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/>. */
31 #include "exceptions.h"
34 #include "gdb_usleep.h"
37 #include "mips-tdep.h"
38 #include "gdbthread.h"
42 /* Breakpoint types. Values 0, 1, and 2 must agree with the watch
43 types passed by breakpoint.c to target_insert_watchpoint.
44 Value 3 is our own invention, and is used for ordinary instruction
45 breakpoints. Value 4 is used to mark an unused watchpoint in tables. */
55 /* Prototypes for local functions. */
57 static int mips_readchar (int timeout);
59 static int mips_receive_header (unsigned char *hdr, int *pgarbage,
62 static int mips_receive_trailer (unsigned char *trlr, int *pgarbage,
63 int *pch, int timeout);
65 static int mips_cksum (const unsigned char *hdr,
66 const char *data, int len);
68 static void mips_send_packet (const char *s, int get_ack);
70 static void mips_send_command (const char *cmd, int prompt);
72 static int mips_receive_packet (char *buff, int throw_error, int timeout);
74 static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data,
75 int *perr, int timeout, char *buff);
77 static void mips_initialize (void);
79 static void mips_open (char *name, int from_tty);
81 static void pmon_open (char *name, int from_tty);
83 static void ddb_open (char *name, int from_tty);
85 static void lsi_open (char *name, int from_tty);
87 static void mips_close (struct target_ops *self);
89 static int mips_map_regno (struct gdbarch *, int);
91 static void mips_set_register (int regno, ULONGEST value);
93 static void mips_prepare_to_store (struct target_ops *self,
94 struct regcache *regcache);
96 static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
98 static int mips_store_word (CORE_ADDR addr, unsigned int value,
101 static enum target_xfer_status mips_xfer_memory (gdb_byte *readbuf,
102 const gdb_byte *writebuf,
105 ULONGEST *xfered_len);
107 static void mips_files_info (struct target_ops *ignore);
109 static void mips_mourn_inferior (struct target_ops *ops);
111 static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum);
113 static int pmon_zeroset (int recsize, char **buff, unsigned int *amount,
114 unsigned int *chksum);
116 static int pmon_checkset (int recsize, char **buff, unsigned int *value);
118 static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf,
119 int *inptr, int inamount, int *recsize,
120 unsigned int *csum, unsigned int *zerofill);
122 static int pmon_check_ack (char *mesg);
124 static void pmon_start_download (void);
126 static void pmon_end_download (int final, int bintotal);
128 static void pmon_download (char *buffer, int length);
130 static void pmon_load_fast (char *file);
132 static void mips_load (struct target_ops *self, char *file, int from_tty);
134 static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr,
135 unsigned char *myaddr, int len);
137 static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type);
139 static int mips_clear_breakpoint (CORE_ADDR addr, int len,
140 enum break_type type);
142 static int mips_common_breakpoint (int set, CORE_ADDR addr, int len,
143 enum break_type type);
145 /* Forward declarations. */
146 extern struct target_ops mips_ops;
147 extern struct target_ops pmon_ops;
148 extern struct target_ops ddb_ops;
149 extern struct target_ops rockhopper_ops;
151 /* The MIPS remote debugging interface is built on top of a simple
152 packet protocol. Each packet is organized as follows:
154 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
155 may not appear anywhere else in the packet. Any time a SYN is
156 seen, a new packet should be assumed to have begun.
159 This byte contains the upper five bits of the logical length
160 of the data section, plus a single bit indicating whether this
161 is a data packet or an acknowledgement. The documentation
162 indicates that this bit is 1 for a data packet, but the actual
163 board uses 1 for an acknowledgement. The value of the byte is
164 0x40 + (ack ? 0x20 : 0) + (len >> 6)
165 (we always have 0 <= len < 1024). Acknowledgement packets do
166 not carry data, and must have a data length of 0.
168 LEN1 This byte contains the lower six bits of the logical length of
169 the data section. The value is
172 SEQ This byte contains the six bit sequence number of the packet.
175 An acknowlegment packet contains the sequence number of the
176 packet being acknowledged plus 1 modulo 64. Data packets are
177 transmitted in sequence. There may only be one outstanding
178 unacknowledged data packet at a time. The sequence numbers
179 are independent in each direction. If an acknowledgement for
180 the previous packet is received (i.e., an acknowledgement with
181 the sequence number of the packet just sent) the packet just
182 sent should be retransmitted. If no acknowledgement is
183 received within a timeout period, the packet should be
184 retransmitted. This has an unfortunate failure condition on a
185 high-latency line, as a delayed acknowledgement may lead to an
186 endless series of duplicate packets.
188 DATA The actual data bytes follow. The following characters are
189 escaped inline with DLE (ASCII 020, or ^P):
195 The additional DLE characters are not counted in the logical
196 length stored in the TYPE_LEN and LEN1 bytes.
201 These bytes contain an 18 bit checksum of the complete
202 contents of the packet excluding the SEQ byte and the
203 CSUM[123] bytes. The checksum is simply the twos complement
204 addition of all the bytes treated as unsigned characters. The
205 values of the checksum bytes are:
206 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
207 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
208 CSUM3: 0x40 + (cksum & 0x3f)
210 It happens that the MIPS remote debugging protocol always
211 communicates with ASCII strings. Because of this, this
212 implementation doesn't bother to handle the DLE quoting mechanism,
213 since it will never be required. */
217 /* The SYN character which starts each packet. */
220 /* The 0x40 used to offset each packet (this value ensures that all of
221 the header and trailer bytes, other than SYN, are printable ASCII
223 #define HDR_OFFSET 0x40
225 /* The indices of the bytes in the packet header. */
226 #define HDR_INDX_SYN 0
227 #define HDR_INDX_TYPE_LEN 1
228 #define HDR_INDX_LEN1 2
229 #define HDR_INDX_SEQ 3
232 /* The data/ack bit in the TYPE_LEN header byte. */
233 #define TYPE_LEN_DA_BIT 0x20
234 #define TYPE_LEN_DATA 0
235 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
237 /* How to compute the header bytes. */
238 #define HDR_SET_SYN(data, len, seq) (SYN)
239 #define HDR_SET_TYPE_LEN(data, len, seq) \
241 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
242 + (((len) >> 6) & 0x1f))
243 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
244 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
246 /* Check that a header byte is reasonable. */
247 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
249 /* Get data from the header. These macros evaluate their argument
251 #define HDR_IS_DATA(hdr) \
252 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
253 #define HDR_GET_LEN(hdr) \
254 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
255 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
257 /* The maximum data length. */
258 #define DATA_MAXLEN 1023
260 /* The trailer offset. */
261 #define TRLR_OFFSET HDR_OFFSET
263 /* The indices of the bytes in the packet trailer. */
264 #define TRLR_INDX_CSUM1 0
265 #define TRLR_INDX_CSUM2 1
266 #define TRLR_INDX_CSUM3 2
267 #define TRLR_LENGTH 3
269 /* How to compute the trailer bytes. */
270 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
271 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
272 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
274 /* Check that a trailer byte is reasonable. */
275 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
277 /* Get data from the trailer. This evaluates its argument multiple
279 #define TRLR_GET_CKSUM(trlr) \
280 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
281 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
282 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
284 /* The sequence number modulos. */
285 #define SEQ_MODULOS (64)
287 /* PMON commands to load from the serial port or UDP socket. */
288 #define LOAD_CMD "load -b -s tty0\r"
289 #define LOAD_CMD_UDP "load -b -s udp\r"
291 /* The target vectors for the four different remote MIPS targets.
292 These are initialized with code in _initialize_remote_mips instead
293 of static initializers, to make it easier to extend the target_ops
295 struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops;
297 enum mips_monitor_type
299 /* IDT/SIM monitor being used: */
301 /* PMON monitor being used: */
302 MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET]
303 Algorithmics Ltd. Nov 9 1995 17:19:50 */
304 MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET]
305 Risq Modular Systems,
306 Thu Jun 6 09:28:40 PDT 1996 */
307 MON_LSI, /* 4.3.12 [EB,FP],
308 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
310 /* Last and unused value, for sizing vectors, etc. */
313 static enum mips_monitor_type mips_monitor = MON_LAST;
315 /* The monitor prompt text. If the user sets the PMON prompt
316 to some new value, the GDB `set monitor-prompt' command must also
317 be used to inform GDB about the expected prompt. Otherwise, GDB
318 will not be able to connect to PMON in mips_initialize().
319 If the `set monitor-prompt' command is not used, the expected
320 default prompt will be set according the target:
327 static char *mips_monitor_prompt;
329 /* Set to 1 if the target is open. */
330 static int mips_is_open;
332 /* Currently active target description (if mips_is_open == 1). */
333 static struct target_ops *current_ops;
335 /* Set to 1 while the connection is being initialized. */
336 static int mips_initializing;
338 /* Set to 1 while the connection is being brought down. */
339 static int mips_exiting;
341 /* The next sequence number to send. */
342 static unsigned int mips_send_seq;
344 /* The next sequence number we expect to receive. */
345 static unsigned int mips_receive_seq;
347 /* The time to wait before retransmitting a packet, in seconds. */
348 static int mips_retransmit_wait = 3;
350 /* The number of times to try retransmitting a packet before giving up. */
351 static int mips_send_retries = 10;
353 /* The number of garbage characters to accept when looking for an
354 SYN for the next packet. */
355 static int mips_syn_garbage = 10;
357 /* The time to wait for a packet, in seconds. */
358 static int mips_receive_wait = 5;
360 /* Set if we have sent a packet to the board but have not yet received
362 static int mips_need_reply = 0;
364 /* Handle used to access serial I/O stream. */
365 static struct serial *mips_desc;
367 /* UDP handle used to download files to target. */
368 static struct serial *udp_desc;
369 static int udp_in_use;
371 /* TFTP filename used to download files to DDB board, in the form
373 static char *tftp_name; /* host:filename */
374 static char *tftp_localname; /* filename portion of above */
375 static int tftp_in_use;
376 static FILE *tftp_file;
378 /* Counts the number of times the user tried to interrupt the target (usually
380 static int interrupt_count;
382 /* If non-zero, means that the target is running. */
383 static int mips_wait_flag = 0;
385 /* If non-zero, monitor supports breakpoint commands. */
386 static int monitor_supports_breakpoints = 0;
388 /* Data cache header. */
390 #if 0 /* not used (yet?) */
391 static DCACHE *mips_dcache;
394 /* Non-zero means that we've just hit a read or write watchpoint. */
395 static int hit_watchpoint;
397 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
398 The table is indexed by a breakpoint number, which is an integer
399 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
401 #define MAX_LSI_BREAKPOINTS 256
402 struct lsi_breakpoint_info
404 enum break_type type; /* type of breakpoint */
405 CORE_ADDR addr; /* address of breakpoint */
406 int len; /* length of region being watched */
407 unsigned long value; /* value to watch */
409 lsi_breakpoints[MAX_LSI_BREAKPOINTS];
411 /* Error/warning codes returned by LSI PMON for breakpoint commands.
