Shamusworld >> Repos - rln/blob - rln.c

   1 //
   2 // RLN - Reboot's Linker for the Atari Jaguar Console System
   3 // RLN.C - Application Code
   4 // Copyright (C) 199x, Allan K. Pratt, 2014 Reboot & Friends
   5 //
   6
   7 #include "rln.h"
   8 //#include <assert.h>
   9
  10 unsigned errflag = 0;                           // Error flag, goes TRUE on error
  11 unsigned waitflag = 0;                          // Wait for any keypress flag
  12 unsigned versflag = 0;                          // Version banner has been shown flag
  13 unsigned aflag = 0;                                     // Absolute linking flag
  14 unsigned bflag = 0;                                     // Don't remove mulitply def locals flag
  15 unsigned cflag = 0;                                     // COF executable
  16 unsigned dflag = 0;                                     // Wait for key after link flag
  17 unsigned gflag = 0;                                     // Source level debug include flag
  18 unsigned lflag = 0;                                     // Add local symbols to output flag
  19 unsigned mflag = 0;                                     // Produce symbol load map flag
  20 unsigned oflag = 0;                                     // Output filename specified
  21 unsigned rflag = 0;                                     // Segment alignment size flag
  22 unsigned sflag = 0;                                     // Output only global symbols
  23 unsigned vflag = 0;                                     // Verbose flag
  24 unsigned wflag = 0;                                     // Show warnings flag
  25 unsigned zflag = 0;                                     // Suppress banner flag
  26 unsigned pflag = 0, uflag = 0;          // Unimplemented flags
  27 unsigned hd = 0;                                        // Index of next file handle to fill
  28 unsigned secalign = 7;                          // Section Alignment (8=phrase)
  29 unsigned tbase = 0;                                     // TEXT base address
  30 unsigned dbase = 0;                                     // DATA base address
  31 unsigned bbase = 0;                                     // BSS base address
  32 unsigned textoffset = 0;                        // COF TEXT segment offset
  33 unsigned dataoffset = 0;                        // COF DATA segment offset
  34 unsigned bssoffset = 0;                         // COF BSS segment offset
  35 unsigned displaybanner = 1;                     // Display version banner
  36 unsigned symoffset = 0;                         // Symbol table offset in output file
  37 unsigned dosymi = 0;                            // Dosym() processing iterator
  38 unsigned dbgsymbase = 0;                        // Debug symbol base address
  39 //unsigned symtrunc = 0;                        // Symbol truncation -i and -ii
  40 int noheaderflag = 0;                           // No header flag for ABS files
  41 int hflags;                                                     // Value of the arg to -h option
  42 int ttype, dtype, btype;                        // Type flag: 0, -1, -2, -3, -4
  43 int tval, dval, bval;                           // Values of these abs bases
  44 int hflag[NHANDLES];                            // True for include files
  45 int handle[NHANDLES];                           // Open file handles
  46 int textsize, datasize, bsssize;        // Cumulative segment sizes
  47 char libdir[FARGSIZE * 3];                      // Library directory to search
  48 char ofile[FARGSIZE];                           // Output file name (.o)
  49 char * name[NHANDLES];                          // Associated file names
  50 char * cmdlnexec = NULL;                        // Executable name - pointer to ARGV[0]
  51 char * hsym1[SYMLEN];                           // First symbol for include files
  52 char * hsym2[SYMLEN];                           // Second symbol for include files
  53 struct OFILE * plist = NULL;            // Object image list pointer
  54 struct OFILE * plast;                           // Last object image list pointer
  55 struct OFILE * olist = NULL;            // Pointer to first object file in list
  56 struct OFILE * olast;                           // Pointer to last object file in list
  57 char obj_fname[16384][FNLEN];           // Object file names
  58 unsigned obj_segsize[16384][3];         // Object file seg sizes; TEXT,DATA,BSS
  59 unsigned obj_index = 0;                         // Object file index/count
  60 char * arPtr[512];
  61 uint32_t arIndex = 0;
  62 struct HREC * htable[NBUCKETS];         // Hash table
  63 struct HREC * unresolved = NULL;        // Pointer to unresolved hash list
  64 char * ost;                                                     // Output symbol table
  65 char * ost_ptr;                                         // Output symbol table; current pointer
  66 char * ost_end;                                         // Output symbol table; end pointer
  67 char * oststr;                                          // Output string table
  68 char * oststr_ptr;                                      // Output string table; current pointer
  69 char * oststr_end;                                      // Output string table; end pointer
  70 int ost_index = 0;                                      // Index of next ost addition
  71 uint8_t nullStr[1] = "\x00";            // Empty string
  72 struct HREC * arSymbol = NULL;          // Pointer to AR symbol table
  73
  74
  75 // Function prototypes
  76 struct HREC * LookupHREC(char *);
  77 char * PathTail(char *);
  78 void ShowHelp(void);
  79 void ShowVersion(void);
  80
  81
  82 //
  83 // Get a long word from memory
  84 //
  85 static inline uint32_t GetLong(uint8_t * src)
  86 {
  87         return (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
  88 }
  89
  90
  91 //
  92 // Put a long word into memory
  93 //
  94 static inline void PutLong(uint8_t * dest, uint32_t val)
  95 {
  96         *dest++ = (uint8_t)(val >> 24);
  97         *dest++ = (uint8_t)(val >> 16);
  98         *dest++ = (uint8_t)(val >> 8);
  99         *dest = (uint8_t)val;
 100 }
 101
 102
 103 //
 104 // Get a word from memory
 105 //
 106 static inline uint16_t GetWord(uint8_t * src)
 107 {
 108         return (src[0] << 8) | src[1];
 109 }
 110
 111
 112 //
 113 // Put a word into memory
 114 //
 115 static inline void PutWord(uint8_t * dest, uint16_t val)
 116 {
 117         *dest++ = (uint8_t)(val >> 8);
 118         *dest = (uint8_t)val;
 119 }
 120
 121
 122 //
 123 // Find passed in file's length in bytes
 124 // N.B.: This also resets the file's pointer to the start of the file
 125 //
 126 long FileSize(int fd)
 127 {
 128         long size = lseek(fd, 0, SEEK_END);
 129         lseek(fd, 0, SEEK_SET);
 130
 131         return size;
 132 }
 133
 134
 135 //
 136 // For this object file, add symbols to the output symbol table after
 137 // relocating them. Returns TRUE if OSTLookup returns an error (-1).
 138 //
 139 int DoSymbols(struct OFILE * ofile)
 140 {
 141         int type;
 142         long value;
 143         int index;
 144         int j;
 145         struct HREC * hptr;
 146         unsigned tsoSave, dsoSave, bsoSave;
 147
 148         // Point to first symbol record in the object file
 149         char * symptr = (ofile->o_image + 32
 150                 + ofile->o_header.tsize
 151                 + ofile->o_header.dsize
 152                 + ofile->o_header.absrel.reloc.tsize
 153                 + ofile->o_header.absrel.reloc.dsize);
 154
 155         // Point to end of symbol record in the object file
 156         char * symend = symptr + ofile->o_header.ssize;
 157
 158         // Search through object segment size table to accumulated segment sizes to
 159         // ensure the correct offsets are used in the resulting COF file.
 160         int ssidx = -1;
 161         unsigned tsegoffset = 0, dsegoffset = 0, bsegoffset = 0;
 162
 163         // Search for object file name
 164         for(j=0; j<(int)obj_index; j++)
 165         {
 166                 if (!strcmp(ofile->o_name, obj_fname[j]))
 167                 {
 168                         // Object file name found
 169                         ssidx = j;
 170                         break;
 171                 }
 172
 173                 // Accumulate segment sizes
 174                 tsegoffset += obj_segsize[j][0];
 175                 dsegoffset += obj_segsize[j][1];
 176                 bsegoffset += obj_segsize[j][2];
 177         }
 178
 179         if (ssidx == -1)
 180         {
 181                 printf("DoSymbols(): Object file missing from obj_fname: %s\n",
 182                         ofile->o_name);
 183                 return 1;
 184         }
 185
 186         // Save segment vars, so we can restore them if needed
 187         tsoSave = tsegoffset, dsoSave = dsegoffset, bsoSave = bsegoffset;
 188
 189         // Process each record in the object's symbol table
 190         for(; symptr!=symend; symptr+=12)
 191         {
 192                 index = GetLong(symptr + 0);    // Obtain symbol string index
 193                 type  = GetLong(symptr + 4);    // Obtain symbol type
 194                 value = GetLong(symptr + 8);    // Obtain symbol value
 195
 196                 // Global/External symbols have a pre-processing stage
 197                 // N.B.: This destroys the t/d/bsegoffset discovered above. So if a
 198                 //       local symbol follows a global/exported one, it gets wrong
 199                 //       info! [Should be FIXED now]
 200                 if (type & 0x01000000)
 201                 {
 202                         // Obtain the string table index for the relocation symbol, look
 203                         // for it in the globals hash table to obtain information on that
 204                         // symbol.
 205                         hptr = LookupHREC(symend + index);
 206
 207                         if (hptr == NULL)
 208                         {
 209                                 // Try to find it in the OST
 210                                 int ostIndex = OSTLookup(symend + index);
 211
 212                                 if (ostIndex == -1)
 213                                 {
 214                                         printf("DoSymbols(): Symbol not found in hash table: '%s' (%s)\n", symend + index, ofile->o_name);
 215                                         return 1;
 216                                 }
 217
 218                                 if (vflag > 1)
 219                                         printf("DoSymbols(): Skipping symbol '%s' (%s) found in OST...\n", symend + index, ofile->o_name);
 220
 221                                 // If the symbol is not in any .a or .o units, it must be one
 222                                 // of the injected ones (_TEXT_E, _DATA_E, or _BSS_E), so skip
 223                                 // it [or maybe not? In verbose mode, we see nothing...!]
 224                                 continue;
 225                         }
 226
 227                         // Search through object segment size table to obtain segment sizes
 228                         // for the object that has the required external/global as a local
 229                         // symbol. As each object is interrogated the segment sizes are
 230                         // accumulated to ensure the correct offsets are used in the
 231                         // resulting COF file. This is effectively 'done again' only as we
 232                         // are working with a different object file.
 233                         ssidx = -1;
 234                         tsegoffset = dsegoffset = bsegoffset = 0;
 235
 236                         // Search for object filename
 237                         for(j=0; j<(int)obj_index; j++)
 238                         {
 239                                 if (!strcmp(hptr->h_ofile->o_name, obj_fname[j]))
 240                                 {
 241                                         ssidx = j;      // Symbol object filename
 242                                         break;
 243                                 }
 244
 245                                 // Accumulate segment sizes
 246                                 tsegoffset += obj_segsize[j][0];
 247                                 dsegoffset += obj_segsize[j][1];
 248                                 bsegoffset += obj_segsize[j][2];
 249                         }
 250
 251                         if (ssidx == -1)
 252                         {
 253                                 printf("DoSymbols(): Object file missing from obj_fname: '%s:%s' symbol: '%s' (%s)\n",
 254                                         hptr->h_ofile->o_name, hptr->h_ofile->o_arname,
 255                                         symend + index, ofile->o_name);
 256                                 return 1;
 257                         }
 258
 259                         // Update type with global type
 260                         type = hptr->h_type;
 261
 262                         // Remove external flag if absolute
 263                         if (type == (T_GLBL | T_ABS))
 264                                 type = T_ABS;
 265
 266                         // If the global/external has a value then update that value in
 267                         // accordance with the segment sizes of the object file it
 268                         // originates from
 269                         if (hptr->h_value)
 270                         {
 271                                 switch (hptr->h_type & 0x0E000000)
 272                                 {
 273                                 case T_ABS:
 274                                 case T_TEXT:
 275                                         value = hptr->h_value;
 276                                         break;
 277                                 case T_DATA:
 278                                         value = hptr->h_value - hptr->h_ofile->o_header.tsize;
 279                                         break;
 280                                 case T_BSS:
 281                                         value = hptr->h_value
 282                                                 - (hptr->h_ofile->o_header.tsize
 283                                                 + hptr->h_ofile->o_header.dsize);
 284                                         break;
 285                                 default:
 286                                         if (vflag > 1)
 287                                                 printf("DoSymbols: No adjustment made for symbol: %s (%s) = %X\n", symend + index, ofile->o_name, hptr->h_value);
 288                                 }
 289                         }
 290                 }
 291                 // If *not* a global/external, use the info from passed in object
 292                 else
 293                         tsegoffset = tsoSave, dsegoffset = dsoSave, bsegoffset = bsoSave;
 294
 295                 // Process and update the value dependent on whether the symbol is a
 296                 // debug symbol or not
 297                 // N.B.: These are currently not supported
 298                 if (type & 0xF0000000)
 299                 {
 300                         // DEBUG SYMBOL
 301                         // Set the correct debug symbol base address (TEXT segment)
 302                         dbgsymbase = 0;
 303
 304                         for(j=0; (unsigned)j<dosymi; j++)
 305                                 dbgsymbase += obj_segsize[j][0];
 306
 307                         switch (type & 0xFF000000)
 308                         {
 309                         case 0x64000000:
 310                                 value = tval + dbgsymbase;
 311                                 break;
 312                         case 0x44000000:
 313                         case 0x46000000:
 314                         case 0x48000000:
 315                                 value = tval + dbgsymbase + value;
 316                         default:
 317                                 break;
 318                         }
 319
 320                         PutLong(symptr + 8, value);
 321                 }
 322                 else
 323                 {
 324                         // NON-DEBUG SYMBOL
 325                         // Now make modifications to the symbol value, local or global,
 326                         // based on the segment sizes of the object file currently being
 327                         // processed.
