memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #include <assert.h>
  10 #include <errno.h>
  11 #ifdef HAVE_SYS_ERRNO_H
  12 #include <sys/errno.h>
  13 #endif
  14 #include <fcntl.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <string.h>
  19 #include <sys/types.h>
  20 #ifdef HAVE_SYS_MMAN_H
  21 #include <sys/mman.h>
  22 #endif
  23 #include "winbase.h"
  24 #include "wine/exception.h"
  25 #include "wine/unicode.h"
  26 #include "winerror.h"
  27 #include "file.h"
  28 #include "process.h"
  29 #include "global.h"
  30 #include "server.h"
  31 #include "debugtools.h"
  32
  33 DEFAULT_DEBUG_CHANNEL(virtual);
  34 DECLARE_DEBUG_CHANNEL(module);
  35
  36 #ifndef MS_SYNC
  37 #define MS_SYNC 0
  38 #endif
  39
  40 /* File view */
  41 typedef struct _FV
  42 {
  43     struct _FV   *next;        /* Next view */
  44     struct _FV   *prev;        /* Prev view */
  45     UINT        base;        /* Base address */
  46     UINT        size;        /* Size in bytes */
  47     UINT        flags;       /* Allocation flags */
  48     HANDLE      mapping;     /* Handle to the file mapping */
  49     HANDLERPROC   handlerProc; /* Fault handler */
  50     LPVOID        handlerArg;  /* Fault handler argument */
  51     BYTE          protect;     /* Protection for all pages at allocation time */
  52     BYTE          prot[1];     /* Protection byte for each page */
  53 } FILE_VIEW;
  54
  55 /* Per-view flags */
  56 #define VFLAG_SYSTEM     0x01
  57
  58 /* Conversion from VPROT_* to Win32 flags */
  59 static const BYTE VIRTUAL_Win32Flags[16] =
  60 {
  61     PAGE_NOACCESS,              /* 0 */
  62     PAGE_READONLY,              /* READ */
  63     PAGE_READWRITE,             /* WRITE */
  64     PAGE_READWRITE,             /* READ | WRITE */
  65     PAGE_EXECUTE,               /* EXEC */
  66     PAGE_EXECUTE_READ,          /* READ | EXEC */
  67     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  68     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  69     PAGE_WRITECOPY,             /* WRITECOPY */
  70     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  71     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  72     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  73     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  74     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  75     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  77 };
  78
  79
  80 static FILE_VIEW *VIRTUAL_FirstView;
  81
  82 #ifdef __i386__
  83 /* These are always the same on an i386, and it will be faster this way */
  84 # define page_mask  0xfff
  85 # define page_shift 12
  86 #else
  87 static UINT page_shift;
  88 static UINT page_mask;
  89 #endif  /* __i386__ */
  90 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
  91
  92 #define ROUND_ADDR(addr) \
  93    ((UINT)(addr) & ~page_mask)
  94
  95 #define ROUND_SIZE(addr,size) \
  96    (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
  97
  98 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
  99    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 100
 101
 102 /* filter for page-fault exceptions */
 103 static WINE_EXCEPTION_FILTER(page_fault)
 104 {
 105     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 106         return EXCEPTION_EXECUTE_HANDLER;
 107     return EXCEPTION_CONTINUE_SEARCH;
 108 }
 109
 110 /***********************************************************************
 111  *           VIRTUAL_GetProtStr
 112  */
 113 static const char *VIRTUAL_GetProtStr( BYTE prot )
 114 {
 115     static char buffer[6];
 116     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 117     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 118     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 119     buffer[3] = (prot & VPROT_WRITE) ?
 120                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 121     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 122     buffer[5] = 0;
 123     return buffer;
 124 }
 125
 126
 127 /***********************************************************************
 128  *           VIRTUAL_DumpView
 129  */
 130 static void VIRTUAL_DumpView( FILE_VIEW *view )
 131 {
 132     UINT i, count;
 133     UINT addr = view->base;
 134     BYTE prot = view->prot[0];
 135
 136     DPRINTF( "View: %08x - %08x%s",
 137           view->base, view->base + view->size - 1,
 138           (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 139     if (view->mapping)
 140         DPRINTF( " %d\n", view->mapping );
 141     else
 142         DPRINTF( " (anonymous)\n");
 143
 144     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 145     {
 146         if (view->prot[i] == prot) continue;
 147         DPRINTF( "      %08x - %08x %s\n",
 148               addr, addr + (count << page_shift) - 1,
 149               VIRTUAL_GetProtStr(prot) );
 150         addr += (count << page_shift);
 151         prot = view->prot[i];
 152         count = 0;
 153     }
 154     if (count)
 155         DPRINTF( "      %08x - %08x %s\n",
 156               addr, addr + (count << page_shift) - 1,
 157               VIRTUAL_GetProtStr(prot) );
 158 }
 159
 160
 161 /***********************************************************************
 162  *           VIRTUAL_Dump
 163  */
 164 void VIRTUAL_Dump(void)
 165 {
 166     FILE_VIEW *view = VIRTUAL_FirstView;
 167     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 168     while (view)
 169     {
 170         VIRTUAL_DumpView( view );
 171         view = view->next;
 172     }
 173 }
 174
 175
 176 /***********************************************************************
 177  *           VIRTUAL_FindView
 178  *
 179  * Find the view containing a given address.
 180  *
 181  * RETURNS
 182  *      View: Success
 183  *      NULL: Failure
 184  */
 185 static FILE_VIEW *VIRTUAL_FindView(
 186                   UINT addr /* [in] Address */
 187 ) {
 188     FILE_VIEW *view = VIRTUAL_FirstView;
 189     while (view)
 190     {
 191         if (view->base > addr) return NULL;
 192         if (view->base + view->size > addr) return view;
 193         view = view->next;
 194     }
 195     return NULL;
 196 }
 197
 198
 199 /***********************************************************************
 200  *           VIRTUAL_CreateView
 201  *
 202  * Create a new view and add it in the linked list.
