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winegstreamer: Synchronize concurrent access to the media source.
[wine.git] / tools / winebuild / spec16.c
blob8d4f96ea323f96d687b0eda013ea686e3c8940ca
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
27 #include <assert.h>
28 #include <ctype.h>
29
30 #include "build.h"
31
32 #define NE_FFLAGS_SINGLEDATA 0x0001
33 #define NE_FFLAGS_LIBMODULE 0x8000
34
35 /* argument type flags for relay debugging */
36 enum arg_types
37 {
38 ARG16_NONE = 0, /* indicates end of arg list */
39 ARG16_WORD, /* unsigned word */
40 ARG16_SWORD, /* signed word */
41 ARG16_LONG, /* long or segmented pointer */
42 ARG16_PTR, /* linear pointer */
43 ARG16_STR, /* linear pointer to null-terminated string */
44 ARG16_SEGSTR, /* segmented pointer to null-terminated string */
45 ARG16_VARARG /* start of varargs */
46 };
47
48 /* sequences of nops to fill a certain number of words */
49 static const char * const nop_sequence[4] =
50 {
51 ".byte 0x89,0xf6", /* mov %esi,%esi */
52 ".byte 0x8d,0x74,0x26,0x00", /* lea 0x00(%esi),%esi */
53 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00", /* lea 0x00000000(%esi),%esi */
54 ".byte 0x8d,0x74,0x26,0x00,0x8d,0x74,0x26,0x00" /* lea 0x00(%esi),%esi; lea 0x00(%esi),%esi */
55 };
56
57 static const char fakedll_signature[] = "Wine placeholder DLL";
58
59 static inline int is_function( const ORDDEF *odp )
60 {
61 if (odp->flags & FLAG_EXPORT32) return 0;
62 return (odp->type == TYPE_CDECL ||
63 odp->type == TYPE_PASCAL ||
64 odp->type == TYPE_VARARGS ||
65 odp->type == TYPE_STUB);
66 }
67
68 static const char *get_args_str( const ORDDEF *odp )
69 {
70 static char buffer[MAX_ARGUMENTS*2+1];
71 int i;
72
73 buffer[0] = 0;
74 for (i = 0; i < odp->u.func.nb_args; i++)
75 {
76 switch (odp->u.func.args[i])
77 {
78 case ARG_WORD: strcat( buffer, "w" ); break;
79 case ARG_SWORD: strcat( buffer, "s" ); break;
80 case ARG_SEGSTR: strcat( buffer, "T" ); break;
81 case ARG_STR: strcat( buffer, "t" ); break;
82 case ARG_LONG:
83 case ARG_FLOAT:
84 case ARG_SEGPTR: strcat( buffer, "l" ); break;
85 case ARG_PTR:
86 case ARG_WSTR:
87 case ARG_INT128: strcat( buffer, "p" ); break;
88 case ARG_INT64:
89 case ARG_DOUBLE: strcat( buffer, "ll" ); break;
90 }
91 }
92 return buffer;
93 }
94
95 /*******************************************************************
96 * output_entries
97 *
98 * Output entries for individual symbols in the entry table.
99 */
100 static void output_entries( DLLSPEC *spec, int first, int count )
101 {
102 int i;
103
104 for (i = 0; i < count; i++)
105 {
106 ORDDEF *odp = spec->ordinals[first + i];
107 output( "\t.byte 0x03\n" ); /* flags: exported & public data */
108 switch (odp->type)
109 {
110 case TYPE_CDECL:
111 case TYPE_PASCAL:
112 case TYPE_VARARGS:
113 case TYPE_STUB:
114 output( "\t.short .L__wine_%s_%u-.L__wine_spec_code_segment\n", spec->c_name, first + i );
115 break;
116 case TYPE_VARIABLE:
117 output( "\t.short .L__wine_%s_%u-.L__wine_spec_data_segment\n", spec->c_name, first + i );
118 break;
119 case TYPE_ABS:
120 output( "\t.short 0x%04x /* %s */\n",
121 odp->u.abs.value, odp->name );
122 break;
123 default:
124 assert(0);
125 }
126 }
127 }
128
129
130 /*******************************************************************
131 * output_entry_table
132 */
133 static void output_entry_table( DLLSPEC *spec )
134 {
135 int i, prev = 0, prev_sel = -1, bundle_count = 0;
136
137 for (i = 1; i <= spec->limit; i++)
138 {
139 int selector = 0;
140 ORDDEF *odp = spec->ordinals[i];
141 if (!odp) continue;
142 if (odp->flags & FLAG_EXPORT32) continue;
143
144 switch (odp->type)
145 {
146 case TYPE_CDECL:
147 case TYPE_PASCAL:
148 case TYPE_VARARGS:
149 case TYPE_STUB:
