nasm.c

   1 /* The Netwide Assembler main program module
   2  *
   3  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
   4  * Julian Hall. All rights reserved. The software is
   5  * redistributable under the license given in the file "LICENSE"
   6  * distributed in the NASM archive.
   7  */
   8
   9 #include "compiler.h"
  10
  11 #include <stdio.h>
  12 #include <stdarg.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <ctype.h>
  16 #include <inttypes.h>
  17 #include <limits.h>
  18 #include <time.h>
  19
  20 #include "nasm.h"
  21 #include "nasmlib.h"
  22 #include "saa.h"
  23 #include "raa.h"
  24 #include "float.h"
  25 #include "stdscan.h"
  26 #include "insns.h"
  27 #include "preproc.h"
  28 #include "parser.h"
  29 #include "eval.h"
  30 #include "assemble.h"
  31 #include "labels.h"
  32 #include "outform.h"
  33 #include "listing.h"
  34
  35 struct forwrefinfo {            /* info held on forward refs. */
  36     int lineno;
  37     int operand;
  38 };
  39
  40 static int get_bits(char *value);
  41 static uint32_t get_cpu(char *cpu_str);
  42 static void parse_cmdline(int, char **);
  43 static void assemble_file(char *, StrList **);
  44 static void register_output_formats(void);
  45 static void report_error_gnu(int severity, const char *fmt, ...);
  46 static void report_error_vc(int severity, const char *fmt, ...);
  47 static void report_error_common(int severity, const char *fmt,
  48                                 va_list args);
  49 static bool is_suppressed_warning(int severity);
  50 static void usage(void);
  51 static efunc report_error;
  52
  53 static int using_debug_info, opt_verbose_info;
  54 bool tasm_compatible_mode = false;
  55 int pass0, passn;
  56 int maxbits = 0;
  57 int globalrel = 0;
  58
  59 time_t official_compile_time;
  60
  61 static char inname[FILENAME_MAX];
  62 static char outname[FILENAME_MAX];
  63 static char listname[FILENAME_MAX];
  64 static char errname[FILENAME_MAX];
  65 static int globallineno;        /* for forward-reference tracking */
  66 /* static int pass = 0; */
  67 static struct ofmt *ofmt = NULL;
  68
  69 static FILE *error_file;        /* Where to write error messages */
  70
  71 static FILE *ofile = NULL;
  72 int optimizing = -1;            /* number of optimization passes to take */
  73 static int sb, cmd_sb = 16;     /* by default */
  74 static uint32_t cmd_cpu = IF_PLEVEL;       /* highest level by default */
  75 static uint32_t cpu = IF_PLEVEL;   /* passed to insn_size & assemble.c */
  76 int64_t global_offset_changed;      /* referenced in labels.c */
  77 int64_t prev_offset_changed;
  78 int32_t stall_count;
  79
  80 static struct location location;
  81 int in_abs_seg;                 /* Flag we are in ABSOLUTE seg */
  82 int32_t abs_seg;                   /* ABSOLUTE segment basis */
  83 int32_t abs_offset;                /* ABSOLUTE offset */
  84
  85 static struct RAA *offsets;
  86
  87 static struct SAA *forwrefs;    /* keep track of forward references */
  88 static const struct forwrefinfo *forwref;
  89
  90 static Preproc *preproc;
  91 enum op_type {
  92     op_normal,                  /* Preprocess and assemble */
  93     op_preprocess,              /* Preprocess only */
  94     op_depend,                  /* Generate dependencies */
  95 };
  96 static enum op_type operating_mode;
  97 /* Dependency flags */
  98 static bool depend_emit_phony = false;
  99 static bool depend_missing_ok = false;
 100 static const char *depend_target = NULL;
 101 static const char *depend_file = NULL;
 102
 103 /*
 104  * Which of the suppressible warnings are suppressed. Entry zero
 105  * isn't an actual warning, but it used for -w+error/-Werror.
 106  */
 107
 108 static bool warning_on[ERR_WARN_MAX+1]; /* Current state */
 109 static bool warning_on_global[ERR_WARN_MAX+1]; /* Command-line state */
 110
 111 static const struct warning {
 112     const char *name;
 113     const char *help;
 114     bool enabled;
 115 } warnings[ERR_WARN_MAX+1] = {
 116     {"error", "treat warnings as errors", false},
 117     {"macro-params", "macro calls with wrong parameter count", true},
 118     {"macro-selfref", "cyclic macro references", false},
 119     {"macro-defaults", "macros with more default than optional parameters", true},
 120     {"orphan-labels", "labels alone on lines without trailing `:'", true},
 121     {"number-overflow", "numeric constant does not fit", true},
 122     {"gnu-elf-extensions", "using 8- or 16-bit relocation in ELF32, a GNU extension", false},
 123     {"float-overflow", "floating point overflow", true},
 124     {"float-denorm", "floating point denormal", false},
 125     {"float-underflow", "floating point underflow", false},
 126     {"float-toolong", "too many digits in floating-point number", true},
 127     {"user", "%warning directives", true},
 128 };
 129
 130 /*
 131  * This is a null preprocessor which just copies lines from input
 132  * to output. It's used when someone explicitly requests that NASM
 133  * not preprocess their source file.
 134  */
 135
 136 static void no_pp_reset(char *, int, efunc, evalfunc, ListGen *, StrList **);
 137 static char *no_pp_getline(void);
 138 static void no_pp_cleanup(int);
 139 static Preproc no_pp = {
 140     no_pp_reset,
 141     no_pp_getline,
 142     no_pp_cleanup
 143 };
 144
 145 /*
 146  * get/set current offset...
 147  */
 148 #define GET_CURR_OFFS (in_abs_seg?abs_offset:\
 149                       raa_read(offsets,location.segment))
 150 #define SET_CURR_OFFS(x) (in_abs_seg?(void)(abs_offset=(x)):\
 151                          (void)(offsets=raa_write(offsets,location.segment,(x))))
 152
 153 static int want_usage;
 154 static int terminate_after_phase;
 155 int user_nolist = 0;            /* fbk 9/2/00 */
 156
 157 static void nasm_fputs(const char *line, FILE * outfile)
 158 {
 159     if (outfile) {
 160         fputs(line, outfile);
 161         putc('\n', outfile);
 162     } else
 163         puts(line);
 164 }
 165
 166 /* Convert a struct tm to a POSIX-style time constant */
 167 static int64_t posix_mktime(struct tm *tm)
 168 {
 169     int64_t t;
 170     int64_t y = tm->tm_year;
 171
 172     /* See IEEE 1003.1:2004, section 4.14 */
 173
 174     t = (y-70)*365 + (y-69)/4 - (y-1)/100 + (y+299)/400;
 175     t += tm->tm_yday;
 176     t *= 24;
 177     t += tm->tm_hour;
 178     t *= 60;
 179     t += tm->tm_min;
 180     t *= 60;
 181     t += tm->tm_sec;
 182
 183     return t;
 184 }
 185
 186 static void define_macros_early(void)
 187 {
 188     char temp[128];
 189     struct tm lt, *lt_p, gm, *gm_p;
 190     int64_t posix_time;
 191
 192     lt_p = localtime(&official_compile_time);
 193     if (lt_p) {
 194         lt = *lt_p;
 195
 196         strftime(temp, sizeof temp, "__DATE__=\"%Y-%m-%d\"", &lt);
 197         pp_pre_define(temp);
 198         strftime(temp, sizeof temp, "__DATE_NUM__=%Y%m%d", &lt);
 199         pp_pre_define(temp);
 200         strftime(temp, sizeof temp, "__TIME__=\"%H:%M:%S\"", &lt);
 201         pp_pre_define(temp);
 202         strftime(temp, sizeof temp, "__TIME_NUM__=%H%M%S", &lt);
 203         pp_pre_define(temp);
 204     }
 205
 206     gm_p = gmtime(&official_compile_time);
 207     if (gm_p) {
 208         gm = *gm_p;
 209
 210         strftime(temp, sizeof temp, "__UTC_DATE__=\"%Y-%m-%d\"", &gm);
 211         pp_pre_define(temp);
 212         strftime(temp, sizeof temp, "__UTC_DATE_NUM__=%Y%m%d", &gm);
 213         pp_pre_define(temp);
 214         strftime(temp, sizeof temp, "__UTC_TIME__=\"%H:%M:%S\"", &gm);
 215         pp_pre_define(temp);
 216         strftime(temp, sizeof temp, "__UTC_TIME_NUM__=%H%M%S", &gm);
 217         pp_pre_define(temp);
 218     }
 219
 220     if (gm_p)
 221         posix_time = posix_mktime(&gm);
 222     else if (lt_p)
 223         posix_time = posix_mktime(&lt);
 224     else
 225         posix_time = 0;
 226
 227     if (posix_time) {
