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   1 /* lkmain.c */
   2
   3 /*
   4  * (C) Copyright 1989-1995
   5  * All Rights Reserved
   6  *
   7  * Alan R. Baldwin
   8  * 721 Berkeley St.
   9  * Kent, Ohio  44240
  10  *
  11  * 31-Oct-97 JLH:
  12  *           - add jflag and jfp to control NoICE output file genration
  13  *  3-Nov-97 JLH:
  14  *           - use a_type == 0 as "virgin area" flag: set == 1 if -b
  15  */
  16
  17 #include <stdlib.h>
  18 #include <stdio.h>
  19 #include <string.h>
  20 #include "aslink.h"
  21
  22 /* yuck - but including unistd.h causes problems on Cygwin by redefining
  23  * Addr_T.
  24  */
  25 extern int unlink(const char *);
  26
  27 /*)Module       lkmain.c
  28  *
  29  *      The module lkmain.c contains the functions which
  30  *      (1) input the linker options, parameters, and specifications
  31  *      (2) perform a two pass link
  32  *      (3) produce the appropriate linked data output and/or
  33  *          link map file and/or relocated listing files.
  34  *
  35  *      lkmain.c contains the following functions:
  36  *              FILE *  afile(fn,ft,wf)
  37  *              VOID    bassav()
  38  *              VOID    gblsav()
  39   *             VOID    link_main()
  40  *              VOID    lkexit()
  41  *              VOID    main(argc,argv)
  42  *              VOID    map()
  43  *              int     parse()
  44  *              VOID    setbas()
  45  *              VOID    setgbl()
  46  *              VOID    usage()
  47  *
  48  *      lkmain.c contains the following local variables:
  49  *              char *  usetext[]       array of pointers to the
  50  *                                      command option tect lines
  51  *
  52  */
  53
  54 /*JCF:  Creates some of the default areas so they are allocated in the right order.*/
  55 void Areas51 (void)
  56 {
  57         char * rel[]={
  58                 "XH",
  59                 "H 7 areas 0 global symbols",
  60                 "A _CODE size 0 flags 0",               /*Each .rel has one, so...*/
  61                 "A REG_BANK_0 size 0 flags 4",  /*Register banks are overlayable*/
  62                 "A REG_BANK_1 size 0 flags 4",
  63                 "A REG_BANK_2 size 0 flags 4",
  64                 "A REG_BANK_3 size 0 flags 4",
  65                 "A BSEG size 0 flags 80",               /*BSEG must be just before BITS*/
  66                 "A BSEG_BYTES size 0 flags 0",  /*Size will be obtained from BSEG in lnkarea()*/
  67                 ""
  68         };
  69         int j;
  70
  71         for (j=0; rel[j][0]!=0; j++)
  72         {
  73                 ip=rel[j];
  74                 link_main();
  75         }
  76
  77         /*Set the start address of the default areas:*/
  78         for(ap=areap; ap; ap=ap->a_ap)
  79         {
  80                 /**/ if (!strcmp(ap->a_id, "REG_BANK_0")) { ap->a_addr=0x00; ap->a_type=1; }
  81                 else if (!strcmp(ap->a_id, "REG_BANK_1")) { ap->a_addr=0x08; ap->a_type=1; }
  82                 else if (!strcmp(ap->a_id, "REG_BANK_2")) { ap->a_addr=0x10; ap->a_type=1; }
  83                 else if (!strcmp(ap->a_id, "REG_BANK_3")) { ap->a_addr=0x18; ap->a_type=1; }
  84                 else if (!strcmp(ap->a_id, "BSEG_BYTES")) { ap->a_addr=0x20; ap->a_type=1; }
  85         }
  86 }
  87
  88 /*)Function     VOID    main(argc,argv)
  89  *
  90  *              int     argc            number of command line arguments + 1
  91  *              char *  argv[]          array of pointers to the command line
  92  *                                      arguments
  93  *
  94  *      The function main() evaluates the command line arguments to
  95  *      determine if the linker parameters are to input through 'stdin'
  96  *      or read from a command file.  The functiond getline() and parse()
  97  *      are to input and evaluate the linker parameters.  The linking process
  98  *      proceeds by making the first pass through each .rel file in the order
  99  *      presented to the linker.  At the end of the first pass the setbase(),
 100  *      lnkarea(), setgbl(), and symdef() functions are called to evaluate
 101  *      the base address terms, link all areas, define global variables,
 102  *      and look for undefined symbols.  Following these routines a linker
 103  *      map file may be produced and the linker output files may be opened.
 104  *      The second pass through the .rel files will output the linked data
 105  *      in one of the four supported formats.
 106  *
 107  *      local variables:
 108  *              char *  p               pointer to an argument string
 109  *              int     c               character from argument string
 110  *              int     i               loop counter
 111  *
 112  *      global variables:
 113  *                                              text line in ib[]
 114  *              lfile   *cfp            The pointer *cfp points to the
 115  *                                              current lfile structure
 116  *              char    ctype[]         array of character types, one per
 117  *                                              ASCII character
 118  *              lfile   *filep                  The pointer *filep points to the
 119  *                                              beginning of a linked list of
 120  *                                              lfile structures.