 328                         switch (type & T_SEG)
 329                         {
 330                         case T_ABS:
 331                                 break;
 332                         case T_TEXT:
 333                                 value = tbase + tsegoffset + value;
 334                                 PutLong(symptr + 8, value);
 335                                 break;
 336                         case T_DATA:
 337                                 if (type & T_GLBL)
 338                                         value = dbase + dsegoffset + value;
 339                                 else
 340                                         value = dbase + dsegoffset + (value
 341                                                 - ofile->o_header.tsize);
 342
 343                                 PutLong(symptr + 8, value);
 344                                 break;
 345                         case T_BSS:
 346                                 if (type & T_GLBL)
 347                                         value = bbase + bsegoffset + value;
 348                                 else
 349                                         value = bbase + bsegoffset
 350                                                 + (value - (ofile->o_header.tsize
 351                                                 + ofile->o_header.dsize));
 352
 353                                 PutLong(symptr + 8, value);
 354                                 break;
 355                         default:
 356                                 break;
 357                         }
 358                 }
 359
 360                 // Add to output symbol table if global/extern, or local flag is set
 361                 if (isglobal(type) || lflag)
 362                 {
 363                         if (vflag > 1)
 364                                 printf("DoSymbols: Adding symbol: %s (%s) to OST...\n", symend + index, ofile->o_name);
 365
 366                         index = OSTAdd(symend + index, type, value);
 367
 368                         if (index == -1)
 369                         {
 370                                 printf("DoSymbols(): Failed to add symbol '%s' to OST!\n", symend + index);
 371                                 return 1;
 372                         }
 373                 }
 374         }
 375
 376         // Increment dosymi processsing
 377         dosymi++;
 378
 379         return 0;
 380 }
 381
 382
 383 //
 384 // Free up hash memory
 385 //
 386 void FreeHashes(void)
 387 {
 388         int i;
 389
 390         for(i=0; i<NBUCKETS; i++)
 391         {
 392                 struct HREC * hptr = htable[i];
 393
 394                 while (hptr)
 395                 {
 396                         struct HREC * htemp = hptr->h_next;
 397                         free(hptr);
 398                         hptr = htemp;
 399                 }
 400         }
 401 }
 402
 403
 404 //
 405 // Add all global and external symbols to the output symbol table
 406 // [This is confusing--is it adding globals or locals? common == local!
 407 //  but then again, we see this in the header:
 408 //  #define T_COMMON  (T_GLOBAL | T_EXTERN) but that could be just bullshit.]
 409 //
 410 // Common symbols have a different number in the "value" field of the symbol
 411 // table (!0) than purely external symbols do (0). So you have to look at the
 412 // type (T_GLBL) *and* the value to determine if it's a common symbol.
 413 //
 414 long DoCommon(void)
 415 {
 416         struct HREC * hptr;
 417         int i;
 418
 419         for(i=0; i<NBUCKETS; i++)
 420         {
 421                 for(hptr=htable[i]; hptr!=NULL; hptr=hptr->h_next)
 422                 {
 423 //NO!                   if (iscommon(hptr->h_type))
 424                         if (isglobal(hptr->h_type))// || isextern(hptr->h_type))
 425                         {
 426 // Skip if in *.a file... (does nothing)
 427 //if (hptr->h_ofile->isArchiveFile)
 428 //      continue;
 429
 430 //Is this true? Couldn't an absolute be exported???
 431                                 if (hptr->h_type == (T_GLBL | T_ABS))
 432                                         hptr->h_type = T_ABS;   // Absolutes *can't* be externals
 433
 434                                 if (OSTAdd(hptr->h_sym, hptr->h_type, hptr->h_value) == -1)
 435                                         return -1;
 436                         }
 437                 }
 438         }
 439
 440         return 0;
 441 }
 442
 443
 444 //
 445 // Add a symbol's name, type, and value to the OST.
 446 // Returns the index of the symbol in OST, or -1 for error.
 447 //
 448 int OSTAdd(char * name, int type, long value)
 449 {
 450         int ost_offset_p, ost_offset_e = 0;     // OST table offsets for position calcs
 451         int ostresult;                                          // OST index result
 452         int slen = strlen(name);
 453
 454         // If the OST or OST string table has not been initialised then do so
 455         if (ost_index == 0)
 456         {
 457                 ost = malloc(OST_BLOCK);
 458                 oststr = malloc(OST_BLOCK);
 459
 460                 if (ost == NULL)
 461                 {
 462                         printf("OST memory allocation error.\n");
 463                         return -1;
 464                 }
 465
 466                 if (oststr == NULL)
 467                 {
 468                         printf("OSTSTR memory allocation error.\n");
 469                         return -1;
 470                 }
 471
 472                 ost_ptr = ost;                                          // Set OST start pointer
 473                 ost_end = ost + OST_BLOCK;                      // Set OST end pointer
 474
 475                 PutLong(oststr, 0x00000004);            // Just null long for now
 476                 oststr_ptr = oststr + 4;                        // Skip size of str table long (incl null long)
 477                 PutLong(oststr_ptr, 0x00000000);        // Null terminating long
 478                 oststr_end = oststr + OST_BLOCK;
 479         }
 480         else
 481         {
 482                 // If next symbol record exceeds current allocation then expand symbol
 483                 // table and/or symbol string table.
 484                 ost_offset_p = (ost_ptr - ost);
 485                 ost_offset_e = (ost_end - ost);
 486
 487                 // 3 x uint32_t (12 bytes)
 488                 if ((ost_ptr + 12) > ost_end)
 489                 {
 490                         // We want to allocate the current size of the OST + another block.
 491                         ost = realloc(ost, ost_offset_e + OST_BLOCK);
 492
 493                         if (ost == NULL)
 494                         {
 495                                 printf("OST memory reallocation error.\n");
 496                                 return -1;
 497                         }
 498
 499                         ost_ptr = ost + ost_offset_p;
 500                         ost_end = (ost + ost_offset_e) + OST_BLOCK;
 501                 }
 502
 503                 ost_offset_p = (oststr_ptr - oststr);
 504                 ost_offset_e = (oststr_end - oststr);
 505
 506                 // string length + terminating NULL + uint32_t (terminal long)
 507                 if ((oststr_ptr + (slen + 1 + 4)) > oststr_end)
 508                 {
 509                         oststr = realloc(oststr, ost_offset_e + OST_BLOCK);
 510
 511                         if (oststr == NULL)
 512                         {
 513                                 printf("OSTSTR memory reallocation error.\n");
 514                                 return -1;
 515                         }
 516
 517                         oststr_ptr = oststr + ost_offset_p;
 518                         oststr_end = (oststr + ost_offset_e) + OST_BLOCK;
 519                 }
 520         }
 521
 522         // If this is a debug symbol and the include debug symbol flag (-g) is not
 523         // set then do nothing
 524         if ((type & 0xF0000000) && !gflag)
 525         {
 526                 // Do nothing
 527                 return 0;
 528         }
 529
 530         // Get symbol index in OST, if any (-1 if not found)
 531         ostresult = OSTLookup(name);
 532
 533         // If the symbol is in the output symbol table and the bflag is set
 534         // (don't remove multiply defined locals) and this is not an
 535         // external/global symbol *** OR *** the symbol is not in the output
 536         // symbol table then add it.
 537         if (((ostresult != -1) && bflag && !(type & 0x01000000))
 538                 || ((ostresult != -1) && gflag && (type & 0xF0000000))
 539                 || (ostresult == -1))
 540         {
 541                 if ((type & 0xF0000000) == 0x40000000)
 542                         PutLong(ost_ptr, 0x00000000);   // Zero string table offset for dbg line
 543                 else
 544                         PutLong(ost_ptr, (oststr_ptr - oststr));        // String table offset of symbol string
 545
 546                 PutLong(ost_ptr + 4, type);
 547                 PutLong(ost_ptr + 8, value);
 548                 ost_ptr += 12;
 549
 550                 // If the symbol type is anything but a debug line information
 551                 // symbol then write the symbol string to the string table
 552                 if ((type & 0xF0000000) != 0x40000000)
 553                 {
 554                         strcpy(oststr_ptr, name);               // Put symbol name in string table
 555                         *(oststr_ptr + slen) = '\0';    // Add null terminating character
 556                         oststr_ptr += (slen + 1);
 557                         PutLong(oststr_ptr, 0x00000000);        // Null terminating long
 558                         PutLong(oststr, (oststr_ptr - oststr)); // Update size of string table
 559                 }
 560
 561                 if (vflag > 1)
 562                         printf("OSTAdd: (%s), type=$%08X, val=$%08lX\n", name, type, value);
 563
 564 // is ost_index pointing one past?
 565 // does this return the same regardless of if its ++n or n++?
 566 // no. it returns the value of ost_index *before* it's incremented.
 567                 return ++ost_index;
 568         }
 569
 570         return ostresult;
 571 }
 572
 573
 574 //
 575 // Return the index of a symbol in the output symbol table
 576 // N.B.: This is a 1-based index! (though there's no real reason for it to be)
 577 //
 578 int OSTLookup(char * sym)
 579 {
 580         int i;
 581         int stro = 4;           // Offset in string table
 582
 583         for(i=0; i<ost_index; i++)
 584         {
 585                 if (strcmp(oststr + stro, sym) == 0)
 586                         return i + 1;
 587
 588                 stro += strlen(oststr + stro) + 1;
 589         }
 590
 591         return -1;
 592 }
 593
 594
 595 //
 596 // Add unresolved externs to the output symbol table
 597 // N.B.: Only adds unresolved symbols *if* they're not already in the OST
 598 //
 599 int DoUnresolved(void)
 600 {
 601         struct HREC * hptr = unresolved;
 602
 603         // Add to OST while unresolved list is valid
 604         while (hptr != NULL)
 605         {
 606                 if (OSTAdd(hptr->h_sym, T_GLBL, 0L) == -1)
 607                         return 1;
 608
 609                 if (vflag > 1)
 610                         printf("DoUnresolved(): '%s' (%s:$%08X) in OST\n", hptr->h_sym, hptr->h_ofile->o_name, hptr->h_type);
 611
 612                 struct HREC * htemp = hptr->h_next;
 613                 free(hptr);
 614                 hptr = htemp;
 615         }
 616
 617         unresolved = NULL;
 618         return 0;
 619 }
 620
 621
 622 //
 623 // Update object file TEXT and DATA segments based on relocation records. Take
 624 // in an OFILE header and flag (T_TEXT, T_DATA) to process. Return (0) is
 625 // successful or non-zero (1) if failed.
 626 //
 627 int RelocateSegment(struct OFILE * ofile, int flag)
 628 {
 629         char * symtab;                  // Start of symbol table
 630         char * symbols;                 // Start of symbols
 631         char * sptr;                    // Start of segment data
 632         char * rptr;                    // Start of segment relocation records
 633         unsigned symidx;                // Offset to symbol
 634         unsigned addr;                  // Relocation address
 635         unsigned rflg;                  // Relocation flags
 636         unsigned olddata;               // Old segment data at reloc address
 637         unsigned newdata = 0;   // New segment data at reloc address
 638         unsigned pad;                   // Temporary to calculate phrase padding
 639         int i;                                  // Iterator
 640         char sym[SYMLEN];               // String for symbol name/hash search
 641         int ssidx;                              // Segment size table index
 642         unsigned glblreloc;             // Global relocation flag
 643         unsigned absreloc;              // Absolute relocation flag
 644         unsigned relreloc;              // Relative relocation flag
 645         unsigned swcond;                // Switch statement condition
 646         unsigned relocsize;             // Relocation record size
 647
 648         // If there is no TEXT relocation data for the selected object file segment
 649         // then update the COF TEXT segment offset allowing for the phrase padding
 650         if ((flag == T_TEXT) && !ofile->o_header.absrel.reloc.tsize)
 651         {
 652                 // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
 653                 return 0;
 654         }
 655
 656         // If there is no DATA relocation data for the selected object file segment
 657         // then update the COF DATA and BSS segment offsets allowing for the phrase
 658         // padding
 659         if ((flag == T_DATA) && !ofile->o_header.absrel.reloc.dsize)
 660         {
 661                 // SCPCD : the T_DATA is the last section of the file, we can now increment the textoffset, dataoffset and bssoffset
 662
 663                 // TEXT segment size plus padding
 664                 pad = ((ofile->o_header.tsize + secalign) & ~secalign);
 665                 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
 666
 667                 if (vflag > 1)
 668                         printf("RelocateSegment(%s, TEXT) : No relocation data\n", ofile->o_name);
 669
 670                 // DATA segment size plus padding
 671                 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
 672                 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
 673
 674                 // BSS segment size plus padding
 675                 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
 676                 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
 677
 678                 if (vflag > 1)
 679                         printf("RelocateSegment(%s, DATA) : No relocation data\n", ofile->o_name);
 680
 681                 return 0;
 682         }
 683
 684         if (vflag > 1)
 685                 printf("RelocateSegment(%s, %s) : Processing Relocation Data\n",
 686                         ofile->o_name, flag == T_DATA ? "DATA" : "TEXT");
 687
 688         // Obtain pointer to start of symbol table
 689         symtab = (ofile->o_image + 32 + ofile->o_header.tsize
 690                 + ofile->o_header.dsize
 691                 + ofile->o_header.absrel.reloc.tsize
 692                 + ofile->o_header.absrel.reloc.dsize);
 693
 694         // Obtain pointer to start of symbols
 695         symbols = symtab + ofile->o_header.ssize;
 696
 697         // Obtain pointer to start of TEXT segment
 698         sptr = ofile->o_image + 32;
 699
 700         // Obtain pointer to start of TEXT relocation records
 701         rptr = sptr + (ofile->o_header.tsize + ofile->o_header.dsize);
 702
 703         relocsize = ofile->o_header.absrel.reloc.tsize;
 704
 705     if (vflag)
 706         printf("RELOCSIZE :: %d  Records = %d\n", relocsize, relocsize / 8);
 707
 708         // Update pointers if DATA relocation records are being processed
 709         if (flag == T_DATA)
 710         {
 711                 sptr += ofile->o_header.tsize;              // Start of DATA segment
 712                 rptr += ofile->o_header.absrel.reloc.tsize; // Start of DATA relocation records
 713                 relocsize = ofile->o_header.absrel.reloc.dsize;
 714         }
 715
 716         // Process each relocation record for the TEXT segment
 717         for(i=0; i<(int)relocsize; i+=8)
 718         {
 719                 // Obtain both the relocation address and the relocation flags from the
 720                 // object file image
 721                 addr = GetLong(rptr);
 722                 rflg = GetLong(rptr + 4);
 723                 glblreloc = (rflg & 0x00000010 ? 1 : 0);// Set global relocation flag
 724                 absreloc = (rflg & 0x00000040 ? 1 : 0); // Set absolute relocation flag
 725                 relreloc = (rflg & 0x000000A0 ? 1 : 0); // Set relative relocation flag
 726
 727                 // Additional processing required for global relocations
 728                 if (glblreloc)
 729                 {
 730                         // Obtain the string table index for the relocation symbol, look
 731                         // for it in the globals hash table to obtain information on that
 732                         // symbol. For the hash calculation to work correctly it must be
 733                         // placed in a 'clean' string before looking it up.
 734                         symidx = GetLong(symtab + ((rflg >> 8) * 12));
 735                         memset(sym, 0, SYMLEN);
 736                         strcpy(sym, symbols + symidx);
 737                         olddata = newdata = 0;   // Initialise old and new segment data
 738                         ssidx = OSTLookup(sym);
 739                         newdata = GetLong(ost + ((ssidx - 1) * 12) + 8);
 740                 }
 741
 742                 // Obtain the existing long word segment data and flip words if the
 743                 // relocation flags indicate it relates to a RISC MOVEI instruction
 744                 olddata = GetLong(sptr + addr);
 745
 746                 if (rflg & 0x01)
 747                         olddata = _SWAPWORD(olddata);
 748
 749                 // Process record dependant on segment it relates to; TEXT, DATA or
 750                 // BSS. Construct a new relocated segment long word based on the
 751                 // required segment base address, the segment data offset in the
 752                 // resulting COF file and the offsets from the incoming object file.
