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 "server.h"
  24 #include "debug.h"
  25
  26 #ifndef MS_SYNC
  27 #define MS_SYNC 0
  28 #endif
  29
  30 /* File mapping */
  31 typedef struct
  32 {
  33     K32OBJ        header;
  34     K32OBJ       *file;
  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     HANDLE32      mapping;     /* Handle to the file mapping */
  47     HANDLERPROC   handlerProc; /* Fault handler */
  48     LPVOID        handlerArg;  /* Fault handler argument */
  49     BYTE          protect;     /* Protection for all pages at allocation time */
  50     BYTE          prot[1];     /* Protection byte for each page */
  51 } FILE_VIEW;
  52
  53 /* Per-view flags */
  54 #define VFLAG_SYSTEM     0x01
  55
  56 /* Conversion from VPROT_* to Win32 flags */
  57 static const BYTE VIRTUAL_Win32Flags[16] =
  58 {
  59     PAGE_NOACCESS,              /* 0 */
  60     PAGE_READONLY,              /* READ */
  61     PAGE_READWRITE,             /* WRITE */
  62     PAGE_READWRITE,             /* READ | WRITE */
  63     PAGE_EXECUTE,               /* EXEC */
  64     PAGE_EXECUTE_READ,          /* READ | EXEC */
  65     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  66     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  67     PAGE_WRITECOPY,             /* WRITECOPY */
  68     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  69     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  70     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  71     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  72     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  73     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  74     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  75 };
  76
  77
  78 static FILE_VIEW *VIRTUAL_FirstView;
  79
  80 #ifdef __i386__
  81 /* These are always the same on an i386, and it will be faster this way */
  82 # define page_mask  0xfff
  83 # define page_shift 12
  84 # define granularity_mask 0xffff
  85 #else
  86 static UINT32 page_shift;
  87 static UINT32 page_mask;
  88 static UINT32 granularity_mask;  /* Allocation granularity (usually 64k) */
  89 #endif  /* __i386__ */
  90
  91 #define ROUND_ADDR(addr) \
  92    ((UINT32)(addr) & ~page_mask)
  93
  94 #define ROUND_SIZE(addr,size) \
  95    (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
  96
  97 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
  98
  99 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
 100 {
 101     VIRTUAL_DestroyMapping     /* destroy */
 102 };
 103
 104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 105    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 106
 107 /***********************************************************************
 108  *           VIRTUAL_GetProtStr
 109  */
 110 static const char *VIRTUAL_GetProtStr( BYTE prot )
 111 {
 112     static char buffer[6];
 113     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 114     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 115     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 116     buffer[3] = (prot & VPROT_WRITE) ?
 117                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 118     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 119     buffer[5] = 0;
 120     return buffer;
 121 }
 122
 123
 124 /***********************************************************************
 125  *           VIRTUAL_DumpView
 126  */
 127 static void VIRTUAL_DumpView( FILE_VIEW *view )
 128 {
 129     UINT32 i, count;
 130     UINT32 addr = view->base;
 131     BYTE prot = view->prot[0];
 132
 133     DUMP( "View: %08x - %08x%s",
 134           view->base, view->base + view->size - 1,
 135           (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 136     if (view->mapping)
 137         DUMP( " %d @ %08x\n", view->mapping, view->offset );
 138     else
 139         DUMP( " (anonymous)\n");
 140
 141     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 142     {
 143         if (view->prot[i] == prot) continue;
 144         DUMP( "      %08x - %08x %s\n",
 145               addr, addr + (count << page_shift) - 1,
 146               VIRTUAL_GetProtStr(prot) );
 147         addr += (count << page_shift);
 148         prot = view->prot[i];
 149         count = 0;
 150     }
 151     if (count)
 152         DUMP( "      %08x - %08x %s\n",
 153               addr, addr + (count << page_shift) - 1,
 154               VIRTUAL_GetProtStr(prot) );
 155 }
 156
 157
 158 /***********************************************************************
 159  *           VIRTUAL_Dump
 160  */
 161 void VIRTUAL_Dump(void)
 162 {
 163     FILE_VIEW *view = VIRTUAL_FirstView;
 164     DUMP( "\nDump of all virtual memory views:\n\n" );
 165     while (view)
 166     {
 167         VIRTUAL_DumpView( view );
 168         view = view->next;
 169     }
 170 }
 171
 172
 173 /***********************************************************************
 174  *           VIRTUAL_FindView
 175  *
 176  * Find the view containing a given address.
 177  *
 178  * RETURNS
 179  *      View: Success
 180  *      NULL: Failure
 181  */
 182 static FILE_VIEW *VIRTUAL_FindView(
 183                   UINT32 addr /* [in] Address */
 184 ) {
 185     FILE_VIEW *view = VIRTUAL_FirstView;
 186     while (view)
 187     {
 188         if (view->base > addr) return NULL;
 189         if (view->base + view->size > addr) return view;
 190         view = view->next;
 191     }
 192     return NULL;
 193 }
 194
 195
 196 /***********************************************************************
 197  *           VIRTUAL_CreateView
 198  *
 199  * Create a new view and add it in the linked list.
 200  */
 201 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
 202                                       UINT32 flags, BYTE vprot,
 203                                       HANDLE32 mapping )
 204 {
 205     FILE_VIEW *view, *prev;
 206
 207     /* Create the view structure */
 208
 209     assert( !(base & page_mask) );
 210     assert( !(size & page_mask) );
 211     size >>= page_shift;
 212     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 213     view->base    = base;
 214     view->size    = size << page_shift;
 215     view->flags   = flags;
 216     view->offset  = offset;
 217     view->mapping = mapping;
 218     view->protect = vprot;
 219     memset( view->prot, vprot, size );
 220
 221     /* Duplicate the mapping handle */
 222
 223     if ((view->mapping != -1) &&
 224         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 225                           GetCurrentProcess(), &view->mapping,
 226                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 227     {
 228         free( view );
 229         return NULL;
 230     }
 231
 232     /* Insert it in the linked list */
 233
 234     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 235     {
 236         view->next = VIRTUAL_FirstView;
 237         view->prev = NULL;
 238         if (view->next) view->next->prev = view;
 239         VIRTUAL_FirstView = view;
 240     }
 241     else
 242     {
 243         prev = VIRTUAL_FirstView;
 244         while (prev->next && (prev->next->base < base)) prev = prev->next;
 245         view->next = prev->next;
 246         view->prev = prev;
 247         if (view->next) view->next->prev = view;
 248         prev->next  = view;
 249     }
 250     VIRTUAL_DEBUG_DUMP_VIEW( view );
 251     return view;
 252 }
 253
 254
 255 /***********************************************************************
 256  *           VIRTUAL_DeleteView
 257  * Deletes a view.
