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[PATCH] ppc32: fix destroy_context() race condition
[linux-block.git] / arch / s390 / kernel / compat_linux.c
CommitLineData
1da177e4
LT		 1/*
2 * arch/s390x/kernel/linux32.c
3 *
4 * S390 version
5 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 * Gerhard Tonn (ton@de.ibm.com)
8 * Thomas Spatzier (tspat@de.ibm.com)
9 *
10 * Conversion between 31bit and 64bit native syscalls.
11 *
12 * Heavily inspired by the 32-bit Sparc compat code which is
13 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
14 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
15 *
16 */
17
18
19#include <linux/config.h>
20#include <linux/kernel.h>
21#include <linux/sched.h>
22#include <linux/fs.h>
23#include <linux/mm.h>
24#include <linux/file.h>
25#include <linux/signal.h>
26#include <linux/resource.h>
27#include <linux/times.h>
28#include <linux/utsname.h>
29#include <linux/timex.h>
30#include <linux/smp.h>
31#include <linux/smp_lock.h>
32#include <linux/sem.h>
33#include <linux/msg.h>
34#include <linux/shm.h>
35#include <linux/slab.h>
36#include <linux/uio.h>
37#include <linux/nfs_fs.h>
38#include <linux/quota.h>
39#include <linux/module.h>
40#include <linux/sunrpc/svc.h>
41#include <linux/nfsd/nfsd.h>
42#include <linux/nfsd/cache.h>
43#include <linux/nfsd/xdr.h>
44#include <linux/nfsd/syscall.h>
45#include <linux/poll.h>
46#include <linux/personality.h>
47#include <linux/stat.h>
48#include <linux/filter.h>
49#include <linux/highmem.h>
50#include <linux/highuid.h>
51#include <linux/mman.h>
52#include <linux/ipv6.h>
53#include <linux/in.h>
54#include <linux/icmpv6.h>
55#include <linux/syscalls.h>
56#include <linux/sysctl.h>
57#include <linux/binfmts.h>
58#include <linux/compat.h>
59#include <linux/vfs.h>
60#include <linux/ptrace.h>
61
62#include <asm/types.h>
63#include <asm/ipc.h>
64#include <asm/uaccess.h>
65#include <asm/semaphore.h>
66
67#include <net/scm.h>
68#include <net/sock.h>
69
70#include "compat_linux.h"
71
72
73/* For this source file, we want overflow handling. */
74
75#undef high2lowuid
76#undef high2lowgid
77#undef low2highuid
78#undef low2highgid
79#undef SET_UID16
80#undef SET_GID16
81#undef NEW_TO_OLD_UID
82#undef NEW_TO_OLD_GID
83#undef SET_OLDSTAT_UID
84#undef SET_OLDSTAT_GID
85#undef SET_STAT_UID
86#undef SET_STAT_GID
87
88#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
89#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
90#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
91#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
92#define SET_UID16(var, uid) var = high2lowuid(uid)
93#define SET_GID16(var, gid) var = high2lowgid(gid)
94#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
95#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
96#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
97#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
98#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
99#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
100
101asmlinkage long sys32_chown16(const char * filename, u16 user, u16 group)
102{
103 return sys_chown(filename, low2highuid(user), low2highgid(group));
104}
105
106asmlinkage long sys32_lchown16(const char * filename, u16 user, u16 group)
107{
108 return sys_lchown(filename, low2highuid(user), low2highgid(group));
109}
110
111asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
112{
113 return sys_fchown(fd, low2highuid(user), low2highgid(group));
114}
115
116asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
117{
118 return sys_setregid(low2highgid(rgid), low2highgid(egid));
119}
120
121asmlinkage long sys32_setgid16(u16 gid)
122{
123 return sys_setgid((gid_t)gid);
124}
125
126asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
127{
128 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
129}
130
