memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <fcntl.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <sys/types.h>
  14 #include <sys/mman.h>
  15 #include "winbase.h"
  16 #include "winerror.h"
  17 #include "file.h"
  18 #include "heap.h"
  19 #include "process.h"
  20 #include "xmalloc.h"
  21 #include "debug.h"
  22
  23 #ifndef MS_SYNC
  24 #define MS_SYNC 0
  25 #endif
  26
  27 /* File mapping */
  28 typedef struct
  29 {
  30     K32OBJ        header;
  31     DWORD         size_high;
  32     DWORD         size_low;
  33     FILE_OBJECT  *file;
  34     BYTE          protect;
  35 } FILE_MAPPING;
  36
  37 /* File view */
  38 typedef struct _FV
  39 {
  40     struct _FV   *next;     /* Next view */
  41     struct _FV   *prev;     /* Prev view */
  42     UINT32        base;     /* Base address */
  43     UINT32        size;     /* Size in bytes */
  44     UINT32        flags;    /* Allocation flags */
  45     UINT32        offset;   /* Offset from start of mapped file */
  46     FILE_MAPPING *mapping;  /* File mapping */
  47     BYTE          protect;  /* Protection for all pages at allocation time */
  48     BYTE          prot[1];  /* Protection byte for each page */
  49 } FILE_VIEW;
  50
  51 /* Per-page protection byte values */
  52 #define VPROT_READ       0x01
  53 #define VPROT_WRITE      0x02
  54 #define VPROT_EXEC       0x04
  55 #define VPROT_WRITECOPY  0x08
  56 #define VPROT_GUARD      0x10
  57 #define VPROT_NOCACHE    0x20
  58 #define VPROT_COMMITTED  0x40
  59
  60 /* Per-view flags */
  61 #define VFLAG_SYSTEM     0x01
  62
  63 /* Conversion from VPROT_* to Win32 flags */
  64 static const BYTE VIRTUAL_Win32Flags[16] =
  65 {
  66     PAGE_NOACCESS,              /* 0 */
  67     PAGE_READONLY,              /* READ */
  68     PAGE_READWRITE,             /* WRITE */
  69     PAGE_READWRITE,             /* READ | WRITE */
  70     PAGE_EXECUTE,               /* EXEC */
  71     PAGE_EXECUTE_READ,          /* READ | EXEC */
  72     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  73     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  74     PAGE_WRITECOPY,             /* WRITECOPY */
  75     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  76     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  77     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  78     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  79     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  80     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  81     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  82 };
  83
  84
  85 static FILE_VIEW *VIRTUAL_FirstView;
  86
  87 #ifdef __i386__
  88 /* These are always the same on an i386, and it will be faster this way */
  89 # define page_mask  0xfff
  90 # define page_shift 12
  91 # define granularity_mask 0xffff
  92 #else
  93 static UINT32 page_shift;
  94 static UINT32 page_mask;
  95 static UINT32 granularity_mask;  /* Allocation granularity (usually 64k) */
  96 #endif  /* __i386__ */
  97
  98 #define ROUND_ADDR(addr) \
  99    ((UINT32)(addr) & ~page_mask)
 100
 101 #define ROUND_SIZE(addr,size) \
 102    (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
 103
 104 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
 105
 106 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
 107 {
 108     /* Object cannot be waited upon, so we don't need these (except destroy) */
 109     NULL,                      /* signaled */
 110     NULL,                      /* satisfied */
 111     NULL,                      /* add_wait */
 112     NULL,                      /* remove_wait */
 113     NULL,                      /* read */
 114     NULL,                      /* write */
 115     VIRTUAL_DestroyMapping     /* destroy */
 116 };
 117
 118 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 119    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 120
 121 /***********************************************************************
 122  *           VIRTUAL_GetProtStr
 123  */
 124 static const char *VIRTUAL_GetProtStr( BYTE prot )
 125 {
 126     static char buffer[6];
 127     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 128     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 129     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 130     buffer[3] = (prot & VPROT_WRITE) ?
 131                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 132     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 133     buffer[5] = 0;
 134     return buffer;
 135 }
 136
 137
 138 /***********************************************************************
 139  *           VIRTUAL_DumpView
 140  */
 141 static void VIRTUAL_DumpView( FILE_VIEW *view )
 142 {
 143     UINT32 i, count;
 144     UINT32 addr = view->base;
 145     BYTE prot = view->prot[0];
 146
 147     DUMP( "View: %08x - %08x%s",
 148           view->base, view->base + view->size - 1,
 149           (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 150     if (view->mapping && view->mapping->file)
 151         DUMP( " %s @ %08x\n", view->mapping->file->unix_name, view->offset );
 152     else
 153         DUMP( " (anonymous)\n");
 154
 155     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 156     {
 157         if (view->prot[i] == prot) continue;
 158         DUMP( "      %08x - %08x %s\n",
 159               addr, addr + (count << page_shift) - 1,
 160               VIRTUAL_GetProtStr(prot) );
 161         addr += (count << page_shift);
 162         prot = view->prot[i];
 163         count = 0;
 164     }
 165     if (count)
 166         DUMP( "      %08x - %08x %s\n",
 167               addr, addr + (count << page_shift) - 1,
 168               VIRTUAL_GetProtStr(prot) );
 169 }
 170
 171
 172 /***********************************************************************
 173  *           VIRTUAL_Dump
 174  */
 175 void VIRTUAL_Dump(void)
 176 {
 177     FILE_VIEW *view = VIRTUAL_FirstView;
 178     DUMP( "\nDump of all virtual memory views:\n\n" );
 179     while (view)
 180     {
 181         VIRTUAL_DumpView( view );
 182         view = view->next;
 183     }
 184 }
 185
 186
 187 /***********************************************************************
 188  *           VIRTUAL_FindView
 189  *
 190  * Find the view containing a given address.
