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gdi32: Implement DC creation from pre-existing memory.
[wine.git] / dlls / krnl386.exe16 / ne_segment.c
blob1ceb714358359f5e0875f2ce2ec1d1c6895eee90
1 /*
2 * NE segment loading
3 *
4 * Copyright 1993 Robert J. Amstadt
5 * Copyright 1995 Alexandre Julliard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include "config.h"
23 #include "wine/port.h"
24
25 #include <assert.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <sys/types.h>
29 #include <fcntl.h>
30 #ifdef HAVE_UNISTD_H
31 # include <unistd.h>
32 #endif
33 #include <ctype.h>
34 #include <string.h>
35
36 #include "wine/winbase16.h"
37 #include "wownt32.h"
38 #include "winternl.h"
39 #include "wine/library.h"
40 #include "kernel16_private.h"
41 #include "wine/debug.h"
42
43 WINE_DEFAULT_DEBUG_CHANNEL(fixup);
44 WINE_DECLARE_DEBUG_CHANNEL(dll);
45 WINE_DECLARE_DEBUG_CHANNEL(module);
46
47 /*
48 * Relocation table entry
49 */
50 struct relocation_entry_s
51 {
52 BYTE address_type; /* Relocation address type */
53 BYTE relocation_type; /* Relocation type */
54 WORD offset; /* Offset in segment to fixup */
55 WORD target1; /* Target specification */
56 WORD target2; /* Target specification */
57 };
58
59 /*
60 * Relocation address types
61 */
62 #define NE_RADDR_LOWBYTE 0
63 #define NE_RADDR_SELECTOR 2
64 #define NE_RADDR_POINTER32 3
65 #define NE_RADDR_OFFSET16 5
66 #define NE_RADDR_POINTER48 11
67 #define NE_RADDR_OFFSET32 13
68
69 /*
70 * Relocation types
71 */
72 #define NE_RELTYPE_INTERNAL 0
73 #define NE_RELTYPE_ORDINAL 1
74 #define NE_RELTYPE_NAME 2
75 #define NE_RELTYPE_OSFIXUP 3
76 #define NE_RELFLAG_ADDITIVE 4
77
78 /* Self-loading modules contain this structure in their first segment */
79 typedef struct
80 {
81 WORD version; /* Must be "A0" (0x3041) */
82 WORD reserved;
83 FARPROC16 BootApp; /* startup procedure */
84 FARPROC16 LoadAppSeg; /* procedure to load a segment */
85 FARPROC16 reserved2;
86 FARPROC16 MyAlloc; /* memory allocation procedure,
87 * wine must write this field */
88 FARPROC16 EntryAddrProc;
89 FARPROC16 ExitProc; /* exit procedure */
90 WORD reserved3[4];
91 FARPROC16 SetOwner; /* Set Owner procedure, exported by wine */
92 } SELFLOADHEADER;
93
94 #define SEL(x) ((x)|1)
95
96 static void NE_FixupSegmentPrologs(NE_MODULE *pModule, WORD segnum);
97
98
99 /***********************************************************************
100 * NE_GetRelocAddrName
101 */
102 static const char *NE_GetRelocAddrName( BYTE addr_type, int additive )
103 {
104 switch(addr_type & 0x7f)
105 {
106 case NE_RADDR_LOWBYTE: return additive ? "BYTE add" : "BYTE";
107 case NE_RADDR_OFFSET16: return additive ? "OFFSET16 add" : "OFFSET16";
108 case NE_RADDR_POINTER32: return additive ? "POINTER32 add" : "POINTER32";
109 case NE_RADDR_SELECTOR: return additive ? "SELECTOR add" : "SELECTOR";
110 case NE_RADDR_POINTER48: return additive ? "POINTER48 add" : "POINTER48";
111 case NE_RADDR_OFFSET32: return additive ? "OFFSET32 add" : "OFFSET32";
112 }
113 return "???";
114 }
115
116
117 /***********************************************************************
118 * NE_OpenFile
119 */
120 static HFILE16 NE_OpenFile( NE_MODULE *pModule )
121 {
122 char *name = NE_MODULE_NAME( pModule );
123 HANDLE handle = CreateFileA( name, GENERIC_READ, FILE_SHARE_READ,
124 NULL, OPEN_EXISTING, 0, 0 );
125
126 if (handle == INVALID_HANDLE_VALUE)
127 {
128 ERR( "Can't open file '%s' for module %04x\n", name, pModule->self );
129 return HFILE_ERROR;
130 }
131 return Win32HandleToDosFileHandle( handle );
132 }
133
134
135 /***********************************************************************
136 * apply_relocations
137 *
138 * Apply relocations to a segment. Helper for NE_LoadSegment.
139 */
140 static inline BOOL apply_relocations( NE_MODULE *pModule, const struct relocation_entry_s *rep,
141 int count, int segnum )
142 {
143 BYTE *func_name;
144 char buffer[256];
145 int i, ordinal;
146 WORD offset, *sp;
147 HMODULE16 module;
148 FARPROC16 address = 0;
149 HMODULE16 *pModuleTable = (HMODULE16 *)((char *)pModule + pModule->ne_modtab);
150 SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
151 SEGTABLEENTRY *pSeg = pSegTable + segnum - 1;
152
153 /*
154 * Go through the relocation table one entry at a time.
