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_cfi( ".cfi_startproc" );
 316     output( "\tpushl %%ebp\n" );
 317     output_cfi( ".cfi_adjust_cfa_offset 4" );
 318     output_cfi( ".cfi_rel_offset %%ebp,0" );
 319     output( "\tmovl %%esp,%%ebp\n" );
 320     output_cfi( ".cfi_def_cfa_register %%ebp" );
 321     stack_words = 2;
 322     if (needs_ldt)
 323     {
 324         output( "\tpushl %%esi\n" );
 325         output_cfi( ".cfi_rel_offset %%esi,-4" );
 326         stack_words++;
 327         if (UsePIC)
 328         {
 329             output( "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
 330             output( "1:\tmovl wine_ldt_copy_ptr-1b(%%eax),%%esi\n" );
 331         }
 332         else
 333             output( "\tmovl $%s,%%esi\n", asm_name("wine_ldt_copy") );
 334     }
 335
 336     /* preserve 16-byte stack alignment */
 337     stack_words += strlen(args);
 338     if ((odp->flags & FLAG_REGISTER) || (odp->type == TYPE_VARARGS)) stack_words++;
 339     if (stack_words % 4) output( "\tsubl $%d,%%esp\n", 16 - 4 * (stack_words % 4) );
 340
 341     if (args[0] || odp->type == TYPE_VARARGS)
 342         output( "\tmovl 12(%%ebp),%%ecx\n" );  /* args */
 343
 344     if (odp->flags & FLAG_REGISTER)
 345     {
 346         output( "\tpushl 16(%%ebp)\n" );  /* context */
 347     }
 348     else if (odp->type == TYPE_VARARGS)
 349     {
 350         output( "\tleal %d(%%ecx),%%eax\n", argsize );
 351         output( "\tpushl %%eax\n" );  /* va_list16 */
 352     }
 353
 354     pos = (odp->type == TYPE_PASCAL) ? 0 : argsize;
 355     for (i = strlen(args) - 1; i >= 0; i--)
 356     {
 357         switch (args[i])
 358         {
 359         case 'w':  /* word */
 360             if (odp->type != TYPE_PASCAL) pos -= 2;
 361             output( "\tmovzwl %d(%%ecx),%%eax\n", pos );
 362             output( "\tpushl %%eax\n" );
 363             if (odp->type == TYPE_PASCAL) pos += 2;
 364             break;
 365
 366         case 's':  /* s_word */
 367             if (odp->type != TYPE_PASCAL) pos -= 2;
 368             output( "\tmovswl %d(%%ecx),%%eax\n", pos );
 369             output( "\tpushl %%eax\n" );
 370             if (odp->type == TYPE_PASCAL) pos += 2;
 371             break;
 372
 373         case 'l':  /* long or segmented pointer */
 374         case 'T':  /* segmented pointer to null-terminated string */
 375             if (odp->type != TYPE_PASCAL) pos -= 4;
 376             output( "\tpushl %d(%%ecx)\n", pos );
 377             if (odp->type == TYPE_PASCAL) pos += 4;
 378             break;
 379
 380         case 'p':  /* linear pointer */
 381         case 't':  /* linear pointer to null-terminated string */
 382             if (odp->type != TYPE_PASCAL) pos -= 4;
 383             output( "\tmovzwl %d(%%ecx),%%edx\n", pos + 2 ); /* sel */
 384             output( "\tshr $3,%%edx\n" );
 385             output( "\tmovzwl %d(%%ecx),%%eax\n", pos ); /* offset */
 386             output( "\taddl (%%esi,%%edx,4),%%eax\n" );
 387             output( "\tpushl %%eax\n" );
 388             if (odp->type == TYPE_PASCAL) pos += 4;
 389             break;
 390
 391         default:
 392             assert(0);
 393         }
 394     }
 395
 396     output( "\tcall *8(%%ebp)\n" );
 397
 398     if (needs_ldt)
 399     {
 400         output( "\tmovl -4(%%ebp),%%esi\n" );
 401         output_cfi( ".cfi_same_value %%esi" );
 402     }
 403     output( "\tleave\n" );
 404     output_cfi( ".cfi_def_cfa %%esp,4" );
 405     output_cfi( ".cfi_same_value %%ebp" );
 406     output( "\tret\n" );
 407     output_cfi( ".cfi_endproc" );
 408     output_function_size( name );
 409 }
 410
 411
 412 /*******************************************************************
 413  *         callfrom16_type_compare
 414  *
 415  * Compare two callfrom16 sequences.
