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goma / wine / d2acb8cf8b391dd55aa1014a70bb2cbbe141ba3c / . / dlls / ntdll / virtual.c
blob: 17fb83bf792bc799723460493378cedf6bd364ec [file] [log] [blame]
/*
* Win32 virtual memory functions
*
* Copyright 1997, 2002 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>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#include "thread.h"
#include "winternl.h"
#include "winioctl.h"
#include "wine/library.h"
#include "wine/server.h"
#include "wine/list.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(virtual);
WINE_DECLARE_DEBUG_CHANNEL(module);
#ifndef MS_SYNC
#define MS_SYNC 0
#endif
#ifndef MAP_NORESERVE
#define MAP_NORESERVE 0
#endif
/* File view */
typedef struct file_view
{
struct list entry; /* Entry in global view list */
void *base; /* Base address */
UINT size; /* Size in bytes */
HANDLE mapping; /* Handle to the file mapping */
HANDLERPROC handlerProc; /* Fault handler */
LPVOID handlerArg; /* Fault handler argument */
BYTE flags; /* Allocation flags (VFLAG_*) */
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 /* system view (underlying mmap not under our control) */
#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 struct list views_list = LIST_INIT(views_list);
static CRITICAL_SECTION csVirtual;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &csVirtual,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { 0, (DWORD)(__FILE__ ": csVirtual") }
};
static CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
#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
/* Note: these are Windows limits, you cannot change them. */
# define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
# define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
#else
static UINT page_shift;
static UINT page_mask;
static UINT page_size;
# define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
# define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
#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 void *user_space_limit = USER_SPACE_LIMIT;
/***********************************************************************
* 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_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? '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( " %p\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)
{
struct list *ptr;
DPRINTF( "\nDump of all virtual memory views:\n\n" );
RtlEnterCriticalSection(&csVirtual);
LIST_FOR_EACH( ptr, &views_list )
{
VIRTUAL_DumpView( LIST_ENTRY( ptr, struct file_view, entry ) );
}
RtlLeaveCriticalSection(&csVirtual);
}
/***********************************************************************
* VIRTUAL_FindView
*
* Find the view containing a given address. The csVirtual section must be held by caller.
*
* RETURNS
* View: Success
* NULL: Failure
*/
static struct file_view *VIRTUAL_FindView( const void *addr ) /* [in] Address */
{
struct list *ptr;
LIST_FOR_EACH( ptr, &views_list )
{
struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
if (view->base > addr) break;
if ((const char*)view->base + view->size > (const char*)addr) return view;
}
return NULL;
}
/***********************************************************************
* find_view_range
*
* Find the first view overlapping at least part of the specified range.
* The csVirtual section must be held by caller.
*/
static struct file_view *find_view_range( const void *addr, size_t size )
{
struct list *ptr;
LIST_FOR_EACH( ptr, &views_list )
{
struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
if ((const char *)view->base >= (const char *)addr + size) break;
if ((const char *)view->base + view->size > (const char *)addr) return view;
}
return NULL;
}
/***********************************************************************
* add_reserved_area
*
* Add a reserved area to the list maintained by libwine.
* The csVirtual section must be held by caller.
*/
static void add_reserved_area( void *addr, size_t size )
{
TRACE( "adding %p-%p\n", addr, (char *)addr + size );
if (addr < user_space_limit)
{
/* unmap the part of the area that is below the limit */
assert( (char *)addr + size > (char *)user_space_limit );
munmap( addr, (char *)user_space_limit - (char *)addr );
size -= (char *)user_space_limit - (char *)addr;
addr = user_space_limit;
}
/* blow away existing mappings */
wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
wine_mmap_add_reserved_area( addr, size );
}
/***********************************************************************
* remove_reserved_area
*
* Remove a reserved area from the list maintained by libwine.
* The csVirtual section must be held by caller.