 228         snprintf(temp, sizeof temp, "__POSIX_TIME__=%"PRId64, posix_time);
 229         pp_pre_define(temp);
 230     }
 231 }
 232
 233 static void define_macros_late(void)
 234 {
 235     char temp[128];
 236
 237     snprintf(temp, sizeof(temp), "__OUTPUT_FORMAT__=%s\n",
 238              ofmt->shortname);
 239     pp_pre_define(temp);
 240 }
 241
 242 static void emit_dependencies(StrList *list)
 243 {
 244     FILE *deps;
 245     int linepos, len;
 246     StrList *l, *nl;
 247
 248     if (depend_file && strcmp(depend_file, "-")) {
 249         deps = fopen(depend_file, "w");
 250         if (!deps) {
 251             report_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
 252                          "unable to write dependency file `%s'", depend_file);
 253             return;
 254         }
 255     } else {
 256         deps = stdout;
 257     }
 258
 259     linepos = fprintf(deps, "%s:", depend_target);
 260     for (l = list; l; l = l->next) {
 261         len = strlen(l->str);
 262         if (linepos + len > 62) {
 263             fprintf(deps, " \\\n ");
 264             linepos = 1;
 265         }
 266         fprintf(deps, " %s", l->str);
 267         linepos += len+1;
 268     }
 269     fprintf(deps, "\n\n");
 270
 271     for (l = list; l; l = nl) {
 272         if (depend_emit_phony)
 273             fprintf(deps, "%s:\n\n", l->str);
 274
 275         nl = l->next;
 276         nasm_free(l);
 277     }
 278
 279     if (deps != stdout)
 280         fclose(deps);
 281 }
 282
 283 int main(int argc, char **argv)
 284 {
 285     StrList *depend_list = NULL, **depend_ptr;
 286
 287     time(&official_compile_time);
 288
 289     pass0 = 0;
 290     want_usage = terminate_after_phase = false;
 291     report_error = report_error_gnu;
 292
 293     error_file = stderr;
 294
 295     tolower_init();
 296
 297     nasm_set_malloc_error(report_error);
 298     offsets = raa_init();
 299     forwrefs = saa_init((int32_t)sizeof(struct forwrefinfo));
 300
 301     preproc = &nasmpp;
 302     operating_mode = op_normal;
 303
 304     seg_init();
 305
 306     register_output_formats();
 307
 308     /* Define some macros dependent on the runtime, but not
 309        on the command line. */
 310     define_macros_early();
 311
 312     parse_cmdline(argc, argv);
 313
 314     if (terminate_after_phase) {
 315         if (want_usage)
 316             usage();
 317         return 1;
 318     }
 319
 320     /* If debugging info is disabled, suppress any debug calls */
 321     if (!using_debug_info)
 322         ofmt->current_dfmt = &null_debug_form;
 323
 324     if (ofmt->stdmac)
 325         pp_extra_stdmac(ofmt->stdmac);
 326     parser_global_info(ofmt, &location);
 327     eval_global_info(ofmt, lookup_label, &location);
 328
 329     /* define some macros dependent of command-line */
 330     define_macros_late();
 331
 332     depend_ptr = (depend_file || (operating_mode == op_depend))
 333         ? &depend_list : NULL;
 334     if (!depend_target)
 335         depend_target = outname;
 336
 337     switch (operating_mode) {
 338     case op_depend:
 339         {
 340             char *line;
 341
 342             if (depend_missing_ok)
 343                 pp_include_path(NULL);  /* "assume generated" */
 344
 345             preproc->reset(inname, 0, report_error, evaluate, &nasmlist,
 346                            depend_ptr);
 347             if (outname[0] == '\0')
 348                 ofmt->filename(inname, outname, report_error);
 349             ofile = NULL;
 350             while ((line = preproc->getline()))
 351                 nasm_free(line);
 352             preproc->cleanup(0);
 353         }
 354         break;
 355
 356     case op_preprocess:
 357         {
 358             char *line;
 359             char *file_name = NULL;
 360             int32_t prior_linnum = 0;
 361             int lineinc = 0;
 362
 363             if (*outname) {
 364                 ofile = fopen(outname, "w");
 365                 if (!ofile)
 366                     report_error(ERR_FATAL | ERR_NOFILE,
 367                                  "unable to open output file `%s'",
 368                                  outname);
 369             } else
 370                 ofile = NULL;
 371
 372             location.known = false;
 373
 374             /* pass = 1; */
 375             preproc->reset(inname, 3, report_error, evaluate, &nasmlist,
 376                            depend_ptr);
 377
 378             while ((line = preproc->getline())) {
 379                 /*
 380                  * We generate %line directives if needed for later programs
 381                  */
 382                 int32_t linnum = prior_linnum += lineinc;
 383                 int altline = src_get(&linnum, &file_name);
 384                 if (altline) {
 385                     if (altline == 1 && lineinc == 1)
 386                         nasm_fputs("", ofile);
 387                     else {
 388                         lineinc = (altline != -1 || lineinc != 1);
 389                         fprintf(ofile ? ofile : stdout,
 390                                 "%%line %"PRId32"+%d %s\n", linnum, lineinc,
 391                                 file_name);
 392                     }
 393                     prior_linnum = linnum;
 394                 }
 395                 nasm_fputs(line, ofile);
 396                 nasm_free(line);
 397             }
 398             nasm_free(file_name);
 399             preproc->cleanup(0);
 400             if (ofile)
 401                 fclose(ofile);
 402             if (ofile && terminate_after_phase)
 403                 remove(outname);
 404         }
 405         break;
 406
 407     case op_normal:
 408         {
 409             /*
 410              * We must call ofmt->filename _anyway_, even if the user
 411              * has specified their own output file, because some
 412              * formats (eg OBJ and COFF) use ofmt->filename to find out
 413              * the name of the input file and then put that inside the
 414              * file.
 415              */
 416             ofmt->filename(inname, outname, report_error);
 417
 418             ofile = fopen(outname, "wb");
 419             if (!ofile) {
 420                 report_error(ERR_FATAL | ERR_NOFILE,
 421                              "unable to open output file `%s'", outname);
 422             }
 423
 424             /*
 425              * We must call init_labels() before ofmt->init() since
 426              * some object formats will want to define labels in their
 427              * init routines. (eg OS/2 defines the FLAT group)
 428              */
 429             init_labels();
 430
 431             ofmt->init(ofile, report_error, define_label, evaluate);
 432
 433             assemble_file(inname, depend_ptr);
 434
 435             if (!terminate_after_phase) {
 436                 ofmt->cleanup(using_debug_info);
 437                 cleanup_labels();
 438             } else {
 439                 /*
 440                  * Despite earlier comments, we need this fclose.
 441                  * The object output drivers only fclose on cleanup,
 442                  * and we just skipped that.
 443                  */
 444                 fclose (ofile);
 445
 446                 remove(outname);
 447                 if (listname[0])
 448                     remove(listname);
 449             }
 450         }
 451         break;
 452     }
 453
 454     if (depend_list)
 455         emit_dependencies(depend_list);
 456
 457     if (want_usage)
 458         usage();
 459
 460     raa_free(offsets);
 461     saa_free(forwrefs);
 462     eval_cleanup();
 463     stdscan_cleanup();
 464
 465     if (terminate_after_phase)
 466         return 1;
 467     else
 468         return 0;
 469 }
 470
 471 /*
 472  * Get a parameter for a command line option.
 473  * First arg must be in the form of e.g. -f...
