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 ((char*)view->base + view->size > (char*)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 (base < (char *)0x110000) base = 0;  /* make sure the DOS area remains free */
 517     if ((ptr = wine_anon_mmap( base, total_size,
 518                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 519     {
 520         ptr = wine_anon_mmap( NULL, total_size,
 521                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 522         if (ptr == (char *)-1)
 523         {
 524             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 525             goto error;
 526         }
 527     }
 528     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 529
 530     /* map the header */
 531
 532     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 533                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 534     dos = (IMAGE_DOS_HEADER *)ptr;
 535     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 536     if ((char *)(nt + 1) > ptr + header_size) goto error;
 537
 538     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 539     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 540
 541     imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
 542     if (!imports->Size || !imports->VirtualAddress) imports = NULL;
 543
 544     /* check the architecture */
 545
 546     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 547     {
 548         MESSAGE("Trying to load PE image for unsupported architecture (");
 549         switch (nt->FileHeader.Machine)
 550         {
 551         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 552         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 553         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 554         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 555         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 556         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 557         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 558         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 559         }
 560         MESSAGE(")\n");
 561         goto error;
 562     }
 563
 564     /* retrieve the shared sections file */
 565
 566     if (shared_size)
 567     {
 568         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 569         CloseHandle( shared_file );  /* we no longer need it */
 570         shared_file = 0;
 571     }
 572
 573     /* map all the sections */
 574
 575     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 576     {
 577         DWORD size;
 578
 579         /* a few sanity checks */
 580         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 581         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 582         {
 583             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 584                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 585             goto error;
 586         }
 587
 588         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 589             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 590         {
 591             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 592             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 593                           sec->Name, ptr + sec->VirtualAddress,
 594                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 595                           size, sec->Characteristics );
 596             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 597                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 598                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 599             {
 600                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 601                 goto error;
 602             }
 603
 604             /* check if the import directory falls inside this section */
 605             if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 606                 imports->VirtualAddress < sec->VirtualAddress + size)
 607             {
 608                 DWORD base = imports->VirtualAddress & ~page_mask;
 609                 DWORD end = imports->VirtualAddress + ROUND_SIZE( imports->VirtualAddress,
 610                                                                   imports->Size );
 611                 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
 612                 if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
 613                                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 614                                               MAP_PRIVATE|MAP_FIXED, NULL );
 615             }
 616             pos += size;
 617             continue;
 618         }
 619
 620         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 621         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 622
 623         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 624                         sec->Name, ptr + sec->VirtualAddress,
 625                         sec->PointerToRawData, sec->SizeOfRawData,
 626                         sec->Characteristics );
 627
 628         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 629          *       fall back to read(), so we don't need to check anything here.
 630          */
 631         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 632                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 633                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 634         {
 635             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 636             goto error;
 637         }
 638
 639         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 640         {
 641             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 642             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 643             TRACE_(module)("clearing %p - %p\n",
 644                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 645                            ptr + sec->VirtualAddress + end );
 646             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 647                     end - sec->SizeOfRawData );
 648         }
 649     }
 650
 651     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 652     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
 653                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 654                                      hmapping )))
 655     {
 656         SetLastError( ERROR_OUTOFMEMORY );
 657         goto error;
 658     }
 659
 660     SetLastError( err );  /* restore last error */
 661     close( fd );
 662     if (shared_fd != -1) close( shared_fd );
 663     return ptr;
 664
 665  error:
 666     if (ptr != (char *)-1) munmap( ptr, total_size );
 667     close( fd );
 668     if (shared_fd != -1) close( shared_fd );
 669     if (shared_file) CloseHandle( shared_file );
 670     return NULL;
 671 }
 672
 673
 674 /***********************************************************************
 675  *           VIRTUAL_Init
 676  */
 677 #ifndef page_mask
 678 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 679 {
 680     page_size = getpagesize();
 681     page_mask = page_size - 1;
 682     /* Make sure we have a power of 2 */
 683     assert( !(page_size & page_mask) );
 684     page_shift = 0;
 685     while ((1 << page_shift) != page_size) page_shift++;
 686 }
 687 #endif  /* page_mask */
 688
 689
 690 /***********************************************************************
 691  *           VIRTUAL_SetFaultHandler
 692  */
 693 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 694 {
 695     FILE_VIEW *view;
 696
 697     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 698     view->handlerProc = proc;
 699     view->handlerArg  = arg;
 700     return TRUE;
 701 }
 702
 703 /***********************************************************************
 704  *           VIRTUAL_HandleFault
 705  */
 706 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 707 {
 708     FILE_VIEW *view = VIRTUAL_FindView( addr );
 709     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 710
 711     if (view)
 712     {
 713         if (view->handlerProc)
 714         {
 715             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 716         }
 717         else
 718         {
 719             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 720             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 721             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 722             if (vprot & VPROT_GUARD)
 723             {
 724                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 725                 ret = STATUS_GUARD_PAGE_VIOLATION;
 726             }
 727             /* is it inside the stack guard pages? */
 728             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 729                 ret = STATUS_STACK_OVERFLOW;
 730         }
 731     }
 732     return ret;
 733 }
 734
 735
 736
 737 /***********************************************************************
 738  *           unaligned_mmap
 739  *
 740  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 741  * long as the offset is aligned to the filesystem block size. This is
 742  * a big performance gain so we want to take advantage of it.
