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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial
[mirror_ubuntu-hirsute-kernel.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
1da177e4
LT		 19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/fs.h>
22#include <linux/mm.h>
23#include <linux/file.h>
24#include <linux/signal.h>
25#include <linux/resource.h>
26#include <linux/times.h>
27#include <linux/utsname.h>
1da177e4
LT		 28#include <linux/smp.h>
29#include <linux/smp_lock.h>
30#include <linux/sem.h>
31#include <linux/msg.h>
32#include <linux/shm.h>
33#include <linux/slab.h>
34#include <linux/uio.h>
35#include <linux/nfs_fs.h>
36#include <linux/quota.h>
37#include <linux/module.h>
38#include <linux/sunrpc/svc.h>
39#include <linux/nfsd/nfsd.h>
40#include <linux/nfsd/cache.h>
41#include <linux/nfsd/xdr.h>
42#include <linux/nfsd/syscall.h>
43#include <linux/poll.h>
44#include <linux/personality.h>
45#include <linux/stat.h>
46#include <linux/filter.h>
47#include <linux/highmem.h>
48#include <linux/highuid.h>
49#include <linux/mman.h>
50#include <linux/ipv6.h>
51#include <linux/in.h>
52#include <linux/icmpv6.h>
53#include <linux/syscalls.h>
54#include <linux/sysctl.h>
55#include <linux/binfmts.h>
a9415644 56#include <linux/capability.h>
1da177e4
LT		 57#include <linux/compat.h>
58#include <linux/vfs.h>
59#include <linux/ptrace.h>
068e1b94 60#include <linux/fadvise.h>
1da177e4
LT		 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
24954a14 101asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
1da177e4
LT		 102{
103 return sys_chown(filename, low2highuid(user), low2highgid(group));
104}
105
24954a14 106asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
1da177e4
LT		 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
24954a14 142asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
1da177e4
LT		 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
24954a14 159asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
1da177e4
LT		 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
24954a14 180static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
1da177e4
LT		 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
24954a14 194static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
1da177e4
LT		 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
24954a14 208asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
1da177e4
LT		 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
24954a14 232asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
1da177e4
LT		 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
24954a14 279static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
1da177e4 280{
a63a4931 281 return (!access_ok(VERIFY_READ, o, sizeof(*o)) ||
1da177e4
LT		 282 (__get_user(o->tv_sec, &i->tv_sec) ||
283 __get_user(o->tv_usec, &i->tv_usec)));
284}
285
24954a14 286static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
1da177e4
LT		 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
24954a14 342asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
1da177e4
LT		 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
24954a14 358int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
1da177e4 359{
afefdbb2 360 compat_ino_t ino;
1da177e4
LT		 361 int err;
362
363 if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
364 return -EOVERFLOW;
365
afefdbb2
DH		 366 ino = stat->ino;
367 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
368 return -EOVERFLOW;
369
1da177e4
LT		 370 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
371 err |= put_user(stat->ino, &statbuf->st_ino);
372 err |= put_user(stat->mode, &statbuf->st_mode);
373 err |= put_user(stat->nlink, &statbuf->st_nlink);
374 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
375 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
376 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
377 err |= put_user(stat->size, &statbuf->st_size);
378 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
379 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
380 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
381 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
382 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
383 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
384 err |= put_user(stat->blksize, &statbuf->st_blksize);