 121  *              head    *hp             Pointer to the current
 122  *                                              head structure
 123  *              char    ib[NINPUT]      .rel file text line
 124  *              char    *ip             pointer into the .rel file
 125  *              lfile   *linkp          pointer to first lfile structure
 126  *                                              containing an input .rel file
 127  *                                              specification
 128  *              int     lkerr           error flag
 129  *              int     mflag           Map output flag
 130  *              int     oflag           Output file type flag
 131  *              FILE    *ofp            Output file handle
 132  *                                              for word formats
 133  *              FILE    *ofph           Output file handle
 134  *                                              for high byte format
 135  *              FILE    *ofpl           Output file handle
 136  *                                              for low byte format
 137  *              int     pass            linker pass number
 138  *              int     pflag           print linker command file flag
 139  *              int     radix           current number conversion radix
 140  *              FILE    *sfp            The file handle sfp points to the
 141  *                                              currently open file
 142  *              lfile   *startp         asmlnk startup file structure
 143  *              FILE *  stdin           c_library
 144  *              FILE *  stdout          c_library
 145  *
 146  *      functions called:
 147  *              FILE *  afile()         lkmain.c
 148  *              int     fclose()        c_library
 149  *              int     fprintf()       c_library
 150  *              int     getline()       lklex.c
 151  *              VOID    library()       lklibr.c
 152  *              VOID    link_main()     lkmain.c
 153  *              VOID    lkexit()        lkmain.c
 154  *              VOID    lnkarea()       lkarea.c
 155  *              VOID    map()           lkmain.c
 156  *              VOID    new()           lksym.c
 157  *              int     parse()         lkmain.c
 158  *              VOID    reloc()         lkreloc.c
 159  *              VOID    search()        lklibr.c
 160  *              VOID    setbas()        lkmain.c
 161  *              VOID    setgbl()        lkmain.c
 162  *              VOID    symdef()        lksym.c
 163  *              VOID    usage()         lkmain.c
 164  *
 165  *      side effects:
 166  *              Completion of main() completes the linking process
 167  *              and may produce a map file (.map) and/or a linked
 168  *              data files (.ihx or .s19) and/or one or more
 169  *              relocated listing files (.rst).
 170  */
 171
 172 int
 173 main(argc, argv)
 174 char *argv[];
 175 {
 176         register char *p;
 177         register int c, i;
 178
 179         startp = (struct lfile *) new (sizeof (struct lfile));
 180
 181         pflag = 1;
 182         for (i=1; i<argc; ++i) {
 183                 p = argv[i];
 184                 if (*p == '-') {
 185                         while (ctype[c = *(++p)] & LETTER) {
 186                                 switch(c) {
 187
 188                                 case 'c':
 189                                 case 'C':
 190                                         startp->f_type = F_STD;
 191                                         break;
 192
 193                                 case 'f':
 194                                 case 'F':
 195                                         startp->f_type = F_LNK;
 196                                         break;
 197
 198                                 case 'n':
 199                                 case 'N':
 200                                         pflag = 0;
 201                                         break;
 202
 203                                 case 'p':
 204                                 case 'P':
 205                                         pflag = 1;
 206                                         break;
 207
 208                                 default:
 209                                         usage();
 210                                 }
 211                         }
 212                 } else {
 213                         if (startp->f_type == F_LNK) {
 214                                 startp->f_idp = p;
 215                         }
 216                 }
 217         }
 218        if (startp->f_type == 0)
 219                 usage();
 220         if (startp->f_type == F_LNK && startp->f_idp == NULL)
 221                 usage();
 222
 223         cfp = NULL;
 224         sfp = NULL;
 225         filep = startp;
 226         while (1) {
 227                 ip = ib;
 228                 if (getline() == 0)
 229                         break;
 230                 if (pflag && sfp != stdin)
 231                         fprintf(stdout, "%s\n", ip);
 232                if (*ip == '\0' || parse())
 233                         break;
 234         }
 235
 236         if (sfp) {
 237             fclose(sfp);
 238             sfp = NULL;
 239         }
 240
 241         if (linkp == NULL)
 242                 usage();
 243
 244         syminit();
 245
 246         if (dflag){
 247             dfp = afile("temp", "cdb", 1);
 248             if (dfp == NULL)
 249                 lkexit(1);
 250         }
 251
 252         for (pass=0; pass<2; ++pass) {
 253                 cfp = NULL;
 254                 sfp = NULL;
 255                 filep = linkp;
 256                 hp = NULL;
 257                 radix = 10;
 258
 259                 Areas51(); /*JCF: Create the default 8051 areas in the right order*/
 260
 261                 while (getline()) {
 262                         ip = ib;
 263
 264                         /* pass any "magic comments" to NoICE output */
 265                         if ((ip[0] == ';') && (ip[1] == '!') && jfp) {
 266                                 fprintf( jfp, "%s\n", &ip[2] );
 267                         }
 268                         link_main();
 269                 }
 270                 if (pass == 0) {
 271                         /*
 272                          * Search libraries for global symbols
 273                          */
 274                         search();
 275                         /*
 276                          * Set area base addresses.
 277                          */
 278                         setbas();
 279                         /*
 280                          * Link all area addresses.
 281                          */
 282                         lnkarea();
 283                         /*
 284                          * Process global definitions.
 285                          */
 286                         setgbl();
 287                         /*
 288                          * Check for undefined globals.
