memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #include <assert.h>
  10 #include <errno.h>
  11 #ifdef HAVE_SYS_ERRNO_H
  12 #include <sys/errno.h>
  13 #endif
  14 #include <fcntl.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <string.h>
  19 #include <sys/types.h>
  20 #ifdef HAVE_SYS_MMAN_H
  21 #include <sys/mman.h>
  22 #endif
  23 #include "winnls.h"
  24 #include "winbase.h"
  25 #include "wine/exception.h"
  26 #include "wine/unicode.h"
  27 #include "wine/library.h"
  28 #include "wine/port.h"
  29 #include "winerror.h"
  30 #include "file.h"
  31 #include "global.h"
  32 #include "server.h"
  33 #include "debugtools.h"
  34
  35 DEFAULT_DEBUG_CHANNEL(virtual);
  36 DECLARE_DEBUG_CHANNEL(module);
  37
  38 #ifndef MS_SYNC
  39 #define MS_SYNC 0
  40 #endif
  41
  42 /* File view */
  43 typedef struct _FV
  44 {
  45     struct _FV   *next;        /* Next view */
  46     struct _FV   *prev;        /* Prev view */
  47     UINT        base;        /* Base address */
  48     UINT        size;        /* Size in bytes */
  49     UINT        flags;       /* Allocation flags */
  50     HANDLE      mapping;     /* Handle to the file mapping */
  51     HANDLERPROC   handlerProc; /* Fault handler */
  52     LPVOID        handlerArg;  /* Fault handler argument */
  53     BYTE          protect;     /* Protection for all pages at allocation time */
  54     BYTE          prot[1];     /* Protection byte for each page */
  55 } FILE_VIEW;
  56
  57 /* Per-view flags */
  58 #define VFLAG_SYSTEM     0x01
  59
  60 /* Conversion from VPROT_* to Win32 flags */
  61 static const BYTE VIRTUAL_Win32Flags[16] =
  62 {
  63     PAGE_NOACCESS,              /* 0 */
  64     PAGE_READONLY,              /* READ */
  65     PAGE_READWRITE,             /* WRITE */
  66     PAGE_READWRITE,             /* READ | WRITE */
  67     PAGE_EXECUTE,               /* EXEC */
  68     PAGE_EXECUTE_READ,          /* READ | EXEC */
  69     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  70     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  71     PAGE_WRITECOPY,             /* WRITECOPY */
  72     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  73     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  74     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  75     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  77     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  78     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  79 };
  80
  81
  82 static FILE_VIEW *VIRTUAL_FirstView;
  83 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT;
  84
  85 #ifdef __i386__
  86 /* These are always the same on an i386, and it will be faster this way */
  87 # define page_mask  0xfff
  88 # define page_shift 12
  89 # define page_size  0x1000
  90 #else
  91 static UINT page_shift;
  92 static UINT page_mask;
  93 static UINT page_size;
  94 #endif  /* __i386__ */
  95 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
  96
  97 #define ROUND_ADDR(addr) \
  98    ((UINT)(addr) & ~page_mask)
  99
 100 #define ROUND_SIZE(addr,size) \
 101    (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
 102
 103 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 104    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 105
 106 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset, int prot, int flags );
 107
 108 /* filter for page-fault exceptions */
 109 static WINE_EXCEPTION_FILTER(page_fault)
 110 {
 111     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 112         return EXCEPTION_EXECUTE_HANDLER;
 113     return EXCEPTION_CONTINUE_SEARCH;
 114 }
 115
 116 /***********************************************************************
 117  *           VIRTUAL_GetProtStr
 118  */
 119 static const char *VIRTUAL_GetProtStr( BYTE prot )
 120 {
 121     static char buffer[6];
 122     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 123     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 124     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 125     buffer[3] = (prot & VPROT_WRITE) ?
 126                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 127     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 128     buffer[5] = 0;
 129     return buffer;
 130 }
 131
 132
 133 /***********************************************************************
 134  *           VIRTUAL_DumpView
 135  */
 136 static void VIRTUAL_DumpView( FILE_VIEW *view )
 137 {
 138     UINT i, count;
 139     UINT addr = view->base;
 140     BYTE prot = view->prot[0];
 141
 142     DPRINTF( "View: %08x - %08x%s",
 143           view->base, view->base + view->size - 1,
 144           (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 145     if (view->mapping)
 146         DPRINTF( " %d\n", view->mapping );
 147     else
 148         DPRINTF( " (anonymous)\n");
 149
 150     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 151     {
 152         if (view->prot[i] == prot) continue;
 153         DPRINTF( "      %08x - %08x %s\n",
 154               addr, addr + (count << page_shift) - 1,
 155               VIRTUAL_GetProtStr(prot) );
 156         addr += (count << page_shift);
 157         prot = view->prot[i];
 158         count = 0;
 159     }
 160     if (count)
 161         DPRINTF( "      %08x - %08x %s\n",
 162               addr, addr + (count << page_shift) - 1,
 163               VIRTUAL_GetProtStr(prot) );
 164 }
 165
 166
 167 /***********************************************************************
 168  *           VIRTUAL_Dump
 169  */
 170 void VIRTUAL_Dump(void)
 171 {
 172     FILE_VIEW *view;
 173     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 174     EnterCriticalSection(&csVirtual);
 175     view = VIRTUAL_FirstView;
 176     while (view)
 177     {
 178         VIRTUAL_DumpView( view );
 179         view = view->next;
 180     }
 181     LeaveCriticalSection(&csVirtual);
 182 }
 183
 184
 185 /***********************************************************************
 186  *           VIRTUAL_FindView
 187  *
 188  * Find the view containing a given address.
 189  *
 190  * RETURNS
 191  *      View: Success
 192  *      NULL: Failure
 193  */
 194 static FILE_VIEW *VIRTUAL_FindView(
 195                   UINT addr /* [in] Address */
 196 ) {
 197     FILE_VIEW *view;
 198
 199     EnterCriticalSection(&csVirtual);
 200     view = VIRTUAL_FirstView;
 201     while (view)
 202     {
 203         if (view->base > addr)
 204         {
 205             view = NULL;
 206             break;
 207         }
 208         if (view->base + view->size > addr) break;
 209         view = view->next;
 210     }
 211     LeaveCriticalSection(&csVirtual);
 212     return view;
 213 }
 214
 215
 216 /***********************************************************************
 217  *           VIRTUAL_CreateView
 218  *
 219  * Create a new view and add it in the linked list.