 203  */
 204 static FILE_VIEW *VIRTUAL_CreateView( UINT base, UINT size, UINT flags,
 205                                       BYTE vprot, HANDLE mapping )
 206 {
 207     FILE_VIEW *view, *prev;
 208
 209     /* Create the view structure */
 210
 211     assert( !(base & page_mask) );
 212     assert( !(size & page_mask) );
 213     size >>= page_shift;
 214     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 215     view->base    = base;
 216     view->size    = size << page_shift;
 217     view->flags   = flags;
 218     view->mapping = mapping;
 219     view->protect = vprot;
 220     view->handlerProc = NULL;
 221     memset( view->prot, vprot, size );
 222
 223     /* Duplicate the mapping handle */
 224
 225     if ((view->mapping != -1) &&
 226         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 227                           GetCurrentProcess(), &view->mapping,
 228                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 229     {
 230         free( view );
 231         return NULL;
 232     }
 233
 234     /* Insert it in the linked list */
 235
 236     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 237     {
 238         view->next = VIRTUAL_FirstView;
 239         view->prev = NULL;
 240         if (view->next) view->next->prev = view;
 241         VIRTUAL_FirstView = view;
 242     }
 243     else
 244     {
 245         prev = VIRTUAL_FirstView;
 246         while (prev->next && (prev->next->base < base)) prev = prev->next;
 247         view->next = prev->next;
 248         view->prev = prev;
 249         if (view->next) view->next->prev = view;
 250         prev->next  = view;
 251     }
 252     VIRTUAL_DEBUG_DUMP_VIEW( view );
 253     return view;
 254 }
 255
 256
 257 /***********************************************************************
 258  *           VIRTUAL_DeleteView
 259  * Deletes a view.
 260  *
 261  * RETURNS
 262  *      None
 263  */
 264 static void VIRTUAL_DeleteView(
 265             FILE_VIEW *view /* [in] View */
 266 ) {
 267     if (!(view->flags & VFLAG_SYSTEM))
 268         FILE_munmap( (void *)view->base, 0, view->size );
 269     if (view->next) view->next->prev = view->prev;
 270     if (view->prev) view->prev->next = view->next;
 271     else VIRTUAL_FirstView = view->next;
 272     if (view->mapping) CloseHandle( view->mapping );
 273     free( view );
 274 }
 275
 276
 277 /***********************************************************************
 278  *           VIRTUAL_GetUnixProt
 279  *
 280  * Convert page protections to protection for mmap/mprotect.
 281  */
 282 static int VIRTUAL_GetUnixProt( BYTE vprot )
 283 {
 284     int prot = 0;
 285     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 286     {
 287         if (vprot & VPROT_READ) prot |= PROT_READ;
 288         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 289         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 290         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 291     }
 292     return prot;
 293 }
 294
 295
 296 /***********************************************************************
 297  *           VIRTUAL_GetWin32Prot
 298  *
 299  * Convert page protections to Win32 flags.
 300  *
 301  * RETURNS
 302  *      None
 303  */
 304 static void VIRTUAL_GetWin32Prot(
 305             BYTE vprot,     /* [in] Page protection flags */
 306             DWORD *protect, /* [out] Location to store Win32 protection flags */
 307             DWORD *state    /* [out] Location to store mem state flag */
 308 ) {
 309     if (protect) {
 310         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 311 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 312         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 313
 314         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 315     }
 316
 317     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           VIRTUAL_GetProt
 323  *
 324  * Build page protections from Win32 flags.
 325  *
 326  * RETURNS
 327  *      Value of page protection flags
 328  */
 329 static BYTE VIRTUAL_GetProt(
 330             DWORD protect  /* [in] Win32 protection flags */
 331 ) {
 332     BYTE vprot;
 333
 334     switch(protect & 0xff)
 335     {
 336     case PAGE_READONLY:
 337         vprot = VPROT_READ;
 338         break;
 339     case PAGE_READWRITE:
 340         vprot = VPROT_READ | VPROT_WRITE;
 341         break;
 342     case PAGE_WRITECOPY:
 343         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 344         break;
 345     case PAGE_EXECUTE:
 346         vprot = VPROT_EXEC;
 347         break;
 348     case PAGE_EXECUTE_READ:
 349         vprot = VPROT_EXEC | VPROT_READ;
 350         break;
 351     case PAGE_EXECUTE_READWRITE:
 352         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 353         break;
 354     case PAGE_EXECUTE_WRITECOPY:
 355         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 356         break;
 357     case PAGE_NOACCESS:
 358     default:
 359         vprot = 0;
 360         break;
 361     }
 362     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 363     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 364     return vprot;
 365 }
 366
 367
 368 /***********************************************************************
 369  *           VIRTUAL_SetProt
 370  *
 371  * Change the protection of a range of pages.
 372  *
 373  * RETURNS
 374  *      TRUE: Success
 375  *      FALSE: Failure
 376  */
 377 static BOOL VIRTUAL_SetProt(
 378               FILE_VIEW *view, /* [in] Pointer to view */
 379               UINT base,     /* [in] Starting address */
 380               UINT size,     /* [in] Size in bytes */
 381               BYTE vprot       /* [in] Protections to use */
 382 ) {
 383     TRACE("%08x-%08x %s\n",
 384                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 385
 386     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 387         return FALSE;  /* FIXME: last error */
 388
 389     memset( view->prot + ((base - view->base) >> page_shift),
 390             vprot, size >> page_shift );
 391     VIRTUAL_DEBUG_DUMP_VIEW( view );
 392     return TRUE;
 393 }
 394
 395
 396 /***********************************************************************
 397  *           map_image
 398  *
 399  * Map an executable (PE format) image into memory.
