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99878838 PK |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | ||
31cef89c | 3 | static char sccsid[] = "@(#)fdec.c 1.7 10/28/80"; |
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++; | |
af97bcfa | 54 | parts[ cbn ] |= RPRT; |
99878838 PK |
55 | line = r[1]; |
56 | if (r[3] == NIL && (p=lookup1(r[2])) != NIL && bn == cbn) { | |
57 | /* | |
58 | * Symbol already defined | |
59 | * in this block. it is either | |
60 | * a redeclared symbol (error) | |
61 | * a forward declaration, | |
62 | * or an external declaration. | |
63 | */ | |
64 | if ((p->class == FUNC || p->class == PROC) && (p->nl_flags & NFORWD) != 0) { | |
65 | /* | |
66 | * Grammar doesnt forbid | |
67 | * types on a resolution | |
68 | * of a forward function | |
69 | * declaration. | |
70 | */ | |
71 | if (p->class == FUNC && r[4]) | |
72 | error("Function type should be given only in forward declaration"); | |
73 | /* | |
74 | * get another counter for the actual | |
75 | */ | |
76 | if ( monflg ) { | |
77 | bodycnts[ cbn ] = getcnt(); | |
78 | } | |
79 | # ifdef PC | |
80 | enclosing[ cbn ] = p -> symbol; | |
81 | # endif PC | |
82 | # ifdef PTREE | |
83 | /* | |
84 | * mark this proc/func as forward | |
85 | * in the pTree. | |
86 | */ | |
87 | pDEF( p -> inTree ).PorFForward = TRUE; | |
88 | # endif PTREE | |
89 | return (p); | |
90 | } | |
91 | } | |
92 | ||
93 | /* if a routine segment is being compiled, | |
94 | * do level one processing. | |
95 | */ | |
96 | ||
97 | if ((r[0] != T_PROG) && (!progseen)) | |
98 | level1(); | |
99 | ||
100 | ||
101 | /* | |
102 | * Declare the prog/proc/func | |
103 | */ | |
104 | switch (r[0]) { | |
105 | case T_PROG: | |
106 | progseen++; | |
107 | if (opt('z')) | |
108 | monflg++; | |
109 | program = p = defnl(r[2], PROG, 0, 0); | |
110 | p->value[3] = r[1]; | |
111 | break; | |
112 | case T_PDEC: | |
113 | if (r[4] != NIL) | |
114 | error("Procedures do not have types, only functions do"); | |
115 | p = enter(defnl(r[2], PROC, 0, 0)); | |
116 | p->nl_flags |= NMOD; | |
117 | # ifdef PC | |
118 | enclosing[ cbn ] = r[2]; | |
119 | # endif PC | |
120 | break; | |
121 | case T_FDEC: | |
122 | il = r[4]; | |
123 | if (il == NIL) | |
124 | error("Function type must be specified"); | |
125 | else if (il[0] != T_TYID) { | |
126 | il = NIL; | |
127 | error("Function type can be specified only by using a type identifier"); | |
128 | } else | |
129 | il = gtype(il); | |
130 | p = enter(defnl(r[2], FUNC, il, NIL)); | |
131 | p->nl_flags |= NMOD; | |
132 | /* | |
133 | * An arbitrary restriction | |
134 | */ | |
135 | switch (o = classify(p->type)) { | |
136 | case TFILE: | |
137 | case TARY: | |
138 | case TREC: | |
139 | case TSET: | |
140 | case TSTR: | |
21a689f9 | 141 | warning(); |
c4e911b6 | 142 | if (opt('s')) { |
99878838 | 143 | standard(); |
c4e911b6 | 144 | } |
21a689f9 | 145 | error("Functions should not return %ss", clnames[o]); |
99878838 PK |
146 | } |
147 | # ifdef PC | |
148 | enclosing[ cbn ] = r[2]; | |
149 | # endif PC | |
150 | break; | |
151 | default: | |
152 | panic("funchdr"); | |
153 | } | |
154 | if (r[0] != T_PROG) { | |
155 | /* | |
156 | * Mark this proc/func as | |
157 | * being forward declared | |
158 | */ | |
159 | p->nl_flags |= NFORWD; | |
160 | /* | |
161 | * Enter the parameters | |
162 | * in the next block for | |
163 | * the time being | |
164 | */ | |
165 | if (++cbn >= DSPLYSZ) { | |
166 | error("Procedure/function nesting too deep"); | |
167 | pexit(ERRS); | |
168 | } | |
169 | /* | |
170 | * For functions, the function variable | |
171 | */ | |
172 | if (p->class == FUNC) { | |
173 | # ifdef OBJ | |
174 | cp = defnl(r[2], FVAR, p->type, 0); | |
175 | # endif OBJ | |
176 | # ifdef PC | |
177 | /* | |
178 | * fvars used to be allocated and deallocated | |
179 | * by the caller right before the arguments. | |
180 | * the offset of the fvar was kept in | |
181 | * value[NL_OFFS] of function (very wierd, | |
182 | * but see asgnop). | |
183 | * now, they are locals to the function | |
