| 1 | static char sccsid[] = "@(#)symt.c 4.3 %G%"; |
| 2 | #include "head.h" |
| 3 | #include <a.out.h> |
| 4 | #include <stab.h> |
| 5 | |
| 6 | #ifndef STABTYPES |
| 7 | #define STABTYPES N_STAB |
| 8 | #endif |
| 9 | #include <sys/stat.h> |
| 10 | |
| 11 | struct user u; |
| 12 | int compar(); |
| 13 | char *symfil; |
| 14 | |
| 15 | #ifdef FLEXNAMES |
| 16 | |
| 17 | struct nlist *symtab; |
| 18 | char nullname[] = {0,0,0,0,0,0,0,0,0}; /* a few 0 bytes */ |
| 19 | off_t stoff; |
| 20 | |
| 21 | stread(buff, nbytes) |
| 22 | struct nlist *buff; |
| 23 | int nbytes; |
| 24 | { |
| 25 | register int from = stoff; |
| 26 | |
| 27 | stoff += nbytes; |
| 28 | if (stoff >= gstart) |
| 29 | return (-1); |
| 30 | if (nbytes < 0) { |
| 31 | from = stoff; |
| 32 | buff--; |
| 33 | } |
| 34 | from = (from - ststart); |
| 35 | *buff = symtab[from/sizeof (struct nlist)]; |
| 36 | return (sizeof (struct nlist)); |
| 37 | } |
| 38 | |
| 39 | stseek(off, rel) |
| 40 | long off; |
| 41 | { |
| 42 | |
| 43 | if (rel == 1) |
| 44 | stoff += off; |
| 45 | else |
| 46 | stoff = off; |
| 47 | } |
| 48 | #define bread(a,b,c) stread(b,c) |
| 49 | #define blseek(a,b,c) stseek(b,c) |
| 50 | #endif |
| 51 | |
| 52 | /* initialize file and procedure tables */ |
| 53 | initfp() { |
| 54 | struct nlist stentry; |
| 55 | register struct proct *procp; |
| 56 | register struct filet *filep; |
| 57 | struct stat stbuf; |
| 58 | |
| 59 | long soffset; |
| 60 | int i, gflag = 0; |
| 61 | u_char class; |
| 62 | register char *p, *q; |
| 63 | |
| 64 | #ifdef FLEXNAMES |
| 65 | register struct nlist *sp; |
| 66 | int malformed = 0; |
| 67 | lseek(txtmap.ufd, gstart, 0); |
| 68 | if (read(txtmap.ufd, &ssiz, sizeof(ssiz)) != sizeof (ssiz)) { |
| 69 | printf("%s: no string table (old format?)\n", symfil); |
| 70 | exit(1); |
| 71 | } |
| 72 | strtab = (char *)malloc(ssiz); |
| 73 | if (strtab == 0) { |
| 74 | printf("no room for %d bytes of string table\n", ssiz); |
| 75 | exit(1); |
| 76 | } |
| 77 | ssiz -= sizeof (ssiz); |
| 78 | if (read(txtmap.ufd, strtab+sizeof (ssiz), ssiz) != ssiz) { |
| 79 | printf("%s: error reading string table\n", symfil); |
| 80 | exit(1); |
| 81 | } |
| 82 | i = gstart - ststart; |
| 83 | symtab = (struct nlist *)malloc(i); |
| 84 | if (symtab == 0) { |
| 85 | printf("no room for %d bytes of symbol table\n", i); |
| 86 | exit(1); |
| 87 | } |
| 88 | lseek(txtmap.ufd, ststart, 0); |
| 89 | if (read(txtmap.ufd, symtab, i) != i) { |
| 90 | printf("%s: error reading symbol table\n", symfil); |
| 91 | exit(1); |
| 92 | } |
| 93 | for (sp = &symtab[i/sizeof (struct nlist)]; --sp >= symtab; ) |
| 94 | if (sp->n_un.n_strx != 0) { |
| 95 | if (sp->n_un.n_strx < sizeof (ssiz) || sp->n_un.n_strx >= ssiz) { |
| 96 | if (malformed == 0) { |
| 97 | printf("danger: mangled symbol table\n"); |
| 98 | malformed = 1; |
| 99 | } |
| 100 | sp->n_un.n_name = nullname; |
| 101 | } else |
| 102 | sp->n_un.n_name = strtab + sp->n_un.n_strx; |
| 103 | } else |
| 104 | sp->n_un.n_name = nullname; |
| 105 | #endif |
| 106 | #ifndef VMUNIX |
| 107 | sbuf.fd = txtmap.ufd; |
| 108 | #endif |
| 109 | firstdata = MAXPOS; |
| 110 | soffset = ststart; |
| 111 | blseek(&sbuf,ststart,0); |
| 112 | filep = files = badfile = (struct filet *) sbrk(sizeof filep[0]); |
| 113 | procp = procs = badproc = (struct proct *) sbrk(sizeof procp[0]); |
| 114 | |
| 115 | for(;;) { |
| 116 | if (bread(&sbuf, &stentry, sizeof stentry) < |
| 117 | sizeof stentry) break; |
| 118 | class = stentry.n_type & STABMASK; |
| 119 | switch (class & STABMASK) { |
| 120 | case N_SO: |
| 121 | case N_SOL: |
| 122 | gflag++; |
| 123 | if (filep == badfile) { |
| 124 | p = sbrk(FILEINCR*sizeof filep[0]); |
| 125 | if (p < 0) { |
| 126 | perror("sdb"); |
| 127 | exit(4); |
| 128 | } |
| 129 | q = p + FILEINCR*sizeof filep[0]; |
| 130 | while (p > (char *) procs) |
| 131 | *--q = *--p; |
