2 * Server-side file mapping management
4 * Copyright (C) 1999 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
29 #ifdef HAVE_SYS_MMAN_H
30 # include <sys/mman.h>
35 #define WIN32_NO_STATUS
46 /* list of memory ranges, used to store committed info */
60 struct object obj
; /* object header */
61 mem_size_t size
; /* mapping size */
62 unsigned int flags
; /* SEC_* flags */
63 struct fd
*fd
; /* fd for mapped file */
64 enum cpu_type cpu
; /* client CPU (for PE image mapping) */
65 pe_image_info_t image
; /* image info (for PE image mapping) */
66 struct ranges
*committed
; /* list of committed ranges in this mapping */
67 struct file
*shared_file
; /* temp file for shared PE mapping */
68 struct list shared_entry
; /* entry in global shared PE mappings list */
71 static void mapping_dump( struct object
*obj
, int verbose
);
72 static struct object_type
*mapping_get_type( struct object
*obj
);
73 static struct fd
*mapping_get_fd( struct object
*obj
);
74 static unsigned int mapping_map_access( struct object
*obj
, unsigned int access
);
75 static void mapping_destroy( struct object
*obj
);
76 static enum server_fd_type
mapping_get_fd_type( struct fd
*fd
);
78 static const struct object_ops mapping_ops
=
80 sizeof(struct mapping
), /* size */
81 mapping_dump
, /* dump */
82 mapping_get_type
, /* get_type */
83 no_add_queue
, /* add_queue */
84 NULL
, /* remove_queue */
87 no_signal
, /* signal */
88 mapping_get_fd
, /* get_fd */
89 mapping_map_access
, /* map_access */
90 default_get_sd
, /* get_sd */
91 default_set_sd
, /* set_sd */
92 no_lookup_name
, /* lookup_name */
93 directory_link_name
, /* link_name */
94 default_unlink_name
, /* unlink_name */
95 no_open_file
, /* open_file */
96 fd_close_handle
, /* close_handle */
97 mapping_destroy
/* destroy */
100 static const struct fd_ops mapping_fd_ops
=
102 default_fd_get_poll_events
, /* get_poll_events */
103 default_poll_event
, /* poll_event */
104 mapping_get_fd_type
, /* get_fd_type */
105 no_fd_read
, /* read */
106 no_fd_write
, /* write */
107 no_fd_flush
, /* flush */
108 no_fd_ioctl
, /* ioctl */
109 no_fd_queue_async
, /* queue_async */
110 default_fd_reselect_async
/* reselect_async */
113 static struct list shared_list
= LIST_INIT(shared_list
);
115 static size_t page_mask
;
117 #define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
120 /* extend a file beyond the current end of file */
121 static int grow_file( int unix_fd
, file_pos_t new_size
)
123 static const char zero
;
124 off_t size
= new_size
;
126 if (sizeof(new_size
) > sizeof(size
) && size
!= new_size
)
128 set_error( STATUS_INVALID_PARAMETER
);
131 /* extend the file one byte beyond the requested size and then truncate it */
132 /* this should work around ftruncate implementations that can't extend files */
133 if (pwrite( unix_fd
, &zero
, 1, size
) != -1)
135 ftruncate( unix_fd
, size
);
142 /* check if the current directory allows exec mappings */
143 static int check_current_dir_for_exec(void)
146 char tmpfn
[] = "anonmap.XXXXXX";
147 void *ret
= MAP_FAILED
;
149 fd
= mkstemps( tmpfn
, 0 );
150 if (fd
== -1) return 0;
151 if (grow_file( fd
, 1 ))
153 ret
= mmap( NULL
, get_page_size(), PROT_READ
| PROT_EXEC
, MAP_PRIVATE
, fd
, 0 );
154 if (ret
!= MAP_FAILED
) munmap( ret
, get_page_size() );
158 return (ret
!= MAP_FAILED
);
161 /* create a temp file for anonymous mappings */