 753                 swcond = (rflg & 0xFFFFFF00);
 754
 755                 if (!glblreloc)
 756                 {
 757                         switch (swcond)
 758                         {
 759                         case 0x00000200:          // Absolute Value
 760                                 break;
 761                         case 0x00000400:          // TEXT segment relocation record
 762                                 // SCPCD : the symbol point to a text segment, we should use the textoffset
 763                                         newdata = tbase + textoffset + olddata;
 764
 765                                 break;
 766                         case 0x00000600:          // DATA segment relocation record
 767                                 newdata = dbase + dataoffset
 768                                         + (olddata - ofile->o_header.tsize);
 769
 770                                 break;
 771                         case 0x00000800:          // BSS segment relocation record
 772                                 newdata = bbase + bssoffset
 773                                         + (olddata - (ofile->o_header.tsize
 774                                         + ofile->o_header.dsize));
 775
 776                                 break;
 777                         }
 778                 }
 779                 else
 780                 {
 781                         if (!relreloc)
 782                                 newdata += olddata;
 783                 }
 784
 785                 // Set absolute (long) or relative (word) address of symbol
 786                 if (absreloc)
 787                 {
 788                         // Flip the new long word segment data if the relocation record
 789                         // indicated a RISC MOVEI instruction and place the resulting data
 790                         // back in the COF segment
 791                         if (rflg & 0x01)
 792                                 newdata = _SWAPWORD(newdata);
 793
 794                         PutLong(sptr + addr, newdata);
 795                 }
 796                 else if (relreloc)
 797                 {
 798                         PutWord(sptr + addr, newdata - tbase - addr - ofile->o_tbase);
 799                 }
 800
 801                 // Shamus: Let's output some info to aid in debugging this crap
 802                 if (vflag > 1)
 803                 {
 804                         char ssiString[128];
 805                         ssiString[0] = 0;
 806
 807                         if (glblreloc)
 808                                 sprintf(ssiString, " [ssi:%i]", ssidx);
 809
 810                         printf("RelocateSegment($%08X): %s, $%08X: $%08X => $%08X%s\n", rflg, (glblreloc ? sym : "(LOCAL)"), addr, olddata, GetLong(sptr + addr), ssiString);
 811                 }
 812
 813                 rptr += 8;     // Point to the next relocation record
 814         }
 815
 816         // Update the COF segment offset allowing for the phrase padding.
 817         // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
 818         if (flag == T_DATA)
 819         {
 820                 // TEXT segment plus padding
 821                 pad = ((ofile->o_header.tsize + secalign) & ~secalign);
 822                 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
 823
 824                 // DATA segment plus padding
 825                 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
 826                 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
 827
 828                 // BSS segment plus padding
 829                 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
 830                 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
 831         }
 832
 833         // Return value, should always be zero
 834         return 0;
 835 }
 836
 837
 838 //
 839 // Add a path character to the end of string 's' if it doesn't already end with
 840 // one. The last occurrance of '/' or '\' in the string is assumed to be the
 841 // path character.
 842 //
 843 // This is fucking shit. We know what the path delimiter is, its FUCKING
 844 // DEFINED IN THE FUCKING HEADER. FOR FUCKS SAKE. AND YES, HOPE TO GOD THERE'S
 845 // ENOUGH SPACE IN THE PASSED IN BUFFER TO HOLD THE EXTRA CHARACTER!
 846 //
 847 void AppendPathDelimiter(char * s)
 848 {
 849 #if 0
 850         // And hope to God that there's enough space in the buffer...
 851         char pathchar = 0;
 852
 853         while (*s)
 854         {
 855                 if (*s == '/' || *s == '\\')
 856                         pathchar = *s;
 857
 858                 s++;
 859         }
 860
 861         s--;
 862
 863         if (*s == pathchar)
 864                 return;
 865
 866         *++s = pathchar;
 867         *++s = 0;
 868 #else
 869         int length = strlen(s);
 870
 871         if (s[length - 1] != PATH_DELIMITER)
 872         {
 873                 s[length] = PATH_DELIMITER;
 874                 s[length + 1] = 0;      // BUFFER OVERFLOW!!!! FFFFFFFFUUUUUUUUUUUU
 875         }
 876 #endif
 877 }
 878
 879
 880 //
 881 // Try to open "name", "name.o", "${libdir}name", "${libdir}name.o". Return the
 882 // handle of the file successfully opened. p_name is updated to point to a
 883 // malloc()'ed string which is the name which actually got opened. p_name will
 884 // return unchanged if the file can't be found.
 885 //
 886 int TryOpenFile(char ** p_name)
 887 {
 888         char * name = *p_name;
 889
 890         // Note that libdir will be an empty string if there is none specified
 891         char * tmpbuf = malloc(strlen(name) + strlen(libdir) + 3);
 892
 893         if (tmpbuf == NULL)
 894         {
 895                 printf("TryOpenFile() : out of memory\n");
 896                 return -1;
 897         }
 898
 899         strcpy(tmpbuf, name);
 900         int hasdot = (strrchr(tmpbuf, '.') > strrchr(tmpbuf, PATH_DELIMITER));
 901         // Try to open file as passed first
 902         int fd = open(tmpbuf, _OPEN_FLAGS);
 903
 904         if (fd >= 0)
 905                 goto ok;
 906
 907         if (!hasdot)
 908         {
 909                 // Try to open file with '.o' added
 910                 strcat(tmpbuf, ".o");
 911                 fd = open(tmpbuf, _OPEN_FLAGS);
 912
 913                 if (fd >= 0)
 914                         goto ok;
 915         }
 916
 917         // Try the libdir only if the name isn't already anchored
 918         // Shamus: WTH, this makes no sense... Why the ':'? Is this a Macintosh??
 919 //      if (*name != '/' && *name != '\\' && !strchr(name, ':'))
 920         if ((*name != PATH_DELIMITER) && (strchr(name, ':') == NULL))
 921         {
 922                 strcpy(tmpbuf, libdir);
 923                 // Add a trailing path char if there isn't one already
 924                 AppendPathDelimiter(tmpbuf);
 925                 strcat(tmpbuf, name);
 926
 927                 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
 928                         goto ok;
 929
 930                 if (!hasdot)
 931                 {
 932                         strcat(tmpbuf, ".o");
 933
 934                         if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
 935                                 goto ok;
 936                 }
 937         }
 938
 939         // Couldn't open file at all
 940         return -1;
 941
 942 // There are worse things... :-P
 943 ok:
 944         tmpbuf = realloc(tmpbuf, strlen(tmpbuf) + 1);
 945
 946         if (tmpbuf == NULL)
 947         {
 948                 printf("TryOpenFile() : out of memory\n");
 949                 return -1;
 950         }
 951
 952         *p_name = tmpbuf;
 953         return fd;
 954 }
 955
 956
 957 //
 958 // What it says on the tin
 959 //
 960 void WriteARName(struct OFILE * p)
 961 {
 962         int flag = *(p->o_arname);
 963         printf("%s%s%s", (flag ? (char *)(p->o_arname) : ""), (flag ? ":" : ""), p->o_name);
 964 }
 965
 966
 967 //
 968 // Collect file names and handles in a buffer so there is less disk activity.
 969 // Call DoFile with flag FALSE for normal object files and archives.
 970 // Call it with flag TRUE and a symbol name for include files (-i).
 971 //
 972 int DoFile(char * fname, int incFlag, char * sym)
 973 {
 974         // Verbose information
 975         if (vflag)
 976         {
 977                 printf("DoFile() : `%s' %s", fname, incFlag ? "INCLUDE" : "NORMAL");
 978
 979                 if (incFlag)
 980                         printf(" symbol %s", sym);
 981
 982                 printf("\n");
 983         }
 984
 985         // Reached maximum file handles
 986         if (hd == NHANDLES)
 987         {
 988                 if (ProcessFiles())
 989                         return 1;
 990         }
 991
 992         // Attempt to open input file
 993         int fd = TryOpenFile(&fname);
 994
 995         if (fd < 0)
 996         {
 997                 printf("Cannot find input module %s\n", fname);
 998                 return 1;
 999         }
1000
1001         // The file is open; save its info in the handle and name arrays
1002         handle[hd] = fd;
1003         name[hd] = fname;               // This is the name from TryOpenFile()
1004         hflag[hd] = incFlag;
1005
1006         // Include files
1007         if (incFlag)
1008         {
1009                 int temp = strlen(sym);         // Get symbol length
1010
1011                 // 100 chars is max length of a symbol
1012                 if (temp > 99)
1013                 {
1014                         sym[99] = '\0';
1015                         temp = 99;
1016                 }
1017
1018                 // Malloc enough space for two symbols, then build the second one.
1019                 // Second one may be one character longer than first
1020                 if ((hsym1[hd] = malloc((long)temp + 1)) == NULL
1021                         || (hsym2[hd] = malloc((long)temp + 2)) == NULL)
1022                 {
1023                         printf("DoFile() : out of memory for include-file symbols\n");
1024                         return 1;
1025                 }
1026
1027                 strcpy(hsym1[hd], sym);
1028                 strcpy(hsym2[hd], sym);
1029
1030                 if (temp == 99)
1031                 {
1032                         if (sym[99] == 'x')
1033                         {
1034                                 printf("Last char of %s is already 'x': choose another name\n", sym);
1035                                 return 1;
1036                         }
1037
1038                         hsym2[hd][99] = 'x';
1039                 }
1040                 else
1041                 {
1042                         hsym2[hd][temp] = 'x';
1043                         hsym2[hd][temp+1] = '\0';
1044                 }
1045         }
1046
1047         // Increment next handle index
1048         hd++;
1049         // No problems
1050         return 0;
1051 }
1052
1053
1054 //
1055 // Pad TEXT or DATA segment to the requested boundary
1056 //
1057 int PadSegment(FILE * fd, long segsize, int value)
1058 {
1059         int i;
1060         char padarray[32];
1061         char * padptr;
1062
1063         // Determine the number of padding bytes that are needed
1064         long padsize = (segsize + secalign) & ~secalign;
1065         padsize = padsize - segsize;
1066
1067         // Fill pad array if padding is required
1068         if (padsize)
1069         {
1070                 padptr = padarray;
1071
1072                 for(i=0; i<16; i++)
1073                 {
1074                         PutWord(padptr, value);
1075                         padptr += 2;
1076                 }
1077
1078                 symoffset += padsize;
1079
1080                 // Write padding bytes
1081                 if (fwrite(padarray, padsize, 1, fd) != 1)
1082                         return 1;
1083         }
1084
1085         return 0;
1086 }
1087
1088
1089 //
1090 // Write the output file
1091 //
1092 int WriteOutputFile(struct OHEADER * header)
1093 {
1094         unsigned osize;                                         // Object segment size
1095         struct OFILE * otemp;                           // Object file pointer
1096         int i, j;                                                       // Iterators
1097         char himage[0x168];                                     // Header image (COF = 0xA8)
1098         unsigned tsoff, dsoff, bsoff;           // Segment offset values
1099         unsigned index, type, value;            // Symbol table index, type and value
1100         short abstype;                                          // ABS symbol type
1101         char symbol[14];                                        // Symbol record for ABS files
1102         int slen;                                                       // Symbol string length
1103
1104         symoffset = 0;                                          // Initialise symbol offset
1105
1106         // Add correct output extension if none
1107         if (strchr(ofile, '.') == NULL)
1108         {
1109                 if (aflag && cflag)
1110                         strcat(ofile, ".cof");          // COF files
1111                 else if (aflag && !cflag)
1112                         strcat(ofile, ".abs");          // ABS files
1113                 else
1114                         strcat(ofile, ".o");            // Object files (partial linking etc)
1115         }
1116
1117         FILE * fd = fopen(ofile, "wb");         // Attempt to open output file
1118
1119         if (!fd)
1120         {
1121                 printf("Can't open output file %s\n", ofile);
1122                 return 1;
1123         }
1124
1125         // Build the output file header
1126         // Absolute (COF) header
1127         if (cflag)
1128         {
1129                 tsoff = dsoff = bsoff = 0xA8;   // Initialises segment offsets
1130
1131                 // Process each object file segment size to obtain a cumulative segment
1132                 // size for both the TEXT and DATA segments
1133                 for(i=0; i<(int)obj_index; i++)
1134                 {
1135                         dsoff += obj_segsize[i][0];     // Adding TEXT segment sizes
1136                         bsoff += obj_segsize[i][0] + obj_segsize[i][1]; // Adding TEXT and DATA segment sizes
1137                 }
1138
1139                 // Currently this only builds a COF absolute file. Conditionals and
1140                 // additional code will need to be added for ABS and partial linking.