*/
static void remove_reserved_area( void *addr, size_t size )
{
struct list *ptr;
LIST_FOR_EACH( ptr, &views_list )
{
struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
if ((char *)view->base >= (char *)addr + size) break;
if ((char *)view->base + view->size <= (char *)addr) continue;
/* now we have an overlapping view */
if (view->base > addr)
{
wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
size -= (char *)view->base - (char *)addr;
addr = view->base;
}
if ((char *)view->base + view->size >= (char *)addr + size)
{
/* view covers all the remaining area */
wine_mmap_remove_reserved_area( addr, size, FALSE );
size = 0;
break;
}
else /* view covers only part of the area */
{
wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
size -= (char *)view->base + view->size - (char *)addr;
addr = (char *)view->base + view->size;
}
}
/* remove remaining space */
if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
}
/***********************************************************************
* is_beyond_limit
*
* Check if an address range goes beyond a given limit.
*/
static inline int is_beyond_limit( void *addr, size_t size, void *limit )
{
return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
}
/***********************************************************************
* unmap_area
*
* Unmap an area, or simply replace it by an empty mapping if it is
* in a reserved area. The csVirtual section must be held by caller.
*/
static inline void unmap_area( void *addr, size_t size )
{
if (wine_mmap_is_in_reserved_area( addr, size ))
wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
else
munmap( addr, size );
}
/***********************************************************************
* delete_view
*
* Deletes a view. The csVirtual section must be held by caller.
*/
static void delete_view( struct file_view *view ) /* [in] View */
{
if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
list_remove( &view->entry );
if (view->mapping) NtClose( view->mapping );
free( view );
}
/***********************************************************************
* create_view
*
* Create a view. The csVirtual section must be held by caller.
*/
static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
{
struct file_view *view;
struct list *ptr;
assert( !((unsigned int)base & page_mask) );
assert( !(size & page_mask) );
/* Create the view structure */
if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
view->base = base;
view->size = size;
view->flags = 0;
view->mapping = 0;
view->protect = vprot;
view->handlerProc = NULL;
memset( view->prot, vprot, size >> page_shift );
/* Insert it in the linked list */
LIST_FOR_EACH( ptr, &views_list )
{
struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
if (next->base > base) break;
}
list_add_before( ptr, &view->entry );
/* Check for overlapping views. This can happen if the previous view
* was a system view that got unmapped behind our back. In that case
* we recover by simply deleting it. */
if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
{
struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
if ((char *)prev->base + prev->size > (char *)base)
{
TRACE( "overlapping prev view %p-%p for %p-%p\n",
prev->base, (char *)prev->base + prev->size,
base, (char *)base + view->size );
assert( prev->flags & VFLAG_SYSTEM );
delete_view( prev );
}
}
if ((ptr = list_next( &views_list, &view->entry )) != NULL)
{
struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
if ((char *)base + view->size > (char *)next->base)
{
TRACE( "overlapping next view %p-%p for %p-%p\n",
next->base, (char *)next->base + next->size,
base, (char *)base + view->size );
assert( next->flags & VFLAG_SYSTEM );
delete_view( next );
}
}
*view_ret = view;
VIRTUAL_DEBUG_DUMP_VIEW( view );
return STATUS_SUCCESS;
}
/***********************************************************************
* 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;
}
/***********************************************************************
* map_view
*
* Create a view and mmap the corresponding memory area.
* The csVirtual section must be held by caller.