 220  */
 221 static FILE_VIEW *VIRTUAL_CreateView( UINT base, UINT size, UINT flags,
 222                                       BYTE vprot, HANDLE mapping )
 223 {
 224     FILE_VIEW *view, *prev;
 225
 226     /* Create the view structure */
 227
 228     assert( !(base & page_mask) );
 229     assert( !(size & page_mask) );
 230     size >>= page_shift;
 231     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 232     view->base    = base;
 233     view->size    = size << page_shift;
 234     view->flags   = flags;
 235     view->mapping = mapping;
 236     view->protect = vprot;
 237     view->handlerProc = NULL;
 238     memset( view->prot, vprot, size );
 239
 240     /* Duplicate the mapping handle */
 241
 242     if (view->mapping &&
 243         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 244                           GetCurrentProcess(), &view->mapping,
 245                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 246     {
 247         free( view );
 248         return NULL;
 249     }
 250
 251     /* Insert it in the linked list */
 252
 253     EnterCriticalSection(&csVirtual);
 254     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 255     {
 256         view->next = VIRTUAL_FirstView;
 257         view->prev = NULL;
 258         if (view->next) view->next->prev = view;
 259         VIRTUAL_FirstView = view;
 260     }
 261     else
 262     {
 263         prev = VIRTUAL_FirstView;
 264         while (prev->next && (prev->next->base < base)) prev = prev->next;
 265         view->next = prev->next;
 266         view->prev = prev;
 267         if (view->next) view->next->prev = view;
 268         prev->next  = view;
 269     }
 270     LeaveCriticalSection(&csVirtual);
 271     VIRTUAL_DEBUG_DUMP_VIEW( view );
 272     return view;
 273 }
 274
 275
 276 /***********************************************************************
 277  *           VIRTUAL_DeleteView
 278  * Deletes a view.
 279  *
 280  * RETURNS
 281  *      None
 282  */
 283 static void VIRTUAL_DeleteView(
 284             FILE_VIEW *view /* [in] View */
 285 ) {
 286     if (!(view->flags & VFLAG_SYSTEM))
 287         munmap( (void *)view->base, view->size );
 288     EnterCriticalSection(&csVirtual);
 289     if (view->next) view->next->prev = view->prev;
 290     if (view->prev) view->prev->next = view->next;
 291     else VIRTUAL_FirstView = view->next;
 292     LeaveCriticalSection(&csVirtual);
 293     if (view->mapping) NtClose( view->mapping );
 294     free( view );
 295 }
 296
 297
 298 /***********************************************************************
 299  *           VIRTUAL_GetUnixProt
 300  *
 301  * Convert page protections to protection for mmap/mprotect.
 302  */
 303 static int VIRTUAL_GetUnixProt( BYTE vprot )
 304 {
 305     int prot = 0;
 306     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 307     {
 308         if (vprot & VPROT_READ) prot |= PROT_READ;
 309         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 310         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 311         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 312     }
 313     return prot;
 314 }
 315
 316
 317 /***********************************************************************
 318  *           VIRTUAL_GetWin32Prot
 319  *
 320  * Convert page protections to Win32 flags.
 321  *
 322  * RETURNS
 323  *      None
 324  */
 325 static void VIRTUAL_GetWin32Prot(
 326             BYTE vprot,     /* [in] Page protection flags */
 327             DWORD *protect, /* [out] Location to store Win32 protection flags */
 328             DWORD *state    /* [out] Location to store mem state flag */
 329 ) {
 330     if (protect) {
 331         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 332 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 333         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 334
 335         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 336     }
 337
 338     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 339 }
 340
 341
 342 /***********************************************************************
 343  *           VIRTUAL_GetProt
 344  *
 345  * Build page protections from Win32 flags.
 346  *
 347  * RETURNS
 348  *      Value of page protection flags
 349  */
 350 static BYTE VIRTUAL_GetProt(
 351             DWORD protect  /* [in] Win32 protection flags */
 352 ) {
 353     BYTE vprot;
 354
 355     switch(protect & 0xff)
 356     {
 357     case PAGE_READONLY:
 358         vprot = VPROT_READ;
 359         break;
 360     case PAGE_READWRITE:
 361         vprot = VPROT_READ | VPROT_WRITE;
 362         break;
 363     case PAGE_WRITECOPY:
 364         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 365         break;
 366     case PAGE_EXECUTE:
 367         vprot = VPROT_EXEC;
 368         break;
 369     case PAGE_EXECUTE_READ:
 370         vprot = VPROT_EXEC | VPROT_READ;
 371         break;
 372     case PAGE_EXECUTE_READWRITE:
 373         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 374         break;
 375     case PAGE_EXECUTE_WRITECOPY:
 376         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 377         break;
 378     case PAGE_NOACCESS:
 379     default:
 380         vprot = 0;
 381         break;
 382     }
 383     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 384     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 385     return vprot;
 386 }
 387
 388
 389 /***********************************************************************
 390  *           VIRTUAL_SetProt
 391  *
 392  * Change the protection of a range of pages.
 393  *
 394  * RETURNS
 395  *      TRUE: Success
 396  *      FALSE: Failure
 397  */
 398 static BOOL VIRTUAL_SetProt(
 399               FILE_VIEW *view, /* [in] Pointer to view */
 400               UINT base,     /* [in] Starting address */
 401               UINT size,     /* [in] Size in bytes */
 402               BYTE vprot       /* [in] Protections to use */
 403 ) {
 404     TRACE("%08x-%08x %s\n",
 405                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 406
 407     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 408         return FALSE;  /* FIXME: last error */
 409
 410     memset( view->prot + ((base - view->base) >> page_shift),
 411             vprot, size >> page_shift );
 412     VIRTUAL_DEBUG_DUMP_VIEW( view );
 413     return TRUE;
 414 }
 415
 416
 417 /***********************************************************************
 418  *           map_image
 419  *
 420  * Map an executable (PE format) image into memory.