 474  */
 475 static char *get_param(char *p, char *q, bool *advance)
 476 {
 477     *advance = false;
 478     if (p[2]) {                 /* the parameter's in the option */
 479         p += 2;
 480         while (nasm_isspace(*p))
 481             p++;
 482         return p;
 483     }
 484     if (q && q[0]) {
 485         *advance = true;
 486         return q;
 487     }
 488     report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 489                  "option `-%c' requires an argument", p[1]);
 490     return NULL;
 491 }
 492
 493 /*
 494  * Copy a filename
 495  */
 496 static void copy_filename(char *dst, const char *src)
 497 {
 498     size_t len = strlen(src);
 499
 500     if (len >= (size_t)FILENAME_MAX) {
 501         report_error(ERR_FATAL | ERR_NOFILE, "file name too long");
 502         return;
 503     }
 504     strncpy(dst, src, FILENAME_MAX);
 505 }
 506
 507 /*
 508  * Convert a string to Make-safe form
 509  */
 510 static char *quote_for_make(const char *str)
 511 {
 512     const char *p;
 513     char *os, *q;
 514
 515     size_t n = 1;               /* Terminating zero */
 516     size_t nbs = 0;
 517
 518     if (!str)
 519         return NULL;
 520
 521     for (p = str; *p; p++) {
 522         switch (*p) {
 523         case ' ':
 524         case '\t':
 525             /* Convert N backslashes + ws -> 2N+1 backslashes + ws */
 526             n += nbs + 2;
 527             nbs = 0;
 528             break;
 529         case '$':
 530         case '#':
 531             nbs = 0;
 532             n += 2;
 533             break;
 534         case '\\':
 535             nbs++;
 536             n++;
 537             break;
 538         default:
 539             nbs = 0;
 540             n++;
 541         break;
 542         }
 543     }
 544
 545     /* Convert N backslashes at the end of filename to 2N backslashes */
 546     if (nbs)
 547         n += nbs;
 548
 549     os = q = nasm_malloc(n);
 550
 551     nbs = 0;
 552     for (p = str; *p; p++) {
 553         switch (*p) {
 554         case ' ':
 555         case '\t':
 556             while (nbs--)
 557                 *q++ = '\\';
 558             *q++ = '\\';
 559             *q++ = *p;
 560             break;
 561         case '$':
 562             *q++ = *p;
 563             *q++ = *p;
 564             nbs = 0;
 565             break;
 566         case '#':
 567             *q++ = '\\';
 568             *q++ = *p;
 569             nbs = 0;
 570             break;
 571         case '\\':
 572             *q++ = *p;
 573             nbs++;
 574             break;
 575         default:
 576             *q++ = *p;
 577             nbs = 0;
 578         break;
 579         }
 580     }
 581     while (nbs--)
 582         *q++ = '\\';
 583
 584     *q = '\0';
 585
 586     return os;
 587 }
 588
 589 struct textargs {
 590     const char *label;
 591     int value;
 592 };
 593
 594 #define OPT_PREFIX 0
 595 #define OPT_POSTFIX 1
 596 struct textargs textopts[] = {
 597     {"prefix", OPT_PREFIX},
 598     {"postfix", OPT_POSTFIX},
 599     {NULL, 0}
 600 };
 601
 602 static bool stopoptions = false;
 603 static bool process_arg(char *p, char *q)
 604 {
 605     char *param;
 606     int i;
 607     bool advance = false;
 608     bool do_warn;
 609
 610     if (!p || !p[0])
 611         return false;
 612
 613     if (p[0] == '-' && !stopoptions) {
 614         if (strchr("oOfpPdDiIlFXuUZwW", p[1])) {
 615             /* These parameters take values */
 616             if (!(param = get_param(p, q, &advance)))
 617                 return advance;
 618         }
 619
 620         switch (p[1]) {
 621         case 's':
 622             error_file = stdout;
 623             break;
 624
 625         case 'o':               /* output file */
 626             copy_filename(outname, param);
 627             break;
 628
 629         case 'f':               /* output format */
 630             ofmt = ofmt_find(param);
 631             if (!ofmt) {
 632                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 633                              "unrecognised output format `%s' - "
 634                              "use -hf for a list", param);
 635             }
 636             break;
 637
 638         case 'O':               /* Optimization level */
 639         {
 640             int opt;
 641
 642             if (!*param) {
 643                 /* Naked -O == -Ox */
 644                 optimizing = INT_MAX >> 1; /* Almost unlimited */
 645             } else {
 646                 while (*param) {
 647                     switch (*param) {
 648                     case '0': case '1': case '2': case '3': case '4':
 649                     case '5': case '6': case '7': case '8': case '9':
 650                         opt = strtoul(param, &param, 10);
 651
 652                         /* -O0 -> optimizing == -1, 0.98 behaviour */
 653                         /* -O1 -> optimizing == 0, 0.98.09 behaviour */
 654                         if (opt < 2)
 655                             optimizing = opt - 1;
 656                         else
 657                             optimizing = opt;
 658                         break;
 659
 660                     case 'v':
 661                     case '+':
 662                         param++;
 663                         opt_verbose_info = true;
 664                         break;
 665
 666                     case 'x':
 667                         param++;
 668                         optimizing = INT_MAX >> 1; /* Almost unlimited */
 669                         break;
 670
 671                     default:
 672                         report_error(ERR_FATAL,
 673                                      "unknown optimization option -O%c\n",
 674                                      *param);
 675                         break;
 676                     }
 677                 }
 678             }
 679             break;
 680         }
 681
 682         case 'p':                       /* pre-include */
 683         case 'P':
 684             pp_pre_include(param);
 685             break;
 686
 687         case 'd':                       /* pre-define */
 688         case 'D':
 689             pp_pre_define(param);
 690             break;
 691
 692         case 'u':                       /* un-define */
 693         case 'U':
 694             pp_pre_undefine(param);
 695             break;
 696
 697         case 'i':                       /* include search path */
 698         case 'I':
 699             pp_include_path(param);
 700             break;
 701
 702         case 'l':                       /* listing file */
 703             copy_filename(listname, param);
 704             break;
 705
 706         case 'Z':                       /* error messages file */
 707             strcpy(errname, param);
 708             break;
 709
 710         case 'F':                       /* specify debug format */
 711             ofmt->current_dfmt = dfmt_find(ofmt, param);
 712             if (!ofmt->current_dfmt) {
 713                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 714                              "unrecognized debug format `%s' for"
 715                              " output format `%s'",
 716                              param, ofmt->shortname);
 717             }
 718             using_debug_info = true;
 719             break;
 720
 721         case 'X':               /* specify error reporting format */
 722             if (nasm_stricmp("vc", param) == 0)
 723                 report_error = report_error_vc;
 724             else if (nasm_stricmp("gnu", param) == 0)
 725                 report_error = report_error_gnu;
 726             else
 727                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 728                              "unrecognized error reporting format `%s'",
 729                              param);
 730             break;
 731
 732         case 'g':
 733             using_debug_info = true;
 734             break;
 735
 736         case 'h':
 737             printf
 738                 ("usage: nasm [-@ response file] [-o outfile] [-f format] "
 739                  "[-l listfile]\n"
 740                  "            [options...] [--] filename\n"
 741                  "    or nasm -v   for version info\n\n"
 742                  "    -t          assemble in SciTech TASM compatible mode\n"
 743                  "    -g          generate debug information in selected format.\n");
 744             printf
 745                 ("    -E (or -e)  preprocess only (writes output to stdout by default)\n"
 746                  "    -a          don't preprocess (assemble only)\n"
 747                  "    -M          generate Makefile dependencies on stdout\n"
 748                  "    -MG         d:o, missing files assumed generated\n\n"
 749                  "    -Z<file>    redirect error messages to file\n"
 750                  "    -s          redirect error messages to stdout\n\n"
 751                  "    -F format   select a debugging format\n\n"
 752                  "    -I<path>    adds a pathname to the include file path\n");
 753             printf
 754                 ("    -O<digit>   optimize branch offsets (-O0 disables, default)\n"
 755                  "    -P<file>    pre-includes a file\n"
 756                  "    -D<macro>[=<value>] pre-defines a macro\n"
 757                  "    -U<macro>   undefines a macro\n"
 758                  "    -X<format>  specifies error reporting format (gnu or vc)\n"
 759                  "    -w+foo      enables warning foo (equiv. -Wfoo)\n"
 760                  "    -w-foo      disable warning foo (equiv. -Wno-foo)\n"
 761                  "Warnings:\n");
 762             for (i = 0; i <= ERR_WARN_MAX; i++)
 763                 printf("    %-23s %s (default %s)\n",
 764                        warnings[i].name, warnings[i].help,
 765                        warnings[i].enabled ? "on" : "off");
 766             printf
 767                 ("\nresponse files should contain command line parameters"
 768                  ", one per line.\n");
 769             if (p[2] == 'f') {
 770                 printf("\nvalid output formats for -f are"
 771                        " (`*' denotes default):\n");
 772                 ofmt_list(ofmt, stdout);
 773             } else {
 774                 printf("\nFor a list of valid output formats, use -hf.\n");
 775                 printf("For a list of debug formats, use -f <form> -y.\n");
 776             }
 777             exit(0);            /* never need usage message here */