162 static int create_temp_file( file_pos_t size
)
164 static int temp_dir_fd
= -1;
165 char tmpfn
[] = "anonmap.XXXXXX";
168 if (temp_dir_fd
== -1)
170 temp_dir_fd
= server_dir_fd
;
171 if (!check_current_dir_for_exec())
173 /* the server dir is noexec, try the config dir instead */
174 fchdir( config_dir_fd
);
175 if (check_current_dir_for_exec())
176 temp_dir_fd
= config_dir_fd
;
177 else /* neither works, fall back to server dir */
178 fchdir( server_dir_fd
);
181 else if (temp_dir_fd
!= server_dir_fd
) fchdir( temp_dir_fd
);
183 fd
= mkstemps( tmpfn
, 0 );
186 if (!grow_file( fd
, size
))
193 else file_set_error();
195 if (temp_dir_fd
!= server_dir_fd
) fchdir( server_dir_fd
);
199 /* find the shared PE mapping for a given mapping */
200 static struct file
*get_shared_file( struct mapping
*mapping
)
204 LIST_FOR_EACH_ENTRY( ptr
, &shared_list
, struct mapping
, shared_entry
)
205 if (is_same_file_fd( ptr
->fd
, mapping
->fd
))
206 return (struct file
*)grab_object( ptr
->shared_file
);
210 /* return the size of the memory mapping and file range of a given section */
211 static inline void get_section_sizes( const IMAGE_SECTION_HEADER
*sec
, size_t *map_size
,
212 off_t
*file_start
, size_t *file_size
)
214 static const unsigned int sector_align
= 0x1ff;
216 if (!sec
->Misc
.VirtualSize
) *map_size
= ROUND_SIZE( sec
->SizeOfRawData
);
217 else *map_size
= ROUND_SIZE( sec
->Misc
.VirtualSize
);
219 *file_start
= sec
->PointerToRawData
& ~sector_align
;
220 *file_size
= (sec
->SizeOfRawData
+ (sec
->PointerToRawData
& sector_align
) + sector_align
) & ~sector_align
;
221 if (*file_size
> *map_size
) *file_size
= *map_size
;
224 /* add a range to the committed list */
225 static void add_committed_range( struct mapping
*mapping
, file_pos_t start
, file_pos_t end
)
228 struct range
*ranges
;
230 if (!mapping
->committed
) return; /* everything committed already */
232 for (i
= 0, ranges
= mapping
->committed
->ranges
; i
< mapping
->committed
->count
; i
++)
234 if (ranges
[i
].start
> end
) break;
235 if (ranges
[i
].end
< start
) continue;
236 if (ranges
[i
].start
> start
) ranges
[i
].start
= start
; /* extend downwards */
237 if (ranges
[i
].end
< end
) /* extend upwards and maybe merge with next */
239 for (j
= i
+ 1; j
< mapping
->committed
->count
; j
++)
241 if (ranges
[j
].start
> end
) break;
242 if (ranges
[j
].end
> end
) end
= ranges
[j
].end
;
246 memmove( &ranges
[i
+ 1], &ranges
[j
], (mapping
->committed
->count
- j
) * sizeof(*ranges
) );
247 mapping
->committed
->count
-= j
- (i
+ 1);
254 /* now add a new range */
256 if (mapping
->committed
->count
== mapping
->committed
->max
)
258 unsigned int new_size
= mapping
->committed
->max
* 2;
259 struct ranges
*new_ptr
= realloc( mapping
->committed
, offsetof( struct ranges
, ranges
[new_size
] ));
260 if (!new_ptr
) return;
261 new_ptr
->max
= new_size
;
262 ranges
= new_ptr
->ranges
;
263 mapping
->committed
= new_ptr
;
265 memmove( &ranges
[i
+ 1], &ranges
[i
], (mapping
->committed
->count
- i
) * sizeof(*ranges
) );
266 ranges
[i
].start
= start
;
268 mapping
->committed
->count
++;
271 /* find the range containing start and return whether it's committed */
272 static int find_committed_range( struct mapping
*mapping
, file_pos_t start
, mem_size_t
*size
)
275 struct range
*ranges
;
277 if (!mapping
->committed