150 selector = 1; /* Code selector */
151 break;
152 case TYPE_VARIABLE:
153 selector = 2; /* Data selector */
154 break;
155 case TYPE_ABS:
156 selector = 0xfe; /* Constant selector */
157 break;
158 default:
159 continue;
160 }
161
162 if (prev + 1 != i || prev_sel != selector || bundle_count == 255)
163 {
164 /* need to start a new bundle */
165
166 /* flush previous bundle */
167 if (bundle_count)
168 {
169 output( "\t/* %s.%d - %s.%d */\n",
170 spec->dll_name, prev - bundle_count + 1, spec->dll_name, prev );
171 output( "\t.byte 0x%02x,0x%02x\n", bundle_count, prev_sel );
172 output_entries( spec, prev - bundle_count + 1, bundle_count );
173 }
174
175 if (prev + 1 != i)
176 {
177 int skip = i - (prev + 1);
178 while (skip > 255)
179 {
180 output( "\t.byte 0xff,0x00\n" );
181 skip -= 255;
182 }
183 output( "\t.byte 0x%02x,0x00\n", skip );
184 }
185
186 bundle_count = 0;
187 prev_sel = selector;
188 }
189 bundle_count++;
190 prev = i;
191 }
192
193 /* flush last bundle */
194 if (bundle_count)
195 {
196 output( "\t.byte 0x%02x,0x%02x\n", bundle_count, prev_sel );
197 output_entries( spec, prev - bundle_count + 1, bundle_count );
198 }
199 output( "\t.byte 0x00\n" );
200 }
201
202
203 /*******************************************************************
204 * output_resident_name
205 */
206 static void output_resident_name( const char *string, int ordinal )
207 {
208 unsigned int i, len = strlen(string);
209
210 output( "\t.byte 0x%02x", len );
211 for (i = 0; i < len; i++) output( ",0x%02x", (unsigned char)toupper(string[i]) );
212 output( " /* %s */\n", string );
213 output( "\t.short %u\n", ordinal );
214 }
215
216
217 /*******************************************************************
218 * get_callfrom16_name
219 */
220 static const char *get_callfrom16_name( const ORDDEF *odp )
221 {
222 static char *buffer;
223
224 free( buffer );
225 buffer = strmake( "%s_%s_%s",
226 (odp->type == TYPE_PASCAL) ? "p" :
227 (odp->type == TYPE_VARARGS) ? "v" : "c",
228 (odp->flags & FLAG_REGISTER) ? "regs" :
229 (odp->flags & FLAG_RET16) ? "word" : "long",
230 get_args_str(odp) );
231 return buffer;
232 }
233
234
235 /*******************************************************************
236 * get_relay_name
237 */
238 static const char *get_relay_name( const ORDDEF *odp )
239 {
240 static char buffer[80];
241 char *p;
242
243 switch(odp->type)
244 {
245 case TYPE_PASCAL:
246 strcpy( buffer, "p_" );
247 break;
248 case TYPE_VARARGS:
249 strcpy( buffer, "v_" );
250 break;
251 case TYPE_CDECL:
252 case TYPE_STUB:
253 strcpy( buffer, "c_" );
254 break;
255 default:
256 assert(0);
257 }
258 strcat( buffer, get_args_str(odp) );
259 for (p = buffer + 2; *p; p++)
260 {
261 /* map string types to the corresponding plain pointer type */
262 if (*p == 't') *p = 'p';
263 else if (*p == 'T') *p = 'l';
264 }
265 if (odp->flags & FLAG_REGISTER) strcat( buffer, "_regs" );
266 return buffer;
267 }
268
269
270 /*******************************************************************
271 * get_function_argsize
272 */
273 static int get_function_argsize( const ORDDEF *odp )
274 {
275 int i, argsize = 0;
276
277 for (i = 0; i < odp->u.func.nb_args; i++)
278 {
279 switch (odp->u.func.args[i])
280 {
281 case ARG_WORD:
282 case ARG_SWORD:
283 argsize += 2;
284 break;
285 case ARG_SEGPTR:
286 case ARG_SEGSTR:
287 case ARG_LONG:
288 case ARG_PTR:
289 case ARG_STR:
290 case ARG_WSTR:
291 case ARG_FLOAT:
292 case ARG_INT128:
293 argsize += 4;
294 break;
295 case ARG_INT64:
296 case ARG_DOUBLE:
297 argsize += 8;
298 break;
299 }
300 }
301 return argsize;
302 }
303
304
305 /*******************************************************************
306 * output_call16_function
307 *
308 * Build a 16-bit-to-Wine callback glue function.