131asmlinkage long sys32_setuid16(u16 uid)
132{
133 return sys_setuid((uid_t)uid);
134}
135
136asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
137{
138 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
139 low2highuid(suid));
140}
141
142asmlinkage long sys32_getresuid16(u16 *ruid, u16 *euid, u16 *suid)
143{
144 int retval;
145
146 if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
147 !(retval = put_user(high2lowuid(current->euid), euid)))
148 retval = put_user(high2lowuid(current->suid), suid);
149
150 return retval;
151}
152
153asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
154{
155 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
156 low2highgid(sgid));
157}
158
159asmlinkage long sys32_getresgid16(u16 *rgid, u16 *egid, u16 *sgid)
160{
161 int retval;
162
163 if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
164 !(retval = put_user(high2lowgid(current->egid), egid)))
165 retval = put_user(high2lowgid(current->sgid), sgid);
166
167 return retval;
168}
169
170asmlinkage long sys32_setfsuid16(u16 uid)
171{
172 return sys_setfsuid((uid_t)uid);
173}
174
175asmlinkage long sys32_setfsgid16(u16 gid)
176{
177 return sys_setfsgid((gid_t)gid);
178}
179
180static int groups16_to_user(u16 *grouplist, struct group_info *group_info)
181{
182 int i;
183 u16 group;
184
185 for (i = 0; i < group_info->ngroups; i++) {
186 group = (u16)GROUP_AT(group_info, i);
187 if (put_user(group, grouplist+i))
188 return -EFAULT;
189 }
190
191 return 0;
192}
193
194static int groups16_from_user(struct group_info *group_info, u16 *grouplist)
195{
196 int i;
197 u16 group;
198
199 for (i = 0; i < group_info->ngroups; i++) {
200 if (get_user(group, grouplist+i))
201 return -EFAULT;
202 GROUP_AT(group_info, i) = (gid_t)group;
203 }
204
205 return 0;
206}
207
208asmlinkage long sys32_getgroups16(int gidsetsize, u16 *grouplist)
209{
210 int i;
211
212 if (gidsetsize < 0)
213 return -EINVAL;
214
215 get_group_info(current->group_info);
216 i = current->group_info->ngroups;
217 if (gidsetsize) {
218 if (i > gidsetsize) {
219 i = -EINVAL;
220 goto out;
221 }
222 if (groups16_to_user(grouplist, current->group_info)) {
223 i = -EFAULT;
224 goto out;
225 }
226 }
227out:
228 put_group_info(current->group_info);
229 return i;
230}
231
232asmlinkage long sys32_setgroups16(int gidsetsize, u16 *grouplist)
233{
234 struct group_info *group_info;
235 int retval;
236
237 if (!capable(CAP_SETGID))
238 return -EPERM;
239 if ((unsigned)gidsetsize > NGROUPS_MAX)
240 return -EINVAL;
241
242 group_info = groups_alloc(gidsetsize);
243 if (!group_info)
244 return -ENOMEM;
245 retval = groups16_from_user(group_info, grouplist);
246 if (retval) {
247 put_group_info(group_info);
248 return retval;
249 }
250
251 retval = set_current_groups(group_info);
252 put_group_info(group_info);
253
254 return retval;
255}
256
257asmlinkage long sys32_getuid16(void)
258{
259 return high2lowuid(current->uid);
260}
261
262asmlinkage long sys32_geteuid16(void)
263{
264 return high2lowuid(current->euid);
265}
266
267asmlinkage long sys32_getgid16(void)
268{
269 return high2lowgid(current->gid);
270}
271
272asmlinkage long sys32_getegid16(void)
273{
274 return high2lowgid(current->egid);
275}
276
277/* 32-bit timeval and related flotsam. */
278
279static inline long get_tv32(struct timeval *o, struct compat_timeval *i)
280{
281 return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
282 (__get_user(o->tv_sec, &i->tv_sec) ||
283 __get_user(o->tv_usec, &i->tv_usec)));
284}
285
286static inline long put_tv32(struct compat_timeval *o, struct timeval *i)
287{
288 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
289 (__put_user(i->tv_sec, &o->tv_sec) ||
290 __put_user(i->tv_usec, &o->tv_usec)));
291}
292
293/*
294 * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
295 *
296 * This is really horribly ugly.
