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Sweden-Number/memory/virtual.c

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/*
* Win32 virtual memory functions
*
* Copyright 1997 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include "winnls.h"
#include "winbase.h"
#include "wine/exception.h"
#include "wine/unicode.h"
#include "wine/library.h"
#include "winerror.h"
#include "file.h"
#include "global.h"
#include "wine/server.h"
#include "msvcrt/excpt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(virtual);
WINE_DECLARE_DEBUG_CHANNEL(module);
#ifndef MS_SYNC
#define MS_SYNC 0
#endif
/* File view */
typedef struct _FV
{
struct _FV *next; /* Next view */
struct _FV *prev; /* Prev view */
void *base; /* Base address */
UINT size; /* Size in bytes */
UINT flags; /* Allocation flags */
HANDLE mapping; /* Handle to the file mapping */
HANDLERPROC handlerProc; /* Fault handler */
LPVOID handlerArg; /* Fault handler argument */
BYTE protect; /* Protection for all pages at allocation time */
BYTE prot[1]; /* Protection byte for each page */
} FILE_VIEW;
/* Per-view flags */
#define VFLAG_SYSTEM 0x01
#define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
/* Conversion from VPROT_* to Win32 flags */
static const BYTE VIRTUAL_Win32Flags[16] =
{
PAGE_NOACCESS, /* 0 */
PAGE_READONLY, /* READ */
PAGE_READWRITE, /* WRITE */
PAGE_READWRITE, /* READ | WRITE */
PAGE_EXECUTE, /* EXEC */
PAGE_EXECUTE_READ, /* READ | EXEC */
PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
PAGE_WRITECOPY, /* WRITECOPY */
PAGE_WRITECOPY, /* READ | WRITECOPY */
PAGE_WRITECOPY, /* WRITE | WRITECOPY */
PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
};
static FILE_VIEW *VIRTUAL_FirstView;
static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT("csVirtual");
#ifdef __i386__
/* These are always the same on an i386, and it will be faster this way */
# define page_mask 0xfff
# define page_shift 12
# define page_size 0x1000
#else
static UINT page_shift;
static UINT page_mask;
static UINT page_size;
#endif /* __i386__ */
#define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
#define ROUND_ADDR(addr,mask) \
((void *)((UINT_PTR)(addr) & ~(mask)))
#define ROUND_SIZE(addr,size) \
(((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
#define VIRTUAL_DEBUG_DUMP_VIEW(view) \
if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset_low,
DWORD offset_high, int prot, int flags, BOOL *removable );
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
/***********************************************************************
* VIRTUAL_GetProtStr
*/
static const char *VIRTUAL_GetProtStr( BYTE prot )
{
static char buffer[6];
buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
buffer[3] = (prot & VPROT_WRITE) ?
((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
buffer[5] = 0;
return buffer;
}
/***********************************************************************
* VIRTUAL_DumpView
*/
static void VIRTUAL_DumpView( FILE_VIEW *view )
{
UINT i, count;
char *addr = view->base;
BYTE prot = view->prot[0];
DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
if (view->flags & VFLAG_SYSTEM)
DPRINTF( " (system)\n" );
else if (view->flags & VFLAG_VALLOC)
DPRINTF( " (valloc)\n" );
else if (view->mapping)
DPRINTF( " %d\n", view->mapping );
else
DPRINTF( " (anonymous)\n");
for (count = i = 1; i < view->size >> page_shift; i++, count++)
{
if (view->prot[i] == prot) continue;
DPRINTF( " %p - %p %s\n",
addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
addr += (count << page_shift);
prot = view->prot[i];
count = 0;
}
if (count)
DPRINTF( " %p - %p %s\n",
addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
}
/***********************************************************************
* VIRTUAL_Dump
*/
void VIRTUAL_Dump(void)
{
FILE_VIEW *view;
DPRINTF( "\nDump of all virtual memory views:\n\n" );
EnterCriticalSection(&csVirtual);
view = VIRTUAL_FirstView;
while (view)
{
VIRTUAL_DumpView( view );
view = view->next;
}
LeaveCriticalSection(&csVirtual);
}
/***********************************************************************
* VIRTUAL_FindView
*
* Find the view containing a given address.
*
* RETURNS
* View: Success
* NULL: Failure
*/
static FILE_VIEW *VIRTUAL_FindView( const void *addr ) /* [in] Address */
{
FILE_VIEW *view;
EnterCriticalSection(&csVirtual);
view = VIRTUAL_FirstView;
while (view)
{
if (view->base > addr)
{
view = NULL;
break;
}
if (view->base + view->size > addr) break;
view = view->next;
}
LeaveCriticalSection(&csVirtual);
return view;
}
/***********************************************************************
* VIRTUAL_CreateView
*
* Create a new view and add it in the linked list.
