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 int optim_flags[OPT_COUNT];     // Specific optimisations on/off matrix
  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                 "  +o[value]         Turn a specific optimisation on\n"
 136                 "  ~o[value]         Turn a specific optimisation off\n"
 137                 "  +oall             Turn all optimisations on\n"
 138                 "  ~oall             Turn all optimisations off\n"
 139                 "  -p                Create an ST .prg (without symbols)\n"
 140                 "  -ps               Create an ST .prg (with symbols)\n"
 141                 "                    Forces -fa\n"
 142                 "  -r[size]          Pad segments to boundary size specified\n"
 143                 "                    w: word (2 bytes, default alignment)\n"
 144                 "                    l: long (4 bytes)\n"
 145                 "                    p: phrase (8 bytes)\n"
 146                 "                    d: double phrase (16 bytes)\n"
 147                 "                    q: quad phrase (32 bytes)\n"
 148                 "  -s                Warn about possible short branches\n"
 149                 "                    and applied optimisations\n"
 150                 "  -u                Force referenced and undefined symbols global\n"
 151                 "  -v                Set verbose mode\n"
 152                 "  -x                Turn on debugging mode\n"
 153                 "  -y[pagelen]       Set page line length (default: 61)\n"
 154                 "\n", cmdlnexec);
 155 }
 156
 157
 158 //
 159 // Display version information
 160 //
 161 void DisplayVersion(void)
 162 {
 163         printf("\n"
 164                 " _ __ _ __ ___   __ _  ___ \n"
 165                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 166                 "| |  | | | | | | (_| | (__ \n"
 167                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 168                 "\nReboot's Macro Assembler\n"
 169                 "Copyright (C) 199x Landon Dyer, 2011-2015 Reboot\n"
 170                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 171 }
 172
 173
 174 //
 175 // Parse optimisation options
 176 //
 177 int ParseOptimization(char * optstring)
 178 {
 179     int onoff = 0;
 180
 181     if (*optstring == '+')
 182         onoff = 1;
 183     else if (*optstring != '~')
 184         return ERROR;
 185
 186     if ((optstring[2] == 'a' || optstring[2] == 'A') &&
 187         (optstring[3] == 'l' || optstring[3] == 'L') &&
 188         (optstring[4] == 'l' || optstring[4] == 'L'))
 189     {
 190         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 191         return OK;
 192     }
 193     else if (optstring[1] == 'o' || optstring[1] == 'O') //Turn on specific optimisation
 194         {
 195         int opt_no = atoi(&optstring[2]);
 196         if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 197             optim_flags[opt_no] = onoff;
 198         else
 199         {
 200             return ERROR;
 201         }
 202     }
 203     else
 204     {
 205         return ERROR;
 206     }
 207 }
 208
 209
 210 //
 211 // Process command line arguments and do an assembly
 212 //
 213 int Process(int argc, char ** argv)
 214 {
 215         int argno;                                              // Argument number
 216         SYM * sy;                                               // Pointer to a symbol record
 217         char * s;                                               // String pointer
 218         int fd;                                                 // File descriptor
 219         char fnbuf[FNSIZ];                              // Filename buffer
 220         int i;                                                  // Iterator
 221
 222         errcnt = 0;                                             // Initialise error count
 223         listing = 0;                                    // Initialise listing level
 224         list_flag = 0;                                  // Initialise listing flag
 225         verb_flag = perm_verb_flag;             // Initialise verbose flag
 226         as68_flag = 0;                                  // Initialise as68 kludge mode
 227         glob_flag = 0;                                  // Initialise .globl flag
 228         sbra_flag = 0;                                  // Initialise short branch flag
 229         debug = 0;                                              // Initialise debug flag
 230         searchpath = NULL;                              // Initialise search path
 231         objfname = NULL;                                // Initialise object filename
 232         list_fname = NULL;                              // Initialise listing filename
 233         err_fname = NULL;                               // Initialise error filename
 234         obj_format = BSD;                               // Initialise object format
 235         firstfname = NULL;                              // Initialise first filename
 236         err_fd = ERROUT;                                // Initialise error file descriptor
 237         err_flag = 0;                                   // Initialise error flag
 238         rgpu = 0;                                               // Initialise GPU assembly flag
 239         rdsp = 0;                                               // Initialise DSP assembly flag
 240         lsym_flag = 1;                                  // Include local symbols in object file
 241         regbank = BANK_N;                               // No RISC register bank specified
 242         orgactive = 0;                                  // Not in RISC org section
 243         orgwarning = 0;                                 // No ORG warning issued
 244         segpadsize = 2;                                 // Initialise segment padding size
 245
 246         // Initialise modules
 247         InitSymbolTable();                              // Symbol table
 248         InitTokenizer();                                // Tokenizer
 249         InitLineProcessor();                    // Line processor
 250         InitExpression();                               // Expression analyzer
 251         InitSection();                                  // Section manager / code generator
 252         InitMark();                                             // Mark tape-recorder
