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"
36 #include "gdb_usleep.h"
39 #include "mips-tdep.h"
40 #include "gdbthread.h"
43 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
44 types passed by breakpoint.c to target_insert_watchpoint.
45 Value 3 is our own invention, and is used for ordinary instruction
46 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
56 /* Prototypes for local functions. */
58 static int mips_readchar (int timeout);
60 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
63 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
64 int *pch, int timeout);
66 static int mips_cksum (const unsigned char *hdr,
67 const unsigned char *data, int len);
69 static void mips_send_packet (const char *s, int get_ack);
71 static void mips_send_command (const char *cmd, int prompt);
73 static int mips_receive_packet (char *buff, int throw_error, int timeout);
75 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
76 int *perr, int timeout, char *buff);
78 static void mips_initialize (void);
80 static void mips_open (char *name, int from_tty);
82 static void pmon_open (char *name, int from_tty);
84 static void ddb_open (char *name, int from_tty);
86 static void lsi_open (char *name, int from_tty);
88 static void mips_close (int quitting);
90 static void mips_detach (struct target_ops *ops, char *args, int from_tty);
92 static int mips_map_regno (struct gdbarch *, int);
94 static void mips_set_register (int regno, ULONGEST value);
96 static void mips_prepare_to_store (struct regcache *regcache);
98 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
100 static int mips_store_word (CORE_ADDR addr, unsigned int value,
103 static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
105 struct mem_attrib *attrib,
106 struct target_ops *target);
108 static void mips_files_info (struct target_ops *ignore);
110 static void mips_mourn_inferior (struct target_ops *ops);
112 static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum);
114 static int pmon_zeroset (int recsize, char **buff, int *amount,
115 unsigned int *chksum);
117 static int pmon_checkset (int recsize, char **buff, int *value);
119 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
120 int *inptr, int inamount, int *recsize,
121 unsigned int *csum, unsigned int *zerofill);
123 static int pmon_check_ack (char *mesg);
125 static void pmon_start_download (void);
127 static void pmon_end_download (int final, int bintotal);
129 static void pmon_download (char *buffer, int length);
131 static void pmon_load_fast (char *file);
133 static void mips_load (char *file, int from_tty);
135 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
136 unsigned char *myaddr, int len);
138 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
140 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
141 enum break_type type);
143 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
144 enum break_type type);
146 /* Forward declarations. */
147 extern struct target_ops mips_ops;
148 extern struct target_ops pmon_ops;
149 extern struct target_ops ddb_ops;
150 extern struct target_ops rockhopper_ops;
152 /* The MIPS remote debugging interface is built on top of a simple
153 packet protocol. Each packet is organized as follows:
155 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
156 may not appear anywhere else in the packet. Any time a SYN is
157 seen, a new packet should be assumed to have begun.
160 This byte contains the upper five bits of the logical length
161 of the data section, plus a single bit indicating whether this
162 is a data packet or an acknowledgement. The documentation
163 indicates that this bit is 1 for a data packet, but the actual
164 board uses 1 for an acknowledgement. The value of the byte is
165 0x40 + (ack ? 0x20 : 0) + (len >> 6)
166 (we always have 0 <= len < 1024). Acknowledgement packets do
167 not carry data, and must have a data length of 0.
169 LEN1 This byte contains the lower six bits of the logical length of
170 the data section. The value is
173 SEQ This byte contains the six bit sequence number of the packet.
176 An acknowlegment packet contains the sequence number of the
177 packet being acknowledged plus 1 modulo 64. Data packets are
178 transmitted in sequence. There may only be one outstanding
179 unacknowledged data packet at a time. The sequence numbers
180 are independent in each direction. If an acknowledgement for
181 the previous packet is received (i.e., an acknowledgement with
182 the sequence number of the packet just sent) the packet just
183 sent should be retransmitted. If no acknowledgement is
184 received within a timeout period, the packet should be
185 retransmitted. This has an unfortunate failure condition on a
186 high-latency line, as a delayed acknowledgement may lead to an
187 endless series of duplicate packets.
189 DATA The actual data bytes follow. The following characters are
190 escaped inline with DLE (ASCII 020, or ^P):
196 The additional DLE characters are not counted in the logical
197 length stored in the TYPE_LEN and LEN1 bytes.
202 These bytes contain an 18 bit checksum of the complete
203 contents of the packet excluding the SEQ byte and the
204 CSUM[123] bytes. The checksum is simply the twos complement
205 addition of all the bytes treated as unsigned characters. The
206 values of the checksum bytes are:
207 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
208 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
209 CSUM3: 0x40 + (cksum & 0x3f)
211 It happens that the MIPS remote debugging protocol always
212 communicates with ASCII strings. Because of this, this
213 implementation doesn't bother to handle the DLE quoting mechanism,
214 since it will never be required. */
218 /* The SYN character which starts each packet. */
221 /* The 0x40 used to offset each packet (this value ensures that all of
222 the header and trailer bytes, other than SYN, are printable ASCII
224 #define HDR_OFFSET 0x40
226 /* The indices of the bytes in the packet header. */
227 #define HDR_INDX_SYN 0
228 #define HDR_INDX_TYPE_LEN 1
229 #define HDR_INDX_LEN1 2
230 #define HDR_INDX_SEQ 3
233 /* The data/ack bit in the TYPE_LEN header byte. */
234 #define TYPE_LEN_DA_BIT 0x20
235 #define TYPE_LEN_DATA 0
236 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
238 /* How to compute the header bytes. */
239 #define HDR_SET_SYN(data, len, seq) (SYN)
240 #define HDR_SET_TYPE_LEN(data, len, seq) \
242 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
243 + (((len) >> 6) & 0x1f))
244 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
245 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
247 /* Check that a header byte is reasonable. */
248 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
250 /* Get data from the header. These macros evaluate their argument
252 #define HDR_IS_DATA(hdr) \
253 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
254 #define HDR_GET_LEN(hdr) \
255 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
256 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
258 /* The maximum data length. */
259 #define DATA_MAXLEN 1023
261 /* The trailer offset. */
262 #define TRLR_OFFSET HDR_OFFSET
264 /* The indices of the bytes in the packet trailer. */
265 #define TRLR_INDX_CSUM1 0
266 #define TRLR_INDX_CSUM2 1
267 #define TRLR_INDX_CSUM3 2
268 #define TRLR_LENGTH 3
270 /* How to compute the trailer bytes. */
271 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
272 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
273 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
275 /* Check that a trailer byte is reasonable. */
276 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
278 /* Get data from the trailer. This evaluates its argument multiple
280 #define TRLR_GET_CKSUM(trlr) \
281 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
282 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
283 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
285 /* The sequence number modulos. */
286 #define SEQ_MODULOS (64)
288 /* PMON commands to load from the serial port or UDP socket. */
289 #define LOAD_CMD "load -b -s tty0\r"
290 #define LOAD_CMD_UDP "load -b -s udp\r"
292 /* The target vectors for the four different remote MIPS targets.
293 These are initialized with code in _initialize_remote_mips instead
294 of static initializers, to make it easier to extend the target_ops
296 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
298 enum mips_monitor_type
300 /* IDT/SIM monitor being used: */
302 /* PMON monitor being used: */
303 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET]
304 Algorithmics Ltd. Nov 9 1995 17:19:50 */
305 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET]
306 Risq Modular Systems,
307 Thu Jun 6 09:28:40 PDT 1996 */
308 MON_LSI, /* 4.3.12 [EB,FP],
309 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
311 /* Last and unused value, for sizing vectors, etc. */
314 static enum mips_monitor_type mips_monitor = MON_LAST;
316 /* The monitor prompt text. If the user sets the PMON prompt
317 to some new value, the GDB `set monitor-prompt' command must also
318 be used to inform GDB about the expected prompt. Otherwise, GDB
319 will not be able to connect to PMON in mips_initialize().
320 If the `set monitor-prompt' command is not used, the expected
321 default prompt will be set according the target:
328 static char *mips_monitor_prompt;
330 /* Set to 1 if the target is open. */
331 static int mips_is_open;
333 /* Currently active target description (if mips_is_open == 1). */
334 static struct target_ops *current_ops;
336 /* Set to 1 while the connection is being initialized. */
337 static int mips_initializing;
339 /* Set to 1 while the connection is being brought down. */
340 static int mips_exiting;
342 /* The next sequence number to send. */
343 static unsigned int mips_send_seq;
345 /* The next sequence number we expect to receive. */
346 static unsigned int mips_receive_seq;
348 /* The time to wait before retransmitting a packet, in seconds. */
349 static int mips_retransmit_wait = 3;
351 /* The number of times to try retransmitting a packet before giving up. */
352 static int mips_send_retries = 10;
354 /* The number of garbage characters to accept when looking for an
355 SYN for the next packet. */
356 static int mips_syn_garbage = 10;
358 /* The time to wait for a packet, in seconds. */
359 static int mips_receive_wait = 5;
361 /* Set if we have sent a packet to the board but have not yet received
363 static int mips_need_reply = 0;
365 /* Handle used to access serial I/O stream. */
366 static struct serial *mips_desc;
368 /* UDP handle used to download files to target. */
369 static struct serial *udp_desc;
370 static int udp_in_use;
372 /* TFTP filename used to download files to DDB board, in the form
374 static char *tftp_name; /* host:filename */
375 static char *tftp_localname; /* filename portion of above */
376 static int tftp_in_use;
377 static FILE *tftp_file;
379 /* Counts the number of times the user tried to interrupt the target (usually
381 static int interrupt_count;
383 /* If non-zero, means that the target is running. */
384 static int mips_wait_flag = 0;
386 /* If non-zero, monitor supports breakpoint commands. */
387 static int monitor_supports_breakpoints = 0;
389 /* Data cache header. */
391 #if 0 /* not used (yet?) */
392 static DCACHE *mips_dcache;
395 /* Non-zero means that we've just hit a read or write watchpoint. */
396 static int hit_watchpoint;
398 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
399 The table is indexed by a breakpoint number, which is an integer
400 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
402 #define MAX_LSI_BREAKPOINTS 256
403 struct lsi_breakpoint_info
405 enum break_type type; /* type of breakpoint */
406 CORE_ADDR addr; /* address of breakpoint */
407 int len; /* length of region being watched */
408 unsigned long value; /* value to watch */
410 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
412 /* Error/warning codes returned by LSI PMON for breakpoint commands.
