4 * (C) Copyright 1989-1995
11 * 29-Oct-97 JLH pass ";!" comments to output file
24 * The module asmain.c includes the command argument parser,
25 * the three pass sequencer, and the machine independent
26 * assembler parsing code.
28 * asmain.c contains the following functions:
29 * VOID main(argc, argv)
32 * FILE * afile(fn, ft, wf)
37 * asmain.c contains the array char *usetxt[] which
38 * references the usage text strings printed by usage().
41 static const char *search_path[100];
42 static int search_path_length;
45 * The search_path_append is used to append another directory to the end
46 * of the include file search path.
49 * The directory to be added to the path.
52 search_path_append(const char *dir)
54 if (search_path_length < sizeof(search_path)/sizeof(char*))
56 search_path[search_path_length++] = dir;
61 * The search_path_fopen function is used to open the named file. If
62 * the file isn't in the current directory, the search path is then used
63 * to build a series of possible file names, and attempts to open them.
64 * The first found is used.
67 * The name of the file to be opened.
69 * The mode of the file to be opened.
71 * what the fopen function would return on success, or NULL if the
72 * file is not anywhere in the search path.
75 search_path_fopen(const char *filename, const char *mode)
80 fp = fopen(filename, mode);
81 if (fp != NULL || filename[0] == '/' || filename[0] == '\\')
83 for (j = 0; j < search_path_length; ++j)
87 strncpy(path, search_path[j], sizeof(path));
88 if ((path[strlen(path) - 1] != '/') &&
89 (path[strlen(path) - 1] != DIR_SEPARATOR_CHAR))
91 strncat(path, DIR_SEPARATOR_STRING, sizeof(path));
93 strncat(path, filename, sizeof(path));
94 fp = fopen(path, mode);
102 /*)Function VOID main(argc, argv)
104 * int argc argument count
105 * char * argv array of pointers to argument strings
107 * The function main() is the entry point to the assembler.
108 * The purpose of main() is to (1) parse the command line
109 * arguments for options and source file specifications and
110 * (2) to process the source files through the 3 pass assembler.
111 * Before each assembler pass various variables are initialized
112 * and source files are rewound to their beginning. During each
113 * assembler pass each assembler-source text line is processed.
114 * After each assembler pass the assembler information is flushed
115 * to any opened output files and the if-else-endif processing
116 * is checked for proper termination.
118 * The function main() is also responsible for opening all
119 * output files (REL, LST, and SYM), sequencing the global (-g)
120 * and all-global (-a) variable definitions, and dumping the
121 * REL file header information.
124 * char * p pointer to argument string
125 * int c character from argument string
126 * int i argument loop counter
127 * area * ap pointer to area structure
130 * int aflag -a, make all symbols global flag
131 * char afn[] afile() constructed filespec
132 * area * areap pointer to an area structure
133 * int cb[] array of assembler output values
134 * int cbt[] array of assembler relocation types
135 * describing the data in cb[]
136 * int cfile current file handle index
137 * of input assembly files
138 * int * cp pointer to assembler output array cb[]
139 * int * cpt pointer to assembler relocation type
141 * char eb[] array of generated error codes
142 * char * ep pointer into error list array eb[]
143 * int fflag -f(f), relocations flagged flag
144 * int flevel IF-ELSE-ENDIF flag will be non
145 * zero for false conditional case
146 * Addr_T fuzz tracks pass to pass changes in the
147 * address of symbols caused by
148 * variable length instruction formats
