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oledb32: Silence interfaces for IDataSourceLocator QI.
[wine.git] / server / mapping.c
blobd12d01d31c3497de3b3d32876b8a53e7738f1a33
1 /*
2 * Server-side file mapping management
3 *
4 * Copyright (C) 1999 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <sys/stat.h>
29 #ifdef HAVE_SYS_MMAN_H
30 # include <sys/mman.h>
31 #endif
32 #include <unistd.h>
33
34 #include "ntstatus.h"
35 #define WIN32_NO_STATUS
36 #include "windef.h"
37 #include "winternl.h"
38
39 #include "file.h"
40 #include "handle.h"
41 #include "thread.h"
42 #include "process.h"
43 #include "request.h"
44 #include "security.h"
45
46 /* list of memory ranges, used to store committed info */
47 struct ranges
48 {
49 struct object obj; /* object header */
50 unsigned int count; /* number of used ranges */
51 unsigned int max; /* number of allocated ranges */
52 struct range
53 {
54 file_pos_t start;
55 file_pos_t end;
56 } *ranges;
57 };
58
59 static void ranges_dump( struct object *obj, int verbose );
60 static void ranges_destroy( struct object *obj );
61
62 static const struct object_ops ranges_ops =
63 {
64 sizeof(struct ranges), /* size */
65 ranges_dump, /* dump */
66 no_get_type, /* get_type */
67 no_add_queue, /* add_queue */
68 NULL, /* remove_queue */
69 NULL, /* signaled */
70 NULL, /* satisfied */
71 no_signal, /* signal */
72 no_get_fd, /* get_fd */
73 no_map_access, /* map_access */
74 default_get_sd, /* get_sd */
75 default_set_sd, /* set_sd */
76 no_lookup_name, /* lookup_name */
77 no_link_name, /* link_name */
78 NULL, /* unlink_name */
79 no_open_file, /* open_file */
80 no_close_handle, /* close_handle */
81 ranges_destroy /* destroy */
82 };
83
84 /* file backing the shared sections of a PE image mapping */
85 struct shared_map
86 {
87 struct object obj; /* object header */
88 struct fd *fd; /* file descriptor of the mapped PE file */
89 struct file *file; /* temp file holding the shared data */
90 struct list entry; /* entry in global shared maps list */
91 };
92
93 static void shared_map_dump( struct object *obj, int verbose );
94 static void shared_map_destroy( struct object *obj );
95
96 static const struct object_ops shared_map_ops =
97 {
98 sizeof(struct shared_map), /* size */
99 shared_map_dump, /* dump */
100 no_get_type, /* get_type */
101 no_add_queue, /* add_queue */
102 NULL, /* remove_queue */
103 NULL, /* signaled */
104 NULL, /* satisfied */
105 no_signal, /* signal */
106 no_get_fd, /* get_fd */
107 no_map_access, /* map_access */
108 default_get_sd, /* get_sd */
109 default_set_sd, /* set_sd */
110 no_lookup_name, /* lookup_name */
111 no_link_name, /* link_name */
112 NULL, /* unlink_name */
113 no_open_file, /* open_file */
114 no_close_handle, /* close_handle */
115 shared_map_destroy /* destroy */
116 };
117
118 static struct list shared_map_list = LIST_INIT( shared_map_list );
119
120 /* memory view mapped in client address space */
121 struct memory_view
122 {
123 struct list entry; /* entry in per-process view list */
124 struct fd *fd; /* fd for mapped file */
125 struct ranges *committed; /* list of committed ranges in this mapping */
126 struct shared_map *shared; /* temp file for shared PE mapping */
127 unsigned int flags; /* SEC_* flags */
128 client_ptr_t base; /* view base address (in process addr space) */
129 mem_size_t size; /* view size */
130 file_pos_t start; /* start offset in mapping */
131 };
132
133 struct mapping
134 {
135 struct object obj; /* object header */
136 mem_size_t size; /* mapping size */
137 unsigned int flags; /* SEC_* flags */
138 struct fd *fd; /* fd for mapped file */
139 enum cpu_type cpu; /* client CPU (for PE image mapping) */
140 pe_image_info_t image; /* image info (for PE image mapping) */
141 struct ranges *committed; /* list of committed ranges in this mapping */
142 struct shared_map *shared; /* temp file for shared PE mapping */
143 };
144
145 static void mapping_dump( struct object *obj, int verbose );
146 static struct object_type *mapping_get_type( struct object *obj );
