Commit | Line | Data |
---|---|---|
99878838 PK |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | ||
6fe6b9ee | 3 | static char sccsid[] = "@(#)fdec.c 1.6 %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++; | |
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: | |
c4e911b6 | 141 | if (opt('s')) { |
99878838 | 142 | standard(); |
c4e911b6 PK |
143 | error("Functions should not return %ss", clnames[o]); |
144 | } | |
99878838 PK |
145 | } |
146 | # ifdef PC | |
147 | enclosing[ cbn ] = r[2]; | |
148 | # endif PC | |
149 | break; | |
150 | default: | |
151 | panic("funchdr"); | |
152 | } | |
153 | if (r[0] != T_PROG) { | |
154 | /* | |
155 | * Mark this proc/func as | |
156 | * being forward declared | |
157 | */ | |
158 | p->nl_flags |= NFORWD; | |
159 | /* | |
160 | * Enter the parameters | |
161 | * in the next block for | |
162 | * the time being | |
163 | */ | |
164 | if (++cbn >= DSPLYSZ) { | |
165 | error("Procedure/function nesting too deep"); | |
166 | pexit(ERRS); | |
167 | } | |
168 | /* | |
169 | * For functions, the function variable | |
170 | */ | |
171 | if (p->class == FUNC) { | |
172 | # ifdef OBJ | |
173 | cp = defnl(r[2], FVAR, p->type, 0); | |
174 | # endif OBJ | |
175 | # ifdef PC | |
176 | /* | |
177 | * fvars used to be allocated and deallocated | |
178 | * by the caller right before the arguments. | |
179 | * the offset of the fvar was kept in | |
180 | * value[NL_OFFS] of function (very wierd, | |
181 | * but see asgnop). | |
182 | * now, they are locals to the function | |
183 | * with the offset kept in the fvar. | |
184 | */ | |
185 | ||
186 | cp = defnl( r[2] , FVAR , p -> type | |
187 | , -( roundup( DPOFF1+width( p -> type ) | |
188 | , align( p -> type ) ) ) ); | |
189 | # endif PC | |
190 | cp->chain = p; | |
191 | p->ptr[NL_FVAR] = cp; | |
192 | } | |
193 | /* | |
194 | * Enter the parameters | |
195 | * and compute total size | |
196 | */ | |
197 | cp = sp = p; | |
198 | ||
199 | # ifdef OBJ | |
200 | o = 0; | |
201 | # endif OBJ | |
202 | # ifdef PC | |
203 | /* | |
204 | * parameters used to be allocated backwards, | |
205 | * then fixed. for pc, they are allocated correctly. | |
206 | * also, they are aligned. | |
207 | */ | |
208 | o = DPOFF2; | |
209 | # endif PC | |
210 | for (rl = r[3]; rl != NIL; rl = rl[2]) { | |
211 | p = NIL; | |
212 | if (rl[1] == NIL) | |
213 | continue; | |
214 | /* | |
215 | * Parametric procedures | |
216 | * don't have types !?! | |
217 | */ | |
218 | if (rl[1][0] != T_PPROC) { | |
219 | rll = rl[1][2]; | |
220 | if (rll[0] != T_TYID) { | |
221 | error("Types for arguments can be specified only by using type identifiers"); | |
222 | p = NIL; | |
223 | } else | |
224 | p = gtype(rll); | |
225 | } | |
226 | for (il = rl[1][1]; il != NIL; il = il[2]) { | |
227 | switch (rl[1][0]) { | |
228 | default: | |
229 | panic("funchdr2"); | |
230 | case T_PVAL: | |
231 | if (p != NIL) { | |
232 | if (p->class == FILET) | |
233 | error("Files cannot be passed by value"); | |
234 | else if (p->nl_flags & NFILES) | |
235 | error("Files cannot be a component of %ss passed by value", | |
236 | nameof(p)); | |
237 | } | |
238 | # ifdef OBJ | |
239 | dp = defnl(il[1], VAR, p, o -= even(width(p))); | |
240 | # endif OBJ | |
241 | # ifdef PC | |
242 | dp = defnl( il[1] , VAR , p | |
243 | , o = roundup( o , A_STACK ) ); | |
244 | o += width( p ); | |
245 | # endif PC | |
246 | dp->nl_flags |= NMOD; | |
247 | break; | |
248 | case T_PVAR: | |
249 | # ifdef OBJ | |
250 | dp = defnl(il[1], REF, p, o -= sizeof ( int * ) ); | |
251 | # endif OBJ | |
252 | # ifdef PC | |
253 | dp = defnl( il[1] , REF , p | |
254 | , o = roundup( o , A_STACK ) ); | |
255 | o += sizeof(char *); | |
256 | # endif PC | |
257 | break; | |