309 *
310 * The generated routines are intended to be used as argument conversion
311 * routines to be called by the CallFrom16... core. Thus, the prototypes of
312 * the generated routines are (see also CallFrom16):
313 *
314 * extern WORD WINAPI __wine_spec_call16_C_xxx( FARPROC func, LPBYTE args );
315 * extern LONG WINAPI __wine_spec_call16_C_xxx( FARPROC func, LPBYTE args );
316 * extern void WINAPI __wine_spec_call16_C_xxx_regs( FARPROC func, LPBYTE args, CONTEXT86 *context );
317 *
318 * where 'C' is the calling convention ('p' for pascal or 'c' for cdecl),
319 * and each 'x' is an argument ('w'=word, 's'=signed word, 'l'=long,
320 * 'p'=linear pointer, 't'=linear pointer to null-terminated string,
321 * 'T'=segmented pointer to null-terminated string).
322 *
323 * The generated routines fetch the arguments from the 16-bit stack (pointed
324 * to by 'args'); the offsets of the single argument values are computed
325 * according to the calling convention and the argument types. Then, the
326 * 32-bit entry point is called with these arguments.
327 *
328 * For register functions, the arguments (if present) are converted just
329 * the same as for normal functions, but in addition the CONTEXT86 pointer
330 * filled with the current register values is passed to the 32-bit routine.
331 */
332 static void output_call16_function( ORDDEF *odp )
333 {
334 char *name;
335 int i, pos, stack_words;
336 int argsize = get_function_argsize( odp );
337 int needs_ldt = (strpbrk( get_args_str( odp ), "pt" ) != NULL);
338
339 name = strmake( ".L__wine_spec_call16_%s", get_relay_name(odp) );
340
341 output( "\t.align %d\n", get_alignment(4) );
342 output( "\t%s\n", func_declaration(name) );
343 output( "%s:\n", name );
344 output_cfi( ".cfi_startproc" );
345 output( "\tpushl %%ebp\n" );
346 output_cfi( ".cfi_adjust_cfa_offset 4" );
347 output_cfi( ".cfi_rel_offset %%ebp,0" );
348 output( "\tmovl %%esp,%%ebp\n" );
349 output_cfi( ".cfi_def_cfa_register %%ebp" );
350 stack_words = 2;
351 if (needs_ldt)
352 {
353 output( "\tpushl %%esi\n" );
354 output_cfi( ".cfi_rel_offset %%esi,-4" );
355 stack_words++;
356 if (UsePIC)
357 {
358 output( "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
359 output( "1:\tmovl .Lwine_ldt_copy_ptr-1b(%%eax),%%esi\n" );
360 needs_get_pc_thunk = 1;
361 }
362 else
363 output( "\tmovl .Lwine_ldt_copy_ptr,%%esi\n" );
364 }
365
366 /* preserve 16-byte stack alignment */
367 stack_words += odp->u.func.nb_args;
368 for (i = 0; i < odp->u.func.nb_args; i++)
369 if (odp->u.func.args[i] == ARG_DOUBLE || odp->u.func.args[i] == ARG_INT64) stack_words++;
370 if ((odp->flags & FLAG_REGISTER) || (odp->type == TYPE_VARARGS)) stack_words++;
371 if (stack_words % 4) output( "\tsubl $%d,%%esp\n", 16 - 4 * (stack_words % 4) );
372
373 if (odp->u.func.nb_args || odp->type == TYPE_VARARGS)
374 output( "\tmovl 12(%%ebp),%%ecx\n" ); /* args */
375
376 if (odp->flags & FLAG_REGISTER)
377 {
378 output( "\tpushl 16(%%ebp)\n" ); /* context */
379 }
380 else if (odp->type == TYPE_VARARGS)
381 {
382 output( "\tleal %d(%%ecx),%%eax\n", argsize );
383 output( "\tpushl %%eax\n" ); /* va_list16 */
384 }
385
386 pos = (odp->type == TYPE_PASCAL) ? 0 : argsize;
387 for (i = odp->u.func.nb_args - 1; i >= 0; i--)
388 {
389 switch (odp->u.func.args[i])
390 {
391 case ARG_WORD:
392 if (odp->type != TYPE_PASCAL) pos -= 2;
393 output( "\tmovzwl %d(%%ecx),%%eax\n", pos );
394 output( "\tpushl %%eax\n" );
395 if (odp->type == TYPE_PASCAL) pos += 2;
396 break;
397
398 case ARG_SWORD:
399 if (odp->type != TYPE_PASCAL) pos -= 2;
400 output( "\tmovswl %d(%%ecx),%%eax\n", pos );
