memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <errno.h>
  26 #ifdef HAVE_SYS_ERRNO_H
  27 #include <sys/errno.h>
  28 #endif
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <sys/types.h>
  35 #ifdef HAVE_SYS_MMAN_H
  36 #include <sys/mman.h>
  37 #endif
  38 #include "winnls.h"
  39 #include "winbase.h"
  40 #include "wine/exception.h"
  41 #include "wine/unicode.h"
  42 #include "wine/library.h"
  43 #include "winerror.h"
  44 #include "file.h"
  45 #include "global.h"
  46 #include "wine/server.h"
  47 #include "msvcrt/excpt.h"
  48 #include "wine/debug.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
  51 WINE_DECLARE_DEBUG_CHANNEL(module);
  52
  53 #ifndef MS_SYNC
  54 #define MS_SYNC 0
  55 #endif
  56
  57 /* File view */
  58 typedef struct _FV
  59 {
  60     struct _FV   *next;        /* Next view */
  61     struct _FV   *prev;        /* Prev view */
  62     void         *base;        /* Base address */
  63     UINT          size;        /* Size in bytes */
  64     UINT          flags;       /* Allocation flags */
  65     HANDLE        mapping;     /* Handle to the file mapping */
  66     HANDLERPROC   handlerProc; /* Fault handler */
  67     LPVOID        handlerArg;  /* Fault handler argument */
  68     BYTE          protect;     /* Protection for all pages at allocation time */
  69     BYTE          prot[1];     /* Protection byte for each page */
  70 } FILE_VIEW;
  71
  72 /* Per-view flags */
  73 #define VFLAG_SYSTEM     0x01
  74 #define VFLAG_VALLOC     0x02  /* allocated by VirtualAlloc */
  75
  76 /* Conversion from VPROT_* to Win32 flags */
  77 static const BYTE VIRTUAL_Win32Flags[16] =
  78 {
  79     PAGE_NOACCESS,              /* 0 */
  80     PAGE_READONLY,              /* READ */
  81     PAGE_READWRITE,             /* WRITE */
  82     PAGE_READWRITE,             /* READ | WRITE */
  83     PAGE_EXECUTE,               /* EXEC */
  84     PAGE_EXECUTE_READ,          /* READ | EXEC */
  85     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  86     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  87     PAGE_WRITECOPY,             /* WRITECOPY */
  88     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  89     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  90     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  91     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  92     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  93     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  94     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  95 };
  96
  97
  98 static FILE_VIEW *VIRTUAL_FirstView;
  99 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
 100
 101 #ifdef __i386__
 102 /* These are always the same on an i386, and it will be faster this way */
 103 # define page_mask  0xfff
 104 # define page_shift 12
 105 # define page_size  0x1000
 106 #else
 107 static UINT page_shift;
 108 static UINT page_mask;
 109 static UINT page_size;
 110 #endif  /* __i386__ */
 111 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
 112
 113 #define ROUND_ADDR(addr,mask) \
 114    ((void *)((UINT_PTR)(addr) & ~(mask)))
 115
 116 #define ROUND_SIZE(addr,size) \
 117    (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
 118
 119 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 120    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 121
 122 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
 123                             DWORD offset_high, int prot, int flags, BOOL *removable );
 124
 125 /* filter for page-fault exceptions */
 126 static WINE_EXCEPTION_FILTER(page_fault)
 127 {
 128     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 129         return EXCEPTION_EXECUTE_HANDLER;
 130     return EXCEPTION_CONTINUE_SEARCH;
 131 }
 132
 133 /***********************************************************************
 134  *           VIRTUAL_GetProtStr
 135  */
 136 static const char *VIRTUAL_GetProtStr( BYTE prot )
 137 {
 138     static char buffer[6];
 139     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 140     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 141     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 142     buffer[3] = (prot & VPROT_WRITE) ?
 143                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 144     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 145     buffer[5] = 0;
 146     return buffer;
 147 }
 148
 149
 150 /***********************************************************************
 151  *           VIRTUAL_DumpView
 152  */
 153 static void VIRTUAL_DumpView( FILE_VIEW *view )
 154 {
 155     UINT i, count;
 156     char *addr = view->base;
 157     BYTE prot = view->prot[0];
 158
 159     DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
 160     if (view->flags & VFLAG_SYSTEM)
 161         DPRINTF( " (system)\n" );
 162     else if (view->flags & VFLAG_VALLOC)
 163         DPRINTF( " (valloc)\n" );
 164     else if (view->mapping)
 165         DPRINTF( " %d\n", view->mapping );
 166     else
 167         DPRINTF( " (anonymous)\n");
 168
 169     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 170     {
 171         if (view->prot[i] == prot) continue;
 172         DPRINTF( "      %p - %p %s\n",
 173                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 174         addr += (count << page_shift);
 175         prot = view->prot[i];
 176         count = 0;
 177     }
 178     if (count)
 179         DPRINTF( "      %p - %p %s\n",
 180                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 181 }
 182
 183
 184 /***********************************************************************
 185  *           VIRTUAL_Dump
 186  */
 187 void VIRTUAL_Dump(void)
 188 {
 189     FILE_VIEW *view;
 190     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 191     EnterCriticalSection(&csVirtual);
 192     view = VIRTUAL_FirstView;
 193     while (view)
 194     {
 195         VIRTUAL_DumpView( view );
 196         view = view->next;
 197     }
 198     LeaveCriticalSection(&csVirtual);
 199 }
 200
 201
 202 /***********************************************************************
 203  *           VIRTUAL_FindView
 204  *
 205  * Find the view containing a given address.
 206  *
 207  * RETURNS
 208  *      View: Success
 209  *      NULL: Failure
 210  */
 211 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
 212 {
 213     FILE_VIEW *view;
 214
 215     EnterCriticalSection(&csVirtual);
 216     view = VIRTUAL_FirstView;
 217     while (view)
 218     {
 219         if (view->base > addr)
 220         {
 221             view = NULL;
 222             break;
 223         }
 224         if (view->base + view->size > addr) break;
 225         view = view->next;
 226     }
 227     LeaveCriticalSection(&csVirtual);
 228     return view;
 229 }
 230
 231
 232 /***********************************************************************
 233  *           VIRTUAL_CreateView
 234  *
 235  * Create a new view and add it in the linked list.
