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

   1 //
   2 // RLN - Reboot's Linker for the Atari Jaguar console system
   3 // Copyright (C) 199x, Allan K. Pratt, 2014-2018 Reboot & Friends
   4 //
   5
   6 #include "rln.h"
   7 //#include <assert.h>
   8
   9 unsigned errflag = 0;                           // Error flag, goes TRUE on error
  10 unsigned waitflag = 0;                          // Wait for any keypress flag
  11 unsigned versflag = 0;                          // Version banner has been shown flag
  12 unsigned aflag = 0;                                     // Absolute linking flag
  13 unsigned bflag = 0;                                     // Don't remove mulitply def locals flag
  14 unsigned cflag = 0;                                     // COF executable
  15 unsigned dflag = 0;                                     // Wait for key after link flag
  16 unsigned gflag = 0;                                     // Source level debug include flag
  17 unsigned lflag = 0;                                     // Add local symbols to output flag
  18 unsigned mflag = 0;                                     // Produce symbol load map flag
  19 unsigned oflag = 0;                                     // Output filename specified
  20 unsigned rflag = 0;                                     // Segment alignment size flag
  21 unsigned sflag = 0;                                     // Output only global symbols
  22 unsigned vflag = 0;                                     // Verbose flag
  23 unsigned wflag = 0;                                     // Show warnings flag
  24 unsigned zflag = 0;                                     // Suppress banner flag
  25 unsigned pflag = 0, uflag = 0;          // Unimplemented flags (partial link, don't abort on unresolved symbols)
  26 unsigned hd = 0;                                        // Index of next file handle to fill
  27 unsigned secalign = 7;                          // Section Alignment (8=phrase)
  28 unsigned tbase = 0;                                     // TEXT base address
  29 unsigned dbase = 0;                                     // DATA base address
  30 unsigned bbase = 0;                                     // BSS base address
  31 unsigned textoffset = 0;                        // COF TEXT segment offset
  32 unsigned dataoffset = 0;                        // COF DATA segment offset
  33 unsigned bssoffset = 0;                         // COF BSS segment offset
  34 unsigned displaybanner = 1;                     // Display version banner
  35 unsigned symoffset = 0;                         // Symbol table offset in output file
  36 unsigned dbgsymbase = 0;                        // Debug symbol base address
  37 int noheaderflag = 0;                           // No header flag for ABS files
  38 int hflags;                                                     // Value of the arg to -h option
  39 int ttype, dtype, btype;                        // Type flag: 0, -1, -2, -3, -4
  40 int tval, dval, bval;                           // Values of these abs bases
  41 int hflag[NHANDLES];                            // True for include files
  42 int handle[NHANDLES];                           // Open file handles
  43 int textsize, datasize, bsssize;        // Cumulative segment sizes
  44 char libdir[FARGSIZE * 3];                      // Library directory to search
  45 char ofile[FARGSIZE];                           // Output file name (.o)
  46 char * name[NHANDLES];                          // Associated file names
  47 char * cmdlnexec = NULL;                        // Executable name - pointer to ARGV[0]
  48 char * hsym1[SYMLEN];                           // First symbol for include files
  49 char * hsym2[SYMLEN];                           // Second symbol for include files
  50 struct OFILE * plist = NULL;            // Object image list pointer
  51 struct OFILE * plast;                           // Last object image list pointer
  52 struct OFILE * olist = NULL;            // Pointer to first object file in list
  53 struct OFILE * olast;                           // Pointer to last object file in list
  54 char * arPtr[512];
  55 uint32_t arIndex = 0;
  56 struct HREC * htable[NBUCKETS];         // Hash table
  57 struct HREC * unresolved = NULL;        // Pointer to unresolved hash list
  58 char * ost;                                                     // Output symbol table
  59 char * ost_ptr;                                         // Output symbol table; current pointer
  60 char * ost_end;                                         // Output symbol table; end pointer
  61 char * oststr;                                          // Output string table
  62 char * oststr_ptr;                                      // Output string table; current pointer
  63 char * oststr_end;                                      // Output string table; end pointer
  64 int ost_index = 0;                                      // Index of next ost addition
  65 uint8_t nullStr[1] = "\x00";            // Empty string
  66 struct HREC * arSymbol = NULL;          // Pointer to AR symbol table
  67
  68
  69 // Function prototypes
  70 struct HREC * LookupHREC(char *);
  71 char * PathTail(char *);
  72 void ShowHelp(void);
  73 void ShowVersion(void);
  74 int OSTLookup(char * sym);
  75 int OSTAdd(char * name, int type, long value);
  76 int ProcessFiles(void);
  77 int doargs(int argc, char * argv[]);
  78
  79
  80 //
  81 // Get a long word from memory
  82 //
  83 static inline uint32_t GetLong(uint8_t * src)
  84 {
  85         return (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
  86 }
  87
  88
  89 //
  90 // Put a long word into memory
  91 //
  92 static inline void PutLong(uint8_t * dest, uint32_t val)
  93 {
  94         *dest++ = (uint8_t)(val >> 24);
  95         *dest++ = (uint8_t)(val >> 16);
  96         *dest++ = (uint8_t)(val >> 8);
  97         *dest = (uint8_t)val;
  98 }
  99
 100
 101 //
 102 // Get a word from memory
 103 //
 104 static inline uint16_t GetWord(uint8_t * src)
 105 {
 106         return (src[0] << 8) | src[1];
 107 }
 108
 109
 110 //
 111 // Put a word into memory
 112 //
 113 static inline void PutWord(uint8_t * dest, uint16_t val)
 114 {
 115         *dest++ = (uint8_t)(val >> 8);
 116         *dest = (uint8_t)val;
 117 }
 118
 119
 120 //
 121 // Find passed in file's length in bytes
 122 // N.B.: This also resets the file's pointer to the start of the file
 123 //
 124 long FileSize(int fd)
 125 {
 126         long size = lseek(fd, 0, SEEK_END);
 127         lseek(fd, 0, SEEK_SET);
 128
 129         return size;
 130 }
 131
 132
 133 //
 134 // For this object file, add symbols to the output symbol table after
 135 // relocating them. Returns TRUE if OSTLookup returns an error (-1).
 136 //
 137 int DoSymbols(struct OFILE * ofile)
 138 {
 139         int type;
 140         long value;
 141         int index;
 142         int j;
 143         struct HREC * hptr;
 144         uint32_t tsoSave, dsoSave, bsoSave;
 145
 146         // Point to first symbol record in the object file
 147         char * symptr = (ofile->o_image + 32
 148                 + ofile->o_header.tsize
 149                 + ofile->o_header.dsize
 150                 + ofile->o_header.absrel.reloc.tsize
 151                 + ofile->o_header.absrel.reloc.dsize);
 152
 153         // Point to end of symbol record in the object file
 154         char * symend = symptr + ofile->o_header.ssize;
 155
 156         uint32_t tsegoffset = ofile->segBase[TEXT];
 157         uint32_t dsegoffset = ofile->segBase[DATA];
 158         uint32_t bsegoffset = ofile->segBase[BSS];
 159
 160         // Save segment vars, so we can restore them if needed
 161         tsoSave = tsegoffset, dsoSave = dsegoffset, bsoSave = bsegoffset;
 162
 163         // Process each record in the object's symbol table
 164         for(; symptr!=symend; symptr+=12)
 165         {
 166                 index = GetLong(symptr + 0);    // Obtain symbol string index
 167                 type  = GetLong(symptr + 4);    // Obtain symbol type
 168                 value = GetLong(symptr + 8);    // Obtain symbol value
 169
 170                 // Global/External symbols have a pre-processing stage
 171                 // N.B.: This destroys the t/d/bsegoffset discovered above. So if a
 172                 //       local symbol follows a global/exported one, it gets wrong
 173                 //       info! [Should be FIXED now]
 174                 if (type & 0x01000000)
 175                 {
 176                         // Obtain the string table index for the relocation symbol, look
 177                         // for it in the globals hash table to obtain information on that
 178                         // symbol.
 179                         hptr = LookupHREC(symend + index);
 180
 181                         if (hptr == NULL)
 182                         {
 183                                 // Try to find it in the OST
 184                                 int ostIndex = OSTLookup(symend + index);
 185
 186                                 if (ostIndex == -1)
 187                                 {
 188                                         printf("DoSymbols(): Symbol not found in hash table: '%s' (%s)\n", symend + index, ofile->o_name);
 189                                         return 1;
 190                                 }
 191
 192                                 if (vflag > 1)
 193                                         printf("DoSymbols(): Skipping symbol '%s' (%s) found in OST...\n", symend + index, ofile->o_name);
 194
 195                                 // If the symbol is not in any .a or .o units, it must be one
 196                                 // of the injected ones (_TEXT_E, _DATA_E, or _BSS_E), so skip
 197                                 // it [or maybe not? In verbose mode, we see nothing...!]
 198                                 continue;
 199                         }
 200
 201                         tsegoffset = hptr->h_ofile->segBase[TEXT];
 202                         dsegoffset = hptr->h_ofile->segBase[DATA];
 203                         bsegoffset = hptr->h_ofile->segBase[BSS];
 204
 205                         // Update type with global type
 206                         type = hptr->h_type;
 207
 208                         // Remove global flag if absolute
 209                         if (type == (T_GLBL | T_ABS))
 210                                 type = T_ABS;
 211
 212                         // If the global/external has a value then update that value in
 213                         // accordance with the segment sizes of the object file it
 214                         // originates from
 215                         if (hptr->h_value)
 216                         {
 217                                 switch (hptr->h_type & 0x0E000000)
 218                                 {
 219                                 case T_ABS:
 220                                 case T_TEXT:
 221                                         value = hptr->h_value;
 222                                         break;
 223                                 case T_DATA:
 224                                         value = hptr->h_value - hptr->h_ofile->o_header.tsize;
 225                                         break;
 226                                 case T_BSS:
 227                                         value = hptr->h_value
 228                                                 - (hptr->h_ofile->o_header.tsize
 229                                                 + hptr->h_ofile->o_header.dsize);
 230                                         break;
 231                                 default:
 232                                         if (vflag > 1)
 233                                                 printf("DoSymbols: No adjustment made for symbol: %s (%s) = %X\n", symend + index, ofile->o_name, hptr->h_value);
 234                                 }
 235                         }
 236                 }
 237                 // If *not* a global/external, use the info from passed in object
 238                 else
 239                         tsegoffset = tsoSave, dsegoffset = dsoSave, bsegoffset = bsoSave;
 240
 241                 // Process and update the value dependent on whether the symbol is a
 242                 // debug symbol or not
 243                 // N.B.: Debug symbols are currently not supported
 244                 if (type & 0xF0000000)
 245                 {
 246                         // DEBUG SYMBOL
 247                         // Set the correct debug symbol base address (TEXT segment)
 248 #if 0
 249                         dbgsymbase = 0;
 250
 251                         for(j=0; (unsigned)j<dosymi; j++)
 252                                 dbgsymbase += obj_segsize[j][0];
 253 #else
 254                         dbgsymbase = ofile->segBase[TEXT];
 255 #endif
 256
 257                         switch (type & 0xFF000000)
 258                         {
 259                         case 0x64000000:
 260                                 value = tval + dbgsymbase;
 261                                 break;
 262                         case 0x44000000:
 263                         case 0x46000000:
 264                         case 0x48000000:
 265                                 value = tval + dbgsymbase + value;
 266                         default:
 267                                 break;
 268                         }
 269
 270                         PutLong(symptr + 8, value);
 271                 }
 272                 else
 273                 {
 274                         // NON-DEBUG SYMBOL
 275                         // Now make modifications to the symbol value, local or global,
 276                         // based on the segment sizes of the object file currently being
 277                         // processed.
 278                         switch (type & T_SEG)
 279                         {
 280                         case T_ABS:
 281                                 break;
 282                         case T_TEXT:
 283                                 value = tbase + tsegoffset + value;
 284                                 PutLong(symptr + 8, value);
 285                                 break;
 286                         case T_DATA:
 287                                 if (type & T_GLBL)
 288                                         value = dbase + dsegoffset + value;
 289                                 else
 290                                         value = dbase + dsegoffset + (value
 291                                                 - ofile->o_header.tsize);
 292
 293                                 PutLong(symptr + 8, value);
 294                                 break;
 295                         case T_BSS:
 296                                 if (type & T_GLBL)
 297                                         value = bbase + bsegoffset + value;
 298                                 else
 299                                         value = bbase + bsegoffset
 300                                                 + (value - (ofile->o_header.tsize
 301                                                 + ofile->o_header.dsize));
 302
 303                                 PutLong(symptr + 8, value);
 304                                 break;
 305                         default:
 306                                 break;
 307                         }
 308                 }
 309
 310                 // Add to output symbol table if global/extern, or local flag is set
 311                 if (isglobal(type) || lflag)
 312                 {
 313                         if (vflag > 1)
 314                                 printf("DoSymbols: Adding symbol: %s (%s) to OST...\n", symend + index, ofile->o_name);
 315
 316                         index = OSTAdd(symend + index, type, value);
 317
 318                         if (index == -1)
 319                         {
 320                                 printf("DoSymbols(): Failed to add symbol '%s' to OST!\n", symend + index);
 321                                 return 1;
 322                         }
 323                 }
 324         }
 325
 326         return 0;
 327 }
 328
 329
 330 //
 331 // Free up hash memory
 332 //
 333 void FreeHashes(void)
 334 {
 335         int i;
 336
 337         for(i=0; i<NBUCKETS; i++)
 338         {
 339                 struct HREC * hptr = htable[i];
 340
 341                 while (hptr)
 342                 {
 343                         struct HREC * htemp = hptr->h_next;
 344                         free(hptr);
 345                         hptr = htemp;
 346                 }
 347         }
 348 }
 349
 350
 351 //
 352 // Add all global and external symbols to the output symbol table
 353 // [This is confusing--is it adding globals or locals? common == local!
 354 //  but then again, we see this in the header:
 355 //  #define T_COMMON  (T_GLOBAL | T_EXTERN) but that could be just bullshit.]
 356 //
 357 // Common symbols have a different number in the "value" field of the symbol
 358 // table (!0) than purely external symbols do (0). So you have to look at the
 359 // type (T_GLBL) *and* the value to determine if it's a common symbol.
