447 lines
15 KiB
C
447 lines
15 KiB
C
/*
|
|
* Server-side file mapping management
|
|
*
|
|
* Copyright (C) 1999 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 <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
|
|
#include "ntstatus.h"
|
|
#define WIN32_NO_STATUS
|
|
#include "windef.h"
|
|
#include "winternl.h"
|
|
|
|
#include "file.h"
|
|
#include "handle.h"
|
|
#include "thread.h"
|
|
#include "request.h"
|
|
|
|
struct mapping
|
|
{
|
|
struct object obj; /* object header */
|
|
file_pos_t size; /* mapping size */
|
|
int protect; /* protection flags */
|
|
struct file *file; /* file mapped */
|
|
int header_size; /* size of headers (for PE image mapping) */
|
|
void *base; /* default base addr (for PE image mapping) */
|
|
struct file *shared_file; /* temp file for shared PE mapping */
|
|
int shared_size; /* shared mapping total size */
|
|
struct list shared_entry; /* entry in global shared PE mappings list */
|
|
};
|
|
|
|
static void mapping_dump( struct object *obj, int verbose );
|
|
static struct fd *mapping_get_fd( struct object *obj );
|
|
static unsigned int mapping_map_access( struct object *obj, unsigned int access );
|
|
static void mapping_destroy( struct object *obj );
|
|
|
|
static const struct object_ops mapping_ops =
|
|
{
|
|
sizeof(struct mapping), /* size */
|
|
mapping_dump, /* dump */
|
|
no_add_queue, /* add_queue */
|
|
NULL, /* remove_queue */
|
|
NULL, /* signaled */
|
|
NULL, /* satisfied */
|
|
no_signal, /* signal */
|
|
mapping_get_fd, /* get_fd */
|
|
mapping_map_access, /* map_access */
|
|
no_lookup_name, /* lookup_name */
|
|
fd_close_handle, /* close_handle */
|
|
mapping_destroy /* destroy */
|
|
};
|
|
|
|
static struct list shared_list = LIST_INIT(shared_list);
|
|
|
|
#ifdef __i386__
|
|
|
|
/* These are always the same on an i386, and it will be faster this way */
|
|
# define page_mask 0xfff
|
|
# define page_shift 12
|
|
# define init_page_size() do { /* nothing */ } while(0)
|
|
|
|
#else /* __i386__ */
|
|
|
|
static int page_shift, page_mask;
|
|
|
|
static void init_page_size(void)
|
|
{
|
|
int page_size;
|
|
# ifdef HAVE_GETPAGESIZE
|
|
page_size = getpagesize();
|
|
# else
|
|
# ifdef __svr4__
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
# else
|
|
# error Cannot get the page size on this platform
|
|
# endif
|
|
# endif
|
|
page_mask = page_size - 1;
|
|
/* Make sure we have a power of 2 */
|
|
assert( !(page_size & page_mask) );
|
|
page_shift = 0;
|
|
while ((1 << page_shift) != page_size) page_shift++;
|
|
}
|
|
#endif /* __i386__ */
|
|
|
|
#define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
|
|
|
|
|
|
/* find the shared PE mapping for a given mapping */
|
|
static struct file *get_shared_file( struct mapping *mapping )
|
|
{
|
|
struct mapping *ptr;
|
|
|
|
LIST_FOR_EACH_ENTRY( ptr, &shared_list, struct mapping, shared_entry )
|
|
if (is_same_file( ptr->file, mapping->file ))
|
|
return (struct file *)grab_object( ptr->shared_file );
|
|
return NULL;
|
|
}
|
|
|
|
/* return the size of the memory mapping of a given section */
|
|
static inline unsigned int get_section_map_size( const IMAGE_SECTION_HEADER *sec )
|
|
{
|
|
if (!sec->Misc.VirtualSize) return ROUND_SIZE( sec->SizeOfRawData );
|
|
else return ROUND_SIZE( sec->Misc.VirtualSize );
|
|
}
|
|
|
|
/* return the size of the file mapping of a given section */
|
|
