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[deliverable/linux.git] / arch / sparc64 / kernel / sys_sparc32.c
1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
2 *
3 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
5 *
6 * These routines maintain argument size conversion between 32bit and 64bit
7 * environment.
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/capability.h>
13 #include <linux/fs.h>
14 #include <linux/mm.h>
15 #include <linux/file.h>
16 #include <linux/signal.h>
17 #include <linux/resource.h>
18 #include <linux/times.h>
19 #include <linux/utsname.h>
20 #include <linux/smp.h>
21 #include <linux/smp_lock.h>
22 #include <linux/sem.h>
23 #include <linux/msg.h>
24 #include <linux/shm.h>
25 #include <linux/slab.h>
26 #include <linux/uio.h>
27 #include <linux/nfs_fs.h>
28 #include <linux/quota.h>
29 #include <linux/module.h>
30 #include <linux/sunrpc/svc.h>
31 #include <linux/nfsd/nfsd.h>
32 #include <linux/nfsd/cache.h>
33 #include <linux/nfsd/xdr.h>
34 #include <linux/nfsd/syscall.h>
35 #include <linux/poll.h>
36 #include <linux/personality.h>
37 #include <linux/stat.h>
38 #include <linux/filter.h>
39 #include <linux/highmem.h>
40 #include <linux/highuid.h>
41 #include <linux/mman.h>
42 #include <linux/ipv6.h>
43 #include <linux/in.h>
44 #include <linux/icmpv6.h>
45 #include <linux/syscalls.h>
46 #include <linux/sysctl.h>
47 #include <linux/binfmts.h>
48 #include <linux/dnotify.h>
49 #include <linux/security.h>
50 #include <linux/compat.h>
51 #include <linux/vfs.h>
52 #include <linux/netfilter_ipv4/ip_tables.h>
53 #include <linux/ptrace.h>
54 #include <linux/highuid.h>
55
56 #include <asm/types.h>
57 #include <asm/ipc.h>
58 #include <asm/uaccess.h>
59 #include <asm/fpumacro.h>
60 #include <asm/semaphore.h>
61 #include <asm/mmu_context.h>
62 #include <asm/a.out.h>
63 #include <asm/compat_signal.h>
64
65 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
66 {
67 return sys_chown(filename, low2highuid(user), low2highgid(group));
68 }
69
70 asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
71 {
72 return sys_lchown(filename, low2highuid(user), low2highgid(group));
73 }
74
75 asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
76 {
77 return sys_fchown(fd, low2highuid(user), low2highgid(group));
78 }
79
80 asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
81 {
82 return sys_setregid(low2highgid(rgid), low2highgid(egid));
83 }
84
85 asmlinkage long sys32_setgid16(u16 gid)
86 {
87 return sys_setgid((gid_t)gid);
88 }
89
90 asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
91 {
92 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
93 }
94
95 asmlinkage long sys32_setuid16(u16 uid)
96 {
97 return sys_setuid((uid_t)uid);
98 }
99
100 asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
101 {
102 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
103 low2highuid(suid));
104 }
105
106 asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
107 {
108 int retval;
109
110 if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
111 !(retval = put_user(high2lowuid(current->euid), euid)))
112 retval = put_user(high2lowuid(current->suid), suid);
113
114 return retval;
115 }
116
117 asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
118 {
119 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
120 low2highgid(sgid));
121 }
122
123 asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
124 {
125 int retval;
126
127 if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
128 !(retval = put_user(high2lowgid(current->egid), egid)))
129 retval = put_user(high2lowgid(current->sgid), sgid);
130
131 return retval;
132 }
133
134 asmlinkage long sys32_setfsuid16(u16 uid)
135 {
136 return sys_setfsuid((uid_t)uid);
137 }
138
139 asmlinkage long sys32_setfsgid16(u16 gid)
140 {
141 return sys_setfsgid((gid_t)gid);
142 }
143
144 static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
145 {
146 int i;
147 u16 group;
148
149 for (i = 0; i < group_info->ngroups; i++) {
150 group = (u16)GROUP_AT(group_info, i);
151 if (put_user(group, grouplist+i))
152 return -EFAULT;
153 }
154
155 return 0;
156 }
157
158 static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
