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ndis(4): Avoid overflow.
[freebsd-src.git] / sys / compat / ndis / subr_ntoskrnl.c
blob35f38a46387629e355054dd2f5357734dc30d675
1 /*-
2 * Copyright (c) 2003
3 * Bill Paul <wpaul@windriver.com>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include <sys/ctype.h>
37 #include <sys/unistd.h>
38 #include <sys/param.h>
39 #include <sys/types.h>
40 #include <sys/errno.h>
41 #include <sys/systm.h>
42 #include <sys/malloc.h>
43 #include <sys/lock.h>
44 #include <sys/mutex.h>
45
46 #include <sys/callout.h>
47 #include <sys/kdb.h>
48 #include <sys/kernel.h>
49 #include <sys/proc.h>
50 #include <sys/condvar.h>
51 #include <sys/kthread.h>
52 #include <sys/module.h>
53 #include <sys/smp.h>
54 #include <sys/sched.h>
55 #include <sys/sysctl.h>
56
57 #include <machine/atomic.h>
58 #include <machine/bus.h>
59 #include <machine/stdarg.h>
60 #include <machine/resource.h>
61
62 #include <sys/bus.h>
63 #include <sys/rman.h>
64
65 #include <vm/vm.h>
66 #include <vm/vm_param.h>
67 #include <vm/pmap.h>
68 #include <vm/uma.h>
69 #include <vm/vm_kern.h>
70 #include <vm/vm_map.h>
71 #include <vm/vm_extern.h>
72
73 #include <compat/ndis/pe_var.h>
74 #include <compat/ndis/cfg_var.h>
75 #include <compat/ndis/resource_var.h>
76 #include <compat/ndis/ntoskrnl_var.h>
77 #include <compat/ndis/hal_var.h>
78 #include <compat/ndis/ndis_var.h>
79
80 #ifdef NTOSKRNL_DEBUG_TIMERS
81 static int sysctl_show_timers(SYSCTL_HANDLER_ARGS);
82
83 SYSCTL_PROC(_debug, OID_AUTO, ntoskrnl_timers, CTLTYPE_INT | CTLFLAG_RW,
84 NULL, 0, sysctl_show_timers, "I",
85 "Show ntoskrnl timer stats");
86 #endif
87
88 struct kdpc_queue {
89 list_entry kq_disp;
90 struct thread *kq_td;
91 int kq_cpu;
92 int kq_exit;
93 int kq_running;
94 kspin_lock kq_lock;
95 nt_kevent kq_proc;
96 nt_kevent kq_done;
97 };
98
99 typedef struct kdpc_queue kdpc_queue;
100
101 struct wb_ext {
102 struct cv we_cv;
103 struct thread *we_td;
104 };
105
106 typedef struct wb_ext wb_ext;
107
108 #define NTOSKRNL_TIMEOUTS 256
109 #ifdef NTOSKRNL_DEBUG_TIMERS
110 static uint64_t ntoskrnl_timer_fires;
111 static uint64_t ntoskrnl_timer_sets;
112 static uint64_t ntoskrnl_timer_reloads;
113 static uint64_t ntoskrnl_timer_cancels;
114 #endif
115
116 struct callout_entry {
117 struct callout ce_callout;
118 list_entry ce_list;
119 };
120
121 typedef struct callout_entry callout_entry;
122
123 static struct list_entry ntoskrnl_calllist;
124 static struct mtx ntoskrnl_calllock;
125 struct kuser_shared_data kuser_shared_data;
126
127 static struct list_entry ntoskrnl_intlist;
128 static kspin_lock ntoskrnl_intlock;
129
130 static uint8_t RtlEqualUnicodeString(unicode_string *,
131 unicode_string *, uint8_t);
132 static void RtlCopyString(ansi_string *, const ansi_string *);
133 static void RtlCopyUnicodeString(unicode_string *,
134 unicode_string *);
135 static irp *IoBuildSynchronousFsdRequest(uint32_t, device_object *,
136 void *, uint32_t, uint64_t *, nt_kevent *, io_status_block *);
137 static irp *IoBuildAsynchronousFsdRequest(uint32_t,
138 device_object *, void *, uint32_t, uint64_t *, io_status_block *);
139 static irp *IoBuildDeviceIoControlRequest(uint32_t,
140 device_object *, void *, uint32_t, void *, uint32_t,
141 uint8_t, nt_kevent *, io_status_block *);
142 static irp *IoAllocateIrp(uint8_t, uint8_t);
143 static void IoReuseIrp(irp *, uint32_t);
144 static void IoFreeIrp(irp *);
145 static void IoInitializeIrp(irp *, uint16_t, uint8_t);
146 static irp *IoMakeAssociatedIrp(irp *, uint8_t);
147 static uint32_t KeWaitForMultipleObjects(uint32_t,
148 nt_dispatch_header **, uint32_t, uint32_t, uint32_t, uint8_t,
149 int64_t *, wait_block *);
150 static void ntoskrnl_waittest(nt_dispatch_header *, uint32_t);
151 static void ntoskrnl_satisfy_wait(nt_dispatch_header *, struct thread *);
152 static void ntoskrnl_satisfy_multiple_waits(wait_block *);
153 static int ntoskrnl_is_signalled(nt_dispatch_header *, struct thread *);
154 static void ntoskrnl_insert_timer(ktimer *, int);
155 static void ntoskrnl_remove_timer(ktimer *);
156 #ifdef NTOSKRNL_DEBUG_TIMERS
157 static void ntoskrnl_show_timers(void);
158 #endif
159 static void ntoskrnl_timercall(void *);
160 static void ntoskrnl_dpc_thread(void *);
161 static void ntoskrnl_destroy_dpc_threads(void);
162 static void ntoskrnl_destroy_workitem_threads(void);
163 static void ntoskrnl_workitem_thread(void *);
164 static void ntoskrnl_workitem(device_object *, void *);
165 static void ntoskrnl_unicode_to_ascii(uint16_t *, char *, int);
166 static void ntoskrnl_ascii_to_unicode(char *, uint16_t *, int);
167 static uint8_t ntoskrnl_insert_dpc(list_entry *, kdpc *);
168 static void WRITE_REGISTER_USHORT(uint16_t *, uint16_t);
169 static uint16_t READ_REGISTER_USHORT(uint16_t *);
170 static void WRITE_REGISTER_ULONG(uint32_t *, uint32_t);
171 static uint32_t READ_REGISTER_ULONG(uint32_t *);
172 static void WRITE_REGISTER_UCHAR(uint8_t *, uint8_t);
173 static uint8_t READ_REGISTER_UCHAR(uint8_t *);
174 static int64_t _allmul(int64_t, int64_t);
175 static int64_t _alldiv(int64_t, int64_t);
176 static int64_t _allrem(int64_t, int64_t);
177 static int64_t _allshr(int64_t, uint8_t);
178 static int64_t _allshl(int64_t, uint8_t);
179 static uint64_t _aullmul(uint64_t, uint64_t);
180 static uint64_t _aulldiv(uint64_t, uint64_t);
181 static uint64_t _aullrem(uint64_t, uint64_t);
182 static uint64_t _aullshr(uint64_t, uint8_t);
183 static uint64_t _aullshl(uint64_t, uint8_t);
184 static slist_entry *ntoskrnl_pushsl(slist_header *, slist_entry *);
185 static void InitializeSListHead(slist_header *);
186 static slist_entry *ntoskrnl_popsl(slist_header *);
187 static void ExFreePoolWithTag(void *, uint32_t);
188 static void ExInitializePagedLookasideList(paged_lookaside_list *,
189 lookaside_alloc_func *, lookaside_free_func *,
190 uint32_t, size_t, uint32_t, uint16_t);
191 static void ExDeletePagedLookasideList(paged_lookaside_list *);
192 static void ExInitializeNPagedLookasideList(npaged_lookaside_list *,
193 lookaside_alloc_func *, lookaside_free_func *,
194 uint32_t, size_t, uint32_t, uint16_t);
195 static void ExDeleteNPagedLookasideList(npaged_lookaside_list *);
196 static slist_entry
197 *ExInterlockedPushEntrySList(slist_header *,
198 slist_entry *, kspin_lock *);
199 static slist_entry
200 *ExInterlockedPopEntrySList(slist_header *, kspin_lock *);
201 static uint32_t InterlockedIncrement(volatile uint32_t *);
202 static uint32_t InterlockedDecrement(volatile uint32_t *);
203 static void ExInterlockedAddLargeStatistic(uint64_t *, uint32_t);
204 static void *MmAllocateContiguousMemory(uint32_t, uint64_t);
205 static void *MmAllocateContiguousMemorySpecifyCache(uint32_t,
206 uint64_t, uint64_t, uint64_t, enum nt_caching_type);
207 static void MmFreeContiguousMemory(void *);
208 static void MmFreeContiguousMemorySpecifyCache(void *, uint32_t,
209 enum nt_caching_type);
210 static uint32_t MmSizeOfMdl(void *, size_t);
211 static void *MmMapLockedPages(mdl *, uint8_t);
212 static void *MmMapLockedPagesSpecifyCache(mdl *,
213 uint8_t, uint32_t, void *, uint32_t, uint32_t);
214 static void MmUnmapLockedPages(void *, mdl *);
215 static device_t ntoskrnl_finddev(device_t, uint64_t, struct resource **);
216 static void RtlZeroMemory(void *, size_t);
217 static void RtlSecureZeroMemory(void *, size_t);
218 static void RtlFillMemory(void *, size_t, uint8_t);
219 static void RtlMoveMemory(void *, const void *, size_t);
220 static ndis_status RtlCharToInteger(const char *, uint32_t, uint32_t *);
221 static void RtlCopyMemory(void *, const void *, size_t);
222 static size_t RtlCompareMemory(const void *, const void *, size_t);
223 static ndis_status RtlUnicodeStringToInteger(unicode_string *,
224 uint32_t, uint32_t *);
225 static int atoi (const char *);
226 static long atol (const char *);
227 static int rand(void);
228 static void srand(unsigned int);
229 static void KeQuerySystemTime(uint64_t *);
230 static uint32_t KeTickCount(void);
231 static uint8_t IoIsWdmVersionAvailable(uint8_t, uint8_t);
232 static int32_t IoOpenDeviceRegistryKey(struct device_object *, uint32_t,
233 uint32_t, void **);
234 static void ntoskrnl_thrfunc(void *);
235 static ndis_status PsCreateSystemThread(ndis_handle *,
236 uint32_t, void *, ndis_handle, void *, void *, void *);
237 static ndis_status PsTerminateSystemThread(ndis_status);
238 static ndis_status IoGetDeviceObjectPointer(unicode_string *,
239 uint32_t, void *, device_object *);
240 static ndis_status IoGetDeviceProperty(device_object *, uint32_t,
241 uint32_t, void *, uint32_t *);
242 static void KeInitializeMutex(kmutant *, uint32_t);
243 static uint32_t KeReleaseMutex(kmutant *, uint8_t);
244 static uint32_t KeReadStateMutex(kmutant *);
245 static ndis_status ObReferenceObjectByHandle(ndis_handle,
246 uint32_t, void *, uint8_t, void **, void **);
247 static void ObfDereferenceObject(void *);
248 static uint32_t ZwClose(ndis_handle);
249 static uint32_t WmiQueryTraceInformation(uint32_t, void *, uint32_t,
250 uint32_t, void *);
251 static uint32_t WmiTraceMessage(uint64_t, uint32_t, void *, uint16_t, ...);
252 static uint32_t IoWMIRegistrationControl(device_object *, uint32_t);
253 static void *ntoskrnl_memset(void *, int, size_t);
254 static void *ntoskrnl_memmove(void *, void *, size_t);
255 static void *ntoskrnl_memchr(void *, unsigned char, size_t);
256 static char *ntoskrnl_strstr(char *, char *);
257 static char *ntoskrnl_strncat(char *, char *, size_t);
258 static int ntoskrnl_toupper(int);
259 static int ntoskrnl_tolower(int);
260 static funcptr ntoskrnl_findwrap(funcptr);
261 static uint32_t DbgPrint(char *, ...);
262 static void DbgBreakPoint(void);
263 static void KeBugCheckEx(uint32_t, u_long, u_long, u_long, u_long);
264 static int32_t KeDelayExecutionThread(uint8_t, uint8_t, int64_t *);
265 static int32_t KeSetPriorityThread(struct thread *, int32_t);
266 static void dummy(void);
267
268 static struct mtx ntoskrnl_dispatchlock;
269 static struct mtx ntoskrnl_interlock;
270 static kspin_lock ntoskrnl_cancellock;
271 static int ntoskrnl_kth = 0;
272 static struct nt_objref_head ntoskrnl_reflist;
273 static uma_zone_t mdl_zone;
274 static uma_zone_t iw_zone;
275 static struct kdpc_queue *kq_queues;
276 static struct kdpc_queue *wq_queues;
277 static int wq_idx = 0;
278
279 int
280 ntoskrnl_libinit()
281 {
282 image_patch_table *patch;
283 int error;
284 struct proc *p;
285 kdpc_queue *kq;
286 callout_entry *e;
287 int i;
288
289 mtx_init(&ntoskrnl_dispatchlock,
290 "ntoskrnl dispatch lock", MTX_NDIS_LOCK, MTX_DEF|MTX_RECURSE);
291 mtx_init(&ntoskrnl_interlock, MTX_NTOSKRNL_SPIN_LOCK, NULL, MTX_SPIN);
292 KeInitializeSpinLock(&ntoskrnl_cancellock);
293 KeInitializeSpinLock(&ntoskrnl_intlock);
294 TAILQ_INIT(&ntoskrnl_reflist);
295
296 InitializeListHead(&ntoskrnl_calllist);
297 InitializeListHead(&ntoskrnl_intlist);
298 mtx_init(&ntoskrnl_calllock, MTX_NTOSKRNL_SPIN_LOCK, NULL, MTX_SPIN);
299
300 kq_queues = ExAllocatePoolWithTag(NonPagedPool,
301 #ifdef NTOSKRNL_MULTIPLE_DPCS
302 sizeof(kdpc_queue) * mp_ncpus, 0);
303 #else
304 sizeof(kdpc_queue), 0);
305 #endif
306
307 if (kq_queues == NULL)
308 return (ENOMEM);
309
310 wq_queues = ExAllocatePoolWithTag(NonPagedPool,
311 sizeof(kdpc_queue) * WORKITEM_THREADS, 0);
312
313 if (wq_queues == NULL)
314 return (ENOMEM);
315
316 #ifdef NTOSKRNL_MULTIPLE_DPCS
317 bzero((char *)kq_queues, sizeof(kdpc_queue) * mp_ncpus);
318 #else
319 bzero((char *)kq_queues, sizeof(kdpc_queue));
320 #endif
321 bzero((char *)wq_queues, sizeof(kdpc_queue) * WORKITEM_THREADS);
322
323 /*
324 * Launch the DPC threads.
325 */
326
327 #ifdef NTOSKRNL_MULTIPLE_DPCS
328 for (i = 0; i < mp_ncpus; i++) {
329 #else
330 for (i = 0; i < 1; i++) {
331 #endif
332 kq = kq_queues + i;
333 kq->kq_cpu = i;
334 error = kproc_create(ntoskrnl_dpc_thread, kq, &p,
335 RFHIGHPID, NDIS_KSTACK_PAGES, "Windows DPC %d", i);
336 if (error)
337 panic("failed to launch DPC thread");
338 }
339
340 /*
341 * Launch the workitem threads.
342 */
343
344 for (i = 0; i < WORKITEM_THREADS; i++) {
345 kq = wq_queues + i;
346 error = kproc_create(ntoskrnl_workitem_thread, kq, &p,
347 RFHIGHPID, NDIS_KSTACK_PAGES, "Windows Workitem %d", i);
348 if (error)
349 panic("failed to launch workitem thread");
350 }
351
352 patch = ntoskrnl_functbl;
353 while (patch->ipt_func != NULL) {
354 windrv_wrap((funcptr)patch->ipt_func,
355 (funcptr *)&patch->ipt_wrap,
356 patch->ipt_argcnt, patch->ipt_ftype);
357 patch++;
358 }
359
360 for (i = 0; i < NTOSKRNL_TIMEOUTS; i++) {
361 e = ExAllocatePoolWithTag(NonPagedPool,
362 sizeof(callout_entry), 0);
363 if (e == NULL)
364 panic("failed to allocate timeouts");
365 mtx_lock_spin(&ntoskrnl_calllock);
366 InsertHeadList((&ntoskrnl_calllist), (&e->ce_list));
367 mtx_unlock_spin(&ntoskrnl_calllock);
368 }
369
370 /*
371 * MDLs are supposed to be variable size (they describe
372 * buffers containing some number of pages, but we don't
373 * know ahead of time how many pages that will be). But
374 * always allocating them off the heap is very slow. As
375 * a compromise, we create an MDL UMA zone big enough to
376 * handle any buffer requiring up to 16 pages, and we
377 * use those for any MDLs for buffers of 16 pages or less
378 * in size. For buffers larger than that (which we assume
379 * will be few and far between, we allocate the MDLs off
380 * the heap.
381 */
382
383 mdl_zone = uma_zcreate("Windows MDL", MDL_ZONE_SIZE,
384 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
385
386 iw_zone = uma_zcreate("Windows WorkItem", sizeof(io_workitem),
387 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
388
389 return (0);
390 }
391
392 int
393 ntoskrnl_libfini()
394 {
395 image_patch_table *patch;
396 callout_entry *e;
397 list_entry *l;
398
399 patch = ntoskrnl_functbl;
400 while (patch->ipt_func != NULL) {
401 windrv_unwrap(patch->ipt_wrap);
402 patch++;
403 }
404
405 /* Stop the workitem queues. */
406 ntoskrnl_destroy_workitem_threads();
407 /* Stop the DPC queues. */
408 ntoskrnl_destroy_dpc_threads();
409
410 ExFreePool(kq_queues);
411 ExFreePool(wq_queues);
412
413 uma_zdestroy(mdl_zone);
414 uma_zdestroy(iw_zone);
415
416 mtx_lock_spin(&ntoskrnl_calllock);
417 while(!IsListEmpty(&ntoskrnl_calllist)) {
418 l = RemoveHeadList(&ntoskrnl_calllist);
419 e = CONTAINING_RECORD(l, callout_entry, ce_list);
420 mtx_unlock_spin(&ntoskrnl_calllock);
421 ExFreePool(e);
422 mtx_lock_spin(&ntoskrnl_calllock);
423 }
424 mtx_unlock_spin(&ntoskrnl_calllock);
425
426 mtx_destroy(&ntoskrnl_dispatchlock);
427 mtx_destroy(&ntoskrnl_interlock);
428 mtx_destroy(&ntoskrnl_calllock);
429
430 return (0);
431 }
432
433 /*
434 * We need to be able to reference this externally from the wrapper;
435 * GCC only generates a local implementation of memset.