401 output( "\tpushl %%eax\n" );
402 if (odp->type == TYPE_PASCAL) pos += 2;
403 break;
404
405 case ARG_INT64:
406 case ARG_DOUBLE:
407 if (odp->type != TYPE_PASCAL) pos -= 4;
408 output( "\tpushl %d(%%ecx)\n", pos );
409 if (odp->type == TYPE_PASCAL) pos += 4;
410 /* fall through */
411 case ARG_LONG:
412 case ARG_FLOAT:
413 case ARG_SEGPTR:
414 case ARG_SEGSTR:
415 if (odp->type != TYPE_PASCAL) pos -= 4;
416 output( "\tpushl %d(%%ecx)\n", pos );
417 if (odp->type == TYPE_PASCAL) pos += 4;
418 break;
419
420 case ARG_PTR:
421 case ARG_STR:
422 case ARG_WSTR:
423 case ARG_INT128:
424 if (odp->type != TYPE_PASCAL) pos -= 4;
425 output( "\tmovzwl %d(%%ecx),%%edx\n", pos + 2 ); /* sel */
426 output( "\tshr $3,%%edx\n" );
427 output( "\tmovzwl %d(%%ecx),%%eax\n", pos ); /* offset */
428 output( "\taddl (%%esi,%%edx,4),%%eax\n" );
429 output( "\tpushl %%eax\n" );
430 if (odp->type == TYPE_PASCAL) pos += 4;
431 break;
432 }
433 }
434
435 output( "\tcall *8(%%ebp)\n" );
436
437 if (needs_ldt)
438 {
439 output( "\tmovl -4(%%ebp),%%esi\n" );
440 output_cfi( ".cfi_same_value %%esi" );
441 }
442 output( "\tleave\n" );
443 output_cfi( ".cfi_def_cfa %%esp,4" );
444 output_cfi( ".cfi_same_value %%ebp" );
445 output( "\tret\n" );
446 output_cfi( ".cfi_endproc" );
447 output_function_size( name );
448 free( name );
449 }
450
451
452 /*******************************************************************
453 * callfrom16_type_compare
454 *
455 * Compare two callfrom16 sequences.
456 */
457 static int callfrom16_type_compare( const void *e1, const void *e2 )
458 {
459 const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
460 const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
461 int retval;
462 int type1 = odp1->type;
463 int type2 = odp2->type;
464 char args1[80];
465
466 if (type1 == TYPE_STUB) type1 = TYPE_CDECL;
467 if (type2 == TYPE_STUB) type2 = TYPE_CDECL;
468
469 if ((retval = type1 - type2) != 0) return retval;
470
471 type1 = odp1->flags & (FLAG_RET16|FLAG_REGISTER);
472 type2 = odp2->flags & (FLAG_RET16|FLAG_REGISTER);
473
474 if ((retval = type1 - type2) != 0) return retval;
475
476 strcpy( args1, get_args_str( odp1 ));
477 return strcmp( args1, get_args_str( odp2 ));
478 }
479
480
481 /*******************************************************************
482 * relay_type_compare
483 *
484 * Same as callfrom16_type_compare but ignores differences that don't affect the resulting relay function.
485 */
486 static int relay_type_compare( const void *e1, const void *e2 )
487 {
488 const ORDDEF *odp1 = *(const ORDDEF * const *)e1;
489 const ORDDEF *odp2 = *(const ORDDEF * const *)e2;
490 char name1[80];
491
492 strcpy( name1, get_relay_name(odp1) );
493 return strcmp( name1, get_relay_name(odp2) );
494 }
495
496
497 /*******************************************************************
498 * output_module16
499 *
500 * Output code for a 16-bit module.
501 */
502 static void output_module16( DLLSPEC *spec )
503 {
504 ORDDEF **typelist;
505 ORDDEF *entry_point = NULL;
506 int i, j, nb_funcs;
507
508 /* store the main entry point as ordinal 0 */
509
510 if (!spec->ordinals)
511 {
512 assert(spec->limit == 0);
513 spec->ordinals = xmalloc( sizeof(spec->ordinals[0]) );
514 spec->ordinals[0] = NULL;
515 }
516 if (spec->init_func && !(spec->characteristics & IMAGE_FILE_DLL))
517 {
518 entry_point = xmalloc( sizeof(*entry_point) );
519 entry_point->type = TYPE_PASCAL;
520 entry_point->ordinal = 0;
521 entry_point->lineno = 0;
522 entry_point->flags = FLAG_REGISTER;
523 entry_point->name = NULL;
524 entry_point->link_name = xstrdup( spec->init_func );