 416  */
 417 static int callfrom16_type_compare( const void *e1, const void *e2 )
 418 {
 419     const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
 420     const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
 421     int retval;
 422     int type1 = odp1->type;
 423     int type2 = odp2->type;
 424
 425     if (type1 == TYPE_STUB) type1 = TYPE_CDECL;
 426     if (type2 == TYPE_STUB) type2 = TYPE_CDECL;
 427
 428     if ((retval = type1 - type2) != 0) return retval;
 429
 430     type1 = odp1->flags & (FLAG_RET16|FLAG_REGISTER);
 431     type2 = odp2->flags & (FLAG_RET16|FLAG_REGISTER);
 432
 433     if ((retval = type1 - type2) != 0) return retval;
 434
 435     return strcmp( odp1->u.func.arg_types, odp2->u.func.arg_types );
 436 }
 437
 438
 439 /*******************************************************************
 440  *         relay_type_compare
 441  *
 442  * Same as callfrom16_type_compare but ignores differences that don't affect the resulting relay function.
 443  */
 444 static int relay_type_compare( const void *e1, const void *e2 )
 445 {
 446     const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
 447     const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
 448     char name1[80];
 449
 450     strcpy( name1, get_relay_name(odp1) );
 451     return strcmp( name1, get_relay_name(odp2) );
 452 }
 453
 454
 455 /*******************************************************************
 456  *         sort_func_list
 457  *
 458  * Sort a list of functions, removing duplicates.
 459  */
 460 static int sort_func_list( ORDDEF **list, int count,
 461                            int (*compare)(const void *, const void *) )
 462 {
 463     int i, j;
 464
 465     if (!count) return 0;
 466     qsort( list, count, sizeof(*list), compare );
 467
 468     for (i = j = 0; i < count; i++)
 469     {
 470         if (compare( &list[j], &list[i] )) list[++j] = list[i];
 471     }
 472     return j + 1;
 473 }
 474
 475
 476 /*******************************************************************
 477  *         output_module16
 478  *
 479  * Output code for a 16-bit module.
 480  */
 481 static void output_module16( DLLSPEC *spec )
 482 {
 483     ORDDEF **typelist;
 484     ORDDEF *entry_point = NULL;
 485     int i, j, nb_funcs;
 486
 487     /* store the main entry point as ordinal 0 */
 488
 489     if (!spec->ordinals)
 490     {
 491         assert(spec->limit == 0);
 492         spec->ordinals = xmalloc( sizeof(spec->ordinals[0]) );
 493         spec->ordinals[0] = NULL;
 494     }
 495     if (spec->init_func && !(spec->characteristics & IMAGE_FILE_DLL))
 496     {
 497         entry_point = xmalloc( sizeof(*entry_point) );
 498         entry_point->type = TYPE_PASCAL;
 499         entry_point->ordinal = 0;
 500         entry_point->lineno = 0;
 501         entry_point->flags = FLAG_REGISTER;
 502         entry_point->name = NULL;
 503         entry_point->link_name = xstrdup( spec->init_func );
 504         entry_point->export_name = NULL;
 505         entry_point->u.func.arg_types[0] = 0;
 506         assert( !spec->ordinals[0] );
 507         spec->ordinals[0] = entry_point;
 508     }
 509
 510     /* Build sorted list of all argument types, without duplicates */
 511
 512     typelist = xmalloc( (spec->limit + 1) * sizeof(*typelist) );
 513
 514     for (i = nb_funcs = 0; i <= spec->limit; i++)
 515     {
 516         ORDDEF *odp = spec->ordinals[i];
 517         if (!odp) continue;
 518         if (is_function( odp )) typelist[nb_funcs++] = odp;
 519     }
 520
 521     nb_funcs = sort_func_list( typelist, nb_funcs, callfrom16_type_compare );
 522
 523     /* Output the module structure */
 524
 525     output( "\n/* module data */\n\n" );
 526     output( "\t.data\n" );
 527     output( "\t.align %d\n", get_alignment(4) );
 528     output( ".L__wine_spec_dos_header:\n" );
 529     output( "\t%s 0x5a4d\n", get_asm_short_keyword() );                    /* e_magic */
