Commit | Line | Data |
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99878838 PK |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | ||
b721c131 | 3 | static char sccsid[] = "@(#)fdec.c 1.2 %G%"; |
99878838 PK |
4 | |
5 | #include "whoami.h" | |
6 | #include "0.h" | |
7 | #include "tree.h" | |
8 | #include "opcode.h" | |
9 | #include "objfmt.h" | |
10 | #include "align.h" | |
11 | ||
12 | /* | |
13 | * this array keeps the pxp counters associated with | |
14 | * functions and procedures, so that they can be output | |
15 | * when their bodies are encountered | |
16 | */ | |
17 | int bodycnts[ DSPLYSZ ]; | |
18 | ||
19 | #ifdef PC | |
20 | # include "pc.h" | |
21 | # include "pcops.h" | |
22 | #endif PC | |
23 | ||
24 | #ifdef OBJ | |
25 | int cntpatch; | |
26 | int nfppatch; | |
27 | #endif OBJ | |
28 | ||
29 | /* | |
30 | * Funchdr inserts | |
31 | * declaration of a the | |
32 | * prog/proc/func into the | |
33 | * namelist. It also handles | |
34 | * the arguments and puts out | |
35 | * a transfer which defines | |
36 | * the entry point of a procedure. | |
37 | */ | |
38 | ||
39 | struct nl * | |
40 | funchdr(r) | |
41 | int *r; | |
42 | { | |
43 | register struct nl *p; | |
44 | register *il, **rl; | |
45 | int *rll; | |
46 | struct nl *cp, *dp, *sp; | |
47 | int s, o, *pp; | |
48 | ||
49 | if (inpflist(r[2])) { | |
50 | opush('l'); | |
51 | yyretrieve(); /* kludge */ | |
52 | } | |
53 | pfcnt++; | |
54 | line = r[1]; | |
55 | if (r[3] == NIL && (p=lookup1(r[2])) != NIL && bn == cbn) { | |
56 | /* | |
57 | * Symbol already defined | |
58 | * in this block. it is either | |
59 | * a redeclared symbol (error) | |
60 | * a forward declaration, | |
61 | * or an external declaration. | |
62 | */ | |
63 | if ((p->class == FUNC || p->class == PROC) && (p->nl_flags & NFORWD) != 0) { | |
64 | /* | |
65 | * Grammar doesnt forbid | |
66 | * types on a resolution | |
67 | * of a forward function | |
68 | * declaration. | |
69 | */ | |
70 | if (p->class == FUNC && r[4]) | |
71 | error("Function type should be given only in forward declaration"); | |
72 | /* | |
73 | * get another counter for the actual | |
74 | */ | |
75 | if ( monflg ) { | |
76 | bodycnts[ cbn ] = getcnt(); | |
77 | } | |
78 | # ifdef PC | |
79 | enclosing[ cbn ] = p -> symbol; | |
80 | # endif PC | |
81 | # ifdef PTREE | |
82 | /* | |
83 | * mark this proc/func as forward | |
84 | * in the pTree. | |
85 | */ | |
86 | pDEF( p -> inTree ).PorFForward = TRUE; | |
87 | # endif PTREE | |
88 | return (p); | |
89 | } | |
90 | } | |
91 | ||
92 | /* if a routine segment is being compiled, | |
93 | * do level one processing. | |
94 | */ | |
95 | ||
96 | if ((r[0] != T_PROG) && (!progseen)) | |
97 | level1(); | |
98 | ||
99 | ||
100 | /* | |
101 | * Declare the prog/proc/func | |
102 | */ | |
103 | switch (r[0]) { | |
104 | case T_PROG: | |
105 | progseen++; | |
106 | if (opt('z')) | |
107 | monflg++; | |
108 | program = p = defnl(r[2], PROG, 0, 0); | |
109 | p->value[3] = r[1]; | |
110 | break; | |
111 | case T_PDEC: | |
112 | if (r[4] != NIL) | |
113 | error("Procedures do not have types, only functions do"); | |
114 | p = enter(defnl(r[2], PROC, 0, 0)); | |
115 | p->nl_flags |= NMOD; | |
116 | # ifdef PC | |
117 | enclosing[ cbn ] = r[2]; | |
118 | # endif PC | |
119 | break; | |
120 | case T_FDEC: | |
121 | il = r[4]; | |
122 | if (il == NIL) | |
123 | error("Function type must be specified"); | |
124 | else if (il[0] != T_TYID) { | |
125 | il = NIL; | |
126 | error("Function type can be specified only by using a type identifier"); | |
127 | } else | |
128 | il = gtype(il); | |
129 | p = enter(defnl(r[2], FUNC, il, NIL)); | |
130 | p->nl_flags |= NMOD; | |
131 | /* | |
132 | * An arbitrary restriction | |
133 | */ | |
134 | switch (o = classify(p->type)) { | |
135 | case TFILE: | |
136 | case TARY: | |
137 | case TREC: | |
138 | case TSET: | |
139 | case TSTR: | |
