1 /*-
2 * Copyright (c) 2000 Marcel Moolenaar
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: releng/11.2/sys/i386/linux/linux_machdep.c 332315 2018-04-09 01:07:47Z emaste $");
31
32 #include <sys/param.h>
33 #include <sys/capsicum.h>
34 #include <sys/fcntl.h>
35 #include <sys/file.h>
36 #include <sys/imgact.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/mman.h>
40 #include <sys/mutex.h>
41 #include <sys/priv.h>
42 #include <sys/proc.h>
43 #include <sys/queue.h>
44 #include <sys/resource.h>
45 #include <sys/resourcevar.h>
46 #include <sys/sched.h>
47 #include <sys/signalvar.h>
48 #include <sys/syscallsubr.h>
49 #include <sys/sysproto.h>
50 #include <sys/systm.h>
51 #include <sys/sx.h>
52 #include <sys/unistd.h>
53 #include <sys/wait.h>
54
55 #include <machine/frame.h>
56 #include <machine/psl.h>
57 #include <machine/segments.h>
58 #include <machine/sysarch.h>
59
60 #include <vm/pmap.h>
61 #include <vm/vm.h>
62 #include <vm/vm_map.h>
63
64 #include <i386/linux/linux.h>
65 #include <i386/linux/linux_proto.h>
66 #include <compat/linux/linux_emul.h>
67 #include <compat/linux/linux_ipc.h>
68 #include <compat/linux/linux_misc.h>
69 #include <compat/linux/linux_mmap.h>
70 #include <compat/linux/linux_signal.h>
71 #include <compat/linux/linux_util.h>
72
73 #include <i386/include/pcb.h> /* needed for pcb definition in linux_set_thread_area */
74
75 #include "opt_posix.h"
76
77 extern struct sysentvec elf32_freebsd_sysvec; /* defined in i386/i386/elf_machdep.c */
78
79 struct l_descriptor {
80 l_uint entry_number;
81 l_ulong base_addr;
82 l_uint limit;
83 l_uint seg_32bit:1;
84 l_uint contents:2;
85 l_uint read_exec_only:1;
86 l_uint limit_in_pages:1;
87 l_uint seg_not_present:1;
88 l_uint useable:1;
89 };
90
91 struct l_old_select_argv {
92 l_int nfds;
93 l_fd_set *readfds;
94 l_fd_set *writefds;
95 l_fd_set *exceptfds;
96 struct l_timeval *timeout;
97 };
98
99
100 int
101 linux_execve(struct thread *td, struct linux_execve_args *args)
102 {
103 struct image_args eargs;
104 char *newpath;
105 int error;
106
107 LCONVPATHEXIST(td, args->path, &newpath);
108
109 #ifdef DEBUG
110 if (ldebug(execve))
111 printf(ARGS(execve, "%s"), newpath);
112 #endif
113
114 error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
115 args->argp, args->envp);
116 free(newpath, M_TEMP);
117 if (error == 0)
118 error = linux_common_execve(td, &eargs);
119 return (error);
120 }
121
122 struct l_ipc_kludge {
123 struct l_msgbuf *msgp;
124 l_long msgtyp;
125 };
126
127 int
128 linux_ipc(struct thread *td, struct linux_ipc_args *args)
129 {
130
131 switch (args->what & 0xFFFF) {
132 case LINUX_SEMOP: {
133 struct linux_semop_args a;
134
135 a.semid = args->arg1;
136 a.tsops = args->ptr;
137 a.nsops = args->arg2;
138 return (linux_semop(td, &a));
139 }
140 case LINUX_SEMGET: {
141 struct linux_semget_args a;
142
143 a.key = args->arg1;
144 a.nsems = args->arg2;
145 a.semflg = args->arg3;
146 return (linux_semget(td, &a));
147 }
148 case LINUX_SEMCTL: {
149 struct linux_semctl_args a;
150 int error;
151
152 a.semid = args->arg1;
153 a.semnum = args->arg2;
154 a.cmd = args->arg3;