147 static struct fd *mapping_get_fd( struct object *obj );
148 static unsigned int mapping_map_access( struct object *obj, unsigned int access );
149 static void mapping_destroy( struct object *obj );
150 static enum server_fd_type mapping_get_fd_type( struct fd *fd );
151
152 static const struct object_ops mapping_ops =
153 {
154 sizeof(struct mapping), /* size */
155 mapping_dump, /* dump */
156 mapping_get_type, /* get_type */
157 no_add_queue, /* add_queue */
158 NULL, /* remove_queue */
159 NULL, /* signaled */
160 NULL, /* satisfied */
161 no_signal, /* signal */
162 mapping_get_fd, /* get_fd */
163 mapping_map_access, /* map_access */
164 default_get_sd, /* get_sd */
165 default_set_sd, /* set_sd */
166 no_lookup_name, /* lookup_name */
167 directory_link_name, /* link_name */
168 default_unlink_name, /* unlink_name */
169 no_open_file, /* open_file */
170 fd_close_handle, /* close_handle */
171 mapping_destroy /* destroy */
172 };
173
174 static const struct fd_ops mapping_fd_ops =
175 {
176 default_fd_get_poll_events, /* get_poll_events */
177 default_poll_event, /* poll_event */
178 mapping_get_fd_type, /* get_fd_type */
179 no_fd_read, /* read */
180 no_fd_write, /* write */
181 no_fd_flush, /* flush */
182 no_fd_get_file_info, /* get_file_info */
183 no_fd_get_volume_info, /* get_volume_info */
184 no_fd_ioctl, /* ioctl */
185 no_fd_queue_async, /* queue_async */
186 default_fd_reselect_async /* reselect_async */
187 };
188
189 static size_t page_mask;
190
191 #define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
192
193
194 static void ranges_dump( struct object *obj, int verbose )
195 {
196 struct ranges *ranges = (struct ranges *)obj;
197 fprintf( stderr, "Memory ranges count=%u\n", ranges->count );
198 }
199
200 static void ranges_destroy( struct object *obj )
201 {
202 struct ranges *ranges = (struct ranges *)obj;
203 free( ranges->ranges );
204 }
205
206 static void shared_map_dump( struct object *obj, int verbose )
207 {
208 struct shared_map *shared = (struct shared_map *)obj;
209 fprintf( stderr, "Shared mapping fd=%p file=%p\n", shared->fd, shared->file );
210 }
211
212 static void shared_map_destroy( struct object *obj )
213 {
214 struct shared_map *shared = (struct shared_map *)obj;
215
216 release_object( shared->fd );
217 release_object( shared->file );
218 list_remove( &shared->entry );
219 }
220
221 /* extend a file beyond the current end of file */
222 static int grow_file( int unix_fd, file_pos_t new_size )
223 {
224 static const char zero;
225 off_t size = new_size;
226
227 if (sizeof(new_size) > sizeof(size) && size != new_size)
228 {
229 set_error( STATUS_INVALID_PARAMETER );
230 return 0;
231 }
232 /* extend the file one byte beyond the requested size and then truncate it */
233 /* this should work around ftruncate implementations that can't extend files */
234 if (pwrite( unix_fd, &zero, 1, size ) != -1)
235 {
236 ftruncate( unix_fd, size );
237 return 1;
238 }
239 file_set_error();
240 return 0;
241 }
242
243 /* check if the current directory allows exec mappings */
244 static int check_current_dir_for_exec(void)
245 {
246 int fd;
247 char tmpfn[] = "anonmap.XXXXXX";
248 void *ret = MAP_FAILED;
249
250 fd = mkstemps( tmpfn, 0 );
251 if (fd == -1) return 0;
252 if (grow_file( fd, 1 ))
253 {
254 ret = mmap( NULL, get_page_size(), PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0 );
255 if (ret != MAP_FAILED) munmap( ret, get_page_size() );
256 }
257 close( fd );
258 unlink( tmpfn );
259 return (ret != MAP_FAILED);
260 }
261
262 /* create a temp file for anonymous mappings */
263 static int create_temp_file( file_pos_t size )
264 {
265 static int temp_dir_fd = -1;
266 char tmpfn[] = "anonmap.XXXXXX";
267 int fd;
268
269 if (temp_dir_fd == -1)
270 {
271 temp_dir_fd = server_dir_fd;
272 if (!check_current_dir_for_exec())
273 {
274 /* the server dir is noexec, try the config dir instead */
275 fchdir( config_dir_fd );
276 if (check_current_dir_for_exec())
277 temp_dir_fd = config_dir_fd;
278 else /* neither works, fall back to server dir */
279 fchdir( server_dir_fd );