*/
static FILE_VIEW *VIRTUAL_CreateView( void *base, UINT size, UINT flags,
BYTE vprot, HANDLE mapping )
{
FILE_VIEW *view, *prev;
/* Create the view structure */
assert( !((unsigned int)base & page_mask) );
assert( !(size & page_mask) );
size >>= page_shift;
if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
view->base = base;
view->size = size << page_shift;
view->flags = flags;
view->mapping = mapping;
view->protect = vprot;
view->handlerProc = NULL;
memset( view->prot, vprot, size );
/* Duplicate the mapping handle */
if (view->mapping &&
!DuplicateHandle( GetCurrentProcess(), view->mapping,
GetCurrentProcess(), &view->mapping,
0, FALSE, DUPLICATE_SAME_ACCESS ))
{
free( view );
return NULL;
}
/* Insert it in the linked list */
EnterCriticalSection(&csVirtual);
if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
{
view->next = VIRTUAL_FirstView;
view->prev = NULL;
if (view->next) view->next->prev = view;
VIRTUAL_FirstView = view;
}
else
{
prev = VIRTUAL_FirstView;
while (prev->next && (prev->next->base < base)) prev = prev->next;
view->next = prev->next;
view->prev = prev;
if (view->next) view->next->prev = view;
prev->next = view;
}
LeaveCriticalSection(&csVirtual);
VIRTUAL_DEBUG_DUMP_VIEW( view );
return view;
}
/***********************************************************************
* VIRTUAL_DeleteView
* Deletes a view.
*
* RETURNS
* None
*/
static void VIRTUAL_DeleteView(
FILE_VIEW *view /* [in] View */
) {
if (!(view->flags & VFLAG_SYSTEM))
munmap( (void *)view->base, view->size );
EnterCriticalSection(&csVirtual);
if (view->next) view->next->prev = view->prev;
if (view->prev) view->prev->next = view->next;
else VIRTUAL_FirstView = view->next;
LeaveCriticalSection(&csVirtual);
if (view->mapping) NtClose( view->mapping );
free( view );
}
/***********************************************************************
* VIRTUAL_GetUnixProt
*
* Convert page protections to protection for mmap/mprotect.
*/
static int VIRTUAL_GetUnixProt( BYTE vprot )
{
int prot = 0;
if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
{
if (vprot & VPROT_READ) prot |= PROT_READ;
if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
}
return prot;
}
/***********************************************************************
* VIRTUAL_GetWin32Prot
*
* Convert page protections to Win32 flags.
*
* RETURNS
* None
*/
static void VIRTUAL_GetWin32Prot(
BYTE vprot, /* [in] Page protection flags */
DWORD *protect, /* [out] Location to store Win32 protection flags */
DWORD *state /* [out] Location to store mem state flag */
) {
if (protect) {
*protect = VIRTUAL_Win32Flags[vprot & 0x0f];
/* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
}
if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
}
/***********************************************************************
* VIRTUAL_GetProt
*
* Build page protections from Win32 flags.
*
* RETURNS
* Value of page protection flags
*/
static BYTE VIRTUAL_GetProt(
DWORD protect /* [in] Win32 protection flags */
) {
BYTE vprot;
switch(protect & 0xff)
{
case PAGE_READONLY:
vprot = VPROT_READ;
break;
case PAGE_READWRITE:
vprot = VPROT_READ | VPROT_WRITE;
break;
case PAGE_WRITECOPY:
/* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
* that the hFile must have been opened with GENERIC_READ and
* GENERIC_WRITE access. This is WRONG as tests show that you
* only need GENERIC_READ access (at least for Win9x,
* FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
* PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
*/
vprot = VPROT_READ | VPROT_WRITECOPY;
break;
case PAGE_EXECUTE:
vprot = VPROT_EXEC;
break;
case PAGE_EXECUTE_READ:
vprot = VPROT_EXEC | VPROT_READ;
break;
case PAGE_EXECUTE_READWRITE:
vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
break;
case PAGE_EXECUTE_WRITECOPY:
/* See comment for PAGE_WRITECOPY above */
vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
break;
case PAGE_NOACCESS:
default:
vprot = 0;
break;
}
if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
return vprot;
}
/***********************************************************************
* VIRTUAL_SetProt
*
* Change the protection of a range of pages.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
void *base, /* [in] Starting address */
UINT size, /* [in] Size in bytes */
BYTE vprot ) /* [in] Protections to use */
{
TRACE("%p-%p %s\n",
base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
return FALSE; /* FIXME: last error */
memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
vprot, size >> page_shift );
VIRTUAL_DEBUG_DUMP_VIEW( view );
return TRUE;
}
/***********************************************************************
* anon_mmap_aligned
*
* Create an anonymous mapping aligned to the allocation granularity.
*/
static void *anon_mmap_aligned( void *base, unsigned int size, int prot, int flags )
{
void *ptr;
unsigned int view_size = size + (base ? 0 : granularity_mask + 1);
if ((ptr = wine_anon_mmap( base, view_size, prot, flags )) == (void *)-1)
{
/* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
* Platform Differences":
* Windows NT: ERROR_INVALID_PARAMETER
* Windows 95: ERROR_INVALID_ADDRESS.
