Version bump for last commit + ws cleanups. Now at v2.0.18.
[rmac] / rmac.c
1 //
2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // RMAC.C - Main Application Code
4 // Copyright (C) 199x Landon Dyer, 2011-2020 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 "6502.h"
11 #include "debug.h"
12 #include "direct.h"
13 #include "dsp56k.h"
14 #include "error.h"
15 #include "expr.h"
16 #include "listing.h"
17 #include "mark.h"
18 #include "macro.h"
19 #include "object.h"
20 #include "procln.h"
21 #include "riscasm.h"
22 #include "sect.h"
23 #include "symbol.h"
24 #include "token.h"
25 #include "version.h"
26
27 int perm_verb_flag;                             // Permanently verbose, interactive mode
28 int list_flag;                                  // "-l" listing flag on command line
29 int list_pag = 1;                               // Enable listing pagination by default
30 int verb_flag;                                  // Be verbose about what's going on
31 int m6502;                                              // 1, assembling 6502 code
32 int as68_flag;                                  // as68 kludge mode
33 int glob_flag;                                  // Assume undefined symbols are global
34 int lsym_flag;                                  // Include local symbols in object file
35 int optim_warn_flag;                    // Warn about possible short branches
36 int prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
37 int prg_extend;                                 // !=0, output extended .PRG symbols
38 int legacy_flag;                                // Do stuff like insert code in RISC assembler
39 int obj_format;                                 // Object format flag
40 int debug;                                              // [1..9] Enable debugging levels
41 int err_flag;                                   // '-e' specified
42 int err_fd;                                             // File to write error messages to
43 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
44 int robjproc;                                   // Assembling Jaguar Object Processor code
45 int dsp56001;                                   // Assembling DSP 56001 code
46 int list_fd;                                    // File to write listing to
47 int regbank;                                    // RISC register bank
48 int segpadsize;                                 // Segment padding size
49 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
50 char * objfname;                                // Object filename pointer
51 char * firstfname;                              // First source filename
52 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
53 char * searchpath = NULL;               // Search path for include files
54 char defname[] = "noname.o";    // Default output filename
55 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
56 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
57 int activefpu = FPU_NONE;               // Active FPU (none by default)
58 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
59 uint32_t org68k_address;                // .org for 68k
60
61 //
62 // Convert a string to uppercase
63 //
64 void strtoupper(char * s)
65 {
66         while (*s)
67                 *s++ &= 0xDF;
68 }
69
70
71 //
72 // Manipulate file extension.
73 //
74 // 'name' must be large enough to hold any possible filename. If 'stripp' is
75 // nonzero, any old extension is removed. If the file does not already have an
76 // extension, 'extension' is appended to the filename.
77 //
78 char * fext(char * name, char * extension, int stripp)
79 {
80         char * s;
81
82         // Find beginning of "real" name (strip off path)
83         char * beg = strrchr(name, SLASHCHAR);
84
85         if (beg == NULL)
86                 beg = name;
87
88         // Clobber any old extension, if requested
89         if (stripp)
90         {
91                 for(s=beg; *s && *s!='.'; ++s)
92                         ;
93
94                 *s = '\0';
95         }
96
97         if (strrchr(beg, '.') == NULL)
98                 strcat(beg, extension);
99
100         return name;
101 }
102
103
104 //
105 // Return 'item'nth element of semicolon-seperated pathnames specified in the
106 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
107 // nth path doesn't exist.
