memory/virtual.c

   1 /*
   2  * Win32 virtual memory functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <errno.h>
  26 #ifdef HAVE_SYS_ERRNO_H
  27 #include <sys/errno.h>
  28 #endif
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <sys/types.h>
  35 #ifdef HAVE_SYS_MMAN_H
  36 #include <sys/mman.h>
  37 #endif
  38 #include "winnls.h"
  39 #include "winbase.h"
  40 #include "wine/exception.h"
  41 #include "wine/unicode.h"
  42 #include "wine/library.h"
  43 #include "winerror.h"
  44 #include "file.h"
  45 #include "global.h"
  46 #include "wine/server.h"
  47 #include "msvcrt/excpt.h"
  48 #include "wine/debug.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
  51 WINE_DECLARE_DEBUG_CHANNEL(module);
  52
  53 #ifndef MS_SYNC
  54 #define MS_SYNC 0
  55 #endif
  56
  57 /* File view */
  58 typedef struct _FV
  59 {
  60     struct _FV   *next;        /* Next view */
  61     struct _FV   *prev;        /* Prev view */
  62     void         *base;        /* Base address */
  63     UINT          size;        /* Size in bytes */
  64     UINT          flags;       /* Allocation flags */
  65     HANDLE        mapping;     /* Handle to the file mapping */
  66     HANDLERPROC   handlerProc; /* Fault handler */
  67     LPVOID        handlerArg;  /* Fault handler argument */
  68     BYTE          protect;     /* Protection for all pages at allocation time */
  69     BYTE          prot[1];     /* Protection byte for each page */
  70 } FILE_VIEW;
  71
  72 /* Per-view flags */
  73 #define VFLAG_SYSTEM     0x01
  74 #define VFLAG_VALLOC     0x02  /* allocated by VirtualAlloc */
  75
  76 /* Conversion from VPROT_* to Win32 flags */
  77 static const BYTE VIRTUAL_Win32Flags[16] =
  78 {
  79     PAGE_NOACCESS,              /* 0 */
  80     PAGE_READONLY,              /* READ */
  81     PAGE_READWRITE,             /* WRITE */
  82     PAGE_READWRITE,             /* READ | WRITE */
  83     PAGE_EXECUTE,               /* EXEC */
  84     PAGE_EXECUTE_READ,          /* READ | EXEC */
  85     PAGE_EXECUTE_READWRITE,     /* WRITE | EXEC */
  86     PAGE_EXECUTE_READWRITE,     /* READ | WRITE | EXEC */
  87     PAGE_WRITECOPY,             /* WRITECOPY */
  88     PAGE_WRITECOPY,             /* READ | WRITECOPY */
  89     PAGE_WRITECOPY,             /* WRITE | WRITECOPY */
  90     PAGE_WRITECOPY,             /* READ | WRITE | WRITECOPY */
  91     PAGE_EXECUTE_WRITECOPY,     /* EXEC | WRITECOPY */
  92     PAGE_EXECUTE_WRITECOPY,     /* READ | EXEC | WRITECOPY */
  93     PAGE_EXECUTE_WRITECOPY,     /* WRITE | EXEC | WRITECOPY */
  94     PAGE_EXECUTE_WRITECOPY      /* READ | WRITE | EXEC | WRITECOPY */
  95 };
  96
  97
  98 static FILE_VIEW *VIRTUAL_FirstView;
  99 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
 100
 101 #ifdef __i386__
 102 /* These are always the same on an i386, and it will be faster this way */
 103 # define page_mask  0xfff
 104 # define page_shift 12
 105 # define page_size  0x1000
 106 #else
 107 static UINT page_shift;
 108 static UINT page_mask;
 109 static UINT page_size;
 110 #endif  /* __i386__ */
 111 #define granularity_mask 0xffff  /* Allocation granularity (usually 64k) */
 112
 113 #define ADDRESS_SPACE_LIMIT  ((void *)0xc0000000)  /* top of the user address space */
 114
 115 #define ROUND_ADDR(addr,mask) \
 116    ((void *)((UINT_PTR)(addr) & ~(mask)))
 117
 118 #define ROUND_SIZE(addr,size) \
 119    (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
 120
 121 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
 122    if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
 123
 124 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
 125                             DWORD offset_high, int prot, int flags, BOOL *removable );
 126
 127 /* filter for page-fault exceptions */
 128 static WINE_EXCEPTION_FILTER(page_fault)
 129 {
 130     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
 131         return EXCEPTION_EXECUTE_HANDLER;
 132     return EXCEPTION_CONTINUE_SEARCH;
 133 }
 134
 135 /***********************************************************************
 136  *           VIRTUAL_GetProtStr
 137  */
 138 static const char *VIRTUAL_GetProtStr( BYTE prot )
 139 {
 140     static char buffer[6];
 141     buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
 142     buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
 143     buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
 144     buffer[3] = (prot & VPROT_WRITE) ?
 145                     ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
 146     buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
 147     buffer[5] = 0;
 148     return buffer;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           VIRTUAL_DumpView
 154  */
 155 static void VIRTUAL_DumpView( FILE_VIEW *view )
 156 {
 157     UINT i, count;
 158     char *addr = view->base;
 159     BYTE prot = view->prot[0];
 160
 161     DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
 162     if (view->flags & VFLAG_SYSTEM)
 163         DPRINTF( " (system)\n" );
 164     else if (view->flags & VFLAG_VALLOC)
 165         DPRINTF( " (valloc)\n" );
 166     else if (view->mapping)
 167         DPRINTF( " %d\n", view->mapping );
 168     else
 169         DPRINTF( " (anonymous)\n");
 170
 171     for (count = i = 1; i < view->size >> page_shift; i++, count++)
 172     {
 173         if (view->prot[i] == prot) continue;
 174         DPRINTF( "      %p - %p %s\n",
 175                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 176         addr += (count << page_shift);
 177         prot = view->prot[i];
 178         count = 0;
 179     }
 180     if (count)
 181         DPRINTF( "      %p - %p %s\n",
 182                  addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
 183 }
 184
 185
 186 /***********************************************************************
 187  *           VIRTUAL_Dump
 188  */
 189 void VIRTUAL_Dump(void)
 190 {
 191     FILE_VIEW *view;
 192     DPRINTF( "\nDump of all virtual memory views:\n\n" );
 193     EnterCriticalSection(&csVirtual);
 194     view = VIRTUAL_FirstView;
 195     while (view)
 196     {
 197         VIRTUAL_DumpView( view );
 198         view = view->next;
 199     }
 200     LeaveCriticalSection(&csVirtual);
 201 }
 202
 203
 204 /***********************************************************************
 205  *           VIRTUAL_FindView
 206  *
 207  * Find the view containing a given address.
 208  *
 209  * RETURNS
 210  *      View: Success
 211  *      NULL: Failure
 212  */
 213 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
 214 {
 215     FILE_VIEW *view;
 216
 217     EnterCriticalSection(&csVirtual);
 218     view = VIRTUAL_FirstView;
 219     while (view)
 220     {
 221         if (view->base > addr)
 222         {
 223             view = NULL;
 224             break;
 225         }
 226         if ((char*)view->base + view->size > (char*)addr) break;
 227         view = view->next;
 228     }
 229     LeaveCriticalSection(&csVirtual);
 230     return view;
 231 }
 232
 233
 234 /***********************************************************************
 235  *           VIRTUAL_CreateView
 236  *
 237  * Create a new view and add it in the linked list.
