1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support. Written by Ian Lance Taylor
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "exceptions.h"
34 #include "gdb_string.h"
38 #include "mips-tdep.h"
39 #include "gdbthread.h"
42 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
43 types passed by breakpoint.c to target_insert_watchpoint.
44 Value 3 is our own invention, and is used for ordinary instruction
45 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
55 /* Prototypes for local functions. */
57 static int mips_readchar (int timeout);
59 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
62 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
63 int *pch, int timeout);
65 static int mips_cksum (const unsigned char *hdr,
66 const 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 (struct target_ops *ops, char *args, int from_tty);
91 static int mips_map_regno (struct gdbarch *, int);
93 static void mips_set_register (int regno, ULONGEST value);
95 static void mips_prepare_to_store (struct regcache *regcache);
97 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
99 static int mips_store_word (CORE_ADDR addr, unsigned int value,
102 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
104 struct mem_attrib *attrib,
105 struct target_ops *target);
107 static void mips_files_info (struct target_ops *ignore);
109 static void mips_mourn_inferior (struct target_ops *ops);
111 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
113 static int pmon_zeroset (int recsize, char **buff, int *amount,
114 unsigned int *chksum);
116 static int pmon_checkset (int recsize, char **buff, int *value);
118 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
119 int *inptr, int inamount, int *recsize,
120 unsigned int *csum, unsigned int *zerofill);
122 static int pmon_check_ack (char *mesg);
124 static void pmon_start_download (void);
126 static void pmon_end_download (int final, int bintotal);
128 static void pmon_download (char *buffer, int length);
130 static void pmon_load_fast (char *file);
132 static void mips_load (char *file, int from_tty);
134 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
135 unsigned char *myaddr, int len);
137 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
139 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
140 enum break_type type);
142 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
143 enum break_type type);
145 /* Forward declarations. */
146 extern struct target_ops mips_ops;
147 extern struct target_ops pmon_ops;
148 extern struct target_ops ddb_ops;
149 extern struct target_ops rockhopper_ops;
151 /* The MIPS remote debugging interface is built on top of a simple
152 packet protocol. Each packet is organized as follows:
154 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
155 may not appear anywhere else in the packet. Any time a SYN is
156 seen, a new packet should be assumed to have begun.
159 This byte contains the upper five bits of the logical length
160 of the data section, plus a single bit indicating whether this
161 is a data packet or an acknowledgement. The documentation
162 indicates that this bit is 1 for a data packet, but the actual
163 board uses 1 for an acknowledgement. The value of the byte is
164 0x40 + (ack ? 0x20 : 0) + (len >> 6)
165 (we always have 0 <= len < 1024). Acknowledgement packets do
166 not carry data, and must have a data length of 0.
168 LEN1 This byte contains the lower six bits of the logical length of
169 the data section. The value is
172 SEQ This byte contains the six bit sequence number of the packet.
175 An acknowlegment packet contains the sequence number of the
176 packet being acknowledged plus 1 modulo 64. Data packets are
177 transmitted in sequence. There may only be one outstanding
178 unacknowledged data packet at a time. The sequence numbers
179 are independent in each direction. If an acknowledgement for
180 the previous packet is received (i.e., an acknowledgement with
181 the sequence number of the packet just sent) the packet just
182 sent should be retransmitted. If no acknowledgement is
183 received within a timeout period, the packet should be
184 retransmitted. This has an unfortunate failure condition on a
185 high-latency line, as a delayed acknowledgement may lead to an
186 endless series of duplicate packets.
188 DATA The actual data bytes follow. The following characters are
189 escaped inline with DLE (ASCII 020, or ^P):
195 The additional DLE characters are not counted in the logical
196 length stored in the TYPE_LEN and LEN1 bytes.
201 These bytes contain an 18 bit checksum of the complete
202 contents of the packet excluding the SEQ byte and the
203 CSUM[123] bytes. The checksum is simply the twos complement
204 addition of all the bytes treated as unsigned characters. The
205 values of the checksum bytes are:
206 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
207 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
208 CSUM3: 0x40 + (cksum & 0x3f)
210 It happens that the MIPS remote debugging protocol always
211 communicates with ASCII strings. Because of this, this
212 implementation doesn't bother to handle the DLE quoting mechanism,
213 since it will never be required. */
217 /* The SYN character which starts each packet. */
220 /* The 0x40 used to offset each packet (this value ensures that all of
221 the header and trailer bytes, other than SYN, are printable ASCII
223 #define HDR_OFFSET 0x40
225 /* The indices of the bytes in the packet header. */
226 #define HDR_INDX_SYN 0
227 #define HDR_INDX_TYPE_LEN 1
228 #define HDR_INDX_LEN1 2
229 #define HDR_INDX_SEQ 3
232 /* The data/ack bit in the TYPE_LEN header byte. */
233 #define TYPE_LEN_DA_BIT 0x20
234 #define TYPE_LEN_DATA 0
235 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
237 /* How to compute the header bytes. */
238 #define HDR_SET_SYN(data, len, seq) (SYN)
239 #define HDR_SET_TYPE_LEN(data, len, seq) \
241 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
242 + (((len) >> 6) & 0x1f))
243 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
244 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
246 /* Check that a header byte is reasonable. */
247 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
249 /* Get data from the header. These macros evaluate their argument
251 #define HDR_IS_DATA(hdr) \
252 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
253 #define HDR_GET_LEN(hdr) \
254 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
255 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
257 /* The maximum data length. */
258 #define DATA_MAXLEN 1023
260 /* The trailer offset. */
261 #define TRLR_OFFSET HDR_OFFSET
263 /* The indices of the bytes in the packet trailer. */
264 #define TRLR_INDX_CSUM1 0
265 #define TRLR_INDX_CSUM2 1
266 #define TRLR_INDX_CSUM3 2
267 #define TRLR_LENGTH 3
269 /* How to compute the trailer bytes. */
270 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
271 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
272 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
274 /* Check that a trailer byte is reasonable. */
275 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
277 /* Get data from the trailer. This evaluates its argument multiple
279 #define TRLR_GET_CKSUM(trlr) \
280 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
281 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
282 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
284 /* The sequence number modulos. */
285 #define SEQ_MODULOS (64)
287 /* PMON commands to load from the serial port or UDP socket. */
288 #define LOAD_CMD "load -b -s tty0\r"
289 #define LOAD_CMD_UDP "load -b -s udp\r"
291 /* The target vectors for the four different remote MIPS targets.
292 These are initialized with code in _initialize_remote_mips instead
293 of static initializers, to make it easier to extend the target_ops
295 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
297 enum mips_monitor_type
299 /* IDT/SIM monitor being used: */
301 /* PMON monitor being used: */
302 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */
303 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */
304 MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
306 /* Last and unused value, for sizing vectors, etc. */
309 static enum mips_monitor_type mips_monitor = MON_LAST;
311 /* The monitor prompt text. If the user sets the PMON prompt
312 to some new value, the GDB `set monitor-prompt' command must also
313 be used to inform GDB about the expected prompt. Otherwise, GDB
314 will not be able to connect to PMON in mips_initialize().
315 If the `set monitor-prompt' command is not used, the expected
316 default prompt will be set according the target:
323 static char *mips_monitor_prompt;
325 /* Set to 1 if the target is open. */
326 static int mips_is_open;
328 /* Currently active target description (if mips_is_open == 1) */
329 static struct target_ops *current_ops;
331 /* Set to 1 while the connection is being initialized. */
332 static int mips_initializing;
334 /* Set to 1 while the connection is being brought down. */
335 static int mips_exiting;
337 /* The next sequence number to send. */
338 static unsigned int mips_send_seq;
340 /* The next sequence number we expect to receive. */
341 static unsigned int mips_receive_seq;
343 /* The time to wait before retransmitting a packet, in seconds. */
344 static int mips_retransmit_wait = 3;
346 /* The number of times to try retransmitting a packet before giving up. */
347 static int mips_send_retries = 10;
349 /* The number of garbage characters to accept when looking for an
350 SYN for the next packet. */
351 static int mips_syn_garbage = 10;
353 /* The time to wait for a packet, in seconds. */
354 static int mips_receive_wait = 5;
356 /* Set if we have sent a packet to the board but have not yet received
358 static int mips_need_reply = 0;
360 /* Handle used to access serial I/O stream. */
361 static struct serial *mips_desc;
363 /* UDP handle used to download files to target. */
364 static struct serial *udp_desc;
365 static int udp_in_use;
367 /* TFTP filename used to download files to DDB board, in the form
369 static char *tftp_name; /* host:filename */
370 static char *tftp_localname; /* filename portion of above */
371 static int tftp_in_use;
372 static FILE *tftp_file;
374 /* Counts the number of times the user tried to interrupt the target (usually
376 static int interrupt_count;
378 /* If non-zero, means that the target is running. */
379 static int mips_wait_flag = 0;
381 /* If non-zero, monitor supports breakpoint commands. */
382 static int monitor_supports_breakpoints = 0;
384 /* Data cache header. */
386 #if 0 /* not used (yet?) */
387 static DCACHE *mips_dcache;
390 /* Non-zero means that we've just hit a read or write watchpoint */
391 static int hit_watchpoint;
393 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
394 The table is indexed by a breakpoint number, which is an integer
395 from 0 to 255 returned by the LSI PMON when a breakpoint is set.