 421  */
 422 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 423                          DWORD header_size, HANDLE shared_file, DWORD shared_size )
 424 {
 425     IMAGE_DOS_HEADER *dos;
 426     IMAGE_NT_HEADERS *nt;
 427     IMAGE_SECTION_HEADER *sec;
 428     int i, pos;
 429     DWORD err = GetLastError();
 430     FILE_VIEW *view = NULL;
 431     char *ptr;
 432     int shared_fd = -1;
 433
 434     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 435
 436     /* zero-map the whole range */
 437
 438     if ((ptr = wine_anon_mmap( base, total_size,
 439                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 440     {
 441         ptr = wine_anon_mmap( NULL, total_size,
 442                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 443         if (ptr == (char *)-1)
 444         {
 445             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 446             goto error;
 447         }
 448     }
 449     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 450
 451     if (!(view = VIRTUAL_CreateView( (UINT)ptr, total_size, 0,
 452                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 453                                      hmapping )))
 454     {
 455         munmap( ptr, total_size );
 456         SetLastError( ERROR_OUTOFMEMORY );
 457         goto error;
 458     }
 459
 460     /* map the header */
 461
 462     if (VIRTUAL_mmap( fd, ptr, header_size, 0, PROT_READ | PROT_WRITE,
 463                       MAP_PRIVATE | MAP_FIXED ) == (char *)-1) goto error;
 464     dos = (IMAGE_DOS_HEADER *)ptr;
 465     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 466     if ((char *)(nt + 1) > ptr + header_size) goto error;
 467
 468     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 469     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 470
 471     /* check the architecture */
 472
 473     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 474     {
 475         MESSAGE("Trying to load PE image for unsupported architecture (");
 476         switch (nt->FileHeader.Machine)
 477         {
 478         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 479         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 480         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 481         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 482         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 483         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 484         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 485         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 486         }
 487         MESSAGE(")\n");
 488         goto error;
 489     }
 490
 491     /* retrieve the shared sections file */
 492
 493     if (shared_size)
 494     {
 495         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 496         CloseHandle( shared_file );  /* we no longer need it */
 497         shared_file = 0;
 498     }
 499
 500     /* map all the sections */
 501
 502     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 503     {
 504         DWORD size;
 505
 506         /* a few sanity checks */
 507         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 508         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 509         {
 510             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 511                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 512             goto error;
 513         }
 514
 515         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 516             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 517         {
 518             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 519             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 520                           sec->Name, (char *)ptr + sec->VirtualAddress,
 521                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 522                           size, sec->Characteristics );
 523             if (VIRTUAL_mmap( shared_fd, (char *)ptr + sec->VirtualAddress, size,
 524                               pos, PROT_READ|PROT_WRITE|PROT_EXEC,
 525                               MAP_SHARED|MAP_FIXED ) == (void *)-1)
 526             {
 527                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 528                 goto error;
 529             }
 530             pos += size;
 531             continue;
 532         }
 533
 534         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 535         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 536
 537         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 538                         sec->Name, (char *)ptr + sec->VirtualAddress,
 539                         sec->PointerToRawData, sec->SizeOfRawData,
 540                         sec->Characteristics );
 541
 542         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 543          *       fall back to read(), so we don't need to check anything here.
 544          */
 545         if (VIRTUAL_mmap( fd, (char *)ptr + sec->VirtualAddress, sec->SizeOfRawData,
 546                           sec->PointerToRawData, PROT_READ|PROT_WRITE|PROT_EXEC,
 547                           MAP_PRIVATE | MAP_FIXED ) == (void *)-1)
 548         {
 549             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 550             goto error;
 551         }
 552
 553         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 554         {
 555             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 556             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 557             TRACE_(module)("clearing %p - %p\n",
 558                            (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData,
 559                            (char *)ptr + sec->VirtualAddress + end );
 560             memset( (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 561                     end - sec->SizeOfRawData );
 562         }
 563     }
 564
 565     SetLastError( err );  /* restore last error */
 566     close( fd );
 567     if (shared_fd != -1) close( shared_fd );
 568     return ptr;
 569
 570  error:
 571     if (view) VIRTUAL_DeleteView( view );
 572     close( fd );
 573     if (shared_fd != -1) close( shared_fd );
 574     if (shared_file) CloseHandle( shared_file );
 575     return NULL;
 576 }
 577
 578
 579 /***********************************************************************
 580  *           VIRTUAL_Init
 581  */
 582 #ifndef page_mask
 583 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 584 {
 585     page_size = getpagesize();
 586     page_mask = page_size - 1;
 587     /* Make sure we have a power of 2 */
 588     assert( !(page_size & page_mask) );
 589     page_shift = 0;
 590     while ((1 << page_shift) != page_size) page_shift++;
 591 }
 592 #endif  /* page_mask */
 593
 594
 595 /***********************************************************************
 596  *           VIRTUAL_SetFaultHandler
 597  */
 598 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 599 {
 600     FILE_VIEW *view;
 601
 602     if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
 603     view->handlerProc = proc;
 604     view->handlerArg  = arg;
 605     return TRUE;
 606 }
 607
 608 /***********************************************************************
 609  *           VIRTUAL_HandleFault
 610  */
 611 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 612 {
 613     FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
 614     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 615
 616     if (view)
 617     {
 618         if (view->handlerProc)
 619         {
 620             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 621         }
 622         else
 623         {
 624             BYTE vprot = view->prot[((UINT)addr - view->base) >> page_shift];
 625             UINT page = (UINT)addr & ~page_mask;
 626             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 627             if (vprot & VPROT_GUARD)
 628             {
 629                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 630                 ret = STATUS_GUARD_PAGE_VIOLATION;
 631             }
 632             /* is it inside the stack guard pages? */
 633             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 634                 ret = STATUS_STACK_OVERFLOW;
 635         }
 636     }
 637     return ret;
 638 }
 639
 640
 641 /***********************************************************************
 642  *           VIRTUAL_mmap
 643  *
 644  * Wrapper for mmap() that handles anonymous mappings portably,
 645  * and falls back to read if mmap of a file fails.
