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wine/dlls/ntdll/virtual.c
Andrew Talbot e3708a60b4 ntdll: Constify some variables.
2007-06-28 11:00:53 +02:00

2216 lines
73 KiB
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/*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.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 */
size_t size; /* Size in bytes */
HANDLE mapping; /* Handle to the file mapping */
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 RTL_CRITICAL_SECTION csVirtual;
static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &csVirtual,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
};
static RTL_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 *)0x7fff0000) /* top of the user address space */
#else
static UINT page_shift;
static UINT page_size;
static UINT_PTR page_mask;
# 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 ROUND_ADDR(addr,mask) \
((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
#define ROUND_SIZE(addr,size) \
(((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
#define VIRTUAL_DEBUG_DUMP_VIEW(view) \
do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
static void *user_space_limit = USER_SPACE_LIMIT;
static void *preload_reserve_start;
static void *preload_reserve_end;
static int use_locks;
static int force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
/***********************************************************************
* 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_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;
}
if (!prot) prot = PROT_NONE;
return prot;
}
/***********************************************************************
* VIRTUAL_DumpView
*/
static void VIRTUAL_DumpView( FILE_VIEW *view )
{
UINT i, count;
char *addr = view->base;
BYTE prot = view->prot[0];
TRACE( "View: %p - %p", addr, addr + view->size - 1 );
if (view->flags & VFLAG_SYSTEM)
TRACE( " (system)\n" );
else if (view->flags & VFLAG_VALLOC)
TRACE( " (valloc)\n" );
else if (view->mapping)
TRACE( " %p\n", view->mapping );
else
TRACE( " (anonymous)\n");
for (count = i = 1; i < view->size >> page_shift; i++, count++)
{
if (view->prot[i] == prot) continue;
TRACE( " %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)
TRACE( " %p - %p %s\n",
addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
}
/***********************************************************************
* VIRTUAL_Dump
*/
#if WINE_VM_DEBUG
static void VIRTUAL_Dump(void)
{
sigset_t sigset;
struct file_view *view;
TRACE( "Dump of all virtual memory views:\n" );
server_enter_uninterrupted_section( &csVirtual, &sigset );
LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
{
VIRTUAL_DumpView( view );
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
}
#endif
/***********************************************************************
* VIRTUAL_FindView
*
* Find the view containing a given address. The csVirtual section must be held by caller.
*
* PARAMS
* addr [I] Address
*
* RETURNS
* View: Success
* NULL: Failure
*/
static struct file_view *VIRTUAL_FindView( const void *addr )
{
struct file_view *view;
LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
{
if (view->base > addr) break;
if ((const char*)view->base + view->size > (const char*)addr) return view;
}
return NULL;
}
/***********************************************************************
* get_mask
*/
static inline UINT_PTR get_mask( ULONG zero_bits )
{
if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
if (zero_bits < page_shift) zero_bits = page_shift;
return (1 << zero_bits) - 1;
}
/***********************************************************************
* 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 file_view *view;
LIST_FOR_EACH_ENTRY( view, &views_list, 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;
}
/***********************************************************************
* find_free_area
*
* Find a free area between views inside the specified range.
* The csVirtual section must be held by caller.
*/
static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
{
struct list *ptr;
void *start;
if (top_down)
{
start = ROUND_ADDR( (char *)end - size, mask );
if (start >= end || start < base) return NULL;
for (ptr = views_list.prev; ptr != &views_list; ptr = ptr->prev)
{
struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
if ((char *)view->base + view->size <= (char *)start) break;
if ((char *)view->base >= (char *)start + size) continue;
start = ROUND_ADDR( (char *)view->base - size, mask );
/* stop if remaining space is not large enough */
if (!start || start >= end || start < base) return NULL;
}
}
else
{
start = ROUND_ADDR( (char *)base + mask, mask );
if (start >= end || (char *)end - (char *)start < size) return NULL;
for (ptr = views_list.next; ptr != &views_list; ptr = ptr->next)
{
struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
if ((char *)view->base >= (char *)start + size) break;
if ((char *)view->base + view->size <= (char *)start) continue;
start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
/* stop if remaining space is not large enough */
if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
}
}
return start;
}
/***********************************************************************
* 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 );
}
/***********************************************************************
* is_beyond_limit
*
* Check if an address range goes beyond a given limit.