 236  */
 237 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
 238                                       BYTE vprot, HANDLE mapping )
 239 {
 240     FILE_VIEW *view, *prev;
 241
 242     /* Create the view structure */
 243
 244     assert( !((unsigned int)base & page_mask) );
 245     assert( !(size & page_mask) );
 246     size >>= page_shift;
 247     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 248     view->base    = base;
 249     view->size    = size << page_shift;
 250     view->flags   = flags;
 251     view->mapping = mapping;
 252     view->protect = vprot;
 253     view->handlerProc = NULL;
 254     memset( view->prot, vprot, size );
 255
 256     /* Duplicate the mapping handle */
 257
 258     if (view->mapping &&
 259         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 260                           GetCurrentProcess(), &view->mapping,
 261                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 262     {
 263         free( view );
 264         return NULL;
 265     }
 266
 267     /* Insert it in the linked list */
 268
 269     EnterCriticalSection(&csVirtual);
 270     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 271     {
 272         view->next = VIRTUAL_FirstView;
 273         view->prev = NULL;
 274         if (view->next) view->next->prev = view;
 275         VIRTUAL_FirstView = view;
 276     }
 277     else
 278     {
 279         prev = VIRTUAL_FirstView;
 280         while (prev->next && (prev->next->base < base)) prev = prev->next;
 281         view->next = prev->next;
 282         view->prev = prev;
 283         if (view->next) view->next->prev = view;
 284         prev->next  = view;
 285     }
 286     LeaveCriticalSection(&csVirtual);
 287     VIRTUAL_DEBUG_DUMP_VIEW( view );
 288     return view;
 289 }
 290
 291
 292 /***********************************************************************
 293  *           VIRTUAL_DeleteView
 294  * Deletes a view.
 295  *
 296  * RETURNS
 297  *      None
 298  */
 299 static void VIRTUAL_DeleteView(
 300             FILE_VIEW *view /* [in] View */
 301 ) {
 302     if (!(view->flags & VFLAG_SYSTEM))
 303         munmap( (void *)view->base, view->size );
 304     EnterCriticalSection(&csVirtual);
 305     if (view->next) view->next->prev = view->prev;
 306     if (view->prev) view->prev->next = view->next;
 307     else VIRTUAL_FirstView = view->next;
 308     LeaveCriticalSection(&csVirtual);
 309     if (view->mapping) NtClose( view->mapping );
 310     free( view );
 311 }
 312
 313
 314 /***********************************************************************
 315  *           VIRTUAL_GetUnixProt
 316  *
 317  * Convert page protections to protection for mmap/mprotect.
 318  */
 319 static int VIRTUAL_GetUnixProt( BYTE vprot )
 320 {
 321     int prot = 0;
 322     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 323     {
 324         if (vprot & VPROT_READ) prot |= PROT_READ;
 325         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 326         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 327         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 328     }
 329     return prot;
 330 }
 331
 332
 333 /***********************************************************************
 334  *           VIRTUAL_GetWin32Prot
 335  *
 336  * Convert page protections to Win32 flags.
 337  *
 338  * RETURNS
 339  *      None
 340  */
 341 static void VIRTUAL_GetWin32Prot(
 342             BYTE vprot,     /* [in] Page protection flags */
 343             DWORD *protect, /* [out] Location to store Win32 protection flags */
 344             DWORD *state    /* [out] Location to store mem state flag */
 345 ) {
 346     if (protect) {
 347         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 348 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 349         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 350
 351         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 352     }
 353
 354     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 355 }
 356
 357
 358 /***********************************************************************
 359  *           VIRTUAL_GetProt
 360  *
 361  * Build page protections from Win32 flags.
 362  *
 363  * RETURNS
 364  *      Value of page protection flags
 365  */
 366 static BYTE VIRTUAL_GetProt(
 367             DWORD protect  /* [in] Win32 protection flags */
 368 ) {
 369     BYTE vprot;
 370
 371     switch(protect & 0xff)
 372     {
 373     case PAGE_READONLY:
 374         vprot = VPROT_READ;
 375         break;
 376     case PAGE_READWRITE:
 377         vprot = VPROT_READ | VPROT_WRITE;
 378         break;
 379     case PAGE_WRITECOPY:
 380         /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
 381          * that the hFile must have been opened with GENERIC_READ and
 382          * GENERIC_WRITE access.  This is WRONG as tests show that you
 383          * only need GENERIC_READ access (at least for Win9x,
 384          * FIXME: what about NT?).  Thus, we don't put VPROT_WRITE in
 385          * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
 386          */
 387         vprot = VPROT_READ | VPROT_WRITECOPY;
 388         break;
 389     case PAGE_EXECUTE:
 390         vprot = VPROT_EXEC;
 391         break;
 392     case PAGE_EXECUTE_READ:
 393         vprot = VPROT_EXEC | VPROT_READ;
 394         break;
 395     case PAGE_EXECUTE_READWRITE:
 396         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 397         break;
 398     case PAGE_EXECUTE_WRITECOPY:
 399         /* See comment for PAGE_WRITECOPY above */
 400         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
 401         break;
 402     case PAGE_NOACCESS:
 403     default:
 404         vprot = 0;
 405         break;
 406     }
 407     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 408     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 409     return vprot;
 410 }
 411
 412
 413 /***********************************************************************
 414  *           VIRTUAL_SetProt
 415  *
 416  * Change the protection of a range of pages.
 417  *
 418  * RETURNS
 419  *      TRUE: Success
 420  *      FALSE: Failure
 421  */
 422 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
 423                              void *base,      /* [in] Starting address */
 424                              UINT size,       /* [in] Size in bytes */
 425                              BYTE vprot )     /* [in] Protections to use */
 426 {
 427     TRACE("%p-%p %s\n",
 428           base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 429
 430     if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
 431         return FALSE;  /* FIXME: last error */
 432
 433     memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
 434             vprot, size >> page_shift );
 435     VIRTUAL_DEBUG_DUMP_VIEW( view );
 436     return TRUE;
 437 }
 438
 439
 440 /***********************************************************************
 441  *           anon_mmap_aligned
 442  *
 443  * Create an anonymous mapping aligned to the allocation granularity.