108 //
109 // ['item' ranges from 0 to N-1, where N = #elements in search path]
110 //
111 int nthpath(char * env_var, int itemno, char * buf)
112 {
113         char * s = searchpath;
114
115         if (s == NULL)
116                 s = getenv(env_var);
117
118         if (s == NULL)
119                 return 0;
120
121         while (itemno--)
122                 while (*s != EOS && *s++ != ';')
123                         ;
124
125         if (*s == EOS)
126                 return 0;
127
128         while (*s != EOS && *s != ';')
129                 *buf++ = *s++;
130
131         *buf++ = EOS;
132
133         return 1;
134 }
135
136
137 //
138 // Display command line help
139 //
140 void DisplayHelp(void)
141 {
142         printf("Usage:\n"
143                 "    %s [options] srcfile\n"
144                 "\n"
145                 "Options:\n"
146                 "  -? or -h          Display usage information\n"
147                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
148                 "  -e[errorfile]     Send error messages to file, not stdout\n"
149                 "  -f[format]        Output object file format\n"
150                 "                    a: ALCYON\n"
151                 "                    b: BSD (use this for Jaguar)\n"
152                 "                    e: ELF\n"
153                 "                    p: P56 (use this for DSP56001 only)\n"
154                 "                    l: LOD (use this for DSP56001 only)\n"
155                 "                    x: com/exe/xex (Atari 800)\n"
156                 "                    r: absolute address\n"
157                 "  -i[path]          Directory to search for include files\n"
158                 "  -l[filename]      Create an output listing file\n"
159                 "  -l*[filename]     Create an output listing file without pagination\n"
160                 "  -m[cpu]           Select default CPU. Available options:\n"
161                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
162                 "  -n                Don't do things behind your back in RISC assembler\n"
163                 "  -o file           Output file name\n"
164                 "  +o[value]         Turn a specific optimisation on\n"
165                 "                    Available optimisation values and default settings:\n"
166                 "                    o0: Absolute long addresses to word                      (on)\n"
167                 "                    o1: move.l #x,dn/an to moveq                             (on)\n"
168                 "                    o2: Word branches to short                               (on)\n"
169                 "                    o3: Outer displacement 0(an) to (an)                     (off)\n"
170                 "                    o4: lea size(An),An to addq #size,An                     (off)\n"
171                 "                    o5: 68020+ Absolute long base/outer displacement to word (off)\n"
172                 "                    o6: Null branches to NOP                                 (off)\n"
173                 "                    o7: clr.l Dx to moveq #0,Dx                              (off)\n"
174                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy                     (off)\n"
175                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy                       (off)\n"
176                 "                    op: Enforce PC relative                                  (off)\n"
177                 "  ~o[value]         Turn a specific optimisation off\n"
178                 "  +oall             Turn all optimisations on\n"
179                 "  ~oall             Turn all optimisations off\n"
180                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
181                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
182                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
183                 "  -r[size]          Pad segments to boundary size specified\n"
184                 "                    w: word (2 bytes, default alignment)\n"
185                 "                    l: long (4 bytes)\n"
186                 "                    p: phrase (8 bytes)\n"
187                 "                    d: double phrase (16 bytes)\n"
188                 "                    q: quad phrase (32 bytes)\n"
189                 "  -s                Warn about possible short branches\n"
190                 "                    and applied optimisations\n"
191                 "  -u                Force referenced and undefined symbols global\n"
192                 "  -v                Set verbose mode\n"
193                 "  -x                Turn on debugging mode\n"
194                 "  -y[pagelen]       Set page line length (default: 61)\n"
195                 "\n", cmdlnexec);
196 }
197
198
199 //
200 // Display version information
201 //
202 void DisplayVersion(void)
203 {
204         printf("\n"
205                 " _ __ _ __ ___   __ _  ___ \n"
206                 "| '__| '_ ` _ \\ / _` |/ __|\n"
207                 "| |  | | | | | | (_| | (__ \n"
208                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
209                 "\nReboot's Macro Assembler\n"
210                 "Copyright (C) 199x Landon Dyer, 2011-2020 Reboot\n"
211                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
212 }
213
214
215 //
216 // Parse optimisation options
217 //
218 int ParseOptimization(char * optstring)
219 {
220         int onoff = 0;
221
222         while (*optstring)
223         {
224                 if (*optstring == '+')
225                         onoff = 1;
226                 else if (*optstring != '~')
227                         return ERROR;
228
229                 if ((optstring[2] == 'a' || optstring[2] == 'A')
230                         && (optstring[3] == 'l' || optstring[3] == 'L')
231                         && (optstring[4] == 'l' || optstring[4] == 'L'))
232                 {
233                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
234                         optstring += 5;
235                 }
236                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
237                 {
238                         if (optstring[2] == 'p' || optstring[2] == 'P')
239                         {
240                                 optim_flags[OPT_PC_RELATIVE] = onoff;
241                                 optstring += 3;
242                         }
243                         else
244                         {
245                                 int opt_no = atoi(&optstring[2]);
246
247                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
248                                 {
249                                         optim_flags[opt_no] = onoff;
250                                         optstring += 3;
251
252                                         // If opt_no is 2 digits then consume an extra character.