 360 //
 361 long DoCommon(void)
 362 {
 363         struct HREC * hptr;
 364         int i;
 365
 366         for(i=0; i<NBUCKETS; i++)
 367         {
 368                 for(hptr=htable[i]; hptr!=NULL; hptr=hptr->h_next)
 369                 {
 370 //NO!                   if (iscommon(hptr->h_type))
 371                         if (isglobal(hptr->h_type))// || isextern(hptr->h_type))
 372                         {
 373 // Skip if in *.a file... (does nothing)
 374 //if (hptr->h_ofile->isArchiveFile)
 375 //      continue;
 376
 377 //Is this true? Couldn't an absolute be exported???
 378                                 if (hptr->h_type == (T_GLBL | T_ABS))
 379                                         hptr->h_type = T_ABS;   // Absolutes *can't* be externals
 380
 381                                 if (OSTAdd(hptr->h_sym, hptr->h_type, hptr->h_value) == -1)
 382                                         return -1;
 383                         }
 384                 }
 385         }
 386
 387         return 0;
 388 }
 389
 390
 391 //
 392 // Add a symbol's name, type, and value to the OST.
 393 // Returns the index of the symbol in OST, or -1 for error.
 394 //
 395 int OSTAdd(char * name, int type, long value)
 396 {
 397         int ost_offset_p, ost_offset_e = 0;     // OST table offsets for position calcs
 398         int ostresult;                                          // OST index result
 399         int slen = strlen(name);
 400
 401         // If the OST or OST string table has not been initialised then do so
 402         if (ost_index == 0)
 403         {
 404                 ost = malloc(OST_BLOCK);
 405                 oststr = malloc(OST_BLOCK);
 406
 407                 if (ost == NULL)
 408                 {
 409                         printf("OST memory allocation error.\n");
 410                         return -1;
 411                 }
 412
 413                 if (oststr == NULL)
 414                 {
 415                         printf("OSTSTR memory allocation error.\n");
 416                         return -1;
 417                 }
 418
 419                 ost_ptr = ost;                                          // Set OST start pointer
 420                 ost_end = ost + OST_BLOCK;                      // Set OST end pointer
 421
 422                 PutLong(oststr, 0x00000004);            // Just null long for now
 423                 oststr_ptr = oststr + 4;                        // Skip size of str table long (incl null long)
 424                 PutLong(oststr_ptr, 0x00000000);        // Null terminating long
 425                 oststr_end = oststr + OST_BLOCK;
 426         }
 427         else
 428         {
 429                 // If next symbol record exceeds current allocation then expand symbol
 430                 // table and/or symbol string table.
 431                 ost_offset_p = (ost_ptr - ost);
 432                 ost_offset_e = (ost_end - ost);
 433
 434                 // 3 x uint32_t (12 bytes)
 435                 if ((ost_ptr + 12) > ost_end)
 436                 {
 437                         // We want to allocate the current size of the OST + another block.
 438                         ost = realloc(ost, ost_offset_e + OST_BLOCK);
 439
 440                         if (ost == NULL)
 441                         {
 442                                 printf("OST memory reallocation error.\n");
 443                                 return -1;
 444                         }
 445
 446                         ost_ptr = ost + ost_offset_p;
 447                         ost_end = (ost + ost_offset_e) + OST_BLOCK;
 448                 }
 449
 450                 ost_offset_p = (oststr_ptr - oststr);
 451                 ost_offset_e = (oststr_end - oststr);
 452
 453                 // string length + terminating NULL + uint32_t (terminal long)
 454                 if ((oststr_ptr + (slen + 1 + 4)) > oststr_end)
 455                 {
 456                         oststr = realloc(oststr, ost_offset_e + OST_BLOCK);
 457
 458                         if (oststr == NULL)
 459                         {
 460                                 printf("OSTSTR memory reallocation error.\n");
 461                                 return -1;
 462                         }
 463
 464                         oststr_ptr = oststr + ost_offset_p;
 465                         oststr_end = (oststr + ost_offset_e) + OST_BLOCK;
 466                 }
 467         }
 468
 469         // If this is a debug symbol and the include debug symbol flag (-g) is not
 470         // set then do nothing
 471         if ((type & 0xF0000000) && !gflag)
 472         {
 473                 // Do nothing
 474                 return 0;
 475         }
 476
 477         // Get symbol index in OST, if any (-1 if not found)
 478         ostresult = OSTLookup(name);
 479
 480         // If the symbol is in the output symbol table and the bflag is set
 481         // (don't remove multiply defined locals) and this is not an
 482         // external/global symbol *** OR *** the symbol is not in the output
 483         // symbol table then add it.
 484         if (((ostresult != -1) && bflag && !(type & 0x01000000))
 485                 || ((ostresult != -1) && gflag && (type & 0xF0000000))
 486                 || (ostresult == -1))
 487         {
 488                 if ((type & 0xF0000000) == 0x40000000)
 489                         PutLong(ost_ptr, 0x00000000);   // Zero string table offset for dbg line
 490                 else
 491                         PutLong(ost_ptr, (oststr_ptr - oststr));        // String table offset of symbol string
 492
 493                 PutLong(ost_ptr + 4, type);
 494                 PutLong(ost_ptr + 8, value);
 495                 ost_ptr += 12;
 496
 497                 // If the symbol type is anything but a debug line information
 498                 // symbol then write the symbol string to the string table
 499                 if ((type & 0xF0000000) != 0x40000000)
 500                 {
 501                         strcpy(oststr_ptr, name);               // Put symbol name in string table
 502                         *(oststr_ptr + slen) = '\0';    // Add null terminating character
 503                         oststr_ptr += (slen + 1);
 504                         PutLong(oststr_ptr, 0x00000000);        // Null terminating long
 505                         PutLong(oststr, (oststr_ptr - oststr)); // Update size of string table
 506                 }
 507
 508                 if (vflag > 1)
 509                         printf("OSTAdd: (%s), type=$%08X, val=$%08lX\n", name, type, value);
 510
 511 // is ost_index pointing one past?
 512 // does this return the same regardless of if its ++n or n++?
 513 // no. it returns the value of ost_index *before* it's incremented.
 514                 return ++ost_index;
 515         }
 516
 517         return ostresult;
 518 }
 519
 520
 521 //
 522 // Return the index of a symbol in the output symbol table
 523 // N.B.: This is a 1-based index! (though there's no real reason for it to be)
 524 //
 525 int OSTLookup(char * sym)
 526 {
 527         int i;
 528         int stro = 4;           // Offset in string table
 529
 530         for(i=0; i<ost_index; i++)
 531         {
 532                 if (strcmp(oststr + stro, sym) == 0)
 533                         return i + 1;
 534
 535                 stro += strlen(oststr + stro) + 1;
 536         }
 537
 538         return -1;
 539 }
 540
 541
 542 //
 543 // Add unresolved externs to the output symbol table
 544 // N.B.: Only adds unresolved symbols *if* they're not already in the OST
 545 //
 546 int DoUnresolved(void)
 547 {
 548         struct HREC * hptr = unresolved;
 549
 550         // Add to OST while unresolved list is valid
 551         while (hptr != NULL)
 552         {
 553                 if (OSTAdd(hptr->h_sym, T_GLBL, 0L) == -1)
 554                         return 1;
 555
 556                 if (vflag > 1)
 557                         printf("DoUnresolved(): '%s' (%s:$%08X) in OST\n", hptr->h_sym, hptr->h_ofile->o_name, hptr->h_type);
 558
 559                 struct HREC * htemp = hptr->h_next;
 560                 free(hptr);
 561                 hptr = htemp;
 562         }
 563
 564         unresolved = NULL;
 565         return 0;
 566 }
 567
 568
 569 //
 570 // Update object file TEXT and DATA segments based on relocation records. Take
 571 // in an OFILE header and flag (T_TEXT, T_DATA) to process. Return (0) is
 572 // successful or non-zero (1) if failed.
 573 //
 574 int RelocateSegment(struct OFILE * ofile, int flag)
 575 {
 576         char * symtab;                  // Start of symbol table
 577         char * symbols;                 // Start of symbols
 578         char * sptr;                    // Start of segment data
 579         char * rptr;                    // Start of segment relocation records
 580         unsigned symidx;                // Offset to symbol
 581         unsigned addr;                  // Relocation address
 582         unsigned rflg;                  // Relocation flags
 583         unsigned olddata;               // Old segment data at reloc address
 584         unsigned newdata = 0;   // New segment data at reloc address
 585         unsigned pad;                   // Temporary to calculate phrase padding
 586         int i;                                  // Iterator
 587         char sym[SYMLEN];               // String for symbol name/hash search
 588         int ssidx;                              // Segment size table index
 589         unsigned glblreloc;             // Global relocation flag
 590         unsigned absreloc;              // Absolute relocation flag
 591         unsigned relreloc;              // Relative relocation flag
 592         unsigned wordreloc;             // Relocate word only flag
 593         unsigned opreloc;               // Relocate OP data address only flag
 594         unsigned swcond;                // Switch statement condition
 595         unsigned relocsize;             // Relocation record size
 596         unsigned saveBits;              // OP data leftover bits save
 597         unsigned saveBits2;
 598
 599         // If there is no TEXT relocation data for the selected object file segment
 600         // then update the COF TEXT segment offset allowing for the phrase padding
 601         if ((flag == T_TEXT) && !ofile->o_header.absrel.reloc.tsize)
 602         {
 603                 // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
 604                 return 0;
 605         }
 606
 607         // If there is no DATA relocation data for the selected object file segment
 608         // then update the COF DATA and BSS segment offsets allowing for the phrase
 609         // padding
 610         if ((flag == T_DATA) && !ofile->o_header.absrel.reloc.dsize)
 611         {
 612                 // SCPCD : the T_DATA is the last section of the file, we can now increment the textoffset, dataoffset and bssoffset
 613
 614                 // TEXT segment size plus padding
 615                 pad = ((ofile->o_header.tsize + secalign) & ~secalign);
 616                 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
 617
 618                 if (vflag > 1)
 619                         printf("RelocateSegment(%s, TEXT) : No relocation data\n", ofile->o_name);
 620
 621                 // DATA segment size plus padding
 622                 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
 623                 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
 624
 625                 // BSS segment size plus padding
 626                 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
 627                 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
 628
 629                 if (vflag > 1)
 630                         printf("RelocateSegment(%s, DATA) : No relocation data\n", ofile->o_name);
 631
 632                 return 0;
 633         }
 634
 635         if (vflag > 1)
 636                 printf("RelocateSegment(%s, %s) : Processing Relocation Data\n",
 637                         ofile->o_name, flag == T_DATA ? "DATA" : "TEXT");
 638
 639         // Obtain pointer to start of symbol table
 640         symtab = (ofile->o_image + 32 + ofile->o_header.tsize
 641                 + ofile->o_header.dsize
 642                 + ofile->o_header.absrel.reloc.tsize
 643                 + ofile->o_header.absrel.reloc.dsize);
 644
 645         // Obtain pointer to start of symbols
 646         symbols = symtab + ofile->o_header.ssize;
 647
 648         // Obtain pointer to start of TEXT segment
 649         sptr = ofile->o_image + 32;
 650
 651         // Obtain pointer to start of TEXT relocation records
 652         rptr = sptr + (ofile->o_header.tsize + ofile->o_header.dsize);
 653
 654         relocsize = ofile->o_header.absrel.reloc.tsize;
 655
 656     if (vflag)
 657         printf("RELOCSIZE :: %d  Records = %d\n", relocsize, relocsize / 8);
 658
 659         // Update pointers if DATA relocation records are being processed
 660         if (flag == T_DATA)
 661         {
 662                 sptr += ofile->o_header.tsize;              // Start of DATA segment
 663                 rptr += ofile->o_header.absrel.reloc.tsize; // Start of DATA relocation records
 664                 relocsize = ofile->o_header.absrel.reloc.dsize;
 665         }
 666
 667         // Process each relocation record for the TEXT segment
 668         for(i=0; i<(int)relocsize; i+=8)
 669         {
 670                 // Obtain both the relocation address and the relocation flags from the
 671                 // object file image
 672                 addr = GetLong(rptr);
 673                 rflg = GetLong(rptr + 4);
 674                 glblreloc = (rflg & 0x00000010 ? 1 : 0);// Set global relocation flag
 675                 absreloc  = (rflg & 0x00000040 ? 1 : 0); // Set absolute relocation flag
 676                 relreloc  = (rflg & 0x000000A0 ? 1 : 0); // Set relative relocation flag
 677                 wordreloc = (rflg & 0x00000002 ? 1 : 0); // Set word relocation flag
 678                 opreloc   = (rflg & 0x00000004 ? 1 : 0); // Set OP relocation flag
 679
 680                 // Additional processing required for global relocations
 681                 if (glblreloc)
 682                 {
 683                         // Obtain the string table index for the relocation symbol, look
 684                         // for it in the globals hash table to obtain information on that
 685                         // symbol. For the hash calculation to work correctly it must be
 686                         // placed in a 'clean' string before looking it up.
 687                         symidx = GetLong(symtab + ((rflg >> 8) * 12));
 688                         memset(sym, 0, SYMLEN);
 689                         strcpy(sym, symbols + symidx);
 690                         olddata = newdata = 0;   // Initialise old and new segment data
 691                         ssidx = OSTLookup(sym);
 692                         newdata = GetLong(ost + ((ssidx - 1) * 12) + 8);
 693                 }
 694
 695                 // Obtain the existing long word (or word) segment data and flip words
 696                 // if the relocation flags indicate it relates to a RISC MOVEI
 697                 // instruction
 698                 olddata = (wordreloc ? GetWord(sptr + addr) : GetLong(sptr + addr));
 699
 700                 // If it's a OP QUAD relocation, get the data out of the DATA bits.
 701                 // Note that because we can't afford to lose the bottom 3 bits of the
 702                 // relocation record, we lose 3 off the top--which means the maximum
 703                 // this can store is $1FFFF8 (vs. $FFFFF8).
 704                 if (opreloc)
 705                 {
 706                         saveBits2 = (GetLong(sptr + addr + 8) & 0xE0000000) >> 8; // Upper 3 of data addr
 707                         saveBits = olddata & 0x7FF;
 708                         olddata = (olddata & 0xFFFFF800) >> 11;
 709                         olddata |= saveBits2; // Restore upper 3 bits of data addr
 710                 }
 711
 712                 if (rflg & 0x01)
 713                         olddata = _SWAPWORD(olddata);
 714
 715                 // Process record dependant on segment it relates to; TEXT, DATA or
 716                 // BSS. Construct a new relocated segment long word based on the
 717                 // required segment base address, the segment data offset in the
 718                 // resulting COF file and the offsets from the incoming object file.
