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

   1 //
   2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
   3 // RMAC.C - Main Application Code
   4 // Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
   5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
   6 // Source Utilised with the Kind Permission of Landon Dyer
   7 //
   8
   9 #include "rmac.h"
  10 #include "error.h"
  11 #include "listing.h"
  12 #include "procln.h"
  13 #include "token.h"
  14 #include "expr.h"
  15 #include "sect.h"
  16 #include "mark.h"
  17 #include "macro.h"
  18 #include "riscasm.h"
  19 #include "direct.h"
  20 #include "version.h"
  21 #include "debug.h"
  22 #include "symbol.h"
  23 #include "object.h"
  24
  25 int perm_verb_flag;                                     // Permanently verbose, interactive mode
  26 int list_flag;                                          // "-l" Listing flag on command line
  27 int verb_flag;                                          // Be verbose about what's going on
  28 int as68_flag;                                          // as68 kludge mode
  29 int glob_flag;                                          // Assume undefined symbols are global
  30 int lsym_flag;                                          // Include local symbols in object file
  31 int sbra_flag;                                          // Warn about possible short branches
  32 int obj_format;                                         // Object format flag
  33 int debug;                                                      // [1..9] Enable debugging levels
  34 int err_flag;                                           // '-e' specified
  35 int err_fd;                                                     // File to write error messages to
  36 int rgpu, rdsp;                                         // Assembling Jaguar GPU or DSP code
  37 int list_fd;                                            // File to write listing to
  38 int regbank;                                            // RISC register bank
  39 int segpadsize;                                         // Segment padding size
  40 int endian;                                                     // Host processor endianess
  41 char * objfname;                                        // Object filename pointer
  42 char * firstfname;                                      // First source filename
  43 char * cmdlnexec;                                       // Executable name, pointer to ARGV[0]
  44 char * searchpath;                                      // Search path for include files
  45 char defname[] = "noname.o";            // Default output filename
  46
  47
  48 //
  49 // Copy stuff around, return pointer to dest+count+1 (doesn't handle overlap)
  50 //
  51 char * copy(char * dest, char * src, LONG count)
  52 {
  53         while (count--)
  54                 *dest++ = *src++;
  55
  56         return dest;
  57 }
  58
  59
  60 //
  61 // Clear a region of memory
  62 //
  63 void clear(char * dest, LONG count)
  64 {
  65         while(count--)
  66                 *dest++ = 0;
  67 }
  68
  69
  70 //
  71 // Check to see if the string is a keyword. Returns -1, or a value from the
  72 // 'accept[]' table
  73 //
  74 int kmatch(char * p, int * base, int * check, int * tab, int * accept)
  75 {
  76         int state;
  77         int j;
  78
  79         for(state=0; state>=0;)
  80         {
  81                 j = base[state] + (int)tolowertab[*p];
  82
  83                 if (check[j] != state)
  84                 {                               // Reject, character doesn't match
  85                         state = -1;                                        // No match
  86                         break;
  87                 }
  88
  89                 if (!*++p)
  90                 {                                           // Must accept or reject at EOS
  91                         state = accept[j];                                 // (-1 on no terminal match)
  92                         break;
  93                 }
  94
  95                 state = tab[j];
  96         }
  97
  98         return state;
  99 }
 100
 101
 102 //
 103 // Auto-even a section
 104 //
 105 void autoeven(int sect)
 106 {
 107         switchsect(sect);
 108         d_even();
 109         savsect();
 110 }
 111
 112
 113 //
 114 // Manipulate file extension.
 115 // `name' must be large enough to hold any possible filename.
 116 // If `stripp' is nonzero, any old extension is removed.
 117 // Then, if the file does not already have an extension,
 118 // `extension' is appended to the filename.
 119 //
 120 char * fext(char * name, char * extension, int stripp)
 121 {
 122         char * s, * beg;                                           // String pointers
 123
 124         // Find beginning of "real" name
 125         beg = name + strlen(name) - 1;
 126
 127         for(; beg>name; --beg)
 128         {
 129                 if (*beg == SLASHCHAR)
 130                 {
 131                         ++beg;
 132                         break;
 133                 }
 134         }
 135
 136         if (stripp)
 137         {                                             // Clobber any old extension
 138                 for(s=beg; *s && *s!='.'; ++s)
 139                         ;
 140
 141                 *s = '\0';
 142         }
 143
 144         for(s=beg; *s!='.'; ++s)
 145         {
 146                 if (!*s)
 147                 {                                             // Append the new extension
 148                         strcat(beg, extension);
 149                         break;
 150                 }
 151         }
 152
 153         return name;
 154 }
 155
 156
 157 //
 158 // Return `item'nth element of semicolon-seperated pathnames specified in the
 159 // enviroment string `s'. Copy the pathname to `buf'.  Return 0 if the `item'
 160 // nth path doesn't exist.
