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 bool want_usage;
 154 static bool 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 && !terminate_after_phase)
 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     return terminate_after_phase;
 466 }
 467
 468 /*
 469  * Get a parameter for a command line option.
 470  * First arg must be in the form of e.g. -f...
 471  */
 472 static char *get_param(char *p, char *q, bool *advance)
 473 {
 474     *advance = false;
 475     if (p[2]) {                 /* the parameter's in the option */
 476         p += 2;
 477         while (nasm_isspace(*p))
 478             p++;
 479         return p;
 480     }
 481     if (q && q[0]) {
 482         *advance = true;
 483         return q;
 484     }
 485     report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 486                  "option `-%c' requires an argument", p[1]);
 487     return NULL;
 488 }
 489
 490 /*
 491  * Copy a filename
 492  */
 493 static void copy_filename(char *dst, const char *src)
 494 {
 495     size_t len = strlen(src);
 496
 497     if (len >= (size_t)FILENAME_MAX) {
 498         report_error(ERR_FATAL | ERR_NOFILE, "file name too long");
 499         return;
 500     }
 501     strncpy(dst, src, FILENAME_MAX);
 502 }
 503
 504 /*
 505  * Convert a string to Make-safe form
 506  */
 507 static char *quote_for_make(const char *str)
 508 {
 509     const char *p;
 510     char *os, *q;
 511
 512     size_t n = 1;               /* Terminating zero */
 513     size_t nbs = 0;
 514
 515     if (!str)
 516         return NULL;
 517
 518     for (p = str; *p; p++) {
 519         switch (*p) {
 520         case ' ':
 521         case '\t':
 522             /* Convert N backslashes + ws -> 2N+1 backslashes + ws */
 523             n += nbs + 2;
 524             nbs = 0;
 525             break;
 526         case '$':
 527         case '#':
 528             nbs = 0;
 529             n += 2;
 530             break;
 531         case '\\':
 532             nbs++;
 533             n++;
 534             break;
 535         default:
 536             nbs = 0;
 537             n++;
 538         break;
 539         }
 540     }
 541
 542     /* Convert N backslashes at the end of filename to 2N backslashes */
 543     if (nbs)
 544         n += nbs;
 545
 546     os = q = nasm_malloc(n);
 547
 548     nbs = 0;
 549     for (p = str; *p; p++) {
 550         switch (*p) {
 551         case ' ':
 552         case '\t':
 553             while (nbs--)
 554                 *q++ = '\\';
 555             *q++ = '\\';
 556             *q++ = *p;
 557             break;
 558         case '$':
 559             *q++ = *p;
 560             *q++ = *p;
 561             nbs = 0;
 562             break;
 563         case '#':
 564             *q++ = '\\';
 565             *q++ = *p;
 566             nbs = 0;
 567             break;
 568         case '\\':
 569             *q++ = *p;
 570             nbs++;
 571             break;
 572         default:
 573             *q++ = *p;
 574             nbs = 0;
 575         break;
 576         }
 577     }
 578     while (nbs--)
 579         *q++ = '\\';
 580
 581     *q = '\0';
 582
 583     return os;
 584 }
 585
 586 struct textargs {
 587     const char *label;
 588     int value;
 589 };
 590
 591 #define OPT_PREFIX 0
 592 #define OPT_POSTFIX 1
 593 struct textargs textopts[] = {
 594     {"prefix", OPT_PREFIX},
 595     {"postfix", OPT_POSTFIX},
 596     {NULL, 0}
 597 };
 598
 599 static bool stopoptions = false;
 600 static bool process_arg(char *p, char *q)
 601 {
 602     char *param;
 603     int i;
 604     bool advance = false;
 605     bool do_warn;
 606
 607     if (!p || !p[0])
 608         return false;
 609
 610     if (p[0] == '-' && !stopoptions) {
 611         if (strchr("oOfpPdDiIlFXuUZwW", p[1])) {
 612             /* These parameters take values */
 613             if (!(param = get_param(p, q, &advance)))
 614                 return advance;
 615         }
 616
 617         switch (p[1]) {
 618         case 's':
 619             error_file = stdout;
 620             break;
 621
 622         case 'o':               /* output file */
 623             copy_filename(outname, param);
 624             break;
 625
 626         case 'f':               /* output format */
 627             ofmt = ofmt_find(param);
 628             if (!ofmt) {
 629                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 630                              "unrecognised output format `%s' - "
 631                              "use -hf for a list", param);
 632             }
 633             break;
 634
 635         case 'O':               /* Optimization level */
 636         {
 637             int opt;
 638
 639             if (!*param) {
 640                 /* Naked -O == -Ox */
 641                 optimizing = INT_MAX >> 1; /* Almost unlimited */
 642             } else {
 643                 while (*param) {
 644                     switch (*param) {
 645                     case '0': case '1': case '2': case '3': case '4':
 646                     case '5': case '6': case '7': case '8': case '9':
 647                         opt = strtoul(param, &param, 10);
 648
 649                         /* -O0 -> optimizing == -1, 0.98 behaviour */
 650                         /* -O1 -> optimizing == 0, 0.98.09 behaviour */
 651                         if (opt < 2)
 652                             optimizing = opt - 1;
 653                         else
 654                             optimizing = opt;
 655                         break;
 656
 657                     case 'v':
 658                     case '+':
 659                         param++;
 660                         opt_verbose_info = true;
 661                         break;
 662
 663                     case 'x':
 664                         param++;
 665                         optimizing = INT_MAX >> 1; /* Almost unlimited */
 666                         break;
 667
 668                     default:
 669                         report_error(ERR_FATAL,
 670                                      "unknown optimization option -O%c\n",
 671                                      *param);
 672                         break;
 673                     }
 674                 }
 675             }
 676             break;
 677         }
 678
 679         case 'p':                       /* pre-include */
 680         case 'P':
 681             pp_pre_include(param);
 682             break;
 683
 684         case 'd':                       /* pre-define */
 685         case 'D':
 686             pp_pre_define(param);
 687             break;
 688
 689         case 'u':                       /* un-define */
 690         case 'U':
 691             pp_pre_undefine(param);
 692             break;
 693
 694         case 'i':                       /* include search path */
 695         case 'I':
 696             pp_include_path(param);
 697             break;
 698
 699         case 'l':                       /* listing file */
 700             copy_filename(listname, param);
 701             break;
 702
 703         case 'Z':                       /* error messages file */
 704             strcpy(errname, param);
 705             break;
 706
 707         case 'F':                       /* specify debug format */
 708             ofmt->current_dfmt = dfmt_find(ofmt, param);
 709             if (!ofmt->current_dfmt) {
 710                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 711                              "unrecognized debug format `%s' for"
 712                              " output format `%s'",
 713                              param, ofmt->shortname);
 714             }
 715             using_debug_info = true;
 716             break;
 717
 718         case 'X':               /* specify error reporting format */
 719             if (nasm_stricmp("vc", param) == 0)
 720                 report_error = report_error_vc;
 721             else if (nasm_stricmp("gnu", param) == 0)
 722                 report_error = report_error_gnu;
 723             else
 724                 report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
 725                              "unrecognized error reporting format `%s'",
 726                              param);
 727             break;
 728
 729         case 'g':
 730             using_debug_info = true;
 731             break;
 732
 733         case 'h':
 734             printf
 735                 ("usage: nasm [-@ response file] [-o outfile] [-f format] "
 736                  "[-l listfile]\n"
 737                  "            [options...] [--] filename\n"
 738                  "    or nasm -v   for version info\n\n"
 739                  "    -t          assemble in SciTech TASM compatible mode\n"
 740                  "    -g          generate debug information in selected format.\n");
 741             printf
 742                 ("    -E (or -e)  preprocess only (writes output to stdout by default)\n"
 743                  "    -a          don't preprocess (assemble only)\n"
 744                  "    -M          generate Makefile dependencies on stdout\n"
 745                  "    -MG         d:o, missing files assumed generated\n\n"
 746                  "    -Z<file>    redirect error messages to file\n"
 747                  "    -s          redirect error messages to stdout\n\n"