| 132 | badfile += FILEINCR; |
| 133 | procp = (struct proct *) |
| 134 | ((char *) procp + |
| 135 | FILEINCR*sizeof filep[0]); |
| 136 | procs = (struct proct *) |
| 137 | ((char *) procs + |
| 138 | FILEINCR*sizeof filep[0]); |
| 139 | badproc = (struct proct *) |
| 140 | ((char *)badproc + |
| 141 | FILEINCR*sizeof filep[0]); |
| 142 | } |
| 143 | filep->faddr = stentry.n_value; |
| 144 | filep->lineflag = (class == N_SOL); |
| 145 | filep->stf_offset = soffset; |
| 146 | #ifndef FLEXNAMES |
| 147 | p = filep->sfilename; |
| 148 | for (;;) { |
| 149 | for (i=0; i<8; i++) *p++ = stentry.n_un.n_name[i]; |
| 150 | if (*(p-1) == '\0') break; |
| 151 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 152 | < sizeof stentry) |
| 153 | error("Bad N_SO entry (1)"); |
| 154 | if ((stentry.n_type & STABMASK) != class) |
| 155 | error("Bad N_SO entry (2)"); |
| 156 | soffset += sizeof stentry; |
| 157 | } |
| 158 | #else |
| 159 | filep->sfilename = stentry.n_un.n_name; |
| 160 | #endif |
| 161 | q = filep->sfilename; |
| 162 | for (p=fp; *q; *p++ = *q++) ; |
| 163 | *p = 0; |
| 164 | if (stat(filework, &stbuf) == -1) |
| 165 | printf("Warning: `%s' not found\n", |
| 166 | filep->sfilename); |
| 167 | else if (stbuf.st_mtime > symtime) |
| 168 | printf("Warning: `%s' newer than `%s'\n", |
| 169 | filep->sfilename, |
| 170 | symfil); |
| 171 | filep++; |
| 172 | break; |
| 173 | |
| 174 | case N_TEXT: |
| 175 | if (stentry.n_un.n_name[0] != '_') break; |
| 176 | case N_FUN: |
| 177 | case N_ENTRY: |
| 178 | if (procp == badproc) { |
| 179 | if (sbrk(PROCINCR*sizeof procp[0]) < 0) { |
| 180 | perror("sdb"); |
| 181 | exit(4); |
| 182 | } |
| 183 | badproc += PROCINCR; |
| 184 | } |
| 185 | #ifndef FLEXNAMES |
| 186 | for(i=0; i<8; i++) |
| 187 | procp->pname[i] = stentry.n_un.n_name[i]; |
| 188 | #else |
| 189 | procp->pname = stentry.n_un.n_name; |
| 190 | #endif |
| 191 | procp->paddr = stentry.n_value; |
| 192 | procp->st_offset = soffset; |
| 193 | procp->sfptr = (class != N_TEXT) ? filep - 1 : badfile; |
| 194 | procp->lineno = (class != N_TEXT) ? stentry.n_desc : 0; |
| 195 | procp->entrypt = (class & STABMASK) == N_ENTRY; |
| 196 | procp++; |
| 197 | break; |
| 198 | } |
| 199 | if (stentry.n_type & N_EXT) { |
| 200 | if (!extstart) |
| 201 | extstart = soffset; |
| 202 | if (stentry.n_type == N_DATA | N_EXT || |
| 203 | stentry.n_type == N_BSS | N_EXT || |
| 204 | stentry.n_value < firstdata) |
| 205 | firstdata = stentry.n_value; |
| 206 | } |
| 207 | soffset += sizeof stentry; |
| 208 | } |
| 209 | qsort(procs, procp-procs, sizeof procs[0], compar); |
| 210 | badproc->st_offset = badfile->stf_offset = soffset; |
| 211 | badproc->sfptr = procp->sfptr = badfile; |
| 212 | #ifndef FLEXNAMES |
| 213 | badproc->pname[0] = badfile->sfilename[0]= |
| 214 | procp->pname[0] = filep->sfilename[0] = '\0'; |
| 215 | #else |
| 216 | badproc->pname = badfile->sfilename= |
| 217 | procp->pname = filep->sfilename = nullname; |
| 218 | #endif |
| 219 | |
| 220 | if (!gflag) |
| 221 | printf("Warning: `%s' not compiled with -g\n", symfil); |
| 222 | setcur(1); |
| 223 | } |
| 224 | |
| 225 | /* returns current procedure from state (curfile, fline) */ |
| 226 | struct proct * |
| 227 | curproc() { |
| 228 | register ADDR addr; |
| 229 | |
| 230 | addr = getaddr("", fline ? fline : 1); |
| 231 | if (addr == -1) return(badproc); |
| 232 | return(adrtoprocp(addr)); |
| 233 | |
| 234 | } |
| 235 | |
| 236 | /* returns procedure s, uses curproc() if s == NULL */ |
| 237 | |
| 238 | struct proct * |
| 239 | findproc(s) |
| 240 | char *s; { |
| 241 | register struct proct *p, *altproc; |
| 242 | |
| 243 | if (s[0] == '\0') return(curproc()); |
| 244 | altproc = badproc; |
| 245 | |
| 246 | for (p=procs; p->pname[0]; p++) { |
| 247 | if (eqpat(s, p->pname)) return(p); |
| 248 | if (p->pname[0] == '_' && eqpatr(s, p->pname+1, 1)) |
