1 #define EXTERN 2 #include "l.h" 3 #include <ar.h> 4 5 #ifndef DEFAULT 6 #define DEFAULT '9' 7 #endif 8 9 char *noname = "<none>"; 10 char symname[] = SYMDEF; 11 char thechar = 'k'; 12 char *thestring = "sparc"; 13 14 /* 15 * -H0 -T0x200000 -R0 is boot 16 * -H2 -T4128 -R4096 is plan9 format 17 * -H3 -T0xE0004000 -R4 is javastation boot format 18 */ 19 20 void 21 main(int argc, char *argv[]) 22 { 23 int c; 24 char *a; 25 26 Binit(&bso, 1, OWRITE); 27 cout = -1; 28 listinit(); 29 outfile = 0; 30 nerrors = 0; 31 curtext = P; 32 HEADTYPE = -1; 33 INITTEXT = -1; 34 INITDAT = -1; 35 INITRND = -1; 36 INITENTRY = 0; 37 38 ARGBEGIN { 39 default: 40 c = ARGC(); 41 if(c >= 0 && c < sizeof(debug)) 42 debug[c]++; 43 break; 44 case 'o': 45 outfile = ARGF(); 46 break; 47 case 'E': 48 a = ARGF(); 49 if(a) 50 INITENTRY = a; 51 break; 52 case 'T': 53 a = ARGF(); 54 if(a) 55 INITTEXT = atolwhex(a); 56 break; 57 case 'D': 58 a = ARGF(); 59 if(a) 60 INITDAT = atolwhex(a); 61 break; 62 case 'R': 63 a = ARGF(); 64 if(a) 65 INITRND = atolwhex(a); 66 break; 67 case 'H': 68 a = ARGF(); 69 if(a) 70 HEADTYPE = atolwhex(a); 71 break; 72 } ARGEND 73 USED(argc); 74 if(*argv == 0) { 75 diag("usage: vl [-options] objects\n"); 76 errorexit(); 77 } 78 if(!debug['9'] && !debug['U'] && !debug['B']) 79 debug[DEFAULT] = 1; 80 if(HEADTYPE == -1) { 81 if(debug['U']) 82 HEADTYPE = 0; 83 if(debug['B']) 84 HEADTYPE = 1; 85 if(debug['9']) 86 HEADTYPE = 2; 87 } 88 switch(HEADTYPE) { 89 default: 90 diag("unknown -H option"); 91 errorexit(); 92 93 case 0: /* boot */ 94 HEADR = 32L; 95 if(INITTEXT == -1) 96 INITTEXT = 0x200000L; 97 if(INITDAT == -1) 98 INITDAT = 0; 99 if(INITRND == -1) 100 INITRND = 4096L; 101 break; 102 case 1: /* garbage */ 103 HEADR = 20L+60L; 104 if(INITTEXT == -1) 105 INITTEXT = 0x80020000L; 106 if(INITDAT == -1) 107 INITDAT = 0; 108 if(INITRND == -1) 109 INITRND = 4; 110 break; 111 case 2: /* plan 9 */ 112 HEADR = 32L; 113 if(INITTEXT == -1) 114 INITTEXT = 4128; 115 if(INITDAT == -1) 116 INITDAT = 0; 117 if(INITRND == -1) 118 INITRND = 4096; 119 break; 120 case 3: /* javastation boot */ 121 HEADR = 32L; 122 if(INITTEXT == -1) 123 INITTEXT = 0xE0004020L; 124 if(INITDAT == -1) 125 INITDAT = 0; 126 if(INITRND == -1) 127 INITRND = 4; 128 break; 129 } 130 if(INITDAT != 0 && INITRND != 0) 131 print("warning: -D0x%lux is ignored because of -R0x%lux\n", 132 INITDAT, INITRND); 133 if(debug['v']) 134 Bprint(&bso, "HEADER = -H0x%d -T0x%lux -D0x%lux -R0x%lux\n", 135 HEADTYPE, INITTEXT, INITDAT, INITRND); 136 Bflush(&bso); 137 zprg.as = AGOK; 138 zprg.reg = NREG; 139 zprg.from.name = D_NONE; 140 zprg.from.type = D_NONE; 141 zprg.from.reg = NREG; 142 zprg.to = zprg.from; 143 buildop(); 144 histgen = 0; 145 textp = P; 146 datap = P; 147 pc = 0; 148 dtype = 4; 149 if(outfile == 0) 150 outfile = "k.out"; 151 cout = create(outfile, 1, 0775); 152 if(cout < 0) { 153 diag("%s: cannot create\n", outfile); 154 errorexit(); 155 } 156 nuxiinit(); 157 version = 0; 158 cbp = buf.cbuf; 159 cbc = sizeof(buf.cbuf); 160 firstp = prg(); 161 lastp = firstp; 162 163 if(INITENTRY == 