 289                          */
 290                         symdef(stderr);
 291
 292                         /* Open NoICE output file if requested */
 293                         if (jflag) {
 294                                 jfp = afile(linkp->f_idp, "NOI", 1);
 295                                 if (jfp == NULL) {
 296                                         lkexit(1);
 297                                 }
 298                         }
 299
 300                         /*
 301                          * Output Link Map if requested,
 302                          * or if NoICE output requested (since NoICE
 303                          * file is generated in part by map() processing)
 304                          */
 305                         if (mflag || jflag)
 306                                 map();
 307
 308                         if (sflag) /*JCF: memory usage summary output*/
 309                                 if(summary(areap))lkexit(1);
 310
 311                         if (iram_size)
 312                                 iramcheck();
 313
 314                         /*
 315                          * Open output file
 316                          */
 317                         if (oflag == 1) {
 318                                 ofp = afile(linkp->f_idp, "ihx", 1);
 319                                 if (ofp == NULL) {
 320                                         lkexit(1);
 321                                 }
 322                                 /* include NoICE command to load hex file */
 323                                 if (jfp) fprintf( jfp, "LOAD %s.IHX\n", linkp->f_idp );
 324
 325                         } else
 326                         if (oflag == 2) {
 327                                 ofp = afile(linkp->f_idp, "S19", 1);
 328                                 if (ofp == NULL) {
 329                                         lkexit(1);
 330                                 }
 331                                 /* include NoICE command to load hex file */
 332                                 if (jfp) fprintf( jfp, "LOAD %s.S19\n", linkp->f_idp );
 333                         }
 334                 } else {
 335                         /*
 336                          * Link in library files
 337                          */
 338                         library();
 339                         reloc('E');
 340                 }
 341         }
 342         lkexit(lkerr);
 343         return 0;
 344 }
 345
 346 /*)Function     VOID    lkexit(i)
 347  *
 348  *                      int     i       exit code
 349  *
 350  *      The function lkexit() explicitly closes all open
 351  *      files and then terminates the program.
 352  *
 353  *      local variables:
 354  *              none
 355  *
 356  *      global variables:
 357  *              FILE *  mfp             file handle for .map
 358  *              FILE *  ofp             file handle for .ihx/.s19
 359  *              FILE *  rfp             file hanlde for .rst
 360  *              FILE *  sfp             file handle for .rel
 361  *              FILE *  tfp             file handle for .lst
 362  *
 363  *      functions called:
 364  *              int     fclose()        c_library
 365  *              VOID    exit()          c_library
 366  *
 367  *      side effects:
 368  *              All files closed. Program terminates.
 369  */
 370
 371 VOID
 372 lkexit(i)
 373 int i;
 374 {
 375         if (mfp != NULL) fclose(mfp);
 376         if (jfp != NULL) fclose(jfp);
 377         if (ofp != NULL) fclose(ofp);
 378         if (rfp != NULL) fclose(rfp);
 379         if (sfp != NULL) fclose(sfp);
 380         if (tfp != NULL) fclose(tfp);
 381         if (dfp != NULL) {
 382             FILE *xfp = afile(linkp->f_idp,"cdb",1);
 383             dfp = freopen("temp.cdb","r",dfp);
 384             copyfile(xfp,dfp);
 385             fclose(xfp);
 386             fclose(dfp);
 387             unlink("temp.cdb");
 388         }
 389         exit(i);
 390 }
 391
 392 /*)Function     link_main()
 393  *
 394  *      The function link_main() evaluates the directives for each line of
 395  *      text read from the .rel file(s).  The valid directives processed
 396  *      are:
 397  *              X, D, Q, H, M, A, S, T, R, and P.
 398  *
 399  *      local variables:
 400  *              int     c               first non blank character of a line
 401  *
 402  *      global variables:
 403  *              head    *headp          The pointer to the first
 404  *                                              head structure of a linked list
 405  *              head    *hp             Pointer to the current
 406  *                                              head structure
 407  *              int     pass            linker pass number
 408  *              int     radix           current number conversion radix
 409  *
 410  *      functions called:
 411  *              char    endline()       lklex.c
 412  *              VOID    module()        lkhead.c
 413  *              VOID    newarea()       lkarea.c
 414  *              VOID    newhead()       lkhead.c
 415  *              sym *   newsym()        lksym.c
 416  *              VOID    reloc()         lkreloc.c
 417  *
 418  *      side effects:
 419  *              Head, area, and symbol structures are created and
 420  *              the radix is set as the .rel file(s) are read.
