1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by Ian Lance Taylor
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "exceptions.h"
35 #include "gdb_usleep.h"
38 #include "mips-tdep.h"
39 #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 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 (struct target_ops *self);
90 static int mips_map_regno (struct gdbarch *, int);
92 static void mips_set_register (int regno, ULONGEST value);
94 static void mips_prepare_to_store (struct target_ops *self,
95 struct regcache *regcache);
97 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
99 static int mips_store_word (CORE_ADDR addr, unsigned int value,
102 static enum target_xfer_status mips_xfer_memory (gdb_byte *readbuf,
103 const gdb_byte *writebuf,
106 ULONGEST *xfered_len);
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, unsigned int *chksum);
114 static int pmon_zeroset (int recsize, char **buff, unsigned int *amount,
115 unsigned int *chksum);
117 static int pmon_checkset (int recsize, char **buff, unsigned 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 (struct target_ops *self, 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,...)
494 target_terminal_ours ();
495 wrap_here (""); /* Force out any buffered output. */
496 gdb_flush (gdb_stdout);
497 gdb_flush (gdb_stderr);
499 /* Clean up in such a way that mips_close won't try to talk to the
500 board (it almost surely won't work since we weren't able to talk to
504 if (!ptid_equal (inferior_ptid, null_ptid))
505 target_mourn_inferior ();
507 fmt = concat (_("Ending remote MIPS debugging: "),
508 string, (char *) NULL);
509 make_cleanup (xfree, fmt);
511 va_start (args, string);
512 throw_verror (TARGET_CLOSE_ERROR, fmt, args);
516 /* putc_readable - print a character, displaying non-printable chars in
517 ^x notation or in hex. */
520 fputc_readable (int ch, struct ui_file *file)
523 fputc_unfiltered ('\n', file);
525 fprintf_unfiltered (file, "\\r");
526 else if (ch < 0x20) /* ASCII control character */
527 fprintf_unfiltered (file, "^%c", ch + '@');
528 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
529 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
531 fputc_unfiltered (ch, file);
535 /* puts_readable - print a string, displaying non-printable chars in
536 ^x notation or in hex. */
539 fputs_readable (const char *string, struct ui_file *file)
543 while ((c = *string++) != '\0')
544 fputc_readable (c, file);
548 /* Read P as a hex value. Return true if every character made sense,
549 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
552 read_hex_value (const char *p, ULONGEST *result)
560 if (*p >= '0' && *p <= '9')
562 else if (*p >= 'A' && *p <= 'F')
563 retval |= *p - 'A' + 10;
564 else if (*p >= 'a' && *p <= 'f')
565 retval |= *p - 'a' + 10;
575 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
576 timed out. TIMEOUT specifies timeout value in seconds. */
579 mips_expect_timeout (const char *string, int timeout)
581 const char *p = string;
585 fprintf_unfiltered (gdb_stdlog, "Expected \"");
586 fputs_readable (string, gdb_stdlog);
587 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 DATASTR points to the packet data. LEN is the length of DATASTR. */
830 mips_cksum (const unsigned char *hdr, const char *datastr, int len)
832 const unsigned char *p;
833 const unsigned char *data = (const unsigned char *) datastr;
839 /* The initial SYN is not included in the checksum. */
853 /* Send a packet containing the given ASCII string. */
856 mips_send_packet (const char *s, int get_ack)
858 /* unsigned */ int len;
859 unsigned char *packet;
864 if (len > DATA_MAXLEN)
865 mips_error (_("MIPS protocol data packet too long: %s"), s);
867 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
869 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
870 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
871 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
872 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
874 memcpy (packet + HDR_LENGTH, s, len);
876 cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len);
877 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
878 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
879 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
881 /* Increment the sequence number. This will set mips_send_seq to
882 the sequence number we expect in the acknowledgement. */
883 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
885 /* We can only have one outstanding data packet, so we just wait for
886 the acknowledgement here. Keep retransmitting the packet until
887 we get one, or until we've tried too many times. */
888 for (try = 0; try < mips_send_retries; try++)
893 if (remote_debug > 0)
895 /* Don't use _filtered; we can't deal with a QUIT out of
896 target_wait, and I think this might be called from there. */
897 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
898 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
901 if (serial_write (mips_desc, packet,
902 HDR_LENGTH + len + TRLR_LENGTH) != 0)
903 mips_error (_("write to target failed: %s"), safe_strerror (errno));
912 unsigned char hdr[HDR_LENGTH + 1];
913 unsigned char trlr[TRLR_LENGTH + 1];
917 /* Get the packet header. If we time out, resend the data
919 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
925 /* If we get a data packet, assume it is a duplicate and
926 ignore it. FIXME: If the acknowledgement is lost, this
927 data packet may be the packet the remote sends after the
929 if (HDR_IS_DATA (hdr))
933 /* Ignore any errors raised whilst attempting to ignore
936 len = HDR_GET_LEN (hdr);
938 for (i = 0; i < len; i++)
942 rch = mips_readchar (remote_timeout);
948 if (rch == SERIAL_TIMEOUT)
950 /* Ignore the character. */
954 (void) mips_receive_trailer (trlr, &garbage, &ch,
957 /* We don't bother checking the checksum, or providing an
958 ACK to the packet. */
962 /* If the length is not 0, this is a garbled packet. */
963 if (HDR_GET_LEN (hdr) != 0)
966 /* Get the packet trailer. */
967 err = mips_receive_trailer (trlr, &garbage, &ch,
968 mips_retransmit_wait);
970 /* If we timed out, resend the data packet. */
974 /* If we got a bad character, reread the header. */
978 /* If the checksum does not match the trailer checksum, this
979 is a bad packet; ignore it. */
980 if (mips_cksum (hdr, NULL, 0) != 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, 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, 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!"))
1390 do_cleanups (old_cleanups);
1395 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1397 if (!mips_expect (mips_monitor_prompt))
1399 do_cleanups (old_cleanups);
1403 do_cleanups (old_cleanups);
1408 /* Initialize a new connection to the MIPS board, and make sure we are
1409 really connected. */
1412 mips_initialize (void)
1415 struct cleanup *old_cleanups;
1418 /* What is this code doing here? I don't see any way it can happen, and
1419 it might mean mips_initializing didn't get cleared properly.
