Commit | Line | Data |
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c906108c SS |
1 | /* Remote debugging interface for MIPS remote debugging protocol. |
2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Ian Lance Taylor | |
4 | <ian@cygnus.com>. | |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "wait.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "gdbcore.h" | |
30 | #include "serial.h" | |
31 | #include "target.h" | |
32 | #include "remote-utils.h" | |
33 | #include "gdb_string.h" | |
34 | ||
35 | #include <signal.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/stat.h> | |
38 | #ifdef ANSI_PROTOTYPES | |
39 | #include <stdarg.h> | |
40 | #else | |
41 | #include <varargs.h> | |
42 | #endif | |
43 | ||
44 | /* Microsoft C's stat.h doesn't define all the POSIX file modes. */ | |
45 | #ifndef S_IROTH | |
46 | #define S_IROTH S_IREAD | |
47 | #endif | |
48 | ||
49 | extern void mips_set_processor_type_command PARAMS ((char *, int)); | |
c906108c | 50 | \f |
c5aa993b | 51 | |
c906108c SS |
52 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
53 | types passed by breakpoint.c to target_insert_watchpoint. | |
54 | Value 3 is our own invention, and is used for ordinary instruction | |
55 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
56 | enum break_type |
57 | { | |
58 | BREAK_WRITE, /* 0 */ | |
59 | BREAK_READ, /* 1 */ | |
60 | BREAK_ACCESS, /* 2 */ | |
61 | BREAK_FETCH, /* 3 */ | |
62 | BREAK_UNUSED /* 4 */ | |
63 | }; | |
c906108c SS |
64 | |
65 | /* Prototypes for local functions. */ | |
66 | ||
67 | static int mips_readchar PARAMS ((int timeout)); | |
68 | ||
69 | static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, | |
70 | int ch, int timeout)); | |
71 | ||
72 | static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, | |
73 | int *pch, int timeout)); | |
74 | ||
75 | static int mips_cksum PARAMS ((const unsigned char *hdr, | |
76 | const unsigned char *data, | |
77 | int len)); | |
78 | ||
79 | static void mips_send_packet PARAMS ((const char *s, int get_ack)); | |
80 | ||
81 | static void mips_send_command PARAMS ((const char *cmd, int prompt)); | |
82 | ||
83 | static int mips_receive_packet PARAMS ((char *buff, int throw_error, | |
84 | int timeout)); | |
85 | ||
86 | static CORE_ADDR mips_request PARAMS ((int cmd, CORE_ADDR addr, | |
c5aa993b JM |
87 | CORE_ADDR data, int *perr, int timeout, |
88 | char *buff)); | |
c906108c SS |
89 | |
90 | static void mips_initialize PARAMS ((void)); | |
91 | ||
92 | static void mips_open PARAMS ((char *name, int from_tty)); | |
93 | ||
94 | static void pmon_open PARAMS ((char *name, int from_tty)); | |
95 | ||
96 | static void ddb_open PARAMS ((char *name, int from_tty)); | |
97 | ||
98 | static void lsi_open PARAMS ((char *name, int from_tty)); | |
99 | ||
100 | static void mips_close PARAMS ((int quitting)); | |
101 | ||
102 | static void mips_detach PARAMS ((char *args, int from_tty)); | |
103 | ||
104 | static void mips_resume PARAMS ((int pid, int step, | |
105 | enum target_signal siggnal)); | |
106 | ||
c5aa993b | 107 | static int mips_wait PARAMS ((int pid, struct target_waitstatus * status)); |
c906108c SS |
108 | |
109 | static int mips_map_regno PARAMS ((int regno)); | |
110 | ||
111 | static void mips_fetch_registers PARAMS ((int regno)); | |
112 | ||
113 | static void mips_prepare_to_store PARAMS ((void)); | |
114 | ||
115 | static void mips_store_registers PARAMS ((int regno)); | |
116 | ||
117 | static unsigned int mips_fetch_word PARAMS ((CORE_ADDR addr)); | |
118 | ||
119 | static int mips_store_word PARAMS ((CORE_ADDR addr, unsigned int value, | |
120 | char *old_contents)); | |
121 | ||
122 | static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, | |
c5aa993b | 123 | int write, struct target_ops * ignore)); |
c906108c | 124 | |
c5aa993b | 125 | static void mips_files_info PARAMS ((struct target_ops * ignore)); |
c906108c SS |
126 | |
127 | static void mips_create_inferior PARAMS ((char *execfile, char *args, | |
128 | char **env)); | |
129 | ||
130 | static void mips_mourn_inferior PARAMS ((void)); | |
131 | ||
132 | static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum)); | |
133 | ||
134 | static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount, | |
c5aa993b | 135 | unsigned int *chksum)); |
c906108c SS |
136 | |
137 | static int pmon_checkset PARAMS ((int recsize, char **buff, int *value)); | |
138 | ||
139 | static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf, | |
c5aa993b JM |
140 | int *inptr, int inamount, int *recsize, |
141 | unsigned int *csum, unsigned int *zerofill)); | |
c906108c SS |
142 | |
143 | static int pmon_check_ack PARAMS ((char *mesg)); | |
144 | ||
145 | static void pmon_start_download PARAMS ((void)); | |
146 | ||
147 | static void pmon_end_download PARAMS ((int final, int bintotal)); | |
148 | ||
149 | static void pmon_download PARAMS ((char *buffer, int length)); | |
150 | ||
151 | static void pmon_load_fast PARAMS ((char *file)); | |
152 | ||
153 | static void mips_load PARAMS ((char *file, int from_tty)); | |
154 | ||
155 | static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr, | |
156 | unsigned char *myaddr, int len)); | |
157 | ||
158 | static int set_breakpoint PARAMS ((CORE_ADDR addr, int len, | |
159 | enum break_type type)); | |
160 | ||
161 | static int clear_breakpoint PARAMS ((CORE_ADDR addr, int len, | |
162 | enum break_type type)); | |
163 | ||
164 | static int common_breakpoint PARAMS ((int set, CORE_ADDR addr, int len, | |
165 | enum break_type type)); | |
166 | ||
167 | /* Forward declarations. */ | |
168 | extern struct target_ops mips_ops; | |
169 | extern struct target_ops pmon_ops; | |
170 | extern struct target_ops ddb_ops; | |
c5aa993b | 171 | \f/* *INDENT-OFF* */ |
c906108c SS |
172 | /* The MIPS remote debugging interface is built on top of a simple |
173 | packet protocol. Each packet is organized as follows: | |
174 | ||
c5aa993b JM |
175 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
176 | may not appear anywhere else in the packet. Any time a SYN is | |
177 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
178 | |
179 | TYPE_LEN | |
c5aa993b JM |
180 | This byte contains the upper five bits of the logical length |
181 | of the data section, plus a single bit indicating whether this | |
182 | is a data packet or an acknowledgement. The documentation | |
183 | indicates that this bit is 1 for a data packet, but the actual | |
184 | board uses 1 for an acknowledgement. The value of the byte is | |
185 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
186 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
187 | not carry data, and must have a data length of 0. | |
c906108c SS |
188 | |
189 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
190 | the data section. The value is |
191 | 0x40 + (len & 0x3f) | |
192 | ||
193 | SEQ This byte contains the six bit sequence number of the packet. | |
194 | The value is | |
195 | 0x40 + seq | |
196 | An acknowlegment packet contains the sequence number of the | |
197 | packet being acknowledged plus 1 modulo 64. Data packets are | |
198 | transmitted in sequence. There may only be one outstanding | |
199 | unacknowledged data packet at a time. The sequence numbers | |
200 | are independent in each direction. If an acknowledgement for | |
201 | the previous packet is received (i.e., an acknowledgement with | |
202 | the sequence number of the packet just sent) the packet just | |
203 | sent should be retransmitted. If no acknowledgement is | |
204 | received within a timeout period, the packet should be | |
205 | retransmitted. This has an unfortunate failure condition on a | |
206 | high-latency line, as a delayed acknowledgement may lead to an | |
207 | endless series of duplicate packets. | |
208 | ||
209 | DATA The actual data bytes follow. The following characters are | |
210 | escaped inline with DLE (ASCII 020, or ^P): | |
211 | SYN (026) DLE S | |
212 | DLE (020) DLE D | |
213 | ^C (003) DLE C | |
214 | ^S (023) DLE s | |
215 | ^Q (021) DLE q | |
216 | The additional DLE characters are not counted in the logical | |
217 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
218 | |
219 | CSUM1 | |
220 | CSUM2 | |
221 | CSUM3 | |
c5aa993b JM |
222 | These bytes contain an 18 bit checksum of the complete |
223 | contents of the packet excluding the SEQ byte and the | |
224 | CSUM[123] bytes. The checksum is simply the twos complement | |
225 | addition of all the bytes treated as unsigned characters. The | |
226 | values of the checksum bytes are: | |
227 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
228 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
229 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
230 | |
231 | It happens that the MIPS remote debugging protocol always | |
232 | communicates with ASCII strings. Because of this, this | |
233 | implementation doesn't bother to handle the DLE quoting mechanism, | |
234 | since it will never be required. */ | |
9846de1b | 235 | /* *INDENT-ON* */ |
c906108c | 236 | |
c5aa993b | 237 | |
c906108c SS |
238 | /* The SYN character which starts each packet. */ |
239 | #define SYN '\026' | |
240 | ||
241 | /* The 0x40 used to offset each packet (this value ensures that all of | |
242 | the header and trailer bytes, other than SYN, are printable ASCII | |
243 | characters). */ | |
244 | #define HDR_OFFSET 0x40 | |
245 | ||
246 | /* The indices of the bytes in the packet header. */ | |
247 | #define HDR_INDX_SYN 0 | |
248 | #define HDR_INDX_TYPE_LEN 1 | |
249 | #define HDR_INDX_LEN1 2 | |
250 | #define HDR_INDX_SEQ 3 | |
251 | #define HDR_LENGTH 4 | |
252 | ||
253 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
254 | #define TYPE_LEN_DA_BIT 0x20 | |
255 | #define TYPE_LEN_DATA 0 | |
256 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
257 | ||
258 | /* How to compute the header bytes. */ | |
259 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
260 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
261 | (HDR_OFFSET \ | |
262 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
263 | + (((len) >> 6) & 0x1f)) | |
264 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
265 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
266 | ||
267 | /* Check that a header byte is reasonable. */ | |
268 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
269 | ||
270 | /* Get data from the header. These macros evaluate their argument | |
271 | multiple times. */ | |
272 | #define HDR_IS_DATA(hdr) \ | |
273 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
274 | #define HDR_GET_LEN(hdr) \ | |
275 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
276 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
277 | ||
278 | /* The maximum data length. */ | |
279 | #define DATA_MAXLEN 1023 | |
280 | ||
281 | /* The trailer offset. */ | |
282 | #define TRLR_OFFSET HDR_OFFSET | |
283 | ||
284 | /* The indices of the bytes in the packet trailer. */ | |
285 | #define TRLR_INDX_CSUM1 0 | |
286 | #define TRLR_INDX_CSUM2 1 | |
287 | #define TRLR_INDX_CSUM3 2 | |
288 | #define TRLR_LENGTH 3 | |
289 | ||
290 | /* How to compute the trailer bytes. */ | |
291 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
292 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
293 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
294 | ||
295 | /* Check that a trailer byte is reasonable. */ | |
296 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
297 | ||
298 | /* Get data from the trailer. This evaluates its argument multiple | |
299 | times. */ | |
300 | #define TRLR_GET_CKSUM(trlr) \ | |
301 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
302 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
303 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
304 | ||
305 | /* The sequence number modulos. */ | |
306 | #define SEQ_MODULOS (64) | |
307 | ||
308 | /* PMON commands to load from the serial port or UDP socket. */ | |
309 | #define LOAD_CMD "load -b -s tty0\r" | |
310 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
311 | ||
312 | /* The target vectors for the four different remote MIPS targets. | |
313 | These are initialized with code in _initialize_remote_mips instead | |
314 | of static initializers, to make it easier to extend the target_ops | |
315 | vector later. */ | |
316 | struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; | |
317 | ||
c5aa993b JM |
318 | enum mips_monitor_type |
319 | { | |
320 | /* IDT/SIM monitor being used: */ | |
321 | MON_IDT, | |
322 | /* PMON monitor being used: */ | |
323 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
324 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ | |
325 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
326 | /* Last and unused value, for sizing vectors, etc. */ | |
327 | MON_LAST | |
328 | }; | |
c906108c SS |
329 | static enum mips_monitor_type mips_monitor = MON_LAST; |
330 | ||
331 | /* The monitor prompt text. If the user sets the PMON prompt | |
332 | to some new value, the GDB `set monitor-prompt' command must also | |
333 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
334 | will not be able to connect to PMON in mips_initialize(). | |
335 | If the `set monitor-prompt' command is not used, the expected | |
336 | default prompt will be set according the target: | |
c5aa993b JM |
337 | target prompt |
338 | ----- ----- | |
339 | pmon PMON> | |
340 | ddb NEC010> | |
341 | lsi PMON> | |
342 | */ | |
c906108c SS |
343 | static char *mips_monitor_prompt; |
344 | ||
345 | /* Set to 1 if the target is open. */ | |
346 | static int mips_is_open; | |
347 | ||
348 | /* Currently active target description (if mips_is_open == 1) */ | |
349 | static struct target_ops *current_ops; | |
350 | ||
351 | /* Set to 1 while the connection is being initialized. */ | |
352 | static int mips_initializing; | |
353 | ||
354 | /* Set to 1 while the connection is being brought down. */ | |
355 | static int mips_exiting; | |
356 | ||
357 | /* The next sequence number to send. */ | |
358 | static unsigned int mips_send_seq; | |
359 | ||
360 | /* The next sequence number we expect to receive. */ | |
361 | static unsigned int mips_receive_seq; | |
362 | ||
363 | /* The time to wait before retransmitting a packet, in seconds. */ | |
364 | static int mips_retransmit_wait = 3; | |
365 | ||
366 | /* The number of times to try retransmitting a packet before giving up. */ | |
367 | static int mips_send_retries = 10; | |
368 | ||
369 | /* The number of garbage characters to accept when looking for an | |
370 | SYN for the next packet. */ | |
371 | static int mips_syn_garbage = 1050; | |
372 | ||
373 | /* The time to wait for a packet, in seconds. */ | |
374 | static int mips_receive_wait = 5; | |
375 | ||
376 | /* Set if we have sent a packet to the board but have not yet received | |
377 | a reply. */ | |
378 | static int mips_need_reply = 0; | |
379 | ||
380 | /* Handle used to access serial I/O stream. */ | |
381 | static serial_t mips_desc; | |
382 | ||
383 | /* UDP handle used to download files to target. */ | |
384 | static serial_t udp_desc; | |
385 | static int udp_in_use; | |
386 | ||
387 | /* TFTP filename used to download files to DDB board, in the form | |
388 | host:filename. */ | |
389 | static char *tftp_name; /* host:filename */ | |
390 | static char *tftp_localname; /* filename portion of above */ | |
391 | static int tftp_in_use; | |
392 | static FILE *tftp_file; | |
393 | ||
394 | /* Counts the number of times the user tried to interrupt the target (usually | |
395 | via ^C. */ | |
396 | static int interrupt_count; | |
397 | ||
398 | /* If non-zero, means that the target is running. */ | |
399 | static int mips_wait_flag = 0; | |
400 | ||
401 | /* If non-zero, monitor supports breakpoint commands. */ | |
402 | static monitor_supports_breakpoints = 0; | |
403 | ||
404 | /* Data cache header. */ | |
405 | ||
c5aa993b | 406 | #if 0 /* not used (yet?) */ |
c906108c SS |
407 | static DCACHE *mips_dcache; |
408 | #endif | |
409 | ||
410 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
411 | static int hit_watchpoint; | |
412 | ||
413 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
414 | The table is indexed by a breakpoint number, which is an integer | |
415 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. | |