412 Warning values may be ORed together; error values may not. */
413 #define W_WARN 0x100 /* This bit is set if the error code
415 #define W_MSK 0x101 /* warning: Range feature is supported
417 #define W_VAL 0x102 /* warning: Value check is not
418 supported in hardware */
419 #define W_QAL 0x104 /* warning: Requested qualifiers are
420 not supported in hardware */
422 #define E_ERR 0x200 /* This bit is set if the error code
424 #define E_BPT 0x200 /* error: No such breakpoint number */
425 #define E_RGE 0x201 /* error: Range is not supported */
426 #define E_QAL 0x202 /* error: The requested qualifiers can
428 #define E_OUT 0x203 /* error: Out of hardware resources */
429 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
433 int code; /* error code */
434 char *string; /* string associated with this code */
437 struct lsi_error lsi_warning_table[] =
439 {W_MSK, "Range feature is supported via mask"},
440 {W_VAL, "Value check is not supported in hardware"},
441 {W_QAL, "Requested qualifiers are not supported in hardware"},
445 struct lsi_error lsi_error_table[] =
447 {E_BPT, "No such breakpoint number"},
448 {E_RGE, "Range is not supported"},
449 {E_QAL, "The requested qualifiers can not be used"},
450 {E_OUT, "Out of hardware resources"},
451 {E_NON, "Hardware breakpoint not supported"},
455 /* Set to 1 with the 'set monitor-warnings' command to enable printing
456 of warnings returned by PMON when hardware breakpoints are used. */
457 static int monitor_warnings;
459 /* This is the ptid we use while we're connected to the remote. Its
460 value is arbitrary, as the remote-mips target doesn't have a notion of
461 processes or threads, but we need something non-null to place in
463 static ptid_t remote_mips_ptid;
465 /* Close any ports which might be open. Reset certain globals indicating
466 the state of those ports. */
472 serial_close (mips_desc);
476 serial_close (udp_desc);
482 /* Handle low-level error that we can't recover from. Note that just
483 error()ing out from target_wait or some such low-level place will cause
484 all hell to break loose--the rest of GDB will tend to get left in an
485 inconsistent state. */
487 static void ATTRIBUTE_NORETURN
488 mips_error (char *string,...)
493 target_terminal_ours ();
494 wrap_here (""); /* Force out any buffered output. */
495 gdb_flush (gdb_stdout);
496 gdb_flush (gdb_stderr);
498 /* Clean up in such a way that mips_close won't try to talk to the
499 board (it almost surely won't work since we weren't able to talk to
503 if (!ptid_equal (inferior_ptid, null_ptid))
504 target_mourn_inferior ();
506 fmt = concat (_("Ending remote MIPS debugging: "),
507 string, (char *) NULL);
508 make_cleanup (xfree, fmt);
510 va_start (args, string);
511 throw_verror (TARGET_CLOSE_ERROR, fmt, args);
515 /* putc_readable - print a character, displaying non-printable chars in
516 ^x notation or in hex. */
519 fputc_readable (int ch, struct ui_file *file)
522 fputc_unfiltered ('\n', file);
524 fprintf_unfiltered (file, "\\r");
525 else if (ch < 0x20) /* ASCII control character */
526 fprintf_unfiltered (file, "^%c", ch + '@');
527 else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */
528 fprintf_unfiltered (file, "[%02x]", ch & 0xff);
530 fputc_unfiltered (ch, file);
534 /* puts_readable - print a string, displaying non-printable chars in
535 ^x notation or in hex. */
538 fputs_readable (const char *string, struct ui_file *file)
542 while ((c = *string++) != '\0')
543 fputc_readable (c, file);
547 /* Read P as a hex value. Return true if every character made sense,
548 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
551 read_hex_value (const char *p, ULONGEST *result)
559 if (*p >= '0' && *p <= '9')
561 else if (*p >= 'A' && *p <= 'F')
562 retval |= *p - 'A' + 10;
563 else if (*p >= 'a' && *p <= 'f')
564 retval |= *p - 'a' + 10;
574 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
575 timed out. TIMEOUT specifies timeout value in seconds. */
578 mips_expect_timeout (const char *string, int timeout)
580 const char *p = string;
584 fprintf_unfiltered (gdb_stdlog, "Expected \"");
585 fputs_readable (string, gdb_stdlog);
586 fprintf_unfiltered (gdb_stdlog, "\", got \"");
595 /* Must use serial_readchar() here cuz mips_readchar would get
596 confused if we were waiting for the mips_monitor_prompt... */
598 c = serial_readchar (mips_desc, timeout);
600 if (c == SERIAL_TIMEOUT)
603 fprintf_unfiltered (gdb_stdlog, "\": FAIL\n");
608 fputc_readable (c, gdb_stdlog);
616 fprintf_unfiltered (gdb_stdlog, "\": OK\n");
629 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
630 timed out. The timeout value is hard-coded to 2 seconds. Use
631 mips_expect_timeout if a different timeout value is needed. */
634 mips_expect (const char *string)
636 return mips_expect_timeout (string, remote_timeout);
639 /* Read a character from the remote, aborting on error. Returns
640 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
641 returns). FIXME: If we see the string mips_monitor_prompt from the
642 board, then we are debugging on the main console port, and we have
643 somehow dropped out of remote debugging mode. In this case, we
644 automatically go back in to remote debugging mode. This is a hack,
645 put in because I can't find any way for a program running on the
646 remote board to terminate without also ending remote debugging
647 mode. I assume users won't have any trouble with this; for one
648 thing, the IDT documentation generally assumes that the remote
649 debugging port is not the console port. This is, however, very
650 convenient for DejaGnu when you only have one connected serial
654 mips_readchar (int timeout)
657 static int state = 0;
658 int mips_monitor_prompt_len = strlen (mips_monitor_prompt);
660 { /* FIXME this whole block is dead code! */
664 if (i == -1 && watchdog > 0)
668 if (state == mips_monitor_prompt_len)
670 ch = serial_readchar (mips_desc, timeout);
672 if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */
674 target_mourn_inferior ();
675 error (_("Watchdog has expired. Target detached."));
678 if (ch == SERIAL_EOF)
679 mips_error (_("End of file from remote"));
680 if (ch == SERIAL_ERROR)
681 mips_error (_("Error reading from remote: %s"), safe_strerror (errno));
682 if (remote_debug > 1)
684 /* Don't use _filtered; we can't deal with a QUIT out of
685 target_wait, and I think this might be called from there. */
686 if (ch != SERIAL_TIMEOUT)
687 fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch);
689 fprintf_unfiltered (gdb_stdlog, "Timed out in read\n");
692 /* If we have seen mips_monitor_prompt and we either time out, or
693 we see a @ (which was echoed from a packet we sent), reset the
694 board as described above. The first character in a packet after
695 the SYN (which is not echoed) is always an @ unless the packet is
696 more than 64 characters long, which ours never are. */
697 if ((ch == SERIAL_TIMEOUT || ch == '@')
698 && state == mips_monitor_prompt_len
699 && !mips_initializing
702 if (remote_debug > 0)
703 /* Don't use _filtered; we can't deal with a QUIT out of
704 target_wait, and I think this might be called from there. */
705 fprintf_unfiltered (gdb_stdlog,
706 "Reinitializing MIPS debugging mode\n");
713 /* At this point, about the only thing we can do is abort the command
714 in progress and get back to command level as quickly as possible. */
716 error (_("Remote board reset, debug protocol re-initialized."));
719 if (ch == mips_monitor_prompt[state])
727 /* Get a packet header, putting the data in the supplied buffer.
728 PGARBAGE is a pointer to the number of garbage characters received
729 so far. CH is the last character received. Returns 0 for success,
730 or -1 for timeout. */
733 mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout)
739 /* Wait for a SYN. mips_syn_garbage is intended to prevent
740 sitting here indefinitely if the board sends us one garbage
741 character per second. ch may already have a value from the
742 last time through the loop. */
745 ch = mips_readchar (timeout);
746 if (ch == SERIAL_TIMEOUT)
750 /* Printing the character here lets the user of gdb see
751 what the program is outputting, if the debugging is
752 being done on the console port. Don't use _filtered:
753 we can't deal with a QUIT out of target_wait and
754 buffered target output confuses the user. */
755 if (!mips_initializing || remote_debug > 0)
757 if (isprint (ch) || isspace (ch))
759 fputc_unfiltered (ch, gdb_stdtarg);
763 fputc_readable (ch, gdb_stdtarg);
765 gdb_flush (gdb_stdtarg);
768 /* Only count unprintable characters. */
769 if (! (isprint (ch) || isspace (ch)))
772 if (mips_syn_garbage > 0
773 && *pgarbage > mips_syn_garbage)
774 mips_error (_("Debug protocol failure: more "
775 "than %d characters before a sync."),
780 /* Get the packet header following the SYN. */
781 for (i = 1; i < HDR_LENGTH; i++)
783 ch = mips_readchar (timeout);
784 if (ch == SERIAL_TIMEOUT)
786 /* Make sure this is a header byte. */
787 if (ch == SYN || !HDR_CHECK (ch))
793 /* If we got the complete header, we can return. Otherwise we
794 loop around and keep looking for SYN. */
800 /* Get a packet header, putting the data in the supplied buffer.
801 PGARBAGE is a pointer to the number of garbage characters received
802 so far. The last character read is returned in *PCH. Returns 0
803 for success, -1 for timeout, -2 for error. */
806 mips_receive_trailer (unsigned char *trlr, int *pgarbage,
807 int *pch, int timeout)
812 for (i = 0; i < TRLR_LENGTH; i++)
814 ch = mips_readchar (timeout);
816 if (ch == SERIAL_TIMEOUT)
818 if (!TRLR_CHECK (ch))
825 /* Get the checksum of a packet. HDR points to the packet header.