140 | warning(); | |
141 | if (opt('s')) | |
142 | standard(); | |
143 | error("Functions should not return %ss", clnames[o]); | |
144 | } | |
145 | # ifdef PC | |
146 | enclosing[ cbn ] = r[2]; | |
147 | # endif PC | |
148 | break; | |
149 | default: | |
150 | panic("funchdr"); | |
151 | } | |
152 | if (r[0] != T_PROG) { | |
153 | /* | |
154 | * Mark this proc/func as | |
155 | * being forward declared | |
156 | */ | |
157 | p->nl_flags |= NFORWD; | |
158 | /* | |
159 | * Enter the parameters | |
160 | * in the next block for | |
161 | * the time being | |
162 | */ | |
163 | if (++cbn >= DSPLYSZ) { | |
164 | error("Procedure/function nesting too deep"); | |
165 | pexit(ERRS); | |
166 | } | |
167 | /* | |
168 | * For functions, the function variable | |
169 | */ | |
170 | if (p->class == FUNC) { | |
171 | # ifdef OBJ | |
172 | cp = defnl(r[2], FVAR, p->type, 0); | |
173 | # endif OBJ | |
174 | # ifdef PC | |
175 | /* | |
176 | * fvars used to be allocated and deallocated | |
177 | * by the caller right before the arguments. | |
178 | * the offset of the fvar was kept in | |
179 | * value[NL_OFFS] of function (very wierd, | |
180 | * but see asgnop). | |
181 | * now, they are locals to the function | |
182 | * with the offset kept in the fvar. | |
183 | */ | |
184 | ||
185 | cp = defnl( r[2] , FVAR , p -> type | |
186 | , -( roundup( DPOFF1+width( p -> type ) | |
187 | , align( p -> type ) ) ) ); | |
188 | # endif PC | |
189 | cp->chain = p; | |
190 | p->ptr[NL_FVAR] = cp; | |
191 | } | |
192 | /* | |
193 | * Enter the parameters | |
194 | * and compute total size | |
195 | */ | |
196 | cp = sp = p; | |
197 | ||
198 | # ifdef OBJ | |
199 | o = 0; | |
200 | # endif OBJ | |
201 | # ifdef PC | |
202 | /* | |
203 | * parameters used to be allocated backwards, | |
204 | * then fixed. for pc, they are allocated correctly. | |
205 | * also, they are aligned. | |
206 | */ | |
207 | o = DPOFF2; | |
208 | # endif PC | |
209 | for (rl = r[3]; rl != NIL; rl = rl[2]) { | |
210 | p = NIL; | |
211 | if (rl[1] == NIL) | |
212 | continue; | |
213 | /* | |
214 | * Parametric procedures | |
215 | * don't have types !?! | |
216 | */ | |
217 | if (rl[1][0] != T_PPROC) { | |
218 | rll = rl[1][2]; | |
219 | if (rll[0] != T_TYID) { | |
220 | error("Types for arguments can be specified only by using type identifiers"); | |
221 | p = NIL; | |
222 | } else | |
223 | p = gtype(rll); | |
224 | } | |
225 | for (il = rl[1][1]; il != NIL; il = il[2]) { | |
226 | switch (rl[1][0]) { | |
227 | default: | |
228 | panic("funchdr2"); | |
229 | case T_PVAL: | |
230 | if (p != NIL) { | |
231 | if (p->class == FILET) | |
232 | error("Files cannot be passed by value"); | |
233 | else if (p->nl_flags & NFILES) | |
234 | error("Files cannot be a component of %ss passed by value", | |
235 | nameof(p)); | |
236 | } | |
237 | # ifdef OBJ | |
238 | dp = defnl(il[1], VAR, p, o -= even(width(p))); | |
239 | # endif OBJ | |
240 | # ifdef PC | |
241 | dp = defnl( il[1] , VAR , p | |
242 | , o = roundup( o , A_STACK ) ); | |
243 | o += width( p ); | |
244 | # endif PC | |
245 | dp->nl_flags |= NMOD; | |
246 | break; | |
247 | case T_PVAR: | |
248 | # ifdef OBJ | |
249 | dp = defnl(il[1], REF, p, o -= sizeof ( int * ) ); | |
250 | # endif OBJ | |
251 | # ifdef PC | |
252 | dp = defnl( il[1] , REF , p | |
253 | , o = roundup( o , A_STACK ) ); | |
254 | o += sizeof(char *); | |
255 | # endif PC | |
256 | break; | |
257 | case T_PFUNC: | |
258 | case T_PPROC: | |
259 | error("Procedure/function parameters not implemented"); | |
260 | continue; | |
261 | } | |
262 | if (dp != NIL) { | |
263 | cp->chain = dp; | |
264 | cp = dp; | |
265 | } | |
266 | } | |
267 | } | |
268 | cbn--; | |
269 | p = sp; | |
270 | # ifdef OBJ | |
271 | p->value[NL_OFFS] = -o+DPOFF2; | |
272 | /* | |
273 | * Correct the naivete (naievity) | |
274 | * of our above code to | |
275 | * calculate offsets | |
276 | */ | |
