reply to this command: */
1353 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1354 mips_need_reply = 0;
1355 if (!mips_expect (" break!"))
1359 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1361 if (!mips_expect (mips_monitor_prompt))
1364 do_cleanups (old_cleanups);
1369 /* Initialize a new connection to the MIPS board, and make sure we are
1370 really connected. */
1373 mips_initialize (void)
1376 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1379 /* What is this code doing here? I don't see any way it can happen, and
1380 it might mean mips_initializing didn't get cleared properly.
1381 So I'll make it a warning. */
1383 if (mips_initializing)
1385 warning ("internal error: mips_initialize called twice");
1390 mips_initializing = 1;
1392 /* At this point, the packit protocol isn't responding. We'll try getting
1393 into the monitor, and restarting the protocol. */
1395 /* Force the system into the monitor. After this we *should* be at
1396 the mips_monitor_prompt. */
1397 if (mips_monitor != MON_IDT)
1398 j = 0; /* start by checking if we are already at the prompt */
1400 j = 1; /* start by sending a break */
1405 case 0: /* First, try sending a CR */
1406 SERIAL_FLUSH_INPUT (mips_desc);
1407 SERIAL_WRITE (mips_desc, "\r", 1);
1409 case 1: /* First, try sending a break */
1410 SERIAL_SEND_BREAK (mips_desc);
1412 case 2: /* Then, try a ^C */
1413 SERIAL_WRITE (mips_desc, "\003", 1);
1415 case 3: /* Then, try escaping from download */
1417 if (mips_monitor != MON_IDT)
1421 /* We shouldn't need to send multiple termination
1422 sequences, since the target performs line (or
1423 block) reads, and then processes those
1424 packets. In-case we were downloading a large packet
1425 we flush the output buffer before inserting a
1426 termination sequence. */
1427 SERIAL_FLUSH_OUTPUT (mips_desc);
1428 sprintf (tbuff, "\r/E/E\r");
1429 SERIAL_WRITE (mips_desc, tbuff, 6);
1436 /* We are possibly in binary download mode, having
1437 aborted in the middle of an S-record. ^C won't
1438 work because of binary mode. The only reliable way
1439 out is to send enough termination packets (8 bytes)
1440 to fill up and then overflow the largest size
1441 S-record (255 bytes in this case). This amounts to
1445 mips_make_srec (srec, '7', 0, NULL, 0);
1447 for (i = 1; i <= 33; i++)
1449 SERIAL_WRITE (mips_desc, srec, 8);
1451 if (SERIAL_READCHAR (mips_desc, 0) >= 0)
1452 break; /* Break immediatly if we get something from
1459 mips_error ("Failed to initialize.");
1462 if (mips_expect (mips_monitor_prompt))
1466 if (mips_monitor != MON_IDT)
1468 /* Sometimes PMON ignores the first few characters in the first
1469 command sent after a load. Sending a blank command gets
1471 mips_send_command ("\r", -1);
1473 /* Ensure the correct target state: */
1474 if (mips_monitor != MON_LSI)
1475 mips_send_command ("set regsize 64\r", -1);
1476 mips_send_command ("set hostport tty0\r", -1);
1477 mips_send_command ("set brkcmd \"\"\r", -1);
1478 /* Delete all the current breakpoints: */
1479 mips_send_command ("db *\r", -1);
1480 /* NOTE: PMON does not have breakpoint support through the
1481 "debug" mode, only at the monitor command-line. */
1484 mips_enter_debug ();
1486 /* Clear all breakpoints: */
1487 if ((mips_monitor == MON_IDT
1488 && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1489 || mips_monitor == MON_LSI)
1490 monitor_supports_breakpoints = 1;
1492 monitor_supports_breakpoints = 0;
1494 do_cleanups (old_cleanups);
1496 /* If this doesn't call error, we have connected; we don't care if
1497 the request itself succeeds or fails. */
1499 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1500 set_current_frame (create_new_frame (read_fp (), read_pc ()));
1501 select_frame (get_current_frame (), 0);
1504 /* Open a connection to the remote board. */
1506 common_open (struct target_ops *ops, char *name, int from_tty,
1507 enum mips_monitor_type new_monitor,
1508 const char *new_monitor_prompt)
1511 char *serial_port_name;
1512 char *remote_name = 0;
1513 char *local_name = 0;
1518 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1519 device is attached to the target board (e.g., /dev/ttya).\n"
1520 "If you want to use TFTP to download to the board, specify the name of a\n"
1521 "temporary file to be used by GDB for downloads as the second argument.\n"
1522 "This filename must be in the form host:filename, where host is the name\n"
1523 "of the host running the TFTP server, and the file must be readable by the\n"
1524 "world. If the local name of the temporary file differs from the name as\n"
1525 "seen from the board via TFTP, specify that name as the third parameter.\n");
1527 /* Parse the serial port name, the optional TFTP name, and the
1528 optional local TFTP name. */
1529 if ((argv = buildargv (name)) == NULL)
1531 make_cleanup_freeargv (argv);
1533 serial_port_name = xstrdup (argv[0]);
1534 if (argv[1]) /* remote TFTP name specified? */
1536 remote_name = argv[1];
1537 if (argv[2]) /* local TFTP filename specified? */
1538 local_name = argv[2];
1541 target_preopen (from_tty);
1544 unpush_target (current_ops);
1546 /* Open and initialize the serial port. */
1547 mips_desc = SERIAL_OPEN (serial_port_name);
1548 if (mips_desc == (serial_t) NULL)
1549 perror_with_name (serial_port_name);
1551 if (baud_rate != -1)
1553 if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
1555 SERIAL_CLOSE (mips_desc);
1556 perror_with_name (serial_port_name);
1560 SERIAL_RAW (mips_desc);
1562 /* Open and initialize the optional download port. If it is in the form
1563 hostname#portnumber, it's a UDP socket. If it is in the form
1564 hostname:filename, assume it's the TFTP filename that must be
1565 passed to the DDB board to tell it where to get the load file. */
1568 if (strchr (remote_name, '#'))
1570 udp_desc = SERIAL_OPEN (remote_name);
1572 perror_with_name ("Unable to open UDP port");
1577 /* Save the remote and local names of the TFTP temp file. If
1578 the user didn't specify a local name, assume it's the same
1579 as the part of the remote name after the "host:". */
1583 xfree (tftp_localname);
1584 if (local_name == NULL)
1585 if ((local_name = strchr (remote_name, ':')) != NULL)
1586 local_name++; /* skip over the colon */
1587 if (local_name == NULL)
1588 local_name = remote_name; /* local name same as remote name */
1589 tftp_name = xstrdup (remote_name);
1590 tftp_localname = xstrdup (local_name);
1598 /* Reset the expected monitor prompt if it's never been set before. */
1599 if (mips_monitor_prompt == NULL)
1600 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1601 mips_monitor = new_monitor;
1606 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1608 /* Switch to using remote target now. */
1611 /* FIXME: Should we call start_remote here? */
1613 /* Try to figure out the processor model if possible. */
1614 ptype = mips_read_processor_type ();
