1 /*-
2 * Copyright (c) 2002 Doug Rabson
3 * Copyright (c) 1994-1995 Søren Schmidt
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: src/sys/compat/linux/linux_misc.c,v 1.231 2008/12/29 12:58:45 ed Exp $");
32
33 #include "opt_compat.h"
34 #include "opt_mac.h"
35
36 #include <sys/param.h>
37 #include <sys/blist.h>
38 #include <sys/fcntl.h>
39 #if defined(__i386__)
40 #include <sys/imgact_aout.h>
41 #endif
42 #include <sys/jail.h>
43 #include <sys/kernel.h>
44 #include <sys/limits.h>
45 #include <sys/lock.h>
46 #include <sys/malloc.h>
47 #include <sys/mman.h>
48 #include <sys/mount.h>
49 #include <sys/mutex.h>
50 #include <sys/namei.h>
51 #include <sys/priv.h>
52 #include <sys/proc.h>
53 #include <sys/reboot.h>
54 #include <sys/resourcevar.h>
55 #include <sys/sched.h>
56 #include <sys/signalvar.h>
57 #include <sys/stat.h>
58 #include <sys/syscallsubr.h>
59 #include <sys/sysctl.h>
60 #include <sys/sysproto.h>
61 #include <sys/systm.h>
62 #include <sys/time.h>
63 #include <sys/vmmeter.h>
64 #include <sys/vnode.h>
65 #include <sys/wait.h>
66 #include <sys/cpuset.h>
67 #include <sys/vimage.h>
68
69 #include <security/mac/mac_framework.h>
70
71 #include <vm/vm.h>
72 #include <vm/pmap.h>
73 #include <vm/vm_kern.h>
74 #include <vm/vm_map.h>
75 #include <vm/vm_extern.h>
76 #include <vm/vm_object.h>
77 #include <vm/swap_pager.h>
78
79 #ifdef COMPAT_LINUX32
80 #include <machine/../linux32/linux.h>
81 #include <machine/../linux32/linux32_proto.h>
82 #else
83 #include <machine/../linux/linux.h>
84 #include <machine/../linux/linux_proto.h>
85 #endif
86
87 #include <compat/linux/linux_file.h>
88 #include <compat/linux/linux_mib.h>
89 #include <compat/linux/linux_signal.h>
90 #include <compat/linux/linux_util.h>
91 #include <compat/linux/linux_sysproto.h>
92 #include <compat/linux/linux_emul.h>
93 #include <compat/linux/linux_misc.h>
94
95 #ifdef __i386__
96 #include <machine/cputypes.h>
97 #endif
98
99 #define BSD_TO_LINUX_SIGNAL(sig) \
100 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
101
102 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
103 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
104 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
105 RLIMIT_MEMLOCK, RLIMIT_AS
106 };
107
108 struct l_sysinfo {
109 l_long uptime; /* Seconds since boot */
110 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
111 #define LINUX_SYSINFO_LOADS_SCALE 65536
112 l_ulong totalram; /* Total usable main memory size */
113 l_ulong freeram; /* Available memory size */
114 l_ulong sharedram; /* Amount of shared memory */
115 l_ulong bufferram; /* Memory used by buffers */
116 l_ulong totalswap; /* Total swap space size */
117 l_ulong freeswap; /* swap space still available */
118 l_ushort procs; /* Number of current processes */
119 l_ushort pads;
120 l_ulong totalbig;
121 l_ulong freebig;
122 l_uint mem_unit;
123 char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */
124 };
125 int
126 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
127 {
128 struct l_sysinfo sysinfo;
129 vm_object_t object;
130 int i, j;
131 struct timespec ts;
132
133 getnanouptime(&ts);
134 if (ts.tv_nsec != 0)
135 ts.tv_sec++;
136 sysinfo.uptime = ts.tv_sec;
137
138 /* Use the information from the mib to get our load averages */
