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[SPARC64]: Use orderly_poweroff().
[linux-2.6-block.git] / arch / sparc64 / kernel / sys_sparc32.c
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1da177e4
LT		 1/* $Id: sys_sparc32.c,v 1.184 2002/02/09 19:49:31 davem Exp $
2 * sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 *
7 * These routines maintain argument size conversion between 32bit and 64bit
8 * environment.
9 */
10
1da177e4
LT		 11#include <linux/kernel.h>
12#include <linux/sched.h>
a9415644 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/fs.h>
15#include <linux/mm.h>
16#include <linux/file.h>
17#include <linux/signal.h>
18#include <linux/resource.h>
19#include <linux/times.h>
20#include <linux/utsname.h>
1da177e4
LT		 21#include <linux/smp.h>
22#include <linux/smp_lock.h>
23#include <linux/sem.h>
24#include <linux/msg.h>
25#include <linux/shm.h>
26#include <linux/slab.h>
27#include <linux/uio.h>
28#include <linux/nfs_fs.h>
29#include <linux/quota.h>
30#include <linux/module.h>
31#include <linux/sunrpc/svc.h>
32#include <linux/nfsd/nfsd.h>
33#include <linux/nfsd/cache.h>
34#include <linux/nfsd/xdr.h>
35#include <linux/nfsd/syscall.h>
36#include <linux/poll.h>
37#include <linux/personality.h>
38#include <linux/stat.h>
39#include <linux/filter.h>
40#include <linux/highmem.h>
41#include <linux/highuid.h>
42#include <linux/mman.h>
43#include <linux/ipv6.h>
44#include <linux/in.h>
45#include <linux/icmpv6.h>
46#include <linux/syscalls.h>
47#include <linux/sysctl.h>
48#include <linux/binfmts.h>
49#include <linux/dnotify.h>
50#include <linux/security.h>
51#include <linux/compat.h>
52#include <linux/vfs.h>
53#include <linux/netfilter_ipv4/ip_tables.h>
54#include <linux/ptrace.h>
55#include <linux/highuid.h>
56
57#include <asm/types.h>
58#include <asm/ipc.h>
59#include <asm/uaccess.h>
60#include <asm/fpumacro.h>
61#include <asm/semaphore.h>
62#include <asm/mmu_context.h>
d61e16df 63#include <asm/a.out.h>
14cc6aba 64#include <asm/compat_signal.h>
1da177e4
LT		 65
66asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
67{
68 return sys_chown(filename, low2highuid(user), low2highgid(group));
69}
70
71asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
72{
73 return sys_lchown(filename, low2highuid(user), low2highgid(group));
74}
75
76asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
77{
78 return sys_fchown(fd, low2highuid(user), low2highgid(group));
79}
80
81asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
82{
83 return sys_setregid(low2highgid(rgid), low2highgid(egid));
84}
85
86asmlinkage long sys32_setgid16(u16 gid)
87{
88 return sys_setgid((gid_t)gid);
89}
90
91asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
92{
93 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
94}
95
96asmlinkage long sys32_setuid16(u16 uid)
97{
98 return sys_setuid((uid_t)uid);
99}
100
101asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
102{
103 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
104 low2highuid(suid));
105}
106
107asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
108{
109 int retval;
110
111 if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
112 !(retval = put_user(high2lowuid(current->euid), euid)))
113 retval = put_user(high2lowuid(current->suid), suid);
114
115 return retval;
116}
117
118asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
119{
120 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
121 low2highgid(sgid));
122}
123
124asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
125{
126 int retval;
127
128 if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
129 !(retval = put_user(high2lowgid(current->egid), egid)))
130 retval = put_user(high2lowgid(current->sgid), sgid);
131
132 return retval;
133}
134
135asmlinkage long sys32_setfsuid16(u16 uid)
136{
137 return sys_setfsuid((uid_t)uid);
138}
139
140asmlinkage long sys32_setfsgid16(u16 gid)
141{
142 return sys_setfsgid((gid_t)gid);
143}
144
145static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
146{
147 int i;
148 u16 group;
149
150 for (i = 0; i < group_info->ngroups; i++) {
151 group = (u16)GROUP_AT(group_info, i);
152 if (put_user(group, grouplist+i))
153 return -EFAULT;
154 }
155
156 return 0;
157}
158
