1 %{
2 /*
3 * Parser for the Aic7xxx SCSI Host adapter sequencer assembler.
4 *
5 * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs.
6 * Copyright (c) 2001, 2002 Adaptec Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions, and the following disclaimer,
14 * without modification.
15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
16 * substantially similar to the "NO WARRANTY" disclaimer below
17 * ("Disclaimer") and any redistribution must be conditioned upon
18 * including a substantially similar Disclaimer requirement for further
19 * binary redistribution.
20 * 3. Neither the names of the above-listed copyright holders nor the names
21 * of any contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
23 *
24 * Alternatively, this software may be distributed under the terms of the
25 * GNU General Public License ("GPL") version 2 as published by the Free
26 * Software Foundation.
27 *
28 * NO WARRANTY
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
38 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGES.
40 *
41 * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_gram.y#30 $
42 *
43 * $FreeBSD$
44 */
45
46 #include <sys/types.h>
47
48 #include <inttypes.h>
49 #include <regex.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <sysexits.h>
54
55 #ifdef __linux__
56 #include "../queue.h"
57 #else
58 #include <sys/queue.h>
59 #endif
60
61 #include "aicasm.h"
62 #include "aicasm_symbol.h"
63 #include "aicasm_insformat.h"
64
65 int yylineno;
66 char *yyfilename;
67 char stock_prefix[] = "aic_";
68 char *prefix = stock_prefix;
69 char *patch_arg_list;
70 char *versions;
71 static char errbuf[255];
72 static char regex_pattern[255];
73 static symbol_t *cur_symbol;
74 static symbol_t *field_symbol;
75 static symbol_t *scb_or_sram_symbol;
76 static symtype cur_symtype;
77 static symbol_ref_t accumulator;
78 static symbol_ref_t mode_ptr;
79 static symbol_ref_t allones;
80 static symbol_ref_t allzeros;
81 static symbol_ref_t none;
82 static symbol_ref_t sindex;
83 static int instruction_ptr;
84 static int num_srams;
85 static int sram_or_scb_offset;
86 static int download_constant_count;
87 static int in_critical_section;
88 static u_int enum_increment;
89 static u_int enum_next_value;
90
91 static void process_field(int field_type, symbol_t *sym, int mask);
92 static void initialize_symbol(symbol_t *symbol);
93 static void add_macro_arg(const char *argtext, int position);
94 static void add_macro_body(const char *bodytext);
95 static void process_register(symbol_t **p_symbol);
96 static void format_1_instr(int opcode, symbol_ref_t *dest,
97 expression_t *immed, symbol_ref_t *src, int ret);
98 static void format_2_instr(int opcode, symbol_ref_t *dest,
99 expression_t *places, symbol_ref_t *src, int ret);
100 static void format_3_instr(int opcode, symbol_ref_t *src,
101 expression_t *immed, symbol_ref_t *address);
102 static void test_readable_symbol(symbol_t *symbol);
103 static void test_writable_symbol(symbol_t *symbol);
104 static void type_check(symbol_ref_t *sym, expression_t *expression, int and_op);
105 static void make_expression(expression_t *immed, int value);
106 static void add_conditional(symbol_t *symbol);
107 static void add_version(const char *verstring);
108 static int is_download_const(expression_t *immed);
109 static int is_location_address(symbol_t *symbol);
110 void yyerror(const char *string);
111
112 #define SRAM_SYMNAME "SRAM_BASE"
113 #define SCB_SYMNAME "SCB_BASE"
114 %}
115
116 %union {
117 u_int value;
118 char *str;
119 symbol_t *sym;
120 symbol_ref_t sym_ref;
121 expression_t expression;
122 }
123
124 %token T_REGISTER
125
126 %token <value> T_CONST
127
128 %token T_EXPORT
129
130 %token T_DOWNLOAD
131
132 %token T_SCB
133
134 %token T_SRAM
135
136 %token T_ALIAS
137
138 %token T_SIZE
139
140 %token T_EXPR_LSHIFT
141
142 %token T_EXPR_RSHIFT
143
144 %token <value> T_ADDRESS
145
146 %token T_COUNT
147
148 %token T_ACCESS_MODE
149
150 %token T_DONT_GENERATE_DEBUG_CODE
151
152 %token T_MODES
153
154 %token T_DEFINE
155
156 %token T_SET_SRC_MODE
157
158 %token T_SET_DST_MODE
159
160 %token <value> T_MODE
161
162 %token T_BEGIN_CS
163
164 %token T_END_CS
165
166 %token T_PAD_PAGE
167
168 %token T_FIELD
169
170 %token T_ENUM
171
172 %token T_MASK
173
174 %token <value> T_NUMBER
175
176 %token <str> T_PATH T_STRING T_ARG T_MACROBODY
177
178 %token <sym> T_CEXPR
179
180 %token T_EOF T_INCLUDE T_VERSION T_PREFIX T_PATCH_ARG_LIST
181
182 %token <value> T_SHR T_SHL T_ROR T_ROL
183
184 %token <value> T_MVI T_MOV T_CLR T_BMOV
185
186 %token <value> T_JMP T_JC T_JNC T_JE T_JNE T_JNZ T_JZ T_CALL
187
188 %token <value> T_ADD T_ADC
189
190 %token <value> T_INC T_DEC
191
192 %token <value> T_STC T_CLC
193
194 %token <value> T_CMP T_NOT T_XOR
195
196 %token <value> T_TEST T_AND
197
198 %token <value> T_OR
199
200 /* 16 bit extensions, not implemented
201 * %token <value> T_OR16 T_AND16 T_XOR16 T_ADD16
202 * %token <value> T_ADC16 T_MVI16 T_TEST16 T_CMP16 T_CMPXCHG
203 */
204 %token T_RET
205
206 %token T_NOP
207
208 %token T_ACCUM T_ALLONES T_ALLZEROS T_NONE T_SINDEX T_MODE_PTR
209
210 %token T_A
211
212 %token <sym> T_SYMBOL
213
214 %token T_NL
215
216 %token T_IF T_ELSE T_ELSE_IF T_ENDIF
217
218 %type <sym_ref> reg_symbol address destination source opt_source
219
220 %type <expression> expression immediate immediate_or_a
221
222 %type <value> export ret f1_opcode f2_opcode jmp_jc_jnc_call jz_jnz je_jne
223
224 %type <value> mode_value mode_list macro_arglist
225
226 %left '|'
227 %left '&'
228 %left T_EXPR_LSHIFT T_EXPR_RSHIFT
229 %left '+' '-'
230 %left '*' '/'
231 %right '~'
232 %nonassoc UMINUS
233 %%
234
235 program:
236 include
237 | program include
238 | prefix
239 | program prefix
240 | patch_arg_list
241 | program patch_arg_list
242 | version
243 | program version
244 | register
245 | program register
246 | constant
247 | program constant
248 | macrodefn
249 | program macrodefn
250 | scratch_ram
251 | program scratch_ram
252 | scb
253 | program scb
254 | label
255 | program label
256 | set_src_mode
257 | program set_src_mode
258 | set_dst_mode
259 | program set_dst_mode
260 | critical_section_start
261 | program critical_section_start
262 | critical_section_end
263 | program critical_section_end
264 | conditional
265 | program conditional
266 | code
267 | program code
268 ;
269
270 include:
271 T_INCLUDE '<' T_PATH '>'
272 {
273 include_file($3, BRACKETED_INCLUDE);
274 }
275 | T_INCLUDE '"' T_PATH '"'
276 {
277 include_file($3, QUOTED_INCLUDE);
278 }
279 ;
280
281 prefix:
282 T_PREFIX '=' T_STRING
283 {
284 if (prefix != stock_prefix)
285 stop("Prefix multiply defined",
286 EX_DATAERR);
287 prefix = strdup($3);
288 if (prefix == NULL)
289 stop("Unable to record prefix", EX_SOFTWARE);
290 }
291 ;
292
293 patch_arg_list:
294 T_PATCH_ARG_LIST '=' T_STRING
295 {
296 if (patch_arg_list != NULL)
297 stop("Patch argument list multiply defined",
298 EX_DATAERR);
299 patch_arg_list = strdup($3);
300 if (patch_arg_list == NULL)
301 stop("Unable to record patch arg list", EX_SOFTWARE);
302 }
303 ;
304
305 version:
306 T_VERSION '=' T_STRING
307 { add_version($3); }
308 ;
309
310 register:
311 T_REGISTER { cur_symtype = REGISTER; } reg_definition
312 ;
313
314 reg_definition:
315 T_SYMBOL '{'
316 {
317 if ($1->type != UNINITIALIZED) {
318 stop("Register multiply defined", EX_DATAERR);
319 /* NOTREACHED */
320 }
321 cur_symbol = $1;
322 cur_symbol->type = cur_symtype;
323 initialize_symbol(cur_symbol);
324 }
325 reg_attribute_list
326 '}'
327 {
328 /*
329 * Default to allowing everything in for registers
330 * with no bit or mask definitions.
