1/*-
2 * Copyright (c) 2006 Roman Divacky
3 * 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 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2006 Roman Divacky
3 * 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 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
|
30__FBSDID("$FreeBSD: head/sys/compat/linux/linux_emul.c 191269 2009-04-19 13:48:42Z dchagin $");
| 30__FBSDID("$FreeBSD: head/sys/compat/linux/linux_emul.c 215664 2010-11-22 09:06:59Z netchild $");
|
31
32#include "opt_compat.h"
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/imgact.h>
37#include <sys/kernel.h>
38#include <sys/lock.h>
39#include <sys/malloc.h>
40#include <sys/mutex.h>
41#include <sys/sx.h>
42#include <sys/proc.h>
43#include <sys/syscallsubr.h>
44#include <sys/sysproto.h>
45#include <sys/unistd.h>
46
47#ifdef COMPAT_LINUX32
48#include <machine/../linux32/linux.h>
49#include <machine/../linux32/linux32_proto.h>
50#else
51#include <machine/../linux/linux.h>
52#include <machine/../linux/linux_proto.h>
53#endif
54
55#include <compat/linux/linux_emul.h>
56#include <compat/linux/linux_futex.h>
57
58struct sx emul_shared_lock;
59struct mtx emul_lock;
60
61/* this returns locked reference to the emuldata entry (if found) */
62struct linux_emuldata *
63em_find(struct proc *p, int locked)
64{
65 struct linux_emuldata *em;
66
67 if (locked == EMUL_DOLOCK)
68 EMUL_LOCK(&emul_lock);
69
70 em = p->p_emuldata;
71
72 if (em == NULL && locked == EMUL_DOLOCK)
73 EMUL_UNLOCK(&emul_lock);
74
75 return (em);
76}
77
78int
79linux_proc_init(struct thread *td, pid_t child, int flags)
80{
81 struct linux_emuldata *em, *p_em;
82 struct proc *p;
83
84 if (child != 0) {
85 /* non-exec call */
86 em = malloc(sizeof *em, M_LINUX, M_WAITOK | M_ZERO);
87 em->pid = child;
88 em->pdeath_signal = 0;
89 em->used_requeue = 0;
90 em->robust_futexes = NULL;
91 if (flags & LINUX_CLONE_THREAD) {
92 /* handled later in the code */
93 } else {
94 struct linux_emuldata_shared *s;
95
96 s = malloc(sizeof *s, M_LINUX, M_WAITOK | M_ZERO);
97 s->refs = 1;
98 s->group_pid = child;
99
100 LIST_INIT(&s->threads);
101 em->shared = s;
102 }
103 } else {
104 /* lookup the old one */
105 em = em_find(td->td_proc, EMUL_DOLOCK);
106 KASSERT(em != NULL, ("proc_init: emuldata not found in exec case.\n"));
107 }
108
109 em->child_clear_tid = NULL;
110 em->child_set_tid = NULL;
111
112 /*
113 * allocate the shared struct only in clone()/fork cases in the case
114 * of clone() td = calling proc and child = pid of the newly created
115 * proc
116 */
117 if (child != 0) {
118 if (flags & LINUX_CLONE_THREAD) {
119 /* lookup the parent */
120 /*
121 * we dont have to lock the p_em because
122 * its waiting for us in linux_clone so
123 * there is no chance of it changing the
124 * p_em->shared address
125 */
126 p_em = em_find(td->td_proc, EMUL_DONTLOCK);
127 KASSERT(p_em != NULL, ("proc_init: parent emuldata not found for CLONE_THREAD\n"));
128 em->shared = p_em->shared;
129 EMUL_SHARED_WLOCK(&emul_shared_lock);
130 em->shared->refs++;
131 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
132 } else {
133 /*
134 * handled earlier to avoid malloc(M_WAITOK) with
135 * rwlock held
136 */
137 }
138 }
139 if (child != 0) {
140 EMUL_SHARED_WLOCK(&emul_shared_lock);
141 LIST_INSERT_HEAD(&em->shared->threads, em, threads);
142 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
143
144 p = pfind(child);
145 KASSERT(p != NULL, ("process not found in proc_init\n"));
146 p->p_emuldata = em;
147 PROC_UNLOCK(p);
148 } else
149 EMUL_UNLOCK(&emul_lock);
150
151 return (0);
152}
153
154void
155linux_proc_exit(void *arg __unused, struct proc *p)
156{