253                                         // Sounds a bit sleazy but we know we're not going to hit
254                                         // more than 100 optimisation switches so this should be
255                                         // fine. If we do hit that number then it'll probably be
256                                         // time to burn the whole codebase and start from scratch.
257                                         if (opt_no > 9)
258                                                 optstring++;
259                                 }
260                                 else
261                                         return ERROR;
262                         }
263                 }
264                 else
265                 {
266                         return ERROR;
267                 }
268
269                 if (*optstring == ',')
270                         optstring++;
271         }
272         return OK;
273 }
274
275
276 //
277 // Process command line arguments and do an assembly
278 //
279 int Process(int argc, char ** argv)
280 {
281         int argno;                                              // Argument number
282         SYM * sy;                                               // Pointer to a symbol record
283         char * s;                                               // String pointer
284         int fd;                                                 // File descriptor
285         char fnbuf[FNSIZ];                              // Filename buffer
286         int i;                                                  // Iterator
287
288         errcnt = 0;                                             // Initialize error count
289         listing = 0;                                    // Initialize listing level
290         list_flag = 0;                                  // Initialize listing flag
291         verb_flag = perm_verb_flag;             // Initialize verbose flag
292         as68_flag = 0;                                  // Initialize as68 kludge mode
293         glob_flag = 0;                                  // Initialize .globl flag
294         optim_warn_flag = 0;                    // Initialize short branch flag
295         debug = 0;                                              // Initialize debug flag
296         searchpath = NULL;                              // Initialize search path
297         objfname = NULL;                                // Initialize object filename
298         list_fname = NULL;                              // Initialize listing filename
299         err_fname = NULL;                               // Initialize error filename
300         obj_format = BSD;                               // Initialize object format
301         firstfname = NULL;                              // Initialize first filename
302         err_fd = ERROUT;                                // Initialize error file descriptor
303         err_flag = 0;                                   // Initialize error flag
304         rgpu = 0;                                               // Initialize GPU assembly flag
305         rdsp = 0;                                               // Initialize DSP assembly flag
306         robjproc = 0;                                   // Initialize OP assembly flag
307         lsym_flag = 1;                                  // Include local symbols in object file
308         regbank = BANK_N;                               // No RISC register bank specified
309         orgactive = 0;                                  // Not in RISC org section
310         orgwarning = 0;                                 // No ORG warning issued
311         segpadsize = 2;                                 // Initialize segment padding size
312     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
313     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
314         m6502 = 0;                                              // 6502 mode off by default
315
316         // Initialize modules
317         InitSymbolTable();                              // Symbol table
318         InitTokenizer();                                // Tokenizer
319         InitLineProcessor();                    // Line processor
320         InitExpression();                               // Expression analyzer
321         InitSection();                                  // Section manager / code generator
322         InitMark();                                             // Mark tape-recorder
323         InitMacro();                                    // Macro processor
324         InitListing();                                  // Listing generator
325         Init6502();                                             // 6502 assembler
326
327         // Process command line arguments and assemble source files
328         for(argno=0; argno<argc; argno++)
329         {
330                 if (*argv[argno] == '-')
331                 {
332                         switch (argv[argno][1])
333                         {
334                         case 'd':                               // Define symbol
335                         case 'D':
336                                 for(s=argv[argno]+2; *s!=EOS;)
337                                 {
338                                         if (*s++ == '=')
339                                         {
340                                                 s[-1] = EOS;
341                                                 break;
342                                         }
343                                 }
344
345                                 if (argv[argno][2] == EOS)
346                                 {
347                                         printf("-d: empty symbol\n");
348                                         errcnt++;
349                                         return errcnt;
350                                 }
351
352                                 sy = lookup(argv[argno] + 2, 0, 0);
353
354                                 if (sy == NULL)
355                                 {
356                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
357                                         sy->svalue = 0;
358                                 }
359
360                                 sy->sattr = DEFINED | EQUATED | ABS;
361                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
362                                 break;
363                         case 'e':                               // Redirect error message output
364                         case 'E':
365                                 err_fname = argv[argno] + 2;
366                                 break;
367                         case 'f':                               // -f<format>
368                         case 'F':
369                                 switch (argv[argno][2])
370                                 {
371                                 case EOS:
372                                 case 'a':                       // -fa = Alcyon [the default]
373                                 case 'A':
374                                         obj_format = ALCYON;
375                                         break;
376                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
377                                 case 'B':
378                                         obj_format = BSD;
379                                         break;
380                                 case 'e':                       // -fe = ELF
381                                 case 'E':
382                                         obj_format = ELF;
