Commit | Line | Data |
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c906108c SS |
1 | /* Memory-access and commands for remote NINDY process, for GDB. |
2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | Contributed by Intel Corporation. Modified from remote.c by Chris Benenati. | |
4 | ||
c5aa993b JM |
5 | GDB is distributed in the hope that it will be useful, but WITHOUT ANY |
6 | WARRANTY. No author or distributor accepts responsibility to anyone | |
7 | for the consequences of using it or for whether it serves any | |
8 | particular purpose or works at all, unless he says so in writing. | |
9 | Refer to the GDB General Public License for full details. | |
10 | ||
11 | Everyone is granted permission to copy, modify and redistribute GDB, | |
12 | but only under the conditions described in the GDB General Public | |
13 | License. A copy of this license is supposed to have been given to you | |
14 | along with GDB so you can know your rights and responsibilities. It | |
15 | should be in a file named COPYING. Among other things, the copyright | |
16 | notice and this notice must be preserved on all copies. | |
17 | ||
18 | In other words, go ahead and share GDB, but don't try to stop | |
19 | anyone else from sharing it farther. Help stamp out software hoarding! | |
20 | */ | |
c906108c SS |
21 | |
22 | /* | |
c5aa993b JM |
23 | Except for the data cache routines, this file bears little resemblence |
24 | to remote.c. A new (although similar) protocol has been specified, and | |
25 | portions of the code are entirely dependent on having an i80960 with a | |
26 | NINDY ROM monitor at the other end of the line. | |
27 | */ | |
c906108c SS |
28 | |
29 | /***************************************************************************** | |
30 | * | |
31 | * REMOTE COMMUNICATION PROTOCOL BETWEEN GDB960 AND THE NINDY ROM MONITOR. | |
32 | * | |
33 | * | |
34 | * MODES OF OPERATION | |
35 | * ----- -- --------- | |
36 | * | |
37 | * As far as NINDY is concerned, GDB is always in one of two modes: command | |
38 | * mode or passthrough mode. | |
39 | * | |
40 | * In command mode (the default) pre-defined packets containing requests | |
41 | * are sent by GDB to NINDY. NINDY never talks except in reponse to a request. | |
42 | * | |
43 | * Once the the user program is started, GDB enters passthrough mode, to give | |
44 | * the user program access to the terminal. GDB remains in this mode until | |
45 | * NINDY indicates that the program has stopped. | |
46 | * | |
47 | * | |
48 | * PASSTHROUGH MODE | |
49 | * ----------- ---- | |
50 | * | |
51 | * GDB writes all input received from the keyboard directly to NINDY, and writes | |
52 | * all characters received from NINDY directly to the monitor. | |
53 | * | |
54 | * Keyboard input is neither buffered nor echoed to the monitor. | |
55 | * | |
56 | * GDB remains in passthrough mode until NINDY sends a single ^P character, | |
57 | * to indicate that the user process has stopped. | |
58 | * | |
59 | * Note: | |
60 | * GDB assumes NINDY performs a 'flushreg' when the user program stops. | |
61 | * | |
62 | * | |
63 | * COMMAND MODE | |
64 | * ------- ---- | |
65 | * | |
66 | * All info (except for message ack and nak) is transferred between gdb | |
67 | * and the remote processor in messages of the following format: | |
68 | * | |
69 | * <info>#<checksum> | |
70 | * | |
71 | * where | |
72 | * # is a literal character | |
73 | * | |
74 | * <info> ASCII information; all numeric information is in the | |
75 | * form of hex digits ('0'-'9' and lowercase 'a'-'f'). | |
76 | * | |
77 | * <checksum> | |
78 | * is a pair of ASCII hex digits representing an 8-bit | |
79 | * checksum formed by adding together each of the | |
80 | * characters in <info>. | |
81 | * | |
82 | * The receiver of a message always sends a single character to the sender | |
83 | * to indicate that the checksum was good ('+') or bad ('-'); the sender | |
84 | * re-transmits the entire message over until a '+' is received. | |