159static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
160{
161 int i;
162 u16 group;
163
164 for (i = 0; i < group_info->ngroups; i++) {
165 if (get_user(group, grouplist+i))
166 return -EFAULT;
167 GROUP_AT(group_info, i) = (gid_t)group;
168 }
169
170 return 0;
171}
172
173asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
174{
175 int i;
176
177 if (gidsetsize < 0)
178 return -EINVAL;
179
180 get_group_info(current->group_info);
181 i = current->group_info->ngroups;
182 if (gidsetsize) {
183 if (i > gidsetsize) {
184 i = -EINVAL;
185 goto out;
186 }
187 if (groups16_to_user(grouplist, current->group_info)) {
188 i = -EFAULT;
189 goto out;
190 }
191 }
192out:
193 put_group_info(current->group_info);
194 return i;
195}
196
197asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
198{
199 struct group_info *group_info;
200 int retval;
201
202 if (!capable(CAP_SETGID))
203 return -EPERM;
204 if ((unsigned)gidsetsize > NGROUPS_MAX)
205 return -EINVAL;
206
207 group_info = groups_alloc(gidsetsize);
208 if (!group_info)
209 return -ENOMEM;
210 retval = groups16_from_user(group_info, grouplist);
211 if (retval) {
212 put_group_info(group_info);
213 return retval;
214 }
215
216 retval = set_current_groups(group_info);
217 put_group_info(group_info);
218
219 return retval;
220}
221
222asmlinkage long sys32_getuid16(void)
223{
224 return high2lowuid(current->uid);
225}
226
227asmlinkage long sys32_geteuid16(void)
228{
229 return high2lowuid(current->euid);
230}
231
232asmlinkage long sys32_getgid16(void)
233{
234 return high2lowgid(current->gid);
235}
236
237asmlinkage long sys32_getegid16(void)
238{
239 return high2lowgid(current->egid);
240}
241
242/* 32-bit timeval and related flotsam. */
243
244static long get_tv32(struct timeval *o, struct compat_timeval __user *i)
245{
246 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
247 (__get_user(o->tv_sec, &i->tv_sec) |
248 __get_user(o->tv_usec, &i->tv_usec)));
249}
250
251static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
252{
253 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
254 (__put_user(i->tv_sec, &o->tv_sec) |
255 __put_user(i->tv_usec, &o->tv_usec)));
256}
257
258#ifdef CONFIG_SYSVIPC
259asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
260{
261 int version;
262
263 version = call >> 16; /* hack for backward compatibility */
264 call &= 0xffff;
265
266 switch (call) {
267 case SEMTIMEDOP:
268 if (fifth)
269 /* sign extend semid */
270 return compat_sys_semtimedop((int)first,
271 compat_ptr(ptr), second,
272 compat_ptr(fifth));
273 /* else fall through for normal semop() */
274 case SEMOP:
275 /* struct sembuf is the same on 32 and 64bit :)) */
276 /* sign extend semid */
277 return sys_semtimedop((int)first, compat_ptr(ptr), second,
278 NULL);
279 case SEMGET:
280 /* sign extend key, nsems */
281 return sys_semget((int)first, (int)second, third);
282 case SEMCTL:
283 /* sign extend semid, semnum */
284 return compat_sys_semctl((int)first, (int)second, third,
285 compat_ptr(ptr));
286
287 case MSGSND:
288 /* sign extend msqid */
289 return compat_sys_msgsnd((int)first, (int)second, third,
290 compat_ptr(ptr));
291 case MSGRCV:
292 /* sign extend msqid, msgtyp */
293 return compat_sys_msgrcv((int)first, second, (int)fifth,
294 third, version, compat_ptr(ptr));
295 case MSGGET:
296 /* sign extend key */
297 return sys_msgget((int)first, second);
298 case MSGCTL:
299 /* sign extend msqid */
300 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
301
302 case SHMAT:
303 /* sign extend shmid */
304 return compat_sys_shmat((int)first, second, third, version,
305 compat_ptr(ptr));
306 case SHMDT:
307 return sys_shmdt(compat_ptr(ptr));
308 case SHMGET:
309 /* sign extend key_t */
310 return sys_shmget((int)first, second, third);
311 case SHMCTL:
312 /* sign extend shmid */
313 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
314
315 default:
316 return -ENOSYS;
317 };
318
319 return -ENOSYS;
320}
321#endif
322
323asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
324{
325 if ((int)high < 0)
326 return -EINVAL;
327 else
328 return sys_truncate(path, (high << 32) | low);
329}
330
331asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
332{
333 if ((int)high < 0)