413 Warning values may be ORed together; error values may not. */
414 #define W_WARN 0x100 /* This bit is set if the error code
416 #define W_MSK 0x101 /* warning: Range feature is supported
418 #define W_VAL 0x102 /* warning: Value check is not
419 supported in hardware */
420 #define W_QAL 0x104 /* warning: Requested qualifiers are
421 not supported in hardware */
423 #define E_ERR 0x200 /* This bit is set if the error code
425 #define E_BPT 0x200 /* error: No such breakpoint number */
426 #define E_RGE 0x201 /* error: Range is not supported */
427 #define E_QAL 0x202 /* error: The requested qualifiers can
429 #define E_OUT 0x203 /* error: Out of hardware resources */
430 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
434 int code; /* error code */
435 char *string; /* string associated with this code */
438 struct lsi_error lsi_warning_table[] =
440 {W_MSK, "Range feature is supported via mask"},
441 {W_VAL, "Value check is not supported in hardware"},
442 {W_QAL, "Requested qualifiers are not supported in hardware"},
446 struct lsi_error lsi_error_table[] =
448 {E_BPT, "No such breakpoint number"},
449 {E_RGE, "Range is not supported"},
450 {E_QAL, "The requested qualifiers can not be used"},
451 {E_OUT, "Out of hardware resources"},
452 {E_NON, "Hardware breakpoint not supported"},
456 /* Set to 1 with the 'set monitor-warnings' command to enable printing
457 of warnings returned by PMON when hardware breakpoints are used. */
458 static int monitor_warnings;
460 /* This is the ptid we use while we're connected to the remote. Its
461 value is arbitrary, as the remote-mips target doesn't have a notion of
462 processes or threads, but we need something non-null to place in
464 static ptid_t remote_mips_ptid;
466 /* Close any ports which might be open. Reset certain globals indicating
467 the state of those ports. */
473 serial_close (mips_desc);
477 serial_close (udp_desc);
483 /* Handle low-level error that we can't recover from. Note that just
484 error()ing out from target_wait or some such low-level place will cause
485 all hell to break loose--the rest of GDB will tend to get left in an
486 inconsistent state. */
488 static void ATTRIBUTE_NORETURN
489 mips_error (char *string,...)
493 va_start (args, string);
495 target_terminal_ours ();
496 wrap_here (""); /* Force out any buffered output. */
497 gdb_flush (gdb_stdout);
499 fputs_filtered (error_pre_print, gdb_stderr);
500 vfprintf_filtered (gdb_stderr, string, args);
501 fprintf_filtered (gdb_stderr, "\n");
503 gdb_flush (gdb_stderr);
505 /* Clean up in such a way that mips_close won't try to talk to the
506 board (it almost surely won't work since we weren't able to talk to
510 printf_unfiltered ("Ending remote MIPS debugging.\n");
511 if (!ptid_equal (inferior_ptid, null_ptid))
512 target_mourn_inferior ();
514 deprecated_throw_reason (RETURN_ERROR);
517 /* putc_readable - print a character, displaying non-printable chars in
518 ^x notation or in hex. */
521 fputc_readable (int ch, struct ui_file *file)
524 fputc_unfiltered ('\n', file);
526 fprintf_unfiltered (file, "\\r");
527 else if (ch < 0x20) /* ASCII control character */
528 fprintf_unfiltered (file, "^%c", ch + '@');
529 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
530 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
532 fputc_unfiltered (ch, file);
536 /* puts_readable - print a string, displaying non-printable chars in
537 ^x notation or in hex. */
540 fputs_readable (const char *string, struct ui_file *file)
544 while ((c = *string++) != '\0')
545 fputc_readable (c, file);
549 /* Read P as a hex value. Return true if every character made sense,
550 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
553 read_hex_value (const char *p, ULONGEST *result)
561 if (*p >= '0' && *p <= '9')
563 else if (*p >= 'A' && *p <= 'F')
564 retval |= *p - 'A' + 10;
565 else if (*p >= 'a' && *p <= 'f')
566 retval |= *p - 'a' + 10;
576 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
577 timed out. TIMEOUT specifies timeout value in seconds. */
580 mips_expect_timeout (const char *string, int timeout)
582 const char *p = string;
586 fprintf_unfiltered (gdb_stdlog, "Expected \"");
587 fputs_readable (string, gdb_stdlog);
588 fprintf_unfiltered (gdb_stdlog, "\", got \"");
596 /* Must use serial_readchar() here cuz mips_readchar would get
597 confused if we were waiting for the mips_monitor_prompt... */
599 c = serial_readchar (mips_desc, timeout);
601 if (c == SERIAL_TIMEOUT)
604 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
609 fputc_readable (c, gdb_stdlog);
617 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
630 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
631 timed out. The timeout value is hard-coded to 2 seconds. Use
632 mips_expect_timeout if a different timeout value is needed. */
635 mips_expect (const char *string)
637 return mips_expect_timeout (string, remote_timeout);
640 /* Read a character from the remote, aborting on error. Returns
641 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
642 returns). FIXME: If we see the string mips_monitor_prompt from the
643 board, then we are debugging on the main console port, and we have
644 somehow dropped out of remote debugging mode. In this case, we
645 automatically go back in to remote debugging mode. This is a hack,
646 put in because I can't find any way for a program running on the
647 remote board to terminate without also ending remote debugging
648 mode. I assume users won't have any trouble with this; for one
649 thing, the IDT documentation generally assumes that the remote
650 debugging port is not the console port. This is, however, very
651 convenient for DejaGnu when you only have one connected serial
655 mips_readchar (int timeout)
658 static int state = 0;
659 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
661 { /* FIXME this whole block is dead code! */
665 if (i == -1 && watchdog > 0)
669 if (state == mips_monitor_prompt_len)
671 ch = serial_readchar (mips_desc, timeout);
673 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */
675 target_mourn_inferior ();
676 error (_("Watchdog has expired. Target detached."));
679 if (ch == SERIAL_EOF)
680 mips_error (_("End of file from remote"));
681 if (ch == SERIAL_ERROR)
682 mips_error (_("Error reading from remote: %s"), safe_strerror (errno));
683 if (remote_debug > 1)
685 /* Don't use _filtered; we can't deal with a QUIT out of
686 target_wait, and I think this might be called from there. */
687 if (ch != SERIAL_TIMEOUT)
688 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
690 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
693 /* If we have seen mips_monitor_prompt and we either time out, or
694 we see a @ (which was echoed from a packet we sent), reset the
695 board as described above. The first character in a packet after
696 the SYN (which is not echoed) is always an @ unless the packet is
697 more than 64 characters long, which ours never are. */
698 if ((ch == SERIAL_TIMEOUT || ch == '@')
699 && state == mips_monitor_prompt_len
700 && !mips_initializing
703 if (remote_debug > 0)
704 /* Don't use _filtered; we can't deal with a QUIT out of
705 target_wait, and I think this might be called from there. */
706 fprintf_unfiltered (gdb_stdlog,
707 "Reinitializing MIPS debugging mode\n");
714 /* At this point, about the only thing we can do is abort the command
715 in progress and get back to command level as quickly as possible. */
717 error (_("Remote board reset, debug protocol re-initialized."));
720 if (ch == mips_monitor_prompt[state])
728 /* Get a packet header, putting the data in the supplied buffer.
729 PGARBAGE is a pointer to the number of garbage characters received
730 so far. CH is the last character received. Returns 0 for success,
731 or -1 for timeout. */
734 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
740 /* Wait for a SYN. mips_syn_garbage is intended to prevent
741 sitting here indefinitely if the board sends us one garbage
742 character per second. ch may already have a value from the
743 last time through the loop. */
746 ch = mips_readchar (timeout);
747 if (ch == SERIAL_TIMEOUT)
751 /* Printing the character here lets the user of gdb see
752 what the program is outputting, if the debugging is
753 being done on the console port. Don't use _filtered:
754 we can't deal with a QUIT out of target_wait and
755 buffered target output confuses the user. */
756 if (!mips_initializing || remote_debug > 0)
758 if (isprint (ch) || isspace (ch))
760 fputc_unfiltered (ch, gdb_stdtarg);
764 fputc_readable (ch, gdb_stdtarg);
766 gdb_flush (gdb_stdtarg);
769 /* Only count unprintable characters. */
770 if (! (isprint (ch) || isspace (ch)))
773 if (mips_syn_garbage > 0
774 && *pgarbage > mips_syn_garbage)
775 mips_error (_("Debug protocol failure: more "
776 "than %d characters before a sync."),
781 /* Get the packet header following the SYN. */
782 for (i = 1; i < HDR_LENGTH; i++)
784 ch = mips_readchar (timeout);
785 if (ch == SERIAL_TIMEOUT)
787 /* Make sure this is a header byte. */
788 if (ch == SYN || !HDR_CHECK (ch))
794 /* If we got the complete header, we can return. Otherwise we
795 loop around and keep looking for SYN. */
801 /* Get a packet header, putting the data in the supplied buffer.
802 PGARBAGE is a pointer to the number of garbage characters received
803 so far. The last character read is returned in *PCH. Returns 0
804 for success, -1 for timeout, -2 for error. */
807 mips_receive_trailer (unsigned char *trlr, int *pgarbage,
808 int *pch, int timeout)
813 for (i = 0; i < TRLR_LENGTH; i++)
815 ch = mips_readchar (timeout);
817 if (ch == SERIAL_TIMEOUT)
819 if (!TRLR_CHECK (ch))
826 /* Get the checksum of a packet. HDR points to the packet header.
