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[PATCH] Common compat_sys_sysinfo
[deliverable/linux.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
c1821c2e
GS		 72long psw_user32_bits = (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
73 PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
74 PSW_MASK_PSTATE | PSW_DEFAULT_KEY);
75long psw32_user_bits = (PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME |
76 PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK |
77 PSW32_MASK_PSTATE);
1da177e4
LT		 78
79/* For this source file, we want overflow handling. */
80
81#undef high2lowuid
82#undef high2lowgid
83#undef low2highuid
84#undef low2highgid
85#undef SET_UID16
86#undef SET_GID16
87#undef NEW_TO_OLD_UID
88#undef NEW_TO_OLD_GID
89#undef SET_OLDSTAT_UID
90#undef SET_OLDSTAT_GID
91#undef SET_STAT_UID
92#undef SET_STAT_GID
93
94#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
95#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
96#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
97#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
98#define SET_UID16(var, uid) var = high2lowuid(uid)
99#define SET_GID16(var, gid) var = high2lowgid(gid)
100#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
101#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
102#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
103#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
104#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
105#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
106
24954a14 107asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
1da177e4
LT		 108{
109 return sys_chown(filename, low2highuid(user), low2highgid(group));
110}
111
24954a14 112asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
1da177e4
LT		 113{
114 return sys_lchown(filename, low2highuid(user), low2highgid(group));
115}
116
117asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
118{
119 return sys_fchown(fd, low2highuid(user), low2highgid(group));
120}
121
122asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
123{
124 return sys_setregid(low2highgid(rgid), low2highgid(egid));
125}
126
127asmlinkage long sys32_setgid16(u16 gid)
128{
129 return sys_setgid((gid_t)gid);
130}
131
132asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
133{
134 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
135}
136
137asmlinkage long sys32_setuid16(u16 uid)
138{
139 return sys_setuid((uid_t)uid);
140}
141
142asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
143{
144 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
145 low2highuid(suid));
146}
147
24954a14 148asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid)
1da177e4
LT		 149{
150 int retval;
151
152 if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
153 !(retval = put_user(high2lowuid(current->euid), euid)))
154 retval = put_user(high2lowuid(current->suid), suid);
155
156 return retval;
157}
158
159asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
160{
161 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
162 low2highgid(sgid));
163}
164
24954a14 165asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
1da177e4
LT		 166{
167 int retval;
168
169 if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
170 !(retval = put_user(high2lowgid(current->egid), egid)))
171 retval = put_user(high2lowgid(current->sgid), sgid);
172
173 return retval;
174}
175
176asmlinkage long sys32_setfsuid16(u16 uid)
177{
178 return sys_setfsuid((uid_t)uid);
179}
180
181asmlinkage long sys32_setfsgid16(u16 gid)
182{
183 return sys_setfsgid((gid_t)gid);
184}
185
24954a14 186static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
1da177e4
LT		 187{
188 int i;
189 u16 group;
190
191 for (i = 0; i < group_info->ngroups; i++) {
192 group = (u16)GROUP_AT(group_info, i);
193 if (put_user(group, grouplist+i))
194 return -EFAULT;
195 }
196
197 return 0;
198}
199
24954a14 200static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
1da177e4
LT		 201{
202 int i;
203 u16 group;
204
205 for (i = 0; i < group_info->ngroups; i++) {
206 if (get_user(group, grouplist+i))
207 return -EFAULT;
208 GROUP_AT(group_info, i) = (gid_t)group;
209 }
210
211 return 0;
212}
213
24954a14 214asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
1da177e4
LT		 215{
216 int i;
217
218 if (gidsetsize < 0)
219 return -EINVAL;
220
221 get_group_info(current->group_info);
222 i = current->group_info->ngroups;
223 if (gidsetsize) {
224 if (i > gidsetsize) {
225 i = -EINVAL;
226 goto out;
227 }
228 if (groups16_to_user(grouplist, current->group_info)) {
229 i = -EFAULT;
230 goto out;
231 }
232 }
233out:
234 put_group_info(current->group_info);
235 return i;
236}
237
24954a14 238asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
1da177e4
LT		 239{
240 struct group_info *group_info;
241 int retval;
242
243 if (!capable(CAP_SETGID))
244 return -EPERM;
245 if ((unsigned)gidsetsize > NGROUPS_MAX)
246 return -EINVAL;
247
248 group_info = groups_alloc(gidsetsize);
249 if (!group_info)
250 return -ENOMEM;
251 retval = groups16_from_user(group_info, grouplist);
252 if (retval) {
253 put_group_info(group_info);
254 return retval;
255 }
256
257 retval = set_current_groups(group_info);
258 put_group_info(group_info);
259
260 return retval;
261}
262
263asmlinkage long sys32_getuid16(void)
264{
265 return high2lowuid(current->uid);
266}
267
268asmlinkage long sys32_geteuid16(void)
269{
270 return high2lowuid(current->euid);
271}
272
273asmlinkage long sys32_getgid16(void)
274{
275 return high2lowgid(current->gid);
276}
277
278asmlinkage long sys32_getegid16(void)
279{
280 return high2lowgid(current->egid);
281}
282
283/* 32-bit timeval and related flotsam. */
284
24954a14 285static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
1da177e4 286{
a63a4931 287 return (!access_ok(VERIFY_READ, o, sizeof(*o)) ||
1da177e4
LT		 288 (__get_user(o->tv_sec, &i->tv_sec) ||
289 __get_user(o->tv_usec, &i->tv_usec)));
290}
291
24954a14 292static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
1da177e4
LT		 293{
294 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
295 (__put_user(i->tv_sec, &o->tv_sec) ||
296 __put_user(i->tv_usec, &o->tv_usec)));
297}
298
299/*
300 * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
301 *
302 * This is really horribly ugly.