static inline unsigned int get_section_filemap_size( const IMAGE_SECTION_HEADER *sec )
|
|
{
|
|
if (!sec->Misc.VirtualSize) return sec->SizeOfRawData;
|
|
else return min( sec->SizeOfRawData, ROUND_SIZE( sec->Misc.VirtualSize ) );
|
|
}
|
|
|
|
/* allocate and fill the temp file for a shared PE image mapping */
|
|
static int build_shared_mapping( struct mapping *mapping, int fd,
|
|
IMAGE_SECTION_HEADER *sec, unsigned int nb_sec )
|
|
{
|
|
unsigned int i, size, max_size, total_size;
|
|
off_t shared_pos, read_pos, write_pos;
|
|
char *buffer = NULL;
|
|
int shared_fd;
|
|
long toread;
|
|
|
|
/* compute the total size of the shared mapping */
|
|
|
|
total_size = max_size = 0;
|
|
for (i = 0; i < nb_sec; i++)
|
|
{
|
|
if ((sec[i].Characteristics & IMAGE_SCN_MEM_SHARED) &&
|
|
(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE))
|
|
{
|
|
size = get_section_filemap_size( &sec[i] );
|
|
if (size > max_size) max_size = size;
|
|
total_size += get_section_map_size( &sec[i] );
|
|
}
|
|
}
|
|
if (!(mapping->shared_size = total_size)) return 1; /* nothing to do */
|
|
|
|
if ((mapping->shared_file = get_shared_file( mapping ))) return 1;
|
|
|
|
/* create a temp file for the mapping */
|
|
|
|
if (!(mapping->shared_file = create_temp_file( FILE_GENERIC_READ|FILE_GENERIC_WRITE ))) return 0;
|
|
if (!grow_file( mapping->shared_file, total_size )) goto error;
|
|
if ((shared_fd = get_file_unix_fd( mapping->shared_file )) == -1) goto error;
|
|
|
|
if (!(buffer = malloc( max_size ))) goto error;
|
|
|
|
/* copy the shared sections data into the temp file */
|
|
|
|
shared_pos = 0;
|
|
for (i = 0; i < nb_sec; i++)
|
|
{
|
|
if (!(sec[i].Characteristics & IMAGE_SCN_MEM_SHARED)) continue;
|
|
if (!(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) continue;
|
|
write_pos = shared_pos;
|
|
shared_pos += get_section_map_size( &sec[i] );
|
|
read_pos = sec[i].PointerToRawData;
|
|
size = get_section_filemap_size( &sec[i] );
|
|
if (!read_pos || !size) continue;
|
|
toread = size;
|
|
while (toread)
|
|
{
|
|
long res = pread( fd, buffer + sec[i].SizeOfRawData - toread, toread, read_pos );
|
|
if (res <= 0) goto error;
|
|
toread -= res;
|
|
read_pos += res;
|
|
}
|
|
if (pwrite( shared_fd, buffer, size, write_pos ) != size) goto error;
|
|
}
|
|
free( buffer );
|
|
return 1;
|
|
|
|
error:
|
|
release_object( mapping->shared_file );
|
|
mapping->shared_file = NULL;
|
|
free( buffer );
|
|
return 0;
|
|
}
|
|
|
|
/* retrieve the mapping parameters for an executable (PE) image */
|
|
static int get_image_params( struct mapping *mapping )
|
|
{
|
|
IMAGE_DOS_HEADER dos;
|
|
IMAGE_NT_HEADERS nt;
|
|
IMAGE_SECTION_HEADER *sec = NULL;
|
|
struct fd *fd;
|
|
off_t pos;
|
|
int unix_fd, size, toread;
|
|
|
|
/* load the headers */
|
|
|
|
if (!(fd = mapping_get_fd( &mapping->obj ))) return 0;
|
|
if ((unix_fd = get_unix_fd( fd )) == -1) goto error;
|
|
if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) goto error;
|
|
if (dos.e_magic != IMAGE_DOS_SIGNATURE) goto error;
|
|
pos = dos.e_lfanew;
|
|
|
|
if (pread( unix_fd, &nt.Signature, sizeof(nt.Signature), pos ) != sizeof(nt.Signature))
|
|
goto error;
|
|
pos += sizeof(nt.Signature);
|
|
if (nt.Signature != IMAGE_NT_SIGNATURE) goto error;
|
|
if (pread( unix_fd, &nt.FileHeader, sizeof(nt.FileHeader), pos ) != sizeof(nt.FileHeader))
|
|
goto error;
|
|
pos += sizeof(nt.FileHeader);
|
|
/* zero out Optional header in the case it's not present or partial */
