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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>
#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_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#ifdef HAVE_SYS_SYSINFO_H
# include <sys/sysinfo.h>
#endif
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#define NONAMELESSUNION
#include "windef.h"
#include "winternl.h"
#include "wine/library.h"
#include "wine/server.h"
#include "wine/exception.h"
#include "wine/rbtree.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(virtual);
WINE_DECLARE_DEBUG_CHANNEL(module);
#ifndef MAP_NORESERVE
#define MAP_NORESERVE 0
#endif
/* File view */
struct file_view
{
struct wine_rb_entry entry; /* entry in global view tree */
void *base; /* base address */
size_t size; /* size in bytes */
unsigned int protect; /* protection for all pages at allocation time and SEC_* flags */
};
/* per-page protection flags */
#define VPROT_READ 0x01
#define VPROT_WRITE 0x02
#define VPROT_EXEC 0x04
#define VPROT_WRITECOPY 0x08
#define VPROT_GUARD 0x10
#define VPROT_COMMITTED 0x20
#define VPROT_WRITEWATCH 0x40
/* per-mapping protection flags */
#define VPROT_SYSTEM 0x0200 /* system view (underlying mmap not under our control) */
/* 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 wine_rb_tree views_tree;
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__
static const UINT page_shift = 12;
static const UINT_PTR page_mask = 0xfff;
/* Note: these are Windows limits, you cannot change them. */
static void *address_space_limit = (void *)0xc0000000; /* top of the total available address space */
static void *user_space_limit = (void *)0x7fff0000; /* top of the user address space */
static void *working_set_limit = (void *)0x7fff0000; /* top of the current working set */
static void *address_space_start = (void *)0x110000; /* keep DOS area clear */
#elif defined(__x86_64__)
static const UINT page_shift = 12;
static const UINT_PTR page_mask = 0xfff;
static void *address_space_limit = (void *)0x7fffffff0000;
static void *user_space_limit = (void *)0x7fffffff0000;
static void *working_set_limit = (void *)0x7fffffff0000;
static void *address_space_start = (void *)0x10000;
#else
UINT_PTR page_size = 0;
static UINT page_shift;
static UINT_PTR page_mask;
static void *address_space_limit;
static void *user_space_limit;
static void *working_set_limit;
static void *address_space_start = (void *)0x10000;
#endif /* __i386__ */
static const BOOL is_win64 = (sizeof(void *) > sizeof(int));
#define ROUND_ADDR(addr,mask) \
((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
#define ROUND_SIZE(addr,size) \
(((SIZE_T)(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)
#ifdef _WIN64 /* on 64-bit the page protection bytes use a 2-level table */
static const size_t pages_vprot_shift = 20;
static const size_t pages_vprot_mask = (1 << 20) - 1;
static size_t pages_vprot_size;
static BYTE **pages_vprot;
#else /* on 32-bit we use a simple array with one byte per page */
static BYTE *pages_vprot;
#endif
static struct file_view *view_block_start, *view_block_end, *next_free_view;
static const size_t view_block_size = 0x100000;
static void *preload_reserve_start;
static void *preload_reserve_end;
static BOOL use_locks;
static BOOL force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
static inline int is_view_valloc( const struct file_view *view )
{
return !(view->protect & (SEC_FILE | SEC_RESERVE | SEC_COMMIT));
}
/***********************************************************************
* get_page_vprot
*
* Return the page protection byte.
*/
static BYTE get_page_vprot( const void *addr )
{
size_t idx = (size_t)addr >> page_shift;
#ifdef _WIN64
if ((idx >> pages_vprot_shift) >= pages_vprot_size) return 0;
if (!pages_vprot[idx >> pages_vprot_shift]) return 0;
return pages_vprot[idx >> pages_vprot_shift][idx & pages_vprot_mask];
#else
return pages_vprot[idx];
#endif
}
/***********************************************************************
* set_page_vprot
*
* Set a range of page protection bytes.
*/
static void set_page_vprot( const void *addr, size_t size, BYTE vprot )
{
size_t idx = (size_t)addr >> page_shift;
size_t end = ((size_t)addr + size + page_mask) >> page_shift;
#ifdef _WIN64
while (idx >> pages_vprot_shift != end >> pages_vprot_shift)
{
size_t dir_size = pages_vprot_mask + 1 - (idx & pages_vprot_mask);
memset( pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask), vprot, dir_size );
idx += dir_size;
}
memset( pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask), vprot, end - idx );
#else
memset( pages_vprot + idx, vprot, end - idx );
#endif
}
/***********************************************************************
* set_page_vprot_bits
*
* Set or clear bits in a range of page protection bytes.
*/
static void set_page_vprot_bits( const void *addr, size_t size, BYTE set, BYTE clear )
{
size_t idx = (size_t)addr >> page_shift;
size_t end = ((size_t)addr + size + page_mask) >> page_shift;
#ifdef _WIN64
for ( ; idx < end; idx++)
{
BYTE *ptr = pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask);
*ptr = (*ptr & ~clear) | set;
}
#else
for ( ; idx < end; idx++) pages_vprot[idx] = (pages_vprot[idx] & ~clear) | set;
#endif
}
/***********************************************************************
* alloc_pages_vprot
*
* Allocate the page protection bytes for a given range.
*/
static BOOL alloc_pages_vprot( const void *addr, size_t size )
{
#ifdef _WIN64
size_t idx = (size_t)addr >> page_shift;
size_t end = ((size_t)addr + size + page_mask) >> page_shift;
size_t i;
void *ptr;
assert( end <= pages_vprot_size << pages_vprot_shift );
for (i = idx >> pages_vprot_shift; i < (end + pages_vprot_mask) >> pages_vprot_shift; i++)
{
if (pages_vprot[i]) continue;
if ((ptr = wine_anon_mmap( NULL, pages_vprot_mask + 1, PROT_READ | PROT_WRITE, 0 )) == (void *)-1)
return FALSE;
pages_vprot[i] = ptr;
}
#endif
return TRUE;
}
/***********************************************************************
* compare_view
*
* View comparison function used for the rb tree.
*/
static int compare_view( const void *addr, const struct wine_rb_entry *entry )
{
struct file_view *view = WINE_RB_ENTRY_VALUE( entry, struct file_view, entry );
if (addr < view->base) return -1;
if (addr > view->base) return 1;
return 0;
}
/***********************************************************************
* 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' : ((prot & VPROT_WRITEWATCH) ? 'H' : '-');
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 | PROT_READ;
if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE | PROT_READ;
if (vprot & VPROT_EXEC) prot |= PROT_EXEC | PROT_READ;
if (vprot & VPROT_WRITEWATCH) prot &= ~PROT_WRITE;
}
if (!prot) prot = PROT_NONE;
return prot;
}
/***********************************************************************
* VIRTUAL_DumpView
*/
static void VIRTUAL_DumpView( struct file_view *view )
{
UINT i, count;
char *addr = view->base;
BYTE prot = get_page_vprot( addr );
TRACE( "View: %p - %p", addr, addr + view->size - 1 );
if (view->protect & VPROT_SYSTEM)
TRACE( " (builtin image)\n" );
else if (view->protect & SEC_IMAGE)
TRACE( " (image)\n" );
else if (view->protect & SEC_FILE)
TRACE( " (file)\n" );
else if (view->protect & (SEC_RESERVE | SEC_COMMIT))
TRACE( " (anonymous)\n" );
else
TRACE( " (valloc)\n");
for (count = i = 1; i < view->size >> page_shift; i++, count++)
{
BYTE next = get_page_vprot( addr + (count << page_shift) );
if (next == prot) continue;
TRACE( " %p - %p %s\n",
addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
addr += (count << page_shift);
prot = next;
count = 0;
}
if (count)
TRACE( " %p - %p %s\n",
addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
}
/***********************************************************************
* VIRTUAL_Dump
*/
#ifdef 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 );
WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct 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, size_t size )
{
struct wine_rb_entry *ptr = views_tree.root;
if ((const char *)addr + size < (const char *)addr) return NULL; /* overflow */
while (ptr)
{
struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
if (view->base > addr) ptr = ptr->left;
else if ((const char *)view->base + view->size <= (const char *)addr) ptr = ptr->right;
else if ((const char *)view->base + view->size < (const char *)addr + size) break; /* size too large */
else 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;
if (zero_bits > 21) return 0;
return (1 << zero_bits) - 1;
}
/***********************************************************************
* is_write_watch_range
*/
static inline BOOL is_write_watch_range( const void *addr, size_t size )
{
struct file_view *view = VIRTUAL_FindView( addr, size );
return view && (view->protect & VPROT_WRITEWATCH);
}
/***********************************************************************
* 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 wine_rb_entry *ptr = views_tree.root;
while (ptr)
{
struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
if ((const char *)view->base >= (const char *)addr + size) ptr = ptr->left;
else if ((const char *)view->base + view->size <= (const char *)addr) ptr = ptr->right;
else 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 wine_rb_entry *first = NULL, *ptr = views_tree.root;
void *start;
/* find the first (resp. last) view inside the range */
while (ptr)
{
struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
if ((char *)view->base + view->size >= (char *)end)
{
end = min( end, view->base );
ptr = ptr->left;
}
else if (view->base <= base)
{
base = max( (char *)base, (char *)view->base + view->size );
ptr = ptr->right;
}
else
{
first = ptr;
ptr = top_down ? ptr->right : ptr->left;
}
}
if (top_down)
{
start = ROUND_ADDR( (char *)end - size, mask );
if (start >= end || start < base) return NULL;
while (first)
{
struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
if ((char *)view->base + view->size <= (char *)start) break;
start = ROUND_ADDR( (char *)view->base - size, mask );
/* stop if remaining space is not large enough */
if (!start || start >= end || start < base) return NULL;
first = wine_rb_prev( first );
}
}
else
{
start = ROUND_ADDR( (char *)base + mask, mask );
if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
while (first)
{
struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
if ((char *)view->base >= (char *)start + size) break;
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;
first = wine_rb_next( first );
}
}
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 );
}
/***********************************************************************
* 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 file_view *view;
TRACE( "removing %p-%p\n", addr, (char *)addr + size );
wine_mmap_remove_reserved_area( addr, size, 0 );
/* unmap areas not covered by an existing view */
WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct file_view, entry )
{
if ((char *)view->base >= (char *)addr + size) break;
if ((char *)view->base + view->size <= (char *)addr) continue;
if (view->base > addr) munmap( addr, (char *)view->base - (char *)addr );
if ((char *)view->base + view->size > (char *)addr + size) return;
size = (char *)addr + size - ((char *)view->base + view->size);
addr = (char *)view->base + view->size;
}
munmap( addr, size );
}
struct area_boundary
{
void *base;
size_t size;
void *boundary;
};
/***********************************************************************
* get_area_boundary_callback
*
* Get lowest boundary address between reserved area and non-reserved area
* in the specified region. If no boundaries are found, result is NULL.
