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 prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
  33 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  34 int obj_format;                                 // Object format flag
  35 int debug;                                              // [1..9] Enable debugging levels
  36 int err_flag;                                   // '-e' specified
  37 int err_fd;                                             // File to write error messages to
  38 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  39 int list_fd;                                    // File to write listing to
  40 int regbank;                                    // RISC register bank
  41 int segpadsize;                                 // Segment padding size
  42 int endian;                                             // Host processor endianess
  43 char * objfname;                                // Object filename pointer
  44 char * firstfname;                              // First source filename
  45 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  46 char * searchpath;                              // Search path for include files
  47 char defname[] = "noname.o";    // Default output filename
  48
  49
  50 //
  51 // Manipulate file extension.
  52 //
  53 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  54 // nonzero, any old extension is removed. If the file does not already have an
  55 // extension, 'extension' is appended to the filename.
  56 //
  57 char * fext(char * name, char * extension, int stripp)
  58 {
  59         char * s;
  60
  61         // Find beginning of "real" name (strip off path)
  62         char * beg = strrchr(name, SLASHCHAR);
  63
  64         if (beg == NULL)
  65                 beg = name;
  66
  67         // Clobber any old extension, if requested
  68         if (stripp)
  69         {
  70                 for(s=beg; *s && *s!='.'; ++s)
  71                         ;
  72
  73                 *s = '\0';
  74         }
  75
  76         if (strrchr(beg, '.') == NULL)
  77                 strcat(beg, extension);
  78
  79         return name;
  80 }
  81
  82
  83 //
  84 // Return 'item'nth element of semicolon-seperated pathnames specified in the
  85 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
  86 // nth path doesn't exist.
  87 //
  88 // ['item' ranges from 0 to N-1, where N = #elements in search path]
  89 //
  90 int nthpath(char * env_var, int itemno, char * buf)
  91 {
  92         char * s = searchpath;
  93
  94         if (s == NULL)
  95                 s = getenv(env_var);
  96
  97         if (s == NULL)
  98                 return 0;
  99
 100         while (itemno--)
 101                 while (*s != EOS && *s++ != ';')
 102                         ;
 103
 104         if (*s == EOS)
 105                 return 0;
 106
 107         while (*s != EOS && *s != ';')
 108                 *buf++ = *s++;
 109
 110         *buf++ = EOS;
 111
 112         return 1;
 113 }
 114
 115
 116 //
 117 // Display command line help
 118 //
 119 void DisplayHelp(void)
 120 {
 121         printf("Usage:\n"
 122                 "    %s [options] srcfile\n"
 123                 "\n"
 124                 "Options:\n"
 125                 "  -? or -h          Display usage information\n"
 126                 "  -dsymbol[=value]  Define symbol\n"
 127                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 128                 "  -f[format]        Output object file format\n"
 129                 "                    a: ALCYON (use this for ST)\n"
 130                 "                    b: BSD (use this for Jaguar)\n"
 131                 "  -i[path]          Directory to search for include files\n"
 132                 "  -l[filename]      Create an output listing file\n"
 133                 "  -n                Don't do things behind your back in RISC assembler\n"
 134                 "  -o file           Output file name\n"
 135                 "  -r[size]          Pad segments to boundary size specified\n"
 136                 "                    w: word (2 bytes, default alignment)\n"
 137                 "                    l: long (4 bytes)\n"
 138                 "                    p: phrase (8 bytes)\n"
 139                 "                    d: double phrase (16 bytes)\n"
 140                 "                    q: quad phrase (32 bytes)\n"
 141                 "  -s                Warn about possible short branches\n"
 142                 "  -u                Force referenced and undefined symbols global\n"
 143                 "  -v                Set verbose mode\n"
 144                 "  -y[pagelen]       Set page line length (default: 61)\n"
 145                 "\n", cmdlnexec);
 146 }
 147
 148
 149 //
 150 // Display version information
 151 //
 152 void DisplayVersion(void)
 153 {
 154         printf("\nReboot's Macro Assembler for Atari Jaguar\n"
 155                 "Copyright (C) 199x Landon Dyer, 2011-2015 Reboot\n"
 156                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 157 }
 158
 159
 160 //
 161 // Process command line arguments and do an assembly
 162 //
 163 int Process(int argc, char ** argv)
 164 {
 165         int argno;                                              // Argument number
 166         SYM * sy;                                               // Pointer to a symbol record
 167         char * s;                                               // String pointer
 168         int fd;                                                 // File descriptor
 169         char fnbuf[FNSIZ];                              // Filename buffer
 170         int i;                                                  // Iterator
 171
 172         errcnt = 0;                                             // Initialise error count
 173         listing = 0;                                    // Initialise listing level
 174         list_flag = 0;                                  // Initialise listing flag
 175         verb_flag = perm_verb_flag;             // Initialise verbose flag
 176         as68_flag = 0;                                  // Initialise as68 kludge mode
 177         glob_flag = 0;                                  // Initialise .globl flag
