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 = '6';
12 char *thestring = "amd64";
13 char *paramspace = "FP";
14
15 char** libdir;
16 int nlibdir = 0;
17 static int maxlibdir = 0;
18
19 /*
20 * -H2 -T0x200028 -R0x200000 is plan9 format (was -T4136 -R4096)
21 * -H5 -T0x80110000 -R4096 is ELF32
22 * -H6 -T0x2000e8 -R0x200000 is ELF64
23 *
24 * options used: 189BLPQSVWabcjlnpsvz
25 */
26
27 void
usage(void)28 usage(void)
29 {
30 diag("usage: %s [-options] objects", argv0);
31 errorexit();
32 }
33
34 static int
isobjfile(char * f)35 isobjfile(char *f)
36 {
37 int n, v;
38 Biobuf *b;
39 char buf1[5], buf2[SARMAG];
40
41 b = Bopen(f, OREAD);
42 if(b == nil)
43 return 0;
44 n = Bread(b, buf1, 5);
45 if(n == 5 && (buf1[2] == 1 && buf1[3] == '<' || buf1[3] == 1 && buf1[4] == '<'))
46 v = 1; /* good enough for our purposes */
47 else{
48 Bseek(b, 0, 0);
49 n = Bread(b, buf2, SARMAG);
50 v = n == SARMAG && strncmp(buf2, ARMAG, SARMAG) == 0;
51 }
52 Bterm(b);
53 return v;
54 }
55
56 void
main(int argc,char * argv[])57 main(int argc, char *argv[])
58 {
59 int i, c;
60 char *a;
61 char name[LIBNAMELEN];
62
63 Binit(&bso, 1, OWRITE);
64 cout = -1;
65 listinit();
66 memset(debug, 0, sizeof(debug));
67 nerrors = 0;
68 outfile = "6.out";
69 HEADTYPE = -1;
70 INITTEXT = -1;
71 INITTEXTP = -1;
72 INITDAT = -1;
73 INITRND = -1;
74 INITENTRY = 0;
75 ARGBEGIN {
76 default:
77 c = ARGC();
78 if(c >= 0 && c < sizeof(debug))
79 debug[c]++;
80 break;
81 case 'o': /* output to (next arg) */
82 outfile = ARGF();
83 break;
84 case 'E':
85 a = ARGF();
86 if(a)
87 INITENTRY = a;
88 break;
89 case 'H':
90 a = ARGF();
91 if(a)
92 HEADTYPE = atolwhex(a);
93 break;
94 case 'L':
95 addlibpath(EARGF(usage()));
96 break;
97 case 'T':
98 a = ARGF();
99 if(a)
100 INITTEXT = atolwhex(a);
101 break;
102 case 'P':
103 a = ARGF();
104 if(a)
105 INITTEXTP = atolwhex(a);
106 break;
107 case 'D':
108 a = ARGF();
109 if(a)
110 INITDAT = atolwhex(a);
111 break;
112 case 'R':
113 a = ARGF();
114 if(a)
115 INITRND = atolwhex(a);
116 break;
117 case 'x': /* produce export table */
118 doexp = 1;
119 if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
120 readundefs(ARGF(), SEXPORT);
121 break;
122 case 'u': /* produce dynamically loadable module */
123 dlm = 1;
124 debug['l']++;
125 if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
126 readundefs(ARGF(), SIMPORT);
127 break;
128 } ARGEND
129 USED(argc);
130 if(*argv == nil)
131 usage();
132 if(!debug['9'] && !debug['U'] && !debug['B'])
133 debug[DEFAULT] = 1;
134 a = getenv("ccroot");
135 if(a != nil && *a != '\0') {
136 if(!fileexists(a)) {
137 diag("nonexistent $ccroot: %s", a);
138 errorexit();
139 }
140 }else
141 a = "";
142 snprint(name, sizeof(name), "%s/%s/lib", a, thestring);
143 addlibpath(name);
144 if(HEADTYPE == -1) {
145 if(debug['B'])
146 HEADTYPE = 2;
147 if(debug['9'])
148 HEADTYPE = 2;
149 }
150 switch(HEADTYPE) {
151 default:
152 diag("unknown -H option");
153 errorexit();
154 case 2: /* plan 9 */
155 HEADR = 32L+8L;
156 if(INITTEXT == -1)
157 INITTEXT = 0x200000+HEADR;
158 if(INITDAT == -1)
159 INITDAT = 0;
160 if(INITRND == -1)
161 INITRND = 0x200000;
162 break;
163 case 5: /* elf32 executable */
164 HEADR = rnd(Ehdr32sz+3*Phdr32sz, 16);
165 if(INITTEXT == -1)
166 INITTEXT = 0xf0110000L;
167 if(INITDAT == -1)
168 INITDAT = 0;
169 if(INITRND == -1)
170 INITRND = 4096;
171 break;
172 case 6: /* ELF64 executable */
173 HEADR = rnd(Ehdr64sz+3*Phdr64sz, 16);
174 if(INITTEXT == -1)
175 INITTEXT = 0x200000+HEADR;
176 if(INITDAT == -1)
177 INITDAT = 0;
178 if(INITRND == -1)
179 INITRND = 0x200000;
180 break;
181 }
182 if (INITTEXTP == -1)
183 INITTEXTP = INITTEXT;
184 if(INITDAT != 0 && INITRND != 0)
185 print("warning: -D0x%llux is ignored because of -R0x%lux\n",
186 INITDAT, INITRND);
187 if(debug['v'])
188 Bprint(&bso, "HEADER = -H%ld -T0x%llux -D0x%llux -R0x%lux\n",
189 HEADTYPE, INITTEXT, INITDAT, INITRND);
190 Bflush(&bso);
191 for(i=1; optab[i].as; i++) {
192 c = optab[i].as;
193 if(opindex[c] != nil) {
194 diag("phase error in optab: %d (%A)", i, c);
195 errorexit();
196 }
197 opindex[c] = &optab[i];
198 }
199
200 for(i=0; i<Ymax; i++)
201 ycover[i*Ymax + i] = 1;
202
203 ycover[Yi0*Ymax + Yi8] = 1;
204 ycover[Yi1*Ymax + Yi8] = 1;
205
