memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <errno.h>
   9 #include <sys/errno.h>
  10 #include <fcntl.h>
  11 #include <unistd.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <sys/types.h>
  15 #include <sys/mman.h>
  16 #include "winbase.h"
  17 #include "winerror.h"
  18 #include "file.h"
  19 #include "heap.h"
  20 #include "process.h"
  21 #include "xmalloc.h"
  22 #include "global.h"
  23 #include "debug.h"
  24
  25 #ifndef MS_SYNC
  26 #define MS_SYNC 0
  27 #endif
  28
  29 /* File mapping */
  30 typedef struct
  31 {
  32     K32OBJ        header;
  33     DWORD         size_high;
  34     DWORD         size_low;
  35     FILE_OBJECT  *file;
  36     BYTE          protect;
  37 } FILE_MAPPING;
  38
  39 /* File view */
  40 typedef struct _FV
  41 {
  42     struct _FV   *next;        /* Next view */
  43     struct _FV   *prev;        /* Prev view */
  44     UINT32        base;        /* Base address */
  45     UINT32        size;        /* Size in bytes */
  46     UINT32        flags;       /* Allocation flags */
  47     UINT32        offset;      /* Offset from start of mapped file */
  48     FILE_MAPPING *mapping;     /* File mapping */
  49     HANDLERPROC   handlerProc; /* Fault handler */
  50     LPVOID        handlerArg;  /* Fault handler argument */
  51     BYTE          protect;     /* Protection for all pages at allocation time */
  52     BYTE          prot[1];     /* Protection byte for each page */
  53 } FILE_VIEW;
  54
  55 /* Per-page protection byte values */
  56 #define VPROT_READ       0x01
  57 #define VPROT_WRITE      0x02
  58 #define VPROT_EXEC       0x04
  59 #define VPROT_WRITECOPY  0x08
  60 #define VPROT_GUARD      0x10
  61 #define VPROT_NOCACHE    0x20
  62 #define VPROT_COMMITTED  0x40
  63
  64 /* Per-view flags */
  65 #define VFLAG_SYSTEM     0x01
  66
  67 /* Conversion from VPROT_* to Win32 flags */
  68 static const BYTE VIRTUAL_Win32Flags[16] =
  69 {
  70     PAGE_NOACCESS,              /* 0 */
  71     PAGE_READONLY,              /* READ */
  72     PAGE_READWRITE,             /* WRITE */
  73     PAGE_READWRITE,             /* READ | WRITE */
  74     PAGE_EXECUTE,               /* EXEC */
  75     PAGE_EXECUTE_READ,          /* READ | EXEC */
  76     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  77     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  78     PAGE_WRITECOPY,             /* WRITECOPY */
  79     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  80     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  81     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  82     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  83     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  84     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  85     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  86 };
  87
  88
  89 static FILE_VIEW *VIRTUAL_FirstView;
  90
  91 #ifdef __i386__
  92 /* These are always the same on an i386, and it will be faster this way */
  93 # define page_mask  0xfff
  94 # define page_shift 12
  95 # define granularity_mask 0xffff
  96 #else
  97 static UINT32 page_shift;
  98 static UINT32 page_mask;
  99 static UINT32 granularity_mask;  /* Allocation granularity (usually 64k) */
 100 #endif  /* __i386__ */
 101
 102 #define ROUND_ADDR(addr) \
 103    ((UINT32)(addr) & ~page_mask)
 104
 105 #define ROUND_SIZE(addr,size) \
 106    (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
 107
 108 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
 109
 110 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
 111 {
 112     /* Object cannot be waited upon, so we don't need these (except destroy) */
 113     NULL,                      /* signaled */
 114     NULL,                      /* satisfied */
 115     NULL,                      /* add_wait */
 116     NULL,                      /* remove_wait */
 117     NULL,                      /* read */
 118     NULL,                      /* write */
 119     VIRTUAL_DestroyMapping     /* destroy */
 120 };
 121
 122 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 123    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 124
 125 /***********************************************************************
 126  *           VIRTUAL_GetProtStr
 127  */
 128 static const char *VIRTUAL_GetProtStr( BYTE prot )
 129 {
 130     static char buffer[6];
 131     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 132     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 133     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 134     buffer[3] = (prot & VPROT_WRITE) ?
 135                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 136     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 137     buffer[5] = 0;
 138     return buffer;
 139 }
 140
 141
 142 /***********************************************************************
 143  *           VIRTUAL_DumpView
 144  */
 145 static void VIRTUAL_DumpView( FILE_VIEW *view )
 146 {
 147     UINT32 i, count;
 148     UINT32 addr = view->base;
 149     BYTE prot = view->prot[0];
 150
 151     DUMP( "View: %08x - %08x%s",
 152           view->base, view->base + view->size - 1,
 153           (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 154     if (view->mapping && view->mapping->file)
 155         DUMP( " %s @ %08x\n", view->mapping->file->unix_name, view->offset );
 156     else
 157         DUMP( " (anonymous)\n");
 158
 159     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 160     {
 161         if (view->prot[i] == prot) continue;
 162         DUMP( "      %08x - %08x %s\n",
 163               addr, addr + (count << page_shift) - 1,
 164               VIRTUAL_GetProtStr(prot) );
 165         addr += (count << page_shift);
 166         prot = view->prot[i];
 167         count = 0;
 168     }
 169     if (count)
 170         DUMP( "      %08x - %08x %s\n",
 171               addr, addr + (count << page_shift) - 1,
 172               VIRTUAL_GetProtStr(prot) );
 173 }
 174
 175
 176 /***********************************************************************
 177  *           VIRTUAL_Dump
 178  */
 179 void VIRTUAL_Dump(void)
 180 {
 181     FILE_VIEW *view = VIRTUAL_FirstView;
 182     DUMP( "\nDump of all virtual memory views:\n\n" );
 183     while (view)
 184     {
 185         VIRTUAL_DumpView( view );
 186         view = view->next;
 187     }
 188 }
 189
 190
 191 /***********************************************************************
 192  *           VIRTUAL_FindView
 193  *
 194  * Find the view containing a given address.
