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 #define VFLAG_VALLOC     0x02  /* allocated by VirtualAlloc */
  60
  61 /* Conversion from VPROT_* to Win32 flags */
  62 static const BYTE VIRTUAL_Win32Flags[16] =
  63 {
  64     PAGE_NOACCESS,              /* 0 */
  65     PAGE_READONLY,              /* READ */
  66     PAGE_READWRITE,             /* WRITE */
  67     PAGE_READWRITE,             /* READ | WRITE */
  68     PAGE_EXECUTE,               /* EXEC */
  69     PAGE_EXECUTE_READ,          /* READ | EXEC */
  70     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  71     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  72     PAGE_WRITECOPY,             /* WRITECOPY */
  73     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  74     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  75     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  77     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  78     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  79     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  80 };
  81
  82
  83 static FILE_VIEW *VIRTUAL_FirstView;
  84 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT;
  85
  86 #ifdef __i386__
  87 /* These are always the same on an i386, and it will be faster this way */
  88 # define page_mask  0xfff
  89 # define page_shift 12
  90 # define page_size  0x1000
  91 #else
  92 static UINT page_shift;
  93 static UINT page_mask;
  94 static UINT page_size;
  95 #endif  /* __i386__ */
  96 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
  97
  98 #define ROUND_ADDR(addr) \
  99    ((UINT)(addr) & ~page_mask)
 100
 101 #define ROUND_SIZE(addr,size) \
 102    (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
 103
 104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 105    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 106
 107 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset, int prot, int flags );
 108
 109 /* filter for page-fault exceptions */
 110 static WINE_EXCEPTION_FILTER(page_fault)
 111 {
 112     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 113         return EXCEPTION_EXECUTE_HANDLER;
 114     return EXCEPTION_CONTINUE_SEARCH;
 115 }
 116
 117 /***********************************************************************
 118  *           VIRTUAL_GetProtStr
 119  */
 120 static const char *VIRTUAL_GetProtStr( BYTE prot )
 121 {
 122     static char buffer[6];
 123     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 124     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 125     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 126     buffer[3] = (prot & VPROT_WRITE) ?
 127                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 128     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 129     buffer[5] = 0;
 130     return buffer;
 131 }
 132
 133
 134 /***********************************************************************
 135  *           VIRTUAL_DumpView
 136  */
 137 static void VIRTUAL_DumpView( FILE_VIEW *view )
 138 {
 139     UINT i, count;
 140     UINT addr = view->base;
 141     BYTE prot = view->prot[0];
 142
 143     DPRINTF( "View: %08x - %08x",
 144              view->base, view->base + view->size - 1 );
 145     if (view->flags & VFLAG_SYSTEM)
 146         DPRINTF( " (system)\n" );
 147     else if (view->flags & VFLAG_VALLOC)
 148         DPRINTF( " (valloc)\n" );
 149     else if (view->mapping)
 150         DPRINTF( " %d\n", view->mapping );
 151     else
 152         DPRINTF( " (anonymous)\n");
 153
 154     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 155     {
 156         if (view->prot[i] == prot) continue;
 157         DPRINTF( "      %08x - %08x %s\n",
 158               addr, addr + (count << page_shift) - 1,
 159               VIRTUAL_GetProtStr(prot) );
 160         addr += (count << page_shift);
 161         prot = view->prot[i];
 162         count = 0;
 163     }
 164     if (count)
 165         DPRINTF( "      %08x - %08x %s\n",
 166               addr, addr + (count << page_shift) - 1,
 167               VIRTUAL_GetProtStr(prot) );
 168 }
 169
 170
 171 /***********************************************************************
 172  *           VIRTUAL_Dump
 173  */
 174 void VIRTUAL_Dump(void)
 175 {
 176     FILE_VIEW *view;
 177     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 178     EnterCriticalSection(&csVirtual);
 179     view = VIRTUAL_FirstView;
 180     while (view)
 181     {
 182         VIRTUAL_DumpView( view );
 183         view = view->next;
 184     }
 185     LeaveCriticalSection(&csVirtual);
 186 }
 187
 188
 189 /***********************************************************************
 190  *           VIRTUAL_FindView
 191  *
 192  * Find the view containing a given address.
 193  *
 194  * RETURNS
 195  *      View: Success
 196  *      NULL: Failure
 197  */
 198 static FILE_VIEW *VIRTUAL_FindView(
 199                   UINT addr /* [in] Address */
 200 ) {
 201     FILE_VIEW *view;
 202
 203     EnterCriticalSection(&csVirtual);
 204     view = VIRTUAL_FirstView;
 205     while (view)
 206     {
 207         if (view->base > addr)
 208         {
 209             view = NULL;
 210             break;
 211         }
 212         if (view->base + view->size > addr) break;
 213         view = view->next;
 214     }
 215     LeaveCriticalSection(&csVirtual);
 216     return view;
 217 }
 218
 219
 220 /***********************************************************************
 221  *           VIRTUAL_CreateView
 222  *
 223  * Create a new view and add it in the linked list.
 224  */
 225 static FILE_VIEW *VIRTUAL_CreateView( UINT base, UINT size, UINT flags,
 226                                       BYTE vprot, HANDLE mapping )
 227 {
 228     FILE_VIEW *view, *prev;
 229
 230     /* Create the view structure */
 231
 232     assert( !(base & page_mask) );
 233     assert( !(size & page_mask) );
 234     size >>= page_shift;
 235     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 236     view->base    = base;
 237     view->size    = size << page_shift;
 238     view->flags   = flags;
 239     view->mapping = mapping;
 240     view->protect = vprot;
 241     view->handlerProc = NULL;
 242     memset( view->prot, vprot, size );
 243
 244     /* Duplicate the mapping handle */
 245
 246     if (view->mapping &&
 247         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 248                           GetCurrentProcess(), &view->mapping,
 249                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 250     {
 251         free( view );
 252         return NULL;
 253     }
 254
 255     /* Insert it in the linked list */
 256
 257     EnterCriticalSection(&csVirtual);
 258     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 259     {
 260         view->next = VIRTUAL_FirstView;
 261         view->prev = NULL;
 262         if (view->next) view->next->prev = view;
 263         VIRTUAL_FirstView = view;
 264     }
 265     else
 266     {
 267         prev = VIRTUAL_FirstView;
 268         while (prev->next && (prev->next->base < base)) prev = prev->next;
 269         view->next = prev->next;
 270         view->prev = prev;
 271         if (view->next) view->next->prev = view;
 272         prev->next  = view;
 273     }
 274     LeaveCriticalSection(&csVirtual);
 275     VIRTUAL_DEBUG_DUMP_VIEW( view );
 276     return view;
 277 }
 278
 279
 280 /***********************************************************************
 281  *           VIRTUAL_DeleteView
 282  * Deletes a view.
