1 /* Paul's XA51 Assembler, Copyright 1997,2002 Paul Stoffregen (paul@pjrc.com)
3 * Paul's XA51 Assembler is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; version 2.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 /* adapted from the osu8asm project, 1995 */
18 /* http://www.pjrc.com/tech/osu8/index.html */
21 made "relocatable" by johan.knol@iduna.nl for sdcc
23 This isn't a standalone assembler anymore. It's only purpose is to
24 create relocatable modules (that has to be processed with xa_link)
25 out of sdcc-generated .xa files
35 #define printf(x...) fprintf(stderr,x)
38 #include "xa_version.h"
39 extern void yyrestart(FILE *new_file);
43 char modulename[PATH_MAX];
44 char infilename[PATH_MAX];
45 char outfilename[PATH_MAX];
46 char listfilename[PATH_MAX];
47 char symfilename[PATH_MAX];
49 /* global variables */
51 FILE *frel, *fmem, *list_fp, *sym_fp;
54 extern char last_line_text[];
55 struct symbol *sym_list=NULL;
56 struct target *targ_list=NULL;
59 int expr_result, expr_ok, jump_dest, inst;
61 char symbol_name[1000];
62 struct area_struct area[NUM_AREAS];
65 char rel_line[2][132];
67 char *areaToString (int area) {
70 case AREA_CSEG: return "CSEG";
71 case AREA_DSEG: return "DSEG";
72 //case AREA_OSEG: return "OSEG";
73 //case AREA_ISEG: return "ISEG";
74 case AREA_BSEG: return "BSEG";
75 case AREA_XSEG: return "XSEG";
76 case AREA_XISEG: return "XISEG";
77 case AREA_XINIT: return "XINIT";
78 case AREA_GSINIT: return "GSINIT";
79 case AREA_GSFINAL: return "GSFINAL";
80 case AREA_HOME: return "HOME";
81 case AREA_SSEG: return "SSEG";
86 /* "mem" is replaced by area[current_area].alloc_position */
87 /* int mem=0; */ /* mem is location in memory */
89 /* add symbols to list when we find their definition in pass #1 */
90 /* we will evaluate their values in pass #2, and figure out if */
91 /* they are branch targets betweem passes 1 and 2. Every symbol */
92 /* should appear exactly once in this list, since it can't be redefined */
94 struct symbol * build_sym_list(char *thename)
96 struct symbol *new, *p;
98 if ((p=findSymbol(thename))) {
100 //fprintf (stderr, "warning, symbol %s already defined\n", thename);
104 //printf(" Symbol: %s Line: %d\n", thename, lineno);
105 new = (struct symbol *) malloc(sizeof(struct symbol));
106 new->name = (char *) malloc(strlen(thename)+1);
107 strcpy(new->name, thename);
113 new->line_def = lineno - 1;
114 new->area = current_area;
115 new->mode = 'X'; // start with an external
117 if (sym_list == NULL) return (sym_list = new);
119 while (p->next != NULL) p = p->next;
124 struct symbol *findSymbol (char *thename) {
126 for (p=sym_list; p; p=p->next) {
127 if (strcasecmp(thename, p->name)==0) {
134 int assign_value(char *thename, int thevalue, char mode)
140 if (!(strcasecmp(thename, p->name))) {
148 fprintf(stderr, "Internal Error! Couldn't find symbol\n");
152 int mk_bit(char *thename, int area)
158 if (!(strcasecmp(thename, p->name))) {
165 fprintf(stderr, "Internal Error! Couldn't find symbol\n");
169 int mk_sfr(char *thename)
175 if (!(strcasecmp(thename, p->name))) {
182 fprintf(stderr, "Internal Error! Couldn't find symbol\n");
187 int mk_reg(char *thename)
193 if (!(strcasecmp(thename, p->name))) {
199 fprintf(stderr, "Internal Error! Couldn't find symbol\n");
