Commit | Line | Data |
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2a24676e DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
9a3bab7a | 6 | |
2a24676e | 7 | #ifndef lint |
24350cae | 8 | static char sccsid[] = "@(#)process.c 5.3 (Berkeley) %G%"; |
2a24676e | 9 | #endif not lint |
0022c355 | 10 | |
24350cae | 11 | static char rcsid[] = "$Header: process.c,v 1.4 88/01/10 00:49:31 donn Exp $"; |
9a3bab7a ML |
12 | |
13 | /* | |
14 | * Process management. | |
15 | * | |
16 | * This module contains the routines to manage the execution and | |
17 | * tracing of the debuggee process. | |
18 | */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "process.h" | |
22 | #include "machine.h" | |
23 | #include "events.h" | |
24 | #include "tree.h" | |
8ee6535a | 25 | #include "eval.h" |
9a3bab7a ML |
26 | #include "operators.h" |
27 | #include "source.h" | |
28 | #include "object.h" | |
29 | #include "mappings.h" | |
30 | #include "main.h" | |
31 | #include "coredump.h" | |
32 | #include <signal.h> | |
33 | #include <errno.h> | |
9a3bab7a ML |
34 | #include <sys/stat.h> |
35 | ||
36 | #ifndef public | |
37 | ||
38 | typedef struct Process *Process; | |
39 | ||
40 | Process process; | |
41 | ||
8ee6535a ML |
42 | #define DEFSIG -1 |
43 | ||
9a3bab7a ML |
44 | #include "machine.h" |
45 | ||
46 | #endif | |
47 | ||
48 | #define NOTSTARTED 1 | |
49 | #define STOPPED 0177 | |
50 | #define FINISHED 0 | |
51 | ||
52 | /* | |
2fd0f574 SL |
53 | * A cache of the instruction segment is kept to reduce the number |
54 | * of system calls. Might be better just to read the entire | |
55 | * code space into memory. | |
9a3bab7a ML |
56 | */ |
57 | ||
24350cae | 58 | #define CACHESIZE 1003 |
9a3bab7a ML |
59 | |
60 | typedef struct { | |
61 | Word addr; | |
62 | Word val; | |
63 | } CacheWord; | |
64 | ||
65 | /* | |
66 | * This structure holds the information we need from the user structure. | |
67 | */ | |
68 | ||
69 | struct Process { | |
70 | int pid; /* process being traced */ | |
5870175c ML |
71 | int mask; /* process status word */ |
72 | Word reg[NREG]; /* process' registers */ | |
9a3bab7a ML |
73 | Word oreg[NREG]; /* registers when process last stopped */ |
74 | short status; /* either STOPPED or FINISHED */ | |
75 | short signo; /* signal that stopped process */ | |
0022c355 | 76 | short sigcode; /* extra signal information */ |
9a3bab7a ML |
77 | int exitval; /* return value from exit() */ |
78 | long sigset; /* bit array of traced signals */ | |
24350cae | 79 | CacheWord word[CACHESIZE]; /* text segment cache */ |
5870175c | 80 | Ttyinfo ttyinfo; /* process' terminal characteristics */ |
2fd0f574 | 81 | Address sigstatus; /* process' handler for current signal */ |
9a3bab7a ML |
82 | }; |
83 | ||
84 | /* | |
85 | * These definitions are for the arguments to "pio". | |
86 | */ | |
87 | ||
88 | typedef enum { PREAD, PWRITE } PioOp; | |
89 | typedef enum { TEXTSEG, DATASEG } PioSeg; | |
90 | ||
91 | private struct Process pbuf; | |
92 | ||
0022c355 | 93 | #define MAXNCMDARGS 1000 /* maximum number of arguments to RUN */ |
9a3bab7a | 94 | |
ca69b757 ML |
95 | extern int errno; |
96 | ||
9a3bab7a ML |
97 | private Boolean just_started; |
98 | private int argc; | |
99 | private String argv[MAXNCMDARGS]; | |
100 | private String infile, outfile; | |
101 | ||
102 | /* | |
103 | * Initialize process information. | |
104 | */ | |
105 | ||
106 | public process_init() | |
107 | { | |
24350cae DS |
108 | register integer i; |
109 | char buf[10]; | |
9a3bab7a ML |
110 | |
111 | process = &pbuf; | |
112 | process->status = (coredump) ? STOPPED : NOTSTARTED; | |
113 | setsigtrace(); | |
24350cae DS |
114 | # if vax || tahoe |
115 | for (i = 0; i < NREG; i++) { | |
116 | sprintf(buf, "$r%d", i); | |
117 | defregname(identname(buf, false), i); | |
118 | } | |
119 | # ifdef vax | |
120 | defregname(identname("$ap", true), ARGP); | |
121 | # endif | |
122 | # else | |
123 | # ifdef mc68000 | |
124 | for (i = 0; i < 8; i++) { | |
125 | sprintf(buf, "$d%d", i); | |
126 | defregname(identname(buf, false), i); | |
127 | sprintf(buf, "$a%d", i); | |
128 | defregname(identname(buf, false), i + 8); | |
129 | } | |
130 | # endif | |
131 | # endif | |
9a3bab7a ML |
132 | defregname(identname("$fp", true), FRP); |
133 | defregname(identname("$sp", true), STKP); | |
134 | defregname(identname("$pc", true), PROGCTR); | |
135 | if (coredump) { | |
136 | coredump_readin(process->mask, process->reg, process->signo); | |
4e067a2c | 137 | pc = process->reg[PROGCTR]; |
9a3bab7a | 138 | } |
4e067a2c | 139 | arginit(); |
9a3bab7a ML |
140 | } |
141 | ||
142 | /* | |
143 | * Routines to get at process information from outside this module. | |
144 | */ | |
145 | ||
146 | public Word reg(n) | |
147 | Integer n; | |
148 | { | |
149 | register Word w; | |
150 | ||
151 | if (n == NREG) { | |
152 | w = process->mask; | |
153 | } else { | |
154 | w = process->reg[n]; | |
155 | } | |
156 | return w; | |
157 | } | |
158 | ||
159 | public setreg(n, w) | |
160 | Integer n; | |
161 | Word w; | |
162 | { | |
163 | process->reg[n] = w; | |
164 | } | |
165 | ||
166 | /* | |
167 | * Begin execution. | |
168 | * | |
169 | * We set a breakpoint at the end of the code so that the | |
170 | * process data doesn't disappear after the program terminates. | |
171 | */ | |
172 | ||
173 | private Boolean remade(); | |
174 | ||
175 | public start(argv, infile, outfile) | |
176 | String argv[]; | |
177 | String infile, outfile; | |
178 | { | |
179 | String pargv[4]; | |
180 | Node cond; | |
181 | ||
182 | if (coredump) { | |
183 | coredump = false; | |
184 | fclose(corefile); | |