334 return -EINVAL;
335 else
336 return sys_ftruncate(fd, (high << 32) | low);
337}
338
339int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
340{
afefdbb2 341 compat_ino_t ino;
1da177e4
LT		 342 int err;
343
344 if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
345 !old_valid_dev(stat->rdev))
346 return -EOVERFLOW;
347
afefdbb2
DH		 348 ino = stat->ino;
349 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
350 return -EOVERFLOW;
351
1da177e4
LT		 352 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
353 err |= put_user(stat->ino, &statbuf->st_ino);
354 err |= put_user(stat->mode, &statbuf->st_mode);
355 err |= put_user(stat->nlink, &statbuf->st_nlink);
356 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
357 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
358 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
359 err |= put_user(stat->size, &statbuf->st_size);
360 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
0ba4da03 361 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
1da177e4 362 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
0ba4da03 363 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
1da177e4 364 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
0ba4da03 365 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
1da177e4
LT		 366 err |= put_user(stat->blksize, &statbuf->st_blksize);
367 err |= put_user(stat->blocks, &statbuf->st_blocks);
368 err |= put_user(0, &statbuf->__unused4[0]);
369 err |= put_user(0, &statbuf->__unused4[1]);
370
371 return err;
372}
373
0ba4da03
DM		 374int cp_compat_stat64(struct kstat *stat, struct compat_stat64 __user *statbuf)
375{
376 int err;
377
378 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
379 err |= put_user(stat->ino, &statbuf->st_ino);
380 err |= put_user(stat->mode, &statbuf->st_mode);
381 err |= put_user(stat->nlink, &statbuf->st_nlink);
382 err |= put_user(stat->uid, &statbuf->st_uid);
383 err |= put_user(stat->gid, &statbuf->st_gid);
384 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
385 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
386 err |= put_user(stat->size, &statbuf->st_size);
387 err |= put_user(stat->blksize, &statbuf->st_blksize);
388 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
389 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
390 err |= put_user(stat->blocks, &statbuf->st_blocks);
391 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
392 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
393 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
394 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
395 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
396 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
397 err |= put_user(0, &statbuf->__unused4);
398 err |= put_user(0, &statbuf->__unused5);
399
400 return err;
401}
402
403asmlinkage long compat_sys_stat64(char __user * filename,
404 struct compat_stat64 __user *statbuf)
405{
406 struct kstat stat;
407 int error = vfs_stat(filename, &stat);
408
409 if (!error)
410 error = cp_compat_stat64(&stat, statbuf);
411 return error;
412}
413
414asmlinkage long compat_sys_lstat64(char __user * filename,
415 struct compat_stat64 __user *statbuf)
416{
417 struct kstat stat;
418 int error = vfs_lstat(filename, &stat);
419
420 if (!error)
421 error = cp_compat_stat64(&stat, statbuf);
422 return error;
423}
424
425asmlinkage long compat_sys_fstat64(unsigned int fd,
426 struct compat_stat64 __user * statbuf)
427{
428 struct kstat stat;
429 int error = vfs_fstat(fd, &stat);
430
431 if (!error)
432 error = cp_compat_stat64(&stat, statbuf);
433 return error;
434}
435
40ad7a6a
DM		 436asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
437 struct compat_stat64 __user * statbuf, int flag)
438{
439 struct kstat stat;
440 int error = -EINVAL;
441
442 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
443 goto out;
444
445 if (flag & AT_SYMLINK_NOFOLLOW)
446 error = vfs_lstat_fd(dfd, filename, &stat);
447 else
448 error = vfs_stat_fd(dfd, filename, &stat);
449
450 if (!error)
451 error = cp_compat_stat64(&stat, statbuf);
452
453out:
454 return error;
455}
456
1da177e4
LT		 457asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
458{