 400  */
 401 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 402                          DWORD header_size, HANDLE shared_file, DWORD shared_size )
 403 {
 404     IMAGE_DOS_HEADER *dos;
 405     IMAGE_NT_HEADERS *nt;
 406     IMAGE_SECTION_HEADER *sec;
 407     int i, pos;
 408     DWORD err = GetLastError();
 409     FILE_VIEW *view = NULL;
 410     char *ptr;
 411     int shared_fd = -1;
 412
 413     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 414
 415     /* zero-map the whole range */
 416
 417     if ((ptr = FILE_dommap( -1, base, 0, total_size, 0, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 418                             MAP_PRIVATE )) == (char *)-1)
 419     {
 420         ptr = FILE_dommap( -1, NULL, 0, total_size, 0, 0,
 421                            PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE );
 422         if (ptr == (char *)-1)
 423         {
 424             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 425             goto error;
 426         }
 427     }
 428     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 429
 430     if (!(view = VIRTUAL_CreateView( (UINT)ptr, total_size, 0,
 431                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 432                                      hmapping )))
 433     {
 434         FILE_munmap( ptr, 0, total_size );
 435         SetLastError( ERROR_OUTOFMEMORY );
 436         goto error;
 437     }
 438
 439     /* map the header */
 440
 441     if (FILE_dommap( fd, ptr, 0, header_size, 0, 0,
 442                      PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED ) == (char *)-1) goto error;
 443     dos = (IMAGE_DOS_HEADER *)ptr;
 444     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 445     if ((char *)(nt + 1) > ptr + header_size) goto error;
 446
 447     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 448     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 449
 450     /* check the architecture */
 451
 452     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 453     {
 454         MESSAGE("Trying to load PE image for unsupported architecture (");
 455         switch (nt->FileHeader.Machine)
 456         {
 457         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 458         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 459         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 460         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 461         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 462         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 463         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 464         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 465         }
 466         MESSAGE(")\n");
 467         goto error;
 468     }
 469
 470     /* retrieve the shared sections file */
 471
 472     if (shared_size)
 473     {
 474         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 475         CloseHandle( shared_file );  /* we no longer need it */
 476         shared_file = INVALID_HANDLE_VALUE;
 477     }
 478
 479     /* map all the sections */
 480
 481     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 482     {
 483         DWORD size;
 484
 485         /* a few sanity checks */
 486         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 487         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 488         {
 489             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 490                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 491             goto error;
 492         }
 493
 494         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 495             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 496         {
 497             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 498             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 499                           sec->Name, (char *)ptr + sec->VirtualAddress,
 500                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 501                           size, sec->Characteristics );
 502             if (FILE_dommap( shared_fd, (char *)ptr + sec->VirtualAddress, 0, size,
 503                              0, pos, PROT_READ|PROT_WRITE|PROT_EXEC,
 504                              MAP_SHARED|MAP_FIXED ) == (void *)-1)
 505             {
 506                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 507                 goto error;
 508             }
 509             pos += size;
 510             continue;
 511         }
 512
 513         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 514         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 515
 516         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 517                         sec->Name, (char *)ptr + sec->VirtualAddress,
 518                         sec->PointerToRawData, sec->SizeOfRawData,
 519                         sec->Characteristics );
 520
 521         /* Note: if the section is not aligned properly FILE_dommap will magically
 522          *       fall back to read(), so we don't need to check anything here.
 523          */
 524         if (FILE_dommap( fd, (char *)ptr + sec->VirtualAddress, 0, sec->SizeOfRawData,
 525                          0, sec->PointerToRawData, PROT_READ|PROT_WRITE|PROT_EXEC,
 526                          MAP_PRIVATE | MAP_FIXED ) == (void *)-1)
 527         {
 528             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 529             goto error;
 530         }
 531
 532         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 533         {
 534             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 535             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 536             TRACE_(module)("clearing %p - %p\n",
 537                            (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData,
 538                            (char *)ptr + sec->VirtualAddress + end );
 539             memset( (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 540                     end - sec->SizeOfRawData );
 541         }
 542     }
 543
 544     SetLastError( err );  /* restore last error */
 545     close( fd );
 546     if (shared_fd != -1) close( shared_fd );
 547     return ptr;
 548
 549  error:
 550     if (view) VIRTUAL_DeleteView( view );
 551     close( fd );
 552     if (shared_fd != -1) close( shared_fd );
 553     if (shared_file != INVALID_HANDLE_VALUE) CloseHandle( shared_file );
 554     return NULL;
 555 }
 556
 557
 558 /***********************************************************************
 559  *           VIRTUAL_Init
 560  */
 561 #ifndef page_mask
 562 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 563 {
 564     DWORD page_size;
 565
 566 # ifdef HAVE_GETPAGESIZE
 567     page_size = getpagesize();
 568 # else
 569 #  ifdef __svr4__
 570     page_size = sysconf(_SC_PAGESIZE);
 571 #  else
 572 #   error Cannot get the page size on this platform
 573 #  endif
 574 # endif
