2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
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.
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.
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
22 #include "wine/port.h"
26 #ifdef HAVE_SYS_ERRNO_H
27 #include <sys/errno.h>
34 #include <sys/types.h>
35 #ifdef HAVE_SYS_MMAN_H
40 #include "wine/exception.h"
41 #include "wine/unicode.h"
42 #include "wine/library.h"
46 #include "wine/server.h"
47 #include "msvcrt/excpt.h"
48 #include "wine/debug.h"
50 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
51 WINE_DECLARE_DEBUG_CHANNEL(module);
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 */
73 #define VFLAG_SYSTEM 0x01
74 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
76 /* Conversion from VPROT_* to Win32 flags */
77 static const BYTE VIRTUAL_Win32Flags[16] =
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 */
98 static FILE_VIEW *VIRTUAL_FirstView;
99 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
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
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) */
113 #define ROUND_ADDR(addr,mask) \
114 ((void *)((UINT_PTR)(addr) & ~(mask)))
116 #define ROUND_SIZE(addr,size) \
117 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
119 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
120 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
122 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
123 DWORD offset_high, int prot, int flags, BOOL *removable );
125 /* filter for page-fault exceptions */
126 static WINE_EXCEPTION_FILTER(page_fault)
128 if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
129 return EXCEPTION_EXECUTE_HANDLER;
130 return EXCEPTION_CONTINUE_SEARCH;
133 /***********************************************************************
136 static const char *VIRTUAL_GetProtStr( BYTE prot )
138 static char buffer[6];
139 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
140 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
141 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
142 buffer[3] = (prot & VPROT_WRITE) ?
143 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
144 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
150 /***********************************************************************
153 static void VIRTUAL_DumpView( FILE_VIEW *view )
156 char *addr = view->base;
157 BYTE prot = view->prot[0];
159 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
160 if (view->flags & VFLAG_SYSTEM)
161 DPRINTF( " (system)\n" );
162 else if (view->flags & VFLAG_VALLOC)
163 DPRINTF( " (valloc)\n" );
164 else if (view->mapping)
165 DPRINTF( " %d\n", view->mapping );
167 DPRINTF( " (anonymous)\n");
169 for (count = i = 1; i < view->size >> page_shift; i++, count++)
171 if (view->prot[i] == prot) continue;
172 DPRINTF( " %p - %p %s\n",
173 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
174 addr += (count << page_shift);
175 prot = view->prot[i];
179 DPRINTF( " %p - %p %s\n",
180 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
184 /***********************************************************************
187 void VIRTUAL_Dump(void)
190 DPRINTF( "\nDump of all virtual memory views:\n\n" );
191 EnterCriticalSection(&csVirtual);
192 view = VIRTUAL_FirstView;
195 VIRTUAL_DumpView( view );
198 LeaveCriticalSection(&csVirtual);
202 /***********************************************************************
205 * Find the view containing a given address.
211 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
215 EnterCriticalSection(&csVirtual);
216 view = VIRTUAL_FirstView;
219 if (view->base > addr)
224 if ((char*)view->base + view->size > (char*)addr) break;
227 LeaveCriticalSection(&csVirtual);
232 /***********************************************************************
235 * Create a new view and add it in the linked list.
237 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
238 BYTE vprot, HANDLE mapping )
240 FILE_VIEW *view, *prev;
242 /* Create the view structure */
244 assert( !((unsigned int)base & page_mask) );
245 assert( !(size & page_mask) );
247 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
249 view->size = size << page_shift;
251 view->mapping = mapping;
252 view->protect = vprot;
253 view->handlerProc = NULL;
254 memset( view->prot, vprot, size );
256 /* Duplicate the mapping handle */
259 !DuplicateHandle( GetCurrentProcess(), view->mapping,
260 GetCurrentProcess(), &view->mapping,
261 0, FALSE, DUPLICATE_SAME_ACCESS ))
267 /* Insert it in the linked list */
269 EnterCriticalSection(&csVirtual);
270 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
272 view->next = VIRTUAL_FirstView;
274 if (view->next) view->next->prev = view;
275 VIRTUAL_FirstView = view;
279 prev = VIRTUAL_FirstView;
280 while (prev->next && (prev->next->base < base)) prev = prev->next;
281 view->next = prev->next;
283 if (view->next) view->next->prev = view;
286 LeaveCriticalSection(&csVirtual);
287 VIRTUAL_DEBUG_DUMP_VIEW( view );
292 /***********************************************************************
299 static void VIRTUAL_DeleteView(
300 FILE_VIEW *view /* [in] View */
302 if (!(view->flags & VFLAG_SYSTEM))
303 munmap( (void *)view->base, view->size );
304 EnterCriticalSection(&csVirtual);
305 if (view->next) view->next->prev = view->prev;
306 if (view->prev) view->prev->next = view->next;
307 else VIRTUAL_FirstView = view->next;
308 LeaveCriticalSection(&csVirtual);
309 if (view->mapping) NtClose( view->mapping );
314 /***********************************************************************
315 * VIRTUAL_GetUnixProt
317 * Convert page protections to protection for mmap/mprotect.