| 249 | altproc = p; |
| 250 | } |
| 251 | return(altproc); |
| 252 | } |
| 253 | |
| 254 | /* returns file s containing filename */ |
| 255 | struct filet * |
| 256 | findfile(s) |
| 257 | char *s; { |
| 258 | register struct filet *f; |
| 259 | if (s == 0 || *s == 0) |
| 260 | return(files); /* start at beginning if no cur file */ |
| 261 | for (f=files; f->sfilename[0]; f++) { |
| 262 | if (eqpat(f->sfilename, s)) { |
| 263 | for( ; f->lineflag; f--) ; |
| 264 | if (f < files) error("Bad file array"); |
| 265 | return(f); |
| 266 | } |
| 267 | } |
| 268 | return(f); |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * slookup(): |
| 273 | * looks up variable matching pat starting at (offset + sizeof stentry) |
| 274 | * in a.out, searching backwards, |
| 275 | * ignoring nested blocks to beginning to procedure. |
| 276 | * Returns its offset and symbol table entries decoded in sl_* |
| 277 | * |
| 278 | * If comblk == "*" then match both within and outside common blocks, |
| 279 | * if comblk == "" then match only outside common blocks, |
| 280 | * else match only within comblk. |
| 281 | */ |
| 282 | |
| 283 | long |
| 284 | slookup(pat, poffset, stelt) |
| 285 | long poffset; char *pat; { |
| 286 | slookinit(); |
| 287 | slooknext(pat, poffset, stelt, "*"); |
| 288 | } |
| 289 | |
| 290 | int clevel, level, fnameflag, comfound, incomm; |
| 291 | |
| 292 | slookinit() { |
| 293 | clevel = level = fnameflag = comfound = incomm = 0; |
| 294 | } |
| 295 | |
| 296 | long |
| 297 | slooknext(pat, poffset, stelt, comblk) |
| 298 | long poffset; char *pat, *comblk; { |
| 299 | register int i; |
| 300 | register long offset; |
| 301 | char *q; |
| 302 | u_char class; |
| 303 | struct nlist stentry; |
| 304 | struct proct *procp, *p; |
| 305 | |
| 306 | offset = poffset + sizeof stentry; |
| 307 | if (debug) printf("slookup(%s,%d)\n",pat,offset); |
| 308 | blseek(&sbuf, offset, 0); |
| 309 | |
| 310 | for (;;) { |
| 311 | offset -= sizeof stentry; |
| 312 | if (offset < ststart) break; |
| 313 | if (bread(&sbuf, &stentry+1, -sizeof stentry) |
| 314 | < sizeof stentry) break; |
| 315 | class = stentry.n_type & STABMASK; |
| 316 | switch (class & STABMASK) { |
| 317 | case 0: |
| 318 | break; |
| 319 | case N_FUN: |
| 320 | return(-1); |
| 321 | case N_RBRAC: |
| 322 | level++; |
| 323 | break; |
| 324 | case N_LBRAC: |
| 325 | level--; |
| 326 | break; |
| 327 | case N_ECOMM: |
| 328 | i = 0; |
| 329 | #ifndef FLEXNAMES |
| 330 | for (q = &stentry.n_un.n_name[7]; q>=stentry.n_un.n_name; q--) { |
| 331 | if (*q == '_') { |
| 332 | *q = '\0'; |
| 333 | i++; |
| 334 | break; |
| 335 | } |
| 336 | } |
| 337 | #else |
| 338 | for (q = stentry.n_un.n_name; *q; q++) |
| 339 | continue; |
| 340 | if (*--q == '_') |
| 341 | *q = 0, i++; |
| 342 | #endif |
| 343 | if (eqpat(comblk, stentry.n_un.n_name)) |
| 344 | comfound = 1; |
| 345 | if (i) |
| 346 | *q = '_'; |
| 347 | incomm = 1; |
| 348 | case N_ECOML: |
| 349 | clevel++; |
| 350 | break; |
| 351 | case N_BCOMM: |
| 352 | comfound = incomm = 0; |
| 353 | clevel--; |
| 354 | break; |
| 355 | case N_FNAME: |
| 356 | if (fnameflag) |
| 357 | break; |
| 358 | procp = findproc(stentry.n_un.n_name); |
| 359 | for (p=procs; p->pname[0]; p++) { |
| 360 | if (p->entrypt == 0 && |
| 361 | p->st_offset > procp->st_offset && |
| 362 | p->st_offset < offset) |
| 363 | offset = p->st_offset; |
| 364 | } |
| 365 | clevel = level = 0; |
| 366 | fnameflag++; |
| 367 | blseek(&sbuf, offset, 0); |
| 368 | break; |
| 369 | default: |
| 370 | if (level <= 0 && eqpat(pat, stentry.n_un.n_name) && |
| 371 | stentry.n_un.n_name[0] && class & STABTYPES && |
| 372 | (eqstr("*", comblk) || |
| 373 | (comblk[0] == '\0' && incomm == 0) || |
| 374 | comfound) && |
| 375 | (stelt == (class == N_SSYM))) { |
| 376 | if (class == N_LENG) { |
| 377 | sl_size = stentry.n_value; |
| 378 | offset -= sizeof stentry; |