 161 //
 162 // [`item' ranges from 0 to N-1, where N = #elements in search path]
 163 //
 164 int nthpath(char * env_var, int itemno, char * buf)
 165 {
 166         char * s = searchpath;
 167
 168         if (s == NULL)
 169                 s = getenv(env_var);
 170
 171         if (s == NULL)
 172                 return 0;
 173
 174         while (itemno--)
 175                 while (*s != EOS && *s++ != ';')
 176                         ;
 177
 178         if (*s == EOS)
 179                 return 0;
 180
 181         while (*s != EOS && *s != ';')
 182                 *buf++ = *s++;
 183
 184         *buf++ = EOS;
 185
 186         return 1;
 187 }
 188
 189
 190 //
 191 // Display Command Line Help
 192 //
 193 void display_help(void)
 194 {
 195         printf("Usage:\n"
 196                 "    %s [options] srcfile\n"
 197                 "\n"
 198                 "Options:\n"
 199                 "  -? or -h          Display usage information\n"
 200                 "  -dsymbol[=value]  Define symbol\n"
 201                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 202                 "  -f[format]        Output object file format\n"
 203                 "                    b: BSD (use this for Jaguar)\n"
 204                 "  -i[path]          Directory to search for include files\n"
 205                 "  -l[filename]      Create an output listing file\n"
 206                 "  -o file           Output file name\n"
 207                 "  -r[size]          Pad segments to boundary size specified\n"
 208                 "                    w: word (2 bytes, default alignment)\n"
 209                 "                    l: long (4 bytes)\n"
 210                 "                    p: phrase (8 bytes)\n"
 211                 "                    d: double phrase (16 bytes)\n"
 212                 "                    q: quad phrase (32 bytes)\n"
 213                 "  -s                Warn about possible short branches\n"
 214                 "  -u                Force referenced and undefined symbols global\n"
 215                 "  -v                Set verbose mode\n"
 216                 "  -y[pagelen]       Set page line length (default: 61)\n"
 217                 "\n", cmdlnexec);
 218 }
 219
 220
 221 //
 222 // Display Version Information
 223 //
 224 void display_version(void)
 225 {
 226         printf("\nReboot's Macro Assembler for Atari Jaguar\n"
 227                 "Copyright (C) 199x Landon Dyer, 2011 Reboot\n"
 228                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 229 }
 230
 231
 232 //
 233 // Process Command Line Arguments and do an Assembly
 234 //
 235 int process(int argc, char ** argv)
 236 {
 237         int argno;                                              // Argument number
 238         SYM * sy;                                               // Pointer to a symbol record
 239         char * s;                                               // String pointer
 240         int fd;                                                 // File descriptor
 241         char fnbuf[FNSIZ];                              // Filename buffer
 242         int i;                                                  // Iterator
 243
 244         errcnt = 0;                                             // Initialise error count
 245         listing = 0;                                    // Initialise listing level
 246         list_flag = 0;                                  // Initialise listing flag
 247         verb_flag = perm_verb_flag;             // Initialise verbose flag
 248         as68_flag = 0;                                  // Initialise as68 kludge mode
 249         glob_flag = 0;                                  // Initialise .globl flag
 250         sbra_flag = 0;                                  // Initialise short branch flag
 251         debug = 0;                                              // Initialise debug flag
 252         searchpath = NULL;                              // Initialise search path
 253         objfname = NULL;                                // Initialise object filename
 254         list_fname = NULL;                              // Initialise listing filename
 255         err_fname = NULL;                               // Initialise error filename
 256         obj_format = BSD;                               // Initialise object format
 257         firstfname = NULL;                              // Initialise first filename
 258         err_fd = ERROUT;                                // Initialise error file descriptor
 259         err_flag = 0;                                   // Initialise error flag
 260         rgpu = 0;                                               // Initialise GPU assembly flag
 261         rdsp = 0;                                               // Initialise DSP assembly flag
 262         lsym_flag = 1;                                  // Include local symbols in object file
 263         regbank = BANK_N;                               // No RISC register bank specified
 264         orgactive = 0;                                  // Not in RISC org section
 265         orgwarning = 0;                                 // No ORG warning issued
 266         segpadsize = 2;                                 // Initialise segment padding size
 267
 268         // Initialise modules
 269         InitSymbolTable();                              // Symbol table
 270         InitTokenizer();                                // Tokenizer
 271         InitLineProcessor();                    // Line processor
 272         InitExpression();                               // Expression analyzer
 273         InitSection();                                  // Section manager / code generator
 274         InitMark();                                             // Mark tape-recorder
 275         InitMacro();                                    // Macro processor
 276         InitListing();                                  // Listing generator
 277
 278         // Process command line arguments and assemble source files
 279         for(argno=0; argno<argc; ++argno)
 280         {
 281                 if (*argv[argno] == '-')
 282                 {
 283                         switch (argv[argno][1])
 284                         {
 285                         case 'd':                                       // Define symbol
 286                         case 'D':
 287                                 for(s=argv[argno]+2; *s!=EOS;)
 288                                 {
 289                                         if (*s++ == '=')
 290                                         {
 291                                                 s[-1] = EOS;
 292                                                 break;
 293                                         }
 294                                 }
 295
 296                                 if (argv[argno][2] == EOS)
 297                                 {
 298                                         printf("-d: empty symbol\n");
 299                                         errcnt++;
 300                                         return errcnt;
 301                                 }
 302
 303                                 sy = lookup(argv[argno] + 2, 0, 0);
 304
 305                                 if (sy == NULL)
 306                                 {