155 */
156 for (i = 0; i < count; i++, rep++)
157 {
158 /*
159 * Get the target address corresponding to this entry.
160 */
161
162 /* If additive, there is no target chain list. Instead, add source
163 and target */
164 int additive = rep->relocation_type & NE_RELFLAG_ADDITIVE;
165 switch (rep->relocation_type & 3)
166 {
167 case NE_RELTYPE_ORDINAL:
168 module = pModuleTable[rep->target1-1];
169 ordinal = rep->target2;
170 address = NE_GetEntryPoint( module, ordinal );
171 if (!address)
172 {
173 NE_MODULE *pTarget = NE_GetPtr( module );
174 if (!pTarget)
175 WARN_(module)("Module not found: %04x, reference %d of module %*.*s\n",
176 module, rep->target1,
177 *((BYTE *)pModule + pModule->ne_restab),
178 *((BYTE *)pModule + pModule->ne_restab),
179 (char *)pModule + pModule->ne_restab + 1 );
180 else
181 {
182 ERR("No implementation for %.*s.%d, setting to 0xdeadbeef\n",
183 *((BYTE *)pTarget + pTarget->ne_restab),
184 (char *)pTarget + pTarget->ne_restab + 1,
185 ordinal );
186 address = (FARPROC16)0xdeadbeef;
187 }
188 }
189 if (TRACE_ON(fixup))
190 {
191 NE_MODULE *pTarget = NE_GetPtr( module );
192 TRACE("%d: %.*s.%d=%04x:%04x %s\n", i + 1,
193 *((BYTE *)pTarget + pTarget->ne_restab),
194 (char *)pTarget + pTarget->ne_restab + 1,
195 ordinal, HIWORD(address), LOWORD(address),
196 NE_GetRelocAddrName( rep->address_type, additive ) );
197 }
198 break;
199
200 case NE_RELTYPE_NAME:
201 module = pModuleTable[rep->target1-1];
202 func_name = (BYTE *)pModule + pModule->ne_imptab + rep->target2;
203 memcpy( buffer, func_name+1, *func_name );
204 buffer[*func_name] = '\0';
205 ordinal = NE_GetOrdinal( module, buffer );
206 address = NE_GetEntryPoint( module, ordinal );
207
208 if (ERR_ON(fixup) && !address)
209 {
210 NE_MODULE *pTarget = NE_GetPtr( module );
211 ERR("No implementation for %.*s.%s, setting to 0xdeadbeef\n",
212 *((BYTE *)pTarget + pTarget->ne_restab),
213 (char *)pTarget + pTarget->ne_restab + 1, buffer );
214 }
215 if (!address) address = (FARPROC16) 0xdeadbeef;
216 if (TRACE_ON(fixup))
217 {
218 NE_MODULE *pTarget = NE_GetPtr( module );
219 TRACE("%d: %.*s.%s=%04x:%04x %s\n", i + 1,
220 *((BYTE *)pTarget + pTarget->ne_restab),
221 (char *)pTarget + pTarget->ne_restab + 1,
222 buffer, HIWORD(address), LOWORD(address),
223 NE_GetRelocAddrName( rep->address_type, additive ) );
224 }
225 break;
226
227 case NE_RELTYPE_INTERNAL:
228 if ((rep->target1 & 0xff) == 0xff)
229 {
230 address = NE_GetEntryPoint( pModule->self, rep->target2 );
231 }
232 else
233 {
234 address = (FARPROC16)MAKESEGPTR( SEL(pSegTable[rep->target1-1].hSeg), rep->target2 );
235 }
236
237 TRACE("%d: %04x:%04x %s\n",
238 i + 1, HIWORD(address), LOWORD(address),
239 NE_GetRelocAddrName( rep->address_type, additive ) );
240 break;
241
242 case NE_RELTYPE_OSFIXUP:
243 /* Relocation type 7:
244 *
245 * These appear to be used as fixups for the Windows
246 * floating point emulator. Let's just ignore them and
247 * try to use the hardware floating point. Linux should
248 * successfully emulate the coprocessor if it doesn't
249 * exist.
