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 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <sys/types.h>
  37 #ifdef HAVE_SYS_MMAN_H
  38 #include <sys/mman.h>
  39 #endif
  40 #include "winnls.h"
  41 #include "winbase.h"
  42 #include "wine/exception.h"
  43 #include "wine/unicode.h"
  44 #include "wine/library.h"
  45 #include "winerror.h"
  46 #include "file.h"
  47 #include "global.h"
  48 #include "wine/server.h"
  49 #include "msvcrt/excpt.h"
  50 #include "wine/debug.h"
  51
  52 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
  53 WINE_DECLARE_DEBUG_CHANNEL(module);
  54
  55 #ifndef MS_SYNC
  56 #define MS_SYNC 0
  57 #endif
  58
  59 /* File view */
  60 typedef struct _FV
  61 {
  62     struct _FV   *next;        /* Next view */
  63     struct _FV   *prev;        /* Prev view */
  64     void         *base;        /* Base address */
  65     UINT          size;        /* Size in bytes */
  66     UINT          flags;       /* Allocation flags */
  67     HANDLE        mapping;     /* Handle to the file mapping */
  68     HANDLERPROC   handlerProc; /* Fault handler */
  69     LPVOID        handlerArg;  /* Fault handler argument */
  70     BYTE          protect;     /* Protection for all pages at allocation time */
  71     BYTE          prot[1];     /* Protection byte for each page */
  72 } FILE_VIEW;
  73
  74 /* Per-view flags */
  75 #define VFLAG_SYSTEM     0x01
  76 #define VFLAG_VALLOC     0x02  /* allocated by VirtualAlloc */
  77
  78 /* Conversion from VPROT_* to Win32 flags */
  79 static const BYTE VIRTUAL_Win32Flags[16] =
  80 {
  81     PAGE_NOACCESS,              /* 0 */
  82     PAGE_READONLY,              /* READ */
  83     PAGE_READWRITE,             /* WRITE */
  84     PAGE_READWRITE,             /* READ | WRITE */
  85     PAGE_EXECUTE,               /* EXEC */
  86     PAGE_EXECUTE_READ,          /* READ | EXEC */
  87     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  88     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  89     PAGE_WRITECOPY,             /* WRITECOPY */
  90     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  91     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  92     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  93     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  94     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  95     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  96     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  97 };
  98
  99
 100 static FILE_VIEW *VIRTUAL_FirstView;
 101 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
 102
 103 #ifdef __i386__
 104 /* These are always the same on an i386, and it will be faster this way */
 105 # define page_mask  0xfff
 106 # define page_shift 12
 107 # define page_size  0x1000
 108 #else
 109 static UINT page_shift;
 110 static UINT page_mask;
 111 static UINT page_size;
 112 #endif  /* __i386__ */
 113 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
 114
 115 #define ADDRESS_SPACE_LIMIT  ((void *)0xc0000000)  /* top of the user address space */
 116
 117 #define ROUND_ADDR(addr,mask) \
 118    ((void *)((UINT_PTR)(addr) & ~(mask)))
 119
 120 #define ROUND_SIZE(addr,size) \
 121    (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
 122
 123 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 124    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 125
 126 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
 127                             DWORD offset_high, int prot, int flags, BOOL *removable );
 128
 129 /* filter for page-fault exceptions */
 130 static WINE_EXCEPTION_FILTER(page_fault)
 131 {
 132     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 133         return EXCEPTION_EXECUTE_HANDLER;
 134     return EXCEPTION_CONTINUE_SEARCH;
 135 }
 136
 137 /***********************************************************************
 138  *           VIRTUAL_GetProtStr
 139  */
 140 static const char *VIRTUAL_GetProtStr( BYTE prot )
 141 {
 142     static char buffer[6];
 143     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 144     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 145     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 146     buffer[3] = (prot & VPROT_WRITE) ?
 147                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 148     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 149     buffer[5] = 0;
 150     return buffer;
 151 }
 152
 153
 154 /***********************************************************************
 155  *           VIRTUAL_DumpView
 156  */
 157 static void VIRTUAL_DumpView( FILE_VIEW *view )
 158 {
 159     UINT i, count;
 160     char *addr = view->base;
 161     BYTE prot = view->prot[0];
 162
 163     DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
 164     if (view->flags & VFLAG_SYSTEM)
 165         DPRINTF( " (system)\n" );
 166     else if (view->flags & VFLAG_VALLOC)
 167         DPRINTF( " (valloc)\n" );
 168     else if (view->mapping)
 169         DPRINTF( " %d\n", view->mapping );
 170     else
 171         DPRINTF( " (anonymous)\n");
 172
 173     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 174     {
 175         if (view->prot[i] == prot) continue;
 176         DPRINTF( "      %p - %p %s\n",
 177                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 178         addr += (count << page_shift);
 179         prot = view->prot[i];
 180         count = 0;
 181     }
 182     if (count)
 183         DPRINTF( "      %p - %p %s\n",
 184                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 185 }
 186
 187
 188 /***********************************************************************
 189  *           VIRTUAL_Dump
 190  */
 191 void VIRTUAL_Dump(void)
 192 {
 193     FILE_VIEW *view;
 194     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 195     EnterCriticalSection(&csVirtual);
 196     view = VIRTUAL_FirstView;
 197     while (view)
 198     {
 199         VIRTUAL_DumpView( view );
 200         view = view->next;
 201     }
 202     LeaveCriticalSection(&csVirtual);
 203 }
 204
 205
 206 /***********************************************************************
 207  *           VIRTUAL_FindView
 208  *
 209  * Find the view containing a given address.
 210  *
 211  * RETURNS
 212  *      View: Success
 213  *      NULL: Failure
 214  */
 215 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
 216 {
 217     FILE_VIEW *view;
 218
 219     EnterCriticalSection(&csVirtual);
 220     view = VIRTUAL_FirstView;
 221     while (view)
 222     {
 223         if (view->base > addr)
 224         {
 225             view = NULL;
 226             break;
 227         }
 228         if ((char*)view->base + view->size > (char*)addr) break;
 229         view = view->next;
 230     }
 231     LeaveCriticalSection(&csVirtual);
 232     return view;
 233 }
 234
 235
 236 /***********************************************************************
 237  *           VIRTUAL_CreateView
 238  *
 239  * Create a new view and add it in the linked list.