 575     page_mask = page_size - 1;
 576     /* Make sure we have a power of 2 */
 577     assert( !(page_size & page_mask) );
 578     page_shift = 0;
 579     while ((1 << page_shift) != page_size) page_shift++;
 580 }
 581 #endif  /* page_mask */
 582
 583
 584 /***********************************************************************
 585  *           VIRTUAL_GetPageSize
 586  */
 587 DWORD VIRTUAL_GetPageSize(void)
 588 {
 589     return 1 << page_shift;
 590 }
 591
 592
 593 /***********************************************************************
 594  *           VIRTUAL_GetGranularity
 595  */
 596 DWORD VIRTUAL_GetGranularity(void)
 597 {
 598     return granularity_mask + 1;
 599 }
 600
 601
 602 /***********************************************************************
 603  *           VIRTUAL_SetFaultHandler
 604  */
 605 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 606 {
 607     FILE_VIEW *view;
 608
 609     if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
 610     view->handlerProc = proc;
 611     view->handlerArg  = arg;
 612     return TRUE;
 613 }
 614
 615 /***********************************************************************
 616  *           VIRTUAL_HandleFault
 617  */
 618 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 619 {
 620     FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
 621     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 622
 623     if (view)
 624     {
 625         if (view->handlerProc)
 626         {
 627             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 628         }
 629         else
 630         {
 631             BYTE vprot = view->prot[((UINT)addr - view->base) >> page_shift];
 632             UINT page = (UINT)addr & ~page_mask;
 633             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 634             if (vprot & VPROT_GUARD)
 635             {
 636                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 637                 ret = STATUS_GUARD_PAGE_VIOLATION;
 638             }
 639             /* is it inside the stack guard pages? */
 640             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 641                 ret = STATUS_STACK_OVERFLOW;
 642         }
 643     }
 644     return ret;
 645 }
 646
 647
 648 /***********************************************************************
 649  *             VirtualAlloc   (KERNEL32.548)
 650  * Reserves or commits a region of pages in virtual address space
 651  *
 652  * RETURNS
 653  *      Base address of allocated region of pages
 654  *      NULL: Failure
 655  */
 656 LPVOID WINAPI VirtualAlloc(
 657               LPVOID addr,  /* [in] Address of region to reserve or commit */
 658               DWORD size,   /* [in] Size of region */
 659               DWORD type,   /* [in] Type of allocation */
 660               DWORD protect /* [in] Type of access protection */
 661 ) {
 662     FILE_VIEW *view;
 663     UINT base, ptr, view_size;
 664     BYTE vprot;
 665
 666     TRACE("%08x %08lx %lx %08lx\n",
 667                      (UINT)addr, size, type, protect );
 668
 669     /* Round parameters to a page boundary */
 670
 671     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 672     {
 673         SetLastError( ERROR_OUTOFMEMORY );
 674         return NULL;
 675     }
 676     if (addr)
 677     {
 678         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 679             base = (UINT)addr & ~granularity_mask;
 680         else
 681             base = ROUND_ADDR( addr );
 682         size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
 683         if ((base <= granularity_mask) || (base + size < base))
 684         {
 685             /* disallow low 64k and wrap-around */
 686             SetLastError( ERROR_INVALID_PARAMETER );
 687             return NULL;
 688         }
 689     }
 690     else
 691     {
 692         base = 0;
 693         size = (size + page_mask) & ~page_mask;
 694     }
 695
 696     if (type & MEM_TOP_DOWN) {
 697         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 698          *        Is there _ANY_ way to do it with UNIX mmap()?
 699          */
 700         WARN("MEM_TOP_DOWN ignored\n");
 701         type &= ~MEM_TOP_DOWN;
 702     }
 703     /* Compute the protection flags */
 704
 705     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 706         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 707     {
 708         SetLastError( ERROR_INVALID_PARAMETER );
 709         return NULL;
 710     }
 711     if (type & (MEM_COMMIT | MEM_SYSTEM))
 712         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 713     else vprot = 0;
 714
 715     /* Reserve the memory */
 716
 717     if ((type & MEM_RESERVE) || !base)
 718     {
 719         view_size = size + (base ? 0 : granularity_mask + 1);
 720         if (type & MEM_SYSTEM)
 721              ptr = base;
 722         else
 723              ptr = (UINT)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
 724                                        VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 725         if (ptr == (UINT)-1)
 726         {
 727             SetLastError( ERROR_OUTOFMEMORY );
 728             return NULL;
 729         }
 730         if (!base)
 731         {
 732             /* Release the extra memory while keeping the range */
 733             /* starting on a 64k boundary. */
 734
 735             if (ptr & granularity_mask)
 736             {
 737                 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
 738                 FILE_munmap( (void *)ptr, 0, extra );
 739                 ptr += extra;
 740                 view_size -= extra;
 741             }
 742             if (view_size > size)
 743                 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
 744         }
 745         else if (ptr != base)
 746         {
 747             /* We couldn't get the address we wanted */
 748             FILE_munmap( (void *)ptr, 0, view_size );
 749             SetLastError( ERROR_INVALID_ADDRESS );
 750             return NULL;
 751         }
 752         if (!(view = VIRTUAL_CreateView( ptr, size, (type & MEM_SYSTEM) ?
 753                                          VFLAG_SYSTEM : 0, vprot, -1 )))
 754         {
 755             FILE_munmap( (void *)ptr, 0, size );
 756             SetLastError( ERROR_OUTOFMEMORY );
 757             return NULL;
 758         }
 759         VIRTUAL_DEBUG_DUMP_VIEW( view );
 760         return (LPVOID)ptr;
 761     }
 762
 763     /* Commit the pages */
 764
 765     if (!(view = VIRTUAL_FindView( base )) ||
 766         (base + size > view->base + view->size))
 767     {
 768         SetLastError( ERROR_INVALID_ADDRESS );
 769         return NULL;
 770     }
 771
 772     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 773     return (LPVOID)base;
 774 }
 775
 776
 777 /***********************************************************************
 778  *             VirtualFree   (KERNEL32.550)
 779  * Release or decommits a region of pages in virtual address space.