297 */
298asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
299{
300 if (call >> 16) /* hack for backward compatibility */
301 return -EINVAL;
302
303 call &= 0xffff;
304
305 switch (call) {
306 case SEMTIMEDOP:
307 return compat_sys_semtimedop(first, compat_ptr(ptr),
308 second, compat_ptr(third));
309 case SEMOP:
310 /* struct sembuf is the same on 32 and 64bit :)) */
311 return sys_semtimedop(first, compat_ptr(ptr),
312 second, NULL);
313 case SEMGET:
314 return sys_semget(first, second, third);
315 case SEMCTL:
316 return compat_sys_semctl(first, second, third,
317 compat_ptr(ptr));
318 case MSGSND:
319 return compat_sys_msgsnd(first, second, third,
320 compat_ptr(ptr));
321 case MSGRCV:
322 return compat_sys_msgrcv(first, second, 0, third,
323 0, compat_ptr(ptr));
324 case MSGGET:
325 return sys_msgget((key_t) first, second);
326 case MSGCTL:
327 return compat_sys_msgctl(first, second, compat_ptr(ptr));
328 case SHMAT:
329 return compat_sys_shmat(first, second, third,
330 0, compat_ptr(ptr));
331 case SHMDT:
332 return sys_shmdt(compat_ptr(ptr));
333 case SHMGET:
334 return sys_shmget(first, (unsigned)second, third);
335 case SHMCTL:
336 return compat_sys_shmctl(first, second, compat_ptr(ptr));
337 }
338
339 return -ENOSYS;
340}
341
342asmlinkage long sys32_truncate64(const char * path, unsigned long high, unsigned long low)
343{
344 if ((int)high < 0)
345 return -EINVAL;
346 else
347 return sys_truncate(path, (high << 32) | low);
348}
349
350asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
351{
352 if ((int)high < 0)
353 return -EINVAL;
354 else
355 return sys_ftruncate(fd, (high << 32) | low);
356}
357
358int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
359{
360 int err;
361
362 if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
363 return -EOVERFLOW;
364
365 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
366 err |= put_user(stat->ino, &statbuf->st_ino);
367 err |= put_user(stat->mode, &statbuf->st_mode);
368 err |= put_user(stat->nlink, &statbuf->st_nlink);
369 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
370 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
371 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
372 err |= put_user(stat->size, &statbuf->st_size);
373 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
374 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
375 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
376 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
377 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
378 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
379 err |= put_user(stat->blksize, &statbuf->st_blksize);
380 err |= put_user(stat->blocks, &statbuf->st_blocks);
381/* fixme
382 err |= put_user(0, &statbuf->__unused4[0]);
383 err |= put_user(0, &statbuf->__unused4[1]);
384*/
385 return err;
386}
387
388struct sysinfo32 {
389 s32 uptime;
390 u32 loads[3];
391 u32 totalram;
392 u32 freeram;
393 u32 sharedram;
394 u32 bufferram;
395 u32 totalswap;
396 u32 freeswap;
397 unsigned short procs;
398 unsigned short pads;
399 u32 totalhigh;
400 u32 freehigh;
401 unsigned int mem_unit;
402 char _f[8];
403};
404
405asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
406{
407 struct sysinfo s;
408 int ret, err;
409 mm_segment_t old_fs = get_fs ();
410
411 set_fs (KERNEL_DS);
412 ret = sys_sysinfo(&s);
413 set_fs (old_fs);
