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     int i, pos;
 506     DWORD err = GetLastError();
 507     FILE_VIEW *view;
 508     char *ptr;
 509     int shared_fd = -1;
 510
 511     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 512
 513     /* zero-map the whole range */
 514
 515     if ((ptr = wine_anon_mmap( base, total_size,
 516                              PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 517     {
 518         ptr = wine_anon_mmap( NULL, total_size,
 519                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 520         if (ptr == (char *)-1)
 521         {
 522             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 523             goto error;
 524         }
 525     }
 526     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 527
 528     /* map the header */
 529
 530     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 531                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 532     dos = (IMAGE_DOS_HEADER *)ptr;
 533     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 534     if ((char *)(nt + 1) > ptr + header_size) goto error;
 535
 536     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 537     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 538
 539     /* check the architecture */
 540
 541     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 542     {
 543         MESSAGE("Trying to load PE image for unsupported architecture (");
 544         switch (nt->FileHeader.Machine)
 545         {
 546         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 547         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 548         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 549         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 550         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 551         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 552         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 553         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 554         }
 555         MESSAGE(")\n");
 556         goto error;
 557     }
 558
 559     /* retrieve the shared sections file */
 560
 561     if (shared_size)
 562     {
 563         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 564         CloseHandle( shared_file );  /* we no longer need it */
 565         shared_file = 0;
 566     }
 567
 568     /* map all the sections */
 569
 570     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 571     {
 572         DWORD size;
 573
 574         /* a few sanity checks */
 575         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 576         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 577         {
 578             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 579                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 580             goto error;
 581         }
 582
 583         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 584             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 585         {
 586             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 587             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 588                           sec->Name, ptr + sec->VirtualAddress,
 589                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 590                           size, sec->Characteristics );
 591             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 592                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 593                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 594             {
 595                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 596                 goto error;
 597             }
 598             pos += size;
 599             continue;
 600         }
 601
 602         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 603         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 604
 605         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 606                         sec->Name, ptr + sec->VirtualAddress,
 607                         sec->PointerToRawData, sec->SizeOfRawData,
 608                         sec->Characteristics );
 609
 610         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 611          *       fall back to read(), so we don't need to check anything here.
 612          */
 613         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 614                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 615                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 616         {
 617             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 618             goto error;
 619         }
 620
 621         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 622         {
 623             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 624             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 625             TRACE_(module)("clearing %p - %p\n",
 626                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 627                            ptr + sec->VirtualAddress + end );
 628             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 629                     end - sec->SizeOfRawData );
 630         }
 631     }
 632
 633     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 634     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
 635                                      VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
 636                                      hmapping )))
 637     {
 638         SetLastError( ERROR_OUTOFMEMORY );
 639         goto error;
 640     }
 641
 642     SetLastError( err );  /* restore last error */
 643     close( fd );
 644     if (shared_fd != -1) close( shared_fd );
 645     return ptr;
 646
 647  error:
 648     if (ptr != (char *)-1) munmap( ptr, total_size );
 649     close( fd );
 650     if (shared_fd != -1) close( shared_fd );
 651     if (shared_file) CloseHandle( shared_file );
 652     return NULL;
 653 }
 654
 655
 656 /***********************************************************************
 657  *           VIRTUAL_Init
 658  */
 659 #ifndef page_mask
 660 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 661 {
 662     page_size = getpagesize();
 663     page_mask = page_size - 1;
 664     /* Make sure we have a power of 2 */
 665     assert( !(page_size & page_mask) );
 666     page_shift = 0;
 667     while ((1 << page_shift) != page_size) page_shift++;
 668 }
 669 #endif  /* page_mask */
 670
 671
 672 /***********************************************************************
 673  *           VIRTUAL_SetFaultHandler
 674  */
 675 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 676 {
 677     FILE_VIEW *view;
 678
 679     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 680     view->handlerProc = proc;
 681     view->handlerArg  = arg;
 682     return TRUE;
 683 }
 684
 685 /***********************************************************************
 686  *           VIRTUAL_HandleFault
 687  */
 688 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 689 {
 690     FILE_VIEW *view = VIRTUAL_FindView( addr );
 691     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 692
 693     if (view)
 694     {
 695         if (view->handlerProc)
 696         {
 697             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 698         }
 699         else
 700         {
 701             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 702             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 703             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 704             if (vprot & VPROT_GUARD)
 705             {
 706                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 707                 ret = STATUS_GUARD_PAGE_VIOLATION;
 708             }
 709             /* is it inside the stack guard pages? */
 710             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 711                 ret = STATUS_STACK_OVERFLOW;
 712         }
 713     }
 714     return ret;
 715 }
 716
 717
 718
 719 /***********************************************************************
 720  *           unaligned_mmap
 721  *
 722  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 723  * long as the offset is aligned to the filesystem block size. This is
 724  * a big performance gain so we want to take advantage of it.