*/
static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
{
void *ptr;
NTSTATUS status;
if (base)
{
if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
return STATUS_WORKING_SET_LIMIT_RANGE;
switch (wine_mmap_is_in_reserved_area( base, size ))
{
case -1: /* partially in a reserved area */
return STATUS_CONFLICTING_ADDRESSES;
case 0: /* not in a reserved area, do a normal allocation */
if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
{
if (errno == ENOMEM) return STATUS_NO_MEMORY;
return STATUS_INVALID_PARAMETER;
}
if (ptr != base)
{
/* We couldn't get the address we wanted */
if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
else munmap( ptr, size );
return STATUS_CONFLICTING_ADDRESSES;
}
break;
default:
case 1: /* in a reserved area, make sure the address is available */
if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
/* replace the reserved area by our mapping */
if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
return STATUS_INVALID_PARAMETER;
break;
}
}
else
{
size_t view_size = size + granularity_mask + 1;
for (;;)
{
if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
{
if (errno == ENOMEM) return STATUS_NO_MEMORY;
return STATUS_INVALID_PARAMETER;
}
/* if we got something beyond the user limit, unmap it and retry */
if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
else break;
}
/* 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 );
}
status = create_view( view_ret, ptr, size, vprot );
if (status != STATUS_SUCCESS) unmap_area( ptr, size );
return status;
}
/***********************************************************************
* 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, off_t offset )
{
#if defined(linux) && defined(__i386__) && defined(__GNUC__)
if (!(offset >> 32) && (offset & page_mask))
{
int ret;
struct
{
void *addr;
unsigned int length;
unsigned int prot;
unsigned int flags;
unsigned int fd;
unsigned int offset;
} args;
args.addr = addr;
args.length = length;
args.prot = prot;
args.flags = flags;
args.fd = fd;
args.offset = offset;
__asm__ __volatile__("push %%ebx\n\t"
"movl %2,%%ebx\n\t"
"int $0x80\n\t"
"popl %%ebx"
: "=a" (ret)
: "0" (90), /* SYS_mmap */
"g" (&args)
: "memory" );
if (ret < 0 && ret > -4096)
{
errno = -ret;
ret = -1;
}
return (void *)ret;
}
#endif
return mmap( addr, length, prot, flags, fd, offset );
}
/***********************************************************************
* map_file_into_view
*
* Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
* The csVirtual section must be held by caller.
*/
static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
off_t offset, BYTE vprot, BOOL removable )
{
void *ptr;
int prot = VIRTUAL_GetUnixProt( vprot );
BOOL shared_write = (vprot & VPROT_WRITE) != 0;
assert( start < view->size );
assert( start + size <= view->size );
/* only try mmap if media is not removable (or if we require write access) */
if (!removable || shared_write)
{
int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
goto done;
/* 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 FILE_GetNtStatus();
if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
}
/* Reserve the memory with an anonymous mmap */
ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
if (ptr == (void *)-1) return FILE_GetNtStatus();
/* Now read in the file */
pread( fd, ptr, size, offset );
if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
done:
memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
return STATUS_SUCCESS;
}
/***********************************************************************
* decommit_view
*
* Decommit some pages of a given view.
* The csVirtual section must be held by caller.
*/
static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
{
if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
{
BYTE *p = view->prot + (start >> page_shift);
size >>= page_shift;
while (size--) *p++ &= ~VPROT_COMMITTED;
return STATUS_SUCCESS;
}
return FILE_GetNtStatus();
}
/***********************************************************************
* do_relocations
*
* Apply the relocations to a mapped PE image
*/
static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
int delta, DWORD total_size )
{
IMAGE_BASE_RELOCATION *rel;
TRACE_(module)( "relocating from %p-%p to %p-%p\n",
base - delta, base - delta + total_size, base, base + total_size );
for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
{
char *page = base + rel->VirtualAddress;
WORD *TypeOffset = (WORD *)(rel + 1);
int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
if (!count) continue;
/* sanity checks */
if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
page > base + total_size)
{
ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
rel, rel->VirtualAddress, rel->SizeOfBlock,
base, dir->VirtualAddress, dir->Size );
return 0;
}
TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
/* patching in reverse order */
for (i = 0 ; i < count; i++)
{
int offset = TypeOffset[i] & 0xFFF;
int type = TypeOffset[i] >> 12;
switch(type)
{
case IMAGE_REL_BASED_ABSOLUTE:
break;
case IMAGE_REL_BASED_HIGH:
*(short*)(page+offset) += HIWORD(delta);
break;
case IMAGE_REL_BASED_LOW:
*(short*)(page+offset) += LOWORD(delta);
break;
case IMAGE_REL_BASED_HIGHLOW:
*(int*)(page+offset) += delta;
/* FIXME: if this is an exported address, fire up enhanced logic */
break;
default:
FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
break;
}
}
}
return 1;
}
/***********************************************************************
* map_image
*
* Map an executable (PE format) image into memory.