319 static int VIRTUAL_GetUnixProt( BYTE vprot )
322 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
324 if (vprot & VPROT_READ) prot |= PROT_READ;
325 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
326 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
327 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
333 /***********************************************************************
334 * VIRTUAL_GetWin32Prot
336 * Convert page protections to Win32 flags.
341 static void VIRTUAL_GetWin32Prot(
342 BYTE vprot, /* [in] Page protection flags */
343 DWORD *protect, /* [out] Location to store Win32 protection flags */
344 DWORD *state /* [out] Location to store mem state flag */
347 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
348 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
349 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
351 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
354 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
358 /***********************************************************************
361 * Build page protections from Win32 flags.
364 * Value of page protection flags
366 static BYTE VIRTUAL_GetProt(
367 DWORD protect /* [in] Win32 protection flags */
371 switch(protect & 0xff)
377 vprot = VPROT_READ | VPROT_WRITE;
380 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
381 * that the hFile must have been opened with GENERIC_READ and
382 * GENERIC_WRITE access. This is WRONG as tests show that you
383 * only need GENERIC_READ access (at least for Win9x,
384 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
385 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
387 vprot = VPROT_READ | VPROT_WRITECOPY;
392 case PAGE_EXECUTE_READ:
393 vprot = VPROT_EXEC | VPROT_READ;
395 case PAGE_EXECUTE_READWRITE:
396 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
398 case PAGE_EXECUTE_WRITECOPY:
399 /* See comment for PAGE_WRITECOPY above */
400 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
407 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
408 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
413 /***********************************************************************
416 * Change the protection of a range of pages.
422 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
423 void *base, /* [in] Starting address */
424 UINT size, /* [in] Size in bytes */
425 BYTE vprot ) /* [in] Protections to use */
428 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
430 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
431 return FALSE; /* FIXME: last error */
433 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
434 vprot, size >> page_shift );
435 VIRTUAL_DEBUG_DUMP_VIEW( view );
440 /***********************************************************************
443 * Create an anonymous mapping aligned to the allocation granularity.
445 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
448 unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
450 if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
452 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
453 * Platform Differences":
454 * Windows NT: ERROR_INVALID_PARAMETER
455 * Windows 95: ERROR_INVALID_ADDRESS.
457 if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
460 if (GetVersion() & 0x80000000) /* win95 */
461 SetLastError( ERROR_INVALID_ADDRESS );
463 SetLastError( ERROR_INVALID_PARAMETER );
470 /* Release the extra memory while keeping the range
471 * starting on the granularity boundary. */
472 if ((unsigned int)ptr & granularity_mask)
474 unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
475 munmap( ptr, extra );
476 ptr = (char *)ptr + extra;
479 if (view_size > size)
480 munmap( (char *)ptr + size, view_size - size );
482 else if (ptr != base)
484 /* We couldn't get the address we wanted */
485 munmap( ptr, view_size );
486 SetLastError( ERROR_INVALID_ADDRESS );
493 /***********************************************************************
496 * Apply the relocations to a mapped PE image
498 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
499 int delta, DWORD total_size )
501 IMAGE_BASE_RELOCATION *rel;
503 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
504 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
505 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
507 char *page = base + rel->VirtualAddress;
508 WORD *TypeOffset = (WORD *)(rel + 1);
509 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
511 if (!count) continue;
514 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
515 page > base + total_size)
517 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
518 rel, rel->VirtualAddress, rel->SizeOfBlock,
519 base, dir->VirtualAddress, dir->Size );
523 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
525 /* patching in reverse order */
526 for (i = 0 ; i < count; i++)
528 int offset = TypeOffset[i] & 0xFFF;
529 int type = TypeOffset[i] >> 12;
532 case IMAGE_REL_BASED_ABSOLUTE:
534 case IMAGE_REL_BASED_HIGH:
535 *(short*)(page+offset) += HIWORD(delta);
537 case IMAGE_REL_BASED_LOW:
538 *(short*)(page+offset) += LOWORD(delta);
540 case IMAGE_REL_BASED_HIGHLOW:
541 *(int*)(page+offset) += delta;
542 /* FIXME: if this is an exported address, fire up enhanced logic */
545 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
554 /***********************************************************************
557 * Map an executable (PE format) image into memory.