185 | coredump_close(); | |
186 | } | |
187 | if (argv == nil) { | |
188 | argv = pargv; | |
189 | pargv[0] = objname; | |
190 | pargv[1] = nil; | |
191 | } else { | |
192 | argv[argc] = nil; | |
193 | } | |
0022c355 | 194 | pstart(process, argv, infile, outfile); |
9a3bab7a ML |
195 | if (remade(objname)) { |
196 | reinit(argv, infile, outfile); | |
197 | } | |
9a3bab7a | 198 | if (process->status == STOPPED) { |
24350cae | 199 | pc = CODESTART; |
2fd0f574 | 200 | setcurfunc(program); |
9a3bab7a ML |
201 | if (objsize != 0) { |
202 | cond = build(O_EQ, build(O_SYM, pcsym), build(O_LCON, lastaddr())); | |
203 | event_once(cond, buildcmdlist(build(O_ENDX))); | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | /* | |
209 | * Check to see if the object file has changed since the symbolic | |
210 | * information last was read. | |
211 | */ | |
212 | ||
213 | private time_t modtime; | |
214 | ||
215 | private Boolean remade(filename) | |
216 | String filename; | |
217 | { | |
218 | struct stat s; | |
219 | Boolean b; | |
220 | ||
221 | stat(filename, &s); | |
222 | b = (Boolean) (modtime != 0 and modtime < s.st_mtime); | |
223 | modtime = s.st_mtime; | |
224 | return b; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Set up what signals we want to trace. | |
229 | */ | |
230 | ||
231 | private setsigtrace() | |
232 | { | |
233 | register Integer i; | |
234 | register Process p; | |
235 | ||
236 | p = process; | |
237 | for (i = 1; i <= NSIG; i++) { | |
238 | psigtrace(p, i, true); | |
239 | } | |
240 | psigtrace(p, SIGHUP, false); | |
241 | psigtrace(p, SIGKILL, false); | |
242 | psigtrace(p, SIGALRM, false); | |
24350cae DS |
243 | # ifdef SIGTSTP |
244 | psigtrace(p, SIGTSTP, false); | |
245 | psigtrace(p, SIGCONT, false); | |
246 | # endif | |
9a3bab7a | 247 | psigtrace(p, SIGCHLD, false); |
ca6575f0 | 248 | psigtrace(p, SIGWINCH, false); |
9a3bab7a ML |
249 | } |
250 | ||
251 | /* | |
252 | * Initialize the argument list. | |
253 | */ | |
254 | ||
255 | public arginit() | |
256 | { | |
257 | infile = nil; | |
258 | outfile = nil; | |
259 | argv[0] = objname; | |
260 | argc = 1; | |
261 | } | |
262 | ||
263 | /* | |
264 | * Add an argument to the list for the debuggee. | |
265 | */ | |
266 | ||
267 | public newarg(arg) | |
268 | String arg; | |
269 | { | |
270 | if (argc >= MAXNCMDARGS) { | |
271 | error("too many arguments"); | |
272 | } | |
273 | argv[argc++] = arg; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Set the standard input for the debuggee. | |
278 | */ | |
279 | ||
280 | public inarg(filename) | |
281 | String filename; | |
282 | { | |
283 | if (infile != nil) { | |
284 | error("multiple input redirects"); | |
285 | } | |
286 | infile = filename; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Set the standard output for the debuggee. | |
291 | * Probably should check to avoid overwriting an existing file. | |
292 | */ | |
293 | ||
294 | public outarg(filename) | |
295 | String filename; | |
296 | { | |
297 | if (outfile != nil) { | |
298 | error("multiple output redirect"); | |
299 | } | |
300 | outfile = filename; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Start debuggee executing. | |
305 | */ | |
306 | ||
307 | public run() | |
308 | { | |
309 | process->status = STOPPED; | |
310 | fixbps(); | |
311 | curline = 0; | |
312 | start(argv, infile, outfile); | |
313 | just_started = true; | |
314 | isstopped = false; | |
8ee6535a | 315 | cont(0); |
9a3bab7a ML |
316 | } |
317 | ||
318 | /* | |
319 | * Continue execution wherever we left off. | |
320 | * | |
321 | * Note that this routine never returns. Eventually bpact() will fail | |
322 | * and we'll call printstatus or step will call it. | |
323 | */ | |
324 | ||
325 | typedef int Intfunc(); | |
326 | ||
327 | private Intfunc *dbintr; | |
328 | private intr(); | |
329 | ||
36fd36ba | 330 | public cont(signo) |
2fd0f574 | 331 | integer signo; |
9a3bab7a | 332 | { |
2fd0f574 SL |
333 | integer s; |
334 | ||
9a3bab7a ML |
335 | dbintr = signal(SIGINT, intr); |
336 | if (just_started) { | |
337 | just_started = false; | |
338 | } else { | |
339 | if (not isstopped) { | |
340 | error("can't continue execution"); | |
341 | } | |
342 | isstopped = false; | |
36fd36ba | 343 | stepover(); |
9a3bab7a | 344 | } |
2fd0f574 | 345 | s = signo; |
9a3bab7a ML |
346 | for (;;) { |
347 | if (single_stepping) { | |
348 | printnews(); | |
349 | } else { | |
350 | setallbps(); | |
2fd0f574 | 351 | resume(s); |
9a3bab7a | 352 | unsetallbps(); |
2fd0f574 | 353 | s = DEFSIG; |
0022c355 | 354 | if (not isbperr() or not bpact()) { |
9a3bab7a ML |
355 | printstatus(); |
356 | } | |
357 | } | |
36fd36ba | 358 | stepover(); |
9a3bab7a ML |
359 | } |
360 | /* NOTREACHED */ | |
361 | } | |
362 | ||
363 | /* | |
0022c355 | 364 | * This routine is called if we get an interrupt while "running" |
9a3bab7a ML |
365 | * but actually in the debugger. Could happen, for example, while |
366 | * processing breakpoints. | |
367 | * | |
368 | * We basically just want to keep going; the assumption is | |
0022c355 | 369 | * that when the process resumes it will get the interrupt, |
9a3bab7a ML |
370 | * which will then be handled. |
371 | */ | |
372 | ||
373 | private intr() | |
374 | { | |
375 | signal(SIGINT, intr); | |
376 | } | |
377 | ||
378 | public fixintr() | |
379 | { | |
380 | signal(SIGINT, dbintr); | |
381 | } | |
382 | ||
383 | /* | |
384 | * Resume execution. | |
385 | */ | |
386 | ||
36fd36ba ML |
387 | public resume(signo) |
388 | int signo; | |
9a3bab7a ML |
389 | { |
390 | register Process p; | |
391 | ||
392 | p = process; | |
36fd36ba | 393 | pcont(p, signo); |