1616 mips_set_processor_type_command (xstrdup (ptype), 0);
1618 /* This is really the job of start_remote however, that makes an assumption
1619 that the target is about to print out a status message of some sort. That
1620 doesn't happen here (in fact, it may not be possible to get the monitor to
1621 send the appropriate packet). */
1623 flush_cached_frames ();
1624 registers_changed ();
1625 stop_pc = read_pc ();
1626 set_current_frame (create_new_frame (read_fp (), stop_pc));
1627 select_frame (get_current_frame (), 0);
1628 print_stack_frame (selected_frame, -1, 1);
1629 xfree (serial_port_name);
1633 mips_open (char *name, int from_tty)
1635 const char *monitor_prompt = NULL;
1636 if (TARGET_ARCHITECTURE != NULL
1637 && TARGET_ARCHITECTURE->arch == bfd_arch_mips)
1639 switch (TARGET_ARCHITECTURE->mach)
1641 case bfd_mach_mips4100:
1642 case bfd_mach_mips4300:
1643 case bfd_mach_mips4600:
1644 case bfd_mach_mips4650:
1645 case bfd_mach_mips5000:
1646 monitor_prompt = "<RISQ> ";
1650 if (monitor_prompt == NULL)
1651 monitor_prompt = "<IDT>";
1652 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1656 pmon_open (char *name, int from_tty)
1658 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1662 ddb_open (char *name, int from_tty)
1664 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1668 lsi_open (char *name, int from_tty)
1672 /* Clear the LSI breakpoint table. */
1673 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1674 lsi_breakpoints[i].type = BREAK_UNUSED;
1676 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1679 /* Close a connection to the remote board. */
1682 mips_close (int quitting)
1686 /* Get the board out of remote debugging mode. */
1687 (void) mips_exit_debug ();
1693 /* Detach from the remote board. */
1696 mips_detach (char *args, int from_tty)
1699 error ("Argument given to \"detach\" when remotely debugging.");
1706 printf_unfiltered ("Ending remote MIPS debugging.\n");
1709 /* Tell the target board to resume. This does not wait for a reply
1710 from the board, except in the case of single-stepping on LSI boards,
1711 where PMON does return a reply. */
1714 mips_resume (int pid, int step, enum target_signal siggnal)
1718 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1719 a single step, so we wait for that. */
1720 mips_request (step ? 's' : 'c', 1, siggnal,
1721 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1722 mips_receive_wait, NULL);
1725 /* Return the signal corresponding to SIG, where SIG is the number which
1726 the MIPS protocol uses for the signal. */
1728 mips_signal_from_protocol (int sig)
1730 /* We allow a few more signals than the IDT board actually returns, on
1731 the theory that there is at least *some* hope that perhaps the numbering
1732 for these signals is widely agreed upon. */
1735 return TARGET_SIGNAL_UNKNOWN;
1737 /* Don't want to use target_signal_from_host because we are converting
1738 from MIPS signal numbers, not host ones. Our internal numbers
1739 match the MIPS numbers for the signals the board can return, which
1740 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1741 return (enum target_signal) sig;
1744 /* Wait until the remote stops, and return a wait status. */
1747 mips_wait (int pid, struct target_waitstatus *status)
1751 char buff[DATA_MAXLEN];
1757 interrupt_count = 0;
1760 /* If we have not sent a single step or continue command, then the
1761 board is waiting for us to do something. Return a status
1762 indicating that it is stopped. */
1763 if (!mips_need_reply)
1765 status->kind = TARGET_WAITKIND_STOPPED;
1766 status->value.sig = TARGET_SIGNAL_TRAP;
1770 /* No timeout; we sit here as long as the program continues to execute. */
1772 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1775 mips_error ("Remote failure: %s", safe_strerror (errno));
1777 /* On returning from a continue, the PMON monitor seems to start
1778 echoing back the messages we send prior to sending back the
1779 ACK. The code can cope with this, but to try and avoid the
1780 unnecessary serial traffic, and "spurious" characters displayed
1781 to the user, we cheat and reset the debug protocol. The problems
1782 seems to be caused by a check on the number of arguments, and the
1783 command length, within the monitor causing it to echo the command
1785 if (mips_monitor == MON_PMON)
1788 mips_enter_debug ();
1791 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1793 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s",
1794 &rpc, &rfp, &rsp, flags);
1797 char buf[MAX_REGISTER_RAW_SIZE];
1799 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc);
1800 supply_register (PC_REGNUM, buf);
1802 store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp);
1803 supply_register (30, buf); /* This register they are avoiding and so it is unnamed */
1805 store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp);
1806 supply_register (SP_REGNUM, buf);
1808 store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0);
1809 supply_register (FP_REGNUM, buf);
1815 for (i = 0; i <= 2; i++)
1816 if (flags[i] == 'r' || flags[i] == 'w')
1818 else if (flags[i] == '\000')
1823 if (strcmp (target_shortname, "lsi") == 0)
1826 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1827 Right now, PMON doesn't give us enough information to determine which
1828 breakpoint we hit. So we have to look up the PC in our own table
1829 of breakpoints, and if found, assume it's just a normal instruction
1830 fetch breakpoint, not a data watchpoint. FIXME when PMON
1831 provides some way to tell us what type of breakpoint it is. */
1833 CORE_ADDR pc = read_pc ();
1836 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1838 if (lsi_breakpoints[i].addr == pc
1839 && lsi_breakpoints[i].type == BREAK_FETCH)
1846 /* If a data breakpoint was hit, PMON returns the following packet:
1848 The return packet from an ordinary breakpoint doesn't have the
1849 extra 0x01 field tacked onto the end. */
1850 if (nfields == 1 && rpc == 1)
1855 /* NOTE: The following (sig) numbers are defined by PMON:
1856 SPP_SIGTRAP 5 breakpoint
1864 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1865 and so on, because the constants we want here are determined by the
1866 MIPS protocol and have nothing to do with what host we are running on. */
1867 if ((rstatus & 0xff) == 0)
1869 status->kind = TARGET_WAITKIND_EXITED;
1870 status->value.integer = (((rstatus) >> 8) & 0xff);
1872 else if ((rstatus & 0xff) == 0x7f)
1874 status->kind = TARGET_WAITKIND_STOPPED;
1875 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1877 /* If the stop PC is in the _exit function, assume
1878 we hit the 'break 0x3ff' instruction in _exit, so this
1879 is not a normal breakpoint. */
1880 if (strcmp (target_shortname, "lsi") == 0)
1883 CORE_ADDR func_start;
1884 CORE_ADDR pc = read_pc ();
1886 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1887 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1888 && func_start == pc)