250 */
251 TRACE("%d: TYPE %d, OFFSET %04x, TARGET %04x %04x %s\n",
252 i + 1, rep->relocation_type, rep->offset,
253 rep->target1, rep->target2,
254 NE_GetRelocAddrName( rep->address_type, additive ) );
255 continue;
256 }
257
258 offset = rep->offset;
259
260 /* Apparently, high bit of address_type is sometimes set; */
261 /* we ignore it for now */
262 if (rep->address_type > NE_RADDR_OFFSET32)
263 {
264 char module[10];
265 GetModuleName16( pModule->self, module, sizeof(module) );
266 ERR("WARNING: module %s: unknown reloc addr type = 0x%02x. Please report.\n",
267 module, rep->address_type );
268 }
269
270 if (additive)
271 {
272 sp = MapSL( MAKESEGPTR( SEL(pSeg->hSeg), offset ) );
273 TRACE(" %04x:%04x\n", offset, *sp );
274 switch (rep->address_type & 0x7f)
275 {
276 case NE_RADDR_LOWBYTE:
277 *(BYTE *)sp += LOBYTE((int)address);
278 break;
279 case NE_RADDR_OFFSET16:
280 *sp += LOWORD(address);
281 break;
282 case NE_RADDR_POINTER32:
283 *sp += LOWORD(address);
284 *(sp+1) = HIWORD(address);
285 break;
286 case NE_RADDR_SELECTOR:
287 /* Borland creates additive records with offset zero. Strange, but OK */
288 if (*sp)
289 ERR("Additive selector to %04x.Please report\n",*sp);
290 else
291 *sp = HIWORD(address);
292 break;
293 default:
294 goto unknown;
295 }
296 }
297 else /* non-additive fixup */
298 {
299 do
300 {
301 WORD next_offset;
302
303 sp = MapSL( MAKESEGPTR( SEL(pSeg->hSeg), offset ) );
304 next_offset = *sp;
305 TRACE(" %04x:%04x\n", offset, *sp );
306 switch (rep->address_type & 0x7f)
307 {
308 case NE_RADDR_LOWBYTE:
309 *(BYTE *)sp = LOBYTE((int)address);
310 break;
311 case NE_RADDR_OFFSET16:
312 *sp = LOWORD(address);
313 break;
314 case NE_RADDR_POINTER32:
315 *(FARPROC16 *)sp = address;
316 break;
317 case NE_RADDR_SELECTOR:
318 *sp = SELECTOROF(address);
319 break;
320 default:
321 goto unknown;
322 }
323 if (next_offset == offset) break; /* avoid infinite loop */
324 if (next_offset >= GlobalSize16(pSeg->hSeg)) break;
325 offset = next_offset;
326 } while (offset != 0xffff);
327 }
328 }
329 return TRUE;
330
331 unknown:
332 WARN("WARNING: %d: unknown ADDR TYPE %d, "
333 "TYPE %d, OFFSET %04x, TARGET %04x %04x\n",
334 i + 1, rep->address_type, rep->relocation_type,
335 rep->offset, rep->target1, rep->target2);
336 return FALSE;
337 }
338
339
340 /***********************************************************************
341 * NE_LoadSegment
342 */
343 BOOL NE_LoadSegment( NE_MODULE *pModule, WORD segnum )
344 {
345 WORD count;
346 DWORD pos;
347 const struct relocation_entry_s *rep;
348 int size;
349 SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
350 SEGTABLEENTRY *pSeg = pSegTable + segnum - 1;
351
352 if (pSeg->flags & NE_SEGFLAGS_LOADED)
353 {
354 /* self-loader ? -> already loaded it */
355 if (pModule->ne_flags & NE_FFLAGS_SELFLOAD)
356 return TRUE;
357
358 /* leave, except for DGROUP, as this may be the second instance */
359 if (segnum != pModule->ne_autodata)
360 return TRUE;
361 }
362
363 if (!pSeg->filepos) return TRUE; /* No file image, just return */
364
365 TRACE_(module)("Loading segment %d, hSeg=%04x, flags=%04x\n",
366 segnum, pSeg->hSeg, pSeg->flags );
367 pos = pSeg->filepos << pModule->ne_align;
368 if (pSeg->size) size = pSeg->size;
369 else size = pSeg->minsize ? pSeg->minsize : 0x10000;
370
371 if (pModule->ne_flags & NE_FFLAGS_SELFLOAD && segnum > 1)
372 {
373 /* Implement self-loading segments */
374 SELFLOADHEADER *selfloadheader;
375 void *oldstack;
376 HFILE16 hFile16;
377 WORD args[3];
378 DWORD ret;
379
380 selfloadheader = MapSL( MAKESEGPTR(SEL(pSegTable->hSeg),0) );
381 oldstack = NtCurrentTeb()->WOW32Reserved;
382 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(pModule->self_loading_sel,
383 0xff00 - sizeof(STACK16FRAME));
384
385 hFile16 = NE_OpenFile( pModule );
386 TRACE_(dll)("Call LoadAppSegProc(hmodule=0x%04x,hf=%x,segnum=%d)\n",
387 pModule->self,hFile16,segnum );
388 args[2] = pModule->self;
389 args[1] = hFile16;
390 args[0] = segnum;
391 WOWCallback16Ex( (DWORD)selfloadheader->LoadAppSeg, WCB16_PASCAL, sizeof(args), args, &ret );
392 pSeg->hSeg = LOWORD(ret);
393 TRACE_(dll)("Ret LoadAppSegProc: hSeg=0x%04x\n", pSeg->hSeg);
394 _lclose16( hFile16 );
395 NtCurrentTeb()->WOW32Reserved = oldstack;
396
397 pSeg->flags |= NE_SEGFLAGS_LOADED;
398 return TRUE;
399 }
400 else if (!(pSeg->flags & NE_SEGFLAGS_ITERATED))
401 {
402 void *mem = GlobalLock16(pSeg->hSeg);
403 if (!NE_READ_DATA( pModule, mem, pos, size ))
404 return FALSE;
405 pos += size;
406 }
407 else
408 {
409 /*
410 The following bit of code for "iterated segments" was written without
411 any documentation on the format of these segments. It seems to work,
412 but may be missing something.