 530     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cblp */
 531     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cp */
 532     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_crlc */
 533     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cparhdr */
 534     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_minalloc */
 535     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_maxalloc */
 536     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ss */
 537     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_sp */
 538     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_csum */
 539     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ip */
 540     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_cs */
 541     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_lfarlc */
 542     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_ovno */
 543     output( "\t%s 0,0,0,0\n", get_asm_short_keyword() );                   /* e_res */
 544     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_oemid */
 545     output( "\t%s 0\n", get_asm_short_keyword() );                         /* e_oeminfo */
 546     output( "\t%s 0,0,0,0,0,0,0,0,0,0\n", get_asm_short_keyword() );       /* e_res2 */
 547     output( "\t.long .L__wine_spec_ne_header-.L__wine_spec_dos_header\n" );/* e_lfanew */
 548
 549     output( ".L__wine_spec_ne_header:\n" );
 550     output( "\t%s 0x454e\n", get_asm_short_keyword() );                    /* ne_magic */
 551     output( "\t.byte 0\n" );                                               /* ne_ver */
 552     output( "\t.byte 0\n" );                                               /* ne_rev */
 553     output( "\t%s .L__wine_spec_ne_enttab-.L__wine_spec_ne_header\n",      /* ne_enttab */
 554              get_asm_short_keyword() );
 555     output( "\t%s .L__wine_spec_ne_enttab_end-.L__wine_spec_ne_enttab\n",  /* ne_cbenttab */
 556              get_asm_short_keyword() );
 557     output( "\t.long 0\n" );                                               /* ne_crc */
 558     output( "\t%s 0x%04x\n", get_asm_short_keyword(),                      /* ne_flags */
 559              NE_FFLAGS_SINGLEDATA |
 560              ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
 561     output( "\t%s 2\n", get_asm_short_keyword() );                         /* ne_autodata */
 562     output( "\t%s %u\n", get_asm_short_keyword(), spec->heap_size );       /* ne_heap */
 563     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_stack */
 564     if (!entry_point) output( "\t.long 0\n" );                             /* ne_csip */
 565     else output( "\t%s .L__wine_%s_0-.L__wine_spec_code_segment,1\n",
 566                  get_asm_short_keyword(), make_c_identifier(spec->dll_name) );
 567     output( "\t%s 0,2\n", get_asm_short_keyword() );                       /* ne_sssp */
 568     output( "\t%s 2\n", get_asm_short_keyword() );                         /* ne_cseg */
 569     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_cmod */
 570     output( "\t%s 0\n", get_asm_short_keyword() );                         /* ne_cbnrestab */
 571     output( "\t%s .L__wine_spec_ne_segtab-.L__wine_spec_ne_header\n",      /* ne_segtab */
 572              get_asm_short_keyword() );
 573     output( "\t%s .L__wine_spec_ne_rsrctab-.L__wine_spec_ne_header\n",     /* ne_rsrctab */
 574              get_asm_short_keyword() );
 575     output( "\t%s .L__wine_spec_ne_restab-.L__wine_spec_ne_header\n",      /* ne_restab */
 576              get_asm_short_keyword() );
 577     output( "\t%s .L__wine_spec_ne_modtab-.L__wine_spec_ne_header\n",      /* ne_modtab */
 578              get_asm_short_keyword() );
 579     output( "\t%s .L__wine_spec_ne_imptab-.L__wine_spec_ne_header\n",      /* ne_imptab */
 580              get_asm_short_keyword() );