 748                  "    -F format   select a debugging format\n\n"
 749                  "    -I<path>    adds a pathname to the include file path\n");
 750             printf
 751                 ("    -O<digit>   optimize branch offsets (-O0 disables, default)\n"
 752                  "    -P<file>    pre-includes a file\n"
 753                  "    -D<macro>[=<value>] pre-defines a macro\n"
 754                  "    -U<macro>   undefines a macro\n"
 755                  "    -X<format>  specifies error reporting format (gnu or vc)\n"
 756                  "    -w+foo      enables warning foo (equiv. -Wfoo)\n"
 757                  "    -w-foo      disable warning foo (equiv. -Wno-foo)\n"
 758                  "Warnings:\n");
 759             for (i = 0; i <= ERR_WARN_MAX; i++)
 760                 printf("    %-23s %s (default %s)\n",
 761                        warnings[i].name, warnings[i].help,
 762                        warnings[i].enabled ? "on" : "off");
 763             printf
 764                 ("\nresponse files should contain command line parameters"
 765                  ", one per line.\n");
 766             if (p[2] == 'f') {
 767                 printf("\nvalid output formats for -f are"
 768                        " (`*' denotes default):\n");
 769                 ofmt_list(ofmt, stdout);
 770             } else {
 771                 printf("\nFor a list of valid output formats, use -hf.\n");
 772                 printf("For a list of debug formats, use -f <form> -y.\n");
 773             }
 774             exit(0);            /* never need usage message here */
 775             break;
 776
 777         case 'y':
 778             printf("\nvalid debug formats for '%s' output format are"
 779                    " ('*' denotes default):\n", ofmt->shortname);
 780             dfmt_list(ofmt, stdout);
 781             exit(0);
 782             break;
 783
 784         case 't':
 785             tasm_compatible_mode = true;
 786             break;
 787
 788         case 'v':
 789             printf("NASM version %s compiled on %s%s\n",
 790                    nasm_version, nasm_date, nasm_compile_options);
 791             exit(0);        /* never need usage message here */
 792             break;
 793
 794         case 'e':              /* preprocess only */
 795         case 'E':
 796             operating_mode = op_preprocess;
 797             break;
 798
 799         case 'a':              /* assemble only - don't preprocess */
 800             preproc = &no_pp;
 801             break;
 802
 803         case 'W':
 804             if (param[0] == 'n' && param[1] == 'o' && param[2] == '-') {
 805                 do_warn = false;
 806                 param += 3;
 807             } else {
 808                 do_warn = true;
 809             }
 810             goto set_warning;
 811
 812         case 'w':
 813             if (param[0] != '+' && param[0] != '-') {
 814                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 815                              "invalid option to `-w'");
 816                 break;
 817             }
 818             do_warn = (param[0] == '+');
 819             param++;
 820             goto set_warning;
 821         set_warning:
 822             for (i = 0; i <= ERR_WARN_MAX; i++)
 823                 if (!nasm_stricmp(param, warnings[i].name))
 824                     break;
 825             if (i <= ERR_WARN_MAX)
 826                 warning_on_global[i] = do_warn;
 827             else if (!nasm_stricmp(param, "all"))
 828                 for (i = 1; i <= ERR_WARN_MAX; i++)
 829                     warning_on_global[i] = do_warn;
 830             else if (!nasm_stricmp(param, "none"))
 831                 for (i = 1; i <= ERR_WARN_MAX; i++)
 832                     warning_on_global[i] = !do_warn;
 833             else
 834                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 835                              "invalid warning `%s'", param);
 836             break;
 837
 838         case 'M':
 839             switch (p[2]) {
 840             case 0:
 841                 operating_mode = op_depend;
 842                 break;
 843             case 'G':
 844                 operating_mode = op_depend;
 845                 depend_missing_ok = true;
 846                 break;
 847             case 'P':
 848                 depend_emit_phony = true;
 849                 break;
 850             case 'D':
 851                 depend_file = q;
 852                 advance = true;
 853                 break;
 854             case 'T':
 855                 depend_target = q;
 856                 advance = true;
 857                 break;
 858             case 'Q':
 859                 depend_target = quote_for_make(q);
 860                 advance = true;
 861                 break;
 862             default:
 863                 report_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
 864                              "unknown dependency option `-M%c'", p[2]);
 865                 break;
 866             }
 867             if (advance && (!q || !q[0])) {
 868                 report_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
 869                              "option `-M%c' requires a parameter", p[2]);
 870                 break;
 871             }
 872             break;
 873
 874         case '-':
 875             {
 876                 int s;
 877
 878                 if (p[2] == 0) {        /* -- => stop processing options */
 879                     stopoptions = 1;
 880                     break;
 881                 }
 882                 for (s = 0; textopts[s].label; s++) {
 883                     if (!nasm_stricmp(p + 2, textopts[s].label)) {
 884                         break;
 885                     }
 886                 }
 887
 888                 switch (s) {
 889
 890                 case OPT_PREFIX:
 891                 case OPT_POSTFIX:
 892                     {
 893                         if (!q) {
 894                             report_error(ERR_NONFATAL | ERR_NOFILE |
 895                                          ERR_USAGE,
 896                                          "option `--%s' requires an argument",
 897                                          p + 2);
 898                             break;
 899                         } else {
 900                             advance = 1, param = q;
 901                         }
 902
 903                         if (s == OPT_PREFIX) {
 904                             strncpy(lprefix, param, PREFIX_MAX - 1);
 905                             lprefix[PREFIX_MAX - 1] = 0;
 906                             break;
 907                         }
 908                         if (s == OPT_POSTFIX) {
 909                             strncpy(lpostfix, param, POSTFIX_MAX - 1);
 910                             lpostfix[POSTFIX_MAX - 1] = 0;
 911                             break;
 912                         }
 913                         break;
 914                     }
 915                 default:
 916                     {
 917                         report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 918                                      "unrecognised option `--%s'", p + 2);
 919                         break;
 920                     }
 921                 }
 922                 break;
 923             }
 924
 925         default:
 926             if (!ofmt->setinfo(GI_SWITCH, &p))
 927                 report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 928                              "unrecognised option `-%c'", p[1]);
 929             break;
 930         }
 931     } else {
 932         if (*inname) {
 933             report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
 934                          "more than one input file specified");
 935         } else {
 936             copy_filename(inname, p);
 937         }
 938     }
 939
 940     return advance;
 941 }
 942
 943 #define ARG_BUF_DELTA 128
 944
 945 static void process_respfile(FILE * rfile)
 946 {
 947     char *buffer, *p, *q, *prevarg;
 948     int bufsize, prevargsize;
 949
 950     bufsize = prevargsize = ARG_BUF_DELTA;
 951     buffer = nasm_malloc(ARG_BUF_DELTA);
 952     prevarg = nasm_malloc(ARG_BUF_DELTA);
 953     prevarg[0] = '\0';
 954
 955     while (1) {                 /* Loop to handle all lines in file */
 956         p = buffer;
 957         while (1) {             /* Loop to handle long lines */
 958             q = fgets(p, bufsize - (p - buffer), rfile);
 959             if (!q)
 960                 break;
 961             p += strlen(p);
 962             if (p > buffer && p[-1] == '\n')
 963                 break;
 964             if (p - buffer > bufsize - 10) {
 965                 int offset;
 966                 offset = p - buffer;
 967                 bufsize += ARG_BUF_DELTA;
 968                 buffer = nasm_realloc(buffer, bufsize);
 969                 p = buffer + offset;
 970             }
 971         }
 972
 973         if (!q && p == buffer) {
 974             if (prevarg[0])
 975                 process_arg(prevarg, NULL);
 976             nasm_free(buffer);
 977             nasm_free(prevarg);
 978             return;
 979         }
 980
 981         /*
 982          * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
 983          * them are present at the end of the line.