 778             break;
 779
 780         case 'y':
 781             printf("\nvalid debug formats for '%s' output format are"
 782                    " ('*' denotes default):\n", ofmt->shortname);
 783             dfmt_list(ofmt, stdout);
 784             exit(0);
 785             break;
 786
 787         case 't':
 788             tasm_compatible_mode = true;
 789             break;
 790
 791         case 'v':
 792             printf("NASM version %s compiled on %s%s\n",
 793                    nasm_version, nasm_date, nasm_compile_options);
 794             exit(0);        /* never need usage message here */
 795             break;
 796
 797         case 'e':              /* preprocess only */
 798         case 'E':
 799             operating_mode = op_preprocess;
 800             break;
 801
 802         case 'a':              /* assemble only - don't preprocess */
 803             preproc = &no_pp;
 804             break;
 805
 806         case 'W':
 807             if (param[0] == 'n' && param[1] == 'o' && param[2] == '-') {
 808                 do_warn = false;
 809                 param += 3;
 810             } else {
 811                 do_warn = true;
 812             }
 813             goto set_warning;
 814
 815         case 'w':
 816             if (param[0] != '+' && param[0] != '-') {
 817                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 818                              "invalid option to `-w'");
 819                 break;
 820             }
 821             do_warn = (param[0] == '+');
 822             param++;
 823             goto set_warning;
 824         set_warning:
 825             for (i = 0; i <= ERR_WARN_MAX; i++)
 826                 if (!nasm_stricmp(param, warnings[i].name))
 827                     break;
 828             if (i <= ERR_WARN_MAX)
 829                 warning_on_global[i] = do_warn;
 830             else if (!nasm_stricmp(param, "all"))
 831                 for (i = 1; i <= ERR_WARN_MAX; i++)
 832                     warning_on_global[i] = do_warn;
 833             else if (!nasm_stricmp(param, "none"))
 834                 for (i = 1; i <= ERR_WARN_MAX; i++)
 835                     warning_on_global[i] = !do_warn;
 836             else
 837                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 838                              "invalid warning `%s'", param);
 839             break;
 840
 841         case 'M':
 842             switch (p[2]) {
 843             case 0:
 844                 operating_mode = op_depend;
 845                 break;
 846             case 'G':
 847                 operating_mode = op_depend;
 848                 depend_missing_ok = true;
 849                 break;
 850             case 'P':
 851                 depend_emit_phony = true;
 852                 break;
 853             case 'D':
 854                 depend_file = q;
 855                 advance = true;
 856                 break;
 857             case 'T':
 858                 depend_target = q;
 859                 advance = true;
 860                 break;
 861             case 'Q':
 862                 depend_target = quote_for_make(q);
 863                 advance = true;
 864                 break;
 865             default:
 866                 report_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
 867                              "unknown dependency option `-M%c'", p[2]);
 868                 break;
 869             }
 870             if (advance && (!q || !q[0])) {
 871                 report_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
 872                              "option `-M%c' requires a parameter", p[2]);
 873                 break;
 874             }
 875             break;
 876
 877         case '-':
 878             {
 879                 int s;
 880
 881                 if (p[2] == 0) {        /* -- => stop processing options */
 882                     stopoptions = 1;
 883                     break;
 884                 }
 885                 for (s = 0; textopts[s].label; s++) {
 886                     if (!nasm_stricmp(p + 2, textopts[s].label)) {
 887                         break;
 888                     }
 889                 }
 890
 891                 switch (s) {
 892
 893                 case OPT_PREFIX:
 894                 case OPT_POSTFIX:
 895                     {
 896                         if (!q) {
 897                             report_error(ERR_NONFATAL | ERR_NOFILE |
 898                                          ERR_USAGE,
 899                                          "option `--%s' requires an argument",
 900                                          p + 2);
 901                             break;
 902                         } else {
 903                             advance = 1, param = q;
 904                         }
 905
 906                         if (s == OPT_PREFIX) {
 907                             strncpy(lprefix, param, PREFIX_MAX - 1);
 908                             lprefix[PREFIX_MAX - 1] = 0;
 909                             break;
 910                         }
 911                         if (s == OPT_POSTFIX) {
 912                             strncpy(lpostfix, param, POSTFIX_MAX - 1);
 913                             lpostfix[POSTFIX_MAX - 1] = 0;
 914                             break;
 915                         }
 916                         break;
 917                     }
 918                 default:
 919                     {
 920                         report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 921                                      "unrecognised option `--%s'", p + 2);
 922                         break;
 923                     }
 924                 }
 925                 break;
 926             }
 927
 928         default:
 929             if (!ofmt->setinfo(GI_SWITCH, &p))
 930                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 931                              "unrecognised option `-%c'", p[1]);
 932             break;
 933         }
 934     } else {
 935         if (*inname) {
 936             report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 937                          "more than one input file specified");
 938         } else {
 939             copy_filename(inname, p);
 940         }
 941     }
 942
 943     return advance;
 944 }
 945
 946 #define ARG_BUF_DELTA 128
 947
 948 static void process_respfile(FILE * rfile)
 949 {
 950     char *buffer, *p, *q, *prevarg;
 951     int bufsize, prevargsize;
 952
 953     bufsize = prevargsize = ARG_BUF_DELTA;
 954     buffer = nasm_malloc(ARG_BUF_DELTA);
 955     prevarg = nasm_malloc(ARG_BUF_DELTA);
 956     prevarg[0] = '\0';
 957
 958     while (1) {                 /* Loop to handle all lines in file */
 959         p = buffer;
 960         while (1) {             /* Loop to handle long lines */
 961             q = fgets(p, bufsize - (p - buffer), rfile);
 962             if (!q)
 963                 break;
 964             p += strlen(p);
 965             if (p > buffer && p[-1] == '\n')
 966                 break;
 967             if (p - buffer > bufsize - 10) {
 968                 int offset;
 969                 offset = p - buffer;
 970                 bufsize += ARG_BUF_DELTA;
 971                 buffer = nasm_realloc(buffer, bufsize);
 972                 p = buffer + offset;
 973             }
 974         }
 975
 976         if (!q && p == buffer) {
 977             if (prevarg[0])
 978                 process_arg(prevarg, NULL);
 979             nasm_free(buffer);
 980             nasm_free(prevarg);
 981             return;
 982         }
 983
 984         /*
 985          * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
 986          * them are present at the end of the line.
 987          */
 988         *(p = &buffer[strcspn(buffer, "\r\n\032")]) = '\0';
 989
 990         while (p > buffer && nasm_isspace(p[-1]))
 991             *--p = '\0';
 992
 993         p = buffer;
 994         while (nasm_isspace(*p))
 995             p++;
 996
 997         if (process_arg(prevarg, p))
 998             *p = '\0';
 999
1000         if ((int) strlen(p) > prevargsize - 10) {
1001             prevargsize += ARG_BUF_DELTA;
1002             prevarg = nasm_realloc(prevarg, prevargsize);
1003         }
1004         strncpy(prevarg, p, prevargsize);
1005     }
1006 }
1007
1008 /* Function to process args from a string of args, rather than the
1009  * argv array. Used by the environment variable and response file
1010  * processing.
1011  */
1012 static void process_args(char *args)
1013 {
1014     char *p, *q, *arg, *prevarg;
1015     char separator = ' ';
1016
1017     p = args;
1018     if (*p && *p != '-')
1019         separator = *p++;
1020     arg = NULL;
1021     while (*p) {
1022         q = p;
1023         while (*p && *p != separator)
1024             p++;
1025         while (*p == separator)
1026             *p++ = '\0';
1027         prevarg = arg;
1028         arg = q;
1029         if (process_arg(prevarg, arg))
1030             arg = NULL;
1031     }
1032     if (arg)
1033         process_arg(arg, NULL);
1034 }
1035
1036 static void process_response_file(const char *file)
1037 {
1038     char str[2048];
1039     FILE *f = fopen(file, "r");
1040     if (!f) {
1041         perror(file);
1042         exit(-1);
1043     }
1044     while (fgets(str, sizeof str, f)) {
1045         process_args(str);
1046     }
1047     fclose(f);
1048 }
1049
1050 static void parse_cmdline(int argc, char **argv)
1051 {
1052     FILE *rfile;
1053     char *envreal, *envcopy = NULL, *p, *arg;
1054     int i;
1055
1056     *inname = *outname = *listname = *errname = '\0';
1057     for (i = 0; i <= ERR_WARN_MAX; i++)
1058         warning_on_global[i] = warnings[i].enabled;
1059
1060     /*
1061      * First, process the NASMENV environment variable.
1062      */
1063     envreal = getenv("NASMENV");
1064     arg = NULL;
1065     if (envreal) {
1066         envcopy = nasm_strdup(envreal);
1067         process_args(envcopy);
1068         nasm_free(envcopy);
1069     }
1070
1071     /*
1072      * Now process the actual command line.
1073      */
1074     while (--argc) {
1075         bool advance;
1076         argv++;
1077         if (argv[0][0] == '@') {
1078             /* We have a response file, so process this as a set of
1079              * arguments like the environment variable. This allows us
1080              * to have multiple arguments on a single line, which is
1081              * different to the -@resp file processing below for regular
1082              * NASM.