280 }
281 }
282 else if (temp_dir_fd != server_dir_fd) fchdir( temp_dir_fd );
283
284 fd = mkstemps( tmpfn, 0 );
285 if (fd != -1)
286 {
287 if (!grow_file( fd, size ))
288 {
289 close( fd );
290 fd = -1;
291 }
292 unlink( tmpfn );
293 }
294 else file_set_error();
295
296 if (temp_dir_fd != server_dir_fd) fchdir( server_dir_fd );
297 return fd;
298 }
299
300 /* find a memory view from its base address */
301 static struct memory_view *find_mapped_view( struct process *process, client_ptr_t base )
302 {
303 struct memory_view *view;
304
305 LIST_FOR_EACH_ENTRY( view, &process->views, struct memory_view, entry )
306 if (view->base == base) return view;
307
308 set_error( STATUS_NOT_MAPPED_VIEW );
309 return NULL;
310 }
311
312 static void free_memory_view( struct memory_view *view )
313 {
314 if (view->fd) release_object( view->fd );
315 if (view->committed) release_object( view->committed );
316 if (view->shared) release_object( view->shared );
317 list_remove( &view->entry );
318 free( view );
319 }
320
321 /* free all mapped views at process exit */
322 void free_mapped_views( struct process *process )
323 {
324 struct list *ptr;
325
326 while ((ptr = list_head( &process->views )))
327 free_memory_view( LIST_ENTRY( ptr, struct memory_view, entry ));
328 }
329
330 /* find the shared PE mapping for a given mapping */
331 static struct shared_map *get_shared_file( struct fd *fd )
332 {
333 struct shared_map *ptr;
334
335 LIST_FOR_EACH_ENTRY( ptr, &shared_map_list, struct shared_map, entry )
336 if (is_same_file_fd( ptr->fd, fd ))
337 return (struct shared_map *)grab_object( ptr );
338 return NULL;
339 }
340
341 /* return the size of the memory mapping and file range of a given section */
342 static inline void get_section_sizes( const IMAGE_SECTION_HEADER *sec, size_t *map_size,
343 off_t *file_start, size_t *file_size )
344 {
345 static const unsigned int sector_align = 0x1ff;
346
347 if (!sec->Misc.VirtualSize) *map_size = ROUND_SIZE( sec->SizeOfRawData );
348 else *map_size = ROUND_SIZE( sec->Misc.VirtualSize );
349
350 *file_start = sec->PointerToRawData & ~sector_align;
351 *file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
352 if (*file_size > *map_size) *file_size = *map_size;
353 }
354
355 /* add a range to the committed list */
356 static void add_committed_range( struct memory_view *view, file_pos_t start, file_pos_t end )
357 {
358 unsigned int i, j;
359 struct ranges *committed = view->committed;
360 struct range *ranges;
361
362 if ((start & page_mask) || (end & page_mask) ||
363 start >= view->size || end >= view->size ||
364 start >= end)
365 {
366 set_error( STATUS_INVALID_PARAMETER );
367 return;
368 }
369
370 if (!committed) return; /* everything committed already */
371
372 start += view->start;
373 end += view->start;
374
375 for (i = 0, ranges = committed->ranges; i < committed->count; i++)
376 {
377 if (ranges[i].start > end) break;
378 if (ranges[i].end < start) continue;
379 if (ranges[i].start > start) ranges[i].start = start; /* extend downwards */
380 if (ranges[i].end < end) /* extend upwards and maybe merge with next */
381 {
382 for (j = i + 1; j < committed->count; j++)
383 {
384 if (ranges[j].start > end) break;
385 if (ranges[j].end > end) end = ranges[j].end;
386 }
387 if (j > i + 1)
388 {
389 memmove( &ranges[i + 1], &ranges[j], (committed->count - j) * sizeof(*ranges) );
390 committed->count -= j - (i + 1);
391 }
392 ranges[i].end = end;
393 }
394 return;
395 }
396
397 /* now add a new range */
398
399 if (committed->count == committed->max)
400 {
401 unsigned int new_size = committed->max * 2;
402 struct range *new_ptr = realloc( committed->ranges, new_size * sizeof(*new_ptr) );
403 if (!new_ptr) return;
404 committed->max = new_size;
405 committed->ranges = new_ptr;
406 }
407 memmove( &ranges[i + 1], &ranges[i], (committed->count - i) * sizeof(*ranges) );
408 ranges[i].start = start;
409 ranges[i].end = end;
410 committed->count++;
411 }
412
413 /* find the range containing start and return whether it's committed */