 725  *
 726  * However, when we use 64-bit file support this doesn't work because
 727  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 728  * in that it rounds unaligned offsets down to a page boundary. For
 729  * these reasons we do a direct system call here.
 730  */
 731 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 732                              unsigned int flags, int fd, unsigned int offset_low,
 733                              unsigned int offset_high )
 734 {
 735 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 736     if (!offset_high && (offset_low & page_mask))
 737     {
 738         int ret;
 739         __asm__ __volatile__("push %%ebx\n\t"
 740                              "movl %2,%%ebx\n\t"
 741                              "int $0x80\n\t"
 742                              "popl %%ebx"
 743                              : "=a" (ret)
 744                              : "0" (90), /* SYS_mmap */
 745                                "g" (&addr) );
 746         if (ret < 0 && ret > -4096)
 747         {
 748             errno = -ret;
 749             ret = -1;
 750         }
 751         return (void *)ret;
 752     }
 753 #endif
 754     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 755 }
 756
 757
 758 /***********************************************************************
 759  *           VIRTUAL_mmap
 760  *
 761  * Wrapper for mmap() that handles anonymous mappings portably,
 762  * and falls back to read if mmap of a file fails.
 763  */
 764 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 765                             DWORD offset_low, DWORD offset_high,
 766                             int prot, int flags, BOOL *removable )
 767 {
 768     int pos;
 769     LPVOID ret;
 770     off_t offset;
 771     BOOL is_shared_write = FALSE;
 772
 773     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 774
 775     if (prot & PROT_WRITE)
 776     {
 777 #ifdef MAP_SHARED
 778         if (flags & MAP_SHARED) is_shared_write = TRUE;
 779 #endif
 780 #ifdef MAP_PRIVATE
 781         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 782 #endif
 783     }
 784
 785     if (removable && *removable)
 786     {
 787         /* if on removable media, try using read instead of mmap */
 788         if (!is_shared_write) goto fake_mmap;
 789         *removable = FALSE;
 790     }
 791
 792     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 793                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 794
 795     /* mmap() failed; if this is because the file offset is not    */
 796     /* page-aligned (EINVAL), or because the underlying filesystem */
 797     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 798
 799     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 800     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 801
 802  fake_mmap:
 803     /* Reserve the memory with an anonymous mmap */
 804     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 805     if (ret == (LPVOID)-1) return ret;
 806     /* Now read in the file */
 807     offset = ((off_t)offset_high << 32) | offset_low;
 808     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 809     {
 810         munmap( ret, size );
 811         return (LPVOID)-1;
 812     }
 813     read( fd, ret, size );
 814     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 815     mprotect( ret, size, prot );  /* Set the right protection */
 816     return ret;
 817 }
 818
 819
 820 /***********************************************************************
 821  *             VirtualAlloc   (KERNEL32.@)
 822  * Reserves or commits a region of pages in virtual address space
 823  *
 824  * RETURNS
 825  *      Base address of allocated region of pages
 826  *      NULL: Failure
 827  */
 828 LPVOID WINAPI VirtualAlloc(
 829               LPVOID addr,  /* [in] Address of region to reserve or commit */
 830               DWORD size,   /* [in] Size of region */
 831               DWORD type,   /* [in] Type of allocation */
 832               DWORD protect)/* [in] Type of access protection */
 833 {
 834     FILE_VIEW *view;
 835     char *ptr, *base;
 836     BYTE vprot;
 837
 838     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 839
 840     /* Round parameters to a page boundary */
 841
 842     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 843     {
 844         SetLastError( ERROR_OUTOFMEMORY );
 845         return NULL;
 846     }
 847     if (addr)
 848     {
 849         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 850             base = ROUND_ADDR( addr, granularity_mask );
 851         else
 852             base = ROUND_ADDR( addr, page_mask );
 853         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
 854         if ((base <= (char *)granularity_mask) || (base + size < base))
 855         {
 856             /* disallow low 64k and wrap-around */
 857             SetLastError( ERROR_INVALID_PARAMETER );
 858             return NULL;
 859         }
 860     }
 861     else
 862     {
 863         base = 0;
 864         size = (size + page_mask) & ~page_mask;
 865     }
 866
 867     if (type & MEM_TOP_DOWN) {
 868         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
 869          *        Is there _ANY_ way to do it with UNIX mmap()?