139 for (i = 0; i < 3; i++)
140 sysinfo.loads[i] = averunnable.ldavg[i] *
141 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
142
143 sysinfo.totalram = physmem * PAGE_SIZE;
144 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
145
146 sysinfo.sharedram = 0;
147 mtx_lock(&vm_object_list_mtx);
148 TAILQ_FOREACH(object, &vm_object_list, object_list)
149 if (object->shadow_count > 1)
150 sysinfo.sharedram += object->resident_page_count;
151 mtx_unlock(&vm_object_list_mtx);
152
153 sysinfo.sharedram *= PAGE_SIZE;
154 sysinfo.bufferram = 0;
155
156 swap_pager_status(&i, &j);
157 sysinfo.totalswap = i * PAGE_SIZE;
158 sysinfo.freeswap = (i - j) * PAGE_SIZE;
159
160 sysinfo.procs = nprocs;
161
162 /* The following are only present in newer Linux kernels. */
163 sysinfo.totalbig = 0;
164 sysinfo.freebig = 0;
165 sysinfo.mem_unit = 1;
166
167 return copyout(&sysinfo, args->info, sizeof(sysinfo));
168 }
169
170 int
171 linux_alarm(struct thread *td, struct linux_alarm_args *args)
172 {
173 struct itimerval it, old_it;
174 u_int secs;
175 int error;
176
177 #ifdef DEBUG
178 if (ldebug(alarm))
179 printf(ARGS(alarm, "%u"), args->secs);
180 #endif
181
182 secs = args->secs;
183
184 if (secs > INT_MAX)
185 secs = INT_MAX;
186
187 it.it_value.tv_sec = (long) secs;
188 it.it_value.tv_usec = 0;
189 it.it_interval.tv_sec = 0;
190 it.it_interval.tv_usec = 0;
191 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
192 if (error)
193 return (error);
194 if (timevalisset(&old_it.it_value)) {
195 if (old_it.it_value.tv_usec != 0)
196 old_it.it_value.tv_sec++;
197 td->td_retval[0] = old_it.it_value.tv_sec;
198 }
199 return (0);
200 }
201
202 int
203 linux_brk(struct thread *td, struct linux_brk_args *args)
204 {
205 struct vmspace *vm = td->td_proc->p_vmspace;
206 vm_offset_t new, old;
207 struct obreak_args /* {
208 char * nsize;
209 } */ tmp;
210
211 #ifdef DEBUG
212 if (ldebug(brk))
213 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
214 #endif
215 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
216 new = (vm_offset_t)args->dsend;
217 tmp.nsize = (char *)new;
218 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp))
219 td->td_retval[0] = (long)new;
220 else
221 td->td_retval[0] = (long)old;
222
223 return 0;
224 }
225
226 #if defined(__i386__)
227 /* XXX: what about amd64/linux32? */
228
229 int
230 linux_uselib(struct thread *td, struct linux_uselib_args *args)
231 {
232 struct nameidata ni;
233 struct vnode *vp;
234 struct exec *a_out;
235 struct vattr attr;
236 vm_offset_t vmaddr;
237 unsigned long file_offset;
238 vm_offset_t buffer;
239 unsigned long bss_size;
240 char *library;
241 int error;
242 int locked, vfslocked;
243
244 LCONVPATHEXIST(td, args->library, &library);
245
246 #ifdef DEBUG
247 if (ldebug(uselib))
248 printf(ARGS(uselib, "%s"), library);
249 #endif
250
251 a_out = NULL;
252 vfslocked = 0;
253 locked = 0;
254 vp = NULL;
255
256 NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | MPSAFE | AUDITVNODE1,
257 UIO_SYSSPACE, library, td);
258 error = namei(&ni);
259 LFREEPATH(library);
260 if (error)
261 goto cleanup;
262
263 vp = ni.ni_vp;
264 vfslocked = NDHASGIANT(&ni);
265 NDFREE(&ni, NDF_ONLY_PNBUF);
266
267 /*
268 * From here on down, we have a locked vnode that must be unlocked.
