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