331 */
332 if (cur_symbol->info.rinfo->valid_bitmask == 0)
333 cur_symbol->info.rinfo->valid_bitmask = 0xFF;
334
335 if (cur_symbol->info.rinfo->size == 0)
336 cur_symbol->info.rinfo->size = 1;
337
338 /*
339 * This might be useful for registers too.
340 */
341 if (cur_symbol->type != REGISTER) {
342 if (cur_symbol->info.rinfo->address == 0)
343 cur_symbol->info.rinfo->address =
344 sram_or_scb_offset;
345 sram_or_scb_offset +=
346 cur_symbol->info.rinfo->size;
347 }
348 cur_symbol = NULL;
349 }
350 ;
351
352 reg_attribute_list:
353 reg_attribute
354 | reg_attribute_list reg_attribute
355 ;
356
357 reg_attribute:
358 reg_address
359 | size
360 | count
361 | access_mode
362 | dont_generate_debug_code
363 | modes
364 | field_defn
365 | enum_defn
366 | mask_defn
367 | alias
368 | accumulator
369 | mode_pointer
370 | allones
371 | allzeros
372 | none
373 | sindex
374 ;
375
376 reg_address:
377 T_ADDRESS T_NUMBER
378 {
379 cur_symbol->info.rinfo->address = $2;
380 }
381 ;
382
383 size:
384 T_SIZE T_NUMBER
385 {
386 cur_symbol->info.rinfo->size = $2;
387 if (scb_or_sram_symbol != NULL) {
388 u_int max_addr;
389 u_int sym_max_addr;
390
391 max_addr = scb_or_sram_symbol->info.rinfo->address
392 + scb_or_sram_symbol->info.rinfo->size;
393 sym_max_addr = cur_symbol->info.rinfo->address
394 + cur_symbol->info.rinfo->size;
395
396 if (sym_max_addr > max_addr)
397 stop("SCB or SRAM space exhausted", EX_DATAERR);
398 }
399 }
400 ;
401
402 count:
403 T_COUNT T_NUMBER
404 {
405 cur_symbol->count += $2;
406 }
407 ;
408
409 access_mode:
410 T_ACCESS_MODE T_MODE
411 {
412 cur_symbol->info.rinfo->mode = $2;
413 }
414 ;
415
416 dont_generate_debug_code:
417 T_DONT_GENERATE_DEBUG_CODE
418 {
419 cur_symbol->dont_generate_debug_code = 1;
420 }
421 ;
422
423 modes:
424 T_MODES mode_list
425 {
426 cur_symbol->info.rinfo->modes = $2;
427 }
428 ;
429
430 mode_list:
431 mode_value
432 {
433 $$ = $1;
434 }
435 | mode_list ',' mode_value
436 {
437 $$ = $1 | $3;
438 }
439 ;
440
441 mode_value:
442 T_NUMBER
443 {
444 if ($1 > 4) {
445 stop("Valid register modes range between 0 and 4.",
446 EX_DATAERR);
447 /* NOTREACHED */
448 }
449
450 $$ = (0x1 << $1);
451 }
452 | T_SYMBOL
453 {
454 symbol_t *symbol;
455
456 symbol = $1;
457 if (symbol->type != CONST) {
458 stop("Only \"const\" symbols allowed in "
459 "mode definitions.", EX_DATAERR);
460 /* NOTREACHED */
461 }
462 if (symbol->info.cinfo->value > 4) {
463 stop("Valid register modes range between 0 and 4.",
464 EX_DATAERR);
465 /* NOTREACHED */
466 }
467 $$ = (0x1 << symbol->info.cinfo->value);
468 }
469 ;
470
471 field_defn:
472 T_FIELD
473 {
474 field_symbol = NULL;
475 enum_next_value = 0;
476 enum_increment = 1;
477 }
478 '{' enum_entry_list '}'
479 | T_FIELD T_SYMBOL expression
480 {
481 process_field(FIELD, $2, $3.value);
482 field_symbol = $2;
483 enum_next_value = 0;
484 enum_increment = 0x01 << (ffs($3.value) - 1);
485 }
486 '{' enum_entry_list '}'
487 | T_FIELD T_SYMBOL expression
488 {
489 process_field(FIELD, $2, $3.value);
490 }
491 ;
492
493 enum_defn:
494 T_ENUM
495 {
496 field_symbol = NULL;
497 enum_next_value = 0;
498 enum_increment = 1;
499 }
500 '{' enum_entry_list '}'
501 | T_ENUM T_SYMBOL expression
502 {
503 process_field(ENUM, $2, $3.value);
504 field_symbol = $2;
505 enum_next_value = 0;
506 enum_increment = 0x01 << (ffs($3.value) - 1);
507 }
508 '{' enum_entry_list '}'
509 ;
510
511 enum_entry_list:
512 enum_entry
513 | enum_entry_list ',' enum_entry
514 ;
515
516 enum_entry:
517 T_SYMBOL
518 {
519 process_field(ENUM_ENTRY, $1, enum_next_value);
520 enum_next_value += enum_increment;
521 }
522 | T_SYMBOL expression
523 {
524 process_field(ENUM_ENTRY, $1, $2.value);
525 enum_next_value = $2.value + enum_increment;
526 }
527 ;
528
529 mask_defn:
530 T_MASK T_SYMBOL expression
531 {
532 process_field(MASK, $2, $3.value);
533 }
534 ;
535
536 alias:
537 T_ALIAS T_SYMBOL
538 {
539 if ($2->type != UNINITIALIZED) {
540 stop("Re-definition of register alias",
541 EX_DATAERR);
542 /* NOTREACHED */
543 }
544 $2->type = ALIAS;
545 initialize_symbol($2);
546 $2->info.ainfo->parent = cur_symbol;
547 }
548 ;
549
550 accumulator:
551 T_ACCUM
552 {
553 if (accumulator.symbol != NULL) {
554 stop("Only one accumulator definition allowed",
555 EX_DATAERR);
556 /* NOTREACHED */
557 }
558 accumulator.symbol = cur_symbol;
559 }
560 ;
561
562 mode_pointer:
563 T_MODE_PTR
564 {
565 if (mode_ptr.symbol != NULL) {
566 stop("Only one mode pointer definition allowed",
567 EX_DATAERR);
568 /* NOTREACHED */
569 }
570 mode_ptr.symbol = cur_symbol;
571 }
572 ;
573
574 allones:
575 T_ALLONES
576 {
577 if (allones.symbol != NULL) {
578 stop("Only one definition of allones allowed",
579 EX_DATAERR);
580 /* NOTREACHED */
581 }
582 allones.symbol = cur_symbol;
583 }
584 ;
585
586 allzeros:
587 T_ALLZEROS
588 {
589 if (allzeros.symbol != NULL) {
590 stop("Only one definition of allzeros allowed",
591 EX_DATAERR);
592 /* NOTREACHED */
593 }
594 allzeros.symbol = cur_symbol;
595 }
596 ;
597
598 none:
599 T_NONE
600 {
601 if (none.symbol != NULL) {
602 stop("Only one definition of none allowed",
603 EX_DATAERR);
604 /* NOTREACHED */
605 }
606 none.symbol = cur_symbol;
607 }
608 ;
609
610 sindex:
611 T_SINDEX
612 {
613 if (sindex.symbol != NULL) {
