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     UINT32        offset;   /* Offset from start of mapped file */
  42     FILE_MAPPING *mapping;  /* File mapping */
  43     BYTE          protect;  /* Protection for all pages at allocation time */
  44     BYTE          prot[1];  /* Protection byte for each page */
  45 } FILE_VIEW;
  46
  47 /* Per-page protection byte values */
  48 #define VPROT_READ       0x01
  49 #define VPROT_WRITE      0x02
  50 #define VPROT_EXEC       0x04
  51 #define VPROT_WRITECOPY  0x08
  52 #define VPROT_GUARD      0x10
  53 #define VPROT_NOCACHE    0x20
  54 #define VPROT_COMMITTED  0x40
  55
  56 /* Per-view flags */
  57 #define VFLAG_SYSTEM     0x01
  58
  59 /* Conversion from VPROT_* to Win32 flags */
  60 static const BYTE VIRTUAL_Win32Flags[16] =
  61 {
  62     PAGE_NOACCESS,              /* 0 */
  63     PAGE_READONLY,              /* READ */
  64     PAGE_READWRITE,             /* WRITE */
  65     PAGE_READWRITE,             /* READ | WRITE */
  66     PAGE_EXECUTE,               /* EXEC */
  67     PAGE_EXECUTE_READ,          /* READ | EXEC */
  68     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  69     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  70     PAGE_WRITECOPY,             /* WRITECOPY */
  71     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  72     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  73     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  74     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  75     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  76     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  77     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  78 };
  79
  80
  81 static FILE_VIEW *VIRTUAL_FirstView;
  82
  83 static UINT32 page_shift;
  84 static UINT32 page_mask;
  85 static UINT32 granularity_mask;  /* Allocation granularity (usually 64k) */
  86
  87 #define ROUND_ADDR(addr) \
  88    ((UINT32)(addr) & ~page_mask)
  89
  90 #define ROUND_SIZE(addr,size) \
  91    (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
  92
  93
  94 /***********************************************************************
  95  *           VIRTUAL_GetProtStr
  96  */
  97 static const char *VIRTUAL_GetProtStr( BYTE prot )
  98 {
  99     static char buffer[6];
 100     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 101     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 102     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 103     buffer[3] = (prot & VPROT_WRITE) ?
 104                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 105     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 106     buffer[5] = 0;
 107     return buffer;
 108 }
 109
 110
 111 /***********************************************************************
 112  *           VIRTUAL_DumpView
 113  */
 114 static void VIRTUAL_DumpView( FILE_VIEW *view )
 115 {
 116     UINT32 i, count;
 117     UINT32 addr = view->base;
 118     BYTE prot = view->prot[0];
 119
 120     fprintf( stderr, "View: %08x - %08x%s",
 121              view->base, view->base + view->size - 1,
 122              (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
 123     if (view->mapping && view->mapping->file)
 124         fprintf( stderr, " %s @ %08x\n",
 125                  view->mapping->file->unix_name, view->offset );
 126     else
 127         fprintf( stderr, " (anonymous)\n");
 128
 129     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 130     {
 131         if (view->prot[i] == prot) continue;
 132         fprintf( stderr, "      %08x - %08x %s\n",
 133                  addr, addr + (count << page_shift) - 1,
 134                  VIRTUAL_GetProtStr(prot) );
 135         addr += (count << page_shift);
 136         prot = view->prot[i];
 137         count = 0;
 138     }
 139     if (count)
 140         fprintf( stderr, "      %08x - %08x %s\n",
 141                  addr, addr + (count << page_shift) - 1,
 142                  VIRTUAL_GetProtStr(prot) );
 143 }
 144
 145
 146 /***********************************************************************
 147  *           VIRTUAL_Dump
 148  */
 149 void VIRTUAL_Dump(void)
 150 {
 151     FILE_VIEW *view = VIRTUAL_FirstView;
 152     fprintf( stderr, "\nDump of all virtual memory views:\n\n" );
 153     while (view)
 154     {
 155         VIRTUAL_DumpView( view );
 156         view = view->next;
 157     }
 158 }
 159
 160
 161 /***********************************************************************
 162  *           VIRTUAL_FindView
 163  *
 164  * Find the view containing a given address.
