output/outbin.c

   1 /* outbin.c output routines for the Netwide Assembler to produce
   2  *    flat-form binary files
   3  *
   4  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
   5  * Julian Hall. All rights reserved. The software is
   6  * redistributable under the licence given in the file "Licence"
   7  * distributed in the NASM archive.
   8  */
   9
  10 /* This is the extended version of NASM's original binary output
  11  * format.  It is backward compatible with the original BIN format,
  12  * and contains support for multiple sections and advanced section
  13  * ordering.
  14  *
  15  * Feature summary:
  16  *
  17  * - Users can create an arbitrary number of sections; they are not
  18  *   limited to just ".text", ".data", and ".bss".
  19  *
  20  * - Sections can be either progbits or nobits type.
  21  *
  22  * - You can specify that they be aligned at a certian boundary
  23  *   following the previous section ("align="), or positioned at an
  24  *   arbitrary byte-granular location ("start=").
  25  *
  26  * - You can specify a "virtual" start address for a section, which
  27  *   will be used for the calculation for all address references
  28  *   with respect to that section ("vstart=").
  29  *
  30  * - The ORG directive, as well as the section/segment directive
  31  *   arguments ("align=", "start=", "vstart="), can take a critical
  32  *   expression as their value.  For example: "align=(1 << 12)".
  33  *
  34  * - You can generate map files using the 'map' directive.
  35  *
  36  */
  37
  38 /* Uncomment the following define if you want sections to adapt
  39  * their progbits/nobits state depending on what type of
  40  * instructions are issued, rather than defaulting to progbits.
  41  * Note that this behavior violates the specification.
  42
  43 #define ABIN_SMART_ADAPT
  44
  45 */
  46
  47 #include "compiler.h"
  48
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <ctype.h>
  53 #include <inttypes.h>
  54
  55 #include "nasm.h"
  56 #include "nasmlib.h"
  57 #include "stdscan.h"
  58 #include "labels.h"
  59 #include "eval.h"
  60 #include "outform.h"
  61
  62 #ifdef OF_BIN
  63
  64 struct ofmt *bin_get_ofmt();    /* Prototype goes here since no header file. */
  65
  66 static FILE *fp, *rf = NULL;
  67 static efunc error;
  68
  69 /* Section flags keep track of which attributes the user has defined. */
  70 #define START_DEFINED       0x001
  71 #define ALIGN_DEFINED       0x002
  72 #define FOLLOWS_DEFINED     0x004
  73 #define VSTART_DEFINED      0x008
  74 #define VALIGN_DEFINED      0x010
  75 #define VFOLLOWS_DEFINED    0x020
  76 #define TYPE_DEFINED        0x040
  77 #define TYPE_PROGBITS       0x080
  78 #define TYPE_NOBITS         0x100
  79
  80 /* This struct is used to keep track of symbols for map-file generation. */
  81 static struct bin_label {
  82     char *name;
  83     struct bin_label *next;
  84 } *no_seg_labels, **nsl_tail;
  85
  86 static struct Section {
  87     char *name;
  88     struct SAA *contents;
  89     int64_t length;                /* section length in bytes */
  90
  91 /* Section attributes */
  92     int flags;                  /* see flag definitions above */
  93     uint64_t align;        /* section alignment */
  94     uint64_t valign;       /* notional section alignment */
  95     uint64_t start;        /* section start address */
  96     uint64_t vstart;       /* section virtual start address */
  97     char *follows;              /* the section that this one will follow */
  98     char *vfollows;             /* the section that this one will notionally follow */
  99     int32_t start_index;           /* NASM section id for non-relocated version */
 100     int32_t vstart_index;          /* the NASM section id */
 101
 102     struct bin_label *labels;   /* linked-list of label handles for map output. */
 103     struct bin_label **labels_end;      /* Holds address of end of labels list. */
 104     struct Section *ifollows;   /* Points to previous section (implicit follows). */
 105     struct Section *next;       /* This links sections with a defined start address. */
 106
 107 /* The extended bin format allows for sections to have a "virtual"
 108  * start address.  This is accomplished by creating two sections:
 109  * one beginning at the Load Memory Address and the other beginning
 110  * at the Virtual Memory Address.  The LMA section is only used to
 111  * define the section.<section_name>.start label, but there isn't
 112  * any other good way for us to handle that label.
 113  */
 114
 115 } *sections, *last_section;
 116
 117 static struct Reloc {
 118     struct Reloc *next;
 119     int32_t posn;
 120     int32_t bytes;
 121     int32_t secref;
 122     int32_t secrel;
 123     struct Section *target;
 124 } *relocs, **reloctail;
 125
 126 extern char *stdscan_bufptr;
 127
 128 static uint8_t format_mode;       /* 0 = original bin, 1 = extended bin */
 129 static int32_t current_section;    /* only really needed if format_mode = 0 */
 130 static uint64_t origin;
 131 static int origin_defined;
 132
 133 /* Stuff we need for map-file generation. */
 134 #define MAP_ORIGIN       1
 135 #define MAP_SUMMARY      2
 136 #define MAP_SECTIONS     4
 137 #define MAP_SYMBOLS      8
 138 static int map_control = 0;
 139 static char *infile, *outfile;
 140
 141 static const char *bin_stdmac[] = {
 142     "%define __SECT__ [section .text]",
 143     "%imacro org 1+.nolist",
 144     "[org %1]",
 145     "%endmacro",
 146     "%macro __NASM_CDecl__ 1",
 147     "%endmacro",
 148     NULL
 149 };
 150
 151 static void add_reloc(struct Section *s, int32_t bytes, int32_t secref,
 152                       int32_t secrel)
 153 {
 154     struct Reloc *r;
 155
 156     r = *reloctail = nasm_malloc(sizeof(struct Reloc));
 157     reloctail = &r->next;
 158     r->next = NULL;
 159     r->posn = s->length;
 160     r->bytes = bytes;
 161     r->secref = secref;
 162     r->secrel = secrel;
 163     r->target = s;
 164 }
 165
 166 static struct Section *find_section_by_name(const char *name)
 167 {
 168     struct Section *s;
 169
 170     for (s = sections; s; s = s->next)
 171         if (!strcmp(s->name, name))
 172             break;
 173     return s;
 174 }
 175
 176 static struct Section *find_section_by_index(int32_t index)
 177 {
 178     struct Section *s;
 179
 180     for (s = sections; s; s = s->next)
 181         if ((index == s->vstart_index) || (index == s->start_index))
 182             break;
 183     return s;
 184 }
 185
 186 static struct Section *create_section(char *name)
 187 {                               /* Create a new section. */
 188     last_section->next = nasm_malloc(sizeof(struct Section));
 189     last_section->next->ifollows = last_section;
 190     last_section = last_section->next;
 191     last_section->labels = NULL;
 192     last_section->labels_end = &(last_section->labels);
 193
 194     /* Initialize section attributes. */
 195     last_section->name = nasm_strdup(name);
 196     last_section->contents = saa_init(1L);
 197     last_section->follows = last_section->vfollows = 0;
 198     last_section->length = 0;
 199     last_section->flags = 0;
 200     last_section->next = NULL;
 201
 202     /* Register our sections with NASM. */
 203     last_section->vstart_index = seg_alloc();
 204     last_section->start_index = seg_alloc();
 205     return last_section;
 206 }
 207
 208 static void bin_cleanup(int debuginfo)
 209 {
 210     struct Section *g, **gp;
 211     struct Section *gs = NULL, **gsp;
 212     struct Section *s, **sp;
 213     struct Section *nobits = NULL, **nt;
 214     struct Section *last_progbits;
 215     struct bin_label *l;
 216     struct Reloc *r;
 217     uint64_t pend;
 218     int h;
 219
 220     (void)debuginfo;      /* placate optimizers */
 221
 222 #ifdef DEBUG
 223     fprintf(stdout,
 224             "bin_cleanup: Sections were initially referenced in this order:\n");
 225     for (h = 0, s = sections; s; h++, s = s->next)
 226         fprintf(stdout, "%i. %s\n", h, s->name);
 227 #endif
 228
 229     /* Assembly has completed, so now we need to generate the output file.