 719                 swcond = (rflg & 0xFFFFFF00);
 720
 721                 if (!glblreloc)
 722                 {
 723                         switch (swcond)
 724                         {
 725                         case 0x00000200:          // Absolute Value
 726                                 break;
 727                         case 0x00000400:          // TEXT segment relocation record
 728                                 // SCPCD : the symbol point to a text segment, we should use the textoffset
 729                                 newdata = tbase + textoffset + olddata;
 730
 731                                 break;
 732                         case 0x00000600:          // DATA segment relocation record
 733                                 newdata = dbase + dataoffset
 734                                         + (olddata - ofile->o_header.tsize);
 735
 736                                 break;
 737                         case 0x00000800:          // BSS segment relocation record
 738                                 newdata = bbase + bssoffset
 739                                         + (olddata - (ofile->o_header.tsize
 740                                         + ofile->o_header.dsize));
 741
 742                                 break;
 743                         }
 744                 }
 745                 else
 746                 {
 747                         if (!relreloc)
 748                                 newdata += olddata;
 749                 }
 750
 751                 // Set absolute (long) or relative (word) address of symbol
 752                 if (absreloc)
 753                 {
 754                         // Flip the new long word segment data if the relocation record
 755                         // indicated a RISC MOVEI instruction and place the resulting data
 756                         // back in the COF segment
 757                         if (rflg & 0x01)
 758                                 newdata = _SWAPWORD(newdata);
 759
 760                         if (wordreloc)
 761                                 PutWord(sptr + addr, newdata);
 762                         else if (opreloc)
 763                         {
 764                                 if (vflag > 1)
 765                                         printf("OP reloc: oldata=$%X, newdata=$%X\n", olddata, newdata);
 766
 767                                 newdata = ((newdata & 0x00FFFFF8) << 8) | saveBits;
 768                                 PutLong(sptr + addr, newdata);
 769                                 // Strip out extraneous data hitchhikers from 2nd phrase...
 770                                 newdata = GetLong(sptr + addr + 8) & 0x007FFFFF;
 771                                 PutLong(sptr + addr + 8, newdata);
 772                         }
 773                         else
 774                                 PutLong(sptr + addr, newdata);
 775                 }
 776                 else if (relreloc)
 777                 {
 778                         PutWord(sptr + addr, newdata - tbase - addr - ofile->o_tbase);
 779                 }
 780
 781                 // Shamus: Let's output some info to aid in debugging this crap
 782                 if (vflag > 1)
 783                 {
 784                         char ssiString[128];
 785                         ssiString[0] = 0;
 786
 787                         if (glblreloc)
 788                                 sprintf(ssiString, " [ssi:%i]", ssidx);
 789
 790                         printf("RelocateSegment($%08X): %s, $%08X: $%08X => $%08X%s\n", rflg, (glblreloc ? sym : "(LOCAL)"), addr, olddata, GetLong(sptr + addr), ssiString);
 791                 }
 792
 793                 rptr += 8;     // Point to the next relocation record
 794         }
 795
 796         // Update the COF segment offset allowing for the phrase padding.
 797         // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
 798         if (flag == T_DATA)
 799         {
 800                 // TEXT segment plus padding
 801                 pad = ((ofile->o_header.tsize + secalign) & ~secalign);
 802                 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
 803
 804                 // DATA segment plus padding
 805                 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
 806                 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
 807
 808                 // BSS segment plus padding
 809                 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
 810                 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
 811         }
 812
 813         // Return value, should always be zero
 814         return 0;
 815 }
 816
 817
 818 //
 819 // Add a path character to the end of string 's' if it doesn't already end with
 820 // one. The last occurrance of '/' or '\' in the string is assumed to be the
 821 // path character.
 822 //
 823 // This is fucking shit. We know what the path delimiter is, its FUCKING
 824 // DEFINED IN THE FUCKING HEADER. FOR FUCKS SAKE. AND YES, HOPE TO GOD THERE'S
 825 // ENOUGH SPACE IN THE PASSED IN BUFFER TO HOLD THE EXTRA CHARACTER!
 826 //
 827 void AppendPathDelimiter(char * s)
 828 {
 829 #if 0
 830         // And hope to God that there's enough space in the buffer...
 831         char pathchar = 0;
 832
 833         while (*s)
 834         {
 835                 if (*s == '/' || *s == '\\')
 836                         pathchar = *s;
 837
 838                 s++;
 839         }
 840
 841         s--;
 842
 843         if (*s == pathchar)
 844                 return;
 845
 846         *++s = pathchar;
 847         *++s = 0;
 848 #else
 849         int length = strlen(s);
 850
 851         if (s[length - 1] != PATH_DELIMITER)
 852         {
 853                 s[length] = PATH_DELIMITER;
 854                 s[length + 1] = 0;      // BUFFER OVERFLOW!!!! FFFFFFFFUUUUUUUUUUUU
 855         }
 856 #endif
 857 }
 858
 859
 860 //
 861 // Try to open "name", "name.o", "${libdir}name", "${libdir}name.o". Return the
 862 // handle of the file successfully opened. p_name is updated to point to a
 863 // malloc()'ed string which is the name which actually got opened. p_name will
 864 // return unchanged if the file can't be found.
 865 //
 866 int TryOpenFile(char ** p_name)
 867 {
 868         char * name = *p_name;
 869
 870         // Note that libdir will be an empty string if there is none specified
 871         char * tmpbuf = malloc(strlen(name) + strlen(libdir) + 3);
 872
 873         if (tmpbuf == NULL)
 874         {
 875                 printf("TryOpenFile() : out of memory\n");
 876                 return -1;
 877         }
 878
 879         strcpy(tmpbuf, name);
 880         int hasdot = (strrchr(tmpbuf, '.') > strrchr(tmpbuf, PATH_DELIMITER));
 881         // Try to open file as passed first
 882         int fd = open(tmpbuf, _OPEN_FLAGS);
 883
 884         if (fd >= 0)
 885                 goto ok;
 886
 887         if (!hasdot)
 888         {
 889                 // Try to open file with '.o' added
 890                 strcat(tmpbuf, ".o");
 891                 fd = open(tmpbuf, _OPEN_FLAGS);
 892
 893                 if (fd >= 0)
 894                         goto ok;
 895         }
 896
 897         // Try the libdir only if the name isn't already anchored
 898         // Shamus: WTH, this makes no sense... Why the ':'? Is this a Macintosh??
 899 //      if (*name != '/' && *name != '\\' && !strchr(name, ':'))
 900         if ((*name != PATH_DELIMITER) && (strchr(name, ':') == NULL))
 901         {
 902                 strcpy(tmpbuf, libdir);
 903                 // Add a trailing path char if there isn't one already
 904                 AppendPathDelimiter(tmpbuf);
 905                 strcat(tmpbuf, name);
 906
 907                 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
 908                         goto ok;
 909
 910                 if (!hasdot)
 911                 {
 912                         strcat(tmpbuf, ".o");
 913
 914                         if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
 915                                 goto ok;
 916                 }
 917         }
 918
 919         // Couldn't open file at all
 920         return -1;
 921
 922 // There are worse things... :-P
 923 ok:
 924         tmpbuf = realloc(tmpbuf, strlen(tmpbuf) + 1);
 925
 926         if (tmpbuf == NULL)
 927         {
 928                 printf("TryOpenFile() : out of memory\n");
 929                 return -1;
 930         }
 931
 932         *p_name = tmpbuf;
 933         return fd;
 934 }
 935
 936
 937 //
 938 // What it says on the tin
 939 //
 940 void WriteARName(struct OFILE * p)
 941 {
 942         int flag = *(p->o_arname);
 943         printf("%s%s%s", (flag ? (char *)(p->o_arname) : ""), (flag ? ":" : ""), p->o_name);
 944 }
 945
 946
 947 //
 948 // Collect file names and handles in a buffer so there is less disk activity.
 949 // Call DoFile with flag FALSE for normal object files and archives.
 950 // Call it with flag TRUE and a symbol name for include files (-i).
 951 //
 952 int DoFile(char * fname, int incFlag, char * sym)
 953 {
 954         // Verbose information
 955         if (vflag)
 956         {
 957                 printf("DoFile() : `%s' %s", fname, incFlag ? "INCLUDE" : "NORMAL");
 958
 959                 if (incFlag)
 960                         printf(" symbol %s", sym);
 961
 962                 printf("\n");
 963         }
 964
 965         // Reached maximum file handles
 966         if (hd == NHANDLES)
 967         {
 968                 if (ProcessFiles())
 969                         return 1;
 970         }
 971
 972         // Attempt to open input file
 973         int fd = TryOpenFile(&fname);
 974
 975         if (fd < 0)
 976         {
 977                 printf("Cannot find input module %s\n", fname);
 978                 return 1;
 979         }
 980
 981         // The file is open; save its info in the handle and name arrays
 982         handle[hd] = fd;
 983         name[hd] = fname;               // This is the name from TryOpenFile()
 984         hflag[hd] = incFlag;
 985
 986         // Include files
 987         if (incFlag)
 988         {
 989                 int temp = strlen(sym);         // Get symbol length
 990
 991                 // 100 chars is max length of a symbol
 992                 if (temp > 99)
 993                 {
 994                         sym[99] = '\0';
 995                         temp = 99;
 996                 }
 997
 998                 // Malloc enough space for two symbols, then build the second one.
 999                 // Second one may be one character longer than first
1000                 if ((hsym1[hd] = malloc((long)temp + 1)) == NULL
1001                         || (hsym2[hd] = malloc((long)temp + 2)) == NULL)
1002                 {
1003                         printf("DoFile() : out of memory for include-file symbols\n");
1004                         return 1;
1005                 }
1006
1007                 strcpy(hsym1[hd], sym);
1008                 strcpy(hsym2[hd], sym);
1009
1010                 if (temp == 99)
1011                 {
1012                         if (sym[99] == 'x')
1013                         {
1014                                 printf("Last char of %s is already 'x': choose another name\n", sym);
1015                                 return 1;
1016                         }
1017
1018                         hsym2[hd][99] = 'x';
1019                 }
1020                 else
1021                 {
1022                         hsym2[hd][temp] = 'x';
1023                         hsym2[hd][temp+1] = '\0';
1024                 }
1025         }
1026
1027         // Increment next handle index
1028         hd++;
1029         // No problems
1030         return 0;
1031 }
1032
1033
1034 //
1035 // Pad TEXT or DATA segment to the requested boundary
1036 //
1037 int PadSegment(FILE * fd, long segsize, int value)
1038 {
1039         int i;
1040         char padarray[32];
1041         char * padptr;
1042
1043         // Determine the number of padding bytes that are needed
1044         long padsize = (segsize + secalign) & ~secalign;
1045         padsize = padsize - segsize;
1046
1047         // Fill pad array if padding is required
1048         if (padsize)
1049         {
1050                 padptr = padarray;
1051
1052                 for(i=0; i<16; i++)
1053                 {
1054                         PutWord(padptr, value);
1055                         padptr += 2;
1056                 }
1057
1058                 symoffset += padsize;
1059
1060                 // Write padding bytes
1061                 if (fwrite(padarray, padsize, 1, fd) != 1)
1062                         return 1;
1063         }
1064
1065         return 0;
1066 }
1067
1068
1069 //
1070 // Write the output file
1071 //
1072 int WriteOutputFile(struct OHEADER * header)
1073 {
1074         unsigned osize;                                         // Object segment size
1075         struct OFILE * otemp;                           // Object file pointer
1076         int i, j;                                                       // Iterators
1077         char himage[0x168];                                     // Header image (COF = 0xA8)
1078         uint32_t tsoff, dsoff, bsoff;           // Segment offset values
1079         unsigned index, type, value;            // Symbol table index, type and value
1080         short abstype;                                          // ABS symbol type
1081         char symbol[14];                                        // Symbol record for ABS files
1082         int slen;                                                       // Symbol string length
1083
1084         symoffset = 0;                                          // Initialise symbol offset
1085
1086         // Add correct output extension if none
1087         if (strchr(ofile, '.') == NULL)
1088         {
1089                 if (aflag && cflag)
1090                         strcat(ofile, ".cof");          // COF files (a type of abs)
1091                 else if (aflag && !cflag)
1092                         strcat(ofile, ".abs");          // ABS files
1093                 else
1094                         strcat(ofile, ".o");            // Object files (partial linking, etc)
1095         }
1096
1097         FILE * fd = fopen(ofile, "wb");         // Attempt to open output file
1098
1099         if (!fd)
1100         {
1101                 printf("Can't open output file %s\n", ofile);
1102                 return 1;
1103         }
1104
1105         // Build the output file header
1106         // Absolute (COF) header
1107         if (cflag)
1108         {
1109                 tsoff = dsoff = bsoff = 0xA8;   // Initialises segment offsets
1110
1111                 // Process each object file segment size to obtain a cumulative segment
1112                 // size for both the TEXT and DATA segments
1113                 for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1114                 {
1115                         dsoff += otemp->segSize[TEXT];
1116                         bsoff += otemp->segSize[TEXT] + otemp->segSize[DATA];
1117                 }
1118
1119                 // Currently this only builds a COF absolute file. Conditionals and
1120                 // additional code will need to be added for ABS and partial linking.