 444  */
 445 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
 446 {
 447     void *ptr;
 448     unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
 449
 450     if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
 451     {
 452         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
 453          * Platform Differences":
 454          * Windows NT: ERROR_INVALID_PARAMETER
 455          * Windows 95: ERROR_INVALID_ADDRESS.
 456          */
 457         if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
 458         else
 459         {
 460             if (GetVersion() & 0x80000000)  /* win95 */
 461                 SetLastError( ERROR_INVALID_ADDRESS );
 462             else
 463                 SetLastError( ERROR_INVALID_PARAMETER );
 464         }
 465         return ptr;
 466     }
 467
 468     if (!base)
 469     {
 470         /* Release the extra memory while keeping the range
 471          * starting on the granularity boundary. */
 472         if ((unsigned int)ptr & granularity_mask)
 473         {
 474             unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
 475             munmap( ptr, extra );
 476             ptr = (char *)ptr + extra;
 477             view_size -= extra;
 478         }
 479         if (view_size > size)
 480             munmap( (char *)ptr + size, view_size - size );
 481     }
 482     else if (ptr != base)
 483     {
 484         /* We couldn't get the address we wanted */
 485         munmap( ptr, view_size );
 486         SetLastError( ERROR_INVALID_ADDRESS );
 487         ptr = (void *)-1;
 488     }
 489     return ptr;
 490 }
 491
 492
 493 /***********************************************************************
 494  *           map_image
 495  *
 496  * Map an executable (PE format) image into memory.
 497  */
 498 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 499                          DWORD header_size, HANDLE shared_file, DWORD shared_size,
 500                          BOOL removable )
 501 {
 502     IMAGE_DOS_HEADER *dos;
 503     IMAGE_NT_HEADERS *nt;
 504     IMAGE_SECTION_HEADER *sec;
 505     IMAGE_DATA_DIRECTORY *imports;
 506     int i, pos;
 507     DWORD err = GetLastError();
 508     FILE_VIEW *view;
 509     char *ptr;
 510     int shared_fd = -1;
 511
 512     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 513
 514     /* zero-map the whole range */
 515
 516     if ((ptr = wine_anon_mmap( base, total_size,
 517                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 518     {
 519         ptr = wine_anon_mmap( NULL, total_size,
 520                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 521         if (ptr == (char *)-1)
 522         {
 523             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 524             goto error;
 525         }
 526     }
 527     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 528
 529     /* map the header */
 530
 531     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 532                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 533     dos = (IMAGE_DOS_HEADER *)ptr;
 534     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 535     if ((char *)(nt + 1) > ptr + header_size) goto error;
 536
 537     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 538     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 539
 540     imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
 541     if (!imports->Size || !imports->VirtualAddress) imports = NULL;
 542
 543     /* check the architecture */
 544
 545     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 546     {
 547         MESSAGE("Trying to load PE image for unsupported architecture (");
 548         switch (nt->FileHeader.Machine)
 549         {
 550         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 551         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 552         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 553         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 554         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 555         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 556         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 557         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 558         }
 559         MESSAGE(")\n");
 560         goto error;
 561     }
 562
 563     /* retrieve the shared sections file */
 564
 565     if (shared_size)
 566     {
 567         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 568         CloseHandle( shared_file );  /* we no longer need it */
 569         shared_file = 0;
 570     }
 571
 572     /* map all the sections */
 573
 574     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 575     {
 576         DWORD size;
 577
 578         /* a few sanity checks */
 579         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 580         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 581         {
 582             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 583                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 584             goto error;
 585         }
 586
 587         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 588             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 589         {
 590             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 591             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 592                           sec->Name, ptr + sec->VirtualAddress,
 593                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 594                           size, sec->Characteristics );
 595             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 596                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 597                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 598             {
 599                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 600                 goto error;
 601             }
 602
 603             /* check if the import directory falls inside this section */
 604             if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 605                 imports->VirtualAddress < sec->VirtualAddress + size)
 606             {
 607                 DWORD base = imports->VirtualAddress & ~page_mask;
 608                 DWORD end = imports->VirtualAddress + ROUND_SIZE( imports->VirtualAddress,
 609                                                                   imports->Size );
 610                 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
 611                 if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
 612                                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 613                                               MAP_PRIVATE|MAP_FIXED, NULL );
 614             }
 615             pos += size;
 616             continue;
 617         }
 618
 619         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 620         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 621
 622         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 623                         sec->Name, ptr + sec->VirtualAddress,
 624                         sec->PointerToRawData, sec->SizeOfRawData,
 625                         sec->Characteristics );
 626
 627         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 628          *       fall back to read(), so we don't need to check anything here.
 629          */
 630         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 631                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 632                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 633         {
 634             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 635             goto error;
 636         }
 637
 638         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 639         {
 640             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 641             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 642             TRACE_(module)("clearing %p - %p\n",
 643                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 644                            ptr + sec->VirtualAddress + end );
 645             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 646                     end - sec->SizeOfRawData );
 647         }
 648     }
 649
 650     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 651     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
 652                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 653                                      hmapping )))
 654     {
 655         SetLastError( ERROR_OUTOFMEMORY );
 656         goto error;
 657     }
 658
 659     SetLastError( err );  /* restore last error */
 660     close( fd );
 661     if (shared_fd != -1) close( shared_fd );
 662     return ptr;
 663
 664  error:
 665     if (ptr != (char *)-1) munmap( ptr, total_size );
 666     close( fd );
 667     if (shared_fd != -1) close( shared_fd );
 668     if (shared_file) CloseHandle( shared_file );
 669     return NULL;
 670 }
 671
 672
 673 /***********************************************************************
 674  *           VIRTUAL_Init
 675  */
 676 #ifndef page_mask
 677 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 678 {
 679     page_size = getpagesize();
 680     page_mask = page_size - 1;
 681     /* Make sure we have a power of 2 */
 682     assert( !(page_size & page_mask) );
 683     page_shift = 0;
 684     while ((1 << page_shift) != page_size) page_shift++;
 685 }
 686 #endif  /* page_mask */
 687
 688
 689 /***********************************************************************
 690  *           VIRTUAL_SetFaultHandler
 691  */
 692 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 693 {
 694     FILE_VIEW *view;
 695
 696     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 697     view->handlerProc = proc;
 698     view->handlerArg  = arg;
 699     return TRUE;
 700 }
 701
 702 /***********************************************************************
 703  *           VIRTUAL_HandleFault
 704  */
 705 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 706 {
 707     FILE_VIEW *view = VIRTUAL_FindView( addr );
 708     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 709
 710     if (view)
 711     {
 712         if (view->handlerProc)
 713         {
 714             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 715         }
 716         else
 717         {
 718             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 719             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 720             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 721             if (vprot & VPROT_GUARD)
 722             {
 723                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 724                 ret = STATUS_GUARD_PAGE_VIOLATION;
 725             }
 726             /* is it inside the stack guard pages? */
 727             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 728                 ret = STATUS_STACK_OVERFLOW;
 729         }
 730     }
 731     return ret;
 732 }
 733
 734
 735
 736 /***********************************************************************
 737  *           unaligned_mmap
 738  *
 739  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 740  * long as the offset is aligned to the filesystem block size. This is
 741  * a big performance gain so we want to take advantage of it.