 178         sbra_flag = 0;                                  // Initialise short branch flag
 179         debug = 0;                                              // Initialise debug flag
 180         searchpath = NULL;                              // Initialise search path
 181         objfname = NULL;                                // Initialise object filename
 182         list_fname = NULL;                              // Initialise listing filename
 183         err_fname = NULL;                               // Initialise error filename
 184         obj_format = BSD;                               // Initialise object format
 185         firstfname = NULL;                              // Initialise first filename
 186         err_fd = ERROUT;                                // Initialise error file descriptor
 187         err_flag = 0;                                   // Initialise error flag
 188         rgpu = 0;                                               // Initialise GPU assembly flag
 189         rdsp = 0;                                               // Initialise DSP assembly flag
 190         lsym_flag = 1;                                  // Include local symbols in object file
 191         regbank = BANK_N;                               // No RISC register bank specified
 192         orgactive = 0;                                  // Not in RISC org section
 193         orgwarning = 0;                                 // No ORG warning issued
 194         segpadsize = 2;                                 // Initialise segment padding size
 195
 196         // Initialise modules
 197         InitSymbolTable();                              // Symbol table
 198         InitTokenizer();                                // Tokenizer
 199         InitLineProcessor();                    // Line processor
 200         InitExpression();                               // Expression analyzer
 201         InitSection();                                  // Section manager / code generator
 202         InitMark();                                             // Mark tape-recorder
 203         InitMacro();                                    // Macro processor
 204         InitListing();                                  // Listing generator
 205
 206         // Process command line arguments and assemble source files
 207         for(argno=0; argno<argc; ++argno)
 208         {
 209                 if (*argv[argno] == '-')
 210                 {
 211                         switch (argv[argno][1])
 212                         {
 213                         case 'd':                               // Define symbol
 214                         case 'D':
 215                                 for(s=argv[argno]+2; *s!=EOS;)
 216                                 {
 217                                         if (*s++ == '=')
 218                                         {
 219                                                 s[-1] = EOS;
 220                                                 break;
 221                                         }
 222                                 }
 223
 224                                 if (argv[argno][2] == EOS)
 225                                 {
 226                                         printf("-d: empty symbol\n");
 227                                         errcnt++;
 228                                         return errcnt;
 229                                 }
 230
 231                                 sy = lookup(argv[argno] + 2, 0, 0);
 232
 233                                 if (sy == NULL)
 234                                 {
 235                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 236                                         sy->svalue = 0;
 237                                 }
 238
 239                                 sy->sattr = DEFINED | EQUATED | ABS;
 240                                 sy->svalue = (*s ? (VALUE)atoi(s) : 0);
 241                                 break;
 242                         case 'e':                               // Redirect error message output
 243                         case 'E':
 244                                 err_fname = argv[argno] + 2;
 245                                 break;
 246                         case 'f':                               // -f<format>
 247                         case 'F':
 248                                 switch (argv[argno][2])
 249                                 {
 250                                 case EOS:
 251                                 case 'a':                       // -fa = Alcyon [the default]
 252                                 case 'A':
 253                                         obj_format = ALCYON;
 254                                         break;
 255                                 case 'b':                       // -fb = BSD (Jaguar Recommended)
 256                                 case 'B':
 257                                         obj_format = BSD;
 258                                         break;
 259                                 default:
 260                                         printf("-f: unknown object format specified\n");
 261                                         errcnt++;
 262                                         return errcnt;
 263                                 }
 264                                 break;
 265                         case 'g':                               // Debugging flag
 266                         case 'G':
 267                                 printf("Debugging flag (-g) not yet implemented\n");
 268                                 break;
 269                         case 'i':                               // Set directory search path
 270                         case 'I':
 271                                 searchpath = argv[argno] + 2;
 272                                 break;
 273                         case 'l':                               // Produce listing file
 274                         case 'L':
 275                                 list_fname = argv[argno] + 2;
 276                                 listing = 1;
 277                                 list_flag = 1;
 278                                 lnsave++;