 581     output( "\t.long 0\n" );                                   /* ne_nrestab */
 582     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_cmovent */
 583     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_align */
 584     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_cres */
 585     output( "\t.byte 0x02\n" );                                /* ne_exetyp = NE_OSFLAGS_WINDOWS */
 586     output( "\t.byte 0x08\n" );                                /* ne_flagsothers = NE_AFLAGS_FASTLOAD */
 587     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_pretthunks */
 588     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_psegrefbytes */
 589     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_swaparea */
 590     output( "\t%s 0\n", get_asm_short_keyword() );             /* ne_expver */
 591
 592     /* segment table */
 593
 594     output( "\n.L__wine_spec_ne_segtab:\n" );
 595
 596     /* code segment entry */
 597
 598     output( "\t%s .L__wine_spec_code_segment-.L__wine_spec_dos_header\n",  /* filepos */
 599              get_asm_short_keyword() );
 600     output( "\t%s .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n", /* size */
 601              get_asm_short_keyword() );
 602     output( "\t%s 0x2000\n", get_asm_short_keyword() ); /* flags = NE_SEGFLAGS_32BIT */
 603     output( "\t%s .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n", /* minsize */
 604              get_asm_short_keyword() );
 605
 606     /* data segment entry */
 607
 608     output( "\t%s .L__wine_spec_data_segment-.L__wine_spec_dos_header\n",  /* filepos */
 609              get_asm_short_keyword() );
 610     output( "\t%s .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n", /* size */
 611              get_asm_short_keyword() );
 612     output( "\t%s 0x0001\n", get_asm_short_keyword() ); /* flags = NE_SEGFLAGS_DATA */
 613     output( "\t%s .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n", /* minsize */
 614              get_asm_short_keyword() );
 615
 616     /* resource directory */
 617
 618     output_res16_directory( spec );
 619
 620     /* resident names table */
 621
 622     output( "\n\t.align %d\n", get_alignment(2) );
 623     output( ".L__wine_spec_ne_restab:\n" );
 624     output_resident_name( spec->dll_name, 0 );
 625     for (i = 1; i <= spec->limit; i++)
 626     {
 627         ORDDEF *odp = spec->ordinals[i];
 628         if (!odp || !odp->name[0]) continue;
 629         if (odp->flags & FLAG_EXPORT32) continue;
 630         output_resident_name( odp->name, i );
 631     }
 632     output( "\t.byte 0\n" );
 633
 634     /* imported names table */
 635
 636     output( "\n\t.align %d\n", get_alignment(2) );
 637     output( ".L__wine_spec_ne_modtab:\n" );
 638     output( ".L__wine_spec_ne_imptab:\n" );
 639     output( "\t.byte 0,0\n" );
 640
 641     /* entry table */
 642
 643     output( "\n.L__wine_spec_ne_enttab:\n" );
 644     output_entry_table( spec );
 645     output( ".L__wine_spec_ne_enttab_end:\n" );
 646
 647     /* code segment */
 648
 649     output( "\n\t.align %d\n", get_alignment(2) );
 650     output( ".L__wine_spec_code_segment:\n" );
 651
 652     for ( i = 0; i < nb_funcs; i++ )
 653     {
 654         unsigned int arg_types[2];
 655         int nop_words, argsize = 0;
 656
 657         if ( typelist[i]->type == TYPE_PASCAL )
 658             argsize = get_function_argsize( typelist[i] );
 659
 660         /* build the arg types bit fields */
 661         arg_types[0] = arg_types[1] = 0;
 662         for (j = 0; typelist[i]->u.func.arg_types[j]; j++)
 663         {
 664             int type = 0;
 665             switch(typelist[i]->u.func.arg_types[j])
 666             {
 667             case 'w': type = ARG_WORD; break;
 668             case 's': type = ARG_SWORD; break;
 669             case 'l': type = ARG_LONG; break;
 670             case 'p': type = ARG_PTR; break;
 671             case 't': type = ARG_STR; break;