203 int mk_global(char *thename)
209 if (!(strcasecmp(thename, p->name))) {
215 fprintf(stderr, "Internal Error! Couldn't find symbol\n");
219 int get_value(char *thename)
224 if (!(strcasecmp(thename, p->name))) {
231 fprintf(stderr, "Internal Error! Couldn't find symbol value\n");
237 /* add every branch target to this list as we find them */
238 /* ok if multiple entries of same symbol name in this list */
240 struct target * build_target_list(char *thename)
242 struct target *new, *p;
243 new = (struct target *) malloc(sizeof(struct target));
244 new->name = (char *) malloc(strlen(thename)+1);
245 strcpy(new->name, thename);
247 if (targ_list == NULL) return (targ_list = new);
249 while (p->next != NULL) p = p->next;
254 /* figure out which symbols are branch targets */
258 struct symbol *p_sym;
259 struct target *p_targ;
261 while (p_targ != NULL) {
263 while (p_sym != NULL) {
264 if (!strcasecmp(p_sym->name, p_targ->name))
268 p_targ = p_targ->next;
272 void print_symbol_table()
278 fprintf(sym_fp, "Sym in %-5s: %s\n", areaToString(p->area), p->name);
279 fprintf(sym_fp, " at: 0x%04X (%5d)", p->value, p->value);
280 fprintf(sym_fp, " Def:%s", p->isdef ? "Yes" : "No ");
281 fprintf(sym_fp, " Bit:%s", p->isbit ? "Yes" : "No ");
282 fprintf(sym_fp, " Target:%s", p->istarget ? "Yes" : "No ");
283 fprintf(sym_fp, " Line %d\n", p->line_def);
286 fprintf (sym_fp, "%-5s", "SFR");
287 } else if (p->isbit && !p->area) {
288 fprintf (sym_fp, "%-5s", "SBIT");
289 } else if (p->mode=='=') {
290 fprintf (sym_fp,"ABS");
291 } else if (!p->isdef) {
292 fprintf (sym_fp,"EXTRN");
294 fprintf (sym_fp, "%-5s", areaToString(p->area));
296 fprintf (sym_fp, " 0x%04x (%5d)", p->value, p->value);
297 fprintf (sym_fp, " %s", p->isdef ? "D" : "-");
298 fprintf (sym_fp, "%s", p->isbit ? "B" : "-");
299 fprintf (sym_fp, "%s", p->istarget ? "T" : "-");
300 fprintf (sym_fp, " %s\n", p->name);
306 /* check that every symbol is in the table only once */
308 void check_redefine()
310 struct symbol *p1, *p2;
315 if (!strcasecmp(p1->name, p2->name)) {
316 fprintf(stderr, "Error: symbol '%s' redefined on line %d",
317 p1->name, p2->line_def);
318 fprintf(stderr, ", first defined on line %d\n", p1->line_def);
327 int is_target(char *thename)
332 if (!strcasecmp(thename, p->name)) return (p->istarget);
338 int is_bit(char *thename)
343 if (!strcasecmp(thename, p->name)) return (p->isbit);
349 int is_reg(char *thename)
354 if (!strcasecmp(thename, p->name)) return (p->isreg);
361 struct symbol *is_def(char *thename)
366 if (!strcasecmp(thename, p->name) && p->isdef)
373 struct symbol *is_ref(char *thename) {
377 if (strcasecmp(thename, p->name)==0)
384 /* this routine is used to dump a group of bytes to the output */
385 /* it is responsible for generating the list file and sending */
386 /* the bytes one at a time to the object code generator */
387 /* this routine is also responsible for generatine the list file */
388 /* though is it expected that the lexer has placed all the actual */
389 /* original text from the line in "last_line_text" */
391 static short last_area=-1;
395 void out(int *byte_list, int num) {
399 if (num > 0) fprintf(list_fp, "%06X: ", MEM_POS);
400 else fprintf(list_fp, "\t");
402 if (last_area!=current_area) {
403 // emit area information