* The csVirtual section must be held by caller.
*/
static int get_area_boundary_callback( void *start, size_t size, void *arg )
{
struct area_boundary *area = arg;
void *end = (char *)start + size;
area->boundary = NULL;
if (area->base >= end) return 0;
if ((char *)start >= (char *)area->base + area->size) return 1;
if (area->base >= start)
{
if ((char *)area->base + area->size > (char *)end)
{
area->boundary = end;
return 1;
}
return 0;
}
area->boundary = start;
return 1;
}
/***********************************************************************
* is_beyond_limit
*
* Check if an address range goes beyond a given limit.
*/
static inline BOOL is_beyond_limit( const void *addr, size_t size, const void *limit )
{
return (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 )
{
switch (wine_mmap_is_in_reserved_area( addr, size ))
{
case -1: /* partially in a reserved area */
{
struct area_boundary area;
size_t lower_size;
area.base = addr;
area.size = size;
wine_mmap_enum_reserved_areas( get_area_boundary_callback, &area, 0 );
assert( area.boundary );
lower_size = (char *)area.boundary - (char *)addr;
unmap_area( addr, lower_size );
unmap_area( area.boundary, size - lower_size );
break;
}
case 1: /* in a reserved area */
wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
break;
default:
case 0: /* not in a reserved area */
if (is_beyond_limit( addr, size, user_space_limit ))
add_reserved_area( addr, size );
else
munmap( addr, size );
break;
}
}
/***********************************************************************
* alloc_view
*
* Allocate a new view. The csVirtual section must be held by caller.
*/
static struct file_view *alloc_view(void)
{
if (next_free_view)
{
struct file_view *ret = next_free_view;
next_free_view = *(struct file_view **)ret;
return ret;
}
if (view_block_start == view_block_end)
{
void *ptr = wine_anon_mmap( NULL, view_block_size, PROT_READ | PROT_WRITE, 0 );
if (ptr == (void *)-1) return NULL;
view_block_start = ptr;
view_block_end = view_block_start + view_block_size / sizeof(*view_block_start);
}
return view_block_start++;
}
/***********************************************************************
* 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->protect & VPROT_SYSTEM)) unmap_area( view->base, view->size );
set_page_vprot( view->base, view->size, 0 );
wine_rb_remove( &views_tree, &view->entry );
*(struct file_view **)view = next_free_view;
next_free_view = 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, unsigned int vprot )
{
struct file_view *view;
int unix_prot = VIRTUAL_GetUnixProt( vprot );
assert( !((UINT_PTR)base & page_mask) );
assert( !(size & page_mask) );
/* 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. */
while ((view = find_view_range( base, size )))
{
TRACE( "overlapping view %p-%p for %p-%p\n",
view->base, (char *)view->base + view->size, base, (char *)base + size );
assert( view->protect & VPROT_SYSTEM );
delete_view( view );
}
if (!alloc_pages_vprot( base, size )) return STATUS_NO_MEMORY;
/* Create the view structure */
if (!(view = alloc_view()))
{
FIXME( "out of memory for %p-%p\n", base, (char *)base + size );
return STATUS_NO_MEMORY;
}
view->base = base;
view->size = size;
view->protect = vprot;
set_page_vprot( base, size, vprot );
wine_rb_put( &views_tree, view->base, &view->entry );
*view_ret = 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, unsigned int map_prot )
{
DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
if (map_prot & SEC_NOCACHE) ret |= PAGE_NOCACHE;
return ret;
}
/***********************************************************************
* get_vprot_flags
*
* Build page protections from Win32 flags.
*
* PARAMS
* protect [I] Win32 protection flags
*
* RETURNS
* Value of page protection flags
*/
static NTSTATUS get_vprot_flags( DWORD protect, unsigned int *vprot, BOOL image )
{
switch(protect & 0xff)
{
case PAGE_READONLY:
*vprot = VPROT_READ;
break;
case PAGE_READWRITE:
if (image)
*vprot = VPROT_READ | VPROT_WRITECOPY;
else
*vprot = VPROT_READ | VPROT_WRITE;
break;
case PAGE_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:
if (image)
*vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
else
*vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
break;
case PAGE_EXECUTE_WRITECOPY:
*vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
break;
case PAGE_NOACCESS:
*vprot = 0;
break;
default:
return STATUS_INVALID_PAGE_PROTECTION;
}
if (protect & PAGE_GUARD) *vprot |= VPROT_GUARD;
return STATUS_SUCCESS;
}
/***********************************************************************
* mprotect_exec
*
* Wrapper for mprotect, adds PROT_EXEC if forced by force_exec_prot
*/
static inline int mprotect_exec( void *base, size_t size, int unix_prot )
{
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 )) return 0;
/* exec + write may legitimately fail, in that case fall back to write only */
if (!(unix_prot & PROT_WRITE)) return -1;
}
return mprotect( base, size, unix_prot );
}
/***********************************************************************
* mprotect_range
*
* Call mprotect on a page range, applying the protections from the per-page byte.
*/
static void mprotect_range( void *base, size_t size, BYTE set, BYTE clear )
{
size_t i, count;
char *addr = ROUND_ADDR( base, page_mask );
int prot, next;
size = ROUND_SIZE( base, size );
prot = VIRTUAL_GetUnixProt( (get_page_vprot( addr ) & ~clear ) | set );
for (count = i = 1; i < size >> page_shift; i++, count++)
{
next = VIRTUAL_GetUnixProt( (get_page_vprot( addr + (count << page_shift) ) & ~clear) | set );
if (next == prot) continue;
mprotect_exec( addr, count << page_shift, prot );
addr += count << page_shift;
prot = next;
count = 0;
}
if (count) mprotect_exec( addr, count << page_shift, prot );
}
/***********************************************************************
* VIRTUAL_SetProt
*
* Change the protection of a range of pages.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
static BOOL VIRTUAL_SetProt( struct 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);
if (view->protect & VPROT_WRITEWATCH)
{
/* each page may need different protections depending on write watch flag */
set_page_vprot_bits( base, size, vprot & ~VPROT_WRITEWATCH, ~vprot & ~VPROT_WRITEWATCH );
mprotect_range( base, size, 0, 0 );
return TRUE;
}
/* if setting stack guard pages, store the permissions first, as the guard may be
* triggered at any point after mprotect and change the permissions again */
if ((vprot & VPROT_GUARD) &&
(base >= NtCurrentTeb()->DeallocationStack) &&
(base < NtCurrentTeb()->Tib.StackBase))
{
set_page_vprot( base, size, vprot );
mprotect( base, size, unix_prot );
return TRUE;
}
if (mprotect_exec( base, size, unix_prot )) /* FIXME: last error */
return FALSE;
set_page_vprot( base, size, vprot );
return TRUE;
}
/***********************************************************************
* set_protection
*
* Set page protections on a range of pages
*/
static NTSTATUS set_protection( struct file_view *view, void *base, SIZE_T size, ULONG protect )
{
unsigned int vprot;
NTSTATUS status;
if ((status = get_vprot_flags( protect, &vprot, view->protect & SEC_IMAGE ))) return status;
if (is_view_valloc( view ))
{
if (vprot & VPROT_WRITECOPY) return STATUS_INVALID_PAGE_PROTECTION;
}
else
{
BYTE access = vprot & (VPROT_READ | VPROT_WRITE | VPROT_EXEC);
if ((view->protect & access) != access) return STATUS_INVALID_PAGE_PROTECTION;
}
if (!VIRTUAL_SetProt( view, base, size, vprot | VPROT_COMMITTED )) return STATUS_ACCESS_DENIED;
return STATUS_SUCCESS;
}
/***********************************************************************
* update_write_watches
*/
static void update_write_watches( void *base, size_t size, size_t accessed_size )
{
TRACE( "updating watch %p-%p-%p\n", base, (char *)base + accessed_size, (char *)base + size );
/* clear write watch flag on accessed pages */
set_page_vprot_bits( base, accessed_size, 0, VPROT_WRITEWATCH );
/* restore page protections on the entire range */
mprotect_range( base, size, 0, 0 );
}
/***********************************************************************
* reset_write_watches
*
* Reset write watches in a memory range.