383                                         break;
384                 case 'l':           // -fl = LOD
385                 case 'L':
386                     obj_format = LOD;
387                     break;
388                 case 'p':           // -fp = P56
389                 case 'P':
390                     obj_format = P56;
391                                         break;
392                                 case 'x':                       // -fx = COM/EXE/XEX
393                                 case 'X':
394                                         obj_format = XEX;
395                                         break;
396                 case 'r':           // -fr = Absolute address
397                 case 'R':
398                     obj_format = RAW;
399                     break;
400                                 default:
401                                         printf("-f: unknown object format specified\n");
402                                         errcnt++;
403                                         return errcnt;
404                                 }
405                                 break;
406                         case 'g':                               // Debugging flag
407                         case 'G':
408                                 printf("Debugging flag (-g) not yet implemented\n");
409                                 break;
410                         case 'i':                               // Set directory search path
411                         case 'I':
412                         {
413                                 searchpath = argv[argno] + 2;
414
415                                 // Check to see if include paths actually exist
416                                 if (strlen(searchpath) > 0)
417                                 {
418                                         DIR * test = opendir(searchpath);
419
420                                         if (test == NULL)
421                                         {
422                                                 printf("Invalid include path: %s\n", searchpath);
423                                                 errcnt++;
424                                                 return errcnt;
425                                         }
426
427                                         closedir(test);
428                                 }
429
430                                 break;
431                         }
432                         case 'l':                               // Produce listing file
433                         case 'L':
434                                 if (*(argv[argno] + 2) == '*')
435                                 {
436                                         list_fname = argv[argno] + 3;
437                                         list_pag = 0;    // Special case - turn off pagination
438                                 }
439                                 else
440                                 {
441                                         list_fname = argv[argno] + 2;
442                                 }
443
444                                 listing = 1;
445                                 list_flag = 1;
446                                 lnsave++;
447                                 break;
448                         case 'm':
449                         case 'M':
450                                 if (strcmp(argv[argno] + 2, "68000") == 0)
451                                         d_68000();
452                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
453                                         d_68020();
454                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
455                                         d_68030();
456                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
457                                         d_68040();
458                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
459                                         d_68060();
460                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
461                                         d_68881();
462                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
463                                         d_68882();
464                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
465                                         d_56001();
466                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
467                                         d_6502();
468                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
469                                         d_gpu();
470                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
471                                         d_dsp();
472                                 else
473                                 {
474                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
475                                         errcnt++;
476                                         return errcnt;
477                                 }
478                                 break;
479                         case 'o':                               // Direct object file output
480                         case 'O':
481                                 if (argv[argno][2] != EOS)
482                                         objfname = argv[argno] + 2;
483                                 else
484                                 {
485                                         if (++argno >= argc)
486                                         {
487                                                 printf("Missing argument to -o");
488                                                 errcnt++;
489                                                 return errcnt;
490                                         }
491
492                                         objfname = argv[argno];
493                                 }
494
495                                 break;
496                         case 'p':               /* -p: generate ".PRG" executable output */
497                         case 'P':
498                                 /*
499                                  * -p           .PRG generation w/o symbols
500                                  * -ps          .PRG generation with symbols
501                                  * -px          .PRG generation with extended symbols
502                                  */
503                                 switch (argv[argno][2])
504                                 {
505                                         case EOS:
506                                                 prg_flag = 1;
507                                                 break;
508
509                                         case 's':
510                                         case 'S':
511                                                 prg_flag = 2;
512                                                 break;
513
514                                         case 'x':
515                                         case 'X':
516                                                 prg_flag = 3;
517                                                 break;
518
519                                         default:
520                                                 printf("-p: syntax error\n");
521                                                 errcnt++;
522                                                 return errcnt;
523                                 }
524
525                                 // Enforce Alcyon object format - kind of silly
526                                 // to ask for .prg output without it!