 870          */
 871         WARN("MEM_TOP_DOWN ignored\n");
 872         type &= ~MEM_TOP_DOWN;
 873     }
 874     /* Compute the alloc type flags */
 875
 876     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
 877         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
 878     {
 879         ERR("called with wrong alloc type flags (%08lx) !\n", type);
 880         SetLastError( ERROR_INVALID_PARAMETER );
 881         return NULL;
 882     }
 883     if (type & (MEM_COMMIT | MEM_SYSTEM))
 884         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 885     else vprot = 0;
 886
 887     /* Reserve the memory */
 888
 889     if ((type & MEM_RESERVE) || !base)
 890     {
 891         if (type & MEM_SYSTEM)
 892         {
 893             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
 894             {
 895                 SetLastError( ERROR_OUTOFMEMORY );
 896                 return NULL;
 897             }
 898             return (LPVOID)base;
 899         }
 900         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
 901         if (ptr == (void *)-1) return NULL;
 902
 903         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
 904         {
 905             munmap( ptr, size );
 906             SetLastError( ERROR_OUTOFMEMORY );
 907             return NULL;
 908         }
 909         return ptr;
 910     }
 911
 912     /* Commit the pages */
 913
 914     if (!(view = VIRTUAL_FindView( base )) ||
 915         (base + size > (char *)view->base + view->size))
 916     {
 917         SetLastError( ERROR_INVALID_ADDRESS );
 918         return NULL;
 919     }
 920
 921     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 922     return (LPVOID)base;
 923 }
 924
 925
 926 /***********************************************************************
 927  *             VirtualAllocEx   (KERNEL32.@)
 928  *
 929  * Seems to be just as VirtualAlloc, but with process handle.
 930  */
 931 LPVOID WINAPI VirtualAllocEx(
 932               HANDLE hProcess, /* [in] Handle of process to do mem operation */
 933               LPVOID addr,  /* [in] Address of region to reserve or commit */
 934               DWORD size,   /* [in] Size of region */
 935               DWORD type,   /* [in] Type of allocation */
 936               DWORD protect /* [in] Type of access protection */
 937 ) {
 938     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
 939         return VirtualAlloc( addr, size, type, protect );
 940     ERR("Unsupported on other process\n");
 941     return NULL;
 942 }
 943
 944
 945 /***********************************************************************
 946  *             VirtualFree   (KERNEL32.@)
 947  * Release or decommits a region of pages in virtual address space.
 948  *
 949  * RETURNS
 950  *      TRUE: Success
 951  *      FALSE: Failure
 952  */
 953 BOOL WINAPI VirtualFree(
 954               LPVOID addr, /* [in] Address of region of committed pages */
 955               DWORD size,  /* [in] Size of region */
 956               DWORD type   /* [in] Type of operation */
 957 ) {
 958     FILE_VIEW *view;
 959     char *base;
 960
 961     TRACE("%p %08lx %lx\n", addr, size, type );
 962
 963     /* Fix the parameters */
 964
 965     size = ROUND_SIZE( addr, size );
 966     base = ROUND_ADDR( addr, page_mask );
 967
 968     if (!(view = VIRTUAL_FindView( base )) ||
 969         (base + size > (char *)view->base + view->size) ||
 970         !(view->flags & VFLAG_VALLOC))
 971     {
 972         SetLastError( ERROR_INVALID_PARAMETER );
 973         return FALSE;
 974     }
 975
 976     /* Check the type */
 977
 978     if (type & MEM_SYSTEM)
 979     {
 980         view->flags |= VFLAG_SYSTEM;
 981         type &= ~MEM_SYSTEM;
 982     }
 983
 984     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 985     {
 986         ERR("called with wrong free type flags (%08lx) !\n", type);
 987         SetLastError( ERROR_INVALID_PARAMETER );
 988         return FALSE;
 989     }
 990
 991     /* Free the pages */
 992
 993     if (type == MEM_RELEASE)
 994     {
 995         if (size || (base != view->base))
 996         {
 997             SetLastError( ERROR_INVALID_PARAMETER );
 998             return FALSE;
 999         }
1000         VIRTUAL_DeleteView( view );
1001         return TRUE;
1002     }
1003
1004     /* Decommit the pages by remapping zero-pages instead */