827 DATA points to the packet data. LEN is the length of DATA. */
830 mips_cksum (const unsigned char *hdr, const unsigned char *data, int len)
832 const unsigned char *p;
838 /* The initial SYN is not included in the checksum. */
852 /* Send a packet containing the given ASCII string. */
855 mips_send_packet (const char *s, int get_ack)
857 /* unsigned */ int len;
858 unsigned char *packet;
863 if (len > DATA_MAXLEN)
864 mips_error (_("MIPS protocol data packet too long: %s"), s);
866 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
868 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
869 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
870 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
871 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
873 memcpy (packet + HDR_LENGTH, s, len);
875 cksum = mips_cksum (packet, packet + HDR_LENGTH, len);
876 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
877 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
878 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
880 /* Increment the sequence number. This will set mips_send_seq to
881 the sequence number we expect in the acknowledgement. */
882 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
884 /* We can only have one outstanding data packet, so we just wait for
885 the acknowledgement here. Keep retransmitting the packet until
886 we get one, or until we've tried too many times. */
887 for (try = 0; try < mips_send_retries; try++)
892 if (remote_debug > 0)
894 /* Don't use _filtered; we can't deal with a QUIT out of
895 target_wait, and I think this might be called from there. */
896 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
897 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
900 if (serial_write (mips_desc, packet,
901 HDR_LENGTH + len + TRLR_LENGTH) != 0)
902 mips_error (_("write to target failed: %s"), safe_strerror (errno));
911 unsigned char hdr[HDR_LENGTH + 1];
912 unsigned char trlr[TRLR_LENGTH + 1];
916 /* Get the packet header. If we time out, resend the data
918 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
924 /* If we get a data packet, assume it is a duplicate and
925 ignore it. FIXME: If the acknowledgement is lost, this
926 data packet may be the packet the remote sends after the
928 if (HDR_IS_DATA (hdr))
932 /* Ignore any errors raised whilst attempting to ignore
935 len = HDR_GET_LEN (hdr);
937 for (i = 0; i < len; i++)
941 rch = mips_readchar (remote_timeout);
947 if (rch == SERIAL_TIMEOUT)
949 /* Ignore the character. */
953 (void) mips_receive_trailer (trlr, &garbage, &ch,
956 /* We don't bother checking the checksum, or providing an
957 ACK to the packet. */
961 /* If the length is not 0, this is a garbled packet. */
962 if (HDR_GET_LEN (hdr) != 0)
965 /* Get the packet trailer. */
966 err = mips_receive_trailer (trlr, &garbage, &ch,
967 mips_retransmit_wait);
969 /* If we timed out, resend the data packet. */
973 /* If we got a bad character, reread the header. */
977 /* If the checksum does not match the trailer checksum, this
978 is a bad packet; ignore it. */
979 if (mips_cksum (hdr, (unsigned char *) NULL, 0)
980 != TRLR_GET_CKSUM (trlr))
983 if (remote_debug > 0)
985 hdr[HDR_LENGTH] = '\0';
986 trlr[TRLR_LENGTH] = '\0';
987 /* Don't use _filtered; we can't deal with a QUIT out of
988 target_wait, and I think this might be called from there. */
989 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
990 HDR_GET_SEQ (hdr), hdr + 1, trlr);
993 /* If this ack is for the current packet, we're done. */
994 seq = HDR_GET_SEQ (hdr);
995 if (seq == mips_send_seq)
998 /* If this ack is for the last packet, resend the current
1000 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1003 /* Otherwise this is a bad ack; ignore it. Increment the
1004 garbage count to ensure that we do not stay in this loop
1010 mips_error (_("Remote did not acknowledge packet"));
1013 /* Receive and acknowledge a packet, returning the data in BUFF (which
1014 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1015 implies that only the sender retransmits packets, so this code just
1016 waits silently for a packet. It returns the length of the received
1017 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1018 don't print an error message and return -1. */
1021 mips_receive_packet (char *buff, int throw_error, int timeout)
1026 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1033 unsigned char hdr[HDR_LENGTH];
1034 unsigned char trlr[TRLR_LENGTH];
1038 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1041 mips_error (_("Timed out waiting for remote packet"));
1048 /* An acknowledgement is probably a duplicate; ignore it. */
1049 if (!HDR_IS_DATA (hdr))
1051 len = HDR_GET_LEN (hdr);
1052 /* Check if the length is valid for an ACK, we may aswell
1053 try and read the remainder of the packet: */
1056 /* Ignore the error condition, since we are going to
1057 ignore the packet anyway. */
1058 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1060 /* Don't use _filtered; we can't deal with a QUIT out of
1061 target_wait, and I think this might be called from there. */
1062 if (remote_debug > 0)
1063 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1067 len = HDR_GET_LEN (hdr);
1068 for (i = 0; i < len; i++)
1072 rch = mips_readchar (timeout);
1078 if (rch == SERIAL_TIMEOUT)
1081 mips_error (_("Timed out waiting for remote packet"));
1090 /* Don't use _filtered; we can't deal with a QUIT out of
1091 target_wait, and I think this might be called from there. */
1092 if (remote_debug > 0)
1093 fprintf_unfiltered (gdb_stdlog,
1094 "Got new SYN after %d chars (wanted %d)\n",
1099 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1103 mips_error (_("Timed out waiting for packet"));
1109 /* Don't use _filtered; we can't deal with a QUIT out of
1110 target_wait, and I think this might be called from there. */
1111 if (remote_debug > 0)
1112 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1116 /* If this is the wrong sequence number, ignore it. */
1117 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1119 /* Don't use _filtered; we can't deal with a QUIT out of
1120 target_wait, and I think this might be called from there. */
1121 if (remote_debug > 0)
1122 fprintf_unfiltered (gdb_stdlog,
1123 "Ignoring sequence number %d (want %d)\n",
1124 HDR_GET_SEQ (hdr), mips_receive_seq);
1128 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1131 if (remote_debug > 0)
1132 /* Don't use _filtered; we can't deal with a QUIT out of
1133 target_wait, and I think this might be called from there. */
1134 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1135 mips_cksum (hdr, buff, len),
1136 TRLR_GET_CKSUM (trlr));
1138 /* The checksum failed. Send an acknowledgement for the
1139 previous packet to tell the remote to resend the packet. */
1140 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1141 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1142 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1143 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1145 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1147 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1148 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1149 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1151 if (remote_debug > 0)
1153 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1154 /* Don't use _filtered; we can't deal with a QUIT out of
1155 target_wait, and I think this might be called from there. */
1156 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1160 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1163 mips_error (_("write to target failed: %s"),
1164 safe_strerror (errno));
1170 if (remote_debug > 0)
1173 /* Don't use _filtered; we can't deal with a QUIT out of
1174 target_wait, and I think this might be called from there. */
1175 printf_unfiltered ("Got packet \"%s\"\n", buff);
1178 /* We got the packet. Send an acknowledgement. */
1179 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1181 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1182 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1183 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1184 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1186 cksum = mips_cksum (ack, (unsigned char *) NULL, 0);
1188 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1189 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1190 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1192 if (remote_debug > 0)
1194 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1195 /* Don't use _filtered; we can't deal with a QUIT out of
1196 target_wait, and I think this might be called from there. */
1197 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1201 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1204 mips_error (_("write to target failed: %s"), safe_strerror (errno));
1212 /* Optionally send a request to the remote system and optionally wait
1213 for the reply. This implements the remote debugging protocol,
1214 which is built on top of the packet protocol defined above. Each
1215 request has an ADDR argument and a DATA argument. The following
1216 requests are defined:
1218 \0 don't send a request; just wait for a reply
1219 i read word from instruction space at ADDR
1220 d read word from data space at ADDR
1221 I write DATA to instruction space at ADDR
1222 D write DATA to data space at ADDR
1223 r read register number ADDR
1224 R set register number ADDR to value DATA
1225 c continue execution (if ADDR != 1, set pc to ADDR)
1226 s single step (if ADDR != 1, set pc to ADDR)
1228 The read requests return the value requested. The write requests
1229 return the previous value in the changed location. The execution
1230 requests return a UNIX wait value (the approximate signal which
1231 caused execution to stop is in the upper eight bits).
1233 If PERR is not NULL, this function waits for a reply. If an error
1234 occurs, it sets *PERR to 1 and sets errno according to what the
1235 target board reports. */
1238 mips_request (int cmd,
1245 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
1246 char myBuff[DATA_MAXLEN + 1];
1247 char response_string[17];
1254 if (buff == (char *) NULL)
1259 if (mips_need_reply)
1260 internal_error (__FILE__, __LINE__,
1261 _("mips_request: Trying to send "
1262 "command before reply"));
1263 /* 'T' sets a register to a 64-bit value, so make sure we use
1264 the right conversion function. */
1266 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1267 phex_nz (addr, addr_size), phex_nz (data, 8));
1269 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1270 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1272 mips_send_packet (buff, 1);
1273 mips_need_reply = 1;
1276 if (perr == (int *) NULL)
1279 if (!mips_need_reply)
1280 internal_error (__FILE__, __LINE__,
1281 _("mips_request: Trying to get reply before command"));
1283 mips_need_reply = 0;
1285 len = mips_receive_packet (buff, 1, timeout);
1288 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1289 &rpid, &rcmd, &rerrflg, response_string) != 4
1290 || !read_hex_value (response_string, &rresponse)
1291 || (cmd != '\0' && rcmd != cmd))
1292 mips_error (_("Bad response from remote board"));
1298 /* FIXME: This will returns MIPS errno numbers, which may or may
1299 not be the same as errno values used on other systems. If
1300 they stick to common errno values, they will be the same, but
1301 if they don't, they must be translated. */
1311 /* Cleanup associated with mips_initialize(). */
1314 mips_initialize_cleanups (void *arg)
1316 mips_initializing = 0;
1319 /* Cleanup associated with mips_exit_debug(). */
1322 mips_exit_cleanups (void *arg)
1327 /* Send a command and wait for that command to be echoed back. Wait,
1328 too, for the following prompt. */
1331 mips_send_command (const char *cmd, int prompt)
1333 serial_write (mips_desc, cmd, strlen (cmd));
1337 mips_expect (mips_monitor_prompt);
1340 /* Enter remote (dbx) debug mode: */
1343 mips_enter_debug (void)
1345 /* Reset the sequence numbers, ready for the new debug sequence: */
1347 mips_receive_seq = 0;
1349 if (mips_monitor != MON_IDT)
1350 mips_send_command ("debug\r", 0);
1351 else /* Assume IDT monitor by default. */
1352 mips_send_command ("db tty0\r", 0);
1354 gdb_usleep (1000000);
1355 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1357 /* We don't need to absorb any spurious characters here, since the
1358 mips_receive_header will eat up a reasonable number of characters
1359 whilst looking for the SYN, however this avoids the "garbage"
1360 being displayed to the user. */
1361 if (mips_monitor != MON_IDT)
1365 char buff[DATA_MAXLEN + 1];
1367 if (mips_receive_packet (buff, 1, 3) < 0)
1368 mips_error (_("Failed to initialize (didn't receive packet)."));
1372 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1375 mips_exit_debug (void)
1378 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1382 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1384 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1385 so we do not get a reply to this command: */
1386 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1387 mips_need_reply = 0;
1388 if (!mips_expect (" break!"))
1392 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1394 if (!mips_expect (mips_monitor_prompt))
1397 do_cleanups (old_cleanups);
1402 /* Initialize a new connection to the MIPS board, and make sure we are
1403 really connected. */
1406 mips_initialize (void)
1409 struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1412 /* What is this code doing here? I don't see any way it can happen, and
1413 it might mean mips_initializing didn't get cleared properly.
