Commit | Line | Data |
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dd3b648e | 1 | /* Memory-access and commands for remote NINDY process, for GDB. |
58bcc08c | 2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. |
dd3b648e RP |
3 | Contributed by Intel Corporation. Modified from remote.c by Chris Benenati. |
4 | ||
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 | */ | |
21 | ||
22 | /* | |
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 | */ | |
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 | * | |
6ecb870e | 96 | ***************************************************************************/ |
dd3b648e | 97 | |
d747e0af | 98 | #include "defs.h" |
dd3b648e RP |
99 | #include <signal.h> |
100 | #include <sys/types.h> | |
101 | #include <setjmp.h> | |
102 | ||
dd3b648e RP |
103 | #include "frame.h" |
104 | #include "inferior.h" | |
77641260 | 105 | #include "bfd.h" |
6b27ebe8 | 106 | #include "symfile.h" |
dd3b648e RP |
107 | #include "target.h" |
108 | #include "gdbcore.h" | |
109 | #include "command.h" | |
48792545 | 110 | #include "floatformat.h" |
dd3b648e RP |
111 | |
112 | #include "wait.h" | |
dd3b648e RP |
113 | #include <sys/file.h> |
114 | #include <ctype.h> | |
704deef2 | 115 | #include "serial.h" |
dd3b648e RP |
116 | #include "nindy-share/env.h" |
117 | #include "nindy-share/stop.h" | |
118 | ||
5a0a463f | 119 | #include "dcache.h" |
a94abe5b | 120 | #include "remote-utils.h" |
5a0a463f RP |
121 | |
122 | static DCACHE *nindy_dcache; | |
123 | ||
dd3b648e RP |
124 | extern int unlink(); |
125 | extern char *getenv(); | |
126 | extern char *mktemp(); | |
127 | ||
dd3b648e RP |
128 | extern void generic_mourn_inferior (); |
129 | ||
130 | extern struct target_ops nindy_ops; | |
199b2450 | 131 | extern GDB_FILE *instream; |
dd3b648e RP |
132 | |
133 | extern char ninStopWhy (); | |
6deb63ab JK |
134 | extern int ninMemGet (); |
135 | extern int ninMemPut (); | |
dd3b648e RP |
136 | |
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 */ | |
140 | ||
141 | #define DLE '\020' /* Character NINDY sends to indicate user program has | |
142 | * halted. */ | |
143 | #define TRUE 1 | |
144 | #define FALSE 0 | |
145 | ||
704deef2 JK |
146 | /* From nindy-share/nindy.c. */ |
147 | extern serial_t nindy_serial; | |
148 | ||
dd3b648e RP |
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 | ||
152 | extern char *exists(); | |
e4db3f3e | 153 | |
e4db3f3e JG |
154 | static void |
155 | nindy_fetch_registers PARAMS ((int)); | |
156 | ||
157 | static void | |
158 | nindy_store_registers PARAMS ((int)); | |
dd3b648e | 159 | \f |
dd3b648e RP |
160 | static char *savename; |
161 | ||
162 | static void | |
163 | nindy_close (quitting) | |
164 | int quitting; | |
165 | { | |
704deef2 JK |
166 | if (nindy_serial != NULL) |
167 | SERIAL_CLOSE (nindy_serial); | |
168 | nindy_serial = NULL; | |
dd3b648e RP |
169 | |
170 | if (savename) | |
171 | free (savename); | |
172 | savename = 0; | |
173 | } | |
174 | ||
175 | /* Open a connection to a remote debugger. | |
b10f4dd9 JK |
176 | FIXME, there should be "set" commands for the options that are |
177 | now specified with gdb command-line options (old_protocol, | |
178 | and initial_brk). */ | |
dd3b648e RP |
179 | void |
180 | nindy_open (name, from_tty) | |
181 | char *name; /* "/dev/ttyXX", "ttyXX", or "XX": tty to be opened */ | |
182 | int from_tty; | |
183 | { | |
a94abe5b | 184 | char baudrate[1024]; |
dd3b648e RP |
185 | |
186 | if (!name) | |