149 * int gflag -g, make undefined symbols global flag
150 * char ib[] assembler-source text line
151 * int inpfil count of assembler
152 * input files specified
153 * int ifcnd[] array of IF statement condition
154 * values (0 = FALSE) indexed by tlevel
155 * int iflvl[] array of IF-ELSE-ENDIF flevel
156 * values indexed by tlevel
157 * int incfil current file handle index
159 * char * ip pointer into the assembler-source
161 * jmp_buf jump_env compiler dependent structure
162 * used by setjmp() and longjmp()
163 * int lflag -l, generate listing flag
164 * int line current assembler source
166 * int lop current line number on page
167 * int oflag -o, generate relocatable output flag
168 * int jflag -j, generate debug info flag
169 * int page current page number
170 * int pflag enable listing pagination
171 * int pass assembler pass number
172 * int radix current number conversion radix:
173 * 2 (binary), 8 (octal), 10 (decimal),
175 * int sflag -s, generate symbol table flag
176 * char srcfn[][] array of source file names
177 * int srcline[] current source file line
178 * char stb[] Subtitle string buffer
179 * sym * symp pointer to a symbol structure
180 * int tlevel current conditional level
181 * int xflag -x, listing radix flag
182 * FILE * lfp list output file handle
183 * FILE * ofp relocation output file handle
184 * FILE * tfp symbol table output file handle
185 * FILE * sfp[] array of assembler-source file handles
188 * FILE * afile() asmain.c
189 * VOID allglob() assym.c
190 * VOID asexit() asmain.c
191 * VOID diag() assubr.c
192 * VOID err() assubr.c
193 * int fprintf() c-library
194 * int as_getline() aslex.c
195 * VOID list() aslist.c
196 * VOID lstsym() aslist.c
197 * VOID minit() ___mch.c
198 * VOID newdot() asmain.c
199 * VOID outchk() asout.c
200 * VOID outgsd() asout.c
201 * int rewind() c-library
202 * int setjmp() c-library
203 * VOID symglob() assym.c
204 * VOID syminit() assym.c
205 * VOID usage() asmain.c
208 * Completion of main() completes the assembly process.
209 * REL, LST, and/or SYM files may be generated.
223 /*fprintf(stdout, "\n");*/
226 for (i=1; i<argc; ++i) {
232 while ((c = *p++) != 0)
252 search_path_append(p);
257 case 'j': /* JLH: debug info */
260 ++oflag; /* force object */
307 if (++inpfil == MAXFIL) {
308 fprintf(stderr, "too many input files\n");
311 sfp[inpfil] = afile(p, "", 0);
312 strcpy(srcfn[inpfil],afn);
315 lfp = afile(p, "lst", 1);
317 ofp = afile(p, "rel", 1);
318 // save the file name if we have to delete it on error
322 tfp = afile(p, "sym", 1);
329 for (pass=0; pass<3; ++pass) {
330 if (gflag && pass == 1)
332 if (aflag && pass == 1)
334 if (oflag && pass == 2)
347 for (i = 0; i <= inpfil; i++)
360 while (as_getline()) {
366 /* JLH: if line begins with ";!", then
367 * pass this comment on to the output file
369 if (oflag && (pass == 1) &&
370 (ip[0] == ';') && (ip[1] == '!'))
372 fprintf(ofp, "%s\n", ip );
375 if (setjmp(jump_env) == 0)
383 newdot(dot.s_area); /* Flush area info */
384 if (flevel || tlevel)
388 outchk(HUGE, HUGE); /* Flush */
395 //printf ("aserr: %d\n", aserr);
396 //printf ("fatalErrors: %d\n", fatalErrors);
398 return 0; // hush the compiler
401 /*)Function VOID asexit(i)
405 * The function asexit() explicitly closes all open
406 * files and then terminates the program.
412 * FILE * ifp[] array of include-file file handles
413 * FILE * lfp list output file handle
414 * FILE * ofp relocation output file handle
415 * FILE * tfp symbol table output file handle
416 * FILE * sfp[] array of assembler-source file handles
419 * int fclose() c-library
420 * VOID exit() c-library
423 * All files closed. Program terminates.