436 */
437 static void *
438 ntoskrnl_memset(buf, ch, size)
439 void *buf;
440 int ch;
441 size_t size;
442 {
443 return (memset(buf, ch, size));
444 }
445
446 static void *
447 ntoskrnl_memmove(dst, src, size)
448 void *src;
449 void *dst;
450 size_t size;
451 {
452 bcopy(src, dst, size);
453 return (dst);
454 }
455
456 static void *
457 ntoskrnl_memchr(void *buf, unsigned char ch, size_t len)
458 {
459 if (len != 0) {
460 unsigned char *p = buf;
461
462 do {
463 if (*p++ == ch)
464 return (p - 1);
465 } while (--len != 0);
466 }
467 return (NULL);
468 }
469
470 static char *
471 ntoskrnl_strstr(s, find)
472 char *s, *find;
473 {
474 char c, sc;
475 size_t len;
476
477 if ((c = *find++) != 0) {
478 len = strlen(find);
479 do {
480 do {
481 if ((sc = *s++) == 0)
482 return (NULL);
483 } while (sc != c);
484 } while (strncmp(s, find, len) != 0);
485 s--;
486 }
487 return ((char *)s);
488 }
489
490 /* Taken from libc */
491 static char *
492 ntoskrnl_strncat(dst, src, n)
493 char *dst;
494 char *src;
495 size_t n;
496 {
497 if (n != 0) {
498 char *d = dst;
499 const char *s = src;
500
501 while (*d != 0)
502 d++;
503 do {
504 if ((*d = *s++) == 0)
505 break;
506 d++;
507 } while (--n != 0);
508 *d = 0;
509 }
510 return (dst);
511 }
512
513 static int
514 ntoskrnl_toupper(c)
515 int c;
516 {
517 return (toupper(c));
518 }
519
520 static int
521 ntoskrnl_tolower(c)
522 int c;
523 {
524 return (tolower(c));
525 }
526
527 static uint8_t
528 RtlEqualUnicodeString(unicode_string *str1, unicode_string *str2,
529 uint8_t caseinsensitive)
530 {
531 int i;
532
533 if (str1->us_len != str2->us_len)
534 return (FALSE);
535
536 for (i = 0; i < str1->us_len; i++) {
537 if (caseinsensitive == TRUE) {
538 if (toupper((char)(str1->us_buf[i] & 0xFF)) !=
539 toupper((char)(str2->us_buf[i] & 0xFF)))
540 return (FALSE);
541 } else {
542 if (str1->us_buf[i] != str2->us_buf[i])
543 return (FALSE);
544 }
545 }
546
547 return (TRUE);
548 }
549
550 static void
551 RtlCopyString(dst, src)
552 ansi_string *dst;
553 const ansi_string *src;
554 {
555 if (src != NULL && src->as_buf != NULL && dst->as_buf != NULL) {
556 dst->as_len = min(src->as_len, dst->as_maxlen);
557 memcpy(dst->as_buf, src->as_buf, dst->as_len);
558 if (dst->as_len < dst->as_maxlen)
559 dst->as_buf[dst->as_len] = 0;
560 } else
561 dst->as_len = 0;
562 }
563
564 static void
565 RtlCopyUnicodeString(dest, src)
566 unicode_string *dest;
567 unicode_string *src;
568 {
569
570 if (dest->us_maxlen >= src->us_len)
571 dest->us_len = src->us_len;
572 else
573 dest->us_len = dest->us_maxlen;
574 memcpy(dest->us_buf, src->us_buf, dest->us_len);
575 }
576
577 static void
578 ntoskrnl_ascii_to_unicode(ascii, unicode, len)
579 char *ascii;
580 uint16_t *unicode;
581 int len;
582 {
583 int i;
584 uint16_t *ustr;
585
586 ustr = unicode;
587 for (i = 0; i < len; i++) {
588 *ustr = (uint16_t)ascii[i];
589 ustr++;
590 }
591 }
592
593 static void
594 ntoskrnl_unicode_to_ascii(unicode, ascii, len)
595 uint16_t *unicode;
596 char *ascii;
597 int len;
598 {
599 int i;
600 uint8_t *astr;
601
602 astr = ascii;
603 for (i = 0; i < len / 2; i++) {
604 *astr = (uint8_t)unicode[i];
605 astr++;
606 }
607 }
608
609 uint32_t
610 RtlUnicodeStringToAnsiString(ansi_string *dest, unicode_string *src, uint8_t allocate)
611 {
612 if (dest == NULL || src == NULL)
613 return (STATUS_INVALID_PARAMETER);
614
615 dest->as_len = src->us_len / 2;
616 if (dest->as_maxlen < dest->as_len)
617 dest->as_len = dest->as_maxlen;
618
619 if (allocate == TRUE) {
620 dest->as_buf = ExAllocatePoolWithTag(NonPagedPool,
621 (src->us_len / 2) + 1, 0);
622 if (dest->as_buf == NULL)
623 return (STATUS_INSUFFICIENT_RESOURCES);
624 dest->as_len = dest->as_maxlen = src->us_len / 2;
625 } else {
626 dest->as_len = src->us_len / 2; /* XXX */
627 if (dest->as_maxlen < dest->as_len)
628 dest->as_len = dest->as_maxlen;
629 }
630
631 ntoskrnl_unicode_to_ascii(src->us_buf, dest->as_buf,
632 dest->as_len * 2);
633
634 return (STATUS_SUCCESS);
635 }
636
637 uint32_t
638 RtlAnsiStringToUnicodeString(unicode_string *dest, ansi_string *src,
639 uint8_t allocate)
640 {
641 if (dest == NULL || src == NULL)
642 return (STATUS_INVALID_PARAMETER);
643
644 if (allocate == TRUE) {
645 dest->us_buf = ExAllocatePoolWithTag(NonPagedPool,
646 src->as_len * 2, 0);
647 if (dest->us_buf == NULL)
648 return (STATUS_INSUFFICIENT_RESOURCES);
649 dest->us_len = dest->us_maxlen = strlen(src->as_buf) * 2;
650 } else {
651 dest->us_len = src->as_len * 2; /* XXX */
652 if (dest->us_maxlen < dest->us_len)
653 dest->us_len = dest->us_maxlen;
654 }
655
656 ntoskrnl_ascii_to_unicode(src->as_buf, dest->us_buf,
657 dest->us_len / 2);
658
659 return (STATUS_SUCCESS);
660 }
661
662 void *
663 ExAllocatePoolWithTag(pooltype, len, tag)
664 uint32_t pooltype;
665 size_t len;
666 uint32_t tag;
667 {
668 void *buf;
669
670 buf = malloc(len, M_DEVBUF, M_NOWAIT|M_ZERO);
671 if (buf == NULL)
672 return (NULL);
673
674 return (buf);
675 }
676
677 static void
678 ExFreePoolWithTag(buf, tag)
679 void *buf;
680 uint32_t tag;
681 {
682 ExFreePool(buf);
683 }
684
685 void
686 ExFreePool(buf)
687 void *buf;
688 {
689 free(buf, M_DEVBUF);
690 }
691
692 uint32_t
693 IoAllocateDriverObjectExtension(drv, clid, extlen, ext)
694 driver_object *drv;
695 void *clid;
696 uint32_t extlen;
697 void **ext;
698 {
699 custom_extension *ce;
700
701 ce = ExAllocatePoolWithTag(NonPagedPool, sizeof(custom_extension)
702 + extlen, 0);
703
704 if (ce == NULL)
705 return (STATUS_INSUFFICIENT_RESOURCES);
706
707 ce->ce_clid = clid;
708 InsertTailList((&drv->dro_driverext->dre_usrext), (&ce->ce_list));
709
710 *ext = (void *)(ce + 1);
711
712 return (STATUS_SUCCESS);
713 }
714
715 void *
716 IoGetDriverObjectExtension(drv, clid)
717 driver_object *drv;
718 void *clid;
719 {
720 list_entry *e;
721 custom_extension *ce;
722
723 /*
724 * Sanity check. Our dummy bus drivers don't have
725 * any driver extensions.
726 */
727
728 if (drv->dro_driverext == NULL)
729 return (NULL);
730
731 e = drv->dro_driverext->dre_usrext.nle_flink;
732 while (e != &drv->dro_driverext->dre_usrext) {
733 ce = (custom_extension *)e;
734 if (ce->ce_clid == clid)
735 return ((void *)(ce + 1));
736 e = e->nle_flink;
737 }
738
739 return (NULL);
740 }
741
742
743 uint32_t
744 IoCreateDevice(driver_object *drv, uint32_t devextlen, unicode_string *devname,
745 uint32_t devtype, uint32_t devchars, uint8_t exclusive,
746 device_object **newdev)
747 {
748 device_object *dev;
749
750 dev = ExAllocatePoolWithTag(NonPagedPool, sizeof(device_object), 0);
751 if (dev == NULL)
752 return (STATUS_INSUFFICIENT_RESOURCES);
753
754 dev->do_type = devtype;
755 dev->do_drvobj = drv;
756 dev->do_currirp = NULL;
757 dev->do_flags = 0;
758
759 if (devextlen) {
760 dev->do_devext = ExAllocatePoolWithTag(NonPagedPool,
761 devextlen, 0);
762
763 if (dev->do_devext == NULL) {
764 ExFreePool(dev);
765 return (STATUS_INSUFFICIENT_RESOURCES);
766 }
767
768 bzero(dev->do_devext, devextlen);
769 } else
770 dev->do_devext = NULL;
771
772 dev->do_size = sizeof(device_object) + devextlen;
773 dev->do_refcnt = 1;
774 dev->do_attacheddev = NULL;
775 dev->do_nextdev = NULL;
776 dev->do_devtype = devtype;
777 dev->do_stacksize = 1;
778 dev->do_alignreq = 1;
779 dev->do_characteristics = devchars;
780 dev->do_iotimer = NULL;
781 KeInitializeEvent(&dev->do_devlock, EVENT_TYPE_SYNC, TRUE);
782
783 /*
784 * Vpd is used for disk/tape devices,
785 * but we don't support those. (Yet.)
786 */
787 dev->do_vpb = NULL;
788
789 dev->do_devobj_ext = ExAllocatePoolWithTag(NonPagedPool,
790 sizeof(devobj_extension), 0);
791
792 if (dev->do_devobj_ext == NULL) {
793 if (dev->do_devext != NULL)
794 ExFreePool(dev->do_devext);
795 ExFreePool(dev);
796 return (STATUS_INSUFFICIENT_RESOURCES);
797 }
798
799 dev->do_devobj_ext->dve_type = 0;
800 dev->do_devobj_ext->dve_size = sizeof(devobj_extension);
801 dev->do_devobj_ext->dve_devobj = dev;
802
803 /*
804 * Attach this device to the driver object's list
805 * of devices. Note: this is not the same as attaching
806 * the device to the device stack. The driver's AddDevice
807 * routine must explicitly call IoAddDeviceToDeviceStack()
808 * to do that.
809 */
810
811 if (drv->dro_devobj == NULL) {
812 drv->dro_devobj = dev;
813 dev->do_nextdev = NULL;
814 } else {
815 dev->do_nextdev = drv->dro_devobj;
816 drv->dro_devobj = dev;
817 }
818
819 *newdev = dev;
820
821 return (STATUS_SUCCESS);
822 }
823
824 void
825 IoDeleteDevice(dev)
826 device_object *dev;
827 {
828 device_object *prev;
829
830 if (dev == NULL)
831 return;
832
833 if (dev->do_devobj_ext != NULL)
834 ExFreePool(dev->do_devobj_ext);
835
836 if (dev->do_devext != NULL)
837 ExFreePool(dev->do_devext);
838
839 /* Unlink the device from the driver's device list. */
840
841 prev = dev->do_drvobj->dro_devobj;
842 if (prev == dev)
843 dev->do_drvobj->dro_devobj = dev->do_nextdev;
844 else {
845 while (prev->do_nextdev != dev)
846 prev = prev->do_nextdev;
847 prev->do_nextdev = dev->do_nextdev;
848 }
849
850 ExFreePool(dev);
851 }
852
853 device_object *
854 IoGetAttachedDevice(dev)
855 device_object *dev;
856 {
857 device_object *d;
858
859 if (dev == NULL)
860 return (NULL);
861
862 d = dev;
863
864 while (d->do_attacheddev != NULL)
865 d = d->do_attacheddev;
866
867 return (d);
868 }
869
870 static irp *
871 IoBuildSynchronousFsdRequest(func, dobj, buf, len, off, event, status)
872 uint32_t func;
873 device_object *dobj;
874 void *buf;
875 uint32_t len;
876 uint64_t *off;
877 nt_kevent *event;
878 io_status_block *status;
879 {
880 irp *ip;
881
882 ip = IoBuildAsynchronousFsdRequest(func, dobj, buf, len, off, status);
883 if (ip == NULL)
884 return (NULL);
885 ip->irp_usrevent = event;
886
887 return (ip);
888 }
889
890 static irp *
891 IoBuildAsynchronousFsdRequest(func, dobj, buf, len, off, status)
892 uint32_t func;
893 device_object *dobj;
894 void *buf;
895 uint32_t len;
896 uint64_t *off;
897 io_status_block *status;
898 {
899 irp *ip;
900 io_stack_location *sl;
901
902 ip = IoAllocateIrp(dobj->do_stacksize, TRUE);
903 if (ip == NULL)
904 return (NULL);
905
906 ip->irp_usriostat = status;
907 ip->irp_tail.irp_overlay.irp_thread = NULL;
908
909 sl = IoGetNextIrpStackLocation(ip);
910 sl->isl_major = func;
911 sl->isl_minor = 0;
912 sl->isl_flags = 0;
913 sl->isl_ctl = 0;
914 sl->isl_devobj = dobj;
915 sl->isl_fileobj = NULL;
916 sl->isl_completionfunc = NULL;
917
918 ip->irp_userbuf = buf;
919
920 if (dobj->do_flags & DO_BUFFERED_IO) {
921 ip->irp_assoc.irp_sysbuf =
922 ExAllocatePoolWithTag(NonPagedPool, len, 0);
923 if (ip->irp_assoc.irp_sysbuf == NULL) {
924 IoFreeIrp(ip);
925 return (NULL);
926 }
927 bcopy(buf, ip->irp_assoc.irp_sysbuf, len);
928 }
929
930 if (dobj->do_flags & DO_DIRECT_IO) {
931 ip->irp_mdl = IoAllocateMdl(buf, len, FALSE, FALSE, ip);
932 if (ip->irp_mdl == NULL) {
933 if (ip->irp_assoc.irp_sysbuf != NULL)
934 ExFreePool(ip->irp_assoc.irp_sysbuf);
935 IoFreeIrp(ip);
936 return (NULL);
937 }
938 ip->irp_userbuf = NULL;
939 ip->irp_assoc.irp_sysbuf = NULL;
940 }
941
942 if (func == IRP_MJ_READ) {
943 sl->isl_parameters.isl_read.isl_len = len;
944 if (off != NULL)
945 sl->isl_parameters.isl_read.isl_byteoff = *off;
946 else
947 sl->isl_parameters.isl_read.isl_byteoff = 0;
948 }
949
950 if (func == IRP_MJ_WRITE) {
951 sl->isl_parameters.isl_write.isl_len = len;
952 if (off != NULL)
953 sl->isl_parameters.isl_write.isl_byteoff = *off;
954 else
955 sl->isl_parameters.isl_write.isl_byteoff = 0;
956 }
957
958 return (ip);
959 }
960
961 static irp *
962 IoBuildDeviceIoControlRequest(uint32_t iocode, device_object *dobj, void *ibuf,
963 uint32_t ilen, void *obuf, uint32_t olen, uint8_t isinternal,
964 nt_kevent *event, io_status_block *status)
965 {
966 irp *ip;
967 io_stack_location *sl;
968 uint32_t buflen;
969
970 ip = IoAllocateIrp(dobj->do_stacksize, TRUE);
971 if (ip == NULL)
972 return (NULL);
973 ip->irp_usrevent = event;
974 ip->irp_usriostat = status;
975 ip->irp_tail.irp_overlay.irp_thread = NULL;
976
977 sl = IoGetNextIrpStackLocation(ip);
978 sl->isl_major = isinternal == TRUE ?
979 IRP_MJ_INTERNAL_DEVICE_CONTROL : IRP_MJ_DEVICE_CONTROL;
980 sl->isl_minor = 0;
981 sl->isl_flags = 0;
982 sl->isl_ctl = 0;
983 sl->isl_devobj = dobj;
984 sl->isl_fileobj = NULL;
985 sl->isl_completionfunc = NULL;
986 sl->isl_parameters.isl_ioctl.isl_iocode = iocode;
987 sl->isl_parameters.isl_ioctl.isl_ibuflen = ilen;
988 sl->isl_parameters.isl_ioctl.isl_obuflen = olen;
989
990 switch(IO_METHOD(iocode)) {
991 case METHOD_BUFFERED:
992 if (ilen > olen)
993 buflen = ilen;
994 else
995 buflen = olen;
996 if (buflen) {
997 ip->irp_assoc.irp_sysbuf =
998 ExAllocatePoolWithTag(NonPagedPool, buflen, 0);
999 if (ip->irp_assoc.irp_sysbuf == NULL) {
1000 IoFreeIrp(ip);
1001 return (NULL);
1002 }
1003 }
1004 if (ilen && ibuf != NULL) {
1005 bcopy(ibuf, ip->irp_assoc.irp_sysbuf, ilen);
1006 bzero((char *)ip->irp_assoc.irp_sysbuf + ilen,
1007 buflen - ilen);
1008 } else
1009 bzero(ip->irp_assoc.irp_sysbuf, ilen);
1010 ip->irp_userbuf = obuf;
1011 break;
1012 case METHOD_IN_DIRECT:
1013 case METHOD_OUT_DIRECT:
1014 if (ilen && ibuf != NULL) {
1015 ip->irp_assoc.irp_sysbuf =
1016 ExAllocatePoolWithTag(NonPagedPool, ilen, 0);
1017 if (ip->irp_assoc.irp_sysbuf == NULL) {
1018 IoFreeIrp(ip);
1019 return (NULL);
1020 }
1021 bcopy(ibuf, ip->irp_assoc.irp_sysbuf, ilen);
1022 }
1023 if (olen && obuf != NULL) {
1024 ip->irp_mdl = IoAllocateMdl(obuf, olen,
1025 FALSE, FALSE, ip);
1026 /*
1027 * Normally we would MmProbeAndLockPages()
1028 * here, but we don't have to in our
1029 * imlementation.
1030 */
1031 }
1032 break;
1033 case METHOD_NEITHER:
1034 ip->irp_userbuf = obuf;
1035 sl->isl_parameters.isl_ioctl.isl_type3ibuf = ibuf;
1036 break;
1037 default:
1038 break;
1039 }
1040
1041 /*
1042 * Ideally, we should associate this IRP with the calling
1043 * thread here.