1083              */
1084             process_response_file(argv[0]+1);
1085             argc--;
1086             argv++;
1087         }
1088         if (!stopoptions && argv[0][0] == '-' && argv[0][1] == '@') {
1089             p = get_param(argv[0], argc > 1 ? argv[1] : NULL, &advance);
1090             if (p) {
1091                 rfile = fopen(p, "r");
1092                 if (rfile) {
1093                     process_respfile(rfile);
1094                     fclose(rfile);
1095                 } else
1096                     report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
1097                                  "unable to open response file `%s'", p);
1098             }
1099         } else
1100             advance = process_arg(argv[0], argc > 1 ? argv[1] : NULL);
1101         argv += advance, argc -= advance;
1102     }
1103
1104     /* Look for basic command line typos.  This definitely doesn't
1105        catch all errors, but it might help cases of fumbled fingers. */
1106     if (!*inname)
1107         report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
1108                      "no input file specified");
1109     else if (!strcmp(inname, errname) ||
1110              !strcmp(inname, outname) ||
1111              !strcmp(inname, listname) ||
1112              (depend_file && !strcmp(inname, depend_file)))
1113         report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
1114                      "file `%s' is both input and output file",
1115                      inname);
1116
1117     if (*errname) {
1118         error_file = fopen(errname, "w");
1119         if (!error_file) {
1120             error_file = stderr;        /* Revert to default! */
1121             report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
1122                          "cannot open file `%s' for error messages",
1123                          errname);
1124         }
1125     }
1126 }
1127
1128 /* List of directives */
1129 enum directives {
1130     D_NONE, D_ABSOLUTE, D_BITS, D_COMMON, D_CPU, D_DEBUG, D_DEFAULT,
1131     D_EXTERN, D_FLOAT, D_GLOBAL, D_LIST, D_SECTION, D_SEGMENT, D_WARNING
1132 };
1133 static const char *directives[] = {
1134     "", "absolute", "bits", "common", "cpu", "debug", "default",
1135     "extern", "float", "global", "list", "section", "segment", "warning"
1136 };
1137 static enum directives getkw(char **directive, char **value);
1138
1139 static void assemble_file(char *fname, StrList **depend_ptr)
1140 {
1141     char *directive, *value, *p, *q, *special, *line, debugid[80];
1142     insn output_ins;
1143     int i, validid;
1144     bool rn_error;
1145     int32_t seg;
1146     int64_t offs;
1147     struct tokenval tokval;
1148     expr *e;
1149     int pass_max;
1150
1151     if (cmd_sb == 32 && cmd_cpu < IF_386)
1152         report_error(ERR_FATAL, "command line: "
1153                      "32-bit segment size requires a higher cpu");
1154
1155     pass_max = prev_offset_changed = (INT_MAX >> 1) + 2; /* Almost unlimited */
1156     for (passn = 1; pass0 <= 2; passn++) {
1157         int pass1, pass2;
1158         ldfunc def_label;
1159
1160         pass1 = pass0 == 2 ? 2 : 1;     /* 1, 1, 1, ..., 1, 2 */
1161         pass2 = passn > 1  ? 2 : 1;     /* 1, 2, 2, ..., 2, 2 */
1162         /* pass0                           0, 0, 0, ..., 1, 2 */
1163
1164         def_label = passn > 1 ? redefine_label : define_label;
1165
1166         globalbits = sb = cmd_sb;   /* set 'bits' to command line default */
1167         cpu = cmd_cpu;
1168         if (pass0 == 2) {
1169             if (*listname)
1170                 nasmlist.init(listname, report_error);
1171         }
1172         in_abs_seg = false;
1173         global_offset_changed = 0;  /* set by redefine_label */
1174         location.segment = ofmt->section(NULL, pass2, &sb);
1175         globalbits = sb;
1176         if (passn > 1) {
1177             saa_rewind(forwrefs);
1178             forwref = saa_rstruct(forwrefs);
1179             raa_free(offsets);
1180             offsets = raa_init();
1181         }
1182         preproc->reset(fname, pass1, report_error, evaluate, &nasmlist,
1183                        pass1 == 2 ? depend_ptr : NULL);
1184         memcpy(warning_on, warning_on_global, (ERR_WARN_MAX+1) * sizeof(bool));
1185
1186         globallineno = 0;
1187         if (passn == 1)
1188             location.known = true;
1189         location.offset = offs = GET_CURR_OFFS;
1190
1191         while ((line = preproc->getline())) {
1192             enum directives d;
1193             globallineno++;
1194
1195             /* here we parse our directives; this is not handled by the 'real'
1196              * parser. */
1197             directive = line;
1198             d = getkw(&directive, &value);
1199             if (d) {
1200                 int err = 0;
1201
1202                 switch (d) {
1203                 case D_SEGMENT:         /* [SEGMENT n] */
1204                 case D_SECTION:
1205                     seg = ofmt->section(value, pass2, &sb);
1206                     if (seg == NO_SEG) {
1207                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1208                                      "segment name `%s' not recognized",
1209                                      value);
1210                     } else {
1211                         in_abs_seg = false;
1212                         location.segment = seg;
1213                     }
1214                     break;
1215                 case D_EXTERN:          /* [EXTERN label:special] */
1216                     if (*value == '$')
1217                         value++;        /* skip initial $ if present */
1218                     if (pass0 == 2) {
1219                         q = value;
1220                         while (*q && *q != ':')
1221                             q++;
1222                         if (*q == ':') {
1223                             *q++ = '\0';
1224                             ofmt->symdef(value, 0L, 0L, 3, q);
1225                         }
1226                     } else if (passn == 1) {
1227                         q = value;
1228                         validid = true;
1229                         if (!isidstart(*q))
1230                             validid = false;
1231                         while (*q && *q != ':') {
1232                             if (!isidchar(*q))
1233                                 validid = false;
1234                             q++;
1235                         }
1236                         if (!validid) {
1237                             report_error(ERR_NONFATAL,
1238                                          "identifier expected after EXTERN");
1239                             break;
1240                         }
1241                         if (*q == ':') {
1242                             *q++ = '\0';
1243                             special = q;
1244                         } else
1245                             special = NULL;
1246                         if (!is_extern(value)) {        /* allow re-EXTERN to be ignored */
1247                             int temp = pass0;
1248                             pass0 = 1;  /* fake pass 1 in labels.c */
1249                             declare_as_global(value, special,
1250                                               report_error);
1251                             define_label(value, seg_alloc(), 0L, NULL,
1252                                          false, true, ofmt, report_error);
1253                             pass0 = temp;
1254                         }
1255                     }           /* else  pass0 == 1 */
1256                     break;
1257                 case D_BITS:            /* [BITS bits] */
1258                     globalbits = sb = get_bits(value);
1259                     break;
1260                 case D_GLOBAL:          /* [GLOBAL symbol:special] */
1261                     if (*value == '$')
1262                         value++;        /* skip initial $ if present */
1263                     if (pass0 == 2) {   /* pass 2 */
1264                         q = value;
1265                         while (*q && *q != ':')
1266                             q++;
1267                         if (*q == ':') {
1268                             *q++ = '\0';
1269                             ofmt->symdef(value, 0L, 0L, 3, q);
1270                         }
1271                     } else if (pass2 == 1) {    /* pass == 1 */
1272                         q = value;
1273                         validid = true;
1274                         if (!isidstart(*q))
1275                             validid = false;
1276                         while (*q && *q != ':') {
1277                             if (!isidchar(*q))
1278                                 validid = false;
1279                             q++;
1280                         }
1281                         if (!validid) {
1282                             report_error(ERR_NONFATAL,
1283                                          "identifier expected after GLOBAL");
1284                             break;
1285                         }
1286                         if (*q == ':') {
1287                             *q++ = '\0';
1288                             special = q;
1289                         } else
1290                             special = NULL;
1291                         declare_as_global(value, special, report_error);
1292                     }           /* pass == 1 */
1293                     break;
1294                 case D_COMMON:          /* [COMMON symbol size:special] */
1295                     if (*value == '$')
1296                         value++;        /* skip initial $ if present */
1297                     if (pass0 == 1) {
1298                         p = value;
1299                         validid = true;
1300                         if (!isidstart(*p))
1301                             validid = false;
1302                         while (*p && !nasm_isspace(*p)) {
1303                             if (!isidchar(*p))
1304                                 validid = false;
1305                             p++;
1306                         }
1307                         if (!validid) {
1308                             report_error(ERR_NONFATAL,
1309                                          "identifier expected after COMMON");
1310                             break;
1311                         }
1312                         if (*p) {
1313                             int64_t size;
1314
1315                             while (*p && nasm_isspace(*p))
1316                                 *p++ = '\0';
1317                             q = p;
1318                             while (*q && *q != ':')
1319                                 q++;
1320                             if (*q == ':') {
1321                                 *q++ = '\0';
1322                                 special = q;
1323                             } else
1324                                 special = NULL;
1325                             size = readnum(p, &rn_error);
1326                             if (rn_error)
1327                                 report_error(ERR_NONFATAL,
1328                                              "invalid size specified"
1329                                              " in COMMON declaration");
1330                             else
1331                                 define_common(value, seg_alloc(), size,
1332                                               special, ofmt, report_error);
1333                         } else
1334                             report_error(ERR_NONFATAL,
1335                                          "no size specified in"
1336                                          " COMMON declaration");
1337                     } else if (pass0 == 2) {    /* pass == 2 */
1338                         q = value;
1339                         while (*q && *q != ':') {
1340                             if (nasm_isspace(*q))
1341                                 *q = '\0';
1342                             q++;
1343                         }
1344                         if (*q == ':') {
1345                             *q++ = '\0';
1346                             ofmt->symdef(value, 0L, 0L, 3, q);
1347                         }
1348                     }
1349                     break;
1350                 case D_ABSOLUTE:                /* [ABSOLUTE address] */
1351                     stdscan_reset();
1352                     stdscan_bufptr = value;