 307                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 308                                         sy->svalue = 0;
 309                                 }
 310
 311                                 sy->sattr = DEFINED | EQUATED | ABS;
 312 #if 0
 313                                 if (*s)
 314                                         sy->svalue = (VALUE)atoi(s);
 315                                 else
 316                                         sy->svalue = 0;
 317 #else
 318                                 sy->svalue = (*s ? (VALUE)atoi(s) : 0);
 319 #endif
 320                                 break;
 321                         case 'e':                                       // Redirect error message output
 322                         case 'E':
 323                                 err_fname = argv[argno] + 2;
 324                                 break;
 325                         case 'f':                                       // -f<format>
 326                         case 'F':
 327                                 switch (argv[argno][2])
 328                                 {
 329                                 case EOS:
 330                                 case 'b':                                 // -fb = BSD (Jaguar Recommended)
 331                                 case 'B':
 332                                         obj_format = BSD;
 333                                         break;
 334                                 default:
 335                                         printf("-f: unknown object format specified\n");
 336                                         errcnt++;
 337                                         return errcnt;
 338                                 }
 339                                 break;
 340                         case 'g':                                       // Debugging flag
 341                         case 'G':
 342                                 printf("Debugging flag (-g) not yet implemented\n");
 343                                 break;
 344                         case 'i':                                       // Set directory search path
 345                         case 'I':
 346                                 searchpath = argv[argno] + 2;
 347                                 break;
 348                         case 'l':                                       // Produce listing file
 349                         case 'L':
 350                                 list_fname = argv[argno] + 2;
 351                                 listing = 1;
 352                                 list_flag = 1;
 353                                 lnsave++;
 354                                 break;
 355                         case 'o':                                       // Direct object file output
 356                         case 'O':
 357                                 if (argv[argno][2] != EOS)
 358                                         objfname = argv[argno] + 2;
 359                                 else
 360                                 {
 361                                         if (++argno >= argc)
 362                                         {
 363                                                 printf("Missing argument to -o");
 364                                                 errcnt++;
 365                                                 return errcnt;
 366                                         }
 367                                         objfname = argv[argno];
 368                                 }
 369
 370                                 break;
 371                         case 'r':                                       // Pad seg to requested boundary size
 372                         case 'R':
 373                                 switch(argv[argno][2])
 374                                 {
 375                                 case 'w': case 'W': segpadsize = 2;  break;
 376                                 case 'l': case 'L': segpadsize = 4;  break;
 377                                 case 'p': case 'P': segpadsize = 8;  break;
 378                                 case 'd': case 'D': segpadsize = 16; break;
 379                                 case 'q': case 'Q': segpadsize = 32; break;
 380                                 default: segpadsize = 2; break;           // Effective autoeven();
 381                                 }
 382                                 break;
 383                         case 's':                                       // Warn about possible short branches
 384                         case 'S':
 385                                 sbra_flag = 1;
 386                                 break;
 387                         case 'u':                                       // Make undefined symbols .globl
 388                         case 'U':
 389                                 glob_flag = 1;
 390                                 break;
 391                         case 'v':                                       // Verbose flag
 392                         case 'V':
 393                                 verb_flag++;
 394
 395                                 if (verb_flag > 1)
 396                                         display_version();
 397
 398                                 break;
 399                         case 'x':                                       // Turn on debugging
 400                         case 'X':
 401                                 debug = 1;
 402                                 printf("~ Debugging ON\n");
 403                                 break;
 404                         case 'y':                                       // -y<pagelen>
 405                         case 'Y':
 406                                 pagelen = atoi(argv[argno] + 2);
 407
 408                                 if (pagelen < 10)
 409                                 {
 410                                         printf("-y: bad page length\n");
 411                                         ++errcnt;
 412                                         return errcnt;
 413                                 }
 414
 415                                 break;
 416                         case EOS:                                       // Input is stdin
 417                                 if (firstfname == NULL)                       // Kludge first filename
 418                                         firstfname = defname;
 419
 420                                 include(0, "(stdin)");
 421                                 Assemble();
 422                                 break;
 423                         case 'h':                                       // Display command line usage
 424                         case 'H':
 425                         case '?':
 426                                 display_version();
 427                                 display_help();
 428                                 errcnt++;
 429                                 break;
 430                         default:
 431                                 display_version();
 432                                 printf("Unknown switch: %s\n\n", argv[argno]);
 433                                 display_help();
 434                                 errcnt++;
 435                                 break;
 436                         }
 437                 }
 438                 else
 439                 {
 440                         // Record first filename.
