1 /* Remote debugging interface for MIPS remote debugging protocol.
3 Copyright (C) 1993-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by Ian Lance Taylor
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "exceptions.h"
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_close (struct target_ops
*self
);
81 static int mips_map_regno (struct gdbarch
*, int);
83 static void mips_set_register (int regno
, ULONGEST value
);
85 static void mips_prepare_to_store (struct target_ops
*self
,
86 struct regcache
*regcache
);
88 static int mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
);
90 static int mips_store_word (CORE_ADDR addr
, unsigned int value
,
93 static enum target_xfer_status
mips_xfer_memory (gdb_byte
*readbuf
,
94 const gdb_byte
*writebuf
,
97 ULONGEST
*xfered_len
);
99 static void mips_files_info (struct target_ops
*ignore
);
101 static void mips_mourn_inferior (struct target_ops
*ops
);
103 static int pmon_makeb64 (unsigned long v
, char *p
, int n
, unsigned int *chksum
);
105 static int pmon_zeroset (int recsize
, char **buff
, unsigned int *amount
,
106 unsigned int *chksum
);
108 static int pmon_checkset (int recsize
, char **buff
, unsigned int *value
);
110 static void pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
,
111 int *inptr
, int inamount
, int *recsize
,
112 unsigned int *csum
, unsigned int *zerofill
);
114 static int pmon_check_ack (char *mesg
);
116 static void pmon_start_download (void);
118 static void pmon_end_download (int final
, int bintotal
);
120 static void pmon_download (char *buffer
, int length
);
122 static void mips_load (struct target_ops
*self
, const char *file
, int from_tty
);
124 static int mips_make_srec (char *buffer
, int type
, CORE_ADDR memaddr
,
125 unsigned char *myaddr
, int len
);
127 static int mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
);
129 static int mips_clear_breakpoint (CORE_ADDR addr
, int len
,
130 enum break_type type
);
132 static int mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
,
133 enum break_type type
);
135 /* Forward declarations. */
136 extern struct target_ops mips_ops
;
137 extern struct target_ops pmon_ops
;
138 extern struct target_ops ddb_ops
;
139 extern struct target_ops rockhopper_ops
;
141 /* The MIPS remote debugging interface is built on top of a simple
142 packet protocol. Each packet is organized as follows:
144 SYN The first character is always a SYN (ASCII 026, or ^V). SYN
145 may not appear anywhere else in the packet. Any time a SYN is
146 seen, a new packet should be assumed to have begun.
149 This byte contains the upper five bits of the logical length
150 of the data section, plus a single bit indicating whether this
151 is a data packet or an acknowledgement. The documentation
152 indicates that this bit is 1 for a data packet, but the actual
153 board uses 1 for an acknowledgement. The value of the byte is
154 0x40 + (ack ? 0x20 : 0) + (len >> 6)
155 (we always have 0 <= len < 1024). Acknowledgement packets do
156 not carry data, and must have a data length of 0.
158 LEN1 This byte contains the lower six bits of the logical length of
159 the data section. The value is
162 SEQ This byte contains the six bit sequence number of the packet.
165 An acknowlegment packet contains the sequence number of the
166 packet being acknowledged plus 1 modulo 64. Data packets are
167 transmitted in sequence. There may only be one outstanding
168 unacknowledged data packet at a time. The sequence numbers
169 are independent in each direction. If an acknowledgement for
170 the previous packet is received (i.e., an acknowledgement with
171 the sequence number of the packet just sent) the packet just
172 sent should be retransmitted. If no acknowledgement is
173 received within a timeout period, the packet should be
174 retransmitted. This has an unfortunate failure condition on a
175 high-latency line, as a delayed acknowledgement may lead to an
176 endless series of duplicate packets.
178 DATA The actual data bytes follow. The following characters are
179 escaped inline with DLE (ASCII 020, or ^P):
185 The additional DLE characters are not counted in the logical
186 length stored in the TYPE_LEN and LEN1 bytes.
191 These bytes contain an 18 bit checksum of the complete
192 contents of the packet excluding the SEQ byte and the
193 CSUM[123] bytes. The checksum is simply the twos complement
194 addition of all the bytes treated as unsigned characters. The
195 values of the checksum bytes are:
196 CSUM1: 0x40 + ((cksum >> 12) & 0x3f)
197 CSUM2: 0x40 + ((cksum >> 6) & 0x3f)
198 CSUM3: 0x40 + (cksum & 0x3f)
200 It happens that the MIPS remote debugging protocol always
201 communicates with ASCII strings. Because of this, this
202 implementation doesn't bother to handle the DLE quoting mechanism,
203 since it will never be required. */
207 /* The SYN character which starts each packet. */
210 /* The 0x40 used to offset each packet (this value ensures that all of
211 the header and trailer bytes, other than SYN, are printable ASCII
213 #define HDR_OFFSET 0x40
215 /* The indices of the bytes in the packet header. */
216 #define HDR_INDX_SYN 0
217 #define HDR_INDX_TYPE_LEN 1
218 #define HDR_INDX_LEN1 2
219 #define HDR_INDX_SEQ 3
222 /* The data/ack bit in the TYPE_LEN header byte. */
223 #define TYPE_LEN_DA_BIT 0x20
224 #define TYPE_LEN_DATA 0
225 #define TYPE_LEN_ACK TYPE_LEN_DA_BIT
227 /* How to compute the header bytes. */
228 #define HDR_SET_SYN(data, len, seq) (SYN)
229 #define HDR_SET_TYPE_LEN(data, len, seq) \
231 + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \
232 + (((len) >> 6) & 0x1f))
233 #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f))
234 #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq))
236 /* Check that a header byte is reasonable. */
237 #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET)
239 /* Get data from the header. These macros evaluate their argument
241 #define HDR_IS_DATA(hdr) \
242 (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA)
243 #define HDR_GET_LEN(hdr) \
244 ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f)))
245 #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f)
247 /* The maximum data length. */
248 #define DATA_MAXLEN 1023
250 /* The trailer offset. */
251 #define TRLR_OFFSET HDR_OFFSET
253 /* The indices of the bytes in the packet trailer. */
254 #define TRLR_INDX_CSUM1 0
255 #define TRLR_INDX_CSUM2 1
256 #define TRLR_INDX_CSUM3 2
257 #define TRLR_LENGTH 3
259 /* How to compute the trailer bytes. */
260 #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f))
261 #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f))
262 #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f))
264 /* Check that a trailer byte is reasonable. */
265 #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET)
267 /* Get data from the trailer. This evaluates its argument multiple
269 #define TRLR_GET_CKSUM(trlr) \
270 ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \
271 + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \
272 + ((trlr)[TRLR_INDX_CSUM3] & 0x3f))
274 /* The sequence number modulos. */
275 #define SEQ_MODULOS (64)
277 /* PMON commands to load from the serial port or UDP socket. */
278 #define LOAD_CMD "load -b -s tty0\r"
279 #define LOAD_CMD_UDP "load -b -s udp\r"
281 /* The target vectors for the four different remote MIPS targets.
282 These are initialized with code in _initialize_remote_mips instead
283 of static initializers, to make it easier to extend the target_ops
285 struct target_ops mips_ops
, pmon_ops
, ddb_ops
, rockhopper_ops
, lsi_ops
;
287 enum mips_monitor_type
289 /* IDT/SIM monitor being used: */
291 /* PMON monitor being used: */
292 MON_PMON
, /* 3.0.83 [COGENT,EB,FP,NET]
293 Algorithmics Ltd. Nov 9 1995 17:19:50 */
294 MON_DDB
, /* 2.7.473 [DDBVR4300,EL,FP,NET]
295 Risq Modular Systems,
296 Thu Jun 6 09:28:40 PDT 1996 */
297 MON_LSI
, /* 4.3.12 [EB,FP],
298 LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */
300 /* Last and unused value, for sizing vectors, etc. */
303 static enum mips_monitor_type mips_monitor
= MON_LAST
;
305 /* The monitor prompt text. If the user sets the PMON prompt
306 to some new value, the GDB `set monitor-prompt' command must also
307 be used to inform GDB about the expected prompt. Otherwise, GDB
308 will not be able to connect to PMON in mips_initialize().
309 If the `set monitor-prompt' command is not used, the expected
310 default prompt will be set according the target:
317 static char *mips_monitor_prompt
;
319 /* Set to 1 if the target is open. */
320 static int mips_is_open
;
322 /* Currently active target description (if mips_is_open == 1). */
323 static struct target_ops
*current_ops
;
325 /* Set to 1 while the connection is being initialized. */
326 static int mips_initializing
;
328 /* Set to 1 while the connection is being brought down. */
329 static int mips_exiting
;
331 /* The next sequence number to send. */
332 static unsigned int mips_send_seq
;
334 /* The next sequence number we expect to receive. */
335 static unsigned int mips_receive_seq
;
337 /* The time to wait before retransmitting a packet, in seconds. */
338 static int mips_retransmit_wait
= 3;
340 /* The number of times to try retransmitting a packet before giving up. */
341 static int mips_send_retries
= 10;
343 /* The number of garbage characters to accept when looking for an
344 SYN for the next packet. */
345 static int mips_syn_garbage
= 10;
347 /* The time to wait for a packet, in seconds. */
348 static int mips_receive_wait
= 5;
350 /* Set if we have sent a packet to the board but have not yet received
352 static int mips_need_reply
= 0;
354 /* Handle used to access serial I/O stream. */
355 static struct serial
*mips_desc
;
357 /* UDP handle used to download files to target. */
358 static struct serial
*udp_desc
;
359 static int udp_in_use
;
361 /* TFTP filename used to download files to DDB board, in the form
363 static char *tftp_name
; /* host:filename */
364 static char *tftp_localname
; /* filename portion of above */
365 static int tftp_in_use
;
366 static FILE *tftp_file
;
368 /* Counts the number of times the user tried to interrupt the target (usually
370 static int interrupt_count
;
372 /* If non-zero, means that the target is running. */
373 static int mips_wait_flag
= 0;
375 /* If non-zero, monitor supports breakpoint commands. */
376 static int monitor_supports_breakpoints
= 0;
378 /* Data cache header. */
380 #if 0 /* not used (yet?) */
381 static DCACHE
*mips_dcache
;
384 /* Non-zero means that we've just hit a read or write watchpoint. */
385 static int hit_watchpoint
;
387 /* Table of breakpoints/watchpoints (used only on LSI PMON target).
388 The table is indexed by a breakpoint number, which is an integer
389 from 0 to 255 returned by the LSI PMON when a breakpoint is set. */
391 #define MAX_LSI_BREAKPOINTS 256
392 struct lsi_breakpoint_info
394 enum break_type type
; /* type of breakpoint */
395 CORE_ADDR addr
; /* address of breakpoint */
396 int len
; /* length of region being watched */
397 unsigned long value
; /* value to watch */
399 lsi_breakpoints
[MAX_LSI_BREAKPOINTS
];
401 /* Error/warning codes returned by LSI PMON for breakpoint commands.
402 Warning values may be ORed together; error values may not. */
403 #define W_WARN 0x100 /* This bit is set if the error code
405 #define W_MSK 0x101 /* warning: Range feature is supported
407 #define W_VAL 0x102 /* warning: Value check is not
408 supported in hardware */
409 #define W_QAL 0x104 /* warning: Requested qualifiers are
410 not supported in hardware */
412 #define E_ERR 0x200 /* This bit is set if the error code
414 #define E_BPT 0x200 /* error: No such breakpoint number */
415 #define E_RGE 0x201 /* error: Range is not supported */
416 #define E_QAL 0x202 /* error: The requested qualifiers can
418 #define E_OUT 0x203 /* error: Out of hardware resources */
419 #define E_NON 0x204 /* error: Hardware breakpoint not supported */
423 int code
; /* error code */
424 char *string
; /* string associated with this code */
427 struct lsi_error lsi_warning_table
[] =
429 {W_MSK
, "Range feature is supported via mask"},
430 {W_VAL
, "Value check is not supported in hardware"},
431 {W_QAL
, "Requested qualifiers are not supported in hardware"},
435 struct lsi_error lsi_error_table
[] =
437 {E_BPT
, "No such breakpoint number"},
438 {E_RGE
, "Range is not supported"},
439 {E_QAL
, "The requested qualifiers can not be used"},
440 {E_OUT
, "Out of hardware resources"},
441 {E_NON
, "Hardware breakpoint not supported"},
445 /* Set to 1 with the 'set monitor-warnings' command to enable printing
446 of warnings returned by PMON when hardware breakpoints are used. */
447 static int monitor_warnings
;
449 /* This is the ptid we use while we're connected to the remote. Its
450 value is arbitrary, as the remote-mips target doesn't have a notion of
451 processes or threads, but we need something non-null to place in
453 static ptid_t remote_mips_ptid
;
455 /* Close any ports which might be open. Reset certain globals indicating
456 the state of those ports. */
462 serial_close (mips_desc
);
466 serial_close (udp_desc
);
472 /* Handle low-level error that we can't recover from. Note that just
473 error()ing out from target_wait or some such low-level place will cause
474 all hell to break loose--the rest of GDB will tend to get left in an
475 inconsistent state. */
477 static void ATTRIBUTE_NORETURN
478 mips_error (char *string
,...)
