Commit | Line | Data |
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2a24676e | 1 | /* |
8a90f3aa KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
6ecf3d85 | 5 | * %sccs.include.redist.c% |
2a24676e | 6 | */ |
9a3bab7a | 7 | |
2a24676e | 8 | #ifndef lint |
6ecf3d85 | 9 | static char sccsid[] = "@(#)process.c 5.6 (Berkeley) %G%"; |
8a90f3aa | 10 | #endif /* not lint */ |
9a3bab7a ML |
11 | |
12 | /* | |
13 | * Process management. | |
14 | * | |
15 | * This module contains the routines to manage the execution and | |
16 | * tracing of the debuggee process. | |
17 | */ | |
18 | ||
19 | #include "defs.h" | |
20 | #include "process.h" | |
21 | #include "machine.h" | |
22 | #include "events.h" | |
23 | #include "tree.h" | |
8ee6535a | 24 | #include "eval.h" |
9a3bab7a ML |
25 | #include "operators.h" |
26 | #include "source.h" | |
27 | #include "object.h" | |
28 | #include "mappings.h" | |
29 | #include "main.h" | |
30 | #include "coredump.h" | |
31 | #include <signal.h> | |
32 | #include <errno.h> | |
9a3bab7a ML |
33 | #include <sys/stat.h> |
34 | ||
35 | #ifndef public | |
36 | ||
37 | typedef struct Process *Process; | |
38 | ||
39 | Process process; | |
40 | ||
8ee6535a ML |
41 | #define DEFSIG -1 |
42 | ||
9a3bab7a ML |
43 | #include "machine.h" |
44 | ||
45 | #endif | |
46 | ||
47 | #define NOTSTARTED 1 | |
48 | #define STOPPED 0177 | |
49 | #define FINISHED 0 | |
50 | ||
51 | /* | |
2fd0f574 SL |
52 | * A cache of the instruction segment is kept to reduce the number |
53 | * of system calls. Might be better just to read the entire | |
54 | * code space into memory. | |
9a3bab7a ML |
55 | */ |
56 | ||
24350cae | 57 | #define CACHESIZE 1003 |
9a3bab7a ML |
58 | |
59 | typedef struct { | |
60 | Word addr; | |
61 | Word val; | |
62 | } CacheWord; | |
63 | ||
64 | /* | |
65 | * This structure holds the information we need from the user structure. | |
66 | */ | |
67 | ||
68 | struct Process { | |
69 | int pid; /* process being traced */ | |
5870175c ML |
70 | int mask; /* process status word */ |
71 | Word reg[NREG]; /* process' registers */ | |
9a3bab7a ML |
72 | Word oreg[NREG]; /* registers when process last stopped */ |
73 | short status; /* either STOPPED or FINISHED */ | |
74 | short signo; /* signal that stopped process */ | |
0022c355 | 75 | short sigcode; /* extra signal information */ |
9a3bab7a ML |
76 | int exitval; /* return value from exit() */ |
77 | long sigset; /* bit array of traced signals */ | |
24350cae | 78 | CacheWord word[CACHESIZE]; /* text segment cache */ |
5870175c | 79 | Ttyinfo ttyinfo; /* process' terminal characteristics */ |
2fd0f574 | 80 | Address sigstatus; /* process' handler for current signal */ |
9a3bab7a ML |
81 | }; |
82 | ||
83 | /* | |
84 | * These definitions are for the arguments to "pio". | |
85 | */ | |
86 | ||
87 | typedef enum { PREAD, PWRITE } PioOp; | |
88 | typedef enum { TEXTSEG, DATASEG } PioSeg; | |
89 | ||
90 | private struct Process pbuf; | |
91 | ||
0022c355 | 92 | #define MAXNCMDARGS 1000 /* maximum number of arguments to RUN */ |
9a3bab7a | 93 | |
ca69b757 ML |
94 | extern int errno; |
95 | ||
9a3bab7a ML |
96 | private Boolean just_started; |
97 | private int argc; | |
98 | private String argv[MAXNCMDARGS]; | |
99 | private String infile, outfile; | |
100 | ||
101 | /* | |
102 | * Initialize process information. | |
103 | */ | |
104 | ||
105 | public process_init() | |
106 | { | |
24350cae DS |
107 | register integer i; |
108 | char buf[10]; | |
9a3bab7a ML |
109 | |
110 | process = &pbuf; | |
111 | process->status = (coredump) ? STOPPED : NOTSTARTED; | |
112 | setsigtrace(); | |
24350cae DS |
113 | # if vax || tahoe |
114 | for (i = 0; i < NREG; i++) { | |
115 | sprintf(buf, "$r%d", i); | |
116 | defregname(identname(buf, false), i); | |
117 | } | |
118 | # ifdef vax | |
119 | defregname(identname("$ap", true), ARGP); | |
120 | # endif | |
121 | # else | |
122 | # ifdef mc68000 | |
123 | for (i = 0; i < 8; i++) { | |
124 | sprintf(buf, "$d%d", i); | |
125 | defregname(identname(buf, false), i); | |
126 | sprintf(buf, "$a%d", i); | |
127 | defregname(identname(buf, false), i + 8); | |
128 | } | |
129 | # endif | |
130 | # endif | |
9a3bab7a ML |
131 | defregname(identname("$fp", true), FRP); |
132 | defregname(identname("$sp", true), STKP); | |
133 | defregname(identname("$pc", true), PROGCTR); | |
134 | if (coredump) { | |
135 | coredump_readin(process->mask, process->reg, process->signo); | |
4e067a2c | 136 | pc = process->reg[PROGCTR]; |
9a3bab7a | 137 | } |
4e067a2c | 138 | arginit(); |
9a3bab7a ML |
139 | } |
140 | ||
141 | /* | |
142 | * Routines to get at process information from outside this module. | |
143 | */ | |
144 | ||
145 | public Word reg(n) | |
146 | Integer n; | |
147 | { | |
148 | register Word w; | |
149 | ||
150 | if (n == NREG) { | |
151 | w = process->mask; | |
152 | } else { | |
153 | w = process->reg[n]; | |
154 | } | |
155 | return w; | |
156 | } | |
157 | ||
158 | public setreg(n, w) | |
159 | Integer n; | |
160 | Word w; | |
161 | { | |
162 | process->reg[n] = w; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Begin execution. | |
167 | * | |
168 | * We set a breakpoint at the end of the code so that the | |
169 | * process data doesn't disappear after the program terminates. | |
170 | */ | |
171 | ||
172 | private Boolean remade(); | |
173 | ||
174 | public start(argv, infile, outfile) | |
175 | String argv[]; | |
176 | String infile, outfile; | |
177 | { | |
178 | String pargv[4]; | |
179 | Node cond; | |
180 | ||
181 | if (coredump) { | |
182 | coredump = false; | |
183 | fclose(corefile); | |
184 | coredump_close(); | |