9a3bab7a | 394 | pc = process->reg[PROGCTR]; |
e0a80343 | 395 | if (p->status != STOPPED) { |
36fd36ba ML |
396 | if (p->signo != 0) { |
397 | error("program terminated by signal %d", p->signo); | |
8ee6535a | 398 | } else if (not runfirst) { |
0022c355 ML |
399 | if (p->exitval == 0) { |
400 | error("program exited"); | |
401 | } else { | |
402 | error("program exited with code %d", p->exitval); | |
403 | } | |
36fd36ba | 404 | } |
e0a80343 | 405 | } |
9a3bab7a ML |
406 | } |
407 | ||
408 | /* | |
409 | * Continue execution up to the next source line. | |
410 | * | |
411 | * There are two ways to define the next source line depending on what | |
412 | * is desired when a procedure or function call is encountered. Step | |
413 | * stops at the beginning of the procedure or call; next skips over it. | |
414 | */ | |
415 | ||
416 | /* | |
417 | * Stepc is what is called when the step command is given. | |
418 | * It has to play with the "isstopped" information. | |
419 | */ | |
420 | ||
421 | public stepc() | |
422 | { | |
423 | if (not isstopped) { | |
424 | error("can't continue execution"); | |
425 | } | |
426 | isstopped = false; | |
427 | dostep(false); | |
428 | isstopped = true; | |
429 | } | |
430 | ||
431 | public next() | |
432 | { | |
2fd0f574 SL |
433 | Address oldfrp, newfrp; |
434 | ||
9a3bab7a ML |
435 | if (not isstopped) { |
436 | error("can't continue execution"); | |
437 | } | |
438 | isstopped = false; | |
2fd0f574 SL |
439 | oldfrp = reg(FRP); |
440 | do { | |
441 | dostep(true); | |
442 | pc = reg(PROGCTR); | |
443 | newfrp = reg(FRP); | |
444 | } while (newfrp < oldfrp and newfrp != 0); | |
9a3bab7a ML |
445 | isstopped = true; |
446 | } | |
447 | ||
2fd0f574 SL |
448 | /* |
449 | * Continue execution until the current function returns, or, | |
450 | * if the given argument is non-nil, until execution returns to | |
451 | * somewhere within the given function. | |
452 | */ | |
453 | ||
454 | public rtnfunc (f) | |
455 | Symbol f; | |
456 | { | |
457 | Address addr; | |
458 | Symbol t; | |
459 | ||
460 | if (not isstopped) { | |
461 | error("can't continue execution"); | |
462 | } else if (f != nil and not isactive(f)) { | |
463 | error("%s is not active", symname(f)); | |
464 | } else { | |
465 | addr = return_addr(); | |
466 | if (addr == nil) { | |
467 | error("no place to return to"); | |
468 | } else { | |
469 | isstopped = false; | |
470 | contto(addr); | |
471 | if (f != nil) { | |
472 | for (;;) { | |
473 | t = whatblock(pc); | |
474 | addr = return_addr(); | |
475 | if (t == f or addr == nil) break; | |
476 | contto(addr); | |
477 | } | |
478 | } | |
0022c355 | 479 | if (not bpact()) { |
2fd0f574 SL |
480 | isstopped = true; |
481 | printstatus(); | |
482 | } | |
483 | } | |
484 | } | |
485 | } | |
486 | ||
36fd36ba ML |
487 | /* |
488 | * Single-step over the current machine instruction. | |
489 | * | |
490 | * If we're single-stepping by source line we want to step to the | |
491 | * next source line. Otherwise we're going to continue so there's | |
492 | * no reason to do all the work necessary to single-step to the next | |
493 | * source line. | |
494 | */ | |
495 | ||
2fd0f574 | 496 | public stepover() |
9a3bab7a | 497 | { |
36fd36ba ML |
498 | Boolean b; |
499 | ||
2fd0f574 SL |
500 | if (traceexec) { |
501 | printf("!! stepping over 0x%x\n", process->reg[PROGCTR]); | |
502 | } | |
36fd36ba ML |
503 | if (single_stepping) { |
504 | dostep(false); | |
505 | } else { | |
506 | b = inst_tracing; | |
507 | inst_tracing = true; | |
508 | dostep(false); | |
509 | inst_tracing = b; | |
510 | } | |
2fd0f574 SL |
511 | if (traceexec) { |
512 | printf("!! stepped over to 0x%x\n", process->reg[PROGCTR]); | |
513 | } | |
9a3bab7a ML |
514 | } |
515 | ||
516 | /* | |
0022c355 ML |
517 | * Resume execution up to the given address. We can either ignore |
518 | * breakpoints (stepto) or catch them (contto). | |
9a3bab7a ML |
519 | */ |
520 | ||
521 | public stepto(addr) | |
522 | Address addr; | |
523 | { | |
2fd0f574 SL |
524 | xto(addr, false); |
525 | } | |
526 | ||
527 | private contto (addr) | |
528 | Address addr; | |
529 | { | |
530 | xto(addr, true); | |
531 | } | |
532 | ||
533 | private xto (addr, catchbps) | |
534 | Address addr; | |
535 | boolean catchbps; | |
536 | { | |
537 | Address curpc; | |
538 | ||
539 | if (catchbps) { | |
540 | stepover(); | |
541 | } | |
542 | curpc = process->reg[PROGCTR]; | |
543 | if (addr != curpc) { | |
544 | if (traceexec) { | |
545 | printf("!! stepping from 0x%x to 0x%x\n", curpc, addr); | |
546 | } | |
547 | if (catchbps) { | |
548 | setallbps(); | |
549 | } | |
550 | setbp(addr); | |
551 | resume(DEFSIG); | |
552 | unsetbp(addr); | |
553 | if (catchbps) { | |
554 | unsetallbps(); | |
555 | } | |
556 | if (not isbperr()) { | |
557 | printstatus(); | |
558 | } | |
9a3bab7a ML |
559 | } |
560 | } | |
561 | ||
562 | /* | |
563 | * Print the status of the process. | |
564 | * This routine does not return. | |
565 | */ | |
566 | ||
24350cae | 567 | public printstatus () |
9a3bab7a | 568 | { |
ca69b757 ML |
569 | int status; |
570 | ||
b0edae1c ML |
571 | if (process->status == FINISHED) { |
572 | exit(0); | |
9a3bab7a | 573 | } else { |
24350cae DS |
574 | if (runfirst) { |
575 | fprintf(stderr, "\nEntering debugger ...\n"); | |
576 | printheading(); | |
577 | init(); | |
578 | } | |
2fd0f574 | 579 | setcurfunc(whatblock(pc)); |
b0edae1c ML |
580 | getsrcpos(); |
581 | if (process->signo == SIGINT) { | |
582 | isstopped = true; | |
583 | printerror(); | |
584 | } else if (isbperr() and isstopped) { | |
585 | printf("stopped "); | |