258 | case T_PFUNC: | |
c4e911b6 PK |
259 | # ifdef OBJ |
260 | dp = defnl(il[1], FFUNC, p, o -= sizeof ( int * ) ); | |
261 | # endif OBJ | |
262 | # ifdef PC | |
263 | dp = defnl( il[1] , FFUNC , p | |
264 | , o = roundup( o , A_STACK ) ); | |
265 | o += sizeof(char *); | |
266 | # endif PC | |
267 | dp -> nl_flags |= NMOD; | |
268 | break; | |
99878838 | 269 | case T_PPROC: |
c4e911b6 PK |
270 | # ifdef OBJ |
271 | dp = defnl(il[1], FPROC, p, o -= sizeof ( int * ) ); | |
272 | # endif OBJ | |
273 | # ifdef PC | |
274 | dp = defnl( il[1] , FPROC , p | |
275 | , o = roundup( o , A_STACK ) ); | |
276 | o += sizeof(char *); | |
277 | # endif PC | |
278 | dp -> nl_flags |= NMOD; | |
279 | break; | |
99878838 PK |
280 | } |
281 | if (dp != NIL) { | |
282 | cp->chain = dp; | |
283 | cp = dp; | |
284 | } | |
285 | } | |
286 | } | |
287 | cbn--; | |
288 | p = sp; | |
289 | # ifdef OBJ | |
290 | p->value[NL_OFFS] = -o+DPOFF2; | |
291 | /* | |
292 | * Correct the naivete (naievity) | |
293 | * of our above code to | |
294 | * calculate offsets | |
295 | */ | |
296 | for (il = p->chain; il != NIL; il = il->chain) | |
297 | il->value[NL_OFFS] += p->value[NL_OFFS]; | |
298 | # endif OBJ | |
299 | # ifdef PC | |
6fe6b9ee | 300 | p -> value[ NL_OFFS ] = roundup( o , A_STACK ); |
99878838 PK |
301 | # endif PC |
302 | } else { | |
303 | /* | |
304 | * The wonderful | |
305 | * program statement! | |
306 | */ | |
307 | # ifdef OBJ | |
308 | if (monflg) { | |
309 | put(1, O_PXPBUF); | |
310 | cntpatch = put(2, O_CASE4, 0); | |
311 | nfppatch = put(2, O_CASE4, 0); | |
312 | } | |
313 | # endif OBJ | |
314 | cp = p; | |
315 | for (rl = r[3]; rl; rl = rl[2]) { | |
316 | if (rl[1] == NIL) | |
317 | continue; | |
318 | dp = defnl(rl[1], VAR, 0, 0); | |
319 | cp->chain = dp; | |
320 | cp = dp; | |
321 | } | |
322 | } | |
323 | /* | |
324 | * Define a branch at | |
325 | * the "entry point" of | |
326 | * the prog/proc/func. | |
327 | */ | |
328 | p->entloc = getlab(); | |
329 | if (monflg) { | |
330 | bodycnts[ cbn ] = getcnt(); | |
331 | p->value[ NL_CNTR ] = 0; | |
332 | } | |
333 | # ifdef OBJ | |
334 | put(2, O_TRA4, p->entloc); | |
335 | # endif OBJ | |
336 | # ifdef PTREE | |
337 | { | |
338 | pPointer PF = tCopy( r ); | |
339 | ||
340 | pSeize( PorFHeader[ nesting ] ); | |
341 | if ( r[0] != T_PROG ) { | |
342 | pPointer *PFs; | |
343 | ||
344 | PFs = &( pDEF( PorFHeader[ nesting ] ).PorFPFs ); | |
345 | *PFs = ListAppend( *PFs , PF ); | |
346 | } else { | |
347 | pDEF( PorFHeader[ nesting ] ).GlobProg = PF; | |
348 | } | |
349 | pRelease( PorFHeader[ nesting ] ); | |
350 | } | |
351 | # endif PTREE | |
352 | return (p); | |
353 | } | |
354 | ||
355 | funcfwd(fp) | |
356 | struct nl *fp; | |
357 | { | |
358 | ||
359 | /* | |
360 | * save the counter for this function | |
361 | */ | |
362 | if ( monflg ) { | |
363 | fp -> value[ NL_CNTR ] = bodycnts[ cbn ]; | |
364 | } | |
365 | return (fp); | |
366 | } | |
367 | ||
368 | /* | |
369 | * Funcext marks the procedure or | |
370 | * function external in the symbol | |
371 | * table. Funcext should only be | |
372 | * called if PC, and is an error | |
373 | * otherwise. | |
374 | */ | |
375 | ||
376 | funcext(fp) | |
377 | struct nl *fp; | |
378 | { | |
379 | ||
380 | #ifdef PC | |
381 | if (opt('s')) { | |
382 | standard(); | |
383 | error("External procedures and functions are not standard"); | |
384 | } else { | |
385 | if (cbn == 1) { | |
386 | fp->ext_flags |= NEXTERN; | |
b721c131 | 387 | stabefunc( fp -> symbol , fp -> class , line ); |
99878838 PK |
388 | } |
389 | else | |
390 | error("External procedures and functions can only be declared at the outermost level."); | |
391 | } | |
392 | #endif PC | |
393 | #ifdef OBJ | |