159 {
160 int i;
161 u16 group;
162
163 for (i = 0; i < group_info->ngroups; i++) {
164 if (get_user(group, grouplist+i))
165 return -EFAULT;
166 GROUP_AT(group_info, i) = (gid_t)group;
167 }
168
169 return 0;
170 }
171
172 asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
173 {
174 int i;
175
176 if (gidsetsize < 0)
177 return -EINVAL;
178
179 get_group_info(current->group_info);
180 i = current->group_info->ngroups;
181 if (gidsetsize) {
182 if (i > gidsetsize) {
183 i = -EINVAL;
184 goto out;
185 }
186 if (groups16_to_user(grouplist, current->group_info)) {
187 i = -EFAULT;
188 goto out;
189 }
190 }
191 out:
192 put_group_info(current->group_info);
193 return i;
194 }
195
196 asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
197 {
198 struct group_info *group_info;
199 int retval;
200
201 if (!capable(CAP_SETGID))
202 return -EPERM;
203 if ((unsigned)gidsetsize > NGROUPS_MAX)
204 return -EINVAL;
205
206 group_info = groups_alloc(gidsetsize);
207 if (!group_info)
208 return -ENOMEM;
209 retval = groups16_from_user(group_info, grouplist);
210 if (retval) {
211 put_group_info(group_info);
212 return retval;
213 }
214
215 retval = set_current_groups(group_info);
216 put_group_info(group_info);
217
218 return retval;
219 }
220
221 asmlinkage long sys32_getuid16(void)
222 {
223 return high2lowuid(current->uid);
224 }
225
226 asmlinkage long sys32_geteuid16(void)
227 {
228 return high2lowuid(current->euid);
229 }
230
231 asmlinkage long sys32_getgid16(void)
232 {
233 return high2lowgid(current->gid);
234 }
235
236 asmlinkage long sys32_getegid16(void)
237 {
238 return high2lowgid(current->egid);
239 }
240
241 /* 32-bit timeval and related flotsam. */
242
243 static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
244 {
245 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
246 (__get_user(o->tv_sec, &i->tv_sec) |
247 __get_user(o->tv_usec, &i->tv_usec)));
248 }
249
250 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
251 {
252 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
253 (__put_user(i->tv_sec, &o->tv_sec) |
254 __put_user(i->tv_usec, &o->tv_usec)));
255 }
256
257 #ifdef CONFIG_SYSVIPC
258 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
259 {
260 int version;
261
262 version = call >> 16; /* hack for backward compatibility */
263 call &= 0xffff;
264
265 switch (call) {
266 case SEMTIMEDOP:
267 if (fifth)
268 /* sign extend semid */
269 return compat_sys_semtimedop((int)first,
270 compat_ptr(ptr), second,
271 compat_ptr(fifth));
272 /* else fall through for normal semop() */
273 case SEMOP:
274 /* struct sembuf is the same on 32 and 64bit :)) */
275 /* sign extend semid */
276 return sys_semtimedop((int)first, compat_ptr(ptr), second,
277 NULL);
278 case SEMGET:
279 /* sign extend key, nsems */
280 return sys_semget((int)first, (int)second, third);
281 case SEMCTL:
282 /* sign extend semid, semnum */
283 return compat_sys_semctl((int)first, (int)second, third,
284 compat_ptr(ptr));
285
286 case MSGSND:
287 /* sign extend msqid */
288 return compat_sys_msgsnd((int)first, (int)second, third,
289 compat_ptr(ptr));
290 case MSGRCV:
291 /* sign extend msqid, msgtyp */
292 return compat_sys_msgrcv((int)first, second, (int)fifth,
293 third, version, compat_ptr(ptr));
294 case MSGGET:
295 /* sign extend key */
296 return sys_msgget((int)first, second);
297 case MSGCTL:
298 /* sign extend msqid */
299 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
300
301 case SHMAT:
302 /* sign extend shmid */
303 return compat_sys_shmat((int)first, second, third, version,
304 compat_ptr(ptr));
305 case SHMDT:
306 return sys_shmdt(compat_ptr(ptr));
307 case SHMGET:
308 /* sign extend key_t */
309 return sys_shmget((int)first, second, third);
310 case SHMCTL:
311 /* sign extend shmid */
312 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
313
314 default:
315 return -ENOSYS;
316 };
317
318 return -ENOSYS;
319 }
320 #endif
321
322 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
323 {
324 if ((int)high < 0)
325 return -EINVAL;
326 else
327 return sys_truncate(path, (high << 32) | low);
328 }
329
330 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
331 {