| 379 | bread(&sbuf, &stentry+1, |
| 380 | -sizeof stentry); |
| 381 | if (stentry.n_type&~N_EXT == N_BSS) { |
| 382 | bread(&sbuf, &stentry+1, |
| 383 | -sizeof stentry); |
| 384 | offset -= sizeof stentry; |
| 385 | } |
| 386 | } |
| 387 | else sl_size = 0; |
| 388 | sl_class = stentry.n_type & STABMASK; |
| 389 | sl_type = stentry.n_desc; |
| 390 | sl_addr = stentry.n_value; |
| 391 | #ifndef FLEXNAMES |
| 392 | for (i=0; i<8; i++) sl_name[i] = |
| 393 | stentry.n_un.n_name[i]; |
| 394 | #else |
| 395 | sl_name = stentry.n_un.n_name; |
| 396 | #endif |
| 397 | if (clevel != 0) docomm(offset); |
| 398 | return(offset - sizeof stentry); |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | return(-1); |
| 403 | } |
| 404 | |
| 405 | /* |
| 406 | * Look up global variable matching pat starting at (filestart+sizeof stentry) |
| 407 | * Return its offset and symbol table entries decoded in sl_* |
| 408 | */ |
| 409 | long |
| 410 | globallookup(pat, filestart, stelt) |
| 411 | char *pat; long filestart; { |
| 412 | register int offset, i; |
| 413 | struct nlist stentry; |
| 414 | int clevel; |
| 415 | u_char class; |
| 416 | |
| 417 | if (debug) printf("globallookup(%s,%d)\n", pat,filestart); |
| 418 | blseek(&sbuf, filestart, 0); |
| 419 | offset = filestart - sizeof stentry; |
| 420 | clevel = 0; |
| 421 | do { |
| 422 | if (bread(&sbuf, &stentry, sizeof stentry) < |
| 423 | sizeof stentry) return(-1); |
| 424 | offset += sizeof stentry; |
| 425 | } while ((stentry.n_type & STABMASK) == N_SO); |
| 426 | for (;;) { |
| 427 | class = stentry.n_type & STABMASK; |
| 428 | switch (class & STABMASK) { |
| 429 | case N_SO: |
| 430 | return(-1); |
| 431 | case N_ECOMM: |
| 432 | clevel--; |
| 433 | break; |
| 434 | case N_BCOMM: |
| 435 | clevel++; |
| 436 | break; |
| 437 | default: |
| 438 | if (eqpat(pat, stentry.n_un.n_name) |
| 439 | && stentry.n_un.n_name[0] && class & STABTYPES) { |
| 440 | sl_class = stentry.n_type & STABMASK; |
| 441 | if (sl_class != N_GSYM && sl_class != N_SSYM && |
| 442 | sl_class != N_STSYM && sl_class != N_LCSYM) goto g1; |
| 443 | if (stelt != (sl_class == N_SSYM)) goto g1; |
| 444 | sl_size = 0; |
| 445 | sl_type = stentry.n_desc; |
| 446 | sl_addr = stentry.n_value; |
| 447 | #ifndef FLEXNAMES |
| 448 | for (i=0; i<8; i++) sl_name[i] = stentry.n_un.n_name[i]; |
| 449 | #else |
| 450 | sl_name = stentry.n_un.n_name; |
| 451 | #endif |
| 452 | if (clevel != 0) docomm(offset); |
| 453 | goto g2; |
| 454 | } |
| 455 | } |
| 456 | g1: if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) |
| 457 | return(-1); |
| 458 | offset += sizeof stentry; |
| 459 | } |
| 460 | g2: bread(&sbuf, &stentry, sizeof stentry); |
| 461 | if (stentry.n_type&~N_EXT==N_BSS) { |
| 462 | bread(&sbuf, &stentry, sizeof stentry); |
| 463 | offset += sizeof stentry; |
| 464 | } |
| 465 | if (((stentry.n_type & STABMASK) == N_LENG) && |
| 466 | (eqpat(sl_name, stentry.n_un.n_name))) |
| 467 | sl_size = stentry.n_value; |
| 468 | |
| 469 | if (sl_class == N_GSYM && (clevel == 0)) { |
| 470 | blseek(&sbuf, extstart, 0); |
| 471 | for(;;) { |
| 472 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 473 | < sizeof stentry) |
| 474 | return(-1); |
| 475 | if (stentry.n_un.n_name[0] != '_') continue; |
| 476 | if (eqpatr(sl_name, stentry.n_un.n_name+1, 1)) { |
| 477 | sl_addr = stentry.n_value; |
| 478 | break; |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | return(offset + sizeof stentry); |
| 483 | } |
| 484 | |
| 485 | /* core address to procedure (pointer to proc array) */ |
| 486 | struct proct * |
| 487 | adrtoprocp(addr) |
| 488 | ADDR addr; { |
| 489 | register struct proct *procp, *lastproc; |
| 490 | lastproc = badproc; |
| 491 | for (procp=procs; procp->pname[0]; procp++) { |
| 492 | if (procp->paddr > addr) break; |
| 493 | if (procp->entrypt == 0) |
| 494 | lastproc = procp; |
| 495 | } |