559 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
560 DWORD header_size, HANDLE shared_file, DWORD shared_size,
563 IMAGE_DOS_HEADER *dos;
564 IMAGE_NT_HEADERS *nt;
565 IMAGE_SECTION_HEADER *sec;
566 IMAGE_DATA_DIRECTORY *imports;
568 DWORD err = GetLastError();
573 SetLastError( ERROR_BAD_EXE_FORMAT ); /* generic error */
575 /* zero-map the whole range */
577 if (base < (char *)0x110000) base = 0; /* make sure the DOS area remains free */
578 if ((ptr = wine_anon_mmap( base, total_size,
579 PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
581 ptr = wine_anon_mmap( NULL, total_size,
582 PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
583 if (ptr == (char *)-1)
585 ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
589 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
593 if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
594 MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
595 dos = (IMAGE_DOS_HEADER *)ptr;
596 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
597 if ((char *)(nt + 1) > ptr + header_size) goto error;
599 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
600 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
602 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
603 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
605 /* check the architecture */
607 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
609 MESSAGE("Trying to load PE image for unsupported architecture (");
610 switch (nt->FileHeader.Machine)
612 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
613 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
614 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
615 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
616 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
617 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
618 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
619 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
625 /* retrieve the shared sections file */
629 if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
630 CloseHandle( shared_file ); /* we no longer need it */
634 /* map all the sections */
636 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
640 /* a few sanity checks */
641 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
642 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
644 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
645 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
649 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
650 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
652 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
653 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
654 sec->Name, ptr + sec->VirtualAddress,
655 sec->PointerToRawData, pos, sec->SizeOfRawData,
656 size, sec->Characteristics );
657 if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
658 pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
659 MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
661 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
665 /* check if the import directory falls inside this section */
666 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
667 imports->VirtualAddress < sec->VirtualAddress + size)
669 DWORD base = imports->VirtualAddress & ~page_mask;
670 DWORD end = imports->VirtualAddress + ROUND_SIZE( imports->VirtualAddress,
672 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
673 if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
674 pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
675 MAP_PRIVATE|MAP_FIXED, NULL );
681 if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
682 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
684 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
685 sec->Name, ptr + sec->VirtualAddress,
686 sec->PointerToRawData, sec->SizeOfRawData,
687 sec->Characteristics );
689 /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
690 * fall back to read(), so we don't need to check anything here.
692 if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
693 sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
694 MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
696 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
700 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
702 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
703 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
704 TRACE_(module)("clearing %p - %p\n",
705 ptr + sec->VirtualAddress + sec->SizeOfRawData,
706 ptr + sec->VirtualAddress + end );
707 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
708 end - sec->SizeOfRawData );
713 /* perform base relocation, if necessary */
717 const IMAGE_DATA_DIRECTORY *relocs;
719 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
720 if (!relocs->VirtualAddress || !relocs->Size)
722 if (nt->OptionalHeader.ImageBase == 0x400000)
723 ERR("Standard load address for a Win32 program (0x00400000) not available - security-patched kernel ?\n");
725 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
726 nt->OptionalHeader.ImageBase );
727 SetLastError( ERROR_BAD_EXE_FORMAT );
731 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
732 * really make sure that the *new* base address is also > 2GB.
733 * Some DLLs really check the MSB of the module handle :-/
735 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
736 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
738 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
740 SetLastError( ERROR_BAD_EXE_FORMAT );
745 if (removable) hmapping = 0; /* don't keep handle open on removable media */
746 if (!(view = VIRTUAL_CreateView( ptr, total_size, 0, VPROT_COMMITTED|VPROT_READ, hmapping )))
748 SetLastError( ERROR_OUTOFMEMORY );
752 /* set the image protections */
754 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
755 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
757 DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
758 BYTE vprot = VPROT_COMMITTED;
759 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
760 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_WRITE|VPROT_WRITECOPY;
761 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
763 /* make sure the import directory is writable */
764 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
765 imports->VirtualAddress < sec->VirtualAddress + size)
766 vprot |= VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY;
768 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
771 SetLastError( err ); /* restore last error */
773 if (shared_fd != -1) close( shared_fd );
777 if (ptr != (char *)-1) munmap( ptr, total_size );
779 if (shared_fd != -1) close( shared_fd );
780 if (shared_file) CloseHandle( shared_file );
785 /***********************************************************************
789 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
791 page_size = getpagesize();
792 page_mask = page_size - 1;
793 /* Make sure we have a power of 2 */
794 assert( !(page_size & page_mask) );
796 while ((1 << page_shift) != page_size) page_shift++;
798 #endif /* page_mask */
801 /***********************************************************************
802 * VIRTUAL_SetFaultHandler
804 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
808 if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
809 view->handlerProc = proc;
810 view->handlerArg = arg;
814 /***********************************************************************
815 * VIRTUAL_HandleFault
817 DWORD VIRTUAL_HandleFault( LPCVOID addr )
819 FILE_VIEW *view = VIRTUAL_FindView( addr );
820 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
824 if (view->handlerProc)
826 if (view->handlerProc(view->handlerArg, addr)) ret = 0; /* handled */
830 BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
831 void *page = (void *)((UINT_PTR)addr & ~page_mask);
832 char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
833 if (vprot & VPROT_GUARD)
835 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
836 ret = STATUS_GUARD_PAGE_VIOLATION;
838 /* is it inside the stack guard pages? */
839 if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
840 ret = STATUS_STACK_OVERFLOW;
848 /***********************************************************************
851 * Linux kernels before 2.4.x can support non page-aligned offsets, as
852 * long as the offset is aligned to the filesystem block size. This is
853 * a big performance gain so we want to take advantage of it.
