1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2004 Tim J. Robbins
5 * Copyright (c) 2002 Doug Rabson
6 * Copyright (c) 2000 Marcel Moolenaar
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer
14 * in this position and unchanged.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include "opt_compat.h"
37
38 #include <sys/param.h>
39 #include <sys/capsicum.h>
40 #include <sys/clock.h>
41 #include <sys/fcntl.h>
42 #include <sys/file.h>
43 #include <sys/imgact.h>
44 #include <sys/kernel.h>
45 #include <sys/limits.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/mman.h>
49 #include <sys/mutex.h>
50 #include <sys/priv.h>
51 #include <sys/proc.h>
52 #include <sys/resource.h>
53 #include <sys/resourcevar.h>
54 #include <sys/syscallsubr.h>
55 #include <sys/sysproto.h>
56 #include <sys/systm.h>
57 #include <sys/unistd.h>
58 #include <sys/wait.h>
59
60 #include <machine/frame.h>
61 #include <machine/md_var.h>
62 #include <machine/pcb.h>
63 #include <machine/psl.h>
64 #include <machine/segments.h>
65 #include <machine/specialreg.h>
66 #include <x86/ifunc.h>
67
68 #include <vm/pmap.h>
69 #include <vm/vm.h>
70 #include <vm/vm_map.h>
71
72 #include <security/audit/audit.h>
73
74 #include <compat/freebsd32/freebsd32_util.h>
75 #include <amd64/linux32/linux.h>
76 #include <amd64/linux32/linux32_proto.h>
77 #include <compat/linux/linux_emul.h>
78 #include <compat/linux/linux_ipc.h>
79 #include <compat/linux/linux_misc.h>
80 #include <compat/linux/linux_mmap.h>
81 #include <compat/linux/linux_signal.h>
82 #include <compat/linux/linux_util.h>
83
84 static void bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru);
85
86 struct l_old_select_argv {
87 l_int nfds;
88 l_uintptr_t readfds;
89 l_uintptr_t writefds;
90 l_uintptr_t exceptfds;
91 l_uintptr_t timeout;
92 } __packed;
93
94
95 static void
96 bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru)
97 {
98
99 lru->ru_utime.tv_sec = ru->ru_utime.tv_sec;
100 lru->ru_utime.tv_usec = ru->ru_utime.tv_usec;
101 lru->ru_stime.tv_sec = ru->ru_stime.tv_sec;
102 lru->ru_stime.tv_usec = ru->ru_stime.tv_usec;
103 lru->ru_maxrss = ru->ru_maxrss;
104 lru->ru_ixrss = ru->ru_ixrss;
105 lru->ru_idrss = ru->ru_idrss;
106 lru->ru_isrss = ru->ru_isrss;
107 lru->ru_minflt = ru->ru_minflt;
108 lru->ru_majflt = ru->ru_majflt;
109 lru->ru_nswap = ru->ru_nswap;
110 lru->ru_inblock = ru->ru_inblock;
111 lru->ru_oublock = ru->ru_oublock;
112 lru->ru_msgsnd = ru->ru_msgsnd;
113 lru->ru_msgrcv = ru->ru_msgrcv;
114 lru->ru_nsignals = ru->ru_nsignals;
115 lru->ru_nvcsw = ru->ru_nvcsw;
116 lru->ru_nivcsw = ru->ru_nivcsw;
117 }
118
119 int
120 linux_copyout_rusage(struct rusage *ru, void *uaddr)
121 {
122 struct l_rusage lru;
123
124 bsd_to_linux_rusage(ru, &lru);
125
126 return (copyout(&lru, uaddr, sizeof(struct l_rusage)));
127 }
128
129 int
130 linux_execve(struct thread *td, struct linux_execve_args *args)
131 {
132 struct image_args eargs;
133 char *path;
134 int error;
135
136 LCONVPATHEXIST(td, args->path, &path);
137
138 error = freebsd32_exec_copyin_args(&eargs, path, UIO_SYSSPACE,
139 args->argp, args->envp);
140 free(path, M_TEMP);
141 if (error == 0)
142 error = linux_common_execve(td, &eargs);
143 AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
144 return (error);
145 }
146
147 CTASSERT(sizeof(struct l_iovec32) == 8);
148
149 int
150 linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt, struct uio **uiop)