 240  */
 241 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
 242                                       BYTE vprot, HANDLE mapping )
 243 {
 244     FILE_VIEW *view, *prev;
 245
 246     /* Create the view structure */
 247
 248     assert( !((unsigned int)base & page_mask) );
 249     assert( !(size & page_mask) );
 250     size >>= page_shift;
 251     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 252     view->base    = base;
 253     view->size    = size << page_shift;
 254     view->flags   = flags;
 255     view->mapping = mapping;
 256     view->protect = vprot;
 257     view->handlerProc = NULL;
 258     memset( view->prot, vprot, size );
 259
 260     /* Duplicate the mapping handle */
 261
 262     if (view->mapping &&
 263         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 264                           GetCurrentProcess(), &view->mapping,
 265                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 266     {
 267         free( view );
 268         return NULL;
 269     }
 270
 271     /* Insert it in the linked list */
 272
 273     EnterCriticalSection(&csVirtual);
 274     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 275     {
 276         view->next = VIRTUAL_FirstView;
 277         view->prev = NULL;
 278         if (view->next) view->next->prev = view;
 279         VIRTUAL_FirstView = view;
 280     }
 281     else
 282     {
 283         prev = VIRTUAL_FirstView;
 284         while (prev->next && (prev->next->base < base)) prev = prev->next;
 285         view->next = prev->next;
 286         view->prev = prev;
 287         if (view->next) view->next->prev = view;
 288         prev->next  = view;
 289     }
 290     LeaveCriticalSection(&csVirtual);
 291     VIRTUAL_DEBUG_DUMP_VIEW( view );
 292     return view;
 293 }
 294
 295
 296 /***********************************************************************
 297  *           VIRTUAL_DeleteView
 298  * Deletes a view.
 299  *
 300  * RETURNS
 301  *      None
 302  */
 303 static void VIRTUAL_DeleteView(
 304             FILE_VIEW *view /* [in] View */
 305 ) {
 306     if (!(view->flags & VFLAG_SYSTEM))
 307         munmap( (void *)view->base, view->size );
 308     EnterCriticalSection(&csVirtual);
 309     if (view->next) view->next->prev = view->prev;
 310     if (view->prev) view->prev->next = view->next;
 311     else VIRTUAL_FirstView = view->next;
 312     LeaveCriticalSection(&csVirtual);
 313     if (view->mapping) NtClose( view->mapping );
 314     free( view );
 315 }
 316
 317
 318 /***********************************************************************
 319  *           VIRTUAL_GetUnixProt
 320  *
 321  * Convert page protections to protection for mmap/mprotect.
 322  */
 323 static int VIRTUAL_GetUnixProt( BYTE vprot )
 324 {
 325     int prot = 0;
 326     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 327     {
 328         if (vprot & VPROT_READ) prot |= PROT_READ;
 329         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 330         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 331         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 332     }
 333     return prot;
 334 }
 335
 336
 337 /***********************************************************************
 338  *           VIRTUAL_GetWin32Prot
 339  *
 340  * Convert page protections to Win32 flags.
 341  *
 342  * RETURNS
 343  *      None
 344  */
 345 static void VIRTUAL_GetWin32Prot(
 346             BYTE vprot,     /* [in] Page protection flags */
 347             DWORD *protect, /* [out] Location to store Win32 protection flags */
 348             DWORD *state    /* [out] Location to store mem state flag */
 349 ) {
 350     if (protect) {
 351         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 352 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 353         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 354
 355         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 356     }
 357
 358     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 359 }
 360
 361
 362 /***********************************************************************
 363  *           VIRTUAL_GetProt
 364  *
 365  * Build page protections from Win32 flags.
 366  *
 367  * RETURNS
 368  *      Value of page protection flags
 369  */
 370 static BYTE VIRTUAL_GetProt(
 371             DWORD protect  /* [in] Win32 protection flags */
 372 ) {
 373     BYTE vprot;
 374
 375     switch(protect & 0xff)
 376     {
 377     case PAGE_READONLY:
 378         vprot = VPROT_READ;
 379         break;
 380     case PAGE_READWRITE:
 381         vprot = VPROT_READ | VPROT_WRITE;
 382         break;
 383     case PAGE_WRITECOPY:
 384         /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
 385          * that the hFile must have been opened with GENERIC_READ and
 386          * GENERIC_WRITE access.  This is WRONG as tests show that you
 387          * only need GENERIC_READ access (at least for Win9x,
 388          * FIXME: what about NT?).  Thus, we don't put VPROT_WRITE in
 389          * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
 390          */
 391         vprot = VPROT_READ | VPROT_WRITECOPY;
 392         break;
 393     case PAGE_EXECUTE:
 394         vprot = VPROT_EXEC;
 395         break;
 396     case PAGE_EXECUTE_READ:
 397         vprot = VPROT_EXEC | VPROT_READ;
 398         break;
 399     case PAGE_EXECUTE_READWRITE:
 400         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 401         break;
 402     case PAGE_EXECUTE_WRITECOPY:
 403         /* See comment for PAGE_WRITECOPY above */
 404         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
 405         break;
 406     case PAGE_NOACCESS:
 407     default:
 408         vprot = 0;
 409         break;
 410     }
 411     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 412     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 413     return vprot;
 414 }
 415
 416
 417 /***********************************************************************
 418  *           VIRTUAL_SetProt
 419  *
 420  * Change the protection of a range of pages.
 421  *
 422  * RETURNS
 423  *      TRUE: Success
 424  *      FALSE: Failure
 425  */
 426 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
 427                              void *base,      /* [in] Starting address */
 428                              UINT size,       /* [in] Size in bytes */
 429                              BYTE vprot )     /* [in] Protections to use */
 430 {
 431     TRACE("%p-%p %s\n",
 432           base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 433
 434     if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
 435         return FALSE;  /* FIXME: last error */
 436
 437     memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
 438             vprot, size >> page_shift );
 439     VIRTUAL_DEBUG_DUMP_VIEW( view );
 440     return TRUE;
 441 }
 442
 443
 444 /***********************************************************************
 445  *           anon_mmap_aligned
 446  *
 447  * Create an anonymous mapping aligned to the allocation granularity.
 448  */
 449 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
 450 {
 451     void *ptr;
 452     unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
 453
 454     if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
 455     {
 456         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
 457          * Platform Differences":
 458          * Windows NT: ERROR_INVALID_PARAMETER
 459          * Windows 95: ERROR_INVALID_ADDRESS.
