tools/winebuild/spec16.c

   1 /*
   2  * 16-bit spec files
   3  *
   4  * Copyright 1993 Robert J. Amstadt
   5  * Copyright 1995 Martin von Loewis
   6  * Copyright 1995, 1996, 1997 Alexandre Julliard
   7  * Copyright 1997 Eric Youngdale
   8  * Copyright 1999 Ulrich Weigand
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <assert.h>
  29 #include <ctype.h>
  30
  31 #include "build.h"
  32
  33 #define NE_FFLAGS_SINGLEDATA 0x0001
  34 #define NE_FFLAGS_LIBMODULE  0x8000
  35
  36 /* argument type flags for relay debugging */
  37 enum arg_types
  38 {
  39     ARG_NONE = 0, /* indicates end of arg list */
  40     ARG_WORD,     /* unsigned word */
  41     ARG_SWORD,    /* signed word */
  42     ARG_LONG,     /* long or segmented pointer */
  43     ARG_PTR,      /* linear pointer */
  44     ARG_STR,      /* linear pointer to null-terminated string */
  45     ARG_SEGSTR,   /* segmented pointer to null-terminated string */
  46     ARG_VARARG    /* start of varargs */
  47 };
  48
  49 /* sequences of nops to fill a certain number of words */
  50 static const char * const nop_sequence[4] =
  51 {
  52     ".byte 0x89,0xf6",  /* mov %esi,%esi */
  53     ".byte 0x8d,0x74,0x26,0x00",  /* lea 0x00(%esi),%esi */
  54     ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00",  /* lea 0x00000000(%esi),%esi */
  55     ".byte 0x8d,0x74,0x26,0x00,0x8d,0x74,0x26,0x00" /* lea 0x00(%esi),%esi; lea 0x00(%esi),%esi */
  56 };
  57
  58 static inline int is_function( const ORDDEF *odp )
  59 {
  60     if (odp->flags & FLAG_EXPORT32) return 0;
  61     return (odp->type == TYPE_CDECL ||
  62             odp->type == TYPE_PASCAL ||
  63             odp->type == TYPE_VARARGS ||
  64             odp->type == TYPE_STUB);
  65 }
  66
  67 /*******************************************************************
  68  *         output_entries
  69  *
  70  * Output entries for individual symbols in the entry table.
  71  */
  72 static void output_entries( DLLSPEC *spec, int first, int count )
  73 {
  74     int i;
  75
  76     for (i = 0; i < count; i++)
  77     {
  78         ORDDEF *odp = spec->ordinals[first + i];
  79         output( "\t.byte 0x03\n" );  /* flags: exported & public data */
  80         switch (odp->type)
  81         {
  82         case TYPE_CDECL:
  83         case TYPE_PASCAL:
  84         case TYPE_VARARGS:
  85         case TYPE_STUB:
  86             output( "\t%s .L__wine_%s_%u-.L__wine_spec_code_segment\n",
  87                      get_asm_short_keyword(),
  88                      make_c_identifier(spec->dll_name), first + i );
  89             break;
  90         case TYPE_VARIABLE:
  91             output( "\t%s .L__wine_%s_%u-.L__wine_spec_data_segment\n",
  92                      get_asm_short_keyword(),
  93                      make_c_identifier(spec->dll_name), first + i );
  94             break;
  95         case TYPE_ABS:
  96             output( "\t%s 0x%04x  /* %s */\n",
  97                      get_asm_short_keyword(), odp->u.abs.value, odp->name );
  98             break;
  99         default:
 100             assert(0);
 101         }
 102     }
 103 }
 104
 105
 106 /*******************************************************************
 107  *         output_entry_table
 108  */
 109 static void output_entry_table( DLLSPEC *spec )
 110 {
 111     int i, prev = 0, prev_sel = -1, bundle_count = 0;
 112
 113     for (i = 1; i <= spec->limit; i++)
 114     {
 115         int selector = 0;
 116         ORDDEF *odp = spec->ordinals[i];
 117         if (!odp) continue;
 118         if (odp->flags & FLAG_EXPORT32) continue;
 119
 120         switch (odp->type)
 121         {
 122         case TYPE_CDECL:
 123         case TYPE_PASCAL:
 124         case TYPE_VARARGS:
 125         case TYPE_STUB:
 126             selector = 1;  /* Code selector */
 127             break;
 128         case TYPE_VARIABLE:
 129             selector = 2;  /* Data selector */
 130             break;
 131         case TYPE_ABS:
 132             selector = 0xfe;  /* Constant selector */
 133             break;
 134         default:
 135             continue;
 136         }
 137
 138         if (prev + 1 != i || prev_sel != selector || bundle_count == 255)
 139         {
 140             /* need to start a new bundle */
 141
 142             /* flush previous bundle */