*/
if (errno == ENOMEM) SetLastError( ERROR_OUTOFMEMORY );
else
{
if (GetVersion() & 0x80000000) /* win95 */
SetLastError( ERROR_INVALID_ADDRESS );
else
SetLastError( ERROR_INVALID_PARAMETER );
}
return ptr;
}
if (!base)
{
/* Release the extra memory while keeping the range
* starting on the granularity boundary. */
if ((unsigned int)ptr & granularity_mask)
{
unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
munmap( ptr, extra );
ptr = (char *)ptr + extra;
view_size -= extra;
}
if (view_size > size)
munmap( (char *)ptr + size, view_size - size );
}
else if (ptr != base)
{
/* We couldn't get the address we wanted */
munmap( ptr, view_size );
SetLastError( ERROR_INVALID_ADDRESS );
ptr = (void *)-1;
}
return ptr;
}
/***********************************************************************
* map_image
*
* Map an executable (PE format) image into memory.
*/
static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
DWORD header_size, HANDLE shared_file, DWORD shared_size,
BOOL removable )
{
IMAGE_DOS_HEADER *dos;
IMAGE_NT_HEADERS *nt;
IMAGE_SECTION_HEADER *sec;
IMAGE_DATA_DIRECTORY *imports;
int i, pos;
DWORD err = GetLastError();
FILE_VIEW *view;
char *ptr;
int shared_fd = -1;
SetLastError( ERROR_BAD_EXE_FORMAT ); /* generic error */
/* zero-map the whole range */
if ((ptr = wine_anon_mmap( base, total_size,
PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
{
ptr = wine_anon_mmap( NULL, total_size,
PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
if (ptr == (char *)-1)
{
ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
goto error;
}
}
TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
/* map the header */
if (VIRTUAL_mmap( fd, ptr, header_size, 0, 0, PROT_READ,
MAP_PRIVATE | MAP_FIXED, &removable ) == (char *)-1) goto error;
dos = (IMAGE_DOS_HEADER *)ptr;
nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
if ((char *)(nt + 1) > ptr + header_size) goto error;
sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
if (!imports->Size || !imports->VirtualAddress) imports = NULL;
/* check the architecture */
if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
{
MESSAGE("Trying to load PE image for unsupported architecture (");
switch (nt->FileHeader.Machine)
{
case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
}
MESSAGE(")\n");
goto error;
}
/* retrieve the shared sections file */
if (shared_size)
{
if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
CloseHandle( shared_file ); /* we no longer need it */
shared_file = 0;
}
/* map all the sections */
for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
{
DWORD size;
/* a few sanity checks */
size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
{
ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
goto error;
}
if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
(sec->Characteristics & IMAGE_SCN_MEM_WRITE))
{
size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
sec->Name, ptr + sec->VirtualAddress,
sec->PointerToRawData, pos, sec->SizeOfRawData,
size, sec->Characteristics );
if (VIRTUAL_mmap( shared_fd, ptr + sec->VirtualAddress, size,
pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_SHARED|MAP_FIXED, NULL ) == (void *)-1)
{
ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
goto error;
}
/* check if the import directory falls inside this section */
if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
imports->VirtualAddress < sec->VirtualAddress + size)
{
DWORD base = imports->VirtualAddress & ~page_mask;
DWORD end = imports->VirtualAddress + ROUND_SIZE( imports->VirtualAddress,
imports->Size );
if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
if (end > base) VIRTUAL_mmap( shared_fd, ptr + base, end - base,
pos, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED, NULL );
}
pos += size;
continue;
}
if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
sec->Name, ptr + sec->VirtualAddress,
sec->PointerToRawData, sec->SizeOfRawData,
sec->Characteristics );
/* Note: if the section is not aligned properly VIRTUAL_mmap will magically
* fall back to read(), so we don't need to check anything here.