394 | error("Procedures or functions cannot be declared external."); | |
395 | #endif OBJ | |
396 | ||
397 | return(fp); | |
398 | } | |
399 | ||
400 | /* | |
401 | * Funcbody is called | |
402 | * when the actual (resolved) | |
403 | * declaration of a procedure is | |
404 | * encountered. It puts the names | |
405 | * of the (function) and parameters | |
406 | * into the symbol table. | |
407 | */ | |
408 | funcbody(fp) | |
409 | struct nl *fp; | |
410 | { | |
411 | register struct nl *q, *p; | |
412 | ||
413 | cbn++; | |
414 | if (cbn >= DSPLYSZ) { | |
415 | error("Too many levels of function/procedure nesting"); | |
416 | pexit(ERRS); | |
417 | } | |
418 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
419 | gotos[cbn] = NIL; | |
420 | errcnt[cbn] = syneflg; | |
af97bcfa | 421 | parts[ cbn ] = NIL; |
99878838 PK |
422 | dfiles[ cbn ] = FALSE; |
423 | if (fp == NIL) | |
424 | return (NIL); | |
425 | /* | |
426 | * Save the virtual name | |
427 | * list stack pointer so | |
428 | * the space can be freed | |
429 | * later (funcend). | |
430 | */ | |
431 | fp->ptr[2] = nlp; | |
432 | # ifdef PC | |
433 | if ( fp -> class != PROG ) { | |
b721c131 | 434 | stabfunc( fp -> symbol , fp -> class , line , cbn - 1 ); |
99878838 | 435 | } else { |
b721c131 | 436 | stabfunc( "program" , fp -> class , line , 0 ); |
99878838 PK |
437 | } |
438 | # endif PC | |
439 | if (fp->class != PROG) { | |
440 | for (q = fp->chain; q != NIL; q = q->chain) { | |
441 | enter(q); | |
442 | # ifdef PC | |
443 | stabparam( q -> symbol , p2type( q -> type ) | |
444 | , q -> value[ NL_OFFS ] | |
445 | , lwidth( q -> type ) ); | |
446 | # endif PC | |
447 | } | |
448 | } | |
449 | if (fp->class == FUNC) { | |
450 | /* | |
451 | * For functions, enter the fvar | |
452 | */ | |
453 | enter(fp->ptr[NL_FVAR]); | |
454 | # ifdef PC | |
455 | q = fp -> ptr[ NL_FVAR ]; | |
456 | sizes[cbn].om_off -= lwidth( q -> type ); | |
457 | sizes[cbn].om_max = sizes[cbn].om_off; | |
b721c131 PK |
458 | stabvar( q -> symbol , p2type( q -> type ) , cbn |
459 | , q -> value[ NL_OFFS ] , lwidth( q -> type ) | |
460 | , line ); | |
99878838 PK |
461 | # endif PC |
462 | } | |
463 | # ifdef PTREE | |
464 | /* | |
465 | * pick up the pointer to porf declaration | |
466 | */ | |
467 | PorFHeader[ ++nesting ] = fp -> inTree; | |
468 | # endif PTREE | |
469 | return (fp); | |
470 | } | |
471 | ||
472 | struct nl *Fp; | |
473 | int pnumcnt; | |
474 | /* | |
475 | * Funcend is called to | |
476 | * finish a block by generating | |
477 | * the code for the statements. | |
478 | * It then looks for unresolved declarations | |
479 | * of labels, procedures and functions, | |
480 | * and cleans up the name list. | |
481 | * For the program, it checks the | |
482 | * semantics of the program | |
483 | * statement (yuchh). | |
484 | */ | |
485 | funcend(fp, bundle, endline) | |
486 | struct nl *fp; | |
487 | int *bundle; | |
488 | int endline; | |
489 | { | |
490 | register struct nl *p; | |
491 | register int i, b; | |
492 | int var, inp, out, chkref, *blk; | |
493 | struct nl *iop; | |
494 | char *cp; | |
495 | extern int cntstat; | |
496 | # ifdef PC | |
497 | int toplabel = getlab(); | |
498 | int botlabel = getlab(); | |
499 | # endif PC | |
500 | ||
501 | cntstat = 0; | |
502 | /* | |
503 | * yyoutline(); | |
504 | */ | |
505 | if (program != NIL) | |
506 | line = program->value[3]; | |
507 | blk = bundle[2]; | |
508 | if (fp == NIL) { | |
509 | cbn--; | |
510 | # ifdef PTREE | |
511 | nesting--; | |
512 | # endif PTREE | |
513 | return; | |
514 | } | |
515 | #ifdef OBJ | |
516 | /* | |
517 | * Patch the branch to the | |
518 | * entry point of the function | |
519 | */ | |
520 | patch4(fp->entloc); | |
521 | /* | |
522 | * Put out the block entrance code and the block name. | |