432 if (lfp != NULL) fclose(lfp);
433 if (ofp != NULL) fclose(ofp);
434 if (tfp != NULL) fclose(tfp);
436 for (j=0; j<MAXFIL && sfp[j] != NULL; j++) {
440 /*for (j=0; j<MAXINC && ifp[j] != NULL; j++) {
444 // remove output file
445 printf ("removing %s\n", relFile);
451 /*)Function VOID asmbl()
453 * The function asmbl() scans the assembler-source text for
454 * (1) labels, global labels, equates, global equates, and local
455 * symbols, (2) .if, .else, .endif, and .page directives,
456 * (3) machine independent assembler directives, and (4) machine
457 * dependent mnemonics.
460 * mne * mp pointer to a mne structure
461 * sym * sp pointer to a sym structure
462 * tsym * tp pointer to a tsym structure
463 * int c character from assembler-source
465 * area * ap pointer to an area structure
466 * expr e1 expression structure
467 * char id[] id string
468 * char opt[] options string
469 * char fn[] filename string
470 * char * p pointer into a string
471 * int d temporary value
472 * int n temporary value
473 * int uaf user area options flag
474 * int uf area options
477 * area * areap pointer to an area structure
478 * char ctype[] array of character types, one per
480 * int flevel IF-ELSE-ENDIF flag will be non
481 * zero for false conditional case
482 * Addr_T fuzz tracks pass to pass changes in the
483 * address of symbols caused by
484 * variable length instruction formats
485 * int ifcnd[] array of IF statement condition
486 * values (0 = FALSE) indexed by tlevel
487 * int iflvl[] array of IF-ELSE-ENDIF flevel
488 * values indexed by tlevel
489 * FILE * ifp[] array of include-file file handles
490 * char incfn[][] array of include file names
491 * int incline[] current include file line
492 * int incfil current file handle index
494 * Addr_T laddr address of current assembler line
495 * or value of .if argument
496 * int lmode listing mode
497 * int lop current line number on page
498 * char module[] module name string
499 * int pass assembler pass number
500 * int radix current number conversion radix:
501 * 2 (binary), 8 (octal), 10 (decimal),
503 * char stb[] Subtitle string buffer
504 * sym * symp pointer to a symbol structure
505 * char tb[] Title string buffer
506 * int tlevel current conditional level
509 * Addr_T absexpr() asexpr.c
510 * area * alookup() assym.c
511 * VOID clrexpr() asexpr.c
512 * int digit() asexpr.c
513 * char endline() aslex.c
514 * VOID err() assubr.c
515 * VOID expr() asexpr.c
516 * FILE * fopen() c-library
518 * VOID getid() aslex.c
519 * int getmap() aslex.c
520 * char getnb() aslex.c
521 * VOID getst() aslex.c
522 * sym * lookup() assym.c
523 * VOID machine() ___mch.c
524 * mne * mlookup() assym.c
526 * VOID * new() assym.c
527 * VOID newdot() asmain.c
528 * VOID outall() asout.c
529 * VOID outab() asout.c
530 * VOID outchk() asout.c
531 * VOID outrb() asout.c
532 * VOID outrw() asout.c
533 * VOID phase() asmain.c
534 * VOID qerr() assubr.c
535 * char * strcpy() c-library
536 * char * strncpy() c-library
537 * VOID unget() aslex.c
543 register struct mne *mp;
544 register struct sym *sp;
545 register struct tsym *tp;
554 static struct area *abs_ap; /* pointer to current absolute area structure */
559 if ((c=endline()) == 0) { return; }
561 * If the first character is a digit then assume
562 * a local symbol is being specified. The symbol
563 * must end with $: to be valid.
565 * Construct a tsym structure at the first
566 * occurance of the symbol. Flag the symbol
567 * as multiply defined if not the first occurance.
569 * Load area, address, and fuzz values
570 * into structure tsym.
572 * Check for assembler phase error and
573 * multiply defined error.