 195  *
 196  * RETURNS
 197  *      View: Success
 198  *      NULL: Failure
 199  */
 200 static FILE_VIEW *VIRTUAL_FindView(
 201                   UINT32 addr /* [in] Address */
 202 ) {
 203     FILE_VIEW *view = VIRTUAL_FirstView;
 204     while (view)
 205     {
 206         if (view->base > addr) return NULL;
 207         if (view->base + view->size > addr) return view;
 208         view = view->next;
 209     }
 210     return NULL;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           VIRTUAL_CreateView
 216  *
 217  * Create a new view and add it in the linked list.
 218  */
 219 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
 220                                       UINT32 flags, BYTE vprot,
 221                                       FILE_MAPPING *mapping )
 222 {
 223     FILE_VIEW *view, *prev;
 224
 225     /* Create the view structure */
 226
 227     assert( !(base & page_mask) );
 228     assert( !(size & page_mask) );
 229     size >>= page_shift;
 230     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 231     view->base    = base;
 232     view->size    = size << page_shift;
 233     view->flags   = flags;
 234     view->offset  = offset;
 235     view->mapping = mapping;
 236     view->protect = vprot;
 237     memset( view->prot, vprot, size );
 238
 239     /* Insert it in the linked list */
 240
 241     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 242     {
 243         view->next = VIRTUAL_FirstView;
 244         view->prev = NULL;
 245         if (view->next) view->next->prev = view;
 246         VIRTUAL_FirstView = view;
 247     }
 248     else
 249     {
 250         prev = VIRTUAL_FirstView;
 251         while (prev->next && (prev->next->base < base)) prev = prev->next;
 252         view->next = prev->next;
 253         view->prev = prev;
 254         if (view->next) view->next->prev = view;
 255         prev->next  = view;
 256     }
 257     VIRTUAL_DEBUG_DUMP_VIEW( view );
 258     return view;
 259 }
 260
 261
 262 /***********************************************************************
 263  *           VIRTUAL_DeleteView
 264  * Deletes a view.
 265  *
 266  * RETURNS
 267  *      None
 268  */
 269 static void VIRTUAL_DeleteView(
 270             FILE_VIEW *view /* [in] View */
 271 ) {
 272     FILE_munmap( (void *)view->base, 0, view->size );
 273     if (view->next) view->next->prev = view->prev;
 274     if (view->prev) view->prev->next = view->next;
 275     else VIRTUAL_FirstView = view->next;
 276     if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
 277     free( view );
 278 }
 279
 280
 281 /***********************************************************************
 282  *           VIRTUAL_GetUnixProt
 283  *
 284  * Convert page protections to protection for mmap/mprotect.
 285  */
 286 static int VIRTUAL_GetUnixProt( BYTE vprot )
 287 {
 288     int prot = 0;
 289     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 290     {
 291         if (vprot & VPROT_READ) prot |= PROT_READ;
 292         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 293         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 294     }
 295     return prot;
 296 }
 297
 298
 299 /***********************************************************************
 300  *           VIRTUAL_GetWin32Prot
 301  *
 302  * Convert page protections to Win32 flags.
 303  *
 304  * RETURNS
 305  *      None
 306  */
 307 static void VIRTUAL_GetWin32Prot(
 308             BYTE vprot,     /* [in] Page protection flags */
 309             DWORD *protect, /* [out] Location to store Win32 protection flags */
 310             DWORD *state    /* [out] Location to store mem state flag */
 311 ) {
 312     if (protect) {
 313         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 314 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 315         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 316
 317         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 318     }
 319
 320     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 321 }
 322
 323
 324 /***********************************************************************
 325  *           VIRTUAL_GetProt
 326  *
 327  * Build page protections from Win32 flags.
 328  *
 329  * RETURNS
 330  *      Value of page protection flags
 331  */
 332 static BYTE VIRTUAL_GetProt(
 333             DWORD protect  /* [in] Win32 protection flags */
 334 ) {
 335     BYTE vprot;
 336
 337     switch(protect & 0xff)
 338     {
 339     case PAGE_READONLY:
 340         vprot = VPROT_READ;
 341         break;
 342     case PAGE_READWRITE:
 343         vprot = VPROT_READ | VPROT_WRITE;
 344         break;
 345     case PAGE_WRITECOPY:
 346         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 347         break;
 348     case PAGE_EXECUTE:
 349         vprot = VPROT_EXEC;
 350         break;
 351     case PAGE_EXECUTE_READ:
 352         vprot = VPROT_EXEC | VPROT_READ;
 353         break;
 354     case PAGE_EXECUTE_READWRITE:
 355         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 356         break;
 357     case PAGE_EXECUTE_WRITECOPY:
 358         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 359         break;
 360     case PAGE_NOACCESS:
 361     default:
 362         vprot = 0;
 363         break;
 364     }
 365     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 366     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 367     return vprot;
 368 }
 369
 370
 371 /***********************************************************************
 372  *           VIRTUAL_SetProt
 373  *
 374  * Change the protection of a range of pages.
 375  *
 376  * RETURNS
 377  *      TRUE: Success
 378  *      FALSE: Failure
 379  */
 380 static BOOL32 VIRTUAL_SetProt(
 381               FILE_VIEW *view, /* [in] Pointer to view */
 382               UINT32 base,     /* [in] Starting address */
 383               UINT32 size,     /* [in] Size in bytes */
 384               BYTE vprot       /* [in] Protections to use */
 385 ) {
 386     TRACE(virtual, "%08x-%08x %s\n",
 387                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 388
 389     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 390         return FALSE;  /* FIXME: last error */
 391
 392     memset( view->prot + ((base - view->base) >> page_shift),
 393             vprot, size >> page_shift );
 394     VIRTUAL_DEBUG_DUMP_VIEW( view );
 395     return TRUE;
 396 }
 397
 398
 399 /***********************************************************************
 400  *             VIRTUAL_CheckFlags
 401  *
 402  * Check that all pages in a range have the given flags.