| 496 | return (lastproc); |
| 497 | } |
| 498 | |
| 499 | |
| 500 | /* core address to file (pointer to file array) */ |
| 501 | struct filet * |
| 502 | adrtofilep(addr) |
| 503 | ADDR addr; { |
| 504 | register struct filet *filep; |
| 505 | for (filep=files; filep->sfilename[0]; filep++) { |
| 506 | if (filep->faddr > addr) break; |
| 507 | } |
| 508 | return (filep != files ? filep-1 : badfile); |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * core address to linenumber |
| 513 | * Sets external exactaddr to addr if addr is NOT the first instruction |
| 514 | * of a line, set to -1 otherwise. |
| 515 | * Sets external lnfaddr to address of first statement in line. |
| 516 | */ |
| 517 | long lastoffset; |
| 518 | |
| 519 | adrtolineno(addr) |
| 520 | ADDR addr; { |
| 521 | register int lineno; |
| 522 | long offset; |
| 523 | struct nlist stentry; |
| 524 | |
| 525 | exactaddr = addr; |
| 526 | lineno = lastoffset = -1; |
| 527 | offset = adrtoprocp(addr)->st_offset; |
| 528 | blseek(&sbuf, offset, 0); |
| 529 | for (;;) { |
| 530 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 531 | < sizeof stentry) break; |
| 532 | if (stentry.n_type == N_SO) |
| 533 | break; |
| 534 | if (stentry.n_type == N_SLINE) { |
| 535 | if (stentry.n_value > addr) |
| 536 | break; |
| 537 | lastoffset = offset; |
| 538 | lineno = stentry.n_desc; |
| 539 | lnfaddr = stentry.n_value; |
| 540 | if (stentry.n_value == addr) |
| 541 | exactaddr = -1; |
| 542 | } |
| 543 | offset += sizeof stentry; |
| 544 | } |
| 545 | return (lineno); |
| 546 | } |
| 547 | |
| 548 | |
| 549 | /* address to a.out offset */ |
| 550 | long |
| 551 | adrtostoffset(addr) |
| 552 | ADDR addr; { |
| 553 | adrtolineno(addr); |
| 554 | return(lastoffset); |
| 555 | } |
| 556 | |
| 557 | |
| 558 | /* |
| 559 | * Set (curfile, lineno) from core image. |
| 560 | * Returns 1 if there is a core image, 0 otherwise. |
| 561 | * |
| 562 | * Print the current line iff verbose is set. |
| 563 | */ |
| 564 | setcur(verbose) { |
| 565 | register struct proct *procp; |
| 566 | |
| 567 | dot = *(ADDR *) (((ADDR) &u) + PC); |
| 568 | |
| 569 | if (dot == 0) { |
| 570 | printf("No core image\n"); |
| 571 | goto setmain; |
| 572 | } |
| 573 | procp = adrtoprocp(dot); |
| 574 | if ((procp->sfptr) != badfile) { |
| 575 | finit(adrtofilep(procp->paddr)->sfilename); |
| 576 | ffind(adrtolineno(dot)); |
| 577 | if (verbose) { |
| 578 | if (exactaddr != -1) |
| 579 | printf("0x%x in ", exactaddr); |
| 580 | #ifndef FLEXNAMES |
| 581 | printf("%.8s:", procp->pname); |
| 582 | #else |
| 583 | printf("%s:", procp->pname); |
| 584 | #endif |
| 585 | fprint(); |
| 586 | } |
| 587 | return(1); |
| 588 | } |
| 589 | if (verbose) { |
| 590 | if (procp->pname[0] == '_') |
| 591 | #ifndef FLEXNAMES |
| 592 | printf("%.7s: address 0x%x\n", procp->pname+1, dot); |
| 593 | #else |
| 594 | printf("%s: address 0x%x\n", procp->pname+1, dot); |
| 595 | #endif |
| 596 | else |
| 597 | #ifndef FLEXNAMES |
| 598 | printf("%.8s: address %d\n", procp->pname, dot); |
| 599 | #else |
| 600 | printf("%s: address %d\n", procp->pname, dot); |
| 601 | #endif |
| 602 | } |
| 603 | |
| 604 | setmain: |
| 605 | procp = findproc("MAIN_"); |
| 606 | if ((procp->pname[0] != 'M') || (procp->sfptr == badfile)) { |
| 607 | procp = findproc("main"); |
| 608 | if ((procp->pname[0] != 'm') || (procp->sfptr == badfile)) { |
| 609 | /* printf("main not compiled with debug flag\n"); */ |
| 610 | return(0); |
| 611 | } |
| 612 | } |
| 613 | finit(procp->sfptr->sfilename); |
| 614 | ffind(procp->lineno); |
| 615 | return(0); |
| 616 | } |
| 617 | |
| 618 | compar(a, b) |
| 619 | struct proct *a, *b; { |
| 620 | if (a->paddr == b->paddr) { |
| 621 | if (a->pname[0] == '_') return(-1); |
| 622 | if (b->pname[0] == '_') return(1); |
| 623 | return(0); |
| 624 | } |
| 625 | return(a->paddr < b->paddr ? -1 : 1); |