1414 So I'll make it a warning. */
1416 if (mips_initializing)
1418 warning (_("internal error: mips_initialize called twice"));
1423 mips_initializing = 1;
1425 /* At this point, the packit protocol isn't responding. We'll try getting
1426 into the monitor, and restarting the protocol. */
1428 /* Force the system into the monitor. After this we *should* be at
1429 the mips_monitor_prompt. */
1430 if (mips_monitor != MON_IDT)
1431 j = 0; /* Start by checking if we are already
1434 j = 1; /* Start by sending a break. */
1439 case 0: /* First, try sending a CR. */
1440 serial_flush_input (mips_desc);
1441 serial_write (mips_desc, "\r", 1);
1443 case 1: /* First, try sending a break. */
1444 serial_send_break (mips_desc);
1446 case 2: /* Then, try a ^C. */
1447 serial_write (mips_desc, "\003", 1);
1449 case 3: /* Then, try escaping from download. */
1451 if (mips_monitor != MON_IDT)
1455 /* We shouldn't need to send multiple termination
1456 sequences, since the target performs line (or
1457 block) reads, and then processes those
1458 packets. In-case we were downloading a large packet
1459 we flush the output buffer before inserting a
1460 termination sequence. */
1461 serial_flush_output (mips_desc);
1462 sprintf (tbuff, "\r/E/E\r");
1463 serial_write (mips_desc, tbuff, 6);
1470 /* We are possibly in binary download mode, having
1471 aborted in the middle of an S-record. ^C won't
1472 work because of binary mode. The only reliable way
1473 out is to send enough termination packets (8 bytes)
1474 to fill up and then overflow the largest size
1475 S-record (255 bytes in this case). This amounts to
1476 256/8 + 1 packets. */
1478 mips_make_srec (srec, '7', 0, NULL, 0);
1480 for (i = 1; i <= 33; i++)
1482 serial_write (mips_desc, srec, 8);
1484 if (serial_readchar (mips_desc, 0) >= 0)
1485 break; /* Break immediatly if we get something from
1492 mips_error (_("Failed to initialize."));
1495 if (mips_expect (mips_monitor_prompt))
1499 if (mips_monitor != MON_IDT)
1501 /* Sometimes PMON ignores the first few characters in the first
1502 command sent after a load. Sending a blank command gets
1504 mips_send_command ("\r", -1);
1506 /* Ensure the correct target state: */
1507 if (mips_monitor != MON_LSI)
1508 mips_send_command ("set regsize 64\r", -1);
1509 mips_send_command ("set hostport tty0\r", -1);
1510 mips_send_command ("set brkcmd \"\"\r", -1);
1511 /* Delete all the current breakpoints: */
1512 mips_send_command ("db *\r", -1);
1513 /* NOTE: PMON does not have breakpoint support through the
1514 "debug" mode, only at the monitor command-line. */
1517 mips_enter_debug ();
1519 /* Clear all breakpoints: */
1520 if ((mips_monitor == MON_IDT
1521 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1522 || mips_monitor == MON_LSI)
1523 monitor_supports_breakpoints = 1;
1525 monitor_supports_breakpoints = 0;
1527 do_cleanups (old_cleanups);
1529 /* If this doesn't call error, we have connected; we don't care if
1530 the request itself succeeds or fails. */
1532 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1535 /* Open a connection to the remote board. */
1538 common_open (struct target_ops *ops, char *name, int from_tty,
1539 enum mips_monitor_type new_monitor,
1540 const char *new_monitor_prompt)
1543 char *serial_port_name;
1544 char *remote_name = 0;
1545 char *local_name = 0;
1550 To open a MIPS remote debugging connection, you need to specify what\n\
1551 serial device is attached to the target board (e.g., /dev/ttya).\n\
1552 If you want to use TFTP to download to the board, specify the name of a\n\
1553 temporary file to be used by GDB for downloads as the second argument.\n\
1554 This filename must be in the form host:filename, where host is the name\n\
1555 of the host running the TFTP server, and the file must be readable by the\n\
1556 world. If the local name of the temporary file differs from the name as\n\
1557 seen from the board via TFTP, specify that name as the third parameter.\n"));
1559 /* Parse the serial port name, the optional TFTP name, and the
1560 optional local TFTP name. */
1561 argv = gdb_buildargv (name);
1562 make_cleanup_freeargv (argv);
1564 serial_port_name = xstrdup (argv[0]);
1565 if (argv[1]) /* Remote TFTP name specified? */
1567 remote_name = argv[1];
1568 if (argv[2]) /* Local TFTP filename specified? */
1569 local_name = argv[2];
1572 target_preopen (from_tty);
1575 unpush_target (current_ops);
1577 /* Open and initialize the serial port. */
1578 mips_desc = serial_open (serial_port_name);
1579 if (mips_desc == NULL)
1580 perror_with_name (serial_port_name);
1582 if (baud_rate != -1)
1584 if (serial_setbaudrate (mips_desc, baud_rate))
1586 serial_close (mips_desc);
1587 perror_with_name (serial_port_name);
1591 serial_raw (mips_desc);
1593 /* Open and initialize the optional download port. If it is in the form
1594 hostname#portnumber, it's a UDP socket. If it is in the form
1595 hostname:filename, assume it's the TFTP filename that must be
1596 passed to the DDB board to tell it where to get the load file. */
1599 if (strchr (remote_name, '#'))
1601 udp_desc = serial_open (remote_name);
1603 perror_with_name (_("Unable to open UDP port"));
1608 /* Save the remote and local names of the TFTP temp file. If
1609 the user didn't specify a local name, assume it's the same
1610 as the part of the remote name after the "host:". */
1614 xfree (tftp_localname);
1615 if (local_name == NULL)
1616 if ((local_name = strchr (remote_name, ':')) != NULL)
1617 local_name++; /* Skip over the colon. */
1618 if (local_name == NULL)
1619 local_name = remote_name; /* Local name same as remote name. */
1620 tftp_name = xstrdup (remote_name);
1621 tftp_localname = xstrdup (local_name);
1629 /* Reset the expected monitor prompt if it's never been set before. */
1630 if (mips_monitor_prompt == NULL)
1631 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1632 mips_monitor = new_monitor;
1637 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1639 /* Switch to using remote target now. */
1642 inferior_ptid = remote_mips_ptid;
1643 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1644 add_thread_silent (inferior_ptid);
1646 /* Try to figure out the processor model if possible. */
1647 deprecated_mips_set_processor_regs_hack ();
1649 /* This is really the job of start_remote however, that makes an
1650 assumption that the target is about to print out a status message
1651 of some sort. That doesn't happen here (in fact, it may not be
1652 possible to get the monitor to send the appropriate packet). */
1654 reinit_frame_cache ();
1655 registers_changed ();
1656 stop_pc = regcache_read_pc (get_current_regcache ());
1657 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC);
1658 xfree (serial_port_name);
1661 /* Open a connection to an IDT board. */
1664 mips_open (char *name, int from_tty)
1666 const char *monitor_prompt = NULL;
1667 if (gdbarch_bfd_arch_info (target_gdbarch) != NULL
1668 && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips)
1670 switch (gdbarch_bfd_arch_info (target_gdbarch)->mach)
1672 case bfd_mach_mips4100:
1673 case bfd_mach_mips4300:
1674 case bfd_mach_mips4600:
1675 case bfd_mach_mips4650:
1676 case bfd_mach_mips5000:
1677 monitor_prompt = "<RISQ> ";
1681 if (monitor_prompt == NULL)
1682 monitor_prompt = "<IDT>";
1683 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1686 /* Open a connection to a PMON board. */
1689 pmon_open (char *name, int from_tty)
1691 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1694 /* Open a connection to a DDB board. */
1697 ddb_open (char *name, int from_tty)
1699 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1702 /* Open a connection to a rockhopper board. */
1705 rockhopper_open (char *name, int from_tty)
1707 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1710 /* Open a connection to an LSI board. */
1713 lsi_open (char *name, int from_tty)
1717 /* Clear the LSI breakpoint table. */
1718 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1719 lsi_breakpoints[i].type = BREAK_UNUSED;
1721 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1724 /* Close a connection to the remote board. */
1727 mips_close (int quitting)
1731 /* Get the board out of remote debugging mode. */
1732 (void) mips_exit_debug ();
1737 generic_mourn_inferior ();
1740 /* Detach from the remote board. */
1743 mips_detach (struct target_ops *ops, char *args, int from_tty)
1746 error (_("Argument given to \"detach\" when remotely debugging."));
1753 printf_unfiltered ("Ending remote MIPS debugging.\n");
1756 /* Tell the target board to resume. This does not wait for a reply
1757 from the board, except in the case of single-stepping on LSI boards,
1758 where PMON does return a reply. */
1761 mips_resume (struct target_ops *ops,
1762 ptid_t ptid, int step, enum target_signal siggnal)
1766 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1767 a single step, so we wait for that. */
1768 mips_request (step ? 's' : 'c', 1, siggnal,
1769 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1770 mips_receive_wait, NULL);
1773 /* Return the signal corresponding to SIG, where SIG is the number which
1774 the MIPS protocol uses for the signal. */
1776 static enum target_signal
1777 mips_signal_from_protocol (int sig)
1779 /* We allow a few more signals than the IDT board actually returns, on
1780 the theory that there is at least *some* hope that perhaps the numbering
1781 for these signals is widely agreed upon. */
1784 return TARGET_SIGNAL_UNKNOWN;
1786 /* Don't want to use target_signal_from_host because we are converting
1787 from MIPS signal numbers, not host ones. Our internal numbers
1788 match the MIPS numbers for the signals the board can return, which
1789 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1790 return (enum target_signal) sig;
1793 /* Set the register designated by REGNO to the value designated by VALUE. */
1796 mips_set_register (int regno, ULONGEST value)
1798 char buf[MAX_REGISTER_SIZE];
1799 struct regcache *regcache = get_current_regcache ();
1800 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1801 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1803 /* We got the number the register holds, but gdb expects to see a
1804 value in the target byte ordering. */
1806 if (mips_monitor != MON_ROCKHOPPER
1807 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1808 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1809 In such cases we can only really debug 32-bit code properly so,
1810 when reading a GPR or the PC, assume that the full 64-bit
1811 value is the sign extension of the lower 32 bits. */
1812 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1815 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1818 regcache_raw_supply (regcache, regno, buf);
1821 /* Wait until the remote stops, and return a wait status. */
1824 mips_wait (struct target_ops *ops,
1825 ptid_t ptid, struct target_waitstatus *status, int options)
1829 char buff[DATA_MAXLEN];
1830 ULONGEST rpc, rfp, rsp;
1831 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1835 interrupt_count = 0;
1838 /* If we have not sent a single step or continue command, then the
1839 board is waiting for us to do something. Return a status
1840 indicating that it is stopped. */
1841 if (!mips_need_reply)
1843 status->kind = TARGET_WAITKIND_STOPPED;
1844 status->value.sig = TARGET_SIGNAL_TRAP;
1845 return inferior_ptid;
1848 /* No timeout; we sit here as long as the program continues to execute. */
1850 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1853 mips_error (_("Remote failure: %s"), safe_strerror (errno));
1855 /* On returning from a continue, the PMON monitor seems to start
1856 echoing back the messages we send prior to sending back the
1857 ACK. The code can cope with this, but to try and avoid the
1858 unnecessary serial traffic, and "spurious" characters displayed
1859 to the user, we cheat and reset the debug protocol. The problems
1860 seems to be caused by a check on the number of arguments, and the
1861 command length, within the monitor causing it to echo the command
1863 if (mips_monitor == MON_PMON)
1866 mips_enter_debug ();
1869 /* See if we got back extended status. If so, pick out the pc, fp,
1872 nfields = sscanf (buff,
1873 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1874 pc_string, fp_string, sp_string, flags);
1876 && read_hex_value (pc_string, &rpc)
1877 && read_hex_value (fp_string, &rfp)
1878 && read_hex_value (sp_string, &rsp))
1880 struct regcache *regcache = get_current_regcache ();
1881 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1883 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1884 mips_set_register (30, rfp);
1885 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1891 for (i = 0; i <= 2; i++)
1892 if (flags[i] == 'r' || flags[i] == 'w')
1894 else if (flags[i] == '\000')
1899 if (strcmp (target_shortname, "lsi") == 0)
1902 /* If this is an LSI PMON target, see if we just hit a
1903 hardrdware watchpoint. Right now, PMON doesn't give us