 984          */
 985         *(p = &buffer[strcspn(buffer, "\r\n\032")]) = '\0';
 986
 987         while (p > buffer && nasm_isspace(p[-1]))
 988             *--p = '\0';
 989
 990         p = buffer;
 991         while (nasm_isspace(*p))
 992             p++;
 993
 994         if (process_arg(prevarg, p))
 995             *p = '\0';
 996
 997         if ((int) strlen(p) > prevargsize - 10) {
 998             prevargsize += ARG_BUF_DELTA;
 999             prevarg = nasm_realloc(prevarg, prevargsize);
1000         }
1001         strncpy(prevarg, p, prevargsize);
1002     }
1003 }
1004
1005 /* Function to process args from a string of args, rather than the
1006  * argv array. Used by the environment variable and response file
1007  * processing.
1008  */
1009 static void process_args(char *args)
1010 {
1011     char *p, *q, *arg, *prevarg;
1012     char separator = ' ';
1013
1014     p = args;
1015     if (*p && *p != '-')
1016         separator = *p++;
1017     arg = NULL;
1018     while (*p) {
1019         q = p;
1020         while (*p && *p != separator)
1021             p++;
1022         while (*p == separator)
1023             *p++ = '\0';
1024         prevarg = arg;
1025         arg = q;
1026         if (process_arg(prevarg, arg))
1027             arg = NULL;
1028     }
1029     if (arg)
1030         process_arg(arg, NULL);
1031 }
1032
1033 static void process_response_file(const char *file)
1034 {
1035     char str[2048];
1036     FILE *f = fopen(file, "r");
1037     if (!f) {
1038         perror(file);
1039         exit(-1);
1040     }
1041     while (fgets(str, sizeof str, f)) {
1042         process_args(str);
1043     }
1044     fclose(f);
1045 }
1046
1047 static void parse_cmdline(int argc, char **argv)
1048 {
1049     FILE *rfile;
1050     char *envreal, *envcopy = NULL, *p, *arg;
1051     int i;
1052
1053     *inname = *outname = *listname = *errname = '\0';
1054     for (i = 0; i <= ERR_WARN_MAX; i++)
1055         warning_on_global[i] = warnings[i].enabled;
1056
1057     /*
1058      * First, process the NASMENV environment variable.
1059      */
1060     envreal = getenv("NASMENV");
1061     arg = NULL;
1062     if (envreal) {
1063         envcopy = nasm_strdup(envreal);
1064         process_args(envcopy);
1065         nasm_free(envcopy);
1066     }
1067
1068     /*
1069      * Now process the actual command line.
1070      */
1071     while (--argc) {
1072         bool advance;
1073         argv++;
1074         if (argv[0][0] == '@') {
1075             /* We have a response file, so process this as a set of
1076              * arguments like the environment variable. This allows us
1077              * to have multiple arguments on a single line, which is
1078              * different to the -@resp file processing below for regular
1079              * NASM.
1080              */
1081             process_response_file(argv[0]+1);
1082             argc--;
1083             argv++;
1084         }
1085         if (!stopoptions && argv[0][0] == '-' && argv[0][1] == '@') {
1086             p = get_param(argv[0], argc > 1 ? argv[1] : NULL, &advance);
1087             if (p) {
1088                 rfile = fopen(p, "r");
1089                 if (rfile) {
1090                     process_respfile(rfile);
1091                     fclose(rfile);
1092                 } else
1093                     report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
1094                                  "unable to open response file `%s'", p);
1095             }
1096         } else
1097             advance = process_arg(argv[0], argc > 1 ? argv[1] : NULL);
1098         argv += advance, argc -= advance;
1099     }
1100
1101     /* Look for basic command line typos.  This definitely doesn't
1102        catch all errors, but it might help cases of fumbled fingers. */
1103     if (!*inname)
1104         report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
1105                      "no input file specified");
1106     else if (!strcmp(inname, errname) ||
1107              !strcmp(inname, outname) ||
1108              !strcmp(inname, listname) ||
1109              (depend_file && !strcmp(inname, depend_file)))
1110         report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
1111                      "file `%s' is both input and output file",
1112                      inname);
1113
1114     if (*errname) {
1115         error_file = fopen(errname, "w");
1116         if (!error_file) {
1117             error_file = stderr;        /* Revert to default! */
1118             report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
1119                          "cannot open file `%s' for error messages",
1120                          errname);
1121         }
1122     }
1123 }
1124
1125 /* List of directives */
1126 enum directives {
1127     D_NONE, D_ABSOLUTE, D_BITS, D_COMMON, D_CPU, D_DEBUG, D_DEFAULT,
1128     D_EXTERN, D_FLOAT, D_GLOBAL, D_LIST, D_SECTION, D_SEGMENT, D_WARNING
1129 };
1130 static const char *directives[] = {
1131     "", "absolute", "bits", "common", "cpu", "debug", "default",
1132     "extern", "float", "global", "list", "section", "segment", "warning"
1133 };
1134 static enum directives getkw(char **directive, char **value);
1135
1136 static void assemble_file(char *fname, StrList **depend_ptr)
1137 {
1138     char *directive, *value, *p, *q, *special, *line, debugid[80];
1139     insn output_ins;
1140     int i, validid;
1141     bool rn_error;
1142     int32_t seg;
1143     int64_t offs;
1144     struct tokenval tokval;
1145     expr *e;
1146     int pass_max;
1147
1148     if (cmd_sb == 32 && cmd_cpu < IF_386)
1149         report_error(ERR_FATAL, "command line: "
1150                      "32-bit segment size requires a higher cpu");
1151
1152     pass_max = prev_offset_changed = (INT_MAX >> 1) + 2; /* Almost unlimited */
1153     for (passn = 1; pass0 <= 2; passn++) {
1154         int pass1, pass2;
1155         ldfunc def_label;
1156
1157         pass1 = pass0 == 2 ? 2 : 1;     /* 1, 1, 1, ..., 1, 2 */
1158         pass2 = passn > 1  ? 2 : 1;     /* 1, 2, 2, ..., 2, 2 */
1159         /* pass0                           0, 0, 0, ..., 1, 2 */
1160
1161         def_label = passn > 1 ? redefine_label : define_label;
1162
1163         globalbits = sb = cmd_sb;   /* set 'bits' to command line default */
1164         cpu = cmd_cpu;
1165         if (pass0 == 2) {
1166             if (*listname)
1167                 nasmlist.init(listname, report_error);
1168         }
1169         in_abs_seg = false;
1170         global_offset_changed = 0;  /* set by redefine_label */
1171         location.segment = ofmt->section(NULL, pass2, &sb);
1172         globalbits = sb;
1173         if (passn > 1) {
1174             saa_rewind(forwrefs);
1175             forwref = saa_rstruct(forwrefs);
1176             raa_free(offsets);
1177             offsets = raa_init();
1178         }
1179         preproc->reset(fname, pass1, report_error, evaluate, &nasmlist,
1180                        pass1 == 2 ? depend_ptr : NULL);
1181         memcpy(warning_on, warning_on_global, (ERR_WARN_MAX+1) * sizeof(bool));
1182
1183         globallineno = 0;
1184         if (passn == 1)
1185             location.known = true;
1186         location.offset = offs = GET_CURR_OFFS;
1187
1188         while ((line = preproc->getline())) {
1189             enum directives d;
1190             globallineno++;
1191
1192             /*
1193              * Here we parse our directives; this is not handled by the
1194              * 'real' parser.  This really should be a separate function.
1195              */
1196             directive = line;
1197             d = getkw(&directive, &value);
1198             if (d) {
1199                 int err = 0;