397 #define MAX_LSI_BREAKPOINTS 256
398 struct lsi_breakpoint_info
400 enum break_type type; /* type of breakpoint */
401 CORE_ADDR addr; /* address of breakpoint */
402 int len; /* length of region being watched */
403 unsigned long value; /* value to watch */
405 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
407 /* Error/warning codes returned by LSI PMON for breakpoint commands.
408 Warning values may be ORed together; error values may not. */
409 #define W_WARN 0x100 /* This bit is set if the error code is a warning */
410 #define W_MSK 0x101 /* warning: Range feature is supported via mask */
411 #define W_VAL 0x102 /* warning: Value check is not supported in hardware */
412 #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */
414 #define E_ERR 0x200 /* This bit is set if the error code is an error */
415 #define E_BPT 0x200 /* error: No such breakpoint number */
416 #define E_RGE 0x201 /* error: Range is not supported */
417 #define E_QAL 0x202 /* error: The requested qualifiers can not be used */
418 #define E_OUT 0x203 /* error: Out of hardware resources */
419 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
423 int code; /* error code */
424 char *string; /* string associated with this code */
427 struct lsi_error lsi_warning_table[] =
429 {W_MSK, "Range feature is supported via mask"},
430 {W_VAL, "Value check is not supported in hardware"},
431 {W_QAL, "Requested qualifiers are not supported in hardware"},
435 struct lsi_error lsi_error_table[] =
437 {E_BPT, "No such breakpoint number"},
438 {E_RGE, "Range is not supported"},
439 {E_QAL, "The requested qualifiers can not be used"},
440 {E_OUT, "Out of hardware resources"},
441 {E_NON, "Hardware breakpoint not supported"},
445 /* Set to 1 with the 'set monitor-warnings' command to enable printing
446 of warnings returned by PMON when hardware breakpoints are used. */
447 static int monitor_warnings;
449 /* This is the ptid we use while we're connected to the remote. Its
450 value is arbitrary, as the remote-mips target doesn't have a notion of
451 processes or threads, but we need something non-null to place in
453 static ptid_t remote_mips_ptid;
455 /* Close any ports which might be open. Reset certain globals indicating
456 the state of those ports. */
462 serial_close (mips_desc);
466 serial_close (udp_desc);
472 /* Handle low-level error that we can't recover from. Note that just
473 error()ing out from target_wait or some such low-level place will cause
474 all hell to break loose--the rest of GDB will tend to get left in an
475 inconsistent state. */
477 static void ATTRIBUTE_NORETURN
478 mips_error (char *string,...)
482 va_start (args, string);
484 target_terminal_ours ();
485 wrap_here (""); /* Force out any buffered output */
486 gdb_flush (gdb_stdout);
488 fputs_filtered (error_pre_print, gdb_stderr);
489 vfprintf_filtered (gdb_stderr, string, args);
490 fprintf_filtered (gdb_stderr, "\n");
492 gdb_flush (gdb_stderr);
494 /* Clean up in such a way that mips_close won't try to talk to the
495 board (it almost surely won't work since we weren't able to talk to
499 printf_unfiltered ("Ending remote MIPS debugging.\n");
500 if (!ptid_equal (inferior_ptid, null_ptid))
501 target_mourn_inferior ();
503 deprecated_throw_reason (RETURN_ERROR);
506 /* putc_readable - print a character, displaying non-printable chars in
507 ^x notation or in hex. */
510 fputc_readable (int ch, struct ui_file *file)
513 fputc_unfiltered ('\n', file);
515 fprintf_unfiltered (file, "\\r");
516 else if (ch < 0x20) /* ASCII control character */
517 fprintf_unfiltered (file, "^%c", ch + '@');
518 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
519 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
521 fputc_unfiltered (ch, file);
525 /* puts_readable - print a string, displaying non-printable chars in
526 ^x notation or in hex. */
529 fputs_readable (const char *string, struct ui_file *file)
533 while ((c = *string++) != '\0')
534 fputc_readable (c, file);
538 /* Read P as a hex value. Return true if every character made sense,
539 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
542 read_hex_value (const char *p, ULONGEST *result)
550 if (*p >= '0' && *p <= '9')
552 else if (*p >= 'A' && *p <= 'F')
553 retval |= *p - 'A' + 10;
554 else if (*p >= 'a' && *p <= 'f')
555 retval |= *p - 'a' + 10;
565 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
566 timed out. TIMEOUT specifies timeout value in seconds.
570 mips_expect_timeout (const char *string, int timeout)
572 const char *p = string;
576 fprintf_unfiltered (gdb_stdlog, "Expected \"");
577 fputs_readable (string, gdb_stdlog);
578 fprintf_unfiltered (gdb_stdlog, "\", got \"");
586 /* Must use serial_readchar() here cuz mips_readchar would get
587 confused if we were waiting for the mips_monitor_prompt... */
589 c = serial_readchar (mips_desc, timeout);
591 if (c == SERIAL_TIMEOUT)
594 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
599 fputc_readable (c, gdb_stdlog);
607 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
620 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
621 timed out. The timeout value is hard-coded to 2 seconds. Use
622 mips_expect_timeout if a different timeout value is needed.
626 mips_expect (const char *string)
628 return mips_expect_timeout (string, remote_timeout);
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);
652 { /* FIXME this whole block is dead code! */
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 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
1233 char myBuff[DATA_MAXLEN + 1];
1234 char response_string[17];
1241 if (buff == (char *) NULL)
1246 if (mips_need_reply)
1247 internal_error (__FILE__, __LINE__,
1248 _("mips_request: Trying to send command before reply"));
1249 /* 'T' sets a register to a 64-bit value, so make sure we use
1250 the right conversion function. */
1252 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1253 phex_nz (addr, addr_size), phex_nz (data, 8));
1255 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1256 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1258 mips_send_packet (buff, 1);
1259 mips_need_reply = 1;
1262 if (perr == (int *) NULL)
1265 if (!mips_need_reply)
1266 internal_error (__FILE__, __LINE__,
1267 _("mips_request: Trying to get reply before command"));
1269 mips_need_reply = 0;
1271 len = mips_receive_packet (buff, 1, timeout);
1274 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1275 &rpid, &rcmd, &rerrflg, response_string) != 4
1276 || !read_hex_value (response_string, &rresponse)
1277 || (cmd != '\0' && rcmd != cmd))
1278 mips_error ("Bad response from remote board");
1284 /* FIXME: This will returns MIPS errno numbers, which may or may
1285 not be the same as errno values used on other systems. If
1286 they stick to common errno values, they will be the same, but
1287 if they don't, they must be translated. */
1297 /* Cleanup associated with mips_initialize(). */
1300 mips_initialize_cleanups (void *arg)
1302 mips_initializing = 0;
1305 /* Cleanup associated with mips_exit_debug(). */
1308 mips_exit_cleanups (void *arg)
1313 /* Send a command and wait for that command to be echoed back. Wait,
1314 too, for the following prompt. */
1317 mips_send_command (const char *cmd, int prompt)
1319 serial_write (mips_desc, cmd, strlen (cmd));
1323 mips_expect (mips_monitor_prompt);
1326 /* Enter remote (dbx) debug mode: */
1329 mips_enter_debug (void)
1331 /* Reset the sequence numbers, ready for the new debug sequence: */
1333 mips_receive_seq = 0;
1335 if (mips_monitor != MON_IDT)
1336 mips_send_command ("debug\r", 0);
1337 else /* assume IDT monitor by default */
1338 mips_send_command ("db tty0\r", 0);
1341 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1343 /* We don't need to absorb any spurious characters here, since the
1344 mips_receive_header will eat up a reasonable number of characters
1345 whilst looking for the SYN, however this avoids the "garbage"
1346 being displayed to the user. */
1347 if (mips_monitor != MON_IDT)
1351 char buff[DATA_MAXLEN + 1];
1353 if (mips_receive_packet (buff, 1, 3) < 0)
1354 mips_error ("Failed to initialize (didn't receive packet).");
1358 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1361 mips_exit_debug (void)
1364 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1368 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1370 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1371 so we do not get a reply to this command: */
1372 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1373 mips_need_reply = 0;
1374 if (!mips_expect (" break!"))
1378 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1380 if (!mips_expect (mips_monitor_prompt))
1383 do_cleanups (old_cleanups);
1388 /* Initialize a new connection to the MIPS board, and make sure we are
1389 really connected. */
1392 mips_initialize (void)
1395 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1398 /* What is this code doing here? I don't see any way it can happen, and
1399 it might mean mips_initializing didn't get cleared properly.
