2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
12 #ifdef HAVE_SYS_ERRNO_H
13 #include <sys/errno.h>
20 #include <sys/types.h>
21 #ifdef HAVE_SYS_MMAN_H
26 #include "wine/exception.h"
27 #include "wine/unicode.h"
28 #include "wine/library.h"
32 #include "wine/server.h"
33 #include "debugtools.h"
35 DEFAULT_DEBUG_CHANNEL(virtual);
36 DECLARE_DEBUG_CHANNEL(module);
45 struct _FV *next; /* Next view */
46 struct _FV *prev; /* Prev view */
47 void *base; /* Base address */
48 UINT size; /* Size in bytes */
49 UINT flags; /* Allocation flags */
50 HANDLE mapping; /* Handle to the file mapping */
51 HANDLERPROC handlerProc; /* Fault handler */
52 LPVOID handlerArg; /* Fault handler argument */
53 BYTE protect; /* Protection for all pages at allocation time */
54 BYTE prot[1]; /* Protection byte for each page */
58 #define VFLAG_SYSTEM 0x01
59 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
61 /* Conversion from VPROT_* to Win32 flags */
62 static const BYTE VIRTUAL_Win32Flags[16] =
64 PAGE_NOACCESS, /* 0 */
65 PAGE_READONLY, /* READ */
66 PAGE_READWRITE, /* WRITE */
67 PAGE_READWRITE, /* READ | WRITE */
68 PAGE_EXECUTE, /* EXEC */
69 PAGE_EXECUTE_READ, /* READ | EXEC */
70 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
71 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
72 PAGE_WRITECOPY, /* WRITECOPY */
73 PAGE_WRITECOPY, /* READ | WRITECOPY */
74 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
75 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
76 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
77 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
78 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
79 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
83 static FILE_VIEW *VIRTUAL_FirstView;
84 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
87 /* These are always the same on an i386, and it will be faster this way */
88 # define page_mask 0xfff
89 # define page_shift 12
90 # define page_size 0x1000
92 static UINT page_shift;
93 static UINT page_mask;
94 static UINT page_size;
96 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
98 #define ROUND_ADDR(addr,mask) \
99 ((void *)((UINT_PTR)(addr) & ~(mask)))
101 #define ROUND_SIZE(addr,size) \
102 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
105 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
107 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
108 DWORD offset_high, int prot, int flags, BOOL *removable );
110 /* filter for page-fault exceptions */
111 static WINE_EXCEPTION_FILTER(page_fault)
113 if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
114 return EXCEPTION_EXECUTE_HANDLER;
115 return EXCEPTION_CONTINUE_SEARCH;
118 /***********************************************************************
121 static const char *VIRTUAL_GetProtStr( BYTE prot )
123 static char buffer[6];
124 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
125 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
126 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
127 buffer[3] = (prot & VPROT_WRITE) ?
128 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
129 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
135 /***********************************************************************
138 static void VIRTUAL_DumpView( FILE_VIEW *view )
141 char *addr = view->base;
142 BYTE prot = view->prot[0];
144 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
145 if (view->flags & VFLAG_SYSTEM)
146 DPRINTF( " (system)\n" );
147 else if (view->flags & VFLAG_VALLOC)
148 DPRINTF( " (valloc)\n" );
149 else if (view->mapping)
150 DPRINTF( " %d\n", view->mapping );
152 DPRINTF( " (anonymous)\n");
154 for (count = i = 1; i < view->size >> page_shift; i++, count++)
156 if (view->prot[i] == prot) continue;
157 DPRINTF( " %p - %p %s\n",
158 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
159 addr += (count << page_shift);
160 prot = view->prot[i];
164 DPRINTF( " %p - %p %s\n",
165 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
169 /***********************************************************************
172 void VIRTUAL_Dump(void)
175 DPRINTF( "\nDump of all virtual memory views:\n\n" );
176 EnterCriticalSection(&csVirtual);
177 view = VIRTUAL_FirstView;
180 VIRTUAL_DumpView( view );
183 LeaveCriticalSection(&csVirtual);
187 /***********************************************************************
190 * Find the view containing a given address.
196 static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
200 EnterCriticalSection(&csVirtual);
201 view = VIRTUAL_FirstView;
204 if (view->base > addr)
209 if (view->base + view->size > addr) break;
212 LeaveCriticalSection(&csVirtual);
217 /***********************************************************************
220 * Create a new view and add it in the linked list.