1353                     tokval.t_type = TOKEN_INVALID;
1354                     e = evaluate(stdscan, NULL, &tokval, NULL, pass2,
1355                                  report_error, NULL);
1356                     if (e) {
1357                         if (!is_reloc(e))
1358                             report_error(pass0 ==
1359                                          1 ? ERR_NONFATAL : ERR_PANIC,
1360                                          "cannot use non-relocatable expression as "
1361                                          "ABSOLUTE address");
1362                         else {
1363                             abs_seg = reloc_seg(e);
1364                             abs_offset = reloc_value(e);
1365                         }
1366                     } else if (passn == 1)
1367                         abs_offset = 0x100;     /* don't go near zero in case of / */
1368                     else
1369                         report_error(ERR_PANIC, "invalid ABSOLUTE address "
1370                                      "in pass two");
1371                     in_abs_seg = true;
1372                     location.segment = NO_SEG;
1373                     break;
1374                 case D_DEBUG:           /* [DEBUG] */
1375                     p = value;
1376                     q = debugid;
1377                     validid = true;
1378                     if (!isidstart(*p))
1379                         validid = false;
1380                     while (*p && !nasm_isspace(*p)) {
1381                         if (!isidchar(*p))
1382                             validid = false;
1383                         *q++ = *p++;
1384                     }
1385                     *q++ = 0;
1386                     if (!validid) {
1387                         report_error(passn == 1 ? ERR_NONFATAL : ERR_PANIC,
1388                                      "identifier expected after DEBUG");
1389                         break;
1390                     }
1391                     while (*p && nasm_isspace(*p))
1392                         p++;
1393                     if (pass0 == 2)
1394                         ofmt->current_dfmt->debug_directive(debugid, p);
1395                     break;
1396                 case D_WARNING:         /* [WARNING {+|-|*}warn-name] */
1397                     while (*value && nasm_isspace(*value))
1398                         value++;
1399
1400                     switch(*value) {
1401                     case '-': validid = 0; value++; break;
1402                     case '+': validid = 1; value++; break;
1403                     case '*': validid = 2; value++; break;
1404                     default:  validid = 1; break;
1405                     }
1406
1407                     for (i = 1; i <= ERR_WARN_MAX; i++)
1408                         if (!nasm_stricmp(value, warnings[i].name))
1409                             break;
1410                     if (i <= ERR_WARN_MAX) {
1411                         switch(validid) {
1412                         case 0:
1413                             warning_on[i] = false;
1414                             break;
1415                         case 1:
1416                             warning_on[i] = true;
1417                             break;
1418                         case 2:
1419                             warning_on[i] = warning_on_global[i];
1420                             break;
1421                         }
1422                     }
1423                     else
1424                         report_error(ERR_NONFATAL,
1425                                      "invalid warning id in WARNING directive");
1426                     break;
1427                 case D_CPU:             /* [CPU] */
1428                     cpu = get_cpu(value);
1429                     break;
1430                 case D_LIST:            /* [LIST {+|-}] */
1431                     while (*value && nasm_isspace(*value))
1432                         value++;
1433
1434                     if (*value == '+') {
1435                         user_nolist = 0;
1436                     } else {
1437                         if (*value == '-') {
1438                             user_nolist = 1;
1439                         } else {
1440                             err = 1;
1441                         }
1442                     }
1443                     break;
1444                 case D_DEFAULT:         /* [DEFAULT] */
1445                     stdscan_reset();
1446                     stdscan_bufptr = value;
1447                     tokval.t_type = TOKEN_INVALID;
1448                     if (stdscan(NULL, &tokval) == TOKEN_SPECIAL) {
1449                         switch ((int)tokval.t_integer) {
1450                         case S_REL:
1451                             globalrel = 1;
1452                             break;
1453                         case S_ABS:
1454                             globalrel = 0;
1455                             break;
1456                         default:
1457                             err = 1;
1458                             break;
1459                         }
1460                     } else {
1461                         err = 1;
1462                     }
1463                     break;
1464                 case D_FLOAT:
1465                     if (float_option(value)) {
1466                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1467                                      "unknown 'float' directive: %s",
1468                                      value);
1469                     }
1470                     break;
1471                 default:
1472                     if (!ofmt->directive(directive, value, pass2))
1473                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1474                                      "unrecognised directive [%s]",
1475                                      directive);
1476                 }
1477                 if (err) {
1478                     report_error(ERR_NONFATAL,
1479                                  "invalid parameter to [%s] directive",
1480                                  directive);
1481                 }
1482             } else {            /* it isn't a directive */
1483
1484                 parse_line(pass1, line, &output_ins,
1485                            report_error, evaluate, def_label);
1486
1487                 if (optimizing > 0) {
1488                     if (forwref != NULL && globallineno == forwref->lineno) {
1489                         output_ins.forw_ref = true;
1490                         do {
1491                             output_ins.oprs[forwref->operand].opflags |=
1492                                 OPFLAG_FORWARD;
1493                             forwref = saa_rstruct(forwrefs);
1494                         } while (forwref != NULL
1495                                  && forwref->lineno == globallineno);
1496                     } else
1497                         output_ins.forw_ref = false;
1498                 }
1499
1500                 if (optimizing > 0) {
1501                     if (passn == 1) {
1502                         for (i = 0; i < output_ins.operands; i++) {
1503                             if (output_ins.oprs[i].
1504                                 opflags & OPFLAG_FORWARD) {
1505                                 struct forwrefinfo *fwinf =
1506                                     (struct forwrefinfo *)
1507                                     saa_wstruct(forwrefs);
1508                                 fwinf->lineno = globallineno;
1509                                 fwinf->operand = i;
1510                             }
1511                         }
1512                     }
1513                 }
1514
1515                 /*  forw_ref */
1516                 if (output_ins.opcode == I_EQU) {
1517                     if (pass1 == 1) {
1518                         /*
1519                          * Special `..' EQUs get processed in pass two,
1520                          * except `..@' macro-processor EQUs which are done
1521                          * in the normal place.
1522                          */
1523                         if (!output_ins.label)
1524                             report_error(ERR_NONFATAL,
1525                                          "EQU not preceded by label");
1526
1527                         else if (output_ins.label[0] != '.' ||
1528                                  output_ins.label[1] != '.' ||
1529                                  output_ins.label[2] == '@') {
1530                             if (output_ins.operands == 1 &&
1531                                 (output_ins.oprs[0].type & IMMEDIATE) &&
1532                                 output_ins.oprs[0].wrt == NO_SEG) {
1533                                 int isext =
1534                                     output_ins.oprs[0].
1535                                     opflags & OPFLAG_EXTERN;
1536                                 def_label(output_ins.label,
1537                                           output_ins.oprs[0].segment,
1538                                           output_ins.oprs[0].offset, NULL,
1539                                           false, isext, ofmt,
1540                                           report_error);
1541                             } else if (output_ins.operands == 2
1542                                        && (output_ins.oprs[0].
1543                                            type & IMMEDIATE)
1544                                        && (output_ins.oprs[0].type & COLON)
1545                                        && output_ins.oprs[0].segment ==
1546                                        NO_SEG
1547                                        && output_ins.oprs[0].wrt == NO_SEG
1548                                        && (output_ins.oprs[1].
1549                                            type & IMMEDIATE)
1550                                        && output_ins.oprs[1].segment ==
1551                                        NO_SEG
1552                                        && output_ins.oprs[1].wrt ==
1553                                        NO_SEG) {
1554                                 def_label(output_ins.label,
1555                                           output_ins.oprs[0].
1556                                           offset | SEG_ABS,
1557                                           output_ins.oprs[1].offset, NULL,
1558                                           false, false, ofmt,
1559                                           report_error);
1560                             } else
1561                                 report_error(ERR_NONFATAL,
1562                                              "bad syntax for EQU");
1563                         }
1564                     } else {
1565                         /*
1566                          * Special `..' EQUs get processed here, except
1567                          * `..@' macro processor EQUs which are done above.
1568                          */
1569                         if (output_ins.label[0] == '.' &&
1570                             output_ins.label[1] == '.' &&
1571                             output_ins.label[2] != '@') {
1572                             if (output_ins.operands == 1 &&
1573                                 (output_ins.oprs[0].type & IMMEDIATE)) {
1574                                 define_label(output_ins.label,
1575                                              output_ins.oprs[0].segment,
1576                                              output_ins.oprs[0].offset,
1577                                              NULL, false, false, ofmt,
1578                                              report_error);
1579                             } else if (output_ins.operands == 2
1580                                        && (output_ins.oprs[0].
1581                                            type & IMMEDIATE)
1582                                        && (output_ins.oprs[0].type & COLON)
1583                                        && output_ins.oprs[0].segment ==
1584                                        NO_SEG
1585                                        && (output_ins.oprs[1].
1586                                            type & IMMEDIATE)
1587                                        && output_ins.oprs[1].segment ==
1588                                        NO_SEG) {
1589                                 define_label(output_ins.label,
1590                                              output_ins.oprs[0].