 143             if (bundle_count)
 144             {
 145                 output( "\t/* %s.%d - %s.%d */\n",
 146                          spec->dll_name, prev - bundle_count + 1, spec->dll_name, prev );
 147                 output( "\t.byte 0x%02x,0x%02x\n", bundle_count, prev_sel );
 148                 output_entries( spec, prev - bundle_count + 1, bundle_count );
 149             }
 150
 151             if (prev + 1 != i)
 152             {
 153                 int skip = i - (prev + 1);
 154                 while (skip > 255)
 155                 {
 156                     output( "\t.byte 0xff,0x00\n" );
 157                     skip -= 255;
 158                 }
 159                 output( "\t.byte 0x%02x,0x00\n", skip );
 160             }
 161
 162             bundle_count = 0;
 163             prev_sel = selector;
 164         }
 165         bundle_count++;
 166         prev = i;
 167     }
 168
 169     /* flush last bundle */
 170     if (bundle_count)
 171     {
 172         output( "\t.byte 0x%02x,0x%02x\n", bundle_count, prev_sel );
 173         output_entries( spec, prev - bundle_count + 1, bundle_count );
 174     }
 175     output( "\t.byte 0x00\n" );
 176 }
 177
 178
 179 /*******************************************************************
 180  *         output_resident_name
 181  */
 182 static void output_resident_name( const char *string, int ordinal )
 183 {
 184     unsigned int i, len = strlen(string);
 185
 186     output( "\t.byte 0x%02x", len );
 187     for (i = 0; i < len; i++) output( ",0x%02x", (unsigned char)toupper(string[i]) );
 188     output( " /* %s */\n", string );
 189     output( "\t%s %u\n", get_asm_short_keyword(), ordinal );
 190 }
 191
 192
 193 /*******************************************************************
 194  *         get_callfrom16_name
 195  */
 196 static const char *get_callfrom16_name( const ORDDEF *odp )
 197 {
 198     static char buffer[80];
 199
 200     sprintf( buffer, "%s_%s_%s",
 201              (odp->type == TYPE_PASCAL) ? "p" :
 202              (odp->type == TYPE_VARARGS) ? "v" : "c",
 203              (odp->flags & FLAG_REGISTER) ? "regs" :
 204              (odp->flags & FLAG_RET16) ? "word" : "long",
 205              odp->u.func.arg_types );
 206     return buffer;
 207 }
 208
 209
 210 /*******************************************************************
 211  *         get_relay_name
 212  */
 213 static const char *get_relay_name( const ORDDEF *odp )
 214 {
 215     static char buffer[80];
 216     char *p;
 217
 218     switch(odp->type)
 219     {
 220     case TYPE_PASCAL:
 221         strcpy( buffer, "p_" );
 222         break;
 223     case TYPE_VARARGS:
 224         strcpy( buffer, "v_" );
 225         break;
 226     case TYPE_CDECL:
 227     case TYPE_STUB:
 228         strcpy( buffer, "c_" );
 229         break;
 230     default:
 231         assert(0);
 232     }
 233     strcat( buffer, odp->u.func.arg_types );
 234     for (p = buffer + 2; *p; p++)
 235     {
 236         /* map string types to the corresponding plain pointer type */
 237         if (*p == 't') *p = 'p';
 238         else if (*p == 'T') *p = 'l';
 239     }
 240     if (odp->flags & FLAG_REGISTER) strcat( buffer, "_regs" );
 241     return buffer;
 242 }
 243
 244
 245 /*******************************************************************
 246  *         get_function_argsize
 247  */
 248 static int get_function_argsize( const ORDDEF *odp )
 249 {
 250     const char *args;
 251     int argsize = 0;
 252
 253     for (args = odp->u.func.arg_types; *args; args++)
 254     {
 255         switch (*args)
 256         {
 257         case 'w':  /* word */
 258         case 's':  /* s_word */
 259             argsize += 2;
 260             break;
 261         case 'l':  /* long or segmented pointer */
 262         case 'T':  /* segmented pointer to null-terminated string */
 263         case 'p':  /* linear pointer */
 264         case 't':  /* linear pointer to null-terminated string */
 265             argsize += 4;
 266             break;
 267         default:
 268             assert(0);
 269         }
 270     }
 271     return argsize;
 272 }
 273
 274
 275 /*******************************************************************
 276  *         output_call16_function
 277  *
 278  * Build a 16-bit-to-Wine callback glue function.