1400 So I'll make it a warning. */
1402 if (mips_initializing)
1404 warning ("internal error: mips_initialize called twice");
1409 mips_initializing = 1;
1411 /* At this point, the packit protocol isn't responding. We'll try getting
1412 into the monitor, and restarting the protocol. */
1414 /* Force the system into the monitor. After this we *should* be at
1415 the mips_monitor_prompt. */
1416 if (mips_monitor != MON_IDT)
1417 j = 0; /* start by checking if we are already at the prompt */
1419 j = 1; /* start by sending a break */
1424 case 0: /* First, try sending a CR */
1425 serial_flush_input (mips_desc);
1426 serial_write (mips_desc, "\r", 1);
1428 case 1: /* First, try sending a break */
1429 serial_send_break (mips_desc);
1431 case 2: /* Then, try a ^C */
1432 serial_write (mips_desc, "\003", 1);
1434 case 3: /* Then, try escaping from download */
1436 if (mips_monitor != MON_IDT)
1440 /* We shouldn't need to send multiple termination
1441 sequences, since the target performs line (or
1442 block) reads, and then processes those
1443 packets. In-case we were downloading a large packet
1444 we flush the output buffer before inserting a
1445 termination sequence. */
1446 serial_flush_output (mips_desc);
1447 sprintf (tbuff, "\r/E/E\r");
1448 serial_write (mips_desc, tbuff, 6);
1455 /* We are possibly in binary download mode, having
1456 aborted in the middle of an S-record. ^C won't
1457 work because of binary mode. The only reliable way
1458 out is to send enough termination packets (8 bytes)
1459 to fill up and then overflow the largest size
1460 S-record (255 bytes in this case). This amounts to
1464 mips_make_srec (srec, '7', 0, NULL, 0);
1466 for (i = 1; i <= 33; i++)
1468 serial_write (mips_desc, srec, 8);
1470 if (serial_readchar (mips_desc, 0) >= 0)
1471 break; /* Break immediatly if we get something from
1478 mips_error ("Failed to initialize.");
1481 if (mips_expect (mips_monitor_prompt))
1485 if (mips_monitor != MON_IDT)
1487 /* Sometimes PMON ignores the first few characters in the first
1488 command sent after a load. Sending a blank command gets
1490 mips_send_command ("\r", -1);
1492 /* Ensure the correct target state: */
1493 if (mips_monitor != MON_LSI)
1494 mips_send_command ("set regsize 64\r", -1);
1495 mips_send_command ("set hostport tty0\r", -1);
1496 mips_send_command ("set brkcmd \"\"\r", -1);
1497 /* Delete all the current breakpoints: */
1498 mips_send_command ("db *\r", -1);
1499 /* NOTE: PMON does not have breakpoint support through the
1500 "debug" mode, only at the monitor command-line. */
1503 mips_enter_debug ();
1505 /* Clear all breakpoints: */
1506 if ((mips_monitor == MON_IDT
1507 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1508 || mips_monitor == MON_LSI)
1509 monitor_supports_breakpoints = 1;
1511 monitor_supports_breakpoints = 0;
1513 do_cleanups (old_cleanups);
1515 /* If this doesn't call error, we have connected; we don't care if
1516 the request itself succeeds or fails. */
1518 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1521 /* Open a connection to the remote board. */
1524 common_open (struct target_ops *ops, char *name, int from_tty,
1525 enum mips_monitor_type new_monitor,
1526 const char *new_monitor_prompt)
1529 char *serial_port_name;
1530 char *remote_name = 0;
1531 char *local_name = 0;
1536 "To open a MIPS remote debugging connection, you need to specify what serial\n\
1537 device is attached to the target board (e.g., /dev/ttya).\n"
1538 "If you want to use TFTP to download to the board, specify the name of a\n"
1539 "temporary file to be used by GDB for downloads as the second argument.\n"
1540 "This filename must be in the form host:filename, where host is the name\n"
1541 "of the host running the TFTP server, and the file must be readable by the\n"
1542 "world. If the local name of the temporary file differs from the name as\n"
1543 "seen from the board via TFTP, specify that name as the third parameter.\n");
1545 /* Parse the serial port name, the optional TFTP name, and the
1546 optional local TFTP name. */
1547 argv = gdb_buildargv (name);
1548 make_cleanup_freeargv (argv);
1550 serial_port_name = xstrdup (argv[0]);
1551 if (argv[1]) /* remote TFTP name specified? */
1553 remote_name = argv[1];
1554 if (argv[2]) /* local TFTP filename specified? */
1555 local_name = argv[2];
1558 target_preopen (from_tty);
1561 unpush_target (current_ops);
1563 /* Open and initialize the serial port. */
1564 mips_desc = serial_open (serial_port_name);
1565 if (mips_desc == NULL)
1566 perror_with_name (serial_port_name);
1568 if (baud_rate != -1)
1570 if (serial_setbaudrate (mips_desc, baud_rate))
1572 serial_close (mips_desc);
1573 perror_with_name (serial_port_name);
1577 serial_raw (mips_desc);
1579 /* Open and initialize the optional download port. If it is in the form
1580 hostname#portnumber, it's a UDP socket. If it is in the form
1581 hostname:filename, assume it's the TFTP filename that must be
1582 passed to the DDB board to tell it where to get the load file. */
1585 if (strchr (remote_name, '#'))
1587 udp_desc = serial_open (remote_name);
1589 perror_with_name ("Unable to open UDP port");
1594 /* Save the remote and local names of the TFTP temp file. If
1595 the user didn't specify a local name, assume it's the same
1596 as the part of the remote name after the "host:". */
1600 xfree (tftp_localname);
1601 if (local_name == NULL)
1602 if ((local_name = strchr (remote_name, ':')) != NULL)
1603 local_name++; /* skip over the colon */
1604 if (local_name == NULL)
1605 local_name = remote_name; /* local name same as remote name */
1606 tftp_name = xstrdup (remote_name);
1607 tftp_localname = xstrdup (local_name);
1615 /* Reset the expected monitor prompt if it's never been set before. */
1616 if (mips_monitor_prompt == NULL)
1617 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1618 mips_monitor = new_monitor;
1623 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1625 /* Switch to using remote target now. */
1628 inferior_ptid = remote_mips_ptid;
1629 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1630 add_thread_silent (inferior_ptid);
1632 /* Try to figure out the processor model if possible. */
1633 deprecated_mips_set_processor_regs_hack ();
1635 /* This is really the job of start_remote however, that makes an
1636 assumption that the target is about to print out a status message
1637 of some sort. That doesn't happen here (in fact, it may not be
1638 possible to get the monitor to send the appropriate packet). */
1640 reinit_frame_cache ();
1641 registers_changed ();
1642 stop_pc = regcache_read_pc (get_current_regcache ());
1643 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC);
1644 xfree (serial_port_name);
1647 /* Open a connection to an IDT board. */
1650 mips_open (char *name, int from_tty)
1652 const char *monitor_prompt = NULL;
1653 if (gdbarch_bfd_arch_info (target_gdbarch) != NULL
1654 && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips)
1656 switch (gdbarch_bfd_arch_info (target_gdbarch)->mach)
1658 case bfd_mach_mips4100:
1659 case bfd_mach_mips4300:
1660 case bfd_mach_mips4600:
1661 case bfd_mach_mips4650:
1662 case bfd_mach_mips5000:
1663 monitor_prompt = "<RISQ> ";
1667 if (monitor_prompt == NULL)
1668 monitor_prompt = "<IDT>";
1669 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1672 /* Open a connection to a PMON board. */
1675 pmon_open (char *name, int from_tty)
1677 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1680 /* Open a connection to a DDB board. */
1683 ddb_open (char *name, int from_tty)
1685 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1688 /* Open a connection to a rockhopper board. */
1691 rockhopper_open (char *name, int from_tty)
1693 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1696 /* Open a connection to an LSI board. */
1699 lsi_open (char *name, int from_tty)
1703 /* Clear the LSI breakpoint table. */
1704 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1705 lsi_breakpoints[i].type = BREAK_UNUSED;
1707 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1710 /* Close a connection to the remote board. */
1713 mips_close (int quitting)
1717 /* Get the board out of remote debugging mode. */
1718 (void) mips_exit_debug ();
1723 generic_mourn_inferior ();
1726 /* Detach from the remote board. */
1729 mips_detach (struct target_ops *ops, char *args, int from_tty)
1732 error ("Argument given to \"detach\" when remotely debugging.");
1739 printf_unfiltered ("Ending remote MIPS debugging.\n");
1742 /* Tell the target board to resume. This does not wait for a reply
1743 from the board, except in the case of single-stepping on LSI boards,
1744 where PMON does return a reply. */
1747 mips_resume (struct target_ops *ops,
1748 ptid_t ptid, int step, enum target_signal siggnal)
1752 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1753 a single step, so we wait for that. */
1754 mips_request (step ? 's' : 'c', 1, siggnal,
1755 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1756 mips_receive_wait, NULL);
1759 /* Return the signal corresponding to SIG, where SIG is the number which
1760 the MIPS protocol uses for the signal. */
1762 static enum target_signal
1763 mips_signal_from_protocol (int sig)
1765 /* We allow a few more signals than the IDT board actually returns, on
1766 the theory that there is at least *some* hope that perhaps the numbering
1767 for these signals is widely agreed upon. */
1770 return TARGET_SIGNAL_UNKNOWN;
1772 /* Don't want to use target_signal_from_host because we are converting
1773 from MIPS signal numbers, not host ones. Our internal numbers
1774 match the MIPS numbers for the signals the board can return, which