 403  *
 404  * RETURNS
 405  *      TRUE: They do
 406  *      FALSE: They do not
 407  */
 408 static BOOL32 VIRTUAL_CheckFlags(
 409               UINT32 base, /* [in] Starting address */
 410               UINT32 size, /* [in] Size in bytes */
 411               BYTE flags   /* [in] Flags to check for */
 412 ) {
 413     FILE_VIEW *view;
 414     UINT32 page;
 415
 416     if (!size) return TRUE;
 417     if (!(view = VIRTUAL_FindView( base ))) return FALSE;
 418     if (view->base + view->size < base + size) return FALSE;
 419     page = (base - view->base) >> page_shift;
 420     size = ROUND_SIZE( base, size ) >> page_shift;
 421     while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
 422     return TRUE;
 423 }
 424
 425
 426 /***********************************************************************
 427  *           VIRTUAL_Init
 428  */
 429 BOOL32 VIRTUAL_Init(void)
 430 {
 431 #ifndef __i386__
 432     DWORD page_size;
 433
 434 # ifdef HAVE_GETPAGESIZE
 435     page_size = getpagesize();
 436 # else
 437 #  ifdef __svr4__
 438     page_size = sysconf(_SC_PAGESIZE);
 439 #  else
 440 #   error Cannot get the page size on this platform
 441 #  endif
 442 # endif
 443     page_mask = page_size - 1;
 444     granularity_mask = 0xffff;  /* hard-coded for now */
 445     /* Make sure we have a power of 2 */
 446     assert( !(page_size & page_mask) );
 447     page_shift = 0;
 448     while ((1 << page_shift) != page_size) page_shift++;
 449 #endif  /* !__i386__ */
 450
 451 #ifdef linux
 452     {
 453         /* Do not use stdio here since it may temporarily change the size
 454          * of some segments (ie libc6 adds 0x1000 per open FILE)
 455          */
 456         int fd = open ("/proc/self/maps", O_RDONLY);
 457         if (fd >= 0)
 458         {
 459             char buffer[512]; /* line might be rather long in 2.1 */
 460
 461             for (;;)
 462             {
 463                 int start, end, offset;
 464                 char r, w, x, p;
 465                 BYTE vprot = VPROT_COMMITTED;
 466
 467                 char * ptr = buffer;
 468                 int count = sizeof(buffer);
 469                 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
 470                     ptr++;
 471
 472                 if (*ptr != '\n') break;
 473                 *ptr = '\0';
 474
 475                 sscanf( buffer, "%x-%x %c%c%c%c %x",
 476                         &start, &end, &r, &w, &x, &p, &offset );
 477                 if (r == 'r') vprot |= VPROT_READ;
 478                 if (w == 'w') vprot |= VPROT_WRITE;
 479                 if (x == 'x') vprot |= VPROT_EXEC;
 480                 if (p == 'p') vprot |= VPROT_WRITECOPY;
 481                 VIRTUAL_CreateView( start, end - start, 0,
 482                                     VFLAG_SYSTEM, vprot, NULL );
 483             }
 484             close (fd);
 485         }
 486     }
 487 #endif  /* linux */
 488     return TRUE;
 489 }
 490
 491
 492 /***********************************************************************
 493  *           VIRTUAL_GetPageSize
 494  */
 495 DWORD VIRTUAL_GetPageSize(void)
 496 {
 497     return 1 << page_shift;
 498 }
 499
 500
 501 /***********************************************************************
 502  *           VIRTUAL_GetGranularity
 503  */
 504 DWORD VIRTUAL_GetGranularity(void)
 505 {
 506     return granularity_mask + 1;
 507 }
 508
 509
 510 /***********************************************************************
 511  *           VIRTUAL_SetFaultHandler
 512  */
 513 BOOL32 VIRTUAL_SetFaultHandler( LPVOID addr, HANDLERPROC proc, LPVOID arg )
 514 {
 515     FILE_VIEW *view;
 516
 517     if (!(view = VIRTUAL_FindView((UINT32)addr))) return FALSE;
 518     view->handlerProc = proc;
 519     view->handlerArg  = arg;
 520     return TRUE;
 521 }
 522
 523 /***********************************************************************
 524  *           VIRTUAL_HandleFault
 525  */
 526 BOOL32 VIRTUAL_HandleFault(LPVOID addr)
 527 {
 528     FILE_VIEW *view = VIRTUAL_FindView((UINT32)addr);
 529
 530     if (view && view->handlerProc)
 531         return view->handlerProc(view->handlerArg, addr);
 532     return FALSE;
 533 }
 534
 535
 536 /***********************************************************************
 537  *             VirtualAlloc   (KERNEL32.548)
 538  * Reserves or commits a region of pages in virtual address space
 539  *
 540  * RETURNS
 541  *      Base address of allocated region of pages
 542  *      NULL: Failure
 543  */
 544 LPVOID WINAPI VirtualAlloc(
 545               LPVOID addr,  /* [in] Address of region to reserve or commit */
 546               DWORD size,   /* [in] Size of region */
 547               DWORD type,   /* [in] Type of allocation */
 548               DWORD protect /* [in] Type of access protection */
 549 ) {
 550     FILE_VIEW *view;
 551     UINT32 base, ptr, view_size;
 552     BYTE vprot;
 553
 554     TRACE(virtual, "%08x %08lx %lx %08lx\n",
 555                      (UINT32)addr, size, type, protect );
 556
 557     /* Round parameters to a page boundary */
 558
 559     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 560     {
 561         SetLastError( ERROR_OUTOFMEMORY );
 562         return NULL;
 563     }
 564     if (addr)
 565     {
 566         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 567             base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
 568         else
 569             base = ROUND_ADDR( addr );
 570         size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
 571         if (base + size < base)  /* Disallow wrap-around */
 572         {
 573             SetLastError( ERROR_INVALID_PARAMETER );
 574             return NULL;
 575         }
 576     }
 577     else
 578     {
 579         base = 0;
 580         size = (size + page_mask) & ~page_mask;
 581     }
 582
 583     if (type & MEM_TOP_DOWN) {
 584         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 585          *        Is there _ANY_ way to do it with UNIX mmap()?