614 stop("Only one definition of sindex allowed",
615 EX_DATAERR);
616 /* NOTREACHED */
617 }
618 sindex.symbol = cur_symbol;
619 }
620 ;
621
622 expression:
623 expression '|' expression
624 {
625 $$.value = $1.value | $3.value;
626 symlist_merge(&$$.referenced_syms,
627 &$1.referenced_syms,
628 &$3.referenced_syms);
629 }
630 | expression '&' expression
631 {
632 $$.value = $1.value & $3.value;
633 symlist_merge(&$$.referenced_syms,
634 &$1.referenced_syms,
635 &$3.referenced_syms);
636 }
637 | expression '+' expression
638 {
639 $$.value = $1.value + $3.value;
640 symlist_merge(&$$.referenced_syms,
641 &$1.referenced_syms,
642 &$3.referenced_syms);
643 }
644 | expression '-' expression
645 {
646 $$.value = $1.value - $3.value;
647 symlist_merge(&($$.referenced_syms),
648 &($1.referenced_syms),
649 &($3.referenced_syms));
650 }
651 | expression '*' expression
652 {
653 $$.value = $1.value * $3.value;
654 symlist_merge(&($$.referenced_syms),
655 &($1.referenced_syms),
656 &($3.referenced_syms));
657 }
658 | expression '/' expression
659 {
660 $$.value = $1.value / $3.value;
661 symlist_merge(&($$.referenced_syms),
662 &($1.referenced_syms),
663 &($3.referenced_syms));
664 }
665 | expression T_EXPR_LSHIFT expression
666 {
667 $$.value = $1.value << $3.value;
668 symlist_merge(&$$.referenced_syms,
669 &$1.referenced_syms,
670 &$3.referenced_syms);
671 }
672 | expression T_EXPR_RSHIFT expression
673 {
674 $$.value = $1.value >> $3.value;
675 symlist_merge(&$$.referenced_syms,
676 &$1.referenced_syms,
677 &$3.referenced_syms);
678 }
679 | '(' expression ')'
680 {
681 $$ = $2;
682 }
683 | '~' expression
684 {
685 $$ = $2;
686 $$.value = (~$$.value) & 0xFF;
687 }
688 | '-' expression %prec UMINUS
689 {
690 $$ = $2;
691 $$.value = -$$.value;
692 }
693 | T_NUMBER
694 {
695 $$.value = $1;
696 SLIST_INIT(&$$.referenced_syms);
697 }
698 | T_SYMBOL
699 {
700 symbol_t *symbol;
701
702 symbol = $1;
703 switch (symbol->type) {
704 case ALIAS:
705 symbol = $1->info.ainfo->parent;
706 case REGISTER:
707 case SCBLOC:
708 case SRAMLOC:
709 $$.value = symbol->info.rinfo->address;
710 break;
711 case MASK:
712 case FIELD:
713 case ENUM:
714 case ENUM_ENTRY:
715 $$.value = symbol->info.finfo->value;
716 break;
717 case DOWNLOAD_CONST:
718 case CONST:
719 $$.value = symbol->info.cinfo->value;
720 break;
721 case UNINITIALIZED:
722 default:
723 {
724 snprintf(errbuf, sizeof(errbuf),
725 "Undefined symbol %s referenced",
726 symbol->name);
727 stop(errbuf, EX_DATAERR);
728 /* NOTREACHED */
729 break;
730 }
731 }
732 SLIST_INIT(&$$.referenced_syms);
733 symlist_add(&$$.referenced_syms, symbol, SYMLIST_INSERT_HEAD);
734 }
735 ;
736
737 constant:
738 T_CONST T_SYMBOL expression
739 {
740 if ($2->type != UNINITIALIZED) {
741 stop("Re-definition of symbol as a constant",
742 EX_DATAERR);
743 /* NOTREACHED */
744 }
745 $2->type = CONST;
746 initialize_symbol($2);
747 $2->info.cinfo->value = $3.value;
748 }
749 | T_CONST T_SYMBOL T_DOWNLOAD
750 {
751 if ($1) {
752 stop("Invalid downloaded constant declaration",
753 EX_DATAERR);
754 /* NOTREACHED */
755 }
756 if ($2->type != UNINITIALIZED) {
757 stop("Re-definition of symbol as a downloaded constant",
758 EX_DATAERR);
759 /* NOTREACHED */
760 }
761 $2->type = DOWNLOAD_CONST;
762 initialize_symbol($2);
763 $2->info.cinfo->value = download_constant_count++;
764 }
765 ;
766
767 macrodefn_prologue:
768 T_DEFINE T_SYMBOL
769 {
770 if ($2->type != UNINITIALIZED) {
771 stop("Re-definition of symbol as a macro",
772 EX_DATAERR);
773 /* NOTREACHED */
774 }
775 cur_symbol = $2;
776 cur_symbol->type = MACRO;
777 initialize_symbol(cur_symbol);
778 }
779 ;
780
781 macrodefn:
782 macrodefn_prologue T_MACROBODY
783 {
784 add_macro_body($2);
785 }
786 | macrodefn_prologue '(' macro_arglist ')' T_MACROBODY
787 {
788 add_macro_body($5);
789 cur_symbol->info.macroinfo->narg = $3;
790 }
791 ;
792
793 macro_arglist:
794 {
795 /* Macros can take no arguments */
796 $$ = 0;
797 }
798 | T_ARG
799 {
800 $$ = 1;
801 add_macro_arg($1, 0);
802 }
803 | macro_arglist ',' T_ARG
804 {
805 if ($1 == 0) {
806 stop("Comma without preceding argument in arg list",
807 EX_DATAERR);
808 /* NOTREACHED */
809 }
810 $$ = $1 + 1;
811 add_macro_arg($3, $1);
812 }
813 ;
814
815 scratch_ram:
816 T_SRAM '{'
817 {
818 snprintf(errbuf, sizeof(errbuf), "%s%d", SRAM_SYMNAME,
819 num_srams);
820 cur_symbol = symtable_get(SRAM_SYMNAME);
821 cur_symtype = SRAMLOC;
822 cur_symbol->type = SRAMLOC;
823 initialize_symbol(cur_symbol);
824 cur_symbol->count += 1;
825 }
826 reg_address
827 {
828 sram_or_scb_offset = cur_symbol->info.rinfo->address;
829 }
830 size
831 {
832 scb_or_sram_symbol = cur_symbol;
833 }
834 scb_or_sram_attributes
835 '}'
836 {
837 cur_symbol = NULL;
838 scb_or_sram_symbol = NULL;
839 }
840 ;
841
842 scb:
843 T_SCB '{'
844 {
845 cur_symbol = symtable_get(SCB_SYMNAME);
846 cur_symtype = SCBLOC;
847 if (cur_symbol->type != UNINITIALIZED) {
848 stop("Only one SRAM definition allowed",
849 EX_SOFTWARE);
850 /* NOTREACHED */
851 }
852 cur_symbol->type = SCBLOC;
853 initialize_symbol(cur_symbol);
854 /* 64 bytes of SCB space */
855 cur_symbol->info.rinfo->size = 64;
856 cur_symbol->count += 1;
857 }
858 reg_address
859 {
860 sram_or_scb_offset = cur_symbol->info.rinfo->address;
861 }
862 size