206 ycover[Yi0*Ymax + Ys32] = 1;
207 ycover[Yi1*Ymax + Ys32] = 1;
208 ycover[Yi8*Ymax + Ys32] = 1;
209
210 ycover[Yi0*Ymax + Yi32] = 1;
211 ycover[Yi1*Ymax + Yi32] = 1;
212 ycover[Yi8*Ymax + Yi32] = 1;
213 ycover[Ys32*Ymax + Yi32] = 1;
214
215 ycover[Yi0*Ymax + Yi64] = 1;
216 ycover[Yi1*Ymax + Yi64] = 1;
217 ycover[Yi8*Ymax + Yi64] = 1;
218 ycover[Ys32*Ymax + Yi64] = 1;
219 ycover[Yi32*Ymax + Yi64] = 1;
220
221 ycover[Yal*Ymax + Yrb] = 1;
222 ycover[Ycl*Ymax + Yrb] = 1;
223 ycover[Yax*Ymax + Yrb] = 1;
224 ycover[Ycx*Ymax + Yrb] = 1;
225 ycover[Yrx*Ymax + Yrb] = 1;
226 ycover[Yrl*Ymax + Yrb] = 1; // 8l disables this
227 ycover[Ycl*Ymax + Ycx] = 1; // 8l disables this
228
229 ycover[Yax*Ymax + Yrx] = 1;
230 ycover[Ycx*Ymax + Yrx] = 1;
231
232 ycover[Yax*Ymax + Yrl] = 1;
233 ycover[Ycx*Ymax + Yrl] = 1;
234 ycover[Yrx*Ymax + Yrl] = 1;
235
236 ycover[Yf0*Ymax + Yrf] = 1;
237
238 ycover[Yal*Ymax + Ymb] = 1;
239 ycover[Ycl*Ymax + Ymb] = 1;
240 ycover[Yax*Ymax + Ymb] = 1;
241 ycover[Ycx*Ymax + Ymb] = 1;
242 ycover[Yrx*Ymax + Ymb] = 1;
243 ycover[Yrb*Ymax + Ymb] = 1;
244 ycover[Yrl*Ymax + Ymb] = 1; // 8l disables this
245 ycover[Ym*Ymax + Ymb] = 1;
246
247 ycover[Yax*Ymax + Yml] = 1;
248 ycover[Ycx*Ymax + Yml] = 1;
249 ycover[Yrx*Ymax + Yml] = 1;
250 ycover[Yrl*Ymax + Yml] = 1;
251 ycover[Ym*Ymax + Yml] = 1;
252
253 ycover[Yax*Ymax + Ymm] = 1;
254 ycover[Ycx*Ymax + Ymm] = 1;
255 ycover[Yrx*Ymax + Ymm] = 1;
256 ycover[Yrl*Ymax + Ymm] = 1;
257 ycover[Ym*Ymax + Ymm] = 1;
258 ycover[Ymr*Ymax + Ymm] = 1;
259
260 ycover[Yax*Ymax + Yxm] = 1;
261 ycover[Ycx*Ymax + Yxm] = 1;
262 ycover[Yrx*Ymax + Yxm] = 1;
263 ycover[Yrl*Ymax + Yxm] = 1;
264 ycover[Ym*Ymax + Yxm] = 1;
265 ycover[Yxr*Ymax + Yxm] = 1;
266 ycover[Yxr*Ymax + Yxyr] = 1;
267
268 ycover[Yyr*Ymax + Yxm] = 1;
269 ycover[Yyr*Ymax + Yxyr] = 1;
270
271 for(i=0; i<D_NONE; i++) {
272 reg[i] = -1;
273 if(i >= D_AL && i <= D_R15B) {
274 reg[i] = (i-D_AL) & 7;
275 if(i >= D_SPB && i <= D_DIB)
276 regrex[i] = 0x40;
277 if(i >= D_R8B && i <= D_R15B)
278 regrex[i] = Rxr | Rxx | Rxb;
279 }
280 if(i >= D_AH && i<= D_BH)
281 reg[i] = 4 + ((i-D_AH) & 7);
282 if(i >= D_AX && i <= D_R15) {
283 reg[i] = (i-D_AX) & 7;
284 if(i >= D_R8)
285 regrex[i] = Rxr | Rxx | Rxb;
286 }
287 /*
288 if(i >= D_F0 && i <= D_F0+7)
289 reg[i] = (i-D_F0) & 7;
290 */
291 if(i >= D_M0 && i <= D_M0+7)
292 reg[i] = (i-D_M0) & 7;
293 if(i >= D_X0 && i <= D_X0+15) {
294 reg[i] = (i-D_X0) & 7;
295 if(i >= D_X0+8)
296 regrex[i] = Rxr | Rxx | Rxb;
297 }
298 if(i >= D_Y0 && i <= D_Y0+15) {
299 reg[i] = (i-D_Y0) & 7;
300 if(i >= D_Y0+8)
301 regrex[i] = Rxr | Rxx | Rxb;
302 }
303 if(i >= D_CR+8 && i <= D_CR+15)
304 regrex[i] = Rxr;
305 }
306
307 zprg.link = P;
308 zprg.pcond = P;
309 zprg.back = 2;
310 zprg.as = AGOK;
311 zprg.from.type = D_NONE;
312 zprg.from.index = D_NONE;
313 zprg.from.scale = 1;
314 zprg.to = zprg.from;
315 zprg.mode = 64;
316
317 pcstr = "%.6llux ";
318 nuxiinit();
319 histgen = 0;
320 textp = P;
321 datap = P;
322 edatap = P;
323 pc = 0;
324 dtype = 4;
325 cout = create(outfile, 1, 0775);
326 if(cout < 0) {
327 diag("cannot create %s: %r", outfile);
328 errorexit();
329 }
330 version = 0;
331 cbp = buf.cbuf;
332 cbc = sizeof(buf.cbuf);
333 firstp = prg();
334 lastp = firstp;
335
336 if(INITENTRY == 0) {
337 INITENTRY = "_main";
338 if(debug['p'])
339 INITENTRY = "_mainp";
340 if(!debug['l'])
341 lookup(INITENTRY, 0)->type = SXREF;
342 } else if(!(*INITENTRY >= '0' && *INITENTRY <= '9'))
343 lookup(INITENTRY, 0)->type = SXREF;
344
345 while(*argv)
346 objfile(*argv++);
347 if(!debug['l'])
348 loadlib();
349 firstp = firstp->link;
350 if(firstp == P)
351 errorexit();
352 if(doexp || dlm){
353 EXPTAB = "_exporttab";
354 zerosig(EXPTAB);
355 zerosig("etext");
356 zerosig("edata");
357 zerosig("end");
358 if(dlm){
359 import();
360 HEADTYPE = 2;
361 INITTEXT = 0;
362 INITDAT = 0;
363 INITRND = 8;
364 INITENTRY = EXPTAB;
365 }
366 export();
367 }
368 patch();
369 follow();
370 dodata();
371 dostkoff();
372 paramspace = "SP"; /* (FP) now (SP) on output */
373 if(debug['p'])
374 if(debug['1'])
375 doprof1();
376 else
377 doprof2();
378 span();
379 doinit();
380 asmb();
381 undef();
382 if(debug['v']) {
383 Bprint(&bso, "%5.2f cpu time\n", cputime());