157 struct linux_emuldata *em;
| 31
32#include "opt_compat.h"
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/imgact.h>
37#include <sys/kernel.h>
38#include <sys/lock.h>
39#include <sys/malloc.h>
40#include <sys/mutex.h>
41#include <sys/sx.h>
42#include <sys/proc.h>
43#include <sys/syscallsubr.h>
44#include <sys/sysproto.h>
45#include <sys/unistd.h>
46
47#ifdef COMPAT_LINUX32
48#include <machine/../linux32/linux.h>
49#include <machine/../linux32/linux32_proto.h>
50#else
51#include <machine/../linux/linux.h>
52#include <machine/../linux/linux_proto.h>
53#endif
54
55#include <compat/linux/linux_emul.h>
56#include <compat/linux/linux_futex.h>
57
58struct sx emul_shared_lock;
59struct mtx emul_lock;
60
61/* this returns locked reference to the emuldata entry (if found) */
62struct linux_emuldata *
63em_find(struct proc *p, int locked)
64{
65 struct linux_emuldata *em;
66
67 if (locked == EMUL_DOLOCK)
68 EMUL_LOCK(&emul_lock);
69
70 em = p->p_emuldata;
71
72 if (em == NULL && locked == EMUL_DOLOCK)
73 EMUL_UNLOCK(&emul_lock);
74
75 return (em);
76}
77
78int
79linux_proc_init(struct thread *td, pid_t child, int flags)
80{
81 struct linux_emuldata *em, *p_em;
82 struct proc *p;
83
84 if (child != 0) {
85 /* non-exec call */
86 em = malloc(sizeof *em, M_LINUX, M_WAITOK | M_ZERO);
87 em->pid = child;
88 em->pdeath_signal = 0;
89 em->used_requeue = 0;
90 em->robust_futexes = NULL;
91 if (flags & LINUX_CLONE_THREAD) {
92 /* handled later in the code */
93 } else {
94 struct linux_emuldata_shared *s;
95
96 s = malloc(sizeof *s, M_LINUX, M_WAITOK | M_ZERO);
97 s->refs = 1;
98 s->group_pid = child;
99
100 LIST_INIT(&s->threads);
101 em->shared = s;
102 }
103 } else {
104 /* lookup the old one */
105 em = em_find(td->td_proc, EMUL_DOLOCK);
106 KASSERT(em != NULL, ("proc_init: emuldata not found in exec case.\n"));
107 }
108
109 em->child_clear_tid = NULL;
110 em->child_set_tid = NULL;
111
112 /*
113 * allocate the shared struct only in clone()/fork cases in the case
114 * of clone() td = calling proc and child = pid of the newly created
115 * proc
116 */
117 if (child != 0) {
118 if (flags & LINUX_CLONE_THREAD) {
119 /* lookup the parent */
120 /*
121 * we dont have to lock the p_em because
122 * its waiting for us in linux_clone so
123 * there is no chance of it changing the
124 * p_em->shared address
125 */
126 p_em = em_find(td->td_proc, EMUL_DONTLOCK);
127 KASSERT(p_em != NULL, ("proc_init: parent emuldata not found for CLONE_THREAD\n"));
128 em->shared = p_em->shared;
129 EMUL_SHARED_WLOCK(&emul_shared_lock);
130 em->shared->refs++;
131 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
132 } else {
133 /*
134 * handled earlier to avoid malloc(M_WAITOK) with
135 * rwlock held
136 */
137 }
138 }
139 if (child != 0) {
140 EMUL_SHARED_WLOCK(&emul_shared_lock);
141 LIST_INSERT_HEAD(&em->shared->threads, em, threads);
142 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
143
144 p = pfind(child);
145 KASSERT(p != NULL, ("process not found in proc_init\n"));
146 p->p_emuldata = em;
147 PROC_UNLOCK(p);
148 } else
149 EMUL_UNLOCK(&emul_lock);
150
151 return (0);
152}
153
154void
155linux_proc_exit(void *arg __unused, struct proc *p)
156{
157 struct linux_emuldata *em;
|
158 int error;
| 158 int error, shared_flags, shared_xstat;
|
159 struct thread *td = FIRST_THREAD_IN_PROC(p);
160 int *child_clear_tid;
161 struct proc *q, *nq;
162
163 if (__predict_true(p->p_sysent != &elf_linux_sysvec))
164 return;
165
166 release_futexes(p);
167
168 /* find the emuldata */
169 em = em_find(p, EMUL_DOLOCK);
170
171 KASSERT(em != NULL, ("proc_exit: emuldata not found.\n"));
172