 743  *
 744  * However, when we use 64-bit file support this doesn't work because
 745  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 746  * in that it rounds unaligned offsets down to a page boundary. For
 747  * these reasons we do a direct system call here.
 748  */
 749 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 750                              unsigned int flags, int fd, unsigned int offset_low,
 751                              unsigned int offset_high )
 752 {
 753 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 754     if (!offset_high && (offset_low & page_mask))
 755     {
 756         int ret;
 757
 758         struct
 759         {
 760             void        *addr;
 761             unsigned int length;
 762             unsigned int prot;
 763             unsigned int flags;
 764             unsigned int fd;
 765             unsigned int offset;
 766         } args;
 767
 768         args.addr   = addr;
 769         args.length = length;
 770         args.prot   = prot;
 771         args.flags  = flags;
 772         args.fd     = fd;
 773         args.offset = offset_low;
 774
 775         __asm__ __volatile__("push %%ebx\n\t"
 776                              "movl %2,%%ebx\n\t"
 777                              "int $0x80\n\t"
 778                              "popl %%ebx"
 779                              : "=a" (ret)
 780                              : "0" (90), /* SYS_mmap */
 781                                "g" (&args) );
 782         if (ret < 0 && ret > -4096)
 783         {
 784             errno = -ret;
 785             ret = -1;
 786         }
 787         return (void *)ret;
 788     }
 789 #endif
 790     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 791 }
 792
 793
 794 /***********************************************************************
 795  *           VIRTUAL_mmap
 796  *
 797  * Wrapper for mmap() that handles anonymous mappings portably,
 798  * and falls back to read if mmap of a file fails.
 799  */
 800 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 801                             DWORD offset_low, DWORD offset_high,
 802                             int prot, int flags, BOOL *removable )
 803 {
 804     int pos;
 805     LPVOID ret;
 806     off_t offset;
 807     BOOL is_shared_write = FALSE;
 808
 809     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 810
 811     if (prot & PROT_WRITE)
 812     {
 813 #ifdef MAP_SHARED
 814         if (flags & MAP_SHARED) is_shared_write = TRUE;
 815 #endif
 816 #ifdef MAP_PRIVATE
 817         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 818 #endif
 819     }
 820
 821     if (removable && *removable)
 822     {
 823         /* if on removable media, try using read instead of mmap */
 824         if (!is_shared_write) goto fake_mmap;
 825         *removable = FALSE;
 826     }
 827
 828     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 829                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 830
 831     /* mmap() failed; if this is because the file offset is not    */
 832     /* page-aligned (EINVAL), or because the underlying filesystem */
 833     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 834
 835     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 836     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 837
 838  fake_mmap:
 839     /* Reserve the memory with an anonymous mmap */
 840     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 841     if (ret == (LPVOID)-1) return ret;
 842     /* Now read in the file */
 843     offset = ((off_t)offset_high << 32) | offset_low;
 844     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 845     {
 846         munmap( ret, size );
 847         return (LPVOID)-1;
 848     }
 849     read( fd, ret, size );
 850     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 851     mprotect( ret, size, prot );  /* Set the right protection */
 852     return ret;
 853 }
 854
 855
 856 /***********************************************************************
 857  *             VirtualAlloc   (KERNEL32.@)
 858  * Reserves or commits a region of pages in virtual address space
 859  *
 860  * RETURNS
 861  *      Base address of allocated region of pages
 862  *      NULL: Failure
 863  */
 864 LPVOID WINAPI VirtualAlloc(
 865               LPVOID addr,  /* [in] Address of region to reserve or commit */
 866               DWORD size,   /* [in] Size of region */
 867               DWORD type,   /* [in] Type of allocation */
 868               DWORD protect)/* [in] Type of access protection */
 869 {
 870     FILE_VIEW *view;
 871     char *ptr, *base;
 872     BYTE vprot;
 873
 874     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 875
 876     /* Round parameters to a page boundary */
 877
 878     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 879     {
 880         SetLastError( ERROR_OUTOFMEMORY );
 881         return NULL;
 882     }
 883     if (addr)
 884     {
 885         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 886             base = ROUND_ADDR( addr, granularity_mask );
 887         else
 888             base = ROUND_ADDR( addr, page_mask );
 889         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
 890         if ((base <= (char *)granularity_mask) || (base + size < base))
 891         {
 892             /* disallow low 64k and wrap-around */
 893             SetLastError( ERROR_INVALID_PARAMETER );
 894             return NULL;
 895         }
 896     }
 897     else
 898     {
 899         base = 0;
 900         size = (size + page_mask) & ~page_mask;
 901     }
 902
 903     if (type & MEM_TOP_DOWN) {
 904         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 905          *        Is there _ANY_ way to do it with UNIX mmap()?