222 static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
223 BYTE vprot, HANDLE mapping )
225 FILE_VIEW *view, *prev;
227 /* Create the view structure */
229 assert( !((unsigned int)base & page_mask) );
230 assert( !(size & page_mask) );
232 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
234 view->size = size << page_shift;
236 view->mapping = mapping;
237 view->protect = vprot;
238 view->handlerProc = NULL;
239 memset( view->prot, vprot, size );
241 /* Duplicate the mapping handle */
244 !DuplicateHandle( GetCurrentProcess(), view->mapping,
245 GetCurrentProcess(), &view->mapping,
246 0, FALSE, DUPLICATE_SAME_ACCESS ))
252 /* Insert it in the linked list */
254 EnterCriticalSection(&csVirtual);
255 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
257 view->next = VIRTUAL_FirstView;
259 if (view->next) view->next->prev = view;
260 VIRTUAL_FirstView = view;
264 prev = VIRTUAL_FirstView;
265 while (prev->next && (prev->next->base < base)) prev = prev->next;
266 view->next = prev->next;
268 if (view->next) view->next->prev = view;
271 LeaveCriticalSection(&csVirtual);
272 VIRTUAL_DEBUG_DUMP_VIEW( view );
277 /***********************************************************************
284 static void VIRTUAL_DeleteView(
285 FILE_VIEW *view /* [in] View */
287 if (!(view->flags & VFLAG_SYSTEM))
288 munmap( (void *)view->base, view->size );
289 EnterCriticalSection(&csVirtual);
290 if (view->next) view->next->prev = view->prev;
291 if (view->prev) view->prev->next = view->next;
292 else VIRTUAL_FirstView = view->next;
293 LeaveCriticalSection(&csVirtual);
294 if (view->mapping) NtClose( view->mapping );
299 /***********************************************************************
300 * VIRTUAL_GetUnixProt
302 * Convert page protections to protection for mmap/mprotect.
304 static int VIRTUAL_GetUnixProt( BYTE vprot )
307 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
309 if (vprot & VPROT_READ) prot |= PROT_READ;
310 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
311 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
312 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
318 /***********************************************************************
319 * VIRTUAL_GetWin32Prot
321 * Convert page protections to Win32 flags.
326 static void VIRTUAL_GetWin32Prot(
327 BYTE vprot, /* [in] Page protection flags */
328 DWORD *protect, /* [out] Location to store Win32 protection flags */
329 DWORD *state /* [out] Location to store mem state flag */
332 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
333 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
334 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
336 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
339 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
343 /***********************************************************************
346 * Build page protections from Win32 flags.
349 * Value of page protection flags
351 static BYTE VIRTUAL_GetProt(
352 DWORD protect /* [in] Win32 protection flags */
356 switch(protect & 0xff)
362 vprot = VPROT_READ | VPROT_WRITE;
365 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
366 * that the hFile must have been opened with GENERIC_READ and
367 * GENERIC_WRITE access. This is WRONG as tests show that you
368 * only need GENERIC_READ access (at least for Win9x,
369 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
370 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
372 vprot = VPROT_READ | VPROT_WRITECOPY;
377 case PAGE_EXECUTE_READ:
378 vprot = VPROT_EXEC | VPROT_READ;
380 case PAGE_EXECUTE_READWRITE:
381 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
383 case PAGE_EXECUTE_WRITECOPY:
384 /* See comment for PAGE_WRITECOPY above */
385 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
392 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
393 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
398 /***********************************************************************
401 * Change the protection of a range of pages.
407 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
408 void *base, /* [in] Starting address */
409 UINT size, /* [in] Size in bytes */
410 BYTE vprot ) /* [in] Protections to use */
413 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
415 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
416 return FALSE; /* FIXME: last error */
418 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
419 vprot, size >> page_shift );
420 VIRTUAL_DEBUG_DUMP_VIEW( view );
425 /***********************************************************************
428 * Create an anonymous mapping aligned to the allocation granularity.
430 static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
433 unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
435 if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
437 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
438 * Platform Differences":
439 * Windows NT: ERROR_INVALID_PARAMETER
440 * Windows 95: ERROR_INVALID_ADDRESS.