1420 So I'll make it a warning. */
1422 if (mips_initializing)
1424 warning (_("internal error: mips_initialize called twice"));
1428 old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1431 mips_initializing = 1;
1433 /* At this point, the packit protocol isn't responding. We'll try getting
1434 into the monitor, and restarting the protocol. */
1436 /* Force the system into the monitor. After this we *should* be at
1437 the mips_monitor_prompt. */
1438 if (mips_monitor != MON_IDT)
1439 j = 0; /* Start by checking if we are already
1442 j = 1; /* Start by sending a break. */
1447 case 0: /* First, try sending a CR. */
1448 serial_flush_input (mips_desc);
1449 serial_write (mips_desc, "\r", 1);
1451 case 1: /* First, try sending a break. */
1452 serial_send_break (mips_desc);
1454 case 2: /* Then, try a ^C. */
1455 serial_write (mips_desc, "\003", 1);
1457 case 3: /* Then, try escaping from download. */
1459 if (mips_monitor != MON_IDT)
1463 /* We shouldn't need to send multiple termination
1464 sequences, since the target performs line (or
1465 block) reads, and then processes those
1466 packets. In-case we were downloading a large packet
1467 we flush the output buffer before inserting a
1468 termination sequence. */
1469 serial_flush_output (mips_desc);
1470 sprintf (tbuff, "\r/E/E\r");
1471 serial_write (mips_desc, tbuff, 6);
1478 /* We are possibly in binary download mode, having
1479 aborted in the middle of an S-record. ^C won't
1480 work because of binary mode. The only reliable way
1481 out is to send enough termination packets (8 bytes)
1482 to fill up and then overflow the largest size
1483 S-record (255 bytes in this case). This amounts to
1484 256/8 + 1 packets. */
1486 mips_make_srec (srec, '7', 0, NULL, 0);
1488 for (i = 1; i <= 33; i++)
1490 serial_write (mips_desc, srec, 8);
1492 if (serial_readchar (mips_desc, 0) >= 0)
1493 break; /* Break immediatly if we get something from
1500 mips_error (_("Failed to initialize."));
1503 if (mips_expect (mips_monitor_prompt))
1507 if (mips_monitor != MON_IDT)
1509 /* Sometimes PMON ignores the first few characters in the first
1510 command sent after a load. Sending a blank command gets
1512 mips_send_command ("\r", -1);
1514 /* Ensure the correct target state: */
1515 if (mips_monitor != MON_LSI)
1516 mips_send_command ("set regsize 64\r", -1);
1517 mips_send_command ("set hostport tty0\r", -1);
1518 mips_send_command ("set brkcmd \"\"\r", -1);
1519 /* Delete all the current breakpoints: */
1520 mips_send_command ("db *\r", -1);
1521 /* NOTE: PMON does not have breakpoint support through the
1522 "debug" mode, only at the monitor command-line. */
1525 mips_enter_debug ();
1527 /* Clear all breakpoints: */
1528 if ((mips_monitor == MON_IDT
1529 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1530 || mips_monitor == MON_LSI)
1531 monitor_supports_breakpoints = 1;
1533 monitor_supports_breakpoints = 0;
1535 do_cleanups (old_cleanups);
1537 /* If this doesn't call error, we have connected; we don't care if
1538 the request itself succeeds or fails. */
1540 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1543 /* Open a connection to the remote board. */
1546 common_open (struct target_ops *ops, char *name, int from_tty,
1547 enum mips_monitor_type new_monitor,
1548 const char *new_monitor_prompt)
1550 char *serial_port_name;
1551 char *remote_name = 0;
1552 char *local_name = 0;
1554 struct cleanup *cleanup;
1558 To open a MIPS remote debugging connection, you need to specify what\n\
1559 serial device is attached to the target board (e.g., /dev/ttya).\n\
1560 If you want to use TFTP to download to the board, specify the name of a\n\
1561 temporary file to be used by GDB for downloads as the second argument.\n\
1562 This filename must be in the form host:filename, where host is the name\n\
1563 of the host running the TFTP server, and the file must be readable by the\n\
1564 world. If the local name of the temporary file differs from the name as\n\
1565 seen from the board via TFTP, specify that name as the third parameter.\n"));
1567 /* Parse the serial port name, the optional TFTP name, and the
1568 optional local TFTP name. */
1569 argv = gdb_buildargv (name);
1570 cleanup = make_cleanup_freeargv (argv);
1572 serial_port_name = xstrdup (argv[0]);
1573 if (argv[1]) /* Remote TFTP name specified? */
1575 remote_name = argv[1];
1576 if (argv[2]) /* Local TFTP filename specified? */
1577 local_name = argv[2];
1580 target_preopen (from_tty);
1583 unpush_target (current_ops);
1585 /* Open and initialize the serial port. */
1586 mips_desc = serial_open (serial_port_name);
1587 if (mips_desc == NULL)
1588 perror_with_name (serial_port_name);
1590 if (baud_rate != -1)
1592 if (serial_setbaudrate (mips_desc, baud_rate))
1594 serial_close (mips_desc);
1595 perror_with_name (serial_port_name);
1599 serial_raw (mips_desc);
1601 /* Open and initialize the optional download port. If it is in the form
1602 hostname#portnumber, it's a UDP socket. If it is in the form
1603 hostname:filename, assume it's the TFTP filename that must be
1604 passed to the DDB board to tell it where to get the load file. */
1607 if (strchr (remote_name, '#'))
1609 udp_desc = serial_open (remote_name);
1611 perror_with_name (_("Unable to open UDP port"));
1616 /* Save the remote and local names of the TFTP temp file. If
1617 the user didn't specify a local name, assume it's the same
1618 as the part of the remote name after the "host:". */
1622 xfree (tftp_localname);
1623 if (local_name == NULL)
1624 if ((local_name = strchr (remote_name, ':')) != NULL)
1625 local_name++; /* Skip over the colon. */
1626 if (local_name == NULL)
1627 local_name = remote_name; /* Local name same as remote name. */
1628 tftp_name = xstrdup (remote_name);
1629 tftp_localname = xstrdup (local_name);
1637 /* Reset the expected monitor prompt if it's never been set before. */
1638 if (mips_monitor_prompt == NULL)
1639 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1640 mips_monitor = new_monitor;
1645 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1647 /* Switch to using remote target now. */
1650 inferior_ptid = remote_mips_ptid;
1651 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1652 add_thread_silent (inferior_ptid);
1654 /* Try to figure out the processor model if possible. */
1655 deprecated_mips_set_processor_regs_hack ();
1657 /* This is really the job of start_remote however, that makes an
1658 assumption that the target is about to print out a status message
1659 of some sort. That doesn't happen here (in fact, it may not be
1660 possible to get the monitor to send the appropriate packet). */
1662 reinit_frame_cache ();
1663 registers_changed ();
1664 stop_pc = regcache_read_pc (get_current_regcache ());
1665 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
1666 xfree (serial_port_name);
1668 do_cleanups (cleanup);
1671 /* Open a connection to an IDT board. */
1674 mips_open (char *name, int from_tty)
1676 const char *monitor_prompt = NULL;
1677 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1678 && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips)
1680 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach)
1682 case bfd_mach_mips4100:
1683 case bfd_mach_mips4300:
1684 case bfd_mach_mips4600:
1685 case bfd_mach_mips4650:
1686 case bfd_mach_mips5000:
1687 monitor_prompt = "<RISQ> ";
1691 if (monitor_prompt == NULL)
1692 monitor_prompt = "<IDT>";
1693 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1696 /* Open a connection to a PMON board. */
1699 pmon_open (char *name, int from_tty)
1701 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1704 /* Open a connection to a DDB board. */
1707 ddb_open (char *name, int from_tty)
1709 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1712 /* Open a connection to a rockhopper board. */
1715 rockhopper_open (char *name, int from_tty)
1717 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1720 /* Open a connection to an LSI board. */
1723 lsi_open (char *name, int from_tty)
1727 /* Clear the LSI breakpoint table. */
1728 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1729 lsi_breakpoints[i].type = BREAK_UNUSED;
1731 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1734 /* Close a connection to the remote board. */
1737 mips_close (struct target_ops *self)
1741 /* Get the board out of remote debugging mode. */
1742 (void) mips_exit_debug ();
1747 generic_mourn_inferior ();
1750 /* Detach from the remote board. */
1753 mips_detach (struct target_ops *ops, const char *args, int from_tty)
1756 error (_("Argument given to \"detach\" when remotely debugging."));
1758 unpush_target (ops);
1761 printf_unfiltered ("Ending remote MIPS debugging.\n");
1764 /* Tell the target board to resume. This does not wait for a reply
1765 from the board, except in the case of single-stepping on LSI boards,
1766 where PMON does return a reply. */
1769 mips_resume (struct target_ops *ops,
1770 ptid_t ptid, int step, enum gdb_signal siggnal)
1774 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1775 a single step, so we wait for that. */
1776 mips_request (step ? 's' : 'c', 1, siggnal,
1777 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1778 mips_receive_wait, NULL);
1781 /* Return the signal corresponding to SIG, where SIG is the number which
1782 the MIPS protocol uses for the signal. */
1784 static enum gdb_signal
1785 mips_signal_from_protocol (int sig)
1787 /* We allow a few more signals than the IDT board actually returns, on
1788 the theory that there is at least *some* hope that perhaps the numbering
