output/codeview.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1996-2016 The NASM Authors - All Rights Reserved
   4  *   See the file AUTHORS included with the NASM distribution for
   5  *   the specific copyright holders.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following
   9  *   conditions are met:
  10  *
  11  *   * Redistributions of source code must retain the above copyright
  12  *     notice, this list of conditions and the following disclaimer.
  13  *   * Redistributions in binary form must reproduce the above
  14  *     copyright notice, this list of conditions and the following
  15  *     disclaimer in the documentation and/or other materials provided
  16  *     with the distribution.
  17  *
  18  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  19  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  30  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * ----------------------------------------------------------------------- */
  33
  34 /*
  35  * codeview.c Codeview Debug Format support for COFF
  36  */
  37
  38 #include "version.h"
  39 #include "compiler.h"
  40
  41 #include <stdio.h>
  42 #include <stddef.h>
  43 #include <stdlib.h>
  44
  45 #include "nasm.h"
  46 #include "nasmlib.h"
  47 #include "preproc.h"
  48 #include "saa.h"
  49 #include "hashtbl.h"
  50 #include "output/outlib.h"
  51 #include "output/pecoff.h"
  52 #include "md5.h"
  53
  54 static void cv8_init(void);
  55 static void cv8_linenum(const char *filename, int32_t linenumber,
  56         int32_t segto);
  57 static void cv8_deflabel(char *name, int32_t segment, int64_t offset,
  58         int is_global, char *special);
  59 static void cv8_typevalue(int32_t type);
  60 static void cv8_output(int type, void *param);
  61 static void cv8_cleanup(void);
  62
  63 struct dfmt df_cv8 = {
  64     "Codeview 8",               /* .fullname */
  65     "cv8",                      /* .shortname */
  66     cv8_init,                   /* .init */
  67     cv8_linenum,                /* .linenum */
  68     cv8_deflabel,               /* .debug_deflabel */
  69     null_debug_directive,       /* .debug_directive */
  70     cv8_typevalue,              /* .debug_typevalue */
  71     cv8_output,                 /* .debug_output */
  72     cv8_cleanup,                /* .cleanup */
  73 };
  74
  75 /*******************************************************************************
  76  * dfmt callbacks
  77  ******************************************************************************/
  78 struct source_file;
  79
  80 struct source_file {
  81     const char *filename;
  82     char *fullname;
  83     uint32_t fullnamelen;
  84
  85     struct source_file *next;
  86
  87     uint32_t filetbl_off;
  88     uint32_t sourcetbl_off;
  89
  90     struct SAA *lines;
  91     uint32_t num_lines;
  92
  93     unsigned char md5sum[MD5_HASHBYTES];
  94 };
  95
  96 struct linepair {
  97     uint32_t file_offset;
  98     uint32_t linenumber;
  99 };
 100
 101 enum symbol_type {
 102     SYMTYPE_CODE,
 103     SYMTYPE_PROC,
 104     SYMTYPE_LDATA,
 105     SYMTYPE_GDATA,
 106
 107     SYMTYPE_MAX
 108 };
 109
 110 struct cv8_symbol {
 111     enum symbol_type type;
 112     char *name;
 113
 114     uint32_t secrel;
 115     uint16_t section;
 116     uint32_t size;
 117     uint32_t typeindex;
 118
 119     enum symtype {
 120         TYPE_UNREGISTERED = 0x0000, /* T_NOTYPE */
 121         TYPE_BYTE = 0x0020,
 122         TYPE_WORD = 0x0021,
 123         TYPE_DWORD= 0x0022,
 124         TYPE_QUAD = 0x0023,
 125
 126         TYPE_REAL32 = 0x0040,
 127         TYPE_REAL64 = 0x0041,
 128         TYPE_REAL80 = 0x0042,
 129         TYPE_REAL128= 0x0043,
 130         TYPE_REAL256= 0x0044,