185 | } | |
186 | if (argv == nil) { | |
187 | argv = pargv; | |
188 | pargv[0] = objname; | |
189 | pargv[1] = nil; | |
190 | } else { | |
191 | argv[argc] = nil; | |
192 | } | |
0022c355 | 193 | pstart(process, argv, infile, outfile); |
9a3bab7a ML |
194 | if (remade(objname)) { |
195 | reinit(argv, infile, outfile); | |
196 | } | |
9a3bab7a | 197 | if (process->status == STOPPED) { |
24350cae | 198 | pc = CODESTART; |
2fd0f574 | 199 | setcurfunc(program); |
9a3bab7a ML |
200 | if (objsize != 0) { |
201 | cond = build(O_EQ, build(O_SYM, pcsym), build(O_LCON, lastaddr())); | |
202 | event_once(cond, buildcmdlist(build(O_ENDX))); | |
203 | } | |
204 | } | |
205 | } | |
206 | ||
207 | /* | |
208 | * Check to see if the object file has changed since the symbolic | |
209 | * information last was read. | |
210 | */ | |
211 | ||
212 | private time_t modtime; | |
213 | ||
214 | private Boolean remade(filename) | |
215 | String filename; | |
216 | { | |
217 | struct stat s; | |
218 | Boolean b; | |
219 | ||
220 | stat(filename, &s); | |
221 | b = (Boolean) (modtime != 0 and modtime < s.st_mtime); | |
222 | modtime = s.st_mtime; | |
223 | return b; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Set up what signals we want to trace. | |
228 | */ | |
229 | ||
230 | private setsigtrace() | |
231 | { | |
232 | register Integer i; | |
233 | register Process p; | |
234 | ||
235 | p = process; | |
236 | for (i = 1; i <= NSIG; i++) { | |
237 | psigtrace(p, i, true); | |
238 | } | |
239 | psigtrace(p, SIGHUP, false); | |
240 | psigtrace(p, SIGKILL, false); | |
241 | psigtrace(p, SIGALRM, false); | |
24350cae DS |
242 | # ifdef SIGTSTP |
243 | psigtrace(p, SIGTSTP, false); | |
244 | psigtrace(p, SIGCONT, false); | |
245 | # endif | |
9a3bab7a | 246 | psigtrace(p, SIGCHLD, false); |
ca6575f0 | 247 | psigtrace(p, SIGWINCH, false); |
9a3bab7a ML |
248 | } |
249 | ||
250 | /* | |
251 | * Initialize the argument list. | |
252 | */ | |
253 | ||
254 | public arginit() | |
255 | { | |
256 | infile = nil; | |
257 | outfile = nil; | |
258 | argv[0] = objname; | |
259 | argc = 1; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Add an argument to the list for the debuggee. | |
264 | */ | |
265 | ||
266 | public newarg(arg) | |
267 | String arg; | |
268 | { | |
269 | if (argc >= MAXNCMDARGS) { | |
270 | error("too many arguments"); | |
271 | } | |
272 | argv[argc++] = arg; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Set the standard input for the debuggee. | |
277 | */ | |
278 | ||
279 | public inarg(filename) | |
280 | String filename; | |
281 | { | |
282 | if (infile != nil) { | |
283 | error("multiple input redirects"); | |
284 | } | |
285 | infile = filename; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Set the standard output for the debuggee. | |
290 | * Probably should check to avoid overwriting an existing file. | |
291 | */ | |
292 | ||
293 | public outarg(filename) | |
294 | String filename; | |
295 | { | |
296 | if (outfile != nil) { | |
297 | error("multiple output redirect"); | |
298 | } | |
299 | outfile = filename; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Start debuggee executing. | |
304 | */ | |
305 | ||
306 | public run() | |
307 | { | |
308 | process->status = STOPPED; | |
309 | fixbps(); | |
310 | curline = 0; | |
311 | start(argv, infile, outfile); | |
312 | just_started = true; | |
313 | isstopped = false; | |
8ee6535a | 314 | cont(0); |
9a3bab7a ML |
315 | } |
316 | ||
317 | /* | |
318 | * Continue execution wherever we left off. | |
319 | * | |
320 | * Note that this routine never returns. Eventually bpact() will fail | |
321 | * and we'll call printstatus or step will call it. | |
322 | */ | |
323 | ||
324 | typedef int Intfunc(); | |
325 | ||
392fe950 KB |
326 | private sig_t dbintr; |
327 | private void intr(); | |
9a3bab7a | 328 | |
36fd36ba | 329 | public cont(signo) |
2fd0f574 | 330 | integer signo; |
9a3bab7a | 331 | { |
2fd0f574 SL |
332 | integer s; |
333 | ||
9a3bab7a ML |
334 | dbintr = signal(SIGINT, intr); |
335 | if (just_started) { | |
336 | just_started = false; | |
337 | } else { | |
338 | if (not isstopped) { | |
339 | error("can't continue execution"); | |
340 | } | |
341 | isstopped = false; | |
36fd36ba | 342 | stepover(); |
9a3bab7a | 343 | } |
2fd0f574 | 344 | s = signo; |
9a3bab7a ML |
345 | for (;;) { |
346 | if (single_stepping) { | |
347 | printnews(); | |
348 | } else { | |
349 | setallbps(); | |
2fd0f574 | 350 | resume(s); |
9a3bab7a | 351 | unsetallbps(); |
2fd0f574 | 352 | s = DEFSIG; |
0022c355 | 353 | if (not isbperr() or not bpact()) { |
9a3bab7a ML |
354 | printstatus(); |
355 | } | |
356 | } | |
36fd36ba | 357 | stepover(); |
9a3bab7a ML |
358 | } |
359 | /* NOTREACHED */ | |
360 | } | |
361 | ||
362 | /* | |
0022c355 | 363 | * This routine is called if we get an interrupt while "running" |
9a3bab7a ML |
364 | * but actually in the debugger. Could happen, for example, while |
365 | * processing breakpoints. | |
366 | * | |
367 | * We basically just want to keep going; the assumption is | |
0022c355 | 368 | * that when the process resumes it will get the interrupt, |
9a3bab7a ML |
369 | * which will then be handled. |
370 | */ | |
371 | ||
392fe950 | 372 | private void intr() |
9a3bab7a ML |
373 | { |
374 | signal(SIGINT, intr); | |
375 | } | |
376 | ||
377 | public fixintr() | |
378 | { | |
379 | signal(SIGINT, dbintr); | |
380 | } | |
381 | ||
382 | /* | |
383 | * Resume execution. | |
384 | */ | |
385 | ||
36fd36ba ML |
386 | public resume(signo) |
387 | int signo; | |
9a3bab7a ML |
388 | { |
389 | register Process p; | |
390 | ||
391 | p = process; | |