 279  *
 280  * The generated routines are intended to be used as argument conversion
 281  * routines to be called by the CallFrom16... core. Thus, the prototypes of
 282  * the generated routines are (see also CallFrom16):
 283  *
 284  *  extern WORD WINAPI __wine_spec_call16_C_xxx( FARPROC func, LPBYTE args );
 285  *  extern LONG WINAPI __wine_spec_call16_C_xxx( FARPROC func, LPBYTE args );
 286  *  extern void WINAPI __wine_spec_call16_C_xxx_regs( FARPROC func, LPBYTE args, CONTEXT86 *context );
 287  *
 288  * where 'C' is the calling convention ('p' for pascal or 'c' for cdecl),
 289  * and each 'x' is an argument  ('w'=word, 's'=signed word, 'l'=long,
 290  * 'p'=linear pointer, 't'=linear pointer to null-terminated string,
 291  * 'T'=segmented pointer to null-terminated string).
 292  *
 293  * The generated routines fetch the arguments from the 16-bit stack (pointed
 294  * to by 'args'); the offsets of the single argument values are computed
 295  * according to the calling convention and the argument types.  Then, the
 296  * 32-bit entry point is called with these arguments.
 297  *
 298  * For register functions, the arguments (if present) are converted just
 299  * the same as for normal functions, but in addition the CONTEXT86 pointer
 300  * filled with the current register values is passed to the 32-bit routine.
 301  */
 302 static void output_call16_function( ORDDEF *odp )
 303 {
 304     char name[256];
 305     int i, pos, stack_words;
 306     const char *args = odp->u.func.arg_types;
 307     int argsize = get_function_argsize( odp );
 308     int needs_ldt = strchr( args, 'p' ) || strchr( args, 't' );
 309
 310     sprintf( name, ".L__wine_spec_call16_%s", get_relay_name(odp) );
 311
 312     output( "\t.align %d\n", get_alignment(4) );
 313     output( "\t%s\n", func_declaration(name) );
 314     output( "%s:\n", name );
 315     output( "\tpushl %%ebp\n" );
 316     output( "\tmovl %%esp,%%ebp\n" );
 317     stack_words = 2;
 318     if (needs_ldt)
 319     {
 320         output( "\tpushl %%esi\n" );
 321         stack_words++;
 322         if (UsePIC)
 323         {
 324             output( "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
 325             output( "1:\tmovl wine_ldt_copy_ptr-1b(%%eax),%%esi\n" );
 326         }
 327         else
 328             output( "\tmovl $%s,%%esi\n", asm_name("wine_ldt_copy") );
 329     }
 330
 331     /* preserve 16-byte stack alignment */
 332     stack_words += strlen(args);
 333     if ((odp->flags & FLAG_REGISTER) || (odp->type == TYPE_VARARGS)) stack_words++;
 334     if (stack_words % 4) output( "\tsubl $%d,%%esp\n", 16 - 4 * (stack_words % 4) );
 335
 336     if (args[0] || odp->type == TYPE_VARARGS)
 337         output( "\tmovl 12(%%ebp),%%ecx\n" );  /* args */
 338
 339     if (odp->flags & FLAG_REGISTER)
 340     {
 341         output( "\tpushl 16(%%ebp)\n" );  /* context */
 342     }
 343     else if (odp->type == TYPE_VARARGS)
 344     {
 345         output( "\tleal %d(%%ecx),%%eax\n", argsize );
 346         output( "\tpushl %%eax\n" );  /* va_list16 */
 347     }
 348
 349     pos = (odp->type == TYPE_PASCAL) ? 0 : argsize;
 350     for (i = strlen(args) - 1; i >= 0; i--)
 351     {
 352         switch (args[i])
 353         {
 354         case 'w':  /* word */
 355             if (odp->type != TYPE_PASCAL) pos -= 2;
 356             output( "\tmovzwl %d(%%ecx),%%eax\n", pos );
 357             output( "\tpushl %%eax\n" );
 358             if (odp->type == TYPE_PASCAL) pos += 2;
 359             break;
 360
 361         case 's':  /* s_word */
 362             if (odp->type != TYPE_PASCAL) pos -= 2;
 363             output( "\tmovswl %d(%%ecx),%%eax\n", pos );
 364             output( "\tpushl %%eax\n" );
 365             if (odp->type == TYPE_PASCAL) pos += 2;
 366             break;
 367
 368         case 'l':  /* long or segmented pointer */
 369         case 'T':  /* segmented pointer to null-terminated string */
 370             if (odp->type != TYPE_PASCAL) pos -= 4;
 371             output( "\tpushl %d(%%ecx)\n", pos );
 372             if (odp->type == TYPE_PASCAL) pos += 4;
 373             break;
 374
 375         case 'p':  /* linear pointer */
 376         case 't':  /* linear pointer to null-terminated string */
 377             if (odp->type != TYPE_PASCAL) pos -= 4;
 378             output( "\tmovzwl %d(%%ecx),%%edx\n", pos + 2 ); /* sel */
 379             output( "\tshr $3,%%edx\n" );
 380             output( "\tmovzwl %d(%%ecx),%%eax\n", pos ); /* offset */
 381             output( "\taddl (%%esi,%%edx,4),%%eax\n" );
 382             output( "\tpushl %%eax\n" );
 383             if (odp->type == TYPE_PASCAL) pos += 4;
 384             break;
 385
 386         default:
 387             assert(0);
 388         }
 389     }
 390
 391     output( "\tcall *8(%%ebp)\n" );
 392
 393     if (needs_ldt) output( "\tmovl -4(%%ebp),%%esi\n" );
 394
 395     output( "\tleave\n" );
 396     output( "\tret\n" );
 397     output_function_size( name );
 398 }
 399
 400
 401 /*******************************************************************
 402  *         callfrom16_type_compare
 403  *
 404  * Compare two callfrom16 sequences.