1200
1201                 switch (d) {
1202                 case D_SEGMENT:         /* [SEGMENT n] */
1203                 case D_SECTION:
1204                     seg = ofmt->section(value, pass2, &sb);
1205                     if (seg == NO_SEG) {
1206                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1207                                      "segment name `%s' not recognized",
1208                                      value);
1209                     } else {
1210                         in_abs_seg = false;
1211                         location.segment = seg;
1212                     }
1213                     break;
1214                 case D_EXTERN:          /* [EXTERN label:special] */
1215                     if (*value == '$')
1216                         value++;        /* skip initial $ if present */
1217                     if (pass0 == 2) {
1218                         q = value;
1219                         while (*q && *q != ':')
1220                             q++;
1221                         if (*q == ':') {
1222                             *q++ = '\0';
1223                             ofmt->symdef(value, 0L, 0L, 3, q);
1224                         }
1225                     } else if (passn == 1) {
1226                         q = value;
1227                         validid = true;
1228                         if (!isidstart(*q))
1229                             validid = false;
1230                         while (*q && *q != ':') {
1231                             if (!isidchar(*q))
1232                                 validid = false;
1233                             q++;
1234                         }
1235                         if (!validid) {
1236                             report_error(ERR_NONFATAL,
1237                                          "identifier expected after EXTERN");
1238                             break;
1239                         }
1240                         if (*q == ':') {
1241                             *q++ = '\0';
1242                             special = q;
1243                         } else
1244                             special = NULL;
1245                         if (!is_extern(value)) {        /* allow re-EXTERN to be ignored */
1246                             int temp = pass0;
1247                             pass0 = 1;  /* fake pass 1 in labels.c */
1248                             declare_as_global(value, special,
1249                                               report_error);
1250                             define_label(value, seg_alloc(), 0L, NULL,
1251                                          false, true, ofmt, report_error);
1252                             pass0 = temp;
1253                         }
1254                     }           /* else  pass0 == 1 */
1255                     break;
1256                 case D_BITS:            /* [BITS bits] */
1257                     globalbits = sb = get_bits(value);
1258                     break;
1259                 case D_GLOBAL:          /* [GLOBAL symbol:special] */
1260                     if (*value == '$')
1261                         value++;        /* skip initial $ if present */
1262                     if (pass0 == 2) {   /* pass 2 */
1263                         q = value;
1264                         while (*q && *q != ':')
1265                             q++;
1266                         if (*q == ':') {
1267                             *q++ = '\0';
1268                             ofmt->symdef(value, 0L, 0L, 3, q);
1269                         }
1270                     } else if (pass2 == 1) {    /* pass == 1 */
1271                         q = value;
1272                         validid = true;
1273                         if (!isidstart(*q))
1274                             validid = false;
1275                         while (*q && *q != ':') {
1276                             if (!isidchar(*q))
1277                                 validid = false;
1278                             q++;
1279                         }
1280                         if (!validid) {
1281                             report_error(ERR_NONFATAL,
1282                                          "identifier expected after GLOBAL");
1283                             break;
1284                         }
1285                         if (*q == ':') {
1286                             *q++ = '\0';
1287                             special = q;
1288                         } else
1289                             special = NULL;
1290                         declare_as_global(value, special, report_error);
1291                     }           /* pass == 1 */
1292                     break;
1293                 case D_COMMON:          /* [COMMON symbol size:special] */
1294                 {
1295                     int64_t size;
1296
1297                     if (*value == '$')
1298                         value++;        /* skip initial $ if present */
1299                     p = value;
1300                     validid = true;
1301                     if (!isidstart(*p))
1302                         validid = false;
1303                     while (*p && !nasm_isspace(*p)) {
1304                         if (!isidchar(*p))
1305                             validid = false;
1306                         p++;
1307                     }
1308                     if (!validid) {
1309                         report_error(ERR_NONFATAL,
1310                                      "identifier expected after COMMON");
1311                         break;
1312                     }
1313                     if (*p) {
1314                         while (*p && nasm_isspace(*p))
1315                             *p++ = '\0';
1316                         q = p;
1317                         while (*q && *q != ':')
1318                             q++;
1319                         if (*q == ':') {
1320                             *q++ = '\0';
1321                             special = q;
1322                         } else {
1323                             special = NULL;
1324                         }
1325                         size = readnum(p, &rn_error);
1326                         if (rn_error) {
1327                             report_error(ERR_NONFATAL,
1328                                          "invalid size specified"
1329                                          " in COMMON declaration");
1330                             break;
1331                         }
1332                     } else {
1333                         report_error(ERR_NONFATAL,
1334                                      "no size specified in"
1335                                      " COMMON declaration");
1336                         break;
1337                     }
1338
1339                     if (pass0 < 2) {
1340                         define_common(value, seg_alloc(), size,
1341                                       special, ofmt, report_error);
1342                     } else if (pass0 == 2) {
1343                         ofmt->symdef(value, 0L, 0L, 3, special);
1344                     }
1345                     break;
1346                 }
1347                 case D_ABSOLUTE:                /* [ABSOLUTE address] */
1348                     stdscan_reset();
1349                     stdscan_bufptr = value;
1350                     tokval.t_type = TOKEN_INVALID;
1351                     e = evaluate(stdscan, NULL, &tokval, NULL, pass2,
1352                                  report_error, NULL);
1353                     if (e) {
1354                         if (!is_reloc(e))
1355                             report_error(pass0 ==
1356                                          1 ? ERR_NONFATAL : ERR_PANIC,