483 target_terminal_ours ();
484 wrap_here (""); /* Force out any buffered output. */
485 gdb_flush (gdb_stdout
);
486 gdb_flush (gdb_stderr
);
488 /* Clean up in such a way that mips_close won't try to talk to the
489 board (it almost surely won't work since we weren't able to talk to
493 if (!ptid_equal (inferior_ptid
, null_ptid
))
494 target_mourn_inferior ();
496 fmt
= concat (_("Ending remote MIPS debugging: "),
497 string
, (char *) NULL
);
498 make_cleanup (xfree
, fmt
);
500 va_start (args
, string
);
501 throw_verror (TARGET_CLOSE_ERROR
, fmt
, args
);
505 /* putc_readable - print a character, displaying non-printable chars in
506 ^x notation or in hex. */
509 fputc_readable (int ch
, struct ui_file
*file
)
512 fputc_unfiltered ('\n', file
);
514 fprintf_unfiltered (file
, "\\r");
515 else if (ch
< 0x20) /* ASCII control character */
516 fprintf_unfiltered (file
, "^%c", ch
+ '@');
517 else if (ch
>= 0x7f) /* non-ASCII characters (rubout or greater) */
518 fprintf_unfiltered (file
, "[%02x]", ch
& 0xff);
520 fputc_unfiltered (ch
, file
);
524 /* puts_readable - print a string, displaying non-printable chars in
525 ^x notation or in hex. */
528 fputs_readable (const char *string
, struct ui_file
*file
)
532 while ((c
= *string
++) != '\0')
533 fputc_readable (c
, file
);
537 /* Read P as a hex value. Return true if every character made sense,
538 storing the result in *RESULT. Leave *RESULT unchanged otherwise. */
541 read_hex_value (const char *p
, ULONGEST
*result
)
549 if (*p
>= '0' && *p
<= '9')
551 else if (*p
>= 'A' && *p
<= 'F')
552 retval
|= *p
- 'A' + 10;
553 else if (*p
>= 'a' && *p
<= 'f')
554 retval
|= *p
- 'a' + 10;
564 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
565 timed out. TIMEOUT specifies timeout value in seconds. */
568 mips_expect_timeout (const char *string
, int timeout
)
570 const char *p
= string
;
574 fprintf_unfiltered (gdb_stdlog
, "Expected \"");
575 fputs_readable (string
, gdb_stdlog
);
576 fprintf_unfiltered (gdb_stdlog
, "\", got \"");
585 /* Must use serial_readchar() here cuz mips_readchar would get
586 confused if we were waiting for the mips_monitor_prompt... */
588 c
= serial_readchar (mips_desc
, timeout
);
590 if (c
== SERIAL_TIMEOUT
)
593 fprintf_unfiltered (gdb_stdlog
, "\": FAIL\n");
598 fputc_readable (c
, gdb_stdlog
);
606 fprintf_unfiltered (gdb_stdlog
, "\": OK\n");
619 /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if
620 timed out. The timeout value is hard-coded to 2 seconds. Use
621 mips_expect_timeout if a different timeout value is needed. */
624 mips_expect (const char *string
)
626 return mips_expect_timeout (string
, remote_timeout
);
629 /* Read a character from the remote, aborting on error. Returns
630 SERIAL_TIMEOUT on timeout (since that's what serial_readchar()
631 returns). FIXME: If we see the string mips_monitor_prompt from the
632 board, then we are debugging on the main console port, and we have
633 somehow dropped out of remote debugging mode. In this case, we
634 automatically go back in to remote debugging mode. This is a hack,
635 put in because I can't find any way for a program running on the
636 remote board to terminate without also ending remote debugging
637 mode. I assume users won't have any trouble with this; for one
638 thing, the IDT documentation generally assumes that the remote
639 debugging port is not the console port. This is, however, very
640 convenient for DejaGnu when you only have one connected serial
644 mips_readchar (int timeout
)
647 static int state
= 0;
648 int mips_monitor_prompt_len
= strlen (mips_monitor_prompt
);
650 { /* FIXME this whole block is dead code! */
654 if (i
== -1 && watchdog
> 0)
658 if (state
== mips_monitor_prompt_len
)
660 ch
= serial_readchar (mips_desc
, timeout
);
662 if (ch
== SERIAL_TIMEOUT
&& timeout
== -1) /* Watchdog went off. */
664 target_mourn_inferior ();
665 error (_("Watchdog has expired. Target detached."));
668 if (ch
== SERIAL_EOF
)
669 mips_error (_("End of file from remote"));
670 if (ch
== SERIAL_ERROR
)
671 mips_error (_("Error reading from remote: %s"), safe_strerror (errno
));
672 if (remote_debug
> 1)
674 /* Don't use _filtered; we can't deal with a QUIT out of
675 target_wait, and I think this might be called from there. */
676 if (ch
!= SERIAL_TIMEOUT
)
677 fprintf_unfiltered (gdb_stdlog
, "Read '%c' %d 0x%x\n", ch
, ch
, ch
);
679 fprintf_unfiltered (gdb_stdlog
, "Timed out in read\n");
682 /* If we have seen mips_monitor_prompt and we either time out, or
683 we see a @ (which was echoed from a packet we sent), reset the
684 board as described above. The first character in a packet after
685 the SYN (which is not echoed) is always an @ unless the packet is
686 more than 64 characters long, which ours never are. */
687 if ((ch
== SERIAL_TIMEOUT
|| ch
== '@')
688 && state
== mips_monitor_prompt_len
689 && !mips_initializing
692 if (remote_debug
> 0)
693 /* Don't use _filtered; we can't deal with a QUIT out of
694 target_wait, and I think this might be called from there. */
695 fprintf_unfiltered (gdb_stdlog
,
696 "Reinitializing MIPS debugging mode\n");
703 /* At this point, about the only thing we can do is abort the command
704 in progress and get back to command level as quickly as possible. */
706 error (_("Remote board reset, debug protocol re-initialized."));
709 if (ch
== mips_monitor_prompt
[state
])
717 /* Get a packet header, putting the data in the supplied buffer.
718 PGARBAGE is a pointer to the number of garbage characters received
719 so far. CH is the last character received. Returns 0 for success,
720 or -1 for timeout. */
723 mips_receive_header (unsigned char *hdr
, int *pgarbage
, int ch
, int timeout
)
729 /* Wait for a SYN. mips_syn_garbage is intended to prevent
730 sitting here indefinitely if the board sends us one garbage
731 character per second. ch may already have a value from the
732 last time through the loop. */
735 ch
= mips_readchar (timeout
);
736 if (ch
== SERIAL_TIMEOUT
)
740 /* Printing the character here lets the user of gdb see
741 what the program is outputting, if the debugging is
742 being done on the console port. Don't use _filtered:
743 we can't deal with a QUIT out of target_wait and
744 buffered target output confuses the user. */
745 if (!mips_initializing
|| remote_debug
> 0)
747 if (isprint (ch
) || isspace (ch
))
749 fputc_unfiltered (ch
, gdb_stdtarg
);
753 fputc_readable (ch
, gdb_stdtarg
);
755 gdb_flush (gdb_stdtarg
);
758 /* Only count unprintable characters. */
759 if (! (isprint (ch
) || isspace (ch
)))
762 if (mips_syn_garbage
> 0
763 && *pgarbage
> mips_syn_garbage
)
764 mips_error (_("Debug protocol failure: more "
765 "than %d characters before a sync."),
770 /* Get the packet header following the SYN. */
771 for (i
= 1; i
< HDR_LENGTH
; i
++)
773 ch
= mips_readchar (timeout
);
774 if (ch
== SERIAL_TIMEOUT
)
776 /* Make sure this is a header byte. */
777 if (ch
== SYN
|| !HDR_CHECK (ch
))
783 /* If we got the complete header, we can return. Otherwise we
784 loop around and keep looking for SYN. */
790 /* Get a packet header, putting the data in the supplied buffer.
791 PGARBAGE is a pointer to the number of garbage characters received
792 so far. The last character read is returned in *PCH. Returns 0
793 for success, -1 for timeout, -2 for error. */
796 mips_receive_trailer (unsigned char *trlr
, int *pgarbage
,
797 int *pch
, int timeout
)
802 for (i
= 0; i
< TRLR_LENGTH
; i
++)
804 ch
= mips_readchar (timeout
);
806 if (ch
== SERIAL_TIMEOUT
)
808 if (!TRLR_CHECK (ch
))
815 /* Get the checksum of a packet. HDR points to the packet header.
816 DATASTR points to the packet data. LEN is the length of DATASTR. */
819 mips_cksum (const unsigned char *hdr
, const char *datastr
, int len
)
821 const unsigned char *p
;
822 const unsigned char *data
= (const unsigned char *) datastr
;
828 /* The initial SYN is not included in the checksum. */
842 /* Send a packet containing the given ASCII string. */
845 mips_send_packet (const char *s
, int get_ack
)
847 /* unsigned */ int len
;
848 unsigned char *packet
;
853 if (len
> DATA_MAXLEN
)
854 mips_error (_("MIPS protocol data packet too long: %s"), s
);
856 packet
= (unsigned char *) alloca (HDR_LENGTH
+ len
+ TRLR_LENGTH
+ 1);
858 packet
[HDR_INDX_SYN
] = HDR_SET_SYN (1, len
, mips_send_seq
);
859 packet
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (1, len
, mips_send_seq
);
860 packet
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (1, len
, mips_send_seq
);
861 packet
[HDR_INDX_SEQ
] = HDR_SET_SEQ (1, len
, mips_send_seq
);
863 memcpy (packet
+ HDR_LENGTH
, s
, len
);
865 cksum
= mips_cksum (packet
, (char *) packet
+ HDR_LENGTH
, len
);
866 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
867 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
868 packet
[HDR_LENGTH
+ len
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
870 /* Increment the sequence number. This will set mips_send_seq to
871 the sequence number we expect in the acknowledgement. */
872 mips_send_seq
= (mips_send_seq
+ 1) % SEQ_MODULOS
;
874 /* We can only have one outstanding data packet, so we just wait for
875 the acknowledgement here. Keep retransmitting the packet until
876 we get one, or until we've tried too many times. */
877 for (try = 0; try < mips_send_retries
; try++)
882 if (remote_debug
> 0)
884 /* Don't use _filtered; we can't deal with a QUIT out of
885 target_wait, and I think this might be called from there. */
886 packet
[HDR_LENGTH
+ len
+ TRLR_LENGTH
] = '\0';
887 fprintf_unfiltered (gdb_stdlog
, "Writing \"%s\"\n", packet
+ 1);
890 if (serial_write (mips_desc
, packet
,
891 HDR_LENGTH
+ len
+ TRLR_LENGTH
) != 0)
892 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
901 unsigned char hdr
[HDR_LENGTH
+ 1];
902 unsigned char trlr
[TRLR_LENGTH
+ 1];
906 /* Get the packet header. If we time out, resend the data
908 err
= mips_receive_header (hdr
, &garbage
, ch
, mips_retransmit_wait
);
914 /* If we get a data packet, assume it is a duplicate and
915 ignore it. FIXME: If the acknowledgement is lost, this
916 data packet may be the packet the remote sends after the
918 if (HDR_IS_DATA (hdr
))
922 /* Ignore any errors raised whilst attempting to ignore
925 len
= HDR_GET_LEN (hdr
);
927 for (i
= 0; i
< len
; i
++)
931 rch
= mips_readchar (remote_timeout
);
937 if (rch
== SERIAL_TIMEOUT
)
939 /* Ignore the character. */
943 (void) mips_receive_trailer (trlr
, &garbage
, &ch
,
946 /* We don't bother checking the checksum, or providing an
947 ACK to the packet. */
951 /* If the length is not 0, this is a garbled packet. */
952 if (HDR_GET_LEN (hdr
) != 0)
955 /* Get the packet trailer. */
956 err
= mips_receive_trailer (trlr
, &garbage
, &ch
,
957 mips_retransmit_wait
);
959 /* If we timed out, resend the data packet. */
963 /* If we got a bad character, reread the header. */