|
|
memset(&nt.OptionalHeader, 0, sizeof(nt.OptionalHeader));
|
|
toread = min( sizeof(nt.OptionalHeader), nt.FileHeader.SizeOfOptionalHeader );
|
|
if (pread( unix_fd, &nt.OptionalHeader, toread, pos ) != toread) goto error;
|
|
pos += nt.FileHeader.SizeOfOptionalHeader;
|
|
|
|
/* load the section headers */
|
|
|
|
size = sizeof(*sec) * nt.FileHeader.NumberOfSections;
|
|
if (!(sec = malloc( size ))) goto error;
|
|
if (pread( unix_fd, sec, size, pos ) != size) goto error;
|
|
|
|
if (!build_shared_mapping( mapping, unix_fd, sec, nt.FileHeader.NumberOfSections )) goto error;
|
|
|
|
if (mapping->shared_file) list_add_head( &shared_list, &mapping->shared_entry );
|
|
|
|
mapping->size = ROUND_SIZE( nt.OptionalHeader.SizeOfImage );
|
|
mapping->base = (void *)nt.OptionalHeader.ImageBase;
|
|
mapping->header_size = max( pos + size, nt.OptionalHeader.SizeOfHeaders );
|
|
mapping->protect = VPROT_IMAGE;
|
|
|
|
/* sanity check */
|
|
if (pos + size > mapping->size) goto error;
|
|
|
|
free( sec );
|
|
release_object( fd );
|
|
return 1;
|
|
|
|
error:
|
|
free( sec );
|
|
release_object( fd );
|
|
set_error( STATUS_INVALID_FILE_FOR_SECTION );
|
|
return 0;
|
|
}
|
|
|
|
/* get the size of the unix file associated with the mapping */
|
|
inline static int get_file_size( struct file *file, file_pos_t *size )
|
|
{
|
|
struct stat st;
|
|
int unix_fd = get_file_unix_fd( file );
|
|
|
|
if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) return 0;
|
|
*size = st.st_size;
|
|
return 1;
|
|
}
|
|
|
|
static struct object *create_mapping( struct directory *root, const struct unicode_str *name,
|
|
unsigned int attr, file_pos_t size, int protect,
|
|
obj_handle_t handle )
|
|
{
|
|
struct mapping *mapping;
|
|
int access = 0;
|
|
|
|
if (!page_mask) init_page_size();
|
|
|
|
if (!(mapping = create_named_object_dir( root, name, attr, &mapping_ops )))
|
|
return NULL;
|
|
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
|
|
return &mapping->obj; /* Nothing else to do */
|
|
|
|
mapping->header_size = 0;
|
|
mapping->base = NULL;
|
|
mapping->shared_file = NULL;
|
|
mapping->shared_size = 0;
|
|
|
|
if (protect & VPROT_READ) access |= FILE_READ_DATA;
|
|
if (protect & VPROT_WRITE) access |= FILE_WRITE_DATA;
|
|
|
|
if (handle)
|
|
{
|
|
if (!(mapping->file = get_file_obj( current->process, handle, access ))) goto error;
|
|
if (protect & VPROT_IMAGE)
|
|
{
|
|
if (!get_image_params( mapping )) goto error;
|
|
return &mapping->obj;
|
|
}
|
|
if (!size)
|
|
{
|
|
if (!get_file_size( mapping->file, &size )) goto error;
|
|
if (!size)
|
|
{
|
|
set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
|
|
goto error;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!grow_file( mapping->file, size )) goto error;
|
|
}
|
|
}
|
|
else /* Anonymous mapping (no associated file) */
|
|
{
|
|
if (!size || (protect & VPROT_IMAGE))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
mapping->file = NULL;
|
|
goto error;
|
|
}
|
|
if (!(mapping->file = create_temp_file( access ))) goto error;
|
|
if (!grow_file( mapping->file, size )) goto error;
|
|
}
|
|
mapping->size = (size + page_mask) & ~((file_pos_t)page_mask);
|
|
mapping->protect = protect;
|
|
return &mapping->obj;
|
|
|
|
error:
|
|
release_object( mapping );
|
|
return NULL;
|
|
}
|
|
|
|
static void mapping_dump( struct object *obj, int verbose )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