36fd36ba | 392 | pcont(p, signo); |
9a3bab7a | 393 | pc = process->reg[PROGCTR]; |
e0a80343 | 394 | if (p->status != STOPPED) { |
36fd36ba ML |
395 | if (p->signo != 0) { |
396 | error("program terminated by signal %d", p->signo); | |
8ee6535a | 397 | } else if (not runfirst) { |
0022c355 ML |
398 | if (p->exitval == 0) { |
399 | error("program exited"); | |
400 | } else { | |
401 | error("program exited with code %d", p->exitval); | |
402 | } | |
36fd36ba | 403 | } |
e0a80343 | 404 | } |
9a3bab7a ML |
405 | } |
406 | ||
407 | /* | |
408 | * Continue execution up to the next source line. | |
409 | * | |
410 | * There are two ways to define the next source line depending on what | |
411 | * is desired when a procedure or function call is encountered. Step | |
412 | * stops at the beginning of the procedure or call; next skips over it. | |
413 | */ | |
414 | ||
415 | /* | |
416 | * Stepc is what is called when the step command is given. | |
417 | * It has to play with the "isstopped" information. | |
418 | */ | |
419 | ||
420 | public stepc() | |
421 | { | |
422 | if (not isstopped) { | |
423 | error("can't continue execution"); | |
424 | } | |
425 | isstopped = false; | |
426 | dostep(false); | |
427 | isstopped = true; | |
428 | } | |
429 | ||
430 | public next() | |
431 | { | |
2fd0f574 SL |
432 | Address oldfrp, newfrp; |
433 | ||
9a3bab7a ML |
434 | if (not isstopped) { |
435 | error("can't continue execution"); | |
436 | } | |
437 | isstopped = false; | |
2fd0f574 SL |
438 | oldfrp = reg(FRP); |
439 | do { | |
440 | dostep(true); | |
441 | pc = reg(PROGCTR); | |
442 | newfrp = reg(FRP); | |
443 | } while (newfrp < oldfrp and newfrp != 0); | |
9a3bab7a ML |
444 | isstopped = true; |
445 | } | |
446 | ||
2fd0f574 SL |
447 | /* |
448 | * Continue execution until the current function returns, or, | |
449 | * if the given argument is non-nil, until execution returns to | |
450 | * somewhere within the given function. | |
451 | */ | |
452 | ||
453 | public rtnfunc (f) | |
454 | Symbol f; | |
455 | { | |
456 | Address addr; | |
457 | Symbol t; | |
458 | ||
459 | if (not isstopped) { | |
460 | error("can't continue execution"); | |
461 | } else if (f != nil and not isactive(f)) { | |
462 | error("%s is not active", symname(f)); | |
463 | } else { | |
464 | addr = return_addr(); | |
465 | if (addr == nil) { | |
466 | error("no place to return to"); | |
467 | } else { | |
468 | isstopped = false; | |
469 | contto(addr); | |
470 | if (f != nil) { | |
471 | for (;;) { | |
472 | t = whatblock(pc); | |
473 | addr = return_addr(); | |
474 | if (t == f or addr == nil) break; | |
475 | contto(addr); | |
476 | } | |
477 | } | |
0022c355 | 478 | if (not bpact()) { |
2fd0f574 SL |
479 | isstopped = true; |
480 | printstatus(); | |
481 | } | |
482 | } | |
483 | } | |
484 | } | |
485 | ||
36fd36ba ML |
486 | /* |
487 | * Single-step over the current machine instruction. | |
488 | * | |
489 | * If we're single-stepping by source line we want to step to the | |
490 | * next source line. Otherwise we're going to continue so there's | |
491 | * no reason to do all the work necessary to single-step to the next | |
492 | * source line. | |
493 | */ | |
494 | ||
2fd0f574 | 495 | public stepover() |
9a3bab7a | 496 | { |
36fd36ba ML |
497 | Boolean b; |
498 | ||
2fd0f574 SL |
499 | if (traceexec) { |
500 | printf("!! stepping over 0x%x\n", process->reg[PROGCTR]); | |
501 | } | |
36fd36ba ML |
502 | if (single_stepping) { |
503 | dostep(false); | |
504 | } else { | |
505 | b = inst_tracing; | |
506 | inst_tracing = true; | |
507 | dostep(false); | |
508 | inst_tracing = b; | |
509 | } | |
2fd0f574 SL |
510 | if (traceexec) { |
511 | printf("!! stepped over to 0x%x\n", process->reg[PROGCTR]); | |
512 | } | |
9a3bab7a ML |
513 | } |
514 | ||
515 | /* | |
0022c355 ML |
516 | * Resume execution up to the given address. We can either ignore |
517 | * breakpoints (stepto) or catch them (contto). | |
9a3bab7a ML |
518 | */ |
519 | ||
520 | public stepto(addr) | |
521 | Address addr; | |
522 | { | |
2fd0f574 SL |
523 | xto(addr, false); |
524 | } | |
525 | ||
526 | private contto (addr) | |
527 | Address addr; | |
528 | { | |
529 | xto(addr, true); | |
530 | } | |
531 | ||
532 | private xto (addr, catchbps) | |
533 | Address addr; | |
534 | boolean catchbps; | |
535 | { | |
536 | Address curpc; | |
537 | ||
538 | if (catchbps) { | |
539 | stepover(); | |
540 | } | |
541 | curpc = process->reg[PROGCTR]; | |
542 | if (addr != curpc) { | |
543 | if (traceexec) { | |
544 | printf("!! stepping from 0x%x to 0x%x\n", curpc, addr); | |
545 | } | |
546 | if (catchbps) { | |
547 | setallbps(); | |
548 | } | |
549 | setbp(addr); | |
550 | resume(DEFSIG); | |
551 | unsetbp(addr); | |
552 | if (catchbps) { | |
553 | unsetallbps(); | |
554 | } | |
555 | if (not isbperr()) { | |
556 | printstatus(); | |
557 | } | |
9a3bab7a ML |
558 | } |
559 | } | |
560 | ||
561 | /* | |
562 | * Print the status of the process. | |
563 | * This routine does not return. | |
564 | */ | |
565 | ||
24350cae | 566 | public printstatus () |
9a3bab7a | 567 | { |
ca69b757 ML |
568 | int status; |
569 | ||
b0edae1c ML |
570 | if (process->status == FINISHED) { |
571 | exit(0); | |
9a3bab7a | 572 | } else { |
24350cae DS |
573 | if (runfirst) { |
574 | fprintf(stderr, "\nEntering debugger ...\n"); | |
575 | printheading(); | |
576 | init(); | |
577 | } | |
2fd0f574 | 578 | setcurfunc(whatblock(pc)); |
b0edae1c ML |
579 | getsrcpos(); |
580 | if (process->signo == SIGINT) { | |
581 | isstopped = true; | |
582 | printerror(); | |
583 | } else if (isbperr() and isstopped) { | |
584 | printf("stopped "); | |
