Commit | Line | Data |
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33742334 | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
4887063b | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
33742334 ILT |
3 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
4 | <ian@cygnus.com>. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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 | |
6c9638b4 | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
33742334 ILT |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "bfd.h" | |
77641260 | 25 | #include "symfile.h" |
33742334 ILT |
26 | #include "wait.h" |
27 | #include "gdbcmd.h" | |
28 | #include "gdbcore.h" | |
29 | #include "serial.h" | |
30 | #include "target.h" | |
66a48870 | 31 | #include "remote-utils.h" |
ee455463 | 32 | #include "gdb_string.h" |
33742334 ILT |
33 | |
34 | #include <signal.h> | |
ee455463 MA |
35 | #include <sys/types.h> |
36 | #include <sys/stat.h> | |
73d3dbd4 | 37 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
38 | #include <stdarg.h> |
39 | #else | |
96e5f161 | 40 | #include <varargs.h> |
85c613aa | 41 | #endif |
ae55bdbc | 42 | |
214e9692 MA |
43 | /* Microsoft C's stat.h doesn't define all the POSIX file modes. */ |
44 | #ifndef S_IROTH | |
45 | #define S_IROTH S_IREAD | |
46 | #endif | |
47 | ||
ae55bdbc SS |
48 | extern void mips_set_processor_type_command PARAMS ((char *, int)); |
49 | ||
d6ca85a8 | 50 | \f |
33742334 ILT |
51 | /* Prototypes for local functions. */ |
52 | ||
ae55bdbc | 53 | static int mips_readchar PARAMS ((int timeout)); |
33742334 | 54 | |
ae55bdbc SS |
55 | static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, |
56 | int ch, int timeout)); | |
33742334 | 57 | |
ae55bdbc SS |
58 | static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, |
59 | int *pch, int timeout)); | |
33742334 ILT |
60 | |
61 | static int mips_cksum PARAMS ((const unsigned char *hdr, | |
62 | const unsigned char *data, | |
63 | int len)); | |
64 | ||
ae55bdbc | 65 | static void mips_send_packet PARAMS ((const char *s, int get_ack)); |
33742334 | 66 | |
090d784a JSC |
67 | static void mips_send_command PARAMS ((const char *cmd, int prompt)); |
68 | ||
4c6071f7 JK |
69 | static int mips_receive_packet PARAMS ((char *buff, int throw_error, |
70 | int timeout)); | |
33742334 | 71 | |
28444bf3 DP |
72 | static CORE_ADDR mips_request PARAMS ((int cmd, CORE_ADDR addr, |
73 | CORE_ADDR data, int *perr, int timeout, | |
cd10c7e3 | 74 | char *buff)); |
33742334 | 75 | |
ae55bdbc | 76 | static void mips_initialize PARAMS ((void)); |
c2a0f1cb | 77 | |
ae55bdbc | 78 | static void mips_open PARAMS ((char *name, int from_tty)); |
33742334 | 79 | |
090d784a JSC |
80 | static void pmon_open PARAMS ((char *name, int from_tty)); |
81 | ||
5dad8312 | 82 | static void ddb_open PARAMS ((char *name, int from_tty)); |
51328506 | 83 | |
7061bb0e MA |
84 | static void lsi_open PARAMS ((char *name, int from_tty)); |
85 | ||
ae55bdbc | 86 | static void mips_close PARAMS ((int quitting)); |
33742334 | 87 | |
ae55bdbc | 88 | static void mips_detach PARAMS ((char *args, int from_tty)); |
33742334 | 89 | |
67ac9759 JK |
90 | static void mips_resume PARAMS ((int pid, int step, |
91 | enum target_signal siggnal)); | |
33742334 | 92 | |
ae55bdbc | 93 | static int mips_wait PARAMS ((int pid, struct target_waitstatus *status)); |
33742334 | 94 | |
090d784a JSC |
95 | static int pmon_wait PARAMS ((int pid, struct target_waitstatus *status)); |
96 | ||
ae55bdbc | 97 | static int mips_map_regno PARAMS ((int regno)); |
33742334 | 98 | |
ae55bdbc | 99 | static void mips_fetch_registers PARAMS ((int regno)); |
33742334 | 100 | |
ae55bdbc | 101 | static void mips_prepare_to_store PARAMS ((void)); |
33742334 | 102 | |
ae55bdbc | 103 | static void mips_store_registers PARAMS ((int regno)); |
33742334 | 104 | |
28444bf3 | 105 | static unsigned int mips_fetch_word PARAMS ((CORE_ADDR addr)); |
33742334 | 106 | |
28444bf3 | 107 | static int mips_store_word PARAMS ((CORE_ADDR addr, unsigned int value, |
ae55bdbc | 108 | char *old_contents)); |
33742334 | 109 | |
ae55bdbc SS |
110 | static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
111 | int write, struct target_ops *ignore)); | |
33742334 | 112 | |
ae55bdbc | 113 | static void mips_files_info PARAMS ((struct target_ops *ignore)); |
33742334 | 114 | |
ae55bdbc SS |
115 | static void mips_create_inferior PARAMS ((char *execfile, char *args, |
116 | char **env)); | |
33742334 | 117 | |
ae55bdbc | 118 | static void mips_mourn_inferior PARAMS ((void)); |
33742334 | 119 | |
090d784a JSC |
120 | static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum)); |
121 | ||
122 | static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount, | |
123 | unsigned int *chksum)); | |
124 | ||
125 | static int pmon_checkset PARAMS ((int recsize, char **buff, int *value)); | |
126 | ||
127 | static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf, | |
128 | int *inptr, int inamount, int *recsize, | |
129 | unsigned int *csum, unsigned int *zerofill)); | |
130 | ||
ee455463 MA |
131 | static int pmon_check_ack PARAMS ((char *mesg)); |
132 | ||
133 | static void pmon_start_download PARAMS ((void)); | |
134 | ||
135 | static void pmon_end_download PARAMS ((int final, int bintotal)); | |
136 | ||
137 | static void pmon_download PARAMS ((char *buffer, int length)); | |
090d784a JSC |
138 | |
139 | static void pmon_load_fast PARAMS ((char *file)); | |
140 | ||
4704fd9c SG |
141 | static void mips_load PARAMS ((char *file, int from_tty)); |
142 | ||
cd10c7e3 | 143 | static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr, |
4704fd9c SG |
144 | unsigned char *myaddr, int len)); |
145 | ||
cd10c7e3 SG |
146 | static int common_breakpoint PARAMS ((int cmd, CORE_ADDR addr, CORE_ADDR mask, |
147 | char *flags)); | |
090d784a | 148 | |
090d784a | 149 | /* Forward declarations. */ |
33742334 | 150 | extern struct target_ops mips_ops; |
090d784a | 151 | extern struct target_ops pmon_ops; |
5dad8312 | 152 | extern struct target_ops ddb_ops; |
d6ca85a8 | 153 | \f |
33742334 ILT |
154 | /* The MIPS remote debugging interface is built on top of a simple |
155 | packet protocol. Each packet is organized as follows: | |
156 | ||
157 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN | |
158 | may not appear anywhere else in the packet. Any time a SYN is | |
159 | seen, a new packet should be assumed to have begun. | |
160 | ||
161 | TYPE_LEN | |
162 | This byte contains the upper five bits of the logical length | |
163 | of the data section, plus a single bit indicating whether this | |
164 | is a data packet or an acknowledgement. The documentation | |
165 | indicates that this bit is 1 for a data packet, but the actual | |
166 | board uses 1 for an acknowledgement. The value of the byte is | |
167 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
168 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
169 | not carry data, and must have a data length of 0. | |
170 | ||
171 | LEN1 This byte contains the lower six bits of the logical length of | |
172 | the data section. The value is | |
173 | 0x40 + (len & 0x3f) | |
174 | ||
175 | SEQ This byte contains the six bit sequence number of the packet. | |
176 | The value is | |
177 | 0x40 + seq | |
178 | An acknowlegment packet contains the sequence number of the | |
4887063b | 179 | packet being acknowledged plus 1 modulo 64. Data packets are |
33742334 ILT |
180 | transmitted in sequence. There may only be one outstanding |
181 | unacknowledged data packet at a time. The sequence numbers | |
182 | are independent in each direction. If an acknowledgement for | |
183 | the previous packet is received (i.e., an acknowledgement with | |
184 | the sequence number of the packet just sent) the packet just | |
185 | sent should be retransmitted. If no acknowledgement is | |
186 | received within a timeout period, the packet should be | |
187 | retransmitted. This has an unfortunate failure condition on a | |
188 | high-latency line, as a delayed acknowledgement may lead to an | |
189 | endless series of duplicate packets. | |
190 | ||
191 | DATA The actual data bytes follow. The following characters are | |
192 | escaped inline with DLE (ASCII 020, or ^P): | |
193 | SYN (026) DLE S | |
194 | DLE (020) DLE D | |
195 | ^C (003) DLE C | |
196 | ^S (023) DLE s | |
197 | ^Q (021) DLE q | |
198 | The additional DLE characters are not counted in the logical | |
199 | length stored in the TYPE_LEN and LEN1 bytes. | |
200 | ||
201 | CSUM1 | |
202 | CSUM2 | |
203 | CSUM3 | |
204 | These bytes contain an 18 bit checksum of the complete | |
205 | contents of the packet excluding the SEQ byte and the | |
206 | CSUM[123] bytes. The checksum is simply the twos complement | |
207 | addition of all the bytes treated as unsigned characters. The | |
208 | values of the checksum bytes are: | |
209 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
210 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
211 | CSUM3: 0x40 + (cksum & 0x3f) | |
212 | ||
213 | It happens that the MIPS remote debugging protocol always | |
214 | communicates with ASCII strings. Because of this, this | |
215 | implementation doesn't bother to handle the DLE quoting mechanism, | |
216 | since it will never be required. */ | |
217 | ||
218 | /* The SYN character which starts each packet. */ | |
219 | #define SYN '\026' | |
220 | ||
221 | /* The 0x40 used to offset each packet (this value ensures that all of | |
222 | the header and trailer bytes, other than SYN, are printable ASCII | |
223 | characters). */ | |
224 | #define HDR_OFFSET 0x40 | |
225 | ||
226 | /* The indices of the bytes in the packet header. */ | |
227 | #define HDR_INDX_SYN 0 | |
228 | #define HDR_INDX_TYPE_LEN 1 | |
229 | #define HDR_INDX_LEN1 2 | |
230 | #define HDR_INDX_SEQ 3 | |
231 | #define HDR_LENGTH 4 | |
232 | ||
233 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
234 | #define TYPE_LEN_DA_BIT 0x20 | |
235 | #define TYPE_LEN_DATA 0 | |
236 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
237 | ||
238 | /* How to compute the header bytes. */ | |
239 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
240 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
241 | (HDR_OFFSET \ | |
242 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
243 | + (((len) >> 6) & 0x1f)) | |
244 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
245 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
246 | ||
247 | /* Check that a header byte is reasonable. */ | |
248 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
249 | ||
250 | /* Get data from the header. These macros evaluate their argument | |
251 | multiple times. */ | |
252 | #define HDR_IS_DATA(hdr) \ | |
253 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
254 | #define HDR_GET_LEN(hdr) \ | |
255 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
ee455463 | 256 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) |
33742334 ILT |
257 | |
258 | /* The maximum data length. */ | |
259 | #define DATA_MAXLEN 1023 | |
260 | ||
261 | /* The trailer offset. */ | |
262 | #define TRLR_OFFSET HDR_OFFSET | |
263 | ||
264 | /* The indices of the bytes in the packet trailer. */ | |
265 | #define TRLR_INDX_CSUM1 0 | |
266 | #define TRLR_INDX_CSUM2 1 | |
267 | #define TRLR_INDX_CSUM3 2 | |
268 | #define TRLR_LENGTH 3 | |
269 | ||
270 | /* How to compute the trailer bytes. */ | |
271 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
272 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
273 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
274 | ||
275 | /* Check that a trailer byte is reasonable. */ | |
276 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
277 | ||
278 | /* Get data from the trailer. This evaluates its argument multiple | |
279 | times. */ | |
280 | #define TRLR_GET_CKSUM(trlr) \ | |
281 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
282 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
283 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
284 | ||
285 | /* The sequence number modulos. */ | |
286 | #define SEQ_MODULOS (64) | |
287 | ||
ee455463 MA |
288 | /* PMON commands to load from the serial port or UDP socket. */ |
289 | #define LOAD_CMD "load -b -s tty0\r" | |
290 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
291 | ||
090d784a JSC |
292 | enum mips_monitor_type { |
293 | /* IDT/SIM monitor being used: */ | |
294 | MON_IDT, | |
295 | /* PMON monitor being used: */ | |
7061bb0e | 296 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ |
5dad8312 | 297 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ |
266454ca | 298 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ |
090d784a JSC |
299 | /* Last and unused value, for sizing vectors, etc. */ |
300 | MON_LAST | |
301 | }; | |
302 | static enum mips_monitor_type mips_monitor = MON_LAST; | |
303 | ||
b68b9783 MA |
304 | /* The monitor prompt text. If the user sets the PMON prompt |
305 | to some new value, the GDB `set monitor-prompt' command must also | |
306 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
307 | will not be able to connect to PMON in mips_initialize(). | |
308 | If the `set monitor-prompt' command is not used, the expected | |
309 | default prompt will be set according the target: | |
310 | target prompt | |
311 | ----- ----- | |
312 | pmon PMON> | |
313 | ddb NEC010> | |
314 | lsi PMON> | |
315 | */ | |
8e493b61 | 316 | static char *mips_monitor_prompt; |
090d784a | 317 | |
33742334 ILT |
318 | /* Set to 1 if the target is open. */ |
319 | static int mips_is_open; | |
320 | ||
090d784a JSC |
321 | /* Currently active target description (if mips_is_open == 1) */ |
322 | static struct target_ops *current_ops; | |
323 | ||
c2a0f1cb ILT |
324 | /* Set to 1 while the connection is being initialized. */ |
325 | static int mips_initializing; | |
326 | ||
7061bb0e MA |
327 | /* Set to 1 while the connection is being brought down. */ |
328 | static int mips_exiting; | |
329 | ||
33742334 | 330 | /* The next sequence number to send. */ |
090d784a | 331 | static unsigned int mips_send_seq; |
33742334 ILT |
332 | |
333 | /* The next sequence number we expect to receive. */ | |
090d784a | 334 | static unsigned int mips_receive_seq; |
33742334 ILT |
335 | |
336 | /* The time to wait before retransmitting a packet, in seconds. */ | |
337 | static int mips_retransmit_wait = 3; | |
338 | ||
339 | /* The number of times to try retransmitting a packet before giving up. */ | |
340 | static int mips_send_retries = 10; | |
341 | ||
342 | /* The number of garbage characters to accept when looking for an | |
343 | SYN for the next packet. */ | |
344 | static int mips_syn_garbage = 1050; | |
345 | ||
346 | /* The time to wait for a packet, in seconds. */ | |
c2a0f1cb | 347 | static int mips_receive_wait = 5; |
33742334 ILT |
348 | |
349 | /* Set if we have sent a packet to the board but have not yet received | |
350 | a reply. */ | |
351 | static int mips_need_reply = 0; | |
352 | ||
1724c671 SG |
353 | /* Handle used to access serial I/O stream. */ |
354 | static serial_t mips_desc; | |
355 | ||
ee455463 MA |
356 | /* UDP handle used to download files to target. */ |
357 | static serial_t udp_desc; | |
358 | static int udp_in_use; | |
359 | ||
360 | /* TFTP filename used to download files to DDB board, in the form | |
361 | host:filename. */ | |
362 | static char *tftp_name; /* host:filename */ | |
363 | static char *tftp_localname; /* filename portion of above */ | |
364 | static int tftp_in_use; | |
365 | static FILE *tftp_file; | |
366 | ||
cd10c7e3 SG |
367 | /* Counts the number of times the user tried to interrupt the target (usually |
368 | via ^C. */ | |
369 | static int interrupt_count; | |
370 | ||
371 | /* If non-zero, means that the target is running. */ | |
372 | static int mips_wait_flag = 0; | |
373 | ||
374 | /* If non-zero, monitor supports breakpoint commands. */ | |
375 | static monitor_supports_breakpoints = 0; | |
376 | ||
377 | /* Data cache header. */ | |
378 | ||
ee455463 | 379 | #if 0 /* not used (yet?) */ |
cd10c7e3 | 380 | static DCACHE *mips_dcache; |
ee455463 | 381 | #endif |
cd10c7e3 SG |