 780  *
 781  * RETURNS
 782  *      TRUE: Success
 783  *      FALSE: Failure
 784  */
 785 BOOL WINAPI VirtualFree(
 786               LPVOID addr, /* [in] Address of region of committed pages */
 787               DWORD size,  /* [in] Size of region */
 788               DWORD type   /* [in] Type of operation */
 789 ) {
 790     FILE_VIEW *view;
 791     UINT base;
 792
 793     TRACE("%08x %08lx %lx\n",
 794                      (UINT)addr, size, type );
 795
 796     /* Fix the parameters */
 797
 798     size = ROUND_SIZE( addr, size );
 799     base = ROUND_ADDR( addr );
 800
 801     if (!(view = VIRTUAL_FindView( base )) ||
 802         (base + size > view->base + view->size))
 803     {
 804         SetLastError( ERROR_INVALID_PARAMETER );
 805         return FALSE;
 806     }
 807
 808     /* Compute the protection flags */
 809
 810     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 811     {
 812         SetLastError( ERROR_INVALID_PARAMETER );
 813         return FALSE;
 814     }
 815
 816     /* Free the pages */
 817
 818     if (type == MEM_RELEASE)
 819     {
 820         if (size || (base != view->base))
 821         {
 822             SetLastError( ERROR_INVALID_PARAMETER );
 823             return FALSE;
 824         }
 825         VIRTUAL_DeleteView( view );
 826         return TRUE;
 827     }
 828
 829     /* Decommit the pages by remapping zero-pages instead */
 830
 831     if (FILE_dommap( -1, (LPVOID)base, 0, size, 0, 0,
 832                      VIRTUAL_GetUnixProt( 0 ), MAP_PRIVATE|MAP_FIXED )
 833         != (LPVOID)base)
 834         ERR( "Could not remap pages, expect trouble\n" );
 835     return VIRTUAL_SetProt( view, base, size, 0 );
 836 }
 837
 838
 839 /***********************************************************************
 840  *             VirtualLock   (KERNEL32.551)
 841  * Locks the specified region of virtual address space
 842  *
 843  * NOTE
 844  *      Always returns TRUE
 845  *
 846  * RETURNS
 847  *      TRUE: Success
 848  *      FALSE: Failure
 849  */
 850 BOOL WINAPI VirtualLock(
 851               LPVOID addr, /* [in] Address of first byte of range to lock */
 852               DWORD size   /* [in] Number of bytes in range to lock */
 853 ) {
 854     return TRUE;
 855 }
 856
 857
 858 /***********************************************************************
 859  *             VirtualUnlock   (KERNEL32.556)
 860  * Unlocks a range of pages in the virtual address space
 861  *
 862  * NOTE
 863  *      Always returns TRUE
 864  *
 865  * RETURNS
 866  *      TRUE: Success
 867  *      FALSE: Failure
 868  */
 869 BOOL WINAPI VirtualUnlock(
 870               LPVOID addr, /* [in] Address of first byte of range */
 871               DWORD size   /* [in] Number of bytes in range */
 872 ) {
 873     return TRUE;
 874 }
 875
 876
 877 /***********************************************************************
 878  *             VirtualProtect   (KERNEL32.552)
 879  * Changes the access protection on a region of committed pages
 880  *
 881  * RETURNS
 882  *      TRUE: Success
 883  *      FALSE: Failure
 884  */
 885 BOOL WINAPI VirtualProtect(
 886               LPVOID addr,     /* [in] Address of region of committed pages */
 887               DWORD size,      /* [in] Size of region */
 888               DWORD new_prot,  /* [in] Desired access protection */
 889               LPDWORD old_prot /* [out] Address of variable to get old protection */
 890 ) {
 891     FILE_VIEW *view;
 892     UINT base, i;
 893     BYTE vprot, *p;
 894
 895     TRACE("%08x %08lx %08lx\n",
 896                      (UINT)addr, size, new_prot );
 897
 898     /* Fix the parameters */
 899
 900     size = ROUND_SIZE( addr, size );
 901     base = ROUND_ADDR( addr );
 902
 903     if (!(view = VIRTUAL_FindView( base )) ||
 904         (base + size > view->base + view->size))
 905     {
 906         SetLastError( ERROR_INVALID_PARAMETER );
 907         return FALSE;
 908     }
 909
 910     /* Make sure all the pages are committed */
 911
 912     p = view->prot + ((base - view->base) >> page_shift);
 913     for (i = size >> page_shift; i; i--, p++)
 914     {
 915         if (!(*p & VPROT_COMMITTED))
 916         {
 917             SetLastError( ERROR_INVALID_PARAMETER );
 918             return FALSE;
 919         }
 920     }
 921
 922     VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 923     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 924     return VIRTUAL_SetProt( view, base, size, vprot );
 925 }
 926
 927
 928 /***********************************************************************
 929  *             VirtualProtectEx   (KERNEL32.553)
 930  * Changes the access protection on a region of committed pages in the
 931  * virtual address space of a specified process
 932  *
 933  * RETURNS
 934  *      TRUE: Success
 935  *      FALSE: Failure
 936  */
 937 BOOL WINAPI VirtualProtectEx(
 938               HANDLE handle, /* [in]  Handle of process */
 939               LPVOID addr,     /* [in]  Address of region of committed pages */
 940               DWORD size,      /* [in]  Size of region */
 941               DWORD new_prot,  /* [in]  Desired access protection */
 942               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
 943 {
 944     if (MapProcessHandle( handle ) == GetCurrentProcessId())
 945         return VirtualProtect( addr, size, new_prot, old_prot );
 946     ERR("Unsupported on other process\n");
 947     return FALSE;
 948 }
 949
 950
 951 /***********************************************************************
 952  *             VirtualQuery   (KERNEL32.554)
 953  * Provides info about a range of pages in virtual address space
 954  *
 955  * RETURNS
 956  *      Number of bytes returned in information buffer
 957  */
 958 DWORD WINAPI VirtualQuery(
 959              LPCVOID addr,                    /* [in]  Address of region */
 960              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
 961              DWORD len                        /* [in]  Size of buffer */
 962 ) {
 963     FILE_VIEW *view = VIRTUAL_FirstView;
 964     UINT base = ROUND_ADDR( addr );
 965     UINT alloc_base = 0;
 966     UINT size = 0;
 967
 968     /* Find the view containing the address */
 969
 970     for (;;)
 971     {
 972         if (!view)
 973         {
 974             size = 0xffff0000 - alloc_base;
 975             break;
 976         }
 977         if (view->base > base)
 978         {
 979             size = view->base - alloc_base;
 980             view = NULL;
 981             break;
 982         }
 983         if (view->base + view->size > base)
 984         {
 985             alloc_base = view->base;
 986             size = view->size;
 987             break;