 131         TYPE_REAL512= 0x0045
 132     } symtype;
 133 };
 134
 135 struct cv8_state {
 136     int symbol_sect;
 137     int type_sect;
 138
 139     uint32_t text_offset;
 140
 141     struct source_file *source_files, **source_files_tail;
 142     const char *last_filename;
 143     struct source_file *last_source_file;
 144     struct hash_table file_hash;
 145     unsigned num_files;
 146     uint32_t total_filename_len;
 147
 148
 149     unsigned total_lines;
 150
 151     struct SAA *symbols;
 152     struct cv8_symbol *last_sym;
 153     unsigned num_syms[SYMTYPE_MAX];
 154     unsigned symbol_lengths;
 155     unsigned total_syms;
 156
 157     char *cwd;
 158 };
 159 struct cv8_state cv8_state;
 160
 161 static void cv8_init(void)
 162 {
 163     const uint32_t sect_flags =     IMAGE_SCN_MEM_READ |
 164                     IMAGE_SCN_MEM_DISCARDABLE |
 165                     IMAGE_SCN_CNT_INITIALIZED_DATA |
 166                     IMAGE_SCN_ALIGN_1BYTES;
 167
 168     cv8_state.symbol_sect = coff_make_section(".debug$S", sect_flags);
 169     cv8_state.type_sect = coff_make_section(".debug$T", sect_flags);
 170
 171     cv8_state.text_offset = 0;
 172
 173     cv8_state.source_files = NULL;
 174     cv8_state.source_files_tail = &cv8_state.source_files;
 175     hash_init(&cv8_state.file_hash, HASH_MEDIUM);
 176
 177     cv8_state.num_files = 0;
 178     cv8_state.total_filename_len = 0;
 179
 180     cv8_state.total_lines = 0;
 181
 182     cv8_state.symbols = saa_init(sizeof(struct cv8_symbol));
 183     cv8_state.last_sym = NULL;
 184
 185     cv8_state.cwd = nasm_realpath(".");
 186 }
 187
 188 static struct source_file *register_file(const char *filename);
 189 static struct coff_Section *find_section(int32_t segto);
 190
 191 static void cv8_linenum(const char *filename, int32_t linenumber,
 192         int32_t segto)
 193 {
 194     struct coff_Section *s;
 195     struct linepair *li;
 196     struct source_file *file;
 197
 198     file = register_file(filename);
 199
 200     s = find_section(segto);
 201     if (s == NULL)
 202         return;
 203
 204     if ((s->flags & IMAGE_SCN_MEM_EXECUTE) == 0)
 205         return;
 206
 207     li = saa_wstruct(file->lines);
 208     li->file_offset = cv8_state.text_offset;
 209     li->linenumber = linenumber;
 210
 211     file->num_lines++;
 212     cv8_state.total_lines++;
 213 }
 214
 215 static void cv8_deflabel(char *name, int32_t segment, int64_t offset,
 216         int is_global, char *special)
 217 {
 218     struct cv8_symbol *sym;
 219     struct coff_Section *s;
 220
 221     (void)special;
 222
 223     s = find_section(segment);
 224     if (s == NULL)
 225         return;
 226
 227     sym = saa_wstruct(cv8_state.symbols);
 228
 229     if (s->flags & IMAGE_SCN_MEM_EXECUTE)
 230         sym->type = is_global ? SYMTYPE_PROC : SYMTYPE_CODE;
 231     else
 232         sym->type = is_global ?  SYMTYPE_GDATA : SYMTYPE_LDATA;
 233     cv8_state.num_syms[sym->type]++;
 234     cv8_state.total_syms++;
 235
 236     sym->section = segment;
 237     sym->secrel = offset;
 238     sym->symtype = TYPE_UNREGISTERED;
 239     sym->size = 0;
 240     sym->typeindex = 0;
 241
 242     sym->name = nasm_strdup(name);
 243     cv8_state.symbol_lengths += strlen(sym->name) + 1;
 244
 245     if (cv8_state.last_sym && cv8_state.last_sym->section == segment)
 246         cv8_state.last_sym->size = offset - cv8_state.last_sym->secrel;
 247     cv8_state.last_sym = sym;
 248 }
 249
 250 static void cv8_typevalue(int32_t type)
 251 {
 252     if (!cv8_state.last_sym)
 253         return;
 254     if (cv8_state.last_sym->symtype != TYPE_UNREGISTERED)
 255         return;
 256
 257     switch (TYM_TYPE(type)) {
 258     case TY_BYTE:
 259         cv8_state.last_sym->symtype = TYPE_BYTE;
 260         break;
 261     case TY_WORD:
 262         cv8_state.last_sym->symtype = TYPE_WORD;
 263         break;
 264     case TY_DWORD:
 265         cv8_state.last_sym->symtype = TYPE_DWORD;
 266         break;
 267     case TY_QWORD:
 268         cv8_state.last_sym->symtype = TYPE_QUAD;
 269         break;
 270     case TY_FLOAT:
 271         cv8_state.last_sym->symtype = TYPE_REAL32;
 272         break;
 273     case TY_TBYTE:
 274         cv8_state.last_sym->symtype = TYPE_REAL80;
 275         break;
 276     case TY_OWORD:
 277         cv8_state.last_sym->symtype = TYPE_REAL128;
 278         break;
 279     case TY_YWORD:
 280         cv8_state.last_sym->symtype = TYPE_REAL256;
 281         break;
 282     case TY_UNKNOWN:
 283         break;
 284     case TY_LABEL:
 285         break;
 286     }
 287 }
 288
 289 static void cv8_output(int type, void *param)
 290 {
 291     struct coff_DebugInfo *dinfo = param;
 292
 293     (void)type;
 294
 295     if (dinfo->section && dinfo->section->name &&
 296     !strncmp(dinfo->section->name, ".text", 5))
 297         cv8_state.text_offset += dinfo->size;
 298 }
 299
 300 static void build_symbol_table(struct coff_Section *const sect);
 301 static void build_type_table(struct coff_Section *const sect);
 302
 303 static void cv8_cleanup(void)
 304 {
 305     struct cv8_symbol *sym;
 306     struct source_file *file;
 307
 308     struct coff_Section *symbol_sect = coff_sects[cv8_state.symbol_sect];
 309     struct coff_Section *type_sect = coff_sects[cv8_state.type_sect];
 310
 311     build_symbol_table(symbol_sect);
 312     build_type_table(type_sect);
 313
 314     list_for_each(file, cv8_state.source_files) {
 315         nasm_free(file->fullname);
 316         saa_free(file->lines);
 317         free(file);
 318     }
 319     hash_free(&cv8_state.file_hash);
 320
 321     if (cv8_state.cwd != NULL)
 322         nasm_free(cv8_state.cwd);
 323
 324     saa_rewind(cv8_state.symbols);
 325     while ((sym = saa_rstruct(cv8_state.symbols)))
 326         nasm_free(sym->name);
 327     saa_free(cv8_state.symbols);
 328 }
 329
 330 /*******************************************************************************
 331  * implementation
 332  ******************************************************************************/
 333 static void calc_md5(const char *const filename,
 334         unsigned char sum[MD5_HASHBYTES])
 335 {
 336     int success = 0;
 337     unsigned char *file_buf;
 338     FILE *f;
 339     MD5_CTX ctx;
 340
 341     f = pp_input_fopen(filename, "rb");
 342     if (!f)
 343         goto done;
 344
 345     file_buf = nasm_zalloc(BUFSIZ);
 346
 347     MD5Init(&ctx);
 348     while (!feof(f)) {
 349         size_t i = fread(file_buf, 1, BUFSIZ, f);
 350         if (ferror(f))
 351             goto done_0;
 352         else if (i == 0)
 353             break;
 354         MD5Update(&ctx, file_buf, i);
 355     }
 356     MD5Final(sum, &ctx);
 357
 358     success = 1;
 359 done_0:
 360     nasm_free(file_buf);
 361     fclose(f);
 362 done:
 363     if (!success) {
 364         nasm_error(ERR_NONFATAL, "unable to hash file %s. "
 365                  "Debug information may be unavailable.\n",
 366                  filename);
 367     }
 368     return;
 369 }
 370
 371 static struct source_file *register_file(const char *filename)
 372 {
 373     struct source_file *file;
 374     void **filep;
 375     char *fullpath;
 376     struct hash_insert hi;
 377
 378     /*
 379      * The common case is that we are invoked with the same filename
 380      * as we were last time.  Make this a pointer comparison: this is
 381      * safe because the NASM core code allocates each filename once
 382      * and never frees it.