384 Bprint(&bso, "%ld symbols\n", nsymbol);
385 Bprint(&bso, "%ld memory used\n", thunk);
386 Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
387 Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
388 }
389 Bflush(&bso);
390
391 errorexit();
392 }
393
394 void
addlibpath(char * arg)395 addlibpath(char *arg)
396 {
397 char **p;
398
399 if(nlibdir >= maxlibdir) {
400 if(maxlibdir == 0)
401 maxlibdir = 8;
402 else
403 maxlibdir *= 2;
404 p = malloc(maxlibdir*sizeof(*p));
405 if(p == nil) {
406 diag("out of memory");
407 errorexit();
408 }
409 memmove(p, libdir, nlibdir*sizeof(*p));
410 free(libdir);
411 libdir = p;
412 }
413 libdir[nlibdir++] = strdup(arg);
414 }
415
416 char*
findlib(char * file)417 findlib(char *file)
418 {
419 int i;
420 char name[LIBNAMELEN];
421
422 for(i = 0; i < nlibdir; i++) {
423 snprint(name, sizeof(name), "%s/%s", libdir[i], file);
424 if(fileexists(name))
425 return libdir[i];
426 }
427 return nil;
428 }
429
430 void
loadlib(void)431 loadlib(void)
432 {
433 int i;
434 long h;
435 Sym *s;
436
437 loop:
438 xrefresolv = 0;
439 for(i=0; i<libraryp; i++) {
440 if(debug['v'])
441 Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[i]);
442 objfile(library[i]);
443 }
444 if(xrefresolv)
445 for(h=0; h<nelem(hash); h++)
446 for(s = hash[h]; s != S; s = s->link)
447 if(s->type == SXREF)
448 goto loop;
449 }
450
451 void
errorexit(void)452 errorexit(void)
453 {
454
455 if(nerrors) {
456 if(cout >= 0)
457 remove(outfile);
458 exits("error");
459 }
460 exits(0);
461 }
462
463 void
objfile(char * file)464 objfile(char *file)
465 {
466 long off, esym, cnt, l;
467 int f, work;
468 Sym *s;
469 char magbuf[SARMAG];
470 char name[LIBNAMELEN], pname[LIBNAMELEN];
471 struct ar_hdr arhdr;
472 char *e, *start, *stop;
473
474 if(debug['v'])
475 Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
476 Bflush(&bso);
477 if(file[0] == '-' && file[1] == 'l') {
478 snprint(pname, sizeof(pname), "lib%s.a", file+2);
479 e = findlib(pname);
480 if(e == nil) {
481 diag("cannot find library: %s", file);
482 errorexit();
483 }
484 snprint(name, sizeof(name), "%s/%s", e, pname);
485 file = name;
486 }
487 f = open(file, 0);
488 if(f < 0) {
489 diag("cannot open %s: %r", file);
490 errorexit();
491 }
492 l = read(f, magbuf, SARMAG);
493 if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
494 /* load it as a regular file */
495 l = seek(f, 0L, 2);
496 seek(f, 0L, 0);
497 ldobj(f, l, file);
498 close(f);
499 return;
500 }
501
502 l = read(f, &arhdr, SAR_HDR);
503 if(l != SAR_HDR) {
504 diag("%s: short read on archive file symbol header", file);
505 goto out;
506 }
507 if(strncmp(arhdr.name, symname, strlen(symname))) {
508 diag("%s: first entry not symbol header", file);
509 goto out;
510 }
511
512 esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);
513 off = SARMAG + SAR_HDR;
514
515 /*
516 * just bang the whole symbol file into memory
517 */
518 seek(f, off, 0);
519 cnt = esym - off;
520 start = malloc(cnt + 10);
521 cnt = read(f, start, cnt);
522 if(cnt <= 0){
523 close(f);
524 return;
525 }
526 stop = &start[cnt];
527 memset(stop, 0, 10);
528
529 work = 1;
530 while(work) {
531 if(debug['v'])
532 Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);
533 Bflush(&bso);
534 work = 0;
535 for(e = start; e < stop; e = strchr(e+5, 0) + 1) {
536 s = lookup(e+5, 0);
537 if(s->type != SXREF)
538 continue;
539 sprint(pname, "%s(%s)", file, s->name);
540 if(debug['v'])
541 Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);
542 Bflush(&bso);
543 l = e[1] & 0xff;
544 l |= (e[2] & 0xff) << 8;
545 l |= (e[3] & 0xff) << 16;
546 l |= (e[4] & 0xff) << 24;
547 seek(f, l, 0);
548 l = read(f, &arhdr, SAR_HDR);
549 if(l != SAR_HDR)
550 goto bad;
551 if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
552 goto bad;
553 l = atolwhex(arhdr.size);
554 ldobj(f, l, pname);
555 if(s->type == SXREF) {
556 diag("%s: failed to load: %s", file, s->name);
557 errorexit();
558 }
559 work = 1;
560 xrefresolv = 1;
561 }
562 }
563 return;
564
565 bad:
566 diag("%s: bad or out of date archive", file);
567 out:
568 close(f);
569 }
570
571 int
zaddr(uchar * p,Adr * a,Sym * h[])572 zaddr(uchar *p, Adr *a, Sym *h[])
573 {
574 int c, t, i;
575 int l;
576 Sym *s;
577 Auto *u;
578
579 t = p[0];
580 c = 1;