 586          */
 587         WARN(virtual,"MEM_TOP_DOWN ignored\n");
 588         type &= ~MEM_TOP_DOWN;
 589     }
 590     /* Compute the protection flags */
 591
 592     if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
 593         (type & ~(MEM_COMMIT | MEM_RESERVE)))
 594     {
 595         SetLastError( ERROR_INVALID_PARAMETER );
 596         return NULL;
 597     }
 598     if (type & MEM_COMMIT)
 599         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 600     else vprot = 0;
 601
 602     /* Reserve the memory */
 603
 604     if ((type & MEM_RESERVE) || !base)
 605     {
 606         view_size = size + (base ? 0 : granularity_mask + 1);
 607         ptr = (UINT32)FILE_dommap( NULL, (LPVOID)base, 0, view_size, 0, 0,
 608                                    VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 609         if (ptr == (UINT32)-1)
 610         {
 611             SetLastError( ERROR_OUTOFMEMORY );
 612             return NULL;
 613         }
 614         if (!base)
 615         {
 616             /* Release the extra memory while keeping the range */
 617             /* starting on a 64k boundary. */
 618
 619             if (ptr & granularity_mask)
 620             {
 621                 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
 622                 FILE_munmap( (void *)ptr, 0, extra );
 623                 ptr += extra;
 624                 view_size -= extra;
 625             }
 626             if (view_size > size)
 627                 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
 628         }
 629         else if (ptr != base)
 630         {
 631             /* We couldn't get the address we wanted */
 632             FILE_munmap( (void *)ptr, 0, view_size );
 633             SetLastError( ERROR_INVALID_ADDRESS );
 634             return NULL;
 635         }
 636         if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
 637         {
 638             FILE_munmap( (void *)ptr, 0, size );
 639             SetLastError( ERROR_OUTOFMEMORY );
 640             return NULL;
 641         }
 642         VIRTUAL_DEBUG_DUMP_VIEW( view );
 643         return (LPVOID)ptr;
 644     }
 645
 646     /* Commit the pages */
 647
 648     if (!(view = VIRTUAL_FindView( base )) ||
 649         (base + size > view->base + view->size))
 650     {
 651         SetLastError( ERROR_INVALID_PARAMETER );
 652         return NULL;
 653     }
 654
 655     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 656     return (LPVOID)base;
 657 }
 658
 659
 660 /***********************************************************************
 661  *             VirtualFree   (KERNEL32.550)
 662  * Release or decommits a region of pages in virtual address space.
 663  *
 664  * RETURNS
 665  *      TRUE: Success
 666  *      FALSE: Failure
 667  */
 668 BOOL32 WINAPI VirtualFree(
 669               LPVOID addr, /* [in] Address of region of committed pages */
 670               DWORD size,  /* [in] Size of region */
 671               DWORD type   /* [in] Type of operation */
 672 ) {
 673     FILE_VIEW *view;
 674     UINT32 base;
 675
 676     TRACE(virtual, "%08x %08lx %lx\n",
 677                      (UINT32)addr, size, type );
 678
 679     /* Fix the parameters */
 680
 681     size = ROUND_SIZE( addr, size );
 682     base = ROUND_ADDR( addr );
 683
 684     if (!(view = VIRTUAL_FindView( base )) ||
 685         (base + size > view->base + view->size))
 686     {
 687         SetLastError( ERROR_INVALID_PARAMETER );
 688         return FALSE;
 689     }
 690
 691     /* Compute the protection flags */
 692
 693     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 694     {
 695         SetLastError( ERROR_INVALID_PARAMETER );
 696         return FALSE;
 697     }
 698
 699     /* Free the pages */
 700
 701     if (type == MEM_RELEASE)
 702     {
 703         if (size || (base != view->base))
 704         {
 705             SetLastError( ERROR_INVALID_PARAMETER );
 706             return FALSE;
 707         }
 708         VIRTUAL_DeleteView( view );
 709         return TRUE;
 710     }
 711
 712     /* Decommit the pages */
 713     return VIRTUAL_SetProt( view, base, size, 0 );
 714 }
 715
 716
 717 /***********************************************************************
 718  *             VirtualLock   (KERNEL32.551)
 719  * Locks the specified region of virtual address space
 720  *
 721  * NOTE
 722  *      Always returns TRUE
 723  *
 724  * RETURNS
 725  *      TRUE: Success
 726  *      FALSE: Failure
 727  */
 728 BOOL32 WINAPI VirtualLock(
 729               LPVOID addr, /* [in] Address of first byte of range to lock */
 730               DWORD size   /* [in] Number of bytes in range to lock */
 731 ) {
 732     return TRUE;
 733 }
 734
 735
 736 /***********************************************************************
 737  *             VirtualUnlock   (KERNEL32.556)
 738  * Unlocks a range of pages in the virtual address space
 739  *
 740  * NOTE
 741  *      Always returns TRUE
 742  *
 743  * RETURNS
 744  *      TRUE: Success
 745  *      FALSE: Failure
 746  */
 747 BOOL32 WINAPI VirtualUnlock(
 748               LPVOID addr, /* [in] Address of first byte of range */
 749               DWORD size   /* [in] Number of bytes in range */
 750 ) {
 751     return TRUE;
 752 }
 753
 754
 755 /***********************************************************************
 756  *             VirtualProtect   (KERNEL32.552)
 757  * Changes the access protection on a region of committed pages
 758  *
 759  * RETURNS
 760  *      TRUE: Success
 761  *      FALSE: Failure
 762  */
 763 BOOL32 WINAPI VirtualProtect(
 764               LPVOID addr,     /* [in] Address of region of committed pages */
 765               DWORD size,      /* [in] Size of region */
 766               DWORD new_prot,  /* [in] Desired access protection */
 767               LPDWORD old_prot /* [out] Address of variable to get old protection */
 768 ) {
 769     FILE_VIEW *view;
 770     UINT32 base, i;
 771     BYTE vprot, *p;