413 */
414 const char *buff = NE_GET_DATA( pModule, pos, size );
415 const char* curr = buff;
416 char *mem = GlobalLock16(pSeg->hSeg);
417
418 pos += size;
419 if (buff == NULL) return FALSE;
420
421 while(curr < buff + size) {
422 unsigned int rept = ((const short *)curr)[0];
423 unsigned int len = ((const short *)curr)[1];
424
425 curr += 2*sizeof(short);
426 while (rept--)
427 {
428 memcpy( mem, curr, len );
429 mem += len;
430 }
431 curr += len;
432 }
433 }
434
435 pSeg->flags |= NE_SEGFLAGS_LOADED;
436
437 /* Perform exported function prolog fixups */
438 NE_FixupSegmentPrologs( pModule, segnum );
439
440 if (!(pSeg->flags & NE_SEGFLAGS_RELOC_DATA))
441 return TRUE; /* No relocation data, we are done */
442
443 if (!NE_READ_DATA( pModule, &count, pos, sizeof(count) ) || !count) return TRUE;
444 pos += sizeof(count);
445
446 TRACE("Fixups for %.*s, segment %d, hSeg %04x\n",
447 *((BYTE *)pModule + pModule->ne_restab),
448 (char *)pModule + pModule->ne_restab + 1,
449 segnum, pSeg->hSeg );
450
451 if (!(rep = NE_GET_DATA( pModule, pos, count * sizeof(struct relocation_entry_s) )))
452 return FALSE;
453
454 return apply_relocations( pModule, rep, count, segnum );
455 }
456
457
458 /***********************************************************************
459 * NE_LoadAllSegments
460 */
461 BOOL NE_LoadAllSegments( NE_MODULE *pModule )
462 {
463 int i;
464 SEGTABLEENTRY * pSegTable = NE_SEG_TABLE(pModule);
465
466 if (pModule->ne_flags & NE_FFLAGS_SELFLOAD)
467 {
468 HFILE16 hFile16;
469 HGLOBAL16 sel;
470 /* Handle self-loading modules */
471 SELFLOADHEADER *selfloadheader;
472 HMODULE16 mod = GetModuleHandle16("KERNEL");
473 void *oldstack;
474 WORD args[2];
475
476 TRACE_(module)("%.*s is a self-loading module!\n",
477 *((BYTE*)pModule + pModule->ne_restab),
478 (char *)pModule + pModule->ne_restab + 1);
479 if (!NE_LoadSegment( pModule, 1 )) return FALSE;
480 selfloadheader = MapSL( MAKESEGPTR(SEL(pSegTable->hSeg), 0) );
481 selfloadheader->EntryAddrProc = GetProcAddress16(mod,"EntryAddrProc");
482 selfloadheader->MyAlloc = GetProcAddress16(mod,"MyAlloc");
483 selfloadheader->SetOwner = GetProcAddress16(mod,"FarSetOwner");
484 sel = GlobalAlloc16( GMEM_ZEROINIT, 0xFF00 );
485 pModule->self_loading_sel = SEL(sel);
486 FarSetOwner16( sel, pModule->self );
487 oldstack = NtCurrentTeb()->WOW32Reserved;
488 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(pModule->self_loading_sel,
489 0xff00 - sizeof(STACK16FRAME) );
490
491 hFile16 = NE_OpenFile(pModule);
492 TRACE_(dll)("CallBootAppProc(hModule=0x%04x,hf=0x%04x)\n",
493 pModule->self,hFile16);
494 args[1] = pModule->self;
495 args[0] = hFile16;
496 WOWCallback16Ex( (DWORD)selfloadheader->BootApp, WCB16_PASCAL, sizeof(args), args, NULL );
497 TRACE_(dll)("Return from CallBootAppProc\n");
498 _lclose16(hFile16);
499 NtCurrentTeb()->WOW32Reserved = oldstack;
500
501 for (i = 2; i <= pModule->ne_cseg; i++)
502 if (!NE_LoadSegment( pModule, i )) return FALSE;
503 }
504 else
505 {
506 for (i = 1; i <= pModule->ne_cseg; i++)
507 if (!NE_LoadSegment( pModule, i )) return FALSE;
508 }
509 return TRUE;
510 }
511
512
513 /***********************************************************************
514 * NE_FixupSegmentPrologs
515 *
516 * Fixup exported functions prologs of one segment
517 */
518 static void NE_FixupSegmentPrologs(NE_MODULE *pModule, WORD segnum)
519 {
520 SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
521 ET_BUNDLE *bundle;
522 ET_ENTRY *entry;