414 err = put_user (s.uptime, &info->uptime);
415 err |= __put_user (s.loads[0], &info->loads[0]);
416 err |= __put_user (s.loads[1], &info->loads[1]);
417 err |= __put_user (s.loads[2], &info->loads[2]);
418 err |= __put_user (s.totalram, &info->totalram);
419 err |= __put_user (s.freeram, &info->freeram);
420 err |= __put_user (s.sharedram, &info->sharedram);
421 err |= __put_user (s.bufferram, &info->bufferram);
422 err |= __put_user (s.totalswap, &info->totalswap);
423 err |= __put_user (s.freeswap, &info->freeswap);
424 err |= __put_user (s.procs, &info->procs);
425 err |= __put_user (s.totalhigh, &info->totalhigh);
426 err |= __put_user (s.freehigh, &info->freehigh);
427 err |= __put_user (s.mem_unit, &info->mem_unit);
428 if (err)
429 return -EFAULT;
430 return ret;
431}
432
433asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
434 struct compat_timespec __user *interval)
435{
436 struct timespec t;
437 int ret;
438 mm_segment_t old_fs = get_fs ();
439
440 set_fs (KERNEL_DS);
441 ret = sys_sched_rr_get_interval(pid, &t);
442 set_fs (old_fs);
443 if (put_compat_timespec(&t, interval))
444 return -EFAULT;
445 return ret;
446}
447
448asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
449 compat_sigset_t __user *oset, size_t sigsetsize)
450{
451 sigset_t s;
452 compat_sigset_t s32;
453 int ret;
454 mm_segment_t old_fs = get_fs();
455
456 if (set) {
457 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
458 return -EFAULT;
459 switch (_NSIG_WORDS) {
460 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
461 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
462 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
463 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
464 }
465 }
466 set_fs (KERNEL_DS);
467 ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL, sigsetsize);
468 set_fs (old_fs);
469 if (ret) return ret;
470 if (oset) {
471 switch (_NSIG_WORDS) {
472 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
473 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
474 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
475 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
476 }
477 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
478 return -EFAULT;
479 }
480 return 0;
481}
482
483asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
484 size_t sigsetsize)
485{
486 sigset_t s;
487 compat_sigset_t s32;
488 int ret;
489 mm_segment_t old_fs = get_fs();
490
491 set_fs (KERNEL_DS);
492 ret = sys_rt_sigpending(&s, sigsetsize);
493 set_fs (old_fs);
494 if (!ret) {
495 switch (_NSIG_WORDS) {
496 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
497 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
498 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
499 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
500 }
501 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
502 return -EFAULT;
503 }
504 return ret;
505}
506
507asmlinkage long
508sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
509{
510 siginfo_t info;
511 int ret;
512 mm_segment_t old_fs = get_fs();
513
514 if (copy_siginfo_from_user32(&info, uinfo))
515 return -EFAULT;
516 set_fs (KERNEL_DS);
517 ret = sys_rt_sigqueueinfo(pid, sig, &info);
518 set_fs (old_fs);
519 return ret;
520}
521
522/*
523 * sys32_execve() executes a new program after the asm stub has set
524 * things up for us. This should basically do what I want it to.
