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 #include <sys/param.h>
35 #include <sys/fcntl.h>
36 #include <sys/imgact.h>
37 #include <sys/limits.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/priv.h>
42 #include <sys/proc.h>
43 #include <sys/reg.h>
44 #include <sys/syscallsubr.h>
45
46 #include <machine/frame.h>
47 #include <machine/md_var.h>
48 #include <machine/pcb.h>
49 #include <machine/psl.h>
50 #include <machine/segments.h>
51 #include <machine/specialreg.h>
52 #include <x86/ifunc.h>
53
54 #include <vm/pmap.h>
55 #include <vm/vm.h>
56 #include <vm/vm_map.h>
57
58 #include <security/audit/audit.h>
59
60 #include <compat/freebsd32/freebsd32_util.h>
61 #include <amd64/linux32/linux.h>
62 #include <amd64/linux32/linux32_proto.h>
63 #include <compat/linux/linux_emul.h>
64 #include <compat/linux/linux_fork.h>
65 #include <compat/linux/linux_ipc.h>
66 #include <compat/linux/linux_misc.h>
67 #include <compat/linux/linux_mmap.h>
68 #include <compat/linux/linux_signal.h>
69 #include <compat/linux/linux_util.h>
70
71 static void bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru);
72
73 struct l_old_select_argv {
74 l_int nfds;
75 l_uintptr_t readfds;
76 l_uintptr_t writefds;
77 l_uintptr_t exceptfds;
78 l_uintptr_t timeout;
79 } __packed;
80
81 static void
bsd_to_linux_rusage(struct rusage * ru,struct l_rusage * lru)82 bsd_to_linux_rusage(struct rusage *ru, struct l_rusage *lru)
83 {
84
85 lru->ru_utime.tv_sec = ru->ru_utime.tv_sec;
86 lru->ru_utime.tv_usec = ru->ru_utime.tv_usec;
87 lru->ru_stime.tv_sec = ru->ru_stime.tv_sec;
88 lru->ru_stime.tv_usec = ru->ru_stime.tv_usec;
89 lru->ru_maxrss = ru->ru_maxrss;
90 lru->ru_ixrss = ru->ru_ixrss;
91 lru->ru_idrss = ru->ru_idrss;
92 lru->ru_isrss = ru->ru_isrss;
93 lru->ru_minflt = ru->ru_minflt;
94 lru->ru_majflt = ru->ru_majflt;
95 lru->ru_nswap = ru->ru_nswap;
96 lru->ru_inblock = ru->ru_inblock;
97 lru->ru_oublock = ru->ru_oublock;
98 lru->ru_msgsnd = ru->ru_msgsnd;
99 lru->ru_msgrcv = ru->ru_msgrcv;
100 lru->ru_nsignals = ru->ru_nsignals;
101 lru->ru_nvcsw = ru->ru_nvcsw;
102 lru->ru_nivcsw = ru->ru_nivcsw;
103 }
104
105 int
linux_copyout_rusage(struct rusage * ru,void * uaddr)106 linux_copyout_rusage(struct rusage *ru, void *uaddr)
107 {
108 struct l_rusage lru;
109
110 bsd_to_linux_rusage(ru, &lru);
111
112 return (copyout(&lru, uaddr, sizeof(struct l_rusage)));
113 }
114
115 int
linux_execve(struct thread * td,struct linux_execve_args * args)116 linux_execve(struct thread *td, struct linux_execve_args *args)
117 {
118 struct image_args eargs;
119 char *path;
120 int error;
121
122 if (!LUSECONVPATH(td)) {
123 error = freebsd32_exec_copyin_args(&eargs, args->path, UIO_USERSPACE,
124 args->argp, args->envp);
125 } else {
126 LCONVPATHEXIST(args->path, &path);
127 error = freebsd32_exec_copyin_args(&eargs, path, UIO_SYSSPACE,
128 args->argp, args->envp);
129 LFREEPATH(path);
130 }
131 if (error == 0)
132 error = linux_common_execve(td, &eargs);
133 AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
134 return (error);
135 }
136
137 CTASSERT(sizeof(struct l_iovec32) == 8);
138
139 int
linux32_copyinuio(struct l_iovec32 * iovp,l_ulong iovcnt,struct uio ** uiop)140 linux32_copyinuio(struct l_iovec32 *iovp, l_ulong iovcnt, struct uio **uiop)
141 {
142 struct l_iovec32 iov32;
143 struct iovec *iov;
144 struct uio *uio;
145 uint32_t iovlen;
146 int error, i;
147
148 *uiop = NULL;
149 if (iovcnt > UIO_MAXIOV)
150 return (EINVAL);
151 iovlen = iovcnt * sizeof(struct iovec);