155 error = copyin(args->ptr, &a.arg, sizeof(a.arg));
156 if (error)
157 return (error);
158 return (linux_semctl(td, &a));
159 }
160 case LINUX_MSGSND: {
161 struct linux_msgsnd_args a;
162
163 a.msqid = args->arg1;
164 a.msgp = args->ptr;
165 a.msgsz = args->arg2;
166 a.msgflg = args->arg3;
167 return (linux_msgsnd(td, &a));
168 }
169 case LINUX_MSGRCV: {
170 struct linux_msgrcv_args a;
171
172 a.msqid = args->arg1;
173 a.msgsz = args->arg2;
174 a.msgflg = args->arg3;
175 if ((args->what >> 16) == 0) {
176 struct l_ipc_kludge tmp;
177 int error;
178
179 if (args->ptr == NULL)
180 return (EINVAL);
181 error = copyin(args->ptr, &tmp, sizeof(tmp));
182 if (error)
183 return (error);
184 a.msgp = tmp.msgp;
185 a.msgtyp = tmp.msgtyp;
186 } else {
187 a.msgp = args->ptr;
188 a.msgtyp = args->arg5;
189 }
190 return (linux_msgrcv(td, &a));
191 }
192 case LINUX_MSGGET: {
193 struct linux_msgget_args a;
194
195 a.key = args->arg1;
196 a.msgflg = args->arg2;
197 return (linux_msgget(td, &a));
198 }
199 case LINUX_MSGCTL: {
200 struct linux_msgctl_args a;
201
202 a.msqid = args->arg1;
203 a.cmd = args->arg2;
204 a.buf = args->ptr;
205 return (linux_msgctl(td, &a));
206 }
207 case LINUX_SHMAT: {
208 struct linux_shmat_args a;
209
210 a.shmid = args->arg1;
211 a.shmaddr = args->ptr;
212 a.shmflg = args->arg2;
213 a.raddr = (l_ulong *)args->arg3;
214 return (linux_shmat(td, &a));
215 }
216 case LINUX_SHMDT: {
217 struct linux_shmdt_args a;
218
219 a.shmaddr = args->ptr;
220 return (linux_shmdt(td, &a));
221 }
222 case LINUX_SHMGET: {
223 struct linux_shmget_args a;
224
225 a.key = args->arg1;
226 a.size = args->arg2;
227 a.shmflg = args->arg3;
228 return (linux_shmget(td, &a));
229 }
230 case LINUX_SHMCTL: {
231 struct linux_shmctl_args a;
232
233 a.shmid = args->arg1;
234 a.cmd = args->arg2;
235 a.buf = args->ptr;
236 return (linux_shmctl(td, &a));
237 }
238 default:
239 break;
240 }
241
242 return (EINVAL);
243 }
244
245 int
246 linux_old_select(struct thread *td, struct linux_old_select_args *args)
247 {
248 struct l_old_select_argv linux_args;
249 struct linux_select_args newsel;
250 int error;
251
252 #ifdef DEBUG
253 if (ldebug(old_select))
254 printf(ARGS(old_select, "%p"), args->ptr);
255 #endif
256
257 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
258 if (error)
259 return (error);
260
261 newsel.nfds = linux_args.nfds;
262 newsel.readfds = linux_args.readfds;
263 newsel.writefds = linux_args.writefds;
264 newsel.exceptfds = linux_args.exceptfds;
265 newsel.timeout = linux_args.timeout;
266 return (linux_select(td, &newsel));
267 }
268
269 int
270 linux_set_cloned_tls(struct thread *td, void *desc)
271 {
272 struct segment_descriptor sd;
273 struct l_user_desc info;
274 int idx, error;
275 int a[2];
276
277 error = copyin(desc, &info, sizeof(struct l_user_desc));
278 if (error) {
279 printf(LMSG("copyin failed!"));
280 } else {
281 idx = info.entry_number;
282
283 /*
284 * looks like we're getting the idx we returned
285 * in the set_thread_area() syscall
286 */
287 if (idx != 6 && idx != 3) {
288 printf(LMSG("resetting idx!"));
289 idx = 3;
290 }