86d0cc79 ML |
586 | printloc(); |
587 | putchar('\n'); | |
b0edae1c | 588 | if (curline > 0) { |
b0edae1c ML |
589 | printlines(curline, curline); |
590 | } else { | |
b0edae1c ML |
591 | printinst(pc, pc); |
592 | } | |
593 | erecover(); | |
9a3bab7a | 594 | } else { |
b0edae1c | 595 | fixintr(); |
9a3bab7a ML |
596 | isstopped = true; |
597 | printerror(); | |
598 | } | |
599 | } | |
600 | } | |
601 | ||
86d0cc79 ML |
602 | /* |
603 | * Print out the current location in the debuggee. | |
604 | */ | |
605 | ||
606 | public printloc() | |
607 | { | |
608 | printf("in "); | |
609 | printname(stdout, curfunc); | |
610 | putchar(' '); | |
8ee6535a | 611 | if (curline > 0 and not useInstLoc) { |
86d0cc79 ML |
612 | printsrcpos(); |
613 | } else { | |
8ee6535a ML |
614 | useInstLoc = false; |
615 | curline = 0; | |
86d0cc79 ML |
616 | printf("at 0x%x", pc); |
617 | } | |
618 | } | |
619 | ||
9a3bab7a ML |
620 | /* |
621 | * Some functions for testing the state of the process. | |
622 | */ | |
623 | ||
624 | public Boolean notstarted(p) | |
625 | Process p; | |
626 | { | |
627 | return (Boolean) (p->status == NOTSTARTED); | |
628 | } | |
629 | ||
630 | public Boolean isfinished(p) | |
631 | Process p; | |
632 | { | |
633 | return (Boolean) (p->status == FINISHED); | |
634 | } | |
635 | ||
636 | /* | |
0022c355 ML |
637 | * Predicate to test if the reason the process stopped was because |
638 | * of a breakpoint. If so, as a side effect clear the local copy of | |
639 | * signal handler associated with process. We must do this so as to | |
640 | * not confuse future stepping or continuing by possibly concluding | |
641 | * the process should continue with a SIGTRAP handler. | |
9a3bab7a ML |
642 | */ |
643 | ||
0022c355 ML |
644 | public boolean isbperr() |
645 | { | |
646 | Process p; | |
647 | boolean b; | |
648 | ||
649 | p = process; | |
650 | if (p->status == STOPPED and p->signo == SIGTRAP) { | |
651 | b = true; | |
652 | p->sigstatus = 0; | |
653 | } else { | |
654 | b = false; | |
655 | } | |
656 | return b; | |
657 | } | |
658 | ||
659 | /* | |
660 | * Return the signal number that stopped the process. | |
661 | */ | |
662 | ||
663 | public integer errnum (p) | |
9a3bab7a ML |
664 | Process p; |
665 | { | |
666 | return p->signo; | |
667 | } | |
668 | ||
0022c355 ML |
669 | /* |
670 | * Return the signal code associated with the signal. | |
671 | */ | |
672 | ||
673 | public integer errcode (p) | |
57a9bb29 SL |
674 | Process p; |
675 | { | |
676 | return p->sigcode; | |
677 | } | |
678 | ||
9a3bab7a ML |
679 | /* |
680 | * Return the termination code of the process. | |
681 | */ | |
682 | ||
0022c355 | 683 | public integer exitcode (p) |
9a3bab7a ML |
684 | Process p; |
685 | { | |
686 | return p->exitval; | |
687 | } | |
688 | ||
689 | /* | |
690 | * These routines are used to access the debuggee process from | |
691 | * outside this module. | |
692 | * | |
693 | * They invoke "pio" which eventually leads to a call to "ptrace". | |
8ee6535a ML |
694 | * The system generates an I/O error when a ptrace fails. During reads |
695 | * these are ignored, during writes they are reported as an error, and | |
696 | * for anything else they cause a fatal error. | |
9a3bab7a ML |
697 | */ |
698 | ||
699 | extern Intfunc *onsyserr(); | |
700 | ||
701 | private badaddr; | |
8ee6535a | 702 | private read_err(), write_err(); |
9a3bab7a ML |
703 | |
704 | /* | |
705 | * Read from the process' instruction area. | |
706 | */ | |
707 | ||
708 | public iread(buff, addr, nbytes) | |
709 | char *buff; | |
710 | Address addr; | |
711 | int nbytes; | |
712 | { | |
713 | Intfunc *f; | |
714 | ||
8ee6535a | 715 | f = onsyserr(EIO, read_err); |
9a3bab7a ML |
716 | badaddr = addr; |
717 | if (coredump) { | |
718 | coredump_readtext(buff, addr, nbytes); | |
719 | } else { | |
720 | pio(process, PREAD, TEXTSEG, buff, addr, nbytes); | |
721 | } | |
722 | onsyserr(EIO, f); | |
723 | } | |
724 | ||
725 | /* | |
726 | * Write to the process' instruction area, usually in order to set | |
727 | * or unset a breakpoint. | |
728 | */ | |
729 | ||
730 | public iwrite(buff, addr, nbytes) | |
731 | char *buff; | |
732 | Address addr; | |
733 | int nbytes; | |
734 | { | |
735 | Intfunc *f; | |
736 | ||
737 | if (coredump) { | |
738 | error("no process to write to"); | |
739 | } | |
8ee6535a | 740 | f = onsyserr(EIO, write_err); |
9a3bab7a ML |
741 | badaddr = addr; |
742 | pio(process, PWRITE, TEXTSEG, buff, addr, nbytes); | |
743 | onsyserr(EIO, f); | |
744 | } | |
745 | ||
746 | /* | |
747 | * Read for the process' data area. | |
748 | */ | |
749 | ||
750 | public dread(buff, addr, nbytes) | |
751 | char *buff; | |
752 | Address addr; | |
753 | int nbytes; | |
754 | { | |
755 | Intfunc *f; | |
756 | ||
9a3bab7a ML |
757 | badaddr = addr; |
758 | if (coredump) { | |
0022c355 | 759 | f = onsyserr(EFAULT, read_err); |
9a3bab7a | 760 | coredump_readdata(buff, addr, nbytes); |
0022c355 | 761 | onsyserr(EFAULT, f); |
9a3bab7a | 762 | } else { |
0022c355 | 763 | f = onsyserr(EIO, read_err); |
9a3bab7a | 764 | pio(process, PREAD, DATASEG, buff, addr, nbytes); |
0022c355 | 765 | onsyserr(EIO, f); |
9a3bab7a | 766 | } |
9a3bab7a ML |
767 | } |
768 | ||
769 | /* | |
770 | * Write to the process' data area. | |
771 | */ | |
772 | ||
773 | public dwrite(buff, addr, nbytes) | |
774 | char *buff; | |
775 | Address addr; | |
776 | int nbytes; | |
777 | { | |
778 | Intfunc *f; | |
779 | ||
780 | if (coredump) { | |
781 | error("no process to write to"); | |
782 | } | |
8ee6535a | 783 | f = onsyserr(EIO, write_err); |
9a3bab7a ML |
784 | badaddr = addr; |
