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");
205 int get_value(char *thename)
210 if (!(strcasecmp(thename, p->name)))
214 fprintf(stderr, "Internal Error! Couldn't find symbol value\n");
220 /* add every branch target to this list as we find them */
221 /* ok if multiple entries of same symbol name in this list */
223 struct target * build_target_list(char *thename)
225 struct target *new, *p;
226 new = (struct target *) malloc(sizeof(struct target));
227 new->name = (char *) malloc(strlen(thename)+1);
228 strcpy(new->name, thename);
230 if (targ_list == NULL) return (targ_list = new);
232 while (p->next != NULL) p = p->next;
237 /* figure out which symbols are branch targets */
241 struct symbol *p_sym;
242 struct target *p_targ;
244 while (p_targ != NULL) {
246 while (p_sym != NULL) {
247 if (!strcasecmp(p_sym->name, p_targ->name))
251 p_targ = p_targ->next;
255 void print_symbol_table()
261 fprintf(sym_fp, "Sym in %-5s: %s\n", areaToString(p->area), p->name);
262 fprintf(sym_fp, " at: 0x%04X (%5d)", p->value, p->value);
263 fprintf(sym_fp, " Def:%s", p->isdef ? "Yes" : "No ");
264 fprintf(sym_fp, " Bit:%s", p->isbit ? "Yes" : "No ");
265 fprintf(sym_fp, " Target:%s", p->istarget ? "Yes" : "No ");
266 fprintf(sym_fp, " Line %d\n", p->line_def);
269 fprintf (sym_fp, "%-5s", "SFR");
270 } else if (p->isbit && !p->area) {
271 fprintf (sym_fp, "%-5s", "SBIT");
272 } else if (!p->isdef) {
273 fprintf (sym_fp,"EXTRN");
275 fprintf (sym_fp, "%-5s", areaToString(p->area));
277 fprintf (sym_fp, " 0x%04x (%5d)", p->value, p->value);
278 fprintf (sym_fp, " %s", p->isdef ? "D" : "-");
279 fprintf (sym_fp, "%s", p->isbit ? "B" : "-");
280 fprintf (sym_fp, "%s", p->istarget ? "T" : "-");
281 fprintf (sym_fp, " %s\n", p->name);
287 /* check that every symbol is in the table only once */
289 void check_redefine()
291 struct symbol *p1, *p2;
296 if (!strcasecmp(p1->name, p2->name)) {
297 fprintf(stderr, "Error: symbol '%s' redefined on line %d",
298 p1->name, p2->line_def);
299 fprintf(stderr, ", first defined on line %d\n", p1->line_def);
308 int is_target(char *thename)
313 if (!strcasecmp(thename, p->name)) return (p->istarget);
319 int is_bit(char *thename)
324 if (!strcasecmp(thename, p->name)) return (p->isbit);
330 int is_reg(char *thename)
335 if (!strcasecmp(thename, p->name)) return (p->isreg);
342 struct symbol *is_def(char *thename)
347 if (!strcasecmp(thename, p->name) && p->isdef)
354 struct symbol *is_ref(char *thename) {
358 if (strcasecmp(thename, p->name)==0)
365 /* this routine is used to dump a group of bytes to the output */
366 /* it is responsible for generating the list file and sending */
367 /* the bytes one at a time to the object code generator */
368 /* this routine is also responsible for generatine the list file */
369 /* though is it expected that the lexer has placed all the actual */
370 /* original text from the line in "last_line_text" */
372 static short last_area=-1;
376 void out(int *byte_list, int num) {
380 if (num > 0) fprintf(list_fp, "%06X: ", MEM_POS);
381 else fprintf(list_fp, "\t");
383 if (last_area!=current_area) {
384 // emit area information
385 if (area[current_area].size) {
386 fprintf (frel, "A %s size %d flags 0\n",
