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772 lines
25 KiB
C
772 lines
25 KiB
C
/*
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* Server-side file mapping management
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*
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* Copyright (C) 1999 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#include <unistd.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "file.h"
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#include "handle.h"
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#include "thread.h"
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#include "request.h"
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#include "security.h"
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/* list of memory ranges, used to store committed info */
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struct ranges
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{
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unsigned int count;
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unsigned int max;
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struct range
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{
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file_pos_t start;
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file_pos_t end;
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} ranges[1];
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};
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struct mapping
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{
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struct object obj; /* object header */
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mem_size_t size; /* mapping size */
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int protect; /* protection flags */
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struct fd *fd; /* fd for mapped file */
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int header_size; /* size of headers (for PE image mapping) */
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client_ptr_t base; /* default base addr (for PE image mapping) */
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struct ranges *committed; /* list of committed ranges in this mapping */
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struct file *shared_file; /* temp file for shared PE mapping */
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struct list shared_entry; /* entry in global shared PE mappings list */
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};
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static void mapping_dump( struct object *obj, int verbose );
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static struct object_type *mapping_get_type( struct object *obj );
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static struct fd *mapping_get_fd( struct object *obj );
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static unsigned int mapping_map_access( struct object *obj, unsigned int access );
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static void mapping_destroy( struct object *obj );
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static enum server_fd_type mapping_get_fd_type( struct fd *fd );
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static const struct object_ops mapping_ops =
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{
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sizeof(struct mapping), /* size */
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mapping_dump, /* dump */
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mapping_get_type, /* get_type */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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no_signal, /* signal */
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mapping_get_fd, /* get_fd */
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mapping_map_access, /* map_access */
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default_get_sd, /* get_sd */
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default_set_sd, /* set_sd */
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no_lookup_name, /* lookup_name */
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no_open_file, /* open_file */
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fd_close_handle, /* close_handle */
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mapping_destroy /* destroy */
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};
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static const struct fd_ops mapping_fd_ops =
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{
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default_fd_get_poll_events, /* get_poll_events */
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default_poll_event, /* poll_event */
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no_flush, /* flush */
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mapping_get_fd_type, /* get_fd_type */
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no_fd_ioctl, /* ioctl */
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no_fd_queue_async, /* queue_async */
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default_fd_reselect_async, /* reselect_async */
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default_fd_cancel_async /* cancel_async */
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};
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static struct list shared_list = LIST_INIT(shared_list);
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#ifdef __i386__
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/* These are always the same on an i386, and it will be faster this way */
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# define page_mask 0xfff
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# define page_shift 12
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# define init_page_size() do { /* nothing */ } while(0)
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#else /* __i386__ */
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static int page_shift, page_mask;
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static void init_page_size(void)
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{
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int page_size;
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# ifdef HAVE_GETPAGESIZE
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page_size = getpagesize();
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# else
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# ifdef __svr4__
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page_size = sysconf(_SC_PAGESIZE);
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# else
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# error Cannot get the page size on this platform
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# endif
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# endif
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page_mask = page_size - 1;
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/* Make sure we have a power of 2 */
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assert( !(page_size & page_mask) );
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page_shift = 0;
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while ((1 << page_shift) != page_size) page_shift++;
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}
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#endif /* __i386__ */
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#define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
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/* extend a file beyond the current end of file */
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static int grow_file( int unix_fd, file_pos_t new_size )
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{
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static const char zero;