1904 enough information to determine which breakpoint we hit. So
1905 we have to look up the PC in our own table of breakpoints,
1906 and if found, assume it's just a normal instruction fetch
1907 breakpoint, not a data watchpoint. FIXME when PMON provides
1908 some way to tell us what type of breakpoint it is. */
1910 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1913 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1915 if (lsi_breakpoints[i].addr == pc
1916 && lsi_breakpoints[i].type == BREAK_FETCH)
1923 /* If a data breakpoint was hit, PMON returns the following packet:
1925 The return packet from an ordinary breakpoint doesn't have the
1926 extra 0x01 field tacked onto the end. */
1927 if (nfields == 1 && rpc == 1)
1932 /* NOTE: The following (sig) numbers are defined by PMON:
1933 SPP_SIGTRAP 5 breakpoint
1941 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1942 and so on, because the constants we want here are determined by the
1943 MIPS protocol and have nothing to do with what host we are running on. */
1944 if ((rstatus & 0xff) == 0)
1946 status->kind = TARGET_WAITKIND_EXITED;
1947 status->value.integer = (((rstatus) >> 8) & 0xff);
1949 else if ((rstatus & 0xff) == 0x7f)
1951 status->kind = TARGET_WAITKIND_STOPPED;
1952 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1954 /* If the stop PC is in the _exit function, assume
1955 we hit the 'break 0x3ff' instruction in _exit, so this
1956 is not a normal breakpoint. */
1957 if (strcmp (target_shortname, "lsi") == 0)
1960 CORE_ADDR func_start;
1961 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1963 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1964 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1965 && func_start == pc)
1966 status->kind = TARGET_WAITKIND_EXITED;
1971 status->kind = TARGET_WAITKIND_SIGNALLED;
1972 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1975 return inferior_ptid;
1978 /* We have to map between the register numbers used by gdb and the
1979 register numbers used by the debugging protocol. */
1981 #define REGNO_OFFSET 96
1984 mips_map_regno (struct gdbarch *gdbarch, int regno)
1988 if (regno >= mips_regnum (gdbarch)->fp0
1989 && regno < mips_regnum (gdbarch)->fp0 + 32)
1990 return regno - mips_regnum (gdbarch)->fp0 + 32;
1991 else if (regno == mips_regnum (gdbarch)->pc)
1992 return REGNO_OFFSET + 0;
1993 else if (regno == mips_regnum (gdbarch)->cause)
1994 return REGNO_OFFSET + 1;
1995 else if (regno == mips_regnum (gdbarch)->hi)
1996 return REGNO_OFFSET + 2;
1997 else if (regno == mips_regnum (gdbarch)->lo)
1998 return REGNO_OFFSET + 3;
1999 else if (regno == mips_regnum (gdbarch)->fp_control_status)
2000 return REGNO_OFFSET + 4;
2001 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
2002 return REGNO_OFFSET + 5;
2004 /* FIXME: Is there a way to get the status register? */
2008 /* Fetch the remote registers. */
2011 mips_fetch_registers (struct target_ops *ops,
2012 struct regcache *regcache, int regno)
2014 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2015 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2021 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2022 mips_fetch_registers (ops, regcache, regno);
2026 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2027 || regno == MIPS_ZERO_REGNUM)
2028 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2029 supposed to read zero (see also mips-nat.c). */
2033 /* If PMON doesn't support this register, don't waste serial
2034 bandwidth trying to read it. */
2035 int pmon_reg = mips_map_regno (gdbarch, regno);
2037 if (regno != 0 && pmon_reg == 0)
2041 /* Unfortunately the PMON version in the Vr4300 board has been
2042 compiled without the 64bit register access commands. This
2043 means we cannot get hold of the full register width. */
2044 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2045 val = mips_request ('t', pmon_reg, 0,
2046 &err, mips_receive_wait, NULL);
2048 val = mips_request ('r', pmon_reg, 0,
2049 &err, mips_receive_wait, NULL);
2051 mips_error (_("Can't read register %d: %s"), regno,
2052 safe_strerror (errno));
2056 mips_set_register (regno, val);
2059 /* Prepare to store registers. The MIPS protocol can store individual
2060 registers, so this function doesn't have to do anything. */
2063 mips_prepare_to_store (struct regcache *regcache)
2067 /* Store remote register(s). */
2070 mips_store_registers (struct target_ops *ops,
2071 struct regcache *regcache, int regno)
2073 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2079 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2080 mips_store_registers (ops, regcache, regno);
2084 regcache_cooked_read_unsigned (regcache, regno, &val);
2085 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2086 mips_map_regno (gdbarch, regno),
2088 &err, mips_receive_wait, NULL);
2090 mips_error (_("Can't write register %d: %s"), regno,
2091 safe_strerror (errno));
2094 /* Fetch a word from the target board. Return word fetched in location
2095 addressed by VALP. Return 0 when successful; return positive error
2099 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2103 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2106 /* Data space failed; try instruction space. */
2107 *valp = mips_request ('i', addr, 0, &err,
2108 mips_receive_wait, NULL);
2113 /* Store a word to the target board. Returns errno code or zero for
2114 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2115 memory location there. */
2117 /* FIXME! make sure only 32-bit quantities get stored! */
2119 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2122 unsigned int oldcontents;
2124 oldcontents = mips_request ('D', addr, val, &err,
2125 mips_receive_wait, NULL);
2128 /* Data space failed; try instruction space. */
2129 oldcontents = mips_request ('I', addr, val, &err,
2130 mips_receive_wait, NULL);
2134 if (old_contents != NULL)
2135 *old_contents = oldcontents;
2139 /* Read or write LEN bytes from inferior memory at MEMADDR,
2140 transferring to or from debugger address MYADDR. Write to inferior
2141 if SHOULD_WRITE is nonzero. Returns length of data written or
2142 read; 0 for error. Note that protocol gives us the correct value
2143 for a longword, since it transfers values in ASCII. We want the
2144 byte values, so we have to swap the longword values. */
2146 static int mask_address_p = 1;
2149 mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2150 struct mem_attrib *attrib, struct target_ops *target)
2152 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
2159 /* PMON targets do not cope well with 64 bit addresses. Mask the
2160 value down to 32 bits. */
2162 memaddr &= (CORE_ADDR) 0xffffffff;
2164 /* Round starting address down to longword boundary. */
2165 addr = memaddr & ~3;
2166 /* Round ending address up; get number of longwords that makes. */
2167 count = (((memaddr + len) - addr) + 3) / 4;
2168 /* Allocate buffer of that many longwords. */
2169 buffer = alloca (count * 4);
2173 /* Fill start and end extra bytes of buffer with existing data. */
2174 if (addr != memaddr || len < 4)
2178 if (mips_fetch_word (addr, &val))
2181 /* Need part of initial word -- fetch it. */
2182 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2189 /* Need part of last word -- fetch it. FIXME: we do this even
2190 if we don't need it. */
2191 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2194 store_unsigned_integer (&buffer[(count - 1) * 4],
2195 4, byte_order, val);
2198 /* Copy data to be written over corresponding part of buffer. */
2200 memcpy ((char *) buffer + (memaddr & 3), myaddr, len);
2202 /* Write the entire buffer. */
2204 for (i = 0; i < count; i++, addr += 4)
2208 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2209 status = mips_store_word (addr, word, NULL);
2210 /* Report each kilobyte (we download 32-bit words at a time). */
2213 printf_unfiltered ("*");
2214 gdb_flush (gdb_stdout);
2221 /* FIXME: Do we want a QUIT here? */
2224 printf_unfiltered ("\n");
2228 /* Read all the longwords. */
2229 for (i = 0; i < count; i++, addr += 4)
2233 if (mips_fetch_word (addr, &val))
2236 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2240 /* Copy appropriate bytes out of the buffer. */
2241 memcpy (myaddr, buffer + (memaddr & 3), len);
2246 /* Print info on this target. */
2249 mips_files_info (struct target_ops *ignore)
2251 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2254 /* Kill the process running on the board. This will actually only
2255 work if we are doing remote debugging over the console input. I
2256 think that if IDT/sim had the remote debug interrupt enabled on the
2257 right port, we could interrupt the process with a break signal. */
2260 mips_kill (struct target_ops *ops)
2262 if (!mips_wait_flag)
2264 target_mourn_inferior ();
2270 if (interrupt_count >= 2)
2272 interrupt_count = 0;
2274 target_terminal_ours ();
2276 if (query (_("Interrupted while waiting for the program.\n\
2277 Give up (and stop debugging it)? ")))
2279 /* Clean up in such a way that mips_close won't try to talk
2280 to the board (it almost surely won't work since we
2281 weren't able to talk to it). */
2285 printf_unfiltered ("Ending remote MIPS debugging.\n");
2286 target_mourn_inferior ();
2288 deprecated_throw_reason (RETURN_QUIT);
2291 target_terminal_inferior ();
2294 if (remote_debug > 0)
2295 printf_unfiltered ("Sending break\n");
2297 serial_send_break (mips_desc);
2299 target_mourn_inferior ();
2308 serial_write (mips_desc, &cc, 1);
2310 target_mourn_inferior ();
2315 /* Start running on the target board. */
2318 mips_create_inferior (struct target_ops *ops, char *execfile,
2319 char *args, char **env, int from_tty)
2326 Can't pass arguments to remote MIPS board; arguments ignored."));
2327 /* And don't try to use them on the next "run" command. */
2328 execute_command ("set args", 0);
2331 if (execfile == 0 || exec_bfd == 0)
2332 error (_("No executable file specified"));
2334 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2336 init_wait_for_inferior ();
2338 regcache_write_pc (get_current_regcache (), entry_pt);
2341 /* Clean up after a process. The bulk of the work is done in mips_close(),
2342 which is called when unpushing the target. */
2345 mips_mourn_inferior (struct target_ops *ops)
2347 if (current_ops != NULL)
2348 unpush_target (current_ops);
2351 /* We can write a breakpoint and read the shadow contents in one
2354 /* Insert a breakpoint. On targets that don't have built-in
2355 breakpoint support, we read the contents of the target location and
2356 stash it, then overwrite it with a breakpoint instruction. ADDR is
2357 the target location in the target machine. BPT is the breakpoint
2358 being inserted or removed, which contains memory for saving the
2362 mips_insert_breakpoint (struct gdbarch *gdbarch,
2363 struct bp_target_info *bp_tgt)
2365 if (monitor_supports_breakpoints)
2366 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2369 return memory_insert_breakpoint (gdbarch, bp_tgt);
2372 /* Remove a breakpoint. */
2375 mips_remove_breakpoint (struct gdbarch *gdbarch,
2376 struct bp_target_info *bp_tgt)
2378 if (monitor_supports_breakpoints)
2379 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2382 return memory_remove_breakpoint (gdbarch, bp_tgt);
2385 /* Tell whether this target can support a hardware breakpoint. CNT
2386 is the number of hardware breakpoints already installed. This
2387 implements the target_can_use_hardware_watchpoint macro. */
2390 mips_can_use_watchpoint (int type, int cnt, int othertype)
2392 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2396 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2397 This is used for memory ref breakpoints. */
2399 static unsigned long
2400 calculate_mask (CORE_ADDR addr, int len)
2405 mask = addr ^ (addr + len - 1);
2407 for (i = 32; i >= 0; i--)
2413 mask = (unsigned long) 0xffffffff >> i;
2419 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2420 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2424 mips_insert_watchpoint (CORE_ADDR addr, int len, int type,
2425 struct expression *cond)
2427 if (mips_set_breakpoint (addr, len, type))
2433 /* Remove a watchpoint. */
2436 mips_remove_watchpoint (CORE_ADDR addr, int len, int type,
2437 struct expression *cond)
2439 if (mips_clear_breakpoint (addr, len, type))
2445 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2449 mips_stopped_by_watchpoint (void)
2451 return hit_watchpoint;
2455 /* Insert a breakpoint. */
2458 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2460 return mips_common_breakpoint (1, addr, len, type);
2464 /* Clear a breakpoint. */
2467 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2469 return mips_common_breakpoint (0, addr, len, type);
2473 /* Check the error code from the return packet for an LSI breakpoint
2474 command. If there's no error, just return 0. If it's a warning,
2475 print the warning text and return 0. If it's an error, print
2476 the error text and return 1. <ADDR> is the address of the breakpoint
2477 that was being set. <RERRFLG> is the error code returned by PMON.