) /* everything is committed */
279 *size
= mapping
->size
- start
;
282 for (i
= 0, ranges
= mapping
->committed
->ranges
; i
< mapping
->committed
->count
; i
++)
284 if (ranges
[i
].start
> start
)
286 *size
= ranges
[i
].start
- start
;
289 if (ranges
[i
].end
> start
)
291 *size
= ranges
[i
].end
- start
;
295 *size
= mapping
->size
- start
;
299 /* allocate and fill the temp file for a shared PE image mapping */
300 static int build_shared_mapping( struct mapping
*mapping
, int fd
,
301 IMAGE_SECTION_HEADER
*sec
, unsigned int nb_sec
)
304 mem_size_t total_size
;
305 size_t file_size
, map_size
, max_size
;
306 off_t shared_pos
, read_pos
, write_pos
;
311 /* compute the total size of the shared mapping */
313 total_size
= max_size
= 0;
314 for (i
= 0; i
< nb_sec
; i
++)
316 if ((sec
[i
].Characteristics
& IMAGE_SCN_MEM_SHARED
) &&
317 (sec
[i
].Characteristics
& IMAGE_SCN_MEM_WRITE
))
319 get_section_sizes( &sec
[i
], &map_size
, &read_pos
, &file_size
);
320 if (file_size
> max_size
) max_size
= file_size
;
321 total_size
+= map_size
;
324 if (!total_size
) return 1; /* nothing to do */
326 if ((mapping
->shared_file
= get_shared_file( mapping
))) return 1;
328 /* create a temp file for the mapping */
330 if ((shared_fd
= create_temp_file( total_size
)) == -1) return 0;
331 if (!(mapping
->shared_file
= create_file_for_fd( shared_fd
, FILE_GENERIC_READ
|FILE_GENERIC_WRITE
, 0 )))
334 if (!(buffer
= malloc( max_size
))) goto error
;
336 /* copy the shared sections data into the temp file */
339 for (i
= 0; i
< nb_sec
; i
++)
341 if (!(sec
[i
].Characteristics
& IMAGE_SCN_MEM_SHARED
)) continue;
342 if (!(sec
[i
].Characteristics
& IMAGE_SCN_MEM_WRITE
)) continue;
343 get_section_sizes( &sec
[i
], &map_size
, &read_pos
, &file_size
);
344 write_pos
= shared_pos
;
345 shared_pos
+= map_size
;
346 if (!sec
[i
].PointerToRawData
|| !file_size
) continue;
350 long res
= pread( fd
, buffer
+ file_size
- toread
, toread
, read_pos
);
351 if (!res
&& toread
< 0x200) /* partial sector at EOF is not an error */
356 if (res
<= 0) goto error
;
360 if (pwrite( shared_fd
, buffer
, file_size
, write_pos
) != file_size
) goto error
;
366 release_object( mapping
->shared_file
);
367 mapping
->shared_file
= NULL
;
372 /* retrieve the mapping parameters for an executable (PE) image */
373 static unsigned int get_image_params( struct mapping
*mapping
, file_pos_t file_size
, int unix_fd
)
375 IMAGE_DOS_HEADER dos
;
376 IMAGE_SECTION_HEADER
*sec
= NULL
;
380 IMAGE_FILE_HEADER FileHeader
;
383 IMAGE_OPTIONAL_HEADER32 hdr32
;
384 IMAGE_OPTIONAL_HEADER64 hdr64
;
390 /* load the headers */
392 if (!file_size
) return STATUS_INVALID_FILE_FOR_SECTION
;
393 if (pread( unix_fd
, &dos
, sizeof(dos
), 0 ) != sizeof(dos
)) return STATUS_INVALID_IMAGE_NOT_MZ
;
394 if (dos
.e_magic
!= IMAGE_DOS_SIGNATURE
) return STATUS_INVALID_IMAGE_NOT_MZ
;
397 size
= pread( unix_fd
, &nt
, sizeof(nt
), pos
);
398 if (size
< sizeof(nt
.Signature
) + sizeof(nt
.FileHeader
)) return STATUS_INVALID_IMAGE_FORMAT
;
399 /* zero out Optional header in the case it's not present or partial */
400 size
= min( size
, sizeof(nt
.Signature
) + sizeof(nt
.FileHeader
) + nt
.FileHeader
.SizeOfOptionalHeader
);
401 if (size
< sizeof(nt
)) memset( (char *)&nt
+ size
, 0, sizeof(nt
) - size
);
402 if (nt
.Signature
!= IMAGE_NT_SIGNATURE
)
404 if (*(WORD
*)&nt
.Signature
