memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <fcntl.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <sys/types.h>
  13 #include <sys/mman.h>
  14 #include "winbase.h"
  15 #include "winerror.h"
  16 #include "file.h"
  17 #include "heap.h"
  18 #include "process.h"
  19 #include "xmalloc.h"
  20 #include "stddebug.h"
  21 #include "debug.h"
  22
  23 /* File mapping */
  24 typedef struct
  25 {
  26     K32OBJ        header;
  27     DWORD         size_high;
  28     DWORD         size_low;
  29     FILE_OBJECT  *file;
  30     BYTE          protect;
  31 } FILE_MAPPING;
  32
  33 /* File view */
  34 typedef struct _FV
  35 {
  36     struct _FV   *next;     /* Next view */
  37     struct _FV   *prev;     /* Prev view */
  38     UINT32        base;     /* Base address */
  39     UINT32        size;     /* Size in bytes */
  40     UINT32        flags;    /* Allocation flags */
  41     FILE_MAPPING *mapping;  /* File mapping */
  42     BYTE          protect;  /* Protection for all pages at allocation time */
  43     BYTE          prot[1];  /* Protection byte for each page */
  44 } FILE_VIEW;
  45
  46 /* Per-page protection byte values */
  47 #define VPROT_READ       0x01
  48 #define VPROT_WRITE      0x02
  49 #define VPROT_EXEC       0x04
  50 #define VPROT_WRITECOPY  0x08
  51 #define VPROT_GUARD      0x10
  52 #define VPROT_NOCACHE    0x20
  53 #define VPROT_COMMITTED  0x40
  54
  55 /* Per-view flags */
  56 #define VFLAG_SYSTEM     0x01
  57
  58 /* Conversion from VPROT_* to Win32 flags */
  59 static const BYTE VIRTUAL_Win32Flags[16] =
  60 {
  61     PAGE_NOACCESS,              /* 0 */
  62     PAGE_READONLY,              /* READ */
  63     PAGE_READWRITE,             /* WRITE */
  64     PAGE_READWRITE,             /* READ | WRITE */
  65     PAGE_EXECUTE,               /* EXEC */
  66     PAGE_EXECUTE_READ,          /* READ | EXEC */
  67     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  68     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  69     PAGE_WRITECOPY,             /* WRITECOPY */
  70     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  71     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  72     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  73     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  74     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  75     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  77 };
  78
  79
  80 static FILE_VIEW *VIRTUAL_FirstView;
  81
  82 static UINT32 page_shift;
  83 static UINT32 page_mask;
  84
  85 #define ROUND_ADDR(addr) \
  86    ((UINT32)(addr) & ~page_mask)
  87
  88 #define ROUND_SIZE(addr,size) \
  89    (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
  90
  91
  92 /***********************************************************************
  93  *           VIRTUAL_DestroyMapping
  94  *
  95  * Destroy a FILE_MAPPING object.
  96  */
  97 void VIRTUAL_DestroyMapping( K32OBJ *ptr )
  98 {
  99     FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
 100     assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
 101
 102     if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
 103     ptr->type = K32OBJ_UNKNOWN;
 104     HeapFree( SystemHeap, 0, mapping );
 105 }
 106
 107
 108 /***********************************************************************
 109  *           VIRTUAL_GetProtStr
 110  */
 111 static const char *VIRTUAL_GetProtStr( BYTE prot )
 112 {
 113     static char buffer[6];
 114     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 115     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 116     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 117     buffer[3] = (prot & VPROT_WRITE) ?