459 return sys_sysfs(option, arg1, arg2);
460}
461
1da177e4
LT		 462asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
463{
464 struct timespec t;
465 int ret;
466 mm_segment_t old_fs = get_fs ();
467
468 set_fs (KERNEL_DS);
469 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
470 set_fs (old_fs);
471 if (put_compat_timespec(&t, interval))
472 return -EFAULT;
473 return ret;
474}
475
476asmlinkage long compat_sys_rt_sigprocmask(int how,
477 compat_sigset_t __user *set,
478 compat_sigset_t __user *oset,
479 compat_size_t sigsetsize)
480{
481 sigset_t s;
482 compat_sigset_t s32;
483 int ret;
484 mm_segment_t old_fs = get_fs();
485
486 if (set) {
487 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
488 return -EFAULT;
489 switch (_NSIG_WORDS) {
490 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
491 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
492 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
493 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
494 }
495 }
496 set_fs (KERNEL_DS);
497 ret = sys_rt_sigprocmask(how,
498 set ? (sigset_t __user *) &s : NULL,
499 oset ? (sigset_t __user *) &s : NULL,
500 sigsetsize);
501 set_fs (old_fs);
502 if (ret) return ret;
503 if (oset) {
504 switch (_NSIG_WORDS) {
505 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
506 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
507 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
508 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
509 }
510 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
511 return -EFAULT;
512 }
513 return 0;
514}
515
516asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
517 compat_size_t sigsetsize)
518{
519 sigset_t s;
520 compat_sigset_t s32;
521 int ret;
522 mm_segment_t old_fs = get_fs();
523
524 set_fs (KERNEL_DS);
525 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
526 set_fs (old_fs);
527 if (!ret) {
528 switch (_NSIG_WORDS) {
529 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
530 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
531 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
532 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
533 }
534 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
535 return -EFAULT;
536 }
537 return ret;
538}
539
540asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
541 struct compat_siginfo __user *uinfo)
542{
543 siginfo_t info;
544 int ret;
545 mm_segment_t old_fs = get_fs();
546
547 if (copy_siginfo_from_user32(&info, uinfo))
548 return -EFAULT;
549
550 set_fs (KERNEL_DS);
551 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
552 set_fs (old_fs);
553 return ret;
554}
555
556asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
557 struct old_sigaction32 __user *oact)
558{
559 struct k_sigaction new_ka, old_ka;
560 int ret;
561
562 if (sig < 0) {
563 set_thread_flag(TIF_NEWSIGNALS);
564 sig = -sig;
565 }
566
567 if (act) {
568 compat_old_sigset_t mask;
569 u32 u_handler, u_restorer;
570
571 ret = get_user(u_handler, &act->sa_handler);
572 new_ka.sa.sa_handler = compat_ptr(u_handler);
573 ret |= __get_user(u_restorer, &act->sa_restorer);
574 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
575 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
576 ret |= __get_user(mask, &act->sa_mask);
577 if (ret)
578 return ret;
579 new_ka.ka_restorer = NULL;
580 siginitset(&new_ka.sa.sa_mask, mask);
581 }
582
583 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
584
585 if (!ret && oact) {
586 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
587 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
588 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
589 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
590 }
591
592 return ret;
593}
594
595asmlinkage long compat_sys_rt_sigaction(int sig,
596 struct sigaction32 __user *act,
597 struct sigaction32 __user *oact,
598 void __user *restorer,
599 compat_size_t sigsetsize)
600{
601 struct k_sigaction new_ka, old_ka;
602 int ret;
603 compat_sigset_t set32;
604
605 /* XXX: Don't preclude handling different sized sigset_t's. */
606 if (sigsetsize != sizeof(compat_sigset_t))
607 return -EINVAL;
608
609 /* All tasks which use RT signals (effectively) use
610 * new style signals.