826 DATASTR points to the packet data. LEN is the length of DATASTR. */
829 mips_cksum (const unsigned char *hdr, const char *datastr, int len)
831 const unsigned char *p;
832 const unsigned char *data = (const unsigned char *) datastr;
838 /* The initial SYN is not included in the checksum. */
852 /* Send a packet containing the given ASCII string. */
855 mips_send_packet (const char *s, int get_ack)
857 /* unsigned */ int len;
858 unsigned char *packet;
863 if (len > DATA_MAXLEN)
864 mips_error (_("MIPS protocol data packet too long: %s"), s);
866 packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1);
868 packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq);
869 packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq);
870 packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq);
871 packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq);
873 memcpy (packet + HDR_LENGTH, s, len);
875 cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len);
876 packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
877 packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
878 packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
880 /* Increment the sequence number. This will set mips_send_seq to
881 the sequence number we expect in the acknowledgement. */
882 mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS;
884 /* We can only have one outstanding data packet, so we just wait for
885 the acknowledgement here. Keep retransmitting the packet until
886 we get one, or until we've tried too many times. */
887 for (try = 0; try < mips_send_retries; try++)
892 if (remote_debug > 0)
894 /* Don't use _filtered; we can't deal with a QUIT out of
895 target_wait, and I think this might be called from there. */
896 packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
897 fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1);
900 if (serial_write (mips_desc, packet,
901 HDR_LENGTH + len + TRLR_LENGTH) != 0)
902 mips_error (_("write to target failed: %s"), safe_strerror (errno));
911 unsigned char hdr[HDR_LENGTH + 1];
912 unsigned char trlr[TRLR_LENGTH + 1];
916 /* Get the packet header. If we time out, resend the data
918 err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait);
924 /* If we get a data packet, assume it is a duplicate and
925 ignore it. FIXME: If the acknowledgement is lost, this
926 data packet may be the packet the remote sends after the
928 if (HDR_IS_DATA (hdr))
932 /* Ignore any errors raised whilst attempting to ignore
935 len = HDR_GET_LEN (hdr);
937 for (i = 0; i < len; i++)
941 rch = mips_readchar (remote_timeout);
947 if (rch == SERIAL_TIMEOUT)
949 /* Ignore the character. */
953 (void) mips_receive_trailer (trlr, &garbage, &ch,
956 /* We don't bother checking the checksum, or providing an
957 ACK to the packet. */
961 /* If the length is not 0, this is a garbled packet. */
962 if (HDR_GET_LEN (hdr) != 0)
965 /* Get the packet trailer. */
966 err = mips_receive_trailer (trlr, &garbage, &ch,
967 mips_retransmit_wait);
969 /* If we timed out, resend the data packet. */
973 /* If we got a bad character, reread the header. */
977 /* If the checksum does not match the trailer checksum, this
978 is a bad packet; ignore it. */
979 if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr))
982 if (remote_debug > 0)
984 hdr[HDR_LENGTH] = '\0';
985 trlr[TRLR_LENGTH] = '\0';
986 /* Don't use _filtered; we can't deal with a QUIT out of
987 target_wait, and I think this might be called from there. */
988 fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n",
989 HDR_GET_SEQ (hdr), hdr + 1, trlr);
992 /* If this ack is for the current packet, we're done. */
993 seq = HDR_GET_SEQ (hdr);
994 if (seq == mips_send_seq)
997 /* If this ack is for the last packet, resend the current
999 if ((seq + 1) % SEQ_MODULOS == mips_send_seq)
1002 /* Otherwise this is a bad ack; ignore it. Increment the
1003 garbage count to ensure that we do not stay in this loop
1009 mips_error (_("Remote did not acknowledge packet"));
1012 /* Receive and acknowledge a packet, returning the data in BUFF (which
1013 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1014 implies that only the sender retransmits packets, so this code just
1015 waits silently for a packet. It returns the length of the received
1016 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1017 don't print an error message and return -1. */
1020 mips_receive_packet (char *buff, int throw_error, int timeout)
1025 unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1];
1032 unsigned char hdr[HDR_LENGTH];
1033 unsigned char trlr[TRLR_LENGTH];
1037 if (mips_receive_header (hdr, &garbage, ch, timeout) != 0)
1040 mips_error (_("Timed out waiting for remote packet"));
1047 /* An acknowledgement is probably a duplicate; ignore it. */
1048 if (!HDR_IS_DATA (hdr))
1050 len = HDR_GET_LEN (hdr);
1051 /* Check if the length is valid for an ACK, we may aswell
1052 try and read the remainder of the packet: */
1055 /* Ignore the error condition, since we are going to
1056 ignore the packet anyway. */
1057 (void) mips_receive_trailer (trlr, &garbage, &ch, timeout);
1059 /* Don't use _filtered; we can't deal with a QUIT out of
1060 target_wait, and I think this might be called from there. */
1061 if (remote_debug > 0)
1062 fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n");
1066 len = HDR_GET_LEN (hdr);
1067 for (i = 0; i < len; i++)
1071 rch = mips_readchar (timeout);
1077 if (rch == SERIAL_TIMEOUT)
1080 mips_error (_("Timed out waiting for remote packet"));
1089 /* Don't use _filtered; we can't deal with a QUIT out of
1090 target_wait, and I think this might be called from there. */
1091 if (remote_debug > 0)
1092 fprintf_unfiltered (gdb_stdlog,
1093 "Got new SYN after %d chars (wanted %d)\n",
1098 err = mips_receive_trailer (trlr, &garbage, &ch, timeout);
1102 mips_error (_("Timed out waiting for packet"));
1108 /* Don't use _filtered; we can't deal with a QUIT out of
1109 target_wait, and I think this might be called from there. */
1110 if (remote_debug > 0)
1111 fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n");
1115 /* If this is the wrong sequence number, ignore it. */
1116 if (HDR_GET_SEQ (hdr) != mips_receive_seq)
1118 /* Don't use _filtered; we can't deal with a QUIT out of
1119 target_wait, and I think this might be called from there. */
1120 if (remote_debug > 0)
1121 fprintf_unfiltered (gdb_stdlog,
1122 "Ignoring sequence number %d (want %d)\n",
1123 HDR_GET_SEQ (hdr), mips_receive_seq);
1127 if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr))
1130 if (remote_debug > 0)
1131 /* Don't use _filtered; we can't deal with a QUIT out of
1132 target_wait, and I think this might be called from there. */
1133 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1134 mips_cksum (hdr, buff, len),
1135 TRLR_GET_CKSUM (trlr));
1137 /* The checksum failed. Send an acknowledgement for the
1138 previous packet to tell the remote to resend the packet. */
1139 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1140 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1141 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1142 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1144 cksum = mips_cksum (ack, NULL, 0);
1146 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1147 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1148 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1150 if (remote_debug > 0)
1152 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1153 /* Don't use _filtered; we can't deal with a QUIT out of
1154 target_wait, and I think this might be called from there. */
1155 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1159 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1162 mips_error (_("write to target failed: %s"),
1163 safe_strerror (errno));
1169 if (remote_debug > 0)
1172 /* Don't use _filtered; we can't deal with a QUIT out of
1173 target_wait, and I think this might be called from there. */
1174 printf_unfiltered ("Got packet \"%s\"\n", buff);
1177 /* We got the packet. Send an acknowledgement. */
1178 mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS;
1180 ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq);
1181 ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq);
1182 ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq);
1183 ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq);
1185 cksum = mips_cksum (ack, NULL, 0);
1187 ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum);
1188 ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum);
1189 ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum);
1191 if (remote_debug > 0)
1193 ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
1194 /* Don't use _filtered; we can't deal with a QUIT out of
1195 target_wait, and I think this might be called from there. */
1196 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
1200 if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0)
1203 mips_error (_("write to target failed: %s"), safe_strerror (errno));
1211 /* Optionally send a request to the remote system and optionally wait
1212 for the reply. This implements the remote debugging protocol,
1213 which is built on top of the packet protocol defined above. Each
1214 request has an ADDR argument and a DATA argument. The following
1215 requests are defined:
1217 \0 don't send a request; just wait for a reply
1218 i read word from instruction space at ADDR
1219 d read word from data space at ADDR
1220 I write DATA to instruction space at ADDR
1221 D write DATA to data space at ADDR
1222 r read register number ADDR
1223 R set register number ADDR to value DATA
1224 c continue execution (if ADDR != 1, set pc to ADDR)
1225 s single step (if ADDR != 1, set pc to ADDR)
1227 The read requests return the value requested. The write requests
1228 return the previous value in the changed location. The execution
1229 requests return a UNIX wait value (the approximate signal which
1230 caused execution to stop is in the upper eight bits).
1232 If PERR is not NULL, this function waits for a reply. If an error
1233 occurs, it sets *PERR to 1 and sets errno according to what the
1234 target board reports. */
1237 mips_request (int cmd,
1244 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
1245 char myBuff[DATA_MAXLEN + 1];
1246 char response_string[17];
1253 if (buff == (char *) NULL)
1258 if (mips_need_reply)
1259 internal_error (__FILE__, __LINE__,
1260 _("mips_request: Trying to send "
1261 "command before reply"));
1262 /* 'T' sets a register to a 64-bit value, so make sure we use
1263 the right conversion function. */
1265 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1266 phex_nz (addr, addr_size), phex_nz (data, 8));
1268 sprintf (buff, "0x0 %c 0x%s 0x%s", cmd,
1269 phex_nz (addr, addr_size), phex_nz (data, addr_size));
1271 mips_send_packet (buff, 1);
1272 mips_need_reply = 1;
1275 if (perr == (int *) NULL)
1278 if (!mips_need_reply)
1279 internal_error (__FILE__, __LINE__,
1280 _("mips_request: Trying to get reply before command"));
1282 mips_need_reply = 0;
1284 len = mips_receive_packet (buff, 1, timeout);
1287 if (sscanf (buff, "0x%x %c 0x%x 0x%16s",
1288 &rpid, &rcmd, &rerrflg, response_string) != 4
1289 || !read_hex_value (response_string, &rresponse)
1290 || (cmd != '\0' && rcmd != cmd))
1291 mips_error (_("Bad response from remote board"));
1297 /* FIXME: This will returns MIPS errno numbers, which may or may
1298 not be the same as errno values used on other systems. If
1299 they stick to common errno values, they will be the same, but
1300 if they don't, they must be translated. */
1310 /* Cleanup associated with mips_initialize(). */
1313 mips_initialize_cleanups (void *arg)
1315 mips_initializing = 0;
1318 /* Cleanup associated with mips_exit_debug(). */
1321 mips_exit_cleanups (void *arg)
1326 /* Send a command and wait for that command to be echoed back. Wait,
1327 too, for the following prompt. */
1330 mips_send_command (const char *cmd, int prompt)
1332 serial_write (mips_desc, cmd, strlen (cmd));
1336 mips_expect (mips_monitor_prompt);
1339 /* Enter remote (dbx) debug mode: */
1342 mips_enter_debug (void)
1344 /* Reset the sequence numbers, ready for the new debug sequence: */
1346 mips_receive_seq = 0;
1348 if (mips_monitor != MON_IDT)
1349 mips_send_command ("debug\r", 0);
1350 else /* Assume IDT monitor by default. */
1351 mips_send_command ("db tty0\r", 0);
1353 gdb_usleep (1000000);
1354 serial_write (mips_desc, "\r", sizeof "\r" - 1);
1356 /* We don't need to absorb any spurious characters here, since the
1357 mips_receive_header will eat up a reasonable number of characters
1358 whilst looking for the SYN, however this avoids the "garbage"
1359 being displayed to the user. */
1360 if (mips_monitor != MON_IDT)
1364 char buff[DATA_MAXLEN + 1];
1366 if (mips_receive_packet (buff, 1, 3) < 0)
1367 mips_error (_("Failed to initialize (didn't receive packet)."));
1371 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1374 mips_exit_debug (void)
1377 struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL);
1381 if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER)
1383 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1384 so we do not get a reply to this command: */
1385 mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL);
1386 mips_need_reply = 0;
1387 if (!mips_expect (" break!"))
1389 do_cleanups (old_cleanups);
1394 mips_request ('x', 0, 0, &err, mips_receive_wait, NULL);
1396 if (!mips_expect (mips_monitor_prompt))
1398 do_cleanups (old_cleanups);
1402 do_cleanups (old_cleanups);
1407 /* Initialize a new connection to the MIPS board, and make sure we are
1408 really connected. */
1411 mips_initialize (void)
1414 struct cleanup *old_cleanups;
1417 /* What is this code doing here? I don't see any way it can happen, and
1418 it might mean mips_initializing didn't get cleared properly.