 230      * Step 1: Separate progbits and nobits sections into separate lists.
 231      * Step 2: Sort the progbits sections into their output order.
 232      * Step 3: Compute start addresses for all progbits sections.
 233      * Step 4: Compute vstart addresses for all sections.
 234      * Step 5: Apply relocations.
 235      * Step 6: Write the sections' data to the output file.
 236      * Step 7: Generate the map file.
 237      * Step 8: Release all allocated memory.
 238      */
 239
 240     /* To do: Smart section-type adaptation could leave some empty sections
 241      * without a defined type (progbits/nobits).  Won't fix now since this
 242      * feature will be disabled.  */
 243
 244     /* Step 1: Split progbits and nobits sections into separate lists. */
 245
 246     nt = &nobits;
 247     /* Move nobits sections into a separate list.  Also pre-process nobits
 248      * sections' attributes. */
 249     for (sp = &sections->next, s = sections->next; s; s = *sp) {        /* Skip progbits sections. */
 250         if (s->flags & TYPE_PROGBITS) {
 251             sp = &s->next;
 252             continue;
 253         }
 254         /* Do some special pre-processing on nobits sections' attributes. */
 255         if (s->flags & (START_DEFINED | ALIGN_DEFINED | FOLLOWS_DEFINED)) {     /* Check for a mixture of real and virtual section attributes. */
 256             if (s->
 257                 flags & (VSTART_DEFINED | VALIGN_DEFINED |
 258                          VFOLLOWS_DEFINED))
 259                 error(ERR_FATAL,
 260                       "cannot mix real and virtual attributes"
 261                       " in nobits section (%s)", s->name);
 262             /* Real and virtual attributes mean the same thing for nobits sections. */
 263             if (s->flags & START_DEFINED) {
 264                 s->vstart = s->start;
 265                 s->flags |= VSTART_DEFINED;
 266             }
 267             if (s->flags & ALIGN_DEFINED) {
 268                 s->valign = s->align;
 269                 s->flags |= VALIGN_DEFINED;
 270             }
 271             if (s->flags & FOLLOWS_DEFINED) {
 272                 s->vfollows = s->follows;
 273                 s->flags |= VFOLLOWS_DEFINED;
 274                 s->flags &= ~FOLLOWS_DEFINED;
 275             }
 276         }
 277         /* Every section must have a start address. */
 278         if (s->flags & VSTART_DEFINED) {
 279             s->start = s->vstart;
 280             s->flags |= START_DEFINED;
 281         }
 282         /* Move the section into the nobits list. */
 283         *sp = s->next;
 284         s->next = NULL;
 285         *nt = s;
 286         nt = &s->next;
 287     }
 288
 289     /* Step 2: Sort the progbits sections into their output order. */
 290
 291     /* In Step 2 we move around sections in groups.  A group
 292      * begins with a section (group leader) that has a user-
 293      * defined start address or follows section.  The remainder
 294      * of the group is made up of the sections that implicitly
 295      * follow the group leader (i.e., they were defined after
 296      * the group leader and were not given an explicit start
 297      * address or follows section by the user). */
 298
 299     /* For anyone attempting to read this code:
 300      * g (group) points to a group of sections, the first one of which has
 301      *   a user-defined start address or follows section.
 302      * gp (g previous) holds the location of the pointer to g.
 303      * gs (g scan) is a temp variable that we use to scan to the end of the group.
 304      * gsp (gs previous) holds the location of the pointer to gs.
 305      * nt (nobits tail) points to the nobits section-list tail.
 306      */
 307
 308     /* Link all 'follows' groups to their proper position.  To do
 309      * this we need to know three things: the start of the group
 310      * to relocate (g), the section it is following (s), and the
 311      * end of the group we're relocating (gs). */
 312     for (gp = &sections, g = sections; g; g = gs) {     /* Find the next follows group that is out of place (g). */
 313         if (!(g->flags & FOLLOWS_DEFINED)) {
 314             while (g->next) {
 315                 if ((g->next->flags & FOLLOWS_DEFINED) &&
 316                     strcmp(g->name, g->next->follows))
 317                     break;
 318                 g = g->next;
 319             }
 320             if (!g->next)
 321                 break;
 322             gp = &g->next;
 323             g = g->next;
 324         }
 325         /* Find the section that this group follows (s). */
 326         for (sp = &sections, s = sections;
 327              s && strcmp(s->name, g->follows);
 328              sp = &s->next, s = s->next) ;
 329         if (!s)
 330             error(ERR_FATAL, "section %s follows an invalid or"
 331                   " unknown section (%s)", g->name, g->follows);
 332         if (s->next && (s->next->flags & FOLLOWS_DEFINED) &&
 333             !strcmp(s->name, s->next->follows))
 334             error(ERR_FATAL, "sections %s and %s can't both follow"
 335                   " section %s", g->name, s->next->name, s->name);
 336         /* Find the end of the current follows group (gs). */
 337         for (gsp = &g->next, gs = g->next;
 338              gs && (gs != s) && !(gs->flags & START_DEFINED);
 339              gsp = &gs->next, gs = gs->next) {
 340             if (gs->next && (gs->next->flags & FOLLOWS_DEFINED) &&
 341                 strcmp(gs->name, gs->next->follows)) {
 342                 gsp = &gs->next;
 343                 gs = gs->next;
 344                 break;
 345             }
 346         }
 347         /* Re-link the group after its follows section. */
 348         *gsp = s->next;
 349         s->next = g;
 350         *gp = gs;
 351     }
 352
 353     /* Link all 'start' groups to their proper position.  Once
 354      * again we need to know g, s, and gs (see above).  The main
 355      * difference is we already know g since we sort by moving
 356      * groups from the 'unsorted' list into a 'sorted' list (g
 357      * will always be the first section in the unsorted list). */
 358     for (g = sections, sections = NULL; g; g = gs) {    /* Find the section that we will insert this group before (s). */
 359         for (sp = &sections, s = sections; s; sp = &s->next, s = s->next)
 360             if ((s->flags & START_DEFINED) && (g->start < s->start))
 361                 break;
 362         /* Find the end of the group (gs). */
 363         for (gs = g->next, gsp = &g->next;
 364              gs && !(gs->flags & START_DEFINED);
 365              gsp = &gs->next, gs = gs->next) ;
 366         /* Re-link the group before the target section. */
 367         *sp = g;
 368         *gsp = s;
 369     }
 370
 371     /* Step 3: Compute start addresses for all progbits sections. */
 372
 373     /* Make sure we have an origin and a start address for the first section. */
 374     if (origin_defined)
 375         switch (sections->flags & (START_DEFINED | ALIGN_DEFINED)) {