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off_t size = new_size;
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if (sizeof(new_size) > sizeof(size) && size != new_size)
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{
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set_error( STATUS_INVALID_PARAMETER );
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return 0;
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}
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/* extend the file one byte beyond the requested size and then truncate it */
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/* this should work around ftruncate implementations that can't extend files */
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if (pwrite( unix_fd, &zero, 1, size ) != -1)
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{
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ftruncate( unix_fd, size );
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return 1;
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}
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file_set_error();
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return 0;
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}
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/* check if the current directory allows exec mappings */
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static int check_current_dir_for_exec(void)
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{
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int fd;
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char tmpfn[] = "anonmap.XXXXXX";
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void *ret = MAP_FAILED;
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fd = mkstemps( tmpfn, 0 );
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if (fd == -1) return 0;
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if (grow_file( fd, 1 ))
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{
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ret = mmap( NULL, get_page_size(), PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0 );
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if (ret != MAP_FAILED) munmap( ret, get_page_size() );
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}
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close( fd );
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unlink( tmpfn );
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return (ret != MAP_FAILED);
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}
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/* create a temp file for anonymous mappings */
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static int create_temp_file( file_pos_t size )
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{
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static int temp_dir_fd = -1;
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char tmpfn[] = "anonmap.XXXXXX";
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int fd;
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if (temp_dir_fd == -1)
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{
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temp_dir_fd = server_dir_fd;
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if (!check_current_dir_for_exec())
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{
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/* the server dir is noexec, try the config dir instead */
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fchdir( config_dir_fd );
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if (check_current_dir_for_exec())
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temp_dir_fd = config_dir_fd;
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else /* neither works, fall back to server dir */
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fchdir( server_dir_fd );
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}
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}
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else if (temp_dir_fd != server_dir_fd) fchdir( temp_dir_fd );
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fd = mkstemps( tmpfn, 0 );
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if (fd != -1)
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{
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if (!grow_file( fd, size ))
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{
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close( fd );
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fd = -1;
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}
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unlink( tmpfn );
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}
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else file_set_error();
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if (temp_dir_fd != server_dir_fd) fchdir( server_dir_fd );
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return fd;
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}
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/* find the shared PE mapping for a given mapping */
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static struct file *get_shared_file( struct mapping *mapping )
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{
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struct mapping *ptr;
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LIST_FOR_EACH_ENTRY( ptr, &shared_list, struct mapping, shared_entry )
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if (is_same_file_fd( ptr->fd, mapping->fd ))
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return (struct file *)grab_object( ptr->shared_file );
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return NULL;
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}
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/* return the size of the memory mapping and file range of a given section */
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static inline void get_section_sizes( const IMAGE_SECTION_HEADER *sec, size_t *map_size,
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off_t *file_start, size_t *file_size )
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{
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static const unsigned int sector_align = 0x1ff;
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if (!sec->Misc.VirtualSize) *map_size = ROUND_SIZE( sec->SizeOfRawData );
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else *map_size = ROUND_SIZE( sec->Misc.VirtualSize );
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*file_start = sec->PointerToRawData & ~sector_align;
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*file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
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if (*file_size > *map_size) *file_size = *map_size;
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}
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/* add a range to the committed list */
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static void add_committed_range( struct mapping *mapping, file_pos_t start, file_pos_t end )
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{
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unsigned int i, j;
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struct range *ranges;
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if (!mapping->committed) return; /* everything committed already */
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for (i = 0, ranges = mapping->committed->ranges; i < mapping->committed->count; i++)
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{
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if (ranges[i].start > end) break;
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if (ranges[i].end < start) continue;
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if (ranges[i].start > start) ranges[i].start = start; /* extend downwards */
