Commit | Line | Data |
---|---|---|
b4484850 HK |
1 | #include "head.h" |
2 | #include <a.out.h> | |
3 | #include <sys/stat.h> | |
4 | ||
5 | struct user u; | |
6 | int compar(); | |
7 | char *symfil; | |
8 | ||
9 | /* initialize file and procedure tables */ | |
10 | initfp() { | |
11 | struct nlist stentry; | |
12 | register struct proct *procp; | |
13 | register struct filet *filep; | |
14 | struct stat stbuf; | |
15 | ||
16 | long soffset; | |
17 | int i; | |
18 | char class; | |
19 | register char *p, *q; | |
20 | ||
21 | sbuf.fd = txtmap.ufd; | |
22 | soffset = ststart; | |
23 | blseek(&sbuf,ststart,0); | |
24 | filep = files = badfile = (struct filet *) sbrk(sizeof filep[0]); | |
25 | procp = procs = badproc = (struct proct *) sbrk(sizeof procp[0]); | |
26 | ||
27 | for(;;) { | |
28 | if (bread(&sbuf, &stentry, sizeof stentry) < | |
29 | sizeof stentry) break; | |
30 | class = stentry.n_type & STABMASK; | |
31 | switch (class & STABMASK) { | |
32 | case N_SO: | |
33 | case N_SOL: | |
34 | if (filep == badfile) { | |
35 | p = sbrk(FILEINCR*sizeof filep[0]); | |
36 | if (p < 0) { | |
37 | perror("sdb"); | |
38 | exit(4); | |
39 | } | |
40 | q = p + FILEINCR*sizeof filep[0]; | |
41 | while (p > (char *) procs) | |
42 | *--q = *--p; | |
43 | badfile += FILEINCR; | |
44 | procp = (struct proct *) | |
45 | ((char *) procp + | |
46 | FILEINCR*sizeof filep[0]); | |
47 | procs = (struct proct *) | |
48 | ((char *) procs + | |
49 | FILEINCR*sizeof filep[0]); | |
50 | badproc = (struct proct *) | |
51 | ((char *)badproc + | |
52 | FILEINCR*sizeof filep[0]); | |
53 | } | |
54 | filep->faddr = stentry.n_value; | |
55 | filep->lineflag = (class == N_SOL); | |
56 | filep->stf_offset = soffset; | |
57 | p = filep->sfilename; | |
58 | for (;;) { | |
59 | for (i=0; i<8; i++) *p++ = stentry.n_name[i]; | |
60 | if (*(p-1) == '\0') break; | |
61 | if (bread(&sbuf, &stentry, sizeof stentry) | |
62 | < sizeof stentry) | |
63 | error("Bad N_SO entry (1)"); | |
64 | if ((stentry.n_type & STABMASK) != | |
65 | (unsigned char) class) | |
66 | error("Bad N_SO entry (2)"); | |
67 | soffset += sizeof stentry; | |
68 | } | |
69 | if (stat(filep->sfilename, &stbuf) == -1) | |
70 | printf("Warning: `%s' not found\n", | |
71 | filep->sfilename); | |
72 | else if (stbuf.st_mtime > symtime) | |
73 | printf("Warning: `%s' newer than `%s'\n", | |
74 | filep->sfilename, | |
75 | symfil); | |
76 | filep++; | |
77 | break; | |
78 | ||
79 | case N_TEXT: | |
80 | if (stentry.n_name[0] != '_') break; | |
81 | case N_FUN: | |
82 | case N_ENTRY: | |
83 | if (procp == badproc) { | |
84 | if (sbrk(PROCINCR*sizeof procp[0]) < 0) { | |
85 | perror("sdb"); | |
86 | exit(4); | |
87 | } | |
88 | badproc += PROCINCR; | |
89 | } | |
90 | for(i=0; i<8; i++) | |
91 | procp->pname[i] = stentry.n_name[i]; | |
92 | procp->paddr = stentry.n_value; | |
93 | procp->st_offset = soffset; | |
94 | procp->sfptr = (class != N_TEXT) ? filep - 1 : badfile; | |
95 | procp->lineno = (class != N_TEXT) ? stentry.n_desc : 0; | |
96 | procp->entrypt = (class & STABMASK) == N_ENTRY; | |
97 | procp++; | |
98 | break; | |
99 | } | |
100 | if (stentry.n_type & N_EXT && !extstart) { | |