1044 */
1045
1046 return (ip);
1047 }
1048
1049 static irp *
1050 IoAllocateIrp(uint8_t stsize, uint8_t chargequota)
1051 {
1052 irp *i;
1053
1054 i = ExAllocatePoolWithTag(NonPagedPool, IoSizeOfIrp(stsize), 0);
1055 if (i == NULL)
1056 return (NULL);
1057
1058 IoInitializeIrp(i, IoSizeOfIrp(stsize), stsize);
1059
1060 return (i);
1061 }
1062
1063 static irp *
1064 IoMakeAssociatedIrp(irp *ip, uint8_t stsize)
1065 {
1066 irp *associrp;
1067
1068 associrp = IoAllocateIrp(stsize, FALSE);
1069 if (associrp == NULL)
1070 return (NULL);
1071
1072 mtx_lock(&ntoskrnl_dispatchlock);
1073 associrp->irp_flags |= IRP_ASSOCIATED_IRP;
1074 associrp->irp_tail.irp_overlay.irp_thread =
1075 ip->irp_tail.irp_overlay.irp_thread;
1076 associrp->irp_assoc.irp_master = ip;
1077 mtx_unlock(&ntoskrnl_dispatchlock);
1078
1079 return (associrp);
1080 }
1081
1082 static void
1083 IoFreeIrp(ip)
1084 irp *ip;
1085 {
1086 ExFreePool(ip);
1087 }
1088
1089 static void
1090 IoInitializeIrp(irp *io, uint16_t psize, uint8_t ssize)
1091 {
1092 bzero((char *)io, IoSizeOfIrp(ssize));
1093 io->irp_size = psize;
1094 io->irp_stackcnt = ssize;
1095 io->irp_currentstackloc = ssize;
1096 InitializeListHead(&io->irp_thlist);
1097 io->irp_tail.irp_overlay.irp_csl =
1098 (io_stack_location *)(io + 1) + ssize;
1099 }
1100
1101 static void
1102 IoReuseIrp(ip, status)
1103 irp *ip;
1104 uint32_t status;
1105 {
1106 uint8_t allocflags;
1107
1108 allocflags = ip->irp_allocflags;
1109 IoInitializeIrp(ip, ip->irp_size, ip->irp_stackcnt);
1110 ip->irp_iostat.isb_status = status;
1111 ip->irp_allocflags = allocflags;
1112 }
1113
1114 void
1115 IoAcquireCancelSpinLock(uint8_t *irql)
1116 {
1117 KeAcquireSpinLock(&ntoskrnl_cancellock, irql);
1118 }
1119
1120 void
1121 IoReleaseCancelSpinLock(uint8_t irql)
1122 {
1123 KeReleaseSpinLock(&ntoskrnl_cancellock, irql);
1124 }
1125
1126 uint8_t
1127 IoCancelIrp(irp *ip)
1128 {
1129 cancel_func cfunc;
1130 uint8_t cancelirql;
1131
1132 IoAcquireCancelSpinLock(&cancelirql);
1133 cfunc = IoSetCancelRoutine(ip, NULL);
1134 ip->irp_cancel = TRUE;
1135 if (cfunc == NULL) {
1136 IoReleaseCancelSpinLock(cancelirql);
1137 return (FALSE);
1138 }
1139 ip->irp_cancelirql = cancelirql;
1140 MSCALL2(cfunc, IoGetCurrentIrpStackLocation(ip)->isl_devobj, ip);
1141 return (uint8_t)IoSetCancelValue(ip, TRUE);
1142 }
1143
1144 uint32_t
1145 IofCallDriver(dobj, ip)
1146 device_object *dobj;
1147 irp *ip;
1148 {
1149 driver_object *drvobj;
1150 io_stack_location *sl;
1151 uint32_t status;
1152 driver_dispatch disp;
1153
1154 drvobj = dobj->do_drvobj;
1155
1156 if (ip->irp_currentstackloc <= 0)
1157 panic("IoCallDriver(): out of stack locations");
1158
1159 IoSetNextIrpStackLocation(ip);
1160 sl = IoGetCurrentIrpStackLocation(ip);
1161
1162 sl->isl_devobj = dobj;
1163
1164 disp = drvobj->dro_dispatch[sl->isl_major];
1165 status = MSCALL2(disp, dobj, ip);
1166
1167 return (status);
1168 }
1169
1170 void
1171 IofCompleteRequest(irp *ip, uint8_t prioboost)
1172 {
1173 uint32_t status;
1174 device_object *dobj;
1175 io_stack_location *sl;
1176 completion_func cf;
1177
1178 KASSERT(ip->irp_iostat.isb_status != STATUS_PENDING,
1179 ("incorrect IRP(%p) status (STATUS_PENDING)", ip));
1180
1181 sl = IoGetCurrentIrpStackLocation(ip);
1182 IoSkipCurrentIrpStackLocation(ip);
1183
1184 do {
1185 if (sl->isl_ctl & SL_PENDING_RETURNED)
1186 ip->irp_pendingreturned = TRUE;
1187
1188 if (ip->irp_currentstackloc != (ip->irp_stackcnt + 1))
1189 dobj = IoGetCurrentIrpStackLocation(ip)->isl_devobj;
1190 else
1191 dobj = NULL;
1192
1193 if (sl->isl_completionfunc != NULL &&
1194 ((ip->irp_iostat.isb_status == STATUS_SUCCESS &&
1195 sl->isl_ctl & SL_INVOKE_ON_SUCCESS) ||
1196 (ip->irp_iostat.isb_status != STATUS_SUCCESS &&
1197 sl->isl_ctl & SL_INVOKE_ON_ERROR) ||
1198 (ip->irp_cancel == TRUE &&
1199 sl->isl_ctl & SL_INVOKE_ON_CANCEL))) {
1200 cf = sl->isl_completionfunc;
1201 status = MSCALL3(cf, dobj, ip, sl->isl_completionctx);
1202 if (status == STATUS_MORE_PROCESSING_REQUIRED)
1203 return;
1204 } else {
1205 if ((ip->irp_currentstackloc <= ip->irp_stackcnt) &&
1206 (ip->irp_pendingreturned == TRUE))
1207 IoMarkIrpPending(ip);
1208 }
1209
1210 /* move to the next. */
1211 IoSkipCurrentIrpStackLocation(ip);
1212 sl++;
1213 } while (ip->irp_currentstackloc <= (ip->irp_stackcnt + 1));
1214
1215 if (ip->irp_usriostat != NULL)
1216 *ip->irp_usriostat = ip->irp_iostat;
1217 if (ip->irp_usrevent != NULL)
1218 KeSetEvent(ip->irp_usrevent, prioboost, FALSE);
1219
1220 /* Handle any associated IRPs. */
1221
1222 if (ip->irp_flags & IRP_ASSOCIATED_IRP) {
1223 uint32_t masterirpcnt;
1224 irp *masterirp;
1225 mdl *m;
1226
1227 masterirp = ip->irp_assoc.irp_master;
1228 masterirpcnt =
1229 InterlockedDecrement(&masterirp->irp_assoc.irp_irpcnt);
1230
1231 while ((m = ip->irp_mdl) != NULL) {
1232 ip->irp_mdl = m->mdl_next;
1233 IoFreeMdl(m);
1234 }
1235 IoFreeIrp(ip);
1236 if (masterirpcnt == 0)
1237 IoCompleteRequest(masterirp, IO_NO_INCREMENT);
1238 return;
1239 }
1240
1241 /* With any luck, these conditions will never arise. */
1242
1243 if (ip->irp_flags & IRP_PAGING_IO) {
1244 if (ip->irp_mdl != NULL)
1245 IoFreeMdl(ip->irp_mdl);
1246 IoFreeIrp(ip);
1247 }
1248 }
1249
1250 void
1251 ntoskrnl_intr(arg)
1252 void *arg;
1253 {
1254 kinterrupt *iobj;
1255 uint8_t irql;
1256 uint8_t claimed;
1257 list_entry *l;
1258
1259 KeAcquireSpinLock(&ntoskrnl_intlock, &irql);
1260 l = ntoskrnl_intlist.nle_flink;
1261 while (l != &ntoskrnl_intlist) {
1262 iobj = CONTAINING_RECORD(l, kinterrupt, ki_list);
1263 claimed = MSCALL2(iobj->ki_svcfunc, iobj, iobj->ki_svcctx);
1264 if (claimed == TRUE)
1265 break;
1266 l = l->nle_flink;
1267 }
1268 KeReleaseSpinLock(&ntoskrnl_intlock, irql);
1269 }
1270
1271 uint8_t
1272 KeAcquireInterruptSpinLock(iobj)
1273 kinterrupt *iobj;
1274 {
1275 uint8_t irql;
1276 KeAcquireSpinLock(&ntoskrnl_intlock, &irql);
1277 return (irql);
1278 }
1279
1280 void
1281 KeReleaseInterruptSpinLock(kinterrupt *iobj, uint8_t irql)
1282 {
1283 KeReleaseSpinLock(&ntoskrnl_intlock, irql);
1284 }
1285
1286 uint8_t
1287 KeSynchronizeExecution(iobj, syncfunc, syncctx)
1288 kinterrupt *iobj;
1289 void *syncfunc;
1290 void *syncctx;
1291 {
1292 uint8_t irql;
1293
1294 KeAcquireSpinLock(&ntoskrnl_intlock, &irql);
1295 MSCALL1(syncfunc, syncctx);
1296 KeReleaseSpinLock(&ntoskrnl_intlock, irql);
1297
1298 return (TRUE);
1299 }
1300
1301 /*
1302 * IoConnectInterrupt() is passed only the interrupt vector and
1303 * irql that a device wants to use, but no device-specific tag
1304 * of any kind. This conflicts rather badly with FreeBSD's
1305 * bus_setup_intr(), which needs the device_t for the device
1306 * requesting interrupt delivery. In order to bypass this
1307 * inconsistency, we implement a second level of interrupt
1308 * dispatching on top of bus_setup_intr(). All devices use
1309 * ntoskrnl_intr() as their ISR, and any device requesting
1310 * interrupts will be registered with ntoskrnl_intr()'s interrupt
1311 * dispatch list. When an interrupt arrives, we walk the list
1312 * and invoke all the registered ISRs. This effectively makes all
1313 * interrupts shared, but it's the only way to duplicate the
1314 * semantics of IoConnectInterrupt() and IoDisconnectInterrupt() properly.
1315 */
1316
1317 uint32_t
1318 IoConnectInterrupt(kinterrupt **iobj, void *svcfunc, void *svcctx,
1319 kspin_lock *lock, uint32_t vector, uint8_t irql, uint8_t syncirql,
1320 uint8_t imode, uint8_t shared, uint32_t affinity, uint8_t savefloat)
1321 {
1322 uint8_t curirql;
1323
1324 *iobj = ExAllocatePoolWithTag(NonPagedPool, sizeof(kinterrupt), 0);
1325 if (*iobj == NULL)
1326 return (STATUS_INSUFFICIENT_RESOURCES);
1327
1328 (*iobj)->ki_svcfunc = svcfunc;
1329 (*iobj)->ki_svcctx = svcctx;
1330
1331 if (lock == NULL) {
1332 KeInitializeSpinLock(&(*iobj)->ki_lock_priv);
1333 (*iobj)->ki_lock = &(*iobj)->ki_lock_priv;
1334 } else
1335 (*iobj)->ki_lock = lock;
1336
1337 KeAcquireSpinLock(&ntoskrnl_intlock, &curirql);
1338 InsertHeadList((&ntoskrnl_intlist), (&(*iobj)->ki_list));
1339 KeReleaseSpinLock(&ntoskrnl_intlock, curirql);
1340
1341 return (STATUS_SUCCESS);
1342 }
1343
1344 void
1345 IoDisconnectInterrupt(iobj)
1346 kinterrupt *iobj;
1347 {
1348 uint8_t irql;
1349
1350 if (iobj == NULL)
1351 return;
1352
1353 KeAcquireSpinLock(&ntoskrnl_intlock, &irql);
1354 RemoveEntryList((&iobj->ki_list));
1355 KeReleaseSpinLock(&ntoskrnl_intlock, irql);
1356
1357 ExFreePool(iobj);
1358 }
1359
1360 device_object *
1361 IoAttachDeviceToDeviceStack(src, dst)
1362 device_object *src;
1363 device_object *dst;
1364 {
1365 device_object *attached;
1366
1367 mtx_lock(&ntoskrnl_dispatchlock);
1368 attached = IoGetAttachedDevice(dst);
1369 attached->do_attacheddev = src;
1370 src->do_attacheddev = NULL;
1371 src->do_stacksize = attached->do_stacksize + 1;
1372 mtx_unlock(&ntoskrnl_dispatchlock);
1373
1374 return (attached);
1375 }
1376
1377 void
1378 IoDetachDevice(topdev)
1379 device_object *topdev;
1380 {
1381 device_object *tail;
1382
1383 mtx_lock(&ntoskrnl_dispatchlock);
1384
1385 /* First, break the chain. */
1386 tail = topdev->do_attacheddev;
1387 if (tail == NULL) {
1388 mtx_unlock(&ntoskrnl_dispatchlock);
1389 return;
1390 }
1391 topdev->do_attacheddev = tail->do_attacheddev;
1392 topdev->do_refcnt--;
1393
1394 /* Now reduce the stacksize count for the takm_il objects. */
1395
1396 tail = topdev->do_attacheddev;
1397 while (tail != NULL) {
1398 tail->do_stacksize--;
1399 tail = tail->do_attacheddev;
1400 }
1401
1402 mtx_unlock(&ntoskrnl_dispatchlock);
1403 }
1404
1405 /*
1406 * For the most part, an object is considered signalled if
1407 * dh_sigstate == TRUE. The exception is for mutant objects
1408 * (mutexes), where the logic works like this:
1409 *
1410 * - If the thread already owns the object and sigstate is
1411 * less than or equal to 0, then the object is considered
1412 * signalled (recursive acquisition).
1413 * - If dh_sigstate == 1, the object is also considered
1414 * signalled.
1415 */
1416
1417 static int
1418 ntoskrnl_is_signalled(obj, td)
1419 nt_dispatch_header *obj;
1420 struct thread *td;
1421 {
1422 kmutant *km;
1423
1424 if (obj->dh_type == DISP_TYPE_MUTANT) {
1425 km = (kmutant *)obj;
1426 if ((obj->dh_sigstate <= 0 && km->km_ownerthread == td) ||
1427 obj->dh_sigstate == 1)
1428 return (TRUE);
1429 return (FALSE);
1430 }
1431
1432 if (obj->dh_sigstate > 0)
1433 return (TRUE);
1434 return (FALSE);
1435 }
1436
1437 static void
1438 ntoskrnl_satisfy_wait(obj, td)
1439 nt_dispatch_header *obj;
1440 struct thread *td;
1441 {
1442 kmutant *km;
1443
1444 switch (obj->dh_type) {
1445 case DISP_TYPE_MUTANT:
1446 km = (struct kmutant *)obj;
1447 obj->dh_sigstate--;
1448 /*
1449 * If sigstate reaches 0, the mutex is now
1450 * non-signalled (the new thread owns it).
1451 */
1452 if (obj->dh_sigstate == 0) {
1453 km->km_ownerthread = td;
1454 if (km->km_abandoned == TRUE)
1455 km->km_abandoned = FALSE;
1456 }
1457 break;
1458 /* Synchronization objects get reset to unsignalled. */
1459 case DISP_TYPE_SYNCHRONIZATION_EVENT:
1460 case DISP_TYPE_SYNCHRONIZATION_TIMER:
1461 obj->dh_sigstate = 0;
1462 break;
1463 case DISP_TYPE_SEMAPHORE:
1464 obj->dh_sigstate--;
1465 break;
1466 default:
1467 break;
1468 }
1469 }
1470
1471 static void
1472 ntoskrnl_satisfy_multiple_waits(wb)
1473 wait_block *wb;
1474 {
1475 wait_block *cur;
1476 struct thread *td;
1477
1478 cur = wb;
1479 td = wb->wb_kthread;
1480
1481 do {
1482 ntoskrnl_satisfy_wait(wb->wb_object, td);
1483 cur->wb_awakened = TRUE;
1484 cur = cur->wb_next;
1485 } while (cur != wb);
1486 }
1487
1488 /* Always called with dispatcher lock held. */
1489 static void
1490 ntoskrnl_waittest(obj, increment)
1491 nt_dispatch_header *obj;
1492 uint32_t increment;
1493 {
1494 wait_block *w, *next;
1495 list_entry *e;
1496 struct thread *td;
1497 wb_ext *we;
1498 int satisfied;
1499
1500 /*
1501 * Once an object has been signalled, we walk its list of
1502 * wait blocks. If a wait block can be awakened, then satisfy
1503 * waits as necessary and wake the thread.
1504 *
1505 * The rules work like this:
1506 *
1507 * If a wait block is marked as WAITTYPE_ANY, then
1508 * we can satisfy the wait conditions on the current
1509 * object and wake the thread right away. Satisfying
1510 * the wait also has the effect of breaking us out
1511 * of the search loop.
1512 *
1513 * If the object is marked as WAITTYLE_ALL, then the
1514 * wait block will be part of a circularly linked
1515 * list of wait blocks belonging to a waiting thread
1516 * that's sleeping in KeWaitForMultipleObjects(). In
1517 * order to wake the thread, all the objects in the
1518 * wait list must be in the signalled state. If they
1519 * are, we then satisfy all of them and wake the
1520 * thread.
1521 *
1522 */
1523
1524 e = obj->dh_waitlisthead.nle_flink;
1525
1526 while (e != &obj->dh_waitlisthead && obj->dh_sigstate > 0) {
1527 w = CONTAINING_RECORD(e, wait_block, wb_waitlist);
1528 we = w->wb_ext;
1529 td = we->we_td;
1530 satisfied = FALSE;
1531 if (w->wb_waittype == WAITTYPE_ANY) {
1532 /*
1533 * Thread can be awakened if
1534 * any wait is satisfied.
1535 */
1536 ntoskrnl_satisfy_wait(obj, td);
1537 satisfied = TRUE;
1538 w->wb_awakened = TRUE;
1539 } else {
1540 /*
1541 * Thread can only be woken up
1542 * if all waits are satisfied.
1543 * If the thread is waiting on multiple
1544 * objects, they should all be linked
1545 * through the wb_next pointers in the
1546 * wait blocks.
1547 */
1548 satisfied = TRUE;
1549 next = w->wb_next;
1550 while (next != w) {
1551 if (ntoskrnl_is_signalled(obj, td) == FALSE) {
1552 satisfied = FALSE;
1553 break;
1554 }
1555 next = next->wb_next;
1556 }
1557 ntoskrnl_satisfy_multiple_waits(w);
1558 }
1559
1560 if (satisfied == TRUE)
1561 cv_broadcastpri(&we->we_cv,
1562 (w->wb_oldpri - (increment * 4)) > PRI_MIN_KERN ?
1563 w->wb_oldpri - (increment * 4) : PRI_MIN_KERN);
1564
1565 e = e->nle_flink;
1566 }
1567 }
1568
1569 /*
1570 * Return the number of 100 nanosecond intervals since
1571 * January 1, 1601. (?!?!)
1572 */
1573 void
1574 ntoskrnl_time(tval)
1575 uint64_t *tval;
1576 {
1577 struct timespec ts;
1578
1579 nanotime(&ts);
1580 *tval = (uint64_t)ts.tv_nsec / 100 + (uint64_t)ts.tv_sec * 10000000 +
1581 11644473600 * 10000000; /* 100ns ticks from 1601 to 1970 */
1582 }
1583
1584 static void
1585 KeQuerySystemTime(current_time)
1586 uint64_t *current_time;
1587 {
1588 ntoskrnl_time(current_time);
1589 }
1590
1591 static uint32_t
1592 KeTickCount(void)
1593 {
1594 struct timeval tv;
1595 getmicrouptime(&tv);
1596 return tvtohz(&tv);
1597 }
1598
1599
1600 /*
1601 * KeWaitForSingleObject() is a tricky beast, because it can be used
1602 * with several different object types: semaphores, timers, events,
1603 * mutexes and threads. Semaphores don't appear very often, but the
1604 * other object types are quite common. KeWaitForSingleObject() is
1605 * what's normally used to acquire a mutex, and it can be used to
1606 * wait for a thread termination.
1607 *
1608 * The Windows NDIS API is implemented in terms of Windows kernel
1609 * primitives, and some of the object manipulation is duplicated in
1610 * NDIS. For example, NDIS has timers and events, which are actually
1611 * Windows kevents and ktimers. Now, you're supposed to only use the
1612 * NDIS variants of these objects within the confines of the NDIS API,
1613 * but there are some naughty developers out there who will use
1614 * KeWaitForSingleObject() on NDIS timer and event objects, so we
1615 * have to support that as well. Conseqently, our NDIS timer and event
1616 * code has to be closely tied into our ntoskrnl timer and event code,
1617 * just as it is in Windows.
1618 *
1619 * KeWaitForSingleObject() may do different things for different kinds
1620 * of objects:
1621 *
1622 * - For events, we check if the event has been signalled. If the
1623 * event is already in the signalled state, we just return immediately,
1624 * otherwise we wait for it to be set to the signalled state by someone
1625 * else calling KeSetEvent(). Events can be either synchronization or
1626 * notification events.
1627 *
1628 * - For timers, if the timer has already fired and the timer is in
1629 * the signalled state, we just return, otherwise we wait on the
1630 * timer. Unlike an event, timers get signalled automatically when
1631 * they expire rather than someone having to trip them manually.
1632 * Timers initialized with KeInitializeTimer() are always notification
1633 * events: KeInitializeTimerEx() lets you initialize a timer as
1634 * either a notification or synchronization event.
1635 *
1636 * - For mutexes, we try to acquire the mutex and if we can't, we wait
1637 * on the mutex until it's available and then grab it. When a mutex is
1638 * released, it enters the signalled state, which wakes up one of the
1639 * threads waiting to acquire it. Mutexes are always synchronization
1640 * events.
1641 *
1642 * - For threads, the only thing we do is wait until the thread object
1643 * enters a signalled state, which occurs when the thread terminates.
1644 * Threads are always notification events.
1645 *
1646 * A notification event wakes up all threads waiting on an object. A
1647 * synchronization event wakes up just one. Also, a synchronization event
1648 * is auto-clearing, which means we automatically set the event back to
1649 * the non-signalled state once the wakeup is done.