 258  *
 259  * RETURNS
 260  *      None
 261  */
 262 static void VIRTUAL_DeleteView(
 263             FILE_VIEW *view /* [in] View */
 264 ) {
 265     FILE_munmap( (void *)view->base, 0, view->size );
 266     if (view->next) view->next->prev = view->prev;
 267     if (view->prev) view->prev->next = view->next;
 268     else VIRTUAL_FirstView = view->next;
 269     if (view->mapping) CloseHandle( view->mapping );
 270     free( view );
 271 }
 272
 273
 274 /***********************************************************************
 275  *           VIRTUAL_GetUnixProt
 276  *
 277  * Convert page protections to protection for mmap/mprotect.
 278  */
 279 static int VIRTUAL_GetUnixProt( BYTE vprot )
 280 {
 281     int prot = 0;
 282     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 283     {
 284         if (vprot & VPROT_READ) prot |= PROT_READ;
 285         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 286         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 287     }
 288     return prot;
 289 }
 290
 291
 292 /***********************************************************************
 293  *           VIRTUAL_GetWin32Prot
 294  *
 295  * Convert page protections to Win32 flags.
 296  *
 297  * RETURNS
 298  *      None
 299  */
 300 static void VIRTUAL_GetWin32Prot(
 301             BYTE vprot,     /* [in] Page protection flags */
 302             DWORD *protect, /* [out] Location to store Win32 protection flags */
 303             DWORD *state    /* [out] Location to store mem state flag */
 304 ) {
 305     if (protect) {
 306         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 307 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 308         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 309
 310         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 311     }
 312
 313     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 314 }
 315
 316
 317 /***********************************************************************
 318  *           VIRTUAL_GetProt
 319  *
 320  * Build page protections from Win32 flags.
 321  *
 322  * RETURNS
 323  *      Value of page protection flags
 324  */
 325 static BYTE VIRTUAL_GetProt(
 326             DWORD protect  /* [in] Win32 protection flags */
 327 ) {
 328     BYTE vprot;
 329
 330     switch(protect & 0xff)
 331     {
 332     case PAGE_READONLY:
 333         vprot = VPROT_READ;
 334         break;
 335     case PAGE_READWRITE:
 336         vprot = VPROT_READ | VPROT_WRITE;
 337         break;
 338     case PAGE_WRITECOPY:
 339         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 340         break;
 341     case PAGE_EXECUTE:
 342         vprot = VPROT_EXEC;
 343         break;
 344     case PAGE_EXECUTE_READ:
 345         vprot = VPROT_EXEC | VPROT_READ;
 346         break;
 347     case PAGE_EXECUTE_READWRITE:
 348         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 349         break;
 350     case PAGE_EXECUTE_WRITECOPY:
 351         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 352         break;
 353     case PAGE_NOACCESS:
 354     default:
 355         vprot = 0;
 356         break;
 357     }
 358     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 359     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 360     return vprot;
 361 }
 362
 363
 364 /***********************************************************************
 365  *           VIRTUAL_SetProt
 366  *
 367  * Change the protection of a range of pages.
 368  *
 369  * RETURNS
 370  *      TRUE: Success
 371  *      FALSE: Failure
 372  */
 373 static BOOL32 VIRTUAL_SetProt(
 374               FILE_VIEW *view, /* [in] Pointer to view */
 375               UINT32 base,     /* [in] Starting address */
 376               UINT32 size,     /* [in] Size in bytes */
 377               BYTE vprot       /* [in] Protections to use */
 378 ) {
 379     TRACE(virtual, "%08x-%08x %s\n",
 380                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 381
 382     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 383         return FALSE;  /* FIXME: last error */
 384
 385     memset( view->prot + ((base - view->base) >> page_shift),
 386             vprot, size >> page_shift );
 387     VIRTUAL_DEBUG_DUMP_VIEW( view );
 388     return TRUE;
 389 }
 390
 391
 392 /***********************************************************************
 393  *             VIRTUAL_CheckFlags
 394  *
 395  * Check that all pages in a range have the given flags.