*/
static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
DWORD header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
{
IMAGE_DOS_HEADER *dos;
IMAGE_NT_HEADERS *nt;
IMAGE_SECTION_HEADER *sec;
IMAGE_DATA_DIRECTORY *imports;
NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
int i;
off_t pos;
struct file_view *view = NULL;
char *ptr;
/* zero-map the whole range */
RtlEnterCriticalSection( &csVirtual );
if (base >= (char *)0x110000) /* make sure the DOS area remains free */
status = map_view( &view, base, total_size,
VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
if (status == STATUS_CONFLICTING_ADDRESSES)
status = map_view( &view, NULL, total_size,
VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
if (status != STATUS_SUCCESS) goto error;
ptr = view->base;
TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
/* map the header */
status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
removable ) != STATUS_SUCCESS) 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;
}
/* 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, (int)pos, sec->SizeOfRawData,
size, sec->Characteristics );
if (map_file_into_view( view, shared_fd, sec->VirtualAddress, size, pos,
VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
FALSE ) != STATUS_SUCCESS)
{
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)
{
UINT_PTR base = imports->VirtualAddress & ~page_mask;
UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
if (end > base)
map_file_into_view( view, shared_fd, base, end - base,
pos + (base - sec->VirtualAddress),
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
FALSE );
}
pos += size;
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 );
if ((sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) &&
!(sec->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)) continue;
if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
/* Note: if the section is not aligned properly map_file_into_view will magically
* fall back to read(), so we don't need to check anything here.
*/
if (map_file_into_view( view, fd, sec->VirtualAddress, sec->SizeOfRawData, sec->PointerToRawData,
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
removable ) != STATUS_SUCCESS)
{
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 );
}
}
/* perform base relocation, if necessary */
if (ptr != base)
{
const IMAGE_DATA_DIRECTORY *relocs;
relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
if (!relocs->VirtualAddress || !relocs->Size)
{
if (nt->OptionalHeader.ImageBase == 0x400000) {
ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
ERR("Do you have exec-shield or prelink active?\n");
} else
ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
nt->OptionalHeader.ImageBase );
goto error;
}
/* FIXME: If we need to relocate a system DLL (base > 2GB) we should
* really make sure that the *new* base address is also > 2GB.
* Some DLLs really check the MSB of the module handle :-/
*/
if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
if (!do_relocations( ptr, relocs, ptr - base, total_size ))
{
goto error;
}
}
if (!removable) /* don't keep handle open on removable media */
NtDuplicateObject( GetCurrentProcess(), hmapping,
GetCurrentProcess(), &view->mapping,
0, 0, DUPLICATE_SAME_ACCESS );
/* set the image protections */
sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
{
DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
BYTE vprot = VPROT_COMMITTED;
if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
}
RtlLeaveCriticalSection( &csVirtual );
*addr_ptr = ptr;
return STATUS_SUCCESS;
error:
if (view) delete_view( view );
RtlLeaveCriticalSection( &csVirtual );
return status;
}
/***********************************************************************
* is_current_process
*
* Check whether a process handle is for the current process.