*/
static void reset_write_watches( void *base, SIZE_T size )
{
set_page_vprot_bits( base, size, VPROT_WRITEWATCH, 0 );
mprotect_range( base, size, 0, 0 );
}
/***********************************************************************
* 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 *limit;
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 )
{
struct alloc_area *alloc = arg;
void *end = (char *)start + size;
if (start < address_space_start) start = address_space_start;
if (is_beyond_limit( start, size, alloc->limit )) end = alloc->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_fixed_area
*
* mmap the fixed memory area.
* The csVirtual section must be held by caller.
*/
static NTSTATUS map_fixed_area( void *base, size_t size, unsigned int vprot )
{
void *ptr;
switch (wine_mmap_is_in_reserved_area( base, size ))
{
case -1: /* partially in a reserved area */
{
NTSTATUS status;
struct area_boundary area;
size_t lower_size;
area.base = base;
area.size = size;
wine_mmap_enum_reserved_areas( get_area_boundary_callback, &area, 0 );
assert( area.boundary );
lower_size = (char *)area.boundary - (char *)base;
status = map_fixed_area( base, lower_size, vprot );
if (status == STATUS_SUCCESS)
{
status = map_fixed_area( area.boundary, size - lower_size, vprot);
if (status != STATUS_SUCCESS) unmap_area( base, lower_size );
}
return status;
}
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;
}
if (is_beyond_limit( ptr, size, working_set_limit )) working_set_limit = address_space_limit;
return STATUS_SUCCESS;
}
/***********************************************************************
* 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, unsigned int vprot )
{
void *ptr;
NTSTATUS status;
if (base)
{
if (is_beyond_limit( base, size, address_space_limit ))
return STATUS_WORKING_SET_LIMIT_RANGE;
status = map_fixed_area( base, size, vprot );
if (status != STATUS_SUCCESS) return status;
ptr = base;
}
else
{
size_t view_size = size + mask + 1;
struct alloc_area alloc;
alloc.size = size;
alloc.mask = mask;
alloc.top_down = top_down;
alloc.limit = user_space_limit;
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;
}
/***********************************************************************
* 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, unsigned int vprot, BOOL removable )
{
void *ptr;
int prot = VIRTUAL_GetUnixProt( vprot | VPROT_COMMITTED /* make sure it is accessible */ );
unsigned int flags = MAP_FIXED | ((vprot & VPROT_WRITECOPY) ? MAP_PRIVATE : MAP_SHARED);
assert( start < view->size );
assert( start + size <= view->size );
if (force_exec_prot && (vprot & VPROT_READ))
{
TRACE( "forcing exec permission on mapping %p-%p\n",
(char *)view->base + start, (char *)view->base + start + size - 1 );
prot |= PROT_EXEC;
}
/* only try mmap if media is not removable (or if we require write access) */
if (!removable || (flags & MAP_SHARED))
{
if (mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
goto done;
switch (errno)
{
case EINVAL: /* file offset is not page-aligned, fall back to read() */
if (flags & MAP_SHARED) return STATUS_INVALID_PARAMETER;
break;
case ENOEXEC:
case ENODEV: /* filesystem doesn't support mmap(), fall back to read() */
if (vprot & VPROT_WRITE)
{
ERR( "shared writable mmap not supported, broken filesystem?\n" );
return STATUS_NOT_SUPPORTED;
}
break;
case EACCES:
case EPERM: /* noexec filesystem, fall back to read() */
if (flags & MAP_SHARED)
{
if (prot & PROT_EXEC) ERR( "failed to set PROT_EXEC on file map, noexec filesystem?\n" );
return STATUS_ACCESS_DENIED;
}
if (prot & PROT_EXEC) WARN( "failed to set PROT_EXEC on file map, noexec filesystem?\n" );
break;
default:
return FILE_GetNtStatus();
}
}
/* 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:
set_page_vprot( (char *)view->base + start, size, vprot );
return STATUS_SUCCESS;
}
/***********************************************************************
* get_committed_size
*
* Get the size of the committed range starting at base.
* Also return the protections for the first page.
*/
static SIZE_T get_committed_size( struct file_view *view, void *base, BYTE *vprot )
{
SIZE_T i, start;
start = ((char *)base - (char *)view->base) >> page_shift;
*vprot = get_page_vprot( base );
if (view->protect & SEC_RESERVE)
{
SIZE_T ret = 0;
SERVER_START_REQ( get_mapping_committed_range )
{
req->base = wine_server_client_ptr( view->base );
req->offset = start << page_shift;
if (!wine_server_call( req ))
{
ret = reply->size;
if (reply->committed)
{
*vprot |= VPROT_COMMITTED;
set_page_vprot_bits( base, ret, VPROT_COMMITTED, 0 );
}
}
}
SERVER_END_REQ;
return ret;
}
for (i = start + 1; i < view->size >> page_shift; i++)
if ((*vprot ^ get_page_vprot( (char *)view->base + (i << page_shift) )) & VPROT_COMMITTED) break;
return (i - start) << page_shift;
}
/***********************************************************************
* 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)
{
set_page_vprot_bits( (char *)view->base + start, size, 0, VPROT_COMMITTED );
return STATUS_SUCCESS;
}
return FILE_GetNtStatus();
}
/***********************************************************************
* allocate_dos_memory
*
* Allocate the DOS memory range.
*/
static NTSTATUS allocate_dos_memory( struct file_view **view, unsigned int vprot )
{
size_t size;
void *addr = NULL;
void * const low_64k = (void *)0x10000;
const size_t dosmem_size = 0x110000;
int unix_prot = VIRTUAL_GetUnixProt( vprot );
/* check for existing view */
if (find_view_range( 0, dosmem_size )) return STATUS_CONFLICTING_ADDRESSES;
/* check without the first 64K */
if (wine_mmap_is_in_reserved_area( low_64k, dosmem_size - 0x10000 ) != 1)
{
addr = wine_anon_mmap( low_64k, dosmem_size - 0x10000, unix_prot, 0 );
if (addr != low_64k)
{
if (addr != (void *)-1) munmap( addr, dosmem_size - 0x10000 );
return map_view( view, NULL, dosmem_size, 0xffff, 0, vprot );
}
}
/* now try to allocate the low 64K too */
if (wine_mmap_is_in_reserved_area( NULL, 0x10000 ) != 1)
{
addr = wine_anon_mmap( (void *)page_size, 0x10000 - page_size, unix_prot, 0 );
if (addr == (void *)page_size)
{
if (!wine_anon_mmap( NULL, page_size, unix_prot, MAP_FIXED ))
{
addr = NULL;
TRACE( "successfully mapped low 64K range\n" );
}
else TRACE( "failed to map page 0\n" );
}
else
{
if (addr != (void *)-1) munmap( addr, 0x10000 - page_size );
addr = low_64k;
TRACE( "failed to map low 64K range\n" );
}
}
/* now reserve the whole range */
size = (char *)dosmem_size - (char *)addr;
wine_anon_mmap( addr, size, unix_prot, MAP_FIXED );
return create_view( view, addr, size, vprot );
}
/***********************************************************************
* map_pe_header
*
* Map the header of a PE file into memory.
*/
static NTSTATUS map_pe_header( void *ptr, size_t size, int fd, BOOL *removable )
{
if (!size) return STATUS_INVALID_IMAGE_FORMAT;
if (!*removable)
{
if (mmap( ptr, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_FIXED|MAP_PRIVATE, fd, 0 ) != (void *)-1)
return STATUS_SUCCESS;
switch (errno)
{
case EPERM:
case EACCES:
WARN( "noexec file system, falling back to read\n" );
break;
case ENOEXEC:
case ENODEV:
WARN( "file system doesn't support mmap, falling back to read\n" );
break;
default:
return FILE_GetNtStatus();
}
*removable = TRUE;
}
pread( fd, ptr, size, 0 );
return STATUS_SUCCESS; /* page protections will be updated later */
}
/***********************************************************************
* map_image
*
* Map an executable (PE format) image into memory.