414 static int find_committed_range( struct memory_view *view, file_pos_t start, mem_size_t *size )
415 {
416 unsigned int i;
417 struct ranges *committed = view->committed;
418 struct range *ranges;
419
420 if ((start & page_mask) || start >= view->size)
421 {
422 set_error( STATUS_INVALID_PARAMETER );
423 return 0;
424 }
425 if (!committed) /* everything is committed */
426 {
427 *size = view->size - start;
428 return 1;
429 }
430 for (i = 0, ranges = committed->ranges; i < committed->count; i++)
431 {
432 if (ranges[i].start > view->start + start)
433 {
434 *size = min( ranges[i].start, view->start + view->size ) - (view->start + start);
435 return 0;
436 }
437 if (ranges[i].end > view->start + start)
438 {
439 *size = min( ranges[i].end, view->start + view->size ) - (view->start + start);
440 return 1;
441 }
442 }
443 *size = view->size - start;
444 return 0;
445 }
446
447 /* allocate and fill the temp file for a shared PE image mapping */
448 static int build_shared_mapping( struct mapping *mapping, int fd,
449 IMAGE_SECTION_HEADER *sec, unsigned int nb_sec )
450 {
451 struct shared_map *shared;
452 struct file *file;
453 unsigned int i;
454 mem_size_t total_size;
455 size_t file_size, map_size, max_size;
456 off_t shared_pos, read_pos, write_pos;
457 char *buffer = NULL;
458 int shared_fd;
459 long toread;
460
461 /* compute the total size of the shared mapping */
462
463 total_size = max_size = 0;
464 for (i = 0; i < nb_sec; i++)
465 {
466 if ((sec[i].Characteristics & IMAGE_SCN_MEM_SHARED) &&
467 (sec[i].Characteristics & IMAGE_SCN_MEM_WRITE))
468 {
469 get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
470 if (file_size > max_size) max_size = file_size;
471 total_size += map_size;
472 }
473 }
474 if (!total_size) return 1; /* nothing to do */
475
476 if ((mapping->shared = get_shared_file( mapping->fd ))) return 1;
477
478 /* create a temp file for the mapping */
479
480 if ((shared_fd = create_temp_file( total_size )) == -1) return 0;
481 if (!(file = create_file_for_fd( shared_fd, FILE_GENERIC_READ|FILE_GENERIC_WRITE, 0 ))) return 0;
482
483 if (!(buffer = malloc( max_size ))) goto error;
484
485 /* copy the shared sections data into the temp file */
486
487 shared_pos = 0;
488 for (i = 0; i < nb_sec; i++)
489 {
490 if (!(sec[i].Characteristics & IMAGE_SCN_MEM_SHARED)) continue;
491 if (!(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) continue;
492 get_section_sizes( &sec[i], &map_size, &read_pos, &file_size );
493 write_pos = shared_pos;
494 shared_pos += map_size;
495 if (!sec[i].PointerToRawData || !file_size) continue;
496 toread = file_size;
497 while (toread)
498 {
499 long res = pread( fd, buffer + file_size - toread, toread, read_pos );
500 if (!res && toread < 0x200) /* partial sector at EOF is not an error */
501 {
502 file_size -= toread;
503 break;
504 }
505 if (res <= 0) goto error;
506 toread -= res;
507 read_pos += res;
508 }
509 if (pwrite( shared_fd, buffer, file_size, write_pos ) != file_size) goto error;
510 }
511
512 if (!(shared = alloc_object( &shared_map_ops ))) goto error;
513 shared->fd = (struct fd *)grab_object( mapping->fd );
514 shared->file = file;
515 list_add_head( &shared_map_list, &shared->entry );
516 mapping->shared = shared;
517 free( buffer );
518 return 1;
519
520 error:
521 release_object( file );
522 free( buffer );
523 return 0;
524 }
525
526 /* retrieve the mapping parameters for an executable (PE) image */
527 static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_size, int unix_fd )
528 {
529 IMAGE_DOS_HEADER dos;
530 IMAGE_SECTION_HEADER *sec = NULL;
531 struct
532 {
533 DWORD Signature;
534 IMAGE_FILE_HEADER FileHeader;
535 union
536 {
537 IMAGE_OPTIONAL_HEADER32 hdr32;
538 IMAGE_OPTIONAL_HEADER64 hdr64;
539 } opt;
540 } nt;
541 off_t pos;
542 int size;
543
544 /* load the headers */
545
546 if (!file_size) return STATUS_INVALID_FILE_FOR_SECTION;
547 if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) return STATUS_INVALID_IMAGE_NOT_MZ;
548 if (dos.e_magic != IMAGE_DOS_SIGNATURE) return STATUS_INVALID_IMAGE_NOT_MZ;
549 pos = dos.e_lfanew;
550