 460          */
 461         if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
 462         else
 463         {
 464             if (GetVersion() & 0x80000000)  /* win95 */
 465                 SetLastError( ERROR_INVALID_ADDRESS );
 466             else
 467                 SetLastError( ERROR_INVALID_PARAMETER );
 468         }
 469         return ptr;
 470     }
 471
 472     if (!base)
 473     {
 474         /* Release the extra memory while keeping the range
 475          * starting on the granularity boundary. */
 476         if ((unsigned int)ptr & granularity_mask)
 477         {
 478             unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
 479             munmap( ptr, extra );
 480             ptr = (char *)ptr + extra;
 481             view_size -= extra;
 482         }
 483         if (view_size > size)
 484             munmap( (char *)ptr + size, view_size - size );
 485     }
 486     else if (ptr != base)
 487     {
 488         /* We couldn't get the address we wanted */
 489         munmap( ptr, view_size );
 490         SetLastError( ERROR_INVALID_ADDRESS );
 491         ptr = (void *)-1;
 492     }
 493     return ptr;
 494 }
 495
 496
 497 /***********************************************************************
 498  *           do_relocations
 499  *
 500  * Apply the relocations to a mapped PE image
 501  */
 502 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
 503                            int delta, DWORD total_size )
 504 {
 505     IMAGE_BASE_RELOCATION *rel;
 506
 507     TRACE_(module)( "relocating from %p-%p to %p-%p\n",
 508                     base - delta, base - delta + total_size, base, base + total_size );
 509
 510     for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
 511          ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
 512          rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
 513     {
 514         char *page = base + rel->VirtualAddress;
 515         WORD *TypeOffset = (WORD *)(rel + 1);
 516         int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
 517
 518         if (!count) continue;
 519
 520         /* sanity checks */
 521         if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
 522             page > base + total_size)
 523         {
 524             ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
 525                          rel, rel->VirtualAddress, rel->SizeOfBlock,
 526                          base, dir->VirtualAddress, dir->Size );
 527             return 0;
 528         }
 529
 530         TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
 531
 532         /* patching in reverse order */
 533         for (i = 0 ; i < count; i++)
 534         {
 535             int offset = TypeOffset[i] & 0xFFF;
 536             int type = TypeOffset[i] >> 12;
 537             switch(type)
 538             {
 539             case IMAGE_REL_BASED_ABSOLUTE:
 540                 break;
 541             case IMAGE_REL_BASED_HIGH:
 542                 *(short*)(page+offset) += HIWORD(delta);
 543                 break;
 544             case IMAGE_REL_BASED_LOW:
 545                 *(short*)(page+offset) += LOWORD(delta);
 546                 break;
 547             case IMAGE_REL_BASED_HIGHLOW:
 548                 *(int*)(page+offset) += delta;
 549                 /* FIXME: if this is an exported address, fire up enhanced logic */
 550                 break;
 551             default:
 552                 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
 553                 break;
 554             }
 555         }
 556     }
 557     return 1;
 558 }
 559
 560
 561 /***********************************************************************
 562  *           map_image
 563  *
 564  * Map an executable (PE format) image into memory.
 565  */
 566 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 567                          DWORD header_size, HANDLE shared_file, DWORD shared_size,
 568                          BOOL removable )
 569 {
 570     IMAGE_DOS_HEADER *dos;
 571     IMAGE_NT_HEADERS *nt;
 572     IMAGE_SECTION_HEADER *sec;
 573     IMAGE_DATA_DIRECTORY *imports;
 574     int i, pos;
 575     DWORD err = GetLastError();
 576     FILE_VIEW *view;
 577     char *ptr;
 578     int shared_fd = -1;
 579
 580     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 581
 582     /* zero-map the whole range */
 583
 584     if (base < (char *)0x110000 ||  /* make sure the DOS area remains free */
 585         (ptr = wine_anon_mmap( base, total_size,
 586                                PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 587     {
 588         ptr = wine_anon_mmap( NULL, total_size,
 589                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 590         if (ptr == (char *)-1)
 591         {
 592             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 593             goto error;
 594         }
 595     }
 596     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 597
 598     /* map the header */
 599
 600     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 601                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 602     dos = (IMAGE_DOS_HEADER *)ptr;
 603     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 604     if ((char *)(nt + 1) > ptr + header_size) goto error;
 605
 606     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 607     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 608
 609     imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
 610     if (!imports->Size || !imports->VirtualAddress) imports = NULL;
 611
 612     /* check the architecture */
 613
 614     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 615     {
 616         MESSAGE("Trying to load PE image for unsupported architecture (");
 617         switch (nt->FileHeader.Machine)
 618         {
 619         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 620         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 621         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 622         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 623         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 624         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 625         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 626         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 627         }
 628         MESSAGE(")\n");
 629         goto error;
 630     }
 631
 632     /* retrieve the shared sections file */
 633
 634     if (shared_size)
 635     {
 636         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 637         CloseHandle( shared_file );  /* we no longer need it */
 638         shared_file = 0;
 639     }
 640
 641     /* map all the sections */
 642
 643     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 644     {
 645         DWORD size;
 646
 647         /* a few sanity checks */
 648         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 649         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 650         {
 651             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 652                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 653             goto error;
 654         }
 655
 656         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 657             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 658         {
 659             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 660             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 661                           sec->Name, ptr + sec->VirtualAddress,
 662                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 663                           size, sec->Characteristics );
 664             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 665                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 666                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 667             {
 668                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 669                 goto error;
 670             }
 671
 672             /* check if the import directory falls inside this section */
 673             if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 674                 imports->VirtualAddress < sec->VirtualAddress + size)
 675             {
 676                 UINT_PTR base = imports->VirtualAddress & ~page_mask;
 677                 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
 678                 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
 679                 if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
 680                                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 681                                               MAP_PRIVATE|MAP_FIXED, NULL );
 682             }
 683             pos += size;
 684             continue;
 685         }
 686
 687         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 688                         sec->Name, ptr + sec->VirtualAddress,
 689                         sec->PointerToRawData, sec->SizeOfRawData,
 690                         sec->Characteristics );
 691
 692         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 693         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 694
 695         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 696          *       fall back to read(), so we don't need to check anything here.
 697          */
 698         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 699                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 700                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 701         {
 702             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 703             goto error;
 704         }
 705
 706         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 707         {
 708             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 709             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 710             TRACE_(module)("clearing %p - %p\n",
 711                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 712                            ptr + sec->VirtualAddress + end );
 713             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 714                     end - sec->SizeOfRawData );
 715         }
 716     }
 717
 718
 719     /* perform base relocation, if necessary */
 720
 721     if (ptr != base)
 722     {
 723         const IMAGE_DATA_DIRECTORY *relocs;
 724
 725         relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
 726         if (!relocs->VirtualAddress || !relocs->Size)
 727         {
 728             if (nt->OptionalHeader.ImageBase == 0x400000)
 729                 ERR("Standard load address for a Win32 program (0x00400000) not available - security-patched kernel ?\n");
 730             else
 731                 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
 732                      nt->OptionalHeader.ImageBase );
 733             SetLastError( ERROR_BAD_EXE_FORMAT );
 734             goto error;
 735         }
 736
 737         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
 738          *        really make sure that the *new* base address is also > 2GB.