 253         InitMacro();                                    // Macro processor
 254         InitListing();                                  // Listing generator
 255
 256         // Process command line arguments and assemble source files
 257         for(argno=0; argno<argc; ++argno)
 258         {
 259                 if (*argv[argno] == '-')
 260                 {
 261                         switch (argv[argno][1])
 262                         {
 263                         case 'd':                               // Define symbol
 264                         case 'D':
 265                                 for(s=argv[argno]+2; *s!=EOS;)
 266                                 {
 267                                         if (*s++ == '=')
 268                                         {
 269                                                 s[-1] = EOS;
 270                                                 break;
 271                                         }
 272                                 }
 273
 274                                 if (argv[argno][2] == EOS)
 275                                 {
 276                                         printf("-d: empty symbol\n");
 277                                         errcnt++;
 278                                         return errcnt;
 279                                 }
 280
 281                                 sy = lookup(argv[argno] + 2, 0, 0);
 282
 283                                 if (sy == NULL)
 284                                 {
 285                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 286                                         sy->svalue = 0;
 287                                 }
 288
 289                                 sy->sattr = DEFINED | EQUATED | ABS;
 290                                 sy->svalue = (*s ? (VALUE)atoi(s) : 0);
 291                                 break;
 292                         case 'e':                               // Redirect error message output
 293                         case 'E':
 294                                 err_fname = argv[argno] + 2;
 295                                 break;
 296                         case 'f':                               // -f<format>
 297                         case 'F':
 298                                 switch (argv[argno][2])
 299                                 {
 300                                 case EOS:
 301                                 case 'a':                       // -fa = Alcyon [the default]
 302                                 case 'A':
 303                                         obj_format = ALCYON;
 304                                         break;
 305                                 case 'b':                       // -fb = BSD (Jaguar Recommended)
 306                                 case 'B':
 307                                         obj_format = BSD;
 308                                         break;
 309                                 default:
 310                                         printf("-f: unknown object format specified\n");
 311                                         errcnt++;
 312                                         return errcnt;
 313                                 }
 314                                 break;
 315                         case 'g':                               // Debugging flag
 316                         case 'G':
 317                                 printf("Debugging flag (-g) not yet implemented\n");
 318                                 break;
 319                         case 'i':                               // Set directory search path
 320                         case 'I':
 321                                 searchpath = argv[argno] + 2;
 322                                 break;
 323                         case 'l':                               // Produce listing file
 324                         case 'L':
 325                                 list_fname = argv[argno] + 2;
 326                                 listing = 1;
 327                                 list_flag = 1;
 328                                 lnsave++;
 329                                 break;
 330                         case 'o':                               // Direct object file output
 331                         case 'O':
 332                                 if (argv[argno][2] != EOS)
 333                                         objfname = argv[argno] + 2;
 334                                 else
 335                                 {
 336                                         if (++argno >= argc)
 337                                         {
 338                                                 printf("Missing argument to -o");
 339                                                 errcnt++;
 340                                                 return errcnt;
 341                                         }
 342
 343                                         objfname = argv[argno];
 344                                 }
 345
 346                                 break;
 347                         case 'p':               /* -p: generate ".PRG" executable output */
 348                         case 'P':
 349                                 /*
 350                                  * -p           .PRG generation w/o symbols
 351                                  * -ps  .PRG generation with symbols
 352                                  */
 353                                 switch (argv[argno][2])
 354                                 {
 355                                         case EOS:
 356                                                 prg_flag = 1;
 357                                                 break;
 358
 359                                         case 's':
 360                                         case 'S':
 361                                                 prg_flag = 2;
 362                                                 break;
 363
 364                                         default:
 365                                                 printf("-p: syntax error\n");
 366                                                 ++errcnt;
 367                                                 return errcnt;
 368                                 }
 369
 370                                 // Enforce Alcyon object format - kind of silly
 371                                 // to ask for .prg output without it!