525 entry_point->export_name = NULL;
526 entry_point->u.func.nb_args = 0;
527 assert( !spec->ordinals[0] );
528 spec->ordinals[0] = entry_point;
529 }
530
531 /* Build sorted list of all argument types, without duplicates */
532
533 typelist = xmalloc( (spec->limit + 1) * sizeof(*typelist) );
534
535 for (i = nb_funcs = 0; i <= spec->limit; i++)
536 {
537 ORDDEF *odp = spec->ordinals[i];
538 if (!odp) continue;
539 if (is_function( odp )) typelist[nb_funcs++] = odp;
540 }
541
542 nb_funcs = sort_func_list( typelist, nb_funcs, callfrom16_type_compare );
543
544 /* Output the module structure */
545
546 output( "\n/* module data */\n\n" );
547 output( "\t.data\n" );
548 output( "\t.align %d\n", get_alignment(16) );
549 output( ".L__wine_spec_dos_header:\n" );
550 output( "\t.short 0x5a4d\n" ); /* e_magic */
551 output( "\t.short 0\n" ); /* e_cblp */
552 output( "\t.short 0\n" ); /* e_cp */
553 output( "\t.short 0\n" ); /* e_crlc */
554 output( "\t.short 0\n" ); /* e_cparhdr */
555 output( "\t.short 0\n" ); /* e_minalloc */
556 output( "\t.short 0\n" ); /* e_maxalloc */
557 output( "\t.short 0\n" ); /* e_ss */
558 output( "\t.short 0\n" ); /* e_sp */
559 output( "\t.short 0\n" ); /* e_csum */
560 output( "\t.short 0\n" ); /* e_ip */
561 output( "\t.short 0\n" ); /* e_cs */
562 output( "\t.short 0\n" ); /* e_lfarlc */
563 output( "\t.short 0\n" ); /* e_ovno */
564 output( "\t.short 0,0,0,0\n" ); /* e_res */
565 output( "\t.short 0\n" ); /* e_oemid */
566 output( "\t.short 0\n" ); /* e_oeminfo */
567 output( ".Lwine_ldt_copy_ptr:\n" ); /* e_res2, used for private data */
568 output( "\t.long .L__wine_spec_ne_header_end-.L__wine_spec_dos_header,0,0,0,0\n" );
569 output( "\t.long .L__wine_spec_ne_header-.L__wine_spec_dos_header\n" );/* e_lfanew */
570
571 output( "\t%s \"%s\"\n", get_asm_string_keyword(), fakedll_signature );
572 output( "\t.align %d\n", get_alignment(16) );
573 output( ".L__wine_spec_ne_header:\n" );
574 output( "\t.short 0x454e\n" ); /* ne_magic */
575 output( "\t.byte 0\n" ); /* ne_ver */
576 output( "\t.byte 0\n" ); /* ne_rev */
577 output( "\t.short .L__wine_spec_ne_enttab-.L__wine_spec_ne_header\n" );/* ne_enttab */
578 output( "\t.short .L__wine_spec_ne_enttab_end-.L__wine_spec_ne_enttab\n" );/* ne_cbenttab */
579 output( "\t.long 0\n" ); /* ne_crc */
580 output( "\t.short 0x%04x\n", NE_FFLAGS_SINGLEDATA | /* ne_flags */
581 ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
582 output( "\t.short 2\n" ); /* ne_autodata */
583 output( "\t.short %u\n", spec->heap_size ); /* ne_heap */
584 output( "\t.short 0\n" ); /* ne_stack */
585 if (!entry_point) output( "\t.long 0\n" ); /* ne_csip */
586 else output( "\t.short .L__wine_%s_0-.L__wine_spec_code_segment,1\n", spec->c_name );
587 output( "\t.short 0,2\n" ); /* ne_sssp */
588 output( "\t.short 2\n" ); /* ne_cseg */
589 output( "\t.short 0\n" ); /* ne_cmod */
590 output( "\t.short 0\n" ); /* ne_cbnrestab */
591 output( "\t.short .L__wine_spec_ne_segtab-.L__wine_spec_ne_header\n" );/* ne_segtab */
592 output( "\t.short .L__wine_spec_ne_rsrctab-.L__wine_spec_ne_header\n" ); /* ne_rsrctab */
593 output( "\t.short .L__wine_spec_ne_restab-.L__wine_spec_ne_header\n" ); /* ne_restab */
594 output( "\t.short .L__wine_spec_ne_modtab-.L__wine_spec_ne_header\n" ); /* ne_modtab */
595 output( "\t.short .L__wine_spec_ne_imptab-.L__wine_spec_ne_header\n" ); /* ne_imptab */
596 output( "\t.long 0\n" ); /* ne_nrestab */
597 output( "\t.short 0\n" ); /* ne_cmovent */
598 output( "\t.short 0\n" ); /* ne_align */
599 output( "\t.short 0\n" ); /* ne_cres */
600 output( "\t.byte 0x02\n" ); /* ne_exetyp = NE_OSFLAGS_WINDOWS */