 421  */
 422
 423 VOID
 424 link_main()
 425 {
 426         register int c;
 427
 428         if ((c=endline()) == 0) { return; }
 429         switch (c) {
 430
 431         case 'X':
 432                 radix = 16;
 433                 break;
 434
 435         case 'D':
 436                 radix = 10;
 437                 break;
 438
 439         case 'Q':
 440                 radix = 8;
 441                 break;
 442
 443         case 'H':
 444                 if (pass == 0) {
 445                         newhead();
 446                 } else {
 447                         if (hp == 0) {
 448                                 hp = headp;
 449                         } else {
 450                                 hp = hp->h_hp;
 451                         }
 452                 }
 453                 sdp.s_area = NULL;
 454                 sdp.s_areax = NULL;
 455                 sdp.s_addr = 0;
 456                 // jwk lastExtendedAddress = -1;
 457                 break;
 458
 459         case 'M':
 460                 if (pass == 0)
 461                         module();
 462                 break;
 463
 464         case 'A':
 465                 if (pass == 0)
 466                         newarea();
 467                 if (sdp.s_area == NULL) {
 468                         sdp.s_area = areap;
 469                         sdp.s_areax = areap->a_axp;
 470                         sdp.s_addr = 0;
 471                 }
 472                 break;
 473
 474         case 'S':
 475                 if (pass == 0)
 476                         newsym();
 477                 break;
 478
 479         case 'T':
 480         case 'R':
 481         case 'P':
 482                 if (pass == 0)
 483                         break;
 484                 reloc(c);
 485                 break;
 486
 487         default:
 488                 break;
 489         }
 490         if (c == 'X' || c == 'D' || c == 'Q') {
 491                 if ((c = get()) == 'H') {
 492                         hilo = 1;
 493                 } else
 494                 if (c == 'L') {
 495                         hilo = 0;
 496                 }
 497         }
 498 }
 499
 500
 501 /*)Function     VOID    map()
 502  *
 503  *      The function map() opens the output map file and calls the various
 504  *      routines to
 505  *      (1) output the variables in each area,
 506  *      (2) list the files processed with module names,
 507  *      (3) list the libraries file processed,
 508  *      (4) list base address definitions,
 509  *      (5) list global variable definitions, and
 510  *      (6) list any undefined variables.
 511  *
 512  *      local variables:
 513  *              int             i               counter
 514  *              head *  hdp             pointer to head structure
 515  *              lbfile *lbfh            pointer to library file structure
 516  *
 517  *      global variables:
 518  *              area    *ap             Pointer to the current
 519  *                                              area structure
 520  *              area    *areap          The pointer to the first
 521  *                                              area structure of a linked list
 522  *              base    *basep          The pointer to the first
 523  *                                              base structure
 524  *              base    *bsp            Pointer to the current
 525  *                                              base structure
 526  *              lfile   *filep                  The pointer *filep points to the
 527  *                                              beginning of a linked list of
 528  *                                              lfile structures.
 529  *              globl   *globlp         The pointer to the first
 530  *                                              globl structure
 531  *              globl   *gsp            Pointer to the current
 532  *                                              globl structure
 533  *              head    *headp          The pointer to the first
 534  *                                              head structure of a linked list
 535  *              lbfile  *lbfhead        The pointer to the first
 536  *                                      lbfile structure of a linked list
 537  *              lfile   *linkp          pointer to first lfile structure
 538  *                                              containing an input REL file
 539  *                                              specification
 540  *              int     lop             current line number on page
 541  *              FILE    *mfp            Map output file handle
 542  *              int     page            current page number
 543  *
 544  *      functions called:
 545  *              FILE *  afile()         lkmain.c
 546  *              int     fprintf()       c_library
 547  *              VOID    lkexit()        lkmain.c
 548  *              VOID    lstarea()       lklist.c
 549  *              VOID    newpag()        lklist.c
 550  *              VOID    symdef()        lksym.c
 551  *
 552  *      side effects:
 553  *              The map file is created.
 554  */
 555
 556 VOID
 557 map()
 558 {
 559         register int i;
 560         register struct head *hdp;
 561         register struct lbfile *lbfh;
 562
 563         /*
 564          * Open Map File
 565          */
 566         mfp = afile(linkp->f_idp, "map", 1);
 567         if (mfp == NULL) {
 568                 lkexit(1);
 569         }
 570
 571         /*
 572          * Output Map Area Lists
 573          */
 574         page = 0;
 575         lop  = NLPP;
 576         ap = areap;
 577         while (ap) {
 578                 lstarea(ap);
 579                 ap = ap->a_ap;
 580         }
 581         /*
 582          * List Linked Files
 583          */
 584         newpag(mfp);
 585         fprintf(mfp, "\nFiles Linked      [ module(s) ]\n\n");
 586         hdp = headp;
 587         filep = linkp;
 588         while (filep) {
 589                 fprintf(mfp, "%-16s", filep->f_idp);
 590                 i = 0;
 591                 while ((hdp != NULL) && (hdp->h_lfile == filep)) {
 592                         if (i % 5) {
 593                             fprintf(mfp, ", %8.8s", hdp->m_id);
 594                         } else {
 595                             if (i) {
 596                                 fprintf(mfp, ",\n%20s%8.8s", "", hdp->m_id);
 597                             } else {
 598                                 fprintf(mfp, "  [ %8.8s", hdp->m_id);
 599                             }
 600                         }
 601                         hdp = hdp->h_hp;
 602                         i++;
 603                 }
 604                 if (i)
 605                         fprintf(mfp, " ]");
 606                 fprintf(mfp, "\n");
 607                 filep = filep->f_flp;
 608         }
 609         /*
 610          * List Linked Libraries
 611          */
 612         if (lbfhead != NULL) {
 613                 fprintf(mfp,
 614         "\nLibraries Linked                    [   object  file   ]\n\n");
 615                 for (lbfh=lbfhead; lbfh; lbfh=lbfh->next) {
 616                         fprintf(mfp, "%-32s    [ %16.16s ]\n",
 617                                 lbfh->libspc, lbfh->relfil);
 618                 }
 619                 fprintf(mfp, "\n");
 620         }
 621         /*
 622          * List Base Address Definitions
 623          */
 624         if (basep) {
 625                 newpag(mfp);
 626                 fprintf(mfp, "\nUser Base Address Definitions\n\n");
 627                 bsp = basep;
 628                 while (bsp) {
 629                         fprintf(mfp, "%s\n", bsp->b_strp);
 630                         bsp = bsp->b_base;
 631                 }
 632         }
 633         /*
 634          * List Global Definitions
 635          */
 636         if (globlp) {
 637                 newpag(mfp);
 638                 fprintf(mfp, "\nUser Global Definitions\n\n");
 639                 gsp = globlp;
 640                 while (gsp) {
 641                         fprintf(mfp, "%s\n", gsp->g_strp);
 642                         gsp = gsp->g_globl;
 643                 }
 644         }
 645         fprintf(mfp, "\n\f");
 646         symdef(mfp);
 647 }
 648
 649 /*)Function     int     parse()
 650  *
 651  *      The function parse() evaluates all command line or file input
 652  *      linker directives and updates the appropriate variables.