 283  *
 284  * RETURNS
 285  *      None
 286  */
 287 static void VIRTUAL_DeleteView(
 288             FILE_VIEW *view /* [in] View */
 289 ) {
 290     if (!(view->flags & VFLAG_SYSTEM))
 291         munmap( (void *)view->base, view->size );
 292     EnterCriticalSection(&csVirtual);
 293     if (view->next) view->next->prev = view->prev;
 294     if (view->prev) view->prev->next = view->next;
 295     else VIRTUAL_FirstView = view->next;
 296     LeaveCriticalSection(&csVirtual);
 297     if (view->mapping) NtClose( view->mapping );
 298     free( view );
 299 }
 300
 301
 302 /***********************************************************************
 303  *           VIRTUAL_GetUnixProt
 304  *
 305  * Convert page protections to protection for mmap/mprotect.
 306  */
 307 static int VIRTUAL_GetUnixProt( BYTE vprot )
 308 {
 309     int prot = 0;
 310     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 311     {
 312         if (vprot & VPROT_READ) prot |= PROT_READ;
 313         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 314         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 315         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 316     }
 317     return prot;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           VIRTUAL_GetWin32Prot
 323  *
 324  * Convert page protections to Win32 flags.
 325  *
 326  * RETURNS
 327  *      None
 328  */
 329 static void VIRTUAL_GetWin32Prot(
 330             BYTE vprot,     /* [in] Page protection flags */
 331             DWORD *protect, /* [out] Location to store Win32 protection flags */
 332             DWORD *state    /* [out] Location to store mem state flag */
 333 ) {
 334     if (protect) {
 335         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 336 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 337         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 338
 339         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 340     }
 341
 342     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 343 }
 344
 345
 346 /***********************************************************************
 347  *           VIRTUAL_GetProt
 348  *
 349  * Build page protections from Win32 flags.
 350  *
 351  * RETURNS
 352  *      Value of page protection flags
 353  */
 354 static BYTE VIRTUAL_GetProt(
 355             DWORD protect  /* [in] Win32 protection flags */
 356 ) {
 357     BYTE vprot;
 358
 359     switch(protect & 0xff)
 360     {
 361     case PAGE_READONLY:
 362         vprot = VPROT_READ;
 363         break;
 364     case PAGE_READWRITE:
 365         vprot = VPROT_READ | VPROT_WRITE;
 366         break;
 367     case PAGE_WRITECOPY:
 368         /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
 369          * that the hFile must have been opened with GENERIC_READ and
 370          * GENERIC_WRITE access.  This is WRONG as tests show that you
 371          * only need GENERIC_READ access (at least for Win9x,
 372          * FIXME: what about NT?).  Thus, we don't put VPROT_WRITE in
 373          * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
 374          */
 375         vprot = VPROT_READ | VPROT_WRITECOPY;
 376         break;
 377     case PAGE_EXECUTE:
 378         vprot = VPROT_EXEC;
 379         break;
 380     case PAGE_EXECUTE_READ:
 381         vprot = VPROT_EXEC | VPROT_READ;
 382         break;
 383     case PAGE_EXECUTE_READWRITE:
 384         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 385         break;
 386     case PAGE_EXECUTE_WRITECOPY:
 387         /* See comment for PAGE_WRITECOPY above */
 388         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
 389         break;
 390     case PAGE_NOACCESS:
 391     default:
 392         vprot = 0;
 393         break;
 394     }
 395     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 396     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 397     return vprot;
 398 }
 399
 400
 401 /***********************************************************************
 402  *           VIRTUAL_SetProt
 403  *
 404  * Change the protection of a range of pages.
 405  *
 406  * RETURNS
 407  *      TRUE: Success
 408  *      FALSE: Failure
 409  */
 410 static BOOL VIRTUAL_SetProt(
 411               FILE_VIEW *view, /* [in] Pointer to view */
 412               UINT base,     /* [in] Starting address */
 413               UINT size,     /* [in] Size in bytes */
 414               BYTE vprot       /* [in] Protections to use */
 415 ) {
 416     TRACE("%08x-%08x %s\n",
 417                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 418
 419     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 420         return FALSE;  /* FIXME: last error */
 421
 422     memset( view->prot + ((base - view->base) >> page_shift),
 423             vprot, size >> page_shift );
 424     VIRTUAL_DEBUG_DUMP_VIEW( view );
 425     return TRUE;
 426 }
 427
 428
 429 /***********************************************************************
 430  *           map_image
 431  *
 432  * Map an executable (PE format) image into memory.