184 | * with the offset kept in the fvar. | |
185 | */ | |
186 | ||
187 | cp = defnl( r[2] , FVAR , p -> type | |
188 | , -( roundup( DPOFF1+width( p -> type ) | |
189 | , align( p -> type ) ) ) ); | |
190 | # endif PC | |
191 | cp->chain = p; | |
192 | p->ptr[NL_FVAR] = cp; | |
193 | } | |
194 | /* | |
195 | * Enter the parameters | |
196 | * and compute total size | |
197 | */ | |
198 | cp = sp = p; | |
199 | ||
200 | # ifdef OBJ | |
201 | o = 0; | |
202 | # endif OBJ | |
203 | # ifdef PC | |
204 | /* | |
205 | * parameters used to be allocated backwards, | |
206 | * then fixed. for pc, they are allocated correctly. | |
207 | * also, they are aligned. | |
208 | */ | |
209 | o = DPOFF2; | |
210 | # endif PC | |
211 | for (rl = r[3]; rl != NIL; rl = rl[2]) { | |
212 | p = NIL; | |
213 | if (rl[1] == NIL) | |
214 | continue; | |
215 | /* | |
216 | * Parametric procedures | |
217 | * don't have types !?! | |
218 | */ | |
219 | if (rl[1][0] != T_PPROC) { | |
220 | rll = rl[1][2]; | |
221 | if (rll[0] != T_TYID) { | |
222 | error("Types for arguments can be specified only by using type identifiers"); | |
223 | p = NIL; | |
224 | } else | |
225 | p = gtype(rll); | |
226 | } | |
227 | for (il = rl[1][1]; il != NIL; il = il[2]) { | |
228 | switch (rl[1][0]) { | |
229 | default: | |
230 | panic("funchdr2"); | |
231 | case T_PVAL: | |
232 | if (p != NIL) { | |
233 | if (p->class == FILET) | |
234 | error("Files cannot be passed by value"); | |
235 | else if (p->nl_flags & NFILES) | |
236 | error("Files cannot be a component of %ss passed by value", | |
237 | nameof(p)); | |
238 | } | |
239 | # ifdef OBJ | |
240 | dp = defnl(il[1], VAR, p, o -= even(width(p))); | |
241 | # endif OBJ | |
242 | # ifdef PC | |
243 | dp = defnl( il[1] , VAR , p | |
244 | , o = roundup( o , A_STACK ) ); | |
245 | o += width( p ); | |
246 | # endif PC | |
247 | dp->nl_flags |= NMOD; | |
248 | break; | |
249 | case T_PVAR: | |
250 | # ifdef OBJ | |
251 | dp = defnl(il[1], REF, p, o -= sizeof ( int * ) ); | |
252 | # endif OBJ | |
253 | # ifdef PC | |
254 | dp = defnl( il[1] , REF , p | |
255 | , o = roundup( o , A_STACK ) ); | |
256 | o += sizeof(char *); | |
257 | # endif PC | |
258 | break; | |
259 | case T_PFUNC: | |
c4e911b6 PK |
260 | # ifdef OBJ |
261 | dp = defnl(il[1], FFUNC, p, o -= sizeof ( int * ) ); | |
262 | # endif OBJ | |
263 | # ifdef PC | |
264 | dp = defnl( il[1] , FFUNC , p | |
265 | , o = roundup( o , A_STACK ) ); | |
266 | o += sizeof(char *); | |
267 | # endif PC | |
268 | dp -> nl_flags |= NMOD; | |
269 | break; | |
99878838 | 270 | case T_PPROC: |
c4e911b6 PK |
271 | # ifdef OBJ |
272 | dp = defnl(il[1], FPROC, p, o -= sizeof ( int * ) ); | |
273 | # endif OBJ | |
274 | # ifdef PC | |
275 | dp = defnl( il[1] , FPROC , p | |
276 | , o = roundup( o , A_STACK ) ); | |
277 | o += sizeof(char *); | |
278 | # endif PC | |
279 | dp -> nl_flags |= NMOD; | |
280 | break; | |
99878838 PK |
281 | } |
282 | if (dp != NIL) { | |
283 | cp->chain = dp; | |
284 | cp = dp; | |
285 | } | |
286 | } | |
287 | } | |
288 | cbn--; | |
289 | p = sp; | |
290 | # ifdef OBJ | |
291 | p->value[NL_OFFS] = -o+DPOFF2; | |
292 | /* | |
293 | * Correct the naivete (naievity) | |
294 | * of our above code to | |
295 | * calculate offsets | |
296 | */ | |
297 | for (il = p->chain; il != NIL; il = il->chain) | |
298 | il->value[NL_OFFS] += p->value[NL_OFFS]; | |
299 | # endif OBJ | |
300 | # ifdef PC | |
6fe6b9ee | 301 | p -> value[ NL_OFFS ] = roundup( o , A_STACK ); |
99878838 PK |
302 | # endif PC |
303 | } else { | |
304 | /* | |
305 | * The wonderful | |
306 | * program statement! | |
307 | */ | |
308 | # ifdef OBJ | |
309 | if (monflg) { | |
310 | put(1, O_PXPBUF); | |
311 | cntpatch = put(2, O_CASE4, 0); | |
312 | nfppatch = put(2, O_CASE4, 0); | |
313 | } | |
314 | # endif OBJ | |
315 | cp = p; | |
316 | for (rl = r[3]; rl; rl = rl[2]) { | |
317 | if (rl[1] == NIL) | |
318 | continue; | |
319 | dp = defnl(rl[1], VAR, 0, 0); | |
320 | cp->chain = dp; | |
321 | cp = dp; | |
322 | } | |
323 | } | |
324 | /* | |