385 err |= put_user(stat->blocks, &statbuf->st_blocks);
386/* fixme
387 err |= put_user(0, &statbuf->__unused4[0]);
388 err |= put_user(0, &statbuf->__unused4[1]);
389*/
390 return err;
391}
392
393struct sysinfo32 {
394 s32 uptime;
395 u32 loads[3];
396 u32 totalram;
397 u32 freeram;
398 u32 sharedram;
399 u32 bufferram;
400 u32 totalswap;
401 u32 freeswap;
402 unsigned short procs;
403 unsigned short pads;
404 u32 totalhigh;
405 u32 freehigh;
406 unsigned int mem_unit;
407 char _f[8];
408};
409
410asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
411{
412 struct sysinfo s;
413 int ret, err;
414 mm_segment_t old_fs = get_fs ();
415
416 set_fs (KERNEL_DS);
d2c993d8 417 ret = sys_sysinfo((struct sysinfo __user *) &s);
1da177e4
LT		 418 set_fs (old_fs);
419 err = put_user (s.uptime, &info->uptime);
420 err |= __put_user (s.loads[0], &info->loads[0]);
421 err |= __put_user (s.loads[1], &info->loads[1]);
422 err |= __put_user (s.loads[2], &info->loads[2]);
423 err |= __put_user (s.totalram, &info->totalram);
424 err |= __put_user (s.freeram, &info->freeram);
425 err |= __put_user (s.sharedram, &info->sharedram);
426 err |= __put_user (s.bufferram, &info->bufferram);
427 err |= __put_user (s.totalswap, &info->totalswap);
428 err |= __put_user (s.freeswap, &info->freeswap);
429 err |= __put_user (s.procs, &info->procs);
430 err |= __put_user (s.totalhigh, &info->totalhigh);
431 err |= __put_user (s.freehigh, &info->freehigh);
432 err |= __put_user (s.mem_unit, &info->mem_unit);
433 if (err)
434 return -EFAULT;
435 return ret;
436}
437
438asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
439 struct compat_timespec __user *interval)
440{
441 struct timespec t;
442 int ret;
443 mm_segment_t old_fs = get_fs ();
444
445 set_fs (KERNEL_DS);
d2c993d8 446 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
1da177e4
LT		 447 set_fs (old_fs);
448 if (put_compat_timespec(&t, interval))
449 return -EFAULT;
450 return ret;
451}
452
453asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
454 compat_sigset_t __user *oset, size_t sigsetsize)
455{
456 sigset_t s;
457 compat_sigset_t s32;
458 int ret;
459 mm_segment_t old_fs = get_fs();
460
461 if (set) {
462 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
463 return -EFAULT;
464 switch (_NSIG_WORDS) {
465 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
466 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
467 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
468 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
469 }
470 }
471 set_fs (KERNEL_DS);
d2c993d8
HC		 472 ret = sys_rt_sigprocmask(how,
473 set ? (sigset_t __user *) &s : NULL,
474 oset ? (sigset_t __user *) &s : NULL,
475 sigsetsize);
1da177e4
LT		 476 set_fs (old_fs);
477 if (ret) return ret;
478 if (oset) {
479 switch (_NSIG_WORDS) {
480 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
481 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
482 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
483 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
484 }
485 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
486 return -EFAULT;
487 }
488 return 0;
489}
490
491asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
492 size_t sigsetsize)
493{
494 sigset_t s;
495 compat_sigset_t s32;
496 int ret;
497 mm_segment_t old_fs = get_fs();
498
499 set_fs (KERNEL_DS);
d2c993d8 500 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
1da177e4
LT		 501 set_fs (old_fs);
502 if (!ret) {
503 switch (_NSIG_WORDS) {
504 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
505 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
506 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
507 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
508 }
509 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
510 return -EFAULT;
511 }
512 return ret;
513}
514
515asmlinkage long
516sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
517{
518 siginfo_t info;
519 int ret;
520 mm_segment_t old_fs = get_fs();
521
522 if (copy_siginfo_from_user32(&info, uinfo))
523 return -EFAULT;
524 set_fs (KERNEL_DS);
d2c993d8 525 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
1da177e4
LT		 526 set_fs (old_fs);
527 return ret;
528}
529
530/*
531 * sys32_execve() executes a new program after the asm stub has set
532 * things up for us. This should basically do what I want it to.