 739          *        Some DLLs really check the MSB of the module handle :-/
 740          */
 741         if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
 742             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
 743
 744         if (!do_relocations( ptr, relocs, ptr - base, total_size ))
 745         {
 746             SetLastError( ERROR_BAD_EXE_FORMAT );
 747             goto error;
 748         }
 749     }
 750
 751     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 752     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0, VPROT_COMMITTED|VPROT_READ, hmapping )))
 753     {
 754         SetLastError( ERROR_OUTOFMEMORY );
 755         goto error;
 756     }
 757
 758     /* set the image protections */
 759
 760     sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 761     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 762     {
 763         DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 764         BYTE vprot = VPROT_COMMITTED;
 765         if (sec->Characteristics & IMAGE_SCN_MEM_READ)    vprot |= VPROT_READ;
 766         if (sec->Characteristics & IMAGE_SCN_MEM_WRITE)   vprot |= VPROT_WRITE|VPROT_WRITECOPY;
 767         if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
 768
 769         /* make sure the import directory is writable */
 770         if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 771             imports->VirtualAddress < sec->VirtualAddress + size)
 772             vprot |= VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY;
 773
 774         VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
 775     }
 776
 777     SetLastError( err );  /* restore last error */
 778     close( fd );
 779     if (shared_fd != -1) close( shared_fd );
 780     return ptr;
 781
 782  error:
 783     if (ptr != (char *)-1) munmap( ptr, total_size );
 784     close( fd );
 785     if (shared_fd != -1) close( shared_fd );
 786     if (shared_file) CloseHandle( shared_file );
 787     return NULL;
 788 }
 789
 790
 791 /***********************************************************************
 792  *           VIRTUAL_Init
 793  */
 794 #ifndef page_mask
 795 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 796 {
 797     page_size = getpagesize();
 798     page_mask = page_size - 1;
 799     /* Make sure we have a power of 2 */
 800     assert( !(page_size & page_mask) );
 801     page_shift = 0;
 802     while ((1 << page_shift) != page_size) page_shift++;
 803 }
 804 #endif  /* page_mask */
 805
 806
 807 /***********************************************************************
 808  *           VIRTUAL_SetFaultHandler
 809  */
 810 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 811 {
 812     FILE_VIEW *view;
 813
 814     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 815     view->handlerProc = proc;
 816     view->handlerArg  = arg;
 817     return TRUE;
 818 }
 819
 820 /***********************************************************************
 821  *           VIRTUAL_HandleFault
 822  */
 823 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 824 {
 825     FILE_VIEW *view = VIRTUAL_FindView( addr );
 826     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 827
 828     if (view)
 829     {
 830         if (view->handlerProc)
 831         {
 832             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 833         }
 834         else
 835         {
 836             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 837             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 838             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 839             if (vprot & VPROT_GUARD)
 840             {
 841                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 842                 ret = STATUS_GUARD_PAGE_VIOLATION;
 843             }
 844             /* is it inside the stack guard pages? */
 845             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 846                 ret = STATUS_STACK_OVERFLOW;
 847         }
 848     }
 849     return ret;
 850 }
 851
 852
 853
 854 /***********************************************************************
 855  *           unaligned_mmap
 856  *
 857  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 858  * long as the offset is aligned to the filesystem block size. This is
 859  * a big performance gain so we want to take advantage of it.
 860  *
 861  * However, when we use 64-bit file support this doesn't work because
 862  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 863  * in that it rounds unaligned offsets down to a page boundary. For
 864  * these reasons we do a direct system call here.
 865  */
 866 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 867                              unsigned int flags, int fd, unsigned int offset_low,
 868                              unsigned int offset_high )
 869 {
 870 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 871     if (!offset_high && (offset_low & page_mask))
 872     {
 873         int ret;
 874
 875         struct
 876         {
 877             void        *addr;
 878             unsigned int length;
 879             unsigned int prot;
 880             unsigned int flags;
 881             unsigned int fd;
 882             unsigned int offset;
 883         } args;
 884
 885         args.addr   = addr;
 886         args.length = length;
 887         args.prot   = prot;
 888         args.flags  = flags;
 889         args.fd     = fd;
 890         args.offset = offset_low;
 891
 892         __asm__ __volatile__("push %%ebx\n\t"
 893                              "movl %2,%%ebx\n\t"
 894                              "int $0x80\n\t"
 895                              "popl %%ebx"
 896                              : "=a" (ret)
 897                              : "0" (90), /* SYS_mmap */
 898                                "g" (&args) );
 899         if (ret < 0 && ret > -4096)
 900         {
 901             errno = -ret;
 902             ret = -1;
 903         }
 904         return (void *)ret;
 905     }
 906 #endif
 907     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 908 }
 909
 910
 911 /***********************************************************************
 912  *           VIRTUAL_mmap
 913  *
 914  * Wrapper for mmap() that handles anonymous mappings portably,
 915  * and falls back to read if mmap of a file fails.
 916  */
 917 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 918                             DWORD offset_low, DWORD offset_high,
 919                             int prot, int flags, BOOL *removable )
 920 {
 921     int pos;
 922     LPVOID ret;
 923     off_t offset;
 924     BOOL is_shared_write = FALSE;
 925
 926     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 927
 928     if (prot & PROT_WRITE)
 929     {
 930 #ifdef MAP_SHARED
 931         if (flags & MAP_SHARED) is_shared_write = TRUE;
 932 #endif
 933 #ifdef MAP_PRIVATE
 934         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 935 #endif
 936     }
 937
 938     if (removable && *removable)
 939     {
 940         /* if on removable media, try using read instead of mmap */
 941         if (!is_shared_write) goto fake_mmap;
 942         *removable = FALSE;
 943     }
 944
 945     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 946                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 947
 948     /* mmap() failed; if this is because the file offset is not    */
 949     /* page-aligned (EINVAL), or because the underlying filesystem */
 950     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 951
 952     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 953     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 954
 955  fake_mmap:
 956     /* Reserve the memory with an anonymous mmap */
 957     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 958     if (ret == (LPVOID)-1) return ret;
 959     /* Now read in the file */
 960     offset = ((off_t)offset_high << 32) | offset_low;
 961     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 962     {
 963         munmap( ret, size );
 964         return (LPVOID)-1;
 965     }
 966     read( fd, ret, size );
 967     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 968     mprotect( ret, size, prot );  /* Set the right protection */
 969     return ret;
 970 }
 971
 972
 973 /***********************************************************************
 974  *             VirtualAlloc   (KERNEL32.@)
 975  * Reserves or commits a region of pages in virtual address space
 976  *
 977  * RETURNS
 978  *      Base address of allocated region of pages
 979  *      NULL: Failure
 980  */
 981 LPVOID WINAPI VirtualAlloc(
 982               LPVOID addr,  /* [in] Address of region to reserve or commit */
 983               DWORD size,   /* [in] Size of region */
 984               DWORD type,   /* [in] Type of allocation */
 985               DWORD protect)/* [in] Type of access protection */
 986 {
 987     FILE_VIEW *view;
 988     char *ptr, *base;
 989     BYTE vprot;
 990
 991     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 992
 993     /* Round parameters to a page boundary */
 994
 995     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 996     {
 997         SetLastError( ERROR_OUTOFMEMORY );
 998         return NULL;
 999     }
1000     if (addr)
1001     {
1002         if (type & MEM_RESERVE) /* Round down to 64k boundary */
1003             base = ROUND_ADDR( addr, granularity_mask );
1004         else
1005             base = ROUND_ADDR( addr, page_mask );
1006         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1007
1008         /* disallow low 64k, wrap-around and kernel space */
1009         if ((base <= (char *)granularity_mask) ||
1010             (base + size < base) ||
1011             (base + size > (char *)ADDRESS_SPACE_LIMIT))
1012         {
1013             SetLastError( ERROR_INVALID_PARAMETER );
1014             return NULL;
1015         }
1016     }
1017     else
1018     {
1019         base = 0;
1020         size = (size + page_mask) & ~page_mask;
1021     }
1022
1023     if (type & MEM_TOP_DOWN) {
1024         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
1025          *        Is there _ANY_ way to do it with UNIX mmap()?