*/
if (VIRTUAL_mmap( fd, ptr + sec->VirtualAddress, sec->SizeOfRawData,
sec->PointerToRawData, 0, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE | MAP_FIXED, &removable ) == (void *)-1)
{
ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
goto error;
}
if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
{
DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
TRACE_(module)("clearing %p - %p\n",
ptr + sec->VirtualAddress + sec->SizeOfRawData,
ptr + sec->VirtualAddress + end );
memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
end - sec->SizeOfRawData );
}
}
if (removable) hmapping = 0; /* don't keep handle open on removable media */
if (!(view = VIRTUAL_CreateView( ptr, total_size, 0,
VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
hmapping )))
{
SetLastError( ERROR_OUTOFMEMORY );
goto error;
}
SetLastError( err ); /* restore last error */
close( fd );
if (shared_fd != -1) close( shared_fd );
return ptr;
error:
if (ptr != (char *)-1) munmap( ptr, total_size );
close( fd );
if (shared_fd != -1) close( shared_fd );
if (shared_file) CloseHandle( shared_file );
return NULL;
}
/***********************************************************************
* VIRTUAL_Init
*/
#ifndef page_mask
DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
{
page_size = getpagesize();
page_mask = page_size - 1;
/* Make sure we have a power of 2 */
assert( !(page_size & page_mask) );
page_shift = 0;
while ((1 << page_shift) != page_size) page_shift++;
}
#endif /* page_mask */
/***********************************************************************
* VIRTUAL_SetFaultHandler
*/
BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
{
FILE_VIEW *view;
if (!(view = VIRTUAL_FindView( addr ))) return FALSE;
view->handlerProc = proc;
view->handlerArg = arg;
return TRUE;
}
/***********************************************************************
* VIRTUAL_HandleFault
*/
DWORD VIRTUAL_HandleFault( LPCVOID addr )
{
FILE_VIEW *view = VIRTUAL_FindView( addr );
DWORD ret = EXCEPTION_ACCESS_VIOLATION;
if (view)
{
if (view->handlerProc)
{
if (view->handlerProc(view->handlerArg, addr)) ret = 0; /* handled */
}
else
{
BYTE vprot = view->prot[((char *)addr - (char *)view->base) >> page_shift];
void *page = (void *)((UINT_PTR)addr & ~page_mask);
char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
if (vprot & VPROT_GUARD)
{
VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
ret = STATUS_GUARD_PAGE_VIOLATION;
}
/* is it inside the stack guard pages? */
if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
ret = STATUS_STACK_OVERFLOW;
}
}
return ret;
}
/***********************************************************************
* unaligned_mmap
*
* Linux kernels before 2.4.x can support non page-aligned offsets, as
* long as the offset is aligned to the filesystem block size. This is
* a big performance gain so we want to take advantage of it.
*
* However, when we use 64-bit file support this doesn't work because
* glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
* in that it rounds unaligned offsets down to a page boundary. For
* these reasons we do a direct system call here.
*/
static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
unsigned int flags, int fd, unsigned int offset_low,
unsigned int offset_high )
{
#if defined(linux) && defined(__i386__) && defined(__GNUC__)
if (!offset_high && (offset_low & page_mask))
{
int ret;
__asm__ __volatile__("push %%ebx\n\t"
"movl %2,%%ebx\n\t"
"int $0x80\n\t"
"popl %%ebx"
: "=a" (ret)
: "0" (90), /* SYS_mmap */
"g" (&addr) );
if (ret < 0 && ret > -4096)
{
errno = -ret;
ret = -1;
}
return (void *)ret;
}
#endif
return mmap( addr, length, prot, flags, fd, ((off_t)offset_high << 32) | offset_low );
}
/***********************************************************************
* VIRTUAL_mmap
*
* Wrapper for mmap() that handles anonymous mappings portably,
* and falls back to read if mmap of a file fails.
*/
static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
DWORD offset_low, DWORD offset_high,
int prot, int flags, BOOL *removable )
{
int pos;
LPVOID ret;
off_t offset;
BOOL is_shared_write = FALSE;
if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
if (prot & PROT_WRITE)
{
#ifdef MAP_SHARED
if (flags & MAP_SHARED) is_shared_write = TRUE;
#endif
#ifdef MAP_PRIVATE
if (!(flags & MAP_PRIVATE)) is_shared_write = TRUE;
#endif
}
if (removable && *removable)
{
/* if on removable media, try using read instead of mmap */
if (!is_shared_write) goto fake_mmap;
*removable = FALSE;
}
if ((ret = unaligned_mmap( start, size, prot, flags, fd,
offset_low, offset_high )) != (LPVOID)-1) return ret;
/* mmap() failed; if this is because the file offset is not */
/* page-aligned (EINVAL), or because the underlying filesystem */
/* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
if (is_shared_write) return ret; /* we cannot fake shared write mappings */
fake_mmap:
/* Reserve the memory with an anonymous mmap */
ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
if (ret == (LPVOID)-1) return ret;
/* Now read in the file */
offset = ((off_t)offset_high << 32) | offset_low;
if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
{
munmap( ret, size );
return (LPVOID)-1;
}
read( fd, ret, size );
lseek( fd, pos, SEEK_SET ); /* Restore the file pointer */
mprotect( ret, size, prot ); /* Set the right protection */
return ret;
}
/***********************************************************************
* VirtualAlloc (KERNEL32.@)
* Reserves or commits a region of pages in virtual address space
*
* RETURNS
* Base address of allocated region of pages
* NULL: Failure
*/
LPVOID WINAPI VirtualAlloc(
LPVOID addr, /* [in] Address of region to reserve or commit */
DWORD size, /* [in] Size of region */
DWORD type, /* [in] Type of allocation */
DWORD protect)/* [in] Type of access protection */
{
FILE_VIEW *view;
char *ptr, *base;
BYTE vprot;
TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
/* Round parameters to a page boundary */
if (size > 0x7fc00000) /* 2Gb - 4Mb */
{
SetLastError( ERROR_OUTOFMEMORY );
return NULL;
}
if (addr)
{
if (type & MEM_RESERVE) /* Round down to 64k boundary */
base = ROUND_ADDR( addr, granularity_mask );
else
base = ROUND_ADDR( addr, page_mask );
size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
if ((base <= (char *)granularity_mask) || (base + size < base))
{
/* disallow low 64k and wrap-around */
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
}
else
{
base = 0;
size = (size + page_mask) & ~page_mask;
}
if (type & MEM_TOP_DOWN) {
/* FIXME: MEM_TOP_DOWN allocates the largest possible address.