269 * XXX: The code below largely duplicates exec_check_permissions().
270 */
271 locked = 1;
272
273 /* Writable? */
274 if (vp->v_writecount) {
275 error = ETXTBSY;
276 goto cleanup;
277 }
278
279 /* Executable? */
280 error = VOP_GETATTR(vp, &attr, td->td_ucred);
281 if (error)
282 goto cleanup;
283
284 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
285 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
286 /* EACCESS is what exec(2) returns. */
287 error = ENOEXEC;
288 goto cleanup;
289 }
290
291 /* Sensible size? */
292 if (attr.va_size == 0) {
293 error = ENOEXEC;
294 goto cleanup;
295 }
296
297 /* Can we access it? */
298 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
299 if (error)
300 goto cleanup;
301
302 /*
303 * XXX: This should use vn_open() so that it is properly authorized,
304 * and to reduce code redundancy all over the place here.
305 * XXX: Not really, it duplicates far more of exec_check_permissions()
306 * than vn_open().
307 */
308 #ifdef MAC
309 error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
310 if (error)
311 goto cleanup;
312 #endif
313 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
314 if (error)
315 goto cleanup;
316
317 /* Pull in executable header into kernel_map */
318 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
319 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
320 if (error)
321 goto cleanup;
322
323 /* Is it a Linux binary ? */
324 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
325 error = ENOEXEC;
326 goto cleanup;
327 }
328
329 /*
330 * While we are here, we should REALLY do some more checks
331 */
332
333 /* Set file/virtual offset based on a.out variant. */
334 switch ((int)(a_out->a_magic & 0xffff)) {
335 case 0413: /* ZMAGIC */
336 file_offset = 1024;
337 break;
338 case 0314: /* QMAGIC */
339 file_offset = 0;
340 break;
341 default:
342 error = ENOEXEC;
343 goto cleanup;
344 }
345
346 bss_size = round_page(a_out->a_bss);
347
348 /* Check various fields in header for validity/bounds. */
349 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
350 error = ENOEXEC;
351 goto cleanup;
352 }
353
354 /* text + data can't exceed file size */
355 if (a_out->a_data + a_out->a_text > attr.va_size) {
356 error = EFAULT;
357 goto cleanup;
358 }
359
360 /*
361 * text/data/bss must not exceed limits
362 * XXX - this is not complete. it should check current usage PLUS
363 * the resources needed by this library.
364 */
365 PROC_LOCK(td->td_proc);
366 if (a_out->a_text > maxtsiz ||
367 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) {
368 PROC_UNLOCK(td->td_proc);
369 error = ENOMEM;
370 goto cleanup;
371 }
372 PROC_UNLOCK(td->td_proc);
373
374 /*
375 * Prevent more writers.
376 * XXX: Note that if any of the VM operations fail below we don't
377 * clear this flag.
378 */
379 vp->v_vflag |= VV_TEXT;
380
381 /*
382 * Lock no longer needed
383 */
384 locked = 0;
385 VOP_UNLOCK(vp, 0);
386 VFS_UNLOCK_GIANT(vfslocked);
387
388 /*
389 * Check if file_offset page aligned. Currently we cannot handle
390 * misalinged file offsets, and so we read in the entire image
391 * (what a waste).