382 | |
383 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
384 | static int hit_watchpoint; | |
385 | ||
ee455463 MA |
386 | static void |
387 | close_ports() | |
388 | { | |
389 | mips_is_open = 0; | |
390 | SERIAL_CLOSE (mips_desc); | |
391 | ||
392 | if (udp_in_use) | |
393 | { | |
394 | SERIAL_CLOSE (udp_desc); | |
395 | udp_in_use = 0; | |
396 | } | |
397 | tftp_in_use = 0; | |
398 | } | |
399 | ||
4fb192be JK |
400 | /* Handle low-level error that we can't recover from. Note that just |
401 | error()ing out from target_wait or some such low-level place will cause | |
402 | all hell to break loose--the rest of GDB will tend to get left in an | |
403 | inconsistent state. */ | |
404 | ||
2b9fbee4 | 405 | static NORETURN void |
73d3dbd4 | 406 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
407 | mips_error (char *string, ...) |
408 | #else | |
4fb192be JK |
409 | mips_error (va_alist) |
410 | va_dcl | |
85c613aa | 411 | #endif |
4fb192be JK |
412 | { |
413 | va_list args; | |
4fb192be | 414 | |
73d3dbd4 | 415 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
416 | va_start (args, string); |
417 | #else | |
418 | char *string; | |
4fb192be | 419 | va_start (args); |
85c613aa C |
420 | string = va_arg (args, char *); |
421 | #endif | |
422 | ||
4fb192be JK |
423 | target_terminal_ours (); |
424 | wrap_here(""); /* Force out any buffered output */ | |
425 | gdb_flush (gdb_stdout); | |
426 | if (error_pre_print) | |
427 | fprintf_filtered (gdb_stderr, error_pre_print); | |
4fb192be JK |
428 | vfprintf_filtered (gdb_stderr, string, args); |
429 | fprintf_filtered (gdb_stderr, "\n"); | |
430 | va_end (args); | |
cd10c7e3 | 431 | gdb_flush (gdb_stderr); |
4fb192be | 432 | |
96e5f161 JK |
433 | /* Clean up in such a way that mips_close won't try to talk to the |
434 | board (it almost surely won't work since we weren't able to talk to | |
435 | it). */ | |
ee455463 | 436 | close_ports (); |
96e5f161 JK |
437 | |
438 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
4fb192be JK |
439 | target_mourn_inferior (); |
440 | ||
441 | return_to_top_level (RETURN_ERROR); | |
442 | } | |
443 | ||
ee455463 MA |
444 | /* putc_readable - print a character, displaying non-printable chars in |
445 | ^x notation or in hex. */ | |
446 | ||
447 | static void | |
448 | putc_readable (ch) | |
449 | int ch; | |
450 | { | |
451 | if (ch == '\n') | |
452 | putchar_unfiltered ('\n'); | |
453 | else if (ch == '\r') | |
454 | printf_unfiltered ("\\r"); | |
455 | else if (ch < 0x20) /* ASCII control character */ | |
456 | printf_unfiltered ("^%c", ch + '@'); | |
457 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ | |
458 | printf_unfiltered ("[%02x]", ch & 0xff); | |
459 | else | |
460 | putchar_unfiltered (ch); | |
461 | } | |
462 | ||
463 | ||
464 | /* puts_readable - print a string, displaying non-printable chars in | |
465 | ^x notation or in hex. */ | |
466 | ||
467 | static void | |
468 | puts_readable (string) | |
469 | char *string; | |
470 | { | |
471 | int c; | |
472 | ||
473 | while ((c = *string++) != '\0') | |
474 | putc_readable (c); | |
475 | } | |
476 | ||
477 | ||
cd10c7e3 | 478 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
ee455463 MA |
479 | timed out. TIMEOUT specifies timeout value in seconds. |
480 | */ | |
cd10c7e3 | 481 | |
4704fd9c | 482 | int |
ee455463 | 483 | mips_expect_timeout (string, timeout) |
4704fd9c | 484 | char *string; |
ee455463 | 485 | int timeout; |
4704fd9c SG |
486 | { |
487 | char *p = string; | |
4704fd9c | 488 | |
ee455463 MA |
489 | if (remote_debug) |
490 | { | |
491 | printf_unfiltered ("Expected \""); | |
492 | puts_readable (string); | |
493 | printf_unfiltered ("\", got \""); | |
494 | } | |
495 | ||
4704fd9c SG |
496 | immediate_quit = 1; |
497 | while (1) | |
498 | { | |
090d784a | 499 | int c; |
4704fd9c SG |
500 | |
501 | /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we | |
090d784a | 502 | were waiting for the mips_monitor_prompt... */ |
4704fd9c | 503 | |
ee455463 | 504 | c = SERIAL_READCHAR (mips_desc, timeout); |
4704fd9c SG |
505 | |
506 | if (c == SERIAL_TIMEOUT) | |
ee455463 MA |
507 | { |
508 | if (remote_debug) | |
509 | printf_unfiltered ("\": FAIL\n"); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | if (remote_debug) | |
514 | putc_readable (c); | |
4704fd9c SG |
515 | |
516 | if (c == *p++) | |
517 | { | |
518 | if (*p == '\0') | |
519 | { | |
520 | immediate_quit = 0; | |
ee455463 MA |
521 | if (remote_debug) |
522 | printf_unfiltered ("\": OK\n"); | |
4704fd9c SG |
523 | return 1; |
524 | } | |
525 | } | |
526 | else | |
527 | { | |
528 | p = string; | |
529 | if (c == *p) | |
530 | p++; | |
531 | } | |
532 | } | |
533 | } | |
534 | ||
ee455463 MA |
535 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
536 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
537 | mips_expect_timeout if a different timeout value is needed. | |
538 | */ | |
539 | ||
540 | int | |
541 | mips_expect (string) | |
542 | char *string; | |
543 | { | |
544 | return mips_expect_timeout (string, 2); | |
545 | } | |
546 | ||
090d784a JSC |
547 | /* Read the required number of characters into the given buffer (which |
548 | is assumed to be large enough). The only failure is a timeout. */ | |
549 | int | |
550 | mips_getstring (string, n) | |
551 | char *string; | |
552 | int n; | |
553 | { | |
554 | char *p = string; | |
555 | int c; | |
556 | ||
557 | immediate_quit = 1; | |
558 | while (n > 0) | |
559 | { | |
560 | c = SERIAL_READCHAR (mips_desc, 2); | |
561 | ||
562 | if (c == SERIAL_TIMEOUT) { | |
563 | fprintf_unfiltered (stderr, "Failed to read %d characters from target (TIMEOUT)\n", n); | |
564 | return 0; | |
565 | } | |
566 | ||
567 | *p++ = c; | |
568 | n--; | |
569 | } | |
570 | ||
571 | return 1; | |
572 | } | |
573 | ||
9a9a88c1 ILT |
574 | /* Read a character from the remote, aborting on error. Returns |
575 | SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR | |
090d784a | 576 | returns). FIXME: If we see the string mips_monitor_prompt from |
0e3a4b1e JSC |
577 | the board, then we are debugging on the main console port, and we |
578 | have somehow dropped out of remote debugging mode. In this case, | |
579 | we automatically go back in to remote debugging mode. This is a | |
580 | hack, put in because I can't find any way for a program running on | |
581 | the remote board to terminate without also ending remote debugging | |
9a9a88c1 ILT |
582 | mode. I assume users won't have any trouble with this; for one |
583 | thing, the IDT documentation generally assumes that the remote | |
584 | debugging port is not the console port. This is, however, very | |
585 | convenient for DejaGnu when you only have one connected serial | |
586 | port. */ | |
33742334 ILT |
587 | |
588 | static int | |
589 | mips_readchar (timeout) | |
590 | int timeout; | |
591 | { | |
592 | int ch; | |
c2a0f1cb | 593 | static int state = 0; |
8e493b61 | 594 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); |
090d784a | 595 | |
4887063b | 596 | #ifdef MAINTENANCE_CMDS |
090d784a JSC |
597 | { |
598 | int i; | |
4887063b | 599 | |
090d784a JSC |
600 | i = timeout; |
601 | if (i == -1 && watchdog > 0) | |
602 | i = watchdog; | |
603 | } | |
4887063b | 604 | #endif |
33742334 | 605 | |
090d784a | 606 | if (state == mips_monitor_prompt_len) |
b0a0ee52 | 607 | timeout = 1; |
1724c671 | 608 | ch = SERIAL_READCHAR (mips_desc, timeout); |
4887063b SG |
609 | #ifdef MAINTENANCE_CMDS |
610 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ | |
611 | { | |
612 | target_mourn_inferior (); | |
613 | error ("Watchdog has expired. Target detached.\n"); | |
614 | } | |
615 | #endif | |
1724c671 | 616 | if (ch == SERIAL_EOF) |
4fb192be | 617 | mips_error ("End of file from remote"); |
1724c671 | 618 | if (ch == SERIAL_ERROR) |
4fb192be | 619 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); |
cd10c7e3 | 620 | if (remote_debug > 1) |
33742334 | 621 | { |
47d52968 JK |
622 | /* Don't use _filtered; we can't deal with a QUIT out of |
623 | target_wait, and I think this might be called from there. */ | |
1724c671 | 624 | if (ch != SERIAL_TIMEOUT) |
47d52968 | 625 | printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch); |
33742334 | 626 | else |
47d52968 | 627 | printf_unfiltered ("Timed out in read\n"); |
33742334 | 628 | } |
c2a0f1cb | 629 | |
090d784a | 630 | /* If we have seen mips_monitor_prompt and we either time out, or |
0e3a4b1e JSC |
631 | we see a @ (which was echoed from a packet we sent), reset the |
632 | board as described above. The first character in a packet after | |
633 | the SYN (which is not echoed) is always an @ unless the packet is | |
634 | more than 64 characters long, which ours never are. */ | |
1724c671 | 635 | if ((ch == SERIAL_TIMEOUT || ch == '@') |
090d784a | 636 | && state == mips_monitor_prompt_len |
7061bb0e MA |
637 | && ! mips_initializing |
638 | && ! mips_exiting) | |
c2a0f1cb | 639 | { |
cd10c7e3 | 640 | if (remote_debug > 0) |
47d52968 JK |
641 | /* Don't use _filtered; we can't deal with a QUIT out of |
642 | target_wait, and I think this might be called from there. */ | |
643 | printf_unfiltered ("Reinitializing MIPS debugging mode\n"); | |
c2a0f1cb ILT |
644 | |
645 | mips_need_reply = 0; | |
646 | mips_initialize (); | |
647 | ||
648 | state = 0; | |
649 | ||
4887063b SG |
650 | /* At this point, about the only thing we can do is abort the command |
651 | in progress and get back to command level as quickly as possible. */ | |
652 | ||
653 | error ("Remote board reset, debug protocol re-initialized."); | |
c2a0f1cb ILT |
654 | } |
655 | ||
090d784a | 656 | if (ch == mips_monitor_prompt[state]) |
c2a0f1cb ILT |
657 | ++state; |
658 | else | |
659 | state = 0; | |
660 | ||
33742334 ILT |
661 | return ch; |
662 | } | |
663 | ||
664 | /* Get a packet header, putting the data in the supplied buffer. | |
665 | PGARBAGE is a pointer to the number of garbage characters received | |
666 | so far. CH is the last character received. Returns 0 for success, | |
667 | or -1 for timeout. */ | |
668 | ||
669 | static int | |
670 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
671 | unsigned char *hdr; | |
672 | int *pgarbage; | |
673 | int ch; | |
674 | int timeout; | |
675 | { | |
676 | int i; | |
677 | ||
678 | while (1) | |
679 | { | |
680 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
681 | sitting here indefinitely if the board sends us one garbage | |
682 | character per second. ch may already have a value from the | |
683 | last time through the loop. */ | |
684 | while (ch != SYN) | |
685 | { | |
686 | ch = mips_readchar (timeout); | |
9a9a88c1 | 687 | if (ch == SERIAL_TIMEOUT) |
090d784a | 688 | return -1; |
33742334 ILT |
689 | if (ch != SYN) |
690 | { | |
691 | /* Printing the character here lets the user of gdb see | |
692 | what the program is outputting, if the debugging is | |
47d52968 JK |
693 | being done on the console port. Don't use _filtered; |
694 | we can't deal with a QUIT out of target_wait. */ | |
cd10c7e3 | 695 | if (! mips_initializing || remote_debug > 0) |
c2a0f1cb | 696 | { |
ee455463 | 697 | putc_readable (ch); |
199b2450 | 698 | gdb_flush (gdb_stdout); |
c2a0f1cb | 699 | } |
33742334 ILT |
700 | |
701 | ++*pgarbage; | |
4c5bc9f4 SG |
702 | if (mips_syn_garbage > 0 |
703 | && *pgarbage > mips_syn_garbage) | |
cd10c7e3 SG |
704 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
705 | mips_syn_garbage); | |
33742334 ILT |
706 | } |
707 | } | |
708 | ||
709 | /* Get the packet header following the SYN. */ | |
710 | for (i = 1; i < HDR_LENGTH; i++) | |
711 | { | |
712 | ch = mips_readchar (timeout); | |
9a9a88c1 | 713 | if (ch == SERIAL_TIMEOUT) |
090d784a | 714 | return -1; |
33742334 ILT |
715 | /* Make sure this is a header byte. */ |
716 | if (ch == SYN || ! HDR_CHECK (ch)) | |
717 | break; | |
718 | ||
719 | hdr[i] = ch; | |
720 | } | |
721 | ||
722 | /* If we got the complete header, we can return. Otherwise we | |
723 | loop around and keep looking for SYN. */ | |
724 | if (i >= HDR_LENGTH) | |
090d784a | 725 | return 0; |
33742334 ILT |
726 | } |
727 | } | |
728 | ||
729 | /* Get a packet header, putting the data in the supplied buffer. | |
730 | PGARBAGE is a pointer to the number of garbage characters received | |
731 | so far. The last character read is returned in *PCH. Returns 0 | |
732 | for success, -1 for timeout, -2 for error. */ | |
733 | ||
734 | static int | |
735 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
736 | unsigned char *trlr; | |
737 | int *pgarbage; | |
738 | int *pch; | |
739 | int timeout; | |
740 | { | |
741 | int i; | |
742 | int ch; | |
743 | ||
744 | for (i = 0; i < TRLR_LENGTH; i++) | |
745 | { | |
746 | ch = mips_readchar (timeout); | |
747 | *pch = ch; | |
9a9a88c1 | 748 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
749 | return -1; |
750 | if (! TRLR_CHECK (ch)) | |
751 | return -2; | |
752 | trlr[i] = ch; | |
753 | } | |
754 | return 0; | |
755 | } | |
756 | ||
757 | /* Get the checksum of a packet. HDR points to the packet header. | |
758 | DATA points to the packet data. LEN is the length of DATA. */ | |
759 | ||
760 | static int | |
761 | mips_cksum (hdr, data, len) | |
762 | const unsigned char *hdr; | |
763 | const unsigned char *data; | |
764 | int len; | |
765 | { | |
766 | register const unsigned char *p; | |
767 | register int c; | |
768 | register int cksum; | |
769 | ||
770 | cksum = 0; | |
771 | ||
772 | /* The initial SYN is not included in the checksum. */ | |
773 | c = HDR_LENGTH - 1; | |
774 | p = hdr + 1; | |
775 | while (c-- != 0) | |
776 | cksum += *p++; | |
777 | ||
778 | c = len; | |
779 | p = data; | |
780 | while (c-- != 0) | |
781 | cksum += *p++; | |
782 | ||
783 | return cksum; | |
784 | } | |
785 | ||
786 | /* Send a packet containing the given ASCII string. */ | |
787 | ||
788 | static void | |
c2a0f1cb | 789 | mips_send_packet (s, get_ack) |
33742334 | 790 | const char *s; |
c2a0f1cb | 791 | int get_ack; |
33742334 | 792 | { |
ee455463 | 793 | /* unsigned */ int len; |
33742334 ILT |
794 | unsigned char *packet; |
795 | register int cksum; | |
796 | int try; | |
797 | ||
798 | len = strlen (s); | |
799 | if (len > DATA_MAXLEN) | |
4fb192be | 800 | mips_error ("MIPS protocol data packet too long: %s", s); |
33742334 ILT |
801 | |
802 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
803 | ||
804 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
805 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
806 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
807 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
808 | ||
809 | memcpy (packet + HDR_LENGTH, s, len); | |
810 | ||
811 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
812 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
813 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
814 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
815 | ||
816 | /* Increment the sequence number. This will set mips_send_seq to | |
817 | the sequence number we expect in the acknowledgement. */ | |
818 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
819 | ||
820 | /* We can only have one outstanding data packet, so we just wait for | |
821 | the acknowledgement here. Keep retransmitting the packet until | |
822 | we get one, or until we've tried too many times. */ | |
823 | for (try = 0; try < mips_send_retries; try++) | |
824 | { | |
825 | int garbage; | |
826 | int ch; | |
827 | ||
cd10c7e3 | 828 | if (remote_debug > 0) |
33742334 | 829 | { |
47d52968 JK |
830 | /* Don't use _filtered; we can't deal with a QUIT out of |
831 | target_wait, and I think this might be called from there. */ | |
33742334 | 832 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; |
47d52968 | 833 | printf_unfiltered ("Writing \"%s\"\n", packet + 1); |
33742334 ILT |
834 | } |
835 | ||
9a9a88c1 ILT |
836 | if (SERIAL_WRITE (mips_desc, packet, |
837 | HDR_LENGTH + len + TRLR_LENGTH) != 0) | |
4fb192be | 838 | mips_error ("write to target failed: %s", safe_strerror (errno)); |
33742334 | 839 | |
4704fd9c SG |
840 | if (! get_ack) |
841 | return; | |
842 | ||
33742334 ILT |
843 | garbage = 0; |
844 | ch = 0; | |