* Is there _ANY_ way to do it with UNIX mmap()?
*/
WARN("MEM_TOP_DOWN ignored\n");
type &= ~MEM_TOP_DOWN;
}
/* Compute the alloc type flags */
if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
(type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
{
ERR("called with wrong alloc type flags (%08lx) !\n", type);
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
if (type & (MEM_COMMIT | MEM_SYSTEM))
vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
else vprot = 0;
/* Reserve the memory */
if ((type & MEM_RESERVE) || !base)
{
if (type & MEM_SYSTEM)
{
if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
{
SetLastError( ERROR_OUTOFMEMORY );
return NULL;
}
return (LPVOID)base;
}
ptr = anon_mmap_aligned( base, size, VIRTUAL_GetUnixProt( vprot ), 0 );
if (ptr == (void *)-1) return NULL;
if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
{
munmap( ptr, size );
SetLastError( ERROR_OUTOFMEMORY );
return NULL;
}
return ptr;
}
/* Commit the pages */
if (!(view = VIRTUAL_FindView( base )) ||
(base + size > (char *)view->base + view->size))
{
SetLastError( ERROR_INVALID_ADDRESS );
return NULL;
}
if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
return (LPVOID)base;
}
/***********************************************************************
* VirtualAllocEx (KERNEL32.@)
*
* Seems to be just as VirtualAlloc, but with process handle.
*/
LPVOID WINAPI VirtualAllocEx(
HANDLE hProcess, /* [in] Handle of process to do mem operation */
LPVOID addr, /* [in] Address of region to reserve or commit */
DWORD size, /* [in] Size of region */
DWORD type, /* [in] Type of allocation */
DWORD protect /* [in] Type of access protection */
) {
if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
return VirtualAlloc( addr, size, type, protect );
ERR("Unsupported on other process\n");
return NULL;
}
/***********************************************************************
* VirtualFree (KERNEL32.@)
* Release or decommits a region of pages in virtual address space.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI VirtualFree(
LPVOID addr, /* [in] Address of region of committed pages */
DWORD size, /* [in] Size of region */
DWORD type /* [in] Type of operation */
) {
FILE_VIEW *view;
char *base;
TRACE("%p %08lx %lx\n", addr, size, type );
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
if (!(view = VIRTUAL_FindView( base )) ||
(base + size > (char *)view->base + view->size) ||
!(view->flags & VFLAG_VALLOC))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
/* Check the type */
if (type & MEM_SYSTEM)
{
view->flags |= VFLAG_SYSTEM;
type &= ~MEM_SYSTEM;
}
if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
{
ERR("called with wrong free type flags (%08lx) !\n", type);
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
/* Free the pages */
if (type == MEM_RELEASE)
{
if (size || (base != view->base))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
VIRTUAL_DeleteView( view );
return TRUE;
}
/* Decommit the pages by remapping zero-pages instead */
if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
ERR( "Could not remap pages, expect trouble\n" );
return VIRTUAL_SetProt( view, base, size, 0 );
}
/***********************************************************************
* VirtualLock (KERNEL32.@)
* Locks the specified region of virtual address space
*
* NOTE
* Always returns TRUE
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI VirtualLock(
LPVOID addr, /* [in] Address of first byte of range to lock */
DWORD size /* [in] Number of bytes in range to lock */
) {
return TRUE;
}
/***********************************************************************
* VirtualUnlock (KERNEL32.@)
* Unlocks a range of pages in the virtual address space
*
* NOTE
* Always returns TRUE
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI VirtualUnlock(
LPVOID addr, /* [in] Address of first byte of range */
DWORD size /* [in] Number of bytes in range */
) {
return TRUE;
}
/***********************************************************************
* VirtualProtect (KERNEL32.@)
* Changes the access protection on a region of committed pages
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI VirtualProtect(
LPVOID addr, /* [in] Address of region of committed pages */
DWORD size, /* [in] Size of region */
DWORD new_prot, /* [in] Desired access protection */
LPDWORD old_prot /* [out] Address of variable to get old protection */
) {
FILE_VIEW *view;
char *base;
UINT i;
BYTE vprot, *p;
DWORD prot;
TRACE("%p %08lx %08lx\n", addr, size, new_prot );
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
if (!(view = VIRTUAL_FindView( base )) ||
(base + size > (char *)view->base + view->size))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
/* Make sure all the pages are committed */
p = view->prot + ((base - (char *)view->base) >> page_shift);
VIRTUAL_GetWin32Prot( *p, &prot, NULL );
for (i = size >> page_shift; i; i--, p++)
{
if (!(*p & VPROT_COMMITTED))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
}
if (old_prot) *old_prot = prot;
vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
return VIRTUAL_SetProt( view, base, size, vprot );
}
/***********************************************************************
* VirtualProtectEx (KERNEL32.@)
* Changes the access protection on a region of committed pages in the
* virtual address space of a specified process
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI VirtualProtectEx(
HANDLE handle, /* [in] Handle of process */
LPVOID addr, /* [in] Address of region of committed pages */
DWORD size, /* [in] Size of region */
DWORD new_prot, /* [in] Desired access protection */
LPDWORD old_prot /* [out] Address of variable to get old protection */ )
{
if (MapProcessHandle( handle ) == GetCurrentProcessId())
return VirtualProtect( addr, size, new_prot, old_prot );
ERR("Unsupported on other process\n");
return FALSE;
}
/***********************************************************************
* VirtualQuery (KERNEL32.@)
* Provides info about a range of pages in virtual address space
*
* RETURNS
* Number of bytes returned in information buffer
* or 0 if addr is >= 0xc0000000 (kernel space).