 118                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 119     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 120     buffer[5] = 0;
 121     return buffer;
 122 }
 123
 124
 125 /***********************************************************************
 126  *           VIRTUAL_DumpView
 127  */
 128 static void VIRTUAL_DumpView( FILE_VIEW *view )
 129 {
 130     UINT32 i, count;
 131     UINT32 addr = view->base;
 132     BYTE prot = view->prot[0];
 133
 134     dprintf_virtual( stddeb, "View: %08x - %08x%s\n",
 135                      view->base, view->base + view->size - 1,
 136                      (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 137
 138     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 139     {
 140         if (view->prot[i] == prot) continue;
 141         dprintf_virtual( stddeb, "    %08x - %08x %s\n",
 142                          addr, addr + (count << page_shift) - 1,
 143                          VIRTUAL_GetProtStr(prot) );
 144         addr += (count << page_shift);
 145         prot = view->prot[i];
 146         count = 0;
 147     }
 148     if (count)
 149         dprintf_virtual( stddeb, "    %08x - %08x %s\n",
 150                          addr, addr + (count << page_shift) - 1,
 151                          VIRTUAL_GetProtStr(prot) );
 152 }
 153
 154
 155 /***********************************************************************
 156  *           VIRTUAL_Dump
 157  */
 158 void VIRTUAL_Dump(void)
 159 {
 160     FILE_VIEW *view = VIRTUAL_FirstView;
 161     dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
 162     while (view)
 163     {
 164         VIRTUAL_DumpView( view );
 165         view = view->next;
 166     }
 167 }
 168
 169
 170 /***********************************************************************
 171  *           VIRTUAL_FindView
 172  *
 173  * Find the view containing a given address.
 174  */
 175 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
 176 {
 177     FILE_VIEW *view = VIRTUAL_FirstView;
 178     while (view)
 179     {
 180         if (view->base > addr) return NULL;
 181         if (view->base + view->size > addr) return view;
 182         view = view->next;
 183     }
 184     return NULL;
 185 }
 186
 187
 188 /***********************************************************************
 189  *           VIRTUAL_CreateView
 190  *
 191  * Create a new view and add it in the linked list.
 192  */
 193 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size,
 194                                       UINT32 flags, BYTE vprot )
 195 {
 196     FILE_VIEW *view, *prev;
 197
 198     /* Create the view structure */
 199
 200     size >>= page_shift;
 201     view = (FILE_VIEW *)xmalloc( sizeof(*view) + size - 1 );
 202     view->base    = base;
 203     view->size    = size << page_shift;
 204     view->flags   = flags;
 205     view->protect = vprot;
 206     memset( view->prot, vprot, size );
 207
 208     /* Insert it in the linked list */
 209
 210     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 211     {
 212         view->next = VIRTUAL_FirstView;
 213         view->prev = NULL;
 214         if (view->next) view->next->prev = view;
 215         VIRTUAL_FirstView = view;
 216     }
 217     else
 218     {
 219         prev = VIRTUAL_FirstView;
 220         while (prev->next && (prev->next->base < base)) prev = prev->next;
 221         view->next = prev->next;
 222         view->prev = prev;
 223         if (view->next) view->next->prev = view;
 224         prev->next  = view;
 225     }
 226     if (debugging_virtual) VIRTUAL_DumpView( view );
 227     return view;
 228 }
 229
 230
 231 /***********************************************************************
 232  *           VIRTUAL_DeleteView
 233  *
 234  * Delete an view.
 235  */
 236 static void VIRTUAL_DeleteView( FILE_VIEW *view )
 237 {
 238     munmap( (void *)view->base, view->size );
 239     if (view->next) view->next->prev = view->prev;
 240     if (view->prev) view->prev->next = view->next;
 241     else VIRTUAL_FirstView = view->next;
 242     free( view );
 243 }
 244
 245
 246 /***********************************************************************
 247  *           VIRTUAL_GetUnixProt
 248  *
 249  * Convert page protections to protection for mmap/mprotect.
 250  */
 251 static int VIRTUAL_GetUnixProt( BYTE vprot )
 252 {
 253     int prot = 0;
 254     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 255     {
 256         if (vprot & VPROT_READ) prot |= PROT_READ;
 257         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 258         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 259     }
 260     return prot;
 261 }
 262
 263
 264 /***********************************************************************
 265  *           VIRTUAL_GetWin32Prot
 266  *
 267  * Convert page protections to Win32 flags.
 268  */
 269 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
 270 {
 271     *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 272     if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
 273     if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 274
 275     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 276 }
 277
 278
 279 /***********************************************************************
 280  *           VIRTUAL_GetProt
 281  *
 282  * Build page protections from Win32 flags.