2478 This is a helper function for mips_common_breakpoint. */
2481 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2483 struct lsi_error *err;
2484 const char *saddr = paddress (target_gdbarch, addr);
2486 if (rerrflg == 0) /* no error */
2489 /* Warnings can be ORed together, so check them all. */
2490 if (rerrflg & W_WARN)
2492 if (monitor_warnings)
2496 for (err = lsi_warning_table; err->code != 0; err++)
2498 if ((err->code & rerrflg) == err->code)
2501 fprintf_unfiltered (gdb_stderr, "\
2502 mips_common_breakpoint (%s): Warning: %s\n",
2508 fprintf_unfiltered (gdb_stderr, "\
2509 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2516 /* Errors are unique, i.e. can't be ORed together. */
2517 for (err = lsi_error_table; err->code != 0; err++)
2519 if ((err->code & rerrflg) == err->code)
2521 fprintf_unfiltered (gdb_stderr, "\
2522 mips_common_breakpoint (%s): Error: %s\n",
2528 fprintf_unfiltered (gdb_stderr, "\
2529 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2536 /* This routine sends a breakpoint command to the remote target.
2538 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2539 <ADDR> is the address of the breakpoint.
2540 <LEN> the length of the region to break on.
2541 <TYPE> is the type of breakpoint:
2542 0 = write (BREAK_WRITE)
2543 1 = read (BREAK_READ)
2544 2 = read/write (BREAK_ACCESS)
2545 3 = instruction fetch (BREAK_FETCH)
2547 Return 0 if successful; otherwise 1. */
2550 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2552 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
2553 char buf[DATA_MAXLEN + 1];
2555 int rpid, rerrflg, rresponse, rlen;
2558 addr = gdbarch_addr_bits_remove (target_gdbarch, addr);
2560 if (mips_monitor == MON_LSI)
2562 if (set == 0) /* clear breakpoint */
2564 /* The LSI PMON "clear breakpoint" has this form:
2565 <pid> 'b' <bptn> 0x0
2567 <pid> 'b' 0x0 <code>
2569 <bptn> is a breakpoint number returned by an earlier 'B' command.
2570 Possible return codes: OK, E_BPT. */
2574 /* Search for the breakpoint in the table. */
2575 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2576 if (lsi_breakpoints[i].type == type
2577 && lsi_breakpoints[i].addr == addr
2578 && lsi_breakpoints[i].len == len)
2581 /* Clear the table entry and tell PMON to clear the breakpoint. */
2582 if (i == MAX_LSI_BREAKPOINTS)
2585 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2586 paddress (target_gdbarch, addr));
2590 lsi_breakpoints[i].type = BREAK_UNUSED;
2591 sprintf (buf, "0x0 b 0x%x 0x0", i);
2592 mips_send_packet (buf, 1);
2594 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2597 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2599 mips_error (_("mips_common_breakpoint: "
2600 "Bad response from remote board: %s"),
2603 return (mips_check_lsi_error (addr, rerrflg));
2606 /* set a breakpoint */
2608 /* The LSI PMON "set breakpoint" command has this form:
2609 <pid> 'B' <addr> 0x0
2611 <pid> 'B' <bptn> <code>
2613 The "set data breakpoint" command has this form:
2615 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2617 where: type= "0x1" = read
2619 "0x3" = access (read or write)
2621 The reply returns two values:
2622 bptn - a breakpoint number, which is a small integer with
2623 possible values of zero through 255.
2624 code - an error return code, a value of zero indicates a
2625 succesful completion, other values indicate various
2626 errors and warnings.
2628 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2630 if (type == BREAK_FETCH) /* instruction breakpoint */
2633 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2639 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2640 phex_nz (addr, addr_size),
2641 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2642 phex_nz (addr + len - 1, addr_size));
2644 mips_send_packet (buf, 1);
2646 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2649 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2650 &rpid, &rcmd, &rresponse, &rerrflg);
2651 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2652 mips_error (_("mips_common_breakpoint: "
2653 "Bad response from remote board: %s"),
2657 if (mips_check_lsi_error (addr, rerrflg))
2660 /* rresponse contains PMON's breakpoint number. Record the
2661 information for this breakpoint so we can clear it later. */
2662 lsi_breakpoints[rresponse].type = type;
2663 lsi_breakpoints[rresponse].addr = addr;
2664 lsi_breakpoints[rresponse].len = len;
2671 /* On non-LSI targets, the breakpoint command has this form:
2672 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2673 <MASK> is a don't care mask for addresses.
2674 <FLAGS> is any combination of `r', `w', or `f' for
2675 read/write/fetch. */
2679 mask = calculate_mask (addr, len);
2682 if (set) /* set a breakpoint */
2688 case BREAK_WRITE: /* write */
2691 case BREAK_READ: /* read */
2694 case BREAK_ACCESS: /* read/write */
2697 case BREAK_FETCH: /* fetch */
2701 internal_error (__FILE__, __LINE__,
2702 _("failed internal consistency check"));
2706 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2707 phex_nz (mask, addr_size), flags);
2712 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2715 mips_send_packet (buf, 1);
2717 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2720 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2721 &rpid, &rcmd, &rerrflg, &rresponse);
2723 if (nfields != 4 || rcmd != cmd)
2724 mips_error (_("mips_common_breakpoint: "
2725 "Bad response from remote board: %s"),
2730 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2731 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2732 if (mips_monitor == MON_DDB)
2733 rresponse = rerrflg;
2734 if (rresponse != 22) /* invalid argument */
2735 fprintf_unfiltered (gdb_stderr, "\
2736 mips_common_breakpoint (%s): Got error: 0x%x\n",
2737 paddress (target_gdbarch, addr), rresponse);
2744 /* Send one S record as specified by SREC of length LEN, starting
2745 at ADDR. Note, however, that ADDR is not used except to provide
2746 a useful message to the user in the event that a NACK is received
2750 send_srec (char *srec, int len, CORE_ADDR addr)
2756 serial_write (mips_desc, srec, len);
2758 ch = mips_readchar (remote_timeout);
2762 case SERIAL_TIMEOUT:
2763 error (_("Timeout during download."));
2767 case 0x15: /* NACK */
2768 fprintf_unfiltered (gdb_stderr,
2769 "Download got a NACK at byte %s! Retrying.\n",
2770 paddress (target_gdbarch, addr));
2773 error (_("Download got unexpected ack char: 0x%x, retrying."),
2779 /* Download a binary file by converting it to S records. */
2782 mips_load_srec (char *args)
2786 char *buffer, srec[1024];
2788 unsigned int srec_frame = 200;
2790 static int hashmark = 1;
2792 buffer = alloca (srec_frame * 2 + 256);
2794 abfd = bfd_openr (args, 0);
2797 printf_filtered ("Unable to open file %s\n", args);
2801 if (bfd_check_format (abfd, bfd_object) == 0)
2803 printf_filtered ("File is not an object file\n");
2807 /* This actually causes a download in the IDT binary format: */
2808 mips_send_command (LOAD_CMD, 0);
2810 for (s = abfd->sections; s; s = s->next)
2812 if (s->flags & SEC_LOAD)
2814 unsigned int numbytes;
2816 /* FIXME! vma too small????? */
2817 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2819 (long) (s->vma + bfd_get_section_size (s)));
2820 gdb_flush (gdb_stdout);
2822 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2824 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2826 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2828 reclen = mips_make_srec (srec, '3', s->vma + i,
2830 send_srec (srec, reclen, s->vma + i);
2832 if (deprecated_ui_load_progress_hook)
2833 deprecated_ui_load_progress_hook (s->name, i);
2837 putchar_unfiltered ('#');
2838 gdb_flush (gdb_stdout);
2841 } /* Per-packet (or S-record) loop */
2843 putchar_unfiltered ('\n');
2844 } /* Loadable sections */
2847 putchar_unfiltered ('\n');
2849 /* Write a type 7 terminator record. no data for a type 7, and there
2850 is no data, so len is 0. */
2852 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2854 send_srec (srec, reclen, abfd->start_address);
2856 serial_flush_input (mips_desc);
2860 * mips_make_srec -- make an srecord. This writes each line, one at a
2861 * time, each with it's own header and trailer line.
2862 * An srecord looks like this:
2864 * byte count-+ address
2865 * start ---+ | | data +- checksum
2867 * S01000006F6B692D746573742E73726563E4
2868 * S315000448600000000000000000FC00005900000000E9
2869 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2870 * S30B0004485A0000000000004E
2873 * S<type><length><address><data><checksum>
2877 * is the number of bytes following upto the checksum. Note that
2878 * this is not the number of chars following, since it takes two
2879 * chars to represent a byte.
2883 * 1) two byte address data record
2884 * 2) three byte address data record
2885 * 3) four byte address data record
2886 * 7) four byte address termination record
2887 * 8) three byte address termination record
2888 * 9) two byte address termination record
2891 * is the start address of the data following, or in the case of
2892 * a termination record, the start address of the image
2896 * is the sum of all the raw byte data in the record, from the length
2897 * upwards, modulo 256 and subtracted from 255.