291
292 /* this doesnt happen in practice */
293 if (idx == 6) {
294 /* we might copy out the entry_number as 3 */
295 info.entry_number = 3;
296 error = copyout(&info, desc, sizeof(struct l_user_desc));
297 if (error)
298 printf(LMSG("copyout failed!"));
299 }
300
301 a[0] = LINUX_LDT_entry_a(&info);
302 a[1] = LINUX_LDT_entry_b(&info);
303
304 memcpy(&sd, &a, sizeof(a));
305 #ifdef DEBUG
306 if (ldebug(clone))
307 printf("Segment created in clone with "
308 "CLONE_SETTLS: lobase: %x, hibase: %x, "
309 "lolimit: %x, hilimit: %x, type: %i, "
310 "dpl: %i, p: %i, xx: %i, def32: %i, "
311 "gran: %i\n", sd.sd_lobase, sd.sd_hibase,
312 sd.sd_lolimit, sd.sd_hilimit, sd.sd_type,
313 sd.sd_dpl, sd.sd_p, sd.sd_xx,
314 sd.sd_def32, sd.sd_gran);
315 #endif
316
317 /* set %gs */
318 td->td_pcb->pcb_gsd = sd;
319 td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
320 }
321
322 return (error);
323 }
324
325 int
326 linux_set_upcall_kse(struct thread *td, register_t stack)
327 {
328
329 if (stack)
330 td->td_frame->tf_esp = stack;
331
332 /*
333 * The newly created Linux thread returns
334 * to the user space by the same path that a parent do.
335 */
336 td->td_frame->tf_eax = 0;
337 return (0);
338 }
339
340 int
341 linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
342 {
343
344 #ifdef DEBUG
345 if (ldebug(mmap2))
346 printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
347 (void *)args->addr, args->len, args->prot,
348 args->flags, args->fd, args->pgoff);
349 #endif
350
351 return (linux_mmap_common(td, args->addr, args->len, args->prot,
352 args->flags, args->fd, (uint64_t)(uint32_t)args->pgoff *
353 PAGE_SIZE));
354 }
355
356 int
357 linux_mmap(struct thread *td, struct linux_mmap_args *args)
358 {
359 int error;
360 struct l_mmap_argv linux_args;
361
362 error = copyin(args->ptr, &linux_args, sizeof(linux_args));
363 if (error)
364 return (error);
365
366 #ifdef DEBUG
367 if (ldebug(mmap))
368 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
369 (void *)linux_args.addr, linux_args.len, linux_args.prot,
370 linux_args.flags, linux_args.fd, linux_args.pgoff);
371 #endif
372
373 return (linux_mmap_common(td, linux_args.addr, linux_args.len,
374 linux_args.prot, linux_args.flags, linux_args.fd,
375 (uint32_t)linux_args.pgoff));
376 }
377
378 int
379 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
380 {
381
382 return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len, uap->prot));
383 }
384
385 int
386 linux_ioperm(struct thread *td, struct linux_ioperm_args *args)
387 {
388 int error;
389 struct i386_ioperm_args iia;
390
391 iia.start = args->start;
392 iia.length = args->length;
393 iia.enable = args->enable;
394 error = i386_set_ioperm(td, &iia);
395 return (error);
396 }
397
398 int
399 linux_iopl(struct thread *td, struct linux_iopl_args *args)
400 {
401 int error;
402
403 if (args->level < 0 || args->level > 3)
404 return (EINVAL);
405 if ((error = priv_check(td, PRIV_IO)) != 0)
406 return (error);
407 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
408 return (error);
409 td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) |