86d0cc79 ML |
585 | printloc(); |
586 | putchar('\n'); | |
b0edae1c | 587 | if (curline > 0) { |
b0edae1c ML |
588 | printlines(curline, curline); |
589 | } else { | |
b0edae1c ML |
590 | printinst(pc, pc); |
591 | } | |
592 | erecover(); | |
9a3bab7a | 593 | } else { |
b0edae1c | 594 | fixintr(); |
9a3bab7a ML |
595 | isstopped = true; |
596 | printerror(); | |
597 | } | |
598 | } | |
599 | } | |
600 | ||
86d0cc79 ML |
601 | /* |
602 | * Print out the current location in the debuggee. | |
603 | */ | |
604 | ||
605 | public printloc() | |
606 | { | |
607 | printf("in "); | |
608 | printname(stdout, curfunc); | |
609 | putchar(' '); | |
8ee6535a | 610 | if (curline > 0 and not useInstLoc) { |
86d0cc79 ML |
611 | printsrcpos(); |
612 | } else { | |
8ee6535a ML |
613 | useInstLoc = false; |
614 | curline = 0; | |
86d0cc79 ML |
615 | printf("at 0x%x", pc); |
616 | } | |
617 | } | |
618 | ||
9a3bab7a ML |
619 | /* |
620 | * Some functions for testing the state of the process. | |
621 | */ | |
622 | ||
623 | public Boolean notstarted(p) | |
624 | Process p; | |
625 | { | |
626 | return (Boolean) (p->status == NOTSTARTED); | |
627 | } | |
628 | ||
629 | public Boolean isfinished(p) | |
630 | Process p; | |
631 | { | |
632 | return (Boolean) (p->status == FINISHED); | |
633 | } | |
634 | ||
635 | /* | |
0022c355 ML |
636 | * Predicate to test if the reason the process stopped was because |
637 | * of a breakpoint. If so, as a side effect clear the local copy of | |
638 | * signal handler associated with process. We must do this so as to | |
639 | * not confuse future stepping or continuing by possibly concluding | |
640 | * the process should continue with a SIGTRAP handler. | |
9a3bab7a ML |
641 | */ |
642 | ||
0022c355 ML |
643 | public boolean isbperr() |
644 | { | |
645 | Process p; | |
646 | boolean b; | |
647 | ||
648 | p = process; | |
649 | if (p->status == STOPPED and p->signo == SIGTRAP) { | |
650 | b = true; | |
651 | p->sigstatus = 0; | |
652 | } else { | |
653 | b = false; | |
654 | } | |
655 | return b; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Return the signal number that stopped the process. | |
660 | */ | |
661 | ||
662 | public integer errnum (p) | |
9a3bab7a ML |
663 | Process p; |
664 | { | |
665 | return p->signo; | |
666 | } | |
667 | ||
0022c355 ML |
668 | /* |
669 | * Return the signal code associated with the signal. | |
670 | */ | |
671 | ||
672 | public integer errcode (p) | |
57a9bb29 SL |
673 | Process p; |
674 | { | |
675 | return p->sigcode; | |
676 | } | |
677 | ||
9a3bab7a ML |
678 | /* |
679 | * Return the termination code of the process. | |
680 | */ | |
681 | ||
0022c355 | 682 | public integer exitcode (p) |
9a3bab7a ML |
683 | Process p; |
684 | { | |
685 | return p->exitval; | |
686 | } | |
687 | ||
688 | /* | |
689 | * These routines are used to access the debuggee process from | |
690 | * outside this module. | |
691 | * | |
692 | * They invoke "pio" which eventually leads to a call to "ptrace". | |
8ee6535a ML |
693 | * The system generates an I/O error when a ptrace fails. During reads |
694 | * these are ignored, during writes they are reported as an error, and | |
695 | * for anything else they cause a fatal error. | |
9a3bab7a ML |
696 | */ |
697 | ||
698 | extern Intfunc *onsyserr(); | |
699 | ||
700 | private badaddr; | |
8ee6535a | 701 | private read_err(), write_err(); |
9a3bab7a ML |
702 | |
703 | /* | |
704 | * Read from the process' instruction area. | |
705 | */ | |
706 | ||
707 | public iread(buff, addr, nbytes) | |
708 | char *buff; | |
709 | Address addr; | |
710 | int nbytes; | |
711 | { | |
712 | Intfunc *f; | |
713 | ||
8ee6535a | 714 | f = onsyserr(EIO, read_err); |
9a3bab7a ML |
715 | badaddr = addr; |
716 | if (coredump) { | |
717 | coredump_readtext(buff, addr, nbytes); | |
718 | } else { | |
719 | pio(process, PREAD, TEXTSEG, buff, addr, nbytes); | |
720 | } | |
721 | onsyserr(EIO, f); | |
722 | } | |
723 | ||
724 | /* | |
725 | * Write to the process' instruction area, usually in order to set | |
726 | * or unset a breakpoint. | |
727 | */ | |
728 | ||
729 | public iwrite(buff, addr, nbytes) | |
730 | char *buff; | |
731 | Address addr; | |
732 | int nbytes; | |
733 | { | |
734 | Intfunc *f; | |
735 | ||
736 | if (coredump) { | |
737 | error("no process to write to"); | |
738 | } | |
8ee6535a | 739 | f = onsyserr(EIO, write_err); |
9a3bab7a ML |
740 | badaddr = addr; |
741 | pio(process, PWRITE, TEXTSEG, buff, addr, nbytes); | |
742 | onsyserr(EIO, f); | |
743 | } | |
744 | ||
745 | /* | |
746 | * Read for the process' data area. | |
747 | */ | |
748 | ||
749 | public dread(buff, addr, nbytes) | |
750 | char *buff; | |
751 | Address addr; | |
752 | int nbytes; | |
753 | { | |
754 | Intfunc *f; | |
755 | ||
9a3bab7a ML |
756 | badaddr = addr; |
757 | if (coredump) { | |
0022c355 | 758 | f = onsyserr(EFAULT, read_err); |
9a3bab7a | 759 | coredump_readdata(buff, addr, nbytes); |
0022c355 | 760 | onsyserr(EFAULT, f); |
9a3bab7a | 761 | } else { |
0022c355 | 762 | f = onsyserr(EIO, read_err); |
9a3bab7a | 763 | pio(process, PREAD, DATASEG, buff, addr, nbytes); |
0022c355 | 764 | onsyserr(EIO, f); |
9a3bab7a | 765 | } |
9a3bab7a ML |
766 | } |
767 | ||
768 | /* | |
769 | * Write to the process' data area. | |
770 | */ | |
771 | ||
772 | public dwrite(buff, addr, nbytes) | |
773 | char *buff; | |
774 | Address addr; | |
775 | int nbytes; | |
776 | { | |
777 | Intfunc *f; | |
778 | ||
779 | if (coredump) { | |
780 | error("no process to write to"); | |
781 | } | |
8ee6535a | 782 | f = onsyserr(EIO, write_err); |
9a3bab7a ML |
783 | badaddr = addr; |