151 {
152 struct l_iovec32 iov32;
153 struct iovec *iov;
154 struct uio *uio;
155 uint32_t iovlen;
156 int error, i;
157
158 *uiop = NULL;
159 if (iovcnt > UIO_MAXIOV)
160 return (EINVAL);
161 iovlen = iovcnt * sizeof(struct iovec);
162 uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK);
163 iov = (struct iovec *)(uio + 1);
164 for (i = 0; i < iovcnt; i++) {
165 error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32));
166 if (error) {
167 free(uio, M_IOV);
168 return (error);
169 }
170 iov[i].iov_base = PTRIN(iov32.iov_base);
171 iov[i].iov_len = iov32.iov_len;
172 }
173 uio->uio_iov = iov;
174 uio->uio_iovcnt = iovcnt;
175 uio->uio_segflg = UIO_USERSPACE;
176 uio->uio_offset = -1;
177 uio->uio_resid = 0;
178 for (i = 0; i < iovcnt; i++) {
179 if (iov->iov_len > INT_MAX - uio->uio_resid) {
180 free(uio, M_IOV);
181 return (EINVAL);
182 }
183 uio->uio_resid += iov->iov_len;
184 iov++;
185 }
186 *uiop = uio;
187 return (0);
188 }
189
190 int
191 linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt, struct iovec **iovp,
192 int error)
193 {
194 struct l_iovec32 iov32;
195 struct iovec *iov;
196 uint32_t iovlen;
197 int i;
198
199 *iovp = NULL;
200 if (iovcnt > UIO_MAXIOV)
201 return (error);
202 iovlen = iovcnt * sizeof(struct iovec);
203 iov = malloc(iovlen, M_IOV, M_WAITOK);
204 for (i = 0; i < iovcnt; i++) {
205 error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32));
206 if (error) {
207 free(iov, M_IOV);
208 return (error);
209 }
210 iov[i].iov_base = PTRIN(iov32.iov_base);
211 iov[i].iov_len = iov32.iov_len;
212 }
213 *iovp = iov;
214 return(0);
215
216 }
217
218 int
219 linux_readv(struct thread *td, struct linux_readv_args *uap)
220 {
221 struct uio *auio;
222 int error;
223
224 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
225 if (error)
226 return (error);
227 error = kern_readv(td, uap->fd, auio);
228 free(auio, M_IOV);
229 return (error);
230 }
231
232 int
233 linux_writev(struct thread *td, struct linux_writev_args *uap)
234 {
235 struct uio *auio;
236 int error;
237
238 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
239 if (error)
240 return (error);
241 error = kern_writev(td, uap->fd, auio);
242 free(auio, M_IOV);
243 return (error);
244 }
245
246 struct l_ipc_kludge {
247 l_uintptr_t msgp;
248 l_long msgtyp;
249 } __packed;
250
251 int
252 linux_ipc(struct thread *td, struct linux_ipc_args *args)
253 {
254
255 switch (args->what & 0xFFFF) {
256 case LINUX_SEMOP: {
257 struct linux_semop_args a;
258
259 a.semid = args->arg1;
260 a.tsops = PTRIN(args->ptr);
261 a.nsops = args->arg2;
262 return (linux_semop(td, &a));
263 }
264 case LINUX_SEMGET: {
265 struct linux_semget_args a;
266
267 a.key = args->arg1;
268 a.nsems = args->arg2;
269 a.semflg = args->arg3;
270 return (linux_semget(td, &a));
271 }
272 case LINUX_SEMCTL: {
273 struct linux_semctl_args a;
274 int error;
275
276 a.semid = args->arg1;
277 a.semnum = args->arg2;
278 a.cmd = args->arg3;
279 error = copyin(PTRIN(args->ptr), &a.arg, sizeof(a.arg));
280 if (error)
281 return (error);
282 return (linux_semctl(td, &a));
283 }
284 case LINUX_MSGSND: {
285 struct linux_msgsnd_args a;
286
287 a.msqid = args->arg1;
288 a.msgp = PTRIN(args->ptr);
289 a.msgsz = args->arg2;
290 a.msgflg = args->arg3;
291 return (linux_msgsnd(td, &a));
292 }
293 case LINUX_MSGRCV: {
294 struct linux_msgrcv_args a;
295
296 a.msqid = args->arg1;
297 a.msgsz = args->arg2;