392 */
393 if (file_offset & PAGE_MASK) {
394 #ifdef DEBUG
395 printf("uselib: Non page aligned binary %lu\n", file_offset);
396 #endif
397 /* Map text+data read/write/execute */
398
399 /* a_entry is the load address and is page aligned */
400 vmaddr = trunc_page(a_out->a_entry);
401
402 /* get anon user mapping, read+write+execute */
403 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
404 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
405 VM_PROT_ALL, 0);
406 if (error)
407 goto cleanup;
408
409 /* map file into kernel_map */
410 error = vm_mmap(kernel_map, &buffer,
411 round_page(a_out->a_text + a_out->a_data + file_offset),
412 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp,
413 trunc_page(file_offset));
414 if (error)
415 goto cleanup;
416
417 /* copy from kernel VM space to user space */
418 error = copyout(PTRIN(buffer + file_offset),
419 (void *)vmaddr, a_out->a_text + a_out->a_data);
420
421 /* release temporary kernel space */
422 vm_map_remove(kernel_map, buffer, buffer +
423 round_page(a_out->a_text + a_out->a_data + file_offset));
424
425 if (error)
426 goto cleanup;
427 } else {
428 #ifdef DEBUG
429 printf("uselib: Page aligned binary %lu\n", file_offset);
430 #endif
431 /*
432 * for QMAGIC, a_entry is 20 bytes beyond the load address
433 * to skip the executable header
434 */
435 vmaddr = trunc_page(a_out->a_entry);
436
437 /*
438 * Map it all into the process's space as a single
439 * copy-on-write "data" segment.
440 */
441 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
442 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
443 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
444 if (error)
445 goto cleanup;
446 }
447 #ifdef DEBUG
448 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
449 ((long *)vmaddr)[1]);
450 #endif
451 if (bss_size != 0) {
452 /* Calculate BSS start address */
453 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
454 a_out->a_data;
455
456 /* allocate some 'anon' space */
457 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
458 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
459 if (error)
460 goto cleanup;
461 }
462
463 cleanup:
464 /* Unlock vnode if needed */
465 if (locked) {
466 VOP_UNLOCK(vp, 0);
467 VFS_UNLOCK_GIANT(vfslocked);
468 }
469
470 /* Release the kernel mapping. */
471 if (a_out)
472 vm_map_remove(kernel_map, (vm_offset_t)a_out,
473 (vm_offset_t)a_out + PAGE_SIZE);
474
475 return error;
476 }
477
478 #endif /* __i386__ */
479
480 int
481 linux_select(struct thread *td, struct linux_select_args *args)
482 {
483 l_timeval ltv;
484 struct timeval tv0, tv1, utv, *tvp;
485 int error;
486
487 #ifdef DEBUG
488 if (ldebug(select))
489 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
490 (void *)args->readfds, (void *)args->writefds,
491 (void *)args->exceptfds, (void *)args->timeout);
492 #endif
493
494 /*
495 * Store current time for computation of the amount of
496 * time left.
497 */
498 if (args->timeout) {
499 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
500 goto select_out;
501 utv.tv_sec = ltv.tv_sec;
502 utv.tv_usec = ltv.tv_usec;
503 #ifdef DEBUG
504 if (ldebug(select))
505 printf(LMSG("incoming timeout (%jd/%ld)"),
506 (intmax_t)utv.tv_sec, utv.tv_usec);
507 #endif
508
509 if (itimerfix(&utv)) {
510 /*
511 * The timeval was invalid. Convert it to something
512 * valid that will act as it does under Linux.
513 */
514 utv.tv_sec += utv.tv_usec / 1000000;
515 utv.tv_usec %= 1000000;
516 if (utv.tv_usec < 0) {
517 utv.tv_sec -= 1;
518 utv.tv_usec += 1000000;
519 }
520 if (utv.tv_sec < 0)
521 timevalclear(&utv);
522 }
523 microtime(&tv0);
524 tvp = &utv;
525 } else
526 tvp = NULL;
527
528 error = kern_select(td, args->nfds, args->readfds, args->writefds,
529 args->exceptfds, tvp);
530
531 #ifdef DEBUG
532 if (ldebug(select))
533 printf(LMSG("real select returns %d"), error);
534 #endif
535 if (error)
536 goto select_out;
537
538 if (args->timeout) {
539 if (td->td_retval[0]) {
540 /*
541 * Compute how much time was left of the timeout,
542 * by subtracting the current time and the time
543 * before we started the call, and subtracting
544 * that result from the user-supplied value.