611 */
612 set_thread_flag(TIF_NEWSIGNALS);
613
614 if (act) {
615 u32 u_handler, u_restorer;
616
617 new_ka.ka_restorer = restorer;
618 ret = get_user(u_handler, &act->sa_handler);
619 new_ka.sa.sa_handler = compat_ptr(u_handler);
620 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
621 switch (_NSIG_WORDS) {
622 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
623 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
624 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
625 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
626 }
627 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
628 ret |= __get_user(u_restorer, &act->sa_restorer);
629 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
630 if (ret)
631 return -EFAULT;
632 }
633
634 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
635
636 if (!ret && oact) {
637 switch (_NSIG_WORDS) {
638 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
639 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
640 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
641 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
642 }
643 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
644 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
645 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
646 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
647 if (ret)
648 ret = -EFAULT;
649 }
650
651 return ret;
652}
653
654/*
655 * sparc32_execve() executes a new program after the asm stub has set
656 * things up for us. This should basically do what I want it to.
657 */
658asmlinkage long sparc32_execve(struct pt_regs *regs)
659{
660 int error, base = 0;
661 char *filename;
662
663 /* User register window flush is done by entry.S */
664
665 /* Check for indirect call. */
666 if ((u32)regs->u_regs[UREG_G1] == 0)
667 base = 1;
668
669 filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
670 error = PTR_ERR(filename);
671 if (IS_ERR(filename))
672 goto out;
673
674 error = compat_do_execve(filename,
675 compat_ptr(regs->u_regs[base + UREG_I1]),
676 compat_ptr(regs->u_regs[base + UREG_I2]), regs);
677
678 putname(filename);
679
680 if (!error) {
681 fprs_write(0);
682 current_thread_info()->xfsr[0] = 0;
683 current_thread_info()->fpsaved[0] = 0;
684 regs->tstate &= ~TSTATE_PEF;
685 task_lock(current);
686 current->ptrace &= ~PT_DTRACE;
687 task_unlock(current);
688 }
689out:
690 return error;
691}
692
693#ifdef CONFIG_MODULES
694
695asmlinkage long sys32_init_module(void __user *umod, u32 len,
696 const char __user *uargs)
697{
698 return sys_init_module(umod, len, uargs);
699}
700
701asmlinkage long sys32_delete_module(const char __user *name_user,
702 unsigned int flags)
703{
704 return sys_delete_module(name_user, flags);
705}
706
707#else /* CONFIG_MODULES */
708
709asmlinkage long sys32_init_module(const char __user *name_user,
710 struct module __user *mod_user)
711{
712 return -ENOSYS;
713}
714
715asmlinkage long sys32_delete_module(const char __user *name_user)
716{
717 return -ENOSYS;
718}
719
720#endif /* CONFIG_MODULES */
721
722/* Translations due to time_t size differences. Which affects all
723 sorts of things, like timeval and itimerval. */
724
725extern struct timezone sys_tz;
726
727asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
728 struct timezone __user *tz)
729{
730 if (tv) {
731 struct timeval ktv;
732 do_gettimeofday(&ktv);
733 if (put_tv32(tv, &ktv))
734 return -EFAULT;
735 }
736 if (tz) {
737 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
738 return -EFAULT;
739 }
740 return 0;
741}
742
743static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
744{
745 long usec;
746
747 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