325 | * Define a branch at | |
326 | * the "entry point" of | |
327 | * the prog/proc/func. | |
328 | */ | |
329 | p->entloc = getlab(); | |
330 | if (monflg) { | |
331 | bodycnts[ cbn ] = getcnt(); | |
332 | p->value[ NL_CNTR ] = 0; | |
333 | } | |
334 | # ifdef OBJ | |
335 | put(2, O_TRA4, p->entloc); | |
336 | # endif OBJ | |
337 | # ifdef PTREE | |
338 | { | |
339 | pPointer PF = tCopy( r ); | |
340 | ||
341 | pSeize( PorFHeader[ nesting ] ); | |
342 | if ( r[0] != T_PROG ) { | |
343 | pPointer *PFs; | |
344 | ||
345 | PFs = &( pDEF( PorFHeader[ nesting ] ).PorFPFs ); | |
346 | *PFs = ListAppend( *PFs , PF ); | |
347 | } else { | |
348 | pDEF( PorFHeader[ nesting ] ).GlobProg = PF; | |
349 | } | |
350 | pRelease( PorFHeader[ nesting ] ); | |
351 | } | |
352 | # endif PTREE | |
353 | return (p); | |
354 | } | |
355 | ||
356 | funcfwd(fp) | |
357 | struct nl *fp; | |
358 | { | |
359 | ||
360 | /* | |
361 | * save the counter for this function | |
362 | */ | |
363 | if ( monflg ) { | |
364 | fp -> value[ NL_CNTR ] = bodycnts[ cbn ]; | |
365 | } | |
366 | return (fp); | |
367 | } | |
368 | ||
369 | /* | |
370 | * Funcext marks the procedure or | |
371 | * function external in the symbol | |
372 | * table. Funcext should only be | |
373 | * called if PC, and is an error | |
374 | * otherwise. | |
375 | */ | |
376 | ||
377 | funcext(fp) | |
378 | struct nl *fp; | |
379 | { | |
380 | ||
381 | #ifdef PC | |
382 | if (opt('s')) { | |
383 | standard(); | |
384 | error("External procedures and functions are not standard"); | |
385 | } else { | |
386 | if (cbn == 1) { | |
387 | fp->ext_flags |= NEXTERN; | |
b721c131 | 388 | stabefunc( fp -> symbol , fp -> class , line ); |
99878838 PK |
389 | } |
390 | else | |
391 | error("External procedures and functions can only be declared at the outermost level."); | |
392 | } | |
393 | #endif PC | |
394 | #ifdef OBJ | |
395 | error("Procedures or functions cannot be declared external."); | |
396 | #endif OBJ | |
397 | ||
398 | return(fp); | |
399 | } | |
400 | ||
401 | /* | |
402 | * Funcbody is called | |
403 | * when the actual (resolved) | |
404 | * declaration of a procedure is | |
405 | * encountered. It puts the names | |
406 | * of the (function) and parameters | |
407 | * into the symbol table. | |
408 | */ | |
409 | funcbody(fp) | |
410 | struct nl *fp; | |
411 | { | |
412 | register struct nl *q, *p; | |
413 | ||
414 | cbn++; | |
415 | if (cbn >= DSPLYSZ) { | |
416 | error("Too many levels of function/procedure nesting"); | |
417 | pexit(ERRS); | |
418 | } | |
419 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
420 | gotos[cbn] = NIL; | |
421 | errcnt[cbn] = syneflg; | |
af97bcfa | 422 | parts[ cbn ] = NIL; |
99878838 PK |
423 | dfiles[ cbn ] = FALSE; |
424 | if (fp == NIL) | |
425 | return (NIL); | |
426 | /* | |
427 | * Save the virtual name | |
428 | * list stack pointer so | |
429 | * the space can be freed | |
430 | * later (funcend). | |
431 | */ | |
432 | fp->ptr[2] = nlp; | |
433 | # ifdef PC | |
434 | if ( fp -> class != PROG ) { | |
b721c131 | 435 | stabfunc( fp -> symbol , fp -> class , line , cbn - 1 ); |
99878838 | 436 | } else { |
b721c131 | 437 | stabfunc( "program" , fp -> class , line , 0 ); |
99878838 PK |
438 | } |
439 | # endif PC | |
440 | if (fp->class != PROG) { | |
441 | for (q = fp->chain; q != NIL; q = q->chain) { | |
442 | enter(q); | |
443 | # ifdef PC | |
444 | stabparam( q -> symbol , p2type( q -> type ) | |
445 | , q -> value[ NL_OFFS ] | |
446 | , lwidth( q -> type ) ); | |
447 | # endif PC | |
448 | } | |
449 | } | |
450 | if (fp->class == FUNC) { | |
451 | /* | |
452 | * For functions, enter the fvar | |
453 | */ | |
454 | enter(fp->ptr[NL_FVAR]); | |
455 | # ifdef PC | |
456 | q = fp -> ptr[ NL_FVAR ]; | |
457 | sizes[cbn].om_off -= lwidth( q -> type ); | |
458 | sizes[cbn].om_max = sizes[cbn].om_off; | |
b721c131 PK |
459 | stabvar( q -> symbol , p2type( q -> type ) , cbn |
460 | , q -> value[ NL_OFFS ] , lwidth( q -> type ) | |
461 | , line ); | |
99878838 PK |
462 | # endif PC |
463 | } | |