*/
static NTSTATUS map_image( HANDLE hmapping, ACCESS_MASK access, int fd, SIZE_T mask,
pe_image_info_t *image_info, int shared_fd, BOOL removable, PVOID *addr_ptr )
{
IMAGE_DOS_HEADER *dos;
IMAGE_NT_HEADERS *nt;
IMAGE_SECTION_HEADER sections[96];
IMAGE_SECTION_HEADER *sec;
IMAGE_DATA_DIRECTORY *imports;
NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
SIZE_T header_size, total_size = image_info->map_size;
int i;
off_t pos;
sigset_t sigset;
struct stat st;
struct file_view *view = NULL;
char *ptr, *header_end, *header_start;
char *base = wine_server_get_ptr( image_info->base );
if (total_size != image_info->map_size) /* truncated */
{
WARN( "Modules larger than 4Gb (%s) not supported\n", wine_dbgstr_longlong(image_info->map_size) );
return STATUS_INVALID_PARAMETER;
}
if ((ULONG_PTR)base != image_info->base) base = NULL;
/* zero-map the whole range */
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (base >= (char *)address_space_start) /* make sure the DOS area remains free */
status = map_view( &view, base, total_size, mask, FALSE, SEC_IMAGE | SEC_FILE |
VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY );
if (status != STATUS_SUCCESS)
status = map_view( &view, NULL, total_size, mask, FALSE, SEC_IMAGE | SEC_FILE |
VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY );
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;
}
header_size = min( image_info->header_size, st.st_size );
if ((status = map_pe_header( view->base, header_size, fd, &removable )) != STATUS_SUCCESS) goto error;
status = STATUS_INVALID_IMAGE_FORMAT; /* generic 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;
header_start = (char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader;
if (nt->FileHeader.NumberOfSections > ARRAY_SIZE( sections )) goto error;
if (header_start + sizeof(*sections) * nt->FileHeader.NumberOfSections > header_end) goto error;
/* Some applications (e.g. the Steam version of Borderlands) map over the top of the section headers,
* copying the headers into local memory is necessary to properly load such applications. */
memcpy(sections, header_start, sizeof(*sections) * nt->FileHeader.NumberOfSections);
sec = sections;
imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
if (!imports->Size || !imports->VirtualAddress) imports = NULL;
/* check for non page-aligned binary */
if (image_info->image_flags & IMAGE_FLAGS_ImageMappedFlat)
{
/* 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 | VPROT_WRITECOPY,
removable ) != 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 );
/* no relocations are performed on non page-aligned binaries */
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,
removable ) != 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 );
}
}
/* set the image protections */
VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
sec = sections;
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_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;
if (!VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot ) && (vprot & VPROT_EXEC))
ERR( "failed to set %08x protection on section %.8s, noexec filesystem?\n",
sec->Characteristics, sec->Name );
}
done:
SERVER_START_REQ( map_view )
{
req->mapping = wine_server_obj_handle( hmapping );
req->access = access;
req->base = wine_server_client_ptr( view->base );
req->size = view->size;
req->start = 0;
status = wine_server_call( req );
}
SERVER_END_REQ;
if (status) goto error;
VIRTUAL_DEBUG_DUMP_VIEW( view );
server_leave_uninterrupted_section( &csVirtual, &sigset );
*addr_ptr = ptr;
#ifdef VALGRIND_LOAD_PDB_DEBUGINFO
VALGRIND_LOAD_PDB_DEBUGINFO(fd, ptr, total_size, ptr - base);
#endif
if (ptr != base) return STATUS_IMAGE_NOT_AT_BASE;
return STATUS_SUCCESS;
error:
if (view) delete_view( view );
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* virtual_map_section
*
* Map a file section into memory.
*/
NTSTATUS virtual_map_section( HANDLE handle, PVOID *addr_ptr, ULONG zero_bits, SIZE_T commit_size,
const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr, ULONG protect,
pe_image_info_t *image_info )
{
NTSTATUS res;
mem_size_t full_size;
ACCESS_MASK access;
SIZE_T size, mask = get_mask( zero_bits );
int unix_handle = -1, needs_close;
unsigned int vprot, sec_flags;
struct file_view *view;
HANDLE shared_file;
LARGE_INTEGER offset;
sigset_t sigset;
offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
switch(protect)
{
case PAGE_NOACCESS:
case PAGE_READONLY:
case PAGE_WRITECOPY:
access = SECTION_MAP_READ;
break;
case PAGE_READWRITE:
access = SECTION_MAP_WRITE;
break;
case PAGE_EXECUTE:
case PAGE_EXECUTE_READ:
case PAGE_EXECUTE_WRITECOPY:
access = SECTION_MAP_READ | SECTION_MAP_EXECUTE;
break;
case PAGE_EXECUTE_READWRITE:
access = SECTION_MAP_WRITE | SECTION_MAP_EXECUTE;
break;
default:
return STATUS_INVALID_PAGE_PROTECTION;
}
SERVER_START_REQ( get_mapping_info )
{
req->handle = wine_server_obj_handle( handle );
req->access = access;
wine_server_set_reply( req, image_info, sizeof(*image_info) );
res = wine_server_call( req );
sec_flags = reply->flags;
full_size = reply->size;
shared_file = wine_server_ptr_handle( reply->shared_file );
}
SERVER_END_REQ;
if (res) return res;
if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
if (sec_flags & SEC_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, access, unix_handle, mask, image_info,
shared_fd, needs_close, addr_ptr );
if (shared_needs_close) close( shared_fd );
close_handle( shared_file );
}
else
{
res = map_image( handle, access, unix_handle, mask, image_info, -1, needs_close, addr_ptr );
}
if (needs_close) close( unix_handle );
if (res >= 0) *size_ptr = image_info->map_size;
return res;
}
res = STATUS_INVALID_PARAMETER;
if (offset.QuadPart >= full_size) goto done;
if (*size_ptr)
{
size = *size_ptr;
if (size > full_size - offset.QuadPart)
{
res = STATUS_INVALID_VIEW_SIZE;
goto done;
}
}
else
{
size = full_size - offset.QuadPart;
if (size != full_size - offset.QuadPart) /* truncated */
{
WARN( "Files larger than 4Gb (%s) not supported on this platform\n",
wine_dbgstr_longlong(full_size) );
goto done;
}
}
if (!(size = ROUND_SIZE( 0, size ))) goto done; /* wrap-around */
/* Reserve a properly aligned area */
server_enter_uninterrupted_section( &csVirtual, &sigset );
get_vprot_flags( protect, &vprot, sec_flags & SEC_IMAGE );
vprot |= sec_flags;
if (!(sec_flags & SEC_RESERVE)) vprot |= VPROT_COMMITTED;
res = map_view( &view, *addr_ptr, size, mask, FALSE, vprot );
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, vprot, needs_close );
if (res == STATUS_SUCCESS)
{
SERVER_START_REQ( map_view )
{
req->mapping = wine_server_obj_handle( handle );
req->access = access;
req->base = wine_server_client_ptr( view->base );
req->size = size;
req->start = offset.QuadPart;
res = wine_server_call( req );
}
SERVER_END_REQ;
}
if (res == STATUS_SUCCESS)
{
*addr_ptr = view->base;
*size_ptr = size;
VIRTUAL_DEBUG_DUMP_VIEW( view );
}
else
{
ERR( "mapping %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 (needs_close) close( unix_handle );
return res;
}
struct alloc_virtual_heap
{
void *base;
size_t size;
};
/* callback for wine_mmap_enum_reserved_areas to allocate space for the virtual heap */
static int alloc_virtual_heap( void *base, size_t size, void *arg )
{
struct alloc_virtual_heap *alloc = arg;
if (is_beyond_limit( base, size, address_space_limit )) address_space_limit = (char *)base + size;
if (size < alloc->size) return 0;
if (is_win64 && base < (void *)0x80000000) return 0;
alloc->base = wine_anon_mmap( (char *)base + size - alloc->size, alloc->size,
PROT_READ|PROT_WRITE, MAP_FIXED );
return (alloc->base != (void *)-1);
}
/***********************************************************************
* virtual_init
*/
void virtual_init(void)
{
const char *preload;
struct alloc_virtual_heap alloc_views;
size_t size;
#if !defined(__i386__) && !defined(__x86_64__)
page_size = sysconf( _SC_PAGESIZE );
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++;
#ifdef _WIN64
address_space_limit = (void *)(((1UL << 47) - 1) & ~page_mask);
#else
address_space_limit = (void *)~page_mask;
#endif
user_space_limit = working_set_limit = address_space_limit;
#endif
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;
/* some apps start inside the DOS area */
if (preload_reserve_start)
address_space_start = min( address_space_start, preload_reserve_start );
}
}
/* try to find space in a reserved area for the views and pages protection table */
#ifdef _WIN64
pages_vprot_size = ((size_t)address_space_limit >> page_shift >> pages_vprot_shift) + 1;
alloc_views.size = view_block_size + pages_vprot_size * sizeof(*pages_vprot);
#else
alloc_views.size = view_block_size + (1U << (32 - page_shift));
#endif
if (wine_mmap_enum_reserved_areas( alloc_virtual_heap, &alloc_views, 1 ))
wine_mmap_remove_reserved_area( alloc_views.base, alloc_views.size, 0 );
else
alloc_views.base = wine_anon_mmap( NULL, alloc_views.size, PROT_READ | PROT_WRITE, 0 );
assert( alloc_views.base != (void *)-1 );
view_block_start = alloc_views.base;
view_block_end = view_block_start + view_block_size / sizeof(*view_block_start);
pages_vprot = (void *)((char *)alloc_views.base + view_block_size);
wine_rb_init( &views_tree, compare_view );
/* make the DOS area accessible (except the low 64K) to hide bugs in broken apps like Excel 2003 */
size = (char *)address_space_start - (char *)0x10000;
if (size && wine_mmap_is_in_reserved_area( (void*)0x10000, size ) == 1)
wine_anon_mmap( (void *)0x10000, size, PROT_READ | PROT_WRITE, MAP_FIXED );
}
/***********************************************************************
* virtual_init_threading
*/
void virtual_init_threading(void)
{
use_locks = TRUE;
}
/***********************************************************************
* virtual_get_system_info
*/
void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
{
#ifdef HAVE_SYSINFO
struct sysinfo sinfo;
#endif