187 | error_no_arg ("serial port device name"); | |
188 | ||
f2fc6e7a | 189 | target_preopen (from_tty); |
b10f4dd9 | 190 | |
dd3b648e RP |
191 | nindy_close (0); |
192 | ||
704deef2 | 193 | have_regs = regs_changed = 0; |
5a0a463f | 194 | nindy_dcache = dcache_init(ninMemGet, ninMemPut); |
dd3b648e | 195 | |
704deef2 JK |
196 | /* Allow user to interrupt the following -- we could hang if there's |
197 | no NINDY at the other end of the remote tty. */ | |
198 | immediate_quit++; | |
c20c1bdf JK |
199 | /* If baud_rate is -1, then ninConnect will not recognize the baud rate |
200 | and will deal with the situation in a (more or less) reasonable | |
201 | fashion. */ | |
202 | sprintf(baudrate, "%d", baud_rate); | |
a94abe5b | 203 | ninConnect(name, baudrate, |
704deef2 JK |
204 | nindy_initial_brk, !from_tty, nindy_old_protocol); |
205 | immediate_quit--; | |
dd3b648e | 206 | |
704deef2 JK |
207 | if (nindy_serial == NULL) |
208 | { | |
209 | perror_with_name (name); | |
210 | } | |
dd3b648e | 211 | |
704deef2 JK |
212 | savename = savestring (name, strlen (name)); |
213 | push_target (&nindy_ops); | |
214 | target_fetch_registers(-1); | |
dd3b648e RP |
215 | } |
216 | ||
217 | /* User-initiated quit of nindy operations. */ | |
218 | ||
219 | static void | |
220 | nindy_detach (name, from_tty) | |
221 | char *name; | |
222 | int from_tty; | |
223 | { | |
dd3b648e RP |
224 | if (name) |
225 | error ("Too many arguments"); | |
226 | pop_target (); | |
227 | } | |
228 | ||
229 | static void | |
230 | nindy_files_info () | |
231 | { | |
c20c1bdf JK |
232 | /* FIXME: this lies about the baud rate if we autobauded. */ |
233 | printf_unfiltered("\tAttached to %s at %d bits per second%s%s.\n", savename, | |
234 | baud_rate, | |
dd3b648e RP |
235 | nindy_old_protocol? " in old protocol": "", |
236 | nindy_initial_brk? " with initial break": ""); | |
237 | } | |
238 | \f | |
6b27ebe8 JK |
239 | /* Return the number of characters in the buffer before |
240 | the first DLE character. */ | |
dd3b648e RP |
241 | |
242 | static | |
243 | int | |
244 | non_dle( buf, n ) | |
245 | char *buf; /* Character buffer; NOT '\0'-terminated */ | |
246 | int n; /* Number of characters in buffer */ | |
247 | { | |
248 | int i; | |
249 | ||
250 | for ( i = 0; i < n; i++ ){ | |
251 | if ( buf[i] == DLE ){ | |
252 | break; | |
253 | } | |
254 | } | |
255 | return i; | |
256 | } | |
257 | \f | |
258 | /* Tell the remote machine to resume. */ | |
259 | ||
260 | void | |
25286543 | 261 | nindy_resume (pid, step, siggnal) |
67ac9759 JK |
262 | int pid, step; |
263 | enum target_signal siggnal; | |
dd3b648e | 264 | { |
67ac9759 JK |
265 | if (siggnal != TARGET_SIGNAL_0 && siggnal != stop_signal) |
266 | warning ("Can't send signals to remote NINDY targets."); | |
dd3b648e | 267 | |
5a0a463f | 268 | dcache_flush(nindy_dcache); |
dd3b648e | 269 | if ( regs_changed ){ |
df86eb44 | 270 | nindy_store_registers (-1); |
dd3b648e RP |
271 | regs_changed = 0; |
272 | } | |
273 | have_regs = 0; | |
274 | ninGo( step ); | |
275 | } | |
704deef2 JK |
276 | \f |
277 | /* FIXME, we can probably use the normal terminal_inferior stuff here. | |
278 | We have to do terminal_inferior and then set up the passthrough | |
279 | settings initially. Thereafter, terminal_ours and terminal_inferior | |
280 | will automatically swap the settings around for us. */ | |
281 | ||
282 | struct clean_up_tty_args { | |
283 | serial_ttystate state; | |
284 | serial_t serial; | |