 742  *
 743  * However, when we use 64-bit file support this doesn't work because
 744  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 745  * in that it rounds unaligned offsets down to a page boundary. For
 746  * these reasons we do a direct system call here.
 747  */
 748 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 749                              unsigned int flags, int fd, unsigned int offset_low,
 750                              unsigned int offset_high )
 751 {
 752 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 753     if (!offset_high && (offset_low & page_mask))
 754     {
 755         int ret;
 756         __asm__ __volatile__("push %%ebx\n\t"
 757                              "movl %2,%%ebx\n\t"
 758                              "int $0x80\n\t"
 759                              "popl %%ebx"
 760                              : "=a" (ret)
 761                              : "0" (90), /* SYS_mmap */
 762                                "g" (&addr) );
 763         if (ret < 0 && ret > -4096)
 764         {
 765             errno = -ret;
 766             ret = -1;
 767         }
 768         return (void *)ret;
 769     }
 770 #endif
 771     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 772 }
 773
 774
 775 /***********************************************************************
 776  *           VIRTUAL_mmap
 777  *
 778  * Wrapper for mmap() that handles anonymous mappings portably,
 779  * and falls back to read if mmap of a file fails.
 780  */
 781 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 782                             DWORD offset_low, DWORD offset_high,
 783                             int prot, int flags, BOOL *removable )
 784 {
 785     int pos;
 786     LPVOID ret;
 787     off_t offset;
 788     BOOL is_shared_write = FALSE;
 789
 790     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 791
 792     if (prot & PROT_WRITE)
 793     {
 794 #ifdef MAP_SHARED
 795         if (flags & MAP_SHARED) is_shared_write = TRUE;
 796 #endif
 797 #ifdef MAP_PRIVATE
 798         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 799 #endif
 800     }
 801
 802     if (removable && *removable)
 803     {
 804         /* if on removable media, try using read instead of mmap */
 805         if (!is_shared_write) goto fake_mmap;
 806         *removable = FALSE;
 807     }
 808
 809     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 810                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 811
 812     /* mmap() failed; if this is because the file offset is not    */
 813     /* page-aligned (EINVAL), or because the underlying filesystem */
 814     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 815
 816     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 817     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 818
 819  fake_mmap:
 820     /* Reserve the memory with an anonymous mmap */
 821     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 822     if (ret == (LPVOID)-1) return ret;
 823     /* Now read in the file */
 824     offset = ((off_t)offset_high << 32) | offset_low;
 825     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 826     {
 827         munmap( ret, size );
 828         return (LPVOID)-1;
 829     }
 830     read( fd, ret, size );
 831     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 832     mprotect( ret, size, prot );  /* Set the right protection */
 833     return ret;
 834 }
 835
 836
 837 /***********************************************************************
 838  *             VirtualAlloc   (KERNEL32.@)
 839  * Reserves or commits a region of pages in virtual address space
 840  *
 841  * RETURNS
 842  *      Base address of allocated region of pages
 843  *      NULL: Failure
 844  */
 845 LPVOID WINAPI VirtualAlloc(
 846               LPVOID addr,  /* [in] Address of region to reserve or commit */
 847               DWORD size,   /* [in] Size of region */
 848               DWORD type,   /* [in] Type of allocation */
 849               DWORD protect)/* [in] Type of access protection */
 850 {
 851     FILE_VIEW *view;
 852     char *ptr, *base;
 853     BYTE vprot;
 854
 855     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 856
 857     /* Round parameters to a page boundary */
 858
 859     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 860     {
 861         SetLastError( ERROR_OUTOFMEMORY );
 862         return NULL;
 863     }
 864     if (addr)
 865     {
 866         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 867             base = ROUND_ADDR( addr, granularity_mask );
 868         else
 869             base = ROUND_ADDR( addr, page_mask );
 870         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
 871         if ((base <= (char *)granularity_mask) || (base + size < base))
 872         {
 873             /* disallow low 64k and wrap-around */
 874             SetLastError( ERROR_INVALID_PARAMETER );
 875             return NULL;
 876         }
 877     }
 878     else
 879     {
 880         base = 0;
 881         size = (size + page_mask) & ~page_mask;
 882     }
 883
 884     if (type & MEM_TOP_DOWN) {
 885         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 886          *        Is there _ANY_ way to do it with UNIX mmap()?
 887          */
 888         WARN("MEM_TOP_DOWN ignored\n");
 889         type &= ~MEM_TOP_DOWN;
 890     }
 891     /* Compute the alloc type flags */
 892
 893     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 894         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 895     {
 896         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 897         SetLastError( ERROR_INVALID_PARAMETER );
 898         return NULL;
 899     }
 900     if (type & (MEM_COMMIT | MEM_SYSTEM))
 901         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 902     else vprot = 0;
 903
 904     /* Reserve the memory */
 905
 906     if ((type & MEM_RESERVE) || !base)
 907     {
 908         if (type & MEM_SYSTEM)
 909         {
 910             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
 911             {
 912                 SetLastError( ERROR_OUTOFMEMORY );
 913                 return NULL;
 914             }
 915             return (LPVOID)base;
 916         }
 917         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
 918         if (ptr == (void *)-1) return NULL;
 919
 920         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
 921         {
 922             munmap( ptr, size );
 923             SetLastError( ERROR_OUTOFMEMORY );
 924             return NULL;
 925         }
 926         return ptr;
 927     }
 928
 929     /* Commit the pages */
 930
 931     if (!(view = VIRTUAL_FindView( base )) ||
 932         (base + size > (char *)view->base + view->size))
 933     {
 934         SetLastError( ERROR_INVALID_ADDRESS );
 935         return NULL;
 936     }
 937
 938     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 939     return (LPVOID)base;
 940 }
 941
 942
 943 /***********************************************************************
 944  *             VirtualAllocEx   (KERNEL32.@)
 945  *
 946  * Seems to be just as VirtualAlloc, but with process handle.
