summaryrefslogtreecommitdiff
path: root/arch/sparc64/kernel/sys_sparc32.c
blob: ba5bd626b39e39a263a2aec0a1b6939ea0d70c94 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/capability.h>
#include <linux/fs.h> 
#include <linux/mm.h> 
#include <linux/file.h> 
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/quota.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/filter.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/ipv6.h>
#include <linux/in.h>
#include <linux/icmpv6.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/binfmts.h>
#include <linux/dnotify.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/ptrace.h>

#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/fpumacro.h>
#include <asm/mmu_context.h>
#include <asm/compat_signal.h>

asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
{
	return sys_chown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
{
	return sys_lchown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
{
	return sys_fchown(fd, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
{
	return sys_setregid(low2highgid(rgid), low2highgid(egid));
}

asmlinkage long sys32_setgid16(u16 gid)
{
	return sys_setgid((gid_t)gid);
}

asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
{
	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
}

asmlinkage long sys32_setuid16(u16 uid)
{
	return sys_setuid((uid_t)uid);
}

asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
{
	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
		low2highuid(suid));
}

asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
{
	int retval;

	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
	    !(retval = put_user(high2lowuid(current->euid), euid)))
		retval = put_user(high2lowuid(current->suid), suid);

	return retval;
}

asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
{
	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
		low2highgid(sgid));
}

asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
{
	int retval;

	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
	    !(retval = put_user(high2lowgid(current->egid), egid)))
		retval = put_user(high2lowgid(current->sgid), sgid);

	return retval;
}

asmlinkage long sys32_setfsuid16(u16 uid)
{
	return sys_setfsuid((uid_t)uid);
}

asmlinkage long sys32_setfsgid16(u16 gid)
{
	return sys_setfsgid((gid_t)gid);
}

static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
{
	int i;
	u16 group;

	for (i = 0; i < group_info->ngroups; i++) {
		group = (u16)GROUP_AT(group_info, i);
		if (put_user(group, grouplist+i))
			return -EFAULT;
	}

	return 0;
}

static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
{
	int i;
	u16 group;

	for (i = 0; i < group_info->ngroups; i++) {
		if (get_user(group, grouplist+i))
			return  -EFAULT;
		GROUP_AT(group_info, i) = (gid_t)group;
	}

	return 0;
}

asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
{
	int i;

	if (gidsetsize < 0)
		return -EINVAL;

	get_group_info(current->group_info);
	i = current->group_info->ngroups;
	if (gidsetsize) {
		if (i > gidsetsize) {
			i = -EINVAL;
			goto out;
		}
		if (groups16_to_user(grouplist, current->group_info)) {
			i = -EFAULT;
			goto out;
		}
	}
out:
	put_group_info(current->group_info);
	return i;
}

asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
{
	struct group_info *group_info;
	int retval;

	if (!capable(CAP_SETGID))
		return -EPERM;
	if ((unsigned)gidsetsize > NGROUPS_MAX)
		return -EINVAL;

	group_info = groups_alloc(gidsetsize);
	if (!group_info)
		return -ENOMEM;
	retval = groups16_from_user(group_info, grouplist);
	if (retval) {
		put_group_info(group_info);
		return retval;
	}

	retval = set_current_groups(group_info);
	put_group_info(group_info);

	return retval;
}

asmlinkage long sys32_getuid16(void)
{
	return high2lowuid(current->uid);
}

asmlinkage long sys32_geteuid16(void)
{
	return high2lowuid(current->euid);
}

asmlinkage long sys32_getgid16(void)
{
	return high2lowgid(current->gid);
}

asmlinkage long sys32_getegid16(void)
{
	return high2lowgid(current->egid);
}

/* 32-bit timeval and related flotsam.  */

static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
{
	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
		(__put_user(i->tv_sec, &o->tv_sec) |
		 __put_user(i->tv_usec, &o->tv_usec)));
}

#ifdef CONFIG_SYSVIPC                                                        
asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
{
	int version;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	switch (call) {
	case SEMTIMEDOP:
		if (fifth)
			/* sign extend semid */
			return compat_sys_semtimedop((int)first,
						     compat_ptr(ptr), second,
						     compat_ptr(fifth));
		/* else fall through for normal semop() */
	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		/* sign extend semid */
		return sys_semtimedop((int)first, compat_ptr(ptr), second,
				      NULL);
	case SEMGET:
		/* sign extend key, nsems */
		return sys_semget((int)first, (int)second, third);
	case SEMCTL:
		/* sign extend semid, semnum */
		return compat_sys_semctl((int)first, (int)second, third,
					 compat_ptr(ptr));