 433  */
 434 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 435                          DWORD header_size, HANDLE shared_file, DWORD shared_size )
 436 {
 437     IMAGE_DOS_HEADER *dos;
 438     IMAGE_NT_HEADERS *nt;
 439     IMAGE_SECTION_HEADER *sec;
 440     int i, pos;
 441     DWORD err = GetLastError();
 442     FILE_VIEW *view = NULL;
 443     char *ptr;
 444     int shared_fd = -1;
 445
 446     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 447
 448     /* zero-map the whole range */
 449
 450     if ((ptr = wine_anon_mmap( base, total_size,
 451                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 452     {
 453         ptr = wine_anon_mmap( NULL, total_size,
 454                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 455         if (ptr == (char *)-1)
 456         {
 457             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 458             goto error;
 459         }
 460     }
 461     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 462
 463     if (!(view = VIRTUAL_CreateView( (UINT)ptr, total_size, 0,
 464                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 465                                      hmapping )))
 466     {
 467         munmap( ptr, total_size );
 468         SetLastError( ERROR_OUTOFMEMORY );
 469         goto error;
 470     }
 471
 472     /* map the header */
 473
 474     if (VIRTUAL_mmap( fd, ptr, header_size, 0, PROT_READ | PROT_WRITE,
 475                       MAP_PRIVATE | MAP_FIXED ) == (char *)-1) goto error;
 476     dos = (IMAGE_DOS_HEADER *)ptr;
 477     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 478     if ((char *)(nt + 1) > ptr + header_size) goto error;
 479
 480     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 481     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 482
 483     /* check the architecture */
 484
 485     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 486     {
 487         MESSAGE("Trying to load PE image for unsupported architecture (");
 488         switch (nt->FileHeader.Machine)
 489         {
 490         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 491         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 492         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 493         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 494         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 495         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 496         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 497         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 498         }
 499         MESSAGE(")\n");
 500         goto error;
 501     }
 502
 503     /* retrieve the shared sections file */
 504
 505     if (shared_size)
 506     {
 507         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 508         CloseHandle( shared_file );  /* we no longer need it */
 509         shared_file = 0;
 510     }
 511
 512     /* map all the sections */
 513
 514     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 515     {
 516         DWORD size;
 517
 518         /* a few sanity checks */
 519         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 520         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 521         {
 522             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 523                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 524             goto error;
 525         }
 526
 527         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 528             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 529         {
 530             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 531             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 532                           sec->Name, (char *)ptr + sec->VirtualAddress,
 533                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 534                           size, sec->Characteristics );
 535             if (VIRTUAL_mmap( shared_fd, (char *)ptr + sec->VirtualAddress, size,
 536                               pos, PROT_READ|PROT_WRITE|PROT_EXEC,
 537                               MAP_SHARED|MAP_FIXED ) == (void *)-1)
 538             {
 539                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 540                 goto error;
 541             }
 542             pos += size;
 543             continue;
 544         }
 545
 546         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 547         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 548
 549         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 550                         sec->Name, (char *)ptr + sec->VirtualAddress,
 551                         sec->PointerToRawData, sec->SizeOfRawData,
 552                         sec->Characteristics );
 553
 554         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 555          *       fall back to read(), so we don't need to check anything here.
 556          */
 557         if (VIRTUAL_mmap( fd, (char *)ptr + sec->VirtualAddress, sec->SizeOfRawData,
 558                           sec->PointerToRawData, PROT_READ|PROT_WRITE|PROT_EXEC,
 559                           MAP_PRIVATE | MAP_FIXED ) == (void *)-1)
 560         {
 561             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 562             goto error;
 563         }
 564
 565         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 566         {
 567             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 568             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 569             TRACE_(module)("clearing %p - %p\n",
 570                            (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData,
 571                            (char *)ptr + sec->VirtualAddress + end );
 572             memset( (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 573                     end - sec->SizeOfRawData );
 574         }
 575     }
 576
 577     SetLastError( err );  /* restore last error */
 578     close( fd );
 579     if (shared_fd != -1) close( shared_fd );
 580     return ptr;
 581
 582  error:
 583     if (view) VIRTUAL_DeleteView( view );
 584     close( fd );
 585     if (shared_fd != -1) close( shared_fd );
 586     if (shared_file) CloseHandle( shared_file );
 587     return NULL;
 588 }
 589
 590
 591 /***********************************************************************
 592  *           VIRTUAL_Init
 593  */
 594 #ifndef page_mask
 595 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 596 {
 597     page_size = getpagesize();
 598     page_mask = page_size - 1;
 599     /* Make sure we have a power of 2 */
 600     assert( !(page_size & page_mask) );
 601     page_shift = 0;
 602     while ((1 << page_shift) != page_size) page_shift++;
 603 }
 604 #endif  /* page_mask */
 605
 606
 607 /***********************************************************************
 608  *           VIRTUAL_SetFaultHandler
 609  */
 610 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 611 {
 612     FILE_VIEW *view;
 613
 614     if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
 615     view->handlerProc = proc;
 616     view->handlerArg  = arg;
 617     return TRUE;
 618 }
 619
 620 /***********************************************************************
 621  *           VIRTUAL_HandleFault
 622  */
 623 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 624 {
 625     FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
 626     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 627
 628     if (view)
 629     {
 630         if (view->handlerProc)
 631         {
 632             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 633         }
 634         else
 635         {
 636             BYTE vprot = view->prot[((UINT)addr - view->base) >> page_shift];
 637             UINT page = (UINT)addr & ~page_mask;
 638             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 639             if (vprot & VPROT_GUARD)
 640             {
 641                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 642                 ret = STATUS_GUARD_PAGE_VIOLATION;
 643             }
 644             /* is it inside the stack guard pages? */
 645             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 646                 ret = STATUS_STACK_OVERFLOW;
 647         }
 648     }
 649     return ret;
 650 }
 651
 652
 653 /***********************************************************************
 654  *           VIRTUAL_mmap
 655  *
 656  * Wrapper for mmap() that handles anonymous mappings portably,
 657  * and falls back to read if mmap of a file fails.