523 | * the CONG is overlaid by a patch later! | |
524 | */ | |
525 | var = put(2, (lenstr(fp->symbol,0) << 8) | |
526 | | (cbn == 1 && opt('p') == 0 ? O_NODUMP: O_BEG), 0); | |
c4e911b6 PK |
527 | /* |
528 | * output the number of bytes of arguments | |
529 | * this is only checked on formal calls. | |
530 | */ | |
531 | put(2, O_CASE4, cbn == 1 ? 0 : fp->value[NL_OFFS]-DPOFF2); | |
99878838 PK |
532 | put(2, O_CASE2, bundle[1]); |
533 | putstr(fp->symbol, 0); | |
534 | #endif OBJ | |
535 | #ifdef PC | |
536 | /* | |
537 | * put out the procedure entry code | |
538 | */ | |
539 | if ( fp -> class == PROG ) { | |
540 | putprintf( " .text" , 0 ); | |
541 | putprintf( " .align 1" , 0 ); | |
542 | putprintf( " .globl _main" , 0 ); | |
543 | putprintf( "_main:" , 0 ); | |
544 | putprintf( " .word 0" , 0 ); | |
545 | putprintf( " calls $0,_PCSTART" , 0 ); | |
546 | putprintf( " movl 4(ap),__argc" , 0 ); | |
547 | putprintf( " movl 8(ap),__argv" , 0 ); | |
548 | putprintf( " calls $0,_program" , 0 ); | |
549 | putprintf( " calls $0,_PCEXIT" , 0 ); | |
550 | ftnno = fp -> entloc; | |
551 | putprintf( " .text" , 0 ); | |
552 | putprintf( " .align 1" , 0 ); | |
553 | putprintf( " .globl _program" , 0 ); | |
554 | putprintf( "_program:" , 0 ); | |
555 | } else { | |
556 | ftnno = fp -> entloc; | |
557 | putprintf( " .text" , 0 ); | |
558 | putprintf( " .align 1" , 0 ); | |
559 | putprintf( " .globl " , 1 ); | |
560 | for ( i = 1 ; i < cbn ; i++ ) { | |
561 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
562 | } | |
563 | putprintf( "" , 0 ); | |
564 | for ( i = 1 ; i < cbn ; i++ ) { | |
565 | putprintf( EXTFORMAT , 1 , enclosing[ i ] ); | |
566 | } | |
567 | putprintf( ":" , 0 ); | |
568 | } | |
569 | stablbrac( cbn ); | |
570 | /* | |
571 | * register save mask | |
572 | */ | |
573 | if ( opt( 't' ) ) { | |
574 | putprintf( " .word 0x%x" , 0 , RUNCHECK | RSAVEMASK ); | |
575 | } else { | |
576 | putprintf( " .word 0x%x" , 0 , RSAVEMASK ); | |
577 | } | |
578 | putjbr( botlabel ); | |
579 | putlab( toplabel ); | |
580 | if ( profflag ) { | |
581 | /* | |
582 | * call mcount for profiling | |
583 | */ | |
584 | putprintf( " moval 1f,r0" , 0 ); | |
585 | putprintf( " jsb mcount" , 0 ); | |
586 | putprintf( " .data" , 0 ); | |
587 | putprintf( " .align 2" , 0 ); | |
588 | putprintf( "1:" , 0 ); | |
589 | putprintf( " .long 0" , 0 ); | |
590 | putprintf( " .text" , 0 ); | |
591 | } | |
592 | /* | |
593 | * set up unwind exception vector. | |
594 | */ | |
595 | putprintf( " moval %s,%d(%s)" , 0 | |
596 | , UNWINDNAME , UNWINDOFFSET , P2FPNAME ); | |
597 | /* | |
598 | * save address of display entry, for unwind. | |
599 | */ | |
600 | putprintf( " moval %s+%d,%d(%s)" , 0 | |
601 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
602 | , DPTROFFSET , P2FPNAME ); | |
603 | /* | |
604 | * save old display | |
605 | */ | |
606 | putprintf( " movq %s+%d,%d(%s)" , 0 | |
607 | , DISPLAYNAME , cbn * sizeof(struct dispsave) | |
608 | , DSAVEOFFSET , P2FPNAME ); | |
609 | /* | |
610 | * set up new display by saving AP and FP in appropriate | |
611 | * slot in display structure. | |
612 | */ | |
613 | putprintf( " movq %s,%s+%d" , 0 | |
614 | , P2APNAME , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
615 | /* | |
616 | * ask second pass to allocate known locals | |
617 | */ | |
618 | putlbracket( ftnno , -sizes[ cbn ].om_max ); | |
619 | /* | |
620 | * and zero them if checking is on | |
621 | * by calling zframe( bytes of locals , highest local address ); | |
622 | */ | |
c4e911b6 PK |
623 | if ( opt( 't' ) ) { |
624 | if ( ( -sizes[ cbn ].om_max ) > DPOFF1 ) { | |
625 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
626 | , "_ZFRAME" ); | |