303 */
1df23957 304#ifdef CONFIG_SYSVIPC
1da177e4
LT		 305asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
306{
307 if (call >> 16) /* hack for backward compatibility */
308 return -EINVAL;
309
310 call &= 0xffff;
311
312 switch (call) {
313 case SEMTIMEDOP:
314 return compat_sys_semtimedop(first, compat_ptr(ptr),
315 second, compat_ptr(third));
316 case SEMOP:
317 /* struct sembuf is the same on 32 and 64bit :)) */
318 return sys_semtimedop(first, compat_ptr(ptr),
319 second, NULL);
320 case SEMGET:
321 return sys_semget(first, second, third);
322 case SEMCTL:
323 return compat_sys_semctl(first, second, third,
324 compat_ptr(ptr));
325 case MSGSND:
326 return compat_sys_msgsnd(first, second, third,
327 compat_ptr(ptr));
328 case MSGRCV:
329 return compat_sys_msgrcv(first, second, 0, third,
330 0, compat_ptr(ptr));
331 case MSGGET:
332 return sys_msgget((key_t) first, second);
333 case MSGCTL:
334 return compat_sys_msgctl(first, second, compat_ptr(ptr));
335 case SHMAT:
336 return compat_sys_shmat(first, second, third,
337 0, compat_ptr(ptr));
338 case SHMDT:
339 return sys_shmdt(compat_ptr(ptr));
340 case SHMGET:
341 return sys_shmget(first, (unsigned)second, third);
342 case SHMCTL:
343 return compat_sys_shmctl(first, second, compat_ptr(ptr));
344 }
345
346 return -ENOSYS;
347}
1df23957 348#endif
1da177e4 349
24954a14 350asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
1da177e4
LT		 351{
352 if ((int)high < 0)
353 return -EINVAL;
354 else
355 return sys_truncate(path, (high << 32) | low);
356}
357
358asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
359{
360 if ((int)high < 0)
361 return -EINVAL;
362 else
363 return sys_ftruncate(fd, (high << 32) | low);
364}
365
24954a14 366int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
1da177e4 367{
afefdbb2 368 compat_ino_t ino;
1da177e4
LT		 369 int err;
370
371 if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
372 return -EOVERFLOW;
373
afefdbb2
DH		 374 ino = stat->ino;
375 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
376 return -EOVERFLOW;
377
1da177e4
LT		 378 err = put_user(old_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(high2lowuid(stat->uid), &statbuf->st_uid);
383 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
384 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
385 err |= put_user(stat->size, &statbuf->st_size);
386 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
387 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
388 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
389 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
390 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
391 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
392 err |= put_user(stat->blksize, &statbuf->st_blksize);
393 err |= put_user(stat->blocks, &statbuf->st_blocks);
394/* fixme
395 err |= put_user(0, &statbuf->__unused4[0]);
396 err |= put_user(0, &statbuf->__unused4[1]);
397*/
398 return err;
399}
400
1da177e4
LT		 401asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
402 struct compat_timespec __user *interval)
403{
404 struct timespec t;
405 int ret;
406 mm_segment_t old_fs = get_fs ();
407
408 set_fs (KERNEL_DS);
2b67fc46
HC		 409 ret = sys_sched_rr_get_interval(pid,
410 (struct timespec __force __user *) &t);
1da177e4
LT		 411 set_fs (old_fs);
412 if (put_compat_timespec(&t, interval))
413 return -EFAULT;
414 return ret;
415}
416
417asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
418 compat_sigset_t __user *oset, size_t sigsetsize)
419{
420 sigset_t s;
421 compat_sigset_t s32;
422 int ret;
423 mm_segment_t old_fs = get_fs();
424
425 if (set) {
426 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
427 return -EFAULT;
428 switch (_NSIG_WORDS) {
429 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
430 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
431 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
432 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
433 }
434 }
435 set_fs (KERNEL_DS);
d2c993d8 436 ret = sys_rt_sigprocmask(how,
2b67fc46
HC		 437 set ? (sigset_t __force __user *) &s : NULL,