 772
 773     TRACE(virtual, "%08x %08lx %08lx\n",
 774                      (UINT32)addr, size, new_prot );
 775
 776     /* Fix the parameters */
 777
 778     size = ROUND_SIZE( addr, size );
 779     base = ROUND_ADDR( addr );
 780
 781     if (!(view = VIRTUAL_FindView( base )) ||
 782         (base + size > view->base + view->size))
 783     {
 784         SetLastError( ERROR_INVALID_PARAMETER );
 785         return FALSE;
 786     }
 787
 788     /* Make sure all the pages are committed */
 789
 790     p = view->prot + ((base - view->base) >> page_shift);
 791     for (i = size >> page_shift; i; i--, p++)
 792     {
 793         if (!(*p & VPROT_COMMITTED))
 794         {
 795             SetLastError( ERROR_INVALID_PARAMETER );
 796             return FALSE;
 797         }
 798     }
 799
 800     VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 801     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 802     return VIRTUAL_SetProt( view, base, size, vprot );
 803 }
 804
 805
 806 /***********************************************************************
 807  *             VirtualProtectEx   (KERNEL32.553)
 808  * Changes the access protection on a region of committed pages in the
 809  * virtual address space of a specified process
 810  *
 811  * RETURNS
 812  *      TRUE: Success
 813  *      FALSE: Failure
 814  */
 815 BOOL32 WINAPI VirtualProtectEx(
 816               HANDLE32 handle, /* [in]  Handle of process */
 817               LPVOID addr,     /* [in]  Address of region of committed pages */
 818               DWORD size,      /* [in]  Size of region */
 819               DWORD new_prot,  /* [in]  Desired access protection */
 820               LPDWORD old_prot /* [out] Address of variable to get old protection */
 821 ) {
 822     BOOL32 ret = FALSE;
 823
 824     PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_VM_OPERATION, NULL );
 825     if (pdb)
 826     {
 827         if (pdb == PROCESS_Current())
 828             ret = VirtualProtect( addr, size, new_prot, old_prot );
 829         else
 830             ERR(virtual,"Unsupported on other process\n");
 831         K32OBJ_DecCount( &pdb->header );
 832     }
 833     return ret;
 834 }
 835
 836
 837 /***********************************************************************
 838  *             VirtualQuery   (KERNEL32.554)
 839  * Provides info about a range of pages in virtual address space
 840  *
 841  * RETURNS
 842  *      Number of bytes returned in information buffer
 843  */
 844 DWORD WINAPI VirtualQuery(
 845              LPCVOID addr,                    /* [in]  Address of region */
 846              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 847              DWORD len                        /* [in]  Size of buffer */
 848 ) {
 849     FILE_VIEW *view = VIRTUAL_FirstView;
 850     UINT32 base = ROUND_ADDR( addr );
 851     UINT32 alloc_base = 0;
 852     UINT32 size = 0;
 853
 854     /* Find the view containing the address */
 855
 856     for (;;)
 857     {
 858         if (!view)
 859         {
 860             size = 0xffff0000 - alloc_base;
 861             break;
 862         }
 863         if (view->base > base)
 864         {
 865             size = view->base - alloc_base;
 866             view = NULL;
 867             break;
 868         }
 869         if (view->base + view->size > base)
 870         {
 871             alloc_base = view->base;
 872             size = view->size;
 873             break;
 874         }
 875         alloc_base = view->base + view->size;
 876         view = view->next;
 877     }
 878
 879     /* Fill the info structure */
 880
 881     if (!view)
 882     {
 883         info->State             = MEM_FREE;
 884         info->Protect           = 0;
 885         info->AllocationProtect = 0;
 886         info->Type              = 0;
 887     }
 888     else
 889     {
 890         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
 891         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
 892         for (size = base - alloc_base; size < view->size; size += page_mask+1)
 893             if (view->prot[size >> page_shift] != vprot) break;
 894         info->AllocationProtect = view->protect;
 895         info->Type              = MEM_PRIVATE;  /* FIXME */
 896     }
 897
 898     info->BaseAddress    = (LPVOID)base;
 899     info->AllocationBase = (LPVOID)alloc_base;
 900     info->RegionSize     = size - (base - alloc_base);
 901     return sizeof(*info);
 902 }
 903
 904
 905 /***********************************************************************
 906  *             VirtualQueryEx   (KERNEL32.555)
 907  * Provides info about a range of pages in virtual address space of a
 908  * specified process
 909  *
 910  * RETURNS
 911  *      Number of bytes returned in information buffer
 912  */
 913 DWORD WINAPI VirtualQueryEx(
 914              HANDLE32 handle,                 /* [in] Handle of process */
 915              LPCVOID addr,                    /* [in] Address of region */
 916              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 917              DWORD len                        /* [in] Size of buffer */
 918 ) {
 919     DWORD ret = len;
 920
 921     PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_QUERY_INFORMATION, NULL );
 922     if (pdb)
 923     {
 924         if (pdb == PROCESS_Current())
 925             ret = VirtualQuery( addr, info, len );
 926         else
 927             ERR(virtual,"Unsupported on other process\n");
 928         K32OBJ_DecCount( &pdb->header );
 929     }
 930     return ret;
 931 }
 932
 933
 934 /***********************************************************************
 935  *             IsBadReadPtr32   (KERNEL32.354)
 936  *
 937  * RETURNS
 938  *      FALSE: Process has read access to entire block
 939  *      TRUE: Otherwise
 940  */
 941 BOOL32 WINAPI IsBadReadPtr32(
 942               LPCVOID ptr, /* Address of memory block */
 943               UINT32 size  /* Size of block */
 944 ) {