 405  */
 406 static int callfrom16_type_compare( const void *e1, const void *e2 )
 407 {
 408     const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
 409     const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
 410     int retval;
 411     int type1 = odp1->type;
 412     int type2 = odp2->type;
 413
 414     if (type1 == TYPE_STUB) type1 = TYPE_CDECL;
 415     if (type2 == TYPE_STUB) type2 = TYPE_CDECL;
 416
 417     if ((retval = type1 - type2) != 0) return retval;
 418
 419     type1 = odp1->flags & (FLAG_RET16|FLAG_REGISTER);
 420     type2 = odp2->flags & (FLAG_RET16|FLAG_REGISTER);
 421
 422     if ((retval = type1 - type2) != 0) return retval;
 423
 424     return strcmp( odp1->u.func.arg_types, odp2->u.func.arg_types );
 425 }
 426
 427
 428 /*******************************************************************
 429  *         relay_type_compare
 430  *
 431  * Same as callfrom16_type_compare but ignores differences that don't affect the resulting relay function.
 432  */
 433 static int relay_type_compare( const void *e1, const void *e2 )
 434 {
 435     const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
 436     const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
 437     char name1[80];
 438
 439     strcpy( name1, get_relay_name(odp1) );
 440     return strcmp( name1, get_relay_name(odp2) );
 441 }
 442
 443
 444 /*******************************************************************
 445  *         sort_func_list
 446  *
 447  * Sort a list of functions, removing duplicates.
 448  */
 449 static int sort_func_list( ORDDEF **list, int count,
 450                            int (*compare)(const void *, const void *) )
 451 {
 452     int i, j;
 453
 454     if (!count) return 0;
 455     qsort( list, count, sizeof(*list), compare );
 456
 457     for (i = j = 0; i < count; i++)
 458     {
 459         if (compare( &list[j], &list[i] )) list[++j] = list[i];
 460     }
 461     return j + 1;
 462 }
 463
 464
 465 /*******************************************************************
 466  *         output_module16
 467  *
 468  * Output code for a 16-bit module.
 469  */
 470 static void output_module16( DLLSPEC *spec )
 471 {
 472     ORDDEF **typelist;
 473     ORDDEF *entry_point = NULL;
 474     int i, j, nb_funcs;
 475
 476     /* store the main entry point as ordinal 0 */
 477
 478     if (!spec->ordinals)
 479     {
 480         assert(spec->limit == 0);
 481         spec->ordinals = xmalloc( sizeof(spec->ordinals[0]) );
 482         spec->ordinals[0] = NULL;
 483     }
 484     if (spec->init_func && !(spec->characteristics & IMAGE_FILE_DLL))
 485     {
 486         entry_point = xmalloc( sizeof(*entry_point) );
 487         entry_point->type = TYPE_PASCAL;
 488         entry_point->ordinal = 0;
 489         entry_point->lineno = 0;
 490         entry_point->flags = FLAG_REGISTER;
 491         entry_point->name = NULL;
 492         entry_point->link_name = xstrdup( spec->init_func );
 493         entry_point->export_name = NULL;
 494         entry_point->u.func.arg_types[0] = 0;
 495         assert( !spec->ordinals[0] );
 496         spec->ordinals[0] = entry_point;
 497     }
 498
 499     /* Build sorted list of all argument types, without duplicates */
 500
 501     typelist = xmalloc( (spec->limit + 1) * sizeof(*typelist) );
 502
 503     for (i = nb_funcs = 0; i <= spec->limit; i++)
 504     {
 505         ORDDEF *odp = spec->ordinals[i];
 506         if (!odp) continue;
 507         if (is_function( odp )) typelist[nb_funcs++] = odp;
 508     }
 509
 510     nb_funcs = sort_func_list( typelist, nb_funcs, callfrom16_type_compare );
 511
 512     /* Output the module structure */
 513
 514     output( "\n/* module data */\n\n" );
 515     output( "\t.data\n" );
 516     output( "\t.align %d\n", get_alignment(4) );
 517     output( ".L__wine_spec_dos_header:\n" );
 518     output( "\t%s 0x5a4d\n", get_asm_short_keyword() );                    /* e_magic */
 519     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cblp */
 520     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cp */
 521     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_crlc */
 522     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cparhdr */
 523     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_minalloc */
 524     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_maxalloc */
 525     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ss */