 988         }
 989         alloc_base = view->base + view->size;
 990         view = view->next;
 991     }
 992
 993     /* Fill the info structure */
 994
 995     if (!view)
 996     {
 997         info->State             = MEM_FREE;
 998         info->Protect           = 0;
 999         info->AllocationProtect = 0;
1000         info->Type              = 0;
1001     }
1002     else
1003     {
1004         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1005         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1006         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1007             if (view->prot[size >> page_shift] != vprot) break;
1008         info->AllocationProtect = view->protect;
1009         info->Type              = MEM_PRIVATE;  /* FIXME */
1010     }
1011
1012     info->BaseAddress    = (LPVOID)base;
1013     info->AllocationBase = (LPVOID)alloc_base;
1014     info->RegionSize     = size - (base - alloc_base);
1015     return sizeof(*info);
1016 }
1017
1018
1019 /***********************************************************************
1020  *             VirtualQueryEx   (KERNEL32.555)
1021  * Provides info about a range of pages in virtual address space of a
1022  * specified process
1023  *
1024  * RETURNS
1025  *      Number of bytes returned in information buffer
1026  */
1027 DWORD WINAPI VirtualQueryEx(
1028              HANDLE handle,                 /* [in] Handle of process */
1029              LPCVOID addr,                    /* [in] Address of region */
1030              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1031              DWORD len                        /* [in] Size of buffer */ )
1032 {
1033     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1034         return VirtualQuery( addr, info, len );
1035     ERR("Unsupported on other process\n");
1036     return 0;
1037 }
1038
1039
1040 /***********************************************************************
1041  *             IsBadReadPtr   (KERNEL32.354)
1042  *
1043  * RETURNS
1044  *      FALSE: Process has read access to entire block
1045  *      TRUE: Otherwise
1046  */
1047 BOOL WINAPI IsBadReadPtr(
1048               LPCVOID ptr, /* Address of memory block */
1049               UINT size )  /* Size of block */
1050 {
1051     __TRY
1052     {
1053         volatile const char *p = ptr;
1054         volatile const char *end = p + size - 1;
1055         char dummy;
1056
1057         while (p < end)
1058         {
1059             dummy = *p;
1060             p += page_mask + 1;
1061         }
1062         dummy = *end;
1063     }
1064     __EXCEPT(page_fault) { return TRUE; }
1065     __ENDTRY
1066     return FALSE;
1067 }
1068
1069
1070 /***********************************************************************
1071  *             IsBadWritePtr   (KERNEL32.357)
1072  *
1073  * RETURNS
1074  *      FALSE: Process has write access to entire block
1075  *      TRUE: Otherwise
1076  */
1077 BOOL WINAPI IsBadWritePtr(
1078               LPVOID ptr, /* [in] Address of memory block */
1079               UINT size ) /* [in] Size of block in bytes */
1080 {
1081     __TRY
1082     {
1083         volatile char *p = ptr;
1084         volatile char *end = p + size - 1;
1085
1086         while (p < end)
1087         {
1088             *p |= 0;
1089             p += page_mask + 1;
1090         }
1091         *end |= 0;
1092     }
1093     __EXCEPT(page_fault) { return TRUE; }
1094     __ENDTRY
1095     return FALSE;
1096 }
1097
1098
1099 /***********************************************************************
1100  *             IsBadHugeReadPtr   (KERNEL32.352)
1101  * RETURNS
1102  *      FALSE: Process has read access to entire block
1103  *      TRUE: Otherwise
1104  */
1105 BOOL WINAPI IsBadHugeReadPtr(
1106               LPCVOID ptr, /* [in] Address of memory block */
1107               UINT size  /* [in] Size of block */
1108 ) {
1109     return IsBadReadPtr( ptr, size );
1110 }
1111
1112
1113 /***********************************************************************
1114  *             IsBadHugeWritePtr   (KERNEL32.353)
1115  * RETURNS
1116  *      FALSE: Process has write access to entire block
1117  *      TRUE: Otherwise
1118  */
1119 BOOL WINAPI IsBadHugeWritePtr(
1120               LPVOID ptr, /* [in] Address of memory block */
1121               UINT size /* [in] Size of block */
1122 ) {
1123     return IsBadWritePtr( ptr, size );
1124 }
1125
1126
1127 /***********************************************************************
1128  *             IsBadCodePtr   (KERNEL32.351)
1129  *
1130  * RETURNS
1131  *      FALSE: Process has read access to specified memory
1132  *      TRUE: Otherwise
1133  */
1134 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1135 {
1136     return IsBadReadPtr( ptr, 1 );
1137 }
1138
1139
1140 /***********************************************************************
1141  *             IsBadStringPtrA   (KERNEL32.355)
1142  *
1143  * RETURNS
1144  *      FALSE: Read access to all bytes in string
1145  *      TRUE: Else
1146  */
1147 BOOL WINAPI IsBadStringPtrA(
1148               LPCSTR str, /* [in] Address of string */
1149               UINT max )  /* [in] Maximum size of string */
1150 {
1151     __TRY
1152     {
1153         volatile const char *p = str;
1154         while (p < str + max) if (!*p++) break;
1155     }
1156     __EXCEPT(page_fault) { return TRUE; }
1157     __ENDTRY
1158     return FALSE;
1159 }
1160
1161
1162 /***********************************************************************
1163  *             IsBadStringPtrW   (KERNEL32.356)
1164  * See IsBadStringPtrA
1165  */
1166 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1167 {
1168     __TRY
1169     {
1170         volatile const WCHAR *p = str;
1171         while (p < str + max) if (!*p++) break;
1172     }
1173     __EXCEPT(page_fault) { return TRUE; }
1174     __ENDTRY
1175     return FALSE;
1176 }
1177
1178
1179 /***********************************************************************
1180  *             CreateFileMappingA   (KERNEL32.46)
1181  * Creates a named or unnamed file-mapping object for the specified file
1182  *
1183  * RETURNS
1184  *      Handle: Success
1185  *      0: Mapping object does not exist
1186  *      NULL: Failure
1187  */
1188 HANDLE WINAPI CreateFileMappingA(
1189                 HFILE hFile,   /* [in] Handle of file to map */
1190                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1191                 DWORD protect,   /* [in] Protection for mapping object */
1192                 DWORD size_high, /* [in] High-order 32 bits of object size */
1193                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1194                 LPCSTR name      /* [in] Name of file-mapping object */ )
1195 {