845 | while (1) | |
846 | { | |
847 | unsigned char hdr[HDR_LENGTH + 1]; | |
848 | unsigned char trlr[TRLR_LENGTH + 1]; | |
849 | int err; | |
ee455463 | 850 | unsigned int seq; |
33742334 ILT |
851 | |
852 | /* Get the packet header. If we time out, resend the data | |
853 | packet. */ | |
854 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
855 | if (err != 0) | |
856 | break; | |
857 | ||
858 | ch = 0; | |
859 | ||
860 | /* If we get a data packet, assume it is a duplicate and | |
861 | ignore it. FIXME: If the acknowledgement is lost, this | |
862 | data packet may be the packet the remote sends after the | |
863 | acknowledgement. */ | |
090d784a JSC |
864 | if (HDR_IS_DATA (hdr)) { |
865 | int i; | |
866 | ||
867 | /* Ignore any errors raised whilst attempting to ignore | |
868 | packet. */ | |
869 | ||
870 | len = HDR_GET_LEN (hdr); | |
871 | ||
872 | for (i = 0; i < len; i++) | |
873 | { | |
874 | int rch; | |
875 | ||
876 | rch = mips_readchar (2); | |
877 | if (rch == SYN) | |
878 | { | |
879 | ch = SYN; | |
880 | break; | |
881 | } | |
882 | if (rch == SERIAL_TIMEOUT) | |
883 | break; | |
884 | /* ignore the character */ | |
885 | } | |
886 | ||
887 | if (i == len) | |
888 | (void) mips_receive_trailer (trlr, &garbage, &ch, 2); | |
889 | ||
890 | /* We don't bother checking the checksum, or providing an | |
891 | ACK to the packet. */ | |
33742334 | 892 | continue; |
090d784a | 893 | } |
33742334 ILT |
894 | |
895 | /* If the length is not 0, this is a garbled packet. */ | |
896 | if (HDR_GET_LEN (hdr) != 0) | |
897 | continue; | |
898 | ||
899 | /* Get the packet trailer. */ | |
900 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
901 | mips_retransmit_wait); | |
902 | ||
903 | /* If we timed out, resend the data packet. */ | |
904 | if (err == -1) | |
905 | break; | |
906 | ||
907 | /* If we got a bad character, reread the header. */ | |
908 | if (err != 0) | |
909 | continue; | |
910 | ||
911 | /* If the checksum does not match the trailer checksum, this | |
912 | is a bad packet; ignore it. */ | |
913 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
914 | != TRLR_GET_CKSUM (trlr)) | |
915 | continue; | |
916 | ||
cd10c7e3 | 917 | if (remote_debug > 0) |
33742334 ILT |
918 | { |
919 | hdr[HDR_LENGTH] = '\0'; | |
920 | trlr[TRLR_LENGTH] = '\0'; | |
47d52968 JK |
921 | /* Don't use _filtered; we can't deal with a QUIT out of |
922 | target_wait, and I think this might be called from there. */ | |
923 | printf_unfiltered ("Got ack %d \"%s%s\"\n", | |
f63f30e2 | 924 | HDR_GET_SEQ (hdr), hdr + 1, trlr); |
33742334 ILT |
925 | } |
926 | ||
927 | /* If this ack is for the current packet, we're done. */ | |
928 | seq = HDR_GET_SEQ (hdr); | |
929 | if (seq == mips_send_seq) | |
930 | return; | |
931 | ||
932 | /* If this ack is for the last packet, resend the current | |
933 | packet. */ | |
934 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
935 | break; | |
936 | ||
937 | /* Otherwise this is a bad ack; ignore it. Increment the | |
938 | garbage count to ensure that we do not stay in this loop | |
939 | forever. */ | |
940 | ++garbage; | |
941 | } | |
942 | } | |
943 | ||
4fb192be | 944 | mips_error ("Remote did not acknowledge packet"); |
33742334 ILT |
945 | } |
946 | ||
947 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
948 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
949 | implies that only the sender retransmits packets, so this code just | |
950 | waits silently for a packet. It returns the length of the received | |
96e5f161 JK |
951 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, |
952 | don't print an error message and return -1. */ | |
33742334 ILT |
953 | |
954 | static int | |
4c6071f7 | 955 | mips_receive_packet (buff, throw_error, timeout) |
33742334 | 956 | char *buff; |
96e5f161 | 957 | int throw_error; |
4c6071f7 | 958 | int timeout; |
33742334 ILT |
959 | { |
960 | int ch; | |
961 | int garbage; | |
962 | int len; | |
963 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
964 | int cksum; | |
965 | ||
966 | ch = 0; | |
967 | garbage = 0; | |
968 | while (1) | |
969 | { | |
970 | unsigned char hdr[HDR_LENGTH]; | |
971 | unsigned char trlr[TRLR_LENGTH]; | |
972 | int i; | |
973 | int err; | |
974 | ||
4c6071f7 | 975 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) |
96e5f161 JK |
976 | { |
977 | if (throw_error) | |
978 | mips_error ("Timed out waiting for remote packet"); | |
979 | else | |
980 | return -1; | |
981 | } | |
33742334 ILT |
982 | |
983 | ch = 0; | |
984 | ||
985 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
986 | if (! HDR_IS_DATA (hdr)) | |
987 | { | |
090d784a JSC |
988 | len = HDR_GET_LEN (hdr); |
989 | /* Check if the length is valid for an ACK, we may aswell | |
990 | try and read the remainder of the packet: */ | |
991 | if (len == 0) | |
992 | { | |
993 | /* Ignore the error condition, since we are going to | |
994 | ignore the packet anyway. */ | |
995 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
996 | } | |
47d52968 JK |
997 | /* Don't use _filtered; we can't deal with a QUIT out of |
998 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 999 | if (remote_debug > 0) |
47d52968 | 1000 | printf_unfiltered ("Ignoring unexpected ACK\n"); |
33742334 ILT |
1001 | continue; |
1002 | } | |
1003 | ||
33742334 | 1004 | len = HDR_GET_LEN (hdr); |
33742334 ILT |
1005 | for (i = 0; i < len; i++) |
1006 | { | |
1007 | int rch; | |
1008 | ||
4c6071f7 | 1009 | rch = mips_readchar (timeout); |
33742334 ILT |
1010 | if (rch == SYN) |
1011 | { | |
1012 | ch = SYN; | |
1013 | break; | |
1014 | } | |
9a9a88c1 | 1015 | if (rch == SERIAL_TIMEOUT) |
96e5f161 JK |
1016 | { |
1017 | if (throw_error) | |
1018 | mips_error ("Timed out waiting for remote packet"); | |
1019 | else | |
1020 | return -1; | |
1021 | } | |
33742334 ILT |
1022 | buff[i] = rch; |
1023 | } | |
1024 | ||
1025 | if (i < len) | |
1026 | { | |
47d52968 JK |
1027 | /* Don't use _filtered; we can't deal with a QUIT out of |
1028 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 1029 | if (remote_debug > 0) |
47d52968 | 1030 | printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n", |
33742334 ILT |
1031 | i, len); |
1032 | continue; | |
1033 | } | |
1034 | ||
4c6071f7 | 1035 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); |
33742334 | 1036 | if (err == -1) |
96e5f161 JK |
1037 | { |
1038 | if (throw_error) | |
1039 | mips_error ("Timed out waiting for packet"); | |
1040 | else | |
1041 | return -1; | |
1042 | } | |
33742334 ILT |
1043 | if (err == -2) |
1044 | { | |
47d52968 JK |
1045 | /* Don't use _filtered; we can't deal with a QUIT out of |
1046 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 1047 | if (remote_debug > 0) |
47d52968 | 1048 | printf_unfiltered ("Got SYN when wanted trailer\n"); |
33742334 ILT |
1049 | continue; |
1050 | } | |
1051 | ||
090d784a JSC |
1052 | /* If this is the wrong sequence number, ignore it. */ |
1053 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1054 | { | |
1055 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1056 | target_wait, and I think this might be called from there. */ | |
1057 | if (remote_debug > 0) | |
1058 | printf_unfiltered ("Ignoring sequence number %d (want %d)\n", | |
1059 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
1060 | continue; | |
1061 | } | |
1062 | ||
33742334 | 1063 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) |
090d784a | 1064 | break; |
33742334 | 1065 | |
cd10c7e3 | 1066 | if (remote_debug > 0) |
47d52968 JK |
1067 | /* Don't use _filtered; we can't deal with a QUIT out of |
1068 | target_wait, and I think this might be called from there. */ | |
1069 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
33742334 ILT |
1070 | mips_cksum (hdr, buff, len), |
1071 | TRLR_GET_CKSUM (trlr)); | |
1072 | ||
1073 | /* The checksum failed. Send an acknowledgement for the | |
1074 | previous packet to tell the remote to resend the packet. */ | |
1075 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1076 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1077 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1078 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1079 | ||
1080 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1081 | ||
1082 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1083 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1084 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1085 | ||
cd10c7e3 | 1086 | if (remote_debug > 0) |
33742334 ILT |
1087 | { |
1088 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
1089 | /* Don't use _filtered; we can't deal with a QUIT out of |
1090 | target_wait, and I think this might be called from there. */ | |
1091 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
1092 | ack + 1); |
1093 | } | |
1094 | ||
9a9a88c1 | 1095 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
1096 | { |
1097 | if (throw_error) | |
1098 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1099 | else | |
1100 | return -1; | |
1101 | } | |
33742334 ILT |
1102 | } |
1103 | ||
cd10c7e3 | 1104 | if (remote_debug > 0) |
33742334 ILT |
1105 | { |
1106 | buff[len] = '\0'; | |
47d52968 JK |
1107 | /* Don't use _filtered; we can't deal with a QUIT out of |
1108 | target_wait, and I think this might be called from there. */ | |
1109 | printf_unfiltered ("Got packet \"%s\"\n", buff); | |
33742334 ILT |
1110 | } |
1111 | ||
1112 | /* We got the packet. Send an acknowledgement. */ | |
1113 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1114 | ||
1115 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1116 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1117 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1118 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1119 | ||
1120 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1121 | ||
1122 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1123 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1124 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1125 | ||
cd10c7e3 | 1126 | if (remote_debug > 0) |
33742334 ILT |
1127 | { |
1128 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
1129 | /* Don't use _filtered; we can't deal with a QUIT out of |
1130 | target_wait, and I think this might be called from there. */ | |
1131 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
1132 | ack + 1); |
1133 | } | |
1134 | ||
9a9a88c1 | 1135 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
1136 | { |
1137 | if (throw_error) | |
1138 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1139 | else | |
1140 | return -1; | |
1141 | } | |
33742334 ILT |
1142 | |
1143 | return len; | |
1144 | } | |
d6ca85a8 | 1145 | \f |
33742334 ILT |
1146 | /* Optionally send a request to the remote system and optionally wait |
1147 | for the reply. This implements the remote debugging protocol, | |
1148 | which is built on top of the packet protocol defined above. Each | |
1149 | request has an ADDR argument and a DATA argument. The following | |
1150 | requests are defined: | |
1151 | ||
1152 | \0 don't send a request; just wait for a reply | |
1153 | i read word from instruction space at ADDR | |
1154 | d read word from data space at ADDR | |
1155 | I write DATA to instruction space at ADDR | |
1156 | D write DATA to data space at ADDR | |
1157 | r read register number ADDR | |
1158 | R set register number ADDR to value DATA | |
1159 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1160 | s single step (if ADDR != 1, set pc to ADDR) | |
1161 | ||
1162 | The read requests return the value requested. The write requests | |
1163 | return the previous value in the changed location. The execution | |
1164 | requests return a UNIX wait value (the approximate signal which | |
1165 | caused execution to stop is in the upper eight bits). | |
1166 | ||
1167 | If PERR is not NULL, this function waits for a reply. If an error | |
1168 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1169 | target board reports. */ | |
1170 | ||
28444bf3 | 1171 | static CORE_ADDR |
cd10c7e3 SG |
1172 | mips_request (cmd, addr, data, perr, timeout, buff) |
1173 | int cmd; | |
28444bf3 DP |
1174 | CORE_ADDR addr; |
1175 | CORE_ADDR data; | |
33742334 | 1176 | int *perr; |
4c6071f7 | 1177 | int timeout; |
cd10c7e3 | 1178 | char *buff; |
33742334 | 1179 | { |
cd10c7e3 | 1180 | char myBuff[DATA_MAXLEN + 1]; |
33742334 ILT |
1181 | int len; |
1182 | int rpid; | |
1183 | char rcmd; | |
1184 | int rerrflg; | |
1185 | int rresponse; | |
4887063b | 1186 | |
cd10c7e3 SG |
1187 | if (buff == (char *) NULL) |
1188 | buff = myBuff; | |
1189 | ||
33742334 ILT |
1190 | if (cmd != '\0') |
1191 | { | |
1192 | if (mips_need_reply) | |
1193 | fatal ("mips_request: Trying to send command before reply"); | |
96431497 | 1194 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data)); |
c2a0f1cb | 1195 | mips_send_packet (buff, 1); |
33742334 ILT |
1196 | mips_need_reply = 1; |
1197 | } | |
1198 | ||
1199 | if (perr == (int *) NULL) | |
1200 | return 0; | |
1201 | ||
1202 | if (! mips_need_reply) | |
1203 | fatal ("mips_request: Trying to get reply before command"); | |
1204 | ||
1205 | mips_need_reply = 0; | |
1206 | ||
4c6071f7 | 1207 | len = mips_receive_packet (buff, 1, timeout); |
33742334 ILT |
1208 | buff[len] = '\0'; |
1209 | ||
1210 | if (sscanf (buff, "0x%x %c 0x%x 0x%x", | |
1211 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
33742334 | 1212 | || (cmd != '\0' && rcmd != cmd)) |
4fb192be | 1213 | mips_error ("Bad response from remote board"); |
33742334 ILT |
1214 | |
1215 | if (rerrflg != 0) | |
1216 | { | |
1217 | *perr = 1; | |
1218 | ||
1219 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
1220 | not be the same as errno values used on other systems. If | |
1221 | they stick to common errno values, they will be the same, but | |
1222 | if they don't, they must be translated. */ | |
1223 | errno = rresponse; | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | *perr = 0; | |
1229 | return rresponse; | |
1230 | } | |
1231 | ||
864df7e6 JK |
1232 | static void |
1233 | mips_initialize_cleanups (arg) | |
1234 | PTR arg; | |
1235 | { | |
1236 | mips_initializing = 0; | |
1237 | } | |
1238 | ||
7061bb0e MA |
1239 | static void |
1240 | mips_exit_cleanups (arg) | |
1241 | PTR arg; | |
1242 | { | |
1243 | mips_exiting = 0; | |
1244 | } | |
1245 | ||
090d784a JSC |
1246 | static void |
1247 | mips_send_command (cmd, prompt) | |
1248 | const char *cmd; | |
1249 | int prompt; | |
1250 | { | |
1251 | SERIAL_WRITE (mips_desc, cmd, strlen(cmd)); | |
1252 | mips_expect (cmd); | |
ee455463 | 1253 | mips_expect ("\n"); |
090d784a JSC |
1254 | if (prompt) |
1255 | mips_expect (mips_monitor_prompt); | |
1256 | } | |
1257 | ||
1258 | /* Enter remote (dbx) debug mode: */ | |
1259 | static void | |
1260 | mips_enter_debug () | |
1261 | { | |
1262 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1263 | mips_send_seq = 0; | |
1264 | mips_receive_seq = 0; | |
1265 | ||
7061bb0e | 1266 | if (mips_monitor != MON_IDT) |
ee455463 | 1267 | mips_send_command ("debug\r", 0); |
090d784a | 1268 | else /* assume IDT monitor by default */ |
ee455463 | 1269 | mips_send_command ("db tty0\r", 0); |
090d784a | 1270 | |
ee455463 | 1271 | SERIAL_WRITE (mips_desc, "\r", sizeof "\r" - 1); |
090d784a JSC |
1272 | |
1273 | /* We don't need to absorb any spurious characters here, since the | |
1274 | mips_receive_header will eat up a reasonable number of characters | |
1275 | whilst looking for the SYN, however this avoids the "garbage" | |
1276 | being displayed to the user. */ | |
7061bb0e | 1277 | if (mips_monitor != MON_IDT) |
ee455463 | 1278 | mips_expect ("\r"); |
090d784a JSC |
1279 | |
1280 | { | |
1281 | char buff[DATA_MAXLEN + 1]; | |
1282 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1283 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1288 | static int | |
1289 | mips_exit_debug () | |
1290 | { | |
1291 | int err; | |
7061bb0e | 1292 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); |
090d784a | 1293 | |
7061bb0e MA |
1294 | mips_exiting = 1; |
1295 | ||
1296 | if (mips_monitor != MON_IDT) | |
51328506 | 1297 | { |