298 a.msgflg = args->arg3;
299 if ((args->what >> 16) == 0) {
300 struct l_ipc_kludge tmp;
301 int error;
302
303 if (args->ptr == 0)
304 return (EINVAL);
305 error = copyin(PTRIN(args->ptr), &tmp, sizeof(tmp));
306 if (error)
307 return (error);
308 a.msgp = PTRIN(tmp.msgp);
309 a.msgtyp = tmp.msgtyp;
310 } else {
311 a.msgp = PTRIN(args->ptr);
312 a.msgtyp = args->arg5;
313 }
314 return (linux_msgrcv(td, &a));
315 }
316 case LINUX_MSGGET: {
317 struct linux_msgget_args a;
318
319 a.key = args->arg1;
320 a.msgflg = args->arg2;
321 return (linux_msgget(td, &a));
322 }
323 case LINUX_MSGCTL: {
324 struct linux_msgctl_args a;
325
326 a.msqid = args->arg1;
327 a.cmd = args->arg2;
328 a.buf = PTRIN(args->ptr);
329 return (linux_msgctl(td, &a));
330 }
331 case LINUX_SHMAT: {
332 struct linux_shmat_args a;
333 l_uintptr_t addr;
334 int error;
335
336 a.shmid = args->arg1;
337 a.shmaddr = PTRIN(args->ptr);
338 a.shmflg = args->arg2;
339 error = linux_shmat(td, &a);
340 if (error != 0)
341 return (error);
342 addr = td->td_retval[0];
343 error = copyout(&addr, PTRIN(args->arg3), sizeof(addr));
344 td->td_retval[0] = 0;
345 return (error);
346 }
347 case LINUX_SHMDT: {
348 struct linux_shmdt_args a;
349
350 a.shmaddr = PTRIN(args->ptr);
351 return (linux_shmdt(td, &a));
352 }
353 case LINUX_SHMGET: {
354 struct linux_shmget_args a;
355
356 a.key = args->arg1;
357 a.size = args->arg2;
358 a.shmflg = args->arg3;
359 return (linux_shmget(td, &a));
360 }
361 case LINUX_SHMCTL: {
362 struct linux_shmctl_args a;
363
364 a.shmid = args->arg1;
365 a.cmd = args->arg2;
366 a.buf = PTRIN(args->ptr);
367 return (linux_shmctl(td, &a));
368 }
369 default:
370 break;
371 }
372
373 return (EINVAL);
374 }
375
376 int
377 linux_old_select(struct thread *td, struct linux_old_select_args *args)
378 {
379 struct l_old_select_argv linux_args;
380 struct linux_select_args newsel;
381 int error;
382
383 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
384 if (error)
385 return (error);
386
387 newsel.nfds = linux_args.nfds;
388 newsel.readfds = PTRIN(linux_args.readfds);
389 newsel.writefds = PTRIN(linux_args.writefds);
390 newsel.exceptfds = PTRIN(linux_args.exceptfds);
391 newsel.timeout = PTRIN(linux_args.timeout);
392 return (linux_select(td, &newsel));
393 }
394
395 int
396 linux_set_cloned_tls(struct thread *td, void *desc)
397 {
398 struct user_segment_descriptor sd;
399 struct l_user_desc info;
400 struct pcb *pcb;
401 int error;
402 int a[2];
403
404 error = copyin(desc, &info, sizeof(struct l_user_desc));
405 if (error) {
406 linux_msg(td, "set_cloned_tls copyin info failed!");
407 } else {
408
409 /* We might copy out the entry_number as GUGS32_SEL. */
410 info.entry_number = GUGS32_SEL;
411 error = copyout(&info, desc, sizeof(struct l_user_desc));
412 if (error)
413 linux_msg(td, "set_cloned_tls copyout info failed!");
414
415 a[0] = LINUX_LDT_entry_a(&info);
416 a[1] = LINUX_LDT_entry_b(&info);
417
418 memcpy(&sd, &a, sizeof(a));
419 pcb = td->td_pcb;
420 pcb->pcb_gsbase = (register_t)info.base_addr;
421 td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL);
422 set_pcb_flags(pcb, PCB_32BIT);
423 }
424
425 return (error);
426 }
427
428 int
429 linux_set_upcall_kse(struct thread *td, register_t stack)
430 {
431
432 if (stack)
433 td->td_frame->tf_rsp = stack;
434
435 /*
436 * The newly created Linux thread returns
437 * to the user space by the same path that a parent do.