 283  */
 284 static BYTE VIRTUAL_GetProt( DWORD protect )
 285 {
 286     BYTE vprot;
 287
 288     switch(protect & 0xff)
 289     {
 290     case PAGE_READONLY:
 291         vprot = VPROT_READ;
 292         break;
 293     case PAGE_READWRITE:
 294         vprot = VPROT_READ | VPROT_WRITE;
 295         break;
 296     case PAGE_WRITECOPY:
 297         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 298         break;
 299     case PAGE_EXECUTE:
 300         vprot = VPROT_EXEC;
 301         break;
 302     case PAGE_EXECUTE_READ:
 303         vprot = VPROT_EXEC | VPROT_READ;
 304         break;
 305     case PAGE_EXECUTE_READWRITE:
 306         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 307         break;
 308     case PAGE_EXECUTE_WRITECOPY:
 309         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 310         break;
 311     case PAGE_NOACCESS:
 312     default:
 313         vprot = 0;
 314         break;
 315     }
 316     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 317     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 318     return vprot;
 319 }
 320
 321
 322 /***********************************************************************
 323  *           VIRTUAL_SetProt
 324  *
 325  * Change the protection of a range of pages.
 326  */
 327 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
 328                                UINT32 size, BYTE vprot )
 329 {
 330     dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
 331                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 332
 333     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 334         return FALSE;  /* FIXME: last error */
 335
 336     memset( view->prot + ((base - view->base) >> page_shift),
 337             vprot, size >> page_shift );
 338     if (debugging_virtual) VIRTUAL_DumpView( view );
 339     return TRUE;
 340 }
 341
 342
 343 /***********************************************************************
 344  *             VIRTUAL_CheckFlags
 345  *
 346  * Check that all pages in a range have the given flags.
 347  */
 348 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
 349 {
 350     FILE_VIEW *view;
 351     UINT32 page;
 352
 353     if (!size) return TRUE;
 354     if (!(view = VIRTUAL_FindView( base ))) return FALSE;
 355     if (view->base + view->size < base + size) return FALSE;
 356     page = (base - view->base) >> page_shift;
 357     size = ROUND_SIZE( base, size ) >> page_shift;
 358     while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
 359     return TRUE;
 360 }
 361
 362
 363 /***********************************************************************
 364  *           VIRTUAL_Init
 365  */
 366 BOOL32 VIRTUAL_Init(void)
 367 {
 368     SYSTEM_INFO sysinfo;
 369     GetSystemInfo( &sysinfo );
 370
 371     page_mask = sysinfo.dwPageSize - 1;
 372     /* Make sure we have a power of 2 */
 373     assert( !(sysinfo.dwPageSize & page_mask) );
 374     page_shift = 0;
 375     while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
 376
 377 #ifdef linux
 378     {
 379         FILE *f = fopen( "/proc/self/maps", "r" );
 380         if (f)
 381         {
 382             char buffer[80];
 383             while (fgets( buffer, sizeof(buffer), f ))
 384             {
 385                 int start, end, offset;
 386                 char r, w, x, p;
 387                 BYTE vprot = VPROT_COMMITTED;
 388
 389                 sscanf( buffer, "%x-%x %c%c%c%c %x",
 390                         &start, &end, &r, &w, &x, &p, &offset );
 391                 if (r == 'r') vprot |= VPROT_READ;
 392                 if (w == 'w') vprot |= VPROT_WRITE;
 393                 if (x == 'x') vprot |= VPROT_EXEC;
 394                 if (p == 'p') vprot |= VPROT_WRITECOPY;
 395                 VIRTUAL_CreateView( start, end - start, VFLAG_SYSTEM, vprot );
 396             }
 397             fclose( f );
 398         }
 399     }
 400 #endif  /* linux */
 401     return TRUE;
 402 }
 403
 404
 405 /***********************************************************************
 406  *             VirtualAlloc   (KERNEL32.548)
 407  */
 408 LPVOID VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect )
 409 {
 410     FILE_VIEW *view;
 411     UINT32 base, ptr, view_size;
 412     BYTE vprot;
 413
 414     dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
 415                      (UINT32)addr, size, type, protect );
 416
 417     /* Round parameters to a page boundary */
 418
 419     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 420     {
 421         SetLastError( ERROR_OUTOFMEMORY );
 422         return NULL;