527                                 obj_format = ALCYON;
528                                 break;
529                         case 'r':                               // Pad seg to requested boundary size
530                         case 'R':
531                                 switch(argv[argno][2])
532                                 {
533                                 case 'w': case 'W': segpadsize = 2;  break;
534                                 case 'l': case 'L': segpadsize = 4;  break;
535                                 case 'p': case 'P': segpadsize = 8;  break;
536                                 case 'd': case 'D': segpadsize = 16; break;
537                                 case 'q': case 'Q': segpadsize = 32; break;
538                                 default: segpadsize = 2; break; // Effective autoeven();
539                                 }
540                                 break;
541                         case 's':                               // Warn about possible short branches and applied optimisations
542                         case 'S':
543                                 optim_warn_flag = 1;
544                                 break;
545                         case 'u':                               // Make undefined symbols .globl
546                         case 'U':
547                                 glob_flag = 1;
548                                 break;
549                         case 'v':                               // Verbose flag
550                         case 'V':
551                                 verb_flag++;
552
553                                 if (verb_flag > 1)
554                                         DisplayVersion();
555
556                                 break;
557                         case 'x':                               // Turn on debugging
558                         case 'X':
559                                 debug = 1;
560                                 printf("~ Debugging ON\n");
561                                 break;
562                         case 'y':                               // -y<pagelen>
563                         case 'Y':
564                                 pagelen = atoi(argv[argno] + 2);
565
566                                 if (pagelen < 10)
567                                 {
568                                         printf("-y: bad page length\n");
569                                         errcnt++;
570                                         return errcnt;
571                                 }
572
573                                 break;
574                         case EOS:                               // Input is stdin
575                                 if (firstfname == NULL) // Kludge first filename
576                                         firstfname = defname;
577
578                                 include(0, "(stdin)");
579                                 Assemble();
580                                 break;
581                         case 'h':                               // Display command line usage
582                         case 'H':
583                         case '?':
584                                 DisplayVersion();
585                                 DisplayHelp();
586                                 errcnt++;
587                                 break;
588                         case 'n':                               // Turn off legacy mode
589                         case 'N':
590                                 legacy_flag = 0;
591                                 printf("Legacy mode OFF\n");
592                                 break;
593                         default:
594                                 DisplayVersion();
595                                 printf("Unknown switch: %s\n\n", argv[argno]);
596                                 DisplayHelp();
597                                 errcnt++;
598                                 break;
599                         }
600                 }
601                 else if (*argv[argno] == '+' || *argv[argno] == '~')
602                 {
603                         if (ParseOptimization(argv[argno]) != OK)
604                         {
605                                 DisplayVersion();
606                                 printf("Unknown switch: %s\n\n", argv[argno]);
607                                 DisplayHelp();
608                                 errcnt++;
609                                 break;
610                         }
611                 }
612                 else
613                 {
614                         // Record first filename.