1889 status->kind = TARGET_WAITKIND_EXITED;
1894 status->kind = TARGET_WAITKIND_SIGNALLED;
1895 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1901 /* We have to map between the register numbers used by gdb and the
1902 register numbers used by the debugging protocol. This function
1903 assumes that we are using tm-mips.h. */
1905 #define REGNO_OFFSET 96
1908 mips_map_regno (int regno)
1912 if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32)
1913 return regno - FP0_REGNUM + 32;
1917 return REGNO_OFFSET + 0;
1919 return REGNO_OFFSET + 1;
1921 return REGNO_OFFSET + 2;
1923 return REGNO_OFFSET + 3;
1925 return REGNO_OFFSET + 4;
1927 return REGNO_OFFSET + 5;
1929 /* FIXME: Is there a way to get the status register? */
1934 /* Fetch the remote registers. */
1937 mips_fetch_registers (int regno)
1939 unsigned LONGEST val;
1944 for (regno = 0; regno < NUM_REGS; regno++)
1945 mips_fetch_registers (regno);
1949 if (regno == FP_REGNUM || regno == ZERO_REGNUM)
1950 /* FP_REGNUM on the mips is a hack which is just supposed to read
1951 zero (see also mips-nat.c). */
1955 /* If PMON doesn't support this register, don't waste serial
1956 bandwidth trying to read it. */
1957 int pmon_reg = mips_map_regno (regno);
1958 if (regno != 0 && pmon_reg == 0)
1962 /* Unfortunately the PMON version in the Vr4300 board has been
1963 compiled without the 64bit register access commands. This
1964 means we cannot get hold of the full register width. */
1965 if (mips_monitor == MON_DDB)
1966 val = (unsigned) mips_request ('t', pmon_reg, 0,
1967 &err, mips_receive_wait, NULL);
1969 val = mips_request ('r', pmon_reg, 0,
1970 &err, mips_receive_wait, NULL);
1972 mips_error ("Can't read register %d: %s", regno,
1973 safe_strerror (errno));
1978 char buf[MAX_REGISTER_RAW_SIZE];
1980 /* We got the number the register holds, but gdb expects to see a
1981 value in the target byte ordering. */
1982 store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val);
1983 supply_register (regno, buf);
1987 /* Prepare to store registers. The MIPS protocol can store individual
1988 registers, so this function doesn't have to do anything. */
1991 mips_prepare_to_store (void)
1995 /* Store remote register(s). */
1998 mips_store_registers (int regno)
2004 for (regno = 0; regno < NUM_REGS; regno++)
2005 mips_store_registers (regno);
2009 mips_request ('R', mips_map_regno (regno),
2010 read_register (regno),
2011 &err, mips_receive_wait, NULL);
2013 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2016 /* Fetch a word from the target board. */
2019 mips_fetch_word (CORE_ADDR addr)
2024 val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2027 /* Data space failed; try instruction space. */
2028 val = mips_request ('i', addr, 0, &err,
2029 mips_receive_wait, NULL);
2031 mips_error ("Can't read address 0x%s: %s",
2032 paddr_nz (addr), safe_strerror (errno));
2037 /* Store a word to the target board. Returns errno code or zero for
2038 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2039 memory location there. */
2041 /* FIXME! make sure only 32-bit quantities get stored! */
2043 mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents)
2046 unsigned int oldcontents;
2048 oldcontents = mips_request ('D', addr, val, &err,
2049 mips_receive_wait, NULL);
2052 /* Data space failed; try instruction space. */
2053 oldcontents = mips_request ('I', addr, val, &err,
2054 mips_receive_wait, NULL);
2058 if (old_contents != NULL)
2059 store_unsigned_integer (old_contents, 4, oldcontents);
2063 /* Read or write LEN bytes from inferior memory at MEMADDR,
2064 transferring to or from debugger address MYADDR. Write to inferior
2065 if SHOULD_WRITE is nonzero. Returns length of data written or
2066 read; 0 for error. Note that protocol gives us the correct value
2067 for a longword, since it transfers values in ASCII. We want the
2068 byte values, so we have to swap the longword values. */
2070 static int mask_address_p = 1;
2073 mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
2074 struct mem_attrib *attrib ATTRIBUTE_UNUSED,
2075 struct target_ops *target ATTRIBUTE_UNUSED)
2083 /* PMON targets do not cope well with 64 bit addresses. Mask the
2084 value down to 32 bits. */
2086 memaddr &= (CORE_ADDR) 0xffffffff;
2088 /* Round starting address down to longword boundary. */
2089 addr = memaddr & ~3;
2090 /* Round ending address up; get number of longwords that makes. */
2091 count = (((memaddr + len) - addr) + 3) / 4;
2092 /* Allocate buffer of that many longwords. */
2093 buffer = alloca (count * 4);
2097 /* Fill start and end extra bytes of buffer with existing data. */
2098 if (addr != memaddr || len < 4)
2100 /* Need part of initial word -- fetch it. */
2101 store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr));
2106 /* Need part of last word -- fetch it. FIXME: we do this even
2107 if we don't need it. */
2108 store_unsigned_integer (&buffer[(count - 1) * 4], 4,
2109 mips_fetch_word (addr + (count - 1) * 4));
2112 /* Copy data to be written over corresponding part of buffer */
2114 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2116 /* Write the entire buffer. */
2118 for (i = 0; i < count; i++, addr += 4)
2120 status = mips_store_word (addr,
2121 extract_unsigned_integer (&buffer[i * 4], 4),
2123 /* Report each kilobyte (we download 32-bit words at a time) */
2126 printf_unfiltered ("*");
2127 gdb_flush (gdb_stdout);
2134 /* FIXME: Do we want a QUIT here? */
2137 printf_unfiltered ("\n");
2141 /* Read all the longwords */
2142 for (i = 0; i < count; i++, addr += 4)
2144 store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr));
2148 /* Copy appropriate bytes out of the buffer. */
2149 memcpy (myaddr, buffer + (memaddr & 3), len);
2154 /* Print info on this target. */
2157 mips_files_info (struct target_ops *ignore)
2159 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2162 /* Kill the process running on the board. This will actually only
2163 work if we are doing remote debugging over the console input. I
2164 think that if IDT/sim had the remote debug interrupt enabled on the
2165 right port, we could interrupt the process with a break signal. */
2170 if (!mips_wait_flag)
2175 if (interrupt_count >= 2)
2177 interrupt_count = 0;
2179 target_terminal_ours ();
2181 if (query ("Interrupted while waiting for the program.\n\
2182 Give up (and stop debugging it)? "))
2184 /* Clean up in such a way that mips_close won't try to talk to the
2185 board (it almost surely won't work since we weren't able to talk to
2190 printf_unfiltered ("Ending remote MIPS debugging.\n");
2191 target_mourn_inferior ();
2193 return_to_top_level (RETURN_QUIT);
2196 target_terminal_inferior ();
2199 if (remote_debug > 0)
2200 printf_unfiltered ("Sending break\n");
2202 SERIAL_SEND_BREAK (mips_desc);
2211 SERIAL_WRITE (mips_desc, &cc, 1);
2213 target_mourn_inferior ();