 423     }
 424     if (addr)
 425     {
 426         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 427             base = ((UINT32)addr + 0xffff) & ~0xffff;
 428         else
 429             base = ROUND_ADDR( addr );
 430         size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
 431         if (base + size < base)  /* Disallow wrap-around */
 432         {
 433             SetLastError( ERROR_INVALID_PARAMETER );
 434             return NULL;
 435         }
 436     }
 437     else
 438     {
 439         base = 0;
 440         size = (size + page_mask) & ~page_mask;
 441     }
 442
 443     /* Compute the protection flags */
 444
 445     if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
 446         (type & ~(MEM_COMMIT | MEM_RESERVE)))
 447     {
 448         SetLastError( ERROR_INVALID_PARAMETER );
 449         return NULL;
 450     }
 451     if (type & MEM_COMMIT)
 452         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 453     else vprot = 0;
 454
 455     /* Reserve the memory */
 456
 457     if ((type & MEM_RESERVE) || !base)
 458     {
 459         view_size = size + (base ? 0 : 0x10000);
 460         ptr = (UINT32)FILE_mmap( NULL, (LPVOID)base, 0, view_size, 0, 0,
 461                                  VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 462         if (ptr == (UINT32)-1)
 463         {
 464             SetLastError( ERROR_OUTOFMEMORY );
 465             return NULL;
 466         }
 467         if (!base)
 468         {
 469             /* Release the extra memory while keeping the range */
 470             /* starting on a 64k boundary. */
 471
 472             if (ptr & 0xffff0000)
 473             {
 474                 munmap( (void *)ptr, 0x10000 - (ptr & 0xffff) );
 475                 view_size -= (ptr & 0xffff);
 476                 ptr = (ptr + 0x10000) & 0xffff0000;
 477             }
 478             if (view_size > size)
 479                 munmap( (void *)(ptr + size), view_size - size );
 480         }
 481         if (!(view = VIRTUAL_CreateView( ptr, size, 0, vprot )))
 482         {
 483             munmap( (void *)ptr, size );
 484             return NULL;  /* FIXME: last error */
 485         }
 486         if (debugging_virtual) VIRTUAL_DumpView( view );
 487         return (LPVOID)ptr;
 488     }
 489
 490     /* Commit the pages */
 491
 492     if (!(view = VIRTUAL_FindView( base )) ||
 493         (base + size > view->base + view->size))
 494     {
 495         SetLastError( ERROR_INVALID_PARAMETER );
 496         return NULL;
 497     }
 498
 499     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
 500     return (LPVOID)base;
 501 }
 502
 503
 504 /***********************************************************************
 505  *             VirtualFree   (KERNEL32.550)
 506  */
 507 BOOL32 VirtualFree( LPVOID addr, DWORD size, DWORD type )
 508 {
 509     FILE_VIEW *view;
 510     UINT32 base;
 511
 512     dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
 513                      (UINT32)addr, size, type );
 514
 515     /* Fix the parameters */
 516
 517     size = ROUND_SIZE( addr, size );
 518     base = ROUND_ADDR( addr );
 519
 520     if (!(view = VIRTUAL_FindView( base )) ||
 521         (base + size > view->base + view->size))
 522     {
 523         SetLastError( ERROR_INVALID_PARAMETER );
 524         return FALSE;
 525     }
 526
 527     /* Compute the protection flags */
 528
 529     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
 530     {
 531         SetLastError( ERROR_INVALID_PARAMETER );
 532         return FALSE;
 533     }
 534
 535     /* Free the pages */
 536
 537     if (type == MEM_RELEASE)
 538     {
 539         if (size || (base != view->base))
 540         {
 541             SetLastError( ERROR_INVALID_PARAMETER );
 542             return FALSE;
 543         }
 544         VIRTUAL_DeleteView( view );
 545         return TRUE;
 546     }
 547
 548     /* Decommit the pages */
 549
 550     return VIRTUAL_SetProt( view, base, size, 0 );
 551 }
 552
 553
 554 /***********************************************************************
 555  *             VirtualLock   (KERNEL32.551)
 556  */
 557 BOOL32 VirtualLock( LPVOID addr, DWORD size )
 558 {
 559     return TRUE;
 560 }
 561
 562
 563 /***********************************************************************
 564  *             VirtualUnlock   (KERNEL32.556)
 565  */
 566 BOOL32 VirtualUnlock( LPVOID addr, DWORD size )
 567 {
 568     return TRUE;
 569 }
 570
 571
 572 /***********************************************************************