1789 for these signals is widely agreed upon. */
1792 return GDB_SIGNAL_UNKNOWN;
1794 /* Don't want to use gdb_signal_from_host because we are converting
1795 from MIPS signal numbers, not host ones. Our internal numbers
1796 match the MIPS numbers for the signals the board can return, which
1797 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1798 return (enum gdb_signal) sig;
1801 /* Set the register designated by REGNO to the value designated by VALUE. */
1804 mips_set_register (int regno, ULONGEST value)
1806 gdb_byte buf[MAX_REGISTER_SIZE];
1807 struct regcache *regcache = get_current_regcache ();
1808 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1809 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1811 /* We got the number the register holds, but gdb expects to see a
1812 value in the target byte ordering. */
1814 if (mips_monitor != MON_ROCKHOPPER
1815 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1816 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1817 In such cases we can only really debug 32-bit code properly so,
1818 when reading a GPR or the PC, assume that the full 64-bit
1819 value is the sign extension of the lower 32 bits. */
1820 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1823 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1826 regcache_raw_supply (regcache, regno, buf);
1829 /* Wait until the remote stops, and return a wait status. */
1832 mips_wait (struct target_ops *ops,
1833 ptid_t ptid, struct target_waitstatus *status, int options)
1837 char buff[DATA_MAXLEN];
1838 ULONGEST rpc, rfp, rsp;
1839 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1842 interrupt_count = 0;
1845 /* If we have not sent a single step or continue command, then the
1846 board is waiting for us to do something. Return a status
1847 indicating that it is stopped. */
1848 if (!mips_need_reply)
1850 status->kind = TARGET_WAITKIND_STOPPED;
1851 status->value.sig = GDB_SIGNAL_TRAP;
1852 return inferior_ptid;
1855 /* No timeout; we sit here as long as the program continues to execute. */
1857 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1860 mips_error (_("Remote failure: %s"), safe_strerror (errno));
1862 /* On returning from a continue, the PMON monitor seems to start
1863 echoing back the messages we send prior to sending back the
1864 ACK. The code can cope with this, but to try and avoid the
1865 unnecessary serial traffic, and "spurious" characters displayed
1866 to the user, we cheat and reset the debug protocol. The problems
1867 seems to be caused by a check on the number of arguments, and the
1868 command length, within the monitor causing it to echo the command
1870 if (mips_monitor == MON_PMON)
1873 mips_enter_debug ();
1876 /* See if we got back extended status. If so, pick out the pc, fp,
1879 nfields = sscanf (buff,
1880 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1881 pc_string, fp_string, sp_string, flags);
1883 && read_hex_value (pc_string, &rpc)
1884 && read_hex_value (fp_string, &rfp)
1885 && read_hex_value (sp_string, &rsp))
1887 struct regcache *regcache = get_current_regcache ();
1888 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1890 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1891 mips_set_register (30, rfp);
1892 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1898 for (i = 0; i <= 2; i++)
1899 if (flags[i] == 'r' || flags[i] == 'w')
1901 else if (flags[i] == '\000')
1906 if (strcmp (target_shortname, "lsi") == 0)
1909 /* If this is an LSI PMON target, see if we just hit a
1910 hardrdware watchpoint. Right now, PMON doesn't give us
1911 enough information to determine which breakpoint we hit. So
1912 we have to look up the PC in our own table of breakpoints,
1913 and if found, assume it's just a normal instruction fetch
1914 breakpoint, not a data watchpoint. FIXME when PMON provides
1915 some way to tell us what type of breakpoint it is. */
1917 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1920 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1922 if (lsi_breakpoints[i].addr == pc
1923 && lsi_breakpoints[i].type == BREAK_FETCH)
1930 /* If a data breakpoint was hit, PMON returns the following packet:
1932 The return packet from an ordinary breakpoint doesn't have the
1933 extra 0x01 field tacked onto the end. */
1934 if (nfields == 1 && rpc == 1)
1939 /* NOTE: The following (sig) numbers are defined by PMON:
1940 SPP_SIGTRAP 5 breakpoint
1948 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1949 and so on, because the constants we want here are determined by the
1950 MIPS protocol and have nothing to do with what host we are running on. */
1951 if ((rstatus & 0xff) == 0)
1953 status->kind = TARGET_WAITKIND_EXITED;
1954 status->value.integer = (((rstatus) >> 8) & 0xff);
1956 else if ((rstatus & 0xff) == 0x7f)
1958 status->kind = TARGET_WAITKIND_STOPPED;
1959 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1961 /* If the stop PC is in the _exit function, assume
1962 we hit the 'break 0x3ff' instruction in _exit, so this
1963 is not a normal breakpoint. */
1964 if (strcmp (target_shortname, "lsi") == 0)
1966 const char *func_name;
1967 CORE_ADDR func_start;
1968 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1970 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1971 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1972 && func_start == pc)
1973 status->kind = TARGET_WAITKIND_EXITED;
1978 status->kind = TARGET_WAITKIND_SIGNALLED;
1979 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1982 return inferior_ptid;
1985 /* We have to map between the register numbers used by gdb and the
1986 register numbers used by the debugging protocol. */
1988 #define REGNO_OFFSET 96
1991 mips_map_regno (struct gdbarch *gdbarch, int regno)
1995 if (regno >= mips_regnum (gdbarch)->fp0
1996 && regno < mips_regnum (gdbarch)->fp0 + 32)
1997 return regno - mips_regnum (gdbarch)->fp0 + 32;
1998 else if (regno == mips_regnum (gdbarch)->pc)
1999 return REGNO_OFFSET + 0;
2000 else if (regno == mips_regnum (gdbarch)->cause)
2001 return REGNO_OFFSET + 1;
2002 else if (regno == mips_regnum (gdbarch)->hi)
2003 return REGNO_OFFSET + 2;
2004 else if (regno == mips_regnum (gdbarch)->lo)
2005 return REGNO_OFFSET + 3;
2006 else if (regno == mips_regnum (gdbarch)->fp_control_status)
2007 return REGNO_OFFSET + 4;
2008 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
2009 return REGNO_OFFSET + 5;
2011 /* FIXME: Is there a way to get the status register? */
2015 /* Fetch the remote registers. */
2018 mips_fetch_registers (struct target_ops *ops,
2019 struct regcache *regcache, int regno)
2021 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2022 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2028 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2029 mips_fetch_registers (ops, regcache, regno);
2033 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2034 || regno == MIPS_ZERO_REGNUM)
2035 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2036 supposed to read zero (see also mips-nat.c). */
2040 /* If PMON doesn't support this register, don't waste serial
2041 bandwidth trying to read it. */
2042 int pmon_reg = mips_map_regno (gdbarch, regno);
2044 if (regno != 0 && pmon_reg == 0)
2048 /* Unfortunately the PMON version in the Vr4300 board has been
2049 compiled without the 64bit register access commands. This
2050 means we cannot get hold of the full register width. */
2051 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2052 val = mips_request ('t', pmon_reg, 0,
2053 &err, mips_receive_wait, NULL);
2055 val = mips_request ('r', pmon_reg, 0,
2056 &err, mips_receive_wait, NULL);
2058 mips_error (_("Can't read register %d: %s"), regno,
2059 safe_strerror (errno));
2063 mips_set_register (regno, val);
2066 /* Prepare to store registers. The MIPS protocol can store individual
2067 registers, so this function doesn't have to do anything. */
2070 mips_prepare_to_store (struct target_ops *self, struct regcache *regcache)
2074 /* Store remote register(s). */
2077 mips_store_registers (struct target_ops *ops,
2078 struct regcache *regcache, int regno)
2080 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2086 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2087 mips_store_registers (ops, regcache, regno);
2091 regcache_cooked_read_unsigned (regcache, regno, &val);
2092 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2093 mips_map_regno (gdbarch, regno),
2095 &err, mips_receive_wait, NULL);
2097 mips_error (_("Can't write register %d: %s"), regno,
2098 safe_strerror (errno));
2101 /* Fetch a word from the target board. Return word fetched in location
2102 addressed by VALP. Return 0 when successful; return positive error
2106 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2110 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2113 /* Data space failed; try instruction space. */
2114 *valp = mips_request ('i', addr, 0, &err,
2115 mips_receive_wait, NULL);
2120 /* Store a word to the target board. Returns errno code or zero for
2121 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2122 memory location there. */
2124 /* FIXME! make sure only 32-bit quantities get stored! */
2126 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2129 unsigned int oldcontents;
2131 oldcontents = mips_request ('D', addr, val, &err,
2132 mips_receive_wait, NULL);
2135 /* Data space failed; try instruction space. */
2136 oldcontents = mips_request ('I', addr, val, &err,
2137 mips_receive_wait, NULL);
2141 if (old_contents != NULL)
2142 *old_contents = oldcontents;
2146 /* Helper for mips_xfer_partial that handles memory transfers.