277 | for (il = p->chain; il != NIL; il = il->chain) | |
278 | il->value[NL_OFFS] += p->value[NL_OFFS]; | |
279 | # endif OBJ | |
280 | # ifdef PC | |
281 | p -> value[ NL_OFFS ] = o; | |
282 | # endif PC | |
283 | } else { | |
284 | /* | |
285 | * The wonderful | |
286 | * program statement! | |
287 | */ | |
288 | # ifdef OBJ | |
289 | if (monflg) { | |
290 | put(1, O_PXPBUF); | |
291 | cntpatch = put(2, O_CASE4, 0); | |
292 | nfppatch = put(2, O_CASE4, 0); | |
293 | } | |
294 | # endif OBJ | |
295 | cp = p; | |
296 | for (rl = r[3]; rl; rl = rl[2]) { | |
297 | if (rl[1] == NIL) | |
298 | continue; | |
299 | dp = defnl(rl[1], VAR, 0, 0); | |
300 | cp->chain = dp; | |
301 | cp = dp; | |
302 | } | |
303 | } | |
304 | /* | |
305 | * Define a branch at | |
306 | * the "entry point" of | |
307 | * the prog/proc/func. | |
308 | */ | |
309 | p->entloc = getlab(); | |
310 | if (monflg) { | |
311 | bodycnts[ cbn ] = getcnt(); | |
312 | p->value[ NL_CNTR ] = 0; | |
313 | } | |
314 | # ifdef OBJ | |
315 | put(2, O_TRA4, p->entloc); | |
316 | # endif OBJ | |
317 | # ifdef PTREE | |
318 | { | |
319 | pPointer PF = tCopy( r ); | |
320 | ||
321 | pSeize( PorFHeader[ nesting ] ); | |
322 | if ( r[0] != T_PROG ) { | |
323 | pPointer *PFs; | |
324 | ||
325 | PFs = &( pDEF( PorFHeader[ nesting ] ).PorFPFs ); | |
326 | *PFs = ListAppend( *PFs , PF ); | |
327 | } else { | |
328 | pDEF( PorFHeader[ nesting ] ).GlobProg = PF; | |
329 | } | |
330 | pRelease( PorFHeader[ nesting ] ); | |
331 | } | |
332 | # endif PTREE | |
333 | return (p); | |
334 | } | |
335 | ||
336 | funcfwd(fp) | |
337 | struct nl *fp; | |
338 | { | |
339 | ||
340 | /* | |
341 | * save the counter for this function | |
342 | */ | |
343 | if ( monflg ) { | |
344 | fp -> value[ NL_CNTR ] = bodycnts[ cbn ]; | |
345 | } | |
346 | return (fp); | |
347 | } | |
348 | ||
349 | /* | |
350 | * Funcext marks the procedure or | |
351 | * function external in the symbol | |
352 | * table. Funcext should only be | |
353 | * called if PC, and is an error | |
354 | * otherwise. | |
355 | */ | |
356 | ||
357 | funcext(fp) | |
358 | struct nl *fp; | |
359 | { | |
360 | ||
361 | #ifdef PC | |
362 | if (opt('s')) { | |
363 | standard(); | |
364 | error("External procedures and functions are not standard"); | |
365 | } else { | |
366 | if (cbn == 1) { | |
367 | fp->ext_flags |= NEXTERN; | |
b721c131 | 368 | stabefunc( fp -> symbol , fp -> class , line ); |
99878838 PK |
369 | } |
370 | else | |
371 | error("External procedures and functions can only be declared at the outermost level."); | |
372 | } | |
373 | #endif PC | |
374 | #ifdef OBJ | |
375 | error("Procedures or functions cannot be declared external."); | |
376 | #endif OBJ | |
377 | ||
378 | return(fp); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Funcbody is called | |
383 | * when the actual (resolved) | |
384 | * declaration of a procedure is | |
385 | * encountered. It puts the names | |
386 | * of the (function) and parameters | |
387 | * into the symbol table. | |
388 | */ | |
389 | funcbody(fp) | |
390 | struct nl *fp; | |
391 | { | |
392 | register struct nl *q, *p; | |
393 | ||
394 | cbn++; | |
395 | if (cbn >= DSPLYSZ) { | |
396 | error("Too many levels of function/procedure nesting"); | |
397 | pexit(ERRS); | |
398 | } | |
399 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
400 | gotos[cbn] = NIL; | |
401 | errcnt[cbn] = syneflg; | |
402 | parts = NIL; | |
403 | dfiles[ cbn ] = FALSE; | |
404 | if (fp == NIL) | |
405 | return (NIL); | |
406 | /* | |
407 | * Save the virtual name | |
408 | * list stack pointer so | |
409 | * the space can be freed | |
410 | * later (funcend). | |
411 | */ | |
412 | fp->ptr[2] = nlp; | |
413 | # ifdef PC | |
414 | if ( fp -> class != PROG ) { | |
b721c131 | 415 | stabfunc( fp -> symbol , fp -> class , line , cbn - 1 ); |
99878838 | 416 | } else { |
b721c131 | 417 | stabfunc( "program" , fp -> class , line , 0 ); |