 396  *
 397  * RETURNS
 398  *      TRUE: They do
 399  *      FALSE: They do not
 400  */
 401 static BOOL32 VIRTUAL_CheckFlags(
 402               UINT32 base, /* [in] Starting address */
 403               UINT32 size, /* [in] Size in bytes */
 404               BYTE flags   /* [in] Flags to check for */
 405 ) {
 406     FILE_VIEW *view;
 407     UINT32 page;
 408
 409     if (!size) return TRUE;
 410     if (!(view = VIRTUAL_FindView( base ))) return FALSE;
 411     if (view->base + view->size < base + size) return FALSE;
 412     page = (base - view->base) >> page_shift;
 413     size = ROUND_SIZE( base, size ) >> page_shift;
 414     while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
 415     return TRUE;
 416 }
 417
 418
 419 /***********************************************************************
 420  *           VIRTUAL_Init
 421  */
 422 BOOL32 VIRTUAL_Init(void)
 423 {
 424 #ifndef __i386__
 425     DWORD page_size;
 426
 427 # ifdef HAVE_GETPAGESIZE
 428     page_size = getpagesize();
 429 # else
 430 #  ifdef __svr4__
 431     page_size = sysconf(_SC_PAGESIZE);
 432 #  else
 433 #   error Cannot get the page size on this platform
 434 #  endif
 435 # endif
 436     page_mask = page_size - 1;
 437     granularity_mask = 0xffff;  /* hard-coded for now */
 438     /* Make sure we have a power of 2 */
 439     assert( !(page_size & page_mask) );
 440     page_shift = 0;
 441     while ((1 << page_shift) != page_size) page_shift++;
 442 #endif  /* !__i386__ */
 443
 444 #ifdef linux
 445     {
 446         /* Do not use stdio here since it may temporarily change the size
 447          * of some segments (ie libc6 adds 0x1000 per open FILE)
 448          */
 449         int fd = open ("/proc/self/maps", O_RDONLY);
 450         if (fd >= 0)
 451         {
 452             char buffer[512]; /* line might be rather long in 2.1 */
 453
 454             for (;;)
 455             {
 456                 int start, end, offset;
 457                 char r, w, x, p;
 458                 BYTE vprot = VPROT_COMMITTED;
 459
 460                 char * ptr = buffer;
 461                 int count = sizeof(buffer);
 462                 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
 463                     ptr++;
 464
 465                 if (*ptr != '\n') break;
 466                 *ptr = '\0';
 467
 468                 sscanf( buffer, "%x-%x %c%c%c%c %x",
 469                         &start, &end, &r, &w, &x, &p, &offset );
 470                 if (r == 'r') vprot |= VPROT_READ;
 471                 if (w == 'w') vprot |= VPROT_WRITE;
 472                 if (x == 'x') vprot |= VPROT_EXEC;
 473                 if (p == 'p') vprot |= VPROT_WRITECOPY;
 474                 VIRTUAL_CreateView( start, end - start, 0,
 475                                     VFLAG_SYSTEM, vprot, -1 );
 476             }
 477             close (fd);
 478         }
 479     }
 480 #endif  /* linux */
 481     return TRUE;
 482 }
 483
 484
 485 /***********************************************************************
 486  *           VIRTUAL_GetPageSize
 487  */
 488 DWORD VIRTUAL_GetPageSize(void)
 489 {
 490     return 1 << page_shift;
 491 }
 492
 493
 494 /***********************************************************************
 495  *           VIRTUAL_GetGranularity
 496  */
 497 DWORD VIRTUAL_GetGranularity(void)
 498 {
 499     return granularity_mask + 1;
 500 }
 501
 502
 503 /***********************************************************************
 504  *           VIRTUAL_SetFaultHandler
 505  */
 506 BOOL32 VIRTUAL_SetFaultHandler( LPVOID addr, HANDLERPROC proc, LPVOID arg )
 507 {
 508     FILE_VIEW *view;
 509
 510     if (!(view = VIRTUAL_FindView((UINT32)addr))) return FALSE;
 511     view->handlerProc = proc;
 512     view->handlerArg  = arg;
 513     return TRUE;
 514 }
 515
 516 /***********************************************************************
 517  *           VIRTUAL_HandleFault
 518  */
 519 BOOL32 VIRTUAL_HandleFault(LPVOID addr)
 520 {
 521     FILE_VIEW *view = VIRTUAL_FindView((UINT32)addr);
 522
 523     if (view && view->handlerProc)
 524         return view->handlerProc(view->handlerArg, addr);
 525     return FALSE;
 526 }
 527
 528
 529 /***********************************************************************
 530  *             VirtualAlloc   (KERNEL32.548)
 531  * Reserves or commits a region of pages in virtual address space
 532  *
 533  * RETURNS
 534  *      Base address of allocated region of pages
 535  *      NULL: Failure
 536  */
 537 LPVOID WINAPI VirtualAlloc(
 538               LPVOID addr,  /* [in] Address of region to reserve or commit */
 539               DWORD size,   /* [in] Size of region */
 540               DWORD type,   /* [in] Type of allocation */
 541               DWORD protect /* [in] Type of access protection */
 542 ) {
 543     FILE_VIEW *view;
 544     UINT32 base, ptr, view_size;
 545     BYTE vprot;
 546
 547     TRACE(virtual, "%08x %08lx %lx %08lx\n",
 548                      (UINT32)addr, size, type, protect );
 549
 550     /* Round parameters to a page boundary */
 551
 552     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 553     {
 554         SetLastError( ERROR_OUTOFMEMORY );
 555         return NULL;
 556     }
 557     if (addr)
 558     {
 559         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 560             base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
 561         else
 562             base = ROUND_ADDR( addr );
 563         size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
 564         if (base + size < base)  /* Disallow wrap-around */
 565         {
 566             SetLastError( ERROR_INVALID_PARAMETER );
 567             return NULL;
 568         }
 569     }
 570     else
 571     {
 572         base = 0;
 573         size = (size + page_mask) & ~page_mask;
 574     }
 575
 576     if (type & MEM_TOP_DOWN) {
 577         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 578          *        Is there _ANY_ way to do it with UNIX mmap()?
 579          */
 580         WARN(virtual,"MEM_TOP_DOWN ignored\n");
 581         type &= ~MEM_TOP_DOWN;
 582     }
 583     /* Compute the protection flags */
 584
 585     if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
 586         (type & ~(MEM_COMMIT | MEM_RESERVE)))
 587     {
 588         SetLastError( ERROR_INVALID_PARAMETER );
 589         return NULL;
 590     }
 591     if (type & MEM_COMMIT)
 592         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 593     else vprot = 0;
 594
 595     /* Reserve the memory */
 596
 597     if ((type & MEM_RESERVE) || !base)
 598     {
 599         view_size = size + (base ? 0 : granularity_mask + 1);
 600         ptr = (UINT32)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
 601                                    VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 602         if (ptr == (UINT32)-1)
 603         {
 604             SetLastError( ERROR_OUTOFMEMORY );
 605             return NULL;
 606         }
 607         if (!base)
 608         {
 609             /* Release the extra memory while keeping the range */
 610             /* starting on a 64k boundary. */
 611
 612             if (ptr & granularity_mask)
 613             {
 614                 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
 615                 FILE_munmap( (void *)ptr, 0, extra );
 616                 ptr += extra;
 617                 view_size -= extra;
 618             }
 619             if (view_size > size)
 620                 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
 621         }
 622         else if (ptr != base)
 623         {
 624             /* We couldn't get the address we wanted */
 625             FILE_munmap( (void *)ptr, 0, view_size );
 626             SetLastError( ERROR_INVALID_ADDRESS );
 627             return NULL;
 628         }
 629         if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, -1 )))
 630         {
 631             FILE_munmap( (void *)ptr, 0, size );
 632             SetLastError( ERROR_OUTOFMEMORY );
 633             return NULL;
 634         }
 635         VIRTUAL_DEBUG_DUMP_VIEW( view );
 636         return (LPVOID)ptr;
 637     }
 638
 639     /* Commit the pages */
 640
 641     if (!(view = VIRTUAL_FindView( base )) ||
 642         (base + size > view->base + view->size))
 643     {
 644         SetLastError( ERROR_INVALID_PARAMETER );
 645         return NULL;
 646     }
 647
 648     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 649     return (LPVOID)base;
 650 }
 651
 652
 653 /***********************************************************************
 654  *             VirtualFree   (KERNEL32.550)
 655  * Release or decommits a region of pages in virtual address space.