85 | * | |
86 | * In response to a command NINDY always sends back either data or | |
87 | * a result code of the form "Xnn", where "nn" are hex digits and "X00" | |
88 | * means no errors. (Exceptions: the "s" and "c" commands don't respond.) | |
89 | * | |
90 | * SEE THE HEADER OF THE FILE "gdb.c" IN THE NINDY MONITOR SOURCE CODE FOR A | |
91 | * FULL DESCRIPTION OF LEGAL COMMANDS. | |
92 | * | |
93 | * SEE THE FILE "stop.h" IN THE NINDY MONITOR SOURCE CODE FOR A LIST | |
94 | * OF STOP CODES. | |
95 | * | |
96 | ***************************************************************************/ | |
97 | ||
98 | #include "defs.h" | |
99 | #include <signal.h> | |
100 | #include <sys/types.h> | |
101 | #include <setjmp.h> | |
102 | ||
103 | #include "frame.h" | |
104 | #include "inferior.h" | |
105 | #include "bfd.h" | |
106 | #include "symfile.h" | |
107 | #include "target.h" | |
108 | #include "gdbcore.h" | |
109 | #include "command.h" | |
110 | #include "floatformat.h" | |
111 | ||
03f2053f | 112 | #include "gdb_wait.h" |
c906108c SS |
113 | #include <sys/file.h> |
114 | #include <ctype.h> | |
115 | #include "serial.h" | |
116 | #include "nindy-share/env.h" | |
117 | #include "nindy-share/stop.h" | |
118 | ||
119 | #include "dcache.h" | |
120 | #include "remote-utils.h" | |
121 | ||
122 | static DCACHE *nindy_dcache; | |
123 | ||
c5aa993b JM |
124 | extern int unlink (); |
125 | extern char *getenv (); | |
126 | extern char *mktemp (); | |
c906108c SS |
127 | |
128 | extern void generic_mourn_inferior (); | |
129 | ||
130 | extern struct target_ops nindy_ops; | |
131 | extern FILE *instream; | |
132 | ||
133 | extern char ninStopWhy (); | |
134 | extern int ninMemGet (); | |
135 | extern int ninMemPut (); | |
136 | ||
c5aa993b JM |
137 | int nindy_initial_brk; /* nonzero if want to send an initial BREAK to nindy */ |
138 | int nindy_old_protocol; /* nonzero if want to use old protocol */ | |
139 | char *nindy_ttyname; /* name of tty to talk to nindy on, or null */ | |
c906108c | 140 | |
c5aa993b JM |
141 | #define DLE '\020' /* Character NINDY sends to indicate user program has |
142 | * halted. */ | |
c906108c SS |
143 | #define TRUE 1 |
144 | #define FALSE 0 | |
145 | ||
146 | /* From nindy-share/nindy.c. */ | |
147 | extern serial_t nindy_serial; | |
148 | ||
149 | static int have_regs = 0; /* 1 iff regs read since i960 last halted */ | |
150 | static int regs_changed = 0; /* 1 iff regs were modified since last read */ | |
151 | ||
c5aa993b | 152 | extern char *exists (); |
c906108c | 153 | |
a14ed312 | 154 | static void nindy_fetch_registers (int); |
c906108c | 155 | |
a14ed312 | 156 | static void nindy_store_registers (int); |
c906108c SS |
157 | \f |
158 | static char *savename; | |
159 | ||
160 | static void | |
161 | nindy_close (quitting) | |
162 | int quitting; | |
163 | { | |
164 | if (nindy_serial != NULL) | |
165 | SERIAL_CLOSE (nindy_serial); | |
166 | nindy_serial = NULL; | |
167 | ||
168 | if (savename) | |
169 | free (savename); | |
170 | savename = 0; | |
171 | } | |
172 | ||
173 | /* Open a connection to a remote debugger. | |
174 | FIXME, there should be "set" commands for the options that are | |
175 | now specified with gdb command-line options (old_protocol, | |
176 | and initial_brk). */ | |
177 | void | |
178 | nindy_open (name, from_tty) | |
c5aa993b JM |
179 | char *name; /* "/dev/ttyXX", "ttyXX", or "XX": tty to be opened */ |
180 | int from_tty; | |
c906108c SS |
181 | { |
182 | char baudrate[1024]; | |
183 | ||
184 | if (!name) | |
185 | error_no_arg ("serial port device name"); | |
186 | ||
187 | target_preopen (from_tty); | |
188 | ||
189 | nindy_close (0); | |
190 | ||
191 | have_regs = regs_changed = 0; | |
c5aa993b | 192 | nindy_dcache = dcache_init (ninMemGet, ninMemPut); |
c906108c SS |
193 | |
194 | /* Allow user to interrupt the following -- we could hang if there's | |
195 | no NINDY at the other end of the remote tty. */ | |
196 | immediate_quit++; | |
197 | /* If baud_rate is -1, then ninConnect will not recognize the baud rate | |