 279                                 break;
 280                         case 'o':                               // Direct object file output
 281                         case 'O':
 282                                 if (argv[argno][2] != EOS)
 283                                         objfname = argv[argno] + 2;
 284                                 else
 285                                 {
 286                                         if (++argno >= argc)
 287                                         {
 288                                                 printf("Missing argument to -o");
 289                                                 errcnt++;
 290                                                 return errcnt;
 291                                         }
 292
 293                                         objfname = argv[argno];
 294                                 }
 295
 296                                 break;
 297                         case 'p':               /* -p: generate ".PRG" executable output */
 298                         case 'P':
 299                                 /*
 300                                  * -p           .PRG generation w/o symbols
 301                                  * -ps  .PRG generation with symbols
 302                                  */
 303                                 switch (argv[argno][2])
 304                                 {
 305                                         case EOS:
 306                                                 prg_flag = 1;
 307                                                 break;
 308
 309                                         case 's':
 310                                         case 'S':
 311                                                 prg_flag = 2;
 312                                                 break;
 313
 314                                         default:
 315                                                 printf("-p: syntax error\n");
 316                                                 ++errcnt;
 317                                                 return errcnt;
 318                                 }
 319                                 break;
 320                         case 'r':                               // Pad seg to requested boundary size
 321                         case 'R':
 322                                 switch(argv[argno][2])
 323                                 {
 324                                 case 'w': case 'W': segpadsize = 2;  break;
 325                                 case 'l': case 'L': segpadsize = 4;  break;
 326                                 case 'p': case 'P': segpadsize = 8;  break;
 327                                 case 'd': case 'D': segpadsize = 16; break;
 328                                 case 'q': case 'Q': segpadsize = 32; break;
 329                                 default: segpadsize = 2; break; // Effective autoeven();
 330                                 }
 331                                 break;
 332                         case 's':                               // Warn about possible short branches
 333                         case 'S':
 334                                 sbra_flag = 1;
 335                                 break;
 336                         case 'u':                               // Make undefined symbols .globl
 337                         case 'U':
 338                                 glob_flag = 1;
 339                                 break;
 340                         case 'v':                               // Verbose flag
 341                         case 'V':
 342                                 verb_flag++;
 343
 344                                 if (verb_flag > 1)
 345                                         DisplayVersion();
 346
 347                                 break;
 348                         case 'x':                               // Turn on debugging
 349                         case 'X':
 350                                 debug = 1;
 351                                 printf("~ Debugging ON\n");
 352                                 break;
 353                         case 'y':                               // -y<pagelen>
 354                         case 'Y':
 355                                 pagelen = atoi(argv[argno] + 2);
 356
 357                                 if (pagelen < 10)
 358                                 {
 359                                         printf("-y: bad page length\n");
 360                                         ++errcnt;
 361                                         return errcnt;
 362                                 }
 363
 364                                 break;
 365                         case EOS:                               // Input is stdin
 366                                 if (firstfname == NULL) // Kludge first filename
 367                                         firstfname = defname;
 368
 369                                 include(0, "(stdin)");
 370                                 Assemble();
 371                                 break;
 372                         case 'h':                               // Display command line usage
 373                         case 'H':
 374                         case '?':
 375                                 DisplayVersion();
 376                                 DisplayHelp();
 377                                 errcnt++;
 378                                 break;
 379                         case 'n':                               // Turn off legacy mode
 380                         case 'N':
 381                                 legacy_flag = 0;
 382                                 printf("Legacy mode OFF\n");
 383                                 break;
 384                         default:
 385                                 DisplayVersion();
 386                                 printf("Unknown switch: %s\n\n", argv[argno]);
 387                                 DisplayHelp();
 388                                 errcnt++;
 389                                 break;
 390                         }
 391                 }
 392                 else
 393                 {
 394                         // Record first filename.