 656  *
 657  * RETURNS
 658  *      TRUE: Success
 659  *      FALSE: Failure
 660  */
 661 BOOL32 WINAPI VirtualFree(
 662               LPVOID addr, /* [in] Address of region of committed pages */
 663               DWORD size,  /* [in] Size of region */
 664               DWORD type   /* [in] Type of operation */
 665 ) {
 666     FILE_VIEW *view;
 667     UINT32 base;
 668
 669     TRACE(virtual, "%08x %08lx %lx\n",
 670                      (UINT32)addr, size, type );
 671
 672     /* Fix the parameters */
 673
 674     size = ROUND_SIZE( addr, size );
 675     base = ROUND_ADDR( addr );
 676
 677     if (!(view = VIRTUAL_FindView( base )) ||
 678         (base + size > view->base + view->size))
 679     {
 680         SetLastError( ERROR_INVALID_PARAMETER );
 681         return FALSE;
 682     }
 683
 684     /* Compute the protection flags */
 685
 686     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 687     {
 688         SetLastError( ERROR_INVALID_PARAMETER );
 689         return FALSE;
 690     }
 691
 692     /* Free the pages */
 693
 694     if (type == MEM_RELEASE)
 695     {
 696         if (size || (base != view->base))
 697         {
 698             SetLastError( ERROR_INVALID_PARAMETER );
 699             return FALSE;
 700         }
 701         VIRTUAL_DeleteView( view );
 702         return TRUE;
 703     }
 704
 705     /* Decommit the pages */
 706     return VIRTUAL_SetProt( view, base, size, 0 );
 707 }
 708
 709
 710 /***********************************************************************
 711  *             VirtualLock   (KERNEL32.551)
 712  * Locks the specified region of virtual address space
 713  *
 714  * NOTE
 715  *      Always returns TRUE
 716  *
 717  * RETURNS
 718  *      TRUE: Success
 719  *      FALSE: Failure
 720  */
 721 BOOL32 WINAPI VirtualLock(
 722               LPVOID addr, /* [in] Address of first byte of range to lock */
 723               DWORD size   /* [in] Number of bytes in range to lock */
 724 ) {
 725     return TRUE;
 726 }
 727
 728
 729 /***********************************************************************
 730  *             VirtualUnlock   (KERNEL32.556)
 731  * Unlocks a range of pages in the virtual address space
 732  *
 733  * NOTE
 734  *      Always returns TRUE
 735  *
 736  * RETURNS
 737  *      TRUE: Success
 738  *      FALSE: Failure
 739  */
 740 BOOL32 WINAPI VirtualUnlock(
 741               LPVOID addr, /* [in] Address of first byte of range */
 742               DWORD size   /* [in] Number of bytes in range */
 743 ) {
 744     return TRUE;
 745 }
 746
 747
 748 /***********************************************************************
 749  *             VirtualProtect   (KERNEL32.552)
 750  * Changes the access protection on a region of committed pages
 751  *
 752  * RETURNS
 753  *      TRUE: Success
 754  *      FALSE: Failure
 755  */
 756 BOOL32 WINAPI VirtualProtect(
 757               LPVOID addr,     /* [in] Address of region of committed pages */
 758               DWORD size,      /* [in] Size of region */
 759               DWORD new_prot,  /* [in] Desired access protection */
 760               LPDWORD old_prot /* [out] Address of variable to get old protection */
 761 ) {
 762     FILE_VIEW *view;
 763     UINT32 base, i;
 764     BYTE vprot, *p;
 765
 766     TRACE(virtual, "%08x %08lx %08lx\n",
 767                      (UINT32)addr, size, new_prot );
 768
 769     /* Fix the parameters */
 770
 771     size = ROUND_SIZE( addr, size );
 772     base = ROUND_ADDR( addr );
 773
 774     if (!(view = VIRTUAL_FindView( base )) ||
 775         (base + size > view->base + view->size))
 776     {
 777         SetLastError( ERROR_INVALID_PARAMETER );
 778         return FALSE;
 779     }
 780
 781     /* Make sure all the pages are committed */
 782
 783     p = view->prot + ((base - view->base) >> page_shift);
 784     for (i = size >> page_shift; i; i--, p++)
 785     {
 786         if (!(*p & VPROT_COMMITTED))
 787         {
 788             SetLastError( ERROR_INVALID_PARAMETER );
 789             return FALSE;
 790         }
 791     }
 792
 793     VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 794     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 795     return VIRTUAL_SetProt( view, base, size, vprot );
 796 }
 797
 798
 799 /***********************************************************************
 800  *             VirtualProtectEx   (KERNEL32.553)
 801  * Changes the access protection on a region of committed pages in the
 802  * virtual address space of a specified process
 803  *
 804  * RETURNS
 805  *      TRUE: Success
 806  *      FALSE: Failure
 807  */
 808 BOOL32 WINAPI VirtualProtectEx(
 809               HANDLE32 handle, /* [in]  Handle of process */
 810               LPVOID addr,     /* [in]  Address of region of committed pages */
 811               DWORD size,      /* [in]  Size of region */
 812               DWORD new_prot,  /* [in]  Desired access protection */
 813               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
 814 {
 815     if (PROCESS_IsCurrent( handle ))
 816         return VirtualProtect( addr, size, new_prot, old_prot );
 817     ERR(virtual,"Unsupported on other process\n");
 818     return FALSE;
 819 }
 820
 821
 822 /***********************************************************************
 823  *             VirtualQuery   (KERNEL32.554)
 824  * Provides info about a range of pages in virtual address space
 825  *
 826  * RETURNS
 827  *      Number of bytes returned in information buffer
 828  */
 829 DWORD WINAPI VirtualQuery(
 830              LPCVOID addr,                    /* [in]  Address of region */