101 | extstart = soffset; | |
102 | } | |
103 | soffset += sizeof stentry; | |
104 | } | |
105 | qsort(procs, procp-procs, sizeof procs[0], compar); | |
106 | badproc->st_offset = soffset; | |
107 | badproc->sfptr = procp->sfptr = badfile; | |
108 | badproc->pname[0] = badfile->sfilename[0]= | |
109 | procp->pname[0] = filep->sfilename[0] = '\0'; | |
110 | ||
111 | setcur(1); | |
112 | } | |
113 | ||
114 | /* returns current procedure from state (curfile, fline) */ | |
115 | struct proct * | |
116 | curproc() { | |
117 | register ADDR addr; | |
118 | ||
119 | addr = getaddr("", fline); | |
120 | if (addr == -1) return(badproc); | |
121 | return(adrtoprocp(addr)); | |
122 | ||
123 | } | |
124 | ||
125 | /* returns procedure s, uses curproc() if s == NULL */ | |
126 | ||
127 | struct proct * | |
128 | findproc(s) | |
129 | char *s; { | |
130 | register struct proct *p; | |
131 | ||
132 | if (s[0] == '\0') return(curproc()); | |
133 | ||
134 | for(p=procs; p->pname[0]; p++) | |
135 | if (eqstr(p->pname, s)) return(p); | |
136 | ||
137 | if (debug) printf("%s(): unknown name\n", s); | |
138 | return(badproc); | |
139 | } | |
140 | ||
141 | /* returns file s containing filename */ | |
142 | struct filet * | |
143 | findfile(s) | |
144 | char *s; { | |
145 | register struct filet *f; | |
146 | for (f=files; f->sfilename[0]; f++) { | |
147 | if (eqstr(f->sfilename, s)) { | |
148 | for( ; f->lineflag; f--) ; | |
149 | if (f < files) error("Bad file array"); | |
150 | return(f); | |
151 | } | |
152 | } | |
153 | return(f); | |
154 | } | |
155 | ||
156 | /* | |
157 | * slookup(): | |
158 | * looks up variable matching pat starting at offset in a.out, searching | |
159 | * backwards, ignoring nested blocks to beginning to procedure. | |
160 | * Returns its offset and symbol table entries decoded in sl_* | |
161 | * | |
162 | * If comblk == "*" then match both within and outside common blocks, | |
163 | * if comblk == "" then match only outside common blocks, | |
164 | * else match only within comblk. | |
165 | */ | |
166 | ||
167 | long | |
168 | slookup(pat, poffset, stelt) | |
169 | long poffset; char *pat; { | |
170 | slookinit(); | |
171 | slooknext(pat, poffset, stelt, "*"); | |
172 | } | |
173 | ||
174 | int clevel, level, fnameflag, comfound, incomm; | |
175 | ||
176 | slookinit() { | |
177 | clevel = level = fnameflag = comfound = incomm = 0; | |
178 | } | |
179 | ||
180 | long | |
181 | slooknext(pat, poffset, stelt, comblk) | |
182 | long poffset; char *pat, *comblk; { | |
183 | register int i; | |
184 | register long offset; | |
185 | char class, *q; | |
186 | struct nlist stentry; | |
187 | struct proct *procp, *p; | |
188 | ||
189 | offset = poffset + sizeof stentry; | |
190 | if (debug) printf("slookup(%s,%d)\n",pat,offset); | |
191 | blseek(&sbuf, offset, 0); | |
192 | ||
193 | for (;;) { | |
194 | offset -= sizeof stentry; | |
195 | if (offset < ststart) break; | |
196 | if (bread(&sbuf, &stentry+1, -sizeof stentry) | |
197 | < sizeof stentry) break; | |
198 | class = stentry.n_type & STABMASK; | |
199 | switch (class & STABMASK) { | |
200 | case 0: | |
201 | break; | |
202 | case N_FUN: | |
203 | return(-1); | |