523 WORD dgroup, num_entries, sel = SEL(pSegTable[segnum-1].hSeg);
524 BYTE *pSeg, *pFunc;
525
526 TRACE("(%d);\n", segnum);
527
528 if (pSegTable[segnum-1].flags & NE_SEGFLAGS_DATA)
529 {
530 pSegTable[segnum-1].flags |= NE_SEGFLAGS_LOADED;
531 return;
532 }
533
534 if (!pModule->ne_autodata) return;
535
536 if (!pSegTable[pModule->ne_autodata-1].hSeg) return;
537 dgroup = SEL(pSegTable[pModule->ne_autodata-1].hSeg);
538
539 pSeg = MapSL( MAKESEGPTR(sel, 0) );
540
541 bundle = (ET_BUNDLE *)((BYTE *)pModule+pModule->ne_enttab);
542
543 do {
544 TRACE("num_entries: %d, bundle: %p, next: %04x, pSeg: %p\n", bundle->last - bundle->first, bundle, bundle->next, pSeg);
545 if (!(num_entries = bundle->last - bundle->first))
546 return;
547 entry = (ET_ENTRY *)((BYTE *)bundle+6);
548 while (num_entries--)
549 {
550 /*TRACE("entry: %p, entry->segnum: %d, entry->offs: %04x\n", entry, entry->segnum, entry->offs);*/
551 if (entry->segnum == segnum)
552 {
553 pFunc = pSeg+entry->offs;
554 TRACE("pFunc: %p, *(DWORD *)pFunc: %08x, num_entries: %d\n", pFunc, *(DWORD *)pFunc, num_entries);
555 if (*(pFunc+2) == 0x90)
556 {
557 if (*(WORD *)pFunc == 0x581e) /* push ds, pop ax */
558 {
559 TRACE("patch %04x:%04x -> mov ax, ds\n", sel, entry->offs);
560 *(WORD *)pFunc = 0xd88c; /* mov ax, ds */
561 }
562
563 if (*(WORD *)pFunc == 0xd88c)
564 {
565 if ((entry->flags & 2)) /* public data ? */
566 {
567 TRACE("patch %04x:%04x -> mov ax, dgroup [%04x]\n", sel, entry->offs, dgroup);
568 *pFunc = 0xb8; /* mov ax, */
569 *(WORD *)(pFunc+1) = dgroup;
570 }
571 else if ((pModule->ne_flags & NE_FFLAGS_MULTIPLEDATA)
572 && (entry->flags & 1)) /* exported ? */
573 {
574 TRACE("patch %04x:%04x -> nop, nop\n", sel, entry->offs);
575 *(WORD *)pFunc = 0x9090; /* nop, nop */
576 }
577 }
578 }
579 }
580 entry++;
581 }
582 } while ( (bundle->next) && (bundle = ((ET_BUNDLE *)((BYTE *)pModule + bundle->next))) );
583 }
584
585
586 /***********************************************************************
587 * PatchCodeHandle (KERNEL.110)
588 *
589 * Needed for self-loading modules.
590 */
591 DWORD WINAPI PatchCodeHandle16(HANDLE16 hSeg)
592 {
593 WORD segnum;
594 WORD sel = SEL(hSeg);
595 NE_MODULE *pModule = NE_GetPtr(FarGetOwner16(sel));
596 SEGTABLEENTRY *pSegTable = NE_SEG_TABLE(pModule);
597
598 TRACE_(module)("(%04x);\n", hSeg);
599
600 /* find the segment number of the module that belongs to hSeg */
601 for (segnum = 1; segnum <= pModule->ne_cseg; segnum++)
602 {
603 if (SEL(pSegTable[segnum-1].hSeg) == sel)
604 {
605 NE_FixupSegmentPrologs(pModule, segnum);
606 break;
607 }
608 }
609
610 return MAKELONG(hSeg, sel);
611 }
612
613
614 /***********************************************************************
615 * NE_GetDLLInitParams
616 */
617 static VOID NE_GetDLLInitParams( NE_MODULE *pModule,
618 WORD *hInst, WORD *ds, WORD *heap )
619 {
620 SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
621
622 if (!(pModule->ne_flags & NE_FFLAGS_SINGLEDATA))
623 {
624 if (pModule->ne_flags & NE_FFLAGS_MULTIPLEDATA || pModule->ne_autodata)
625 {
626 /* Not SINGLEDATA */
627 ERR_(dll)("Library is not marked SINGLEDATA\n");
628 exit(1);
629 }
630 else /* DATA NONE DLL */
631 {
632 *ds = 0;
633 *heap = 0;
634 }
635 }
636 else /* DATA SINGLE DLL */
637 {
638 if (pModule->ne_autodata) {
639 *ds = SEL(pSegTable[pModule->ne_autodata-1].hSeg);
640 *heap = pModule->ne_heap;
641 }
642 else /* hmm, DLL has no dgroup,
643 but why has it NE_FFLAGS_SINGLEDATA set ?