332 if ((int)high < 0)
333 return -EINVAL;
334 else
335 return sys_ftruncate(fd, (high << 32) | low);
336 }
337
338 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
339 {
340 compat_ino_t ino;
341 int err;
342
343 if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
344 !old_valid_dev(stat->rdev))
345 return -EOVERFLOW;
346
347 ino = stat->ino;
348 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
349 return -EOVERFLOW;
350
351 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
352 err |= put_user(stat->ino, &statbuf->st_ino);
353 err |= put_user(stat->mode, &statbuf->st_mode);
354 err |= put_user(stat->nlink, &statbuf->st_nlink);
355 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
356 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
357 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
358 err |= put_user(stat->size, &statbuf->st_size);
359 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
360 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
361 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
362 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
363 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
364 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
365 err |= put_user(stat->blksize, &statbuf->st_blksize);
366 err |= put_user(stat->blocks, &statbuf->st_blocks);
367 err |= put_user(0, &statbuf->__unused4[0]);
368 err |= put_user(0, &statbuf->__unused4[1]);
369
370 return err;
371 }
372
373 int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
374 {
375 int err;
376
377 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
378 err |= put_user(stat->ino, &statbuf->st_ino);
379 err |= put_user(stat->mode, &statbuf->st_mode);
380 err |= put_user(stat->nlink, &statbuf->st_nlink);
381 err |= put_user(stat->uid, &statbuf->st_uid);
382 err |= put_user(stat->gid, &statbuf->st_gid);
383 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
384 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
385 err |= put_user(stat->size, &statbuf->st_size);
386 err |= put_user(stat->blksize, &statbuf->st_blksize);
387 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
388 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
389 err |= put_user(stat->blocks, &statbuf->st_blocks);
390 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
391 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
392 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
393 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
394 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
395 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
396 err |= put_user(0, &statbuf->__unused4);
397 err |= put_user(0, &statbuf->__unused5);
398
399 return err;
400 }
401
402 asmlinkage long compat_sys_stat64(char __user * filename,
403 struct compat_stat64 __user *statbuf)
404 {
405 struct kstat stat;
406 int error = vfs_stat(filename, &stat);
407
408 if (!error)
409 error = cp_compat_stat64(&stat, statbuf);
410 return error;
411 }
412
413 asmlinkage long compat_sys_lstat64(char __user * filename,
414 struct compat_stat64 __user *statbuf)
415 {
416 struct kstat stat;
417 int error = vfs_lstat(filename, &stat);
418
419 if (!error)
420 error = cp_compat_stat64(&stat, statbuf);
421 return error;
422 }
423
424 asmlinkage long compat_sys_fstat64(unsigned int fd,
425 struct compat_stat64 __user * statbuf)
426 {
427 struct kstat stat;
428 int error = vfs_fstat(fd, &stat);
429
430 if (!error)
431 error = cp_compat_stat64(&stat, statbuf);
432 return error;
433 }
434
435 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
436 struct compat_stat64 __user * statbuf, int flag)
437 {
438 struct kstat stat;
439 int error = -EINVAL;
440
441 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
442 goto out;
443
444 if (flag & AT_SYMLINK_NOFOLLOW)
445 error = vfs_lstat_fd(dfd, filename, &stat);
446 else
447 error = vfs_stat_fd(dfd, filename, &stat);
448
449 if (!error)
450 error = cp_compat_stat64(&stat, statbuf);
451
452 out:
453 return error;
454 }
455
456 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
457 {
458 return sys_sysfs(option, arg1, arg2);
459 }
460