2899 * This routine returns the length of the S-record.
2904 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2907 unsigned char checksum;
2910 /* Create the header for the srec. addr_size is the number of bytes
2911 in the address, and 1 is the number of bytes in the count. */
2913 /* FIXME!! bigger buf required for 64-bit! */
2916 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2917 /* This assumes S3 style downloads (4byte addresses). There should
2918 probably be a check, or the code changed to make it more
2920 buf[3] = memaddr >> 24;
2921 buf[4] = memaddr >> 16;
2922 buf[5] = memaddr >> 8;
2924 memcpy (&buf[7], myaddr, len);
2926 /* Note that the checksum is calculated on the raw data, not the
2927 hexified data. It includes the length, address and the data
2928 portions of the packet. */
2930 buf += 2; /* Point at length byte. */
2931 for (i = 0; i < len + 4 + 1; i++)
2939 /* The following manifest controls whether we enable the simple flow
2940 control support provided by the monitor. If enabled the code will
2941 wait for an affirmative ACK between transmitting packets. */
2942 #define DOETXACK (1)
2944 /* The PMON fast-download uses an encoded packet format constructed of
2945 3byte data packets (encoded as 4 printable ASCII characters), and
2946 escape sequences (preceded by a '/'):
2949 'C' compare checksum (12bit value, not included in checksum calculation)
2950 'S' define symbol name (for addr) terminated with ","
2951 and padded to 4char boundary
2952 'Z' zero fill multiple of 3bytes
2953 'B' byte (12bit encoded value, of 8bit data)
2954 'A' address (36bit encoded value)
2955 'E' define entry as original address, and exit load
2957 The packets are processed in 4 character chunks, so the escape
2958 sequences that do not have any data (or variable length data)
2959 should be padded to a 4 character boundary. The decoder will give
2960 an error if the complete message block size is not a multiple of
2961 4bytes (size of record).
2963 The encoding of numbers is done in 6bit fields. The 6bit value is
2964 used to index into this string to get the specific character
2965 encoding for the value: */
2966 static char encoding[] =
2967 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2969 /* Convert the number of bits required into an encoded number, 6bits
2970 at a time (range 0..63). Keep a checksum if required (passed
2971 pointer non-NULL). The function returns the number of encoded
2972 characters written into the buffer. */
2975 pmon_makeb64 (unsigned long v, char *p, int n, int *chksum)
2977 int count = (n / 6);
2981 fprintf_unfiltered (gdb_stderr,
2982 "Fast encoding bitcount must be a "
2983 "multiple of 12bits: %dbit%s\n",
2984 n, (n == 1) ? "" : "s");
2989 fprintf_unfiltered (gdb_stderr,
2990 "Fast encoding cannot process more "
2991 "than 36bits at the moment: %dbits\n", n);
2995 /* Deal with the checksum: */
3001 *chksum += ((v >> 24) & 0xFFF);
3003 *chksum += ((v >> 12) & 0xFFF);
3005 *chksum += ((v >> 0) & 0xFFF);
3012 *p++ = encoding[(v >> n) & 0x3F];
3019 /* Shorthand function (that could be in-lined) to output the zero-fill
3020 escape sequence into the data stream. */
3023 pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum)
3027 sprintf (*buff, "/Z");
3028 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3029 *buff += (count + 2);
3031 return (recsize + count + 2);
3034 /* Add the checksum specified by *VALUE to end of the record under
3035 construction. *BUF specifies the location at which to begin
3036 writing characters comprising the checksum information. RECSIZE
3037 specifies the size of the record constructed thus far. (A trailing
3038 NUL character may be present in the buffer holding the record, but
3039 the record size does not include this character.)
3041 Return the total size of the record after adding the checksum escape,
3042 the checksum itself, and the trailing newline.
3044 The checksum specified by *VALUE is zeroed out prior to returning.
3045 Additionally, *BUF is updated to refer to the location just beyond
3046 the record elements added by this call. */
3049 pmon_checkset (int recsize, char **buff, int *value)
3053 /* Add the checksum (without updating the value): */
3054 sprintf (*buff, "/C");
3055 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3056 *buff += (count + 2);
3057 sprintf (*buff, "\n");
3058 *buff += 2; /* Include zero terminator. */
3059 /* Forcing a checksum validation clears the sum: */
3061 return (recsize + count + 3);
3064 /* Amount of padding we leave after at the end of the output buffer,
3065 for the checksum and line termination characters: */
3066 #define CHECKSIZE (4 + 4 + 4 + 2)
3067 /* zero-fill, checksum, transfer end and line termination space. */
3069 /* The amount of binary data loaded from the object file in a single
3071 #define BINCHUNK (1024)
3073 /* Maximum line of data accepted by the monitor: */
3074 #define MAXRECSIZE (550)
3075 /* NOTE: This constant depends on the monitor being used. This value
3076 is for PMON 5.x on the Cogent Vr4300 board. */
3078 /* Create a FastLoad format record.
3080 *OUTBUF is the buffer into which a FastLoad formatted record is
3081 written. On return, the pointer position represented by *OUTBUF
3082 is updated to point at the end of the data, i.e. the next position
3083 in the buffer that may be written. No attempt is made to NUL-
3084 terminate this portion of the record written to the buffer.
3086 INBUF contains the binary input data from which the FastLoad
3087 formatted record will be built. *INPTR is an index into this
3088 buffer. *INPTR is updated as the input is consumed. Thus, on
3089 return, the caller has access to the position of the next input
3090 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3093 *RECSIZE will be written with the size of the record written to the
3094 output buffer prior to returning. This size does not include a
3095 NUL-termination byte as none is written to the output buffer.
3097 *CSUM is the output buffer checksum. It is updated as data is
3098 written to the output buffer.
3100 *ZEROFILL is the current number of 3-byte zero sequences that have
3101 been encountered. It is both an input and an output to this
3105 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3106 int inamount, int *recsize, unsigned int *csum,
3107 unsigned int *zerofill)
3112 /* This is a simple check to ensure that our data will fit within
3113 the maximum allowable record size. Each record output is 4bytes
3114 in length. We must allow space for a pending zero fill command,
3115 the record, and a checksum record. */
3116 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3118 /* Process the binary data: */
3119 if ((inamount - *inptr) < 3)
3122 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3124 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3126 *recsize += (2 + count);
3131 unsigned int value = ((inbuf[*inptr + 0] << 16)
3132 | (inbuf[*inptr + 1] << 8)
3133 | (inbuf[*inptr + 2]));
3135 /* Simple check for zero data. TODO: A better check would be
3136 to check the last, and then the middle byte for being zero
3137 (if the first byte is not). We could then check for
3138 following runs of zeros, and if above a certain size it is
3139 worth the 4 or 8 character hit of the byte insertions used
3140 to pad to the start of the zeroes. NOTE: This also depends
3141 on the alignment at the end of the zero run. */
3142 if (value == 0x00000000)
3145 if (*zerofill == 0xFFF) /* 12bit counter */
3146 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3151 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3152 count = pmon_makeb64 (value, p, 24, csum);
3164 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3165 output the message specified by MESG. Return -1 for failure, 0
3169 pmon_check_ack (char *mesg)
3171 #if defined(DOETXACK)
3176 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3178 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3180 fprintf_unfiltered (gdb_stderr,
3181 "Failed to receive valid ACK for %s\n", mesg);
3182 return (-1); /* Terminate the download. */
3185 #endif /* DOETXACK */
3189 /* pmon_download - Send a sequence of characters to the PMON download port,
3190 which is either a serial port or a UDP socket. */
3193 pmon_start_download (void)
3197 /* Create the temporary download file. */
3198 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3199 perror_with_name (tftp_localname);
3203 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3204 mips_expect ("Downloading from ");
3205 mips_expect (udp_in_use ? "udp" : "tty0");
3206 mips_expect (", ^C to abort\r\n");
3210 /* Look for the string specified by STRING sent from the target board
3211 during a download operation. If the string in question is not
3212 seen, output an error message, remove the temporary file, if
3213 appropriate, and return 0. Otherwise, return 1 to indicate
3217 mips_expect_download (char *string)
3219 if (!mips_expect (string))
3221 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3223 remove (tftp_localname); /* Remove temporary file. */
3230 /* Look for messages from the target board associated with the entry
3233 NOTE: This function doesn't indicate success or failure, so we
3234 have no way to determine whether or not the output from the board
3235 was correctly seen. However, given that other items are checked
3236 after this, it seems unlikely that those checks will pass if this
3237 check doesn't first (silently) pass. */
3240 pmon_check_entry_address (char *entry_address, int final)
3242 char hexnumber[9]; /* Includes '\0' space. */
3244 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3245 sprintf (hexnumber, "%x", final);
3246 mips_expect (hexnumber);
3247 mips_expect ("\r\n");
3250 /* Look for messages from the target board showing the total number of
3251 bytes downloaded to the board. Output 1 for success if the tail
3252 end of the message was read correctly, 0 otherwise. */
3255 pmon_check_total (int bintotal)
3257 char hexnumber[9]; /* Includes '\0' space. */
3259 mips_expect ("\r\ntotal = 0x");
3260 sprintf (hexnumber, "%x", bintotal);
3261 mips_expect (hexnumber);
3262 return mips_expect_download (" bytes\r\n");
3265 /* Look for the termination messages associated with the end of
3266 a download to the board.
3268 Also, when `tftp_in_use' is set, issue the load command to the
3269 board causing the file to be transferred. (This is done prior
3270 to looking for the above mentioned termination messages.) */
3273 pmon_end_download (int final, int bintotal)
3275 char hexnumber[9]; /* Includes '\0' space. */
3279 static char *load_cmd_prefix = "load -b -s ";
3283 /* Close off the temporary file containing the load data. */
3287 /* Make the temporary file readable by the world. */
3288 if (stat (tftp_localname, &stbuf) == 0)
3289 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3291 /* Must reinitialize the board to prevent PMON from crashing. */
3292 if (mips_monitor != MON_ROCKHOPPER)
3293 mips_send_command ("initEther\r", -1);
3295 /* Send the load command. */
3296 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3297 strcpy (cmd, load_cmd_prefix);
3298 strcat (cmd, tftp_name);
3300 mips_send_command (cmd, 0);
3302 if (!mips_expect_download ("Downloading from "))
3304 if (!mips_expect_download (tftp_name))
3306 if (!mips_expect_download (", ^C to abort\r\n"))
3310 /* Wait for the stuff that PMON prints after the load has completed.