285 | }; | |
cac390d4 | 286 | static struct clean_up_tty_args tty_args; |
704deef2 JK |
287 | |
288 | static void | |
289 | clean_up_tty (ptrarg) | |
290 | PTR ptrarg; | |
291 | { | |
292 | struct clean_up_tty_args *args = (struct clean_up_tty_args *) ptrarg; | |
293 | SERIAL_SET_TTY_STATE (args->serial, args->state); | |
294 | free (args->state); | |
cac390d4 SG |
295 | warning ("\n\nYou may need to reset the 80960 and/or reload your program.\n"); |
296 | } | |
297 | ||
298 | /* Recover from ^Z or ^C while remote process is running */ | |
299 | static void (*old_ctrlc)(); | |
300 | #ifdef SIGTSTP | |
301 | static void (*old_ctrlz)(); | |
302 | #endif | |
303 | ||
304 | static void | |
305 | clean_up_int() | |
306 | { | |
307 | SERIAL_SET_TTY_STATE (tty_args.serial, tty_args.state); | |
308 | free (tty_args.state); | |
309 | ||
310 | signal(SIGINT, old_ctrlc); | |
311 | #ifdef SIGTSTP | |
312 | signal(SIGTSTP, old_ctrlz); | |
313 | #endif | |
314 | error("\n\nYou may need to reset the 80960 and/or reload your program.\n"); | |
704deef2 | 315 | } |
dd3b648e RP |
316 | |
317 | /* Wait until the remote machine stops. While waiting, operate in passthrough | |
199b2450 | 318 | * mode; i.e., pass everything NINDY sends to gdb_stdout, and everything from |
dd3b648e RP |
319 | * stdin to NINDY. |
320 | * | |
321 | * Return to caller, storing status in 'status' just as `wait' would. | |
322 | */ | |
323 | ||
e4db3f3e | 324 | static int |
de43d7d0 SG |
325 | nindy_wait( pid, status ) |
326 | int pid; | |
67ac9759 | 327 | struct target_waitstatus *status; |
dd3b648e | 328 | { |
704deef2 | 329 | fd_set fds; |
cac390d4 SG |
330 | int c; |
331 | char buf[2]; | |
704deef2 JK |
332 | int i, n; |
333 | unsigned char stop_exit; | |
334 | unsigned char stop_code; | |
704deef2 JK |
335 | struct cleanup *old_cleanups; |
336 | long ip_value, fp_value, sp_value; /* Reg values from stop */ | |
337 | ||
67ac9759 JK |
338 | status->kind = TARGET_WAITKIND_EXITED; |
339 | status->value.integer = 0; | |
704deef2 JK |
340 | |
341 | /* OPERATE IN PASSTHROUGH MODE UNTIL NINDY SENDS A DLE CHARACTER */ | |
342 | ||
343 | /* Save current tty attributes, and restore them when done. */ | |
344 | tty_args.serial = SERIAL_FDOPEN (0); | |
345 | tty_args.state = SERIAL_GET_TTY_STATE (tty_args.serial); | |
cac390d4 SG |
346 | old_ctrlc = signal( SIGINT, clean_up_int ); |
347 | #ifdef SIGTSTP | |
348 | old_ctrlz = signal( SIGTSTP, clean_up_int ); | |
349 | #endif | |
350 | ||
704deef2 JK |
351 | old_cleanups = make_cleanup (clean_up_tty, &tty_args); |
352 | ||
353 | /* Pass input from keyboard to NINDY as it arrives. NINDY will interpret | |
354 | <CR> and perform echo. */ | |
355 | /* This used to set CBREAK and clear ECHO and CRMOD. I hope this is close | |
356 | enough. */ | |
357 | SERIAL_RAW (tty_args.serial); | |
358 | ||
359 | while (1) | |
360 | { | |
cac390d4 SG |
361 | /* Input on remote */ |
362 | c = SERIAL_READCHAR (nindy_serial, 0); | |
363 | if (c == SERIAL_ERROR) | |
704deef2 | 364 | { |
cac390d4 | 365 | error ("Cannot read from serial line"); |
704deef2 | 366 | } |
cac390d4 SG |
367 | else if (c == 0x1b) /* ESC */ |
368 | { | |
369 | c = SERIAL_READCHAR (nindy_serial, 0); | |
370 | c &= ~0x40; | |
371 | } | |
372 | else if (c != 0x10) /* DLE */ | |
373 | /* Write out any characters preceding DLE */ | |
374 | { | |
375 | buf[0] = (char)c; | |
376 | write (1, buf, 1); | |
377 | } | |
378 | else | |
704deef2 | 379 | { |
704deef2 JK |