 831              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 832              DWORD len                        /* [in]  Size of buffer */
 833 ) {
 834     FILE_VIEW *view = VIRTUAL_FirstView;
 835     UINT32 base = ROUND_ADDR( addr );
 836     UINT32 alloc_base = 0;
 837     UINT32 size = 0;
 838
 839     /* Find the view containing the address */
 840
 841     for (;;)
 842     {
 843         if (!view)
 844         {
 845             size = 0xffff0000 - alloc_base;
 846             break;
 847         }
 848         if (view->base > base)
 849         {
 850             size = view->base - alloc_base;
 851             view = NULL;
 852             break;
 853         }
 854         if (view->base + view->size > base)
 855         {
 856             alloc_base = view->base;
 857             size = view->size;
 858             break;
 859         }
 860         alloc_base = view->base + view->size;
 861         view = view->next;
 862     }
 863
 864     /* Fill the info structure */
 865
 866     if (!view)
 867     {
 868         info->State             = MEM_FREE;
 869         info->Protect           = 0;
 870         info->AllocationProtect = 0;
 871         info->Type              = 0;
 872     }
 873     else
 874     {
 875         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
 876         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
 877         for (size = base - alloc_base; size < view->size; size += page_mask+1)
 878             if (view->prot[size >> page_shift] != vprot) break;
 879         info->AllocationProtect = view->protect;
 880         info->Type              = MEM_PRIVATE;  /* FIXME */
 881     }
 882
 883     info->BaseAddress    = (LPVOID)base;
 884     info->AllocationBase = (LPVOID)alloc_base;
 885     info->RegionSize     = size - (base - alloc_base);
 886     return sizeof(*info);
 887 }
 888
 889
 890 /***********************************************************************
 891  *             VirtualQueryEx   (KERNEL32.555)
 892  * Provides info about a range of pages in virtual address space of a
 893  * specified process
 894  *
 895  * RETURNS
 896  *      Number of bytes returned in information buffer
 897  */
 898 DWORD WINAPI VirtualQueryEx(
 899              HANDLE32 handle,                 /* [in] Handle of process */
 900              LPCVOID addr,                    /* [in] Address of region */
 901              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 902              DWORD len                        /* [in] Size of buffer */ )
 903 {
 904     if (PROCESS_IsCurrent( handle ))
 905         return VirtualQuery( addr, info, len );
 906     ERR(virtual,"Unsupported on other process\n");
 907     return 0;
 908 }
 909
 910
 911 /***********************************************************************
 912  *             IsBadReadPtr32   (KERNEL32.354)
 913  *
 914  * RETURNS
 915  *      FALSE: Process has read access to entire block
 916  *      TRUE: Otherwise
 917  */
 918 BOOL32 WINAPI IsBadReadPtr32(
 919               LPCVOID ptr, /* Address of memory block */
 920               UINT32 size  /* Size of block */
 921 ) {
 922     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 923                                 VPROT_READ | VPROT_COMMITTED );
 924 }
 925
 926
 927 /***********************************************************************
 928  *             IsBadWritePtr32   (KERNEL32.357)
 929  *
 930  * RETURNS
 931  *      FALSE: Process has write access to entire block
 932  *      TRUE: Otherwise
 933  */
 934 BOOL32 WINAPI IsBadWritePtr32(
 935               LPVOID ptr, /* [in] Address of memory block */
 936               UINT32 size /* [in] Size of block in bytes */
 937 ) {
 938     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 939                                 VPROT_WRITE | VPROT_COMMITTED );
 940 }
 941
 942
 943 /***********************************************************************
 944  *             IsBadHugeReadPtr32   (KERNEL32.352)
 945  * RETURNS
 946  *      FALSE: Process has read access to entire block
 947  *      TRUE: Otherwise
 948  */
 949 BOOL32 WINAPI IsBadHugeReadPtr32(
 950               LPCVOID ptr, /* [in] Address of memory block */
 951               UINT32 size  /* [in] Size of block */
 952 ) {
 953     return IsBadReadPtr32( ptr, size );
 954 }
 955
 956
 957 /***********************************************************************
 958  *             IsBadHugeWritePtr32   (KERNEL32.353)
 959  * RETURNS
 960  *      FALSE: Process has write access to entire block
 961  *      TRUE: Otherwise
 962  */
 963 BOOL32 WINAPI IsBadHugeWritePtr32(
 964               LPVOID ptr, /* [in] Address of memory block */
 965               UINT32 size /* [in] Size of block */
 966 ) {
 967     return IsBadWritePtr32( ptr, size );
 968 }
 969
 970
 971 /***********************************************************************
 972  *             IsBadCodePtr32   (KERNEL32.351)
 973  *
 974  * RETURNS
 975  *      FALSE: Process has read access to specified memory
 976  *      TRUE: Otherwise
 977  */
 978 BOOL32 WINAPI IsBadCodePtr32(
 979               FARPROC32 ptr /* [in] Address of function */
 980 ) {
 981     return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
 982 }
 983
 984
 985 /***********************************************************************
 986  *             IsBadStringPtr32A   (KERNEL32.355)
 987  *
 988  * RETURNS
 989  *      FALSE: Read access to all bytes in string
 990  *      TRUE: Else
 991  */
 992 BOOL32 WINAPI IsBadStringPtr32A(
 993               LPCSTR str, /* [in] Address of string */