967 /* If the checksum does not match the trailer checksum, this
968 is a bad packet; ignore it. */
969 if (mips_cksum (hdr
, NULL
, 0) != TRLR_GET_CKSUM (trlr
))
972 if (remote_debug
> 0)
974 hdr
[HDR_LENGTH
] = '\0';
975 trlr
[TRLR_LENGTH
] = '\0';
976 /* Don't use _filtered; we can't deal with a QUIT out of
977 target_wait, and I think this might be called from there. */
978 fprintf_unfiltered (gdb_stdlog
, "Got ack %d \"%s%s\"\n",
979 HDR_GET_SEQ (hdr
), hdr
+ 1, trlr
);
982 /* If this ack is for the current packet, we're done. */
983 seq
= HDR_GET_SEQ (hdr
);
984 if (seq
== mips_send_seq
)
987 /* If this ack is for the last packet, resend the current
989 if ((seq
+ 1) % SEQ_MODULOS
== mips_send_seq
)
992 /* Otherwise this is a bad ack; ignore it. Increment the
993 garbage count to ensure that we do not stay in this loop
999 mips_error (_("Remote did not acknowledge packet"));
1002 /* Receive and acknowledge a packet, returning the data in BUFF (which
1003 should be DATA_MAXLEN + 1 bytes). The protocol documentation
1004 implies that only the sender retransmits packets, so this code just
1005 waits silently for a packet. It returns the length of the received
1006 packet. If THROW_ERROR is nonzero, call error() on errors. If not,
1007 don't print an error message and return -1. */
1010 mips_receive_packet (char *buff
, int throw_error
, int timeout
)
1015 unsigned char ack
[HDR_LENGTH
+ TRLR_LENGTH
+ 1];
1022 unsigned char hdr
[HDR_LENGTH
];
1023 unsigned char trlr
[TRLR_LENGTH
];
1027 if (mips_receive_header (hdr
, &garbage
, ch
, timeout
) != 0)
1030 mips_error (_("Timed out waiting for remote packet"));
1037 /* An acknowledgement is probably a duplicate; ignore it. */
1038 if (!HDR_IS_DATA (hdr
))
1040 len
= HDR_GET_LEN (hdr
);
1041 /* Check if the length is valid for an ACK, we may aswell
1042 try and read the remainder of the packet: */
1045 /* Ignore the error condition, since we are going to
1046 ignore the packet anyway. */
1047 (void) mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1049 /* Don't use _filtered; we can't deal with a QUIT out of
1050 target_wait, and I think this might be called from there. */
1051 if (remote_debug
> 0)
1052 fprintf_unfiltered (gdb_stdlog
, "Ignoring unexpected ACK\n");
1056 len
= HDR_GET_LEN (hdr
);
1057 for (i
= 0; i
< len
; i
++)
1061 rch
= mips_readchar (timeout
);
1067 if (rch
== SERIAL_TIMEOUT
)
1070 mips_error (_("Timed out waiting for remote packet"));
1079 /* Don't use _filtered; we can't deal with a QUIT out of
1080 target_wait, and I think this might be called from there. */
1081 if (remote_debug
> 0)
1082 fprintf_unfiltered (gdb_stdlog
,
1083 "Got new SYN after %d chars (wanted %d)\n",
1088 err
= mips_receive_trailer (trlr
, &garbage
, &ch
, timeout
);
1092 mips_error (_("Timed out waiting for packet"));
1098 /* Don't use _filtered; we can't deal with a QUIT out of
1099 target_wait, and I think this might be called from there. */
1100 if (remote_debug
> 0)
1101 fprintf_unfiltered (gdb_stdlog
, "Got SYN when wanted trailer\n");
1105 /* If this is the wrong sequence number, ignore it. */
1106 if (HDR_GET_SEQ (hdr
) != mips_receive_seq
)
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
,
1112 "Ignoring sequence number %d (want %d)\n",
1113 HDR_GET_SEQ (hdr
), mips_receive_seq
);
1117 if (mips_cksum (hdr
, buff
, len
) == TRLR_GET_CKSUM (trlr
))
1120 if (remote_debug
> 0)
1121 /* Don't use _filtered; we can't deal with a QUIT out of
1122 target_wait, and I think this might be called from there. */
1123 printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
1124 mips_cksum (hdr
, buff
, len
),
1125 TRLR_GET_CKSUM (trlr
));
1127 /* The checksum failed. Send an acknowledgement for the
1128 previous packet to tell the remote to resend the packet. */
1129 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1130 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1131 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1132 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1134 cksum
= mips_cksum (ack
, NULL
, 0);
1136 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1137 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1138 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1140 if (remote_debug
> 0)
1142 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1143 /* Don't use _filtered; we can't deal with a QUIT out of
1144 target_wait, and I think this might be called from there. */
1145 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1149 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1152 mips_error (_("write to target failed: %s"),
1153 safe_strerror (errno
));
1159 if (remote_debug
> 0)
1162 /* Don't use _filtered; we can't deal with a QUIT out of
1163 target_wait, and I think this might be called from there. */
1164 printf_unfiltered ("Got packet \"%s\"\n", buff
);
1167 /* We got the packet. Send an acknowledgement. */
1168 mips_receive_seq
= (mips_receive_seq
+ 1) % SEQ_MODULOS
;
1170 ack
[HDR_INDX_SYN
] = HDR_SET_SYN (0, 0, mips_receive_seq
);
1171 ack
[HDR_INDX_TYPE_LEN
] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq
);
1172 ack
[HDR_INDX_LEN1
] = HDR_SET_LEN1 (0, 0, mips_receive_seq
);
1173 ack
[HDR_INDX_SEQ
] = HDR_SET_SEQ (0, 0, mips_receive_seq
);
1175 cksum
= mips_cksum (ack
, NULL
, 0);
1177 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM1
] = TRLR_SET_CSUM1 (cksum
);
1178 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM2
] = TRLR_SET_CSUM2 (cksum
);
1179 ack
[HDR_LENGTH
+ TRLR_INDX_CSUM3
] = TRLR_SET_CSUM3 (cksum
);
1181 if (remote_debug
> 0)
1183 ack
[HDR_LENGTH
+ TRLR_LENGTH
] = '\0';
1184 /* Don't use _filtered; we can't deal with a QUIT out of
1185 target_wait, and I think this might be called from there. */
1186 printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq
,
1190 if (serial_write (mips_desc
, ack
, HDR_LENGTH
+ TRLR_LENGTH
) != 0)
1193 mips_error (_("write to target failed: %s"), safe_strerror (errno
));
1201 /* Optionally send a request to the remote system and optionally wait
1202 for the reply. This implements the remote debugging protocol,
1203 which is built on top of the packet protocol defined above. Each
1204 request has an ADDR argument and a DATA argument. The following
1205 requests are defined:
1207 \0 don't send a request; just wait for a reply
1208 i read word from instruction space at ADDR
1209 d read word from data space at ADDR
1210 I write DATA to instruction space at ADDR
1211 D write DATA to data space at ADDR
1212 r read register number ADDR
1213 R set register number ADDR to value DATA
1214 c continue execution (if ADDR != 1, set pc to ADDR)
1215 s single step (if ADDR != 1, set pc to ADDR)
1217 The read requests return the value requested. The write requests
1218 return the previous value in the changed location. The execution
1219 requests return a UNIX wait value (the approximate signal which
1220 caused execution to stop is in the upper eight bits).
1222 If PERR is not NULL, this function waits for a reply. If an error
1223 occurs, it sets *PERR to 1 and sets errno according to what the
1224 target board reports. */
1227 mips_request (int cmd
,
1234 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
1235 char myBuff
[DATA_MAXLEN
+ 1];
1236 char response_string
[17];
1243 if (buff
== (char *) NULL
)
1248 if (mips_need_reply
)
1249 internal_error (__FILE__
, __LINE__
,
1250 _("mips_request: Trying to send "
1251 "command before reply"));
1252 /* 'T' sets a register to a 64-bit value, so make sure we use
1253 the right conversion function. */
1255 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1256 phex_nz (addr
, addr_size
), phex_nz (data
, 8));
1258 sprintf (buff
, "0x0 %c 0x%s 0x%s", cmd
,
1259 phex_nz (addr
, addr_size
), phex_nz (data
, addr_size
));
1261 mips_send_packet (buff
, 1);
1262 mips_need_reply
= 1;
1265 if (perr
== (int *) NULL
)
1268 if (!mips_need_reply
)
1269 internal_error (__FILE__
, __LINE__
,
1270 _("mips_request: Trying to get reply before command"));
1272 mips_need_reply
= 0;
1274 len
= mips_receive_packet (buff
, 1, timeout
);
1277 if (sscanf (buff
, "0x%x %c 0x%x 0x%16s",
1278 &rpid
, &rcmd
, &rerrflg
, response_string
) != 4
1279 || !read_hex_value (response_string
, &rresponse
)
1280 || (cmd
!= '\0' && rcmd
!= cmd
))
1281 mips_error (_("Bad response from remote board"));
1287 /* FIXME: This will returns MIPS errno numbers, which may or may
1288 not be the same as errno values used on other systems. If
1289 they stick to common errno values, they will be the same, but
1290 if they don't, they must be translated. */
1300 /* Cleanup associated with mips_initialize(). */
1303 mips_initialize_cleanups (void *arg
)
1305 mips_initializing
= 0;
1308 /* Cleanup associated with mips_exit_debug(). */
1311 mips_exit_cleanups (void *arg
)
1316 /* Send a command and wait for that command to be echoed back. Wait,
1317 too, for the following prompt. */
1320 mips_send_command (const char *cmd
, int prompt
)
1322 serial_write (mips_desc
, cmd
, strlen (cmd
));
1326 mips_expect (mips_monitor_prompt
);
1329 /* Enter remote (dbx) debug mode: */
1332 mips_enter_debug (void)
1334 /* Reset the sequence numbers, ready for the new debug sequence: */
1336 mips_receive_seq
= 0;
1338 if (mips_monitor
!= MON_IDT
)
1339 mips_send_command ("debug\r", 0);
1340 else /* Assume IDT monitor by default. */
1341 mips_send_command ("db tty0\r", 0);
1343 gdb_usleep (1000000);
1344 serial_write (mips_desc
, "\r", sizeof "\r" - 1);
1346 /* We don't need to absorb any spurious characters here, since the
1347 mips_receive_header will eat up a reasonable number of characters
1348 whilst looking for the SYN, however this avoids the "garbage"
1349 being displayed to the user. */
1350 if (mips_monitor
!= MON_IDT
)
1354 char buff
[DATA_MAXLEN
+ 1];
1356 if (mips_receive_packet (buff
, 1, 3) < 0)
1357 mips_error (_("Failed to initialize (didn't receive packet)."));
1361 /* Exit remote (dbx) debug mode, returning to the monitor prompt: */
1364 mips_exit_debug (void)
1367 struct cleanup
*old_cleanups
= make_cleanup (mips_exit_cleanups
, NULL
);
1371 if (mips_monitor
!= MON_IDT
&& mips_monitor
!= MON_ROCKHOPPER
)
1373 /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately,
1374 so we do not get a reply to this command: */
1375 mips_request ('x', 0, 0, NULL
, mips_receive_wait
, NULL
);
1376 mips_need_reply
= 0;
1377 if (!mips_expect (" break!"))
1379 do_cleanups (old_cleanups
);
1384 mips_request ('x', 0, 0, &err
, mips_receive_wait
, NULL
);
1386 if (!mips_expect (mips_monitor_prompt
))
1388 do_cleanups (old_cleanups
);
1392 do_cleanups (old_cleanups
);
1397 /* Initialize a new connection to the MIPS board, and make sure we are
1398 really connected. */
1401 mips_initialize (void)
1404 struct cleanup
*old_cleanups
;
1407 /* What is this code doing here? I don't see any way it can happen, and
1408 it might mean mips_initializing didn't get cleared properly.