1419 So I'll make it a warning. */
1421 if (mips_initializing)
1423 warning (_("internal error: mips_initialize called twice"));
1427 old_cleanups = make_cleanup (mips_initialize_cleanups, NULL);
1430 mips_initializing = 1;
1432 /* At this point, the packit protocol isn't responding. We'll try getting
1433 into the monitor, and restarting the protocol. */
1435 /* Force the system into the monitor. After this we *should* be at
1436 the mips_monitor_prompt. */
1437 if (mips_monitor != MON_IDT)
1438 j = 0; /* Start by checking if we are already
1441 j = 1; /* Start by sending a break. */
1446 case 0: /* First, try sending a CR. */
1447 serial_flush_input (mips_desc);
1448 serial_write (mips_desc, "\r", 1);
1450 case 1: /* First, try sending a break. */
1451 serial_send_break (mips_desc);
1453 case 2: /* Then, try a ^C. */
1454 serial_write (mips_desc, "\003", 1);
1456 case 3: /* Then, try escaping from download. */
1458 if (mips_monitor != MON_IDT)
1462 /* We shouldn't need to send multiple termination
1463 sequences, since the target performs line (or
1464 block) reads, and then processes those
1465 packets. In-case we were downloading a large packet
1466 we flush the output buffer before inserting a
1467 termination sequence. */
1468 serial_flush_output (mips_desc);
1469 sprintf (tbuff, "\r/E/E\r");
1470 serial_write (mips_desc, tbuff, 6);
1477 /* We are possibly in binary download mode, having
1478 aborted in the middle of an S-record. ^C won't
1479 work because of binary mode. The only reliable way
1480 out is to send enough termination packets (8 bytes)
1481 to fill up and then overflow the largest size
1482 S-record (255 bytes in this case). This amounts to
1483 256/8 + 1 packets. */
1485 mips_make_srec (srec, '7', 0, NULL, 0);
1487 for (i = 1; i <= 33; i++)
1489 serial_write (mips_desc, srec, 8);
1491 if (serial_readchar (mips_desc, 0) >= 0)
1492 break; /* Break immediatly if we get something from
1499 mips_error (_("Failed to initialize."));
1502 if (mips_expect (mips_monitor_prompt))
1506 if (mips_monitor != MON_IDT)
1508 /* Sometimes PMON ignores the first few characters in the first
1509 command sent after a load. Sending a blank command gets
1511 mips_send_command ("\r", -1);
1513 /* Ensure the correct target state: */
1514 if (mips_monitor != MON_LSI)
1515 mips_send_command ("set regsize 64\r", -1);
1516 mips_send_command ("set hostport tty0\r", -1);
1517 mips_send_command ("set brkcmd \"\"\r", -1);
1518 /* Delete all the current breakpoints: */
1519 mips_send_command ("db *\r", -1);
1520 /* NOTE: PMON does not have breakpoint support through the
1521 "debug" mode, only at the monitor command-line. */
1524 mips_enter_debug ();
1526 /* Clear all breakpoints: */
1527 if ((mips_monitor == MON_IDT
1528 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0)
1529 || mips_monitor == MON_LSI)
1530 monitor_supports_breakpoints = 1;
1532 monitor_supports_breakpoints = 0;
1534 do_cleanups (old_cleanups);
1536 /* If this doesn't call error, we have connected; we don't care if
1537 the request itself succeeds or fails. */
1539 mips_request ('r', 0, 0, &err, mips_receive_wait, NULL);
1542 /* Open a connection to the remote board. */
1545 common_open (struct target_ops *ops, char *name, int from_tty,
1546 enum mips_monitor_type new_monitor,
1547 const char *new_monitor_prompt)
1549 char *serial_port_name;
1550 char *remote_name = 0;
1551 char *local_name = 0;
1553 struct cleanup *cleanup;
1557 To open a MIPS remote debugging connection, you need to specify what\n\
1558 serial device is attached to the target board (e.g., /dev/ttya).\n\
1559 If you want to use TFTP to download to the board, specify the name of a\n\
1560 temporary file to be used by GDB for downloads as the second argument.\n\
1561 This filename must be in the form host:filename, where host is the name\n\
1562 of the host running the TFTP server, and the file must be readable by the\n\
1563 world. If the local name of the temporary file differs from the name as\n\
1564 seen from the board via TFTP, specify that name as the third parameter.\n"));
1566 /* Parse the serial port name, the optional TFTP name, and the
1567 optional local TFTP name. */
1568 argv = gdb_buildargv (name);
1569 cleanup = make_cleanup_freeargv (argv);
1571 serial_port_name = xstrdup (argv[0]);
1572 if (argv[1]) /* Remote TFTP name specified? */
1574 remote_name = argv[1];
1575 if (argv[2]) /* Local TFTP filename specified? */
1576 local_name = argv[2];
1579 target_preopen (from_tty);
1582 unpush_target (current_ops);
1584 /* Open and initialize the serial port. */
1585 mips_desc = serial_open (serial_port_name);
1586 if (mips_desc == NULL)
1587 perror_with_name (serial_port_name);
1589 if (baud_rate != -1)
1591 if (serial_setbaudrate (mips_desc, baud_rate))
1593 serial_close (mips_desc);
1594 perror_with_name (serial_port_name);
1598 serial_raw (mips_desc);
1600 /* Open and initialize the optional download port. If it is in the form
1601 hostname#portnumber, it's a UDP socket. If it is in the form
1602 hostname:filename, assume it's the TFTP filename that must be
1603 passed to the DDB board to tell it where to get the load file. */
1606 if (strchr (remote_name, '#'))
1608 udp_desc = serial_open (remote_name);
1610 perror_with_name (_("Unable to open UDP port"));
1615 /* Save the remote and local names of the TFTP temp file. If
1616 the user didn't specify a local name, assume it's the same
1617 as the part of the remote name after the "host:". */
1621 xfree (tftp_localname);
1622 if (local_name == NULL)
1623 if ((local_name = strchr (remote_name, ':')) != NULL)
1624 local_name++; /* Skip over the colon. */
1625 if (local_name == NULL)
1626 local_name = remote_name; /* Local name same as remote name. */
1627 tftp_name = xstrdup (remote_name);
1628 tftp_localname = xstrdup (local_name);
1636 /* Reset the expected monitor prompt if it's never been set before. */
1637 if (mips_monitor_prompt == NULL)
1638 mips_monitor_prompt = xstrdup (new_monitor_prompt);
1639 mips_monitor = new_monitor;
1644 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name);
1646 /* Switch to using remote target now. */
1649 inferior_ptid = remote_mips_ptid;
1650 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
1651 add_thread_silent (inferior_ptid);
1653 /* Try to figure out the processor model if possible. */
1654 deprecated_mips_set_processor_regs_hack ();
1656 /* This is really the job of start_remote however, that makes an
1657 assumption that the target is about to print out a status message
1658 of some sort. That doesn't happen here (in fact, it may not be
1659 possible to get the monitor to send the appropriate packet). */
1661 reinit_frame_cache ();
1662 registers_changed ();
1663 stop_pc = regcache_read_pc (get_current_regcache ());
1664 print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1);
1665 xfree (serial_port_name);
1667 do_cleanups (cleanup);
1670 /* Open a connection to an IDT board. */
1673 mips_open (char *name, int from_tty)
1675 const char *monitor_prompt = NULL;
1676 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1677 && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips)
1679 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach)
1681 case bfd_mach_mips4100:
1682 case bfd_mach_mips4300:
1683 case bfd_mach_mips4600:
1684 case bfd_mach_mips4650:
1685 case bfd_mach_mips5000:
1686 monitor_prompt = "<RISQ> ";
1690 if (monitor_prompt == NULL)
1691 monitor_prompt = "<IDT>";
1692 common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt);
1695 /* Open a connection to a PMON board. */
1698 pmon_open (char *name, int from_tty)
1700 common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> ");
1703 /* Open a connection to a DDB board. */
1706 ddb_open (char *name, int from_tty)
1708 common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>");
1711 /* Open a connection to a rockhopper board. */
1714 rockhopper_open (char *name, int from_tty)
1716 common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>");
1719 /* Open a connection to an LSI board. */
1722 lsi_open (char *name, int from_tty)
1726 /* Clear the LSI breakpoint table. */
1727 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1728 lsi_breakpoints[i].type = BREAK_UNUSED;
1730 common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> ");
1733 /* Close a connection to the remote board. */
1736 mips_close (struct target_ops *self)
1740 /* Get the board out of remote debugging mode. */
1741 (void) mips_exit_debug ();
1746 generic_mourn_inferior ();
1749 /* Detach from the remote board. */
1752 mips_detach (struct target_ops *ops, const char *args, int from_tty)
1755 error (_("Argument given to \"detach\" when remotely debugging."));
1757 unpush_target (ops);
1760 printf_unfiltered ("Ending remote MIPS debugging.\n");
1763 /* Tell the target board to resume. This does not wait for a reply
1764 from the board, except in the case of single-stepping on LSI boards,
1765 where PMON does return a reply. */
1768 mips_resume (struct target_ops *ops,
1769 ptid_t ptid, int step, enum gdb_signal siggnal)
1773 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1774 a single step, so we wait for that. */
1775 mips_request (step ? 's' : 'c', 1, siggnal,
1776 mips_monitor == MON_LSI && step ? &err : (int *) NULL,
1777 mips_receive_wait, NULL);
1780 /* Return the signal corresponding to SIG, where SIG is the number which
1781 the MIPS protocol uses for the signal. */
1783 static enum gdb_signal
1784 mips_signal_from_protocol (int sig)
1786 /* We allow a few more signals than the IDT board actually returns, on
1787 the theory that there is at least *some* hope that perhaps the numbering
1788 for these signals is widely agreed upon. */
1791 return GDB_SIGNAL_UNKNOWN;
1793 /* Don't want to use gdb_signal_from_host because we are converting
1794 from MIPS signal numbers, not host ones. Our internal numbers
1795 match the MIPS numbers for the signals the board can return, which
1796 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1797 return (enum gdb_signal) sig;
1800 /* Set the register designated by REGNO to the value designated by VALUE. */
1803 mips_set_register (int regno, ULONGEST value)
1805 gdb_byte buf[MAX_REGISTER_SIZE];
1806 struct regcache *regcache = get_current_regcache ();
1807 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1808 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1810 /* We got the number the register holds, but gdb expects to see a
1811 value in the target byte ordering. */
1813 if (mips_monitor != MON_ROCKHOPPER
1814 && (regno == mips_regnum (gdbarch)->pc || regno < 32))
1815 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1816 In such cases we can only really debug 32-bit code properly so,
1817 when reading a GPR or the PC, assume that the full 64-bit
1818 value is the sign extension of the lower 32 bits. */
1819 store_signed_integer (buf, register_size (gdbarch, regno), byte_order,
1822 store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order,
1825 regcache_raw_supply (regcache, regno, buf);
1828 /* Wait until the remote stops, and return a wait status. */
1831 mips_wait (struct target_ops *ops,
1832 ptid_t ptid, struct target_waitstatus *status, int options)
1836 char buff[DATA_MAXLEN];
1837 ULONGEST rpc, rfp, rsp;
1838 char pc_string[17], fp_string[17], sp_string[17], flags[20];
1841 interrupt_count = 0;
1844 /* If we have not sent a single step or continue command, then the
1845 board is waiting for us to do something. Return a status
1846 indicating that it is stopped. */
1847 if (!mips_need_reply)
1849 status->kind = TARGET_WAITKIND_STOPPED;
1850 status->value.sig = GDB_SIGNAL_TRAP;
1851 return inferior_ptid;
1854 /* No timeout; we sit here as long as the program continues to execute. */
1856 rstatus = mips_request ('\000', 0, 0, &err, -1, buff);
1859 mips_error (_("Remote failure: %s"), safe_strerror (errno));
1861 /* On returning from a continue, the PMON monitor seems to start
1862 echoing back the messages we send prior to sending back the
1863 ACK. The code can cope with this, but to try and avoid the
1864 unnecessary serial traffic, and "spurious" characters displayed
1865 to the user, we cheat and reset the debug protocol. The problems
1866 seems to be caused by a check on the number of arguments, and the
1867 command length, within the monitor causing it to echo the command
1869 if (mips_monitor == MON_PMON)
1872 mips_enter_debug ();
1875 /* See if we got back extended status. If so, pick out the pc, fp,
1878 nfields = sscanf (buff,
1879 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1880 pc_string, fp_string, sp_string, flags);
1882 && read_hex_value (pc_string, &rpc)
1883 && read_hex_value (fp_string, &rfp)
1884 && read_hex_value (sp_string, &rsp))
1886 struct regcache *regcache = get_current_regcache ();
1887 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1889 mips_set_register (gdbarch_pc_regnum (gdbarch), rpc);
1890 mips_set_register (30, rfp);
1891 mips_set_register (gdbarch_sp_regnum (gdbarch), rsp);
1897 for (i = 0; i <= 2; i++)
1898 if (flags[i] == 'r' || flags[i] == 'w')
1900 else if (flags[i] == '\000')
1905 if (strcmp (target_shortname, "lsi") == 0)
1908 /* If this is an LSI PMON target, see if we just hit a
1909 hardrdware watchpoint. Right now, PMON doesn't give us
1910 enough information to determine which breakpoint we hit. So
1911 we have to look up the PC in our own table of breakpoints,
1912 and if found, assume it's just a normal instruction fetch
1913 breakpoint, not a data watchpoint. FIXME when PMON provides