 191  *
 192  * RETURNS
 193  *      View: Success
 194  *      NULL: Failure
 195  */
 196 static FILE_VIEW *VIRTUAL_FindView(
 197                   UINT32 addr /* [in] Address */
 198 ) {
 199     FILE_VIEW *view = VIRTUAL_FirstView;
 200     while (view)
 201     {
 202         if (view->base > addr) return NULL;
 203         if (view->base + view->size > addr) return view;
 204         view = view->next;
 205     }
 206     return NULL;
 207 }
 208
 209
 210 /***********************************************************************
 211  *           VIRTUAL_CreateView
 212  *
 213  * Create a new view and add it in the linked list.
 214  */
 215 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
 216                                       UINT32 flags, BYTE vprot,
 217                                       FILE_MAPPING *mapping )
 218 {
 219     FILE_VIEW *view, *prev;
 220
 221     /* Create the view structure */
 222
 223     assert( !(base & page_mask) );
 224     assert( !(size & page_mask) );
 225     size >>= page_shift;
 226     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 227     view->base    = base;
 228     view->size    = size << page_shift;
 229     view->flags   = flags;
 230     view->offset  = offset;
 231     view->mapping = mapping;
 232     view->protect = vprot;
 233     memset( view->prot, vprot, size );
 234
 235     /* Insert it in the linked list */
 236
 237     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 238     {
 239         view->next = VIRTUAL_FirstView;
 240         view->prev = NULL;
 241         if (view->next) view->next->prev = view;
 242         VIRTUAL_FirstView = view;
 243     }
 244     else
 245     {
 246         prev = VIRTUAL_FirstView;
 247         while (prev->next && (prev->next->base < base)) prev = prev->next;
 248         view->next = prev->next;
 249         view->prev = prev;
 250         if (view->next) view->next->prev = view;
 251         prev->next  = view;
 252     }
 253     VIRTUAL_DEBUG_DUMP_VIEW( view );
 254     return view;
 255 }
 256
 257
 258 /***********************************************************************
 259  *           VIRTUAL_DeleteView
 260  * Deletes a view.
 261  *
 262  * RETURNS
 263  *      None
 264  */
 265 static void VIRTUAL_DeleteView(
 266             FILE_VIEW *view /* [in] View */
 267 ) {
 268     FILE_munmap( (void *)view->base, 0, view->size );
 269     if (view->next) view->next->prev = view->prev;
 270     if (view->prev) view->prev->next = view->next;
 271     else VIRTUAL_FirstView = view->next;
 272     if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
 273     free( view );
 274 }
 275
 276
 277 /***********************************************************************
 278  *           VIRTUAL_GetUnixProt
 279  *
 280  * Convert page protections to protection for mmap/mprotect.
 281  */
 282 static int VIRTUAL_GetUnixProt( BYTE vprot )
 283 {
 284     int prot = 0;
 285     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 286     {
 287         if (vprot & VPROT_READ) prot |= PROT_READ;
 288         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 289         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 290     }
 291     return prot;
 292 }
 293
 294
 295 /***********************************************************************
 296  *           VIRTUAL_GetWin32Prot
 297  *
 298  * Convert page protections to Win32 flags.
 299  *
 300  * RETURNS
 301  *      None
 302  */
 303 static void VIRTUAL_GetWin32Prot(
 304             BYTE vprot,     /* [in] Page protection flags */
 305             DWORD *protect, /* [out] Location to store Win32 protection flags */
 306             DWORD *state    /* [out] Location to store mem state flag */
 307 ) {
 308     if (protect) {
 309         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 310         if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
 311         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 312     }
 313
 314     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 315 }
 316
 317
 318 /***********************************************************************
 319  *           VIRTUAL_GetProt
 320  *
 321  * Build page protections from Win32 flags.
 322  *
 323  * RETURNS
 324  *      Value of page protection flags
 325  */
 326 static BYTE VIRTUAL_GetProt(
 327             DWORD protect  /* [in] Win32 protection flags */
 328 ) {
 329     BYTE vprot;
 330
 331     switch(protect & 0xff)
 332     {
 333     case PAGE_READONLY:
 334         vprot = VPROT_READ;
 335         break;
 336     case PAGE_READWRITE:
 337         vprot = VPROT_READ | VPROT_WRITE;
 338         break;
 339     case PAGE_WRITECOPY:
 340         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 341         break;
 342     case PAGE_EXECUTE:
 343         vprot = VPROT_EXEC;
 344         break;
 345     case PAGE_EXECUTE_READ:
 346         vprot = VPROT_EXEC | VPROT_READ;
 347         break;
 348     case PAGE_EXECUTE_READWRITE:
 349         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 350         break;
 351     case PAGE_EXECUTE_WRITECOPY:
 352         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 353         break;
 354     case PAGE_NOACCESS:
 355     default:
 356         vprot = 0;
 357         break;
 358     }
 359     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 360     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 361     return vprot;
 362 }
 363
 364
 365 /***********************************************************************
 366  *           VIRTUAL_SetProt
 367  *
 368  * Change the protection of a range of pages.
 369  *
 370  * RETURNS
 371  *      TRUE: Success
 372  *      FALSE: Failure
 373  */
 374 static BOOL32 VIRTUAL_SetProt(
 375               FILE_VIEW *view, /* [in] Pointer to view */
 376               UINT32 base,     /* [in] Starting address */
 377               UINT32 size,     /* [in] Size in bytes */
 378               BYTE vprot       /* [in] Protections to use */
 379 ) {
 380     TRACE(virtual, "%08x-%08x %s\n",
 381                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 382
 383     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 384         return FALSE;  /* FIXME: last error */
 385
 386     memset( view->prot + ((base - view->base) >> page_shift),
 387             vprot, size >> page_shift );
 388     VIRTUAL_DEBUG_DUMP_VIEW( view );
 389     return TRUE;
 390 }
 391
 392
 393 /***********************************************************************
 394  *             VIRTUAL_CheckFlags
 395  *
 396  * Check that all pages in a range have the given flags.