1409 So I'll make it a warning. */
1411 if (mips_initializing
)
1413 warning (_("internal error: mips_initialize called twice"));
1417 old_cleanups
= make_cleanup (mips_initialize_cleanups
, NULL
);
1420 mips_initializing
= 1;
1422 /* At this point, the packit protocol isn't responding. We'll try getting
1423 into the monitor, and restarting the protocol. */
1425 /* Force the system into the monitor. After this we *should* be at
1426 the mips_monitor_prompt. */
1427 if (mips_monitor
!= MON_IDT
)
1428 j
= 0; /* Start by checking if we are already
1431 j
= 1; /* Start by sending a break. */
1436 case 0: /* First, try sending a CR. */
1437 serial_flush_input (mips_desc
);
1438 serial_write (mips_desc
, "\r", 1);
1440 case 1: /* First, try sending a break. */
1441 serial_send_break (mips_desc
);
1443 case 2: /* Then, try a ^C. */
1444 serial_write (mips_desc
, "\003", 1);
1446 case 3: /* Then, try escaping from download. */
1448 if (mips_monitor
!= MON_IDT
)
1452 /* We shouldn't need to send multiple termination
1453 sequences, since the target performs line (or
1454 block) reads, and then processes those
1455 packets. In-case we were downloading a large packet
1456 we flush the output buffer before inserting a
1457 termination sequence. */
1458 serial_flush_output (mips_desc
);
1459 sprintf (tbuff
, "\r/E/E\r");
1460 serial_write (mips_desc
, tbuff
, 6);
1467 /* We are possibly in binary download mode, having
1468 aborted in the middle of an S-record. ^C won't
1469 work because of binary mode. The only reliable way
1470 out is to send enough termination packets (8 bytes)
1471 to fill up and then overflow the largest size
1472 S-record (255 bytes in this case). This amounts to
1473 256/8 + 1 packets. */
1475 mips_make_srec (srec
, '7', 0, NULL
, 0);
1477 for (i
= 1; i
<= 33; i
++)
1479 serial_write (mips_desc
, srec
, 8);
1481 if (serial_readchar (mips_desc
, 0) >= 0)
1482 break; /* Break immediatly if we get something from
1489 mips_error (_("Failed to initialize."));
1492 if (mips_expect (mips_monitor_prompt
))
1496 if (mips_monitor
!= MON_IDT
)
1498 /* Sometimes PMON ignores the first few characters in the first
1499 command sent after a load. Sending a blank command gets
1501 mips_send_command ("\r", -1);
1503 /* Ensure the correct target state: */
1504 if (mips_monitor
!= MON_LSI
)
1505 mips_send_command ("set regsize 64\r", -1);
1506 mips_send_command ("set hostport tty0\r", -1);
1507 mips_send_command ("set brkcmd \"\"\r", -1);
1508 /* Delete all the current breakpoints: */
1509 mips_send_command ("db *\r", -1);
1510 /* NOTE: PMON does not have breakpoint support through the
1511 "debug" mode, only at the monitor command-line. */
1514 mips_enter_debug ();
1516 /* Clear all breakpoints: */
1517 if ((mips_monitor
== MON_IDT
1518 && mips_clear_breakpoint (-1, 0, BREAK_UNUSED
) == 0)
1519 || mips_monitor
== MON_LSI
)
1520 monitor_supports_breakpoints
= 1;
1522 monitor_supports_breakpoints
= 0;
1524 do_cleanups (old_cleanups
);
1526 /* If this doesn't call error, we have connected; we don't care if
1527 the request itself succeeds or fails. */
1529 mips_request ('r', 0, 0, &err
, mips_receive_wait
, NULL
);
1532 /* Open a connection to the remote board. */
1535 common_open (struct target_ops
*ops
, const char *name
, int from_tty
,
1536 enum mips_monitor_type new_monitor
,
1537 const char *new_monitor_prompt
)
1539 char *serial_port_name
;
1540 char *remote_name
= 0;
1541 char *local_name
= 0;
1543 struct cleanup
*cleanup
;
1547 To open a MIPS remote debugging connection, you need to specify what\n\
1548 serial device is attached to the target board (e.g., /dev/ttya).\n\
1549 If you want to use TFTP to download to the board, specify the name of a\n\
1550 temporary file to be used by GDB for downloads as the second argument.\n\
1551 This filename must be in the form host:filename, where host is the name\n\
1552 of the host running the TFTP server, and the file must be readable by the\n\
1553 world. If the local name of the temporary file differs from the name as\n\
1554 seen from the board via TFTP, specify that name as the third parameter.\n"));
1556 /* Parse the serial port name, the optional TFTP name, and the
1557 optional local TFTP name. */
1558 argv
= gdb_buildargv (name
);
1559 cleanup
= make_cleanup_freeargv (argv
);
1561 serial_port_name
= xstrdup (argv
[0]);
1562 if (argv
[1]) /* Remote TFTP name specified? */
1564 remote_name
= argv
[1];
1565 if (argv
[2]) /* Local TFTP filename specified? */
1566 local_name
= argv
[2];
1569 target_preopen (from_tty
);
1572 unpush_target (current_ops
);
1574 /* Open and initialize the serial port. */
1575 mips_desc
= serial_open (serial_port_name
);
1576 if (mips_desc
== NULL
)
1577 perror_with_name (serial_port_name
);
1579 if (baud_rate
!= -1)
1581 if (serial_setbaudrate (mips_desc
, baud_rate
))
1583 serial_close (mips_desc
);
1584 perror_with_name (serial_port_name
);
1588 serial_raw (mips_desc
);
1590 /* Open and initialize the optional download port. If it is in the form
1591 hostname#portnumber, it's a UDP socket. If it is in the form
1592 hostname:filename, assume it's the TFTP filename that must be
1593 passed to the DDB board to tell it where to get the load file. */
1596 if (strchr (remote_name
, '#'))
1598 udp_desc
= serial_open (remote_name
);
1600 perror_with_name (_("Unable to open UDP port"));
1605 /* Save the remote and local names of the TFTP temp file. If
1606 the user didn't specify a local name, assume it's the same
1607 as the part of the remote name after the "host:". */
1611 xfree (tftp_localname
);
1612 if (local_name
== NULL
)
1613 if ((local_name
= strchr (remote_name
, ':')) != NULL
)
1614 local_name
++; /* Skip over the colon. */
1615 if (local_name
== NULL
)
1616 local_name
= remote_name
; /* Local name same as remote name. */
1617 tftp_name
= xstrdup (remote_name
);
1618 tftp_localname
= xstrdup (local_name
);
1626 /* Reset the expected monitor prompt if it's never been set before. */
1627 if (mips_monitor_prompt
== NULL
)
1628 mips_monitor_prompt
= xstrdup (new_monitor_prompt
);
1629 mips_monitor
= new_monitor
;
1634 printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name
);
1636 /* Switch to using remote target now. */
1639 inferior_ptid
= remote_mips_ptid
;
1640 inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid
));
1641 add_thread_silent (inferior_ptid
);
1643 /* Try to figure out the processor model if possible. */
1644 deprecated_mips_set_processor_regs_hack ();
1646 /* This is really the job of start_remote however, that makes an
1647 assumption that the target is about to print out a status message
1648 of some sort. That doesn't happen here (in fact, it may not be
1649 possible to get the monitor to send the appropriate packet). */
1651 reinit_frame_cache ();
1652 registers_changed ();
1653 stop_pc
= regcache_read_pc (get_current_regcache ());
1654 print_stack_frame (get_selected_frame (NULL
), 0, SRC_AND_LOC
, 1);
1655 xfree (serial_port_name
);
1657 do_cleanups (cleanup
);
1660 /* Open a connection to an IDT board. */
1663 mips_open (const char *name
, int from_tty
)
1665 const char *monitor_prompt
= NULL
;
1666 if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL
1667 && gdbarch_bfd_arch_info (target_gdbarch ())->arch
== bfd_arch_mips
)
1669 switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach
)
1671 case bfd_mach_mips4100
:
1672 case bfd_mach_mips4300
:
1673 case bfd_mach_mips4600
:
1674 case bfd_mach_mips4650
:
1675 case bfd_mach_mips5000
:
1676 monitor_prompt
= "<RISQ> ";
1680 if (monitor_prompt
== NULL
)
1681 monitor_prompt
= "<IDT>";
1682 common_open (&mips_ops
, name
, from_tty
, MON_IDT
, monitor_prompt
);
1685 /* Open a connection to a PMON board. */
1688 pmon_open (const char *name
, int from_tty
)
1690 common_open (&pmon_ops
, name
, from_tty
, MON_PMON
, "PMON> ");
1693 /* Open a connection to a DDB board. */
1696 ddb_open (const char *name
, int from_tty
)
1698 common_open (&ddb_ops
, name
, from_tty
, MON_DDB
, "NEC010>");
1701 /* Open a connection to a rockhopper board. */
1704 rockhopper_open (const char *name
, int from_tty
)
1706 common_open (&rockhopper_ops
, name
, from_tty
, MON_ROCKHOPPER
, "NEC01>");
1709 /* Open a connection to an LSI board. */
1712 lsi_open (const char *name
, int from_tty
)
1716 /* Clear the LSI breakpoint table. */
1717 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1718 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
1720 common_open (&lsi_ops
, name
, from_tty
, MON_LSI
, "PMON> ");
1723 /* Close a connection to the remote board. */
1726 mips_close (struct target_ops
*self
)
1730 /* Get the board out of remote debugging mode. */
1731 (void) mips_exit_debug ();
1736 generic_mourn_inferior ();
1739 /* Detach from the remote board. */
1742 mips_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
1745 error (_("Argument given to \"detach\" when remotely debugging."));
1747 unpush_target (ops
);
1750 printf_unfiltered ("Ending remote MIPS debugging.\n");
1753 /* Tell the target board to resume. This does not wait for a reply
1754 from the board, except in the case of single-stepping on LSI boards,
1755 where PMON does return a reply. */
1758 mips_resume (struct target_ops
*ops
,
1759 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
1763 /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after
1764 a single step, so we wait for that. */
1765 mips_request (step
? 's' : 'c', 1, siggnal
,
1766 mips_monitor
== MON_LSI
&& step
? &err
: (int *) NULL
,
1767 mips_receive_wait
, NULL
);
1770 /* Return the signal corresponding to SIG, where SIG is the number which
1771 the MIPS protocol uses for the signal. */
1773 static enum gdb_signal
1774 mips_signal_from_protocol (int sig
)
1776 /* We allow a few more signals than the IDT board actually returns, on
1777 the theory that there is at least *some* hope that perhaps the numbering
1778 for these signals is widely agreed upon. */
1781 return GDB_SIGNAL_UNKNOWN
;
1783 /* Don't want to use gdb_signal_from_host because we are converting
1784 from MIPS signal numbers, not host ones. Our internal numbers
1785 match the MIPS numbers for the signals the board can return, which
1786 are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */
1787 return (enum gdb_signal
) sig
;
1790 /* Set the register designated by REGNO to the value designated by VALUE. */
1793 mips_set_register (int regno
, ULONGEST value
)
1795 gdb_byte buf
[MAX_REGISTER_SIZE
];
1796 struct regcache
*regcache
= get_current_regcache ();
1797 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1798 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1800 /* We got the number the register holds, but gdb expects to see a
1801 value in the target byte ordering. */
1803 if (mips_monitor
!= MON_ROCKHOPPER
1804 && (regno
== mips_regnum (gdbarch
)->pc
|| regno
< 32))
1805 /* Some 64-bit boards have monitors that only send the bottom 32 bits.
1806 In such cases we can only really debug 32-bit code properly so,
1807 when reading a GPR or the PC, assume that the full 64-bit
1808 value is the sign extension of the lower 32 bits. */
1809 store_signed_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1812 store_unsigned_integer (buf
, register_size (gdbarch
, regno
), byte_order
,
1815 regcache_raw_supply (regcache
, regno
, buf
);
1818 /* Wait until the remote stops, and return a wait status. */
1821 mips_wait (struct target_ops
*ops
,
1822 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1826 char buff
[DATA_MAXLEN
];
1827 ULONGEST rpc
, rfp
, rsp
;
1828 char pc_string
[17], fp_string
[17], sp_string
[17], flags
[20];
1831 interrupt_count
= 0;
1834 /* If we have not sent a single step or continue command, then the
1835 board is waiting for us to do something. Return a status
1836 indicating that it is stopped. */
1837 if (!mips_need_reply
)
1839 status
->kind
= TARGET_WAITKIND_STOPPED
;
1840 status
->value
.sig
= GDB_SIGNAL_TRAP
;
1841 return inferior_ptid
;
1844 /* No timeout; we sit here as long as the program continues to execute. */
1846 rstatus
= mips_request ('\000', 0, 0, &err
, -1, buff
);
1849 mips_error (_("Remote failure: %s"), safe_strerror (errno
));
1851 /* On returning from a continue, the PMON monitor seems to start
1852 echoing back the messages we send prior to sending back the
1853 ACK. The code can cope with this, but to try and avoid the
1854 unnecessary serial traffic, and "spurious" characters displayed
1855 to the user, we cheat and reset the debug protocol. The problems
1856 seems to be caused by a check on the number of arguments, and the
1857 command length, within the monitor causing it to echo the command
1859 if (mips_monitor
== MON_PMON
)
1862 mips_enter_debug ();
1865 /* See if we got back extended status. If so, pick out the pc, fp,
1868 nfields
= sscanf (buff
,
1869 "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s",
1870 pc_string
, fp_string
, sp_string
, flags
);
1872 && read_hex_value (pc_string
, &rpc
)
1873 && read_hex_value (fp_string
, &rfp
)
1874 && read_hex_value (sp_string
, &rsp
))
1876 struct regcache
*regcache
= get_current_regcache ();
1877 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1879 mips_set_register (gdbarch_pc_regnum (gdbarch
), rpc
);
1880 mips_set_register (30, rfp
);
1881 mips_set_register (gdbarch_sp_regnum (gdbarch
), rsp
);
1887 for (i
= 0; i
<= 2; i
++)
1888 if (flags
[i
] == 'r' || flags
[i
] == 'w')
1890 else if (flags
[i
] == '\000')
1895 if (strcmp (target_shortname
, "lsi") == 0)
1898 /* If this is an LSI PMON target, see if we just hit a
1899 hardrdware watchpoint. Right now, PMON doesn't give us
1900 enough information to determine which breakpoint we hit. So
1901 we have to look up the PC in our own table of breakpoints,
1902 and if found, assume it's just a normal instruction fetch
1903 breakpoint, not a data watchpoint. FIXME when PMON provides
1904 some way to tell us what type of breakpoint it is. */
1906 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1909 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