198 | and will deal with the situation in a (more or less) reasonable | |
199 | fashion. */ | |
c5aa993b JM |
200 | sprintf (baudrate, "%d", baud_rate); |
201 | ninConnect (name, baudrate, | |
202 | nindy_initial_brk, !from_tty, nindy_old_protocol); | |
c906108c SS |
203 | immediate_quit--; |
204 | ||
205 | if (nindy_serial == NULL) | |
206 | { | |
207 | perror_with_name (name); | |
208 | } | |
209 | ||
210 | savename = savestring (name, strlen (name)); | |
211 | push_target (&nindy_ops); | |
212 | ||
c5aa993b | 213 | target_fetch_registers (-1); |
c906108c SS |
214 | |
215 | init_thread_list (); | |
216 | init_wait_for_inferior (); | |
217 | clear_proceed_status (); | |
218 | normal_stop (); | |
219 | } | |
220 | ||
221 | /* User-initiated quit of nindy operations. */ | |
222 | ||
223 | static void | |
224 | nindy_detach (name, from_tty) | |
225 | char *name; | |
226 | int from_tty; | |
227 | { | |
228 | if (name) | |
229 | error ("Too many arguments"); | |
230 | pop_target (); | |
231 | } | |
232 | ||
233 | static void | |
234 | nindy_files_info () | |
235 | { | |
236 | /* FIXME: this lies about the baud rate if we autobauded. */ | |
c5aa993b JM |
237 | printf_unfiltered ("\tAttached to %s at %d bits per second%s%s.\n", savename, |
238 | baud_rate, | |
239 | nindy_old_protocol ? " in old protocol" : "", | |
240 | nindy_initial_brk ? " with initial break" : ""); | |
c906108c SS |
241 | } |
242 | \f | |
243 | /* Return the number of characters in the buffer before | |
244 | the first DLE character. */ | |
245 | ||
246 | static | |
247 | int | |
c5aa993b JM |
248 | non_dle (buf, n) |
249 | char *buf; /* Character buffer; NOT '\0'-terminated */ | |
250 | int n; /* Number of characters in buffer */ | |
c906108c SS |
251 | { |
252 | int i; | |
253 | ||
c5aa993b JM |
254 | for (i = 0; i < n; i++) |
255 | { | |
256 | if (buf[i] == DLE) | |
257 | { | |
258 | break; | |
259 | } | |
c906108c | 260 | } |
c906108c SS |
261 | return i; |
262 | } | |
263 | \f | |
264 | /* Tell the remote machine to resume. */ | |
265 | ||
266 | void | |
267 | nindy_resume (pid, step, siggnal) | |
268 | int pid, step; | |
269 | enum target_signal siggnal; | |
270 | { | |
271 | if (siggnal != TARGET_SIGNAL_0 && siggnal != stop_signal) | |
272 | warning ("Can't send signals to remote NINDY targets."); | |
273 | ||
c5aa993b JM |
274 | dcache_flush (nindy_dcache); |
275 | if (regs_changed) | |
c906108c SS |
276 | { |
277 | nindy_store_registers (-1); | |
278 | regs_changed = 0; | |
279 | } | |
280 | have_regs = 0; | |
c5aa993b | 281 | ninGo (step); |
c906108c SS |
282 | } |
283 | \f | |
284 | /* FIXME, we can probably use the normal terminal_inferior stuff here. | |
285 | We have to do terminal_inferior and then set up the passthrough | |
286 | settings initially. Thereafter, terminal_ours and terminal_inferior | |
287 | will automatically swap the settings around for us. */ | |
288 | ||
c5aa993b JM |
289 | struct clean_up_tty_args |
290 | { | |
c906108c SS |
291 | serial_ttystate state; |
292 | serial_t serial; | |
293 | }; | |
c5aa993b | 294 | static struct clean_up_tty_args tty_args; |
c906108c SS |
295 | |
296 | static void | |
297 | clean_up_tty (ptrarg) | |
298 | PTR ptrarg; | |
299 | { | |
300 | struct clean_up_tty_args *args = (struct clean_up_tty_args *) ptrarg; | |
301 | SERIAL_SET_TTY_STATE (args->serial, args->state); | |
302 | free (args->state); | |
303 | warning ("\n\nYou may need to reset the 80960 and/or reload your program.\n"); | |
304 | } | |
305 | ||
306 | /* Recover from ^Z or ^C while remote process is running */ | |
c5aa993b | 307 | static void (*old_ctrlc) (); |
c906108c | 308 | #ifdef SIGTSTP |
c5aa993b | 309 | static void (*old_ctrlz) (); |
c906108c SS |
310 | #endif |
311 | ||
312 | static void | |
c5aa993b | 313 | clean_up_int () |
c906108c SS |
314 | { |
315 | SERIAL_SET_TTY_STATE (tty_args.serial, tty_args.state); | |
316 | free (tty_args.state); | |
317 | ||
c5aa993b | 318 | signal (SIGINT, old_ctrlc); |