545 */
546 microtime(&tv1);
547 timevalsub(&tv1, &tv0);
548 timevalsub(&utv, &tv1);
549 if (utv.tv_sec < 0)
550 timevalclear(&utv);
551 } else
552 timevalclear(&utv);
553 #ifdef DEBUG
554 if (ldebug(select))
555 printf(LMSG("outgoing timeout (%jd/%ld)"),
556 (intmax_t)utv.tv_sec, utv.tv_usec);
557 #endif
558 ltv.tv_sec = utv.tv_sec;
559 ltv.tv_usec = utv.tv_usec;
560 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
561 goto select_out;
562 }
563
564 select_out:
565 #ifdef DEBUG
566 if (ldebug(select))
567 printf(LMSG("select_out -> %d"), error);
568 #endif
569 return error;
570 }
571
572 int
573 linux_mremap(struct thread *td, struct linux_mremap_args *args)
574 {
575 struct munmap_args /* {
576 void *addr;
577 size_t len;
578 } */ bsd_args;
579 int error = 0;
580
581 #ifdef DEBUG
582 if (ldebug(mremap))
583 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
584 (void *)(uintptr_t)args->addr,
585 (unsigned long)args->old_len,
586 (unsigned long)args->new_len,
587 (unsigned long)args->flags);
588 #endif
589
590 if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
591 td->td_retval[0] = 0;
592 return (EINVAL);
593 }
594
595 /*
596 * Check for the page alignment.
597 * Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
598 */
599 if (args->addr & PAGE_MASK) {
600 td->td_retval[0] = 0;
601 return (EINVAL);
602 }
603
604 args->new_len = round_page(args->new_len);
605 args->old_len = round_page(args->old_len);
606
607 if (args->new_len > args->old_len) {
608 td->td_retval[0] = 0;
609 return ENOMEM;
610 }
611
612 if (args->new_len < args->old_len) {
613 bsd_args.addr =
614 (caddr_t)((uintptr_t)args->addr + args->new_len);
615 bsd_args.len = args->old_len - args->new_len;
616 error = munmap(td, &bsd_args);
617 }
618
619 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
620 return error;
621 }
622
623 #define LINUX_MS_ASYNC 0x0001
624 #define LINUX_MS_INVALIDATE 0x0002
625 #define LINUX_MS_SYNC 0x0004
626
627 int
628 linux_msync(struct thread *td, struct linux_msync_args *args)
629 {
630 struct msync_args bsd_args;
631
632 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
633 bsd_args.len = (uintptr_t)args->len;
634 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
635
636 return msync(td, &bsd_args);
637 }
638
639 int
640 linux_time(struct thread *td, struct linux_time_args *args)
641 {
642 struct timeval tv;
643 l_time_t tm;
644 int error;
645
646 #ifdef DEBUG
647 if (ldebug(time))
648 printf(ARGS(time, "*"));
649 #endif
650
651 microtime(&tv);
652 tm = tv.tv_sec;
653 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
654 return error;
655 td->td_retval[0] = tm;
656 return 0;
657 }
658
659 struct l_times_argv {
660 l_long tms_utime;
661 l_long tms_stime;
662 l_long tms_cutime;
663 l_long tms_cstime;
664 };
665
666 #define CLK_TCK 100 /* Linux uses 100 */
667
668 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
669
670 int
671 linux_times(struct thread *td, struct linux_times_args *args)
672 {
673 struct timeval tv, utime, stime, cutime, cstime;
674 struct l_times_argv tms;
675 struct proc *p;
676 int error;
677
678 #ifdef DEBUG
679 if (ldebug(times))
680 printf(ARGS(times, "*"));
681 #endif
682
683 if (args->buf != NULL) {
684 p = td->td_proc;
685 PROC_LOCK(p);
686 PROC_SLOCK(p);
687 calcru(p, &utime, &stime);
688 PROC_SUNLOCK(p);
689 calccru(p, &cutime, &cstime);
690 PROC_UNLOCK(p);
691
692 tms.tms_utime = CONVTCK(utime);
693 tms.tms_stime = CONVTCK(stime);
694