 238  */
 239 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
 240                                       BYTE vprot, HANDLE mapping )
 241 {
 242     FILE_VIEW *view, *prev;
 243
 244     /* Create the view structure */
 245
 246     assert( !((unsigned int)base & page_mask) );
 247     assert( !(size & page_mask) );
 248     size >>= page_shift;
 249     if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
 250     view->base    = base;
 251     view->size    = size << page_shift;
 252     view->flags   = flags;
 253     view->mapping = mapping;
 254     view->protect = vprot;
 255     view->handlerProc = NULL;
 256     memset( view->prot, vprot, size );
 257
 258     /* Duplicate the mapping handle */
 259
 260     if (view->mapping &&
 261         !DuplicateHandle( GetCurrentProcess(), view->mapping,
 262                           GetCurrentProcess(), &view->mapping,
 263                           0, FALSE, DUPLICATE_SAME_ACCESS ))
 264     {
 265         free( view );
 266         return NULL;
 267     }
 268
 269     /* Insert it in the linked list */
 270
 271     EnterCriticalSection(&csVirtual);
 272     if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
 273     {
 274         view->next = VIRTUAL_FirstView;
 275         view->prev = NULL;
 276         if (view->next) view->next->prev = view;
 277         VIRTUAL_FirstView = view;
 278     }
 279     else
 280     {
 281         prev = VIRTUAL_FirstView;
 282         while (prev->next && (prev->next->base < base)) prev = prev->next;
 283         view->next = prev->next;
 284         view->prev = prev;
 285         if (view->next) view->next->prev = view;
 286         prev->next  = view;
 287     }
 288     LeaveCriticalSection(&csVirtual);
 289     VIRTUAL_DEBUG_DUMP_VIEW( view );
 290     return view;
 291 }
 292
 293
 294 /***********************************************************************
 295  *           VIRTUAL_DeleteView
 296  * Deletes a view.
 297  *
 298  * RETURNS
 299  *      None
 300  */
 301 static void VIRTUAL_DeleteView(
 302             FILE_VIEW *view /* [in] View */
 303 ) {
 304     if (!(view->flags & VFLAG_SYSTEM))
 305         munmap( (void *)view->base, view->size );
 306     EnterCriticalSection(&csVirtual);
 307     if (view->next) view->next->prev = view->prev;
 308     if (view->prev) view->prev->next = view->next;
 309     else VIRTUAL_FirstView = view->next;
 310     LeaveCriticalSection(&csVirtual);
 311     if (view->mapping) NtClose( view->mapping );
 312     free( view );
 313 }
 314
 315
 316 /***********************************************************************
 317  *           VIRTUAL_GetUnixProt
 318  *
 319  * Convert page protections to protection for mmap/mprotect.
 320  */
 321 static int VIRTUAL_GetUnixProt( BYTE vprot )
 322 {
 323     int prot = 0;
 324     if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
 325     {
 326         if (vprot & VPROT_READ) prot |= PROT_READ;
 327         if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
 328         if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
 329         if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
 330     }
 331     return prot;
 332 }
 333
 334
 335 /***********************************************************************
 336  *           VIRTUAL_GetWin32Prot
 337  *
 338  * Convert page protections to Win32 flags.
 339  *
 340  * RETURNS
 341  *      None
 342  */
 343 static void VIRTUAL_GetWin32Prot(
 344             BYTE vprot,     /* [in] Page protection flags */
 345             DWORD *protect, /* [out] Location to store Win32 protection flags */
 346             DWORD *state    /* [out] Location to store mem state flag */
 347 ) {
 348     if (protect) {
 349         *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
 350 /*      if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
 351         if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
 352
 353         if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
 354     }
 355
 356     if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
 357 }
 358
 359
 360 /***********************************************************************
 361  *           VIRTUAL_GetProt
 362  *
 363  * Build page protections from Win32 flags.
 364  *
 365  * RETURNS
 366  *      Value of page protection flags
 367  */
 368 static BYTE VIRTUAL_GetProt(
 369             DWORD protect  /* [in] Win32 protection flags */
 370 ) {
 371     BYTE vprot;
 372
 373     switch(protect & 0xff)
 374     {
 375     case PAGE_READONLY:
 376         vprot = VPROT_READ;
 377         break;
 378     case PAGE_READWRITE:
 379         vprot = VPROT_READ | VPROT_WRITE;
 380         break;
 381     case PAGE_WRITECOPY:
 382         /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
 383          * that the hFile must have been opened with GENERIC_READ and
 384          * GENERIC_WRITE access.  This is WRONG as tests show that you
 385          * only need GENERIC_READ access (at least for Win9x,
 386          * FIXME: what about NT?).  Thus, we don't put VPROT_WRITE in
 387          * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
 388          */
 389         vprot = VPROT_READ | VPROT_WRITECOPY;
 390         break;
 391     case PAGE_EXECUTE:
 392         vprot = VPROT_EXEC;
 393         break;
 394     case PAGE_EXECUTE_READ:
 395         vprot = VPROT_EXEC | VPROT_READ;
 396         break;
 397     case PAGE_EXECUTE_READWRITE:
 398         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
 399         break;
 400     case PAGE_EXECUTE_WRITECOPY:
 401         /* See comment for PAGE_WRITECOPY above */
 402         vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
 403         break;
 404     case PAGE_NOACCESS:
 405     default:
 406         vprot = 0;
 407         break;
 408     }
 409     if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
 410     if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
 411     return vprot;
 412 }
 413
 414
 415 /***********************************************************************
 416  *           VIRTUAL_SetProt
 417  *
 418  * Change the protection of a range of pages.
 419  *
 420  * RETURNS
 421  *      TRUE: Success
 422  *      FALSE: Failure
 423  */
 424 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
 425                              void *base,      /* [in] Starting address */
 426                              UINT size,       /* [in] Size in bytes */
 427                              BYTE vprot )     /* [in] Protections to use */
 428 {
 429     TRACE("%p-%p %s\n",
 430           base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
 431
 432     if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
 433         return FALSE;  /* FIXME: last error */
 434
 435     memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
 436             vprot, size >> page_shift );
 437     VIRTUAL_DEBUG_DUMP_VIEW( view );
 438     return TRUE;
 439 }
 440
 441
 442 /***********************************************************************
 443  *           anon_mmap_aligned
 444  *
 445  * Create an anonymous mapping aligned to the allocation granularity.
 446  */
 447 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
 448 {
 449     void *ptr;
 450     unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
 451
 452     if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
 453     {
 454         /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
 455          * Platform Differences":
 456          * Windows NT: ERROR_INVALID_PARAMETER
 457          * Windows 95: ERROR_INVALID_ADDRESS.