 372                                 obj_format = ALCYON;
 373                                 break;
 374                         case 'r':                               // Pad seg to requested boundary size
 375                         case 'R':
 376                                 switch(argv[argno][2])
 377                                 {
 378                                 case 'w': case 'W': segpadsize = 2;  break;
 379                                 case 'l': case 'L': segpadsize = 4;  break;
 380                                 case 'p': case 'P': segpadsize = 8;  break;
 381                                 case 'd': case 'D': segpadsize = 16; break;
 382                                 case 'q': case 'Q': segpadsize = 32; break;
 383                                 default: segpadsize = 2; break; // Effective autoeven();
 384                                 }
 385                                 break;
 386                         case 's':                               // Warn about possible short branches
 387                         case 'S':
 388                                 sbra_flag = 1;
 389                                 break;
 390                         case 'u':                               // Make undefined symbols .globl
 391                         case 'U':
 392                                 glob_flag = 1;
 393                                 break;
 394                         case 'v':                               // Verbose flag
 395                         case 'V':
 396                                 verb_flag++;
 397
 398                                 if (verb_flag > 1)
 399                                         DisplayVersion();
 400
 401                                 break;
 402                         case 'x':                               // Turn on debugging
 403                         case 'X':
 404                                 debug = 1;
 405                                 printf("~ Debugging ON\n");
 406                                 break;
 407                         case 'y':                               // -y<pagelen>
 408                         case 'Y':
 409                                 pagelen = atoi(argv[argno] + 2);
 410
 411                                 if (pagelen < 10)
 412                                 {
 413                                         printf("-y: bad page length\n");
 414                                         ++errcnt;
 415                                         return errcnt;
 416                                 }
 417
 418                                 break;
 419                         case EOS:                               // Input is stdin
 420                                 if (firstfname == NULL) // Kludge first filename
 421                                         firstfname = defname;
 422
 423                                 include(0, "(stdin)");
 424                                 Assemble();
 425                                 break;
 426                         case 'h':                               // Display command line usage
 427                         case 'H':
 428                         case '?':
 429                                 DisplayVersion();
 430                                 DisplayHelp();
 431                                 errcnt++;
 432                                 break;
 433                         case 'n':                               // Turn off legacy mode
 434                         case 'N':
 435                                 legacy_flag = 0;
 436                                 printf("Legacy mode OFF\n");
 437                                 break;
 438                         default:
 439                                 DisplayVersion();
 440                                 printf("Unknown switch: %s\n\n", argv[argno]);
 441                                 DisplayHelp();
 442                                 errcnt++;
 443                                 break;
 444                         }
 445                 }
 446                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 447                 {
 448                         if (ParseOptimization(argv[argno]) != OK)
 449                         {
 450                                 DisplayVersion();
 451                                 printf("Unknown switch: %s\n\n", argv[argno]);
 452                                 DisplayHelp();
 453                                 errcnt++;
 454                                 break;
 455                         }
 456                 }
 457                 else
 458                 {
 459                         // Record first filename.