7061bb0e MA |
1298 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, |
1299 | so we do not get a reply to this command: */ | |
51328506 | 1300 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, NULL, |
090d784a | 1301 | mips_receive_wait, NULL); |
51328506 JSC |
1302 | mips_need_reply = 0; |
1303 | if (!mips_expect (" break!")) | |
1304 | return -1; | |
1305 | } | |
1306 | else | |
1307 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, | |
1308 | mips_receive_wait, NULL); | |
090d784a | 1309 | |
db38473a | 1310 | if (mips_monitor == MON_IDT && !mips_expect ("Exiting remote debug")) |
090d784a JSC |
1311 | return -1; |
1312 | ||
5dad8312 | 1313 | if (mips_monitor == MON_DDB) |
51328506 | 1314 | { |
ee455463 | 1315 | if (!mips_expect ("\n")) |
51328506 JSC |
1316 | return -1; |
1317 | } | |
1318 | else | |
ee455463 | 1319 | if (!mips_expect ("\r\n")) |
51328506 | 1320 | return -1; |
090d784a JSC |
1321 | |
1322 | if (!mips_expect (mips_monitor_prompt)) | |
1323 | return -1; | |
1324 | ||
7061bb0e MA |
1325 | do_cleanups (old_cleanups); |
1326 | ||
090d784a JSC |
1327 | return 0; |
1328 | } | |
1329 | ||
c2a0f1cb ILT |
1330 | /* Initialize a new connection to the MIPS board, and make sure we are |
1331 | really connected. */ | |
1332 | ||
1333 | static void | |
1334 | mips_initialize () | |
1335 | { | |
c2a0f1cb | 1336 | int err; |
864df7e6 | 1337 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
188c635f | 1338 | int j; |
c2a0f1cb | 1339 | |
864df7e6 JK |
1340 | /* What is this code doing here? I don't see any way it can happen, and |
1341 | it might mean mips_initializing didn't get cleared properly. | |
1342 | So I'll make it a warning. */ | |
188c635f | 1343 | |
c2a0f1cb | 1344 | if (mips_initializing) |
864df7e6 JK |
1345 | { |
1346 | warning ("internal error: mips_initialize called twice"); | |
1347 | return; | |
1348 | } | |
c2a0f1cb | 1349 | |
cd10c7e3 | 1350 | mips_wait_flag = 0; |
c2a0f1cb ILT |
1351 | mips_initializing = 1; |
1352 | ||
188c635f SG |
1353 | /* At this point, the packit protocol isn't responding. We'll try getting |
1354 | into the monitor, and restarting the protocol. */ | |
4704fd9c | 1355 | |
090d784a JSC |
1356 | /* Force the system into the monitor. After this we *should* be at |
1357 | the mips_monitor_prompt. */ | |
7061bb0e | 1358 | if (mips_monitor != MON_IDT) |
090d784a JSC |
1359 | j = 0; /* start by checking if we are already at the prompt */ |
1360 | else | |
1361 | j = 1; /* start by sending a break */ | |
1362 | for (; j <= 4; j++) | |
188c635f SG |
1363 | { |
1364 | switch (j) | |
4704fd9c | 1365 | { |
090d784a JSC |
1366 | case 0: /* First, try sending a CR */ |
1367 | SERIAL_FLUSH_INPUT (mips_desc); | |
ee455463 | 1368 | SERIAL_WRITE (mips_desc, "\r", 1); |
090d784a | 1369 | break; |
188c635f SG |
1370 | case 1: /* First, try sending a break */ |
1371 | SERIAL_SEND_BREAK (mips_desc); | |
1372 | break; | |
1373 | case 2: /* Then, try a ^C */ | |
1374 | SERIAL_WRITE (mips_desc, "\003", 1); | |
1375 | break; | |
1376 | case 3: /* Then, try escaping from download */ | |
1377 | { | |
7061bb0e | 1378 | if (mips_monitor != MON_IDT) |
090d784a JSC |
1379 | { |
1380 | char tbuff[7]; | |
1381 | ||
1382 | /* We shouldn't need to send multiple termination | |
1383 | sequences, since the target performs line (or | |
1384 | block) reads, and then processes those | |
1385 | packets. In-case we were downloading a large packet | |
1386 | we flush the output buffer before inserting a | |
1387 | termination sequence. */ | |
1388 | SERIAL_FLUSH_OUTPUT (mips_desc); | |
ee455463 | 1389 | sprintf (tbuff, "\r/E/E\r"); |
090d784a JSC |
1390 | SERIAL_WRITE (mips_desc, tbuff, 6); |
1391 | } | |
1392 | else | |
1393 | { | |
1394 | char srec[10]; | |
1395 | int i; | |
1396 | ||
1397 | /* We are possibly in binary download mode, having | |
1398 | aborted in the middle of an S-record. ^C won't | |
1399 | work because of binary mode. The only reliable way | |
1400 | out is to send enough termination packets (8 bytes) | |
1401 | to fill up and then overflow the largest size | |
1402 | S-record (255 bytes in this case). This amounts to | |
1403 | 256/8 + 1 packets. | |
1404 | */ | |
1405 | ||
1406 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1407 | ||
1408 | for (i = 1; i <= 33; i++) | |
1409 | { | |
1410 | SERIAL_WRITE (mips_desc, srec, 8); | |
1411 | ||
1412 | if (SERIAL_READCHAR (mips_desc, 0) >= 0) | |
1413 | break; /* Break immediatly if we get something from | |
4704fd9c | 1414 | the board. */ |
090d784a JSC |
1415 | } |
1416 | } | |
1417 | } | |
afb69487 | 1418 | break; |
8b07d12c | 1419 | case 4: |
afb69487 | 1420 | mips_error ("Failed to initialize."); |
4704fd9c SG |
1421 | } |
1422 | ||
090d784a | 1423 | if (mips_expect (mips_monitor_prompt)) |
afb69487 | 1424 | break; |
c2a0f1cb | 1425 | } |
afb69487 | 1426 | |
7061bb0e | 1427 | if (mips_monitor != MON_IDT) |
090d784a JSC |
1428 | { |
1429 | /* Ensure the correct target state: */ | |
266454ca MA |
1430 | if (mips_monitor != MON_LSI) |
1431 | mips_send_command ("set regsize 64\r", -1); | |
ee455463 MA |
1432 | mips_send_command ("set hostport tty0\r", -1); |
1433 | mips_send_command ("set brkcmd \"\"\r", -1); | |
090d784a | 1434 | /* Delete all the current breakpoints: */ |
ee455463 | 1435 | mips_send_command ("db *\r", -1); |
090d784a JSC |
1436 | /* NOTE: PMON does not have breakpoint support through the |
1437 | "debug" mode, only at the monitor command-line. */ | |
1438 | } | |
afb69487 | 1439 | |
090d784a | 1440 | mips_enter_debug (); |
c2a0f1cb | 1441 | |
090d784a | 1442 | /* Clear all breakpoints: */ |
7061bb0e MA |
1443 | if (mips_monitor == MON_IDT && common_breakpoint ('b', -1, 0, NULL) == 0) |
1444 | monitor_supports_breakpoints = 1; | |
cd10c7e3 | 1445 | else |
7061bb0e | 1446 | monitor_supports_breakpoints = 0; |
cd10c7e3 | 1447 | |
864df7e6 | 1448 | do_cleanups (old_cleanups); |
c2a0f1cb ILT |
1449 | |
1450 | /* If this doesn't call error, we have connected; we don't care if | |
1451 | the request itself succeeds or fails. */ | |
188c635f | 1452 | |
4c6071f7 | 1453 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err, |
cd10c7e3 SG |
1454 | mips_receive_wait, NULL); |
1455 | set_current_frame (create_new_frame (read_fp (), read_pc ())); | |
1456 | select_frame (get_current_frame (), 0); | |
c2a0f1cb ILT |
1457 | } |
1458 | ||
33742334 | 1459 | /* Open a connection to the remote board. */ |
33742334 | 1460 | static void |
8e493b61 | 1461 | common_open (ops, name, from_tty, new_monitor, new_monitor_prompt) |
090d784a | 1462 | struct target_ops *ops; |
33742334 ILT |
1463 | char *name; |
1464 | int from_tty; | |
8e493b61 MA |
1465 | enum mips_monitor_type new_monitor; |
1466 | char *new_monitor_prompt; | |
33742334 | 1467 | { |
ae55bdbc | 1468 | char *ptype; |
ee455463 MA |
1469 | char *serial_port_name; |
1470 | char *remote_name = 0; | |
1471 | char *local_name = 0; | |
1472 | char **argv; | |
ae55bdbc | 1473 | |
33742334 ILT |
1474 | if (name == 0) |
1475 | error ( | |
1476 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ | |
ee455463 MA |
1477 | device is attached to the target board (e.g., /dev/ttya).\n" |
1478 | "If you want to use TFTP to download to the board, specify the name of a\n" | |
1479 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1480 | "This filename must be in the form host:filename, where host is the name\n" | |
1481 | "of the host running the TFTP server, and the file must be readable by the\n" | |
214e9692 MA |
1482 | "world. If the local name of the temporary file differs from the name as\n" |
1483 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
ee455463 MA |
1484 | |
1485 | /* Parse the serial port name, the optional TFTP name, and the | |
1486 | optional local TFTP name. */ | |
1487 | if ((argv = buildargv (name)) == NULL) | |
1488 | nomem(0); | |
1489 | make_cleanup (freeargv, (char *) argv); | |
1490 | ||
1491 | serial_port_name = strsave (argv[0]); | |
1492 | if (argv[1]) /* remote TFTP name specified? */ | |
1493 | { | |
1494 | remote_name = argv[1]; | |
1495 | if (argv[2]) /* local TFTP filename specified? */ | |
1496 | local_name = argv[2]; | |
1497 | } | |
33742334 ILT |
1498 | |
1499 | target_preopen (from_tty); | |
1500 | ||
1501 | if (mips_is_open) | |
090d784a | 1502 | unpush_target (current_ops); |
33742334 | 1503 | |
ee455463 MA |
1504 | /* Open and initialize the serial port. */ |
1505 | mips_desc = SERIAL_OPEN (serial_port_name); | |
9a9a88c1 | 1506 | if (mips_desc == (serial_t) NULL) |
ee455463 | 1507 | perror_with_name (serial_port_name); |
33742334 | 1508 | |
d48d9a28 KH |
1509 | if (baud_rate != -1) |
1510 | { | |
1511 | if (SERIAL_SETBAUDRATE (mips_desc, baud_rate)) | |
1512 | { | |
1513 | SERIAL_CLOSE (mips_desc); | |
ee455463 | 1514 | perror_with_name (serial_port_name); |
d48d9a28 KH |
1515 | } |
1516 | } | |
1517 | ||
1724c671 SG |
1518 | SERIAL_RAW (mips_desc); |
1519 | ||
ee455463 MA |
1520 | /* Open and initialize the optional download port. If it is in the form |
1521 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1522 | hostname:filename, assume it's the TFTP filename that must be | |
1523 | passed to the DDB board to tell it where to get the load file. */ | |
1524 | if (remote_name) | |
1525 | { | |
1526 | if (strchr (remote_name, '#')) | |
1527 | { | |
1528 | udp_desc = SERIAL_OPEN (remote_name); | |
1529 | if (!udp_desc) | |
1530 | perror_with_name ("Unable to open UDP port"); | |
1531 | udp_in_use = 1; | |
1532 | } | |
1533 | else | |
1534 | { | |
1535 | /* Save the remote and local names of the TFTP temp file. If | |
1536 | the user didn't specify a local name, assume it's the same | |
1537 | as the part of the remote name after the "host:". */ | |
1538 | if (tftp_name) | |
1539 | free (tftp_name); | |
1540 | if (tftp_localname) | |
1541 | free (tftp_localname); | |
1542 | if (local_name == NULL) | |
1543 | if ((local_name = strchr (remote_name, ':')) != NULL) | |
1544 | local_name++; /* skip over the colon */ | |
1545 | if (local_name == NULL) | |
1546 | local_name = remote_name; /* local name same as remote name */ | |
1547 | tftp_name = strsave (remote_name); | |
1548 | tftp_localname = strsave (local_name); | |
1549 | tftp_in_use = 1; | |
1550 | } | |
1551 | } | |
1552 | ||
090d784a | 1553 | current_ops = ops; |
33742334 ILT |
1554 | mips_is_open = 1; |
1555 | ||
8e493b61 MA |
1556 | /* Reset the expected monitor prompt if it's never been set before. */ |
1557 | if (mips_monitor_prompt == NULL) | |
1558 | mips_monitor_prompt = strsave (new_monitor_prompt); | |
1559 | mips_monitor = new_monitor; | |
1560 | ||
c2a0f1cb | 1561 | mips_initialize (); |
33742334 ILT |
1562 | |
1563 | if (from_tty) | |
ee455463 | 1564 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); |
ae55bdbc SS |
1565 | |
1566 | /* Switch to using remote target now. */ | |
090d784a | 1567 | push_target (ops); |
33742334 | 1568 | |
c2a0f1cb | 1569 | /* FIXME: Should we call start_remote here? */ |
ae55bdbc SS |
1570 | |
1571 | /* Try to figure out the processor model if possible. */ | |
1572 | ptype = mips_read_processor_type (); | |
1573 | if (ptype) | |
1574 | mips_set_processor_type_command (strsave (ptype), 0); | |
4887063b SG |
1575 | |
1576 | /* This is really the job of start_remote however, that makes an assumption | |
1577 | that the target is about to print out a status message of some sort. That | |
1578 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
1579 | send the appropriate packet). */ | |
1580 | ||
1581 | flush_cached_frames (); | |
1582 | registers_changed (); | |
1583 | stop_pc = read_pc (); | |
1584 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
1585 | select_frame (get_current_frame (), 0); | |
1586 | print_stack_frame (selected_frame, -1, 1); | |
ee455463 | 1587 | free (serial_port_name); |
33742334 ILT |
1588 | } |
1589 | ||
090d784a JSC |
1590 | static void |
1591 | mips_open (name, from_tty) | |
1592 | char *name; | |
1593 | int from_tty; | |
1594 | { | |
8e493b61 | 1595 | common_open (&mips_ops, name, from_tty, MON_IDT, TARGET_MONITOR_PROMPT); |
090d784a JSC |
1596 | } |
1597 | ||
1598 | static void | |
1599 | pmon_open (name, from_tty) | |
1600 | char *name; | |
1601 | int from_tty; | |
1602 | { | |
8e493b61 | 1603 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); |
090d784a JSC |
1604 | } |
1605 | ||
51328506 | 1606 | static void |
5dad8312 | 1607 | ddb_open (name, from_tty) |
51328506 JSC |
1608 | char *name; |
1609 | int from_tty; | |
1610 | { | |
8e493b61 | 1611 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); |
51328506 | 1612 | } |
090d784a | 1613 | |
7061bb0e MA |
1614 | static void |
1615 | lsi_open (name, from_tty) | |
1616 | char *name; | |
1617 | int from_tty; | |
1618 | { | |
8e493b61 | 1619 | common_open (&ddb_ops, name, from_tty, MON_LSI, "PMON> "); |
7061bb0e MA |
1620 | } |
1621 | ||
33742334 ILT |
1622 | /* Close a connection to the remote board. */ |
1623 | ||
1624 | static void | |
1625 | mips_close (quitting) | |
1626 | int quitting; | |
1627 | { | |
1628 | if (mips_is_open) | |
1629 | { | |
1630 | /* Get the board out of remote debugging mode. */ | |
090d784a | 1631 | (void) mips_exit_debug (); |
c2a0f1cb | 1632 | |
ee455463 | 1633 | close_ports (); |
33742334 ILT |
1634 | } |
1635 | } | |
1636 | ||
1637 | /* Detach from the remote board. */ | |
1638 | ||
1639 | static void | |
1640 | mips_detach (args, from_tty) | |
1641 | char *args; | |
1642 | int from_tty; | |
1643 | { | |
1644 | if (args) | |
1645 | error ("Argument given to \"detach\" when remotely debugging."); | |
1646 | ||
1647 | pop_target (); | |
cd10c7e3 SG |
1648 | |
1649 | mips_close (1); | |
1650 | ||
33742334 | 1651 | if (from_tty) |
199b2450 | 1652 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
33742334 ILT |
1653 | } |
1654 | ||
1655 | /* Tell the target board to resume. This does not wait for a reply | |
1656 | from the board. */ | |
1657 | ||
1658 | static void | |
25286543 | 1659 | mips_resume (pid, step, siggnal) |
67ac9759 JK |
1660 | int pid, step; |
1661 | enum target_signal siggnal; | |
33742334 | 1662 | { |
266454ca | 1663 | int err; |
cd10c7e3 SG |
1664 | |
1665 | /* start-sanitize-gm */ | |
188c635f | 1666 | #ifndef GENERAL_MAGIC |
67ac9759 JK |
1667 | if (siggnal != TARGET_SIGNAL_0) |
1668 | warning | |
1669 | ("Can't send signals to a remote system. Try `handle %s ignore'.", | |
1670 | target_signal_to_name (siggnal)); | |
188c635f | 1671 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 1672 | /* end-sanitize-gm */ |
33742334 | 1673 | |
266454ca MA |
1674 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after |
1675 | a single step, so we wait for that. */ | |
33742334 | 1676 | mips_request (step ? 's' : 'c', |
c2a0f1cb | 1677 | (unsigned int) 1, |
cd10c7e3 | 1678 | (unsigned int) siggnal, |
266454ca | 1679 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
cd10c7e3 | 1680 | mips_receive_wait, NULL); |
33742334 ILT |
1681 | } |
1682 | ||
f3fe8934 JK |
1683 | /* Return the signal corresponding to SIG, where SIG is the number which |
1684 | the MIPS protocol uses for the signal. */ | |
1685 | enum target_signal | |
1686 | mips_signal_from_protocol (sig) | |
1687 | int sig; | |
1688 | { | |
1689 | /* We allow a few more signals than the IDT board actually returns, on | |
1690 | the theory that there is at least *some* hope that perhaps the numbering | |
1691 | for these signals is widely agreed upon. */ | |
1692 | if (sig <= 0 | |
1693 | || sig > 31) | |
1694 | return TARGET_SIGNAL_UNKNOWN; | |
1695 | ||
1696 | /* Don't want to use target_signal_from_host because we are converting | |
1697 | from MIPS signal numbers, not host ones. Our internal numbers | |
1698 | match the MIPS numbers for the signals the board can return, which | |
1699 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1700 | return (enum target_signal) sig; | |
1701 | } | |
1702 | ||
33742334 ILT |
1703 | /* Wait until the remote stops, and return a wait status. */ |
1704 | ||
1705 | static int | |
f7fa951f DZ |
1706 | mips_wait (pid, status) |
1707 | int pid; | |
67ac9759 | 1708 | struct target_waitstatus *status; |
33742334 ILT |
1709 | { |
1710 | int rstatus; | |