438 oset ? (sigset_t __force __user *) &s : NULL,
d2c993d8 439 sigsetsize);
1da177e4
LT		 440 set_fs (old_fs);
441 if (ret) return ret;
442 if (oset) {
443 switch (_NSIG_WORDS) {
444 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
445 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
446 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
447 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
448 }
449 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
450 return -EFAULT;
451 }
452 return 0;
453}
454
455asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
456 size_t sigsetsize)
457{
458 sigset_t s;
459 compat_sigset_t s32;
460 int ret;
461 mm_segment_t old_fs = get_fs();
462
463 set_fs (KERNEL_DS);
2b67fc46 464 ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
1da177e4
LT		 465 set_fs (old_fs);
466 if (!ret) {
467 switch (_NSIG_WORDS) {
468 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
469 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
470 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
471 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
472 }
473 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
474 return -EFAULT;
475 }
476 return ret;
477}
478
479asmlinkage long
480sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
481{
482 siginfo_t info;
483 int ret;
484 mm_segment_t old_fs = get_fs();
485
486 if (copy_siginfo_from_user32(&info, uinfo))
487 return -EFAULT;
488 set_fs (KERNEL_DS);
2b67fc46 489 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
1da177e4
LT		 490 set_fs (old_fs);
491 return ret;
492}
493
494/*
495 * sys32_execve() executes a new program after the asm stub has set
496 * things up for us. This should basically do what I want it to.
497 */
498asmlinkage long
499sys32_execve(struct pt_regs regs)
500{
501 int error;
502 char * filename;
503
504 filename = getname(compat_ptr(regs.orig_gpr2));
505 error = PTR_ERR(filename);
506 if (IS_ERR(filename))
507 goto out;
508 error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
509 compat_ptr(regs.gprs[4]), &regs);
510 if (error == 0)
511 {
512 task_lock(current);
513 current->ptrace &= ~PT_DTRACE;
514 task_unlock(current);
515 current->thread.fp_regs.fpc=0;
94c12cc7 516 asm volatile("sfpc %0,0" : : "d" (0));
1da177e4
LT		 517 }
518 putname(filename);
519out:
520 return error;
521}
522
523
524#ifdef CONFIG_MODULES
525
526asmlinkage long
527sys32_init_module(void __user *umod, unsigned long len,
528 const char __user *uargs)
529{
530 return sys_init_module(umod, len, uargs);
531}
532
533asmlinkage long
534sys32_delete_module(const char __user *name_user, unsigned int flags)
535{
536 return sys_delete_module(name_user, flags);
537}
538
539#else /* CONFIG_MODULES */
540
541asmlinkage long
542sys32_init_module(void __user *umod, unsigned long len,
543 const char __user *uargs)
544{
545 return -ENOSYS;
546}
547
548asmlinkage long
549sys32_delete_module(const char __user *name_user, unsigned int flags)
550{
551 return -ENOSYS;
552}
553
554#endif /* CONFIG_MODULES */
555
556/* Translations due to time_t size differences. Which affects all
557 sorts of things, like timeval and itimerval. */
558
559extern struct timezone sys_tz;
560
24954a14 561asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 562{
563 if (tv) {
564 struct timeval ktv;
565 do_gettimeofday(&ktv);
566 if (put_tv32(tv, &ktv))
567 return -EFAULT;
568 }
569 if (tz) {
570 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
571 return -EFAULT;
572 }
573 return 0;
574}
575
24954a14 576static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
1da177e4
LT		 577{
578 long usec;
579
580 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
581 return -EFAULT;
582 if (__get_user(o->tv_sec, &i->tv_sec))
583 return -EFAULT;
584 if (__get_user(usec, &i->tv_usec))
585 return -EFAULT;
586 o->tv_nsec = usec * 1000;
587 return 0;
588}
589
24954a14 590asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 591{
592 struct timespec kts;
593 struct timezone ktz;
594
595 if (tv) {
596 if (get_ts32(&kts, tv))
597 return -EFAULT;
598 }
599 if (tz) {
600 if (copy_from_user(&ktz, tz, sizeof(ktz)))
601 return -EFAULT;
602 }