695 tms.tms_cutime = CONVTCK(cutime);
696 tms.tms_cstime = CONVTCK(cstime);
697
698 if ((error = copyout(&tms, args->buf, sizeof(tms))))
699 return error;
700 }
701
702 microuptime(&tv);
703 td->td_retval[0] = (int)CONVTCK(tv);
704 return 0;
705 }
706
707 int
708 linux_newuname(struct thread *td, struct linux_newuname_args *args)
709 {
710 INIT_VPROCG(TD_TO_VPROCG(td));
711 struct l_new_utsname utsname;
712 char osname[LINUX_MAX_UTSNAME];
713 char osrelease[LINUX_MAX_UTSNAME];
714 char *p;
715
716 #ifdef DEBUG
717 if (ldebug(newuname))
718 printf(ARGS(newuname, "*"));
719 #endif
720
721 linux_get_osname(td, osname);
722 linux_get_osrelease(td, osrelease);
723
724 bzero(&utsname, sizeof(utsname));
725 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
726 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
727 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
728 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
729 for (p = utsname.version; *p != '\0'; ++p)
730 if (*p == '\n') {
731 *p = '\0';
732 break;
733 }
734 #ifdef __i386__
735 {
736 const char *class;
737
738 switch (cpu_class) {
739 case CPUCLASS_686:
740 class = "i686";
741 break;
742 case CPUCLASS_586:
743 class = "i586";
744 break;
745 case CPUCLASS_486:
746 class = "i486";
747 break;
748 default:
749 class = "i386";
750 }
751 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME);
752 }
753 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */
754 #ifdef COMPAT_LINUX32
755 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME);
756 #else
757 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME);
758 #endif /* COMPAT_LINUX32 */
759 #else /* something other than i386 or amd64 - assume we and Linux agree */
760 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME);
761 #endif /* __i386__ */
762 mtx_lock(&hostname_mtx);
763 strlcpy(utsname.domainname, V_domainname, LINUX_MAX_UTSNAME);
764 mtx_unlock(&hostname_mtx);
765
766 return (copyout(&utsname, args->buf, sizeof(utsname)));
767 }
768
769 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
770 struct l_utimbuf {
771 l_time_t l_actime;
772 l_time_t l_modtime;
773 };
774
775 int
776 linux_utime(struct thread *td, struct linux_utime_args *args)
777 {
778 struct timeval tv[2], *tvp;
779 struct l_utimbuf lut;
780 char *fname;
781 int error;
782
783 LCONVPATHEXIST(td, args->fname, &fname);
784
785 #ifdef DEBUG
786 if (ldebug(utime))
787 printf(ARGS(utime, "%s, *"), fname);
788 #endif
789
790 if (args->times) {
791 if ((error = copyin(args->times, &lut, sizeof lut))) {
792 LFREEPATH(fname);
793 return error;
794 }
795 tv[0].tv_sec = lut.l_actime;
796 tv[0].tv_usec = 0;
797 tv[1].tv_sec = lut.l_modtime;
798 tv[1].tv_usec = 0;
799 tvp = tv;
800 } else
801 tvp = NULL;
802
803 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
804 LFREEPATH(fname);
805 return (error);
806 }
807
808 int
809 linux_utimes(struct thread *td, struct linux_utimes_args *args)
810 {
811 l_timeval ltv[2];
812 struct timeval tv[2], *tvp = NULL;
813 char *fname;
814 int error;
815
816 LCONVPATHEXIST(td, args->fname, &fname);
817
818 #ifdef DEBUG
819 if (ldebug(utimes))
820 printf(ARGS(utimes, "%s, *"), fname);
821 #endif
822
823 if (args->tptr != NULL) {
824 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
825 LFREEPATH(fname);
826 return (error);
827 }
828 tv[0].tv_sec = ltv[0].tv_sec;
829 tv[0].tv_usec = ltv[0].tv_usec;
830 tv[1].tv_sec = ltv[1].tv_sec;
831 tv[1].tv_usec = ltv[1].tv_usec;