c906108c | 319 | #ifdef SIGTSTP |
c5aa993b | 320 | signal (SIGTSTP, old_ctrlz); |
c906108c | 321 | #endif |
c5aa993b | 322 | error ("\n\nYou may need to reset the 80960 and/or reload your program.\n"); |
c906108c SS |
323 | } |
324 | ||
325 | /* Wait until the remote machine stops. While waiting, operate in passthrough | |
326 | * mode; i.e., pass everything NINDY sends to gdb_stdout, and everything from | |
327 | * stdin to NINDY. | |
328 | * | |
329 | * Return to caller, storing status in 'status' just as `wait' would. | |
330 | */ | |
331 | ||
332 | static int | |
c5aa993b JM |
333 | nindy_wait (pid, status) |
334 | int pid; | |
335 | struct target_waitstatus *status; | |
c906108c SS |
336 | { |
337 | fd_set fds; | |
338 | int c; | |
339 | char buf[2]; | |
340 | int i, n; | |
341 | unsigned char stop_exit; | |
342 | unsigned char stop_code; | |
343 | struct cleanup *old_cleanups; | |
344 | long ip_value, fp_value, sp_value; /* Reg values from stop */ | |
345 | ||
346 | status->kind = TARGET_WAITKIND_EXITED; | |
347 | status->value.integer = 0; | |
348 | ||
349 | /* OPERATE IN PASSTHROUGH MODE UNTIL NINDY SENDS A DLE CHARACTER */ | |
350 | ||
351 | /* Save current tty attributes, and restore them when done. */ | |
352 | tty_args.serial = SERIAL_FDOPEN (0); | |
353 | tty_args.state = SERIAL_GET_TTY_STATE (tty_args.serial); | |
c5aa993b | 354 | old_ctrlc = signal (SIGINT, clean_up_int); |
c906108c | 355 | #ifdef SIGTSTP |
c5aa993b | 356 | old_ctrlz = signal (SIGTSTP, clean_up_int); |
c906108c SS |
357 | #endif |
358 | ||
359 | old_cleanups = make_cleanup (clean_up_tty, &tty_args); | |
360 | ||
361 | /* Pass input from keyboard to NINDY as it arrives. NINDY will interpret | |
362 | <CR> and perform echo. */ | |
363 | /* This used to set CBREAK and clear ECHO and CRMOD. I hope this is close | |
364 | enough. */ | |
365 | SERIAL_RAW (tty_args.serial); | |
366 | ||
367 | while (1) | |
368 | { | |
369 | /* Input on remote */ | |
370 | c = SERIAL_READCHAR (nindy_serial, -1); | |
371 | if (c == SERIAL_ERROR) | |
372 | { | |
373 | error ("Cannot read from serial line"); | |
374 | } | |
c5aa993b | 375 | else if (c == 0x1b) /* ESC */ |
c906108c SS |
376 | { |
377 | c = SERIAL_READCHAR (nindy_serial, -1); | |
378 | c &= ~0x40; | |
c5aa993b JM |
379 | } |
380 | else if (c != 0x10) /* DLE */ | |
c906108c SS |
381 | /* Write out any characters preceding DLE */ |
382 | { | |
c5aa993b | 383 | buf[0] = (char) c; |
c906108c SS |
384 | write (1, buf, 1); |
385 | } | |
386 | else | |
387 | { | |
c5aa993b JM |
388 | stop_exit = ninStopWhy (&stop_code, |
389 | &ip_value, &fp_value, &sp_value); | |
c906108c SS |
390 | if (!stop_exit && (stop_code == STOP_SRQ)) |
391 | { | |
392 | immediate_quit++; | |
c5aa993b | 393 | ninSrq (); |
c906108c SS |
394 | immediate_quit--; |
395 | } | |
396 | else | |
397 | { | |
398 | /* Get out of loop */ | |
c5aa993b JM |
399 | supply_register (IP_REGNUM, |
400 | (char *) &ip_value); | |
401 | supply_register (FP_REGNUM, | |
402 | (char *) &fp_value); | |
403 | supply_register (SP_REGNUM, | |
404 | (char *) &sp_value); | |
c906108c SS |
405 | break; |
406 | } | |
407 | } | |
408 | } | |
409 | ||
410 | SERIAL_SET_TTY_STATE (tty_args.serial, tty_args.state); | |
411 | free (tty_args.state); | |
412 | discard_cleanups (old_cleanups); | |
413 | ||
414 | if (stop_exit) | |
415 | { | |
416 | status->kind = TARGET_WAITKIND_EXITED; | |
417 | status->value.integer = stop_code; | |
418 | } | |
419 | else | |
420 | { | |
421 | /* nindy has some special stop code need to be handled */ | |
422 | if (stop_code == STOP_GDB_BPT) | |
423 | stop_code = TRACE_STEP; | |
424 | status->kind = TARGET_WAITKIND_STOPPED; | |
425 | status->value.sig = i960_fault_to_signal (stop_code); | |
426 | } | |
427 | return inferior_pid; | |
428 | } | |
429 | ||
430 | /* Read the remote registers into the block REGS. */ | |
431 | ||
432 | /* This is the block that ninRegsGet and ninRegsPut handles. */ | |
c5aa993b JM |
433 | struct nindy_regs |
434 | { | |