 458          */
 459         if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
 460         else
 461         {
 462             if (GetVersion() & 0x80000000)  /* win95 */
 463                 SetLastError( ERROR_INVALID_ADDRESS );
 464             else
 465                 SetLastError( ERROR_INVALID_PARAMETER );
 466         }
 467         return ptr;
 468     }
 469
 470     if (!base)
 471     {
 472         /* Release the extra memory while keeping the range
 473          * starting on the granularity boundary. */
 474         if ((unsigned int)ptr & granularity_mask)
 475         {
 476             unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
 477             munmap( ptr, extra );
 478             ptr = (char *)ptr + extra;
 479             view_size -= extra;
 480         }
 481         if (view_size > size)
 482             munmap( (char *)ptr + size, view_size - size );
 483     }
 484     else if (ptr != base)
 485     {
 486         /* We couldn't get the address we wanted */
 487         munmap( ptr, view_size );
 488         SetLastError( ERROR_INVALID_ADDRESS );
 489         ptr = (void *)-1;
 490     }
 491     return ptr;
 492 }
 493
 494
 495 /***********************************************************************
 496  *           do_relocations
 497  *
 498  * Apply the relocations to a mapped PE image
 499  */
 500 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
 501                            int delta, DWORD total_size )
 502 {
 503     IMAGE_BASE_RELOCATION *rel;
 504
 505     TRACE_(module)( "relocating from %p-%p to %p-%p\n",
 506                     base - delta, base - delta + total_size, base, base + total_size );
 507
 508     for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
 509          ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
 510          rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
 511     {
 512         char *page = base + rel->VirtualAddress;
 513         WORD *TypeOffset = (WORD *)(rel + 1);
 514         int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
 515
 516         if (!count) continue;
 517
 518         /* sanity checks */
 519         if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
 520             page > base + total_size)
 521         {
 522             ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
 523                          rel, rel->VirtualAddress, rel->SizeOfBlock,
 524                          base, dir->VirtualAddress, dir->Size );
 525             return 0;
 526         }
 527
 528         TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
 529
 530         /* patching in reverse order */
 531         for (i = 0 ; i < count; i++)
 532         {
 533             int offset = TypeOffset[i] & 0xFFF;
 534             int type = TypeOffset[i] >> 12;
 535             switch(type)
 536             {
 537             case IMAGE_REL_BASED_ABSOLUTE:
 538                 break;
 539             case IMAGE_REL_BASED_HIGH:
 540                 *(short*)(page+offset) += HIWORD(delta);
 541                 break;
 542             case IMAGE_REL_BASED_LOW:
 543                 *(short*)(page+offset) += LOWORD(delta);
 544                 break;
 545             case IMAGE_REL_BASED_HIGHLOW:
 546                 *(int*)(page+offset) += delta;
 547                 /* FIXME: if this is an exported address, fire up enhanced logic */
 548                 break;
 549             default:
 550                 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
 551                 break;
 552             }
 553         }
 554     }
 555     return 1;
 556 }
 557
 558
 559 /***********************************************************************
 560  *           map_image
 561  *
 562  * Map an executable (PE format) image into memory.
 563  */
 564 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
 565                          DWORD header_size, HANDLE shared_file, DWORD shared_size,
 566                          BOOL removable )
 567 {
 568     IMAGE_DOS_HEADER *dos;
 569     IMAGE_NT_HEADERS *nt;
 570     IMAGE_SECTION_HEADER *sec;
 571     IMAGE_DATA_DIRECTORY *imports;
 572     int i, pos;
 573     DWORD err = GetLastError();
 574     FILE_VIEW *view;
 575     char *ptr;
 576     int shared_fd = -1;
 577
 578     SetLastError( ERROR_BAD_EXE_FORMAT );  /* generic error */
 579
 580     /* zero-map the whole range */
 581
 582     if (base < (char *)0x110000 ||  /* make sure the DOS area remains free */
 583         (ptr = wine_anon_mmap( base, total_size,
 584                                PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
 585     {
 586         ptr = wine_anon_mmap( NULL, total_size,
 587                             PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
 588         if (ptr == (char *)-1)
 589         {
 590             ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
 591             goto error;
 592         }
 593     }
 594     TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
 595
 596     /* map the header */
 597
 598     if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
 599                       MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
 600     dos = (IMAGE_DOS_HEADER *)ptr;
 601     nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
 602     if ((char *)(nt + 1) > ptr + header_size) goto error;
 603
 604     sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 605     if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
 606
 607     imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
 608     if (!imports->Size || !imports->VirtualAddress) imports = NULL;
 609
 610     /* check the architecture */
 611
 612     if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
 613     {
 614         MESSAGE("Trying to load PE image for unsupported architecture (");
 615         switch (nt->FileHeader.Machine)
 616         {
 617         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 618         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 619         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 620         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 621         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 622         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 623         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 624         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 625         }
 626         MESSAGE(")\n");
 627         goto error;
 628     }
 629
 630     /* retrieve the shared sections file */
 631
 632     if (shared_size)
 633     {
 634         if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
 635         CloseHandle( shared_file );  /* we no longer need it */
 636         shared_file = 0;
 637     }
 638
 639     /* map all the sections */
 640
 641     for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 642     {
 643         DWORD size;
 644
 645         /* a few sanity checks */
 646         size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 647         if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
 648         {
 649             ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
 650                           sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
 651             goto error;
 652         }
 653
 654         if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
 655             (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
 656         {
 657             size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
 658             TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
 659                           sec->Name, ptr + sec->VirtualAddress,
 660                           sec->PointerToRawData, pos, sec->SizeOfRawData,
 661                           size, sec->Characteristics );
 662             if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
 663                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 664                               MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
 665             {
 666                 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
 667                 goto error;
 668             }
 669
 670             /* check if the import directory falls inside this section */
 671             if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 672                 imports->VirtualAddress < sec->VirtualAddress + size)
 673             {
 674                 DWORD base = imports->VirtualAddress & ~page_mask;
 675                 DWORD end = imports->VirtualAddress + ROUND_SIZE( imports->VirtualAddress,
 676                                                                   imports->Size );
 677                 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
 678                 if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
 679                                               pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 680                                               MAP_PRIVATE|MAP_FIXED, NULL );
 681             }
 682             pos += size;
 683             continue;
 684         }
 685
 686         TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
 687                         sec->Name, ptr + sec->VirtualAddress,
 688                         sec->PointerToRawData, sec->SizeOfRawData,
 689                         sec->Characteristics );
 690
 691         if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
 692         if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
 693
 694         /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
 695          *       fall back to read(), so we don't need to check anything here.
 696          */
 697         if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
 698                           sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
 699                           MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
 700         {
 701             ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
 702             goto error;
 703         }
 704
 705         if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
 706         {
 707             DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
 708             if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
 709             TRACE_(module)("clearing %p - %p\n",
 710                            ptr + sec->VirtualAddress + sec->SizeOfRawData,
 711                            ptr + sec->VirtualAddress + end );
 712             memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
 713                     end - sec->SizeOfRawData );
 714         }
 715     }
 716
 717
 718     /* perform base relocation, if necessary */
 719
 720     if (ptr != base)
 721     {
 722         const IMAGE_DATA_DIRECTORY *relocs;
 723
 724         relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
 725         if (!relocs->VirtualAddress || !relocs->Size)
 726         {
 727             if (nt->OptionalHeader.ImageBase == 0x400000)
 728                 ERR("Standard load address for a Win32 program (0x00400000) not available - security-patched kernel ?\n");
 729             else
 730                 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
 731                      nt->OptionalHeader.ImageBase );
 732             SetLastError( ERROR_BAD_EXE_FORMAT );
 733             goto error;
 734         }
 735
 736         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
 737          *        really make sure that the *new* base address is also > 2GB.