438 */
439 td->td_frame->tf_rax = 0;
440 return (0);
441 }
442
443 int
444 linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
445 {
446
447 return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot,
448 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
449 PAGE_SIZE));
450 }
451
452 int
453 linux_mmap(struct thread *td, struct linux_mmap_args *args)
454 {
455 int error;
456 struct l_mmap_argv linux_args;
457
458 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
459 if (error)
460 return (error);
461
462 return (linux_mmap_common(td, linux_args.addr, linux_args.len,
463 linux_args.prot, linux_args.flags, linux_args.fd,
464 (uint32_t)linux_args.pgoff));
465 }
466
467 int
468 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
469 {
470
471 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot));
472 }
473
474 int
475 linux_madvise(struct thread *td, struct linux_madvise_args *uap)
476 {
477
478 return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
479 }
480
481 int
482 linux_iopl(struct thread *td, struct linux_iopl_args *args)
483 {
484 int error;
485
486 if (args->level < 0 || args->level > 3)
487 return (EINVAL);
488 if ((error = priv_check(td, PRIV_IO)) != 0)
489 return (error);
490 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
491 return (error);
492 td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) |
493 (args->level * (PSL_IOPL / 3));
494
495 return (0);
496 }
497
498 int
499 linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
500 {
501 l_osigaction_t osa;
502 l_sigaction_t act, oact;
503 int error;
504
505 if (args->nsa != NULL) {
506 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
507 if (error)
508 return (error);
509 act.lsa_handler = osa.lsa_handler;
510 act.lsa_flags = osa.lsa_flags;
511 act.lsa_restorer = osa.lsa_restorer;
512 LINUX_SIGEMPTYSET(act.lsa_mask);
513 act.lsa_mask.__mask = osa.lsa_mask;
514 }
515
516 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
517 args->osa ? &oact : NULL);
518
519 if (args->osa != NULL && !error) {
520 osa.lsa_handler = oact.lsa_handler;
521 osa.lsa_flags = oact.lsa_flags;
522 osa.lsa_restorer = oact.lsa_restorer;
523 osa.lsa_mask = oact.lsa_mask.__mask;
524 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
525 }
526
527 return (error);
528 }
529
530 /*
531 * Linux has two extra args, restart and oldmask. We don't use these,
532 * but it seems that "restart" is actually a context pointer that
533 * enables the signal to happen with a different register set.
534 */
535 int
536 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
537 {
538 sigset_t sigmask;
539 l_sigset_t mask;
540
541 LINUX_SIGEMPTYSET(mask);
542 mask.__mask = args->mask;
543 linux_to_bsd_sigset(&mask, &sigmask);
544 return (kern_sigsuspend(td, sigmask));
545 }
546
547 int
548 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
549 {
550 l_sigset_t lmask;
551 sigset_t sigmask;
552 int error;
553
554 if (uap->sigsetsize != sizeof(l_sigset_t))
555 return (EINVAL);
556
557 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
558 if (error)
559 return (error);
560
561 linux_to_bsd_sigset(&lmask, &sigmask);
562 return (kern_sigsuspend(td, sigmask));
563 }
564
565 int
566 linux_pause(struct thread *td, struct linux_pause_args *args)
567 {
568 struct proc *p = td->td_proc;
569 sigset_t sigmask;
570
571 PROC_LOCK(p);
572 sigmask = td->td_sigmask;
573 PROC_UNLOCK(p);
574 return (kern_sigsuspend(td, sigmask));
575 }
576
577 int
578 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
579 {
580 stack_t ss, oss;
581 l_stack_t lss;
582 int error;
583
584 if (uap->uss != NULL) {
585 error = copyin(uap->uss, &lss, sizeof(l_stack_t));
586 if (error)
587 return (error);
588
589 ss.ss_sp = PTRIN(lss.ss_sp);
590 ss.ss_size = lss.ss_size;
591 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
592 }
593 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
594 (uap->uoss != NULL) ? &oss : NULL);
595 if (!error && uap->uoss != NULL) {
596 lss.ss_sp = PTROUT(oss.ss_sp);
597 lss.ss_size = oss.ss_size;
598 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
599 error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
600 }
601
602 return (error);
603 }
604
605 int
606 linux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap)
607 {
608 struct timeval atv;
609 l_timeval atv32;
610 struct timezone rtz;
611 int error = 0;
612
613 if (uap->tp) {
614 microtime(&atv);
615 atv32.tv_sec = atv.tv_sec;
616 atv32.tv_usec = atv.tv_usec;
617 error = copyout(&atv32, uap->tp, sizeof(atv32));
618 }
619 if (error == 0 && uap->tzp != NULL) {
620 rtz.tz_minuteswest = tz_minuteswest;
621 rtz.tz_dsttime = tz_dsttime;
622 error = copyout(&rtz, uap->tzp, sizeof(rtz));
623 }
624 return (error);
625 }
626
627 int
628 linux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap)
629 {
630 l_timeval atv32;
631 struct timeval atv, *tvp;
632 struct timezone atz, *tzp;
633 int error;
634
635 if (uap->tp) {
636 error = copyin(uap->tp, &atv32, sizeof(atv32));
637 if (error)
638 return (error);
639 atv.tv_sec = atv32.tv_sec;
640 atv.tv_usec = atv32.tv_usec;
641 tvp = &atv;
642 } else
643 tvp = NULL;
644 if (uap->tzp) {
645 error = copyin(uap->tzp, &atz, sizeof(atz));
646 if (error)
647 return (error);
648 tzp = &atz;
649 } else
650 tzp = NULL;
651 return (kern_settimeofday(td, tvp, tzp));
652 }
653
654 int
655 linux_getrusage(struct thread *td, struct linux_getrusage_args *uap)
656 {
657 struct rusage s;
658 int error;
659
660 error = kern_getrusage(td, uap->who, &s);
661 if (error != 0)
662 return (error);
663 if (uap->rusage != NULL)
664 error = linux_copyout_rusage(&s, uap->rusage);
665 return (error);
666 }
667
668 int
669 linux_set_thread_area(struct thread *td,
670 struct linux_set_thread_area_args *args)
671 {
672 struct l_user_desc info;
673 struct user_segment_descriptor sd;
674 struct pcb *pcb;
675 int a[2];
676 int error;
677
678 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
679 if (error)
680 return (error);
681
682 /*
683 * Semantics of Linux version: every thread in the system has array
684 * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown.