644 Buggy DLL compiler ? */
645 {
646 *ds = 0;
647 *heap = 0;
648 }
649 }
650
651 *hInst = *ds ? GlobalHandle16(*ds) : pModule->self;
652 }
653
654
655 /***********************************************************************
656 * NE_InitDLL
657 *
658 * Call the DLL initialization code
659 */
660 static BOOL NE_InitDLL( NE_MODULE *pModule )
661 {
662 SEGTABLEENTRY *pSegTable;
663 WORD hInst, ds, heap;
664 CONTEXT context;
665
666 pSegTable = NE_SEG_TABLE( pModule );
667
668 if (!(pModule->ne_flags & NE_FFLAGS_LIBMODULE) ||
669 (pModule->ne_flags & NE_FFLAGS_WIN32)) return TRUE; /*not a library*/
670
671 /* Call USER signal handler for Win3.1 compatibility. */
672 NE_CallUserSignalProc( pModule->self, USIG16_DLL_LOAD );
673
674 if (!SELECTOROF(pModule->ne_csip)) return TRUE; /* no initialization code */
675
676
677 /* Registers at initialization must be:
678 * cx heap size
679 * di library instance
680 * ds data segment if any
681 * es:si command line (always 0)
682 */
683
684 memset( &context, 0, sizeof(context) );
685
686 NE_GetDLLInitParams( pModule, &hInst, &ds, &heap );
687
688 context.Ecx = heap;
689 context.Edi = hInst;
690 context.SegDs = ds;
691 context.SegEs = ds; /* who knows ... */
692 context.SegFs = wine_get_fs();
693 context.SegGs = wine_get_gs();
694 context.SegCs = SEL(pSegTable[SELECTOROF(pModule->ne_csip)-1].hSeg);
695 context.Eip = OFFSETOF(pModule->ne_csip);
696 context.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
697
698 pModule->ne_csip = 0; /* Don't initialize it twice */
699 TRACE_(dll)("Calling LibMain for %.*s, cs:ip=%04x:%04x ds=%04x di=%04x cx=%04x\n",
700 *((BYTE*)pModule + pModule->ne_restab),
701 (char *)pModule + pModule->ne_restab + 1,
702 context.SegCs, context.Eip, context.SegDs,
703 LOWORD(context.Edi), LOWORD(context.Ecx) );
704 WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&context );
705 return TRUE;
706 }
707
708 /***********************************************************************
709 * NE_InitializeDLLs
710 *
711 * Recursively initialize all DLLs (according to the order in which
712 * they where loaded).
713 */
714 void NE_InitializeDLLs( HMODULE16 hModule )
715 {
716 NE_MODULE *pModule;
717 HMODULE16 *pDLL;
718
719 if (!(pModule = NE_GetPtr( hModule ))) return;
720 assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
721
722 if (pModule->dlls_to_init)
723 {
724 HGLOBAL16 to_init = pModule->dlls_to_init;
725 pModule->dlls_to_init = 0;
726 for (pDLL = GlobalLock16( to_init ); *pDLL; pDLL++)
727 {
728 NE_InitializeDLLs( *pDLL );
729 }
730 GlobalFree16( to_init );
731 }
732 NE_InitDLL( pModule );
733 }
734
735
736 /**********************************************************************
737 * NE_CallUserSignalProc
738 *
739 * According to "Undocumented Windows", the task signal proc is
740 * bypassed for module load/unload notifications, and the USER signal
741 * proc is called directly instead. This is what this function does.
742 */
743 typedef DWORD (WINAPI *pSignalProc)( HANDLE16 module, UINT16 code, UINT16 exit,
744 HINSTANCE16 inst, HQUEUE16 queue );
745
746 void NE_CallUserSignalProc( HMODULE16 hModule, UINT16 code )
747 {
748 FARPROC16 proc;
749 HMODULE16 user = GetModuleHandle16("user.exe");
750
751 if (!user) return;
752 if ((proc = GetProcAddress16( user, "SignalProc" )))
753 {
754 /* USER is always a builtin dll */
755 pSignalProc sigproc = (pSignalProc)((ENTRYPOINT16 *)MapSL( (SEGPTR)proc ))->target;
756 sigproc( hModule, code, 0, 0, 0 );
757 }
758 }
759
760
761 /***********************************************************************
762 * NE_CallDllEntryPoint
763 *
764 * Call the DllEntryPoint of DLLs with subsystem >= 4.0
765 */
766 typedef DWORD (WINAPI *WinNEEntryProc)(DWORD,WORD,WORD,WORD,DWORD,WORD);
767
768 static void NE_CallDllEntryPoint( NE_MODULE *pModule, DWORD dwReason )
769 {
770 WORD hInst, ds, heap;
771 FARPROC16 entryPoint;
772
773 if (!(pModule->ne_flags & NE_FFLAGS_LIBMODULE)) return;
774 if (!(pModule->ne_flags & NE_FFLAGS_BUILTIN) && pModule->ne_expver < 0x0400) return;
775 if (!(entryPoint = GetProcAddress16( pModule->self, "DllEntryPoint" ))) return;
776
777 NE_GetDLLInitParams( pModule, &hInst, &ds, &heap );
778
779 TRACE_(dll)( "Calling %s DllEntryPoint, cs:ip=%04x:%04x\n",
780 NE_MODULE_NAME( pModule ),
781 SELECTOROF(entryPoint), OFFSETOF(entryPoint) );
782
783 if ( pModule->ne_flags & NE_FFLAGS_BUILTIN )
784 {
785 WinNEEntryProc entryProc = (WinNEEntryProc)((ENTRYPOINT16 *)MapSL( (SEGPTR)entryPoint ))->target;
786
787 entryProc( dwReason, hInst, ds, heap, 0, 0 );
788 }
789 else
790 {
791 CONTEXT context;
792 WORD args[8];
793
794 memset( &context, 0, sizeof(context) );
795 context.SegDs = ds;
796 context.SegEs = ds; /* who knows ... */
797 context.SegFs = wine_get_fs();
798 context.SegGs = wine_get_gs();
799 context.SegCs = HIWORD(entryPoint);
800 context.Eip = LOWORD(entryPoint);
801 context.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
802
803 args[7] = HIWORD(dwReason);
804 args[6] = LOWORD(dwReason);
805 args[5] = hInst;
806 args[4] = ds;
807 args[3] = heap;
808 args[2] = 0; /* HIWORD(dwReserved1) */
809 args[1] = 0; /* LOWORD(dwReserved1) */
810 args[0] = 0; /* wReserved2 */
811 WOWCallback16Ex( 0, WCB16_REGS, sizeof(args), args, (DWORD *)&context );
812 }
813 }
814
815 /***********************************************************************
816 * NE_DllProcessAttach
817 *
818 * Call the DllEntryPoint of all modules this one (recursively)
819 * depends on, according to the order in which they were loaded.