1911 if (lsi_breakpoints
[i
].addr
== pc
1912 && lsi_breakpoints
[i
].type
== BREAK_FETCH
)
1919 /* If a data breakpoint was hit, PMON returns the following packet:
1921 The return packet from an ordinary breakpoint doesn't have the
1922 extra 0x01 field tacked onto the end. */
1923 if (nfields
== 1 && rpc
== 1)
1928 /* NOTE: The following (sig) numbers are defined by PMON:
1929 SPP_SIGTRAP 5 breakpoint
1937 /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG
1938 and so on, because the constants we want here are determined by the
1939 MIPS protocol and have nothing to do with what host we are running on. */
1940 if ((rstatus
& 0xff) == 0)
1942 status
->kind
= TARGET_WAITKIND_EXITED
;
1943 status
->value
.integer
= (((rstatus
) >> 8) & 0xff);
1945 else if ((rstatus
& 0xff) == 0x7f)
1947 status
->kind
= TARGET_WAITKIND_STOPPED
;
1948 status
->value
.sig
= mips_signal_from_protocol (((rstatus
) >> 8) & 0xff);
1950 /* If the stop PC is in the _exit function, assume
1951 we hit the 'break 0x3ff' instruction in _exit, so this
1952 is not a normal breakpoint. */
1953 if (strcmp (target_shortname
, "lsi") == 0)
1955 const char *func_name
;
1956 CORE_ADDR func_start
;
1957 CORE_ADDR pc
= regcache_read_pc (get_current_regcache ());
1959 find_pc_partial_function (pc
, &func_name
, &func_start
, NULL
);
1960 if (func_name
!= NULL
&& strcmp (func_name
, "_exit") == 0
1961 && func_start
== pc
)
1962 status
->kind
= TARGET_WAITKIND_EXITED
;
1967 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
1968 status
->value
.sig
= mips_signal_from_protocol (rstatus
& 0x7f);
1971 return inferior_ptid
;
1974 /* We have to map between the register numbers used by gdb and the
1975 register numbers used by the debugging protocol. */
1977 #define REGNO_OFFSET 96
1980 mips_map_regno (struct gdbarch
*gdbarch
, int regno
)
1984 if (regno
>= mips_regnum (gdbarch
)->fp0
1985 && regno
< mips_regnum (gdbarch
)->fp0
+ 32)
1986 return regno
- mips_regnum (gdbarch
)->fp0
+ 32;
1987 else if (regno
== mips_regnum (gdbarch
)->pc
)
1988 return REGNO_OFFSET
+ 0;
1989 else if (regno
== mips_regnum (gdbarch
)->cause
)
1990 return REGNO_OFFSET
+ 1;
1991 else if (regno
== mips_regnum (gdbarch
)->hi
)
1992 return REGNO_OFFSET
+ 2;
1993 else if (regno
== mips_regnum (gdbarch
)->lo
)
1994 return REGNO_OFFSET
+ 3;
1995 else if (regno
== mips_regnum (gdbarch
)->fp_control_status
)
1996 return REGNO_OFFSET
+ 4;
1997 else if (regno
== mips_regnum (gdbarch
)->fp_implementation_revision
)
1998 return REGNO_OFFSET
+ 5;
2000 /* FIXME: Is there a way to get the status register? */
2004 /* Fetch the remote registers. */
2007 mips_fetch_registers (struct target_ops
*ops
,
2008 struct regcache
*regcache
, int regno
)
2010 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2011 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2017 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2018 mips_fetch_registers (ops
, regcache
, regno
);
2022 if (regno
== gdbarch_deprecated_fp_regnum (gdbarch
)
2023 || regno
== MIPS_ZERO_REGNUM
)
2024 /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just
2025 supposed to read zero (see also mips-nat.c). */
2029 /* If PMON doesn't support this register, don't waste serial
2030 bandwidth trying to read it. */
2031 int pmon_reg
= mips_map_regno (gdbarch
, regno
);
2033 if (regno
!= 0 && pmon_reg
== 0)
2037 /* Unfortunately the PMON version in the Vr4300 board has been
2038 compiled without the 64bit register access commands. This
2039 means we cannot get hold of the full register width. */
2040 if (mips_monitor
== MON_DDB
|| mips_monitor
== MON_ROCKHOPPER
)
2041 val
= mips_request ('t', pmon_reg
, 0,
2042 &err
, mips_receive_wait
, NULL
);
2044 val
= mips_request ('r', pmon_reg
, 0,
2045 &err
, mips_receive_wait
, NULL
);
2047 mips_error (_("Can't read register %d: %s"), regno
,
2048 safe_strerror (errno
));
2052 mips_set_register (regno
, val
);
2055 /* Prepare to store registers. The MIPS protocol can store individual
2056 registers, so this function doesn't have to do anything. */
2059 mips_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
2063 /* Store remote register(s). */
2066 mips_store_registers (struct target_ops
*ops
,
2067 struct regcache
*regcache
, int regno
)
2069 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2075 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
2076 mips_store_registers (ops
, regcache
, regno
);
2080 regcache_cooked_read_unsigned (regcache
, regno
, &val
);
2081 mips_request (mips_monitor
== MON_ROCKHOPPER
? 'T' : 'R',
2082 mips_map_regno (gdbarch
, regno
),
2084 &err
, mips_receive_wait
, NULL
);
2086 mips_error (_("Can't write register %d: %s"), regno
,
2087 safe_strerror (errno
));
2090 /* Fetch a word from the target board. Return word fetched in location
2091 addressed by VALP. Return 0 when successful; return positive error
2095 mips_fetch_word (CORE_ADDR addr
, unsigned int *valp
)
2099 *valp
= mips_request ('d', addr
, 0, &err
, mips_receive_wait
, NULL
);
2102 /* Data space failed; try instruction space. */
2103 *valp
= mips_request ('i', addr
, 0, &err
,
2104 mips_receive_wait
, NULL
);
2109 /* Store a word to the target board. Returns errno code or zero for
2110 success. If OLD_CONTENTS is non-NULL, put the old contents of that
2111 memory location there. */
2113 /* FIXME! make sure only 32-bit quantities get stored! */
2115 mips_store_word (CORE_ADDR addr
, unsigned int val
, int *old_contents
)
2118 unsigned int oldcontents
;
2120 oldcontents
= mips_request ('D', addr
, val
, &err
,
2121 mips_receive_wait
, NULL
);
2124 /* Data space failed; try instruction space. */
2125 oldcontents
= mips_request ('I', addr
, val
, &err
,
2126 mips_receive_wait
, NULL
);
2130 if (old_contents
!= NULL
)
2131 *old_contents
= oldcontents
;
2135 /* Helper for mips_xfer_partial that handles memory transfers.
2136 Arguments are like target_xfer_partial. Note that the protocol
2137 gives us the correct value for a longword, since it transfers
2138 values in ASCII. We want the byte values, so we have to swap the
2141 static int mask_address_p
= 1;
2143 static enum target_xfer_status
2144 mips_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2145 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
2147 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch ());
2154 /* PMON targets do not cope well with 64 bit addresses. Mask the
2155 value down to 32 bits. */
2157 memaddr
&= (CORE_ADDR
) 0xffffffff;
2159 /* Round starting address down to longword boundary. */
2160 addr
= memaddr
& ~3;
2161 /* Round ending address up; get number of longwords that makes. */
2162 count
= (((memaddr
+ len
) - addr
) + 3) / 4;
2163 /* Allocate buffer of that many longwords. */
2164 buffer
= alloca (count
* 4);
2166 if (writebuf
!= NULL
)
2168 /* Fill start and end extra bytes of buffer with existing data. */
2169 if (addr
!= memaddr
|| len
< 4)
2173 if (mips_fetch_word (addr
, &val
))
2174 return TARGET_XFER_E_IO
;
2176 /* Need part of initial word -- fetch it. */
2177 store_unsigned_integer (&buffer
[0], 4, byte_order
, val
);
2184 /* Need part of last word -- fetch it. FIXME: we do this even
2185 if we don't need it. */
2186 if (mips_fetch_word (addr
+ (count
- 1) * 4, &val
))
2187 return TARGET_XFER_E_IO
;
2189 store_unsigned_integer (&buffer
[(count
- 1) * 4],
2190 4, byte_order
, val
);
2193 /* Copy data to be written over corresponding part of buffer. */
2195 memcpy ((char *) buffer
+ (memaddr
& 3), writebuf
, len
);
2197 /* Write the entire buffer. */
2199 for (i
= 0; i
< count
; i
++, addr
+= 4)
2203 word
= extract_unsigned_integer (&buffer
[i
* 4], 4, byte_order
);
2204 status
= mips_store_word (addr
, word
, NULL
);
2205 /* Report each kilobyte (we download 32-bit words at a time). */
2208 printf_unfiltered ("*");
2209 gdb_flush (gdb_stdout
);
2212 return TARGET_XFER_E_IO
;
2213 /* FIXME: Do we want a QUIT here? */
2216 printf_unfiltered ("\n");
2220 /* Read all the longwords. */
2221 for (i
= 0; i
< count
; i
++, addr
+= 4)
2225 if (mips_fetch_word (addr
, &val
))
2226 return TARGET_XFER_E_IO
;
2228 store_unsigned_integer (&buffer
[i
* 4], 4, byte_order
, val
);
2232 /* Copy appropriate bytes out of the buffer. */
2233 memcpy (readbuf
, buffer
+ (memaddr
& 3), len
);
2236 return TARGET_XFER_OK
;
2239 /* Target to_xfer_partial implementation. */
2241 static enum target_xfer_status
2242 mips_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2243 const char *annex
, gdb_byte
*readbuf
,
2244 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
2245 ULONGEST
*xfered_len
)
2249 case TARGET_OBJECT_MEMORY
:
2250 return mips_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
2253 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
2254 readbuf
, writebuf
, offset
, len
,
2259 /* Print info on this target. */
2262 mips_files_info (struct target_ops
*ignore
)
2264 printf_unfiltered ("Debugging a MIPS board over a serial line.\n");
2267 /* Kill the process running on the board. This will actually only
2268 work if we are doing remote debugging over the console input. I
2269 think that if IDT/sim had the remote debug interrupt enabled on the
2270 right port, we could interrupt the process with a break signal. */
2273 mips_kill (struct target_ops
*ops
)
2275 if (!mips_wait_flag
)
2277 target_mourn_inferior ();
2283 if (interrupt_count
>= 2)
2285 interrupt_count
= 0;
2287 target_terminal_ours ();
2289 if (query (_("Interrupted while waiting for the program.\n\
2290 Give up (and stop debugging it)? ")))
2292 /* Clean up in such a way that mips_close won't try to talk
2293 to the board (it almost surely won't work since we
2294 weren't able to talk to it). */
2298 printf_unfiltered ("Ending remote MIPS debugging.\n");
2299 target_mourn_inferior ();
2303 target_terminal_inferior ();
2306 if (remote_debug
> 0)
2307 printf_unfiltered ("Sending break\n");
2309 serial_send_break (mips_desc
);
2311 target_mourn_inferior ();
2320 serial_write (mips_desc
, &cc
, 1);
2322 target_mourn_inferior ();
2327 /* Start running on the target board. */
2330 mips_create_inferior (struct target_ops
*ops
, char *execfile
,
2331 char *args
, char **env
, int from_tty
)
2338 Can't pass arguments to remote MIPS board; arguments ignored."));
2339 /* And don't try to use them on the next "run" command. */
2340 execute_command ("set args", 0);
2343 if (execfile
== 0 || exec_bfd
== 0)
2344 error (_("No executable file specified"));
2346 entry_pt
= (CORE_ADDR
) bfd_get_start_address (exec_bfd
);
2348 init_wait_for_inferior ();
2350 regcache_write_pc (get_current_regcache (), entry_pt
);
2353 /* Clean up after a process. The bulk of the work is done in mips_close(),
2354 which is called when unpushing the target. */
2357 mips_mourn_inferior (struct target_ops
*ops
)
2359 if (current_ops
!= NULL
)
2360 unpush_target (current_ops
);
2363 /* We can write a breakpoint and read the shadow contents in one
2366 /* Insert a breakpoint. On targets that don't have built-in
2367 breakpoint support, we read the contents of the target location and
2368 stash it, then overwrite it with a breakpoint instruction. ADDR is
2369 the target location in the target machine. BPT is the breakpoint
2370 being inserted or removed, which contains memory for saving the
2374 mips_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2375 struct bp_target_info
*bp_tgt
)
2377 if (monitor_supports_breakpoints
)
2379 bp_tgt
->placed_address
= bp_tgt
->reqstd_address
;
2380 return mips_set_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2384 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
2387 /* Remove a breakpoint. */
2390 mips_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
2391 struct bp_target_info
*bp_tgt
)
2393 if (monitor_supports_breakpoints
)
2394 return mips_clear_breakpoint (bp_tgt
->placed_address
, MIPS_INSN32_SIZE
,
2397 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
);
2400 /* Tell whether this target can support a hardware breakpoint. CNT
2401 is the number of hardware breakpoints already installed. This
2402 implements the target_can_use_hardware_watchpoint macro. */
2405 mips_can_use_watchpoint (struct target_ops
*self
,
2406 int type
, int cnt
, int othertype
)
2408 return cnt
< MAX_LSI_BREAKPOINTS
&& strcmp (target_shortname
, "lsi") == 0;
2412 /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1.
2413 This is used for memory ref breakpoints. */
2415 static unsigned long
2416 calculate_mask (CORE_ADDR addr
, int len
)
2421 mask
= addr
^ (addr
+ len
- 1);
2423 for (i
= 32; i
>= 0; i
--)
2429 mask
= (unsigned long) 0xffffffff >> i
;
2435 /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0
2436 for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
2440 mips_insert_watchpoint (struct target_ops
*self
,
2441 CORE_ADDR addr
, int len
, int type
,
2442 struct expression
*cond
)
2444 if (mips_set_breakpoint (addr
, len
, type
))
2450 /* Remove a watchpoint. */
2453 mips_remove_watchpoint (struct target_ops
*self
,
2454 CORE_ADDR addr
, int len
, int type
,
2455 struct expression
*cond
)
2457 if (mips_clear_breakpoint (addr
, len
, type
))
2463 /* Test to see if a watchpoint has been hit. Return 1 if so; return 0,
2467 mips_stopped_by_watchpoint (struct target_ops
*ops
)
2469 return hit_watchpoint
;
2473 /* Insert a breakpoint. */
2476 mips_set_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2478 return mips_common_breakpoint (1, addr
, len
, type
);
2482 /* Clear a breakpoint. */
2485 mips_clear_breakpoint (CORE_ADDR addr
, int len
, enum break_type type
)
2487 return mips_common_breakpoint (0, addr
, len
, type
);
2491 /* Check the error code from the return packet for an LSI breakpoint
2492 command. If there's no error, just return 0. If it's a warning,
2493 print the warning text and return 0. If it's an error, print
2494 the error text and return 1. <ADDR> is the address of the breakpoint
2495 that was being set. <RERRFLG> is the error code returned by PMON.