152 uio = malloc(iovlen + sizeof(*uio), M_IOV, M_WAITOK);
153 iov = (struct iovec *)(uio + 1);
154 for (i = 0; i < iovcnt; i++) {
155 error = copyin(&iovp[i], &iov32, sizeof(struct l_iovec32));
156 if (error) {
157 free(uio, M_IOV);
158 return (error);
159 }
160 iov[i].iov_base = PTRIN(iov32.iov_base);
161 iov[i].iov_len = iov32.iov_len;
162 }
163 uio->uio_iov = iov;
164 uio->uio_iovcnt = iovcnt;
165 uio->uio_segflg = UIO_USERSPACE;
166 uio->uio_offset = -1;
167 uio->uio_resid = 0;
168 for (i = 0; i < iovcnt; i++) {
169 if (iov->iov_len > INT_MAX - uio->uio_resid) {
170 free(uio, M_IOV);
171 return (EINVAL);
172 }
173 uio->uio_resid += iov->iov_len;
174 iov++;
175 }
176 *uiop = uio;
177 return (0);
178 }
179
180 int
linux32_copyiniov(struct l_iovec32 * iovp32,l_ulong iovcnt,struct iovec ** iovp,int error)181 linux32_copyiniov(struct l_iovec32 *iovp32, l_ulong iovcnt, struct iovec **iovp,
182 int error)
183 {
184 struct l_iovec32 iov32;
185 struct iovec *iov;
186 uint32_t iovlen;
187 int i;
188
189 *iovp = NULL;
190 if (iovcnt > UIO_MAXIOV)
191 return (error);
192 iovlen = iovcnt * sizeof(struct iovec);
193 iov = malloc(iovlen, M_IOV, M_WAITOK);
194 for (i = 0; i < iovcnt; i++) {
195 error = copyin(&iovp32[i], &iov32, sizeof(struct l_iovec32));
196 if (error) {
197 free(iov, M_IOV);
198 return (error);
199 }
200 iov[i].iov_base = PTRIN(iov32.iov_base);
201 iov[i].iov_len = iov32.iov_len;
202 }
203 *iovp = iov;
204 return(0);
205
206 }
207
208 int
linux_readv(struct thread * td,struct linux_readv_args * uap)209 linux_readv(struct thread *td, struct linux_readv_args *uap)
210 {
211 struct uio *auio;
212 int error;
213
214 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
215 if (error)
216 return (error);
217 error = kern_readv(td, uap->fd, auio);
218 free(auio, M_IOV);
219 return (error);
220 }
221
222 int
linux_writev(struct thread * td,struct linux_writev_args * uap)223 linux_writev(struct thread *td, struct linux_writev_args *uap)
224 {
225 struct uio *auio;
226 int error;
227
228 error = linux32_copyinuio(uap->iovp, uap->iovcnt, &auio);
229 if (error)
230 return (error);
231 error = kern_writev(td, uap->fd, auio);
232 free(auio, M_IOV);
233 return (error);
234 }
235
236 struct l_ipc_kludge {
237 l_uintptr_t msgp;
238 l_long msgtyp;
239 } __packed;
240
241 int
linux_ipc(struct thread * td,struct linux_ipc_args * args)242 linux_ipc(struct thread *td, struct linux_ipc_args *args)
243 {
244
245 switch (args->what & 0xFFFF) {
246 case LINUX_SEMOP: {
247
248 return (kern_semop(td, args->arg1, PTRIN(args->ptr),
249 args->arg2, NULL));
250 }
251 case LINUX_SEMGET: {
252 struct linux_semget_args a;
253
254 a.key = args->arg1;
255 a.nsems = args->arg2;
256 a.semflg = args->arg3;
257 return (linux_semget(td, &a));
258 }
259 case LINUX_SEMCTL: {
260 struct linux_semctl_args a;
261 int error;
262
263 a.semid = args->arg1;
264 a.semnum = args->arg2;
265 a.cmd = args->arg3;
266 error = copyin(PTRIN(args->ptr), &a.arg, sizeof(a.arg));
267 if (error)
268 return (error);
269 return (linux_semctl(td, &a));
270 }
271 case LINUX_SEMTIMEDOP: {
272 struct linux_semtimedop_args a;
273
274 a.semid = args->arg1;
275 a.tsops = PTRIN(args->ptr);
276 a.nsops = args->arg2;
277 a.timeout = PTRIN(args->arg5);
278 return (linux_semtimedop(td, &a));
279 }
280 case LINUX_MSGSND: {
281 struct linux_msgsnd_args a;
282
283 a.msqid = args->arg1;
284 a.msgp = PTRIN(args->ptr);
285 a.msgsz = args->arg2;
286 a.msgflg = args->arg3;
287 return (linux_msgsnd(td, &a));
288 }
289 case LINUX_MSGRCV: {