 376         case START_DEFINED | ALIGN_DEFINED:
 377         case START_DEFINED:
 378             /* Make sure this section doesn't begin before the origin. */
 379             if (sections->start < origin)
 380                 error(ERR_FATAL, "section %s begins"
 381                       " before program origin", sections->name);
 382             break;
 383         case ALIGN_DEFINED:
 384             sections->start = ((origin + sections->align - 1) &
 385                                ~(sections->align - 1));
 386             break;
 387         case 0:
 388             sections->start = origin;
 389     } else {
 390         if (!(sections->flags & START_DEFINED))
 391             sections->start = 0;
 392         origin = sections->start;
 393     }
 394     sections->flags |= START_DEFINED;
 395
 396     /* Make sure each section has an explicit start address.  If it
 397      * doesn't, then compute one based its alignment and the end of
 398      * the previous section. */
 399     for (pend = sections->start, g = s = sections; g; g = g->next) {    /* Find the next section that could cause an overlap situation
 400                                                                          * (has a defined start address, and is not zero length). */
 401         if (g == s)
 402             for (s = g->next;
 403                  s && ((s->length == 0) || !(s->flags & START_DEFINED));
 404                  s = s->next) ;
 405         /* Compute the start address of this section, if necessary. */
 406         if (!(g->flags & START_DEFINED)) {      /* Default to an alignment of 4 if unspecified. */
 407             if (!(g->flags & ALIGN_DEFINED)) {
 408                 g->align = 4;
 409                 g->flags |= ALIGN_DEFINED;
 410             }
 411             /* Set the section start address. */
 412             g->start = (pend + g->align - 1) & ~(g->align - 1);
 413             g->flags |= START_DEFINED;
 414         }
 415         /* Ugly special case for progbits sections' virtual attributes:
 416          *   If there is a defined valign, but no vstart and no vfollows, then
 417          *   we valign after the previous progbits section.  This case doesn't
 418          *   really make much sense for progbits sections with a defined start
 419          *   address, but it is possible and we must do *something*.
 420          * Not-so-ugly special case:
 421          *   If a progbits section has no virtual attributes, we set the
 422          *   vstart equal to the start address.  */
 423         if (!(g->flags & (VSTART_DEFINED | VFOLLOWS_DEFINED))) {
 424             if (g->flags & VALIGN_DEFINED)
 425                 g->vstart = (pend + g->valign - 1) & ~(g->valign - 1);
 426             else
 427                 g->vstart = g->start;
 428             g->flags |= VSTART_DEFINED;
 429         }
 430         /* Ignore zero-length sections. */
 431         if (g->start < pend)
 432             continue;
 433         /* Compute the span of this section. */
 434         pend = g->start + g->length;
 435         /* Check for section overlap. */
 436         if (s) {
 437             if (g->start > s->start)
 438                 error(ERR_FATAL, "sections %s ~ %s and %s overlap!",
 439                       gs->name, g->name, s->name);
 440             if (pend > s->start)
 441                 error(ERR_FATAL, "sections %s and %s overlap!",
 442                       g->name, s->name);
 443         }
 444         /* Remember this section as the latest >0 length section. */
 445         gs = g;
 446     }
 447
 448     /* Step 4: Compute vstart addresses for all sections. */
 449
 450     /* Attach the nobits sections to the end of the progbits sections. */
 451     for (s = sections; s->next; s = s->next) ;
 452     s->next = nobits;
 453     last_progbits = s;
 454     /* Scan for sections that don't have a vstart address.  If we find one we'll
 455      * attempt to compute its vstart.  If we can't compute the vstart, we leave
 456      * it alone and come back to it in a subsequent scan.  We continue scanning
 457      * and re-scanning until we've gone one full cycle without computing any
 458      * vstarts. */
 459     do {                        /* Do one full scan of the sections list. */
 460         for (h = 0, g = sections; g; g = g->next) {
 461             if (g->flags & VSTART_DEFINED)
 462                 continue;
 463             /* Find the section that this one virtually follows.  */
 464             if (g->flags & VFOLLOWS_DEFINED) {
 465                 for (s = sections; s && strcmp(g->vfollows, s->name);
 466                      s = s->next) ;
 467                 if (!s)
 468                     error(ERR_FATAL,
 469                           "section %s vfollows unknown section (%s)",
 470                           g->name, g->vfollows);
 471             } else if (g->ifollows != NULL)
 472                 for (s = sections; s && (s != g->ifollows); s = s->next) ;
 473             /* The .bss section is the only one with ifollows = NULL.  In this case we
 474              * implicitly follow the last progbits section.  */
 475             else
 476                 s = last_progbits;
 477
 478             /* If the section we're following has a vstart, we can proceed. */
 479             if (s->flags & VSTART_DEFINED) {    /* Default to virtual alignment of four. */
 480                 if (!(g->flags & VALIGN_DEFINED)) {
 481                     g->valign = 4;
 482                     g->flags |= VALIGN_DEFINED;
 483                 }
 484                 /* Compute the vstart address. */
 485                 g->vstart =
 486                     (s->vstart + s->length + g->valign - 1) & ~(g->valign -
 487                                                                 1);
 488                g->flags |= VSTART_DEFINED;
 489                 h++;
 490                 /* Start and vstart mean the same thing for nobits sections. */
 491                 if (g->flags & TYPE_NOBITS)
 492                     g->start = g->vstart;
 493             }
 494         }
 495     } while (h);
 496
 497     /* Now check for any circular vfollows references, which will manifest
 498      * themselves as sections without a defined vstart. */
 499     for (h = 0, s = sections; s; s = s->next) {
 500         if (!(s->flags & VSTART_DEFINED)) {     /* Non-fatal errors after assembly has completed are generally a
 501                                                  * no-no, but we'll throw a fatal one eventually so it's ok.  */
 502             error(ERR_NONFATAL, "cannot compute vstart for section %s",
 503                   s->name);
 504             h++;
 505         }
 506     }
 507     if (h)
 508         error(ERR_FATAL, "circular vfollows path detected");
 509
 510 #ifdef DEBUG
 511     fprintf(stdout,
 512             "bin_cleanup: Confirm final section order for output file:\n");
 513     for (h = 0, s = sections; s && (s->flags & TYPE_PROGBITS);
 514          h++, s = s->next)
 515         fprintf(stdout, "%i. %s\n", h, s->name);
 516 #endif
 517
 518     /* Step 5: Apply relocations. */
 519