832 tvp = tv;
833 }
834
835 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
836 LFREEPATH(fname);
837 return (error);
838 }
839
840 int
841 linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
842 {
843 l_timeval ltv[2];
844 struct timeval tv[2], *tvp = NULL;
845 char *fname;
846 int error, dfd;
847
848 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
849 LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
850
851 #ifdef DEBUG
852 if (ldebug(futimesat))
853 printf(ARGS(futimesat, "%s, *"), fname);
854 #endif
855
856 if (args->utimes != NULL) {
857 if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
858 LFREEPATH(fname);
859 return (error);
860 }
861 tv[0].tv_sec = ltv[0].tv_sec;
862 tv[0].tv_usec = ltv[0].tv_usec;
863 tv[1].tv_sec = ltv[1].tv_sec;
864 tv[1].tv_usec = ltv[1].tv_usec;
865 tvp = tv;
866 }
867
868 error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
869 LFREEPATH(fname);
870 return (error);
871 }
872 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
873
874 #define __WCLONE 0x80000000
875
876 int
877 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
878 {
879 int error, options, tmpstat;
880
881 #ifdef DEBUG
882 if (ldebug(waitpid))
883 printf(ARGS(waitpid, "%d, %p, %d"),
884 args->pid, (void *)args->status, args->options);
885 #endif
886 /*
887 * this is necessary because the test in kern_wait doesn't work
888 * because we mess with the options here
889 */
890 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
891 return (EINVAL);
892
893 options = (args->options & (WNOHANG | WUNTRACED));
894 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
895 if (args->options & __WCLONE)
896 options |= WLINUXCLONE;
897
898 error = kern_wait(td, args->pid, &tmpstat, options, NULL);
899 if (error)
900 return error;
901
902 if (args->status) {
903 tmpstat &= 0xffff;
904 if (WIFSIGNALED(tmpstat))
905 tmpstat = (tmpstat & 0xffffff80) |
906 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
907 else if (WIFSTOPPED(tmpstat))
908 tmpstat = (tmpstat & 0xffff00ff) |
909 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
910 return copyout(&tmpstat, args->status, sizeof(int));
911 }
912
913 return 0;
914 }
915
916 int
917 linux_wait4(struct thread *td, struct linux_wait4_args *args)
918 {
919 int error, options, tmpstat;
920 struct rusage ru, *rup;
921 struct proc *p;
922
923 #ifdef DEBUG
924 if (ldebug(wait4))
925 printf(ARGS(wait4, "%d, %p, %d, %p"),
926 args->pid, (void *)args->status, args->options,
927 (void *)args->rusage);
928 #endif
929
930 options = (args->options & (WNOHANG | WUNTRACED));
931 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
932 if (args->options & __WCLONE)
933 options |= WLINUXCLONE;
934
935 if (args->rusage != NULL)
936 rup = &ru;
937 else
938 rup = NULL;
939 error = kern_wait(td, args->pid, &tmpstat, options, rup);
940 if (error)
941 return error;
942
943 p = td->td_proc;
944 PROC_LOCK(p);
945 sigqueue_delete(&p->p_sigqueue, SIGCHLD);
946 PROC_UNLOCK(p);
947
948 if (args->status) {
949 tmpstat &= 0xffff;
950 if (WIFSIGNALED(tmpstat))
951 tmpstat = (tmpstat & 0xffffff80) |
952 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
953 else if (WIFSTOPPED(tmpstat))
954 tmpstat = (tmpstat & 0xffff00ff) |
955 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
956 error = copyout(&tmpstat, args->status, sizeof(int));
957 }
958 if (args->rusage != NULL && error == 0)
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