Commit | Line | Data |
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c906108c | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
0a65a603 | 2 | |
32d0add0 | 3 | Copyright (C) 1993-2015 Free Software Foundation, Inc. |
0a65a603 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
6 | <ian@cygnus.com>. | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
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 | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
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. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c906108c SS |
26 | #include "bfd.h" |
27 | #include "symfile.h" | |
c906108c SS |
28 | #include "gdbcmd.h" |
29 | #include "gdbcore.h" | |
30 | #include "serial.h" | |
31 | #include "target.h" | |
53ce3c39 | 32 | #include <sys/stat.h> |
6023c606 | 33 | #include "gdb_usleep.h" |
4e052eda | 34 | #include "regcache.h" |
59d521c1 | 35 | #include <ctype.h> |
56cea623 | 36 | #include "mips-tdep.h" |
8eeafb51 | 37 | #include "gdbthread.h" |
cbb099e8 | 38 | #include "gdb_bfd.h" |
c906108c | 39 | \f |
c5aa993b | 40 | |
c906108c SS |
41 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
42 | types passed by breakpoint.c to target_insert_watchpoint. | |
43 | Value 3 is our own invention, and is used for ordinary instruction | |
44 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
45 | enum break_type |
46 | { | |
47 | BREAK_WRITE, /* 0 */ | |
48 | BREAK_READ, /* 1 */ | |
49 | BREAK_ACCESS, /* 2 */ | |
50 | BREAK_FETCH, /* 3 */ | |
51 | BREAK_UNUSED /* 4 */ | |
52 | }; | |
c906108c SS |
53 | |
54 | /* Prototypes for local functions. */ | |
55 | ||
a14ed312 | 56 | static int mips_readchar (int timeout); |
c906108c | 57 | |
a14ed312 KB |
58 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
59 | int ch, int timeout); | |
c906108c | 60 | |
a14ed312 KB |
61 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
62 | int *pch, int timeout); | |
c906108c | 63 | |
a14ed312 | 64 | static int mips_cksum (const unsigned char *hdr, |
ce6ec7d8 | 65 | const char *data, int len); |
c906108c | 66 | |
a14ed312 | 67 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 68 | |
a14ed312 | 69 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 70 | |
a14ed312 | 71 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 72 | |
4014092b AC |
73 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
74 | int *perr, int timeout, char *buff); | |
c906108c | 75 | |
a14ed312 | 76 | static void mips_initialize (void); |
c906108c | 77 | |
de90e03d | 78 | static void mips_close (struct target_ops *self); |
c906108c | 79 | |
74ed0bb4 | 80 | static int mips_map_regno (struct gdbarch *, int); |
c906108c | 81 | |
bbd2783e KB |
82 | static void mips_set_register (int regno, ULONGEST value); |
83 | ||
f32dbf8c MM |
84 | static void mips_prepare_to_store (struct target_ops *self, |
85 | struct regcache *regcache); | |
c906108c | 86 | |
8cfa2c71 | 87 | static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp); |
c906108c | 88 | |
a14ed312 | 89 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
e17a4113 | 90 | int *old_contents); |
c906108c | 91 | |
6df1b29f PA |
92 | static enum target_xfer_status mips_xfer_memory (gdb_byte *readbuf, |
93 | const gdb_byte *writebuf, | |
94 | ULONGEST memaddr, | |
95 | ULONGEST len, | |
96 | ULONGEST *xfered_len); | |
c906108c | 97 | |
a14ed312 | 98 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 99 | |
383c0389 | 100 | static void mips_mourn_inferior (struct target_ops *ops); |
c906108c | 101 | |
ce6ec7d8 | 102 | static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum); |
c906108c | 103 | |
ce6ec7d8 | 104 | static int pmon_zeroset (int recsize, char **buff, unsigned int *amount, |
a14ed312 | 105 | unsigned int *chksum); |
c906108c | 106 | |
ce6ec7d8 | 107 | static int pmon_checkset (int recsize, char **buff, unsigned int *value); |
c906108c | 108 | |
a14ed312 KB |
109 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
110 | int *inptr, int inamount, int *recsize, | |
111 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 112 | |
a14ed312 | 113 | static int pmon_check_ack (char *mesg); |
c906108c | 114 | |
a14ed312 | 115 | static void pmon_start_download (void); |
c906108c | 116 | |
a14ed312 | 117 | static void pmon_end_download (int final, int bintotal); |
c906108c | 118 | |
a14ed312 | 119 | static void pmon_download (char *buffer, int length); |
c906108c | 120 | |
9cbe5fff | 121 | static void mips_load (struct target_ops *self, const char *file, int from_tty); |
c906108c | 122 | |
a14ed312 KB |
123 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
124 | unsigned char *myaddr, int len); | |
c906108c | 125 | |
06b1d59c | 126 | static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 127 | |
06b1d59c MR |
128 | static int mips_clear_breakpoint (CORE_ADDR addr, int len, |
129 | enum break_type type); | |
c906108c | 130 | |
06b1d59c MR |
131 | static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, |
132 | enum break_type type); | |
c906108c SS |
133 | |
134 | /* Forward declarations. */ | |
135 | extern struct target_ops mips_ops; | |
136 | extern struct target_ops pmon_ops; | |
137 | extern struct target_ops ddb_ops; | |
bbd2783e | 138 | extern struct target_ops rockhopper_ops; |
c5aa993b | 139 | \f/* *INDENT-OFF* */ |
c906108c SS |
140 | /* The MIPS remote debugging interface is built on top of a simple |
141 | packet protocol. Each packet is organized as follows: | |
142 | ||
c5aa993b JM |
143 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
144 | may not appear anywhere else in the packet. Any time a SYN is | |
145 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
146 | |
147 | TYPE_LEN | |
c5aa993b JM |
148 | This byte contains the upper five bits of the logical length |
149 | of the data section, plus a single bit indicating whether this | |
150 | is a data packet or an acknowledgement. The documentation | |
151 | indicates that this bit is 1 for a data packet, but the actual | |
152 | board uses 1 for an acknowledgement. The value of the byte is | |
153 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
154 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
155 | not carry data, and must have a data length of 0. | |
c906108c SS |
156 | |
157 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
158 | the data section. The value is |
159 | 0x40 + (len & 0x3f) | |
160 | ||
161 | SEQ This byte contains the six bit sequence number of the packet. | |
162 | The value is | |
163 | 0x40 + seq | |
164 | An acknowlegment packet contains the sequence number of the | |
165 | packet being acknowledged plus 1 modulo 64. Data packets are | |
166 | transmitted in sequence. There may only be one outstanding | |
167 | unacknowledged data packet at a time. The sequence numbers | |
168 | are independent in each direction. If an acknowledgement for | |
169 | the previous packet is received (i.e., an acknowledgement with | |
170 | the sequence number of the packet just sent) the packet just | |
171 | sent should be retransmitted. If no acknowledgement is | |
172 | received within a timeout period, the packet should be | |
173 | retransmitted. This has an unfortunate failure condition on a | |
174 | high-latency line, as a delayed acknowledgement may lead to an | |
175 | endless series of duplicate packets. | |
176 | ||
177 | DATA The actual data bytes follow. The following characters are | |
178 | escaped inline with DLE (ASCII 020, or ^P): | |
179 | SYN (026) DLE S | |
180 | DLE (020) DLE D | |
181 | ^C (003) DLE C | |
182 | ^S (023) DLE s | |
183 | ^Q (021) DLE q | |
184 | The additional DLE characters are not counted in the logical | |
185 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
186 | |
187 | CSUM1 | |
188 | CSUM2 | |
189 | CSUM3 | |
c5aa993b JM |
190 | These bytes contain an 18 bit checksum of the complete |
191 | contents of the packet excluding the SEQ byte and the | |
192 | CSUM[123] bytes. The checksum is simply the twos complement | |
193 | addition of all the bytes treated as unsigned characters. The | |
194 | values of the checksum bytes are: | |
195 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
196 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
197 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
198 | |
199 | It happens that the MIPS remote debugging protocol always | |
200 | communicates with ASCII strings. Because of this, this | |
201 | implementation doesn't bother to handle the DLE quoting mechanism, | |
202 | since it will never be required. */ | |
9846de1b | 203 | /* *INDENT-ON* */ |
c906108c | 204 | |
c5aa993b | 205 | |
c906108c SS |
206 | /* The SYN character which starts each packet. */ |
207 | #define SYN '\026' | |
208 | ||
209 | /* The 0x40 used to offset each packet (this value ensures that all of | |
210 | the header and trailer bytes, other than SYN, are printable ASCII | |
211 | characters). */ | |
212 | #define HDR_OFFSET 0x40 | |
213 | ||
214 | /* The indices of the bytes in the packet header. */ | |
215 | #define HDR_INDX_SYN 0 | |
216 | #define HDR_INDX_TYPE_LEN 1 | |
217 | #define HDR_INDX_LEN1 2 | |
218 | #define HDR_INDX_SEQ 3 | |
219 | #define HDR_LENGTH 4 | |
220 | ||
221 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
222 | #define TYPE_LEN_DA_BIT 0x20 | |
223 | #define TYPE_LEN_DATA 0 | |
224 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
225 | ||
226 | /* How to compute the header bytes. */ | |
227 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
228 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
229 | (HDR_OFFSET \ | |
230 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
231 | + (((len) >> 6) & 0x1f)) | |
232 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
233 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
234 | ||
235 | /* Check that a header byte is reasonable. */ | |
236 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
237 | ||
238 | /* Get data from the header. These macros evaluate their argument | |
239 | multiple times. */ | |
240 | #define HDR_IS_DATA(hdr) \ | |
241 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
242 | #define HDR_GET_LEN(hdr) \ | |
243 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
244 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
245 | ||
246 | /* The maximum data length. */ | |
247 | #define DATA_MAXLEN 1023 | |
248 | ||
249 | /* The trailer offset. */ | |
250 | #define TRLR_OFFSET HDR_OFFSET | |
251 | ||
252 | /* The indices of the bytes in the packet trailer. */ | |
253 | #define TRLR_INDX_CSUM1 0 | |
254 | #define TRLR_INDX_CSUM2 1 | |
255 | #define TRLR_INDX_CSUM3 2 | |
256 | #define TRLR_LENGTH 3 | |
257 | ||
258 | /* How to compute the trailer bytes. */ | |
259 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
260 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
261 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
262 | ||
263 | /* Check that a trailer byte is reasonable. */ | |
264 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
265 | ||
266 | /* Get data from the trailer. This evaluates its argument multiple | |
267 | times. */ | |
268 | #define TRLR_GET_CKSUM(trlr) \ | |
269 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
270 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
271 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
272 | ||
273 | /* The sequence number modulos. */ | |
274 | #define SEQ_MODULOS (64) | |
275 | ||
276 | /* PMON commands to load from the serial port or UDP socket. */ | |
277 | #define LOAD_CMD "load -b -s tty0\r" | |
278 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
279 | ||
280 | /* The target vectors for the four different remote MIPS targets. | |
281 | These are initialized with code in _initialize_remote_mips instead | |
282 | of static initializers, to make it easier to extend the target_ops | |
283 | vector later. */ | |
bbd2783e | 284 | struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops; |
c906108c | 285 | |
c5aa993b JM |
286 | enum mips_monitor_type |
287 | { | |
288 | /* IDT/SIM monitor being used: */ | |
289 | MON_IDT, | |
290 | /* PMON monitor being used: */ | |
0df8b418 MS |
291 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] |
292 | Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
293 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] | |
294 | Risq Modular Systems, | |
295 | Thu Jun 6 09:28:40 PDT 1996 */ | |
296 | MON_LSI, /* 4.3.12 [EB,FP], | |
297 | LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
bbd2783e | 298 | MON_ROCKHOPPER, |
0df8b418 | 299 | /* Last and unused value, for sizing vectors, etc. */ |
c5aa993b JM |
300 | MON_LAST |
301 | }; | |
c906108c SS |
302 | static enum mips_monitor_type mips_monitor = MON_LAST; |
303 | ||
304 | /* The monitor prompt text. If the user sets the PMON prompt | |
305 | to some new value, the GDB `set monitor-prompt' command must also | |
306 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
307 | will not be able to connect to PMON in mips_initialize(). | |
308 | If the `set monitor-prompt' command is not used, the expected | |
309 | default prompt will be set according the target: | |
c5aa993b JM |
310 | target prompt |
311 | ----- ----- | |
312 | pmon PMON> | |
313 | ddb NEC010> | |
314 | lsi PMON> | |
315 | */ | |
c906108c SS |
316 | static char *mips_monitor_prompt; |
317 | ||
318 | /* Set to 1 if the target is open. */ | |
319 | static int mips_is_open; | |
320 | ||
0df8b418 | 321 | /* Currently active target description (if mips_is_open == 1). */ |
c906108c SS |
322 | static struct target_ops *current_ops; |
323 | ||
324 | /* Set to 1 while the connection is being initialized. */ | |
325 | static int mips_initializing; | |
326 | ||
327 | /* Set to 1 while the connection is being brought down. */ | |
328 | static int mips_exiting; | |
329 | ||
330 | /* The next sequence number to send. */ | |
331 | static unsigned int mips_send_seq; | |
332 | ||
333 | /* The next sequence number we expect to receive. */ | |
334 | static unsigned int mips_receive_seq; | |
335 | ||
336 | /* The time to wait before retransmitting a packet, in seconds. */ | |
337 | static int mips_retransmit_wait = 3; | |
338 | ||
339 | /* The number of times to try retransmitting a packet before giving up. */ | |
340 | static int mips_send_retries = 10; | |
341 | ||
342 | /* The number of garbage characters to accept when looking for an | |
343 | SYN for the next packet. */ | |
59d521c1 | 344 | static int mips_syn_garbage = 10; |
c906108c SS |
345 | |
346 | /* The time to wait for a packet, in seconds. */ | |
347 | static int mips_receive_wait = 5; | |
348 | ||
349 | /* Set if we have sent a packet to the board but have not yet received | |
350 | a reply. */ | |
351 | static int mips_need_reply = 0; | |
352 | ||
353 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 354 | static struct serial *mips_desc; |
c906108c SS |
355 | |
356 | /* UDP handle used to download files to target. */ | |
819cc324 | 357 | static struct serial *udp_desc; |
c906108c SS |
358 | static int udp_in_use; |
359 | ||
360 | /* TFTP filename used to download files to DDB board, in the form | |
361 | host:filename. */ | |
362 | static char *tftp_name; /* host:filename */ | |
363 | static char *tftp_localname; /* filename portion of above */ | |
364 | static int tftp_in_use; | |
365 | static FILE *tftp_file; | |
366 | ||
367 | /* Counts the number of times the user tried to interrupt the target (usually | |
368 | via ^C. */ | |
369 | static int interrupt_count; | |
370 | ||
0df8b418 | 371 | /* If non-zero, means that the target is running. */ |
c906108c SS |
372 | static int mips_wait_flag = 0; |
373 | ||
0df8b418 | 374 | /* If non-zero, monitor supports breakpoint commands. */ |
d4f3574e | 375 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
376 | |
377 | /* Data cache header. */ | |
378 | ||
0df8b418 | 379 | #if 0 /* not used (yet?) */ |
c906108c SS |
380 | static DCACHE *mips_dcache; |
381 | #endif | |
382 | ||
0df8b418 | 383 | /* Non-zero means that we've just hit a read or write watchpoint. */ |
c906108c SS |
384 | static int hit_watchpoint; |
385 | ||
386 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
387 | The table is indexed by a breakpoint number, which is an integer | |
0df8b418 MS |
388 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. */ |
389 | ||
c906108c SS |
390 | #define MAX_LSI_BREAKPOINTS 256 |
391 | struct lsi_breakpoint_info | |
c5aa993b JM |
392 | { |
393 | enum break_type type; /* type of breakpoint */ | |
394 | CORE_ADDR addr; /* address of breakpoint */ | |
395 | int len; /* length of region being watched */ | |
396 | unsigned long value; /* value to watch */ | |
397 | } | |
398 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
399 | |
400 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
401 | Warning values may be ORed together; error values may not. */ | |
0df8b418 MS |
402 | #define W_WARN 0x100 /* This bit is set if the error code |
403 | is a warning */ | |
404 | #define W_MSK 0x101 /* warning: Range feature is supported | |
405 | via mask */ | |
406 | #define W_VAL 0x102 /* warning: Value check is not | |
407 | supported in hardware */ | |
408 | #define W_QAL 0x104 /* warning: Requested qualifiers are | |
409 | not supported in hardware */ | |
410 | ||
411 | #define E_ERR 0x200 /* This bit is set if the error code | |
412 | is an error */ | |
c5aa993b JM |
413 | #define E_BPT 0x200 /* error: No such breakpoint number */ |
414 | #define E_RGE 0x201 /* error: Range is not supported */ | |
0df8b418 MS |
415 | #define E_QAL 0x202 /* error: The requested qualifiers can |
416 | not be used */ | |
c5aa993b JM |
417 | #define E_OUT 0x203 /* error: Out of hardware resources */ |
418 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
419 | |
420 | struct lsi_error | |
c5aa993b JM |
421 | { |
422 | int code; /* error code */ | |
423 | char *string; /* string associated with this code */ | |
424 | }; | |
c906108c SS |
425 | |
426 | struct lsi_error lsi_warning_table[] = | |
427 | { | |
c5aa993b JM |
428 | {W_MSK, "Range feature is supported via mask"}, |
429 | {W_VAL, "Value check is not supported in hardware"}, | |
430 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
431 | {0, NULL} | |
c906108c SS |
432 | }; |
433 | ||
434 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
435 | { |