1775 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1776 return (enum target_signal) sig;
1779 /* Set the register designated by REGNO to the value designated by VALUE. */
1782 mips_set_register (int regno, ULONGEST value)
1784 char buf[MAX_REGISTER_SIZE];
1785 struct regcache *regcache = get_current_regcache ();
1786 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1787 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1789 /* We got the number the register holds, but gdb expects to see a
1790 value in the target byte ordering. */
1792 if (mips_monitor != MON_ROCKHOPPER
1793 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1794 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1795 In such cases we can only really debug 32-bit code properly so,
1796 when reading a GPR or the PC, assume that the full 64-bit
1797 value is the sign extension of the lower 32 bits. */
1798 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1801 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1804 regcache_raw_supply (regcache, regno, buf);
1807 /* Wait until the remote stops, and return a wait status. */
1810 mips_wait (struct target_ops *ops,
1811 ptid_t ptid, struct target_waitstatus *status, int options)
1815 char buff[DATA_MAXLEN];
1816 ULONGEST rpc, rfp, rsp;
1817 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1821 interrupt_count = 0;
1824 /* If we have not sent a single step or continue command, then the
1825 board is waiting for us to do something. Return a status
1826 indicating that it is stopped. */
1827 if (!mips_need_reply)
1829 status->kind = TARGET_WAITKIND_STOPPED;
1830 status->value.sig = TARGET_SIGNAL_TRAP;
1831 return inferior_ptid;
1834 /* No timeout; we sit here as long as the program continues to execute. */
1836 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1839 mips_error ("Remote failure: %s", safe_strerror (errno));
1841 /* On returning from a continue, the PMON monitor seems to start
1842 echoing back the messages we send prior to sending back the
1843 ACK. The code can cope with this, but to try and avoid the
1844 unnecessary serial traffic, and "spurious" characters displayed
1845 to the user, we cheat and reset the debug protocol. The problems
1846 seems to be caused by a check on the number of arguments, and the
1847 command length, within the monitor causing it to echo the command
1849 if (mips_monitor == MON_PMON)
1852 mips_enter_debug ();
1855 /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */
1857 nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1858 pc_string, fp_string, sp_string, flags);
1860 && read_hex_value (pc_string, &rpc)
1861 && read_hex_value (fp_string, &rfp)
1862 && read_hex_value (sp_string, &rsp))
1864 struct regcache *regcache = get_current_regcache ();
1865 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1867 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1868 mips_set_register (30, rfp);
1869 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1875 for (i = 0; i <= 2; i++)
1876 if (flags[i] == 'r' || flags[i] == 'w')
1878 else if (flags[i] == '\000')
1883 if (strcmp (target_shortname, "lsi") == 0)
1886 /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint.
1887 Right now, PMON doesn't give us enough information to determine which
1888 breakpoint we hit. So we have to look up the PC in our own table
1889 of breakpoints, and if found, assume it's just a normal instruction
1890 fetch breakpoint, not a data watchpoint. FIXME when PMON
1891 provides some way to tell us what type of breakpoint it is. */
1893 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1896 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1898 if (lsi_breakpoints[i].addr == pc
1899 && lsi_breakpoints[i].type == BREAK_FETCH)
1906 /* If a data breakpoint was hit, PMON returns the following packet:
1908 The return packet from an ordinary breakpoint doesn't have the
1909 extra 0x01 field tacked onto the end. */
1910 if (nfields == 1 && rpc == 1)
1915 /* NOTE: The following (sig) numbers are defined by PMON:
1916 SPP_SIGTRAP 5 breakpoint
1924 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1925 and so on, because the constants we want here are determined by the
1926 MIPS protocol and have nothing to do with what host we are running on. */
1927 if ((rstatus & 0xff) == 0)
1929 status->kind = TARGET_WAITKIND_EXITED;
1930 status->value.integer = (((rstatus) >> 8) & 0xff);
1932 else if ((rstatus & 0xff) == 0x7f)
1934 status->kind = TARGET_WAITKIND_STOPPED;
1935 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1937 /* If the stop PC is in the _exit function, assume
1938 we hit the 'break 0x3ff' instruction in _exit, so this
1939 is not a normal breakpoint. */
1940 if (strcmp (target_shortname, "lsi") == 0)
1943 CORE_ADDR func_start;
1944 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1946 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1947 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1948 && func_start == pc)
1949 status->kind = TARGET_WAITKIND_EXITED;
1954 status->kind = TARGET_WAITKIND_SIGNALLED;
1955 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1958 return inferior_ptid;
1961 /* We have to map between the register numbers used by gdb and the
1962 register numbers used by the debugging protocol. */
1964 #define REGNO_OFFSET 96
1967 mips_map_regno (struct gdbarch *gdbarch, int regno)
1971 if (regno >= mips_regnum (gdbarch)->fp0
1972 && regno < mips_regnum (gdbarch)->fp0 + 32)
1973 return regno - mips_regnum (gdbarch)->fp0 + 32;
1974 else if (regno == mips_regnum (gdbarch)->pc)
1975 return REGNO_OFFSET + 0;
1976 else if (regno == mips_regnum (gdbarch)->cause)
1977 return REGNO_OFFSET + 1;
1978 else if (regno == mips_regnum (gdbarch)->hi)
1979 return REGNO_OFFSET + 2;
1980 else if (regno == mips_regnum (gdbarch)->lo)
1981 return REGNO_OFFSET + 3;
1982 else if (regno == mips_regnum (gdbarch)->fp_control_status)
1983 return REGNO_OFFSET + 4;
1984 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
1985 return REGNO_OFFSET + 5;
1987 /* FIXME: Is there a way to get the status register? */
1991 /* Fetch the remote registers. */
1994 mips_fetch_registers (struct target_ops *ops,
1995 struct regcache *regcache, int regno)
1997 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1998 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2004 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2005 mips_fetch_registers (ops, regcache, regno);
2009 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2010 || regno == MIPS_ZERO_REGNUM)
2011 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2012 supposed to read zero (see also mips-nat.c). */
2016 /* If PMON doesn't support this register, don't waste serial
2017 bandwidth trying to read it. */
2018 int pmon_reg = mips_map_regno (gdbarch, regno);
2020 if (regno != 0 && pmon_reg == 0)
2024 /* Unfortunately the PMON version in the Vr4300 board has been
2025 compiled without the 64bit register access commands. This
2026 means we cannot get hold of the full register width. */
2027 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2028 val = mips_request ('t', pmon_reg, 0,
2029 &err, mips_receive_wait, NULL);
2031 val = mips_request ('r', pmon_reg, 0,
2032 &err, mips_receive_wait, NULL);
2034 mips_error ("Can't read register %d: %s", regno,
2035 safe_strerror (errno));
2039 mips_set_register (regno, val);
2042 /* Prepare to store registers. The MIPS protocol can store individual
2043 registers, so this function doesn't have to do anything. */
2046 mips_prepare_to_store (struct regcache *regcache)
2050 /* Store remote register(s). */
2053 mips_store_registers (struct target_ops *ops,
2054 struct regcache *regcache, int regno)
2056 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2062 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2063 mips_store_registers (ops, regcache, regno);
2067 regcache_cooked_read_unsigned (regcache, regno, &val);
2068 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2069 mips_map_regno (gdbarch, regno),
2071 &err, mips_receive_wait, NULL);
2073 mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
2076 /* Fetch a word from the target board. Return word fetched in location
2077 addressed by VALP. Return 0 when successful; return positive error
2081 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2085 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2088 /* Data space failed; try instruction space. */
2089 *valp = mips_request ('i', addr, 0, &err,
2090 mips_receive_wait, NULL);
2095 /* Store a word to the target board. Returns errno code or zero for
2096 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2097 memory location there. */
2099 /* FIXME! make sure only 32-bit quantities get stored! */
2101 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2104 unsigned int oldcontents;
2106 oldcontents = mips_request ('D', addr, val, &err,
2107 mips_receive_wait, NULL);
2110 /* Data space failed; try instruction space. */
2111 oldcontents = mips_request ('I', addr, val, &err,
2112 mips_receive_wait, NULL);
2116 if (old_contents != NULL)
2117 *old_contents = oldcontents;
2121 /* Read or write LEN bytes from inferior memory at MEMADDR,
2122 transferring to or from debugger address MYADDR. Write to inferior
2123 if SHOULD_WRITE is nonzero. Returns length of data written or
2124 read; 0 for error. Note that protocol gives us the correct value
2125 for a longword, since it transfers values in ASCII. We want the
2126 byte values, so we have to swap the longword values. */
2128 static int mask_address_p = 1;
2131 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2132 struct mem_attrib *attrib, struct target_ops *target)
2134 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