 383      */
 384     if (likely(cv8_state.last_filename == filename))
 385         return cv8_state.last_source_file;
 386
 387     cv8_state.last_filename = filename;
 388
 389     filep = hash_find(&cv8_state.file_hash, filename, &hi);
 390     if (likely(filep)) {
 391         file = *filep;
 392     } else {
 393         /* New filename encounter */
 394
 395         fullpath = nasm_realpath(filename);
 396
 397         file = nasm_zalloc(sizeof(*file));
 398
 399         file->filename = filename;
 400         file->fullname = fullpath;
 401         file->fullnamelen = strlen(fullpath);
 402         file->lines = saa_init(sizeof(struct linepair));
 403         *cv8_state.source_files_tail = file;
 404         cv8_state.source_files_tail = &file->next;
 405         calc_md5(fullpath, file->md5sum);
 406
 407         hash_add(&hi, filename, file);
 408
 409         cv8_state.num_files++;
 410         cv8_state.total_filename_len += file->fullnamelen + 1;
 411     }
 412
 413     cv8_state.last_source_file = file;
 414     return file;
 415 }
 416
 417 static struct coff_Section *find_section(int32_t segto)
 418 {
 419     int i;
 420
 421     for (i = 0; i < coff_nsects; i++) {
 422         struct coff_Section *sec;
 423
 424         sec = coff_sects[i];
 425         if (segto == sec->index)
 426             return sec;
 427     }
 428     return NULL;
 429 }
 430
 431 static void register_reloc(struct coff_Section *const sect,
 432         char *sym, uint32_t addr, uint16_t type)
 433 {
 434     struct coff_Reloc *r;
 435     struct coff_Section *sec;
 436
 437     r = *sect->tail = nasm_malloc(sizeof(struct coff_Reloc));
 438     sect->tail = &r->next;
 439     r->next = NULL;
 440     sect->nrelocs++;
 441
 442     r->address = addr;
 443     r->symbase = SECT_SYMBOLS;
 444     r->type = type;
 445
 446     r->symbol = 0;
 447     for (int i = 0; i < coff_nsects; i++) {
 448         sec = coff_sects[i];
 449         if (!strcmp(sym, sec->name)) {
 450             return;
 451         }
 452         r->symbol += 2;
 453     }
 454
 455     saa_rewind(coff_syms);
 456     for (uint32_t i = 0; i < coff_nsyms; i++) {
 457         struct coff_Symbol *s = saa_rstruct(coff_syms);
 458         r->symbol++;
 459         if (s->strpos == -1 && !strcmp(sym, s->name)) {
 460             return;
 461         } else if (s->strpos != -1) {
 462             int res;
 463             char *symname;
 464
 465             symname = nasm_malloc(s->namlen + 1);
 466             saa_fread(coff_strs, s->strpos-4, symname, s->namlen);
 467             symname[s->namlen] = '\0';
 468             res = strcmp(sym, symname);
 469             nasm_free(symname);
 470             if (!res)
 471                 return;
 472         }
 473     }
 474     nasm_panic(0, "codeview: relocation for unregistered symbol: %s", sym);
 475 }
 476
 477 static inline void section_write32(struct coff_Section *sect, uint32_t val)
 478 {
 479     saa_write32(sect->data, val);
 480     sect->len += 4;
 481 }
 482
 483 static inline void section_write16(struct coff_Section *sect, uint16_t val)
 484 {
 485     saa_write16(sect->data, val);
 486     sect->len += 2;
 487 }
 488
 489 static inline void section_write8(struct coff_Section *sect, uint8_t val)
 490 {
 491     saa_write8(sect->data, val);
 492     sect->len++;
 493 }
 494
 495 static inline void section_wbytes(struct coff_Section *sect, const void *buf,
 496         size_t len)
 497 {
 498     saa_wbytes(sect->data, buf, len);