1026          */
1027         WARN("MEM_TOP_DOWN ignored\n");
1028         type &= ~MEM_TOP_DOWN;
1029     }
1030     /* Compute the alloc type flags */
1031
1032     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
1033         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
1034     {
1035         ERR("called with wrong alloc type flags (%08lx) !\n", type);
1036         SetLastError( ERROR_INVALID_PARAMETER );
1037         return NULL;
1038     }
1039     if (type & (MEM_COMMIT | MEM_SYSTEM))
1040         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
1041     else vprot = 0;
1042
1043     /* Reserve the memory */
1044
1045     if ((type & MEM_RESERVE) || !base)
1046     {
1047         if (type & MEM_SYSTEM)
1048         {
1049             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
1050             {
1051                 SetLastError( ERROR_OUTOFMEMORY );
1052                 return NULL;
1053             }
1054             return (LPVOID)base;
1055         }
1056         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
1057         if (ptr == (void *)-1) return NULL;
1058
1059         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
1060         {
1061             munmap( ptr, size );
1062             SetLastError( ERROR_OUTOFMEMORY );
1063             return NULL;
1064         }
1065         return ptr;
1066     }
1067
1068     /* Commit the pages */
1069
1070     if (!(view = VIRTUAL_FindView( base )) ||
1071         (base + size > (char *)view->base + view->size))
1072     {
1073         SetLastError( ERROR_INVALID_ADDRESS );
1074         return NULL;
1075     }
1076
1077     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
1078     return (LPVOID)base;
1079 }
1080
1081
1082 /***********************************************************************
1083  *             VirtualAllocEx   (KERNEL32.@)
1084  *
1085  * Seems to be just as VirtualAlloc, but with process handle.
1086  */
1087 LPVOID WINAPI VirtualAllocEx(
1088               HANDLE hProcess, /* [in] Handle of process to do mem operation */
1089               LPVOID addr,  /* [in] Address of region to reserve or commit */
1090               DWORD size,   /* [in] Size of region */
1091               DWORD type,   /* [in] Type of allocation */
1092               DWORD protect /* [in] Type of access protection */
1093 ) {
1094     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
1095         return VirtualAlloc( addr, size, type, protect );
1096     ERR("Unsupported on other process\n");
1097     return NULL;
1098 }
1099
1100
1101 /***********************************************************************
1102  *             VirtualFree   (KERNEL32.@)
1103  * Release or decommits a region of pages in virtual address space.
1104  *
1105  * RETURNS
1106  *      TRUE: Success
1107  *      FALSE: Failure
1108  */
1109 BOOL WINAPI VirtualFree(
1110               LPVOID addr, /* [in] Address of region of committed pages */
1111               DWORD size,  /* [in] Size of region */
1112               DWORD type   /* [in] Type of operation */
1113 ) {
1114     FILE_VIEW *view;
1115     char *base;
1116
1117     TRACE("%p %08lx %lx\n", addr, size, type );
1118
1119     /* Fix the parameters */
1120
1121     size = ROUND_SIZE( addr, size );
1122     base = ROUND_ADDR( addr, page_mask );
1123
1124     if (!(view = VIRTUAL_FindView( base )) ||
1125         (base + size > (char *)view->base + view->size) ||
1126         !(view->flags & VFLAG_VALLOC))
1127     {
1128         SetLastError( ERROR_INVALID_PARAMETER );
1129         return FALSE;
1130     }
1131
1132     /* Check the type */
1133
1134     if (type & MEM_SYSTEM)
1135     {
1136         view->flags |= VFLAG_SYSTEM;
1137         type &= ~MEM_SYSTEM;
1138     }
1139
1140     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
1141     {
1142         ERR("called with wrong free type flags (%08lx) !\n", type);
1143         SetLastError( ERROR_INVALID_PARAMETER );
1144         return FALSE;
1145     }
1146
1147     /* Free the pages */
1148
1149     if (type == MEM_RELEASE)
1150     {
1151         if (size || (base != view->base))
1152         {
1153             SetLastError( ERROR_INVALID_PARAMETER );
1154             return FALSE;
1155         }
1156         VIRTUAL_DeleteView( view );
1157         return TRUE;
1158     }
1159
1160     /* Decommit the pages by remapping zero-pages instead */
1161
1162     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1163         ERR( "Could not remap pages, expect trouble\n" );
1164     return VIRTUAL_SetProt( view, base, size, 0 );
1165 }
1166
1167
1168 /***********************************************************************
1169  *             VirtualLock   (KERNEL32.@)
1170  * Locks the specified region of virtual address space
1171  *
1172  * NOTE
1173  *      Always returns TRUE
1174  *
1175  * RETURNS
1176  *      TRUE: Success
1177  *      FALSE: Failure
1178  */
1179 BOOL WINAPI VirtualLock(
1180               LPVOID addr, /* [in] Address of first byte of range to lock */
1181               DWORD size   /* [in] Number of bytes in range to lock */
1182 ) {
1183     return TRUE;
1184 }
1185
1186
1187 /***********************************************************************
1188  *             VirtualUnlock   (KERNEL32.@)
1189  * Unlocks a range of pages in the virtual address space
1190  *
1191  * NOTE
1192  *      Always returns TRUE
1193  *
1194  * RETURNS
1195  *      TRUE: Success
1196  *      FALSE: Failure
1197  */
1198 BOOL WINAPI VirtualUnlock(
1199               LPVOID addr, /* [in] Address of first byte of range */
1200               DWORD size   /* [in] Number of bytes in range */
1201 ) {
1202     return TRUE;
1203 }
1204
1205
1206 /***********************************************************************
1207  *             VirtualProtect   (KERNEL32.@)
1208  * Changes the access protection on a region of committed pages
1209  *
1210  * RETURNS
1211  *      TRUE: Success
1212  *      FALSE: Failure
1213  */
1214 BOOL WINAPI VirtualProtect(
1215               LPVOID addr,     /* [in] Address of region of committed pages */
1216               DWORD size,      /* [in] Size of region */
1217               DWORD new_prot,  /* [in] Desired access protection */
1218               LPDWORD old_prot /* [out] Address of variable to get old protection */
1219 ) {
1220     FILE_VIEW *view;
1221     char *base;
1222     UINT i;
1223     BYTE vprot, *p;
1224     DWORD prot;