204 | case N_RBRAC: | |
205 | level++; | |
206 | break; | |
207 | case N_LBRAC: | |
208 | level--; | |
209 | break; | |
210 | case N_ECOMM: | |
211 | for (q = &stentry.n_name[7]; q>=stentry.n_name; q--) { | |
212 | if (*q == '_') { | |
213 | *q = '\0'; | |
214 | break; | |
215 | } | |
216 | } | |
217 | if (eqpat(comblk, stentry.n_name)) | |
218 | comfound = 1; | |
219 | incomm = 1; | |
220 | case N_ECOML: | |
221 | clevel++; | |
222 | break; | |
223 | case N_BCOMM: | |
224 | comfound = incomm = 0; | |
225 | clevel--; | |
226 | break; | |
227 | case N_FNAME: | |
228 | if (fnameflag) | |
229 | break; | |
230 | procp = findproc(stentry.n_name); | |
231 | for (p=procs; p->pname[0]; p++) { | |
232 | if (p->entrypt == 0 && | |
233 | p->st_offset > procp->st_offset && | |
234 | p->st_offset < offset) | |
235 | offset = p->st_offset; | |
236 | } | |
237 | clevel = level = 0; | |
238 | fnameflag++; | |
239 | blseek(&sbuf, offset, 0); | |
240 | break; | |
241 | default: | |
242 | if (level <= 0 && eqpat(pat, stentry.n_name) && | |
243 | stentry.n_name[0] && class & STABTYPES && | |
244 | (eqstr("*", comblk) || | |
245 | (comblk[0] == '\0' && incomm == 0) || | |
246 | comfound) && | |
247 | (stelt == (class == N_SSYM))) { | |
248 | if (class == N_LENG) { | |
249 | sl_size = stentry.n_value; | |
250 | offset -= sizeof stentry; | |
251 | bread(&sbuf, &stentry+1, | |
252 | -sizeof stentry); | |
253 | } | |
254 | else sl_size = 0; | |
255 | sl_class = stentry.n_type & STABMASK; | |
256 | sl_type = stentry.n_desc; | |
257 | sl_addr = stentry.n_value; | |
258 | for (i=0; i<8; i++) sl_name[i] = | |
259 | stentry.n_name[i]; | |
260 | if (clevel != 0) docomm(offset); | |
261 | return(offset - sizeof stentry); | |
262 | } | |
263 | } | |
264 | } | |
265 | return(-1); | |
266 | } | |
267 | ||
268 | /* | |
269 | * Look up global variable matching pat | |
270 | * Return its offset and symbol table entries decoded in sl_* | |
271 | */ | |
272 | long | |
273 | globallookup(pat, filestart, stelt) | |
274 | char *pat; long filestart; { | |
275 | register int offset, i; | |
276 | struct nlist stentry; | |
277 | int class, clevel; | |
278 | ||
279 | if (debug) printf("globallookup(%s,%d)\n", pat,filestart); | |
280 | blseek(&sbuf, filestart, 0); | |
281 | offset = filestart - sizeof stentry; | |
282 | clevel = 0; | |
283 | do { | |
284 | if (bread(&sbuf, &stentry, sizeof stentry) < | |
285 | sizeof stentry) return(-1); | |
286 | offset += sizeof stentry; | |
287 | } while ((stentry.n_type & STABMASK) == N_SO); | |
288 | for (;;) { | |
289 | class = stentry.n_type & STABMASK; | |
290 | switch (class & STABMASK) { | |
291 | case N_SO: | |
292 | return(-1); | |
293 | case N_ECOMM: | |
294 | clevel--; | |
295 | break; | |
296 | case N_BCOMM: | |
297 | clevel++; | |
298 | break; | |
299 | default: | |
300 | if (eqpat(pat, stentry.n_name) | |
301 | && stentry.n_name[0] && class & STABTYPES) { | |
302 | sl_class = stentry.n_type & STABMASK; | |
303 | if (sl_class != N_GSYM && sl_class != N_SSYM && | |
304 | sl_class != N_STSYM) goto g1; | |
305 | if (stelt != (sl_class == N_SSYM)) goto g1; | |
306 | sl_size = 0; | |
307 | sl_type = stentry.n_desc; | |