575 if (ctype[c] & DIGIT) {
579 while ((d = digit(c, 10)) >= 0) {
583 if (c != '$' || get() != ':')
588 if (n == tp->t_num) {
595 tp=(struct tsym *) new (sizeof(struct tsym));
596 tp->t_lnk = symp->s_tsym;
599 tp->t_area = dot.s_area;
600 tp->t_addr = dot.s_addr;
605 if (n == tp->t_num) {
612 fuzz = tp->t_addr - dot.s_addr;
613 tp->t_area = dot.s_area;
614 tp->t_addr = dot.s_addr;
616 phase(tp->t_area, tp->t_addr);
617 if (tp->t_flg & S_MDF)
628 * If the first character is a letter then assume a label,
629 * symbol, assembler directive, or assembler mnemonic is
632 if ((ctype[c] & LETTER) == 0) {
642 * If the next character is a : then a label is being processed.
643 * A double :: defines a global label. If this is new label
644 * then create a symbol structure.
646 * Flag multiply defined labels.
648 * Load area, address, and fuzz values
649 * into structure symp.
651 * Check for assembler phase error and
652 * multiply defined error.
657 if ((c = get()) != ':') {
665 if ((symp->s_type != S_NEW) &&
666 ((symp->s_flag & S_ASG) == 0))
667 symp->s_flag |= S_MDF;
669 fuzz = symp->s_addr - dot.s_addr;
670 symp->s_type = S_USER;
671 symp->s_area = dot.s_area;
672 symp->s_addr = dot.s_addr;
674 if (symp->s_flag & S_MDF)
676 phase(symp->s_area, symp->s_addr);
679 symp->s_flag |= S_GBL;
685 * If the next character is a = then an equate is being processed.
686 * A double == defines a global equate. If this is new variable
687 * then create a symbol structure.
692 if ((c = get()) != '=') {
701 if (e1.e_flag || e1.e_base.e_ap != dot.s_area)
704 if (sp->s_type != S_NEW && (sp->s_flag & S_ASG) == 0) {
708 sp->s_area = e1.e_base.e_ap;
709 sp->s_addr = laddr = e1.e_addr;
718 lmode = flevel ? SLIST : CLIST;
719 if ((mp = mlookup(id)) == NULL) {
725 * If we have gotten this far then we have found an
726 * assembler directive or an assembler mnemonic.
728 * Check for .if, .else, .endif, and .page directives
729 * which are not controlled by the conditional flags
731 switch (mp->m_type) {
735 if (tlevel < MAXIF) {
738 iflvl[tlevel] = flevel;
751 if (++flevel > (iflvl[tlevel]+1)) {
755 if (--flevel < iflvl[tlevel]) {
764 flevel = iflvl[tlevel--];
782 * If we are not in a false state for .if/.else then
783 * process the assembler directives here.