855 * However, when we use 64-bit file support this doesn't work because
856 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
857 * in that it rounds unaligned offsets down to a page boundary. For
858 * these reasons we do a direct system call here.
860 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
861 unsigned int flags, int fd, unsigned int offset_low,
862 unsigned int offset_high )
864 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
865 if (!offset_high && (offset_low & page_mask))
880 args.length = length;
884 args.offset = offset_low;
886 __asm__ __volatile__("push %%ebx\n\t"
891 : "0" (90), /* SYS_mmap */
893 if (ret < 0 && ret > -4096)
901 return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
905 /***********************************************************************
908 * Wrapper for mmap() that handles anonymous mappings portably,
909 * and falls back to read if mmap of a file fails.
911 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
912 DWORD offset_low, DWORD offset_high,
913 int prot, int flags, BOOL *removable )
918 BOOL is_shared_write = FALSE;
920 if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
922 if (prot & PROT_WRITE)
925 if (flags & MAP_SHARED) is_shared_write = TRUE;
928 if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
932 if (removable && *removable)
934 /* if on removable media, try using read instead of mmap */
935 if (!is_shared_write) goto fake_mmap;
939 if ((ret = unaligned_mmap( start, size, prot, flags, fd,
940 offset_low, offset_high )) != (LPVOID)-1) return ret;
942 /* mmap() failed; if this is because the file offset is not */
943 /* page-aligned (EINVAL), or because the underlying filesystem */
944 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
946 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
947 if (is_shared_write) return ret; /* we cannot fake shared write mappings */
950 /* Reserve the memory with an anonymous mmap */
951 ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
952 if (ret == (LPVOID)-1) return ret;
953 /* Now read in the file */
954 offset = ((off_t)offset_high << 32) | offset_low;
955 if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
960 read( fd, ret, size );
961 lseek( fd, pos, SEEK_SET ); /* Restore the file pointer */
962 mprotect( ret, size, prot ); /* Set the right protection */
967 /***********************************************************************
968 * VirtualAlloc (KERNEL32.@)
969 * Reserves or commits a region of pages in virtual address space
972 * Base address of allocated region of pages
975 LPVOID WINAPI VirtualAlloc(
976 LPVOID addr, /* [in] Address of region to reserve or commit */
977 DWORD size, /* [in] Size of region */
978 DWORD type, /* [in] Type of allocation */
979 DWORD protect)/* [in] Type of access protection */
985 TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
987 /* Round parameters to a page boundary */
989 if (size > 0x7fc00000) /* 2Gb - 4Mb */
991 SetLastError( ERROR_OUTOFMEMORY );
996 if (type & MEM_RESERVE) /* Round down to 64k boundary */
997 base = ROUND_ADDR( addr, granularity_mask );
999 base = ROUND_ADDR( addr, page_mask );
1000 size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1001 if ((base <= (char *)granularity_mask) || (base + size < base))
1003 /* disallow low 64k and wrap-around */
1004 SetLastError( ERROR_INVALID_PARAMETER );
1011 size = (size + page_mask) & ~page_mask;
1014 if (type & MEM_TOP_DOWN) {
1015 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
1016 * Is there _ANY_ way to do it with UNIX mmap()?