 738          *        Some DLLs really check the MSB of the module handle :-/
 739          */
 740         if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
 741             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
 742
 743         if (!do_relocations( ptr, relocs, ptr - base, total_size ))
 744         {
 745             SetLastError( ERROR_BAD_EXE_FORMAT );
 746             goto error;
 747         }
 748     }
 749
 750     if (removable) hmapping = 0;  /* don't keep handle open on removable media */
 751     if (!(view = VIRTUAL_CreateView( ptr, total_size, 0, VPROT_COMMITTED|VPROT_READ, hmapping )))
 752     {
 753         SetLastError( ERROR_OUTOFMEMORY );
 754         goto error;
 755     }
 756
 757     /* set the image protections */
 758
 759     sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
 760     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 761     {
 762         DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
 763         BYTE vprot = VPROT_COMMITTED;
 764         if (sec->Characteristics & IMAGE_SCN_MEM_READ)    vprot |= VPROT_READ;
 765         if (sec->Characteristics & IMAGE_SCN_MEM_WRITE)   vprot |= VPROT_WRITE|VPROT_WRITECOPY;
 766         if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
 767
 768         /* make sure the import directory is writable */
 769         if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
 770             imports->VirtualAddress < sec->VirtualAddress + size)
 771             vprot |= VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY;
 772
 773         VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
 774     }
 775
 776     SetLastError( err );  /* restore last error */
 777     close( fd );
 778     if (shared_fd != -1) close( shared_fd );
 779     return ptr;
 780
 781  error:
 782     if (ptr != (char *)-1) munmap( ptr, total_size );
 783     close( fd );
 784     if (shared_fd != -1) close( shared_fd );
 785     if (shared_file) CloseHandle( shared_file );
 786     return NULL;
 787 }
 788
 789
 790 /***********************************************************************
 791  *           VIRTUAL_Init
 792  */
 793 #ifndef page_mask
 794 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
 795 {
 796     page_size = getpagesize();
 797     page_mask = page_size - 1;
 798     /* Make sure we have a power of 2 */
 799     assert( !(page_size & page_mask) );
 800     page_shift = 0;
 801     while ((1 << page_shift) != page_size) page_shift++;
 802 }
 803 #endif  /* page_mask */
 804
 805
 806 /***********************************************************************
 807  *           VIRTUAL_SetFaultHandler
 808  */
 809 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
 810 {
 811     FILE_VIEW *view;
 812
 813     if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
 814     view->handlerProc = proc;
 815     view->handlerArg  = arg;
 816     return TRUE;
 817 }
 818
 819 /***********************************************************************
 820  *           VIRTUAL_HandleFault
 821  */
 822 DWORD VIRTUAL_HandleFault( LPCVOID addr )
 823 {
 824     FILE_VIEW *view = VIRTUAL_FindView( addr );
 825     DWORD ret = EXCEPTION_ACCESS_VIOLATION;
 826
 827     if (view)
 828     {
 829         if (view->handlerProc)
 830         {
 831             if (view->handlerProc(view->handlerArg, addr)) ret = 0;  /* handled */
 832         }
 833         else
 834         {
 835             BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
 836             void *page = (void *)((UINT_PTR)addr & ~page_mask);
 837             char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
 838             if (vprot & VPROT_GUARD)
 839             {
 840                 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
 841                 ret = STATUS_GUARD_PAGE_VIOLATION;
 842             }
 843             /* is it inside the stack guard pages? */
 844             if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
 845                 ret = STATUS_STACK_OVERFLOW;
 846         }
 847     }
 848     return ret;
 849 }
 850
 851
 852
 853 /***********************************************************************
 854  *           unaligned_mmap
 855  *
 856  * Linux kernels before 2.4.x can support non page-aligned offsets, as
 857  * long as the offset is aligned to the filesystem block size. This is
 858  * a big performance gain so we want to take advantage of it.
 859  *
 860  * However, when we use 64-bit file support this doesn't work because
 861  * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
 862  * in that it rounds unaligned offsets down to a page boundary. For
 863  * these reasons we do a direct system call here.
 864  */
 865 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
 866                              unsigned int flags, int fd, unsigned int offset_low,
 867                              unsigned int offset_high )
 868 {
 869 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
 870     if (!offset_high && (offset_low & page_mask))
 871     {
 872         int ret;
 873
 874         struct
 875         {
 876             void        *addr;
 877             unsigned int length;
 878             unsigned int prot;
 879             unsigned int flags;
 880             unsigned int fd;
 881             unsigned int offset;
 882         } args;
 883
 884         args.addr   = addr;
 885         args.length = length;
 886         args.prot   = prot;
 887         args.flags  = flags;
 888         args.fd     = fd;
 889         args.offset = offset_low;
 890
 891         __asm__ __volatile__("push %%ebx\n\t"
 892                              "movl %2,%%ebx\n\t"
 893                              "int $0x80\n\t"
 894                              "popl %%ebx"
 895                              : "=a" (ret)
 896                              : "0" (90), /* SYS_mmap */
 897                                "g" (&args) );
 898         if (ret < 0 && ret > -4096)
 899         {
 900             errno = -ret;
 901             ret = -1;
 902         }
 903         return (void *)ret;
 904     }
 905 #endif
 906     return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
 907 }
 908
 909
 910 /***********************************************************************
 911  *           VIRTUAL_mmap
 912  *
 913  * Wrapper for mmap() that handles anonymous mappings portably,
 914  * and falls back to read if mmap of a file fails.