	case MSGSND:
		/* sign extend msqid */
		return compat_sys_msgsnd((int)first, (int)second, third,
					 compat_ptr(ptr));
	case MSGRCV:
		/* sign extend msqid, msgtyp */
		return compat_sys_msgrcv((int)first, second, (int)fifth,
					 third, version, compat_ptr(ptr));
	case MSGGET:
		/* sign extend key */
		return sys_msgget((int)first, second);
	case MSGCTL:
		/* sign extend msqid */
		return compat_sys_msgctl((int)first, second, compat_ptr(ptr));

	case SHMAT:
		/* sign extend shmid */
		return compat_sys_shmat((int)first, second, third, version,
					compat_ptr(ptr));
	case SHMDT:
		return sys_shmdt(compat_ptr(ptr));
	case SHMGET:
		/* sign extend key_t */
		return sys_shmget((int)first, second, third);
	case SHMCTL:
		/* sign extend shmid */
		return compat_sys_shmctl((int)first, second, compat_ptr(ptr));

	default:
		return -ENOSYS;
	};

	return -ENOSYS;
}
#endif

asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_truncate(path, (high << 32) | low);
}

asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_ftruncate(fd, (high << 32) | low);
}

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
	compat_ino_t ino;
	int err;

	if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
	    !old_valid_dev(stat->rdev))
		return -EOVERFLOW;

	ino = stat->ino;
	if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
		return -EOVERFLOW;

	err  = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(stat->ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
	err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
	err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	err |= put_user(0, &statbuf->__unused4[0]);
	err |= put_user(0, &statbuf->__unused4[1]);

	return err;
}

int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
{
	int err;

	err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(stat->ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(stat->uid, &statbuf->st_uid);
	err |= put_user(stat->gid, &statbuf->st_gid);
	err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	err |= put_user(0, &statbuf->__unused4);
	err |= put_user(0, &statbuf->__unused5);

	return err;
}

asmlinkage long compat_sys_stat64(char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_stat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_lstat64(char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_lstat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstat64(unsigned int fd,
		struct compat_stat64 __user * statbuf)
{
	struct kstat stat;
	int error = vfs_fstat(fd, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
		struct compat_stat64 __user * statbuf, int flag)
{
	struct kstat stat;
	int error = -EINVAL;

	if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
		goto out;

	if (flag & AT_SYMLINK_NOFOLLOW)
		error = vfs_lstat_fd(dfd, filename, &stat);
	else
		error = vfs_stat_fd(dfd, filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);

out:
	return error;
}

asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
{
	return sys_sysfs(option, arg1, arg2);
}

asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
{
	struct timespec t;
	int ret;
	mm_segment_t old_fs = get_fs ();
	
	set_fs (KERNEL_DS);
	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
	set_fs (old_fs);
	if (put_compat_timespec(&t, interval))
		return -EFAULT;
	return ret;
}

asmlinkage long compat_sys_rt_sigprocmask(int how,
					  compat_sigset_t __user *set,
					  compat_sigset_t __user *oset,
					  compat_size_t sigsetsize)
{
	sigset_t s;
	compat_sigset_t s32;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (set) {
		if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
			return -EFAULT;
		switch (_NSIG_WORDS) {
		case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
		case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
		case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
		case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
		}
	}
	set_fs (KERNEL_DS);
	ret = sys_rt_sigprocmask(how,
				 set ? (sigset_t __user *) &s : NULL,
				 oset ? (sigset_t __user *) &s : NULL,
				 sigsetsize);
	set_fs (old_fs);
	if (ret) return ret;
	if (oset) {
		switch (_NSIG_WORDS) {
		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
		}
		if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
			return -EFAULT;
	}
	return 0;
}

asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
				    compat_size_t sigsetsize)
{
	sigset_t s;
	compat_sigset_t s32;
	int ret;
	mm_segment_t old_fs = get_fs();
		
	set_fs (KERNEL_DS);
	ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
	set_fs (old_fs);
	if (!ret) {
		switch (_NSIG_WORDS) {
		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
		}
		if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
			return -EFAULT;
	}
	return ret;
}

asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
					   struct compat_siginfo __user *uinfo)
{
	siginfo_t info;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (copy_siginfo_from_user32(&info, uinfo))
		return -EFAULT;

	set_fs (KERNEL_DS);
	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
	set_fs (old_fs);
	return ret;
}

asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
				     struct old_sigaction32 __user *oact)
{
        struct k_sigaction new_ka, old_ka;
        int ret;