3311 The timeout value for use in the tftp case (15 seconds) was picked
3312 arbitrarily but might be too small for really large downloads. FIXME. */
3313 switch (mips_monitor)
3316 pmon_check_ack ("termination");
3317 pmon_check_entry_address ("Entry address is ", final);
3318 if (!pmon_check_total (bintotal))
3321 case MON_ROCKHOPPER:
3322 if (!pmon_check_total (bintotal))
3324 pmon_check_entry_address ("Entry Address = ", final);
3327 pmon_check_entry_address ("Entry Address = ", final);
3328 pmon_check_ack ("termination");
3329 if (!pmon_check_total (bintotal))
3335 remove (tftp_localname); /* Remove temporary file. */
3338 /* Write the buffer specified by BUFFER of length LENGTH to either
3339 the board or the temporary file that'll eventually be transferred
3343 pmon_download (char *buffer, int length)
3346 fwrite (buffer, 1, length, tftp_file);
3348 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3351 /* Open object or executable file, FILE, and send it to the board
3352 using the FastLoad format. */
3355 pmon_load_fast (char *file)
3359 unsigned char *binbuf;
3362 unsigned int csum = 0;
3363 int hashmark = !tftp_in_use;
3368 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3369 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3371 abfd = bfd_openr (file, 0);
3374 printf_filtered ("Unable to open file %s\n", file);
3378 if (bfd_check_format (abfd, bfd_object) == 0)
3380 printf_filtered ("File is not an object file\n");
3384 /* Setup the required download state: */
3385 mips_send_command ("set dlproto etxack\r", -1);
3386 mips_send_command ("set dlecho off\r", -1);
3387 /* NOTE: We get a "cannot set variable" message if the variable is
3388 already defined to have the argument we give. The code doesn't
3389 care, since it just scans to the next prompt anyway. */
3390 /* Start the download: */
3391 pmon_start_download ();
3393 /* Zero the checksum. */
3394 sprintf (buffer, "/Kxx\n");
3395 reclen = strlen (buffer);
3396 pmon_download (buffer, reclen);
3397 finished = pmon_check_ack ("/Kxx");
3399 for (s = abfd->sections; s && !finished; s = s->next)
3400 if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */
3402 bintotal += bfd_get_section_size (s);
3403 final = (s->vma + bfd_get_section_size (s));
3405 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name,
3406 (unsigned int) s->vma,
3407 (unsigned int) (s->vma + bfd_get_section_size (s)));
3408 gdb_flush (gdb_stdout);
3410 /* Output the starting address. */
3411 sprintf (buffer, "/A");
3412 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3413 buffer[2 + reclen] = '\n';
3414 buffer[3 + reclen] = '\0';
3415 reclen += 3; /* For the initial escape code and carriage return. */
3416 pmon_download (buffer, reclen);
3417 finished = pmon_check_ack ("/A");
3421 unsigned int binamount;
3422 unsigned int zerofill = 0;
3429 i < bfd_get_section_size (s) && !finished;
3434 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3436 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3438 /* This keeps a rolling checksum, until we decide to output
3440 for (; ((binamount - binptr) > 0);)
3442 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3443 &reclen, &csum, &zerofill);
3444 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3446 reclen = pmon_checkset (reclen, &bp, &csum);
3447 pmon_download (buffer, reclen);
3448 finished = pmon_check_ack ("data record");
3451 zerofill = 0; /* Do not transmit pending
3456 if (deprecated_ui_load_progress_hook)
3457 deprecated_ui_load_progress_hook (s->name, i);
3461 putchar_unfiltered ('#');
3462 gdb_flush (gdb_stdout);
3466 reclen = 0; /* buffer processed */
3471 /* Ensure no out-standing zerofill requests: */
3473 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3475 /* and then flush the line: */
3478 reclen = pmon_checkset (reclen, &bp, &csum);
3479 /* Currently pmon_checkset outputs the line terminator by
3480 default, so we write out the buffer so far: */
3481 pmon_download (buffer, reclen);
3482 finished = pmon_check_ack ("record remnant");
3486 putchar_unfiltered ('\n');
3489 /* Terminate the transfer. We know that we have an empty output
3490 buffer at this point. */
3491 sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */
3492 reclen = strlen (buffer);
3493 pmon_download (buffer, reclen);
3496 { /* Ignore the termination message: */
3497 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3500 { /* Deal with termination message: */
3501 pmon_end_download (final, bintotal);
3507 /* mips_load -- download a file. */
3510 mips_load (char *file, int from_tty)
3512 struct regcache *regcache;
3514 /* Get the board out of remote debugging mode. */
3515 if (mips_exit_debug ())
3516 error (_("mips_load: Couldn't get into monitor mode."));
3518 if (mips_monitor != MON_IDT)
3519 pmon_load_fast (file);
3521 mips_load_srec (file);
3525 /* Finally, make the PC point at the start address. */
3526 regcache = get_current_regcache ();
3527 if (mips_monitor != MON_IDT)
3529 /* Work around problem where PMON monitor updates the PC after a load
3530 to a different value than GDB thinks it has. The following ensures
3531 that the regcache_write_pc() WILL update the PC value: */
3532 regcache_invalidate (regcache,
3533 mips_regnum (get_regcache_arch (regcache))->pc);
3536 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3539 /* Check to see if a thread is still alive. */
3542 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3544 if (ptid_equal (ptid, remote_mips_ptid))
3545 /* The monitor's task is always alive. */
3551 /* Convert a thread ID to a string. Returns the string in a static
3555 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3557 static char buf[64];
3559 if (ptid_equal (ptid, remote_mips_ptid))
3561 xsnprintf (buf, sizeof buf, "Thread <main>");
3565 return normal_pid_to_str (ptid);
3568 /* Pass the command argument as a packet to PMON verbatim. */
3571 pmon_command (char *args, int from_tty)
3573 char buf[DATA_MAXLEN + 1];
3576 sprintf (buf, "0x0 %s", args);
3577 mips_send_packet (buf, 1);
3578 printf_filtered ("Send packet: %s\n", buf);
3580 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3582 printf_filtered ("Received packet: %s\n", buf);
3585 /* -Wmissing-prototypes */
3586 extern initialize_file_ftype _initialize_remote_mips;
3588 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3589 Create target specific commands and perform other initializations
3590 specific to this file. */
3593 _initialize_remote_mips (void)
3595 /* Initialize the fields in mips_ops that are common to all four targets. */
3596 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3597 mips_ops.to_close = mips_close;
3598 mips_ops.to_detach = mips_detach;
3599 mips_ops.to_resume = mips_resume;
3600 mips_ops.to_fetch_registers = mips_fetch_registers;
3601 mips_ops.to_store_registers = mips_store_registers;
3602 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3603 mips_ops.deprecated_xfer_memory = mips_xfer_memory;
3604 mips_ops.to_files_info = mips_files_info;
3605 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3606 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3607 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3608 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3609 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3610 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3611 mips_ops.to_kill = mips_kill;
3612 mips_ops.to_load = mips_load;
3613 mips_ops.to_create_inferior = mips_create_inferior;
3614 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3615 mips_ops.to_thread_alive = mips_thread_alive;
3616 mips_ops.to_pid_to_str = mips_pid_to_str;
3617 mips_ops.to_log_command = serial_log_command;
3618 mips_ops.to_stratum = process_stratum;
3619 mips_ops.to_has_all_memory = default_child_has_all_memory;
3620 mips_ops.to_has_memory = default_child_has_memory;
3621 mips_ops.to_has_stack = default_child_has_stack;
3622 mips_ops.to_has_registers = default_child_has_registers;
3623 mips_ops.to_has_execution = default_child_has_execution;
3624 mips_ops.to_magic = OPS_MAGIC;
3626 /* Copy the common fields to all four target vectors. */
3627 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3629 /* Initialize target-specific fields in the target vectors. */
3630 mips_ops.to_shortname = "mips";
3631 mips_ops.to_doc = "\
3632 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3633 The argument is the device it is connected to or, if it contains a colon,\n\
3634 HOST:PORT to access a board over a network";
3635 mips_ops.to_open = mips_open;
3636 mips_ops.to_wait = mips_wait;
3638 pmon_ops.to_shortname = "pmon";
3639 pmon_ops.to_doc = "\
3640 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3641 line. The argument is the device it is connected to or, if it contains a\n\
3642 colon, HOST:PORT to access a board over a network";
3643 pmon_ops.to_open = pmon_open;
3644 pmon_ops.to_wait = mips_wait;
3646 ddb_ops.to_shortname = "ddb";
3648 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3649 line. The first argument is the device it is connected to or, if it contains\n\
3650 a colon, HOST:PORT to access a board over a network. The optional second\n\
3651 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3652 TFTP downloads to the board. The optional third parameter is the local name\n\
3653 of the TFTP temporary file, if it differs from the filename seen by the board.";
3654 ddb_ops.to_open = ddb_open;
3655 ddb_ops.to_wait = mips_wait;
3657 rockhopper_ops.to_shortname = "rockhopper";
3658 rockhopper_ops.to_doc = ddb_ops.to_doc;
3659 rockhopper_ops.to_open = rockhopper_open;
3660 rockhopper_ops.to_wait = mips_wait;
3662 lsi_ops.to_shortname = "lsi";
3663 lsi_ops.to_doc = pmon_ops.to_doc;
3664 lsi_ops.to_open = lsi_open;
3665 lsi_ops.to_wait = mips_wait;
3667 /* Add the targets. */
3668 add_target (&mips_ops);
3669 add_target (&pmon_ops);
3670 add_target (&ddb_ops);
3671 add_target (&lsi_ops);
3672 add_target (&rockhopper_ops);
3674 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3675 Set timeout in seconds for remote MIPS serial I/O."), _("\
3676 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3678 NULL, /* FIXME: i18n: */
3679 &setlist, &showlist);
3681 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3682 &mips_retransmit_wait, _("\
3683 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3684 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3685 This is the number of seconds to wait for an acknowledgement to a packet\n\
3686 before resending the packet."),
3688 NULL, /* FIXME: i18n: */
3689 &setlist, &showlist);
3691 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3692 &mips_syn_garbage, _("\
3693 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3694 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3695 This is the maximum number of characters GDB will ignore when trying to\n\
3696 synchronize with the remote system. A value of -1 means that there is no\n\
3697 limit. (Note that these characters are printed out even though they are\n\
3700 NULL, /* FIXME: i18n: */
3701 &setlist, &showlist);
3703 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3704 &mips_monitor_prompt, _("\
3705 Set the prompt that GDB expects from the monitor."), _("\
3706 Show the prompt that GDB expects from the monitor."), NULL,
3708 NULL, /* FIXME: i18n: */
3709 &setlist, &showlist);
3711 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3712 &monitor_warnings, _("\
3713 Set printing of monitor warnings."), _("\
3714 Show printing of monitor warnings."), _("\
3715 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3717 NULL, /* FIXME: i18n: */
3718 &setlist, &showlist);
3720 add_com ("pmon", class_obscure, pmon_command,
3721 _("Send a packet to PMON (must be in debug mode)."));
3723 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3724 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3725 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3726 Use \"on\" to enable the masking and \"off\" to disable it."),
3728 NULL, /* FIXME: i18n: */
3729 &setlist, &showlist);
3730 remote_mips_ptid = ptid_build (42000, 0, 42000);