581 if(t & T_INDEX) {
582 a->index = p[c];
583 a->scale = p[c+1];
584 c += 2;
585 } else {
586 a->index = D_NONE;
587 a->scale = 0;
588 }
589 a->offset = 0;
590 if(t & T_OFFSET) {
591 l = p[c] | (p[c+1]<<8) | (p[c+2]<<16) | (p[c+3]<<24);
592 a->offset = l;
593 c += 4;
594 if(t & T_64) {
595 l = p[c] | (p[c+1]<<8) | (p[c+2]<<16) | (p[c+3]<<24);
596 a->offset = ((vlong)l<<32) | (a->offset & 0xFFFFFFFFUL);
597 c += 4;
598 }
599 }
600 a->sym = S;
601 if(t & T_SYM) {
602 a->sym = h[p[c]];
603 c++;
604 }
605 a->type = D_NONE;
606 if(t & T_FCONST) {
607 a->ieee.l = p[c] | (p[c+1]<<8) | (p[c+2]<<16) | (p[c+3]<<24);
608 a->ieee.h = p[c+4] | (p[c+5]<<8) | (p[c+6]<<16) | (p[c+7]<<24);
609 c += 8;
610 a->type = D_FCONST;
611 } else
612 if(t & T_SCONST) {
613 for(i=0; i<NSNAME; i++)
614 a->scon[i] = p[c+i];
615 c += NSNAME;
616 a->type = D_SCONST;
617 }
618 if(t & T_TYPE) {
619 a->type = p[c];
620 c++;
621 }
622 s = a->sym;
623 if(s == S)
624 return c;
625
626 t = a->type;
627 if(t != D_AUTO && t != D_PARAM)
628 return c;
629 l = a->offset;
630 for(u=curauto; u; u=u->link) {
631 if(u->asym == s)
632 if(u->type == t) {
633 if(u->aoffset > l)
634 u->aoffset = l;
635 return c;
636 }
637 }
638
639 while(nhunk < sizeof(Auto))
640 gethunk();
641 u = (Auto*)hunk;
642 nhunk -= sizeof(Auto);
643 hunk += sizeof(Auto);
644
645 u->link = curauto;
646 curauto = u;
647 u->asym = s;
648 u->aoffset = l;
649 u->type = t;
650 return c;
651 }
652
653 void
addlib(char * obj)654 addlib(char *obj)
655 {
656 char fn1[LIBNAMELEN], fn2[LIBNAMELEN], comp[LIBNAMELEN], *p, *name;
657 int i, search;
658
659 if(histfrogp <= 0)
660 return;
661
662 name = fn1;
663 search = 0;
664 if(histfrog[0]->name[1] == '/') {
665 sprint(name, "");
666 i = 1;
667 } else if(histfrog[0]->name[1] == '.') {
668 sprint(name, ".");
669 i = 0;
670 } else {
671 sprint(name, "");
672 i = 0;
673 search = 1;
674 }
675
676 for(; i<histfrogp; i++) {
677 snprint(comp, sizeof comp, histfrog[i]->name+1);
678 for(;;) {
679 p = strstr(comp, "$O");
680 if(p == 0)
681 break;
682 memmove(p+1, p+2, strlen(p+2)+1);
683 p[0] = thechar;
684 }
685 for(;;) {
686 p = strstr(comp, "$M");
687 if(p == 0)
688 break;
689 if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) {
690 diag("library component too long");
691 return;
692 }
693 memmove(p+strlen(thestring), p+2, strlen(p+2)+1);
694 memmove(p, thestring, strlen(thestring));
695 }
696 if(strlen(fn1) + strlen(comp) + 3 >= sizeof(fn1)) {
697 diag("library component too long");
698 return;
699 }
700 if(i > 0 || !search)
701 strcat(fn1, "/");
702 strcat(fn1, comp);
703 }
704
705 cleanname(name);
706
707 if(search){
708 p = findlib(name);
709 if(p != nil){
710 snprint(fn2, sizeof(fn2), "%s/%s", p, name);
711 name = fn2;
712 }
713 }
714
715 for(i=0; i<libraryp; i++)
716 if(strcmp(name, library[i]) == 0)
717 return;
718 if(libraryp == nelem(library)){
719 diag("too many autolibs; skipping %s", name);
720 return;
721 }
722
723 p = malloc(strlen(name) + 1);
724 strcpy(p, name);
725 library[libraryp] = p;
726 p = malloc(strlen(obj) + 1);
727 strcpy(p, obj);
728 libraryobj[libraryp] = p;
729 libraryp++;
730 }
731
732 void
addhist(long line,int type)733 addhist(long line, int type)
734 {
735 Auto *u;
736 Sym *s;
737 int i, j, k;
738
739 u = malloc(sizeof(Auto));
740 s = malloc(sizeof(Sym));
741 s->name = malloc(2*(histfrogp+1) + 1);
742
743 u->asym = s;
744 u->type = type;
745 u->aoffset = line;
746 u->link = curhist;
747 curhist = u;
748
749 j = 1;
750 for(i=0; i<histfrogp; i++) {
751 k = histfrog[i]->value;
752 s->name[j+0] = k>>8;
753 s->name[j+1] = k;
754 j += 2;
755 }
756 }
757
758 void
histtoauto(void)759 histtoauto(void)
760 {
761 Auto *l;
762
763 while(l = curhist) {
764 curhist = l->link;
765 l->link = curauto;
766 curauto = l;
767 }
768 }
769
770 void
collapsefrog(Sym * s)771 collapsefrog(Sym *s)
772 {
773 int i;
774
775 /*
776 * bad encoding of path components only allows
777 * MAXHIST components. if there is an overflow,
778 * first try to collapse xxx/..
779 */
780 for(i=1; i<histfrogp; i++)
781 if(strcmp(histfrog[i]->name+1, "..") == 0) {
782 memmove(histfrog+i-1, histfrog+i+1,
783 (histfrogp-i-1)*sizeof(histfrog[0]));
784 histfrogp--;
785 goto out;
786 }
787
788 /*
789 * next try to collapse .