1141
1142                 // Build the COF_HDR
1143                 PutWord(himage + 0,   0x0150               ); // Magic Number (0x0150)
1144                 PutWord(himage + 2,   0x0003               ); // Sections Number (3)
1145                 PutLong(himage + 4,   0x00000000           ); // Date (0L)
1146                 PutLong(himage + 8,   dsoff + header->dsize); // Offset to Symbols Section
1147                 PutLong(himage + 12,  ost_index);             // Number of Symbols
1148                 PutWord(himage + 16,  0x001C               ); // Size of RUN_HDR (0x1C)
1149                 PutWord(himage + 18,  0x0003               ); // Executable Flags (3)
1150
1151                 // Build the RUN_HDR
1152                 PutLong(himage + 20,  0x00000107           ); // Magic/vstamp
1153                 PutLong(himage + 24,  header->tsize        ); // TEXT size in bytes
1154                 PutLong(himage + 28,  header->dsize        ); // DATA size in bytes
1155                 PutLong(himage + 32,  header->bsize        ); // BSS size in bytes
1156                 PutLong(himage + 36,  tbase                ); // Start of executable, normally @TEXT
1157                 PutLong(himage + 40,  tbase                ); // @TEXT
1158                 PutLong(himage + 44,  dbase                ); // @DATA
1159
1160                 // Build the TEXT SEC_HDR
1161                 PutLong(himage + 48,  0x2E746578           );
1162                 PutLong(himage + 52,  0x74000000           ); // ".text"
1163                 PutLong(himage + 56,  tbase                ); // TEXT START
1164                 PutLong(himage + 60,  tbase                ); // TEXT START
1165                 PutLong(himage + 64,  header->tsize        ); // TEXT size in bytes
1166                 PutLong(himage + 68,  tsoff                ); // Offset to section data in file
1167                 PutLong(himage + 72,  0x00000000           ); // Offset to section reloc in file (0L)
1168                 PutLong(himage + 76,  0x00000000           ); // Offset to debug lines structures (0L)
1169                 PutLong(himage + 80,  0x00000000           ); // Nreloc/nlnno (0L)
1170                 PutLong(himage + 84,  0x00000020           ); // SEC_FLAGS: STYP_TEXT
1171
1172                 // Build the DATA SEC_HDR
1173                 PutLong(himage + 88,  0x2E646174           );
1174                 PutLong(himage + 92,  0x61000000           ); // ".data"
1175                 PutLong(himage + 96,  dbase                ); // DATA START
1176                 PutLong(himage + 100, dbase                ); // DATA START
1177                 PutLong(himage + 104, header->dsize        ); // DATA size in bytes
1178                 PutLong(himage + 108, dsoff                ); // Offset to section data in file
1179                 PutLong(himage + 112, 0x00000000           ); // Offset to section reloc in file (0L)
1180                 PutLong(himage + 116, 0x00000000           ); // Offset to debugging lines structures (0L)
1181                 PutLong(himage + 120, 0x00000000           ); // Nreloc/nlnno (0L)
1182                 PutLong(himage + 124, 0x00000040           ); // SEC_FLAGS: STYP_DATA
1183
1184                 // Build the BSS SEC_HDR
1185                 PutLong(himage + 128, 0x2E627373           );
1186                 PutLong(himage + 132, 0x00000000           ); // ".bss"
1187                 PutLong(himage + 136, bbase                ); // BSS START
1188                 PutLong(himage + 140, bbase                ); // BSS START
1189                 PutLong(himage + 144, header->bsize        ); // BSS size in bytes
1190                 PutLong(himage + 148, bsoff                ); // Offset to section data in file
1191                 PutLong(himage + 152, 0x00000000           ); // Offset to section reloc in file (0L)
1192                 PutLong(himage + 156, 0x00000000           ); // Offset to debugging lines structures (0L)
1193                 PutLong(himage + 160, 0x00000000           ); // Nreloc/nlnno (0L)
1194                 PutLong(himage + 164, 0x00000080           ); // SEC_FLAGS: STYP_BSS
1195
1196                 symoffset = 168;                              // Update symbol offset
1197         }
1198         // Absolute (ABS) header
1199         else
1200         {
1201                 // Build the ABS header
1202                 PutWord(himage + 0,   0x601B               ); // Magic Number (0x601B)
1203                 PutLong(himage + 2,   header->tsize        ); // TEXT segment size
1204                 PutLong(himage + 6,   header->dsize        ); // DATA segment size
1205                 PutLong(himage + 10,  header->bsize        ); // BSS segment size
1206                 PutLong(himage + 14,  ost_index * 14       ); // Symbol table size (?)
1207                 PutLong(himage + 18,  0x00000000           ); //
1208                 PutLong(himage + 22,  tbase                ); // TEXT base address
1209                 PutWord(himage + 26,  0xFFFF               ); // Flags (?)
1210                 PutLong(himage + 28,  dbase                ); // DATA base address
1211                 PutLong(himage + 32,  bbase                ); // BSS base address
1212
1213                 symoffset = 36;                               // Update symbol offset
1214         }
1215
1216         // Write the header, but not if noheaderflag
1217         // Absolute (ABS) header
1218         if (!cflag)
1219         {
1220                 if (!noheaderflag)
1221                         if (fwrite(himage, 36, 1, fd) != 1)
1222                                 goto werror;
1223         }
1224         // Absolute (COF) header
1225         else
1226         {
1227                 if (fwrite(himage, 168, 1, fd) != 1)
1228                         goto werror;
1229         }
1230
1231         // Write the TEXT segment of each object file
1232         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1233         {
1234                 osize = otemp->o_header.tsize;
1235
1236                 // Write only if segment has size
1237                 if (osize)
1238                 {
1239                         if (vflag > 1)
1240                                 printf("Writing TEXT Segment of %s\n", otemp->o_name);
1241
1242                         if (fwrite(otemp->o_image + 32, osize, 1, fd) != 1)
1243                                 goto werror;
1244
1245                         // Pad to required alignment boundary
1246                         if (PadSegment(fd, osize, 0x0000))
1247                                 goto werror;
1248
1249                         symoffset += osize;
1250                 }
1251         }
1252
1253         // Write the DATA segment of each object file
1254         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1255         {
1256                 osize = otemp->o_header.dsize;
1257
1258                 // Write only if the segment has size
1259                 if (osize)
1260                 {
1261                         if (vflag > 1)
1262                                 printf("Writing DATA Segment of %s\n", otemp->o_name);
1263
1264                         if (fwrite((otemp->o_image + 32 + otemp->o_header.tsize), osize, 1, fd) != 1)
1265                                 goto werror;
1266
1267                         // Pad to required alignment boundary
1268                         if (PadSegment(fd, osize, 0))
1269                                 goto werror;
1270
1271                         symoffset += osize;
1272                 }
1273         }
1274
1275         if (!noheaderflag)
1276         {
1277                 // Write the symbols table and string table
1278                 // Absolute (COF) symbol/string table
1279                 if (cflag)
1280                 {
1281                         if (header->ssize)
1282                         {
1283                                 if (fwrite(ost, (ost_ptr - ost), 1, fd) != 1)
1284                                         goto werror;
1285
1286                                 if (fwrite(oststr, (oststr_ptr - oststr), 1, fd) != 1)
1287                                         goto werror;
1288                         }
1289                 }
1290                 // Absolute (ABS) symbol/string table
1291                 else
1292                 {
1293                         // The symbol and string table have been created as part of the
1294                         // DoSymbols() function and the output symbol and string tables are
1295                         // in COF format. For an ABS file we need to process through this
1296                         // to create the 14 character long combined symbol and string
1297                         // table. Format of symbol table in ABS: AAAAAAAATTVVVV, where
1298                         // (A)=STRING, (T)=TYPE & (V)=VALUE
1299
1300                         for(i=0; i<ost_index; i++)
1301                         {
1302                                 memset(symbol, 0, 14);          // Initialise symbol record
1303                                 abstype = 0;                            // Initialise ABS symbol type
1304                                 slen = 0;                                       // Initialise symbol string length
1305                                 index = GetLong(ost + (i * 12));        // Get symbol index
1306                                 type  = GetLong((ost + (i * 12)) + 4);  // Get symbol type
1307
1308                                 // Skip debug symbols
1309                                 if (type & 0xF0000000)
1310                                         continue;
1311
1312                                 // Get symbol value
1313                                 value = GetLong((ost + (i * 12)) + 8);
1314                                 slen = strlen(oststr + index);
1315
1316                                 // Get symbol string (maximum 8 chars)
1317                                 if (slen > 8)
1318                                 {
1319                                         for(j=0; j<8; j++)
1320                                                 *(symbol + j) = *(oststr + index + j);
1321                                 }
1322                                 else
1323                                 {
1324                                         for(j=0; j<slen; j++)
1325                                                 *(symbol + j) = *(oststr + index + j);
1326                                 }
1327
1328                                 // Modify to ABS symbol type
1329                                 switch (type)
1330                                 {
1331                                 case 0x02000000: abstype = (short)ABST_DEFINED;                           break;
1332                                 case 0x04000000: abstype = (short)ABST_DEFINED | ABST_TEXT;               break;
1333                                 case 0x05000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_TEXT; break;
1334                                 case 0x06000000: abstype = (short)ABST_DEFINED | ABST_DATA;               break;
1335                                 case 0x07000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_DATA; break;
1336                                 case 0x08000000: abstype = (short)ABST_DEFINED | ABST_BSS;                break;
1337                                 case 0x09000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_BSS;  break;
1338                                 default:
1339                                         printf("warning (WriteOutputFile): ABS, cannot determine symbol type ($%08X)\n", type);
1340                                         type = 0;
1341                                         break;
1342                                 }
1343
1344                                 PutWord(symbol + 8, abstype);   // Write back new ABS type
1345                                 PutLong(symbol + 10, value);    // Write back value
1346
1347                                 // Write symbol record
1348                                 if (fwrite(symbol, 14, 1, fd) != 1)
1349                                         goto werror;
1350                         }
1351                 }
1352         }
1353
1354         // Close the file
1355         if (fclose(fd))
1356         {
1357                 printf("Close error on output file %s\n",ofile);
1358                 return 1;
1359         }
1360
1361         return 0;
1362
1363 werror:
1364         printf("Write error on output file %s\n", ofile);
1365         fclose(fd);                     // Try to close output file anyway
1366         return 1;
1367 }
1368
1369
1370 //
1371 // Display the symbol load map
1372 //
1373 int ShowSymbolLoadMap(struct OHEADER * header)
1374 {
1375         unsigned i, o;                  // Inner and outer loop iterators
1376         unsigned c;                             // Column number
1377         unsigned index;                 // Symbol string index
1378         unsigned type;                  // Symbol type
1379         unsigned value;                 // Symbol value
1380         char * symbol;                  // Symbol string value
1381
1382         if (ost_index == 0)
1383                 return 0;                       // Return if no symbols to map
1384
1385         printf("LOAD MAP\n\n");
1386
1387         // Outer loop for each of the symbol areas to map out;
1388         // 0 = NON-RELOCATABLE SYMBOLS
1389         // 1 = TEXT-SEGMENT RELOCATABLE SYMBOLS
1390         // 2 = DATA-SEGMENT RELOCATABLE SYMBOLS
1391         // 3 = BSS-SEGMENT RELOCATABLE SYMBOLS
1392         for(o=0; o<4; o++)
1393         {
1394                 // Display the correct map header for the symbols being processed
1395                 switch (o)
1396                 {
1397                 case 0: printf("NON-RELOCATABLE SYMBOLS\n\n");          break;
1398                 case 1: printf("TEXT-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1399                 case 2: printf("DATA-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1400                 case 3: printf("BSS-SEGMENT RELOCATABLE SYMBOLS\n\n");  break;
1401                 }
1402
1403                 c = 0;                          // Initialise column number
1404
1405                 // Inner loop to process each record in the symbol table
1406                 for(i=0; i<(unsigned)ost_index; i++)
1407                 {
1408                         index  = GetLong(ost + (i * 12));               // Get symbol string index
1409                         type   = GetLong(ost + (i * 12) + 4);   // Get symbol type
1410                         value  = GetLong(ost + (i * 12) + 8);   // Get symbol value
1411                         symbol = oststr + index;                                // Get symbol string
1412
1413                         // Display only three columns
1414                         if (c == 3)
1415                         {
1416                                 printf("\n");
1417                                 c = 0;
1418                         }
1419
1420                         // If local symbols not included and the type is local then go to
1421                         // next symbol record
1422                         if (!lflag & !(type & 0x01000000))
1423                                 continue;
1424
1425                         // Output each symbol to the display, dependant on type
1426                         switch (o)
1427                         {
1428                         case 0:
1429                                 // Non-relocatable symbols
1430                                 if (type == 0x02000000 || type == 0x03000000)
1431                                 {
1432                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1433                                         c++;
1434                                 }
1435
1436                                 break;
1437                         case 1:
1438                                 // TEXT segment relocatable symbols
1439                                 if (type == 0x04000000 || type == 0x05000000)
1440                                 {
1441                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1442                                         c++;
1443                                 }
1444
1445                                 break;
1446                         case 2:
1447                                 // DATA segment relocatble symbols
1448                                 if (type == 0x06000000 || type == 0x07000000)
1449                                 {
1450                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1451                                         c++;
1452                                 }
1453
1454                                 break;
1455                         case 3:
1456                                 // BSS segment relocatable symbols
1457                                 if (type == 0x08000000 || type == 0x09000000)
1458                                 {
1459                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1460                                         c++;
1461                                 }
1462
1463                                 break;
1464                         }
1465                 }
1466
1467                 printf("\n\n");
1468         }
1469
1470         return 0;
1471 }
1472
1473
1474 //
1475 // Stuff the (long) value of a string into the value argument. RETURNS TRUE if
1476 // the string doesn't parse.  Parses only as a hexadecimal string.
1477 //
1478 int GetHexValue(char * string, int * value)
1479 {
1480         *value = 0;
1481
1482         while (isxdigit(*string))
1483         {
1484                 if (isdigit(*string))
1485                 {
1486                         *value = (*value << 4) + (*string++ - '0');
1487                 }
1488                 else
1489                 {
1490                         if (isupper(*string))
1491                                 *string = tolower(*string);
1492
1493                         *value = (*value << 4) + ((*string++ - 'a') + 10);
1494                 }
1495         }
1496
1497         if (*string != '\0')
1498         {
1499                 printf("Invalid hexadecimal value");
1500                 return 1;
1501         }
1502
1503         return 0;
1504 }
1505
1506
1507 //
1508 // Create one big .o file from the images already in memory, returning a
1509 // pointer to an OHEADER. Note that the oheader is just the header for the
1510 // output (plus some other information). The text, data, and fixups are all
1511 // still in the ofile images hanging off the global `olist'.
1512 //
1513 struct OHEADER * MakeOutputFile()
1514 {
1515         unsigned tptr, dptr, bptr;      // Bases in runtime model
1516         int ret = 0;                            // Return value
1517         struct OHEADER * header;        // Output header pointer
1518
1519         // Initialize cumulative segment sizes
1520         textsize = datasize = bsssize = 0;
1521
1522         // For each object file, accumulate the sizes of the segments but remove
1523         // those object files which are unused
1524         struct OFILE * oprev = NULL;    // Init previous obj file list ptr
1525         struct OFILE * otemp = olist;   // Set temp pointer to object file list
1526         int i = 0;
1527
1528         while (otemp != NULL)
1529         {
1530                 // UNUSED !!!!! (it's !O_ARCHIVE, so this code executes.)
1531                 if (!(otemp->o_flags & O_ARCHIVE))
1532                 {
1533                         if ((otemp->o_flags & O_USED) == 0)
1534                         {
1535                                 if (wflag)
1536                                 {
1537                                         printf("Unused object file ");
1538                                         WriteARName(otemp);
1539                                         printf(" discarded.\n");
1540                                 }
1541
1542                                 // Drop the entry from the linked list
1543                                 if (oprev == NULL)
1544                                         olist = otemp->o_next;
1545                                 else
1546                                         oprev->o_next = otemp->o_next;
1547
1548                                 // Free the object entry if it's not an archive file
1549                                 if (!otemp->isArchiveFile)
1550                                         free(otemp->o_image);
1551
1552                                 // Also need to remove them from the obj_* tables too :-P
1553                                 // N.B.: Would probably be worthwhile to remove crap like this
1554                                 //       and stuff it into the OFILE structure...