 653  *
 654  *      local variables:
 655  *              int     c               character value
 656  *              char    fid[]           file id string
 657  *
 658  *      global variables:
 659  *              char    ctype[]         array of character types, one per
 660  *                                              ASCII character
 661  *              lfile   *lfp            pointer to current lfile structure
 662  *                                              being processed by parse()
 663  *              lfile   *linkp          pointer to first lfile structure
 664  *                                              containing an input REL file
 665  *                                              specification
 666  *              int     mflag           Map output flag
 667  *              int     oflag           Output file type flag
 668  *              int     pflag           print linker command file flag
 669  *              FILE *  stderr          c_library
 670  *              int     uflag           Relocated listing flag
 671  *              int     xflag           Map file radix type flag
 672  *
 673  *      Functions called:
 674  *              VOID    addlib()        lklibr.c
 675  *              VOID    addpath()       lklibr.c
 676  *              VOID    bassav()        lkmain.c
 677  *              int     fprintf()       c_library
 678  *              VOID    gblsav()        lkmain.c
 679  *              VOID    getfid()        lklex.c
 680  *              char    getnb()         lklex.c
 681  *              VOID    lkexit()        lkmain.c
 682  *              char *  strcpy()        c_library
 683  *              int     strlen()        c_library
 684  *
 685  *      side effects:
 686  *              Various linker flags are updated and the linked
 687  *              structure lfile is created.
 688  */
 689
 690 int
 691 parse()
 692 {
 693         register int c;
 694         char fid[NINPUT];
 695
 696         while ((c = getnb()) != 0) {
 697                 if ( c == '-') {
 698                         while (ctype[c=get()] & LETTER) {
 699                                 switch(c) {
 700
 701                                 case 'i':
 702                                 case 'I':
 703                                         oflag = 1;
 704                                         break;
 705
 706                                 case 's':
 707                                 case 'S':
 708                                         oflag = 2;
 709                                         break;
 710
 711                                 case 'm':
 712                                 case 'M':
 713                                         ++mflag;
 714                                         break;
 715
 716                                 case 'y': /*JCF: memory usage summary output*/
 717                                 case 'Y':
 718                                         ++sflag;
 719                                         break;
 720
 721                                 case 'j':
 722                                 case 'J':
 723                                         jflag = 1;
 724                                         break;
 725
 726                                 case 'u':
 727                                 case 'U':
 728                                         uflag = 1;
 729                                         break;
 730                                 case 'r':
 731                                 case 'R':
 732                                         rflag = 1;
 733                                         break;
 734                                 case 'x':
 735                                 case 'X':
 736                                         xflag = 0;
 737                                         break;
 738
 739                                 case 'q':
 740                                 case 'Q':
 741                                         xflag = 1;
 742                                         break;
 743
 744                                 case 'd':
 745                                 case 'D':
 746                                         xflag = 2;
 747                                         break;
 748
 749                                 case 'e':
 750                                 case 'E':
 751                                         return(1);
 752
 753                                 case 'n':
 754                                 case 'N':
 755                                         pflag = 0;
 756                                         break;
 757
 758                                 case 'p':
 759                                 case 'P':
 760                                         pflag = 1;
 761                                         break;
 762
 763                                 case 'b':
 764                                 case 'B':
 765                                         bassav();
 766                                         return(0);
 767
 768                                 case 'g':
 769                                 case 'G':
 770                                         gblsav();
 771                                         return(0);
 772
 773                                 case 'k':
 774                                 case 'K':
 775                                         addpath();
 776                                         return(0);
 777
 778                                 case 'l':
 779                                 case 'L':
 780                                         addlib();
 781                                         return(0);
 782
 783                                 case 'a':
 784                                 case 'A':
 785                                         iramsav();
 786                                         return(0);
 787
 788                                 case 'z':
 789                                 case 'Z':
 790                                         dflag = 1;
 791                                         return(0);
 792                                 default:
 793                                         fprintf(stderr, "Invalid option\n");
 794                                         lkexit(1);
 795                                 }
 796                         }
 797                 } else
 798                if (ctype[c] & ILL) {
 799                        fprintf(stderr, "Invalid input");
 800                        lkexit(1);
 801                } else {
 802                         if (linkp == NULL) {
 803                                 linkp = (struct lfile *)
 804                                         new (sizeof (struct lfile));
 805                                 lfp = linkp;
 806                         } else {
 807                                 lfp->f_flp = (struct lfile *)
 808                                                 new (sizeof (struct lfile));
 809                                 lfp = lfp->f_flp;
 810                         }
 811                         getfid(fid, c);
 812                         lfp->f_idp = (char *) new (strlen(fid)+1);
 813                         strcpy(lfp->f_idp, fid);
 814                         lfp->f_type = F_REL;
 815                 }
 816         }
 817         return(0);
 818 }
 819
 820 /*)Function     VOID    bassav()
 821  *
 822  *      The function bassav() creates a linked structure containing
 823  *      the base address strings input to the linker.