*/
static inline int is_beyond_limit( const void *addr, size_t size, const void *limit )
{
return (limit && (addr >= limit || (const char *)addr + size > (const 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 if (is_beyond_limit( addr, size, user_space_limit ))
add_reserved_area( addr, size );
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;
int unix_prot = VIRTUAL_GetUnixProt( vprot );
assert( !((UINT_PTR)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;
memset( view->prot, vprot & ~VPROT_IMAGE, 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 );
if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
{
TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
mprotect( base, size, unix_prot | PROT_EXEC );
}
return STATUS_SUCCESS;
}
/***********************************************************************
* VIRTUAL_GetWin32Prot
*
* Convert page protections to Win32 flags.
*/
static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
{
DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
return ret;
}
/***********************************************************************
* VIRTUAL_GetProt
*
* Build page protections from Win32 flags.
*
* PARAMS
* protect [I] Win32 protection flags
*
* RETURNS
* Value of page protection flags
*/
static BYTE VIRTUAL_GetProt( DWORD protect )
{
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 */
size_t size, /* [in] Size in bytes */
BYTE vprot ) /* [in] Protections to use */
{
int unix_prot = VIRTUAL_GetUnixProt(vprot);
TRACE("%p-%p %s\n",
base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
{
TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
if (!mprotect( base, size, unix_prot | PROT_EXEC )) goto done;
/* exec + write may legitimately fail, in that case fall back to write only */
if (!(unix_prot & PROT_WRITE)) return FALSE;
}
if (mprotect( base, size, unix_prot )) return FALSE; /* FIXME: last error */
done:
memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
vprot, size >> page_shift );
VIRTUAL_DEBUG_DUMP_VIEW( view );
return TRUE;
}
/***********************************************************************
* unmap_extra_space
*
* Release the extra memory while keeping the range starting on the granularity boundary.
*/
static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
{
if ((ULONG_PTR)ptr & mask)
{
size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
munmap( ptr, extra );
ptr = (char *)ptr + extra;
total_size -= extra;
}
if (total_size > wanted_size)
munmap( (char *)ptr + wanted_size, total_size - wanted_size );
return ptr;
}
struct alloc_area
{
size_t size;
size_t mask;
int top_down;
void *result;
};
/***********************************************************************
* alloc_reserved_area_callback
*
* Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
*/
static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
{
static void * const address_space_start = (void *)0x110000;
struct alloc_area *alloc = arg;
void *end = (char *)start + size;
if (start < address_space_start) start = address_space_start;
if (user_space_limit && end > user_space_limit) end = user_space_limit;
if (start >= end) return 0;
/* make sure we don't touch the preloader reserved range */
if (preload_reserve_end >= start)
{
if (preload_reserve_end >= end)
{
if (preload_reserve_start <= start) return 0; /* no space in that area */
if (preload_reserve_start < end) end = preload_reserve_start;
}
else if (preload_reserve_start <= start) start = preload_reserve_end;
else
{
/* range is split in two by the preloader reservation, try first part */
if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
alloc->mask, alloc->top_down )))
return 1;
/* then fall through to try second part */
start = preload_reserve_end;
}
}
if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
return 1;
return 0;
}
/***********************************************************************
* 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, size_t mask,
int top_down, 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 + mask + 1;
struct alloc_area alloc;
alloc.size = size;
alloc.mask = mask;
alloc.top_down = top_down;
if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
{
ptr = alloc.result;
TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
return STATUS_INVALID_PARAMETER;
goto done;
}
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;
}
TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
/* 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;
}
ptr = unmap_extra_space( ptr, view_size, size, mask );
}
done:
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 */