2496 This is a helper function for mips_common_breakpoint. */
2499 mips_check_lsi_error (CORE_ADDR addr
, int rerrflg
)
2501 struct lsi_error
*err
;
2502 const char *saddr
= paddress (target_gdbarch (), addr
);
2504 if (rerrflg
== 0) /* no error */
2507 /* Warnings can be ORed together, so check them all. */
2508 if (rerrflg
& W_WARN
)
2510 if (monitor_warnings
)
2514 for (err
= lsi_warning_table
; err
->code
!= 0; err
++)
2516 if ((err
->code
& rerrflg
) == err
->code
)
2519 fprintf_unfiltered (gdb_stderr
, "\
2520 mips_common_breakpoint (%s): Warning: %s\n",
2526 fprintf_unfiltered (gdb_stderr
, "\
2527 mips_common_breakpoint (%s): Unknown warning: 0x%x\n",
2534 /* Errors are unique, i.e. can't be ORed together. */
2535 for (err
= lsi_error_table
; err
->code
!= 0; err
++)
2537 if ((err
->code
& rerrflg
) == err
->code
)
2539 fprintf_unfiltered (gdb_stderr
, "\
2540 mips_common_breakpoint (%s): Error: %s\n",
2546 fprintf_unfiltered (gdb_stderr
, "\
2547 mips_common_breakpoint (%s): Unknown error: 0x%x\n",
2554 /* This routine sends a breakpoint command to the remote target.
2556 <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint.
2557 <ADDR> is the address of the breakpoint.
2558 <LEN> the length of the region to break on.
2559 <TYPE> is the type of breakpoint:
2560 0 = write (BREAK_WRITE)
2561 1 = read (BREAK_READ)
2562 2 = read/write (BREAK_ACCESS)
2563 3 = instruction fetch (BREAK_FETCH)
2565 Return 0 if successful; otherwise 1. */
2568 mips_common_breakpoint (int set
, CORE_ADDR addr
, int len
, enum break_type type
)
2570 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
2571 char buf
[DATA_MAXLEN
+ 1];
2573 int rpid
, rerrflg
, rresponse
, rlen
;
2576 addr
= gdbarch_addr_bits_remove (target_gdbarch (), addr
);
2578 if (mips_monitor
== MON_LSI
)
2580 if (set
== 0) /* clear breakpoint */
2582 /* The LSI PMON "clear breakpoint" has this form:
2583 <pid> 'b' <bptn> 0x0
2585 <pid> 'b' 0x0 <code>
2587 <bptn> is a breakpoint number returned by an earlier 'B' command.
2588 Possible return codes: OK, E_BPT. */
2592 /* Search for the breakpoint in the table. */
2593 for (i
= 0; i
< MAX_LSI_BREAKPOINTS
; i
++)
2594 if (lsi_breakpoints
[i
].type
== type
2595 && lsi_breakpoints
[i
].addr
== addr
2596 && lsi_breakpoints
[i
].len
== len
)
2599 /* Clear the table entry and tell PMON to clear the breakpoint. */
2600 if (i
== MAX_LSI_BREAKPOINTS
)
2603 mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"),
2604 paddress (target_gdbarch (), addr
));
2608 lsi_breakpoints
[i
].type
= BREAK_UNUSED
;
2609 sprintf (buf
, "0x0 b 0x%x 0x0", i
);
2610 mips_send_packet (buf
, 1);
2612 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2615 nfields
= sscanf (buf
, "0x%x b 0x0 0x%x", &rpid
, &rerrflg
);
2617 mips_error (_("mips_common_breakpoint: "
2618 "Bad response from remote board: %s"),
2621 return (mips_check_lsi_error (addr
, rerrflg
));
2624 /* set a breakpoint */
2626 /* The LSI PMON "set breakpoint" command has this form:
2627 <pid> 'B' <addr> 0x0
2629 <pid> 'B' <bptn> <code>
2631 The "set data breakpoint" command has this form:
2633 <pid> 'A' <addr1> <type> [<addr2> [<value>]]
2635 where: type= "0x1" = read
2637 "0x3" = access (read or write)
2639 The reply returns two values:
2640 bptn - a breakpoint number, which is a small integer with
2641 possible values of zero through 255.
2642 code - an error return code, a value of zero indicates a
2643 succesful completion, other values indicate various
2644 errors and warnings.
2646 Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */
2648 if (type
== BREAK_FETCH
) /* instruction breakpoint */
2651 sprintf (buf
, "0x0 B 0x%s 0x0", phex_nz (addr
, addr_size
));
2657 sprintf (buf
, "0x0 A 0x%s 0x%x 0x%s",
2658 phex_nz (addr
, addr_size
),
2659 type
== BREAK_READ
? 1 : (type
== BREAK_WRITE
? 2 : 3),
2660 phex_nz (addr
+ len
- 1, addr_size
));
2662 mips_send_packet (buf
, 1);
2664 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2667 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2668 &rpid
, &rcmd
, &rresponse
, &rerrflg
);
2669 if (nfields
!= 4 || rcmd
!= cmd
|| rresponse
> 255)
2670 mips_error (_("mips_common_breakpoint: "
2671 "Bad response from remote board: %s"),
2675 if (mips_check_lsi_error (addr
, rerrflg
))
2678 /* rresponse contains PMON's breakpoint number. Record the
2679 information for this breakpoint so we can clear it later. */
2680 lsi_breakpoints
[rresponse
].type
= type
;
2681 lsi_breakpoints
[rresponse
].addr
= addr
;
2682 lsi_breakpoints
[rresponse
].len
= len
;
2689 /* On non-LSI targets, the breakpoint command has this form:
2690 0x0 <CMD> <ADDR> <MASK> <FLAGS>
2691 <MASK> is a don't care mask for addresses.
2692 <FLAGS> is any combination of `r', `w', or `f' for
2693 read/write/fetch. */
2697 mask
= calculate_mask (addr
, len
);
2700 if (set
) /* set a breakpoint */
2706 case BREAK_WRITE
: /* write */
2709 case BREAK_READ
: /* read */
2712 case BREAK_ACCESS
: /* read/write */
2715 case BREAK_FETCH
: /* fetch */
2719 internal_error (__FILE__
, __LINE__
,
2720 _("failed internal consistency check"));
2724 sprintf (buf
, "0x0 B 0x%s 0x%s %s", phex_nz (addr
, addr_size
),
2725 phex_nz (mask
, addr_size
), flags
);
2730 sprintf (buf
, "0x0 b 0x%s", phex_nz (addr
, addr_size
));
2733 mips_send_packet (buf
, 1);
2735 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
2738 nfields
= sscanf (buf
, "0x%x %c 0x%x 0x%x",
2739 &rpid
, &rcmd
, &rerrflg
, &rresponse
);
2741 if (nfields
!= 4 || rcmd
!= cmd
)
2742 mips_error (_("mips_common_breakpoint: "
2743 "Bad response from remote board: %s"),
2748 /* Ddb returns "0x0 b 0x16 0x0\000", whereas
2749 Cogent returns "0x0 b 0xffffffff 0x16\000": */
2750 if (mips_monitor
== MON_DDB
)
2751 rresponse
= rerrflg
;
2752 if (rresponse
!= 22) /* invalid argument */
2753 fprintf_unfiltered (gdb_stderr
, "\
2754 mips_common_breakpoint (%s): Got error: 0x%x\n",
2755 paddress (target_gdbarch (), addr
), rresponse
);
2762 /* Send one S record as specified by SREC of length LEN, starting
2763 at ADDR. Note, however, that ADDR is not used except to provide
2764 a useful message to the user in the event that a NACK is received
2768 send_srec (char *srec
, int len
, CORE_ADDR addr
)
2774 serial_write (mips_desc
, srec
, len
);
2776 ch
= mips_readchar (remote_timeout
);
2780 case SERIAL_TIMEOUT
:
2781 error (_("Timeout during download."));
2785 case 0x15: /* NACK */
2786 fprintf_unfiltered (gdb_stderr
,
2787 "Download got a NACK at byte %s! Retrying.\n",
2788 paddress (target_gdbarch (), addr
));
2791 error (_("Download got unexpected ack char: 0x%x, retrying."),
2797 /* Download a binary file by converting it to S records. */
2800 mips_load_srec (const char *args
)
2807 unsigned int srec_frame
= 200;
2809 struct cleanup
*cleanup
;
2810 static int hashmark
= 1;
2812 buffer
= alloca (srec_frame
* 2 + 256);
2814 abfd
= gdb_bfd_open (args
, NULL
, -1);
2817 printf_filtered ("Unable to open file %s\n", args
);
2821 cleanup
= make_cleanup_bfd_unref (abfd
);
2822 if (bfd_check_format (abfd
, bfd_object
) == 0)
2824 printf_filtered ("File is not an object file\n");
2825 do_cleanups (cleanup
);
2829 /* This actually causes a download in the IDT binary format: */
2830 mips_send_command (LOAD_CMD
, 0);
2832 for (s
= abfd
->sections
; s
; s
= s
->next
)
2834 if (s
->flags
& SEC_LOAD
)
2836 unsigned int numbytes
;
2838 /* FIXME! vma too small????? */
2839 printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s
->name
,
2841 (long) (s
->vma
+ bfd_get_section_size (s
)));
2842 gdb_flush (gdb_stdout
);
2844 for (i
= 0; i
< bfd_get_section_size (s
); i
+= numbytes
)
2846 numbytes
= min (srec_frame
, bfd_get_section_size (s
) - i
);
2848 bfd_get_section_contents (abfd
, s
, buffer
, i
, numbytes
);
2850 reclen
= mips_make_srec (srec
, '3', s
->vma
+ i
,
2852 send_srec (srec
, reclen
, s
->vma
+ i
);
2854 if (deprecated_ui_load_progress_hook
)
2855 deprecated_ui_load_progress_hook (s
->name
, i
);
2859 putchar_unfiltered ('#');
2860 gdb_flush (gdb_stdout
);
2863 } /* Per-packet (or S-record) loop */
2865 putchar_unfiltered ('\n');
2866 } /* Loadable sections */
2869 putchar_unfiltered ('\n');
2871 /* Write a type 7 terminator record. no data for a type 7, and there
2872 is no data, so len is 0. */
2874 reclen
= mips_make_srec (srec
, '7', abfd
->start_address
, NULL
, 0);
2876 send_srec (srec
, reclen
, abfd
->start_address
);
2878 serial_flush_input (mips_desc
);
2879 do_cleanups (cleanup
);
2883 * mips_make_srec -- make an srecord. This writes each line, one at a
2884 * time, each with it's own header and trailer line.
2885 * An srecord looks like this:
2887 * byte count-+ address
2888 * start ---+ | | data +- checksum
2890 * S01000006F6B692D746573742E73726563E4
2891 * S315000448600000000000000000FC00005900000000E9
2892 * S31A0004000023C1400037DE00F023604000377B009020825000348D
2893 * S30B0004485A0000000000004E
2896 * S<type><length><address><data><checksum>
2900 * is the number of bytes following upto the checksum. Note that
2901 * this is not the number of chars following, since it takes two
2902 * chars to represent a byte.
2906 * 1) two byte address data record
2907 * 2) three byte address data record
2908 * 3) four byte address data record
2909 * 7) four byte address termination record
2910 * 8) three byte address termination record
2911 * 9) two byte address termination record
2914 * is the start address of the data following, or in the case of
2915 * a termination record, the start address of the image
2919 * is the sum of all the raw byte data in the record, from the length
2920 * upwards, modulo 256 and subtracted from 255.
2922 * This routine returns the length of the S-record.
2927 mips_make_srec (char *buf
, int type
, CORE_ADDR memaddr
, unsigned char *myaddr
,
2930 unsigned char checksum
;
2933 /* Create the header for the srec. addr_size is the number of bytes
2934 in the address, and 1 is the number of bytes in the count. */
2936 /* FIXME!! bigger buf required for 64-bit! */
2939 buf
[2] = len
+ 4 + 1; /* len + 4 byte address + 1 byte checksum */
2940 /* This assumes S3 style downloads (4byte addresses). There should
2941 probably be a check, or the code changed to make it more
2943 buf
[3] = memaddr
>> 24;
2944 buf
[4] = memaddr
>> 16;
2945 buf
[5] = memaddr
>> 8;
2947 memcpy (&buf
[7], myaddr
, len
);
2949 /* Note that the checksum is calculated on the raw data, not the
2950 hexified data. It includes the length, address and the data
2951 portions of the packet. */
2953 buf
+= 2; /* Point at length byte. */
2954 for (i
= 0; i
< len
+ 4 + 1; i
++)
2962 /* The following manifest controls whether we enable the simple flow
2963 control support provided by the monitor. If enabled the code will
2964 wait for an affirmative ACK between transmitting packets. */
2965 #define DOETXACK (1)
2967 /* The PMON fast-download uses an encoded packet format constructed of
2968 3byte data packets (encoded as 4 printable ASCII characters), and
2969 escape sequences (preceded by a '/'):
2972 'C' compare checksum (12bit value, not included in checksum calculation)
2973 'S' define symbol name (for addr) terminated with ","
2974 and padded to 4char boundary
2975 'Z' zero fill multiple of 3bytes
2976 'B' byte (12bit encoded value, of 8bit data)
2977 'A' address (36bit encoded value)
2978 'E' define entry as original address, and exit load
2980 The packets are processed in 4 character chunks, so the escape
2981 sequences that do not have any data (or variable length data)
2982 should be padded to a 4 character boundary. The decoder will give
2983 an error if the complete message block size is not a multiple of
2984 4bytes (size of record).