461 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
462 {
463 struct timespec t;
464 int ret;
465 mm_segment_t old_fs = get_fs ();
466
467 set_fs (KERNEL_DS);
468 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
469 set_fs (old_fs);
470 if (put_compat_timespec(&t, interval))
471 return -EFAULT;
472 return ret;
473 }
474
475 asmlinkage long compat_sys_rt_sigprocmask(int how,
476 compat_sigset_t __user *set,
477 compat_sigset_t __user *oset,
478 compat_size_t sigsetsize)
479 {
480 sigset_t s;
481 compat_sigset_t s32;
482 int ret;
483 mm_segment_t old_fs = get_fs();
484
485 if (set) {
486 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
487 return -EFAULT;
488 switch (_NSIG_WORDS) {
489 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
490 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
491 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
492 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
493 }
494 }
495 set_fs (KERNEL_DS);
496 ret = sys_rt_sigprocmask(how,
497 set ? (sigset_t __user *) &s : NULL,
498 oset ? (sigset_t __user *) &s : NULL,
499 sigsetsize);
500 set_fs (old_fs);
501 if (ret) return ret;
502 if (oset) {
503 switch (_NSIG_WORDS) {
504 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
505 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
506 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
507 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
508 }
509 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
510 return -EFAULT;
511 }
512 return 0;
513 }
514
515 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
516 compat_size_t sigsetsize)
517 {
518 sigset_t s;
519 compat_sigset_t s32;
520 int ret;
521 mm_segment_t old_fs = get_fs();
522
523 set_fs (KERNEL_DS);
524 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
525 set_fs (old_fs);
526 if (!ret) {
527 switch (_NSIG_WORDS) {
528 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
529 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
530 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
531 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
532 }
533 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
534 return -EFAULT;
535 }
536 return ret;
537 }
538
539 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
540 struct compat_siginfo __user *uinfo)
541 {
542 siginfo_t info;
543 int ret;
544 mm_segment_t old_fs = get_fs();
545
546 if (copy_siginfo_from_user32(&info, uinfo))
547 return -EFAULT;
548
549 set_fs (KERNEL_DS);
550 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
551 set_fs (old_fs);
552 return ret;
553 }
554
555 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
556 struct old_sigaction32 __user *oact)
557 {
558 struct k_sigaction new_ka, old_ka;
559 int ret;
560
561 if (sig < 0) {
562 set_thread_flag(TIF_NEWSIGNALS);
563 sig = -sig;
564 }
565
566 if (act) {
567 compat_old_sigset_t mask;
568 u32 u_handler, u_restorer;
569
570 ret = get_user(u_handler, &act->sa_handler);
571 new_ka.sa.sa_handler = compat_ptr(u_handler);
572 ret |= __get_user(u_restorer, &act->sa_restorer);
573 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
574 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
575 ret |= __get_user(mask, &act->sa_mask);
576 if (ret)
577 return ret;
578 new_ka.ka_restorer = NULL;
579 siginitset(&new_ka.sa.sa_mask, mask);
580 }
581
582 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
583
584 if (!ret && oact) {
585 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
586 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
587 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
588 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
589 }
590
591 return ret;
592 }
593
594 asmlinkage long compat_sys_rt_sigaction(int sig,
595 struct sigaction32 __user *act,
596 struct sigaction32 __user *oact,
597 void __user *restorer,
598 compat_size_t sigsetsize)
599 {
600 struct k_sigaction new_ka, old_ka;
601 int ret;
602 compat_sigset_t set32;
603
604 /* XXX: Don't preclude handling different sized sigset_t's. */
605 if (sigsetsize != sizeof(compat_sigset_t))
606 return -EINVAL;
607
608 /* All tasks which use RT signals (effectively) use
609 * new style signals.