 165  */
 166 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
 167 {
 168     FILE_VIEW *view = VIRTUAL_FirstView;
 169     while (view)
 170     {
 171         if (view->base > addr) return NULL;
 172         if (view->base + view->size > addr) return view;
 173         view = view->next;
 174     }
 175     return NULL;
 176 }
 177
 178
 179 /***********************************************************************
 180  *           VIRTUAL_CreateView
 181  *
 182  * Create a new view and add it in the linked list.
 183  */
 184 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
 185                                       UINT32 flags, BYTE vprot,
 186                                       FILE_MAPPING *mapping )
 187 {
 188     FILE_VIEW *view, *prev;
 189
 190     /* Create the view structure */
 191
 192     size >>= page_shift;
 193     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 194     view->base    = base;
 195     view->size    = size << page_shift;
 196     view->flags   = flags;
 197     view->offset  = offset;
 198     view->mapping = mapping;
 199     view->protect = vprot;
 200     memset( view->prot, vprot, size );
 201
 202     /* Insert it in the linked list */
 203
 204     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 205     {
 206         view->next = VIRTUAL_FirstView;
 207         view->prev = NULL;
 208         if (view->next) view->next->prev = view;
 209         VIRTUAL_FirstView = view;
 210     }
 211     else
 212     {
 213         prev = VIRTUAL_FirstView;
 214         while (prev->next && (prev->next->base < base)) prev = prev->next;
 215         view->next = prev->next;
 216         view->prev = prev;
 217         if (view->next) view->next->prev = view;
 218         prev->next  = view;
 219     }
 220     if (debugging_virtual) VIRTUAL_DumpView( view );
 221     return view;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           VIRTUAL_DeleteView
 227  *
 228  * Delete an view.
 229  */
 230 static void VIRTUAL_DeleteView( FILE_VIEW *view )
 231 {
 232     munmap( (void *)view->base, view->size );
 233     if (view->next) view->next->prev = view->prev;
 234     if (view->prev) view->prev->next = view->next;
 235     else VIRTUAL_FirstView = view->next;
 236     if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
 237     free( view );
 238 }
 239
 240
 241 /***********************************************************************
 242  *           VIRTUAL_GetUnixProt
 243  *
 244  * Convert page protections to protection for mmap/mprotect.
 245  */
 246 static int VIRTUAL_GetUnixProt( BYTE vprot )
 247 {
 248     int prot = 0;
 249     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 250     {
 251         if (vprot & VPROT_READ) prot |= PROT_READ;
 252         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 253         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 254     }
 255     return prot;
 256 }
 257
 258
 259 /***********************************************************************
 260  *           VIRTUAL_GetWin32Prot
 261  *
 262  * Convert page protections to Win32 flags.
 263  */
 264 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
 265 {
 266     *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 267     if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
 268     if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 269
 270     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 271 }
 272
 273
 274 /***********************************************************************
 275  *           VIRTUAL_GetProt
 276  *
 277  * Build page protections from Win32 flags.
 278  */
 279 static BYTE VIRTUAL_GetProt( DWORD protect )
 280 {
 281     BYTE vprot;
 282
 283     switch(protect & 0xff)
 284     {
 285     case PAGE_READONLY:
 286         vprot = VPROT_READ;
 287         break;
 288     case PAGE_READWRITE:
 289         vprot = VPROT_READ | VPROT_WRITE;
 290         break;
 291     case PAGE_WRITECOPY:
 292         vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 293         break;
 294     case PAGE_EXECUTE:
 295         vprot = VPROT_EXEC;
 296         break;
 297     case PAGE_EXECUTE_READ:
 298         vprot = VPROT_EXEC | VPROT_READ;
 299         break;
 300     case PAGE_EXECUTE_READWRITE:
 301         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
 302         break;
 303     case PAGE_EXECUTE_WRITECOPY:
 304         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 305         break;
 306     case PAGE_NOACCESS:
 307     default:
 308         vprot = 0;
 309         break;
 310     }
 311     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 312     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 313     return vprot;
 314 }
 315
 316
 317 /***********************************************************************
 318  *           VIRTUAL_SetProt
 319  *
 320  * Change the protection of a range of pages.
 321  */
 322 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
 323                                UINT32 size, BYTE vprot )
 324 {
 325     dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
 326                      base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 327
 328     if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
 329         return FALSE;  /* FIXME: last error */
 330
 331     memset( view->prot + ((base - view->base) >> page_shift),
 332             vprot, size >> page_shift );
 333     if (debugging_virtual) VIRTUAL_DumpView( view );
 334     return TRUE;
 335 }
 336
 337
 338 /***********************************************************************
 339  *             VIRTUAL_CheckFlags
 340  *
 341  * Check that all pages in a range have the given flags.