 646  */
 647 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 648                             DWORD offset, int prot, int flags )
 649 {
 650     int pos;
 651     LPVOID ret;
 652
 653     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 654
 655     if ((ret = mmap( start, size, prot, flags, fd, offset )) != (LPVOID)-1)
 656         return ret;
 657
 658     /* mmap() failed; if this is because the file offset is not    */
 659     /* page-aligned (EINVAL), or because the underlying filesystem */
 660     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 661
 662     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 663     if (prot & PROT_WRITE)
 664     {
 665         /* We cannot fake shared write mappings */
 666 #ifdef MAP_SHARED
 667         if (flags & MAP_SHARED) return ret;
 668 #endif
 669 #ifdef MAP_PRIVATE
 670         if (!(flags & MAP_PRIVATE)) return ret;
 671 #endif
 672     }
 673
 674     /* Reserve the memory with an anonymous mmap */
 675     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 676     if (ret == (LPVOID)-1) return ret;
 677     /* Now read in the file */
 678     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 679     {
 680         munmap( ret, size );
 681         return (LPVOID)-1;
 682     }
 683     read( fd, ret, size );
 684     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 685     mprotect( ret, size, prot );  /* Set the right protection */
 686     return ret;
 687 }
 688
 689
 690 /***********************************************************************
 691  *             VirtualAlloc   (KERNEL32.548)
 692  * Reserves or commits a region of pages in virtual address space
 693  *
 694  * RETURNS
 695  *      Base address of allocated region of pages
 696  *      NULL: Failure
 697  */
 698 LPVOID WINAPI VirtualAlloc(
 699               LPVOID addr,  /* [in] Address of region to reserve or commit */
 700               DWORD size,   /* [in] Size of region */
 701               DWORD type,   /* [in] Type of allocation */
 702               DWORD protect /* [in] Type of access protection */
 703 ) {
 704     FILE_VIEW *view;
 705     UINT base, ptr, view_size;
 706     BYTE vprot;
 707
 708     TRACE("%08x %08lx %lx %08lx\n",
 709                      (UINT)addr, size, type, protect );
 710
 711     /* Round parameters to a page boundary */
 712
 713     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 714     {
 715         SetLastError( ERROR_OUTOFMEMORY );
 716         return NULL;
 717     }
 718     if (addr)
 719     {
 720         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 721             base = (UINT)addr & ~granularity_mask;
 722         else
 723             base = ROUND_ADDR( addr );
 724         size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
 725         if ((base <= granularity_mask) || (base + size < base))
 726         {
 727             /* disallow low 64k and wrap-around */
 728             SetLastError( ERROR_INVALID_PARAMETER );
 729             return NULL;
 730         }
 731     }
 732     else
 733     {
 734         base = 0;
 735         size = (size + page_mask) & ~page_mask;
 736     }
 737
 738     if (type & MEM_TOP_DOWN) {
 739         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 740          *        Is there _ANY_ way to do it with UNIX mmap()?
 741          */
 742         WARN("MEM_TOP_DOWN ignored\n");
 743         type &= ~MEM_TOP_DOWN;
 744     }
 745     /* Compute the alloc type flags */
 746
 747     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 748         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 749     {
 750         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 751         SetLastError( ERROR_INVALID_PARAMETER );
 752         return NULL;
 753     }
 754     if (type & (MEM_COMMIT | MEM_SYSTEM))
 755         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 756     else vprot = 0;
 757
 758     /* Reserve the memory */
 759
 760     if ((type & MEM_RESERVE) || !base)
 761     {
 762         view_size = size + (base ? 0 : granularity_mask + 1);
 763         if (type & MEM_SYSTEM)
 764              ptr = base;
 765         else
 766             ptr = (UINT)wine_anon_mmap( (LPVOID)base, view_size, VIRTUAL_GetUnixProt( vprot ), 0 );
 767         if (ptr == (UINT)-1)
 768         {
 769             SetLastError( ERROR_OUTOFMEMORY );
 770             return NULL;
 771         }
 772         if (!base)
 773         {
 774             /* Release the extra memory while keeping the range */
 775             /* starting on a 64k boundary. */
 776
 777             if (ptr & granularity_mask)
 778             {
 779                 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
 780                 munmap( (void *)ptr, extra );
 781                 ptr += extra;
 782                 view_size -= extra;
 783             }
 784             if (view_size > size)
 785                 munmap( (void *)(ptr + size), view_size - size );
 786         }
 787         else if (ptr != base)
 788         {
 789             /* We couldn't get the address we wanted */
 790             munmap( (void *)ptr, view_size );
 791             SetLastError( ERROR_INVALID_ADDRESS );
 792             return NULL;
 793         }
 794         if (!(view = VIRTUAL_CreateView( ptr, size, (type & MEM_SYSTEM) ?
 795                                          VFLAG_SYSTEM : 0, vprot, 0 )))
 796         {
 797             munmap( (void *)ptr, size );
 798             SetLastError( ERROR_OUTOFMEMORY );
 799             return NULL;
 800         }
 801         return (LPVOID)ptr;
 802     }
 803
 804     /* Commit the pages */
 805
 806     if (!(view = VIRTUAL_FindView( base )) ||
 807         (base + size > view->base + view->size))
 808     {
 809         SetLastError( ERROR_INVALID_ADDRESS );
 810         return NULL;
 811     }
 812
 813     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 814     return (LPVOID)base;
 815 }
 816
 817
 818 /***********************************************************************
 819  *             VirtualAllocEx   (KERNEL32.548)
 820  *
 821  * Seems to be just as VirtualAlloc, but with process handle.
 822  */
 823 LPVOID WINAPI VirtualAllocEx(
 824               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 825               LPVOID addr,  /* [in] Address of region to reserve or commit */
 826               DWORD size,   /* [in] Size of region */
 827               DWORD type,   /* [in] Type of allocation */
 828               DWORD protect /* [in] Type of access protection */
 829 ) {
 830     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 831         return VirtualAlloc( addr, size, type, protect );
 832     ERR("Unsupported on other process\n");
 833     return NULL;
 834 }
 835
 836
 837 /***********************************************************************
 838  *             VirtualFree   (KERNEL32.550)
 839  * Release or decommits a region of pages in virtual address space.