435 | char local_regs[16 * 4]; | |
436 | char global_regs[16 * 4]; | |
437 | char pcw_acw[2 * 4]; | |
438 | char ip[4]; | |
439 | char tcw[4]; | |
440 | char fp_as_double[4 * 8]; | |
c906108c SS |
441 | }; |
442 | ||
443 | static void | |
c5aa993b | 444 | nindy_fetch_registers (regno) |
c906108c SS |
445 | int regno; |
446 | { | |
447 | struct nindy_regs nindy_regs; | |
448 | int regnum; | |
449 | ||
450 | immediate_quit++; | |
c5aa993b | 451 | ninRegsGet ((char *) &nindy_regs); |
c906108c SS |
452 | immediate_quit--; |
453 | ||
c5aa993b JM |
454 | memcpy (®isters[REGISTER_BYTE (R0_REGNUM)], nindy_regs.local_regs, 16 * 4); |
455 | memcpy (®isters[REGISTER_BYTE (G0_REGNUM)], nindy_regs.global_regs, 16 * 4); | |
456 | memcpy (®isters[REGISTER_BYTE (PCW_REGNUM)], nindy_regs.pcw_acw, 2 * 4); | |
457 | memcpy (®isters[REGISTER_BYTE (IP_REGNUM)], nindy_regs.ip, 1 * 4); | |
458 | memcpy (®isters[REGISTER_BYTE (TCW_REGNUM)], nindy_regs.tcw, 1 * 4); | |
c906108c SS |
459 | memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], nindy_regs.fp_as_double, 4 * 8); |
460 | ||
461 | registers_fetched (); | |
462 | } | |
463 | ||
464 | static void | |
c5aa993b | 465 | nindy_prepare_to_store () |
c906108c SS |
466 | { |
467 | /* Fetch all regs if they aren't already here. */ | |
468 | read_register_bytes (0, NULL, REGISTER_BYTES); | |
469 | } | |
470 | ||
471 | static void | |
c5aa993b | 472 | nindy_store_registers (regno) |
c906108c SS |
473 | int regno; |
474 | { | |
475 | struct nindy_regs nindy_regs; | |
476 | int regnum; | |
477 | ||
c5aa993b JM |
478 | memcpy (nindy_regs.local_regs, ®isters[REGISTER_BYTE (R0_REGNUM)], 16 * 4); |
479 | memcpy (nindy_regs.global_regs, ®isters[REGISTER_BYTE (G0_REGNUM)], 16 * 4); | |
480 | memcpy (nindy_regs.pcw_acw, ®isters[REGISTER_BYTE (PCW_REGNUM)], 2 * 4); | |
481 | memcpy (nindy_regs.ip, ®isters[REGISTER_BYTE (IP_REGNUM)], 1 * 4); | |
482 | memcpy (nindy_regs.tcw, ®isters[REGISTER_BYTE (TCW_REGNUM)], 1 * 4); | |
483 | memcpy (nindy_regs.fp_as_double, ®isters[REGISTER_BYTE (FP0_REGNUM)], 8 * 4); | |
c906108c SS |
484 | |
485 | immediate_quit++; | |
c5aa993b | 486 | ninRegsPut ((char *) &nindy_regs); |
c906108c SS |
487 | immediate_quit--; |
488 | } | |
489 | ||
490 | /* Read a word from remote address ADDR and return it. | |
491 | * This goes through the data cache. | |
492 | */ | |
493 | int | |
494 | nindy_fetch_word (addr) | |
495 | CORE_ADDR addr; | |
496 | { | |
c5aa993b | 497 | return dcache_fetch (nindy_dcache, addr); |
c906108c SS |
498 | } |
499 | ||
500 | /* Write a word WORD into remote address ADDR. | |
501 | This goes through the data cache. */ | |
502 | ||
503 | void | |
504 | nindy_store_word (addr, word) | |
505 | CORE_ADDR addr; | |
506 | int word; | |
507 | { | |
c5aa993b | 508 | dcache_poke (nindy_dcache, addr, word); |
c906108c SS |
509 | } |
510 | ||
511 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR | |
512 | to debugger memory starting at MYADDR. Copy to inferior if | |
513 | WRITE is nonzero. Returns the length copied. | |
514 | ||
515 | This is stolen almost directly from infptrace.c's child_xfer_memory, | |
516 | which also deals with a word-oriented memory interface. Sometime, | |
517 | FIXME, rewrite this to not use the word-oriented routines. */ | |
518 | ||
519 | int | |
c5aa993b | 520 | nindy_xfer_inferior_memory (memaddr, myaddr, len, should_write, target) |
c906108c SS |
521 | CORE_ADDR memaddr; |
522 | char *myaddr; | |
523 | int len; | |
524 | int should_write; | |
c5aa993b | 525 | struct target_ops *target; /* ignored */ |
c906108c SS |
526 | { |
527 | register int i; | |
528 | /* Round starting address down to longword boundary. */ | |
c5aa993b | 529 | register CORE_ADDR addr = memaddr & -sizeof (int); |
c906108c SS |
530 | /* Round ending address up; get number of longwords that makes. */ |
531 | register int count | |
c5aa993b | 532 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); |
c906108c SS |
533 | /* Allocate buffer of that many longwords. */ |