436 | {E_BPT, "No such breakpoint number"}, | |
437 | {E_RGE, "Range is not supported"}, | |
438 | {E_QAL, "The requested qualifiers can not be used"}, | |
439 | {E_OUT, "Out of hardware resources"}, | |
440 | {E_NON, "Hardware breakpoint not supported"}, | |
441 | {0, NULL} | |
c906108c SS |
442 | }; |
443 | ||
444 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
445 | of warnings returned by PMON when hardware breakpoints are used. */ | |
446 | static int monitor_warnings; | |
447 | ||
8eeafb51 KB |
448 | /* This is the ptid we use while we're connected to the remote. Its |
449 | value is arbitrary, as the remote-mips target doesn't have a notion of | |
450 | processes or threads, but we need something non-null to place in | |
451 | inferior_ptid. */ | |
452 | static ptid_t remote_mips_ptid; | |
c906108c | 453 | |
477c84a7 KB |
454 | /* Close any ports which might be open. Reset certain globals indicating |
455 | the state of those ports. */ | |
456 | ||
c906108c | 457 | static void |
fba45db2 | 458 | close_ports (void) |
c906108c SS |
459 | { |
460 | mips_is_open = 0; | |
2cd58942 | 461 | serial_close (mips_desc); |
c906108c SS |
462 | |
463 | if (udp_in_use) | |
464 | { | |
2cd58942 | 465 | serial_close (udp_desc); |
c906108c SS |
466 | udp_in_use = 0; |
467 | } | |
468 | tftp_in_use = 0; | |
469 | } | |
c5aa993b | 470 | |
c906108c SS |
471 | /* Handle low-level error that we can't recover from. Note that just |
472 | error()ing out from target_wait or some such low-level place will cause | |
473 | all hell to break loose--the rest of GDB will tend to get left in an | |
474 | inconsistent state. */ | |
475 | ||
c25c4a8b | 476 | static void ATTRIBUTE_NORETURN |
c5aa993b | 477 | mips_error (char *string,...) |
c906108c SS |
478 | { |
479 | va_list args; | |
13f78033 | 480 | char *fmt; |
c5aa993b | 481 | |
c906108c | 482 | target_terminal_ours (); |
0df8b418 | 483 | wrap_here (""); /* Force out any buffered output. */ |
c906108c | 484 | gdb_flush (gdb_stdout); |
c906108c SS |
485 | gdb_flush (gdb_stderr); |
486 | ||
487 | /* Clean up in such a way that mips_close won't try to talk to the | |
488 | board (it almost surely won't work since we weren't able to talk to | |
489 | it). */ | |
490 | close_ports (); | |
491 | ||
8eeafb51 KB |
492 | if (!ptid_equal (inferior_ptid, null_ptid)) |
493 | target_mourn_inferior (); | |
c906108c | 494 | |
13f78033 AB |
495 | fmt = concat (_("Ending remote MIPS debugging: "), |
496 | string, (char *) NULL); | |
497 | make_cleanup (xfree, fmt); | |
498 | ||
499 | va_start (args, string); | |
500 | throw_verror (TARGET_CLOSE_ERROR, fmt, args); | |
501 | va_end (args); | |
c906108c SS |
502 | } |
503 | ||
504 | /* putc_readable - print a character, displaying non-printable chars in | |
505 | ^x notation or in hex. */ | |
506 | ||
507 | static void | |
fba45db2 | 508 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
509 | { |
510 | if (ch == '\n') | |
9846de1b | 511 | fputc_unfiltered ('\n', file); |
c906108c | 512 | else if (ch == '\r') |
9846de1b | 513 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 514 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 515 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 516 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 517 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 518 | else |
9846de1b | 519 | fputc_unfiltered (ch, file); |
c906108c SS |
520 | } |
521 | ||
522 | ||
523 | /* puts_readable - print a string, displaying non-printable chars in | |
524 | ^x notation or in hex. */ | |
525 | ||
526 | static void | |
98691afe | 527 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
528 | { |
529 | int c; | |
530 | ||
531 | while ((c = *string++) != '\0') | |
9846de1b | 532 | fputc_readable (c, file); |
c906108c SS |
533 | } |
534 | ||
535 | ||
bbd2783e KB |
536 | /* Read P as a hex value. Return true if every character made sense, |
537 | storing the result in *RESULT. Leave *RESULT unchanged otherwise. */ | |
538 | ||
539 | static int | |
540 | read_hex_value (const char *p, ULONGEST *result) | |
541 | { | |
542 | ULONGEST retval; | |
543 | ||
544 | retval = 0; | |
545 | while (*p != 0) | |
546 | { | |
547 | retval <<= 4; | |
548 | if (*p >= '0' && *p <= '9') | |
549 | retval |= *p - '0'; | |
550 | else if (*p >= 'A' && *p <= 'F') | |
551 | retval |= *p - 'A' + 10; | |
552 | else if (*p >= 'a' && *p <= 'f') | |
553 | retval |= *p - 'a' + 10; | |
554 | else | |
555 | return 0; | |
556 | p++; | |
557 | } | |
558 | *result = retval; | |
559 | return 1; | |
560 | } | |
561 | ||
562 | ||
c906108c | 563 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
0df8b418 | 564 | timed out. TIMEOUT specifies timeout value in seconds. */ |
c906108c | 565 | |
a78f21af | 566 | static int |
98691afe | 567 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 568 | { |
98691afe | 569 | const char *p = string; |
c906108c SS |
570 | |
571 | if (remote_debug) | |
572 | { | |
9846de1b JM |
573 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
574 | fputs_readable (string, gdb_stdlog); | |
575 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
576 | } |
577 | ||
8edbea78 | 578 | immediate_quit++; |
522002f9 | 579 | QUIT; |
c906108c SS |
580 | while (1) |
581 | { | |
582 | int c; | |
583 | ||
2cd58942 | 584 | /* Must use serial_readchar() here cuz mips_readchar would get |
0df8b418 | 585 | confused if we were waiting for the mips_monitor_prompt... */ |
c906108c | 586 | |
2cd58942 | 587 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
588 | |
589 | if (c == SERIAL_TIMEOUT) | |
590 | { | |
591 | if (remote_debug) | |
9846de1b | 592 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
593 | return 0; |
594 | } | |
595 | ||
596 | if (remote_debug) | |
9846de1b | 597 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
598 | |
599 | if (c == *p++) | |
c5aa993b | 600 | { |
c906108c SS |
601 | if (*p == '\0') |
602 | { | |
8edbea78 | 603 | immediate_quit--; |
c906108c | 604 | if (remote_debug) |
9846de1b | 605 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
606 | return 1; |
607 | } | |
608 | } | |
609 | else | |
610 | { | |
611 | p = string; | |
612 | if (c == *p) | |
613 | p++; | |
614 | } | |
615 | } | |
616 | } | |
617 | ||
618 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
619 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
0df8b418 | 620 | mips_expect_timeout if a different timeout value is needed. */ |
c906108c | 621 | |
a78f21af | 622 | static int |
98691afe | 623 | mips_expect (const char *string) |
c906108c | 624 | { |
688991e6 | 625 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
626 | } |
627 | ||
c906108c | 628 | /* Read a character from the remote, aborting on error. Returns |
2cd58942 AC |
629 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
630 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
631 | board, then we are debugging on the main console port, and we have | |
632 | somehow dropped out of remote debugging mode. In this case, we | |
633 | automatically go back in to remote debugging mode. This is a hack, | |
634 | put in because I can't find any way for a program running on the | |
635 | remote board to terminate without also ending remote debugging | |
c906108c SS |
636 | mode. I assume users won't have any trouble with this; for one |
637 | thing, the IDT documentation generally assumes that the remote | |
638 | debugging port is not the console port. This is, however, very | |
639 | convenient for DejaGnu when you only have one connected serial | |
640 | port. */ | |
641 | ||
642 | static int | |
fba45db2 | 643 | mips_readchar (int timeout) |
c906108c SS |
644 | { |
645 | int ch; | |
646 | static int state = 0; | |
647 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
648 | ||
0df8b418 | 649 | { /* FIXME this whole block is dead code! */ |
c906108c SS |
650 | int i; |
651 | ||
652 | i = timeout; | |
653 | if (i == -1 && watchdog > 0) | |
c5aa993b | 654 | i = watchdog; |
c906108c | 655 | } |
c906108c SS |
656 | |
657 | if (state == mips_monitor_prompt_len) | |
658 | timeout = 1; | |
2cd58942 | 659 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 660 | |
0df8b418 | 661 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */ |
c906108c SS |
662 | { |
663 | target_mourn_inferior (); | |
b37520b6 | 664 | error (_("Watchdog has expired. Target detached.")); |
c906108c | 665 | } |
7a292a7a | 666 | |
c906108c | 667 | if (ch == SERIAL_EOF) |
cdefc55d | 668 | mips_error (_("End of file from remote")); |
c906108c | 669 | if (ch == SERIAL_ERROR) |
cdefc55d | 670 | mips_error (_("Error reading from remote: %s"), safe_strerror (errno)); |
c906108c SS |
671 | if (remote_debug > 1) |
672 | { | |
673 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 674 | target_wait, and I think this might be called from there. */ |
c906108c | 675 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 676 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 677 | else |
9846de1b | 678 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
679 | } |
680 | ||
681 | /* If we have seen mips_monitor_prompt and we either time out, or | |
682 | we see a @ (which was echoed from a packet we sent), reset the | |
683 | board as described above. The first character in a packet after | |
684 | the SYN (which is not echoed) is always an @ unless the packet is | |
685 | more than 64 characters long, which ours never are. */ | |
686 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
687 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
688 | && !mips_initializing |
689 | && !mips_exiting) | |
c906108c SS |
690 | { |
691 | if (remote_debug > 0) | |
692 | /* Don't use _filtered; we can't deal with a QUIT out of | |
693 | target_wait, and I think this might be called from there. */ | |
0df8b418 MS |
694 | fprintf_unfiltered (gdb_stdlog, |
695 | "Reinitializing MIPS debugging mode\n"); | |
c906108c SS |
696 | |
697 | mips_need_reply = 0; | |
698 | mips_initialize (); | |
699 | ||
700 | state = 0; | |
701 | ||
702 | /* At this point, about the only thing we can do is abort the command | |
0df8b418 | 703 | in progress and get back to command level as quickly as possible. */ |
c906108c | 704 | |
9b20d036 | 705 | error (_("Remote board reset, debug protocol re-initialized.")); |
c906108c SS |
706 | } |
707 | ||
708 | if (ch == mips_monitor_prompt[state]) | |
709 | ++state; | |
710 | else | |
711 | state = 0; | |
712 | ||
713 | return ch; | |
714 | } | |
715 | ||
716 | /* Get a packet header, putting the data in the supplied buffer. | |
717 | PGARBAGE is a pointer to the number of garbage characters received | |
718 | so far. CH is the last character received. Returns 0 for success, | |
719 | or -1 for timeout. */ | |
720 | ||
721 | static int | |
fba45db2 | 722 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
723 | { |
724 | int i; | |
725 | ||
726 | while (1) | |
727 | { | |
728 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
729 | sitting here indefinitely if the board sends us one garbage |
730 | character per second. ch may already have a value from the | |
731 | last time through the loop. */ | |
c906108c SS |
732 | while (ch != SYN) |
733 | { | |
734 | ch = mips_readchar (timeout); | |
735 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 736 | return -1; |
c906108c SS |
737 | if (ch != SYN) |
738 | { | |
739 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 740 | what the program is outputting, if the debugging is |
59d521c1 AC |
741 | being done on the console port. Don't use _filtered: |
742 | we can't deal with a QUIT out of target_wait and | |
0df8b418 | 743 | buffered target output confuses the user. */ |
59d521c1 AC |
744 | if (!mips_initializing || remote_debug > 0) |
745 | { | |
746 | if (isprint (ch) || isspace (ch)) | |
747 | { | |
748 | fputc_unfiltered (ch, gdb_stdtarg); | |
749 | } | |
750 | else | |
751 | { | |
752 | fputc_readable (ch, gdb_stdtarg); | |
753 | } | |
754 | gdb_flush (gdb_stdtarg); | |
755 | } | |
756 | ||
0df8b418 | 757 | /* Only count unprintable characters. */ |
59d521c1 AC |
758 | if (! (isprint (ch) || isspace (ch))) |
759 | (*pgarbage) += 1; | |
760 | ||
c906108c SS |
761 | if (mips_syn_garbage > 0 |
762 | && *pgarbage > mips_syn_garbage) | |
cdefc55d KB |
763 | mips_error (_("Debug protocol failure: more " |
764 | "than %d characters before a sync."), | |
c906108c SS |
765 | mips_syn_garbage); |
766 | } | |
767 | } | |
768 | ||
769 | /* Get the packet header following the SYN. */ | |
770 | for (i = 1; i < HDR_LENGTH; i++) | |
771 | { | |
772 | ch = mips_readchar (timeout); | |
773 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 774 | return -1; |
c906108c | 775 | /* Make sure this is a header byte. */ |
c5aa993b | 776 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
777 | break; |
778 | ||
779 | hdr[i] = ch; | |
780 | } | |
781 | ||
782 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 783 | loop around and keep looking for SYN. */ |
c906108c | 784 | if (i >= HDR_LENGTH) |
c5aa993b | 785 | return 0; |
c906108c SS |
786 | } |
787 | } | |
788 | ||
789 | /* Get a packet header, putting the data in the supplied buffer. | |
790 | PGARBAGE is a pointer to the number of garbage characters received | |
791 | so far. The last character read is returned in *PCH. Returns 0 | |
792 | for success, -1 for timeout, -2 for error. */ | |
793 | ||
794 | static int | |
0df8b418 MS |
795 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
796 | int *pch, int timeout) | |
c906108c SS |
797 | { |
798 | int i; | |
799 | int ch; | |
800 | ||
801 | for (i = 0; i < TRLR_LENGTH; i++) | |
802 | { | |
803 | ch = mips_readchar (timeout); | |
804 | *pch = ch; | |
805 | if (ch == SERIAL_TIMEOUT) | |
806 | return -1; | |
c5aa993b | 807 | if (!TRLR_CHECK (ch)) |
c906108c SS |
808 | return -2; |
809 | trlr[i] = ch; | |
810 | } | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* Get the checksum of a packet. HDR points to the packet header. | |
ce6ec7d8 | 815 | DATASTR points to the packet data. LEN is the length of DATASTR. */ |
c906108c SS |
816 | |
817 | static int | |
ce6ec7d8 | 818 | mips_cksum (const unsigned char *hdr, const char *datastr, int len) |
c906108c | 819 | { |
52f0bd74 | 820 | const unsigned char *p; |
ce6ec7d8 | 821 | const unsigned char *data = (const unsigned char *) datastr; |
52f0bd74 AC |
822 | int c; |
823 | int cksum; | |
c906108c SS |
824 | |
825 | cksum = 0; | |
826 | ||
827 | /* The initial SYN is not included in the checksum. */ | |
828 | c = HDR_LENGTH - 1; | |
829 | p = hdr + 1; | |
830 | while (c-- != 0) | |
831 | cksum += *p++; | |
c5aa993b | 832 | |
c906108c SS |
833 | c = len; |
834 | p = data; | |
835 | while (c-- != 0) | |
836 | cksum += *p++; | |
837 | ||
838 | return cksum; | |
839 | } | |
840 | ||
841 | /* Send a packet containing the given ASCII string. */ | |
842 | ||
843 | static void | |
fba45db2 | 844 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
845 | { |
846 | /* unsigned */ int len; | |
847 | unsigned char *packet; | |
52f0bd74 | 848 | int cksum; |
fe978cb0 | 849 | int attempt; |
c906108c SS |
850 | |
851 | len = strlen (s); | |
852 | if (len > DATA_MAXLEN) | |
cdefc55d | 853 | mips_error (_("MIPS protocol data packet too long: %s"), s); |
c906108c SS |
854 | |
855 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
856 | ||
857 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
858 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
859 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
860 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
861 | ||
862 | memcpy (packet + HDR_LENGTH, s, len); | |
863 | ||
ce6ec7d8 | 864 | cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len); |
c906108c SS |
865 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); |
866 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
867 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
868 | ||
869 | /* Increment the sequence number. This will set mips_send_seq to | |
870 | the sequence number we expect in the acknowledgement. */ | |
871 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
872 | ||
873 | /* We can only have one outstanding data packet, so we just wait for | |
874 | the acknowledgement here. Keep retransmitting the packet until | |
875 | we get one, or until we've tried too many times. */ | |
fe978cb0 | 876 | for (attempt = 0; attempt < mips_send_retries; attempt++) |
c906108c SS |
877 | { |
878 | int garbage; | |
879 | int ch; | |
880 | ||
881 | if (remote_debug > 0) | |
882 | { | |
883 | /* Don't use _filtered; we can't deal with a QUIT out of | |
884 | target_wait, and I think this might be called from there. */ | |
885 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 886 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
887 | } |
888 | ||
2cd58942 | 889 | if (serial_write (mips_desc, packet, |
c906108c | 890 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
cdefc55d | 891 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
c906108c | 892 | |
c5aa993b | 893 | if (!get_ack) |
c906108c SS |
894 | return; |
895 | ||
896 | garbage = 0; | |
897 | ch = 0; | |
898 | while (1) | |
899 | { | |
900 | unsigned char hdr[HDR_LENGTH + 1]; | |
901 | unsigned char trlr[TRLR_LENGTH + 1]; | |
902 | int err; | |
903 | unsigned int seq; | |
904 | ||
905 | /* Get the packet header. If we time out, resend the data | |
906 | packet. */ | |
907 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
908 | if (err != 0) | |
909 | break; | |
910 | ||
911 | ch = 0; | |
912 | ||
913 | /* If we get a data packet, assume it is a duplicate and | |
914 | ignore it. FIXME: If the acknowledgement is lost, this | |
915 | data packet may be the packet the remote sends after the | |
916 | acknowledgement. */ | |
c5aa993b JM |
917 | if (HDR_IS_DATA (hdr)) |
918 | { | |
919 | int i; | |
920 | ||
921 | /* Ignore any errors raised whilst attempting to ignore | |
0df8b418 | 922 | packet. */ |
c5aa993b JM |
923 | |
924 | len = HDR_GET_LEN (hdr); | |
925 | ||
926 | for (i = 0; i < len; i++) | |
927 | { | |
928 | int rch; | |
929 | ||
688991e6 | 930 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
931 | if (rch == SYN) |
932 | { | |
933 | ch = SYN; | |
934 | break; | |
935 | } | |
936 | if (rch == SERIAL_TIMEOUT) | |
937 | break; | |
0df8b418 | 938 | /* Ignore the character. */ |
c5aa993b JM |
939 | } |
940 | ||
941 | if (i == len) | |