1225
1226     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1227
1228     /* Fix the parameters */
1229
1230     size = ROUND_SIZE( addr, size );
1231     base = ROUND_ADDR( addr, page_mask );
1232
1233     if (!(view = VIRTUAL_FindView( base )) ||
1234         (base + size > (char *)view->base + view->size))
1235     {
1236         SetLastError( ERROR_INVALID_PARAMETER );
1237         return FALSE;
1238     }
1239
1240     /* Make sure all the pages are committed */
1241
1242     p = view->prot + ((base - (char *)view->base) >> page_shift);
1243     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1244     for (i = size >> page_shift; i; i--, p++)
1245     {
1246         if (!(*p & VPROT_COMMITTED))
1247         {
1248             SetLastError( ERROR_INVALID_PARAMETER );
1249             return FALSE;
1250         }
1251     }
1252
1253     if (old_prot) *old_prot = prot;
1254     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1255     return VIRTUAL_SetProt( view, base, size, vprot );
1256 }
1257
1258
1259 /***********************************************************************
1260  *             VirtualProtectEx   (KERNEL32.@)
1261  * Changes the access protection on a region of committed pages in the
1262  * virtual address space of a specified process
1263  *
1264  * RETURNS
1265  *      TRUE: Success
1266  *      FALSE: Failure
1267  */
1268 BOOL WINAPI VirtualProtectEx(
1269               HANDLE handle, /* [in]  Handle of process */
1270               LPVOID addr,     /* [in]  Address of region of committed pages */
1271               DWORD size,      /* [in]  Size of region */
1272               DWORD new_prot,  /* [in]  Desired access protection */
1273               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1274 {
1275     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1276         return VirtualProtect( addr, size, new_prot, old_prot );
1277     ERR("Unsupported on other process\n");
1278     return FALSE;
1279 }
1280
1281
1282 /***********************************************************************
1283  *             VirtualQuery   (KERNEL32.@)
1284  * Provides info about a range of pages in virtual address space
1285  *
1286  * RETURNS
1287  *      Number of bytes returned in information buffer
1288  *      or 0 if addr is >= 0xc0000000 (kernel space).
1289  */
1290 DWORD WINAPI VirtualQuery(
1291              LPCVOID addr,                    /* [in]  Address of region */
1292              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1293              DWORD len                        /* [in]  Size of buffer */
1294 ) {
1295     FILE_VIEW *view;
1296     char *base, *alloc_base = 0;
1297     UINT size = 0;
1298
1299     if (addr >= ADDRESS_SPACE_LIMIT) return 0;
1300
1301     base = ROUND_ADDR( addr, page_mask );
1302
1303     /* Find the view containing the address */
1304
1305     EnterCriticalSection(&csVirtual);
1306     view = VIRTUAL_FirstView;
1307     for (;;)
1308     {
1309         if (!view)
1310         {
1311             size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1312             break;
1313         }
1314         if ((char *)view->base > base)
1315         {
1316             size = (char *)view->base - alloc_base;
1317             view = NULL;
1318             break;
1319         }
1320         if ((char *)view->base + view->size > base)
1321         {
1322             alloc_base = view->base;
1323             size = view->size;
1324             break;
1325         }
1326         alloc_base = (char *)view->base + view->size;
1327         view = view->next;
1328     }
1329     LeaveCriticalSection(&csVirtual);
1330
1331     /* Fill the info structure */
1332
1333     if (!view)
1334     {
1335         info->State             = MEM_FREE;
1336         info->Protect           = 0;
1337         info->AllocationProtect = 0;
1338         info->Type              = 0;
1339     }
1340     else
1341     {
1342         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1343         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1344         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1345             if (view->prot[size >> page_shift] != vprot) break;
1346         info->AllocationProtect = view->protect;
1347         info->Type              = MEM_PRIVATE;  /* FIXME */
1348     }
1349
1350     info->BaseAddress    = (LPVOID)base;
1351     info->AllocationBase = (LPVOID)alloc_base;
1352     info->RegionSize     = size - (base - alloc_base);
1353     return sizeof(*info);
1354 }
1355
1356
1357 /***********************************************************************
1358  *             VirtualQueryEx   (KERNEL32.@)
1359  * Provides info about a range of pages in virtual address space of a
1360  * specified process
1361  *
1362  * RETURNS
1363  *      Number of bytes returned in information buffer
1364  */
1365 DWORD WINAPI VirtualQueryEx(
1366              HANDLE handle,                 /* [in] Handle of process */
1367              LPCVOID addr,                    /* [in] Address of region */
1368              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1369              DWORD len                        /* [in] Size of buffer */ )
1370 {
1371     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1372         return VirtualQuery( addr, info, len );
1373     ERR("Unsupported on other process\n");
1374     return 0;
1375 }
1376
1377
1378 /***********************************************************************
1379  *             IsBadReadPtr   (KERNEL32.@)
1380  *
1381  * RETURNS
1382  *      FALSE: Process has read access to entire block
1383  *      TRUE: Otherwise
1384  */
1385 BOOL WINAPI IsBadReadPtr(
1386               LPCVOID ptr, /* [in] Address of memory block */
1387               UINT size )  /* [in] Size of block */
1388 {
1389     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1390     __TRY
1391     {
1392         volatile const char *p = ptr;
1393         char dummy;
1394         UINT count = size;
1395
1396         while (count > page_size)
1397         {
1398             dummy = *p;
1399             p += page_size;
1400             count -= page_size;
1401         }
1402         dummy = p[0];
1403         dummy = p[count - 1];
1404     }
1405     __EXCEPT(page_fault) { return TRUE; }
1406     __ENDTRY
1407     return FALSE;
1408 }
1409
1410
1411 /***********************************************************************
1412  *             IsBadWritePtr   (KERNEL32.@)