1018 WARN("MEM_TOP_DOWN ignored\n");
1019 type &= ~MEM_TOP_DOWN;
1021 /* Compute the alloc type flags */
1023 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
1024 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
1026 ERR("called with wrong alloc type flags (%08lx) !\n", type);
1027 SetLastError( ERROR_INVALID_PARAMETER );
1030 if (type & (MEM_COMMIT | MEM_SYSTEM))
1031 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
1034 /* Reserve the memory */
1036 if ((type & MEM_RESERVE) || !base)
1038 if (type & MEM_SYSTEM)
1040 if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
1042 SetLastError( ERROR_OUTOFMEMORY );
1045 return (LPVOID)base;
1047 ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
1048 if (ptr == (void *)-1) return NULL;
1050 if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
1052 munmap( ptr, size );
1053 SetLastError( ERROR_OUTOFMEMORY );
1059 /* Commit the pages */
1061 if (!(view = VIRTUAL_FindView( base )) ||
1062 (base + size > (char *)view->base + view->size))
1064 SetLastError( ERROR_INVALID_ADDRESS );
1068 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
1069 return (LPVOID)base;
1073 /***********************************************************************
1074 * VirtualAllocEx (KERNEL32.@)
1076 * Seems to be just as VirtualAlloc, but with process handle.
1078 LPVOID WINAPI VirtualAllocEx(
1079 HANDLE hProcess, /* [in] Handle of process to do mem operation */
1080 LPVOID addr, /* [in] Address of region to reserve or commit */
1081 DWORD size, /* [in] Size of region */
1082 DWORD type, /* [in] Type of allocation */
1083 DWORD protect /* [in] Type of access protection */
1085 if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
1086 return VirtualAlloc( addr, size, type, protect );
1087 ERR("Unsupported on other process\n");
1092 /***********************************************************************
1093 * VirtualFree (KERNEL32.@)
1094 * Release or decommits a region of pages in virtual address space.
1100 BOOL WINAPI VirtualFree(
1101 LPVOID addr, /* [in] Address of region of committed pages */
1102 DWORD size, /* [in] Size of region */
1103 DWORD type /* [in] Type of operation */
1108 TRACE("%p %08lx %lx\n", addr, size, type );
1110 /* Fix the parameters */
1112 size = ROUND_SIZE( addr, size );
1113 base = ROUND_ADDR( addr, page_mask );
1115 if (!(view = VIRTUAL_FindView( base )) ||
1116 (base + size > (char *)view->base + view->size) ||
1117 !(view->flags & VFLAG_VALLOC))
1119 SetLastError( ERROR_INVALID_PARAMETER );
1123 /* Check the type */
1125 if (type & MEM_SYSTEM)
1127 view->flags |= VFLAG_SYSTEM;
1128 type &= ~MEM_SYSTEM;
1131 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
1133 ERR("called with wrong free type flags (%08lx) !\n", type);
1134 SetLastError( ERROR_INVALID_PARAMETER );
1138 /* Free the pages */
1140 if (type == MEM_RELEASE)
1142 if (size || (base != view->base))
1144 SetLastError( ERROR_INVALID_PARAMETER );
1147 VIRTUAL_DeleteView( view );
1151 /* Decommit the pages by remapping zero-pages instead */
1153 if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
1154 ERR( "Could not remap pages, expect trouble\n" );
1155 return VIRTUAL_SetProt( view, base, size, 0 );
1159 /***********************************************************************
1160 * VirtualLock (KERNEL32.@)
1161 * Locks the specified region of virtual address space
1164 * Always returns TRUE
1170 BOOL WINAPI VirtualLock(
1171 LPVOID addr, /* [in] Address of first byte of range to lock */
1172 DWORD size /* [in] Number of bytes in range to lock */
1178 /***********************************************************************
1179 * VirtualUnlock (KERNEL32.@)
1180 * Unlocks a range of pages in the virtual address space
1183 * Always returns TRUE
1189 BOOL WINAPI VirtualUnlock(
1190 LPVOID addr, /* [in] Address of first byte of range */
1191 DWORD size /* [in] Number of bytes in range */
1197 /***********************************************************************
1198 * VirtualProtect (KERNEL32.@)
1199 * Changes the access protection on a region of committed pages
1205 BOOL WINAPI VirtualProtect(
1206 LPVOID addr, /* [in] Address of region of committed pages */
1207 DWORD size, /* [in] Size of region */
1208 DWORD new_prot, /* [in] Desired access protection */
1209 LPDWORD old_prot /* [out] Address of variable to get old protection */
1217 TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1219 /* Fix the parameters */
1221 size = ROUND_SIZE( addr, size );
1222 base = ROUND_ADDR( addr, page_mask );
1224 if (!(view = VIRTUAL_FindView( base )) ||
1225 (base + size > (char *)view->base + view->size))
1227 SetLastError( ERROR_INVALID_PARAMETER );
1231 /* Make sure all the pages are committed */
1233 p = view->prot + ((base - (char *)view->base) >> page_shift);
1234 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1235 for (i = size >> page_shift; i; i--, p++)
1237 if (!(*p & VPROT_COMMITTED))
1239 SetLastError( ERROR_INVALID_PARAMETER );
1244 if (old_prot) *old_prot = prot;
1245 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1246 return VIRTUAL_SetProt( view, base, size, vprot );
1250 /***********************************************************************
1251 * VirtualProtectEx (KERNEL32.@)
1252 * Changes the access protection on a region of committed pages in the
1253 * virtual address space of a specified process
1259 BOOL WINAPI VirtualProtectEx(
1260 HANDLE handle, /* [in] Handle of process */
1261 LPVOID addr, /* [in] Address of region of committed pages */
1262 DWORD size, /* [in] Size of region */
1263 DWORD new_prot, /* [in] Desired access protection */
1264 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1266 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1267 return VirtualProtect( addr, size, new_prot, old_prot );
1268 ERR("Unsupported on other process\n");
1273 /***********************************************************************
1274 * VirtualQuery (KERNEL32.@)
1275 * Provides info about a range of pages in virtual address space
1278 * Number of bytes returned in information buffer
1279 * or 0 if addr is >= 0xc0000000 (kernel space).