1591                                              offset | SEG_ABS,
1592                                              output_ins.oprs[1].offset,
1593                                              NULL, false, false, ofmt,
1594                                              report_error);
1595                             } else
1596                                 report_error(ERR_NONFATAL,
1597                                              "bad syntax for EQU");
1598                         }
1599                     }
1600                 } else {        /* instruction isn't an EQU */
1601
1602                     if (pass1 == 1) {
1603
1604                         int64_t l = insn_size(location.segment, offs, sb, cpu,
1605                                            &output_ins, report_error);
1606
1607                         /* if (using_debug_info)  && output_ins.opcode != -1) */
1608                         if (using_debug_info)
1609                         {       /* fbk 03/25/01 */
1610                             /* this is done here so we can do debug type info */
1611                             int32_t typeinfo =
1612                                 TYS_ELEMENTS(output_ins.operands);
1613                             switch (output_ins.opcode) {
1614                             case I_RESB:
1615                                 typeinfo =
1616                                     TYS_ELEMENTS(output_ins.oprs[0].
1617                                                  offset) | TY_BYTE;
1618                                 break;
1619                             case I_RESW:
1620                                 typeinfo =
1621                                     TYS_ELEMENTS(output_ins.oprs[0].
1622                                                  offset) | TY_WORD;
1623                                 break;
1624                             case I_RESD:
1625                                 typeinfo =
1626                                     TYS_ELEMENTS(output_ins.oprs[0].
1627                                                  offset) | TY_DWORD;
1628                                 break;
1629                             case I_RESQ:
1630                                 typeinfo =
1631                                     TYS_ELEMENTS(output_ins.oprs[0].
1632                                                  offset) | TY_QWORD;
1633                                 break;
1634                             case I_REST:
1635                                 typeinfo =
1636                                     TYS_ELEMENTS(output_ins.oprs[0].
1637                                                  offset) | TY_TBYTE;
1638                                 break;
1639                             case I_RESO:
1640                                 typeinfo =
1641                                     TYS_ELEMENTS(output_ins.oprs[0].
1642                                                  offset) | TY_OWORD;
1643                                 break;
1644                             case I_RESY:
1645                                 typeinfo =
1646                                     TYS_ELEMENTS(output_ins.oprs[0].
1647                                                  offset) | TY_YWORD;
1648                                 break;
1649                             case I_DB:
1650                                 typeinfo |= TY_BYTE;
1651                                 break;
1652                             case I_DW:
1653                                 typeinfo |= TY_WORD;
1654                                 break;
1655                             case I_DD:
1656                                 if (output_ins.eops_float)
1657                                     typeinfo |= TY_FLOAT;
1658                                 else
1659                                     typeinfo |= TY_DWORD;
1660                                 break;
1661                             case I_DQ:
1662                                 typeinfo |= TY_QWORD;
1663                                 break;
1664                             case I_DT:
1665                                 typeinfo |= TY_TBYTE;
1666                                 break;
1667                             case I_DO:
1668                                 typeinfo |= TY_OWORD;
1669                                 break;
1670                             case I_DY:
1671                                 typeinfo |= TY_YWORD;
1672                                 break;
1673                             default:
1674                                 typeinfo = TY_LABEL;
1675
1676                             }
1677
1678                             ofmt->current_dfmt->debug_typevalue(typeinfo);
1679
1680                         }
1681                         if (l != -1) {
1682                             offs += l;
1683                             SET_CURR_OFFS(offs);
1684                         }
1685                         /*
1686                          * else l == -1 => invalid instruction, which will be
1687                          * flagged as an error on pass 2
1688                          */
1689
1690                     } else {
1691                         offs += assemble(location.segment, offs, sb, cpu,
1692                                          &output_ins, ofmt, report_error,
1693                                          &nasmlist);
1694                         SET_CURR_OFFS(offs);
1695
1696                     }
1697                 }               /* not an EQU */
1698                 cleanup_insn(&output_ins);
1699             }
1700             nasm_free(line);
1701             location.offset = offs = GET_CURR_OFFS;
1702         }                       /* end while (line = preproc->getline... */
1703         if (pass1 == 2 && global_offset_changed)
1704             report_error(ERR_NONFATAL,
1705                          "phase error detected at end of assembly.");
1706
1707         if (pass1 == 1)
1708             preproc->cleanup(1);
1709
1710         if (pass1 == 1 && terminate_after_phase) {
1711             fclose(ofile);
1712             remove(outname);
1713             if (want_usage)
1714                 usage();
1715             exit(1);
1716         }
1717
1718         if ((passn > 1 && !global_offset_changed) || pass0 == 2)
1719             pass0++;
1720         else if (global_offset_changed && global_offset_changed < prev_offset_changed) {
1721             prev_offset_changed = global_offset_changed;
1722             stall_count = 0;
1723             }
1724         else stall_count++;
1725
1726         if((stall_count > 997) || (passn >= pass_max))
1727             /* We get here if the labels don't converge
1728              * Example: FOO equ FOO + 1
1729              */
1730              report_error(ERR_NONFATAL,
1731                           "Can't find valid values for all labels "
1732                           "after %d passes, giving up.\n"
1733                           "                  Possible cause: recursive equ's.", passn);
1734     }
1735
1736     preproc->cleanup(0);
1737     nasmlist.cleanup();
1738     if (opt_verbose_info)     /*  -On and -Ov switches */
1739         fprintf(stdout,
1740                 "info:: assembly required 1+%d+1 passes\n", passn-3);
1741 }                               /* exit from assemble_file (...) */
1742
1743 static enum directives getkw(char **directive, char **value)
1744 {
1745     char *p, *q, *buf;
1746
1747     buf = *directive;
1748
1749     /*  allow leading spaces or tabs */
1750     while (*buf == ' ' || *buf == '\t')
1751         buf++;
1752
1753     if (*buf != '[')
1754         return 0;
1755
1756     p = buf;
1757
1758     while (*p && *p != ']')
1759         p++;
1760
1761     if (!*p)
1762         return 0;
1763
1764     q = p++;
1765
1766     while (*p && *p != ';') {
1767         if (!nasm_isspace(*p))
1768             return 0;
1769         p++;
1770     }
1771     q[1] = '\0';
1772
1773     *directive = p = buf + 1;
1774     while (*buf && *buf != ' ' && *buf != ']' && *buf != '\t')
1775         buf++;
1776     if (*buf == ']') {
1777         *buf = '\0';
1778         *value = buf;
1779     } else {
1780         *buf++ = '\0';
1781         while (nasm_isspace(*buf))
1782             buf++;              /* beppu - skip leading whitespace */
1783         *value = buf;
1784         while (*buf != ']')
1785             buf++;
1786         *buf++ = '\0';
1787     }
1788
1789     return bsii(*directive, directives, elements(directives));
1790 }
1791
1792 /**
1793  * gnu style error reporting
1794  * This function prints an error message to error_file in the
1795  * style used by GNU. An example would be:
1796  * file.asm:50: error: blah blah blah
1797  * where file.asm is the name of the file, 50 is the line number on
1798  * which the error occurs (or is detected) and "error:" is one of
1799  * the possible optional diagnostics -- it can be "error" or "warning"
1800  * or something else.  Finally the line terminates with the actual
1801  * error message.
1802  *
1803  * @param severity the severity of the warning or error
1804  * @param fmt the printf style format string
1805  */
1806 static void report_error_gnu(int severity, const char *fmt, ...)
1807 {
1808     va_list ap;
1809
1810     if (is_suppressed_warning(severity))
1811         return;
1812
1813     if (severity & ERR_NOFILE)
1814         fputs("nasm: ", error_file);
1815     else {
1816         char *currentfile = NULL;
1817         int32_t lineno = 0;
1818         src_get(&lineno, &currentfile);
1819         fprintf(error_file, "%s:%"PRId32": ", currentfile, lineno);
1820         nasm_free(currentfile);
1821     }
1822     va_start(ap, fmt);
1823     report_error_common(severity, fmt, ap);
1824     va_end(ap);
1825 }
1826
1827 /**
1828  * MS style error reporting
1829  * This function prints an error message to error_file in the
1830  * style used by Visual C and some other Microsoft tools. An example
1831  * would be:
1832  * file.asm(50) : error: blah blah blah
1833  * where file.asm is the name of the file, 50 is the line number on
1834  * which the error occurs (or is detected) and "error:" is one of
1835  * the possible optional diagnostics -- it can be "error" or "warning"
1836  * or something else.  Finally the line terminates with the actual
1837  * error message.
1838  *
1839  * @param severity the severity of the warning or error
1840  * @param fmt the printf style format string
1841  */
1842 static void report_error_vc(int severity, const char *fmt, ...)
1843 {
1844     va_list ap;
1845
1846     if (is_suppressed_warning(severity))
1847         return;
1848
1849     if (severity & ERR_NOFILE)
1850         fputs("nasm: ", error_file);
1851     else {
1852         char *currentfile = NULL;
1853         int32_t lineno = 0;
1854         src_get(&lineno, &currentfile);
1855         fprintf(error_file, "%s(%"PRId32") : ", currentfile, lineno);
1856         nasm_free(currentfile);
1857     }
1858     va_start(ap, fmt);
1859     report_error_common(severity, fmt, ap);
1860     va_end(ap);
1861 }
1862
1863 /**
1864  * check for supressed warning
1865  * checks for suppressed warning or pass one only warning and we're
1866  * not in pass 1
1867  *
1868  * @param severity the severity of the warning or error
1869  * @return true if we should abort error/warning printing
1870  */
1871 static bool is_suppressed_warning(int severity)
1872 {
1873     /*
1874      * See if it's a suppressed warning.
