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