688991e6 AC |
942 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
943 | remote_timeout); | |
c5aa993b JM |
944 | |
945 | /* We don't bother checking the checksum, or providing an | |
0df8b418 | 946 | ACK to the packet. */ |
c5aa993b JM |
947 | continue; |
948 | } | |
c906108c SS |
949 | |
950 | /* If the length is not 0, this is a garbled packet. */ | |
951 | if (HDR_GET_LEN (hdr) != 0) | |
952 | continue; | |
953 | ||
954 | /* Get the packet trailer. */ | |
955 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
956 | mips_retransmit_wait); | |
957 | ||
958 | /* If we timed out, resend the data packet. */ | |
959 | if (err == -1) | |
960 | break; | |
961 | ||
962 | /* If we got a bad character, reread the header. */ | |
963 | if (err != 0) | |
964 | continue; | |
965 | ||
966 | /* If the checksum does not match the trailer checksum, this | |
967 | is a bad packet; ignore it. */ | |
ce6ec7d8 | 968 | if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr)) |
c906108c SS |
969 | continue; |
970 | ||
971 | if (remote_debug > 0) | |
972 | { | |
973 | hdr[HDR_LENGTH] = '\0'; | |
974 | trlr[TRLR_LENGTH] = '\0'; | |
975 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 976 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
977 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
978 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
979 | } |
980 | ||
981 | /* If this ack is for the current packet, we're done. */ | |
982 | seq = HDR_GET_SEQ (hdr); | |
983 | if (seq == mips_send_seq) | |
984 | return; | |
985 | ||
986 | /* If this ack is for the last packet, resend the current | |
987 | packet. */ | |
988 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
989 | break; | |
990 | ||
991 | /* Otherwise this is a bad ack; ignore it. Increment the | |
992 | garbage count to ensure that we do not stay in this loop | |
993 | forever. */ | |
994 | ++garbage; | |
995 | } | |
996 | } | |
997 | ||
cdefc55d | 998 | mips_error (_("Remote did not acknowledge packet")); |
c906108c SS |
999 | } |
1000 | ||
1001 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
1002 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
1003 | implies that only the sender retransmits packets, so this code just | |
1004 | waits silently for a packet. It returns the length of the received | |
1005 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
1006 | don't print an error message and return -1. */ | |
1007 | ||
1008 | static int | |
fba45db2 | 1009 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
1010 | { |
1011 | int ch; | |
1012 | int garbage; | |
1013 | int len; | |
1014 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
1015 | int cksum; | |
1016 | ||
1017 | ch = 0; | |
1018 | garbage = 0; | |
1019 | while (1) | |
1020 | { | |
1021 | unsigned char hdr[HDR_LENGTH]; | |
1022 | unsigned char trlr[TRLR_LENGTH]; | |
1023 | int i; | |
1024 | int err; | |
1025 | ||
1026 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
1027 | { | |
1028 | if (throw_error) | |
cdefc55d | 1029 | mips_error (_("Timed out waiting for remote packet")); |
c906108c SS |
1030 | else |
1031 | return -1; | |
1032 | } | |
1033 | ||
1034 | ch = 0; | |
1035 | ||
1036 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1037 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1038 | { |
c5aa993b JM |
1039 | len = HDR_GET_LEN (hdr); |
1040 | /* Check if the length is valid for an ACK, we may aswell | |
1041 | try and read the remainder of the packet: */ | |
1042 | if (len == 0) | |
1043 | { | |
1044 | /* Ignore the error condition, since we are going to | |
0df8b418 | 1045 | ignore the packet anyway. */ |
c5aa993b JM |
1046 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); |
1047 | } | |
c906108c SS |
1048 | /* Don't use _filtered; we can't deal with a QUIT out of |
1049 | target_wait, and I think this might be called from there. */ | |
1050 | if (remote_debug > 0) | |
9846de1b | 1051 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1052 | continue; |
1053 | } | |
1054 | ||
1055 | len = HDR_GET_LEN (hdr); | |
1056 | for (i = 0; i < len; i++) | |
1057 | { | |
1058 | int rch; | |
1059 | ||
1060 | rch = mips_readchar (timeout); | |
1061 | if (rch == SYN) | |
1062 | { | |
1063 | ch = SYN; | |
1064 | break; | |
1065 | } | |
1066 | if (rch == SERIAL_TIMEOUT) | |
1067 | { | |
1068 | if (throw_error) | |
cdefc55d | 1069 | mips_error (_("Timed out waiting for remote packet")); |
c906108c SS |
1070 | else |
1071 | return -1; | |
1072 | } | |
1073 | buff[i] = rch; | |
1074 | } | |
1075 | ||
1076 | if (i < len) | |
1077 | { | |
1078 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1079 | target_wait, and I think this might be called from there. */ | |
1080 | if (remote_debug > 0) | |
9846de1b JM |
1081 | fprintf_unfiltered (gdb_stdlog, |
1082 | "Got new SYN after %d chars (wanted %d)\n", | |
1083 | i, len); | |
c906108c SS |
1084 | continue; |
1085 | } | |
1086 | ||
1087 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1088 | if (err == -1) | |
1089 | { | |
1090 | if (throw_error) | |
cdefc55d | 1091 | mips_error (_("Timed out waiting for packet")); |
c906108c SS |
1092 | else |
1093 | return -1; | |
1094 | } | |
1095 | if (err == -2) | |
1096 | { | |
1097 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1098 | target_wait, and I think this might be called from there. */ | |
1099 | if (remote_debug > 0) | |
9846de1b | 1100 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1101 | continue; |
1102 | } | |
1103 | ||
1104 | /* If this is the wrong sequence number, ignore it. */ | |
1105 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1106 | { | |
1107 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1108 | target_wait, and I think this might be called from there. */ | |
1109 | if (remote_debug > 0) | |
9846de1b | 1110 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1111 | "Ignoring sequence number %d (want %d)\n", |
1112 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1113 | continue; |
1114 | } | |
1115 | ||
1116 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1117 | break; |
c906108c SS |
1118 | |
1119 | if (remote_debug > 0) | |
1120 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1121 | target_wait, and I think this might be called from there. */ | |
1122 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1123 | mips_cksum (hdr, buff, len), |
1124 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1125 | |
1126 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1127 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1128 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1129 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1130 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1131 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1132 | ||
ce6ec7d8 | 1133 | cksum = mips_cksum (ack, NULL, 0); |
c906108c SS |
1134 | |
1135 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1136 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1137 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1138 | ||
1139 | if (remote_debug > 0) | |
1140 | { | |
1141 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1142 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1143 | target_wait, and I think this might be called from there. */ | |
1144 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1145 | ack + 1); |
c906108c SS |
1146 | } |
1147 | ||
2cd58942 | 1148 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1149 | { |
1150 | if (throw_error) | |
cdefc55d KB |
1151 | mips_error (_("write to target failed: %s"), |
1152 | safe_strerror (errno)); | |
c906108c SS |
1153 | else |
1154 | return -1; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | if (remote_debug > 0) | |
1159 | { | |
1160 | buff[len] = '\0'; | |
1161 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1162 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1163 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1164 | } | |
1165 | ||
1166 | /* We got the packet. Send an acknowledgement. */ | |
1167 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1168 | ||
1169 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1170 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1171 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1172 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1173 | ||
ce6ec7d8 | 1174 | cksum = mips_cksum (ack, NULL, 0); |
c906108c SS |
1175 | |
1176 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1177 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1178 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1179 | ||
1180 | if (remote_debug > 0) | |
1181 | { | |
1182 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1183 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1184 | target_wait, and I think this might be called from there. */ |
c906108c | 1185 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1186 | ack + 1); |
c906108c SS |
1187 | } |
1188 | ||
2cd58942 | 1189 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1190 | { |
1191 | if (throw_error) | |
cdefc55d | 1192 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
c906108c SS |
1193 | else |
1194 | return -1; | |
1195 | } | |
1196 | ||
1197 | return len; | |
1198 | } | |
1199 | \f | |
1200 | /* Optionally send a request to the remote system and optionally wait | |
1201 | for the reply. This implements the remote debugging protocol, | |
1202 | which is built on top of the packet protocol defined above. Each | |
1203 | request has an ADDR argument and a DATA argument. The following | |
1204 | requests are defined: | |
1205 | ||
c5aa993b JM |
1206 | \0 don't send a request; just wait for a reply |
1207 | i read word from instruction space at ADDR | |
1208 | d read word from data space at ADDR | |
1209 | I write DATA to instruction space at ADDR | |
1210 | D write DATA to data space at ADDR | |
1211 | r read register number ADDR | |
1212 | R set register number ADDR to value DATA | |
1213 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1214 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1215 | |
1216 | The read requests return the value requested. The write requests | |
1217 | return the previous value in the changed location. The execution | |
1218 | requests return a UNIX wait value (the approximate signal which | |
1219 | caused execution to stop is in the upper eight bits). | |
1220 | ||
1221 | If PERR is not NULL, this function waits for a reply. If an error | |
1222 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1223 | target board reports. */ | |
1224 | ||
4014092b AC |
1225 | static ULONGEST |
1226 | mips_request (int cmd, | |
1227 | ULONGEST addr, | |
1228 | ULONGEST data, | |
1229 | int *perr, | |
1230 | int timeout, | |
1231 | char *buff) | |
c906108c | 1232 | { |
f5656ead | 1233 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
c906108c | 1234 | char myBuff[DATA_MAXLEN + 1]; |
bbd2783e | 1235 | char response_string[17]; |
c906108c SS |
1236 | int len; |
1237 | int rpid; | |
1238 | char rcmd; | |
1239 | int rerrflg; | |
bbd2783e | 1240 | ULONGEST rresponse; |
c906108c SS |
1241 | |
1242 | if (buff == (char *) NULL) | |
1243 | buff = myBuff; | |
1244 | ||
1245 | if (cmd != '\0') | |
1246 | { | |
1247 | if (mips_need_reply) | |
8e65ff28 | 1248 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
1249 | _("mips_request: Trying to send " |
1250 | "command before reply")); | |
bbd2783e KB |
1251 | /* 'T' sets a register to a 64-bit value, so make sure we use |
1252 | the right conversion function. */ | |
1253 | if (cmd == 'T') | |
1254 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, | |
1255 | phex_nz (addr, addr_size), phex_nz (data, 8)); | |
1256 | else | |
1257 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, | |
1258 | phex_nz (addr, addr_size), phex_nz (data, addr_size)); | |
1259 | ||
c906108c SS |
1260 | mips_send_packet (buff, 1); |
1261 | mips_need_reply = 1; | |
1262 | } | |
1263 | ||
1264 | if (perr == (int *) NULL) | |
1265 | return 0; | |
1266 | ||
c5aa993b | 1267 | if (!mips_need_reply) |
8e65ff28 | 1268 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1269 | _("mips_request: Trying to get reply before command")); |
c906108c SS |
1270 | |
1271 | mips_need_reply = 0; | |
1272 | ||
1273 | len = mips_receive_packet (buff, 1, timeout); | |
1274 | buff[len] = '\0'; | |
1275 | ||
bbd2783e KB |
1276 | if (sscanf (buff, "0x%x %c 0x%x 0x%16s", |
1277 | &rpid, &rcmd, &rerrflg, response_string) != 4 | |
1278 | || !read_hex_value (response_string, &rresponse) | |
c906108c | 1279 | || (cmd != '\0' && rcmd != cmd)) |
cdefc55d | 1280 | mips_error (_("Bad response from remote board")); |
c906108c SS |
1281 | |
1282 | if (rerrflg != 0) | |
1283 | { | |
1284 | *perr = 1; | |
1285 | ||
1286 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1287 | not be the same as errno values used on other systems. If |
1288 | they stick to common errno values, they will be the same, but | |
1289 | if they don't, they must be translated. */ | |
c906108c SS |
1290 | errno = rresponse; |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | *perr = 0; | |
1296 | return rresponse; | |
1297 | } | |
1298 | ||
477c84a7 KB |
1299 | /* Cleanup associated with mips_initialize(). */ |
1300 | ||
c906108c | 1301 | static void |
4efb68b1 | 1302 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1303 | { |
1304 | mips_initializing = 0; | |
1305 | } | |
1306 | ||
477c84a7 KB |
1307 | /* Cleanup associated with mips_exit_debug(). */ |
1308 | ||
c906108c | 1309 | static void |
4efb68b1 | 1310 | mips_exit_cleanups (void *arg) |
c906108c SS |
1311 | { |
1312 | mips_exiting = 0; | |
1313 | } | |
1314 | ||
477c84a7 KB |
1315 | /* Send a command and wait for that command to be echoed back. Wait, |
1316 | too, for the following prompt. */ | |
1317 | ||
c906108c | 1318 | static void |
fba45db2 | 1319 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1320 | { |
2cd58942 | 1321 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1322 | mips_expect (cmd); |
1323 | mips_expect ("\n"); | |
1324 | if (prompt) | |
1325 | mips_expect (mips_monitor_prompt); | |
1326 | } | |
1327 | ||
1328 | /* Enter remote (dbx) debug mode: */ | |
477c84a7 | 1329 | |
c906108c | 1330 | static void |
fba45db2 | 1331 | mips_enter_debug (void) |
c906108c SS |
1332 | { |
1333 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1334 | mips_send_seq = 0; | |
1335 | mips_receive_seq = 0; | |
1336 | ||
1337 | if (mips_monitor != MON_IDT) | |
1338 | mips_send_command ("debug\r", 0); | |
0df8b418 | 1339 | else /* Assume IDT monitor by default. */ |
c906108c SS |
1340 | mips_send_command ("db tty0\r", 0); |
1341 | ||
6023c606 | 1342 | gdb_usleep (1000000); |
2cd58942 | 1343 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1344 | |
1345 | /* We don't need to absorb any spurious characters here, since the | |
1346 | mips_receive_header will eat up a reasonable number of characters | |
1347 | whilst looking for the SYN, however this avoids the "garbage" | |
0df8b418 | 1348 | being displayed to the user. */ |
c906108c SS |
1349 | if (mips_monitor != MON_IDT) |
1350 | mips_expect ("\r"); | |
c5aa993b | 1351 | |
c906108c SS |
1352 | { |
1353 | char buff[DATA_MAXLEN + 1]; | |
123f5f96 | 1354 | |
c906108c | 1355 | if (mips_receive_packet (buff, 1, 3) < 0) |
cdefc55d | 1356 | mips_error (_("Failed to initialize (didn't receive packet).")); |
c906108c SS |
1357 | } |
1358 | } | |
1359 | ||
1360 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
477c84a7 | 1361 | |
c906108c | 1362 | static int |
fba45db2 | 1363 | mips_exit_debug (void) |
c906108c SS |
1364 | { |
1365 | int err; | |
1366 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1367 | ||
1368 | mips_exiting = 1; | |
1369 | ||
bbd2783e | 1370 | if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER) |
c906108c SS |
1371 | { |
1372 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1373 | so we do not get a reply to this command: */ | |
4014092b | 1374 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1375 | mips_need_reply = 0; |
1376 | if (!mips_expect (" break!")) | |
d6a2e54a TT |
1377 | { |
1378 | do_cleanups (old_cleanups); | |
1379 | return -1; | |
1380 | } | |
c906108c SS |
1381 | } |
1382 | else | |
4014092b | 1383 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1384 | |
1385 | if (!mips_expect (mips_monitor_prompt)) | |
d6a2e54a TT |
1386 | { |
1387 | do_cleanups (old_cleanups); | |
1388 | return -1; | |
1389 | } | |
c906108c SS |
1390 | |
1391 | do_cleanups (old_cleanups); | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1397 | really connected. */ | |
1398 | ||
1399 | static void | |
fba45db2 | 1400 | mips_initialize (void) |
c906108c SS |
1401 | { |
1402 | int err; | |
d6a2e54a | 1403 | struct cleanup *old_cleanups; |
c906108c SS |
1404 | int j; |
1405 | ||
1406 | /* What is this code doing here? I don't see any way it can happen, and | |
1407 | it might mean mips_initializing didn't get cleared properly. | |
1408 | So I'll make it a warning. */ | |
1409 | ||
1410 | if (mips_initializing) | |
1411 | { | |
cdefc55d | 1412 | warning (_("internal error: mips_initialize called twice")); |
c906108c SS |
1413 | return; |
1414 | } | |
1415 | ||
d6a2e54a TT |
1416 | old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
1417 | ||
c906108c SS |
1418 | mips_wait_flag = 0; |
1419 | mips_initializing = 1; | |
1420 | ||
1421 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1422 | into the monitor, and restarting the protocol. */ | |
1423 | ||
1424 | /* Force the system into the monitor. After this we *should* be at | |
1425 | the mips_monitor_prompt. */ | |
1426 | if (mips_monitor != MON_IDT) | |
0df8b418 MS |
1427 | j = 0; /* Start by checking if we are already |
1428 | at the prompt. */ | |
c906108c | 1429 | else |
0df8b418 | 1430 | j = 1; /* Start by sending a break. */ |
c906108c SS |
1431 | for (; j <= 4; j++) |
1432 | { | |
1433 | switch (j) | |
1434 | { | |
0df8b418 | 1435 | case 0: /* First, try sending a CR. */ |
2cd58942 AC |
1436 | serial_flush_input (mips_desc); |
1437 | serial_write (mips_desc, "\r", 1); | |
c5aa993b | 1438 | break; |
0df8b418 | 1439 | case 1: /* First, try sending a break. */ |
2cd58942 | 1440 | serial_send_break (mips_desc); |
c906108c | 1441 | break; |
0df8b418 | 1442 | case 2: /* Then, try a ^C. */ |