534 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
535 | ||
536 | if (should_write) | |
537 | { | |
538 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
539 | ||
c5aa993b JM |
540 | if (addr != memaddr || len < (int) sizeof (int)) |
541 | { | |
542 | /* Need part of initial word -- fetch it. */ | |
543 | buffer[0] = nindy_fetch_word (addr); | |
544 | } | |
c906108c SS |
545 | |
546 | if (count > 1) /* FIXME, avoid if even boundary */ | |
547 | { | |
548 | buffer[count - 1] | |
549 | = nindy_fetch_word (addr + (count - 1) * sizeof (int)); | |
550 | } | |
551 | ||
552 | /* Copy data to be written over corresponding part of buffer */ | |
553 | ||
554 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
555 | ||
556 | /* Write the entire buffer. */ | |
557 | ||
558 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
559 | { | |
560 | errno = 0; | |
561 | nindy_store_word (addr, buffer[i]); | |
562 | if (errno) | |
563 | return 0; | |
564 | } | |
565 | } | |
566 | else | |
567 | { | |
568 | /* Read all the longwords */ | |
569 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
570 | { | |
571 | errno = 0; | |
572 | buffer[i] = nindy_fetch_word (addr); | |
573 | if (errno) | |
574 | return 0; | |
575 | QUIT; | |
576 | } | |
577 | ||
578 | /* Copy appropriate bytes out of the buffer. */ | |
579 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
580 | } | |
581 | return len; | |
582 | } | |
583 | \f | |
584 | static void | |
585 | nindy_create_inferior (execfile, args, env) | |
586 | char *execfile; | |
587 | char *args; | |
588 | char **env; | |
589 | { | |
590 | int entry_pt; | |
591 | int pid; | |
592 | ||
593 | if (args && *args) | |
594 | error ("Can't pass arguments to remote NINDY process"); | |
595 | ||
596 | if (execfile == 0 || exec_bfd == 0) | |
597 | error ("No executable file specified"); | |
598 | ||
599 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
600 | ||
601 | pid = 42; | |
602 | ||
603 | /* The "process" (board) is already stopped awaiting our commands, and | |
604 | the program is already downloaded. We just set its PC and go. */ | |
605 | ||
606 | inferior_pid = pid; /* Needed for wait_for_inferior below */ | |
607 | ||
608 | clear_proceed_status (); | |
609 | ||
610 | /* Tell wait_for_inferior that we've started a new process. */ | |
611 | init_wait_for_inferior (); | |
612 | ||
613 | /* Set up the "saved terminal modes" of the inferior | |
614 | based on what modes we are starting it with. */ | |
615 | target_terminal_init (); | |
616 | ||
617 | /* Install inferior's terminal modes. */ | |
618 | target_terminal_inferior (); | |
619 | ||
620 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
621 | /* Let 'er rip... */ | |
c5aa993b | 622 | proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
623 | } |
624 | ||
625 | static void | |
c5aa993b | 626 | reset_command (args, from_tty) |
c906108c SS |
627 | char *args; |
628 | int from_tty; | |
629 | { | |
630 | if (nindy_serial == NULL) | |
631 | { | |
c5aa993b | 632 | error ("No target system to reset -- use 'target nindy' command."); |
c906108c | 633 | } |
c5aa993b | 634 | if (query ("Really reset the target system?", 0, 0)) |
c906108c SS |
635 | { |
636 | SERIAL_SEND_BREAK (nindy_serial); | |
637 | tty_flush (nindy_serial); | |
638 | } | |
639 | } | |
640 | ||
641 | void | |
642 | nindy_kill (args, from_tty) | |
643 | char *args; | |
644 | int from_tty; | |
645 | { | |
c5aa993b | 646 | return; /* Ignore attempts to kill target system */ |
c906108c SS |
647 | } |
648 | ||
649 | /* Clean up when a program exits. | |
650 | ||
651 | The program actually lives on in the remote processor's RAM, and may be | |
652 | run again without a download. Don't leave it full of breakpoint | |
653 | instructions. */ | |
654 | ||
655 | void | |
656 | nindy_mourn_inferior () | |
657 | { | |
658 | remove_breakpoints (); | |
659 | unpush_target (&nindy_ops); | |
660 | generic_mourn_inferior (); /* Do all the proper things now */ | |
661 | } | |
662 | \f | |