 520     /* Prepare the sections for relocating. */
 521     for (s = sections; s; s = s->next)
 522         saa_rewind(s->contents);
 523     /* Apply relocations. */
 524     for (r = relocs; r; r = r->next) {
 525         uint8_t *p, *q, mydata[8];
 526         int64_t l;
 527
 528         saa_fread(r->target->contents, r->posn, mydata, r->bytes);
 529         p = q = mydata;
 530         l = *p++;
 531
 532         if (r->bytes > 1) {
 533             l += ((int64_t)*p++) << 8;
 534             if (r->bytes >= 4) {
 535                 l += ((int64_t)*p++) << 16;
 536                 l += ((int64_t)*p++) << 24;
 537             }
 538             if (r->bytes == 8) {
 539                 l += ((int64_t)*p++) << 32;
 540                 l += ((int64_t)*p++) << 40;
 541                 l += ((int64_t)*p++) << 48;
 542                 l += ((int64_t)*p++) << 56;
 543             }
 544         }
 545
 546         s = find_section_by_index(r->secref);
 547         if (s) {
 548             if (r->secref == s->start_index)
 549                 l += s->start;
 550             else
 551                 l += s->vstart;
 552         }
 553         s = find_section_by_index(r->secrel);
 554         if (s) {
 555             if (r->secrel == s->start_index)
 556                 l -= s->start;
 557             else
 558                 l -= s->vstart;
 559         }
 560
 561         if (r->bytes >= 4)
 562             WRITEDLONG(q, l);
 563         else if (r->bytes == 2)
 564             WRITESHORT(q, l);
 565         else
 566             *q++ = (uint8_t)(l & 0xFF);
 567         saa_fwrite(r->target->contents, r->posn, mydata, r->bytes);
 568     }
 569
 570     /* Step 6: Write the section data to the output file. */
 571
 572     /* Write the progbits sections to the output file. */
 573     for (pend = origin, s = sections; s && (s->flags & TYPE_PROGBITS); s = s->next) {   /* Skip zero-length sections. */
 574         if (s->length == 0)
 575             continue;
 576         /* Pad the space between sections. */
 577         for (h = s->start - pend; h; h--)
 578             fputc('\0', fp);
 579         /* Write the section to the output file. */
 580         if (s->length > 0)
 581             saa_fpwrite(s->contents, fp);
 582         pend = s->start + s->length;
 583     }
 584     /* Done writing the file, so close it. */
 585     fclose(fp);
 586
 587     /* Step 7: Generate the map file. */
 588
 589     if (map_control) {
 590         const char *not_defined = { "not defined" };
 591
 592         /* Display input and output file names. */
 593         fprintf(rf, "\n- NASM Map file ");
 594         for (h = 63; h; h--)
 595             fputc('-', rf);
 596         fprintf(rf, "\n\nSource file:  %s\nOutput file:  %s\n\n",
 597                 infile, outfile);
 598
 599         if (map_control & MAP_ORIGIN) { /* Display program origin. */
 600             fprintf(rf, "-- Program origin ");
 601             for (h = 61; h; h--)
 602                 fputc('-', rf);
 603             fprintf(rf, "\n\n%08"PRIX64"\n\n", origin);
 604         }
 605         /* Display sections summary. */
 606         if (map_control & MAP_SUMMARY) {
 607             fprintf(rf, "-- Sections (summary) ");
 608             for (h = 57; h; h--)
 609                 fputc('-', rf);
 610             fprintf(rf, "\n\nVstart            Start             Stop              "
 611                     "Length    Class     Name\n");
 612             for (s = sections; s; s = s->next) {
 613                 fprintf(rf, "%16"PRIX64"  %16"PRIX64"  %16"PRIX64"  %08"PRIX64"  ",
 614                         s->vstart, s->start, s->start + s->length,
 615                         s->length);
 616                 if (s->flags & TYPE_PROGBITS)
 617                     fprintf(rf, "progbits  ");
 618                 else
 619                     fprintf(rf, "nobits    ");
 620                 fprintf(rf, "%s\n", s->name);
 621             }
 622             fprintf(rf, "\n");
 623         }
 624         /* Display detailed section information. */
 625         if (map_control & MAP_SECTIONS) {
 626             fprintf(rf, "-- Sections (detailed) ");
 627             for (h = 56; h; h--)
 628                 fputc('-', rf);
 629             fprintf(rf, "\n\n");
 630             for (s = sections; s; s = s->next) {
 631                 fprintf(rf, "---- Section %s ", s->name);
 632                 for (h = 65 - strlen(s->name); h; h--)
 633                     fputc('-', rf);
 634                 fprintf(rf, "\n\nclass:     ");
 635                 if (s->flags & TYPE_PROGBITS)
 636                     fprintf(rf, "progbits");
 637                 else
 638                     fprintf(rf, "nobits");
 639                 fprintf(rf, "\nlength:    %16"PRIX64"\nstart:     %16"PRIX64""
 640                         "\nalign:     ", s->length, s->start);
 641                 if (s->flags & ALIGN_DEFINED)
 642                     fprintf(rf, "%16"PRIX64"", s->align);
 643                 else
 644                     fprintf(rf, not_defined);
 645                 fprintf(rf, "\nfollows:   ");
 646                 if (s->flags & FOLLOWS_DEFINED)
 647                     fprintf(rf, "%s", s->follows);
 648                 else
 649                     fprintf(rf, not_defined);
 650                 fprintf(rf, "\nvstart:    %16"PRIX64"\nvalign:    ", s->vstart);
 651                 if (s->flags & VALIGN_DEFINED)
 652                     fprintf(rf, "%16"PRIX64"", s->valign);
 653                 else
 654                     fprintf(rf, not_defined);
 655                 fprintf(rf, "\nvfollows:  ");
 656                 if (s->flags & VFOLLOWS_DEFINED)
 657                     fprintf(rf, "%s", s->vfollows);
 658                 else
 659                     fprintf(rf, not_defined);
 660                 fprintf(rf, "\n\n");
 661             }
 662         }
 663         /* Display symbols information. */
 664         if (map_control & MAP_SYMBOLS) {
 665             int32_t segment, offset;
 666
 667             fprintf(rf, "-- Symbols ");
 668             for (h = 68; h; h--)
 669                 fputc('-', rf);
 670             fprintf(rf, "\n\n");
 671             if (no_seg_labels) {
 672                 fprintf(rf, "---- No Section ");
 673                 for (h = 63; h; h--)
 674                     fputc('-', rf);
 675                 fprintf(rf, "\n\nValue     Name\n");
 676                 for (l = no_seg_labels; l; l = l->next) {
 677                     lookup_label(l->name, &segment, &offset);
 678                     fprintf(rf, "%08"PRIX32"  %s\n", offset, l->name);
 679                 }
 680                 fprintf(rf, "\n\n");
 681             }
 682             for (s = sections; s; s = s->next) {
 683                 if (s->labels) {
 684                     fprintf(rf, "---- Section %s ", s->name);
 685                     for (h = 65 - strlen(s->name); h; h--)
 686                         fputc('-', rf);
 687                     fprintf(rf, "\n\nReal              Virtual           Name\n");
 688                     for (l = s->labels; l; l = l->next) {