 397  *
 398  * RETURNS
 399  *      TRUE: They do
 400  *      FALSE: They do not
 401  */
 402 static BOOL32 VIRTUAL_CheckFlags(
 403               UINT32 base, /* [in] Starting address */
 404               UINT32 size, /* [in] Size in bytes */
 405               BYTE flags   /* [in] Flags to check for */
 406 ) {
 407     FILE_VIEW *view;
 408     UINT32 page;
 409
 410     if (!size) return TRUE;
 411     if (!(view = VIRTUAL_FindView( base ))) return FALSE;
 412     if (view->base + view->size < base + size) return FALSE;
 413     page = (base - view->base) >> page_shift;
 414     size = ROUND_SIZE( base, size ) >> page_shift;
 415     while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
 416     return TRUE;
 417 }
 418
 419
 420 /***********************************************************************
 421  *           VIRTUAL_Init
 422  */
 423 BOOL32 VIRTUAL_Init(void)
 424 {
 425 #ifndef __i386__
 426     DWORD page_size;
 427
 428 # ifdef HAVE_GETPAGESIZE
 429     page_size = getpagesize();
 430 # else
 431 #  ifdef __svr4__
 432     page_size = sysconf(_SC_PAGESIZE);
 433 #  else
 434 #   error Cannot get the page size on this platform
 435 #  endif
 436 # endif
 437     page_mask = page_size - 1;
 438     granularity_mask = 0xffff;  /* hard-coded for now */
 439     /* Make sure we have a power of 2 */
 440     assert( !(page_size & page_mask) );
 441     page_shift = 0;
 442     while ((1 << page_shift) != page_size) page_shift++;
 443 #endif  /* !__i386__ */
 444
 445 #ifdef linux
 446     {
 447         /* Do not use stdio here since it may temporarily change the size
 448          * of some segments (ie libc6 adds 0x1000 per open FILE)
 449          */
 450         int fd = open ("/proc/self/maps", O_RDONLY);
 451         if (fd >= 0)
 452         {
 453             char buffer[512]; /* line might be rather long in 2.1 */
 454
 455             for (;;)
 456             {
 457                 int start, end, offset;
 458                 char r, w, x, p;
 459                 BYTE vprot = VPROT_COMMITTED;
 460
 461                 char * ptr = buffer;
 462                 int count = sizeof(buffer);
 463                 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
 464                     ptr++;
 465
 466                 if (*ptr != '\n') break;
 467                 *ptr = '\0';
 468
 469                 sscanf( buffer, "%x-%x %c%c%c%c %x",
 470                         &start, &end, &r, &w, &x, &p, &offset );
 471                 if (r == 'r') vprot |= VPROT_READ;
 472                 if (w == 'w') vprot |= VPROT_WRITE;
 473                 if (x == 'x') vprot |= VPROT_EXEC;
 474                 if (p == 'p') vprot |= VPROT_WRITECOPY;
 475                 VIRTUAL_CreateView( start, end - start, 0,
 476                                     VFLAG_SYSTEM, vprot, NULL );
 477             }
 478             close (fd);
 479         }
 480     }
 481 #endif  /* linux */
 482     return TRUE;
 483 }
 484
 485
 486 /***********************************************************************
 487  *           VIRTUAL_GetPageSize
 488  */
 489 DWORD VIRTUAL_GetPageSize(void)
 490 {
 491     return 1 << page_shift;
 492 }
 493
 494
 495 /***********************************************************************
 496  *           VIRTUAL_GetGranularity
 497  */
 498 DWORD VIRTUAL_GetGranularity(void)
 499 {
 500     return granularity_mask + 1;
 501 }
 502
 503
 504 /***********************************************************************
 505  *             VirtualAlloc   (KERNEL32.548)
 506  * Reserves or commits a region of pages in virtual address space
 507  *
 508  * RETURNS
 509  *      Base address of allocated region of pages
 510  *      NULL: Failure
 511  */
 512 LPVOID WINAPI VirtualAlloc(
 513               LPVOID addr,  /* [in] Address of region to reserve or commit */
 514               DWORD size,   /* [in] Size of region */
 515               DWORD type,   /* [in] Type of allocation */
 516               DWORD protect /* [in] Type of access protection */
 517 ) {
 518     FILE_VIEW *view;
 519     UINT32 base, ptr, view_size;
 520     BYTE vprot;
 521
 522     TRACE(virtual, "%08x %08lx %lx %08lx\n",
 523                      (UINT32)addr, size, type, protect );
 524
 525     /* Round parameters to a page boundary */
 526
 527     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 528     {
 529         SetLastError( ERROR_OUTOFMEMORY );
 530         return NULL;
 531     }
 532     if (addr)
 533     {
 534         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 535             base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
 536         else
 537             base = ROUND_ADDR( addr );
 538         size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
 539         if (base + size < base)  /* Disallow wrap-around */
 540         {
 541             SetLastError( ERROR_INVALID_PARAMETER );
 542             return NULL;
 543         }
 544     }
 545     else
 546     {
 547         base = 0;
 548         size = (size + page_mask) & ~page_mask;
 549     }
 550
 551     if (type & MEM_TOP_DOWN) {
 552         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 553          *        Is there _ANY_ way to do it with UNIX mmap()?