1555                                 if (wflag)
1556                                         printf("»-> removing %s... (index == %i, len == %i)\n", obj_fname[i], i, obj_index - 1);
1557
1558                                 int k;
1559
1560                                 for(k=i; k<obj_index-1; k++)
1561                                 {
1562                                         memcpy(obj_fname[k], obj_fname[k + 1], FNLEN);
1563                                         obj_segsize[k][0] = obj_segsize[k + 1][0];
1564                                         obj_segsize[k][1] = obj_segsize[k + 1][1];
1565                                         obj_segsize[k][2] = obj_segsize[k + 1][2];
1566                                 }
1567
1568                                 obj_index--;
1569                                 i--;
1570                         }
1571                         else
1572                         {
1573                                 // Increment total of segment sizes ensuring requested
1574                                 // alignment
1575                                 textsize += (otemp->o_header.tsize + secalign) & ~secalign;
1576                                 datasize += (otemp->o_header.dsize + secalign) & ~secalign;
1577                                 bsssize  += (otemp->o_header.bsize + secalign) & ~secalign;
1578                                 oprev = otemp;
1579                         }
1580                 }
1581
1582                 // Go to next object file list pointer
1583                 otemp = otemp->o_next;
1584                 i++;
1585         }
1586
1587         // Update base addresses and inject the symbols _TEXT_E, _DATA_E and _BSS_E
1588         // into the OST
1589         tbase = tval;
1590
1591         if (!dval)
1592         {
1593                 // DATA follows TEXT
1594                 dbase = tval + textsize;
1595
1596                 if (!bval)
1597                         // BSS follows DATA
1598                         bbase = tval + textsize + datasize;
1599                 else
1600                         // BSS is independent of DATA
1601                         bbase = bval;
1602         }
1603         else
1604         {
1605                 // DATA is independant of TEXT
1606                 dbase = dval;
1607
1608                 if (!bval)
1609                         // BSS follows DATA
1610                         bbase = dval + datasize;
1611                 else
1612                         // BSS is independent of DATA
1613                         bbase = bval;
1614         }
1615
1616         OSTAdd("_TEXT_E", 0x05000000, tbase + textsize);
1617         OSTAdd("_DATA_E", 0x07000000, dbase + datasize);
1618         OSTAdd("_BSS_E",  0x09000000, bbase + bsssize);
1619
1620         // Place each unresolved symbol in the output symbol table
1621         // N.B.: It only gets here to do this if user passes in -u flag
1622         //       [Only used here, once]
1623         if (DoUnresolved())
1624                 return NULL;
1625
1626         // Initialise base addresses
1627         tptr = dptr = bptr = 0;
1628
1629         // For each file, relocate its symbols and add them to the output symbol
1630         // table
1631         otemp = olist;
1632         oprev = NULL;
1633
1634         while (otemp != NULL)
1635         {
1636                 otemp->o_tbase = tptr;
1637
1638                 // Do rest only for non-ARCHIVE markers
1639                 if (!(otemp->o_flags & O_ARCHIVE))
1640                 {
1641                         otemp->o_dbase = dptr;
1642                         otemp->o_bbase = bptr;
1643                         tptr += (otemp->o_header.tsize + secalign) & ~secalign;
1644                         dptr += (otemp->o_header.dsize + secalign) & ~secalign;
1645                         bptr += (otemp->o_header.bsize + secalign) & ~secalign;
1646                 }
1647
1648                 // For each symbol, (conditionally) add it to the ost
1649                 // For ARCHIVE markers, this adds the symbol for the file & returns
1650                 // (Shamus: N.B. it does no such thing ATM)
1651                 // [Only used here, once]
1652                 if (DoSymbols(otemp))
1653                         return NULL;
1654
1655                 if (otemp->o_flags & O_ARCHIVE)
1656                 {
1657                         struct OFILE * oNext = otemp->o_next;
1658
1659                         // Now that the archive is marked, remove it from list
1660                         if (oprev == NULL)
1661                                 olist = otemp->o_next;
1662                         else
1663                                 oprev->o_next = otemp->o_next;
1664
1665                         if (otemp->o_image && !otemp->isArchiveFile)
1666                                 free(otemp->o_image);
1667
1668                         free(otemp);
1669                         otemp = oNext;
1670                 }
1671                 else
1672                 {
1673                         oprev = otemp;
1674                         otemp = otemp->o_next;
1675                 }
1676         }
1677
1678         // Places all the externs, globals etc into the output symbol table
1679         if (DoCommon() == -1)
1680                 return NULL;
1681
1682         // Create a new output file header
1683         header = new_oheader();
1684
1685         if (header == NULL)
1686         {
1687                 printf("MakeOutputFile: out of memory!\n");
1688                 return NULL;
1689         }
1690
1691         // Fill in the output header. Does not match the actual output but values
1692         // used as reference
1693         header->magic = 0x0150;                         // COF magic number
1694         header->tsize = textsize;                       // TEXT segment size
1695         header->dsize = datasize;                       // DATA segment size
1696         header->bsize = bsssize;                        // BSS segment size
1697         header->ssize = (ost_ptr - ost);        // Symbol table size
1698         header->ostbase = ost;                          // Output symbol table base address
1699
1700         // For each object file, relocate its TEXT and DATA segments. OR the result
1701         // into ret so all files get moved (and errors reported) before returning
1702         // with the error condition
1703         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1704         {
1705                 if (!(otemp->o_flags & O_ARCHIVE))
1706                 {
1707                         ret |= RelocateSegment(otemp, T_TEXT); // TEXT segment relocations
1708                         ret |= RelocateSegment(otemp, T_DATA); // DATA segment relocations
1709                 }
1710         }
1711
1712         // Done with global symbol hash tables
1713         FreeHashes();
1714
1715         return (ret ? (struct OHEADER *)NULL : header);
1716 }
1717
1718
1719 //
1720 // Add symbol to hash list
1721 //
1722 int AddSymbolToHashList(struct HREC ** hptr, char * sym, struct OFILE * ofile,
1723         long value, int type)
1724 {
1725         struct HREC * htemp = new_hrec();
1726
1727         if (htemp == NULL)
1728         {
1729                 printf("Out of memory\n");
1730                 return 1;
1731         }
1732
1733         // Shamus: Moar testing...
1734         if (vflag > 1)
1735         {
1736                 printf("AddSymbolToHashList(): hptr=$%08X, sym=\"%s\", ofile=$%08X, value=$%X, type=$%X\n", hptr, sym, ofile, value, type);
1737         }
1738
1739         // Populate hash record
1740         memset(htemp->h_sym, 0, SYMLEN);
1741         strcpy(htemp->h_sym, sym);
1742         htemp->h_ofile = ofile;
1743         htemp->h_value = value;
1744         htemp->h_type = type;
1745
1746         // Add new hash to the front of the list (hence the ** for hptr)
1747         htemp->h_next = *hptr;
1748         *hptr = htemp;
1749
1750         return 0;
1751 }
1752
1753
1754 //
1755 // Add symbol to the unresolved symbols hash table (really, it's a linked list)
1756 //
1757 int AddUnresolvedSymbol(char * sym, struct OFILE * ofile)
1758 {
1759         if (vflag > 1)
1760                 printf("AddUnresolvedSymbol(%s, %s)\n", sym, ofile->o_name);
1761
1762         return AddSymbolToHashList(&unresolved, sym, ofile, 0L, 0);
1763 }
1764
1765
1766 //
1767 // Remove the HREC from the unresolved symbol list, and pass back a pointer
1768 // to the spot where the HREC was.
1769 //
1770 struct HREC * RemoveUnresolvedSymbol(struct HREC * hrec)
1771 {
1772         struct HREC * ptr = unresolved;
1773         struct HREC * previous = NULL;
1774
1775         while ((ptr != hrec) && (ptr != NULL))
1776         {
1777                 previous = ptr;
1778                 ptr = ptr->h_next;
1779         }
1780
1781         // Not found...!
1782         if (ptr == NULL)
1783                 return NULL;
1784
1785         struct HREC * next = ptr->h_next;
1786
1787         // Remove the head if nothing previous, otherwise, remove what we found
1788         if (previous == NULL)
1789                 unresolved = next;
1790         else
1791                 previous->h_next = next;
1792
1793         free(ptr);
1794         return next;
1795 }
1796
1797
1798 //
1799 // Add symbol to the unresolved symbols hash table
1800 //
1801 int AddARSymbol(char * sym, struct OFILE * ofile)
1802 {
1803         if (vflag > 1)
1804                 printf("AddARSymbol(%s, %s)\n", sym, ofile->o_name);
1805
1806         return AddSymbolToHashList(&arSymbol, sym, ofile, 0L, 0);
1807 }
1808
1809
1810 //
1811 // Generate hash value from the 1st 15 characters of the symbol modulo the
1812 // number of buckets in the hash.
1813 //
1814 int GetHash(char * s)
1815 {
1816         // For this to be consistent, the symbol MUST be zeroed out beforehand!
1817         // N.B.: strncpy() pads zeroes for us, if the symbol is less than 15 chars.
1818         char c[15];
1819         strncpy(c, s, 15);
1820
1821         int i = (c[0] + c[1] + c[2] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8]
1822                 + c[9] + c[10] + c[11] + c[12] + c[13] + c[14]) % NBUCKETS;
1823         return i;
1824 }
1825
1826
1827 //
1828 // Lookup a symbol in the hash table.
1829 // Returns either a pointer to the HREC or NULL if not found.
1830 //
1831 struct HREC * LookupHREC(char * symbol)
1832 {
1833         struct HREC * hptr = htable[GetHash(symbol)];
1834
1835         while (hptr != NULL)
1836         {
1837 //This is utter failure...
1838 //              if (symcmp(symbol, hptr->h_sym))  <-- left here for giggles :D  - LinkoVitch
1839                 // Return hash record pointer if found
1840                 if (strcmp(symbol, hptr->h_sym) == 0)
1841                         return hptr;
1842
1843                 hptr = hptr->h_next;
1844         }
1845
1846         return NULL;
1847 }
1848
1849
1850 //
1851 // Lookup a symbol in the AR symbol table.
1852 // Returns either a pointer to the HREC or NULL if not found.
1853 //
1854 struct HREC * LookupARHREC(char * symbol)
1855 {
1856         struct HREC * hptr = arSymbol;
1857
1858         while (hptr != NULL)
1859         {
1860                 // Return hash record pointer if found
1861                 if (strcmp(symbol, hptr->h_sym) == 0)
1862                         return hptr;
1863
1864                 hptr = hptr->h_next;
1865         }
1866
1867         return NULL;
1868 }
1869
1870
1871 //
1872 // Add the imported symbols from this file to unresolved, and the global and
1873 // common (???) symbols to the exported hash table.
1874 //
1875 // Change old-style commons (type == T_EXTERN, value != 0) to new-style ones
1876 // (type == (T_GLOBAL | T_EXTERN)). [??? O_o]
1877 // [N.B.: Whoever wrote the above didn't know what the fuck they were talking
1878 //        about. Commons (globals) are exactly what they are calling 'old
1879 //        style'. Also note, that there is no "T_GLOBAL" or "T_EXTERN" symbols
1880 //        defined anywhere in the code.]
1881 //
1882 int AddSymbols(struct OFILE * Ofile)
1883 {
1884         struct HREC * hptr;                     // Hash record pointer
1885
1886         if (vflag > 1)
1887         {
1888                 printf("AddSymbols: for file %s\n", Ofile->o_name);
1889                 printf("            t_bbase = $%X\n", Ofile->o_tbase);
1890                 printf("            d_bbase = $%X\n", Ofile->o_dbase);
1891                 printf("            o_bbase = $%X\n", Ofile->o_bbase);
1892                 printf("            tsize = $%X\n", Ofile->o_header.tsize);
1893                 printf("            dsize = $%X\n", Ofile->o_header.dsize);
1894                 printf("            bsize = $%X\n", Ofile->o_header.bsize);
1895                 printf("            reloc.tsize = $%X\n", Ofile->o_header.absrel.reloc.tsize);
1896                 printf("            reloc.dsize = $%X\n", Ofile->o_header.absrel.reloc.dsize);
1897         }
1898
1899         // Get base pointer, start of sym fixups
1900         char * ptr = Ofile->o_image + 32
1901                 + Ofile->o_header.tsize
1902                 + Ofile->o_header.dsize
1903                 + Ofile->o_header.absrel.reloc.tsize
1904                 + Ofile->o_header.absrel.reloc.dsize;
1905         char * sfix = ptr;                                                      // Set symbol fixup pointer
1906         char * sstr = sfix + Ofile->o_header.ssize;     // Set symbol table pointer
1907         long nsymbols = Ofile->o_header.ssize / 12;     // Obtain number of symbols
1908
1909         while (nsymbols)
1910         {
1911                 long index = GetLong(sfix);                             // Get symbol string index
1912                 long type  = GetLong(sfix + 4);                 // Get symbol type
1913                 long value = GetLong(sfix + 8);                 // Get symbol value
1914
1915                 if ((Ofile->isArchiveFile) && !(Ofile->o_flags & O_USED))
1916                 {
1917                         if ((type & T_GLBL) && (type & (T_SEG | T_ABS)))
1918                                 if (AddARSymbol(sstr + index, Ofile))
1919                                         return 1;
1920                 }
1921                 else if (type == T_GLBL)
1922                 {
1923                         // External symbol that is *not* in the current unit
1924                         // N.B.: Also, could be common symbol *in* current unit...!
1925                         hptr = LookupHREC(sstr + index);
1926
1927                         if (hptr != NULL)
1928                                 hptr->h_ofile->o_flags |= O_USED;       // Mark .o file as used
1929                         // Otherwise, *maybe* add to unresolved list
1930                         else
1931                         {
1932                                 // Check to see if this is a common symbol; if so, try to add
1933                                 // it to the hash list...
1934                                 if (value != 0)
1935                                 {
1936                                         // Actually, we need to convert this to a BSS symbol,
1937                                         // increase the size of the BSS segment for this object, &
1938                                         // add it to the hash list
1939                                         uint32_t bssLocation = Ofile->o_header.tsize + Ofile->o_header.dsize + Ofile->o_header.bsize;
1940                                         Ofile->o_header.bsize += value;
1941                                         type |= T_BSS;
1942                                         value = bssLocation;
1943                                         PutLong(sfix + 4, type);
1944                                         PutLong(sfix + 8, value);
1945
1946                                         if (vflag > 1)
1947                                                 printf("AddSymbols: Resetting common label to BSS label\n");
1948
1949                                         if (AddSymbolToHashList(&htable[GetHash(sstr + index)],
1950                                                 sstr + index, Ofile, value, type))
1951                                                 return 1;
1952                                 }
1953                                 // Check for built-in externals...