 915  */
 916 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
 917                             DWORD offset_low, DWORD offset_high,
 918                             int prot, int flags, BOOL *removable )
 919 {
 920     int pos;
 921     LPVOID ret;
 922     off_t offset;
 923     BOOL is_shared_write = FALSE;
 924
 925     if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
 926
 927     if (prot & PROT_WRITE)
 928     {
 929 #ifdef MAP_SHARED
 930         if (flags & MAP_SHARED) is_shared_write = TRUE;
 931 #endif
 932 #ifdef MAP_PRIVATE
 933         if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
 934 #endif
 935     }
 936
 937     if (removable && *removable)
 938     {
 939         /* if on removable media, try using read instead of mmap */
 940         if (!is_shared_write) goto fake_mmap;
 941         *removable = FALSE;
 942     }
 943
 944     if ((ret = unaligned_mmap( start, size, prot, flags, fd,
 945                                offset_low, offset_high )) != (LPVOID)-1) return ret;
 946
 947     /* mmap() failed; if this is because the file offset is not    */
 948     /* page-aligned (EINVAL), or because the underlying filesystem */
 949     /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
 950
 951     if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
 952     if (is_shared_write) return ret;  /* we cannot fake shared write mappings */
 953
 954  fake_mmap:
 955     /* Reserve the memory with an anonymous mmap */
 956     ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
 957     if (ret == (LPVOID)-1) return ret;
 958     /* Now read in the file */
 959     offset = ((off_t)offset_high << 32) | offset_low;
 960     if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
 961     {
 962         munmap( ret, size );
 963         return (LPVOID)-1;
 964     }
 965     read( fd, ret, size );
 966     lseek( fd, pos, SEEK_SET );  /* Restore the file pointer */
 967     mprotect( ret, size, prot );  /* Set the right protection */
 968     return ret;
 969 }
 970
 971
 972 /***********************************************************************
 973  *             VirtualAlloc   (KERNEL32.@)
 974  * Reserves or commits a region of pages in virtual address space
 975  *
 976  * RETURNS
 977  *      Base address of allocated region of pages
 978  *      NULL: Failure
 979  */
 980 LPVOID WINAPI VirtualAlloc(
 981               LPVOID addr,  /* [in] Address of region to reserve or commit */
 982               DWORD size,   /* [in] Size of region */
 983               DWORD type,   /* [in] Type of allocation */
 984               DWORD protect)/* [in] Type of access protection */
 985 {
 986     FILE_VIEW *view;
 987     char *ptr, *base;
 988     BYTE vprot;
 989
 990     TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
 991
 992     /* Round parameters to a page boundary */
 993
 994     if (size > 0x7fc00000)  /* 2Gb - 4Mb */
 995     {
 996         SetLastError( ERROR_OUTOFMEMORY );
 997         return NULL;
 998     }
 999     if (addr)
1000     {
1001         if (type & MEM_RESERVE) /* Round down to 64k boundary */
1002             base = ROUND_ADDR( addr, granularity_mask );
1003         else
1004             base = ROUND_ADDR( addr, page_mask );
1005         size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1006
1007         /* disallow low 64k, wrap-around and kernel space */
1008         if ((base <= (char *)granularity_mask) ||
1009             (base + size < base) ||
1010             (base + size > (char *)ADDRESS_SPACE_LIMIT))
1011         {
1012             SetLastError( ERROR_INVALID_PARAMETER );
1013             return NULL;
1014         }
1015     }
1016     else
1017     {
1018         base = 0;
1019         size = (size + page_mask) & ~page_mask;
1020     }
1021
1022     if (type & MEM_TOP_DOWN) {
1023         /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
1024          *        Is there _ANY_ way to do it with UNIX mmap()?
1025          */
1026         WARN("MEM_TOP_DOWN ignored\n");
1027         type &= ~MEM_TOP_DOWN;
1028     }
1029     /* Compute the alloc type flags */
1030
1031     if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
1032         (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
1033     {
1034         ERR("called with wrong alloc type flags (%08lx) !\n", type);
1035         SetLastError( ERROR_INVALID_PARAMETER );
1036         return NULL;
1037     }
1038     if (type & (MEM_COMMIT | MEM_SYSTEM))
1039         vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
1040     else vprot = 0;
1041
1042     /* Reserve the memory */
1043
1044     if ((type & MEM_RESERVE) || !base)
1045     {
1046         if (type & MEM_SYSTEM)
1047         {
1048             if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
1049             {
1050                 SetLastError( ERROR_OUTOFMEMORY );
1051                 return NULL;
1052             }
1053             return (LPVOID)base;
1054         }
1055         ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
1056         if (ptr == (void *)-1) return NULL;
1057
1058         if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
1059         {
1060             munmap( ptr, size );
1061             SetLastError( ERROR_OUTOFMEMORY );
1062             return NULL;
1063         }
1064         return ptr;
1065     }
1066
1067     /* Commit the pages */
1068
1069     if (!(view = VIRTUAL_FindView( base )) ||
1070         (base + size > (char *)view->base + view->size))
1071     {
1072         SetLastError( ERROR_INVALID_ADDRESS );
1073         return NULL;
1074     }
1075
1076     if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
1077     return (LPVOID)base;
1078 }
1079
1080
1081 /***********************************************************************
1082  *             VirtualAllocEx   (KERNEL32.@)
1083  *
1084  * Seems to be just as VirtualAlloc, but with process handle.
1085  */
1086 LPVOID WINAPI VirtualAllocEx(
1087               HANDLE hProcess, /* [in] Handle of process to do mem operation */
1088               LPVOID addr,  /* [in] Address of region to reserve or commit */
1089               DWORD size,   /* [in] Size of region */
1090               DWORD type,   /* [in] Type of allocation */
1091               DWORD protect /* [in] Type of access protection */
1092 ) {
1093     if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
1094         return VirtualAlloc( addr, size, type, protect );
1095     ERR("Unsupported on other process\n");
1096     return NULL;
1097 }
1098
1099
1100 /***********************************************************************
1101  *             VirtualFree   (KERNEL32.@)
1102  * Release or decommits a region of pages in virtual address space.
1103  *
1104  * RETURNS
1105  *      TRUE: Success
1106  *      FALSE: Failure
1107  */
1108 BOOL WINAPI VirtualFree(
1109               LPVOID addr, /* [in] Address of region of committed pages */
1110               DWORD size,  /* [in] Size of region */
1111               DWORD type   /* [in] Type of operation */
1112 ) {
1113     FILE_VIEW *view;
1114     char *base;
1115
1116     TRACE("%p %08lx %lx\n", addr, size, type );
1117
1118     /* Fix the parameters */
1119
1120     size = ROUND_SIZE( addr, size );
1121     base = ROUND_ADDR( addr, page_mask );
1122
1123     if (!(view = VIRTUAL_FindView( base )) ||
1124         (base + size > (char *)view->base + view->size) ||
1125         !(view->flags & VFLAG_VALLOC))
1126     {
1127         SetLastError( ERROR_INVALID_PARAMETER );
1128         return FALSE;
1129     }
1130
1131     /* Check the type */
1132
1133     if (type & MEM_SYSTEM)
1134     {
1135         view->flags |= VFLAG_SYSTEM;
1136         type &= ~MEM_SYSTEM;
1137     }
1138
1139     if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
1140     {