1914 some way to tell us what type of breakpoint it is. */
1916 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1919 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
1921 if (lsi_breakpoints[i].addr == pc
1922 && lsi_breakpoints[i].type == BREAK_FETCH)
1929 /* If a data breakpoint was hit, PMON returns the following packet:
1931 The return packet from an ordinary breakpoint doesn't have the
1932 extra 0x01 field tacked onto the end. */
1933 if (nfields == 1 && rpc == 1)
1938 /* NOTE: The following (sig) numbers are defined by PMON:
1939 SPP_SIGTRAP 5 breakpoint
1947 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1948 and so on, because the constants we want here are determined by the
1949 MIPS protocol and have nothing to do with what host we are running on. */
1950 if ((rstatus & 0xff) == 0)
1952 status->kind = TARGET_WAITKIND_EXITED;
1953 status->value.integer = (((rstatus) >> 8) & 0xff);
1955 else if ((rstatus & 0xff) == 0x7f)
1957 status->kind = TARGET_WAITKIND_STOPPED;
1958 status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff);
1960 /* If the stop PC is in the _exit function, assume
1961 we hit the 'break 0x3ff' instruction in _exit, so this
1962 is not a normal breakpoint. */
1963 if (strcmp (target_shortname, "lsi") == 0)
1965 const char *func_name;
1966 CORE_ADDR func_start;
1967 CORE_ADDR pc = regcache_read_pc (get_current_regcache ());
1969 find_pc_partial_function (pc, &func_name, &func_start, NULL);
1970 if (func_name != NULL && strcmp (func_name, "_exit") == 0
1971 && func_start == pc)
1972 status->kind = TARGET_WAITKIND_EXITED;
1977 status->kind = TARGET_WAITKIND_SIGNALLED;
1978 status->value.sig = mips_signal_from_protocol (rstatus & 0x7f);
1981 return inferior_ptid;
1984 /* We have to map between the register numbers used by gdb and the
1985 register numbers used by the debugging protocol. */
1987 #define REGNO_OFFSET 96
1990 mips_map_regno (struct gdbarch *gdbarch, int regno)
1994 if (regno >= mips_regnum (gdbarch)->fp0
1995 && regno < mips_regnum (gdbarch)->fp0 + 32)
1996 return regno - mips_regnum (gdbarch)->fp0 + 32;
1997 else if (regno == mips_regnum (gdbarch)->pc)
1998 return REGNO_OFFSET + 0;
1999 else if (regno == mips_regnum (gdbarch)->cause)
2000 return REGNO_OFFSET + 1;
2001 else if (regno == mips_regnum (gdbarch)->hi)
2002 return REGNO_OFFSET + 2;
2003 else if (regno == mips_regnum (gdbarch)->lo)
2004 return REGNO_OFFSET + 3;
2005 else if (regno == mips_regnum (gdbarch)->fp_control_status)
2006 return REGNO_OFFSET + 4;
2007 else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
2008 return REGNO_OFFSET + 5;
2010 /* FIXME: Is there a way to get the status register? */
2014 /* Fetch the remote registers. */
2017 mips_fetch_registers (struct target_ops *ops,
2018 struct regcache *regcache, int regno)
2020 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2021 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2027 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2028 mips_fetch_registers (ops, regcache, regno);
2032 if (regno == gdbarch_deprecated_fp_regnum (gdbarch)
2033 || regno == MIPS_ZERO_REGNUM)
2034 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2035 supposed to read zero (see also mips-nat.c). */
2039 /* If PMON doesn't support this register, don't waste serial
2040 bandwidth trying to read it. */
2041 int pmon_reg = mips_map_regno (gdbarch, regno);
2043 if (regno != 0 && pmon_reg == 0)
2047 /* Unfortunately the PMON version in the Vr4300 board has been
2048 compiled without the 64bit register access commands. This
2049 means we cannot get hold of the full register width. */
2050 if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER)
2051 val = mips_request ('t', pmon_reg, 0,
2052 &err, mips_receive_wait, NULL);
2054 val = mips_request ('r', pmon_reg, 0,
2055 &err, mips_receive_wait, NULL);
2057 mips_error (_("Can't read register %d: %s"), regno,
2058 safe_strerror (errno));
2062 mips_set_register (regno, val);
2065 /* Prepare to store registers. The MIPS protocol can store individual
2066 registers, so this function doesn't have to do anything. */
2069 mips_prepare_to_store (struct target_ops *self, struct regcache *regcache)
2073 /* Store remote register(s). */
2076 mips_store_registers (struct target_ops *ops,
2077 struct regcache *regcache, int regno)
2079 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2085 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
2086 mips_store_registers (ops, regcache, regno);
2090 regcache_cooked_read_unsigned (regcache, regno, &val);
2091 mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R',
2092 mips_map_regno (gdbarch, regno),
2094 &err, mips_receive_wait, NULL);
2096 mips_error (_("Can't write register %d: %s"), regno,
2097 safe_strerror (errno));
2100 /* Fetch a word from the target board. Return word fetched in location
2101 addressed by VALP. Return 0 when successful; return positive error
2105 mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
2109 *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
2112 /* Data space failed; try instruction space. */
2113 *valp = mips_request ('i', addr, 0, &err,
2114 mips_receive_wait, NULL);
2119 /* Store a word to the target board. Returns errno code or zero for
2120 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2121 memory location there. */
2123 /* FIXME! make sure only 32-bit quantities get stored! */
2125 mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents)
2128 unsigned int oldcontents;
2130 oldcontents = mips_request ('D', addr, val, &err,
2131 mips_receive_wait, NULL);
2134 /* Data space failed; try instruction space. */
2135 oldcontents = mips_request ('I', addr, val, &err,
2136 mips_receive_wait, NULL);
2140 if (old_contents != NULL)
2141 *old_contents = oldcontents;
2145 /* Helper for mips_xfer_partial that handles memory transfers.
2146 Arguments are like target_xfer_partial. Note that the protocol
2147 gives us the correct value for a longword, since it transfers
2148 values in ASCII. We want the byte values, so we have to swap the
2151 static int mask_address_p = 1;
2153 static enum target_xfer_status
2154 mips_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
2155 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
2157 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
2164 /* PMON targets do not cope well with 64 bit addresses. Mask the
2165 value down to 32 bits. */
2167 memaddr &= (CORE_ADDR) 0xffffffff;
2169 /* Round starting address down to longword boundary. */
2170 addr = memaddr & ~3;
2171 /* Round ending address up; get number of longwords that makes. */
2172 count = (((memaddr + len) - addr) + 3) / 4;
2173 /* Allocate buffer of that many longwords. */
2174 buffer = alloca (count * 4);
2176 if (writebuf != NULL)
2178 /* Fill start and end extra bytes of buffer with existing data. */
2179 if (addr != memaddr || len < 4)
2183 if (mips_fetch_word (addr, &val))
2184 return TARGET_XFER_E_IO;
2186 /* Need part of initial word -- fetch it. */
2187 store_unsigned_integer (&buffer[0], 4, byte_order, val);
2194 /* Need part of last word -- fetch it. FIXME: we do this even
2195 if we don't need it. */
2196 if (mips_fetch_word (addr + (count - 1) * 4, &val))
2197 return TARGET_XFER_E_IO;
2199 store_unsigned_integer (&buffer[(count - 1) * 4],
2200 4, byte_order, val);
2203 /* Copy data to be written over corresponding part of buffer. */
2205 memcpy ((char *) buffer + (memaddr & 3), writebuf, len);
2207 /* Write the entire buffer. */
2209 for (i = 0; i < count; i++, addr += 4)
2213 word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order);
2214 status = mips_store_word (addr, word, NULL);
2215 /* Report each kilobyte (we download 32-bit words at a time). */
2218 printf_unfiltered ("*");
2219 gdb_flush (gdb_stdout);
2222 return TARGET_XFER_E_IO;
2223 /* FIXME: Do we want a QUIT here? */
2226 printf_unfiltered ("\n");
2230 /* Read all the longwords. */
2231 for (i = 0; i < count; i++, addr += 4)
2235 if (mips_fetch_word (addr, &val))
2236 return TARGET_XFER_E_IO;
2238 store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
2242 /* Copy appropriate bytes out of the buffer. */
2243 memcpy (readbuf, buffer + (memaddr & 3), len);
2248 /* Target to_xfer_partial implementation. */
2250 static enum target_xfer_status
2251 mips_xfer_partial (struct target_ops *ops, enum target_object object,
2252 const char *annex, gdb_byte *readbuf,
2253 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
2254 ULONGEST *xfered_len)
2258 case TARGET_OBJECT_MEMORY:
2259 return mips_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
2262 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2263 readbuf, writebuf, offset, len,
2268 /* Print info on this target. */
2271 mips_files_info (struct target_ops *ignore)
2273 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2276 /* Kill the process running on the board. This will actually only
2277 work if we are doing remote debugging over the console input. I
2278 think that if IDT/sim had the remote debug interrupt enabled on the
2279 right port, we could interrupt the process with a break signal. */
2282 mips_kill (struct target_ops *ops)
2284 if (!mips_wait_flag)
2286 target_mourn_inferior ();
2292 if (interrupt_count >= 2)
2294 interrupt_count = 0;
2296 target_terminal_ours ();
2298 if (query (_("Interrupted while waiting for the program.\n\
2299 Give up (and stop debugging it)? ")))
2301 /* Clean up in such a way that mips_close won't try to talk
2302 to the board (it almost surely won't work since we
2303 weren't able to talk to it). */
2307 printf_unfiltered ("Ending remote MIPS debugging.\n");
2308 target_mourn_inferior ();
2312 target_terminal_inferior ();
2315 if (remote_debug > 0)
2316 printf_unfiltered ("Sending break\n");
2318 serial_send_break (mips_desc);
2320 target_mourn_inferior ();
2329 serial_write (mips_desc, &cc, 1);
2331 target_mourn_inferior ();
2336 /* Start running on the target board. */
2339 mips_create_inferior (struct target_ops *ops, char *execfile,
2340 char *args, char **env, int from_tty)
2347 Can't pass arguments to remote MIPS board; arguments ignored."));
2348 /* And don't try to use them on the next "run" command. */
2349 execute_command ("set args", 0);
2352 if (execfile == 0 || exec_bfd == 0)
2353 error (_("No executable file specified"));
2355 entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
2357 init_wait_for_inferior ();
2359 regcache_write_pc (get_current_regcache (), entry_pt);
2362 /* Clean up after a process. The bulk of the work is done in mips_close(),
2363 which is called when unpushing the target. */
2366 mips_mourn_inferior (struct target_ops *ops)
2368 if (current_ops != NULL)
2369 unpush_target (current_ops);
2372 /* We can write a breakpoint and read the shadow contents in one
2375 /* Insert a breakpoint. On targets that don't have built-in
2376 breakpoint support, we read the contents of the target location and
2377 stash it, then overwrite it with a breakpoint instruction. ADDR is
2378 the target location in the target machine. BPT is the breakpoint
2379 being inserted or removed, which contains memory for saving the
2383 mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2384 struct bp_target_info *bp_tgt)
2386 if (monitor_supports_breakpoints)
2387 return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2390 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
2393 /* Remove a breakpoint. */
2396 mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
2397 struct bp_target_info *bp_tgt)
2399 if (monitor_supports_breakpoints)
2400 return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE,
2403 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
2406 /* Tell whether this target can support a hardware breakpoint. CNT
2407 is the number of hardware breakpoints already installed. This
2408 implements the target_can_use_hardware_watchpoint macro. */
2411 mips_can_use_watchpoint (struct target_ops *self,
2412 int type, int cnt, int othertype)
2414 return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0;
2418 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2419 This is used for memory ref breakpoints. */
2421 static unsigned long
2422 calculate_mask (CORE_ADDR addr, int len)
2427 mask = addr ^ (addr + len - 1);
2429 for (i = 32; i >= 0; i--)
2435 mask = (unsigned long) 0xffffffff >> i;
2441 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2442 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2446 mips_insert_watchpoint (struct target_ops *self,
2447 CORE_ADDR addr, int len, int type,
2448 struct expression *cond)
2450 if (mips_set_breakpoint (addr, len, type))
2456 /* Remove a watchpoint. */
2459 mips_remove_watchpoint (struct target_ops *self,
2460 CORE_ADDR addr, int len, int type,
2461 struct expression *cond)
2463 if (mips_clear_breakpoint (addr, len, type))
2469 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2473 mips_stopped_by_watchpoint (struct target_ops *ops)
2475 return hit_watchpoint;
2479 /* Insert a breakpoint. */
2482 mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2484 return mips_common_breakpoint (1, addr, len, type);
2488 /* Clear a breakpoint. */
2491 mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type)
2493 return mips_common_breakpoint (0, addr, len, type);
2497 /* Check the error code from the return packet for an LSI breakpoint
2498 command. If there's no error, just return 0. If it's a warning,
2499 print the warning text and return 0. If it's an error, print
2500 the error text and return 1. <ADDR> is the address of the breakpoint
2501 that was being set. <RERRFLG> is the error code returned by PMON.