 840  *
 841  * RETURNS
 842  *      TRUE: Success
 843  *      FALSE: Failure
 844  */
 845 BOOL WINAPI VirtualFree(
 846               LPVOID addr, /* [in] Address of region of committed pages */
 847               DWORD size,  /* [in] Size of region */
 848               DWORD type   /* [in] Type of operation */
 849 ) {
 850     FILE_VIEW *view;
 851     UINT base;
 852
 853     TRACE("%08x %08lx %lx\n",
 854                      (UINT)addr, size, type );
 855
 856     /* Fix the parameters */
 857
 858     size = ROUND_SIZE( addr, size );
 859     base = ROUND_ADDR( addr );
 860
 861     if (!(view = VIRTUAL_FindView( base )) ||
 862         (base + size > view->base + view->size))
 863     {
 864         SetLastError( ERROR_INVALID_PARAMETER );
 865         return FALSE;
 866     }
 867
 868     /* Compute the protection flags */
 869
 870     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 871     {
 872         ERR("called with wrong free type flags (%08lx) !\n", type);
 873         SetLastError( ERROR_INVALID_PARAMETER );
 874         return FALSE;
 875     }
 876
 877     /* Free the pages */
 878
 879     if (type == MEM_RELEASE)
 880     {
 881         if (size || (base != view->base))
 882         {
 883             SetLastError( ERROR_INVALID_PARAMETER );
 884             return FALSE;
 885         }
 886         VIRTUAL_DeleteView( view );
 887         return TRUE;
 888     }
 889
 890     /* Decommit the pages by remapping zero-pages instead */
 891
 892     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
 893         ERR( "Could not remap pages, expect trouble\n" );
 894     return VIRTUAL_SetProt( view, base, size, 0 );
 895 }
 896
 897
 898 /***********************************************************************
 899  *             VirtualLock   (KERNEL32.551)
 900  * Locks the specified region of virtual address space
 901  *
 902  * NOTE
 903  *      Always returns TRUE
 904  *
 905  * RETURNS
 906  *      TRUE: Success
 907  *      FALSE: Failure
 908  */
 909 BOOL WINAPI VirtualLock(
 910               LPVOID addr, /* [in] Address of first byte of range to lock */
 911               DWORD size   /* [in] Number of bytes in range to lock */
 912 ) {
 913     return TRUE;
 914 }
 915
 916
 917 /***********************************************************************
 918  *             VirtualUnlock   (KERNEL32.556)
 919  * Unlocks a range of pages in the virtual address space
 920  *
 921  * NOTE
 922  *      Always returns TRUE
 923  *
 924  * RETURNS
 925  *      TRUE: Success
 926  *      FALSE: Failure
 927  */
 928 BOOL WINAPI VirtualUnlock(
 929               LPVOID addr, /* [in] Address of first byte of range */
 930               DWORD size   /* [in] Number of bytes in range */
 931 ) {
 932     return TRUE;
 933 }
 934
 935
 936 /***********************************************************************
 937  *             VirtualProtect   (KERNEL32.552)
 938  * Changes the access protection on a region of committed pages
 939  *
 940  * RETURNS
 941  *      TRUE: Success
 942  *      FALSE: Failure
 943  */
 944 BOOL WINAPI VirtualProtect(
 945               LPVOID addr,     /* [in] Address of region of committed pages */
 946               DWORD size,      /* [in] Size of region */
 947               DWORD new_prot,  /* [in] Desired access protection */
 948               LPDWORD old_prot /* [out] Address of variable to get old protection */
 949 ) {
 950     FILE_VIEW *view;
 951     UINT base, i;
 952     BYTE vprot, *p;
 953
 954     TRACE("%08x %08lx %08lx\n",
 955                      (UINT)addr, size, new_prot );
 956
 957     /* Fix the parameters */
 958
 959     size = ROUND_SIZE( addr, size );
 960     base = ROUND_ADDR( addr );
 961
 962     if (!(view = VIRTUAL_FindView( base )) ||
 963         (base + size > view->base + view->size))
 964     {
 965         SetLastError( ERROR_INVALID_PARAMETER );
 966         return FALSE;
 967     }
 968
 969     /* Make sure all the pages are committed */
 970
 971     p = view->prot + ((base - view->base) >> page_shift);
 972     for (i = size >> page_shift; i; i--, p++)
 973     {
 974         if (!(*p & VPROT_COMMITTED))
 975         {
 976             SetLastError( ERROR_INVALID_PARAMETER );
 977             return FALSE;
 978         }
 979     }
 980
 981     if (old_prot) VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 982     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 983     return VIRTUAL_SetProt( view, base, size, vprot );
 984 }
 985
 986
 987 /***********************************************************************
 988  *             VirtualProtectEx   (KERNEL32.553)
 989  * Changes the access protection on a region of committed pages in the
 990  * virtual address space of a specified process
 991  *
 992  * RETURNS
 993  *      TRUE: Success
 994  *      FALSE: Failure
 995  */
 996 BOOL WINAPI VirtualProtectEx(
 997               HANDLE handle, /* [in]  Handle of process */
 998               LPVOID addr,     /* [in]  Address of region of committed pages */
 999               DWORD size,      /* [in]  Size of region */
1000               DWORD new_prot,  /* [in]  Desired access protection */
1001               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1002 {
1003     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1004         return VirtualProtect( addr, size, new_prot, old_prot );
1005     ERR("Unsupported on other process\n");
1006     return FALSE;
1007 }
1008
1009
1010 /***********************************************************************
1011  *             VirtualQuery   (KERNEL32.554)
1012  * Provides info about a range of pages in virtual address space
1013  *
1014  * RETURNS
1015  *      Number of bytes returned in information buffer
1016  *      or 0 if addr is >= 0xc0000000 (kernel space).