464 | # ifdef PTREE | |
465 | /* | |
466 | * pick up the pointer to porf declaration | |
467 | */ | |
468 | PorFHeader[ ++nesting ] = fp -> inTree; | |
469 | # endif PTREE | |
470 | return (fp); | |
471 | } | |
472 | ||
473 | struct nl *Fp; | |
474 | int pnumcnt; | |
475 | /* | |
476 | * Funcend is called to | |
477 | * finish a block by generating | |
478 | * the code for the statements. | |
479 | * It then looks for unresolved declarations | |
480 | * of labels, procedures and functions, | |
481 | * and cleans up the name list. | |
482 | * For the program, it checks the | |
483 | * semantics of the program | |
484 | * statement (yuchh). | |
485 | */ | |
486 | funcend(fp, bundle, endline) | |
487 | struct nl *fp; | |
488 | int *bundle; | |
489 | int endline; | |
490 | { | |
491 | register struct nl *p; | |
492 | register int i, b; | |
493 | int var, inp, out, chkref, *blk; | |
494 | struct nl *iop; | |
495 | char *cp; | |
496 | extern int cntstat; | |
497 | # ifdef PC | |
498 | int toplabel = getlab(); | |
499 | int botlabel = getlab(); | |
500 | # endif PC | |
501 | ||
502 | cntstat = 0; | |
503 | /* | |
504 | * yyoutline(); | |
505 | */ | |
506 | if (program != NIL) | |
507 | line = program->value[3]; | |
508 | blk = bundle[2]; | |
509 | if (fp == NIL) { | |
510 | cbn--; | |
511 | # ifdef PTREE | |
512 | nesting--; | |
513 | # endif PTREE | |
514 | return; | |
515 | } | |
516 | #ifdef OBJ | |
517 | /* | |
518 | * Patch the branch to the | |
519 | * entry point of the function | |
520 | */ | |
521 | patch4(fp->entloc); | |
522 | /* | |
523 | * Put out the block entrance code and the block name. | |
524 | * the CONG is overlaid by a patch later! | |
525 | */ | |
526 | var = put(2, (lenstr(fp->symbol,0) << 8) | |
527 | | (cbn == 1 && opt('p') == 0 ? O_NODUMP: O_BEG), 0); | |
c4e911b6 PK |
528 | /* |
529 | * output the number of bytes of arguments | |
530 | * this is only checked on formal calls. | |
531 | */ | |
532 | put(2, O_CASE4, cbn == 1 ? 0 : fp->value[NL_OFFS]-DPOFF2); | |
99878838 PK |
533 | put(2, O_CASE2, bundle[1]); |
534 | putstr(fp->symbol, 0); | |
535 | #endif OBJ | |
536 | #ifdef PC | |
537 | /* | |
538 | * put out the procedure entry code | |
539 | */ | |
540 | if ( fp -> class == PROG ) { | |
541 | putprintf( " .text" , 0 ); | |
542 | putprintf( " .align 1" , 0 ); | |
543 | putprintf( " .globl _main" , 0 ); | |
544 | putprintf( "_main:" , 0 ); | |
545 | putprintf( " .word 0" , 0 ); | |
546 | putprintf( " calls $0,_PCSTART" , 0 ); | |
547 | putprintf( " movl 4(ap),__argc" , 0 ); | |
548 | putprintf( " movl 8(ap),__argv" , 0 ); | |
549 | putprintf( " calls $0,_program" , 0 ); | |
550 | putprintf( " calls $0,_PCEXIT" , 0 ); | |
551 | ftnno = fp -> entloc; | |
552 | putprintf( " .text" , 0 ); | |
553 | putprintf( " .align 1" , 0 ); | |
554 | putprintf( " .globl _program" , 0 ); | |
555 | putprintf( "_program:" , 0 ); | |
556 | } else { | |
557 | ftnno = fp -> entloc; | |
558 | putprintf( " .text" , 0 ); | |
559 | putprintf( " .align 1" , 0 ); | |
560 | putprintf( " .globl " , 1 ); | |
561 | for ( i = 1 ; i < cbn ; i++ ) { | |
562 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
563 | } | |
564 | putprintf( "" , 0 ); | |
565 | for ( i = 1 ; i < cbn ; i++ ) { | |
566 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
567 | } | |
568 | putprintf( ":" , 0 ); | |
569 | } | |
570 | stablbrac( cbn ); | |
571 | /* | |
572 | * register save mask | |
573 | */ | |
574 | if ( opt( 't' ) ) { | |
575 | putprintf( " .word 0x%x" , 0 , RUNCHECK | RSAVEMASK ); | |
576 | } else { | |
577 | putprintf( " .word 0x%x" , 0 , RSAVEMASK ); | |
578 | } | |
579 | putjbr( botlabel ); | |
580 | putlab( toplabel ); | |
581 | if ( profflag ) { | |
582 | /* | |
583 | * call mcount for profiling | |
584 | */ | |
585 | putprintf( " moval 1f,r0" , 0 ); | |
586 | putprintf( " jsb mcount" , 0 ); | |
587 | putprintf( " .data" , 0 ); | |
588 | putprintf( " .align 2" , 0 ); | |
589 | putprintf( "1:" , 0 ); | |
590 | putprintf( " .long 0" , 0 ); | |
591 | putprintf( " .text" , 0 ); | |
592 | } | |
593 | /* | |