380 | stop_exit = ninStopWhy(&stop_code, |
381 | &ip_value, &fp_value, &sp_value); | |
382 | if (!stop_exit && (stop_code == STOP_SRQ)) | |
383 | { | |
384 | immediate_quit++; | |
385 | ninSrq(); | |
386 | immediate_quit--; | |
387 | } | |
388 | else | |
389 | { | |
390 | /* Get out of loop */ | |
391 | supply_register (IP_REGNUM, | |
392 | (char *)&ip_value); | |
393 | supply_register (FP_REGNUM, | |
394 | (char *)&fp_value); | |
395 | supply_register (SP_REGNUM, | |
396 | (char *)&sp_value); | |
397 | break; | |
398 | } | |
704deef2 | 399 | } |
704deef2 | 400 | } |
dd3b648e | 401 | |
cac390d4 SG |
402 | SERIAL_SET_TTY_STATE (tty_args.serial, tty_args.state); |
403 | free (tty_args.state); | |
404 | discard_cleanups (old_cleanups); | |
704deef2 JK |
405 | |
406 | if (stop_exit) | |
407 | { | |
67ac9759 JK |
408 | status->kind = TARGET_WAITKIND_EXITED; |
409 | status->value.integer = stop_code; | |
704deef2 JK |
410 | } |
411 | else | |
412 | { | |
cac390d4 SG |
413 | /* nindy has some special stop code need to be handled */ |
414 | if (stop_code == STOP_GDB_BPT) | |
415 | stop_code = TRACE_STEP; | |
67ac9759 JK |
416 | status->kind = TARGET_WAITKIND_STOPPED; |
417 | status->value.sig = i960_fault_to_signal (stop_code); | |
704deef2 JK |
418 | } |
419 | return inferior_pid; | |
dd3b648e RP |
420 | } |
421 | ||
422 | /* Read the remote registers into the block REGS. */ | |
423 | ||
424 | /* This is the block that ninRegsGet and ninRegsPut handles. */ | |
425 | struct nindy_regs { | |
426 | char local_regs[16 * 4]; | |
427 | char global_regs[16 * 4]; | |
428 | char pcw_acw[2 * 4]; | |
429 | char ip[4]; | |
430 | char tcw[4]; | |
431 | char fp_as_double[4 * 8]; | |
432 | }; | |
433 | ||
120f867e | 434 | static void |
dd3b648e RP |
435 | nindy_fetch_registers(regno) |
436 | int regno; | |
437 | { | |
438 | struct nindy_regs nindy_regs; | |
439 | int regnum, inv; | |
440 | double dub; | |
441 | ||
442 | immediate_quit++; | |
443 | ninRegsGet( (char *) &nindy_regs ); | |
444 | immediate_quit--; | |
445 | ||
704deef2 JK |
446 | memcpy (®isters[REGISTER_BYTE (R0_REGNUM)], nindy_regs.local_regs, 16*4); |
447 | memcpy (®isters[REGISTER_BYTE (G0_REGNUM)], nindy_regs.global_regs, 16*4); | |
448 | memcpy (®isters[REGISTER_BYTE (PCW_REGNUM)], nindy_regs.pcw_acw, 2*4); | |
449 | memcpy (®isters[REGISTER_BYTE (IP_REGNUM)], nindy_regs.ip, 1*4); | |
450 | memcpy (®isters[REGISTER_BYTE (TCW_REGNUM)], nindy_regs.tcw, 1*4); | |
dd3b648e RP |
451 | for (regnum = FP0_REGNUM; regnum < FP0_REGNUM + 4; regnum++) { |
452 | dub = unpack_double (builtin_type_double, | |
453 | &nindy_regs.fp_as_double[8 * (regnum - FP0_REGNUM)], | |
454 | &inv); | |
455 | /* dub now in host byte order */ | |
48792545 | 456 | floatformat_from_double (&floatformat_i960_ext, &dub, |
dd3b648e RP |
457 | ®isters[REGISTER_BYTE (regnum)]); |
458 | } | |
459 | ||
460 | registers_fetched (); | |
dd3b648e RP |
461 | } |
462 | ||
463 | static void | |
464 | nindy_prepare_to_store() | |
465 | { | |
4ddd278f JG |
466 | /* Fetch all regs if they aren't already here. */ |
467 | read_register_bytes (0, NULL, REGISTER_BYTES); | |
dd3b648e RP |
468 | } |
469 | ||
120f867e | 470 | static void |
dd3b648e RP |
471 | nindy_store_registers(regno) |
472 | int regno; | |
473 | { | |
474 | struct nindy_regs nindy_regs; | |
bf5c0d64 | 475 | int regnum; |
dd3b648e RP |
476 | double dub; |
477 | ||
704deef2 JK |
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); | |
bf5c0d64 JK |