 526     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_sp */
 527     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_csum */
 528     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ip */
 529     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cs */
 530     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_lfarlc */
 531     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ovno */
 532     output( "\t%s 0,0,0,0\n", get_asm_short_keyword() );                   /* e_res */
 533     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_oemid */
 534     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_oeminfo */
 535     output( "\t%s 0,0,0,0,0,0,0,0,0,0\n", get_asm_short_keyword() );       /* e_res2 */
 536     output( "\t.long .L__wine_spec_ne_header-.L__wine_spec_dos_header\n" );/* e_lfanew */
 537
 538     output( ".L__wine_spec_ne_header:\n" );
 539     output( "\t%s 0x454e\n", get_asm_short_keyword() );                    /* ne_magic */
 540     output( "\t.byte 0\n" );                                               /* ne_ver */
 541     output( "\t.byte 0\n" );                                               /* ne_rev */
 542     output( "\t%s .L__wine_spec_ne_enttab-.L__wine_spec_ne_header\n",      /* ne_enttab */
 543              get_asm_short_keyword() );
 544     output( "\t%s .L__wine_spec_ne_enttab_end-.L__wine_spec_ne_enttab\n",  /* ne_cbenttab */
 545              get_asm_short_keyword() );
 546     output( "\t.long 0\n" );                                               /* ne_crc */
 547     output( "\t%s 0x%04x\n", get_asm_short_keyword(),                      /* ne_flags */
 548              NE_FFLAGS_SINGLEDATA |
 549              ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
 550     output( "\t%s 2\n", get_asm_short_keyword() );                         /* ne_autodata */
 551     output( "\t%s %u\n", get_asm_short_keyword(), spec->heap_size );       /* ne_heap */
 552     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_stack */
 553     if (!entry_point) output( "\t.long 0\n" );                             /* ne_csip */
 554     else output( "\t%s .L__wine_%s_0-.L__wine_spec_code_segment,1\n",
 555                  get_asm_short_keyword(), make_c_identifier(spec->dll_name) );
 556     output( "\t%s 0,2\n", get_asm_short_keyword() );                       /* ne_sssp */
 557     output( "\t%s 2\n", get_asm_short_keyword() );                         /* ne_cseg */
 558     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_cmod */
 559     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_cbnrestab */
 560     output( "\t%s .L__wine_spec_ne_segtab-.L__wine_spec_ne_header\n",      /* ne_segtab */
 561              get_asm_short_keyword() );
 562     output( "\t%s .L__wine_spec_ne_rsrctab-.L__wine_spec_ne_header\n",     /* ne_rsrctab */
 563              get_asm_short_keyword() );
 564     output( "\t%s .L__wine_spec_ne_restab-.L__wine_spec_ne_header\n",      /* ne_restab */
 565              get_asm_short_keyword() );
 566     output( "\t%s .L__wine_spec_ne_modtab-.L__wine_spec_ne_header\n",      /* ne_modtab */
 567              get_asm_short_keyword() );
 568     output( "\t%s .L__wine_spec_ne_imptab-.L__wine_spec_ne_header\n",      /* ne_imptab */
 569              get_asm_short_keyword() );
 570     output( "\t.long 0\n" );                                   /* ne_nrestab */
 571     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_cmovent */
 572     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_align */
 573     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_cres */
 574     output( "\t.byte 0x02\n" );                                /* ne_exetyp = NE_OSFLAGS_WINDOWS */
 575     output( "\t.byte 0x08\n" );                                /* ne_flagsothers = NE_AFLAGS_FASTLOAD */
 576     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_pretthunks */
 577     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_psegrefbytes */
 578     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_swaparea */
 579     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_expver */
 580
 581     /* segment table */
 582
 583     output( "\n.L__wine_spec_ne_segtab:\n" );
 584
 585     /* code segment entry */
 586
 587     output( "\t%s .L__wine_spec_code_segment-.L__wine_spec_dos_header\n",  /* filepos */
 588              get_asm_short_keyword() );