610 */
611 set_thread_flag(TIF_NEWSIGNALS);
612
613 if (act) {
614 u32 u_handler, u_restorer;
615
616 new_ka.ka_restorer = restorer;
617 ret = get_user(u_handler, &act->sa_handler);
618 new_ka.sa.sa_handler = compat_ptr(u_handler);
619 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
620 switch (_NSIG_WORDS) {
621 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
622 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
623 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
624 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
625 }
626 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
627 ret |= __get_user(u_restorer, &act->sa_restorer);
628 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
629 if (ret)
630 return -EFAULT;
631 }
632
633 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
634
635 if (!ret && oact) {
636 switch (_NSIG_WORDS) {
637 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
638 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
639 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
640 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
641 }
642 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
643 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
644 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
645 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
646 if (ret)
647 ret = -EFAULT;
648 }
649
650 return ret;
651 }
652
653 /*
654 * sparc32_execve() executes a new program after the asm stub has set
655 * things up for us. This should basically do what I want it to.
656 */
657 asmlinkage long sparc32_execve(struct pt_regs *regs)
658 {
659 int error, base = 0;
660 char *filename;
661
662 /* User register window flush is done by entry.S */
663
664 /* Check for indirect call. */
665 if ((u32)regs->u_regs[UREG_G1] == 0)
666 base = 1;
667
668 filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
669 error = PTR_ERR(filename);
670 if (IS_ERR(filename))
671 goto out;
672
673 error = compat_do_execve(filename,
674 compat_ptr(regs->u_regs[base + UREG_I1]),
675 compat_ptr(regs->u_regs[base + UREG_I2]), regs);
676
677 putname(filename);
678
679 if (!error) {
680 fprs_write(0);
681 current_thread_info()->xfsr[0] = 0;
682 current_thread_info()->fpsaved[0] = 0;
683 regs->tstate &= ~TSTATE_PEF;
684 task_lock(current);
685 current->ptrace &= ~PT_DTRACE;
686 task_unlock(current);
687 }
688 out:
689 return error;
690 }
691
692 #ifdef CONFIG_MODULES
693
694 asmlinkage long sys32_init_module(void __user *umod, u32 len,
695 const char __user *uargs)
696 {
697 return sys_init_module(umod, len, uargs);
698 }
699
700 asmlinkage long sys32_delete_module(const char __user *name_user,
701 unsigned int flags)
702 {
703 return sys_delete_module(name_user, flags);
704 }
705
706 #else /* CONFIG_MODULES */
707
708 asmlinkage long sys32_init_module(const char __user *name_user,
709 struct module __user *mod_user)
710 {
711 return -ENOSYS;
712 }
713
714 asmlinkage long sys32_delete_module(const char __user *name_user)
715 {
716 return -ENOSYS;
717 }
718
719 #endif /* CONFIG_MODULES */
720
721 /* Translations due to time_t size differences. Which affects all
722 sorts of things, like timeval and itimerval. */
723
724 extern struct timezone sys_tz;
725
726 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
727 struct timezone __user *tz)
728 {
729 if (tv) {
730 struct timeval ktv;
731 do_gettimeofday(&ktv);
732 if (put_tv32(tv, &ktv))
733 return -EFAULT;
734 }
735 if (tz) {
736 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
737 return -EFAULT;
738 }
739 return 0;
740 }
741
742 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
743 {
744 long usec;
745