 342  */
 343 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
 344 {
 345     FILE_VIEW *view;
 346     UINT32 page;
 347
 348     if (!size) return TRUE;
 349     if (!(view = VIRTUAL_FindView( base ))) return FALSE;
 350     if (view->base + view->size < base + size) return FALSE;
 351     page = (base - view->base) >> page_shift;
 352     size = ROUND_SIZE( base, size ) >> page_shift;
 353     while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
 354     return TRUE;
 355 }
 356
 357
 358 /***********************************************************************
 359  *           VIRTUAL_Init
 360  */
 361 BOOL32 VIRTUAL_Init(void)
 362 {
 363     SYSTEM_INFO sysinfo;
 364     GetSystemInfo( &sysinfo );
 365
 366     page_mask = sysinfo.dwPageSize - 1;
 367     granularity_mask = sysinfo.dwAllocationGranularity - 1;
 368     /* Make sure we have a power of 2 */
 369     assert( !(sysinfo.dwPageSize & page_mask) );
 370     assert( !(sysinfo.dwAllocationGranularity & granularity_mask) );
 371     page_shift = 0;
 372     while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
 373
 374 #ifdef linux
 375     {
 376         FILE *f = fopen( "/proc/self/maps", "r" );
 377         if (f)
 378         {
 379             char buffer[80];
 380             while (fgets( buffer, sizeof(buffer), f ))
 381             {
 382                 int start, end, offset;
 383                 char r, w, x, p;
 384                 BYTE vprot = VPROT_COMMITTED;
 385
 386                 sscanf( buffer, "%x-%x %c%c%c%c %x",
 387                         &start, &end, &r, &w, &x, &p, &offset );
 388                 if (r == 'r') vprot |= VPROT_READ;
 389                 if (w == 'w') vprot |= VPROT_WRITE;
 390                 if (x == 'x') vprot |= VPROT_EXEC;
 391                 if (p == 'p') vprot |= VPROT_WRITECOPY;
 392                 VIRTUAL_CreateView( start, end - start, 0,
 393                                     VFLAG_SYSTEM, vprot, NULL );
 394             }
 395             fclose( f );
 396         }
 397     }
 398 #endif  /* linux */
 399     return TRUE;
 400 }
 401
 402
 403 /***********************************************************************
 404  *             VirtualAlloc   (KERNEL32.548)
 405  */
 406 LPVOID VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect )
 407 {
 408     FILE_VIEW *view;
 409     UINT32 base, ptr, view_size;
 410     BYTE vprot;
 411
 412     dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
 413                      (UINT32)addr, size, type, protect );
 414
 415     /* Round parameters to a page boundary */
 416
 417     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 418     {
 419         SetLastError( ERROR_OUTOFMEMORY );
 420         return NULL;
 421     }
 422     if (addr)
 423     {
 424         if (type & MEM_RESERVE) /* Round down to 64k boundary */
 425             base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
 426         else
 427             base = ROUND_ADDR( addr );
 428         size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
 429         if (base + size < base)  /* Disallow wrap-around */
 430         {
 431             SetLastError( ERROR_INVALID_PARAMETER );
 432             return NULL;
 433         }
 434     }
 435     else
 436     {
 437         base = 0;
 438         size = (size + page_mask) & ~page_mask;
 439     }
 440
 441     /* Compute the protection flags */
 442
 443     if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
 444         (type & ~(MEM_COMMIT | MEM_RESERVE)))
 445     {
 446         SetLastError( ERROR_INVALID_PARAMETER );
 447         return NULL;
 448     }
 449     if (type & MEM_COMMIT)
 450         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
 451     else vprot = 0;
 452
 453     /* Reserve the memory */
 454
 455     if ((type & MEM_RESERVE) || !base)
 456     {
 457         view_size = size + (base ? 0 : granularity_mask + 1);
 458         ptr = (UINT32)FILE_mmap( NULL, (LPVOID)base, 0, view_size, 0, 0,
 459                                  VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
 460         if (ptr == (UINT32)-1)
 461         {
 462             SetLastError( ERROR_OUTOFMEMORY );
 463             return NULL;
 464         }
 465         if (!base)
 466         {
 467             /* Release the extra memory while keeping the range */
 468             /* starting on a 64k boundary. */
 469
 470             if (ptr & granularity_mask)
 471             {
 472                 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
 473                 munmap( (void *)ptr, extra );
 474                 ptr += extra;
 475                 view_size -= extra;
 476             }
 477             if (view_size > size)
 478                 munmap( (void *)(ptr + size), view_size - size );
 479         }