663 | /* Pass the args the way catch_errors wants them. */ | |
664 | static int | |
665 | nindy_open_stub (arg) | |
666 | char *arg; | |
667 | { | |
668 | nindy_open (arg, 1); | |
669 | return 1; | |
670 | } | |
671 | ||
672 | static void | |
c5aa993b JM |
673 | nindy_load (filename, from_tty) |
674 | char *filename; | |
675 | int from_tty; | |
c906108c SS |
676 | { |
677 | asection *s; | |
678 | /* Can't do unix style forking on a VMS system, so we'll use bfd to do | |
679 | all the work for us | |
c5aa993b | 680 | */ |
c906108c | 681 | |
c5aa993b | 682 | bfd *file = bfd_openr (filename, 0); |
c906108c | 683 | if (!file) |
c906108c | 684 | { |
c5aa993b JM |
685 | perror_with_name (filename); |
686 | return; | |
c906108c | 687 | } |
c5aa993b JM |
688 | |
689 | if (!bfd_check_format (file, bfd_object)) | |
690 | { | |
691 | error ("can't prove it's an object file\n"); | |
692 | return; | |
693 | } | |
694 | ||
695 | for (s = file->sections; s; s = s->next) | |
696 | { | |
697 | if (s->flags & SEC_LOAD) | |
698 | { | |
699 | char *buffer = xmalloc (s->_raw_size); | |
700 | bfd_get_section_contents (file, s, buffer, 0, s->_raw_size); | |
701 | printf ("Loading section %s, size %x vma %x\n", | |
702 | s->name, | |
703 | s->_raw_size, | |
704 | s->vma); | |
705 | ninMemPut (s->vma, buffer, s->_raw_size); | |
706 | free (buffer); | |
707 | } | |
708 | } | |
709 | bfd_close (file); | |
c906108c SS |
710 | } |
711 | ||
712 | static int | |
713 | load_stub (arg) | |
714 | char *arg; | |
715 | { | |
716 | target_load (arg, 1); | |
717 | return 1; | |
718 | } | |
719 | ||
720 | /* This routine is run as a hook, just before the main command loop is | |
721 | entered. If gdb is configured for the i960, but has not had its | |
722 | nindy target specified yet, this will loop prompting the user to do so. | |
723 | ||
724 | Unlike the loop provided by Intel, we actually let the user get out | |
725 | of this with a RETURN. This is useful when e.g. simply examining | |
726 | an i960 object file on the host system. */ | |
727 | ||
728 | void | |
729 | nindy_before_main_loop () | |
730 | { | |
731 | char ttyname[100]; | |
732 | char *p, *p2; | |
733 | ||
c5aa993b | 734 | while (target_stack->target_ops != &nindy_ops) /* What is this crap??? */ |
c906108c | 735 | { /* remote tty not specified yet */ |
c5aa993b JM |
736 | if (instream == stdin) |
737 | { | |
738 | printf_unfiltered ("\nAttach /dev/ttyNN -- specify NN, or \"quit\" to quit: "); | |
739 | gdb_flush (gdb_stdout); | |
c906108c | 740 | } |
c5aa993b | 741 | fgets (ttyname, sizeof (ttyname) - 1, stdin); |
c906108c | 742 | |
c5aa993b JM |
743 | /* Strip leading and trailing whitespace */ |
744 | for (p = ttyname; isspace (*p); p++) | |
745 | { | |
746 | ; | |
c906108c | 747 | } |
c5aa993b JM |
748 | if (*p == '\0') |
749 | { | |
750 | return; /* User just hit spaces or return, wants out */ | |
c906108c | 751 | } |
c5aa993b JM |
752 | for (p2 = p; !isspace (*p2) && (*p2 != '\0'); p2++) |
753 | { | |
754 | ; | |
c906108c | 755 | } |
c5aa993b JM |
756 | *p2 = '\0'; |
757 | if (STREQ ("quit", p)) | |
758 | { | |
759 | exit (1); | |
c906108c SS |
760 | } |
761 | ||
c5aa993b JM |
762 | if (catch_errors (nindy_open_stub, p, "", RETURN_MASK_ALL)) |
763 | { | |
764 | /* Now that we have a tty open for talking to the remote machine, | |
765 | download the executable file if one was specified. */ | |
766 | if (exec_bfd) | |
767 | { | |
768 | catch_errors (load_stub, bfd_get_filename (exec_bfd), "", | |
769 | RETURN_MASK_ALL); | |
770 | } | |
771 | } | |
772 | } | |
c906108c SS |
773 | } |
774 | \f | |
775 | /* Define the target subroutine names */ | |
776 | ||
c5aa993b | 777 | struct target_ops nindy_ops; |
c906108c | 778 | |
c5aa993b JM |
779 | static void |
780 | init_nindy_ops (void) | |
c906108c | 781 | { |
c5aa993b JM |
782 | nindy_ops.to_shortname = "nindy"; |
783 | "Remote serial target in i960 NINDY-specific protocol", | |
784 | nindy_ops.to_longname = "Use a remote i960 system running NINDY connected by a serial line.\n\ | |