 947  */
 948 LPVOID WINAPI VirtualAllocEx(
 949               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 950               LPVOID addr,  /* [in] Address of region to reserve or commit */
 951               DWORD size,   /* [in] Size of region */
 952               DWORD type,   /* [in] Type of allocation */
 953               DWORD protect /* [in] Type of access protection */
 954 ) {
 955     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 956         return VirtualAlloc( addr, size, type, protect );
 957     ERR("Unsupported on other process\n");
 958     return NULL;
 959 }
 960
 961
 962 /***********************************************************************
 963  *             VirtualFree   (KERNEL32.@)
 964  * Release or decommits a region of pages in virtual address space.
 965  *
 966  * RETURNS
 967  *      TRUE: Success
 968  *      FALSE: Failure
 969  */
 970 BOOL WINAPI VirtualFree(
 971               LPVOID addr, /* [in] Address of region of committed pages */
 972               DWORD size,  /* [in] Size of region */
 973               DWORD type   /* [in] Type of operation */
 974 ) {
 975     FILE_VIEW *view;
 976     char *base;
 977
 978     TRACE("%p %08lx %lx\n", addr, size, type );
 979
 980     /* Fix the parameters */
 981
 982     size = ROUND_SIZE( addr, size );
 983     base = ROUND_ADDR( addr, page_mask );
 984
 985     if (!(view = VIRTUAL_FindView( base )) ||
 986         (base + size > (char *)view->base + view->size) ||
 987         !(view->flags & VFLAG_VALLOC))
 988     {
 989         SetLastError( ERROR_INVALID_PARAMETER );
 990         return FALSE;
 991     }
 992
 993     /* Check the type */
 994
 995     if (type & MEM_SYSTEM)
 996     {
 997         view->flags |= VFLAG_SYSTEM;
 998         type &= ~MEM_SYSTEM;
 999     }
1000
1001     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
1002     {
1003         ERR("called with wrong free type flags (%08lx) !\n", type);
1004         SetLastError( ERROR_INVALID_PARAMETER );
1005         return FALSE;
1006     }
1007
1008     /* Free the pages */
1009
1010     if (type == MEM_RELEASE)
1011     {
1012         if (size || (base != view->base))
1013         {
1014             SetLastError( ERROR_INVALID_PARAMETER );
1015             return FALSE;
1016         }
1017         VIRTUAL_DeleteView( view );
1018         return TRUE;
1019     }
1020
1021     /* Decommit the pages by remapping zero-pages instead */
1022
1023     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1024         ERR( "Could not remap pages, expect trouble\n" );
1025     return VIRTUAL_SetProt( view, base, size, 0 );
1026 }
1027
1028
1029 /***********************************************************************
1030  *             VirtualLock   (KERNEL32.@)
1031  * Locks the specified region of virtual address space
1032  *
1033  * NOTE
1034  *      Always returns TRUE
1035  *
1036  * RETURNS
1037  *      TRUE: Success
1038  *      FALSE: Failure
1039  */
1040 BOOL WINAPI VirtualLock(
1041               LPVOID addr, /* [in] Address of first byte of range to lock */
1042               DWORD size   /* [in] Number of bytes in range to lock */
1043 ) {
1044     return TRUE;
1045 }
1046
1047
1048 /***********************************************************************
1049  *             VirtualUnlock   (KERNEL32.@)
1050  * Unlocks a range of pages in the virtual address space
1051  *
1052  * NOTE
1053  *      Always returns TRUE
1054  *
1055  * RETURNS
1056  *      TRUE: Success
1057  *      FALSE: Failure
1058  */
1059 BOOL WINAPI VirtualUnlock(
1060               LPVOID addr, /* [in] Address of first byte of range */
1061               DWORD size   /* [in] Number of bytes in range */
1062 ) {
1063     return TRUE;
1064 }
1065
1066
1067 /***********************************************************************
1068  *             VirtualProtect   (KERNEL32.@)
1069  * Changes the access protection on a region of committed pages
1070  *
1071  * RETURNS
1072  *      TRUE: Success
1073  *      FALSE: Failure
1074  */
1075 BOOL WINAPI VirtualProtect(
1076               LPVOID addr,     /* [in] Address of region of committed pages */
1077               DWORD size,      /* [in] Size of region */
1078               DWORD new_prot,  /* [in] Desired access protection */
1079               LPDWORD old_prot /* [out] Address of variable to get old protection */
1080 ) {
1081     FILE_VIEW *view;
1082     char *base;
1083     UINT i;
1084     BYTE vprot, *p;
1085     DWORD prot;
1086
1087     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1088
1089     /* Fix the parameters */
1090
1091     size = ROUND_SIZE( addr, size );
1092     base = ROUND_ADDR( addr, page_mask );
1093
1094     if (!(view = VIRTUAL_FindView( base )) ||
1095         (base + size > (char *)view->base + view->size))
1096     {
1097         SetLastError( ERROR_INVALID_PARAMETER );
1098         return FALSE;
1099     }
1100
1101     /* Make sure all the pages are committed */
1102
1103     p = view->prot + ((base - (char *)view->base) >> page_shift);
1104     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1105     for (i = size >> page_shift; i; i--, p++)
1106     {
1107         if (!(*p & VPROT_COMMITTED))
1108         {
1109             SetLastError( ERROR_INVALID_PARAMETER );
1110             return FALSE;
1111         }
1112     }
1113
1114     if (old_prot) *old_prot = prot;
1115     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1116     return VIRTUAL_SetProt( view, base, size, vprot );
1117 }
1118
1119
1120 /***********************************************************************
1121  *             VirtualProtectEx   (KERNEL32.@)
1122  * Changes the access protection on a region of committed pages in the
1123  * virtual address space of a specified process
1124  *
1125  * RETURNS
1126  *      TRUE: Success
1127  *      FALSE: Failure
1128  */
1129 BOOL WINAPI VirtualProtectEx(
1130               HANDLE handle, /* [in]  Handle of process */
1131               LPVOID addr,     /* [in]  Address of region of committed pages */
1132               DWORD size,      /* [in]  Size of region */
1133               DWORD new_prot,  /* [in]  Desired access protection */
1134               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1135 {
1136     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1137         return VirtualProtect( addr, size, new_prot, old_prot );
1138     ERR("Unsupported on other process\n");
1139     return FALSE;
1140 }
1141
1142
1143 /***********************************************************************
1144  *             VirtualQuery   (KERNEL32.@)
1145  * Provides info about a range of pages in virtual address space
1146  *
1147  * RETURNS
1148  *      Number of bytes returned in information buffer
1149  *      or 0 if addr is >= 0xc0000000 (kernel space).