1711 | int err; | |
cd10c7e3 SG |
1712 | char buff[DATA_MAXLEN]; |
1713 | int rpc, rfp, rsp; | |
1714 | char flags[20]; | |
1715 | int nfields; | |
1716 | ||
1717 | interrupt_count = 0; | |
1718 | hit_watchpoint = 0; | |
33742334 ILT |
1719 | |
1720 | /* If we have not sent a single step or continue command, then the | |
1721 | board is waiting for us to do something. Return a status | |
1722 | indicating that it is stopped. */ | |
1723 | if (! mips_need_reply) | |
1724 | { | |
67ac9759 JK |
1725 | status->kind = TARGET_WAITKIND_STOPPED; |
1726 | status->value.sig = TARGET_SIGNAL_TRAP; | |
33742334 ILT |
1727 | return 0; |
1728 | } | |
1729 | ||
4c6071f7 | 1730 | /* No timeout; we sit here as long as the program continues to execute. */ |
cd10c7e3 SG |
1731 | mips_wait_flag = 1; |
1732 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1733 | buff); | |
1734 | mips_wait_flag = 0; | |
33742334 | 1735 | if (err) |
4fb192be | 1736 | mips_error ("Remote failure: %s", safe_strerror (errno)); |
33742334 | 1737 | |
cd10c7e3 SG |
1738 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", |
1739 | &rpc, &rfp, &rsp, flags); | |
1740 | ||
1741 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1742 | ||
1743 | if (nfields == 7 || nfields == 9) | |
1744 | { | |
1745 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1746 | ||
1747 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc); | |
1748 | supply_register (PC_REGNUM, buf); | |
1749 | ||
1750 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp); | |
1751 | supply_register (30, buf); /* This register they are avoiding and so it is unnamed */ | |
1752 | ||
1753 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp); | |
1754 | supply_register (SP_REGNUM, buf); | |
1755 | ||
1756 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0); | |
1757 | supply_register (FP_REGNUM, buf); | |
1758 | ||
1759 | if (nfields == 9) | |
1760 | { | |
1761 | int i; | |
1762 | ||
1763 | for (i = 0; i <= 2; i++) | |
1764 | if (flags[i] == 'r' || flags[i] == 'w') | |
1765 | hit_watchpoint = 1; | |
1766 | else if (flags[i] == '\000') | |
1767 | break; | |
1768 | } | |
1769 | } | |
1770 | ||
67ac9759 JK |
1771 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG |
1772 | and so on, because the constants we want here are determined by the | |
1773 | MIPS protocol and have nothing to do with what host we are running on. */ | |
6397809b | 1774 | if ((rstatus & 0377) == 0) |
67ac9759 JK |
1775 | { |
1776 | status->kind = TARGET_WAITKIND_EXITED; | |
1777 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1778 | } | |
6397809b | 1779 | else if ((rstatus & 0377) == 0177) |
67ac9759 | 1780 | { |
5efb3899 | 1781 | status->kind = TARGET_WAITKIND_STOPPED; |
f3fe8934 | 1782 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); |
67ac9759 JK |
1783 | } |
1784 | else | |
1785 | { | |
1786 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
f3fe8934 | 1787 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); |
67ac9759 | 1788 | } |
33742334 ILT |
1789 | |
1790 | return 0; | |
1791 | } | |
1792 | ||
090d784a JSC |
1793 | static int |
1794 | pmon_wait (pid, status) | |
1795 | int pid; | |
1796 | struct target_waitstatus *status; | |
1797 | { | |
1798 | int rstatus; | |
1799 | int err; | |
1800 | char buff[DATA_MAXLEN]; | |
1801 | ||
1802 | interrupt_count = 0; | |
1803 | hit_watchpoint = 0; | |
1804 | ||
1805 | /* If we have not sent a single step or continue command, then the | |
1806 | board is waiting for us to do something. Return a status | |
1807 | indicating that it is stopped. */ | |
1808 | if (! mips_need_reply) | |
1809 | { | |
1810 | status->kind = TARGET_WAITKIND_STOPPED; | |
1811 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1812 | return 0; | |
1813 | } | |
1814 | ||
1815 | /* Sit, polling the serial until the target decides to talk to | |
1816 | us. NOTE: the timeout value we use is used not just for the | |
1817 | first character, but for all the characters. */ | |
1818 | mips_wait_flag = 1; | |
1819 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1820 | buff); | |
1821 | mips_wait_flag = 0; | |
1822 | if (err) | |
1823 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1824 | ||
1825 | /* NOTE: The following (sig) numbers are defined by PMON: | |
1826 | SPP_SIGTRAP 5 breakpoint | |
1827 | SPP_SIGINT 2 | |
1828 | SPP_SIGSEGV 11 | |
1829 | SPP_SIGBUS 10 | |
1830 | SPP_SIGILL 4 | |
1831 | SPP_SIGFPE 8 | |
1832 | SPP_SIGTERM 15 */ | |
1833 | ||
1834 | /* On returning from a continue, the PMON monitor seems to start | |
1835 | echoing back the messages we send prior to sending back the | |
1836 | ACK. The code can cope with this, but to try and avoid the | |
1837 | unnecessary serial traffic, and "spurious" characters displayed | |
1838 | to the user, we cheat and reset the debug protocol. The problems | |
1839 | seems to be caused by a check on the number of arguments, and the | |
1840 | command length, within the monitor causing it to echo the command | |
1841 | as a bad packet. */ | |
266454ca | 1842 | if (mips_monitor != MON_DDB && mips_monitor != MON_LSI) |
1db0c2f7 JSC |
1843 | { |
1844 | mips_exit_debug (); | |
1845 | mips_enter_debug (); | |
1846 | } | |
090d784a JSC |
1847 | |
1848 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1849 | and so on, because the constants we want here are determined by the | |
1850 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1851 | if ((rstatus & 0377) == 0) | |
1852 | { | |
1853 | status->kind = TARGET_WAITKIND_EXITED; | |
1854 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1855 | } | |
1856 | else if ((rstatus & 0377) == 0177) | |
1857 | { | |
1858 | status->kind = TARGET_WAITKIND_STOPPED; | |
1859 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); | |
1860 | } | |
1861 | else | |
1862 | { | |
1863 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1864 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); | |
1865 | } | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
33742334 ILT |
1870 | /* We have to map between the register numbers used by gdb and the |
1871 | register numbers used by the debugging protocol. This function | |
1872 | assumes that we are using tm-mips.h. */ | |
1873 | ||
1874 | #define REGNO_OFFSET 96 | |
1875 | ||
1876 | static int | |
1877 | mips_map_regno (regno) | |
1878 | int regno; | |
1879 | { | |
1880 | if (regno < 32) | |
1881 | return regno; | |
1882 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
1883 | return regno - FP0_REGNUM + 32; | |
1884 | switch (regno) | |
1885 | { | |
1886 | case PC_REGNUM: | |
1887 | return REGNO_OFFSET + 0; | |
1888 | case CAUSE_REGNUM: | |
1889 | return REGNO_OFFSET + 1; | |
1890 | case HI_REGNUM: | |
1891 | return REGNO_OFFSET + 2; | |
1892 | case LO_REGNUM: | |
1893 | return REGNO_OFFSET + 3; | |
1894 | case FCRCS_REGNUM: | |
1895 | return REGNO_OFFSET + 4; | |
1896 | case FCRIR_REGNUM: | |
1897 | return REGNO_OFFSET + 5; | |
1898 | default: | |
1899 | /* FIXME: Is there a way to get the status register? */ | |
1900 | return 0; | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | /* Fetch the remote registers. */ | |
1905 | ||
1906 | static void | |
1907 | mips_fetch_registers (regno) | |
1908 | int regno; | |
1909 | { | |
ee455463 | 1910 | unsigned LONGEST val; |
33742334 ILT |
1911 | int err; |
1912 | ||
1913 | if (regno == -1) | |
1914 | { | |
1915 | for (regno = 0; regno < NUM_REGS; regno++) | |
1916 | mips_fetch_registers (regno); | |
1917 | return; | |
1918 | } | |
1919 | ||
021b10e3 JK |
1920 | if (regno == FP_REGNUM || regno == ZERO_REGNUM) |
1921 | /* FP_REGNUM on the mips is a hack which is just supposed to read | |
1922 | zero (see also mips-nat.c). */ | |
1923 | val = 0; | |
1924 | else | |
1925 | { | |
266454ca MA |
1926 | /* If PMON doesn't support this register, don't waste serial |
1927 | bandwidth trying to read it. */ | |
1928 | int pmon_reg = mips_map_regno (regno); | |
1929 | if (regno != 0 && pmon_reg == 0) | |
1930 | val = 0; | |
090d784a | 1931 | else |
266454ca MA |
1932 | { |
1933 | /* Unfortunately the PMON version in the Vr4300 board has been | |
1934 | compiled without the 64bit register access commands. This | |
1935 | means we cannot get hold of the full register width. */ | |
1936 | if (mips_monitor == MON_DDB) | |
1937 | val = (unsigned)mips_request ('t', (unsigned int) pmon_reg, | |
1938 | (unsigned int) 0, &err, mips_receive_wait, NULL); | |
1939 | else | |
1940 | val = mips_request ('r', (unsigned int) pmon_reg, | |
1941 | (unsigned int) 0, &err, mips_receive_wait, NULL); | |
1942 | if (err) | |
1943 | mips_error ("Can't read register %d: %s", regno, | |
1944 | safe_strerror (errno)); | |
1945 | } | |
021b10e3 | 1946 | } |
33742334 | 1947 | |
34df79fc JK |
1948 | { |
1949 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1950 | ||
1951 | /* We got the number the register holds, but gdb expects to see a | |
1952 | value in the target byte ordering. */ | |
1953 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val); | |
1954 | supply_register (regno, buf); | |
1955 | } | |
33742334 ILT |
1956 | } |
1957 | ||
1958 | /* Prepare to store registers. The MIPS protocol can store individual | |
1959 | registers, so this function doesn't have to do anything. */ | |
1960 | ||
1961 | static void | |
1962 | mips_prepare_to_store () | |
1963 | { | |
1964 | } | |
1965 | ||
1966 | /* Store remote register(s). */ | |
1967 | ||
1968 | static void | |
1969 | mips_store_registers (regno) | |
1970 | int regno; | |
1971 | { | |
1972 | int err; | |
1973 | ||
1974 | if (regno == -1) | |
1975 | { | |
1976 | for (regno = 0; regno < NUM_REGS; regno++) | |
1977 | mips_store_registers (regno); | |
1978 | return; | |
1979 | } | |
1980 | ||
1981 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
28444bf3 | 1982 | read_register (regno), |
cd10c7e3 | 1983 | &err, mips_receive_wait, NULL); |
33742334 | 1984 | if (err) |
4fb192be | 1985 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); |
33742334 ILT |
1986 | } |
1987 | ||
1988 | /* Fetch a word from the target board. */ | |
1989 | ||
28444bf3 | 1990 | static unsigned int |
33742334 ILT |
1991 | mips_fetch_word (addr) |
1992 | CORE_ADDR addr; | |
1993 | { | |
28444bf3 | 1994 | unsigned int val; |
33742334 ILT |
1995 | int err; |
1996 | ||
28444bf3 DP |
1997 | /* FIXME! addr was cast to uint! */ |
1998 | val = mips_request ('d', addr, (unsigned int) 0, &err, | |
cd10c7e3 | 1999 | mips_receive_wait, NULL); |
33742334 ILT |
2000 | if (err) |
2001 | { | |
2002 | /* Data space failed; try instruction space. */ | |
28444bf3 DP |
2003 | /* FIXME! addr was cast to uint! */ |
2004 | val = mips_request ('i', addr, (unsigned int) 0, &err, | |
cd10c7e3 | 2005 | mips_receive_wait, NULL); |
33742334 | 2006 | if (err) |
28444bf3 | 2007 | mips_error ("Can't read address 0x%s: %s", |
96431497 | 2008 | paddr_nz (addr), safe_strerror (errno)); |
33742334 ILT |
2009 | } |
2010 | return val; | |
2011 | } | |
2012 | ||
aa56c716 JK |
2013 | /* Store a word to the target board. Returns errno code or zero for |
2014 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2015 | memory location there. */ | |
33742334 | 2016 | |
28444bf3 | 2017 | /* FIXME! make sure only 32-bit quantities get stored! */ |
aa56c716 JK |
2018 | static int |
2019 | mips_store_word (addr, val, old_contents) | |
33742334 | 2020 | CORE_ADDR addr; |
28444bf3 | 2021 | unsigned int val; |
aa56c716 | 2022 | char *old_contents; |
33742334 ILT |
2023 | { |
2024 | int err; | |
aa56c716 | 2025 | unsigned int oldcontents; |
33742334 | 2026 | |
28444bf3 | 2027 | oldcontents = mips_request ('D', addr, (unsigned int) val, |
aa56c716 | 2028 | &err, |
cd10c7e3 | 2029 | mips_receive_wait, NULL); |
33742334 ILT |
2030 | if (err) |
2031 | { | |
2032 | /* Data space failed; try instruction space. */ | |
28444bf3 | 2033 | oldcontents = mips_request ('I', addr, |
aa56c716 | 2034 | (unsigned int) val, &err, |
cd10c7e3 | 2035 | mips_receive_wait, NULL); |
33742334 | 2036 | if (err) |
aa56c716 | 2037 | return errno; |
33742334 | 2038 | } |
aa56c716 JK |
2039 | if (old_contents != NULL) |
2040 | store_unsigned_integer (old_contents, 4, oldcontents); | |
2041 | return 0; | |
33742334 ILT |
2042 | } |
2043 | ||
2044 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2045 | transferring to or from debugger address MYADDR. Write to inferior | |
2046 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2047 | read; 0 for error. Note that protocol gives us the correct value | |
2048 | for a longword, since it transfers values in ASCII. We want the | |
2049 | byte values, so we have to swap the longword values. */ | |
2050 | ||
2051 | static int | |
2052 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
2053 | CORE_ADDR memaddr; | |
2054 | char *myaddr; | |
2055 | int len; | |
2056 | int write; | |
2057 | struct target_ops *ignore; | |
2058 | { | |
2059 | register int i; | |
2060 | /* Round starting address down to longword boundary. */ | |
2061 | register CORE_ADDR addr = memaddr &~ 3; | |
2062 | /* Round ending address up; get number of longwords that makes. */ | |
2063 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
2064 | /* Allocate buffer of that many longwords. */ | |
34df79fc | 2065 | register char *buffer = alloca (count * 4); |
33742334 | 2066 | |
aa56c716 JK |
2067 | int status; |
2068 | ||
33742334 ILT |
2069 | if (write) |
2070 | { | |
2071 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2072 | if (addr != memaddr || len < 4) | |
2073 | { | |
2074 | /* Need part of initial word -- fetch it. */ | |
34df79fc | 2075 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); |
33742334 ILT |
2076 | } |
2077 | ||
34df79fc | 2078 | if (count > 1) |
33742334 | 2079 | { |
34df79fc JK |
2080 | /* Need part of last word -- fetch it. FIXME: we do this even |
2081 | if we don't need it. */ | |
2082 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
2083 | mips_fetch_word (addr + (count - 1) * 4)); | |
33742334 ILT |
2084 | } |
2085 | ||
2086 | /* Copy data to be written over corresponding part of buffer */ | |
2087 | ||
2088 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2089 | ||
2090 | /* Write the entire buffer. */ | |
2091 | ||
2092 | for (i = 0; i < count; i++, addr += 4) | |
2093 | { | |
aa56c716 JK |
2094 | status = mips_store_word (addr, |
2095 | extract_unsigned_integer (&buffer[i*4], 4), | |
2096 | NULL); | |
7d13174e SS |
2097 | /* Report each kilobyte (we download 32-bit words at a time) */ |
2098 | if (i % 256 == 255) | |
2099 | { | |
2100 | printf_unfiltered ("*"); | |
2101 | fflush (stdout); | |
2102 | } | |
aa56c716 JK |
2103 | if (status) |
2104 | { | |
2105 | errno = status; | |
2106 | return 0; | |
2107 | } | |
34df79fc | 2108 | /* FIXME: Do we want a QUIT here? */ |
33742334 | 2109 | } |
7d13174e SS |
2110 | if (count >= 256) |
2111 | printf_unfiltered ("\n"); | |
33742334 ILT |
2112 | } |
2113 | else | |
2114 | { | |
2115 | /* Read all the longwords */ | |
2116 | for (i = 0; i < count; i++, addr += 4) | |
2117 | { | |
34df79fc | 2118 | store_unsigned_integer (&buffer[i*4], 4, mips_fetch_word (addr)); |
33742334 ILT |
2119 | QUIT; |
2120 | } | |
2121 | ||
2122 | /* Copy appropriate bytes out of the buffer. */ | |
34df79fc | 2123 | memcpy (myaddr, buffer + (memaddr & 3), len); |
33742334 ILT |
2124 | } |
2125 | return len; | |
2126 | } | |
2127 | ||
2128 | /* Print info on this target. */ | |
2129 | ||
2130 | static void | |
2131 | mips_files_info (ignore) | |
2132 | struct target_ops *ignore; | |
2133 | { | |
199b2450 | 2134 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); |
33742334 ILT |
2135 | } |
2136 | ||
c2a0f1cb ILT |
2137 | /* Kill the process running on the board. This will actually only |
2138 | work if we are doing remote debugging over the console input. I | |
2139 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2140 | right port, we could interrupt the process with a break signal. */ | |
2141 | ||
2142 | static void | |
2143 | mips_kill () | |
2144 | { | |
cd10c7e3 SG |
2145 | if (!mips_wait_flag) |
2146 | return; | |
2147 | ||
2148 | interrupt_count++; | |
2149 | ||
2150 | if (interrupt_count >= 2) | |
2151 | { | |