1121
1122                 // Build the COF_HDR
1123                 PutWord(himage + 0,   0x0150               ); // Magic Number (0x0150)
1124                 PutWord(himage + 2,   0x0003               ); // Sections Number (3)
1125                 PutLong(himage + 4,   0x00000000           ); // Date (0L)
1126                 PutLong(himage + 8,   dsoff + header->dsize); // Offset to Symbols Section
1127                 PutLong(himage + 12,  ost_index);             // Number of Symbols
1128                 PutWord(himage + 16,  0x001C               ); // Size of RUN_HDR (0x1C)
1129                 PutWord(himage + 18,  0x0003               ); // Executable Flags (3)
1130
1131                 // Build the RUN_HDR
1132                 PutLong(himage + 20,  0x00000107           ); // Magic/vstamp
1133                 PutLong(himage + 24,  header->tsize        ); // TEXT size in bytes
1134                 PutLong(himage + 28,  header->dsize        ); // DATA size in bytes
1135                 PutLong(himage + 32,  header->bsize        ); // BSS size in bytes
1136                 PutLong(himage + 36,  tbase                ); // Start of executable, normally @TEXT
1137                 PutLong(himage + 40,  tbase                ); // @TEXT
1138                 PutLong(himage + 44,  dbase                ); // @DATA
1139
1140                 // Build the TEXT SEC_HDR
1141                 PutLong(himage + 48,  0x2E746578           );
1142                 PutLong(himage + 52,  0x74000000           ); // ".text"
1143                 PutLong(himage + 56,  tbase                ); // TEXT START
1144                 PutLong(himage + 60,  tbase                ); // TEXT START
1145                 PutLong(himage + 64,  header->tsize        ); // TEXT size in bytes
1146                 PutLong(himage + 68,  tsoff                ); // Offset to section data in file
1147                 PutLong(himage + 72,  0x00000000           ); // Offset to section reloc in file (0L)
1148                 PutLong(himage + 76,  0x00000000           ); // Offset to debug lines structures (0L)
1149                 PutLong(himage + 80,  0x00000000           ); // Nreloc/nlnno (0L)
1150                 PutLong(himage + 84,  0x00000020           ); // SEC_FLAGS: STYP_TEXT
1151
1152                 // Build the DATA SEC_HDR
1153                 PutLong(himage + 88,  0x2E646174           );
1154                 PutLong(himage + 92,  0x61000000           ); // ".data"
1155                 PutLong(himage + 96,  dbase                ); // DATA START
1156                 PutLong(himage + 100, dbase                ); // DATA START
1157                 PutLong(himage + 104, header->dsize        ); // DATA size in bytes
1158                 PutLong(himage + 108, dsoff                ); // Offset to section data in file
1159                 PutLong(himage + 112, 0x00000000           ); // Offset to section reloc in file (0L)
1160                 PutLong(himage + 116, 0x00000000           ); // Offset to debugging lines structures (0L)
1161                 PutLong(himage + 120, 0x00000000           ); // Nreloc/nlnno (0L)
1162                 PutLong(himage + 124, 0x00000040           ); // SEC_FLAGS: STYP_DATA
1163
1164                 // Build the BSS SEC_HDR
1165                 PutLong(himage + 128, 0x2E627373           );
1166                 PutLong(himage + 132, 0x00000000           ); // ".bss"
1167                 PutLong(himage + 136, bbase                ); // BSS START
1168                 PutLong(himage + 140, bbase                ); // BSS START
1169                 PutLong(himage + 144, header->bsize        ); // BSS size in bytes
1170                 PutLong(himage + 148, bsoff                ); // Offset to section data in file
1171                 PutLong(himage + 152, 0x00000000           ); // Offset to section reloc in file (0L)
1172                 PutLong(himage + 156, 0x00000000           ); // Offset to debugging lines structures (0L)
1173                 PutLong(himage + 160, 0x00000000           ); // Nreloc/nlnno (0L)
1174                 PutLong(himage + 164, 0x00000080           ); // SEC_FLAGS: STYP_BSS
1175
1176                 symoffset = 168;                              // Update symbol offset
1177         }
1178         // Absolute (ABS) header
1179         else
1180         {
1181                 // Build the ABS header
1182                 PutWord(himage + 0,   0x601B               ); // Magic Number (0x601B)
1183                 PutLong(himage + 2,   header->tsize        ); // TEXT segment size
1184                 PutLong(himage + 6,   header->dsize        ); // DATA segment size
1185                 PutLong(himage + 10,  header->bsize        ); // BSS segment size
1186                 PutLong(himage + 14,  ost_index * 14       ); // Symbol table size (?)
1187                 PutLong(himage + 18,  0x00000000           ); //
1188                 PutLong(himage + 22,  tbase                ); // TEXT base address
1189                 PutWord(himage + 26,  0xFFFF               ); // Flags (?)
1190                 PutLong(himage + 28,  dbase                ); // DATA base address
1191                 PutLong(himage + 32,  bbase                ); // BSS base address
1192
1193                 symoffset = 36;                               // Update symbol offset
1194         }
1195
1196         // Write the header, but not if noheaderflag
1197         if (!noheaderflag)
1198         {
1199                 // Absolute (ABS) header
1200                 if (!cflag)
1201                 {
1202                         if (fwrite(himage, 36, 1, fd) != 1)
1203                                 goto werror;
1204                 }
1205                 // Absolute (COF) header
1206                 else
1207                 {
1208                         if (fwrite(himage, 168, 1, fd) != 1)
1209                                 goto werror;
1210                 }
1211         }
1212
1213         // Write the TEXT segment of each object file
1214         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1215         {
1216                 osize = otemp->o_header.tsize;
1217
1218                 // Write only if segment has size
1219                 if (osize)
1220                 {
1221                         if (vflag > 1)
1222                                 printf("Writing TEXT Segment of %s\n", otemp->o_name);
1223
1224                         if (fwrite(otemp->o_image + 32, osize, 1, fd) != 1)
1225                                 goto werror;
1226
1227                         // Pad to required alignment boundary
1228                         if (PadSegment(fd, osize, 0x0000))
1229                                 goto werror;
1230
1231                         symoffset += osize;
1232                 }
1233         }
1234
1235         // Write the DATA segment of each object file
1236         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1237         {
1238                 osize = otemp->o_header.dsize;
1239
1240                 // Write only if the segment has size
1241                 if (osize)
1242                 {
1243                         if (vflag > 1)
1244                                 printf("Writing DATA Segment of %s\n", otemp->o_name);
1245
1246                         if (fwrite((otemp->o_image + 32 + otemp->o_header.tsize), osize, 1, fd) != 1)
1247                                 goto werror;
1248
1249                         // Pad to required alignment boundary
1250                         if (PadSegment(fd, osize, 0))
1251                                 goto werror;
1252
1253                         symoffset += osize;
1254                 }
1255         }
1256
1257 //wha?  if (!noheaderflag)
1258         // This isn't quite right, but it's closer...
1259         // (the l and s flags tell the linker to output local & global symbols
1260         //  in the symbol table, so it seems there's some other thing that's a
1261         // default set somewhere. Not 100% sure. Setting -s kills -l, BTW...)
1262         if (lflag || sflag)
1263         {
1264                 // Write the symbols table and string table
1265                 // Absolute (COF) symbol/string table
1266                 if (cflag)
1267                 {
1268                         if (header->ssize)
1269                         {
1270                                 if (fwrite(ost, (ost_ptr - ost), 1, fd) != 1)
1271                                         goto werror;
1272
1273                                 if (fwrite(oststr, (oststr_ptr - oststr), 1, fd) != 1)
1274                                         goto werror;
1275                         }
1276                 }
1277                 // Absolute (ABS) symbol/string table
1278                 else
1279                 {
1280                         // The symbol and string table have been created as part of the
1281                         // DoSymbols() function and the output symbol and string tables are
1282                         // in COF format. For an ABS file we need to process through this
1283                         // to create the 14 character long combined symbol and string
1284                         // table. Format of symbol table in ABS: AAAAAAAATTVVVV, where
1285                         // (A)=STRING, (T)=TYPE & (V)=VALUE
1286
1287                         for(i=0; i<ost_index; i++)
1288                         {
1289                                 memset(symbol, 0, 14);          // Initialise symbol record
1290                                 abstype = 0;                            // Initialise ABS symbol type
1291                                 slen = 0;                                       // Initialise symbol string length
1292                                 index = GetLong(ost + (i * 12));        // Get symbol index
1293                                 type  = GetLong((ost + (i * 12)) + 4);  // Get symbol type
1294
1295                                 // Skip debug symbols
1296                                 if (type & 0xF0000000)
1297                                         continue;
1298
1299                                 // Get symbol value
1300                                 value = GetLong((ost + (i * 12)) + 8);
1301                                 slen = strlen(oststr + index);
1302
1303                                 // Get symbol string (maximum 8 chars)
1304                                 if (slen > 8)
1305                                 {
1306                                         for(j=0; j<8; j++)
1307                                                 *(symbol + j) = *(oststr + index + j);
1308                                 }
1309                                 else
1310                                 {
1311                                         for(j=0; j<slen; j++)
1312                                                 *(symbol + j) = *(oststr + index + j);
1313                                 }
1314
1315                                 // Modify to ABS symbol type
1316                                 switch (type)
1317                                 {
1318                                 case 0x02000000: abstype = (short)ABST_DEFINED;                           break;
1319                                 case 0x04000000: abstype = (short)ABST_DEFINED | ABST_TEXT;               break;
1320                                 case 0x05000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_TEXT; break;
1321                                 case 0x06000000: abstype = (short)ABST_DEFINED | ABST_DATA;               break;
1322                                 case 0x07000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_DATA; break;
1323                                 case 0x08000000: abstype = (short)ABST_DEFINED | ABST_BSS;                break;
1324                                 case 0x09000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_BSS;  break;
1325                                 default:
1326                                         printf("warning (WriteOutputFile): ABS, cannot determine symbol type ($%08X) [%s]\n", type, symbol);
1327 //                                      type = 0;
1328                                         break;
1329                                 }
1330
1331                                 PutWord(symbol + 8, abstype);   // Write back new ABS type
1332                                 PutLong(symbol + 10, value);    // Write back value
1333
1334                                 // Write symbol record
1335                                 if (fwrite(symbol, 14, 1, fd) != 1)
1336                                         goto werror;
1337                         }
1338                 }
1339         }
1340
1341         if (fclose(fd))
1342         {
1343                 printf("Close error on output file %s\n", ofile);
1344                 return 1;
1345         }
1346
1347         return 0;
1348
1349 werror:
1350         printf("Write error on output file %s\n", ofile);
1351         fclose(fd);                     // Try to close output file anyway
1352         return 1;
1353 }
1354
1355
1356 //
1357 // Display the symbol load map
1358 //
1359 int ShowSymbolLoadMap(struct OHEADER * header)
1360 {
1361         unsigned i, o;                  // Inner and outer loop iterators
1362         unsigned c;                             // Column number
1363         unsigned index;                 // Symbol string index
1364         unsigned type;                  // Symbol type
1365         unsigned value;                 // Symbol value
1366         char * symbol;                  // Symbol string value
1367
1368         if (ost_index == 0)
1369                 return 0;                       // Return if no symbols to map
1370
1371         printf("LOAD MAP\n\n");
1372
1373         // Outer loop for each of the symbol areas to map out;
1374         // 0 = NON-RELOCATABLE SYMBOLS
1375         // 1 = TEXT-SEGMENT RELOCATABLE SYMBOLS
1376         // 2 = DATA-SEGMENT RELOCATABLE SYMBOLS
1377         // 3 = BSS-SEGMENT RELOCATABLE SYMBOLS
1378         for(o=0; o<4; o++)
1379         {
1380                 // Display the correct map header for the symbols being processed
1381                 switch (o)
1382                 {
1383                 case 0: printf("NON-RELOCATABLE SYMBOLS\n\n");          break;
1384                 case 1: printf("TEXT-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1385                 case 2: printf("DATA-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1386                 case 3: printf("BSS-SEGMENT RELOCATABLE SYMBOLS\n\n");  break;
1387                 }
1388
1389                 c = 0;                          // Initialise column number
1390
1391                 // Inner loop to process each record in the symbol table
1392                 for(i=0; i<(unsigned)ost_index; i++)
1393                 {
1394                         index  = GetLong(ost + (i * 12));               // Get symbol string index
1395                         type   = GetLong(ost + (i * 12) + 4);   // Get symbol type
1396                         value  = GetLong(ost + (i * 12) + 8);   // Get symbol value
1397                         symbol = oststr + index;                                // Get symbol string
1398
1399                         // Display only three columns
1400                         if (c == 3)
1401                         {
1402                                 printf("\n");
1403                                 c = 0;
1404                         }
1405
1406                         // If local symbols not included and the type is local then go to
1407                         // next symbol record
1408                         if (!lflag & !(type & 0x01000000))
1409                                 continue;
1410
1411                         // Output each symbol to the display, dependant on type
1412                         switch (o)
1413                         {
1414                         case 0:
1415                                 // Non-relocatable symbols
1416                                 if (type == 0x02000000 || type == 0x03000000)
1417                                 {
1418                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1419                                         c++;
1420                                 }
1421
1422                                 break;
1423                         case 1:
1424                                 // TEXT segment relocatable symbols
1425                                 if (type == 0x04000000 || type == 0x05000000)
1426                                 {
1427                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1428                                         c++;
1429                                 }
1430
1431                                 break;
1432                         case 2:
1433                                 // DATA segment relocatble symbols
1434                                 if (type == 0x06000000 || type == 0x07000000)
1435                                 {
1436                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1437                                         c++;
1438                                 }
1439
1440                                 break;
1441                         case 3:
1442                                 // BSS segment relocatable symbols
1443                                 if (type == 0x08000000 || type == 0x09000000)
1444                                 {
1445                                         printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1446                                         c++;
1447                                 }
1448
1449                                 break;
1450                         }
1451                 }
1452
1453                 printf("\n\n");
1454         }
1455
1456         return 0;
1457 }
1458
1459
1460 //
1461 // Stuff the (long) value of a string into the value argument. RETURNS TRUE if
1462 // the string doesn't parse.  Parses only as a hexadecimal string.
1463 //
1464 int GetHexValue(char * string, int * value)
1465 {
1466         *value = 0;
1467
1468         while (isxdigit(*string))
1469         {
1470                 if (isdigit(*string))
1471                 {
1472                         *value = (*value << 4) + (*string++ - '0');
1473                 }
1474                 else
1475                 {
1476                         if (isupper(*string))
1477                                 *string = tolower(*string);
1478
1479                         *value = (*value << 4) + ((*string++ - 'a') + 10);
1480                 }
1481         }
1482
1483         if (*string != '\0')
1484         {
1485                 printf("Invalid hexadecimal value");
1486                 return 1;
1487         }
1488
1489         return 0;
1490 }
1491
1492
1493 //
1494 // Create one big .o file from the images already in memory, returning a
1495 // pointer to an OHEADER. Note that the oheader is just the header for the
1496 // output (plus some other information). The text, data, and fixups are all
1497 // still in the ofile images hanging off the global 'olist'.
1498 //
1499 struct OHEADER * MakeOutputObject()
1500 {
1501         unsigned tptr, dptr, bptr;      // Bases in runtime model
1502         int ret = 0;                            // Return value
1503         struct OHEADER * header;        // Output header pointer
1504
1505         // Initialize cumulative segment sizes
1506         textsize = datasize = bsssize = 0;
1507
1508         // For each object file, accumulate the sizes of the segments but remove
1509         // those object files which are unused
1510         struct OFILE * oprev = NULL;    // Init previous obj file list ptr
1511         struct OFILE * otemp = olist;   // Set temp pointer to object file list
1512
1513         while (otemp != NULL)
1514         {
1515                 // If the object is unused, discard it...