2502 This is a helper function for mips_common_breakpoint. */
2505 mips_check_lsi_error (CORE_ADDR addr, int rerrflg)
2507 struct lsi_error *err;
2508 const char *saddr = paddress (target_gdbarch (), addr);
2510 if (rerrflg == 0) /* no error */
2513 /* Warnings can be ORed together, so check them all. */
2514 if (rerrflg & W_WARN)
2516 if (monitor_warnings)
2520 for (err = lsi_warning_table; err->code != 0; err++)
2522 if ((err->code & rerrflg) == err->code)
2525 fprintf_unfiltered (gdb_stderr, "\
2526 mips_common_breakpoint (%s): Warning: %s\n",
2532 fprintf_unfiltered (gdb_stderr, "\
2533 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2540 /* Errors are unique, i.e. can't be ORed together. */
2541 for (err = lsi_error_table; err->code != 0; err++)
2543 if ((err->code & rerrflg) == err->code)
2545 fprintf_unfiltered (gdb_stderr, "\
2546 mips_common_breakpoint (%s): Error: %s\n",
2552 fprintf_unfiltered (gdb_stderr, "\
2553 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2560 /* This routine sends a breakpoint command to the remote target.
2562 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2563 <ADDR> is the address of the breakpoint.
2564 <LEN> the length of the region to break on.
2565 <TYPE> is the type of breakpoint:
2566 0 = write (BREAK_WRITE)
2567 1 = read (BREAK_READ)
2568 2 = read/write (BREAK_ACCESS)
2569 3 = instruction fetch (BREAK_FETCH)
2571 Return 0 if successful; otherwise 1. */
2574 mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type)
2576 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
2577 char buf[DATA_MAXLEN + 1];
2579 int rpid, rerrflg, rresponse, rlen;
2582 addr = gdbarch_addr_bits_remove (target_gdbarch (), addr);
2584 if (mips_monitor == MON_LSI)
2586 if (set == 0) /* clear breakpoint */
2588 /* The LSI PMON "clear breakpoint" has this form:
2589 <pid> 'b' <bptn> 0x0
2591 <pid> 'b' 0x0 <code>
2593 <bptn> is a breakpoint number returned by an earlier 'B' command.
2594 Possible return codes: OK, E_BPT. */
2598 /* Search for the breakpoint in the table. */
2599 for (i = 0; i < MAX_LSI_BREAKPOINTS; i++)
2600 if (lsi_breakpoints[i].type == type
2601 && lsi_breakpoints[i].addr == addr
2602 && lsi_breakpoints[i].len == len)
2605 /* Clear the table entry and tell PMON to clear the breakpoint. */
2606 if (i == MAX_LSI_BREAKPOINTS)
2609 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2610 paddress (target_gdbarch (), addr));
2614 lsi_breakpoints[i].type = BREAK_UNUSED;
2615 sprintf (buf, "0x0 b 0x%x 0x0", i);
2616 mips_send_packet (buf, 1);
2618 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2621 nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg);
2623 mips_error (_("mips_common_breakpoint: "
2624 "Bad response from remote board: %s"),
2627 return (mips_check_lsi_error (addr, rerrflg));
2630 /* set a breakpoint */
2632 /* The LSI PMON "set breakpoint" command has this form:
2633 <pid> 'B' <addr> 0x0
2635 <pid> 'B' <bptn> <code>
2637 The "set data breakpoint" command has this form:
2639 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2641 where: type= "0x1" = read
2643 "0x3" = access (read or write)
2645 The reply returns two values:
2646 bptn - a breakpoint number, which is a small integer with
2647 possible values of zero through 255.
2648 code - an error return code, a value of zero indicates a
2649 succesful completion, other values indicate various
2650 errors and warnings.
2652 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2654 if (type == BREAK_FETCH) /* instruction breakpoint */
2657 sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size));
2663 sprintf (buf, "0x0 A 0x%s 0x%x 0x%s",
2664 phex_nz (addr, addr_size),
2665 type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3),
2666 phex_nz (addr + len - 1, addr_size));
2668 mips_send_packet (buf, 1);
2670 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2673 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2674 &rpid, &rcmd, &rresponse, &rerrflg);
2675 if (nfields != 4 || rcmd != cmd || rresponse > 255)
2676 mips_error (_("mips_common_breakpoint: "
2677 "Bad response from remote board: %s"),
2681 if (mips_check_lsi_error (addr, rerrflg))
2684 /* rresponse contains PMON's breakpoint number. Record the
2685 information for this breakpoint so we can clear it later. */
2686 lsi_breakpoints[rresponse].type = type;
2687 lsi_breakpoints[rresponse].addr = addr;
2688 lsi_breakpoints[rresponse].len = len;
2695 /* On non-LSI targets, the breakpoint command has this form:
2696 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2697 <MASK> is a don't care mask for addresses.
2698 <FLAGS> is any combination of `r', `w', or `f' for
2699 read/write/fetch. */
2703 mask = calculate_mask (addr, len);
2706 if (set) /* set a breakpoint */
2712 case BREAK_WRITE: /* write */
2715 case BREAK_READ: /* read */
2718 case BREAK_ACCESS: /* read/write */
2721 case BREAK_FETCH: /* fetch */
2725 internal_error (__FILE__, __LINE__,
2726 _("failed internal consistency check"));
2730 sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size),
2731 phex_nz (mask, addr_size), flags);
2736 sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size));
2739 mips_send_packet (buf, 1);
2741 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
2744 nfields = sscanf (buf, "0x%x %c 0x%x 0x%x",
2745 &rpid, &rcmd, &rerrflg, &rresponse);
2747 if (nfields != 4 || rcmd != cmd)
2748 mips_error (_("mips_common_breakpoint: "
2749 "Bad response from remote board: %s"),
2754 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2755 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2756 if (mips_monitor == MON_DDB)
2757 rresponse = rerrflg;
2758 if (rresponse != 22) /* invalid argument */
2759 fprintf_unfiltered (gdb_stderr, "\
2760 mips_common_breakpoint (%s): Got error: 0x%x\n",
2761 paddress (target_gdbarch (), addr), rresponse);
2768 /* Send one S record as specified by SREC of length LEN, starting
2769 at ADDR. Note, however, that ADDR is not used except to provide
2770 a useful message to the user in the event that a NACK is received
2774 send_srec (char *srec, int len, CORE_ADDR addr)
2780 serial_write (mips_desc, srec, len);
2782 ch = mips_readchar (remote_timeout);
2786 case SERIAL_TIMEOUT:
2787 error (_("Timeout during download."));
2791 case 0x15: /* NACK */
2792 fprintf_unfiltered (gdb_stderr,
2793 "Download got a NACK at byte %s! Retrying.\n",
2794 paddress (target_gdbarch (), addr));
2797 error (_("Download got unexpected ack char: 0x%x, retrying."),
2803 /* Download a binary file by converting it to S records. */
2806 mips_load_srec (char *args)
2813 unsigned int srec_frame = 200;
2815 struct cleanup *cleanup;
2816 static int hashmark = 1;
2818 buffer = alloca (srec_frame * 2 + 256);
2820 abfd = gdb_bfd_open (args, NULL, -1);
2823 printf_filtered ("Unable to open file %s\n", args);
2827 cleanup = make_cleanup_bfd_unref (abfd);
2828 if (bfd_check_format (abfd, bfd_object) == 0)
2830 printf_filtered ("File is not an object file\n");
2831 do_cleanups (cleanup);
2835 /* This actually causes a download in the IDT binary format: */
2836 mips_send_command (LOAD_CMD, 0);
2838 for (s = abfd->sections; s; s = s->next)
2840 if (s->flags & SEC_LOAD)
2842 unsigned int numbytes;
2844 /* FIXME! vma too small????? */
2845 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name,
2847 (long) (s->vma + bfd_get_section_size (s)));
2848 gdb_flush (gdb_stdout);
2850 for (i = 0; i < bfd_get_section_size (s); i += numbytes)
2852 numbytes = min (srec_frame, bfd_get_section_size (s) - i);
2854 bfd_get_section_contents (abfd, s, buffer, i, numbytes);
2856 reclen = mips_make_srec (srec, '3', s->vma + i,
2858 send_srec (srec, reclen, s->vma + i);
2860 if (deprecated_ui_load_progress_hook)
2861 deprecated_ui_load_progress_hook (s->name, i);
2865 putchar_unfiltered ('#');
2866 gdb_flush (gdb_stdout);
2869 } /* Per-packet (or S-record) loop */
2871 putchar_unfiltered ('\n');
2872 } /* Loadable sections */
2875 putchar_unfiltered ('\n');
2877 /* Write a type 7 terminator record. no data for a type 7, and there
2878 is no data, so len is 0. */
2880 reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0);
2882 send_srec (srec, reclen, abfd->start_address);
2884 serial_flush_input (mips_desc);
2885 do_cleanups (cleanup);
2889 * mips_make_srec -- make an srecord. This writes each line, one at a
2890 * time, each with it's own header and trailer line.
2891 * An srecord looks like this:
2893 * byte count-+ address
2894 * start ---+ | | data +- checksum
2896 * S01000006F6B692D746573742E73726563E4
2897 * S315000448600000000000000000FC00005900000000E9
2898 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2899 * S30B0004485A0000000000004E
2902 * S<type><length><address><data><checksum>
2906 * is the number of bytes following upto the checksum. Note that
2907 * this is not the number of chars following, since it takes two
2908 * chars to represent a byte.
2912 * 1) two byte address data record
2913 * 2) three byte address data record
2914 * 3) four byte address data record
2915 * 7) four byte address termination record
2916 * 8) three byte address termination record
2917 * 9) two byte address termination record
2920 * is the start address of the data following, or in the case of
2921 * a termination record, the start address of the image
2925 * is the sum of all the raw byte data in the record, from the length
2926 * upwards, modulo 256 and subtracted from 255.
2928 * This routine returns the length of the S-record.