 499     sect->len += len;
 500 }
 501
 502 static void write_filename_table(struct coff_Section *const sect)
 503 {
 504     uint32_t field_length;
 505     uint32_t tbl_off = 1;    /* offset starts at 1 to skip NULL entry */
 506     struct source_file *file;
 507
 508     nasm_assert(cv8_state.source_files != NULL);
 509     nasm_assert(cv8_state.num_files > 0);
 510     nasm_assert(cv8_state.total_filename_len > 0);
 511
 512     field_length = 1 + cv8_state.total_filename_len;
 513
 514     section_write32(sect, 0x000000F3);
 515     section_write32(sect, field_length);
 516
 517     section_write8(sect, 0);
 518
 519     list_for_each(file, cv8_state.source_files) {
 520         section_wbytes(sect, file->fullname, file->fullnamelen + 1);
 521         file->filetbl_off = tbl_off;
 522         tbl_off += file->fullnamelen + 1;
 523     }
 524 }
 525
 526 static void write_sourcefile_table(struct coff_Section *const sect)
 527 {
 528     const uint32_t entry_size = 4 + 2 + MD5_HASHBYTES + 2;
 529
 530     uint32_t field_length = 0;
 531     uint32_t tbl_off = 0;
 532     struct source_file *file;
 533
 534     field_length = entry_size * cv8_state.num_files;
 535
 536     section_write32(sect, 0x000000F4);
 537     section_write32(sect, field_length);
 538
 539     list_for_each(file, cv8_state.source_files) {
 540         nasm_assert(file->filetbl_off > 0);
 541         section_write32(sect, file->filetbl_off);
 542         section_write16(sect, 0x0110);
 543         section_wbytes(sect, file->md5sum, MD5_HASHBYTES);
 544         section_write16(sect, 0);
 545
 546         file->sourcetbl_off = tbl_off;
 547         tbl_off += entry_size;
 548     }
 549 }
 550
 551 static void write_linenumber_table(struct coff_Section *const sect)
 552 {
 553     const uint32_t file_field_len = 12;
 554     const uint32_t line_field_len = 8;
 555
 556     int i;
 557     uint32_t field_length = 0;
 558     size_t field_base;
 559     struct source_file *file;
 560     struct coff_Section *s;
 561
 562     for (i = 0; i < coff_nsects; i++) {
 563         if (!strncmp(coff_sects[i]->name, ".text", 5))
 564             break;
 565     }
 566
 567     if (i == coff_nsects)
 568         return;
 569     s = coff_sects[i];
 570
 571     field_length = 12;
 572     field_length += (cv8_state.num_files * file_field_len);
 573     field_length += (cv8_state.total_lines * line_field_len);
 574
 575     section_write32(sect, 0x000000F2);
 576     section_write32(sect, field_length);
 577
 578     field_base = sect->len;
 579     section_write32(sect, 0); /* SECREL, updated by relocation */
 580     section_write16(sect, 0); /* SECTION, updated by relocation*/
 581     section_write16(sect, 0); /* pad */
 582     section_write32(sect, s->len);
 583
 584     register_reloc(sect, ".text", field_base,
 585         win64 ? IMAGE_REL_AMD64_SECREL : IMAGE_REL_I386_SECREL);
 586
 587     register_reloc(sect, ".text", field_base + 4,
 588         win64 ? IMAGE_REL_AMD64_SECTION : IMAGE_REL_I386_SECTION);
 589
 590     list_for_each(file, cv8_state.source_files) {
 591         struct linepair *li;
 592
 593         /* source mapping */
 594         section_write32(sect, file->sourcetbl_off);
 595         section_write32(sect, file->num_lines);
 596         section_write32(sect, file_field_len + (file->num_lines * line_field_len));
 597
 598         /* the pairs */
 599         saa_rewind(file->lines);
 600         while ((li = saa_rstruct(file->lines))) {