 994               UINT32 max  /* [in] Maximum size of string */
 995 ) {
 996     FILE_VIEW *view;
 997     UINT32 page, count;
 998
 999     if (!max) return FALSE;
1000     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1001     page  = ((UINT32)str - view->base) >> page_shift;
1002     count = page_mask + 1 - ((UINT32)str & page_mask);
1003
1004     while (max)
1005     {
1006         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1007                                                 (VPROT_READ | VPROT_COMMITTED))
1008             return TRUE;
1009         if (count > max) count = max;
1010         max -= count;
1011         while (count--) if (!*str++) return FALSE;
1012         if (++page >= view->size >> page_shift) return TRUE;
1013         count = page_mask + 1;
1014     }
1015     return FALSE;
1016 }
1017
1018
1019 /***********************************************************************
1020  *             IsBadStringPtr32W   (KERNEL32.356)
1021  * See IsBadStringPtr32A
1022  */
1023 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
1024 {
1025     FILE_VIEW *view;
1026     UINT32 page, count;
1027
1028     if (!max) return FALSE;
1029     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1030     page  = ((UINT32)str - view->base) >> page_shift;
1031     count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
1032
1033     while (max)
1034     {
1035         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1036                                                 (VPROT_READ | VPROT_COMMITTED))
1037             return TRUE;
1038         if (count > max) count = max;
1039         max -= count;
1040         while (count--) if (!*str++) return FALSE;
1041         if (++page >= view->size >> page_shift) return TRUE;
1042         count = (page_mask + 1) / sizeof(WCHAR);
1043     }
1044     return FALSE;
1045 }
1046
1047
1048 /***********************************************************************
1049  *             CreateFileMapping32A   (KERNEL32.46)
1050  * Creates a named or unnamed file-mapping object for the specified file
1051  *
1052  * RETURNS
1053  *      Handle: Success
1054  *      0: Mapping object does not exist
1055  *      NULL: Failure
1056  */
1057 HANDLE32 WINAPI CreateFileMapping32A(
1058                 HFILE32 hFile,   /* [in] Handle of file to map */
1059                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1060                 DWORD protect,   /* [in] Protection for mapping object */
1061                 DWORD size_high, /* [in] High-order 32 bits of object size */
1062                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1063                 LPCSTR name      /* [in] Name of file-mapping object */ )
1064 {
1065     FILE_MAPPING *mapping = NULL;
1066     K32OBJ *file;
1067     struct create_mapping_request req;
1068     struct create_mapping_reply reply = { -1 };
1069     HANDLE32 handle;
1070     BYTE vprot;
1071     BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1072
1073     /* First search for an object with the same name */
1074
1075     K32OBJ *obj = K32OBJ_FindName( name );
1076
1077     if (obj)
1078     {
1079         if (obj->type == K32OBJ_MEM_MAPPED_FILE)
1080         {
1081             req.handle = -1;
1082             CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
1083                                 &req, sizeof(req),
1084                                 name, name ? strlen(name) + 1 : 0 );
1085             CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
1086             if (reply.handle == -1) return 0;
1087             if (GetLastError() != ERROR_ALREADY_EXISTS)
1088                 return 0;  /* not supposed to happen */
1089             handle = HANDLE_Alloc( PROCESS_Current(), obj,
1090                                    FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, reply.handle );
1091         }
1092         else
1093         {
1094             SetLastError( ERROR_DUP_NAME );
1095             handle = 0;
1096         }
1097         K32OBJ_DecCount( obj );
1098         return handle;
1099     }
1100
1101     /* Check parameters */
1102
1103     TRACE(virtual,"(%x,%p,%08lx,%08lx%08lx,%s)\n",
1104           hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1105
1106     vprot = VIRTUAL_GetProt( protect );
1107     if (protect & SEC_RESERVE)
1108     {
1109         if (hFile != INVALID_HANDLE_VALUE32)
1110         {
1111             SetLastError( ERROR_INVALID_PARAMETER );
1112             return 0;
1113         }
1114     }
1115     else vprot |= VPROT_COMMITTED;
1116     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1117
1118     /* Compute the size and extend the file if necessary */
1119
1120     if (hFile == INVALID_HANDLE_VALUE32)
1121     {
1122         if (!size_high && !size_low)
1123         {
1124             SetLastError( ERROR_INVALID_PARAMETER );
1125             return 0;
1126         }
1127         file = NULL;
1128         if (name)
1129         {
1130             CHAR        buf[260];
1131
1132             GetTempPath32A(260,buf);
1133             GetTempFileName32A(buf,"wine",0,buf);
1134             hFile = CreateFile32A(
1135                 buf,
1136                 GENERIC_READ|GENERIC_WRITE,
1137                 FILE_SHARE_READ|FILE_SHARE_WRITE,/* so we can reuse the tmpfn */
1138                 NULL,
1139                 OPEN_ALWAYS,
1140                 0,
1141                 0
1142             );
1143             /* FIXME: bad hack to avoid lots of leftover tempfiles */
1144             DeleteFile32A(buf);
1145             if (hFile == INVALID_HANDLE_VALUE32)