0) { 164 INITENTRY = "_main"; 165 if(debug['p']) 166 INITENTRY = "_mainp"; 167 if(!debug['l']) 168 lookup(INITENTRY, 0)->type = SXREF; 169 } else 170 lookup(INITENTRY, 0)->type = SXREF; 171 172 while(*argv) 173 objfile(*argv++); 174 if(!debug['l']) 175 loadlib(); 176 firstp = firstp->link; 177 if(firstp == P) 178 goto out; 179 patch(); 180 if(debug['p']) 181 if(debug['1']) 182 doprof1(); 183 else 184 doprof2(); 185 dodata(); 186 follow(); 187 if(firstp == P) 188 goto out; 189 noops(); 190 span(); 191 asmb(); 192 undef(); 193 194 out: 195 if(debug['v']) { 196 Bprint(&bso, "%5.2f cpu time\n", cputime()); 197 Bprint(&bso, "%ld memory used\n", tothunk); 198 Bprint(&bso, "%d sizeof adr\n", sizeof(Adr)); 199 Bprint(&bso, "%d sizeof prog\n", sizeof(Prog)); 200 } 201 errorexit(); 202 } 203 204 void 205 loadlib(void) 206 { 207 int i; 208 long h; 209 Sym *s; 210 211 loop: 212 xrefresolv = 0; 213 for(i=0; i<libraryp; i++) { 214 if(debug['v']) 215 Bprint(&bso, "%5.2f autolib: %s\n", cputime(), library[i]); 216 objfile(library[i]); 217 } 218 if(xrefresolv) 219 for(h=0; h<nelem(hash); h++) 220 for(s = hash[h]; s != S; s = s->link) 221 if(s->type == SXREF) 222 goto loop; 223 } 224 225 void 226 errorexit(void) 227 { 228 229 Bflush(&bso); 230 if(nerrors) { 231 if(cout >= 0) 232 remove(outfile); 233 exits("error"); 234 } 235 exits(0); 236 } 237 238 void 239 objfile(char *file) 240 { 241 long off, esym, cnt, l; 242 int f, work; 243 Sym *s; 244 char magbuf[SARMAG]; 245 char name[100], pname[150]; 246 struct ar_hdr arhdr; 247 char *e, *start, *stop; 248 249 if(file[0] == '-' && file[1] == 'l') { 250 if(debug['9']) 251 sprint(name, "/%s/lib/lib", thestring); 252 else 253 sprint(name, "/usr/%clib/lib", thechar); 254 strcat(name, file+2); 255 strcat(name, ".a"); 256 file = name; 257 } 258 if(debug['v']) 259 Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file); 260 Bflush(&bso); 261 f = open(file, 0); 262 if(f < 0) { 263 diag("cannot open file: %s\n", file); 264 errorexit(); 265 } 266 l = read(f, magbuf, SARMAG); 267 if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){ 268 /* load it as a regular file */ 269 l = seek(f, 0L, 2); 270 seek(f, 0L, 0); 271 ldobj(f, l, file); 272 close(f); 273 return; 274 } 275 276 l = read(f, &arhdr, SAR_HDR); 277 if(l != SAR_HDR) { 278 diag("%s: short read on archive file symbol header\n", file); 279 goto out; 280 } 281 if(strncmp(arhdr.name, symname, strlen(symname))) { 282 diag("%s: first entry not symbol header\n", file); 283 goto out; 284 } 285 286 esym = SARMAG + SAR_HDR + atolwhex(arhdr.size); 287 off = SARMAG + SAR_HDR; 288 289 /* 290 * just bang the whole symbol file into memory 291 */ 292 seek(f, off, 0); 293 cnt = esym - off; 294 start = malloc(cnt + 10); 295 cnt = read(f, start, cnt); 296 if(cnt <= 0){ 297 close(f); 298 return; 299 } 300 stop = &start[cnt]; 301 memset(stop, 0, 10); 302 303 work = 1; 304 while(work){ 305 if(debug['v']) 306 Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file); 307 Bflush(&bso); 308 work = 0; 309 for(e = start; e < stop; e = strchr(e+5, 0) + 1) { 310 s = lookup(e+5, 