1150  */
1151 DWORD WINAPI VirtualQuery(
1152              LPCVOID addr,                    /* [in]  Address of region */
1153              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1154              DWORD len                        /* [in]  Size of buffer */
1155 ) {
1156     FILE_VIEW *view;
1157     char *base, *alloc_base = 0;
1158     UINT size = 0;
1159
1160     if (addr >= (void*)0xc0000000) return 0;
1161
1162     base = ROUND_ADDR( addr, page_mask );
1163
1164     /* Find the view containing the address */
1165
1166     EnterCriticalSection(&csVirtual);
1167     view = VIRTUAL_FirstView;
1168     for (;;)
1169     {
1170         if (!view)
1171         {
1172             size = (char *)0xffff0000 - alloc_base;
1173             break;
1174         }
1175         if ((char *)view->base > base)
1176         {
1177             size = (char *)view->base - alloc_base;
1178             view = NULL;
1179             break;
1180         }
1181         if ((char *)view->base + view->size > base)
1182         {
1183             alloc_base = view->base;
1184             size = view->size;
1185             break;
1186         }
1187         alloc_base = (char *)view->base + view->size;
1188         view = view->next;
1189     }
1190     LeaveCriticalSection(&csVirtual);
1191
1192     /* Fill the info structure */
1193
1194     if (!view)
1195     {
1196         info->State             = MEM_FREE;
1197         info->Protect           = 0;
1198         info->AllocationProtect = 0;
1199         info->Type              = 0;
1200     }
1201     else
1202     {
1203         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1204         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1205         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1206             if (view->prot[size >> page_shift] != vprot) break;
1207         info->AllocationProtect = view->protect;
1208         info->Type              = MEM_PRIVATE;  /* FIXME */
1209     }
1210
1211     info->BaseAddress    = (LPVOID)base;
1212     info->AllocationBase = (LPVOID)alloc_base;
1213     info->RegionSize     = size - (base - alloc_base);
1214     return sizeof(*info);
1215 }
1216
1217
1218 /***********************************************************************
1219  *             VirtualQueryEx   (KERNEL32.@)
1220  * Provides info about a range of pages in virtual address space of a
1221  * specified process
1222  *
1223  * RETURNS
1224  *      Number of bytes returned in information buffer
1225  */
1226 DWORD WINAPI VirtualQueryEx(
1227              HANDLE handle,                 /* [in] Handle of process */
1228              LPCVOID addr,                    /* [in] Address of region */
1229              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1230              DWORD len                        /* [in] Size of buffer */ )
1231 {
1232     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1233         return VirtualQuery( addr, info, len );
1234     ERR("Unsupported on other process\n");
1235     return 0;
1236 }
1237
1238
1239 /***********************************************************************
1240  *             IsBadReadPtr   (KERNEL32.@)
1241  *
1242  * RETURNS
1243  *      FALSE: Process has read access to entire block
1244  *      TRUE: Otherwise
1245  */
1246 BOOL WINAPI IsBadReadPtr(
1247               LPCVOID ptr, /* [in] Address of memory block */
1248               UINT size )  /* [in] Size of block */
1249 {
1250     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1251     __TRY
1252     {
1253         volatile const char *p = ptr;
1254         char dummy;
1255         UINT count = size;
1256
1257         while (count > page_size)
1258         {
1259             dummy = *p;
1260             p += page_size;
1261             count -= page_size;
1262         }
1263         dummy = p[0];
1264         dummy = p[count - 1];
1265     }
1266     __EXCEPT(page_fault) { return TRUE; }
1267     __ENDTRY
1268     return FALSE;
1269 }
1270
1271
1272 /***********************************************************************
1273  *             IsBadWritePtr   (KERNEL32.@)
1274  *
1275  * RETURNS
1276  *      FALSE: Process has write access to entire block
1277  *      TRUE: Otherwise
1278  */
1279 BOOL WINAPI IsBadWritePtr(
1280               LPVOID ptr, /* [in] Address of memory block */
1281               UINT size ) /* [in] Size of block in bytes */
1282 {
1283     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1284     __TRY
1285     {
1286         volatile char *p = ptr;
1287         UINT count = size;
1288
1289         while (count > page_size)
1290         {
1291             *p |= 0;
1292             p += page_size;
1293             count -= page_size;
1294         }
1295         p[0] |= 0;
1296         p[count - 1] |= 0;
1297     }
1298     __EXCEPT(page_fault) { return TRUE; }
1299     __ENDTRY
1300     return FALSE;
1301 }
1302
1303
1304 /***********************************************************************
1305  *             IsBadHugeReadPtr   (KERNEL32.@)
1306  * RETURNS
1307  *      FALSE: Process has read access to entire block
1308  *      TRUE: Otherwise
1309  */
1310 BOOL WINAPI IsBadHugeReadPtr(
1311               LPCVOID ptr, /* [in] Address of memory block */