== IMAGE_OS2_SIGNATURE
) return STATUS_INVALID_IMAGE_NE_FORMAT
;
405 return STATUS_INVALID_IMAGE_PROTECT
;
408 mapping
->cpu
= current
->process
->cpu
;
409 switch (mapping
->cpu
)
412 if (nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_I386
) return STATUS_INVALID_IMAGE_FORMAT
;
413 if (nt
.opt
.hdr32
.Magic
!= IMAGE_NT_OPTIONAL_HDR32_MAGIC
) return STATUS_INVALID_IMAGE_FORMAT
;
416 if (nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_AMD64
) return STATUS_INVALID_IMAGE_FORMAT
;
417 if (nt
.opt
.hdr64
.Magic
!= IMAGE_NT_OPTIONAL_HDR64_MAGIC
) return STATUS_INVALID_IMAGE_FORMAT
;
420 if (nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_POWERPC
) return STATUS_INVALID_IMAGE_FORMAT
;
421 if (nt
.opt
.hdr32
.Magic
!= IMAGE_NT_OPTIONAL_HDR32_MAGIC
) return STATUS_INVALID_IMAGE_FORMAT
;
424 if (nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_ARM
&&
425 nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_THUMB
&&
426 nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_ARMNT
) return STATUS_INVALID_IMAGE_FORMAT
;
427 if (nt
.opt
.hdr32
.Magic
!= IMAGE_NT_OPTIONAL_HDR32_MAGIC
) return STATUS_INVALID_IMAGE_FORMAT
;
430 if (nt
.FileHeader
.Machine
!= IMAGE_FILE_MACHINE_ARM64
) return STATUS_INVALID_IMAGE_FORMAT
;
431 if (nt
.opt
.hdr64
.Magic
!= IMAGE_NT_OPTIONAL_HDR64_MAGIC
) return STATUS_INVALID_IMAGE_FORMAT
;
434 return STATUS_INVALID_IMAGE_FORMAT
;
437 switch (nt
.opt
.hdr32
.Magic
)
439 case IMAGE_NT_OPTIONAL_HDR32_MAGIC
:
440 mapping
->image
.base
= nt
.opt
.hdr32
.ImageBase
;
441 mapping
->image
.entry_point
= nt
.opt
.hdr32
.ImageBase
+ nt
.opt
.hdr32
.AddressOfEntryPoint
;
442 mapping
->image
.map_size
= ROUND_SIZE( nt
.opt
.hdr32
.SizeOfImage
);
443 mapping
->image
.stack_size
= nt
.opt
.hdr32
.SizeOfStackReserve
;
444 mapping
->image
.stack_commit
= nt
.opt
.hdr32
.SizeOfStackCommit
;
445 mapping
->image
.subsystem
= nt
.opt
.hdr32
.Subsystem
;
446 mapping
->image
.subsystem_low
= nt
.opt
.hdr32
.MinorSubsystemVersion
;
447 mapping
->image
.subsystem_high
= nt
.opt
.hdr32
.MajorSubsystemVersion
;
448 mapping
->image
.dll_charact
= nt
.opt
.hdr32
.DllCharacteristics
;
449 mapping
->image
.loader_flags
= nt
.opt
.hdr32
.LoaderFlags
;
450 mapping
->image
.header_size
= nt
.opt
.hdr32
.SizeOfHeaders
;
451 mapping
->image
.checksum
= nt
.opt
.hdr32
.CheckSum
;
453 case IMAGE_NT_OPTIONAL_HDR64_MAGIC
:
454 mapping
->image
.base
= nt
.opt
.hdr64
.ImageBase
;
455 mapping
->image
.entry_point
= nt
.opt
.hdr64
.ImageBase
+ nt
.opt
.hdr64
.AddressOfEntryPoint
;
456 mapping
->image
.map_size
= ROUND_SIZE( nt
.opt
.hdr64
.SizeOfImage
);
457 mapping
->image
.stack_size
= nt
.opt
.hdr64
.SizeOfStackReserve
;
458 mapping
->image
.stack_commit
= nt
.opt
.hdr64
.SizeOfStackCommit
;
459 mapping
->image
.subsystem
= nt
.opt
.hdr64
.Subsystem
;
460 mapping
->image
.subsystem_low
= nt
.opt
.hdr64
.MinorSubsystemVersion
;
461 mapping
->image
.subsystem_high
= nt
.opt
.hdr64
.MajorSubsystemVersion
;
462 mapping
->image
.dll_charact
= nt
.opt
.hdr64
.DllCharacteristics
;
463 mapping
->image
.loader_flags
= nt
.opt
.hdr64
.LoaderFlags
;
464 mapping
->image
.header_size
= nt
.opt
.hdr64
.SizeOfHeaders
;
465 mapping
->image
.checksum
= nt
.opt
.hdr64
.CheckSum
;
468 mapping
->image
.image_charact
= nt
.FileHeader
.Characteristics
;
469 mapping
->image
.machine
= nt
.FileHeader
.Machine
;
470 mapping
->image
.zerobits