2152 | interrupt_count = 0; | |
2153 | ||
2154 | target_terminal_ours (); | |
2155 | ||
2156 | if (query ("Interrupted while waiting for the program.\n\ | |
2157 | Give up (and stop debugging it)? ")) | |
2158 | { | |
2159 | /* Clean up in such a way that mips_close won't try to talk to the | |
2160 | board (it almost surely won't work since we weren't able to talk to | |
2161 | it). */ | |
2162 | mips_wait_flag = 0; | |
ee455463 | 2163 | close_ports(); |
cd10c7e3 SG |
2164 | |
2165 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2166 | target_mourn_inferior (); | |
2167 | ||
2168 | return_to_top_level (RETURN_QUIT); | |
2169 | } | |
2170 | ||
2171 | target_terminal_inferior (); | |
2172 | } | |
2173 | ||
2174 | if (remote_debug > 0) | |
2175 | printf_unfiltered ("Sending break\n"); | |
2176 | ||
2177 | SERIAL_SEND_BREAK (mips_desc); | |
2178 | ||
c2a0f1cb ILT |
2179 | #if 0 |
2180 | if (mips_is_open) | |
2181 | { | |
2182 | char cc; | |
2183 | ||
2184 | /* Send a ^C. */ | |
2185 | cc = '\003'; | |
1724c671 | 2186 | SERIAL_WRITE (mips_desc, &cc, 1); |
c2a0f1cb ILT |
2187 | sleep (1); |
2188 | target_mourn_inferior (); | |
2189 | } | |
2190 | #endif | |
2191 | } | |
2192 | ||
33742334 ILT |
2193 | /* Start running on the target board. */ |
2194 | ||
2195 | static void | |
2196 | mips_create_inferior (execfile, args, env) | |
2197 | char *execfile; | |
2198 | char *args; | |
2199 | char **env; | |
2200 | { | |
2201 | CORE_ADDR entry_pt; | |
2202 | ||
33742334 | 2203 | if (args && *args) |
aa56c716 JK |
2204 | { |
2205 | warning ("\ | |
2206 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
2207 | /* And don't try to use them on the next "run" command. */ | |
2208 | execute_command ("set args", 0); | |
2209 | } | |
33742334 ILT |
2210 | |
2211 | if (execfile == 0 || exec_bfd == 0) | |
aa56c716 | 2212 | error ("No executable file specified"); |
33742334 ILT |
2213 | |
2214 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2215 | ||
2216 | init_wait_for_inferior (); | |
2217 | ||
c2a0f1cb ILT |
2218 | /* FIXME: Should we set inferior_pid here? */ |
2219 | ||
cd10c7e3 | 2220 | /* start-sanitize-gm */ |
188c635f | 2221 | #ifdef GENERAL_MAGIC |
cd10c7e3 SG |
2222 | magic_create_inferior_hook (); |
2223 | proceed (entry_pt, TARGET_SIGNAL_PWR, 0); | |
2224 | #else | |
2225 | /* end-sanitize-gm */ | |
45dc9be3 | 2226 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
cd10c7e3 | 2227 | /* start-sanitize-gm */ |
188c635f | 2228 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 2229 | /* end-sanitize-gm */ |
33742334 ILT |
2230 | } |
2231 | ||
2232 | /* Clean up after a process. Actually nothing to do. */ | |
2233 | ||
2234 | static void | |
2235 | mips_mourn_inferior () | |
2236 | { | |
090d784a JSC |
2237 | if (current_ops != NULL) |
2238 | unpush_target (current_ops); | |
33742334 ILT |
2239 | generic_mourn_inferior (); |
2240 | } | |
d6ca85a8 | 2241 | \f |
aa56c716 JK |
2242 | /* We can write a breakpoint and read the shadow contents in one |
2243 | operation. */ | |
2244 | ||
2245 | /* The IDT board uses an unusual breakpoint value, and sometimes gets | |
2246 | confused when it sees the usual MIPS breakpoint instruction. */ | |
2247 | ||
1a406ce8 ILT |
2248 | #define BREAK_INSN (0x00000a0d) |
2249 | #define BREAK_INSN_SIZE (4) | |
aa56c716 JK |
2250 | |
2251 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
2252 | support. We read the contents of the target location and stash it, | |
2253 | then overwrite it with a breakpoint instruction. ADDR is the target | |
2254 | location in the target machine. CONTENTS_CACHE is a pointer to | |
2255 | memory allocated for saving the target contents. It is guaranteed | |
2256 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
2257 | is accomplished via BREAKPOINT_MAX). */ | |
2258 | ||
2259 | static int | |
2260 | mips_insert_breakpoint (addr, contents_cache) | |
2261 | CORE_ADDR addr; | |
2262 | char *contents_cache; | |
2263 | { | |
cd10c7e3 SG |
2264 | if (monitor_supports_breakpoints) |
2265 | return common_breakpoint ('B', addr, 0x3, "f"); | |
2266 | ||
1a406ce8 | 2267 | return mips_store_word (addr, BREAK_INSN, contents_cache); |
aa56c716 JK |
2268 | } |
2269 | ||
2270 | static int | |
2271 | mips_remove_breakpoint (addr, contents_cache) | |
2272 | CORE_ADDR addr; | |
2273 | char *contents_cache; | |
2274 | { | |
cd10c7e3 SG |
2275 | if (monitor_supports_breakpoints) |
2276 | return common_breakpoint ('b', addr, 0, NULL); | |
2277 | ||
1a406ce8 | 2278 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); |
aa56c716 | 2279 | } |
4704fd9c | 2280 | |
090d784a JSC |
2281 | #if 0 /* currently not used */ |
2282 | /* PMON does not currently provide support for the debug mode 'b' | |
2283 | commands to manipulate breakpoints. However, if we wanted to use | |
2284 | the monitor breakpoints (rather than the GDB BREAK_INSN version) | |
2285 | then this code performs the work needed to leave debug mode, | |
2286 | set/clear the breakpoint, and then return to debug mode. */ | |
2287 | ||
2288 | #define PMON_MAX_BP (33) /* 32 SW, 1 HW */ | |
2289 | static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP]; | |
2290 | /* NOTE: The code relies on this vector being zero-initialised by the system */ | |
2291 | ||
2292 | static int | |
2293 | pmon_insert_breakpoint (addr, contents_cache) | |
2294 | CORE_ADDR addr; | |
2295 | char *contents_cache; | |
2296 | { | |
2297 | int status; | |
2298 | ||
2299 | if (monitor_supports_breakpoints) | |
2300 | { | |
2301 | char tbuff[12]; /* space for breakpoint command */ | |
2302 | int bpnum; | |
2303 | CORE_ADDR bpaddr; | |
2304 | ||
2305 | /* PMON does not support debug level breakpoint set/remove: */ | |
2306 | if (mips_exit_debug ()) | |
2307 | mips_error ("Failed to exit debug mode"); | |
2308 | ||
ee455463 | 2309 | sprintf (tbuff, "b %08x\r", addr); |
090d784a JSC |
2310 | mips_send_command (tbuff, 0); |
2311 | ||
2312 | mips_expect ("Bpt "); | |
2313 | ||
2314 | if (!mips_getstring (tbuff, 2)) | |
2315 | return 1; | |
2316 | tbuff[2] = '\0'; /* terminate the string */ | |
2317 | if (sscanf (tbuff, "%d", &bpnum) != 1) | |
2318 | { | |
2319 | fprintf_unfiltered (stderr, "Invalid decimal breakpoint number from target: %s\n", tbuff); | |
2320 | return 1; | |
2321 | } | |
2322 | ||
2323 | mips_expect (" = "); | |
2324 | ||
2325 | /* Lead in the hex number we are expecting: */ | |
2326 | tbuff[0] = '0'; | |
2327 | tbuff[1] = 'x'; | |
2328 | ||
28444bf3 DP |
2329 | /* FIXME!! only 8 bytes! need to expand for Bfd64; |
2330 | which targets return 64-bit addresses? PMON returns only 32! */ | |
090d784a JSC |
2331 | if (!mips_getstring (&tbuff[2], 8)) |
2332 | return 1; | |
2333 | tbuff[10] = '\0'; /* terminate the string */ | |
2334 | ||
2335 | if (sscanf (tbuff, "0x%08x", &bpaddr) != 1) | |
2336 | { | |
2337 | fprintf_unfiltered (stderr, "Invalid hex address from target: %s\n", tbuff); | |
2338 | return 1; | |
2339 | } | |
2340 | ||
2341 | if (bpnum >= PMON_MAX_BP) | |
2342 | { | |
2343 | fprintf_unfiltered (stderr, "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n", | |
2344 | bpnum, PMON_MAX_BP - 1); | |
2345 | return 1; | |
2346 | } | |
2347 | ||
2348 | if (bpaddr != addr) | |
2349 | fprintf_unfiltered (stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr); | |
2350 | ||
2351 | mips_pmon_bp_info[bpnum] = bpaddr; | |
2352 | ||
ee455463 | 2353 | mips_expect ("\r\n"); |
090d784a JSC |
2354 | mips_expect (mips_monitor_prompt); |
2355 | ||
2356 | mips_enter_debug (); | |
2357 | ||
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | return mips_store_word (addr, BREAK_INSN, contents_cache); | |
2362 | } | |
2363 | ||
2364 | static int | |
2365 | pmon_remove_breakpoint (addr, contents_cache) | |
2366 | CORE_ADDR addr; | |
2367 | char *contents_cache; | |
2368 | { | |
2369 | if (monitor_supports_breakpoints) | |
2370 | { | |
2371 | int bpnum; | |
2372 | char tbuff[7]; /* enough for delete breakpoint command */ | |
2373 | ||
2374 | for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++) | |
2375 | if (mips_pmon_bp_info[bpnum] == addr) | |
2376 | break; | |
2377 | ||
2378 | if (bpnum >= PMON_MAX_BP) | |
2379 | { | |
96431497 MA |
2380 | fprintf_unfiltered (stderr, |
2381 | "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n", | |
2382 | paddr_nz (addr)); | |
090d784a JSC |
2383 | return 1; |
2384 | } | |
2385 | ||
2386 | if (mips_exit_debug ()) | |
2387 | mips_error ("Failed to exit debug mode"); | |
2388 | ||
ee455463 | 2389 | sprintf (tbuff, "db %02d\r", bpnum); |
090d784a JSC |
2390 | |
2391 | mips_send_command (tbuff, -1); | |
2392 | /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not | |
2393 | set" message will be returned. */ | |
2394 | ||
2395 | mips_enter_debug (); | |
2396 | ||
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); | |
2401 | } | |
2402 | #endif | |
2403 | ||
cd10c7e3 SG |
2404 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. |
2405 | This is used for memory ref breakpoints. */ | |
2406 | ||
2407 | static unsigned long | |
2408 | calculate_mask (addr, len) | |
2409 | CORE_ADDR addr; | |
2410 | int len; | |
2411 | { | |
2412 | unsigned long mask; | |
2413 | int i; | |
2414 | ||
2415 | mask = addr ^ (addr + len - 1); | |
2416 | ||
2417 | for (i = 32; i >= 0; i--) | |
2418 | if (mask == 0) | |
2419 | break; | |
2420 | else | |
2421 | mask >>= 1; | |
2422 | ||
2423 | mask = (unsigned long) 0xffffffff >> i; | |
2424 | ||
2425 | return mask; | |
2426 | } | |
2427 | ||
2428 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is either 1 | |
2429 | for a read watchpoint, or 2 for a read/write watchpoint. */ | |
2430 | ||
2431 | int | |
2432 | remote_mips_set_watchpoint (addr, len, type) | |
2433 | CORE_ADDR addr; | |
2434 | int len; | |
2435 | int type; | |
2436 | { | |
2437 | CORE_ADDR first_addr; | |
2438 | unsigned long mask; | |
2439 | char *flags; | |
2440 | ||
2441 | mask = calculate_mask (addr, len); | |
2442 | ||
2443 | first_addr = addr & ~mask; | |
2444 | ||
2445 | switch (type) | |
2446 | { | |
2447 | case 0: /* write */ | |
2448 | flags = "w"; | |
2449 | break; | |
2450 | case 1: /* read */ | |
2451 | flags = "r"; | |
2452 | break; | |
2453 | case 2: /* read/write */ | |
2454 | flags = "rw"; | |
2455 | break; | |
2456 | default: | |
2457 | abort (); | |
2458 | } | |
2459 | ||
2460 | if (common_breakpoint ('B', first_addr, mask, flags)) | |
2461 | return -1; | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | ||
2466 | int | |
2467 | remote_mips_remove_watchpoint (addr, len, type) | |
2468 | CORE_ADDR addr; | |
2469 | int len; | |
2470 | int type; | |
2471 | { | |
2472 | CORE_ADDR first_addr; | |
2473 | unsigned long mask; | |
2474 | ||
2475 | mask = calculate_mask (addr, len); | |
2476 | ||
2477 | first_addr = addr & ~mask; | |
2478 | ||
2479 | if (common_breakpoint ('b', first_addr, 0, NULL)) | |
2480 | return -1; | |
2481 | ||
2482 | return 0; | |
2483 | } | |
2484 | ||
2485 | int | |
2486 | remote_mips_stopped_by_watchpoint () | |
2487 | { | |
2488 | return hit_watchpoint; | |
2489 | } | |
2490 | ||
2491 | /* This routine generates the a breakpoint command of the form: | |
2492 | ||
2493 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> | |
2494 | ||
2495 | Where <CMD> is one of: `B' to set, or `b' to clear a breakpoint. <ADDR> is | |
2496 | the address of the breakpoint. <MASK> is a don't care mask for addresses. | |
7061bb0e MA |
2497 | <FLAGS> is any combination of `r', `w', or `f' for read/write/or fetch. |
2498 | ||
2499 | Return 0 if successful; otherwise 1. */ | |
cd10c7e3 SG |
2500 | |
2501 | static int | |
2502 | common_breakpoint (cmd, addr, mask, flags) | |
2503 | int cmd; | |
2504 | CORE_ADDR addr; | |
2505 | CORE_ADDR mask; | |
2506 | char *flags; | |
2507 | { | |
2508 | int len; | |
2509 | char buf[DATA_MAXLEN + 1]; | |
2510 | char rcmd; | |
2511 | int rpid, rerrflg, rresponse; | |
2512 | int nfields; | |
2513 | ||
32dab603 | 2514 | addr = ADDR_BITS_REMOVE (addr); |
cd10c7e3 | 2515 | if (flags) |
96431497 MA |
2516 | sprintf (buf, "0x0 %c 0x%s 0x%s %s", cmd, paddr_nz (addr), paddr_nz (mask), |
2517 | flags); | |
cd10c7e3 | 2518 | else |
96431497 | 2519 | sprintf (buf, "0x0 %c 0x%s", cmd, paddr_nz (addr)); |
cd10c7e3 SG |
2520 | |
2521 | mips_send_packet (buf, 1); | |
2522 | ||
2523 | len = mips_receive_packet (buf, 1, mips_receive_wait); | |
4f005fea | 2524 | buf[len] = '\0'; |
cd10c7e3 SG |
2525 | |
2526 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", &rpid, &rcmd, &rerrflg, &rresponse); | |
2527 | ||
2528 | if (nfields != 4 | |
2529 | || rcmd != cmd) | |
2530 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2531 | ||
2532 | if (rerrflg != 0) | |
2533 | { | |
5dad8312 | 2534 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas |
51328506 | 2535 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ |
5dad8312 | 2536 | if (mips_monitor == MON_DDB) |
51328506 | 2537 | rresponse = rerrflg; |
3308a107 | 2538 | if (rresponse != 22) /* invalid argument */ |
28444bf3 | 2539 | fprintf_unfiltered (stderr, "common_breakpoint (0x%s): Got error: 0x%x\n", |
96431497 | 2540 | paddr_nz (addr), rresponse); |
cd10c7e3 SG |
2541 | return 1; |
2542 | } | |
2543 | ||
2544 | return 0; | |
2545 | } | |
d6ca85a8 | 2546 | \f |
4704fd9c SG |
2547 | static void |
2548 | send_srec (srec, len, addr) | |
2549 | char *srec; | |
2550 | int len; | |
2551 | CORE_ADDR addr; | |
2552 | { | |
2553 | while (1) | |
2554 | { | |
2555 | int ch; | |
2556 | ||
2557 | SERIAL_WRITE (mips_desc, srec, len); | |
2558 | ||
2559 | ch = mips_readchar (2); | |
2560 | ||
2561 | switch (ch) | |
2562 | { | |
2563 | case SERIAL_TIMEOUT: | |
2564 | error ("Timeout during download."); | |
2565 | break; | |
2566 | case 0x6: /* ACK */ | |
2567 | return; | |
2568 | case 0x15: /* NACK */ | |
2569 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr); | |
2570 | continue; | |
2571 | default: | |
2572 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2573 | } | |
2574 | } | |
2575 | } | |
2576 | ||
2577 | /* Download a binary file by converting it to S records. */ | |
2578 | ||
2579 | static void | |
2580 | mips_load_srec (args) | |
2581 | char *args; | |
2582 | { | |
2583 | bfd *abfd; | |
2584 | asection *s; | |
2585 | char *buffer, srec[1024]; | |
ee455463 MA |
2586 | unsigned int i; |
2587 | unsigned int srec_frame = 200; | |
4704fd9c SG |
2588 | int reclen; |
2589 | static int hashmark = 1; | |
2590 | ||
2591 | buffer = alloca (srec_frame * 2 + 256); | |
2592 | ||
2593 | abfd = bfd_openr (args, 0); | |
2594 | if (!abfd) | |
2595 | { | |
2596 | printf_filtered ("Unable to open file %s\n", args); | |
2597 | return; | |
2598 | } | |
2599 | ||
2600 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2601 | { | |
2602 | printf_filtered ("File is not an object file\n"); | |
2603 | return; | |
2604 | } | |
4704fd9c | 2605 | |
090d784a | 2606 | /* This actually causes a download in the IDT binary format: */ |
090d784a | 2607 | mips_send_command (LOAD_CMD, 0); |
4704fd9c SG |
2608 | |
2609 | for (s = abfd->sections; s; s = s->next) | |
2610 | { | |
2611 | if (s->flags & SEC_LOAD) | |
2612 | { | |
ee455463 | 2613 | unsigned int numbytes; |
4704fd9c | 2614 | |
28444bf3 | 2615 | /* FIXME! vma too small?? */ |
4704fd9c SG |
2616 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, |
2617 | s->vma + s->_raw_size); | |
2618 | gdb_flush (gdb_stdout); | |
2619 | ||
2620 | for (i = 0; i < s->_raw_size; i += numbytes) | |
2621 | { | |
2622 | numbytes = min (srec_frame, s->_raw_size - i); | |
2623 | ||
2624 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2625 | ||
2626 | reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes); | |
2627 | send_srec (srec, reclen, s->vma + i); | |
2628 | ||
2629 | if (hashmark) | |
2630 | { | |
2631 | putchar_unfiltered ('#'); | |
2632 | gdb_flush (gdb_stdout); | |
2633 | } | |
2634 | ||
2635 | } /* Per-packet (or S-record) loop */ | |
2636 | ||
2637 | putchar_unfiltered ('\n'); | |
2638 | } /* Loadable sections */ | |
2639 | } | |
2640 | if (hashmark) | |
2641 | putchar_unfiltered ('\n'); | |
2642 | ||
2643 | /* Write a type 7 terminator record. no data for a type 7, and there | |
2644 | is no data, so len is 0. */ | |