442 if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
445 if (GetVersion() & 0x80000000) /* win95 */
446 SetLastError( ERROR_INVALID_ADDRESS );
448 SetLastError( ERROR_INVALID_PARAMETER );
455 /* Release the extra memory while keeping the range
456 * starting on the granularity boundary. */
457 if ((unsigned int)ptr & granularity_mask)
459 unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
460 munmap( ptr, extra );
461 ptr = (char *)ptr + extra;
464 if (view_size > size)
465 munmap( (char *)ptr + size, view_size - size );
467 else if (ptr != base)
469 /* We couldn't get the address we wanted */
470 munmap( ptr, view_size );
471 SetLastError( ERROR_INVALID_ADDRESS );
478 /***********************************************************************
481 * Map an executable (PE format) image into memory.
483 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
484 DWORD header_size, HANDLE shared_file, DWORD shared_size,
487 IMAGE_DOS_HEADER *dos;
488 IMAGE_NT_HEADERS *nt;
489 IMAGE_SECTION_HEADER *sec;
491 DWORD err = GetLastError();
496 SetLastError( ERROR_BAD_EXE_FORMAT ); /* generic error */
498 /* zero-map the whole range */
500 if ((ptr = wine_anon_mmap( base, total_size,
501 PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
503 ptr = wine_anon_mmap( NULL, total_size,
504 PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
505 if (ptr == (char *)-1)
507 ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
511 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
515 if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ | PROT_WRITE,
516 MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
517 dos = (IMAGE_DOS_HEADER *)ptr;
518 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
519 if ((char *)(nt + 1) > ptr + header_size) goto error;
521 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
522 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
524 /* check the architecture */
526 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
528 MESSAGE("Trying to load PE image for unsupported architecture (");
529 switch (nt->FileHeader.Machine)
531 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
532 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
533 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
534 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
535 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
536 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
537 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
538 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
544 /* retrieve the shared sections file */
548 if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
549 CloseHandle( shared_file ); /* we no longer need it */
553 /* map all the sections */
555 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
559 /* a few sanity checks */
560 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
561 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
563 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
564 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
568 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
569 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
571 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
572 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
573 sec->Name, ptr + sec->VirtualAddress,
574 sec->PointerToRawData, pos, sec->SizeOfRawData,
575 size, sec->Characteristics );
576 if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
577 pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
578 MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
580 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
587 if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
588 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
590 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
591 sec->Name, ptr + sec->VirtualAddress,
592 sec->PointerToRawData, sec->SizeOfRawData,
593 sec->Characteristics );
595 /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
596 * fall back to read(), so we don't need to check anything here.
598 if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
599 sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
600 MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
602 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
606 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
608 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
609 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
610 TRACE_(module)("clearing %p - %p\n",
611 ptr + sec->VirtualAddress + sec->SizeOfRawData,
612 ptr + sec->VirtualAddress + end );
613 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
614 end - sec->SizeOfRawData );
618 if (removable) hmapping = 0; /* don't keep handle open on removable media */
619 if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
620 VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
623 SetLastError( ERROR_OUTOFMEMORY );
627 SetLastError( err ); /* restore last error */
629 if (shared_fd != -1) close( shared_fd );
633 if (ptr != (char *)-1) munmap( ptr, total_size );
635 if (shared_fd != -1) close( shared_fd );
636 if (shared_file) CloseHandle( shared_file );
641 /***********************************************************************
645 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
647 page_size = getpagesize();
648 page_mask = page_size - 1;
649 /* Make sure we have a power of 2 */
650 assert( !(page_size & page_mask) );
652 while ((1 << page_shift) != page_size) page_shift++;
654 #endif /* page_mask */
657 /***********************************************************************
658 * VIRTUAL_SetFaultHandler
660 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
664 if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
665 view->handlerProc = proc;
666 view->handlerArg = arg;
670 /***********************************************************************
671 * VIRTUAL_HandleFault
673 DWORD VIRTUAL_HandleFault( LPCVOID addr )
675 FILE_VIEW *view = VIRTUAL_FindView( addr );
676 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
680 if (view->handlerProc)
682 if (view->handlerProc(view->handlerArg, addr)) ret = 0; /* handled */
686 BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
687 void *page = (void *)((UINT_PTR)addr & ~page_mask);
688 char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
689 if (vprot & VPROT_GUARD)
691 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
692 ret = STATUS_GUARD_PAGE_VIOLATION;
694 /* is it inside the stack guard pages? */
695 if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
696 ret = STATUS_STACK_OVERFLOW;
704 /***********************************************************************
707 * Linux kernels before 2.4.x can support non page-aligned offsets, as
708 * long as the offset is aligned to the filesystem block size. This is
709 * a big performance gain so we want to take advantage of it.