 554          */
 555         WARN(virtual,"MEM_TOP_DOWN ignored\n");
 556         type &= ~MEM_TOP_DOWN;
 557     }
 558     /* Compute the protection flags */
 559
 560     if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
 561         (type & ~(MEM_COMMIT | MEM_RESERVE)))
 562     {
 563         SetLastError( ERROR_INVALID_PARAMETER );
 564         return NULL;
 565     }
 566     if (type & MEM_COMMIT)
 567         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 568     else vprot = 0;
 569
 570     /* Reserve the memory */
 571
 572     if ((type & MEM_RESERVE) || !base)
 573     {
 574         view_size = size + (base ? 0 : granularity_mask + 1);
 575         ptr = (UINT32)FILE_dommap( NULL, (LPVOID)base, 0, view_size, 0, 0,
 576                                    VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 577         if (ptr == (UINT32)-1)
 578         {
 579             SetLastError( ERROR_OUTOFMEMORY );
 580             return NULL;
 581         }
 582         if (!base)
 583         {
 584             /* Release the extra memory while keeping the range */
 585             /* starting on a 64k boundary. */
 586
 587             if (ptr & granularity_mask)
 588             {
 589                 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
 590                 FILE_munmap( (void *)ptr, 0, extra );
 591                 ptr += extra;
 592                 view_size -= extra;
 593             }
 594             if (view_size > size)
 595                 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
 596         }
 597         else if (ptr != base)
 598         {
 599             /* We couldn't get the address we wanted */
 600             FILE_munmap( (void *)ptr, 0, view_size );
 601             SetLastError( ERROR_INVALID_ADDRESS );
 602             return NULL;
 603         }
 604         if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
 605         {
 606             FILE_munmap( (void *)ptr, 0, size );
 607             SetLastError( ERROR_OUTOFMEMORY );
 608             return NULL;
 609         }
 610         VIRTUAL_DEBUG_DUMP_VIEW( view );
 611         return (LPVOID)ptr;
 612     }
 613
 614     /* Commit the pages */
 615
 616     if (!(view = VIRTUAL_FindView( base )) ||
 617         (base + size > view->base + view->size))
 618     {
 619         SetLastError( ERROR_INVALID_PARAMETER );
 620         return NULL;
 621     }
 622
 623     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 624     return (LPVOID)base;
 625 }
 626
 627
 628 /***********************************************************************
 629  *             VirtualFree   (KERNEL32.550)
 630  * Release or decommits a region of pages in virtual address space.
 631  *
 632  * RETURNS
 633  *      TRUE: Success
 634  *      FALSE: Failure
 635  */
 636 BOOL32 WINAPI VirtualFree(
 637               LPVOID addr, /* [in] Address of region of committed pages */
 638               DWORD size,  /* [in] Size of region */
 639               DWORD type   /* [in] Type of operation */
 640 ) {
 641     FILE_VIEW *view;
 642     UINT32 base;
 643
 644     TRACE(virtual, "%08x %08lx %lx\n",
 645                      (UINT32)addr, size, type );
 646
 647     /* Fix the parameters */
 648
 649     size = ROUND_SIZE( addr, size );
 650     base = ROUND_ADDR( addr );
 651
 652     if (!(view = VIRTUAL_FindView( base )) ||
 653         (base + size > view->base + view->size))
 654     {
 655         SetLastError( ERROR_INVALID_PARAMETER );
 656         return FALSE;
 657     }
 658
 659     /* Compute the protection flags */
 660
 661     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 662     {
 663         SetLastError( ERROR_INVALID_PARAMETER );
 664         return FALSE;
 665     }
 666
 667     /* Free the pages */
 668
 669     if (type == MEM_RELEASE)
 670     {
 671         if (size || (base != view->base))
 672         {
 673             SetLastError( ERROR_INVALID_PARAMETER );
 674             return FALSE;
 675         }
 676         VIRTUAL_DeleteView( view );
 677         return TRUE;
 678     }
 679
 680     /* Decommit the pages */
 681     return VIRTUAL_SetProt( view, base, size, 0 );
 682 }
 683
 684
 685 /***********************************************************************
 686  *             VirtualLock   (KERNEL32.551)
 687  * Locks the specified region of virtual address space
 688  *
 689  * NOTE
 690  *      Always returns TRUE
 691  *
 692  * RETURNS
 693  *      TRUE: Success
 694  *      FALSE: Failure
 695  */
 696 BOOL32 WINAPI VirtualLock(
 697               LPVOID addr, /* [in] Address of first byte of range to lock */
 698               DWORD size   /* [in] Number of bytes in range to lock */
 699 ) {
 700     return TRUE;
 701 }
 702
 703
 704 /***********************************************************************
 705  *             VirtualUnlock   (KERNEL32.556)
 706  * Unlocks a range of pages in the virtual address space
 707  *
 708  * NOTE
 709  *      Always returns TRUE
 710  *
 711  * RETURNS
 712  *      TRUE: Success
 713  *      FALSE: Failure
 714  */
 715 BOOL32 WINAPI VirtualUnlock(
 716               LPVOID addr, /* [in] Address of first byte of range */
 717               DWORD size   /* [in] Number of bytes in range */
 718 ) {
 719     return TRUE;
 720 }
 721
 722
 723 /***********************************************************************
 724  *             VirtualProtect   (KERNEL32.552)
 725  * Changes the access protection on a region of committed pages
 726  *
 727  * RETURNS
 728  *      TRUE: Success
 729  *      FALSE: Failure
 730  */
 731 BOOL32 WINAPI VirtualProtect(
 732               LPVOID addr,     /* [in] Address of region of committed pages */
 733               DWORD size,      /* [in] Size of region */