2645 | ||
2646 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2647 | ||
2648 | send_srec (srec, reclen, abfd->start_address); | |
2649 | ||
2650 | SERIAL_FLUSH_INPUT (mips_desc); | |
2651 | } | |
2652 | ||
2653 | /* | |
2654 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
2655 | * time, each with it's own header and trailer line. | |
2656 | * An srecord looks like this: | |
2657 | * | |
2658 | * byte count-+ address | |
2659 | * start ---+ | | data +- checksum | |
2660 | * | | | | | |
2661 | * S01000006F6B692D746573742E73726563E4 | |
2662 | * S315000448600000000000000000FC00005900000000E9 | |
2663 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2664 | * S30B0004485A0000000000004E | |
2665 | * S70500040000F6 | |
2666 | * | |
2667 | * S<type><length><address><data><checksum> | |
2668 | * | |
2669 | * Where | |
2670 | * - length | |
2671 | * is the number of bytes following upto the checksum. Note that | |
2672 | * this is not the number of chars following, since it takes two | |
2673 | * chars to represent a byte. | |
2674 | * - type | |
2675 | * is one of: | |
2676 | * 0) header record | |
2677 | * 1) two byte address data record | |
2678 | * 2) three byte address data record | |
2679 | * 3) four byte address data record | |
2680 | * 7) four byte address termination record | |
2681 | * 8) three byte address termination record | |
2682 | * 9) two byte address termination record | |
2683 | * | |
2684 | * - address | |
2685 | * is the start address of the data following, or in the case of | |
2686 | * a termination record, the start address of the image | |
2687 | * - data | |
2688 | * is the data. | |
2689 | * - checksum | |
2690 | * is the sum of all the raw byte data in the record, from the length | |
2691 | * upwards, modulo 256 and subtracted from 255. | |
2692 | * | |
2693 | * This routine returns the length of the S-record. | |
2694 | * | |
2695 | */ | |
2696 | ||
2697 | static int | |
2698 | mips_make_srec (buf, type, memaddr, myaddr, len) | |
2699 | char *buf; | |
cd10c7e3 | 2700 | int type; |
4704fd9c SG |
2701 | CORE_ADDR memaddr; |
2702 | unsigned char *myaddr; | |
2703 | int len; | |
2704 | { | |
2705 | unsigned char checksum; | |
2706 | int i; | |
2707 | ||
2708 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2709 | and 1 is the number of bytes in the count. */ | |
2710 | ||
28444bf3 | 2711 | /* FIXME!! bigger buf required for 64-bit! */ |
4704fd9c SG |
2712 | buf[0] = 'S'; |
2713 | buf[1] = type; | |
2714 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
090d784a JSC |
2715 | /* This assumes S3 style downloads (4byte addresses). There should |
2716 | probably be a check, or the code changed to make it more | |
2717 | explicit. */ | |
4704fd9c SG |
2718 | buf[3] = memaddr >> 24; |
2719 | buf[4] = memaddr >> 16; | |
2720 | buf[5] = memaddr >> 8; | |
2721 | buf[6] = memaddr; | |
2722 | memcpy (&buf[7], myaddr, len); | |
2723 | ||
090d784a JSC |
2724 | /* Note that the checksum is calculated on the raw data, not the |
2725 | hexified data. It includes the length, address and the data | |
2726 | portions of the packet. */ | |
4704fd9c SG |
2727 | checksum = 0; |
2728 | buf += 2; /* Point at length byte */ | |
2729 | for (i = 0; i < len + 4 + 1; i++) | |
2730 | checksum += *buf++; | |
2731 | ||
2732 | *buf = ~checksum; | |
2733 | ||
2734 | return len + 8; | |
2735 | } | |
2736 | ||
090d784a JSC |
2737 | /* The following manifest controls whether we enable the simple flow |
2738 | control support provided by the monitor. If enabled the code will | |
2739 | wait for an affirmative ACK between transmitting packets. */ | |
2740 | #define DOETXACK (1) | |
2741 | ||
2742 | /* The PMON fast-download uses an encoded packet format constructed of | |
2743 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2744 | escape sequences (preceded by a '/'): | |
2745 | ||
2746 | 'K' clear checksum | |
2747 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2748 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2749 | 'Z' zero fill multiple of 3bytes | |
2750 | 'B' byte (12bit encoded value, of 8bit data) | |
2751 | 'A' address (36bit encoded value) | |
2752 | 'E' define entry as original address, and exit load | |
2753 | ||
2754 | The packets are processed in 4 character chunks, so the escape | |
2755 | sequences that do not have any data (or variable length data) | |
2756 | should be padded to a 4 character boundary. The decoder will give | |
2757 | an error if the complete message block size is not a multiple of | |
2758 | 4bytes (size of record). | |
2759 | ||
2760 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2761 | used to index into this string to get the specific character | |
2762 | encoding for the value: */ | |
102f473b | 2763 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; |
090d784a JSC |
2764 | |
2765 | /* Convert the number of bits required into an encoded number, 6bits | |
2766 | at a time (range 0..63). Keep a checksum if required (passed | |
2767 | pointer non-NULL). The function returns the number of encoded | |
2768 | characters written into the buffer. */ | |
2769 | static int | |
2770 | pmon_makeb64 (v, p, n, chksum) | |
2771 | unsigned long v; | |
2772 | char *p; | |
2773 | int n; | |
2774 | int *chksum; | |
2775 | { | |
2776 | int count = (n / 6); | |
2777 | ||
2778 | if ((n % 12) != 0) { | |
2779 | fprintf_unfiltered(stderr,"Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n,(n == 1)?"":"s"); | |
2780 | return(0); | |
2781 | } | |
2782 | if (n > 36) { | |
2783 | fprintf_unfiltered(stderr,"Fast encoding cannot process more than 36bits at the moment: %dbits\n",n); | |
2784 | return(0); | |
2785 | } | |
2786 | ||
2787 | /* Deal with the checksum: */ | |
2788 | if (chksum != NULL) { | |
2789 | switch (n) { | |
2790 | case 36: *chksum += ((v >> 24) & 0xFFF); | |
2791 | case 24: *chksum += ((v >> 12) & 0xFFF); | |
2792 | case 12: *chksum += ((v >> 0) & 0xFFF); | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | do { | |
2797 | n -= 6; | |
2798 | *p++ = encoding[(v >> n) & 0x3F]; | |
2799 | } while (n > 0); | |
2800 | ||
2801 | return(count); | |
2802 | } | |
2803 | ||
2804 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
2805 | escape sequence into the data stream. */ | |
2806 | static int | |
2807 | pmon_zeroset (recsize, buff, amount, chksum) | |
2808 | int recsize; | |
2809 | char **buff; | |
2810 | int *amount; | |
2811 | unsigned int *chksum; | |
2812 | { | |
2813 | int count; | |
2814 | ||
2815 | sprintf(*buff,"/Z"); | |
2816 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); | |
2817 | *buff += (count + 2); | |
2818 | *amount = 0; | |
2819 | return(recsize + count + 2); | |
2820 | } | |
2821 | ||
2822 | static int | |
2823 | pmon_checkset (recsize, buff, value) | |
2824 | int recsize; | |
2825 | char **buff; | |
2826 | int *value; | |
2827 | { | |
2828 | int count; | |
2829 | ||
2830 | /* Add the checksum (without updating the value): */ | |
2831 | sprintf (*buff, "/C"); | |
2832 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
2833 | *buff += (count + 2); | |
ee455463 | 2834 | sprintf (*buff, "\n"); |
090d784a JSC |
2835 | *buff += 2; /* include zero terminator */ |
2836 | /* Forcing a checksum validation clears the sum: */ | |
2837 | *value = 0; | |
2838 | return(recsize + count + 3); | |
2839 | } | |
2840 | ||
2841 | /* Amount of padding we leave after at the end of the output buffer, | |
2842 | for the checksum and line termination characters: */ | |
2843 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
2844 | /* zero-fill, checksum, transfer end and line termination space. */ | |
2845 | ||
2846 | /* The amount of binary data loaded from the object file in a single | |
2847 | operation: */ | |
2848 | #define BINCHUNK (1024) | |
2849 | ||
2850 | /* Maximum line of data accepted by the monitor: */ | |
2851 | #define MAXRECSIZE (550) | |
2852 | /* NOTE: This constant depends on the monitor being used. This value | |
2853 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
2854 | ||
2855 | static void | |
2856 | pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill) | |
2857 | char **outbuf; | |
2858 | unsigned char *inbuf; | |
2859 | int *inptr; | |
2860 | int inamount; | |
2861 | int *recsize; | |
2862 | unsigned int *csum; | |
2863 | unsigned int *zerofill; | |
2864 | { | |
2865 | int count = 0; | |
2866 | char *p = *outbuf; | |
2867 | ||
2868 | /* This is a simple check to ensure that our data will fit within | |
2869 | the maximum allowable record size. Each record output is 4bytes | |
2870 | in length. We must allow space for a pending zero fill command, | |
2871 | the record, and a checksum record. */ | |
2872 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) { | |
2873 | /* Process the binary data: */ | |
2874 | if ((inamount - *inptr) < 3) { | |
2875 | if (*zerofill != 0) | |
2876 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2877 | sprintf (p, "/B"); | |
2878 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
2879 | p += (2 + count); | |
2880 | *recsize += (2 + count); | |
2881 | (*inptr)++; | |
2882 | } else { | |
2883 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
2884 | /* Simple check for zero data. TODO: A better check would be | |
2885 | to check the last, and then the middle byte for being zero | |
2886 | (if the first byte is not). We could then check for | |
2887 | following runs of zeros, and if above a certain size it is | |
2888 | worth the 4 or 8 character hit of the byte insertions used | |
2889 | to pad to the start of the zeroes. NOTE: This also depends | |
2890 | on the alignment at the end of the zero run. */ | |
2891 | if (value == 0x00000000) { | |
2892 | (*zerofill)++; | |
2893 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
2894 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2895 | }else { | |
2896 | if (*zerofill != 0) | |
2897 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2898 | count = pmon_makeb64 (value, p, 24, csum); | |
2899 | p += count; | |
2900 | *recsize += count; | |
2901 | } | |
2902 | *inptr += 3; | |
2903 | } | |
2904 | } | |
2905 | ||
2906 | *outbuf = p; | |
2907 | return; | |
2908 | } | |
2909 | ||
090d784a | 2910 | static int |
ee455463 MA |
2911 | pmon_check_ack(mesg) |
2912 | char *mesg; | |
090d784a | 2913 | { |
ee455463 MA |
2914 | #if defined(DOETXACK) |
2915 | int c; | |
2916 | ||
2917 | if (!tftp_in_use) | |
2918 | { | |
2919 | c = SERIAL_READCHAR (udp_in_use ? udp_desc : mips_desc, 2); | |
2920 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) | |
2921 | { | |
2922 | fprintf_unfiltered (gdb_stderr, | |
2923 | "Failed to receive valid ACK for %s\n", mesg); | |
2924 | return(-1); /* terminate the download */ | |
2925 | } | |
2926 | } | |
2927 | #endif /* DOETXACK */ | |
090d784a JSC |
2928 | return(0); |
2929 | } | |
ee455463 MA |
2930 | |
2931 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
2932 | which is either a serial port or a UDP socket. */ | |
2933 | ||
2934 | static void | |
2935 | pmon_start_download () | |
2936 | { | |
2937 | if (tftp_in_use) | |
2938 | { | |
2939 | /* Create the temporary download file. */ | |
2940 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
2941 | perror_with_name (tftp_localname); | |
2942 | } | |
2943 | else | |
2944 | { | |
2945 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
2946 | mips_expect ("Downloading from "); | |
2947 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
2948 | mips_expect (", ^C to abort\r\n"); | |
2949 | } | |
2950 | } | |
2951 | ||
96431497 MA |
2952 | static int |
2953 | mips_expect_download (char *string) | |
2954 | { | |
2955 | if (!mips_expect (string)) | |
2956 | { | |
2957 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
2958 | if (tftp_in_use) | |
2959 | remove (tftp_localname); /* Remove temporary file */ | |
2960 | return 0; | |
2961 | } | |
2962 | else | |
2963 | return 1; | |
2964 | } | |
2965 | ||
ee455463 MA |
2966 | static void |
2967 | pmon_end_download (final, bintotal) | |
2968 | int final; | |
2969 | int bintotal; | |
2970 | { | |
2971 | char hexnumber[9]; /* includes '\0' space */ | |
2972 | ||
2973 | if (tftp_in_use) | |
2974 | { | |
2975 | static char *load_cmd_prefix = "load -b -s "; | |
2976 | char *cmd; | |
2977 | struct stat stbuf; | |
2978 | ||
2979 | /* Close off the temporary file containing the load data. */ | |
2980 | fclose (tftp_file); | |
2981 | tftp_file = NULL; | |
2982 | ||
2983 | /* Make the temporary file readable by the world. */ | |
2984 | if (stat (tftp_localname, &stbuf) == 0) | |
2985 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
2986 | ||
2987 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
2988 | mips_send_command ("initEther\r", -1); | |
2989 | ||
2990 | /* Send the load command. */ | |
2991 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
2992 | strcpy (cmd, load_cmd_prefix); | |
2993 | strcat (cmd, tftp_name); | |
2994 | strcat (cmd, "\r"); | |
2995 | mips_send_command (cmd, 0); | |
2996 | free (cmd); | |
96431497 MA |
2997 | if (!mips_expect_download ("Downloading from ")) |
2998 | return; | |
2999 | if (!mips_expect_download (tftp_name)) | |
3000 | return; | |
3001 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3002 | return; | |
ee455463 MA |
3003 | } |
3004 | ||
3005 | /* Wait for the stuff that PMON prints after the load has completed. | |
3006 | The timeout value for use in the tftp case (15 seconds) was picked | |
3007 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
7061bb0e MA |
3008 | if (mips_monitor == MON_LSI) |
3009 | { | |
3010 | pmon_check_ack ("termination"); | |
3011 | mips_expect_timeout ("Entry address is ", tftp_in_use ? 15 : 2); | |
3012 | } | |
3013 | else | |
3014 | mips_expect_timeout ("Entry Address = ", tftp_in_use ? 15 : 2); | |
3015 | ||
ee455463 MA |
3016 | sprintf (hexnumber,"%x",final); |
3017 | mips_expect (hexnumber); | |
3018 | mips_expect ("\r\n"); | |
7061bb0e MA |
3019 | if (mips_monitor != MON_LSI) |
3020 | pmon_check_ack ("termination"); | |
ee455463 MA |
3021 | mips_expect ("\r\ntotal = 0x"); |
3022 | sprintf (hexnumber,"%x",bintotal); | |
3023 | mips_expect (hexnumber); | |
96431497 MA |
3024 | if (!mips_expect_download (" bytes\r\n")) |
3025 | return; | |
ee455463 MA |
3026 | |
3027 | if (tftp_in_use) | |
3028 | remove (tftp_localname); /* Remove temporary file */ | |
3029 | } | |
3030 | ||
3031 | static void | |
3032 | pmon_download (buffer, length) | |
3033 | char *buffer; | |
3034 | int length; | |
3035 | { | |
3036 | if (tftp_in_use) | |
3037 | fwrite (buffer, 1, length, tftp_file); | |
3038 | else | |
3039 | SERIAL_WRITE (udp_in_use ? udp_desc : mips_desc, buffer, length); | |
3040 | } | |
090d784a JSC |
3041 | |
3042 | static void | |
3043 | pmon_load_fast (file) | |
3044 | char *file; | |
3045 | { | |
3046 | bfd *abfd; | |
3047 | asection *s; | |
3048 | unsigned char *binbuf; | |
3049 | char *buffer; | |
3050 | int reclen; | |
3051 | unsigned int csum = 0; | |
ee455463 | 3052 | int hashmark = !tftp_in_use; |
090d784a | 3053 | int bintotal = 0; |
ee455463 | 3054 | int final = 0; |
090d784a JSC |
3055 | int finished = 0; |
3056 | ||
c37c7c6c FF |
3057 | buffer = (char *)xmalloc(MAXRECSIZE + 1); |
3058 | binbuf = (unsigned char *)xmalloc(BINCHUNK); | |
090d784a JSC |
3059 | |
3060 | abfd = bfd_openr(file,0); | |
3061 | if (!abfd) | |
3062 | { | |
3063 | printf_filtered ("Unable to open file %s\n",file); | |
3064 | return; | |
3065 | } | |
3066 | ||
3067 | if (bfd_check_format(abfd,bfd_object) == 0) | |
3068 | { | |
3069 | printf_filtered("File is not an object file\n"); | |
3070 | return; | |
3071 | } | |
3072 | ||
3073 | /* Setup the required download state: */ | |
ee455463 MA |
3074 | mips_send_command ("set dlproto etxack\r", -1); |
3075 | mips_send_command ("set dlecho off\r", -1); | |
090d784a JSC |
3076 | /* NOTE: We get a "cannot set variable" message if the variable is |
3077 | already defined to have the argument we give. The code doesn't | |
3078 | care, since it just scans to the next prompt anyway. */ | |
3079 | /* Start the download: */ | |
ee455463 | 3080 | pmon_start_download(); |
090d784a JSC |
3081 | |
3082 | /* Zero the checksum */ | |