551 size = pread( unix_fd, &nt, sizeof(nt), pos );
552 if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) return STATUS_INVALID_IMAGE_FORMAT;
553 /* zero out Optional header in the case it's not present or partial */
554 size = min( size, sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader );
555 if (size < sizeof(nt)) memset( (char *)&nt + size, 0, sizeof(nt) - size );
556 if (nt.Signature != IMAGE_NT_SIGNATURE)
557 {
558 if (*(WORD *)&nt.Signature == IMAGE_OS2_SIGNATURE) return STATUS_INVALID_IMAGE_NE_FORMAT;
559 return STATUS_INVALID_IMAGE_PROTECT;
560 }
561
562 mapping->cpu = current->process->cpu;
563 switch (mapping->cpu)
564 {
565 case CPU_x86:
566 if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_I386) return STATUS_INVALID_IMAGE_FORMAT;
567 if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
568 break;
569 case CPU_x86_64:
570 if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_AMD64) return STATUS_INVALID_IMAGE_FORMAT;
571 if (nt.opt.hdr64.Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
572 break;
573 case CPU_POWERPC:
574 if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_POWERPC) return STATUS_INVALID_IMAGE_FORMAT;
575 if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
576 break;
577 case CPU_ARM:
578 if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARM &&
579 nt.FileHeader.Machine != IMAGE_FILE_MACHINE_THUMB &&
580 nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARMNT) return STATUS_INVALID_IMAGE_FORMAT;
581 if (nt.opt.hdr32.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
582 break;
583 case CPU_ARM64:
584 if (nt.FileHeader.Machine != IMAGE_FILE_MACHINE_ARM64) return STATUS_INVALID_IMAGE_FORMAT;
585 if (nt.opt.hdr64.Magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) return STATUS_INVALID_IMAGE_FORMAT;
586 break;
587 default:
588 return STATUS_INVALID_IMAGE_FORMAT;
589 }
590
591 switch (nt.opt.hdr32.Magic)
592 {
593 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
594 mapping->image.base = nt.opt.hdr32.ImageBase;
595 mapping->image.entry_point = nt.opt.hdr32.ImageBase + nt.opt.hdr32.AddressOfEntryPoint;
596 mapping->image.map_size = ROUND_SIZE( nt.opt.hdr32.SizeOfImage );
597 mapping->image.stack_size = nt.opt.hdr32.SizeOfStackReserve;
598 mapping->image.stack_commit = nt.opt.hdr32.SizeOfStackCommit;
599 mapping->image.subsystem = nt.opt.hdr32.Subsystem;
600 mapping->image.subsystem_low = nt.opt.hdr32.MinorSubsystemVersion;
601 mapping->image.subsystem_high = nt.opt.hdr32.MajorSubsystemVersion;
602 mapping->image.dll_charact = nt.opt.hdr32.DllCharacteristics;
603 mapping->image.loader_flags = nt.opt.hdr32.LoaderFlags;
604 mapping->image.header_size = nt.opt.hdr32.SizeOfHeaders;
605 mapping->image.checksum = nt.opt.hdr32.CheckSum;
606 break;
607 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
608 mapping->image.base = nt.opt.hdr64.ImageBase;
609 mapping->image.entry_point = nt.opt.hdr64.ImageBase + nt.opt.hdr64.AddressOfEntryPoint;
610 mapping->image.map_size = ROUND_SIZE( nt.opt.hdr64.SizeOfImage );
611 mapping->image.stack_size = nt.opt.hdr64.SizeOfStackReserve;
612 mapping->image.stack_commit = nt.opt.hdr64.SizeOfStackCommit;
613 mapping->image.subsystem = nt.opt.hdr64.Subsystem;
614 mapping->image.subsystem_low = nt.opt.hdr64.MinorSubsystemVersion;
615 mapping->image.subsystem_high = nt.opt.hdr64.MajorSubsystemVersion;
616 mapping->image.dll_charact = nt.opt.hdr64.DllCharacteristics;
617 mapping->image.loader_flags = nt.opt.hdr64.LoaderFlags;
618 mapping->image.header_size = nt.opt.hdr64.SizeOfHeaders;
619 mapping->image.checksum = nt.opt.hdr64.CheckSum;
620 break;
621 }
622 mapping->image.image_charact = nt.FileHeader.Characteristics;
623 mapping->image.machine = nt.FileHeader.Machine;
624 mapping->image.zerobits = 0; /* FIXME */
625 mapping->image.gp = 0; /* FIXME */
626 mapping->image.contains_code = 0; /* FIXME */
627 mapping->image.image_flags = 0; /* FIXME */
628 mapping->image.file_size = file_size;
629
630 /* load the section headers */
631
632 pos += sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader;