2141 /* PMON targets do not cope well with 64 bit addresses. Mask the
2142 value down to 32 bits. */
2144 memaddr &= (CORE_ADDR) 0xffffffff;
2146 /* Round starting address down to longword boundary. */
2147 addr = memaddr & ~3;
2148 /* Round ending address up; get number of longwords that makes. */
2149 count = (((memaddr + len) - addr) + 3) / 4;
2150 /* Allocate buffer of that many longwords. */
2151 buffer = alloca (count * 4);
2155 /* Fill start and end extra bytes of buffer with existing data. */
2156 if (addr != memaddr || len < 4)
2160 if (mips_fetch_word (addr, &val))
2163 /* Need part of initial word -- fetch it. */
2164 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2171 /* Need part of last word -- fetch it. FIXME: we do this even
2172 if we don't need it. */
2173 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2176 store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order, val);
2179 /* Copy data to be written over corresponding part of buffer */
2181 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2183 /* Write the entire buffer. */
2185 for (i = 0; i < count; i++, addr += 4)
2189 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2190 status = mips_store_word (addr, word, NULL);
2191 /* Report each kilobyte (we download 32-bit words at a time) */
2194 printf_unfiltered ("*");
2195 gdb_flush (gdb_stdout);
2202 /* FIXME: Do we want a QUIT here? */
2205 printf_unfiltered ("\n");
2209 /* Read all the longwords */
2210 for (i = 0; i < count; i++, addr += 4)
2214 if (mips_fetch_word (addr, &val))
2217 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2221 /* Copy appropriate bytes out of the buffer. */
2222 memcpy (myaddr, buffer + (memaddr & 3), len);
2227 /* Print info on this target. */
2230 mips_files_info (struct target_ops *ignore)
2232 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2235 /* Kill the process running on the board. This will actually only
2236 work if we are doing remote debugging over the console input. I
2237 think that if IDT/sim had the remote debug interrupt enabled on the
2238 right port, we could interrupt the process with a break signal. */
2241 mips_kill (struct target_ops *ops)
2243 if (!mips_wait_flag)
2245 target_mourn_inferior ();
2251 if (interrupt_count >= 2)
2253 interrupt_count = 0;
2255 target_terminal_ours ();
2257 if (query (_("Interrupted while waiting for the program.\n\
2258 Give up (and stop debugging it)? ")))
2260 /* Clean up in such a way that mips_close won't try to talk to the
2261 board (it almost surely won't work since we weren't able to talk to
2266 printf_unfiltered ("Ending remote MIPS debugging.\n");
2267 target_mourn_inferior ();
2269 deprecated_throw_reason (RETURN_QUIT);
2272 target_terminal_inferior ();
2275 if (remote_debug > 0)
2276 printf_unfiltered ("Sending break\n");
2278 serial_send_break (mips_desc);
2280 target_mourn_inferior ();
2289 serial_write (mips_desc, &cc, 1);
2291 target_mourn_inferior ();
2296 /* Start running on the target board. */
2299 mips_create_inferior (struct target_ops *ops, char *execfile,
2300 char *args, char **env, int from_tty)
2307 Can't pass arguments to remote MIPS board; arguments ignored.");
2308 /* And don't try to use them on the next "run" command. */
2309 execute_command ("set args", 0);
2312 if (execfile == 0 || exec_bfd == 0)
2313 error ("No executable file specified");
2315 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2317 init_wait_for_inferior ();
2319 regcache_write_pc (get_current_regcache (), entry_pt);
2322 /* Clean up after a process. The bulk of the work is done in mips_close(),
2323 which is called when unpushing the target. */
2326 mips_mourn_inferior (struct target_ops *ops)
2328 if (current_ops != NULL)
2329 unpush_target (current_ops);
2332 /* We can write a breakpoint and read the shadow contents in one
2335 /* Insert a breakpoint. On targets that don't have built-in
2336 breakpoint support, we read the contents of the target location and
2337 stash it, then overwrite it with a breakpoint instruction. ADDR is
2338 the target location in the target machine. BPT is the breakpoint
2339 being inserted or removed, which contains memory for saving the
2343 mips_insert_breakpoint (struct gdbarch *gdbarch,
2344 struct bp_target_info *bp_tgt)
2346 if (monitor_supports_breakpoints)
2347 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2350 return memory_insert_breakpoint (gdbarch, bp_tgt);
2353 /* Remove a breakpoint. */
2356 mips_remove_breakpoint (struct gdbarch *gdbarch,
2357 struct bp_target_info *bp_tgt)
2359 if (monitor_supports_breakpoints)
2360 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2363 return memory_remove_breakpoint (gdbarch, bp_tgt);
2366 /* Tell whether this target can support a hardware breakpoint. CNT
2367 is the number of hardware breakpoints already installed. This
2368 implements the target_can_use_hardware_watchpoint macro. */
2371 mips_can_use_watchpoint (int type, int cnt, int othertype)
2373 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2377 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2378 This is used for memory ref breakpoints. */
2380 static unsigned long
2381 calculate_mask (CORE_ADDR addr, int len)
2386 mask = addr ^ (addr + len - 1);
2388 for (i = 32; i >= 0; i--)
2394 mask = (unsigned long) 0xffffffff >> i;
2400 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2401 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2405 mips_insert_watchpoint (CORE_ADDR addr, int len, int type,
2406 struct expression *cond)
2408 if (mips_set_breakpoint (addr, len, type))
2414 /* Remove a watchpoint. */
2417 mips_remove_watchpoint (CORE_ADDR addr, int len, int type,
2418 struct expression *cond)
2420 if (mips_clear_breakpoint (addr, len, type))
2426 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2430 mips_stopped_by_watchpoint (void)
2432 return hit_watchpoint;
2436 /* Insert a breakpoint. */
2439 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2441 return mips_common_breakpoint (1, addr, len, type);
2445 /* Clear a breakpoint. */
2448 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2450 return mips_common_breakpoint (0, addr, len, type);
2454 /* Check the error code from the return packet for an LSI breakpoint
2455 command. If there's no error, just return 0. If it's a warning,
2456 print the warning text and return 0. If it's an error, print
2457 the error text and return 1. <ADDR> is the address of the breakpoint
2458 that was being set. <RERRFLG> is the error code returned by PMON.
2459 This is a helper function for mips_common_breakpoint. */
2462 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2464 struct lsi_error *err;
2465 const char *saddr = paddress (target_gdbarch, addr);
2467 if (rerrflg == 0) /* no error */
2470 /* Warnings can be ORed together, so check them all. */
2471 if (rerrflg & W_WARN)
2473 if (monitor_warnings)
2477 for (err = lsi_warning_table; err->code != 0; err++)
2479 if ((err->code & rerrflg) == err->code)
2482 fprintf_unfiltered (gdb_stderr, "\
2483 mips_common_breakpoint (%s): Warning: %s\n",
2489 fprintf_unfiltered (gdb_stderr, "\
2490 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2497 /* Errors are unique, i.e. can't be ORed together. */
2498 for (err = lsi_error_table; err->code != 0; err++)
2500 if ((err->code & rerrflg) == err->code)
2502 fprintf_unfiltered (gdb_stderr, "\
2503 mips_common_breakpoint (%s): Error: %s\n",
2509 fprintf_unfiltered (gdb_stderr, "\
2510 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2517 /* This routine sends a breakpoint command to the remote target.
2519 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2520 <ADDR> is the address of the breakpoint.
2521 <LEN> the length of the region to break on.
2522 <TYPE> is the type of breakpoint:
2523 0 = write (BREAK_WRITE)
2524 1 = read (BREAK_READ)
2525 2 = read/write (BREAK_ACCESS)
2526 3 = instruction fetch (BREAK_FETCH)
2528 Return 0 if successful; otherwise 1. */
2531 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2533 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
2534 char buf[DATA_MAXLEN + 1];
2536 int rpid, rerrflg, rresponse, rlen;
2539 addr = gdbarch_addr_bits_remove (target_gdbarch, addr);
2541 if (mips_monitor == MON_LSI)
2543 if (set == 0) /* clear breakpoint */
2545 /* The LSI PMON "clear breakpoint" has this form:
2546 <pid> 'b' <bptn> 0x0
2548 <pid> 'b' 0x0 <code>
2550 <bptn> is a breakpoint number returned by an earlier 'B' command.
2551 Possible return codes: OK, E_BPT. */
2555 /* Search for the breakpoint in the table. */
2556 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2557 if (lsi_breakpoints[i].type == type
2558 && lsi_breakpoints[i].addr == addr
2559 && lsi_breakpoints[i].len == len)
2562 /* Clear the table entry and tell PMON to clear the breakpoint. */
2563 if (i == MAX_LSI_BREAKPOINTS)
2566 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n",
2567 paddress (target_gdbarch, addr));
2571 lsi_breakpoints[i].type = BREAK_UNUSED;
2572 sprintf (buf, "0x0 b 0x%x 0x0", i);
2573 mips_send_packet (buf, 1);
2575 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2578 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2581 mips_common_breakpoint: Bad response from remote board: %s",
2584 return (mips_check_lsi_error (addr, rerrflg));
2587 /* set a breakpoint */
2589 /* The LSI PMON "set breakpoint" command has this form:
2590 <pid> 'B' <addr> 0x0
2592 <pid> 'B' <bptn> <code>
2594 The "set data breakpoint" command has this form:
2596 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2598 where: type= "0x1" = read
2600 "0x3" = access (read or write)
2602 The reply returns two values:
2603 bptn - a breakpoint number, which is a small integer with
2604 possible values of zero through 255.