387 areaToString(current_area),
388 area[current_area].size);
389 if (!area[current_area].defsEmitted) {
390 for (p=sym_list; p; p=p->next) {
391 if (p->isdef && p->area==current_area) {
393 if (p->name[strlen(p->name)-1]!='$') {
394 fprintf (frel, "S %s Def%04x\n", p->name, p->value);
398 area[current_area].defsEmitted=1;
401 last_area=current_area;
403 if (current_area==AREA_CSEG ||
404 current_area==AREA_GSINIT ||
405 current_area==AREA_GSFINAL ||
406 current_area==AREA_XINIT) {
408 fprintf (frel, "T %04x", MEM_POS);
409 for (i=0; i<num; i++) {
410 fprintf (frel, " %02x", byte_list[i]);
412 fprintf (frel, "\n");
413 if (rel_line[0][0]) {
414 fprintf (frel, "%s\n", rel_line[0]);
415 if (rel_line[1][0]) {
416 fprintf (frel, "%s\n", rel_line[1]);
420 for (i=0; i<num; i++) {
421 if (!first && (i % 4) == 0) fprintf(list_fp, "\t");
422 fprintf(list_fp, "%02X", byte_list[i]);
423 if ((i+1) % 4 == 0) {
424 if (first) fprintf(list_fp, "\t%s\n", last_line_text);
425 else fprintf(list_fp, "\n");
428 if (i<num-1) fprintf(list_fp, " ");
433 if (num < 3) fprintf(list_fp, "\t");
434 fprintf(list_fp, "\t%s\n", last_line_text);
436 if (num % 4) fprintf(list_fp, "\n");
445 /* add NOPs to align memory location on a valid branch target address */
449 static int nops[] = {NOP_OPCODE, NOP_OPCODE, NOP_OPCODE, NOP_OPCODE};
452 last_line_text[0] = '\0';
454 for(num=0; (MEM_POS + num) % BRANCH_SPACING; num++) ;
455 if (p3) out(nops, num);
459 /* print branch out of bounds error */
463 fprintf(stderr, "Error: branch out of bounds");
464 fprintf(stderr, " in line %d\n", lineno);
468 /* output the jump either direction on carry */
469 /* jump_dest and MEM_POS must have the proper values */
472 void do_jump_on_carry()
475 operand = REL4(jump_dest, MEM_POS);
479 if (operand > 15) boob_error();
480 out(0x20 + (operand & 15));
482 if (operand > 15) boob_error();
483 out(0x30 + (operand & 15));
489 /* turn a string like "10010110b" into an int */
491 int binary2int(char *str)
493 register int i, j=1, sum=0;
495 for (i=strlen(str)-2; i >= 0; i--) {
496 sum += j * (str[i] == '1');
502 void print_usage(int);
504 void init_areas(void)
506 area[AREA_CSEG].start=area[AREA_CSEG].alloc_position = 0;
507 area[AREA_DSEG].start=area[AREA_DSEG].alloc_position = 0;
508 area[AREA_BSEG].start=area[AREA_BSEG].alloc_position = 0;
509 area[AREA_XSEG].start=area[AREA_XSEG].alloc_position = 0;
510 area[AREA_XISEG].start=area[AREA_XISEG].alloc_position = 0;
511 area[AREA_XINIT].start=area[AREA_XINIT].alloc_position = 0;
512 area[AREA_GSINIT].start=area[AREA_GSINIT].alloc_position = 0;
513 area[AREA_GSFINAL].start=area[AREA_GSFINAL].alloc_position = 0;
514 area[AREA_HOME].start=area[AREA_HOME].alloc_position = 0;
519 int i, areas=0, globals=0;
522 fprintf (frel, "SDCCXA rel, version %1.1f\n", version);
523 for (i=0; i<NUM_AREAS; i++) {
524 if ((area[i].size=area[i].alloc_position-area[i].start)) {
528 for (p=sym_list; p; p=p->next) {
530 // skip temp labels, sfr and sbit
531 if (p->name[strlen(p->name)-1]!='$' &&
537 fprintf (frel, "H %d areas %d global symbols\n", areas, globals);
538 fprintf (frel, "M %s\n", modulename);
539 for (p=sym_list; p; p=p->next) {