99878838 PK |
418 | } |
419 | # endif PC | |
420 | if (fp->class != PROG) { | |
421 | for (q = fp->chain; q != NIL; q = q->chain) { | |
422 | enter(q); | |
423 | # ifdef PC | |
424 | stabparam( q -> symbol , p2type( q -> type ) | |
425 | , q -> value[ NL_OFFS ] | |
426 | , lwidth( q -> type ) ); | |
427 | # endif PC | |
428 | } | |
429 | } | |
430 | if (fp->class == FUNC) { | |
431 | /* | |
432 | * For functions, enter the fvar | |
433 | */ | |
434 | enter(fp->ptr[NL_FVAR]); | |
435 | # ifdef PC | |
436 | q = fp -> ptr[ NL_FVAR ]; | |
437 | sizes[cbn].om_off -= lwidth( q -> type ); | |
438 | sizes[cbn].om_max = sizes[cbn].om_off; | |
b721c131 PK |
439 | stabvar( q -> symbol , p2type( q -> type ) , cbn |
440 | , q -> value[ NL_OFFS ] , lwidth( q -> type ) | |
441 | , line ); | |
99878838 PK |
442 | # endif PC |
443 | } | |
444 | # ifdef PTREE | |
445 | /* | |
446 | * pick up the pointer to porf declaration | |
447 | */ | |
448 | PorFHeader[ ++nesting ] = fp -> inTree; | |
449 | # endif PTREE | |
450 | return (fp); | |
451 | } | |
452 | ||
453 | struct nl *Fp; | |
454 | int pnumcnt; | |
455 | /* | |
456 | * Funcend is called to | |
457 | * finish a block by generating | |
458 | * the code for the statements. | |
459 | * It then looks for unresolved declarations | |
460 | * of labels, procedures and functions, | |
461 | * and cleans up the name list. | |
462 | * For the program, it checks the | |
463 | * semantics of the program | |
464 | * statement (yuchh). | |
465 | */ | |
466 | funcend(fp, bundle, endline) | |
467 | struct nl *fp; | |
468 | int *bundle; | |
469 | int endline; | |
470 | { | |
471 | register struct nl *p; | |
472 | register int i, b; | |
473 | int var, inp, out, chkref, *blk; | |
474 | struct nl *iop; | |
475 | char *cp; | |
476 | extern int cntstat; | |
477 | # ifdef PC | |
478 | int toplabel = getlab(); | |
479 | int botlabel = getlab(); | |
480 | # endif PC | |
481 | ||
482 | cntstat = 0; | |
483 | /* | |
484 | * yyoutline(); | |
485 | */ | |
486 | if (program != NIL) | |
487 | line = program->value[3]; | |
488 | blk = bundle[2]; | |
489 | if (fp == NIL) { | |
490 | cbn--; | |
491 | # ifdef PTREE | |
492 | nesting--; | |
493 | # endif PTREE | |
494 | return; | |
495 | } | |
496 | #ifdef OBJ | |
497 | /* | |
498 | * Patch the branch to the | |
499 | * entry point of the function | |
500 | */ | |
501 | patch4(fp->entloc); | |
502 | /* | |
503 | * Put out the block entrance code and the block name. | |
504 | * the CONG is overlaid by a patch later! | |
505 | */ | |
506 | var = put(2, (lenstr(fp->symbol,0) << 8) | |
507 | | (cbn == 1 && opt('p') == 0 ? O_NODUMP: O_BEG), 0); | |
508 | put(2, O_CASE2, bundle[1]); | |
509 | putstr(fp->symbol, 0); | |
510 | #endif OBJ | |
511 | #ifdef PC | |
512 | /* | |
513 | * put out the procedure entry code | |
514 | */ | |
515 | if ( fp -> class == PROG ) { | |
516 | putprintf( " .text" , 0 ); | |
517 | putprintf( " .align 1" , 0 ); | |
518 | putprintf( " .globl _main" , 0 ); | |
519 | putprintf( "_main:" , 0 ); | |
520 | putprintf( " .word 0" , 0 ); | |
521 | putprintf( " calls $0,_PCSTART" , 0 ); | |
522 | putprintf( " movl 4(ap),__argc" , 0 ); | |
523 | putprintf( " movl 8(ap),__argv" , 0 ); | |
524 | putprintf( " calls $0,_program" , 0 ); | |
525 | putprintf( " calls $0,_PCEXIT" , 0 ); | |
526 | ftnno = fp -> entloc; | |
527 | putprintf( " .text" , 0 ); | |
528 | putprintf( " .align 1" , 0 ); | |
529 | putprintf( " .globl _program" , 0 ); | |
530 | putprintf( "_program:" , 0 ); | |
531 | } else { | |
532 | ftnno = fp -> entloc; | |
533 | putprintf( " .text" , 0 ); | |
534 | putprintf( " .align 1" , 0 ); | |
535 | putprintf( " .globl " , 1 ); | |
536 | for ( i = 1 ; i < cbn ; i++ ) { | |
537 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
538 | } | |
539 | putprintf( "" , 0 ); | |
540 | for ( i = 1 ; i < cbn ; i++ ) { | |
541 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