1196     HANDLE ret;
1197     BYTE vprot;
1198     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1199
1200     /* Check parameters */
1201
1202     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1203           hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1204
1205     if (len > MAX_PATH)
1206     {
1207         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1208         return 0;
1209     }
1210     vprot = VIRTUAL_GetProt( protect );
1211     if (protect & SEC_RESERVE)
1212     {
1213         if (hFile != INVALID_HANDLE_VALUE)
1214         {
1215             SetLastError( ERROR_INVALID_PARAMETER );
1216             return 0;
1217         }
1218     }
1219     else vprot |= VPROT_COMMITTED;
1220     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1221     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1222
1223     /* Create the server object */
1224
1225     SERVER_START_REQ
1226     {
1227         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1228                                                                len * sizeof(WCHAR) );
1229         req->file_handle = hFile;
1230         req->size_high   = size_high;
1231         req->size_low    = size_low;
1232         req->protect     = vprot;
1233         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1234         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1235         SetLastError(0);
1236         server_call( REQ_CREATE_MAPPING );
1237         ret = req->handle;
1238     }
1239     SERVER_END_REQ;
1240     if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
1241     return ret;
1242 }
1243
1244
1245 /***********************************************************************
1246  *             CreateFileMappingW   (KERNEL32.47)
1247  * See CreateFileMappingA
1248  */
1249 HANDLE WINAPI CreateFileMappingW( HFILE hFile, LPSECURITY_ATTRIBUTES sa,
1250                                   DWORD protect, DWORD size_high,
1251                                   DWORD size_low, LPCWSTR name )
1252 {
1253     HANDLE ret;
1254     BYTE vprot;
1255     DWORD len = name ? strlenW(name) : 0;
1256
1257     /* Check parameters */
1258
1259     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1260           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1261
1262     if (len > MAX_PATH)
1263     {
1264         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1265         return 0;
1266     }
1267
1268     vprot = VIRTUAL_GetProt( protect );
1269     if (protect & SEC_RESERVE)
1270     {
1271         if (hFile != INVALID_HANDLE_VALUE)
1272         {
1273             SetLastError( ERROR_INVALID_PARAMETER );
1274             return 0;
1275         }
1276     }
1277     else vprot |= VPROT_COMMITTED;
1278     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1279     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1280
1281     /* Create the server object */
1282
1283     SERVER_START_REQ
1284     {
1285         struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1286                                                                len * sizeof(WCHAR) );
1287         req->file_handle = hFile;
1288         req->size_high   = size_high;
1289         req->size_low    = size_low;
1290         req->protect     = vprot;
1291         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1292         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1293         SetLastError(0);
1294         server_call( REQ_CREATE_MAPPING );
1295         ret = req->handle;
1296     }
1297     SERVER_END_REQ;
1298     if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
1299     return ret;
1300 }
1301
1302
1303 /***********************************************************************
1304  *             OpenFileMappingA   (KERNEL32.397)
1305  * Opens a named file-mapping object.
1306  *
1307  * RETURNS
1308  *      Handle: Success
1309  *      NULL: Failure
1310  */
1311 HANDLE WINAPI OpenFileMappingA(
1312                 DWORD access,   /* [in] Access mode */
1313                 BOOL inherit, /* [in] Inherit flag */
1314                 LPCSTR name )   /* [in] Name of file-mapping object */
1315 {
1316     HANDLE ret;
1317     DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1318     if (len > MAX_PATH)
1319     {
1320         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1321         return 0;
1322     }
1323     SERVER_START_REQ
1324     {
1325         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1326
1327         req->access  = access;
1328         req->inherit = inherit;
1329         if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1330         server_call( REQ_OPEN_MAPPING );
1331         ret = req->handle;
1332     }
1333     SERVER_END_REQ;
1334     if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
1335     return ret;
1336 }
1337
1338
1339 /***********************************************************************
1340  *             OpenFileMappingW   (KERNEL32.398)
1341  * See OpenFileMappingA
1342  */
1343 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1344 {
1345     HANDLE ret;
1346     DWORD len = name ? strlenW(name) : 0;
1347     if (len > MAX_PATH)
1348     {
1349         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1350         return 0;
1351     }
1352     SERVER_START_REQ
1353     {
1354         struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1355
1356         req->access  = access;
1357         req->inherit = inherit;
1358         memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1359         server_call( REQ_OPEN_MAPPING );
1360         ret = req->handle;
1361     }
1362     SERVER_END_REQ;
1363     if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
1364     return ret;
1365 }
1366
1367
1368 /***********************************************************************
1369  *             MapViewOfFile   (KERNEL32.385)
1370  * Maps a view of a file into the address space
1371  *
1372  * RETURNS
1373  *      Starting address of mapped view
1374  *      NULL: Failure
1375  */
1376 LPVOID WINAPI MapViewOfFile(
1377               HANDLE mapping,  /* [in] File-mapping object to map */
1378               DWORD access,      /* [in] Access mode */
1379               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1380               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1381               DWORD count        /* [in] Number of bytes to map */
1382 ) {
1383     return MapViewOfFileEx( mapping, access, offset_high,
1384                             offset_low, count, NULL );
1385 }
1386
1387
1388 /***********************************************************************
1389  *             MapViewOfFileEx   (KERNEL32.386)
1390  * Maps a view of a file into the address space
1391  *