 672             case 'T': type = ARG_SEGSTR; break;
 673             }
 674             arg_types[j / 10] |= type << (3 * (j % 10));
 675         }
 676         if (typelist[i]->type == TYPE_VARARGS) arg_types[j / 10] |= ARG_VARARG << (3 * (j % 10));
 677
 678         output( ".L__wine_spec_callfrom16_%s:\n", get_callfrom16_name(typelist[i]) );
 679         output( "\tpushl $.L__wine_spec_call16_%s\n", get_relay_name(typelist[i]) );
 680         output( "\tlcall $0,$0\n" );
 681
 682         if (typelist[i]->flags & FLAG_REGISTER)
 683         {
 684             nop_words = 4;
 685         }
 686         else if (typelist[i]->flags & FLAG_RET16)
 687         {
 688             output( "\torw %%ax,%%ax\n" );
 689             output( "\tnop\n" );  /* so that the lretw is aligned */
 690             nop_words = 2;
 691         }
 692         else
 693         {
 694             output( "\tshld $16,%%eax,%%edx\n" );
 695             output( "\torl %%eax,%%eax\n" );
 696             nop_words = 1;
 697         }
 698
 699         if (argsize)
 700         {
 701             output( "\tlretw $%u\n", argsize );
 702             nop_words--;
 703         }
 704         else output( "\tlretw\n" );
 705
 706         if (nop_words) output( "\t%s\n", nop_sequence[nop_words-1] );
 707
 708         /* the movl is here so that the code contains only valid instructions, */
 709         /* it's never actually executed, we only care about the arg_types[] values */
 710         output( "\t%s 0x86c7\n", get_asm_short_keyword() );
 711         output( "\t.long 0x%08x,0x%08x\n", arg_types[0], arg_types[1] );
 712     }
 713
 714     for (i = 0; i <= spec->limit; i++)
 715     {
 716         ORDDEF *odp = spec->ordinals[i];
 717         if (!odp || !is_function( odp )) continue;
 718         output( ".L__wine_%s_%u:\n", make_c_identifier(spec->dll_name), i );
 719         output( "\tpushw %%bp\n" );
 720         output( "\tpushl $%s\n",
 721                  asm_name( odp->type == TYPE_STUB ? get_stub_name( odp, spec ) : odp->link_name ));
 722         output( "\tcallw .L__wine_spec_callfrom16_%s\n", get_callfrom16_name( odp ) );
 723     }
 724     output( ".L__wine_spec_code_segment_end:\n" );
 725
 726     /* data segment */
 727
 728     output( "\n.L__wine_spec_data_segment:\n" );
 729     output( "\t.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\n" );  /* instance data */
 730     for (i = 0; i <= spec->limit; i++)
 731     {
 732         ORDDEF *odp = spec->ordinals[i];
 733         if (!odp || odp->type != TYPE_VARIABLE) continue;
 734         output( ".L__wine_%s_%u:\n", make_c_identifier(spec->dll_name), i );
 735         output( "\t.long " );
 736         for (j = 0; j < odp->u.var.n_values-1; j++)
 737             output( "0x%08x,", odp->u.var.values[j] );
 738         output( "0x%08x\n", odp->u.var.values[j] );
 739     }
 740     output( ".L__wine_spec_data_segment_end:\n" );
 741
 742     /* resource data */
 743
 744     if (spec->nb_resources)
 745     {
 746         output( "\n.L__wine_spec_resource_data:\n" );
 747         output_res16_data( spec );
 748     }
 749
 750     output( "\t.byte 0\n" );  /* make sure the last symbol points to something */
 751
 752     /* relay functions */
 753
 754     nb_funcs = sort_func_list( typelist, nb_funcs, relay_type_compare );
 755     if (nb_funcs)
 756     {
 757         output( "\n/* relay functions */\n\n" );
 758         output( "\t.text\n" );
 759         for ( i = 0; i < nb_funcs; i++ ) output_call16_function( typelist[i] );
 760         output( "\t.data\n" );
 761         output( "wine_ldt_copy_ptr:\n" );
 762         output( "\t.long %s\n", asm_name("wine_ldt_copy") );
 763     }
 764
 765     free( typelist );
 766 }
 767
 768
 769 /*******************************************************************
 770  *         output_spec16_file
 771  *
 772  * Output the complete data for a spec 16-bit file.