404 if (area[current_area].size) {
405 fprintf (frel, "A %s size %d flags 0\n",
406 areaToString(current_area),
407 area[current_area].size);
408 if (!area[current_area].defsEmitted) {
409 for (p=sym_list; p; p=p->next) {
410 if (p->global && p->isdef && p->area==current_area) {
412 if (p->name[strlen(p->name)-1]!='$') {
414 fprintf (frel, "S %s Abs%04x\n", p->name, p->value);
416 fprintf (frel, "S %s Def%04x\n", p->name, p->value);
421 area[current_area].defsEmitted=1;
424 last_area=current_area;
426 if (current_area==AREA_CSEG ||
427 current_area==AREA_GSINIT ||
428 current_area==AREA_GSFINAL ||
429 current_area==AREA_XINIT) {
431 for (i=0; i<num; i++) {
433 fprintf (frel, "%sT %04x", i ? "\n" : "", MEM_POS);
435 fprintf (frel, " %02x", byte_list[i]);
437 fprintf (frel, "\n");
438 if (rel_line[0][0]) {
439 fprintf (frel, "%s\n", rel_line[0]);
440 if (rel_line[1][0]) {
441 fprintf (frel, "%s\n", rel_line[1]);
445 for (i=0; i<num; i++) {
446 if (!first && (i % 4) == 0) fprintf(list_fp, "\t");
447 fprintf(list_fp, "%02X", byte_list[i]);
448 if ((i+1) % 4 == 0) {
449 if (first) fprintf(list_fp, "\t%s\n", last_line_text);
450 else fprintf(list_fp, "\n");
453 if (i<num-1) fprintf(list_fp, " ");
458 if (num < 3) fprintf(list_fp, "\t");
459 fprintf(list_fp, "\t%s\n", last_line_text);
461 if (num % 4) fprintf(list_fp, "\n");
470 /* add NOPs to align memory location on a valid branch target address */
474 static int nops[] = {NOP_OPCODE, NOP_OPCODE, NOP_OPCODE, NOP_OPCODE};
477 last_line_text[0] = '\0';
479 for(num=0; (MEM_POS + num) % BRANCH_SPACING; num++) ;
480 if (p3) out(nops, num);
484 /* print branch out of bounds error */
488 fprintf(stderr, "Error: branch out of bounds");
489 fprintf(stderr, " in line %d\n", lineno);
493 /* output the jump either direction on carry */
494 /* jump_dest and MEM_POS must have the proper values */
497 void do_jump_on_carry()
500 operand = REL4(jump_dest, MEM_POS);
504 if (operand > 15) boob_error();
505 out(0x20 + (operand & 15));
507 if (operand > 15) boob_error();
508 out(0x30 + (operand & 15));
514 /* turn a string like "10010110b" into an int */
516 int binary2int(char *str)
518 register int i, j=1, sum=0;
520 for (i=strlen(str)-2; i >= 0; i--) {
521 sum += j * (str[i] == '1');
527 void print_usage(int);
529 void init_areas(void)
531 area[AREA_CSEG].start=area[AREA_CSEG].alloc_position = 0;
532 area[AREA_DSEG].start=area[AREA_DSEG].alloc_position = 0;
533 area[AREA_BSEG].start=area[AREA_BSEG].alloc_position = 0;
534 area[AREA_XSEG].start=area[AREA_XSEG].alloc_position = 0;
535 area[AREA_XISEG].start=area[AREA_XISEG].alloc_position = 0;
536 area[AREA_XINIT].start=area[AREA_XINIT].alloc_position = 0;
537 area[AREA_GSINIT].start=area[AREA_GSINIT].alloc_position = 0;
538 area[AREA_GSFINAL].start=area[AREA_GSFINAL].alloc_position = 0;
539 area[AREA_HOME].start=area[AREA_HOME].alloc_position = 0;
544 int i, areas=0, globals=0;
547 fprintf (frel, "SDCCXA rel, version %1.1f\n", version);
548 for (i=1; i<NUM_AREAS; i++) {
549 if ((area[i].size=area[i].alloc_position-area[i].start)) {
553 for (p=sym_list; p; p=p->next) {
555 // skip temp labels, sfr and sbit
556 if (p->name[strlen(p->name)-1]!='$' &&
562 fprintf (frel, "H %d areas %d global symbols\n", areas, globals);
563 fprintf (frel, "M %s\n", modulename);