1954                                 else if ((strcmp(sstr + index, "_TEXT_E") != 0)
1955                                         && (strcmp(sstr + index, "_DATA_E") != 0)
1956                                         && (strcmp(sstr + index, "_BSS_E") != 0))
1957                                 {
1958                                         if (AddUnresolvedSymbol(sstr + index, Ofile))
1959                                                 return 1;                               // Error if addition failed
1960                                 }
1961                         }
1962                 }
1963                 else if ((type & T_GLBL) && (type & (T_SEG | T_ABS)))
1964                 {
1965                         hptr = LookupHREC(sstr + index);
1966
1967                         // Symbol isn't in the table, so try to add it:
1968                         if (hptr == NULL)
1969                         {
1970                                 if (AddSymbolToHashList(&htable[GetHash(sstr + index)],
1971                                         sstr + index, Ofile, value, type))
1972                                         return 1;
1973                         }
1974                         else
1975                         {
1976                                 // Symbol already exists, decide what to do about it
1977                                 // [N.B.: This isn't a check for a common symbol...
1978                                 //        BEWARE OF BAD INTERPRETATIONS!!]
1979                                 if (iscommon(hptr->h_type))
1980                                 {
1981                                         // Mismatch: common came first; warn and keep the global
1982                                         if (wflag)
1983                                         {
1984                                                 printf("Warning: %s: global from ", sstr + index);
1985                                                 WriteARName(Ofile);
1986                                                 printf(" used, common from ");
1987                                                 WriteARName(hptr->h_ofile);
1988                                                 printf(" discarded.\n");
1989                                         }
1990
1991                                         hptr->h_ofile = Ofile;
1992                                         hptr->h_type = type;
1993                                         hptr->h_value = value;
1994                                 }
1995                                 else
1996                                 {
1997                                         // Global exported by another ofile; warn and make this one
1998                                         // extern
1999                                         if (wflag)
2000                                         {
2001                                                 printf("Duplicate symbol %s: ", sstr + index);
2002                                                 WriteARName(hptr->h_ofile);
2003                                                 printf(" used, ");
2004                                                 WriteARName(Ofile);
2005                                                 printf(" discarded\n");
2006                                         }
2007
2008                                         // Set the global in this unit to pure external
2009                                         // (is this a good idea? what if the other one is a ref to
2010                                         // this one???)
2011                                         PutLong(sfix + 4, T_GLBL);
2012                                 }
2013                         }
2014                 }
2015
2016                 sfix += 12;                     // Increment symbol fixup pointer
2017                 nsymbols--;                     // Decrement num of symbols to process
2018         }
2019
2020         // Success loading symbols
2021         return 0;
2022 }
2023
2024
2025 //
2026 // Process object file for symbols
2027 //
2028 int DoItem(struct OFILE * obj)
2029 {
2030         // Allocate memory for object record ptr
2031         struct OFILE * Ofile = new_ofile();
2032
2033         if (Ofile == NULL)
2034         {
2035                 printf("Out of memory while processing %s\n", obj->o_name);
2036                 return 1;
2037         }
2038
2039         // Starting after all pathnames, etc., copy .o file name to Ofile
2040         char * temp = PathTail(obj->o_name);
2041
2042         // Check filename length
2043         if (strlen(temp) > FNLEN - 1)
2044         {
2045                 printf("File name too long: %s\n", temp);
2046                 return 1;
2047         }
2048
2049         // Check archive name length
2050         if (strlen(obj->o_arname) > FNLEN - 1)
2051         {
2052                 printf("Archive name too long: %s\n", obj->o_arname);
2053                 return 1;
2054         }
2055
2056         strcpy(Ofile->o_name, temp);            // Store filename
2057         strcpy(Ofile->o_arname, obj->o_arname); // Store archive name
2058
2059         // Initialise object record information
2060         Ofile->o_next  = NULL;
2061         Ofile->o_tbase = 0;
2062         Ofile->o_dbase = 0;
2063         Ofile->o_bbase = 0;
2064         Ofile->o_flags = obj->o_flags;
2065         Ofile->o_image = obj->o_image;
2066         Ofile->isArchiveFile = obj->isArchiveFile;
2067         char * ptr = obj->o_image;
2068
2069         // Don't do anything if this is just an ARCHIVE marker, just add the file
2070         // to the olist
2071         // (Shamus: N.B.: it does no such ARCHIVE thing ATM)
2072         if (!(obj->o_flags & O_ARCHIVE))
2073         {
2074                 Ofile->o_header.magic = GetLong(ptr);
2075                 Ofile->o_header.tsize = GetLong(ptr + 4);
2076                 Ofile->o_header.dsize = GetLong(ptr + 8);
2077                 Ofile->o_header.bsize = GetLong(ptr + 12);
2078                 Ofile->o_header.ssize = GetLong(ptr + 16);
2079                 Ofile->o_header.absrel.reloc.tsize = GetLong(ptr + 24);
2080                 Ofile->o_header.absrel.reloc.dsize = GetLong(ptr + 28);
2081
2082                 // Round BSS off to alignment boundary
2083                 Ofile->o_header.bsize = (Ofile->o_header.bsize + secalign) & ~secalign;
2084
2085                 if ((Ofile->o_header.dsize & 7) && wflag)
2086                 {
2087                         printf("Warning: data segment size of ");
2088                         WriteARName(Ofile);
2089                         printf(" is not a phrase multiple\n");
2090                 }
2091
2092                 // Check for odd segment sizes
2093                 if ((Ofile->o_header.tsize & 1) || (Ofile->o_header.dsize & 1)
2094                         || (Ofile->o_header.bsize & 1))
2095                 {
2096                         printf("Error: odd-sized segment in ");
2097                         WriteARName(Ofile);
2098                         printf("; link aborted.\n");
2099                         return 1;
2100                 }
2101
2102                 if (AddSymbols(Ofile))
2103                         return 1;
2104         }
2105
2106         // Add this file to the olist
2107         if (olist == NULL)
2108                 olist = Ofile;
2109         else
2110                 olast->o_next = Ofile;
2111
2112         olast = Ofile;
2113         return 0;
2114 }
2115
2116
2117 //
2118 // Handle items in processing list.
2119 //
2120 // After loading all objects, archives & include files, we now go and process
2121 // each item on the processing list (plist). Once this is done, we go through
2122 // any unresolved symbols left and see if they have shown up.
2123 //
2124 int ProcessLists(void)
2125 {
2126         // Process object file list first (adds symbols from each unit & creates
2127         // the olist)
2128         while (plist != NULL)
2129         {
2130                 if (DoItem(plist))
2131                         return 1;
2132
2133                 struct OFILE * ptemp = plist;
2134                 plist = plist->o_next;
2135                 free(ptemp);
2136         }
2137
2138         struct HREC * uptr;
2139
2140         // Process the unresolved symbols list. This may involve pulling in symbols
2141         // from any included .a units. Such units are lazy linked by default; we
2142         // generally don't want everything they provide, just what's referenced.
2143         for(uptr=unresolved; uptr!=NULL; )
2144         {
2145                 if (vflag > 1)
2146                         printf("LookupHREC(%s) => ", uptr->h_sym);
2147
2148                 struct HREC * htemp = LookupHREC(uptr->h_sym);
2149
2150                 if (htemp != NULL)
2151                 {
2152                         // Found it in the symbol table!
2153                         if (vflag > 1)
2154                                 printf("%s in %s (=$%06X)\n", (isglobal(htemp->h_type) ? "global" : "common"), htemp->h_ofile->o_name, htemp->h_value);
2155
2156                         // Mark the .o unit that the symbol is in as seen & remove from the
2157                         // unresolved list
2158                         htemp->h_ofile->o_flags |= O_USED;
2159                         uptr = RemoveUnresolvedSymbol(uptr);
2160                 }
2161                 else
2162                 {
2163                         if (vflag > 1)
2164                                 printf("NULL\n");
2165
2166                         // Check to see if the unresolved symbol is on the AR symbol list.
2167                         htemp = LookupARHREC(uptr->h_sym);
2168
2169                         // If the unresolved symbol is in a .o unit that is unused, we can
2170                         // drop it; same if the unresolved symbol is in the exported AR
2171                         // symbol list. Otherwise, go to the next unresolved symbol.
2172                         if (!(uptr->h_ofile->o_flags & O_USED) || (htemp != NULL))
2173                                 uptr = RemoveUnresolvedSymbol(uptr);
2174                         else
2175                                 uptr = uptr->h_next;
2176
2177                         // Now that we've possibly deleted the symbol from unresolved list
2178                         // that was also in the AR list, we add the symbols from this .o
2179                         // unit to the symbol table, mark the .o unit as used, and restart
2180                         // scanning the unresolved list as there is a good possibility that
2181                         // the symbols in the unit we're adding has unresolved symbols as
2182                         // well.
2183                         if (htemp != NULL)
2184                         {
2185                                 htemp->h_ofile->o_flags |= O_USED;
2186                                 AddSymbols(htemp->h_ofile);
2187                                 uptr = unresolved;
2188                         }
2189                 }
2190         }
2191
2192         // Show files used if the user requests it.
2193         if (vflag > 1)
2194         {
2195                 printf("Files used:\n");
2196                 struct OFILE * filePtr = olist;
2197
2198                 while (filePtr != NULL)
2199                 {
2200                         if (filePtr->o_flags & O_USED)
2201                         {
2202                                 printf("   %s%s%s\n", filePtr->o_name, (filePtr->isArchiveFile ? ":" : ""), (filePtr->isArchiveFile ? filePtr->o_arname : nullStr));
2203                         }
2204
2205                         filePtr = filePtr->o_next;
2206                 }
2207         }
2208
2209         return 0;
2210 }
2211
2212
2213 //
2214 // Extract filename from path
2215 //
2216 char * PathTail(char * name)
2217 {
2218         // Find last occurance of PATH_DELIMETER
2219         char * temp = strrchr(name, PATH_DELIMITER);
2220
2221         // Return what was passed in if path delimiter was not found
2222         if (temp == NULL)
2223                 return name;
2224
2225         return temp + 1;
2226 }
2227
2228
2229 //
2230 // Add input file to processing list
2231 //
2232 int AddToProcessingList(char * ptr, char * fname, char * arname, uint8_t arFile)
2233 {
2234         if (plist == NULL)
2235         {
2236                 // First time object record allocation
2237                 plist = new_ofile();
2238                 plast = plist;
2239         }
2240         else
2241         {
2242                 // Next object record allocation
2243                 plast->o_next = new_ofile();
2244                 plast = plast->o_next;
2245         }
2246
2247         if (plast == NULL)
2248         {
2249                 printf("Out of memory.\n");             // Error if memory allocation fails
2250                 return 1;
2251         }
2252
2253         fname = PathTail(fname);
2254         arname = PathTail(arname);
2255
2256         if (strlen(fname) > FNLEN - 1)
2257         {
2258                 // Error on excessive filename length
2259                 printf("File name too long: %s (sorry!)\n", fname);
2260                 return 1;
2261         }
2262
2263         if (strlen(arname) > FNLEN - 1)
2264         {
2265                 // Error on excessive filename length
2266                 printf("AR file name too long: %s (sorry!)\n", arname);
2267                 return 1;
2268         }
2269
2270         strcpy(plast->o_name, fname);           // Store filename sans path
2271         strcpy(plast->o_arname, arname);        // Store archive name sans path
2272         plast->o_image = ptr;                           // Store data pointer
2273         plast->o_flags = (arFile ? 0 : O_USED); // File is used if NOT in archive
2274         plast->o_next = NULL;                           // Initialise next record pointer
2275         plast->isArchiveFile = arFile;          // Shamus: Temp until can sort it out
2276
2277         return 0;                                                       // Return without errors
2278 }
2279
2280
2281 //
2282 // Process in binary include files and add them to the processing list. This
2283 // routine takes in the binary file and creates an 'object' file in memory.
2284 // Sym1/Sym2 point to the start and end of data.
2285 //
2286 // Image size for include files is:
2287 // Header ....... 32 bytes
2288 // Data ......... dsize
2289 // Sym Fixups ... 2 * 12 bytes
2290 // Symbol Size .. 4 bytes (Value to include symbols and terminating null)
2291 // Symbols ...... (strlen(sym1) + 1) + (strlen(sym2) + 1)
2292 // Terminate .... 4 bytes (0x00000000)
2293 //
2294 int LoadInclude(char * fname, int handle, char * sym1, char * sym2, int segment)
2295 {
2296         char * ptr, * sptr;
2297         int i;
2298         unsigned symtype = 0;
2299
2300         long fsize = FileSize(handle);          // Get size of include file
2301         long dsize = (fsize + secalign) & ~secalign;    // Align size to boundary
2302         int sym1len = strlen(sym1) + 1;         // Get sym1 length + null termination
2303         int sym2len = strlen(sym2) + 1;         // Get sym2 length + null termination
2304         long size = 32 + dsize + 24 + 4 + sym1len + sym2len + 4;
2305
2306         // Use calloc so the header & fixups initialize to zero
2307         // Allocate object image memory
2308         if ((ptr = calloc(size, 1)) == NULL)
2309         {
2310                 printf("Out of memory while including %s\n", fname);
2311                 close(handle);
2312                 return 1;
2313         }
2314
2315         // Read in binary data
2316         if (read(handle, ptr + 32, fsize) != fsize)
2317         {
2318                 printf("File read error on %s\n", fname);
2319                 close(handle);
2320                 free(ptr);
2321                 return 1;
2322         }
2323
2324         close(handle);
2325
2326         strcpy(obj_fname[obj_index], PathTail(fname));
2327
2328         // Build this image's dummy header
2329         PutLong(ptr, 0x00000107);              // Magic number
2330
2331         if (segment)
2332         {
2333                 PutLong(ptr+4, dsize);             // Text size
2334                 PutLong(ptr+8, 0L);                // Data size
2335                 symtype = 0x05000000;
2336                 obj_segsize[obj_index][0] = dsize;
2337                 obj_segsize[obj_index][1] = 0;
2338                 obj_segsize[obj_index][2] = 0;
2339         }
2340         else
2341         {
2342                 PutLong(ptr+4, 0L);                // Text size
2343                 PutLong(ptr+8, dsize);             // Data size
2344                 symtype = 0x07000000;
2345                 obj_segsize[obj_index][0] = 0;
2346                 obj_segsize[obj_index][1] = dsize;
2347                 obj_segsize[obj_index][2] = 0;
2348         }
2349
2350         obj_index++;                           // Increment object count
2351
2352         PutLong(ptr+12, 0L);                   // BSS size
2353         PutLong(ptr+16, 24);                   // Symbol table size
2354         PutLong(ptr+20, 0L);                   // Entry point
2355         PutLong(ptr+24, 0L);                   // TEXT relocation size
2356         PutLong(ptr+28, 0L);                   // DATA relocation size
2357
2358         sptr = ptr + 32 + dsize;               // Set sptr to symbol table location
2359
2360         PutLong(sptr,    4L);                  // String offset of symbol1
2361         PutLong(sptr+4,  symtype);             // Symbol type
2362         PutLong(sptr+8,  0x00000000);          // Symbol has no value (START)
2363         PutLong(sptr+12, 4L + (sym2len - 1));  // String offset of symbol2
2364         PutLong(sptr+16, symtype);             // Symbol type
2365         PutLong(sptr+20, dsize);               // Symbol is data size (END)
2366
2367         sptr = ptr + 32 + dsize + 24;          // Set sptr to symbol table size loc
2368
2369         PutLong(sptr, sym1len + 4L);           // Size of symbol table
2370
2371         sptr = ptr + 32 + dsize + 24 + 4;      // Set sptr to symbol table location
2372
2373         for(i=0; i<(sym1len-1); i++)           // Write symbol1 to string table
2374                 sptr[i] = *sym1++;
2375
2376         sptr += (sym1len - 1);                 // Step past symbol string
2377         *sptr = '\0';                          // Terminate symbol string
2378         sptr += 1;                             // Step past termination
2379
2380         for(i=0; i<(sym2len-1); i++)           // Write symbol2 to string table
2381                 sptr[i] = *sym2++;
2382
2383         sptr += (sym2len - 1);                 // Step past symbol string
2384         *sptr = '\0';                          // Terminate symbol string
2385         sptr += 1;                             // Step past termination
2386
2387         PutLong(sptr, 0L);                     // Terminating long for object file
2388
2389         return AddToProcessingList(ptr, fname, nullStr, 0);
2390 }
2391
2392
2393 //
2394 // Takes a file name, gets in its image, puts it on plist. The image may
2395 // already be in memory: If so, the ptr arg is non-null.  If so, the file is
2396 // already closed. Note that the file is already open (from DoFile()). RETURNS
2397 // a pointer to the OFILE structure for this file, so you can diddle its flags
2398 // (DoFile sets O_USED for files on the command line).