308 | sl_addr = stentry.n_value; | |
309 | for (i=0; i<8; i++) sl_name[i] = stentry.n_name[i]; | |
310 | if (clevel != 0) docomm(offset); | |
311 | goto g2; | |
312 | } | |
313 | } | |
314 | g1: if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) | |
315 | return(-1); | |
316 | offset += sizeof stentry; | |
317 | } | |
318 | g2: bread(&sbuf, &stentry, sizeof stentry); | |
319 | if (((stentry.n_type & STABMASK) == N_LENG) && | |
320 | (eqpat(sl_name, stentry.n_name))) | |
321 | sl_size = stentry.n_value; | |
322 | ||
323 | if (sl_class == N_GSYM && (clevel == 0)) { | |
324 | blseek(&sbuf, extstart, 0); | |
325 | for(;;) { | |
326 | if (bread(&sbuf, &stentry, sizeof stentry) | |
327 | < sizeof stentry) | |
328 | return(-1); | |
329 | if (stentry.n_name[0] != '_') continue; | |
330 | if (eqpatr(sl_name, stentry.n_name+1, 1)) { | |
331 | sl_addr = stentry.n_value; | |
332 | break; | |
333 | } | |
334 | } | |
335 | } | |
336 | return(offset + sizeof stentry); | |
337 | } | |
338 | ||
339 | /* core address to procedure (pointer to proc array) */ | |
340 | struct proct * | |
341 | adrtoprocp(addr) | |
342 | ADDR addr; { | |
343 | register struct proct *procp, *lastproc; | |
344 | lastproc = badproc; | |
345 | for (procp=procs; procp->pname[0]; procp++) { | |
346 | if (procp->paddr > addr) break; | |
347 | if (procp->entrypt == 0) | |
348 | lastproc = procp; | |
349 | } | |
350 | return (lastproc); | |
351 | } | |
352 | ||
353 | ||
354 | /* core address to file (pointer to file array) */ | |
355 | struct filet * | |
356 | adrtofilep(addr) | |
357 | ADDR addr; { | |
358 | register struct filet *filep; | |
359 | for (filep=files; filep->sfilename[0]; filep++) { | |
360 | if (filep->faddr > addr) break; | |
361 | } | |
362 | return (filep != files ? filep-1 : badfile); | |
363 | } | |
364 | ||
365 | /* core address to linenumber */ | |
366 | long lastoffset; | |
367 | ||
368 | adrtolineno(addr) | |
369 | ADDR addr; { | |
370 | register int lineno; | |
371 | long offset; | |
372 | struct nlist stentry; | |
373 | ||
374 | lineno = lastoffset = -1; | |
375 | offset = adrtoproc(addr)->st_offset; | |
376 | blseek(&sbuf, offset, 0); | |
377 | for (;;) { | |
378 | if (bread(&sbuf, &stentry, sizeof stentry) | |
379 | < sizeof stentry) break; | |
380 | if (stentry.n_type == N_SLINE) { | |
381 | if (stentry.n_value > addr) break; | |
382 | lastoffset = offset; | |
383 | lineno = stentry.n_desc; | |
384 | } | |
385 | offset += sizeof stentry; | |
386 | } | |
387 | return (lineno); | |
388 | } | |
389 | ||
390 | ||
391 | /* address to a.out offset */ | |
392 | long | |
393 | adrtostoffset(addr) | |
394 | ADDR addr; { | |
395 | adrtolineno(addr); | |
396 | return(lastoffset); | |
397 | } | |
398 | ||
399 | ||
400 | /* | |
401 | * Set (curfile, lineno) from core image. | |
402 | * Returns 1 if there is a core image, 0 otherwise. | |
403 | * | |
404 | * Print the current line iff verbose is set. | |
405 | */ | |
406 | setcur(verbose) { | |
407 | register struct proct *procp; | |
408 | ||
409 | dot = *(ADDR *) (((ADDR) &u) + PC); | |
410 | ||
411 | if (dot == 0) { | |
412 | printf("No core image\n"); | |
413 | goto setmain; | |
414 | } | |