601 output( "\t.byte 0x08\n" ); /* ne_flagsothers = NE_AFLAGS_FASTLOAD */
602 output( "\t.short 0\n" ); /* ne_pretthunks */
603 output( "\t.short 0\n" ); /* ne_psegrefbytes */
604 output( "\t.short 0\n" ); /* ne_swaparea */
605 output( "\t.short 0\n" ); /* ne_expver */
606
607 /* segment table */
608
609 output( "\n.L__wine_spec_ne_segtab:\n" );
610
611 /* code segment entry */
612
613 output( "\t.short .L__wine_spec_code_segment-.L__wine_spec_dos_header\n" ); /* filepos */
614 output( "\t.short .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n" ); /* size */
615 output( "\t.short 0x2000\n" ); /* flags = NE_SEGFLAGS_32BIT */
616 output( "\t.short .L__wine_spec_code_segment_end-.L__wine_spec_code_segment\n" ); /* minsize */
617
618 /* data segment entry */
619
620 output( "\t.short .L__wine_spec_data_segment-.L__wine_spec_dos_header\n" ); /* filepos */
621 output( "\t.short .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n" ); /* size */
622 output( "\t.short 0x0001\n" ); /* flags = NE_SEGFLAGS_DATA */
623 output( "\t.short .L__wine_spec_data_segment_end-.L__wine_spec_data_segment\n" ); /* minsize */
624
625 /* resource directory */
626
627 output_res16_directory( spec );
628
629 /* resident names table */
630
631 output( "\n\t.align %d\n", get_alignment(2) );
632 output( ".L__wine_spec_ne_restab:\n" );
633 output_resident_name( spec->dll_name, 0 );
634 for (i = 1; i <= spec->limit; i++)
635 {
636 ORDDEF *odp = spec->ordinals[i];
637 if (!odp || !odp->name[0]) continue;
638 if (odp->flags & FLAG_EXPORT32) continue;
639 output_resident_name( odp->name, i );
640 }
641 output( "\t.byte 0\n" );
642
643 /* imported names table */
644
645 output( "\n\t.align %d\n", get_alignment(2) );
646 output( ".L__wine_spec_ne_modtab:\n" );
647 output( ".L__wine_spec_ne_imptab:\n" );
648 output( "\t.byte 0,0\n" );
649
650 /* entry table */
651
652 output( "\n.L__wine_spec_ne_enttab:\n" );
653 output_entry_table( spec );
654 output( ".L__wine_spec_ne_enttab_end:\n" );
655
656 /* code segment */
657
658 output( "\n\t.align %d\n", get_alignment(2) );
659 output( ".L__wine_spec_code_segment:\n" );
660
661 for ( i = 0; i < nb_funcs; i++ )
662 {
663 unsigned int arg_types[2];
664 int nop_words, pos, argsize = 0;
665
666 if ( typelist[i]->type == TYPE_PASCAL )
667 argsize = get_function_argsize( typelist[i] );
668
669 /* build the arg types bit fields */
670 arg_types[0] = arg_types[1] = 0;
671 for (j = pos = 0; j < typelist[i]->u.func.nb_args && pos < 20; j++, pos++)
672 {
673 int type = 0;
674 switch (typelist[i]->u.func.args[j])
675 {
676 case ARG_WORD: type = ARG16_WORD; break;
677 case ARG_SWORD: type = ARG16_SWORD; break;
678 case ARG_SEGPTR: type = ARG16_LONG; break;
679 case ARG_SEGSTR: type = ARG16_SEGSTR; break;
680 case ARG_LONG: type = ARG16_LONG; break;
681 case ARG_PTR: type = ARG16_PTR; break;
682 case ARG_STR: type = ARG16_STR; break;
683 case ARG_WSTR: type = ARG16_PTR; break;
684 case ARG_FLOAT: type = ARG16_LONG; break;
685 case ARG_INT128: type = ARG16_PTR; break;
686 case ARG_INT64:
687 case ARG_DOUBLE:
688 type = ARG16_LONG;
689 arg_types[pos / 10] |= type << (3 * (pos % 10));
690 pos++;
691 break;
692 }
693 if (pos < 20) arg_types[pos / 10] |= type << (3 * (pos % 10));
694 }
695 if (typelist[i]->type == TYPE_VARARGS && pos < 20)
696 arg_types[pos / 10] |= ARG16_VARARG << (3 * (pos % 10));
697
698 output( ".L__wine_spec_callfrom16_%s:\n", get_callfrom16_name(typelist[i]) );
699 output( "\tpushl $.L__wine_spec_call16_%s\n", get_relay_name(typelist[i]) );
700 output( "\tlcall $0,$0\n" );
701