711 * However, when we use 64-bit file support this doesn't work because
712 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
713 * in that it rounds unaligned offsets down to a page boundary. For
714 * these reasons we do a direct system call here.
716 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
717 unsigned int flags, int fd, unsigned int offset_low,
718 unsigned int offset_high )
720 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
721 if (!offset_high && (offset_low & page_mask))
724 __asm__ __volatile__("push %%ebx\n\t"
729 : "0" (90), /* SYS_mmap */
731 if (ret < 0 && ret > -4096)
739 return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
743 /***********************************************************************
746 * Wrapper for mmap() that handles anonymous mappings portably,
747 * and falls back to read if mmap of a file fails.
749 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
750 DWORD offset_low, DWORD offset_high,
751 int prot, int flags, BOOL *removable )
756 BOOL is_shared_write = FALSE;
758 if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
760 if (prot & PROT_WRITE)
763 if (flags & MAP_SHARED) is_shared_write = TRUE;
766 if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
770 if (removable && *removable)
772 /* if on removable media, try using read instead of mmap */
773 if (!is_shared_write) goto fake_mmap;
777 if ((ret = unaligned_mmap( start, size, prot, flags, fd,
778 offset_low, offset_high )) != (LPVOID)-1) return ret;
780 /* mmap() failed; if this is because the file offset is not */
781 /* page-aligned (EINVAL), or because the underlying filesystem */
782 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
784 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
785 if (is_shared_write) return ret; /* we cannot fake shared write mappings */
788 /* Reserve the memory with an anonymous mmap */
789 ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
790 if (ret == (LPVOID)-1) return ret;
791 /* Now read in the file */
792 offset = ((off_t)offset_high << 32) | offset_low;
793 if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
798 read( fd, ret, size );
799 lseek( fd, pos, SEEK_SET ); /* Restore the file pointer */
800 mprotect( ret, size, prot ); /* Set the right protection */
805 /***********************************************************************
806 * VirtualAlloc (KERNEL32.@)
807 * Reserves or commits a region of pages in virtual address space
810 * Base address of allocated region of pages
813 LPVOID WINAPI VirtualAlloc(
814 LPVOID addr, /* [in] Address of region to reserve or commit */
815 DWORD size, /* [in] Size of region */
816 DWORD type, /* [in] Type of allocation */
817 DWORD protect)/* [in] Type of access protection */
823 TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
825 /* Round parameters to a page boundary */
827 if (size > 0x7fc00000) /* 2Gb - 4Mb */
829 SetLastError( ERROR_OUTOFMEMORY );
834 if (type & MEM_RESERVE) /* Round down to 64k boundary */
835 base = ROUND_ADDR( addr, granularity_mask );
837 base = ROUND_ADDR( addr, page_mask );
838 size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
839 if ((base <= (char *)granularity_mask) || (base + size < base))
841 /* disallow low 64k and wrap-around */
842 SetLastError( ERROR_INVALID_PARAMETER );
849 size = (size + page_mask) & ~page_mask;
852 if (type & MEM_TOP_DOWN) {
853 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
854 * Is there _ANY_ way to do it with UNIX mmap()?
856 WARN("MEM_TOP_DOWN ignored\n");
857 type &= ~MEM_TOP_DOWN;
859 /* Compute the alloc type flags */
861 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
862 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
864 ERR("called with wrong alloc type flags (%08lx) !\n", type);
865 SetLastError( ERROR_INVALID_PARAMETER );
868 if (type & (MEM_COMMIT | MEM_SYSTEM))
869 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
872 /* Reserve the memory */
874 if ((type & MEM_RESERVE) || !base)
876 if (type & MEM_SYSTEM)
878 if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
880 SetLastError( ERROR_OUTOFMEMORY );
885 ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
886 if (ptr == (void *)-1) return NULL;
888 if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
891 SetLastError( ERROR_OUTOFMEMORY );
897 /* Commit the pages */
899 if (!(view = VIRTUAL_FindView( base )) ||
900 (base + size > (char *)view->base + view->size))
902 SetLastError( ERROR_INVALID_ADDRESS );
906 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
911 /***********************************************************************
912 * VirtualAllocEx (KERNEL32.@)
914 * Seems to be just as VirtualAlloc, but with process handle.