*/
BOOL is_current_process( HANDLE handle )
{
BOOL ret = FALSE;
if (handle == GetCurrentProcess()) return TRUE;
SERVER_START_REQ( get_process_info )
{
req->handle = handle;
if (!wine_server_call( req ))
ret = ((DWORD)reply->pid == GetCurrentProcessId());
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* virtual_init
*/
void virtual_init(void)
{
#ifndef page_mask
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;
BOOL ret = FALSE;
RtlEnterCriticalSection( &csVirtual );
if ((view = VIRTUAL_FindView( addr )))
{
view->handlerProc = proc;
view->handlerArg = arg;
ret = TRUE;
}
RtlLeaveCriticalSection( &csVirtual );
return ret;
}
/***********************************************************************
* VIRTUAL_HandleFault
*/
DWORD VIRTUAL_HandleFault( LPCVOID addr )
{
FILE_VIEW *view;
DWORD ret = EXCEPTION_ACCESS_VIOLATION;
RtlEnterCriticalSection( &csVirtual );
if ((view = VIRTUAL_FindView( addr )))
{
if (view->handlerProc)
{
HANDLERPROC proc = view->handlerProc;
void *arg = view->handlerArg;
RtlLeaveCriticalSection( &csVirtual );
if (proc( arg, addr )) ret = 0; /* handled */
return ret;
}
else
{
BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
void *page = (void *)((UINT_PTR)addr & ~page_mask);
char *stack = NtCurrentTeb()->Tib.StackLimit;
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 page? */
if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
ret = STATUS_STACK_OVERFLOW;
}
}
RtlLeaveCriticalSection( &csVirtual );
return ret;
}
/***********************************************************************
* VIRTUAL_HasMapping
*
* Check if the specified view has an associated file mapping.
*/
BOOL VIRTUAL_HasMapping( LPCVOID addr )
{
FILE_VIEW *view;
BOOL ret = FALSE;
RtlEnterCriticalSection( &csVirtual );
if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
RtlLeaveCriticalSection( &csVirtual );
return ret;
}
/***********************************************************************
* VIRTUAL_UseLargeAddressSpace
*
* Increase the address space size for apps that support it.
*/
void VIRTUAL_UseLargeAddressSpace(void)
{
if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
RtlEnterCriticalSection( &csVirtual );
remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
user_space_limit = ADDRESS_SPACE_LIMIT;
RtlLeaveCriticalSection( &csVirtual );
}
/***********************************************************************
* NtAllocateVirtualMemory (NTDLL.@)
* ZwAllocateVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, PVOID addr,
ULONG *size_ptr, ULONG type, ULONG protect )
{
void *base;
BYTE vprot;
DWORD size = *size_ptr;
NTSTATUS status = STATUS_SUCCESS;
struct file_view *view;
TRACE("%p %p %08lx %lx %08lx\n", process, addr, size, type, protect );
if (!size) return STATUS_INVALID_PARAMETER;
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
/* Round parameters to a page boundary */
if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
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;
/* disallow low 64k, wrap-around and kernel space */
if (((char *)base <= (char *)granularity_mask) ||
((char *)base + size < (char *)base) ||
is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
return STATUS_INVALID_PARAMETER;
}
else
{
base = NULL;
size = (size + page_mask) & ~page_mask;
}
if (type & MEM_TOP_DOWN) {
/* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
WARN("MEM_TOP_DOWN ignored\n");
type &= ~MEM_TOP_DOWN;
}
/* Compute the alloc type flags */
if (!(type & MEM_SYSTEM))
{
if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
{
WARN("called with wrong alloc type flags (%08lx) !\n", type);
return STATUS_INVALID_PARAMETER;
}
}
vprot = VIRTUAL_GetProt( protect );
if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
/* Reserve the memory */
RtlEnterCriticalSection( &csVirtual );
if (type & MEM_SYSTEM)
{
if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
if (status == STATUS_SUCCESS)
{
view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
base = view->base;
}
}
else if ((type & MEM_RESERVE) || !base)
{
status = map_view( &view, base, size, vprot );
if (status == STATUS_SUCCESS)