785 switch (mp->m_type) {
789 laddr = dot.s_addr = (dot.s_addr + 1) & ~1;
795 laddr = dot.s_addr |= 1;
804 if (mp->m_type == S_BYTE) {
809 } while ((c = getnb()) == ',');
815 if ((d = getnb()) == '\0')
817 while ((c = getmap(d)) >= 0)
819 if (mp->m_type == S_ASCIZ)
824 if ((d = getnb()) == '\0')
828 if ((n = getmap(d)) >= 0) {
841 dot.s_addr += e1.e_addr*mp->m_valu;
847 if ((c = getnb()) != 0) {
849 if (p < &tb[NTITL-1])
851 } while ((c = get()) != 0);
860 if ((c = getnb()) != 0) {
862 if (p < &stb[NSBTL-1])
864 } while ((c = get()) != 0);
872 getst(id, getnb()); // a module can start with a digit
877 strncpy(module, id, NCPS);
885 if ((c = getnb()) != 0) {
887 if (p < &optsdcc[NINPUT-1])
889 } while ((c = get()) != 0);
894 /*if (pass == 0) printf("optsdcc=%s\n", optsdcc);*/
902 } while ((c = getnb()) == ',');
911 if ((c = getnb()) == '(') {
915 if (mp && mp->m_type == S_ATYP) {
921 } while ((c = getnb()) == ',');
927 if ((ap = alookup(id)) != NULL) {
928 if (uaf && uf != ap->a_flag)
931 ap = (struct area *) new (sizeof(struct area));
933 strncpy(ap->a_id, id, NCPS);
934 ap->a_ref = areap->a_ref + 1;
938 ap->a_flag = uaf ? uf : (A_CON|A_REL);
943 if (dot.s_area->a_flag & A_ABS)
948 if (dot.s_area->a_flag & A_ABS) {
951 sprintf(buf, "%s%x", abs_ap->a_id, laddr);
952 if ((ap = alookup(buf)) == NULL) {
953 ap = (struct area *) new (sizeof(struct area));
956 strncpy(ap->a_id, buf, NCPS);
957 ap->a_ref = areap->a_ref + 1;
964 dot.s_addr = dot.s_org = laddr;
1008 while ((c = get()) != d) {
1009 if (p < &fn[PATH_MAX-1]) {
1016 if ((++incfil == MAXINC) ||
1017 (ifp[incfil] = search_path_fopen(fn, "r")) == NULL) {
1022 incline[incfil] = 0;
1023 strcpy(incfn[incfil],fn);
1033 if (!as_strcmpi(id, "on"))
1035 /* Quick sanity check: size of
1036 * Addr_T must be at least 24 bits.
1038 if (sizeof(Addr_T) < 3)
1042 "Cannot enable Flat24 mode: "
1043 "host system must have 24 bit "
1044 "or greater integers.\n");
1051 else if (!as_strcmpi(id, "off"))
1066 printf("as8051: ds390 flat mode %sabled.\n",
1067 flat24Mode ? "en" : "dis");
1073 * If not an assembler directive then go to
1074 * the machine dependent function which handles
1075 * all the assembler mnemonics.
1079 /* if cdb information then generate the line info */
1080 if (cflag && (pass == 1))
1083 /* JLH: if -j, generate a line number symbol */
1084 if (jflag && (pass == 1))
1093 /*)Function FILE * afile(fn, ft, wf)
1095 * char * fn file specification string
1096 * char * ft file type string
1097 * int wf read(0)/write(1) flag
1099 * The function afile() opens a file for reading or writing.
1100 * (1) If the file type specification string ft
1101 * is not NULL then a file specification is
1102 * constructed with the file path\name in fn
1103 * and the extension in ft.
1104 * (2) If the file type specification string ft
1105 * is NULL then the file specification is
1106 * constructed from fn. If fn does not have
1107 * a file type then the default source file
1108 * type dsft is appended to the file specification.
1110 * afile() returns a file handle for the opened file or aborts
1111 * the assembler on an open error.
1114 * int c character value
1115 * FILE * fp filehandle for opened file
1116 * char * p1 pointer to filespec string fn
1117 * char * p2 pointer to filespec string fb
1118 * char * p3 pointer to filetype string ft
1121 * char afn[] afile() constructed filespec
1122 * char dsft[] default assembler file type string
1123 * char afn[] constructed file specification string
1126 * VOID asexit() asmain.c
1127 * FILE * fopen() c_library
1128 * int fprintf() c_library
1131 * File is opened for read or write.
1140 register char *p2, *p3;
1148 p2 = strrchr (afn, FSEPX); // search last '.'
1150 p2 = afn + strlen (afn);
1151 if (p2 > &afn[PATH_MAX-4]) // truncate filename, if it's too long
1152 p2 = &afn[PATH_MAX-4];
1155 // choose a file-extension
1156 if (*p3 == 0) { // extension supplied?
1157 p3 = strrchr (fn, FSEPX); // no: extension in fn?