1017  */
1018 DWORD WINAPI VirtualQuery(
1019              LPCVOID addr,                    /* [in]  Address of region */
1020              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1021              DWORD len                        /* [in]  Size of buffer */
1022 ) {
1023     FILE_VIEW *view;
1024     UINT base;
1025     UINT alloc_base = 0;
1026     UINT size = 0;
1027
1028     if (addr >= (void*)0xc0000000) return 0;
1029
1030     base = ROUND_ADDR( addr );
1031
1032     /* Find the view containing the address */
1033
1034     EnterCriticalSection(&csVirtual);
1035     view = VIRTUAL_FirstView;
1036     for (;;)
1037     {
1038         if (!view)
1039         {
1040             size = 0xffff0000 - alloc_base;
1041             break;
1042         }
1043         if (view->base > base)
1044         {
1045             size = view->base - alloc_base;
1046             view = NULL;
1047             break;
1048         }
1049         if (view->base + view->size > base)
1050         {
1051             alloc_base = view->base;
1052             size = view->size;
1053             break;
1054         }
1055         alloc_base = view->base + view->size;
1056         view = view->next;
1057     }
1058     LeaveCriticalSection(&csVirtual);
1059
1060     /* Fill the info structure */
1061
1062     if (!view)
1063     {
1064         info->State             = MEM_FREE;
1065         info->Protect           = 0;
1066         info->AllocationProtect = 0;
1067         info->Type              = 0;
1068     }
1069     else
1070     {
1071         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1072         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1073         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1074             if (view->prot[size >> page_shift] != vprot) break;
1075         info->AllocationProtect = view->protect;
1076         info->Type              = MEM_PRIVATE;  /* FIXME */
1077     }
1078
1079     info->BaseAddress    = (LPVOID)base;
1080     info->AllocationBase = (LPVOID)alloc_base;
1081     info->RegionSize     = size - (base - alloc_base);
1082     return sizeof(*info);
1083 }
1084
1085
1086 /***********************************************************************
1087  *             VirtualQueryEx   (KERNEL32.555)
1088  * Provides info about a range of pages in virtual address space of a
1089  * specified process
1090  *
1091  * RETURNS
1092  *      Number of bytes returned in information buffer
1093  */
1094 DWORD WINAPI VirtualQueryEx(
1095              HANDLE handle,                 /* [in] Handle of process */
1096              LPCVOID addr,                    /* [in] Address of region */
1097              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1098              DWORD len                        /* [in] Size of buffer */ )
1099 {
1100     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1101         return VirtualQuery( addr, info, len );
1102     ERR("Unsupported on other process\n");
1103     return 0;
1104 }
1105
1106
1107 /***********************************************************************
1108  *             IsBadReadPtr   (KERNEL32.354)
1109  *
1110  * RETURNS
1111  *      FALSE: Process has read access to entire block
1112  *      TRUE: Otherwise
1113  */
1114 BOOL WINAPI IsBadReadPtr(
1115               LPCVOID ptr, /* [in] Address of memory block */
1116               UINT size )  /* [in] Size of block */
1117 {
1118     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1119     __TRY
1120     {
1121         volatile const char *p = ptr;
1122         char dummy;
1123         UINT count = size;
1124
1125         while (count > page_size)
1126         {
1127             dummy = *p;
1128             p += page_size;
1129             count -= page_size;
1130         }
1131         dummy = p[0];
1132         dummy = p[count - 1];
1133     }
1134     __EXCEPT(page_fault) { return TRUE; }
1135     __ENDTRY
1136     return FALSE;
1137 }
1138
1139
1140 /***********************************************************************
1141  *             IsBadWritePtr   (KERNEL32.357)
1142  *
1143  * RETURNS
1144  *      FALSE: Process has write access to entire block
1145  *      TRUE: Otherwise
1146  */
1147 BOOL WINAPI IsBadWritePtr(
1148               LPVOID ptr, /* [in] Address of memory block */
1149               UINT size ) /* [in] Size of block in bytes */
1150 {
1151     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1152     __TRY
1153     {
1154         volatile char *p = ptr;
1155         UINT count = size;
1156
1157         while (count > page_size)
1158         {
1159             *p |= 0;
1160             p += page_size;
1161             count -= page_size;
1162         }
1163         p[0] |= 0;
1164         p[count - 1] |= 0;
1165     }
1166     __EXCEPT(page_fault) { return TRUE; }
1167     __ENDTRY
1168     return FALSE;
1169 }
1170
1171
1172 /***********************************************************************
1173  *             IsBadHugeReadPtr   (KERNEL32.352)
1174  * RETURNS
1175  *      FALSE: Process has read access to entire block
1176  *      TRUE: Otherwise
1177  */
1178 BOOL WINAPI IsBadHugeReadPtr(
1179               LPCVOID ptr, /* [in] Address of memory block */
1180               UINT size  /* [in] Size of block */
1181 ) {
1182     return IsBadReadPtr( ptr, size );
1183 }
1184
1185
1186 /***********************************************************************
1187  *             IsBadHugeWritePtr   (KERNEL32.353)
1188  * RETURNS
1189  *      FALSE: Process has write access to entire block
1190  *      TRUE: Otherwise
1191  */
1192 BOOL WINAPI IsBadHugeWritePtr(
1193               LPVOID ptr, /* [in] Address of memory block */
1194               UINT size /* [in] Size of block */
1195 ) {
1196     return IsBadWritePtr( ptr, size );
1197 }
1198
1199
1200 /***********************************************************************
1201  *             IsBadCodePtr   (KERNEL32.351)
1202  *
1203  * RETURNS
1204  *      FALSE: Process has read access to specified memory
1205  *      TRUE: Otherwise
1206  */
1207 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1208 {
1209     return IsBadReadPtr( ptr, 1 );
1210 }
1211
1212
1213 /***********************************************************************
1214  *             IsBadStringPtrA   (KERNEL32.355)
1215  *
1216  * RETURNS
1217  *      FALSE: Read access to all bytes in string
1218  *      TRUE: Else
1219  */
1220 BOOL WINAPI IsBadStringPtrA(
1221               LPCSTR str, /* [in] Address of string */
1222               UINT max )  /* [in] Maximum size of string */
1223 {
1224     __TRY
1225     {
1226         volatile const char *p = str;
1227         while (p != str + max) if (!*p++) break;
1228     }
1229     __EXCEPT(page_fault) { return TRUE; }
1230     __ENDTRY
1231     return FALSE;
1232 }
1233
1234
1235 /***********************************************************************
1236  *             IsBadStringPtrW   (KERNEL32.356)
1237  * See IsBadStringPtrA
1238  */
1239 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1240 {