290 struct linux_msgrcv_args a;
291
292 a.msqid = args->arg1;
293 a.msgsz = args->arg2;
294 a.msgflg = args->arg3;
295 if ((args->what >> 16) == 0) {
296 struct l_ipc_kludge tmp;
297 int error;
298
299 if (args->ptr == 0)
300 return (EINVAL);
301 error = copyin(PTRIN(args->ptr), &tmp, sizeof(tmp));
302 if (error)
303 return (error);
304 a.msgp = PTRIN(tmp.msgp);
305 a.msgtyp = tmp.msgtyp;
306 } else {
307 a.msgp = PTRIN(args->ptr);
308 a.msgtyp = args->arg5;
309 }
310 return (linux_msgrcv(td, &a));
311 }
312 case LINUX_MSGGET: {
313 struct linux_msgget_args a;
314
315 a.key = args->arg1;
316 a.msgflg = args->arg2;
317 return (linux_msgget(td, &a));
318 }
319 case LINUX_MSGCTL: {
320 struct linux_msgctl_args a;
321
322 a.msqid = args->arg1;
323 a.cmd = args->arg2;
324 a.buf = PTRIN(args->ptr);
325 return (linux_msgctl(td, &a));
326 }
327 case LINUX_SHMAT: {
328 struct linux_shmat_args a;
329 l_uintptr_t addr;
330 int error;
331
332 a.shmid = args->arg1;
333 a.shmaddr = PTRIN(args->ptr);
334 a.shmflg = args->arg2;
335 error = linux_shmat(td, &a);
336 if (error != 0)
337 return (error);
338 addr = td->td_retval[0];
339 error = copyout(&addr, PTRIN(args->arg3), sizeof(addr));
340 td->td_retval[0] = 0;
341 return (error);
342 }
343 case LINUX_SHMDT: {
344 struct linux_shmdt_args a;
345
346 a.shmaddr = PTRIN(args->ptr);
347 return (linux_shmdt(td, &a));
348 }
349 case LINUX_SHMGET: {
350 struct linux_shmget_args a;
351
352 a.key = args->arg1;
353 a.size = args->arg2;
354 a.shmflg = args->arg3;
355 return (linux_shmget(td, &a));
356 }
357 case LINUX_SHMCTL: {
358 struct linux_shmctl_args a;
359
360 a.shmid = args->arg1;
361 a.cmd = args->arg2;
362 a.buf = PTRIN(args->ptr);
363 return (linux_shmctl(td, &a));
364 }
365 default:
366 break;
367 }
368
369 return (EINVAL);
370 }
371
372 int
linux_old_select(struct thread * td,struct linux_old_select_args * args)373 linux_old_select(struct thread *td, struct linux_old_select_args *args)
374 {
375 struct l_old_select_argv linux_args;
376 struct linux_select_args newsel;
377 int error;
378
379 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
380 if (error)
381 return (error);
382
383 newsel.nfds = linux_args.nfds;
384 newsel.readfds = PTRIN(linux_args.readfds);
385 newsel.writefds = PTRIN(linux_args.writefds);
386 newsel.exceptfds = PTRIN(linux_args.exceptfds);
387 newsel.timeout = PTRIN(linux_args.timeout);
388 return (linux_select(td, &newsel));
389 }
390
391 int
linux_set_cloned_tls(struct thread * td,void * desc)392 linux_set_cloned_tls(struct thread *td, void *desc)
393 {
394 struct l_user_desc info;
395 struct pcb *pcb;
396 int error;
397
398 error = copyin(desc, &info, sizeof(struct l_user_desc));
399 if (error) {
400 linux_msg(td, "set_cloned_tls copyin info failed!");
401 } else {
402 /* We might copy out the entry_number as GUGS32_SEL. */
403 info.entry_number = GUGS32_SEL;
404 error = copyout(&info, desc, sizeof(struct l_user_desc));
405 if (error)
406 linux_msg(td, "set_cloned_tls copyout info failed!");
407
408 pcb = td->td_pcb;
409 update_pcb_bases(pcb);
410 pcb->pcb_gsbase = (register_t)info.base_addr;
411 td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL);
412 }
413
414 return (error);
415 }
416
417 int
linux_set_upcall(struct thread * td,register_t stack)418 linux_set_upcall(struct thread *td, register_t stack)
419 {
420
421 if (stack)
422 td->td_frame->tf_rsp = stack;
423
424 /*
425 * The newly created Linux thread returns
426 * to the user space by the same path that a parent do.