 601             section_write32(sect, li->file_offset);
 602             section_write32(sect, li->linenumber |= 0x80000000);
 603         }
 604     }
 605 }
 606
 607 static uint16_t write_symbolinfo_obj(struct coff_Section *sect,
 608         const char sep)
 609 {
 610     uint16_t obj_len;
 611
 612     obj_len = 2 + 4 + strlen(cv8_state.cwd)+ 1 + strlen(coff_outfile) +1;
 613
 614     section_write16(sect, obj_len);
 615     section_write16(sect, 0x1101);
 616     section_write32(sect, 0); /* ASM language */
 617     section_wbytes(sect, cv8_state.cwd, strlen(cv8_state.cwd));
 618     section_write8(sect, sep);
 619     section_wbytes(sect, coff_outfile, strlen(coff_outfile)+1);
 620
 621     return obj_len;
 622 }
 623
 624 static uint16_t write_symbolinfo_properties(struct coff_Section *sect,
 625         const char *const creator_str)
 626 {
 627     uint16_t creator_len;
 628
 629     creator_len = 2 + 4 + 4 + 4 + 4 + strlen(creator_str)+1 + 2;
 630
 631     section_write16(sect, creator_len);
 632     section_write16(sect, 0x1116);
 633     section_write32(sect, 3); /* language */
 634     if (win64)
 635         section_write32(sect, 0x000000D0);
 636     else if (win32)
 637         section_write32(sect, 0x00000006);
 638     else
 639         nasm_assert(!"neither win32 nor win64 are set!");
 640     section_write32(sect, 0); /* flags*/
 641     section_write32(sect, 8); /* version */
 642     section_wbytes(sect, creator_str, strlen(creator_str)+1);
 643     /*
 644      * normally there would be key/value pairs here, but they aren't
 645      * necessary. They are terminated by 2B
 646      */
 647     section_write16(sect, 0);
 648
 649     return creator_len;
 650 }
 651
 652 static uint16_t write_symbolinfo_symbols(struct coff_Section *sect)
 653 {
 654     uint16_t len = 0, field_len;
 655     uint32_t field_base;
 656     struct cv8_symbol *sym;
 657
 658     saa_rewind(cv8_state.symbols);
 659     while ((sym = saa_rstruct(cv8_state.symbols))) {
 660         switch (sym->type) {
 661         case SYMTYPE_LDATA:
 662         case SYMTYPE_GDATA:
 663             field_len = 12 + strlen(sym->name) + 1;
 664             len += field_len - 2;
 665             section_write16(sect, field_len);
 666             if (sym->type == SYMTYPE_LDATA)
 667                 section_write16(sect, 0x110C);
 668             else
 669                 section_write16(sect, 0x110D);
 670             section_write32(sect, sym->symtype);
 671
 672             field_base = sect->len;
 673             section_write32(sect, 0); /* SECREL */
 674             section_write16(sect, 0); /* SECTION */
 675             break;
 676         case SYMTYPE_PROC:
 677         case SYMTYPE_CODE:
 678             field_len = 9 + strlen(sym->name) + 1;
 679             len += field_len - 2;
 680             section_write16(sect, field_len);
 681             section_write16(sect, 0x1105);
 682
 683             field_base = sect->len;
 684             section_write32(sect, 0); /* SECREL */
 685             section_write16(sect, 0); /* SECTION */
 686             section_write8(sect, 0); /* FLAG */
 687             break;
 688         default:
 689             nasm_assert(!"unknown symbol type");
 690         }
 691
 692         section_wbytes(sect, sym->name, strlen(sym->name) + 1);
 693
 694         register_reloc(sect, sym->name, field_base,
 695             win64 ? IMAGE_REL_AMD64_SECREL :
 696                 IMAGE_REL_I386_SECREL);