 689                         lookup_label(l->name, &segment, &offset);
 690                         fprintf(rf, "%16"PRIX64"  %16"PRIX64"  %s\n",
 691                                 s->start + offset, s->vstart + offset,
 692                                 l->name);
 693                     }
 694                     fprintf(rf, "\n");
 695                 }
 696             }
 697         }
 698     }
 699
 700     /* Close the report file. */
 701     if (map_control && (rf != stdout) && (rf != stderr))
 702         fclose(rf);
 703
 704     /* Step 8: Release all allocated memory. */
 705
 706     /* Free sections, label pointer structs, etc.. */
 707     while (sections) {
 708         s = sections;
 709         sections = s->next;
 710         saa_free(s->contents);
 711         nasm_free(s->name);
 712         if (s->flags & FOLLOWS_DEFINED)
 713             nasm_free(s->follows);
 714         if (s->flags & VFOLLOWS_DEFINED)
 715             nasm_free(s->vfollows);
 716         while (s->labels) {
 717             l = s->labels;
 718             s->labels = l->next;
 719             nasm_free(l);
 720         }
 721         nasm_free(s);
 722     }
 723
 724     /* Free no-section labels. */
 725     while (no_seg_labels) {
 726         l = no_seg_labels;
 727         no_seg_labels = l->next;
 728         nasm_free(l);
 729     }
 730
 731     /* Free relocation structures. */
 732     while (relocs) {
 733         r = relocs->next;
 734         nasm_free(relocs);
 735         relocs = r;
 736     }
 737 }
 738
 739 static void bin_out(int32_t segto, const void *data, uint32_t type,
 740                     int32_t segment, int32_t wrt)
 741 {
 742     uint8_t *p, mydata[8];
 743     struct Section *s;
 744     int32_t realbytes;
 745
 746
 747     if (wrt != NO_SEG) {
 748         wrt = NO_SEG;           /* continue to do _something_ */
 749         error(ERR_NONFATAL, "WRT not supported by binary output format");
 750     }
 751
 752     /* Handle absolute-assembly (structure definitions). */
 753     if (segto == NO_SEG) {
 754         if ((type & OUT_TYPMASK) != OUT_RESERVE)
 755             error(ERR_NONFATAL, "attempt to assemble code in"
 756                   " [ABSOLUTE] space");
 757         return;
 758     }
 759
 760     /* Find the segment we are targeting. */
 761     s = find_section_by_index(segto);
 762     if (!s)
 763         error(ERR_PANIC, "code directed to nonexistent segment?");
 764
 765     /* "Smart" section-type adaptation code. */
 766     if (!(s->flags & TYPE_DEFINED)) {
 767         if ((type & OUT_TYPMASK) == OUT_RESERVE)
 768             s->flags |= TYPE_DEFINED | TYPE_NOBITS;
 769         else
 770             s->flags |= TYPE_DEFINED | TYPE_PROGBITS;
 771     }
 772
 773     if ((s->flags & TYPE_NOBITS) && ((type & OUT_TYPMASK) != OUT_RESERVE))
 774         error(ERR_WARNING, "attempt to initialize memory in a"
 775               " nobits section: ignored");
 776
 777     if ((type & OUT_TYPMASK) == OUT_ADDRESS) {
 778         if (segment != NO_SEG && !find_section_by_index(segment)) {
 779             if (segment % 2)
 780                 error(ERR_NONFATAL, "binary output format does not support"
 781                       " segment base references");
 782             else
 783                 error(ERR_NONFATAL, "binary output format does not support"
 784                       " external references");
 785             segment = NO_SEG;
 786         }
 787         if (s->flags & TYPE_PROGBITS) {
 788             if (segment != NO_SEG)
 789                 add_reloc(s, type & OUT_SIZMASK, segment, -1L);
 790             p = mydata;
 791             if ((type & OUT_SIZMASK) == 4)
 792                 WRITELONG(p, *(int32_t *)data);
 793             else if ((type & OUT_SIZMASK) == 8)
 794                 WRITEDLONG(p, *(int64_t *)data);
 795             else
 796                 WRITESHORT(p, *(int32_t *)data);
 797             saa_wbytes(s->contents, mydata, type & OUT_SIZMASK);
 798         }
 799         s->length += type & OUT_SIZMASK;
 800     } else if ((type & OUT_TYPMASK) == OUT_RAWDATA) {
 801         type &= OUT_SIZMASK;
 802         if (s->flags & TYPE_PROGBITS)
 803             saa_wbytes(s->contents, data, type);
 804         s->length += type;
 805     } else if ((type & OUT_TYPMASK) == OUT_RESERVE) {
 806         type &= OUT_SIZMASK;
 807         if (s->flags & TYPE_PROGBITS) {
 808             error(ERR_WARNING, "uninitialized space declared in"
 809                   " %s section: zeroing", s->name);
 810             saa_wbytes(s->contents, NULL, type);
 811         }
 812         s->length += type;
 813     } else if ((type & OUT_TYPMASK) == OUT_REL2ADR ||
 814                (type & OUT_TYPMASK) == OUT_REL4ADR) {
 815         realbytes = (type & OUT_TYPMASK);
 816         if (realbytes == OUT_REL2ADR)
 817             realbytes = 2;
 818         else
 819             realbytes = 4;
 820         if (segment != NO_SEG && !find_section_by_index(segment)) {
 821             if (segment % 2)
 822                 error(ERR_NONFATAL, "binary output format does not support"
 823                       " segment base references");
 824             else
 825                 error(ERR_NONFATAL, "binary output format does not support"
 826                       " external references");
 827             segment = NO_SEG;
 828         }
 829         if (s->flags & TYPE_PROGBITS) {
 830             add_reloc(s, realbytes, segment, segto);
 831             p = mydata;
 832             if (realbytes == 4)
 833                 WRITELONG(p, *(int32_t *)data - realbytes - s->length);
 834             else
 835                 WRITESHORT(p, *(int32_t *)data - realbytes - s->length);
 836             saa_wbytes(s->contents, mydata, realbytes);
 837         }
 838         s->length += realbytes;
 839     }
 840 }
 841
 842 static void bin_deflabel(char *name, int32_t segment, int32_t offset,
 843                          int is_global, char *special)
 844 {
 845     (void)segment;              /* Don't warn that this parameter is unused */
 846     (void)offset;               /* Don't warn that this parameter is unused */
 847
 848     if (special)
 849         error(ERR_NONFATAL, "binary format does not support any"
 850               " special symbol types");
 851     else if (name[0] == '.' && name[1] == '.' && name[2] != '@')
 852         error(ERR_NONFATAL, "unrecognised special symbol `%s'", name);
 853     else if (is_global == 2)
 854         error(ERR_NONFATAL, "binary output format does not support common"
 855               " variables");
 856     else {
 857         struct Section *s;
 858         struct bin_label ***ltp;
 859
 860         /* Remember label definition so we can look it up later when
 861          * creating the map file. */
 862         s = find_section_by_index(segment);
 863         if (s)
 864             ltp = &(s->labels_end);
 865         else
 866             ltp = &nsl_tail;
 867         (**ltp) = nasm_malloc(sizeof(struct bin_label));
 868         (**ltp)->name = name;
 869         (**ltp)->next = NULL;
 870         *ltp = &((**ltp)->next);