542 | } | |
543 | putprintf( ":" , 0 ); | |
544 | } | |
545 | stablbrac( cbn ); | |
546 | /* | |
547 | * register save mask | |
548 | */ | |
549 | if ( opt( 't' ) ) { | |
550 | putprintf( " .word 0x%x" , 0 , RUNCHECK | RSAVEMASK ); | |
551 | } else { | |
552 | putprintf( " .word 0x%x" , 0 , RSAVEMASK ); | |
553 | } | |
554 | putjbr( botlabel ); | |
555 | putlab( toplabel ); | |
556 | if ( profflag ) { | |
557 | /* | |
558 | * call mcount for profiling | |
559 | */ | |
560 | putprintf( " moval 1f,r0" , 0 ); | |
561 | putprintf( " jsb mcount" , 0 ); | |
562 | putprintf( " .data" , 0 ); | |
563 | putprintf( " .align 2" , 0 ); | |
564 | putprintf( "1:" , 0 ); | |
565 | putprintf( " .long 0" , 0 ); | |
566 | putprintf( " .text" , 0 ); | |
567 | } | |
568 | /* | |
569 | * set up unwind exception vector. | |
570 | */ | |
571 | putprintf( " moval %s,%d(%s)" , 0 | |
572 | , UNWINDNAME , UNWINDOFFSET , P2FPNAME ); | |
573 | /* | |
574 | * save address of display entry, for unwind. | |
575 | */ | |
576 | putprintf( " moval %s+%d,%d(%s)" , 0 | |
577 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
578 | , DPTROFFSET , P2FPNAME ); | |
579 | /* | |
580 | * save old display | |
581 | */ | |
582 | putprintf( " movq %s+%d,%d(%s)" , 0 | |
583 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
584 | , DSAVEOFFSET , P2FPNAME ); | |
585 | /* | |
586 | * set up new display by saving AP and FP in appropriate | |
587 | * slot in display structure. | |
588 | */ | |
589 | putprintf( " movq %s,%s+%d" , 0 | |
590 | , P2APNAME , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
591 | /* | |
592 | * ask second pass to allocate known locals | |
593 | */ | |
594 | putlbracket( ftnno , -sizes[ cbn ].om_max ); | |
595 | /* | |
596 | * and zero them if checking is on | |
597 | * by calling zframe( bytes of locals , highest local address ); | |
598 | */ | |
599 | if ( opt( 't' ) && ( -sizes[ cbn ].om_max ) > DPOFF1 ) { | |
600 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
601 | , "_ZFRAME" ); | |
602 | putleaf( P2ICON , ( -sizes[ cbn ].om_max ) - DPOFF1 | |
603 | , 0 , P2INT , 0 ); | |
604 | putLV( 0 , cbn , sizes[ cbn ].om_max , P2CHAR ); | |
605 | putop( P2LISTOP , P2INT ); | |
606 | putop( P2CALL , P2INT ); | |
607 | putdot( filename , line ); | |
608 | } | |
609 | #endif PC | |
610 | if ( monflg ) { | |
611 | if ( fp -> value[ NL_CNTR ] != 0 ) { | |
612 | inccnt( fp -> value [ NL_CNTR ] ); | |
613 | } | |
614 | inccnt( bodycnts[ fp -> nl_block & 037 ] ); | |
615 | } | |
616 | if (fp->class == PROG) { | |
617 | /* | |
618 | * The glorious buffers option. | |
619 | * 0 = don't buffer output | |
620 | * 1 = line buffer output | |
621 | * 2 = 512 byte buffer output | |
622 | */ | |
623 | # ifdef OBJ | |
624 | if (opt('b') != 1) | |
625 | put(1, O_BUFF | opt('b') << 8); | |
626 | # endif OBJ | |
627 | # ifdef PC | |
628 | if ( opt( 'b' ) != 1 ) { | |
629 | putleaf( P2ICON , 0 , 0 | |
630 | , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_BUFF" ); | |
631 | putleaf( P2ICON , opt( 'b' ) , 0 , P2INT , 0 ); | |
632 | putop( P2CALL , P2INT ); | |
633 | putdot( filename , line ); | |
634 | } | |
635 | # endif PC | |
636 | out = 0; | |
637 | for (p = fp->chain; p != NIL; p = p->chain) { | |
638 | if (strcmp(p->symbol, "input") == 0) { | |
639 | inp++; | |
640 | continue; | |
641 | } | |
642 | if (strcmp(p->symbol, "output") == 0) { | |
643 | out++; | |
644 | continue; | |
645 | } | |
646 | iop = lookup1(p->symbol); | |
647 | if (iop == NIL || bn != cbn) { | |
648 | error("File %s listed in program statement but not declared", p->symbol); | |
649 | continue; | |
650 | } | |
651 | if (iop->class != VAR) { | |
652 | error("File %s listed in program statement but declared as a %s", p->symbol, classes[iop->class]); | |
653 | continue; | |
654 | } | |
655 | if (iop->type == NIL) | |
656 | continue; | |
657 | if (iop->type->class != FILET) { | |