415 | procp = adrtoprocp(dot); | |
416 | if ((procp->sfptr) != badfile) { | |
417 | finit(adrtofilep(dot)->sfilename); | |
418 | ffind(adrtolineno(dot)); | |
419 | if (verbose) { | |
420 | printf("%.8s:", procp->pname); | |
421 | fprint(); | |
422 | } | |
423 | return(1); | |
424 | } | |
425 | if (verbose) { | |
426 | if (procp->pname[0] == '_') | |
427 | printf("%.7s: address 0x%x\n", procp->pname+1, dot); | |
428 | else | |
429 | printf("%.8s: address %d\n", procp->pname, dot); | |
430 | } | |
431 | ||
432 | setmain: | |
433 | procp = findproc("MAIN_"); | |
434 | if ((procp->pname[0] != 'M') || (procp->sfptr == badfile)) { | |
435 | procp = findproc("main"); | |
436 | if ((procp->pname[0] != 'm') || (procp->sfptr == badfile)) { | |
437 | nolines = 1; | |
438 | printf("main not compiled with debug flag\n"); | |
439 | return(0); | |
440 | } | |
441 | } | |
442 | finit(procp->sfptr->sfilename); | |
443 | ffind(procp->lineno); | |
444 | return(0); | |
445 | } | |
446 | ||
447 | compar(a, b) | |
448 | struct proct *a, *b; { | |
449 | if (a->paddr == b->paddr) { | |
450 | if (a->pname[0] == '_') return(-1); | |
451 | if (b->pname[0] == '_') return(1); | |
452 | return(0); | |
453 | } | |
454 | return(a->paddr < b->paddr ? -1 : 1); | |
455 | } | |
456 | ||
457 | /* gets offset of file or procedure named s */ | |
458 | nametooffset(s) | |
459 | char *s; { | |
460 | register struct filet *f; | |
461 | register struct proct *p; | |
462 | ||
463 | if (*s == '\0') | |
464 | return(-1); | |
465 | if (eqany('.', s)) { | |
466 | f = findfile(s); | |
467 | return(f->sfilename[0] ? f->stf_offset : -1); | |
468 | } | |
469 | p = findproc(s); | |
470 | return(p->pname[0] ? p->st_offset : -1); | |
471 | } | |
472 | /* returns s if its a filename, its file otherwise */ | |
473 | char * | |
474 | nametofile(s) | |
475 | char *s; { | |
476 | register struct proct *p; | |
477 | ||
478 | if (eqany('.', s)) { | |
479 | return(s); | |
480 | } | |
481 | p = findproc(s); | |
482 | return(adrtofilep(p->paddr)->sfilename); | |
483 | } | |
484 | ||
485 | ||
486 | /* line number to address, starting at offset in a.out */ | |
487 | /* assumes that offset is within file */ | |
488 | lntoaddr(lineno, offset, file) | |
489 | long offset; char *file; { | |
490 | struct nlist stentry; | |
491 | register int i, ignore = 0; | |
492 | register int bestln=BIGNUM; | |
493 | ADDR bestaddr; | |
494 | char *p; | |
495 | ||
496 | blseek(&sbuf, offset, 0); | |
497 | ||
498 | do { | |
499 | if (bread(&sbuf, &stentry, sizeof stentry) < | |
500 | sizeof stentry) return(-1); | |
501 | } while ((stentry.n_type & STABMASK) == N_SO); | |
502 | for (;;) { | |
503 | switch(stentry.n_type & STABMASK) { | |
504 | case N_SLINE: | |
505 | if (!ignore) { | |
506 | if (stentry.n_desc == lineno) | |
507 | return(stentry.n_value); | |
508 | if (stentry.n_desc > lineno && | |
509 | stentry.n_desc < bestln) { | |
510 | bestln = stentry.n_desc; | |
511 | bestaddr = stentry.n_value; | |
512 | } | |
513 | } | |
514 | break; | |
515 | ||
516 | case N_SO: | |
517 | goto ret; | |
518 | ||
519 | case N_SOL: | |
520 | p = file; | |
521 | for (;;) { | |
522 | for (i=0; i<8; i++) { | |