2605 code - an error return code, a value of zero indicates a
2606 succesful completion, other values indicate various
2607 errors and warnings.
2609 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON.
2613 if (type == BREAK_FETCH) /* instruction breakpoint */
2616 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2622 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2623 phex_nz (addr, addr_size),
2624 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2625 phex_nz (addr + len - 1, addr_size));
2627 mips_send_packet (buf, 1);
2629 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2632 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2633 &rpid, &rcmd, &rresponse, &rerrflg);
2634 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2636 mips_common_breakpoint: Bad response from remote board: %s",
2640 if (mips_check_lsi_error (addr, rerrflg))
2643 /* rresponse contains PMON's breakpoint number. Record the
2644 information for this breakpoint so we can clear it later. */
2645 lsi_breakpoints[rresponse].type = type;
2646 lsi_breakpoints[rresponse].addr = addr;
2647 lsi_breakpoints[rresponse].len = len;
2654 /* On non-LSI targets, the breakpoint command has this form:
2655 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2656 <MASK> is a don't care mask for addresses.
2657 <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch.
2661 mask = calculate_mask (addr, len);
2664 if (set) /* set a breakpoint */
2670 case BREAK_WRITE: /* write */
2673 case BREAK_READ: /* read */
2676 case BREAK_ACCESS: /* read/write */
2679 case BREAK_FETCH: /* fetch */
2683 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
2687 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2688 phex_nz (mask, addr_size), flags);
2693 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2696 mips_send_packet (buf, 1);
2698 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2701 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2702 &rpid, &rcmd, &rerrflg, &rresponse);
2704 if (nfields != 4 || rcmd != cmd)
2706 mips_common_breakpoint: Bad response from remote board: %s",
2711 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2712 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2713 if (mips_monitor == MON_DDB)
2714 rresponse = rerrflg;
2715 if (rresponse != 22) /* invalid argument */
2716 fprintf_unfiltered (gdb_stderr, "\
2717 mips_common_breakpoint (%s): Got error: 0x%x\n",
2718 paddress (target_gdbarch, addr), rresponse);
2725 /* Send one S record as specified by SREC of length LEN, starting
2726 at ADDR. Note, however, that ADDR is not used except to provide
2727 a useful message to the user in the event that a NACK is received
2731 send_srec (char *srec, int len, CORE_ADDR addr)
2737 serial_write (mips_desc, srec, len);
2739 ch = mips_readchar (remote_timeout);
2743 case SERIAL_TIMEOUT:
2744 error ("Timeout during download.");
2748 case 0x15: /* NACK */
2749 fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n",
2750 paddress (target_gdbarch, addr));
2753 error ("Download got unexpected ack char: 0x%x, retrying.\n", ch);
2758 /* Download a binary file by converting it to S records. */
2761 mips_load_srec (char *args)
2765 char *buffer, srec[1024];
2767 unsigned int srec_frame = 200;
2769 static int hashmark = 1;
2771 buffer = alloca (srec_frame * 2 + 256);
2773 abfd = bfd_openr (args, 0);
2776 printf_filtered ("Unable to open file %s\n", args);
2780 if (bfd_check_format (abfd, bfd_object) == 0)
2782 printf_filtered ("File is not an object file\n");
2786 /* This actually causes a download in the IDT binary format: */
2787 mips_send_command (LOAD_CMD, 0);
2789 for (s = abfd->sections; s; s = s->next)
2791 if (s->flags & SEC_LOAD)
2793 unsigned int numbytes;
2795 /* FIXME! vma too small????? */
2796 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2798 (long) (s->vma + bfd_get_section_size (s)));
2799 gdb_flush (gdb_stdout);
2801 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2803 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2805 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2807 reclen = mips_make_srec (srec, '3', s->vma + i,
2809 send_srec (srec, reclen, s->vma + i);
2811 if (deprecated_ui_load_progress_hook)
2812 deprecated_ui_load_progress_hook (s->name, i);
2816 putchar_unfiltered ('#');
2817 gdb_flush (gdb_stdout);
2820 } /* Per-packet (or S-record) loop */
2822 putchar_unfiltered ('\n');
2823 } /* Loadable sections */
2826 putchar_unfiltered ('\n');
2828 /* Write a type 7 terminator record. no data for a type 7, and there
2829 is no data, so len is 0. */
2831 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2833 send_srec (srec, reclen, abfd->start_address);
2835 serial_flush_input (mips_desc);
2839 * mips_make_srec -- make an srecord. This writes each line, one at a
2840 * time, each with it's own header and trailer line.
2841 * An srecord looks like this:
2843 * byte count-+ address
2844 * start ---+ | | data +- checksum
2846 * S01000006F6B692D746573742E73726563E4
2847 * S315000448600000000000000000FC00005900000000E9
2848 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2849 * S30B0004485A0000000000004E
2852 * S<type><length><address><data><checksum>
2856 * is the number of bytes following upto the checksum. Note that
2857 * this is not the number of chars following, since it takes two
2858 * chars to represent a byte.
2862 * 1) two byte address data record
2863 * 2) three byte address data record
2864 * 3) four byte address data record
2865 * 7) four byte address termination record
2866 * 8) three byte address termination record
2867 * 9) two byte address termination record
2870 * is the start address of the data following, or in the case of
2871 * a termination record, the start address of the image
2875 * is the sum of all the raw byte data in the record, from the length
2876 * upwards, modulo 256 and subtracted from 255.
2878 * This routine returns the length of the S-record.
2883 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2886 unsigned char checksum;
2889 /* Create the header for the srec. addr_size is the number of bytes in the address,
2890 and 1 is the number of bytes in the count. */
2892 /* FIXME!! bigger buf required for 64-bit! */
2895 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2896 /* This assumes S3 style downloads (4byte addresses). There should
2897 probably be a check, or the code changed to make it more
2899 buf[3] = memaddr >> 24;
2900 buf[4] = memaddr >> 16;
2901 buf[5] = memaddr >> 8;
2903 memcpy (&buf[7], myaddr, len);
2905 /* Note that the checksum is calculated on the raw data, not the
2906 hexified data. It includes the length, address and the data
2907 portions of the packet. */
2909 buf += 2; /* Point at length byte */
2910 for (i = 0; i < len + 4 + 1; i++)
2918 /* The following manifest controls whether we enable the simple flow
2919 control support provided by the monitor. If enabled the code will
2920 wait for an affirmative ACK between transmitting packets. */
2921 #define DOETXACK (1)
2923 /* The PMON fast-download uses an encoded packet format constructed of
2924 3byte data packets (encoded as 4 printable ASCII characters), and
2925 escape sequences (preceded by a '/'):
2928 'C' compare checksum (12bit value, not included in checksum calculation)
2929 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary
2930 'Z' zero fill multiple of 3bytes
2931 'B' byte (12bit encoded value, of 8bit data)
2932 'A' address (36bit encoded value)
2933 'E' define entry as original address, and exit load
2935 The packets are processed in 4 character chunks, so the escape
2936 sequences that do not have any data (or variable length data)
2937 should be padded to a 4 character boundary. The decoder will give
2938 an error if the complete message block size is not a multiple of
2939 4bytes (size of record).
2941 The encoding of numbers is done in 6bit fields. The 6bit value is
2942 used to index into this string to get the specific character
2943 encoding for the value: */
2944 static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2946 /* Convert the number of bits required into an encoded number, 6bits
2947 at a time (range 0..63). Keep a checksum if required (passed
2948 pointer non-NULL). The function returns the number of encoded
2949 characters written into the buffer. */
2952 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2954 int count = (n / 6);
2958 fprintf_unfiltered (gdb_stderr,
2959 "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s");
2964 fprintf_unfiltered (gdb_stderr,
2965 "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n);
2969 /* Deal with the checksum: */
2975 *chksum += ((v >> 24) & 0xFFF);
2977 *chksum += ((v >> 12) & 0xFFF);
2979 *chksum += ((v >> 0) & 0xFFF);
2986 *p++ = encoding[(v >> n) & 0x3F];
2993 /* Shorthand function (that could be in-lined) to output the zero-fill
2994 escape sequence into the data stream. */
2997 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
3001 sprintf (*buff, "/Z");
3002 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3003 *buff += (count + 2);
3005 return (recsize + count + 2);
3008 /* Add the checksum specified by *VALUE to end of the record under
3009 construction. *BUF specifies the location at which to begin
3010 writing characters comprising the checksum information. RECSIZE
3011 specifies the size of the record constructed thus far. (A trailing
3012 NUL character may be present in the buffer holding the record, but
3013 the record size does not include this character.)