820 *
821 * Note that --as opposed to the PE module case-- there is no notion
822 * of 'module loaded into a process' for NE modules, and hence we
823 * have no place to store the fact that the DllEntryPoint of a
824 * given module was already called on behalf of this process (e.g.
825 * due to some earlier LoadLibrary16 call).
826 *
827 * Thus, we just call the DllEntryPoint twice in that case. Win9x
828 * appears to behave this way as well ...
829 *
830 * This routine must only be called with the Win16Lock held.
831 *
832 * FIXME: We should actually abort loading in case the DllEntryPoint
833 * returns FALSE ...
834 *
835 */
836
837 struct ne_init_list
838 {
839 int count;
840 int size;
841 NE_MODULE **module;
842 };
843
844 static void add_to_init_list( struct ne_init_list *list, NE_MODULE *hModule )
845 {
846 NE_MODULE **newModule = NULL;
847 if ( list->count == list->size )
848 {
849 int newSize = list->size + 128;
850
851 if (list->module)
852 newModule = HeapReAlloc( GetProcessHeap(), 0,
853 list->module, newSize*sizeof(NE_MODULE *) );
854 else
855 newModule = HeapAlloc( GetProcessHeap(), 0,
856 newSize*sizeof(NE_MODULE *) );
857 if ( !newModule )
858 {
859 FIXME_(dll)("Out of memory!\n");
860 return;
861 }
862
863 list->module = newModule;
864 list->size = newSize;
865 }
866
867 list->module[list->count++] = hModule;
868 }
869
870 static void free_init_list( struct ne_init_list *list )
871 {
872 if ( list->module )
873 {
874 HeapFree( GetProcessHeap(), 0, list->module );
875 memset( list, 0, sizeof(*list) );
876 }
877 }
878
879 static void fill_init_list( struct ne_init_list *list, HMODULE16 hModule )
880 {
881 NE_MODULE *pModule;
882 HMODULE16 *pModRef;
883 int i;
884
885 if (!(pModule = NE_GetPtr( hModule ))) return;
886 assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
887
888 /* Never add a module twice */
889 for ( i = 0; i < list->count; i++ )
890 if ( list->module[i] == pModule )
891 return;
892
893 /* Check for recursive call */
894 if ( pModule->ne_flagsothers & 0x80 ) return;
895
896 TRACE_(dll)("(%s) - START\n", NE_MODULE_NAME(pModule) );
897
898 /* Tag current module to prevent recursive loop */
899 pModule->ne_flagsothers |= 0x80;
900
901 /* Recursively attach all DLLs this one depends on */
902 pModRef = (HMODULE16 *)((char *)pModule + pModule->ne_modtab);
903 for ( i = 0; i < pModule->ne_cmod; i++ )
904 if ( pModRef[i] ) fill_init_list( list, pModRef[i] );
905
906 /* Add current module */
907 add_to_init_list( list, pModule );
908
909 /* Remove recursion flag */
910 pModule->ne_flagsothers &= ~0x80;
911
912 TRACE_(dll)("(%s) - END\n", NE_MODULE_NAME(pModule) );
913 }
914
915 static void call_init_list( struct ne_init_list *list )
916 {
917 int i;
918 for ( i = 0; i < list->count; i++ )
919 NE_CallDllEntryPoint( list->module[i], DLL_PROCESS_ATTACH );
920 }
921
922 void NE_DllProcessAttach( HMODULE16 hModule )
923 {
924 struct ne_init_list list;
925 memset( &list, 0, sizeof(list) );
926
927 fill_init_list( &list, hModule );
928 call_init_list( &list );
929 free_init_list( &list );
930 }
931
932
933 /***********************************************************************
934 * NE_Ne2MemFlags
935 *
936 * This function translates NE segment flags to GlobalAlloc flags
937 */
938 static WORD NE_Ne2MemFlags(WORD flags)
939 {
940 WORD memflags = 0;
941 #if 1
942 if (flags & NE_SEGFLAGS_DISCARDABLE)
943 memflags |= GMEM_DISCARDABLE;
944 if (flags & NE_SEGFLAGS_MOVEABLE ||
945 ( ! (flags & NE_SEGFLAGS_DATA) &&
946 ! (flags & NE_SEGFLAGS_LOADED) &&
947 ! (flags & NE_SEGFLAGS_ALLOCATED)
948 )
949 )
950 memflags |= GMEM_MOVEABLE;
951 memflags |= GMEM_ZEROINIT;
952 #else
953 memflags = GMEM_ZEROINIT | GMEM_FIXED;
954 #endif
955 return memflags;
956 }
957
958 /***********************************************************************
959 * MyAlloc (KERNEL.668) Wine-specific export
960 *
961 * MyAlloc() function for self-loading apps.