1281 DWORD WINAPI VirtualQuery(
1282 LPCVOID addr, /* [in] Address of region */
1283 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1284 DWORD len /* [in] Size of buffer */
1287 char *base, *alloc_base = 0;
1290 if (addr >= (void*)0xc0000000) return 0;
1292 base = ROUND_ADDR( addr, page_mask );
1294 /* Find the view containing the address */
1296 EnterCriticalSection(&csVirtual);
1297 view = VIRTUAL_FirstView;
1302 size = (char *)0xffff0000 - alloc_base;
1305 if ((char *)view->base > base)
1307 size = (char *)view->base - alloc_base;
1311 if ((char *)view->base + view->size > base)
1313 alloc_base = view->base;
1317 alloc_base = (char *)view->base + view->size;
1320 LeaveCriticalSection(&csVirtual);
1322 /* Fill the info structure */
1326 info->State = MEM_FREE;
1328 info->AllocationProtect = 0;
1333 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1334 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1335 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1336 if (view->prot[size >> page_shift] != vprot) break;
1337 info->AllocationProtect = view->protect;
1338 info->Type = MEM_PRIVATE; /* FIXME */
1341 info->BaseAddress = (LPVOID)base;
1342 info->AllocationBase = (LPVOID)alloc_base;
1343 info->RegionSize = size - (base - alloc_base);
1344 return sizeof(*info);
1348 /***********************************************************************
1349 * VirtualQueryEx (KERNEL32.@)
1350 * Provides info about a range of pages in virtual address space of a
1354 * Number of bytes returned in information buffer
1356 DWORD WINAPI VirtualQueryEx(
1357 HANDLE handle, /* [in] Handle of process */
1358 LPCVOID addr, /* [in] Address of region */
1359 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1360 DWORD len /* [in] Size of buffer */ )
1362 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1363 return VirtualQuery( addr, info, len );
1364 ERR("Unsupported on other process\n");
1369 /***********************************************************************
1370 * IsBadReadPtr (KERNEL32.@)
1373 * FALSE: Process has read access to entire block
1376 BOOL WINAPI IsBadReadPtr(
1377 LPCVOID ptr, /* [in] Address of memory block */
1378 UINT size ) /* [in] Size of block */
1380 if (!size) return FALSE; /* handle 0 size case w/o reference */
1383 volatile const char *p = ptr;
1387 while (count > page_size)
1394 dummy = p[count - 1];
1396 __EXCEPT(page_fault) { return TRUE; }
1402 /***********************************************************************
1403 * IsBadWritePtr (KERNEL32.@)
1406 * FALSE: Process has write access to entire block
1409 BOOL WINAPI IsBadWritePtr(
1410 LPVOID ptr, /* [in] Address of memory block */
1411 UINT size ) /* [in] Size of block in bytes */
1413 if (!size) return FALSE; /* handle 0 size case w/o reference */
1416 volatile char *p = ptr;
1419 while (count > page_size)
1428 __EXCEPT(page_fault) { return TRUE; }
1434 /***********************************************************************
1435 * IsBadHugeReadPtr (KERNEL32.@)
1437 * FALSE: Process has read access to entire block
1440 BOOL WINAPI IsBadHugeReadPtr(
1441 LPCVOID ptr, /* [in] Address of memory block */
1442 UINT size /* [in] Size of block */
1444 return IsBadReadPtr( ptr, size );
1448 /***********************************************************************
1449 * IsBadHugeWritePtr (KERNEL32.@)
1451 * FALSE: Process has write access to entire block
1454 BOOL WINAPI IsBadHugeWritePtr(
