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