784 | pio(process, PWRITE, DATASEG, buff, addr, nbytes); | |
785 | onsyserr(EIO, f); | |
786 | } | |
787 | ||
788 | /* | |
8ee6535a ML |
789 | * Trap for errors in reading or writing to a process. |
790 | * The current approach is to "ignore" read errors and complain | |
791 | * bitterly about write errors. | |
9a3bab7a ML |
792 | */ |
793 | ||
8ee6535a | 794 | private read_err() |
9a3bab7a | 795 | { |
ae743e15 | 796 | /* |
8ee6535a | 797 | * Ignore. |
ae743e15 | 798 | */ |
9a3bab7a ML |
799 | } |
800 | ||
8ee6535a ML |
801 | private write_err() |
802 | { | |
803 | error("can't write to process (address 0x%x)", badaddr); | |
804 | } | |
805 | ||
9a3bab7a ML |
806 | /* |
807 | * Ptrace interface. | |
808 | */ | |
809 | ||
9a3bab7a | 810 | #define WMASK (~(sizeof(Word) - 1)) |
24350cae | 811 | #define cachehash(addr) ((unsigned) ((addr >> 2) % CACHESIZE)) |
9a3bab7a ML |
812 | |
813 | #define FIRSTSIG SIGINT | |
814 | #define LASTSIG SIGQUIT | |
815 | #define ischild(pid) ((pid) == 0) | |
0022c355 | 816 | #define traceme() ptrace(0, 0, 0, 0) |
9a3bab7a ML |
817 | #define setrep(n) (1 << ((n)-1)) |
818 | #define istraced(p) (p->sigset&setrep(p->signo)) | |
819 | ||
0022c355 ML |
820 | /* |
821 | * Ptrace options (specified in first argument). | |
822 | */ | |
823 | ||
824 | #define UREAD 3 /* read from process's user structure */ | |
825 | #define UWRITE 6 /* write to process's user structure */ | |
826 | #define IREAD 1 /* read from process's instruction space */ | |
827 | #define IWRITE 4 /* write to process's instruction space */ | |
828 | #define DREAD 2 /* read from process's data space */ | |
829 | #define DWRITE 5 /* write to process's data space */ | |
830 | #define CONT 7 /* continue stopped process */ | |
831 | #define SSTEP 9 /* continue for approximately one instruction */ | |
832 | #define PKILL 8 /* terminate the process */ | |
833 | ||
24350cae DS |
834 | #ifdef IRIS |
835 | # define readreg(p, r) ptrace(10, p->pid, r, 0) | |
836 | # define writereg(p, r, v) ptrace(11, p->pid, r, v) | |
837 | #else | |
838 | # define readreg(p, r) ptrace(UREAD, p->pid, regloc(r), 0); | |
839 | # define writereg(p, r, v) ptrace(UWRITE, p->pid, regloc(r), v); | |
840 | #endif | |
841 | ||
9a3bab7a ML |
842 | /* |
843 | * Start up a new process by forking and exec-ing the | |
844 | * given argument list, returning when the process is loaded | |
845 | * and ready to execute. The PROCESS information (pointed to | |
846 | * by the first argument) is appropriately filled. | |
847 | * | |
848 | * If the given PROCESS structure is associated with an already running | |
849 | * process, we terminate it. | |
850 | */ | |
851 | ||
852 | /* VARARGS2 */ | |
853 | private pstart(p, argv, infile, outfile) | |
854 | Process p; | |
855 | String argv[]; | |
856 | String infile; | |
857 | String outfile; | |
858 | { | |
859 | int status; | |
9a3bab7a | 860 | |
2fd0f574 SL |
861 | if (p->pid != 0) { |
862 | pterm(p); | |
0022c355 | 863 | cacheflush(p); |
9a3bab7a | 864 | } |
0022c355 | 865 | fflush(stdout); |
9a3bab7a | 866 | psigtrace(p, SIGTRAP, true); |
24350cae DS |
867 | # ifdef IRIS |
868 | p->pid = fork(); | |
869 | # else | |
870 | p->pid = vfork(); | |
871 | # endif | |
ca69b757 | 872 | if (p->pid == -1) { |
9a3bab7a ML |
873 | panic("can't fork"); |
874 | } | |
875 | if (ischild(p->pid)) { | |
0022c355 | 876 | nocatcherrs(); |
9a3bab7a ML |
877 | traceme(); |
878 | if (infile != nil) { | |
2fd0f574 | 879 | infrom(infile); |
9a3bab7a ML |
880 | } |
881 | if (outfile != nil) { | |
2fd0f574 | 882 | outto(outfile); |
9a3bab7a | 883 | } |
e0a80343 | 884 | execv(argv[0], argv); |
86d0cc79 | 885 | _exit(1); |
9a3bab7a ML |
886 | } |
887 | pwait(p->pid, &status); | |
888 | getinfo(p, status); | |
889 | if (p->status != STOPPED) { | |
0022c355 ML |
890 | beginerrmsg(); |
891 | fprintf(stderr, "warning: cannot execute %s\n", argv[0]); | |
892 | } else { | |
893 | ptraced(p->pid); | |
9a3bab7a ML |
894 | } |
895 | } | |
896 | ||
2fd0f574 SL |
897 | /* |
898 | * Terminate a ptrace'd process. | |
899 | */ | |
900 | ||
901 | public pterm (p) | |
902 | Process p; | |
903 | { | |
904 | integer status; | |
905 | ||
906 | if (p != nil and p->pid != 0) { | |
0022c355 | 907 | ptrace(PKILL, p->pid, 0, 0); |
2fd0f574 SL |
908 | pwait(p->pid, &status); |
909 | unptraced(p->pid); | |
910 | } | |
911 | } | |
912 | ||
9a3bab7a | 913 | /* |
36fd36ba ML |
914 | * Continue a stopped process. The first argument points to a Process |
915 | * structure. Before the process is restarted it's user area is modified | |
916 | * according to the values in the structure. When this routine finishes, | |
9a3bab7a ML |
917 | * the structure has the new values from the process's user area. |
918 | * | |
919 | * Pcont terminates when the process stops with a signal pending that | |
920 | * is being traced (via psigtrace), or when the process terminates. | |
921 | */ | |
922 | ||
36fd36ba | 923 | private pcont(p, signo) |
9a3bab7a | 924 | Process p; |
36fd36ba | 925 | int signo; |
9a3bab7a | 926 | { |
2fd0f574 | 927 | int s, status; |
9a3bab7a ML |
928 | |
929 | if (p->pid == 0) { | |
0022c355 | 930 | error("program is not active"); |
9a3bab7a | 931 | } |
2fd0f574 | 932 | s = signo; |
9a3bab7a | 933 | do { |
2fd0f574 SL |
934 | setinfo(p, s); |
935 | if (traceexec) { | |
936 | printf("!! pcont from 0x%x with signal %d (%d)\n", | |
937 | p->reg[PROGCTR], s, p->signo); | |
938 | fflush(stdout); | |
939 | } | |
9a3bab7a | 940 | sigs_off(); |
0022c355 | 941 | if (ptrace(CONT, p->pid, p->reg[PROGCTR], p->signo) < 0) { |
ca69b757 | 942 | panic("error %d trying to continue process", errno); |