*/
DWORD WINAPI VirtualQuery(
LPCVOID addr, /* [in] Address of region */
LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
DWORD len /* [in] Size of buffer */
) {
FILE_VIEW *view;
char *base, *alloc_base = 0;
UINT size = 0;
if (addr >= (void*)0xc0000000) return 0;
base = ROUND_ADDR( addr, page_mask );
/* Find the view containing the address */
EnterCriticalSection(&csVirtual);
view = VIRTUAL_FirstView;
for (;;)
{
if (!view)
{
size = (char *)0xffff0000 - alloc_base;
break;
}
if ((char *)view->base > base)
{
size = (char *)view->base - alloc_base;
view = NULL;
break;
}
if ((char *)view->base + view->size > base)
{
alloc_base = view->base;
size = view->size;
break;
}
alloc_base = (char *)view->base + view->size;
view = view->next;
}
LeaveCriticalSection(&csVirtual);
/* Fill the info structure */
if (!view)
{
info->State = MEM_FREE;
info->Protect = 0;
info->AllocationProtect = 0;
info->Type = 0;
}
else
{
BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
for (size = base - alloc_base; size < view->size; size += page_mask+1)
if (view->prot[size >> page_shift] != vprot) break;
info->AllocationProtect = view->protect;
info->Type = MEM_PRIVATE; /* FIXME */
}
info->BaseAddress = (LPVOID)base;
info->AllocationBase = (LPVOID)alloc_base;
info->RegionSize = size - (base - alloc_base);
return sizeof(*info);
}
/***********************************************************************
* VirtualQueryEx (KERNEL32.@)
* Provides info about a range of pages in virtual address space of a
* specified process
*
* RETURNS
* Number of bytes returned in information buffer
*/
DWORD WINAPI VirtualQueryEx(
HANDLE handle, /* [in] Handle of process */
LPCVOID addr, /* [in] Address of region */
LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
DWORD len /* [in] Size of buffer */ )
{
if (MapProcessHandle( handle ) == GetCurrentProcessId())
return VirtualQuery( addr, info, len );
ERR("Unsupported on other process\n");
return 0;
}
/***********************************************************************
* IsBadReadPtr (KERNEL32.@)
*
* RETURNS
* FALSE: Process has read access to entire block
* TRUE: Otherwise
*/
BOOL WINAPI IsBadReadPtr(
LPCVOID ptr, /* [in] Address of memory block */
UINT size ) /* [in] Size of block */
{
if (!size) return FALSE; /* handle 0 size case w/o reference */
__TRY
{
volatile const char *p = ptr;
char dummy;
UINT count = size;
while (count > page_size)
{
dummy = *p;
p += page_size;
count -= page_size;
}
dummy = p[0];
dummy = p[count - 1];
}
__EXCEPT(page_fault) { return TRUE; }
__ENDTRY
return FALSE;
}
/***********************************************************************
* IsBadWritePtr (KERNEL32.@)
*
* RETURNS
* FALSE: Process has write access to entire block
* TRUE: Otherwise
*/
BOOL WINAPI IsBadWritePtr(
LPVOID ptr, /* [in] Address of memory block */
UINT size ) /* [in] Size of block in bytes */
{
if (!size) return FALSE; /* handle 0 size case w/o reference */
__TRY
{
volatile char *p = ptr;
UINT count = size;
while (count > page_size)
{
*p |= 0;
p += page_size;
count -= page_size;
}
p[0] |= 0;
p[count - 1] |= 0;
}
__EXCEPT(page_fault) { return TRUE; }
__ENDTRY
return FALSE;
}
/***********************************************************************
* IsBadHugeReadPtr (KERNEL32.@)
* RETURNS
* FALSE: Process has read access to entire block
* TRUE: Otherwise
*/
BOOL WINAPI IsBadHugeReadPtr(
LPCVOID ptr, /* [in] Address of memory block */
UINT size /* [in] Size of block */
) {
return IsBadReadPtr( ptr, size );
}
/***********************************************************************
* IsBadHugeWritePtr (KERNEL32.@)
* RETURNS
* FALSE: Process has write access to entire block
* TRUE: Otherwise
*/
BOOL WINAPI IsBadHugeWritePtr(
LPVOID ptr, /* [in] Address of memory block */
UINT size /* [in] Size of block */
) {
return IsBadWritePtr( ptr, size );
}
/***********************************************************************
* IsBadCodePtr (KERNEL32.@)
*
* RETURNS
* FALSE: Process has read access to specified memory
* TRUE: Otherwise
*/
BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
{
return IsBadReadPtr( ptr, 1 );
}
/***********************************************************************
* IsBadStringPtrA (KERNEL32.@)
*
* RETURNS
* FALSE: Read access to all bytes in string
* TRUE: Else
*/
BOOL WINAPI IsBadStringPtrA(