1005
1006     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1007         ERR( "Could not remap pages, expect trouble\n" );
1008     return VIRTUAL_SetProt( view, base, size, 0 );
1009 }
1010
1011
1012 /***********************************************************************
1013  *             VirtualLock   (KERNEL32.@)
1014  * Locks the specified region of virtual address space
1015  *
1016  * NOTE
1017  *      Always returns TRUE
1018  *
1019  * RETURNS
1020  *      TRUE: Success
1021  *      FALSE: Failure
1022  */
1023 BOOL WINAPI VirtualLock(
1024               LPVOID addr, /* [in] Address of first byte of range to lock */
1025               DWORD size   /* [in] Number of bytes in range to lock */
1026 ) {
1027     return TRUE;
1028 }
1029
1030
1031 /***********************************************************************
1032  *             VirtualUnlock   (KERNEL32.@)
1033  * Unlocks a range of pages in the virtual address space
1034  *
1035  * NOTE
1036  *      Always returns TRUE
1037  *
1038  * RETURNS
1039  *      TRUE: Success
1040  *      FALSE: Failure
1041  */
1042 BOOL WINAPI VirtualUnlock(
1043               LPVOID addr, /* [in] Address of first byte of range */
1044               DWORD size   /* [in] Number of bytes in range */
1045 ) {
1046     return TRUE;
1047 }
1048
1049
1050 /***********************************************************************
1051  *             VirtualProtect   (KERNEL32.@)
1052  * Changes the access protection on a region of committed pages
1053  *
1054  * RETURNS
1055  *      TRUE: Success
1056  *      FALSE: Failure
1057  */
1058 BOOL WINAPI VirtualProtect(
1059               LPVOID addr,     /* [in] Address of region of committed pages */
1060               DWORD size,      /* [in] Size of region */
1061               DWORD new_prot,  /* [in] Desired access protection */
1062               LPDWORD old_prot /* [out] Address of variable to get old protection */
1063 ) {
1064     FILE_VIEW *view;
1065     char *base;
1066     UINT i;
1067     BYTE vprot, *p;
1068     DWORD prot;
1069
1070     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1071
1072     /* Fix the parameters */
1073
1074     size = ROUND_SIZE( addr, size );
1075     base = ROUND_ADDR( addr, page_mask );
1076
1077     if (!(view = VIRTUAL_FindView( base )) ||
1078         (base + size > (char *)view->base + view->size))
1079     {
1080         SetLastError( ERROR_INVALID_PARAMETER );
1081         return FALSE;
1082     }
1083
1084     /* Make sure all the pages are committed */
1085
1086     p = view->prot + ((base - (char *)view->base) >> page_shift);
1087     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1088     for (i = size >> page_shift; i; i--, p++)
1089     {
1090         if (!(*p & VPROT_COMMITTED))
1091         {
1092             SetLastError( ERROR_INVALID_PARAMETER );
1093             return FALSE;
1094         }
1095     }
1096
1097     if (old_prot) *old_prot = prot;
1098     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1099     return VIRTUAL_SetProt( view, base, size, vprot );
1100 }
1101
1102
1103 /***********************************************************************
1104  *             VirtualProtectEx   (KERNEL32.@)
1105  * Changes the access protection on a region of committed pages in the
1106  * virtual address space of a specified process
1107  *
1108  * RETURNS
1109  *      TRUE: Success
1110  *      FALSE: Failure
1111  */
1112 BOOL WINAPI VirtualProtectEx(
1113               HANDLE handle, /* [in]  Handle of process */
1114               LPVOID addr,     /* [in]  Address of region of committed pages */
1115               DWORD size,      /* [in]  Size of region */
1116               DWORD new_prot,  /* [in]  Desired access protection */
1117               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1118 {
1119     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1120         return VirtualProtect( addr, size, new_prot, old_prot );
1121     ERR("Unsupported on other process\n");
1122     return FALSE;
1123 }
1124
1125
1126 /***********************************************************************
1127  *             VirtualQuery   (KERNEL32.@)
1128  * Provides info about a range of pages in virtual address space
1129  *
1130  * RETURNS
1131  *      Number of bytes returned in information buffer
1132  *      or 0 if addr is >= 0xc0000000 (kernel space).