1516                 if ((otemp->o_flags & O_USED) == 0)
1517                 {
1518                         if (wflag)
1519                         {
1520                                 printf("Unused object file ");
1521                                 WriteARName(otemp);
1522                                 printf(" discarded.\n");
1523                         }
1524
1525                         // Drop the entry from the linked list
1526                         if (oprev == NULL)
1527                                 olist = otemp->o_next;
1528                         else
1529                                 oprev->o_next = otemp->o_next;
1530
1531                         // Free the object entry if it's not an archive file
1532                         if (!otemp->isArchiveFile)
1533                                 free(otemp->o_image);
1534                 }
1535                 else
1536                 {
1537                         // Save accumulated addresses in the object
1538                         otemp->segBase[TEXT] = textsize;
1539                         otemp->segBase[DATA] = datasize;
1540                         otemp->segBase[BSS]  = bsssize;
1541
1542                         // Increment total of segment sizes ensuring requested alignment
1543                         textsize += (otemp->o_header.tsize + secalign) & ~secalign;
1544                         datasize += (otemp->o_header.dsize + secalign) & ~secalign;
1545                         bsssize  += (otemp->o_header.bsize + secalign) & ~secalign;
1546                         oprev = otemp;
1547                 }
1548
1549                 // Go to next object file list pointer
1550                 otemp = otemp->o_next;
1551         }
1552
1553         // Update base addresses and inject the symbols _TEXT_E, _DATA_E and _BSS_E
1554         // into the OST
1555         tbase = tval;
1556
1557         if (!dval)
1558         {
1559                 // DATA follows TEXT
1560                 dbase = tval + textsize;
1561
1562                 if (!bval)
1563                         // BSS follows DATA
1564                         bbase = tval + textsize + datasize;
1565                 else
1566                         // BSS is independent of DATA
1567                         bbase = bval;
1568         }
1569         else
1570         {
1571                 // DATA is independent of TEXT
1572                 dbase = dval;
1573
1574                 if (!bval)
1575                         // BSS follows DATA
1576                         bbase = dval + datasize;
1577                 else
1578                         // BSS is independent of DATA
1579                         bbase = bval;
1580         }
1581
1582         // Inject segment end labels, for C compilers that expect this shite
1583         OSTAdd("_TEXT_E", 0x05000000, tbase + textsize);
1584         OSTAdd("_DATA_E", 0x07000000, dbase + datasize);
1585         OSTAdd("_BSS_E",  0x09000000, bbase + bsssize);
1586
1587         // Place each unresolved symbol in the output symbol table
1588         // N.B.: It only gets here to do this if user passes in -u flag
1589         //       [Only used here, once]
1590         if (DoUnresolved())
1591                 return NULL;
1592
1593         // Initialise base addresses
1594         tptr = dptr = bptr = 0;
1595
1596         // For each file, relocate its symbols and add them to the output symbol
1597         // table
1598         otemp = olist;
1599         oprev = NULL;
1600
1601         while (otemp != NULL)
1602         {
1603                 otemp->o_tbase = tptr;
1604                 otemp->o_dbase = dptr;
1605                 otemp->o_bbase = bptr;
1606                 tptr += (otemp->o_header.tsize + secalign) & ~secalign;
1607                 dptr += (otemp->o_header.dsize + secalign) & ~secalign;
1608                 bptr += (otemp->o_header.bsize + secalign) & ~secalign;
1609
1610                 // For each symbol, (conditionally) add it to the ost
1611                 // For ARCHIVE markers, this adds the symbol for the file & returns
1612                 // (Shamus: N.B. it does no such thing ATM)
1613                 // [Only used here, once]
1614                 if (DoSymbols(otemp))
1615                         return NULL;
1616
1617                 oprev = otemp;
1618                 otemp = otemp->o_next;
1619         }
1620
1621         // Places all the externs, globals etc into the output symbol table
1622         if (DoCommon() == -1)
1623                 return NULL;
1624
1625         // Create a new output file header
1626         header = new_oheader();
1627
1628         if (header == NULL)
1629         {
1630                 printf("MakeOutputObject: out of memory!\n");
1631                 return NULL;
1632         }
1633
1634         // Fill in the output header. Does not match the actual output but values
1635         // used as reference
1636         header->magic = 0x0150;                         // COF magic number
1637         header->tsize = textsize;                       // TEXT segment size
1638         header->dsize = datasize;                       // DATA segment size
1639         header->bsize = bsssize;                        // BSS segment size
1640         header->ssize = (ost_ptr - ost);        // Symbol table size
1641         header->ostbase = ost;                          // Output symbol table base address
1642
1643         // For each object file, relocate its TEXT and DATA segments. OR the result
1644         // into ret so all files get moved (and errors reported) before returning
1645         // with the error condition
1646         for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1647         {
1648                 ret |= RelocateSegment(otemp, T_TEXT); // TEXT segment relocations
1649                 ret |= RelocateSegment(otemp, T_DATA); // DATA segment relocations
1650         }
1651
1652         // Done with global symbol hash tables
1653         FreeHashes();
1654
1655         return (ret ? (struct OHEADER *)NULL : header);
1656 }
1657
1658
1659 //
1660 // Add symbol to hash list
1661 //
1662 int AddSymbolToHashList(struct HREC ** hptr, char * sym, struct OFILE * ofile,
1663         long value, int type)
1664 {
1665         struct HREC * htemp = new_hrec();
1666
1667         if (htemp == NULL)
1668         {
1669                 printf("Out of memory\n");
1670                 return 1;
1671         }
1672
1673         // Shamus: Moar testing...
1674         if (vflag > 1)
1675         {
1676                 printf("AddSymbolToHashList(): hptr=$%08X, sym=\"%s\", ofile=$%08X, value=$%X, type=$%X\n", hptr, sym, ofile, value, type);
1677         }
1678
1679         // Populate hash record
1680         memset(htemp->h_sym, 0, SYMLEN);
1681         strcpy(htemp->h_sym, sym);
1682         htemp->h_ofile = ofile;
1683         htemp->h_value = value;
1684         htemp->h_type = type;
1685
1686         // Add new hash to the front of the list (hence the ** for hptr)
1687         htemp->h_next = *hptr;
1688         *hptr = htemp;
1689
1690         return 0;
1691 }
1692
1693
1694 //
1695 // Add symbol to the unresolved symbols hash table (really, it's a linked list)
1696 //
1697 int AddUnresolvedSymbol(char * sym, struct OFILE * ofile)
1698 {
1699         if (vflag > 1)
1700                 printf("AddUnresolvedSymbol(%s, %s)\n", sym, ofile->o_name);
1701
1702         return AddSymbolToHashList(&unresolved, sym, ofile, 0L, 0);
1703 }
1704
1705
1706 //
1707 // Remove the HREC from the unresolved symbol list, and pass back a pointer
1708 // to the spot where the HREC was.
1709 //
1710 struct HREC * RemoveUnresolvedSymbol(struct HREC * hrec)
1711 {
1712         struct HREC * ptr = unresolved;
1713         struct HREC * previous = NULL;
1714
1715         while ((ptr != hrec) && (ptr != NULL))
1716         {
1717                 previous = ptr;
1718                 ptr = ptr->h_next;
1719         }
1720
1721         // Not found...!
1722         if (ptr == NULL)
1723                 return NULL;
1724
1725         struct HREC * next = ptr->h_next;
1726
1727         // Remove the head if nothing previous, otherwise, remove what we found
1728         if (previous == NULL)
1729                 unresolved = next;
1730         else
1731                 previous->h_next = next;
1732
1733         free(ptr);
1734         return next;
1735 }
1736
1737
1738 //
1739 // Add symbol to the unresolved symbols hash table
1740 //
1741 int AddARSymbol(char * sym, struct OFILE * ofile)
1742 {
1743         if (vflag > 1)
1744                 printf("AddARSymbol(%s, %s)\n", sym, ofile->o_name);
1745
1746         return AddSymbolToHashList(&arSymbol, sym, ofile, 0L, 0);
1747 }
1748
1749
1750 //
1751 // Generate hash value from the 1st 15 characters of the symbol modulo the
1752 // number of buckets in the hash.
1753 //
1754 int GetHash(char * s)
1755 {
1756         // For this to be consistent, the symbol MUST be zeroed out beforehand!
1757         // N.B.: strncpy() pads zeroes for us, if the symbol is less than 15 chars.
1758         char c[15];
1759         strncpy(c, s, 15);
1760
1761         int i = (c[0] + c[1] + c[2] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8]
1762                 + c[9] + c[10] + c[11] + c[12] + c[13] + c[14]) % NBUCKETS;
1763         return i;
1764 }
1765
1766
1767 //
1768 // Lookup a symbol in the hash table.
1769 // Returns either a pointer to the HREC or NULL if not found.
1770 //
1771 struct HREC * LookupHREC(char * symbol)
1772 {
1773         struct HREC * hptr = htable[GetHash(symbol)];
1774
1775         while (hptr != NULL)
1776         {
1777 //This is utter failure...
1778 //              if (symcmp(symbol, hptr->h_sym))  <-- left here for giggles :D  - LinkoVitch
1779                 // Return hash record pointer if found
1780                 if (strcmp(symbol, hptr->h_sym) == 0)
1781                         return hptr;
1782
1783                 hptr = hptr->h_next;
1784         }
1785
1786         return NULL;
1787 }
1788
1789
1790 //
1791 // Lookup a symbol in the AR symbol table.
1792 // Returns either a pointer to the HREC or NULL if not found.
1793 //
1794 struct HREC * LookupARHREC(char * symbol)
1795 {
1796         struct HREC * hptr = arSymbol;
1797
1798         while (hptr != NULL)
1799         {
1800                 // Return hash record pointer if found
1801                 if (strcmp(symbol, hptr->h_sym) == 0)
1802                         return hptr;
1803
1804                 hptr = hptr->h_next;
1805         }
1806
1807         return NULL;
1808 }
1809
1810
1811 //
1812 // Add the imported symbols from this file to unresolved, and the global and
1813 // common (???) symbols to the exported hash table.
1814 //
1815 // Change old-style commons (type == T_EXTERN, value != 0) to new-style ones
1816 // (type == (T_GLOBAL | T_EXTERN)). [??? O_o]
1817 // [N.B.: Whoever wrote the above didn't know what the fuck they were talking
1818 //        about. Commons (globals) are exactly what they are calling 'old
1819 //        style'. Also note, that there is no "T_GLOBAL" or "T_EXTERN" symbols
1820 //        defined anywhere in the code.]
1821 //
1822 int AddSymbols(struct OFILE * Ofile)
1823 {
1824         struct HREC * hptr;                     // Hash record pointer
1825
1826         if (vflag > 1)
1827         {
1828                 printf("AddSymbols: for file %s\n", Ofile->o_name);
1829                 printf("            t_bbase = $%X\n", Ofile->o_tbase);
1830                 printf("            d_bbase = $%X\n", Ofile->o_dbase);
1831                 printf("            o_bbase = $%X\n", Ofile->o_bbase);
1832                 printf("            tsize = $%X\n", Ofile->o_header.tsize);
1833                 printf("            dsize = $%X\n", Ofile->o_header.dsize);
1834                 printf("            bsize = $%X\n", Ofile->o_header.bsize);
1835                 printf("            reloc.tsize = $%X\n", Ofile->o_header.absrel.reloc.tsize);
1836                 printf("            reloc.dsize = $%X\n", Ofile->o_header.absrel.reloc.dsize);
1837         }
1838
1839         // Get base pointer, start of sym fixups
1840         char * ptr = Ofile->o_image + 32
1841                 + Ofile->o_header.tsize
1842                 + Ofile->o_header.dsize
1843                 + Ofile->o_header.absrel.reloc.tsize
1844                 + Ofile->o_header.absrel.reloc.dsize;
1845         char * sfix = ptr;                                                      // Set symbol fixup pointer
1846         char * sstr = sfix + Ofile->o_header.ssize;     // Set symbol table pointer
1847         long nsymbols = Ofile->o_header.ssize / 12;     // Obtain number of symbols
1848
1849         while (nsymbols)
1850         {
1851                 long index = GetLong(sfix);                             // Get symbol string index
1852                 long type  = GetLong(sfix + 4);                 // Get symbol type
1853                 long value = GetLong(sfix + 8);                 // Get symbol value
1854
1855                 if ((Ofile->isArchiveFile) && !(Ofile->o_flags & O_USED))
1856                 {
1857                         if ((type & T_GLBL) && (type & (T_SEG | T_ABS)))
1858                                 if (AddARSymbol(sstr + index, Ofile))
1859                                         return 1;
1860                 }
1861                 else if (type == T_GLBL)
1862                 {
1863                         // Global symbol that may or may not be in the current unit
1864                         hptr = LookupHREC(sstr + index);
1865
1866                         if (hptr != NULL)
1867                                 hptr->h_ofile->o_flags |= O_USED;       // Mark .o file as used
1868                         // Otherwise, *maybe* add to unresolved list
1869                         else
1870                         {
1871                                 // Check to see if this is a common symbol; if so, add it to
1872                                 // the hash list...
1873                                 if (value != 0)
1874                                 {
1875                                         // Actually, we need to convert this to a BSS symbol,
1876                                         // increase the size of the BSS segment for this object, &
1877                                         // add it to the hash list
1878                                         uint32_t bssLocation = Ofile->o_header.tsize + Ofile->o_header.dsize + Ofile->o_header.bsize;
1879                                         Ofile->o_header.bsize += value;
1880                                         Ofile->segSize[BSS] += value;
1881                                         type |= T_BSS;
1882                                         value = bssLocation;
1883                                         PutLong(sfix + 4, type);
1884                                         PutLong(sfix + 8, value);
1885
1886                                         if (vflag > 1)
1887                                                 printf("AddSymbols: Resetting common label to BSS label\n");
1888
1889                                         if (AddSymbolToHashList(&htable[GetHash(sstr + index)],
1890                                                 sstr + index, Ofile, value, type))
1891                                                 return 1;                               // Error if addition failed
1892                                 }
1893                                 // Make sure it's not a built-in external...