533 */
534asmlinkage long
535sys32_execve(struct pt_regs regs)
536{
537 int error;
538 char * filename;
539
540 filename = getname(compat_ptr(regs.orig_gpr2));
541 error = PTR_ERR(filename);
542 if (IS_ERR(filename))
543 goto out;
544 error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
545 compat_ptr(regs.gprs[4]), &regs);
546 if (error == 0)
547 {
548 task_lock(current);
549 current->ptrace &= ~PT_DTRACE;
550 task_unlock(current);
551 current->thread.fp_regs.fpc=0;
94c12cc7 552 asm volatile("sfpc %0,0" : : "d" (0));
1da177e4
LT		 553 }
554 putname(filename);
555out:
556 return error;
557}
558
559
560#ifdef CONFIG_MODULES
561
562asmlinkage long
563sys32_init_module(void __user *umod, unsigned long len,
564 const char __user *uargs)
565{
566 return sys_init_module(umod, len, uargs);
567}
568
569asmlinkage long
570sys32_delete_module(const char __user *name_user, unsigned int flags)
571{
572 return sys_delete_module(name_user, flags);
573}
574
575#else /* CONFIG_MODULES */
576
577asmlinkage long
578sys32_init_module(void __user *umod, unsigned long len,
579 const char __user *uargs)
580{
581 return -ENOSYS;
582}
583
584asmlinkage long
585sys32_delete_module(const char __user *name_user, unsigned int flags)
586{
587 return -ENOSYS;
588}
589
590#endif /* CONFIG_MODULES */
591
592/* Translations due to time_t size differences. Which affects all
593 sorts of things, like timeval and itimerval. */
594
595extern struct timezone sys_tz;
596
24954a14 597asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 598{
599 if (tv) {
600 struct timeval ktv;
601 do_gettimeofday(&ktv);
602 if (put_tv32(tv, &ktv))
603 return -EFAULT;
604 }
605 if (tz) {
606 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
607 return -EFAULT;
608 }
609 return 0;
610}
611
24954a14 612static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
1da177e4
LT		 613{
614 long usec;
615
616 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
617 return -EFAULT;
618 if (__get_user(o->tv_sec, &i->tv_sec))
619 return -EFAULT;
620 if (__get_user(usec, &i->tv_usec))
621 return -EFAULT;
622 o->tv_nsec = usec * 1000;
623 return 0;
624}
625
24954a14 626asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 627{
628 struct timespec kts;
629 struct timezone ktz;
630
631 if (tv) {
632 if (get_ts32(&kts, tv))
633 return -EFAULT;
634 }
635 if (tz) {
636 if (copy_from_user(&ktz, tz, sizeof(ktz)))
637 return -EFAULT;
638 }
639
640 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
641}
642
643/* These are here just in case some old sparc32 binary calls it. */
644asmlinkage long sys32_pause(void)
645{
646 current->state = TASK_INTERRUPTIBLE;
647 schedule();
648 return -ERESTARTNOHAND;
649}
650
24954a14 651asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
1da177e4
LT		 652 size_t count, u32 poshi, u32 poslo)
653{
654 if ((compat_ssize_t) count < 0)
655 return -EINVAL;
656 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
657}
658
24954a14 659asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
1da177e4
LT		 660 size_t count, u32 poshi, u32 poslo)
661{
662 if ((compat_ssize_t) count < 0)
663 return -EINVAL;
664 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
665}
666
667asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
668{
669 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
670}
671
24954a14 672asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
1da177e4
LT		 673{
674 mm_segment_t old_fs = get_fs();
675 int ret;
676 off_t of;
677
678 if (offset && get_user(of, offset))
679 return -EFAULT;
680
681 set_fs(KERNEL_DS);
d2c993d8
HC		 682 ret = sys_sendfile(out_fd, in_fd,
683 offset ? (off_t __user *) &of : NULL, count);
1da177e4
LT		 684 set_fs(old_fs);
685
83b942bd 686 if (offset && put_user(of, offset))
1da177e4
LT		 687 return -EFAULT;
688
689 return ret;
690}
691
692asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
24954a14 693 compat_loff_t __user *offset, s32 count)
1da177e4
LT		 694{
695 mm_segment_t old_fs = get_fs();
696 int ret;
697 loff_t lof;
698
699 if (offset && get_user(lof, offset))
700 return -EFAULT;
701
702 set_fs(KERNEL_DS);
d2c993d8
HC		 703 ret = sys_sendfile64(out_fd, in_fd,
704 offset ? (loff_t __user *) &lof : NULL, count);
1da177e4
LT		 705 set_fs(old_fs);
706
707 if (offset && put_user(lof, offset))
708 return -EFAULT;
709
710 return ret;