685 * This syscall loads one of the selected TLS decriptors with a value
686 * and also loads GDT descriptors 6, 7 and 8 with the content of
687 * the per-thread descriptors.
688 *
689 * Semantics of FreeBSD version: I think we can ignore that Linux has
690 * three per-thread descriptors and use just the first one.
691 * The tls_array[] is used only in [gs]et_thread_area() syscalls and
692 * for loading the GDT descriptors. We use just one GDT descriptor
693 * for TLS, so we will load just one.
694 *
695 * XXX: This doesn't work when a user space process tries to use more
696 * than one TLS segment. Comment in the Linux source says wine might
697 * do this.
698 */
699
700 /*
701 * GLIBC reads current %gs and call set_thread_area() with it.
702 * We should let GUDATA_SEL and GUGS32_SEL proceed as well because
703 * we use these segments.
704 */
705 switch (info.entry_number) {
706 case GUGS32_SEL:
707 case GUDATA_SEL:
708 case 6:
709 case -1:
710 info.entry_number = GUGS32_SEL;
711 break;
712 default:
713 return (EINVAL);
714 }
715
716 /*
717 * We have to copy out the GDT entry we use.
718 *
719 * XXX: What if a user space program does not check the return value
720 * and tries to use 6, 7 or 8?
721 */
722 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
723 if (error)
724 return (error);
725
726 if (LINUX_LDT_empty(&info)) {
727 a[0] = 0;
728 a[1] = 0;
729 } else {
730 a[0] = LINUX_LDT_entry_a(&info);
731 a[1] = LINUX_LDT_entry_b(&info);
732 }
733
734 memcpy(&sd, &a, sizeof(a));
735 pcb = td->td_pcb;
736 pcb->pcb_gsbase = (register_t)info.base_addr;
737 set_pcb_flags(pcb, PCB_32BIT);
738 update_gdt_gsbase(td, info.base_addr);
739
740 return (0);
741 }
742
743 int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
744 int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval);
745 DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *), static)
746 {
747
748 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
749 futex_xchgl_smap : futex_xchgl_nosmap);
750 }
751
752 int futex_addl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
753 int futex_addl_smap(int oparg, uint32_t *uaddr, int *oldval);
754 DEFINE_IFUNC(, int, futex_addl, (int, uint32_t *, int *), static)
755 {
756
757 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
758 futex_addl_smap : futex_addl_nosmap);
759 }
760
761 int futex_orl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
762 int futex_orl_smap(int oparg, uint32_t *uaddr, int *oldval);
763 DEFINE_IFUNC(, int, futex_orl, (int, uint32_t *, int *), static)
764 {
765
766 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
767 futex_orl_smap : futex_orl_nosmap);
768 }
769
770 int futex_andl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
771 int futex_andl_smap(int oparg, uint32_t *uaddr, int *oldval);
772 DEFINE_IFUNC(, int, futex_andl, (int, uint32_t *, int *), static)
773 {
774
775 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
776 futex_andl_smap : futex_andl_nosmap);
777 }
778
779 int futex_xorl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
780 int futex_xorl_smap(int oparg, uint32_t *uaddr, int *oldval);
781 DEFINE_IFUNC(, int, futex_xorl, (int, uint32_t *, int *), static)
782 {
783
784 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
785 futex_xorl_smap : futex_xorl_nosmap);
786 }
Cache object: 69c0b0722ee7f587641ec8c8b9526235
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