1357                                          "cannot use non-relocatable expression as "
1358                                          "ABSOLUTE address");
1359                         else {
1360                             abs_seg = reloc_seg(e);
1361                             abs_offset = reloc_value(e);
1362                         }
1363                     } else if (passn == 1)
1364                         abs_offset = 0x100;     /* don't go near zero in case of / */
1365                     else
1366                         report_error(ERR_PANIC, "invalid ABSOLUTE address "
1367                                      "in pass two");
1368                     in_abs_seg = true;
1369                     location.segment = NO_SEG;
1370                     break;
1371                 case D_DEBUG:           /* [DEBUG] */
1372                     p = value;
1373                     q = debugid;
1374                     validid = true;
1375                     if (!isidstart(*p))
1376                         validid = false;
1377                     while (*p && !nasm_isspace(*p)) {
1378                         if (!isidchar(*p))
1379                             validid = false;
1380                         *q++ = *p++;
1381                     }
1382                     *q++ = 0;
1383                     if (!validid) {
1384                         report_error(passn == 1 ? ERR_NONFATAL : ERR_PANIC,
1385                                      "identifier expected after DEBUG");
1386                         break;
1387                     }
1388                     while (*p && nasm_isspace(*p))
1389                         p++;
1390                     if (pass0 == 2)
1391                         ofmt->current_dfmt->debug_directive(debugid, p);
1392                     break;
1393                 case D_WARNING:         /* [WARNING {+|-|*}warn-name] */
1394                     while (*value && nasm_isspace(*value))
1395                         value++;
1396
1397                     switch(*value) {
1398                     case '-': validid = 0; value++; break;
1399                     case '+': validid = 1; value++; break;
1400                     case '*': validid = 2; value++; break;
1401                     default:  validid = 1; break;
1402                     }
1403
1404                     for (i = 1; i <= ERR_WARN_MAX; i++)
1405                         if (!nasm_stricmp(value, warnings[i].name))
1406                             break;
1407                     if (i <= ERR_WARN_MAX) {
1408                         switch(validid) {
1409                         case 0:
1410                             warning_on[i] = false;
1411                             break;
1412                         case 1:
1413                             warning_on[i] = true;
1414                             break;
1415                         case 2:
1416                             warning_on[i] = warning_on_global[i];
1417                             break;
1418                         }
1419                     }
1420                     else
1421                         report_error(ERR_NONFATAL,
1422                                      "invalid warning id in WARNING directive");
1423                     break;
1424                 case D_CPU:             /* [CPU] */
1425                     cpu = get_cpu(value);
1426                     break;
1427                 case D_LIST:            /* [LIST {+|-}] */
1428                     while (*value && nasm_isspace(*value))
1429                         value++;
1430
1431                     if (*value == '+') {
1432                         user_nolist = 0;
1433                     } else {
1434                         if (*value == '-') {
1435                             user_nolist = 1;
1436                         } else {
1437                             err = 1;
1438                         }
1439                     }
1440                     break;
1441                 case D_DEFAULT:         /* [DEFAULT] */
1442                     stdscan_reset();
1443                     stdscan_bufptr = value;
1444                     tokval.t_type = TOKEN_INVALID;
1445                     if (stdscan(NULL, &tokval) == TOKEN_SPECIAL) {
1446                         switch ((int)tokval.t_integer) {
1447                         case S_REL:
1448                             globalrel = 1;
1449                             break;
1450                         case S_ABS:
1451                             globalrel = 0;
1452                             break;
1453                         default:
1454                             err = 1;
1455                             break;
1456                         }
1457                     } else {
1458                         err = 1;
1459                     }
1460                     break;
1461                 case D_FLOAT:
1462                     if (float_option(value)) {
1463                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1464                                      "unknown 'float' directive: %s",
1465                                      value);
1466                     }
1467                     break;
1468                 default:
1469                     if (!ofmt->directive(directive, value, pass2))
1470                         report_error(pass1 == 1 ? ERR_NONFATAL : ERR_PANIC,
1471                                      "unrecognised directive [%s]",
1472                                      directive);
1473                 }
1474                 if (err) {
1475                     report_error(ERR_NONFATAL,
1476                                  "invalid parameter to [%s] directive",
1477                                  directive);
1478                 }
1479             } else {            /* it isn't a directive */
1480
1481                 parse_line(pass1, line, &output_ins,
1482                            report_error, evaluate, def_label);
1483
1484                 if (optimizing > 0) {
1485                     if (forwref != NULL && globallineno == forwref->lineno) {
1486                         output_ins.forw_ref = true;
1487                         do {
1488                             output_ins.oprs[forwref->operand].opflags |=
1489                                 OPFLAG_FORWARD;
1490                             forwref = saa_rstruct(forwrefs);
1491                         } while (forwref != NULL
1492                                  && forwref->lineno == globallineno);
1493                     } else
1494                         output_ins.forw_ref = false;
1495
1496                     if (output_ins.forw_ref) {
1497                         if (passn == 1) {
1498                             for (i = 0; i < output_ins.operands; i++) {
1499                                 if (output_ins.oprs[i].
1500                                     opflags & OPFLAG_FORWARD) {
1501                                     struct forwrefinfo *fwinf =
1502                                         (struct forwrefinfo *)
1503                                         saa_wstruct(forwrefs);
1504                                     fwinf->lineno = globallineno;
1505                                 fwinf->operand = i;
1506                                 }
1507                             }
1508                         }
1509                     }
1510                 }
1511
1512                 /*  forw_ref */
1513                 if (output_ins.opcode == I_EQU) {
1514                     if (pass1 == 1) {
1515                         /*
1516                          * Special `..' EQUs get processed in pass two,
1517                          * except `..@' macro-processor EQUs which are done
1518                          * in the normal place.