1141         ERR("called with wrong free type flags (%08lx) !\n", type);
1142         SetLastError( ERROR_INVALID_PARAMETER );
1143         return FALSE;
1144     }
1145
1146     /* Free the pages */
1147
1148     if (type == MEM_RELEASE)
1149     {
1150         if (size || (base != view->base))
1151         {
1152             SetLastError( ERROR_INVALID_PARAMETER );
1153             return FALSE;
1154         }
1155         VIRTUAL_DeleteView( view );
1156         return TRUE;
1157     }
1158
1159     /* Decommit the pages by remapping zero-pages instead */
1160
1161     if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1162         ERR( "Could not remap pages, expect trouble\n" );
1163     return VIRTUAL_SetProt( view, base, size, 0 );
1164 }
1165
1166
1167 /***********************************************************************
1168  *             VirtualLock   (KERNEL32.@)
1169  * Locks the specified region of virtual address space
1170  *
1171  * NOTE
1172  *      Always returns TRUE
1173  *
1174  * RETURNS
1175  *      TRUE: Success
1176  *      FALSE: Failure
1177  */
1178 BOOL WINAPI VirtualLock(
1179               LPVOID addr, /* [in] Address of first byte of range to lock */
1180               DWORD size   /* [in] Number of bytes in range to lock */
1181 ) {
1182     return TRUE;
1183 }
1184
1185
1186 /***********************************************************************
1187  *             VirtualUnlock   (KERNEL32.@)
1188  * Unlocks a range of pages in the virtual address space
1189  *
1190  * NOTE
1191  *      Always returns TRUE
1192  *
1193  * RETURNS
1194  *      TRUE: Success
1195  *      FALSE: Failure
1196  */
1197 BOOL WINAPI VirtualUnlock(
1198               LPVOID addr, /* [in] Address of first byte of range */
1199               DWORD size   /* [in] Number of bytes in range */
1200 ) {
1201     return TRUE;
1202 }
1203
1204
1205 /***********************************************************************
1206  *             VirtualProtect   (KERNEL32.@)
1207  * Changes the access protection on a region of committed pages
1208  *
1209  * RETURNS
1210  *      TRUE: Success
1211  *      FALSE: Failure
1212  */
1213 BOOL WINAPI VirtualProtect(
1214               LPVOID addr,     /* [in] Address of region of committed pages */
1215               DWORD size,      /* [in] Size of region */
1216               DWORD new_prot,  /* [in] Desired access protection */
1217               LPDWORD old_prot /* [out] Address of variable to get old protection */
1218 ) {
1219     FILE_VIEW *view;
1220     char *base;
1221     UINT i;
1222     BYTE vprot, *p;
1223     DWORD prot;
1224
1225     TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1226
1227     /* Fix the parameters */
1228
1229     size = ROUND_SIZE( addr, size );
1230     base = ROUND_ADDR( addr, page_mask );
1231
1232     if (!(view = VIRTUAL_FindView( base )) ||
1233         (base + size > (char *)view->base + view->size))
1234     {
1235         SetLastError( ERROR_INVALID_PARAMETER );
1236         return FALSE;
1237     }
1238
1239     /* Make sure all the pages are committed */
1240
1241     p = view->prot + ((base - (char *)view->base) >> page_shift);
1242     VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1243     for (i = size >> page_shift; i; i--, p++)
1244     {
1245         if (!(*p & VPROT_COMMITTED))
1246         {
1247             SetLastError( ERROR_INVALID_PARAMETER );
1248             return FALSE;
1249         }
1250     }
1251
1252     if (old_prot) *old_prot = prot;
1253     vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1254     return VIRTUAL_SetProt( view, base, size, vprot );
1255 }
1256
1257
1258 /***********************************************************************
1259  *             VirtualProtectEx   (KERNEL32.@)
1260  * Changes the access protection on a region of committed pages in the
1261  * virtual address space of a specified process
1262  *
1263  * RETURNS
1264  *      TRUE: Success
1265  *      FALSE: Failure
1266  */
1267 BOOL WINAPI VirtualProtectEx(
1268               HANDLE handle, /* [in]  Handle of process */
1269               LPVOID addr,     /* [in]  Address of region of committed pages */
1270               DWORD size,      /* [in]  Size of region */
1271               DWORD new_prot,  /* [in]  Desired access protection */
1272               LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1273 {
1274     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1275         return VirtualProtect( addr, size, new_prot, old_prot );
1276     ERR("Unsupported on other process\n");
1277     return FALSE;
1278 }
1279
1280
1281 /***********************************************************************
1282  *             VirtualQuery   (KERNEL32.@)
1283  * Provides info about a range of pages in virtual address space
1284  *
1285  * RETURNS
1286  *      Number of bytes returned in information buffer
1287  *      or 0 if addr is >= 0xc0000000 (kernel space).
1288  */
1289 DWORD WINAPI VirtualQuery(
1290              LPCVOID addr,                    /* [in]  Address of region */
1291              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1292              DWORD len                        /* [in]  Size of buffer */
1293 ) {
1294     FILE_VIEW *view;
1295     char *base, *alloc_base = 0;
1296     UINT size = 0;
1297
1298     if (addr >= ADDRESS_SPACE_LIMIT) return 0;
1299
1300     base = ROUND_ADDR( addr, page_mask );
1301
1302     /* Find the view containing the address */
1303
1304     EnterCriticalSection(&csVirtual);
1305     view = VIRTUAL_FirstView;
1306     for (;;)
1307     {
1308         if (!view)
1309         {
1310             size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1311             break;
1312         }
1313         if ((char *)view->base > base)
1314         {
1315             size = (char *)view->base - alloc_base;
1316             view = NULL;
1317             break;
1318         }
1319         if ((char *)view->base + view->size > base)
1320         {
1321             alloc_base = view->base;
1322             size = view->size;
1323             break;
1324         }
1325         alloc_base = (char *)view->base + view->size;
1326         view = view->next;
1327     }
1328     LeaveCriticalSection(&csVirtual);
1329
1330     /* Fill the info structure */
1331
1332     if (!view)
1333     {
1334         info->State             = MEM_FREE;
1335         info->Protect           = 0;
1336         info->AllocationProtect = 0;
1337         info->Type              = 0;
1338     }
1339     else
1340     {
1341         BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1342         VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1343         for (size = base - alloc_base; size < view->size; size += page_mask+1)
1344             if (view->prot[size >> page_shift] != vprot) break;
1345         info->AllocationProtect = view->protect;
1346         info->Type              = MEM_PRIVATE;  /* FIXME */
1347     }
1348
1349     info->BaseAddress    = (LPVOID)base;
1350     info->AllocationBase = (LPVOID)alloc_base;
1351     info->RegionSize     = size - (base - alloc_base);
1352     return sizeof(*info);
1353 }
1354
1355
1356 /***********************************************************************
1357  *             VirtualQueryEx   (KERNEL32.@)
1358  * Provides info about a range of pages in virtual address space of a
1359  * specified process
1360  *
1361  * RETURNS
1362  *      Number of bytes returned in information buffer
1363  */
1364 DWORD WINAPI VirtualQueryEx(
1365              HANDLE handle,                 /* [in] Handle of process */
1366              LPCVOID addr,                    /* [in] Address of region */
1367              LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1368              DWORD len                        /* [in] Size of buffer */ )