627 | putleaf( P2ICON , ( -sizes[ cbn ].om_max ) - DPOFF1 | |
628 | , 0 , P2INT , 0 ); | |
629 | putLV( 0 , cbn , sizes[ cbn ].om_max , P2CHAR ); | |
630 | putop( P2LISTOP , P2INT ); | |
631 | putop( P2CALL , P2INT ); | |
632 | putdot( filename , line ); | |
633 | } | |
634 | /* | |
635 | * check number of longs of arguments | |
636 | * this can only be wrong for formal calls. | |
637 | */ | |
638 | if ( fp -> class != PROG ) { | |
639 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2PTR , P2FTN | P2INT ) , | |
640 | "_NARGCHK" ); | |
641 | putleaf( P2ICON , | |
642 | (fp->value[NL_OFFS] - DPOFF2) / sizeof(long) , | |
643 | 0 , P2INT , 0 ); | |
644 | putop( P2CALL , P2INT ); | |
645 | putdot( filename , line ); | |
646 | } | |
99878838 PK |
647 | } |
648 | #endif PC | |
649 | if ( monflg ) { | |
650 | if ( fp -> value[ NL_CNTR ] != 0 ) { | |
651 | inccnt( fp -> value [ NL_CNTR ] ); | |
652 | } | |
653 | inccnt( bodycnts[ fp -> nl_block & 037 ] ); | |
654 | } | |
655 | if (fp->class == PROG) { | |
656 | /* | |
657 | * The glorious buffers option. | |
658 | * 0 = don't buffer output | |
659 | * 1 = line buffer output | |
660 | * 2 = 512 byte buffer output | |
661 | */ | |
662 | # ifdef OBJ | |
663 | if (opt('b') != 1) | |
664 | put(1, O_BUFF | opt('b') << 8); | |
665 | # endif OBJ | |
666 | # ifdef PC | |
667 | if ( opt( 'b' ) != 1 ) { | |
668 | putleaf( P2ICON , 0 , 0 | |
669 | , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_BUFF" ); | |
670 | putleaf( P2ICON , opt( 'b' ) , 0 , P2INT , 0 ); | |
671 | putop( P2CALL , P2INT ); | |
672 | putdot( filename , line ); | |
673 | } | |
674 | # endif PC | |
675 | out = 0; | |
676 | for (p = fp->chain; p != NIL; p = p->chain) { | |
677 | if (strcmp(p->symbol, "input") == 0) { | |
678 | inp++; | |
679 | continue; | |
680 | } | |
681 | if (strcmp(p->symbol, "output") == 0) { | |
682 | out++; | |
683 | continue; | |
684 | } | |
685 | iop = lookup1(p->symbol); | |
686 | if (iop == NIL || bn != cbn) { | |
687 | error("File %s listed in program statement but not declared", p->symbol); | |
688 | continue; | |
689 | } | |
690 | if (iop->class != VAR) { | |
691 | error("File %s listed in program statement but declared as a %s", p->symbol, classes[iop->class]); | |
692 | continue; | |
693 | } | |
694 | if (iop->type == NIL) | |
695 | continue; | |
696 | if (iop->type->class != FILET) { | |
697 | error("File %s listed in program statement but defined as %s", | |
698 | p->symbol, nameof(iop->type)); | |
699 | continue; | |
700 | } | |
701 | # ifdef OBJ | |
702 | put(2, O_LV | bn << 8+INDX, iop->value[NL_OFFS]); | |
703 | i = lenstr(p->symbol,0); | |
704 | put(2, O_LVCON, i); | |
705 | putstr(p->symbol, 0); | |
706 | do { | |
707 | i--; | |
708 | } while (p->symbol+i == 0); | |
709 | put(2, O_CON24, i+1); | |
710 | put(2, O_CON24, text(iop->type) ? 0 : width(iop->type->type)); | |
711 | put(1, O_DEFNAME); | |
712 | # endif OBJ | |
713 | # ifdef PC | |
714 | putleaf( P2ICON , 0 , 0 | |
715 | , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
716 | , "_DEFNAME" ); | |
717 | putLV( p -> symbol , bn , iop -> value[NL_OFFS] | |
718 | , p2type( iop ) ); | |
719 | putCONG( p -> symbol , strlen( p -> symbol ) | |
720 | , LREQ ); | |
721 | putop( P2LISTOP , P2INT ); | |
722 | putleaf( P2ICON , strlen( p -> symbol ) | |
723 | , 0 , P2INT , 0 ); | |
724 | putop( P2LISTOP , P2INT ); | |
725 | putleaf( P2ICON | |
726 | , text(iop->type) ? 0 : width(iop->type->type) | |
727 | , 0 , P2INT , 0 ); | |
728 | putop( P2LISTOP , P2INT ); | |
729 | putop( P2CALL , P2INT ); | |
730 | putdot( filename , line ); | |
731 | # endif PC | |
732 | } | |
733 | if (out == 0 && fp->chain != NIL) { | |
734 | recovered(); | |
735 | error("The file output must appear in the program statement file list"); | |