c5aa993b | 416 | */ |
c906108c SS |
417 | #define MAX_LSI_BREAKPOINTS 256 |
418 | struct lsi_breakpoint_info | |
c5aa993b JM |
419 | { |
420 | enum break_type type; /* type of breakpoint */ | |
421 | CORE_ADDR addr; /* address of breakpoint */ | |
422 | int len; /* length of region being watched */ | |
423 | unsigned long value; /* value to watch */ | |
424 | } | |
425 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
426 | |
427 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
428 | Warning values may be ORed together; error values may not. */ | |
c5aa993b JM |
429 | #define W_WARN 0x100 /* This bit is set if the error code is a warning */ |
430 | #define W_MSK 0x101 /* warning: Range feature is supported via mask */ | |
431 | #define W_VAL 0x102 /* warning: Value check is not supported in hardware */ | |
432 | #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */ | |
433 | ||
434 | #define E_ERR 0x200 /* This bit is set if the error code is an error */ | |
435 | #define E_BPT 0x200 /* error: No such breakpoint number */ | |
436 | #define E_RGE 0x201 /* error: Range is not supported */ | |
437 | #define E_QAL 0x202 /* error: The requested qualifiers can not be used */ | |
438 | #define E_OUT 0x203 /* error: Out of hardware resources */ | |
439 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
440 | |
441 | struct lsi_error | |
c5aa993b JM |
442 | { |
443 | int code; /* error code */ | |
444 | char *string; /* string associated with this code */ | |
445 | }; | |
c906108c SS |
446 | |
447 | struct lsi_error lsi_warning_table[] = | |
448 | { | |
c5aa993b JM |
449 | {W_MSK, "Range feature is supported via mask"}, |
450 | {W_VAL, "Value check is not supported in hardware"}, | |
451 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
452 | {0, NULL} | |
c906108c SS |
453 | }; |
454 | ||
455 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
456 | { |
457 | {E_BPT, "No such breakpoint number"}, | |
458 | {E_RGE, "Range is not supported"}, | |
459 | {E_QAL, "The requested qualifiers can not be used"}, | |
460 | {E_OUT, "Out of hardware resources"}, | |
461 | {E_NON, "Hardware breakpoint not supported"}, | |
462 | {0, NULL} | |
c906108c SS |
463 | }; |
464 | ||
465 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
466 | of warnings returned by PMON when hardware breakpoints are used. */ | |
467 | static int monitor_warnings; | |
468 | ||
469 | ||
470 | static void | |
c5aa993b | 471 | close_ports () |
c906108c SS |
472 | { |
473 | mips_is_open = 0; | |
474 | SERIAL_CLOSE (mips_desc); | |
475 | ||
476 | if (udp_in_use) | |
477 | { | |
478 | SERIAL_CLOSE (udp_desc); | |
479 | udp_in_use = 0; | |
480 | } | |
481 | tftp_in_use = 0; | |
482 | } | |
c5aa993b | 483 | |
c906108c SS |
484 | /* Handle low-level error that we can't recover from. Note that just |
485 | error()ing out from target_wait or some such low-level place will cause | |
486 | all hell to break loose--the rest of GDB will tend to get left in an | |
487 | inconsistent state. */ | |
488 | ||
489 | static NORETURN void | |
490 | #ifdef ANSI_PROTOTYPES | |
c5aa993b | 491 | mips_error (char *string,...) |
c906108c SS |
492 | #else |
493 | mips_error (va_alist) | |
494 | va_dcl | |
495 | #endif | |
496 | { | |
497 | va_list args; | |
498 | ||
499 | #ifdef ANSI_PROTOTYPES | |
500 | va_start (args, string); | |
501 | #else | |
502 | char *string; | |
503 | va_start (args); | |
504 | string = va_arg (args, char *); | |
505 | #endif | |
c5aa993b | 506 | |
c906108c | 507 | target_terminal_ours (); |
c5aa993b | 508 | wrap_here (""); /* Force out any buffered output */ |
c906108c SS |
509 | gdb_flush (gdb_stdout); |
510 | if (error_pre_print) | |
511 | fprintf_filtered (gdb_stderr, error_pre_print); | |
512 | vfprintf_filtered (gdb_stderr, string, args); | |
513 | fprintf_filtered (gdb_stderr, "\n"); | |
514 | va_end (args); | |
515 | gdb_flush (gdb_stderr); | |
516 | ||
517 | /* Clean up in such a way that mips_close won't try to talk to the | |
518 | board (it almost surely won't work since we weren't able to talk to | |
519 | it). */ | |
520 | close_ports (); | |
521 | ||
522 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
523 | target_mourn_inferior (); | |
524 | ||
525 | return_to_top_level (RETURN_ERROR); | |
526 | } | |
527 | ||
528 | /* putc_readable - print a character, displaying non-printable chars in | |
529 | ^x notation or in hex. */ | |
530 | ||
531 | static void | |
9846de1b | 532 | fputc_readable (ch, file) |
c906108c | 533 | int ch; |
9846de1b | 534 | struct gdb_file *file; |
c906108c SS |
535 | { |
536 | if (ch == '\n') | |
9846de1b | 537 | fputc_unfiltered ('\n', file); |
c906108c | 538 | else if (ch == '\r') |
9846de1b | 539 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 540 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 541 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 542 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 543 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 544 | else |
9846de1b | 545 | fputc_unfiltered (ch, file); |
c906108c SS |
546 | } |
547 | ||
548 | ||
549 | /* puts_readable - print a string, displaying non-printable chars in | |
550 | ^x notation or in hex. */ | |
551 | ||
552 | static void | |
9846de1b | 553 | fputs_readable (string, file) |
c906108c | 554 | char *string; |
9846de1b | 555 | struct gdb_file *file; |
c906108c SS |
556 | { |
557 | int c; | |
558 | ||
559 | while ((c = *string++) != '\0') | |
9846de1b | 560 | fputc_readable (c, file); |
c906108c SS |
561 | } |
562 | ||
563 | ||
564 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
565 | timed out. TIMEOUT specifies timeout value in seconds. | |
c5aa993b | 566 | */ |
c906108c SS |
567 | |
568 | int | |
569 | mips_expect_timeout (string, timeout) | |
570 | char *string; | |
571 | int timeout; | |
572 | { | |
573 | char *p = string; | |
574 | ||
575 | if (remote_debug) | |
576 | { | |
9846de1b JM |
577 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
578 | fputs_readable (string, gdb_stdlog); | |
579 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
580 | } |
581 | ||
582 | immediate_quit = 1; | |
583 | while (1) | |
584 | { | |
585 | int c; | |
586 | ||
587 | /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we | |
588 | were waiting for the mips_monitor_prompt... */ | |
589 | ||
590 | c = SERIAL_READCHAR (mips_desc, timeout); | |
591 | ||
592 | if (c == SERIAL_TIMEOUT) | |
593 | { | |
594 | if (remote_debug) | |
9846de1b | 595 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
596 | return 0; |
597 | } | |
598 | ||
599 | if (remote_debug) | |
9846de1b | 600 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
601 | |
602 | if (c == *p++) | |
c5aa993b | 603 | { |
c906108c SS |
604 | if (*p == '\0') |
605 | { | |
606 | immediate_quit = 0; | |
607 | if (remote_debug) | |
9846de1b | 608 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
609 | return 1; |
610 | } | |
611 | } | |
612 | else | |
613 | { | |
614 | p = string; | |
615 | if (c == *p) | |
616 | p++; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
622 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
623 | mips_expect_timeout if a different timeout value is needed. | |
c5aa993b | 624 | */ |
c906108c SS |
625 | |
626 | int | |
627 | mips_expect (string) | |
628 | char *string; | |
629 | { | |
c5aa993b | 630 | return mips_expect_timeout (string, 2); |
c906108c SS |
631 | } |
632 | ||
633 | /* Read the required number of characters into the given buffer (which | |
634 | is assumed to be large enough). The only failure is a timeout. */ | |
635 | int | |
636 | mips_getstring (string, n) | |
637 | char *string; | |
638 | int n; | |
639 | { | |
640 | char *p = string; | |
641 | int c; | |
642 | ||
643 | immediate_quit = 1; | |
644 | while (n > 0) | |
645 | { | |
646 | c = SERIAL_READCHAR (mips_desc, 2); | |
647 | ||
c5aa993b JM |
648 | if (c == SERIAL_TIMEOUT) |
649 | { | |
650 | fprintf_unfiltered (gdb_stderr, | |
651 | "Failed to read %d characters from target (TIMEOUT)\n", n); | |
652 | return 0; | |
653 | } | |
c906108c SS |
654 | |
655 | *p++ = c; | |
656 | n--; | |
657 | } | |
658 | ||
659 | return 1; | |
660 | } | |
661 | ||
662 | /* Read a character from the remote, aborting on error. Returns | |
663 | SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR | |
664 | returns). FIXME: If we see the string mips_monitor_prompt from | |
665 | the board, then we are debugging on the main console port, and we | |
666 | have somehow dropped out of remote debugging mode. In this case, | |
667 | we automatically go back in to remote debugging mode. This is a | |
668 | hack, put in because I can't find any way for a program running on | |
669 | the remote board to terminate without also ending remote debugging | |
670 | mode. I assume users won't have any trouble with this; for one | |
671 | thing, the IDT documentation generally assumes that the remote | |
672 | debugging port is not the console port. This is, however, very | |
673 | convenient for DejaGnu when you only have one connected serial | |
674 | port. */ | |
675 | ||
676 | static int | |
677 | mips_readchar (timeout) | |
678 | int timeout; | |
679 | { | |
680 | int ch; | |
681 | static int state = 0; | |
682 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
683 | ||
c906108c SS |
684 | { |
685 | int i; | |
686 | ||
687 | i = timeout; | |
688 | if (i == -1 && watchdog > 0) | |
c5aa993b | 689 | i = watchdog; |
c906108c | 690 | } |
c906108c SS |
691 | |
692 | if (state == mips_monitor_prompt_len) | |
693 | timeout = 1; | |
694 | ch = SERIAL_READCHAR (mips_desc, timeout); | |
7a292a7a | 695 | |
c5aa993b | 696 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ |
c906108c SS |
697 | { |
698 | target_mourn_inferior (); | |
699 | error ("Watchdog has expired. Target detached.\n"); | |
700 | } | |
7a292a7a | 701 | |
c906108c SS |
702 | if (ch == SERIAL_EOF) |
703 | mips_error ("End of file from remote"); | |
704 | if (ch == SERIAL_ERROR) | |
705 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); | |
706 | if (remote_debug > 1) | |
707 | { | |
708 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 709 | target_wait, and I think this might be called from there. */ |
c906108c | 710 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 711 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 712 | else |
9846de1b | 713 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
714 | } |
715 | ||
716 | /* If we have seen mips_monitor_prompt and we either time out, or | |
717 | we see a @ (which was echoed from a packet we sent), reset the | |
718 | board as described above. The first character in a packet after | |
719 | the SYN (which is not echoed) is always an @ unless the packet is | |
720 | more than 64 characters long, which ours never are. */ | |
721 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
722 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
723 | && !mips_initializing |
724 | && !mips_exiting) | |
c906108c SS |
725 | { |
726 | if (remote_debug > 0) | |
727 | /* Don't use _filtered; we can't deal with a QUIT out of | |
728 | target_wait, and I think this might be called from there. */ | |
9846de1b | 729 | fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n"); |
c906108c SS |
730 | |
731 | mips_need_reply = 0; | |
732 | mips_initialize (); | |
733 | ||
734 | state = 0; | |
735 | ||
736 | /* At this point, about the only thing we can do is abort the command | |
c5aa993b | 737 | in progress and get back to command level as quickly as possible. */ |
c906108c SS |
738 | |
739 | error ("Remote board reset, debug protocol re-initialized."); | |
740 | } | |
741 | ||
742 | if (ch == mips_monitor_prompt[state]) | |
743 | ++state; | |
744 | else | |
745 | state = 0; | |
746 | ||
747 | return ch; | |
748 | } | |
749 | ||
750 | /* Get a packet header, putting the data in the supplied buffer. | |
751 | PGARBAGE is a pointer to the number of garbage characters received | |
752 | so far. CH is the last character received. Returns 0 for success, | |
753 | or -1 for timeout. */ | |
754 | ||
755 | static int | |
756 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
757 | unsigned char *hdr; | |
758 | int *pgarbage; | |
759 | int ch; | |
760 | int timeout; | |
761 | { | |
762 | int i; | |
763 | ||
764 | while (1) | |
765 | { | |
766 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
767 | sitting here indefinitely if the board sends us one garbage |
768 | character per second. ch may already have a value from the | |
769 | last time through the loop. */ | |
c906108c SS |
770 | while (ch != SYN) |
771 | { | |
772 | ch = mips_readchar (timeout); | |
773 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 774 | return -1; |
c906108c SS |
775 | if (ch != SYN) |
776 | { | |
777 | /* Printing the character here lets the user of gdb see | |
c5aa993b JM |
778 | what the program is outputting, if the debugging is |
779 | being done on the console port. Don't use _filtered; | |
780 | we can't deal with a QUIT out of target_wait. */ | |
781 | if (!mips_initializing || remote_debug > 0) | |
c906108c | 782 | { |
9846de1b JM |
783 | fputc_readable (ch, gdb_stdlog); |
784 | gdb_flush (gdb_stdlog); | |
c906108c SS |
785 | } |
786 | ||
787 | ++*pgarbage; | |
788 | if (mips_syn_garbage > 0 | |
789 | && *pgarbage > mips_syn_garbage) | |
c5aa993b | 790 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
c906108c SS |
791 | mips_syn_garbage); |
792 | } | |
793 | } | |
794 | ||
795 | /* Get the packet header following the SYN. */ | |
796 | for (i = 1; i < HDR_LENGTH; i++) | |
797 | { | |
798 | ch = mips_readchar (timeout); | |
799 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 800 | return -1; |
c906108c | 801 | /* Make sure this is a header byte. */ |
c5aa993b | 802 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
803 | break; |
804 | ||
805 | hdr[i] = ch; | |
806 | } | |
807 | ||
808 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 809 | loop around and keep looking for SYN. */ |
c906108c | 810 | if (i >= HDR_LENGTH) |
c5aa993b | 811 | return 0; |
c906108c SS |
812 | } |
813 | } | |
814 | ||
815 | /* Get a packet header, putting the data in the supplied buffer. | |
816 | PGARBAGE is a pointer to the number of garbage characters received | |
817 | so far. The last character read is returned in *PCH. Returns 0 | |
818 | for success, -1 for timeout, -2 for error. */ | |
819 | ||
820 | static int | |
821 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
822 | unsigned char *trlr; | |
823 | int *pgarbage; | |
824 | int *pch; | |
825 | int timeout; | |
826 | { | |
827 | int i; | |
828 | int ch; | |
829 | ||
830 | for (i = 0; i < TRLR_LENGTH; i++) | |
831 | { | |
832 | ch = mips_readchar (timeout); | |
833 | *pch = ch; | |
834 | if (ch == SERIAL_TIMEOUT) | |
835 | return -1; | |
c5aa993b | 836 | if (!TRLR_CHECK (ch)) |
c906108c SS |
837 | return -2; |
838 | trlr[i] = ch; | |
839 | } | |
840 | return 0; | |
841 | } | |
842 | ||
843 | /* Get the checksum of a packet. HDR points to the packet header. | |
844 | DATA points to the packet data. LEN is the length of DATA. */ | |
845 | ||
846 | static int | |
847 | mips_cksum (hdr, data, len) | |
848 | const unsigned char *hdr; | |
849 | const unsigned char *data; | |
850 | int len; | |
851 | { | |
852 | register const unsigned char *p; | |
853 | register int c; | |
854 | register int cksum; | |
855 | ||
856 | cksum = 0; | |
857 | ||
858 | /* The initial SYN is not included in the checksum. */ | |
859 | c = HDR_LENGTH - 1; | |
860 | p = hdr + 1; | |
861 | while (c-- != 0) | |
862 | cksum += *p++; | |
c5aa993b | 863 | |
c906108c SS |
864 | c = len; |
865 | p = data; | |
866 | while (c-- != 0) | |
867 | cksum += *p++; | |
868 | ||
869 | return cksum; | |
870 | } | |
871 | ||
872 | /* Send a packet containing the given ASCII string. */ | |
873 | ||
874 | static void | |
875 | mips_send_packet (s, get_ack) | |
876 | const char *s; | |
877 | int get_ack; | |
878 | { | |
879 | /* unsigned */ int len; | |
880 | unsigned char *packet; | |
881 | register int cksum; | |
882 | int try; | |
883 | ||
884 | len = strlen (s); | |
885 | if (len > DATA_MAXLEN) | |
886 | mips_error ("MIPS protocol data packet too long: %s", s); | |
887 | ||
888 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
889 | ||