 658  */
 659 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 660                             DWORD offset, int prot, int flags )
 661 {
 662     int pos;
 663     LPVOID ret;
 664
 665     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 666
 667     if ((ret = mmap( start, size, prot, flags, fd, offset )) != (LPVOID)-1)
 668         return ret;
 669
 670     /* mmap() failed; if this is because the file offset is not    */
 671     /* page-aligned (EINVAL), or because the underlying filesystem */
 672     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 673
 674     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 675     if (prot & PROT_WRITE)
 676     {
 677         /* We cannot fake shared write mappings */
 678 #ifdef MAP_SHARED
 679         if (flags & MAP_SHARED) return ret;
 680 #endif
 681 #ifdef MAP_PRIVATE
 682         if (!(flags & MAP_PRIVATE)) return ret;
 683 #endif
 684     }
 685
 686     /* Reserve the memory with an anonymous mmap */
 687     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 688     if (ret == (LPVOID)-1) return ret;
 689     /* Now read in the file */
 690     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 691     {
 692         munmap( ret, size );
 693         return (LPVOID)-1;
 694     }
 695     read( fd, ret, size );
 696     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 697     mprotect( ret, size, prot );  /* Set the right protection */
 698     return ret;
 699 }
 700
 701
 702 /***********************************************************************
 703  *             VirtualAlloc   (KERNEL32.548)
 704  * Reserves or commits a region of pages in virtual address space
 705  *
 706  * RETURNS
 707  *      Base address of allocated region of pages
 708  *      NULL: Failure
 709  */
 710 LPVOID WINAPI VirtualAlloc(
 711               LPVOID addr,  /* [in] Address of region to reserve or commit */
 712               DWORD size,   /* [in] Size of region */
 713               DWORD type,   /* [in] Type of allocation */
 714               DWORD protect /* [in] Type of access protection */
 715 ) {
 716     FILE_VIEW *view;
 717     UINT base, ptr, view_size;
 718     BYTE vprot;
 719
 720     TRACE("%08x %08lx %lx %08lx\n",
 721                      (UINT)addr, size, type, protect );
 722
 723     /* Round parameters to a page boundary */
 724
 725     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 726     {
 727         SetLastError( ERROR_OUTOFMEMORY );
 728         return NULL;
 729     }
 730     if (addr)
 731     {
 732         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 733             base = (UINT)addr & ~granularity_mask;
 734         else
 735             base = ROUND_ADDR( addr );
 736         size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
 737         if ((base <= granularity_mask) || (base + size < base))
 738         {
 739             /* disallow low 64k and wrap-around */
 740             SetLastError( ERROR_INVALID_PARAMETER );
 741             return NULL;
 742         }
 743     }
 744     else
 745     {
 746         base = 0;
 747         size = (size + page_mask) & ~page_mask;
 748     }
 749
 750     if (type & MEM_TOP_DOWN) {
 751         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 752          *        Is there _ANY_ way to do it with UNIX mmap()?
 753          */
 754         WARN("MEM_TOP_DOWN ignored\n");
 755         type &= ~MEM_TOP_DOWN;
 756     }
 757     /* Compute the alloc type flags */
 758
 759     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 760         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 761     {
 762         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 763         SetLastError( ERROR_INVALID_PARAMETER );
 764         return NULL;
 765     }
 766     if (type & (MEM_COMMIT | MEM_SYSTEM))
 767         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 768     else vprot = 0;
 769
 770     /* Reserve the memory */
 771
 772     if ((type & MEM_RESERVE) || !base)
 773     {
 774         view_size = size + (base ? 0 : granularity_mask + 1);
 775         if (type & MEM_SYSTEM)
 776              ptr = base;
 777         else
 778             ptr = (UINT)wine_anon_mmap( (LPVOID)base, view_size, VIRTUAL_GetUnixProt( vprot ), 0 );
 779         if (ptr == (UINT)-1)
 780         {
 781             SetLastError( ERROR_OUTOFMEMORY );
 782             return NULL;
 783         }
 784         if (!base)
 785         {
 786             /* Release the extra memory while keeping the range */
 787             /* starting on a 64k boundary. */
 788
 789             if (ptr & granularity_mask)
 790             {
 791                 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
 792                 munmap( (void *)ptr, extra );
 793                 ptr += extra;
 794                 view_size -= extra;
 795             }
 796             if (view_size > size)
 797                 munmap( (void *)(ptr + size), view_size - size );
 798         }
 799         else if (ptr != base)
 800         {
 801             /* We couldn't get the address we wanted */
 802             munmap( (void *)ptr, view_size );
 803             SetLastError( ERROR_INVALID_ADDRESS );
 804             return NULL;
 805         }
 806         if (!(view = VIRTUAL_CreateView( ptr, size,
 807                                          VFLAG_VALLOC | ((type & MEM_SYSTEM) ? VFLAG_SYSTEM : 0),
 808                                          vprot, 0 )))
 809         {
 810             munmap( (void *)ptr, size );
 811             SetLastError( ERROR_OUTOFMEMORY );
 812             return NULL;
 813         }
 814         return (LPVOID)ptr;
 815     }
 816
 817     /* Commit the pages */
 818
 819     if (!(view = VIRTUAL_FindView( base )) ||
 820         (base + size > view->base + view->size))
 821     {
 822         SetLastError( ERROR_INVALID_ADDRESS );
 823         return NULL;
 824     }
 825
 826     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 827     return (LPVOID)base;
 828 }
 829
 830
 831 /***********************************************************************
 832  *             VirtualAllocEx   (KERNEL32.548)
 833  *
 834  * Seems to be just as VirtualAlloc, but with process handle.
 835  */
 836 LPVOID WINAPI VirtualAllocEx(
 837               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 838               LPVOID addr,  /* [in] Address of region to reserve or commit */
 839               DWORD size,   /* [in] Size of region */
 840               DWORD type,   /* [in] Type of allocation */
 841               DWORD protect /* [in] Type of access protection */
 842 ) {
 843     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 844         return VirtualAlloc( addr, size, type, protect );
 845     ERR("Unsupported on other process\n");
 846     return NULL;
 847 }
 848
 849
 850 /***********************************************************************
 851  *             VirtualFree   (KERNEL32.550)
 852  * Release or decommits a region of pages in virtual address space.