594 | * set up unwind exception vector. | |
595 | */ | |
596 | putprintf( " moval %s,%d(%s)" , 0 | |
597 | , UNWINDNAME , UNWINDOFFSET , P2FPNAME ); | |
598 | /* | |
599 | * save address of display entry, for unwind. | |
600 | */ | |
601 | putprintf( " moval %s+%d,%d(%s)" , 0 | |
602 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
603 | , DPTROFFSET , P2FPNAME ); | |
604 | /* | |
605 | * save old display | |
606 | */ | |
607 | putprintf( " movq %s+%d,%d(%s)" , 0 | |
608 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
609 | , DSAVEOFFSET , P2FPNAME ); | |
610 | /* | |
611 | * set up new display by saving AP and FP in appropriate | |
612 | * slot in display structure. | |
613 | */ | |
614 | putprintf( " movq %s,%s+%d" , 0 | |
615 | , P2APNAME , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
616 | /* | |
617 | * ask second pass to allocate known locals | |
618 | */ | |
619 | putlbracket( ftnno , -sizes[ cbn ].om_max ); | |
620 | /* | |
621 | * and zero them if checking is on | |
622 | * by calling zframe( bytes of locals , highest local address ); | |
623 | */ | |
c4e911b6 PK |
624 | if ( opt( 't' ) ) { |
625 | if ( ( -sizes[ cbn ].om_max ) > DPOFF1 ) { | |
626 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
627 | , "_ZFRAME" ); | |
628 | putleaf( P2ICON , ( -sizes[ cbn ].om_max ) - DPOFF1 | |
629 | , 0 , P2INT , 0 ); | |
630 | putLV( 0 , cbn , sizes[ cbn ].om_max , P2CHAR ); | |
631 | putop( P2LISTOP , P2INT ); | |
632 | putop( P2CALL , P2INT ); | |
633 | putdot( filename , line ); | |
634 | } | |
635 | /* | |
636 | * check number of longs of arguments | |
637 | * this can only be wrong for formal calls. | |
638 | */ | |
639 | if ( fp -> class != PROG ) { | |
640 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2PTR , P2FTN | P2INT ) , | |
641 | "_NARGCHK" ); | |
642 | putleaf( P2ICON , | |
643 | (fp->value[NL_OFFS] - DPOFF2) / sizeof(long) , | |
644 | 0 , P2INT , 0 ); | |
645 | putop( P2CALL , P2INT ); | |
646 | putdot( filename , line ); | |
647 | } | |
99878838 PK |
648 | } |
649 | #endif PC | |
650 | if ( monflg ) { | |
651 | if ( fp -> value[ NL_CNTR ] != 0 ) { | |
652 | inccnt( fp -> value [ NL_CNTR ] ); | |
653 | } | |
654 | inccnt( bodycnts[ fp -> nl_block & 037 ] ); | |
655 | } | |
656 | if (fp->class == PROG) { | |
657 | /* | |
658 | * The glorious buffers option. | |
659 | * 0 = don't buffer output | |
660 | * 1 = line buffer output | |
661 | * 2 = 512 byte buffer output | |
662 | */ | |
663 | # ifdef OBJ | |
664 | if (opt('b') != 1) | |
665 | put(1, O_BUFF | opt('b') << 8); | |
666 | # endif OBJ | |
667 | # ifdef PC | |
668 | if ( opt( 'b' ) != 1 ) { | |
669 | putleaf( P2ICON , 0 , 0 | |
670 | , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_BUFF" ); | |
671 | putleaf( P2ICON , opt( 'b' ) , 0 , P2INT , 0 ); | |
672 | putop( P2CALL , P2INT ); | |
673 | putdot( filename , line ); | |
674 | } | |
675 | # endif PC | |
676 | out = 0; | |
677 | for (p = fp->chain; p != NIL; p = p->chain) { | |
678 | if (strcmp(p->symbol, "input") == 0) { | |
679 | inp++; | |
680 | continue; | |
681 | } | |
682 | if (strcmp(p->symbol, "output") == 0) { | |
683 | out++; | |
684 | continue; | |
685 | } | |
686 | iop = lookup1(p->symbol); | |
687 | if (iop == NIL || bn != cbn) { | |
688 | error("File %s listed in program statement but not declared", p->symbol); | |
689 | continue; | |
690 | } | |
691 | if (iop->class != VAR) { | |
692 | error("File %s listed in program statement but declared as a %s", p->symbol, classes[iop->class]); | |
693 | continue; | |
694 | } | |
695 | if (iop->type == NIL) | |
696 | continue; | |
697 | if (iop->type->class != FILET) { | |
698 | error("File %s listed in program statement but defined as %s", | |
699 | p->symbol, nameof(iop->type)); | |
700 | continue; | |
701 | } | |
702 | # ifdef OBJ | |
703 | put(2, O_LV | bn << 8+INDX, iop->value[NL_OFFS]); | |
704 | i = lenstr(p->symbol,0); | |
705 | put(2, O_LVCON, i); | |
706 | putstr(p->symbol, 0); | |
707 | do { | |
708 | i--; | |
709 | } while (p->symbol+i == 0); | |