2218 /* Start running on the target board. */
2221 mips_create_inferior (char *execfile, char *args, char **env)
2228 Can't pass arguments to remote MIPS board; arguments ignored.");
2229 /* And don't try to use them on the next "run" command. */
2230 execute_command ("set args", 0);
2233 if (execfile == 0 || exec_bfd == 0)
2234 error ("No executable file specified");
2236 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2238 init_wait_for_inferior ();
2240 /* FIXME: Should we set inferior_pid here? */
2242 proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
2245 /* Clean up after a process. Actually nothing to do. */
2248 mips_mourn_inferior (void)
2250 if (current_ops != NULL)
2251 unpush_target (current_ops);
2252 generic_mourn_inferior ();
2255 /* We can write a breakpoint and read the shadow contents in one
2258 /* Insert a breakpoint. On targets that don't have built-in breakpoint
2259 support, we read the contents of the target location and stash it,
2260 then overwrite it with a breakpoint instruction. ADDR is the target
2261 location in the target machine. CONTENTS_CACHE is a pointer to
2262 memory allocated for saving the target contents. It is guaranteed
2263 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
2264 is accomplished via BREAKPOINT_MAX). */
2267 mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2269 if (monitor_supports_breakpoints)
2270 return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2272 return memory_insert_breakpoint (addr, contents_cache);
2276 mips_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2278 if (monitor_supports_breakpoints)
2279 return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH);
2281 return memory_remove_breakpoint (addr, contents_cache);
2284 #if 0 /* currently not used */
2285 /* PMON does not currently provide support for the debug mode 'b'
2286 commands to manipulate breakpoints. However, if we wanted to use
2287 the monitor breakpoints (rather than the GDB BREAK_INSN version)
2288 then this code performs the work needed to leave debug mode,
2289 set/clear the breakpoint, and then return to debug mode. */
2291 #define PMON_MAX_BP (33) /* 32 SW, 1 HW */
2292 static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP];
2293 /* NOTE: The code relies on this vector being zero-initialised by the system */
2296 pmon_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
2300 if (monitor_supports_breakpoints)
2302 char tbuff[12]; /* space for breakpoint command */
2306 /* PMON does not support debug level breakpoint set/remove: */
2307 if (mips_exit_debug ())
2308 mips_error ("Failed to exit debug mode");
2310 sprintf (tbuff, "b %08x\r", addr);
2311 mips_send_command (tbuff, 0);
2313 mips_expect ("Bpt ");
2315 if (!mips_getstring (tbuff, remote_timeout))
2317 tbuff[2] = '\0'; /* terminate the string */
2318 if (sscanf (tbuff, "%d", &bpnum) != 1)
2320 fprintf_unfiltered (gdb_stderr,
2321 "Invalid decimal breakpoint number from target: %s\n", tbuff);
2325 mips_expect (" = ");
2327 /* Lead in the hex number we are expecting: */
2331 /* FIXME!! only 8 bytes! need to expand for Bfd64;
2332 which targets return 64-bit addresses? PMON returns only 32! */
2333 if (!mips_getstring (&tbuff[2], 8))
2335 tbuff[10] = '\0'; /* terminate the string */
2337 if (sscanf (tbuff, "0x%08x", &bpaddr) != 1)
2339 fprintf_unfiltered (gdb_stderr,
2340 "Invalid hex address from target: %s\n", tbuff);
2344 if (bpnum >= PMON_MAX_BP)
2346 fprintf_unfiltered (gdb_stderr,
2347 "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n",
2348 bpnum, PMON_MAX_BP - 1);
2353 fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr);
2355 mips_pmon_bp_info[bpnum] = bpaddr;
2357 mips_expect ("\r\n");
2358 mips_expect (mips_monitor_prompt);
2360 mips_enter_debug ();
2365 return mips_store_word (addr, BREAK_INSN, contents_cache);
2369 pmon_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
2371 if (monitor_supports_breakpoints)
2374 char tbuff[7]; /* enough for delete breakpoint command */
2376 for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++)
2377 if (mips_pmon_bp_info[bpnum] == addr)
2380 if (bpnum >= PMON_MAX_BP)
2382 fprintf_unfiltered (gdb_stderr,
2383 "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n",
2388 if (mips_exit_debug ())
2389 mips_error ("Failed to exit debug mode");
2391 sprintf (tbuff, "db %02d\r", bpnum);
2393 mips_send_command (tbuff, -1);
2394 /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not
2395 set" message will be returned. */
2397 mips_enter_debug ();
2402 return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
2407 /* Tell whether this target can support a hardware breakpoint. CNT
2408 is the number of hardware breakpoints already installed. This
2409 implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */
2412 remote_mips_can_use_hardware_watchpoint (int cnt)
2414 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2418 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2419 This is used for memory ref breakpoints. */
2421 static unsigned long
2422 calculate_mask (CORE_ADDR addr, int len)
2427 mask = addr ^ (addr + len - 1);
2429 for (i = 32; i >= 0; i--)
2435 mask = (unsigned long) 0xffffffff >> i;
2441 /* Insert a hardware breakpoint. This works only on LSI targets, which
2442 implement ordinary breakpoints using hardware facilities. */
2445 remote_mips_insert_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2447 if (strcmp (target_shortname, "lsi") == 0)
2448 return mips_insert_breakpoint (addr, contents_cache);
2454 /* Remove a hardware breakpoint. This works only on LSI targets, which
2455 implement ordinary breakpoints using hardware facilities. */
2458 remote_mips_remove_hw_breakpoint (CORE_ADDR addr, char *contents_cache)
2460 if (strcmp (target_shortname, "lsi") == 0)
2461 return mips_remove_breakpoint (addr, contents_cache);
2466 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2467 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2471 remote_mips_set_watchpoint (CORE_ADDR addr, int len, int type)
2473 if (set_breakpoint (addr, len, type))
2480 remote_mips_remove_watchpoint (CORE_ADDR addr, int len, int type)
2482 if (clear_breakpoint (addr, len, type))
2489 remote_mips_stopped_by_watchpoint (void)
2491 return hit_watchpoint;
2495 /* Insert a breakpoint. */
2498 set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2500 return common_breakpoint (1, addr, len, type);
2504 /* Clear a breakpoint. */
2507 clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2509 return common_breakpoint (0, addr, len, type);
2513 /* Check the error code from the return packet for an LSI breakpoint
2514 command. If there's no error, just return 0. If it's a warning,
2515 print the warning text and return 0. If it's an error, print
2516 the error text and return 1. <ADDR> is the address of the breakpoint
2517 that was being set. <RERRFLG> is the error code returned by PMON.