564 for (p=sym_list; p; p=p->next) {
566 fprintf (frel, "S %s Ref0000\n", p->name);
571 void printVersion() {
572 printf("\nPaul's XA51 Assembler\n");
573 printf("Copyright 1997,2002 Paul Stoffregen\n\n");
574 printf("This program is free software; you can redistribute it\n");
575 printf("and/or modify it under the terms of the GNU General Public\n");
576 printf("License, Version 2, published by the Free Software Foundation\n\n");
577 printf("This program is distributed in the hope that it will be useful,\n");
578 printf("but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
579 printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
582 int verbose=0, createSymbolFile=0;
584 void process_args(int argc, char **argv)
588 if (argc < 2) print_usage(1);
590 while (++i<argc && *argv[i]=='-') {
591 if (strcmp(argv[i], "--version")==0) {
595 if (strcmp(argv[i], "--help")==0) {
598 if (strcmp(argv[i], "-v")==0) {
602 if (strcmp(argv[i], "-s")==0) {
610 // only 1 source file for now
614 strcpy(infilename, argv[i]);
616 if (strncasecmp(infilename+strlen(infilename)-4, ".asm", 3)) {
617 fprintf (stderr, "unrecognized input file: \"%s\"\n", argv[i]);
621 strcpy(modulename, infilename);
622 modulename[strlen(modulename)-4] = '\0';
623 sprintf (outfilename, "%s.rel", modulename);
624 sprintf (listfilename, "%s.lst", modulename);
625 if (createSymbolFile) {
626 sprintf (symfilename, "%s.sym", modulename);
630 /* pass #1 (p1=1) find all symbol defs and branch target names */
631 /* pass #2 (p2=1) align branch targets, evaluate all symbols */
632 /* pass #3 (p3=1) produce object code */
634 int main(int argc, char **argv)
636 process_args (argc, argv);
638 yyin = fopen(infilename, "r");
640 fprintf(stderr, "Can't open file '%s'.\n", infilename);
643 frel = fopen(outfilename, "w");
645 fprintf(stderr, "Can't write file '%s'.\n", outfilename);
648 list_fp = fopen(listfilename, "w");
649 if (list_fp == NULL) {
650 fprintf(stderr, "Can't write file '%s'.\n", listfilename);
653 if (createSymbolFile) {
654 sym_fp = fopen(symfilename, "w");
655 if (sym_fp == NULL) {
656 fprintf(stderr, "Can't write file '%s'.\n", symfilename);
661 if (verbose) printf("Pass 1: Building Symbol Table:\n");
668 if (verbose) printf("Pass 2: Aligning Branch Targets:\n");
678 if (createSymbolFile) print_symbol_table();
680 if (verbose) printf("Pass 3: Generating Object Code:\n");
694 void print_usage(int fatal)
696 FILE *out = fatal ? stderr : stdout;
698 fprintf (out, "Usage: xa_asm [-s] [-v] file.xa\n");
699 fprintf (out, " -v verbose: show progress\n");
700 fprintf (out, " -s create symbol file\n");
701 fprintf (out, " --version show version/copyright info and exit\n");
702 fprintf (out, " --help show this and exit\n");
704 // some usefull options I can think of.
705 fprintf (out, " -m create map file\n");
706 fprintf (out, " -ss create symbol file sorted by symbol\n");
707 fprintf (out, " -sa create symbol file sorted by segment/address\n");
708 fprintf (out, " --no-temps supress temp symbols in map and sym file\n");
709 fprintf (out, " --code-loc=# sets the start address of the code\n");
710 fprintf (out, " --xdata-loc=# sets the start address of the external data\n");
711 fprintf (out, " --stack-loc=# sets the start address of the stack\n");