 573  *             VirtualProtect   (KERNEL32.552)
 574  */
 575 BOOL32 VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
 576                        LPDWORD old_prot )
 577 {
 578     FILE_VIEW *view;
 579     UINT32 base, i;
 580     BYTE vprot, *p;
 581
 582     dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
 583                      (UINT32)addr, size, new_prot );
 584
 585     /* Fix the parameters */
 586
 587     size = ROUND_SIZE( addr, size );
 588     base = ROUND_ADDR( addr );
 589
 590     if (!(view = VIRTUAL_FindView( base )) ||
 591         (base + size > view->base + view->size))
 592     {
 593         SetLastError( ERROR_INVALID_PARAMETER );
 594         return FALSE;
 595     }
 596
 597     /* Make sure all the pages are committed */
 598
 599     p = view->prot + ((base - view->base) >> page_shift);
 600     for (i = size >> page_shift; i; i--, p++)
 601     {
 602         if (!(*p & VPROT_COMMITTED))
 603         {
 604             SetLastError( ERROR_INVALID_PARAMETER );
 605             return FALSE;
 606         }
 607     }
 608
 609     VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
 610     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
 611     return VIRTUAL_SetProt( view, base, size, vprot );
 612 }
 613
 614
 615 /***********************************************************************
 616  *             VirtualProtectEx   (KERNEL32.553)
 617  */
 618 BOOL32 VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
 619                          DWORD new_prot, LPDWORD old_prot )
 620 {
 621     BOOL32 ret = FALSE;
 622
 623     PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
 624     if (pdb)
 625     {
 626         if (pdb == pCurrentProcess)
 627             ret = VirtualProtect( addr, size, new_prot, old_prot );
 628         else
 629             fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
 630         K32OBJ_DecCount( &pdb->header );
 631     }
 632     return ret;
 633 }
 634
 635
 636 /***********************************************************************
 637  *             VirtualQuery   (KERNEL32.554)
 638  */
 639 BOOL32 VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info, DWORD len )
 640 {
 641     FILE_VIEW *view = VIRTUAL_FirstView;
 642     UINT32 base = ROUND_ADDR( addr );
 643     UINT32 alloc_base = 0;
 644     UINT32 size = 0;
 645
 646     /* Find the view containing the address */
 647
 648     for (;;)
 649     {
 650         if (!view)
 651         {
 652             size = 0xffff0000 - alloc_base;
 653             break;
 654         }
 655         if (view->base > base)
 656         {
 657             size = view->base - alloc_base;
 658             view = NULL;
 659             break;
 660         }
 661         if (view->base + view->size > base)
 662         {
 663             alloc_base = view->base;
 664             size = view->size;
 665             break;
 666         }
 667         alloc_base = view->base + view->size;
 668         view = view->next;
 669     }
 670
 671     /* Fill the info structure */
 672
 673     if (!view)
 674     {
 675         info->State             = MEM_FREE;
 676         info->Protect           = 0;
 677         info->AllocationProtect = 0;
 678         info->Type              = 0;
 679     }
 680     else
 681     {
 682         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
 683         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
 684         for (size = base - alloc_base; size < view->size; size += page_mask+1)
 685             if (view->prot[size >> page_shift] != vprot) break;
 686         info->AllocationProtect = view->protect;
 687         info->Type              = MEM_PRIVATE;  /* FIXME */
 688     }
 689
 690     info->BaseAddress    = (LPVOID)base;
 691     info->AllocationBase = (LPVOID)alloc_base;
 692     info->RegionSize     = size - (base - alloc_base);
 693     return TRUE;
 694 }
 695
 696
 697 /***********************************************************************
 698  *             VirtualQueryEx   (KERNEL32.555)
 699  */
 700 BOOL32 VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
 701                        LPMEMORY_BASIC_INFORMATION info, DWORD len )
 702 {
 703     BOOL32 ret = FALSE;
 704
 705     PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
 706     if (pdb)
 707     {
 708         if (pdb == pCurrentProcess)
 709             ret = VirtualQuery( addr, info, len );
 710         else
 711             fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
 712         K32OBJ_DecCount( &pdb->header );
 713     }
 714     return ret;
 715 }
 716
 717