ee455463 | 3083 | sprintf(buffer,"/Kxx\n"); |
090d784a | 3084 | reclen = strlen(buffer); |
ee455463 MA |
3085 | pmon_download (buffer, reclen); |
3086 | finished = pmon_check_ack("/Kxx"); | |
090d784a JSC |
3087 | |
3088 | for (s = abfd->sections; s && !finished; s = s->next) | |
3089 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ | |
3090 | { | |
3091 | bintotal += s->_raw_size; | |
3092 | final = (s->vma + s->_raw_size); | |
3093 | ||
51328506 JSC |
3094 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int)s->vma, |
3095 | (unsigned int)(s->vma + s->_raw_size)); | |
090d784a JSC |
3096 | gdb_flush (gdb_stdout); |
3097 | ||
3098 | /* Output the starting address */ | |
3099 | sprintf(buffer,"/A"); | |
3100 | reclen = pmon_makeb64(s->vma,&buffer[2],36,&csum); | |
ee455463 | 3101 | buffer[2 + reclen] = '\n'; |
090d784a JSC |
3102 | buffer[3 + reclen] = '\0'; |
3103 | reclen += 3; /* for the initial escape code and carriage return */ | |
ee455463 MA |
3104 | pmon_download (buffer, reclen); |
3105 | finished = pmon_check_ack("/A"); | |
090d784a JSC |
3106 | |
3107 | if (!finished) | |
3108 | { | |
ee455463 | 3109 | unsigned int binamount; |
090d784a JSC |
3110 | unsigned int zerofill = 0; |
3111 | char *bp = buffer; | |
ee455463 | 3112 | unsigned int i; |
090d784a JSC |
3113 | |
3114 | reclen = 0; | |
3115 | ||
3116 | for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) { | |
3117 | int binptr = 0; | |
3118 | ||
3119 | binamount = min (BINCHUNK, s->_raw_size - i); | |
3120 | ||
3121 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3122 | ||
3123 | /* This keeps a rolling checksum, until we decide to output | |
3124 | the line: */ | |
3125 | for (; ((binamount - binptr) > 0);) { | |
3126 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill); | |
3127 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) { | |
3128 | reclen = pmon_checkset (reclen, &bp, &csum); | |
ee455463 MA |
3129 | pmon_download (buffer, reclen); |
3130 | finished = pmon_check_ack("data record"); | |
090d784a JSC |
3131 | if (finished) { |
3132 | zerofill = 0; /* do not transmit pending zerofills */ | |
3133 | break; | |
3134 | } | |
090d784a JSC |
3135 | |
3136 | if (hashmark) { | |
3137 | putchar_unfiltered ('#'); | |
3138 | gdb_flush (gdb_stdout); | |
3139 | } | |
3140 | ||
3141 | bp = buffer; | |
3142 | reclen = 0; /* buffer processed */ | |
3143 | } | |
3144 | } | |
3145 | } | |
3146 | ||
3147 | /* Ensure no out-standing zerofill requests: */ | |
3148 | if (zerofill != 0) | |
3149 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3150 | ||
3151 | /* and then flush the line: */ | |
3152 | if (reclen > 0) { | |
3153 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3154 | /* Currently pmon_checkset outputs the line terminator by | |
3155 | default, so we write out the buffer so far: */ | |
ee455463 MA |
3156 | pmon_download (buffer, reclen); |
3157 | finished = pmon_check_ack("record remnant"); | |
090d784a JSC |
3158 | } |
3159 | } | |
3160 | ||
ee455463 | 3161 | putchar_unfiltered ('\n'); |
090d784a JSC |
3162 | } |
3163 | ||
3164 | /* Terminate the transfer. We know that we have an empty output | |
3165 | buffer at this point. */ | |
ee455463 | 3166 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
090d784a | 3167 | reclen = strlen (buffer); |
ee455463 | 3168 | pmon_download (buffer, reclen); |
090d784a JSC |
3169 | |
3170 | if (finished) { /* Ignore the termination message: */ | |
ee455463 | 3171 | SERIAL_FLUSH_INPUT (udp_in_use ? udp_desc : mips_desc); |
090d784a | 3172 | } else { /* Deal with termination message: */ |
ee455463 | 3173 | pmon_end_download (final, bintotal); |
090d784a JSC |
3174 | } |
3175 | ||
3176 | return; | |
3177 | } | |
3178 | ||
4704fd9c SG |
3179 | /* mips_load -- download a file. */ |
3180 | ||
3181 | static void | |
3182 | mips_load (file, from_tty) | |
3183 | char *file; | |
3184 | int from_tty; | |
3185 | { | |
4704fd9c | 3186 | /* Get the board out of remote debugging mode. */ |
090d784a | 3187 | if (mips_exit_debug ()) |
4704fd9c SG |
3188 | error ("mips_load: Couldn't get into monitor mode."); |
3189 | ||
7061bb0e | 3190 | if (mips_monitor != MON_IDT) |
090d784a JSC |
3191 | pmon_load_fast (file); |
3192 | else | |
3193 | mips_load_srec (file); | |
4704fd9c | 3194 | |
4704fd9c SG |
3195 | mips_initialize (); |
3196 | ||
aeb8f981 | 3197 | /* Finally, make the PC point at the start address */ |
5dad8312 | 3198 | if (mips_monitor == MON_DDB) |
aeb8f981 | 3199 | { |
5dad8312 | 3200 | /* Work around problem where DDB monitor does not update the |
aeb8f981 JSC |
3201 | PC after a load. The following ensures that the write_pc() |
3202 | WILL update the PC value: */ | |
3203 | register_valid[PC_REGNUM] = 0; | |
3204 | } | |
4704fd9c SG |
3205 | if (exec_bfd) |
3206 | write_pc (bfd_get_start_address (exec_bfd)); | |
3207 | ||
3208 | inferior_pid = 0; /* No process now */ | |
3209 | ||
3210 | /* This is necessary because many things were based on the PC at the time that | |
3211 | we attached to the monitor, which is no longer valid now that we have loaded | |
3212 | new code (and just changed the PC). Another way to do this might be to call | |
3213 | normal_stop, except that the stack may not be valid, and things would get | |
3214 | horribly confused... */ | |
3215 | ||
3216 | clear_symtab_users (); | |
3217 | } | |
d6ca85a8 | 3218 | \f |
33742334 ILT |
3219 | /* The target vector. */ |
3220 | ||
3221 | struct target_ops mips_ops = | |
3222 | { | |
3223 | "mips", /* to_shortname */ | |
3224 | "Remote MIPS debugging over serial line", /* to_longname */ | |
796d1fd3 JK |
3225 | "\ |
3226 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3227 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3228 | HOST:PORT to access a board over a network", /* to_doc */ | |
33742334 ILT |
3229 | mips_open, /* to_open */ |
3230 | mips_close, /* to_close */ | |
3231 | NULL, /* to_attach */ | |
3232 | mips_detach, /* to_detach */ | |
3233 | mips_resume, /* to_resume */ | |
3234 | mips_wait, /* to_wait */ | |
3235 | mips_fetch_registers, /* to_fetch_registers */ | |
3236 | mips_store_registers, /* to_store_registers */ | |
3237 | mips_prepare_to_store, /* to_prepare_to_store */ | |
3238 | mips_xfer_memory, /* to_xfer_memory */ | |
3239 | mips_files_info, /* to_files_info */ | |
aa56c716 JK |
3240 | mips_insert_breakpoint, /* to_insert_breakpoint */ |
3241 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
33742334 ILT |
3242 | NULL, /* to_terminal_init */ |
3243 | NULL, /* to_terminal_inferior */ | |
3244 | NULL, /* to_terminal_ours_for_output */ | |
3245 | NULL, /* to_terminal_ours */ | |
3246 | NULL, /* to_terminal_info */ | |
c2a0f1cb | 3247 | mips_kill, /* to_kill */ |
4704fd9c | 3248 | mips_load, /* to_load */ |
33742334 ILT |
3249 | NULL, /* to_lookup_symbol */ |
3250 | mips_create_inferior, /* to_create_inferior */ | |
3251 | mips_mourn_inferior, /* to_mourn_inferior */ | |
3252 | NULL, /* to_can_run */ | |
3253 | NULL, /* to_notice_signals */ | |
43fc25c8 | 3254 | 0, /* to_thread_alive */ |
78b459a7 | 3255 | 0, /* to_stop */ |
33742334 ILT |
3256 | process_stratum, /* to_stratum */ |
3257 | NULL, /* to_next */ | |
3258 | 1, /* to_has_all_memory */ | |
3259 | 1, /* to_has_memory */ | |
3260 | 1, /* to_has_stack */ | |
3261 | 1, /* to_has_registers */ | |
3262 | 1, /* to_has_execution */ | |
3263 | NULL, /* sections */ | |
3264 | NULL, /* sections_end */ | |
3265 | OPS_MAGIC /* to_magic */ | |
3266 | }; | |
d6ca85a8 | 3267 | \f |
090d784a JSC |
3268 | /* An alternative target vector: */ |
3269 | struct target_ops pmon_ops = | |
3270 | { | |
3271 | "pmon", /* to_shortname */ | |
3272 | "Remote MIPS debugging over serial line", /* to_longname */ | |
3273 | "\ | |
28444bf3 DP |
3274 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3275 | line. The argument is the device it is connected to or, if it contains a\n\ | |
090d784a JSC |
3276 | colon, HOST:PORT to access a board over a network", /* to_doc */ |
3277 | pmon_open, /* to_open */ | |
3278 | mips_close, /* to_close */ | |
3279 | NULL, /* to_attach */ | |
3280 | mips_detach, /* to_detach */ | |
3281 | mips_resume, /* to_resume */ | |
3282 | pmon_wait, /* to_wait */ | |
3283 | mips_fetch_registers, /* to_fetch_registers */ | |
3284 | mips_store_registers, /* to_store_registers */ | |
3285 | mips_prepare_to_store, /* to_prepare_to_store */ | |
3286 | mips_xfer_memory, /* to_xfer_memory */ | |
3287 | mips_files_info, /* to_files_info */ | |
3288 | mips_insert_breakpoint, /* to_insert_breakpoint */ | |
3289 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
3290 | NULL, /* to_terminal_init */ | |
3291 | NULL, /* to_terminal_inferior */ | |
3292 | NULL, /* to_terminal_ours_for_output */ | |
3293 | NULL, /* to_terminal_ours */ | |
3294 | NULL, /* to_terminal_info */ | |
3295 | mips_kill, /* to_kill */ | |
3296 | mips_load, /* to_load */ | |
3297 | NULL, /* to_lookup_symbol */ | |
3298 | mips_create_inferior, /* to_create_inferior */ | |
3299 | mips_mourn_inferior, /* to_mourn_inferior */ | |
3300 | NULL, /* to_can_run */ | |
3301 | NULL, /* to_notice_signals */ | |
3302 | 0, /* to_thread_alive */ | |
3303 | 0, /* to_stop */ | |
3304 | process_stratum, /* to_stratum */ | |
3305 | NULL, /* to_next */ | |
3306 | 1, /* to_has_all_memory */ | |
3307 | 1, /* to_has_memory */ | |
3308 | 1, /* to_has_stack */ | |
3309 | 1, /* to_has_registers */ | |
3310 | 1, /* to_has_execution */ | |
3311 | NULL, /* sections */ | |
3312 | NULL, /* sections_end */ | |
3313 | OPS_MAGIC /* to_magic */ | |
3314 | }; | |
d6ca85a8 | 3315 | \f |
51328506 JSC |
3316 | /* Another alternative target vector. This is a PMON system, but with |
3317 | a different monitor prompt, aswell as some other operational | |
3318 | differences: */ | |
5dad8312 | 3319 | struct target_ops ddb_ops = |
51328506 | 3320 | { |
5dad8312 | 3321 | "ddb", /* to_shortname */ |
51328506 JSC |
3322 | "Remote MIPS debugging over serial line", /* to_longname */ |
3323 | "\ | |
28444bf3 | 3324 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
ee455463 MA |
3325 | line. The first argument is the device it is connected to or, if it contains\n\ |
3326 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3327 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3328 | TFTP downloads to the board. The optional third parameter is the local\n\ | |
3329 | of the TFTP temporary file, if it differs from the filename seen by the board", | |
3330 | /* to_doc */ | |
5dad8312 | 3331 | ddb_open, /* to_open */ |
51328506 JSC |
3332 | mips_close, /* to_close */ |
3333 | NULL, /* to_attach */ | |
3334 | mips_detach, /* to_detach */ | |
3335 | mips_resume, /* to_resume */ | |
3336 | pmon_wait, /* to_wait */ | |
3337 | mips_fetch_registers, /* to_fetch_registers */ | |
3338 | mips_store_registers, /* to_store_registers */ | |
3339 | mips_prepare_to_store, /* to_prepare_to_store */ | |
3340 | mips_xfer_memory, /* to_xfer_memory */ | |
3341 | mips_files_info, /* to_files_info */ | |
3342 | mips_insert_breakpoint, /* to_insert_breakpoint */ | |
3343 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
3344 | NULL, /* to_terminal_init */ | |
3345 | NULL, /* to_terminal_inferior */ | |
3346 | NULL, /* to_terminal_ours_for_output */ | |
3347 | NULL, /* to_terminal_ours */ | |
3348 | NULL, /* to_terminal_info */ | |
3349 | mips_kill, /* to_kill */ | |
3350 | mips_load, /* to_load */ | |
3351 | NULL, /* to_lookup_symbol */ | |
3352 | mips_create_inferior, /* to_create_inferior */ | |
3353 | mips_mourn_inferior, /* to_mourn_inferior */ | |
3354 | NULL, /* to_can_run */ | |
3355 | NULL, /* to_notice_signals */ | |
3356 | 0, /* to_thread_alive */ | |
3357 | 0, /* to_stop */ | |
3358 | process_stratum, /* to_stratum */ | |
3359 | NULL, /* to_next */ | |
3360 | 1, /* to_has_all_memory */ | |
3361 | 1, /* to_has_memory */ | |
3362 | 1, /* to_has_stack */ | |
3363 | 1, /* to_has_registers */ | |
3364 | 1, /* to_has_execution */ | |
3365 | NULL, /* sections */ | |
3366 | NULL, /* sections_end */ | |
3367 | OPS_MAGIC /* to_magic */ | |
3368 | }; | |
d6ca85a8 | 3369 | \f |
7061bb0e MA |
3370 | /* Another alternative target vector for LSI Logic MiniRISC boards. |
3371 | This is a PMON system, but with some other operational differences. */ | |
3372 | struct target_ops lsi_ops = | |
3373 | { | |
3374 | "lsi", /* to_shortname */ | |
3375 | "Remote MIPS debugging over serial line", /* to_longname */ | |
3376 | "\ | |
3377 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3378 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3379 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3380 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3381 | TFTP downloads to the board. The optional third parameter is the local\n\ | |
3382 | of the TFTP temporary file, if it differs from the filename seen by the board", | |
3383 | /* to_doc */ | |
3384 | lsi_open, /* to_open */ | |
3385 | mips_close, /* to_close */ | |
3386 | NULL, /* to_attach */ | |
3387 | mips_detach, /* to_detach */ | |
3388 | mips_resume, /* to_resume */ | |
3389 | pmon_wait, /* to_wait */ | |
3390 | mips_fetch_registers, /* to_fetch_registers */ | |
3391 | mips_store_registers, /* to_store_registers */ | |
3392 | mips_prepare_to_store, /* to_prepare_to_store */ | |
3393 | mips_xfer_memory, /* to_xfer_memory */ | |
3394 | mips_files_info, /* to_files_info */ | |
3395 | mips_insert_breakpoint, /* to_insert_breakpoint */ | |
3396 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
3397 | NULL, /* to_terminal_init */ | |
3398 | NULL, /* to_terminal_inferior */ | |
3399 | NULL, /* to_terminal_ours_for_output */ | |
3400 | NULL, /* to_terminal_ours */ | |
3401 | NULL, /* to_terminal_info */ | |
3402 | mips_kill, /* to_kill */ | |
3403 | mips_load, /* to_load */ | |
3404 | NULL, /* to_lookup_symbol */ | |
3405 | mips_create_inferior, /* to_create_inferior */ | |
3406 | mips_mourn_inferior, /* to_mourn_inferior */ | |
3407 | NULL, /* to_can_run */ | |
3408 | NULL, /* to_notice_signals */ | |
3409 | 0, /* to_thread_alive */ | |
3410 | 0, /* to_stop */ | |
3411 | process_stratum, /* to_stratum */ | |
3412 | NULL, /* to_next */ | |
3413 | 1, /* to_has_all_memory */ | |
3414 | 1, /* to_has_memory */ | |
3415 | 1, /* to_has_stack */ | |
3416 | 1, /* to_has_registers */ | |
3417 | 1, /* to_has_execution */ | |
3418 | NULL, /* sections */ | |
3419 | NULL, /* sections_end */ | |
3420 | OPS_MAGIC /* to_magic */ | |
3421 | }; | |
d6ca85a8 | 3422 | \f |
33742334 ILT |
3423 | void |
3424 | _initialize_remote_mips () | |
3425 | { | |
3426 | add_target (&mips_ops); | |
090d784a | 3427 | add_target (&pmon_ops); |
5dad8312 | 3428 | add_target (&ddb_ops); |
7061bb0e | 3429 | add_target (&lsi_ops); |
33742334 | 3430 | |
0907dc09 ILT |
3431 | add_show_from_set ( |
3432 | add_set_cmd ("timeout", no_class, var_zinteger, | |
3433 | (char *) &mips_receive_wait, | |
3434 | "Set timeout in seconds for remote MIPS serial I/O.", | |
3435 | &setlist), | |
3436 | &showlist); | |
3437 | ||
3438 | add_show_from_set ( | |
3439 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, | |
3440 | (char *) &mips_retransmit_wait, | |
3441 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
3442 | This is the number of seconds to wait for an acknowledgement to a packet\n\ | |
3443 | before resending the packet.", &setlist), | |
3444 | &showlist); | |
4c5bc9f4 SG |
3445 | |
3446 | add_show_from_set ( | |
3447 | add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, | |
3448 | (char *) &mips_syn_garbage, | |
3449 | "Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
3450 | This is the maximum number of characters GDB will ignore when trying to\n\ | |
3451 | synchronize with the remote system. A value of -1 means that there is no limit\n\ | |
3452 | (Note that these characters are printed out even though they are ignored.)", | |
3453 | &setlist), | |
3454 | &showlist); | |
8e493b61 MA |
3455 | |
3456 | add_show_from_set | |
3457 | (add_set_cmd ("monitor-prompt", class_obscure, var_string, | |
3458 | (char *) &mips_monitor_prompt, | |
3459 | "Set the prompt that GDB expects from the monitor.", | |
3460 | &setlist), | |
3461 | &showlist); | |
33742334 | 3462 | } |