2933 mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr,
2936 unsigned char checksum;
2939 /* Create the header for the srec. addr_size is the number of bytes
2940 in the address, and 1 is the number of bytes in the count. */
2942 /* FIXME!! bigger buf required for 64-bit! */
2945 buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */
2946 /* This assumes S3 style downloads (4byte addresses). There should
2947 probably be a check, or the code changed to make it more
2949 buf[3] = memaddr >> 24;
2950 buf[4] = memaddr >> 16;
2951 buf[5] = memaddr >> 8;
2953 memcpy (&buf[7], myaddr, len);
2955 /* Note that the checksum is calculated on the raw data, not the
2956 hexified data. It includes the length, address and the data
2957 portions of the packet. */
2959 buf += 2; /* Point at length byte. */
2960 for (i = 0; i < len + 4 + 1; i++)
2968 /* The following manifest controls whether we enable the simple flow
2969 control support provided by the monitor. If enabled the code will
2970 wait for an affirmative ACK between transmitting packets. */
2971 #define DOETXACK (1)
2973 /* The PMON fast-download uses an encoded packet format constructed of
2974 3byte data packets (encoded as 4 printable ASCII characters), and
2975 escape sequences (preceded by a '/'):
2978 'C' compare checksum (12bit value, not included in checksum calculation)
2979 'S' define symbol name (for addr) terminated with ","
2980 and padded to 4char boundary
2981 'Z' zero fill multiple of 3bytes
2982 'B' byte (12bit encoded value, of 8bit data)
2983 'A' address (36bit encoded value)
2984 'E' define entry as original address, and exit load
2986 The packets are processed in 4 character chunks, so the escape
2987 sequences that do not have any data (or variable length data)
2988 should be padded to a 4 character boundary. The decoder will give
2989 an error if the complete message block size is not a multiple of
2990 4bytes (size of record).
2992 The encoding of numbers is done in 6bit fields. The 6bit value is
2993 used to index into this string to get the specific character
2994 encoding for the value: */
2995 static char encoding[] =
2996 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2998 /* Convert the number of bits required into an encoded number, 6bits
2999 at a time (range 0..63). Keep a checksum if required (passed
3000 pointer non-NULL). The function returns the number of encoded
3001 characters written into the buffer. */
3004 pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum)
3006 int count = (n / 6);
3010 fprintf_unfiltered (gdb_stderr,
3011 "Fast encoding bitcount must be a "
3012 "multiple of 12bits: %dbit%s\n",
3013 n, (n == 1) ? "" : "s");
3018 fprintf_unfiltered (gdb_stderr,
3019 "Fast encoding cannot process more "
3020 "than 36bits at the moment: %dbits\n", n);
3024 /* Deal with the checksum: */
3030 *chksum += ((v >> 24) & 0xFFF);
3032 *chksum += ((v >> 12) & 0xFFF);
3034 *chksum += ((v >> 0) & 0xFFF);
3041 *p++ = encoding[(v >> n) & 0x3F];
3048 /* Shorthand function (that could be in-lined) to output the zero-fill
3049 escape sequence into the data stream. */
3052 pmon_zeroset (int recsize, char **buff,
3053 unsigned int *amount, unsigned int *chksum)
3057 sprintf (*buff, "/Z");
3058 count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum);
3059 *buff += (count + 2);
3061 return (recsize + count + 2);
3064 /* Add the checksum specified by *VALUE to end of the record under
3065 construction. *BUF specifies the location at which to begin
3066 writing characters comprising the checksum information. RECSIZE
3067 specifies the size of the record constructed thus far. (A trailing
3068 NUL character may be present in the buffer holding the record, but
3069 the record size does not include this character.)
3071 Return the total size of the record after adding the checksum escape,
3072 the checksum itself, and the trailing newline.
3074 The checksum specified by *VALUE is zeroed out prior to returning.
3075 Additionally, *BUF is updated to refer to the location just beyond
3076 the record elements added by this call. */
3079 pmon_checkset (int recsize, char **buff, unsigned int *value)
3083 /* Add the checksum (without updating the value): */
3084 sprintf (*buff, "/C");
3085 count = pmon_makeb64 (*value, (*buff + 2), 12, NULL);
3086 *buff += (count + 2);
3087 sprintf (*buff, "\n");
3088 *buff += 2; /* Include zero terminator. */
3089 /* Forcing a checksum validation clears the sum: */
3091 return (recsize + count + 3);
3094 /* Amount of padding we leave after at the end of the output buffer,
3095 for the checksum and line termination characters: */
3096 #define CHECKSIZE (4 + 4 + 4 + 2)
3097 /* zero-fill, checksum, transfer end and line termination space. */
3099 /* The amount of binary data loaded from the object file in a single
3101 #define BINCHUNK (1024)
3103 /* Maximum line of data accepted by the monitor: */
3104 #define MAXRECSIZE (550)
3105 /* NOTE: This constant depends on the monitor being used. This value
3106 is for PMON 5.x on the Cogent Vr4300 board. */
3108 /* Create a FastLoad format record.
3110 *OUTBUF is the buffer into which a FastLoad formatted record is
3111 written. On return, the pointer position represented by *OUTBUF
3112 is updated to point at the end of the data, i.e. the next position
3113 in the buffer that may be written. No attempt is made to NUL-
3114 terminate this portion of the record written to the buffer.
3116 INBUF contains the binary input data from which the FastLoad
3117 formatted record will be built. *INPTR is an index into this
3118 buffer. *INPTR is updated as the input is consumed. Thus, on
3119 return, the caller has access to the position of the next input
3120 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3123 *RECSIZE will be written with the size of the record written to the
3124 output buffer prior to returning. This size does not include a
3125 NUL-termination byte as none is written to the output buffer.
3127 *CSUM is the output buffer checksum. It is updated as data is
3128 written to the output buffer.
3130 *ZEROFILL is the current number of 3-byte zero sequences that have
3131 been encountered. It is both an input and an output to this
3135 pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr,
3136 int inamount, int *recsize, unsigned int *csum,
3137 unsigned int *zerofill)
3142 /* This is a simple check to ensure that our data will fit within
3143 the maximum allowable record size. Each record output is 4bytes
3144 in length. We must allow space for a pending zero fill command,
3145 the record, and a checksum record. */
3146 while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0))
3148 /* Process the binary data: */
3149 if ((inamount - *inptr) < 3)
3152 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3154 count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum);
3156 *recsize += (2 + count);
3161 unsigned int value = ((inbuf[*inptr + 0] << 16)
3162 | (inbuf[*inptr + 1] << 8)
3163 | (inbuf[*inptr + 2]));
3165 /* Simple check for zero data. TODO: A better check would be
3166 to check the last, and then the middle byte for being zero
3167 (if the first byte is not). We could then check for
3168 following runs of zeros, and if above a certain size it is
3169 worth the 4 or 8 character hit of the byte insertions used
3170 to pad to the start of the zeroes. NOTE: This also depends
3171 on the alignment at the end of the zero run. */
3172 if (value == 0x00000000)
3175 if (*zerofill == 0xFFF) /* 12bit counter */
3176 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3181 *recsize = pmon_zeroset (*recsize, &p, zerofill, csum);
3182 count = pmon_makeb64 (value, p, 24, csum);
3194 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3195 output the message specified by MESG. Return -1 for failure, 0
3199 pmon_check_ack (char *mesg)
3201 #if defined(DOETXACK)
3206 c = serial_readchar (udp_in_use ? udp_desc : mips_desc,
3208 if ((c == SERIAL_TIMEOUT) || (c != 0x06))
3210 fprintf_unfiltered (gdb_stderr,
3211 "Failed to receive valid ACK for %s\n", mesg);
3212 return (-1); /* Terminate the download. */
3215 #endif /* DOETXACK */
3219 /* pmon_download - Send a sequence of characters to the PMON download port,
3220 which is either a serial port or a UDP socket. */
3223 pmon_start_download (void)
3227 /* Create the temporary download file. */
3228 if ((tftp_file = fopen (tftp_localname, "w")) == NULL)
3229 perror_with_name (tftp_localname);
3233 mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0);
3234 mips_expect ("Downloading from ");
3235 mips_expect (udp_in_use ? "udp" : "tty0");
3236 mips_expect (", ^C to abort\r\n");
3240 /* Look for the string specified by STRING sent from the target board
3241 during a download operation. If the string in question is not
3242 seen, output an error message, remove the temporary file, if
3243 appropriate, and return 0. Otherwise, return 1 to indicate
3247 mips_expect_download (char *string)
3249 if (!mips_expect (string))
3251 fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n");
3253 remove (tftp_localname); /* Remove temporary file. */
3260 /* Look for messages from the target board associated with the entry
3263 NOTE: This function doesn't indicate success or failure, so we
3264 have no way to determine whether or not the output from the board
3265 was correctly seen. However, given that other items are checked
3266 after this, it seems unlikely that those checks will pass if this
3267 check doesn't first (silently) pass. */
3270 pmon_check_entry_address (char *entry_address, int final)
3272 char hexnumber[9]; /* Includes '\0' space. */
3274 mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout);
3275 sprintf (hexnumber, "%x", final);
3276 mips_expect (hexnumber);
3277 mips_expect ("\r\n");
3280 /* Look for messages from the target board showing the total number of
3281 bytes downloaded to the board. Output 1 for success if the tail
3282 end of the message was read correctly, 0 otherwise. */
3285 pmon_check_total (int bintotal)
3287 char hexnumber[9]; /* Includes '\0' space. */
3289 mips_expect ("\r\ntotal = 0x");
3290 sprintf (hexnumber, "%x", bintotal);
3291 mips_expect (hexnumber);
3292 return mips_expect_download (" bytes\r\n");
3295 /* Look for the termination messages associated with the end of
3296 a download to the board.
3298 Also, when `tftp_in_use' is set, issue the load command to the
3299 board causing the file to be transferred. (This is done prior
3300 to looking for the above mentioned termination messages.) */
3303 pmon_end_download (int final, int bintotal)
3305 char hexnumber[9]; /* Includes '\0' space. */
3309 static char *load_cmd_prefix = "load -b -s ";
3313 /* Close off the temporary file containing the load data. */
3317 /* Make the temporary file readable by the world. */
3318 if (stat (tftp_localname, &stbuf) == 0)
3319 chmod (tftp_localname, stbuf.st_mode | S_IROTH);
3321 /* Must reinitialize the board to prevent PMON from crashing. */
3322 if (mips_monitor != MON_ROCKHOPPER)
3323 mips_send_command ("initEther\r", -1);
3325 /* Send the load command. */
3326 cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2);
3327 strcpy (cmd, load_cmd_prefix);
3328 strcat (cmd, tftp_name);
3330 mips_send_command (cmd, 0);
3332 if (!mips_expect_download ("Downloading from "))
3334 if (!mips_expect_download (tftp_name))
3336 if (!mips_expect_download (", ^C to abort\r\n"))
3340 /* Wait for the stuff that PMON prints after the load has completed.