"q" (&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, ROUND_SIZE(start,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, SIZE_T 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)
{
ERR_(module)("invalid relocation %p,%x,%d at %p,%x,%x\n",
rel, rel->VirtualAddress, rel->SizeOfBlock,
base, dir->VirtualAddress, dir->Size );
return 0;
}
if (page > base + total_size)
{
WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
count, page, base, base + total_size );
continue;
}
TRACE_(module)("%d relocations for page %x\n", count, 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, SIZE_T total_size, SIZE_T mask,
SIZE_T header_size, int shared_fd, HANDLE dup_mapping, 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;
sigset_t sigset;
struct stat st;
struct file_view *view = NULL;
char *ptr, *header_end;
/* zero-map the whole range */
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (base >= (char *)0x110000) /* make sure the DOS area remains free */
status = map_view( &view, base, total_size, mask, FALSE,
VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
if (status == STATUS_CONFLICTING_ADDRESSES)
status = map_view( &view, NULL, total_size, mask, FALSE,
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 */
if (fstat( fd, &st ) == -1)
{
status = FILE_GetNtStatus();
goto error;
}
status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
if (!st.st_size) goto error;
header_size = min( header_size, st.st_size );
if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
!dup_mapping ) != STATUS_SUCCESS) goto error;
dos = (IMAGE_DOS_HEADER *)ptr;
nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
header_end = ptr + ROUND_SIZE( 0, header_size );
memset( ptr + header_size, 0, header_end - (ptr + header_size) );
if ((char *)(nt + 1) > header_end) goto error;
sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) 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;
case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
}
MESSAGE(")\n");
goto error;
}
/* check for non page-aligned binary */
if (nt->OptionalHeader.SectionAlignment <= page_mask)
{
/* unaligned sections, this happens for native subsystem binaries */
/* in that case Windows simply maps in the whole file */
if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
!dup_mapping ) != STATUS_SUCCESS) goto error;
/* check that all sections are loaded at the right offset */
if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
{
if (sec[i].VirtualAddress != sec[i].PointerToRawData)
goto error; /* Windows refuses to load in that case too */
}
/* set the image protections */
VIRTUAL_SetProt( view, ptr, total_size,
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
/* perform relocations if necessary */
/* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
if (ptr != base)
{
const IMAGE_DATA_DIRECTORY *relocs;
relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
if (relocs->VirtualAddress && relocs->Size)
do_relocations( ptr, relocs, ptr - base, total_size );
}
goto done;
}
/* map all the sections */
for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
{
static const SIZE_T sector_align = 0x1ff;
SIZE_T map_size, file_start, file_size, end;
if (!sec->Misc.VirtualSize)
map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
else
map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
/* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
file_start = sec->PointerToRawData & ~sector_align;
file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
if (file_size > map_size) file_size = map_size;
/* a few sanity checks */
end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
{
WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
sec->Name, sec->VirtualAddress, map_size, total_size );
goto error;
}
if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
(sec->Characteristics & IMAGE_SCN_MEM_WRITE))
{
TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
sec->Name, ptr + sec->VirtualAddress,
sec->PointerToRawData, (int)pos, file_size, map_size,
sec->Characteristics );
if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
VPROT_COMMITTED | VPROT_READ | VPROT_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 + map_size)
{
UINT_PTR base = imports->VirtualAddress & ~page_mask;
UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_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 += map_size;
continue;
}
TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
sec->Name, ptr + sec->VirtualAddress,
sec->PointerToRawData, sec->SizeOfRawData,
sec->Misc.VirtualSize, sec->Characteristics );
if (!sec->PointerToRawData || !file_size) 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.