	WARN_ON_ONCE(sig >= 0);
	sig = -sig;

        if (act) {
		compat_old_sigset_t mask;
		u32 u_handler, u_restorer;
		
		ret = get_user(u_handler, &act->sa_handler);
		new_ka.sa.sa_handler =  compat_ptr(u_handler);
		ret |= __get_user(u_restorer, &act->sa_restorer);
		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
		ret |= __get_user(mask, &act->sa_mask);
		if (ret)
			return ret;
		new_ka.ka_restorer = NULL;
		siginitset(&new_ka.sa.sa_mask, mask);
        }

        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
		ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
		ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
        }

	return ret;
}

asmlinkage long compat_sys_rt_sigaction(int sig,
					struct sigaction32 __user *act,
					struct sigaction32 __user *oact,
					void __user *restorer,
					compat_size_t sigsetsize)
{
        struct k_sigaction new_ka, old_ka;
        int ret;
	compat_sigset_t set32;

        /* XXX: Don't preclude handling different sized sigset_t's.  */
        if (sigsetsize != sizeof(compat_sigset_t))
                return -EINVAL;

        if (act) {
		u32 u_handler, u_restorer;

		new_ka.ka_restorer = restorer;
		ret = get_user(u_handler, &act->sa_handler);
		new_ka.sa.sa_handler =  compat_ptr(u_handler);
		ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
		switch (_NSIG_WORDS) {
		case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
		case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
		case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
		case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
		}
		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
		ret |= __get_user(u_restorer, &act->sa_restorer);
		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
                if (ret)
                	return -EFAULT;
	}

	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		switch (_NSIG_WORDS) {
		case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
		case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
		case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
		case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
		}
		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
		ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
		ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
		if (ret)
			ret = -EFAULT;
        }

        return ret;
}

/*
 * sparc32_execve() executes a new program after the asm stub has set
 * things up for us.  This should basically do what I want it to.
 */
asmlinkage long sparc32_execve(struct pt_regs *regs)
{
	int error, base = 0;
	char *filename;

	/* User register window flush is done by entry.S */

	/* Check for indirect call. */
	if ((u32)regs->u_regs[UREG_G1] == 0)
		base = 1;

	filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;

	error = compat_do_execve(filename,
				 compat_ptr(regs->u_regs[base + UREG_I1]),
				 compat_ptr(regs->u_regs[base + UREG_I2]), regs);

	putname(filename);

	if (!error) {
		fprs_write(0);
		current_thread_info()->xfsr[0] = 0;
		current_thread_info()->fpsaved[0] = 0;
		regs->tstate &= ~TSTATE_PEF;
	}
out:
	return error;
}

#ifdef CONFIG_MODULES

asmlinkage long sys32_init_module(void __user *umod, u32 len,
				  const char __user *uargs)
{
	return sys_init_module(umod, len, uargs);
}

asmlinkage long sys32_delete_module(const char __user *name_user,
				    unsigned int flags)
{
	return sys_delete_module(name_user, flags);
}

#else /* CONFIG_MODULES */

asmlinkage long sys32_init_module(const char __user *name_user,
				  struct module __user *mod_user)
{
	return -ENOSYS;
}

asmlinkage long sys32_delete_module(const char __user *name_user)
{
	return -ENOSYS;
}

#endif  /* CONFIG_MODULES */

/* Translations due to time_t size differences.  Which affects all
   sorts of things, like timeval and itimerval.  */

extern struct timezone sys_tz;

asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
				   struct timezone __user *tz)
{
	if (tv) {
		struct timeval ktv;
		do_gettimeofday(&ktv);
		if (put_tv32(tv, &ktv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
			return -EFAULT;
	}
	return 0;
}

static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
	long usec;

	if (!access_ok(VERIFY_READ, i, sizeof(*i)))
		return -EFAULT;
	if (__get_user(o->tv_sec, &i->tv_sec))
		return -EFAULT;
	if (__get_user(usec, &i->tv_usec))
		return -EFAULT;
	o->tv_nsec = usec * 1000;
	return 0;
}

asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
				   struct timezone __user *tz)
{
	struct timespec kts;
	struct timezone ktz;

 	if (tv) {
		if (get_ts32(&kts, tv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_from_user(&ktz, tz, sizeof(ktz)))
			return -EFAULT;
	}