2399 //
2400 int LoadObject(char * fname, int fd, char * ptr)
2401 {
2402         if (ptr == NULL)
2403         {
2404                 long size = FileSize(fd);
2405
2406                 // Allocate memory for file data
2407                 ptr = malloc(size);
2408
2409                 if (ptr == NULL)
2410                 {
2411                         printf("Out of memory while processing %s\n", fname);
2412                         close(fd);
2413                         return 1;
2414                 }
2415
2416                 // Read in file data
2417                 if (read(fd, ptr, size) != size)
2418                 {
2419                         printf("File read error on %s\n", fname);
2420                         close(fd);
2421                         free(ptr);
2422                         return 1;
2423                 }
2424
2425                 // SCPCD: get the name of the file instead of all pathname
2426                 strcpy(obj_fname[obj_index], PathTail(fname));
2427                 obj_segsize[obj_index][0] = (GetLong(ptr + 4) + secalign) & ~secalign;
2428                 obj_segsize[obj_index][1] = (GetLong(ptr + 8) + secalign) & ~secalign;
2429                 obj_segsize[obj_index][2] = (GetLong(ptr + 12) + secalign) & ~secalign;
2430                 obj_index++;
2431
2432                 close(fd);                                            // Close file
2433         }
2434
2435         // Now add this image to the list of pending ofiles (plist)
2436         // This routine is shared by LoadInclude after it builds the image
2437         return AddToProcessingList(ptr, fname, nullStr, 0);
2438 }
2439
2440
2441 //
2442 // What it says on the tin: check for a .o suffix on the passed in string
2443 //
2444 uint8_t HasDotOSuffix(char * s)
2445 {
2446         char * temp = strrchr(s, '.');
2447
2448         if ((temp == NULL) || (strncmp(temp, ".o", 2) != 0))
2449                 return 0;
2450
2451         return 1;
2452 }
2453
2454
2455 //
2456 // Process an ar archive file (*.a)
2457 //
2458 int LoadArchive(char * fname, int fd)
2459 {
2460         // Read in the archive file to memory and process
2461         long size = FileSize(fd);
2462         char * ptr = malloc(size);
2463         char * endPtr = ptr + size;
2464         char * longFilenames = NULL;
2465
2466         if (ptr == NULL)
2467         {
2468                 printf("Out of memory while processing %s\n", fname);
2469                 close(fd);
2470                 return 1;
2471         }
2472
2473         if (read(fd, ptr, size) != size)
2474         {
2475                 printf("File read error on %s\n", fname);
2476                 close(fd);
2477                 free(ptr);
2478                 return 1;
2479         }
2480
2481         close(fd);
2482
2483         // Save the pointer for later...
2484         arPtr[arIndex++] = ptr;
2485         char objName[FNLEN];
2486         char objSize[11];
2487         int i;
2488 //printf("\nProcessing AR file \"%s\"...\n", fname);
2489         ptr += 8;
2490
2491         // Loop through all objects in the archive and process them
2492         do
2493         {
2494                 memset(objName, 0, 17);
2495                 objSize[10] = 0;
2496
2497                 for(i=0; i<16; i++)
2498                 {
2499 //                      if ((ptr[i] == '/') || (ptr[i] == ' '))
2500                         if ((ptr[i] == ' ') && (i != 0))
2501                         {
2502                                 objName[i] = 0;
2503                                 break;
2504                         }
2505
2506                         objName[i] = ptr[i];
2507                 }
2508
2509                 for(i=0; i<10; i++)
2510                 {
2511                         if (ptr[48 + i] == ' ')
2512                         {
2513                                 objSize[i] = 0;
2514                                 break;
2515                         }
2516
2517                         objSize[i] = ptr[48 + i];
2518                 }
2519
2520                 // Check to see if a long filename was requested
2521                 if (objName[0] == 0x20)
2522                 {
2523                         uint32_t fnSize = atoi(objName + 1);
2524
2525                         if (longFilenames != NULL)
2526                         {
2527                                 i = 0;
2528                                 char * currentFilename = longFilenames + fnSize;
2529
2530                                 while (*currentFilename != 0x0A)
2531                                         objName[i++] = *currentFilename++;
2532
2533                                 objName[i] = 0;
2534                         }
2535                 }
2536
2537                 if ((strncmp(objName, "ARFILENAMES/", 12) == 0) || (strncmp(objName, "//", 2) == 0))
2538                 {
2539                         longFilenames = ptr + 60;
2540                 }
2541                 else if (HasDotOSuffix(objName))
2542                 {
2543
2544                         // Strip off any trailing forward slash at end of object name
2545                         int lastChar = strlen(objName) - 1;
2546
2547                         if (objName[lastChar] == '/')
2548                                 objName[lastChar] = 0;
2549
2550 //printf("Processing object \"%s\" (size == %i, obj_index == %i)...\n", objName, atoi(objSize), obj_index);
2551                         strcpy(obj_fname[obj_index], objName);
2552                         obj_segsize[obj_index][0] = (GetLong(ptr + 60 + 4) + secalign) & ~secalign;
2553                         obj_segsize[obj_index][1] = (GetLong(ptr + 60  + 8) + secalign) & ~secalign;
2554                         obj_segsize[obj_index][2] = (GetLong(ptr + 60  + 12) + secalign) & ~secalign;
2555                         obj_index++;
2556
2557                         if (AddToProcessingList(ptr + 60, objName, fname, 1))
2558                                 return 1;
2559                 }
2560
2561                 uint32_t size = atoi(objSize);
2562                 size += (size & 0x01 ? 1 : 0);
2563                 ptr += 60 + size;
2564         }
2565         while (ptr < endPtr);
2566
2567         return 0;
2568 }
2569
2570
2571 //
2572 // Process files (*.o, *.a) passed in on the command line
2573 //
2574 int ProcessFiles(void)
2575 {
2576         int i;
2577         char magic[8];          // Magic header number (4 bytes for *.o, 8 for *.a)
2578
2579         // Process all file handles
2580         for(i=0; i<(int)hd; i++)
2581         {
2582                 // Verbose mode information
2583                 if (vflag == 1)
2584                         printf("Read file %s%s\n", name[i], (hflag[i] ? " (include)" : ""));
2585
2586                 if (!hflag[i])
2587                 {
2588                         // Attempt to read file magic number (OBJECT/ARCHIVE FILES)
2589                         if (read(handle[i], magic, 8) != 8)
2590                         {
2591                                 printf("Error reading file %s\n", name[i]);
2592                                 close(handle[i]);
2593                                 return 1;
2594                         }
2595
2596                         lseek(handle[i], 0L, 0);        // Reset to start of input file
2597
2598                         // Look for RMAC/MAC/GCC (a.out) object files
2599                         if ((GetLong(magic) & 0xFFFF) == 0x0107)
2600                         {
2601                                 // Process input object file
2602                                 if (LoadObject(name[i], handle[i], 0L))
2603                                         return 1;
2604                         }
2605                         // Otherwise, look for an object archive file
2606                         else if (strncmp(magic, "!<arch>\x0A", 8) == 0)
2607                         {
2608                                 if (LoadArchive(name[i], handle[i]))
2609                                         return 1;
2610                         }
2611                         else
2612                         {
2613                                 // Close file and error
2614                                 printf("%s is not a supported object or archive file\n", name[i]);
2615                                 printf("Magic == [%02X][%02X][%02X][%02X]\n", magic[0], magic[1], magic[2], magic[3]);
2616                                 close(handle[i]);
2617                                 return 1;
2618                         }
2619                 }
2620                 else
2621                 {
2622                         // INCLUDE FILES
2623                         // If hflag[i] is 1, include this in the data segment; if 2, put it
2624                         // in text segment
2625                         if (LoadInclude(name[i], handle[i], hsym1[i], hsym2[i], hflag[i] - 1))
2626                                 return 1;
2627                 }
2628         }
2629
2630         // Free include, symbol & object handles
2631         for(i=0; i<(int)hd; i++)
2632         {
2633                 free(name[i]);
2634
2635                 if (hflag[i])
2636                 {
2637                         free(hsym1[i]);
2638                         free(hsym2[i]);
2639                 }
2640         }
2641
2642         // Reset next handle indicator
2643         hd = 0;
2644         return 0;
2645 }
2646
2647
2648 //
2649 // Load newargv with pointers to arguments found in the buffer
2650 //
2651 int parse(char * buf, char * newargv[])
2652 {
2653         int i = 1;
2654
2655         if (vflag)
2656                 printf("begin parsing\n");
2657
2658         while (1)
2659         {
2660                 while (*buf && strchr(",\t\n\r\14 ", *buf))
2661                         buf++;
2662
2663                 /* test for eof */
2664                 if (*buf == '\0' || *buf == 26)
2665                 {
2666                         if (i == 0)
2667                         {
2668                                 printf("No commands in command file\n");
2669                                 return -1;
2670                         }
2671                         else
2672                         {
2673                                 return i;
2674                         }
2675                 }
2676
2677                 /* test for comment */
2678                 if (*buf == '#')
2679                 {
2680                         /* found a comment; skip to next \n and start over */
2681                         while (*buf && *buf != '\n')
2682                                 buf++;
2683
2684                         continue;
2685                 }
2686
2687                 if (i == MAXARGS)
2688                 {
2689                         printf("Too many arguments in command file\n");
2690                         return -1;
2691                 }
2692
2693                 newargv[i] = buf;
2694
2695                 while (!strchr(",\t\n\r\14 ", *buf))
2696                 {
2697                         if (*buf == '\0' || *buf == 26)
2698                         {
2699                                 printf("Finished parsing %d args\n", i);
2700                                 return i;
2701                         }
2702
2703                         buf++;
2704                 }
2705
2706                 *buf++ = '\0';
2707
2708                 if (vflag)
2709                         printf("argv[%d] = \"%s\"\n", i, newargv[i]);
2710
2711                 i++;
2712         }
2713 }
2714
2715
2716 //
2717 // Process in a link command file
2718 //
2719 int docmdfile(char * fname)
2720 {
2721         int fd;                                     // File descriptor
2722         unsigned size;                              // Command file size
2723         char * ptr;                                 // Pointer
2724         int newargc;                                // New argument count
2725         char * (*newargv)[];                        // New argument value array
2726
2727         // Verbose information
2728         if (vflag > 1)
2729                 printf("docmdfile(%s)\n", fname);
2730
2731         // Allocate memory for new argument values
2732         newargv = malloc((long)(sizeof(char *) * MAXARGS));
2733
2734         if (!newargv)
2735         {
2736                 printf("Out of memory.\n");
2737                 return 1;
2738         }
2739
2740         // Attempt to open and read in the command file
2741         if (fname)
2742         {
2743                 if ((fd = open(fname, _OPEN_FLAGS)) < 0)
2744                 {
2745                         printf("Cannot open command file %s.\n", fname);
2746                         return 1;
2747                 }
2748
2749                 size = FileSize(fd);
2750
2751                 if ((ptr = malloc(size + 1)) == NULL)
2752                 {
2753                         printf("Out of memory.\n");
2754                         close(fd);
2755                         return 1;
2756                 }
2757
2758                 if (read(fd, ptr, size) != (int)size)
2759                 {
2760                         printf("Read error on command file %s.\n", fname);
2761                         close(fd);
2762                         return 1;
2763                 }
2764
2765                 *(ptr + size) = 0;                      // Null terminate the buffer
2766                 close(fd);
2767         }
2768         else
2769         {
2770                 printf("No command filename specified\n");
2771                 return 1;
2772         }
2773
2774         // Parse the command file
2775         if ((newargc = parse(ptr, *newargv)) == -1)
2776         {
2777                 return 1;
2778         }
2779
2780         // Process the inputted flags
2781         if (doargs(newargc, *newargv))
2782         {
2783                 printf("docmdfile: doargs returns TRUE\n");
2784                 return 1;
2785         }
2786
2787         free(ptr);
2788         free(newargv);
2789
2790         return 0;
2791 }
2792
2793
2794 //
2795 // Take an argument list and parse the command line
2796 //
2797 int doargs(int argc, char * argv[])
2798 {
2799         int i = 1;                                      // Iterator
2800         int c;                                          // Command line character
2801         char * ifile, * isym;           // File name and symbol name for -i
2802
2803         // Parse through option switches & files
2804         while (i < argc)
2805         {
2806                 // Process command line switches
2807                 if (argv[i][0] == '-')
2808                 {
2809                         if (!argv[i][1])
2810                         {
2811                                 printf("Illegal option argument: %s\n\n", argv[i]);
2812                                 ShowHelp();
2813                                 return 1;
2814                         }
2815
2816                         c = argv[i++][1];                       // Get next character in command line
2817
2818                         // Process command line switch
2819                         switch (c)
2820                         {
2821                         case '?':                                       // Display usage information
2822                         case 'h':
2823                         case 'H':
2824                                 ShowVersion();
2825                                 ShowHelp();
2826                                 return 1;
2827                         case 'a':
2828                         case 'A':                                       // Set absolute linking on
2829                                 if (aflag)
2830                                         warn('a', 1);
2831
2832                                 if (i + 2 >= argc)
2833                                 {
2834                                         printf("Not enough arguments to -a\n");
2835                                         return 1;
2836                                 }
2837
2838                                 aflag = 1;                              // Set abs link flag
2839
2840                                 // Segment order is TEXT, DATA, BSS
2841                                 // Text segment can be 'r' or a value
2842                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2843                                 {
2844                                         ttype = -1;                     // TEXT segment is relocatable
2845                                 }
2846                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2847                                 {
2848                                         printf("Error in text-segment address: cannot be contiguous\n");
2849                                         return 1;
2850                                 }
2851                                 else if (GetHexValue(argv[i], &tval))
2852                                 {
2853                                         printf("Error in text-segment address: %s is not 'r' or an address.", argv[i]);
2854                                         return 1;
2855                                 }
2856
2857                                 i++;
2858
2859                                 // Data segment can be 'r', 'x' or a value
2860                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2861                                 {
2862                                         dtype = -1;                     // DATA segment is relocatable
2863                                 }
2864                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2865                                 {
2866                                         dtype = -2;                     // DATA follows TEXT
2867                                 }
2868                                 else if (GetHexValue(argv[i], &dval))
2869                                 {
2870                                         printf("Error in data-segment address: %s is not 'r', 'x' or an address.", argv[i]);
2871                                         return 1;
2872                                 }
2873
2874                                 i++;
2875
2876                                 // BSS segment can be 'r', 'x' or a value
2877                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2878                                 {