{
view->flags |= VFLAG_VALLOC;
base = view->base;
}
}
else /* commit the pages */
{
if (!(view = VIRTUAL_FindView( base )) ||
((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
}
RtlLeaveCriticalSection( &csVirtual );
if (status == STATUS_SUCCESS)
{
*ret = base;
*size_ptr = size;
}
return status;
}
/***********************************************************************
* NtFreeVirtualMemory (NTDLL.@)
* ZwFreeVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr, ULONG type )
{
FILE_VIEW *view;
char *base;
NTSTATUS status = STATUS_SUCCESS;
LPVOID addr = *addr_ptr;
DWORD size = *size_ptr;
TRACE("%p %p %08lx %lx\n", process, addr, size, type );
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
RtlEnterCriticalSection(&csVirtual);
if (!(view = VIRTUAL_FindView( base )) ||
(base + size > (char *)view->base + view->size) ||
!(view->flags & VFLAG_VALLOC))
{
status = STATUS_INVALID_PARAMETER;
}
else if (type & MEM_SYSTEM)
{
/* return the values that the caller should use to unmap the area */
*addr_ptr = view->base;
*size_ptr = view->size;
view->flags |= VFLAG_SYSTEM;
delete_view( view );
}
else if (type == MEM_RELEASE)
{
/* Free the pages */
if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
else
{
delete_view( view );
*addr_ptr = base;
*size_ptr = size;
}
}
else if (type == MEM_DECOMMIT)
{
status = decommit_pages( view, base - (char *)view->base, size );
if (status == STATUS_SUCCESS)
{
*addr_ptr = base;
*size_ptr = size;
}
}
else
{
WARN("called with wrong free type flags (%08lx) !\n", type);
status = STATUS_INVALID_PARAMETER;
}
RtlLeaveCriticalSection(&csVirtual);
return status;
}
/***********************************************************************
* NtProtectVirtualMemory (NTDLL.@)
* ZwProtectVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr,
ULONG new_prot, ULONG *old_prot )
{
FILE_VIEW *view;
NTSTATUS status = STATUS_SUCCESS;
char *base;
UINT i;
BYTE vprot, *p;
DWORD prot, size = *size_ptr;
LPVOID addr = *addr_ptr;
TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
RtlEnterCriticalSection( &csVirtual );
if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
{
status = STATUS_INVALID_PARAMETER;
}
else
{
/* 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))
{
status = STATUS_NOT_COMMITTED;
break;
}
}
if (!i)
{
if (old_prot) *old_prot = prot;
vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
}
}
RtlLeaveCriticalSection( &csVirtual );
if (status == STATUS_SUCCESS)
{
*addr_ptr = base;
*size_ptr = size;
}
return status;
}
/***********************************************************************
* NtQueryVirtualMemory (NTDLL.@)
* ZwQueryVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
ULONG len, ULONG *res_len )
{
FILE_VIEW *view;
char *base, *alloc_base = 0;
struct list *ptr;
UINT size = 0;
MEMORY_BASIC_INFORMATION *info = buffer;
if (info_class != MemoryBasicInformation) return STATUS_INVALID_INFO_CLASS;
if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
return STATUS_WORKING_SET_LIMIT_RANGE;
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
base = ROUND_ADDR( addr, page_mask );
/* Find the view containing the address */
RtlEnterCriticalSection(&csVirtual);
ptr = list_head( &views_list );
for (;;)
{
if (!ptr)
{
/* make the address space end at the user limit, except if
* the last view was mapped beyond that */
if (alloc_base < (char *)user_space_limit)
{
if (user_space_limit && base >= (char *)user_space_limit)
{
RtlLeaveCriticalSection( &csVirtual );
return STATUS_WORKING_SET_LIMIT_RANGE;
}
size = (char *)user_space_limit - alloc_base;
}
else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
view = NULL;
break;
}
view = LIST_ENTRY( ptr, struct file_view, entry );
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;
ptr = list_next( &views_list, ptr );
}
/* 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;
VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
else info->Type = MEM_MAPPED;
}
RtlLeaveCriticalSection(&csVirtual);
info->BaseAddress = (LPVOID)base;
info->AllocationBase = (LPVOID)alloc_base;
info->RegionSize = size - (base - alloc_base);