1369 {
1370     if (MapProcessHandle( handle ) == GetCurrentProcessId())
1371         return VirtualQuery( addr, info, len );
1372     ERR("Unsupported on other process\n");
1373     return 0;
1374 }
1375
1376
1377 /***********************************************************************
1378  *             IsBadReadPtr   (KERNEL32.@)
1379  *
1380  * RETURNS
1381  *      FALSE: Process has read access to entire block
1382  *      TRUE: Otherwise
1383  */
1384 BOOL WINAPI IsBadReadPtr(
1385               LPCVOID ptr, /* [in] Address of memory block */
1386               UINT size )  /* [in] Size of block */
1387 {
1388     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1389     __TRY
1390     {
1391         volatile const char *p = ptr;
1392         char dummy;
1393         UINT count = size;
1394
1395         while (count > page_size)
1396         {
1397             dummy = *p;
1398             p += page_size;
1399             count -= page_size;
1400         }
1401         dummy = p[0];
1402         dummy = p[count - 1];
1403     }
1404     __EXCEPT(page_fault) { return TRUE; }
1405     __ENDTRY
1406     return FALSE;
1407 }
1408
1409
1410 /***********************************************************************
1411  *             IsBadWritePtr   (KERNEL32.@)
1412  *
1413  * RETURNS
1414  *      FALSE: Process has write access to entire block
1415  *      TRUE: Otherwise
1416  */
1417 BOOL WINAPI IsBadWritePtr(
1418               LPVOID ptr, /* [in] Address of memory block */
1419               UINT size ) /* [in] Size of block in bytes */
1420 {
1421     if (!size) return FALSE;  /* handle 0 size case w/o reference */
1422     __TRY
1423     {
1424         volatile char *p = ptr;
1425         UINT count = size;
1426
1427         while (count > page_size)
1428         {
1429             *p |= 0;
1430             p += page_size;
1431             count -= page_size;
1432         }
1433         p[0] |= 0;
1434         p[count - 1] |= 0;
1435     }
1436     __EXCEPT(page_fault) { return TRUE; }
1437     __ENDTRY
1438     return FALSE;
1439 }
1440
1441
1442 /***********************************************************************
1443  *             IsBadHugeReadPtr   (KERNEL32.@)
1444  * RETURNS
1445  *      FALSE: Process has read access to entire block
1446  *      TRUE: Otherwise
1447  */
1448 BOOL WINAPI IsBadHugeReadPtr(
1449               LPCVOID ptr, /* [in] Address of memory block */
1450               UINT size  /* [in] Size of block */
1451 ) {
1452     return IsBadReadPtr( ptr, size );
1453 }
1454
1455
1456 /***********************************************************************
1457  *             IsBadHugeWritePtr   (KERNEL32.@)
1458  * RETURNS
1459  *      FALSE: Process has write access to entire block
1460  *      TRUE: Otherwise
1461  */
1462 BOOL WINAPI IsBadHugeWritePtr(
1463               LPVOID ptr, /* [in] Address of memory block */
1464               UINT size /* [in] Size of block */
1465 ) {
1466     return IsBadWritePtr( ptr, size );
1467 }
1468
1469
1470 /***********************************************************************
1471  *             IsBadCodePtr   (KERNEL32.@)
1472  *
1473  * RETURNS
1474  *      FALSE: Process has read access to specified memory
1475  *      TRUE: Otherwise
1476  */
1477 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1478 {
1479     return IsBadReadPtr( ptr, 1 );
1480 }
1481
1482
1483 /***********************************************************************
1484  *             IsBadStringPtrA   (KERNEL32.@)
1485  *
1486  * RETURNS
1487  *      FALSE: Read access to all bytes in string
1488  *      TRUE: Else
1489  */
1490 BOOL WINAPI IsBadStringPtrA(
1491               LPCSTR str, /* [in] Address of string */
1492               UINT max )  /* [in] Maximum size of string */
1493 {
1494     __TRY
1495     {
1496         volatile const char *p = str;
1497         while (p != str + max) if (!*p++) break;
1498     }
1499     __EXCEPT(page_fault) { return TRUE; }
1500     __ENDTRY
1501     return FALSE;
1502 }
1503
1504
1505 /***********************************************************************
1506  *             IsBadStringPtrW   (KERNEL32.@)
1507  * See IsBadStringPtrA
1508  */
1509 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1510 {
1511     __TRY
1512     {
1513         volatile const WCHAR *p = str;
1514         while (p != str + max) if (!*p++) break;
1515     }
1516     __EXCEPT(page_fault) { return TRUE; }
1517     __ENDTRY
1518     return FALSE;
1519 }
1520
1521
1522 /***********************************************************************
1523  *             CreateFileMappingA   (KERNEL32.@)
1524  * Creates a named or unnamed file-mapping object for the specified file
1525  *
1526  * RETURNS
1527  *      Handle: Success
1528  *      0: Mapping object does not exist
1529  *      NULL: Failure
1530  */
1531 HANDLE WINAPI CreateFileMappingA(
1532                 HANDLE hFile,   /* [in] Handle of file to map */
1533                 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1534                 DWORD protect,   /* [in] Protection for mapping object */
1535                 DWORD size_high, /* [in] High-order 32 bits of object size */
1536                 DWORD size_low,  /* [in] Low-order 32 bits of object size */
1537                 LPCSTR name      /* [in] Name of file-mapping object */ )
1538 {
1539     WCHAR buffer[MAX_PATH];
1540
1541     if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1542
1543     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1544     {
1545         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1546         return 0;
1547     }
1548     return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1549 }
1550
1551
1552 /***********************************************************************
1553  *             CreateFileMappingW   (KERNEL32.@)
1554  * See CreateFileMappingA
1555  */
1556 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1557                                   DWORD protect, DWORD size_high,
1558                                   DWORD size_low, LPCWSTR name )
1559 {
1560     HANDLE ret;
1561     BYTE vprot;
1562     DWORD len = name ? strlenW(name) : 0;
1563
1564     /* Check parameters */
1565
1566     TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1567           hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1568
1569     if (len > MAX_PATH)
1570     {
1571         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1572         return 0;
1573     }
1574
1575     vprot = VIRTUAL_GetProt( protect );
1576     if (protect & SEC_RESERVE)
1577     {
1578         if (hFile != INVALID_HANDLE_VALUE)
1579         {
1580             SetLastError( ERROR_INVALID_PARAMETER );
1581             return 0;
1582         }
1583     }
1584     else vprot |= VPROT_COMMITTED;
1585     if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1586     if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1587
1588     /* Create the server object */
1589
1590     if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1591     SERVER_START_REQ( create_mapping )
1592     {
1593         req->file_handle = hFile;
1594         req->size_high   = size_high;
1595         req->size_low    = size_low;
1596         req->protect     = vprot;
1597         req->inherit     = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1598         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1599         SetLastError(0);
1600         wine_server_call_err( req );
1601         ret = reply->handle;
1602     }
1603     SERVER_END_REQ;
1604     return ret;
1605 }
1606
1607
1608 /***********************************************************************
1609  *             OpenFileMappingA   (KERNEL32.@)
1610  * Opens a named file-mapping object.