 718 /***********************************************************************
 719  *             IsBadReadPtr32   (KERNEL32.354)
 720  */
 721 BOOL32 IsBadReadPtr32( LPCVOID ptr, UINT32 size )
 722 {
 723     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 724                                 VPROT_READ | VPROT_COMMITTED );
 725 }
 726
 727
 728 /***********************************************************************
 729  *             IsBadWritePtr32   (KERNEL32.357)
 730  */
 731 BOOL32 IsBadWritePtr32( LPVOID ptr, UINT32 size )
 732 {
 733     return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
 734                                 VPROT_WRITE | VPROT_COMMITTED );
 735 }
 736
 737
 738 /***********************************************************************
 739  *             IsBadHugeReadPtr32   (KERNEL32.352)
 740  */
 741 BOOL32 IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
 742 {
 743     return IsBadReadPtr32( ptr, size );
 744 }
 745
 746
 747 /***********************************************************************
 748  *             IsBadHugeWritePtr32   (KERNEL32.353)
 749  */
 750 BOOL32 IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
 751 {
 752     return IsBadWritePtr32( ptr, size );
 753 }
 754
 755
 756 /***********************************************************************
 757  *             IsBadCodePtr32   (KERNEL32.351)
 758  */
 759 BOOL32 IsBadCodePtr32( FARPROC32 ptr )
 760 {
 761     return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
 762 }
 763
 764
 765 /***********************************************************************
 766  *             IsBadStringPtr32A   (KERNEL32.355)
 767  */
 768 BOOL32 IsBadStringPtr32A( LPCSTR str, UINT32 max )
 769 {
 770     FILE_VIEW *view;
 771     UINT32 page, count;
 772
 773     if (!max) return FALSE;
 774     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
 775     page  = ((UINT32)str - view->base) >> page_shift;
 776     count = page_mask + 1 - ((UINT32)str & page_mask);
 777
 778     while (max)
 779     {
 780         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
 781                                                 (VPROT_READ | VPROT_COMMITTED))
 782             return TRUE;
 783         if (count > max) count = max;
 784         max -= count;
 785         while (count--) if (!*str++) return FALSE;
 786         if (++page >= view->size >> page_shift) return TRUE;
 787         count = page_mask + 1;
 788     }
 789     return FALSE;
 790 }
 791
 792
 793 /***********************************************************************
 794  *             IsBadStringPtr32W   (KERNEL32.356)
 795  */
 796 BOOL32 IsBadStringPtr32W( LPCWSTR str, UINT32 max )
 797 {
 798     FILE_VIEW *view;
 799     UINT32 page, count;
 800
 801     if (!max) return FALSE;
 802     if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
 803     page  = ((UINT32)str - view->base) >> page_shift;
 804     count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
 805
 806     while (max)
 807     {
 808         if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
 809                                                 (VPROT_READ | VPROT_COMMITTED))
 810             return TRUE;
 811         if (count > max) count = max;
 812         max -= count;
 813         while (count--) if (!*str++) return FALSE;
 814         if (++page >= view->size >> page_shift) return TRUE;
 815         count = (page_mask + 1) / sizeof(WCHAR);
 816     }
 817     return FALSE;
 818 }
 819
 820
 821 /***********************************************************************
 822  *             CreateFileMapping32A   (KERNEL32.46)
 823  */
 824 HANDLE32 CreateFileMapping32A( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
 825                                DWORD protect, DWORD size_high, DWORD size_low,
 826                                LPCSTR name )
 827 {
 828     FILE_MAPPING *mapping = NULL;
 829     HANDLE32 handle;
 830
 831     K32OBJ *obj = K32OBJ_FindName( name );
 832     if (obj)
 833     {
 834         if (obj->type == K32OBJ_MEM_MAPPED_FILE)
 835         {
 836             SetLastError( ERROR_ALREADY_EXISTS );
 837             return PROCESS_AllocHandle( obj, 0 );
 838         }
 839         SetLastError( ERROR_DUP_NAME );
 840         return 0;
 841     }
 842
 843     printf( "CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
 844             hFile, attr, protect, size_high, size_low, name );
 845
 846     if (hFile == INVALID_HANDLE_VALUE32)
 847     {
 848         if (!size_high && !size_low)
 849         {
 850             SetLastError( ERROR_INVALID_PARAMETER );
 851             return 0;