523 | if (*p != stentry.n_name[i]) goto neq; | |
524 | if (*p++ == '\0') break; | |
525 | } | |
526 | if (stentry.n_name[7] == '\0') | |
527 | break; | |
528 | if (bread(&sbuf, &stentry, sizeof stentry) | |
529 | < sizeof stentry) | |
530 | error("Bad N_SO entry (1)"); | |
531 | if ((stentry.n_type & STABMASK) != | |
532 | (unsigned char) N_SOL) | |
533 | error("Bad N_SO entry (2)"); | |
534 | } | |
535 | ignore = 0; | |
536 | break; | |
537 | ||
538 | neq: ignore++; | |
539 | break; | |
540 | } | |
541 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) | |
542 | break; | |
543 | } | |
544 | ret: return(bestln == BIGNUM ? -1 : bestaddr); | |
545 | } | |
546 | ||
547 | /* gets address of proc:number */ | |
548 | getaddr(proc,integ) | |
549 | char *proc; { | |
550 | register long offset; | |
551 | register char *s, *f; | |
552 | ADDR addr; | |
553 | ||
554 | s = proc[0] ? proc : curfile; | |
555 | if (*s == '\0') | |
556 | return(-1); | |
557 | offset = nametooffset(s); | |
558 | f = nametofile(s); | |
559 | if (debug) printf("getaddr() computed offset %d", offset); | |
560 | if (offset == -1) { | |
561 | addr = extaddr(proc); | |
562 | if (addr != -1) addr += 2; /* MACHINE DEPENDENT */ | |
563 | if (debug) printf(" extaddr computed %d\n", addr); | |
564 | return(addr); | |
565 | } | |
566 | if (integ) | |
567 | addr = lntoaddr(integ, offset, s); | |
568 | else { | |
569 | addr = findproc(proc)->paddr + 2; /* MACHINE DEPENDENT */ | |
570 | addr = lntoaddr(adrtolineno(addr)+1, offset, f); | |
571 | } | |
572 | if (debug) printf(" and addr %d\n", addr); | |
573 | if (addr == -1) return(-1); | |
574 | return(addr); | |
575 | } | |
576 | ||
577 | /* returns address of external */ | |
578 | ADDR | |
579 | extaddr(name) | |
580 | char *name; { | |
581 | struct nlist stentry; | |
582 | blseek(&sbuf, extstart, 0); | |
583 | ||
584 | for (;;) { | |
585 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) | |
586 | return(-1); | |
587 | if (stentry.n_name[0] == '_' && | |
588 | eqpatr(name, stentry.n_name+1, 1)) | |
589 | return(stentry.n_value); | |
590 | } | |
591 | } | |
592 | ||
593 | /* find enclosing common blocks and fix up addresses */ | |
594 | docomm(offset) | |
595 | long offset; { | |
596 | struct nlist stentry; | |
597 | ||
598 | for (;;) { | |
599 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) { | |
600 | error("Bad common block"); | |
601 | return; | |
602 | } | |
603 | sl_class = N_GSYM; | |
604 | if ((stentry.n_type & STABMASK) == N_ECOMM) { | |
605 | sl_addr += extaddr(stentry.n_name); | |
606 | blseek(&sbuf, offset, 0); | |
607 | return; | |
608 | } | |
609 | if ((stentry.n_type & STABMASK) == N_ECOML) { | |
610 | sl_addr += stentry.n_value; | |
611 | blseek(&sbuf, offset, 0); | |
612 | return; | |
613 | } | |
614 | } | |
615 | } | |
616 | ||
617 | /* determine if class is that of a variable */ | |
618 | char pctypes[] = {N_GSYM, N_STSYM, N_LCSYM, N_RSYM, N_SSYM, N_LSYM, | |
619 | N_PSYM, 0}; | |
620 | varclass(class) | |
621 | char class; { | |
622 | char *p; | |
623 | ||
624 | for (p=pctypes; *p; p++) { | |
625 | if (class == *p) | |
626 | return(1); | |
627 | } | |
628 | return(0); | |
629 | } |