| 626 | } |
| 627 | |
| 628 | /* gets offset of file or procedure named s */ |
| 629 | nametooffset(s) |
| 630 | char *s; { |
| 631 | register struct filet *f; |
| 632 | register struct proct *p; |
| 633 | |
| 634 | if (*s == '\0') |
| 635 | return(-1); |
| 636 | if (eqany('.', s)) { |
| 637 | f = findfile(s); |
| 638 | return(f->sfilename[0] ? f->stf_offset : -1); |
| 639 | } |
| 640 | p = findproc(s); |
| 641 | return(p->pname[0] ? p->st_offset : -1); |
| 642 | } |
| 643 | |
| 644 | /* returns s if its a filename, its file otherwise */ |
| 645 | char * |
| 646 | nametofile(s) |
| 647 | char *s; { |
| 648 | register struct proct *p; |
| 649 | |
| 650 | if (eqany('.', s)) { |
| 651 | return(s); |
| 652 | } |
| 653 | p = findproc(s); |
| 654 | return(adrtofilep(p->paddr)->sfilename); |
| 655 | } |
| 656 | |
| 657 | |
| 658 | /* line number to address, starting at offset in a.out */ |
| 659 | /* assumes that offset is within file */ |
| 660 | lntoaddr(lineno, offset, file) |
| 661 | long offset; char *file; { |
| 662 | struct nlist stentry; |
| 663 | register int i, ignore = 0; |
| 664 | register int bestln=BIGNUM; |
| 665 | ADDR bestaddr; |
| 666 | char *p; |
| 667 | |
| 668 | blseek(&sbuf, offset, 0); |
| 669 | |
| 670 | do { |
| 671 | if (bread(&sbuf, &stentry, sizeof stentry) < |
| 672 | sizeof stentry) return(-1); |
| 673 | } while ((stentry.n_type & STABMASK) == N_SO); |
| 674 | for (;;) { |
| 675 | switch(stentry.n_type & STABMASK) { |
| 676 | case N_SLINE: |
| 677 | if (!ignore) { |
| 678 | if (stentry.n_desc == lineno) |
| 679 | return(stentry.n_value); |
| 680 | if (stentry.n_desc > lineno && |
| 681 | stentry.n_desc < bestln) { |
| 682 | bestln = stentry.n_desc; |
| 683 | bestaddr = stentry.n_value; |
| 684 | } |
| 685 | } |
| 686 | break; |
| 687 | |
| 688 | case N_SO: |
| 689 | goto ret; |
| 690 | |
| 691 | case N_SOL: |
| 692 | p = file; |
| 693 | #ifndef FLEXNAMES |
| 694 | for (;;) { |
| 695 | for (i=0; i<8; i++) { |
| 696 | if (*p != stentry.n_un.n_name[i]) goto neq; |
| 697 | if (*p++ == '\0') break; |
| 698 | } |
| 699 | if (stentry.n_un.n_name[7] == '\0') |
| 700 | break; |
| 701 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 702 | < sizeof stentry) |
| 703 | error("Bad N_SO entry (1)"); |
| 704 | if ((stentry.n_type & STABMASK) != (u_char)N_SOL) |
| 705 | error("Bad N_SO entry (2)"); |
| 706 | } |
| 707 | #else |
| 708 | if (strcmp(file, stentry.n_un.n_name)) |
| 709 | goto neq; |
| 710 | #endif |
| 711 | ignore = 0; |
| 712 | break; |
| 713 | |
| 714 | neq: ignore++; |
| 715 | break; |
| 716 | } |
| 717 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) |
| 718 | break; |
| 719 | } |
| 720 | ret: return(bestln == BIGNUM ? -1 : bestaddr); |
| 721 | } |
| 722 | |
| 723 | /* gets address of proc:number */ |
| 724 | getaddr(proc,integ) |
| 725 | char *proc; { |
| 726 | register long offset; |
| 727 | register char *s, *f; |
| 728 | ADDR addr; |
| 729 | |
| 730 | s = proc[0] ? proc : curfile; |
| 731 | if (*s == '\0') |
| 732 | return(-1); |
| 733 | offset = nametooffset(s); |
| 734 | f = nametofile(s); |
| 735 | if (debug) printf("getaddr() computed offset %d", offset); |
| 736 | if (offset == -1) { |
| 737 | addr = extaddr(proc); |
| 738 | if (addr != -1) addr += 2; /* MACHINE DEPENDENT */ |
| 739 | if (debug) printf(" extaddr computed %d\n", addr); |
| 740 | return(addr); |
| 741 | } |
| 742 | if (integ) |
| 743 | addr = lntoaddr(integ, offset, s); |
| 744 | else { |
| 745 | ADDR oldaddr; |
| 746 | oldaddr = findproc(proc)->paddr + 2; /* MACHINE DEPENDENT */ |
| 747 | addr = lntoaddr(adrtolineno(addr)+1, offset, f); |
| 748 | if (addr == -1) |
| 749 | addr = oldaddr; |
| 750 | } |
| 751 | if (debug) printf(" and addr %d\n", addr); |
| 752 | if (addr == -1) return(-1); |
| 753 | return(addr); |
| 754 | } |
| 755 | |
| 756 | /* returns address of external */ |
| 757 | ADDR |
| 758 | extaddr(name) |