 734               DWORD new_prot,  /* [in] Desired access protection */
 735               LPDWORD old_prot /* [out] Address of variable to get old protection */
 736 ) {
 737     FILE_VIEW *view;
 738     UINT32 base, i;
 739     BYTE vprot, *p;
 740
 741     TRACE(virtual, "%08x %08lx %08lx\n",
 742                      (UINT32)addr, size, new_prot );
 743
 744     /* Fix the parameters */
 745
 746     size = ROUND_SIZE( addr, size );
 747     base = ROUND_ADDR( addr );
 748
 749     if (!(view = VIRTUAL_FindView( base )) ||
 750         (base + size > view->base + view->size))
 751     {
 752         SetLastError( ERROR_INVALID_PARAMETER );
 753         return FALSE;
 754     }
 755
 756     /* Make sure all the pages are committed */
 757
 758     p = view->prot + ((base - view->base) >> page_shift);
 759     for (i = size >> page_shift; i; i--, p++)
 760     {
 761         if (!(*p & VPROT_COMMITTED))
 762         {
 763             SetLastError( ERROR_INVALID_PARAMETER );
 764             return FALSE;
 765         }
 766     }
 767
 768     VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 769     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 770     return VIRTUAL_SetProt( view, base, size, vprot );
 771 }
 772
 773
 774 /***********************************************************************
 775  *             VirtualProtectEx   (KERNEL32.553)
 776  * Changes the access protection on a region of committed pages in the
 777  * virtual address space of a specified process
 778  *
 779  * RETURNS
 780  *      TRUE: Success
 781  *      FALSE: Failure
 782  */
 783 BOOL32 WINAPI VirtualProtectEx(
 784               HANDLE32 handle, /* [in]  Handle of process */
 785               LPVOID addr,     /* [in]  Address of region of committed pages */
 786               DWORD size,      /* [in]  Size of region */
 787               DWORD new_prot,  /* [in]  Desired access protection */
 788               LPDWORD old_prot /* [out] Address of variable to get old protection */
 789 ) {
 790     BOOL32 ret = FALSE;
 791
 792     PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_VM_OPERATION );
 793     if (pdb)
 794     {
 795         if (pdb == PROCESS_Current())
 796             ret = VirtualProtect( addr, size, new_prot, old_prot );
 797         else
 798             ERR(virtual,"Unsupported on other process\n");
 799         K32OBJ_DecCount( &pdb->header );
 800     }
 801     return ret;
 802 }
 803
 804
 805 /***********************************************************************
 806  *             VirtualQuery   (KERNEL32.554)
 807  * Provides info about a range of pages in virtual address space
 808  *
 809  * RETURNS
 810  *      Number of bytes returned in information buffer
 811  */
 812 DWORD WINAPI VirtualQuery(
 813              LPCVOID addr,                    /* [in]  Address of region */
 814              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 815              DWORD len                        /* [in]  Size of buffer */
 816 ) {
 817     FILE_VIEW *view = VIRTUAL_FirstView;
 818     UINT32 base = ROUND_ADDR( addr );
 819     UINT32 alloc_base = 0;
 820     UINT32 size = 0;
 821
 822     /* Find the view containing the address */
 823
 824     for (;;)
 825     {
 826         if (!view)
 827         {
 828             size = 0xffff0000 - alloc_base;
 829             break;
 830         }
 831         if (view->base > base)
 832         {
 833             size = view->base - alloc_base;
 834             view = NULL;
 835             break;
 836         }
 837         if (view->base + view->size > base)
 838         {
 839             alloc_base = view->base;
 840             size = view->size;
 841             break;
 842         }
 843         alloc_base = view->base + view->size;
 844         view = view->next;
 845     }
 846
 847     /* Fill the info structure */
 848
 849     if (!view)
 850     {
 851         info->State             = MEM_FREE;
 852         info->Protect           = 0;
 853         info->AllocationProtect = 0;
 854         info->Type              = 0;
 855     }
 856     else
 857     {
 858         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
 859         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
 860         for (size = base - alloc_base; size < view->size; size += page_mask+1)
 861             if (view->prot[size >> page_shift] != vprot) break;
 862         info->AllocationProtect = view->protect;
 863         info->Type              = MEM_PRIVATE;  /* FIXME */
 864     }
 865
 866     info->BaseAddress    = (LPVOID)base;
 867     info->AllocationBase = (LPVOID)alloc_base;
 868     info->RegionSize     = size - (base - alloc_base);
 869     return sizeof(*info);
 870 }
 871
 872
 873 /***********************************************************************
 874  *             VirtualQueryEx   (KERNEL32.555)
 875  * Provides info about a range of pages in virtual address space of a
 876  * specified process
 877  *
 878  * RETURNS
 879  *      Number of bytes returned in information buffer
 880  */
 881 DWORD WINAPI VirtualQueryEx(
 882              HANDLE32 handle,                 /* [in] Handle of process */
 883              LPCVOID addr,                    /* [in] Address of region */
 884              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 885              DWORD len                        /* [in] Size of buffer */
 886 ) {
 887     DWORD ret = len;
 888
 889     PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_QUERY_INFORMATION );
 890     if (pdb)
 891     {
 892         if (pdb == PROCESS_Current())
 893             ret = VirtualQuery( addr, info, len );
 894         else
 895             ERR(virtual,"Unsupported on other process\n");
 896         K32OBJ_DecCount( &pdb->header );
 897     }
 898     return ret;