2cd58942 | 1443 | serial_write (mips_desc, "\003", 1); |
c906108c | 1444 | break; |
0df8b418 | 1445 | case 3: /* Then, try escaping from download. */ |
c906108c | 1446 | { |
c5aa993b JM |
1447 | if (mips_monitor != MON_IDT) |
1448 | { | |
1449 | char tbuff[7]; | |
1450 | ||
1451 | /* We shouldn't need to send multiple termination | |
1452 | sequences, since the target performs line (or | |
1453 | block) reads, and then processes those | |
0df8b418 | 1454 | packets. In-case we were downloading a large packet |
c5aa993b | 1455 | we flush the output buffer before inserting a |
0df8b418 | 1456 | termination sequence. */ |
2cd58942 | 1457 | serial_flush_output (mips_desc); |
c5aa993b | 1458 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1459 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1460 | } |
1461 | else | |
1462 | { | |
1463 | char srec[10]; | |
1464 | int i; | |
1465 | ||
1466 | /* We are possibly in binary download mode, having | |
1467 | aborted in the middle of an S-record. ^C won't | |
1468 | work because of binary mode. The only reliable way | |
1469 | out is to send enough termination packets (8 bytes) | |
1470 | to fill up and then overflow the largest size | |
1471 | S-record (255 bytes in this case). This amounts to | |
0df8b418 | 1472 | 256/8 + 1 packets. */ |
c5aa993b JM |
1473 | |
1474 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1475 | ||
1476 | for (i = 1; i <= 33; i++) | |
1477 | { | |
2cd58942 | 1478 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1479 | |
2cd58942 | 1480 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1481 | break; /* Break immediatly if we get something from |
0df8b418 | 1482 | the board. */ |
c5aa993b JM |
1483 | } |
1484 | } | |
1485 | } | |
c906108c SS |
1486 | break; |
1487 | case 4: | |
cdefc55d | 1488 | mips_error (_("Failed to initialize.")); |
c906108c SS |
1489 | } |
1490 | ||
1491 | if (mips_expect (mips_monitor_prompt)) | |
1492 | break; | |
1493 | } | |
1494 | ||
1495 | if (mips_monitor != MON_IDT) | |
1496 | { | |
1497 | /* Sometimes PMON ignores the first few characters in the first | |
1498 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1499 | around that. */ |
c906108c SS |
1500 | mips_send_command ("\r", -1); |
1501 | ||
1502 | /* Ensure the correct target state: */ | |
1503 | if (mips_monitor != MON_LSI) | |
1504 | mips_send_command ("set regsize 64\r", -1); | |
1505 | mips_send_command ("set hostport tty0\r", -1); | |
1506 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1507 | /* Delete all the current breakpoints: */ | |
1508 | mips_send_command ("db *\r", -1); | |
1509 | /* NOTE: PMON does not have breakpoint support through the | |
0df8b418 | 1510 | "debug" mode, only at the monitor command-line. */ |
c906108c SS |
1511 | } |
1512 | ||
1513 | mips_enter_debug (); | |
1514 | ||
1515 | /* Clear all breakpoints: */ | |
1516 | if ((mips_monitor == MON_IDT | |
06b1d59c | 1517 | && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) |
c906108c SS |
1518 | || mips_monitor == MON_LSI) |
1519 | monitor_supports_breakpoints = 1; | |
1520 | else | |
1521 | monitor_supports_breakpoints = 0; | |
1522 | ||
1523 | do_cleanups (old_cleanups); | |
1524 | ||
1525 | /* If this doesn't call error, we have connected; we don't care if | |
1526 | the request itself succeeds or fails. */ | |
1527 | ||
4014092b | 1528 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1529 | } |
1530 | ||
1531 | /* Open a connection to the remote board. */ | |
477c84a7 | 1532 | |
c906108c | 1533 | static void |
014f9477 | 1534 | common_open (struct target_ops *ops, const char *name, int from_tty, |
98691afe AC |
1535 | enum mips_monitor_type new_monitor, |
1536 | const char *new_monitor_prompt) | |
c906108c | 1537 | { |
c906108c SS |
1538 | char *serial_port_name; |
1539 | char *remote_name = 0; | |
1540 | char *local_name = 0; | |
1541 | char **argv; | |
d6a2e54a | 1542 | struct cleanup *cleanup; |
c906108c SS |
1543 | |
1544 | if (name == 0) | |
0df8b418 MS |
1545 | error (_("\ |
1546 | To open a MIPS remote debugging connection, you need to specify what\n\ | |
1547 | serial device is attached to the target board (e.g., /dev/ttya).\n\ | |
1548 | If you want to use TFTP to download to the board, specify the name of a\n\ | |
1549 | temporary file to be used by GDB for downloads as the second argument.\n\ | |
1550 | This filename must be in the form host:filename, where host is the name\n\ | |
1551 | of the host running the TFTP server, and the file must be readable by the\n\ | |
1552 | world. If the local name of the temporary file differs from the name as\n\ | |
1553 | seen from the board via TFTP, specify that name as the third parameter.\n")); | |
c906108c SS |
1554 | |
1555 | /* Parse the serial port name, the optional TFTP name, and the | |
1556 | optional local TFTP name. */ | |
d1a41061 | 1557 | argv = gdb_buildargv (name); |
d6a2e54a | 1558 | cleanup = make_cleanup_freeargv (argv); |
c906108c | 1559 | |
4fcf66da | 1560 | serial_port_name = xstrdup (argv[0]); |
0df8b418 | 1561 | if (argv[1]) /* Remote TFTP name specified? */ |
c906108c SS |
1562 | { |
1563 | remote_name = argv[1]; | |
0df8b418 | 1564 | if (argv[2]) /* Local TFTP filename specified? */ |
c906108c SS |
1565 | local_name = argv[2]; |
1566 | } | |
1567 | ||
1568 | target_preopen (from_tty); | |
1569 | ||
1570 | if (mips_is_open) | |
1571 | unpush_target (current_ops); | |
1572 | ||
1573 | /* Open and initialize the serial port. */ | |
2cd58942 | 1574 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1575 | if (mips_desc == NULL) |
c906108c SS |
1576 | perror_with_name (serial_port_name); |
1577 | ||
1578 | if (baud_rate != -1) | |
1579 | { | |
2cd58942 | 1580 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1581 | { |
2cd58942 | 1582 | serial_close (mips_desc); |
c5aa993b JM |
1583 | perror_with_name (serial_port_name); |
1584 | } | |
c906108c SS |
1585 | } |
1586 | ||
2cd58942 | 1587 | serial_raw (mips_desc); |
c906108c SS |
1588 | |
1589 | /* Open and initialize the optional download port. If it is in the form | |
1590 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1591 | hostname:filename, assume it's the TFTP filename that must be | |
1592 | passed to the DDB board to tell it where to get the load file. */ | |
1593 | if (remote_name) | |
1594 | { | |
1595 | if (strchr (remote_name, '#')) | |
1596 | { | |
2cd58942 | 1597 | udp_desc = serial_open (remote_name); |
c906108c | 1598 | if (!udp_desc) |
9b20d036 | 1599 | perror_with_name (_("Unable to open UDP port")); |
c906108c SS |
1600 | udp_in_use = 1; |
1601 | } | |
1602 | else | |
1603 | { | |
1604 | /* Save the remote and local names of the TFTP temp file. If | |
1605 | the user didn't specify a local name, assume it's the same | |
1606 | as the part of the remote name after the "host:". */ | |
1607 | if (tftp_name) | |
b8c9b27d | 1608 | xfree (tftp_name); |
c906108c | 1609 | if (tftp_localname) |
b8c9b27d | 1610 | xfree (tftp_localname); |
c906108c | 1611 | if (local_name == NULL) |
c5aa993b | 1612 | if ((local_name = strchr (remote_name, ':')) != NULL) |
0df8b418 | 1613 | local_name++; /* Skip over the colon. */ |
c906108c | 1614 | if (local_name == NULL) |
0df8b418 | 1615 | local_name = remote_name; /* Local name same as remote name. */ |
4fcf66da AC |
1616 | tftp_name = xstrdup (remote_name); |
1617 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1618 | tftp_in_use = 1; |
1619 | } | |
1620 | } | |
1621 | ||
1622 | current_ops = ops; | |
1623 | mips_is_open = 1; | |
1624 | ||
1625 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1626 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1627 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1628 | mips_monitor = new_monitor; |
1629 | ||
1630 | mips_initialize (); | |
1631 | ||
1632 | if (from_tty) | |
1633 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1634 | ||
1635 | /* Switch to using remote target now. */ | |
1636 | push_target (ops); | |
1637 | ||
8eeafb51 KB |
1638 | inferior_ptid = remote_mips_ptid; |
1639 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); | |
1640 | add_thread_silent (inferior_ptid); | |
c906108c SS |
1641 | |
1642 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1643 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1644 | |
a193e397 AC |
1645 | /* This is really the job of start_remote however, that makes an |
1646 | assumption that the target is about to print out a status message | |
1647 | of some sort. That doesn't happen here (in fact, it may not be | |
1648 | possible to get the monitor to send the appropriate packet). */ | |
c906108c | 1649 | |
35f196d9 | 1650 | reinit_frame_cache (); |
c906108c | 1651 | registers_changed (); |
fb14de7b | 1652 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1653 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1); |
b8c9b27d | 1654 | xfree (serial_port_name); |
d6a2e54a TT |
1655 | |
1656 | do_cleanups (cleanup); | |
c906108c SS |
1657 | } |
1658 | ||
477c84a7 KB |
1659 | /* Open a connection to an IDT board. */ |
1660 | ||
c906108c | 1661 | static void |
014f9477 | 1662 | mips_open (const char *name, int from_tty) |
c906108c | 1663 | { |
ef31c1ea | 1664 | const char *monitor_prompt = NULL; |
f5656ead TT |
1665 | if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL |
1666 | && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips) | |
ef31c1ea | 1667 | { |
f5656ead | 1668 | switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach) |
ef31c1ea AC |
1669 | { |
1670 | case bfd_mach_mips4100: | |
1671 | case bfd_mach_mips4300: | |
1672 | case bfd_mach_mips4600: | |
1673 | case bfd_mach_mips4650: | |
1674 | case bfd_mach_mips5000: | |
1675 | monitor_prompt = "<RISQ> "; | |
1676 | break; | |
1677 | } | |
1678 | } | |
1679 | if (monitor_prompt == NULL) | |
1680 | monitor_prompt = "<IDT>"; | |
1681 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1682 | } |
1683 | ||
477c84a7 KB |
1684 | /* Open a connection to a PMON board. */ |
1685 | ||
c906108c | 1686 | static void |
014f9477 | 1687 | pmon_open (const char *name, int from_tty) |
c906108c SS |
1688 | { |
1689 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1690 | } | |
1691 | ||
477c84a7 KB |
1692 | /* Open a connection to a DDB board. */ |
1693 | ||
c906108c | 1694 | static void |
014f9477 | 1695 | ddb_open (const char *name, int from_tty) |
c906108c SS |
1696 | { |
1697 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1698 | } | |
1699 | ||
bbd2783e KB |
1700 | /* Open a connection to a rockhopper board. */ |
1701 | ||
1702 | static void | |
014f9477 | 1703 | rockhopper_open (const char *name, int from_tty) |
bbd2783e KB |
1704 | { |
1705 | common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>"); | |
1706 | } | |
1707 | ||
477c84a7 KB |
1708 | /* Open a connection to an LSI board. */ |
1709 | ||
c906108c | 1710 | static void |
014f9477 | 1711 | lsi_open (const char *name, int from_tty) |
c906108c SS |
1712 | { |
1713 | int i; | |
1714 | ||
1715 | /* Clear the LSI breakpoint table. */ | |
1716 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1717 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1718 | |
c906108c SS |
1719 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1720 | } | |
1721 | ||
1722 | /* Close a connection to the remote board. */ | |
1723 | ||
1724 | static void | |
de90e03d | 1725 | mips_close (struct target_ops *self) |
c906108c SS |
1726 | { |
1727 | if (mips_is_open) | |
1728 | { | |
1729 | /* Get the board out of remote debugging mode. */ | |
1730 | (void) mips_exit_debug (); | |
1731 | ||
1732 | close_ports (); | |
1733 | } | |
8eeafb51 KB |
1734 | |
1735 | generic_mourn_inferior (); | |
c906108c SS |
1736 | } |
1737 | ||
1738 | /* Detach from the remote board. */ | |
1739 | ||
1740 | static void | |
52554a0e | 1741 | mips_detach (struct target_ops *ops, const char *args, int from_tty) |
c906108c SS |
1742 | { |
1743 | if (args) | |
9b20d036 | 1744 | error (_("Argument given to \"detach\" when remotely debugging.")); |
c906108c | 1745 | |
7fdc1521 | 1746 | unpush_target (ops); |
c906108c SS |
1747 | |
1748 | if (from_tty) | |
1749 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1750 | } | |
1751 | ||
1752 | /* Tell the target board to resume. This does not wait for a reply | |
1753 | from the board, except in the case of single-stepping on LSI boards, | |
1754 | where PMON does return a reply. */ | |
1755 | ||
1756 | static void | |
28439f5e | 1757 | mips_resume (struct target_ops *ops, |
2ea28649 | 1758 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c SS |
1759 | { |
1760 | int err; | |
1761 | ||
1762 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1763 | a single step, so we wait for that. */ | |
4014092b | 1764 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1765 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1766 | mips_receive_wait, NULL); | |
1767 | } | |
1768 | ||
1769 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1770 | the MIPS protocol uses for the signal. */ | |
477c84a7 | 1771 | |
2ea28649 | 1772 | static enum gdb_signal |
fba45db2 | 1773 | mips_signal_from_protocol (int sig) |
c906108c SS |
1774 | { |
1775 | /* We allow a few more signals than the IDT board actually returns, on | |
1776 | the theory that there is at least *some* hope that perhaps the numbering | |
1777 | for these signals is widely agreed upon. */ | |
1778 | if (sig <= 0 | |
1779 | || sig > 31) | |
a493e3e2 | 1780 | return GDB_SIGNAL_UNKNOWN; |
c906108c | 1781 | |
2ea28649 | 1782 | /* Don't want to use gdb_signal_from_host because we are converting |
c906108c SS |
1783 | from MIPS signal numbers, not host ones. Our internal numbers |
1784 | match the MIPS numbers for the signals the board can return, which | |
1785 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
2ea28649 | 1786 | return (enum gdb_signal) sig; |
c906108c SS |
1787 | } |
1788 | ||
bbd2783e KB |
1789 | /* Set the register designated by REGNO to the value designated by VALUE. */ |
1790 | ||
1791 | static void | |
1792 | mips_set_register (int regno, ULONGEST value) | |
1793 | { | |
e362b510 | 1794 | gdb_byte buf[MAX_REGISTER_SIZE]; |
bbd2783e KB |
1795 | struct regcache *regcache = get_current_regcache (); |
1796 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1797 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1798 | ||
1799 | /* We got the number the register holds, but gdb expects to see a | |
1800 | value in the target byte ordering. */ | |
1801 | ||
1802 | if (mips_monitor != MON_ROCKHOPPER | |
1803 | && (regno == mips_regnum (gdbarch)->pc || regno < 32)) | |
1804 | /* Some 64-bit boards have monitors that only send the bottom 32 bits. | |
1805 | In such cases we can only really debug 32-bit code properly so, | |
1806 | when reading a GPR or the PC, assume that the full 64-bit | |
1807 | value is the sign extension of the lower 32 bits. */ | |
1808 | store_signed_integer (buf, register_size (gdbarch, regno), byte_order, | |
1809 | value); | |
1810 | else | |
1811 | store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order, | |
1812 | value); | |
1813 | ||
1814 | regcache_raw_supply (regcache, regno, buf); | |
1815 | } | |
1816 | ||
c906108c SS |
1817 | /* Wait until the remote stops, and return a wait status. */ |
1818 | ||
39f77062 | 1819 | static ptid_t |
117de6a9 | 1820 | mips_wait (struct target_ops *ops, |
47608cb1 | 1821 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c SS |
1822 | { |
1823 | int rstatus; | |
1824 | int err; | |
1825 | char buff[DATA_MAXLEN]; | |
bbd2783e KB |
1826 | ULONGEST rpc, rfp, rsp; |
1827 | char pc_string[17], fp_string[17], sp_string[17], flags[20]; | |
c906108c | 1828 | int nfields; |
c906108c SS |
1829 | |
1830 | interrupt_count = 0; | |
1831 | hit_watchpoint = 0; | |
1832 | ||
1833 | /* If we have not sent a single step or continue command, then the | |
1834 | board is waiting for us to do something. Return a status | |
1835 | indicating that it is stopped. */ | |
c5aa993b | 1836 | if (!mips_need_reply) |
c906108c SS |
1837 | { |
1838 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1839 | status->value.sig = GDB_SIGNAL_TRAP; |
39f77062 | 1840 | return inferior_ptid; |
c906108c SS |
1841 | } |
1842 | ||
1843 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1844 | mips_wait_flag = 1; | |
4014092b | 1845 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1846 | mips_wait_flag = 0; |
1847 | if (err) | |
cdefc55d | 1848 | mips_error (_("Remote failure: %s"), safe_strerror (errno)); |
c906108c SS |
1849 | |
1850 | /* On returning from a continue, the PMON monitor seems to start | |
1851 | echoing back the messages we send prior to sending back the | |
0df8b418 | 1852 | ACK. The code can cope with this, but to try and avoid the |
c906108c | 1853 | unnecessary serial traffic, and "spurious" characters displayed |
0df8b418 | 1854 | to the user, we cheat and reset the debug protocol. The problems |
c906108c SS |
1855 | seems to be caused by a check on the number of arguments, and the |
1856 | command length, within the monitor causing it to echo the command | |
0df8b418 | 1857 | as a bad packet. */ |
c906108c SS |
1858 | if (mips_monitor == MON_PMON) |
1859 | { | |
1860 | mips_exit_debug (); | |
1861 | mips_enter_debug (); | |
1862 | } | |
1863 | ||
0df8b418 MS |
1864 | /* See if we got back extended status. If so, pick out the pc, fp, |
1865 | sp, etc... */ | |
c906108c | 1866 | |
0df8b418 MS |
1867 | nfields = sscanf (buff, |
1868 | "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s", | |
bbd2783e KB |
1869 | pc_string, fp_string, sp_string, flags); |
1870 | if (nfields >= 3 | |
1871 | && read_hex_value (pc_string, &rpc) | |
1872 | && read_hex_value (fp_string, &rfp) | |
1873 | && read_hex_value (sp_string, &rsp)) | |
c906108c | 1874 | { |
594f7785 | 1875 | struct regcache *regcache = get_current_regcache (); |
2eb4d78b | 1876 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bbd2783e KB |
1877 | |
1878 | mips_set_register (gdbarch_pc_regnum (gdbarch), rpc); | |
1879 | mips_set_register (30, rfp); | |
1880 | mips_set_register (gdbarch_sp_regnum (gdbarch), rsp); | |
c906108c SS |
1881 | |
1882 | if (nfields == 9) | |
1883 | { | |
1884 | int i; | |
1885 | ||
1886 | for (i = 0; i <= 2; i++) | |
1887 | if (flags[i] == 'r' || flags[i] == 'w') | |
1888 | hit_watchpoint = 1; | |
1889 | else if (flags[i] == '\000') | |