9a3bab7a ML |
943 | } |
944 | pwait(p->pid, &status); | |
945 | sigs_on(); | |
946 | getinfo(p, status); | |
0022c355 ML |
947 | if (p->status == STOPPED and traceexec and not istraced(p)) { |
948 | printf("!! ignored signal %d at 0x%x\n", | |
949 | p->signo, p->reg[PROGCTR]); | |
2fd0f574 SL |
950 | fflush(stdout); |
951 | } | |
952 | s = p->signo; | |
9a3bab7a | 953 | } while (p->status == STOPPED and not istraced(p)); |
2fd0f574 SL |
954 | if (traceexec) { |
955 | printf("!! pcont to 0x%x on signal %d\n", p->reg[PROGCTR], p->signo); | |
956 | fflush(stdout); | |
957 | } | |
9a3bab7a ML |
958 | } |
959 | ||
960 | /* | |
961 | * Single step as best ptrace can. | |
962 | */ | |
963 | ||
2fd0f574 | 964 | public pstep(p, signo) |
9a3bab7a | 965 | Process p; |
2fd0f574 | 966 | integer signo; |
9a3bab7a | 967 | { |
0022c355 | 968 | int s, status; |
9a3bab7a | 969 | |
0022c355 ML |
970 | s = signo; |
971 | do { | |
972 | setinfo(p, s); | |
973 | if (traceexec) { | |
974 | printf("!! pstep from 0x%x with signal %d (%d)\n", | |
975 | p->reg[PROGCTR], s, p->signo); | |
976 | fflush(stdout); | |
977 | } | |
978 | sigs_off(); | |
979 | if (ptrace(SSTEP, p->pid, p->reg[PROGCTR], p->signo) < 0) { | |
980 | panic("error %d trying to step process", errno); | |
981 | } | |
982 | pwait(p->pid, &status); | |
983 | sigs_on(); | |
984 | getinfo(p, status); | |
24350cae DS |
985 | # if mc68000 || m68000 |
986 | if (p->status == STOPPED and p->signo == SIGTRAP) { | |
987 | p->reg[PROGCTR] += 2; | |
988 | } | |
989 | # endif | |
0022c355 ML |
990 | if (p->status == STOPPED and traceexec and not istraced(p)) { |
991 | printf("!! pstep ignored signal %d at 0x%x\n", | |
992 | p->signo, p->reg[PROGCTR]); | |
993 | fflush(stdout); | |
994 | } | |
995 | s = p->signo; | |
996 | } while (p->status == STOPPED and not istraced(p)); | |
2fd0f574 | 997 | if (traceexec) { |
0022c355 ML |
998 | printf("!! pstep to 0x%x on signal %d\n", |
999 | p->reg[PROGCTR], p->signo); | |
2fd0f574 SL |
1000 | fflush(stdout); |
1001 | } | |
1002 | if (p->status != STOPPED) { | |
0022c355 ML |
1003 | if (p->exitval == 0) { |
1004 | error("program exited\n"); | |
1005 | } else { | |
1006 | error("program exited with code %d\n", p->exitval); | |
1007 | } | |
2fd0f574 | 1008 | } |
9a3bab7a ML |
1009 | } |
1010 | ||
1011 | /* | |
1012 | * Return from execution when the given signal is pending. | |
1013 | */ | |
1014 | ||
1015 | public psigtrace(p, sig, sw) | |
1016 | Process p; | |
1017 | int sig; | |
1018 | Boolean sw; | |
1019 | { | |
1020 | if (sw) { | |
1021 | p->sigset |= setrep(sig); | |
1022 | } else { | |
1023 | p->sigset &= ~setrep(sig); | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Don't catch any signals. | |
1029 | * Particularly useful when letting a process finish uninhibited. | |
1030 | */ | |
1031 | ||
1032 | public unsetsigtraces(p) | |
1033 | Process p; | |
1034 | { | |
1035 | p->sigset = 0; | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Turn off attention to signals not being caught. | |
1040 | */ | |
1041 | ||
392fe950 | 1042 | private sig_t sigfunc[NSIG]; |
9a3bab7a ML |
1043 | |
1044 | private sigs_off() | |
1045 | { | |
1046 | register int i; | |
1047 | ||
1048 | for (i = FIRSTSIG; i < LASTSIG; i++) { | |
1049 | if (i != SIGKILL) { | |
1050 | sigfunc[i] = signal(i, SIG_IGN); | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Turn back on attention to signals. | |
1057 | */ | |
1058 | ||
1059 | private sigs_on() | |
1060 | { | |
1061 | register int i; | |
1062 | ||
1063 | for (i = FIRSTSIG; i < LASTSIG; i++) { | |
1064 | if (i != SIGKILL) { | |
1065 | signal(i, sigfunc[i]); | |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Get process information from user area. | |
1072 | */ | |
1073 | ||
24350cae | 1074 | private getinfo (p, status) |
9a3bab7a ML |
1075 | register Process p; |
1076 | register int status; | |
1077 | { | |
1078 | register int i; | |
2fd0f574 | 1079 | Address addr; |
9a3bab7a ML |
1080 | |
1081 | p->signo = (status&0177); | |
1082 | p->exitval = ((status >> 8)&0377); | |
1083 | if (p->signo != STOPPED) { | |
1084 | p->status = FINISHED; | |
8ee6535a | 1085 | p->pid = 0; |
2fd0f574 | 1086 | p->reg[PROGCTR] = 0; |
9a3bab7a ML |
1087 | } else { |
1088 | p->status = p->signo; | |
1089 | p->signo = p->exitval; | |
1090 | p->exitval = 0; | |
24350cae DS |
1091 | # ifdef IRIS |
1092 | p->mask = readreg(p, RPS); | |
1093 | # else | |
1094 | p->sigcode = ptrace(UREAD, p->pid, &((struct user *)0)->u_code, 0); | |
1095 | p->mask = readreg(p, PS); | |
1096 | # endif | |
9a3bab7a | 1097 | for (i = 0; i < NREG; i++) { |
24350cae | 1098 | p->reg[i] = readreg(p, rloc[i]); |
9a3bab7a ML |
1099 | p->oreg[i] = p->reg[i]; |
1100 | } | |
24350cae DS |
1101 | # ifdef mc68000 |
1102 | if (p->status == STOPPED and p->signo == SIGTRAP and | |
1103 | p->reg[PROGCTR] > CODESTART | |
1104 | ) { | |
1105 | p->reg[PROGCTR] -= 2; | |
1106 | } | |
1107 | # endif | |
5870175c | 1108 | savetty(stdout, &(p->ttyinfo)); |
2fd0f574 | 1109 | addr = (Address) &(((struct user *) 0)->u_signal[p->signo]); |
0022c355 | 1110 | p->sigstatus = (Address) ptrace(UREAD, p->pid, addr, 0); |
9a3bab7a ML |
1111 | } |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * Set process's user area information from given process structure. | |
1116 | */ | |
1117 | ||
24350cae | 1118 | private setinfo (p, signo) |
9a3bab7a | 1119 | register Process p; |
36fd36ba | 1120 | int signo; |
9a3bab7a ML |
1121 | { |
1122 | register int i; | |
1123 | register int r; | |
1124 | ||
8ee6535a | 1125 | if (signo == DEFSIG) { |
2fd0f574 | 1126 | if (istraced(p) and (p->sigstatus == 0 or p->sigstatus == 1)) { |