2147 Arguments are like target_xfer_partial. Note that the protocol
2148 gives us the correct value for a longword, since it transfers
2149 values in ASCII. We want the byte values, so we have to swap the
2152 static int mask_address_p = 1;
2154 static enum target_xfer_status
2155 mips_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
2156 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
2158 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
2165 /* PMON targets do not cope well with 64 bit addresses. Mask the
2166 value down to 32 bits. */
2168 memaddr &= (CORE_ADDR) 0xffffffff;
2170 /* Round starting address down to longword boundary. */
2171 addr = memaddr & ~3;
2172 /* Round ending address up; get number of longwords that makes. */
2173 count = (((memaddr + len) - addr) + 3) / 4;
2174 /* Allocate buffer of that many longwords. */
2175 buffer = alloca (count * 4);
2177 if (writebuf != NULL)
2179 /* Fill start and end extra bytes of buffer with existing data. */
2180 if (addr != memaddr || len < 4)
2184 if (mips_fetch_word (addr, &val))
2185 return TARGET_XFER_E_IO;
2187 /* Need part of initial word -- fetch it. */
2188 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2195 /* Need part of last word -- fetch it. FIXME: we do this even
2196 if we don't need it. */
2197 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2198 return TARGET_XFER_E_IO;
2200 store_unsigned_integer (&buffer[(count - 1) * 4],
2201 4, byte_order, val);
2204 /* Copy data to be written over corresponding part of buffer. */
2206 memcpy ((char *) buffer + (memaddr & 3), writebuf, len);
2208 /* Write the entire buffer. */
2210 for (i = 0; i < count; i++, addr += 4)
2214 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2215 status = mips_store_word (addr, word, NULL);
2216 /* Report each kilobyte (we download 32-bit words at a time). */
2219 printf_unfiltered ("*");
2220 gdb_flush (gdb_stdout);
2223 return TARGET_XFER_E_IO;
2224 /* FIXME: Do we want a QUIT here? */
2227 printf_unfiltered ("\n");
2231 /* Read all the longwords. */
2232 for (i = 0; i < count; i++, addr += 4)
2236 if (mips_fetch_word (addr, &val))
2237 return TARGET_XFER_E_IO;
2239 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2243 /* Copy appropriate bytes out of the buffer. */
2244 memcpy (readbuf, buffer + (memaddr & 3), len);
2249 /* Target to_xfer_partial implementation. */
2251 static enum target_xfer_status
2252 mips_xfer_partial (struct target_ops *ops, enum target_object object,
2253 const char *annex, gdb_byte *readbuf,
2254 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
2255 ULONGEST *xfered_len)
2259 case TARGET_OBJECT_MEMORY:
2260 return mips_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
2263 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2264 readbuf, writebuf, offset, len,
2269 /* Print info on this target. */
2272 mips_files_info (struct target_ops *ignore)
2274 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2277 /* Kill the process running on the board. This will actually only
2278 work if we are doing remote debugging over the console input. I
2279 think that if IDT/sim had the remote debug interrupt enabled on the
2280 right port, we could interrupt the process with a break signal. */
2283 mips_kill (struct target_ops *ops)
2285 if (!mips_wait_flag)
2287 target_mourn_inferior ();
2293 if (interrupt_count >= 2)
2295 interrupt_count = 0;
2297 target_terminal_ours ();
2299 if (query (_("Interrupted while waiting for the program.\n\
2300 Give up (and stop debugging it)? ")))
2302 /* Clean up in such a way that mips_close won't try to talk
2303 to the board (it almost surely won't work since we
2304 weren't able to talk to it). */
2308 printf_unfiltered ("Ending remote MIPS debugging.\n");
2309 target_mourn_inferior ();
2313 target_terminal_inferior ();
2316 if (remote_debug > 0)
2317 printf_unfiltered ("Sending break\n");
2319 serial_send_break (mips_desc);
2321 target_mourn_inferior ();
2330 serial_write (mips_desc, &cc, 1);
2332 target_mourn_inferior ();
2337 /* Start running on the target board. */
2340 mips_create_inferior (struct target_ops *ops, char *execfile,
2341 char *args, char **env, int from_tty)
2348 Can't pass arguments to remote MIPS board; arguments ignored."));
2349 /* And don't try to use them on the next "run" command. */
2350 execute_command ("set args", 0);
2353 if (execfile == 0 || exec_bfd == 0)
2354 error (_("No executable file specified"));
2356 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2358 init_wait_for_inferior ();
2360 regcache_write_pc (get_current_regcache (), entry_pt);
2363 /* Clean up after a process. The bulk of the work is done in mips_close(),
2364 which is called when unpushing the target. */
2367 mips_mourn_inferior (struct target_ops *ops)
2369 if (current_ops != NULL)
2370 unpush_target (current_ops);
2373 /* We can write a breakpoint and read the shadow contents in one
2376 /* Insert a breakpoint. On targets that don't have built-in
2377 breakpoint support, we read the contents of the target location and
2378 stash it, then overwrite it with a breakpoint instruction. ADDR is
2379 the target location in the target machine. BPT is the breakpoint
2380 being inserted or removed, which contains memory for saving the
2384 mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2385 struct bp_target_info *bp_tgt)
2387 if (monitor_supports_breakpoints)
2388 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2391 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
2394 /* Remove a breakpoint. */
2397 mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2398 struct bp_target_info *bp_tgt)
2400 if (monitor_supports_breakpoints)
2401 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2404 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
2407 /* Tell whether this target can support a hardware breakpoint. CNT
2408 is the number of hardware breakpoints already installed. This
2409 implements the target_can_use_hardware_watchpoint macro. */
2412 mips_can_use_watchpoint (struct target_ops *self,
2413 int type, int cnt, int othertype)
2415 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2419 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2420 This is used for memory ref breakpoints. */
2422 static unsigned long
2423 calculate_mask (CORE_ADDR addr, int len)
2428 mask = addr ^ (addr + len - 1);
2430 for (i = 32; i >= 0; i--)
2436 mask = (unsigned long) 0xffffffff >> i;
2442 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2443 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2447 mips_insert_watchpoint (struct target_ops *self,
2448 CORE_ADDR addr, int len, int type,
2449 struct expression *cond)
2451 if (mips_set_breakpoint (addr, len, type))
2457 /* Remove a watchpoint. */
2460 mips_remove_watchpoint (struct target_ops *self,
2461 CORE_ADDR addr, int len, int type,
2462 struct expression *cond)
2464 if (mips_clear_breakpoint (addr, len, type))
2470 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2474 mips_stopped_by_watchpoint (struct target_ops *ops)
2476 return hit_watchpoint;
2480 /* Insert a breakpoint. */
2483 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2485 return mips_common_breakpoint (1, addr, len, type);
2489 /* Clear a breakpoint. */
2492 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2494 return mips_common_breakpoint (0, addr, len, type);
2498 /* Check the error code from the return packet for an LSI breakpoint
2499 command. If there's no error, just return 0. If it's a warning,
2500 print the warning text and return 0. If it's an error, print
2501 the error text and return 1. <ADDR> is the address of the breakpoint
2502 that was being set. <RERRFLG> is the error code returned by PMON.