 906          */
 907         WARN("MEM_TOP_DOWN ignored\n");
 908         type &= ~MEM_TOP_DOWN;
 909     }
 910     /* Compute the alloc type flags */
 911
 912     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 913         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 914     {
 915         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 916         SetLastError( ERROR_INVALID_PARAMETER );
 917         return NULL;
 918     }
 919     if (type & (MEM_COMMIT | MEM_SYSTEM))
 920         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 921     else vprot = 0;
 922
 923     /* Reserve the memory */
 924
 925     if ((type & MEM_RESERVE) || !base)
 926     {
 927         if (type & MEM_SYSTEM)
 928         {
 929             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
 930             {
 931                 SetLastError( ERROR_OUTOFMEMORY );
 932                 return NULL;
 933             }
 934             return (LPVOID)base;
 935         }
 936         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
 937         if (ptr == (void *)-1) return NULL;
 938
 939         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
 940         {
 941             munmap( ptr, size );
 942             SetLastError( ERROR_OUTOFMEMORY );
 943             return NULL;
 944         }
 945         return ptr;
 946     }
 947
 948     /* Commit the pages */
 949
 950     if (!(view = VIRTUAL_FindView( base )) ||
 951         (base + size > (char *)view->base + view->size))
 952     {
 953         SetLastError( ERROR_INVALID_ADDRESS );
 954         return NULL;
 955     }
 956
 957     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 958     return (LPVOID)base;
 959 }
 960
 961
 962 /***********************************************************************
 963  *             VirtualAllocEx   (KERNEL32.@)
 964  *
 965  * Seems to be just as VirtualAlloc, but with process handle.
 966  */
 967 LPVOID WINAPI VirtualAllocEx(
 968               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 969               LPVOID addr,  /* [in] Address of region to reserve or commit */
 970               DWORD size,   /* [in] Size of region */
 971               DWORD type,   /* [in] Type of allocation */
 972               DWORD protect /* [in] Type of access protection */
 973 ) {
 974     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 975         return VirtualAlloc( addr, size, type, protect );
 976     ERR("Unsupported on other process\n");
 977     return NULL;
 978 }
 979
 980
 981 /***********************************************************************
 982  *             VirtualFree   (KERNEL32.@)
 983  * Release or decommits a region of pages in virtual address space.