info->unknown = 0;
info->KeMaximumIncrement = 0; /* FIXME */
info->PageSize = page_size;
info->MmLowestPhysicalPage = 1;
info->MmHighestPhysicalPage = 0x7fffffff / page_size;
#ifdef HAVE_SYSINFO
if (!sysinfo(&sinfo))
{
ULONG64 total = (ULONG64)sinfo.totalram * sinfo.mem_unit;
info->MmHighestPhysicalPage = max(1, total / page_size);
}
#endif
info->MmNumberOfPhysicalPages = info->MmHighestPhysicalPage - info->MmLowestPhysicalPage;
info->AllocationGranularity = get_mask(0) + 1;
info->LowestUserAddress = (void *)0x10000;
info->HighestUserAddress = (char *)user_space_limit - 1;
info->ActiveProcessorsAffinityMask = get_system_affinity_mask();
info->NumberOfProcessors = NtCurrentTeb()->Peb->NumberOfProcessors;
}
/***********************************************************************
* virtual_create_builtin_view
*/
NTSTATUS virtual_create_builtin_view( void *module )
{
NTSTATUS status;
sigset_t sigset;
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( module );
SIZE_T size = nt->OptionalHeader.SizeOfImage;
IMAGE_SECTION_HEADER *sec;
struct file_view *view;
void *base;
int i;
size = ROUND_SIZE( module, size );
base = ROUND_ADDR( module, page_mask );
server_enter_uninterrupted_section( &csVirtual, &sigset );
status = create_view( &view, base, size, SEC_IMAGE | SEC_FILE | VPROT_SYSTEM |
VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
if (!status)
{
TRACE( "created %p-%p\n", base, (char *)base + size );
/* The PE header is always read-only, no write, no execute. */
set_page_vprot( base, page_size, VPROT_COMMITTED | VPROT_READ );
sec = (IMAGE_SECTION_HEADER *)((char *)&nt->OptionalHeader + nt->FileHeader.SizeOfOptionalHeader);
for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
{
BYTE flags = VPROT_COMMITTED;
if (sec[i].Characteristics & IMAGE_SCN_MEM_EXECUTE) flags |= VPROT_EXEC;
if (sec[i].Characteristics & IMAGE_SCN_MEM_READ) flags |= VPROT_READ;
if (sec[i].Characteristics & IMAGE_SCN_MEM_WRITE) flags |= VPROT_WRITE;
set_page_vprot( (char *)base + sec[i].VirtualAddress, sec[i].Misc.VirtualSize, flags );
}
VIRTUAL_DEBUG_DUMP_VIEW( view );
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* virtual_alloc_thread_stack
*/
NTSTATUS virtual_alloc_thread_stack( TEB *teb, SIZE_T reserve_size, SIZE_T commit_size, SIZE_T *pthread_size )
{
struct file_view *view;
NTSTATUS status;
sigset_t sigset;
SIZE_T size, extra_size = 0;
if (!reserve_size || !commit_size)
{
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
if (!reserve_size) reserve_size = nt->OptionalHeader.SizeOfStackReserve;
if (!commit_size) commit_size = nt->OptionalHeader.SizeOfStackCommit;
}
size = max( reserve_size, commit_size );
if (size < 1024 * 1024) size = 1024 * 1024; /* Xlib needs a large stack */
size = (size + 0xffff) & ~0xffff; /* round to 64K boundary */
if (pthread_size) *pthread_size = extra_size = max( page_size, ROUND_SIZE( 0, *pthread_size ));
server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((status = map_view( &view, NULL, size + extra_size, 0xffff, 0,
VPROT_READ | VPROT_WRITE | VPROT_COMMITTED )) != STATUS_SUCCESS)
goto done;
#ifdef VALGRIND_STACK_REGISTER
VALGRIND_STACK_REGISTER( view->base, (char *)view->base + view->size );
#endif
/* setup no access guard page */
set_page_vprot( view->base, page_size, VPROT_COMMITTED );
set_page_vprot( (char *)view->base + page_size, page_size,
VPROT_READ | VPROT_WRITE | VPROT_COMMITTED | VPROT_GUARD );
mprotect_range( view->base, 2 * page_size, 0, 0 );
VIRTUAL_DEBUG_DUMP_VIEW( view );
if (extra_size)
{
struct file_view *extra_view;
/* shrink the first view and create a second one for the extra size */
/* this allows the app to free the stack without freeing the thread start portion */
view->size -= extra_size;
status = create_view( &extra_view, (char *)view->base + view->size, extra_size,
VPROT_READ | VPROT_WRITE | VPROT_COMMITTED );
if (status != STATUS_SUCCESS)
{
unmap_area( (char *)view->base + view->size, extra_size );
delete_view( view );
goto done;
}
}
/* note: limit is lower than base since the stack grows down */
teb->DeallocationStack = view->base;
teb->Tib.StackBase = (char *)view->base + view->size;
teb->Tib.StackLimit = (char *)view->base + 2 * page_size;
done:
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* virtual_clear_thread_stack
*
* Clear the stack contents before calling the main entry point, some broken apps need that.
*/
void virtual_clear_thread_stack( void *stack_end )
{
void *stack = NtCurrentTeb()->Tib.StackLimit;
size_t size = (char *)stack_end - (char *)stack;
wine_anon_mmap( stack, size, PROT_READ | PROT_WRITE, MAP_FIXED );
if (force_exec_prot) mprotect( stack, size, PROT_READ | PROT_WRITE | PROT_EXEC );
}
/***********************************************************************
* virtual_handle_fault
*/
NTSTATUS virtual_handle_fault( LPCVOID addr, DWORD err, BOOL on_signal_stack )
{
NTSTATUS ret = STATUS_ACCESS_VIOLATION;
void *page = ROUND_ADDR( addr, page_mask );
sigset_t sigset;
BYTE vprot;
server_enter_uninterrupted_section( &csVirtual, &sigset );
vprot = get_page_vprot( page );
if (!on_signal_stack && (vprot & VPROT_GUARD))
{
set_page_vprot_bits( page, page_size, 0, VPROT_GUARD );
mprotect_range( page, page_size, 0, 0 );
ret = STATUS_GUARD_PAGE_VIOLATION;
}
else if (err & EXCEPTION_WRITE_FAULT)
{
if (vprot & VPROT_WRITEWATCH)
{
set_page_vprot_bits( page, page_size, 0, VPROT_WRITEWATCH );
mprotect_range( page, page_size, 0, 0 );
}
/* ignore fault if page is writable now */
if (VIRTUAL_GetUnixProt( get_page_vprot( page )) & PROT_WRITE)
{
if ((vprot & VPROT_WRITEWATCH) || is_write_watch_range( page, page_size ))
ret = STATUS_SUCCESS;
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return ret;
}
/***********************************************************************
* check_write_access
*
* Check if the memory range is writable, temporarily disabling write watches if necessary.
*/
static NTSTATUS check_write_access( void *base, size_t size, BOOL *has_write_watch )
{
size_t i;
char *addr = ROUND_ADDR( base, page_mask );
size = ROUND_SIZE( base, size );
for (i = 0; i < size; i += page_size)
{
BYTE vprot = get_page_vprot( addr + i );
if (vprot & VPROT_WRITEWATCH) *has_write_watch = TRUE;
if (!(VIRTUAL_GetUnixProt( vprot & ~VPROT_WRITEWATCH ) & PROT_WRITE))
return STATUS_INVALID_USER_BUFFER;
}
if (*has_write_watch)
mprotect_range( addr, size, 0, VPROT_WRITEWATCH ); /* temporarily enable write access */
return STATUS_SUCCESS;
}
/***********************************************************************
* virtual_locked_server_call
*/
unsigned int virtual_locked_server_call( void *req_ptr )
{
struct __server_request_info * const req = req_ptr;
sigset_t sigset;
void *addr = req->reply_data;
data_size_t size = req->u.req.request_header.reply_size;
BOOL has_write_watch = FALSE;
unsigned int ret = STATUS_ACCESS_VIOLATION;
if (!size) return wine_server_call( req_ptr );
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!(ret = check_write_access( addr, size, &has_write_watch )))
{
ret = server_call_unlocked( req );
if (has_write_watch) update_write_watches( addr, size, wine_server_reply_size( req ));
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return ret;
}
/***********************************************************************
* virtual_locked_read
*/
ssize_t virtual_locked_read( int fd, void *addr, size_t size )
{
sigset_t sigset;
BOOL has_write_watch = FALSE;
int err = EFAULT;
ssize_t ret = read( fd, addr, size );
if (ret != -1 || errno != EFAULT) return ret;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!check_write_access( addr, size, &has_write_watch ))
{
ret = read( fd, addr, size );
err = errno;
if (has_write_watch) update_write_watches( addr, size, max( 0, ret ));
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
errno = err;
return ret;
}
/***********************************************************************
* virtual_locked_pread
*/
ssize_t virtual_locked_pread( int fd, void *addr, size_t size, off_t offset )
{
sigset_t sigset;
BOOL has_write_watch = FALSE;
int err = EFAULT;
ssize_t ret = pread( fd, addr, size, offset );
if (ret != -1 || errno != EFAULT) return ret;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!check_write_access( addr, size, &has_write_watch ))
{
ret = pread( fd, addr, size, offset );
err = errno;
if (has_write_watch) update_write_watches( addr, size, max( 0, ret ));
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
errno = err;
return ret;
}
/***********************************************************************
* __wine_locked_recvmsg
*/
ssize_t CDECL __wine_locked_recvmsg( int fd, struct msghdr *hdr, int flags )
{
sigset_t sigset;
size_t i;
BOOL has_write_watch = FALSE;
int err = EFAULT;
ssize_t ret = recvmsg( fd, hdr, flags );
if (ret != -1 || errno != EFAULT) return ret;
server_enter_uninterrupted_section( &csVirtual, &sigset );
for (i = 0; i < hdr->msg_iovlen; i++)
if (check_write_access( hdr->msg_iov[i].iov_base, hdr->msg_iov[i].iov_len, &has_write_watch ))
break;
if (i == hdr->msg_iovlen)
{
ret = recvmsg( fd, hdr, flags );
err = errno;
}
if (has_write_watch)
while (i--) update_write_watches( hdr->msg_iov[i].iov_base, hdr->msg_iov[i].iov_len, 0 );
server_leave_uninterrupted_section( &csVirtual, &sigset );
errno = err;
return ret;
}
/***********************************************************************
* virtual_is_valid_code_address
*/
BOOL virtual_is_valid_code_address( const void *addr, SIZE_T size )
{
struct file_view *view;
BOOL ret = FALSE;
sigset_t sigset;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((view = VIRTUAL_FindView( addr, size )))
ret = !(view->protect & VPROT_SYSTEM); /* system views are not visible to the app */
server_leave_uninterrupted_section( &csVirtual, &sigset );
return ret;
}
/***********************************************************************
* virtual_handle_stack_fault
*
* Handle an access fault inside the current thread stack.