 824  *
 825  *      local variables:
 826  *              none
 827  *
 828  *      global variables:
 829  *              base    *basep          The pointer to the first
 830  *                                              base structure
 831  *              base    *bsp            Pointer to the current
 832  *                                              base structure
 833  *              char    *ip             pointer into the REL file
 834  *                                              text line in ib[]
 835  *
 836  *       functions called:
 837  *              char    getnb()         lklex.c
 838  *              VOID *  new()           lksym.c
 839  *              int     strlen()        c_library
 840  *              char *  strcpy()        c_library
 841  *              VOID    unget()         lklex.c
 842  *
 843  *      side effects:
 844  *              The basep structure is created.
 845  */
 846
 847 VOID
 848 bassav()
 849 {
 850         if (basep == NULL) {
 851                 basep = (struct base *)
 852                         new (sizeof (struct base));
 853                 bsp = basep;
 854         } else {
 855                 bsp->b_base = (struct base *)
 856                                 new (sizeof (struct base));
 857                 bsp = bsp->b_base;
 858         }
 859         unget(getnb());
 860         bsp->b_strp = (char *) new (strlen(ip)+1);
 861         strcpy(bsp->b_strp, ip);
 862 }
 863
 864 /*)Function     VOID    setbas()
 865  *
 866  *      The function setbas() scans the base address lines in hte
 867  *      basep structure, evaluates the arguments, and sets beginning
 868  *      address of the specified areas.
 869  *
 870  *      local variables:
 871  *              int     v               expression value
 872  *              char    id[]            base id string
 873  *
 874  *      global variables:
 875  *              area    *ap             Pointer to the current
 876  *                                              area structure
 877  *              area    *areap          The pointer to the first
 878  *                                              area structure of a linked list
 879  *              base    *basep          The pointer to the first
 880  *                                              base structure
 881  *              base    *bsp            Pointer to the current
 882  *                                              base structure
 883  *              char    *ip             pointer into the REL file
 884  *                                              text line in ib[]
 885  *              int     lkerr           error flag
 886  *
 887  *       functions called:
 888  *              Addr_T  expr()          lkeval.c
 889  *              int     fprintf()       c_library
 890  *              VOID    getid()         lklex.c
 891  *              char    getnb()         lklex.c
 892  *              int     symeq()         lksym.c
 893  *
 894  *      side effects:
 895  *              The base address of an area is set.
 896  */
 897
 898 VOID
 899 setbas()
 900 {
 901         register int v;
 902         char id[NCPS];
 903
 904         bsp = basep;
 905         while (bsp) {
 906                 ip = bsp->b_strp;
 907                 getid(id, -1);
 908                 if (getnb() == '=') {
 909                         v = expr(0);
 910                         for (ap = areap; ap != NULL; ap = ap->a_ap) {
 911                                 if (symeq(id, ap->a_id))
 912                                         break;
 913                         }
 914                         if (ap == NULL) {
 915                                 fprintf(stderr,
 916                                 "No definition of area %s\n", id);
 917                                 lkerr++;
 918                         } else {
 919                                 ap->a_addr = v;
 920                                 ap->a_type = 1; /* JLH: value set */
 921                         }
 922                 } else {
 923                         fprintf(stderr, "No '=' in base expression");
 924                         lkerr++;
 925                 }
 926                 bsp = bsp->b_base;
 927         }
 928 }
 929
 930 /*)Function     VOID    gblsav()
 931  *
 932  *      The function gblsav() creates a linked structure containing
 933  *      the global variable strings input to the linker.
 934  *
 935  *      local variable:
 936  *              none
 937  *
 938  *      global variables:
 939  *              globl   *globlp         The pointer to the first
 940  *                                              globl structure
 941  *              globl   *gsp            Pointer to the current
 942  *                                              globl structure
 943  *              char    *ip             pointer into the REL file
 944  *                                              text line in ib[]
 945  *              int     lkerr           error flag
 946  *
 947  *      functions called:
 948  *              char    getnb()         lklex.c
 949  *              VOID *  new()           lksym.c
 950  *              int     strlen()        c_library
 951  *              char *  strcpy()        c_library
 952  *              VOID    unget()         lklex.c
 953  *
 954  *      side effects:
 955  *              The globlp structure is created.
 956  */
 957
 958 VOID
 959 gblsav()
 960 {
 961         if (globlp == NULL) {
 962                 globlp = (struct globl *)
 963                         new (sizeof (struct globl));
 964                 gsp = globlp;
 965         } else {
 966                 gsp->g_globl = (struct globl *)
 967                                 new (sizeof (struct globl));
 968                 gsp = gsp->g_globl;
 969         }
 970         unget(getnb());
 971         gsp->g_strp = (char *) new (strlen(ip)+1);
 972         strcpy(gsp->g_strp, ip);
 973 }
 974
 975 /*)Function     VOID    setgbl()
 976  *
 977  *      The function setgbl() scans the global variable lines in hte
 978  *      globlp structure, evaluates the arguments, and sets a variable
 979  *      to this value.