 984  *
 985  * RETURNS
 986  *      TRUE: Success
 987  *      FALSE: Failure
 988  */
 989 BOOL WINAPI VirtualFree(
 990               LPVOID addr, /* [in] Address of region of committed pages */
 991               DWORD size,  /* [in] Size of region */
 992               DWORD type   /* [in] Type of operation */
 993 ) {
 994     FILE_VIEW *view;
 995     char *base;
 996
 997     TRACE("%p %08lx %lx\n", addr, size, type );
 998
 999     /* Fix the parameters */
1000
1001     size = ROUND_SIZE( addr, size );
1002     base = ROUND_ADDR( addr, page_mask );
1003
1004     if (!(view = VIRTUAL_FindView( base )) ||
1005         (base + size > (char *)view->base + view->size) ||
1006         !(view->flags & VFLAG_VALLOC))
1007     {
1008         SetLastError( ERROR_INVALID_PARAMETER );
1009         return FALSE;
1010     }
1011
1012     /* Check the type */
1013
1014     if (type & MEM_SYSTEM)
1015     {
1016         view->flags |= VFLAG_SYSTEM;
1017         type &= ~MEM_SYSTEM;
1018     }
1019
1020     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
1021     {
1022         ERR("called with wrong free type flags (%08lx) !\n", type);
1023         SetLastError( ERROR_INVALID_PARAMETER );
1024         return FALSE;
1025     }
1026
1027     /* Free the pages */
1028
1029     if (type == MEM_RELEASE)
1030     {
1031         if (size || (base != view->base))
1032         {
1033             SetLastError( ERROR_INVALID_PARAMETER );
1034             return FALSE;
1035         }
1036         VIRTUAL_DeleteView( view );
1037         return TRUE;
1038     }
1039
1040     /* Decommit the pages by remapping zero-pages instead */
1041
1042     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1043         ERR( "Could not remap pages, expect trouble\n" );
1044     return VIRTUAL_SetProt( view, base, size, 0 );
1045 }
1046
1047
1048 /***********************************************************************
1049  *             VirtualLock   (KERNEL32.@)
1050  * Locks the specified region of virtual address space
1051  *
1052  * NOTE
1053  *      Always returns TRUE
1054  *
1055  * RETURNS
1056  *      TRUE: Success
1057  *      FALSE: Failure
1058  */
1059 BOOL WINAPI VirtualLock(
1060               LPVOID addr, /* [in] Address of first byte of range to lock */
1061               DWORD size   /* [in] Number of bytes in range to lock */
1062 ) {
1063     return TRUE;
1064 }
1065
1066
1067 /***********************************************************************
1068  *             VirtualUnlock   (KERNEL32.@)
1069  * Unlocks a range of pages in the virtual address space
1070  *
1071  * NOTE
1072  *      Always returns TRUE
1073  *
1074  * RETURNS
1075  *      TRUE: Success
1076  *      FALSE: Failure
1077  */
1078 BOOL WINAPI VirtualUnlock(
1079               LPVOID addr, /* [in] Address of first byte of range */
1080               DWORD size   /* [in] Number of bytes in range */
1081 ) {
1082     return TRUE;
1083 }
1084
1085
1086 /***********************************************************************
1087  *             VirtualProtect   (KERNEL32.@)
1088  * Changes the access protection on a region of committed pages
1089  *
1090  * RETURNS
1091  *      TRUE: Success
1092  *      FALSE: Failure
1093  */
1094 BOOL WINAPI VirtualProtect(
1095               LPVOID addr,     /* [in] Address of region of committed pages */
1096               DWORD size,      /* [in] Size of region */
1097               DWORD new_prot,  /* [in] Desired access protection */
1098               LPDWORD old_prot /* [out] Address of variable to get old protection */
1099 ) {
1100     FILE_VIEW *view;
1101     char *base;
1102     UINT i;
1103     BYTE vprot, *p;
1104     DWORD prot;
1105
1106     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1107
1108     /* Fix the parameters */
1109
1110     size = ROUND_SIZE( addr, size );
1111     base = ROUND_ADDR( addr, page_mask );
1112
1113     if (!(view = VIRTUAL_FindView( base )) ||
1114         (base + size > (char *)view->base + view->size))
1115     {
1116         SetLastError( ERROR_INVALID_PARAMETER );
1117         return FALSE;
1118     }
1119
1120     /* Make sure all the pages are committed */
1121
1122     p = view->prot + ((base - (char *)view->base) >> page_shift);
1123     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1124     for (i = size >> page_shift; i; i--, p++)
1125     {
1126         if (!(*p & VPROT_COMMITTED))
1127         {
1128             SetLastError( ERROR_INVALID_PARAMETER );
1129             return FALSE;
1130         }
1131     }
1132
1133     if (old_prot) *old_prot = prot;
1134     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1135     return VIRTUAL_SetProt( view, base, size, vprot );
1136 }
1137
1138
1139 /***********************************************************************
1140  *             VirtualProtectEx   (KERNEL32.@)
1141  * Changes the access protection on a region of committed pages in the
1142  * virtual address space of a specified process
1143  *
1144  * RETURNS
1145  *      TRUE: Success
1146  *      FALSE: Failure
1147  */
1148 BOOL WINAPI VirtualProtectEx(
1149               HANDLE handle, /* [in]  Handle of process */
1150               LPVOID addr,     /* [in]  Address of region of committed pages */
1151               DWORD size,      /* [in]  Size of region */
1152               DWORD new_prot,  /* [in]  Desired access protection */
1153               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1154 {
1155     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1156         return VirtualProtect( addr, size, new_prot, old_prot );
1157     ERR("Unsupported on other process\n");
1158     return FALSE;
1159 }
1160
1161
1162 /***********************************************************************
1163  *             VirtualQuery   (KERNEL32.@)
1164  * Provides info about a range of pages in virtual address space
1165  *
1166  * RETURNS
1167  *      Number of bytes returned in information buffer
1168  *      or 0 if addr is >= 0xc0000000 (kernel space).