525 */
526asmlinkage long
527sys32_execve(struct pt_regs regs)
528{
529 int error;
530 char * filename;
531
532 filename = getname(compat_ptr(regs.orig_gpr2));
533 error = PTR_ERR(filename);
534 if (IS_ERR(filename))
535 goto out;
536 error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
537 compat_ptr(regs.gprs[4]), &regs);
538 if (error == 0)
539 {
540 task_lock(current);
541 current->ptrace &= ~PT_DTRACE;
542 task_unlock(current);
543 current->thread.fp_regs.fpc=0;
544 __asm__ __volatile__
545 ("sr 0,0\n\t"
546 "sfpc 0,0\n\t"
547 : : :"0");
548 }
549 putname(filename);
550out:
551 return error;
552}
553
554
555#ifdef CONFIG_MODULES
556
557asmlinkage long
558sys32_init_module(void __user *umod, unsigned long len,
559 const char __user *uargs)
560{
561 return sys_init_module(umod, len, uargs);
562}
563
564asmlinkage long
565sys32_delete_module(const char __user *name_user, unsigned int flags)
566{
567 return sys_delete_module(name_user, flags);
568}
569
570#else /* CONFIG_MODULES */
571
572asmlinkage long
573sys32_init_module(void __user *umod, unsigned long len,
574 const char __user *uargs)
575{
576 return -ENOSYS;
577}
578
579asmlinkage long
580sys32_delete_module(const char __user *name_user, unsigned int flags)
581{
582 return -ENOSYS;
583}
584
585#endif /* CONFIG_MODULES */
586
587/* Translations due to time_t size differences. Which affects all
588 sorts of things, like timeval and itimerval. */
589
590extern struct timezone sys_tz;
591
592asmlinkage long sys32_gettimeofday(struct compat_timeval *tv, struct timezone *tz)
593{
594 if (tv) {
595 struct timeval ktv;
596 do_gettimeofday(&ktv);
597 if (put_tv32(tv, &ktv))
598 return -EFAULT;
599 }
600 if (tz) {
601 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
602 return -EFAULT;
603 }
604 return 0;
605}
606
607static inline long get_ts32(struct timespec *o, struct compat_timeval *i)
608{
609 long usec;
610
611 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
612 return -EFAULT;
613 if (__get_user(o->tv_sec, &i->tv_sec))
614 return -EFAULT;
615 if (__get_user(usec, &i->tv_usec))
616 return -EFAULT;
617 o->tv_nsec = usec * 1000;
618 return 0;
619}
620
621asmlinkage long sys32_settimeofday(struct compat_timeval *tv, struct timezone *tz)
622{
623 struct timespec kts;
624 struct timezone ktz;
625
626 if (tv) {
627 if (get_ts32(&kts, tv))
628 return -EFAULT;
629 }
630 if (tz) {
631 if (copy_from_user(&ktz, tz, sizeof(ktz)))
632 return -EFAULT;
633 }
634
635 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
636}
637
638/* These are here just in case some old sparc32 binary calls it. */
639asmlinkage long sys32_pause(void)
640{
641 current->state = TASK_INTERRUPTIBLE;
642 schedule();
643 return -ERESTARTNOHAND;
644}
645
646asmlinkage long sys32_pread64(unsigned int fd, char *ubuf,
647 size_t count, u32 poshi, u32 poslo)
648{
649 if ((compat_ssize_t) count < 0)
650 return -EINVAL;
651 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
652}
653
654asmlinkage long sys32_pwrite64(unsigned int fd, const char *ubuf,
655 size_t count, u32 poshi, u32 poslo)
656{
657 if ((compat_ssize_t) count < 0)
658 return -EINVAL;
659 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
660}
661
662asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
663{
664 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
665}
666
667asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset, size_t count)
668{
669 mm_segment_t old_fs = get_fs();