710 | put(2, O_CON24, i+1); | |
711 | put(2, O_CON24, text(iop->type) ? 0 : width(iop->type->type)); | |
712 | put(1, O_DEFNAME); | |
713 | # endif OBJ | |
714 | # ifdef PC | |
715 | putleaf( P2ICON , 0 , 0 | |
716 | , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
717 | , "_DEFNAME" ); | |
718 | putLV( p -> symbol , bn , iop -> value[NL_OFFS] | |
719 | , p2type( iop ) ); | |
720 | putCONG( p -> symbol , strlen( p -> symbol ) | |
721 | , LREQ ); | |
722 | putop( P2LISTOP , P2INT ); | |
723 | putleaf( P2ICON , strlen( p -> symbol ) | |
724 | , 0 , P2INT , 0 ); | |
725 | putop( P2LISTOP , P2INT ); | |
726 | putleaf( P2ICON | |
727 | , text(iop->type) ? 0 : width(iop->type->type) | |
728 | , 0 , P2INT , 0 ); | |
729 | putop( P2LISTOP , P2INT ); | |
730 | putop( P2CALL , P2INT ); | |
731 | putdot( filename , line ); | |
732 | # endif PC | |
733 | } | |
734 | if (out == 0 && fp->chain != NIL) { | |
735 | recovered(); | |
736 | error("The file output must appear in the program statement file list"); | |
737 | } | |
738 | } | |
739 | /* | |
740 | * Process the prog/proc/func body | |
741 | */ | |
742 | noreach = 0; | |
743 | line = bundle[1]; | |
744 | statlist(blk); | |
745 | # ifdef PTREE | |
746 | { | |
747 | pPointer Body = tCopy( blk ); | |
748 | ||
749 | pDEF( PorFHeader[ nesting -- ] ).PorFBody = Body; | |
750 | } | |
751 | # endif PTREE | |
752 | # ifdef OBJ | |
753 | if (cbn== 1 && monflg != 0) { | |
754 | patchfil(cntpatch - 2, cnts, 2); | |
755 | patchfil(nfppatch - 2, pfcnt, 2); | |
756 | } | |
757 | # endif OBJ | |
758 | # ifdef PC | |
759 | if ( fp -> class == PROG && monflg ) { | |
760 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
761 | , "_PMFLUSH" ); | |
762 | putleaf( P2ICON , cnts , 0 , P2INT , 0 ); | |
763 | putleaf( P2ICON , pfcnt , 0 , P2INT , 0 ); | |
764 | putop( P2LISTOP , P2INT ); | |
765 | putop( P2CALL , P2INT ); | |
766 | putdot( filename , line ); | |
767 | } | |
768 | # endif PC | |
769 | if (fp->class == PROG && inp == 0 && (input->nl_flags & (NUSED|NMOD)) != 0) { | |
770 | recovered(); | |
771 | error("Input is used but not defined in the program statement"); | |
772 | } | |
773 | /* | |
774 | * Clean up the symbol table displays and check for unresolves | |
775 | */ | |
776 | line = endline; | |
777 | b = cbn; | |
778 | Fp = fp; | |
779 | chkref = syneflg == errcnt[cbn] && opt('w') == 0; | |
780 | for (i = 0; i <= 077; i++) { | |
781 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
782 | /* | |
783 | * Check for variables defined | |
784 | * but not referenced | |
785 | */ | |
786 | if (chkref && p->symbol != NIL) | |
787 | switch (p->class) { | |
788 | case FIELD: | |
789 | /* | |
790 | * If the corresponding record is | |
791 | * unused, we shouldn't complain about | |
792 | * the fields. | |
793 | */ | |
794 | default: | |
795 | if ((p->nl_flags & (NUSED|NMOD)) == 0) { | |
796 | warning(); | |
797 | nerror("%s %s is neither used nor set", classes[p->class], p->symbol); | |
798 | break; | |
799 | } | |
800 | /* | |
801 | * If a var parameter is either | |
802 | * modified or used that is enough. | |
803 | */ | |
804 | if (p->class == REF) | |
805 | continue; | |
806 | # ifdef OBJ | |
807 | if ((p->nl_flags & NUSED) == 0) { | |
808 | warning(); | |
809 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
810 | break; | |
811 | } | |
812 | # endif OBJ | |
813 | # ifdef PC | |
814 | if (((p->nl_flags & NUSED) == 0) && ((p->ext_flags & NEXTERN) == 0)) { | |
815 | warning(); | |
816 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
817 | break; | |
818 | } | |
819 | # endif PC | |
820 | if ((p->nl_flags & NMOD) == 0) { | |
821 | warning(); | |
822 | nerror("%s %s is used but never set", classes[p->class], p->symbol); | |
823 | break; | |
824 | } | |
825 | case LABEL: | |
826 | case FVAR: | |
827 | case BADUSE: | |
828 | break; | |
829 | } | |
830 | switch (p->class) { | |
831 | case BADUSE: | |
832 | cp = "s"; | |
833 | if (p->chain->ud_next == NIL) | |
834 | cp++; | |
835 | eholdnl(); | |
836 | if (p->value[NL_KINDS] & ISUNDEF) | |