 697         register_reloc(sect, sym->name, field_base + 4,
 698             win64 ? IMAGE_REL_AMD64_SECTION :
 699                 IMAGE_REL_I386_SECTION);
 700     }
 701
 702     return len;
 703 }
 704
 705 static void write_symbolinfo_table(struct coff_Section *const sect)
 706 {
 707     const char sep = '\\';
 708     const char *creator_str = "The Netwide Assembler " NASM_VER;
 709
 710
 711     uint16_t obj_length, creator_length, sym_length;
 712     uint32_t field_length = 0, out_len;
 713
 714     /* signature, language, workingdir / coff_outfile NULL */
 715     obj_length = 2 + 4 + strlen(cv8_state.cwd)+ 1 + strlen(coff_outfile) +1;
 716     creator_length = 2 + 4 + 4 + 4 + 4 + strlen(creator_str)+1 + 2;
 717
 718     sym_length =    ( cv8_state.num_syms[SYMTYPE_CODE] *  7) +
 719             ( cv8_state.num_syms[SYMTYPE_PROC] *  7) +
 720             ( cv8_state.num_syms[SYMTYPE_LDATA] * 10) +
 721             ( cv8_state.num_syms[SYMTYPE_GDATA] * 10) +
 722             cv8_state.symbol_lengths;
 723
 724     field_length = 2 + obj_length +
 725                2 + creator_length +
 726                (4 * cv8_state.total_syms) + sym_length;
 727
 728     section_write32(sect, 0x000000F1);
 729     section_write32(sect, field_length);
 730
 731     /* for sub fields, length preceeds type */
 732
 733     out_len = write_symbolinfo_obj(sect, sep);
 734     nasm_assert(out_len == obj_length);
 735
 736     out_len = write_symbolinfo_properties(sect, creator_str);
 737     nasm_assert(out_len == creator_length);
 738
 739     out_len = write_symbolinfo_symbols(sect);
 740     nasm_assert(out_len == sym_length);
 741 }
 742
 743 static inline void align4_table(struct coff_Section *const sect)
 744 {
 745     unsigned diff;
 746     uint32_t zero = 0;
 747     struct SAA *data = sect->data;
 748
 749     if (data->wptr % 4 == 0)
 750         return;
 751
 752     diff = 4 - (data->wptr % 4);
 753     if (diff)
 754         section_wbytes(sect, &zero, diff);
 755 }
 756
 757 static void build_symbol_table(struct coff_Section *const sect)
 758 {
 759     section_write32(sect, 0x00000004);
 760
 761     write_filename_table(sect);
 762     align4_table(sect);
 763     write_sourcefile_table(sect);
 764     align4_table(sect);
 765     write_linenumber_table(sect);
 766     align4_table(sect);
 767     write_symbolinfo_table(sect);
 768     align4_table(sect);
 769 }
 770
 771 static void build_type_table(struct coff_Section *const sect)
 772 {
 773     uint16_t field_len;
 774     struct cv8_symbol *sym;
 775
 776     section_write32(sect, 0x00000004);
 777
 778     saa_rewind(cv8_state.symbols);
 779     while ((sym = saa_rstruct(cv8_state.symbols))) {
 780         if (sym->type != SYMTYPE_PROC)
 781             continue;
 782
 783         /* proc leaf */
 784
 785         field_len = 2 + 4 + 4 + 4 + 2;
 786         section_write16(sect, field_len);
 787         section_write16(sect, 0x1008); /* PROC type */
 788
 789         section_write32(sect, 0x00000003); /* return type */
 790         section_write32(sect, 0); /* calling convention (default) */
 791         section_write32(sect, sym->typeindex);
 792         section_write16(sect, 0); /* # params */
 793
 794         /* arglist */
 795
 796         field_len = 2 + 4;
 797         section_write16(sect, field_len);
 798         section_write16(sect, 0x1201); /* ARGLIST */
 799         section_write32(sect, 0); /*num params */
 800     }
 801 }
 802
 803