962 */
963 DWORD WINAPI MyAlloc16( WORD wFlags, WORD wSize, WORD wElem )
964 {
965 WORD size = wSize << wElem;
966 HANDLE16 hMem = 0;
967
968 if (wSize || (wFlags & NE_SEGFLAGS_MOVEABLE))
969 hMem = GlobalAlloc16( NE_Ne2MemFlags(wFlags), size);
970
971 if ( ((wFlags & 0x7) != 0x1) && /* DATA */
972 ((wFlags & 0x7) != 0x7) ) /* DATA|ALLOCATED|LOADED */
973 {
974 WORD hSel = SEL(hMem);
975 WORD access = SelectorAccessRights16(hSel,0,0);
976
977 access |= 2<<2; /* SEGMENT_CODE */
978 SelectorAccessRights16(hSel,1,access);
979 }
980 if (size)
981 return MAKELONG( hMem, SEL(hMem) );
982 else
983 return MAKELONG( 0, hMem );
984 }
985
986 /***********************************************************************
987 * NE_GetInstance
988 */
989 HINSTANCE16 NE_GetInstance( NE_MODULE *pModule )
990 {
991 if ( !pModule->ne_autodata )
992 return pModule->self;
993 else
994 {
995 SEGTABLEENTRY *pSeg;
996 pSeg = NE_SEG_TABLE( pModule ) + pModule->ne_autodata - 1;
997 return pSeg->hSeg;
998 }
999 }
1000
1001 /***********************************************************************
1002 * NE_CreateSegment
1003 */
1004 BOOL NE_CreateSegment( NE_MODULE *pModule, int segnum )
1005 {
1006 SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + segnum - 1;
1007 int minsize;
1008 unsigned char selflags;
1009
1010 assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
1011
1012 if ( segnum < 1 || segnum > pModule->ne_cseg )
1013 return FALSE;
1014
1015 if ( (pModule->ne_flags & NE_FFLAGS_SELFLOAD) && segnum != 1 )
1016 return TRUE; /* selfloader allocates segment itself */
1017
1018 if ( (pSeg->flags & NE_SEGFLAGS_ALLOCATED) && segnum != pModule->ne_autodata )
1019 return TRUE; /* all but DGROUP only allocated once */
1020
1021 minsize = pSeg->minsize ? pSeg->minsize : 0x10000;
1022 if ( segnum == SELECTOROF(pModule->ne_sssp) ) minsize += pModule->ne_stack;
1023 if ( segnum == pModule->ne_autodata ) minsize += pModule->ne_heap;
1024
1025 selflags = (pSeg->flags & NE_SEGFLAGS_DATA) ? WINE_LDT_FLAGS_DATA : WINE_LDT_FLAGS_CODE;
1026 if (pSeg->flags & NE_SEGFLAGS_32BIT) selflags |= WINE_LDT_FLAGS_32BIT;
1027 pSeg->hSeg = GLOBAL_Alloc( NE_Ne2MemFlags(pSeg->flags), minsize, pModule->self, selflags );
1028 if (!pSeg->hSeg) return FALSE;
1029
1030 pSeg->flags |= NE_SEGFLAGS_ALLOCATED;
1031 return TRUE;
1032 }
1033
1034 /***********************************************************************
1035 * NE_CreateAllSegments
1036 */
1037 BOOL NE_CreateAllSegments( NE_MODULE *pModule )
1038 {
1039 int i;
1040 for ( i = 1; i <= pModule->ne_cseg; i++ )
1041 if ( !NE_CreateSegment( pModule, i ) )
1042 return FALSE;
1043
1044 pModule->dgroup_entry = pModule->ne_autodata ? pModule->ne_segtab +
1045 (pModule->ne_autodata - 1) * sizeof(SEGTABLEENTRY) : 0;
1046 return TRUE;
1047 }
1048
1049
1050 /**********************************************************************
1051 * IsSharedSelector (KERNEL.345)
1052 */
1053 BOOL16 WINAPI IsSharedSelector16( HANDLE16 selector )
1054 {
1055 /* Check whether the selector belongs to a DLL */
1056 NE_MODULE *pModule = NE_GetPtr( selector );
1057 if (!pModule) return FALSE;
1058 return (pModule->ne_flags & NE_FFLAGS_LIBMODULE) != 0;
1059 }
Windows API implementation