= 0; /* FIXME */
471 mapping
->image
.gp
= 0; /* FIXME */
472 mapping
->image
.contains_code
= 0; /* FIXME */
473 mapping
->image
.image_flags
= 0; /* FIXME */
474 mapping
->image
.file_size
= file_size
;
476 /* load the section headers */
478 pos
+= sizeof(nt
.Signature
) + sizeof(nt
.FileHeader
) + nt
.FileHeader
.SizeOfOptionalHeader
;
479 size
= sizeof(*sec
) * nt
.FileHeader
.NumberOfSections
;
480 if (!mapping
->size
) mapping
->size
= mapping
->image
.map_size
;
481 else if (mapping
->size
> mapping
->image
.map_size
) return STATUS_SECTION_TOO_BIG
;
482 if (pos
+ size
> mapping
->image
.map_size
) return STATUS_INVALID_FILE_FOR_SECTION
;
483 if (pos
+ size
> mapping
->image
.header_size
) mapping
->image
.header_size
= pos
+ size
;
484 if (!(sec
= malloc( size
))) goto error
;
485 if (pread( unix_fd
, sec
, size
, pos
) != size
) goto error
;
487 if (!build_shared_mapping( mapping
, unix_fd
, sec
, nt
.FileHeader
.NumberOfSections
)) goto error
;
489 if (mapping
->shared_file
) list_add_head( &shared_list
, &mapping
->shared_entry
);
496 return STATUS_INVALID_FILE_FOR_SECTION
;
499 static unsigned int get_mapping_flags( obj_handle_t handle
, unsigned int flags
)
501 switch (flags
& (SEC_IMAGE
| SEC_RESERVE
| SEC_COMMIT
| SEC_FILE
))
504 if (flags
& (SEC_WRITECOMBINE
| SEC_LARGE_PAGES
)) break;
505 if (handle
) return SEC_FILE
| SEC_IMAGE
;
506 set_error( STATUS_INVALID_FILE_FOR_SECTION
);
509 if (!handle
) return flags
;
512 if (flags
& SEC_LARGE_PAGES
) break;
513 if (handle
) return SEC_FILE
| (flags
& (SEC_NOCACHE
| SEC_WRITECOMBINE
));
516 set_error( STATUS_INVALID_PARAMETER
);
521 static struct object
*create_mapping( struct object
*root
, const struct unicode_str
*name
,
522 unsigned int attr
, mem_size_t size
, unsigned int flags
,
523 obj_handle_t handle
, unsigned int file_access
,
524 const struct security_descriptor
*sd
)
526 struct mapping
*mapping
;
532 if (!page_mask
) page_mask
= sysconf( _SC_PAGESIZE
) - 1;
534 if (!(mapping
= create_named_object( root
, &mapping_ops
, name
, attr
, sd
)))
536 if (get_error() == STATUS_OBJECT_NAME_EXISTS
)
537 return &mapping
->obj
; /* Nothing else to do */
539 mapping
->size
= size
;
541 mapping
->shared_file
= NULL
;
542 mapping
->committed
= NULL
;
544 if (!(mapping
->flags
= get_mapping_flags( handle
, flags
))) goto error
;
548 const unsigned int sharing
= FILE_SHARE_READ
| FILE_SHARE_WRITE
| FILE_SHARE_DELETE
;
549 unsigned int mapping_access
= FILE_MAPPING_ACCESS
;
551 if (!(file
= get_file_obj( current
->process
, handle
, file_access
))) goto error
;
552 fd
= get_obj_fd( (struct object
*)file
);
554 /* file sharing rules for mappings are different so we use magic the access rights */
555 if (flags
& SEC_IMAGE
) mapping_access
|= FILE_MAPPING_IMAGE
;
556 else if (file_access
& FILE_WRITE_DATA
) mapping_access
|= FILE_MAPPING_WRITE
;
558 if (!(mapping
->fd
= get_fd_object_for_mapping( fd
, mapping_access
, sharing
)))
560 mapping
->fd
= dup_fd_object( fd
, mapping_access
, sharing
, FILE_SYNCHRONOUS_IO_NONALERT
);
561 if (mapping
->fd
) set_fd_user( mapping
->fd
, &mapping_fd_ops
, NULL
);
563 release_object( file
);
564 release_object( fd
);
565 if (!mapping
->fd
) goto error
;
567 if ((unix_fd
= get_unix_fd( mapping
->fd
)) == -1) goto error
;
568 if (fstat( unix_fd
, &st
) == -1)
573 if (flags
& SEC_IMAGE
)
575 unsigned int err