483 | for (regnum = FP0_REGNUM; regnum < FP0_REGNUM + 4; regnum++) |
484 | { | |
48792545 JK |
485 | floatformat_to_double (&floatformat_i960_ext, |
486 | ®isters[REGISTER_BYTE (regnum)], &dub); | |
bf5c0d64 JK |
487 | store_floating (&nindy_regs.fp_as_double[8 * (regnum - FP0_REGNUM)], |
488 | REGISTER_VIRTUAL_SIZE (regnum), | |
489 | dub); | |
490 | } | |
dd3b648e RP |
491 | |
492 | immediate_quit++; | |
493 | ninRegsPut( (char *) &nindy_regs ); | |
494 | immediate_quit--; | |
dd3b648e RP |
495 | } |
496 | ||
497 | /* Read a word from remote address ADDR and return it. | |
498 | * This goes through the data cache. | |
499 | */ | |
500 | int | |
501 | nindy_fetch_word (addr) | |
502 | CORE_ADDR addr; | |
503 | { | |
5a0a463f | 504 | return dcache_fetch (nindy_dcache, addr); |
dd3b648e RP |
505 | } |
506 | ||
507 | /* Write a word WORD into remote address ADDR. | |
508 | This goes through the data cache. */ | |
509 | ||
510 | void | |
511 | nindy_store_word (addr, word) | |
512 | CORE_ADDR addr; | |
513 | int word; | |
514 | { | |
5a0a463f | 515 | dcache_poke (nindy_dcache, addr, word); |
dd3b648e RP |
516 | } |
517 | ||
518 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR | |
519 | to debugger memory starting at MYADDR. Copy to inferior if | |
520 | WRITE is nonzero. Returns the length copied. | |
521 | ||
522 | This is stolen almost directly from infptrace.c's child_xfer_memory, | |
523 | which also deals with a word-oriented memory interface. Sometime, | |
524 | FIXME, rewrite this to not use the word-oriented routines. */ | |
525 | ||
526 | int | |
8f1f2a72 | 527 | nindy_xfer_inferior_memory(memaddr, myaddr, len, write, target) |
dd3b648e RP |
528 | CORE_ADDR memaddr; |
529 | char *myaddr; | |
530 | int len; | |
531 | int write; | |
8f1f2a72 | 532 | struct target_ops *target; /* ignored */ |
dd3b648e RP |
533 | { |
534 | register int i; | |
535 | /* Round starting address down to longword boundary. */ | |
536 | register CORE_ADDR addr = memaddr & - sizeof (int); | |
537 | /* Round ending address up; get number of longwords that makes. */ | |
538 | register int count | |
539 | = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
540 | /* Allocate buffer of that many longwords. */ | |
541 | register int *buffer = (int *) alloca (count * sizeof (int)); | |
542 | ||
543 | if (write) | |
544 | { | |
545 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
546 | ||
547 | if (addr != memaddr || len < (int)sizeof (int)) { | |
548 | /* Need part of initial word -- fetch it. */ | |
549 | buffer[0] = nindy_fetch_word (addr); | |
550 | } | |
551 | ||
552 | if (count > 1) /* FIXME, avoid if even boundary */ | |
553 | { | |
554 | buffer[count - 1] | |
555 | = nindy_fetch_word (addr + (count - 1) * sizeof (int)); | |
556 | } | |
557 | ||
558 | /* Copy data to be written over corresponding part of buffer */ | |
559 | ||
704deef2 | 560 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
dd3b648e RP |
561 | |
562 | /* Write the entire buffer. */ | |
563 | ||
564 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
565 | { | |
566 | errno = 0; | |
567 | nindy_store_word (addr, buffer[i]); | |
568 | if (errno) | |
569 | return 0; | |
570 | } | |
571 | } | |
572 | else | |
573 | { | |
574 | /* Read all the longwords */ | |
575 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
576 | { | |
577 | errno = 0; | |
578 | buffer[i] = nindy_fetch_word (addr); | |
579 | if (errno) | |
580 | return 0; | |
581 | QUIT; | |
582 | } | |
583 | ||
