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