748 return -EFAULT;
749 if (__get_user(o->tv_sec, &i->tv_sec))
750 return -EFAULT;
751 if (__get_user(usec, &i->tv_usec))
752 return -EFAULT;
753 o->tv_nsec = usec * 1000;
754 return 0;
755}
756
757asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
758 struct timezone __user *tz)
759{
760 struct timespec kts;
761 struct timezone ktz;
762
763 if (tv) {
764 if (get_ts32(&kts, tv))
765 return -EFAULT;
766 }
767 if (tz) {
768 if (copy_from_user(&ktz, tz, sizeof(ktz)))
769 return -EFAULT;
770 }
771
772 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
773}
774
775asmlinkage long sys32_utimes(char __user *filename,
776 struct compat_timeval __user *tvs)
777{
1c710c89 778 struct timespec tv[2];
1da177e4
LT		 779
780 if (tvs) {
1c710c89 781 struct timeval ktvs[2];
1da177e4
LT		 782 if (get_tv32(&ktvs[0], tvs) ||
783 get_tv32(&ktvs[1], 1+tvs))
784 return -EFAULT;
1c710c89
UD		 785
786 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
787 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
788 return -EINVAL;
789
790 tv[0].tv_sec = ktvs[0].tv_sec;
791 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
792 tv[1].tv_sec = ktvs[1].tv_sec;
793 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1da177e4
LT		 794 }
795
6c114260 796 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1da177e4
LT		 797}
798
799/* These are here just in case some old sparc32 binary calls it. */
800asmlinkage long sys32_pause(void)
801{
802 current->state = TASK_INTERRUPTIBLE;
803 schedule();
804 return -ERESTARTNOHAND;
805}
806
807asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
808 char __user *ubuf,
809 compat_size_t count,
810 unsigned long poshi,
811 unsigned long poslo)
812{
813 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
814}
815
816asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
817 char __user *ubuf,
818 compat_size_t count,
819 unsigned long poshi,
820 unsigned long poslo)
821{
822 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
823}
824
825asmlinkage long compat_sys_readahead(int fd,
826 unsigned long offhi,
827 unsigned long offlo,
828 compat_size_t count)
829{
830 return sys_readahead(fd, (offhi << 32) | offlo, count);
831}
832
833long compat_sys_fadvise64(int fd,
834 unsigned long offhi,
835 unsigned long offlo,
836 compat_size_t len, int advice)
837{
838 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
839}
840
841long compat_sys_fadvise64_64(int fd,
842 unsigned long offhi, unsigned long offlo,
843 unsigned long lenhi, unsigned long lenlo,
844 int advice)
845{
846 return sys_fadvise64_64(fd,
847 (offhi << 32) | offlo,
848 (lenhi << 32) | lenlo,
849 advice);
850}
851
852asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
853 compat_off_t __user *offset,
854 compat_size_t count)
855{
856 mm_segment_t old_fs = get_fs();
857 int ret;
858 off_t of;
859
860 if (offset && get_user(of, offset))
861 return -EFAULT;
862
863 set_fs(KERNEL_DS);
864 ret = sys_sendfile(out_fd, in_fd,
865 offset ? (off_t __user *) &of : NULL,
866 count);
867 set_fs(old_fs);
868
869 if (offset && put_user(of, offset))
870 return -EFAULT;
871
872 return ret;
873}
874
875asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
876 compat_loff_t __user *offset,
877 compat_size_t count)
878{
879 mm_segment_t old_fs = get_fs();
880 int ret;
881 loff_t lof;
882
883 if (offset && get_user(lof, offset))
884 return -EFAULT;
885
886 set_fs(KERNEL_DS);
887 ret = sys_sendfile64(out_fd, in_fd,
888 offset ? (loff_t __user *) &lof : NULL,
889 count);
890 set_fs(old_fs);
891
892 if (offset && put_user(lof, offset))
893 return -EFAULT;
894
895 return ret;
896}
897
1da177e4
LT		 898/* This is just a version for 32-bit applications which does
899 * not force O_LARGEFILE on.