* Called from inside a signal handler.
*/
BOOL virtual_handle_stack_fault( void *addr )
{
BOOL ret = FALSE;
RtlEnterCriticalSection( &csVirtual ); /* no need for signal masking inside signal handler */
if (get_page_vprot( addr ) & VPROT_GUARD)
{
char *page = ROUND_ADDR( addr, page_mask );
set_page_vprot_bits( page, page_size, 0, VPROT_GUARD );
mprotect_range( page, page_size, 0, 0 );
NtCurrentTeb()->Tib.StackLimit = page;
if (page >= (char *)NtCurrentTeb()->DeallocationStack + 2*page_size)
{
page -= page_size;
set_page_vprot_bits( page, page_size, VPROT_COMMITTED | VPROT_GUARD, 0 );
mprotect_range( page, page_size, 0, 0 );
}
ret = TRUE;
}
RtlLeaveCriticalSection( &csVirtual );
return ret;
}
/***********************************************************************
* virtual_check_buffer_for_read
*
* Check if a memory buffer can be read, triggering page faults if needed for DIB section access.
*/
BOOL virtual_check_buffer_for_read( const void *ptr, SIZE_T size )
{
if (!size) return TRUE;
if (!ptr) return FALSE;
__TRY
{
volatile const char *p = ptr;
char dummy __attribute__((unused));
SIZE_T count = size;
while (count > page_size)
{
dummy = *p;
p += page_size;
count -= page_size;
}
dummy = p[0];
dummy = p[count - 1];
}
__EXCEPT_PAGE_FAULT
{
return FALSE;
}
__ENDTRY
return TRUE;
}
/***********************************************************************
* virtual_check_buffer_for_write
*
* Check if a memory buffer can be written to, triggering page faults if needed for write watches.
*/
BOOL virtual_check_buffer_for_write( void *ptr, SIZE_T size )
{
if (!size) return TRUE;
if (!ptr) return FALSE;
__TRY
{
volatile char *p = ptr;
SIZE_T count = size;
while (count > page_size)
{
*p |= 0;
p += page_size;
count -= page_size;
}
p[0] |= 0;
p[count - 1] |= 0;
}
__EXCEPT_PAGE_FAULT
{
return FALSE;
}
__ENDTRY
return TRUE;
}
/***********************************************************************
* virtual_uninterrupted_read_memory
*
* Similar to NtReadVirtualMemory, but without wineserver calls. Moreover
* permissions are checked before accessing each page, to ensure that no
* exceptions can happen.
*/
SIZE_T virtual_uninterrupted_read_memory( const void *addr, void *buffer, SIZE_T size )
{
struct file_view *view;
sigset_t sigset;
SIZE_T bytes_read = 0;
if (!size) return 0;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((view = VIRTUAL_FindView( addr, size )))
{
if (!(view->protect & VPROT_SYSTEM))
{
char *page = ROUND_ADDR( addr, page_mask );
while (bytes_read < size && (VIRTUAL_GetUnixProt( get_page_vprot( page )) & PROT_READ))
{
SIZE_T block_size = min( size, page_size - ((UINT_PTR)addr & page_mask) );
memcpy( buffer, addr, block_size );
addr = (const void *)((const char *)addr + block_size);
buffer = (void *)((char *)buffer + block_size);
bytes_read += block_size;
page += page_size;
}
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return bytes_read;
}
/***********************************************************************
* virtual_uninterrupted_write_memory
*
* Similar to NtWriteVirtualMemory, but without wineserver calls. Moreover
* permissions are checked before accessing each page, to ensure that no
* exceptions can happen.
*/
NTSTATUS virtual_uninterrupted_write_memory( void *addr, const void *buffer, SIZE_T size )
{
BOOL has_write_watch = FALSE;
sigset_t sigset;
NTSTATUS ret;
if (!size) return STATUS_SUCCESS;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!(ret = check_write_access( addr, size, &has_write_watch )))
{
memcpy( addr, buffer, size );
if (has_write_watch) update_write_watches( addr, size, size );
}
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;
WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct file_view, entry )
{
/* file mappings are always accessible */
BYTE commit = is_view_valloc( view ) ? 0 : VPROT_COMMITTED;
mprotect_range( view->base, view->size, commit, 0 );
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
}
struct free_range
{
char *base;
char *limit;
};
/* free reserved areas above the limit; callback for wine_mmap_enum_reserved_areas */
static int free_reserved_memory( void *base, size_t size, void *arg )
{
struct free_range *range = arg;
if ((char *)base >= range->limit) return 0;
if ((char *)base + size <= range->base) return 0;
if ((char *)base < range->base)
{
size -= range->base - (char *)base;
base = range->base;
}
if ((char *)base + size > range->limit) size = range->limit - (char *)base;
remove_reserved_area( base, size );
return 1; /* stop enumeration since the list has changed */
}
/***********************************************************************
* virtual_release_address_space
*
* Release some address space once we have loaded and initialized the app.
*/
void virtual_release_address_space(void)
{
struct free_range range;
sigset_t sigset;
if (is_win64) return;
server_enter_uninterrupted_section( &csVirtual, &sigset );
range.base = (char *)0x82000000;
range.limit = user_space_limit;
if (range.limit > range.base)
{
while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 1 )) /* nothing */;
}
else
{
#ifndef __APPLE__ /* dyld doesn't support parts of the WINE_DOS segment being unmapped */
range.base = (char *)0x20000000;
range.limit = (char *)0x7f000000;
while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 0 )) /* nothing */;
#endif
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
}
/***********************************************************************
* virtual_set_large_address_space
*
* Enable use of a large address space when allowed by the application.