1519                          */
1520                         if (!output_ins.label)
1521                             report_error(ERR_NONFATAL,
1522                                          "EQU not preceded by label");
1523
1524                         else if (output_ins.label[0] != '.' ||
1525                                  output_ins.label[1] != '.' ||
1526                                  output_ins.label[2] == '@') {
1527                             if (output_ins.operands == 1 &&
1528                                 (output_ins.oprs[0].type & IMMEDIATE) &&
1529                                 output_ins.oprs[0].wrt == NO_SEG) {
1530                                 bool isext = !!(output_ins.oprs[0].opflags
1531                                                 & OPFLAG_EXTERN);
1532                                 def_label(output_ins.label,
1533                                           output_ins.oprs[0].segment,
1534                                           output_ins.oprs[0].offset, NULL,
1535                                           false, isext, ofmt,
1536                                           report_error);
1537                             } else if (output_ins.operands == 2
1538                                        && (output_ins.oprs[0].type & IMMEDIATE)
1539                                        && (output_ins.oprs[0].type & COLON)
1540                                        && output_ins.oprs[0].segment == NO_SEG
1541                                        && output_ins.oprs[0].wrt == NO_SEG
1542                                        && (output_ins.oprs[1].type & IMMEDIATE)
1543                                        && output_ins.oprs[1].segment == NO_SEG
1544                                        && output_ins.oprs[1].wrt == NO_SEG) {
1545                                 def_label(output_ins.label,
1546                                           output_ins.oprs[0].offset | SEG_ABS,
1547                                           output_ins.oprs[1].offset,
1548                                           NULL, false, false, ofmt,
1549                                           report_error);
1550                             } else
1551                                 report_error(ERR_NONFATAL,
1552                                              "bad syntax for EQU");
1553                         }
1554                     } else {
1555                         /*
1556                          * Special `..' EQUs get processed here, except
1557                          * `..@' macro processor EQUs which are done above.
1558                          */
1559                         if (output_ins.label[0] == '.' &&
1560                             output_ins.label[1] == '.' &&
1561                             output_ins.label[2] != '@') {
1562                             if (output_ins.operands == 1 &&
1563                                 (output_ins.oprs[0].type & IMMEDIATE)) {
1564                                 define_label(output_ins.label,
1565                                              output_ins.oprs[0].segment,
1566                                              output_ins.oprs[0].offset,
1567                                              NULL, false, false, ofmt,
1568                                              report_error);
1569                             } else if (output_ins.operands == 2
1570                                        && (output_ins.oprs[0].
1571                                            type & IMMEDIATE)
1572                                        && (output_ins.oprs[0].type & COLON)
1573                                        && output_ins.oprs[0].segment ==
1574                                        NO_SEG
1575                                        && (output_ins.oprs[1].
1576                                            type & IMMEDIATE)
1577                                        && output_ins.oprs[1].segment ==
1578                                        NO_SEG) {
1579                                 define_label(output_ins.label,
1580                                              output_ins.oprs[0].
1581                                              offset | SEG_ABS,
1582                                              output_ins.oprs[1].offset,
1583                                              NULL, false, false, ofmt,
1584                                              report_error);
1585                             } else
1586                                 report_error(ERR_NONFATAL,
1587                                              "bad syntax for EQU");
1588                         }
1589                     }
1590                 } else {        /* instruction isn't an EQU */
1591
1592                     if (pass1 == 1) {
1593
1594                         int64_t l = insn_size(location.segment, offs, sb, cpu,
1595                                            &output_ins, report_error);
1596
1597                         /* if (using_debug_info)  && output_ins.opcode != -1) */
1598                         if (using_debug_info)
1599                         {       /* fbk 03/25/01 */
1600                             /* this is done here so we can do debug type info */
1601                             int32_t typeinfo =
1602                                 TYS_ELEMENTS(output_ins.operands);
1603                             switch (output_ins.opcode) {
1604                             case I_RESB:
1605                                 typeinfo =
1606                                     TYS_ELEMENTS(output_ins.oprs[0].
1607                                                  offset) | TY_BYTE;
1608                                 break;
1609                             case I_RESW:
1610                                 typeinfo =
1611                                     TYS_ELEMENTS(output_ins.oprs[0].
1612                                                  offset) | TY_WORD;
1613                                 break;
1614                             case I_RESD:
1615                                 typeinfo =
1616                                     TYS_ELEMENTS(output_ins.oprs[0].
1617                                                  offset) | TY_DWORD;
1618                                 break;
1619                             case I_RESQ:
1620                                 typeinfo =
1621                                     TYS_ELEMENTS(output_ins.oprs[0].
1622                                                  offset) | TY_QWORD;
1623                                 break;
1624                             case I_REST:
1625                                 typeinfo =
1626                                     TYS_ELEMENTS(output_ins.oprs[0].
1627                                                  offset) | TY_TBYTE;
1628                                 break;
1629                             case I_RESO:
1630                                 typeinfo =
1631                                     TYS_ELEMENTS(output_ins.oprs[0].
1632                                                  offset) | TY_OWORD;
1633                                 break;
1634                             case I_RESY:
1635                                 typeinfo =
1636                                     TYS_ELEMENTS(output_ins.oprs[0].
1637                                                  offset) | TY_YWORD;
1638                                 break;
1639                             case I_DB:
1640                                 typeinfo |= TY_BYTE;
1641                                 break;
1642                             case I_DW:
1643                                 typeinfo |= TY_WORD;
1644                                 break;
1645                             case I_DD:
1646                                 if (output_ins.eops_float)
1647                                     typeinfo |= TY_FLOAT;
1648                                 else
1649                                     typeinfo |= TY_DWORD;
1650                                 break;
1651                             case I_DQ:
1652                                 typeinfo |= TY_QWORD;
1653                                 break;