711}
712
b89a8171 713#ifdef CONFIG_SYSCTL_SYSCALL
1da177e4
LT		 714struct __sysctl_args32 {
715 u32 name;
716 int nlen;
717 u32 oldval;
718 u32 oldlenp;
719 u32 newval;
720 u32 newlen;
721 u32 __unused[4];
722};
723
24954a14 724asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1da177e4
LT		 725{
726 struct __sysctl_args32 tmp;
727 int error;
24954a14
AV		 728 size_t oldlen;
729 size_t __user *oldlenp = NULL;
730 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1da177e4
LT		 731
732 if (copy_from_user(&tmp, args, sizeof(tmp)))
733 return -EFAULT;
734
735 if (tmp.oldval && tmp.oldlenp) {
736 /* Duh, this is ugly and might not work if sysctl_args
737 is in read-only memory, but do_sysctl does indirectly
738 a lot of uaccess in both directions and we'd have to
739 basically copy the whole sysctl.c here, and
740 glibc's __sysctl uses rw memory for the structure
741 anyway. */
24954a14
AV		 742 if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) ||
743 put_user(oldlen, (size_t __user *)addr))
1da177e4 744 return -EFAULT;
24954a14 745 oldlenp = (size_t __user *)addr;
1da177e4
LT		 746 }
747
748 lock_kernel();
24954a14
AV		 749 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
750 oldlenp, compat_ptr(tmp.newval), tmp.newlen);
1da177e4
LT		 751 unlock_kernel();
752 if (oldlenp) {
753 if (!error) {
24954a14
AV		 754 if (get_user(oldlen, (size_t __user *)addr) ||
755 put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
1da177e4
LT		 756 error = -EFAULT;
757 }
758 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
759 }
760 return error;
761}
762#endif
763
764struct stat64_emu31 {
765 unsigned long long st_dev;
766 unsigned int __pad1;
767#define STAT64_HAS_BROKEN_ST_INO 1
768 u32 __st_ino;
769 unsigned int st_mode;
770 unsigned int st_nlink;
771 u32 st_uid;
772 u32 st_gid;
773 unsigned long long st_rdev;
774 unsigned int __pad3;
775 long st_size;
776 u32 st_blksize;
777 unsigned char __pad4[4];
778 u32 __pad5; /* future possible st_blocks high bits */
779 u32 st_blocks; /* Number 512-byte blocks allocated. */
780 u32 st_atime;
781 u32 __pad6;
782 u32 st_mtime;
783 u32 __pad7;
784 u32 st_ctime;
785 u32 __pad8; /* will be high 32 bits of ctime someday */
786 unsigned long st_ino;
787};
788
24954a14 789static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
1da177e4
LT		 790{
791 struct stat64_emu31 tmp;
792
793 memset(&tmp, 0, sizeof(tmp));
794
795 tmp.st_dev = huge_encode_dev(stat->dev);
796 tmp.st_ino = stat->ino;
797 tmp.__st_ino = (u32)stat->ino;
798 tmp.st_mode = stat->mode;
799 tmp.st_nlink = (unsigned int)stat->nlink;
800 tmp.st_uid = stat->uid;
801 tmp.st_gid = stat->gid;
802 tmp.st_rdev = huge_encode_dev(stat->rdev);
803 tmp.st_size = stat->size;
804 tmp.st_blksize = (u32)stat->blksize;
805 tmp.st_blocks = (u32)stat->blocks;
806 tmp.st_atime = (u32)stat->atime.tv_sec;
807 tmp.st_mtime = (u32)stat->mtime.tv_sec;
808 tmp.st_ctime = (u32)stat->ctime.tv_sec;
809
810 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
811}
812
24954a14 813asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 814{
815 struct kstat stat;
816 int ret = vfs_stat(filename, &stat);
817 if (!ret)
818 ret = cp_stat64(statbuf, &stat);
819 return ret;
820}
821
24954a14 822asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 823{
824 struct kstat stat;
825 int ret = vfs_lstat(filename, &stat);
826 if (!ret)
827 ret = cp_stat64(statbuf, &stat);
828 return ret;
829}
830
24954a14 831asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 832{
833 struct kstat stat;
834 int ret = vfs_fstat(fd, &stat);
835 if (!ret)
836 ret = cp_stat64(statbuf, &stat);
837 return ret;
838}
839
ed3d021b
HC		 840asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
841 struct stat64_emu31 __user* statbuf, int flag)
19bf9cbf
HC		 842{
843 struct kstat stat;
844 int error = -EINVAL;
845
846 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
847 goto out;
848
849 if (flag & AT_SYMLINK_NOFOLLOW)
850 error = vfs_lstat_fd(dfd, filename, &stat);
851 else
852 error = vfs_stat_fd(dfd, filename, &stat);
853
854 if (!error)
855 error = cp_stat64(statbuf, &stat);
856out:
857 return error;
858}
859
1da177e4
LT		 860/*
861 * Linux/i386 didn't use to be able to handle more than
862 * 4 system call parameters, so these system calls used a memory
863 * block for parameter passing..