*/
void virtual_set_large_address_space(void)
{
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE)) return;
/* no large address space on win9x */
if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
user_space_limit = working_set_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;
unsigned int vprot;
SIZE_T size = *size_ptr;
SIZE_T mask = get_mask( zero_bits );
NTSTATUS status = STATUS_SUCCESS;
BOOL is_dos_memory = FALSE;
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 (!mask) return STATUS_INVALID_PARAMETER_3;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
call.virtual_alloc.addr = wine_server_client_ptr( *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 = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_alloc.status == STATUS_SUCCESS)
{
*ret = wine_server_get_ptr( result.virtual_alloc.addr );
*size_ptr = result.virtual_alloc.size;
}
return result.virtual_alloc.status;
}
/* Round parameters to a page boundary */
if (is_beyond_limit( 0, size, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
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 ))
{
/* address 1 is magic to mean DOS area */
if (!base && *ret == (void *)1 && size == 0x110000) is_dos_memory = TRUE;
else return STATUS_INVALID_PARAMETER;
}
}
else
{
base = NULL;
size = (size + page_mask) & ~page_mask;
}
/* Compute the alloc type flags */
if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_RESET)) ||
(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;
}
/* Reserve the memory */
if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
if ((type & MEM_RESERVE) || !base)
{
if (!(status = get_vprot_flags( protect, &vprot, FALSE )))
{
if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
if (type & MEM_WRITE_WATCH) vprot |= VPROT_WRITEWATCH;
if (protect & PAGE_NOCACHE) vprot |= SEC_NOCACHE;
if (vprot & VPROT_WRITECOPY) status = STATUS_INVALID_PAGE_PROTECTION;
else if (is_dos_memory) status = allocate_dos_memory( &view, vprot );
else status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
if (status == STATUS_SUCCESS) base = view->base;
}
}
else if (type & MEM_RESET)
{
if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
else madvise( base, size, MADV_DONTNEED );
}
else /* commit the pages */
{
if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
else if (view->protect & SEC_FILE) status = STATUS_ALREADY_COMMITTED;
else if (!(status = set_protection( view, base, size, protect )) && (view->protect & SEC_RESERVE))
{
SERVER_START_REQ( add_mapping_committed_range )
{
req->base = wine_server_client_ptr( view->base );
req->offset = (char *)base - (char *)view->base;
req->size = size;
wine_server_call( req );
}
SERVER_END_REQ;
}
}
if (!status) VIRTUAL_DEBUG_DUMP_VIEW( view );
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 )
{
struct 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;
memset( &call, 0, sizeof(call) );
call.virtual_free.type = APC_VIRTUAL_FREE;
call.virtual_free.addr = wine_server_client_ptr( addr );
call.virtual_free.size = size;
call.virtual_free.op_type = type;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_free.status == STATUS_SUCCESS)
{
*addr_ptr = wine_server_get_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) return STATUS_INVALID_PARAMETER;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (!(view = VIRTUAL_FindView( base, size )) || !is_view_valloc( view ))
{
status = STATUS_INVALID_PARAMETER;
}
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 )
{
struct file_view *view;
sigset_t sigset;
NTSTATUS status = STATUS_SUCCESS;
char *base;
BYTE vprot;
SIZE_T size = *size_ptr;
LPVOID addr = *addr_ptr;
DWORD old;
TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
if (!old_prot)
return STATUS_ACCESS_VIOLATION;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.virtual_protect.type = APC_VIRTUAL_PROTECT;
call.virtual_protect.addr = wine_server_client_ptr( addr );
call.virtual_protect.size = size;
call.virtual_protect.prot = new_prot;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_protect.status == STATUS_SUCCESS)
{
*addr_ptr = wine_server_get_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, size )))
{
/* Make sure all the pages are committed */
if (get_committed_size( view, base, &vprot ) >= size && (vprot & VPROT_COMMITTED))
{
old = VIRTUAL_GetWin32Prot( vprot, view->protect );
status = set_protection( view, base, size, new_prot );
}
else status = STATUS_NOT_COMMITTED;
}
else status = STATUS_INVALID_PARAMETER;
if (!status) VIRTUAL_DEBUG_DUMP_VIEW( view );
server_leave_uninterrupted_section( &csVirtual, &sigset );
if (status == STATUS_SUCCESS)
{
*addr_ptr = base;
*size_ptr = size;
*old_prot = old;
}
return status;
}
/* retrieve state for a free memory area; callback for wine_mmap_enum_reserved_areas */
static int get_free_mem_state_callback( void *start, size_t size, void *arg )
{
MEMORY_BASIC_INFORMATION *info = arg;
void *end = (char *)start + size;
if ((char *)info->BaseAddress + info->RegionSize < (char *)start) return 0;
if (info->BaseAddress >= end)
{
if (info->AllocationBase < end) info->AllocationBase = end;
return 0;
}
if (info->BaseAddress >= start || start <= address_space_start)
{
/* it's a real free area */
info->State = MEM_FREE;
info->Protect = PAGE_NOACCESS;
info->AllocationBase = 0;
info->AllocationProtect = 0;
info->Type = 0;
if ((char *)info->BaseAddress + info->RegionSize > (char *)end)
info->RegionSize = (char *)end - (char *)info->BaseAddress;
}
else /* outside of the reserved area, pretend it's allocated */
{
info->RegionSize = (char *)start - (char *)info->BaseAddress;
info->State = MEM_RESERVE;
info->Protect = PAGE_NOACCESS;
info->AllocationProtect = PAGE_NOACCESS;
info->Type = MEM_PRIVATE;
}
return 1;
}
#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 )
{
struct file_view *view;
char *base, *alloc_base = 0, *alloc_end = working_set_limit;
struct wine_rb_entry *ptr;
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 (process != NtCurrentProcess())
{
NTSTATUS status;
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.virtual_query.type = APC_VIRTUAL_QUERY;
call.virtual_query.addr = wine_server_client_ptr( addr );
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_query.status == STATUS_SUCCESS)
{
info->BaseAddress = wine_server_get_ptr( result.virtual_query.base );
info->AllocationBase = wine_server_get_ptr( result.virtual_query.alloc_base );
info->RegionSize = result.virtual_query.size;
info->Protect = result.virtual_query.prot;
info->AllocationProtect = result.virtual_query.alloc_prot;
info->State = (DWORD)result.virtual_query.state << 12;
info->Type = (DWORD)result.virtual_query.alloc_type << 16;
if (info->RegionSize != result.virtual_query.size) /* truncated */
return STATUS_INVALID_PARAMETER; /* FIXME */
if (res_len) *res_len = sizeof(*info);
}
return result.virtual_query.status;
}
base = ROUND_ADDR( addr, page_mask );
if (is_beyond_limit( base, 1, working_set_limit )) return STATUS_INVALID_PARAMETER;
/* Find the view containing the address */
server_enter_uninterrupted_section( &csVirtual, &sigset );
ptr = views_tree.root;
while (ptr)
{
view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
if ((char *)view->base > base)
{
alloc_end = view->base;
ptr = ptr->left;
}
else if ((char *)view->base + view->size <= base)
{
alloc_base = (char *)view->base + view->size;
ptr = ptr->right;
}
else
{
alloc_base = view->base;
alloc_end = (char *)view->base + view->size;
break;
}
}
/* Fill the info structure */
info->AllocationBase = alloc_base;
info->BaseAddress = base;
info->RegionSize = alloc_end - base;
if (!ptr)
{
if (!wine_mmap_enum_reserved_areas( get_free_mem_state_callback, info, 0 ))
{
/* not in a reserved area at all, pretend it's allocated */
#ifdef __i386__
if (base >= (char *)address_space_start)
{
info->State = MEM_RESERVE;
info->Protect = PAGE_NOACCESS;
info->AllocationProtect = PAGE_NOACCESS;
info->Type = MEM_PRIVATE;
}
else
#endif
{
info->State = MEM_FREE;
info->Protect = PAGE_NOACCESS;
info->AllocationBase = 0;
info->AllocationProtect = 0;
info->Type = 0;
}
}
}
else
{
BYTE vprot;
char *ptr;
SIZE_T range_size = get_committed_size( view, base, &vprot );
info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
info->Protect = (vprot & VPROT_COMMITTED) ? VIRTUAL_GetWin32Prot( vprot, view->protect ) : 0;
info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect, view->protect );
if (view->protect & SEC_IMAGE) info->Type = MEM_IMAGE;
else if (view->protect & (SEC_FILE | SEC_RESERVE | SEC_COMMIT)) info->Type = MEM_MAPPED;
else info->Type = MEM_PRIVATE;
for (ptr = base; ptr < base + range_size; ptr += page_size)
if ((get_page_vprot( ptr ) ^ vprot) & ~VPROT_WRITEWATCH) break;
info->RegionSize = ptr - base;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
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;
memset( &call, 0, sizeof(call) );
call.virtual_lock.type = APC_VIRTUAL_LOCK;
call.virtual_lock.addr = wine_server_client_ptr( *addr );
call.virtual_lock.size = *size;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_lock.status == STATUS_SUCCESS)
{
*addr = wine_server_get_ptr( 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;
memset( &call, 0, sizeof(call) );
call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
call.virtual_unlock.addr = wine_server_client_ptr( *addr );
call.virtual_unlock.size = *size;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_unlock.status == STATUS_SUCCESS)
{
*addr = wine_server_get_ptr( 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;
unsigned int vprot, file_access = 0;
data_size_t len;
struct object_attributes *objattr;
if ((ret = get_vprot_flags( protect, &vprot, sec_flags & SEC_IMAGE ))) return ret;
if ((ret = alloc_object_attributes( attr, &objattr, &len ))) return ret;
if (vprot & VPROT_READ) file_access |= FILE_READ_DATA;
if (vprot & VPROT_WRITE) file_access |= FILE_WRITE_DATA;
SERVER_START_REQ( create_mapping )
{
req->access = access;
req->flags = sec_flags;
req->file_handle = wine_server_obj_handle( file );
req->file_access = file_access;
req->size = size ? size->QuadPart : 0;
wine_server_add_data( req, objattr, len );