2879                                         btype = -1;                     // BSS segment is relocatable
2880                                 }
2881                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2882                                 {
2883                                         btype = -3;                     // BSS follows DATA
2884                                 }
2885                                 else if (GetHexValue(argv[i], &bval))
2886                                 {
2887                                         printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
2888                                         return 1;
2889                                 }
2890
2891                                 i++;
2892                                 break;
2893                         case 'b':
2894                         case 'B':                                       // Don't remove muliply defined locals
2895                                 if (bflag)
2896                                         warn('b', 1);
2897
2898                                 bflag = 1;
2899                                 break;
2900                         case 'c':
2901                         case 'C':                                       // Process a command file
2902                                 if (i == argc)
2903                                 {
2904                                         printf("Not enough arguments to -c\n");
2905                                         return 1;
2906                                 }
2907
2908                                 if (docmdfile(argv[i++]))
2909                                 {
2910                                         return 1;
2911                                 }
2912
2913                                 break;
2914                         case 'd':
2915                         case 'D':                                       // Wait for "return" before exiting
2916                                 if (dflag)
2917                                         warn('d', 0);
2918
2919                                 dflag = 1;
2920                                 waitflag = 1;
2921                                 break;
2922                         case 'e':
2923                         case 'E':                                       // Output COFF (absolute only)
2924                                 cflag = 1;
2925                                 break;
2926                         case 'g':
2927                         case 'G':                                       // Output source level debugging
2928                                 printf("\'g\' flag not currently implemented\n");
2929                                 gflag = 0;
2930                                 /*
2931                                 if (gflag) warn('g', 1);
2932                                 gflag = 1;
2933                                 */
2934                                 break;
2935                         case 'i':
2936                         case 'I':                                       // Include binary file
2937                                 if (i + 2 > argc)
2938                                 {
2939                                         printf("Not enough arguments to -i\n");
2940                                         return 1;
2941                                 }
2942
2943                                 ifile = argv[i++];
2944                                 isym = argv[i++];
2945
2946                                 // handle -ii (No truncation)
2947                                 if ((argv[i-3][2] == 'i') || (argv[i-3][2] == 'I'))
2948                                 {
2949                                         if (!cflag)
2950                                                 printf("warning: (-ii) COFF format output not specified\n");
2951                                 }
2952                                 // handle -i (Truncation)
2953                                 else
2954                                 {
2955                                         if (strlen(isym) > 7)
2956                                                 isym[7] = '\0';
2957                                 }
2958
2959                                 // Place include files in the DATA segment only
2960                                 if (DoFile(ifile, DSTSEG_D, isym))
2961                                         return 1;
2962
2963                                 break;
2964                         case 'l':
2965                         case 'L':                                       // Add local symbols
2966                                 if (lflag)
2967                                         warn('l', 1);
2968
2969                                 lflag = 1;
2970                                 break;
2971                         case 'm':
2972                         case 'M':                                       // Produce load symbol map
2973                                 if (mflag)
2974                                         warn('m', 1);
2975
2976                                 mflag = 1;
2977                                 break;
2978                         case 'n':
2979                         case 'N':                                       // Output no header to .abs file
2980                                 if (noheaderflag)
2981                                         warn('n', 1);
2982
2983                                 noheaderflag = 1;
2984                                 break;
2985                         case 'o':
2986                         case 'O':                                       // Specify an output file
2987                                 if (oflag)
2988                                         warn('o', 1);
2989
2990                                 oflag = 1;
2991
2992                                 if (i >= argc)
2993                                 {
2994                                         printf("No output filename following -o switch\n");
2995                                         return 1;
2996                                 }
2997
2998                                 if (strlen(argv[i]) > FARGSIZE - 5)
2999                                 {
3000                                         printf("Output file name too long (sorry!)\n");
3001                                         return 1;
3002                                 }
3003
3004                                 strcpy(ofile, argv[i++]);
3005                                 break;
3006                         case 'r':
3007                         case 'R':                                       // Section alignment size
3008                                 if (rflag)
3009                                         warn('r', 1);
3010
3011                                 rflag = 1;
3012
3013                                 switch (argv[i-1][2])
3014                                 {
3015                                         case 'w': case 'W': secalign = 1;  break; // Word alignment
3016                                         case 'l': case 'L': secalign = 3;  break; // Long alignment
3017                                         case 'p': case 'P': secalign = 7;  break; // Phrase alignment
3018                                         case 'd': case 'D': secalign = 15; break; // Double phrase alignment
3019                                         case 'q': case 'Q': secalign = 31; break; // Quad phrase alignment
3020                                         default:            secalign = 7;  break; // Default phrase alignment
3021                                 }
3022
3023                                 break;
3024                         case 's':
3025                         case 'S':                                       // Output only global symbols
3026                                 if (sflag)
3027                                         warn('s', 1);
3028
3029                                 sflag = 1;
3030                                 break;
3031                         case 'u':
3032                         case 'U':                                       // Undefined symbols
3033                                 uflag++;
3034                                 break;
3035                         case 'v':
3036                         case 'V':                                       // Verbose information
3037                                 if (!vflag && !versflag)
3038                                 {
3039                                         ShowVersion();
3040                                 }
3041
3042                                 vflag++;
3043                                 break;
3044                         case 'w':
3045                         case 'W':                                       // Show warnings flag
3046                                 if (wflag)
3047                                         warn('w', 1);
3048
3049                                 wflag = 1;
3050                                 break;
3051                         case 'z':
3052                         case 'Z':                                       // Suppress banner flag
3053                                 if (zflag)
3054                                         warn('z', 1);
3055
3056                                 zflag = 1;
3057                                 break;
3058                         default:
3059                                 printf("unknown option argument `%c'\n", c);
3060                                 return 1;
3061                         }
3062                 }
3063                 else
3064                 {
3065                         // Not a switch, then process as a file
3066                         if (DoFile(argv[i++], 0, NULL))
3067                                 return 1;
3068                 }
3069         }
3070
3071         if (!oflag && vflag)
3072         {
3073                 strcpy(ofile, "output");
3074                 printf("Output file is %s[.ext]\n", ofile);
3075         }
3076
3077         if (oflag && vflag)
3078                 printf("Output file is %s\n", ofile);
3079
3080         if (sflag)
3081                 lflag = 0;
3082
3083         // No problems encountered
3084         return 0;
3085 }
3086
3087
3088 //
3089 // Display version information
3090 //
3091 void ShowVersion(void)
3092 {
3093         if (displaybanner)// && vflag)
3094         {
3095                 printf("\nReboot's Linker for Atari Jaguar\n");
3096                 printf("Copyright (c) 199x Allan K. Pratt, 2014 Reboot\n");
3097                 printf("V%i.%i.%i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
3098         }
3099 }
3100
3101
3102 //
3103 // Display command line help
3104 //
3105 void ShowHelp(void)
3106 {
3107         printf("Usage:\n");
3108         printf("    %s [-options] file(s)\n", cmdlnexec);
3109         printf("\n");
3110         printf("Options:\n");
3111         printf("   -? or -h                display usage information\n");
3112         printf("   -a <text> <data> <bss>  output absolute file\n");
3113         printf("                           hex value: segment address\n");
3114         printf("                           r: relocatable segment\n");
3115         printf("                           x: contiguous segment\n");
3116         printf("   -b                      don't remove multiply defined local labels\n");
3117         printf("   -c <fname>              add contents of <fname> to command line\n");
3118         printf("   -d                      wait for key after link\n");
3119         printf("   -e                      output COF absolute file\n");
3120         printf("   -g                      output source-level debugging\n");
3121         printf("   -i <fname> <label>      incbin <fname> and set <label>\n");
3122         printf("   -l                      add local symbols\n");
3123         printf("   -m                      produce load symbols map\n");
3124         printf("   -n                      output no file header to .abs file\n");
3125         printf("   -o <fname>              set output name\n");
3126         printf("   -r<size>                section alignment size\n");
3127         printf("                           w: word (2 bytes)\n");
3128         printf("                           l: long (4 bytes)\n");
3129         printf("                           p: phrase (8 bytes, default alignment)\n");
3130         printf("                           d: double phrase (16 bytes)\n");
3131         printf("                           q: quad phrase (32 bytes)\n");
3132         printf("   -s                      output only global symbols\n");
3133         printf("   -u                      allow unresolved symbols (experimental)\n");
3134         printf("   -v                      set verbose mode\n");
3135         printf("   -w                      show linker warnings\n");
3136         printf("   -z                      suppress banner\n");
3137         printf("\n");
3138 }
3139
3140
3141 //
3142 // Application exit
3143 //
3144 void ExitLinker(void)
3145 {
3146         char tempbuf[128];
3147         char * c;
3148
3149         // Display link status if verbose mode
3150         if (vflag)
3151                 printf("Link %s.\n", errflag ? "aborted" : "complete");
3152
3153         // Wait for return key if requested
3154         if (waitflag)
3155         {
3156                 printf("\nPress the [RETURN] key to continue. ");
3157                 c = fgets(tempbuf, 128, stdin);
3158         }
3159
3160         exit(errflag);
3161 }
3162
3163
3164 int main(int argc, char * argv[])
3165 {
3166         char * s = NULL;                                // String pointer for "getenv"
3167         struct HREC * utemp;                    // Temporary hash record pointer
3168         struct OHEADER * header;                // Pointer to output header structure
3169
3170         cmdlnexec = argv[0];                    // Obtain executable name
3171         s = getenv("RLNPATH");
3172
3173         if (s)                                                  // Attempt to obtain env variable
3174                 strcpy(libdir, s);                      // Store it if found
3175
3176         // Initialize some vars
3177         tval = dval = bval = 0;
3178         ttype = dtype = btype = 0;
3179
3180         // Parse the command line
3181         if (doargs(argc, argv))
3182         {
3183                 errflag = 1;
3184                 ExitLinker();
3185         }
3186
3187         if (!zflag && !vflag)
3188         {
3189                 ShowVersion();                  // Display version information
3190                 versflag = 1;                           // We've dumped the version banner
3191         }
3192
3193         // Load in specified files/objects and add to processing list
3194         if (ProcessFiles())
3195         {
3196                 errflag = 1;
3197                 ExitLinker();
3198         }
3199
3200         // Work in items in processing list & deal with unresolved list
3201         if (ProcessLists())
3202         {
3203                 errflag = 1;
3204                 ExitLinker();
3205         }
3206
3207         // Check that there is something to link
3208         if (olist == NULL)
3209         {
3210                 ShowHelp();
3211                 ExitLinker();
3212         }
3213
3214         // Report unresolved externals
3215         if (unresolved != NULL)
3216         {
3217                 printf("UNRESOLVED SYMBOLS\n");
3218
3219                 // Don't list them if two -u's or more
3220                 if (uflag < 2)
3221                 {
3222                         utemp = unresolved;
3223
3224                         while (utemp != NULL)
3225                         {
3226                                 printf("\t%s (", utemp->h_sym);
3227                                 WriteARName(utemp->h_ofile);
3228                                 printf(")\n");
3229                                 utemp = utemp->h_next;
3230                         }
3231                 }
3232
3233                 if (!uflag)
3234                 {
3235                         errflag = 1;
3236                         ExitLinker();
3237                 }
3238         }
3239
3240         // Make one output file from input objs
3241         header = MakeOutputFile();
3242
3243         if (header == NULL)
3244         {
3245                 errflag = 1;
3246                 ExitLinker();
3247         }
3248
3249         // Partial linking
3250         if (pflag)
3251         {
3252                 printf("TO DO:Partial linking\n");
3253                 errflag = 1;
3254         }
3255         // Relocatable linking
3256         else if (!aflag)
3257         {
3258                 printf("TO DO:Relocatable linking\n");
3259                 errflag = 1;
3260         }
3261         // Absolute linking
3262         else
3263         {
3264                 if (vflag)
3265                 {
3266                         printf("Absolute linking ");
3267
3268                         if (cflag)
3269                                 printf("(COF)\n");
3270                         else
3271                                 printf("(ABS)\n");
3272                 }
3273
3274                 if (vflag > 1)
3275                         printf("Header magic is 0x%04X\n", (unsigned int)header->magic);
3276
3277                 if (WriteOutputFile(header))
3278                         errflag = 1;
3279         }
3280
3281         // Display the loaded symbols map
3282         if (mflag)
3283                 if (ShowSymbolLoadMap(header))
3284                         errflag = 1;
3285
3286         // Display segment size summary
3287         if (vflag)
3288         {
3289                 printf("\n");
3290                 printf("+---------+----------+----------+----------+\n");
3291                 printf("| Segment |     TEXT |     DATA |      BSS |\n");
3292                 printf("| Sizes   |----------+----------+----------|\n");
3293                 printf("| (Hex)   | %8X | %8X | %8X |\n", (unsigned int)header->tsize, (unsigned int)header->dsize, (unsigned int)header->bsize);
3294                 printf("+---------+----------+----------+----------+\n\n");
3295         }
3296
3297         free(header);
3298         ExitLinker();
3299 }
3300