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if (ranges[i].end < end) /* extend upwards and maybe merge with next */
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{
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for (j = i + 1; j < mapping->committed->count; j++)
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{
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if (ranges[j].start > end) break;
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if (ranges[j].end > end) end = ranges[j].end;
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}
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if (j > i + 1)
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{
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memmove( &ranges[i + 1], &ranges[j], (mapping->committed->count - j) * sizeof(*ranges) );
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mapping->committed->count -= j - (i + 1);
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}
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ranges[i].end = end;
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}
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return;
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}
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/* now add a new range */
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if (mapping->committed->count == mapping->committed->max)
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{
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unsigned int new_size = mapping->committed->max * 2;
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struct ranges *new_ptr = realloc( mapping->committed, offsetof( struct ranges, ranges[new_size] ));
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if (!new_ptr) return;
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new_ptr->max = new_size;
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ranges = new_ptr->ranges;
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mapping->committed = new_ptr;
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}
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memmove( &ranges[i + 1], &ranges[i], (mapping->committed->count - i) * sizeof(*ranges) );
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ranges[i].start = start;
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ranges[i].end = end;
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mapping->committed->count++;
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}
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/* find the range containing start and return whether it's committed */
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static int find_committed_range( struct mapping *mapping, file_pos_t start, mem_size_t *size )
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{
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unsigned int i;
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struct range *ranges;
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if (!mapping->committed) /* everything is committed */
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{
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*size = mapping->size - start;
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return 1;
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}
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for (i = 0, ranges = mapping->committed->ranges; i < mapping->committed->count; i++)
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{
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if (ranges[i].start > start)
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{
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*size = ranges[i].start - start;
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return 0;
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}
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if (ranges[i].end > start)
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{
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*size = ranges[i].end - start;
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return 1;
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}
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}
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*size = mapping->size - start;
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return 0;
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}
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/* allocate and fill the temp file for a shared PE image mapping */
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static int build_shared_mapping( struct mapping *mapping, int fd,
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IMAGE_SECTION_HEADER *sec, unsigned int nb_sec )
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{
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unsigned int i;
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mem_size_t total_size;
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size_t file_size, map_size, max_size;
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off_t shared_pos, read_pos, write_pos;
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char *buffer = NULL;
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int shared_fd;
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long toread;
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/* compute the total size of the shared mapping */
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total_size = max_size = 0;
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for (i = 0; i < nb_sec; i++)
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{
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if ((sec[i].Characteristics & IMAGE_SCN_MEM_SHARED) &&
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(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE))
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{
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get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
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if (file_size > max_size) max_size = file_size;
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total_size += map_size;
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}
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}
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if (!total_size) return 1; /* nothing to do */
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if ((mapping->shared_file = get_shared_file( mapping ))) return 1;
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/* create a temp file for the mapping */
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if ((shared_fd = create_temp_file( total_size )) == -1) return 0;
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if (!(mapping->shared_file = create_file_for_fd( shared_fd, FILE_GENERIC_READ|FILE_GENERIC_WRITE, 0 )))
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return 0;
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if (!(buffer = malloc( max_size ))) goto error;
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/* copy the shared sections data into the temp file */
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shared_pos = 0;
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for (i = 0; i < nb_sec; i++)
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{
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if (!(sec[i].Characteristics & IMAGE_SCN_MEM_SHARED)) continue;
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if (!(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) continue;
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get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
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write_pos = shared_pos;
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shared_pos += map_size;
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if (!sec[i].PointerToRawData || !file_size) continue;