LPCSTR str, /* [in] Address of string */
UINT max ) /* [in] Maximum size of string */
{
__TRY
{
volatile const char *p = str;
while (p != str + max) if (!*p++) break;
}
__EXCEPT(page_fault) { return TRUE; }
__ENDTRY
return FALSE;
}
/***********************************************************************
* IsBadStringPtrW (KERNEL32.@)
* See IsBadStringPtrA
*/
BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
{
__TRY
{
volatile const WCHAR *p = str;
while (p != str + max) if (!*p++) break;
}
__EXCEPT(page_fault) { return TRUE; }
__ENDTRY
return FALSE;
}
/***********************************************************************
* CreateFileMappingA (KERNEL32.@)
* Creates a named or unnamed file-mapping object for the specified file
*
* RETURNS
* Handle: Success
* 0: Mapping object does not exist
* NULL: Failure
*/
HANDLE WINAPI CreateFileMappingA(
HANDLE hFile, /* [in] Handle of file to map */
SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
DWORD protect, /* [in] Protection for mapping object */
DWORD size_high, /* [in] High-order 32 bits of object size */
DWORD size_low, /* [in] Low-order 32 bits of object size */
LPCSTR name /* [in] Name of file-mapping object */ )
{
WCHAR buffer[MAX_PATH];
if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
}
/***********************************************************************
* CreateFileMappingW (KERNEL32.@)
* See CreateFileMappingA
*/
HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
DWORD protect, DWORD size_high,
DWORD size_low, LPCWSTR name )
{
HANDLE ret;
BYTE vprot;
DWORD len = name ? strlenW(name) : 0;
/* Check parameters */
TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
hFile, sa, protect, size_high, size_low, debugstr_w(name) );
if (len > MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
vprot = VIRTUAL_GetProt( protect );
if (protect & SEC_RESERVE)
{
if (hFile != INVALID_HANDLE_VALUE)
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
}
else vprot |= VPROT_COMMITTED;
if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
/* Create the server object */
if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
SERVER_START_REQ( create_mapping )
{
req->file_handle = hFile;
req->size_high = size_high;
req->size_low = size_low;
req->protect = vprot;
req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
wine_server_add_data( req, name, len * sizeof(WCHAR) );
SetLastError(0);
wine_server_call_err( req );
ret = reply->handle;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* OpenFileMappingA (KERNEL32.@)
* Opens a named file-mapping object.
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HANDLE WINAPI OpenFileMappingA(
DWORD access, /* [in] Access mode */
BOOL inherit, /* [in] Inherit flag */
LPCSTR name ) /* [in] Name of file-mapping object */
{
WCHAR buffer[MAX_PATH];
if (!name) return OpenFileMappingW( access, inherit, NULL );
if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
return OpenFileMappingW( access, inherit, buffer );
}
/***********************************************************************
* OpenFileMappingW (KERNEL32.@)
* See OpenFileMappingA
*/
HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
{
HANDLE ret;
DWORD len = name ? strlenW(name) : 0;
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
SERVER_START_REQ( open_mapping )
{
req->access = access;
req->inherit = inherit;
wine_server_add_data( req, name, len * sizeof(WCHAR) );
wine_server_call_err( req );
ret = reply->handle;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* MapViewOfFile (KERNEL32.@)
* Maps a view of a file into the address space
*
* RETURNS
* Starting address of mapped view
* NULL: Failure
*/
LPVOID WINAPI MapViewOfFile(
HANDLE mapping, /* [in] File-mapping object to map */
DWORD access, /* [in] Access mode */
DWORD offset_high, /* [in] High-order 32 bits of file offset */
DWORD offset_low, /* [in] Low-order 32 bits of file offset */
DWORD count /* [in] Number of bytes to map */
) {
return MapViewOfFileEx( mapping, access, offset_high,
offset_low, count, NULL );
}
/***********************************************************************
* MapViewOfFileEx (KERNEL32.@)
* Maps a view of a file into the address space
*
* RETURNS
* Starting address of mapped view
* NULL: Failure
*/
LPVOID WINAPI MapViewOfFileEx(
HANDLE handle, /* [in] File-mapping object to map */