863 {
864 scb_or_sram_symbol = cur_symbol;
865 }
866 scb_or_sram_attributes
867 '}'
868 {
869 cur_symbol = NULL;
870 scb_or_sram_symbol = NULL;
871 }
872 ;
873
874 scb_or_sram_attributes:
875 /* NULL definition is okay */
876 | modes
877 | scb_or_sram_reg_list
878 | modes scb_or_sram_reg_list
879 ;
880
881 scb_or_sram_reg_list:
882 reg_definition
883 | scb_or_sram_reg_list reg_definition
884 ;
885
886 reg_symbol:
887 T_SYMBOL
888 {
889 process_register(&$1);
890 $$.symbol = $1;
891 $$.offset = 0;
892 }
893 | T_SYMBOL '[' T_SYMBOL ']'
894 {
895 process_register(&$1);
896 if ($3->type != CONST) {
897 stop("register offset must be a constant", EX_DATAERR);
898 /* NOTREACHED */
899 }
900 if (($3->info.cinfo->value + 1) > $1->info.rinfo->size) {
901 stop("Accessing offset beyond range of register",
902 EX_DATAERR);
903 /* NOTREACHED */
904 }
905 $$.symbol = $1;
906 $$.offset = $3->info.cinfo->value;
907 }
908 | T_SYMBOL '[' T_NUMBER ']'
909 {
910 process_register(&$1);
911 if (($3 + 1) > $1->info.rinfo->size) {
912 stop("Accessing offset beyond range of register",
913 EX_DATAERR);
914 /* NOTREACHED */
915 }
916 $$.symbol = $1;
917 $$.offset = $3;
918 }
919 | T_A
920 {
921 if (accumulator.symbol == NULL) {
922 stop("No accumulator has been defined", EX_DATAERR);
923 /* NOTREACHED */
924 }
925 $$.symbol = accumulator.symbol;
926 $$.offset = 0;
927 }
928 ;
929
930 destination:
931 reg_symbol
932 {
933 test_writable_symbol($1.symbol);
934 $$ = $1;
935 }
936 ;
937
938 immediate:
939 expression
940 { $$ = $1; }
941 ;
942
943 immediate_or_a:
944 expression
945 {
946 if ($1.value == 0 && is_download_const(&$1) == 0) {
947 snprintf(errbuf, sizeof(errbuf),
948 "\nExpression evaluates to 0 and thus "
949 "references the accumulator.\n "
950 "If this is the desired effect, use 'A' "
951 "instead.\n");
952 stop(errbuf, EX_DATAERR);
953 }
954 $$ = $1;
955 }
956 | T_A
957 {
958 SLIST_INIT(&$$.referenced_syms);
959 symlist_add(&$$.referenced_syms, accumulator.symbol,
960 SYMLIST_INSERT_HEAD);
961 $$.value = 0;
962 }
963 ;
964
965 source:
966 reg_symbol
967 {
968 test_readable_symbol($1.symbol);
969 $$ = $1;
970 }
971 ;
972
973 opt_source:
974 {
975 $$.symbol = NULL;
976 $$.offset = 0;
977 }
978 | ',' source
979 { $$ = $2; }
980 ;
981
982 ret:
983 { $$ = 0; }
984 | T_RET
985 { $$ = 1; }
986 ;
987
988 set_src_mode:
989 T_SET_SRC_MODE T_NUMBER ';'
990 {
991 src_mode = $2;
992 }
993 ;
994
995 set_dst_mode:
996 T_SET_DST_MODE T_NUMBER ';'
997 {
998 dst_mode = $2;
999 }
1000 ;
1001
1002 critical_section_start:
1003 T_BEGIN_CS ';'
1004 {
1005 critical_section_t *cs;
1006
1007 if (in_critical_section != FALSE) {
1008 stop("Critical Section within Critical Section",
1009 EX_DATAERR);
1010 /* NOTREACHED */
1011 }
1012 cs = cs_alloc();
1013 cs->begin_addr = instruction_ptr;
1014 in_critical_section = TRUE;
1015 }
1016 ;
1017
1018 critical_section_end:
1019 T_END_CS ';'
1020 {
1021 critical_section_t *cs;
1022
1023 if (in_critical_section == FALSE) {
1024 stop("Unballanced 'end_cs'", EX_DATAERR);
1025 /* NOTREACHED */
1026 }
1027 cs = TAILQ_LAST(&cs_tailq, cs_tailq);
1028 cs->end_addr = instruction_ptr;
1029 in_critical_section = FALSE;
1030 }
1031 ;
1032
1033 export:
1034 { $$ = 0; }
1035 | T_EXPORT
1036 { $$ = 1; }
1037 ;
1038
1039 label:
1040 export T_SYMBOL ':'
1041 {
1042 if ($2->type != UNINITIALIZED) {
1043 stop("Program label multiply defined", EX_DATAERR);
1044 /* NOTREACHED */
1045 }
1046 $2->type = LABEL;
1047 initialize_symbol($2);
1048 $2->info.linfo->address = instruction_ptr;
1049 $2->info.linfo->exported = $1;
1050 }
1051 ;
1052
1053 address:
1054 T_SYMBOL
1055 {
1056 $$.symbol = $1;
1057 $$.offset = 0;
1058 }
1059 | T_SYMBOL '+' T_NUMBER
1060 {
1061 $$.symbol = $1;
1062 $$.offset = $3;
1063 }
1064 | T_SYMBOL '-' T_NUMBER
1065 {
1066 $$.symbol = $1;
1067 $$.offset = -$3;
1068 }
1069 | '.'
1070 {
1071 $$.symbol = NULL;
1072 $$.offset = 0;
1073 }
1074 | '.' '+' T_NUMBER
1075 {
1076 $$.symbol = NULL;
1077 $$.offset = $3;
1078 }
1079 | '.' '-' T_NUMBER
1080 {
1081 $$.symbol = NULL;
1082 $$.offset = -$3;
1083 }
1084 ;
1085
1086 conditional:
1087 T_IF T_CEXPR '{'
1088 {
1089 scope_t *new_scope;
1090
1091 add_conditional($2);
1092 new_scope = scope_alloc();
1093 new_scope->type = SCOPE_IF;
1094 new_scope->begin_addr = instruction_ptr;
1095 new_scope->func_num = $2->info.condinfo->func_num;
1096 }
1097 | T_ELSE T_IF T_CEXPR '{'
1098 {
1099 scope_t *new_scope;
1100 scope_t *scope_context;
1101 scope_t *last_scope;
1102
1103 /*
1104 * Ensure that the previous scope is either an
1105 * if or and else if.
1106 */
1107 scope_context = SLIST_FIRST(&scope_stack);
1108 last_scope = TAILQ_LAST(&scope_context->inner_scope,
1109 scope_tailq);
1110 if (last_scope == NULL
1111 || last_scope->type == T_ELSE) {
1112
1113 stop("'else if' without leading 'if'", EX_DATAERR);
1114 /* NOTREACHED */
1115 }
1116 add_conditional($3);
1117 new_scope = scope_alloc();
1118 new_scope->type = SCOPE_ELSE_IF;
1119 new_scope->begin_addr = instruction_ptr;
1120 new_scope->func_num = $3->info.condinfo->func_num;
1121 }
1122 | T_ELSE '{'
1123 {
1124 scope_t *new_scope;
1125 scope_t *scope_context;
1126 scope_t *last_scope;
1127
1128 /*
1129 * Ensure that the previous scope is either an
1130 * if or and else if.