 773  */
 774 void output_spec16_file( DLLSPEC *spec16 )
 775 {
 776     DLLSPEC *spec32 = alloc_dll_spec();
 777
 778     resolve_imports( spec16 );
 779     add_16bit_exports( spec32, spec16 );
 780
 781     output_standard_file_header();
 782     output_module( spec32 );
 783     output_module16( spec16 );
 784     output_stubs( spec16 );
 785     output_exports( spec32 );
 786     output_imports( spec16 );
 787     if (is_undefined( "__wine_call_from_16" )) output_asm_relays16();
 788     if (spec16->main_module)
 789     {
 790         output( "\n\t%s\n", get_asm_string_section() );
 791         output( ".L__wine_spec_main_module:\n" );
 792         output( "\t%s \"%s\"\n", get_asm_string_keyword(), spec16->main_module );
 793     }
 794     output_gnu_stack_note();
 795     free_dll_spec( spec32 );
 796 }
 797
 798 /*******************************************************************
 799  *         output_fake_module16
 800  *
 801  * Create a fake 16-bit binary module.
 802  */
 803 void output_fake_module16( DLLSPEC *spec )
 804 {
 805     static const unsigned char code_segment[] = { 0x90, 0xc3 };
 806     static const unsigned char data_segment[16] = { 0 };
 807     static const char fakedll_signature[] = "Wine placeholder DLL";
 808     const unsigned int cseg = 2;
 809     const unsigned int lfanew = (0x40 + sizeof(fakedll_signature) + 15) & ~15;
 810     const unsigned int segtab = lfanew + 0x40;
 811
 812     unsigned int i, rsrctab, restab, namelen, modtab, imptab, enttab, cbenttab, codeseg, dataseg, rsrcdata;
 813
 814     init_output_buffer();
 815
 816     rsrctab = lfanew;
 817     restab = segtab + 8 * cseg;
 818     if (spec->nb_resources)
 819     {
 820         output_bin_res16_directory( spec, 0 );
 821         align_output( 2 );
 822         rsrctab = restab;
 823         restab += output_buffer_pos;
 824         free( output_buffer );
 825         init_output_buffer();
 826     }
 827
 828     namelen  = strlen( spec->dll_name );
 829     modtab   = restab + ((namelen + 3) & ~1);
 830     imptab   = modtab;
 831     enttab   = modtab + 2;
 832     cbenttab = 1;
 833     codeseg  = (enttab + cbenttab + 1) & ~1;
 834     dataseg  = codeseg + sizeof(code_segment);
 835     rsrcdata = dataseg + sizeof(data_segment);
 836
 837     init_output_buffer();
 838
 839     put_word( 0x5a4d );       /* e_magic */
 840     put_word( 0x40 );         /* e_cblp */
 841     put_word( 0x01 );         /* e_cp */
 842     put_word( 0 );            /* e_crlc */
 843     put_word( lfanew / 16 );  /* e_cparhdr */
 844     put_word( 0x0000 );       /* e_minalloc */
 845     put_word( 0xffff );       /* e_maxalloc */
 846     put_word( 0x0000 );       /* e_ss */
 847     put_word( 0x00b8 );       /* e_sp */
 848     put_word( 0 );            /* e_csum */
 849     put_word( 0 );            /* e_ip */
 850     put_word( 0 );            /* e_cs */
 851     put_word( lfanew );       /* e_lfarlc */
 852     put_word( 0 );            /* e_ovno */
 853     put_dword( 0 );           /* e_res */
 854     put_dword( 0 );
 855     put_word( 0 );            /* e_oemid */
 856     put_word( 0 );            /* e_oeminfo */
 857     put_dword( 0 );           /* e_res2 */
 858     put_dword( 0 );
 859     put_dword( 0 );
 860     put_dword( 0 );
 861     put_dword( 0 );