427 */
428 td->td_frame->tf_rax = 0;
429 return (0);
430 }
431
432 int
linux_mmap2(struct thread * td,struct linux_mmap2_args * args)433 linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
434 {
435
436 return (linux_mmap_common(td, PTROUT(args->addr), args->len, args->prot,
437 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
438 PAGE_SIZE));
439 }
440
441 int
linux_mmap(struct thread * td,struct linux_mmap_args * args)442 linux_mmap(struct thread *td, struct linux_mmap_args *args)
443 {
444 int error;
445 struct l_mmap_argv linux_args;
446
447 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
448 if (error)
449 return (error);
450
451 return (linux_mmap_common(td, linux_args.addr, linux_args.len,
452 linux_args.prot, linux_args.flags, linux_args.fd,
453 (uint32_t)linux_args.pgoff));
454 }
455
456 int
linux_mprotect(struct thread * td,struct linux_mprotect_args * uap)457 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
458 {
459
460 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot));
461 }
462
463 int
linux_madvise(struct thread * td,struct linux_madvise_args * uap)464 linux_madvise(struct thread *td, struct linux_madvise_args *uap)
465 {
466
467 return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
468 }
469
470 int
linux_iopl(struct thread * td,struct linux_iopl_args * args)471 linux_iopl(struct thread *td, struct linux_iopl_args *args)
472 {
473 int error;
474
475 if (args->level < 0 || args->level > 3)
476 return (EINVAL);
477 if ((error = priv_check(td, PRIV_IO)) != 0)
478 return (error);
479 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
480 return (error);
481 td->td_frame->tf_rflags = (td->td_frame->tf_rflags & ~PSL_IOPL) |
482 (args->level * (PSL_IOPL / 3));
483
484 return (0);
485 }
486
487 int
linux_sigaction(struct thread * td,struct linux_sigaction_args * args)488 linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
489 {
490 l_osigaction_t osa;
491 l_sigaction_t act, oact;
492 int error;
493
494 if (args->nsa != NULL) {
495 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
496 if (error)
497 return (error);
498 act.lsa_handler = osa.lsa_handler;
499 act.lsa_flags = osa.lsa_flags;
500 act.lsa_restorer = osa.lsa_restorer;
501 LINUX_SIGEMPTYSET(act.lsa_mask);
502 act.lsa_mask.__mask = osa.lsa_mask;
503 }
504
505 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
506 args->osa ? &oact : NULL);
507
508 if (args->osa != NULL && !error) {
509 osa.lsa_handler = oact.lsa_handler;
510 osa.lsa_flags = oact.lsa_flags;
511 osa.lsa_restorer = oact.lsa_restorer;
512 osa.lsa_mask = oact.lsa_mask.__mask;
513 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
514 }
515
516 return (error);
517 }
518
519 /*
520 * Linux has two extra args, restart and oldmask. We don't use these,
521 * but it seems that "restart" is actually a context pointer that
522 * enables the signal to happen with a different register set.