1650 */
1651
1652 uint32_t
1653 KeWaitForSingleObject(void *arg, uint32_t reason, uint32_t mode,
1654 uint8_t alertable, int64_t *duetime)
1655 {
1656 wait_block w;
1657 struct thread *td = curthread;
1658 struct timeval tv;
1659 int error = 0;
1660 uint64_t curtime;
1661 wb_ext we;
1662 nt_dispatch_header *obj;
1663
1664 obj = arg;
1665
1666 if (obj == NULL)
1667 return (STATUS_INVALID_PARAMETER);
1668
1669 mtx_lock(&ntoskrnl_dispatchlock);
1670
1671 cv_init(&we.we_cv, "KeWFS");
1672 we.we_td = td;
1673
1674 /*
1675 * Check to see if this object is already signalled,
1676 * and just return without waiting if it is.
1677 */
1678 if (ntoskrnl_is_signalled(obj, td) == TRUE) {
1679 /* Sanity check the signal state value. */
1680 if (obj->dh_sigstate != INT32_MIN) {
1681 ntoskrnl_satisfy_wait(obj, curthread);
1682 mtx_unlock(&ntoskrnl_dispatchlock);
1683 return (STATUS_SUCCESS);
1684 } else {
1685 /*
1686 * There's a limit to how many times we can
1687 * recursively acquire a mutant. If we hit
1688 * the limit, something is very wrong.
1689 */
1690 if (obj->dh_type == DISP_TYPE_MUTANT) {
1691 mtx_unlock(&ntoskrnl_dispatchlock);
1692 panic("mutant limit exceeded");
1693 }
1694 }
1695 }
1696
1697 bzero((char *)&w, sizeof(wait_block));
1698 w.wb_object = obj;
1699 w.wb_ext = &we;
1700 w.wb_waittype = WAITTYPE_ANY;
1701 w.wb_next = &w;
1702 w.wb_waitkey = 0;
1703 w.wb_awakened = FALSE;
1704 w.wb_oldpri = td->td_priority;
1705
1706 InsertTailList((&obj->dh_waitlisthead), (&w.wb_waitlist));
1707
1708 /*
1709 * The timeout value is specified in 100 nanosecond units
1710 * and can be a positive or negative number. If it's positive,
1711 * then the duetime is absolute, and we need to convert it
1712 * to an absolute offset relative to now in order to use it.
1713 * If it's negative, then the duetime is relative and we
1714 * just have to convert the units.
1715 */
1716
1717 if (duetime != NULL) {
1718 if (*duetime < 0) {
1719 tv.tv_sec = - (*duetime) / 10000000;
1720 tv.tv_usec = (- (*duetime) / 10) -
1721 (tv.tv_sec * 1000000);
1722 } else {
1723 ntoskrnl_time(&curtime);
1724 if (*duetime < curtime)
1725 tv.tv_sec = tv.tv_usec = 0;
1726 else {
1727 tv.tv_sec = ((*duetime) - curtime) / 10000000;
1728 tv.tv_usec = ((*duetime) - curtime) / 10 -
1729 (tv.tv_sec * 1000000);
1730 }
1731 }
1732 }
1733
1734 if (duetime == NULL)
1735 cv_wait(&we.we_cv, &ntoskrnl_dispatchlock);
1736 else
1737 error = cv_timedwait(&we.we_cv,
1738 &ntoskrnl_dispatchlock, tvtohz(&tv));
1739
1740 RemoveEntryList(&w.wb_waitlist);
1741
1742 cv_destroy(&we.we_cv);
1743
1744 /* We timed out. Leave the object alone and return status. */
1745
1746 if (error == EWOULDBLOCK) {
1747 mtx_unlock(&ntoskrnl_dispatchlock);
1748 return (STATUS_TIMEOUT);
1749 }
1750
1751 mtx_unlock(&ntoskrnl_dispatchlock);
1752
1753 return (STATUS_SUCCESS);
1754 /*
1755 return (KeWaitForMultipleObjects(1, &obj, WAITTYPE_ALL, reason,
1756 mode, alertable, duetime, &w));
1757 */
1758 }
1759
1760 static uint32_t
1761 KeWaitForMultipleObjects(uint32_t cnt, nt_dispatch_header *obj[], uint32_t wtype,
1762 uint32_t reason, uint32_t mode, uint8_t alertable, int64_t *duetime,
1763 wait_block *wb_array)
1764 {
1765 struct thread *td = curthread;
1766 wait_block *whead, *w;
1767 wait_block _wb_array[MAX_WAIT_OBJECTS];
1768 nt_dispatch_header *cur;
1769 struct timeval tv;
1770 int i, wcnt = 0, error = 0;
1771 uint64_t curtime;
1772 struct timespec t1, t2;
1773 uint32_t status = STATUS_SUCCESS;
1774 wb_ext we;
1775
1776 if (cnt > MAX_WAIT_OBJECTS)
1777 return (STATUS_INVALID_PARAMETER);
1778 if (cnt > THREAD_WAIT_OBJECTS && wb_array == NULL)
1779 return (STATUS_INVALID_PARAMETER);
1780
1781 mtx_lock(&ntoskrnl_dispatchlock);
1782
1783 cv_init(&we.we_cv, "KeWFM");
1784 we.we_td = td;
1785
1786 if (wb_array == NULL)
1787 whead = _wb_array;
1788 else
1789 whead = wb_array;
1790
1791 bzero((char *)whead, sizeof(wait_block) * cnt);
1792
1793 /* First pass: see if we can satisfy any waits immediately. */
1794
1795 wcnt = 0;
1796 w = whead;
1797
1798 for (i = 0; i < cnt; i++) {
1799 InsertTailList((&obj[i]->dh_waitlisthead),
1800 (&w->wb_waitlist));
1801 w->wb_ext = &we;
1802 w->wb_object = obj[i];
1803 w->wb_waittype = wtype;
1804 w->wb_waitkey = i;
1805 w->wb_awakened = FALSE;
1806 w->wb_oldpri = td->td_priority;
1807 w->wb_next = w + 1;
1808 w++;
1809 wcnt++;
1810 if (ntoskrnl_is_signalled(obj[i], td)) {
1811 /*
1812 * There's a limit to how many times
1813 * we can recursively acquire a mutant.
1814 * If we hit the limit, something
1815 * is very wrong.
1816 */
1817 if (obj[i]->dh_sigstate == INT32_MIN &&
1818 obj[i]->dh_type == DISP_TYPE_MUTANT) {
1819 mtx_unlock(&ntoskrnl_dispatchlock);
1820 panic("mutant limit exceeded");
1821 }
1822
1823 /*
1824 * If this is a WAITTYPE_ANY wait, then
1825 * satisfy the waited object and exit
1826 * right now.
1827 */
1828
1829 if (wtype == WAITTYPE_ANY) {
1830 ntoskrnl_satisfy_wait(obj[i], td);
1831 status = STATUS_WAIT_0 + i;
1832 goto wait_done;
1833 } else {
1834 w--;
1835 wcnt--;
1836 w->wb_object = NULL;
1837 RemoveEntryList(&w->wb_waitlist);
1838 }
1839 }
1840 }
1841
1842 /*
1843 * If this is a WAITTYPE_ALL wait and all objects are
1844 * already signalled, satisfy the waits and exit now.
1845 */
1846
1847 if (wtype == WAITTYPE_ALL && wcnt == 0) {
1848 for (i = 0; i < cnt; i++)
1849 ntoskrnl_satisfy_wait(obj[i], td);
1850 status = STATUS_SUCCESS;
1851 goto wait_done;
1852 }
1853
1854 /*
1855 * Create a circular waitblock list. The waitcount
1856 * must always be non-zero when we get here.
1857 */
1858
1859 (w - 1)->wb_next = whead;
1860
1861 /* Wait on any objects that aren't yet signalled. */
1862
1863 /* Calculate timeout, if any. */
1864
1865 if (duetime != NULL) {
1866 if (*duetime < 0) {
1867 tv.tv_sec = - (*duetime) / 10000000;
1868 tv.tv_usec = (- (*duetime) / 10) -
1869 (tv.tv_sec * 1000000);
1870 } else {
1871 ntoskrnl_time(&curtime);
1872 if (*duetime < curtime)
1873 tv.tv_sec = tv.tv_usec = 0;
1874 else {
1875 tv.tv_sec = ((*duetime) - curtime) / 10000000;
1876 tv.tv_usec = ((*duetime) - curtime) / 10 -
1877 (tv.tv_sec * 1000000);
1878 }
1879 }
1880 }
1881
1882 while (wcnt) {
1883 nanotime(&t1);
1884
1885 if (duetime == NULL)
1886 cv_wait(&we.we_cv, &ntoskrnl_dispatchlock);
1887 else
1888 error = cv_timedwait(&we.we_cv,
1889 &ntoskrnl_dispatchlock, tvtohz(&tv));
1890
1891 /* Wait with timeout expired. */
1892
1893 if (error) {
1894 status = STATUS_TIMEOUT;
1895 goto wait_done;
1896 }
1897
1898 nanotime(&t2);
1899
1900 /* See what's been signalled. */
1901
1902 w = whead;
1903 do {
1904 cur = w->wb_object;
1905 if (ntoskrnl_is_signalled(cur, td) == TRUE ||
1906 w->wb_awakened == TRUE) {
1907 /* Sanity check the signal state value. */
1908 if (cur->dh_sigstate == INT32_MIN &&
1909 cur->dh_type == DISP_TYPE_MUTANT) {
1910 mtx_unlock(&ntoskrnl_dispatchlock);
1911 panic("mutant limit exceeded");
1912 }
1913 wcnt--;
1914 if (wtype == WAITTYPE_ANY) {
1915 status = w->wb_waitkey &
1916 STATUS_WAIT_0;
1917 goto wait_done;
1918 }
1919 }
1920 w = w->wb_next;
1921 } while (w != whead);
1922
1923 /*
1924 * If all objects have been signalled, or if this
1925 * is a WAITTYPE_ANY wait and we were woke up by
1926 * someone, we can bail.
1927 */
1928
1929 if (wcnt == 0) {
1930 status = STATUS_SUCCESS;
1931 goto wait_done;
1932 }
1933
1934 /*
1935 * If this is WAITTYPE_ALL wait, and there's still
1936 * objects that haven't been signalled, deduct the
1937 * time that's elapsed so far from the timeout and
1938 * wait again (or continue waiting indefinitely if
1939 * there's no timeout).
1940 */
1941
1942 if (duetime != NULL) {
1943 tv.tv_sec -= (t2.tv_sec - t1.tv_sec);
1944 tv.tv_usec -= (t2.tv_nsec - t1.tv_nsec) / 1000;
1945 }
1946 }
1947
1948
1949 wait_done:
1950
1951 cv_destroy(&we.we_cv);
1952
1953 for (i = 0; i < cnt; i++) {
1954 if (whead[i].wb_object != NULL)
1955 RemoveEntryList(&whead[i].wb_waitlist);
1956
1957 }
1958 mtx_unlock(&ntoskrnl_dispatchlock);
1959
1960 return (status);
1961 }
1962
1963 static void
1964 WRITE_REGISTER_USHORT(uint16_t *reg, uint16_t val)
1965 {
1966 bus_space_write_2(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg, val);
1967 }
1968
1969 static uint16_t
1970 READ_REGISTER_USHORT(reg)
1971 uint16_t *reg;
1972 {
1973 return (bus_space_read_2(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg));
1974 }
1975
1976 static void
1977 WRITE_REGISTER_ULONG(reg, val)
1978 uint32_t *reg;
1979 uint32_t val;
1980 {
1981 bus_space_write_4(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg, val);
1982 }
1983
1984 static uint32_t
1985 READ_REGISTER_ULONG(reg)
1986 uint32_t *reg;
1987 {
1988 return (bus_space_read_4(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg));
1989 }
1990
1991 static uint8_t
1992 READ_REGISTER_UCHAR(uint8_t *reg)
1993 {
1994 return (bus_space_read_1(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg));
1995 }
1996
1997 static void
1998 WRITE_REGISTER_UCHAR(uint8_t *reg, uint8_t val)
1999 {
2000 bus_space_write_1(NDIS_BUS_SPACE_MEM, 0x0, (bus_size_t)reg, val);
2001 }
2002
2003 static int64_t
2004 _allmul(a, b)
2005 int64_t a;
2006 int64_t b;
2007 {
2008 return (a * b);
2009 }
2010
2011 static int64_t
2012 _alldiv(a, b)
2013 int64_t a;
2014 int64_t b;
2015 {
2016 return (a / b);
2017 }
2018
2019 static int64_t
2020 _allrem(a, b)
2021 int64_t a;
2022 int64_t b;
2023 {
2024 return (a % b);
2025 }
2026
2027 static uint64_t
2028 _aullmul(a, b)
2029 uint64_t a;
2030 uint64_t b;
2031 {
2032 return (a * b);
2033 }
2034
2035 static uint64_t
2036 _aulldiv(a, b)
2037 uint64_t a;
2038 uint64_t b;
2039 {
2040 return (a / b);
2041 }
2042
2043 static uint64_t
2044 _aullrem(a, b)
2045 uint64_t a;
2046 uint64_t b;
2047 {
2048 return (a % b);
2049 }
2050
2051 static int64_t
2052 _allshl(int64_t a, uint8_t b)
2053 {
2054 return (a << b);
2055 }
2056
2057 static uint64_t
2058 _aullshl(uint64_t a, uint8_t b)
2059 {
2060 return (a << b);
2061 }
2062
2063 static int64_t
2064 _allshr(int64_t a, uint8_t b)
2065 {
2066 return (a >> b);
2067 }
2068
2069 static uint64_t
2070 _aullshr(uint64_t a, uint8_t b)
2071 {
2072 return (a >> b);
2073 }
2074
2075 static slist_entry *
2076 ntoskrnl_pushsl(head, entry)
2077 slist_header *head;
2078 slist_entry *entry;
2079 {
2080 slist_entry *oldhead;
2081
2082 oldhead = head->slh_list.slh_next;
2083 entry->sl_next = head->slh_list.slh_next;
2084 head->slh_list.slh_next = entry;
2085 head->slh_list.slh_depth++;
2086 head->slh_list.slh_seq++;
2087
2088 return (oldhead);
2089 }
2090
2091 static void
2092 InitializeSListHead(head)
2093 slist_header *head;
2094 {
2095 memset(head, 0, sizeof(*head));
2096 }
2097
2098 static slist_entry *
2099 ntoskrnl_popsl(head)
2100 slist_header *head;
2101 {
2102 slist_entry *first;
2103
2104 first = head->slh_list.slh_next;
2105 if (first != NULL) {
2106 head->slh_list.slh_next = first->sl_next;
2107 head->slh_list.slh_depth--;
2108 head->slh_list.slh_seq++;
2109 }
2110
2111 return (first);
2112 }
2113
2114 /*
2115 * We need this to make lookaside lists work for amd64.
2116 * We pass a pointer to ExAllocatePoolWithTag() the lookaside
2117 * list structure. For amd64 to work right, this has to be a
2118 * pointer to the wrapped version of the routine, not the
2119 * original. Letting the Windows driver invoke the original
2120 * function directly will result in a convention calling
2121 * mismatch and a pretty crash. On x86, this effectively
2122 * becomes a no-op since ipt_func and ipt_wrap are the same.
2123 */
2124
2125 static funcptr
2126 ntoskrnl_findwrap(func)
2127 funcptr func;
2128 {
2129 image_patch_table *patch;
2130
2131 patch = ntoskrnl_functbl;
2132 while (patch->ipt_func != NULL) {
2133 if ((funcptr)patch->ipt_func == func)
2134 return ((funcptr)patch->ipt_wrap);
2135 patch++;
2136 }
2137
2138 return (NULL);
2139 }
2140
2141 static void
2142 ExInitializePagedLookasideList(paged_lookaside_list *lookaside,
2143 lookaside_alloc_func *allocfunc, lookaside_free_func *freefunc,
2144 uint32_t flags, size_t size, uint32_t tag, uint16_t depth)
2145 {
2146 bzero((char *)lookaside, sizeof(paged_lookaside_list));
2147
2148 if (size < sizeof(slist_entry))
2149 lookaside->nll_l.gl_size = sizeof(slist_entry);
2150 else
2151 lookaside->nll_l.gl_size = size;
2152 lookaside->nll_l.gl_tag = tag;
2153 if (allocfunc == NULL)
2154 lookaside->nll_l.gl_allocfunc =
2155 ntoskrnl_findwrap((funcptr)ExAllocatePoolWithTag);
2156 else
2157 lookaside->nll_l.gl_allocfunc = allocfunc;
2158
2159 if (freefunc == NULL)
2160 lookaside->nll_l.gl_freefunc =
2161 ntoskrnl_findwrap((funcptr)ExFreePool);
2162 else
2163 lookaside->nll_l.gl_freefunc = freefunc;
2164
2165 #ifdef __i386__
2166 KeInitializeSpinLock(&lookaside->nll_obsoletelock);
2167 #endif
2168
2169 lookaside->nll_l.gl_type = NonPagedPool;
2170 lookaside->nll_l.gl_depth = depth;
2171 lookaside->nll_l.gl_maxdepth = LOOKASIDE_DEPTH;
2172 }
2173
2174 static void
2175 ExDeletePagedLookasideList(lookaside)
2176 paged_lookaside_list *lookaside;
2177 {
2178 void *buf;
2179 void (*freefunc)(void *);
2180
2181 freefunc = lookaside->nll_l.gl_freefunc;
2182 while((buf = ntoskrnl_popsl(&lookaside->nll_l.gl_listhead)) != NULL)
2183 MSCALL1(freefunc, buf);
2184 }
2185
2186 static void
2187 ExInitializeNPagedLookasideList(npaged_lookaside_list *lookaside,
2188 lookaside_alloc_func *allocfunc, lookaside_free_func *freefunc,
2189 uint32_t flags, size_t size, uint32_t tag, uint16_t depth)
2190 {
2191 bzero((char *)lookaside, sizeof(npaged_lookaside_list));
2192
2193 if (size < sizeof(slist_entry))
2194 lookaside->nll_l.gl_size = sizeof(slist_entry);
2195 else
2196 lookaside->nll_l.gl_size = size;
2197 lookaside->nll_l.gl_tag = tag;
2198 if (allocfunc == NULL)
2199 lookaside->nll_l.gl_allocfunc =
2200 ntoskrnl_findwrap((funcptr)ExAllocatePoolWithTag);
2201 else
2202 lookaside->nll_l.gl_allocfunc = allocfunc;
2203
2204 if (freefunc == NULL)
2205 lookaside->nll_l.gl_freefunc =
2206 ntoskrnl_findwrap((funcptr)ExFreePool);
2207 else
2208 lookaside->nll_l.gl_freefunc = freefunc;
2209
2210 #ifdef __i386__
2211 KeInitializeSpinLock(&lookaside->nll_obsoletelock);
2212 #endif
2213
2214 lookaside->nll_l.gl_type = NonPagedPool;
2215 lookaside->nll_l.gl_depth = depth;
2216 lookaside->nll_l.gl_maxdepth = LOOKASIDE_DEPTH;
2217 }
2218
2219 static void
2220 ExDeleteNPagedLookasideList(lookaside)
2221 npaged_lookaside_list *lookaside;
2222 {
2223 void *buf;
2224 void (*freefunc)(void *);
2225
2226 freefunc = lookaside->nll_l.gl_freefunc;
2227 while((buf = ntoskrnl_popsl(&lookaside->nll_l.gl_listhead)) != NULL)
2228 MSCALL1(freefunc, buf);
2229 }
2230
2231 slist_entry *
2232 InterlockedPushEntrySList(head, entry)
2233 slist_header *head;
2234 slist_entry *entry;
2235 {
2236 slist_entry *oldhead;
2237
2238 mtx_lock_spin(&ntoskrnl_interlock);
2239 oldhead = ntoskrnl_pushsl(head, entry);
2240 mtx_unlock_spin(&ntoskrnl_interlock);
2241
2242 return (oldhead);
2243 }
2244
2245 slist_entry *
2246 InterlockedPopEntrySList(head)
2247 slist_header *head;
2248 {
2249 slist_entry *first;
2250
2251 mtx_lock_spin(&ntoskrnl_interlock);
2252 first = ntoskrnl_popsl(head);
2253 mtx_unlock_spin(&ntoskrnl_interlock);
2254
2255 return (first);
2256 }
2257
2258 static slist_entry *
2259 ExInterlockedPushEntrySList(head, entry, lock)
2260 slist_header *head;
2261 slist_entry *entry;
2262 kspin_lock *lock;
2263 {
2264 return (InterlockedPushEntrySList(head, entry));
2265 }
2266
2267 static slist_entry *
2268 ExInterlockedPopEntrySList(head, lock)
2269 slist_header *head;
2270 kspin_lock *lock;
2271 {
2272 return (InterlockedPopEntrySList(head));
2273 }
2274
2275 uint16_t
2276 ExQueryDepthSList(head)
2277 slist_header *head;
2278 {
2279 uint16_t depth;
2280
2281 mtx_lock_spin(&ntoskrnl_interlock);
2282 depth = head->slh_list.slh_depth;
2283 mtx_unlock_spin(&ntoskrnl_interlock);
2284
2285 return (depth);
2286 }
2287
2288 void
2289 KeInitializeSpinLock(lock)
2290 kspin_lock *lock;
2291 {
2292 *lock = 0;
2293 }
2294
2295 #ifdef __i386__
2296 void
2297 KefAcquireSpinLockAtDpcLevel(lock)
2298 kspin_lock *lock;
2299 {
2300 #ifdef NTOSKRNL_DEBUG_SPINLOCKS
2301 int i = 0;
2302 #endif
2303
2304 while (atomic_cmpset_acq_int((volatile u_int *)lock, 0, 1) == 0) {
2305 /* sit and spin */;
2306 #ifdef NTOSKRNL_DEBUG_SPINLOCKS
2307 i++;
2308 if (i > 200000000)
2309 panic("DEADLOCK!");
2310 #endif
2311 }
2312 }
2313
2314 void
2315 KefReleaseSpinLockFromDpcLevel(lock)
2316 kspin_lock *lock;
2317 {
2318 atomic_store_rel_int((volatile u_int *)lock, 0);
2319 }
2320
2321 uint8_t
2322 KeAcquireSpinLockRaiseToDpc(kspin_lock *lock)
2323 {
2324 uint8_t oldirql;
2325
2326 if (KeGetCurrentIrql() > DISPATCH_LEVEL)
2327 panic("IRQL_NOT_LESS_THAN_OR_EQUAL");
2328
2329 KeRaiseIrql(DISPATCH_LEVEL, &oldirql);
2330 KeAcquireSpinLockAtDpcLevel(lock);
2331
2332 return (oldirql);
2333 }
2334 #else
2335 void
2336 KeAcquireSpinLockAtDpcLevel(kspin_lock *lock)
2337 {
2338 while (atomic_cmpset_acq_int((volatile u_int *)lock, 0, 1) == 0)
2339 /* sit and spin */;
2340 }
2341
2342 void
2343 KeReleaseSpinLockFromDpcLevel(kspin_lock *lock)
2344 {
2345 atomic_store_rel_int((volatile u_int *)lock, 0);
2346 }
2347 #endif /* __i386__ */
2348
2349 uintptr_t
2350 InterlockedExchange(dst, val)
2351 volatile uint32_t *dst;
2352 uintptr_t val;
2353 {
2354 uintptr_t r;
2355
2356 mtx_lock_spin(&ntoskrnl_interlock);
2357 r = *dst;
2358 *dst = val;
2359 mtx_unlock_spin(&ntoskrnl_interlock);
2360
2361 return (r);
2362 }
2363
2364 static uint32_t
2365 InterlockedIncrement(addend)
2366 volatile uint32_t *addend;
2367 {
2368 atomic_add_long((volatile u_long *)addend, 1);
2369 return (*addend);
2370 }
2371
2372 static uint32_t
2373 InterlockedDecrement(addend)
2374 volatile uint32_t *addend;
2375 {
2376 atomic_subtract_long((volatile u_long *)addend, 1);
2377 return (*addend);
2378 }
2379
2380 static void
2381 ExInterlockedAddLargeStatistic(addend, inc)
2382 uint64_t *addend;
2383 uint32_t inc;
2384 {
2385 mtx_lock_spin(&ntoskrnl_interlock);
2386 *addend += inc;
2387 mtx_unlock_spin(&ntoskrnl_interlock);
2388 };
2389
2390 mdl *
2391 IoAllocateMdl(void *vaddr, uint32_t len, uint8_t secondarybuf,
2392 uint8_t chargequota, irp *iopkt)
2393 {
2394 mdl *m;
2395 int zone = 0;
2396
2397 if (MmSizeOfMdl(vaddr, len) > MDL_ZONE_SIZE)
2398 m = ExAllocatePoolWithTag(NonPagedPool,
2399 MmSizeOfMdl(vaddr, len), 0);
2400 else {
2401 m = uma_zalloc(mdl_zone, M_NOWAIT | M_ZERO);
2402 zone++;
2403 }
2404
2405 if (m == NULL)
2406 return (NULL);
2407
2408 MmInitializeMdl(m, vaddr, len);
2409
2410 /*
2411 * MmInitializMdl() clears the flags field, so we
2412 * have to set this here. If the MDL came from the
2413 * MDL UMA zone, tag it so we can release it to
2414 * the right place later.