1455 LPVOID ptr, /* [in] Address of memory block */
1456 UINT size /* [in] Size of block */
1458 return IsBadWritePtr( ptr, size );
1462 /***********************************************************************
1463 * IsBadCodePtr (KERNEL32.@)
1466 * FALSE: Process has read access to specified memory
1469 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1471 return IsBadReadPtr( ptr, 1 );
1475 /***********************************************************************
1476 * IsBadStringPtrA (KERNEL32.@)
1479 * FALSE: Read access to all bytes in string
1482 BOOL WINAPI IsBadStringPtrA(
1483 LPCSTR str, /* [in] Address of string */
1484 UINT max ) /* [in] Maximum size of string */
1488 volatile const char *p = str;
1489 while (p != str + max) if (!*p++) break;
1491 __EXCEPT(page_fault) { return TRUE; }
1497 /***********************************************************************
1498 * IsBadStringPtrW (KERNEL32.@)
1499 * See IsBadStringPtrA
1501 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1505 volatile const WCHAR *p = str;
1506 while (p != str + max) if (!*p++) break;
1508 __EXCEPT(page_fault) { return TRUE; }
1514 /***********************************************************************
1515 * CreateFileMappingA (KERNEL32.@)
1516 * Creates a named or unnamed file-mapping object for the specified file
1520 * 0: Mapping object does not exist
1523 HANDLE WINAPI CreateFileMappingA(
1524 HANDLE hFile, /* [in] Handle of file to map */
1525 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1526 DWORD protect, /* [in] Protection for mapping object */
1527 DWORD size_high, /* [in] High-order 32 bits of object size */
1528 DWORD size_low, /* [in] Low-order 32 bits of object size */
1529 LPCSTR name /* [in] Name of file-mapping object */ )
1531 WCHAR buffer[MAX_PATH];
1533 if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
1535 if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1537 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1540 return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
1544 /***********************************************************************
1545 * CreateFileMappingW (KERNEL32.@)
1546 * See CreateFileMappingA
1548 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1549 DWORD protect, DWORD size_high,
1550 DWORD size_low, LPCWSTR name )
1554 DWORD len = name ? strlenW(name) : 0;
1556 /* Check parameters */
1558 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1559 hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1563 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1567 vprot = VIRTUAL_GetProt( protect );
1568 if (protect & SEC_RESERVE)
1570 if (hFile != INVALID_HANDLE_VALUE)
1572 SetLastError( ERROR_INVALID_PARAMETER );
1576 else vprot |= VPROT_COMMITTED;
1577 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1578 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1580 /* Create the server object */
1582 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1583 SERVER_START_REQ( create_mapping )
1585 req->file_handle = hFile;
1586 req->size_high = size_high;
1587 req->size_low = size_low;
1588 req->protect = vprot;
1589 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1590 wine_server_add_data( req, name, len * sizeof(WCHAR) );
1592 wine_server_call_err( req );
1593 ret = reply->handle;
1600 /***********************************************************************
1601 * OpenFileMappingA (KERNEL32.@)
1602 * Opens a named file-mapping object.