670 int ret;
671 off_t of;
672
673 if (offset && get_user(of, offset))
674 return -EFAULT;
675
676 set_fs(KERNEL_DS);
677 ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
678 set_fs(old_fs);
679
680 if (!ret && offset && put_user(of, offset))
681 return -EFAULT;
682
683 return ret;
684}
685
686asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
687 compat_loff_t *offset, s32 count)
688{
689 mm_segment_t old_fs = get_fs();
690 int ret;
691 loff_t lof;
692
693 if (offset && get_user(lof, offset))
694 return -EFAULT;
695
696 set_fs(KERNEL_DS);
697 ret = sys_sendfile64(out_fd, in_fd, offset ? &lof : NULL, count);
698 set_fs(old_fs);
699
700 if (offset && put_user(lof, offset))
701 return -EFAULT;
702
703 return ret;
704}
705
706/* Handle adjtimex compatibility. */
707
708struct timex32 {
709 u32 modes;
710 s32 offset, freq, maxerror, esterror;
711 s32 status, constant, precision, tolerance;
712 struct compat_timeval time;
713 s32 tick;
714 s32 ppsfreq, jitter, shift, stabil;
715 s32 jitcnt, calcnt, errcnt, stbcnt;
716 s32 :32; s32 :32; s32 :32; s32 :32;
717 s32 :32; s32 :32; s32 :32; s32 :32;
718 s32 :32; s32 :32; s32 :32; s32 :32;
719};
720
721extern int do_adjtimex(struct timex *);
722
723asmlinkage long sys32_adjtimex(struct timex32 *utp)
724{
725 struct timex txc;
726 int ret;
727
728 memset(&txc, 0, sizeof(struct timex));
729
730 if(get_user(txc.modes, &utp->modes) ||
731 __get_user(txc.offset, &utp->offset) ||
732 __get_user(txc.freq, &utp->freq) ||
733 __get_user(txc.maxerror, &utp->maxerror) ||
734 __get_user(txc.esterror, &utp->esterror) ||
735 __get_user(txc.status, &utp->status) ||
736 __get_user(txc.constant, &utp->constant) ||
737 __get_user(txc.precision, &utp->precision) ||
738 __get_user(txc.tolerance, &utp->tolerance) ||
739 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
740 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
741 __get_user(txc.tick, &utp->tick) ||
742 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
743 __get_user(txc.jitter, &utp->jitter) ||
744 __get_user(txc.shift, &utp->shift) ||
745 __get_user(txc.stabil, &utp->stabil) ||
746 __get_user(txc.jitcnt, &utp->jitcnt) ||
747 __get_user(txc.calcnt, &utp->calcnt) ||
748 __get_user(txc.errcnt, &utp->errcnt) ||
749 __get_user(txc.stbcnt, &utp->stbcnt))
750 return -EFAULT;
751
752 ret = do_adjtimex(&txc);
753
754 if(put_user(txc.modes, &utp->modes) ||
755 __put_user(txc.offset, &utp->offset) ||
756 __put_user(txc.freq, &utp->freq) ||
757 __put_user(txc.maxerror, &utp->maxerror) ||
758 __put_user(txc.esterror, &utp->esterror) ||
759 __put_user(txc.status, &utp->status) ||
760 __put_user(txc.constant, &utp->constant) ||
761 __put_user(txc.precision, &utp->precision) ||
762 __put_user(txc.tolerance, &utp->tolerance) ||
763 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
764 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
765 __put_user(txc.tick, &utp->tick) ||
766 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
767 __put_user(txc.jitter, &utp->jitter) ||
768 __put_user(txc.shift, &utp->shift) ||
769 __put_user(txc.stabil, &utp->stabil) ||
770 __put_user(txc.jitcnt, &utp->jitcnt) ||
771 __put_user(txc.calcnt, &utp->calcnt) ||
772 __put_user(txc.errcnt, &utp->errcnt) ||
773 __put_user(txc.stbcnt, &utp->stbcnt))
774 ret = -EFAULT;
775
776 return ret;
777}
778
779#ifdef CONFIG_SYSCTL
780struct __sysctl_args32 {
781 u32 name;
782 int nlen;
783 u32 oldval;
784 u32 oldlenp;
785 u32 newval;