658 | error("File %s listed in program statement but defined as %s", | |
659 | p->symbol, nameof(iop->type)); | |
660 | continue; | |
661 | } | |
662 | # ifdef OBJ | |
663 | put(2, O_LV | bn << 8+INDX, iop->value[NL_OFFS]); | |
664 | i = lenstr(p->symbol,0); | |
665 | put(2, O_LVCON, i); | |
666 | putstr(p->symbol, 0); | |
667 | do { | |
668 | i--; | |
669 | } while (p->symbol+i == 0); | |
670 | put(2, O_CON24, i+1); | |
671 | put(2, O_CON24, text(iop->type) ? 0 : width(iop->type->type)); | |
672 | put(1, O_DEFNAME); | |
673 | # endif OBJ | |
674 | # ifdef PC | |
675 | putleaf( P2ICON , 0 , 0 | |
676 | , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
677 | , "_DEFNAME" ); | |
678 | putLV( p -> symbol , bn , iop -> value[NL_OFFS] | |
679 | , p2type( iop ) ); | |
680 | putCONG( p -> symbol , strlen( p -> symbol ) | |
681 | , LREQ ); | |
682 | putop( P2LISTOP , P2INT ); | |
683 | putleaf( P2ICON , strlen( p -> symbol ) | |
684 | , 0 , P2INT , 0 ); | |
685 | putop( P2LISTOP , P2INT ); | |
686 | putleaf( P2ICON | |
687 | , text(iop->type) ? 0 : width(iop->type->type) | |
688 | , 0 , P2INT , 0 ); | |
689 | putop( P2LISTOP , P2INT ); | |
690 | putop( P2CALL , P2INT ); | |
691 | putdot( filename , line ); | |
692 | # endif PC | |
693 | } | |
694 | if (out == 0 && fp->chain != NIL) { | |
695 | recovered(); | |
696 | error("The file output must appear in the program statement file list"); | |
697 | } | |
698 | } | |
699 | /* | |
700 | * Process the prog/proc/func body | |
701 | */ | |
702 | noreach = 0; | |
703 | line = bundle[1]; | |
704 | statlist(blk); | |
705 | # ifdef PTREE | |
706 | { | |
707 | pPointer Body = tCopy( blk ); | |
708 | ||
709 | pDEF( PorFHeader[ nesting -- ] ).PorFBody = Body; | |
710 | } | |
711 | # endif PTREE | |
712 | # ifdef OBJ | |
713 | if (cbn== 1 && monflg != 0) { | |
714 | patchfil(cntpatch - 2, cnts, 2); | |
715 | patchfil(nfppatch - 2, pfcnt, 2); | |
716 | } | |
717 | # endif OBJ | |
718 | # ifdef PC | |
719 | if ( fp -> class == PROG && monflg ) { | |
720 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
721 | , "_PMFLUSH" ); | |
722 | putleaf( P2ICON , cnts , 0 , P2INT , 0 ); | |
723 | putleaf( P2ICON , pfcnt , 0 , P2INT , 0 ); | |
724 | putop( P2LISTOP , P2INT ); | |
725 | putop( P2CALL , P2INT ); | |
726 | putdot( filename , line ); | |
727 | } | |
728 | # endif PC | |
729 | if (fp->class == PROG && inp == 0 && (input->nl_flags & (NUSED|NMOD)) != 0) { | |
730 | recovered(); | |
731 | error("Input is used but not defined in the program statement"); | |
732 | } | |
733 | /* | |
734 | * Clean up the symbol table displays and check for unresolves | |
735 | */ | |
736 | line = endline; | |
737 | b = cbn; | |
738 | Fp = fp; | |
739 | chkref = syneflg == errcnt[cbn] && opt('w') == 0; | |
740 | for (i = 0; i <= 077; i++) { | |
741 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
742 | /* | |
743 | * Check for variables defined | |
744 | * but not referenced | |
745 | */ | |
746 | if (chkref && p->symbol != NIL) | |
747 | switch (p->class) { | |
748 | case FIELD: | |
749 | /* | |
750 | * If the corresponding record is | |
751 | * unused, we shouldn't complain about | |
752 | * the fields. | |
753 | */ | |
754 | default: | |
755 | if ((p->nl_flags & (NUSED|NMOD)) == 0) { | |
756 | warning(); | |
757 | nerror("%s %s is neither used nor set", classes[p->class], p->symbol); | |
758 | break; | |
759 | } | |
760 | /* | |
761 | * If a var parameter is either | |
762 | * modified or used that is enough. | |
763 | */ | |
764 | if (p->class == REF) | |
765 | continue; | |
766 | # ifdef OBJ | |
767 | if ((p->nl_flags & NUSED) == 0) { | |
768 | warning(); | |
769 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
770 | break; | |
771 | } | |
772 | # endif OBJ | |
773 | # ifdef PC | |
774 | if (((p->nl_flags & NUSED) == 0) && ((p->ext_flags & NEXTERN) == 0)) { | |
775 | warning(); | |
