7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/types.h>
30 #include <sys/t_lock.h>
31 #include <sys/param.h>
32 #include <sys/cred.h>
33 #include <sys/debug.h>
34 #include <sys/inline.h>
35 #include <sys/kmem.h>
36 #include <sys/proc.h>
37 #include <sys/regset.h>
38 #include <sys/sysmacros.h>
39 #include <sys/systm.h>
40 #include <sys/prsystm.h>
41 #include <sys/buf.h>
42 #include <sys/signal.h>
43 #include <sys/user.h>
44 #include <sys/cpuvar.h>
45
46 #include <sys/fault.h>
47 #include <sys/syscall.h>
48 #include <sys/procfs.h>
294 /* cannot have write-only protection */
295 prot |= PROT_READ|PROT_WRITE;
296 #if 0 /* damned broken mmu feature! */
297 if (sum(pwp->wp_umap) == 0)
298 prot &= ~PROT_USER;
299 #endif
300 }
301 }
302
303
304 if (pwp->wp_oprot != 0) { /* if page exists */
305 struct seg *seg;
306 uint_t oprot;
307 int err, retrycnt = 0;
308
309 AS_LOCK_EXIT(as, &as->a_lock);
310 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER);
311 retry:
312 seg = as_segat(as, addr);
313 ASSERT(seg != NULL);
314 SEGOP_GETPROT(seg, addr, 0, &oprot);
315 if (prot != oprot) {
316 err = SEGOP_SETPROT(seg, addr, PAGESIZE, prot);
317 if (err == IE_RETRY) {
318 ASSERT(retrycnt == 0);
319 retrycnt++;
320 goto retry;
321 }
322 }
323 AS_LOCK_EXIT(as, &as->a_lock);
324 } else
325 AS_LOCK_EXIT(as, &as->a_lock);
326
327 /*
328 * When all pages are mapped back to their normal state,
329 * continue the other lwps.
330 */
331 if (!mapin) {
332 ASSERT(p->p_mapcnt > 0);
333 p->p_mapcnt--;
334 if (p->p_mapcnt == 0) {
335 mutex_exit(&p->p_maplock);
336 mutex_enter(&p->p_lock);
389 uint_t prot;
390 int err, retrycnt;
391
392 if (p->p_wprot == NULL)
393 return;
394
395 ASSERT(MUTEX_NOT_HELD(&curproc->p_lock));
396
397 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER);
398
399 pwp = p->p_wprot;
400 while (pwp != NULL) {
401
402 vaddr = pwp->wp_vaddr;
403 retrycnt = 0;
404 retry:
405 ASSERT(pwp->wp_flags & WP_SETPROT);
406 if ((seg = as_segat(as, vaddr)) != NULL &&
407 !(pwp->wp_flags & WP_NOWATCH)) {
408 prot = pwp->wp_prot;
409 err = SEGOP_SETPROT(seg, vaddr, PAGESIZE, prot);
410 if (err == IE_RETRY) {
411 ASSERT(retrycnt == 0);
412 retrycnt++;
413 goto retry;
414 }
415 }
416
417 next = pwp->wp_list;
418
419 if (pwp->wp_read + pwp->wp_write + pwp->wp_exec == 0) {
420 /*
421 * No watched areas remain in this page.
422 * Free the watched_page structure.
423 */
424 avl_remove(&as->a_wpage, pwp);
425 kmem_free(pwp, sizeof (struct watched_page));
426 } else {
427 pwp->wp_flags &= ~WP_SETPROT;
428 }
429
|
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <sys/t_lock.h>
29 #include <sys/param.h>
30 #include <sys/cred.h>
31 #include <sys/debug.h>
32 #include <sys/inline.h>
33 #include <sys/kmem.h>
34 #include <sys/proc.h>
35 #include <sys/regset.h>
36 #include <sys/sysmacros.h>
37 #include <sys/systm.h>
38 #include <sys/prsystm.h>
39 #include <sys/buf.h>
40 #include <sys/signal.h>
41 #include <sys/user.h>
42 #include <sys/cpuvar.h>
43
44 #include <sys/fault.h>
45 #include <sys/syscall.h>
46 #include <sys/procfs.h>
292 /* cannot have write-only protection */
293 prot |= PROT_READ|PROT_WRITE;
294 #if 0 /* damned broken mmu feature! */
295 if (sum(pwp->wp_umap) == 0)
296 prot &= ~PROT_USER;
297 #endif
298 }
299 }
300
301
302 if (pwp->wp_oprot != 0) { /* if page exists */
303 struct seg *seg;
304 uint_t oprot;
305 int err, retrycnt = 0;
306
307 AS_LOCK_EXIT(as, &as->a_lock);
308 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER);
309 retry:
310 seg = as_segat(as, addr);
311 ASSERT(seg != NULL);
312 (void) segop_getprot(seg, addr, 0, &oprot);
313 if (prot != oprot) {
314 err = segop_setprot(seg, addr, PAGESIZE, prot);
315 if (err == IE_RETRY) {
316 ASSERT(retrycnt == 0);
317 retrycnt++;
318 goto retry;
319 }
320 }
321 AS_LOCK_EXIT(as, &as->a_lock);
322 } else
323 AS_LOCK_EXIT(as, &as->a_lock);
324
325 /*
326 * When all pages are mapped back to their normal state,
327 * continue the other lwps.
328 */
329 if (!mapin) {
330 ASSERT(p->p_mapcnt > 0);
331 p->p_mapcnt--;
332 if (p->p_mapcnt == 0) {
333 mutex_exit(&p->p_maplock);
334 mutex_enter(&p->p_lock);
387 uint_t prot;
388 int err, retrycnt;
389
390 if (p->p_wprot == NULL)
391 return;
392
393 ASSERT(MUTEX_NOT_HELD(&curproc->p_lock));
394
395 AS_LOCK_ENTER(as, &as->a_lock, RW_WRITER);
396
397 pwp = p->p_wprot;
398 while (pwp != NULL) {
399
400 vaddr = pwp->wp_vaddr;
401 retrycnt = 0;
402 retry:
403 ASSERT(pwp->wp_flags & WP_SETPROT);
404 if ((seg = as_segat(as, vaddr)) != NULL &&
405 !(pwp->wp_flags & WP_NOWATCH)) {
406 prot = pwp->wp_prot;
407 err = segop_setprot(seg, vaddr, PAGESIZE, prot);
408 if (err == IE_RETRY) {
409 ASSERT(retrycnt == 0);
410 retrycnt++;
411 goto retry;
412 }
413 }
414
415 next = pwp->wp_list;
416
417 if (pwp->wp_read + pwp->wp_write + pwp->wp_exec == 0) {
418 /*
419 * No watched areas remain in this page.
420 * Free the watched_page structure.
421 */
422 avl_remove(&as->a_wpage, pwp);
423 kmem_free(pwp, sizeof (struct watched_page));
424 } else {
425 pwp->wp_flags &= ~WP_SETPROT;
426 }
427
|