 899 }
 900
 901
 902 /***********************************************************************
 903  *             IsBadReadPtr32   (KERNEL32.354)
 904  *
 905  * RETURNS
 906  *      FALSE: Process has read access to entire block
 907  *      TRUE: Otherwise
 908  */
 909 BOOL32 WINAPI IsBadReadPtr32(
 910               LPCVOID ptr, /* Address of memory block */
 911               UINT32 size  /* Size of block */
 912 ) {
 913     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 914                                 VPROT_READ | VPROT_COMMITTED );
 915 }
 916
 917
 918 /***********************************************************************
 919  *             IsBadWritePtr32   (KERNEL32.357)
 920  *
 921  * RETURNS
 922  *      FALSE: Process has write access to entire block
 923  *      TRUE: Otherwise
 924  */
 925 BOOL32 WINAPI IsBadWritePtr32(
 926               LPVOID ptr, /* [in] Address of memory block */
 927               UINT32 size /* [in] Size of block in bytes */
 928 ) {
 929     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 930                                 VPROT_WRITE | VPROT_COMMITTED );
 931 }
 932
 933
 934 /***********************************************************************
 935  *             IsBadHugeReadPtr32   (KERNEL32.352)
 936  * RETURNS
 937  *      FALSE: Process has read access to entire block
 938  *      TRUE: Otherwise
 939  */
 940 BOOL32 WINAPI IsBadHugeReadPtr32(
 941               LPCVOID ptr, /* [in] Address of memory block */
 942               UINT32 size  /* [in] Size of block */
 943 ) {
 944     return IsBadReadPtr32( ptr, size );
 945 }
 946
 947
 948 /***********************************************************************
 949  *             IsBadHugeWritePtr32   (KERNEL32.353)
 950  * RETURNS
 951  *      FALSE: Process has write access to entire block
 952  *      TRUE: Otherwise
 953  */
 954 BOOL32 WINAPI IsBadHugeWritePtr32(
 955               LPVOID ptr, /* [in] Address of memory block */
 956               UINT32 size /* [in] Size of block */
 957 ) {
 958     return IsBadWritePtr32( ptr, size );
 959 }
 960
 961
 962 /***********************************************************************
 963  *             IsBadCodePtr32   (KERNEL32.351)
 964  *
 965  * RETURNS
 966  *      FALSE: Process has read access to specified memory
 967  *      TRUE: Otherwise
 968  */
 969 BOOL32 WINAPI IsBadCodePtr32(
 970               FARPROC32 ptr /* [in] Address of function */
 971 ) {
 972     return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
 973 }
 974
 975
 976 /***********************************************************************
 977  *             IsBadStringPtr32A   (KERNEL32.355)
 978  *
 979  * RETURNS
 980  *      FALSE: Read access to all bytes in string
 981  *      TRUE: Else
 982  */
 983 BOOL32 WINAPI IsBadStringPtr32A(
 984               LPCSTR str, /* [in] Address of string */
 985               UINT32 max  /* [in] Maximum size of string */
 986 ) {
 987     FILE_VIEW *view;
 988     UINT32 page, count;
 989
 990     if (!max) return FALSE;
 991     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
 992     page  = ((UINT32)str - view->base) >> page_shift;
 993     count = page_mask + 1 - ((UINT32)str & page_mask);
 994
 995     while (max)
 996     {
 997         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
 998                                                 (VPROT_READ | VPROT_COMMITTED))
 999             return TRUE;
1000         if (count > max) count = max;
1001         max -= count;
1002         while (count--) if (!*str++) return FALSE;
1003         if (++page >= view->size >> page_shift) return TRUE;
1004         count = page_mask + 1;
1005     }
1006     return FALSE;
1007 }
1008
1009
1010 /***********************************************************************
1011  *             IsBadStringPtr32W   (KERNEL32.356)
1012  * See IsBadStringPtr32A
1013  */
1014 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
1015 {
1016     FILE_VIEW *view;
1017     UINT32 page, count;
1018
1019     if (!max) return FALSE;
1020     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1021     page  = ((UINT32)str - view->base) >> page_shift;
1022     count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
1023
1024     while (max)
1025     {
1026         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1027                                                 (VPROT_READ | VPROT_COMMITTED))
1028             return TRUE;
1029         if (count > max) count = max;
1030         max -= count;
1031         while (count--) if (!*str++) return FALSE;
1032         if (++page >= view->size >> page_shift) return TRUE;
1033         count = (page_mask + 1) / sizeof(WCHAR);
1034     }
1035     return FALSE;
1036 }
1037
1038
1039 /***********************************************************************
1040  *             CreateFileMapping32A   (KERNEL32.46)
1041  * Creates a named or unnamed file-mapping object for the specified file
1042  *
1043  * RETURNS
1044  *      Handle: Success
1045  *      0: Mapping object does not exist
1046  *      NULL: Failure
1047  */
1048 HANDLE32 WINAPI CreateFileMapping32A(
1049                 HFILE32 hFile,   /* [in] Handle of file to map */
1050                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1051                 DWORD protect,   /* [in] Protection for mapping object */
1052                 DWORD size_high, /* [in] High-order 32 bits of object size */
1053                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1054                 LPCSTR name      /* [in] Name of file-mapping object */ )
1055 {
1056     FILE_MAPPING *mapping = NULL;
1057     HANDLE32 handle;
1058     BYTE vprot;
1059     BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1060