786 u32 newlen;
787 u32 __unused[4];
788};
789
790asmlinkage long sys32_sysctl(struct __sysctl_args32 *args)
791{
792 struct __sysctl_args32 tmp;
793 int error;
794 size_t oldlen, *oldlenp = NULL;
795 unsigned long addr = (((long)&args->__unused[0]) + 7) & ~7;
796
797 if (copy_from_user(&tmp, args, sizeof(tmp)))
798 return -EFAULT;
799
800 if (tmp.oldval && tmp.oldlenp) {
801 /* Duh, this is ugly and might not work if sysctl_args
802 is in read-only memory, but do_sysctl does indirectly
803 a lot of uaccess in both directions and we'd have to
804 basically copy the whole sysctl.c here, and
805 glibc's __sysctl uses rw memory for the structure
806 anyway. */
807 if (get_user(oldlen, (u32 *)A(tmp.oldlenp)) ||
808 put_user(oldlen, (size_t *)addr))
809 return -EFAULT;
810 oldlenp = (size_t *)addr;
811 }
812
813 lock_kernel();
814 error = do_sysctl((int *)A(tmp.name), tmp.nlen, (void *)A(tmp.oldval),
815 oldlenp, (void *)A(tmp.newval), tmp.newlen);
816 unlock_kernel();
817 if (oldlenp) {
818 if (!error) {
819 if (get_user(oldlen, (size_t *)addr) ||
820 put_user(oldlen, (u32 *)A(tmp.oldlenp)))
821 error = -EFAULT;
822 }
823 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
824 }
825 return error;
826}
827#endif
828
829struct stat64_emu31 {
830 unsigned long long st_dev;
831 unsigned int __pad1;
832#define STAT64_HAS_BROKEN_ST_INO 1
833 u32 __st_ino;
834 unsigned int st_mode;
835 unsigned int st_nlink;
836 u32 st_uid;
837 u32 st_gid;
838 unsigned long long st_rdev;
839 unsigned int __pad3;
840 long st_size;
841 u32 st_blksize;
842 unsigned char __pad4[4];
843 u32 __pad5; /* future possible st_blocks high bits */
844 u32 st_blocks; /* Number 512-byte blocks allocated. */
845 u32 st_atime;
846 u32 __pad6;
847 u32 st_mtime;
848 u32 __pad7;
849 u32 st_ctime;
850 u32 __pad8; /* will be high 32 bits of ctime someday */
851 unsigned long st_ino;
852};
853
854static int cp_stat64(struct stat64_emu31 *ubuf, struct kstat *stat)
855{
856 struct stat64_emu31 tmp;
857
858 memset(&tmp, 0, sizeof(tmp));
859
860 tmp.st_dev = huge_encode_dev(stat->dev);
861 tmp.st_ino = stat->ino;
862 tmp.__st_ino = (u32)stat->ino;
863 tmp.st_mode = stat->mode;
864 tmp.st_nlink = (unsigned int)stat->nlink;
865 tmp.st_uid = stat->uid;
866 tmp.st_gid = stat->gid;
867 tmp.st_rdev = huge_encode_dev(stat->rdev);
868 tmp.st_size = stat->size;
869 tmp.st_blksize = (u32)stat->blksize;
870 tmp.st_blocks = (u32)stat->blocks;
871 tmp.st_atime = (u32)stat->atime.tv_sec;
872 tmp.st_mtime = (u32)stat->mtime.tv_sec;
873 tmp.st_ctime = (u32)stat->ctime.tv_sec;
874
875 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
876}
877
878asmlinkage long sys32_stat64(char * filename, struct stat64_emu31 * statbuf)
879{
880 struct kstat stat;
881 int ret = vfs_stat(filename, &stat);
882 if (!ret)
883 ret = cp_stat64(statbuf, &stat);
884 return ret;
885}
886
887asmlinkage long sys32_lstat64(char * filename, struct stat64_emu31 * statbuf)
888{
889 struct kstat stat;
890 int ret = vfs_lstat(filename, &stat);
891 if (!ret)
892 ret = cp_stat64(statbuf, &stat);
893 return ret;
894}
895
896asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 * statbuf)
897{
898 struct kstat stat;
899 int ret = vfs_fstat(fd, &stat);
900 if (!ret)
901 ret = cp_stat64(statbuf, &stat);
902 return ret;
903}
904
905/*
906 * Linux/i386 didn't use to be able to handle more than
907 * 4 system call parameters, so these system calls used a memory
908 * block for parameter passing..