864 */
865
866struct mmap_arg_struct_emu31 {
867 u32 addr;
868 u32 len;
869 u32 prot;
870 u32 flags;
871 u32 fd;
872 u32 offset;
873};
874
875/* common code for old and new mmaps */
876static inline long do_mmap2(
877 unsigned long addr, unsigned long len,
878 unsigned long prot, unsigned long flags,
879 unsigned long fd, unsigned long pgoff)
880{
881 struct file * file = NULL;
882 unsigned long error = -EBADF;
883
884 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
885 if (!(flags & MAP_ANONYMOUS)) {
886 file = fget(fd);
887 if (!file)
888 goto out;
889 }
890
891 down_write(&current->mm->mmap_sem);
892 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
893 if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
894 /* Result is out of bounds. */
895 do_munmap(current->mm, addr, len);
896 error = -ENOMEM;
897 }
898 up_write(&current->mm->mmap_sem);
899
900 if (file)
901 fput(file);
902out:
903 return error;
904}
905
906
907asmlinkage unsigned long
24954a14 908old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 909{
910 struct mmap_arg_struct_emu31 a;
911 int error = -EFAULT;
912
913 if (copy_from_user(&a, arg, sizeof(a)))
914 goto out;
915
916 error = -EINVAL;
917 if (a.offset & ~PAGE_MASK)
918 goto out;
919
920 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
921out:
922 return error;
923}
924
925asmlinkage long
24954a14 926sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 927{
928 struct mmap_arg_struct_emu31 a;
929 int error = -EFAULT;
930
931 if (copy_from_user(&a, arg, sizeof(a)))
932 goto out;
933 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
934out:
935 return error;
936}
937
24954a14 938asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 939{
940 if ((compat_ssize_t) count < 0)
941 return -EINVAL;
942
943 return sys_read(fd, buf, count);
944}
945
24954a14 946asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 947{
948 if ((compat_ssize_t) count < 0)
949 return -EINVAL;
950
951 return sys_write(fd, buf, count);
952}
953
954asmlinkage long sys32_clone(struct pt_regs regs)
955{
956 unsigned long clone_flags;
957 unsigned long newsp;
24954a14 958 int __user *parent_tidptr, *child_tidptr;
1da177e4
LT		 959
960 clone_flags = regs.gprs[3] & 0xffffffffUL;
961 newsp = regs.orig_gpr2 & 0x7fffffffUL;
24954a14
AV		 962 parent_tidptr = compat_ptr(regs.gprs[4]);
963 child_tidptr = compat_ptr(regs.gprs[5]);
1da177e4
LT		 964 if (!newsp)
965 newsp = regs.gprs[15];
966 return do_fork(clone_flags, newsp, &regs, 0,
967 parent_tidptr, child_tidptr);
968}
969
068e1b94
MS		 970/*
971 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
972 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
973 * because the 31 bit values differ from the 64 bit values.
974 */
975
976asmlinkage long
977sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
978{
979 if (advise == 4)
980 advise = POSIX_FADV_DONTNEED;
981 else if (advise == 5)
982 advise = POSIX_FADV_NOREUSE;
983 return sys_fadvise64(fd, offset, len, advise);
984}
985
986struct fadvise64_64_args {
987 int fd;
988 long long offset;
989 long long len;
990 int advice;
991};
992
993asmlinkage long
994sys32_fadvise64_64(struct fadvise64_64_args __user *args)
995{
996 struct fadvise64_64_args a;
997
998 if ( copy_from_user(&a, args, sizeof(a)) )
999 return -EFAULT;
1000 if (a.advice == 4)
1001 a.advice = POSIX_FADV_DONTNEED;
1002 else if (a.advice == 5)
1003 a.advice = POSIX_FADV_NOREUSE;
1004 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
1005}
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