633 size = sizeof(*sec) * nt.FileHeader.NumberOfSections;
634 if (!mapping->size) mapping->size = mapping->image.map_size;
635 else if (mapping->size > mapping->image.map_size) return STATUS_SECTION_TOO_BIG;
636 if (pos + size > mapping->image.map_size) return STATUS_INVALID_FILE_FOR_SECTION;
637 if (pos + size > mapping->image.header_size) mapping->image.header_size = pos + size;
638 if (!(sec = malloc( size ))) goto error;
639 if (pread( unix_fd, sec, size, pos ) != size) goto error;
640
641 if (!build_shared_mapping( mapping, unix_fd, sec, nt.FileHeader.NumberOfSections )) goto error;
642
643 free( sec );
644 return 0;
645
646 error:
647 free( sec );
648 return STATUS_INVALID_FILE_FOR_SECTION;
649 }
650
651 static struct ranges *create_ranges(void)
652 {
653 struct ranges *ranges = alloc_object( &ranges_ops );
654
655 if (!ranges) return NULL;
656 ranges->count = 0;
657 ranges->max = 8;
658 if (!(ranges->ranges = mem_alloc( ranges->max * sizeof(*ranges->ranges) )))
659 {
660 release_object( ranges );
661 return NULL;
662 }
663 return ranges;
664 }
665
666 static unsigned int get_mapping_flags( obj_handle_t handle, unsigned int flags )
667 {
668 switch (flags & (SEC_IMAGE | SEC_RESERVE | SEC_COMMIT | SEC_FILE))
669 {
670 case SEC_IMAGE:
671 if (flags & (SEC_WRITECOMBINE | SEC_LARGE_PAGES)) break;
672 if (handle) return SEC_FILE | SEC_IMAGE;
673 set_error( STATUS_INVALID_FILE_FOR_SECTION );
674 return 0;
675 case SEC_COMMIT:
676 if (!handle) return flags;
677 /* fall through */
678 case SEC_RESERVE:
679 if (flags & SEC_LARGE_PAGES) break;
680 if (handle) return SEC_FILE | (flags & (SEC_NOCACHE | SEC_WRITECOMBINE));
681 return flags;
682 }
683 set_error( STATUS_INVALID_PARAMETER );
684 return 0;
685 }
686
687
688 static struct object *create_mapping( struct object *root, const struct unicode_str *name,
689 unsigned int attr, mem_size_t size, unsigned int flags,
690 obj_handle_t handle, unsigned int file_access,
691 const struct security_descriptor *sd )
692 {
693 struct mapping *mapping;
694 struct file *file;
695 struct fd *fd;
696 int unix_fd;
697 struct stat st;
698
699 if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
700
701 if (!(mapping = create_named_object( root, &mapping_ops, name, attr, sd )))
702 return NULL;
703 if (get_error() == STATUS_OBJECT_NAME_EXISTS)
704 return &mapping->obj; /* Nothing else to do */
705
706 mapping->size = size;
707 mapping->fd = NULL;
708 mapping->shared = NULL;
709 mapping->committed = NULL;
710
711 if (!(mapping->flags = get_mapping_flags( handle, flags ))) goto error;
712
713 if (handle)
714 {
715 const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
716 unsigned int mapping_access = FILE_MAPPING_ACCESS;
717
718 if (!(file = get_file_obj( current->process, handle, file_access ))) goto error;
719 fd = get_obj_fd( (struct object *)file );
720
721 /* file sharing rules for mappings are different so we use magic the access rights */
722 if (flags & SEC_IMAGE) mapping_access |= FILE_MAPPING_IMAGE;
723 else if (file_access & FILE_WRITE_DATA) mapping_access |= FILE_MAPPING_WRITE;
724
725 if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing )))
726 {
727 mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT );
728 if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL );
729 }
730 release_object( file );
731 release_object( fd );
732 if (!mapping->fd) goto error;
733
734 if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error;
735 if (fstat( unix_fd, &st ) == -1)
736 {
737 file_set_error();
738 goto error;
739 }
740 if (flags & SEC_IMAGE)
741 {
742 unsigned int err = get_image_params( mapping, st.st_size, unix_fd );
743 if (!err) return &mapping->obj;
744 set_error( err );
745 goto error;
746 }
747 if (!mapping->size)
748 {
749 if (!(mapping->size = st.st_size))
750 {
751 set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
752 goto error;
753 }
754 }
755 else if (st.st_size < mapping->size)
756 {
757 if (!(file_access & FILE_WRITE_DATA))
758 {
759 set_error( STATUS_SECTION_TOO_BIG );
760 goto error;
761 }