 980  *
 981  *      local variables:
 982  *              int     v               expression value
 983  *              char    id[]            base id string
 984  *              sym *   sp              pointer to a symbol structure
 985  *
 986  *      global variables:
 987  *              char    *ip             pointer into the REL file
 988  *                                              text line in ib[]
 989  *              globl   *globlp         The pointer to the first
 990  *                                              globl structure
 991  *              globl   *gsp            Pointer to the current
 992  *                                              globl structure
 993  *              FILE *  stderr          c_library
 994  *              int     lkerr           error flag
 995  *
 996  *       functions called:
 997  *              Addr_T  expr()          lkeval.c
 998  *              int     fprintf()       c_library
 999  *              VOID    getid()         lklex.c
1000  *              char    getnb()         lklex.c
1001  *              sym *   lkpsym()        lksym.c
1002  *
1003  *      side effects:
1004  *              The value of a variable is set.
1005  */
1006
1007 VOID
1008 setgbl()
1009 {
1010         register int v;
1011         register struct sym *sp;
1012         char id[NCPS];
1013
1014         gsp = globlp;
1015         while (gsp) {
1016                 ip = gsp->g_strp;
1017                 getid(id, -1);
1018                 if (getnb() == '=') {
1019                         v = expr(0);
1020                         sp = lkpsym(id, 0);
1021                         if (sp == NULL) {
1022                                 fprintf(stderr,
1023                                 "No definition of symbol %s\n", id);
1024                                 lkerr++;
1025                         } else {
1026                                 if (sp->s_flag & S_DEF) {
1027                                         fprintf(stderr,
1028                                         "Redefinition of symbol %s\n", id);
1029                                         lkerr++;
1030                                         sp->s_axp = NULL;
1031                                 }
1032                                 sp->s_addr = v;
1033                                 sp->s_type |= S_DEF;
1034                         }
1035                 } else {
1036                         fprintf(stderr, "No '=' in global expression");
1037                         lkerr++;
1038                 }
1039                 gsp = gsp->g_globl;
1040         }
1041 }
1042
1043 /*)Function     FILE *  afile(fn,, ft, wf)
1044  *
1045  *              char *  fn              file specification string
1046  *              char *  ft              file type string
1047  *              int     wf              read(0)/write(1) flag
1048  *
1049  *      The function afile() opens a file for reading or writing.
1050  *              (1)     If the file type specification string ft
1051  *                      is not NULL then a file specification is
1052  *                      constructed with the file path\name in fn
1053  *                      and the extension in ft.
1054  *              (2)     If the file type specification string ft
1055  *                      is NULL then the file specification is
1056  *                      constructed from fn.  If fn does not have
1057  *                      a file type then the default .rel file
1058  *                      type is appended to the file specification.
1059  *
1060  *      afile() returns a file handle for the opened file or aborts
1061  *      the assembler on an open error.
1062  *
1063  *      local variables:
1064  *              int     c               character value
1065  *              char    fb[]            constructed file specification string
1066  *              FILE *  fp              filehandle for opened file
1067  *              char *  p1              pointer to filespec string fn
1068  *              char *  p2              pointer to filespec string fb
1069  *              char *  p3              pointer to filetype string ft
1070  *
1071  *      global variables:
1072  *              int     lkerr           error flag
1073  *
1074  *      functions called:
1075  *              FILE *  fopen()         c_library
1076  *              int     fprintf()       c_library
1077  *
1078  *      side effects:
1079  *              File is opened for read or write.
1080  */
1081
1082 FILE *
1083 afile(fn, ft, wf)
1084 char *fn;
1085 char *ft;
1086 {
1087         register char *p1, *p2, *p3;
1088         register int c;
1089         FILE *fp;
1090         char fb[PATH_MAX];
1091         char *omode = (wf ? (wf == 2 ? "a" : "w") : "r");
1092
1093         p1 = fn;
1094         p2 = fb;
1095         p3 = ft;
1096         while ((c = *p1++) != 0 && c != FSEPX) {
1097                 if (p2 < &fb[PATH_MAX-4])
1098                         *p2++ = c;
1099         }
1100         *p2++ = FSEPX;
1101         if (*p3 == 0) {
1102                 if (c == FSEPX) {
1103                         p3 = p1;
1104                 } else {
1105                         p3 = "rel";
1106                 }
1107         }
1108         while ((c = *p3++) != 0) {
1109                 if (p2 < &fb[PATH_MAX-1])
1110                         *p2++ = c;
1111         }
1112         *p2++ = 0;
1113         if ((fp = fopen(fb, omode)) == NULL) {
1114             if (strcmp(ft,"cdb")) {
1115                 fprintf(stderr, "%s: cannot %s.\n", fb, wf?"create":"open");
1116                 lkerr++;
1117             }
1118         }
1119         return (fp);
1120 }
1121
1122 /*)Function     VOID    iramsav()
1123  *
1124  *      The function iramsav() stores the size of the chip's internal RAM.