702 if (typelist[i]->flags & FLAG_REGISTER)
703 {
704 nop_words = 4;
705 }
706 else if (typelist[i]->flags & FLAG_RET16)
707 {
708 output( "\torw %%ax,%%ax\n" );
709 output( "\tnop\n" ); /* so that the lretw is aligned */
710 nop_words = 2;
711 }
712 else
713 {
714 output( "\tshld $16,%%eax,%%edx\n" );
715 output( "\torl %%eax,%%eax\n" );
716 nop_words = 1;
717 }
718
719 if (argsize)
720 {
721 output( "\tlretw $%u\n", argsize );
722 nop_words--;
723 }
724 else output( "\tlretw\n" );
725
726 if (nop_words) output( "\t%s\n", nop_sequence[nop_words-1] );
727
728 /* the movl is here so that the code contains only valid instructions, */
729 /* it's never actually executed, we only care about the arg_types[] values */
730 output( "\t.short 0x86c7\n" );
731 output( "\t.long 0x%08x,0x%08x\n", arg_types[0], arg_types[1] );
732 }
733
734 for (i = 0; i <= spec->limit; i++)
735 {
736 ORDDEF *odp = spec->ordinals[i];
737 if (!odp || !is_function( odp )) continue;
738 output( ".L__wine_%s_%u:\n", spec->c_name, i );
739 output( "\tpushw %%bp\n" );
740 output( "\tpushl $%s\n",
741 asm_name( odp->type == TYPE_STUB ? get_stub_name( odp, spec ) : get_link_name( odp )));
742 output( "\tcallw .L__wine_spec_callfrom16_%s\n", get_callfrom16_name( odp ) );
743 }
744 output( ".L__wine_spec_code_segment_end:\n" );
745
746 /* data segment */
747
748 output( "\n.L__wine_spec_data_segment:\n" );
749 output( "\t.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\n" ); /* instance data */
750 for (i = 0; i <= spec->limit; i++)
751 {
752 ORDDEF *odp = spec->ordinals[i];
753 if (!odp || odp->type != TYPE_VARIABLE) continue;
754 output( ".L__wine_%s_%u:\n", spec->c_name, i );
755 output( "\t.long " );
756 for (j = 0; j < odp->u.var.n_values-1; j++)
757 output( "0x%08x,", odp->u.var.values[j] );
758 output( "0x%08x\n", odp->u.var.values[j] );
759 }
760 output( ".L__wine_spec_data_segment_end:\n" );
761
762 /* resource data */
763
764 if (spec->nb_resources)
765 {
766 output( "\n.L__wine_spec_resource_data:\n" );
767 output_res16_data( spec );
768 }
769
770 output( ".L__wine_spec_ne_header_end:\n" );
771 output( "\t.byte 0\n" ); /* make sure the last symbol points to something */
772
773 /* relay functions */
774
775 nb_funcs = sort_func_list( typelist, nb_funcs, relay_type_compare );
776 if (nb_funcs)
777 {
778 output( "\n/* relay functions */\n\n" );
779 output( "\t.text\n" );
780 for ( i = 0; i < nb_funcs; i++ ) output_call16_function( typelist[i] );
781 }
782
783 free( typelist );
784 }
785
786
787 /*******************************************************************
788 * output_spec16_file
789 *
790 * Output the complete data for a spec 16-bit file.
791 */
792 void output_spec16_file( DLLSPEC *spec16 )
793 {
794 DLLSPEC *spec32 = alloc_dll_spec();
795
796 add_16bit_exports( spec32, spec16 );
797
798 needs_get_pc_thunk = 0;
799 open_output_file();
800 output_standard_file_header();
801 output_module( spec32 );
802 output_module16( spec16 );
803 output_stubs( spec16 );
804 output_exports( spec32 );
805 output_imports( spec16 );
806 if (!strcmp( spec16->dll_name, "kernel" )) output_asm_relays16();
807 if (needs_get_pc_thunk) output_get_pc_thunk();
808 if (spec16->main_module)
809 {
810 output( "\n\t%s\n", get_asm_string_section() );
811 output( ".L__wine_spec_main_module:\n" );
812 output( "\t%s \"%s\"\n", get_asm_string_keyword(), spec16->main_module );
813 }
814 output_gnu_stack_note();
815 close_output_file();
816 free_dll_spec( spec32 );
817 }
818
819 /*******************************************************************
820 * output_fake_module16
821 *
822 * Create a fake 16-bit binary module.