 441                         if (firstfname == NULL)
 442                                 firstfname = argv[argno];
 443
 444                         strcpy(fnbuf, argv[argno]);
 445                         fext(fnbuf, ".s", 0);
 446                         fd = open(fnbuf, 0);
 447
 448                         if (fd < 0)
 449                         {
 450                                 printf("Cannot open: %s\n", fnbuf);
 451                                 errcnt++;
 452                                 continue;
 453                         }
 454
 455                         include(fd, fnbuf);
 456                         Assemble();
 457                 }
 458         }
 459
 460         // Wind-up processing;
 461         // o  save current section (no more code generation)
 462         // o  do auto-even of all sections (or boundary alignment as requested through '-r')
 463         // o  determine name of object file:
 464         //    -  "foo.o" for linkable output;
 465         //    -  "foo.prg" for GEMDOS executable (-p flag).
 466         savsect();
 467
 468         for(i=TEXT; i<=BSS; i<<=1)
 469         {
 470                 switchsect(i);
 471
 472                 switch(segpadsize)
 473                 {
 474                 case 2:  d_even();    break;
 475                 case 4:  d_long();    break;
 476                 case 8:  d_phrase();  break;
 477                 case 16: d_dphrase(); break;
 478                 case 32: d_qphrase(); break;
 479                 }
 480
 481                 savsect();
 482         }
 483
 484         if (objfname == NULL)
 485         {
 486                 if (firstfname == NULL)
 487                         firstfname = defname;
 488
 489                 strcpy(fnbuf, firstfname);
 490                 //fext(fnbuf, prg_flag ? ".prg" : ".o", 1);
 491                 fext(fnbuf, ".o", 1);
 492                 objfname = fnbuf;
 493         }
 494
 495         // With one pass finished, go back and:
 496         // (1)   run through all the fixups and resolve forward references;
 497         // (1.5) ensure that remaining fixups can be handled by the linker
 498         //       (`lo68' format, extended (postfix) format....)
 499         // (2)   generate the output file image and symbol table;
 500         // (3)   generate relocation information from left-over fixups.
 501         ResolveAllFixups();                                             // Do all fixups
 502         stopmark();                                                             // Stop mark tape-recorder
 503
 504         if (errcnt == 0)
 505         {
 506                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 507                         cantcreat(objfname);
 508
 509                 if (verb_flag)
 510                 {
 511                         s = "object";
 512                         printf("[Writing %s file: %s]\n", s, objfname);
 513                 }
 514
 515                 object((WORD)fd);
 516                 close(fd);
 517
 518                 if (errcnt != 0)
 519                         unlink(objfname);
 520         }
 521
 522         if (list_flag)
 523         {
 524                 if (verb_flag)
 525                         printf("[Wrapping-up listing file]\n");
 526
 527                 listing = 1;
 528                 symtable();
 529                 close(list_fd);
 530         }
 531
 532         if (err_flag)
 533                 close(err_fd);
 534
 535         DEBUG dump_everything();
 536
 537         return errcnt;
 538 }
 539
 540
 541 //
 542 // Determine Processor Endianess
 543 //
 544 int get_endianess(void)
 545 {
 546         int i = 1;
 547         char * p = (char *)&i;
 548
 549         if (p[0] == 1)
 550                 return 0;
 551
 552         return 1;
 553 }
 554
 555
 556 //
 557 // Application Entry Point; Handle the Command Line
 558 //
 559 int main(int argc, char ** argv)
 560 {
 561         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 562         cmdlnexec = argv[0];                    // Obtain executable name
 563
 564         endian = get_endianess();               // Get processor endianess
 565
 566         // If commands were passed in, process them
 567         if (argc > 1)
 568         {
 569                 return process(argc - 1, argv + 1);
 570         }
 571
 572         display_version();
 573         display_help();
 574
 575         return 0;
 576 }