541 fprintf (frel, "S %s Ref0000\n", p->name);
546 void printVersion() {
547 printf("\nPaul's XA51 Assembler\n");
548 printf("Copyright 1997,2002 Paul Stoffregen\n\n");
549 printf("This program is free software; you can redistribute it\n");
550 printf("and/or modify it under the terms of the GNU General Public\n");
551 printf("License, Version 2, published by the Free Software Foundation\n\n");
552 printf("This program is distributed in the hope that it will be useful,\n");
553 printf("but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
554 printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
557 int verbose=0, createSymbolFile=0;
559 void process_args(int argc, char **argv)
563 if (argc < 2) print_usage(1);
565 while (++i<argc && *argv[i]=='-') {
566 if (strcmp(argv[i], "--version")==0) {
570 if (strcmp(argv[i], "--help")==0) {
573 if (strcmp(argv[i], "-v")==0) {
577 if (strcmp(argv[i], "-s")==0) {
585 // only 1 source file for now
589 strcpy(infilename, argv[i]);
591 if (strncasecmp(infilename+strlen(infilename)-3, ".xa", 3)) {
592 fprintf (stderr, "unrecognized input file: \"%s\"\n", argv[i]);
596 strcpy(modulename, infilename);
597 modulename[strlen(modulename)-3] = '\0';
598 sprintf (outfilename, "%s.rel", modulename);
599 sprintf (listfilename, "%s.lst", modulename);
600 if (createSymbolFile) {
601 sprintf (symfilename, "%s.sym", modulename);
605 /* pass #1 (p1=1) find all symbol defs and branch target names */
606 /* pass #2 (p2=1) align branch targets, evaluate all symbols */
607 /* pass #3 (p3=1) produce object code */
609 int main(int argc, char **argv)
611 process_args (argc, argv);
613 yyin = fopen(infilename, "r");
615 fprintf(stderr, "Can't open file '%s'.\n", infilename);
618 frel = fopen(outfilename, "w");
620 fprintf(stderr, "Can't write file '%s'.\n", outfilename);
623 list_fp = fopen(listfilename, "w");
624 if (list_fp == NULL) {
625 fprintf(stderr, "Can't write file '%s'.\n", listfilename);
628 if (createSymbolFile) {
629 sym_fp = fopen(symfilename, "w");
630 if (sym_fp == NULL) {
631 fprintf(stderr, "Can't write file '%s'.\n", symfilename);
636 if (verbose) printf("Pass 1: Building Symbol Table:\n");
643 if (verbose) printf("Pass 2: Aligning Branch Targets:\n");
653 if (createSymbolFile) print_symbol_table();
655 if (verbose) printf("Pass 3: Generating Object Code:\n");
669 void print_usage(int fatal)
671 FILE *out = fatal ? stderr : stdout;
673 fprintf (out, "Usage: xa_asm [-s] [-v] file.xa\n");
674 fprintf (out, " -v verbose: show progress\n");
675 fprintf (out, " -s create symbol file\n");
676 fprintf (out, " --version show version/copyright info and exit\n");
677 fprintf (out, " --help show this and exit\n");
679 // some usefull options I can think of.
680 fprintf (out, " -m create map file\n");
681 fprintf (out, " -ss create symbol file sorted by symbol\n");
682 fprintf (out, " -sa create symbol file sorted by segment/address\n");
683 fprintf (out, " --no-temps supress temp symbols in map and sym file\n");
684 fprintf (out, " --code-loc=# sets the start address of the code\n");
685 fprintf (out, " --xdata-loc=# sets the start address of the external data\n");
686 fprintf (out, " --stack-loc=# sets the start address of the stack\n");