837 | nerror("%s undefined on line%s", p->symbol, cp); | |
838 | else | |
839 | nerror("%s improperly used on line%s", p->symbol, cp); | |
840 | pnumcnt = 10; | |
841 | pnums(p->chain); | |
842 | pchr('\n'); | |
843 | break; | |
844 | ||
845 | case FUNC: | |
846 | case PROC: | |
847 | # ifdef OBJ | |
848 | if ((p->nl_flags & NFORWD)) | |
849 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
850 | # endif OBJ | |
851 | # ifdef PC | |
852 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
853 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
854 | # endif PC | |
855 | break; | |
856 | ||
857 | case LABEL: | |
858 | if (p->nl_flags & NFORWD) | |
859 | nerror("label %s was declared but not defined", p->symbol); | |
860 | break; | |
861 | case FVAR: | |
862 | if ((p->nl_flags & NMOD) == 0) | |
863 | nerror("No assignment to the function variable"); | |
864 | break; | |
865 | } | |
866 | } | |
867 | /* | |
868 | * Pop this symbol | |
869 | * table slot | |
870 | */ | |
871 | disptab[i] = p; | |
872 | } | |
873 | ||
874 | # ifdef OBJ | |
875 | put(1, O_END); | |
876 | # endif OBJ | |
877 | # ifdef PC | |
878 | /* | |
879 | * if there were file variables declared at this level | |
880 | * call pclose( &__disply[ cbn ] ) to clean them up. | |
881 | */ | |
882 | if ( dfiles[ cbn ] ) { | |
883 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
884 | , "_PCLOSE" ); | |
885 | putRV( DISPLAYNAME , 0 , cbn * sizeof( struct dispsave ) | |
886 | , P2PTR | P2CHAR ); | |
887 | putop( P2CALL , P2INT ); | |
888 | putdot( filename , line ); | |
889 | } | |
890 | /* | |
891 | * if this is a function, | |
892 | * the function variable is the return value. | |
893 | * if it's a scalar valued function, return scalar, | |
894 | * else, return a pointer to the structure value. | |
895 | */ | |
896 | if ( fp -> class == FUNC ) { | |
897 | struct nl *fvar = fp -> ptr[ NL_FVAR ]; | |
898 | long fvartype = p2type( fvar -> type ); | |
c4e911b6 PK |
899 | long label; |
900 | char labelname[ BUFSIZ ]; | |
99878838 PK |
901 | |
902 | switch ( classify( fvar -> type ) ) { | |
903 | case TBOOL: | |
904 | case TCHAR: | |
905 | case TINT: | |
906 | case TSCAL: | |
907 | case TDOUBLE: | |
908 | case TPTR: | |
909 | putRV( fvar -> symbol , ( fvar -> nl_block ) & 037 | |
910 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
911 | break; | |
912 | default: | |
c4e911b6 PK |
913 | label = getlab(); |
914 | sprintf( labelname , PREFIXFORMAT , | |
915 | LABELPREFIX , label ); | |
916 | putprintf( " .data" , 0 ); | |
917 | putprintf( " .lcomm %s,%d" , 0 , | |
918 | labelname , lwidth( fvar -> type ) ); | |
919 | putprintf( " .text" , 0 ); | |
55841528 | 920 | putleaf( P2NAME , 0 , 0 , fvartype , labelname ); |
99878838 PK |
921 | putLV( fvar -> symbol , ( fvar -> nl_block ) & 037 |
922 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
c4e911b6 PK |
923 | putstrop( P2STASG , fvartype , lwidth( fvar -> type ) , |
924 | align( fvar -> type ) ); | |
55841528 PK |
925 | putdot( filename , line ); |
926 | putleaf( P2ICON , 0 , 0 , fvartype , labelname ); | |
99878838 PK |
927 | break; |
928 | } | |
929 | putop( P2FORCE , fvartype ); | |
930 | putdot( filename , line ); | |
931 | } | |
932 | /* | |
933 | * restore old display entry from save area | |
934 | */ | |
935 | ||
936 | putprintf( " movq %d(%s),%s+%d" , 0 | |
937 | , DSAVEOFFSET , P2FPNAME | |
938 | , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
939 | stabrbrac( cbn ); | |
940 | putprintf( " ret" , 0 ); | |
941 | /* | |
942 | * let the second pass allocate locals | |
943 | */ | |
944 | putlab( botlabel ); | |
945 | putprintf( " subl2 $LF%d,sp" , 0 , ftnno ); | |
946 | putrbracket( ftnno ); | |
947 | putjbr( toplabel ); | |
948 | /* | |
949 | * declare pcp counters, if any | |
950 | */ | |
951 | if ( monflg && fp -> class == PROG ) { | |
952 | putprintf( " .data" , 0 ); | |
953 | putprintf( " .comm " , 1 ); | |
954 | putprintf( PCPCOUNT , 1 ); | |
955 | putprintf( ",%d" , 0 , ( cnts + 1 ) * sizeof (long) ); | |
956 | putprintf( " .text" , 0 ); | |
957 | } | |