 480         if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
 481         {
 482             munmap( (void *)ptr, size );
 483             SetLastError( ERROR_OUTOFMEMORY );
 484             return NULL;
 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     BYTE vprot;
 831
 832     /* First search for an object with the same name */
 833
 834     K32OBJ *obj = K32OBJ_FindName( name );
 835     if (obj)
 836     {
 837         if (obj->type == K32OBJ_MEM_MAPPED_FILE)
 838         {
 839             SetLastError( ERROR_ALREADY_EXISTS );
 840             return PROCESS_AllocHandle( obj, 0 );
 841         }
 842         SetLastError( ERROR_DUP_NAME );
 843         return 0;
 844     }
 845
 846     /* Check parameters */
 847
 848     dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
 849                     hFile, attr, protect, size_high, size_low, name );
 850
 851     vprot = VIRTUAL_GetProt( protect );
 852     if (protect & SEC_RESERVE)
 853     {
 854         if (hFile != INVALID_HANDLE_VALUE32)
 855         {
 856             SetLastError( ERROR_INVALID_PARAMETER );
 857             return 0;
 858         }
 859     }
 860     else vprot |= VPROT_COMMITTED;
 861     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
 862
 863     /* Compute the size and extend the file if necessary */
 864
 865     if (hFile == INVALID_HANDLE_VALUE32)
 866     {
 867         if (!size_high && !size_low)
 868         {
 869             SetLastError( ERROR_INVALID_PARAMETER );
 870             return 0;
 871         }
 872         obj = NULL;
 873     }
 874     else  /* We have a file */
 875     {
 876         BY_HANDLE_FILE_INFORMATION info;
 877         if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
 878         /* FIXME: should check if the file permissions agree
 879          *        with the required protection flags */
 880         if (!GetFileInformationByHandle( hFile, &info )) goto error;
 881         if (!size_high && !size_low)
 882         {
 883             size_high = info.nFileSizeHigh;
 884             size_low  = info.nFileSizeLow;
 885         }
 886         else if ((size_high > info.nFileSizeHigh) ||
 887                  ((size_high == info.nFileSizeHigh) &&
 888                   (size_low > info.nFileSizeLow)))
 889         {
 890             /* We have to grow the file */
 891             if (SetFilePointer( hFile, size_low, &size_high,
 892                                 FILE_BEGIN ) == 0xffffffff) goto error;
 893             if (!SetEndOfFile( hFile )) goto error;
 894         }
 895     }
 896
 897     /* Allocate the mapping object */
 898
 899     if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
 900     mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
 901     mapping->header.refcount = 1;
 902     mapping->protect   = vprot;
 903     mapping->size_high = size_high;
 904     mapping->size_low  = ROUND_SIZE( 0, size_low );
 905     mapping->file      = (FILE_OBJECT *)obj;
 906
 907     handle = PROCESS_AllocHandle( &mapping->header, 0 );
 908     if (handle != INVALID_HANDLE_VALUE32) return handle;
 909
 910 error:
 911     if (obj) K32OBJ_DecCount( obj );
 912     if (mapping) HeapFree( SystemHeap, 0, mapping );
 913     return 0;
 914 }
 915
 916
 917 /***********************************************************************
 918  *             CreateFileMapping32W   (KERNEL32.47)
 919  */
 920 HANDLE32 CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
 921                                DWORD protect, DWORD size_high, DWORD size_low,
 922                                LPCWSTR name )
 923 {
 924     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
 925     HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
 926                                          size_high, size_low, nameA );
 927     HeapFree( GetProcessHeap(), 0, nameA );
 928     return ret;
 929 }
 930
 931
 932 /***********************************************************************
 933  *             OpenFileMapping32A   (KERNEL32.397)
 934  */
 935 HANDLE32 OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
 936 {
 937     K32OBJ *obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE );
 938     if (!obj) return 0;
 939     return PROCESS_AllocHandle( obj, 0 );
 940 }
 941
 942
 943 /***********************************************************************
 944  *             OpenFileMapping32W   (KERNEL32.398)
 945  */
 946 HANDLE32 OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name )
 947 {
 948     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
 949     HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
 950     HeapFree( GetProcessHeap(), 0, nameA );
 951     return ret;
 952 }
 953
 954
 955 /***********************************************************************
 956  *           VIRTUAL_DestroyMapping
 957  *
 958  * Destroy a FILE_MAPPING object.