1061     /* First search for an object with the same name */
1062
1063     K32OBJ *obj = K32OBJ_FindName( name );
1064     if (obj)
1065     {
1066         if (obj->type == K32OBJ_MEM_MAPPED_FILE)
1067         {
1068             SetLastError( ERROR_ALREADY_EXISTS );
1069             handle = HANDLE_Alloc( PROCESS_Current(), obj,
1070                                    FILE_MAP_ALL_ACCESS /*FIXME*/, inherit );
1071         }
1072         else
1073         {
1074             SetLastError( ERROR_DUP_NAME );
1075             handle = 0;
1076         }
1077         K32OBJ_DecCount( obj );
1078         return handle;
1079     }
1080
1081     /* Check parameters */
1082
1083     TRACE(virtual,"(%x,%p,%08lx,%08lx%08lx,%s)\n",
1084           hFile, sa, protect, size_high, size_low, name );
1085
1086     vprot = VIRTUAL_GetProt( protect );
1087     if (protect & SEC_RESERVE)
1088     {
1089         if (hFile != INVALID_HANDLE_VALUE32)
1090         {
1091             SetLastError( ERROR_INVALID_PARAMETER );
1092             return 0;
1093         }
1094     }
1095     else vprot |= VPROT_COMMITTED;
1096     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1097
1098     /* Compute the size and extend the file if necessary */
1099
1100     if (hFile == INVALID_HANDLE_VALUE32)
1101     {
1102         if (!size_high && !size_low)
1103         {
1104             SetLastError( ERROR_INVALID_PARAMETER );
1105             return 0;
1106         }
1107         obj = NULL;
1108     }
1109     else  /* We have a file */
1110     {
1111         BY_HANDLE_FILE_INFORMATION info;
1112         DWORD access = GENERIC_READ;
1113
1114         if (((protect & 0xff) == PAGE_READWRITE) ||
1115             ((protect & 0xff) == PAGE_WRITECOPY) ||
1116             ((protect & 0xff) == PAGE_EXECUTE_READWRITE) ||
1117             ((protect & 0xff) == PAGE_EXECUTE_WRITECOPY))
1118                 access |= GENERIC_WRITE;
1119         if (!(obj = HANDLE_GetObjPtr( PROCESS_Current(), hFile,
1120                                       K32OBJ_FILE, access )))
1121             goto error;
1122
1123         if (!GetFileInformationByHandle( hFile, &info )) goto error;
1124         if (!size_high && !size_low)
1125         {
1126             size_high = info.nFileSizeHigh;
1127             size_low  = info.nFileSizeLow;
1128         }
1129         else if ((size_high > info.nFileSizeHigh) ||
1130                  ((size_high == info.nFileSizeHigh) &&
1131                   (size_low > info.nFileSizeLow)))
1132         {
1133             /* We have to grow the file */
1134             if (SetFilePointer( hFile, size_low, &size_high,
1135                                 FILE_BEGIN ) == 0xffffffff) goto error;
1136             if (!SetEndOfFile( hFile )) goto error;
1137         }
1138     }
1139
1140     /* Allocate the mapping object */
1141
1142     if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
1143     mapping->header.type     = K32OBJ_MEM_MAPPED_FILE;
1144     mapping->header.refcount = 1;
1145     mapping->protect         = vprot;
1146     mapping->size_high       = size_high;
1147     mapping->size_low        = ROUND_SIZE( 0, size_low );
1148     mapping->file            = (FILE_OBJECT *)obj;
1149
1150     if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
1151     else handle = HANDLE_Alloc( PROCESS_Current(), &mapping->header,
1152                                 FILE_MAP_ALL_ACCESS /*FIXME*/, inherit );
1153     K32OBJ_DecCount( &mapping->header );
1154     return handle;
1155
1156 error:
1157     if (obj) K32OBJ_DecCount( obj );
1158     if (mapping) HeapFree( SystemHeap, 0, mapping );
1159     return 0;
1160 }
1161
1162
1163 /***********************************************************************
1164  *             CreateFileMapping32W   (KERNEL32.47)
1165  * See CreateFileMapping32A
1166  */
1167 HANDLE32 WINAPI CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
1168                                       DWORD protect, DWORD size_high,
1169                                       DWORD size_low, LPCWSTR name )
1170 {
1171     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1172     HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
1173                                          size_high, size_low, nameA );
1174     HeapFree( GetProcessHeap(), 0, nameA );
1175     return ret;
1176 }
1177
1178
1179 /***********************************************************************
1180  *             OpenFileMapping32A   (KERNEL32.397)
1181  * Opens a named file-mapping object.
1182  *
1183  * RETURNS
1184  *      Handle: Success
1185  *      NULL: Failure
1186  */
1187 HANDLE32 WINAPI OpenFileMapping32A(
1188                 DWORD access,   /* [in] Access mode */
1189                 BOOL32 inherit, /* [in] Inherit flag */
1190                 LPCSTR name     /* [in] Name of file-mapping object */
1191 ) {
1192     HANDLE32 handle = 0;
1193     K32OBJ *obj;
1194     SYSTEM_LOCK();
1195     if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
1196     {
1197         handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit );
1198         K32OBJ_DecCount( obj );
1199     }
1200     SYSTEM_UNLOCK();
1201     return handle;
1202 }
1203
1204
1205 /***********************************************************************
1206  *             OpenFileMapping32W   (KERNEL32.398)
1207  * See OpenFileMapping32A
1208  */
1209 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1210 {
1211     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1212     HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1213     HeapFree( GetProcessHeap(), 0, nameA );
1214     return ret;
1215 }
1216
1217
1218 /***********************************************************************
1219  *           VIRTUAL_DestroyMapping
1220  *
1221  * Destroy a FILE_MAPPING object.