2518 This is a helper function for common_breakpoint. */
2521 check_lsi_error (CORE_ADDR addr, int rerrflg)
2523 struct lsi_error *err;
2524 char *saddr = paddr_nz (addr); /* printable address string */
2526 if (rerrflg == 0) /* no error */
2529 /* Warnings can be ORed together, so check them all. */
2530 if (rerrflg & W_WARN)
2532 if (monitor_warnings)
2535 for (err = lsi_warning_table; err->code != 0; err++)
2537 if ((err->code & rerrflg) == err->code)
2540 fprintf_unfiltered (gdb_stderr,
2541 "common_breakpoint (0x%s): Warning: %s\n",
2547 fprintf_unfiltered (gdb_stderr,
2548 "common_breakpoint (0x%s): Unknown warning: 0x%x\n",
2555 /* Errors are unique, i.e. can't be ORed together. */
2556 for (err = lsi_error_table; err->code != 0; err++)
2558 if ((err->code & rerrflg) == err->code)
2560 fprintf_unfiltered (gdb_stderr,
2561 "common_breakpoint (0x%s): Error: %s\n",
2567 fprintf_unfiltered (gdb_stderr,
2568 "common_breakpoint (0x%s): Unknown error: 0x%x\n",
2575 /* This routine sends a breakpoint command to the remote target.
2577 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2578 <ADDR> is the address of the breakpoint.
2579 <LEN> the length of the region to break on.
2580 <TYPE> is the type of breakpoint:
2581 0 = write (BREAK_WRITE)
2582 1 = read (BREAK_READ)
2583 2 = read/write (BREAK_ACCESS)
2584 3 = instruction fetch (BREAK_FETCH)
2586 Return 0 if successful; otherwise 1. */
2589 common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2591 char buf[DATA_MAXLEN + 1];
2593 int rpid, rerrflg, rresponse, rlen;
2596 addr = ADDR_BITS_REMOVE (addr);
2598 if (mips_monitor == MON_LSI)
2600 if (set == 0) /* clear breakpoint */
2602 /* The LSI PMON "clear breakpoint" has this form:
2603 <pid> 'b' <bptn> 0x0
2605 <pid> 'b' 0x0 <code>
2607 <bptn> is a breakpoint number returned by an earlier 'B' command.
2608 Possible return codes: OK, E_BPT. */
2612 /* Search for the breakpoint in the table. */
2613 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2614 if (lsi_breakpoints[i].type == type
2615 && lsi_breakpoints[i].addr == addr
2616 && lsi_breakpoints[i].len == len)
2619 /* Clear the table entry and tell PMON to clear the breakpoint. */
2620 if (i == MAX_LSI_BREAKPOINTS)
2622 warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2627 lsi_breakpoints[i].type = BREAK_UNUSED;
2628 sprintf (buf, "0x0 b 0x%x 0x0", i);
2629 mips_send_packet (buf, 1);
2631 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2634 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2636 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2638 return (check_lsi_error (addr, rerrflg));
2641 /* set a breakpoint */
2643 /* The LSI PMON "set breakpoint" command has this form:
2644 <pid> 'B' <addr> 0x0
2646 <pid> 'B' <bptn> <code>
2648 The "set data breakpoint" command has this form:
2650 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2652 where: type= "0x1" = read
2654 "0x3" = access (read or write)
2656 The reply returns two values:
2657 bptn - a breakpoint number, which is a small integer with
2658 possible values of zero through 255.
2659 code - an error return code, a value of zero indicates a
2660 succesful completion, other values indicate various
2661 errors and warnings.
2663 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2667 if (type == BREAK_FETCH) /* instruction breakpoint */
2670 sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr));
2676 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr),
2677 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2678 paddr_nz (addr + len - 1));
2680 mips_send_packet (buf, 1);
2682 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2685 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2686 &rpid, &rcmd, &rresponse, &rerrflg);
2687 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2688 mips_error ("common_breakpoint: Bad response from remote board: %s", buf);
2691 if (check_lsi_error (addr, rerrflg))
2694 /* rresponse contains PMON's breakpoint number. Record the
2695 information for this breakpoint so we can clear it later. */
2696 lsi_breakpoints[rresponse].type = type;
2697 lsi_breakpoints[rresponse].addr = addr;
2698 lsi_breakpoints[rresponse].len = len;
2705 /* On non-LSI targets, the breakpoint command has this form:
2706 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2707 <MASK> is a don't care mask for addresses.