584 | /* Copy appropriate bytes out of the buffer. */ | |
704deef2 | 585 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); |
dd3b648e RP |
586 | } |
587 | return len; | |
588 | } | |
589 | \f | |
dd3b648e RP |
590 | static void |
591 | nindy_create_inferior (execfile, args, env) | |
592 | char *execfile; | |
593 | char *args; | |
594 | char **env; | |
595 | { | |
596 | int entry_pt; | |
597 | int pid; | |
598 | ||
599 | if (args && *args) | |
600 | error ("Can't pass arguments to remote NINDY process"); | |
601 | ||
602 | if (execfile == 0 || exec_bfd == 0) | |
603 | error ("No exec file specified"); | |
604 | ||
605 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
606 | ||
607 | pid = 42; | |
608 | ||
5d76c8e6 JK |
609 | /* The "process" (board) is already stopped awaiting our commands, and |
610 | the program is already downloaded. We just set its PC and go. */ | |
dd3b648e RP |
611 | |
612 | inferior_pid = pid; /* Needed for wait_for_inferior below */ | |
613 | ||
614 | clear_proceed_status (); | |
615 | ||
dd3b648e RP |
616 | /* Tell wait_for_inferior that we've started a new process. */ |
617 | init_wait_for_inferior (); | |
618 | ||
619 | /* Set up the "saved terminal modes" of the inferior | |
620 | based on what modes we are starting it with. */ | |
621 | target_terminal_init (); | |
622 | ||
623 | /* Install inferior's terminal modes. */ | |
624 | target_terminal_inferior (); | |
625 | ||
dd3b648e | 626 | /* insert_step_breakpoint (); FIXME, do we need this? */ |
45dc9be3 JK |
627 | /* Let 'er rip... */ |
628 | proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
dd3b648e RP |
629 | } |
630 | ||
631 | static void | |
632 | reset_command(args, from_tty) | |
633 | char *args; | |
634 | int from_tty; | |
635 | { | |
704deef2 JK |
636 | if (nindy_serial == NULL) |
637 | { | |
638 | error( "No target system to reset -- use 'target nindy' command."); | |
639 | } | |
640 | if ( query("Really reset the target system?",0,0) ) | |
641 | { | |
642 | SERIAL_SEND_BREAK (nindy_serial); | |
643 | tty_flush (nindy_serial); | |
644 | } | |
dd3b648e RP |
645 | } |
646 | ||
647 | void | |
648 | nindy_kill (args, from_tty) | |
649 | char *args; | |
650 | int from_tty; | |
651 | { | |
652 | return; /* Ignore attempts to kill target system */ | |
653 | } | |
654 | ||
655 | /* Clean up when a program exits. | |
656 | ||
657 | The program actually lives on in the remote processor's RAM, and may be | |
658 | run again without a download. Don't leave it full of breakpoint | |
659 | instructions. */ | |
660 | ||
661 | void | |
662 | nindy_mourn_inferior () | |
663 | { | |
664 | remove_breakpoints (); | |
71607f9d | 665 | unpush_target (&nindy_ops); |
dd3b648e RP |
666 | generic_mourn_inferior (); /* Do all the proper things now */ |
667 | } | |
668 | \f | |
9748446f JK |
669 | /* Pass the args the way catch_errors wants them. */ |
670 | static int | |
671 | nindy_open_stub (arg) | |
672 | char *arg; | |
673 | { | |
674 | nindy_open (arg, 1); | |
675 | return 1; | |
676 | } | |
677 | ||
678 | static int | |
679 | load_stub (arg) | |
680 | char *arg; | |
681 | { | |
682 | target_load (arg, 1); | |
683 | return 1; | |
684 | } | |
685 | ||
dd3b648e RP |
686 | /* This routine is run as a hook, just before the main command loop is |
687 | entered. If gdb is configured for the i960, but has not had its | |
688 | nindy target specified yet, this will loop prompting the user to do so. | |
689 | ||