746 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
747 return -EFAULT;
748 if (__get_user(o->tv_sec, &i->tv_sec))
749 return -EFAULT;
750 if (__get_user(usec, &i->tv_usec))
751 return -EFAULT;
752 o->tv_nsec = usec * 1000;
753 return 0;
754 }
755
756 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
757 struct timezone __user *tz)
758 {
759 struct timespec kts;
760 struct timezone ktz;
761
762 if (tv) {
763 if (get_ts32(&kts, tv))
764 return -EFAULT;
765 }
766 if (tz) {
767 if (copy_from_user(&ktz, tz, sizeof(ktz)))
768 return -EFAULT;
769 }
770
771 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
772 }
773
774 asmlinkage long sys32_utimes(char __user *filename,
775 struct compat_timeval __user *tvs)
776 {
777 struct timespec tv[2];
778
779 if (tvs) {
780 struct timeval ktvs[2];
781 if (get_tv32(&ktvs[0], tvs) ||
782 get_tv32(&ktvs[1], 1+tvs))
783 return -EFAULT;
784
785 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
786 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
787 return -EINVAL;
788
789 tv[0].tv_sec = ktvs[0].tv_sec;
790 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
791 tv[1].tv_sec = ktvs[1].tv_sec;
792 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
793 }
794
795 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
796 }
797
798 /* These are here just in case some old sparc32 binary calls it. */
799 asmlinkage long sys32_pause(void)
800 {
801 current->state = TASK_INTERRUPTIBLE;
802 schedule();
803 return -ERESTARTNOHAND;
804 }
805
806 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
807 char __user *ubuf,
808 compat_size_t count,
809 unsigned long poshi,
810 unsigned long poslo)
811 {
812 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
813 }
814
815 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
816 char __user *ubuf,
817 compat_size_t count,
818 unsigned long poshi,
819 unsigned long poslo)
820 {
821 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
822 }
823
824 asmlinkage long compat_sys_readahead(int fd,
825 unsigned long offhi,
826 unsigned long offlo,
827 compat_size_t count)
828 {
829 return sys_readahead(fd, (offhi << 32) | offlo, count);
830 }
831
832 long compat_sys_fadvise64(int fd,
833 unsigned long offhi,
834 unsigned long offlo,
835 compat_size_t len, int advice)
836 {
837 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
838 }
839
840 long compat_sys_fadvise64_64(int fd,
841 unsigned long offhi, unsigned long offlo,
842 unsigned long lenhi, unsigned long lenlo,
843 int advice)
844 {
845 return sys_fadvise64_64(fd,
846 (offhi << 32) | offlo,
847 (lenhi << 32) | lenlo,
848 advice);
849 }
850
851 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
852 compat_off_t __user *offset,
853 compat_size_t count)
854 {
855 mm_segment_t old_fs = get_fs();
856 int ret;
857 off_t of;
858
859 if (offset && get_user(of, offset))
860 return -EFAULT;
861
862 set_fs(KERNEL_DS);
863 ret = sys_sendfile(out_fd, in_fd,
864 offset ? (off_t __user *) &of : NULL,
865 count);
866 set_fs(old_fs);
867
868 if (offset && put_user(of, offset))
869 return -EFAULT;
870
871 return ret;
872 }
873
874 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
875 compat_loff_t __user *offset,
876 compat_size_t count)
877 {
878 mm_segment_t old_fs = get_fs();
879 int ret;
880 loff_t lof;
881
882 if (offset && get_user(lof, offset))
883 return -EFAULT;
884
885 set_fs(KERNEL_DS);
886 ret = sys_sendfile64(out_fd, in_fd,
887 offset ? (loff_t __user *) &lof : NULL,
888 count);
889 set_fs(old_fs);
890
891 if (offset && put_user(lof, offset))
892 return -EFAULT;
893
894 return ret;
895 }
896
897 /* This is just a version for 32-bit applications which does
898 * not force O_LARGEFILE on.