1894                                 else if ((strcmp(sstr + index, "_TEXT_E") != 0)
1895                                         && (strcmp(sstr + index, "_DATA_E") != 0)
1896                                         && (strcmp(sstr + index, "_BSS_E") != 0))
1897                                 {
1898                                         if (AddUnresolvedSymbol(sstr + index, Ofile))
1899                                                 return 1;                               // Error if addition failed
1900                                 }
1901                         }
1902                 }
1903                 else if ((type & T_GLBL) && (type & (T_SEG | T_ABS)))
1904                 {
1905                         hptr = LookupHREC(sstr + index);
1906
1907                         // Symbol isn't in the table, so try to add it:
1908                         if (hptr == NULL)
1909                         {
1910                                 if (AddSymbolToHashList(&htable[GetHash(sstr + index)],
1911                                         sstr + index, Ofile, value, type))
1912                                         return 1;
1913                         }
1914                         else
1915                         {
1916                                 // Symbol already exists, decide what to do about it
1917                                 // [N.B.: This isn't a check for a common symbol...
1918                                 //        BEWARE OF BAD INTERPRETATIONS!!]
1919                                 if (iscommon(hptr->h_type))
1920                                 {
1921                                         // Mismatch: common came first; warn and keep the global
1922                                         if (wflag)
1923                                         {
1924                                                 printf("Warning: %s: global from ", sstr + index);
1925                                                 WriteARName(Ofile);
1926                                                 printf(" used, common from ");
1927                                                 WriteARName(hptr->h_ofile);
1928                                                 printf(" discarded.\n");
1929                                         }
1930
1931                                         hptr->h_ofile = Ofile;
1932                                         hptr->h_type = type;
1933                                         hptr->h_value = value;
1934                                 }
1935                                 else
1936                                 {
1937                                         // Global exported by another ofile; warn and make this one
1938                                         // extern
1939                                         if (wflag)
1940                                         {
1941                                                 printf("Duplicate symbol %s: ", sstr + index);
1942                                                 WriteARName(hptr->h_ofile);
1943                                                 printf(" used, ");
1944                                                 WriteARName(Ofile);
1945                                                 printf(" discarded\n");
1946                                         }
1947
1948                                         // Set the global in this unit to pure external
1949                                         // (is this a good idea? what if the other one is a ref to
1950                                         // this one???)
1951                                         PutLong(sfix + 4, T_GLBL);
1952                                 }
1953                         }
1954                 }
1955
1956                 sfix += 12;                     // Increment symbol fixup pointer
1957                 nsymbols--;                     // Decrement num of symbols to process
1958         }
1959
1960         // Success loading symbols
1961         return 0;
1962 }
1963
1964
1965 //
1966 // Process object file for symbols
1967 //
1968 int DoItem(struct OFILE * obj)
1969 {
1970         // Allocate memory for object record ptr
1971         struct OFILE * Ofile = new_ofile();
1972
1973         if (Ofile == NULL)
1974         {
1975                 printf("Out of memory while processing %s\n", obj->o_name);
1976                 return 1;
1977         }
1978
1979         // Starting after all pathnames, etc., copy .o file name to Ofile
1980         char * temp = PathTail(obj->o_name);
1981
1982         // Check filename length
1983         if (strlen(temp) > FNLEN - 1)
1984         {
1985                 printf("File name too long: %s\n", temp);
1986                 return 1;
1987         }
1988
1989         // Check archive name length
1990         if (strlen(obj->o_arname) > (FNLEN - 1))
1991         {
1992                 printf("Archive name too long: %s\n", obj->o_arname);
1993                 return 1;
1994         }
1995
1996         strcpy(Ofile->o_name, temp);            // Store filename
1997         strcpy(Ofile->o_arname, obj->o_arname); // Store archive name
1998
1999         // Initialise object record information
2000         Ofile->o_next  = NULL;
2001         Ofile->o_tbase = 0;
2002         Ofile->o_dbase = 0;
2003         Ofile->o_bbase = 0;
2004         Ofile->o_flags = obj->o_flags;
2005         Ofile->o_image = obj->o_image;
2006         Ofile->isArchiveFile = obj->isArchiveFile;
2007         Ofile->segSize[TEXT] = obj->segSize[TEXT];
2008         Ofile->segSize[DATA] = obj->segSize[DATA];
2009         Ofile->segSize[BSS]  = obj->segSize[BSS];
2010         char * ptr = obj->o_image;
2011
2012         Ofile->o_header.magic = GetLong(ptr);
2013         Ofile->o_header.tsize = GetLong(ptr + 4);
2014         Ofile->o_header.dsize = GetLong(ptr + 8);
2015         Ofile->o_header.bsize = GetLong(ptr + 12);
2016         Ofile->o_header.ssize = GetLong(ptr + 16);
2017         Ofile->o_header.absrel.reloc.tsize = GetLong(ptr + 24);
2018         Ofile->o_header.absrel.reloc.dsize = GetLong(ptr + 28);
2019
2020         // Round BSS off to alignment boundary (??? isn't this already done ???)
2021         Ofile->o_header.bsize = (Ofile->o_header.bsize + secalign) & ~secalign;
2022
2023         if ((Ofile->o_header.dsize & 7) && wflag)
2024         {
2025                 printf("Warning: data segment size of ");
2026                 WriteARName(Ofile);
2027                 printf(" is not a phrase multiple\n");
2028         }
2029
2030         // Check for odd segment sizes
2031         if ((Ofile->o_header.tsize & 1) || (Ofile->o_header.dsize & 1)
2032                 || (Ofile->o_header.bsize & 1))
2033         {
2034                 printf("Error: odd-sized segment in ");
2035                 WriteARName(Ofile);
2036                 printf("; link aborted.\n");
2037                 return 1;
2038         }
2039
2040         if (AddSymbols(Ofile))
2041                 return 1;
2042
2043         // Add this file to the olist
2044         if (olist == NULL)
2045                 olist = Ofile;
2046         else
2047                 olast->o_next = Ofile;
2048
2049         olast = Ofile;
2050         return 0;
2051 }
2052
2053
2054 //
2055 // Handle items in processing list.
2056 //
2057 // After loading all objects, archives & include files, we now go and process
2058 // each item on the processing list (plist). Once this is done, we go through
2059 // any unresolved symbols left and see if they have shown up.
2060 //
2061 int ProcessLists(void)
2062 {
2063         // Process object file list first (adds symbols from each unit & creates
2064         // the olist)
2065         while (plist != NULL)
2066         {
2067                 if (DoItem(plist))
2068                         return 1;
2069
2070                 struct OFILE * ptemp = plist;
2071                 plist = plist->o_next;
2072                 free(ptemp);
2073         }
2074
2075         struct HREC * uptr;
2076
2077         // Process the unresolved symbols list. This may involve pulling in symbols
2078         // from any included .a units. Such units are lazy linked by default; we
2079         // generally don't want everything they provide, just what's referenced.
2080         for(uptr=unresolved; uptr!=NULL; )
2081         {
2082                 if (vflag > 1)
2083                         printf("LookupHREC(%s) => ", uptr->h_sym);
2084
2085                 struct HREC * htemp = LookupHREC(uptr->h_sym);
2086
2087                 if (htemp != NULL)
2088                 {
2089                         // Found it in the symbol table!
2090                         if (vflag > 1)
2091                                 printf("%s in %s (=$%06X)\n", (isglobal(htemp->h_type) ? "global" : "common"), htemp->h_ofile->o_name, htemp->h_value);
2092
2093                         // Mark the .o unit that the symbol is in as seen & remove from the
2094                         // unresolved list
2095                         htemp->h_ofile->o_flags |= O_USED;
2096                         uptr = RemoveUnresolvedSymbol(uptr);
2097                 }
2098                 else
2099                 {
2100                         if (vflag > 1)
2101                                 printf("NULL\n");
2102
2103                         // Check to see if the unresolved symbol is on the AR symbol list.
2104                         htemp = LookupARHREC(uptr->h_sym);
2105
2106                         // If the unresolved symbol is in a .o unit that is unused, we can
2107                         // drop it; same if the unresolved symbol is in the exported AR
2108                         // symbol list. Otherwise, go to the next unresolved symbol.
2109                         if (!(uptr->h_ofile->o_flags & O_USED) || (htemp != NULL))
2110                                 uptr = RemoveUnresolvedSymbol(uptr);
2111                         else
2112                                 uptr = uptr->h_next;
2113
2114                         // Now that we've possibly deleted the symbol from unresolved list
2115                         // that was also in the AR list, we add the symbols from this .o
2116                         // unit to the symbol table, mark the .o unit as used, and restart
2117                         // scanning the unresolved list as there is a good possibility that
2118                         // the symbols in the unit we're adding has unresolved symbols as
2119                         // well.
2120                         if (htemp != NULL)
2121                         {
2122                                 htemp->h_ofile->o_flags |= O_USED;
2123                                 AddSymbols(htemp->h_ofile);
2124                                 uptr = unresolved;
2125                         }
2126                 }
2127         }
2128
2129         // Show files used if the user requests it.
2130         if (vflag > 1)
2131         {
2132                 printf("Files used:\n");
2133                 struct OFILE * filePtr = olist;
2134
2135                 while (filePtr != NULL)
2136                 {
2137                         if (filePtr->o_flags & O_USED)
2138                         {
2139                                 printf("   %s%s%s\n", filePtr->o_name, (filePtr->isArchiveFile ? ":" : ""), (filePtr->isArchiveFile ? filePtr->o_arname : nullStr));
2140                         }
2141
2142                         filePtr = filePtr->o_next;
2143                 }
2144         }
2145
2146         return 0;
2147 }
2148
2149
2150 //
2151 // Extract filename from path
2152 //
2153 char * PathTail(char * name)
2154 {
2155         // Find last occurance of PATH_DELIMETER
2156         char * temp = strrchr(name, PATH_DELIMITER);
2157
2158         // Return what was passed in if path delimiter was not found
2159         if (temp == NULL)
2160                 return name;
2161
2162         return temp + 1;
2163 }
2164
2165
2166 //
2167 // Add input file to processing list
2168 //
2169 int AddToProcessingList(char * ptr, char * fname, char * arname, uint8_t arFile, uint32_t tSize, uint32_t dSize, uint32_t bSize)
2170 {
2171         if (plist == NULL)
2172         {
2173                 // First time object record allocation
2174                 plist = new_ofile();
2175                 plast = plist;
2176         }
2177         else
2178         {
2179                 // Next object record allocation
2180                 plast->o_next = new_ofile();
2181                 plast = plast->o_next;
2182         }
2183
2184         if (plast == NULL)
2185         {
2186                 printf("Out of memory.\n");             // Error if memory allocation fails
2187                 return 1;
2188         }
2189
2190         // Discard paths from filenames...
2191         fname = PathTail(fname);
2192         arname = PathTail(arname);
2193
2194         // Check for filename length errors...
2195         if (strlen(fname) > (FNLEN - 1))
2196         {
2197                 printf("File name too long: %s (sorry!)\n", fname);
2198                 return 1;
2199         }
2200
2201         if (strlen(arname) > (FNLEN - 1))
2202         {
2203                 printf("AR file name too long: %s (sorry!)\n", arname);
2204                 return 1;
2205         }
2206
2207         strcpy(plast->o_name, fname);           // Store filename sans path
2208         strcpy(plast->o_arname, arname);        // Store archive name sans path
2209         plast->o_image = ptr;                           // Store data pointer
2210         plast->o_flags = (arFile ? 0 : O_USED); // File is used if NOT in archive
2211         plast->o_next = NULL;                           // Initialise next record pointer
2212         plast->isArchiveFile = arFile;          // Shamus: Temp until can sort it out
2213         plast->segSize[TEXT] = tSize;
2214         plast->segSize[DATA] = dSize;
2215         plast->segSize[BSS]  = bSize;
2216
2217         return 0;                                                       // Return without errors
2218 }
2219
2220
2221 //
2222 // Process in binary include files and add them to the processing list. This
2223 // routine takes in the binary file and creates an 'object' file in memory.
2224 // Sym1/Sym2 point to the start and end of data.
2225 //
2226 // Image size for include files is:
2227 // Header ....... 32 bytes
2228 // Data ......... dsize
2229 // Sym fixups ... 2 * 12 bytes
2230 // Symbol size .. 4 bytes (Value to include symbols and terminating null)
2231 // Symbols ...... (strlen(sym1) + 1) + (strlen(sym2) + 1)
2232 // Terminate .... 4 bytes (0x00000000)
2233 //
2234 int LoadInclude(char * fname, int handle, char * sym1, char * sym2, int segment)
2235 {
2236         char * ptr, * sptr;
2237         int i;
2238         unsigned symtype = 0;
2239         uint32_t tSize = 0, dSize = 0, bSize = 0;
2240
2241         long fsize = FileSize(handle);          // Get size of include file
2242         long dsize = (fsize + secalign) & ~secalign;    // Align size to boundary
2243         int sym1len = strlen(sym1) + 1;         // Get sym1 length + null termination
2244         int sym2len = strlen(sym2) + 1;         // Get sym2 length + null termination
2245         long size = 32 + dsize + 24 + 4 + sym1len + sym2len + 4;
2246
2247         // Use calloc so the header & fixups initialize to zero
2248         // Allocate object image memory
2249         if ((ptr = calloc(size, 1)) == NULL)
2250         {
2251                 printf("Out of memory while including %s\n", fname);
2252                 close(handle);
2253                 return 1;
2254         }
2255
2256         // Read in binary data
2257         if (read(handle, ptr + 32, fsize) != fsize)
2258         {
2259                 printf("File read error on %s\n", fname);
2260                 close(handle);
2261                 free(ptr);
2262                 return 1;
2263         }
2264
2265         close(handle);
2266
2267         // Build this image's dummy header
2268         PutLong(ptr, 0x00000107);              // Magic number
2269
2270         if (segment)
2271         {
2272                 PutLong(ptr+4, dsize);             // Text size
2273                 PutLong(ptr+8, 0L);                // Data size
2274                 symtype = 0x05000000;
2275                 tSize = dsize;
2276         }
2277         else
2278         {
2279                 PutLong(ptr+4, 0L);                // Text size
2280                 PutLong(ptr+8, dsize);             // Data size
2281                 symtype = 0x07000000;
2282                 dSize = dsize;
2283         }
2284
2285         PutLong(ptr+12, 0L);                   // BSS size
2286         PutLong(ptr+16, 24);                   // Symbol table size
2287         PutLong(ptr+20, 0L);                   // Entry point
2288         PutLong(ptr+24, 0L);                   // TEXT relocation size
2289         PutLong(ptr+28, 0L);                   // DATA relocation size
2290
2291         sptr = ptr + 32 + dsize;               // Set sptr to symbol table location
2292
2293         PutLong(sptr,    4L);                  // String offset of symbol1
2294         PutLong(sptr+4,  symtype);             // Symbol type
2295         PutLong(sptr+8,  0x00000000);          // Symbol has no value (START)
2296         PutLong(sptr+12, 4L + (sym2len - 1));  // String offset of symbol2
2297         PutLong(sptr+16, symtype);             // Symbol type
2298         PutLong(sptr+20, dsize);               // Symbol is data size (END)
2299
2300         sptr = ptr + 32 + dsize + 24;          // Set sptr to symbol table size loc
2301
2302         PutLong(sptr, sym1len + 4L);           // Size of symbol table
2303
2304         sptr = ptr + 32 + dsize + 24 + 4;      // Set sptr to symbol table location
2305
2306         for(i=0; i<(sym1len-1); i++)           // Write symbol1 to string table
2307                 sptr[i] = *sym1++;
2308
2309         sptr += (sym1len - 1);                 // Step past symbol string
2310         *sptr = '\0';                          // Terminate symbol string
2311         sptr += 1;                             // Step past termination
2312
2313         for(i=0; i<(sym2len-1); i++)           // Write symbol2 to string table
2314                 sptr[i] = *sym2++;
2315
2316         sptr += (sym2len - 1);                 // Step past symbol string
2317         *sptr = '\0';                          // Terminate symbol string
2318         sptr += 1;                             // Step past termination
2319
2320         PutLong(sptr, 0L);                     // Terminating long for object file
2321
2322         return AddToProcessingList(ptr, fname, nullStr, 0, tSize, dSize, bSize);
2323 }
2324
2325
2326 //
2327 // Takes a file name, gets in its image, puts it on plist. The image may
2328 // already be in memory: If so, the ptr arg is non-null.  If so, the file is
2329 // already closed. Note that the file is already open (from DoFile()). RETURNS
2330 // a pointer to the OFILE structure for this file, so you can diddle its flags
2331 // (DoFile sets O_USED for files on the command line).