 871     }
 872
 873 }
 874
 875 /* These constants and the following function are used
 876  * by bin_secname() to parse attribute assignments. */
 877
 878 enum { ATTRIB_START, ATTRIB_ALIGN, ATTRIB_FOLLOWS,
 879     ATTRIB_VSTART, ATTRIB_VALIGN, ATTRIB_VFOLLOWS,
 880     ATTRIB_NOBITS, ATTRIB_PROGBITS
 881 };
 882
 883 static int bin_read_attribute(char **line, int *attribute,
 884                               uint64_t *value)
 885 {
 886     expr *e;
 887     int attrib_name_size;
 888     struct tokenval tokval;
 889     char *exp;
 890
 891     /* Skip whitespace. */
 892     while (**line && isspace(**line))
 893         (*line)++;
 894     if (!**line)
 895         return 0;
 896
 897     /* Figure out what attribute we're reading. */
 898     if (!nasm_strnicmp(*line, "align=", 6)) {
 899         *attribute = ATTRIB_ALIGN;
 900         attrib_name_size = 6;
 901     } else if (format_mode) {
 902         if (!nasm_strnicmp(*line, "start=", 6)) {
 903             *attribute = ATTRIB_START;
 904             attrib_name_size = 6;
 905         } else if (!nasm_strnicmp(*line, "follows=", 8)) {
 906             *attribute = ATTRIB_FOLLOWS;
 907             *line += 8;
 908             return 1;
 909         } else if (!nasm_strnicmp(*line, "vstart=", 7)) {
 910             *attribute = ATTRIB_VSTART;
 911             attrib_name_size = 7;
 912         } else if (!nasm_strnicmp(*line, "valign=", 7)) {
 913             *attribute = ATTRIB_VALIGN;
 914             attrib_name_size = 7;
 915         } else if (!nasm_strnicmp(*line, "vfollows=", 9)) {
 916             *attribute = ATTRIB_VFOLLOWS;
 917             *line += 9;
 918             return 1;
 919         } else if (!nasm_strnicmp(*line, "nobits", 6) &&
 920                    (isspace((*line)[6]) || ((*line)[6] == '\0'))) {
 921             *attribute = ATTRIB_NOBITS;
 922             *line += 6;
 923             return 1;
 924         } else if (!nasm_strnicmp(*line, "progbits", 8) &&
 925                    (isspace((*line)[8]) || ((*line)[8] == '\0'))) {
 926             *attribute = ATTRIB_PROGBITS;
 927             *line += 8;
 928             return 1;
 929         } else
 930             return 0;
 931     } else
 932         return 0;
 933
 934     /* Find the end of the expression. */
 935     if ((*line)[attrib_name_size] != '(') {
 936         /* Single term (no parenthesis). */
 937         exp = *line += attrib_name_size;
 938         while (**line && !isspace(**line))
 939             (*line)++;
 940         if (**line) {
 941             **line = '\0';
 942             (*line)++;
 943         }
 944     } else {
 945         char c;
 946         int pcount = 1;
 947
 948         /* Full expression (delimited by parenthesis) */
 949         exp = *line += attrib_name_size + 1;
 950         while (1) {
 951             (*line) += strcspn(*line, "()'\"");
 952             if (**line == '(') {
 953                 ++(*line);
 954                 ++pcount;
 955             }
 956             if (**line == ')') {
 957                 ++(*line);
 958                 --pcount;
 959                 if (!pcount)
 960                     break;
 961             }
 962             if ((**line == '"') || (**line == '\'')) {
 963                 c = **line;
 964                 while (**line) {
 965                     ++(*line);
 966                     if (**line == c)
 967                         break;
 968                 }
 969                 if (!**line) {
 970                     error(ERR_NONFATAL,
 971                           "invalid syntax in `section' directive");
 972                     return -1;
 973                 }
 974                 ++(*line);
 975             }
 976             if (!**line) {
 977                 error(ERR_NONFATAL, "expecting `)'");
 978                 return -1;
 979             }
 980         }
 981         *(*line - 1) = '\0';    /* Terminate the expression. */
 982     }
 983
 984     /* Check for no value given. */
 985     if (!*exp) {
 986         error(ERR_WARNING, "No value given to attribute in"
 987               " `section' directive");
 988         return -1;
 989     }
 990
 991     /* Read and evaluate the expression. */
 992     stdscan_reset();
 993     stdscan_bufptr = exp;
 994     tokval.t_type = TOKEN_INVALID;
 995     e = evaluate(stdscan, NULL, &tokval, NULL, 1, error, NULL);
 996     if (e) {
 997         if (!is_really_simple(e)) {
 998             error(ERR_NONFATAL, "section attribute value must be"
 999                   " a critical expression");
1000             return -1;
1001         }
1002     } else {
1003         error(ERR_NONFATAL, "Invalid attribute value"
1004               " specified in `section' directive.");
1005         return -1;
1006     }
1007     *value = (uint64_t)reloc_value(e);
1008     return 1;
1009 }
1010
1011 static void bin_assign_attributes(struct Section *sec, char *astring)
1012 {
1013     int attribute, check;
1014     uint64_t value;
1015     char *p;
1016
1017     while (1) {                 /* Get the next attribute. */
1018         check = bin_read_attribute(&astring, &attribute, &value);
1019         /* Skip bad attribute. */
1020         if (check == -1)
1021             continue;
1022         /* Unknown section attribute, so skip it and warn the user. */
1023         if (!check) {
1024             if (!*astring)
1025                 break;          /* End of line. */
1026             else {
1027                 p = astring;
1028                 while (*astring && !isspace(*astring))
1029                     astring++;
1030                 if (*astring) {
1031                     *astring = '\0';
1032                     astring++;
1033                 }
1034                 error(ERR_WARNING, "ignoring unknown section attribute:"
1035                       " \"%s\"", p);
1036             }
1037             continue;
1038         }
1039
1040         switch (attribute) {    /* Handle nobits attribute. */
1041         case ATTRIB_NOBITS:
1042             if ((sec->flags & TYPE_DEFINED)
1043                 && (sec->flags & TYPE_PROGBITS))
1044                 error(ERR_NONFATAL,
1045                       "attempt to change section type"
1046                       " from progbits to nobits");
1047             else
1048                 sec->flags |= TYPE_DEFINED | TYPE_NOBITS;
1049             continue;
1050
1051             /* Handle progbits attribute. */
1052         case ATTRIB_PROGBITS:
1053             if ((sec->flags & TYPE_DEFINED) && (sec->flags & TYPE_NOBITS))
1054                 error(ERR_NONFATAL, "attempt to change section type"
1055                       " from nobits to progbits");
1056             else
1057                 sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
1058             continue;
1059
1060             /* Handle align attribute. */
1061         case ATTRIB_ALIGN:
1062             if (!format_mode && (!strcmp(sec->name, ".text")))
1063                 error(ERR_NONFATAL, "cannot specify an alignment"
1064                       " to the .text section");
1065             else {