790 */
791 for(i=0; i<histfrogp; i++)
792 if(strcmp(histfrog[i]->name+1, ".") == 0) {
793 memmove(histfrog+i, histfrog+i+1,
794 (histfrogp-i-1)*sizeof(histfrog[0]));
795 goto out;
796 }
797
798 /*
799 * last chance, just truncate from front
800 */
801 memmove(histfrog+0, histfrog+1,
802 (histfrogp-1)*sizeof(histfrog[0]));
803
804 out:
805 histfrog[histfrogp-1] = s;
806 }
807
808 void
nopout(Prog * p)809 nopout(Prog *p)
810 {
811 p->as = ANOP;
812 p->from.type = D_NONE;
813 p->to.type = D_NONE;
814 }
815
816 uchar*
readsome(int f,uchar * buf,uchar * good,uchar * stop,int max)817 readsome(int f, uchar *buf, uchar *good, uchar *stop, int max)
818 {
819 int n;
820
821 n = stop - good;
822 memmove(buf, good, stop - good);
823 stop = buf + n;
824 n = MAXIO - n;
825 if(n > max)
826 n = max;
827 n = read(f, stop, n);
828 if(n <= 0)
829 return 0;
830 return stop + n;
831 }
832
833 void
ldobj(int f,long c,char * pn)834 ldobj(int f, long c, char *pn)
835 {
836 vlong ipc;
837 Prog *p, *t;
838 uchar *bloc, *bsize, *stop;
839 int v, o, r, skip, mode;
840 Sym *h[NSYM], *s, *di;
841 ulong sig;
842 static int files;
843 static char **filen;
844 char **nfilen;
845
846 if((files&15) == 0){
847 nfilen = malloc((files+16)*sizeof(char*));
848 memmove(nfilen, filen, files*sizeof(char*));
849 free(filen);
850 filen = nfilen;
851 }
852 filen[files++] = strdup(pn);
853
854 bsize = buf.xbuf;
855 bloc = buf.xbuf;
856 di = S;
857
858 newloop:
859 memset(h, 0, sizeof(h));
860 version++;
861 histfrogp = 0;
862 ipc = pc;
863 skip = 0;
864 mode = 64;
865
866 loop:
867 if(c <= 0)
868 goto eof;
869 r = bsize - bloc;
870 if(r < 100 && r < c) { /* enough for largest prog */
871 bsize = readsome(f, buf.xbuf, bloc, bsize, c);
872 if(bsize == 0)
873 goto eof;
874 bloc = buf.xbuf;
875 goto loop;
876 }
877 o = bloc[0] | (bloc[1] << 8);
878 if(o <= AXXX || o >= ALAST) {
879 if(o < 0)
880 goto eof;
881 diag("%s: opcode out of range %d", pn, o);
882 print(" probably not a .6 file\n");
883 errorexit();
884 }
885
886 if(o == ANAME || o == ASIGNAME) {
887 sig = 0;
888 if(o == ASIGNAME) {
889 sig = bloc[2] | (bloc[3]<<8) | (bloc[4]<<16) | (bloc[5]<<24);
890 bloc += 4;
891 c -= 4;
892 }
893 stop = memchr(&bloc[4], 0, bsize-&bloc[4]);
894 if(stop == 0){
895 bsize = readsome(f, buf.xbuf, bloc, bsize, c);
896 if(bsize == 0)
897 goto eof;
898 bloc = buf.xbuf;
899 stop = memchr(&bloc[4], 0, bsize-&bloc[4]);
900 if(stop == 0){
901 fprint(2, "%s: name too long\n", pn);
902 errorexit();
903 }
904 }
905 v = bloc[2]; /* type */
906 o = bloc[3]; /* sym */
907 bloc += 4;
908 c -= 4;
909
910 r = 0;
911 if(v == D_STATIC)
912 r = version;
913 s = lookup((char*)bloc, r);
914 c -= &stop[1] - bloc;
915 bloc = stop + 1;
916
917 if(debug['S'] && r == 0)
918 sig = 1729;
919 if(sig != 0){
920 if(s->sig != 0 && s->sig != sig)
921 diag("incompatible type signatures %lux(%s) and %lux(%s) for %s", s->sig, filen[s->file], sig, pn, s->name);
922 s->sig = sig;
923 s->file = files-1;
924 }
925
926 if(debug['W'])
927 print(" ANAME %s\n", s->name);
928 h[o] = s;
929 if((v == D_EXTERN || v == D_STATIC) && s->type == 0)
930 s->type = SXREF;
931 if(v == D_FILE) {
932 if(s->type != SFILE) {
933 histgen++;
934 s->type = SFILE;
935 s->value = histgen;
936 }
937 if(histfrogp < MAXHIST) {
938 histfrog[histfrogp] = s;
939 histfrogp++;
940 } else
941 collapsefrog(s);
942 }
943 goto loop;
944 }
945
946 while(nhunk < sizeof(Prog))
947 gethunk();
948 p = (Prog*)hunk;
949 nhunk -= sizeof(Prog);
950 hunk += sizeof(Prog);
951
952 p->as = o;
953 p->line = bloc[2] | (bloc[3] << 8) | (bloc[4] << 16) | (bloc[5] << 24);
954 p->back = 2;
955 p->mode = mode;
956 r = zaddr(bloc+6, &p->from, h) + 6;
957 r += zaddr(bloc+r, &p->to, h);
958 bloc += r;
959 c -= r;
960
961 if(debug['W'])
962 print("%P\n", p);
963
964 switch(p->as) {
965 case AHISTORY:
966 if(p->to.offset == -1) {
967 addlib(pn);
968 histfrogp = 0;
969 goto loop;
970 }
971 addhist(p->line, D_FILE); /* 'z' */
972 if(p->to.offset)
973 addhist(p->to.offset, D_FILE1); /* 'Z' */
974 histfrogp = 0;
975 goto loop;
976
977 case AEND:
978 histtoauto();
979 if(curtext != P)
980 curtext->to.autom = curauto;
981 curauto = 0;
982 curtext = P;
983 if(c)
984 goto newloop;
985 return;
986
987 case AGLOBL:
988 s = p->from.sym;
989 if(s->type == 0 || s->type == SXREF) {
990 s->type = SBSS;
991 s->value = 0;
992 }
993 if(s->type != SBSS) {
994 diag("%s: redefinition: %s in %s",
995 pn, s->name, TNAME);