 395                         if (firstfname == NULL)
 396                                 firstfname = argv[argno];
 397
 398                         strcpy(fnbuf, argv[argno]);
 399                         fext(fnbuf, ".s", 0);
 400                         fd = open(fnbuf, 0);
 401
 402                         if (fd < 0)
 403                         {
 404                                 printf("Cannot open: %s\n", fnbuf);
 405                                 errcnt++;
 406                                 continue;
 407                         }
 408
 409                         include(fd, fnbuf);
 410                         Assemble();
 411                 }
 412         }
 413
 414         // Wind-up processing;
 415         // o  save current section (no more code generation)
 416         // o  do auto-even of all sections (or boundary alignment as requested
 417         //    through '-r')
 418         // o  determine name of object file:
 419         //    -  "foo.o" for linkable output;
 420         //    -  "foo.prg" for GEMDOS executable (-p flag).
 421         SaveSection();
 422
 423         for(i=TEXT; i<=BSS; i<<=1)
 424         {
 425                 SwitchSection(i);
 426
 427                 switch(segpadsize)
 428                 {
 429                 case 2:  d_even();    break;
 430                 case 4:  d_long();    break;
 431                 case 8:  d_phrase();  break;
 432                 case 16: d_dphrase(); break;
 433                 case 32: d_qphrase(); break;
 434                 }
 435
 436                 SaveSection();
 437         }
 438
 439         if (objfname == NULL)
 440         {
 441                 if (firstfname == NULL)
 442                         firstfname = defname;
 443
 444                 strcpy(fnbuf, firstfname);
 445                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 446                 fext(fnbuf, ".o", 1);
 447                 objfname = fnbuf;
 448         }
 449
 450         // With one pass finished, go back and:
 451         // (1)   run through all the fixups and resolve forward references;
 452         // (1.5) ensure that remaining fixups can be handled by the linker
 453         //       (`lo68' format, extended (postfix) format....)
 454         // (2)   generate the output file image and symbol table;
 455         // (3)   generate relocation information from left-over fixups.
 456         ResolveAllFixups();                                             // Do all fixups
 457         StopMark();                                                             // Stop mark tape-recorder
 458
 459         if (errcnt == 0)
 460         {
 461                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 462                         cantcreat(objfname);
 463
 464                 if (verb_flag)
 465                 {
 466                         s = (prg_flag ? "executable" : "object");
 467                         printf("[Writing %s file: %s]\n", s, objfname);
 468                 }
 469
 470                 WriteObject(fd);
 471                 close(fd);
 472
 473                 if (errcnt != 0)
 474                         unlink(objfname);
 475         }
 476
 477         if (list_flag)
 478         {
 479                 if (verb_flag)
 480                         printf("[Wrapping-up listing file]\n");
 481
 482                 listing = 1;
 483                 symtable();
 484                 close(list_fd);
 485         }
 486
 487         if (err_flag)
 488                 close(err_fd);
 489
 490         DEBUG dump_everything();
 491
 492         return errcnt;
 493 }
 494
 495
 496 //
 497 // Determine processor endianess
 498 //
 499 int GetEndianess(void)
 500 {
 501         int i = 1;
 502         char * p = (char *)&i;
 503
 504         if (p[0] == 1)
 505                 return 0;
 506
 507         return 1;
 508 }
 509
 510
 511 //
 512 // Application entry point
 513 //
 514 int main(int argc, char ** argv)
 515 {
 516         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 517         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 518         cmdlnexec = argv[0];                    // Obtain executable name
 519
 520         endian = GetEndianess();                // Get processor endianess
 521
 522         // If commands were passed in, process them
 523         if (argc > 1)
 524                 return Process(argc - 1, argv + 1);
 525
 526         DisplayVersion();
 527         DisplayHelp();
 528
 529         return 0;
 530 }
 531