1875      */
1876     return (severity & ERR_MASK) == ERR_WARNING &&
1877         (((severity & ERR_WARN_MASK) != 0 &&
1878           !warning_on[(severity & ERR_WARN_MASK) >> ERR_WARN_SHR]) ||
1879          /* See if it's a pass-one only warning and we're not in pass one. */
1880          ((severity & ERR_PASS1) && pass0 != 1) ||
1881          ((severity & ERR_PASS2) && pass0 != 2));
1882 }
1883
1884 /**
1885  * common error reporting
1886  * This is the common back end of the error reporting schemes currently
1887  * implemented.  It prints the nature of the warning and then the
1888  * specific error message to error_file and may or may not return.  It
1889  * doesn't return if the error severity is a "panic" or "debug" type.
1890  *
1891  * @param severity the severity of the warning or error
1892  * @param fmt the printf style format string
1893  */
1894 static void report_error_common(int severity, const char *fmt,
1895                                 va_list args)
1896 {
1897     switch (severity & (ERR_MASK|ERR_NO_SEVERITY)) {
1898     case ERR_WARNING:
1899         fputs("warning: ", error_file);
1900         break;
1901     case ERR_NONFATAL:
1902         fputs("error: ", error_file);
1903         break;
1904     case ERR_FATAL:
1905         fputs("fatal: ", error_file);
1906         break;
1907     case ERR_PANIC:
1908         fputs("panic: ", error_file);
1909         break;
1910     case ERR_DEBUG:
1911         fputs("debug: ", error_file);
1912         break;
1913     default:
1914         break;
1915     }
1916
1917     vfprintf(error_file, fmt, args);
1918     putc('\n', error_file);
1919
1920     if (severity & ERR_USAGE)
1921         want_usage = true;
1922
1923     switch (severity & ERR_MASK) {
1924     case ERR_DEBUG:
1925         /* no further action, by definition */
1926         break;
1927     case ERR_WARNING:
1928         if (warning_on[0])      /* Treat warnings as errors */
1929             terminate_after_phase = true;
1930         break;
1931     case ERR_NONFATAL:
1932         terminate_after_phase = true;
1933         break;
1934     case ERR_FATAL:
1935         if (ofile) {
1936             fclose(ofile);
1937             remove(outname);
1938         }
1939         if (want_usage)
1940             usage();
1941         exit(1);                /* instantly die */
1942         break;                  /* placate silly compilers */
1943     case ERR_PANIC:
1944         fflush(NULL);
1945         /*      abort();        *//* halt, catch fire, and dump core */
1946         exit(3);
1947         break;
1948     }
1949 }
1950
1951 static void usage(void)
1952 {
1953     fputs("type `nasm -h' for help\n", error_file);
1954 }
1955
1956 static void register_output_formats(void)
1957 {
1958     ofmt = ofmt_register(report_error);
1959 }
1960
1961 #define BUF_DELTA 512
1962
1963 static FILE *no_pp_fp;
1964 static efunc no_pp_err;
1965 static ListGen *no_pp_list;
1966 static int32_t no_pp_lineinc;
1967
1968 static void no_pp_reset(char *file, int pass, efunc error, evalfunc eval,
1969                         ListGen * listgen, StrList **deplist)
1970 {
1971     src_set_fname(nasm_strdup(file));
1972     src_set_linnum(0);
1973     no_pp_lineinc = 1;
1974     no_pp_err = error;
1975     no_pp_fp = fopen(file, "r");
1976     if (!no_pp_fp)
1977         no_pp_err(ERR_FATAL | ERR_NOFILE,
1978                   "unable to open input file `%s'", file);
1979     no_pp_list = listgen;
1980     (void)pass;                 /* placate compilers */
1981     (void)eval;                 /* placate compilers */
1982
1983     if (deplist) {
1984         StrList *sl = nasm_malloc(strlen(file)+1+sizeof sl->next);
1985         sl->next = NULL;
1986         strcpy(sl->str, file);
1987         *deplist = sl;
1988     }
1989 }
1990
1991 static char *no_pp_getline(void)
1992 {
1993     char *buffer, *p, *q;
1994     int bufsize;
1995
1996     bufsize = BUF_DELTA;
1997     buffer = nasm_malloc(BUF_DELTA);
1998     src_set_linnum(src_get_linnum() + no_pp_lineinc);
1999
2000     while (1) {                 /* Loop to handle %line */
2001
2002         p = buffer;
2003         while (1) {             /* Loop to handle long lines */
2004             q = fgets(p, bufsize - (p - buffer), no_pp_fp);
2005             if (!q)
2006                 break;
2007             p += strlen(p);
2008             if (p > buffer && p[-1] == '\n')
2009                 break;
2010             if (p - buffer > bufsize - 10) {
2011                 int offset;
2012                 offset = p - buffer;
2013                 bufsize += BUF_DELTA;
2014                 buffer = nasm_realloc(buffer, bufsize);
2015                 p = buffer + offset;
2016             }
2017         }
2018
2019         if (!q && p == buffer) {
2020             nasm_free(buffer);
2021             return NULL;
2022         }
2023
2024         /*
2025          * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
2026          * them are present at the end of the line.
2027          */
2028         buffer[strcspn(buffer, "\r\n\032")] = '\0';
2029
2030         if (!nasm_strnicmp(buffer, "%line", 5)) {
2031             int32_t ln;
2032             int li;
2033             char *nm = nasm_malloc(strlen(buffer));
2034             if (sscanf(buffer + 5, "%"PRId32"+%d %s", &ln, &li, nm) == 3) {
2035                 nasm_free(src_set_fname(nm));
2036                 src_set_linnum(ln);
2037                 no_pp_lineinc = li;
2038                 continue;
2039             }
2040             nasm_free(nm);
2041         }
2042         break;
2043     }
2044
2045     no_pp_list->line(LIST_READ, buffer);
2046
2047     return buffer;
2048 }
2049
2050 static void no_pp_cleanup(int pass)
2051 {
2052     (void)pass;                     /* placate GCC */
2053     fclose(no_pp_fp);
2054 }
2055
2056 static uint32_t get_cpu(char *value)
2057 {
2058     if (!strcmp(value, "8086"))
2059         return IF_8086;
2060     if (!strcmp(value, "186"))
2061         return IF_186;
2062     if (!strcmp(value, "286"))
2063         return IF_286;
2064     if (!strcmp(value, "386"))
2065         return IF_386;
2066     if (!strcmp(value, "486"))
2067         return IF_486;
2068     if (!strcmp(value, "586") || !nasm_stricmp(value, "pentium"))
2069         return IF_PENT;
2070     if (!strcmp(value, "686") ||
2071         !nasm_stricmp(value, "ppro") ||
2072         !nasm_stricmp(value, "pentiumpro") || !nasm_stricmp(value, "p2"))
2073         return IF_P6;
2074     if (!nasm_stricmp(value, "p3") || !nasm_stricmp(value, "katmai"))
2075         return IF_KATMAI;
2076     if (!nasm_stricmp(value, "p4") ||   /* is this right? -- jrc */
2077         !nasm_stricmp(value, "willamette"))
2078         return IF_WILLAMETTE;
2079     if (!nasm_stricmp(value, "prescott"))
2080         return IF_PRESCOTT;
2081     if (!nasm_stricmp(value, "x64") ||
2082         !nasm_stricmp(value, "x86-64"))
2083         return IF_X86_64;
2084     if (!nasm_stricmp(value, "ia64") ||
2085         !nasm_stricmp(value, "ia-64") ||
2086         !nasm_stricmp(value, "itanium") ||
2087         !nasm_stricmp(value, "itanic") || !nasm_stricmp(value, "merced"))
2088         return IF_IA64;
2089
2090     report_error(pass0 < 2 ? ERR_NONFATAL : ERR_FATAL,
2091                  "unknown 'cpu' type");
2092
2093     return IF_PLEVEL;           /* the maximum level */
2094 }
2095
2096 static int get_bits(char *value)
2097 {
2098     int i;
2099
2100     if ((i = atoi(value)) == 16)
2101         return i;               /* set for a 16-bit segment */
2102     else if (i == 32) {
2103         if (cpu < IF_386) {
2104             report_error(ERR_NONFATAL,
2105                          "cannot specify 32-bit segment on processor below a 386");
2106             i = 16;
2107         }
2108     } else if (i == 64) {
2109         if (cpu < IF_X86_64) {
2110             report_error(ERR_NONFATAL,
2111                          "cannot specify 64-bit segment on processor below an x86-64");
2112             i = 16;
2113         }
2114         if (i != maxbits) {
2115             report_error(ERR_NONFATAL,
2116                          "%s output format does not support 64-bit code",
2117                          ofmt->shortname);
2118             i = 16;
2119         }
2120     } else {
2121         report_error(pass0 < 2 ? ERR_NONFATAL : ERR_FATAL,
2122                      "`%s' is not a valid segment size; must be 16, 32 or 64",
2123                      value);
2124         i = 16;
2125     }
2126     return i;
2127 }
2128
2129 /* end of nasm.c */