1066                 if (!value || ((value - 1) & value))
1067                     error(ERR_NONFATAL, "argument to `align' is not a"
1068                           " power of two");
1069                 else {          /* Alignment is already satisfied if the previous
1070                                  * align value is greater. */
1071                     if ((sec->flags & ALIGN_DEFINED)
1072                         && (value < sec->align))
1073                         value = sec->align;
1074
1075                     /* Don't allow a conflicting align value. */
1076                     if ((sec->flags & START_DEFINED)
1077                         && (sec->start & (value - 1)))
1078                         error(ERR_NONFATAL,
1079                               "`align' value conflicts "
1080                               "with section start address");
1081                     else {
1082                         sec->align = value;
1083                         sec->flags |= ALIGN_DEFINED;
1084                     }
1085                 }
1086             }
1087             continue;
1088
1089             /* Handle valign attribute. */
1090         case ATTRIB_VALIGN:
1091             if (!value || ((value - 1) & value))
1092                 error(ERR_NONFATAL, "argument to `valign' is not a"
1093                       " power of two");
1094             else {              /* Alignment is already satisfied if the previous
1095                                  * align value is greater. */
1096                 if ((sec->flags & VALIGN_DEFINED) && (value < sec->valign))
1097                     value = sec->valign;
1098
1099                 /* Don't allow a conflicting valign value. */
1100                 if ((sec->flags & VSTART_DEFINED)
1101                     && (sec->vstart & (value - 1)))
1102                     error(ERR_NONFATAL,
1103                           "`valign' value conflicts "
1104                           "with `vstart' address");
1105                 else {
1106                     sec->valign = value;
1107                     sec->flags |= VALIGN_DEFINED;
1108                 }
1109             }
1110             continue;
1111
1112             /* Handle start attribute. */
1113         case ATTRIB_START:
1114             if (sec->flags & FOLLOWS_DEFINED)
1115                 error(ERR_NONFATAL, "cannot combine `start' and `follows'"
1116                       " section attributes");
1117             else if ((sec->flags & START_DEFINED) && (value != sec->start))
1118                 error(ERR_NONFATAL, "section start address redefined");
1119             else {
1120                 sec->start = value;
1121                 sec->flags |= START_DEFINED;
1122                 if (sec->flags & ALIGN_DEFINED) {
1123                     if (sec->start & (sec->align - 1))
1124                         error(ERR_NONFATAL, "`start' address conflicts"
1125                               " with section alignment");
1126                     sec->flags ^= ALIGN_DEFINED;
1127                 }
1128             }
1129             continue;
1130
1131             /* Handle vstart attribute. */
1132         case ATTRIB_VSTART:
1133             if (sec->flags & VFOLLOWS_DEFINED)
1134                 error(ERR_NONFATAL,
1135                       "cannot combine `vstart' and `vfollows'"
1136                       " section attributes");
1137             else if ((sec->flags & VSTART_DEFINED)
1138                      && (value != sec->vstart))
1139                 error(ERR_NONFATAL,
1140                       "section virtual start address"
1141                       " (vstart) redefined");
1142             else {
1143                 sec->vstart = value;
1144                 sec->flags |= VSTART_DEFINED;
1145                 if (sec->flags & VALIGN_DEFINED) {
1146                     if (sec->vstart & (sec->valign - 1))
1147                         error(ERR_NONFATAL, "`vstart' address conflicts"
1148                               " with `valign' value");
1149                     sec->flags ^= VALIGN_DEFINED;
1150                 }
1151             }
1152             continue;
1153
1154             /* Handle follows attribute. */
1155         case ATTRIB_FOLLOWS:
1156             p = astring;
1157             astring += strcspn(astring, " \t");
1158             if (astring == p)
1159                 error(ERR_NONFATAL, "expecting section name for `follows'"
1160                       " attribute");
1161             else {
1162                 *(astring++) = '\0';
1163                 if (sec->flags & START_DEFINED)
1164                     error(ERR_NONFATAL,
1165                           "cannot combine `start' and `follows'"
1166                           " section attributes");
1167                 sec->follows = nasm_strdup(p);
1168                 sec->flags |= FOLLOWS_DEFINED;
1169             }
1170             continue;
1171
1172             /* Handle vfollows attribute. */
1173         case ATTRIB_VFOLLOWS:
1174             if (sec->flags & VSTART_DEFINED)
1175                 error(ERR_NONFATAL,
1176                       "cannot combine `vstart' and `vfollows'"
1177                       " section attributes");
1178             else {
1179                 p = astring;
1180                 astring += strcspn(astring, " \t");
1181                 if (astring == p)
1182                     error(ERR_NONFATAL,
1183                           "expecting section name for `vfollows'"
1184                           " attribute");
1185                 else {
1186                     *(astring++) = '\0';
1187                     sec->vfollows = nasm_strdup(p);
1188                     sec->flags |= VFOLLOWS_DEFINED;
1189                 }
1190             }
1191             continue;
1192         }
1193     }
1194 }
1195
1196 static void bin_define_section_labels(void)
1197 {
1198     static int labels_defined = 0;
1199     struct Section *sec;
1200     char *label_name;
1201     size_t base_len;
1202
1203     if (labels_defined)
1204         return;
1205     for (sec = sections; sec; sec = sec->next) {
1206         base_len = strlen(sec->name) + 8;
1207         label_name = nasm_malloc(base_len + 8);
1208         strcpy(label_name, "section.");
1209         strcpy(label_name + 8, sec->name);
1210
1211         /* section.<name>.start */
1212         strcpy(label_name + base_len, ".start");
1213         define_label(label_name, sec->start_index, 0L,
1214                      NULL, 0, 0, bin_get_ofmt(), error);
1215
1216         /* section.<name>.vstart */
1217         strcpy(label_name + base_len, ".vstart");
1218         define_label(label_name, sec->vstart_index, 0L,
1219                      NULL, 0, 0, bin_get_ofmt(), error);
1220
1221         nasm_free(label_name);
1222     }
1223     labels_defined = 1;
1224 }
1225
1226 static int32_t bin_secname(char *name, int pass, int *bits)
1227 {
1228     char *p;
1229     struct Section *sec;
1230
1231     /* bin_secname is called with *name = NULL at the start of each
1232      * pass.  Use this opportunity to establish the default section
1233      * (default is BITS-16 ".text" segment).