1413  *
1414  * RETURNS
1415  *      FALSE: Process has write access to entire block
1416  *      TRUE: Otherwise
1417  */
1418 BOOL WINAPI IsBadWritePtr(
1419               LPVOID ptr, /* [in] Address of memory block */
1420               UINT size ) /* [in] Size of block in bytes */
1421 {
1422     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1423     __TRY
1424     {
1425         volatile char *p = ptr;
1426         UINT count = size;
1427
1428         while (count > page_size)
1429         {
1430             *p |= 0;
1431             p += page_size;
1432             count -= page_size;
1433         }
1434         p[0] |= 0;
1435         p[count - 1] |= 0;
1436     }
1437     __EXCEPT(page_fault) { return TRUE; }
1438     __ENDTRY
1439     return FALSE;
1440 }
1441
1442
1443 /***********************************************************************
1444  *             IsBadHugeReadPtr   (KERNEL32.@)
1445  * RETURNS
1446  *      FALSE: Process has read access to entire block
1447  *      TRUE: Otherwise
1448  */
1449 BOOL WINAPI IsBadHugeReadPtr(
1450               LPCVOID ptr, /* [in] Address of memory block */
1451               UINT size  /* [in] Size of block */
1452 ) {
1453     return IsBadReadPtr( ptr, size );
1454 }
1455
1456
1457 /***********************************************************************
1458  *             IsBadHugeWritePtr   (KERNEL32.@)
1459  * RETURNS
1460  *      FALSE: Process has write access to entire block
1461  *      TRUE: Otherwise
1462  */
1463 BOOL WINAPI IsBadHugeWritePtr(
1464               LPVOID ptr, /* [in] Address of memory block */
1465               UINT size /* [in] Size of block */
1466 ) {
1467     return IsBadWritePtr( ptr, size );
1468 }
1469
1470
1471 /***********************************************************************
1472  *             IsBadCodePtr   (KERNEL32.@)
1473  *
1474  * RETURNS
1475  *      FALSE: Process has read access to specified memory
1476  *      TRUE: Otherwise
1477  */
1478 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1479 {
1480     return IsBadReadPtr( ptr, 1 );
1481 }
1482
1483
1484 /***********************************************************************
1485  *             IsBadStringPtrA   (KERNEL32.@)
1486  *
1487  * RETURNS
1488  *      FALSE: Read access to all bytes in string
1489  *      TRUE: Else
1490  */
1491 BOOL WINAPI IsBadStringPtrA(
1492               LPCSTR str, /* [in] Address of string */
1493               UINT max )  /* [in] Maximum size of string */
1494 {
1495     __TRY
1496     {
1497         volatile const char *p = str;
1498         while (p != str + max) if (!*p++) break;
1499     }
1500     __EXCEPT(page_fault) { return TRUE; }
1501     __ENDTRY
1502     return FALSE;
1503 }
1504
1505
1506 /***********************************************************************
1507  *             IsBadStringPtrW   (KERNEL32.@)
1508  * See IsBadStringPtrA
1509  */
1510 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1511 {
1512     __TRY
1513     {
1514         volatile const WCHAR *p = str;
1515         while (p != str + max) if (!*p++) break;
1516     }
1517     __EXCEPT(page_fault) { return TRUE; }
1518     __ENDTRY
1519     return FALSE;
1520 }
1521
1522
1523 /***********************************************************************
1524  *             CreateFileMappingA   (KERNEL32.@)
1525  * Creates a named or unnamed file-mapping object for the specified file
1526  *
1527  * RETURNS
1528  *      Handle: Success
1529  *      0: Mapping object does not exist
1530  *      NULL: Failure
1531  */
1532 HANDLE WINAPI CreateFileMappingA(
1533                 HANDLE hFile,   /* [in] Handle of file to map */
1534                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1535                 DWORD protect,   /* [in] Protection for mapping object */
1536                 DWORD size_high, /* [in] High-order 32 bits of object size */
1537                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1538                 LPCSTR name      /* [in] Name of file-mapping object */ )
1539 {
1540     WCHAR buffer[MAX_PATH];
1541
1542     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1543
1544     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1545     {
1546         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1547         return 0;
1548     }
1549     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1550 }
1551
1552
1553 /***********************************************************************
1554  *             CreateFileMappingW   (KERNEL32.@)
1555  * See CreateFileMappingA
1556  */
1557 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1558                                   DWORD protect, DWORD size_high,
1559                                   DWORD size_low, LPCWSTR name )
1560 {
1561     HANDLE ret;
1562     BYTE vprot;
1563     DWORD len = name ? strlenW(name) : 0;
1564
1565     /* Check parameters */
1566
1567     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1568           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1569
1570     if (len > MAX_PATH)
1571     {
1572         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1573         return 0;
1574     }
1575
1576     vprot = VIRTUAL_GetProt( protect );
1577     if (protect & SEC_RESERVE)
1578     {
1579         if (hFile != INVALID_HANDLE_VALUE)
1580         {
1581             SetLastError( ERROR_INVALID_PARAMETER );
1582             return 0;
1583         }
1584     }
1585     else vprot |= VPROT_COMMITTED;
1586     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1587     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1588
1589     /* Create the server object */
1590
1591     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1592     SERVER_START_REQ( create_mapping )
1593     {
1594         req->file_handle = hFile;
1595         req->size_high   = size_high;
1596         req->size_low    = size_low;
1597         req->protect     = vprot;
1598         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1599         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1600         SetLastError(0);
1601         wine_server_call_err( req );
1602         ret = reply->handle;
1603     }
1604     SERVER_END_REQ;
1605     return ret;
1606 }
1607
1608
1609 /***********************************************************************
1610  *             OpenFileMappingA   (KERNEL32.@)
1611  * Opens a named file-mapping object.