785 | pio(process, PWRITE, DATASEG, buff, addr, nbytes); | |
786 | onsyserr(EIO, f); | |
787 | } | |
788 | ||
789 | /* | |
8ee6535a ML |
790 | * Trap for errors in reading or writing to a process. |
791 | * The current approach is to "ignore" read errors and complain | |
792 | * bitterly about write errors. | |
9a3bab7a ML |
793 | */ |
794 | ||
8ee6535a | 795 | private read_err() |
9a3bab7a | 796 | { |
ae743e15 | 797 | /* |
8ee6535a | 798 | * Ignore. |
ae743e15 | 799 | */ |
9a3bab7a ML |
800 | } |
801 | ||
8ee6535a ML |
802 | private write_err() |
803 | { | |
804 | error("can't write to process (address 0x%x)", badaddr); | |
805 | } | |
806 | ||
9a3bab7a ML |
807 | /* |
808 | * Ptrace interface. | |
809 | */ | |
810 | ||
9a3bab7a | 811 | #define WMASK (~(sizeof(Word) - 1)) |
24350cae | 812 | #define cachehash(addr) ((unsigned) ((addr >> 2) % CACHESIZE)) |
9a3bab7a ML |
813 | |
814 | #define FIRSTSIG SIGINT | |
815 | #define LASTSIG SIGQUIT | |
816 | #define ischild(pid) ((pid) == 0) | |
0022c355 | 817 | #define traceme() ptrace(0, 0, 0, 0) |
9a3bab7a ML |
818 | #define setrep(n) (1 << ((n)-1)) |
819 | #define istraced(p) (p->sigset&setrep(p->signo)) | |
820 | ||
0022c355 ML |
821 | /* |
822 | * Ptrace options (specified in first argument). | |
823 | */ | |
824 | ||
825 | #define UREAD 3 /* read from process's user structure */ | |
826 | #define UWRITE 6 /* write to process's user structure */ | |
827 | #define IREAD 1 /* read from process's instruction space */ | |
828 | #define IWRITE 4 /* write to process's instruction space */ | |
829 | #define DREAD 2 /* read from process's data space */ | |
830 | #define DWRITE 5 /* write to process's data space */ | |
831 | #define CONT 7 /* continue stopped process */ | |
832 | #define SSTEP 9 /* continue for approximately one instruction */ | |
833 | #define PKILL 8 /* terminate the process */ | |
834 | ||
24350cae DS |
835 | #ifdef IRIS |
836 | # define readreg(p, r) ptrace(10, p->pid, r, 0) | |
837 | # define writereg(p, r, v) ptrace(11, p->pid, r, v) | |
838 | #else | |
839 | # define readreg(p, r) ptrace(UREAD, p->pid, regloc(r), 0); | |
840 | # define writereg(p, r, v) ptrace(UWRITE, p->pid, regloc(r), v); | |
841 | #endif | |
842 | ||
9a3bab7a ML |
843 | /* |
844 | * Start up a new process by forking and exec-ing the | |
845 | * given argument list, returning when the process is loaded | |
846 | * and ready to execute. The PROCESS information (pointed to | |
847 | * by the first argument) is appropriately filled. | |
848 | * | |
849 | * If the given PROCESS structure is associated with an already running | |
850 | * process, we terminate it. | |
851 | */ | |
852 | ||
853 | /* VARARGS2 */ | |
854 | private pstart(p, argv, infile, outfile) | |
855 | Process p; | |
856 | String argv[]; | |
857 | String infile; | |
858 | String outfile; | |
859 | { | |
860 | int status; | |
9a3bab7a | 861 | |
2fd0f574 SL |
862 | if (p->pid != 0) { |
863 | pterm(p); | |
0022c355 | 864 | cacheflush(p); |
9a3bab7a | 865 | } |
0022c355 | 866 | fflush(stdout); |
9a3bab7a | 867 | psigtrace(p, SIGTRAP, true); |
24350cae DS |
868 | # ifdef IRIS |
869 | p->pid = fork(); | |
870 | # else | |
871 | p->pid = vfork(); | |
872 | # endif | |
ca69b757 | 873 | if (p->pid == -1) { |
9a3bab7a ML |
874 | panic("can't fork"); |
875 | } | |
876 | if (ischild(p->pid)) { | |
0022c355 | 877 | nocatcherrs(); |
9a3bab7a ML |
878 | traceme(); |
879 | if (infile != nil) { | |
2fd0f574 | 880 | infrom(infile); |
9a3bab7a ML |
881 | } |
882 | if (outfile != nil) { | |
2fd0f574 | 883 | outto(outfile); |
9a3bab7a | 884 | } |
e0a80343 | 885 | execv(argv[0], argv); |
86d0cc79 | 886 | _exit(1); |
9a3bab7a ML |
887 | } |
888 | pwait(p->pid, &status); | |
889 | getinfo(p, status); | |
890 | if (p->status != STOPPED) { | |
0022c355 ML |
891 | beginerrmsg(); |
892 | fprintf(stderr, "warning: cannot execute %s\n", argv[0]); | |
893 | } else { | |
894 | ptraced(p->pid); | |
9a3bab7a ML |
895 | } |
896 | } | |
897 | ||
2fd0f574 SL |
898 | /* |
899 | * Terminate a ptrace'd process. | |
900 | */ | |
901 | ||
902 | public pterm (p) | |
903 | Process p; | |
904 | { | |
905 | integer status; | |
906 | ||
907 | if (p != nil and p->pid != 0) { | |
0022c355 | 908 | ptrace(PKILL, p->pid, 0, 0); |
2fd0f574 SL |
909 | pwait(p->pid, &status); |
910 | unptraced(p->pid); | |
911 | } | |
912 | } | |
913 | ||
9a3bab7a | 914 | /* |
36fd36ba ML |
915 | * Continue a stopped process. The first argument points to a Process |
916 | * structure. Before the process is restarted it's user area is modified | |
917 | * according to the values in the structure. When this routine finishes, | |
9a3bab7a ML |
918 | * the structure has the new values from the process's user area. |
919 | * | |
920 | * Pcont terminates when the process stops with a signal pending that | |
921 | * is being traced (via psigtrace), or when the process terminates. | |
922 | */ | |
923 | ||
36fd36ba | 924 | private pcont(p, signo) |
9a3bab7a | 925 | Process p; |
36fd36ba | 926 | int signo; |
9a3bab7a | 927 | { |
2fd0f574 | 928 | int s, status; |
9a3bab7a ML |
929 | |
930 | if (p->pid == 0) { | |
0022c355 | 931 | error("program is not active"); |
9a3bab7a | 932 | } |
2fd0f574 | 933 | s = signo; |
9a3bab7a | 934 | do { |
2fd0f574 SL |
935 | setinfo(p, s); |
936 | if (traceexec) { | |
937 | printf("!! pcont from 0x%x with signal %d (%d)\n", | |
938 | p->reg[PROGCTR], s, p->signo); | |
939 | fflush(stdout); | |
940 | } | |
9a3bab7a | 941 | sigs_off(); |
0022c355 | 942 | if (ptrace(CONT, p->pid, p->reg[PROGCTR], p->signo) < 0) { |
ca69b757 | 943 | panic("error %d trying to continue process", errno); |