8ee6535a ML |
1127 | p->signo = 0; |
1128 | } | |
1129 | } else { | |
36fd36ba | 1130 | p->signo = signo; |
9a3bab7a ML |
1131 | } |
1132 | for (i = 0; i < NREG; i++) { | |
1133 | if ((r = p->reg[i]) != p->oreg[i]) { | |
24350cae | 1134 | writereg(p, rloc[i], r); |
9a3bab7a ML |
1135 | } |
1136 | } | |
5870175c | 1137 | restoretty(stdout, &(p->ttyinfo)); |
9a3bab7a ML |
1138 | } |
1139 | ||
2fd0f574 SL |
1140 | /* |
1141 | * Return the address associated with the current signal. | |
1142 | * (Plus two since the address points to the beginning of a procedure). | |
1143 | */ | |
1144 | ||
1145 | public Address usignal (p) | |
1146 | Process p; | |
1147 | { | |
1148 | Address r; | |
1149 | ||
1150 | r = p->sigstatus; | |
1151 | if (r != 0 and r != 1) { | |
24350cae | 1152 | r += FUNCOFFSET; |
2fd0f574 SL |
1153 | } |
1154 | return r; | |
1155 | } | |
1156 | ||
9a3bab7a ML |
1157 | /* |
1158 | * Structure for reading and writing by words, but dealing with bytes. | |
1159 | */ | |
1160 | ||
1161 | typedef union { | |
1162 | Word pword; | |
1163 | Byte pbyte[sizeof(Word)]; | |
1164 | } Pword; | |
1165 | ||
1166 | /* | |
1167 | * Read (write) from (to) the process' address space. | |
1168 | * We must deal with ptrace's inability to look anywhere other | |
1169 | * than at a word boundary. | |
1170 | */ | |
1171 | ||
1172 | private Word fetch(); | |
1173 | private store(); | |
1174 | ||
1175 | private pio(p, op, seg, buff, addr, nbytes) | |
1176 | Process p; | |
1177 | PioOp op; | |
1178 | PioSeg seg; | |
1179 | char *buff; | |
1180 | Address addr; | |
1181 | int nbytes; | |
1182 | { | |
1183 | register int i; | |
1184 | register Address newaddr; | |
1185 | register char *cp; | |
1186 | char *bufend; | |
1187 | Pword w; | |
1188 | Address wordaddr; | |
1189 | int byteoff; | |
1190 | ||
1191 | if (p->status != STOPPED) { | |
1192 | error("program is not active"); | |
1193 | } | |
1194 | cp = buff; | |
1195 | newaddr = addr; | |
1196 | wordaddr = (newaddr&WMASK); | |
1197 | if (wordaddr != newaddr) { | |
1198 | w.pword = fetch(p, seg, wordaddr); | |
1199 | for (i = newaddr - wordaddr; i < sizeof(Word) and nbytes > 0; i++) { | |
1200 | if (op == PREAD) { | |
1201 | *cp++ = w.pbyte[i]; | |
1202 | } else { | |
1203 | w.pbyte[i] = *cp++; | |
1204 | } | |
1205 | nbytes--; | |
1206 | } | |
1207 | if (op == PWRITE) { | |
1208 | store(p, seg, wordaddr, w.pword); | |
1209 | } | |
1210 | newaddr = wordaddr + sizeof(Word); | |
1211 | } | |
1212 | byteoff = (nbytes&(~WMASK)); | |
1213 | nbytes -= byteoff; | |
1214 | bufend = cp + nbytes; | |
ca6575f0 SL |
1215 | #ifdef tahoe |
1216 | if (((int)cp)&WMASK) { | |
1217 | /* | |
1218 | * Must copy a byte at a time, buffer not word addressable. | |
1219 | */ | |
1220 | while (cp < bufend) { | |
1221 | if (op == PREAD) { | |
1222 | w.pword = fetch(p, seg, newaddr); | |
1223 | for (i = 0; i < sizeof(Word); i++) | |
1224 | *cp++ = w.pbyte[i]; | |
1225 | } else { | |
1226 | for (i = 0; i < sizeof(Word); i++) | |
1227 | w.pbyte[i] = *cp++; | |
1228 | store(p, seg, newaddr, w.pword); | |
1229 | } | |
1230 | newaddr += sizeof(Word); | |
1231 | } | |
1232 | } else { | |
1233 | /* | |
1234 | * Buffer, word aligned, act normally... | |
1235 | */ | |
1236 | #endif | |
9a3bab7a ML |
1237 | while (cp < bufend) { |
1238 | if (op == PREAD) { | |
1239 | *((Word *) cp) = fetch(p, seg, newaddr); | |
1240 | } else { | |
1241 | store(p, seg, newaddr, *((Word *) cp)); | |
1242 | } | |
1243 | cp += sizeof(Word); | |
1244 | newaddr += sizeof(Word); | |
1245 | } | |
ca6575f0 SL |
1246 | #ifdef tahoe |
1247 | } | |
1248 | #endif | |
9a3bab7a ML |
1249 | if (byteoff > 0) { |
1250 | w.pword = fetch(p, seg, newaddr); | |
1251 | for (i = 0; i < byteoff; i++) { | |
1252 | if (op == PREAD) { | |
1253 | *cp++ = w.pbyte[i]; | |
1254 | } else { | |
1255 | w.pbyte[i] = *cp++; | |
1256 | } | |
1257 | } | |
1258 | if (op == PWRITE) { | |
1259 | store(p, seg, newaddr, w.pword); | |
1260 | } | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Get a word from a process at the given address. | |
1266 | * The address is assumed to be on a word boundary. | |
1267 | * | |
1268 | * A simple cache scheme is used to avoid redundant ptrace calls | |
1269 | * to the instruction space since it is assumed to be pure. | |
1270 | * | |
1271 | * It is necessary to use a write-through scheme so that | |
1272 | * breakpoints right next to each other don't interfere. | |
1273 | */ | |
1274 | ||
1275 | private Integer nfetchs, nreads, nwrites; | |
1276 | ||
1277 | private Word fetch(p, seg, addr) | |
1278 | Process p; | |
1279 | PioSeg seg; | |
1280 | register int addr; | |
1281 | { | |
1282 | register CacheWord *wp; | |
1283 | register Word w; | |
1284 | ||
1285 | switch (seg) { | |
1286 | case TEXTSEG: | |
1287 | ++nfetchs; | |
1288 | wp = &p->word[cachehash(addr)]; | |
1289 | if (addr == 0 or wp->addr != addr) { | |
1290 | ++nreads; | |
0022c355 | 1291 | w = ptrace(IREAD, p->pid, addr, 0); |
9a3bab7a ML |
1292 | wp->addr = addr; |
1293 | wp->val = w; | |
1294 | } else { | |
1295 | w = wp->val; | |
1296 | } | |
1297 | break; | |
1298 | ||
1299 | case DATASEG: | |
0022c355 | 1300 | w = ptrace(DREAD, p->pid, addr, 0); |
9a3bab7a ML |
1301 | break; |
1302 | ||
1303 | default: | |
1304 | panic("fetch: bad seg %d", seg); | |
1305 | /* NOTREACHED */ | |
1306 | } | |
1307 | return w; | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * Put a word into the process' address space at the given address. | |
1312 | * The address is assumed to be on a word boundary. | |
1313 | */ | |
1314 | ||
1315 | private store(p, seg, addr, data) | |