916 LPVOID WINAPI VirtualAllocEx(
917 HANDLE hProcess, /* [in] Handle of process to do mem operation */
918 LPVOID addr, /* [in] Address of region to reserve or commit */
919 DWORD size, /* [in] Size of region */
920 DWORD type, /* [in] Type of allocation */
921 DWORD protect /* [in] Type of access protection */
923 if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
924 return VirtualAlloc( addr, size, type, protect );
925 ERR("Unsupported on other process\n");
930 /***********************************************************************
931 * VirtualFree (KERNEL32.@)
932 * Release or decommits a region of pages in virtual address space.
938 BOOL WINAPI VirtualFree(
939 LPVOID addr, /* [in] Address of region of committed pages */
940 DWORD size, /* [in] Size of region */
941 DWORD type /* [in] Type of operation */
946 TRACE("%p %08lx %lx\n", addr, size, type );
948 /* Fix the parameters */
950 size = ROUND_SIZE( addr, size );
951 base = ROUND_ADDR( addr, page_mask );
953 if (!(view = VIRTUAL_FindView( base )) ||
954 (base + size > (char *)view->base + view->size) ||
955 !(view->flags & VFLAG_VALLOC))
957 SetLastError( ERROR_INVALID_PARAMETER );
961 /* Compute the protection flags */
963 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
965 ERR("called with wrong free type flags (%08lx) !\n", type);
966 SetLastError( ERROR_INVALID_PARAMETER );
972 if (type == MEM_RELEASE)
974 if (size || (base != view->base))
976 SetLastError( ERROR_INVALID_PARAMETER );
979 VIRTUAL_DeleteView( view );
983 /* Decommit the pages by remapping zero-pages instead */
985 if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
986 ERR( "Could not remap pages, expect trouble\n" );
987 return VIRTUAL_SetProt( view, base, size, 0 );
991 /***********************************************************************
992 * VirtualLock (KERNEL32.@)
993 * Locks the specified region of virtual address space
996 * Always returns TRUE
1002 BOOL WINAPI VirtualLock(
1003 LPVOID addr, /* [in] Address of first byte of range to lock */
1004 DWORD size /* [in] Number of bytes in range to lock */
1010 /***********************************************************************
1011 * VirtualUnlock (KERNEL32.@)
1012 * Unlocks a range of pages in the virtual address space
1015 * Always returns TRUE
1021 BOOL WINAPI VirtualUnlock(
1022 LPVOID addr, /* [in] Address of first byte of range */
1023 DWORD size /* [in] Number of bytes in range */
1029 /***********************************************************************
1030 * VirtualProtect (KERNEL32.@)
1031 * Changes the access protection on a region of committed pages
1037 BOOL WINAPI VirtualProtect(
1038 LPVOID addr, /* [in] Address of region of committed pages */
1039 DWORD size, /* [in] Size of region */
1040 DWORD new_prot, /* [in] Desired access protection */
1041 LPDWORD old_prot /* [out] Address of variable to get old protection */
1049 TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1051 /* Fix the parameters */
1053 size = ROUND_SIZE( addr, size );
1054 base = ROUND_ADDR( addr, page_mask );
1056 if (!(view = VIRTUAL_FindView( base )) ||
1057 (base + size > (char *)view->base + view->size))
1059 SetLastError( ERROR_INVALID_PARAMETER );
1063 /* Make sure all the pages are committed */
1065 p = view->prot + ((base - (char *)view->base) >> page_shift);
1066 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1067 for (i = size >> page_shift; i; i--, p++)
1069 if (!(*p & VPROT_COMMITTED))
1071 SetLastError( ERROR_INVALID_PARAMETER );
1076 if (old_prot) *old_prot = prot;
1077 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1078 return VIRTUAL_SetProt( view, base, size, vprot );
1082 /***********************************************************************
1083 * VirtualProtectEx (KERNEL32.@)
1084 * Changes the access protection on a region of committed pages in the
1085 * virtual address space of a specified process
1091 BOOL WINAPI VirtualProtectEx(
1092 HANDLE handle, /* [in] Handle of process */
1093 LPVOID addr, /* [in] Address of region of committed pages */
1094 DWORD size, /* [in] Size of region */
1095 DWORD new_prot, /* [in] Desired access protection */
1096 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1098 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1099 return VirtualProtect( addr, size, new_prot, old_prot );
1100 ERR("Unsupported on other process\n");
1105 /***********************************************************************
1106 * VirtualQuery (KERNEL32.@)
1107 * Provides info about a range of pages in virtual address space
1110 * Number of bytes returned in information buffer
1111 * or 0 if addr is >= 0xc0000000 (kernel space).