| 759 | char *name; { |
| 760 | struct nlist stentry; |
| 761 | blseek(&sbuf, extstart, 0); |
| 762 | |
| 763 | for (;;) { |
| 764 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) |
| 765 | return(-1); |
| 766 | if (stentry.n_un.n_name[0] == '_' && |
| 767 | eqpatr(name, stentry.n_un.n_name+1, 1)) |
| 768 | return(stentry.n_value); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | |
| 773 | /* |
| 774 | * Look up external data symbol matching pat starting at |
| 775 | * (filestart+sizeof stentry) |
| 776 | * Return its address in sl_addr and name in sl_name. |
| 777 | */ |
| 778 | long |
| 779 | extlookup(pat, filestart) |
| 780 | char *pat; long filestart; { |
| 781 | register int offset, i; |
| 782 | struct nlist stentry; |
| 783 | |
| 784 | blseek(&sbuf, filestart, 0); |
| 785 | offset = filestart - sizeof stentry; |
| 786 | do { |
| 787 | if (bread(&sbuf, &stentry, sizeof stentry) < |
| 788 | sizeof stentry) return(-1); |
| 789 | offset += sizeof stentry; |
| 790 | } while ((stentry.n_type & STABMASK) == N_SO); |
| 791 | for (;;) { |
| 792 | if (stentry.n_un.n_name[0] == '_' && |
| 793 | stentry.n_type == (N_DATA | N_EXT) && |
| 794 | eqpatr(pat, stentry.n_un.n_name+1, 1)) { |
| 795 | sl_addr = stentry.n_value; |
| 796 | #ifndef FLEXNAMES |
| 797 | for (i=0; i<7; i++) sl_name[i] = stentry.n_un.n_name[i+1]; |
| 798 | #else |
| 799 | sl_name = stentry.n_un.n_name; |
| 800 | #endif |
| 801 | return(offset + sizeof stentry); |
| 802 | } |
| 803 | g1: if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) |
| 804 | return(-1); |
| 805 | offset += sizeof stentry; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* find enclosing common blocks and fix up addresses */ |
| 810 | docomm(offset) |
| 811 | long offset; { |
| 812 | struct nlist stentry; |
| 813 | ADDR addr; |
| 814 | |
| 815 | for (;;) { |
| 816 | if (bread(&sbuf, &stentry, sizeof stentry) < sizeof stentry) { |
| 817 | error("Bad common block"); |
| 818 | return; |
| 819 | } |
| 820 | sl_class = N_GSYM; |
| 821 | if ((stentry.n_type & STABMASK) == N_ECOMM) { |
| 822 | addr = extaddr(stentry.n_un.n_name); |
| 823 | if (addr == -1) |
| 824 | error("Lost common block"); |
| 825 | sl_addr +=addr; |
| 826 | blseek(&sbuf, offset, 0); |
| 827 | return; |
| 828 | } |
| 829 | if ((stentry.n_type & STABMASK) == N_ECOML) { |
| 830 | sl_addr += stentry.n_value; |
| 831 | blseek(&sbuf, offset, 0); |
| 832 | return; |
| 833 | } |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | /* determine if class is that of a variable */ |
| 838 | char pctypes[] = {N_GSYM, N_STSYM, N_LCSYM, N_RSYM, N_SSYM, N_LSYM, |
| 839 | N_PSYM, 0}; |
| 840 | varclass(class) |
| 841 | u_char class; { |
| 842 | char *p; |
| 843 | |
| 844 | for (p=pctypes; *p; p++) { |
| 845 | if (class == *p) |
| 846 | return(1); |
| 847 | } |
| 848 | return(0); |
| 849 | } |
| 850 | |
| 851 | /* |
| 852 | * address to external name |
| 853 | * returns difference between addr and address of external |
| 854 | * name returned in sl_name |
| 855 | */ |
| 856 | adrtoext(addr) |
| 857 | ADDR addr; { |
| 858 | struct nlist stentry; |
| 859 | register int i, prevdiff = MAXPOS, diff; |
| 860 | |
| 861 | blseek(&sbuf, extstart, 0); |
| 862 | for (;;) { |
| 863 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 864 | < sizeof stentry) |
| 865 | return (prevdiff!=MAXPOS ? prevdiff : -1); |
| 866 | if (stentry.n_type == (N_DATA | N_EXT) || |
| 867 | stentry.n_type == (N_BSS | N_EXT)) { |
| 868 | diff = addr - stentry.n_value; |
| 869 | if (diff >= 0 && diff < prevdiff) { |
| 870 | #ifndef FLEXNAMES |
| 871 | for (i=0; i<7; i++) |
| 872 | sl_name[i] = stentry.n_un.n_name[i+1]; |
| 873 | #else |
| 874 | sl_name = stentry.n_un.n_name; |
| 875 | #endif |
| 876 | if (diff == 0) |
| 877 | return(0); |
| 878 | prevdiff = diff; |
| 879 | } |
| 880 | } |
| 881 | } |
| 882 | } |
| 883 | |
| 884 | /* |