736 | } | |
737 | } | |
738 | /* | |
739 | * Process the prog/proc/func body | |
740 | */ | |
741 | noreach = 0; | |
742 | line = bundle[1]; | |
743 | statlist(blk); | |
744 | # ifdef PTREE | |
745 | { | |
746 | pPointer Body = tCopy( blk ); | |
747 | ||
748 | pDEF( PorFHeader[ nesting -- ] ).PorFBody = Body; | |
749 | } | |
750 | # endif PTREE | |
751 | # ifdef OBJ | |
752 | if (cbn== 1 && monflg != 0) { | |
753 | patchfil(cntpatch - 2, cnts, 2); | |
754 | patchfil(nfppatch - 2, pfcnt, 2); | |
755 | } | |
756 | # endif OBJ | |
757 | # ifdef PC | |
758 | if ( fp -> class == PROG && monflg ) { | |
759 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
760 | , "_PMFLUSH" ); | |
761 | putleaf( P2ICON , cnts , 0 , P2INT , 0 ); | |
762 | putleaf( P2ICON , pfcnt , 0 , P2INT , 0 ); | |
763 | putop( P2LISTOP , P2INT ); | |
764 | putop( P2CALL , P2INT ); | |
765 | putdot( filename , line ); | |
766 | } | |
767 | # endif PC | |
768 | if (fp->class == PROG && inp == 0 && (input->nl_flags & (NUSED|NMOD)) != 0) { | |
769 | recovered(); | |
770 | error("Input is used but not defined in the program statement"); | |
771 | } | |
772 | /* | |
773 | * Clean up the symbol table displays and check for unresolves | |
774 | */ | |
775 | line = endline; | |
776 | b = cbn; | |
777 | Fp = fp; | |
778 | chkref = syneflg == errcnt[cbn] && opt('w') == 0; | |
779 | for (i = 0; i <= 077; i++) { | |
780 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
781 | /* | |
782 | * Check for variables defined | |
783 | * but not referenced | |
784 | */ | |
785 | if (chkref && p->symbol != NIL) | |
786 | switch (p->class) { | |
787 | case FIELD: | |
788 | /* | |
789 | * If the corresponding record is | |
790 | * unused, we shouldn't complain about | |
791 | * the fields. | |
792 | */ | |
793 | default: | |
794 | if ((p->nl_flags & (NUSED|NMOD)) == 0) { | |
795 | warning(); | |
796 | nerror("%s %s is neither used nor set", classes[p->class], p->symbol); | |
797 | break; | |
798 | } | |
799 | /* | |
800 | * If a var parameter is either | |
801 | * modified or used that is enough. | |
802 | */ | |
803 | if (p->class == REF) | |
804 | continue; | |
805 | # ifdef OBJ | |
806 | if ((p->nl_flags & NUSED) == 0) { | |
807 | warning(); | |
808 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
809 | break; | |
810 | } | |
811 | # endif OBJ | |
812 | # ifdef PC | |
813 | if (((p->nl_flags & NUSED) == 0) && ((p->ext_flags & NEXTERN) == 0)) { | |
814 | warning(); | |
815 | nerror("%s %s is never used", classes[p->class], p->symbol); | |
816 | break; | |
817 | } | |
818 | # endif PC | |
819 | if ((p->nl_flags & NMOD) == 0) { | |
820 | warning(); | |
821 | nerror("%s %s is used but never set", classes[p->class], p->symbol); | |
822 | break; | |
823 | } | |
824 | case LABEL: | |
825 | case FVAR: | |
826 | case BADUSE: | |
827 | break; | |
828 | } | |
829 | switch (p->class) { | |
830 | case BADUSE: | |
831 | cp = "s"; | |
832 | if (p->chain->ud_next == NIL) | |
833 | cp++; | |
834 | eholdnl(); | |
835 | if (p->value[NL_KINDS] & ISUNDEF) | |
836 | nerror("%s undefined on line%s", p->symbol, cp); | |
837 | else | |
838 | nerror("%s improperly used on line%s", p->symbol, cp); | |
839 | pnumcnt = 10; | |
840 | pnums(p->chain); | |
841 | pchr('\n'); | |
842 | break; | |
843 | ||
844 | case FUNC: | |
845 | case PROC: | |
846 | # ifdef OBJ | |
847 | if ((p->nl_flags & NFORWD)) | |
848 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
849 | # endif OBJ | |
850 | # ifdef PC | |
851 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
852 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
853 | # endif PC | |
854 | break; | |
855 | ||
856 | case LABEL: | |
857 | if (p->nl_flags & NFORWD) | |