776 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
777 | break; | |
778 | } | |
779 | # endif PC | |
780 | if ((p->nl_flags & NMOD) == 0) { | |
781 | warning(); | |
782 | nerror("%s %s is used but never set", classes[p->class], p->symbol); | |
783 | break; | |
784 | } | |
785 | case LABEL: | |
786 | case FVAR: | |
787 | case BADUSE: | |
788 | break; | |
789 | } | |
790 | switch (p->class) { | |
791 | case BADUSE: | |
792 | cp = "s"; | |
793 | if (p->chain->ud_next == NIL) | |
794 | cp++; | |
795 | eholdnl(); | |
796 | if (p->value[NL_KINDS] & ISUNDEF) | |
797 | nerror("%s undefined on line%s", p->symbol, cp); | |
798 | else | |
799 | nerror("%s improperly used on line%s", p->symbol, cp); | |
800 | pnumcnt = 10; | |
801 | pnums(p->chain); | |
802 | pchr('\n'); | |
803 | break; | |
804 | ||
805 | case FUNC: | |
806 | case PROC: | |
807 | # ifdef OBJ | |
808 | if ((p->nl_flags & NFORWD)) | |
809 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
810 | # endif OBJ | |
811 | # ifdef PC | |
812 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
813 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
814 | # endif PC | |
815 | break; | |
816 | ||
817 | case LABEL: | |
818 | if (p->nl_flags & NFORWD) | |
819 | nerror("label %s was declared but not defined", p->symbol); | |
820 | break; | |
821 | case FVAR: | |
822 | if ((p->nl_flags & NMOD) == 0) | |
823 | nerror("No assignment to the function variable"); | |
824 | break; | |
825 | } | |
826 | } | |
827 | /* | |
828 | * Pop this symbol | |
829 | * table slot | |
830 | */ | |
831 | disptab[i] = p; | |
832 | } | |
833 | ||
834 | # ifdef OBJ | |
835 | put(1, O_END); | |
836 | # endif OBJ | |
837 | # ifdef PC | |
838 | /* | |
839 | * if there were file variables declared at this level | |
840 | * call pclose( &__disply[ cbn ] ) to clean them up. | |
841 | */ | |
842 | if ( dfiles[ cbn ] ) { | |
843 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
844 | , "_PCLOSE" ); | |
845 | putRV( DISPLAYNAME , 0 , cbn * sizeof( struct dispsave ) | |
846 | , P2PTR | P2CHAR ); | |
847 | putop( P2CALL , P2INT ); | |
848 | putdot( filename , line ); | |
849 | } | |
850 | /* | |
851 | * if this is a function, | |
852 | * the function variable is the return value. | |
853 | * if it's a scalar valued function, return scalar, | |
854 | * else, return a pointer to the structure value. | |
855 | */ | |
856 | if ( fp -> class == FUNC ) { | |
857 | struct nl *fvar = fp -> ptr[ NL_FVAR ]; | |
858 | long fvartype = p2type( fvar -> type ); | |
859 | ||
860 | switch ( classify( fvar -> type ) ) { | |
861 | case TBOOL: | |
862 | case TCHAR: | |
863 | case TINT: | |
864 | case TSCAL: | |
865 | case TDOUBLE: | |
866 | case TPTR: | |
867 | putRV( fvar -> symbol , ( fvar -> nl_block ) & 037 | |
868 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
869 | break; | |
870 | default: | |
871 | putLV( fvar -> symbol , ( fvar -> nl_block ) & 037 | |
872 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
873 | break; | |
874 | } | |
875 | putop( P2FORCE , fvartype ); | |
876 | putdot( filename , line ); | |
877 | } | |
878 | /* | |
879 | * restore old display entry from save area | |
880 | */ | |
881 | ||
882 | putprintf( " movq %d(%s),%s+%d" , 0 | |
883 | , DSAVEOFFSET , P2FPNAME | |
884 | , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
885 | stabrbrac( cbn ); | |
886 | putprintf( " ret" , 0 ); | |
887 | /* | |
888 | * let the second pass allocate locals | |
889 | */ | |
890 | putlab( botlabel ); | |
891 | putprintf( " subl2 $LF%d,sp" , 0 , ftnno ); | |
892 | putrbracket( ftnno ); | |
893 | putjbr( toplabel ); | |
894 | /* | |
895 | * declare pcp counters, if any | |
896 | */ | |
897 | if ( monflg && fp -> class == PROG ) { | |
898 | putprintf( " .data" , 0 ); | |
899 | putprintf( " .comm " , 1 ); | |
900 | putprintf( PCPCOUNT , 1 ); | |
901 | putprintf( ",%d" , 0 , ( cnts + 1 ) * sizeof (long) ); | |