1113 DWORD WINAPI VirtualQuery(
1114 LPCVOID addr, /* [in] Address of region */
1115 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1116 DWORD len /* [in] Size of buffer */
1119 char *base, *alloc_base = 0;
1122 if (addr >= (void*)0xc0000000) return 0;
1124 base = ROUND_ADDR( addr, page_mask );
1126 /* Find the view containing the address */
1128 EnterCriticalSection(&csVirtual);
1129 view = VIRTUAL_FirstView;
1134 size = (char *)0xffff0000 - alloc_base;
1137 if ((char *)view->base > base)
1139 size = (char *)view->base - alloc_base;
1143 if ((char *)view->base + view->size > base)
1145 alloc_base = view->base;
1149 alloc_base = (char *)view->base + view->size;
1152 LeaveCriticalSection(&csVirtual);
1154 /* Fill the info structure */
1158 info->State = MEM_FREE;
1160 info->AllocationProtect = 0;
1165 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1166 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1167 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1168 if (view->prot[size >> page_shift] != vprot) break;
1169 info->AllocationProtect = view->protect;
1170 info->Type = MEM_PRIVATE; /* FIXME */
1173 info->BaseAddress = (LPVOID)base;
1174 info->AllocationBase = (LPVOID)alloc_base;
1175 info->RegionSize = size - (base - alloc_base);
1176 return sizeof(*info);
1180 /***********************************************************************
1181 * VirtualQueryEx (KERNEL32.@)
1182 * Provides info about a range of pages in virtual address space of a
1186 * Number of bytes returned in information buffer
1188 DWORD WINAPI VirtualQueryEx(
1189 HANDLE handle, /* [in] Handle of process */
1190 LPCVOID addr, /* [in] Address of region */
1191 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1192 DWORD len /* [in] Size of buffer */ )
1194 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1195 return VirtualQuery( addr, info, len );
1196 ERR("Unsupported on other process\n");
1201 /***********************************************************************
1202 * IsBadReadPtr (KERNEL32.@)
1205 * FALSE: Process has read access to entire block
1208 BOOL WINAPI IsBadReadPtr(
1209 LPCVOID ptr, /* [in] Address of memory block */
1210 UINT size ) /* [in] Size of block */
1212 if (!size) return FALSE; /* handle 0 size case w/o reference */
1215 volatile const char *p = ptr;
1219 while (count > page_size)
1226 dummy = p[count - 1];
1228 __EXCEPT(page_fault) { return TRUE; }
1234 /***********************************************************************
1235 * IsBadWritePtr (KERNEL32.@)
1238 * FALSE: Process has write access to entire block
1241 BOOL WINAPI IsBadWritePtr(
1242 LPVOID ptr, /* [in] Address of memory block */
1243 UINT size ) /* [in] Size of block in bytes */
1245 if (!size) return FALSE; /* handle 0 size case w/o reference */
1248 volatile char *p = ptr;
1251 while (count > page_size)
1260 __EXCEPT(page_fault) { return TRUE; }
1266 /***********************************************************************
1267 * IsBadHugeReadPtr (KERNEL32.@)
1269 * FALSE: Process has read access to entire block
1272 BOOL WINAPI IsBadHugeReadPtr(
1273 LPCVOID ptr, /* [in] Address of memory block */
1274 UINT size /* [in] Size of block */
1276 return IsBadReadPtr( ptr, size );
1280 /***********************************************************************
1281 * IsBadHugeWritePtr (KERNEL32.@)
1283 * FALSE: Process has write access to entire block
1286 BOOL WINAPI IsBadHugeWritePtr(
1287 LPVOID ptr, /* [in] Address of memory block */
1288 UINT size /* [in] Size of block */
1290 return IsBadWritePtr( ptr, size );
1294 /***********************************************************************
1295 * IsBadCodePtr (KERNEL32.@)
1298 * FALSE: Process has read access to specified memory
1301 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1303 return IsBadReadPtr( ptr, 1 );
1307 /***********************************************************************
1308 * IsBadStringPtrA (KERNEL32.@)
1311 * FALSE: Read access to all bytes in string
1314 BOOL WINAPI IsBadStringPtrA(
1315 LPCSTR str, /* [in] Address of string */
1316 UINT max ) /* [in] Maximum size of string */
1320 volatile const char *p = str;
1321 while (p != str + max) if (!*p++) break;
1323 __EXCEPT(page_fault) { return TRUE; }
1329 /***********************************************************************
1330 * IsBadStringPtrW (KERNEL32.@)
1331 * See IsBadStringPtrA
1333 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1337 volatile const WCHAR *p = str;