 589     output( "\t%s .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n", /* size */
 590              get_asm_short_keyword() );
 591     output( "\t%s 0x2000\n", get_asm_short_keyword() ); /* flags = NE_SEGFLAGS_32BIT */
 592     output( "\t%s .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n", /* minsize */
 593              get_asm_short_keyword() );
 594
 595     /* data segment entry */
 596
 597     output( "\t%s .L__wine_spec_data_segment-.L__wine_spec_dos_header\n",  /* filepos */
 598              get_asm_short_keyword() );
 599     output( "\t%s .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n", /* size */
 600              get_asm_short_keyword() );
 601     output( "\t%s 0x0001\n", get_asm_short_keyword() ); /* flags = NE_SEGFLAGS_DATA */
 602     output( "\t%s .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n", /* minsize */
 603              get_asm_short_keyword() );
 604
 605     /* resource directory */
 606
 607     output_res16_directory( spec );
 608
 609     /* resident names table */
 610
 611     output( "\n\t.align %d\n", get_alignment(2) );
 612     output( ".L__wine_spec_ne_restab:\n" );
 613     output_resident_name( spec->dll_name, 0 );
 614     for (i = 1; i <= spec->limit; i++)
 615     {
 616         ORDDEF *odp = spec->ordinals[i];
 617         if (!odp || !odp->name[0]) continue;
 618         if (odp->flags & FLAG_EXPORT32) continue;
 619         output_resident_name( odp->name, i );
 620     }
 621     output( "\t.byte 0\n" );
 622
 623     /* imported names table */
 624
 625     output( "\n\t.align %d\n", get_alignment(2) );
 626     output( ".L__wine_spec_ne_modtab:\n" );
 627     output( ".L__wine_spec_ne_imptab:\n" );
 628     output( "\t.byte 0,0\n" );
 629
 630     /* entry table */
 631
 632     output( "\n.L__wine_spec_ne_enttab:\n" );
 633     output_entry_table( spec );
 634     output( ".L__wine_spec_ne_enttab_end:\n" );
 635
 636     /* code segment */
 637
 638     output( "\n\t.align %d\n", get_alignment(2) );
 639     output( ".L__wine_spec_code_segment:\n" );
 640
 641     for ( i = 0; i < nb_funcs; i++ )
 642     {
 643         unsigned int arg_types[2];
 644         int nop_words, argsize = 0;
 645
 646         if ( typelist[i]->type == TYPE_PASCAL )
 647             argsize = get_function_argsize( typelist[i] );
 648
 649         /* build the arg types bit fields */
 650         arg_types[0] = arg_types[1] = 0;
 651         for (j = 0; typelist[i]->u.func.arg_types[j]; j++)
 652         {
 653             int type = 0;
 654             switch(typelist[i]->u.func.arg_types[j])
 655             {
 656             case 'w': type = ARG_WORD; break;
 657             case 's': type = ARG_SWORD; break;
 658             case 'l': type = ARG_LONG; break;
 659             case 'p': type = ARG_PTR; break;
 660             case 't': type = ARG_STR; break;
 661             case 'T': type = ARG_SEGSTR; break;
 662             }
 663             arg_types[j / 10] |= type << (3 * (j % 10));
 664         }
 665         if (typelist[i]->type == TYPE_VARARGS) arg_types[j / 10] |= ARG_VARARG << (3 * (j % 10));
 666
 667         output( ".L__wine_spec_callfrom16_%s:\n", get_callfrom16_name(typelist[i]) );
 668         output( "\tpushl $.L__wine_spec_call16_%s\n", get_relay_name(typelist[i]) );
 669         output( "\tlcall $0,$0\n" );
 670
 671         if (typelist[i]->flags & FLAG_REGISTER)
 672         {
 673             nop_words = 4;
 674         }
 675         else if (typelist[i]->flags & FLAG_RET16)
 676         {
 677             output( "\torw %%ax,%%ax\n" );
 678             output( "\tnop\n" );  /* so that the lretw is aligned */
 679             nop_words = 2;
 680         }
 681         else
 682         {
 683             output( "\tshld $16,%%eax,%%edx\n" );
 684             output( "\torl %%eax,%%eax\n" );
 685             nop_words = 1;
 686         }
 687
 688         if (argsize)
 689         {
 690             output( "\tlretw $%u\n", argsize );
 691             nop_words--;
 692         }
 693         else output( "\tlretw\n" );
 694
 695         if (nop_words) output( "\t%s\n", nop_sequence[nop_words-1] );
 696
 697         /* the movl is here so that the code contains only valid instructions, */
 698         /* it's never actually executed, we only care about the arg_types[] values */
 699         output( "\t%s 0x86c7\n", get_asm_short_keyword() );
 700         output( "\t.long 0x%08x,0x%08x\n", arg_types[0], arg_types[1] );
 701     }
 702