1161 p3 = dsft; // no: default extension
1164 while ((c = *p3++) != 0) { // strncpy
1165 if (p2 < &afn[PATH_MAX-1])
1170 if ((fp = fopen(afn, wf?"w":"r")) == NULL) {
1171 fprintf(stderr, "%s: cannot %s.\n", afn, wf?"create":"open");
1177 /*)Function VOID newdot(nap)
1179 * area * nap pointer to the new area structure
1181 * The function newdot():
1182 * (1) copies the current values of fuzz and the last
1183 * address into the current area referenced by dot
1184 * (2) loads dot with the pointer to the new area and
1185 * loads the fuzz and last address parameters
1186 * (3) outall() is called to flush any remaining
1187 * bufferred code from the old area to the output
1190 * area * oap pointer to old area
1193 * sym dot defined as sym[0]
1194 * Addr_T fuzz tracks pass to pass changes in the
1195 * address of symbols caused by
1196 * variable length instruction formats
1202 * Current area saved, new area loaded, buffers flushed.
1207 register struct area *nap;
1209 register struct area *oap;
1212 /* fprintf (stderr, "%s dot.s_area->a_size: %d dot.s_addr: %d\n",
1213 oap->a_id, dot.s_area->a_size, dot.s_addr); */
1215 if (oap->a_flag & A_OVR) {
1216 // the size of an overlay is the biggest size encountered
1217 if (oap->a_size < dot.s_addr) {
1218 oap->a_size = dot.s_addr;
1220 } else if (oap->a_flag & A_ABS) {
1221 oap->a_addr = dot.s_org;
1222 oap->a_size += dot.s_addr - dot.s_org;
1223 dot.s_addr = dot.s_org = 0;
1226 oap->a_size = dot.s_addr;
1228 if (nap->a_flag & A_OVR) {
1229 // a new overlay starts at 0, no fuzz
1232 } else if (nap->a_flag & A_ABS) {
1233 // a new absolute starts at org, no fuzz
1234 dot.s_addr = dot.s_org;
1237 dot.s_addr = nap->a_size;
1244 /*)Function VOID phase(ap, a)
1246 * area * ap pointer to area
1247 * Addr_T a address in area
1249 * Function phase() compares the area ap and address a
1250 * with the current area dot.s_area and address dot.s_addr
1251 * to determine if the position of the symbol has changed
1252 * between assembler passes.
1258 * sym * dot defined as sym[0]
1264 * The p error is invoked if the area and/or address
1273 if (ap != dot.s_area || a != dot.s_addr)
1278 "Usage: [-dqxjgalopsf][ -I<dir> ] file1 [file2 file3 ...]",
1279 " d decimal listing",
1281 " x hex listing (default)",
1282 " j add line number and debug information to file", /* JLH */
1283 " g undefined symbols made global",
1284 " a all user symbols made global",
1285 " l create list output file1[LST]",
1286 " o create object output file1[REL]",
1287 " s create symbol output file1[SYM]",
1288 " p disable listing pagination",
1289 " f flag relocatable references by ` in listing file",
1290 " ff flag relocatable references by mode in listing file",
1291 "-I<dir> Add the named directory to the include file",
1292 " search path. This option may be used more than once.",
1293 " Directories are searched in the order given.",
1298 /*)Function VOID usage()
1300 * The function usage() outputs to the stderr device the
1301 * assembler name and version and a list of valid assembler options.
1304 * char ** dp pointer to an array of
1305 * text string pointers.
1308 * char cpu[] assembler type string
1309 * char * usetxt[] array of string pointers
1312 * VOID asexit() asmain.c
1313 * int fprintf() c_library
1316 * program is terminated
1324 fprintf(stderr, "\nASxxxx Assembler %s (%s)\n\n", VERSION, cpu);
1325 for (dp = usetxt; *dp; dp++)
1326 fprintf(stderr, "%s\n", *dp);