890 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
891 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
892 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
893 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
894 | ||
895 | memcpy (packet + HDR_LENGTH, s, len); | |
896 | ||
897 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
898 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
899 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
900 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
901 | ||
902 | /* Increment the sequence number. This will set mips_send_seq to | |
903 | the sequence number we expect in the acknowledgement. */ | |
904 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
905 | ||
906 | /* We can only have one outstanding data packet, so we just wait for | |
907 | the acknowledgement here. Keep retransmitting the packet until | |
908 | we get one, or until we've tried too many times. */ | |
909 | for (try = 0; try < mips_send_retries; try++) | |
910 | { | |
911 | int garbage; | |
912 | int ch; | |
913 | ||
914 | if (remote_debug > 0) | |
915 | { | |
916 | /* Don't use _filtered; we can't deal with a QUIT out of | |
917 | target_wait, and I think this might be called from there. */ | |
918 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 919 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
920 | } |
921 | ||
922 | if (SERIAL_WRITE (mips_desc, packet, | |
923 | HDR_LENGTH + len + TRLR_LENGTH) != 0) | |
924 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
925 | ||
c5aa993b | 926 | if (!get_ack) |
c906108c SS |
927 | return; |
928 | ||
929 | garbage = 0; | |
930 | ch = 0; | |
931 | while (1) | |
932 | { | |
933 | unsigned char hdr[HDR_LENGTH + 1]; | |
934 | unsigned char trlr[TRLR_LENGTH + 1]; | |
935 | int err; | |
936 | unsigned int seq; | |
937 | ||
938 | /* Get the packet header. If we time out, resend the data | |
939 | packet. */ | |
940 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
941 | if (err != 0) | |
942 | break; | |
943 | ||
944 | ch = 0; | |
945 | ||
946 | /* If we get a data packet, assume it is a duplicate and | |
947 | ignore it. FIXME: If the acknowledgement is lost, this | |
948 | data packet may be the packet the remote sends after the | |
949 | acknowledgement. */ | |
c5aa993b JM |
950 | if (HDR_IS_DATA (hdr)) |
951 | { | |
952 | int i; | |
953 | ||
954 | /* Ignore any errors raised whilst attempting to ignore | |
955 | packet. */ | |
956 | ||
957 | len = HDR_GET_LEN (hdr); | |
958 | ||
959 | for (i = 0; i < len; i++) | |
960 | { | |
961 | int rch; | |
962 | ||
963 | rch = mips_readchar (2); | |
964 | if (rch == SYN) | |
965 | { | |
966 | ch = SYN; | |
967 | break; | |
968 | } | |
969 | if (rch == SERIAL_TIMEOUT) | |
970 | break; | |
971 | /* ignore the character */ | |
972 | } | |
973 | ||
974 | if (i == len) | |
975 | (void) mips_receive_trailer (trlr, &garbage, &ch, 2); | |
976 | ||
977 | /* We don't bother checking the checksum, or providing an | |
978 | ACK to the packet. */ | |
979 | continue; | |
980 | } | |
c906108c SS |
981 | |
982 | /* If the length is not 0, this is a garbled packet. */ | |
983 | if (HDR_GET_LEN (hdr) != 0) | |
984 | continue; | |
985 | ||
986 | /* Get the packet trailer. */ | |
987 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
988 | mips_retransmit_wait); | |
989 | ||
990 | /* If we timed out, resend the data packet. */ | |
991 | if (err == -1) | |
992 | break; | |
993 | ||
994 | /* If we got a bad character, reread the header. */ | |
995 | if (err != 0) | |
996 | continue; | |
997 | ||
998 | /* If the checksum does not match the trailer checksum, this | |
999 | is a bad packet; ignore it. */ | |
1000 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
1001 | != TRLR_GET_CKSUM (trlr)) | |
1002 | continue; | |
1003 | ||
1004 | if (remote_debug > 0) | |
1005 | { | |
1006 | hdr[HDR_LENGTH] = '\0'; | |
1007 | trlr[TRLR_LENGTH] = '\0'; | |
1008 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1009 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
1010 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
1011 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
1012 | } |
1013 | ||
1014 | /* If this ack is for the current packet, we're done. */ | |
1015 | seq = HDR_GET_SEQ (hdr); | |
1016 | if (seq == mips_send_seq) | |
1017 | return; | |
1018 | ||
1019 | /* If this ack is for the last packet, resend the current | |
1020 | packet. */ | |
1021 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
1022 | break; | |
1023 | ||
1024 | /* Otherwise this is a bad ack; ignore it. Increment the | |
1025 | garbage count to ensure that we do not stay in this loop | |
1026 | forever. */ | |
1027 | ++garbage; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | mips_error ("Remote did not acknowledge packet"); | |
1032 | } | |
1033 | ||
1034 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
1035 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
1036 | implies that only the sender retransmits packets, so this code just | |
1037 | waits silently for a packet. It returns the length of the received | |
1038 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
1039 | don't print an error message and return -1. */ | |
1040 | ||
1041 | static int | |
1042 | mips_receive_packet (buff, throw_error, timeout) | |
1043 | char *buff; | |
1044 | int throw_error; | |
1045 | int timeout; | |
1046 | { | |
1047 | int ch; | |
1048 | int garbage; | |
1049 | int len; | |
1050 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
1051 | int cksum; | |
1052 | ||
1053 | ch = 0; | |
1054 | garbage = 0; | |
1055 | while (1) | |
1056 | { | |
1057 | unsigned char hdr[HDR_LENGTH]; | |
1058 | unsigned char trlr[TRLR_LENGTH]; | |
1059 | int i; | |
1060 | int err; | |
1061 | ||
1062 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
1063 | { | |
1064 | if (throw_error) | |
1065 | mips_error ("Timed out waiting for remote packet"); | |
1066 | else | |
1067 | return -1; | |
1068 | } | |
1069 | ||
1070 | ch = 0; | |
1071 | ||
1072 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1073 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1074 | { |
c5aa993b JM |
1075 | len = HDR_GET_LEN (hdr); |
1076 | /* Check if the length is valid for an ACK, we may aswell | |
1077 | try and read the remainder of the packet: */ | |
1078 | if (len == 0) | |
1079 | { | |
1080 | /* Ignore the error condition, since we are going to | |
1081 | ignore the packet anyway. */ | |
1082 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1083 | } | |
c906108c SS |
1084 | /* Don't use _filtered; we can't deal with a QUIT out of |
1085 | target_wait, and I think this might be called from there. */ | |
1086 | if (remote_debug > 0) | |
9846de1b | 1087 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1088 | continue; |
1089 | } | |
1090 | ||
1091 | len = HDR_GET_LEN (hdr); | |
1092 | for (i = 0; i < len; i++) | |
1093 | { | |
1094 | int rch; | |
1095 | ||
1096 | rch = mips_readchar (timeout); | |
1097 | if (rch == SYN) | |
1098 | { | |
1099 | ch = SYN; | |
1100 | break; | |
1101 | } | |
1102 | if (rch == SERIAL_TIMEOUT) | |
1103 | { | |
1104 | if (throw_error) | |
1105 | mips_error ("Timed out waiting for remote packet"); | |
1106 | else | |
1107 | return -1; | |
1108 | } | |
1109 | buff[i] = rch; | |
1110 | } | |
1111 | ||
1112 | if (i < len) | |
1113 | { | |
1114 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1115 | target_wait, and I think this might be called from there. */ | |
1116 | if (remote_debug > 0) | |
9846de1b JM |
1117 | fprintf_unfiltered (gdb_stdlog, |
1118 | "Got new SYN after %d chars (wanted %d)\n", | |
1119 | i, len); | |
c906108c SS |
1120 | continue; |
1121 | } | |
1122 | ||
1123 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1124 | if (err == -1) | |
1125 | { | |
1126 | if (throw_error) | |
1127 | mips_error ("Timed out waiting for packet"); | |
1128 | else | |
1129 | return -1; | |
1130 | } | |
1131 | if (err == -2) | |
1132 | { | |
1133 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1134 | target_wait, and I think this might be called from there. */ | |
1135 | if (remote_debug > 0) | |
9846de1b | 1136 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1137 | continue; |
1138 | } | |
1139 | ||
1140 | /* If this is the wrong sequence number, ignore it. */ | |
1141 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1142 | { | |
1143 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1144 | target_wait, and I think this might be called from there. */ | |
1145 | if (remote_debug > 0) | |
9846de1b | 1146 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1147 | "Ignoring sequence number %d (want %d)\n", |
1148 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1149 | continue; |
1150 | } | |
1151 | ||
1152 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1153 | break; |
c906108c SS |
1154 | |
1155 | if (remote_debug > 0) | |
1156 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1157 | target_wait, and I think this might be called from there. */ | |
1158 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1159 | mips_cksum (hdr, buff, len), |
1160 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1161 | |
1162 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1163 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1164 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1165 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1166 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1167 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1168 | ||
1169 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1170 | ||
1171 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1172 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1173 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1174 | ||
1175 | if (remote_debug > 0) | |
1176 | { | |
1177 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1178 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1179 | target_wait, and I think this might be called from there. */ | |
1180 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1181 | ack + 1); |
c906108c SS |
1182 | } |
1183 | ||
1184 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) | |
1185 | { | |
1186 | if (throw_error) | |
1187 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1188 | else | |
1189 | return -1; | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | if (remote_debug > 0) | |
1194 | { | |
1195 | buff[len] = '\0'; | |
1196 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1197 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1198 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1199 | } | |
1200 | ||
1201 | /* We got the packet. Send an acknowledgement. */ | |
1202 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1203 | ||
1204 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1205 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1206 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1207 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1208 | ||
1209 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1210 | ||
1211 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1212 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1213 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1214 | ||
1215 | if (remote_debug > 0) | |
1216 | { | |
1217 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1218 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1219 | target_wait, and I think this might be called from there. */ |
c906108c | 1220 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1221 | ack + 1); |
c906108c SS |
1222 | } |
1223 | ||
1224 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) | |
1225 | { | |
1226 | if (throw_error) | |
1227 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1228 | else | |
1229 | return -1; | |
1230 | } | |
1231 | ||
1232 | return len; | |
1233 | } | |
1234 | \f | |
1235 | /* Optionally send a request to the remote system and optionally wait | |
1236 | for the reply. This implements the remote debugging protocol, | |
1237 | which is built on top of the packet protocol defined above. Each | |
1238 | request has an ADDR argument and a DATA argument. The following | |
1239 | requests are defined: | |
1240 | ||
c5aa993b JM |
1241 | \0 don't send a request; just wait for a reply |
1242 | i read word from instruction space at ADDR | |
1243 | d read word from data space at ADDR | |
1244 | I write DATA to instruction space at ADDR | |
1245 | D write DATA to data space at ADDR | |
1246 | r read register number ADDR | |
1247 | R set register number ADDR to value DATA | |
1248 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1249 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1250 | |
1251 | The read requests return the value requested. The write requests | |
1252 | return the previous value in the changed location. The execution | |
1253 | requests return a UNIX wait value (the approximate signal which | |
1254 | caused execution to stop is in the upper eight bits). | |
1255 | ||
1256 | If PERR is not NULL, this function waits for a reply. If an error | |
1257 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1258 | target board reports. */ | |
1259 | ||
c5aa993b | 1260 | static CORE_ADDR |
c906108c SS |
1261 | mips_request (cmd, addr, data, perr, timeout, buff) |
1262 | int cmd; | |
1263 | CORE_ADDR addr; | |
1264 | CORE_ADDR data; | |
1265 | int *perr; | |
1266 | int timeout; | |
1267 | char *buff; | |
1268 | { | |
1269 | char myBuff[DATA_MAXLEN + 1]; | |
1270 | int len; | |
1271 | int rpid; | |
1272 | char rcmd; | |
1273 | int rerrflg; | |
1274 | unsigned long rresponse; | |
1275 | ||
1276 | if (buff == (char *) NULL) | |
1277 | buff = myBuff; | |
1278 | ||
1279 | if (cmd != '\0') | |
1280 | { | |
1281 | if (mips_need_reply) | |
1282 | fatal ("mips_request: Trying to send command before reply"); | |
1283 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data)); | |
1284 | mips_send_packet (buff, 1); | |
1285 | mips_need_reply = 1; | |
1286 | } | |
1287 | ||
1288 | if (perr == (int *) NULL) | |
1289 | return 0; | |
1290 | ||
c5aa993b | 1291 | if (!mips_need_reply) |
c906108c SS |
1292 | fatal ("mips_request: Trying to get reply before command"); |
1293 | ||
1294 | mips_need_reply = 0; | |
1295 | ||
1296 | len = mips_receive_packet (buff, 1, timeout); | |
1297 | buff[len] = '\0'; | |
1298 | ||
1299 | if (sscanf (buff, "0x%x %c 0x%x 0x%lx", | |
1300 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
1301 | || (cmd != '\0' && rcmd != cmd)) | |
1302 | mips_error ("Bad response from remote board"); | |
1303 | ||
1304 | if (rerrflg != 0) | |
1305 | { | |
1306 | *perr = 1; | |
1307 | ||
1308 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1309 | not be the same as errno values used on other systems. If |
1310 | they stick to common errno values, they will be the same, but | |
1311 | if they don't, they must be translated. */ | |
c906108c SS |
1312 | errno = rresponse; |
1313 | ||
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | *perr = 0; | |
1318 | return rresponse; | |
1319 | } | |
1320 | ||
1321 | static void | |
1322 | mips_initialize_cleanups (arg) | |
1323 | PTR arg; | |
1324 | { | |
1325 | mips_initializing = 0; | |
1326 | } | |
1327 | ||
1328 | static void | |
1329 | mips_exit_cleanups (arg) | |
1330 | PTR arg; | |
1331 | { | |
1332 | mips_exiting = 0; | |
1333 | } | |
1334 | ||
1335 | static void | |
1336 | mips_send_command (cmd, prompt) | |
1337 | const char *cmd; | |
1338 | int prompt; | |
1339 | { | |
c5aa993b | 1340 | SERIAL_WRITE (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1341 | mips_expect (cmd); |
1342 | mips_expect ("\n"); | |
1343 | if (prompt) | |
1344 | mips_expect (mips_monitor_prompt); | |
1345 | } | |
1346 | ||
1347 | /* Enter remote (dbx) debug mode: */ | |
1348 | static void | |
1349 | mips_enter_debug () | |
1350 | { | |
1351 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1352 | mips_send_seq = 0; | |
1353 | mips_receive_seq = 0; | |
1354 | ||
1355 | if (mips_monitor != MON_IDT) | |
1356 | mips_send_command ("debug\r", 0); | |
c5aa993b | 1357 | else /* assume IDT monitor by default */ |
c906108c SS |
1358 | mips_send_command ("db tty0\r", 0); |
1359 | ||
c5aa993b | 1360 | sleep (1); |
c906108c SS |