 703     for (i = 0; i <= spec->limit; i++)
 704     {
 705         ORDDEF *odp = spec->ordinals[i];
 706         if (!odp || !is_function( odp )) continue;
 707         output( ".L__wine_%s_%u:\n", make_c_identifier(spec->dll_name), i );
 708         output( "\tpushw %%bp\n" );
 709         output( "\tpushl $%s\n",
 710                  asm_name( odp->type == TYPE_STUB ? get_stub_name( odp, spec ) : odp->link_name ));
 711         output( "\tcallw .L__wine_spec_callfrom16_%s\n", get_callfrom16_name( odp ) );
 712     }
 713     output( ".L__wine_spec_code_segment_end:\n" );
 714
 715     /* data segment */
 716
 717     output( "\n.L__wine_spec_data_segment:\n" );
 718     output( "\t.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\n" );  /* instance data */
 719     for (i = 0; i <= spec->limit; i++)
 720     {
 721         ORDDEF *odp = spec->ordinals[i];
 722         if (!odp || odp->type != TYPE_VARIABLE) continue;
 723         output( ".L__wine_%s_%u:\n", make_c_identifier(spec->dll_name), i );
 724         output( "\t.long " );
 725         for (j = 0; j < odp->u.var.n_values-1; j++)
 726             output( "0x%08x,", odp->u.var.values[j] );
 727         output( "0x%08x\n", odp->u.var.values[j] );
 728     }
 729     output( ".L__wine_spec_data_segment_end:\n" );
 730
 731     /* resource data */
 732
 733     if (spec->nb_resources)
 734     {
 735         output( "\n.L__wine_spec_resource_data:\n" );
 736         output_res16_data( spec );
 737     }
 738
 739     output( "\t.byte 0\n" );  /* make sure the last symbol points to something */
 740
 741     /* relay functions */
 742
 743     nb_funcs = sort_func_list( typelist, nb_funcs, relay_type_compare );
 744     if (nb_funcs)
 745     {
 746         output( "\n/* relay functions */\n\n" );
 747         output( "\t.text\n" );
 748         for ( i = 0; i < nb_funcs; i++ ) output_call16_function( typelist[i] );
 749         output( "\t.data\n" );
 750         output( "wine_ldt_copy_ptr:\n" );
 751         output( "\t.long %s\n", asm_name("wine_ldt_copy") );
 752     }
 753
 754     free( typelist );
 755 }
 756
 757
 758 /*******************************************************************
 759  *         output_spec16_file
 760  *
 761  * Output the complete data for a spec 16-bit file.
 762  */
 763 void output_spec16_file( DLLSPEC *spec16 )
 764 {
 765     DLLSPEC *spec32 = alloc_dll_spec();
 766
 767     resolve_imports( spec16 );
 768     add_16bit_exports( spec32, spec16 );
 769
 770     output_standard_file_header();
 771     output_module( spec32 );
 772     output_module16( spec16 );
 773     output_stubs( spec16 );
 774     output_exports( spec32 );
 775     output_imports( spec16 );
 776     if (is_undefined( "__wine_call_from_16" )) output_asm_relays16();
 777     if (spec16->main_module)
 778     {
 779         output( "\n\t%s\n", get_asm_string_section() );
 780         output( ".L__wine_spec_main_module:\n" );
 781         output( "\t%s \"%s\"\n", get_asm_string_keyword(), spec16->main_module );
 782     }
 783     output_gnu_stack_note();
 784     free_dll_spec( spec32 );
 785 }
 786
 787 /*******************************************************************
 788  *         output_fake_module16
 789  *
 790  * Create a fake 16-bit binary module.
 791  */
 792 void output_fake_module16( DLLSPEC *spec )
 793 {
 794     static const unsigned char code_segment[] = { 0x90, 0xc3 };
 795     static const unsigned char data_segment[16] = { 0 };
 796     static const char fakedll_signature[] = "Wine placeholder DLL";
 797     const unsigned int cseg = 2;
 798     const unsigned int lfanew = (0x40 + sizeof(fakedll_signature) + 15) & ~15;
 799     const unsigned int segtab = lfanew + 0x40;
 800
 801     unsigned int i, rsrctab, restab, namelen, modtab, imptab, enttab, cbenttab, codeseg, dataseg, rsrcdata;
 802
 803     init_output_buffer();
 804
 805     rsrctab = lfanew;
 806     restab = segtab + 8 * cseg;
 807     if (spec->nb_resources)
 808     {
 809         output_bin_res16_directory( spec, 0 );
 810         align_output( 2 );
 811         rsrctab = restab;
 812         restab += output_buffer_pos;
 813         free( output_buffer );
 814         init_output_buffer();
 815     }
 816
 817     namelen  = strlen( spec->dll_name );
 818     modtab   = restab + ((namelen + 3) & ~1);
 819     imptab   = modtab;
 820     enttab   = modtab + 2;
 821     cbenttab = 1;
 822     codeseg  = (enttab + cbenttab + 1) & ~1;