1890 | break; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | if (strcmp (target_shortname, "lsi") == 0) | |
1895 | { | |
1896 | #if 0 | |
0df8b418 MS |
1897 | /* If this is an LSI PMON target, see if we just hit a |
1898 | hardrdware watchpoint. Right now, PMON doesn't give us | |
1899 | enough information to determine which breakpoint we hit. So | |
1900 | we have to look up the PC in our own table of breakpoints, | |
1901 | and if found, assume it's just a normal instruction fetch | |
1902 | breakpoint, not a data watchpoint. FIXME when PMON provides | |
1903 | some way to tell us what type of breakpoint it is. */ | |
c906108c | 1904 | int i; |
fb14de7b | 1905 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1906 | |
1907 | hit_watchpoint = 1; | |
1908 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1909 | { | |
1910 | if (lsi_breakpoints[i].addr == pc | |
1911 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1912 | { | |
1913 | hit_watchpoint = 0; | |
1914 | break; | |
1915 | } | |
1916 | } | |
1917 | #else | |
1918 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1919 | 0x1 c 0x0 0x57f 0x1 |
1920 | The return packet from an ordinary breakpoint doesn't have the | |
1921 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1922 | if (nfields == 1 && rpc == 1) |
1923 | hit_watchpoint = 1; | |
1924 | #endif | |
1925 | } | |
1926 | ||
1927 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1928 | SPP_SIGTRAP 5 breakpoint |
1929 | SPP_SIGINT 2 | |
1930 | SPP_SIGSEGV 11 | |
1931 | SPP_SIGBUS 10 | |
1932 | SPP_SIGILL 4 | |
1933 | SPP_SIGFPE 8 | |
1934 | SPP_SIGTERM 15 */ | |
c906108c SS |
1935 | |
1936 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1937 | and so on, because the constants we want here are determined by the | |
1938 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1939 | if ((rstatus & 0xff) == 0) | |
1940 | { | |
1941 | status->kind = TARGET_WAITKIND_EXITED; | |
1942 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1943 | } | |
1944 | else if ((rstatus & 0xff) == 0x7f) | |
1945 | { | |
1946 | status->kind = TARGET_WAITKIND_STOPPED; | |
1947 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1948 | ||
1949 | /* If the stop PC is in the _exit function, assume | |
1950 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1951 | is not a normal breakpoint. */ |
c906108c SS |
1952 | if (strcmp (target_shortname, "lsi") == 0) |
1953 | { | |
2c02bd72 | 1954 | const char *func_name; |
c906108c | 1955 | CORE_ADDR func_start; |
fb14de7b | 1956 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1957 | |
1958 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1959 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1960 | && func_start == pc) | |
1961 | status->kind = TARGET_WAITKIND_EXITED; | |
1962 | } | |
1963 | } | |
1964 | else | |
1965 | { | |
1966 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1967 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1968 | } | |
1969 | ||
39f77062 | 1970 | return inferior_ptid; |
c906108c SS |
1971 | } |
1972 | ||
1973 | /* We have to map between the register numbers used by gdb and the | |
82e34d2f | 1974 | register numbers used by the debugging protocol. */ |
c906108c SS |
1975 | |
1976 | #define REGNO_OFFSET 96 | |
1977 | ||
1978 | static int | |
74ed0bb4 | 1979 | mips_map_regno (struct gdbarch *gdbarch, int regno) |
c906108c SS |
1980 | { |
1981 | if (regno < 32) | |
1982 | return regno; | |
74ed0bb4 MD |
1983 | if (regno >= mips_regnum (gdbarch)->fp0 |
1984 | && regno < mips_regnum (gdbarch)->fp0 + 32) | |
1985 | return regno - mips_regnum (gdbarch)->fp0 + 32; | |
1986 | else if (regno == mips_regnum (gdbarch)->pc) | |
56cea623 | 1987 | return REGNO_OFFSET + 0; |
74ed0bb4 | 1988 | else if (regno == mips_regnum (gdbarch)->cause) |
56cea623 | 1989 | return REGNO_OFFSET + 1; |
74ed0bb4 | 1990 | else if (regno == mips_regnum (gdbarch)->hi) |
56cea623 | 1991 | return REGNO_OFFSET + 2; |
74ed0bb4 | 1992 | else if (regno == mips_regnum (gdbarch)->lo) |
56cea623 | 1993 | return REGNO_OFFSET + 3; |
74ed0bb4 | 1994 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
56cea623 | 1995 | return REGNO_OFFSET + 4; |
74ed0bb4 | 1996 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
56cea623 AC |
1997 | return REGNO_OFFSET + 5; |
1998 | else | |
1999 | /* FIXME: Is there a way to get the status register? */ | |
2000 | return 0; | |
c906108c SS |
2001 | } |
2002 | ||
2003 | /* Fetch the remote registers. */ | |
2004 | ||
2005 | static void | |
28439f5e PA |
2006 | mips_fetch_registers (struct target_ops *ops, |
2007 | struct regcache *regcache, int regno) | |
c906108c | 2008 | { |
2eb4d78b | 2009 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 2010 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
bbd2783e | 2011 | ULONGEST val; |
c906108c SS |
2012 | int err; |
2013 | ||
2014 | if (regno == -1) | |
2015 | { | |
2eb4d78b | 2016 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 2017 | mips_fetch_registers (ops, regcache, regno); |
c906108c SS |
2018 | return; |
2019 | } | |
2020 | ||
2eb4d78b | 2021 | if (regno == gdbarch_deprecated_fp_regnum (gdbarch) |
064f5156 UW |
2022 | || regno == MIPS_ZERO_REGNUM) |
2023 | /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just | |
0ba6dca9 | 2024 | supposed to read zero (see also mips-nat.c). */ |
c906108c SS |
2025 | val = 0; |
2026 | else | |
2027 | { | |
2028 | /* If PMON doesn't support this register, don't waste serial | |
2029 | bandwidth trying to read it. */ | |
74ed0bb4 | 2030 | int pmon_reg = mips_map_regno (gdbarch, regno); |
123f5f96 | 2031 | |
c906108c SS |
2032 | if (regno != 0 && pmon_reg == 0) |
2033 | val = 0; | |
2034 | else | |
2035 | { | |
2036 | /* Unfortunately the PMON version in the Vr4300 board has been | |
0df8b418 MS |
2037 | compiled without the 64bit register access commands. This |
2038 | means we cannot get hold of the full register width. */ | |
bbd2783e KB |
2039 | if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER) |
2040 | val = mips_request ('t', pmon_reg, 0, | |
2041 | &err, mips_receive_wait, NULL); | |
c906108c | 2042 | else |
4014092b AC |
2043 | val = mips_request ('r', pmon_reg, 0, |
2044 | &err, mips_receive_wait, NULL); | |
c906108c | 2045 | if (err) |
cdefc55d | 2046 | mips_error (_("Can't read register %d: %s"), regno, |
c906108c SS |
2047 | safe_strerror (errno)); |
2048 | } | |
2049 | } | |
2050 | ||
bbd2783e | 2051 | mips_set_register (regno, val); |
c906108c SS |
2052 | } |
2053 | ||
2054 | /* Prepare to store registers. The MIPS protocol can store individual | |
2055 | registers, so this function doesn't have to do anything. */ | |
2056 | ||
2057 | static void | |
f32dbf8c | 2058 | mips_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c SS |
2059 | { |
2060 | } | |
2061 | ||
2062 | /* Store remote register(s). */ | |
2063 | ||
2064 | static void | |
28439f5e PA |
2065 | mips_store_registers (struct target_ops *ops, |
2066 | struct regcache *regcache, int regno) | |
c906108c | 2067 | { |
2eb4d78b | 2068 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
56be3814 | 2069 | ULONGEST val; |
c906108c SS |
2070 | int err; |
2071 | ||
2072 | if (regno == -1) | |
2073 | { | |
2eb4d78b | 2074 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 2075 | mips_store_registers (ops, regcache, regno); |
c906108c SS |
2076 | return; |
2077 | } | |
2078 | ||
56be3814 | 2079 | regcache_cooked_read_unsigned (regcache, regno, &val); |
bbd2783e KB |
2080 | mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R', |
2081 | mips_map_regno (gdbarch, regno), | |
2082 | val, | |
c906108c SS |
2083 | &err, mips_receive_wait, NULL); |
2084 | if (err) | |
cdefc55d KB |
2085 | mips_error (_("Can't write register %d: %s"), regno, |
2086 | safe_strerror (errno)); | |
c906108c SS |
2087 | } |
2088 | ||
8cfa2c71 KB |
2089 | /* Fetch a word from the target board. Return word fetched in location |
2090 | addressed by VALP. Return 0 when successful; return positive error | |
2091 | code when not. */ | |
c906108c | 2092 | |
8cfa2c71 KB |
2093 | static int |
2094 | mips_fetch_word (CORE_ADDR addr, unsigned int *valp) | |
c906108c | 2095 | { |
c906108c SS |
2096 | int err; |
2097 | ||
8cfa2c71 | 2098 | *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
2099 | if (err) |
2100 | { | |
2101 | /* Data space failed; try instruction space. */ | |
8cfa2c71 KB |
2102 | *valp = mips_request ('i', addr, 0, &err, |
2103 | mips_receive_wait, NULL); | |
c906108c | 2104 | } |
8cfa2c71 | 2105 | return err; |
c906108c SS |
2106 | } |
2107 | ||
2108 | /* Store a word to the target board. Returns errno code or zero for | |
2109 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2110 | memory location there. */ | |
2111 | ||
0df8b418 | 2112 | /* FIXME! make sure only 32-bit quantities get stored! */ |
c906108c | 2113 | static int |
e17a4113 | 2114 | mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents) |
c906108c SS |
2115 | { |
2116 | int err; | |
2117 | unsigned int oldcontents; | |
2118 | ||
4014092b | 2119 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2120 | mips_receive_wait, NULL); |
2121 | if (err) | |
2122 | { | |
2123 | /* Data space failed; try instruction space. */ | |
4014092b | 2124 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2125 | mips_receive_wait, NULL); |
2126 | if (err) | |
2127 | return errno; | |
2128 | } | |
2129 | if (old_contents != NULL) | |
e17a4113 | 2130 | *old_contents = oldcontents; |
c906108c SS |
2131 | return 0; |
2132 | } | |
2133 | ||
6df1b29f PA |
2134 | /* Helper for mips_xfer_partial that handles memory transfers. |
2135 | Arguments are like target_xfer_partial. Note that the protocol | |
2136 | gives us the correct value for a longword, since it transfers | |
2137 | values in ASCII. We want the byte values, so we have to swap the | |
2138 | longword values. */ | |
c906108c | 2139 | |
4014092b AC |
2140 | static int mask_address_p = 1; |
2141 | ||
6df1b29f PA |
2142 | static enum target_xfer_status |
2143 | mips_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2144 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c906108c | 2145 | { |
f5656ead | 2146 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
4014092b AC |
2147 | int i; |
2148 | CORE_ADDR addr; | |
2149 | int count; | |
948f8e3d | 2150 | gdb_byte *buffer; |
4014092b AC |
2151 | int status; |
2152 | ||
2153 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
0df8b418 | 2154 | value down to 32 bits. */ |
4014092b AC |
2155 | if (mask_address_p) |
2156 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2157 | ||
c906108c | 2158 | /* Round starting address down to longword boundary. */ |
4014092b | 2159 | addr = memaddr & ~3; |
c906108c | 2160 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2161 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2162 | /* Allocate buffer of that many longwords. */ |
4014092b | 2163 | buffer = alloca (count * 4); |
c906108c | 2164 | |
6df1b29f | 2165 | if (writebuf != NULL) |
c906108c SS |
2166 | { |
2167 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2168 | if (addr != memaddr || len < 4) | |
2169 | { | |
8cfa2c71 KB |
2170 | unsigned int val; |
2171 | ||
2172 | if (mips_fetch_word (addr, &val)) | |
6df1b29f | 2173 | return TARGET_XFER_E_IO; |
8cfa2c71 | 2174 | |
c906108c | 2175 | /* Need part of initial word -- fetch it. */ |
8cfa2c71 | 2176 | store_unsigned_integer (&buffer[0], 4, byte_order, val); |
c906108c SS |
2177 | } |
2178 | ||
2179 | if (count > 1) | |
2180 | { | |
8cfa2c71 KB |
2181 | unsigned int val; |
2182 | ||
c906108c SS |
2183 | /* Need part of last word -- fetch it. FIXME: we do this even |
2184 | if we don't need it. */ | |
8cfa2c71 | 2185 | if (mips_fetch_word (addr + (count - 1) * 4, &val)) |
6df1b29f | 2186 | return TARGET_XFER_E_IO; |
8cfa2c71 | 2187 | |
0df8b418 MS |
2188 | store_unsigned_integer (&buffer[(count - 1) * 4], |
2189 | 4, byte_order, val); | |
c906108c SS |
2190 | } |
2191 | ||
0df8b418 | 2192 | /* Copy data to be written over corresponding part of buffer. */ |
c906108c | 2193 | |
6df1b29f | 2194 | memcpy ((char *) buffer + (memaddr & 3), writebuf, len); |
c906108c SS |
2195 | |
2196 | /* Write the entire buffer. */ | |
2197 | ||
2198 | for (i = 0; i < count; i++, addr += 4) | |
2199 | { | |
e17a4113 | 2200 | int word; |
123f5f96 | 2201 | |
e17a4113 UW |
2202 | word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order); |
2203 | status = mips_store_word (addr, word, NULL); | |
0df8b418 | 2204 | /* Report each kilobyte (we download 32-bit words at a time). */ |
c5aa993b | 2205 | if (i % 256 == 255) |
c906108c SS |
2206 | { |
2207 | printf_unfiltered ("*"); | |
2208 | gdb_flush (gdb_stdout); | |
2209 | } | |
2210 | if (status) | |
6df1b29f | 2211 | return TARGET_XFER_E_IO; |
c906108c SS |
2212 | /* FIXME: Do we want a QUIT here? */ |
2213 | } | |
2214 | if (count >= 256) | |
2215 | printf_unfiltered ("\n"); | |
2216 | } | |
2217 | else | |
2218 | { | |
0df8b418 | 2219 | /* Read all the longwords. */ |
c906108c SS |
2220 | for (i = 0; i < count; i++, addr += 4) |
2221 | { | |
8cfa2c71 KB |
2222 | unsigned int val; |
2223 | ||
2224 | if (mips_fetch_word (addr, &val)) | |
6df1b29f | 2225 | return TARGET_XFER_E_IO; |
8cfa2c71 KB |
2226 | |
2227 | store_unsigned_integer (&buffer[i * 4], 4, byte_order, val); | |
c906108c SS |
2228 | QUIT; |
2229 | } | |
2230 | ||
2231 | /* Copy appropriate bytes out of the buffer. */ | |
6df1b29f | 2232 | memcpy (readbuf, buffer + (memaddr & 3), len); |
c906108c | 2233 | } |
5ee8a82c YQ |
2234 | *xfered_len = len; |
2235 | return TARGET_XFER_OK; | |
c906108c SS |
2236 | } |
2237 | ||
6df1b29f PA |
2238 | /* Target to_xfer_partial implementation. */ |
2239 | ||
2240 | static enum target_xfer_status | |
2241 | mips_xfer_partial (struct target_ops *ops, enum target_object object, | |
2242 | const char *annex, gdb_byte *readbuf, | |
2243 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
2244 | ULONGEST *xfered_len) | |
2245 | { | |
2246 | switch (object) | |
2247 | { | |
2248 | case TARGET_OBJECT_MEMORY: | |
2249 | return mips_xfer_memory (readbuf, writebuf, offset, len, xfered_len); | |
2250 | ||
2251 | default: | |
2252 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
2253 | readbuf, writebuf, offset, len, | |
2254 | xfered_len); | |
2255 | } | |
2256 | } | |
2257 | ||
c906108c SS |
2258 | /* Print info on this target. */ |
2259 | ||
2260 | static void | |
fba45db2 | 2261 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2262 | { |
2263 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2264 | } | |
2265 | ||
2266 | /* Kill the process running on the board. This will actually only | |
2267 | work if we are doing remote debugging over the console input. I | |
2268 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2269 | right port, we could interrupt the process with a break signal. */ | |
2270 | ||
2271 | static void | |
7d85a9c0 | 2272 | mips_kill (struct target_ops *ops) |
c906108c SS |
2273 | { |
2274 | if (!mips_wait_flag) | |
8eeafb51 KB |
2275 | { |
2276 | target_mourn_inferior (); | |
2277 | return; | |
2278 | } | |
c906108c SS |
2279 | |
2280 | interrupt_count++; | |
2281 | ||
2282 | if (interrupt_count >= 2) | |
2283 | { | |
2284 | interrupt_count = 0; | |
2285 | ||
2286 | target_terminal_ours (); | |
2287 | ||
9e2f0ad4 HZ |
2288 | if (query (_("Interrupted while waiting for the program.\n\ |
2289 | Give up (and stop debugging it)? "))) | |
c906108c | 2290 | { |
0df8b418 MS |
2291 | /* Clean up in such a way that mips_close won't try to talk |
2292 | to the board (it almost surely won't work since we | |
2293 | weren't able to talk to it). */ | |
c906108c | 2294 | mips_wait_flag = 0; |
c5aa993b | 2295 | close_ports (); |
c906108c SS |
2296 | |
2297 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2298 | target_mourn_inferior (); | |
039e3c22 | 2299 | quit (); |
c906108c SS |
2300 | } |
2301 | ||
2302 | target_terminal_inferior (); | |
2303 | } | |
2304 | ||
2305 | if (remote_debug > 0) | |
2306 | printf_unfiltered ("Sending break\n"); | |
2307 | ||
2cd58942 | 2308 | serial_send_break (mips_desc); |
c906108c | 2309 | |
8eeafb51 KB |
2310 | target_mourn_inferior (); |
2311 | ||
c906108c SS |
2312 | #if 0 |
2313 | if (mips_is_open) | |
2314 | { | |
2315 | char cc; | |
2316 | ||
2317 | /* Send a ^C. */ | |
2318 | cc = '\003'; | |
2cd58942 | 2319 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2320 | sleep (1); |
2321 | target_mourn_inferior (); | |
2322 | } | |
2323 | #endif | |
2324 | } | |
2325 | ||
2326 | /* Start running on the target board. */ | |
2327 | ||
2328 | static void | |
383c0389 JB |
2329 | mips_create_inferior (struct target_ops *ops, char *execfile, |
2330 | char *args, char **env, int from_tty) | |
c906108c SS |
2331 | { |
2332 | CORE_ADDR entry_pt; | |
2333 | ||
2334 | if (args && *args) | |
2335 | { | |
cdefc55d KB |
2336 | warning (_("\ |
2337 | Can't pass arguments to remote MIPS board; arguments ignored.")); | |
c906108c SS |
2338 | /* And don't try to use them on the next "run" command. */ |
2339 | execute_command ("set args", 0); | |
2340 | } | |
2341 | ||
2342 | if (execfile == 0 || exec_bfd == 0) | |
9b20d036 | 2343 | error (_("No executable file specified")); |
c906108c SS |
2344 | |
2345 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2346 | ||
2347 | init_wait_for_inferior (); | |
2348 | ||
fb14de7b | 2349 | regcache_write_pc (get_current_regcache (), entry_pt); |
c906108c SS |
2350 | } |
2351 | ||
8eeafb51 KB |
2352 | /* Clean up after a process. The bulk of the work is done in mips_close(), |
2353 | which is called when unpushing the target. */ | |
c906108c SS |
2354 | |
2355 | static void | |
383c0389 | 2356 | mips_mourn_inferior (struct target_ops *ops) |
c906108c SS |
2357 | { |
2358 | if (current_ops != NULL) | |
2359 | unpush_target (current_ops); | |
c906108c SS |
2360 | } |
2361 | \f | |
2362 | /* We can write a breakpoint and read the shadow contents in one | |
2363 | operation. */ | |
2364 | ||
aaab4dba AC |
2365 | /* Insert a breakpoint. On targets that don't have built-in |
2366 | breakpoint support, we read the contents of the target location and | |
2367 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
8181d85f DJ |
2368 | the target location in the target machine. BPT is the breakpoint |
2369 | being inserted or removed, which contains memory for saving the | |