*/
end = file_start + file_size;
if (sec->PointerToRawData >= st.st_size ||
end > ((st.st_size + sector_align) & ~sector_align) ||
end < file_start ||
map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
!dup_mapping ) != STATUS_SUCCESS)
{
ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
goto error;
}
if (file_size & page_mask)
{
end = ROUND_SIZE( 0, file_size );
if (end > map_size) end = map_size;
TRACE_(module)("clearing %p - %p\n",
ptr + sec->VirtualAddress + file_size,
ptr + sec->VirtualAddress + end );
memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
}
}
/* perform base relocation, if necessary */
if (ptr != base)
{
const IMAGE_DATA_DIRECTORY *relocs;
relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
{
WARN( "Need to relocate module from addr %lx, but there are no relocation records\n",
(ULONG_PTR)nt->OptionalHeader.ImageBase );
status = STATUS_CONFLICTING_ADDRESSES;
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) && !((ULONG_PTR)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;
}
}
/* set the image protections */
VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
{
SIZE_T size;
BYTE vprot = VPROT_COMMITTED;
if (sec->Misc.VirtualSize)
size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
else
size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
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;
/* Dumb game crack lets the AOEP point into a data section. Adjust. */
if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
(nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
vprot |= VPROT_EXEC;
VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
}
done:
view->mapping = dup_mapping;
server_leave_uninterrupted_section( &csVirtual, &sigset );
*addr_ptr = ptr;
return STATUS_SUCCESS;
error:
if (view) delete_view( view );
server_leave_uninterrupted_section( &csVirtual, &sigset );
if (dup_mapping) NtClose( dup_mapping );
return status;
}
/***********************************************************************
* virtual_init
*/
void virtual_init(void)
{
const char *preload;
#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 */
if ((preload = getenv("WINEPRELOADRESERVE")))
{
unsigned long start, end;
if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
{
preload_reserve_start = (void *)start;
preload_reserve_end = (void *)end;
}
}
}
/***********************************************************************
* virtual_init_threading
*/
void virtual_init_threading(void)
{
use_locks = 1;
}
/***********************************************************************
* VIRTUAL_HandleFault
*/
NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
{
FILE_VIEW *view;
NTSTATUS ret = STATUS_ACCESS_VIOLATION;
sigset_t sigset;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((view = VIRTUAL_FindView( addr )))
{
void *page = ROUND_ADDR( addr, page_mask );
BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
if (vprot & VPROT_GUARD)
{
VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
ret = STATUS_GUARD_PAGE_VIOLATION;
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return ret;
}
/***********************************************************************
* VIRTUAL_SetForceExec
*
* Whether to force exec prot on all views.
*/
void VIRTUAL_SetForceExec( BOOL enable )
{
struct file_view *view;
sigset_t sigset;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!force_exec_prot != !enable) /* change all existing views */
{
force_exec_prot = enable;
LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
{
UINT i, count;
int unix_prot;
char *addr = view->base;
BYTE prot = view->prot[0];
for (count = i = 1; i < view->size >> page_shift; i++, count++)
{
if (view->prot[i] == prot) continue;
unix_prot = VIRTUAL_GetUnixProt( prot );
if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
{
TRACE( "%s exec prot for %p-%p\n",
force_exec_prot ? "enabling" : "disabling",
addr, addr + (count << page_shift) - 1 );
mprotect( addr, count << page_shift,
unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
}
addr += (count << page_shift);
prot = view->prot[i];
count = 0;
}
if (count)
{
unix_prot = VIRTUAL_GetUnixProt( prot );
if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
{
TRACE( "%s exec prot for %p-%p\n",
force_exec_prot ? "enabling" : "disabling",
addr, addr + (count << page_shift) - 1 );
mprotect( addr, count << page_shift,
unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
}
}
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
}
/***********************************************************************
* VIRTUAL_UseLargeAddressSpace
*
* Increase the address space size for apps that support it.