2415 */
2416 if (zone)
2417 m->mdl_flags = MDL_ZONE_ALLOCED;
2418
2419 if (iopkt != NULL) {
2420 if (secondarybuf == TRUE) {
2421 mdl *last;
2422 last = iopkt->irp_mdl;
2423 while (last->mdl_next != NULL)
2424 last = last->mdl_next;
2425 last->mdl_next = m;
2426 } else {
2427 if (iopkt->irp_mdl != NULL)
2428 panic("leaking an MDL in IoAllocateMdl()");
2429 iopkt->irp_mdl = m;
2430 }
2431 }
2432
2433 return (m);
2434 }
2435
2436 void
2437 IoFreeMdl(m)
2438 mdl *m;
2439 {
2440 if (m == NULL)
2441 return;
2442
2443 if (m->mdl_flags & MDL_ZONE_ALLOCED)
2444 uma_zfree(mdl_zone, m);
2445 else
2446 ExFreePool(m);
2447 }
2448
2449 static void *
2450 MmAllocateContiguousMemory(size, highest)
2451 uint32_t size;
2452 uint64_t highest;
2453 {
2454 void *addr;
2455 size_t pagelength = roundup(size, PAGE_SIZE);
2456
2457 addr = ExAllocatePoolWithTag(NonPagedPool, pagelength, 0);
2458
2459 return (addr);
2460 }
2461
2462 static void *
2463 MmAllocateContiguousMemorySpecifyCache(size, lowest, highest,
2464 boundary, cachetype)
2465 uint32_t size;
2466 uint64_t lowest;
2467 uint64_t highest;
2468 uint64_t boundary;
2469 enum nt_caching_type cachetype;
2470 {
2471 vm_memattr_t memattr;
2472 void *ret;
2473
2474 switch (cachetype) {
2475 case MmNonCached:
2476 memattr = VM_MEMATTR_UNCACHEABLE;
2477 break;
2478 case MmWriteCombined:
2479 memattr = VM_MEMATTR_WRITE_COMBINING;
2480 break;
2481 case MmNonCachedUnordered:
2482 memattr = VM_MEMATTR_UNCACHEABLE;
2483 break;
2484 case MmCached:
2485 case MmHardwareCoherentCached:
2486 case MmUSWCCached:
2487 default:
2488 memattr = VM_MEMATTR_DEFAULT;
2489 break;
2490 }
2491
2492 ret = (void *)kmem_alloc_contig(kernel_arena, size, M_ZERO | M_NOWAIT,
2493 lowest, highest, PAGE_SIZE, boundary, memattr);
2494 if (ret != NULL)
2495 malloc_type_allocated(M_DEVBUF, round_page(size));
2496 return (ret);
2497 }
2498
2499 static void
2500 MmFreeContiguousMemory(base)
2501 void *base;
2502 {
2503 ExFreePool(base);
2504 }
2505
2506 static void
2507 MmFreeContiguousMemorySpecifyCache(base, size, cachetype)
2508 void *base;
2509 uint32_t size;
2510 enum nt_caching_type cachetype;
2511 {
2512 contigfree(base, size, M_DEVBUF);
2513 }
2514
2515 static uint32_t
2516 MmSizeOfMdl(vaddr, len)
2517 void *vaddr;
2518 size_t len;
2519 {
2520 uint32_t l;
2521
2522 l = sizeof(struct mdl) +
2523 (sizeof(vm_offset_t *) * SPAN_PAGES(vaddr, len));
2524
2525 return (l);
2526 }
2527
2528 /*
2529 * The Microsoft documentation says this routine fills in the
2530 * page array of an MDL with the _physical_ page addresses that
2531 * comprise the buffer, but we don't really want to do that here.
2532 * Instead, we just fill in the page array with the kernel virtual
2533 * addresses of the buffers.
2534 */
2535 void
2536 MmBuildMdlForNonPagedPool(m)
2537 mdl *m;
2538 {
2539 vm_offset_t *mdl_pages;
2540 int pagecnt, i;
2541
2542 pagecnt = SPAN_PAGES(m->mdl_byteoffset, m->mdl_bytecount);
2543
2544 if (pagecnt > (m->mdl_size - sizeof(mdl)) / sizeof(vm_offset_t *))
2545 panic("not enough pages in MDL to describe buffer");
2546
2547 mdl_pages = MmGetMdlPfnArray(m);
2548
2549 for (i = 0; i < pagecnt; i++)
2550 *mdl_pages = (vm_offset_t)m->mdl_startva + (i * PAGE_SIZE);
2551
2552 m->mdl_flags |= MDL_SOURCE_IS_NONPAGED_POOL;
2553 m->mdl_mappedsystemva = MmGetMdlVirtualAddress(m);
2554 }
2555
2556 static void *
2557 MmMapLockedPages(mdl *buf, uint8_t accessmode)
2558 {
2559 buf->mdl_flags |= MDL_MAPPED_TO_SYSTEM_VA;
2560 return (MmGetMdlVirtualAddress(buf));
2561 }
2562
2563 static void *
2564 MmMapLockedPagesSpecifyCache(mdl *buf, uint8_t accessmode, uint32_t cachetype,
2565 void *vaddr, uint32_t bugcheck, uint32_t prio)
2566 {
2567 return (MmMapLockedPages(buf, accessmode));
2568 }
2569
2570 static void
2571 MmUnmapLockedPages(vaddr, buf)
2572 void *vaddr;
2573 mdl *buf;
2574 {
2575 buf->mdl_flags &= ~MDL_MAPPED_TO_SYSTEM_VA;
2576 }
2577
2578 /*
2579 * This function has a problem in that it will break if you
2580 * compile this module without PAE and try to use it on a PAE
2581 * kernel. Unfortunately, there's no way around this at the
2582 * moment. It's slightly less broken that using pmap_kextract().
2583 * You'd think the virtual memory subsystem would help us out
2584 * here, but it doesn't.
2585 */
2586
2587 static uint64_t
2588 MmGetPhysicalAddress(void *base)
2589 {
2590 return (pmap_extract(kernel_map->pmap, (vm_offset_t)base));
2591 }
2592
2593 void *
2594 MmGetSystemRoutineAddress(ustr)
2595 unicode_string *ustr;
2596 {
2597 ansi_string astr;
2598
2599 if (RtlUnicodeStringToAnsiString(&astr, ustr, TRUE))
2600 return (NULL);
2601 return (ndis_get_routine_address(ntoskrnl_functbl, astr.as_buf));
2602 }
2603
2604 uint8_t
2605 MmIsAddressValid(vaddr)
2606 void *vaddr;
2607 {
2608 if (pmap_extract(kernel_map->pmap, (vm_offset_t)vaddr))
2609 return (TRUE);
2610
2611 return (FALSE);
2612 }
2613
2614 void *
2615 MmMapIoSpace(paddr, len, cachetype)
2616 uint64_t paddr;
2617 uint32_t len;
2618 uint32_t cachetype;
2619 {
2620 devclass_t nexus_class;
2621 device_t *nexus_devs, devp;
2622 int nexus_count = 0;
2623 device_t matching_dev = NULL;
2624 struct resource *res;
2625 int i;
2626 vm_offset_t v;
2627
2628 /* There will always be at least one nexus. */
2629
2630 nexus_class = devclass_find("nexus");
2631 devclass_get_devices(nexus_class, &nexus_devs, &nexus_count);
2632
2633 for (i = 0; i < nexus_count; i++) {
2634 devp = nexus_devs[i];
2635 matching_dev = ntoskrnl_finddev(devp, paddr, &res);
2636 if (matching_dev)
2637 break;
2638 }
2639
2640 free(nexus_devs, M_TEMP);
2641
2642 if (matching_dev == NULL)
2643 return (NULL);
2644
2645 v = (vm_offset_t)rman_get_virtual(res);
2646 if (paddr > rman_get_start(res))
2647 v += paddr - rman_get_start(res);
2648
2649 return ((void *)v);
2650 }
2651
2652 void
2653 MmUnmapIoSpace(vaddr, len)
2654 void *vaddr;
2655 size_t len;
2656 {
2657 }
2658
2659
2660 static device_t
2661 ntoskrnl_finddev(dev, paddr, res)
2662 device_t dev;
2663 uint64_t paddr;
2664 struct resource **res;
2665 {
2666 device_t *children = NULL;
2667 device_t matching_dev;
2668 int childcnt;
2669 struct resource *r;
2670 struct resource_list *rl;
2671 struct resource_list_entry *rle;
2672 uint32_t flags;
2673 int i;
2674
2675 /* We only want devices that have been successfully probed. */
2676
2677 if (device_is_alive(dev) == FALSE)
2678 return (NULL);
2679
2680 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
2681 if (rl != NULL) {
2682 STAILQ_FOREACH(rle, rl, link) {
2683 r = rle->res;
2684
2685 if (r == NULL)
2686 continue;
2687
2688 flags = rman_get_flags(r);
2689
2690 if (rle->type == SYS_RES_MEMORY &&
2691 paddr >= rman_get_start(r) &&
2692 paddr <= rman_get_end(r)) {
2693 if (!(flags & RF_ACTIVE))
2694 bus_activate_resource(dev,
2695 SYS_RES_MEMORY, 0, r);
2696 *res = r;
2697 return (dev);
2698 }
2699 }
2700 }
2701
2702 /*
2703 * If this device has children, do another
2704 * level of recursion to inspect them.
2705 */
2706
2707 device_get_children(dev, &children, &childcnt);
2708
2709 for (i = 0; i < childcnt; i++) {
2710 matching_dev = ntoskrnl_finddev(children[i], paddr, res);
2711 if (matching_dev != NULL) {
2712 free(children, M_TEMP);
2713 return (matching_dev);
2714 }
2715 }
2716
2717
2718 /* Won't somebody please think of the children! */
2719
2720 if (children != NULL)
2721 free(children, M_TEMP);
2722
2723 return (NULL);
2724 }
2725
2726 /*
2727 * Workitems are unlike DPCs, in that they run in a user-mode thread
2728 * context rather than at DISPATCH_LEVEL in kernel context. In our
2729 * case we run them in kernel context anyway.
2730 */
2731 static void
2732 ntoskrnl_workitem_thread(arg)
2733 void *arg;
2734 {
2735 kdpc_queue *kq;
2736 list_entry *l;
2737 io_workitem *iw;
2738 uint8_t irql;
2739
2740 kq = arg;
2741
2742 InitializeListHead(&kq->kq_disp);
2743 kq->kq_td = curthread;
2744 kq->kq_exit = 0;
2745 KeInitializeSpinLock(&kq->kq_lock);
2746 KeInitializeEvent(&kq->kq_proc, EVENT_TYPE_SYNC, FALSE);
2747
2748 while (1) {
2749 KeWaitForSingleObject(&kq->kq_proc, 0, 0, TRUE, NULL);
2750
2751 KeAcquireSpinLock(&kq->kq_lock, &irql);
2752
2753 if (kq->kq_exit) {
2754 kq->kq_exit = 0;
2755 KeReleaseSpinLock(&kq->kq_lock, irql);
2756 break;
2757 }
2758
2759 while (!IsListEmpty(&kq->kq_disp)) {
2760 l = RemoveHeadList(&kq->kq_disp);
2761 iw = CONTAINING_RECORD(l,
2762 io_workitem, iw_listentry);
2763 InitializeListHead((&iw->iw_listentry));
2764 if (iw->iw_func == NULL)
2765 continue;
2766 KeReleaseSpinLock(&kq->kq_lock, irql);
2767 MSCALL2(iw->iw_func, iw->iw_dobj, iw->iw_ctx);
2768 KeAcquireSpinLock(&kq->kq_lock, &irql);
2769 }
2770
2771 KeReleaseSpinLock(&kq->kq_lock, irql);
2772 }
2773
2774 kproc_exit(0);
2775 return; /* notreached */
2776 }
2777
2778 static ndis_status
2779 RtlCharToInteger(src, base, val)
2780 const char *src;
2781 uint32_t base;
2782 uint32_t *val;
2783 {
2784 int negative = 0;
2785 uint32_t res;
2786
2787 if (!src || !val)
2788 return (STATUS_ACCESS_VIOLATION);
2789 while (*src != '\0' && *src <= ' ')
2790 src++;
2791 if (*src == '+')
2792 src++;
2793 else if (*src == '-') {
2794 src++;
2795 negative = 1;
2796 }
2797 if (base == 0) {
2798 base = 10;
2799 if (*src == '0') {
2800 src++;
2801 if (*src == 'b') {
2802 base = 2;
2803 src++;
2804 } else if (*src == 'o') {
2805 base = 8;
2806 src++;
2807 } else if (*src == 'x') {
2808 base = 16;
2809 src++;
2810 }
2811 }
2812 } else if (!(base == 2 || base == 8 || base == 10 || base == 16))
2813 return (STATUS_INVALID_PARAMETER);
2814
2815 for (res = 0; *src; src++) {
2816 int v;
2817 if (isdigit(*src))
2818 v = *src - '0';
2819 else if (isxdigit(*src))
2820 v = tolower(*src) - 'a' + 10;
2821 else
2822 v = base;
2823 if (v >= base)
2824 return (STATUS_INVALID_PARAMETER);
2825 res = res * base + v;
2826 }
2827 *val = negative ? -res : res;
2828 return (STATUS_SUCCESS);
2829 }
2830
2831 static void
2832 ntoskrnl_destroy_workitem_threads(void)
2833 {
2834 kdpc_queue *kq;
2835 int i;
2836
2837 for (i = 0; i < WORKITEM_THREADS; i++) {
2838 kq = wq_queues + i;
2839 kq->kq_exit = 1;
2840 KeSetEvent(&kq->kq_proc, IO_NO_INCREMENT, FALSE);
2841 while (kq->kq_exit)
2842 tsleep(kq->kq_td->td_proc, PWAIT, "waitiw", hz/10);
2843 }
2844 }
2845
2846 io_workitem *
2847 IoAllocateWorkItem(dobj)
2848 device_object *dobj;
2849 {
2850 io_workitem *iw;
2851
2852 iw = uma_zalloc(iw_zone, M_NOWAIT);
2853 if (iw == NULL)
2854 return (NULL);
2855
2856 InitializeListHead(&iw->iw_listentry);
2857 iw->iw_dobj = dobj;
2858
2859 mtx_lock(&ntoskrnl_dispatchlock);
2860 iw->iw_idx = wq_idx;
2861 WORKIDX_INC(wq_idx);
2862 mtx_unlock(&ntoskrnl_dispatchlock);
2863
2864 return (iw);
2865 }
2866
2867 void
2868 IoFreeWorkItem(iw)
2869 io_workitem *iw;
2870 {
2871 uma_zfree(iw_zone, iw);
2872 }
2873
2874 void
2875 IoQueueWorkItem(iw, iw_func, qtype, ctx)
2876 io_workitem *iw;
2877 io_workitem_func iw_func;
2878 uint32_t qtype;
2879 void *ctx;
2880 {
2881 kdpc_queue *kq;
2882 list_entry *l;
2883 io_workitem *cur;
2884 uint8_t irql;
2885
2886 kq = wq_queues + iw->iw_idx;
2887
2888 KeAcquireSpinLock(&kq->kq_lock, &irql);
2889
2890 /*
2891 * Traverse the list and make sure this workitem hasn't
2892 * already been inserted. Queuing the same workitem
2893 * twice will hose the list but good.