1338 while (p != str + max) if (!*p++) break;
1340 __EXCEPT(page_fault) { return TRUE; }
1346 /***********************************************************************
1347 * CreateFileMappingA (KERNEL32.@)
1348 * Creates a named or unnamed file-mapping object for the specified file
1352 * 0: Mapping object does not exist
1355 HANDLE WINAPI CreateFileMappingA(
1356 HANDLE hFile, /* [in] Handle of file to map */
1357 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1358 DWORD protect, /* [in] Protection for mapping object */
1359 DWORD size_high, /* [in] High-order 32 bits of object size */
1360 DWORD size_low, /* [in] Low-order 32 bits of object size */
1361 LPCSTR name /* [in] Name of file-mapping object */ )
1365 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1367 /* Check parameters */
1369 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1370 hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1374 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1377 vprot = VIRTUAL_GetProt( protect );
1378 if (protect & SEC_RESERVE)
1380 if (hFile != INVALID_HANDLE_VALUE)
1382 SetLastError( ERROR_INVALID_PARAMETER );
1386 else vprot |= VPROT_COMMITTED;
1387 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1388 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1390 /* Create the server object */
1392 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1393 SERVER_START_VAR_REQ( create_mapping, len * sizeof(WCHAR) )
1395 req->file_handle = hFile;
1396 req->size_high = size_high;
1397 req->size_low = size_low;
1398 req->protect = vprot;
1399 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1400 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1410 /***********************************************************************
1411 * CreateFileMappingW (KERNEL32.@)
1412 * See CreateFileMappingA
1414 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1415 DWORD protect, DWORD size_high,
1416 DWORD size_low, LPCWSTR name )
1420 DWORD len = name ? strlenW(name) : 0;
1422 /* Check parameters */
1424 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1425 hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1429 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1433 vprot = VIRTUAL_GetProt( protect );
1434 if (protect & SEC_RESERVE)
1436 if (hFile != INVALID_HANDLE_VALUE)
1438 SetLastError( ERROR_INVALID_PARAMETER );
1442 else vprot |= VPROT_COMMITTED;
1443 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1444 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1446 /* Create the server object */
1448 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1449 SERVER_START_VAR_REQ( create_mapping, len * sizeof(WCHAR) )
1451 req->file_handle = hFile;
1452 req->size_high = size_high;
1453 req->size_low = size_low;
1454 req->protect = vprot;
1455 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1456 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1466 /***********************************************************************
1467 * OpenFileMappingA (KERNEL32.@)
1468 * Opens a named file-mapping object.
1474 HANDLE WINAPI OpenFileMappingA(
1475 DWORD access, /* [in] Access mode */
1476 BOOL inherit, /* [in] Inherit flag */
1477 LPCSTR name ) /* [in] Name of file-mapping object */
1480 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1483 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1486 SERVER_START_VAR_REQ( open_mapping, len * sizeof(WCHAR) )
1488 req->access = access;
1489 req->inherit = inherit;
1490 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1499 /***********************************************************************
1500 * OpenFileMappingW (KERNEL32.@)
1501 * See OpenFileMappingA
1503 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1506 DWORD len = name ? strlenW(name) : 0;
1509 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1512 SERVER_START_VAR_REQ( open_mapping, len * sizeof(WCHAR) )
1514 req->access = access;
1515 req->inherit = inherit;
1516 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1525 /***********************************************************************
1526 * MapViewOfFile (KERNEL32.@)
1527 * Maps a view of a file into the address space
1530 * Starting address of mapped view
1533 LPVOID WINAPI MapViewOfFile(
1534 HANDLE mapping, /* [in] File-mapping object to map */
1535 DWORD access, /* [in] Access mode */