2370 | target contents. */ | |
c906108c SS |
2371 | |
2372 | static int | |
3db08215 | 2373 | mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
a6d9a66e | 2374 | struct bp_target_info *bp_tgt) |
c906108c SS |
2375 | { |
2376 | if (monitor_supports_breakpoints) | |
0d5ed153 MR |
2377 | { |
2378 | bp_tgt->placed_address = bp_tgt->reqstd_address; | |
2379 | return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, | |
2380 | BREAK_FETCH); | |
2381 | } | |
c906108c | 2382 | else |
3db08215 | 2383 | return memory_insert_breakpoint (ops, gdbarch, bp_tgt); |
c906108c SS |
2384 | } |
2385 | ||
477c84a7 KB |
2386 | /* Remove a breakpoint. */ |
2387 | ||
c906108c | 2388 | static int |
3db08215 | 2389 | mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
a6d9a66e | 2390 | struct bp_target_info *bp_tgt) |
c906108c SS |
2391 | { |
2392 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2393 | return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2394 | BREAK_FETCH); | |
c906108c | 2395 | else |
3db08215 | 2396 | return memory_remove_breakpoint (ops, gdbarch, bp_tgt); |
c906108c SS |
2397 | } |
2398 | ||
c906108c SS |
2399 | /* Tell whether this target can support a hardware breakpoint. CNT |
2400 | is the number of hardware breakpoints already installed. This | |
d92524f1 | 2401 | implements the target_can_use_hardware_watchpoint macro. */ |
c906108c | 2402 | |
693be288 | 2403 | static int |
5461485a TT |
2404 | mips_can_use_watchpoint (struct target_ops *self, |
2405 | int type, int cnt, int othertype) | |
c906108c | 2406 | { |
c5aa993b | 2407 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2408 | } |
2409 | ||
2410 | ||
2411 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2412 | This is used for memory ref breakpoints. */ | |
2413 | ||
2414 | static unsigned long | |
fba45db2 | 2415 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2416 | { |
2417 | unsigned long mask; | |
2418 | int i; | |
2419 | ||
2420 | mask = addr ^ (addr + len - 1); | |
2421 | ||
2422 | for (i = 32; i >= 0; i--) | |
2423 | if (mask == 0) | |
2424 | break; | |
2425 | else | |
2426 | mask >>= 1; | |
2427 | ||
2428 | mask = (unsigned long) 0xffffffff >> i; | |
2429 | ||
2430 | return mask; | |
2431 | } | |
2432 | ||
2433 | ||
c906108c SS |
2434 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
2435 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
0df8b418 | 2436 | watchpoint. */ |
c906108c | 2437 | |
693be288 | 2438 | static int |
7bb99c53 TT |
2439 | mips_insert_watchpoint (struct target_ops *self, |
2440 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 2441 | struct expression *cond) |
c906108c | 2442 | { |
06b1d59c | 2443 | if (mips_set_breakpoint (addr, len, type)) |
c906108c SS |
2444 | return -1; |
2445 | ||
2446 | return 0; | |
2447 | } | |
2448 | ||
477c84a7 KB |
2449 | /* Remove a watchpoint. */ |
2450 | ||
693be288 | 2451 | static int |
11b5219a TT |
2452 | mips_remove_watchpoint (struct target_ops *self, |
2453 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 2454 | struct expression *cond) |
c906108c | 2455 | { |
06b1d59c | 2456 | if (mips_clear_breakpoint (addr, len, type)) |
c906108c SS |
2457 | return -1; |
2458 | ||
2459 | return 0; | |
2460 | } | |
2461 | ||
477c84a7 KB |
2462 | /* Test to see if a watchpoint has been hit. Return 1 if so; return 0, |
2463 | if not. */ | |
2464 | ||
693be288 | 2465 | static int |
6a109b6b | 2466 | mips_stopped_by_watchpoint (struct target_ops *ops) |
c906108c SS |
2467 | { |
2468 | return hit_watchpoint; | |
2469 | } | |
2470 | ||
2471 | ||
2472 | /* Insert a breakpoint. */ | |
2473 | ||
2474 | static int | |
06b1d59c | 2475 | mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2476 | { |
06b1d59c | 2477 | return mips_common_breakpoint (1, addr, len, type); |
c906108c SS |
2478 | } |
2479 | ||
2480 | ||
2481 | /* Clear a breakpoint. */ | |
2482 | ||
2483 | static int | |
06b1d59c | 2484 | mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2485 | { |
06b1d59c | 2486 | return mips_common_breakpoint (0, addr, len, type); |
c906108c SS |
2487 | } |
2488 | ||
2489 | ||
2490 | /* Check the error code from the return packet for an LSI breakpoint | |
2491 | command. If there's no error, just return 0. If it's a warning, | |
2492 | print the warning text and return 0. If it's an error, print | |
2493 | the error text and return 1. <ADDR> is the address of the breakpoint | |
0df8b418 | 2494 | that was being set. <RERRFLG> is the error code returned by PMON. |
06b1d59c | 2495 | This is a helper function for mips_common_breakpoint. */ |
c906108c SS |
2496 | |
2497 | static int | |
06b1d59c | 2498 | mips_check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2499 | { |
2500 | struct lsi_error *err; | |
f5656ead | 2501 | const char *saddr = paddress (target_gdbarch (), addr); |
c906108c SS |
2502 | |
2503 | if (rerrflg == 0) /* no error */ | |
2504 | return 0; | |
2505 | ||
2506 | /* Warnings can be ORed together, so check them all. */ | |
2507 | if (rerrflg & W_WARN) | |
2508 | { | |
2509 | if (monitor_warnings) | |
2510 | { | |
2511 | int found = 0; | |
123f5f96 | 2512 | |
c906108c SS |
2513 | for (err = lsi_warning_table; err->code != 0; err++) |
2514 | { | |
2515 | if ((err->code & rerrflg) == err->code) | |
2516 | { | |
2517 | found = 1; | |
06b1d59c | 2518 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2519 | mips_common_breakpoint (%s): Warning: %s\n", |
c906108c SS |
2520 | saddr, |
2521 | err->string); | |
2522 | } | |
2523 | } | |
2524 | if (!found) | |
06b1d59c | 2525 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2526 | mips_common_breakpoint (%s): Unknown warning: 0x%x\n", |
c906108c SS |
2527 | saddr, |
2528 | rerrflg); | |
2529 | } | |
2530 | return 0; | |
2531 | } | |
2532 | ||
2533 | /* Errors are unique, i.e. can't be ORed together. */ | |
2534 | for (err = lsi_error_table; err->code != 0; err++) | |
2535 | { | |
2536 | if ((err->code & rerrflg) == err->code) | |
2537 | { | |
06b1d59c | 2538 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2539 | mips_common_breakpoint (%s): Error: %s\n", |
c906108c SS |
2540 | saddr, |
2541 | err->string); | |
2542 | return 1; | |
2543 | } | |
2544 | } | |
06b1d59c | 2545 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2546 | mips_common_breakpoint (%s): Unknown error: 0x%x\n", |
c906108c SS |
2547 | saddr, |
2548 | rerrflg); | |
2549 | return 1; | |
2550 | } | |
2551 | ||
2552 | ||
2553 | /* This routine sends a breakpoint command to the remote target. | |
2554 | ||
2555 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2556 | <ADDR> is the address of the breakpoint. | |
2557 | <LEN> the length of the region to break on. | |
2558 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2559 | 0 = write (BREAK_WRITE) |
2560 | 1 = read (BREAK_READ) | |
2561 | 2 = read/write (BREAK_ACCESS) | |
2562 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2563 | |
2564 | Return 0 if successful; otherwise 1. */ | |
2565 | ||
2566 | static int | |
06b1d59c | 2567 | mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2568 | { |
f5656ead | 2569 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
c906108c SS |
2570 | char buf[DATA_MAXLEN + 1]; |
2571 | char cmd, rcmd; | |
2572 | int rpid, rerrflg, rresponse, rlen; | |
2573 | int nfields; | |
2574 | ||
f5656ead | 2575 | addr = gdbarch_addr_bits_remove (target_gdbarch (), addr); |
c906108c SS |
2576 | |
2577 | if (mips_monitor == MON_LSI) | |
2578 | { | |
c5aa993b | 2579 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2580 | { |
2581 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2582 | <pid> 'b' <bptn> 0x0 |
2583 | reply: | |
2584 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2585 | |
2586 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2587 | Possible return codes: OK, E_BPT. */ | |
2588 | ||
2589 | int i; | |
2590 | ||
2591 | /* Search for the breakpoint in the table. */ | |
2592 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2593 | if (lsi_breakpoints[i].type == type | |
2594 | && lsi_breakpoints[i].addr == addr | |
2595 | && lsi_breakpoints[i].len == len) | |
2596 | break; | |
2597 | ||
2598 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2599 | if (i == MAX_LSI_BREAKPOINTS) | |
2600 | { | |
cdefc55d KB |
2601 | warning (_("\ |
2602 | mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"), | |
f5656ead | 2603 | paddress (target_gdbarch (), addr)); |
c906108c SS |
2604 | return 1; |
2605 | } | |
2606 | ||
2607 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2608 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2609 | mips_send_packet (buf, 1); | |
2610 | ||
2611 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2612 | buf[rlen] = '\0'; | |
2613 | ||
2614 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2615 | if (nfields != 2) | |
cdefc55d KB |
2616 | mips_error (_("mips_common_breakpoint: " |
2617 | "Bad response from remote board: %s"), | |
06b1d59c | 2618 | buf); |
c906108c | 2619 | |
06b1d59c | 2620 | return (mips_check_lsi_error (addr, rerrflg)); |
c906108c | 2621 | } |
c5aa993b JM |
2622 | else |
2623 | /* set a breakpoint */ | |
c906108c SS |
2624 | { |
2625 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2626 | <pid> 'B' <addr> 0x0 |
2627 | reply: | |
2628 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2629 | |
2630 | The "set data breakpoint" command has this form: | |
2631 | ||
c5aa993b | 2632 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2633 | |
c5aa993b JM |
2634 | where: type= "0x1" = read |
2635 | "0x2" = write | |
2636 | "0x3" = access (read or write) | |
c906108c SS |
2637 | |
2638 | The reply returns two values: | |
c5aa993b JM |
2639 | bptn - a breakpoint number, which is a small integer with |
2640 | possible values of zero through 255. | |
2641 | code - an error return code, a value of zero indicates a | |
2642 | succesful completion, other values indicate various | |
2643 | errors and warnings. | |
2644 | ||
0df8b418 | 2645 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */ |
c906108c SS |
2646 | |
2647 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2648 | { | |
2649 | cmd = 'B'; | |
5af949e3 | 2650 | sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size)); |
c906108c | 2651 | } |
c5aa993b JM |
2652 | else |
2653 | /* watchpoint */ | |
c906108c SS |
2654 | { |
2655 | cmd = 'A'; | |
5af949e3 UW |
2656 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", |
2657 | phex_nz (addr, addr_size), | |
2658 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), | |
2659 | phex_nz (addr + len - 1, addr_size)); | |
c906108c SS |
2660 | } |
2661 | mips_send_packet (buf, 1); | |
2662 | ||
2663 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2664 | buf[rlen] = '\0'; | |
2665 | ||
2666 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2667 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2668 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
cdefc55d KB |
2669 | mips_error (_("mips_common_breakpoint: " |
2670 | "Bad response from remote board: %s"), | |
06b1d59c | 2671 | buf); |
c906108c SS |
2672 | |
2673 | if (rerrflg != 0) | |
06b1d59c | 2674 | if (mips_check_lsi_error (addr, rerrflg)) |
c906108c SS |
2675 | return 1; |
2676 | ||
2677 | /* rresponse contains PMON's breakpoint number. Record the | |
2678 | information for this breakpoint so we can clear it later. */ | |
2679 | lsi_breakpoints[rresponse].type = type; | |
2680 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2681 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2682 | |
2683 | return 0; | |
2684 | } | |
2685 | } | |
2686 | else | |
2687 | { | |
2688 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2689 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2690 | <MASK> is a don't care mask for addresses. | |
0df8b418 MS |
2691 | <FLAGS> is any combination of `r', `w', or `f' for |
2692 | read/write/fetch. */ | |
2693 | ||
c906108c SS |
2694 | unsigned long mask; |
2695 | ||
2696 | mask = calculate_mask (addr, len); | |
2697 | addr &= ~mask; | |
2698 | ||
c5aa993b JM |
2699 | if (set) /* set a breakpoint */ |
2700 | { | |
c906108c | 2701 | char *flags; |
123f5f96 | 2702 | |
c906108c SS |
2703 | switch (type) |
2704 | { | |
c5aa993b | 2705 | case BREAK_WRITE: /* write */ |
c906108c SS |
2706 | flags = "w"; |
2707 | break; | |
c5aa993b | 2708 | case BREAK_READ: /* read */ |
c906108c SS |
2709 | flags = "r"; |
2710 | break; | |
c5aa993b | 2711 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2712 | flags = "rw"; |
2713 | break; | |
c5aa993b | 2714 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2715 | flags = "f"; |
2716 | break; | |
2717 | default: | |
0df8b418 MS |
2718 | internal_error (__FILE__, __LINE__, |
2719 | _("failed internal consistency check")); | |
c906108c SS |
2720 | } |
2721 | ||
2722 | cmd = 'B'; | |
5af949e3 UW |
2723 | sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size), |
2724 | phex_nz (mask, addr_size), flags); | |
c906108c SS |
2725 | } |
2726 | else | |
2727 | { | |
2728 | cmd = 'b'; | |
5af949e3 | 2729 | sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size)); |
c906108c SS |
2730 | } |
2731 | ||
2732 | mips_send_packet (buf, 1); | |
2733 | ||
2734 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2735 | buf[rlen] = '\0'; | |
2736 | ||
2737 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2738 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2739 | ||
2740 | if (nfields != 4 || rcmd != cmd) | |
cdefc55d KB |
2741 | mips_error (_("mips_common_breakpoint: " |
2742 | "Bad response from remote board: %s"), | |
c906108c SS |
2743 | buf); |
2744 | ||
2745 | if (rerrflg != 0) | |
2746 | { | |
2747 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2748 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2749 | if (mips_monitor == MON_DDB) | |
2750 | rresponse = rerrflg; | |
c5aa993b | 2751 | if (rresponse != 22) /* invalid argument */ |
06b1d59c | 2752 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2753 | mips_common_breakpoint (%s): Got error: 0x%x\n", |
f5656ead | 2754 | paddress (target_gdbarch (), addr), rresponse); |
c906108c SS |
2755 | return 1; |
2756 | } | |
2757 | } | |
2758 | return 0; | |
2759 | } | |
2760 | \f | |
477c84a7 KB |
2761 | /* Send one S record as specified by SREC of length LEN, starting |
2762 | at ADDR. Note, however, that ADDR is not used except to provide | |
2763 | a useful message to the user in the event that a NACK is received | |
2764 | from the board. */ | |
2765 | ||
c906108c | 2766 | static void |
fba45db2 | 2767 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2768 | { |
2769 | while (1) | |
2770 | { | |
2771 | int ch; | |
2772 | ||
2cd58942 | 2773 | serial_write (mips_desc, srec, len); |
c906108c | 2774 | |
688991e6 | 2775 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2776 | |
2777 | switch (ch) | |
2778 | { | |
2779 | case SERIAL_TIMEOUT: | |
9b20d036 | 2780 | error (_("Timeout during download.")); |
c906108c SS |
2781 | break; |
2782 | case 0x6: /* ACK */ | |
2783 | return; | |
2784 | case 0x15: /* NACK */ | |
0df8b418 MS |
2785 | fprintf_unfiltered (gdb_stderr, |
2786 | "Download got a NACK at byte %s! Retrying.\n", | |
f5656ead | 2787 | paddress (target_gdbarch (), addr)); |
c906108c SS |
2788 | continue; |
2789 | default: | |
cdefc55d | 2790 | error (_("Download got unexpected ack char: 0x%x, retrying."), |
9b20d036 | 2791 | ch); |
c906108c SS |
2792 | } |
2793 | } | |
2794 | } | |
2795 | ||
0df8b418 | 2796 | /* Download a binary file by converting it to S records. */ |
c906108c SS |
2797 | |
2798 | static void | |
9cbe5fff | 2799 | mips_load_srec (const char *args) |
c906108c SS |
2800 | { |
2801 | bfd *abfd; | |
2802 | asection *s; | |
ce6ec7d8 PA |
2803 | char srec[1024]; |
2804 | bfd_byte *buffer; | |
c906108c SS |
2805 | unsigned int i; |
2806 | unsigned int srec_frame = 200; | |
2807 | int reclen; | |
d6ad71ba | 2808 | struct cleanup *cleanup; |
c906108c SS |
2809 | static int hashmark = 1; |
2810 | ||
2811 | buffer = alloca (srec_frame * 2 + 256); | |
2812 | ||
1c00ec6b | 2813 | abfd = gdb_bfd_open (args, NULL, -1); |
c906108c SS |
2814 | if (!abfd) |
2815 | { | |
2816 | printf_filtered ("Unable to open file %s\n", args); | |
2817 | return; | |
2818 | } | |
2819 | ||
f9a062ff | 2820 | cleanup = make_cleanup_bfd_unref (abfd); |
c906108c SS |
2821 | if (bfd_check_format (abfd, bfd_object) == 0) |
2822 | { | |
2823 | printf_filtered ("File is not an object file\n"); | |
d6ad71ba | 2824 | do_cleanups (cleanup); |
c906108c SS |
2825 | return; |
2826 | } | |
2827 | ||
2828 | /* This actually causes a download in the IDT binary format: */ | |
2829 | mips_send_command (LOAD_CMD, 0); | |
2830 | ||
2831 | for (s = abfd->sections; s; s = s->next) | |
2832 | { | |
2833 | if (s->flags & SEC_LOAD) | |
2834 | { | |
2835 | unsigned int numbytes; | |
2836 | ||
0df8b418 | 2837 | /* FIXME! vma too small????? */ |
d4f3574e SS |
2838 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, |
2839 | (long) s->vma, | |
2c500098 | 2840 | (long) (s->vma + bfd_get_section_size (s))); |
c906108c SS |
2841 | gdb_flush (gdb_stdout); |
2842 | ||
2c500098 | 2843 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
c906108c | 2844 | { |
2c500098 | 2845 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
c906108c SS |
2846 | |
2847 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2848 | ||
1fa79fac MS |
2849 | reclen = mips_make_srec (srec, '3', s->vma + i, |
2850 | buffer, numbytes); | |
c906108c SS |
2851 | send_srec (srec, reclen, s->vma + i); |
2852 | ||
9a4105ab AC |
2853 | if (deprecated_ui_load_progress_hook) |
2854 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 2855 | |
c906108c SS |
2856 | if (hashmark) |
2857 | { | |
2858 | putchar_unfiltered ('#'); | |
2859 | gdb_flush (gdb_stdout); | |
2860 | } | |
2861 | ||
c5aa993b JM |
2862 | } /* Per-packet (or S-record) loop */ |
2863 | ||
c906108c | 2864 | putchar_unfiltered ('\n'); |
c5aa993b | 2865 | } /* Loadable sections */ |
c906108c | 2866 | } |
c5aa993b | 2867 | if (hashmark) |
c906108c | 2868 | putchar_unfiltered ('\n'); |
c5aa993b | 2869 | |
c906108c SS |
2870 | /* Write a type 7 terminator record. no data for a type 7, and there |
2871 | is no data, so len is 0. */ | |
2872 | ||
2873 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2874 | ||
2875 | send_srec (srec, reclen, abfd->start_address); | |
2876 | ||