assert( obj->ops == &mapping_ops );
|
|
fprintf( stderr, "Mapping size=%08x%08x prot=%08x file=%p header_size=%08x base=%p "
|
|
"shared_file=%p shared_size=%08x ",
|
|
(unsigned int)(mapping->size >> 32), (unsigned int)mapping->size,
|
|
mapping->protect, mapping->file, mapping->header_size,
|
|
mapping->base, mapping->shared_file, mapping->shared_size );
|
|
dump_object_name( &mapping->obj );
|
|
fputc( '\n', stderr );
|
|
}
|
|
|
|
static struct fd *mapping_get_fd( struct object *obj )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
return get_obj_fd( (struct object *)mapping->file );
|
|
}
|
|
|
|
static unsigned int mapping_map_access( struct object *obj, unsigned int access )
|
|
{
|
|
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SECTION_QUERY | SECTION_MAP_READ;
|
|
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE;
|
|
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE;
|
|
if (access & GENERIC_ALL) access |= SECTION_ALL_ACCESS;
|
|
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
|
|
}
|
|
|
|
static void mapping_destroy( struct object *obj )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
assert( obj->ops == &mapping_ops );
|
|
if (mapping->file) release_object( mapping->file );
|
|
if (mapping->shared_file)
|
|
{
|
|
release_object( mapping->shared_file );
|
|
list_remove( &mapping->shared_entry );
|
|
}
|
|
}
|
|
|
|
int get_page_size(void)
|
|
{
|
|
if (!page_mask) init_page_size();
|
|
return page_mask + 1;
|
|
}
|
|
|
|
/* create a file mapping */
|
|
DECL_HANDLER(create_mapping)
|
|
{
|
|
struct object *obj;
|
|
struct unicode_str name;
|
|
struct directory *root = NULL;
|
|
file_pos_t size = ((file_pos_t)req->size_high << 32) | req->size_low;
|
|
|
|
reply->handle = 0;
|
|
get_req_unicode_str( &name );
|
|
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
|
|
return;
|
|
|
|
if ((obj = create_mapping( root, &name, req->attributes, size, req->protect, req->file_handle )))
|
|
{
|
|
reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
|
|
release_object( obj );
|
|
}
|
|
|
|
if (root) release_object( root );
|
|
}
|
|
|
|
/* open a handle to a mapping */
|
|
DECL_HANDLER(open_mapping)
|
|
{
|
|
struct unicode_str name;
|
|
struct directory *root = NULL;
|
|
struct mapping *mapping;
|
|
|
|
get_req_unicode_str( &name );
|
|
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
|
|
return;
|
|
|
|
if ((mapping = open_object_dir( root, &name, req->attributes, &mapping_ops )))
|
|
{
|
|
reply->handle = alloc_handle( current->process, &mapping->obj, req->access, req->attributes );
|
|
release_object( mapping );
|
|
}
|
|
|
|
if (root) release_object( root );
|
|
}
|
|
|
|
/* get a mapping information */
|
|
DECL_HANDLER(get_mapping_info)
|
|
{
|
|
struct mapping *mapping;
|
|
|
|
if ((mapping = (struct mapping *)get_handle_obj( current->process, req->handle,
|
|
0, &mapping_ops )))
|
|
{
|
|
reply->size_high = (unsigned int)(mapping->size >> 32);
|
|
reply->size_low = (unsigned int)mapping->size;
|
|
reply->protect = mapping->protect;
|
|
reply->header_size = mapping->header_size;
|
|
reply->base = mapping->base;
|
|
reply->shared_file = 0;
|
|
reply->shared_size = mapping->shared_size;
|
|
if (mapping->shared_file)
|
|
reply->shared_file = alloc_handle( current->process, mapping->shared_file,
|
|
GENERIC_READ|GENERIC_WRITE, 0 );
|
|
release_object( mapping );
|
|
}
|
|
}
|