2894 */
2895
2896 l = kq->kq_disp.nle_flink;
2897 while (l != &kq->kq_disp) {
2898 cur = CONTAINING_RECORD(l, io_workitem, iw_listentry);
2899 if (cur == iw) {
2900 /* Already queued -- do nothing. */
2901 KeReleaseSpinLock(&kq->kq_lock, irql);
2902 return;
2903 }
2904 l = l->nle_flink;
2905 }
2906
2907 iw->iw_func = iw_func;
2908 iw->iw_ctx = ctx;
2909
2910 InsertTailList((&kq->kq_disp), (&iw->iw_listentry));
2911 KeReleaseSpinLock(&kq->kq_lock, irql);
2912
2913 KeSetEvent(&kq->kq_proc, IO_NO_INCREMENT, FALSE);
2914 }
2915
2916 static void
2917 ntoskrnl_workitem(dobj, arg)
2918 device_object *dobj;
2919 void *arg;
2920 {
2921 io_workitem *iw;
2922 work_queue_item *w;
2923 work_item_func f;
2924
2925 iw = arg;
2926 w = (work_queue_item *)dobj;
2927 f = (work_item_func)w->wqi_func;
2928 uma_zfree(iw_zone, iw);
2929 MSCALL2(f, w, w->wqi_ctx);
2930 }
2931
2932 /*
2933 * The ExQueueWorkItem() API is deprecated in Windows XP. Microsoft
2934 * warns that it's unsafe and to use IoQueueWorkItem() instead. The
2935 * problem with ExQueueWorkItem() is that it can't guard against
2936 * the condition where a driver submits a job to the work queue and
2937 * is then unloaded before the job is able to run. IoQueueWorkItem()
2938 * acquires a reference to the device's device_object via the
2939 * object manager and retains it until after the job has completed,
2940 * which prevents the driver from being unloaded before the job
2941 * runs. (We don't currently support this behavior, though hopefully
2942 * that will change once the object manager API is fleshed out a bit.)
2943 *
2944 * Having said all that, the ExQueueWorkItem() API remains, because
2945 * there are still other parts of Windows that use it, including
2946 * NDIS itself: NdisScheduleWorkItem() calls ExQueueWorkItem().
2947 * We fake up the ExQueueWorkItem() API on top of our implementation
2948 * of IoQueueWorkItem(). Workitem thread #3 is reserved exclusively
2949 * for ExQueueWorkItem() jobs, and we pass a pointer to the work
2950 * queue item (provided by the caller) in to IoAllocateWorkItem()
2951 * instead of the device_object. We need to save this pointer so
2952 * we can apply a sanity check: as with the DPC queue and other
2953 * workitem queues, we can't allow the same work queue item to
2954 * be queued twice. If it's already pending, we silently return
2955 */
2956
2957 void
2958 ExQueueWorkItem(w, qtype)
2959 work_queue_item *w;
2960 uint32_t qtype;
2961 {
2962 io_workitem *iw;
2963 io_workitem_func iwf;
2964 kdpc_queue *kq;
2965 list_entry *l;
2966 io_workitem *cur;
2967 uint8_t irql;
2968
2969
2970 /*
2971 * We need to do a special sanity test to make sure
2972 * the ExQueueWorkItem() API isn't used to queue
2973 * the same workitem twice. Rather than checking the
2974 * io_workitem pointer itself, we test the attached
2975 * device object, which is really a pointer to the
2976 * legacy work queue item structure.
2977 */
2978
2979 kq = wq_queues + WORKITEM_LEGACY_THREAD;
2980 KeAcquireSpinLock(&kq->kq_lock, &irql);
2981 l = kq->kq_disp.nle_flink;
2982 while (l != &kq->kq_disp) {
2983 cur = CONTAINING_RECORD(l, io_workitem, iw_listentry);
2984 if (cur->iw_dobj == (device_object *)w) {
2985 /* Already queued -- do nothing. */
2986 KeReleaseSpinLock(&kq->kq_lock, irql);
2987 return;
2988 }
2989 l = l->nle_flink;
2990 }
2991 KeReleaseSpinLock(&kq->kq_lock, irql);
2992
2993 iw = IoAllocateWorkItem((device_object *)w);
2994 if (iw == NULL)
2995 return;
2996
2997 iw->iw_idx = WORKITEM_LEGACY_THREAD;
2998 iwf = (io_workitem_func)ntoskrnl_findwrap((funcptr)ntoskrnl_workitem);
2999 IoQueueWorkItem(iw, iwf, qtype, iw);
3000 }
3001
3002 static void
3003 RtlZeroMemory(dst, len)
3004 void *dst;
3005 size_t len;
3006 {
3007 bzero(dst, len);
3008 }
3009
3010 static void
3011 RtlSecureZeroMemory(dst, len)
3012 void *dst;
3013 size_t len;
3014 {
3015 memset(dst, 0, len);
3016 }
3017
3018 static void
3019 RtlFillMemory(void *dst, size_t len, uint8_t c)
3020 {
3021 memset(dst, c, len);
3022 }
3023
3024 static void
3025 RtlMoveMemory(dst, src, len)
3026 void *dst;
3027 const void *src;
3028 size_t len;
3029 {
3030 memmove(dst, src, len);
3031 }
3032
3033 static void
3034 RtlCopyMemory(dst, src, len)
3035 void *dst;
3036 const void *src;
3037 size_t len;
3038 {
3039 bcopy(src, dst, len);
3040 }
3041
3042 static size_t
3043 RtlCompareMemory(s1, s2, len)
3044 const void *s1;
3045 const void *s2;
3046 size_t len;
3047 {
3048 size_t i;
3049 uint8_t *m1, *m2;
3050
3051 m1 = __DECONST(char *, s1);
3052 m2 = __DECONST(char *, s2);
3053
3054 for (i = 0; i < len && m1[i] == m2[i]; i++);
3055 return (i);
3056 }
3057
3058 void
3059 RtlInitAnsiString(dst, src)
3060 ansi_string *dst;
3061 char *src;
3062 {
3063 ansi_string *a;
3064
3065 a = dst;
3066 if (a == NULL)
3067 return;
3068 if (src == NULL) {
3069 a->as_len = a->as_maxlen = 0;
3070 a->as_buf = NULL;
3071 } else {
3072 a->as_buf = src;
3073 a->as_len = a->as_maxlen = strlen(src);
3074 }
3075 }
3076
3077 void
3078 RtlInitUnicodeString(dst, src)
3079 unicode_string *dst;
3080 uint16_t *src;
3081 {
3082 unicode_string *u;
3083 int i;
3084
3085 u = dst;
3086 if (u == NULL)
3087 return;
3088 if (src == NULL) {
3089 u->us_len = u->us_maxlen = 0;
3090 u->us_buf = NULL;
3091 } else {
3092 i = 0;
3093 while(src[i] != 0)
3094 i++;
3095 u->us_buf = src;
3096 u->us_len = u->us_maxlen = i * 2;
3097 }
3098 }
3099
3100 ndis_status
3101 RtlUnicodeStringToInteger(ustr, base, val)
3102 unicode_string *ustr;
3103 uint32_t base;
3104 uint32_t *val;
3105 {
3106 uint16_t *uchr;
3107 int len, neg = 0;
3108 char abuf[64];
3109 char *astr;
3110
3111 uchr = ustr->us_buf;
3112 len = ustr->us_len;
3113 bzero(abuf, sizeof(abuf));
3114
3115 if ((char)((*uchr) & 0xFF) == '-') {
3116 neg = 1;
3117 uchr++;
3118 len -= 2;
3119 } else if ((char)((*uchr) & 0xFF) == '+') {
3120 neg = 0;
3121 uchr++;
3122 len -= 2;
3123 }
3124
3125 if (base == 0) {
3126 if ((char)((*uchr) & 0xFF) == 'b') {
3127 base = 2;
3128 uchr++;
3129 len -= 2;
3130 } else if ((char)((*uchr) & 0xFF) == 'o') {
3131 base = 8;
3132 uchr++;
3133 len -= 2;
3134 } else if ((char)((*uchr) & 0xFF) == 'x') {
3135 base = 16;
3136 uchr++;
3137 len -= 2;
3138 } else
3139 base = 10;
3140 }
3141
3142 astr = abuf;
3143 if (neg) {
3144 strcpy(astr, "-");
3145 astr++;
3146 }
3147
3148 ntoskrnl_unicode_to_ascii(uchr, astr, len);
3149 *val = strtoul(abuf, NULL, base);
3150
3151 return (STATUS_SUCCESS);
3152 }
3153
3154 void
3155 RtlFreeUnicodeString(ustr)
3156 unicode_string *ustr;
3157 {
3158 if (ustr->us_buf == NULL)
3159 return;
3160 ExFreePool(ustr->us_buf);
3161 ustr->us_buf = NULL;
3162 }
3163
3164 void
3165 RtlFreeAnsiString(astr)
3166 ansi_string *astr;
3167 {
3168 if (astr->as_buf == NULL)
3169 return;
3170 ExFreePool(astr->as_buf);
3171 astr->as_buf = NULL;
3172 }
3173
3174 static int
3175 atoi(str)
3176 const char *str;
3177 {
3178 return (int)strtol(str, (char **)NULL, 10);
3179 }
3180
3181 static long
3182 atol(str)
3183 const char *str;
3184 {
3185 return strtol(str, (char **)NULL, 10);
3186 }
3187
3188 static int
3189 rand(void)
3190 {
3191
3192 return (random() / 2 + 1);
3193 }
3194
3195 static void
3196 srand(unsigned int seed)
3197 {
3198
3199 srandom(seed);
3200 }
3201
3202 static uint8_t
3203 IoIsWdmVersionAvailable(uint8_t major, uint8_t minor)
3204 {
3205 if (major == WDM_MAJOR && minor == WDM_MINOR_WINXP)
3206 return (TRUE);
3207 return (FALSE);
3208 }
3209
3210 static int32_t
3211 IoOpenDeviceRegistryKey(struct device_object *devobj, uint32_t type,
3212 uint32_t mask, void **key)
3213 {
3214 return (NDIS_STATUS_INVALID_DEVICE_REQUEST);
3215 }
3216
3217 static ndis_status
3218 IoGetDeviceObjectPointer(name, reqaccess, fileobj, devobj)
3219 unicode_string *name;
3220 uint32_t reqaccess;
3221 void *fileobj;
3222 device_object *devobj;
3223 {
3224 return (STATUS_SUCCESS);
3225 }
3226
3227 static ndis_status
3228 IoGetDeviceProperty(devobj, regprop, buflen, prop, reslen)
3229 device_object *devobj;
3230 uint32_t regprop;
3231 uint32_t buflen;
3232 void *prop;
3233 uint32_t *reslen;
3234 {
3235 driver_object *drv;
3236 uint16_t **name;
3237
3238 drv = devobj->do_drvobj;
3239
3240 switch (regprop) {
3241 case DEVPROP_DRIVER_KEYNAME:
3242 name = prop;
3243 *name = drv->dro_drivername.us_buf;
3244 *reslen = drv->dro_drivername.us_len;
3245 break;
3246 default:
3247 return (STATUS_INVALID_PARAMETER_2);
3248 break;
3249 }
3250
3251 return (STATUS_SUCCESS);
3252 }
3253
3254 static void
3255 KeInitializeMutex(kmutex, level)
3256 kmutant *kmutex;
3257 uint32_t level;
3258 {
3259 InitializeListHead((&kmutex->km_header.dh_waitlisthead));
3260 kmutex->km_abandoned = FALSE;
3261 kmutex->km_apcdisable = 1;
3262 kmutex->km_header.dh_sigstate = 1;
3263 kmutex->km_header.dh_type = DISP_TYPE_MUTANT;
3264 kmutex->km_header.dh_size = sizeof(kmutant) / sizeof(uint32_t);
3265 kmutex->km_ownerthread = NULL;
3266 }
3267
3268 static uint32_t
3269 KeReleaseMutex(kmutant *kmutex, uint8_t kwait)
3270 {
3271 uint32_t prevstate;
3272
3273 mtx_lock(&ntoskrnl_dispatchlock);
3274 prevstate = kmutex->km_header.dh_sigstate;
3275 if (kmutex->km_ownerthread != curthread) {
3276 mtx_unlock(&ntoskrnl_dispatchlock);
3277 return (STATUS_MUTANT_NOT_OWNED);
3278 }
3279
3280 kmutex->km_header.dh_sigstate++;
3281 kmutex->km_abandoned = FALSE;
3282
3283 if (kmutex->km_header.dh_sigstate == 1) {
3284 kmutex->km_ownerthread = NULL;
3285 ntoskrnl_waittest(&kmutex->km_header, IO_NO_INCREMENT);
3286 }
3287
3288 mtx_unlock(&ntoskrnl_dispatchlock);
3289
3290 return (prevstate);
3291 }
3292
3293 static uint32_t
3294 KeReadStateMutex(kmutex)
3295 kmutant *kmutex;
3296 {
3297 return (kmutex->km_header.dh_sigstate);
3298 }
3299
3300 void
3301 KeInitializeEvent(nt_kevent *kevent, uint32_t type, uint8_t state)
3302 {
3303 InitializeListHead((&kevent->k_header.dh_waitlisthead));
3304 kevent->k_header.dh_sigstate = state;
3305 if (type == EVENT_TYPE_NOTIFY)
3306 kevent->k_header.dh_type = DISP_TYPE_NOTIFICATION_EVENT;
3307 else
3308 kevent->k_header.dh_type = DISP_TYPE_SYNCHRONIZATION_EVENT;
3309 kevent->k_header.dh_size = sizeof(nt_kevent) / sizeof(uint32_t);
3310 }
3311
3312 uint32_t
3313 KeResetEvent(kevent)
3314 nt_kevent *kevent;
3315 {
3316 uint32_t prevstate;
3317
3318 mtx_lock(&ntoskrnl_dispatchlock);
3319 prevstate = kevent->k_header.dh_sigstate;
3320 kevent->k_header.dh_sigstate = FALSE;
3321 mtx_unlock(&ntoskrnl_dispatchlock);
3322
3323 return (prevstate);
3324 }
3325
3326 uint32_t
3327 KeSetEvent(nt_kevent *kevent, uint32_t increment, uint8_t kwait)
3328 {
3329 uint32_t prevstate;
3330 wait_block *w;
3331 nt_dispatch_header *dh;
3332 struct thread *td;
3333 wb_ext *we;
3334
3335 mtx_lock(&ntoskrnl_dispatchlock);
3336 prevstate = kevent->k_header.dh_sigstate;
3337 dh = &kevent->k_header;
3338
3339 if (IsListEmpty(&dh->dh_waitlisthead))
3340 /*
3341 * If there's nobody in the waitlist, just set
3342 * the state to signalled.
3343 */
3344 dh->dh_sigstate = 1;
3345 else {
3346 /*
3347 * Get the first waiter. If this is a synchronization
3348 * event, just wake up that one thread (don't bother
3349 * setting the state to signalled since we're supposed
3350 * to automatically clear synchronization events anyway).
3351 *
3352 * If it's a notification event, or the first
3353 * waiter is doing a WAITTYPE_ALL wait, go through
3354 * the full wait satisfaction process.
3355 */
3356 w = CONTAINING_RECORD(dh->dh_waitlisthead.nle_flink,
3357 wait_block, wb_waitlist);
3358 we = w->wb_ext;
3359 td = we->we_td;
3360 if (kevent->k_header.dh_type == DISP_TYPE_NOTIFICATION_EVENT ||
3361 w->wb_waittype == WAITTYPE_ALL) {
3362 if (prevstate == 0) {
3363 dh->dh_sigstate = 1;
3364 ntoskrnl_waittest(dh, increment);
3365 }
3366 } else {
3367 w->wb_awakened |= TRUE;
3368 cv_broadcastpri(&we->we_cv,
3369 (w->wb_oldpri - (increment * 4)) > PRI_MIN_KERN ?
3370 w->wb_oldpri - (increment * 4) : PRI_MIN_KERN);
3371 }
3372 }
3373
3374 mtx_unlock(&ntoskrnl_dispatchlock);
3375
3376 return (prevstate);
3377 }
3378
3379 void
3380 KeClearEvent(kevent)
3381 nt_kevent *kevent;
3382 {
3383 kevent->k_header.dh_sigstate = FALSE;
3384 }
3385
3386 uint32_t
3387 KeReadStateEvent(kevent)
3388 nt_kevent *kevent;
3389 {
3390 return (kevent->k_header.dh_sigstate);
3391 }
3392
3393 /*
3394 * The object manager in Windows is responsible for managing
3395 * references and access to various types of objects, including
3396 * device_objects, events, threads, timers and so on. However,
3397 * there's a difference in the way objects are handled in user
3398 * mode versus kernel mode.
3399 *
3400 * In user mode (i.e. Win32 applications), all objects are
3401 * managed by the object manager. For example, when you create
3402 * a timer or event object, you actually end up with an
3403 * object_header (for the object manager's bookkeeping
3404 * purposes) and an object body (which contains the actual object
3405 * structure, e.g. ktimer, kevent, etc...). This allows Windows
3406 * to manage resource quotas and to enforce access restrictions
3407 * on basically every kind of system object handled by the kernel.
3408 *
3409 * However, in kernel mode, you only end up using the object
3410 * manager some of the time. For example, in a driver, you create
3411 * a timer object by simply allocating the memory for a ktimer
3412 * structure and initializing it with KeInitializeTimer(). Hence,
3413 * the timer has no object_header and no reference counting or
3414 * security/resource checks are done on it. The assumption in
3415 * this case is that if you're running in kernel mode, you know
3416 * what you're doing, and you're already at an elevated privilege
3417 * anyway.
3418 *
3419 * There are some exceptions to this. The two most important ones
3420 * for our purposes are device_objects and threads. We need to use
3421 * the object manager to do reference counting on device_objects,
3422 * and for threads, you can only get a pointer to a thread's
3423 * dispatch header by using ObReferenceObjectByHandle() on the
3424 * handle returned by PsCreateSystemThread().
3425 */
3426
3427 static ndis_status
3428 ObReferenceObjectByHandle(ndis_handle handle, uint32_t reqaccess, void *otype,
3429 uint8_t accessmode, void **object, void **handleinfo)
3430 {
3431 nt_objref *nr;
3432
3433 nr = malloc(sizeof(nt_objref), M_DEVBUF, M_NOWAIT|M_ZERO);
3434 if (nr == NULL)
3435 return (STATUS_INSUFFICIENT_RESOURCES);
3436
3437 InitializeListHead((&nr->no_dh.dh_waitlisthead));
3438 nr->no_obj = handle;
3439 nr->no_dh.dh_type = DISP_TYPE_THREAD;
3440 nr->no_dh.dh_sigstate = 0;
3441 nr->no_dh.dh_size = (uint8_t)(sizeof(struct thread) /
3442 sizeof(uint32_t));
3443 TAILQ_INSERT_TAIL(&ntoskrnl_reflist, nr, link);
3444 *object = nr;
3445
3446 return (STATUS_SUCCESS);
3447 }
3448
3449 static void
3450 ObfDereferenceObject(object)
3451 void *object;
3452 {
3453 nt_objref *nr;
3454
3455 nr = object;
3456 TAILQ_REMOVE(&ntoskrnl_reflist, nr, link);
3457 free(nr, M_DEVBUF);
3458 }
3459
3460 static uint32_t
3461 ZwClose(handle)
3462 ndis_handle handle;
3463 {
3464 return (STATUS_SUCCESS);
3465 }
3466
3467 static uint32_t
3468 WmiQueryTraceInformation(traceclass, traceinfo, infolen, reqlen, buf)
3469 uint32_t traceclass;
3470 void *traceinfo;
3471 uint32_t infolen;
3472 uint32_t reqlen;
3473 void *buf;
3474 {
3475 return (STATUS_NOT_FOUND);
3476 }
3477
3478 static uint32_t
3479 WmiTraceMessage(uint64_t loghandle, uint32_t messageflags,
3480 void *guid, uint16_t messagenum, ...)