2332 //
2333 int LoadObject(char * fname, int fd, char * ptr)
2334 {
2335         uint32_t tSize = 0, dSize = 0, bSize = 0;
2336
2337         if (ptr == NULL)
2338         {
2339                 long size = FileSize(fd);
2340
2341                 // Allocate memory for file data
2342                 ptr = malloc(size);
2343
2344                 if (ptr == NULL)
2345                 {
2346                         printf("Out of memory while processing %s\n", fname);
2347                         close(fd);
2348                         return 1;
2349                 }
2350
2351                 // Read in file data
2352                 if (read(fd, ptr, size) != size)
2353                 {
2354                         printf("File read error on %s\n", fname);
2355                         close(fd);
2356                         free(ptr);
2357                         return 1;
2358                 }
2359
2360                 tSize = (GetLong(ptr + 4)  + secalign) & ~secalign;
2361                 dSize = (GetLong(ptr + 8)  + secalign) & ~secalign;
2362                 bSize = (GetLong(ptr + 12) + secalign) & ~secalign;
2363                 close(fd);
2364         }
2365
2366         // Now add this image to the list of pending ofiles (plist)
2367         return AddToProcessingList(ptr, fname, nullStr, 0, tSize, dSize, bSize);
2368 }
2369
2370
2371 //
2372 // What it says on the tin: check for a .o suffix on the passed in string
2373 //
2374 uint8_t HasDotOSuffix(char * s)
2375 {
2376         char * temp = strrchr(s, '.');
2377
2378         if ((temp == NULL) || (strncmp(temp, ".o", 2) != 0))
2379                 return 0;
2380
2381         return 1;
2382 }
2383
2384
2385 //
2386 // Process an ar archive file (*.a)
2387 //
2388 int LoadArchive(char * fname, int fd)
2389 {
2390         // Read in the archive file to memory and process
2391         long size = FileSize(fd);
2392         char * ptr = malloc(size);
2393         char * endPtr = ptr + size;
2394         char * longFilenames = NULL;
2395
2396         if (ptr == NULL)
2397         {
2398                 printf("Out of memory while processing %s\n", fname);
2399                 close(fd);
2400                 return 1;
2401         }
2402
2403         if (read(fd, ptr, size) != size)
2404         {
2405                 printf("File read error on %s\n", fname);
2406                 close(fd);
2407                 free(ptr);
2408                 return 1;
2409         }
2410
2411         close(fd);
2412
2413         // Save the pointer for later...
2414         arPtr[arIndex++] = ptr;
2415         char objName[FNLEN];
2416         char objSize[11];
2417         int i;
2418 //printf("\nProcessing AR file \"%s\"...\n", fname);
2419         ptr += 8;
2420
2421         // Loop through all objects in the archive and process them
2422         do
2423         {
2424                 memset(objName, 0, 17);
2425                 objSize[10] = 0;
2426
2427                 for(i=0; i<16; i++)
2428                 {
2429 //                      if ((ptr[i] == '/') || (ptr[i] == ' '))
2430                         if ((ptr[i] == ' ') && (i != 0))
2431                         {
2432                                 objName[i] = 0;
2433                                 break;
2434                         }
2435
2436                         objName[i] = ptr[i];
2437                 }
2438
2439                 for(i=0; i<10; i++)
2440                 {
2441                         if (ptr[48 + i] == ' ')
2442                         {
2443                                 objSize[i] = 0;
2444                                 break;
2445                         }
2446
2447                         objSize[i] = ptr[48 + i];
2448                 }
2449
2450                 // Check to see if a long filename was requested
2451                 // N.B.: " " is for GNU archives, and "/" is for BSD archives
2452                 if ((objName[0] == 0x20) || (objName[0] == '/'))
2453                 {
2454                         uint32_t fnSize = atoi(objName + 1);
2455
2456                         if (longFilenames != NULL)
2457                         {
2458                                 i = 0;
2459                                 char * currentFilename = longFilenames + fnSize;
2460
2461                                 while (*currentFilename != 0x0A)
2462                                         objName[i++] = *currentFilename++;
2463
2464                                 objName[i] = 0;
2465                         }
2466                 }
2467
2468                 if ((strncmp(objName, "ARFILENAMES/", 12) == 0) || (strncmp(objName, "//", 2) == 0))
2469                 {
2470                         longFilenames = ptr + 60;
2471                 }
2472                 else if (HasDotOSuffix(objName))
2473                 {
2474
2475                         // Strip off any trailing forward slash at end of object name
2476                         int lastChar = strlen(objName) - 1;
2477
2478                         if (objName[lastChar] == '/')
2479                                 objName[lastChar] = 0;
2480
2481 //printf("Processing object \"%s\" (size == %i, obj_index == %i)...\n", objName, atoi(objSize), obj_index);
2482                         uint32_t tSize = (GetLong(ptr + 60 + 4)  + secalign) & ~secalign;
2483                         uint32_t dSize = (GetLong(ptr + 60 + 8)  + secalign) & ~secalign;
2484                         uint32_t bSize = (GetLong(ptr + 60 + 12) + secalign) & ~secalign;
2485
2486                         if (AddToProcessingList(ptr + 60, objName, fname, 1, tSize, dSize, bSize))
2487                                 return 1;
2488                 }
2489
2490                 uint32_t size = atoi(objSize);
2491                 size += (size & 0x01 ? 1 : 0);
2492                 ptr += 60 + size;
2493         }
2494         while (ptr < endPtr);
2495
2496         return 0;
2497 }
2498
2499
2500 //
2501 // Process files (*.o, *.a) passed in on the command line
2502 //
2503 int ProcessFiles(void)
2504 {
2505         int i;
2506         char magic[8];          // Magic header number (4 bytes for *.o, 8 for *.a)
2507
2508         // Process all file handles
2509         for(i=0; i<(int)hd; i++)
2510         {
2511                 // Verbose mode information
2512                 if (vflag == 1)
2513                         printf("Read file %s%s\n", name[i], (hflag[i] ? " (include)" : ""));
2514
2515                 if (!hflag[i])
2516                 {
2517                         // Attempt to read file magic number (OBJECT/ARCHIVE FILES)
2518                         if (read(handle[i], magic, 8) != 8)
2519                         {
2520                                 printf("Error reading file %s\n", name[i]);
2521                                 close(handle[i]);
2522                                 return 1;
2523                         }
2524
2525                         lseek(handle[i], 0L, 0);        // Reset to start of input file
2526
2527                         // Look for RMAC/MAC/GCC (a.out) object files
2528                         if ((GetLong(magic) & 0xFFFF) == 0x0107)
2529                         {
2530                                 // Process input object file
2531                                 if (LoadObject(name[i], handle[i], 0L))
2532                                         return 1;
2533                         }
2534                         // Otherwise, look for an object archive file
2535                         else if (strncmp(magic, "!<arch>\x0A", 8) == 0)
2536                         {
2537                                 if (LoadArchive(name[i], handle[i]))
2538                                         return 1;
2539                         }
2540                         else
2541                         {
2542                                 // Close file and error
2543                                 printf("%s is not a supported object or archive file\n", name[i]);
2544                                 printf("Magic == [%02X][%02X][%02X][%02X]\n", magic[0], magic[1], magic[2], magic[3]);
2545                                 close(handle[i]);
2546                                 return 1;
2547                         }
2548                 }
2549                 else
2550                 {
2551                         // INCLUDE FILES
2552                         // If hflag[i] is 1, include this in the data segment; if 2, put it
2553                         // in text segment
2554                         if (LoadInclude(name[i], handle[i], hsym1[i], hsym2[i], hflag[i] - 1))
2555                                 return 1;
2556                 }
2557         }
2558
2559         // Free include, symbol & object handles
2560         for(i=0; i<(int)hd; i++)
2561         {
2562                 free(name[i]);
2563
2564                 if (hflag[i])
2565                 {
2566                         free(hsym1[i]);
2567                         free(hsym2[i]);
2568                 }
2569         }
2570
2571         // Reset next handle indicator
2572         hd = 0;
2573         return 0;
2574 }
2575
2576
2577 //
2578 // Load newargv with pointers to arguments found in the buffer
2579 //
2580 int parse(char * buf, char * newargv[])
2581 {
2582         int i = 1;
2583
2584         if (vflag)
2585                 printf("begin parsing\n");
2586
2587         while (1)
2588         {
2589                 while (*buf && strchr(",\t\n\r\14 ", *buf))
2590                         buf++;
2591
2592                 /* test for eof */
2593                 if (*buf == '\0' || *buf == 26)
2594                 {
2595                         if (i == 0)
2596                         {
2597                                 printf("No commands in command file\n");
2598                                 return -1;
2599                         }
2600                         else
2601                         {
2602                                 return i;
2603                         }
2604                 }
2605
2606                 /* test for comment */
2607                 if (*buf == '#')
2608                 {
2609                         /* found a comment; skip to next \n and start over */
2610                         while (*buf && *buf != '\n')
2611                                 buf++;
2612
2613                         continue;
2614                 }
2615
2616                 if (i == MAXARGS)
2617                 {
2618                         printf("Too many arguments in command file\n");
2619                         return -1;
2620                 }
2621
2622                 newargv[i] = buf;
2623
2624                 while (!strchr(",\t\n\r\14 ", *buf))
2625                 {
2626                         if (*buf == '\0' || *buf == 26)
2627                         {
2628                                 printf("Finished parsing %d args\n", i);
2629                                 return i;
2630                         }
2631
2632                         buf++;
2633                 }
2634
2635                 *buf++ = '\0';
2636
2637                 if (vflag)
2638                         printf("argv[%d] = \"%s\"\n", i, newargv[i]);
2639
2640                 i++;
2641         }
2642 }
2643
2644
2645 //
2646 // Process in a link command file
2647 //
2648 int docmdfile(char * fname)
2649 {
2650         int fd;                                     // File descriptor
2651         unsigned size;                              // Command file size
2652         char * ptr;                                 // Pointer
2653         int newargc;                                // New argument count
2654         char * (*newargv)[];                        // New argument value array
2655
2656         // Verbose information
2657         if (vflag > 1)
2658                 printf("docmdfile(%s)\n", fname);
2659
2660         // Allocate memory for new argument values
2661         newargv = malloc((long)(sizeof(char *) * MAXARGS));
2662
2663         if (!newargv)
2664         {
2665                 printf("Out of memory.\n");
2666                 return 1;
2667         }
2668
2669         // Attempt to open and read in the command file
2670         if (fname)
2671         {
2672                 if ((fd = open(fname, _OPEN_FLAGS)) < 0)
2673                 {
2674                         printf("Cannot open command file %s.\n", fname);
2675                         return 1;
2676                 }
2677
2678                 size = FileSize(fd);
2679
2680                 if ((ptr = malloc(size + 1)) == NULL)
2681                 {
2682                         printf("Out of memory.\n");
2683                         close(fd);
2684                         return 1;
2685                 }
2686
2687                 if (read(fd, ptr, size) != (int)size)
2688                 {
2689                         printf("Read error on command file %s.\n", fname);
2690                         close(fd);
2691                         return 1;
2692                 }
2693
2694                 *(ptr + size) = 0;                      // Null terminate the buffer
2695                 close(fd);
2696         }
2697         else
2698         {
2699                 printf("No command filename specified\n");
2700                 return 1;
2701         }
2702
2703         // Parse the command file
2704         if ((newargc = parse(ptr, *newargv)) == -1)
2705         {
2706                 return 1;
2707         }
2708
2709         // Process the inputted flags
2710         if (doargs(newargc, *newargv))
2711         {
2712                 printf("docmdfile: doargs returns TRUE\n");
2713                 return 1;
2714         }
2715
2716         free(ptr);
2717         free(newargv);
2718
2719         return 0;
2720 }
2721
2722
2723 //
2724 // Take an argument list and parse the command line
2725 //
2726 int doargs(int argc, char * argv[])
2727 {
2728         int i = 1;                                      // Iterator
2729         int c;                                          // Command line character
2730         char * ifile, * isym;           // File name and symbol name for -i
2731
2732         // Parse through option switches & files
2733         while (i < argc)
2734         {
2735                 // Process command line switches
2736                 if (argv[i][0] == '-')
2737                 {
2738                         if (!argv[i][1])
2739                         {
2740                                 printf("Illegal option argument: %s\n\n", argv[i]);
2741                                 ShowHelp();
2742                                 return 1;
2743                         }
2744
2745                         c = argv[i++][1];                       // Get next character in command line
2746
2747                         // Process command line switch
2748                         switch (c)
2749                         {
2750                         case '?':                                       // Display usage information
2751                         case 'h':
2752                         case 'H':
2753                                 ShowVersion();
2754                                 ShowHelp();
2755                                 return 1;
2756                         case 'a':
2757                         case 'A':                                       // Set absolute linking on
2758                                 if (aflag)
2759                                         warn('a', 1);
2760
2761                                 if (i + 2 >= argc)
2762                                 {
2763                                         printf("Not enough arguments to -a\n");
2764                                         return 1;
2765                                 }
2766
2767                                 aflag = 1;                              // Set abs link flag
2768
2769                                 // Segment order is TEXT, DATA, BSS
2770                                 // Text segment can be 'r' or a value
2771                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2772                                 {
2773                                         ttype = -1;                     // TEXT segment is relocatable
2774                                 }
2775                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2776                                 {
2777                                         printf("Error in text-segment address: cannot be contiguous\n");
2778                                         return 1;
2779                                 }
2780                                 else if (GetHexValue(argv[i], &tval))
2781                                 {
2782                                         printf("Error in text-segment address: %s is not 'r' or an address.", argv[i]);
2783                                         return 1;
2784                                 }
2785
2786                                 i++;
2787
2788                                 // Data segment can be 'r', 'x' or a value
2789                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2790                                 {
2791                                         dtype = -1;                     // DATA segment is relocatable
2792                                 }
2793                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2794                                 {
2795                                         dtype = -2;                     // DATA follows TEXT
2796                                 }
2797                                 else if (GetHexValue(argv[i], &dval))
2798                                 {
2799                                         printf("Error in data-segment address: %s is not 'r', 'x' or an address.", argv[i]);
2800                                         return 1;
2801                                 }
2802
2803                                 i++;
2804
2805                                 // BSS segment can be 'r', 'x' or a value
2806                                 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2807                                 {
2808                                         btype = -1;                     // BSS segment is relocatable