615                         if (firstfname == NULL)
616                                 firstfname = argv[argno];
617
618                         strcpy(fnbuf, argv[argno]);
619                         fext(fnbuf, ".s", 0);
620                         fd = open(fnbuf, 0);
621
622                         if (fd < 0)
623                         {
624                                 printf("Cannot open: %s\n", fnbuf);
625                                 errcnt++;
626                                 continue;
627                         }
628
629                         include(fd, fnbuf);
630                         Assemble();
631                 }
632         }
633
634         // Wind-up processing;
635         // o  save current section (no more code generation)
636         // o  do auto-even of all sections (or boundary alignment as requested
637         //    through '-r')
638     // o  save the last pc value for 6502 (if we used 6502 at all) and
639     //    detemine if the last section contains anything
640         // o  determine name of object file:
641         //    -  "foo.o" for linkable output;
642         //    -  "foo.prg" for GEMDOS executable (-p flag).
643         SaveSection();
644         int temp_section = cursect;
645
646         for(i=TEXT; i<=BSS; i<<=1)
647         {
648                 SwitchSection(i);
649
650                 switch(segpadsize)
651                 {
652                 case 2:  d_even();    break;
653                 case 4:  d_long();    break;
654                 case 8:  d_phrase();  break;
655                 case 16: d_dphrase(); break;
656                 case 32: d_qphrase(); break;
657                 }
658
659                 SaveSection();
660         }
661
662         SwitchSection(M6502);
663
664         if (sloc != currentorg[0])
665         {
666                 currentorg[1] = sloc;
667                 currentorg += 2;
668         }
669
670         // This looks like an awful kludge...  !!! FIX !!!
671         if (temp_section & (M56001P | M56001X | M56001Y))
672         {
673                 SwitchSection(temp_section);
674
675                 if (chptr != dsp_currentorg->start)
676                 {
677                         dsp_currentorg->end = chptr;
678                         dsp_currentorg++;
679                 }
680         }
681
682         SwitchSection(TEXT);
683
684         if (objfname == NULL)
685         {
686                 if (firstfname == NULL)
687                         firstfname = defname;
688
689                 strcpy(fnbuf, firstfname);
690                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
691                 objfname = fnbuf;
692         }
693
694         // With one pass finished, go back and:
695         // (1)   run through all the fixups and resolve forward references;
696         // (1.5) ensure that remaining fixups can be handled by the linker
697         //       (`lo68' format, extended (postfix) format....)
698         // (2)   generate the output file image and symbol table;
699         // (3)   generate relocation information from left-over fixups.
700         ResolveAllFixups();                                             // Do all fixups
701         StopMark();                                                             // Stop mark tape-recorder
702
703         if (errcnt == 0)
704         {
705                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
706                         CantCreateFile(objfname);
707
708                 if (verb_flag)
709                 {
710                         s = (prg_flag ? "executable" : "object");
711                         printf("[Writing %s file: %s]\n", s, objfname);
712                 }
713
714                 WriteObject(fd);
715                 close(fd);
716
717                 if (errcnt != 0)
718                         unlink(objfname);
719         }
720
721         if (list_flag)
722         {
723                 if (verb_flag)
724                         printf("[Wrapping-up listing file]\n");
725
726                 listing = 1;
727                 symtable();
728                 close(list_fd);
729         }
730
731         if (err_flag)
732                 close(err_fd);
733
734         DEBUG dump_everything();
735
736         return errcnt;
737 }
738
739
740 //
741 // Determine processor endianess
742 //
743 int GetEndianess(void)
744 {
745         int i = 1;
746         char * p = (char *)&i;
747
748         if (p[0] == 1)
749                 return 0;
750
751         return 1;
752 }
753
754
755 //
756 // Application entry point
757 //
758 int main(int argc, char ** argv)
759 {
760         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
761         legacy_flag = 1;                                // Default is legacy mode on (:-P)
762
763         // Set legacy optimisation flags to on and everything else to off
764         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
765         optim_flags[OPT_ABS_SHORT] =
766                 optim_flags[OPT_MOVEL_MOVEQ] =
767                 optim_flags[OPT_BSR_BCC_S] = 1;
768
769         cmdlnexec = argv[0];                    // Obtain executable name
770         endian = GetEndianess();                // Get processor endianess
771
772         // If commands were passed in, process them
773         if (argc > 1)
774                 return Process(argc - 1, argv + 1);
775
776         DisplayVersion();
777         DisplayHelp();
778
779         return 0;
780 }
781