| 885 | * address to local name in procp |
| 886 | * returns difference between addr and address of local |
| 887 | * returned in sl_name |
| 888 | */ |
| 889 | adrtolocal(addr, procp) |
| 890 | ADDR addr; struct proct *procp; { |
| 891 | struct nlist stentry; |
| 892 | register int i, prevdiff = MAXPOS, diff; |
| 893 | |
| 894 | blseek(&sbuf, procp->st_offset + sizeof stentry, 0); |
| 895 | for (;;) { |
| 896 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 897 | < sizeof stentry) |
| 898 | return(prevdiff!=MAXPOS ? prevdiff : -1); |
| 899 | if (stentry.n_type == N_FUN) |
| 900 | return(prevdiff!=MAXPOS ? prevdiff : -1); |
| 901 | if (stentry.n_type == N_LSYM) { |
| 902 | diff = addr - stentry.n_value; |
| 903 | if (diff >= 0 && diff < prevdiff) { |
| 904 | #ifndef FLEXNAMES |
| 905 | for (i=0; i<8; i++) |
| 906 | sl_name[i] = stentry.n_un.n_name[i]; |
| 907 | #else |
| 908 | sl_name = stentry.n_un.n_name; |
| 909 | #endif |
| 910 | if (diff == 0) |
| 911 | return(0); |
| 912 | prevdiff = diff; |
| 913 | } |
| 914 | } |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | /* |
| 919 | * address to parameter name in procp |
| 920 | * returns difference between addr and address of local |
| 921 | * returned in sl_name |
| 922 | */ |
| 923 | adrtoparam(addr, procp) |
| 924 | ADDR addr; struct proct *procp; { |
| 925 | struct nlist stentry; |
| 926 | register int i, prevdiff = MAXPOS, diff; |
| 927 | |
| 928 | blseek(&sbuf, procp->st_offset + sizeof stentry, 0); |
| 929 | for (;;) { |
| 930 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 931 | < sizeof stentry) |
| 932 | return(prevdiff!=MAXPOS ? prevdiff : -1); |
| 933 | if (stentry.n_type == N_FUN) |
| 934 | return(prevdiff!=MAXPOS ? prevdiff : -1); |
| 935 | if (stentry.n_type == N_PSYM) { |
| 936 | diff = addr - stentry.n_value; |
| 937 | if (diff >= 0 && diff < prevdiff) { |
| 938 | #ifndef FLEXNAMES |
| 939 | for (i=0; i<8; i++) |
| 940 | sl_name[i] = stentry.n_un.n_name[i]; |
| 941 | #else |
| 942 | sl_name = stentry.n_un.n_name; |
| 943 | #endif |
| 944 | if (diff == 0) |
| 945 | return(0); |
| 946 | prevdiff = diff; |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | /* |
| 953 | * register number to register variable name in procp |
| 954 | * returned in sl_name |
| 955 | */ |
| 956 | adrtoregvar(regno, procp) |
| 957 | ADDR regno; struct proct *procp; { |
| 958 | struct nlist stentry; |
| 959 | register int i; |
| 960 | |
| 961 | blseek(&sbuf, procp->st_offset + sizeof stentry, 0); |
| 962 | for (;;) { |
| 963 | if (bread(&sbuf, &stentry, sizeof stentry) |
| 964 | < sizeof stentry) return(-1); |
| 965 | if (stentry.n_type == N_FUN) |
| 966 | return(-1); |
| 967 | if (stentry.n_type == N_RSYM) { |
| 968 | if (stentry.n_value == regno) { |
| 969 | #ifndef FLEXNAMES |
| 970 | for (i=0; i<8; i++) |
| 971 | sl_name[i] = stentry.n_un.n_name[i]; |
| 972 | #else |
| 973 | sl_name = stentry.n_un.n_name; |
| 974 | #endif |
| 975 | return(0); |
| 976 | } |
| 977 | } |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | /* sets file map for M command */ |
| 982 | setmap(s) |
| 983 | char *s; { |
| 984 | union { |
| 985 | MAP *m; |
| 986 | L_INT *mp; |
| 987 | } amap; |
| 988 | int starflag = 0; |
| 989 | |
| 990 | amap.mp = 0; |
| 991 | for (; *s; s++) { |
| 992 | switch (*s) { |
| 993 | case '/': |
| 994 | amap.m = &datmap; |
| 995 | break; |
| 996 | case '?': |
| 997 | amap.m = &txtmap; |
| 998 | break; |
| 999 | case '*': |
| 1000 | starflag++; |
| 1001 | break; |
| 1002 | default: |
| 1003 | goto sout; |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | sout: if (amap.mp == 0) { |
| 1008 | error("Map `?' or `/' must be specified"); |
| 1009 | return; |
| 1010 | } |
| 1011 | if (starflag) |
| 1012 | amap.mp += 3; |
| 1013 | for (; *s; s++) { |
| 1014 | if (*s >= '0' && *s <= '9') |
| 1015 | *(amap.mp)++ = readint(&s); |
| 1016 | } |
| 1017 | } |