1133  */
1134 DWORD WINAPI VirtualQuery(
1135              LPCVOID addr,                    /* [in]  Address of region */
1136              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1137              DWORD len                        /* [in]  Size of buffer */
1138 ) {
1139     FILE_VIEW *view;
1140     char *base, *alloc_base = 0;
1141     UINT size = 0;
1142
1143     if (addr >= (void*)0xc0000000) return 0;
1144
1145     base = ROUND_ADDR( addr, page_mask );
1146
1147     /* Find the view containing the address */
1148
1149     EnterCriticalSection(&csVirtual);
1150     view = VIRTUAL_FirstView;
1151     for (;;)
1152     {
1153         if (!view)
1154         {
1155             size = (char *)0xffff0000 - alloc_base;
1156             break;
1157         }
1158         if ((char *)view->base > base)
1159         {
1160             size = (char *)view->base - alloc_base;
1161             view = NULL;
1162             break;
1163         }
1164         if ((char *)view->base + view->size > base)
1165         {
1166             alloc_base = view->base;
1167             size = view->size;
1168             break;
1169         }
1170         alloc_base = (char *)view->base + view->size;
1171         view = view->next;
1172     }
1173     LeaveCriticalSection(&csVirtual);
1174
1175     /* Fill the info structure */
1176
1177     if (!view)
1178     {
1179         info->State             = MEM_FREE;
1180         info->Protect           = 0;
1181         info->AllocationProtect = 0;
1182         info->Type              = 0;
1183     }
1184     else
1185     {
1186         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1187         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1188         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1189             if (view->prot[size >> page_shift] != vprot) break;
1190         info->AllocationProtect = view->protect;
1191         info->Type              = MEM_PRIVATE;  /* FIXME */
1192     }
1193
1194     info->BaseAddress    = (LPVOID)base;
1195     info->AllocationBase = (LPVOID)alloc_base;
1196     info->RegionSize     = size - (base - alloc_base);
1197     return sizeof(*info);
1198 }
1199
1200
1201 /***********************************************************************
1202  *             VirtualQueryEx   (KERNEL32.@)
1203  * Provides info about a range of pages in virtual address space of a
1204  * specified process
1205  *
1206  * RETURNS
1207  *      Number of bytes returned in information buffer
1208  */
1209 DWORD WINAPI VirtualQueryEx(
1210              HANDLE handle,                 /* [in] Handle of process */
1211              LPCVOID addr,                    /* [in] Address of region */
1212              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1213              DWORD len                        /* [in] Size of buffer */ )
1214 {
1215     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1216         return VirtualQuery( addr, info, len );
1217     ERR("Unsupported on other process\n");
1218     return 0;
1219 }
1220
1221
1222 /***********************************************************************
1223  *             IsBadReadPtr   (KERNEL32.@)
1224  *
1225  * RETURNS
1226  *      FALSE: Process has read access to entire block
1227  *      TRUE: Otherwise
1228  */
1229 BOOL WINAPI IsBadReadPtr(
1230               LPCVOID ptr, /* [in] Address of memory block */
1231               UINT size )  /* [in] Size of block */
1232 {
1233     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1234     __TRY
1235     {
1236         volatile const char *p = ptr;
1237         char dummy;
1238         UINT count = size;
1239
1240         while (count > page_size)
1241         {
1242             dummy = *p;
1243             p += page_size;
1244             count -= page_size;
1245         }
1246         dummy = p[0];
1247         dummy = p[count - 1];
1248     }
1249     __EXCEPT(page_fault) { return TRUE; }
1250     __ENDTRY
1251     return FALSE;
1252 }
1253
1254
1255 /***********************************************************************
1256  *             IsBadWritePtr   (KERNEL32.@)
1257  *
1258  * RETURNS
1259  *      FALSE: Process has write access to entire block
1260  *      TRUE: Otherwise
1261  */
1262 BOOL WINAPI IsBadWritePtr(
1263               LPVOID ptr, /* [in] Address of memory block */
1264               UINT size ) /* [in] Size of block in bytes */
1265 {
1266     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1267     __TRY
1268     {
1269         volatile char *p = ptr;
1270         UINT count = size;
1271
1272         while (count > page_size)
1273         {
1274             *p |= 0;
1275             p += page_size;
1276             count -= page_size;
1277         }
1278         p[0] |= 0;
1279         p[count - 1] |= 0;
1280     }
1281     __EXCEPT(page_fault) { return TRUE; }
1282     __ENDTRY
1283     return FALSE;
1284 }
1285
1286
1287 /***********************************************************************
1288  *             IsBadHugeReadPtr   (KERNEL32.@)
1289  * RETURNS
1290  *      FALSE: Process has read access to entire block
1291  *      TRUE: Otherwise
1292  */
1293 BOOL WINAPI IsBadHugeReadPtr(