900 */
901
902asmlinkage long sparc32_open(const char __user *filename,
903 int flags, int mode)
904{
5590ff0d 905 return do_sys_open(AT_FDCWD, filename, flags, mode);
1da177e4
LT		 906}
907
908extern unsigned long do_mremap(unsigned long addr,
909 unsigned long old_len, unsigned long new_len,
910 unsigned long flags, unsigned long new_addr);
911
912asmlinkage unsigned long sys32_mremap(unsigned long addr,
913 unsigned long old_len, unsigned long new_len,
914 unsigned long flags, u32 __new_addr)
915{
916 struct vm_area_struct *vma;
917 unsigned long ret = -EINVAL;
918 unsigned long new_addr = __new_addr;
919
d61e16df 920 if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
1da177e4 921 goto out;
d61e16df 922 if (addr > STACK_TOP32 - old_len)
1da177e4
LT		 923 goto out;
924 down_write(&current->mm->mmap_sem);
925 if (flags & MREMAP_FIXED) {
d61e16df 926 if (new_addr > STACK_TOP32 - new_len)
1da177e4 927 goto out_sem;
d61e16df 928 } else if (addr > STACK_TOP32 - new_len) {
1da177e4
LT		 929 unsigned long map_flags = 0;
930 struct file *file = NULL;
931
932 ret = -ENOMEM;
933 if (!(flags & MREMAP_MAYMOVE))
934 goto out_sem;
935
936 vma = find_vma(current->mm, addr);
937 if (vma) {
938 if (vma->vm_flags & VM_SHARED)
939 map_flags |= MAP_SHARED;
940 file = vma->vm_file;
941 }
942
943 /* MREMAP_FIXED checked above. */
944 new_addr = get_unmapped_area(file, addr, new_len,
945 vma ? vma->vm_pgoff : 0,
946 map_flags);
947 ret = new_addr;
948 if (new_addr & ~PAGE_MASK)
949 goto out_sem;
950 flags |= MREMAP_FIXED;
951 }
952 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
953out_sem:
954 up_write(&current->mm->mmap_sem);
955out:
956 return ret;
957}
958
959struct __sysctl_args32 {
960 u32 name;
961 int nlen;
962 u32 oldval;
963 u32 oldlenp;
964 u32 newval;
965 u32 newlen;
966 u32 __unused[4];
967};
968
969asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
970{
b89a8171 971#ifndef CONFIG_SYSCTL_SYSCALL
1da177e4
LT		 972 return -ENOSYS;
973#else
974 struct __sysctl_args32 tmp;
975 int error;
976 size_t oldlen, __user *oldlenp = NULL;
977 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
978
979 if (copy_from_user(&tmp, args, sizeof(tmp)))
980 return -EFAULT;
981
982 if (tmp.oldval && tmp.oldlenp) {
983 /* Duh, this is ugly and might not work if sysctl_args
984 is in read-only memory, but do_sysctl does indirectly
985 a lot of uaccess in both directions and we'd have to
986 basically copy the whole sysctl.c here, and
987 glibc's __sysctl uses rw memory for the structure
988 anyway. */
989 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
990 put_user(oldlen, (size_t __user *)addr))
991 return -EFAULT;
992 oldlenp = (size_t __user *)addr;
993 }
994
995 lock_kernel();
996 error = do_sysctl((int __user *)(unsigned long) tmp.name,
997 tmp.nlen,
998 (void __user *)(unsigned long) tmp.oldval,
999 oldlenp,
1000 (void __user *)(unsigned long) tmp.newval,
1001 tmp.newlen);
1002 unlock_kernel();
1003 if (oldlenp) {
1004 if (!error) {
1005 if (get_user(oldlen, (size_t __user *)addr) ||
1006 put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
1007 error = -EFAULT;
1008 }
1009 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
1010 error = -EFAULT;
1011 }
1012 return error;
1013#endif
1014}
1015
1016long sys32_lookup_dcookie(unsigned long cookie_high,
1017 unsigned long cookie_low,
1018 char __user *buf, size_t len)
1019{
1020 return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
1021 buf, len);
1022}
289eee6f
DM		 1023
1024long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
1025{
1026 return sys_sync_file_range(fd,
1027 (off_high << 32) | off_low,
1028 (nb_high << 32) | nb_low,
1029 flags);
1030}
Linux 6.x block layer and io_uring tree(s)