1169  */
1170 DWORD WINAPI VirtualQuery(
1171              LPCVOID addr,                    /* [in]  Address of region */
1172              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1173              DWORD len                        /* [in]  Size of buffer */
1174 ) {
1175     FILE_VIEW *view;
1176     char *base, *alloc_base = 0;
1177     UINT size = 0;
1178
1179     if (addr >= (void*)0xc0000000) return 0;
1180
1181     base = ROUND_ADDR( addr, page_mask );
1182
1183     /* Find the view containing the address */
1184
1185     EnterCriticalSection(&csVirtual);
1186     view = VIRTUAL_FirstView;
1187     for (;;)
1188     {
1189         if (!view)
1190         {
1191             size = (char *)0xffff0000 - alloc_base;
1192             break;
1193         }
1194         if ((char *)view->base > base)
1195         {
1196             size = (char *)view->base - alloc_base;
1197             view = NULL;
1198             break;
1199         }
1200         if ((char *)view->base + view->size > base)
1201         {
1202             alloc_base = view->base;
1203             size = view->size;
1204             break;
1205         }
1206         alloc_base = (char *)view->base + view->size;
1207         view = view->next;
1208     }
1209     LeaveCriticalSection(&csVirtual);
1210
1211     /* Fill the info structure */
1212
1213     if (!view)
1214     {
1215         info->State             = MEM_FREE;
1216         info->Protect           = 0;
1217         info->AllocationProtect = 0;
1218         info->Type              = 0;
1219     }
1220     else
1221     {
1222         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1223         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1224         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1225             if (view->prot[size >> page_shift] != vprot) break;
1226         info->AllocationProtect = view->protect;
1227         info->Type              = MEM_PRIVATE;  /* FIXME */
1228     }
1229
1230     info->BaseAddress    = (LPVOID)base;
1231     info->AllocationBase = (LPVOID)alloc_base;
1232     info->RegionSize     = size - (base - alloc_base);
1233     return sizeof(*info);
1234 }
1235
1236
1237 /***********************************************************************
1238  *             VirtualQueryEx   (KERNEL32.@)
1239  * Provides info about a range of pages in virtual address space of a
1240  * specified process
1241  *
1242  * RETURNS
1243  *      Number of bytes returned in information buffer
1244  */
1245 DWORD WINAPI VirtualQueryEx(
1246              HANDLE handle,                 /* [in] Handle of process */
1247              LPCVOID addr,                    /* [in] Address of region */
1248              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1249              DWORD len                        /* [in] Size of buffer */ )
1250 {
1251     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1252         return VirtualQuery( addr, info, len );
1253     ERR("Unsupported on other process\n");
1254     return 0;
1255 }
1256
1257
1258 /***********************************************************************
1259  *             IsBadReadPtr   (KERNEL32.@)
1260  *
1261  * RETURNS
1262  *      FALSE: Process has read access to entire block
1263  *      TRUE: Otherwise
1264  */
1265 BOOL WINAPI IsBadReadPtr(
1266               LPCVOID ptr, /* [in] Address of memory block */
1267               UINT size )  /* [in] Size of block */
1268 {
1269     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1270     __TRY
1271     {
1272         volatile const char *p = ptr;
1273         char dummy;
1274         UINT count = size;
1275
1276         while (count > page_size)
1277         {
1278             dummy = *p;
1279             p += page_size;
1280             count -= page_size;
1281         }
1282         dummy = p[0];
1283         dummy = p[count - 1];
1284     }
1285     __EXCEPT(page_fault) { return TRUE; }
1286     __ENDTRY
1287     return FALSE;
1288 }
1289
1290
1291 /***********************************************************************
1292  *             IsBadWritePtr   (KERNEL32.@)
1293  *
1294  * RETURNS
1295  *      FALSE: Process has write access to entire block
1296  *      TRUE: Otherwise
1297  */
1298 BOOL WINAPI IsBadWritePtr(
1299               LPVOID ptr, /* [in] Address of memory block */
1300               UINT size ) /* [in] Size of block in bytes */
1301 {
1302     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1303     __TRY
1304     {
1305         volatile char *p = ptr;
1306         UINT count = size;
1307
1308         while (count > page_size)
1309         {
1310             *p |= 0;
1311             p += page_size;
1312             count -= page_size;
1313         }
1314         p[0] |= 0;
1315         p[count - 1] |= 0;
1316     }
1317     __EXCEPT(page_fault) { return TRUE; }
1318     __ENDTRY
1319     return FALSE;
1320 }
1321
1322
1323 /***********************************************************************
1324  *             IsBadHugeReadPtr   (KERNEL32.@)
1325  * RETURNS
1326  *      FALSE: Process has read access to entire block
1327  *      TRUE: Otherwise
1328  */
1329 BOOL WINAPI IsBadHugeReadPtr(
1330               LPCVOID ptr, /* [in] Address of memory block */