c906108c SS |
785 | Specify the name of the device the serial line is connected to.\n\ |
786 | The speed (baud rate), whether to use the old NINDY protocol,\n\ | |
787 | and whether to send a break on startup, are controlled by options\n\ | |
c5aa993b JM |
788 | specified when you started GDB."; |
789 | nindy_ops.to_doc = ""; | |
790 | nindy_ops.to_open = nindy_open; | |
791 | nindy_ops.to_close = nindy_close; | |
792 | nindy_ops.to_attach = 0; | |
c906108c SS |
793 | nindy_ops.to_post_attach = NULL; |
794 | nindy_ops.to_require_attach = NULL; | |
c5aa993b | 795 | nindy_ops.to_detach = nindy_detach; |
c906108c | 796 | nindy_ops.to_require_detach = NULL; |
c5aa993b JM |
797 | nindy_ops.to_resume = nindy_resume; |
798 | nindy_ops.to_wait = nindy_wait; | |
c906108c | 799 | nindy_ops.to_post_wait = NULL; |
c5aa993b JM |
800 | nindy_ops.to_fetch_registers = nindy_fetch_registers; |
801 | nindy_ops.to_store_registers = nindy_store_registers; | |
802 | nindy_ops.to_prepare_to_store = nindy_prepare_to_store; | |
803 | nindy_ops.to_xfer_memory = nindy_xfer_inferior_memory; | |
804 | nindy_ops.to_files_info = nindy_files_info; | |
805 | nindy_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
806 | nindy_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
807 | nindy_ops.to_terminal_init = 0; | |
808 | nindy_ops.to_terminal_inferior = 0; | |
809 | nindy_ops.to_terminal_ours_for_output = 0; | |
810 | nindy_ops.to_terminal_ours = 0; | |
811 | nindy_ops.to_terminal_info = 0; /* Terminal crud */ | |
812 | nindy_ops.to_kill = nindy_kill; | |
813 | nindy_ops.to_load = nindy_load; | |
814 | nindy_ops.to_lookup_symbol = 0; /* lookup_symbol */ | |
815 | nindy_ops.to_create_inferior = nindy_create_inferior; | |
c906108c SS |
816 | nindy_ops.to_post_startup_inferior = NULL; |
817 | nindy_ops.to_acknowledge_created_inferior = NULL; | |
818 | nindy_ops.to_clone_and_follow_inferior = NULL; | |
819 | nindy_ops.to_post_follow_inferior_by_clone = NULL; | |
820 | nindy_ops.to_insert_fork_catchpoint = NULL; | |
821 | nindy_ops.to_remove_fork_catchpoint = NULL; | |
822 | nindy_ops.to_insert_vfork_catchpoint = NULL; | |
823 | nindy_ops.to_remove_vfork_catchpoint = NULL; | |
824 | nindy_ops.to_has_forked = NULL; | |
825 | nindy_ops.to_has_vforked = NULL; | |
826 | nindy_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
827 | nindy_ops.to_post_follow_vfork = NULL; | |
828 | nindy_ops.to_insert_exec_catchpoint = NULL; | |
829 | nindy_ops.to_remove_exec_catchpoint = NULL; | |
830 | nindy_ops.to_has_execd = NULL; | |
831 | nindy_ops.to_reported_exec_events_per_exec_call = NULL; | |
832 | nindy_ops.to_has_exited = NULL; | |
c5aa993b JM |
833 | nindy_ops.to_mourn_inferior = nindy_mourn_inferior; |
834 | nindy_ops.to_can_run = 0; /* can_run */ | |
835 | nindy_ops.to_notice_signals = 0; /* notice_signals */ | |
836 | nindy_ops.to_thread_alive = 0; /* to_thread_alive */ | |
837 | nindy_ops.to_stop = 0; /* to_stop */ | |
c906108c SS |
838 | nindy_ops.to_pid_to_exec_file = NULL; |
839 | nindy_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
840 | nindy_ops.to_stratum = process_stratum; |
841 | nindy_ops.DONT_USE = 0; /* next */ | |
842 | nindy_ops.to_has_all_memory = 1; | |
843 | nindy_ops.to_has_memory = 1; | |
844 | nindy_ops.to_has_stack = 1; | |
845 | nindy_ops.to_has_registers = 1; | |
846 | nindy_ops.to_has_execution = 1; /* all mem, mem, stack, regs, exec */ | |
847 | nindy_ops.to_sections = 0; | |
848 | nindy_ops.to_sections_end = 0; /* Section pointers */ | |
849 | nindy_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
c906108c SS |
850 | } |
851 | ||
852 | void | |
853 | _initialize_nindy () | |
854 | { | |
c5aa993b | 855 | init_nindy_ops (); |
c906108c SS |
856 | add_target (&nindy_ops); |
857 | add_com ("reset", class_obscure, reset_command, | |
858 | "Send a 'break' to the remote target system.\n\ | |
859 | Only useful if the target has been equipped with a circuit\n\ | |
860 | to perform a hard reset when a break is detected."); | |
861 | } |