858 | nerror("label %s was declared but not defined", p->symbol); | |
859 | break; | |
860 | case FVAR: | |
861 | if ((p->nl_flags & NMOD) == 0) | |
862 | nerror("No assignment to the function variable"); | |
863 | break; | |
864 | } | |
865 | } | |
866 | /* | |
867 | * Pop this symbol | |
868 | * table slot | |
869 | */ | |
870 | disptab[i] = p; | |
871 | } | |
872 | ||
873 | # ifdef OBJ | |
874 | put(1, O_END); | |
875 | # endif OBJ | |
876 | # ifdef PC | |
877 | /* | |
878 | * if there were file variables declared at this level | |
879 | * call pclose( &__disply[ cbn ] ) to clean them up. | |
880 | */ | |
881 | if ( dfiles[ cbn ] ) { | |
882 | putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) | |
883 | , "_PCLOSE" ); | |
884 | putRV( DISPLAYNAME , 0 , cbn * sizeof( struct dispsave ) | |
885 | , P2PTR | P2CHAR ); | |
886 | putop( P2CALL , P2INT ); | |
887 | putdot( filename , line ); | |
888 | } | |
889 | /* | |
890 | * if this is a function, | |
891 | * the function variable is the return value. | |
892 | * if it's a scalar valued function, return scalar, | |
893 | * else, return a pointer to the structure value. | |
894 | */ | |
895 | if ( fp -> class == FUNC ) { | |
896 | struct nl *fvar = fp -> ptr[ NL_FVAR ]; | |
897 | long fvartype = p2type( fvar -> type ); | |
c4e911b6 PK |
898 | long label; |
899 | char labelname[ BUFSIZ ]; | |
99878838 PK |
900 | |
901 | switch ( classify( fvar -> type ) ) { | |
902 | case TBOOL: | |
903 | case TCHAR: | |
904 | case TINT: | |
905 | case TSCAL: | |
906 | case TDOUBLE: | |
907 | case TPTR: | |
908 | putRV( fvar -> symbol , ( fvar -> nl_block ) & 037 | |
909 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
910 | break; | |
911 | default: | |
c4e911b6 PK |
912 | label = getlab(); |
913 | sprintf( labelname , PREFIXFORMAT , | |
914 | LABELPREFIX , label ); | |
915 | putprintf( " .data" , 0 ); | |
916 | putprintf( " .lcomm %s,%d" , 0 , | |
917 | labelname , lwidth( fvar -> type ) ); | |
918 | putprintf( " .text" , 0 ); | |
55841528 | 919 | putleaf( P2NAME , 0 , 0 , fvartype , labelname ); |
99878838 PK |
920 | putLV( fvar -> symbol , ( fvar -> nl_block ) & 037 |
921 | , fvar -> value[ NL_OFFS ] , fvartype ); | |
c4e911b6 PK |
922 | putstrop( P2STASG , fvartype , lwidth( fvar -> type ) , |
923 | align( fvar -> type ) ); | |
55841528 PK |
924 | putdot( filename , line ); |
925 | putleaf( P2ICON , 0 , 0 , fvartype , labelname ); | |
99878838 PK |
926 | break; |
927 | } | |
928 | putop( P2FORCE , fvartype ); | |
929 | putdot( filename , line ); | |
930 | } | |
931 | /* | |
932 | * restore old display entry from save area | |
933 | */ | |
934 | ||
935 | putprintf( " movq %d(%s),%s+%d" , 0 | |
936 | , DSAVEOFFSET , P2FPNAME | |
937 | , DISPLAYNAME , cbn * sizeof(struct dispsave) ); | |
938 | stabrbrac( cbn ); | |
939 | putprintf( " ret" , 0 ); | |
940 | /* | |
941 | * let the second pass allocate locals | |
942 | */ | |
943 | putlab( botlabel ); | |
944 | putprintf( " subl2 $LF%d,sp" , 0 , ftnno ); | |
945 | putrbracket( ftnno ); | |
946 | putjbr( toplabel ); | |
947 | /* | |
948 | * declare pcp counters, if any | |
949 | */ | |
950 | if ( monflg && fp -> class == PROG ) { | |
951 | putprintf( " .data" , 0 ); | |
952 | putprintf( " .comm " , 1 ); | |
953 | putprintf( PCPCOUNT , 1 ); | |
954 | putprintf( ",%d" , 0 , ( cnts + 1 ) * sizeof (long) ); | |
955 | putprintf( " .text" , 0 ); | |
956 | } | |
957 | # endif PC | |
958 | #ifdef DEBUG | |
959 | dumpnl(fp->ptr[2], fp->symbol); | |
960 | #endif | |
961 | /* | |
962 | * Restore the | |
963 | * (virtual) name list | |
964 | * position | |
965 | */ | |
966 | nlfree(fp->ptr[2]); | |
967 | /* | |
968 | * Proc/func has been | |
969 | * resolved | |
970 | */ | |
971 | fp->nl_flags &= ~NFORWD; | |