1392  * RETURNS
1393  *      Starting address of mapped view
1394  *      NULL: Failure
1395  */
1396 LPVOID WINAPI MapViewOfFileEx(
1397               HANDLE handle,   /* [in] File-mapping object to map */
1398               DWORD access,      /* [in] Access mode */
1399               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1400               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1401               DWORD count,       /* [in] Number of bytes to map */
1402               LPVOID addr        /* [in] Suggested starting address for mapped view */
1403 ) {
1404     FILE_VIEW *view;
1405     UINT ptr = (UINT)-1, size = 0;
1406     int flags = MAP_PRIVATE;
1407     int unix_handle = -1;
1408     int prot;
1409     struct get_mapping_info_request *req = get_req_buffer();
1410
1411     /* Check parameters */
1412
1413     if ((offset_low & granularity_mask) ||
1414         (addr && ((UINT)addr & granularity_mask)))
1415     {
1416         SetLastError( ERROR_INVALID_PARAMETER );
1417         return NULL;
1418     }
1419
1420     req->handle = handle;
1421     if (server_call_fd( REQ_GET_MAPPING_INFO, -1, &unix_handle )) goto error;
1422     prot = req->protect;
1423
1424     if (prot & VPROT_IMAGE)
1425         return map_image( handle, unix_handle, req->base, req->size_low, req->header_size,
1426                           req->shared_file, req->shared_size );
1427
1428     if (req->size_high || offset_high)
1429         ERR("Offsets larger than 4Gb not supported\n");
1430
1431     if ((offset_low >= req->size_low) ||
1432         (count > req->size_low - offset_low))
1433     {
1434         SetLastError( ERROR_INVALID_PARAMETER );
1435         goto error;
1436     }
1437     if (count) size = ROUND_SIZE( offset_low, count );
1438     else size = req->size_low - offset_low;
1439
1440     switch(access)
1441     {
1442     case FILE_MAP_ALL_ACCESS:
1443     case FILE_MAP_WRITE:
1444     case FILE_MAP_WRITE | FILE_MAP_READ:
1445         if (!(prot & VPROT_WRITE))
1446         {
1447             SetLastError( ERROR_INVALID_PARAMETER );
1448             goto error;
1449         }
1450         flags = MAP_SHARED;
1451         /* fall through */
1452     case FILE_MAP_READ:
1453     case FILE_MAP_COPY:
1454     case FILE_MAP_COPY | FILE_MAP_READ:
1455         if (prot & VPROT_READ) break;
1456         /* fall through */
1457     default:
1458         SetLastError( ERROR_INVALID_PARAMETER );
1459         goto error;
1460     }
1461
1462     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1463      * which has a view of this mapping commits some pages, they will
1464      * appear commited in all other processes, which have the same
1465      * view created. Since we don`t support this yet, we create the
1466      * whole mapping commited.
1467      */
1468     prot |= VPROT_COMMITTED;
1469
1470     /* Map the file */
1471
1472     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1473
1474     ptr = (UINT)FILE_dommap( unix_handle, addr, 0, size, 0, offset_low,
1475                              VIRTUAL_GetUnixProt( prot ), flags );
1476     if (ptr == (UINT)-1) {
1477         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1478          * Platform Differences":
1479          * Windows NT: ERROR_INVALID_PARAMETER
1480          * Windows 95: ERROR_INVALID_ADDRESS.
1481          * FIXME: So should we add a module dependend check here? -MM
1482          */
1483         if (errno==ENOMEM)
1484             SetLastError( ERROR_OUTOFMEMORY );
1485         else
1486             SetLastError( ERROR_INVALID_PARAMETER );
1487         goto error;
1488     }
1489
1490     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1491     {
1492         SetLastError( ERROR_OUTOFMEMORY );
1493         goto error;
1494     }
1495     if (unix_handle != -1) close( unix_handle );
1496     return (LPVOID)ptr;
1497
1498 error:
1499     if (unix_handle != -1) close( unix_handle );
1500     if (ptr != (UINT)-1) FILE_munmap( (void *)ptr, 0, size );
1501     return NULL;
1502 }
1503
1504
1505 /***********************************************************************
1506  *             FlushViewOfFile   (KERNEL32.262)
1507  * Writes to the disk a byte range within a mapped view of a file
1508  *
1509  * RETURNS
1510  *      TRUE: Success
1511  *      FALSE: Failure
1512  */
1513 BOOL WINAPI FlushViewOfFile(
1514               LPCVOID base, /* [in] Start address of byte range to flush */
1515               DWORD cbFlush /* [in] Number of bytes in range */
1516 ) {
1517     FILE_VIEW *view;
1518     UINT addr = ROUND_ADDR( base );
1519
1520     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1521                      base, cbFlush );
1522
1523     if (!(view = VIRTUAL_FindView( addr )))
1524     {
1525         SetLastError( ERROR_INVALID_PARAMETER );
1526         return FALSE;
1527     }
1528     if (!cbFlush) cbFlush = view->size;
1529     if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1530     SetLastError( ERROR_INVALID_PARAMETER );
1531     return FALSE;
1532 }
1533
1534
1535 /***********************************************************************
1536  *             UnmapViewOfFile   (KERNEL32.540)
1537  * Unmaps a mapped view of a file.
1538  *
1539  * NOTES
1540  *      Should addr be an LPCVOID?
1541  *
1542  * RETURNS
1543  *      TRUE: Success
1544  *      FALSE: Failure
1545  */
1546 BOOL WINAPI UnmapViewOfFile(
1547               LPVOID addr /* [in] Address where mapped view begins */
1548 ) {
1549     FILE_VIEW *view;
1550     UINT base = ROUND_ADDR( addr );
1551     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1552     {
1553         SetLastError( ERROR_INVALID_PARAMETER );
1554         return FALSE;
1555     }
1556     VIRTUAL_DeleteView( view );
1557     return TRUE;
1558 }
1559
1560 /***********************************************************************
1561  *             VIRTUAL_MapFileW
1562  *
1563  * Helper function to map a file to memory:
1564  *  name                        -       file name
1565  *  [RETURN] ptr                -       pointer to mapped file
1566  */
1567 LPVOID VIRTUAL_MapFileW( LPCWSTR name )
1568 {
1569     HANDLE hFile, hMapping;
1570     LPVOID ptr = NULL;
1571
1572     hFile = CreateFileW( name, GENERIC_READ, FILE_SHARE_READ, NULL,
1573                            OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
1574     if (hFile != INVALID_HANDLE_VALUE)
1575     {
1576         hMapping = CreateFileMappingA( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
1577         CloseHandle( hFile );
1578         if (hMapping)
1579         {
1580             ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
1581             CloseHandle( hMapping );
1582         }
1583     }
1584     return ptr;
1585 }