1294               LPCVOID ptr, /* [in] Address of memory block */
1295               UINT size  /* [in] Size of block */
1296 ) {
1297     return IsBadReadPtr( ptr, size );
1298 }
1299
1300
1301 /***********************************************************************
1302  *             IsBadHugeWritePtr   (KERNEL32.@)
1303  * RETURNS
1304  *      FALSE: Process has write access to entire block
1305  *      TRUE: Otherwise
1306  */
1307 BOOL WINAPI IsBadHugeWritePtr(
1308               LPVOID ptr, /* [in] Address of memory block */
1309               UINT size /* [in] Size of block */
1310 ) {
1311     return IsBadWritePtr( ptr, size );
1312 }
1313
1314
1315 /***********************************************************************
1316  *             IsBadCodePtr   (KERNEL32.@)
1317  *
1318  * RETURNS
1319  *      FALSE: Process has read access to specified memory
1320  *      TRUE: Otherwise
1321  */
1322 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1323 {
1324     return IsBadReadPtr( ptr, 1 );
1325 }
1326
1327
1328 /***********************************************************************
1329  *             IsBadStringPtrA   (KERNEL32.@)
1330  *
1331  * RETURNS
1332  *      FALSE: Read access to all bytes in string
1333  *      TRUE: Else
1334  */
1335 BOOL WINAPI IsBadStringPtrA(
1336               LPCSTR str, /* [in] Address of string */
1337               UINT max )  /* [in] Maximum size of string */
1338 {
1339     __TRY
1340     {
1341         volatile const char *p = str;
1342         while (p != str + max) if (!*p++) break;
1343     }
1344     __EXCEPT(page_fault) { return TRUE; }
1345     __ENDTRY
1346     return FALSE;
1347 }
1348
1349
1350 /***********************************************************************
1351  *             IsBadStringPtrW   (KERNEL32.@)
1352  * See IsBadStringPtrA
1353  */
1354 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1355 {
1356     __TRY
1357     {
1358         volatile const WCHAR *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  *             CreateFileMappingA   (KERNEL32.@)
1369  * Creates a named or unnamed file-mapping object for the specified file
1370  *
1371  * RETURNS
1372  *      Handle: Success
1373  *      0: Mapping object does not exist
1374  *      NULL: Failure
1375  */
1376 HANDLE WINAPI CreateFileMappingA(
1377                 HANDLE hFile,   /* [in] Handle of file to map */
1378                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1379                 DWORD protect,   /* [in] Protection for mapping object */
1380                 DWORD size_high, /* [in] High-order 32 bits of object size */
1381                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1382                 LPCSTR name      /* [in] Name of file-mapping object */ )
1383 {
1384     WCHAR buffer[MAX_PATH];
1385
1386     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1387
1388     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1389     {
1390         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1391         return 0;
1392     }
1393     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1394 }
1395
1396
1397 /***********************************************************************
1398  *             CreateFileMappingW   (KERNEL32.@)
1399  * See CreateFileMappingA
1400  */
1401 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1402                                   DWORD protect, DWORD size_high,
1403                                   DWORD size_low, LPCWSTR name )
1404 {
1405     HANDLE ret;
1406     BYTE vprot;
1407     DWORD len = name ? strlenW(name) : 0;
1408
1409     /* Check parameters */
1410
1411     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1412           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1413
1414     if (len > MAX_PATH)
1415     {
1416         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1417         return 0;
1418     }
1419
1420     vprot = VIRTUAL_GetProt( protect );
1421     if (protect & SEC_RESERVE)
1422     {
1423         if (hFile != INVALID_HANDLE_VALUE)
1424         {
1425             SetLastError( ERROR_INVALID_PARAMETER );
1426             return 0;
1427         }
1428     }
1429     else vprot |= VPROT_COMMITTED;
1430     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1431     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1432
1433     /* Create the server object */
1434
1435     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1436     SERVER_START_REQ( create_mapping )
1437     {
1438         req->file_handle = hFile;
1439         req->size_high   = size_high;
1440         req->size_low    = size_low;
1441         req->protect     = vprot;
1442         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1443         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1444         SetLastError(0);
1445         wine_server_call_err( req );
1446         ret = reply->handle;
1447     }
1448     SERVER_END_REQ;
1449     return ret;
1450 }
1451
1452
1453 /***********************************************************************
1454  *             OpenFileMappingA   (KERNEL32.@)
1455  * Opens a named file-mapping object.