410 (args->level * (PSL_IOPL / 3));
411 return (0);
412 }
413
414 int
415 linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap)
416 {
417 int error;
418 struct i386_ldt_args ldt;
419 struct l_descriptor ld;
420 union descriptor desc;
421 int size, written;
422
423 switch (uap->func) {
424 case 0x00: /* read_ldt */
425 ldt.start = 0;
426 ldt.descs = uap->ptr;
427 ldt.num = uap->bytecount / sizeof(union descriptor);
428 error = i386_get_ldt(td, &ldt);
429 td->td_retval[0] *= sizeof(union descriptor);
430 break;
431 case 0x02: /* read_default_ldt = 0 */
432 size = 5*sizeof(struct l_desc_struct);
433 if (size > uap->bytecount)
434 size = uap->bytecount;
435 for (written = error = 0; written < size && error == 0; written++)
436 error = subyte((char *)uap->ptr + written, 0);
437 td->td_retval[0] = written;
438 break;
439 case 0x01: /* write_ldt */
440 case 0x11: /* write_ldt */
441 if (uap->bytecount != sizeof(ld))
442 return (EINVAL);
443
444 error = copyin(uap->ptr, &ld, sizeof(ld));
445 if (error)
446 return (error);
447
448 ldt.start = ld.entry_number;
449 ldt.descs = &desc;
450 ldt.num = 1;
451 desc.sd.sd_lolimit = (ld.limit & 0x0000ffff);
452 desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
453 desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff);
454 desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
455 desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
456 (ld.contents << 2);
457 desc.sd.sd_dpl = 3;
458 desc.sd.sd_p = (ld.seg_not_present ^ 1);
459 desc.sd.sd_xx = 0;
460 desc.sd.sd_def32 = ld.seg_32bit;
461 desc.sd.sd_gran = ld.limit_in_pages;
462 error = i386_set_ldt(td, &ldt, &desc);
463 break;
464 default:
465 error = ENOSYS;
466 break;
467 }
468
469 if (error == EOPNOTSUPP) {
470 printf("linux: modify_ldt needs kernel option USER_LDT\n");
471 error = ENOSYS;
472 }
473
474 return (error);
475 }
476
477 int
478 linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
479 {
480 l_osigaction_t osa;
481 l_sigaction_t act, oact;
482 int error;
483
484 #ifdef DEBUG
485 if (ldebug(sigaction))
486 printf(ARGS(sigaction, "%d, %p, %p"),
487 args->sig, (void *)args->nsa, (void *)args->osa);
488 #endif
489
490 if (args->nsa != NULL) {
491 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
492 if (error)
493 return (error);
494 act.lsa_handler = osa.lsa_handler;
495 act.lsa_flags = osa.lsa_flags;
496 act.lsa_restorer = osa.lsa_restorer;
497 LINUX_SIGEMPTYSET(act.lsa_mask);
498 act.lsa_mask.__mask = osa.lsa_mask;
499 }
500
501 error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
502 args->osa ? &oact : NULL);
503
504 if (args->osa != NULL && !error) {
505 osa.lsa_handler = oact.lsa_handler;
506 osa.lsa_flags = oact.lsa_flags;
507 osa.lsa_restorer = oact.lsa_restorer;
508 osa.lsa_mask = oact.lsa_mask.__mask;
509 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
510 }
511
512 return (error);
513 }
514
515 /*
516 * Linux has two extra args, restart and oldmask. We dont use these,
517 * but it seems that "restart" is actually a context pointer that
518 * enables the signal to happen with a different register set.