0); 311 if(s->type != SXREF) 312 continue; 313 sprint(pname, "%s(%s)", file, s->name); 314 if(debug['v']) 315 Bprint(&bso, "%5.2f library: %s\n", cputime(), pname); 316 Bflush(&bso); 317 l = e[1] & 0xff; 318 l |= (e[2] & 0xff) << 8; 319 l |= (e[3] & 0xff) << 16; 320 l |= (e[4] & 0xff) << 24; 321 seek(f, l, 0); 322 l = read(f, &arhdr, SAR_HDR); 323 if(l != SAR_HDR) 324 goto bad; 325 if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag))) 326 goto bad; 327 l = atolwhex(arhdr.size); 328 ldobj(f, l, pname); 329 if(s->type == SXREF) { 330 diag("%s: failed to load: %s\n", file, s->name); 331 errorexit(); 332 } 333 work = 1; 334 xrefresolv = 1; 335 } 336 } 337 return; 338 339 bad: 340 diag("%s: bad or out of date archive\n", file); 341 out: 342 close(f); 343 } 344 345 int 346 zaddr(uchar *p, Adr *a, Sym *h[]) 347 { 348 int i, c; 349 long l; 350 Sym *s; 351 Auto *u; 352 353 c = p[2]; 354 if(c < 0 || c > NSYM){ 355 print("sym out of range: %d\n", c); 356 p[0] = AEND+1; 357 return 0; 358 } 359 a->type = p[0]; 360 a->reg = p[1]; 361 a->sym = h[c]; 362 a->name = p[3]; 363 c = 4; 364 365 if(a->reg < 0 || a->reg > NREG) { 366 print("register out of range %d\n", a->reg); 367 p[0] = AEND+1; 368 return 0; /* force real diagnostic */ 369 } 370 371 switch(a->type) { 372 default: 373 print("unknown type %d\n", a->type); 374 p[0] = AEND+1; 375 return 0; /* force real diagnostic */ 376 377 case D_NONE: 378 case D_REG: 379 case D_FREG: 380 case D_CREG: 381 case D_PREG: 382 break; 383 384 case D_BRANCH: 385 case D_OREG: 386 case D_ASI: 387 case D_CONST: 388 a->offset = p[4] | (p[5]<<8) | 389 (p[6]<<16) | (p[7]<<24); 390 c += 4; 391 break; 392 393 case D_SCONST: 394 memmove(a->sval, p+4, NSNAME); 395 c += NSNAME; 396 break; 397 398 case D_FCONST: 399 a->ieee.l = p[4] | (p[5]<<8) | 400 (p[6]<<16) | (p[7]<<24); 401 a->ieee.h = p[8] | (p[9]<<8) | 402 (p[10]<<16) | (p[11]<<24); 403 c += 8; 404 break; 405 } 406 s = a->sym; 407 if(s == S) 408 goto out; 409 i = a->name; 410 if(i != D_AUTO && i != D_PARAM) 411 goto out; 412 413 l = a->offset; 414 for(u=curauto; u; u=u->link) 415 if(u->asym == s) 416 if(u->type == i) { 417 if(u->aoffset > l) 418 u->aoffset = l; 419 goto out; 420 } 421 422 u = malloc(sizeof(Auto)); 423 424 u->link = curauto; 425 curauto = u; 426 u->asym = s; 427 u->aoffset = l; 428 u->type = i; 429 out: 430 return c; 431 } 432 433 void 434 addlib(char *obj) 435 { 436 char name[1024], comp[256], *p; 437 int i; 438 439 if(histfrogp <= 0) 440 return; 441 442 if(histfrog[0]->name[1] == '/') { 443 sprint(name, ""); 444 i = 1; 445 } else 446 if(histfrog[0]->name[1] == '.') { 447 sprint(name, "."); 448 i = 0; 449 } else { 450 if(debug['9']) 451 sprint(name, "/%s/lib", thestring); 452 else 453 sprint(name, "/usr/%clib", thechar); 454 i = 0; 455 } 456 457 for(; i<histfrogp; i++) { 458 snprint(comp, sizeof comp, histfrog[i]->name+1); 459 for(;;) { 460 p = strstr(comp, "$O"); 461 if(p == 0) 462 break; 463 memmove(p+1, p+2, strlen(p+2)+1); 464 p[0] = thechar; 465 } 466 for(;;) { 467 p = strstr(comp, "$M"); 468 if(p == 0) 469 break; 470 