1131 */
1132 scope_context = SLIST_FIRST(&scope_stack);
1133 last_scope = TAILQ_LAST(&scope_context->inner_scope,
1134 scope_tailq);
1135 if (last_scope == NULL
1136 || last_scope->type == SCOPE_ELSE) {
1137
1138 stop("'else' without leading 'if'", EX_DATAERR);
1139 /* NOTREACHED */
1140 }
1141 new_scope = scope_alloc();
1142 new_scope->type = SCOPE_ELSE;
1143 new_scope->begin_addr = instruction_ptr;
1144 }
1145 ;
1146
1147 conditional:
1148 '}'
1149 {
1150 scope_t *scope_context;
1151
1152 scope_context = SLIST_FIRST(&scope_stack);
1153 if (scope_context->type == SCOPE_ROOT) {
1154 stop("Unexpected '}' encountered", EX_DATAERR);
1155 /* NOTREACHED */
1156 }
1157
1158 scope_context->end_addr = instruction_ptr;
1159
1160 /* Pop the scope */
1161 SLIST_REMOVE_HEAD(&scope_stack, scope_stack_links);
1162
1163 process_scope(scope_context);
1164
1165 if (SLIST_FIRST(&scope_stack) == NULL) {
1166 stop("Unexpected '}' encountered", EX_DATAERR);
1167 /* NOTREACHED */
1168 }
1169 }
1170 ;
1171
1172 f1_opcode:
1173 T_AND { $$ = AIC_OP_AND; }
1174 | T_XOR { $$ = AIC_OP_XOR; }
1175 | T_ADD { $$ = AIC_OP_ADD; }
1176 | T_ADC { $$ = AIC_OP_ADC; }
1177 ;
1178
1179 code:
1180 f1_opcode destination ',' immediate_or_a opt_source ret ';'
1181 {
1182 format_1_instr($1, &$2, &$4, &$5, $6);
1183 }
1184 ;
1185
1186 code:
1187 T_OR reg_symbol ',' immediate_or_a opt_source ret ';'
1188 {
1189 format_1_instr(AIC_OP_OR, &$2, &$4, &$5, $6);
1190 }
1191 ;
1192
1193 code:
1194 T_INC destination opt_source ret ';'
1195 {
1196 expression_t immed;
1197
1198 make_expression(&immed, 1);
1199 format_1_instr(AIC_OP_ADD, &$2, &immed, &$3, $4);
1200 }
1201 ;
1202
1203 code:
1204 T_DEC destination opt_source ret ';'
1205 {
1206 expression_t immed;
1207
1208 make_expression(&immed, -1);
1209 format_1_instr(AIC_OP_ADD, &$2, &immed, &$3, $4);
1210 }
1211 ;
1212
1213 code:
1214 T_CLC ret ';'
1215 {
1216 expression_t immed;
1217
1218 make_expression(&immed, -1);
1219 format_1_instr(AIC_OP_ADD, &none, &immed, &allzeros, $2);
1220 }
1221 | T_CLC T_MVI destination ',' immediate_or_a ret ';'
1222 {
1223 format_1_instr(AIC_OP_ADD, &$3, &$5, &allzeros, $6);
1224 }
1225 ;
1226
1227 code:
1228 T_STC ret ';'
1229 {
1230 expression_t immed;
1231
1232 make_expression(&immed, 1);
1233 format_1_instr(AIC_OP_ADD, &none, &immed, &allones, $2);
1234 }
1235 | T_STC destination ret ';'
1236 {
1237 expression_t immed;
1238
1239 make_expression(&immed, 1);
1240 format_1_instr(AIC_OP_ADD, &$2, &immed, &allones, $3);
1241 }
1242 ;
1243
1244 code:
1245 T_BMOV destination ',' source ',' immediate ret ';'
1246 {
1247 format_1_instr(AIC_OP_BMOV, &$2, &$6, &$4, $7);
1248 }
1249 ;
1250
1251 code:
1252 T_MOV destination ',' source ret ';'
1253 {
1254 expression_t immed;
1255
1256 make_expression(&immed, 1);
1257 format_1_instr(AIC_OP_BMOV, &$2, &immed, &$4, $5);
1258 }
1259 ;
1260
1261 code:
1262 T_MVI destination ',' immediate ret ';'
1263 {
1264 if ($4.value == 0
1265 && is_download_const(&$4) == 0) {
1266 expression_t immed;
1267
1268 /*
1269 * Allow move immediates of 0 so that macros,
1270 * that can't know the immediate's value and
1271 * otherwise compensate, still work.
1272 */
1273 make_expression(&immed, 1);
1274 format_1_instr(AIC_OP_BMOV, &$2, &immed, &allzeros, $5);
1275 } else {
1276 format_1_instr(AIC_OP_OR, &$2, &$4, &allzeros, $5);
1277 }
1278 }
1279 ;
1280
1281 code:
1282 T_NOT destination opt_source ret ';'
1283 {
1284 expression_t immed;
1285
1286 make_expression(&immed, 0xff);
1287 format_1_instr(AIC_OP_XOR, &$2, &immed, &$3, $4);
1288 }
1289 ;
1290
1291 code:
1292 T_CLR destination ret ';'
1293 {
1294 expression_t immed;
1295
1296 make_expression(&immed, 0xff);
1297 format_1_instr(AIC_OP_AND, &$2, &immed, &allzeros, $3);
1298 }
1299 ;
1300
1301 code:
1302 T_NOP ret ';'
1303 {
1304 expression_t immed;
1305
1306 make_expression(&immed, 0xff);
1307 format_1_instr(AIC_OP_AND, &none, &immed, &allzeros, $2);
1308 }
1309 ;
1310
1311 code:
1312 T_RET ';'
1313 {
1314 expression_t immed;
1315
1316 make_expression(&immed, 0xff);
1317 format_1_instr(AIC_OP_AND, &none, &immed, &allzeros, TRUE);
1318 }
1319 ;
1320
1321 /*
1322 * This grammar differs from the one in the aic7xxx
1323 * reference manual since the grammar listed there is
1324 * ambiguous and causes a shift/reduce conflict.
1325 * It also seems more logical as the "immediate"
1326 * argument is listed as the second arg like the
1327 * other formats.
1328 */
1329
1330 f2_opcode:
1331 T_SHL { $$ = AIC_OP_SHL; }
1332 | T_SHR { $$ = AIC_OP_SHR; }
1333 | T_ROL { $$ = AIC_OP_ROL; }
1334 | T_ROR { $$ = AIC_OP_ROR; }
1335 ;
1336
1337 /*
1338 * 16bit opcodes, not used
1339 *
1340 *f4_opcode:
1341 * T_OR16 { $$ = AIC_OP_OR16; }
1342 *| T_AND16 { $$ = AIC_OP_AND16; }
1343 *| T_XOR16 { $$ = AIC_OP_XOR16; }
1344 *| T_ADD16 { $$ = AIC_OP_ADD16; }
1345 *| T_ADC16 { $$ = AIC_OP_ADC16; }
1346 *| T_MVI16 { $$ = AIC_OP_MVI16; }
1347 *;
1348 */
1349
1350 code:
1351 f2_opcode destination ',' expression opt_source ret ';'
1352 {
1353 format_2_instr($1, &$2, &$4, &$5, $6);
1354 }
1355 ;
1356
1357 jmp_jc_jnc_call:
1358 T_JMP { $$ = AIC_OP_JMP; }
1359 | T_JC { $$ = AIC_OP_JC; }
1360 | T_JNC { $$ = AIC_OP_JNC; }
1361 | T_CALL { $$ = AIC_OP_CALL; }
1362 ;
1363
1364 jz_jnz:
1365 T_JZ { $$ = AIC_OP_JZ; }
1366 | T_JNZ { $$ = AIC_OP_JNZ; }
1367 ;
1368
1369 je_jne:
1370 T_JE { $$ = AIC_OP_JE; }
1371 | T_JNE { $$ = AIC_OP_JNE; }
1372 ;
1373
1374 code:
1375 jmp_jc_jnc_call address ';'
1376 {
1377 expression_t immed;
1378
1379 make_expression(&immed, 0);
1380 format_3_instr($1, &sindex, &immed, &$2);
1381 }
1382 ;
1383
1384 code:
1385 T_OR reg_symbol ',' immediate jmp_jc_jnc_call address ';'
1386 {
1387 type_check(&$2, &$4, AIC_OP_OR);
1388 format_3_instr($5, &$2, &$4, &$6);
1389 }
1390 ;
1391
1392 code:
1393 T_TEST source ',' immediate_or_a jz_jnz address ';'
1394 {
1395 format_3_instr($5, &$2, &$4, &$6);
1396 }
1397 ;
1398
1399 code:
1400 T_CMP source ',' immediate_or_a je_jne address ';'
1401 {
1402 format_3_instr($5, &$2, &$4, &$6);
1403 }
1404 ;
1405
1406 code:
1407 T_MOV source jmp_jc_jnc_call address ';'
1408 {
1409 expression_t immed;
1410
1411 make_expression(&immed, 0);
1412 format_3_instr($3, &$2, &immed, &$4);
1413 }
1414 ;
1415
1416 code:
1417 T_MVI immediate jmp_jc_jnc_call address ';'
1418 {
1419 format_3_instr($3, &allzeros, &$2, &$4);
1420 }
1421 ;
1422
1423 %%
1424
1425 static void
1426 process_field(int field_type, symbol_t *sym, int value)
1427 {
1428 /*
1429 * Add the current register to its
1430 * symbol list, if it already exists,
1431 * warn if we are setting it to a
1432 * different value, or in the bit to
1433 * the "allowed bits" of this register.