519 */
520 int
521 linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
522 {
523 sigset_t sigmask;
524 l_sigset_t mask;
525
526 #ifdef DEBUG
527 if (ldebug(sigsuspend))
528 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
529 #endif
530
531 LINUX_SIGEMPTYSET(mask);
532 mask.__mask = args->mask;
533 linux_to_bsd_sigset(&mask, &sigmask);
534 return (kern_sigsuspend(td, sigmask));
535 }
536
537 int
538 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
539 {
540 l_sigset_t lmask;
541 sigset_t sigmask;
542 int error;
543
544 #ifdef DEBUG
545 if (ldebug(rt_sigsuspend))
546 printf(ARGS(rt_sigsuspend, "%p, %d"),
547 (void *)uap->newset, uap->sigsetsize);
548 #endif
549
550 if (uap->sigsetsize != sizeof(l_sigset_t))
551 return (EINVAL);
552
553 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
554 if (error)
555 return (error);
556
557 linux_to_bsd_sigset(&lmask, &sigmask);
558 return (kern_sigsuspend(td, sigmask));
559 }
560
561 int
562 linux_pause(struct thread *td, struct linux_pause_args *args)
563 {
564 struct proc *p = td->td_proc;
565 sigset_t sigmask;
566
567 #ifdef DEBUG
568 if (ldebug(pause))
569 printf(ARGS(pause, ""));
570 #endif
571
572 PROC_LOCK(p);
573 sigmask = td->td_sigmask;
574 PROC_UNLOCK(p);
575 return (kern_sigsuspend(td, sigmask));
576 }
577
578 int
579 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
580 {
581 stack_t ss, oss;
582 l_stack_t lss;
583 int error;
584
585 #ifdef DEBUG
586 if (ldebug(sigaltstack))
587 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
588 #endif
589
590 if (uap->uss != NULL) {
591 error = copyin(uap->uss, &lss, sizeof(l_stack_t));
592 if (error)
593 return (error);
594
595 ss.ss_sp = lss.ss_sp;
596 ss.ss_size = lss.ss_size;
597 ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
598 }
599 error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
600 (uap->uoss != NULL) ? &oss : NULL);
601 if (!error && uap->uoss != NULL) {
602 lss.ss_sp = oss.ss_sp;
603 lss.ss_size = oss.ss_size;
604 lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
605 error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
606 }
607
608 return (error);
609 }
610
611 int
612 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
613 {
614
615 #ifdef DEBUG
616 if (ldebug(ftruncate64))
617 printf(ARGS(ftruncate64, "%u, %jd"), args->fd,
618 (intmax_t)args->length);
619 #endif
620
621 return (kern_ftruncate(td, args->fd, args->length));
622 }
623
624 int
625 linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args)
626 {
627 struct l_user_desc info;
628 int error;
629 int idx;
630 int a[2];
631 struct segment_descriptor sd;
632
633 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
634 if (error)
635 return (error);
636
637 #ifdef DEBUG
638 if (ldebug(set_thread_area))
639 printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
640 info.entry_number,
641 info.base_addr,
642 info.limit,
643 info.seg_32bit,
644 info.contents,
645 info.read_exec_only,
646 info.limit_in_pages,
647 info.seg_not_present,
648 info.useable);
649 #endif
650
651 idx = info.entry_number;
652 /*
653 * Semantics of linux version: every thread in the system has array of
654 * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This
655 * syscall loads one of the selected tls decriptors with a value and
656 * also loads GDT descriptors 6, 7 and 8 with the content of the
657 * per-thread descriptors.
658 *
659 * Semantics of fbsd version: I think we can ignore that linux has 3
660 * per-thread descriptors and use just the 1st one. The tls_array[]
661 * is used only in set/get-thread_area() syscalls and for loading the
662 * GDT descriptors. In fbsd we use just one GDT descriptor for TLS so
663 * we will load just one.
664 *
665 * XXX: this doesn't work when a user space process tries to use more
666 * than 1 TLS segment. Comment in the linux sources says wine might do
667 * this.
668 */
669
670 /*
671 * we support just GLIBC TLS now
672 * we should let 3 proceed as well because we use this segment so
673 * if code does two subsequent calls it should succeed
674 */
675 if (idx != 6 && idx != -1 && idx != 3)
676 return (EINVAL);
677
678 /*
679 * we have to copy out the GDT entry we use
680 * FreeBSD uses GDT entry #3 for storing %gs so load that
681 *
682 * XXX: what if a user space program doesn't check this value and tries
683 * to use 6, 7 or 8?