1241     __TRY
1242     {
1243         volatile const WCHAR *p = str;
1244         while (p != str + max) if (!*p++) break;
1245     }
1246     __EXCEPT(page_fault) { return TRUE; }
1247     __ENDTRY
1248     return FALSE;
1249 }
1250
1251
1252 /***********************************************************************
1253  *             CreateFileMappingA   (KERNEL32.46)
1254  * Creates a named or unnamed file-mapping object for the specified file
1255  *
1256  * RETURNS
1257  *      Handle: Success
1258  *      0: Mapping object does not exist
1259  *      NULL: Failure
1260  */
1261 HANDLE WINAPI CreateFileMappingA(
1262                 HANDLE hFile,   /* [in] Handle of file to map */
1263                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1264                 DWORD protect,   /* [in] Protection for mapping object */
1265                 DWORD size_high, /* [in] High-order 32 bits of object size */
1266                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1267                 LPCSTR name      /* [in] Name of file-mapping object */ )
1268 {
1269     HANDLE ret;
1270     BYTE vprot;
1271     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1272
1273     /* Check parameters */
1274
1275     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1276           hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1277
1278     if (len > MAX_PATH)
1279     {
1280         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1281         return 0;
1282     }
1283     vprot = VIRTUAL_GetProt( protect );
1284     if (protect & SEC_RESERVE)
1285     {
1286         if (hFile != INVALID_HANDLE_VALUE)
1287         {
1288             SetLastError( ERROR_INVALID_PARAMETER );
1289             return 0;
1290         }
1291     }
1292     else vprot |= VPROT_COMMITTED;
1293     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1294     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1295
1296     /* Create the server object */
1297
1298     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1299     SERVER_START_REQ
1300     {
1301         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1302                                                                len * sizeof(WCHAR) );
1303         req->file_handle = hFile;
1304         req->size_high   = size_high;
1305         req->size_low    = size_low;
1306         req->protect     = vprot;
1307         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1308         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1309         SetLastError(0);
1310         server_call( REQ_CREATE_MAPPING );
1311         ret = req->handle;
1312     }
1313     SERVER_END_REQ;
1314     return ret;
1315 }
1316
1317
1318 /***********************************************************************
1319  *             CreateFileMappingW   (KERNEL32.47)
1320  * See CreateFileMappingA
1321  */
1322 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1323                                   DWORD protect, DWORD size_high,
1324                                   DWORD size_low, LPCWSTR name )
1325 {
1326     HANDLE ret;
1327     BYTE vprot;
1328     DWORD len = name ? strlenW(name) : 0;
1329
1330     /* Check parameters */
1331
1332     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1333           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1334
1335     if (len > MAX_PATH)
1336     {
1337         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1338         return 0;
1339     }
1340
1341     vprot = VIRTUAL_GetProt( protect );
1342     if (protect & SEC_RESERVE)
1343     {
1344         if (hFile != INVALID_HANDLE_VALUE)
1345         {
1346             SetLastError( ERROR_INVALID_PARAMETER );
1347             return 0;
1348         }
1349     }
1350     else vprot |= VPROT_COMMITTED;
1351     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1352     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1353
1354     /* Create the server object */
1355
1356     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1357     SERVER_START_REQ
1358     {
1359         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1360                                                                len * sizeof(WCHAR) );
1361         req->file_handle = hFile;
1362         req->size_high   = size_high;
1363         req->size_low    = size_low;
1364         req->protect     = vprot;
1365         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1366         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1367         SetLastError(0);
1368         server_call( REQ_CREATE_MAPPING );
1369         ret = req->handle;
1370     }
1371     SERVER_END_REQ;
1372     return ret;
1373 }
1374
1375
1376 /***********************************************************************
1377  *             OpenFileMappingA   (KERNEL32.397)
1378  * Opens a named file-mapping object.
1379  *
1380  * RETURNS
1381  *      Handle: Success
1382  *      NULL: Failure
1383  */
1384 HANDLE WINAPI OpenFileMappingA(
1385                 DWORD access,   /* [in] Access mode */
1386                 BOOL inherit, /* [in] Inherit flag */
1387                 LPCSTR name )   /* [in] Name of file-mapping object */
1388 {
1389     HANDLE ret;
1390     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1391     if (len > MAX_PATH)
1392     {
1393         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1394         return 0;
1395     }
1396     SERVER_START_REQ
1397     {
1398         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1399
1400         req->access  = access;
1401         req->inherit = inherit;
1402         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1403         server_call( REQ_OPEN_MAPPING );
1404         ret = req->handle;
1405     }
1406     SERVER_END_REQ;
1407     return ret;
1408 }
1409
1410
1411 /***********************************************************************
1412  *             OpenFileMappingW   (KERNEL32.398)
1413  * See OpenFileMappingA
1414  */
1415 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1416 {
1417     HANDLE ret;
1418     DWORD len = name ? strlenW(name) : 0;
1419     if (len > MAX_PATH)
1420     {
1421         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1422         return 0;
1423     }
1424     SERVER_START_REQ
1425     {
1426         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1427
1428         req->access  = access;
1429         req->inherit = inherit;
1430         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1431         server_call( REQ_OPEN_MAPPING );
1432         ret = req->handle;
1433     }
1434     SERVER_END_REQ;
1435     return ret;
1436 }
1437
1438
1439 /***********************************************************************
1440  *             MapViewOfFile   (KERNEL32.385)
1441  * Maps a view of a file into the address space
1442  *
1443  * RETURNS
1444  *      Starting address of mapped view
1445  *      NULL: Failure
1446  */
1447 LPVOID WINAPI MapViewOfFile(