1146                 FIXME(virtual,"could not create temp. file for anon shared mapping: reason was 0x%08lx\n",GetLastError());
1147         }
1148     }
1149     if (hFile != INVALID_HANDLE_VALUE32) /* We have a file */
1150     {
1151         BY_HANDLE_FILE_INFORMATION info;
1152         DWORD access = GENERIC_READ;
1153
1154         if (((protect & 0xff) == PAGE_READWRITE) ||
1155             ((protect & 0xff) == PAGE_WRITECOPY) ||
1156             ((protect & 0xff) == PAGE_EXECUTE_READWRITE) ||
1157             ((protect & 0xff) == PAGE_EXECUTE_WRITECOPY))
1158                 access |= GENERIC_WRITE;
1159
1160         if (!(file = HANDLE_GetObjPtr( PROCESS_Current(), hFile, K32OBJ_FILE,
1161                                        access, &req.handle ))) goto error;
1162         if (!GetFileInformationByHandle( hFile, &info )) goto error;
1163         if (!size_high && !size_low)
1164         {
1165             size_high = info.nFileSizeHigh;
1166             size_low  = info.nFileSizeLow;
1167         }
1168         else if ((size_high > info.nFileSizeHigh) ||
1169                  ((size_high == info.nFileSizeHigh) &&
1170                   (size_low > info.nFileSizeLow)))
1171         {
1172             /* We have to grow the file */
1173             if (SetFilePointer( hFile, size_low, &size_high,
1174                                 FILE_BEGIN ) == 0xffffffff) goto error;
1175             if (!SetEndOfFile( hFile )) goto error;
1176         }
1177     }
1178     else req.handle = -1;
1179
1180     /* Create the server object */
1181
1182     req.size_high = size_high;
1183     req.size_low  = ROUND_SIZE( 0, size_low );
1184     req.protect   = vprot;
1185     CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
1186                         &req, sizeof(req),
1187                         name, name ? strlen(name) + 1 : 0 );
1188     if (CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL ))
1189         goto error;
1190
1191     /* Allocate the mapping object */
1192
1193     if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
1194     mapping->header.type     = K32OBJ_MEM_MAPPED_FILE;
1195     mapping->header.refcount = 1;
1196     mapping->file            = file;
1197
1198     if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
1199     else handle = HANDLE_Alloc( PROCESS_Current(), &mapping->header,
1200                                 FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, reply.handle );
1201     K32OBJ_DecCount( &mapping->header );
1202     SetLastError(0); /* Last error value is relevant. (see the start of fun) */
1203     return handle;
1204
1205 error:
1206     if (reply.handle != -1) CLIENT_CloseHandle( reply.handle );
1207     if (file) K32OBJ_DecCount( file );
1208     if (mapping) HeapFree( SystemHeap, 0, mapping );
1209     return 0;
1210 }
1211
1212
1213 /***********************************************************************
1214  *             CreateFileMapping32W   (KERNEL32.47)
1215  * See CreateFileMapping32A
1216  */
1217 HANDLE32 WINAPI CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
1218                                       DWORD protect, DWORD size_high,
1219                                       DWORD size_low, LPCWSTR name )
1220 {
1221     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1222     HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
1223                                          size_high, size_low, nameA );
1224     HeapFree( GetProcessHeap(), 0, nameA );
1225     return ret;
1226 }
1227
1228
1229 /***********************************************************************
1230  *             OpenFileMapping32A   (KERNEL32.397)
1231  * Opens a named file-mapping object.
1232  *
1233  * RETURNS
1234  *      Handle: Success
1235  *      NULL: Failure
1236  */
1237 HANDLE32 WINAPI OpenFileMapping32A(
1238                 DWORD access,   /* [in] Access mode */
1239                 BOOL32 inherit, /* [in] Inherit flag */
1240                 LPCSTR name )   /* [in] Name of file-mapping object */
1241 {
1242     HANDLE32 handle = 0;
1243     K32OBJ *obj;
1244     struct open_named_obj_request req;
1245     struct open_named_obj_reply reply;
1246     int len = name ? strlen(name) + 1 : 0;
1247
1248     req.type    = OPEN_MAPPING;
1249     req.access  = access;
1250     req.inherit = inherit;
1251     CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
1252     CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
1253
1254     if (reply.handle != -1)
1255     {
1256         SYSTEM_LOCK();
1257         if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
1258         {
1259             handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
1260             K32OBJ_DecCount( obj );
1261             if (handle == INVALID_HANDLE_VALUE32)
1262                 handle = 0; /* must return 0 on failure, not -1 */
1263         }
1264         else CLIENT_CloseHandle( reply.handle );
1265         SYSTEM_UNLOCK();
1266     }
1267     return handle;
1268 }
1269
1270
1271 /***********************************************************************
1272  *             OpenFileMapping32W   (KERNEL32.398)
1273  * See OpenFileMapping32A
1274  */
1275 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1276 {
1277     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1278     HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1279     HeapFree( GetProcessHeap(), 0, nameA );
1280     return ret;
1281 }
1282
1283
1284 /***********************************************************************
1285  *           VIRTUAL_DestroyMapping
1286  *
1287  * Destroy a FILE_MAPPING object.