958 | # endif PC | |
959 | #ifdef DEBUG | |
960 | dumpnl(fp->ptr[2], fp->symbol); | |
961 | #endif | |
962 | /* | |
963 | * Restore the | |
964 | * (virtual) name list | |
965 | * position | |
966 | */ | |
967 | nlfree(fp->ptr[2]); | |
968 | /* | |
969 | * Proc/func has been | |
970 | * resolved | |
971 | */ | |
972 | fp->nl_flags &= ~NFORWD; | |
973 | /* | |
974 | * Patch the beg | |
975 | * of the proc/func to | |
976 | * the proper variable size | |
977 | */ | |
978 | if (Fp == NIL) | |
979 | elineon(); | |
980 | # ifdef OBJ | |
981 | patchfil(var, sizes[cbn].om_max, 2); | |
982 | # endif OBJ | |
983 | cbn--; | |
984 | if (inpflist(fp->symbol)) { | |
985 | opop('l'); | |
986 | } | |
987 | } | |
988 | ||
989 | ||
990 | /* | |
991 | * Segend is called to check for | |
992 | * unresolved variables, funcs and | |
993 | * procs, and deliver unresolved and | |
994 | * baduse error diagnostics at the | |
995 | * end of a routine segment (a separately | |
996 | * compiled segment that is not the | |
997 | * main program) for PC. This | |
998 | * routine should only be called | |
999 | * by PC (not standard). | |
1000 | */ | |
1001 | segend() | |
1002 | { | |
1003 | register struct nl *p; | |
1004 | register int i,b; | |
1005 | char *cp; | |
1006 | ||
1007 | #ifdef PC | |
1008 | if (opt('s')) { | |
1009 | standard(); | |
1010 | error("Separately compiled routine segments are not standard."); | |
1011 | } else { | |
1012 | b = cbn; | |
1013 | for (i=0; i<077; i++) { | |
1014 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
1015 | switch (p->class) { | |
1016 | case BADUSE: | |
1017 | cp = 's'; | |
1018 | if (p->chain->ud_next == NIL) | |
1019 | cp++; | |
1020 | eholdnl(); | |
1021 | if (p->value[NL_KINDS] & ISUNDEF) | |
1022 | nerror("%s undefined on line%s", p->symbol, cp); | |
1023 | else | |
1024 | nerror("%s improperly used on line%s", p->symbol, cp); | |
1025 | pnumcnt = 10; | |
1026 | pnums(p->chain); | |
1027 | pchr('\n'); | |
1028 | break; | |
1029 | ||
1030 | case FUNC: | |
1031 | case PROC: | |
1032 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
1033 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
1034 | break; | |
1035 | ||
1036 | case FVAR: | |
1037 | if (((p->nl_flags & NMOD) == 0) && ((p->chain->ext_flags & NEXTERN) == 0)) | |
1038 | nerror("No assignment to the function variable"); | |
1039 | break; | |
1040 | } | |
1041 | } | |
1042 | disptab[i] = p; | |
1043 | } | |
1044 | } | |
1045 | #endif PC | |
1046 | #ifdef OBJ | |
1047 | error("Missing program statement and program body"); | |
1048 | #endif OBJ | |
1049 | ||
1050 | } | |
1051 | ||
1052 | ||
1053 | /* | |
1054 | * Level1 does level one processing for | |
1055 | * separately compiled routine segments | |
1056 | */ | |
1057 | level1() | |
1058 | { | |
1059 | ||
1060 | # ifdef OBJ | |
1061 | error("Missing program statement"); | |
1062 | # endif OBJ | |
1063 | # ifdef PC | |
1064 | if (opt('s')) { | |
1065 | standard(); | |
1066 | error("Missing program statement"); | |
1067 | } | |
1068 | # endif PC | |
1069 | ||
1070 | cbn++; | |
1071 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
af97bcfa PK |
1072 | gotos[cbn] = NIL; |
1073 | errcnt[cbn] = syneflg; | |
1074 | parts[ cbn ] = NIL; | |
1075 | dfiles[ cbn ] = FALSE; | |
99878838 PK |
1076 | progseen++; |
1077 | } | |
1078 | ||
1079 | ||
1080 | ||
1081 | pnums(p) | |
1082 | struct udinfo *p; | |
1083 | { | |
1084 | ||
1085 | if (p->ud_next != NIL) | |
1086 | pnums(p->ud_next); | |
1087 | if (pnumcnt == 0) { | |
1088 | printf("\n\t"); | |
1089 | pnumcnt = 20; | |
1090 | } | |
1091 | pnumcnt--; | |
1092 | printf(" %d", p->ud_line); | |
1093 | } | |
1094 | ||
1095 | nerror(a1, a2, a3) | |
1096 | { | |
1097 | ||
1098 | if (Fp != NIL) { | |
1099 | yySsync(); | |
1100 | #ifndef PI1 | |
1101 | if (opt('l')) | |
1102 | yyoutline(); | |
1103 | #endif | |
1104 | yysetfile(filename); | |
1105 | printf("In %s %s:\n", classes[Fp->class], Fp->symbol); | |
1106 | Fp = NIL; | |
1107 | elineoff(); | |
1108 | } | |
1109 | error(a1, a2, a3); | |
1110 | } |