2986 The encoding of numbers is done in 6bit fields. The 6bit value is
2987 used to index into this string to get the specific character
2988 encoding for the value: */
2989 static char encoding
[] =
2990 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,.";
2992 /* Convert the number of bits required into an encoded number, 6bits
2993 at a time (range 0..63). Keep a checksum if required (passed
2994 pointer non-NULL). The function returns the number of encoded
2995 characters written into the buffer. */
2998 pmon_makeb64 (unsigned long v
, char *p
, int n
, unsigned int *chksum
)
3000 int count
= (n
/ 6);
3004 fprintf_unfiltered (gdb_stderr
,
3005 "Fast encoding bitcount must be a "
3006 "multiple of 12bits: %dbit%s\n",
3007 n
, (n
== 1) ? "" : "s");
3012 fprintf_unfiltered (gdb_stderr
,
3013 "Fast encoding cannot process more "
3014 "than 36bits at the moment: %dbits\n", n
);
3018 /* Deal with the checksum: */
3024 *chksum
+= ((v
>> 24) & 0xFFF);
3026 *chksum
+= ((v
>> 12) & 0xFFF);
3028 *chksum
+= ((v
>> 0) & 0xFFF);
3035 *p
++ = encoding
[(v
>> n
) & 0x3F];
3042 /* Shorthand function (that could be in-lined) to output the zero-fill
3043 escape sequence into the data stream. */
3046 pmon_zeroset (int recsize
, char **buff
,
3047 unsigned int *amount
, unsigned int *chksum
)
3051 sprintf (*buff
, "/Z");
3052 count
= pmon_makeb64 (*amount
, (*buff
+ 2), 12, chksum
);
3053 *buff
+= (count
+ 2);
3055 return (recsize
+ count
+ 2);
3058 /* Add the checksum specified by *VALUE to end of the record under
3059 construction. *BUF specifies the location at which to begin
3060 writing characters comprising the checksum information. RECSIZE
3061 specifies the size of the record constructed thus far. (A trailing
3062 NUL character may be present in the buffer holding the record, but
3063 the record size does not include this character.)
3065 Return the total size of the record after adding the checksum escape,
3066 the checksum itself, and the trailing newline.
3068 The checksum specified by *VALUE is zeroed out prior to returning.
3069 Additionally, *BUF is updated to refer to the location just beyond
3070 the record elements added by this call. */
3073 pmon_checkset (int recsize
, char **buff
, unsigned int *value
)
3077 /* Add the checksum (without updating the value): */
3078 sprintf (*buff
, "/C");
3079 count
= pmon_makeb64 (*value
, (*buff
+ 2), 12, NULL
);
3080 *buff
+= (count
+ 2);
3081 sprintf (*buff
, "\n");
3082 *buff
+= 2; /* Include zero terminator. */
3083 /* Forcing a checksum validation clears the sum: */
3085 return (recsize
+ count
+ 3);
3088 /* Amount of padding we leave after at the end of the output buffer,
3089 for the checksum and line termination characters: */
3090 #define CHECKSIZE (4 + 4 + 4 + 2)
3091 /* zero-fill, checksum, transfer end and line termination space. */
3093 /* The amount of binary data loaded from the object file in a single
3095 #define BINCHUNK (1024)
3097 /* Maximum line of data accepted by the monitor: */
3098 #define MAXRECSIZE (550)
3099 /* NOTE: This constant depends on the monitor being used. This value
3100 is for PMON 5.x on the Cogent Vr4300 board. */
3102 /* Create a FastLoad format record.
3104 *OUTBUF is the buffer into which a FastLoad formatted record is
3105 written. On return, the pointer position represented by *OUTBUF
3106 is updated to point at the end of the data, i.e. the next position
3107 in the buffer that may be written. No attempt is made to NUL-
3108 terminate this portion of the record written to the buffer.
3110 INBUF contains the binary input data from which the FastLoad
3111 formatted record will be built. *INPTR is an index into this
3112 buffer. *INPTR is updated as the input is consumed. Thus, on
3113 return, the caller has access to the position of the next input
3114 byte yet to be processed. INAMOUNT is the size, in bytes, of the
3117 *RECSIZE will be written with the size of the record written to the
3118 output buffer prior to returning. This size does not include a
3119 NUL-termination byte as none is written to the output buffer.
3121 *CSUM is the output buffer checksum. It is updated as data is
3122 written to the output buffer.
3124 *ZEROFILL is the current number of 3-byte zero sequences that have
3125 been encountered. It is both an input and an output to this
3129 pmon_make_fastrec (char **outbuf
, unsigned char *inbuf
, int *inptr
,
3130 int inamount
, int *recsize
, unsigned int *csum
,
3131 unsigned int *zerofill
)
3136 /* This is a simple check to ensure that our data will fit within
3137 the maximum allowable record size. Each record output is 4bytes
3138 in length. We must allow space for a pending zero fill command,
3139 the record, and a checksum record. */
3140 while ((*recsize
< (MAXRECSIZE
- CHECKSIZE
)) && ((inamount
- *inptr
) > 0))
3142 /* Process the binary data: */
3143 if ((inamount
- *inptr
) < 3)
3146 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3148 count
= pmon_makeb64 (inbuf
[*inptr
], &p
[2], 12, csum
);
3150 *recsize
+= (2 + count
);
3155 unsigned int value
= ((inbuf
[*inptr
+ 0] << 16)
3156 | (inbuf
[*inptr
+ 1] << 8)
3157 | (inbuf
[*inptr
+ 2]));
3159 /* Simple check for zero data. TODO: A better check would be
3160 to check the last, and then the middle byte for being zero
3161 (if the first byte is not). We could then check for
3162 following runs of zeros, and if above a certain size it is
3163 worth the 4 or 8 character hit of the byte insertions used
3164 to pad to the start of the zeroes. NOTE: This also depends
3165 on the alignment at the end of the zero run. */
3166 if (value
== 0x00000000)
3169 if (*zerofill
== 0xFFF) /* 12bit counter */
3170 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3175 *recsize
= pmon_zeroset (*recsize
, &p
, zerofill
, csum
);
3176 count
= pmon_makeb64 (value
, p
, 24, csum
);
3188 /* Attempt to read an ACK. If an ACK is not read in a timely manner,
3189 output the message specified by MESG. Return -1 for failure, 0
3193 pmon_check_ack (char *mesg
)
3195 #if defined(DOETXACK)
3200 c
= serial_readchar (udp_in_use
? udp_desc
: mips_desc
,
3202 if ((c
== SERIAL_TIMEOUT
) || (c
!= 0x06))
3204 fprintf_unfiltered (gdb_stderr
,
3205 "Failed to receive valid ACK for %s\n", mesg
);
3206 return (-1); /* Terminate the download. */
3209 #endif /* DOETXACK */
3213 /* pmon_download - Send a sequence of characters to the PMON download port,
3214 which is either a serial port or a UDP socket. */
3217 pmon_start_download (void)
3221 /* Create the temporary download file. */
3222 if ((tftp_file
= fopen (tftp_localname
, "w")) == NULL
)
3223 perror_with_name (tftp_localname
);
3227 mips_send_command (udp_in_use
? LOAD_CMD_UDP
: LOAD_CMD
, 0);
3228 mips_expect ("Downloading from ");
3229 mips_expect (udp_in_use
? "udp" : "tty0");
3230 mips_expect (", ^C to abort\r\n");
3234 /* Look for the string specified by STRING sent from the target board
3235 during a download operation. If the string in question is not
3236 seen, output an error message, remove the temporary file, if
3237 appropriate, and return 0. Otherwise, return 1 to indicate
3241 mips_expect_download (char *string
)
3243 if (!mips_expect (string
))
3245 fprintf_unfiltered (gdb_stderr
, "Load did not complete successfully.\n");
3247 remove (tftp_localname
); /* Remove temporary file. */
3254 /* Look for messages from the target board associated with the entry
3257 NOTE: This function doesn't indicate success or failure, so we
3258 have no way to determine whether or not the output from the board
3259 was correctly seen. However, given that other items are checked
3260 after this, it seems unlikely that those checks will pass if this
3261 check doesn't first (silently) pass. */
3264 pmon_check_entry_address (char *entry_address
, int final
)
3266 char hexnumber
[9]; /* Includes '\0' space. */
3268 mips_expect_timeout (entry_address
, tftp_in_use
? 15 : remote_timeout
);
3269 sprintf (hexnumber
, "%x", final
);
3270 mips_expect (hexnumber
);
3271 mips_expect ("\r\n");
3274 /* Look for messages from the target board showing the total number of
3275 bytes downloaded to the board. Output 1 for success if the tail
3276 end of the message was read correctly, 0 otherwise. */
3279 pmon_check_total (int bintotal
)
3281 char hexnumber
[9]; /* Includes '\0' space. */
3283 mips_expect ("\r\ntotal = 0x");
3284 sprintf (hexnumber
, "%x", bintotal
);
3285 mips_expect (hexnumber
);
3286 return mips_expect_download (" bytes\r\n");
3289 /* Look for the termination messages associated with the end of
3290 a download to the board.
3292 Also, when `tftp_in_use' is set, issue the load command to the
3293 board causing the file to be transferred. (This is done prior
3294 to looking for the above mentioned termination messages.) */
3297 pmon_end_download (int final
, int bintotal
)
3299 char hexnumber
[9]; /* Includes '\0' space. */
3303 static char *load_cmd_prefix
= "load -b -s ";
3307 /* Close off the temporary file containing the load data. */
3311 /* Make the temporary file readable by the world. */
3312 if (stat (tftp_localname
, &stbuf
) == 0)
3313 chmod (tftp_localname
, stbuf
.st_mode
| S_IROTH
);
3315 /* Must reinitialize the board to prevent PMON from crashing. */
3316 if (mips_monitor
!= MON_ROCKHOPPER
)
3317 mips_send_command ("initEther\r", -1);
3319 /* Send the load command. */
3320 cmd
= xmalloc (strlen (load_cmd_prefix
) + strlen (tftp_name
) + 2);
3321 strcpy (cmd
, load_cmd_prefix
);
3322 strcat (cmd
, tftp_name
);
3324 mips_send_command (cmd
, 0);
3326 if (!mips_expect_download ("Downloading from "))
3328 if (!mips_expect_download (tftp_name
))
3330 if (!mips_expect_download (", ^C to abort\r\n"))
3334 /* Wait for the stuff that PMON prints after the load has completed.