762 if (!grow_file( unix_fd, mapping->size )) goto error;
763 }
764 }
765 else /* Anonymous mapping (no associated file) */
766 {
767 if (!mapping->size)
768 {
769 set_error( STATUS_INVALID_PARAMETER );
770 goto error;
771 }
772 if ((flags & SEC_RESERVE) && !(mapping->committed = create_ranges())) goto error;
773 mapping->size = (mapping->size + page_mask) & ~((mem_size_t)page_mask);
774 if ((unix_fd = create_temp_file( mapping->size )) == -1) goto error;
775 if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj,
776 FILE_SYNCHRONOUS_IO_NONALERT ))) goto error;
777 allow_fd_caching( mapping->fd );
778 }
779 return &mapping->obj;
780
781 error:
782 release_object( mapping );
783 return NULL;
784 }
785
786 struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle, unsigned int access )
787 {
788 return (struct mapping *)get_handle_obj( process, handle, access, &mapping_ops );
789 }
790
791 /* open a new file for the file descriptor backing the mapping */
792 struct file *get_mapping_file( struct process *process, client_ptr_t base,
793 unsigned int access, unsigned int sharing )
794 {
795 struct memory_view *view = find_mapped_view( process, base );
796
797 if (!view || !view->fd) return NULL;
798 return create_file_for_fd_obj( view->fd, access, sharing );
799 }
800
801 static void mapping_dump( struct object *obj, int verbose )
802 {
803 struct mapping *mapping = (struct mapping *)obj;
804 assert( obj->ops == &mapping_ops );
805 fprintf( stderr, "Mapping size=%08x%08x flags=%08x fd=%p shared=%p\n",
806 (unsigned int)(mapping->size >> 32), (unsigned int)mapping->size,
807 mapping->flags, mapping->fd, mapping->shared );
808 }
809
810 static struct object_type *mapping_get_type( struct object *obj )
811 {
812 static const WCHAR name[] = {'S','e','c','t','i','o','n'};
813 static const struct unicode_str str = { name, sizeof(name) };
814 return get_object_type( &str );
815 }
816
817 static struct fd *mapping_get_fd( struct object *obj )
818 {
819 struct mapping *mapping = (struct mapping *)obj;
820 return (struct fd *)grab_object( mapping->fd );
821 }
822
823 static unsigned int mapping_map_access( struct object *obj, unsigned int access )
824 {
825 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SECTION_QUERY | SECTION_MAP_READ;
826 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE;
827 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE;
828 if (access & GENERIC_ALL) access |= SECTION_ALL_ACCESS;
829 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
830 }
831
832 static void mapping_destroy( struct object *obj )
833 {
834 struct mapping *mapping = (struct mapping *)obj;
835 assert( obj->ops == &mapping_ops );
836 if (mapping->fd) release_object( mapping->fd );
837 if (mapping->committed) release_object( mapping->committed );
838 if (mapping->shared) release_object( mapping->shared );
839 }
840
841 static enum server_fd_type mapping_get_fd_type( struct fd *fd )
842 {
843 return FD_TYPE_FILE;
844 }
845
846 int get_page_size(void)
847 {
848 if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
849 return page_mask + 1;
850 }
851
852 /* create a file mapping */
853 DECL_HANDLER(create_mapping)
854 {
855 struct object *root, *obj;
856 struct unicode_str name;
857 const struct security_descriptor *sd;
858 const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
859
860 if (!objattr) return;
861
862 if ((obj = create_mapping( root, &name, objattr->attributes, req->size, req->flags,
863 req->file_handle, req->file_access, sd )))
864 {
865 if (get_error() == STATUS_OBJECT_NAME_EXISTS)
866 reply->handle = alloc_handle( current->process, obj, req->access, objattr->attributes );
867 else
868 reply->handle = alloc_handle_no_access_check( current->process, obj,
869 req->access, objattr->attributes );
870 release_object( obj );
871 }
872
873 if (root) release_object( root );
874 }
875
876 /* open a handle to a mapping */
877 DECL_HANDLER(open_mapping)
878 {
879 struct unicode_str name = get_req_unicode_str();
880
881 reply->handle = open_object( current->process, req->rootdir, req->access,