9a3bab7a ML |
944 | } |
945 | pwait(p->pid, &status); | |
946 | sigs_on(); | |
947 | getinfo(p, status); | |
0022c355 ML |
948 | if (p->status == STOPPED and traceexec and not istraced(p)) { |
949 | printf("!! ignored signal %d at 0x%x\n", | |
950 | p->signo, p->reg[PROGCTR]); | |
2fd0f574 SL |
951 | fflush(stdout); |
952 | } | |
953 | s = p->signo; | |
9a3bab7a | 954 | } while (p->status == STOPPED and not istraced(p)); |
2fd0f574 SL |
955 | if (traceexec) { |
956 | printf("!! pcont to 0x%x on signal %d\n", p->reg[PROGCTR], p->signo); | |
957 | fflush(stdout); | |
958 | } | |
9a3bab7a ML |
959 | } |
960 | ||
961 | /* | |
962 | * Single step as best ptrace can. | |
963 | */ | |
964 | ||
2fd0f574 | 965 | public pstep(p, signo) |
9a3bab7a | 966 | Process p; |
2fd0f574 | 967 | integer signo; |
9a3bab7a | 968 | { |
0022c355 | 969 | int s, status; |
9a3bab7a | 970 | |
0022c355 ML |
971 | s = signo; |
972 | do { | |
973 | setinfo(p, s); | |
974 | if (traceexec) { | |
975 | printf("!! pstep from 0x%x with signal %d (%d)\n", | |
976 | p->reg[PROGCTR], s, p->signo); | |
977 | fflush(stdout); | |
978 | } | |
979 | sigs_off(); | |
980 | if (ptrace(SSTEP, p->pid, p->reg[PROGCTR], p->signo) < 0) { | |
981 | panic("error %d trying to step process", errno); | |
982 | } | |
983 | pwait(p->pid, &status); | |
984 | sigs_on(); | |
985 | getinfo(p, status); | |
24350cae DS |
986 | # if mc68000 || m68000 |
987 | if (p->status == STOPPED and p->signo == SIGTRAP) { | |
988 | p->reg[PROGCTR] += 2; | |
989 | } | |
990 | # endif | |
0022c355 ML |
991 | if (p->status == STOPPED and traceexec and not istraced(p)) { |
992 | printf("!! pstep ignored signal %d at 0x%x\n", | |
993 | p->signo, p->reg[PROGCTR]); | |
994 | fflush(stdout); | |
995 | } | |
996 | s = p->signo; | |
997 | } while (p->status == STOPPED and not istraced(p)); | |
2fd0f574 | 998 | if (traceexec) { |
0022c355 ML |
999 | printf("!! pstep to 0x%x on signal %d\n", |
1000 | p->reg[PROGCTR], p->signo); | |
2fd0f574 SL |
1001 | fflush(stdout); |
1002 | } | |
1003 | if (p->status != STOPPED) { | |
0022c355 ML |
1004 | if (p->exitval == 0) { |
1005 | error("program exited\n"); | |
1006 | } else { | |
1007 | error("program exited with code %d\n", p->exitval); | |
1008 | } | |
2fd0f574 | 1009 | } |
9a3bab7a ML |
1010 | } |
1011 | ||
1012 | /* | |
1013 | * Return from execution when the given signal is pending. | |
1014 | */ | |
1015 | ||
1016 | public psigtrace(p, sig, sw) | |
1017 | Process p; | |
1018 | int sig; | |
1019 | Boolean sw; | |
1020 | { | |
1021 | if (sw) { | |
1022 | p->sigset |= setrep(sig); | |
1023 | } else { | |
1024 | p->sigset &= ~setrep(sig); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Don't catch any signals. | |
1030 | * Particularly useful when letting a process finish uninhibited. | |
1031 | */ | |
1032 | ||
1033 | public unsetsigtraces(p) | |
1034 | Process p; | |
1035 | { | |
1036 | p->sigset = 0; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Turn off attention to signals not being caught. | |
1041 | */ | |
1042 | ||
1043 | private Intfunc *sigfunc[NSIG]; | |
1044 | ||
1045 | private sigs_off() | |
1046 | { | |
1047 | register int i; | |
1048 | ||
1049 | for (i = FIRSTSIG; i < LASTSIG; i++) { | |
1050 | if (i != SIGKILL) { | |
1051 | sigfunc[i] = signal(i, SIG_IGN); | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Turn back on attention to signals. | |
1058 | */ | |
1059 | ||
1060 | private sigs_on() | |
1061 | { | |
1062 | register int i; | |
1063 | ||
1064 | for (i = FIRSTSIG; i < LASTSIG; i++) { | |
1065 | if (i != SIGKILL) { | |
1066 | signal(i, sigfunc[i]); | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /* | |
1072 | * Get process information from user area. | |
1073 | */ | |
1074 | ||
24350cae | 1075 | private getinfo (p, status) |
9a3bab7a ML |
1076 | register Process p; |
1077 | register int status; | |
1078 | { | |
1079 | register int i; | |
2fd0f574 | 1080 | Address addr; |
9a3bab7a ML |
1081 | |
1082 | p->signo = (status&0177); | |
1083 | p->exitval = ((status >> 8)&0377); | |
1084 | if (p->signo != STOPPED) { | |
1085 | p->status = FINISHED; | |
8ee6535a | 1086 | p->pid = 0; |
2fd0f574 | 1087 | p->reg[PROGCTR] = 0; |
9a3bab7a ML |
1088 | } else { |
1089 | p->status = p->signo; | |
1090 | p->signo = p->exitval; | |
1091 | p->exitval = 0; | |
24350cae DS |
1092 | # ifdef IRIS |
1093 | p->mask = readreg(p, RPS); | |
1094 | # else | |
1095 | p->sigcode = ptrace(UREAD, p->pid, &((struct user *)0)->u_code, 0); | |
1096 | p->mask = readreg(p, PS); | |
1097 | # endif | |
9a3bab7a | 1098 | for (i = 0; i < NREG; i++) { |
24350cae | 1099 | p->reg[i] = readreg(p, rloc[i]); |
9a3bab7a ML |
1100 | p->oreg[i] = p->reg[i]; |
1101 | } | |
24350cae DS |
1102 | # ifdef mc68000 |
1103 | if (p->status == STOPPED and p->signo == SIGTRAP and | |
1104 | p->reg[PROGCTR] > CODESTART | |
1105 | ) { | |
1106 | p->reg[PROGCTR] -= 2; | |
1107 | } | |
1108 | # endif | |
5870175c | 1109 | savetty(stdout, &(p->ttyinfo)); |
2fd0f574 | 1110 | addr = (Address) &(((struct user *) 0)->u_signal[p->signo]); |
0022c355 | 1111 | p->sigstatus = (Address) ptrace(UREAD, p->pid, addr, 0); |
9a3bab7a ML |
1112 | } |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Set process's user area information from given process structure. | |
1117 | */ | |
1118 | ||
24350cae | 1119 | private setinfo (p, signo) |
9a3bab7a | 1120 | register Process p; |
36fd36ba | 1121 | int signo; |
9a3bab7a ML |
1122 | { |
1123 | register int i; | |
1124 | register int r; | |
1125 | ||
8ee6535a | 1126 | if (signo == DEFSIG) { |
2fd0f574 | 1127 | if (istraced(p) and (p->sigstatus == 0 or p->sigstatus == 1)) { |