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toread = file_size;
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while (toread)
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{
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long res = pread( fd, buffer + file_size - toread, toread, read_pos );
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if (!res && toread < 0x200) /* partial sector at EOF is not an error */
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{
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file_size -= toread;
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break;
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}
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if (res <= 0) goto error;
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toread -= res;
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read_pos += res;
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}
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if (pwrite( shared_fd, buffer, file_size, write_pos ) != file_size) goto error;
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}
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free( buffer );
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return 1;
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error:
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release_object( mapping->shared_file );
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mapping->shared_file = NULL;
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free( buffer );
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return 0;
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}
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/* retrieve the mapping parameters for an executable (PE) image */
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static int get_image_params( struct mapping *mapping, int unix_fd )
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{
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IMAGE_DOS_HEADER dos;
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IMAGE_SECTION_HEADER *sec = NULL;
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struct
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{
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DWORD Signature;
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IMAGE_FILE_HEADER FileHeader;
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union
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{
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IMAGE_OPTIONAL_HEADER32 hdr32;
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IMAGE_OPTIONAL_HEADER64 hdr64;
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} opt;
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} nt;
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off_t pos;
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int size;
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/* load the headers */
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if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) goto error;
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if (dos.e_magic != IMAGE_DOS_SIGNATURE) goto error;
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pos = dos.e_lfanew;
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size = pread( unix_fd, &nt, sizeof(nt), pos );
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if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) goto error;
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/* zero out Optional header in the case it's not present or partial */
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if (size < sizeof(nt)) memset( (char *)&nt + size, 0, sizeof(nt) - size );
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if (nt.Signature != IMAGE_NT_SIGNATURE) goto error;
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switch (nt.opt.hdr32.Magic)
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{
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case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
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mapping->size = ROUND_SIZE( nt.opt.hdr32.SizeOfImage );
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mapping->base = nt.opt.hdr32.ImageBase;
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mapping->header_size = nt.opt.hdr32.SizeOfHeaders;
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break;
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case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
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mapping->size = ROUND_SIZE( nt.opt.hdr64.SizeOfImage );
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mapping->base = nt.opt.hdr64.ImageBase;
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mapping->header_size = nt.opt.hdr64.SizeOfHeaders;
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break;
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default:
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goto error;
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}
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/* load the section headers */
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pos += sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader;
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size = sizeof(*sec) * nt.FileHeader.NumberOfSections;
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if (pos + size > mapping->size) goto error;
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if (pos + size > mapping->header_size) mapping->header_size = pos + size;
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if (!(sec = malloc( size ))) goto error;
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if (pread( unix_fd, sec, size, pos ) != size) goto error;
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if (!build_shared_mapping( mapping, unix_fd, sec, nt.FileHeader.NumberOfSections )) goto error;
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if (mapping->shared_file) list_add_head( &shared_list, &mapping->shared_entry );
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mapping->protect = VPROT_IMAGE;
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free( sec );
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return 1;
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error:
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free( sec );
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set_error( STATUS_INVALID_FILE_FOR_SECTION );
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return 0;
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}
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static struct object *create_mapping( struct directory *root, const struct unicode_str *name,
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unsigned int attr, mem_size_t size, int protect,
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obj_handle_t handle, const struct security_descriptor *sd )
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{
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struct mapping *mapping;
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struct file *file;
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struct fd *fd;
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int access = 0;
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int unix_fd;
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struct stat st;
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if (!page_mask) init_page_size();
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if (!(mapping = create_named_object_dir( root, name, attr, &mapping_ops )))
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return NULL;
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if (get_error() == STATUS_OBJECT_NAME_EXISTS)
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return &mapping->obj; /* Nothing else to do */