1234      */
1235     if (!name) {                /* Reset ORG and section attributes at the start of each pass. */
1236         origin_defined = 0;
1237         for (sec = sections; sec; sec = sec->next)
1238             sec->flags &= ~(START_DEFINED | VSTART_DEFINED |
1239                             ALIGN_DEFINED | VALIGN_DEFINED);
1240
1241         /* Define section start and vstart labels. */
1242         if (format_mode && (pass != 1))
1243             bin_define_section_labels();
1244
1245         /* Establish the default (.text) section. */
1246         *bits = 16;
1247         sec = find_section_by_name(".text");
1248         sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
1249         current_section = sec->vstart_index;
1250         return current_section;
1251     }
1252
1253     /* Attempt to find the requested section.  If it does not
1254      * exist, create it. */
1255     p = name;
1256     while (*p && !isspace(*p))
1257         p++;
1258     if (*p)
1259         *p++ = '\0';
1260     sec = find_section_by_name(name);
1261     if (!sec) {
1262         sec = create_section(name);
1263         if (!strcmp(name, ".data"))
1264             sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
1265         else if (!strcmp(name, ".bss")) {
1266             sec->flags |= TYPE_DEFINED | TYPE_NOBITS;
1267             sec->ifollows = NULL;
1268         } else if (!format_mode) {
1269             error(ERR_NONFATAL, "section name must be "
1270                   ".text, .data, or .bss");
1271             return current_section;
1272         }
1273     }
1274
1275     /* Handle attribute assignments. */
1276     if (pass != 1)
1277         bin_assign_attributes(sec, p);
1278
1279 #ifndef ABIN_SMART_ADAPT
1280     /* The following line disables smart adaptation of
1281      * PROGBITS/NOBITS section types (it forces sections to
1282      * default to PROGBITS). */
1283     if ((pass != 1) && !(sec->flags & TYPE_DEFINED))
1284         sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
1285 #endif
1286
1287     /* Set the current section and return. */
1288     current_section = sec->vstart_index;
1289     return current_section;
1290 }
1291
1292 static int bin_directive(char *directive, char *args, int pass)
1293 {
1294     /* Handle ORG directive */
1295     if (!nasm_stricmp(directive, "org")) {
1296         struct tokenval tokval;
1297         uint64_t value;
1298         expr *e;
1299
1300         stdscan_reset();
1301         stdscan_bufptr = args;
1302         tokval.t_type = TOKEN_INVALID;
1303         e = evaluate(stdscan, NULL, &tokval, NULL, 1, error, NULL);
1304         if (e) {
1305             if (!is_really_simple(e))
1306                 error(ERR_NONFATAL, "org value must be a critical"
1307                       " expression");
1308             else {
1309                 value = reloc_value(e);
1310                 /* Check for ORG redefinition. */
1311                 if (origin_defined && (value != origin))
1312                     error(ERR_NONFATAL, "program origin redefined");
1313                 else {
1314                     origin = value;
1315                     origin_defined = 1;
1316                 }
1317             }
1318         } else
1319             error(ERR_NONFATAL, "No or invalid offset specified"
1320                   " in ORG directive.");
1321         return 1;
1322     }
1323
1324     /* The 'map' directive allows the user to generate section
1325      * and symbol information to stdout, stderr, or to a file. */
1326     else if (format_mode && !nasm_stricmp(directive, "map")) {
1327         char *p;
1328
1329         if (pass != 1)
1330             return 1;
1331         args += strspn(args, " \t");
1332         while (*args) {
1333             p = args;
1334             args += strcspn(args, " \t");
1335             if (*args != '\0')
1336                 *(args++) = '\0';
1337             if (!nasm_stricmp(p, "all"))
1338                 map_control |=
1339                     MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS | MAP_SYMBOLS;
1340             else if (!nasm_stricmp(p, "brief"))
1341                 map_control |= MAP_ORIGIN | MAP_SUMMARY;
1342             else if (!nasm_stricmp(p, "sections"))
1343                 map_control |= MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS;
1344             else if (!nasm_stricmp(p, "segments"))
1345                 map_control |= MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS;
1346             else if (!nasm_stricmp(p, "symbols"))
1347                 map_control |= MAP_SYMBOLS;
1348             else if (!rf) {
1349                 if (!nasm_stricmp(p, "stdout"))
1350                     rf = stdout;
1351                 else if (!nasm_stricmp(p, "stderr"))
1352                     rf = stderr;
1353                 else {          /* Must be a filename. */
1354                     rf = fopen(p, "wt");
1355                     if (!rf) {
1356                         error(ERR_WARNING, "unable to open map file `%s'",
1357                               p);
1358                         map_control = 0;
1359                         return 1;
1360                     }
1361                 }
1362             } else
1363                 error(ERR_WARNING, "map file already specified");
1364         }
1365         if (map_control == 0)
1366             map_control |= MAP_ORIGIN | MAP_SUMMARY;
1367         if (!rf)
1368             rf = stdout;
1369         return 1;
1370     }
1371     return 0;
1372 }
1373
1374 static void bin_filename(char *inname, char *outname, efunc error)
1375 {
1376     standard_extension(inname, outname, "", error);
1377     infile = inname;
1378     outfile = outname;
1379 }
1380
1381 static int32_t bin_segbase(int32_t segment)
1382 {
1383     return segment;
1384 }
1385
1386 static int bin_set_info(enum geninfo type, char **val)
1387 {
1388     (void)type;
1389     (void)val;
1390     return 0;
1391 }
1392
1393 static void bin_init(FILE * afp, efunc errfunc, ldfunc ldef, evalfunc eval)
1394 {
1395     fp = afp;
1396     error = errfunc;
1397
1398     (void)eval;                 /* Don't warn that this parameter is unused. */
1399     (void)ldef;                 /* Placate optimizers. */
1400
1401     maxbits = 64;               /* Support 64-bit Segments */
1402     relocs = NULL;
1403     reloctail = &relocs;
1404     origin_defined = 0;
1405     no_seg_labels = NULL;
1406     nsl_tail = &no_seg_labels;
1407     format_mode = 1;            /* Extended bin format
1408                                  * (set this to zero for old bin format). */
1409
1410     /* Create default section (.text). */
1411     sections = last_section = nasm_malloc(sizeof(struct Section));
1412     last_section->next = NULL;
1413     last_section->name = nasm_strdup(".text");
1414     last_section->contents = saa_init(1L);
1415     last_section->follows = last_section->vfollows = 0;
1416     last_section->ifollows = NULL;
1417     last_section->length = 0;
1418     last_section->flags = TYPE_DEFINED | TYPE_PROGBITS;
1419     last_section->labels = NULL;
1420     last_section->labels_end = &(last_section->labels);
1421     last_section->start_index = seg_alloc();
1422     last_section->vstart_index = current_section = seg_alloc();
1423 }
1424
1425 struct ofmt of_bin = {
1426     "flat-form binary files (e.g. DOS .COM, .SYS)",
1427     "bin",
1428     NULL,
1429     null_debug_arr,
1430     &null_debug_form,
1431     bin_stdmac,
1432     bin_init,
1433     bin_set_info,
1434     bin_out,
1435     bin_deflabel,
1436     bin_secname,
1437     bin_segbase,
1438     bin_directive,
1439     bin_filename,
1440     bin_cleanup
1441 };
1442
1443 /* This is needed for bin_define_section_labels() */
1444 struct ofmt *bin_get_ofmt(void)
1445 {
1446     return &of_bin;
1447 }
1448
1449 #endif                          /* #ifdef OF_BIN */