1222  */
1223 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1224 {
1225     FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1226     assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1227
1228     if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
1229     ptr->type = K32OBJ_UNKNOWN;
1230     HeapFree( SystemHeap, 0, mapping );
1231 }
1232
1233
1234 /***********************************************************************
1235  *             MapViewOfFile   (KERNEL32.385)
1236  * Maps a view of a file into the address space
1237  *
1238  * RETURNS
1239  *      Starting address of mapped view
1240  *      NULL: Failure
1241  */
1242 LPVOID WINAPI MapViewOfFile(
1243               HANDLE32 mapping,  /* [in] File-mapping object to map */
1244               DWORD access,      /* [in] Access mode */
1245               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1246               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1247               DWORD count        /* [in] Number of bytes to map */
1248 ) {
1249     return MapViewOfFileEx( mapping, access, offset_high,
1250                             offset_low, count, NULL );
1251 }
1252
1253
1254 /***********************************************************************
1255  *             MapViewOfFileEx   (KERNEL32.386)
1256  * Maps a view of a file into the address space
1257  *
1258  * RETURNS
1259  *      Starting address of mapped view
1260  *      NULL: Failure
1261  */
1262 LPVOID WINAPI MapViewOfFileEx(
1263               HANDLE32 handle,   /* [in] File-mapping object to map */
1264               DWORD access,      /* [in] Access mode */
1265               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1266               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1267               DWORD count,       /* [in] Number of bytes to map */
1268               LPVOID addr        /* [in] Suggested starting address for mapped view */
1269 ) {
1270     FILE_MAPPING *mapping;
1271     FILE_VIEW *view;
1272     UINT32 ptr = (UINT32)-1, size = 0;
1273     int flags = MAP_PRIVATE;
1274
1275     /* Check parameters */
1276
1277     if ((offset_low & granularity_mask) ||
1278         (addr && ((UINT32)addr & granularity_mask)))
1279     {
1280         SetLastError( ERROR_INVALID_PARAMETER );
1281         return NULL;
1282     }
1283
1284     if (!(mapping = (FILE_MAPPING *)HANDLE_GetObjPtr( PROCESS_Current(),
1285                                                       handle,
1286                                                       K32OBJ_MEM_MAPPED_FILE,
1287                                                       0  /* FIXME */ )))
1288         return NULL;
1289
1290     if (mapping->size_high || offset_high)
1291         ERR(virtual, "Offsets larger than 4Gb not supported\n");
1292
1293     if ((offset_low >= mapping->size_low) ||
1294         (count > mapping->size_low - offset_low))
1295     {
1296         SetLastError( ERROR_INVALID_PARAMETER );
1297         goto error;
1298     }
1299     if (count) size = ROUND_SIZE( offset_low, count );
1300     else size = mapping->size_low - offset_low;
1301
1302     switch(access)
1303     {
1304     case FILE_MAP_ALL_ACCESS:
1305     case FILE_MAP_WRITE:
1306     case FILE_MAP_WRITE | FILE_MAP_READ:
1307         if (!(mapping->protect & VPROT_WRITE))
1308         {
1309             SetLastError( ERROR_INVALID_PARAMETER );
1310             goto error;
1311         }
1312         flags = MAP_SHARED;
1313         /* fall through */
1314     case FILE_MAP_READ:
1315     case FILE_MAP_COPY:
1316     case FILE_MAP_COPY | FILE_MAP_READ:
1317         if (mapping->protect & VPROT_READ) break;
1318         /* fall through */
1319     default:
1320         SetLastError( ERROR_INVALID_PARAMETER );
1321         goto error;
1322     }
1323
1324     /* Map the file */
1325
1326     TRACE(virtual, "handle=%x size=%x offset=%lx\n",
1327                      handle, size, offset_low );
1328
1329     ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low,
1330                                VIRTUAL_GetUnixProt( mapping->protect ),
1331                                flags );
1332     if (ptr == (UINT32)-1)
1333     {
1334         SetLastError( ERROR_OUTOFMEMORY );
1335         goto error;
1336     }
1337
1338     if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1339                                      mapping->protect, mapping )))
1340     {
1341         SetLastError( ERROR_OUTOFMEMORY );
1342         goto error;
1343     }
1344     return (LPVOID)ptr;
1345
1346 error:
1347     if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1348     K32OBJ_DecCount( &mapping->header );
1349     return NULL;
1350 }
1351
1352
1353 /***********************************************************************
1354  *             FlushViewOfFile   (KERNEL32.262)
1355  * Writes to the disk a byte range within a mapped view of a file
1356  *
1357  * RETURNS
1358  *      TRUE: Success
1359  *      FALSE: Failure
1360  */
1361 BOOL32 WINAPI FlushViewOfFile(
1362               LPCVOID base, /* [in] Start address of byte range to flush */
1363               DWORD cbFlush /* [in] Number of bytes in range */
1364 ) {
1365     FILE_VIEW *view;
1366     UINT32 addr = ROUND_ADDR( base );
1367
1368     TRACE(virtual, "FlushViewOfFile at %p for %ld bytes\n",
1369                      base, cbFlush );
1370
1371     if (!(view = VIRTUAL_FindView( addr )))
1372     {
1373         SetLastError( ERROR_INVALID_PARAMETER );
1374         return FALSE;
1375     }
1376     if (!cbFlush) cbFlush = view->size;
1377     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1378     SetLastError( ERROR_INVALID_PARAMETER );
1379     return FALSE;
1380 }
1381
1382
1383 /***********************************************************************
1384  *             UnmapViewOfFile   (KERNEL32.540)
1385  * Unmaps a mapped view of a file.
1386  *
1387  * NOTES
1388  *      Should addr be an LPCVOID?
1389  *
1390  * RETURNS
1391  *      TRUE: Success
1392  *      FALSE: Failure
1393  */
1394 BOOL32 WINAPI UnmapViewOfFile(
1395               LPVOID addr /* [in] Address where mapped view begins */
1396 ) {
1397     FILE_VIEW *view;
1398     UINT32 base = ROUND_ADDR( addr );
1399     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1400     {
1401         SetLastError( ERROR_INVALID_PARAMETER );
1402         return FALSE;
1403     }
1404     VIRTUAL_DeleteView( view );
1405     return TRUE;
1406 }