1608 HANDLE WINAPI OpenFileMappingA(
1609 DWORD access, /* [in] Access mode */
1610 BOOL inherit, /* [in] Inherit flag */
1611 LPCSTR name ) /* [in] Name of file-mapping object */
1613 WCHAR buffer[MAX_PATH];
1615 if (!name) return OpenFileMappingW( access, inherit, NULL );
1617 if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
1619 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1622 return OpenFileMappingW( access, inherit, buffer );
1626 /***********************************************************************
1627 * OpenFileMappingW (KERNEL32.@)
1628 * See OpenFileMappingA
1630 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1633 DWORD len = name ? strlenW(name) : 0;
1634 if (len >= MAX_PATH)
1636 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1639 SERVER_START_REQ( open_mapping )
1641 req->access = access;
1642 req->inherit = inherit;
1643 wine_server_add_data( req, name, len * sizeof(WCHAR) );
1644 wine_server_call_err( req );
1645 ret = reply->handle;
1652 /***********************************************************************
1653 * MapViewOfFile (KERNEL32.@)
1654 * Maps a view of a file into the address space
1657 * Starting address of mapped view
1660 LPVOID WINAPI MapViewOfFile(
1661 HANDLE mapping, /* [in] File-mapping object to map */
1662 DWORD access, /* [in] Access mode */
1663 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1664 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1665 DWORD count /* [in] Number of bytes to map */
1667 return MapViewOfFileEx( mapping, access, offset_high,
1668 offset_low, count, NULL );
1672 /***********************************************************************
1673 * MapViewOfFileEx (KERNEL32.@)
1674 * Maps a view of a file into the address space
1677 * Starting address of mapped view
1680 LPVOID WINAPI MapViewOfFileEx(
1681 HANDLE handle, /* [in] File-mapping object to map */
1682 DWORD access, /* [in] Access mode */
1683 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1684 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1685 DWORD count, /* [in] Number of bytes to map */
1686 LPVOID addr /* [in] Suggested starting address for mapped view */
1690 int flags = MAP_PRIVATE;
1691 int unix_handle = -1;
1693 void *base, *ptr = (void *)-1, *ret;
1694 DWORD size_low, size_high, header_size, shared_size;
1698 /* Check parameters */
1700 if ((offset_low & granularity_mask) ||
1701 (addr && ((UINT_PTR)addr & granularity_mask)))
1703 SetLastError( ERROR_INVALID_PARAMETER );
1707 SERVER_START_REQ( get_mapping_info )
1709 req->handle = handle;
1710 res = wine_server_call_err( req );
1711 prot = reply->protect;
1713 size_low = reply->size_low;
1714 size_high = reply->size_high;
1715 header_size = reply->header_size;
1716 shared_file = reply->shared_file;
1717 shared_size = reply->shared_size;
1718 removable = (reply->drive_type == DRIVE_REMOVABLE ||
1719 reply->drive_type == DRIVE_CDROM);
1722 if (res) goto error;
1724 if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1726 if (prot & VPROT_IMAGE)
1727 return map_image( handle, unix_handle, base, size_low, header_size,
1728 shared_file, shared_size, removable );
1732 ERR("Sizes larger than 4Gb not supported\n");
1734 if ((offset_low >= size_low) ||
1735 (count > size_low - offset_low))
1737 SetLastError( ERROR_INVALID_PARAMETER );
1740 if (count) size = ROUND_SIZE( offset_low, count );
1741 else size = size_low - offset_low;
1745 case FILE_MAP_ALL_ACCESS:
1746 case FILE_MAP_WRITE:
1747 case FILE_MAP_WRITE | FILE_MAP_READ:
1748 if (!(prot & VPROT_WRITE))
1750 SetLastError( ERROR_INVALID_PARAMETER );
1757 case FILE_MAP_COPY | FILE_MAP_READ:
1758 if (prot & VPROT_READ) break;
1761 SetLastError( ERROR_INVALID_PARAMETER );
1765 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1766 * which has a view of this mapping commits some pages, they will
1767 * appear commited in all other processes, which have the same
1768 * view created. Since we don`t support this yet, we create the
1769 * whole mapping commited.
1771 prot |= VPROT_COMMITTED;
1773 /* Reserve a properly aligned area */
1775 if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1779 TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1781 ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1782 VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1785 ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1788 if (removable) handle = 0; /* don't keep handle open on removable media */
1790 if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1792 SetLastError( ERROR_OUTOFMEMORY );
1795 if (unix_handle != -1) close( unix_handle );
1799 if (unix_handle != -1) close( unix_handle );
1800 if (ptr != (void *)-1) munmap( ptr, size );
1805 /***********************************************************************
1806 * FlushViewOfFile (KERNEL32.@)
1807 * Writes to the disk a byte range within a mapped view of a file
1813 BOOL WINAPI FlushViewOfFile(
1814 LPCVOID base, /* [in] Start address of byte range to flush */
1815 DWORD cbFlush /* [in] Number of bytes in range */
1818 void *addr = ROUND_ADDR( base, page_mask );
1820 TRACE("FlushViewOfFile at %p for %ld bytes\n",
1823 if (!(view = VIRTUAL_FindView( addr )))
1825 SetLastError( ERROR_INVALID_PARAMETER );
1828 if (!cbFlush) cbFlush = view->size;
1829 if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1830 SetLastError( ERROR_INVALID_PARAMETER );
1835 /***********************************************************************
1836 * UnmapViewOfFile (KERNEL32.@)
1837 * Unmaps a mapped view of a file.
1840 * Should addr be an LPCVOID?
1846 BOOL WINAPI UnmapViewOfFile(
1847 LPVOID addr /* [in] Address where mapped view begins */
1850 void *base = ROUND_ADDR( addr, page_mask );
1851 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1853 SetLastError( ERROR_INVALID_PARAMETER );
1856 VIRTUAL_DeleteView( view );