 853  *
 854  * RETURNS
 855  *      TRUE: Success
 856  *      FALSE: Failure
 857  */
 858 BOOL WINAPI VirtualFree(
 859               LPVOID addr, /* [in] Address of region of committed pages */
 860               DWORD size,  /* [in] Size of region */
 861               DWORD type   /* [in] Type of operation */
 862 ) {
 863     FILE_VIEW *view;
 864     UINT base;
 865
 866     TRACE("%08x %08lx %lx\n",
 867                      (UINT)addr, size, type );
 868
 869     /* Fix the parameters */
 870
 871     size = ROUND_SIZE( addr, size );
 872     base = ROUND_ADDR( addr );
 873
 874     if (!(view = VIRTUAL_FindView( base )) ||
 875         (base + size > view->base + view->size) ||
 876         !(view->flags & VFLAG_VALLOC))
 877     {
 878         SetLastError( ERROR_INVALID_PARAMETER );
 879         return FALSE;
 880     }
 881
 882     /* Compute the protection flags */
 883
 884     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 885     {
 886         ERR("called with wrong free type flags (%08lx) !\n", type);
 887         SetLastError( ERROR_INVALID_PARAMETER );
 888         return FALSE;
 889     }
 890
 891     /* Free the pages */
 892
 893     if (type == MEM_RELEASE)
 894     {
 895         if (size || (base != view->base))
 896         {
 897             SetLastError( ERROR_INVALID_PARAMETER );
 898             return FALSE;
 899         }
 900         VIRTUAL_DeleteView( view );
 901         return TRUE;
 902     }
 903
 904     /* Decommit the pages by remapping zero-pages instead */
 905
 906     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
 907         ERR( "Could not remap pages, expect trouble\n" );
 908     return VIRTUAL_SetProt( view, base, size, 0 );
 909 }
 910
 911
 912 /***********************************************************************
 913  *             VirtualLock   (KERNEL32.551)
 914  * Locks the specified region of virtual address space
 915  *
 916  * NOTE
 917  *      Always returns TRUE
 918  *
 919  * RETURNS
 920  *      TRUE: Success
 921  *      FALSE: Failure
 922  */
 923 BOOL WINAPI VirtualLock(
 924               LPVOID addr, /* [in] Address of first byte of range to lock */
 925               DWORD size   /* [in] Number of bytes in range to lock */
 926 ) {
 927     return TRUE;
 928 }
 929
 930
 931 /***********************************************************************
 932  *             VirtualUnlock   (KERNEL32.556)
 933  * Unlocks a range of pages in the virtual address space
 934  *
 935  * NOTE
 936  *      Always returns TRUE
 937  *
 938  * RETURNS
 939  *      TRUE: Success
 940  *      FALSE: Failure
 941  */
 942 BOOL WINAPI VirtualUnlock(
 943               LPVOID addr, /* [in] Address of first byte of range */
 944               DWORD size   /* [in] Number of bytes in range */
 945 ) {
 946     return TRUE;
 947 }
 948
 949
 950 /***********************************************************************
 951  *             VirtualProtect   (KERNEL32.552)
 952  * Changes the access protection on a region of committed pages
 953  *
 954  * RETURNS
 955  *      TRUE: Success
 956  *      FALSE: Failure
 957  */
 958 BOOL WINAPI VirtualProtect(
 959               LPVOID addr,     /* [in] Address of region of committed pages */
 960               DWORD size,      /* [in] Size of region */
 961               DWORD new_prot,  /* [in] Desired access protection */
 962               LPDWORD old_prot /* [out] Address of variable to get old protection */
 963 ) {
 964     FILE_VIEW *view;
 965     UINT base, i;
 966     BYTE vprot, *p;
 967
 968     TRACE("%08x %08lx %08lx\n",
 969                      (UINT)addr, size, new_prot );
 970
 971     /* Fix the parameters */
 972
 973     size = ROUND_SIZE( addr, size );
 974     base = ROUND_ADDR( addr );
 975
 976     if (!(view = VIRTUAL_FindView( base )) ||
 977         (base + size > view->base + view->size))
 978     {
 979         SetLastError( ERROR_INVALID_PARAMETER );
 980         return FALSE;
 981     }
 982
 983     /* Make sure all the pages are committed */
 984
 985     p = view->prot + ((base - view->base) >> page_shift);
 986     for (i = size >> page_shift; i; i--, p++)
 987     {
 988         if (!(*p & VPROT_COMMITTED))
 989         {
 990             SetLastError( ERROR_INVALID_PARAMETER );
 991             return FALSE;
 992         }
 993     }
 994
 995     if (old_prot) VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 996     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 997     return VIRTUAL_SetProt( view, base, size, vprot );
 998 }
 999
1000
1001 /***********************************************************************
1002  *             VirtualProtectEx   (KERNEL32.553)
1003  * Changes the access protection on a region of committed pages in the
1004  * virtual address space of a specified process
1005  *
1006  * RETURNS
1007  *      TRUE: Success
1008  *      FALSE: Failure
1009  */
1010 BOOL WINAPI VirtualProtectEx(
1011               HANDLE handle, /* [in]  Handle of process */
1012               LPVOID addr,     /* [in]  Address of region of committed pages */
1013               DWORD size,      /* [in]  Size of region */
1014               DWORD new_prot,  /* [in]  Desired access protection */
1015               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1016 {
1017     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1018         return VirtualProtect( addr, size, new_prot, old_prot );
1019     ERR("Unsupported on other process\n");
1020     return FALSE;
1021 }
1022
1023
1024 /***********************************************************************
1025  *             VirtualQuery   (KERNEL32.554)
1026  * Provides info about a range of pages in virtual address space
1027  *
1028  * RETURNS
1029  *      Number of bytes returned in information buffer
1030  *      or 0 if addr is >= 0xc0000000 (kernel space).