972 | /* | |
973 | * Patch the beg | |
974 | * of the proc/func to | |
975 | * the proper variable size | |
976 | */ | |
977 | if (Fp == NIL) | |
978 | elineon(); | |
979 | # ifdef OBJ | |
980 | patchfil(var, sizes[cbn].om_max, 2); | |
981 | # endif OBJ | |
982 | cbn--; | |
983 | if (inpflist(fp->symbol)) { | |
984 | opop('l'); | |
985 | } | |
986 | } | |
987 | ||
988 | ||
989 | /* | |
990 | * Segend is called to check for | |
991 | * unresolved variables, funcs and | |
992 | * procs, and deliver unresolved and | |
993 | * baduse error diagnostics at the | |
994 | * end of a routine segment (a separately | |
995 | * compiled segment that is not the | |
996 | * main program) for PC. This | |
997 | * routine should only be called | |
998 | * by PC (not standard). | |
999 | */ | |
1000 | segend() | |
1001 | { | |
1002 | register struct nl *p; | |
1003 | register int i,b; | |
1004 | char *cp; | |
1005 | ||
1006 | #ifdef PC | |
1007 | if (opt('s')) { | |
1008 | standard(); | |
1009 | error("Separately compiled routine segments are not standard."); | |
1010 | } else { | |
1011 | b = cbn; | |
1012 | for (i=0; i<077; i++) { | |
1013 | for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) { | |
1014 | switch (p->class) { | |
1015 | case BADUSE: | |
1016 | cp = 's'; | |
1017 | if (p->chain->ud_next == NIL) | |
1018 | cp++; | |
1019 | eholdnl(); | |
1020 | if (p->value[NL_KINDS] & ISUNDEF) | |
1021 | nerror("%s undefined on line%s", p->symbol, cp); | |
1022 | else | |
1023 | nerror("%s improperly used on line%s", p->symbol, cp); | |
1024 | pnumcnt = 10; | |
1025 | pnums(p->chain); | |
1026 | pchr('\n'); | |
1027 | break; | |
1028 | ||
1029 | case FUNC: | |
1030 | case PROC: | |
1031 | if ((p->nl_flags & NFORWD) && ((p->ext_flags & NEXTERN) == 0)) | |
1032 | nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol); | |
1033 | break; | |
1034 | ||
1035 | case FVAR: | |
1036 | if (((p->nl_flags & NMOD) == 0) && ((p->chain->ext_flags & NEXTERN) == 0)) | |
1037 | nerror("No assignment to the function variable"); | |
1038 | break; | |
1039 | } | |
1040 | } | |
1041 | disptab[i] = p; | |
1042 | } | |
1043 | } | |
1044 | #endif PC | |
1045 | #ifdef OBJ | |
1046 | error("Missing program statement and program body"); | |
1047 | #endif OBJ | |
1048 | ||
1049 | } | |
1050 | ||
1051 | ||
1052 | /* | |
1053 | * Level1 does level one processing for | |
1054 | * separately compiled routine segments | |
1055 | */ | |
1056 | level1() | |
1057 | { | |
1058 | ||
1059 | # ifdef OBJ | |
1060 | error("Missing program statement"); | |
1061 | # endif OBJ | |
1062 | # ifdef PC | |
1063 | if (opt('s')) { | |
1064 | standard(); | |
1065 | error("Missing program statement"); | |
1066 | } | |
1067 | # endif PC | |
1068 | ||
1069 | cbn++; | |
1070 | sizes[cbn].om_max = sizes[cbn].om_off = -DPOFF1; | |
af97bcfa PK |
1071 | gotos[cbn] = NIL; |
1072 | errcnt[cbn] = syneflg; | |
1073 | parts[ cbn ] = NIL; | |
1074 | dfiles[ cbn ] = FALSE; | |
99878838 PK |
1075 | progseen++; |
1076 | } | |
1077 | ||
1078 | ||
1079 | ||
1080 | pnums(p) | |
1081 | struct udinfo *p; | |
1082 | { | |
1083 | ||
1084 | if (p->ud_next != NIL) | |
1085 | pnums(p->ud_next); | |
1086 | if (pnumcnt == 0) { | |
1087 | printf("\n\t"); | |
1088 | pnumcnt = 20; | |
1089 | } | |
1090 | pnumcnt--; | |
1091 | printf(" %d", p->ud_line); | |
1092 | } | |
1093 | ||
1094 | nerror(a1, a2, a3) | |
1095 | { | |
1096 | ||
1097 | if (Fp != NIL) { | |
1098 | yySsync(); | |
1099 | #ifndef PI1 | |
1100 | if (opt('l')) | |
1101 | yyoutline(); | |
1102 | #endif | |
1103 | yysetfile(filename); | |
1104 | printf("In %s %s:\n", classes[Fp->class], Fp->symbol); | |
1105 | Fp = NIL; | |
1106 | elineoff(); | |
1107 | } | |
1108 | error(a1, a2, a3); | |
1109 | } |