996 s->type = SBSS;
997 s->value = 0;
998 }
999 if(p->to.offset > s->value)
1000 s->value = p->to.offset;
1001 goto loop;
1002
1003 case ADYNT:
1004 if(p->to.sym == S) {
1005 diag("DYNT without a sym\n%P", p);
1006 break;
1007 }
1008 di = p->to.sym;
1009 p->from.scale = 4;
1010 if(di->type == SXREF) {
1011 if(debug['z'])
1012 Bprint(&bso, "%P set to %d\n", p, dtype);
1013 di->type = SCONST;
1014 di->value = dtype;
1015 dtype += 4;
1016 }
1017 if(p->from.sym == S)
1018 break;
1019
1020 p->from.offset = di->value;
1021 p->from.sym->type = SDATA;
1022 if(curtext == P) {
1023 diag("DYNT not in text: %P", p);
1024 break;
1025 }
1026 p->to.sym = curtext->from.sym;
1027 p->to.type = D_ADDR;
1028 p->to.index = D_EXTERN;
1029 goto data;
1030
1031 case AINIT:
1032 if(p->from.sym == S) {
1033 diag("INIT without a sym\n%P", p);
1034 break;
1035 }
1036 if(di == S) {
1037 diag("INIT without previous DYNT\n%P", p);
1038 break;
1039 }
1040 p->from.offset = di->value;
1041 p->from.sym->type = SDATA;
1042 goto data;
1043
1044 case ADATA:
1045 data:
1046 if(edatap == P)
1047 datap = p;
1048 else
1049 edatap->link = p;
1050 edatap = p;
1051 p->link = P;
1052 goto loop;
1053
1054 case AGOK:
1055 diag("%s: GOK opcode in %s", pn, TNAME);
1056 pc++;
1057 goto loop;
1058
1059 case ATEXT:
1060 if(curtext != P) {
1061 histtoauto();
1062 curtext->to.autom = curauto;
1063 curauto = 0;
1064 }
1065 skip = 0;
1066 curtext = p;
1067 s = p->from.sym;
1068 if(s == S) {
1069 diag("%s: no TEXT symbol: %P", pn, p);
1070 errorexit();
1071 }
1072 if(s->type != 0 && s->type != SXREF) {
1073 if(p->from.scale & DUPOK) {
1074 skip = 1;
1075 goto casdef;
1076 }
1077 diag("%s: redefinition: %s\n%P", pn, s->name, p);
1078 }
1079 s->type = STEXT;
1080 s->value = pc;
1081 lastp->link = p;
1082 lastp = p;
1083 p->pc = pc;
1084 pc++;
1085 if(textp == P) {
1086 textp = p;
1087 etextp = p;
1088 goto loop;
1089 }
1090 etextp->pcond = p;
1091 etextp = p;
1092 goto loop;
1093
1094 case AMODE:
1095 if(p->from.type == D_CONST || p->from.type == D_INDIR+D_NONE){
1096 switch((int)p->from.offset){
1097 case 16: case 32: case 64:
1098 mode = p->from.offset;
1099 break;
1100 }
1101 }
1102 goto loop;
1103
1104 case AFMOVF:
1105 case AFADDF:
1106 case AFSUBF:
1107 case AFSUBRF:
1108 case AFMULF:
1109 case AFDIVF:
1110 case AFDIVRF:
1111 case AFCOMF:
1112 case AFCOMFP:
1113 case AMOVSS:
1114 case AADDSS:
1115 case ASUBSS:
1116 case AMULSS:
1117 case ADIVSS:
1118 case ACOMISS:
1119 case AUCOMISS:
1120 if(skip)
1121 goto casdef;
1122 if(p->from.type == D_FCONST) {
1123 /* size sb 9 max */
1124 sprint(literal, "$%lux", ieeedtof(&p->from.ieee));
1125 s = lookup(literal, 0);
1126 if(s->type == 0) {
1127 s->type = SBSS;
1128 s->value = 4;
1129 t = prg();
1130 t->as = ADATA;
1131 t->line = p->line;
1132 t->from.type = D_EXTERN;
1133 t->from.sym = s;
1134 t->from.scale = 4;
1135 t->to = p->from;
1136 if(edatap == P)
1137 datap = t;
1138 else
1139 edatap->link = t;
1140 edatap = t;
1141 t->link = P;
1142 }
1143 p->from.type = D_EXTERN;
1144 p->from.sym = s;
1145 p->from.offset = 0;
1146 }
1147 goto casdef;
1148
1149 case AFMOVD:
1150 case AFADDD:
1151 case AFSUBD:
1152 case AFSUBRD:
1153 case AFMULD:
1154 case AFDIVD:
1155 case AFDIVRD:
1156 case AFCOMD:
1157 case AFCOMDP:
1158 case AMOVSD:
1159 case AADDSD:
1160 case ASUBSD:
1161 case AMULSD:
1162 case ADIVSD:
1163 case ACOMISD:
1164 case AUCOMISD:
1165 if(skip)
1166 goto casdef;
1167 if(p->from.type == D_FCONST) {
1168 /* size sb 18 max */
1169 sprint(literal, "$%lux.%lux",
1170 p->from.ieee.l, p->from.ieee.h);
1171 s = lookup(literal, 0);
1172 if(s->type == 0) {
1173 s->type = SBSS;
1174 s->value = 8;
1175 t = prg();
1176 t->as = ADATA;
1177 t->line = p->line;
1178 t->from.type = D_EXTERN;
1179 t->from.sym = s;
1180 t->from.scale = 8;
1181 t->to = p->from;
1182 if(edatap == P)
1183 datap = t;
1184 else
1185 edatap->link = t;
1186 edatap = t;
1187 t->link = P;
1188 }
1189 p->from.type = D_EXTERN;
1190 p->from.sym = s;
1191 p->from.offset = 0;
1192 }
1193 goto casdef;
1194
1195 casdef:
1196 default:
1197 if(skip)
1198 nopout(p);
1199
1200 if(p->to.type == D_BRANCH)
1201 p->to.offset += ipc;
1202 lastp->link = p;
1203 lastp = p;
1204 p->pc = pc;
1205 pc++;
1206 goto loop;
1207 }
1208 goto loop;
1209
1210 eof:
1211 diag("truncated object file: %s", pn);
1212 }
1213
1214 Sym*
lookup(char * symb,int v)1215 lookup(char *symb, int v)
1216 {
1217 Sym *s;
1218 char *p;