1611  *
1612  * RETURNS
1613  *      Handle: Success
1614  *      NULL: Failure
1615  */
1616 HANDLE WINAPI OpenFileMappingA(
1617                 DWORD access,   /* [in] Access mode */
1618                 BOOL inherit, /* [in] Inherit flag */
1619                 LPCSTR name )   /* [in] Name of file-mapping object */
1620 {
1621     WCHAR buffer[MAX_PATH];
1622
1623     if (!name) return OpenFileMappingW( access, inherit, NULL );
1624
1625     if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1626     {
1627         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1628         return 0;
1629     }
1630     return OpenFileMappingW( access, inherit, buffer );
1631 }
1632
1633
1634 /***********************************************************************
1635  *             OpenFileMappingW   (KERNEL32.@)
1636  * See OpenFileMappingA
1637  */
1638 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1639 {
1640     HANDLE ret;
1641     DWORD len = name ? strlenW(name) : 0;
1642     if (len >= MAX_PATH)
1643     {
1644         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1645         return 0;
1646     }
1647     SERVER_START_REQ( open_mapping )
1648     {
1649         req->access  = access;
1650         req->inherit = inherit;
1651         wine_server_add_data( req, name, len * sizeof(WCHAR) );
1652         wine_server_call_err( req );
1653         ret = reply->handle;
1654     }
1655     SERVER_END_REQ;
1656     return ret;
1657 }
1658
1659
1660 /***********************************************************************
1661  *             MapViewOfFile   (KERNEL32.@)
1662  * Maps a view of a file into the address space
1663  *
1664  * RETURNS
1665  *      Starting address of mapped view
1666  *      NULL: Failure
1667  */
1668 LPVOID WINAPI MapViewOfFile(
1669               HANDLE mapping,  /* [in] File-mapping object to map */
1670               DWORD access,      /* [in] Access mode */
1671               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1672               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1673               DWORD count        /* [in] Number of bytes to map */
1674 ) {
1675     return MapViewOfFileEx( mapping, access, offset_high,
1676                             offset_low, count, NULL );
1677 }
1678
1679
1680 /***********************************************************************
1681  *             MapViewOfFileEx   (KERNEL32.@)
1682  * Maps a view of a file into the address space
1683  *
1684  * RETURNS
1685  *      Starting address of mapped view
1686  *      NULL: Failure
1687  */
1688 LPVOID WINAPI MapViewOfFileEx(
1689               HANDLE handle,   /* [in] File-mapping object to map */
1690               DWORD access,      /* [in] Access mode */
1691               DWORD offset_high, /* [in] High-order 32 bits of file offset */
1692               DWORD offset_low,  /* [in] Low-order 32 bits of file offset */
1693               DWORD count,       /* [in] Number of bytes to map */
1694               LPVOID addr        /* [in] Suggested starting address for mapped view */
1695 ) {
1696     FILE_VIEW *view;
1697     UINT size = 0;
1698     int flags = MAP_PRIVATE;
1699     int unix_handle = -1;
1700     int prot, res;
1701     void *base, *ptr = (void *)-1, *ret;
1702     DWORD size_low, size_high, header_size, shared_size;
1703     HANDLE shared_file;
1704     BOOL removable;
1705
1706     /* Check parameters */
1707
1708     if ((offset_low & granularity_mask) ||
1709         (addr && ((UINT_PTR)addr & granularity_mask)))
1710     {
1711         SetLastError( ERROR_INVALID_PARAMETER );
1712         return NULL;
1713     }
1714
1715     SERVER_START_REQ( get_mapping_info )
1716     {
1717         req->handle = handle;
1718         res = wine_server_call_err( req );
1719         prot        = reply->protect;
1720         base        = reply->base;
1721         size_low    = reply->size_low;
1722         size_high   = reply->size_high;
1723         header_size = reply->header_size;
1724         shared_file = reply->shared_file;
1725         shared_size = reply->shared_size;
1726         removable   = (reply->drive_type == DRIVE_REMOVABLE ||
1727                        reply->drive_type == DRIVE_CDROM);
1728     }
1729     SERVER_END_REQ;
1730     if (res) goto error;
1731
1732     if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1733
1734     if (prot & VPROT_IMAGE)
1735         return map_image( handle, unix_handle, base, size_low, header_size,
1736                           shared_file, shared_size, removable );
1737
1738
1739     if (size_high)
1740         ERR("Sizes larger than 4Gb not supported\n");
1741
1742     if ((offset_low >= size_low) ||
1743         (count > size_low - offset_low))
1744     {
1745         SetLastError( ERROR_INVALID_PARAMETER );
1746         goto error;
1747     }
1748     if (count) size = ROUND_SIZE( offset_low, count );
1749     else size = size_low - offset_low;
1750
1751     switch(access)
1752     {
1753     case FILE_MAP_ALL_ACCESS:
1754     case FILE_MAP_WRITE:
1755     case FILE_MAP_WRITE | FILE_MAP_READ:
1756         if (!(prot & VPROT_WRITE))
1757         {
1758             SetLastError( ERROR_INVALID_PARAMETER );
1759             goto error;
1760         }
1761         flags = MAP_SHARED;
1762         /* fall through */
1763     case FILE_MAP_READ:
1764     case FILE_MAP_COPY:
1765     case FILE_MAP_COPY | FILE_MAP_READ:
1766         if (prot & VPROT_READ) break;
1767         /* fall through */
1768     default:
1769         SetLastError( ERROR_INVALID_PARAMETER );
1770         goto error;
1771     }
1772
1773     /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1774      * which has a view of this mapping commits some pages, they will
1775      * appear commited in all other processes, which have the same
1776      * view created. Since we don`t support this yet, we create the
1777      * whole mapping commited.
1778      */
1779     prot |= VPROT_COMMITTED;
1780
1781     /* Reserve a properly aligned area */
1782
1783     if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1784
1785     /* Map the file */
1786
1787     TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1788
1789     ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1790                         VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1791     if (ret != ptr)
1792     {
1793         ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1794         goto error;
1795     }
1796     if (removable) handle = 0;  /* don't keep handle open on removable media */
1797
1798     if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1799     {
1800         SetLastError( ERROR_OUTOFMEMORY );
1801         goto error;
1802     }
1803     if (unix_handle != -1) close( unix_handle );
1804     return ptr;
1805
1806 error:
1807     if (unix_handle != -1) close( unix_handle );
1808     if (ptr != (void *)-1) munmap( ptr, size );
1809     return NULL;
1810 }
1811
1812
1813 /***********************************************************************
1814  *             FlushViewOfFile   (KERNEL32.@)
1815  * Writes to the disk a byte range within a mapped view of a file
1816  *
1817  * RETURNS
1818  *      TRUE: Success
1819  *      FALSE: Failure
1820  */
1821 BOOL WINAPI FlushViewOfFile(
1822               LPCVOID base, /* [in] Start address of byte range to flush */
1823               DWORD cbFlush /* [in] Number of bytes in range */
1824 ) {
1825     FILE_VIEW *view;
1826     void *addr = ROUND_ADDR( base, page_mask );
1827
1828     TRACE("FlushViewOfFile at %p for %ld bytes\n",
1829                      base, cbFlush );
1830
1831     if (!(view = VIRTUAL_FindView( addr )))
1832     {
1833         SetLastError( ERROR_INVALID_PARAMETER );
1834         return FALSE;
1835     }
1836     if (!cbFlush) cbFlush = view->size;
1837     if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1838     SetLastError( ERROR_INVALID_PARAMETER );
1839     return FALSE;
1840 }
1841
1842
1843 /***********************************************************************
1844  *             UnmapViewOfFile   (KERNEL32.@)
1845  * Unmaps a mapped view of a file.
1846  *
1847  * NOTES
1848  *      Should addr be an LPCVOID?
1849  *
1850  * RETURNS
1851  *      TRUE: Success
1852  *      FALSE: Failure
1853  */
1854 BOOL WINAPI UnmapViewOfFile(
1855               LPVOID addr /* [in] Address where mapped view begins */
1856 ) {
1857     FILE_VIEW *view;
1858     void *base = ROUND_ADDR( addr, page_mask );
1859     if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1860     {
1861         SetLastError( ERROR_INVALID_PARAMETER );
1862         return FALSE;
1863     }
1864     VIRTUAL_DeleteView( view );
1865     return TRUE;
1866 }