 460                         if (firstfname == NULL)
 461                                 firstfname = argv[argno];
 462
 463                         strcpy(fnbuf, argv[argno]);
 464                         fext(fnbuf, ".s", 0);
 465                         fd = open(fnbuf, 0);
 466
 467                         if (fd < 0)
 468                         {
 469                                 printf("Cannot open: %s\n", fnbuf);
 470                                 errcnt++;
 471                                 continue;
 472                         }
 473
 474                         include(fd, fnbuf);
 475                         Assemble();
 476                 }
 477         }
 478
 479         // Wind-up processing;
 480         // o  save current section (no more code generation)
 481         // o  do auto-even of all sections (or boundary alignment as requested
 482         //    through '-r')
 483         // o  determine name of object file:
 484         //    -  "foo.o" for linkable output;
 485         //    -  "foo.prg" for GEMDOS executable (-p flag).
 486         SaveSection();
 487
 488         for(i=TEXT; i<=BSS; i<<=1)
 489         {
 490                 SwitchSection(i);
 491
 492                 switch(segpadsize)
 493                 {
 494                 case 2:  d_even();    break;
 495                 case 4:  d_long();    break;
 496                 case 8:  d_phrase();  break;
 497                 case 16: d_dphrase(); break;
 498                 case 32: d_qphrase(); break;
 499                 }
 500
 501                 SaveSection();
 502         }
 503
 504         if (objfname == NULL)
 505         {
 506                 if (firstfname == NULL)
 507                         firstfname = defname;
 508
 509                 strcpy(fnbuf, firstfname);
 510                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 511                 objfname = fnbuf;
 512         }
 513
 514         // With one pass finished, go back and:
 515         // (1)   run through all the fixups and resolve forward references;
 516         // (1.5) ensure that remaining fixups can be handled by the linker
 517         //       (`lo68' format, extended (postfix) format....)
 518         // (2)   generate the output file image and symbol table;
 519         // (3)   generate relocation information from left-over fixups.
 520         ResolveAllFixups();                                             // Do all fixups
 521         StopMark();                                                             // Stop mark tape-recorder
 522
 523         if (errcnt == 0)
 524         {
 525                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 526                         cantcreat(objfname);
 527
 528                 if (verb_flag)
 529                 {
 530                         s = (prg_flag ? "executable" : "object");
 531                         printf("[Writing %s file: %s]\n", s, objfname);
 532                 }
 533
 534                 WriteObject(fd);
 535                 close(fd);
 536
 537                 if (errcnt != 0)
 538                         unlink(objfname);
 539         }
 540
 541         if (list_flag)
 542         {
 543                 if (verb_flag)
 544                         printf("[Wrapping-up listing file]\n");
 545
 546                 listing = 1;
 547                 symtable();
 548                 close(list_fd);
 549         }
 550
 551         if (err_flag)
 552                 close(err_fd);
 553
 554         DEBUG dump_everything();
 555
 556         return errcnt;
 557 }
 558
 559
 560 //
 561 // Determine processor endianess
 562 //
 563 int GetEndianess(void)
 564 {
 565         int i = 1;
 566         char * p = (char *)&i;
 567
 568         if (p[0] == 1)
 569                 return 0;
 570
 571         return 1;
 572 }
 573
 574
 575 //
 576 // Application entry point
 577 //
 578 int main(int argc, char ** argv)
 579 {
 580         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 581         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 582
 583         // Set legacy optimisation flags to on
 584         // and everything else to off
 585         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 586         optim_flags[OPT_ABS_SHORT] =
 587                 optim_flags[OPT_MOVEL_MOVEQ] =
 588                 optim_flags[OPT_BSR_BCC_S] = 1;
 589
 590         cmdlnexec = argv[0];                    // Obtain executable name
 591
 592         endian = GetEndianess();                // Get processor endianess
 593
 594         // If commands were passed in, process them
 595         if (argc > 1)
 596                 return Process(argc - 1, argv + 1);
 597
 598         DisplayVersion();
 599         DisplayHelp();
 600
 601         return 0;
 602 }
 603