690 | Unlike the loop provided by Intel, we actually let the user get out | |
691 | of this with a RETURN. This is useful when e.g. simply examining | |
692 | an i960 object file on the host system. */ | |
693 | ||
df86eb44 | 694 | void |
dd3b648e RP |
695 | nindy_before_main_loop () |
696 | { | |
697 | char ttyname[100]; | |
698 | char *p, *p2; | |
699 | ||
cad1498f SG |
700 | while (target_stack->target_ops != &nindy_ops) /* What is this crap??? */ |
701 | { /* remote tty not specified yet */ | |
dd3b648e | 702 | if ( instream == stdin ){ |
199b2450 TL |
703 | printf_unfiltered("\nAttach /dev/ttyNN -- specify NN, or \"quit\" to quit: "); |
704 | gdb_flush( gdb_stdout ); | |
dd3b648e RP |
705 | } |
706 | fgets( ttyname, sizeof(ttyname)-1, stdin ); | |
707 | ||
708 | /* Strip leading and trailing whitespace */ | |
709 | for ( p = ttyname; isspace(*p); p++ ){ | |
710 | ; | |
711 | } | |
712 | if ( *p == '\0' ){ | |
713 | return; /* User just hit spaces or return, wants out */ | |
714 | } | |
715 | for ( p2= p; !isspace(*p2) && (*p2 != '\0'); p2++ ){ | |
716 | ; | |
717 | } | |
718 | *p2= '\0'; | |
2e4964ad | 719 | if ( STREQ("quit",p) ){ |
dd3b648e RP |
720 | exit(1); |
721 | } | |
722 | ||
9748446f JK |
723 | if (catch_errors (nindy_open_stub, p, "", RETURN_MASK_ALL)) |
724 | { | |
725 | /* Now that we have a tty open for talking to the remote machine, | |
726 | download the executable file if one was specified. */ | |
727 | if (exec_bfd) | |
728 | { | |
729 | catch_errors (load_stub, bfd_get_filename (exec_bfd), "", | |
730 | RETURN_MASK_ALL); | |
731 | } | |
732 | } | |
dd3b648e RP |
733 | } |
734 | } | |
735 | \f | |
736 | /* Define the target subroutine names */ | |
737 | ||
738 | struct target_ops nindy_ops = { | |
739 | "nindy", "Remote serial target in i960 NINDY-specific protocol", | |
f2fc6e7a JK |
740 | "Use a remote i960 system running NINDY connected by a serial line.\n\ |
741 | Specify the name of the device the serial line is connected to.\n\ | |
742 | The speed (baud rate), whether to use the old NINDY protocol,\n\ | |
743 | and whether to send a break on startup, are controlled by options\n\ | |
744 | specified when you started GDB.", | |
dd3b648e | 745 | nindy_open, nindy_close, |
58bcc08c JG |
746 | 0, |
747 | nindy_detach, | |
748 | nindy_resume, | |
749 | nindy_wait, | |
dd3b648e | 750 | nindy_fetch_registers, nindy_store_registers, |
a03d4f8e | 751 | nindy_prepare_to_store, |
dd3b648e | 752 | nindy_xfer_inferior_memory, nindy_files_info, |
771d7a99 SC |
753 | memory_insert_breakpoint, |
754 | memory_remove_breakpoint, | |
dd3b648e RP |
755 | 0, 0, 0, 0, 0, /* Terminal crud */ |
756 | nindy_kill, | |
6b27ebe8 | 757 | generic_load, |
dd3b648e RP |
758 | 0, /* lookup_symbol */ |
759 | nindy_create_inferior, | |
760 | nindy_mourn_inferior, | |
0256270d KR |
761 | 0, /* can_run */ |
762 | 0, /* notice_signals */ | |
78b459a7 | 763 | 0, /* to_stop */ |
dd3b648e RP |
764 | process_stratum, 0, /* next */ |
765 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
8f1f2a72 | 766 | 0, 0, /* Section pointers */ |
dd3b648e RP |
767 | OPS_MAGIC, /* Always the last thing */ |
768 | }; | |
769 | ||
770 | void | |
771 | _initialize_nindy () | |
772 | { | |
773 | add_target (&nindy_ops); | |
774 | add_com ("reset", class_obscure, reset_command, | |
775 | "Send a 'break' to the remote target system.\n\ | |
776 | Only useful if the target has been equipped with a circuit\n\ | |
777 | to perform a hard reset when a break is detected."); | |
778 | } |