1612  *
1613  * RETURNS
1614  *      Handle: Success
1615  *      NULL: Failure
1616  */
1617 HANDLE WINAPI OpenFileMappingA(
1618                 DWORD access,   /* [in] Access mode */
1619                 BOOL inherit, /* [in] Inherit flag */
1620                 LPCSTR name )   /* [in] Name of file-mapping object */
1621 {
1622     WCHAR buffer[MAX_PATH];
1623
1624     if (!name) return OpenFileMappingW( access, inherit, NULL );
1625
1626     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1627     {
1628         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1629         return 0;
1630     }
1631     return OpenFileMappingW( access, inherit, buffer );
1632 }
1633
1634
1635 /***********************************************************************
1636  *             OpenFileMappingW   (KERNEL32.@)
1637  * See OpenFileMappingA
1638  */
1639 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1640 {
1641     HANDLE ret;
1642     DWORD len = name ? strlenW(name) : 0;
1643     if (len >= MAX_PATH)
1644     {
1645         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1646         return 0;
1647     }
1648     SERVER_START_REQ( open_mapping )
1649     {
1650         req->access  = access;
1651         req->inherit = inherit;
1652         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1653         wine_server_call_err( req );
1654         ret = reply->handle;
1655     }
1656     SERVER_END_REQ;
1657     return ret;
1658 }
1659
1660
1661 /***********************************************************************
1662  *             MapViewOfFile   (KERNEL32.@)
1663  * Maps a view of a file into the address space
1664  *
1665  * RETURNS
1666  *      Starting address of mapped view
1667  *      NULL: Failure
1668  */
1669 LPVOID WINAPI MapViewOfFile(
1670               HANDLE mapping,  /* [in] File-mapping object to map */
1671               DWORD access,      /* [in] Access mode */
1672               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1673               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1674               DWORD count        /* [in] Number of bytes to map */
1675 ) {
1676     return MapViewOfFileEx( mapping, access, offset_high,
1677                             offset_low, count, NULL );
1678 }
1679
1680
1681 /***********************************************************************
1682  *             MapViewOfFileEx   (KERNEL32.@)
1683  * Maps a view of a file into the address space
1684  *
1685  * RETURNS
1686  *      Starting address of mapped view
1687  *      NULL: Failure
1688  */
1689 LPVOID WINAPI MapViewOfFileEx(
1690               HANDLE handle,   /* [in] File-mapping object to map */
1691               DWORD access,      /* [in] Access mode */
1692               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1693               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1694               DWORD count,       /* [in] Number of bytes to map */
1695               LPVOID addr        /* [in] Suggested starting address for mapped view */
1696 ) {
1697     FILE_VIEW *view;
1698     UINT size = 0;
1699     int flags = MAP_PRIVATE;
1700     int unix_handle = -1;
1701     int prot, res;
1702     void *base, *ptr = (void *)-1, *ret;
1703     DWORD size_low, size_high, header_size, shared_size;
1704     HANDLE shared_file;
1705     BOOL removable;
1706
1707     /* Check parameters */
1708
1709     if ((offset_low & granularity_mask) ||
1710         (addr && ((UINT_PTR)addr & granularity_mask)))
1711     {
1712         SetLastError( ERROR_INVALID_PARAMETER );
1713         return NULL;
1714     }
1715
1716     SERVER_START_REQ( get_mapping_info )
1717     {
1718         req->handle = handle;
1719         res = wine_server_call_err( req );
1720         prot        = reply->protect;
1721         base        = reply->base;
1722         size_low    = reply->size_low;
1723         size_high   = reply->size_high;
1724         header_size = reply->header_size;
1725         shared_file = reply->shared_file;
1726         shared_size = reply->shared_size;
1727         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1728                        reply->drive_type == DRIVE_CDROM);
1729     }
1730     SERVER_END_REQ;
1731     if (res) goto error;
1732
1733     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1734
1735     if (prot & VPROT_IMAGE)
1736         return map_image( handle, unix_handle, base, size_low, header_size,
1737                           shared_file, shared_size, removable );
1738
1739
1740     if (size_high)
1741         ERR("Sizes larger than 4Gb not supported\n");
1742
1743     if ((offset_low >= size_low) ||
1744         (count > size_low - offset_low))
1745     {
1746         SetLastError( ERROR_INVALID_PARAMETER );
1747         goto error;
1748     }
1749     if (count) size = ROUND_SIZE( offset_low, count );
1750     else size = size_low - offset_low;
1751
1752     switch(access)
1753     {
1754     case FILE_MAP_ALL_ACCESS:
1755     case FILE_MAP_WRITE:
1756     case FILE_MAP_WRITE | FILE_MAP_READ:
1757         if (!(prot & VPROT_WRITE))
1758         {
1759             SetLastError( ERROR_INVALID_PARAMETER );
1760             goto error;
1761         }
1762         flags = MAP_SHARED;
1763         /* fall through */
1764     case FILE_MAP_READ:
1765     case FILE_MAP_COPY:
1766     case FILE_MAP_COPY | FILE_MAP_READ:
1767         if (prot & VPROT_READ) break;
1768         /* fall through */
1769     default:
1770         SetLastError( ERROR_INVALID_PARAMETER );
1771         goto error;
1772     }
1773
1774     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1775      * which has a view of this mapping commits some pages, they will
1776      * appear commited in all other processes, which have the same
1777      * view created. Since we don`t support this yet, we create the
1778      * whole mapping commited.
1779      */
1780     prot |= VPROT_COMMITTED;
1781
1782     /* Reserve a properly aligned area */
1783
1784     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1785
1786     /* Map the file */
1787
1788     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1789
1790     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1791                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1792     if (ret != ptr)
1793     {
1794         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1795         goto error;
1796     }
1797     if (removable) handle = 0;  /* don't keep handle open on removable media */
1798
1799     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1800     {
1801         SetLastError( ERROR_OUTOFMEMORY );
1802         goto error;
1803     }
1804     if (unix_handle != -1) close( unix_handle );
1805     return ptr;
1806
1807 error:
1808     if (unix_handle != -1) close( unix_handle );
1809     if (ptr != (void *)-1) munmap( ptr, size );
1810     return NULL;
1811 }
1812
1813
1814 /***********************************************************************
1815  *             FlushViewOfFile   (KERNEL32.@)
1816  * Writes to the disk a byte range within a mapped view of a file
1817  *
1818  * RETURNS
1819  *      TRUE: Success
1820  *      FALSE: Failure
1821  */
1822 BOOL WINAPI FlushViewOfFile(
1823               LPCVOID base, /* [in] Start address of byte range to flush */
1824               DWORD cbFlush /* [in] Number of bytes in range */
1825 ) {
1826     FILE_VIEW *view;
1827     void *addr = ROUND_ADDR( base, page_mask );
1828
1829     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1830                      base, cbFlush );
1831
1832     if (!(view = VIRTUAL_FindView( addr )))
1833     {
1834         SetLastError( ERROR_INVALID_PARAMETER );
1835         return FALSE;
1836     }
1837     if (!cbFlush) cbFlush = view->size;
1838     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1839     SetLastError( ERROR_INVALID_PARAMETER );
1840     return FALSE;
1841 }
1842
1843
1844 /***********************************************************************
1845  *             UnmapViewOfFile   (KERNEL32.@)
1846  * Unmaps a mapped view of a file.
1847  *
1848  * NOTES
1849  *      Should addr be an LPCVOID?
1850  *
1851  * RETURNS
1852  *      TRUE: Success
1853  *      FALSE: Failure
1854  */
1855 BOOL WINAPI UnmapViewOfFile(
1856               LPVOID addr /* [in] Address where mapped view begins */
1857 ) {
1858     FILE_VIEW *view;
1859     void *base = ROUND_ADDR( addr, page_mask );
1860     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1861     {
1862         SetLastError( ERROR_INVALID_PARAMETER );
1863         return FALSE;
1864     }
1865     VIRTUAL_DeleteView( view );
1866     return TRUE;
1867 }