684 */
685 idx = info.entry_number = 3;
686 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
687 if (error)
688 return (error);
689
690 if (LINUX_LDT_empty(&info)) {
691 a[0] = 0;
692 a[1] = 0;
693 } else {
694 a[0] = LINUX_LDT_entry_a(&info);
695 a[1] = LINUX_LDT_entry_b(&info);
696 }
697
698 memcpy(&sd, &a, sizeof(a));
699 #ifdef DEBUG
700 if (ldebug(set_thread_area))
701 printf("Segment created in set_thread_area: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
702 sd.sd_hibase,
703 sd.sd_lolimit,
704 sd.sd_hilimit,
705 sd.sd_type,
706 sd.sd_dpl,
707 sd.sd_p,
708 sd.sd_xx,
709 sd.sd_def32,
710 sd.sd_gran);
711 #endif
712
713 /* this is taken from i386 version of cpu_set_user_tls() */
714 critical_enter();
715 /* set %gs */
716 td->td_pcb->pcb_gsd = sd;
717 PCPU_GET(fsgs_gdt)[1] = sd;
718 load_gs(GSEL(GUGS_SEL, SEL_UPL));
719 critical_exit();
720
721 return (0);
722 }
723
724 int
725 linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args)
726 {
727
728 struct l_user_desc info;
729 int error;
730 int idx;
731 struct l_desc_struct desc;
732 struct segment_descriptor sd;
733
734 #ifdef DEBUG
735 if (ldebug(get_thread_area))
736 printf(ARGS(get_thread_area, "%p"), args->desc);
737 #endif
738
739 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
740 if (error)
741 return (error);
742
743 idx = info.entry_number;
744 /* XXX: I am not sure if we want 3 to be allowed too. */
745 if (idx != 6 && idx != 3)
746 return (EINVAL);
747
748 idx = 3;
749
750 memset(&info, 0, sizeof(info));
751
752 sd = PCPU_GET(fsgs_gdt)[1];
753
754 memcpy(&desc, &sd, sizeof(desc));
755
756 info.entry_number = idx;
757 info.base_addr = LINUX_GET_BASE(&desc);
758 info.limit = LINUX_GET_LIMIT(&desc);
759 info.seg_32bit = LINUX_GET_32BIT(&desc);
760 info.contents = LINUX_GET_CONTENTS(&desc);
761 info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
762 info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
763 info.seg_not_present = !LINUX_GET_PRESENT(&desc);
764 info.useable = LINUX_GET_USEABLE(&desc);
765
766 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
767 if (error)
768 return (EFAULT);
769
770 return (0);
771 }
772
773 /* XXX: this wont work with module - convert it */
774 int
775 linux_mq_open(struct thread *td, struct linux_mq_open_args *args)
776 {
777 #ifdef P1003_1B_MQUEUE
778 return sys_kmq_open(td, (struct kmq_open_args *) args);
779 #else
780 return (ENOSYS);
781 #endif
782 }
783
784 int
785 linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args)
786 {
787 #ifdef P1003_1B_MQUEUE
788 return sys_kmq_unlink(td, (struct kmq_unlink_args *) args);
789 #else
790 return (ENOSYS);
791 #endif
792 }
793
794 int
795 linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args)
796 {
797 #ifdef P1003_1B_MQUEUE
798 return sys_kmq_timedsend(td, (struct kmq_timedsend_args *) args);
799 #else
800 return (ENOSYS);
801 #endif
802 }
803
804 int
805 linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args)
806 {
807 #ifdef P1003_1B_MQUEUE
808 return sys_kmq_timedreceive(td, (struct kmq_timedreceive_args *) args);
809 #else
810 return (ENOSYS);
811 #endif
812 }
813
814 int
815 linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args)
816 {
817 #ifdef P1003_1B_MQUEUE
818 return sys_kmq_notify(td, (struct kmq_notify_args *) args);
819 #else
820 return (ENOSYS);
821 #endif
822 }
823
824 int
825 linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args)
826 {
827 #ifdef P1003_1B_MQUEUE
828 return sys_kmq_setattr(td, (struct kmq_setattr_args *) args);
829 #else
830 return (ENOSYS);
831 #endif
832 }
Cache object: 87366807c5086a1cf9a2a120de02c94c
|