1219 long h;
1220 int l, c;
1221
1222 h = v;
1223 for(p=symb; c = *p; p++)
1224 h = h+h+h + c;
1225 l = (p - symb) + 1;
1226 h &= 0xffffff;
1227 h %= NHASH;
1228 for(s = hash[h]; s != S; s = s->link)
1229 if(s->version == v)
1230 if(memcmp(s->name, symb, l) == 0)
1231 return s;
1232
1233 while(nhunk < sizeof(Sym))
1234 gethunk();
1235 s = (Sym*)hunk;
1236 nhunk -= sizeof(Sym);
1237 hunk += sizeof(Sym);
1238
1239 s->name = malloc(l + 1);
1240 memmove(s->name, symb, l);
1241
1242 s->link = hash[h];
1243 s->type = 0;
1244 s->version = v;
1245 s->value = 0;
1246 s->sig = 0;
1247 hash[h] = s;
1248 nsymbol++;
1249 return s;
1250 }
1251
1252 Prog*
prg(void)1253 prg(void)
1254 {
1255 Prog *p;
1256
1257 while(nhunk < sizeof(Prog))
1258 gethunk();
1259 p = (Prog*)hunk;
1260 nhunk -= sizeof(Prog);
1261 hunk += sizeof(Prog);
1262
1263 *p = zprg;
1264 return p;
1265 }
1266
1267 Prog*
copyp(Prog * q)1268 copyp(Prog *q)
1269 {
1270 Prog *p;
1271
1272 p = prg();
1273 *p = *q;
1274 return p;
1275 }
1276
1277 Prog*
appendp(Prog * q)1278 appendp(Prog *q)
1279 {
1280 Prog *p;
1281
1282 p = prg();
1283 p->link = q->link;
1284 q->link = p;
1285 p->line = q->line;
1286 p->mode = q->mode;
1287 return p;
1288 }
1289
1290 void
gethunk(void)1291 gethunk(void)
1292 {
1293 char *h;
1294 long nh;
1295
1296 nh = NHUNK;
1297 if(thunk >= 5L*NHUNK) {
1298 nh = 5L*NHUNK;
1299 if(thunk >= 25L*NHUNK)
1300 nh = 25L*NHUNK;
1301 }
1302 h = mysbrk(nh);
1303 if(h == (char*)-1) {
1304 diag("out of memory");
1305 errorexit();
1306 }
1307 hunk = h;
1308 nhunk = nh;
1309 thunk += nh;
1310 }
1311
1312 void
doprof1(void)1313 doprof1(void)
1314 {
1315 Sym *s;
1316 long n;
1317 Prog *p, *q;
1318
1319 if(debug['v'])
1320 Bprint(&bso, "%5.2f profile 1\n", cputime());
1321 Bflush(&bso);
1322 s = lookup("__mcount", 0);
1323 n = 1;
1324 for(p = firstp->link; p != P; p = p->link) {
1325 if(p->as == ATEXT) {
1326 q = prg();
1327 q->line = p->line;
1328 q->link = datap;
1329 datap = q;
1330 q->as = ADATA;
1331 q->from.type = D_EXTERN;
1332 q->from.offset = n*4;
1333 q->from.sym = s;
1334 q->from.scale = 4;
1335 q->to = p->from;
1336 q->to.type = D_CONST;
1337
1338 q = prg();
1339 q->line = p->line;
1340 q->pc = p->pc;
1341 q->link = p->link;
1342 p->link = q;
1343 p = q;
1344 p->as = AADDL;
1345 p->from.type = D_CONST;
1346 p->from.offset = 1;
1347 p->to.type = D_EXTERN;
1348 p->to.sym = s;
1349 p->to.offset = n*4 + 4;
1350
1351 n += 2;
1352 continue;
1353 }
1354 }
1355 q = prg();
1356 q->line = 0;
1357 q->link = datap;
1358 datap = q;
1359
1360 q->as = ADATA;
1361 q->from.type = D_EXTERN;
1362 q->from.sym = s;
1363 q->from.scale = 4;
1364 q->to.type = D_CONST;
1365 q->to.offset = n;
1366
1367 s->type = SBSS;
1368 s->value = n*4;
1369 }
1370
1371 void
doprof2(void)1372 doprof2(void)
1373 {
1374 Sym *s2, *s4;
1375 Prog *p, *q, *q2, *ps2, *ps4;
1376
1377 if(debug['v'])
1378 Bprint(&bso, "%5.2f profile 2\n", cputime());
1379 Bflush(&bso);
1380
1381 if(debug['e']){
1382 s2 = lookup("_tracein", 0);
1383 s4 = lookup("_traceout", 0);
1384 }else{
1385 s2 = lookup("_profin", 0);
1386 s4 = lookup("_profout", 0);
1387 }
1388 if(s2->type != STEXT || s4->type != STEXT) {
1389 if(debug['e'])
1390 diag("_tracein/_traceout not defined %d %d", s2->type, s4->type);
1391 else
1392 diag("_profin/_profout not defined");
1393 return;
1394 }
1395
1396 ps2 = P;
1397 ps4 = P;
1398 for(p = firstp; p != P; p = p->link) {
1399 if(p->as == ATEXT) {
1400 if(p->from.sym == s2) {
1401 p->from.scale = 1;
1402 ps2 = p;
1403 }
1404 if(p->from.sym == s4) {
1405 p->from.scale = 1;
1406 ps4 = p;
1407 }
1408 }
1409 }
1410 for(p = firstp; p != P; p = p->link) {
1411 if(p->as == ATEXT) {
1412 curtext = p;
1413
1414 if(p->from.scale & NOPROF) { /* dont profile */
1415 for(;;) {
1416 q = p->link;
1417 if(q == P)
1418 break;
1419 if(q->as == ATEXT)
1420 break;
1421 p = q;
1422 }
1423 continue;
1424 }
1425
1426 /*
1427 * JMPL profin
1428 */
1429 q = prg();
1430 q->line = p->line;
1431 q->pc = p->pc;
1432 q->link = p->link;
1433 if(debug['e']){ /* embedded tracing */
1434 q2 = prg();
1435 p->link = q2;
1436 q2->link = q;
1437
1438 q2->line = p->line;
1439 q2->pc = p->pc;
1440
1441 q2->as = AJMP;
1442 q2->to.type = D_BRANCH;
1443 q2->to.sym = p->to.sym;
1444 q2->pcond = q->link;
1445 }else
1446 p->link = q;
1447 p = q;
1448 p->as = ACALL;
1449 p->to.type = D_BRANCH;
1450 p->pcond = ps2;
1451 p->to.sym = s2;
1452
1453 continue;
1454 }
1455 if(p->as == ARET) {