2503 This is a helper function for mips_common_breakpoint. */
2506 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2508 struct lsi_error *err;
2509 const char *saddr = paddress (target_gdbarch (), addr);
2511 if (rerrflg == 0) /* no error */
2514 /* Warnings can be ORed together, so check them all. */
2515 if (rerrflg & W_WARN)
2517 if (monitor_warnings)
2521 for (err = lsi_warning_table; err->code != 0; err++)
2523 if ((err->code & rerrflg) == err->code)
2526 fprintf_unfiltered (gdb_stderr, "\
2527 mips_common_breakpoint (%s): Warning: %s\n",
2533 fprintf_unfiltered (gdb_stderr, "\
2534 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2541 /* Errors are unique, i.e. can't be ORed together. */
2542 for (err = lsi_error_table; err->code != 0; err++)
2544 if ((err->code & rerrflg) == err->code)
2546 fprintf_unfiltered (gdb_stderr, "\
2547 mips_common_breakpoint (%s): Error: %s\n",
2553 fprintf_unfiltered (gdb_stderr, "\
2554 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2561 /* This routine sends a breakpoint command to the remote target.
2563 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2564 <ADDR> is the address of the breakpoint.
2565 <LEN> the length of the region to break on.
2566 <TYPE> is the type of breakpoint:
2567 0 = write (BREAK_WRITE)
2568 1 = read (BREAK_READ)
2569 2 = read/write (BREAK_ACCESS)
2570 3 = instruction fetch (BREAK_FETCH)
2572 Return 0 if successful; otherwise 1. */
2575 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2577 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
2578 char buf[DATA_MAXLEN + 1];
2580 int rpid, rerrflg, rresponse, rlen;
2583 addr = gdbarch_addr_bits_remove (target_gdbarch (), addr);
2585 if (mips_monitor == MON_LSI)
2587 if (set == 0) /* clear breakpoint */
2589 /* The LSI PMON "clear breakpoint" has this form:
2590 <pid> 'b' <bptn> 0x0
2592 <pid> 'b' 0x0 <code>
2594 <bptn> is a breakpoint number returned by an earlier 'B' command.
2595 Possible return codes: OK, E_BPT. */
2599 /* Search for the breakpoint in the table. */
2600 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2601 if (lsi_breakpoints[i].type == type
2602 && lsi_breakpoints[i].addr == addr
2603 && lsi_breakpoints[i].len == len)
2606 /* Clear the table entry and tell PMON to clear the breakpoint. */
2607 if (i == MAX_LSI_BREAKPOINTS)
2610 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2611 paddress (target_gdbarch (), addr));
2615 lsi_breakpoints[i].type = BREAK_UNUSED;
2616 sprintf (buf, "0x0 b 0x%x 0x0", i);
2617 mips_send_packet (buf, 1);
2619 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2622 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2624 mips_error (_("mips_common_breakpoint: "
2625 "Bad response from remote board: %s"),
2628 return (mips_check_lsi_error (addr, rerrflg));
2631 /* set a breakpoint */
2633 /* The LSI PMON "set breakpoint" command has this form:
2634 <pid> 'B' <addr> 0x0
2636 <pid> 'B' <bptn> <code>
2638 The "set data breakpoint" command has this form:
2640 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2642 where: type= "0x1" = read
2644 "0x3" = access (read or write)
2646 The reply returns two values:
2647 bptn - a breakpoint number, which is a small integer with
2648 possible values of zero through 255.
2649 code - an error return code, a value of zero indicates a
2650 succesful completion, other values indicate various
2651 errors and warnings.
2653 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2655 if (type == BREAK_FETCH) /* instruction breakpoint */
2658 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2664 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2665 phex_nz (addr, addr_size),
2666 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2667 phex_nz (addr + len - 1, addr_size));
2669 mips_send_packet (buf, 1);
2671 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2674 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2675 &rpid, &rcmd, &rresponse, &rerrflg);
2676 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2677 mips_error (_("mips_common_breakpoint: "
2678 "Bad response from remote board: %s"),
2682 if (mips_check_lsi_error (addr, rerrflg))
2685 /* rresponse contains PMON's breakpoint number. Record the
2686 information for this breakpoint so we can clear it later. */
2687 lsi_breakpoints[rresponse].type = type;
2688 lsi_breakpoints[rresponse].addr = addr;
2689 lsi_breakpoints[rresponse].len = len;
2696 /* On non-LSI targets, the breakpoint command has this form:
2697 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2698 <MASK> is a don't care mask for addresses.
2699 <FLAGS> is any combination of `r', `w', or `f' for
2700 read/write/fetch. */
2704 mask = calculate_mask (addr, len);
2707 if (set) /* set a breakpoint */
2713 case BREAK_WRITE: /* write */
2716 case BREAK_READ: /* read */
2719 case BREAK_ACCESS: /* read/write */
2722 case BREAK_FETCH: /* fetch */
2726 internal_error (__FILE__, __LINE__,
2727 _("failed internal consistency check"));
2731 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2732 phex_nz (mask, addr_size), flags);
2737 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2740 mips_send_packet (buf, 1);
2742 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2745 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2746 &rpid, &rcmd, &rerrflg, &rresponse);
2748 if (nfields != 4 || rcmd != cmd)
2749 mips_error (_("mips_common_breakpoint: "
2750 "Bad response from remote board: %s"),
2755 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2756 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2757 if (mips_monitor == MON_DDB)
2758 rresponse = rerrflg;
2759 if (rresponse != 22) /* invalid argument */
2760 fprintf_unfiltered (gdb_stderr, "\
2761 mips_common_breakpoint (%s): Got error: 0x%x\n",
2762 paddress (target_gdbarch (), addr), rresponse);
2769 /* Send one S record as specified by SREC of length LEN, starting
2770 at ADDR. Note, however, that ADDR is not used except to provide
2771 a useful message to the user in the event that a NACK is received
2775 send_srec (char *srec, int len, CORE_ADDR addr)
2781 serial_write (mips_desc, srec, len);
2783 ch = mips_readchar (remote_timeout);
2787 case SERIAL_TIMEOUT:
2788 error (_("Timeout during download."));
2792 case 0x15: /* NACK */
2793 fprintf_unfiltered (gdb_stderr,
2794 "Download got a NACK at byte %s! Retrying.\n",
2795 paddress (target_gdbarch (), addr));
2798 error (_("Download got unexpected ack char: 0x%x, retrying."),
2804 /* Download a binary file by converting it to S records. */
2807 mips_load_srec (char *args)
2814 unsigned int srec_frame = 200;
2816 struct cleanup *cleanup;
2817 static int hashmark = 1;
2819 buffer = alloca (srec_frame * 2 + 256);
2821 abfd = gdb_bfd_open (args, NULL, -1);
2824 printf_filtered ("Unable to open file %s\n", args);
2828 cleanup = make_cleanup_bfd_unref (abfd);
2829 if (bfd_check_format (abfd, bfd_object) == 0)
2831 printf_filtered ("File is not an object file\n");
2832 do_cleanups (cleanup);
2836 /* This actually causes a download in the IDT binary format: */
2837 mips_send_command (LOAD_CMD, 0);
2839 for (s = abfd->sections; s; s = s->next)
2841 if (s->flags & SEC_LOAD)
2843 unsigned int numbytes;
2845 /* FIXME! vma too small????? */
2846 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2848 (long) (s->vma + bfd_get_section_size (s)));
2849 gdb_flush (gdb_stdout);
2851 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2853 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2855 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2857 reclen = mips_make_srec (srec, '3', s->vma + i,
2859 send_srec (srec, reclen, s->vma + i);
2861 if (deprecated_ui_load_progress_hook)
2862 deprecated_ui_load_progress_hook (s->name, i);
2866 putchar_unfiltered ('#');
2867 gdb_flush (gdb_stdout);
2870 } /* Per-packet (or S-record) loop */
2872 putchar_unfiltered ('\n');
2873 } /* Loadable sections */
2876 putchar_unfiltered ('\n');
2878 /* Write a type 7 terminator record. no data for a type 7, and there
2879 is no data, so len is 0. */
2881 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2883 send_srec (srec, reclen, abfd->start_address);
2885 serial_flush_input (mips_desc);
2886 do_cleanups (cleanup);
2890 * mips_make_srec -- make an srecord. This writes each line, one at a
2891 * time, each with it's own header and trailer line.