1654                             case I_DT:
1655                                 typeinfo |= TY_TBYTE;
1656                                 break;
1657                             case I_DO:
1658                                 typeinfo |= TY_OWORD;
1659                                 break;
1660                             case I_DY:
1661                                 typeinfo |= TY_YWORD;
1662                                 break;
1663                             default:
1664                                 typeinfo = TY_LABEL;
1665
1666                             }
1667
1668                             ofmt->current_dfmt->debug_typevalue(typeinfo);
1669
1670                         }
1671                         if (l != -1) {
1672                             offs += l;
1673                             SET_CURR_OFFS(offs);
1674                         }
1675                         /*
1676                          * else l == -1 => invalid instruction, which will be
1677                          * flagged as an error on pass 2
1678                          */
1679
1680                     } else {
1681                         offs += assemble(location.segment, offs, sb, cpu,
1682                                          &output_ins, ofmt, report_error,
1683                                          &nasmlist);
1684                         SET_CURR_OFFS(offs);
1685
1686                     }
1687                 }               /* not an EQU */
1688                 cleanup_insn(&output_ins);
1689             }
1690             nasm_free(line);
1691             location.offset = offs = GET_CURR_OFFS;
1692         }                       /* end while (line = preproc->getline... */
1693
1694         if (pass0 && global_offset_changed)
1695             report_error(ERR_NONFATAL,
1696                          "phase error detected at end of assembly.");
1697
1698         if (pass1 == 1)
1699             preproc->cleanup(1);
1700
1701         if ((passn > 1 && !global_offset_changed) || pass0 == 2) {
1702             pass0++;
1703         } else if (global_offset_changed &&
1704                  global_offset_changed < prev_offset_changed) {
1705             prev_offset_changed = global_offset_changed;
1706             stall_count = 0;
1707         } else {
1708             stall_count++;
1709         }
1710
1711         if (terminate_after_phase)
1712             break;
1713
1714         if ((stall_count > 997) || (passn >= pass_max)) {
1715             /* We get here if the labels don't converge
1716              * Example: FOO equ FOO + 1
1717              */
1718              report_error(ERR_NONFATAL,
1719                           "Can't find valid values for all labels "
1720                           "after %d passes, giving up.", passn);
1721              report_error(ERR_NONFATAL,
1722                           "Possible causes: recursive EQUs, macro abuse.");
1723              terminate_after_phase = true;
1724              break;
1725         }
1726     }
1727
1728     preproc->cleanup(0);
1729     nasmlist.cleanup();
1730     if (!terminate_after_phase && opt_verbose_info) {
1731         /*  -On and -Ov switches */
1732         fprintf(stdout, "info: assembly required 1+%d+1 passes\n", passn-3);
1733     }
1734 }
1735
1736 static enum directives getkw(char **directive, char **value)
1737 {
1738     char *p, *q, *buf;
1739
1740     buf = *directive;
1741
1742     /*  allow leading spaces or tabs */
1743     while (*buf == ' ' || *buf == '\t')
1744         buf++;
1745
1746     if (*buf != '[')
1747         return 0;
1748
1749     p = buf;
1750
1751     while (*p && *p != ']')
1752         p++;
1753
1754     if (!*p)
1755         return 0;
1756
1757     q = p++;
1758
1759     while (*p && *p != ';') {
1760         if (!nasm_isspace(*p))
1761             return 0;
1762         p++;
1763     }
1764     q[1] = '\0';
1765
1766     *directive = p = buf + 1;
1767     while (*buf && *buf != ' ' && *buf != ']' && *buf != '\t')
1768         buf++;
1769     if (*buf == ']') {
1770         *buf = '\0';
1771         *value = buf;
1772     } else {
1773         *buf++ = '\0';
1774         while (nasm_isspace(*buf))
1775             buf++;              /* beppu - skip leading whitespace */
1776         *value = buf;
1777         while (*buf != ']')
1778             buf++;
1779         *buf++ = '\0';
1780     }
1781
1782     return bsii(*directive, directives, elements(directives));
1783 }
1784
1785 /**
1786  * gnu style error reporting
1787  * This function prints an error message to error_file in the
1788  * style used by GNU. An example would be:
1789  * file.asm:50: error: blah blah blah
1790  * where file.asm is the name of the file, 50 is the line number on
1791  * which the error occurs (or is detected) and "error:" is one of
1792  * the possible optional diagnostics -- it can be "error" or "warning"
1793  * or something else.  Finally the line terminates with the actual
1794  * error message.
1795  *
1796  * @param severity the severity of the warning or error
1797  * @param fmt the printf style format string
1798  */
1799 static void report_error_gnu(int severity, const char *fmt, ...)
1800 {
1801     va_list ap;
1802
1803     if (is_suppressed_warning(severity))
1804         return;
1805
1806     if (severity & ERR_NOFILE)
1807         fputs("nasm: ", error_file);
1808     else {
1809         char *currentfile = NULL;
1810         int32_t lineno = 0;
1811         src_get(&lineno, &currentfile);
1812         fprintf(error_file, "%s:%"PRId32": ", currentfile, lineno);
1813         nasm_free(currentfile);
1814     }
1815     va_start(ap, fmt);
1816     report_error_common(severity, fmt, ap);
1817     va_end(ap);
1818 }
1819
1820 /**
1821  * MS style error reporting
1822  * This function prints an error message to error_file in the
1823  * style used by Visual C and some other Microsoft tools. An example
1824  * would be:
1825  * file.asm(50) : error: blah blah blah
1826  * where file.asm is the name of the file, 50 is the line number on
1827  * which the error occurs (or is detected) and "error:" is one of
1828  * the possible optional diagnostics -- it can be "error" or "warning"
1829  * or something else.  Finally the line terminates with the actual
1830  * error message.
1831  *
1832  * @param severity the severity of the warning or error
1833  * @param fmt the printf style format string
1834  */
1835 static void report_error_vc(int severity, const char *fmt, ...)
1836 {
1837     va_list ap;
1838
1839     if (is_suppressed_warning(severity))
1840         return;
1841
1842     if (severity & ERR_NOFILE)
1843         fputs("nasm: ", error_file);
1844     else {
1845         char *currentfile = NULL;
1846         int32_t lineno = 0;
1847         src_get(&lineno, &currentfile);
1848         fprintf(error_file, "%s(%"PRId32") : ", currentfile, lineno);
1849         nasm_free(currentfile);
1850     }
1851     va_start(ap, fmt);
1852     report_error_common(severity, fmt, ap);
1853     va_end(ap);
1854 }
1855
1856 /**
1857  * check for supressed warning
1858  * checks for suppressed warning or pass one only warning and we're
1859  * not in pass 1
1860  *
1861  * @param severity the severity of the warning or error
1862  * @return true if we should abort error/warning printing
1863  */
1864 static bool is_suppressed_warning(int severity)
1865 {
1866     /*
1867      * See if it's a suppressed warning.
1868      */
1869     return (severity & ERR_MASK) == ERR_WARNING &&
1870         (((severity & ERR_WARN_MASK) != 0 &&
1871           !warning_on[(severity & ERR_WARN_MASK) >> ERR_WARN_SHR]) ||
1872          /* See if it's a pass-one only warning and we're not in pass one. */
1873          ((severity & ERR_PASS1) && pass0 != 1) ||
1874          ((severity & ERR_PASS2) && pass0 != 2));
1875 }
1876
1877 /**
1878  * common error reporting
1879  * This is the common back end of the error reporting schemes currently
1880  * implemented.  It prints the nature of the warning and then the
1881  * specific error message to error_file and may or may not return.  It
1882  * doesn't return if the error severity is a "panic" or "debug" type.