 945     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 946                                 VPROT_READ | VPROT_COMMITTED );
 947 }
 948
 949
 950 /***********************************************************************
 951  *             IsBadWritePtr32   (KERNEL32.357)
 952  *
 953  * RETURNS
 954  *      FALSE: Process has write access to entire block
 955  *      TRUE: Otherwise
 956  */
 957 BOOL32 WINAPI IsBadWritePtr32(
 958               LPVOID ptr, /* [in] Address of memory block */
 959               UINT32 size /* [in] Size of block in bytes */
 960 ) {
 961     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 962                                 VPROT_WRITE | VPROT_COMMITTED );
 963 }
 964
 965
 966 /***********************************************************************
 967  *             IsBadHugeReadPtr32   (KERNEL32.352)
 968  * RETURNS
 969  *      FALSE: Process has read access to entire block
 970  *      TRUE: Otherwise
 971  */
 972 BOOL32 WINAPI IsBadHugeReadPtr32(
 973               LPCVOID ptr, /* [in] Address of memory block */
 974               UINT32 size  /* [in] Size of block */
 975 ) {
 976     return IsBadReadPtr32( ptr, size );
 977 }
 978
 979
 980 /***********************************************************************
 981  *             IsBadHugeWritePtr32   (KERNEL32.353)
 982  * RETURNS
 983  *      FALSE: Process has write access to entire block
 984  *      TRUE: Otherwise
 985  */
 986 BOOL32 WINAPI IsBadHugeWritePtr32(
 987               LPVOID ptr, /* [in] Address of memory block */
 988               UINT32 size /* [in] Size of block */
 989 ) {
 990     return IsBadWritePtr32( ptr, size );
 991 }
 992
 993
 994 /***********************************************************************
 995  *             IsBadCodePtr32   (KERNEL32.351)
 996  *
 997  * RETURNS
 998  *      FALSE: Process has read access to specified memory
 999  *      TRUE: Otherwise
1000  */
1001 BOOL32 WINAPI IsBadCodePtr32(
1002               FARPROC32 ptr /* [in] Address of function */
1003 ) {
1004     return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
1005 }
1006
1007
1008 /***********************************************************************
1009  *             IsBadStringPtr32A   (KERNEL32.355)
1010  *
1011  * RETURNS
1012  *      FALSE: Read access to all bytes in string
1013  *      TRUE: Else
1014  */
1015 BOOL32 WINAPI IsBadStringPtr32A(
1016               LPCSTR str, /* [in] Address of string */
1017               UINT32 max  /* [in] Maximum size of string */
1018 ) {
1019     FILE_VIEW *view;
1020     UINT32 page, count;
1021
1022     if (!max) return FALSE;
1023     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1024     page  = ((UINT32)str - view->base) >> page_shift;
1025     count = page_mask + 1 - ((UINT32)str & page_mask);
1026
1027     while (max)
1028     {
1029         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1030                                                 (VPROT_READ | VPROT_COMMITTED))
1031             return TRUE;
1032         if (count > max) count = max;
1033         max -= count;
1034         while (count--) if (!*str++) return FALSE;
1035         if (++page >= view->size >> page_shift) return TRUE;
1036         count = page_mask + 1;
1037     }
1038     return FALSE;
1039 }
1040
1041
1042 /***********************************************************************
1043  *             IsBadStringPtr32W   (KERNEL32.356)
1044  * See IsBadStringPtr32A
1045  */
1046 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
1047 {
1048     FILE_VIEW *view;
1049     UINT32 page, count;
1050
1051     if (!max) return FALSE;
1052     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1053     page  = ((UINT32)str - view->base) >> page_shift;
1054     count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
1055
1056     while (max)
1057     {
1058         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1059                                                 (VPROT_READ | VPROT_COMMITTED))
1060             return TRUE;
1061         if (count > max) count = max;
1062         max -= count;
1063         while (count--) if (!*str++) return FALSE;
1064         if (++page >= view->size >> page_shift) return TRUE;
1065         count = (page_mask + 1) / sizeof(WCHAR);
1066     }
1067     return FALSE;
1068 }
1069
1070
1071 /***********************************************************************
1072  *             CreateFileMapping32A   (KERNEL32.46)
1073  * Creates a named or unnamed file-mapping object for the specified file
1074  *
1075  * RETURNS
1076  *      Handle: Success
1077  *      0: Mapping object does not exist
1078  *      NULL: Failure
1079  */
1080 HANDLE32 WINAPI CreateFileMapping32A(
1081                 HFILE32 hFile,   /* [in] Handle of file to map */
1082                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1083                 DWORD protect,   /* [in] Protection for mapping object */
1084                 DWORD size_high, /* [in] High-order 32 bits of object size */
1085                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1086                 LPCSTR name      /* [in] Name of file-mapping object */ )
1087 {
1088     FILE_MAPPING *mapping = NULL;
1089     HANDLE32 handle;
1090     BYTE vprot;
1091     BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1092
1093     /* First search for an object with the same name */
1094
1095     K32OBJ *obj = K32OBJ_FindName( name );
1096
1097     SetLastError(0); /* Win95 does that for some functions, like CFM */
1098     if (obj)
1099     {
1100         if (obj->type == K32OBJ_MEM_MAPPED_FILE)
1101         {
1102             SetLastError( ERROR_ALREADY_EXISTS );
1103             handle = HANDLE_Alloc( PROCESS_Current(), obj,
1104                                    FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, -1 );
1105         }
1106         else
1107         {
1108             SetLastError( ERROR_DUP_NAME );
1109             handle = 0;
1110         }
1111         K32OBJ_DecCount( obj );