2892 * An srecord looks like this:
2894 * byte count-+ address
2895 * start ---+ | | data +- checksum
2897 * S01000006F6B692D746573742E73726563E4
2898 * S315000448600000000000000000FC00005900000000E9
2899 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2900 * S30B0004485A0000000000004E
2903 * S<type><length><address><data><checksum>
2907 * is the number of bytes following upto the checksum. Note that
2908 * this is not the number of chars following, since it takes two
2909 * chars to represent a byte.
2913 * 1) two byte address data record
2914 * 2) three byte address data record
2915 * 3) four byte address data record
2916 * 7) four byte address termination record
2917 * 8) three byte address termination record
2918 * 9) two byte address termination record
2921 * is the start address of the data following, or in the case of
2922 * a termination record, the start address of the image
2926 * is the sum of all the raw byte data in the record, from the length
2927 * upwards, modulo 256 and subtracted from 255.
2929 * This routine returns the length of the S-record.
2934 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2937 unsigned char checksum;
2940 /* Create the header for the srec. addr_size is the number of bytes
2941 in the address, and 1 is the number of bytes in the count. */
2943 /* FIXME!! bigger buf required for 64-bit! */
2946 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2947 /* This assumes S3 style downloads (4byte addresses). There should
2948 probably be a check, or the code changed to make it more
2950 buf[3] = memaddr >> 24;
2951 buf[4] = memaddr >> 16;
2952 buf[5] = memaddr >> 8;
2954 memcpy (&buf[7], myaddr, len);
2956 /* Note that the checksum is calculated on the raw data, not the
2957 hexified data. It includes the length, address and the data
2958 portions of the packet. */
2960 buf += 2; /* Point at length byte. */
2961 for (i = 0; i < len + 4 + 1; i++)
2969 /* The following manifest controls whether we enable the simple flow
2970 control support provided by the monitor. If enabled the code will
2971 wait for an affirmative ACK between transmitting packets. */
2972 #define DOETXACK (1)
2974 /* The PMON fast-download uses an encoded packet format constructed of
2975 3byte data packets (encoded as 4 printable ASCII characters), and
2976 escape sequences (preceded by a '/'):
2979 'C' compare checksum (12bit value, not included in checksum calculation)
2980 'S' define symbol name (for addr) terminated with ","
2981 and padded to 4char boundary
2982 'Z' zero fill multiple of 3bytes
2983 'B' byte (12bit encoded value, of 8bit data)
2984 'A' address (36bit encoded value)
2985 'E' define entry as original address, and exit load
2987 The packets are processed in 4 character chunks, so the escape
2988 sequences that do not have any data (or variable length data)
2989 should be padded to a 4 character boundary. The decoder will give
2990 an error if the complete message block size is not a multiple of
2991 4bytes (size of record).
2993 The encoding of numbers is done in 6bit fields. The 6bit value is
2994 used to index into this string to get the specific character
2995 encoding for the value: */
2996 static char encoding[] =
2997 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2999 /* Convert the number of bits required into an encoded number, 6bits
3000 at a time (range 0..63). Keep a checksum if required (passed
3001 pointer non-NULL). The function returns the number of encoded
3002 characters written into the buffer. */
3005 pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum)
3007 int count = (n / 6);
3011 fprintf_unfiltered (gdb_stderr,
3012 "Fast encoding bitcount must be a "
3013 "multiple of 12bits: %dbit%s\n",
3014 n, (n == 1) ? "" : "s");
3019 fprintf_unfiltered (gdb_stderr,
3020 "Fast encoding cannot process more "
3021 "than 36bits at the moment: %dbits\n", n);
3025 /* Deal with the checksum: */
3031 *chksum += ((v >> 24) & 0xFFF);
3033 *chksum += ((v >> 12) & 0xFFF);
3035 *chksum += ((v >> 0) & 0xFFF);
3042 *p++ = encoding[(v >> n) & 0x3F];
3049 /* Shorthand function (that could be in-lined) to output the zero-fill
3050 escape sequence into the data stream. */
3053 pmon_zeroset (int recsize, char **buff,
3054 unsigned int *amount, unsigned int *chksum)
3058 sprintf (*buff, "/Z");
3059 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3060 *buff += (count + 2);
3062 return (recsize + count + 2);
3065 /* Add the checksum specified by *VALUE to end of the record under
3066 construction. *BUF specifies the location at which to begin
3067 writing characters comprising the checksum information. RECSIZE
3068 specifies the size of the record constructed thus far. (A trailing
3069 NUL character may be present in the buffer holding the record, but
3070 the record size does not include this character.)
3072 Return the total size of the record after adding the checksum escape,
3073 the checksum itself, and the trailing newline.
3075 The checksum specified by *VALUE is zeroed out prior to returning.
3076 Additionally, *BUF is updated to refer to the location just beyond
3077 the record elements added by this call. */
3080 pmon_checkset (int recsize, char **buff, unsigned int *value)
3084 /* Add the checksum (without updating the value): */
3085 sprintf (*buff, "/C");
3086 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3087 *buff += (count + 2);
3088 sprintf (*buff, "\n");
3089 *buff += 2; /* Include zero terminator. */
3090 /* Forcing a checksum validation clears the sum: */
3092 return (recsize + count + 3);
3095 /* Amount of padding we leave after at the end of the output buffer,
3096 for the checksum and line termination characters: */
3097 #define CHECKSIZE (4 + 4 + 4 + 2)
3098 /* zero-fill, checksum, transfer end and line termination space. */
3100 /* The amount of binary data loaded from the object file in a single
3102 #define BINCHUNK (1024)
3104 /* Maximum line of data accepted by the monitor: */
3105 #define MAXRECSIZE (550)
3106 /* NOTE: This constant depends on the monitor being used. This value
3107 is for PMON 5.x on the Cogent Vr4300 board. */
3109 /* Create a FastLoad format record.
3111 *OUTBUF is the buffer into which a FastLoad formatted record is
3112 written. On return, the pointer position represented by *OUTBUF
3113 is updated to point at the end of the data, i.e. the next position
3114 in the buffer that may be written. No attempt is made to NUL-
3115 terminate this portion of the record written to the buffer.
3117 INBUF contains the binary input data from which the FastLoad
3118 formatted record will be built. *INPTR is an index into this
3119 buffer. *INPTR is updated as the input is consumed. Thus, on
3120 return, the caller has access to the position of the next input
3121 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3124 *RECSIZE will be written with the size of the record written to the
3125 output buffer prior to returning. This size does not include a
3126 NUL-termination byte as none is written to the output buffer.
3128 *CSUM is the output buffer checksum. It is updated as data is
3129 written to the output buffer.