899 */
900
901 asmlinkage long sparc32_open(const char __user *filename,
902 int flags, int mode)
903 {
904 return do_sys_open(AT_FDCWD, filename, flags, mode);
905 }
906
907 extern unsigned long do_mremap(unsigned long addr,
908 unsigned long old_len, unsigned long new_len,
909 unsigned long flags, unsigned long new_addr);
910
911 asmlinkage unsigned long sys32_mremap(unsigned long addr,
912 unsigned long old_len, unsigned long new_len,
913 unsigned long flags, u32 __new_addr)
914 {
915 struct vm_area_struct *vma;
916 unsigned long ret = -EINVAL;
917 unsigned long new_addr = __new_addr;
918
919 if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
920 goto out;
921 if (addr > STACK_TOP32 - old_len)
922 goto out;
923 down_write(&current->mm->mmap_sem);
924 if (flags & MREMAP_FIXED) {
925 if (new_addr > STACK_TOP32 - new_len)
926 goto out_sem;
927 } else if (addr > STACK_TOP32 - new_len) {
928 unsigned long map_flags = 0;
929 struct file *file = NULL;
930
931 ret = -ENOMEM;
932 if (!(flags & MREMAP_MAYMOVE))
933 goto out_sem;
934
935 vma = find_vma(current->mm, addr);
936 if (vma) {
937 if (vma->vm_flags & VM_SHARED)
938 map_flags |= MAP_SHARED;
939 file = vma->vm_file;
940 }
941
942 /* MREMAP_FIXED checked above. */
943 new_addr = get_unmapped_area(file, addr, new_len,
944 vma ? vma->vm_pgoff : 0,
945 map_flags);
946 ret = new_addr;
947 if (new_addr & ~PAGE_MASK)
948 goto out_sem;
949 flags |= MREMAP_FIXED;
950 }
951 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
952 out_sem:
953 up_write(&current->mm->mmap_sem);
954 out:
955 return ret;
956 }
957
958 struct __sysctl_args32 {
959 u32 name;
960 int nlen;
961 u32 oldval;
962 u32 oldlenp;
963 u32 newval;
964 u32 newlen;
965 u32 __unused[4];
966 };
967
968 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
969 {
970 #ifndef CONFIG_SYSCTL_SYSCALL
971 return -ENOSYS;
972 #else
973 struct __sysctl_args32 tmp;
974 int error;
975 size_t oldlen, __user *oldlenp = NULL;
976 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
977
978 if (copy_from_user(&tmp, args, sizeof(tmp)))
979 return -EFAULT;
980
981 if (tmp.oldval && tmp.oldlenp) {
982 /* Duh, this is ugly and might not work if sysctl_args
983 is in read-only memory, but do_sysctl does indirectly
984 a lot of uaccess in both directions and we'd have to
985 basically copy the whole sysctl.c here, and
986 glibc's __sysctl uses rw memory for the structure
987 anyway. */
988 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
989 put_user(oldlen, (size_t __user *)addr))
990 return -EFAULT;
991 oldlenp = (size_t __user *)addr;
992 }
993
994 lock_kernel();
995 error = do_sysctl((int __user *)(unsigned long) tmp.name,
996 tmp.nlen,
997 (void __user *)(unsigned long) tmp.oldval,
998 oldlenp,
999 (void __user *)(unsigned long) tmp.newval,
1000 tmp.newlen);
1001 unlock_kernel();
1002 if (oldlenp) {
1003 if (!error) {
1004 if (get_user(oldlen, (size_t __user *)addr) ||
1005 put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1006 error = -EFAULT;
1007 }
1008 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1009 error = -EFAULT;
1010 }
1011 return error;
1012 #endif
1013 }
1014
1015 long sys32_lookup_dcookie(unsigned long cookie_high,
1016 unsigned long cookie_low,
1017 char __user *buf, size_t len)
1018 {
1019 return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1020 buf, len);
1021 }
1022
1023 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
1024 {
1025 return sys_sync_file_range(fd,
1026 (off_high << 32) | off_low,
1027 (nb_high << 32) | nb_low,
1028 flags);
1029 }
1030
1031 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
1032 u32 lenhi, u32 lenlo)
1033 {
1034 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
1035 ((loff_t)lenhi << 32) | lenlo);
1036 }
Linux kernel - Deliverables
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