902 | putprintf( " .text" , 0 ); | |
903 | } | |
904 | # endif PC | |
905 | #ifdef DEBUG | |
906 | dumpnl(fp->ptr[2], fp->symbol); | |
907 | #endif | |
908 | /* | |
909 | * Restore the | |
910 | * (virtual) name list | |
911 | * position | |
912 | */ | |
913 | nlfree(fp->ptr[2]); | |
914 | /* | |
915 | * Proc/func has been | |
916 | * resolved | |
917 | */ | |
918 | fp->nl_flags &= ~NFORWD; | |
919 | /* | |
920 | * Patch the beg | |
921 | * of the proc/func to | |
922 | * the proper variable size | |
923 | */ | |
924 | if (Fp == NIL) | |
925 | elineon(); | |
926 | # ifdef OBJ | |
927 | patchfil(var, sizes[cbn].om_max, 2); | |
928 | # endif OBJ | |
929 | cbn--; | |
930 | if (inpflist(fp->symbol)) { | |
931 | opop('l'); | |
932 | } | |
933 | } | |
934 | ||
935 | ||
936 | /* | |
937 | * Segend is called to check for | |
938 | * unresolved variables, funcs and | |
939 | * procs, and deliver unresolved and | |
940 | * baduse error diagnostics at the | |
941 | * end of a routine segment (a separately | |
942 | * compiled segment that is not the | |
943 | * main program) for PC. This | |
944 | * routine should only be called | |
945 | * by PC (not standard). | |
946 | */ | |
947 | segend() | |
948 | { | |
949 | register struct nl *p; | |
950 | register int i,b; | |
951 | char *cp; | |
952 | ||
953 | #ifdef PC | |
954 | if (opt('s')) { | |
955 | standard(); | |
956 | error("Separately compiled routine segments are not standard."); | |
957 | } else { | |
958 | b = cbn; | |
959 | for (i=0; i<077; i++) { | |
960 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
961 | switch (p->class) { | |
962 | case BADUSE: | |
963 | cp = 's'; | |
964 | if (p->chain->ud_next == NIL) | |
965 | cp++; | |
966 | eholdnl(); | |
967 | if (p->value[NL_KINDS] & ISUNDEF) | |
968 | nerror("%s undefined on line%s", p->symbol, cp); | |
969 | else | |
970 | nerror("%s improperly used on line%s", p->symbol, cp); | |
971 | pnumcnt = 10; | |
972 | pnums(p->chain); | |
973 | pchr('\n'); | |
974 | break; | |
975 | ||
976 | case FUNC: | |
977 | case PROC: | |
978 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
979 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
980 | break; | |
981 | ||
982 | case FVAR: | |
983 | if (((p->nl_flags & NMOD) == 0) && ((p->chain->ext_flags & NEXTERN) == 0)) | |
984 | nerror("No assignment to the function variable"); | |
985 | break; | |
986 | } | |
987 | } | |
988 | disptab[i] = p; | |
989 | } | |
990 | } | |
991 | #endif PC | |
992 | #ifdef OBJ | |
993 | error("Missing program statement and program body"); | |
994 | #endif OBJ | |
995 | ||
996 | } | |
997 | ||
998 | ||
999 | /* | |
1000 | * Level1 does level one processing for | |
1001 | * separately compiled routine segments | |
1002 | */ | |
1003 | level1() | |
1004 | { | |
1005 | ||
1006 | # ifdef OBJ | |
1007 | error("Missing program statement"); | |
1008 | # endif OBJ | |
1009 | # ifdef PC | |
1010 | if (opt('s')) { | |
1011 | standard(); | |
1012 | error("Missing program statement"); | |
1013 | } | |
1014 | # endif PC | |
1015 | ||
1016 | cbn++; | |
1017 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
1018 | parts = NIL; | |
1019 | progseen++; | |
1020 | } | |
1021 | ||
1022 | ||
1023 | ||
1024 | pnums(p) | |
1025 | struct udinfo *p; | |
1026 | { | |
1027 | ||
1028 | if (p->ud_next != NIL) | |
1029 | pnums(p->ud_next); | |
1030 | if (pnumcnt == 0) { | |
1031 | printf("\n\t"); | |
1032 | pnumcnt = 20; | |
1033 | } | |
1034 | pnumcnt--; | |
1035 | printf(" %d", p->ud_line); | |
1036 | } | |
1037 | ||
1038 | nerror(a1, a2, a3) | |
1039 | { | |
1040 | ||
1041 | if (Fp != NIL) { | |
1042 | yySsync(); | |
1043 | #ifndef PI1 | |
1044 | if (opt('l')) | |
1045 | yyoutline(); | |
1046 | #endif | |
1047 | yysetfile(filename); | |
1048 | printf("In %s %s:\n", classes[Fp->class], Fp->symbol); | |
1049 | Fp = NIL; | |
1050 | elineoff(); | |
1051 | } | |
1052 | error(a1, a2, a3); | |
1053 | } |