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if (sd) default_set_sd( &mapping->obj, sd, OWNER_SECURITY_INFORMATION|
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GROUP_SECURITY_INFORMATION|
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DACL_SECURITY_INFORMATION|
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SACL_SECURITY_INFORMATION );
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mapping->header_size = 0;
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mapping->base = 0;
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mapping->fd = NULL;
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mapping->shared_file = NULL;
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mapping->committed = NULL;
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if (protect & VPROT_READ) access |= FILE_READ_DATA;
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if (protect & VPROT_WRITE) access |= FILE_WRITE_DATA;
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if (handle)
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{
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const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
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unsigned int mapping_access = FILE_MAPPING_ACCESS;
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if (!(protect & VPROT_COMMITTED))
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{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
if (!(file = get_file_obj( current->process, handle, access ))) goto error;
|
|
fd = get_obj_fd( (struct object *)file );
|
|
|
|
/* file sharing rules for mappings are different so we use magic the access rights */
|
|
if (protect & VPROT_IMAGE) mapping_access |= FILE_MAPPING_IMAGE;
|
|
else if (protect & VPROT_WRITE) mapping_access |= FILE_MAPPING_WRITE;
|
|
|
|
if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing )))
|
|
{
|
|
mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT );
|
|
if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL );
|
|
}
|
|
release_object( file );
|
|
release_object( fd );
|
|
if (!mapping->fd) goto error;
|
|
|
|
if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error;
|
|
if (protect & VPROT_IMAGE)
|
|
{
|
|
if (!get_image_params( mapping, unix_fd )) goto error;
|
|
return &mapping->obj;
|
|
}
|
|
if (fstat( unix_fd, &st ) == -1)
|
|
{
|
|
file_set_error();
|
|
goto error;
|
|
}
|
|
if (!size)
|
|
{
|
|
if (!(size = st.st_size))
|
|
{
|
|
set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
|
|
goto error;
|
|
}
|
|
}
|
|
else if (st.st_size < size && !grow_file( unix_fd, size )) goto error;
|
|
}
|
|
else /* Anonymous mapping (no associated file) */
|
|
{
|
|
if (!size || (protect & VPROT_IMAGE))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
if (!(protect & VPROT_COMMITTED))
|
|
{
|
|
if (!(mapping->committed = mem_alloc( offsetof(struct ranges, ranges[8]) ))) goto error;
|
|
mapping->committed->count = 0;
|
|
mapping->committed->max = 8;
|
|
}
|
|
if ((unix_fd = create_temp_file( size )) == -1) goto error;
|
|
if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj,
|
|
FILE_SYNCHRONOUS_IO_NONALERT ))) goto error;
|
|
allow_fd_caching( mapping->fd );
|
|
}
|
|
mapping->size = (size + page_mask) & ~((mem_size_t)page_mask);
|
|
mapping->protect = protect;
|
|
return &mapping->obj;
|
|
|
|
error:
|
|
release_object( mapping );
|
|
return NULL;
|
|
}
|
|
|
|
struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle, unsigned int access )
|
|
{
|
|
return (struct mapping *)get_handle_obj( process, handle, access, &mapping_ops );
|
|
}
|
|
|
|
/* open a new file handle to the file backing the mapping */
|
|
obj_handle_t open_mapping_file( struct process *process, struct mapping *mapping,
|
|
unsigned int access, unsigned int sharing )
|
|
{
|
|
obj_handle_t handle;
|
|
struct file *file = create_file_for_fd_obj( mapping->fd, access, sharing );
|
|
|
|
if (!file) return 0;
|
|
handle = alloc_handle( process, file, access, 0 );
|
|
release_object( file );
|
|
return handle;
|
|
}
|
|
|
|
struct mapping *grab_mapping_unless_removable( struct mapping *mapping )
|
|
{
|
|
if (is_fd_removable( mapping->fd )) return NULL;
|
|
return (struct mapping *)grab_object( mapping );
|
|
}
|
|
|
|
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 fd=%p header_size=%08x base=%08lx "
|
|
"shared_file=%p ",
|
|
(unsigned int)(mapping->size >> 32), (unsigned int)mapping->size,
|
|
mapping->protect, mapping->fd, mapping->header_size,
|
|
(unsigned long)mapping->base, mapping->shared_file );
|
|
dump_object_name( &mapping->obj );
|
|
fputc( '\n', stderr );
|
|
}
|
|
|
|
static struct object_type *mapping_get_type( struct object *obj )
|
|
{
|
|
static const WCHAR name[] = {'S','e','c','t','i','o','n'};
|
|
static const struct unicode_str str = { name, sizeof(name) };
|
|
return get_object_type( &str );
|
|
}
|
|
|
|
static struct fd *mapping_get_fd( struct object *obj )
|
|
{
|
|
struct mapping *mapping = (struct mapping *)obj;
|
|
return (struct fd *)grab_object( mapping->fd );
|
|
}
|
|
|
|
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->fd) release_object( mapping->fd );
|
|
if (mapping->shared_file)
|
|
{
|
|
release_object( mapping->shared_file );
|
|
list_remove( &mapping->shared_entry );
|
|
}
|
|
free( mapping->committed );
|
|
}
|
|
|
|
static enum server_fd_type mapping_get_fd_type( struct fd *fd )
|
|
{
|
|
return FD_TYPE_FILE;
|
|
}
|
|
|
|
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;
|
|
const struct object_attributes *objattr = get_req_data();
|
|
const struct security_descriptor *sd;
|
|
|
|
reply->handle = 0;
|
|
|
|
if (!objattr_is_valid( objattr, get_req_data_size() ))
|
|
return;
|
|
|
|
sd = objattr->sd_len ? (const struct security_descriptor *)(objattr + 1) : NULL;
|
|
objattr_get_name( objattr, &name );
|
|
|
|
if (objattr->rootdir && !(root = get_directory_obj( current->process, objattr->rootdir, 0 )))
|
|
return;
|
|
|
|
if ((obj = create_mapping( root, &name, req->attributes, req->size, req->protect, req->file_handle, sd )))
|
|
{
|
|
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
|
|
reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
|
|
else
|
|
reply->handle = alloc_handle_no_access_check( 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;
|
|
struct fd *fd;
|
|
|
|
if ((mapping = get_mapping_obj( current->process, req->handle, req->access )))
|
|
{
|
|
reply->size = mapping->size;
|
|
reply->protect = mapping->protect;
|
|
reply->header_size = mapping->header_size;
|
|
reply->base = mapping->base;
|
|
reply->shared_file = 0;
|
|
if ((fd = get_obj_fd( &mapping->obj )))
|
|
{
|
|
if (!is_fd_removable(fd))
|
|
reply->mapping = alloc_handle( current->process, mapping, 0, 0 );
|
|
release_object( fd );
|
|
}
|
|
if (mapping->shared_file)
|
|
{
|
|
if (!(reply->shared_file = alloc_handle( current->process, mapping->shared_file,
|
|
GENERIC_READ|GENERIC_WRITE, 0 )))
|
|
{
|
|
if (reply->mapping) close_handle( current->process, reply->mapping );
|
|
}
|
|
}
|
|
release_object( mapping );
|
|
}
|
|
}
|
|
|
|
/* get a range of committed pages in a file mapping */
|
|
DECL_HANDLER(get_mapping_committed_range)
|
|
{
|
|
struct mapping *mapping;
|
|
|
|
if ((mapping = get_mapping_obj( current->process, req->handle, 0 )))
|
|
{
|
|
if (!(req->offset & page_mask) && req->offset < mapping->size)
|
|
reply->committed = find_committed_range( mapping, req->offset, &reply->size );
|
|
else
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
|
|
release_object( mapping );
|
|
}
|
|
}
|
|
|
|
/* add a range to the committed pages in a file mapping */
|
|
DECL_HANDLER(add_mapping_committed_range)
|
|
{
|
|
struct mapping *mapping;
|
|
|
|
if ((mapping = get_mapping_obj( current->process, req->handle, 0 )))
|
|
{
|
|
if (!(req->size & page_mask) &&
|
|
!(req->offset & page_mask) &&
|
|
req->offset < mapping->size &&
|
|
req->size > 0 &&
|
|
req->size <= mapping->size - req->offset)
|
|
add_committed_range( mapping, req->offset, req->offset + req->size );
|
|
else
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
|
|
release_object( mapping );
|
|
}
|
|
}
|