1434 */
1435 if (sym->type == UNINITIALIZED) {
1436 sym->type = field_type;
1437 initialize_symbol(sym);
1438 sym->info.finfo->value = value;
1439 if (field_type != ENUM_ENTRY) {
1440 if (field_type != MASK && value == 0) {
1441 stop("Empty Field, or Enum", EX_DATAERR);
1442 /* NOTREACHED */
1443 }
1444 sym->info.finfo->value = value;
1445 sym->info.finfo->mask = value;
1446 } else if (field_symbol != NULL) {
1447 sym->info.finfo->mask = field_symbol->info.finfo->value;
1448 } else {
1449 sym->info.finfo->mask = 0xFF;
1450 }
1451 } else if (sym->type != field_type) {
1452 stop("Field definition mirrors a definition of the same "
1453 " name, but a different type", EX_DATAERR);
1454 /* NOTREACHED */
1455 } else if (value != sym->info.finfo->value) {
1456 stop("Field redefined with a conflicting value", EX_DATAERR);
1457 /* NOTREACHED */
1458 }
1459 /* Fail if this symbol is already listed */
1460 if (symlist_search(&(sym->info.finfo->symrefs),
1461 cur_symbol->name) != NULL) {
1462 stop("Field defined multiple times for register", EX_DATAERR);
1463 /* NOTREACHED */
1464 }
1465 symlist_add(&(sym->info.finfo->symrefs), cur_symbol,
1466 SYMLIST_INSERT_HEAD);
1467 cur_symbol->info.rinfo->valid_bitmask |= sym->info.finfo->mask;
1468 cur_symbol->info.rinfo->typecheck_masks = TRUE;
1469 symlist_add(&(cur_symbol->info.rinfo->fields), sym, SYMLIST_SORT);
1470 }
1471
1472 static void
initialize_symbol(symbol_t * symbol)1473 initialize_symbol(symbol_t *symbol)
1474 {
1475 switch (symbol->type) {
1476 case UNINITIALIZED:
1477 stop("Call to initialize_symbol with type field unset",
1478 EX_SOFTWARE);
1479 /* NOTREACHED */
1480 break;
1481 case REGISTER:
1482 case SRAMLOC:
1483 case SCBLOC:
1484 symbol->info.rinfo =
1485 (struct reg_info *)malloc(sizeof(struct reg_info));
1486 if (symbol->info.rinfo == NULL) {
1487 stop("Can't create register info", EX_SOFTWARE);
1488 /* NOTREACHED */
1489 }
1490 memset(symbol->info.rinfo, 0,
1491 sizeof(struct reg_info));
1492 SLIST_INIT(&(symbol->info.rinfo->fields));
1493 /*
1494 * Default to allowing access in all register modes
1495 * or to the mode specified by the SCB or SRAM space
1496 * we are in.
1497 */
1498 if (scb_or_sram_symbol != NULL)
1499 symbol->info.rinfo->modes =
1500 scb_or_sram_symbol->info.rinfo->modes;
1501 else
1502 symbol->info.rinfo->modes = ~0;
1503 break;
1504 case ALIAS:
1505 symbol->info.ainfo =
1506 (struct alias_info *)malloc(sizeof(struct alias_info));
1507 if (symbol->info.ainfo == NULL) {
1508 stop("Can't create alias info", EX_SOFTWARE);
1509 /* NOTREACHED */
1510 }
1511 memset(symbol->info.ainfo, 0,
1512 sizeof(struct alias_info));
1513 break;
1514 case MASK:
1515 case FIELD:
1516 case ENUM:
1517 case ENUM_ENTRY:
1518 symbol->info.finfo =
1519 (struct field_info *)malloc(sizeof(struct field_info));
1520 if (symbol->info.finfo == NULL) {
1521 stop("Can't create field info", EX_SOFTWARE);
1522 /* NOTREACHED */
1523 }
1524 memset(symbol->info.finfo, 0, sizeof(struct field_info));
1525 SLIST_INIT(&(symbol->info.finfo->symrefs));
1526 break;
1527 case CONST:
1528 case DOWNLOAD_CONST:
1529 symbol->info.cinfo =
1530 (struct const_info *)malloc(sizeof(struct const_info));
1531 if (symbol->info.cinfo == NULL) {
1532 stop("Can't create alias info", EX_SOFTWARE);
1533 /* NOTREACHED */
1534 }
1535 memset(symbol->info.cinfo, 0,
1536 sizeof(struct const_info));
1537 break;
1538 case LABEL:
1539 symbol->info.linfo =
1540 (struct label_info *)malloc(sizeof(struct label_info));
1541 if (symbol->info.linfo == NULL) {
1542 stop("Can't create label info", EX_SOFTWARE);
1543 /* NOTREACHED */
1544 }
1545 memset(symbol->info.linfo, 0,
1546 sizeof(struct label_info));
1547 break;
1548 case CONDITIONAL:
1549 symbol->info.condinfo =
1550 (struct cond_info *)malloc(sizeof(struct cond_info));
1551 if (symbol->info.condinfo == NULL) {
1552 stop("Can't create conditional info", EX_SOFTWARE);
1553 /* NOTREACHED */
1554 }
1555 memset(symbol->info.condinfo, 0,
1556 sizeof(struct cond_info));
1557 break;
1558 case MACRO:
1559 symbol->info.macroinfo =
1560 (struct macro_info *)malloc(sizeof(struct macro_info));
1561 if (symbol->info.macroinfo == NULL) {
1562 stop("Can't create macro info", EX_SOFTWARE);
1563 /* NOTREACHED */
1564 }
1565 memset(symbol->info.macroinfo, 0,
1566 sizeof(struct macro_info));
1567 STAILQ_INIT(&symbol->info.macroinfo->args);
1568 break;
1569 default:
1570 stop("Call to initialize_symbol with invalid symbol type",
1571 EX_SOFTWARE);
1572 /* NOTREACHED */
1573 break;
1574 }
1575 }
1576
1577 static void
add_macro_arg(const char * argtext,int argnum)1578 add_macro_arg(const char *argtext, int argnum)
1579 {
1580 struct macro_arg *marg;
1581 int i;
1582 int retval;
1583
1584 if (cur_symbol == NULL || cur_symbol->type != MACRO) {
1585 stop("Invalid current symbol for adding macro arg",
1586 EX_SOFTWARE);
1587 /* NOTREACHED */
1588 }
1589
1590 marg = (struct macro_arg *)malloc(sizeof(*marg));
1591 if (marg == NULL) {
1592 stop("Can't create macro_arg structure", EX_SOFTWARE);
1593 /* NOTREACHED */
1594 }
1595 marg->replacement_text = NULL;
1596 retval = snprintf(regex_pattern, sizeof(regex_pattern),
1597 "[^-/A-Za-z0-9_](%s)([^-/A-Za-z0-9_]|$)",
1598 argtext);
1599 if (retval >= sizeof(regex_pattern)) {
1600 stop("Regex text buffer too small for arg",
1601 EX_SOFTWARE);
1602 /* NOTREACHED */
1603 }
1604 retval = regcomp(&marg->arg_regex, regex_pattern, REG_EXTENDED);
1605 if (retval != 0) {
1606 stop("Regex compilation failed", EX_SOFTWARE);
1607 /* NOTREACHED */
1608 }
1609 STAILQ_INSERT_TAIL(&cur_symbol->info.macroinfo->args, marg, links);
1610 }
1611
1612 static void
add_macro_body(const char * bodytext)1613 add_macro_body(const char *bodytext)
1614 {
1615 if (cur_symbol == NULL || cur_symbol->type != MACRO) {