1031  */
1032 DWORD WINAPI VirtualQuery(
1033              LPCVOID addr,                    /* [in]  Address of region */
1034              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1035              DWORD len                        /* [in]  Size of buffer */
1036 ) {
1037     FILE_VIEW *view;
1038     UINT base;
1039     UINT alloc_base = 0;
1040     UINT size = 0;
1041
1042     if (addr >= (void*)0xc0000000) return 0;
1043
1044     base = ROUND_ADDR( addr );
1045
1046     /* Find the view containing the address */
1047
1048     EnterCriticalSection(&csVirtual);
1049     view = VIRTUAL_FirstView;
1050     for (;;)
1051     {
1052         if (!view)
1053         {
1054             size = 0xffff0000 - alloc_base;
1055             break;
1056         }
1057         if (view->base > base)
1058         {
1059             size = view->base - alloc_base;
1060             view = NULL;
1061             break;
1062         }
1063         if (view->base + view->size > base)
1064         {
1065             alloc_base = view->base;
1066             size = view->size;
1067             break;
1068         }
1069         alloc_base = view->base + view->size;
1070         view = view->next;
1071     }
1072     LeaveCriticalSection(&csVirtual);
1073
1074     /* Fill the info structure */
1075
1076     if (!view)
1077     {
1078         info->State             = MEM_FREE;
1079         info->Protect           = 0;
1080         info->AllocationProtect = 0;
1081         info->Type              = 0;
1082     }
1083     else
1084     {
1085         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1086         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1087         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1088             if (view->prot[size >> page_shift] != vprot) break;
1089         info->AllocationProtect = view->protect;
1090         info->Type              = MEM_PRIVATE;  /* FIXME */
1091     }
1092
1093     info->BaseAddress    = (LPVOID)base;
1094     info->AllocationBase = (LPVOID)alloc_base;
1095     info->RegionSize     = size - (base - alloc_base);
1096     return sizeof(*info);
1097 }
1098
1099
1100 /***********************************************************************
1101  *             VirtualQueryEx   (KERNEL32.555)
1102  * Provides info about a range of pages in virtual address space of a
1103  * specified process
1104  *
1105  * RETURNS
1106  *      Number of bytes returned in information buffer
1107  */
1108 DWORD WINAPI VirtualQueryEx(
1109              HANDLE handle,                 /* [in] Handle of process */
1110              LPCVOID addr,                    /* [in] Address of region */
1111              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1112              DWORD len                        /* [in] Size of buffer */ )
1113 {
1114     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1115         return VirtualQuery( addr, info, len );
1116     ERR("Unsupported on other process\n");
1117     return 0;
1118 }
1119
1120
1121 /***********************************************************************
1122  *             IsBadReadPtr   (KERNEL32.354)
1123  *
1124  * RETURNS
1125  *      FALSE: Process has read access to entire block
1126  *      TRUE: Otherwise
1127  */
1128 BOOL WINAPI IsBadReadPtr(
1129               LPCVOID ptr, /* [in] Address of memory block */
1130               UINT size )  /* [in] Size of block */
1131 {
1132     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1133     __TRY
1134     {
1135         volatile const char *p = ptr;
1136         char dummy;
1137         UINT count = size;
1138
1139         while (count > page_size)
1140         {
1141             dummy = *p;
1142             p += page_size;
1143             count -= page_size;
1144         }
1145         dummy = p[0];
1146         dummy = p[count - 1];
1147     }
1148     __EXCEPT(page_fault) { return TRUE; }
1149     __ENDTRY
1150     return FALSE;
1151 }
1152
1153
1154 /***********************************************************************
1155  *             IsBadWritePtr   (KERNEL32.357)
1156  *
1157  * RETURNS
1158  *      FALSE: Process has write access to entire block
1159  *      TRUE: Otherwise
1160  */
1161 BOOL WINAPI IsBadWritePtr(
1162               LPVOID ptr, /* [in] Address of memory block */
1163               UINT size ) /* [in] Size of block in bytes */
1164 {
1165     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1166     __TRY
1167     {
1168         volatile char *p = ptr;
1169         UINT count = size;
1170
1171         while (count > page_size)
1172         {
1173             *p |= 0;
1174             p += page_size;
1175             count -= page_size;
1176         }
1177         p[0] |= 0;
1178         p[count - 1] |= 0;
1179     }
1180     __EXCEPT(page_fault) { return TRUE; }
1181     __ENDTRY
1182     return FALSE;
1183 }
1184
1185
1186 /***********************************************************************
1187  *             IsBadHugeReadPtr   (KERNEL32.352)
1188  * RETURNS
1189  *      FALSE: Process has read access to entire block
1190  *      TRUE: Otherwise
1191  */
1192 BOOL WINAPI IsBadHugeReadPtr(
1193               LPCVOID ptr, /* [in] Address of memory block */
1194               UINT size  /* [in] Size of block */
1195 ) {
1196     return IsBadReadPtr( ptr, size );
1197 }
1198
1199
1200 /***********************************************************************
1201  *             IsBadHugeWritePtr   (KERNEL32.353)
1202  * RETURNS
1203  *      FALSE: Process has write access to entire block
1204  *      TRUE: Otherwise
1205  */
1206 BOOL WINAPI IsBadHugeWritePtr(
1207               LPVOID ptr, /* [in] Address of memory block */
1208               UINT size /* [in] Size of block */
1209 ) {
1210     return IsBadWritePtr( ptr, size );
1211 }
1212
1213
1214 /***********************************************************************
1215  *             IsBadCodePtr   (KERNEL32.351)
1216  *
1217  * RETURNS
1218  *      FALSE: Process has read access to specified memory
1219  *      TRUE: Otherwise
1220  */
1221 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1222 {
1223     return IsBadReadPtr( ptr, 1 );
1224 }
1225
1226
1227 /***********************************************************************
1228  *             IsBadStringPtrA   (KERNEL32.355)
1229  *
1230  * RETURNS
1231  *      FALSE: Read access to all bytes in string
1232  *      TRUE: Else
1233  */
1234 BOOL WINAPI IsBadStringPtrA(
1235               LPCSTR str, /* [in] Address of string */
1236               UINT max )  /* [in] Maximum size of string */
1237 {
1238     __TRY
1239     {
1240         volatile const char *p = str;
1241         while (p != str + max) if (!*p++) break;
1242     }
1243     __EXCEPT(page_fault) { return TRUE; }
1244     __ENDTRY
1245     return FALSE;
1246 }
1247
1248
1249 /***********************************************************************
1250  *             IsBadStringPtrW   (KERNEL32.356)
1251  * See IsBadStringPtrA
1252  */
1253 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1254 {
1255     __TRY
1256     {
1257         volatile const WCHAR *p = str;