523 */
524 int
linux_sigsuspend(struct thread * td,struct linux_sigsuspend_args * args)525 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
526 {
527 sigset_t sigmask;
528 l_sigset_t mask;
529
530 LINUX_SIGEMPTYSET(mask);
531 mask.__mask = args->mask;
532 linux_to_bsd_sigset(&mask, &sigmask);
533 return (kern_sigsuspend(td, sigmask));
534 }
535
536 int
linux_pause(struct thread * td,struct linux_pause_args * args)537 linux_pause(struct thread *td, struct linux_pause_args *args)
538 {
539 struct proc *p = td->td_proc;
540 sigset_t sigmask;
541
542 PROC_LOCK(p);
543 sigmask = td->td_sigmask;
544 PROC_UNLOCK(p);
545 return (kern_sigsuspend(td, sigmask));
546 }
547
548 int
linux_gettimeofday(struct thread * td,struct linux_gettimeofday_args * uap)549 linux_gettimeofday(struct thread *td, struct linux_gettimeofday_args *uap)
550 {
551 struct timeval atv;
552 l_timeval atv32;
553 struct timezone rtz;
554 int error = 0;
555
556 if (uap->tp) {
557 microtime(&atv);
558 atv32.tv_sec = atv.tv_sec;
559 atv32.tv_usec = atv.tv_usec;
560 error = copyout(&atv32, uap->tp, sizeof(atv32));
561 }
562 if (error == 0 && uap->tzp != NULL) {
563 rtz.tz_minuteswest = 0;
564 rtz.tz_dsttime = 0;
565 error = copyout(&rtz, uap->tzp, sizeof(rtz));
566 }
567 return (error);
568 }
569
570 int
linux_settimeofday(struct thread * td,struct linux_settimeofday_args * uap)571 linux_settimeofday(struct thread *td, struct linux_settimeofday_args *uap)
572 {
573 l_timeval atv32;
574 struct timeval atv, *tvp;
575 struct timezone atz, *tzp;
576 int error;
577
578 if (uap->tp) {
579 error = copyin(uap->tp, &atv32, sizeof(atv32));
580 if (error)
581 return (error);
582 atv.tv_sec = atv32.tv_sec;
583 atv.tv_usec = atv32.tv_usec;
584 tvp = &atv;
585 } else
586 tvp = NULL;
587 if (uap->tzp) {
588 error = copyin(uap->tzp, &atz, sizeof(atz));
589 if (error)
590 return (error);
591 tzp = &atz;
592 } else
593 tzp = NULL;
594 return (kern_settimeofday(td, tvp, tzp));
595 }
596
597 int
linux_getrusage(struct thread * td,struct linux_getrusage_args * uap)598 linux_getrusage(struct thread *td, struct linux_getrusage_args *uap)
599 {
600 struct rusage s;
601 int error;
602
603 error = kern_getrusage(td, uap->who, &s);
604 if (error != 0)
605 return (error);
606 if (uap->rusage != NULL)
607 error = linux_copyout_rusage(&s, uap->rusage);
608 return (error);
609 }
610
611 int
linux_set_thread_area(struct thread * td,struct linux_set_thread_area_args * args)612 linux_set_thread_area(struct thread *td,
613 struct linux_set_thread_area_args *args)
614 {
615 struct l_user_desc info;
616 struct pcb *pcb;
617 int error;
618
619 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
620 if (error)
621 return (error);
622
623 /*
624 * Semantics of Linux version: every thread in the system has array
625 * of three TLS descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown.
626 * This syscall loads one of the selected TLS descriptors with a value
627 * and also loads GDT descriptors 6, 7 and 8 with the content of
628 * the per-thread descriptors.
629 *
630 * Semantics of FreeBSD version: I think we can ignore that Linux has
631 * three per-thread descriptors and use just the first one.
632 * The tls_array[] is used only in [gs]et_thread_area() syscalls and
633 * for loading the GDT descriptors. We use just one GDT descriptor
634 * for TLS, so we will load just one.
635 *
636 * XXX: This doesn't work when a user space process tries to use more
637 * than one TLS segment. Comment in the Linux source says wine might
638 * do this.
639 */
640
641 /*
642 * GLIBC reads current %gs and call set_thread_area() with it.
643 * We should let GUDATA_SEL and GUGS32_SEL proceed as well because
644 * we use these segments.