1456 /*
1457 * RET (default)
1458 */
1459 if(debug['e']){ /* embedded tracing */
1460 q = prg();
1461 q->line = p->line;
1462 q->pc = p->pc;
1463 q->link = p->link;
1464 p->link = q;
1465 p = q;
1466 }
1467 /*
1468 * RET
1469 */
1470 q = prg();
1471 q->as = ARET;
1472 q->from = p->from;
1473 q->to = p->to;
1474 q->link = p->link;
1475 p->link = q;
1476
1477 /*
1478 * JAL profout
1479 */
1480 p->as = ACALL;
1481 p->from = zprg.from;
1482 p->to = zprg.to;
1483 p->to.type = D_BRANCH;
1484 p->pcond = ps4;
1485 p->to.sym = s4;
1486
1487 p = q;
1488
1489 continue;
1490 }
1491 }
1492 }
1493
1494 void
nuxiinit(void)1495 nuxiinit(void)
1496 {
1497 int i, c;
1498
1499 for(i=0; i<4; i++) {
1500 c = find1(0x04030201L, i+1);
1501 if(i < 2)
1502 inuxi2[i] = c;
1503 if(i < 1)
1504 inuxi1[i] = c;
1505 inuxi4[i] = c;
1506 inuxi8[i] = c;
1507 inuxi8[i+4] = c+4;
1508 fnuxi4[i] = c;
1509 fnuxi8[i] = c;
1510 fnuxi8[i+4] = c+4;
1511 }
1512 if(debug['v']) {
1513 Bprint(&bso, "inuxi = ");
1514 for(i=0; i<1; i++)
1515 Bprint(&bso, "%d", inuxi1[i]);
1516 Bprint(&bso, " ");
1517 for(i=0; i<2; i++)
1518 Bprint(&bso, "%d", inuxi2[i]);
1519 Bprint(&bso, " ");
1520 for(i=0; i<4; i++)
1521 Bprint(&bso, "%d", inuxi4[i]);
1522 Bprint(&bso, " ");
1523 for(i=0; i<8; i++)
1524 Bprint(&bso, "%d", inuxi8[i]);
1525 Bprint(&bso, "\nfnuxi = ");
1526 for(i=0; i<4; i++)
1527 Bprint(&bso, "%d", fnuxi4[i]);
1528 Bprint(&bso, " ");
1529 for(i=0; i<8; i++)
1530 Bprint(&bso, "%d", fnuxi8[i]);
1531 Bprint(&bso, "\n");
1532 }
1533 Bflush(&bso);
1534 }
1535
1536 int
find1(long l,int c)1537 find1(long l, int c)
1538 {
1539 char *p;
1540 int i;
1541
1542 p = (char*)&l;
1543 for(i=0; i<4; i++)
1544 if(*p++ == c)
1545 return i;
1546 return 0;
1547 }
1548
1549 int
find2(long l,int c)1550 find2(long l, int c)
1551 {
1552 short *p;
1553 int i;
1554
1555 p = (short*)&l;
1556 for(i=0; i<4; i+=2) {
1557 if(((*p >> 8) & 0xff) == c)
1558 return i;
1559 if((*p++ & 0xff) == c)
1560 return i+1;
1561 }
1562 return 0;
1563 }
1564
1565 long
ieeedtof(Ieee * e)1566 ieeedtof(Ieee *e)
1567 {
1568 int exp;
1569 long v;
1570
1571 if(e->h == 0)
1572 return 0;
1573 exp = (e->h>>20) & ((1L<<11)-1L);
1574 exp -= (1L<<10) - 2L;
1575 v = (e->h & 0xfffffL) << 3;
1576 v |= (e->l >> 29) & 0x7L;
1577 if((e->l >> 28) & 1) {
1578 v++;
1579 if(v & 0x800000L) {
1580 v = (v & 0x7fffffL) >> 1;
1581 exp++;
1582 }
1583 }
1584 if(exp <= -126 || exp >= 130)
1585 diag("double fp to single fp overflow");
1586 v |= ((exp + 126) & 0xffL) << 23;
1587 v |= e->h & 0x80000000L;
1588 return v;
1589 }
1590
1591 double
ieeedtod(Ieee * ieeep)1592 ieeedtod(Ieee *ieeep)
1593 {
1594 Ieee e;
1595 double fr;
1596 int exp;
1597
1598 if(ieeep->h & (1L<<31)) {
1599 e.h = ieeep->h & ~(1L<<31);
1600 e.l = ieeep->l;
1601 return -ieeedtod(&e);
1602 }
1603 if(ieeep->l == 0 && ieeep->h == 0)
1604 return 0;
1605 fr = ieeep->l & ((1L<<16)-1L);
1606 fr /= 1L<<16;
1607 fr += (ieeep->l>>16) & ((1L<<16)-1L);
1608 fr /= 1L<<16;
1609 fr += (ieeep->h & (1L<<20)-1L) | (1L<<20);
1610 fr /= 1L<<21;
1611 exp = (ieeep->h>>20) & ((1L<<11)-1L);
1612 exp -= (1L<<10) - 2L;
1613 return ldexp(fr, exp);
1614 }
1615
1616 void
undefsym(Sym * s)1617 undefsym(Sym *s)
1618 {
1619 int n;
1620
1621 n = imports;
1622 if(s->value != 0)
1623 diag("value != 0 on SXREF");
1624 if(n >= 1<<Rindex)
1625 diag("import index %d out of range", n);
1626 s->value = n<<Roffset;
1627 s->type = SUNDEF;
1628 imports++;
1629 }
1630
1631 void
zerosig(char * sp)1632 zerosig(char *sp)
1633 {
1634 Sym *s;
1635
1636 s = lookup(sp, 0);
1637 s->sig = 0;
1638 }
1639
1640 void
readundefs(char * f,int t)1641 readundefs(char *f, int t)
1642 {
1643 int i, n;
1644 Sym *s;
1645 Biobuf *b;
1646 char *l, buf[256], *fields[64];
1647
1648 if(f == nil)
1649 return;
1650 b = Bopen(f, OREAD);
1651 if(b == nil){
1652 diag("could not open %s: %r", f);
1653 errorexit();
1654 }
1655 while((l = Brdline(b, '\n')) != nil){
1656 n = Blinelen(b);
1657 if(n >= sizeof(buf)){
1658 diag("%s: line too long", f);
1659 errorexit();
1660 }
1661 memmove(buf, l, n);
1662 buf[n-1] = '\0';
1663 n = getfields(buf, fields, nelem(fields), 1, " \t\r\n");
1664 if(n == nelem(fields)){
1665 diag("%s: bad format", f);
1666 errorexit();
1667 }
1668 for(i = 0; i < n; i++){
1669 s = lookup(fields[i], 0);
1670 s->type = SXREF;
1671 s->subtype = t;
1672 if(t == SIMPORT)
1673 nimports++;
1674 else
1675 nexports++;
1676 }
1677 }
1678 Bterm(b);
1679 }
1680