1883  *
1884  * @param severity the severity of the warning or error
1885  * @param fmt the printf style format string
1886  */
1887 static void report_error_common(int severity, const char *fmt,
1888                                 va_list args)
1889 {
1890     switch (severity & (ERR_MASK|ERR_NO_SEVERITY)) {
1891     case ERR_WARNING:
1892         fputs("warning: ", error_file);
1893         break;
1894     case ERR_NONFATAL:
1895         fputs("error: ", error_file);
1896         break;
1897     case ERR_FATAL:
1898         fputs("fatal: ", error_file);
1899         break;
1900     case ERR_PANIC:
1901         fputs("panic: ", error_file);
1902         break;
1903     case ERR_DEBUG:
1904         fputs("debug: ", error_file);
1905         break;
1906     default:
1907         break;
1908     }
1909
1910     vfprintf(error_file, fmt, args);
1911     putc('\n', error_file);
1912
1913     if (severity & ERR_USAGE)
1914         want_usage = true;
1915
1916     switch (severity & ERR_MASK) {
1917     case ERR_DEBUG:
1918         /* no further action, by definition */
1919         break;
1920     case ERR_WARNING:
1921         if (warning_on[0])      /* Treat warnings as errors */
1922             terminate_after_phase = true;
1923         break;
1924     case ERR_NONFATAL:
1925         terminate_after_phase = true;
1926         break;
1927     case ERR_FATAL:
1928         if (ofile) {
1929             fclose(ofile);
1930             remove(outname);
1931         }
1932         if (want_usage)
1933             usage();
1934         exit(1);                /* instantly die */
1935         break;                  /* placate silly compilers */
1936     case ERR_PANIC:
1937         fflush(NULL);
1938         /*      abort();        *//* halt, catch fire, and dump core */
1939         exit(3);
1940         break;
1941     }
1942 }
1943
1944 static void usage(void)
1945 {
1946     fputs("type `nasm -h' for help\n", error_file);
1947 }
1948
1949 static void register_output_formats(void)
1950 {
1951     ofmt = ofmt_register(report_error);
1952 }
1953
1954 #define BUF_DELTA 512
1955
1956 static FILE *no_pp_fp;
1957 static efunc no_pp_err;
1958 static ListGen *no_pp_list;
1959 static int32_t no_pp_lineinc;
1960
1961 static void no_pp_reset(char *file, int pass, efunc error, evalfunc eval,
1962                         ListGen * listgen, StrList **deplist)
1963 {
1964     src_set_fname(nasm_strdup(file));
1965     src_set_linnum(0);
1966     no_pp_lineinc = 1;
1967     no_pp_err = error;
1968     no_pp_fp = fopen(file, "r");
1969     if (!no_pp_fp)
1970         no_pp_err(ERR_FATAL | ERR_NOFILE,
1971                   "unable to open input file `%s'", file);
1972     no_pp_list = listgen;
1973     (void)pass;                 /* placate compilers */
1974     (void)eval;                 /* placate compilers */
1975
1976     if (deplist) {
1977         StrList *sl = nasm_malloc(strlen(file)+1+sizeof sl->next);
1978         sl->next = NULL;
1979         strcpy(sl->str, file);
1980         *deplist = sl;
1981     }
1982 }
1983
1984 static char *no_pp_getline(void)
1985 {
1986     char *buffer, *p, *q;
1987     int bufsize;
1988
1989     bufsize = BUF_DELTA;
1990     buffer = nasm_malloc(BUF_DELTA);
1991     src_set_linnum(src_get_linnum() + no_pp_lineinc);
1992
1993     while (1) {                 /* Loop to handle %line */
1994
1995         p = buffer;
1996         while (1) {             /* Loop to handle long lines */
1997             q = fgets(p, bufsize - (p - buffer), no_pp_fp);
1998             if (!q)
1999                 break;
2000             p += strlen(p);
2001             if (p > buffer && p[-1] == '\n')
2002                 break;
2003             if (p - buffer > bufsize - 10) {
2004                 int offset;
2005                 offset = p - buffer;
2006                 bufsize += BUF_DELTA;
2007                 buffer = nasm_realloc(buffer, bufsize);
2008                 p = buffer + offset;
2009             }
2010         }
2011
2012         if (!q && p == buffer) {
2013             nasm_free(buffer);
2014             return NULL;
2015         }
2016
2017         /*
2018          * Play safe: remove CRs, LFs and any spurious ^Zs, if any of
2019          * them are present at the end of the line.
2020          */
2021         buffer[strcspn(buffer, "\r\n\032")] = '\0';
2022
2023         if (!nasm_strnicmp(buffer, "%line", 5)) {
2024             int32_t ln;
2025             int li;
2026             char *nm = nasm_malloc(strlen(buffer));
2027             if (sscanf(buffer + 5, "%"PRId32"+%d %s", &ln, &li, nm) == 3) {
2028                 nasm_free(src_set_fname(nm));
2029                 src_set_linnum(ln);
2030                 no_pp_lineinc = li;
2031                 continue;
2032             }
2033             nasm_free(nm);
2034         }
2035         break;
2036     }
2037
2038     no_pp_list->line(LIST_READ, buffer);
2039
2040     return buffer;
2041 }
2042
2043 static void no_pp_cleanup(int pass)
2044 {
2045     (void)pass;                     /* placate GCC */
2046     fclose(no_pp_fp);
2047 }
2048
2049 static uint32_t get_cpu(char *value)
2050 {
2051     if (!strcmp(value, "8086"))
2052         return IF_8086;
2053     if (!strcmp(value, "186"))
2054         return IF_186;
2055     if (!strcmp(value, "286"))
2056         return IF_286;
2057     if (!strcmp(value, "386"))
2058         return IF_386;
2059     if (!strcmp(value, "486"))
2060         return IF_486;
2061     if (!strcmp(value, "586") || !nasm_stricmp(value, "pentium"))
2062         return IF_PENT;
2063     if (!strcmp(value, "686") ||
2064         !nasm_stricmp(value, "ppro") ||
2065         !nasm_stricmp(value, "pentiumpro") || !nasm_stricmp(value, "p2"))
2066         return IF_P6;
2067     if (!nasm_stricmp(value, "p3") || !nasm_stricmp(value, "katmai"))
2068         return IF_KATMAI;
2069     if (!nasm_stricmp(value, "p4") ||   /* is this right? -- jrc */
2070         !nasm_stricmp(value, "willamette"))
2071         return IF_WILLAMETTE;
2072     if (!nasm_stricmp(value, "prescott"))
2073         return IF_PRESCOTT;
2074     if (!nasm_stricmp(value, "x64") ||
2075         !nasm_stricmp(value, "x86-64"))
2076         return IF_X86_64;
2077     if (!nasm_stricmp(value, "ia64") ||
2078         !nasm_stricmp(value, "ia-64") ||
2079         !nasm_stricmp(value, "itanium") ||
2080         !nasm_stricmp(value, "itanic") || !nasm_stricmp(value, "merced"))
2081         return IF_IA64;
2082
2083     report_error(pass0 < 2 ? ERR_NONFATAL : ERR_FATAL,
2084                  "unknown 'cpu' type");
2085
2086     return IF_PLEVEL;           /* the maximum level */
2087 }
2088
2089 static int get_bits(char *value)
2090 {
2091     int i;
2092
2093     if ((i = atoi(value)) == 16)
2094         return i;               /* set for a 16-bit segment */
2095     else if (i == 32) {
2096         if (cpu < IF_386) {
2097             report_error(ERR_NONFATAL,
2098                          "cannot specify 32-bit segment on processor below a 386");
2099             i = 16;
2100         }
2101     } else if (i == 64) {
2102         if (cpu < IF_X86_64) {
2103             report_error(ERR_NONFATAL,
2104                          "cannot specify 64-bit segment on processor below an x86-64");
2105             i = 16;
2106         }
2107         if (i != maxbits) {
2108             report_error(ERR_NONFATAL,
2109                          "%s output format does not support 64-bit code",
2110                          ofmt->shortname);
2111             i = 16;
2112         }
2113     } else {
2114         report_error(pass0 < 2 ? ERR_NONFATAL : ERR_FATAL,
2115                      "`%s' is not a valid segment size; must be 16, 32 or 64",
2116                      value);
2117         i = 16;
2118     }
2119     return i;
2120 }
2121
2122 /* end of nasm.c */