3131 *ZEROFILL is the current number of 3-byte zero sequences that have
3132 been encountered. It is both an input and an output to this
3136 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3137 int inamount, int *recsize, unsigned int *csum,
3138 unsigned int *zerofill)
3143 /* This is a simple check to ensure that our data will fit within
3144 the maximum allowable record size. Each record output is 4bytes
3145 in length. We must allow space for a pending zero fill command,
3146 the record, and a checksum record. */
3147 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3149 /* Process the binary data: */
3150 if ((inamount - *inptr) < 3)
3153 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3155 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3157 *recsize += (2 + count);
3162 unsigned int value = ((inbuf[*inptr + 0] << 16)
3163 | (inbuf[*inptr + 1] << 8)
3164 | (inbuf[*inptr + 2]));
3166 /* Simple check for zero data. TODO: A better check would be
3167 to check the last, and then the middle byte for being zero
3168 (if the first byte is not). We could then check for
3169 following runs of zeros, and if above a certain size it is
3170 worth the 4 or 8 character hit of the byte insertions used
3171 to pad to the start of the zeroes. NOTE: This also depends
3172 on the alignment at the end of the zero run. */
3173 if (value == 0x00000000)
3176 if (*zerofill == 0xFFF) /* 12bit counter */
3177 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3182 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3183 count = pmon_makeb64 (value, p, 24, csum);
3195 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3196 output the message specified by MESG. Return -1 for failure, 0
3200 pmon_check_ack (char *mesg)
3202 #if defined(DOETXACK)
3207 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3209 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3211 fprintf_unfiltered (gdb_stderr,
3212 "Failed to receive valid ACK for %s\n", mesg);
3213 return (-1); /* Terminate the download. */
3216 #endif /* DOETXACK */
3220 /* pmon_download - Send a sequence of characters to the PMON download port,
3221 which is either a serial port or a UDP socket. */
3224 pmon_start_download (void)
3228 /* Create the temporary download file. */
3229 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3230 perror_with_name (tftp_localname);
3234 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3235 mips_expect ("Downloading from ");
3236 mips_expect (udp_in_use ? "udp" : "tty0");
3237 mips_expect (", ^C to abort\r\n");
3241 /* Look for the string specified by STRING sent from the target board
3242 during a download operation. If the string in question is not
3243 seen, output an error message, remove the temporary file, if
3244 appropriate, and return 0. Otherwise, return 1 to indicate
3248 mips_expect_download (char *string)
3250 if (!mips_expect (string))
3252 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3254 remove (tftp_localname); /* Remove temporary file. */
3261 /* Look for messages from the target board associated with the entry
3264 NOTE: This function doesn't indicate success or failure, so we
3265 have no way to determine whether or not the output from the board
3266 was correctly seen. However, given that other items are checked
3267 after this, it seems unlikely that those checks will pass if this
3268 check doesn't first (silently) pass. */
3271 pmon_check_entry_address (char *entry_address, int final)
3273 char hexnumber[9]; /* Includes '\0' space. */
3275 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3276 sprintf (hexnumber, "%x", final);
3277 mips_expect (hexnumber);
3278 mips_expect ("\r\n");
3281 /* Look for messages from the target board showing the total number of
3282 bytes downloaded to the board. Output 1 for success if the tail
3283 end of the message was read correctly, 0 otherwise. */
3286 pmon_check_total (int bintotal)
3288 char hexnumber[9]; /* Includes '\0' space. */
3290 mips_expect ("\r\ntotal = 0x");
3291 sprintf (hexnumber, "%x", bintotal);
3292 mips_expect (hexnumber);
3293 return mips_expect_download (" bytes\r\n");
3296 /* Look for the termination messages associated with the end of
3297 a download to the board.
3299 Also, when `tftp_in_use' is set, issue the load command to the
3300 board causing the file to be transferred. (This is done prior
3301 to looking for the above mentioned termination messages.) */
3304 pmon_end_download (int final, int bintotal)
3306 char hexnumber[9]; /* Includes '\0' space. */
3310 static char *load_cmd_prefix = "load -b -s ";
3314 /* Close off the temporary file containing the load data. */
3318 /* Make the temporary file readable by the world. */
3319 if (stat (tftp_localname, &stbuf) == 0)
3320 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3322 /* Must reinitialize the board to prevent PMON from crashing. */
3323 if (mips_monitor != MON_ROCKHOPPER)
3324 mips_send_command ("initEther\r", -1);
3326 /* Send the load command. */
3327 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3328 strcpy (cmd, load_cmd_prefix);
3329 strcat (cmd, tftp_name);
3331 mips_send_command (cmd, 0);
3333 if (!mips_expect_download ("Downloading from "))
3335 if (!mips_expect_download (tftp_name))
3337 if (!mips_expect_download (", ^C to abort\r\n"))
3341 /* Wait for the stuff that PMON prints after the load has completed.
3342 The timeout value for use in the tftp case (15 seconds) was picked
3343 arbitrarily but might be too small for really large downloads. FIXME. */
3344 switch (mips_monitor)
3347 pmon_check_ack ("termination");
3348 pmon_check_entry_address ("Entry address is ", final);
3349 if (!pmon_check_total (bintotal))
3352 case MON_ROCKHOPPER:
3353 if (!pmon_check_total (bintotal))
3355 pmon_check_entry_address ("Entry Address = ", final);
3358 pmon_check_entry_address ("Entry Address = ", final);
3359 pmon_check_ack ("termination");
3360 if (!pmon_check_total (bintotal))
3366 remove (tftp_localname); /* Remove temporary file. */
3369 /* Write the buffer specified by BUFFER of length LENGTH to either
3370 the board or the temporary file that'll eventually be transferred
3374 pmon_download (char *buffer, int length)
3380 written = fwrite (buffer, 1, length, tftp_file);
3381 if (written < length)
3382 perror_with_name (tftp_localname);
3385 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3388 /* Open object or executable file, FILE, and send it to the board
3389 using the FastLoad format. */
3392 pmon_load_fast (char *file)
3396 unsigned char *binbuf;
3399 unsigned int csum = 0;
3400 int hashmark = !tftp_in_use;
3404 struct cleanup *cleanup;
3406 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3407 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3409 abfd = gdb_bfd_open (file, NULL, -1);
3412 printf_filtered ("Unable to open file %s\n", file);
3415 cleanup = make_cleanup_bfd_unref (abfd);
3417 if (bfd_check_format (abfd, bfd_object) == 0)
3419 printf_filtered ("File is not an object file\n");
3420 do_cleanups (cleanup);
3424 /* Setup the required download state: */
3425 mips_send_command ("set dlproto etxack\r", -1);
3426 mips_send_command ("set dlecho off\r", -1);
3427 /* NOTE: We get a "cannot set variable" message if the variable is
3428 already defined to have the argument we give. The code doesn't
3429 care, since it just scans to the next prompt anyway. */
3430 /* Start the download: */
3431 pmon_start_download ();
3433 /* Zero the checksum. */
3434 sprintf (buffer, "/Kxx\n");
3435 reclen = strlen (buffer);
3436 pmon_download (buffer, reclen);
3437 finished = pmon_check_ack ("/Kxx");
3439 for (s = abfd->sections; s && !finished; s = s->next)
3440 if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */
3442 bintotal += bfd_get_section_size (s);
3443 final = (s->vma + bfd_get_section_size (s));
3445 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name,
3446 (unsigned int) s->vma,
3447 (unsigned int) (s->vma + bfd_get_section_size (s)));
3448 gdb_flush (gdb_stdout);
3450 /* Output the starting address. */
3451 sprintf (buffer, "/A");
3452 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3453 buffer[2 + reclen] = '\n';
3454 buffer[3 + reclen] = '\0';
3455 reclen += 3; /* For the initial escape code and carriage return. */
3456 pmon_download (buffer, reclen);
3457 finished = pmon_check_ack ("/A");
3461 unsigned int binamount;
3462 unsigned int zerofill = 0;
3469 i < bfd_get_section_size (s) && !finished;
3474 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3476 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3478 /* This keeps a rolling checksum, until we decide to output
3480 for (; ((binamount - binptr) > 0);)
3482 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3483 &reclen, &csum, &zerofill);
3484 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3486 reclen = pmon_checkset (reclen, &bp, &csum);