1456  *
1457  * RETURNS
1458  *      Handle: Success
1459  *      NULL: Failure
1460  */
1461 HANDLE WINAPI OpenFileMappingA(
1462                 DWORD access,   /* [in] Access mode */
1463                 BOOL inherit, /* [in] Inherit flag */
1464                 LPCSTR name )   /* [in] Name of file-mapping object */
1465 {
1466     WCHAR buffer[MAX_PATH];
1467
1468     if (!name) return OpenFileMappingW( access, inherit, NULL );
1469
1470     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1471     {
1472         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1473         return 0;
1474     }
1475     return OpenFileMappingW( access, inherit, buffer );
1476 }
1477
1478
1479 /***********************************************************************
1480  *             OpenFileMappingW   (KERNEL32.@)
1481  * See OpenFileMappingA
1482  */
1483 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1484 {
1485     HANDLE ret;
1486     DWORD len = name ? strlenW(name) : 0;
1487     if (len >= MAX_PATH)
1488     {
1489         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1490         return 0;
1491     }
1492     SERVER_START_REQ( open_mapping )
1493     {
1494         req->access  = access;
1495         req->inherit = inherit;
1496         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1497         wine_server_call_err( req );
1498         ret = reply->handle;
1499     }
1500     SERVER_END_REQ;
1501     return ret;
1502 }
1503
1504
1505 /***********************************************************************
1506  *             MapViewOfFile   (KERNEL32.@)
1507  * Maps a view of a file into the address space
1508  *
1509  * RETURNS
1510  *      Starting address of mapped view
1511  *      NULL: Failure
1512  */
1513 LPVOID WINAPI MapViewOfFile(
1514               HANDLE mapping,  /* [in] File-mapping object to map */
1515               DWORD access,      /* [in] Access mode */
1516               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1517               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1518               DWORD count        /* [in] Number of bytes to map */
1519 ) {
1520     return MapViewOfFileEx( mapping, access, offset_high,
1521                             offset_low, count, NULL );
1522 }
1523
1524
1525 /***********************************************************************
1526  *             MapViewOfFileEx   (KERNEL32.@)
1527  * Maps a view of a file into the address space
1528  *
1529  * RETURNS
1530  *      Starting address of mapped view
1531  *      NULL: Failure
1532  */
1533 LPVOID WINAPI MapViewOfFileEx(
1534               HANDLE handle,   /* [in] File-mapping object to map */
1535               DWORD access,      /* [in] Access mode */
1536               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1537               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1538               DWORD count,       /* [in] Number of bytes to map */
1539               LPVOID addr        /* [in] Suggested starting address for mapped view */
1540 ) {
1541     FILE_VIEW *view;
1542     UINT size = 0;
1543     int flags = MAP_PRIVATE;
1544     int unix_handle = -1;
1545     int prot, res;
1546     void *base, *ptr = (void *)-1, *ret;
1547     DWORD size_low, size_high, header_size, shared_size;
1548     HANDLE shared_file;
1549     BOOL removable;
1550
1551     /* Check parameters */
1552
1553     if ((offset_low & granularity_mask) ||
1554         (addr && ((UINT_PTR)addr & granularity_mask)))
1555     {
1556         SetLastError( ERROR_INVALID_PARAMETER );
1557         return NULL;
1558     }
1559
1560     SERVER_START_REQ( get_mapping_info )
1561     {
1562         req->handle = handle;
1563         res = wine_server_call_err( req );
1564         prot        = reply->protect;
1565         base        = reply->base;
1566         size_low    = reply->size_low;
1567         size_high   = reply->size_high;
1568         header_size = reply->header_size;
1569         shared_file = reply->shared_file;
1570         shared_size = reply->shared_size;
1571         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1572                        reply->drive_type == DRIVE_CDROM);
1573     }
1574     SERVER_END_REQ;
1575     if (res) goto error;
1576
1577     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1578