8ee6535a ML |
1128 | p->signo = 0; |
1129 | } | |
1130 | } else { | |
36fd36ba | 1131 | p->signo = signo; |
9a3bab7a ML |
1132 | } |
1133 | for (i = 0; i < NREG; i++) { | |
1134 | if ((r = p->reg[i]) != p->oreg[i]) { | |
24350cae | 1135 | writereg(p, rloc[i], r); |
9a3bab7a ML |
1136 | } |
1137 | } | |
5870175c | 1138 | restoretty(stdout, &(p->ttyinfo)); |
9a3bab7a ML |
1139 | } |
1140 | ||
2fd0f574 SL |
1141 | /* |
1142 | * Return the address associated with the current signal. | |
1143 | * (Plus two since the address points to the beginning of a procedure). | |
1144 | */ | |
1145 | ||
1146 | public Address usignal (p) | |
1147 | Process p; | |
1148 | { | |
1149 | Address r; | |
1150 | ||
1151 | r = p->sigstatus; | |
1152 | if (r != 0 and r != 1) { | |
24350cae | 1153 | r += FUNCOFFSET; |
2fd0f574 SL |
1154 | } |
1155 | return r; | |
1156 | } | |
1157 | ||
9a3bab7a ML |
1158 | /* |
1159 | * Structure for reading and writing by words, but dealing with bytes. | |
1160 | */ | |
1161 | ||
1162 | typedef union { | |
1163 | Word pword; | |
1164 | Byte pbyte[sizeof(Word)]; | |
1165 | } Pword; | |
1166 | ||
1167 | /* | |
1168 | * Read (write) from (to) the process' address space. | |
1169 | * We must deal with ptrace's inability to look anywhere other | |
1170 | * than at a word boundary. | |
1171 | */ | |
1172 | ||
1173 | private Word fetch(); | |
1174 | private store(); | |
1175 | ||
1176 | private pio(p, op, seg, buff, addr, nbytes) | |
1177 | Process p; | |
1178 | PioOp op; | |
1179 | PioSeg seg; | |
1180 | char *buff; | |
1181 | Address addr; | |
1182 | int nbytes; | |
1183 | { | |
1184 | register int i; | |
1185 | register Address newaddr; | |
1186 | register char *cp; | |
1187 | char *bufend; | |
1188 | Pword w; | |
1189 | Address wordaddr; | |
1190 | int byteoff; | |
1191 | ||
1192 | if (p->status != STOPPED) { | |
1193 | error("program is not active"); | |
1194 | } | |
1195 | cp = buff; | |
1196 | newaddr = addr; | |
1197 | wordaddr = (newaddr&WMASK); | |
1198 | if (wordaddr != newaddr) { | |
1199 | w.pword = fetch(p, seg, wordaddr); | |
1200 | for (i = newaddr - wordaddr; i < sizeof(Word) and nbytes > 0; i++) { | |
1201 | if (op == PREAD) { | |
1202 | *cp++ = w.pbyte[i]; | |
1203 | } else { | |
1204 | w.pbyte[i] = *cp++; | |
1205 | } | |
1206 | nbytes--; | |
1207 | } | |
1208 | if (op == PWRITE) { | |
1209 | store(p, seg, wordaddr, w.pword); | |
1210 | } | |
1211 | newaddr = wordaddr + sizeof(Word); | |
1212 | } | |
1213 | byteoff = (nbytes&(~WMASK)); | |
1214 | nbytes -= byteoff; | |
1215 | bufend = cp + nbytes; | |
ca6575f0 SL |
1216 | #ifdef tahoe |
1217 | if (((int)cp)&WMASK) { | |
1218 | /* | |
1219 | * Must copy a byte at a time, buffer not word addressable. | |
1220 | */ | |
1221 | while (cp < bufend) { | |
1222 | if (op == PREAD) { | |
1223 | w.pword = fetch(p, seg, newaddr); | |
1224 | for (i = 0; i < sizeof(Word); i++) | |
1225 | *cp++ = w.pbyte[i]; | |
1226 | } else { | |
1227 | for (i = 0; i < sizeof(Word); i++) | |
1228 | w.pbyte[i] = *cp++; | |
1229 | store(p, seg, newaddr, w.pword); | |
1230 | } | |
1231 | newaddr += sizeof(Word); | |
1232 | } | |
1233 | } else { | |
1234 | /* | |
1235 | * Buffer, word aligned, act normally... | |
1236 | */ | |
1237 | #endif | |
9a3bab7a ML |
1238 | while (cp < bufend) { |
1239 | if (op == PREAD) { | |
1240 | *((Word *) cp) = fetch(p, seg, newaddr); | |
1241 | } else { | |
1242 | store(p, seg, newaddr, *((Word *) cp)); | |
1243 | } | |
1244 | cp += sizeof(Word); | |
1245 | newaddr += sizeof(Word); | |
1246 | } | |
ca6575f0 SL |
1247 | #ifdef tahoe |
1248 | } | |
1249 | #endif | |
9a3bab7a ML |
1250 | if (byteoff > 0) { |
1251 | w.pword = fetch(p, seg, newaddr); | |
1252 | for (i = 0; i < byteoff; i++) { | |
1253 | if (op == PREAD) { | |
1254 | *cp++ = w.pbyte[i]; | |
1255 | } else { | |
1256 | w.pbyte[i] = *cp++; | |
1257 | } | |
1258 | } | |
1259 | if (op == PWRITE) { | |
1260 | store(p, seg, newaddr, w.pword); | |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Get a word from a process at the given address. | |
1267 | * The address is assumed to be on a word boundary. | |
1268 | * | |
1269 | * A simple cache scheme is used to avoid redundant ptrace calls | |
1270 | * to the instruction space since it is assumed to be pure. | |
1271 | * | |
1272 | * It is necessary to use a write-through scheme so that | |
1273 | * breakpoints right next to each other don't interfere. | |
1274 | */ | |
1275 | ||
1276 | private Integer nfetchs, nreads, nwrites; | |
1277 | ||
1278 | private Word fetch(p, seg, addr) | |
1279 | Process p; | |
1280 | PioSeg seg; | |
1281 | register int addr; | |
1282 | { | |
1283 | register CacheWord *wp; | |
1284 | register Word w; | |
1285 | ||
1286 | switch (seg) { | |
1287 | case TEXTSEG: | |
1288 | ++nfetchs; | |
1289 | wp = &p->word[cachehash(addr)]; | |
1290 | if (addr == 0 or wp->addr != addr) { | |
1291 | ++nreads; | |
0022c355 | 1292 | w = ptrace(IREAD, p->pid, addr, 0); |
9a3bab7a ML |
1293 | wp->addr = addr; |
1294 | wp->val = w; | |
1295 | } else { | |
1296 | w = wp->val; | |
1297 | } | |
1298 | break; | |
1299 | ||
1300 | case DATASEG: | |
0022c355 | 1301 | w = ptrace(DREAD, p->pid, addr, 0); |
9a3bab7a ML |
1302 | break; |
1303 | ||
1304 | default: | |
1305 | panic("fetch: bad seg %d", seg); | |
1306 | /* NOTREACHED */ | |
1307 | } | |
1308 | return w; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * Put a word into the process' address space at the given address. | |
1313 | * The address is assumed to be on a word boundary. | |
1314 | */ | |
1315 | ||
1316 | private store(p, seg, addr, data) | |