645 */
646 switch (info.entry_number) {
647 case GUGS32_SEL:
648 case GUDATA_SEL:
649 case 6:
650 case -1:
651 info.entry_number = GUGS32_SEL;
652 break;
653 default:
654 return (EINVAL);
655 }
656
657 /*
658 * We have to copy out the GDT entry we use.
659 *
660 * XXX: What if a user space program does not check the return value
661 * and tries to use 6, 7 or 8?
662 */
663 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
664 if (error)
665 return (error);
666
667 pcb = td->td_pcb;
668 update_pcb_bases(pcb);
669 pcb->pcb_gsbase = (register_t)info.base_addr;
670 update_gdt_gsbase(td, info.base_addr);
671
672 return (0);
673 }
674
675 void
bsd_to_linux_regset32(const struct reg32 * b_reg,struct linux_pt_regset32 * l_regset)676 bsd_to_linux_regset32(const struct reg32 *b_reg,
677 struct linux_pt_regset32 *l_regset)
678 {
679
680 l_regset->ebx = b_reg->r_ebx;
681 l_regset->ecx = b_reg->r_ecx;
682 l_regset->edx = b_reg->r_edx;
683 l_regset->esi = b_reg->r_esi;
684 l_regset->edi = b_reg->r_edi;
685 l_regset->ebp = b_reg->r_ebp;
686 l_regset->eax = b_reg->r_eax;
687 l_regset->ds = b_reg->r_ds;
688 l_regset->es = b_reg->r_es;
689 l_regset->fs = b_reg->r_fs;
690 l_regset->gs = b_reg->r_gs;
691 l_regset->orig_eax = b_reg->r_eax;
692 l_regset->eip = b_reg->r_eip;
693 l_regset->cs = b_reg->r_cs;
694 l_regset->eflags = b_reg->r_eflags;
695 l_regset->esp = b_reg->r_esp;
696 l_regset->ss = b_reg->r_ss;
697 }
698
699 int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
700 int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval);
701 DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *))
702 {
703
704 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
705 futex_xchgl_smap : futex_xchgl_nosmap);
706 }
707
708 int futex_addl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
709 int futex_addl_smap(int oparg, uint32_t *uaddr, int *oldval);
710 DEFINE_IFUNC(, int, futex_addl, (int, uint32_t *, int *))
711 {
712
713 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
714 futex_addl_smap : futex_addl_nosmap);
715 }
716
717 int futex_orl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
718 int futex_orl_smap(int oparg, uint32_t *uaddr, int *oldval);
719 DEFINE_IFUNC(, int, futex_orl, (int, uint32_t *, int *))
720 {
721
722 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
723 futex_orl_smap : futex_orl_nosmap);
724 }
725
726 int futex_andl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
727 int futex_andl_smap(int oparg, uint32_t *uaddr, int *oldval);
728 DEFINE_IFUNC(, int, futex_andl, (int, uint32_t *, int *))
729 {
730
731 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
732 futex_andl_smap : futex_andl_nosmap);
733 }
734
735 int futex_xorl_nosmap(int oparg, uint32_t *uaddr, int *oldval);
736 int futex_xorl_smap(int oparg, uint32_t *uaddr, int *oldval);
737 DEFINE_IFUNC(, int, futex_xorl, (int, uint32_t *, int *))
738 {
739
740 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
741 futex_xorl_smap : futex_xorl_nosmap);
742 }
743
744 int
linux_ptrace_peekuser(struct thread * td,pid_t pid,void * addr,void * data)745 linux_ptrace_peekuser(struct thread *td, pid_t pid, void *addr, void *data)
746 {
747
748 LINUX_RATELIMIT_MSG_OPT1("PTRACE_PEEKUSER offset %ld not implemented; "
749 "returning EINVAL", (uintptr_t)addr);
750 return (EINVAL);
751 }
752
753 int
linux_ptrace_pokeuser(struct thread * td,pid_t pid,void * addr,void * data)754 linux_ptrace_pokeuser(struct thread *td, pid_t pid, void *addr, void *data)
755 {
756
757 LINUX_RATELIMIT_MSG_OPT1("PTRACE_POKEUSER offset %ld "
758 "not implemented; returning EINVAL", (uintptr_t)addr);
759 return (EINVAL);
760 }
761