*/
void VIRTUAL_UseLargeAddressSpace(void)
{
/* no large address space on win9x */
if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
user_space_limit = ADDRESS_SPACE_LIMIT;
}
/***********************************************************************
* NtAllocateVirtualMemory (NTDLL.@)
* ZwAllocateVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
SIZE_T *size_ptr, ULONG type, ULONG protect )
{
void *base;
BYTE vprot;
SIZE_T size = *size_ptr;
SIZE_T mask = get_mask( zero_bits );
NTSTATUS status = STATUS_SUCCESS;
struct file_view *view;
sigset_t sigset;
TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
if (!size) return STATUS_INVALID_PARAMETER;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
call.virtual_alloc.addr = *ret;
call.virtual_alloc.size = *size_ptr;
call.virtual_alloc.zero_bits = zero_bits;
call.virtual_alloc.op_type = type;
call.virtual_alloc.prot = protect;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_alloc.status == STATUS_SUCCESS)
{
*ret = result.virtual_alloc.addr;
*size_ptr = result.virtual_alloc.size;
}
return result.virtual_alloc.status;
}
/* Round parameters to a page boundary */
if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
if (*ret)
{
if (type & MEM_RESERVE) /* Round down to 64k boundary */
base = ROUND_ADDR( *ret, mask );
else
base = ROUND_ADDR( *ret, page_mask );
size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
/* disallow low 64k, wrap-around and kernel space */
if (((char *)base < (char *)0x10000) ||
((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;
}
/* Compute the alloc type flags */
if (!(type & MEM_SYSTEM))
{
if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
(type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
{
WARN("called with wrong alloc type flags (%08x) !\n", type);
return STATUS_INVALID_PARAMETER;
}
if (type & MEM_WRITE_WATCH)
{
FIXME("MEM_WRITE_WATCH type not supported\n");
return STATUS_NOT_SUPPORTED;
}
}
vprot = VIRTUAL_GetProt( protect );
if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
/* Reserve the memory */
if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
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, mask, type & MEM_TOP_DOWN, 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;
}
if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
if (status == STATUS_SUCCESS)
{
*ret = base;
*size_ptr = size;
}
return status;
}
/***********************************************************************
* NtFreeVirtualMemory (NTDLL.@)
* ZwFreeVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
{
FILE_VIEW *view;
char *base;
sigset_t sigset;
NTSTATUS status = STATUS_SUCCESS;
LPVOID addr = *addr_ptr;
SIZE_T size = *size_ptr;
TRACE("%p %p %08lx %x\n", process, addr, size, type );
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_free.type = APC_VIRTUAL_FREE;
call.virtual_free.addr = addr;
call.virtual_free.size = size;
call.virtual_free.op_type = type;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_free.status == STATUS_SUCCESS)
{
*addr_ptr = result.virtual_free.addr;
*size_ptr = result.virtual_free.size;
}
return result.virtual_free.status;
}
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
/* avoid freeing the DOS area when a broken app passes a NULL pointer */
if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
server_enter_uninterrupted_section( &csVirtual, &sigset );
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;
if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
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 (%08x) !\n", type);
status = STATUS_INVALID_PARAMETER;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* NtProtectVirtualMemory (NTDLL.@)
* ZwProtectVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
ULONG new_prot, ULONG *old_prot )
{
FILE_VIEW *view;
sigset_t sigset;
NTSTATUS status = STATUS_SUCCESS;
char *base;
UINT i;
BYTE vprot, *p;
ULONG prot;
SIZE_T size = *size_ptr;
LPVOID addr = *addr_ptr;
TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_protect.type = APC_VIRTUAL_PROTECT;
call.virtual_protect.addr = addr;
call.virtual_protect.size = size;
call.virtual_protect.prot = new_prot;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_protect.status == STATUS_SUCCESS)
{
*addr_ptr = result.virtual_protect.addr;
*size_ptr = result.virtual_protect.size;
if (old_prot) *old_prot = result.virtual_protect.prot;
}
return result.virtual_protect.status;
}
/* Fix the parameters */
size = ROUND_SIZE( addr, size );
base = ROUND_ADDR( addr, page_mask );
server_enter_uninterrupted_section( &csVirtual, &sigset );
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);
prot = VIRTUAL_GetWin32Prot( *p );
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;
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
if (status == STATUS_SUCCESS)
{
*addr_ptr = base;
*size_ptr = size;
}
return status;
}
#define UNIMPLEMENTED_INFO_CLASS(c) \
case c: \
FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
return STATUS_INVALID_INFO_CLASS
/***********************************************************************
* NtQueryVirtualMemory (NTDLL.@)
* ZwQueryVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
SIZE_T len, SIZE_T *res_len )
{
FILE_VIEW *view;
char *base, *alloc_base = 0;
struct list *ptr;
SIZE_T size = 0;
MEMORY_BASIC_INFORMATION *info = buffer;
sigset_t sigset;
if (info_class != MemoryBasicInformation)
{
switch(info_class)
{
UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
default:
FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
process, addr, info_class, buffer, len, res_len);
return STATUS_INVALID_INFO_CLASS;
}
}
if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
return STATUS_WORKING_SET_LIMIT_RANGE;
if (process != NtCurrentProcess())
{
NTSTATUS status;
apc_call_t call;
apc_result_t result;
call.virtual_query.type = APC_VIRTUAL_QUERY;
call.virtual_query.addr = addr;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_query.status == STATUS_SUCCESS)
{
info->BaseAddress = result.virtual_query.base;
info->AllocationBase = result.virtual_query.alloc_base;
info->RegionSize = result.virtual_query.size;
info->State = result.virtual_query.state;
info->Protect = result.virtual_query.prot;
info->AllocationProtect = result.virtual_query.alloc_prot;
info->Type = result.virtual_query.alloc_type;
if (res_len) *res_len = sizeof(*info);
}
return result.virtual_query.status;
}
base = ROUND_ADDR( addr, page_mask );
/* Find the view containing the address */
server_enter_uninterrupted_section( &csVirtual, &sigset );
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)
{
server_leave_uninterrupted_section( &csVirtual, &sigset );
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 = PAGE_NOACCESS;
info->AllocationBase = 0;
info->AllocationProtect = 0;
info->Type = 0;
}
else
{
BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
info->Protect = VIRTUAL_GetWin32Prot( vprot );
info->AllocationBase = alloc_base;
info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
else info->Type = MEM_MAPPED;
for (size = base - alloc_base; size < view->size; size += page_size)
if (view->prot[size >> page_shift] != vprot) break;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
info->BaseAddress = 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, SIZE_T *size, ULONG unknown )
{
NTSTATUS status = STATUS_SUCCESS;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_lock.type = APC_VIRTUAL_LOCK;
call.virtual_lock.addr = *addr;
call.virtual_lock.size = *size;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_lock.status == STATUS_SUCCESS)
{
*addr = result.virtual_lock.addr;
*size = result.virtual_lock.size;
}
return result.virtual_lock.status;
}
*size = ROUND_SIZE( *addr, *size );
*addr = ROUND_ADDR( *addr, page_mask );
if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
return status;
}
/***********************************************************************
* NtUnlockVirtualMemory (NTDLL.@)
* ZwUnlockVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
{
NTSTATUS status = STATUS_SUCCESS;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
call.virtual_unlock.addr = *addr;
call.virtual_unlock.size = *size;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_unlock.status == STATUS_SUCCESS)
{
*addr = result.virtual_unlock.addr;
*size = result.virtual_unlock.size;
}
return result.virtual_unlock.status;
}
*size = ROUND_SIZE( *addr, *size );
*addr = ROUND_ADDR( *addr, page_mask );
if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
return status;
}
/***********************************************************************
* 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 && 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->access = access;
req->attributes = (attr) ? attr->Attributes : 0;
req->rootdir = attr ? attr->RootDirectory : 0;
req->file_handle = file;
req->size_high = size ? size->u.HighPart : 0;
req->size_low = size ? size->u.LowPart : 0;
req->protect = vprot;
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->attributes = (attr) ? attr->Attributes : 0;
req->rootdir = attr ? attr->RootDirectory : 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,
SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
{
NTSTATUS res;
SIZE_T size = 0;
SIZE_T mask = get_mask( zero_bits );
int unix_handle = -1, needs_close;
int prot;
void *base;
struct file_view *view;
DWORD size_low, size_high, header_size, shared_size;
HANDLE dup_mapping, shared_file;
LARGE_INTEGER offset;
sigset_t sigset;
offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
/* Check parameters */
if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
return STATUS_INVALID_PARAMETER;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.map_view.type = APC_MAP_VIEW;
call.map_view.handle = handle;
call.map_view.addr = *addr_ptr;
call.map_view.size = *size_ptr;