2809                                 }
2810                                 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2811                                 {
2812                                         btype = -3;                     // BSS follows DATA
2813                                 }
2814                                 else if (GetHexValue(argv[i], &bval))
2815                                 {
2816                                         printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
2817                                         return 1;
2818                                 }
2819
2820                                 i++;
2821                                 break;
2822                         case 'b':
2823                         case 'B':                                       // Don't remove muliply defined locals
2824                                 if (bflag)
2825                                         warn('b', 1);
2826
2827                                 bflag = 1;
2828                                 break;
2829                         case 'c':
2830                         case 'C':                                       // Process a command file
2831                                 if (i == argc)
2832                                 {
2833                                         printf("Not enough arguments to -c\n");
2834                                         return 1;
2835                                 }
2836
2837                                 if (docmdfile(argv[i++]))
2838                                 {
2839                                         return 1;
2840                                 }
2841
2842                                 break;
2843                         case 'd':
2844                         case 'D':                                       // Wait for "return" before exiting
2845                                 if (dflag)
2846                                         warn('d', 0);
2847
2848                                 dflag = 1;
2849                                 waitflag = 1;
2850                                 break;
2851                         case 'e':
2852                         case 'E':                                       // Output COFF (absolute only)
2853                                 cflag = 1;
2854                                 break;
2855                         case 'g':
2856                         case 'G':                                       // Output source level debugging
2857                                 printf("\'g\' flag not currently implemented\n");
2858                                 gflag = 0;
2859                                 /*
2860                                 if (gflag) warn('g', 1);
2861                                 gflag = 1;
2862                                 */
2863                                 break;
2864                         case 'i':
2865                         case 'I':                                       // Include binary file
2866                                 if (i + 2 > argc)
2867                                 {
2868                                         printf("Not enough arguments to -i\n");
2869                                         return 1;
2870                                 }
2871
2872                                 ifile = argv[i++];
2873                                 isym = argv[i++];
2874
2875                                 // handle -ii (No truncation)
2876                                 if ((argv[i-3][2] == 'i') || (argv[i-3][2] == 'I'))
2877                                 {
2878                                         if (!cflag)
2879                                                 printf("warning: (-ii) COFF format output not specified\n");
2880                                 }
2881                                 // handle -i (Truncation)
2882                                 else
2883                                 {
2884                                         if (strlen(isym) > 8)
2885                                                 isym[8] = '\0';
2886                                 }
2887
2888                                 // Place include files in the DATA segment only
2889                                 if (DoFile(ifile, DSTSEG_D, isym))
2890                                         return 1;
2891
2892                                 break;
2893                         case 'l':
2894                         case 'L':                                       // Add local symbols
2895                                 if (lflag)
2896                                         warn('l', 1);
2897
2898                                 lflag = 1;
2899                                 break;
2900                         case 'm':
2901                         case 'M':                                       // Produce load symbol map
2902                                 if (mflag)
2903                                         warn('m', 1);
2904
2905                                 mflag = 1;
2906                                 break;
2907                         case 'n':
2908                         case 'N':                                       // Output no header to .abs file
2909                                 if (noheaderflag)
2910                                         warn('n', 1);
2911
2912                                 noheaderflag = 1;
2913                                 break;
2914                         case 'o':
2915                         case 'O':                                       // Specify an output file
2916                                 if (oflag)
2917                                         warn('o', 1);
2918
2919                                 oflag = 1;
2920
2921                                 if (i >= argc)
2922                                 {
2923                                         printf("No output filename following -o switch\n");
2924                                         return 1;
2925                                 }
2926
2927                                 if (strlen(argv[i]) > FARGSIZE - 5)
2928                                 {
2929                                         printf("Output file name too long (sorry!)\n");
2930                                         return 1;
2931                                 }
2932
2933                                 strcpy(ofile, argv[i++]);
2934                                 break;
2935                         case 'r':
2936                         case 'R':                                       // Section alignment size
2937                                 if (rflag)
2938                                         warn('r', 1);
2939
2940                                 rflag = 1;
2941
2942                                 switch (argv[i-1][2])
2943                                 {
2944                                         case 'w': case 'W': secalign = 1;  break; // Word alignment
2945                                         case 'l': case 'L': secalign = 3;  break; // Long alignment
2946                                         case 'p': case 'P': secalign = 7;  break; // Phrase alignment
2947                                         case 'd': case 'D': secalign = 15; break; // Double phrase alignment
2948                                         case 'q': case 'Q': secalign = 31; break; // Quad phrase alignment
2949                                         default:            secalign = 7;  break; // Default phrase alignment
2950                                 }
2951
2952                                 break;
2953                         case 's':
2954                         case 'S':                                       // Output only global symbols
2955                                 if (sflag)
2956                                         warn('s', 1);
2957
2958                                 sflag = 1;
2959                                 break;
2960                         case 'u':
2961                         case 'U':                                       // Undefined symbols
2962                                 uflag++;
2963                                 break;
2964                         case 'v':
2965                         case 'V':                                       // Verbose information
2966                                 if (!vflag && !versflag)
2967                                 {
2968                                         ShowVersion();
2969                                 }
2970
2971                                 vflag++;
2972                                 break;
2973                         case 'w':
2974                         case 'W':                                       // Show warnings flag
2975                                 if (wflag)
2976                                         warn('w', 1);
2977
2978                                 wflag = 1;
2979                                 break;
2980                         case 'z':
2981                         case 'Z':                                       // Suppress banner flag
2982                                 if (zflag)
2983                                         warn('z', 1);
2984
2985                                 zflag = 1;
2986                                 break;
2987                         default:
2988                                 printf("unknown option argument `%c'\n", c);
2989                                 return 1;
2990                         }
2991                 }
2992                 else
2993                 {
2994                         // Not a switch, then process as a file
2995                         if (DoFile(argv[i++], 0, NULL))
2996                                 return 1;
2997                 }
2998         }
2999
3000         if (!oflag && vflag)
3001         {
3002                 strcpy(ofile, "output");
3003                 printf("Output file is %s[.ext]\n", ofile);
3004         }
3005
3006         if (oflag && vflag)
3007                 printf("Output file is %s\n", ofile);
3008
3009         if (sflag)
3010                 lflag = 0;
3011
3012         // No problems encountered
3013         return 0;
3014 }
3015
3016
3017 //
3018 // Display version information
3019 //
3020 void ShowVersion(void)
3021 {
3022         if (displaybanner)// && vflag)
3023         {
3024                 printf(
3025                 "      _\n"
3026                 " _ __| |_ ___\n"
3027                 "| '__| | '_  \\\n"
3028                 "| |  | | | | |\n"
3029                 "|_|  |_|_| |_|\n"
3030                 "\nReboot's Linker for Atari Jaguar\n"
3031                 "Copyright (c) 199x Allan K. Pratt, 2014-2018 Reboot\n"
3032                 "V%i.%i.%i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
3033         }
3034 }
3035
3036
3037 //
3038 // Display command line help
3039 //
3040 void ShowHelp(void)
3041 {
3042         printf("Usage:\n");
3043         printf("    %s [-options] file(s)\n", cmdlnexec);
3044         printf("\n");
3045         printf("Options:\n");
3046         printf("   -? or -h                display usage information\n");
3047         printf("   -a <text> <data> <bss>  output absolute file\n");
3048         printf("                           hex value: segment address\n");
3049         printf("                           r: relocatable segment\n");
3050         printf("                           x: contiguous segment\n");
3051         printf("   -b                      don't remove multiply defined local labels\n");
3052         printf("   -c <fname>              add contents of <fname> to command line\n");
3053         printf("   -d                      wait for key after link\n");
3054         printf("   -e                      output COF absolute file\n");
3055         printf("   -g                      output source-level debugging\n");
3056         printf("   -i <fname> <label>      incbin <fname> and set <label> (trunc to 8 chars)\n");
3057         printf("   -ii <fname> <label>     incbin <fname> and set <label> (no truncation)\n");
3058         printf("   -l                      add local symbols\n");
3059         printf("   -m                      produce load symbols map\n");
3060         printf("   -n                      output no file header to absolute file\n");
3061         printf("   -o <fname>              set output name\n");
3062         printf("   -r<size>                section alignment size\n");
3063         printf("                           w: word (2 bytes)\n");
3064         printf("                           l: long (4 bytes)\n");
3065         printf("                           p: phrase (8 bytes, default alignment)\n");
3066         printf("                           d: double phrase (16 bytes)\n");
3067         printf("                           q: quad phrase (32 bytes)\n");
3068         printf("   -s                      output only global symbols (supresses -l)\n");
3069         printf("   -u                      allow unresolved symbols (experimental)\n");
3070         printf("   -v                      set verbose mode\n");
3071         printf("   -w                      show linker warnings\n");
3072         printf("   -z                      suppress banner\n");
3073         printf("\n");
3074 }
3075
3076
3077 //
3078 // Application exit
3079 //
3080 void ExitLinker(void)
3081 {
3082         char tempbuf[128];
3083
3084         // Display link status if verbose mode
3085         if (vflag)
3086                 printf("Link %s.\n", errflag ? "aborted" : "complete");
3087
3088         // Wait for return key if requested
3089         if (waitflag)
3090         {
3091                 printf("\nPress the [RETURN] key to continue. ");
3092                 char * c = fgets(tempbuf, 128, stdin);
3093         }
3094
3095         exit(errflag);
3096 }
3097
3098
3099 int main(int argc, char * argv[])
3100 {
3101         cmdlnexec = argv[0];                    // Obtain executable name
3102         char * s = getenv("RLNPATH");   // Attempt to obtain env variable
3103
3104         if (s)
3105                 strcpy(libdir, s);                      // Store it if found
3106
3107         // Initialize some vars
3108         tval = dval = bval = 0;
3109         ttype = dtype = btype = 0;
3110
3111         // Parse the command line
3112         if (doargs(argc, argv))
3113         {
3114                 errflag = 1;
3115                 ExitLinker();
3116         }
3117
3118         if (!zflag && !vflag)
3119         {
3120                 ShowVersion();                          // Display version information
3121                 versflag = 1;                           // We've dumped the version banner
3122         }
3123
3124         // Load in specified files/objects and add to processing list
3125         if (ProcessFiles())
3126         {
3127                 errflag = 1;
3128                 ExitLinker();
3129         }
3130
3131         // Work in items in processing list & deal with unresolved list
3132         if (ProcessLists())
3133         {
3134                 errflag = 1;
3135                 ExitLinker();
3136         }
3137
3138         // Check that there is something to link
3139         if (olist == NULL)
3140         {
3141                 ShowHelp();
3142                 ExitLinker();
3143         }
3144
3145         // Report unresolved externals
3146         if (unresolved != NULL)
3147         {
3148                 printf("UNRESOLVED SYMBOLS\n");
3149
3150                 // Don't list them if two -u's or more
3151                 if (uflag < 2)
3152                 {
3153                         struct HREC * utemp = unresolved;
3154
3155                         while (utemp != NULL)
3156                         {
3157                                 printf("\t%s (", utemp->h_sym);
3158                                 WriteARName(utemp->h_ofile);
3159                                 printf(")\n");
3160                                 utemp = utemp->h_next;
3161                         }
3162                 }
3163
3164                 if (!uflag)
3165                 {
3166                         errflag = 1;
3167                         ExitLinker();
3168                 }
3169         }
3170
3171         // Make one output object from input objects
3172         struct OHEADER * header = MakeOutputObject();
3173
3174         if (header == NULL)
3175         {
3176                 errflag = 1;
3177                 ExitLinker();
3178         }
3179
3180         // Partial linking
3181         if (pflag)
3182         {
3183                 printf("TO DO: Partial linking\n");
3184                 errflag = 1;
3185         }
3186         // Relocatable linking
3187         else if (!aflag)
3188         {
3189                 printf("TO DO: Relocatable linking\n");
3190                 errflag = 1;
3191         }
3192         // Absolute linking
3193         else
3194         {
3195                 if (vflag)
3196                         printf("Absolute linking (%s)\n", (cflag ? "COF" : "ABS"));
3197
3198                 if (vflag > 1)
3199                         printf("Header magic is 0x%04X\n", (unsigned int)header->magic);
3200
3201                 if (WriteOutputFile(header))
3202                         errflag = 1;
3203         }
3204
3205         // Display the loaded symbols map
3206         if (mflag)
3207                 if (ShowSymbolLoadMap(header))
3208                         errflag = 1;
3209
3210         // Display segment size summary
3211         if (vflag)
3212         {
3213                 printf("\n");
3214                 printf("+---------+----------+----------+----------+\n");
3215                 printf("| Segment |     TEXT |     DATA |      BSS |\n");
3216                 printf("| Sizes   |----------+----------+----------|\n");
3217                 printf("| (Hex)   | %8X | %8X | %8X |\n", (unsigned int)header->tsize, (unsigned int)header->dsize, (unsigned int)header->bsize);
3218                 printf("+---------+----------+----------+----------+\n\n");
3219         }
3220
3221         free(header);
3222         ExitLinker();
3223 }
3224