1361 | SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1); |
1362 | ||
1363 | /* We don't need to absorb any spurious characters here, since the | |
1364 | mips_receive_header will eat up a reasonable number of characters | |
1365 | whilst looking for the SYN, however this avoids the "garbage" | |
1366 | being displayed to the user. */ | |
1367 | if (mips_monitor != MON_IDT) | |
1368 | mips_expect ("\r"); | |
c5aa993b | 1369 | |
c906108c SS |
1370 | { |
1371 | char buff[DATA_MAXLEN + 1]; | |
1372 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1373 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1378 | static int | |
1379 | mips_exit_debug () | |
1380 | { | |
1381 | int err; | |
1382 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1383 | ||
1384 | mips_exiting = 1; | |
1385 | ||
1386 | if (mips_monitor != MON_IDT) | |
1387 | { | |
1388 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1389 | so we do not get a reply to this command: */ | |
1390 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL, | |
c5aa993b | 1391 | mips_receive_wait, NULL); |
c906108c SS |
1392 | mips_need_reply = 0; |
1393 | if (!mips_expect (" break!")) | |
c5aa993b | 1394 | return -1; |
c906108c SS |
1395 | } |
1396 | else | |
1397 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, | |
c5aa993b | 1398 | mips_receive_wait, NULL); |
c906108c SS |
1399 | |
1400 | if (!mips_expect (mips_monitor_prompt)) | |
1401 | return -1; | |
1402 | ||
1403 | do_cleanups (old_cleanups); | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1409 | really connected. */ | |
1410 | ||
1411 | static void | |
1412 | mips_initialize () | |
1413 | { | |
1414 | int err; | |
1415 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); | |
1416 | int j; | |
1417 | ||
1418 | /* What is this code doing here? I don't see any way it can happen, and | |
1419 | it might mean mips_initializing didn't get cleared properly. | |
1420 | So I'll make it a warning. */ | |
1421 | ||
1422 | if (mips_initializing) | |
1423 | { | |
1424 | warning ("internal error: mips_initialize called twice"); | |
1425 | return; | |
1426 | } | |
1427 | ||
1428 | mips_wait_flag = 0; | |
1429 | mips_initializing = 1; | |
1430 | ||
1431 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1432 | into the monitor, and restarting the protocol. */ | |
1433 | ||
1434 | /* Force the system into the monitor. After this we *should* be at | |
1435 | the mips_monitor_prompt. */ | |
1436 | if (mips_monitor != MON_IDT) | |
c5aa993b | 1437 | j = 0; /* start by checking if we are already at the prompt */ |
c906108c | 1438 | else |
c5aa993b | 1439 | j = 1; /* start by sending a break */ |
c906108c SS |
1440 | for (; j <= 4; j++) |
1441 | { | |
1442 | switch (j) | |
1443 | { | |
c5aa993b JM |
1444 | case 0: /* First, try sending a CR */ |
1445 | SERIAL_FLUSH_INPUT (mips_desc); | |
c906108c | 1446 | SERIAL_WRITE (mips_desc, "\r", 1); |
c5aa993b JM |
1447 | break; |
1448 | case 1: /* First, try sending a break */ | |
c906108c SS |
1449 | SERIAL_SEND_BREAK (mips_desc); |
1450 | break; | |
c5aa993b | 1451 | case 2: /* Then, try a ^C */ |
c906108c SS |
1452 | SERIAL_WRITE (mips_desc, "\003", 1); |
1453 | break; | |
c5aa993b | 1454 | case 3: /* Then, try escaping from download */ |
c906108c | 1455 | { |
c5aa993b JM |
1456 | if (mips_monitor != MON_IDT) |
1457 | { | |
1458 | char tbuff[7]; | |
1459 | ||
1460 | /* We shouldn't need to send multiple termination | |
1461 | sequences, since the target performs line (or | |
1462 | block) reads, and then processes those | |
1463 | packets. In-case we were downloading a large packet | |
1464 | we flush the output buffer before inserting a | |
1465 | termination sequence. */ | |
1466 | SERIAL_FLUSH_OUTPUT (mips_desc); | |
1467 | sprintf (tbuff, "\r/E/E\r"); | |
1468 | SERIAL_WRITE (mips_desc, tbuff, 6); | |
1469 | } | |
1470 | else | |
1471 | { | |
1472 | char srec[10]; | |
1473 | int i; | |
1474 | ||
1475 | /* We are possibly in binary download mode, having | |
1476 | aborted in the middle of an S-record. ^C won't | |
1477 | work because of binary mode. The only reliable way | |
1478 | out is to send enough termination packets (8 bytes) | |
1479 | to fill up and then overflow the largest size | |
1480 | S-record (255 bytes in this case). This amounts to | |
1481 | 256/8 + 1 packets. | |
1482 | */ | |
1483 | ||
1484 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1485 | ||
1486 | for (i = 1; i <= 33; i++) | |
1487 | { | |
1488 | SERIAL_WRITE (mips_desc, srec, 8); | |
1489 | ||
1490 | if (SERIAL_READCHAR (mips_desc, 0) >= 0) | |
1491 | break; /* Break immediatly if we get something from | |
c906108c | 1492 | the board. */ |
c5aa993b JM |
1493 | } |
1494 | } | |
1495 | } | |
c906108c SS |
1496 | break; |
1497 | case 4: | |
1498 | mips_error ("Failed to initialize."); | |
1499 | } | |
1500 | ||
1501 | if (mips_expect (mips_monitor_prompt)) | |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | if (mips_monitor != MON_IDT) | |
1506 | { | |
1507 | /* Sometimes PMON ignores the first few characters in the first | |
1508 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1509 | around that. */ |
c906108c SS |
1510 | mips_send_command ("\r", -1); |
1511 | ||
1512 | /* Ensure the correct target state: */ | |
1513 | if (mips_monitor != MON_LSI) | |
1514 | mips_send_command ("set regsize 64\r", -1); | |
1515 | mips_send_command ("set hostport tty0\r", -1); | |
1516 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1517 | /* Delete all the current breakpoints: */ | |
1518 | mips_send_command ("db *\r", -1); | |
1519 | /* NOTE: PMON does not have breakpoint support through the | |
1520 | "debug" mode, only at the monitor command-line. */ | |
1521 | } | |
1522 | ||
1523 | mips_enter_debug (); | |
1524 | ||
1525 | /* Clear all breakpoints: */ | |
1526 | if ((mips_monitor == MON_IDT | |
1527 | && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) | |
1528 | || mips_monitor == MON_LSI) | |
1529 | monitor_supports_breakpoints = 1; | |
1530 | else | |
1531 | monitor_supports_breakpoints = 0; | |
1532 | ||
1533 | do_cleanups (old_cleanups); | |
1534 | ||
1535 | /* If this doesn't call error, we have connected; we don't care if | |
1536 | the request itself succeeds or fails. */ | |
1537 | ||
1538 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err, | |
1539 | mips_receive_wait, NULL); | |
1540 | set_current_frame (create_new_frame (read_fp (), read_pc ())); | |
1541 | select_frame (get_current_frame (), 0); | |
1542 | } | |
1543 | ||
1544 | /* Open a connection to the remote board. */ | |
1545 | static void | |
1546 | common_open (ops, name, from_tty, new_monitor, new_monitor_prompt) | |
1547 | struct target_ops *ops; | |
1548 | char *name; | |
1549 | int from_tty; | |
1550 | enum mips_monitor_type new_monitor; | |
1551 | char *new_monitor_prompt; | |
1552 | { | |
1553 | char *ptype; | |
1554 | char *serial_port_name; | |
1555 | char *remote_name = 0; | |
1556 | char *local_name = 0; | |
1557 | char **argv; | |
1558 | ||
1559 | if (name == 0) | |
1560 | error ( | |
c5aa993b | 1561 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ |
c906108c | 1562 | device is attached to the target board (e.g., /dev/ttya).\n" |
c5aa993b JM |
1563 | "If you want to use TFTP to download to the board, specify the name of a\n" |
1564 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1565 | "This filename must be in the form host:filename, where host is the name\n" | |
1566 | "of the host running the TFTP server, and the file must be readable by the\n" | |
1567 | "world. If the local name of the temporary file differs from the name as\n" | |
1568 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
c906108c SS |
1569 | |
1570 | /* Parse the serial port name, the optional TFTP name, and the | |
1571 | optional local TFTP name. */ | |
1572 | if ((argv = buildargv (name)) == NULL) | |
c5aa993b | 1573 | nomem (0); |
7a292a7a | 1574 | make_cleanup_freeargv (argv); |
c906108c SS |
1575 | |
1576 | serial_port_name = strsave (argv[0]); | |
c5aa993b | 1577 | if (argv[1]) /* remote TFTP name specified? */ |
c906108c SS |
1578 | { |
1579 | remote_name = argv[1]; | |
c5aa993b | 1580 | if (argv[2]) /* local TFTP filename specified? */ |
c906108c SS |
1581 | local_name = argv[2]; |
1582 | } | |
1583 | ||
1584 | target_preopen (from_tty); | |
1585 | ||
1586 | if (mips_is_open) | |
1587 | unpush_target (current_ops); | |
1588 | ||
1589 | /* Open and initialize the serial port. */ | |
1590 | mips_desc = SERIAL_OPEN (serial_port_name); | |
1591 | if (mips_desc == (serial_t) NULL) | |
1592 | perror_with_name (serial_port_name); | |
1593 | ||
1594 | if (baud_rate != -1) | |
1595 | { | |
1596 | if (SERIAL_SETBAUDRATE (mips_desc, baud_rate)) | |
c5aa993b JM |
1597 | { |
1598 | SERIAL_CLOSE (mips_desc); | |
1599 | perror_with_name (serial_port_name); | |
1600 | } | |
c906108c SS |
1601 | } |
1602 | ||
1603 | SERIAL_RAW (mips_desc); | |
1604 | ||
1605 | /* Open and initialize the optional download port. If it is in the form | |
1606 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1607 | hostname:filename, assume it's the TFTP filename that must be | |
1608 | passed to the DDB board to tell it where to get the load file. */ | |
1609 | if (remote_name) | |
1610 | { | |
1611 | if (strchr (remote_name, '#')) | |
1612 | { | |
1613 | udp_desc = SERIAL_OPEN (remote_name); | |
1614 | if (!udp_desc) | |
1615 | perror_with_name ("Unable to open UDP port"); | |
1616 | udp_in_use = 1; | |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | /* Save the remote and local names of the TFTP temp file. If | |
1621 | the user didn't specify a local name, assume it's the same | |
1622 | as the part of the remote name after the "host:". */ | |
1623 | if (tftp_name) | |
1624 | free (tftp_name); | |
1625 | if (tftp_localname) | |
1626 | free (tftp_localname); | |
1627 | if (local_name == NULL) | |
c5aa993b JM |
1628 | if ((local_name = strchr (remote_name, ':')) != NULL) |
1629 | local_name++; /* skip over the colon */ | |
c906108c SS |
1630 | if (local_name == NULL) |
1631 | local_name = remote_name; /* local name same as remote name */ | |
1632 | tftp_name = strsave (remote_name); | |
1633 | tftp_localname = strsave (local_name); | |
1634 | tftp_in_use = 1; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | current_ops = ops; | |
1639 | mips_is_open = 1; | |
1640 | ||
1641 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1642 | if (mips_monitor_prompt == NULL) | |
1643 | mips_monitor_prompt = strsave (new_monitor_prompt); | |
1644 | mips_monitor = new_monitor; | |
1645 | ||
1646 | mips_initialize (); | |
1647 | ||
1648 | if (from_tty) | |
1649 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1650 | ||
1651 | /* Switch to using remote target now. */ | |
1652 | push_target (ops); | |
1653 | ||
1654 | /* FIXME: Should we call start_remote here? */ | |
1655 | ||
1656 | /* Try to figure out the processor model if possible. */ | |
1657 | ptype = mips_read_processor_type (); | |
1658 | if (ptype) | |
1659 | mips_set_processor_type_command (strsave (ptype), 0); | |
1660 | ||
1661 | /* This is really the job of start_remote however, that makes an assumption | |
1662 | that the target is about to print out a status message of some sort. That | |
1663 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
1664 | send the appropriate packet). */ | |
1665 | ||
1666 | flush_cached_frames (); | |
1667 | registers_changed (); | |
1668 | stop_pc = read_pc (); | |
1669 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
1670 | select_frame (get_current_frame (), 0); | |
1671 | print_stack_frame (selected_frame, -1, 1); | |
1672 | free (serial_port_name); | |
1673 | } | |
1674 | ||
1675 | static void | |
1676 | mips_open (name, from_tty) | |
1677 | char *name; | |
1678 | int from_tty; | |
1679 | { | |
1680 | common_open (&mips_ops, name, from_tty, MON_IDT, TARGET_MONITOR_PROMPT); | |
1681 | } | |
1682 | ||
1683 | static void | |
1684 | pmon_open (name, from_tty) | |
1685 | char *name; | |
1686 | int from_tty; | |
1687 | { | |
1688 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1689 | } | |
1690 | ||
1691 | static void | |
1692 | ddb_open (name, from_tty) | |
1693 | char *name; | |
1694 | int from_tty; | |
1695 | { | |
1696 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1697 | } | |
1698 | ||
1699 | static void | |
1700 | lsi_open (name, from_tty) | |
1701 | char *name; | |
1702 | int from_tty; | |
1703 | { | |
1704 | int i; | |
1705 | ||
1706 | /* Clear the LSI breakpoint table. */ | |
1707 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1708 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1709 | |
c906108c SS |
1710 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1711 | } | |
1712 | ||
1713 | /* Close a connection to the remote board. */ | |
1714 | ||
1715 | static void | |
1716 | mips_close (quitting) | |
1717 | int quitting; | |
1718 | { | |
1719 | if (mips_is_open) | |
1720 | { | |
1721 | /* Get the board out of remote debugging mode. */ | |
1722 | (void) mips_exit_debug (); | |
1723 | ||
1724 | close_ports (); | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | /* Detach from the remote board. */ | |
1729 | ||
1730 | static void | |
1731 | mips_detach (args, from_tty) | |
1732 | char *args; | |
1733 | int from_tty; | |
1734 | { | |
1735 | if (args) | |
1736 | error ("Argument given to \"detach\" when remotely debugging."); | |
1737 | ||
1738 | pop_target (); | |
1739 | ||
1740 | mips_close (1); | |
1741 | ||
1742 | if (from_tty) | |
1743 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1744 | } | |
1745 | ||
1746 | /* Tell the target board to resume. This does not wait for a reply | |
1747 | from the board, except in the case of single-stepping on LSI boards, | |
1748 | where PMON does return a reply. */ | |
1749 | ||
1750 | static void | |
1751 | mips_resume (pid, step, siggnal) | |
1752 | int pid, step; | |
1753 | enum target_signal siggnal; | |
1754 | { | |
1755 | int err; | |
1756 | ||
1757 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1758 | a single step, so we wait for that. */ | |
1759 | mips_request (step ? 's' : 'c', | |
1760 | (unsigned int) 1, | |
1761 | (unsigned int) siggnal, | |
1762 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, | |
1763 | mips_receive_wait, NULL); | |
1764 | } | |
1765 | ||
1766 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1767 | the MIPS protocol uses for the signal. */ | |
1768 | enum target_signal | |
1769 | mips_signal_from_protocol (sig) | |
1770 | int sig; | |
1771 | { | |
1772 | /* We allow a few more signals than the IDT board actually returns, on | |
1773 | the theory that there is at least *some* hope that perhaps the numbering | |
1774 | for these signals is widely agreed upon. */ | |
1775 | if (sig <= 0 | |
1776 | || sig > 31) | |
1777 | return TARGET_SIGNAL_UNKNOWN; | |
1778 | ||
1779 | /* Don't want to use target_signal_from_host because we are converting | |
1780 | from MIPS signal numbers, not host ones. Our internal numbers | |
1781 | match the MIPS numbers for the signals the board can return, which | |
1782 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1783 | return (enum target_signal) sig; | |
1784 | } | |
1785 | ||
1786 | /* Wait until the remote stops, and return a wait status. */ | |
1787 | ||
1788 | static int | |
1789 | mips_wait (pid, status) | |
1790 | int pid; | |
1791 | struct target_waitstatus *status; | |
1792 | { | |
1793 | int rstatus; | |
1794 | int err; | |
1795 | char buff[DATA_MAXLEN]; | |
1796 | int rpc, rfp, rsp; | |
1797 | char flags[20]; | |
1798 | int nfields; | |
1799 | int i; | |
1800 | ||
1801 | interrupt_count = 0; | |
1802 | hit_watchpoint = 0; | |
1803 | ||
1804 | /* If we have not sent a single step or continue command, then the | |
1805 | board is waiting for us to do something. Return a status | |
1806 | indicating that it is stopped. */ | |
c5aa993b | 1807 | if (!mips_need_reply) |
c906108c SS |
1808 | { |
1809 | status->kind = TARGET_WAITKIND_STOPPED; | |
1810 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1815 | mips_wait_flag = 1; | |
1816 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1817 | buff); | |
1818 | mips_wait_flag = 0; | |
1819 | if (err) | |
1820 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1821 | ||
1822 | /* On returning from a continue, the PMON monitor seems to start | |