= get_image_params( mapping
, st
.st_size
, unix_fd
);
576 if (!err
) return &mapping
->obj
;
582 if (!(mapping
->size
= st
.st_size
))
584 set_error( STATUS_MAPPED_FILE_SIZE_ZERO
);
588 else if (st
.st_size
< mapping
->size
)
590 if (!(file_access
& FILE_WRITE_DATA
))
592 set_error( STATUS_SECTION_TOO_BIG
);
595 if (!grow_file( unix_fd
, mapping
->size
)) goto error
;
598 else /* Anonymous mapping (no associated file) */
602 set_error( STATUS_INVALID_PARAMETER
);
605 if (flags
& SEC_RESERVE
)
607 if (!(mapping
->committed
= mem_alloc( offsetof(struct ranges
, ranges
[8]) ))) goto error
;
608 mapping
->committed
->count
= 0;
609 mapping
->committed
->max
= 8;
611 mapping
->size
= (mapping
->size
+ page_mask
) & ~((mem_size_t
)page_mask
);
612 if ((unix_fd
= create_temp_file( mapping
->size
)) == -1) goto error
;
613 if (!(mapping
->fd
= create_anonymous_fd( &mapping_fd_ops
, unix_fd
, &mapping
->obj
,
614 FILE_SYNCHRONOUS_IO_NONALERT
))) goto error
;
615 allow_fd_caching( mapping
->fd
);
617 return &mapping
->obj
;
620 release_object( mapping
);
624 struct mapping
*get_mapping_obj( struct process
*process
, obj_handle_t handle
, unsigned int access
)
626 return (struct mapping
*)get_handle_obj( process
, handle
, access
, &mapping_ops
);
629 /* open a new file handle to the file backing the mapping */
630 obj_handle_t
open_mapping_file( struct process
*process
, struct mapping
*mapping
,
631 unsigned int access
, unsigned int sharing
)
634 struct file
*file
= create_file_for_fd_obj( mapping
->fd
, access
, sharing
);
637 handle
= alloc_handle( process
, file
, access
, 0 );
638 release_object( file
);
642 struct mapping
*grab_mapping_unless_removable( struct mapping
*mapping
)
644 if (is_fd_removable( mapping
->fd
)) return NULL
;
645 return (struct mapping
*)grab_object( mapping
);
648 static void mapping_dump( struct object
*obj
, int verbose
)
650 struct mapping
*mapping
= (struct mapping
*)obj
;
651 assert( obj
->ops
== &mapping_ops
);
652 fprintf( stderr
, "Mapping size=%08x%08x flags=%08x fd=%p shared_file=%p\n",
653 (unsigned int)(mapping
->size
>> 32), (unsigned int)mapping
->size
,
654 mapping
->flags
, mapping
->fd
, mapping
->shared_file
);
657 static struct object_type
*mapping_get_type( struct object
*obj
)
659 static const WCHAR name
[] = {'S','e','c','t','i','o','n'};
660 static const struct unicode_str str
= { name
, sizeof(name
) };
661 return get_object_type( &str
);
664 static struct fd
*mapping_get_fd( struct object
*obj
)
666 struct mapping
*mapping
= (struct mapping
*)obj
;
667 return (struct fd
*)grab_object( mapping
->fd
);
670 static unsigned int mapping_map_access( struct object
*obj
, unsigned int access
)
672 if (access
& GENERIC_READ
) access
|= STANDARD_RIGHTS_READ
| SECTION_QUERY
| SECTION_MAP_READ
;
673 if (access
& GENERIC_WRITE
) access
|= STANDARD_RIGHTS_WRITE
| SECTION_MAP_WRITE
;
674 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
| SECTION_MAP_EXECUTE
;
675 if (access
& GENERIC_ALL
) access
|= SECTION_ALL_ACCESS
;
676 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
679 static void mapping_destroy( struct object
*obj
)
681 struct mapping
*mapping
= (struct mapping
*)obj
;
682 assert( obj
->ops
== &mapping_ops
);
683 if (mapping
->fd
) release_object( mapping
->fd
);
684 if (mapping
->shared_file
)
686 release_object( mapping
->shared_file
);
687 list_remove( &mapping