1616 stop("Invalid current symbol for adding macro arg",
1617 EX_SOFTWARE);
1618 /* NOTREACHED */
1619 }
1620 cur_symbol->info.macroinfo->body = strdup(bodytext);
1621 if (cur_symbol->info.macroinfo->body == NULL) {
1622 stop("Can't duplicate macro body text", EX_SOFTWARE);
1623 /* NOTREACHED */
1624 }
1625 }
1626
1627 static void
process_register(symbol_t ** p_symbol)1628 process_register(symbol_t **p_symbol)
1629 {
1630 symbol_t *symbol = *p_symbol;
1631
1632 if (symbol->type == UNINITIALIZED) {
1633 snprintf(errbuf, sizeof(errbuf), "Undefined register %s",
1634 symbol->name);
1635 stop(errbuf, EX_DATAERR);
1636 /* NOTREACHED */
1637 } else if (symbol->type == ALIAS) {
1638 *p_symbol = symbol->info.ainfo->parent;
1639 } else if ((symbol->type != REGISTER)
1640 && (symbol->type != SCBLOC)
1641 && (symbol->type != SRAMLOC)) {
1642 snprintf(errbuf, sizeof(errbuf),
1643 "Specified symbol %s is not a register",
1644 symbol->name);
1645 stop(errbuf, EX_DATAERR);
1646 }
1647 }
1648
1649 static void
format_1_instr(int opcode,symbol_ref_t * dest,expression_t * immed,symbol_ref_t * src,int ret)1650 format_1_instr(int opcode, symbol_ref_t *dest, expression_t *immed,
1651 symbol_ref_t *src, int ret)
1652 {
1653 struct instruction *instr;
1654 struct ins_format1 *f1_instr;
1655
1656 if (src->symbol == NULL)
1657 src = dest;
1658
1659 /* Test register permissions */
1660 test_writable_symbol(dest->symbol);
1661 test_readable_symbol(src->symbol);
1662
1663 if (!is_location_address(dest->symbol)) {
1664 /* Ensure that immediate makes sense for this destination */
1665 type_check(dest, immed, opcode);
1666 }
1667
1668 /* Allocate sequencer space for the instruction and fill it out */
1669 instr = seq_alloc();
1670 f1_instr = &instr->format.format1;
1671 f1_instr->ret = ret ? 1 : 0;
1672 f1_instr->opcode = opcode;
1673 f1_instr->destination = dest->symbol->info.rinfo->address
1674 + dest->offset;
1675 f1_instr->source = src->symbol->info.rinfo->address
1676 + src->offset;
1677 f1_instr->immediate = immed->value;
1678
1679 if (is_download_const(immed))
1680 f1_instr->parity = 1;
1681 else if (dest->symbol == mode_ptr.symbol) {
1682 u_int src_value;
1683 u_int dst_value;
1684
1685 /*
1686 * Attempt to update mode information if
1687 * we are operating on the mode register.
1688 */
1689 if (src->symbol == allones.symbol)
1690 src_value = 0xFF;
1691 else if (src->symbol == allzeros.symbol)
1692 src_value = 0;
1693 else if (src->symbol == mode_ptr.symbol)
1694 src_value = (dst_mode << 4) | src_mode;
1695 else
1696 goto cant_update;
1697
1698 switch (opcode) {
1699 case AIC_OP_AND:
1700 dst_value = src_value & immed->value;
1701 break;
1702 case AIC_OP_XOR:
1703 dst_value = src_value ^ immed->value;
1704 break;
1705 case AIC_OP_ADD:
1706 dst_value = (src_value + immed->value) & 0xFF;
1707 break;
1708 case AIC_OP_OR:
1709 dst_value = src_value | immed->value;
1710 break;
1711 case AIC_OP_BMOV:
1712 dst_value = src_value;
1713 break;
1714 default:
1715 goto cant_update;
1716 }
1717 src_mode = dst_value & 0xF;
1718 dst_mode = (dst_value >> 4) & 0xF;
1719 }
1720
1721 cant_update:
1722 symlist_free(&immed->referenced_syms);
1723 instruction_ptr++;
1724 }
1725
1726 static void
format_2_instr(int opcode,symbol_ref_t * dest,expression_t * places,symbol_ref_t * src,int ret)1727 format_2_instr(int opcode, symbol_ref_t *dest, expression_t *places,
1728 symbol_ref_t *src, int ret)
1729 {
1730 struct instruction *instr;
1731 struct ins_format2 *f2_instr;
1732 uint8_t shift_control;
1733
1734 if (src->symbol == NULL)
1735 src = dest;
1736
1737 /* Test register permissions */
1738 test_writable_symbol(dest->symbol);
1739 test_readable_symbol(src->symbol);
1740
1741 /* Allocate sequencer space for the instruction and fill it out */
1742 instr = seq_alloc();
1743 f2_instr = &instr->format.format2;
1744 f2_instr->ret = ret ? 1 : 0;
1745 f2_instr->opcode = AIC_OP_ROL;
1746 f2_instr->destination = dest->symbol->info.rinfo->address
1747 + dest->offset;
1748 f2_instr->source = src->symbol->info.rinfo->address
1749 + src->offset;
1750 if (places->value > 8 || places->value <= 0) {
1751 stop("illegal shift value", EX_DATAERR);
1752 /* NOTREACHED */
1753 }
1754 switch (opcode) {
1755 case AIC_OP_SHL:
1756 if (places->value == 8)
1757 shift_control = 0xf0;
1758 else
1759 shift_control = (places->value << 4) | places->value;
1760 break;
1761 case AIC_OP_SHR:
1762 if (places->value == 8) {
1763 shift_control = 0xf8;
1764 } else {
1765 shift_control = (places->value << 4)
1766 | (8 - places->value)
1767 | 0x08;
1768 }
1769 break;
1770 case AIC_OP_ROL:
1771 shift_control = places->value & 0x7;
1772 break;
1773 case AIC_OP_ROR:
1774 shift_control = (8 - places->value) | 0x08;
1775 break;
1776 default:
1777 shift_control = 0; /* Quiet Compiler */
1778 stop("Invalid shift operation specified", EX_SOFTWARE);
1779 /* NOTREACHED */
1780 break;
1781 };
1782 f2_instr->shift_control = shift_control;
1783 symlist_free(&places->referenced_syms);
1784 instruction_ptr++;
1785 }
1786
1787 static void
format_3_instr(int opcode,symbol_ref_t * src,expression_t * immed,symbol_ref_t * address)1788 format_3_instr(int opcode, symbol_ref_t *src,
1789 expression_t *immed, symbol_ref_t *address)
1790 {
1791 struct instruction *instr;
1792 struct ins_format3 *f3_instr;
1793 int addr;
1794
1795 /* Test register permissions */
1796 test_readable_symbol(src->symbol);
1797
1798 /* Allocate sequencer space for the instruction and fill it out */
1799 instr = seq_alloc();
1800 f3_instr = &instr->format.format3;
1801 if (address->symbol == NULL) {
1802 /* 'dot' reference. Use the current instruction pointer */
1803 addr = instruction_ptr + address->offset;
1804 } else if (address->symbol->type == UNINITIALIZED) {
1805 /* forward reference */
1806 addr = address->offset;
