memory/virtual.c

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