1125  *      This is used after linking to check that variable assignment to this
1126  *      dataspace didn't overflow into adjoining segments.  Variables in the
1127  *      DSEG, OSEG, and ISEG are assigned to this dataspace.
1128  *
1129  *      local variables:
1130  *              none
1131  *
1132  *      global variables:
1133  *              char    *ip             pointer into the REL file
1134  *                                              text line in ib[]
1135  *              unsigned int            size of chip's internal
1136  *                      iram_size               RAM segment
1137  *
1138  *       functions called:
1139  *              char    getnb()         lklex.c
1140  *              VOID    unget()         lklex.c
1141  *              Addr_T  expr()          lkeval.c
1142  *
1143  *      side effects:
1144  *              The iram_size may be modified.
1145  */
1146
1147 VOID
1148 iramsav()
1149 {
1150   unget(getnb());
1151   if (ip && *ip)
1152     //iram_size = atoi(ip);
1153     iram_size = expr(0);        /* evaluate size expression */
1154   else
1155     iram_size = 128;            /* Default is 128 (0x80) bytes */
1156 }
1157
1158 /*)Function     VOID    iramcheck()
1159  *
1160  *      The function iramcheck() is used at the end of linking to check that
1161  *      the internal RAM area wasn't overflowed by too many variable
1162  *      assignments.  Variables in the DSEG, ISEG, and OSEG are assigned to
1163  *      the chip's internal RAM.
1164  *
1165  *      local variables:
1166  *              none
1167  *
1168  *      global variables:
1169  *              unsigned int            size of chip's internal
1170  *                      iram_size               RAM segment
1171  *              struct area             linked list of memory
1172  *                      *areap                  areas
1173  *
1174  *       functions called:
1175  *
1176  *      side effects:
1177  */
1178
1179 VOID
1180 iramcheck()
1181 {
1182   register unsigned int last_addr;
1183   register struct area *ap;
1184
1185   for (ap = areap; ap; ap=ap->a_ap) {
1186     if ((ap->a_size != 0) &&
1187         (!strcmp(ap->a_id, "DSEG") ||
1188          !strcmp(ap->a_id, "OSEG") ||
1189          !strcmp(ap->a_id, "ISEG")
1190         )
1191        )
1192     {
1193       last_addr = ap->a_addr + ap->a_size - 1;
1194       if (last_addr >= iram_size)
1195         fprintf(stderr,
1196                 "\nWARNING! Segment %s extends past the end\n"
1197                 "         of internal RAM.  Check map file.\n",
1198                 ap->a_id);
1199     }
1200   }
1201 }
1202
1203 char *usetxt[] = {
1204         "Startup:",
1205         "  -c   Command line input",
1206         "  -f   file[LNK] File input",
1207         "  -p   Prompt and echo of file[LNK] to stdout (default)",
1208         "  -n   No echo of file[LNK] to stdout",
1209 /*      "Usage: [-Options] file [file ...]", */
1210         "Libraries:",
1211         "  -k   Library path specification, one per -k",
1212         "  -l   Library file specification, one per -l",
1213         "Relocation:",
1214         "  -b   area base address = expression",
1215         "  -g   global symbol = expression",
1216         "Map format:",
1217         "  -m   Map output generated as file[MAP]",
1218         "  -x   Hexadecimal (default),  -d  Decimal,  -q  Octal",
1219         "Output:",
1220         "  -i   Intel Hex as file[IHX]",
1221         "  -s   Motorola S19 as file[S19]",
1222         "  -j   Produce NoICE debug as file[NOI]",
1223         "  -z   Produce SDCdb debug as file[cdb]",
1224 /*      "List:", */
1225         "  -u   Update listing file(s) with link data as file(s)[.RST]",
1226         "Miscellaneous:\n"
1227         "  -a   [iram-size] Check for internal RAM overflow",
1228         "End:",
1229         "  -e   or null line terminates input",
1230         0
1231 };
1232
1233 /*)Function     VOID    usage()
1234  *
1235  *      The function usage() outputs to the stderr device the
1236  *      assembler name and version and a list of valid assembler options.
1237  *
1238  *      local variables:
1239  *              char ** dp              pointer to an array of
1240  *                                      text string pointers.
1241  *
1242  *      global variables:
1243  *              FILE *  stderr          c_library
1244  *
1245  *      functions called:
1246  *              int     fprintf()       c_library
1247  *
1248  *      side effects:
1249  *              none
1250  */
1251
1252 VOID
1253 usage()
1254 {
1255         register char   **dp;
1256
1257         fprintf(stderr, "\nASxxxx Linker %s\n\n", VERSION);
1258         for (dp = usetxt; *dp; dp++)
1259                 fprintf(stderr, "%s\n", *dp);
1260         lkexit(1);
1261 }
1262
1263 /*)Function     VOID    copyfile()
1264  *
1265  *              FILE    *dest           destination file
1266  *              FILE    *src            source file
1267  *
1268  *      function will copy source file to destination file
1269  *
1270  *
1271  *      functions called:
1272  *              int     fgetc()         c_library
1273  *              int     fputc()         c_library
1274  *
1275  *      side effects:
1276  *              none
1277  */
1278 VOID copyfile (dest,src)
1279 FILE *src,*dest ;
1280 {
1281     int ch;
1282     while ((ch = fgetc(src)) != EOF) {
1283
1284         fputc(ch,dest);
1285     }
1286 }