3335 The timeout value for use in the tftp case (15 seconds) was picked
3336 arbitrarily but might be too small for really large downloads. FIXME. */
3337 switch (mips_monitor
)
3340 pmon_check_ack ("termination");
3341 pmon_check_entry_address ("Entry address is ", final
);
3342 if (!pmon_check_total (bintotal
))
3345 case MON_ROCKHOPPER
:
3346 if (!pmon_check_total (bintotal
))
3348 pmon_check_entry_address ("Entry Address = ", final
);
3351 pmon_check_entry_address ("Entry Address = ", final
);
3352 pmon_check_ack ("termination");
3353 if (!pmon_check_total (bintotal
))
3359 remove (tftp_localname
); /* Remove temporary file. */
3362 /* Write the buffer specified by BUFFER of length LENGTH to either
3363 the board or the temporary file that'll eventually be transferred
3367 pmon_download (char *buffer
, int length
)
3373 written
= fwrite (buffer
, 1, length
, tftp_file
);
3374 if (written
< length
)
3375 perror_with_name (tftp_localname
);
3378 serial_write (udp_in_use
? udp_desc
: mips_desc
, buffer
, length
);
3381 /* Open object or executable file, FILE, and send it to the board
3382 using the FastLoad format. */
3385 pmon_load_fast (const char *file
)
3389 unsigned char *binbuf
;
3392 unsigned int csum
= 0;
3393 int hashmark
= !tftp_in_use
;
3397 struct cleanup
*cleanup
;
3399 buffer
= (char *) xmalloc (MAXRECSIZE
+ 1);
3400 binbuf
= (unsigned char *) xmalloc (BINCHUNK
);
3402 abfd
= gdb_bfd_open (file
, NULL
, -1);
3405 printf_filtered ("Unable to open file %s\n", file
);
3408 cleanup
= make_cleanup_bfd_unref (abfd
);
3410 if (bfd_check_format (abfd
, bfd_object
) == 0)
3412 printf_filtered ("File is not an object file\n");
3413 do_cleanups (cleanup
);
3417 /* Setup the required download state: */
3418 mips_send_command ("set dlproto etxack\r", -1);
3419 mips_send_command ("set dlecho off\r", -1);
3420 /* NOTE: We get a "cannot set variable" message if the variable is
3421 already defined to have the argument we give. The code doesn't
3422 care, since it just scans to the next prompt anyway. */
3423 /* Start the download: */
3424 pmon_start_download ();
3426 /* Zero the checksum. */
3427 sprintf (buffer
, "/Kxx\n");
3428 reclen
= strlen (buffer
);
3429 pmon_download (buffer
, reclen
);
3430 finished
= pmon_check_ack ("/Kxx");
3432 for (s
= abfd
->sections
; s
&& !finished
; s
= s
->next
)
3433 if (s
->flags
& SEC_LOAD
) /* Only deal with loadable sections. */
3435 bintotal
+= bfd_get_section_size (s
);
3436 final
= (s
->vma
+ bfd_get_section_size (s
));
3438 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s
->name
,
3439 (unsigned int) s
->vma
,
3440 (unsigned int) (s
->vma
+ bfd_get_section_size (s
)));
3441 gdb_flush (gdb_stdout
);
3443 /* Output the starting address. */
3444 sprintf (buffer
, "/A");
3445 reclen
= pmon_makeb64 (s
->vma
, &buffer
[2], 36, &csum
);
3446 buffer
[2 + reclen
] = '\n';
3447 buffer
[3 + reclen
] = '\0';
3448 reclen
+= 3; /* For the initial escape code and carriage return. */
3449 pmon_download (buffer
, reclen
);
3450 finished
= pmon_check_ack ("/A");
3454 unsigned int binamount
;
3455 unsigned int zerofill
= 0;
3462 i
< bfd_get_section_size (s
) && !finished
;
3467 binamount
= min (BINCHUNK
, bfd_get_section_size (s
) - i
);
3469 bfd_get_section_contents (abfd
, s
, binbuf
, i
, binamount
);
3471 /* This keeps a rolling checksum, until we decide to output
3473 for (; ((binamount
- binptr
) > 0);)
3475 pmon_make_fastrec (&bp
, binbuf
, &binptr
, binamount
,
3476 &reclen
, &csum
, &zerofill
);
3477 if (reclen
>= (MAXRECSIZE
- CHECKSIZE
))
3479 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3480 pmon_download (buffer
, reclen
);
3481 finished
= pmon_check_ack ("data record");
3484 zerofill
= 0; /* Do not transmit pending
3489 if (deprecated_ui_load_progress_hook
)
3490 deprecated_ui_load_progress_hook (s
->name
, i
);
3494 putchar_unfiltered ('#');
3495 gdb_flush (gdb_stdout
);
3499 reclen
= 0; /* buffer processed */
3504 /* Ensure no out-standing zerofill requests: */
3506 reclen
= pmon_zeroset (reclen
, &bp
, &zerofill
, &csum
);
3508 /* and then flush the line: */
3511 reclen
= pmon_checkset (reclen
, &bp
, &csum
);
3512 /* Currently pmon_checkset outputs the line terminator by
3513 default, so we write out the buffer so far: */
3514 pmon_download (buffer
, reclen
);
3515 finished
= pmon_check_ack ("record remnant");
3519 putchar_unfiltered ('\n');
3522 /* Terminate the transfer. We know that we have an empty output
3523 buffer at this point. */
3524 sprintf (buffer
, "/E/E\n"); /* Include dummy padding characters. */
3525 reclen
= strlen (buffer
);
3526 pmon_download (buffer
, reclen
);
3529 { /* Ignore the termination message: */
3530 serial_flush_input (udp_in_use
? udp_desc
: mips_desc
);
3533 { /* Deal with termination message: */
3534 pmon_end_download (final
, bintotal
);
3537 do_cleanups (cleanup
);
3541 /* mips_load -- download a file. */
3544 mips_load (struct target_ops
*self
, const char *file
, int from_tty
)
3546 struct regcache
*regcache
;
3548 /* Get the board out of remote debugging mode. */
3549 if (mips_exit_debug ())
3550 error (_("mips_load: Couldn't get into monitor mode."));
3552 if (mips_monitor
!= MON_IDT
)
3553 pmon_load_fast (file
);
3555 mips_load_srec (file
);
3559 /* Finally, make the PC point at the start address. */
3560 regcache
= get_current_regcache ();
3561 if (mips_monitor
!= MON_IDT
)
3563 /* Work around problem where PMON monitor updates the PC after a load
3564 to a different value than GDB thinks it has. The following ensures
3565 that the regcache_write_pc() WILL update the PC value: */
3566 regcache_invalidate (regcache
,
3567 mips_regnum (get_regcache_arch (regcache
))->pc
);
3570 regcache_write_pc (regcache
, bfd_get_start_address (exec_bfd
));
3573 /* Check to see if a thread is still alive. */
3576 mips_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
3578 if (ptid_equal (ptid
, remote_mips_ptid
))
3579 /* The monitor's task is always alive. */
3585 /* Convert a thread ID to a string. Returns the string in a static
3589 mips_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3591 static char buf
[64];
3593 if (ptid_equal (ptid
, remote_mips_ptid
))
3595 xsnprintf (buf
, sizeof buf
, "Thread <main>");
3599 return normal_pid_to_str (ptid
);
3602 /* Pass the command argument as a packet to PMON verbatim. */
3605 pmon_command (char *args
, int from_tty
)
3607 char buf
[DATA_MAXLEN
+ 1];
3610 sprintf (buf
, "0x0 %s", args
);
3611 mips_send_packet (buf
, 1);
3612 printf_filtered ("Send packet: %s\n", buf
);
3614 rlen
= mips_receive_packet (buf
, 1, mips_receive_wait
);
3616 printf_filtered ("Received packet: %s\n", buf
);
3619 /* -Wmissing-prototypes */
3620 extern initialize_file_ftype _initialize_remote_mips
;
3622 /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops.
3623 Create target specific commands and perform other initializations
3624 specific to this file. */
3627 _initialize_remote_mips (void)
3629 /* Initialize the fields in mips_ops that are common to all four targets. */
3630 mips_ops
.to_longname
= "Remote MIPS debugging over serial line";
3631 mips_ops
.to_close
= mips_close
;
3632 mips_ops
.to_detach
= mips_detach
;
3633 mips_ops
.to_resume
= mips_resume
;
3634 mips_ops
.to_fetch_registers
= mips_fetch_registers
;
3635 mips_ops
.to_store_registers
= mips_store_registers
;
3636 mips_ops
.to_prepare_to_store
= mips_prepare_to_store
;
3637 mips_ops
.to_xfer_partial
= mips_xfer_partial
;
3638 mips_ops
.to_files_info
= mips_files_info
;
3639 mips_ops
.to_insert_breakpoint
= mips_insert_breakpoint
;
3640 mips_ops
.to_remove_breakpoint
= mips_remove_breakpoint
;
3641 mips_ops
.to_insert_watchpoint
= mips_insert_watchpoint
;
3642 mips_ops
.to_remove_watchpoint
= mips_remove_watchpoint
;
3643 mips_ops
.to_stopped_by_watchpoint
= mips_stopped_by_watchpoint
;
3644 mips_ops
.to_can_use_hw_breakpoint
= mips_can_use_watchpoint
;
3645 mips_ops
.to_kill
= mips_kill
;
3646 mips_ops
.to_load
= mips_load
;
3647 mips_ops
.to_create_inferior
= mips_create_inferior
;
3648 mips_ops
.to_mourn_inferior
= mips_mourn_inferior
;
3649 mips_ops
.to_thread_alive
= mips_thread_alive
;
3650 mips_ops
.to_pid_to_str
= mips_pid_to_str
;
3651 mips_ops
.to_log_command
= serial_log_command
;
3652 mips_ops
.to_stratum
= process_stratum
;
3653 mips_ops
.to_has_all_memory
= default_child_has_all_memory
;
3654 mips_ops
.to_has_memory
= default_child_has_memory
;
3655 mips_ops
.to_has_stack
= default_child_has_stack
;
3656 mips_ops
.to_has_registers
= default_child_has_registers
;
3657 mips_ops
.to_has_execution
= default_child_has_execution
;
3658 mips_ops
.to_magic
= OPS_MAGIC
;
3660 /* Copy the common fields to all four target vectors. */
3661 rockhopper_ops
= pmon_ops
= ddb_ops
= lsi_ops
= mips_ops
;
3663 /* Initialize target-specific fields in the target vectors. */
3664 mips_ops
.to_shortname
= "mips";
3665 mips_ops
.to_doc
= "\
3666 Debug a board using the MIPS remote debugging protocol over a serial line.\n\
3667 The argument is the device it is connected to or, if it contains a colon,\n\
3668 HOST:PORT to access a board over a network";
3669 mips_ops
.to_open
= mips_open
;
3670 mips_ops
.to_wait
= mips_wait
;
3672 pmon_ops
.to_shortname
= "pmon";
3673 pmon_ops
.to_doc
= "\
3674 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3675 line. The argument is the device it is connected to or, if it contains a\n\
3676 colon, HOST:PORT to access a board over a network";
3677 pmon_ops
.to_open
= pmon_open
;
3678 pmon_ops
.to_wait
= mips_wait
;
3680 ddb_ops
.to_shortname
= "ddb";
3682 Debug a board using the PMON MIPS remote debugging protocol over a serial\n\
3683 line. The first argument is the device it is connected to or, if it contains\n\
3684 a colon, HOST:PORT to access a board over a network. The optional second\n\
3685 parameter is the temporary file in the form HOST:FILENAME to be used for\n\
3686 TFTP downloads to the board. The optional third parameter is the local name\n\
3687 of the TFTP temporary file, if it differs from the filename seen by the board.";
3688 ddb_ops
.to_open
= ddb_open
;
3689 ddb_ops
.to_wait
= mips_wait
;
3691 rockhopper_ops
.to_shortname
= "rockhopper";
3692 rockhopper_ops
.to_doc
= ddb_ops
.to_doc
;
3693 rockhopper_ops
.to_open
= rockhopper_open
;
3694 rockhopper_ops
.to_wait
= mips_wait
;
3696 lsi_ops
.to_shortname
= "lsi";
3697 lsi_ops
.to_doc
= pmon_ops
.to_doc
;
3698 lsi_ops
.to_open
= lsi_open
;
3699 lsi_ops
.to_wait
= mips_wait
;
3701 /* Add the targets. */
3702 add_target (&mips_ops
);
3703 add_target (&pmon_ops
);
3704 add_target (&ddb_ops
);
3705 add_target (&lsi_ops
);
3706 add_target (&rockhopper_ops
);
3708 add_setshow_zinteger_cmd ("timeout", no_class
, &mips_receive_wait
, _("\
3709 Set timeout in seconds for remote MIPS serial I/O."), _("\
3710 Show timeout in seconds for remote MIPS serial I/O."), NULL
,
3712 NULL
, /* FIXME: i18n: */
3713 &setlist
, &showlist
);
3715 add_setshow_zinteger_cmd ("retransmit-timeout", no_class
,
3716 &mips_retransmit_wait
, _("\
3717 Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3718 Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\
3719 This is the number of seconds to wait for an acknowledgement to a packet\n\
3720 before resending the packet."),
3722 NULL
, /* FIXME: i18n: */
3723 &setlist
, &showlist
);
3725 add_setshow_zinteger_cmd ("syn-garbage-limit", no_class
,
3726 &mips_syn_garbage
, _("\
3727 Set the maximum number of characters to ignore when scanning for a SYN."), _("\
3728 Show the maximum number of characters to ignore when scanning for a SYN."), _("\
3729 This is the maximum number of characters GDB will ignore when trying to\n\
3730 synchronize with the remote system. A value of -1 means that there is no\n\
3731 limit. (Note that these characters are printed out even though they are\n\
3734 NULL
, /* FIXME: i18n: */
3735 &setlist
, &showlist
);
3737 add_setshow_string_cmd ("monitor-prompt", class_obscure
,
3738 &mips_monitor_prompt
, _("\
3739 Set the prompt that GDB expects from the monitor."), _("\
3740 Show the prompt that GDB expects from the monitor."), NULL
,
3742 NULL
, /* FIXME: i18n: */
3743 &setlist
, &showlist
);
3745 add_setshow_zinteger_cmd ("monitor-warnings", class_obscure
,
3746 &monitor_warnings
, _("\
3747 Set printing of monitor warnings."), _("\
3748 Show printing of monitor warnings."), _("\
3749 When enabled, monitor warnings about hardware breakpoints will be displayed."),
3751 NULL
, /* FIXME: i18n: */
3752 &setlist
, &showlist
);
3754 add_com ("pmon", class_obscure
, pmon_command
,
3755 _("Send a packet to PMON (must be in debug mode)."));
3757 add_setshow_boolean_cmd ("mask-address", no_class
, &mask_address_p
, _("\
3758 Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3759 Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\
3760 Use \"on\" to enable the masking and \"off\" to disable it."),
3762 NULL
, /* FIXME: i18n: */
3763 &setlist
, &showlist
);
3764 remote_mips_ptid
= ptid_build (42000, 0, 42000);