1807 instr->patch_label = address->symbol;
1808 } else
1809 addr = address->symbol->info.linfo->address + address->offset;
1810 f3_instr->opcode = opcode;
1811 f3_instr->address = addr;
1812 f3_instr->source = src->symbol->info.rinfo->address
1813 + src->offset;
1814 f3_instr->immediate = immed->value;
1815
1816 if (is_download_const(immed))
1817 f3_instr->parity = 1;
1818
1819 symlist_free(&immed->referenced_syms);
1820 instruction_ptr++;
1821 }
1822
1823 static void
test_readable_symbol(symbol_t * symbol)1824 test_readable_symbol(symbol_t *symbol)
1825 {
1826 if ((symbol->info.rinfo->modes & (0x1 << src_mode)) == 0) {
1827 snprintf(errbuf, sizeof(errbuf),
1828 "Register %s unavailable in source reg mode %d",
1829 symbol->name, src_mode);
1830 stop(errbuf, EX_DATAERR);
1831 }
1832
1833 if (symbol->info.rinfo->mode == WO) {
1834 stop("Write Only register specified as source",
1835 EX_DATAERR);
1836 /* NOTREACHED */
1837 }
1838 }
1839
1840 static void
test_writable_symbol(symbol_t * symbol)1841 test_writable_symbol(symbol_t *symbol)
1842 {
1843 if ((symbol->info.rinfo->modes & (0x1 << dst_mode)) == 0) {
1844 snprintf(errbuf, sizeof(errbuf),
1845 "Register %s unavailable in destination reg mode %d",
1846 symbol->name, dst_mode);
1847 stop(errbuf, EX_DATAERR);
1848 }
1849
1850 if (symbol->info.rinfo->mode == RO) {
1851 stop("Read Only register specified as destination",
1852 EX_DATAERR);
1853 /* NOTREACHED */
1854 }
1855 }
1856
1857 static void
type_check(symbol_ref_t * sym,expression_t * expression,int opcode)1858 type_check(symbol_ref_t *sym, expression_t *expression, int opcode)
1859 {
1860 symbol_t *symbol = sym->symbol;
1861 symbol_node_t *node;
1862 int and_op;
1863 int8_t value, mask;
1864
1865 and_op = FALSE;
1866 /*
1867 * Make sure that we aren't attempting to write something
1868 * that hasn't been defined. If this is an and operation,
1869 * this is a mask, so "undefined" bits are okay.
1870 */
1871 if (opcode == AIC_OP_AND || opcode == AIC_OP_JNZ ||
1872 opcode == AIC_OP_JZ || opcode == AIC_OP_JNE ||
1873 opcode == AIC_OP_BMOV)
1874 and_op = TRUE;
1875
1876 /*
1877 * Defaulting to 8 bit logic
1878 */
1879 mask = (int8_t)~symbol->info.rinfo->valid_bitmask;
1880 value = (int8_t)expression->value;
1881
1882 if (and_op == FALSE && (mask & value) != 0 ) {
1883 snprintf(errbuf, sizeof(errbuf),
1884 "Invalid bit(s) 0x%x in immediate written to %s",
1885 (mask & value),
1886 symbol->name);
1887 stop(errbuf, EX_DATAERR);
1888 /* NOTREACHED */
1889 }
1890
1891 /*
1892 * Now make sure that all of the symbols referenced by the
1893 * expression are defined for this register.
1894 */
1895 if (symbol->info.rinfo->typecheck_masks != FALSE) {
1896 for(node = expression->referenced_syms.slh_first;
1897 node != NULL;
1898 node = node->links.sle_next) {
1899 if ((node->symbol->type == MASK
1900 || node->symbol->type == FIELD
1901 || node->symbol->type == ENUM
1902 || node->symbol->type == ENUM_ENTRY)
1903 && symlist_search(&node->symbol->info.finfo->symrefs,
1904 symbol->name) == NULL) {
1905 snprintf(errbuf, sizeof(errbuf),
1906 "Invalid field or mask %s "
1907 "for register %s",
1908 node->symbol->name, symbol->name);
1909 stop(errbuf, EX_DATAERR);
1910 /* NOTREACHED */
1911 }
1912 }
1913 }
1914 }
1915
1916 static void
make_expression(expression_t * immed,int value)1917 make_expression(expression_t *immed, int value)
1918 {
1919 SLIST_INIT(&immed->referenced_syms);
1920 immed->value = value & 0xff;
1921 }
1922
1923 static void
add_conditional(symbol_t * symbol)1924 add_conditional(symbol_t *symbol)
1925 {
1926 static int numfuncs;
1927
1928 if (numfuncs == 0) {
1929 /* add a special conditional, "0" */
1930 symbol_t *false_func;
1931
1932 false_func = symtable_get("0");
1933 if (false_func->type != UNINITIALIZED) {
1934 stop("Conditional expression '0' "
1935 "conflicts with a symbol", EX_DATAERR);
1936 /* NOTREACHED */
1937 }
1938 false_func->type = CONDITIONAL;
1939 initialize_symbol(false_func);
1940 false_func->info.condinfo->func_num = numfuncs++;
1941 symlist_add(&patch_functions, false_func, SYMLIST_INSERT_HEAD);
1942 }
1943
1944 /* This condition has occurred before */
1945 if (symbol->type == CONDITIONAL)
1946 return;
1947
1948 if (symbol->type != UNINITIALIZED) {
1949 stop("Conditional expression conflicts with a symbol",
1950 EX_DATAERR);
1951 /* NOTREACHED */
1952 }
1953
1954 symbol->type = CONDITIONAL;
1955 initialize_symbol(symbol);
1956 symbol->info.condinfo->func_num = numfuncs++;
1957 symlist_add(&patch_functions, symbol, SYMLIST_INSERT_HEAD);
1958 }
1959
1960 static void
add_version(const char * verstring)1961 add_version(const char *verstring)
1962 {
1963 const char prefix[] = " * ";
1964 int newlen;
1965 int oldlen;
1966
1967 newlen = strlen(verstring) + strlen(prefix);
1968 oldlen = 0;
1969 if (versions != NULL)
1970 oldlen = strlen(versions);
1971 versions = realloc(versions, newlen + oldlen + 2);
1972 if (versions == NULL)
1973 stop("Can't allocate version string", EX_SOFTWARE);
1974 strcpy(&versions[oldlen], prefix);
1975 strcpy(&versions[oldlen + strlen(prefix)], verstring);
1976 versions[newlen + oldlen] = '\n';
1977 versions[newlen + oldlen + 1] = '\0';
1978 }
1979
1980 void
yyerror(const char * string)1981 yyerror(const char *string)
1982 {
1983 stop(string, EX_DATAERR);
1984 }
1985
1986 static int
is_download_const(expression_t * immed)1987 is_download_const(expression_t *immed)
1988 {
1989 if ((immed->referenced_syms.slh_first != NULL)
1990 && (immed->referenced_syms.slh_first->symbol->type == DOWNLOAD_CONST))
1991 return (TRUE);
1992
1993 return (FALSE);
1994 }
1995
1996 static int
is_location_address(symbol_t * sym)1997 is_location_address(symbol_t *sym)
1998 {
1999 if (sym->type == SCBLOC ||
2000 sym->type == SRAMLOC)
2001 return (TRUE);
2002 return (FALSE);
2003 }
2004
2005