3481 {
3482 return (STATUS_SUCCESS);
3483 }
3484
3485 static uint32_t
3486 IoWMIRegistrationControl(dobj, action)
3487 device_object *dobj;
3488 uint32_t action;
3489 {
3490 return (STATUS_SUCCESS);
3491 }
3492
3493 /*
3494 * This is here just in case the thread returns without calling
3495 * PsTerminateSystemThread().
3496 */
3497 static void
3498 ntoskrnl_thrfunc(arg)
3499 void *arg;
3500 {
3501 thread_context *thrctx;
3502 uint32_t (*tfunc)(void *);
3503 void *tctx;
3504 uint32_t rval;
3505
3506 thrctx = arg;
3507 tfunc = thrctx->tc_thrfunc;
3508 tctx = thrctx->tc_thrctx;
3509 free(thrctx, M_TEMP);
3510
3511 rval = MSCALL1(tfunc, tctx);
3512
3513 PsTerminateSystemThread(rval);
3514 return; /* notreached */
3515 }
3516
3517 static ndis_status
3518 PsCreateSystemThread(handle, reqaccess, objattrs, phandle,
3519 clientid, thrfunc, thrctx)
3520 ndis_handle *handle;
3521 uint32_t reqaccess;
3522 void *objattrs;
3523 ndis_handle phandle;
3524 void *clientid;
3525 void *thrfunc;
3526 void *thrctx;
3527 {
3528 int error;
3529 thread_context *tc;
3530 struct proc *p;
3531
3532 tc = malloc(sizeof(thread_context), M_TEMP, M_NOWAIT);
3533 if (tc == NULL)
3534 return (STATUS_INSUFFICIENT_RESOURCES);
3535
3536 tc->tc_thrctx = thrctx;
3537 tc->tc_thrfunc = thrfunc;
3538
3539 error = kproc_create(ntoskrnl_thrfunc, tc, &p,
3540 RFHIGHPID, NDIS_KSTACK_PAGES, "Windows Kthread %d", ntoskrnl_kth);
3541
3542 if (error) {
3543 free(tc, M_TEMP);
3544 return (STATUS_INSUFFICIENT_RESOURCES);
3545 }
3546
3547 *handle = p;
3548 ntoskrnl_kth++;
3549
3550 return (STATUS_SUCCESS);
3551 }
3552
3553 /*
3554 * In Windows, the exit of a thread is an event that you're allowed
3555 * to wait on, assuming you've obtained a reference to the thread using
3556 * ObReferenceObjectByHandle(). Unfortunately, the only way we can
3557 * simulate this behavior is to register each thread we create in a
3558 * reference list, and if someone holds a reference to us, we poke
3559 * them.
3560 */
3561 static ndis_status
3562 PsTerminateSystemThread(status)
3563 ndis_status status;
3564 {
3565 struct nt_objref *nr;
3566
3567 mtx_lock(&ntoskrnl_dispatchlock);
3568 TAILQ_FOREACH(nr, &ntoskrnl_reflist, link) {
3569 if (nr->no_obj != curthread->td_proc)
3570 continue;
3571 nr->no_dh.dh_sigstate = 1;
3572 ntoskrnl_waittest(&nr->no_dh, IO_NO_INCREMENT);
3573 break;
3574 }
3575 mtx_unlock(&ntoskrnl_dispatchlock);
3576
3577 ntoskrnl_kth--;
3578
3579 kproc_exit(0);
3580 return (0); /* notreached */
3581 }
3582
3583 static uint32_t
3584 DbgPrint(char *fmt, ...)
3585 {
3586 va_list ap;
3587
3588 if (bootverbose) {
3589 va_start(ap, fmt);
3590 vprintf(fmt, ap);
3591 va_end(ap);
3592 }
3593
3594 return (STATUS_SUCCESS);
3595 }
3596
3597 static void
3598 DbgBreakPoint(void)
3599 {
3600
3601 kdb_enter(KDB_WHY_NDIS, "DbgBreakPoint(): breakpoint");
3602 }
3603
3604 static void
3605 KeBugCheckEx(code, param1, param2, param3, param4)
3606 uint32_t code;
3607 u_long param1;
3608 u_long param2;
3609 u_long param3;
3610 u_long param4;
3611 {
3612 panic("KeBugCheckEx: STOP 0x%X", code);
3613 }
3614
3615 static void
3616 ntoskrnl_timercall(arg)
3617 void *arg;
3618 {
3619 ktimer *timer;
3620 struct timeval tv;
3621 kdpc *dpc;
3622
3623 mtx_lock(&ntoskrnl_dispatchlock);
3624
3625 timer = arg;
3626
3627 #ifdef NTOSKRNL_DEBUG_TIMERS
3628 ntoskrnl_timer_fires++;
3629 #endif
3630 ntoskrnl_remove_timer(timer);
3631
3632 /*
3633 * This should never happen, but complain
3634 * if it does.
3635 */
3636
3637 if (timer->k_header.dh_inserted == FALSE) {
3638 mtx_unlock(&ntoskrnl_dispatchlock);
3639 printf("NTOS: timer %p fired even though "
3640 "it was canceled\n", timer);
3641 return;
3642 }
3643
3644 /* Mark the timer as no longer being on the timer queue. */
3645
3646 timer->k_header.dh_inserted = FALSE;
3647
3648 /* Now signal the object and satisfy any waits on it. */
3649
3650 timer->k_header.dh_sigstate = 1;
3651 ntoskrnl_waittest(&timer->k_header, IO_NO_INCREMENT);
3652
3653 /*
3654 * If this is a periodic timer, re-arm it
3655 * so it will fire again. We do this before
3656 * calling any deferred procedure calls because
3657 * it's possible the DPC might cancel the timer,
3658 * in which case it would be wrong for us to
3659 * re-arm it again afterwards.
3660 */
3661
3662 if (timer->k_period) {
3663 tv.tv_sec = 0;
3664 tv.tv_usec = timer->k_period * 1000;
3665 timer->k_header.dh_inserted = TRUE;
3666 ntoskrnl_insert_timer(timer, tvtohz(&tv));
3667 #ifdef NTOSKRNL_DEBUG_TIMERS
3668 ntoskrnl_timer_reloads++;
3669 #endif
3670 }
3671
3672 dpc = timer->k_dpc;
3673
3674 mtx_unlock(&ntoskrnl_dispatchlock);
3675
3676 /* If there's a DPC associated with the timer, queue it up. */
3677
3678 if (dpc != NULL)
3679 KeInsertQueueDpc(dpc, NULL, NULL);
3680 }
3681
3682 #ifdef NTOSKRNL_DEBUG_TIMERS
3683 static int
3684 sysctl_show_timers(SYSCTL_HANDLER_ARGS)
3685 {
3686 int ret;
3687
3688 ret = 0;
3689 ntoskrnl_show_timers();
3690 return (sysctl_handle_int(oidp, &ret, 0, req));
3691 }
3692
3693 static void
3694 ntoskrnl_show_timers()
3695 {
3696 int i = 0;
3697 list_entry *l;
3698
3699 mtx_lock_spin(&ntoskrnl_calllock);
3700 l = ntoskrnl_calllist.nle_flink;
3701 while(l != &ntoskrnl_calllist) {
3702 i++;
3703 l = l->nle_flink;
3704 }
3705 mtx_unlock_spin(&ntoskrnl_calllock);
3706
3707 printf("\n");
3708 printf("%d timers available (out of %d)\n", i, NTOSKRNL_TIMEOUTS);
3709 printf("timer sets: %qu\n", ntoskrnl_timer_sets);
3710 printf("timer reloads: %qu\n", ntoskrnl_timer_reloads);
3711 printf("timer cancels: %qu\n", ntoskrnl_timer_cancels);
3712 printf("timer fires: %qu\n", ntoskrnl_timer_fires);
3713 printf("\n");
3714 }
3715 #endif
3716
3717 /*
3718 * Must be called with dispatcher lock held.
3719 */
3720
3721 static void
3722 ntoskrnl_insert_timer(timer, ticks)
3723 ktimer *timer;
3724 int ticks;
3725 {
3726 callout_entry *e;
3727 list_entry *l;
3728 struct callout *c;
3729
3730 /*
3731 * Try and allocate a timer.
3732 */
3733 mtx_lock_spin(&ntoskrnl_calllock);
3734 if (IsListEmpty(&ntoskrnl_calllist)) {
3735 mtx_unlock_spin(&ntoskrnl_calllock);
3736 #ifdef NTOSKRNL_DEBUG_TIMERS
3737 ntoskrnl_show_timers();
3738 #endif
3739 panic("out of timers!");
3740 }
3741 l = RemoveHeadList(&ntoskrnl_calllist);
3742 mtx_unlock_spin(&ntoskrnl_calllock);
3743
3744 e = CONTAINING_RECORD(l, callout_entry, ce_list);
3745 c = &e->ce_callout;
3746
3747 timer->k_callout = c;
3748
3749 callout_init(c, 1);
3750 callout_reset(c, ticks, ntoskrnl_timercall, timer);
3751 }
3752
3753 static void
3754 ntoskrnl_remove_timer(timer)
3755 ktimer *timer;
3756 {
3757 callout_entry *e;
3758
3759 e = (callout_entry *)timer->k_callout;
3760 callout_stop(timer->k_callout);
3761
3762 mtx_lock_spin(&ntoskrnl_calllock);
3763 InsertHeadList((&ntoskrnl_calllist), (&e->ce_list));
3764 mtx_unlock_spin(&ntoskrnl_calllock);
3765 }
3766
3767 void
3768 KeInitializeTimer(timer)
3769 ktimer *timer;
3770 {
3771 if (timer == NULL)
3772 return;
3773
3774 KeInitializeTimerEx(timer, EVENT_TYPE_NOTIFY);
3775 }
3776
3777 void
3778 KeInitializeTimerEx(timer, type)
3779 ktimer *timer;
3780 uint32_t type;
3781 {
3782 if (timer == NULL)
3783 return;
3784
3785 bzero((char *)timer, sizeof(ktimer));
3786 InitializeListHead((&timer->k_header.dh_waitlisthead));
3787 timer->k_header.dh_sigstate = FALSE;
3788 timer->k_header.dh_inserted = FALSE;
3789 if (type == EVENT_TYPE_NOTIFY)
3790 timer->k_header.dh_type = DISP_TYPE_NOTIFICATION_TIMER;
3791 else
3792 timer->k_header.dh_type = DISP_TYPE_SYNCHRONIZATION_TIMER;
3793 timer->k_header.dh_size = sizeof(ktimer) / sizeof(uint32_t);
3794 }
3795
3796 /*
3797 * DPC subsystem. A Windows Defered Procedure Call has the following
3798 * properties:
3799 * - It runs at DISPATCH_LEVEL.
3800 * - It can have one of 3 importance values that control when it
3801 * runs relative to other DPCs in the queue.
3802 * - On SMP systems, it can be set to run on a specific processor.
3803 * In order to satisfy the last property, we create a DPC thread for
3804 * each CPU in the system and bind it to that CPU. Each thread
3805 * maintains three queues with different importance levels, which
3806 * will be processed in order from lowest to highest.
3807 *
3808 * In Windows, interrupt handlers run as DPCs. (Not to be confused
3809 * with ISRs, which run in interrupt context and can preempt DPCs.)
3810 * ISRs are given the highest importance so that they'll take
3811 * precedence over timers and other things.
3812 */
3813
3814 static void
3815 ntoskrnl_dpc_thread(arg)
3816 void *arg;
3817 {
3818 kdpc_queue *kq;
3819 kdpc *d;
3820 list_entry *l;
3821 uint8_t irql;
3822
3823 kq = arg;
3824
3825 InitializeListHead(&kq->kq_disp);
3826 kq->kq_td = curthread;
3827 kq->kq_exit = 0;
3828 kq->kq_running = FALSE;
3829 KeInitializeSpinLock(&kq->kq_lock);
3830 KeInitializeEvent(&kq->kq_proc, EVENT_TYPE_SYNC, FALSE);
3831 KeInitializeEvent(&kq->kq_done, EVENT_TYPE_SYNC, FALSE);
3832
3833 /*
3834 * Elevate our priority. DPCs are used to run interrupt
3835 * handlers, and they should trigger as soon as possible
3836 * once scheduled by an ISR.
3837 */
3838
3839 thread_lock(curthread);
3840 #ifdef NTOSKRNL_MULTIPLE_DPCS
3841 sched_bind(curthread, kq->kq_cpu);
3842 #endif
3843 sched_prio(curthread, PRI_MIN_KERN);
3844 thread_unlock(curthread);
3845
3846 while (1) {
3847 KeWaitForSingleObject(&kq->kq_proc, 0, 0, TRUE, NULL);
3848
3849 KeAcquireSpinLock(&kq->kq_lock, &irql);
3850
3851 if (kq->kq_exit) {
3852 kq->kq_exit = 0;
3853 KeReleaseSpinLock(&kq->kq_lock, irql);
3854 break;
3855 }
3856
3857 kq->kq_running = TRUE;
3858
3859 while (!IsListEmpty(&kq->kq_disp)) {
3860 l = RemoveHeadList((&kq->kq_disp));
3861 d = CONTAINING_RECORD(l, kdpc, k_dpclistentry);
3862 InitializeListHead((&d->k_dpclistentry));
3863 KeReleaseSpinLockFromDpcLevel(&kq->kq_lock);
3864 MSCALL4(d->k_deferedfunc, d, d->k_deferredctx,
3865 d->k_sysarg1, d->k_sysarg2);
3866 KeAcquireSpinLockAtDpcLevel(&kq->kq_lock);
3867 }
3868
3869 kq->kq_running = FALSE;
3870
3871 KeReleaseSpinLock(&kq->kq_lock, irql);
3872
3873 KeSetEvent(&kq->kq_done, IO_NO_INCREMENT, FALSE);
3874 }
3875
3876 kproc_exit(0);
3877 return; /* notreached */
3878 }
3879
3880 static void
3881 ntoskrnl_destroy_dpc_threads(void)
3882 {
3883 kdpc_queue *kq;
3884 kdpc dpc;
3885 int i;
3886
3887 kq = kq_queues;
3888 #ifdef NTOSKRNL_MULTIPLE_DPCS
3889 for (i = 0; i < mp_ncpus; i++) {
3890 #else
3891 for (i = 0; i < 1; i++) {
3892 #endif
3893 kq += i;
3894
3895 kq->kq_exit = 1;
3896 KeInitializeDpc(&dpc, NULL, NULL);
3897 KeSetTargetProcessorDpc(&dpc, i);
3898 KeInsertQueueDpc(&dpc, NULL, NULL);
3899 while (kq->kq_exit)
3900 tsleep(kq->kq_td->td_proc, PWAIT, "dpcw", hz/10);
3901 }
3902 }
3903
3904 static uint8_t
3905 ntoskrnl_insert_dpc(head, dpc)
3906 list_entry *head;
3907 kdpc *dpc;
3908 {
3909 list_entry *l;
3910 kdpc *d;
3911
3912 l = head->nle_flink;
3913 while (l != head) {
3914 d = CONTAINING_RECORD(l, kdpc, k_dpclistentry);
3915 if (d == dpc)
3916 return (FALSE);
3917 l = l->nle_flink;
3918 }
3919
3920 if (dpc->k_importance == KDPC_IMPORTANCE_LOW)
3921 InsertTailList((head), (&dpc->k_dpclistentry));
3922 else
3923 InsertHeadList((head), (&dpc->k_dpclistentry));
3924
3925 return (TRUE);
3926 }
3927
3928 void
3929 KeInitializeDpc(dpc, dpcfunc, dpcctx)
3930 kdpc *dpc;
3931 void *dpcfunc;
3932 void *dpcctx;
3933 {
3934
3935 if (dpc == NULL)
3936 return;
3937
3938 dpc->k_deferedfunc = dpcfunc;
3939 dpc->k_deferredctx = dpcctx;
3940 dpc->k_num = KDPC_CPU_DEFAULT;
3941 dpc->k_importance = KDPC_IMPORTANCE_MEDIUM;
3942 InitializeListHead((&dpc->k_dpclistentry));
3943 }
3944
3945 uint8_t
3946 KeInsertQueueDpc(dpc, sysarg1, sysarg2)
3947 kdpc *dpc;
3948 void *sysarg1;
3949 void *sysarg2;
3950 {
3951 kdpc_queue *kq;
3952 uint8_t r;
3953 uint8_t irql;
3954
3955 if (dpc == NULL)
3956 return (FALSE);
3957
3958 kq = kq_queues;
3959
3960 #ifdef NTOSKRNL_MULTIPLE_DPCS
3961 KeRaiseIrql(DISPATCH_LEVEL, &irql);
3962
3963 /*
3964 * By default, the DPC is queued to run on the same CPU
3965 * that scheduled it.
3966 */
3967
3968 if (dpc->k_num == KDPC_CPU_DEFAULT)
3969 kq += curthread->td_oncpu;
3970 else
3971 kq += dpc->k_num;
3972 KeAcquireSpinLockAtDpcLevel(&kq->kq_lock);
3973 #else
3974 KeAcquireSpinLock(&kq->kq_lock, &irql);
3975 #endif
3976
3977 r = ntoskrnl_insert_dpc(&kq->kq_disp, dpc);
3978 if (r == TRUE) {
3979 dpc->k_sysarg1 = sysarg1;
3980 dpc->k_sysarg2 = sysarg2;
3981 }
3982 KeReleaseSpinLock(&kq->kq_lock, irql);
3983
3984 if (r == FALSE)
3985 return (r);
3986
3987 KeSetEvent(&kq->kq_proc, IO_NO_INCREMENT, FALSE);
3988
3989 return (r);
3990 }
3991
3992 uint8_t
3993 KeRemoveQueueDpc(dpc)
3994 kdpc *dpc;
3995 {
3996 kdpc_queue *kq;
3997 uint8_t irql;
3998
3999 if (dpc == NULL)
4000 return (FALSE);
4001
4002 #ifdef NTOSKRNL_MULTIPLE_DPCS
4003 KeRaiseIrql(DISPATCH_LEVEL, &irql);
4004
4005 kq = kq_queues + dpc->k_num;
4006
4007 KeAcquireSpinLockAtDpcLevel(&kq->kq_lock);
4008 #else
4009 kq = kq_queues;
4010 KeAcquireSpinLock(&kq->kq_lock, &irql);
4011 #endif
4012
4013 if (dpc->k_dpclistentry.nle_flink == &dpc->k_dpclistentry) {
4014 KeReleaseSpinLockFromDpcLevel(&kq->kq_lock);
4015 KeLowerIrql(irql);
4016 return (FALSE);
4017 }
4018
4019 RemoveEntryList((&dpc->k_dpclistentry));
4020 InitializeListHead((&dpc->k_dpclistentry));
4021
4022 KeReleaseSpinLock(&kq->kq_lock, irql);
4023
4024 return (TRUE);
4025 }
4026
4027 void
4028 KeSetImportanceDpc(dpc, imp)
4029 kdpc *dpc;
4030 uint32_t imp;
4031 {
4032 if (imp != KDPC_IMPORTANCE_LOW &&
4033 imp != KDPC_IMPORTANCE_MEDIUM &&
4034 imp != KDPC_IMPORTANCE_HIGH)
4035 return;
4036
4037 dpc->k_importance = (uint8_t)imp;
4038 }
4039
4040 void
4041 KeSetTargetProcessorDpc(kdpc *dpc, uint8_t cpu)
4042 {
4043 if (cpu > mp_ncpus)
4044 return;
4045
4046 dpc->k_num = cpu;
4047 }
4048
4049 void
4050 KeFlushQueuedDpcs(void)
4051 {
4052 kdpc_queue *kq;
4053 int i;
4054
4055 /*
4056 * Poke each DPC queue and wait
4057 * for them to drain.