3487 pmon_download (buffer, reclen);
3488 finished = pmon_check_ack ("data record");
3491 zerofill = 0; /* Do not transmit pending
3496 if (deprecated_ui_load_progress_hook)
3497 deprecated_ui_load_progress_hook (s->name, i);
3501 putchar_unfiltered ('#');
3502 gdb_flush (gdb_stdout);
3506 reclen = 0; /* buffer processed */
3511 /* Ensure no out-standing zerofill requests: */
3513 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3515 /* and then flush the line: */
3518 reclen = pmon_checkset (reclen, &bp, &csum);
3519 /* Currently pmon_checkset outputs the line terminator by
3520 default, so we write out the buffer so far: */
3521 pmon_download (buffer, reclen);
3522 finished = pmon_check_ack ("record remnant");
3526 putchar_unfiltered ('\n');
3529 /* Terminate the transfer. We know that we have an empty output
3530 buffer at this point. */
3531 sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */
3532 reclen = strlen (buffer);
3533 pmon_download (buffer, reclen);
3536 { /* Ignore the termination message: */
3537 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3540 { /* Deal with termination message: */
3541 pmon_end_download (final, bintotal);
3544 do_cleanups (cleanup);
3548 /* mips_load -- download a file. */
3551 mips_load (struct target_ops *self, char *file, int from_tty)
3553 struct regcache *regcache;
3555 /* Get the board out of remote debugging mode. */
3556 if (mips_exit_debug ())
3557 error (_("mips_load: Couldn't get into monitor mode."));
3559 if (mips_monitor != MON_IDT)
3560 pmon_load_fast (file);
3562 mips_load_srec (file);
3566 /* Finally, make the PC point at the start address. */
3567 regcache = get_current_regcache ();
3568 if (mips_monitor != MON_IDT)
3570 /* Work around problem where PMON monitor updates the PC after a load
3571 to a different value than GDB thinks it has. The following ensures
3572 that the regcache_write_pc() WILL update the PC value: */
3573 regcache_invalidate (regcache,
3574 mips_regnum (get_regcache_arch (regcache))->pc);
3577 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3580 /* Check to see if a thread is still alive. */
3583 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3585 if (ptid_equal (ptid, remote_mips_ptid))
3586 /* The monitor's task is always alive. */
3592 /* Convert a thread ID to a string. Returns the string in a static
3596 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3598 static char buf[64];
3600 if (ptid_equal (ptid, remote_mips_ptid))
3602 xsnprintf (buf, sizeof buf, "Thread <main>");
3606 return normal_pid_to_str (ptid);
3609 /* Pass the command argument as a packet to PMON verbatim. */
3612 pmon_command (char *args, int from_tty)
3614 char buf[DATA_MAXLEN + 1];
3617 sprintf (buf, "0x0 %s", args);
3618 mips_send_packet (buf, 1);
3619 printf_filtered ("Send packet: %s\n", buf);
3621 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3623 printf_filtered ("Received packet: %s\n", buf);
3626 /* -Wmissing-prototypes */
3627 extern initialize_file_ftype _initialize_remote_mips;
3629 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3630 Create target specific commands and perform other initializations
3631 specific to this file. */
3634 _initialize_remote_mips (void)
3636 /* Initialize the fields in mips_ops that are common to all four targets. */
3637 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3638 mips_ops.to_close = mips_close;
3639 mips_ops.to_detach = mips_detach;
3640 mips_ops.to_resume = mips_resume;
3641 mips_ops.to_fetch_registers = mips_fetch_registers;
3642 mips_ops.to_store_registers = mips_store_registers;
3643 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3644 mips_ops.to_xfer_partial = mips_xfer_partial;
3645 mips_ops.to_files_info = mips_files_info;
3646 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3647 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3648 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3649 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3650 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3651 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3652 mips_ops.to_kill = mips_kill;
3653 mips_ops.to_load = mips_load;
3654 mips_ops.to_create_inferior = mips_create_inferior;
3655 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3656 mips_ops.to_thread_alive = mips_thread_alive;
3657 mips_ops.to_pid_to_str = mips_pid_to_str;
3658 mips_ops.to_log_command = serial_log_command;
3659 mips_ops.to_stratum = process_stratum;
3660 mips_ops.to_has_all_memory = default_child_has_all_memory;
3661 mips_ops.to_has_memory = default_child_has_memory;
3662 mips_ops.to_has_stack = default_child_has_stack;
3663 mips_ops.to_has_registers = default_child_has_registers;
3664 mips_ops.to_has_execution = default_child_has_execution;
3665 mips_ops.to_magic = OPS_MAGIC;
3667 /* Copy the common fields to all four target vectors. */
3668 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3670 /* Initialize target-specific fields in the target vectors. */
3671 mips_ops.to_shortname = "mips";
3672 mips_ops.to_doc = "\
3673 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3674 The argument is the device it is connected to or, if it contains a colon,\n\
3675 HOST:PORT to access a board over a network";
3676 mips_ops.to_open = mips_open;
3677 mips_ops.to_wait = mips_wait;
3679 pmon_ops.to_shortname = "pmon";
3680 pmon_ops.to_doc = "\
3681 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3682 line. The argument is the device it is connected to or, if it contains a\n\
3683 colon, HOST:PORT to access a board over a network";
3684 pmon_ops.to_open = pmon_open;
3685 pmon_ops.to_wait = mips_wait;
3687 ddb_ops.to_shortname = "ddb";
3689 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3690 line. The first argument is the device it is connected to or, if it contains\n\
3691 a colon, HOST:PORT to access a board over a network. The optional second\n\
3692 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3693 TFTP downloads to the board. The optional third parameter is the local name\n\
3694 of the TFTP temporary file, if it differs from the filename seen by the board.";
3695 ddb_ops.to_open = ddb_open;
3696 ddb_ops.to_wait = mips_wait;
3698 rockhopper_ops.to_shortname = "rockhopper";
3699 rockhopper_ops.to_doc = ddb_ops.to_doc;
3700 rockhopper_ops.to_open = rockhopper_open;
3701 rockhopper_ops.to_wait = mips_wait;
3703 lsi_ops.to_shortname = "lsi";
3704 lsi_ops.to_doc = pmon_ops.to_doc;
3705 lsi_ops.to_open = lsi_open;
3706 lsi_ops.to_wait = mips_wait;
3708 /* Add the targets. */
3709 add_target (&mips_ops);
3710 add_target (&pmon_ops);
3711 add_target (&ddb_ops);
3712 add_target (&lsi_ops);
3713 add_target (&rockhopper_ops);
3715 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3716 Set timeout in seconds for remote MIPS serial I/O."), _("\
3717 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3719 NULL, /* FIXME: i18n: */
3720 &setlist, &showlist);
3722 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3723 &mips_retransmit_wait, _("\
3724 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3725 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3726 This is the number of seconds to wait for an acknowledgement to a packet\n\
3727 before resending the packet."),
3729 NULL, /* FIXME: i18n: */
3730 &setlist, &showlist);
3732 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3733 &mips_syn_garbage, _("\
3734 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3735 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3736 This is the maximum number of characters GDB will ignore when trying to\n\
3737 synchronize with the remote system. A value of -1 means that there is no\n\
3738 limit. (Note that these characters are printed out even though they are\n\
3741 NULL, /* FIXME: i18n: */
3742 &setlist, &showlist);
3744 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3745 &mips_monitor_prompt, _("\
3746 Set the prompt that GDB expects from the monitor."), _("\
3747 Show the prompt that GDB expects from the monitor."), NULL,
3749 NULL, /* FIXME: i18n: */
3750 &setlist, &showlist);
3752 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3753 &monitor_warnings, _("\
3754 Set printing of monitor warnings."), _("\
3755 Show printing of monitor warnings."), _("\
3756 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3758 NULL, /* FIXME: i18n: */
3759 &setlist, &showlist);
3761 add_com ("pmon", class_obscure, pmon_command,
3762 _("Send a packet to PMON (must be in debug mode)."));
3764 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3765 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3766 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3767 Use \"on\" to enable the masking and \"off\" to disable it."),
3769 NULL, /* FIXME: i18n: */
3770 &setlist, &showlist);
3771 remote_mips_ptid = ptid_build (42000, 0, 42000);