->shared_entry
);
689 free( mapping
->committed
);
692 static enum server_fd_type
mapping_get_fd_type( struct fd
*fd
)
697 int get_page_size(void)
699 if (!page_mask
) page_mask
= sysconf( _SC_PAGESIZE
) - 1;
700 return page_mask
+ 1;
703 /* create a file mapping */
704 DECL_HANDLER(create_mapping
)
706 struct object
*root
, *obj
;
707 struct unicode_str name
;
708 const struct security_descriptor
*sd
;
709 const struct object_attributes
*objattr
= get_req_object_attributes( &sd
, &name
, &root
);
711 if (!objattr
) return;
713 if ((obj
= create_mapping( root
, &name
, objattr
->attributes
, req
->size
, req
->flags
,
714 req
->file_handle
, req
->file_access
, sd
)))
716 if (get_error() == STATUS_OBJECT_NAME_EXISTS
)
717 reply
->handle
= alloc_handle( current
->process
, obj
, req
->access
, objattr
->attributes
);
719 reply
->handle
= alloc_handle_no_access_check( current
->process
, obj
,
720 req
->access
, objattr
->attributes
);
721 release_object( obj
);
724 if (root
) release_object( root
);
727 /* open a handle to a mapping */
728 DECL_HANDLER(open_mapping
)
730 struct unicode_str name
= get_req_unicode_str();
732 reply
->handle
= open_object( current
->process
, req
->rootdir
, req
->access
,
733 &mapping_ops
, &name
, req
->attributes
);
736 /* get a mapping information */
737 DECL_HANDLER(get_mapping_info
)
739 struct mapping
*mapping
;
742 if (!(mapping
= get_mapping_obj( current
->process
, req
->handle
, req
->access
))) return;
744 reply
->size
= mapping
->size
;
745 reply
->flags
= mapping
->flags
;
747 if (mapping
->flags
& SEC_IMAGE
)
748 set_reply_data( &mapping
->image
, min( sizeof(mapping
->image
), get_reply_max_size() ));
750 if (!(req
->access
& (SECTION_MAP_READ
| SECTION_MAP_WRITE
))) /* query only */
752 release_object( mapping
);
756 if ((mapping
->flags
& SEC_IMAGE
) && mapping
->cpu
!= current
->process
->cpu
)
758 set_error( STATUS_INVALID_IMAGE_FORMAT
);
759 release_object( mapping
);
763 if ((fd
= get_obj_fd( &mapping
->obj
)))
765 if (!is_fd_removable(fd
)) reply
->mapping
= alloc_handle( current
->process
, mapping
, 0, 0 );
766 release_object( fd
);
768 if (mapping
->shared_file
)
770 if (!(reply
->shared_file
= alloc_handle( current
->process
, mapping
->shared_file
,
771 GENERIC_READ
|GENERIC_WRITE
, 0 )))
773 if (reply
->mapping
) close_handle( current
->process
, reply
->mapping
);
776 release_object( mapping
);
779 /* get a range of committed pages in a file mapping */
780 DECL_HANDLER(get_mapping_committed_range
)
782 struct mapping
*mapping
;
784 if ((mapping
= get_mapping_obj( current
->process
, req
->handle
, 0 )))
786 if (!(req
->offset
& page_mask
) && req
->offset
< mapping
->size
)
787 reply
->committed
= find_committed_range( mapping
, req
->offset
, &reply
->size
);
789 set_error( STATUS_INVALID_PARAMETER
);
791 release_object( mapping
);
795 /* add a range to the committed pages in a file mapping */
796 DECL_HANDLER(add_mapping_committed_range
)
798 struct mapping
*mapping
;
800 if ((mapping
= get_mapping_obj( current
->process
, req
->handle
, 0 )))
802 if (!(req
->size
& page_mask
) &&
803 !(req
->offset
& page_mask
) &&
804 req
->offset
< mapping
->size
&&
806 req
->size
<= mapping
->size
- req
->offset
)
807 add_committed_range( mapping
, req
->offset
, req
->offset
+ req
->size
);
809 set_error( STATUS_INVALID_PARAMETER
);
811 release_object( mapping
);