1258         while (p != str + max) if (!*p++) break;
1259     }
1260     __EXCEPT(page_fault) { return TRUE; }
1261     __ENDTRY
1262     return FALSE;
1263 }
1264
1265
1266 /***********************************************************************
1267  *             CreateFileMappingA   (KERNEL32.46)
1268  * Creates a named or unnamed file-mapping object for the specified file
1269  *
1270  * RETURNS
1271  *      Handle: Success
1272  *      0: Mapping object does not exist
1273  *      NULL: Failure
1274  */
1275 HANDLE WINAPI CreateFileMappingA(
1276                 HANDLE hFile,   /* [in] Handle of file to map */
1277                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1278                 DWORD protect,   /* [in] Protection for mapping object */
1279                 DWORD size_high, /* [in] High-order 32 bits of object size */
1280                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1281                 LPCSTR name      /* [in] Name of file-mapping object */ )
1282 {
1283     HANDLE ret;
1284     BYTE vprot;
1285     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1286
1287     /* Check parameters */
1288
1289     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1290           hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1291
1292     if (len > MAX_PATH)
1293     {
1294         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1295         return 0;
1296     }
1297     vprot = VIRTUAL_GetProt( protect );
1298     if (protect & SEC_RESERVE)
1299     {
1300         if (hFile != INVALID_HANDLE_VALUE)
1301         {
1302             SetLastError( ERROR_INVALID_PARAMETER );
1303             return 0;
1304         }
1305     }
1306     else vprot |= VPROT_COMMITTED;
1307     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1308     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1309
1310     /* Create the server object */
1311
1312     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1313     SERVER_START_REQ
1314     {
1315         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1316                                                                len * sizeof(WCHAR) );
1317         req->file_handle = hFile;
1318         req->size_high   = size_high;
1319         req->size_low    = size_low;
1320         req->protect     = vprot;
1321         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1322         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1323         SetLastError(0);
1324         server_call( REQ_CREATE_MAPPING );
1325         ret = req->handle;
1326     }
1327     SERVER_END_REQ;
1328     return ret;
1329 }
1330
1331
1332 /***********************************************************************
1333  *             CreateFileMappingW   (KERNEL32.47)
1334  * See CreateFileMappingA
1335  */
1336 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1337                                   DWORD protect, DWORD size_high,
1338                                   DWORD size_low, LPCWSTR name )
1339 {
1340     HANDLE ret;
1341     BYTE vprot;
1342     DWORD len = name ? strlenW(name) : 0;
1343
1344     /* Check parameters */
1345
1346     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1347           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1348
1349     if (len > MAX_PATH)
1350     {
1351         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1352         return 0;
1353     }
1354
1355     vprot = VIRTUAL_GetProt( protect );
1356     if (protect & SEC_RESERVE)
1357     {
1358         if (hFile != INVALID_HANDLE_VALUE)
1359         {
1360             SetLastError( ERROR_INVALID_PARAMETER );
1361             return 0;
1362         }
1363     }
1364     else vprot |= VPROT_COMMITTED;
1365     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1366     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1367
1368     /* Create the server object */
1369
1370     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1371     SERVER_START_REQ
1372     {
1373         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1374                                                                len * sizeof(WCHAR) );
1375         req->file_handle = hFile;
1376         req->size_high   = size_high;
1377         req->size_low    = size_low;
1378         req->protect     = vprot;
1379         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1380         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1381         SetLastError(0);
1382         server_call( REQ_CREATE_MAPPING );
1383         ret = req->handle;
1384     }
1385     SERVER_END_REQ;
1386     return ret;
1387 }
1388
1389
1390 /***********************************************************************
1391  *             OpenFileMappingA   (KERNEL32.397)
1392  * Opens a named file-mapping object.
1393  *
1394  * RETURNS
1395  *      Handle: Success
1396  *      NULL: Failure
1397  */
1398 HANDLE WINAPI OpenFileMappingA(
1399                 DWORD access,   /* [in] Access mode */
1400                 BOOL inherit, /* [in] Inherit flag */
1401                 LPCSTR name )   /* [in] Name of file-mapping object */
1402 {
1403     HANDLE ret;
1404     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1405     if (len > MAX_PATH)
1406     {
1407         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1408         return 0;
1409     }
1410     SERVER_START_REQ
1411     {
1412         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1413
1414         req->access  = access;
1415         req->inherit = inherit;
1416         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1417         server_call( REQ_OPEN_MAPPING );
1418         ret = req->handle;
1419     }
1420     SERVER_END_REQ;
1421     return ret;
1422 }
1423
1424
1425 /***********************************************************************
1426  *             OpenFileMappingW   (KERNEL32.398)
1427  * See OpenFileMappingA
1428  */
1429 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1430 {
1431     HANDLE ret;
1432     DWORD len = name ? strlenW(name) : 0;
1433     if (len > MAX_PATH)
1434     {
1435         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1436         return 0;
1437     }
1438     SERVER_START_REQ
1439     {
1440         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1441
1442         req->access  = access;
1443         req->inherit = inherit;
1444         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1445         server_call( REQ_OPEN_MAPPING );
1446         ret = req->handle;
1447     }
1448     SERVER_END_REQ;
1449     return ret;
1450 }
1451
1452
1453 /***********************************************************************
1454  *             MapViewOfFile   (KERNEL32.385)
1455  * Maps a view of a file into the address space
1456  *
1457  * RETURNS
1458  *      Starting address of mapped view
1459  *      NULL: Failure
1460  */
1461 LPVOID WINAPI MapViewOfFile(
1462               HANDLE mapping,  /* [in] File-mapping object to map */
1463               DWORD access,      /* [in] Access mode */
1464               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1465               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1466               DWORD count        /* [in] Number of bytes to map */