1112         return handle;
1113     }
1114
1115     /* Check parameters */
1116
1117     TRACE(virtual,"(%x,%p,%08lx,%08lx%08lx,%s)\n",
1118           hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1119
1120     vprot = VIRTUAL_GetProt( protect );
1121     if (protect & SEC_RESERVE)
1122     {
1123         if (hFile != INVALID_HANDLE_VALUE32)
1124         {
1125             SetLastError( ERROR_INVALID_PARAMETER );
1126             return 0;
1127         }
1128     }
1129     else vprot |= VPROT_COMMITTED;
1130     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1131
1132     /* Compute the size and extend the file if necessary */
1133
1134     if (hFile == INVALID_HANDLE_VALUE32)
1135     {
1136         FIXME(virtual,"shared anon mapping (%s, size %d) not correctly supported!\n",debugstr_a(name),size_low);
1137         if (!size_high && !size_low)
1138         {
1139             SetLastError( ERROR_INVALID_PARAMETER );
1140             return 0;
1141         }
1142         obj = NULL;
1143         if (name)
1144         {
1145             CHAR        buf[260];
1146
1147             GetTempPath32A(260,buf);
1148             GetTempFileName32A(buf,"wine",0,buf);
1149             hFile = CreateFile32A(buf,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_ALWAYS,0,0);
1150             /* FIXME: bad hack to avoid lots of leftover tempfiles */
1151             DeleteFile32A(buf);
1152             if (hFile == INVALID_HANDLE_VALUE32)
1153                 FIXME(virtual,"could not create temp. file for anon shared mapping: reason was 0x%08lx\n",GetLastError());
1154         }
1155     }
1156     if (hFile != INVALID_HANDLE_VALUE32) /* We have a file */
1157     {
1158         BY_HANDLE_FILE_INFORMATION info;
1159         DWORD access = GENERIC_READ;
1160
1161         if (((protect & 0xff) == PAGE_READWRITE) ||
1162             ((protect & 0xff) == PAGE_WRITECOPY) ||
1163             ((protect & 0xff) == PAGE_EXECUTE_READWRITE) ||
1164             ((protect & 0xff) == PAGE_EXECUTE_WRITECOPY))
1165                 access |= GENERIC_WRITE;
1166         if (!(obj = HANDLE_GetObjPtr( PROCESS_Current(), hFile,
1167                                       K32OBJ_FILE, access, NULL )))
1168             goto error;
1169
1170         if (!GetFileInformationByHandle( hFile, &info )) goto error;
1171         if (!size_high && !size_low)
1172         {
1173             size_high = info.nFileSizeHigh;
1174             size_low  = info.nFileSizeLow;
1175         }
1176         else if ((size_high > info.nFileSizeHigh) ||
1177                  ((size_high == info.nFileSizeHigh) &&
1178                   (size_low > info.nFileSizeLow)))
1179         {
1180             /* We have to grow the file */
1181             if (SetFilePointer( hFile, size_low, &size_high,
1182                                 FILE_BEGIN ) == 0xffffffff) goto error;
1183             if (!SetEndOfFile( hFile )) goto error;
1184         }
1185     }
1186
1187     /* Allocate the mapping object */
1188
1189     if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
1190     mapping->header.type     = K32OBJ_MEM_MAPPED_FILE;
1191     mapping->header.refcount = 1;
1192     mapping->protect         = vprot;
1193     mapping->size_high       = size_high;
1194     mapping->size_low        = ROUND_SIZE( 0, size_low );
1195     mapping->file            = (FILE_OBJECT *)obj;
1196
1197     if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
1198     else handle = HANDLE_Alloc( PROCESS_Current(), &mapping->header,
1199                                 FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, -1 );
1200     K32OBJ_DecCount( &mapping->header );
1201     return handle;
1202
1203 error:
1204     if (obj) K32OBJ_DecCount( obj );
1205     if (mapping) HeapFree( SystemHeap, 0, mapping );
1206     return 0;
1207 }
1208
1209
1210 /***********************************************************************
1211  *             CreateFileMapping32W   (KERNEL32.47)
1212  * See CreateFileMapping32A
1213  */
1214 HANDLE32 WINAPI CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
1215                                       DWORD protect, DWORD size_high,
1216                                       DWORD size_low, LPCWSTR name )
1217 {
1218     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1219     HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
1220                                          size_high, size_low, nameA );
1221     HeapFree( GetProcessHeap(), 0, nameA );
1222     return ret;
1223 }
1224
1225
1226 /***********************************************************************
1227  *             OpenFileMapping32A   (KERNEL32.397)
1228  * Opens a named file-mapping object.
1229  *
1230  * RETURNS
1231  *      Handle: Success
1232  *      NULL: Failure
1233  */
1234 HANDLE32 WINAPI OpenFileMapping32A(
1235                 DWORD access,   /* [in] Access mode */
1236                 BOOL32 inherit, /* [in] Inherit flag */
1237                 LPCSTR name     /* [in] Name of file-mapping object */
1238 ) {
1239     HANDLE32 handle = 0;
1240     K32OBJ *obj;
1241     SYSTEM_LOCK();
1242     if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
1243     {
1244         handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, -1 );
1245         K32OBJ_DecCount( obj );
1246     }
1247     SYSTEM_UNLOCK();
1248     return handle;
1249 }
1250
1251
1252 /***********************************************************************
1253  *             OpenFileMapping32W   (KERNEL32.398)
1254  * See OpenFileMapping32A
1255  */
1256 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1257 {
1258     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1259     HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1260     HeapFree( GetProcessHeap(), 0, nameA );
1261     return ret;
1262 }
1263
1264
1265 /***********************************************************************
1266  *           VIRTUAL_DestroyMapping
1267  *
1268  * Destroy a FILE_MAPPING object.