3341 The timeout value for use in the tftp case (15 seconds) was picked
3342 arbitrarily but might be too small for really large downloads. FIXME. */
3343 switch (mips_monitor)
3346 pmon_check_ack ("termination");
3347 pmon_check_entry_address ("Entry address is ", final);
3348 if (!pmon_check_total (bintotal))
3351 case MON_ROCKHOPPER:
3352 if (!pmon_check_total (bintotal))
3354 pmon_check_entry_address ("Entry Address = ", final);
3357 pmon_check_entry_address ("Entry Address = ", final);
3358 pmon_check_ack ("termination");
3359 if (!pmon_check_total (bintotal))
3365 remove (tftp_localname); /* Remove temporary file. */
3368 /* Write the buffer specified by BUFFER of length LENGTH to either
3369 the board or the temporary file that'll eventually be transferred
3373 pmon_download (char *buffer, int length)
3379 written = fwrite (buffer, 1, length, tftp_file);
3380 if (written < length)
3381 perror_with_name (tftp_localname);
3384 serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length);
3387 /* Open object or executable file, FILE, and send it to the board
3388 using the FastLoad format. */
3391 pmon_load_fast (char *file)
3395 unsigned char *binbuf;
3398 unsigned int csum = 0;
3399 int hashmark = !tftp_in_use;
3403 struct cleanup *cleanup;
3405 buffer = (char *) xmalloc (MAXRECSIZE + 1);
3406 binbuf = (unsigned char *) xmalloc (BINCHUNK);
3408 abfd = gdb_bfd_open (file, NULL, -1);
3411 printf_filtered ("Unable to open file %s\n", file);
3414 cleanup = make_cleanup_bfd_unref (abfd);
3416 if (bfd_check_format (abfd, bfd_object) == 0)
3418 printf_filtered ("File is not an object file\n");
3419 do_cleanups (cleanup);
3423 /* Setup the required download state: */
3424 mips_send_command ("set dlproto etxack\r", -1);
3425 mips_send_command ("set dlecho off\r", -1);
3426 /* NOTE: We get a "cannot set variable" message if the variable is
3427 already defined to have the argument we give. The code doesn't
3428 care, since it just scans to the next prompt anyway. */
3429 /* Start the download: */
3430 pmon_start_download ();
3432 /* Zero the checksum. */
3433 sprintf (buffer, "/Kxx\n");
3434 reclen = strlen (buffer);
3435 pmon_download (buffer, reclen);
3436 finished = pmon_check_ack ("/Kxx");
3438 for (s = abfd->sections; s && !finished; s = s->next)
3439 if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */
3441 bintotal += bfd_get_section_size (s);
3442 final = (s->vma + bfd_get_section_size (s));
3444 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name,
3445 (unsigned int) s->vma,
3446 (unsigned int) (s->vma + bfd_get_section_size (s)));
3447 gdb_flush (gdb_stdout);
3449 /* Output the starting address. */
3450 sprintf (buffer, "/A");
3451 reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum);
3452 buffer[2 + reclen] = '\n';
3453 buffer[3 + reclen] = '\0';
3454 reclen += 3; /* For the initial escape code and carriage return. */
3455 pmon_download (buffer, reclen);
3456 finished = pmon_check_ack ("/A");
3460 unsigned int binamount;
3461 unsigned int zerofill = 0;
3468 i < bfd_get_section_size (s) && !finished;
3473 binamount = min (BINCHUNK, bfd_get_section_size (s) - i);
3475 bfd_get_section_contents (abfd, s, binbuf, i, binamount);
3477 /* This keeps a rolling checksum, until we decide to output
3479 for (; ((binamount - binptr) > 0);)
3481 pmon_make_fastrec (&bp, binbuf, &binptr, binamount,
3482 &reclen, &csum, &zerofill);
3483 if (reclen >= (MAXRECSIZE - CHECKSIZE))
3485 reclen = pmon_checkset (reclen, &bp, &csum);
3486 pmon_download (buffer, reclen);
3487 finished = pmon_check_ack ("data record");
3490 zerofill = 0; /* Do not transmit pending
3495 if (deprecated_ui_load_progress_hook)
3496 deprecated_ui_load_progress_hook (s->name, i);
3500 putchar_unfiltered ('#');
3501 gdb_flush (gdb_stdout);
3505 reclen = 0; /* buffer processed */
3510 /* Ensure no out-standing zerofill requests: */
3512 reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum);
3514 /* and then flush the line: */
3517 reclen = pmon_checkset (reclen, &bp, &csum);
3518 /* Currently pmon_checkset outputs the line terminator by
3519 default, so we write out the buffer so far: */
3520 pmon_download (buffer, reclen);
3521 finished = pmon_check_ack ("record remnant");
3525 putchar_unfiltered ('\n');
3528 /* Terminate the transfer. We know that we have an empty output
3529 buffer at this point. */
3530 sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */
3531 reclen = strlen (buffer);
3532 pmon_download (buffer, reclen);
3535 { /* Ignore the termination message: */
3536 serial_flush_input (udp_in_use ? udp_desc : mips_desc);
3539 { /* Deal with termination message: */
3540 pmon_end_download (final, bintotal);
3543 do_cleanups (cleanup);
3547 /* mips_load -- download a file. */
3550 mips_load (struct target_ops *self, char *file, int from_tty)
3552 struct regcache *regcache;
3554 /* Get the board out of remote debugging mode. */
3555 if (mips_exit_debug ())
3556 error (_("mips_load: Couldn't get into monitor mode."));
3558 if (mips_monitor != MON_IDT)
3559 pmon_load_fast (file);
3561 mips_load_srec (file);
3565 /* Finally, make the PC point at the start address. */
3566 regcache = get_current_regcache ();
3567 if (mips_monitor != MON_IDT)
3569 /* Work around problem where PMON monitor updates the PC after a load
3570 to a different value than GDB thinks it has. The following ensures
3571 that the regcache_write_pc() WILL update the PC value: */
3572 regcache_invalidate (regcache,
3573 mips_regnum (get_regcache_arch (regcache))->pc);
3576 regcache_write_pc (regcache, bfd_get_start_address (exec_bfd));
3579 /* Check to see if a thread is still alive. */
3582 mips_thread_alive (struct target_ops *ops, ptid_t ptid)
3584 if (ptid_equal (ptid, remote_mips_ptid))
3585 /* The monitor's task is always alive. */
3591 /* Convert a thread ID to a string. Returns the string in a static
3595 mips_pid_to_str (struct target_ops *ops, ptid_t ptid)
3597 static char buf[64];
3599 if (ptid_equal (ptid, remote_mips_ptid))
3601 xsnprintf (buf, sizeof buf, "Thread <main>");
3605 return normal_pid_to_str (ptid);
3608 /* Pass the command argument as a packet to PMON verbatim. */
3611 pmon_command (char *args, int from_tty)
3613 char buf[DATA_MAXLEN + 1];
3616 sprintf (buf, "0x0 %s", args);
3617 mips_send_packet (buf, 1);
3618 printf_filtered ("Send packet: %s\n", buf);
3620 rlen = mips_receive_packet (buf, 1, mips_receive_wait);
3622 printf_filtered ("Received packet: %s\n", buf);
3625 /* -Wmissing-prototypes */
3626 extern initialize_file_ftype _initialize_remote_mips;
3628 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3629 Create target specific commands and perform other initializations
3630 specific to this file. */
3633 _initialize_remote_mips (void)
3635 /* Initialize the fields in mips_ops that are common to all four targets. */
3636 mips_ops.to_longname = "Remote MIPS debugging over serial line";
3637 mips_ops.to_close = mips_close;
3638 mips_ops.to_detach = mips_detach;
3639 mips_ops.to_resume = mips_resume;
3640 mips_ops.to_fetch_registers = mips_fetch_registers;
3641 mips_ops.to_store_registers = mips_store_registers;
3642 mips_ops.to_prepare_to_store = mips_prepare_to_store;
3643 mips_ops.to_xfer_partial = mips_xfer_partial;
3644 mips_ops.to_files_info = mips_files_info;
3645 mips_ops.to_insert_breakpoint = mips_insert_breakpoint;
3646 mips_ops.to_remove_breakpoint = mips_remove_breakpoint;
3647 mips_ops.to_insert_watchpoint = mips_insert_watchpoint;
3648 mips_ops.to_remove_watchpoint = mips_remove_watchpoint;
3649 mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint;
3650 mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint;
3651 mips_ops.to_kill = mips_kill;
3652 mips_ops.to_load = mips_load;
3653 mips_ops.to_create_inferior = mips_create_inferior;
3654 mips_ops.to_mourn_inferior = mips_mourn_inferior;
3655 mips_ops.to_thread_alive = mips_thread_alive;
3656 mips_ops.to_pid_to_str = mips_pid_to_str;
3657 mips_ops.to_log_command = serial_log_command;
3658 mips_ops.to_stratum = process_stratum;
3659 mips_ops.to_has_all_memory = default_child_has_all_memory;
3660 mips_ops.to_has_memory = default_child_has_memory;
3661 mips_ops.to_has_stack = default_child_has_stack;
3662 mips_ops.to_has_registers = default_child_has_registers;
3663 mips_ops.to_has_execution = default_child_has_execution;
3664 mips_ops.to_magic = OPS_MAGIC;
3666 /* Copy the common fields to all four target vectors. */
3667 rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops;
3669 /* Initialize target-specific fields in the target vectors. */
3670 mips_ops.to_shortname = "mips";
3671 mips_ops.to_doc = "\
3672 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3673 The argument is the device it is connected to or, if it contains a colon,\n\
3674 HOST:PORT to access a board over a network";
3675 mips_ops.to_open = mips_open;
3676 mips_ops.to_wait = mips_wait;
3678 pmon_ops.to_shortname = "pmon";
3679 pmon_ops.to_doc = "\
3680 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3681 line. The argument is the device it is connected to or, if it contains a\n\
3682 colon, HOST:PORT to access a board over a network";
3683 pmon_ops.to_open = pmon_open;
3684 pmon_ops.to_wait = mips_wait;
3686 ddb_ops.to_shortname = "ddb";
3688 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3689 line. The first argument is the device it is connected to or, if it contains\n\
3690 a colon, HOST:PORT to access a board over a network. The optional second\n\
3691 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3692 TFTP downloads to the board. The optional third parameter is the local name\n\
3693 of the TFTP temporary file, if it differs from the filename seen by the board.";
3694 ddb_ops.to_open = ddb_open;
3695 ddb_ops.to_wait = mips_wait;
3697 rockhopper_ops.to_shortname = "rockhopper";
3698 rockhopper_ops.to_doc = ddb_ops.to_doc;
3699 rockhopper_ops.to_open = rockhopper_open;
3700 rockhopper_ops.to_wait = mips_wait;
3702 lsi_ops.to_shortname = "lsi";
3703 lsi_ops.to_doc = pmon_ops.to_doc;
3704 lsi_ops.to_open = lsi_open;
3705 lsi_ops.to_wait = mips_wait;
3707 /* Add the targets. */
3708 add_target (&mips_ops);
3709 add_target (&pmon_ops);
3710 add_target (&ddb_ops);
3711 add_target (&lsi_ops);
3712 add_target (&rockhopper_ops);
3714 add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\
3715 Set timeout in seconds for remote MIPS serial I/O."), _("\
3716 Show timeout in seconds for remote MIPS serial I/O."), NULL,
3718 NULL, /* FIXME: i18n: */
3719 &setlist, &showlist);
3721 add_setshow_zinteger_cmd ("retransmit-timeout", no_class,
3722 &mips_retransmit_wait, _("\
3723 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3724 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3725 This is the number of seconds to wait for an acknowledgement to a packet\n\
3726 before resending the packet."),
3728 NULL, /* FIXME: i18n: */
3729 &setlist, &showlist);
3731 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class,
3732 &mips_syn_garbage, _("\
3733 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3734 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3735 This is the maximum number of characters GDB will ignore when trying to\n\
3736 synchronize with the remote system. A value of -1 means that there is no\n\
3737 limit. (Note that these characters are printed out even though they are\n\
3740 NULL, /* FIXME: i18n: */
3741 &setlist, &showlist);
3743 add_setshow_string_cmd ("monitor-prompt", class_obscure,
3744 &mips_monitor_prompt, _("\
3745 Set the prompt that GDB expects from the monitor."), _("\
3746 Show the prompt that GDB expects from the monitor."), NULL,
3748 NULL, /* FIXME: i18n: */
3749 &setlist, &showlist);
3751 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure,
3752 &monitor_warnings, _("\
3753 Set printing of monitor warnings."), _("\
3754 Show printing of monitor warnings."), _("\
3755 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3757 NULL, /* FIXME: i18n: */
3758 &setlist, &showlist);
3760 add_com ("pmon", class_obscure, pmon_command,
3761 _("Send a packet to PMON (must be in debug mode)."));
3763 add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\
3764 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3765 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3766 Use \"on\" to enable the masking and \"off\" to disable it."),
3768 NULL, /* FIXME: i18n: */
3769 &setlist, &showlist);
3770 remote_mips_ptid = ptid_build (42000, 0, 42000);