173 /* reparent all procs that are not a thread leader to initproc */
174 if (em->shared->group_pid != p->p_pid) {
175 child_clear_tid = em->child_clear_tid;
176 EMUL_UNLOCK(&emul_lock);
177 sx_xlock(&proctree_lock);
178 wakeup(initproc);
179 PROC_LOCK(p);
180 proc_reparent(p, initproc);
181 p->p_sigparent = SIGCHLD;
182 PROC_UNLOCK(p);
183 sx_xunlock(&proctree_lock);
184 } else {
185 child_clear_tid = em->child_clear_tid;
186 EMUL_UNLOCK(&emul_lock);
187 }
188
189 EMUL_SHARED_WLOCK(&emul_shared_lock);
| 159 struct thread *td = FIRST_THREAD_IN_PROC(p);
160 int *child_clear_tid;
161 struct proc *q, *nq;
162
163 if (__predict_true(p->p_sysent != &elf_linux_sysvec))
164 return;
165
166 release_futexes(p);
167
168 /* find the emuldata */
169 em = em_find(p, EMUL_DOLOCK);
170
171 KASSERT(em != NULL, ("proc_exit: emuldata not found.\n"));
172
173 /* reparent all procs that are not a thread leader to initproc */
174 if (em->shared->group_pid != p->p_pid) {
175 child_clear_tid = em->child_clear_tid;
176 EMUL_UNLOCK(&emul_lock);
177 sx_xlock(&proctree_lock);
178 wakeup(initproc);
179 PROC_LOCK(p);
180 proc_reparent(p, initproc);
181 p->p_sigparent = SIGCHLD;
182 PROC_UNLOCK(p);
183 sx_xunlock(&proctree_lock);
184 } else {
185 child_clear_tid = em->child_clear_tid;
186 EMUL_UNLOCK(&emul_lock);
187 }
188
189 EMUL_SHARED_WLOCK(&emul_shared_lock);
|
| 190 shared_flags = em->shared->flags;
191 shared_xstat = em->shared->xstat;
|
190 LIST_REMOVE(em, threads);
191
192 em->shared->refs--;
193 if (em->shared->refs == 0) {
194 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
195 free(em->shared, M_LINUX);
196 } else
197 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
198
| 192 LIST_REMOVE(em, threads);
193
194 em->shared->refs--;
195 if (em->shared->refs == 0) {
196 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
197 free(em->shared, M_LINUX);
198 } else
199 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
200
|
| 201 if ((shared_flags & EMUL_SHARED_HASXSTAT) != 0) {
202 PROC_LOCK(p);
203 p->p_xstat = shared_xstat;
204 PROC_UNLOCK(p);
205 }
206
|
199 if (child_clear_tid != NULL) {
200 struct linux_sys_futex_args cup;
201 int null = 0;
202
203 error = copyout(&null, child_clear_tid, sizeof(null));
204 if (error) {
205 free(em, M_LINUX);
206 return;
207 }
208
209 /* futexes stuff */
210 cup.uaddr = child_clear_tid;
211 cup.op = LINUX_FUTEX_WAKE;
212 cup.val = 0x7fffffff; /* Awake everyone */
213 cup.timeout = NULL;
214 cup.uaddr2 = NULL;
215 cup.val3 = 0;
216 error = linux_sys_futex(FIRST_THREAD_IN_PROC(p), &cup);
217 /*
218 * this cannot happen at the moment and if this happens it
219 * probably means there is a user space bug
220 */
221 if (error)
222 printf(LMSG("futex stuff in proc_exit failed.\n"));
223 }
224
225 /* clean the stuff up */
226 free(em, M_LINUX);
227
228 /* this is a little weird but rewritten from exit1() */
229 sx_xlock(&proctree_lock);
230 q = LIST_FIRST(&p->p_children);
231 for (; q != NULL; q = nq) {
232 nq = LIST_NEXT(q, p_sibling);
233 if (q->p_flag & P_WEXIT)
234 continue;
235 if (__predict_false(q->p_sysent != &elf_linux_sysvec))
236 continue;
237 em = em_find(q, EMUL_DOLOCK);
238 KASSERT(em != NULL, ("linux_reparent: emuldata not found: %i\n", q->p_pid));
239 PROC_LOCK(q);
240 if ((q->p_flag & P_WEXIT) == 0 && em->pdeath_signal != 0) {
241 psignal(q, em->pdeath_signal);
242 }
243 PROC_UNLOCK(q);
244 EMUL_UNLOCK(&emul_lock);
245 }
246 sx_xunlock(&proctree_lock);
247}
248
249/*
250 * This is used in a case of transition from FreeBSD binary execing to linux binary
251 * in this case we create linux emuldata proc entry with the pid of the currently running
252 * process.