1579     if (prot & VPROT_IMAGE)
1580         return map_image( handle, unix_handle, base, size_low, header_size,
1581                           shared_file, shared_size, removable );
1582
1583
1584     if (size_high)
1585         ERR("Sizes larger than 4Gb not supported\n");
1586
1587     if ((offset_low >= size_low) ||
1588         (count > size_low - offset_low))
1589     {
1590         SetLastError( ERROR_INVALID_PARAMETER );
1591         goto error;
1592     }
1593     if (count) size = ROUND_SIZE( offset_low, count );
1594     else size = size_low - offset_low;
1595
1596     switch(access)
1597     {
1598     case FILE_MAP_ALL_ACCESS:
1599     case FILE_MAP_WRITE:
1600     case FILE_MAP_WRITE | FILE_MAP_READ:
1601         if (!(prot & VPROT_WRITE))
1602         {
1603             SetLastError( ERROR_INVALID_PARAMETER );
1604             goto error;
1605         }
1606         flags = MAP_SHARED;
1607         /* fall through */
1608     case FILE_MAP_READ:
1609     case FILE_MAP_COPY:
1610     case FILE_MAP_COPY | FILE_MAP_READ:
1611         if (prot & VPROT_READ) break;
1612         /* fall through */
1613     default:
1614         SetLastError( ERROR_INVALID_PARAMETER );
1615         goto error;
1616     }
1617
1618     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1619      * which has a view of this mapping commits some pages, they will
1620      * appear commited in all other processes, which have the same
1621      * view created. Since we don`t support this yet, we create the
1622      * whole mapping commited.
1623      */
1624     prot |= VPROT_COMMITTED;
1625
1626     /* Reserve a properly aligned area */
1627
1628     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1629
1630     /* Map the file */
1631
1632     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1633
1634     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1635                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1636     if (ret != ptr)
1637     {
1638         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1639         goto error;
1640     }
1641     if (removable) handle = 0;  /* don't keep handle open on removable media */
1642
1643     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1644     {
1645         SetLastError( ERROR_OUTOFMEMORY );
1646         goto error;
1647     }
1648     if (unix_handle != -1) close( unix_handle );
1649     return ptr;
1650
1651 error:
1652     if (unix_handle != -1) close( unix_handle );
1653     if (ptr != (void *)-1) munmap( ptr, size );
1654     return NULL;
1655 }
1656
1657
1658 /***********************************************************************
1659  *             FlushViewOfFile   (KERNEL32.@)
1660  * Writes to the disk a byte range within a mapped view of a file
1661  *
1662  * RETURNS
1663  *      TRUE: Success
1664  *      FALSE: Failure
1665  */
1666 BOOL WINAPI FlushViewOfFile(
1667               LPCVOID base, /* [in] Start address of byte range to flush */
1668               DWORD cbFlush /* [in] Number of bytes in range */
1669 ) {
1670     FILE_VIEW *view;
1671     void *addr = ROUND_ADDR( base, page_mask );
1672
1673     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1674                      base, cbFlush );
1675
1676     if (!(view = VIRTUAL_FindView( addr )))
1677     {
1678         SetLastError( ERROR_INVALID_PARAMETER );
1679         return FALSE;
1680     }
1681     if (!cbFlush) cbFlush = view->size;
1682     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1683     SetLastError( ERROR_INVALID_PARAMETER );
1684     return FALSE;
1685 }
1686
1687
1688 /***********************************************************************
1689  *             UnmapViewOfFile   (KERNEL32.@)
1690  * Unmaps a mapped view of a file.
1691  *
1692  * NOTES
1693  *      Should addr be an LPCVOID?
1694  *
1695  * RETURNS
1696  *      TRUE: Success
1697  *      FALSE: Failure
1698  */
1699 BOOL WINAPI UnmapViewOfFile(
1700               LPVOID addr /* [in] Address where mapped view begins */
1701 ) {
1702     FILE_VIEW *view;
1703     void *base = ROUND_ADDR( addr, page_mask );
1704     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1705     {
1706         SetLastError( ERROR_INVALID_PARAMETER );
1707         return FALSE;
1708     }
1709     VIRTUAL_DeleteView( view );
1710     return TRUE;
1711 }