4058 */
4059
4060 #ifdef NTOSKRNL_MULTIPLE_DPCS
4061 for (i = 0; i < mp_ncpus; i++) {
4062 #else
4063 for (i = 0; i < 1; i++) {
4064 #endif
4065 kq = kq_queues + i;
4066 KeSetEvent(&kq->kq_proc, IO_NO_INCREMENT, FALSE);
4067 KeWaitForSingleObject(&kq->kq_done, 0, 0, TRUE, NULL);
4068 }
4069 }
4070
4071 uint32_t
4072 KeGetCurrentProcessorNumber(void)
4073 {
4074 return ((uint32_t)curthread->td_oncpu);
4075 }
4076
4077 uint8_t
4078 KeSetTimerEx(timer, duetime, period, dpc)
4079 ktimer *timer;
4080 int64_t duetime;
4081 uint32_t period;
4082 kdpc *dpc;
4083 {
4084 struct timeval tv;
4085 uint64_t curtime;
4086 uint8_t pending;
4087
4088 if (timer == NULL)
4089 return (FALSE);
4090
4091 mtx_lock(&ntoskrnl_dispatchlock);
4092
4093 if (timer->k_header.dh_inserted == TRUE) {
4094 ntoskrnl_remove_timer(timer);
4095 #ifdef NTOSKRNL_DEBUG_TIMERS
4096 ntoskrnl_timer_cancels++;
4097 #endif
4098 timer->k_header.dh_inserted = FALSE;
4099 pending = TRUE;
4100 } else
4101 pending = FALSE;
4102
4103 timer->k_duetime = duetime;
4104 timer->k_period = period;
4105 timer->k_header.dh_sigstate = FALSE;
4106 timer->k_dpc = dpc;
4107
4108 if (duetime < 0) {
4109 tv.tv_sec = - (duetime) / 10000000;
4110 tv.tv_usec = (- (duetime) / 10) -
4111 (tv.tv_sec * 1000000);
4112 } else {
4113 ntoskrnl_time(&curtime);
4114 if (duetime < curtime)
4115 tv.tv_sec = tv.tv_usec = 0;
4116 else {
4117 tv.tv_sec = ((duetime) - curtime) / 10000000;
4118 tv.tv_usec = ((duetime) - curtime) / 10 -
4119 (tv.tv_sec * 1000000);
4120 }
4121 }
4122
4123 timer->k_header.dh_inserted = TRUE;
4124 ntoskrnl_insert_timer(timer, tvtohz(&tv));
4125 #ifdef NTOSKRNL_DEBUG_TIMERS
4126 ntoskrnl_timer_sets++;
4127 #endif
4128
4129 mtx_unlock(&ntoskrnl_dispatchlock);
4130
4131 return (pending);
4132 }
4133
4134 uint8_t
4135 KeSetTimer(timer, duetime, dpc)
4136 ktimer *timer;
4137 int64_t duetime;
4138 kdpc *dpc;
4139 {
4140 return (KeSetTimerEx(timer, duetime, 0, dpc));
4141 }
4142
4143 /*
4144 * The Windows DDK documentation seems to say that cancelling
4145 * a timer that has a DPC will result in the DPC also being
4146 * cancelled, but this isn't really the case.
4147 */
4148
4149 uint8_t
4150 KeCancelTimer(timer)
4151 ktimer *timer;
4152 {
4153 uint8_t pending;
4154
4155 if (timer == NULL)
4156 return (FALSE);
4157
4158 mtx_lock(&ntoskrnl_dispatchlock);
4159
4160 pending = timer->k_header.dh_inserted;
4161
4162 if (timer->k_header.dh_inserted == TRUE) {
4163 timer->k_header.dh_inserted = FALSE;
4164 ntoskrnl_remove_timer(timer);
4165 #ifdef NTOSKRNL_DEBUG_TIMERS
4166 ntoskrnl_timer_cancels++;
4167 #endif
4168 }
4169
4170 mtx_unlock(&ntoskrnl_dispatchlock);
4171
4172 return (pending);
4173 }
4174
4175 uint8_t
4176 KeReadStateTimer(timer)
4177 ktimer *timer;
4178 {
4179 return (timer->k_header.dh_sigstate);
4180 }
4181
4182 static int32_t
4183 KeDelayExecutionThread(uint8_t wait_mode, uint8_t alertable, int64_t *interval)
4184 {
4185 ktimer timer;
4186
4187 if (wait_mode != 0)
4188 panic("invalid wait_mode %d", wait_mode);
4189
4190 KeInitializeTimer(&timer);
4191 KeSetTimer(&timer, *interval, NULL);
4192 KeWaitForSingleObject(&timer, 0, 0, alertable, NULL);
4193
4194 return STATUS_SUCCESS;
4195 }
4196
4197 static uint64_t
4198 KeQueryInterruptTime(void)
4199 {
4200 int ticks;
4201 struct timeval tv;
4202
4203 getmicrouptime(&tv);
4204
4205 ticks = tvtohz(&tv);
4206
4207 return ticks * howmany(10000000, hz);
4208 }
4209
4210 static struct thread *
4211 KeGetCurrentThread(void)
4212 {
4213
4214 return curthread;
4215 }
4216
4217 static int32_t
4218 KeSetPriorityThread(td, pri)
4219 struct thread *td;
4220 int32_t pri;
4221 {
4222 int32_t old;
4223
4224 if (td == NULL)
4225 return LOW_REALTIME_PRIORITY;
4226
4227 if (td->td_priority <= PRI_MIN_KERN)
4228 old = HIGH_PRIORITY;
4229 else if (td->td_priority >= PRI_MAX_KERN)
4230 old = LOW_PRIORITY;
4231 else
4232 old = LOW_REALTIME_PRIORITY;
4233
4234 thread_lock(td);
4235 if (pri == HIGH_PRIORITY)
4236 sched_prio(td, PRI_MIN_KERN);
4237 if (pri == LOW_REALTIME_PRIORITY)
4238 sched_prio(td, PRI_MIN_KERN + (PRI_MAX_KERN - PRI_MIN_KERN) / 2);
4239 if (pri == LOW_PRIORITY)
4240 sched_prio(td, PRI_MAX_KERN);
4241 thread_unlock(td);
4242
4243 return old;
4244 }
4245
4246 static void
4247 dummy()
4248 {
4249 printf("ntoskrnl dummy called...\n");
4250 }
4251
4252
4253 image_patch_table ntoskrnl_functbl[] = {
4254 IMPORT_SFUNC(RtlZeroMemory, 2),
4255 IMPORT_SFUNC(RtlSecureZeroMemory, 2),
4256 IMPORT_SFUNC(RtlFillMemory, 3),
4257 IMPORT_SFUNC(RtlMoveMemory, 3),
4258 IMPORT_SFUNC(RtlCharToInteger, 3),
4259 IMPORT_SFUNC(RtlCopyMemory, 3),
4260 IMPORT_SFUNC(RtlCopyString, 2),
4261 IMPORT_SFUNC(RtlCompareMemory, 3),
4262 IMPORT_SFUNC(RtlEqualUnicodeString, 3),
4263 IMPORT_SFUNC(RtlCopyUnicodeString, 2),
4264 IMPORT_SFUNC(RtlUnicodeStringToAnsiString, 3),
4265 IMPORT_SFUNC(RtlAnsiStringToUnicodeString, 3),
4266 IMPORT_SFUNC(RtlInitAnsiString, 2),
4267 IMPORT_SFUNC_MAP(RtlInitString, RtlInitAnsiString, 2),
4268 IMPORT_SFUNC(RtlInitUnicodeString, 2),
4269 IMPORT_SFUNC(RtlFreeAnsiString, 1),
4270 IMPORT_SFUNC(RtlFreeUnicodeString, 1),
4271 IMPORT_SFUNC(RtlUnicodeStringToInteger, 3),
4272 IMPORT_CFUNC(sprintf, 0),
4273 IMPORT_CFUNC(vsprintf, 0),
4274 IMPORT_CFUNC_MAP(_snprintf, snprintf, 0),
4275 IMPORT_CFUNC_MAP(_vsnprintf, vsnprintf, 0),
4276 IMPORT_CFUNC(DbgPrint, 0),
4277 IMPORT_SFUNC(DbgBreakPoint, 0),
4278 IMPORT_SFUNC(KeBugCheckEx, 5),
4279 IMPORT_CFUNC(strncmp, 0),
4280 IMPORT_CFUNC(strcmp, 0),
4281 IMPORT_CFUNC_MAP(stricmp, strcasecmp, 0),
4282 IMPORT_CFUNC(strncpy, 0),
4283 IMPORT_CFUNC(strcpy, 0),
4284 IMPORT_CFUNC(strlen, 0),
4285 IMPORT_CFUNC_MAP(toupper, ntoskrnl_toupper, 0),
4286 IMPORT_CFUNC_MAP(tolower, ntoskrnl_tolower, 0),
4287 IMPORT_CFUNC_MAP(strstr, ntoskrnl_strstr, 0),
4288 IMPORT_CFUNC_MAP(strncat, ntoskrnl_strncat, 0),
4289 IMPORT_CFUNC_MAP(strchr, index, 0),
4290 IMPORT_CFUNC_MAP(strrchr, rindex, 0),
4291 IMPORT_CFUNC(memcpy, 0),
4292 IMPORT_CFUNC_MAP(memmove, ntoskrnl_memmove, 0),
4293 IMPORT_CFUNC_MAP(memset, ntoskrnl_memset, 0),
4294 IMPORT_CFUNC_MAP(memchr, ntoskrnl_memchr, 0),
4295 IMPORT_SFUNC(IoAllocateDriverObjectExtension, 4),
4296 IMPORT_SFUNC(IoGetDriverObjectExtension, 2),
4297 IMPORT_FFUNC(IofCallDriver, 2),
4298 IMPORT_FFUNC(IofCompleteRequest, 2),
4299 IMPORT_SFUNC(IoAcquireCancelSpinLock, 1),
4300 IMPORT_SFUNC(IoReleaseCancelSpinLock, 1),
4301 IMPORT_SFUNC(IoCancelIrp, 1),
4302 IMPORT_SFUNC(IoConnectInterrupt, 11),
4303 IMPORT_SFUNC(IoDisconnectInterrupt, 1),
4304 IMPORT_SFUNC(IoCreateDevice, 7),
4305 IMPORT_SFUNC(IoDeleteDevice, 1),
4306 IMPORT_SFUNC(IoGetAttachedDevice, 1),
4307 IMPORT_SFUNC(IoAttachDeviceToDeviceStack, 2),
4308 IMPORT_SFUNC(IoDetachDevice, 1),
4309 IMPORT_SFUNC(IoBuildSynchronousFsdRequest, 7),
4310 IMPORT_SFUNC(IoBuildAsynchronousFsdRequest, 6),
4311 IMPORT_SFUNC(IoBuildDeviceIoControlRequest, 9),
4312 IMPORT_SFUNC(IoAllocateIrp, 2),
4313 IMPORT_SFUNC(IoReuseIrp, 2),
4314 IMPORT_SFUNC(IoMakeAssociatedIrp, 2),
4315 IMPORT_SFUNC(IoFreeIrp, 1),
4316 IMPORT_SFUNC(IoInitializeIrp, 3),
4317 IMPORT_SFUNC(KeAcquireInterruptSpinLock, 1),
4318 IMPORT_SFUNC(KeReleaseInterruptSpinLock, 2),
4319 IMPORT_SFUNC(KeSynchronizeExecution, 3),
4320 IMPORT_SFUNC(KeWaitForSingleObject, 5),
4321 IMPORT_SFUNC(KeWaitForMultipleObjects, 8),
4322 IMPORT_SFUNC(_allmul, 4),
4323 IMPORT_SFUNC(_alldiv, 4),
4324 IMPORT_SFUNC(_allrem, 4),
4325 IMPORT_RFUNC(_allshr, 0),
4326 IMPORT_RFUNC(_allshl, 0),
4327 IMPORT_SFUNC(_aullmul, 4),
4328 IMPORT_SFUNC(_aulldiv, 4),
4329 IMPORT_SFUNC(_aullrem, 4),
4330 IMPORT_RFUNC(_aullshr, 0),
4331 IMPORT_RFUNC(_aullshl, 0),
4332 IMPORT_CFUNC(atoi, 0),
4333 IMPORT_CFUNC(atol, 0),
4334 IMPORT_CFUNC(rand, 0),
4335 IMPORT_CFUNC(srand, 0),
4336 IMPORT_SFUNC(WRITE_REGISTER_USHORT, 2),
4337 IMPORT_SFUNC(READ_REGISTER_USHORT, 1),
4338 IMPORT_SFUNC(WRITE_REGISTER_ULONG, 2),
4339 IMPORT_SFUNC(READ_REGISTER_ULONG, 1),
4340 IMPORT_SFUNC(READ_REGISTER_UCHAR, 1),
4341 IMPORT_SFUNC(WRITE_REGISTER_UCHAR, 2),
4342 IMPORT_SFUNC(ExInitializePagedLookasideList, 7),
4343 IMPORT_SFUNC(ExDeletePagedLookasideList, 1),
4344 IMPORT_SFUNC(ExInitializeNPagedLookasideList, 7),
4345 IMPORT_SFUNC(ExDeleteNPagedLookasideList, 1),
4346 IMPORT_FFUNC(InterlockedPopEntrySList, 1),
4347 IMPORT_FFUNC(InitializeSListHead, 1),
4348 IMPORT_FFUNC(InterlockedPushEntrySList, 2),
4349 IMPORT_SFUNC(ExQueryDepthSList, 1),
4350 IMPORT_FFUNC_MAP(ExpInterlockedPopEntrySList,
4351 InterlockedPopEntrySList, 1),
4352 IMPORT_FFUNC_MAP(ExpInterlockedPushEntrySList,
4353 InterlockedPushEntrySList, 2),
4354 IMPORT_FFUNC(ExInterlockedPopEntrySList, 2),
4355 IMPORT_FFUNC(ExInterlockedPushEntrySList, 3),
4356 IMPORT_SFUNC(ExAllocatePoolWithTag, 3),
4357 IMPORT_SFUNC(ExFreePoolWithTag, 2),
4358 IMPORT_SFUNC(ExFreePool, 1),
4359 #ifdef __i386__
4360 IMPORT_FFUNC(KefAcquireSpinLockAtDpcLevel, 1),
4361 IMPORT_FFUNC(KefReleaseSpinLockFromDpcLevel,1),
4362 IMPORT_FFUNC(KeAcquireSpinLockRaiseToDpc, 1),
4363 #else
4364 /*
4365 * For AMD64, we can get away with just mapping
4366 * KeAcquireSpinLockRaiseToDpc() directly to KfAcquireSpinLock()
4367 * because the calling conventions end up being the same.
4368 * On i386, we have to be careful because KfAcquireSpinLock()
4369 * is _fastcall but KeAcquireSpinLockRaiseToDpc() isn't.
4370 */
4371 IMPORT_SFUNC(KeAcquireSpinLockAtDpcLevel, 1),
4372 IMPORT_SFUNC(KeReleaseSpinLockFromDpcLevel, 1),
4373 IMPORT_SFUNC_MAP(KeAcquireSpinLockRaiseToDpc, KfAcquireSpinLock, 1),
4374 #endif
4375 IMPORT_SFUNC_MAP(KeReleaseSpinLock, KfReleaseSpinLock, 1),
4376 IMPORT_FFUNC(InterlockedIncrement, 1),
4377 IMPORT_FFUNC(InterlockedDecrement, 1),
4378 IMPORT_FFUNC(InterlockedExchange, 2),
4379 IMPORT_FFUNC(ExInterlockedAddLargeStatistic, 2),
4380 IMPORT_SFUNC(IoAllocateMdl, 5),
4381 IMPORT_SFUNC(IoFreeMdl, 1),
4382 IMPORT_SFUNC(MmAllocateContiguousMemory, 2 + 1),
4383 IMPORT_SFUNC(MmAllocateContiguousMemorySpecifyCache, 5 + 3),
4384 IMPORT_SFUNC(MmFreeContiguousMemory, 1),
4385 IMPORT_SFUNC(MmFreeContiguousMemorySpecifyCache, 3),
4386 IMPORT_SFUNC(MmSizeOfMdl, 1),
4387 IMPORT_SFUNC(MmMapLockedPages, 2),
4388 IMPORT_SFUNC(MmMapLockedPagesSpecifyCache, 6),
4389 IMPORT_SFUNC(MmUnmapLockedPages, 2),
4390 IMPORT_SFUNC(MmBuildMdlForNonPagedPool, 1),
4391 IMPORT_SFUNC(MmGetPhysicalAddress, 1),
4392 IMPORT_SFUNC(MmGetSystemRoutineAddress, 1),
4393 IMPORT_SFUNC(MmIsAddressValid, 1),
4394 IMPORT_SFUNC(MmMapIoSpace, 3 + 1),
4395 IMPORT_SFUNC(MmUnmapIoSpace, 2),
4396 IMPORT_SFUNC(KeInitializeSpinLock, 1),
4397 IMPORT_SFUNC(IoIsWdmVersionAvailable, 2),
4398 IMPORT_SFUNC(IoOpenDeviceRegistryKey, 4),
4399 IMPORT_SFUNC(IoGetDeviceObjectPointer, 4),
4400 IMPORT_SFUNC(IoGetDeviceProperty, 5),
4401 IMPORT_SFUNC(IoAllocateWorkItem, 1),
4402 IMPORT_SFUNC(IoFreeWorkItem, 1),
4403 IMPORT_SFUNC(IoQueueWorkItem, 4),
4404 IMPORT_SFUNC(ExQueueWorkItem, 2),
4405 IMPORT_SFUNC(ntoskrnl_workitem, 2),
4406 IMPORT_SFUNC(KeInitializeMutex, 2),
4407 IMPORT_SFUNC(KeReleaseMutex, 2),
4408 IMPORT_SFUNC(KeReadStateMutex, 1),
4409 IMPORT_SFUNC(KeInitializeEvent, 3),
4410 IMPORT_SFUNC(KeSetEvent, 3),
4411 IMPORT_SFUNC(KeResetEvent, 1),
4412 IMPORT_SFUNC(KeClearEvent, 1),
4413 IMPORT_SFUNC(KeReadStateEvent, 1),
4414 IMPORT_SFUNC(KeInitializeTimer, 1),
4415 IMPORT_SFUNC(KeInitializeTimerEx, 2),
4416 IMPORT_SFUNC(KeSetTimer, 3),
4417 IMPORT_SFUNC(KeSetTimerEx, 4),
4418 IMPORT_SFUNC(KeCancelTimer, 1),
4419 IMPORT_SFUNC(KeReadStateTimer, 1),
4420 IMPORT_SFUNC(KeInitializeDpc, 3),
4421 IMPORT_SFUNC(KeInsertQueueDpc, 3),
4422 IMPORT_SFUNC(KeRemoveQueueDpc, 1),
4423 IMPORT_SFUNC(KeSetImportanceDpc, 2),
4424 IMPORT_SFUNC(KeSetTargetProcessorDpc, 2),
4425 IMPORT_SFUNC(KeFlushQueuedDpcs, 0),
4426 IMPORT_SFUNC(KeGetCurrentProcessorNumber, 1),
4427 IMPORT_SFUNC(ObReferenceObjectByHandle, 6),
4428 IMPORT_FFUNC(ObfDereferenceObject, 1),
4429 IMPORT_SFUNC(ZwClose, 1),
4430 IMPORT_SFUNC(PsCreateSystemThread, 7),
4431 IMPORT_SFUNC(PsTerminateSystemThread, 1),
4432 IMPORT_SFUNC(IoWMIRegistrationControl, 2),
4433 IMPORT_SFUNC(WmiQueryTraceInformation, 5),
4434 IMPORT_CFUNC(WmiTraceMessage, 0),
4435 IMPORT_SFUNC(KeQuerySystemTime, 1),
4436 IMPORT_CFUNC(KeTickCount, 0),
4437 IMPORT_SFUNC(KeDelayExecutionThread, 3),
4438 IMPORT_SFUNC(KeQueryInterruptTime, 0),
4439 IMPORT_SFUNC(KeGetCurrentThread, 0),
4440 IMPORT_SFUNC(KeSetPriorityThread, 2),
4441
4442 /*
4443 * This last entry is a catch-all for any function we haven't
4444 * implemented yet. The PE import list patching routine will
4445 * use it for any function that doesn't have an explicit match
4446 * in this table.
4447 */
4448
4449 { NULL, (FUNC)dummy, NULL, 0, WINDRV_WRAP_STDCALL },
4450
4451 /* End of list. */
4452
4453 { NULL, NULL, NULL }
4454 };
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