 852         }
 853         obj = NULL;
 854     }
 855     else  /* We have a file */
 856     {
 857         BY_HANDLE_FILE_INFORMATION info;
 858         if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
 859         if (!GetFileInformationByHandle( hFile, &info )) goto error;
 860         if (!size_high && !size_low)
 861         {
 862             size_high = info.nFileSizeHigh;
 863             size_low  = info.nFileSizeLow;
 864         }
 865         else if ((size_high > info.nFileSizeHigh) ||
 866                  ((size_high == info.nFileSizeHigh) &&
 867                   (size_low > info.nFileSizeLow)))
 868         {
 869             /* We have to grow the file */
 870             if (SetFilePointer( hFile, size_low, &size_high,
 871                                 FILE_BEGIN ) == 0xffffffff) goto error;
 872             if (!SetEndOfFile( hFile )) goto error;
 873         }
 874     }
 875
 876     if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
 877     mapping->protect   = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 878     mapping->size_high = size_high;
 879     mapping->size_low  = size_low;
 880     mapping->file      = (FILE_OBJECT *)obj;
 881
 882     handle = PROCESS_AllocHandle( &mapping->header, 0 );
 883     if (handle != INVALID_HANDLE_VALUE32) return handle;
 884
 885 error:
 886     if (obj) K32OBJ_DecCount( obj );
 887     if (mapping) HeapFree( SystemHeap, 0, mapping );
 888     return 0;
 889 }
 890
 891
 892 /***********************************************************************
 893  *             CreateFileMapping32W   (KERNEL32.47)
 894  */
 895 HANDLE32 CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
 896                                DWORD protect, DWORD size_high, DWORD size_low,
 897                                LPCWSTR name )
 898 {
 899     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
 900     HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
 901                                          size_high, size_low, nameA );
 902     HeapFree( GetProcessHeap(), 0, nameA );
 903     return ret;
 904 }
 905
 906
 907 /***********************************************************************
 908  *             OpenFileMapping32A   (KERNEL32.397)
 909  */
 910 HANDLE32 OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
 911 {
 912     K32OBJ *obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE );
 913     if (!obj) return 0;
 914     return PROCESS_AllocHandle( obj, 0 );
 915 }
 916
 917
 918 /***********************************************************************
 919  *             OpenFileMapping32W   (KERNEL32.398)
 920  */
 921 HANDLE32 OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name )
 922 {
 923     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
 924     HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
 925     HeapFree( GetProcessHeap(), 0, nameA );
 926     return ret;
 927 }
 928
 929
 930 /***********************************************************************
 931  *             MapViewOfFile   (KERNEL32.385)
 932  */
 933 LPVOID MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
 934                       DWORD offset_low, DWORD count )
 935 {
 936     return MapViewOfFileEx( mapping, access, offset_high,
 937                             offset_low, count, NULL );
 938 }
 939
 940
 941 /***********************************************************************
 942  *             MapViewOfFileEx   (KERNEL32.386)
 943  */
 944 LPVOID MapViewOfFileEx( HANDLE32 handle, DWORD access, DWORD offset_high,
 945                         DWORD offset_low, DWORD count, LPVOID addr )
 946 {
 947     FILE_MAPPING *mapping;
 948     LPVOID ret;
 949
 950     if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
 951                                                      K32OBJ_MEM_MAPPED_FILE )))
 952         return NULL;
 953
 954     ret = FILE_mmap(mapping->file, addr, mapping->size_high, mapping->size_low,
 955                     offset_high, offset_low, mapping->protect, MAP_PRIVATE );
 956
 957     K32OBJ_DecCount( &mapping->header );
 958     return ret;
 959 }
 960
 961
 962 /***********************************************************************
 963  *             UnmapViewOfFile   (KERNEL32.540)
 964  */
 965 BOOL32 UnmapViewOfFile( LPVOID addr )
 966 {
 967     FILE_VIEW *view;
 968     UINT32 base = ROUND_ADDR( addr );
 969     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
 970     {
 971         SetLastError( ERROR_INVALID_PARAMETER );
 972         return FALSE;
 973     }
 974     VIRTUAL_DeleteView( view );
 975     return TRUE;
 976 }