1467 ) {
1468     return MapViewOfFileEx( mapping, access, offset_high,
1469                             offset_low, count, NULL );
1470 }
1471
1472
1473 /***********************************************************************
1474  *             MapViewOfFileEx   (KERNEL32.386)
1475  * Maps a view of a file into the address space
1476  *
1477  * RETURNS
1478  *      Starting address of mapped view
1479  *      NULL: Failure
1480  */
1481 LPVOID WINAPI MapViewOfFileEx(
1482               HANDLE handle,   /* [in] File-mapping object to map */
1483               DWORD access,      /* [in] Access mode */
1484               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1485               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1486               DWORD count,       /* [in] Number of bytes to map */
1487               LPVOID addr        /* [in] Suggested starting address for mapped view */
1488 ) {
1489     FILE_VIEW *view;
1490     UINT ptr = (UINT)-1, size = 0;
1491     int flags = MAP_PRIVATE;
1492     int unix_handle = -1;
1493     int prot, anonymous, res;
1494     void *base;
1495     DWORD size_low, size_high, header_size, shared_size;
1496     HANDLE shared_file;
1497
1498     /* Check parameters */
1499
1500     if ((offset_low & granularity_mask) ||
1501         (addr && ((UINT)addr & granularity_mask)))
1502     {
1503         SetLastError( ERROR_INVALID_PARAMETER );
1504         return NULL;
1505     }
1506
1507     SERVER_START_REQ
1508     {
1509         struct get_mapping_info_request *req = server_alloc_req( sizeof(*req), 0 );
1510         req->handle = handle;
1511         res = server_call( REQ_GET_MAPPING_INFO );
1512         prot        = req->protect;
1513         base        = req->base;
1514         size_low    = req->size_low;
1515         size_high   = req->size_high;
1516         header_size = req->header_size;
1517         shared_file = req->shared_file;
1518         shared_size = req->shared_size;
1519         anonymous   = req->anonymous;
1520     }
1521     SERVER_END_REQ;
1522     if (res) goto error;
1523
1524     if (!anonymous)
1525     {
1526         if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1527     }
1528
1529     if (prot & VPROT_IMAGE)
1530         return map_image( handle, unix_handle, base, size_low, header_size,
1531                           shared_file, shared_size );
1532
1533
1534     if (size_high || offset_high)
1535         ERR("Offsets larger than 4Gb not supported\n");
1536
1537     if ((offset_low >= size_low) ||
1538         (count > size_low - offset_low))
1539     {
1540         SetLastError( ERROR_INVALID_PARAMETER );
1541         goto error;
1542     }
1543     if (count) size = ROUND_SIZE( offset_low, count );
1544     else size = size_low - offset_low;
1545
1546     switch(access)
1547     {
1548     case FILE_MAP_ALL_ACCESS:
1549     case FILE_MAP_WRITE:
1550     case FILE_MAP_WRITE | FILE_MAP_READ:
1551         if (!(prot & VPROT_WRITE))
1552         {
1553             SetLastError( ERROR_INVALID_PARAMETER );
1554             goto error;
1555         }
1556         flags = MAP_SHARED;
1557         /* fall through */
1558     case FILE_MAP_READ:
1559     case FILE_MAP_COPY:
1560     case FILE_MAP_COPY | FILE_MAP_READ:
1561         if (prot & VPROT_READ) break;
1562         /* fall through */
1563     default:
1564         SetLastError( ERROR_INVALID_PARAMETER );
1565         goto error;
1566     }
1567
1568     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1569      * which has a view of this mapping commits some pages, they will
1570      * appear commited in all other processes, which have the same
1571      * view created. Since we don`t support this yet, we create the
1572      * whole mapping commited.
1573      */
1574     prot |= VPROT_COMMITTED;
1575
1576     /* Map the file */
1577
1578     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1579
1580     ptr = (UINT)VIRTUAL_mmap( unix_handle, addr, size, offset_low,
1581                               VIRTUAL_GetUnixProt( prot ), flags );
1582     if (ptr == (UINT)-1) {
1583         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1584          * Platform Differences":
1585          * Windows NT: ERROR_INVALID_PARAMETER
1586          * Windows 95: ERROR_INVALID_ADDRESS.
1587          */
1588         if (errno==ENOMEM)
1589             SetLastError( ERROR_OUTOFMEMORY );
1590         else
1591         {
1592             if (GetVersion() & 0x80000000)  /* win95 */
1593             {
1594                 TRACE("setting ERROR_INVALID_ADDRESS for WinXX\n");
1595                 SetLastError( ERROR_INVALID_ADDRESS );
1596             }
1597             else
1598             {
1599                 TRACE("setting ERROR_INVALID_PARAMETER for NTXX\n");
1600                 SetLastError( ERROR_INVALID_PARAMETER );
1601             }
1602         }
1603         goto error;
1604     }
1605
1606     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1607     {
1608         SetLastError( ERROR_OUTOFMEMORY );
1609         goto error;
1610     }
1611     if (unix_handle != -1) close( unix_handle );
1612     return (LPVOID)ptr;
1613
1614 error:
1615     if (unix_handle != -1) close( unix_handle );
1616     if (ptr != (UINT)-1) munmap( (void *)ptr, size );
1617     return NULL;
1618 }
1619
1620
1621 /***********************************************************************
1622  *             FlushViewOfFile   (KERNEL32.262)
1623  * Writes to the disk a byte range within a mapped view of a file
1624  *
1625  * RETURNS
1626  *      TRUE: Success
1627  *      FALSE: Failure
1628  */
1629 BOOL WINAPI FlushViewOfFile(
1630               LPCVOID base, /* [in] Start address of byte range to flush */
1631               DWORD cbFlush /* [in] Number of bytes in range */
1632 ) {
1633     FILE_VIEW *view;
1634     UINT addr = ROUND_ADDR( base );
1635
1636     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1637                      base, cbFlush );
1638
1639     if (!(view = VIRTUAL_FindView( addr )))
1640     {
1641         SetLastError( ERROR_INVALID_PARAMETER );
1642         return FALSE;
1643     }
1644     if (!cbFlush) cbFlush = view->size;
1645     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1646     SetLastError( ERROR_INVALID_PARAMETER );
1647     return FALSE;
1648 }
1649
1650
1651 /***********************************************************************
1652  *             UnmapViewOfFile   (KERNEL32.540)
1653  * Unmaps a mapped view of a file.
1654  *
1655  * NOTES
1656  *      Should addr be an LPCVOID?
1657  *
1658  * RETURNS
1659  *      TRUE: Success
1660  *      FALSE: Failure
1661  */
1662 BOOL WINAPI UnmapViewOfFile(
1663               LPVOID addr /* [in] Address where mapped view begins */
1664 ) {
1665     FILE_VIEW *view;
1666     UINT base = ROUND_ADDR( addr );
1667     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1668     {
1669         SetLastError( ERROR_INVALID_PARAMETER );
1670         return FALSE;
1671     }
1672     VIRTUAL_DeleteView( view );
1673     return TRUE;
1674 }