ret = wine_server_call( req );
*handle = wine_server_ptr_handle( reply->handle );
}
SERVER_END_REQ;
RtlFreeHeap( GetProcessHeap(), 0, objattr );
return ret;
}
/***********************************************************************
* NtOpenSection (NTDLL.@)
* ZwOpenSection (NTDLL.@)
*/
NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
{
NTSTATUS ret;
if ((ret = validate_open_object_attributes( attr ))) return ret;
SERVER_START_REQ( open_mapping )
{
req->access = access;
req->attributes = attr->Attributes;
req->rootdir = wine_server_obj_handle( attr->RootDirectory );
if (attr->ObjectName)
wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
ret = wine_server_call( req );
*handle = wine_server_ptr_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 mask = get_mask( zero_bits );
pe_image_info_t image_info;
LARGE_INTEGER offset;
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_ptr, protect );
/* Check parameters */
if ((*addr_ptr && zero_bits) || !mask)
return STATUS_INVALID_PARAMETER_4;
#ifndef _WIN64
if (!is_wow64 && (alloc_type & AT_ROUND_TO_PAGE))
{
*addr_ptr = ROUND_ADDR( *addr_ptr, page_mask );
mask = page_mask;
}
#endif
if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
return STATUS_MAPPED_ALIGNMENT;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.map_view.type = APC_MAP_VIEW;
call.map_view.handle = wine_server_obj_handle( handle );
call.map_view.addr = wine_server_client_ptr( *addr_ptr );
call.map_view.size = *size_ptr;
call.map_view.offset = offset.QuadPart;
call.map_view.zero_bits = zero_bits;
call.map_view.alloc_type = alloc_type;
call.map_view.prot = protect;
res = server_queue_process_apc( process, &call, &result );
if (res != STATUS_SUCCESS) return res;
if ((NTSTATUS)result.map_view.status >= 0)
{
*addr_ptr = wine_server_get_ptr( result.map_view.addr );
*size_ptr = result.map_view.size;
}
return result.map_view.status;
}
return virtual_map_section( handle, addr_ptr, zero_bits, commit_size,
offset_ptr, size_ptr, protect, &image_info );
}
/***********************************************************************
* NtUnmapViewOfSection (NTDLL.@)
* ZwUnmapViewOfSection (NTDLL.@)
*/
NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
{
struct file_view *view;
NTSTATUS status = STATUS_NOT_MAPPED_VIEW;
sigset_t sigset;
if (process != NtCurrentProcess())
{
apc_call_t call;
apc_result_t result;
memset( &call, 0, sizeof(call) );
call.unmap_view.type = APC_UNMAP_VIEW;
call.unmap_view.addr = wine_server_client_ptr( addr );
status = server_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( addr, 0 )) && !is_view_valloc( view ))
{
if (!(view->protect & VPROT_SYSTEM))
{
SERVER_START_REQ( unmap_view )
{
req->base = wine_server_client_ptr( view->base );
status = wine_server_call( req );
}
SERVER_END_REQ;
if (!status) delete_view( view );
else FIXME( "failed to unmap %p %x\n", view->base, status );
}
else
{
delete_view( view );
status = STATUS_SUCCESS;
}
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/******************************************************************************
* NtQuerySection (NTDLL.@)
* ZwQuerySection (NTDLL.@)
*/
NTSTATUS WINAPI NtQuerySection( HANDLE handle, SECTION_INFORMATION_CLASS class, void *ptr,
SIZE_T size, SIZE_T *ret_size )
{
NTSTATUS status;
pe_image_info_t image_info;
switch (class)
{
case SectionBasicInformation:
if (size < sizeof(SECTION_BASIC_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
break;
case SectionImageInformation:
if (size < sizeof(SECTION_IMAGE_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
break;
default:
FIXME( "class %u not implemented\n", class );
return STATUS_NOT_IMPLEMENTED;
}
if (!ptr) return STATUS_ACCESS_VIOLATION;
SERVER_START_REQ( get_mapping_info )
{
req->handle = wine_server_obj_handle( handle );
req->access = SECTION_QUERY;
wine_server_set_reply( req, &image_info, sizeof(image_info) );
if (!(status = wine_server_call( req )))
{
if (class == SectionBasicInformation)
{
SECTION_BASIC_INFORMATION *info = ptr;
info->Attributes = reply->flags;
info->BaseAddress = NULL;
info->Size.QuadPart = reply->size;
if (ret_size) *ret_size = sizeof(*info);
}
else if (reply->flags & SEC_IMAGE)
{
SECTION_IMAGE_INFORMATION *info = ptr;
info->TransferAddress = wine_server_get_ptr( image_info.entry_point );
info->ZeroBits = image_info.zerobits;
info->MaximumStackSize = image_info.stack_size;
info->CommittedStackSize = image_info.stack_commit;
info->SubSystemType = image_info.subsystem;
info->SubsystemVersionLow = image_info.subsystem_low;
info->SubsystemVersionHigh = image_info.subsystem_high;
info->GpValue = image_info.gp;
info->ImageCharacteristics = image_info.image_charact;
info->DllCharacteristics = image_info.dll_charact;
info->Machine = image_info.machine;
info->ImageContainsCode = image_info.contains_code;
info->u.ImageFlags = image_info.image_flags;
info->LoaderFlags = image_info.loader_flags;
info->ImageFileSize = image_info.file_size;
info->CheckSum = image_info.checksum;
if (ret_size) *ret_size = sizeof(*info);
#ifndef _WIN64 /* don't return 64-bit values to 32-bit processes */
if (image_info.machine == IMAGE_FILE_MACHINE_AMD64 ||
image_info.machine == IMAGE_FILE_MACHINE_ARM64)
{
info->TransferAddress = (void *)0x81231234; /* sic */
info->MaximumStackSize = 0x100000;
info->CommittedStackSize = 0x10000;
}
#endif
}
else status = STATUS_SECTION_NOT_IMAGE;
}
}
SERVER_END_REQ;
return status;
}
/***********************************************************************
* NtFlushVirtualMemory (NTDLL.@)
* ZwFlushVirtualMemory (NTDLL.@)
*/
NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
SIZE_T *size_ptr, ULONG unknown )
{
struct 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;
memset( &call, 0, sizeof(call) );
call.virtual_flush.type = APC_VIRTUAL_FLUSH;
call.virtual_flush.addr = wine_server_client_ptr( addr );
call.virtual_flush.size = *size_ptr;
status = server_queue_process_apc( process, &call, &result );
if (status != STATUS_SUCCESS) return status;
if (result.virtual_flush.status == STATUS_SUCCESS)
{
*addr_ptr = wine_server_get_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, *size_ptr ))) status = STATUS_INVALID_PARAMETER;
else
{
if (!*size_ptr) *size_ptr = view->size;
*addr_ptr = addr;
#ifdef MS_ASYNC
if (msync( addr, *size_ptr, MS_ASYNC )) status = STATUS_NOT_MAPPED_DATA;
#endif
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* NtGetWriteWatch (NTDLL.@)
* ZwGetWriteWatch (NTDLL.@)
*/
NTSTATUS WINAPI NtGetWriteWatch( HANDLE process, ULONG flags, PVOID base, SIZE_T size, PVOID *addresses,
ULONG_PTR *count, ULONG *granularity )
{
NTSTATUS status = STATUS_SUCCESS;
sigset_t sigset;
size = ROUND_SIZE( base, size );
base = ROUND_ADDR( base, page_mask );
if (!count || !granularity) return STATUS_ACCESS_VIOLATION;
if (!*count || !size) return STATUS_INVALID_PARAMETER;
if (flags & ~WRITE_WATCH_FLAG_RESET) return STATUS_INVALID_PARAMETER;
if (!addresses) return STATUS_ACCESS_VIOLATION;
TRACE( "%p %x %p-%p %p %lu\n", process, flags, base, (char *)base + size,
addresses, *count );
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (is_write_watch_range( base, size ))
{
ULONG_PTR pos = 0;
char *addr = base;
char *end = addr + size;
while (pos < *count && addr < end)
{
if (!(get_page_vprot( addr ) & VPROT_WRITEWATCH)) addresses[pos++] = addr;
addr += page_size;
}
if (flags & WRITE_WATCH_FLAG_RESET) reset_write_watches( base, addr - (char *)base );
*count = pos;
*granularity = page_size;
}
else status = STATUS_INVALID_PARAMETER;
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
/***********************************************************************
* NtResetWriteWatch (NTDLL.@)
* ZwResetWriteWatch (NTDLL.@)
*/
NTSTATUS WINAPI NtResetWriteWatch( HANDLE process, PVOID base, SIZE_T size )
{
NTSTATUS status = STATUS_SUCCESS;
sigset_t sigset;
size = ROUND_SIZE( base, size );
base = ROUND_ADDR( base, page_mask );
TRACE( "%p %p-%p\n", process, base, (char *)base + size );
if (!size) return STATUS_INVALID_PARAMETER;
server_enter_uninterrupted_section( &csVirtual, &sigset );
if (is_write_watch_range( base, size ))
reset_write_watches( base, size );
else
status = STATUS_INVALID_PARAMETER;
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;
if (virtual_check_buffer_for_write( buffer, size ))
{
SERVER_START_REQ( read_process_memory )
{
req->handle = wine_server_obj_handle( process );
req->addr = wine_server_client_ptr( addr );
wine_server_set_reply( req, buffer, size );
if ((status = wine_server_call( req ))) size = 0;
}
SERVER_END_REQ;
}
else
{
status = STATUS_ACCESS_VIOLATION;
size = 0;
}
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;
if (virtual_check_buffer_for_read( buffer, size ))
{
SERVER_START_REQ( write_process_memory )
{
req->handle = wine_server_obj_handle( process );
req->addr = wine_server_client_ptr( addr );
wine_server_add_data( req, buffer, size );
if ((status = wine_server_call( req ))) size = 0;
}
SERVER_END_REQ;
}
else
{
status = STATUS_PARTIAL_COPY;
size = 0;
}
if (bytes_written) *bytes_written = size;
return status;
}
/***********************************************************************
* NtAreMappedFilesTheSame (NTDLL.@)
* ZwAreMappedFilesTheSame (NTDLL.@)
*/
NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
{
struct file_view *view1, *view2;
NTSTATUS status;
sigset_t sigset;
TRACE("%p %p\n", addr1, addr2);
server_enter_uninterrupted_section( &csVirtual, &sigset );
view1 = VIRTUAL_FindView( addr1, 0 );
view2 = VIRTUAL_FindView( addr2, 0 );
if (!view1 || !view2)
status = STATUS_INVALID_ADDRESS;
else if (is_view_valloc( view1 ) || is_view_valloc( view2 ))
status = STATUS_CONFLICTING_ADDRESSES;
else if (view1 == view2)
status = STATUS_SUCCESS;
else if ((view1->protect & VPROT_SYSTEM) || (view2->protect & VPROT_SYSTEM))
status = STATUS_NOT_SAME_DEVICE;
else
{
SERVER_START_REQ( is_same_mapping )
{
req->base1 = wine_server_client_ptr( view1->base );
req->base2 = wine_server_client_ptr( view2->base );
status = wine_server_call( req );
}
SERVER_END_REQ;
}
server_leave_uninterrupted_section( &csVirtual, &sigset );
return status;
}
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