call.map_view.offset_low = offset.u.LowPart;
call.map_view.offset_high = offset.u.HighPart;
call.map_view.zero_bits = zero_bits;
call.map_view.alloc_type = alloc_type;
call.map_view.prot = protect;
res = NTDLL_queue_process_apc( process, &call, &result );
if (res != STATUS_SUCCESS) return res;
if (result.map_view.status == STATUS_SUCCESS)
{
*addr_ptr = result.map_view.addr;
*size_ptr = result.map_view.size;
}
return result.map_view.status;
}
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;
dup_mapping = reply->mapping;
shared_file = reply->shared_file;
shared_size = reply->shared_size;
}
SERVER_END_REQ;
if (res) return res;
size = ((ULONGLONG)size_high << 32) | size_low;
if (sizeof(size) == sizeof(size_low) && size_high)
ERR( "Sizes larger than 4Gb (%x%08x) not supported on this platform\n", size_high, size_low );
if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
if (prot & VPROT_IMAGE)
{
if (shared_file)
{
int shared_fd, shared_needs_close;
if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
&shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
res = map_image( handle, unix_handle, base, size, mask, header_size,
shared_fd, dup_mapping, addr_ptr );
if (shared_needs_close) close( shared_fd );
NtClose( shared_file );
}
else
{
res = map_image( handle, unix_handle, base, size, mask, header_size,
-1, dup_mapping, addr_ptr );
}
if (needs_close) close( unix_handle );
if (!res) *size_ptr = size;
return res;
}
if ((offset.QuadPart >= size) || (*size_ptr > size - offset.QuadPart))
{
res = STATUS_INVALID_PARAMETER;
goto done;
}
if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
else size = size - offset.QuadPart;
switch(protect)
{
case PAGE_NOACCESS:
break;
case PAGE_READWRITE:
case PAGE_EXECUTE_READWRITE:
if (!(prot & VPROT_WRITE))
{
res = STATUS_INVALID_PARAMETER;
goto done;
}
/* 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 committed in all other processes, which have the same
* view created. Since we don't support this yet, we create the
* whole mapping committed.
*/
prot |= VPROT_COMMITTED;
/* Reserve a properly aligned area */
server_enter_uninterrupted_section( &csVirtual, &sigset );
res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
if (res)
{
server_leave_uninterrupted_section( &csVirtual, &sigset );
goto done;
}
/* Map the file */
TRACE("handle=%p size=%lx offset=%x%08x\n",
handle, size, offset.u.HighPart, offset.u.LowPart );
res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, !dup_mapping );
if (res == STATUS_SUCCESS)
{
*addr_ptr = view->base;
*size_ptr = size;
view->mapping = dup_mapping;
dup_mapping = 0; /* don't close it */
}
else
{
ERR( "map_file_into_view %p %lx %x%08x failed\n",
view->base, size, offset.u.HighPart, offset.u.LowPart );
delete_view( view );
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
done:
if (dup_mapping) NtClose( dup_mapping );
if (needs_close) close( unix_handle );
return res;
}
/***********************************************************************
* NtUnmapViewOfSection (NTDLL.@)
* ZwUnmapViewOfSection (NTDLL.@)
*/
NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
{
FILE_VIEW *view;
NTSTATUS status = STATUS_INVALID_PARAMETER;
sigset_t sigset;
void *base = ROUND_ADDR( addr, page_mask );
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.unmap_view.type = APC_UNMAP_VIEW;
call.unmap_view.addr = addr;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status == STATUS_SUCCESS) status = result.unmap_view.status;
return status;
}
server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((view = VIRTUAL_FindView( base )) && (base == view->base))
{
delete_view( view );
status = STATUS_SUCCESS;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* NtFlushVirtualMemory (NTDLL.@)
* ZwFlushVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
SIZE_T *size_ptr, ULONG unknown )
{
FILE_VIEW *view;
NTSTATUS status = STATUS_SUCCESS;
sigset_t sigset;
void *addr = ROUND_ADDR( *addr_ptr, page_mask );
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
call.virtual_flush.type = APC_VIRTUAL_FLUSH;
call.virtual_flush.addr = addr;
call.virtual_flush.size = *size_ptr;
status = NTDLL_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_flush.status == STATUS_SUCCESS)
{
*addr_ptr = result.virtual_flush.addr;
*size_ptr = result.virtual_flush.size;
}
return result.virtual_flush.status;
}
server_enter_uninterrupted_section( &csVirtual, &sigset );
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;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
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 )
{
NTSTATUS status;
SERVER_START_REQ( write_process_memory )
{
req->handle = process;
req->addr = addr;
wine_server_add_data( req, buffer, size );
if ((status = wine_server_call( req ))) size = 0;
}
SERVER_END_REQ;
if (bytes_written) *bytes_written = size;
return status;
}
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