 959  */
 960 void VIRTUAL_DestroyMapping( K32OBJ *ptr )
 961 {
 962     FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
 963     assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
 964
 965     if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
 966     ptr->type = K32OBJ_UNKNOWN;
 967     HeapFree( SystemHeap, 0, mapping );
 968 }
 969
 970
 971 /***********************************************************************
 972  *             MapViewOfFile   (KERNEL32.385)
 973  */
 974 LPVOID MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
 975                       DWORD offset_low, DWORD count )
 976 {
 977     return MapViewOfFileEx( mapping, access, offset_high,
 978                             offset_low, count, NULL );
 979 }
 980
 981
 982 /***********************************************************************
 983  *             MapViewOfFileEx   (KERNEL32.386)
 984  */
 985 LPVOID MapViewOfFileEx( HANDLE32 handle, DWORD access, DWORD offset_high,
 986                         DWORD offset_low, DWORD count, LPVOID addr )
 987 {
 988     FILE_MAPPING *mapping;
 989     FILE_VIEW *view;
 990     UINT32 ptr = (UINT32)-1, size = 0;
 991     int flags = MAP_PRIVATE;
 992
 993     /* Check parameters */
 994
 995     if ((offset_low & granularity_mask) ||
 996         (addr && ((UINT32)addr & granularity_mask)))
 997     {
 998         SetLastError( ERROR_INVALID_PARAMETER );
 999         return NULL;
1000     }
1001
1002     if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
1003                                                      K32OBJ_MEM_MAPPED_FILE )))
1004         return NULL;
1005
1006     if (mapping->size_high || offset_high)
1007         fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1008
1009     if ((offset_low >= mapping->size_low) ||
1010         (count > mapping->size_low - offset_low))
1011     {
1012         SetLastError( ERROR_INVALID_PARAMETER );
1013         goto error;
1014     }
1015     if (count) size = ROUND_SIZE( offset_low, count );
1016     else size = mapping->size_low - offset_low;
1017
1018     switch(access)
1019     {
1020     case FILE_MAP_ALL_ACCESS:
1021     case FILE_MAP_WRITE:
1022     case FILE_MAP_WRITE | FILE_MAP_READ:
1023         if (!(mapping->protect & VPROT_WRITE))
1024         {
1025             SetLastError( ERROR_INVALID_PARAMETER );
1026             goto error;
1027         }
1028         flags = MAP_SHARED;
1029         /* fall through */
1030     case FILE_MAP_READ:
1031     case FILE_MAP_COPY:
1032     case FILE_MAP_COPY | FILE_MAP_READ:
1033         if (mapping->protect & VPROT_READ) break;
1034         /* fall through */
1035     default:
1036         SetLastError( ERROR_INVALID_PARAMETER );
1037         goto error;
1038     }
1039
1040     /* Map the file */
1041
1042     dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1043                      handle, size, offset_low );
1044
1045     ptr = (UINT32)FILE_mmap( mapping->file, addr, 0, size, 0, offset_low,
1046                              VIRTUAL_GetUnixProt( mapping->protect ),
1047                              flags );
1048     if (ptr == (UINT32)-1)
1049     {
1050         SetLastError( ERROR_OUTOFMEMORY );
1051         goto error;
1052     }
1053
1054     if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1055                                      mapping->protect, mapping )))
1056     {
1057         SetLastError( ERROR_OUTOFMEMORY );
1058         goto error;
1059     }
1060     return (LPVOID)ptr;
1061
1062 error:
1063     if (ptr != (UINT32)-1) munmap( (void *)ptr, size );
1064     K32OBJ_DecCount( &mapping->header );
1065     return NULL;
1066 }
1067
1068
1069 /***********************************************************************
1070  *             UnmapViewOfFile   (KERNEL32.540)
1071  */
1072 BOOL32 UnmapViewOfFile( LPVOID addr )
1073 {
1074     FILE_VIEW *view;
1075     UINT32 base = ROUND_ADDR( addr );
1076     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1077     {
1078         SetLastError( ERROR_INVALID_PARAMETER );
1079         return FALSE;
1080     }
1081     VIRTUAL_DeleteView( view );
1082     return TRUE;
1083 }