882 &mapping_ops, &name, req->attributes );
883 }
884
885 /* get a mapping information */
886 DECL_HANDLER(get_mapping_info)
887 {
888 struct mapping *mapping;
889
890 if (!(mapping = get_mapping_obj( current->process, req->handle, req->access ))) return;
891
892 reply->size = mapping->size;
893 reply->flags = mapping->flags;
894
895 if (mapping->flags & SEC_IMAGE)
896 set_reply_data( &mapping->image, min( sizeof(mapping->image), get_reply_max_size() ));
897
898 if (!(req->access & (SECTION_MAP_READ | SECTION_MAP_WRITE))) /* query only */
899 {
900 release_object( mapping );
901 return;
902 }
903
904 if ((mapping->flags & SEC_IMAGE) && mapping->cpu != current->process->cpu)
905 {
906 set_error( STATUS_INVALID_IMAGE_FORMAT );
907 release_object( mapping );
908 return;
909 }
910
911 if (mapping->shared)
912 reply->shared_file = alloc_handle( current->process, mapping->shared->file,
913 GENERIC_READ|GENERIC_WRITE, 0 );
914 release_object( mapping );
915 }
916
917 /* add a memory view in the current process */
918 DECL_HANDLER(map_view)
919 {
920 struct mapping *mapping = NULL;
921 struct memory_view *view;
922
923 if (!req->size || (req->base & page_mask) || req->base + req->size < req->base) /* overflow */
924 {
925 set_error( STATUS_INVALID_PARAMETER );
926 return;
927 }
928
929 /* make sure we don't already have an overlapping view */
930 LIST_FOR_EACH_ENTRY( view, &current->process->views, struct memory_view, entry )
931 {
932 if (view->base + view->size <= req->base) continue;
933 if (view->base >= req->base + req->size) continue;
934 set_error( STATUS_INVALID_PARAMETER );
935 return;
936 }
937
938 if (!(mapping = get_mapping_obj( current->process, req->mapping, req->access ))) return;
939
940 if (mapping->flags & SEC_IMAGE)
941 {
942 if (req->start || req->size > mapping->image.map_size)
943 {
944 set_error( STATUS_INVALID_PARAMETER );
945 goto done;
946 }
947 }
948 else if (req->start >= mapping->size ||
949 req->start + req->size < req->start ||
950 req->start + req->size > ((mapping->size + page_mask) & ~(mem_size_t)page_mask))
951 {
952 set_error( STATUS_INVALID_PARAMETER );
953 goto done;
954 }
955
956 if ((view = mem_alloc( sizeof(*view) )))
957 {
958 view->base = req->base;
959 view->size = req->size;
960 view->start = req->start;
961 view->flags = mapping->flags;
962 view->fd = !is_fd_removable( mapping->fd ) ? (struct fd *)grab_object( mapping->fd ) : NULL;
963 view->committed = mapping->committed ? (struct ranges *)grab_object( mapping->committed ) : NULL;
964 view->shared = mapping->shared ? (struct shared_map *)grab_object( mapping->shared ) : NULL;
965 list_add_tail( &current->process->views, &view->entry );
966 }
967
968 done:
969 release_object( mapping );
970 }
971
972 /* unmap a memory view from the current process */
973 DECL_HANDLER(unmap_view)
974 {
975 struct memory_view *view = find_mapped_view( current->process, req->base );
976
977 if (view) free_memory_view( view );
978 }
979
980 /* get a range of committed pages in a file mapping */
981 DECL_HANDLER(get_mapping_committed_range)
982 {
983 struct memory_view *view = find_mapped_view( current->process, req->base );
984
985 if (view) reply->committed = find_committed_range( view, req->offset, &reply->size );
986 }
987
988 /* add a range to the committed pages in a file mapping */
989 DECL_HANDLER(add_mapping_committed_range)
990 {
991 struct memory_view *view = find_mapped_view( current->process, req->base );
992
993 if (view) add_committed_range( view, req->offset, req->offset + req->size );
994 }
995
996 /* check if two memory maps are for the same file */
997 DECL_HANDLER(is_same_mapping)
998 {
999 struct memory_view *view1 = find_mapped_view( current->process, req->base1 );
1000 struct memory_view *view2 = find_mapped_view( current->process, req->base2 );
1001
1002 if (!view1 || !view2) return;
1003 if (!view1->fd || !view2->fd ||
1004 !(view1->flags & SEC_IMAGE) || !(view2->flags & SEC_IMAGE) ||
1005 !is_same_file_fd( view1->fd, view2->fd ))
1006 set_error( STATUS_NOT_SAME_DEVICE );
1007 }
Windows API implementation