1823 | echoing back the messages we send prior to sending back the | |
1824 | ACK. The code can cope with this, but to try and avoid the | |
1825 | unnecessary serial traffic, and "spurious" characters displayed | |
1826 | to the user, we cheat and reset the debug protocol. The problems | |
1827 | seems to be caused by a check on the number of arguments, and the | |
1828 | command length, within the monitor causing it to echo the command | |
1829 | as a bad packet. */ | |
1830 | if (mips_monitor == MON_PMON) | |
1831 | { | |
1832 | mips_exit_debug (); | |
1833 | mips_enter_debug (); | |
1834 | } | |
1835 | ||
1836 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1837 | ||
1838 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", | |
1839 | &rpc, &rfp, &rsp, flags); | |
1840 | if (nfields >= 3) | |
1841 | { | |
1842 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1843 | ||
1844 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc); | |
1845 | supply_register (PC_REGNUM, buf); | |
1846 | ||
1847 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp); | |
c5aa993b | 1848 | supply_register (30, buf); /* This register they are avoiding and so it is unnamed */ |
c906108c SS |
1849 | |
1850 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp); | |
1851 | supply_register (SP_REGNUM, buf); | |
1852 | ||
1853 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0); | |
1854 | supply_register (FP_REGNUM, buf); | |
1855 | ||
1856 | if (nfields == 9) | |
1857 | { | |
1858 | int i; | |
1859 | ||
1860 | for (i = 0; i <= 2; i++) | |
1861 | if (flags[i] == 'r' || flags[i] == 'w') | |
1862 | hit_watchpoint = 1; | |
1863 | else if (flags[i] == '\000') | |
1864 | break; | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | if (strcmp (target_shortname, "lsi") == 0) | |
1869 | { | |
1870 | #if 0 | |
1871 | /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint. | |
c5aa993b JM |
1872 | Right now, PMON doesn't give us enough information to determine which |
1873 | breakpoint we hit. So we have to look up the PC in our own table | |
1874 | of breakpoints, and if found, assume it's just a normal instruction | |
1875 | fetch breakpoint, not a data watchpoint. FIXME when PMON | |
1876 | provides some way to tell us what type of breakpoint it is. */ | |
c906108c | 1877 | int i; |
c5aa993b | 1878 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1879 | |
1880 | hit_watchpoint = 1; | |
1881 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1882 | { | |
1883 | if (lsi_breakpoints[i].addr == pc | |
1884 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1885 | { | |
1886 | hit_watchpoint = 0; | |
1887 | break; | |
1888 | } | |
1889 | } | |
1890 | #else | |
1891 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1892 | 0x1 c 0x0 0x57f 0x1 |
1893 | The return packet from an ordinary breakpoint doesn't have the | |
1894 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1895 | if (nfields == 1 && rpc == 1) |
1896 | hit_watchpoint = 1; | |
1897 | #endif | |
1898 | } | |
1899 | ||
1900 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1901 | SPP_SIGTRAP 5 breakpoint |
1902 | SPP_SIGINT 2 | |
1903 | SPP_SIGSEGV 11 | |
1904 | SPP_SIGBUS 10 | |
1905 | SPP_SIGILL 4 | |
1906 | SPP_SIGFPE 8 | |
1907 | SPP_SIGTERM 15 */ | |
c906108c SS |
1908 | |
1909 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1910 | and so on, because the constants we want here are determined by the | |
1911 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1912 | if ((rstatus & 0xff) == 0) | |
1913 | { | |
1914 | status->kind = TARGET_WAITKIND_EXITED; | |
1915 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1916 | } | |
1917 | else if ((rstatus & 0xff) == 0x7f) | |
1918 | { | |
1919 | status->kind = TARGET_WAITKIND_STOPPED; | |
1920 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1921 | ||
1922 | /* If the stop PC is in the _exit function, assume | |
1923 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1924 | is not a normal breakpoint. */ |
c906108c SS |
1925 | if (strcmp (target_shortname, "lsi") == 0) |
1926 | { | |
1927 | char *func_name; | |
1928 | CORE_ADDR func_start; | |
c5aa993b | 1929 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1930 | |
1931 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1932 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1933 | && func_start == pc) | |
1934 | status->kind = TARGET_WAITKIND_EXITED; | |
1935 | } | |
1936 | } | |
1937 | else | |
1938 | { | |
1939 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1940 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1941 | } | |
1942 | ||
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | /* We have to map between the register numbers used by gdb and the | |
1947 | register numbers used by the debugging protocol. This function | |
1948 | assumes that we are using tm-mips.h. */ | |
1949 | ||
1950 | #define REGNO_OFFSET 96 | |
1951 | ||
1952 | static int | |
1953 | mips_map_regno (regno) | |
1954 | int regno; | |
1955 | { | |
1956 | if (regno < 32) | |
1957 | return regno; | |
1958 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
1959 | return regno - FP0_REGNUM + 32; | |
1960 | switch (regno) | |
1961 | { | |
1962 | case PC_REGNUM: | |
1963 | return REGNO_OFFSET + 0; | |
1964 | case CAUSE_REGNUM: | |
1965 | return REGNO_OFFSET + 1; | |
1966 | case HI_REGNUM: | |
1967 | return REGNO_OFFSET + 2; | |
1968 | case LO_REGNUM: | |
1969 | return REGNO_OFFSET + 3; | |
1970 | case FCRCS_REGNUM: | |
1971 | return REGNO_OFFSET + 4; | |
1972 | case FCRIR_REGNUM: | |
1973 | return REGNO_OFFSET + 5; | |
1974 | default: | |
1975 | /* FIXME: Is there a way to get the status register? */ | |
1976 | return 0; | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | /* Fetch the remote registers. */ | |
1981 | ||
1982 | static void | |
1983 | mips_fetch_registers (regno) | |
1984 | int regno; | |
1985 | { | |
1986 | unsigned LONGEST val; | |
1987 | int err; | |
1988 | ||
1989 | if (regno == -1) | |
1990 | { | |
1991 | for (regno = 0; regno < NUM_REGS; regno++) | |
1992 | mips_fetch_registers (regno); | |
1993 | return; | |
1994 | } | |
1995 | ||
1996 | if (regno == FP_REGNUM || regno == ZERO_REGNUM) | |
1997 | /* FP_REGNUM on the mips is a hack which is just supposed to read | |
1998 | zero (see also mips-nat.c). */ | |
1999 | val = 0; | |
2000 | else | |
2001 | { | |
2002 | /* If PMON doesn't support this register, don't waste serial | |
2003 | bandwidth trying to read it. */ | |
2004 | int pmon_reg = mips_map_regno (regno); | |
2005 | if (regno != 0 && pmon_reg == 0) | |
2006 | val = 0; | |
2007 | else | |
2008 | { | |
2009 | /* Unfortunately the PMON version in the Vr4300 board has been | |
2010 | compiled without the 64bit register access commands. This | |
2011 | means we cannot get hold of the full register width. */ | |
2012 | if (mips_monitor == MON_DDB) | |
c5aa993b JM |
2013 | val = (unsigned) mips_request ('t', (unsigned int) pmon_reg, |
2014 | (unsigned int) 0, &err, mips_receive_wait, NULL); | |
c906108c SS |
2015 | else |
2016 | val = mips_request ('r', (unsigned int) pmon_reg, | |
c5aa993b | 2017 | (unsigned int) 0, &err, mips_receive_wait, NULL); |
c906108c SS |
2018 | if (err) |
2019 | mips_error ("Can't read register %d: %s", regno, | |
2020 | safe_strerror (errno)); | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | { | |
2025 | char buf[MAX_REGISTER_RAW_SIZE]; | |
2026 | ||
2027 | /* We got the number the register holds, but gdb expects to see a | |
2028 | value in the target byte ordering. */ | |
2029 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val); | |
2030 | supply_register (regno, buf); | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | /* Prepare to store registers. The MIPS protocol can store individual | |
2035 | registers, so this function doesn't have to do anything. */ | |
2036 | ||
2037 | static void | |
2038 | mips_prepare_to_store () | |
2039 | { | |
2040 | } | |
2041 | ||
2042 | /* Store remote register(s). */ | |
2043 | ||
2044 | static void | |
2045 | mips_store_registers (regno) | |
2046 | int regno; | |
2047 | { | |
2048 | int err; | |
2049 | ||
2050 | if (regno == -1) | |
2051 | { | |
2052 | for (regno = 0; regno < NUM_REGS; regno++) | |
2053 | mips_store_registers (regno); | |
2054 | return; | |
2055 | } | |
2056 | ||
2057 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
2058 | read_register (regno), | |
2059 | &err, mips_receive_wait, NULL); | |
2060 | if (err) | |
2061 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
2062 | } | |
2063 | ||
2064 | /* Fetch a word from the target board. */ | |
2065 | ||
c5aa993b | 2066 | static unsigned int |
c906108c SS |
2067 | mips_fetch_word (addr) |
2068 | CORE_ADDR addr; | |
2069 | { | |
2070 | unsigned int val; | |
2071 | int err; | |
2072 | ||
2073 | /* FIXME! addr was cast to uint! */ | |
2074 | val = mips_request ('d', addr, (unsigned int) 0, &err, | |
2075 | mips_receive_wait, NULL); | |
2076 | if (err) | |
2077 | { | |
2078 | /* Data space failed; try instruction space. */ | |
2079 | /* FIXME! addr was cast to uint! */ | |
2080 | val = mips_request ('i', addr, (unsigned int) 0, &err, | |
2081 | mips_receive_wait, NULL); | |
2082 | if (err) | |
c5aa993b JM |
2083 | mips_error ("Can't read address 0x%s: %s", |
2084 | paddr_nz (addr), safe_strerror (errno)); | |
c906108c SS |
2085 | } |
2086 | return val; | |
2087 | } | |
2088 | ||
2089 | /* Store a word to the target board. Returns errno code or zero for | |
2090 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2091 | memory location there. */ | |
2092 | ||
2093 | /* FIXME! make sure only 32-bit quantities get stored! */ | |
2094 | static int | |
2095 | mips_store_word (addr, val, old_contents) | |
2096 | CORE_ADDR addr; | |
2097 | unsigned int val; | |
2098 | char *old_contents; | |
2099 | { | |
2100 | int err; | |
2101 | unsigned int oldcontents; | |
2102 | ||
2103 | oldcontents = mips_request ('D', addr, (unsigned int) val, | |
2104 | &err, | |
2105 | mips_receive_wait, NULL); | |
2106 | if (err) | |
2107 | { | |
2108 | /* Data space failed; try instruction space. */ | |
2109 | oldcontents = mips_request ('I', addr, | |
2110 | (unsigned int) val, &err, | |
2111 | mips_receive_wait, NULL); | |
2112 | if (err) | |
2113 | return errno; | |
2114 | } | |
2115 | if (old_contents != NULL) | |
2116 | store_unsigned_integer (old_contents, 4, oldcontents); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2121 | transferring to or from debugger address MYADDR. Write to inferior | |
2122 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2123 | read; 0 for error. Note that protocol gives us the correct value | |
2124 | for a longword, since it transfers values in ASCII. We want the | |
2125 | byte values, so we have to swap the longword values. */ | |
2126 | ||
2127 | static int | |
2128 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
2129 | CORE_ADDR memaddr; | |
2130 | char *myaddr; | |
2131 | int len; | |
2132 | int write; | |
2133 | struct target_ops *ignore; | |
2134 | { | |
2135 | register int i; | |
2136 | /* Round starting address down to longword boundary. */ | |
c5aa993b | 2137 | register CORE_ADDR addr = memaddr & ~3; |
c906108c SS |
2138 | /* Round ending address up; get number of longwords that makes. */ |
2139 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
2140 | /* Allocate buffer of that many longwords. */ | |
2141 | register char *buffer = alloca (count * 4); | |
2142 | ||
2143 | int status; | |
2144 | ||
2145 | if (write) | |
2146 | { | |
2147 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2148 | if (addr != memaddr || len < 4) | |
2149 | { | |
2150 | /* Need part of initial word -- fetch it. */ | |
2151 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); | |
2152 | } | |
2153 | ||
2154 | if (count > 1) | |
2155 | { | |
2156 | /* Need part of last word -- fetch it. FIXME: we do this even | |
2157 | if we don't need it. */ | |
2158 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
2159 | mips_fetch_word (addr + (count - 1) * 4)); | |
2160 | } | |
2161 | ||
2162 | /* Copy data to be written over corresponding part of buffer */ | |
2163 | ||
2164 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2165 | ||
2166 | /* Write the entire buffer. */ | |
2167 | ||
2168 | for (i = 0; i < count; i++, addr += 4) | |
2169 | { | |
2170 | status = mips_store_word (addr, | |
c5aa993b | 2171 | extract_unsigned_integer (&buffer[i * 4], 4), |
c906108c SS |
2172 | NULL); |
2173 | /* Report each kilobyte (we download 32-bit words at a time) */ | |
c5aa993b | 2174 | if (i % 256 == 255) |
c906108c SS |
2175 | { |
2176 | printf_unfiltered ("*"); | |
2177 | gdb_flush (gdb_stdout); | |
2178 | } | |
2179 | if (status) | |
2180 | { | |
2181 | errno = status; | |
2182 | return 0; | |
2183 | } | |
2184 | /* FIXME: Do we want a QUIT here? */ | |
2185 | } | |
2186 | if (count >= 256) | |
2187 | printf_unfiltered ("\n"); | |
2188 | } | |
2189 | else | |
2190 | { | |
2191 | /* Read all the longwords */ | |
2192 | for (i = 0; i < count; i++, addr += 4) | |
2193 | { | |
c5aa993b | 2194 | store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr)); |
c906108c SS |
2195 | QUIT; |
2196 | } | |
2197 | ||
2198 | /* Copy appropriate bytes out of the buffer. */ | |
2199 | memcpy (myaddr, buffer + (memaddr & 3), len); | |
2200 | } | |
2201 | return len; | |
2202 | } | |
2203 | ||
2204 | /* Print info on this target. */ | |
2205 | ||
2206 | static void | |
2207 | mips_files_info (ignore) | |
2208 | struct target_ops *ignore; | |
2209 | { | |
2210 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2211 | } | |
2212 | ||
2213 | /* Kill the process running on the board. This will actually only | |
2214 | work if we are doing remote debugging over the console input. I | |
2215 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2216 | right port, we could interrupt the process with a break signal. */ | |
2217 | ||
2218 | static void | |
2219 | mips_kill () | |
2220 | { | |
2221 | if (!mips_wait_flag) | |
2222 | return; | |
2223 | ||
2224 | interrupt_count++; | |
2225 | ||
2226 | if (interrupt_count >= 2) | |
2227 | { | |
2228 | interrupt_count = 0; | |
2229 | ||
2230 | target_terminal_ours (); | |
2231 | ||
2232 | if (query ("Interrupted while waiting for the program.\n\ | |
2233 | Give up (and stop debugging it)? ")) | |
2234 | { | |
2235 | /* Clean up in such a way that mips_close won't try to talk to the | |
2236 | board (it almost surely won't work since we weren't able to talk to | |
2237 | it). */ | |
2238 | mips_wait_flag = 0; | |
c5aa993b | 2239 | close_ports (); |
c906108c SS |
2240 | |
2241 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2242 | target_mourn_inferior (); | |
2243 | ||
2244 | return_to_top_level (RETURN_QUIT); | |
2245 | } | |
2246 | ||
2247 | target_terminal_inferior (); | |
2248 | } | |
2249 | ||
2250 | if (remote_debug > 0) | |
2251 | printf_unfiltered ("Sending break\n"); | |
2252 | ||
2253 | SERIAL_SEND_BREAK (mips_desc); | |
2254 | ||
2255 | #if 0 | |
2256 | if (mips_is_open) | |
2257 | { | |
2258 | char cc; | |
2259 | ||
2260 | /* Send a ^C. */ | |
2261 | cc = '\003'; | |
2262 | SERIAL_WRITE (mips_desc, &cc, 1); | |
2263 | sleep (1); | |
2264 | target_mourn_inferior (); | |
2265 | } | |
2266 | #endif | |
2267 | } | |
2268 | ||
2269 | /* Start running on the target board. */ | |
2270 | ||
2271 | static void | |
2272 | mips_create_inferior (execfile, args, env) | |
2273 | char *execfile; | |
2274 | char *args; | |
2275 | char **env; | |
2276 | { | |
2277 | CORE_ADDR entry_pt; | |
2278 | ||
2279 | if (args && *args) | |
2280 | { | |
2281 | warning ("\ | |
2282 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
2283 | /* And don't try to use them on the next "run" command. */ | |
2284 | execute_command ("set args", 0); | |
2285 | } | |
2286 | ||
2287 | if (execfile == 0 || exec_bfd == 0) | |
2288 | error ("No executable file specified"); | |
2289 | ||
2290 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2291 | ||
2292 | init_wait_for_inferior (); | |
2293 | ||
2294 | /* FIXME: Should we set inferior_pid here? */ | |
2295 | ||
2296 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
2297 | } | |
2298 | ||
2299 | /* Clean up after a process. Actually nothing to do. */ | |
2300 | ||
2301 | static void | |
2302 | mips_mourn_inferior () | |