2708 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2712 mask = calculate_mask (addr, len);
2715 if (set) /* set a breakpoint */
2720 case BREAK_WRITE: /* write */
2723 case BREAK_READ: /* read */
2726 case BREAK_ACCESS: /* read/write */
2729 case BREAK_FETCH: /* fetch */
2737 sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr),
2738 paddr_nz (mask), flags);
2743 sprintf (buf, "0x0 b 0x%s", paddr_nz (addr));
2746 mips_send_packet (buf, 1);
2748 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2751 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2752 &rpid, &rcmd, &rerrflg, &rresponse);
2754 if (nfields != 4 || rcmd != cmd)
2755 mips_error ("common_breakpoint: Bad response from remote board: %s",
2760 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2761 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2762 if (mips_monitor == MON_DDB)
2763 rresponse = rerrflg;
2764 if (rresponse != 22) /* invalid argument */
2765 fprintf_unfiltered (gdb_stderr,
2766 "common_breakpoint (0x%s): Got error: 0x%x\n",
2767 paddr_nz (addr), rresponse);
2775 send_srec (char *srec, int len, CORE_ADDR addr)
2781 SERIAL_WRITE (mips_desc, srec, len);
2783 ch = mips_readchar (remote_timeout);
2787 case SERIAL_TIMEOUT:
2788 error ("Timeout during download.");
2792 case 0x15: /* NACK */
2793 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr));
2796 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2801 /* Download a binary file by converting it to S records. */
2804 mips_load_srec (char *args)
2808 char *buffer, srec[1024];
2810 unsigned int srec_frame = 200;
2812 static int hashmark = 1;
2814 buffer = alloca (srec_frame * 2 + 256);
2816 abfd = bfd_openr (args, 0);
2819 printf_filtered ("Unable to open file %s\n", args);
2823 if (bfd_check_format (abfd, bfd_object) == 0)
2825 printf_filtered ("File is not an object file\n");
2829 /* This actually causes a download in the IDT binary format: */
2830 mips_send_command (LOAD_CMD, 0);
2832 for (s = abfd->sections; s; s = s->next)
2834 if (s->flags & SEC_LOAD)
2836 unsigned int numbytes;
2838 /* FIXME! vma too small????? */
2839 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2841 (long) (s->vma + s->_raw_size));
2842 gdb_flush (gdb_stdout);
2844 for (i = 0; i < s->_raw_size; i += numbytes)
2846 numbytes = min (srec_frame, s->_raw_size - i);
2848 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2850 reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes);
2851 send_srec (srec, reclen, s->vma + i);
2855 putchar_unfiltered ('#');
2856 gdb_flush (gdb_stdout);
2859 } /* Per-packet (or S-record) loop */
2861 putchar_unfiltered ('\n');
2862 } /* Loadable sections */
2865 putchar_unfiltered ('\n');
2867 /* Write a type 7 terminator record. no data for a type 7, and there
2868 is no data, so len is 0. */
2870 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2872 send_srec (srec, reclen, abfd->start_address);
2874 SERIAL_FLUSH_INPUT (mips_desc);
2878 * mips_make_srec -- make an srecord. This writes each line, one at a
2879 * time, each with it's own header and trailer line.
2880 * An srecord looks like this:
2882 * byte count-+ address
2883 * start ---+ | | data +- checksum
2885 * S01000006F6B692D746573742E73726563E4
2886 * S315000448600000000000000000FC00005900000000E9
2887 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2888 * S30B0004485A0000000000004E
2891 * S<type><length><address><data><checksum>
2895 * is the number of bytes following upto the checksum. Note that
2896 * this is not the number of chars following, since it takes two
2897 * chars to represent a byte.
2901 * 1) two byte address data record
2902 * 2) three byte address data record
2903 * 3) four byte address data record
2904 * 7) four byte address termination record
2905 * 8) three byte address termination record
2906 * 9) two byte address termination record
2909 * is the start address of the data following, or in the case of
2910 * a termination record, the start address of the image
2914 * is the sum of all the raw byte data in the record, from the length
2915 * upwards, modulo 256 and subtracted from 255.
2917 * This routine returns the length of the S-record.
2922 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2925 unsigned char checksum;
2928 /* Create the header for the srec. addr_size is the number of bytes in the address,
2929 and 1 is the number of bytes in the count. */
2931 /* FIXME!! bigger buf required for 64-bit! */
2934 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2935 /* This assumes S3 style downloads (4byte addresses). There should
2936 probably be a check, or the code changed to make it more
2938 buf[3] = memaddr >> 24;
2939 buf[4] = memaddr >> 16;
2940 buf[5] = memaddr >> 8;
2942 memcpy (&buf[7], myaddr, len);
2944 /* Note that the checksum is calculated on the raw data, not the
2945 hexified data. It includes the length, address and the data
2946 portions of the packet. */
2948 buf += 2; /* Point at length byte */
2949 for (i = 0; i < len + 4 + 1; i++)
2957 /* The following manifest controls whether we enable the simple flow
2958 control support provided by the monitor. If enabled the code will
2959 wait for an affirmative ACK between transmitting packets. */
2960 #define DOETXACK (1)
2962 /* The PMON fast-download uses an encoded packet format constructed of
2963 3byte data packets (encoded as 4 printable ASCII characters), and
2964 escape sequences (preceded by a '/'):
2967 'C' compare checksum (12bit value, not included in checksum calculation)
2968 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2969 'Z' zero fill multiple of 3bytes
2970 'B' byte (12bit encoded value, of 8bit data)
2971 'A' address (36bit encoded value)
2972 'E' define entry as original address, and exit load
2974 The packets are processed in 4 character chunks, so the escape
2975 sequences that do not have any data (or variable length data)
2976 should be padded to a 4 character boundary. The decoder will give
2977 an error if the complete message block size is not a multiple of
2978 4bytes (size of record).
2980 The encoding of numbers is done in 6bit fields. The 6bit value is
2981 used to index into this string to get the specific character
2982 encoding for the value: */
2983 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2985 /* Convert the number of bits required into an encoded number, 6bits
2986 at a time (range 0..63). Keep a checksum if required (passed
2987 pointer non-NULL). The function returns the number of encoded
2988 characters written into the buffer. */
2990 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2992 int count = (n / 6);
2996 fprintf_unfiltered (gdb_stderr,
2997 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
3002 fprintf_unfiltered (gdb_stderr,
3003 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
3007 /* Deal with the checksum: */
3013 *chksum += ((v >> 24) & 0xFFF);
3015 *chksum += ((v >> 12) & 0xFFF);
3017 *chksum += ((v >> 0) & 0xFFF);
3024 *p++ = encoding[(v >> n) & 0x3F];
3031 /* Shorthand function (that could be in-lined) to output the zero-fill
3032 escape sequence into the data stream. */
3034 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
3038 sprintf (*buff, "/Z");
3039 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3040 *buff += (count + 2);
3042 return (recsize + count + 2);