2cd58942 | 2877 | serial_flush_input (mips_desc); |
d6ad71ba | 2878 | do_cleanups (cleanup); |
c906108c SS |
2879 | } |
2880 | ||
2881 | /* | |
0df8b418 | 2882 | * mips_make_srec -- make an srecord. This writes each line, one at a |
c5aa993b JM |
2883 | * time, each with it's own header and trailer line. |
2884 | * An srecord looks like this: | |
c906108c SS |
2885 | * |
2886 | * byte count-+ address | |
2887 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2888 | * | | | | |
2889 | * S01000006F6B692D746573742E73726563E4 | |
2890 | * S315000448600000000000000000FC00005900000000E9 | |
2891 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2892 | * S30B0004485A0000000000004E | |
2893 | * S70500040000F6 | |
c906108c | 2894 | * |
c5aa993b | 2895 | * S<type><length><address><data><checksum> |
c906108c SS |
2896 | * |
2897 | * Where | |
2898 | * - length | |
0df8b418 | 2899 | * is the number of bytes following upto the checksum. Note that |
c906108c SS |
2900 | * this is not the number of chars following, since it takes two |
2901 | * chars to represent a byte. | |
2902 | * - type | |
2903 | * is one of: | |
2904 | * 0) header record | |
2905 | * 1) two byte address data record | |
2906 | * 2) three byte address data record | |
2907 | * 3) four byte address data record | |
2908 | * 7) four byte address termination record | |
2909 | * 8) three byte address termination record | |
2910 | * 9) two byte address termination record | |
2911 | * | |
2912 | * - address | |
2913 | * is the start address of the data following, or in the case of | |
2914 | * a termination record, the start address of the image | |
2915 | * - data | |
2916 | * is the data. | |
2917 | * - checksum | |
c5aa993b | 2918 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2919 | * upwards, modulo 256 and subtracted from 255. |
2920 | * | |
2921 | * This routine returns the length of the S-record. | |
2922 | * | |
2923 | */ | |
2924 | ||
2925 | static int | |
fba45db2 KB |
2926 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2927 | int len) | |
c906108c SS |
2928 | { |
2929 | unsigned char checksum; | |
2930 | int i; | |
2931 | ||
0df8b418 MS |
2932 | /* Create the header for the srec. addr_size is the number of bytes |
2933 | in the address, and 1 is the number of bytes in the count. */ | |
c906108c | 2934 | |
0df8b418 | 2935 | /* FIXME!! bigger buf required for 64-bit! */ |
c906108c SS |
2936 | buf[0] = 'S'; |
2937 | buf[1] = type; | |
2938 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
0df8b418 | 2939 | /* This assumes S3 style downloads (4byte addresses). There should |
c906108c | 2940 | probably be a check, or the code changed to make it more |
0df8b418 | 2941 | explicit. */ |
c906108c SS |
2942 | buf[3] = memaddr >> 24; |
2943 | buf[4] = memaddr >> 16; | |
2944 | buf[5] = memaddr >> 8; | |
2945 | buf[6] = memaddr; | |
2946 | memcpy (&buf[7], myaddr, len); | |
2947 | ||
2948 | /* Note that the checksum is calculated on the raw data, not the | |
2949 | hexified data. It includes the length, address and the data | |
2950 | portions of the packet. */ | |
2951 | checksum = 0; | |
0df8b418 | 2952 | buf += 2; /* Point at length byte. */ |
c906108c SS |
2953 | for (i = 0; i < len + 4 + 1; i++) |
2954 | checksum += *buf++; | |
2955 | ||
2956 | *buf = ~checksum; | |
2957 | ||
2958 | return len + 8; | |
2959 | } | |
2960 | ||
2961 | /* The following manifest controls whether we enable the simple flow | |
0df8b418 MS |
2962 | control support provided by the monitor. If enabled the code will |
2963 | wait for an affirmative ACK between transmitting packets. */ | |
c906108c SS |
2964 | #define DOETXACK (1) |
2965 | ||
2966 | /* The PMON fast-download uses an encoded packet format constructed of | |
2967 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2968 | escape sequences (preceded by a '/'): | |
2969 | ||
c5aa993b JM |
2970 | 'K' clear checksum |
2971 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
0df8b418 MS |
2972 | 'S' define symbol name (for addr) terminated with "," |
2973 | and padded to 4char boundary | |
c5aa993b JM |
2974 | 'Z' zero fill multiple of 3bytes |
2975 | 'B' byte (12bit encoded value, of 8bit data) | |
2976 | 'A' address (36bit encoded value) | |
2977 | 'E' define entry as original address, and exit load | |
c906108c SS |
2978 | |
2979 | The packets are processed in 4 character chunks, so the escape | |
2980 | sequences that do not have any data (or variable length data) | |
2981 | should be padded to a 4 character boundary. The decoder will give | |
2982 | an error if the complete message block size is not a multiple of | |
2983 | 4bytes (size of record). | |
2984 | ||
2985 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2986 | used to index into this string to get the specific character | |
2987 | encoding for the value: */ | |
0df8b418 MS |
2988 | static char encoding[] = |
2989 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
c906108c SS |
2990 | |
2991 | /* Convert the number of bits required into an encoded number, 6bits | |
2992 | at a time (range 0..63). Keep a checksum if required (passed | |
0df8b418 MS |
2993 | pointer non-NULL). The function returns the number of encoded |
2994 | characters written into the buffer. */ | |
477c84a7 | 2995 | |
c906108c | 2996 | static int |
ce6ec7d8 | 2997 | pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum) |
c906108c SS |
2998 | { |
2999 | int count = (n / 6); | |
3000 | ||
c5aa993b JM |
3001 | if ((n % 12) != 0) |
3002 | { | |
3003 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
3004 | "Fast encoding bitcount must be a " |
3005 | "multiple of 12bits: %dbit%s\n", | |
3006 | n, (n == 1) ? "" : "s"); | |
c5aa993b JM |
3007 | return (0); |
3008 | } | |
3009 | if (n > 36) | |
3010 | { | |
3011 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
3012 | "Fast encoding cannot process more " |
3013 | "than 36bits at the moment: %dbits\n", n); | |
c5aa993b JM |
3014 | return (0); |
3015 | } | |
c906108c SS |
3016 | |
3017 | /* Deal with the checksum: */ | |
c5aa993b JM |
3018 | if (chksum != NULL) |
3019 | { | |
3020 | switch (n) | |
3021 | { | |
3022 | case 36: | |
3023 | *chksum += ((v >> 24) & 0xFFF); | |
3024 | case 24: | |
3025 | *chksum += ((v >> 12) & 0xFFF); | |
3026 | case 12: | |
3027 | *chksum += ((v >> 0) & 0xFFF); | |
3028 | } | |
c906108c | 3029 | } |
c906108c | 3030 | |
c5aa993b JM |
3031 | do |
3032 | { | |
3033 | n -= 6; | |
3034 | *p++ = encoding[(v >> n) & 0x3F]; | |
3035 | } | |
3036 | while (n > 0); | |
c906108c | 3037 | |
c5aa993b | 3038 | return (count); |
c906108c SS |
3039 | } |
3040 | ||
3041 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
0df8b418 | 3042 | escape sequence into the data stream. */ |
477c84a7 | 3043 | |
c906108c | 3044 | static int |
ce6ec7d8 PA |
3045 | pmon_zeroset (int recsize, char **buff, |
3046 | unsigned int *amount, unsigned int *chksum) | |
c906108c SS |
3047 | { |
3048 | int count; | |
3049 | ||
c5aa993b | 3050 | sprintf (*buff, "/Z"); |
c906108c SS |
3051 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
3052 | *buff += (count + 2); | |
3053 | *amount = 0; | |
c5aa993b | 3054 | return (recsize + count + 2); |
c906108c SS |
3055 | } |
3056 | ||
477c84a7 KB |
3057 | /* Add the checksum specified by *VALUE to end of the record under |
3058 | construction. *BUF specifies the location at which to begin | |
3059 | writing characters comprising the checksum information. RECSIZE | |
3060 | specifies the size of the record constructed thus far. (A trailing | |
3061 | NUL character may be present in the buffer holding the record, but | |
3062 | the record size does not include this character.) | |
3063 | ||
3064 | Return the total size of the record after adding the checksum escape, | |
3065 | the checksum itself, and the trailing newline. | |
3066 | ||
0df8b418 | 3067 | The checksum specified by *VALUE is zeroed out prior to returning. |
477c84a7 KB |
3068 | Additionally, *BUF is updated to refer to the location just beyond |
3069 | the record elements added by this call. */ | |
3070 | ||
c906108c | 3071 | static int |
ce6ec7d8 | 3072 | pmon_checkset (int recsize, char **buff, unsigned int *value) |
c906108c SS |
3073 | { |
3074 | int count; | |
3075 | ||
3076 | /* Add the checksum (without updating the value): */ | |
3077 | sprintf (*buff, "/C"); | |
3078 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
3079 | *buff += (count + 2); | |
3080 | sprintf (*buff, "\n"); | |
0df8b418 | 3081 | *buff += 2; /* Include zero terminator. */ |
c906108c SS |
3082 | /* Forcing a checksum validation clears the sum: */ |
3083 | *value = 0; | |
c5aa993b | 3084 | return (recsize + count + 3); |
c906108c SS |
3085 | } |
3086 | ||
3087 | /* Amount of padding we leave after at the end of the output buffer, | |
3088 | for the checksum and line termination characters: */ | |
3089 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
0df8b418 | 3090 | /* zero-fill, checksum, transfer end and line termination space. */ |
c906108c SS |
3091 | |
3092 | /* The amount of binary data loaded from the object file in a single | |
3093 | operation: */ | |
3094 | #define BINCHUNK (1024) | |
3095 | ||
3096 | /* Maximum line of data accepted by the monitor: */ | |
3097 | #define MAXRECSIZE (550) | |
0df8b418 MS |
3098 | /* NOTE: This constant depends on the monitor being used. This value |
3099 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
c906108c | 3100 | |
477c84a7 KB |
3101 | /* Create a FastLoad format record. |
3102 | ||
3103 | *OUTBUF is the buffer into which a FastLoad formatted record is | |
3104 | written. On return, the pointer position represented by *OUTBUF | |
3105 | is updated to point at the end of the data, i.e. the next position | |
3106 | in the buffer that may be written. No attempt is made to NUL- | |
3107 | terminate this portion of the record written to the buffer. | |
3108 | ||
3109 | INBUF contains the binary input data from which the FastLoad | |
3110 | formatted record will be built. *INPTR is an index into this | |
3111 | buffer. *INPTR is updated as the input is consumed. Thus, on | |
3112 | return, the caller has access to the position of the next input | |
3113 | byte yet to be processed. INAMOUNT is the size, in bytes, of the | |
3114 | input data. | |
3115 | ||
3116 | *RECSIZE will be written with the size of the record written to the | |
3117 | output buffer prior to returning. This size does not include a | |
3118 | NUL-termination byte as none is written to the output buffer. | |
3119 | ||
3120 | *CSUM is the output buffer checksum. It is updated as data is | |
3121 | written to the output buffer. | |
3122 | ||
3123 | *ZEROFILL is the current number of 3-byte zero sequences that have | |
3124 | been encountered. It is both an input and an output to this | |
3125 | function. */ | |
3126 | ||
c906108c | 3127 | static void |
fba45db2 KB |
3128 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
3129 | int inamount, int *recsize, unsigned int *csum, | |
3130 | unsigned int *zerofill) | |
c906108c SS |
3131 | { |
3132 | int count = 0; | |
3133 | char *p = *outbuf; | |
3134 | ||
3135 | /* This is a simple check to ensure that our data will fit within | |
0df8b418 MS |
3136 | the maximum allowable record size. Each record output is 4bytes |
3137 | in length. We must allow space for a pending zero fill command, | |
3138 | the record, and a checksum record. */ | |
c5aa993b JM |
3139 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
3140 | { | |
3141 | /* Process the binary data: */ | |
3142 | if ((inamount - *inptr) < 3) | |
3143 | { | |
3144 | if (*zerofill != 0) | |
3145 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3146 | sprintf (p, "/B"); | |
3147 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
3148 | p += (2 + count); | |
3149 | *recsize += (2 + count); | |
3150 | (*inptr)++; | |
3151 | } | |
3152 | else | |
3153 | { | |
0df8b418 MS |
3154 | unsigned int value = ((inbuf[*inptr + 0] << 16) |
3155 | | (inbuf[*inptr + 1] << 8) | |
3156 | | (inbuf[*inptr + 2])); | |
123f5f96 | 3157 | |
0df8b418 | 3158 | /* Simple check for zero data. TODO: A better check would be |
c5aa993b | 3159 | to check the last, and then the middle byte for being zero |
0df8b418 | 3160 | (if the first byte is not). We could then check for |
c5aa993b JM |
3161 | following runs of zeros, and if above a certain size it is |
3162 | worth the 4 or 8 character hit of the byte insertions used | |
0df8b418 MS |
3163 | to pad to the start of the zeroes. NOTE: This also depends |
3164 | on the alignment at the end of the zero run. */ | |
c5aa993b JM |
3165 | if (value == 0x00000000) |
3166 | { | |
3167 | (*zerofill)++; | |
3168 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
3169 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3170 | } | |
3171 | else | |
3172 | { | |
3173 | if (*zerofill != 0) | |
3174 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3175 | count = pmon_makeb64 (value, p, 24, csum); | |
3176 | p += count; | |
3177 | *recsize += count; | |
3178 | } | |
3179 | *inptr += 3; | |
3180 | } | |
c906108c | 3181 | } |
c906108c SS |
3182 | |
3183 | *outbuf = p; | |
3184 | return; | |
3185 | } | |
3186 | ||
477c84a7 KB |
3187 | /* Attempt to read an ACK. If an ACK is not read in a timely manner, |
3188 | output the message specified by MESG. Return -1 for failure, 0 | |
3189 | for success. */ | |
3190 | ||
c906108c | 3191 | static int |
fba45db2 | 3192 | pmon_check_ack (char *mesg) |
c906108c SS |
3193 | { |
3194 | #if defined(DOETXACK) | |
3195 | int c; | |
3196 | ||
3197 | if (!tftp_in_use) | |
3198 | { | |
2cd58942 | 3199 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 3200 | remote_timeout); |
c906108c SS |
3201 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
3202 | { | |
3203 | fprintf_unfiltered (gdb_stderr, | |
3204 | "Failed to receive valid ACK for %s\n", mesg); | |
0df8b418 | 3205 | return (-1); /* Terminate the download. */ |
c906108c SS |
3206 | } |
3207 | } | |
3208 | #endif /* DOETXACK */ | |
c5aa993b | 3209 | return (0); |
c906108c SS |
3210 | } |
3211 | ||
3212 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
3213 | which is either a serial port or a UDP socket. */ | |
3214 | ||
3215 | static void | |
fba45db2 | 3216 | pmon_start_download (void) |
c906108c SS |
3217 | { |
3218 | if (tftp_in_use) | |
3219 | { | |
3220 | /* Create the temporary download file. */ | |
3221 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
3222 | perror_with_name (tftp_localname); | |
3223 | } | |
3224 | else | |
3225 | { | |
3226 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3227 | mips_expect ("Downloading from "); | |
3228 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3229 | mips_expect (", ^C to abort\r\n"); | |
3230 | } | |
3231 | } | |
3232 | ||
477c84a7 KB |
3233 | /* Look for the string specified by STRING sent from the target board |
3234 | during a download operation. If the string in question is not | |
3235 | seen, output an error message, remove the temporary file, if | |
3236 | appropriate, and return 0. Otherwise, return 1 to indicate | |
3237 | success. */ | |
3238 | ||
c906108c SS |
3239 | static int |
3240 | mips_expect_download (char *string) | |
3241 | { | |
3242 | if (!mips_expect (string)) | |
3243 | { | |
3244 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3245 | if (tftp_in_use) | |
0df8b418 | 3246 | remove (tftp_localname); /* Remove temporary file. */ |
c906108c SS |
3247 | return 0; |
3248 | } | |
3249 | else | |
3250 | return 1; | |
3251 | } | |
3252 | ||
477c84a7 KB |
3253 | /* Look for messages from the target board associated with the entry |
3254 | address. | |
3255 | ||
3256 | NOTE: This function doesn't indicate success or failure, so we | |
3257 | have no way to determine whether or not the output from the board | |
3258 | was correctly seen. However, given that other items are checked | |
3259 | after this, it seems unlikely that those checks will pass if this | |
3260 | check doesn't first (silently) pass. */ | |
3261 | ||
688991e6 AC |
3262 | static void |
3263 | pmon_check_entry_address (char *entry_address, int final) | |
3264 | { | |
0df8b418 | 3265 | char hexnumber[9]; /* Includes '\0' space. */ |
123f5f96 | 3266 | |
688991e6 AC |
3267 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); |
3268 | sprintf (hexnumber, "%x", final); | |
3269 | mips_expect (hexnumber); | |
3270 | mips_expect ("\r\n"); | |
3271 | } | |
3272 | ||
477c84a7 KB |
3273 | /* Look for messages from the target board showing the total number of |
3274 | bytes downloaded to the board. Output 1 for success if the tail | |
3275 | end of the message was read correctly, 0 otherwise. */ | |
3276 | ||
688991e6 AC |
3277 | static int |
3278 | pmon_check_total (int bintotal) | |
3279 | { | |
0df8b418 | 3280 | char hexnumber[9]; /* Includes '\0' space. */ |
123f5f96 | 3281 | |
688991e6 AC |
3282 | mips_expect ("\r\ntotal = 0x"); |
3283 | sprintf (hexnumber, "%x", bintotal); | |
3284 | mips_expect (hexnumber); | |
3285 | return mips_expect_download (" bytes\r\n"); | |
3286 | } | |
3287 | ||
477c84a7 KB |
3288 | /* Look for the termination messages associated with the end of |
3289 | a download to the board. | |
3290 | ||
3291 | Also, when `tftp_in_use' is set, issue the load command to the | |
3292 | board causing the file to be transferred. (This is done prior | |
3293 | to looking for the above mentioned termination messages.) */ | |
3294 | ||
c906108c | 3295 | static void |
fba45db2 | 3296 | pmon_end_download (int final, int bintotal) |
c906108c | 3297 | { |
0df8b418 | 3298 | char hexnumber[9]; /* Includes '\0' space. */ |
c906108c SS |
3299 | |
3300 | if (tftp_in_use) | |
3301 | { | |
3302 | static char *load_cmd_prefix = "load -b -s "; | |
3303 | char *cmd; | |
3304 | struct stat stbuf; | |
3305 | ||
3306 | /* Close off the temporary file containing the load data. */ | |
3307 | fclose (tftp_file); | |
3308 | tftp_file = NULL; | |
3309 | ||
3310 | /* Make the temporary file readable by the world. */ | |
3311 | if (stat (tftp_localname, &stbuf) == 0) | |
3312 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3313 | ||
3314 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
bbd2783e KB |
3315 | if (mips_monitor != MON_ROCKHOPPER) |
3316 | mips_send_command ("initEther\r", -1); | |
c906108c SS |
3317 | |
3318 | /* Send the load command. */ | |