1288  */
1289 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1290 {
1291     FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1292     assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1293
1294     if (mapping->file) K32OBJ_DecCount( mapping->file );
1295     ptr->type = K32OBJ_UNKNOWN;
1296     HeapFree( SystemHeap, 0, mapping );
1297 }
1298
1299
1300 /***********************************************************************
1301  *             MapViewOfFile   (KERNEL32.385)
1302  * Maps a view of a file into the address space
1303  *
1304  * RETURNS
1305  *      Starting address of mapped view
1306  *      NULL: Failure
1307  */
1308 LPVOID WINAPI MapViewOfFile(
1309               HANDLE32 mapping,  /* [in] File-mapping object to map */
1310               DWORD access,      /* [in] Access mode */
1311               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1312               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1313               DWORD count        /* [in] Number of bytes to map */
1314 ) {
1315     return MapViewOfFileEx( mapping, access, offset_high,
1316                             offset_low, count, NULL );
1317 }
1318
1319
1320 /***********************************************************************
1321  *             MapViewOfFileEx   (KERNEL32.386)
1322  * Maps a view of a file into the address space
1323  *
1324  * RETURNS
1325  *      Starting address of mapped view
1326  *      NULL: Failure
1327  */
1328 LPVOID WINAPI MapViewOfFileEx(
1329               HANDLE32 handle,   /* [in] File-mapping object to map */
1330               DWORD access,      /* [in] Access mode */
1331               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1332               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1333               DWORD count,       /* [in] Number of bytes to map */
1334               LPVOID addr        /* [in] Suggested starting address for mapped view */
1335 ) {
1336     FILE_VIEW *view;
1337     UINT32 ptr = (UINT32)-1, size = 0;
1338     int flags = MAP_PRIVATE;
1339     int unix_handle = -1;
1340     struct get_mapping_info_request req;
1341     struct get_mapping_info_reply info;
1342
1343     /* Check parameters */
1344
1345     if ((offset_low & granularity_mask) ||
1346         (addr && ((UINT32)addr & granularity_mask)))
1347     {
1348         SetLastError( ERROR_INVALID_PARAMETER );
1349         return NULL;
1350     }
1351
1352     req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
1353                                          K32OBJ_MEM_MAPPED_FILE, 0 /* FIXME */ );
1354     CLIENT_SendRequest( REQ_GET_MAPPING_INFO, -1, 1, &req, sizeof(req) );
1355     if (CLIENT_WaitSimpleReply( &info, sizeof(info), &unix_handle ))
1356         goto error;
1357
1358     if (info.size_high || offset_high)
1359         ERR(virtual, "Offsets larger than 4Gb not supported\n");
1360
1361     if ((offset_low >= info.size_low) ||
1362         (count > info.size_low - offset_low))
1363     {
1364         SetLastError( ERROR_INVALID_PARAMETER );
1365         goto error;
1366     }
1367     if (count) size = ROUND_SIZE( offset_low, count );
1368     else size = info.size_low - offset_low;
1369
1370     switch(access)
1371     {
1372     case FILE_MAP_ALL_ACCESS:
1373     case FILE_MAP_WRITE:
1374     case FILE_MAP_WRITE | FILE_MAP_READ:
1375         if (!(info.protect & VPROT_WRITE))
1376         {
1377             SetLastError( ERROR_INVALID_PARAMETER );
1378             goto error;
1379         }
1380         flags = MAP_SHARED;
1381         /* fall through */
1382     case FILE_MAP_READ:
1383     case FILE_MAP_COPY:
1384     case FILE_MAP_COPY | FILE_MAP_READ:
1385         if (info.protect & VPROT_READ) break;
1386         /* fall through */
1387     default:
1388         SetLastError( ERROR_INVALID_PARAMETER );
1389         goto error;
1390     }
1391
1392     /* Map the file */
1393
1394     TRACE(virtual, "handle=%x size=%x offset=%lx\n",
1395                      handle, size, offset_low );
1396
1397     ptr = (UINT32)FILE_dommap( unix_handle,
1398                                addr, 0, size, 0, offset_low,
1399                                VIRTUAL_GetUnixProt( info.protect ),
1400                                flags );
1401     if (ptr == (UINT32)-1) {
1402         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1403          * Platform Differences":
1404          * Windows NT: ERROR_INVALID_PARAMETER
1405          * Windows 95: ERROR_INVALID_ADDRESS.
1406          * FIXME: So should we add a module dependend check here? -MM
1407          */
1408         if (errno==ENOMEM)
1409             SetLastError( ERROR_OUTOFMEMORY );
1410         else
1411             SetLastError( ERROR_INVALID_PARAMETER );
1412         goto error;
1413     }
1414
1415     if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1416                                      info.protect, handle )))
1417     {
1418         SetLastError( ERROR_OUTOFMEMORY );
1419         goto error;
1420     }
1421     if (unix_handle != -1) close( unix_handle );
1422     return (LPVOID)ptr;
1423
1424 error:
1425     if (unix_handle != -1) close( unix_handle );
1426     if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1427     return NULL;
1428 }
1429
1430
1431 /***********************************************************************
1432  *             FlushViewOfFile   (KERNEL32.262)
1433  * Writes to the disk a byte range within a mapped view of a file
1434  *
1435  * RETURNS
1436  *      TRUE: Success
1437  *      FALSE: Failure
1438  */
1439 BOOL32 WINAPI FlushViewOfFile(
1440               LPCVOID base, /* [in] Start address of byte range to flush */
1441               DWORD cbFlush /* [in] Number of bytes in range */
1442 ) {
1443     FILE_VIEW *view;
1444     UINT32 addr = ROUND_ADDR( base );
1445
1446     TRACE(virtual, "FlushViewOfFile at %p for %ld bytes\n",
1447                      base, cbFlush );
1448
1449     if (!(view = VIRTUAL_FindView( addr )))
1450     {
1451         SetLastError( ERROR_INVALID_PARAMETER );
1452         return FALSE;
1453     }
1454     if (!cbFlush) cbFlush = view->size;
1455     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1456     SetLastError( ERROR_INVALID_PARAMETER );
1457     return FALSE;
1458 }
1459
1460
1461 /***********************************************************************
1462  *             UnmapViewOfFile   (KERNEL32.540)
1463  * Unmaps a mapped view of a file.
1464  *
1465  * NOTES
1466  *      Should addr be an LPCVOID?
1467  *
1468  * RETURNS
1469  *      TRUE: Success
1470  *      FALSE: Failure
1471  */
1472 BOOL32 WINAPI UnmapViewOfFile(
1473               LPVOID addr /* [in] Address where mapped view begins */
1474 ) {
1475     FILE_VIEW *view;
1476     UINT32 base = ROUND_ADDR( addr );
1477     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1478     {
1479         SetLastError( ERROR_INVALID_PARAMETER );
1480         return FALSE;
1481     }
1482     VIRTUAL_DeleteView( view );
1483     return TRUE;
1484 }
1485
1486 /***********************************************************************
1487  *             VIRTUAL_MapFileW
1488  *
1489  * Helper function to map a file to memory:
1490  *  name                        -       file name
1491  *  [RETURN] ptr                -       pointer to mapped file
1492  */
1493 LPVOID VIRTUAL_MapFileW( LPCWSTR name )
1494 {
1495     HANDLE32 hFile, hMapping;
1496     LPVOID ptr = NULL;
1497
1498     hFile = CreateFile32W( name, GENERIC_READ, FILE_SHARE_READ, NULL,
1499                            OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
1500     if (hFile != INVALID_HANDLE_VALUE32)
1501     {
1502         hMapping = CreateFileMapping32A( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
1503         CloseHandle( hFile );
1504         if (hMapping)
1505         {
1506             ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
1507             CloseHandle( hMapping );
1508         }
1509     }
1510     return ptr;
1511 }