DWORD access, /* [in] Access mode */
DWORD offset_high, /* [in] High-order 32 bits of file offset */
DWORD offset_low, /* [in] Low-order 32 bits of file offset */
DWORD count, /* [in] Number of bytes to map */
LPVOID addr /* [in] Suggested starting address for mapped view */
) {
FILE_VIEW *view;
UINT size = 0;
int flags = MAP_PRIVATE;
int unix_handle = -1;
int prot, res;
void *base, *ptr = (void *)-1, *ret;
DWORD size_low, size_high, header_size, shared_size;
HANDLE shared_file;
BOOL removable;
/* Check parameters */
if ((offset_low & granularity_mask) ||
(addr && ((UINT_PTR)addr & granularity_mask)))
{
SetLastError( ERROR_INVALID_PARAMETER );
return NULL;
}
SERVER_START_REQ( get_mapping_info )
{
req->handle = handle;
res = wine_server_call_err( req );
prot = reply->protect;
base = reply->base;
size_low = reply->size_low;
size_high = reply->size_high;
header_size = reply->header_size;
shared_file = reply->shared_file;
shared_size = reply->shared_size;
removable = (reply->drive_type == DRIVE_REMOVABLE ||
reply->drive_type == DRIVE_CDROM);
}
SERVER_END_REQ;
if (res) goto error;
if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
if (prot & VPROT_IMAGE)
return map_image( handle, unix_handle, base, size_low, header_size,
shared_file, shared_size, removable );
if (size_high)
ERR("Sizes larger than 4Gb not supported\n");
if ((offset_low >= size_low) ||
(count > size_low - offset_low))
{
SetLastError( ERROR_INVALID_PARAMETER );
goto error;
}
if (count) size = ROUND_SIZE( offset_low, count );
else size = size_low - offset_low;
switch(access)
{
case FILE_MAP_ALL_ACCESS:
case FILE_MAP_WRITE:
case FILE_MAP_WRITE | FILE_MAP_READ:
if (!(prot & VPROT_WRITE))
{
SetLastError( ERROR_INVALID_PARAMETER );
goto error;
}
flags = MAP_SHARED;
/* fall through */
case FILE_MAP_READ:
case FILE_MAP_COPY:
case FILE_MAP_COPY | FILE_MAP_READ:
if (prot & VPROT_READ) break;
/* fall through */
default:
SetLastError( ERROR_INVALID_PARAMETER );
goto error;
}
/* FIXME: If a mapping is created with SEC_RESERVE and a process,
* which has a view of this mapping commits some pages, they will
* appear commited in all other processes, which have the same
* view created. Since we don`t support this yet, we create the
* whole mapping commited.
*/
prot |= VPROT_COMMITTED;
/* Reserve a properly aligned area */
if ((ptr = anon_mmap_aligned( addr, size, PROT_NONE, 0 )) == (void *)-1) goto error;
/* Map the file */
TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
ret = VIRTUAL_mmap( unix_handle, ptr, size, offset_low, offset_high,
VIRTUAL_GetUnixProt( prot ), flags | MAP_FIXED, &removable );
if (ret != ptr)
{
ERR( "VIRTUAL_mmap %p %x %lx%08lx failed\n", ptr, size, offset_high, offset_low );
goto error;
}
if (removable) handle = 0; /* don't keep handle open on removable media */
if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
{
SetLastError( ERROR_OUTOFMEMORY );
goto error;
}
if (unix_handle != -1) close( unix_handle );
return ptr;
error:
if (unix_handle != -1) close( unix_handle );
if (ptr != (void *)-1) munmap( ptr, size );
return NULL;
}
/***********************************************************************
* FlushViewOfFile (KERNEL32.@)
* Writes to the disk a byte range within a mapped view of a file
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI FlushViewOfFile(
LPCVOID base, /* [in] Start address of byte range to flush */
DWORD cbFlush /* [in] Number of bytes in range */
) {
FILE_VIEW *view;
void *addr = ROUND_ADDR( base, page_mask );
TRACE("FlushViewOfFile at %p for %ld bytes\n",
base, cbFlush );
if (!(view = VIRTUAL_FindView( addr )))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if (!cbFlush) cbFlush = view->size;
if (!msync( addr, cbFlush, MS_SYNC )) return TRUE;
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
/***********************************************************************
* UnmapViewOfFile (KERNEL32.@)
* Unmaps a mapped view of a file.
*
* NOTES
* Should addr be an LPCVOID?
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI UnmapViewOfFile(
LPVOID addr /* [in] Address where mapped view begins */
) {
FILE_VIEW *view;
void *base = ROUND_ADDR( addr, page_mask );
if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
VIRTUAL_DeleteView( view );
return TRUE;
}
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