909 */
910
911struct mmap_arg_struct_emu31 {
912 u32 addr;
913 u32 len;
914 u32 prot;
915 u32 flags;
916 u32 fd;
917 u32 offset;
918};
919
920/* common code for old and new mmaps */
921static inline long do_mmap2(
922 unsigned long addr, unsigned long len,
923 unsigned long prot, unsigned long flags,
924 unsigned long fd, unsigned long pgoff)
925{
926 struct file * file = NULL;
927 unsigned long error = -EBADF;
928
929 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
930 if (!(flags & MAP_ANONYMOUS)) {
931 file = fget(fd);
932 if (!file)
933 goto out;
934 }
935
936 down_write(&current->mm->mmap_sem);
937 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
938 if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
939 /* Result is out of bounds. */
940 do_munmap(current->mm, addr, len);
941 error = -ENOMEM;
942 }
943 up_write(&current->mm->mmap_sem);
944
945 if (file)
946 fput(file);
947out:
948 return error;
949}
950
951
952asmlinkage unsigned long
953old32_mmap(struct mmap_arg_struct_emu31 *arg)
954{
955 struct mmap_arg_struct_emu31 a;
956 int error = -EFAULT;
957
958 if (copy_from_user(&a, arg, sizeof(a)))
959 goto out;
960
961 error = -EINVAL;
962 if (a.offset & ~PAGE_MASK)
963 goto out;
964
965 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
966out:
967 return error;
968}
969
970asmlinkage long
971sys32_mmap2(struct mmap_arg_struct_emu31 *arg)
972{
973 struct mmap_arg_struct_emu31 a;
974 int error = -EFAULT;
975
976 if (copy_from_user(&a, arg, sizeof(a)))
977 goto out;
978 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
979out:
980 return error;
981}
982
983asmlinkage long sys32_read(unsigned int fd, char * buf, size_t count)
984{
985 if ((compat_ssize_t) count < 0)
986 return -EINVAL;
987
988 return sys_read(fd, buf, count);
989}
990
991asmlinkage long sys32_write(unsigned int fd, char * buf, size_t count)
992{
993 if ((compat_ssize_t) count < 0)
994 return -EINVAL;
995
996 return sys_write(fd, buf, count);
997}
998
999asmlinkage long sys32_clone(struct pt_regs regs)
1000{
1001 unsigned long clone_flags;
1002 unsigned long newsp;
1003 int *parent_tidptr, *child_tidptr;
1004
1005 clone_flags = regs.gprs[3] & 0xffffffffUL;
1006 newsp = regs.orig_gpr2 & 0x7fffffffUL;
1007 parent_tidptr = (int *) (regs.gprs[4] & 0x7fffffffUL);
1008 child_tidptr = (int *) (regs.gprs[5] & 0x7fffffffUL);
1009 if (!newsp)
1010 newsp = regs.gprs[15];
1011 return do_fork(clone_flags, newsp, &regs, 0,
1012 parent_tidptr, child_tidptr);
1013}
1014
1015/*
1016 * Wrapper function for sys_timer_create.
1017 */
1018extern asmlinkage long
1019sys_timer_create(clockid_t, struct sigevent *, timer_t *);
1020
1021asmlinkage long
1022sys32_timer_create(clockid_t which_clock, struct compat_sigevent *se32,
1023 timer_t *timer_id)
1024{
1025 struct sigevent se;
1026 timer_t ktimer_id;
1027 mm_segment_t old_fs;
1028 long ret;
1029
1030 if (se32 == NULL)
1031 return sys_timer_create(which_clock, NULL, timer_id);
1032
1033 if (get_compat_sigevent(&se, se32))
1034 return -EFAULT;
1035
1036 old_fs = get_fs();
1037 set_fs(KERNEL_DS);
1038 ret = sys_timer_create(which_clock, &se, &ktimer_id);
1039 set_fs(old_fs);
1040
1041 if (!ret)
1042 ret = put_user (ktimer_id, timer_id);
1043
1044 return ret;
1045}
Linux 6.x block layer and io_uring tree(s)