1331               UINT size  /* [in] Size of block */
1332 ) {
1333     return IsBadReadPtr( ptr, size );
1334 }
1335
1336
1337 /***********************************************************************
1338  *             IsBadHugeWritePtr   (KERNEL32.@)
1339  * RETURNS
1340  *      FALSE: Process has write access to entire block
1341  *      TRUE: Otherwise
1342  */
1343 BOOL WINAPI IsBadHugeWritePtr(
1344               LPVOID ptr, /* [in] Address of memory block */
1345               UINT size /* [in] Size of block */
1346 ) {
1347     return IsBadWritePtr( ptr, size );
1348 }
1349
1350
1351 /***********************************************************************
1352  *             IsBadCodePtr   (KERNEL32.@)
1353  *
1354  * RETURNS
1355  *      FALSE: Process has read access to specified memory
1356  *      TRUE: Otherwise
1357  */
1358 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1359 {
1360     return IsBadReadPtr( ptr, 1 );
1361 }
1362
1363
1364 /***********************************************************************
1365  *             IsBadStringPtrA   (KERNEL32.@)
1366  *
1367  * RETURNS
1368  *      FALSE: Read access to all bytes in string
1369  *      TRUE: Else
1370  */
1371 BOOL WINAPI IsBadStringPtrA(
1372               LPCSTR str, /* [in] Address of string */
1373               UINT max )  /* [in] Maximum size of string */
1374 {
1375     __TRY
1376     {
1377         volatile const char *p = str;
1378         while (p != str + max) if (!*p++) break;
1379     }
1380     __EXCEPT(page_fault) { return TRUE; }
1381     __ENDTRY
1382     return FALSE;
1383 }
1384
1385
1386 /***********************************************************************
1387  *             IsBadStringPtrW   (KERNEL32.@)
1388  * See IsBadStringPtrA
1389  */
1390 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1391 {
1392     __TRY
1393     {
1394         volatile const WCHAR *p = str;
1395         while (p != str + max) if (!*p++) break;
1396     }
1397     __EXCEPT(page_fault) { return TRUE; }
1398     __ENDTRY
1399     return FALSE;
1400 }
1401
1402
1403 /***********************************************************************
1404  *             CreateFileMappingA   (KERNEL32.@)
1405  * Creates a named or unnamed file-mapping object for the specified file
1406  *
1407  * RETURNS
1408  *      Handle: Success
1409  *      0: Mapping object does not exist
1410  *      NULL: Failure
1411  */
1412 HANDLE WINAPI CreateFileMappingA(
1413                 HANDLE hFile,   /* [in] Handle of file to map */
1414                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1415                 DWORD protect,   /* [in] Protection for mapping object */
1416                 DWORD size_high, /* [in] High-order 32 bits of object size */
1417                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1418                 LPCSTR name      /* [in] Name of file-mapping object */ )
1419 {
1420     WCHAR buffer[MAX_PATH];
1421
1422     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1423
1424     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1425     {
1426         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1427         return 0;
1428     }
1429     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1430 }
1431
1432
1433 /***********************************************************************
1434  *             CreateFileMappingW   (KERNEL32.@)
1435  * See CreateFileMappingA
1436  */
1437 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1438                                   DWORD protect, DWORD size_high,
1439                                   DWORD size_low, LPCWSTR name )
1440 {
1441     HANDLE ret;
1442     BYTE vprot;
1443     DWORD len = name ? strlenW(name) : 0;
1444
1445     /* Check parameters */
1446
1447     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1448           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1449
1450     if (len > MAX_PATH)
1451     {
1452         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1453         return 0;
1454     }
1455
1456     vprot = VIRTUAL_GetProt( protect );
1457     if (protect & SEC_RESERVE)
1458     {
1459         if (hFile != INVALID_HANDLE_VALUE)
1460         {
1461             SetLastError( ERROR_INVALID_PARAMETER );
1462             return 0;
1463         }
1464     }
1465     else vprot |= VPROT_COMMITTED;
1466     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1467     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1468
1469     /* Create the server object */
1470
1471     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1472     SERVER_START_REQ( create_mapping )
1473     {
1474         req->file_handle = hFile;
1475         req->size_high   = size_high;
1476         req->size_low    = size_low;
1477         req->protect     = vprot;
1478         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1479         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1480         SetLastError(0);
1481         wine_server_call_err( req );
1482         ret = reply->handle;
1483     }
1484     SERVER_END_REQ;
1485     return ret;
1486 }
1487
1488
1489 /***********************************************************************
1490  *             OpenFileMappingA   (KERNEL32.@)
1491  * Opens a named file-mapping object.