1316 | Process p; | |
1317 | PioSeg seg; | |
1318 | int addr; | |
1319 | Word data; | |
1320 | { | |
1321 | register CacheWord *wp; | |
1322 | ||
1323 | switch (seg) { | |
1324 | case TEXTSEG: | |
1325 | ++nwrites; | |
1326 | wp = &p->word[cachehash(addr)]; | |
1327 | wp->addr = addr; | |
1328 | wp->val = data; | |
0022c355 | 1329 | ptrace(IWRITE, p->pid, addr, data); |
9a3bab7a ML |
1330 | break; |
1331 | ||
1332 | case DATASEG: | |
0022c355 | 1333 | ptrace(DWRITE, p->pid, addr, data); |
9a3bab7a ML |
1334 | break; |
1335 | ||
1336 | default: | |
1337 | panic("store: bad seg %d", seg); | |
1338 | /* NOTREACHED */ | |
1339 | } | |
1340 | } | |
1341 | ||
0022c355 ML |
1342 | /* |
1343 | * Flush the instruction cache associated with a process. | |
1344 | */ | |
1345 | ||
1346 | private cacheflush (p) | |
1347 | Process p; | |
1348 | { | |
1349 | bzero(p->word, sizeof(p->word)); | |
1350 | } | |
1351 | ||
9a3bab7a ML |
1352 | public printptraceinfo() |
1353 | { | |
1354 | printf("%d fetchs, %d reads, %d writes\n", nfetchs, nreads, nwrites); | |
1355 | } | |
1356 | ||
1357 | /* | |
2fd0f574 SL |
1358 | * Redirect input. |
1359 | * Assuming this is called from a child, we should be careful to avoid | |
1360 | * (possibly) shared standard I/O buffers. | |
1361 | */ | |
1362 | ||
1363 | private infrom (filename) | |
1364 | String filename; | |
1365 | { | |
1366 | Fileid in; | |
1367 | ||
1368 | in = open(filename, 0); | |
1369 | if (in == -1) { | |
1370 | write(2, "can't read ", 11); | |
1371 | write(2, filename, strlen(filename)); | |
1372 | write(2, "\n", 1); | |
1373 | _exit(1); | |
1374 | } | |
1375 | fswap(0, in); | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * Redirect standard output. | |
1380 | * Same assumptions as for "infrom" above. | |
1381 | */ | |
1382 | ||
1383 | private outto (filename) | |
1384 | String filename; | |
1385 | { | |
1386 | Fileid out; | |
1387 | ||
1388 | out = creat(filename, 0666); | |
1389 | if (out == -1) { | |
1390 | write(2, "can't write ", 12); | |
1391 | write(2, filename, strlen(filename)); | |
1392 | write(2, "\n", 1); | |
1393 | _exit(1); | |
1394 | } | |
1395 | fswap(1, out); | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Swap file numbers, useful for redirecting standard input or output. | |
9a3bab7a ML |
1400 | */ |
1401 | ||
1402 | private fswap(oldfd, newfd) | |
2fd0f574 SL |
1403 | Fileid oldfd; |
1404 | Fileid newfd; | |
9a3bab7a ML |
1405 | { |
1406 | if (oldfd != newfd) { | |
1407 | close(oldfd); | |
1408 | dup(newfd); | |
1409 | close(newfd); | |
1410 | } | |
1411 | } | |
f7adfe8e | 1412 | |
f7adfe8e | 1413 | /* |
0022c355 | 1414 | * Signal name manipulation. |
f7adfe8e | 1415 | */ |
0022c355 ML |
1416 | |
1417 | private String signames[NSIG] = { | |
1418 | 0, | |
1419 | "HUP", "INT", "QUIT", "ILL", "TRAP", | |
1420 | "IOT", "EMT", "FPE", "KILL", "BUS", | |
1421 | "SEGV", "SYS", "PIPE", "ALRM", "TERM", | |
1422 | 0, "STOP", "TSTP", "CONT", "CHLD", | |
1423 | "TTIN", "TTOU", "TINT", "XCPU", "XFSZ", | |
ca6575f0 | 1424 | "VTALRM", "PROF", "WINCH", "USR1", "USR2" |
f7adfe8e SL |
1425 | }; |
1426 | ||
1427 | /* | |
0022c355 ML |
1428 | * Get the signal number associated with a given name. |
1429 | * The name is first translated to upper case if necessary. | |
f7adfe8e | 1430 | */ |
0022c355 ML |
1431 | |
1432 | public integer siglookup (s) | |
f7adfe8e SL |
1433 | String s; |
1434 | { | |
0022c355 ML |
1435 | register char *p, *q; |
1436 | char buf[100]; | |
1437 | integer i; | |
1438 | ||
1439 | p = s; | |
1440 | q = buf; | |
1441 | while (*p != '\0') { | |
1442 | if (*p >= 'a' and *p <= 'z') { | |
1443 | *q = (*p - 'a') + 'A'; | |
1444 | } else { | |
1445 | *q = *p; | |
1446 | } | |
1447 | ++p; | |
1448 | ++q; | |
1449 | } | |
1450 | *q = '\0'; | |
1451 | p = buf; | |
1452 | if (buf[0] == 'S' and buf[1] == 'I' and buf[2] == 'G') { | |
1453 | p += 3; | |
1454 | } | |
1455 | i = 1; | |
1456 | for (;;) { | |
1457 | if (i >= sizeof(signames) div sizeof(signames[0])) { | |
1458 | error("signal \"%s\" unknown", s); | |
1459 | i = 0; | |
1460 | break; | |
1461 | } | |
1462 | if (signames[i] != nil and streq(signames[i], p)) { | |
1463 | break; | |
1464 | } | |
1465 | ++i; | |
1466 | } | |
1467 | return i; | |
f7adfe8e SL |
1468 | } |
1469 | ||
1470 | /* | |
0022c355 ML |
1471 | * Print all signals being ignored by the debugger. |
1472 | * These signals are auotmatically | |
f7adfe8e SL |
1473 | * passed on to the debugged process. |
1474 | */ | |
0022c355 ML |
1475 | |
1476 | public printsigsignored (p) | |
57a9bb29 | 1477 | Process p; |
f7adfe8e | 1478 | { |
57a9bb29 | 1479 | printsigs(~p->sigset); |
f7adfe8e SL |
1480 | } |
1481 | ||
1482 | /* | |
1483 | * Print all signals being intercepted by | |
1484 | * the debugger for the specified process. | |
1485 | */ | |
0022c355 | 1486 | |
57a9bb29 SL |
1487 | public printsigscaught(p) |
1488 | Process p; | |
f7adfe8e | 1489 | { |
57a9bb29 | 1490 | printsigs(p->sigset); |
f7adfe8e SL |
1491 | } |
1492 | ||
0022c355 ML |
1493 | private printsigs (set) |
1494 | integer set; | |
57a9bb29 | 1495 | { |
0022c355 ML |
1496 | integer s; |
1497 | char separator[2]; | |
1498 | ||
1499 | separator[0] = '\0'; | |
1500 | for (s = 1; s < sizeof(signames) div sizeof(signames[0]); s++) { | |
1501 | if (set & setrep(s)) { | |
1502 | if (signames[s] != nil) { | |
1503 | printf("%s%s", separator, signames[s]); | |
1504 | separator[0] = ' '; | |
1505 | separator[1] = '\0'; | |
1506 | } | |
57a9bb29 | 1507 | } |
0022c355 ML |
1508 | } |
1509 | if (separator[0] == ' ') { | |
57a9bb29 | 1510 | putchar('\n'); |
57a9bb29 SL |
1511 | } |
1512 | } |