1448               HANDLE mapping,  /* [in] File-mapping object to map */
1449               DWORD access,      /* [in] Access mode */
1450               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1451               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1452               DWORD count        /* [in] Number of bytes to map */
1453 ) {
1454     return MapViewOfFileEx( mapping, access, offset_high,
1455                             offset_low, count, NULL );
1456 }
1457
1458
1459 /***********************************************************************
1460  *             MapViewOfFileEx   (KERNEL32.386)
1461  * Maps a view of a file into the address space
1462  *
1463  * RETURNS
1464  *      Starting address of mapped view
1465  *      NULL: Failure
1466  */
1467 LPVOID WINAPI MapViewOfFileEx(
1468               HANDLE handle,   /* [in] File-mapping object to map */
1469               DWORD access,      /* [in] Access mode */
1470               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1471               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1472               DWORD count,       /* [in] Number of bytes to map */
1473               LPVOID addr        /* [in] Suggested starting address for mapped view */
1474 ) {
1475     FILE_VIEW *view;
1476     UINT ptr = (UINT)-1, size = 0;
1477     int flags = MAP_PRIVATE;
1478     int unix_handle = -1;
1479     int prot, anonymous, res;
1480     void *base;
1481     DWORD size_low, size_high, header_size, shared_size;
1482     HANDLE shared_file;
1483
1484     /* Check parameters */
1485
1486     if ((offset_low & granularity_mask) ||
1487         (addr && ((UINT)addr & granularity_mask)))
1488     {
1489         SetLastError( ERROR_INVALID_PARAMETER );
1490         return NULL;
1491     }
1492
1493     SERVER_START_REQ
1494     {
1495         struct get_mapping_info_request *req = server_alloc_req( sizeof(*req), 0 );
1496         req->handle = handle;
1497         res = server_call( REQ_GET_MAPPING_INFO );
1498         prot        = req->protect;
1499         base        = req->base;
1500         size_low    = req->size_low;
1501         size_high   = req->size_high;
1502         header_size = req->header_size;
1503         shared_file = req->shared_file;
1504         shared_size = req->shared_size;
1505         anonymous   = req->anonymous;
1506     }
1507     SERVER_END_REQ;
1508     if (res) goto error;
1509
1510     if (!anonymous)
1511     {
1512         if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1513     }
1514
1515     if (prot & VPROT_IMAGE)
1516         return map_image( handle, unix_handle, base, size_low, header_size,
1517                           shared_file, shared_size );
1518
1519
1520     if (size_high || offset_high)
1521         ERR("Offsets larger than 4Gb not supported\n");
1522
1523     if ((offset_low >= size_low) ||
1524         (count > size_low - offset_low))
1525     {
1526         SetLastError( ERROR_INVALID_PARAMETER );
1527         goto error;
1528     }
1529     if (count) size = ROUND_SIZE( offset_low, count );
1530     else size = size_low - offset_low;
1531
1532     switch(access)
1533     {
1534     case FILE_MAP_ALL_ACCESS:
1535     case FILE_MAP_WRITE:
1536     case FILE_MAP_WRITE | FILE_MAP_READ:
1537         if (!(prot & VPROT_WRITE))
1538         {
1539             SetLastError( ERROR_INVALID_PARAMETER );
1540             goto error;
1541         }
1542         flags = MAP_SHARED;
1543         /* fall through */
1544     case FILE_MAP_READ:
1545     case FILE_MAP_COPY:
1546     case FILE_MAP_COPY | FILE_MAP_READ:
1547         if (prot & VPROT_READ) break;
1548         /* fall through */
1549     default:
1550         SetLastError( ERROR_INVALID_PARAMETER );
1551         goto error;
1552     }
1553
1554     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1555      * which has a view of this mapping commits some pages, they will
1556      * appear commited in all other processes, which have the same
1557      * view created. Since we don`t support this yet, we create the
1558      * whole mapping commited.
1559      */
1560     prot |= VPROT_COMMITTED;
1561
1562     /* Map the file */
1563
1564     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1565
1566     ptr = (UINT)VIRTUAL_mmap( unix_handle, addr, size, offset_low,
1567                               VIRTUAL_GetUnixProt( prot ), flags );
1568     if (ptr == (UINT)-1) {
1569         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1570          * Platform Differences":
1571          * Windows NT: ERROR_INVALID_PARAMETER
1572          * Windows 95: ERROR_INVALID_ADDRESS.
1573          * FIXME: So should we add a module dependend check here? -MM
1574          */
1575         if (errno==ENOMEM)
1576             SetLastError( ERROR_OUTOFMEMORY );
1577         else
1578             SetLastError( ERROR_INVALID_PARAMETER );
1579         goto error;
1580     }
1581
1582     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1583     {
1584         SetLastError( ERROR_OUTOFMEMORY );
1585         goto error;
1586     }
1587     if (unix_handle != -1) close( unix_handle );
1588     return (LPVOID)ptr;
1589
1590 error:
1591     if (unix_handle != -1) close( unix_handle );
1592     if (ptr != (UINT)-1) munmap( (void *)ptr, size );
1593     return NULL;
1594 }
1595
1596
1597 /***********************************************************************
1598  *             FlushViewOfFile   (KERNEL32.262)
1599  * Writes to the disk a byte range within a mapped view of a file
1600  *
1601  * RETURNS
1602  *      TRUE: Success
1603  *      FALSE: Failure
1604  */
1605 BOOL WINAPI FlushViewOfFile(
1606               LPCVOID base, /* [in] Start address of byte range to flush */
1607               DWORD cbFlush /* [in] Number of bytes in range */
1608 ) {
1609     FILE_VIEW *view;
1610     UINT addr = ROUND_ADDR( base );
1611
1612     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1613                      base, cbFlush );
1614
1615     if (!(view = VIRTUAL_FindView( addr )))
1616     {
1617         SetLastError( ERROR_INVALID_PARAMETER );
1618         return FALSE;
1619     }
1620     if (!cbFlush) cbFlush = view->size;
1621     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1622     SetLastError( ERROR_INVALID_PARAMETER );
1623     return FALSE;
1624 }
1625
1626
1627 /***********************************************************************
1628  *             UnmapViewOfFile   (KERNEL32.540)
1629  * Unmaps a mapped view of a file.
1630  *
1631  * NOTES
1632  *      Should addr be an LPCVOID?
1633  *
1634  * RETURNS
1635  *      TRUE: Success
1636  *      FALSE: Failure
1637  */
1638 BOOL WINAPI UnmapViewOfFile(
1639               LPVOID addr /* [in] Address where mapped view begins */
1640 ) {
1641     FILE_VIEW *view;
1642     UINT base = ROUND_ADDR( addr );
1643     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1644     {
1645         SetLastError( ERROR_INVALID_PARAMETER );
1646         return FALSE;
1647     }
1648     VIRTUAL_DeleteView( view );
1649     return TRUE;
1650 }