1492  *
1493  * RETURNS
1494  *      Handle: Success
1495  *      NULL: Failure
1496  */
1497 HANDLE WINAPI OpenFileMappingA(
1498                 DWORD access,   /* [in] Access mode */
1499                 BOOL inherit, /* [in] Inherit flag */
1500                 LPCSTR name )   /* [in] Name of file-mapping object */
1501 {
1502     WCHAR buffer[MAX_PATH];
1503
1504     if (!name) return OpenFileMappingW( access, inherit, NULL );
1505
1506     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1507     {
1508         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1509         return 0;
1510     }
1511     return OpenFileMappingW( access, inherit, buffer );
1512 }
1513
1514
1515 /***********************************************************************
1516  *             OpenFileMappingW   (KERNEL32.@)
1517  * See OpenFileMappingA
1518  */
1519 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1520 {
1521     HANDLE ret;
1522     DWORD len = name ? strlenW(name) : 0;
1523     if (len >= MAX_PATH)
1524     {
1525         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1526         return 0;
1527     }
1528     SERVER_START_REQ( open_mapping )
1529     {
1530         req->access  = access;
1531         req->inherit = inherit;
1532         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1533         wine_server_call_err( req );
1534         ret = reply->handle;
1535     }
1536     SERVER_END_REQ;
1537     return ret;
1538 }
1539
1540
1541 /***********************************************************************
1542  *             MapViewOfFile   (KERNEL32.@)
1543  * Maps a view of a file into the address space
1544  *
1545  * RETURNS
1546  *      Starting address of mapped view
1547  *      NULL: Failure
1548  */
1549 LPVOID WINAPI MapViewOfFile(
1550               HANDLE mapping,  /* [in] File-mapping object to map */
1551               DWORD access,      /* [in] Access mode */
1552               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1553               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1554               DWORD count        /* [in] Number of bytes to map */
1555 ) {
1556     return MapViewOfFileEx( mapping, access, offset_high,
1557                             offset_low, count, NULL );
1558 }
1559
1560
1561 /***********************************************************************
1562  *             MapViewOfFileEx   (KERNEL32.@)
1563  * Maps a view of a file into the address space
1564  *
1565  * RETURNS
1566  *      Starting address of mapped view
1567  *      NULL: Failure
1568  */
1569 LPVOID WINAPI MapViewOfFileEx(
1570               HANDLE handle,   /* [in] File-mapping object to map */
1571               DWORD access,      /* [in] Access mode */
1572               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1573               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1574               DWORD count,       /* [in] Number of bytes to map */
1575               LPVOID addr        /* [in] Suggested starting address for mapped view */
1576 ) {
1577     FILE_VIEW *view;
1578     UINT size = 0;
1579     int flags = MAP_PRIVATE;
1580     int unix_handle = -1;
1581     int prot, res;
1582     void *base, *ptr = (void *)-1, *ret;
1583     DWORD size_low, size_high, header_size, shared_size;
1584     HANDLE shared_file;
1585     BOOL removable;
1586
1587     /* Check parameters */
1588
1589     if ((offset_low & granularity_mask) ||
1590         (addr && ((UINT_PTR)addr & granularity_mask)))
1591     {
1592         SetLastError( ERROR_INVALID_PARAMETER );
1593         return NULL;
1594     }
1595
1596     SERVER_START_REQ( get_mapping_info )
1597     {
1598         req->handle = handle;
1599         res = wine_server_call_err( req );
1600         prot        = reply->protect;
1601         base        = reply->base;
1602         size_low    = reply->size_low;
1603         size_high   = reply->size_high;
1604         header_size = reply->header_size;
1605         shared_file = reply->shared_file;
1606         shared_size = reply->shared_size;
1607         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1608                        reply->drive_type == DRIVE_CDROM);
1609     }
1610     SERVER_END_REQ;
1611     if (res) goto error;
1612
1613     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1614