if (res_len) *res_len = sizeof(*info);
return STATUS_SUCCESS;
}
/***********************************************************************
* NtLockVirtualMemory (NTDLL.@)
* ZwLockVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
{
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtUnlockVirtualMemory (NTDLL.@)
* ZwUnlockVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
{
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtCreateSection (NTDLL.@)
* ZwCreateSection (NTDLL.@)
*/
NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
const LARGE_INTEGER *size, ULONG protect,
ULONG sec_flags, HANDLE file )
{
NTSTATUS ret;
BYTE vprot;
DWORD len = attr->ObjectName ? attr->ObjectName->Length : 0;
/* Check parameters */
if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
vprot = VIRTUAL_GetProt( protect );
if (sec_flags & SEC_RESERVE)
{
if (file) return STATUS_INVALID_PARAMETER;
}
else vprot |= VPROT_COMMITTED;
if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
/* Create the server object */
SERVER_START_REQ( create_mapping )
{
req->file_handle = file;
req->size_high = size ? size->u.HighPart : 0;
req->size_low = size ? size->u.LowPart : 0;
req->protect = vprot;
req->access = access;
req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
ret = wine_server_call( req );
*handle = reply->handle;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* NtOpenSection (NTDLL.@)
* ZwOpenSection (NTDLL.@)
*/
NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
{
NTSTATUS ret;
DWORD len = attr->ObjectName->Length;
if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
SERVER_START_REQ( open_mapping )
{
req->access = access;
req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
wine_server_add_data( req, attr->ObjectName->Buffer, len );
if (!(ret = wine_server_call( req ))) *handle = reply->handle;
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* NtMapViewOfSection (NTDLL.@)
* ZwMapViewOfSection (NTDLL.@)
*/
NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
ULONG commit_size, const LARGE_INTEGER *offset, ULONG *size_ptr,
SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
{
IO_STATUS_BLOCK io;
FILE_FS_DEVICE_INFORMATION device_info;
NTSTATUS res;
UINT size = 0;
int unix_handle = -1;
int prot;
void *base;
struct file_view *view;
DWORD size_low, size_high, header_size, shared_size;
HANDLE shared_file;
BOOL removable = FALSE;
TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%x access=%lx\n",
handle, process, *addr_ptr, offset->u.HighPart, offset->u.LowPart, size, protect );
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
/* Check parameters */
if ((offset->u.LowPart & granularity_mask) ||
(*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
return STATUS_INVALID_PARAMETER;
SERVER_START_REQ( get_mapping_info )
{
req->handle = handle;
res = wine_server_call( 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;
}
SERVER_END_REQ;
if (res) return res;
if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
if (NtQueryVolumeInformationFile( handle, &io, &device_info, sizeof(device_info),
FileFsDeviceInformation ) == STATUS_SUCCESS)
removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
if (prot & VPROT_IMAGE)
{
if (shared_file)
{
int shared_fd;
if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
NULL ))) goto done;
res = map_image( handle, unix_handle, base, size_low, header_size,
shared_fd, removable, addr_ptr );
wine_server_release_fd( shared_file, shared_fd );
NtClose( shared_file );
}
else
{
res = map_image( handle, unix_handle, base, size_low, header_size,
-1, removable, addr_ptr );
}
wine_server_release_fd( handle, unix_handle );
if (!res) *size_ptr = size_low;
return res;
}
if (size_high)
ERR("Sizes larger than 4Gb not supported\n");
if ((offset->u.LowPart >= size_low) ||
(*size_ptr > size_low - offset->u.LowPart))
{
res = STATUS_INVALID_PARAMETER;
goto done;
}
if (*size_ptr) size = ROUND_SIZE( offset->u.LowPart, *size_ptr );
else size = size_low - offset->u.LowPart;
switch(protect)
{
case PAGE_NOACCESS:
break;
case PAGE_READWRITE:
case PAGE_EXECUTE_READWRITE:
if (!(prot & VPROT_WRITE))