 823     dataseg  = codeseg + sizeof(code_segment);
 824     rsrcdata = dataseg + sizeof(data_segment);
 825
 826     init_output_buffer();
 827
 828     put_word( 0x5a4d );       /* e_magic */
 829     put_word( 0x40 );         /* e_cblp */
 830     put_word( 0x01 );         /* e_cp */
 831     put_word( 0 );            /* e_crlc */
 832     put_word( lfanew / 16 );  /* e_cparhdr */
 833     put_word( 0x0000 );       /* e_minalloc */
 834     put_word( 0xffff );       /* e_maxalloc */
 835     put_word( 0x0000 );       /* e_ss */
 836     put_word( 0x00b8 );       /* e_sp */
 837     put_word( 0 );            /* e_csum */
 838     put_word( 0 );            /* e_ip */
 839     put_word( 0 );            /* e_cs */
 840     put_word( lfanew );       /* e_lfarlc */
 841     put_word( 0 );            /* e_ovno */
 842     put_dword( 0 );           /* e_res */
 843     put_dword( 0 );
 844     put_word( 0 );            /* e_oemid */
 845     put_word( 0 );            /* e_oeminfo */
 846     put_dword( 0 );           /* e_res2 */
 847     put_dword( 0 );
 848     put_dword( 0 );
 849     put_dword( 0 );
 850     put_dword( 0 );
 851     put_dword( lfanew );
 852
 853     put_data( fakedll_signature, sizeof(fakedll_signature) );
 854     align_output( 16 );
 855
 856     put_word( 0x454e );                    /* ne_magic */
 857     put_byte( 0 );                         /* ne_ver */
 858     put_byte( 0 );                         /* ne_rev */
 859     put_word( enttab - lfanew );           /* ne_enttab */
 860     put_word( cbenttab );                  /* ne_cbenttab */
 861     put_dword( 0 );                        /* ne_crc */
 862     put_word( NE_FFLAGS_SINGLEDATA |       /* ne_flags */
 863               ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
 864     put_word( 2 );                         /* ne_autodata */
 865     put_word( spec->heap_size );           /* ne_heap */
 866     put_word( 0 );                         /* ne_stack */
 867     put_word( 0 ); put_word( 0 );          /* ne_csip */
 868     put_word( 0 ); put_word( 2 );          /* ne_sssp */
 869     put_word( cseg );                      /* ne_cseg */
 870     put_word( 0 );                         /* ne_cmod */
 871     put_word( 0 );                         /* ne_cbnrestab */
 872     put_word( segtab - lfanew );           /* ne_segtab */
 873     put_word( rsrctab - lfanew );          /* ne_rsrctab */
 874     put_word( restab - lfanew );           /* ne_restab */
 875     put_word( modtab - lfanew );           /* ne_modtab */
 876     put_word( imptab - lfanew );           /* ne_imptab */
 877     put_dword( 0 );                        /* ne_nrestab */
 878     put_word( 0 );                         /* ne_cmovent */
 879     put_word( 0 );                         /* ne_align */
 880     put_word( 0 );                         /* ne_cres */
 881     put_byte( 2 /*NE_OSFLAGS_WINDOWS*/ );  /* ne_exetyp */
 882     put_byte( 8 /*NE_AFLAGS_FASTLOAD*/ );  /* ne_flagsothers */
 883     put_word( 0 );                         /* ne_pretthunks */
 884     put_word( 0 );                         /* ne_psegrefbytes */
 885     put_word( 0 );                         /* ne_swaparea */
 886     put_word( 0 );                         /* ne_expver */
 887
 888     /* segment table */
 889     put_word( codeseg );
 890     put_word( sizeof(code_segment) );
 891     put_word( 0x2000 /* NE_SEGFLAGS_32BIT */ );
 892     put_word( sizeof(code_segment) );
 893     put_word( dataseg );
 894     put_word( sizeof(data_segment) );
 895     put_word( 0x0001 /* NE_SEGFLAGS_DATA */ );
 896     put_word( sizeof(data_segment) );
 897
 898     /* resource directory */
 899     if (spec->nb_resources)
 900     {
 901         output_bin_res16_directory( spec, rsrcdata );
 902         align_output( 2 );
 903     }
 904
 905     /* resident names table */
 906     put_byte( namelen );
 907     for (i = 0; i < namelen; i++) put_byte( toupper(spec->dll_name[i]) );
 908     put_byte( 0 );
 909     align_output( 2 );
 910
 911     /* imported names table */
 912     put_word( 0 );
 913
 914     /* entry table */
 915     put_byte( 0 );
 916     align_output( 2 );
 917
 918     /* code segment */
 919     put_data( code_segment, sizeof(code_segment) );
 920
 921     /* data segment */
 922     put_data( data_segment, sizeof(data_segment) );
 923
 924     /* resource data */
 925     output_bin_res16_data( spec );
 926
 927     flush_output_buffer();
 928 }