3015 Return the total size of the record after adding the checksum escape,
3016 the checksum itself, and the trailing newline.
3018 The checksum specified by *VALUE is zeroed out prior to returning.
3019 Additionally, *BUF is updated to refer to the location just beyond
3020 the record elements added by this call. */
3023 pmon_checkset (int recsize, char **buff, int *value)
3027 /* Add the checksum (without updating the value): */
3028 sprintf (*buff, "/C");
3029 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3030 *buff += (count + 2);
3031 sprintf (*buff, "\n");
3032 *buff += 2; /* include zero terminator */
3033 /* Forcing a checksum validation clears the sum: */
3035 return (recsize + count + 3);
3038 /* Amount of padding we leave after at the end of the output buffer,
3039 for the checksum and line termination characters: */
3040 #define CHECKSIZE (4 + 4 + 4 + 2)
3041 /* zero-fill, checksum, transfer end and line termination space. */
3043 /* The amount of binary data loaded from the object file in a single
3045 #define BINCHUNK (1024)
3047 /* Maximum line of data accepted by the monitor: */
3048 #define MAXRECSIZE (550)
3049 /* NOTE: This constant depends on the monitor being used. This value
3050 is for PMON 5.x on the Cogent Vr4300 board. */
3052 /* Create a FastLoad format record.
3054 *OUTBUF is the buffer into which a FastLoad formatted record is
3055 written. On return, the pointer position represented by *OUTBUF
3056 is updated to point at the end of the data, i.e. the next position
3057 in the buffer that may be written. No attempt is made to NUL-
3058 terminate this portion of the record written to the buffer.
3060 INBUF contains the binary input data from which the FastLoad
3061 formatted record will be built. *INPTR is an index into this
3062 buffer. *INPTR is updated as the input is consumed. Thus, on
3063 return, the caller has access to the position of the next input
3064 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3067 *RECSIZE will be written with the size of the record written to the
3068 output buffer prior to returning. This size does not include a
3069 NUL-termination byte as none is written to the output buffer.
3071 *CSUM is the output buffer checksum. It is updated as data is
3072 written to the output buffer.
3074 *ZEROFILL is the current number of 3-byte zero sequences that have
3075 been encountered. It is both an input and an output to this
3079 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3080 int inamount, int *recsize, unsigned int *csum,
3081 unsigned int *zerofill)
3086 /* This is a simple check to ensure that our data will fit within
3087 the maximum allowable record size. Each record output is 4bytes
3088 in length. We must allow space for a pending zero fill command,
3089 the record, and a checksum record. */
3090 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3092 /* Process the binary data: */
3093 if ((inamount - *inptr) < 3)
3096 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3098 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3100 *recsize += (2 + count);
3105 unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]);
3107 /* Simple check for zero data. TODO: A better check would be
3108 to check the last, and then the middle byte for being zero
3109 (if the first byte is not). We could then check for
3110 following runs of zeros, and if above a certain size it is
3111 worth the 4 or 8 character hit of the byte insertions used
3112 to pad to the start of the zeroes. NOTE: This also depends
3113 on the alignment at the end of the zero run. */
3114 if (value == 0x00000000)
3117 if (*zerofill == 0xFFF) /* 12bit counter */
3118 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3123 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3124 count = pmon_makeb64 (value, p, 24, csum);
3136 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3137 output the message specified by MESG. Return -1 for failure, 0
3141 pmon_check_ack (char *mesg)
3143 #if defined(DOETXACK)
3148 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3150 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3152 fprintf_unfiltered (gdb_stderr,
3153 "Failed to receive valid ACK for %s\n", mesg);
3154 return (-1); /* terminate the download */
3157 #endif /* DOETXACK */
3161 /* pmon_download - Send a sequence of characters to the PMON download port,
3162 which is either a serial port or a UDP socket. */
3165 pmon_start_download (void)
3169 /* Create the temporary download file. */
3170 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3171 perror_with_name (tftp_localname);
3175 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3176 mips_expect ("Downloading from ");
3177 mips_expect (udp_in_use ? "udp" : "tty0");
3178 mips_expect (", ^C to abort\r\n");
3182 /* Look for the string specified by STRING sent from the target board
3183 during a download operation. If the string in question is not
3184 seen, output an error message, remove the temporary file, if
3185 appropriate, and return 0. Otherwise, return 1 to indicate
3189 mips_expect_download (char *string)
3191 if (!mips_expect (string))
3193 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3195 remove (tftp_localname); /* Remove temporary file */
3202 /* Look for messages from the target board associated with the entry
3205 NOTE: This function doesn't indicate success or failure, so we
3206 have no way to determine whether or not the output from the board
3207 was correctly seen. However, given that other items are checked
3208 after this, it seems unlikely that those checks will pass if this
3209 check doesn't first (silently) pass. */
3212 pmon_check_entry_address (char *entry_address, int final)
3214 char hexnumber[9]; /* includes '\0' space */
3216 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3217 sprintf (hexnumber, "%x", final);
3218 mips_expect (hexnumber);
3219 mips_expect ("\r\n");
3222 /* Look for messages from the target board showing the total number of
3223 bytes downloaded to the board. Output 1 for success if the tail
3224 end of the message was read correctly, 0 otherwise. */
3227 pmon_check_total (int bintotal)
3229 char hexnumber[9]; /* includes '\0' space */
3231 mips_expect ("\r\ntotal = 0x");
3232 sprintf (hexnumber, "%x", bintotal);
3233 mips_expect (hexnumber);
3234 return mips_expect_download (" bytes\r\n");
3237 /* Look for the termination messages associated with the end of
3238 a download to the board.
3240 Also, when `tftp_in_use' is set, issue the load command to the
3241 board causing the file to be transferred. (This is done prior
3242 to looking for the above mentioned termination messages.) */
3245 pmon_end_download (int final, int bintotal)
3247 char hexnumber[9]; /* includes '\0' space */
3251 static char *load_cmd_prefix = "load -b -s ";
3255 /* Close off the temporary file containing the load data. */
3259 /* Make the temporary file readable by the world. */
3260 if (stat (tftp_localname, &stbuf) == 0)
3261 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3263 /* Must reinitialize the board to prevent PMON from crashing. */
3264 if (mips_monitor != MON_ROCKHOPPER)
3265 mips_send_command ("initEther\r", -1);
3267 /* Send the load command. */
3268 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3269 strcpy (cmd, load_cmd_prefix);
3270 strcat (cmd, tftp_name);
3272 mips_send_command (cmd, 0);
3274 if (!mips_expect_download ("Downloading from "))
3276 if (!mips_expect_download (tftp_name))
3278 if (!mips_expect_download (", ^C to abort\r\n"))
3282 /* Wait for the stuff that PMON prints after the load has completed.