if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) { 471 diag("library component too long"); 472 return; 473 } 474 memmove(p+strlen(thestring), p+2, strlen(p+2)+1); 475 memmove(p, thestring, strlen(thestring)); 476 } 477 if(strlen(name) + strlen(comp) + 3 >= sizeof(name)) { 478 diag("library component too long"); 479 return; 480 } 481 strcat(name, "/"); 482 strcat(name, comp); 483 } 484 for(i=0; i<libraryp; i++) 485 if(strcmp(name, library[i]) == 0) 486 return; 487 if(libraryp == nelem(library)){ 488 diag("too many autolibs; skipping %s", name); 489 return; 490 } 491 492 p = malloc(strlen(name) + 1); 493 strcpy(p, name); 494 library[libraryp] = p; 495 p = malloc(strlen(obj) + 1); 496 strcpy(p, obj); 497 libraryobj[libraryp] = p; 498 libraryp++; 499 } 500 501 void 502 addhist(long line, int type) 503 { 504 Auto *u; 505 Sym *s; 506 int i, j, k; 507 508 u = malloc(sizeof(Auto)); 509 s = malloc(sizeof(Sym)); 510 s->name = malloc(2*(histfrogp+1) + 1); 511 512 u->asym = s; 513 u->type = type; 514 u->aoffset = line; 515 u->link = curhist; 516 curhist = u; 517 518 j = 1; 519 for(i=0; i<histfrogp; i++) { 520 k = histfrog[i]->value; 521 s->name[j+0] = k>>8; 522 s->name[j+1] = k; 523 j += 2; 524 } 525 } 526 527 void 528 histtoauto(void) 529 { 530 Auto *l; 531 532 while(l = curhist) { 533 curhist = l->link; 534 l->link = curauto; 535 curauto = l; 536 } 537 } 538 539 void 540 collapsefrog(Sym *s) 541 { 542 int i; 543 544 /* 545 * bad encoding of path components only allows 546 * MAXHIST components. if there is an overflow, 547 * first try to collapse xxx/.. 548 */ 549 for(i=1; i<histfrogp; i++) 550 if(strcmp(histfrog[i]->name+1, "..") == 0) { 551 memmove(histfrog+i-1, histfrog+i+1, 552 (histfrogp-i-1)*sizeof(histfrog[0])); 553 histfrogp--; 554 goto out; 555 } 556 557 /* 558 * next try to collapse . 559 */ 560 for(i=0; i<histfrogp; i++) 561 if(strcmp(histfrog[i]->name+1, ".") == 0) { 562 memmove(histfrog+i, histfrog+i+1, 563 (histfrogp-i-1)*sizeof(histfrog[0])); 564 goto out; 565 } 566 567 /* 568 * last chance, just truncate from front 569 */ 570 memmove(histfrog+0, histfrog+1, 571 (histfrogp-1)*sizeof(histfrog[0])); 572 573 out: 574 histfrog[histfrogp-1] = s; 575 } 576 577 void 578 nopout(Prog *p) 579 { 580 p->as = ANOP; 581 p->from.type = D_NONE; 582 p->to.type = D_NONE; 583 } 584 585 uchar* 586 readsome(int f, uchar *buf, uchar *good, uchar *stop, int max) 587 { 588 int n; 589 590 n = stop - good; 591 memmove(buf, good, stop - good); 592 stop = buf + n; 593 n = MAXIO - n; 594 if(n > max) 595 n = max; 596 n = read(f, stop, n); 597 if(n <= 0) 598 return 0; 599 return stop + n; 600 } 601 602 void 603 ldobj(int f, long c, char *pn) 604 { 605 Prog *p, *t; 606 Sym *h[NSYM], *s, *di; 607 int v, o, r, skip; 608 long ipc; 609 uchar *bloc, *bsize, *stop; 610 611 bsize = buf.xbuf; 612 bloc = buf.xbuf; 613 di = S; 614 615 newloop: 616 memset(h, 0, sizeof(h)); 617 histfrogp = 0; 618 version++; 619 ipc = pc; 620 skip = 0; 621 622 loop: 623 if(c <= 0) 624 goto eof; 625 r = bsize - bloc; 626 if(r < 100 && r < c) { /* enough for largest prog */ 627 bsize = readsome(f, buf.xbuf, bloc, bsize, c); 628 if(bsize == 0) 629 goto eof; 630 bloc = buf.xbuf; 631 goto loop; 632 } 633 o = bloc[0]; /* as */ 634 if(o <= 0 || o >= ALAST) { 635 diag("%s: opcode out of range %d\n", pn, o); 636 print(" probably not a .k file\n"); 637 errorexit(); 638 } 639 if(o == ANAME) { 640 stop = memchr(&bloc[3], 0, bsize-&bloc[3]); 641 if(stop == 0){ 642 bsize = readsome(f, buf.xbuf, bloc, bsize, c); 643 if(bsize == 0) 644 goto eof; 645 bloc = buf.xbuf; 646 stop = memchr(&bloc[3], 0, bsize-&bloc[3]); 647 if(stop == 0){ 648 fprint(2, "%s: name too long\n", pn); 649 errorexit(); 650 } 651 } 652 v = bloc[1]; /* type */ 653 o = bloc[2]; /* sym */ 654 bloc += 3; 655 c -= 3; 656 657 r = 0; 658 if(v == D_STATIC) 659 r = version; 660 s = lookup((char*)bloc, r); 661 c -= &stop[1] - bloc; 662 bloc = stop + 1; 663 664 if(debug['W']) 665 print(" ANAME %s\n", s->name); 666 h[o] = s; 667 if((v == D_EXTERN || v == D_STATIC) && s->type == 0) 668 s->type = SXREF; 669 if(v == D_FILE) { 670 if(s->type != SFILE) { 671 histgen++; 672 s->type = SFILE; 673 s->value = histgen; 674 } 675 if(histfrogp < MAXHIST) { 676 histfrog[histfrogp] = s; 677 histfrogp++; 678 } else 679 collapsefrog(s); 680 } 681 goto loop; 682 } 683 684 if(nhunk < sizeof(Prog)) 685 gethunk(); 686 p = (Prog*)hunk; 687 nhunk -= sizeof(Prog); 688 hunk += sizeof(Prog); 689 690 p->as = o; 691 p->reg = bloc[1] & 0x7f; 692 if(bloc[1] & 0x80) 693 p->mark = NOSCHED; 694 p->line = bloc[2] | (bloc[3]<<8) | (bloc[4]<<16) | (bloc[5]<<24); 695 r = zaddr(bloc+6, &p->from, h) + 6; 696 r += zaddr(bloc+r, &p->to, h); 697 bloc += r; 698 c -= r; 699 700 if(p->reg < 0 || p->reg > NREG) 701 diag("register out of range %d\n", p->reg); 702 703 p->link = P; 704 p->cond = P; 705 706 if(debug['W']) 707 print("%P\n", p); 708 709 switch(o) { 710 case AHISTORY: 711 if(p->to.offset == -1) { 712 addlib(pn); 713 histfrogp = 0; 714 goto loop; 715 } 716 addhist(p->line, D_FILE); /* 'z' */ 717 if(p->to.offset) 718 addhist(p->to.offset, D_FILE1); /* 'Z' */ 719 histfrogp = 0; 720 goto loop; 721 722 case AEND: 723 histtoauto(); 724 if(curtext != P) 725 curtext->to.autom = curauto; 726 curauto = 0; 727 curtext = P; 728 if(c) 729 goto newloop; 730 return; 731 732 case AGLOBL: 733 s = p->from.sym; 734 if(s == S) { 735 diag("GLOBL must have a name\n%P\n", p); 736 errorexit(); 737 } 738 if(s->type == 0 || s->type == SXREF) { 739 s->type = SBSS; 740 s->value = 0; 741 } 742 if(s->type != SBSS) { 743 diag("redefinition: %s\n%P\n", s->name, p); 744 s->type = SBSS; 745 s->value = 0; 746 } 747 if(p->to.offset > s->value) 748 s->value = p->to.offset; 749 break; 750 751 case ADYNT: 752 if(p->to.sym == S) { 753 diag("DYNT without a sym\n%P\n", p); 754 break; 755 } 756 di = p->to.sym; 757 p->reg = 4; 758 if(di->type == SXREF) { 759 if(debug['z']) 760 Bprint(&bso, "%P set to %d\n", p, dtype); 761 di->type = SCONST; 762 di->value = dtype; 763 dtype += 4; 764 } 765 if(p->from.sym == S) 766 break; 767 768 p->from.offset = di->value; 769 p->from.sym->type = SDATA; 770 if(curtext == P) { 771 diag("DYNT not in text: %P\n", p); 772 break; 773 } 774 p->to.sym = curtext->from.sym; 775 p->to.type = D_CONST; 776 p->link = datap; 777 datap = p; 778 break; 779 780 case AINIT: 781 if(p->from.sym == S) { 782 diag("INIT without a sym\n%P\n", p); 783 break; 784 } 785 if(di == S) { 786 diag("INIT without previous DYNT\n%P\n", p); 787 break; 788 } 789 p->from.offset = di->value; 790 p->from.sym->type = SDATA; 791 p->link = datap; 792 datap = p; 793 break; 794 795 case ADATA: 796 p->link = datap; 797 datap = p; 798 break; 799 800 case AGOK: 801 diag("unknown opcode\n%P\n", p); 802 p->pc = pc; 803 pc++; 804 break; 805 806 case ATEXT: 807 if(curtext != P) { 808 histtoauto(); 809 curtext->to.autom = curauto; 810 curauto = 0; 811 } 812 curtext = p; 813 autosize = (p->to.offset+3L) & ~3L; 814 p->to.offset = autosize; 815 autosize += 4; 816 s = p->from.sym; 817 if(s == S) { 818 diag("TEXT must have a name\n%P\n", p); 819 errorexit(); 820 } 821 if(s->type != 0 && s->type != SXREF) { 822 if(p->reg & DUPOK) { 823 skip = 1; 824 goto casedef; 825 } 826 diag("redefinition: %s\n%P\n", s->name, p); 827 } 828 s->type = STEXT; 829 s->value = pc; 830 if(textp != P) { 831 for(t = textp; t->cond != P; t = t->cond) 832 ; 833 t->cond = p; 834 } else 835 textp = p; 836 lastp->link = p; 837 lastp = p; 838 p->pc = pc; 839 pc++; 840 break; 841 842 case AFMOVF: 843 if(skip) 844 goto casedef; 845 846 if(p->from.type == D_FCONST) { 847 /* size sb 9 max */ 848 sprint(literal, "$%lux", ieeedtof(&p->from.ieee)); 849 s = lookup(literal, 0); 850 if(s->type == 0) { 851 s->type = SBSS; 852 s->value = 4; 853 t = prg(); 854 t->as = ADATA; 855 t->line = p->line; 856 t->from.type = D_OREG; 857 t->from.sym = s; 858 t->from.name = D_EXTERN; 859 t->reg = 4; 860 t->to = p->from; 861 t->link = datap; 862 datap = t; 863 } 864 p->from.type = D_OREG; 865 p->from.sym = s; 866 p->from.name = D_EXTERN; 867 p->from.offset = 0; 868 } 869 goto casedef; 870 871 case AFMOVD: 872 if(skip) 873 goto casedef; 874 if(p->from.type == D_FCONST) { 875 /* size sb 18 max */ 876 sprint(literal, "$%lux.%lux", 877 p->from.ieee.l, p->from.ieee.h); 878 s = lookup(literal, 0); 879 if(s->type == 0) { 880 s->type = SBSS; 881 s->value = 8; 882 t = prg(); 883 t->as = ADATA; 884 t->line = p->line; 885 t->from.type = D_OREG; 886 t->from.sym = s; 887 t->from.name = D_EXTERN; 888 t->reg = 8; 889 t->to = p->from; 890 t->link = datap; 891 datap = t; 892 } 893 p->from.type = D_OREG; 894 p->from.sym = s; 895 p->from.name = D_EXTERN; 896 p->from.offset = 0; 897 } 898 goto casedef; 899 900 default: 901 casedef: 902 if(skip) 903 nopout(p); 904 905 if(p->to.type == D_BRANCH) 906 p->to.offset += ipc; 907 lastp->link = p; 908 lastp = p; 909 p->pc = pc; 910 pc++; 911 break; 912 } 913 goto loop; 914 915 eof: 916 diag("truncated object file: %s\n", pn); 917 } 918 919 Sym* 920 lookup(char *symb, int v) 921 { 922 Sym *s; 923 char *p; 924 long h; 925 int c, l; 926 927 h = v; 928 for(p=symb; c = *p; p++) 929 h = h+h+h + c; 930 l = (p - symb) + 1; 931 if(h < 0) 932 h = ~h; 933 h %= NHASH; 934 for(s = hash[h]; s != S; s = s->link) 935 if(s->version == v) 936 if(memcmp(s->name, symb, l) == 0) 937 return s; 938 939 while(nhunk < sizeof(Sym)) 940 gethunk(); 941 s = (Sym*)hunk; 942 nhunk -= sizeof(Sym); 943 hunk += sizeof(Sym); 944 945 s->name = malloc(l + 1); 946 memmove(s->name, symb, l); 947 948 s->link = hash[h]; 949 s->type = 0; 950 s->version = v; 951 s->value = 0; 952 hash[h] = s; 953 return s; 954 } 955 956 Prog* 957 prg(void) 958 { 959 Prog *p; 960 int n; 961 962 n = (sizeof(Prog) + 3) & ~3; 963 while(nhunk < n) 964 gethunk(); 965 966 p = (Prog*)hunk; 967 nhunk -= n; 968 hunk += n; 969 970 *p = zprg; 971 return p; 972 } 973 974 void 975 gethunk(void) 976 { 977 char *h; 978 979 h = mysbrk((int)NHUNK); 980 if(h == (char *)-1) { 981 diag("out of memory\n"); 982 errorexit(); 983 } 984 985 hunk = h; 986 nhunk = NHUNK; 987 tothunk += NHUNK; 988 } 989 990 void 991 doprof1(void) 992 { 993 Sym *s; 994 long n; 995 Prog *p, *q; 996 997 if(debug['v']) 998 Bprint(&bso, "%5.2f profile 1\n", cputime()); 999 Bflush(&bso); 1000 s = lookup("__mcount", 0); 1001 n = 1; 1002 for(p = firstp->link; p != P; p = p->link) { 1003 if(p->as == ATEXT) { 1004 q = prg(); 1005 q->line = p->line; 1006 q->link = datap; 1007 datap = q; 1008 q->as = ADATA; 1009 q->from.type = D_OREG; 1010 q->from.name = D_EXTERN; 1011 q->from.offset = n*4; 1012 q->from.sym = s; 1013 q->reg = 4; 1014 q->to = p->from; 1015 q->to.type = D_CONST; 1016 1017 q = prg(); 1018 q->line = p->line; 1019 q->pc = p->pc; 1020 q->link = p->link; 1021 p->link = q; 1022 p = q; 1023 p->as = AMOVW; 1024 p->from.type = D_OREG; 1025 p->from.name = D_EXTERN; 1026 p->from.sym = s; 1027 p->from.offset = n*4 + 4; 1028 p->to.type = D_REG; 1029 p->to.reg = REGTMP; 1030 1031 q = prg(); 1032 q->line = p->line; 1033 q->pc = p->pc; 1034 q->link = p->link; 1035 p->link = q; 1036 p = q; 1037 p->as = AADD; 1038 p->from.type = D_CONST; 1039 p->from.offset = 1; 1040 p->to.type = D_REG; 1041 p->to.reg = REGTMP; 1042 1043 q = prg(); 1044 q->line = p->line; 1045 q->pc = p->pc; 1046 q->link = p->link; 1047 p->link = q; 1048 p = q; 1049 p->as = AMOVW; 1050 p->from.type = D_REG; 1051 p->from.reg = REGTMP; 1052 p->to.type = D_OREG; 1053 p->to.name = D_EXTERN; 1054 p->to.sym = s; 1055 p->to.offset = n*4 + 4; 1056 1057 n += 2; 1058 continue; 1059 } 1060 } 1061 q = prg(); 1062 q->line = 0; 1063 q->link = datap; 1064 datap = q; 1065 1066 q->as = ADATA; 1067 q->from.type = D_OREG; 1068 q->from.name = D_EXTERN; 1069 q->from.sym = s; 1070 q->reg = 4; 1071 q->to.type = D_CONST; 1072 q->to.offset = n; 1073 1074 s->type = SBSS; 1075 s->value = n*4; 1076 } 1077 1078 void 1079 doprof2(void) 1080 { 1081 Sym *s2, *s4; 1082 Prog *p, *q, *ps2, *ps4; 1083 1084 if(debug['v']) 1085 Bprint(&bso, "%5.2f profile 2\n", cputime()); 1086 Bflush(&bso); 1087 1088 s2 = lookup("_profin", 0); 1089 s4 = lookup("_profout", 0); 1090 if(s2->type != STEXT || s4->type != STEXT) { 1091 diag("_profin/_profout not defined\n"); 1092 return; 1093 } 1094 1095 ps2 = P; 1096 ps4 = P; 1097 for(p = firstp; p != P; p = p->link) { 1098 if(p->as == ATEXT) { 1099 if(p->from.sym == s2) { 1100 p->reg = 1; 1101 