2303 | { | |
2304 | if (current_ops != NULL) | |
2305 | unpush_target (current_ops); | |
2306 | generic_mourn_inferior (); | |
2307 | } | |
2308 | \f | |
2309 | /* We can write a breakpoint and read the shadow contents in one | |
2310 | operation. */ | |
2311 | ||
2312 | /* Insert a breakpoint. On targets that don't have built-in breakpoint | |
2313 | support, we read the contents of the target location and stash it, | |
2314 | then overwrite it with a breakpoint instruction. ADDR is the target | |
2315 | location in the target machine. CONTENTS_CACHE is a pointer to | |
2316 | memory allocated for saving the target contents. It is guaranteed | |
2317 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
2318 | is accomplished via BREAKPOINT_MAX). */ | |
2319 | ||
2320 | static int | |
2321 | mips_insert_breakpoint (addr, contents_cache) | |
2322 | CORE_ADDR addr; | |
2323 | char *contents_cache; | |
2324 | { | |
2325 | if (monitor_supports_breakpoints) | |
2326 | return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH); | |
2327 | else | |
2328 | return memory_insert_breakpoint (addr, contents_cache); | |
2329 | } | |
2330 | ||
2331 | static int | |
2332 | mips_remove_breakpoint (addr, contents_cache) | |
2333 | CORE_ADDR addr; | |
2334 | char *contents_cache; | |
2335 | { | |
2336 | if (monitor_supports_breakpoints) | |
2337 | return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH); | |
2338 | else | |
2339 | return memory_remove_breakpoint (addr, contents_cache); | |
2340 | } | |
2341 | ||
c5aa993b | 2342 | #if 0 /* currently not used */ |
c906108c SS |
2343 | /* PMON does not currently provide support for the debug mode 'b' |
2344 | commands to manipulate breakpoints. However, if we wanted to use | |
2345 | the monitor breakpoints (rather than the GDB BREAK_INSN version) | |
2346 | then this code performs the work needed to leave debug mode, | |
2347 | set/clear the breakpoint, and then return to debug mode. */ | |
2348 | ||
c5aa993b | 2349 | #define PMON_MAX_BP (33) /* 32 SW, 1 HW */ |
c906108c SS |
2350 | static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP]; |
2351 | /* NOTE: The code relies on this vector being zero-initialised by the system */ | |
2352 | ||
2353 | static int | |
2354 | pmon_insert_breakpoint (addr, contents_cache) | |
2355 | CORE_ADDR addr; | |
2356 | char *contents_cache; | |
2357 | { | |
2358 | int status; | |
2359 | ||
2360 | if (monitor_supports_breakpoints) | |
2361 | { | |
c5aa993b | 2362 | char tbuff[12]; /* space for breakpoint command */ |
c906108c SS |
2363 | int bpnum; |
2364 | CORE_ADDR bpaddr; | |
2365 | ||
2366 | /* PMON does not support debug level breakpoint set/remove: */ | |
2367 | if (mips_exit_debug ()) | |
c5aa993b | 2368 | mips_error ("Failed to exit debug mode"); |
c906108c SS |
2369 | |
2370 | sprintf (tbuff, "b %08x\r", addr); | |
2371 | mips_send_command (tbuff, 0); | |
2372 | ||
2373 | mips_expect ("Bpt "); | |
2374 | ||
2375 | if (!mips_getstring (tbuff, 2)) | |
c5aa993b JM |
2376 | return 1; |
2377 | tbuff[2] = '\0'; /* terminate the string */ | |
c906108c | 2378 | if (sscanf (tbuff, "%d", &bpnum) != 1) |
c5aa993b JM |
2379 | { |
2380 | fprintf_unfiltered (gdb_stderr, | |
2381 | "Invalid decimal breakpoint number from target: %s\n", tbuff); | |
2382 | return 1; | |
2383 | } | |
c906108c SS |
2384 | |
2385 | mips_expect (" = "); | |
2386 | ||
2387 | /* Lead in the hex number we are expecting: */ | |
2388 | tbuff[0] = '0'; | |
2389 | tbuff[1] = 'x'; | |
2390 | ||
2391 | /* FIXME!! only 8 bytes! need to expand for Bfd64; | |
2392 | which targets return 64-bit addresses? PMON returns only 32! */ | |
2393 | if (!mips_getstring (&tbuff[2], 8)) | |
c5aa993b JM |
2394 | return 1; |
2395 | tbuff[10] = '\0'; /* terminate the string */ | |
c906108c SS |
2396 | |
2397 | if (sscanf (tbuff, "0x%08x", &bpaddr) != 1) | |
c5aa993b JM |
2398 | { |
2399 | fprintf_unfiltered (gdb_stderr, | |
2400 | "Invalid hex address from target: %s\n", tbuff); | |
2401 | return 1; | |
2402 | } | |
c906108c SS |
2403 | |
2404 | if (bpnum >= PMON_MAX_BP) | |
c5aa993b JM |
2405 | { |
2406 | fprintf_unfiltered (gdb_stderr, | |
c906108c | 2407 | "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n", |
c5aa993b JM |
2408 | bpnum, PMON_MAX_BP - 1); |
2409 | return 1; | |
2410 | } | |
c906108c SS |
2411 | |
2412 | if (bpaddr != addr) | |
c5aa993b | 2413 | fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr); |
c906108c SS |
2414 | |
2415 | mips_pmon_bp_info[bpnum] = bpaddr; | |
2416 | ||
2417 | mips_expect ("\r\n"); | |
2418 | mips_expect (mips_monitor_prompt); | |
2419 | ||
2420 | mips_enter_debug (); | |
2421 | ||
2422 | return 0; | |
2423 | } | |
2424 | ||
2425 | return mips_store_word (addr, BREAK_INSN, contents_cache); | |
2426 | } | |
2427 | ||
2428 | static int | |
2429 | pmon_remove_breakpoint (addr, contents_cache) | |
2430 | CORE_ADDR addr; | |
2431 | char *contents_cache; | |
2432 | { | |
2433 | if (monitor_supports_breakpoints) | |
2434 | { | |
2435 | int bpnum; | |
c5aa993b | 2436 | char tbuff[7]; /* enough for delete breakpoint command */ |
c906108c SS |
2437 | |
2438 | for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++) | |
c5aa993b JM |
2439 | if (mips_pmon_bp_info[bpnum] == addr) |
2440 | break; | |
c906108c SS |
2441 | |
2442 | if (bpnum >= PMON_MAX_BP) | |
c5aa993b JM |
2443 | { |
2444 | fprintf_unfiltered (gdb_stderr, | |
2445 | "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n", | |
2446 | paddr_nz (addr)); | |
2447 | return 1; | |
2448 | } | |
c906108c SS |
2449 | |
2450 | if (mips_exit_debug ()) | |
c5aa993b | 2451 | mips_error ("Failed to exit debug mode"); |
c906108c SS |
2452 | |
2453 | sprintf (tbuff, "db %02d\r", bpnum); | |
2454 | ||
2455 | mips_send_command (tbuff, -1); | |
2456 | /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not | |
2457 | set" message will be returned. */ | |
2458 | ||
2459 | mips_enter_debug (); | |
2460 | ||
2461 | return 0; | |
2462 | } | |
2463 | ||
2464 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); | |
2465 | } | |
2466 | #endif | |
2467 | ||
2468 | ||
2469 | /* Tell whether this target can support a hardware breakpoint. CNT | |
2470 | is the number of hardware breakpoints already installed. This | |
2471 | implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */ | |
2472 | ||
2473 | int | |
2474 | remote_mips_can_use_hardware_watchpoint (cnt) | |
2475 | int cnt; | |
2476 | { | |
c5aa993b | 2477 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2478 | } |
2479 | ||
2480 | ||
2481 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2482 | This is used for memory ref breakpoints. */ | |
2483 | ||
2484 | static unsigned long | |
2485 | calculate_mask (addr, len) | |
2486 | CORE_ADDR addr; | |
2487 | int len; | |
2488 | { | |
2489 | unsigned long mask; | |
2490 | int i; | |
2491 | ||
2492 | mask = addr ^ (addr + len - 1); | |
2493 | ||
2494 | for (i = 32; i >= 0; i--) | |
2495 | if (mask == 0) | |
2496 | break; | |
2497 | else | |
2498 | mask >>= 1; | |
2499 | ||
2500 | mask = (unsigned long) 0xffffffff >> i; | |
2501 | ||
2502 | return mask; | |
2503 | } | |
2504 | ||
2505 | ||
2506 | /* Insert a hardware breakpoint. This works only on LSI targets, which | |
2507 | implement ordinary breakpoints using hardware facilities. */ | |
2508 | ||
2509 | int | |
2510 | remote_mips_insert_hw_breakpoint (addr, contents_cache) | |
2511 | CORE_ADDR addr; | |
2512 | char *contents_cache; | |
2513 | { | |
2514 | if (strcmp (target_shortname, "lsi") == 0) | |
2515 | return mips_insert_breakpoint (addr, contents_cache); | |
2516 | else | |
2517 | return -1; | |
2518 | } | |
2519 | ||
2520 | ||
2521 | /* Remove a hardware breakpoint. This works only on LSI targets, which | |
2522 | implement ordinary breakpoints using hardware facilities. */ | |
2523 | ||
2524 | int | |
2525 | remote_mips_remove_hw_breakpoint (addr, contents_cache) | |
2526 | CORE_ADDR addr; | |
2527 | char *contents_cache; | |
2528 | { | |
2529 | if (strcmp (target_shortname, "lsi") == 0) | |
2530 | return mips_remove_breakpoint (addr, contents_cache); | |
2531 | else | |
2532 | return -1; | |
2533 | } | |
2534 | ||
2535 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 | |
2536 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
2537 | watchpoint. */ | |
2538 | ||
2539 | int | |
2540 | remote_mips_set_watchpoint (addr, len, type) | |
2541 | CORE_ADDR addr; | |
2542 | int len; | |
2543 | int type; | |
2544 | { | |
2545 | if (set_breakpoint (addr, len, type)) | |
2546 | return -1; | |
2547 | ||
2548 | return 0; | |
2549 | } | |
2550 | ||
2551 | int | |
2552 | remote_mips_remove_watchpoint (addr, len, type) | |
2553 | CORE_ADDR addr; | |
2554 | int len; | |
2555 | int type; | |
2556 | { | |
2557 | if (clear_breakpoint (addr, len, type)) | |
2558 | return -1; | |
2559 | ||
2560 | return 0; | |
2561 | } | |
2562 | ||
2563 | int | |
2564 | remote_mips_stopped_by_watchpoint () | |
2565 | { | |
2566 | return hit_watchpoint; | |
2567 | } | |
2568 | ||
2569 | ||
2570 | /* Insert a breakpoint. */ | |
2571 | ||
2572 | static int | |
2573 | set_breakpoint (addr, len, type) | |
2574 | CORE_ADDR addr; | |
2575 | int len; | |
2576 | enum break_type type; | |
2577 | { | |
2578 | return common_breakpoint (1, addr, len, type); | |
2579 | } | |
2580 | ||
2581 | ||
2582 | /* Clear a breakpoint. */ | |
2583 | ||
2584 | static int | |
2585 | clear_breakpoint (addr, len, type) | |
2586 | CORE_ADDR addr; | |
2587 | int len; | |
2588 | enum break_type type; | |
2589 | { | |
2590 | return common_breakpoint (0, addr, len, type); | |
2591 | } | |
2592 | ||
2593 | ||
2594 | /* Check the error code from the return packet for an LSI breakpoint | |
2595 | command. If there's no error, just return 0. If it's a warning, | |
2596 | print the warning text and return 0. If it's an error, print | |
2597 | the error text and return 1. <ADDR> is the address of the breakpoint | |
2598 | that was being set. <RERRFLG> is the error code returned by PMON. | |
2599 | This is a helper function for common_breakpoint. */ | |
2600 | ||
2601 | static int | |
2602 | check_lsi_error (addr, rerrflg) | |
2603 | CORE_ADDR addr; | |
2604 | int rerrflg; | |
2605 | { | |
2606 | struct lsi_error *err; | |
2607 | char *saddr = paddr_nz (addr); /* printable address string */ | |
2608 | ||
2609 | if (rerrflg == 0) /* no error */ | |
2610 | return 0; | |
2611 | ||
2612 | /* Warnings can be ORed together, so check them all. */ | |
2613 | if (rerrflg & W_WARN) | |
2614 | { | |
2615 | if (monitor_warnings) | |
2616 | { | |
2617 | int found = 0; | |
2618 | for (err = lsi_warning_table; err->code != 0; err++) | |
2619 | { | |
2620 | if ((err->code & rerrflg) == err->code) | |
2621 | { | |
2622 | found = 1; | |
2623 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2624 | "common_breakpoint (0x%s): Warning: %s\n", |
c906108c SS |
2625 | saddr, |
2626 | err->string); | |
2627 | } | |
2628 | } | |
2629 | if (!found) | |
2630 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2631 | "common_breakpoint (0x%s): Unknown warning: 0x%x\n", |
c906108c SS |
2632 | saddr, |
2633 | rerrflg); | |
2634 | } | |
2635 | return 0; | |
2636 | } | |
2637 | ||
2638 | /* Errors are unique, i.e. can't be ORed together. */ | |
2639 | for (err = lsi_error_table; err->code != 0; err++) | |
2640 | { | |
2641 | if ((err->code & rerrflg) == err->code) | |
2642 | { | |
2643 | fprintf_unfiltered (gdb_stderr, | |
2644 | "common_breakpoint (0x%s): Error: %s\n", | |
2645 | saddr, | |
2646 | err->string); | |
2647 | return 1; | |
2648 | } | |
2649 | } | |
2650 | fprintf_unfiltered (gdb_stderr, | |
2651 | "common_breakpoint (0x%s): Unknown error: 0x%x\n", | |
2652 | saddr, | |
2653 | rerrflg); | |
2654 | return 1; | |
2655 | } | |
2656 | ||
2657 | ||
2658 | /* This routine sends a breakpoint command to the remote target. | |
2659 | ||
2660 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2661 | <ADDR> is the address of the breakpoint. | |
2662 | <LEN> the length of the region to break on. | |
2663 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2664 | 0 = write (BREAK_WRITE) |
2665 | 1 = read (BREAK_READ) | |
2666 | 2 = read/write (BREAK_ACCESS) | |
2667 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2668 | |
2669 | Return 0 if successful; otherwise 1. */ | |
2670 | ||
2671 | static int | |
2672 | common_breakpoint (set, addr, len, type) | |
2673 | int set; | |
2674 | CORE_ADDR addr; | |
2675 | int len; | |
2676 | enum break_type type; | |
2677 | { | |
2678 | char buf[DATA_MAXLEN + 1]; | |
2679 | char cmd, rcmd; | |
2680 | int rpid, rerrflg, rresponse, rlen; | |
2681 | int nfields; | |
2682 | ||
2683 | addr = ADDR_BITS_REMOVE (addr); | |
2684 | ||
2685 | if (mips_monitor == MON_LSI) | |
2686 | { | |
c5aa993b | 2687 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2688 | { |
2689 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2690 | <pid> 'b' <bptn> 0x0 |
2691 | reply: | |
2692 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2693 | |
2694 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2695 | Possible return codes: OK, E_BPT. */ | |
2696 | ||
2697 | int i; | |
2698 | ||
2699 | /* Search for the breakpoint in the table. */ | |
2700 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2701 | if (lsi_breakpoints[i].type == type | |
2702 | && lsi_breakpoints[i].addr == addr | |
2703 | && lsi_breakpoints[i].len == len) | |
2704 | break; | |
2705 | ||
2706 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2707 | if (i == MAX_LSI_BREAKPOINTS) | |
2708 | { | |
2709 | warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n", | |
2710 | paddr_nz (addr)); | |
2711 | return 1; | |
2712 | } | |
2713 | ||
2714 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2715 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2716 | mips_send_packet (buf, 1); | |
2717 | ||
2718 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2719 | buf[rlen] = '\0'; | |
2720 | ||
2721 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2722 | if (nfields != 2) | |
2723 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2724 | ||
2725 | return (check_lsi_error (addr, rerrflg)); | |
2726 | } | |
c5aa993b JM |
2727 | else |
2728 | /* set a breakpoint */ | |
c906108c SS |
2729 | { |
2730 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2731 | <pid> 'B' <addr> 0x0 |
2732 | reply: | |
2733 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2734 | |
2735 | The "set data breakpoint" command has this form: | |
2736 | ||
c5aa993b | 2737 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2738 | |
c5aa993b JM |
2739 | where: type= "0x1" = read |
2740 | "0x2" = write | |
2741 | "0x3" = access (read or write) | |
c906108c SS |
2742 | |
2743 | The reply returns two values: | |
c5aa993b JM |
2744 | bptn - a breakpoint number, which is a small integer with |
2745 | possible values of zero through 255. | |
2746 | code - an error return code, a value of zero indicates a | |
2747 | succesful completion, other values indicate various | |
2748 | errors and warnings. | |
2749 | ||
c906108c SS |
2750 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. |
2751 | ||
c5aa993b | 2752 | */ |
c906108c SS |
2753 | |
2754 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2755 | { | |
2756 | cmd = 'B'; | |
2757 | sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr)); | |
2758 | } | |
c5aa993b JM |
2759 | else |
2760 | /* watchpoint */ | |
c906108c SS |
2761 | { |
2762 | cmd = 'A'; | |
2763 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr), | |
c5aa993b | 2764 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), |
c906108c SS |
2765 | paddr_nz (addr + len - 1)); |
2766 | } | |
2767 | mips_send_packet (buf, 1); | |
2768 | ||
2769 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2770 | buf[rlen] = '\0'; | |
2771 | ||
2772 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2773 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2774 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
2775 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2776 | ||
2777 | if (rerrflg != 0) | |
2778 | if (check_lsi_error (addr, rerrflg)) | |
2779 | return 1; | |
2780 | ||
2781 | /* rresponse contains PMON's breakpoint number. Record the | |
2782 | information for this breakpoint so we can clear it later. */ | |