1312               UINT size  /* [in] Size of block */
1313 ) {
1314     return IsBadReadPtr( ptr, size );
1315 }
1316
1317
1318 /***********************************************************************
1319  *             IsBadHugeWritePtr   (KERNEL32.@)
1320  * RETURNS
1321  *      FALSE: Process has write access to entire block
1322  *      TRUE: Otherwise
1323  */
1324 BOOL WINAPI IsBadHugeWritePtr(
1325               LPVOID ptr, /* [in] Address of memory block */
1326               UINT size /* [in] Size of block */
1327 ) {
1328     return IsBadWritePtr( ptr, size );
1329 }
1330
1331
1332 /***********************************************************************
1333  *             IsBadCodePtr   (KERNEL32.@)
1334  *
1335  * RETURNS
1336  *      FALSE: Process has read access to specified memory
1337  *      TRUE: Otherwise
1338  */
1339 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1340 {
1341     return IsBadReadPtr( ptr, 1 );
1342 }
1343
1344
1345 /***********************************************************************
1346  *             IsBadStringPtrA   (KERNEL32.@)
1347  *
1348  * RETURNS
1349  *      FALSE: Read access to all bytes in string
1350  *      TRUE: Else
1351  */
1352 BOOL WINAPI IsBadStringPtrA(
1353               LPCSTR str, /* [in] Address of string */
1354               UINT max )  /* [in] Maximum size of string */
1355 {
1356     __TRY
1357     {
1358         volatile const char *p = str;
1359         while (p != str + max) if (!*p++) break;
1360     }
1361     __EXCEPT(page_fault) { return TRUE; }
1362     __ENDTRY
1363     return FALSE;
1364 }
1365
1366
1367 /***********************************************************************
1368  *             IsBadStringPtrW   (KERNEL32.@)
1369  * See IsBadStringPtrA
1370  */
1371 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1372 {
1373     __TRY
1374     {
1375         volatile const WCHAR *p = str;
1376         while (p != str + max) if (!*p++) break;
1377     }
1378     __EXCEPT(page_fault) { return TRUE; }
1379     __ENDTRY
1380     return FALSE;
1381 }
1382
1383
1384 /***********************************************************************
1385  *             CreateFileMappingA   (KERNEL32.@)
1386  * Creates a named or unnamed file-mapping object for the specified file
1387  *
1388  * RETURNS
1389  *      Handle: Success
1390  *      0: Mapping object does not exist
1391  *      NULL: Failure
1392  */
1393 HANDLE WINAPI CreateFileMappingA(
1394                 HANDLE hFile,   /* [in] Handle of file to map */
1395                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1396                 DWORD protect,   /* [in] Protection for mapping object */
1397                 DWORD size_high, /* [in] High-order 32 bits of object size */
1398                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1399                 LPCSTR name      /* [in] Name of file-mapping object */ )
1400 {
1401     WCHAR buffer[MAX_PATH];
1402
1403     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1404
1405     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1406     {
1407         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1408         return 0;
1409     }
1410     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1411 }
1412
1413
1414 /***********************************************************************
1415  *             CreateFileMappingW   (KERNEL32.@)
1416  * See CreateFileMappingA
1417  */
1418 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1419                                   DWORD protect, DWORD size_high,
1420                                   DWORD size_low, LPCWSTR name )
1421 {
1422     HANDLE ret;
1423     BYTE vprot;
1424     DWORD len = name ? strlenW(name) : 0;
1425
1426     /* Check parameters */
1427
1428     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1429           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1430
1431     if (len > MAX_PATH)
1432     {
1433         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1434         return 0;
1435     }
1436
1437     vprot = VIRTUAL_GetProt( protect );
1438     if (protect & SEC_RESERVE)
1439     {
1440         if (hFile != INVALID_HANDLE_VALUE)
1441         {
1442             SetLastError( ERROR_INVALID_PARAMETER );
1443             return 0;
1444         }
1445     }
1446     else vprot |= VPROT_COMMITTED;
1447     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1448     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1449
1450     /* Create the server object */
1451
1452     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1453     SERVER_START_REQ( create_mapping )
1454     {
1455         req->file_handle = hFile;
1456         req->size_high   = size_high;
1457         req->size_low    = size_low;
1458         req->protect     = vprot;
1459         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1460         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1461         SetLastError(0);
1462         wine_server_call_err( req );
1463         ret = reply->handle;
1464     }
1465     SERVER_END_REQ;
1466     return ret;
1467 }
1468
1469
1470 /***********************************************************************
1471  *             OpenFileMappingA   (KERNEL32.@)
1472  * Opens a named file-mapping object.