ps2 = p; 1102 } 1103 if(p->from.sym == s4) { 1104 p->reg = 1; 1105 ps4 = p; 1106 } 1107 } 1108 } 1109 for(p = firstp; p != P; p = p->link) { 1110 if(p->as == ATEXT) { 1111 curtext = p; 1112 1113 if(p->reg & NOPROF) { /* dont profile */ 1114 for(;;) { 1115 q = p->link; 1116 if(q == P) 1117 break; 1118 if(q->as == ATEXT) 1119 break; 1120 p = q; 1121 } 1122 continue; 1123 } 1124 1125 /* 1126 * JMPL profin 1127 */ 1128 q = prg(); 1129 q->line = p->line; 1130 q->pc = p->pc; 1131 q->link = p->link; 1132 p->link = q; 1133 p = q; 1134 p->as = AJMPL; 1135 p->to.type = D_BRANCH; 1136 p->cond = ps2; 1137 p->to.sym = s2; 1138 1139 continue; 1140 } 1141 if(p->as == ARETURN) { 1142 1143 /* 1144 * RETURN 1145 */ 1146 q = prg(); 1147 q->as = ARETURN; 1148 q->from = p->from; 1149 q->to = p->to; 1150 q->link = p->link; 1151 p->link = q; 1152 1153 /* 1154 * JMPL profout 1155 */ 1156 p->as = AJMPL; 1157 p->from = zprg.from; 1158 p->to = zprg.to; 1159 p->to.type = D_BRANCH; 1160 p->cond = ps4; 1161 p->to.sym = s4; 1162 1163 p = q; 1164 1165 continue; 1166 } 1167 } 1168 } 1169 1170 void 1171 nuxiinit(void) 1172 { 1173 int i, c; 1174 1175 for(i=0; i<4; i++) { 1176 c = find1(0x01020304L, i+1); 1177 if(i >= 2) 1178 inuxi2[i-2] = c; 1179 if(i >= 3) 1180 inuxi1[i-3] = c; 1181 inuxi4[i] = c; 1182 1183 fnuxi8[i] = c+4; 1184 fnuxi8[i+4] = c; 1185 } 1186 if(debug['v']) { 1187 Bprint(&bso, "inuxi = "); 1188 for(i=0; i<1; i++) 1189 Bprint(&bso, "%d", inuxi1[i]); 1190 Bprint(&bso, " "); 1191 for(i=0; i<2; i++) 1192 Bprint(&bso, "%d", inuxi2[i]); 1193 Bprint(&bso, " "); 1194 for(i=0; i<4; i++) 1195 Bprint(&bso, "%d", inuxi4[i]); 1196 Bprint(&bso, "\nfnuxi = "); 1197 for(i=0; i<8; i++) 1198 Bprint(&bso, "%d", fnuxi8[i]); 1199 Bprint(&bso, "\n"); 1200 } 1201 Bflush(&bso); 1202 } 1203 1204 int 1205 find1(long l, int c) 1206 { 1207 char *p; 1208 int i; 1209 1210 p = (char*)&l; 1211 for(i=0; i<4; i++) 1212 if(*p++ == c) 1213 return i; 1214 return 0; 1215 } 1216 1217 long 1218 ieeedtof(Ieee *ieeep) 1219 { 1220 int exp; 1221 long v; 1222 1223 if(ieeep->h == 0) 1224 return 0; 1225 exp = (ieeep->h>>20) & ((1L<<11)-1L); 1226 exp -= (1L<<10) - 2L; 1227 v = (ieeep->h & 0xfffffL) << 3; 1228 v |= (ieeep->l >> 29) & 0x7L; 1229 if((ieeep->l >> 28) & 1) { 1230 v++; 1231 if(v & 0x800000L) { 1232 v = (v & 0x7fffffL) >> 1; 1233 exp++; 1234 } 1235 } 1236 if(exp <= -126 || exp >= 130) 1237 diag("double fp to single fp overflow\n"); 1238 v |= ((exp + 126) & 0xffL) << 23; 1239 v |= ieeep->h & 0x80000000L; 1240 return v; 1241 } 1242 1243 double 1244 ieeedtod(Ieee *ieeep) 1245 { 1246 Ieee e; 1247 double fr; 1248 int exp; 1249 1250 if(ieeep->h & (1L<<31)) { 1251 e.h = ieeep->h & ~(1L<<31); 1252 e.l = ieeep->l; 1253 return -ieeedtod(&e); 1254 } 1255 if(ieeep->l == 0 && ieeep->h == 0) 1256 return 0; 1257 fr = ieeep->l & ((1L<<16)-1L); 1258 fr /= 1L<<16; 1259 fr += (ieeep->l>>16) & ((1L<<16)-1L); 1260 fr /= 1L<<16; 1261 fr += (ieeep->h & (1L<<20)-1L) | (1L<<20); 1262 fr /= 1L<<21; 1263 exp = (ieeep->h>>20) & ((1L<<11)-1L); 1264 exp -= (1L<<10) - 2L; 1265 return ldexp(fr, exp); 1266 } 1267