3046 pmon_checkset (int recsize, char **buff, int *value)
3050 /* Add the checksum (without updating the value): */
3051 sprintf (*buff, "/C");
3052 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3053 *buff += (count + 2);
3054 sprintf (*buff, "\n");
3055 *buff += 2; /* include zero terminator */
3056 /* Forcing a checksum validation clears the sum: */
3058 return (recsize + count + 3);
3061 /* Amount of padding we leave after at the end of the output buffer,
3062 for the checksum and line termination characters: */
3063 #define CHECKSIZE (4 + 4 + 4 + 2)
3064 /* zero-fill, checksum, transfer end and line termination space. */
3066 /* The amount of binary data loaded from the object file in a single
3068 #define BINCHUNK (1024)
3070 /* Maximum line of data accepted by the monitor: */
3071 #define MAXRECSIZE (550)
3072 /* NOTE: This constant depends on the monitor being used. This value
3073 is for PMON 5.x on the Cogent Vr4300 board. */
3076 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3077 int inamount, int *recsize, unsigned int *csum,
3078 unsigned int *zerofill)
3083 /* This is a simple check to ensure that our data will fit within
3084 the maximum allowable record size. Each record output is 4bytes
3085 in length. We must allow space for a pending zero fill command,
3086 the record, and a checksum record. */
3087 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3089 /* Process the binary data: */
3090 if ((inamount - *inptr) < 3)
3093 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3095 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3097 *recsize += (2 + count);
3102 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3103 /* Simple check for zero data. TODO: A better check would be
3104 to check the last, and then the middle byte for being zero
3105 (if the first byte is not). We could then check for
3106 following runs of zeros, and if above a certain size it is
3107 worth the 4 or 8 character hit of the byte insertions used
3108 to pad to the start of the zeroes. NOTE: This also depends
3109 on the alignment at the end of the zero run. */
3110 if (value == 0x00000000)
3113 if (*zerofill == 0xFFF) /* 12bit counter */
3114 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3119 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3120 count = pmon_makeb64 (value, p, 24, csum);
3133 pmon_check_ack (char *mesg)
3135 #if defined(DOETXACK)
3140 c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc,
3142 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3144 fprintf_unfiltered (gdb_stderr,
3145 "Failed to receive valid ACK for %s\n", mesg);
3146 return (-1); /* terminate the download */
3149 #endif /* DOETXACK */
3153 /* pmon_download - Send a sequence of characters to the PMON download port,
3154 which is either a serial port or a UDP socket. */
3157 pmon_start_download (void)
3161 /* Create the temporary download file. */
3162 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3163 perror_with_name (tftp_localname);
3167 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3168 mips_expect ("Downloading from ");
3169 mips_expect (udp_in_use ? "udp" : "tty0");
3170 mips_expect (", ^C to abort\r\n");
3175 mips_expect_download (char *string)
3177 if (!mips_expect (string))
3179 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3181 remove (tftp_localname); /* Remove temporary file */
3189 pmon_check_entry_address (char *entry_address, int final)
3191 char hexnumber[9]; /* includes '\0' space */
3192 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3193 sprintf (hexnumber, "%x", final);
3194 mips_expect (hexnumber);
3195 mips_expect ("\r\n");
3199 pmon_check_total (int bintotal)
3201 char hexnumber[9]; /* includes '\0' space */
3202 mips_expect ("\r\ntotal = 0x");
3203 sprintf (hexnumber, "%x", bintotal);
3204 mips_expect (hexnumber);
3205 return mips_expect_download (" bytes\r\n");
3209 pmon_end_download (int final, int bintotal)
3211 char hexnumber[9]; /* includes '\0' space */
3215 static char *load_cmd_prefix = "load -b -s ";
3219 /* Close off the temporary file containing the load data. */
3223 /* Make the temporary file readable by the world. */
3224 if (stat (tftp_localname, &stbuf) == 0)
3225 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3227 /* Must reinitialize the board to prevent PMON from crashing. */
3228 mips_send_command ("initEther\r", -1);
3230 /* Send the load command. */
3231 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3232 strcpy (cmd, load_cmd_prefix);
3233 strcat (cmd, tftp_name);
3235 mips_send_command (cmd, 0);
3237 if (!mips_expect_download ("Downloading from "))
3239 if (!mips_expect_download (tftp_name))
3241 if (!mips_expect_download (", ^C to abort\r\n"))
3245 /* Wait for the stuff that PMON prints after the load has completed.
3246 The timeout value for use in the tftp case (15 seconds) was picked
3247 arbitrarily but might be too small for really large downloads. FIXME. */
3248 switch (mips_monitor)
3251 pmon_check_ack ("termination");
3252 pmon_check_entry_address ("Entry address is ", final);
3253 if (!pmon_check_total (bintotal))
3257 pmon_check_entry_address ("Entry Address = ", final);
3258 pmon_check_ack ("termination");
3259 if (!pmon_check_total (bintotal))
3265 remove (tftp_localname); /* Remove temporary file */
3269 pmon_download (char *buffer, int length)
3272 fwrite (buffer, 1, length, tftp_file);
3274 SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length);
3278 pmon_load_fast (char *file)
3282 unsigned char *binbuf;
3285 unsigned int csum = 0;
3286 int hashmark = !tftp_in_use;
3291 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3292 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3294 abfd = bfd_openr (file, 0);
3297 printf_filtered ("Unable to open file %s\n", file);
3301 if (bfd_check_format (abfd, bfd_object) == 0)
3303 printf_filtered ("File is not an object file\n");
3307 /* Setup the required download state: */
3308 mips_send_command ("set dlproto etxack\r", -1);
3309 mips_send_command ("set dlecho off\r", -1);
3310 /* NOTE: We get a "cannot set variable" message if the variable is
3311 already defined to have the argument we give. The code doesn't
3312 care, since it just scans to the next prompt anyway. */
3313 /* Start the download: */
3314 pmon_start_download ();
3316 /* Zero the checksum */
3317 sprintf (buffer, "/Kxx\n");
3318 reclen = strlen (buffer);
3319 pmon_download (buffer, reclen);
3320 finished = pmon_check_ack ("/Kxx");
3322 for (s = abfd->sections; s && !finished; s = s->next)
3323 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3325 bintotal += s->_raw_size;
3326 final = (s->vma + s->_raw_size);
3328 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3329 (unsigned int) (s->vma + s->_raw_size));
3330 gdb_flush (gdb_stdout);
3332 /* Output the starting address */
3333 sprintf (buffer, "/A");
3334 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3335 buffer[2 + reclen] = '\n';
3336 buffer[3 + reclen] = '\0';
3337 reclen += 3; /* for the initial escape code and carriage return */
3338 pmon_download (buffer, reclen);
3339 finished = pmon_check_ack ("/A");
3343 unsigned int binamount;
3344 unsigned int zerofill = 0;
3350 for (i = 0; ((i < s->_raw_size) && !finished); i += binamount)
3354 binamount = min (BINCHUNK, s->_raw_size - i);