1317 | Process p; | |
1318 | PioSeg seg; | |
1319 | int addr; | |
1320 | Word data; | |
1321 | { | |
1322 | register CacheWord *wp; | |
1323 | ||
1324 | switch (seg) { | |
1325 | case TEXTSEG: | |
1326 | ++nwrites; | |
1327 | wp = &p->word[cachehash(addr)]; | |
1328 | wp->addr = addr; | |
1329 | wp->val = data; | |
0022c355 | 1330 | ptrace(IWRITE, p->pid, addr, data); |
9a3bab7a ML |
1331 | break; |
1332 | ||
1333 | case DATASEG: | |
0022c355 | 1334 | ptrace(DWRITE, p->pid, addr, data); |
9a3bab7a ML |
1335 | break; |
1336 | ||
1337 | default: | |
1338 | panic("store: bad seg %d", seg); | |
1339 | /* NOTREACHED */ | |
1340 | } | |
1341 | } | |
1342 | ||
0022c355 ML |
1343 | /* |
1344 | * Flush the instruction cache associated with a process. | |
1345 | */ | |
1346 | ||
1347 | private cacheflush (p) | |
1348 | Process p; | |
1349 | { | |
1350 | bzero(p->word, sizeof(p->word)); | |
1351 | } | |
1352 | ||
9a3bab7a ML |
1353 | public printptraceinfo() |
1354 | { | |
1355 | printf("%d fetchs, %d reads, %d writes\n", nfetchs, nreads, nwrites); | |
1356 | } | |
1357 | ||
1358 | /* | |
2fd0f574 SL |
1359 | * Redirect input. |
1360 | * Assuming this is called from a child, we should be careful to avoid | |
1361 | * (possibly) shared standard I/O buffers. | |
1362 | */ | |
1363 | ||
1364 | private infrom (filename) | |
1365 | String filename; | |
1366 | { | |
1367 | Fileid in; | |
1368 | ||
1369 | in = open(filename, 0); | |
1370 | if (in == -1) { | |
1371 | write(2, "can't read ", 11); | |
1372 | write(2, filename, strlen(filename)); | |
1373 | write(2, "\n", 1); | |
1374 | _exit(1); | |
1375 | } | |
1376 | fswap(0, in); | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * Redirect standard output. | |
1381 | * Same assumptions as for "infrom" above. | |
1382 | */ | |
1383 | ||
1384 | private outto (filename) | |
1385 | String filename; | |
1386 | { | |
1387 | Fileid out; | |
1388 | ||
1389 | out = creat(filename, 0666); | |
1390 | if (out == -1) { | |
1391 | write(2, "can't write ", 12); | |
1392 | write(2, filename, strlen(filename)); | |
1393 | write(2, "\n", 1); | |
1394 | _exit(1); | |
1395 | } | |
1396 | fswap(1, out); | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Swap file numbers, useful for redirecting standard input or output. | |
9a3bab7a ML |
1401 | */ |
1402 | ||
1403 | private fswap(oldfd, newfd) | |
2fd0f574 SL |
1404 | Fileid oldfd; |
1405 | Fileid newfd; | |
9a3bab7a ML |
1406 | { |
1407 | if (oldfd != newfd) { | |
1408 | close(oldfd); | |
1409 | dup(newfd); | |
1410 | close(newfd); | |
1411 | } | |
1412 | } | |
f7adfe8e | 1413 | |
f7adfe8e | 1414 | /* |
0022c355 | 1415 | * Signal name manipulation. |
f7adfe8e | 1416 | */ |
0022c355 ML |
1417 | |
1418 | private String signames[NSIG] = { | |
1419 | 0, | |
1420 | "HUP", "INT", "QUIT", "ILL", "TRAP", | |
1421 | "IOT", "EMT", "FPE", "KILL", "BUS", | |
1422 | "SEGV", "SYS", "PIPE", "ALRM", "TERM", | |
1423 | 0, "STOP", "TSTP", "CONT", "CHLD", | |
1424 | "TTIN", "TTOU", "TINT", "XCPU", "XFSZ", | |
ca6575f0 | 1425 | "VTALRM", "PROF", "WINCH", "USR1", "USR2" |
f7adfe8e SL |
1426 | }; |
1427 | ||
1428 | /* | |
0022c355 ML |
1429 | * Get the signal number associated with a given name. |
1430 | * The name is first translated to upper case if necessary. | |
f7adfe8e | 1431 | */ |
0022c355 ML |
1432 | |
1433 | public integer siglookup (s) | |
f7adfe8e SL |
1434 | String s; |
1435 | { | |
0022c355 ML |
1436 | register char *p, *q; |
1437 | char buf[100]; | |
1438 | integer i; | |
1439 | ||
1440 | p = s; | |
1441 | q = buf; | |
1442 | while (*p != '\0') { | |
1443 | if (*p >= 'a' and *p <= 'z') { | |
1444 | *q = (*p - 'a') + 'A'; | |
1445 | } else { | |
1446 | *q = *p; | |
1447 | } | |
1448 | ++p; | |
1449 | ++q; | |
1450 | } | |
1451 | *q = '\0'; | |
1452 | p = buf; | |
1453 | if (buf[0] == 'S' and buf[1] == 'I' and buf[2] == 'G') { | |
1454 | p += 3; | |
1455 | } | |
1456 | i = 1; | |
1457 | for (;;) { | |
1458 | if (i >= sizeof(signames) div sizeof(signames[0])) { | |
1459 | error("signal \"%s\" unknown", s); | |
1460 | i = 0; | |
1461 | break; | |
1462 | } | |
1463 | if (signames[i] != nil and streq(signames[i], p)) { | |
1464 | break; | |
1465 | } | |
1466 | ++i; | |
1467 | } | |
1468 | return i; | |
f7adfe8e SL |
1469 | } |
1470 | ||
1471 | /* | |
0022c355 ML |
1472 | * Print all signals being ignored by the debugger. |
1473 | * These signals are auotmatically | |
f7adfe8e SL |
1474 | * passed on to the debugged process. |
1475 | */ | |
0022c355 ML |
1476 | |
1477 | public printsigsignored (p) | |
57a9bb29 | 1478 | Process p; |
f7adfe8e | 1479 | { |
57a9bb29 | 1480 | printsigs(~p->sigset); |
f7adfe8e SL |
1481 | } |
1482 | ||
1483 | /* | |
1484 | * Print all signals being intercepted by | |
1485 | * the debugger for the specified process. | |
1486 | */ | |
0022c355 | 1487 | |
57a9bb29 SL |
1488 | public printsigscaught(p) |
1489 | Process p; | |
f7adfe8e | 1490 | { |
57a9bb29 | 1491 | printsigs(p->sigset); |
f7adfe8e SL |
1492 | } |
1493 | ||
0022c355 ML |
1494 | private printsigs (set) |
1495 | integer set; | |
57a9bb29 | 1496 | { |
0022c355 ML |
1497 | integer s; |
1498 | char separator[2]; | |
1499 | ||
1500 | separator[0] = '\0'; | |
1501 | for (s = 1; s < sizeof(signames) div sizeof(signames[0]); s++) { | |
1502 | if (set & setrep(s)) { | |
1503 | if (signames[s] != nil) { | |
1504 | printf("%s%s", separator, signames[s]); | |
1505 | separator[0] = ' '; | |
1506 | separator[1] = '\0'; | |
1507 | } | |
57a9bb29 | 1508 | } |
0022c355 ML |
1509 | } |
1510 | if (separator[0] == ' ') { | |
57a9bb29 | 1511 | putchar('\n'); |
57a9bb29 SL |
1512 | } |
1513 | } |