2783 | lsi_breakpoints[rresponse].type = type; | |
2784 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2785 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2786 | |
2787 | return 0; | |
2788 | } | |
2789 | } | |
2790 | else | |
2791 | { | |
2792 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2793 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2794 | <MASK> is a don't care mask for addresses. | |
2795 | <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch. | |
c906108c SS |
2796 | */ |
2797 | unsigned long mask; | |
2798 | ||
2799 | mask = calculate_mask (addr, len); | |
2800 | addr &= ~mask; | |
2801 | ||
c5aa993b JM |
2802 | if (set) /* set a breakpoint */ |
2803 | { | |
c906108c SS |
2804 | char *flags; |
2805 | switch (type) | |
2806 | { | |
c5aa993b | 2807 | case BREAK_WRITE: /* write */ |
c906108c SS |
2808 | flags = "w"; |
2809 | break; | |
c5aa993b | 2810 | case BREAK_READ: /* read */ |
c906108c SS |
2811 | flags = "r"; |
2812 | break; | |
c5aa993b | 2813 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2814 | flags = "rw"; |
2815 | break; | |
c5aa993b | 2816 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2817 | flags = "f"; |
2818 | break; | |
2819 | default: | |
2820 | abort (); | |
2821 | } | |
2822 | ||
2823 | cmd = 'B'; | |
2824 | sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr), | |
2825 | paddr_nz (mask), flags); | |
2826 | } | |
2827 | else | |
2828 | { | |
2829 | cmd = 'b'; | |
2830 | sprintf (buf, "0x0 b 0x%s", paddr_nz (addr)); | |
2831 | } | |
2832 | ||
2833 | mips_send_packet (buf, 1); | |
2834 | ||
2835 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2836 | buf[rlen] = '\0'; | |
2837 | ||
2838 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2839 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2840 | ||
2841 | if (nfields != 4 || rcmd != cmd) | |
2842 | mips_error ("common_breakpoint: Bad response from remote board: %s", | |
2843 | buf); | |
2844 | ||
2845 | if (rerrflg != 0) | |
2846 | { | |
2847 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2848 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2849 | if (mips_monitor == MON_DDB) | |
2850 | rresponse = rerrflg; | |
c5aa993b | 2851 | if (rresponse != 22) /* invalid argument */ |
c906108c | 2852 | fprintf_unfiltered (gdb_stderr, |
c5aa993b | 2853 | "common_breakpoint (0x%s): Got error: 0x%x\n", |
c906108c SS |
2854 | paddr_nz (addr), rresponse); |
2855 | return 1; | |
2856 | } | |
2857 | } | |
2858 | return 0; | |
2859 | } | |
2860 | \f | |
2861 | static void | |
2862 | send_srec (srec, len, addr) | |
2863 | char *srec; | |
2864 | int len; | |
2865 | CORE_ADDR addr; | |
2866 | { | |
2867 | while (1) | |
2868 | { | |
2869 | int ch; | |
2870 | ||
2871 | SERIAL_WRITE (mips_desc, srec, len); | |
2872 | ||
2873 | ch = mips_readchar (2); | |
2874 | ||
2875 | switch (ch) | |
2876 | { | |
2877 | case SERIAL_TIMEOUT: | |
2878 | error ("Timeout during download."); | |
2879 | break; | |
2880 | case 0x6: /* ACK */ | |
2881 | return; | |
2882 | case 0x15: /* NACK */ | |
2883 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr); | |
2884 | continue; | |
2885 | default: | |
2886 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2887 | } | |
2888 | } | |
2889 | } | |
2890 | ||
2891 | /* Download a binary file by converting it to S records. */ | |
2892 | ||
2893 | static void | |
2894 | mips_load_srec (args) | |
2895 | char *args; | |
2896 | { | |
2897 | bfd *abfd; | |
2898 | asection *s; | |
2899 | char *buffer, srec[1024]; | |
2900 | unsigned int i; | |
2901 | unsigned int srec_frame = 200; | |
2902 | int reclen; | |
2903 | static int hashmark = 1; | |
2904 | ||
2905 | buffer = alloca (srec_frame * 2 + 256); | |
2906 | ||
2907 | abfd = bfd_openr (args, 0); | |
2908 | if (!abfd) | |
2909 | { | |
2910 | printf_filtered ("Unable to open file %s\n", args); | |
2911 | return; | |
2912 | } | |
2913 | ||
2914 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2915 | { | |
2916 | printf_filtered ("File is not an object file\n"); | |
2917 | return; | |
2918 | } | |
2919 | ||
2920 | /* This actually causes a download in the IDT binary format: */ | |
2921 | mips_send_command (LOAD_CMD, 0); | |
2922 | ||
2923 | for (s = abfd->sections; s; s = s->next) | |
2924 | { | |
2925 | if (s->flags & SEC_LOAD) | |
2926 | { | |
2927 | unsigned int numbytes; | |
2928 | ||
2929 | /* FIXME! vma too small?? */ | |
2930 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
2931 | s->vma + s->_raw_size); | |
2932 | gdb_flush (gdb_stdout); | |
2933 | ||
2934 | for (i = 0; i < s->_raw_size; i += numbytes) | |
2935 | { | |
2936 | numbytes = min (srec_frame, s->_raw_size - i); | |
2937 | ||
2938 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2939 | ||
2940 | reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes); | |
2941 | send_srec (srec, reclen, s->vma + i); | |
2942 | ||
2943 | if (hashmark) | |
2944 | { | |
2945 | putchar_unfiltered ('#'); | |
2946 | gdb_flush (gdb_stdout); | |
2947 | } | |
2948 | ||
c5aa993b JM |
2949 | } /* Per-packet (or S-record) loop */ |
2950 | ||
c906108c | 2951 | putchar_unfiltered ('\n'); |
c5aa993b | 2952 | } /* Loadable sections */ |
c906108c | 2953 | } |
c5aa993b | 2954 | if (hashmark) |
c906108c | 2955 | putchar_unfiltered ('\n'); |
c5aa993b | 2956 | |
c906108c SS |
2957 | /* Write a type 7 terminator record. no data for a type 7, and there |
2958 | is no data, so len is 0. */ | |
2959 | ||
2960 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2961 | ||
2962 | send_srec (srec, reclen, abfd->start_address); | |
2963 | ||
2964 | SERIAL_FLUSH_INPUT (mips_desc); | |
2965 | } | |
2966 | ||
2967 | /* | |
2968 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
c5aa993b JM |
2969 | * time, each with it's own header and trailer line. |
2970 | * An srecord looks like this: | |
c906108c SS |
2971 | * |
2972 | * byte count-+ address | |
2973 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2974 | * | | | | |
2975 | * S01000006F6B692D746573742E73726563E4 | |
2976 | * S315000448600000000000000000FC00005900000000E9 | |
2977 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2978 | * S30B0004485A0000000000004E | |
2979 | * S70500040000F6 | |
c906108c | 2980 | * |
c5aa993b | 2981 | * S<type><length><address><data><checksum> |
c906108c SS |
2982 | * |
2983 | * Where | |
2984 | * - length | |
2985 | * is the number of bytes following upto the checksum. Note that | |
2986 | * this is not the number of chars following, since it takes two | |
2987 | * chars to represent a byte. | |
2988 | * - type | |
2989 | * is one of: | |
2990 | * 0) header record | |
2991 | * 1) two byte address data record | |
2992 | * 2) three byte address data record | |
2993 | * 3) four byte address data record | |
2994 | * 7) four byte address termination record | |
2995 | * 8) three byte address termination record | |
2996 | * 9) two byte address termination record | |
2997 | * | |
2998 | * - address | |
2999 | * is the start address of the data following, or in the case of | |
3000 | * a termination record, the start address of the image | |
3001 | * - data | |
3002 | * is the data. | |
3003 | * - checksum | |
c5aa993b | 3004 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
3005 | * upwards, modulo 256 and subtracted from 255. |
3006 | * | |
3007 | * This routine returns the length of the S-record. | |
3008 | * | |
3009 | */ | |
3010 | ||
3011 | static int | |
3012 | mips_make_srec (buf, type, memaddr, myaddr, len) | |
3013 | char *buf; | |
3014 | int type; | |
3015 | CORE_ADDR memaddr; | |
3016 | unsigned char *myaddr; | |
3017 | int len; | |
3018 | { | |
3019 | unsigned char checksum; | |
3020 | int i; | |
3021 | ||
3022 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
3023 | and 1 is the number of bytes in the count. */ | |
3024 | ||
3025 | /* FIXME!! bigger buf required for 64-bit! */ | |
3026 | buf[0] = 'S'; | |
3027 | buf[1] = type; | |
3028 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
3029 | /* This assumes S3 style downloads (4byte addresses). There should | |
3030 | probably be a check, or the code changed to make it more | |
3031 | explicit. */ | |
3032 | buf[3] = memaddr >> 24; | |
3033 | buf[4] = memaddr >> 16; | |
3034 | buf[5] = memaddr >> 8; | |
3035 | buf[6] = memaddr; | |
3036 | memcpy (&buf[7], myaddr, len); | |
3037 | ||
3038 | /* Note that the checksum is calculated on the raw data, not the | |
3039 | hexified data. It includes the length, address and the data | |
3040 | portions of the packet. */ | |
3041 | checksum = 0; | |
3042 | buf += 2; /* Point at length byte */ | |
3043 | for (i = 0; i < len + 4 + 1; i++) | |
3044 | checksum += *buf++; | |
3045 | ||
3046 | *buf = ~checksum; | |
3047 | ||
3048 | return len + 8; | |
3049 | } | |
3050 | ||
3051 | /* The following manifest controls whether we enable the simple flow | |
3052 | control support provided by the monitor. If enabled the code will | |
3053 | wait for an affirmative ACK between transmitting packets. */ | |
3054 | #define DOETXACK (1) | |
3055 | ||
3056 | /* The PMON fast-download uses an encoded packet format constructed of | |
3057 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
3058 | escape sequences (preceded by a '/'): | |
3059 | ||
c5aa993b JM |
3060 | 'K' clear checksum |
3061 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
3062 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
3063 | 'Z' zero fill multiple of 3bytes | |
3064 | 'B' byte (12bit encoded value, of 8bit data) | |
3065 | 'A' address (36bit encoded value) | |
3066 | 'E' define entry as original address, and exit load | |
c906108c SS |
3067 | |
3068 | The packets are processed in 4 character chunks, so the escape | |
3069 | sequences that do not have any data (or variable length data) | |
3070 | should be padded to a 4 character boundary. The decoder will give | |
3071 | an error if the complete message block size is not a multiple of | |
3072 | 4bytes (size of record). | |
3073 | ||
3074 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
3075 | used to index into this string to get the specific character | |
3076 | encoding for the value: */ | |
3077 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
3078 | ||
3079 | /* Convert the number of bits required into an encoded number, 6bits | |
3080 | at a time (range 0..63). Keep a checksum if required (passed | |
3081 | pointer non-NULL). The function returns the number of encoded | |
3082 | characters written into the buffer. */ | |
3083 | static int | |
3084 | pmon_makeb64 (v, p, n, chksum) | |
3085 | unsigned long v; | |
3086 | char *p; | |
3087 | int n; | |
3088 | int *chksum; | |
3089 | { | |
3090 | int count = (n / 6); | |
3091 | ||
c5aa993b JM |
3092 | if ((n % 12) != 0) |
3093 | { | |
3094 | fprintf_unfiltered (gdb_stderr, | |
3095 | "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s"); | |
3096 | return (0); | |
3097 | } | |
3098 | if (n > 36) | |
3099 | { | |
3100 | fprintf_unfiltered (gdb_stderr, | |
3101 | "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n); | |
3102 | return (0); | |
3103 | } | |
c906108c SS |
3104 | |
3105 | /* Deal with the checksum: */ | |
c5aa993b JM |
3106 | if (chksum != NULL) |
3107 | { | |
3108 | switch (n) | |
3109 | { | |
3110 | case 36: | |
3111 | *chksum += ((v >> 24) & 0xFFF); | |
3112 | case 24: | |
3113 | *chksum += ((v >> 12) & 0xFFF); | |
3114 | case 12: | |
3115 | *chksum += ((v >> 0) & 0xFFF); | |
3116 | } | |
c906108c | 3117 | } |
c906108c | 3118 | |
c5aa993b JM |
3119 | do |
3120 | { | |
3121 | n -= 6; | |
3122 | *p++ = encoding[(v >> n) & 0x3F]; | |
3123 | } | |
3124 | while (n > 0); | |
c906108c | 3125 | |
c5aa993b | 3126 | return (count); |
c906108c SS |
3127 | } |
3128 | ||
3129 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
3130 | escape sequence into the data stream. */ | |
3131 | static int | |
3132 | pmon_zeroset (recsize, buff, amount, chksum) | |
3133 | int recsize; | |
3134 | char **buff; | |
3135 | int *amount; | |
3136 | unsigned int *chksum; | |
3137 | { | |
3138 | int count; | |
3139 | ||
c5aa993b | 3140 | sprintf (*buff, "/Z"); |
c906108c SS |
3141 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
3142 | *buff += (count + 2); | |
3143 | *amount = 0; | |
c5aa993b | 3144 | return (recsize + count + 2); |
c906108c SS |
3145 | } |
3146 | ||
3147 | static int | |
3148 | pmon_checkset (recsize, buff, value) | |
3149 | int recsize; | |
3150 | char **buff; | |
3151 | int *value; | |
3152 | { | |
3153 | int count; | |
3154 | ||
3155 | /* Add the checksum (without updating the value): */ | |
3156 | sprintf (*buff, "/C"); | |
3157 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
3158 | *buff += (count + 2); | |
3159 | sprintf (*buff, "\n"); | |
c5aa993b | 3160 | *buff += 2; /* include zero terminator */ |
c906108c SS |
3161 | /* Forcing a checksum validation clears the sum: */ |
3162 | *value = 0; | |
c5aa993b | 3163 | return (recsize + count + 3); |
c906108c SS |
3164 | } |
3165 | ||
3166 | /* Amount of padding we leave after at the end of the output buffer, | |
3167 | for the checksum and line termination characters: */ | |
3168 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
3169 | /* zero-fill, checksum, transfer end and line termination space. */ | |
3170 | ||
3171 | /* The amount of binary data loaded from the object file in a single | |
3172 | operation: */ | |
3173 | #define BINCHUNK (1024) | |
3174 | ||
3175 | /* Maximum line of data accepted by the monitor: */ | |
3176 | #define MAXRECSIZE (550) | |
3177 | /* NOTE: This constant depends on the monitor being used. This value | |
3178 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
3179 | ||
3180 | static void | |
3181 | pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill) | |
3182 | char **outbuf; | |
3183 | unsigned char *inbuf; | |
3184 | int *inptr; | |
3185 | int inamount; | |
3186 | int *recsize; | |
3187 | unsigned int *csum; | |
3188 | unsigned int *zerofill; | |
3189 | { | |
3190 | int count = 0; | |
3191 | char *p = *outbuf; | |
3192 | ||
3193 | /* This is a simple check to ensure that our data will fit within | |
3194 | the maximum allowable record size. Each record output is 4bytes | |
3195 | in length. We must allow space for a pending zero fill command, | |
3196 | the record, and a checksum record. */ | |
c5aa993b JM |
3197 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
3198 | { | |
3199 | /* Process the binary data: */ | |
3200 | if ((inamount - *inptr) < 3) | |
3201 | { | |
3202 | if (*zerofill != 0) | |
3203 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3204 | sprintf (p, "/B"); | |
3205 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
3206 | p += (2 + count); | |
3207 | *recsize += (2 + count); | |
3208 | (*inptr)++; | |
3209 | } | |
3210 | else | |
3211 | { | |
3212 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
3213 | /* Simple check for zero data. TODO: A better check would be | |
3214 | to check the last, and then the middle byte for being zero | |
3215 | (if the first byte is not). We could then check for | |
3216 | following runs of zeros, and if above a certain size it is | |
3217 | worth the 4 or 8 character hit of the byte insertions used | |
3218 | to pad to the start of the zeroes. NOTE: This also depends | |
3219 | on the alignment at the end of the zero run. */ | |
3220 | if (value == 0x00000000) | |
3221 | { | |
3222 | (*zerofill)++; | |
3223 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
3224 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3225 | } | |
3226 | else | |
3227 | { | |
3228 | if (*zerofill != 0) | |
3229 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3230 | count = pmon_makeb64 (value, p, 24, csum); | |
3231 | p += count; | |
3232 | *recsize += count; | |
3233 | } | |
3234 | *inptr += 3; | |
3235 | } | |
c906108c | 3236 | } |
c906108c SS |
3237 | |
3238 | *outbuf = p; | |
3239 | return; | |
3240 | } | |
3241 | ||
3242 | static int | |
c5aa993b | 3243 | pmon_check_ack (mesg) |
c906108c SS |
3244 | char *mesg; |
3245 | { | |
3246 | #if defined(DOETXACK) | |
3247 | int c; | |
3248 | ||
3249 | if (!tftp_in_use) | |
3250 | { | |
3251 | c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc, 2); | |
3252 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) | |
3253 | { | |
3254 | fprintf_unfiltered (gdb_stderr, | |
3255 | "Failed to receive valid ACK for %s\n", mesg); | |