3356 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3358 /* This keeps a rolling checksum, until we decide to output
3360 for (; ((binamount - binptr) > 0);)
3362 pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill);
3363 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3365 reclen = pmon_checkset (reclen, &bp, &csum);
3366 pmon_download (buffer, reclen);
3367 finished = pmon_check_ack ("data record");
3370 zerofill = 0; /* do not transmit pending zerofills */
3376 putchar_unfiltered ('#');
3377 gdb_flush (gdb_stdout);
3381 reclen = 0; /* buffer processed */
3386 /* Ensure no out-standing zerofill requests: */
3388 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3390 /* and then flush the line: */
3393 reclen = pmon_checkset (reclen, &bp, &csum);
3394 /* Currently pmon_checkset outputs the line terminator by
3395 default, so we write out the buffer so far: */
3396 pmon_download (buffer, reclen);
3397 finished = pmon_check_ack ("record remnant");
3401 putchar_unfiltered ('\n');
3404 /* Terminate the transfer. We know that we have an empty output
3405 buffer at this point. */
3406 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3407 reclen = strlen (buffer);
3408 pmon_download (buffer, reclen);
3411 { /* Ignore the termination message: */
3412 SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc);
3415 { /* Deal with termination message: */
3416 pmon_end_download (final, bintotal);
3422 /* mips_load -- download a file. */
3425 mips_load (char *file, int from_tty)
3427 /* Get the board out of remote debugging mode. */
3428 if (mips_exit_debug ())
3429 error ("mips_load: Couldn't get into monitor mode.");
3431 if (mips_monitor != MON_IDT)
3432 pmon_load_fast (file);
3434 mips_load_srec (file);
3438 /* Finally, make the PC point at the start address */
3439 if (mips_monitor != MON_IDT)
3441 /* Work around problem where PMON monitor updates the PC after a load
3442 to a different value than GDB thinks it has. The following ensures
3443 that the write_pc() WILL update the PC value: */
3444 register_valid[PC_REGNUM] = 0;
3447 write_pc (bfd_get_start_address (exec_bfd));
3449 inferior_pid = 0; /* No process now */
3451 /* This is necessary because many things were based on the PC at the time that
3452 we attached to the monitor, which is no longer valid now that we have loaded
3453 new code (and just changed the PC). Another way to do this might be to call
3454 normal_stop, except that the stack may not be valid, and things would get
3455 horribly confused... */
3457 clear_symtab_users ();
3461 /* Pass the command argument as a packet to PMON verbatim. */
3464 pmon_command (char *args, int from_tty)
3466 char buf[DATA_MAXLEN + 1];
3469 sprintf (buf, "0x0 %s", args);
3470 mips_send_packet (buf, 1);
3471 printf_filtered ("Send packet: %s\n", buf);
3473 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3475 printf_filtered ("Received packet: %s\n", buf);
3479 _initialize_remote_mips (void)
3481 /* Initialize the fields in mips_ops that are common to all four targets. */
3482 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3483 mips_ops.to_close = mips_close;
3484 mips_ops.to_detach = mips_detach;
3485 mips_ops.to_resume = mips_resume;
3486 mips_ops.to_fetch_registers = mips_fetch_registers;
3487 mips_ops.to_store_registers = mips_store_registers;
3488 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3489 mips_ops.to_xfer_memory = mips_xfer_memory;
3490 mips_ops.to_files_info = mips_files_info;
3491 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3492 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3493 mips_ops.to_kill = mips_kill;
3494 mips_ops.to_load = mips_load;
3495 mips_ops.to_create_inferior = mips_create_inferior;
3496 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3497 mips_ops.to_stratum = process_stratum;
3498 mips_ops.to_has_all_memory = 1;
3499 mips_ops.to_has_memory = 1;
3500 mips_ops.to_has_stack = 1;
3501 mips_ops.to_has_registers = 1;
3502 mips_ops.to_has_execution = 1;
3503 mips_ops.to_magic = OPS_MAGIC;
3505 /* Copy the common fields to all four target vectors. */
3506 pmon_ops = ddb_ops = lsi_ops = mips_ops;
3508 /* Initialize target-specific fields in the target vectors. */
3509 mips_ops.to_shortname = "mips";
3510 mips_ops.to_doc = "\
3511 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3512 The argument is the device it is connected to or, if it contains a colon,\n\
3513 HOST:PORT to access a board over a network";
3514 mips_ops.to_open = mips_open;
3515 mips_ops.to_wait = mips_wait;
3517 pmon_ops.to_shortname = "pmon";
3518 pmon_ops.to_doc = "\
3519 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3520 line. The argument is the device it is connected to or, if it contains a\n\
3521 colon, HOST:PORT to access a board over a network";
3522 pmon_ops.to_open = pmon_open;
3523 pmon_ops.to_wait = mips_wait;
3525 ddb_ops.to_shortname = "ddb";
3527 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3528 line. The first argument is the device it is connected to or, if it contains\n\
3529 a colon, HOST:PORT to access a board over a network. The optional second\n\
3530 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3531 TFTP downloads to the board. The optional third parameter is the local name\n\
3532 of the TFTP temporary file, if it differs from the filename seen by the board.";
3533 ddb_ops.to_open = ddb_open;
3534 ddb_ops.to_wait = mips_wait;
3536 lsi_ops.to_shortname = "lsi";
3537 lsi_ops.to_doc = pmon_ops.to_doc;
3538 lsi_ops.to_open = lsi_open;
3539 lsi_ops.to_wait = mips_wait;
3541 /* Add the targets. */
3542 add_target (&mips_ops);
3543 add_target (&pmon_ops);
3544 add_target (&ddb_ops);
3545 add_target (&lsi_ops);
3548 add_set_cmd ("timeout", no_class, var_zinteger,
3549 (char *) &mips_receive_wait,
3550 "Set timeout in seconds for remote MIPS serial I/O.",
3555 add_set_cmd ("retransmit-timeout", no_class, var_zinteger,
3556 (char *) &mips_retransmit_wait,
3557 "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\
3558 This is the number of seconds to wait for an acknowledgement to a packet\n\
3559 before resending the packet.", &setlist),
3563 add_set_cmd ("syn-garbage-limit", no_class, var_zinteger,
3564 (char *) &mips_syn_garbage,
3565 "Set the maximum number of characters to ignore when scanning for a SYN.\n\
3566 This is the maximum number of characters GDB will ignore when trying to\n\
3567 synchronize with the remote system. A value of -1 means that there is no limit\n\
3568 (Note that these characters are printed out even though they are ignored.)",
3573 (add_set_cmd ("monitor-prompt", class_obscure, var_string,
3574 (char *) &mips_monitor_prompt,
3575 "Set the prompt that GDB expects from the monitor.",
3580 add_set_cmd ("monitor-warnings", class_obscure, var_zinteger,
3581 (char *) &monitor_warnings,
3582 "Set printing of monitor warnings.\n"
3583 "When enabled, monitor warnings about hardware breakpoints "
3584 "will be displayed.",
3588 add_com ("pmon <command>", class_obscure, pmon_command,
3589 "Send a packet to PMON (must be in debug mode).");
3591 add_show_from_set (add_set_cmd ("mask-address", no_class,
3592 var_boolean, &mask_address_p,
3593 "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\
3594 Use \"on\" to enable the masking and \"off\" to disable it.\n",