1473  *
1474  * RETURNS
1475  *      Handle: Success
1476  *      NULL: Failure
1477  */
1478 HANDLE WINAPI OpenFileMappingA(
1479                 DWORD access,   /* [in] Access mode */
1480                 BOOL inherit, /* [in] Inherit flag */
1481                 LPCSTR name )   /* [in] Name of file-mapping object */
1482 {
1483     WCHAR buffer[MAX_PATH];
1484
1485     if (!name) return OpenFileMappingW( access, inherit, NULL );
1486
1487     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1488     {
1489         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1490         return 0;
1491     }
1492     return OpenFileMappingW( access, inherit, buffer );
1493 }
1494
1495
1496 /***********************************************************************
1497  *             OpenFileMappingW   (KERNEL32.@)
1498  * See OpenFileMappingA
1499  */
1500 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1501 {
1502     HANDLE ret;
1503     DWORD len = name ? strlenW(name) : 0;
1504     if (len >= MAX_PATH)
1505     {
1506         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1507         return 0;
1508     }
1509     SERVER_START_REQ( open_mapping )
1510     {
1511         req->access  = access;
1512         req->inherit = inherit;
1513         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1514         wine_server_call_err( req );
1515         ret = reply->handle;
1516     }
1517     SERVER_END_REQ;
1518     return ret;
1519 }
1520
1521
1522 /***********************************************************************
1523  *             MapViewOfFile   (KERNEL32.@)
1524  * Maps a view of a file into the address space
1525  *
1526  * RETURNS
1527  *      Starting address of mapped view
1528  *      NULL: Failure
1529  */
1530 LPVOID WINAPI MapViewOfFile(
1531               HANDLE mapping,  /* [in] File-mapping object to map */
1532               DWORD access,      /* [in] Access mode */
1533               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1534               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1535               DWORD count        /* [in] Number of bytes to map */
1536 ) {
1537     return MapViewOfFileEx( mapping, access, offset_high,
1538                             offset_low, count, NULL );
1539 }
1540
1541
1542 /***********************************************************************
1543  *             MapViewOfFileEx   (KERNEL32.@)
1544  * Maps a view of a file into the address space
1545  *
1546  * RETURNS
1547  *      Starting address of mapped view
1548  *      NULL: Failure
1549  */
1550 LPVOID WINAPI MapViewOfFileEx(
1551               HANDLE handle,   /* [in] File-mapping object to map */
1552               DWORD access,      /* [in] Access mode */
1553               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1554               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1555               DWORD count,       /* [in] Number of bytes to map */
1556               LPVOID addr        /* [in] Suggested starting address for mapped view */
1557 ) {
1558     FILE_VIEW *view;
1559     UINT size = 0;
1560     int flags = MAP_PRIVATE;
1561     int unix_handle = -1;
1562     int prot, res;
1563     void *base, *ptr = (void *)-1, *ret;
1564     DWORD size_low, size_high, header_size, shared_size;
1565     HANDLE shared_file;
1566     BOOL removable;
1567
1568     /* Check parameters */
1569
1570     if ((offset_low & granularity_mask) ||
1571         (addr && ((UINT_PTR)addr & granularity_mask)))
1572     {
1573         SetLastError( ERROR_INVALID_PARAMETER );
1574         return NULL;
1575     }
1576
1577     SERVER_START_REQ( get_mapping_info )
1578     {
1579         req->handle = handle;
1580         res = wine_server_call_err( req );
1581         prot        = reply->protect;
1582         base        = reply->base;
1583         size_low    = reply->size_low;
1584         size_high   = reply->size_high;
1585         header_size = reply->header_size;
1586         shared_file = reply->shared_file;
1587         shared_size = reply->shared_size;
1588         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1589                        reply->drive_type == DRIVE_CDROM);
1590     }
1591     SERVER_END_REQ;
1592     if (res) goto error;
1593
1594     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1595
1596     if (prot & VPROT_IMAGE)
1597         return map_image( handle, unix_handle, base, size_low, header_size,
1598                           shared_file, shared_size, removable );
1599
1600
1601     if (size_high)
1602         ERR("Sizes larger than 4Gb not supported\n");
1603
1604     if ((offset_low >= size_low) ||
1605         (count > size_low - offset_low))
1606     {
1607         SetLastError( ERROR_INVALID_PARAMETER );
1608         goto error;
1609     }
1610     if (count) size = ROUND_SIZE( offset_low, count );
1611     else size = size_low - offset_low;
1612
1613     switch(access)
1614     {
1615     case FILE_MAP_ALL_ACCESS:
1616     case FILE_MAP_WRITE:
1617     case FILE_MAP_WRITE | FILE_MAP_READ:
1618         if (!(prot & VPROT_WRITE))
1619         {
1620             SetLastError( ERROR_INVALID_PARAMETER );
1621             goto error;
1622         }
1623         flags = MAP_SHARED;
1624         /* fall through */
1625     case FILE_MAP_READ:
1626     case FILE_MAP_COPY:
1627     case FILE_MAP_COPY | FILE_MAP_READ:
1628         if (prot & VPROT_READ) break;
1629         /* fall through */
1630     default:
1631         SetLastError( ERROR_INVALID_PARAMETER );
1632         goto error;
1633     }
1634
1635     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1636      * which has a view of this mapping commits some pages, they will
1637      * appear commited in all other processes, which have the same
1638      * view created. Since we don`t support this yet, we create the
1639      * whole mapping commited.
1640      */
1641     prot |= VPROT_COMMITTED;
1642
1643     /* Reserve a properly aligned area */
1644
1645     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1646
1647     /* Map the file */
1648
1649     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1650
1651     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1652                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1653     if (ret != ptr)
1654     {
1655         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1656         goto error;
1657     }
1658     if (removable) handle = 0;  /* don't keep handle open on removable media */
1659
1660     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1661     {
1662         SetLastError( ERROR_OUTOFMEMORY );
1663         goto error;
1664     }
1665     if (unix_handle != -1) close( unix_handle );
1666     return ptr;
1667
1668 error:
1669     if (unix_handle != -1) close( unix_handle );
1670     if (ptr != (void *)-1) munmap( ptr, size );
1671     return NULL;
1672 }
1673
1674
1675 /***********************************************************************
1676  *             FlushViewOfFile   (KERNEL32.@)
1677  * Writes to the disk a byte range within a mapped view of a file
1678  *
1679  * RETURNS
1680  *      TRUE: Success
1681  *      FALSE: Failure
1682  */
1683 BOOL WINAPI FlushViewOfFile(
1684               LPCVOID base, /* [in] Start address of byte range to flush */
1685               DWORD cbFlush /* [in] Number of bytes in range */
1686 ) {
1687     FILE_VIEW *view;
1688     void *addr = ROUND_ADDR( base, page_mask );
1689
1690     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1691                      base, cbFlush );
1692
1693     if (!(view = VIRTUAL_FindView( addr )))
1694     {
1695         SetLastError( ERROR_INVALID_PARAMETER );
1696         return FALSE;
1697     }
1698     if (!cbFlush) cbFlush = view->size;
1699     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1700     SetLastError( ERROR_INVALID_PARAMETER );
1701     return FALSE;
1702 }
1703
1704
1705 /***********************************************************************
1706  *             UnmapViewOfFile   (KERNEL32.@)
1707  * Unmaps a mapped view of a file.
1708  *
1709  * NOTES
1710  *      Should addr be an LPCVOID?
1711  *
1712  * RETURNS
1713  *      TRUE: Success
1714  *      FALSE: Failure
1715  */
1716 BOOL WINAPI UnmapViewOfFile(
1717               LPVOID addr /* [in] Address where mapped view begins */
1718 ) {
1719     FILE_VIEW *view;
1720     void *base = ROUND_ADDR( addr, page_mask );
1721     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1722     {
1723         SetLastError( ERROR_INVALID_PARAMETER );
1724         return FALSE;
1725     }
1726     VIRTUAL_DeleteView( view );
1727     return TRUE;
1728 }