 862     put_dword( lfanew );
 863
 864     put_data( fakedll_signature, sizeof(fakedll_signature) );
 865     align_output( 16 );
 866
 867     put_word( 0x454e );                    /* ne_magic */
 868     put_byte( 0 );                         /* ne_ver */
 869     put_byte( 0 );                         /* ne_rev */
 870     put_word( enttab - lfanew );           /* ne_enttab */
 871     put_word( cbenttab );                  /* ne_cbenttab */
 872     put_dword( 0 );                        /* ne_crc */
 873     put_word( NE_FFLAGS_SINGLEDATA |       /* ne_flags */
 874               ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
 875     put_word( 2 );                         /* ne_autodata */
 876     put_word( spec->heap_size );           /* ne_heap */
 877     put_word( 0 );                         /* ne_stack */
 878     put_word( 0 ); put_word( 0 );          /* ne_csip */
 879     put_word( 0 ); put_word( 2 );          /* ne_sssp */
 880     put_word( cseg );                      /* ne_cseg */
 881     put_word( 0 );                         /* ne_cmod */
 882     put_word( 0 );                         /* ne_cbnrestab */
 883     put_word( segtab - lfanew );           /* ne_segtab */
 884     put_word( rsrctab - lfanew );          /* ne_rsrctab */
 885     put_word( restab - lfanew );           /* ne_restab */
 886     put_word( modtab - lfanew );           /* ne_modtab */
 887     put_word( imptab - lfanew );           /* ne_imptab */
 888     put_dword( 0 );                        /* ne_nrestab */
 889     put_word( 0 );                         /* ne_cmovent */
 890     put_word( 0 );                         /* ne_align */
 891     put_word( 0 );                         /* ne_cres */
 892     put_byte( 2 /*NE_OSFLAGS_WINDOWS*/ );  /* ne_exetyp */
 893     put_byte( 8 /*NE_AFLAGS_FASTLOAD*/ );  /* ne_flagsothers */
 894     put_word( 0 );                         /* ne_pretthunks */
 895     put_word( 0 );                         /* ne_psegrefbytes */
 896     put_word( 0 );                         /* ne_swaparea */
 897     put_word( 0 );                         /* ne_expver */
 898
 899     /* segment table */
 900     put_word( codeseg );
 901     put_word( sizeof(code_segment) );
 902     put_word( 0x2000 /* NE_SEGFLAGS_32BIT */ );
 903     put_word( sizeof(code_segment) );
 904     put_word( dataseg );
 905     put_word( sizeof(data_segment) );
 906     put_word( 0x0001 /* NE_SEGFLAGS_DATA */ );
 907     put_word( sizeof(data_segment) );
 908
 909     /* resource directory */
 910     if (spec->nb_resources)
 911     {
 912         output_bin_res16_directory( spec, rsrcdata );
 913         align_output( 2 );
 914     }
 915
 916     /* resident names table */
 917     put_byte( namelen );
 918     for (i = 0; i < namelen; i++) put_byte( toupper(spec->dll_name[i]) );
 919     put_byte( 0 );
 920     align_output( 2 );
 921
 922     /* imported names table */
 923     put_word( 0 );
 924
 925     /* entry table */
 926     put_byte( 0 );
 927     align_output( 2 );
 928
 929     /* code segment */
 930     put_data( code_segment, sizeof(code_segment) );
 931
 932     /* data segment */
 933     put_data( data_segment, sizeof(data_segment) );
 934
 935     /* resource data */
 936     output_bin_res16_data( spec );
 937
 938     flush_output_buffer();
 939 }