{
res = STATUS_INVALID_PARAMETER;
goto done;
}
removable = FALSE;
/* fall through */
case PAGE_READONLY:
case PAGE_WRITECOPY:
case PAGE_EXECUTE:
case PAGE_EXECUTE_READ:
case PAGE_EXECUTE_WRITECOPY:
if (prot & VPROT_READ) break;
/* fall through */
default:
res = STATUS_INVALID_PARAMETER;
goto done;
}
/* 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 */
RtlEnterCriticalSection( &csVirtual );
res = map_view( &view, *addr_ptr, size, prot );
if (res)
{
RtlLeaveCriticalSection( &csVirtual );
goto done;
}
/* Map the file */
TRACE("handle=%p size=%x offset=%lx%08lx\n",
handle, size, offset->u.HighPart, offset->u.LowPart );
res = map_file_into_view( view, unix_handle, 0, size, offset->QuadPart, prot, removable );
if (res == STATUS_SUCCESS)
{
if (!removable) /* don't keep handle open on removable media */
NtDuplicateObject( GetCurrentProcess(), handle,
GetCurrentProcess(), &view->mapping,
0, 0, DUPLICATE_SAME_ACCESS );
*addr_ptr = view->base;
*size_ptr = size;
}
else
{
ERR( "map_file_into_view %p %x %lx%08lx failed\n",
view->base, size, offset->u.HighPart, offset->u.LowPart );
delete_view( view );
}
RtlLeaveCriticalSection( &csVirtual );
done:
wine_server_release_fd( handle, unix_handle );
return res;
}
/***********************************************************************
* NtUnmapViewOfSection (NTDLL.@)
* ZwUnmapViewOfSection (NTDLL.@)
*/
NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
{
FILE_VIEW *view;
NTSTATUS status = STATUS_INVALID_PARAMETER;
void *base = ROUND_ADDR( addr, page_mask );
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
RtlEnterCriticalSection( &csVirtual );
if ((view = VIRTUAL_FindView( base )) && (base == view->base))
{
delete_view( view );
status = STATUS_SUCCESS;
}
RtlLeaveCriticalSection( &csVirtual );
return status;
}
/***********************************************************************
* NtFlushVirtualMemory (NTDLL.@)
* ZwFlushVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
ULONG *size_ptr, ULONG unknown )
{
FILE_VIEW *view;
NTSTATUS status = STATUS_SUCCESS;
void *addr = ROUND_ADDR( *addr_ptr, page_mask );
if (!is_current_process( process ))
{
ERR("Unsupported on other process\n");
return STATUS_ACCESS_DENIED;
}
RtlEnterCriticalSection( &csVirtual );
if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
else
{
if (!*size_ptr) *size_ptr = view->size;
*addr_ptr = addr;
if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
}
RtlLeaveCriticalSection( &csVirtual );
return status;
}
/***********************************************************************
* NtReadVirtualMemory (NTDLL.@)
* ZwReadVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
SIZE_T size, SIZE_T *bytes_read )
{
NTSTATUS status;
SERVER_START_REQ( read_process_memory )
{
req->handle = process;
req->addr = (void *)addr;
wine_server_set_reply( req, buffer, size );
if ((status = wine_server_call( req ))) size = 0;
}
SERVER_END_REQ;
if (bytes_read) *bytes_read = size;
return status;
}
/***********************************************************************
* NtWriteVirtualMemory (NTDLL.@)
* ZwWriteVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
SIZE_T size, SIZE_T *bytes_written )
{
static const unsigned int zero;
unsigned int first_offset, last_offset, first_mask, last_mask;
NTSTATUS status;
if (!size) return STATUS_INVALID_PARAMETER;
/* compute the mask for the first int */
first_mask = ~0;
first_offset = (unsigned int)addr % sizeof(int);
memset( &first_mask, 0, first_offset );
/* compute the mask for the last int */
last_offset = (size + first_offset) % sizeof(int);
last_mask = 0;
memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
SERVER_START_REQ( write_process_memory )
{
req->handle = process;
req->addr = (char *)addr - first_offset;
req->first_mask = first_mask;
req->last_mask = last_mask;
if (first_offset) wine_server_add_data( req, &zero, first_offset );
wine_server_add_data( req, buffer, size );
if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
if ((status = wine_server_call( req ))) size = 0;
}
SERVER_END_REQ;
if (bytes_written) *bytes_written = size;
return status;
}