1269  */
1270 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1271 {
1272     FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1273     assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1274
1275     if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
1276     ptr->type = K32OBJ_UNKNOWN;
1277     HeapFree( SystemHeap, 0, mapping );
1278 }
1279
1280
1281 /***********************************************************************
1282  *             MapViewOfFile   (KERNEL32.385)
1283  * Maps a view of a file into the address space
1284  *
1285  * RETURNS
1286  *      Starting address of mapped view
1287  *      NULL: Failure
1288  */
1289 LPVOID WINAPI MapViewOfFile(
1290               HANDLE32 mapping,  /* [in] File-mapping object to map */
1291               DWORD access,      /* [in] Access mode */
1292               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1293               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1294               DWORD count        /* [in] Number of bytes to map */
1295 ) {
1296     return MapViewOfFileEx( mapping, access, offset_high,
1297                             offset_low, count, NULL );
1298 }
1299
1300
1301 /***********************************************************************
1302  *             MapViewOfFileEx   (KERNEL32.386)
1303  * Maps a view of a file into the address space
1304  *
1305  * RETURNS
1306  *      Starting address of mapped view
1307  *      NULL: Failure
1308  */
1309 LPVOID WINAPI MapViewOfFileEx(
1310               HANDLE32 handle,   /* [in] File-mapping object to map */
1311               DWORD access,      /* [in] Access mode */
1312               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1313               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1314               DWORD count,       /* [in] Number of bytes to map */
1315               LPVOID addr        /* [in] Suggested starting address for mapped view */
1316 ) {
1317     FILE_MAPPING *mapping;
1318     FILE_VIEW *view;
1319     UINT32 ptr = (UINT32)-1, size = 0;
1320     int flags = MAP_PRIVATE;
1321
1322     /* Check parameters */
1323
1324     if ((offset_low & granularity_mask) ||
1325         (addr && ((UINT32)addr & granularity_mask)))
1326     {
1327         SetLastError( ERROR_INVALID_PARAMETER );
1328         return NULL;
1329     }
1330
1331     if (!(mapping = (FILE_MAPPING *)HANDLE_GetObjPtr( PROCESS_Current(),
1332                                                       handle,
1333                                                       K32OBJ_MEM_MAPPED_FILE,
1334                                                       0  /* FIXME */, NULL )))
1335         return NULL;
1336
1337     if (mapping->size_high || offset_high)
1338         ERR(virtual, "Offsets larger than 4Gb not supported\n");
1339
1340     if ((offset_low >= mapping->size_low) ||
1341         (count > mapping->size_low - offset_low))
1342     {
1343         SetLastError( ERROR_INVALID_PARAMETER );
1344         goto error;
1345     }
1346     if (count) size = ROUND_SIZE( offset_low, count );
1347     else size = mapping->size_low - offset_low;
1348
1349     switch(access)
1350     {
1351     case FILE_MAP_ALL_ACCESS:
1352     case FILE_MAP_WRITE:
1353     case FILE_MAP_WRITE | FILE_MAP_READ:
1354         if (!(mapping->protect & VPROT_WRITE))
1355         {
1356             SetLastError( ERROR_INVALID_PARAMETER );
1357             goto error;
1358         }
1359         flags = MAP_SHARED;
1360         /* fall through */
1361     case FILE_MAP_READ:
1362     case FILE_MAP_COPY:
1363     case FILE_MAP_COPY | FILE_MAP_READ:
1364         if (mapping->protect & VPROT_READ) break;
1365         /* fall through */
1366     default:
1367         SetLastError( ERROR_INVALID_PARAMETER );
1368         goto error;
1369     }
1370
1371     /* Map the file */
1372
1373     TRACE(virtual, "handle=%x size=%x offset=%lx\n",
1374                      handle, size, offset_low );
1375
1376     ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low,
1377                                VIRTUAL_GetUnixProt( mapping->protect ),
1378                                flags );
1379     if (ptr == (UINT32)-1) {
1380         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1381          * Platform Differences":
1382          * Windows NT: ERROR_INVALID_PARAMETER
1383          * Windows 95: ERROR_INVALID_ADDRESS.
1384          * FIXME: So should we add a module dependend check here? -MM
1385          */
1386         if (errno==ENOMEM)
1387             SetLastError( ERROR_OUTOFMEMORY );
1388         else
1389             SetLastError( ERROR_INVALID_PARAMETER );
1390         goto error;
1391     }
1392
1393     if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1394                                      mapping->protect, mapping )))
1395     {
1396         SetLastError( ERROR_OUTOFMEMORY );
1397         goto error;
1398     }
1399     return (LPVOID)ptr;
1400
1401 error:
1402     if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1403     K32OBJ_DecCount( &mapping->header );
1404     return NULL;
1405 }
1406
1407
1408 /***********************************************************************
1409  *             FlushViewOfFile   (KERNEL32.262)
1410  * Writes to the disk a byte range within a mapped view of a file
1411  *
1412  * RETURNS
1413  *      TRUE: Success
1414  *      FALSE: Failure
1415  */
1416 BOOL32 WINAPI FlushViewOfFile(
1417               LPCVOID base, /* [in] Start address of byte range to flush */
1418               DWORD cbFlush /* [in] Number of bytes in range */
1419 ) {
1420     FILE_VIEW *view;
1421     UINT32 addr = ROUND_ADDR( base );
1422
1423     TRACE(virtual, "FlushViewOfFile at %p for %ld bytes\n",
1424                      base, cbFlush );
1425
1426     if (!(view = VIRTUAL_FindView( addr )))
1427     {
1428         SetLastError( ERROR_INVALID_PARAMETER );
1429         return FALSE;
1430     }
1431     if (!cbFlush) cbFlush = view->size;
1432     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1433     SetLastError( ERROR_INVALID_PARAMETER );
1434     return FALSE;
1435 }
1436
1437
1438 /***********************************************************************
1439  *             UnmapViewOfFile   (KERNEL32.540)
1440  * Unmaps a mapped view of a file.
1441  *
1442  * NOTES
1443  *      Should addr be an LPCVOID?
1444  *
1445  * RETURNS
1446  *      TRUE: Success
1447  *      FALSE: Failure
1448  */
1449 BOOL32 WINAPI UnmapViewOfFile(
1450               LPVOID addr /* [in] Address where mapped view begins */
1451 ) {
1452     FILE_VIEW *view;
1453     UINT32 base = ROUND_ADDR( addr );
1454     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1455     {
1456         SetLastError( ERROR_INVALID_PARAMETER );
1457         return FALSE;
1458     }
1459     VIRTUAL_DeleteView( view );
1460     return TRUE;
1461 }
1462
1463 /***********************************************************************
1464  *             VIRTUAL_MapFileW
1465  *
1466  * Helper function to map a file to memory:
1467  *  name                        -       file name
1468  *  [RETURN] ptr                -       pointer to mapped file
1469  */
1470 LPVOID VIRTUAL_MapFileW( LPCWSTR name )
1471 {
1472     HANDLE32 hFile, hMapping;
1473     LPVOID ptr = NULL;
1474
1475     hFile = CreateFile32W( name, GENERIC_READ, FILE_SHARE_READ, NULL,
1476                            OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
1477     if (hFile != INVALID_HANDLE_VALUE32)
1478     {
1479         hMapping = CreateFileMapping32A( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
1480         CloseHandle( hFile );
1481         if (hMapping)
1482         {
1483             ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
1484             CloseHandle( hMapping );
1485         }
1486     }
1487     return ptr;
1488 }