	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

/* These are here just in case some old sparc32 binary calls it. */
asmlinkage long sys32_pause(void)
{
	current->state = TASK_INTERRUPTIBLE;
	schedule();
	return -ERESTARTNOHAND;
}

asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
					char __user *ubuf,
					compat_size_t count,
					unsigned long poshi,
					unsigned long poslo)
{
	return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
					 char __user *ubuf,
					 compat_size_t count,
					 unsigned long poshi,
					 unsigned long poslo)
{
	return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage long compat_sys_readahead(int fd,
				     unsigned long offhi,
				     unsigned long offlo,
				     compat_size_t count)
{
	return sys_readahead(fd, (offhi << 32) | offlo, count);
}

long compat_sys_fadvise64(int fd,
			  unsigned long offhi,
			  unsigned long offlo,
			  compat_size_t len, int advice)
{
	return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
}

long compat_sys_fadvise64_64(int fd,
			     unsigned long offhi, unsigned long offlo,
			     unsigned long lenhi, unsigned long lenlo,
			     int advice)
{
	return sys_fadvise64_64(fd,
				(offhi << 32) | offlo,
				(lenhi << 32) | lenlo,
				advice);
}

asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
				    compat_off_t __user *offset,
				    compat_size_t count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	off_t of;
	
	if (offset && get_user(of, offset))
		return -EFAULT;
		
	set_fs(KERNEL_DS);
	ret = sys_sendfile(out_fd, in_fd,
			   offset ? (off_t __user *) &of : NULL,
			   count);
	set_fs(old_fs);
	
	if (offset && put_user(of, offset))
		return -EFAULT;
		
	return ret;
}

asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
				      compat_loff_t __user *offset,
				      compat_size_t count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	loff_t lof;
	
	if (offset && get_user(lof, offset))
		return -EFAULT;
		
	set_fs(KERNEL_DS);
	ret = sys_sendfile64(out_fd, in_fd,
			     offset ? (loff_t __user *) &lof : NULL,
			     count);
	set_fs(old_fs);
	
	if (offset && put_user(lof, offset))
		return -EFAULT;
		
	return ret;
}

/* This is just a version for 32-bit applications which does
 * not force O_LARGEFILE on.
 */

asmlinkage long sparc32_open(const char __user *filename,
			     int flags, int mode)
{
	return do_sys_open(AT_FDCWD, filename, flags, mode);
}

extern unsigned long do_mremap(unsigned long addr,
	unsigned long old_len, unsigned long new_len,
	unsigned long flags, unsigned long new_addr);
                
asmlinkage unsigned long sys32_mremap(unsigned long addr,
	unsigned long old_len, unsigned long new_len,
	unsigned long flags, u32 __new_addr)
{
	unsigned long ret = -EINVAL;
	unsigned long new_addr = __new_addr;

	if (unlikely(sparc64_mmap_check(addr, old_len)))
		goto out;
	if (unlikely(sparc64_mmap_check(new_addr, new_len)))
		goto out;
	down_write(&current->mm->mmap_sem);
	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
	up_write(&current->mm->mmap_sem);
out:
	return ret;       
}

struct __sysctl_args32 {
	u32 name;
	int nlen;
	u32 oldval;
	u32 oldlenp;
	u32 newval;
	u32 newlen;
	u32 __unused[4];
};

asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
{
#ifndef CONFIG_SYSCTL_SYSCALL
	return -ENOSYS;
#else
	struct __sysctl_args32 tmp;
	int error;
	size_t oldlen, __user *oldlenp = NULL;
	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;

	if (copy_from_user(&tmp, args, sizeof(tmp)))
		return -EFAULT;

	if (tmp.oldval && tmp.oldlenp) {
		/* Duh, this is ugly and might not work if sysctl_args
		   is in read-only memory, but do_sysctl does indirectly
		   a lot of uaccess in both directions and we'd have to
		   basically copy the whole sysctl.c here, and
		   glibc's __sysctl uses rw memory for the structure
		   anyway.  */
		if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
		    put_user(oldlen, (size_t __user *)addr))
			return -EFAULT;
		oldlenp = (size_t __user *)addr;
	}

	lock_kernel();
	error = do_sysctl((int __user *)(unsigned long) tmp.name,
			  tmp.nlen,
			  (void __user *)(unsigned long) tmp.oldval,
			  oldlenp,
			  (void __user *)(unsigned long) tmp.newval,
			  tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, (size_t __user *)addr) ||
			    put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
				error = -EFAULT;
		}
		if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
			error = -EFAULT;
	}
	return error;
#endif
}

long sys32_lookup_dcookie(unsigned long cookie_high,
			  unsigned long cookie_low,
			  char __user *buf, size_t len)
{
	return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
				  buf, len);
}

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)
{
	return sys_sync_file_range(fd,
				   (off_high << 32) | off_low,
				   (nb_high << 32) | nb_low,
				   flags);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				     u32 lenhi, u32 lenlo)
{
	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
			     ((loff_t)lenhi << 32) | lenlo);
}