823 */
824 void output_fake_module16( DLLSPEC *spec )
825 {
826 static const unsigned char code_segment[] = { 0x90, 0xc3 };
827 static const unsigned char data_segment[16] = { 0 };
828 const unsigned int cseg = 2;
829 const unsigned int lfanew = (0x40 + sizeof(fakedll_signature) + 15) & ~15;
830 const unsigned int segtab = lfanew + 0x40;
831
832 unsigned int i, rsrctab, restab, namelen, modtab, imptab, enttab, cbenttab, codeseg, dataseg, rsrcdata, rsrc_size = 0;
833 void *rsrc_ptr = NULL;
834
835 init_output_buffer();
836
837 rsrctab = lfanew;
838 restab = segtab + 8 * cseg;
839 if (spec->nb_resources)
840 {
841 output_bin_res16_directory( spec, 0 );
842 align_output( 2 );
843 rsrctab = restab;
844 restab += output_buffer_pos;
845 free( output_buffer );
846 init_output_buffer();
847 output_bin_res16_data( spec );
848 rsrc_ptr = output_buffer;
849 rsrc_size = output_buffer_pos;
850 init_output_buffer();
851 }
852
853 namelen = strlen( spec->dll_name );
854 modtab = restab + ((namelen + 3) & ~1);
855 imptab = modtab;
856 enttab = modtab + 2;
857 cbenttab = 1;
858 codeseg = (enttab + cbenttab + 1) & ~1;
859 dataseg = codeseg + sizeof(code_segment);
860 rsrcdata = dataseg + sizeof(data_segment);
861
862 init_output_buffer();
863
864 put_word( 0x5a4d ); /* e_magic */
865 put_word( 0x40 ); /* e_cblp */
866 put_word( 0x01 ); /* e_cp */
867 put_word( 0 ); /* e_crlc */
868 put_word( lfanew / 16 ); /* e_cparhdr */
869 put_word( 0x0000 ); /* e_minalloc */
870 put_word( 0xffff ); /* e_maxalloc */
871 put_word( 0x0000 ); /* e_ss */
872 put_word( 0x00b8 ); /* e_sp */
873 put_word( 0 ); /* e_csum */
874 put_word( 0 ); /* e_ip */
875 put_word( 0 ); /* e_cs */
876 put_word( lfanew ); /* e_lfarlc */
877 put_word( 0 ); /* e_ovno */
878 put_dword( 0 ); /* e_res */
879 put_dword( 0 );
880 put_word( 0 ); /* e_oemid */
881 put_word( 0 ); /* e_oeminfo */
882 put_dword( rsrcdata + rsrc_size ); /* e_res2 */
883 put_dword( 0 );
884 put_dword( 0 );
885 put_dword( 0 );
886 put_dword( 0 );
887 put_dword( lfanew );
888
889 put_data( fakedll_signature, sizeof(fakedll_signature) );
890 align_output( 16 );
891
892 put_word( 0x454e ); /* ne_magic */
893 put_byte( 0 ); /* ne_ver */
894 put_byte( 0 ); /* ne_rev */
895 put_word( enttab - lfanew ); /* ne_enttab */
896 put_word( cbenttab ); /* ne_cbenttab */
897 put_dword( 0 ); /* ne_crc */
898 put_word( NE_FFLAGS_SINGLEDATA | /* ne_flags */
899 ((spec->characteristics & IMAGE_FILE_DLL) ? NE_FFLAGS_LIBMODULE : 0) );
900 put_word( 2 ); /* ne_autodata */
901 put_word( spec->heap_size ); /* ne_heap */
902 put_word( 0 ); /* ne_stack */
903 put_word( 0 ); put_word( 0 ); /* ne_csip */
904 put_word( 0 ); put_word( 2 ); /* ne_sssp */
905 put_word( cseg ); /* ne_cseg */
906 put_word( 0 ); /* ne_cmod */
907 put_word( 0 ); /* ne_cbnrestab */
908 put_word( segtab - lfanew ); /* ne_segtab */
909 put_word( rsrctab - lfanew ); /* ne_rsrctab */
910 put_word( restab - lfanew ); /* ne_restab */
911 put_word( modtab - lfanew ); /* ne_modtab */
912 put_word( imptab - lfanew ); /* ne_imptab */
913 put_dword( 0 ); /* ne_nrestab */
914 put_word( 0 ); /* ne_cmovent */
915 put_word( 0 ); /* ne_align */
916 put_word( 0 ); /* ne_cres */
917 put_byte( 2 /*NE_OSFLAGS_WINDOWS*/ ); /* ne_exetyp */
918 put_byte( 8 /*NE_AFLAGS_FASTLOAD*/ ); /* ne_flagsothers */
919 put_word( 0 ); /* ne_pretthunks */
920 put_word( 0 ); /* ne_psegrefbytes */
921 put_word( 0 ); /* ne_swaparea */
922 put_word( 0 ); /* ne_expver */
923
924 /* segment table */
925 put_word( codeseg );
926 put_word( sizeof(code_segment) );
927 put_word( 0x2000 /* NE_SEGFLAGS_32BIT */ );
928 put_word( sizeof(code_segment) );
929 put_word( dataseg );
930 put_word( sizeof(data_segment) );
931 put_word( 0x0001 /* NE_SEGFLAGS_DATA */ );
932 put_word( sizeof(data_segment) );
933
934 /* resource directory */
935 if (spec->nb_resources)
936 {
937 output_bin_res16_directory( spec, rsrcdata );
938 align_output( 2 );
939 }
940
941 /* resident names table */
942 put_byte( namelen );
943 for (i = 0; i < namelen; i++) put_byte( toupper(spec->dll_name[i]) );
944 put_byte( 0 );
945 align_output( 2 );
946
947 /* imported names table */
948 put_word( 0 );
949
950 /* entry table */
951 put_byte( 0 );
952 align_output( 2 );
953
954 /* code segment */
955 put_data( code_segment, sizeof(code_segment) );
956
957 /* data segment */
958 put_data( data_segment, sizeof(data_segment) );
959
960 /* resource data */
961 put_data( rsrc_ptr, rsrc_size );
962 }
Windows API implementation