1536 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1537 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1538 DWORD count /* [in] Number of bytes to map */
1540 return MapViewOfFileEx( mapping, access, offset_high,
1541 offset_low, count, NULL );
1545 /***********************************************************************
1546 * MapViewOfFileEx (KERNEL32.@)
1547 * Maps a view of a file into the address space
1550 * Starting address of mapped view
1553 LPVOID WINAPI MapViewOfFileEx(
1554 HANDLE handle, /* [in] File-mapping object to map */
1555 DWORD access, /* [in] Access mode */
1556 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1557 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1558 DWORD count, /* [in] Number of bytes to map */
1559 LPVOID addr /* [in] Suggested starting address for mapped view */
1563 int flags = MAP_PRIVATE;
1564 int unix_handle = -1;
1566 void *base, *ptr = (void *)-1, *ret;
1567 DWORD size_low, size_high, header_size, shared_size;
1571 /* Check parameters */
1573 if ((offset_low & granularity_mask) ||
1574 (addr && ((UINT_PTR)addr & granularity_mask)))
1576 SetLastError( ERROR_INVALID_PARAMETER );
1580 SERVER_START_REQ( get_mapping_info )
1582 req->handle = handle;
1583 res = SERVER_CALL_ERR();
1584 prot = req->protect;
1586 size_low = req->size_low;
1587 size_high = req->size_high;
1588 header_size = req->header_size;
1589 shared_file = req->shared_file;
1590 shared_size = req->shared_size;
1591 removable = (req->drive_type == DRIVE_REMOVABLE ||
1592 req->drive_type == DRIVE_CDROM);
1595 if (res) goto error;
1597 if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1599 if (prot & VPROT_IMAGE)
1600 return map_image( handle, unix_handle, base, size_low, header_size,
1601 shared_file, shared_size, removable );
1605 ERR("Sizes larger than 4Gb not supported\n");
1607 if ((offset_low >= size_low) ||
1608 (count > size_low - offset_low))
1610 SetLastError( ERROR_INVALID_PARAMETER );
1613 if (count) size = ROUND_SIZE( offset_low, count );
1614 else size = size_low - offset_low;
1618 case FILE_MAP_ALL_ACCESS:
1619 case FILE_MAP_WRITE:
1620 case FILE_MAP_WRITE | FILE_MAP_READ:
1621 if (!(prot & VPROT_WRITE))
1623 SetLastError( ERROR_INVALID_PARAMETER );
1630 case FILE_MAP_COPY | FILE_MAP_READ:
1631 if (prot & VPROT_READ) break;
1634 SetLastError( ERROR_INVALID_PARAMETER );
1638 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1639 * which has a view of this mapping commits some pages, they will
1640 * appear commited in all other processes, which have the same
1641 * view created. Since we don`t support this yet, we create the
1642 * whole mapping commited.
1644 prot |= VPROT_COMMITTED;
1646 /* Reserve a properly aligned area */
1648 if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
1652 TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1654 ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
1655 VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
1658 ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
1661 if (removable) handle = 0; /* don't keep handle open on removable media */
1663 if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1665 SetLastError( ERROR_OUTOFMEMORY );
1668 if (unix_handle != -1) close( unix_handle );
1672 if (unix_handle != -1) close( unix_handle );
1673 if (ptr != (void *)-1) munmap( ptr, size );
1678 /***********************************************************************
1679 * FlushViewOfFile (KERNEL32.@)
1680 * Writes to the disk a byte range within a mapped view of a file
1686 BOOL WINAPI FlushViewOfFile(
1687 LPCVOID base, /* [in] Start address of byte range to flush */
1688 DWORD cbFlush /* [in] Number of bytes in range */
1691 void *addr = ROUND_ADDR( base, page_mask );
1693 TRACE("FlushViewOfFile at %p for %ld bytes\n",
1696 if (!(view = VIRTUAL_FindView( addr )))
1698 SetLastError( ERROR_INVALID_PARAMETER );
1701 if (!cbFlush) cbFlush = view->size;
1702 if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
1703 SetLastError( ERROR_INVALID_PARAMETER );
1708 /***********************************************************************
1709 * UnmapViewOfFile (KERNEL32.@)
1710 * Unmaps a mapped view of a file.
1713 * Should addr be an LPCVOID?
1719 BOOL WINAPI UnmapViewOfFile(
1720 LPVOID addr /* [in] Address where mapped view begins */
1723 void *base = ROUND_ADDR( addr, page_mask );
1724 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1726 SetLastError( ERROR_INVALID_PARAMETER );
1729 VIRTUAL_DeleteView( view );