3283 The timeout value for use in the tftp case (15 seconds) was picked
3284 arbitrarily but might be too small for really large downloads. FIXME. */
3285 switch (mips_monitor)
3288 pmon_check_ack ("termination");
3289 pmon_check_entry_address ("Entry address is ", final);
3290 if (!pmon_check_total (bintotal))
3293 case MON_ROCKHOPPER:
3294 if (!pmon_check_total (bintotal))
3296 pmon_check_entry_address ("Entry Address = ", final);
3299 pmon_check_entry_address ("Entry Address = ", final);
3300 pmon_check_ack ("termination");
3301 if (!pmon_check_total (bintotal))
3307 remove (tftp_localname); /* Remove temporary file */
3310 /* Write the buffer specified by BUFFER of length LENGTH to either
3311 the board or the temporary file that'll eventually be transferred
3315 pmon_download (char *buffer, int length)
3318 fwrite (buffer, 1, length, tftp_file);
3320 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3323 /* Open object or executable file, FILE, and send it to the board
3324 using the FastLoad format. */
3327 pmon_load_fast (char *file)
3331 unsigned char *binbuf;
3334 unsigned int csum = 0;
3335 int hashmark = !tftp_in_use;
3340 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3341 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3343 abfd = bfd_openr (file, 0);
3346 printf_filtered ("Unable to open file %s\n", file);
3350 if (bfd_check_format (abfd, bfd_object) == 0)
3352 printf_filtered ("File is not an object file\n");
3356 /* Setup the required download state: */
3357 mips_send_command ("set dlproto etxack\r", -1);
3358 mips_send_command ("set dlecho off\r", -1);
3359 /* NOTE: We get a "cannot set variable" message if the variable is
3360 already defined to have the argument we give. The code doesn't
3361 care, since it just scans to the next prompt anyway. */
3362 /* Start the download: */
3363 pmon_start_download ();
3365 /* Zero the checksum */
3366 sprintf (buffer, "/Kxx\n");
3367 reclen = strlen (buffer);
3368 pmon_download (buffer, reclen);
3369 finished = pmon_check_ack ("/Kxx");
3371 for (s = abfd->sections; s && !finished; s = s->next)
3372 if (s->flags & SEC_LOAD) /* only deal with loadable sections */
3374 bintotal += bfd_get_section_size (s);
3375 final = (s->vma + bfd_get_section_size (s));
3377 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma,
3378 (unsigned int) (s->vma + bfd_get_section_size (s)));
3379 gdb_flush (gdb_stdout);
3381 /* Output the starting address */
3382 sprintf (buffer, "/A");
3383 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3384 buffer[2 + reclen] = '\n';
3385 buffer[3 + reclen] = '\0';
3386 reclen += 3; /* for the initial escape code and carriage return */
3387 pmon_download (buffer, reclen);
3388 finished = pmon_check_ack ("/A");
3392 unsigned int binamount;
3393 unsigned int zerofill = 0;
3400 i < bfd_get_section_size (s) && !finished;
3405 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3407 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3409 /* This keeps a rolling checksum, until we decide to output
3411 for (; ((binamount - binptr) > 0);)
3413 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3414 &reclen, &csum, &zerofill);
3415 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3417 reclen = pmon_checkset (reclen, &bp, &csum);
3418 pmon_download (buffer, reclen);
3419 finished = pmon_check_ack ("data record");
3422 zerofill = 0; /* do not transmit pending zerofills */
3426 if (deprecated_ui_load_progress_hook)
3427 deprecated_ui_load_progress_hook (s->name, i);
3431 putchar_unfiltered ('#');
3432 gdb_flush (gdb_stdout);
3436 reclen = 0; /* buffer processed */
3441 /* Ensure no out-standing zerofill requests: */
3443 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3445 /* and then flush the line: */
3448 reclen = pmon_checkset (reclen, &bp, &csum);
3449 /* Currently pmon_checkset outputs the line terminator by
3450 default, so we write out the buffer so far: */
3451 pmon_download (buffer, reclen);
3452 finished = pmon_check_ack ("record remnant");
3456 putchar_unfiltered ('\n');
3459 /* Terminate the transfer. We know that we have an empty output
3460 buffer at this point. */
3461 sprintf (buffer, "/E/E\n"); /* include dummy padding characters */
3462 reclen = strlen (buffer);
3463 pmon_download (buffer, reclen);
3466 { /* Ignore the termination message: */
3467 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3470 { /* Deal with termination message: */
3471 pmon_end_download (final, bintotal);
3477 /* mips_load -- download a file. */
3480 mips_load (char *file, int from_tty)
3482 struct regcache *regcache;
3484 /* Get the board out of remote debugging mode. */
3485 if (mips_exit_debug ())
3486 error ("mips_load: Couldn't get into monitor mode.");
3488 if (mips_monitor != MON_IDT)
3489 pmon_load_fast (file);
3491 mips_load_srec (file);
3495 /* Finally, make the PC point at the start address */
3496 regcache = get_current_regcache ();
3497 if (mips_monitor != MON_IDT)
3499 /* Work around problem where PMON monitor updates the PC after a load
3500 to a different value than GDB thinks it has. The following ensures
3501 that the regcache_write_pc() WILL update the PC value: */
3502 regcache_invalidate (regcache,
3503 mips_regnum (get_regcache_arch (regcache))->pc);
3506 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3509 /* Check to see if a thread is still alive. */
3512 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3514 if (ptid_equal (ptid, remote_mips_ptid))
3515 /* The monitor's task is always alive. */
3521 /* Convert a thread ID to a string. Returns the string in a static
3525 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3527 static char buf[64];
3529 if (ptid_equal (ptid, remote_mips_ptid))
3531 xsnprintf (buf, sizeof buf, "Thread <main>");
3535 return normal_pid_to_str (ptid);
3538 /* Pass the command argument as a packet to PMON verbatim. */
3541 pmon_command (char *args, int from_tty)
3543 char buf[DATA_MAXLEN + 1];
3546 sprintf (buf, "0x0 %s", args);
3547 mips_send_packet (buf, 1);
3548 printf_filtered ("Send packet: %s\n", buf);
3550 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3552 printf_filtered ("Received packet: %s\n", buf);
3555 extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */
3557 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3558 Create target specific commands and perform other initializations
3559 specific to this file. */
3562 _initialize_remote_mips (void)
3564 /* Initialize the fields in mips_ops that are common to all four targets. */
3565 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3566 mips_ops.to_close = mips_close;
3567 mips_ops.to_detach = mips_detach;
3568 mips_ops.to_resume = mips_resume;
3569 mips_ops.to_fetch_registers = mips_fetch_registers;
3570 mips_ops.to_store_registers = mips_store_registers;
3571 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3572 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3573 mips_ops.to_files_info = mips_files_info;
3574 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3575 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3576 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3577 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3578 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3579 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3580 mips_ops.to_kill = mips_kill;
3581 mips_ops.to_load = mips_load;
3582 mips_ops.to_create_inferior = mips_create_inferior;
3583 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3584 mips_ops.to_thread_alive = mips_thread_alive;
3585 mips_ops.to_pid_to_str = mips_pid_to_str;
3586 mips_ops.to_log_command = serial_log_command;
3587 mips_ops.to_stratum = process_stratum;
3588 mips_ops.to_has_all_memory = default_child_has_all_memory;
3589 mips_ops.to_has_memory = default_child_has_memory;
3590 mips_ops.to_has_stack = default_child_has_stack;
3591 mips_ops.to_has_registers = default_child_has_registers;
3592 mips_ops.to_has_execution = default_child_has_execution;
3593 mips_ops.to_magic = OPS_MAGIC;
3595 /* Copy the common fields to all four target vectors. */
3596 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3598 /* Initialize target-specific fields in the target vectors. */
3599 mips_ops.to_shortname = "mips";
3600 mips_ops.to_doc = "\
3601 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3602 The argument is the device it is connected to or, if it contains a colon,\n\
3603 HOST:PORT to access a board over a network";
3604 mips_ops.to_open = mips_open;
3605 mips_ops.to_wait = mips_wait;
3607 pmon_ops.to_shortname = "pmon";
3608 pmon_ops.to_doc = "\
3609 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3610 line. The argument is the device it is connected to or, if it contains a\n\
3611 colon, HOST:PORT to access a board over a network";
3612 pmon_ops.to_open = pmon_open;
3613 pmon_ops.to_wait = mips_wait;
3615 ddb_ops.to_shortname = "ddb";
3617 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3618 line. The first argument is the device it is connected to or, if it contains\n\
3619 a colon, HOST:PORT to access a board over a network. The optional second\n\
3620 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3621 TFTP downloads to the board. The optional third parameter is the local name\n\
3622 of the TFTP temporary file, if it differs from the filename seen by the board.";
3623 ddb_ops.to_open = ddb_open;
3624 ddb_ops.to_wait = mips_wait;
3626 rockhopper_ops.to_shortname = "rockhopper";
3627 rockhopper_ops.to_doc = ddb_ops.to_doc;
3628 rockhopper_ops.to_open = rockhopper_open;
3629 rockhopper_ops.to_wait = mips_wait;
3631 lsi_ops.to_shortname = "lsi";
3632 lsi_ops.to_doc = pmon_ops.to_doc;
3633 lsi_ops.to_open = lsi_open;
3634 lsi_ops.to_wait = mips_wait;
3636 /* Add the targets. */
3637 add_target (&mips_ops);
3638 add_target (&pmon_ops);
3639 add_target (&ddb_ops);
3640 add_target (&lsi_ops);
3641 add_target (&rockhopper_ops);
3643 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3644 Set timeout in seconds for remote MIPS serial I/O."), _("\
3645 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3647 NULL, /* FIXME: i18n: */
3648 &setlist, &showlist);
3650 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3651 &mips_retransmit_wait, _("\
3652 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3653 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3654 This is the number of seconds to wait for an acknowledgement to a packet\n\
3655 before resending the packet."),
3657 NULL, /* FIXME: i18n: */
3658 &setlist, &showlist);
3660 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3661 &mips_syn_garbage, _("\
3662 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3663 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3664 This is the maximum number of characters GDB will ignore when trying to\n\
3665 synchronize with the remote system. A value of -1 means that there is no\n\
3666 limit. (Note that these characters are printed out even though they are\n\
3669 NULL, /* FIXME: i18n: */
3670 &setlist, &showlist);
3672 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3673 &mips_monitor_prompt, _("\
3674 Set the prompt that GDB expects from the monitor."), _("\
3675 Show the prompt that GDB expects from the monitor."), NULL,
3677 NULL, /* FIXME: i18n: */
3678 &setlist, &showlist);
3680 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3681 &monitor_warnings, _("\
3682 Set printing of monitor warnings."), _("\
3683 Show printing of monitor warnings."), _("\
3684 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3686 NULL, /* FIXME: i18n: */
3687 &setlist, &showlist);
3689 add_com ("pmon", class_obscure, pmon_command,
3690 _("Send a packet to PMON (must be in debug mode)."));
3692 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3693 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3694 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3695 Use \"on\" to enable the masking and \"off\" to disable it."),
3697 NULL, /* FIXME: i18n: */
3698 &setlist, &showlist);
3699 remote_mips_ptid = ptid_build (42000, 0, 42000);