253 */
254void
255linux_proc_exec(void *arg __unused, struct proc *p, struct image_params *imgp)
256{
257 if (__predict_false(imgp->sysent == &elf_linux_sysvec
258 && p->p_sysent != &elf_linux_sysvec))
259 linux_proc_init(FIRST_THREAD_IN_PROC(p), p->p_pid, 0);
| 207 if (child_clear_tid != NULL) {
208 struct linux_sys_futex_args cup;
209 int null = 0;
210
211 error = copyout(&null, child_clear_tid, sizeof(null));
212 if (error) {
213 free(em, M_LINUX);
214 return;
215 }
216
217 /* futexes stuff */
218 cup.uaddr = child_clear_tid;
219 cup.op = LINUX_FUTEX_WAKE;
220 cup.val = 0x7fffffff; /* Awake everyone */
221 cup.timeout = NULL;
222 cup.uaddr2 = NULL;
223 cup.val3 = 0;
224 error = linux_sys_futex(FIRST_THREAD_IN_PROC(p), &cup);
225 /*
226 * this cannot happen at the moment and if this happens it
227 * probably means there is a user space bug
228 */
229 if (error)
230 printf(LMSG("futex stuff in proc_exit failed.\n"));
231 }
232
233 /* clean the stuff up */
234 free(em, M_LINUX);
235
236 /* this is a little weird but rewritten from exit1() */
237 sx_xlock(&proctree_lock);
238 q = LIST_FIRST(&p->p_children);
239 for (; q != NULL; q = nq) {
240 nq = LIST_NEXT(q, p_sibling);
241 if (q->p_flag & P_WEXIT)
242 continue;
243 if (__predict_false(q->p_sysent != &elf_linux_sysvec))
244 continue;
245 em = em_find(q, EMUL_DOLOCK);
246 KASSERT(em != NULL, ("linux_reparent: emuldata not found: %i\n", q->p_pid));
247 PROC_LOCK(q);
248 if ((q->p_flag & P_WEXIT) == 0 && em->pdeath_signal != 0) {
249 psignal(q, em->pdeath_signal);
250 }
251 PROC_UNLOCK(q);
252 EMUL_UNLOCK(&emul_lock);
253 }
254 sx_xunlock(&proctree_lock);
255}
256
257/*
258 * This is used in a case of transition from FreeBSD binary execing to linux binary
259 * in this case we create linux emuldata proc entry with the pid of the currently running
260 * process.
261 */
262void
263linux_proc_exec(void *arg __unused, struct proc *p, struct image_params *imgp)
264{
265 if (__predict_false(imgp->sysent == &elf_linux_sysvec
266 && p->p_sysent != &elf_linux_sysvec))
267 linux_proc_init(FIRST_THREAD_IN_PROC(p), p->p_pid, 0);
|
| 268 if (__predict_false(p->p_sysent == &elf_linux_sysvec))
269 /* Kill threads regardless of imgp->sysent value */
270 linux_kill_threads(FIRST_THREAD_IN_PROC(p), SIGKILL);
|
260 if (__predict_false(imgp->sysent != &elf_linux_sysvec
261 && p->p_sysent == &elf_linux_sysvec)) {
262 struct linux_emuldata *em;
263
264 /*
265 * XXX:There's a race because here we assign p->p_emuldata NULL
266 * but the process is still counted as linux one for a short
267 * time so some other process might reference it and try to
268 * access its p->p_emuldata and panicing on a NULL reference.