c5aa993b | 3256 | return (-1); /* terminate the download */ |
c906108c SS |
3257 | } |
3258 | } | |
3259 | #endif /* DOETXACK */ | |
c5aa993b | 3260 | return (0); |
c906108c SS |
3261 | } |
3262 | ||
3263 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
3264 | which is either a serial port or a UDP socket. */ | |
3265 | ||
3266 | static void | |
3267 | pmon_start_download () | |
3268 | { | |
3269 | if (tftp_in_use) | |
3270 | { | |
3271 | /* Create the temporary download file. */ | |
3272 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
3273 | perror_with_name (tftp_localname); | |
3274 | } | |
3275 | else | |
3276 | { | |
3277 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3278 | mips_expect ("Downloading from "); | |
3279 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3280 | mips_expect (", ^C to abort\r\n"); | |
3281 | } | |
3282 | } | |
3283 | ||
3284 | static int | |
3285 | mips_expect_download (char *string) | |
3286 | { | |
3287 | if (!mips_expect (string)) | |
3288 | { | |
3289 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3290 | if (tftp_in_use) | |
3291 | remove (tftp_localname); /* Remove temporary file */ | |
3292 | return 0; | |
3293 | } | |
3294 | else | |
3295 | return 1; | |
3296 | } | |
3297 | ||
3298 | static void | |
3299 | pmon_end_download (final, bintotal) | |
3300 | int final; | |
3301 | int bintotal; | |
3302 | { | |
c5aa993b | 3303 | char hexnumber[9]; /* includes '\0' space */ |
c906108c SS |
3304 | |
3305 | if (tftp_in_use) | |
3306 | { | |
3307 | static char *load_cmd_prefix = "load -b -s "; | |
3308 | char *cmd; | |
3309 | struct stat stbuf; | |
3310 | ||
3311 | /* Close off the temporary file containing the load data. */ | |
3312 | fclose (tftp_file); | |
3313 | tftp_file = NULL; | |
3314 | ||
3315 | /* Make the temporary file readable by the world. */ | |
3316 | if (stat (tftp_localname, &stbuf) == 0) | |
3317 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3318 | ||
3319 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
3320 | mips_send_command ("initEther\r", -1); | |
3321 | ||
3322 | /* Send the load command. */ | |
3323 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3324 | strcpy (cmd, load_cmd_prefix); | |
3325 | strcat (cmd, tftp_name); | |
3326 | strcat (cmd, "\r"); | |
3327 | mips_send_command (cmd, 0); | |
3328 | free (cmd); | |
3329 | if (!mips_expect_download ("Downloading from ")) | |
3330 | return; | |
3331 | if (!mips_expect_download (tftp_name)) | |
3332 | return; | |
3333 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3334 | return; | |
3335 | } | |
3336 | ||
3337 | /* Wait for the stuff that PMON prints after the load has completed. | |
3338 | The timeout value for use in the tftp case (15 seconds) was picked | |
3339 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
3340 | if (mips_monitor == MON_LSI) | |
3341 | { | |
3342 | pmon_check_ack ("termination"); | |
3343 | mips_expect_timeout ("Entry address is ", tftp_in_use ? 15 : 2); | |
3344 | } | |
3345 | else | |
3346 | mips_expect_timeout ("Entry Address = ", tftp_in_use ? 15 : 2); | |
3347 | ||
c5aa993b | 3348 | sprintf (hexnumber, "%x", final); |
c906108c SS |
3349 | mips_expect (hexnumber); |
3350 | mips_expect ("\r\n"); | |
3351 | if (mips_monitor != MON_LSI) | |
3352 | pmon_check_ack ("termination"); | |
3353 | mips_expect ("\r\ntotal = 0x"); | |
c5aa993b | 3354 | sprintf (hexnumber, "%x", bintotal); |
c906108c SS |
3355 | mips_expect (hexnumber); |
3356 | if (!mips_expect_download (" bytes\r\n")) | |
3357 | return; | |
3358 | ||
3359 | if (tftp_in_use) | |
3360 | remove (tftp_localname); /* Remove temporary file */ | |
3361 | } | |
3362 | ||
3363 | static void | |
3364 | pmon_download (buffer, length) | |
3365 | char *buffer; | |
3366 | int length; | |
3367 | { | |
3368 | if (tftp_in_use) | |
3369 | fwrite (buffer, 1, length, tftp_file); | |
3370 | else | |
3371 | SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length); | |
3372 | } | |
3373 | ||
3374 | static void | |
3375 | pmon_load_fast (file) | |
3376 | char *file; | |
3377 | { | |
3378 | bfd *abfd; | |
3379 | asection *s; | |
3380 | unsigned char *binbuf; | |
3381 | char *buffer; | |
3382 | int reclen; | |
3383 | unsigned int csum = 0; | |
3384 | int hashmark = !tftp_in_use; | |
3385 | int bintotal = 0; | |
3386 | int final = 0; | |
3387 | int finished = 0; | |
3388 | ||
c5aa993b JM |
3389 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3390 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3391 | |
c5aa993b | 3392 | abfd = bfd_openr (file, 0); |
c906108c | 3393 | if (!abfd) |
c5aa993b JM |
3394 | { |
3395 | printf_filtered ("Unable to open file %s\n", file); | |
3396 | return; | |
3397 | } | |
c906108c | 3398 | |
c5aa993b JM |
3399 | if (bfd_check_format (abfd, bfd_object) == 0) |
3400 | { | |
3401 | printf_filtered ("File is not an object file\n"); | |
3402 | return; | |
3403 | } | |
c906108c SS |
3404 | |
3405 | /* Setup the required download state: */ | |
3406 | mips_send_command ("set dlproto etxack\r", -1); | |
3407 | mips_send_command ("set dlecho off\r", -1); | |
3408 | /* NOTE: We get a "cannot set variable" message if the variable is | |
3409 | already defined to have the argument we give. The code doesn't | |
3410 | care, since it just scans to the next prompt anyway. */ | |
3411 | /* Start the download: */ | |
c5aa993b JM |
3412 | pmon_start_download (); |
3413 | ||
c906108c | 3414 | /* Zero the checksum */ |
c5aa993b JM |
3415 | sprintf (buffer, "/Kxx\n"); |
3416 | reclen = strlen (buffer); | |
c906108c | 3417 | pmon_download (buffer, reclen); |
c5aa993b | 3418 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3419 | |
3420 | for (s = abfd->sections; s && !finished; s = s->next) | |
c5aa993b JM |
3421 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ |
3422 | { | |
3423 | bintotal += s->_raw_size; | |
3424 | final = (s->vma + s->_raw_size); | |
3425 | ||
3426 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma, | |
3427 | (unsigned int) (s->vma + s->_raw_size)); | |
3428 | gdb_flush (gdb_stdout); | |
3429 | ||
3430 | /* Output the starting address */ | |
3431 | sprintf (buffer, "/A"); | |
3432 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3433 | buffer[2 + reclen] = '\n'; | |
3434 | buffer[3 + reclen] = '\0'; | |
3435 | reclen += 3; /* for the initial escape code and carriage return */ | |
3436 | pmon_download (buffer, reclen); | |
3437 | finished = pmon_check_ack ("/A"); | |
3438 | ||
3439 | if (!finished) | |
3440 | { | |
3441 | unsigned int binamount; | |
3442 | unsigned int zerofill = 0; | |
3443 | char *bp = buffer; | |
3444 | unsigned int i; | |
3445 | ||
3446 | reclen = 0; | |
3447 | ||
3448 | for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) | |
3449 | { | |
3450 | int binptr = 0; | |
3451 | ||
3452 | binamount = min (BINCHUNK, s->_raw_size - i); | |
3453 | ||
3454 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3455 | ||
3456 | /* This keeps a rolling checksum, until we decide to output | |
3457 | the line: */ | |
3458 | for (; ((binamount - binptr) > 0);) | |
3459 | { | |
3460 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill); | |
3461 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) | |
3462 | { | |
3463 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3464 | pmon_download (buffer, reclen); | |
3465 | finished = pmon_check_ack ("data record"); | |
3466 | if (finished) | |
3467 | { | |
3468 | zerofill = 0; /* do not transmit pending zerofills */ | |
3469 | break; | |
3470 | } | |
3471 | ||
3472 | if (hashmark) | |
3473 | { | |
3474 | putchar_unfiltered ('#'); | |
3475 | gdb_flush (gdb_stdout); | |
3476 | } | |
3477 | ||
3478 | bp = buffer; | |
3479 | reclen = 0; /* buffer processed */ | |
3480 | } | |
3481 | } | |
3482 | } | |
3483 | ||
3484 | /* Ensure no out-standing zerofill requests: */ | |
3485 | if (zerofill != 0) | |
3486 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3487 | ||
3488 | /* and then flush the line: */ | |
3489 | if (reclen > 0) | |
3490 | { | |
3491 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3492 | /* Currently pmon_checkset outputs the line terminator by | |
3493 | default, so we write out the buffer so far: */ | |
3494 | pmon_download (buffer, reclen); | |
3495 | finished = pmon_check_ack ("record remnant"); | |
3496 | } | |
3497 | } | |
3498 | ||
3499 | putchar_unfiltered ('\n'); | |
3500 | } | |
c906108c SS |
3501 | |
3502 | /* Terminate the transfer. We know that we have an empty output | |
3503 | buffer at this point. */ | |
c5aa993b | 3504 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
c906108c SS |
3505 | reclen = strlen (buffer); |
3506 | pmon_download (buffer, reclen); | |
3507 | ||
c5aa993b JM |
3508 | if (finished) |
3509 | { /* Ignore the termination message: */ | |
3510 | SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc); | |
3511 | } | |
3512 | else | |
3513 | { /* Deal with termination message: */ | |
3514 | pmon_end_download (final, bintotal); | |
3515 | } | |
c906108c SS |
3516 | |
3517 | return; | |
3518 | } | |
3519 | ||
3520 | /* mips_load -- download a file. */ | |
3521 | ||
3522 | static void | |
3523 | mips_load (file, from_tty) | |
c5aa993b JM |
3524 | char *file; |
3525 | int from_tty; | |
c906108c SS |
3526 | { |
3527 | /* Get the board out of remote debugging mode. */ | |
3528 | if (mips_exit_debug ()) | |
3529 | error ("mips_load: Couldn't get into monitor mode."); | |
3530 | ||
3531 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3532 | pmon_load_fast (file); |
c906108c | 3533 | else |
c5aa993b | 3534 | mips_load_srec (file); |
c906108c SS |
3535 | |
3536 | mips_initialize (); | |
3537 | ||
3538 | /* Finally, make the PC point at the start address */ | |
3539 | if (mips_monitor != MON_IDT) | |
3540 | { | |
3541 | /* Work around problem where PMON monitor updates the PC after a load | |
c5aa993b JM |
3542 | to a different value than GDB thinks it has. The following ensures |
3543 | that the write_pc() WILL update the PC value: */ | |
c906108c SS |
3544 | register_valid[PC_REGNUM] = 0; |
3545 | } | |
3546 | if (exec_bfd) | |
3547 | write_pc (bfd_get_start_address (exec_bfd)); | |
3548 | ||
3549 | inferior_pid = 0; /* No process now */ | |
3550 | ||
3551 | /* This is necessary because many things were based on the PC at the time that | |
3552 | we attached to the monitor, which is no longer valid now that we have loaded | |
3553 | new code (and just changed the PC). Another way to do this might be to call | |
3554 | normal_stop, except that the stack may not be valid, and things would get | |
3555 | horribly confused... */ | |
3556 | ||
3557 | clear_symtab_users (); | |
3558 | } | |
3559 | ||
3560 | ||
3561 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3562 | ||
3563 | static void | |
3564 | pmon_command (args, from_tty) | |
3565 | char *args; | |
3566 | int from_tty; | |
3567 | { | |
3568 | char buf[DATA_MAXLEN + 1]; | |
3569 | int rlen; | |
3570 | ||
3571 | sprintf (buf, "0x0 %s", args); | |
3572 | mips_send_packet (buf, 1); | |
3573 | printf_filtered ("Send packet: %s\n", buf); | |
3574 | ||
3575 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3576 | buf[rlen] = '\0'; | |
3577 | printf_filtered ("Received packet: %s\n", buf); | |
3578 | } | |
3579 | \f | |
3580 | void | |
3581 | _initialize_remote_mips () | |
3582 | { | |
3583 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3584 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3585 | mips_ops.to_close = mips_close; | |
3586 | mips_ops.to_detach = mips_detach; | |
3587 | mips_ops.to_resume = mips_resume; | |
3588 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3589 | mips_ops.to_store_registers = mips_store_registers; | |
3590 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
3591 | mips_ops.to_xfer_memory = mips_xfer_memory; | |
3592 | mips_ops.to_files_info = mips_files_info; | |
3593 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3594 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
3595 | mips_ops.to_kill = mips_kill; | |
3596 | mips_ops.to_load = mips_load; | |
3597 | mips_ops.to_create_inferior = mips_create_inferior; | |
3598 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
3599 | mips_ops.to_stratum = process_stratum; | |
3600 | mips_ops.to_has_all_memory = 1; | |
3601 | mips_ops.to_has_memory = 1; | |
3602 | mips_ops.to_has_stack = 1; | |
3603 | mips_ops.to_has_registers = 1; | |
3604 | mips_ops.to_has_execution = 1; | |
3605 | mips_ops.to_magic = OPS_MAGIC; | |
3606 | ||
3607 | /* Copy the common fields to all four target vectors. */ | |
3608 | pmon_ops = ddb_ops = lsi_ops = mips_ops; | |
3609 | ||
3610 | /* Initialize target-specific fields in the target vectors. */ | |
3611 | mips_ops.to_shortname = "mips"; | |
3612 | mips_ops.to_doc = "\ | |
3613 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3614 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3615 | HOST:PORT to access a board over a network"; | |
3616 | mips_ops.to_open = mips_open; | |
3617 | mips_ops.to_wait = mips_wait; | |
3618 | ||
3619 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3620 | pmon_ops.to_doc = "\ |
c906108c SS |
3621 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3622 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3623 | colon, HOST:PORT to access a board over a network"; | |
3624 | pmon_ops.to_open = pmon_open; | |
3625 | pmon_ops.to_wait = mips_wait; | |
3626 | ||
3627 | ddb_ops.to_shortname = "ddb"; | |
3628 | ddb_ops.to_doc = "\ | |
3629 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3630 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3631 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3632 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3633 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3634 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3635 | ddb_ops.to_open = ddb_open; | |
3636 | ddb_ops.to_wait = mips_wait; | |
3637 | ||
3638 | lsi_ops.to_shortname = "lsi"; | |
3639 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3640 | lsi_ops.to_open = lsi_open; | |
3641 | lsi_ops.to_wait = mips_wait; | |
3642 | ||
3643 | /* Add the targets. */ | |
3644 | add_target (&mips_ops); | |
3645 | add_target (&pmon_ops); | |
3646 | add_target (&ddb_ops); | |
3647 | add_target (&lsi_ops); | |
3648 | ||
3649 | add_show_from_set ( | |
c5aa993b JM |
3650 | add_set_cmd ("timeout", no_class, var_zinteger, |
3651 | (char *) &mips_receive_wait, | |
3652 | "Set timeout in seconds for remote MIPS serial I/O.", | |
3653 | &setlist), | |
3654 | &showlist); | |
c906108c SS |
3655 | |
3656 | add_show_from_set ( | |
c5aa993b JM |
3657 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, |
3658 | (char *) &mips_retransmit_wait, | |
3659 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
c906108c SS |
3660 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
3661 | before resending the packet.", &setlist), | |
c5aa993b | 3662 | &showlist); |
c906108c SS |
3663 | |
3664 | add_show_from_set ( | |
c5aa993b JM |
3665 | add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, |
3666 | (char *) &mips_syn_garbage, | |
3667 | "Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
c906108c SS |
3668 | This is the maximum number of characters GDB will ignore when trying to\n\ |
3669 | synchronize with the remote system. A value of -1 means that there is no limit\n\ | |
3670 | (Note that these characters are printed out even though they are ignored.)", | |
c5aa993b JM |
3671 | &setlist), |
3672 | &showlist); | |
c906108c SS |
3673 | |
3674 | add_show_from_set | |
3675 | (add_set_cmd ("monitor-prompt", class_obscure, var_string, | |
3676 | (char *) &mips_monitor_prompt, | |
3677 | "Set the prompt that GDB expects from the monitor.", | |
3678 | &setlist), | |
3679 | &showlist); | |
3680 | ||
3681 | add_show_from_set ( | |
c5aa993b JM |
3682 | add_set_cmd ("monitor-warnings", class_obscure, var_zinteger, |
3683 | (char *) &monitor_warnings, | |
3684 | "Set printing of monitor warnings.\n" | |
3685 | "When enabled, monitor warnings about hardware breakpoints " | |
3686 | "will be displayed.", | |
3687 | &setlist), | |
3688 | &showlist); | |
c906108c SS |
3689 | |
3690 | add_com ("pmon <command>", class_obscure, pmon_command, | |
c5aa993b | 3691 | "Send a packet to PMON (must be in debug mode)."); |
c906108c | 3692 | } |