3319 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3320 | strcpy (cmd, load_cmd_prefix); | |
3321 | strcat (cmd, tftp_name); | |
3322 | strcat (cmd, "\r"); | |
3323 | mips_send_command (cmd, 0); | |
b8c9b27d | 3324 | xfree (cmd); |
c906108c SS |
3325 | if (!mips_expect_download ("Downloading from ")) |
3326 | return; | |
3327 | if (!mips_expect_download (tftp_name)) | |
3328 | return; | |
3329 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3330 | return; | |
3331 | } | |
3332 | ||
3333 | /* Wait for the stuff that PMON prints after the load has completed. | |
3334 | The timeout value for use in the tftp case (15 seconds) was picked | |
0df8b418 | 3335 | arbitrarily but might be too small for really large downloads. FIXME. */ |
688991e6 | 3336 | switch (mips_monitor) |
c906108c | 3337 | { |
688991e6 AC |
3338 | case MON_LSI: |
3339 | pmon_check_ack ("termination"); | |
3340 | pmon_check_entry_address ("Entry address is ", final); | |
3341 | if (!pmon_check_total (bintotal)) | |
3342 | return; | |
3343 | break; | |
bbd2783e KB |
3344 | case MON_ROCKHOPPER: |
3345 | if (!pmon_check_total (bintotal)) | |
3346 | return; | |
3347 | pmon_check_entry_address ("Entry Address = ", final); | |
3348 | break; | |
688991e6 AC |
3349 | default: |
3350 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3351 | pmon_check_ack ("termination"); |
688991e6 AC |
3352 | if (!pmon_check_total (bintotal)) |
3353 | return; | |
3354 | break; | |
c906108c | 3355 | } |
c906108c SS |
3356 | |
3357 | if (tftp_in_use) | |
0df8b418 | 3358 | remove (tftp_localname); /* Remove temporary file. */ |
c906108c SS |
3359 | } |
3360 | ||
477c84a7 KB |
3361 | /* Write the buffer specified by BUFFER of length LENGTH to either |
3362 | the board or the temporary file that'll eventually be transferred | |
3363 | to the board. */ | |
3364 | ||
c906108c | 3365 | static void |
fba45db2 | 3366 | pmon_download (char *buffer, int length) |
c906108c SS |
3367 | { |
3368 | if (tftp_in_use) | |
2e424e08 JK |
3369 | { |
3370 | size_t written; | |
3371 | ||
3372 | written = fwrite (buffer, 1, length, tftp_file); | |
3373 | if (written < length) | |
3374 | perror_with_name (tftp_localname); | |
3375 | } | |
c906108c | 3376 | else |
2cd58942 | 3377 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3378 | } |
3379 | ||
477c84a7 KB |
3380 | /* Open object or executable file, FILE, and send it to the board |
3381 | using the FastLoad format. */ | |
3382 | ||
c906108c | 3383 | static void |
9cbe5fff | 3384 | pmon_load_fast (const char *file) |
c906108c SS |
3385 | { |
3386 | bfd *abfd; | |
3387 | asection *s; | |
3388 | unsigned char *binbuf; | |
3389 | char *buffer; | |
3390 | int reclen; | |
3391 | unsigned int csum = 0; | |
3392 | int hashmark = !tftp_in_use; | |
3393 | int bintotal = 0; | |
3394 | int final = 0; | |
3395 | int finished = 0; | |
d6ad71ba | 3396 | struct cleanup *cleanup; |
c906108c | 3397 | |
c5aa993b JM |
3398 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3399 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3400 | |
1c00ec6b | 3401 | abfd = gdb_bfd_open (file, NULL, -1); |
c906108c | 3402 | if (!abfd) |
c5aa993b JM |
3403 | { |
3404 | printf_filtered ("Unable to open file %s\n", file); | |
3405 | return; | |
3406 | } | |
f9a062ff | 3407 | cleanup = make_cleanup_bfd_unref (abfd); |
c906108c | 3408 | |
c5aa993b JM |
3409 | if (bfd_check_format (abfd, bfd_object) == 0) |
3410 | { | |
3411 | printf_filtered ("File is not an object file\n"); | |
d6ad71ba | 3412 | do_cleanups (cleanup); |
c5aa993b JM |
3413 | return; |
3414 | } | |
c906108c SS |
3415 | |
3416 | /* Setup the required download state: */ | |
3417 | mips_send_command ("set dlproto etxack\r", -1); | |
3418 | mips_send_command ("set dlecho off\r", -1); | |
3419 | /* NOTE: We get a "cannot set variable" message if the variable is | |
0df8b418 MS |
3420 | already defined to have the argument we give. The code doesn't |
3421 | care, since it just scans to the next prompt anyway. */ | |
c906108c | 3422 | /* Start the download: */ |
c5aa993b JM |
3423 | pmon_start_download (); |
3424 | ||
0df8b418 | 3425 | /* Zero the checksum. */ |
c5aa993b JM |
3426 | sprintf (buffer, "/Kxx\n"); |
3427 | reclen = strlen (buffer); | |
c906108c | 3428 | pmon_download (buffer, reclen); |
c5aa993b | 3429 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3430 | |
3431 | for (s = abfd->sections; s && !finished; s = s->next) | |
0df8b418 | 3432 | if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */ |
c5aa993b | 3433 | { |
2c500098 AM |
3434 | bintotal += bfd_get_section_size (s); |
3435 | final = (s->vma + bfd_get_section_size (s)); | |
c5aa993b | 3436 | |
0df8b418 MS |
3437 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, |
3438 | (unsigned int) s->vma, | |
2c500098 | 3439 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
c5aa993b JM |
3440 | gdb_flush (gdb_stdout); |
3441 | ||
0df8b418 | 3442 | /* Output the starting address. */ |
c5aa993b JM |
3443 | sprintf (buffer, "/A"); |
3444 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3445 | buffer[2 + reclen] = '\n'; | |
3446 | buffer[3 + reclen] = '\0'; | |
0df8b418 | 3447 | reclen += 3; /* For the initial escape code and carriage return. */ |
c5aa993b JM |
3448 | pmon_download (buffer, reclen); |
3449 | finished = pmon_check_ack ("/A"); | |
3450 | ||
3451 | if (!finished) | |
3452 | { | |
3453 | unsigned int binamount; | |
3454 | unsigned int zerofill = 0; | |
3455 | char *bp = buffer; | |
3456 | unsigned int i; | |
3457 | ||
3458 | reclen = 0; | |
3459 | ||
2c500098 AM |
3460 | for (i = 0; |
3461 | i < bfd_get_section_size (s) && !finished; | |
3462 | i += binamount) | |
c5aa993b JM |
3463 | { |
3464 | int binptr = 0; | |
3465 | ||
2c500098 | 3466 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
c5aa993b JM |
3467 | |
3468 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3469 | ||
3470 | /* This keeps a rolling checksum, until we decide to output | |
3471 | the line: */ | |
3472 | for (; ((binamount - binptr) > 0);) | |
3473 | { | |
1fa79fac MS |
3474 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
3475 | &reclen, &csum, &zerofill); | |
c5aa993b JM |
3476 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
3477 | { | |
3478 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3479 | pmon_download (buffer, reclen); | |
3480 | finished = pmon_check_ack ("data record"); | |
3481 | if (finished) | |
3482 | { | |
0df8b418 MS |
3483 | zerofill = 0; /* Do not transmit pending |
3484 | zerofills. */ | |
c5aa993b JM |
3485 | break; |
3486 | } | |
3487 | ||
9a4105ab AC |
3488 | if (deprecated_ui_load_progress_hook) |
3489 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 3490 | |
c5aa993b JM |
3491 | if (hashmark) |
3492 | { | |
3493 | putchar_unfiltered ('#'); | |
3494 | gdb_flush (gdb_stdout); | |
3495 | } | |
3496 | ||
3497 | bp = buffer; | |
3498 | reclen = 0; /* buffer processed */ | |
3499 | } | |
3500 | } | |
3501 | } | |
3502 | ||
3503 | /* Ensure no out-standing zerofill requests: */ | |
3504 | if (zerofill != 0) | |
3505 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3506 | ||
3507 | /* and then flush the line: */ | |
3508 | if (reclen > 0) | |
3509 | { | |
3510 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3511 | /* Currently pmon_checkset outputs the line terminator by | |
3512 | default, so we write out the buffer so far: */ | |
3513 | pmon_download (buffer, reclen); | |
3514 | finished = pmon_check_ack ("record remnant"); | |
3515 | } | |
3516 | } | |
3517 | ||
3518 | putchar_unfiltered ('\n'); | |
3519 | } | |
c906108c | 3520 | |
0df8b418 MS |
3521 | /* Terminate the transfer. We know that we have an empty output |
3522 | buffer at this point. */ | |
3523 | sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */ | |
c906108c SS |
3524 | reclen = strlen (buffer); |
3525 | pmon_download (buffer, reclen); | |
3526 | ||
c5aa993b JM |
3527 | if (finished) |
3528 | { /* Ignore the termination message: */ | |
2cd58942 | 3529 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3530 | } |
3531 | else | |
3532 | { /* Deal with termination message: */ | |
3533 | pmon_end_download (final, bintotal); | |
3534 | } | |
c906108c | 3535 | |
d6ad71ba | 3536 | do_cleanups (cleanup); |
c906108c SS |
3537 | return; |
3538 | } | |
3539 | ||
0df8b418 | 3540 | /* mips_load -- download a file. */ |
c906108c SS |
3541 | |
3542 | static void | |
9cbe5fff | 3543 | mips_load (struct target_ops *self, const char *file, int from_tty) |
c906108c | 3544 | { |
fb14de7b UW |
3545 | struct regcache *regcache; |
3546 | ||
c906108c SS |
3547 | /* Get the board out of remote debugging mode. */ |
3548 | if (mips_exit_debug ()) | |
9b20d036 | 3549 | error (_("mips_load: Couldn't get into monitor mode.")); |
c906108c SS |
3550 | |
3551 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3552 | pmon_load_fast (file); |
c906108c | 3553 | else |
c5aa993b | 3554 | mips_load_srec (file); |
c906108c SS |
3555 | |
3556 | mips_initialize (); | |
3557 | ||
0df8b418 | 3558 | /* Finally, make the PC point at the start address. */ |
fb14de7b | 3559 | regcache = get_current_regcache (); |
c906108c SS |
3560 | if (mips_monitor != MON_IDT) |
3561 | { | |
3562 | /* Work around problem where PMON monitor updates the PC after a load | |
0df8b418 | 3563 | to a different value than GDB thinks it has. The following ensures |
fb14de7b | 3564 | that the regcache_write_pc() WILL update the PC value: */ |
a624e111 | 3565 | regcache_invalidate (regcache, |
97b0f3e2 | 3566 | mips_regnum (get_regcache_arch (regcache))->pc); |
c906108c SS |
3567 | } |
3568 | if (exec_bfd) | |
fb14de7b | 3569 | regcache_write_pc (regcache, bfd_get_start_address (exec_bfd)); |
8eeafb51 | 3570 | } |
c906108c | 3571 | |
8eeafb51 KB |
3572 | /* Check to see if a thread is still alive. */ |
3573 | ||
3574 | static int | |
3575 | mips_thread_alive (struct target_ops *ops, ptid_t ptid) | |
3576 | { | |
3577 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3578 | /* The monitor's task is always alive. */ | |
3579 | return 1; | |
c906108c | 3580 | |
8eeafb51 | 3581 | return 0; |
c906108c SS |
3582 | } |
3583 | ||
8eeafb51 KB |
3584 | /* Convert a thread ID to a string. Returns the string in a static |
3585 | buffer. */ | |
3586 | ||
3587 | static char * | |
3588 | mips_pid_to_str (struct target_ops *ops, ptid_t ptid) | |
3589 | { | |
3590 | static char buf[64]; | |
3591 | ||
3592 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3593 | { | |
3594 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
3595 | return buf; | |
3596 | } | |
3597 | ||
3598 | return normal_pid_to_str (ptid); | |
3599 | } | |
c906108c SS |
3600 | |
3601 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3602 | ||
3603 | static void | |
fba45db2 | 3604 | pmon_command (char *args, int from_tty) |
c906108c SS |
3605 | { |
3606 | char buf[DATA_MAXLEN + 1]; | |
3607 | int rlen; | |
3608 | ||
3609 | sprintf (buf, "0x0 %s", args); | |
3610 | mips_send_packet (buf, 1); | |
3611 | printf_filtered ("Send packet: %s\n", buf); | |
3612 | ||
3613 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3614 | buf[rlen] = '\0'; | |
3615 | printf_filtered ("Received packet: %s\n", buf); | |
3616 | } | |
3617 | \f | |
0df8b418 MS |
3618 | /* -Wmissing-prototypes */ |
3619 | extern initialize_file_ftype _initialize_remote_mips; | |
a78f21af | 3620 | |
477c84a7 KB |
3621 | /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops. |
3622 | Create target specific commands and perform other initializations | |
3623 | specific to this file. */ | |
3624 | ||
c906108c | 3625 | void |
fba45db2 | 3626 | _initialize_remote_mips (void) |
c906108c SS |
3627 | { |
3628 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3629 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3630 | mips_ops.to_close = mips_close; | |
3631 | mips_ops.to_detach = mips_detach; | |
3632 | mips_ops.to_resume = mips_resume; | |
3633 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3634 | mips_ops.to_store_registers = mips_store_registers; | |
3635 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
6df1b29f | 3636 | mips_ops.to_xfer_partial = mips_xfer_partial; |
c906108c SS |
3637 | mips_ops.to_files_info = mips_files_info; |
3638 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3639 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3640 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3641 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3642 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3643 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3644 | mips_ops.to_kill = mips_kill; |
3645 | mips_ops.to_load = mips_load; | |
3646 | mips_ops.to_create_inferior = mips_create_inferior; | |
3647 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
8eeafb51 KB |
3648 | mips_ops.to_thread_alive = mips_thread_alive; |
3649 | mips_ops.to_pid_to_str = mips_pid_to_str; | |
49d03eab | 3650 | mips_ops.to_log_command = serial_log_command; |
c906108c | 3651 | mips_ops.to_stratum = process_stratum; |
c35b1492 PA |
3652 | mips_ops.to_has_all_memory = default_child_has_all_memory; |
3653 | mips_ops.to_has_memory = default_child_has_memory; | |
3654 | mips_ops.to_has_stack = default_child_has_stack; | |
3655 | mips_ops.to_has_registers = default_child_has_registers; | |
3656 | mips_ops.to_has_execution = default_child_has_execution; | |
c906108c SS |
3657 | mips_ops.to_magic = OPS_MAGIC; |
3658 | ||
3659 | /* Copy the common fields to all four target vectors. */ | |
bbd2783e | 3660 | rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops; |
c906108c SS |
3661 | |
3662 | /* Initialize target-specific fields in the target vectors. */ | |
3663 | mips_ops.to_shortname = "mips"; | |
3664 | mips_ops.to_doc = "\ | |
3665 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3666 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3667 | HOST:PORT to access a board over a network"; | |
3668 | mips_ops.to_open = mips_open; | |
3669 | mips_ops.to_wait = mips_wait; | |
3670 | ||
3671 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3672 | pmon_ops.to_doc = "\ |
c906108c SS |
3673 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3674 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3675 | colon, HOST:PORT to access a board over a network"; | |
3676 | pmon_ops.to_open = pmon_open; | |
3677 | pmon_ops.to_wait = mips_wait; | |
3678 | ||
3679 | ddb_ops.to_shortname = "ddb"; | |
3680 | ddb_ops.to_doc = "\ | |
3681 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3682 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3683 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3684 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3685 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3686 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3687 | ddb_ops.to_open = ddb_open; | |
3688 | ddb_ops.to_wait = mips_wait; | |
3689 | ||
bbd2783e KB |
3690 | rockhopper_ops.to_shortname = "rockhopper"; |
3691 | rockhopper_ops.to_doc = ddb_ops.to_doc; | |
3692 | rockhopper_ops.to_open = rockhopper_open; | |
3693 | rockhopper_ops.to_wait = mips_wait; | |
3694 | ||
c906108c SS |
3695 | lsi_ops.to_shortname = "lsi"; |
3696 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3697 | lsi_ops.to_open = lsi_open; | |
3698 | lsi_ops.to_wait = mips_wait; | |
3699 | ||
3700 | /* Add the targets. */ | |
3701 | add_target (&mips_ops); | |
3702 | add_target (&pmon_ops); | |
3703 | add_target (&ddb_ops); | |
3704 | add_target (&lsi_ops); | |
bbd2783e | 3705 | add_target (&rockhopper_ops); |
c906108c | 3706 | |
85c07804 AC |
3707 | add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ |
3708 | Set timeout in seconds for remote MIPS serial I/O."), _("\ | |
3709 | Show timeout in seconds for remote MIPS serial I/O."), NULL, | |
3710 | NULL, | |
3711 | NULL, /* FIXME: i18n: */ | |
3712 | &setlist, &showlist); | |
3713 | ||
3714 | add_setshow_zinteger_cmd ("retransmit-timeout", no_class, | |
3715 | &mips_retransmit_wait, _("\ | |
3716 | Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
3717 | Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
c906108c | 3718 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
85c07804 AC |
3719 | before resending the packet."), |
3720 | NULL, | |
3721 | NULL, /* FIXME: i18n: */ | |
3722 | &setlist, &showlist); | |
3723 | ||
3724 | add_setshow_zinteger_cmd ("syn-garbage-limit", no_class, | |
3725 | &mips_syn_garbage, _("\ | |
3726 | Set the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
3727 | Show the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
c906108c | 3728 | This is the maximum number of characters GDB will ignore when trying to\n\ |
cb1a6d5f AC |
3729 | synchronize with the remote system. A value of -1 means that there is no\n\ |
3730 | limit. (Note that these characters are printed out even though they are\n\ | |
85c07804 AC |
3731 | ignored.)"), |
3732 | NULL, | |
3733 | NULL, /* FIXME: i18n: */ | |
3734 | &setlist, &showlist); | |
c906108c | 3735 | |
4d28ad1e AC |
3736 | add_setshow_string_cmd ("monitor-prompt", class_obscure, |
3737 | &mips_monitor_prompt, _("\ | |
3738 | Set the prompt that GDB expects from the monitor."), _("\ | |
3739 | Show the prompt that GDB expects from the monitor."), NULL, | |
3740 | NULL, | |
3741 | NULL, /* FIXME: i18n: */ | |
3742 | &setlist, &showlist); | |
c906108c | 3743 | |
85c07804 AC |
3744 | add_setshow_zinteger_cmd ("monitor-warnings", class_obscure, |
3745 | &monitor_warnings, _("\ | |
3746 | Set printing of monitor warnings."), _("\ | |
3747 | Show printing of monitor warnings."), _("\ | |
3748 | When enabled, monitor warnings about hardware breakpoints will be displayed."), | |
3749 | NULL, | |
3750 | NULL, /* FIXME: i18n: */ | |
3751 | &setlist, &showlist); | |
c906108c | 3752 | |
24ec834b | 3753 | add_com ("pmon", class_obscure, pmon_command, |
1bedd215 | 3754 | _("Send a packet to PMON (must be in debug mode).")); |
4014092b | 3755 | |
5bf193a2 AC |
3756 | add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\ |
3757 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3758 | Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3759 | Use \"on\" to enable the masking and \"off\" to disable it."), | |
3760 | NULL, | |
3761 | NULL, /* FIXME: i18n: */ | |
3762 | &setlist, &showlist); | |
8eeafb51 | 3763 | remote_mips_ptid = ptid_build (42000, 0, 42000); |
c906108c | 3764 | } |