269 */
270 em = em_find(p, EMUL_DONTLOCK);
271
272 KASSERT(em != NULL, ("proc_exec: emuldata not found.\n"));
273
274 EMUL_SHARED_WLOCK(&emul_shared_lock);
275 LIST_REMOVE(em, threads);
276
277 PROC_LOCK(p);
278 p->p_emuldata = NULL;
279 PROC_UNLOCK(p);
280
281 em->shared->refs--;
282 if (em->shared->refs == 0) {
283 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
284 free(em->shared, M_LINUX);
285 } else
286 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
287
288 free(em, M_LINUX);
289 }
290}
291
292void
293linux_schedtail(void *arg __unused, struct proc *p)
294{
295 struct linux_emuldata *em;
296 int error = 0;
297 int *child_set_tid;
298
299 if (__predict_true(p->p_sysent != &elf_linux_sysvec))
300 return;
301
302 /* find the emuldata */
303 em = em_find(p, EMUL_DOLOCK);
304
305 KASSERT(em != NULL, ("linux_schedtail: emuldata not found.\n"));
306 child_set_tid = em->child_set_tid;
307 EMUL_UNLOCK(&emul_lock);
308
309 if (child_set_tid != NULL)
310 error = copyout(&p->p_pid, (int *)child_set_tid,
311 sizeof(p->p_pid));
312
313 return;
314}
315
316int
317linux_set_tid_address(struct thread *td, struct linux_set_tid_address_args *args)
318{
319 struct linux_emuldata *em;
320
321#ifdef DEBUG
322 if (ldebug(set_tid_address))
323 printf(ARGS(set_tid_address, "%p"), args->tidptr);
324#endif
325
326 /* find the emuldata */
327 em = em_find(td->td_proc, EMUL_DOLOCK);
328
329 KASSERT(em != NULL, ("set_tid_address: emuldata not found.\n"));
330
331 em->child_clear_tid = args->tidptr;
332 td->td_retval[0] = td->td_proc->p_pid;
333
334 EMUL_UNLOCK(&emul_lock);
335 return 0;
336}
| 271 if (__predict_false(imgp->sysent != &elf_linux_sysvec
272 && p->p_sysent == &elf_linux_sysvec)) {
273 struct linux_emuldata *em;
274
275 /*
276 * XXX:There's a race because here we assign p->p_emuldata NULL
277 * but the process is still counted as linux one for a short
278 * time so some other process might reference it and try to
279 * access its p->p_emuldata and panicing on a NULL reference.
280 */
281 em = em_find(p, EMUL_DONTLOCK);
282
283 KASSERT(em != NULL, ("proc_exec: emuldata not found.\n"));
284
285 EMUL_SHARED_WLOCK(&emul_shared_lock);
286 LIST_REMOVE(em, threads);
287
288 PROC_LOCK(p);
289 p->p_emuldata = NULL;
290 PROC_UNLOCK(p);
291
292 em->shared->refs--;
293 if (em->shared->refs == 0) {
294 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
295 free(em->shared, M_LINUX);
296 } else
297 EMUL_SHARED_WUNLOCK(&emul_shared_lock);
298
299 free(em, M_LINUX);
300 }
301}
302
303void
304linux_schedtail(void *arg __unused, struct proc *p)
305{
306 struct linux_emuldata *em;
307 int error = 0;
308 int *child_set_tid;
309
310 if (__predict_true(p->p_sysent != &elf_linux_sysvec))
311 return;
312
313 /* find the emuldata */
314 em = em_find(p, EMUL_DOLOCK);
315
316 KASSERT(em != NULL, ("linux_schedtail: emuldata not found.\n"));
317 child_set_tid = em->child_set_tid;
318 EMUL_UNLOCK(&emul_lock);
319
320 if (child_set_tid != NULL)
321 error = copyout(&p->p_pid, (int *)child_set_tid,
322 sizeof(p->p_pid));
323
324 return;
325}
326
327int
328linux_set_tid_address(struct thread *td, struct linux_set_tid_address_args *args)
329{
330 struct linux_emuldata *em;
331
332#ifdef DEBUG
333 if (ldebug(set_tid_address))
334 printf(ARGS(set_tid_address, "%p"), args->tidptr);
335#endif
336
337 /* find the emuldata */
338 em = em_find(td->td_proc, EMUL_DOLOCK);
339
340 KASSERT(em != NULL, ("set_tid_address: emuldata not found.\n"));
341
342 em->child_clear_tid = args->tidptr;
343 td->td_retval[0] = td->td_proc->p_pid;
344
345 EMUL_UNLOCK(&emul_lock);
346 return 0;
347}
|
| 348
349void
350linux_kill_threads(struct thread *td, int sig)
351{
352 struct linux_emuldata *em, *td_em, *tmp_em;
353 struct proc *sp;
354
355 td_em = em_find(td->td_proc, EMUL_DONTLOCK);
356
357 KASSERT(td_em != NULL, ("linux_kill_threads: emuldata not found.\n"));
358
359 EMUL_SHARED_RLOCK(&emul_shared_lock);
360 LIST_FOREACH_SAFE(em, &td_em->shared->threads, threads, tmp_em) {
361 if (em->pid == td_em->pid)
362 continue;
363
364 sp = pfind(em->pid);
365 if ((sp->p_flag & P_WEXIT) == 0)
366 psignal(sp, sig);
367 PROC_UNLOCK(sp);
368#ifdef DEBUG
369 printf(LMSG("linux_kill_threads: kill PID %d\n"), em->pid);
370#endif
371 }
372 EMUL_SHARED_RUNLOCK(&emul_shared_lock);
373}
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