1615     if (prot & VPROT_IMAGE)
1616         return map_image( handle, unix_handle, base, size_low, header_size,
1617                           shared_file, shared_size, removable );
1618
1619
1620     if (size_high)
1621         ERR("Sizes larger than 4Gb not supported\n");
1622
1623     if ((offset_low >= size_low) ||
1624         (count > size_low - offset_low))
1625     {
1626         SetLastError( ERROR_INVALID_PARAMETER );
1627         goto error;
1628     }
1629     if (count) size = ROUND_SIZE( offset_low, count );
1630     else size = size_low - offset_low;
1631
1632     switch(access)
1633     {
1634     case FILE_MAP_ALL_ACCESS:
1635     case FILE_MAP_WRITE:
1636     case FILE_MAP_WRITE | FILE_MAP_READ:
1637         if (!(prot & VPROT_WRITE))
1638         {
1639             SetLastError( ERROR_INVALID_PARAMETER );
1640             goto error;
1641         }
1642         flags = MAP_SHARED;
1643         /* fall through */
1644     case FILE_MAP_READ:
1645     case FILE_MAP_COPY:
1646     case FILE_MAP_COPY | FILE_MAP_READ:
1647         if (prot & VPROT_READ) break;
1648         /* fall through */
1649     default:
1650         SetLastError( ERROR_INVALID_PARAMETER );
1651         goto error;
1652     }
1653
1654     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1655      * which has a view of this mapping commits some pages, they will
1656      * appear commited in all other processes, which have the same
1657      * view created. Since we don`t support this yet, we create the
1658      * whole mapping commited.
1659      */
1660     prot |= VPROT_COMMITTED;
1661
1662     /* Reserve a properly aligned area */
1663
1664     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1665
1666     /* Map the file */
1667
1668     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1669
1670     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1671                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1672     if (ret != ptr)
1673     {
1674         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1675         goto error;
1676     }
1677     if (removable) handle = 0;  /* don't keep handle open on removable media */
1678
1679     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1680     {
1681         SetLastError( ERROR_OUTOFMEMORY );
1682         goto error;
1683     }
1684     if (unix_handle != -1) close( unix_handle );
1685     return ptr;
1686
1687 error:
1688     if (unix_handle != -1) close( unix_handle );
1689     if (ptr != (void *)-1) munmap( ptr, size );
1690     return NULL;
1691 }
1692
1693
1694 /***********************************************************************
1695  *             FlushViewOfFile   (KERNEL32.@)
1696  * Writes to the disk a byte range within a mapped view of a file
1697  *
1698  * RETURNS
1699  *      TRUE: Success
1700  *      FALSE: Failure
1701  */
1702 BOOL WINAPI FlushViewOfFile(
1703               LPCVOID base, /* [in] Start address of byte range to flush */
1704               DWORD cbFlush /* [in] Number of bytes in range */
1705 ) {
1706     FILE_VIEW *view;
1707     void *addr = ROUND_ADDR( base, page_mask );
1708
1709     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1710                      base, cbFlush );
1711
1712     if (!(view = VIRTUAL_FindView( addr )))
1713     {
1714         SetLastError( ERROR_INVALID_PARAMETER );
1715         return FALSE;
1716     }
1717     if (!cbFlush) cbFlush = view->size;
1718     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1719     SetLastError( ERROR_INVALID_PARAMETER );
1720     return FALSE;
1721 }
1722
1723
1724 /***********************************************************************
1725  *             UnmapViewOfFile   (KERNEL32.@)
1726  * Unmaps a mapped view of a file.
1727  *
1728  * NOTES
1729  *      Should addr be an LPCVOID?
1730  *
1731  * RETURNS
1732  *      TRUE: Success
1733  *      FALSE: Failure
1734  */
1735 BOOL WINAPI UnmapViewOfFile(
1736               LPVOID addr /* [in] Address where mapped view begins */
1737 ) {
1738     FILE_VIEW *view;
1739     void *base = ROUND_ADDR( addr, page_mask );
1740     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1741     {
1742         SetLastError( ERROR_INVALID_PARAMETER );
1743         return FALSE;
1744     }
1745     VIRTUAL_DeleteView( view );
1746     return TRUE;
1747 }