603
604 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
605}
606
607/* These are here just in case some old sparc32 binary calls it. */
608asmlinkage long sys32_pause(void)
609{
610 current->state = TASK_INTERRUPTIBLE;
611 schedule();
612 return -ERESTARTNOHAND;
613}
614
24954a14 615asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
1da177e4
LT		 616 size_t count, u32 poshi, u32 poslo)
617{
618 if ((compat_ssize_t) count < 0)
619 return -EINVAL;
620 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
621}
622
24954a14 623asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
1da177e4
LT		 624 size_t count, u32 poshi, u32 poslo)
625{
626 if ((compat_ssize_t) count < 0)
627 return -EINVAL;
628 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
629}
630
631asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
632{
633 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
634}
635
24954a14 636asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
1da177e4
LT		 637{
638 mm_segment_t old_fs = get_fs();
639 int ret;
640 off_t of;
641
642 if (offset && get_user(of, offset))
643 return -EFAULT;
644
645 set_fs(KERNEL_DS);
d2c993d8 646 ret = sys_sendfile(out_fd, in_fd,
2b67fc46 647 offset ? (off_t __force __user *) &of : NULL, count);
1da177e4
LT		 648 set_fs(old_fs);
649
83b942bd 650 if (offset && put_user(of, offset))
1da177e4
LT		 651 return -EFAULT;
652
653 return ret;
654}
655
656asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
24954a14 657 compat_loff_t __user *offset, s32 count)
1da177e4
LT		 658{
659 mm_segment_t old_fs = get_fs();
660 int ret;
661 loff_t lof;
662
663 if (offset && get_user(lof, offset))
664 return -EFAULT;
665
666 set_fs(KERNEL_DS);
d2c993d8 667 ret = sys_sendfile64(out_fd, in_fd,
2b67fc46
HC		 668 offset ? (loff_t __force __user *) &lof : NULL,
669 count);
1da177e4
LT		 670 set_fs(old_fs);
671
672 if (offset && put_user(lof, offset))
673 return -EFAULT;
674
675 return ret;
676}
677
b89a8171 678#ifdef CONFIG_SYSCTL_SYSCALL
1da177e4
LT		 679struct __sysctl_args32 {
680 u32 name;
681 int nlen;
682 u32 oldval;
683 u32 oldlenp;
684 u32 newval;
685 u32 newlen;
686 u32 __unused[4];
687};
688
24954a14 689asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1da177e4
LT		 690{
691 struct __sysctl_args32 tmp;
692 int error;
24954a14
AV		 693 size_t oldlen;
694 size_t __user *oldlenp = NULL;
695 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1da177e4
LT		 696
697 if (copy_from_user(&tmp, args, sizeof(tmp)))
698 return -EFAULT;
699
700 if (tmp.oldval && tmp.oldlenp) {
701 /* Duh, this is ugly and might not work if sysctl_args
702 is in read-only memory, but do_sysctl does indirectly
703 a lot of uaccess in both directions and we'd have to
704 basically copy the whole sysctl.c here, and
705 glibc's __sysctl uses rw memory for the structure
706 anyway. */
24954a14
AV		 707 if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) ||
708 put_user(oldlen, (size_t __user *)addr))
1da177e4 709 return -EFAULT;
24954a14 710 oldlenp = (size_t __user *)addr;
1da177e4
LT		 711 }
712
713 lock_kernel();
24954a14
AV		 714 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
715 oldlenp, compat_ptr(tmp.newval), tmp.newlen);
1da177e4
LT		 716 unlock_kernel();
717 if (oldlenp) {
718 if (!error) {
24954a14
AV		 719 if (get_user(oldlen, (size_t __user *)addr) ||
720 put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
1da177e4
LT		 721 error = -EFAULT;
722 }
12bae235
HC		 723 if (copy_to_user(args->__unused, tmp.__unused,
724 sizeof(tmp.__unused)))
725 error = -EFAULT;
1da177e4
LT		 726 }
727 return error;
728}
729#endif
730
731struct stat64_emu31 {
732 unsigned long long st_dev;
733 unsigned int __pad1;
734#define STAT64_HAS_BROKEN_ST_INO 1
735 u32 __st_ino;
736 unsigned int st_mode;
737 unsigned int st_nlink;
738 u32 st_uid;
739 u32 st_gid;
740 unsigned long long st_rdev;
741 unsigned int __pad3;
742 long st_size;
743 u32 st_blksize;
744 unsigned char __pad4[4];
745 u32 __pad5; /* future possible st_blocks high bits */
746 u32 st_blocks; /* Number 512-byte blocks allocated. */
747 u32 st_atime;
748 u32 __pad6;
749 u32 st_mtime;
750 u32 __pad7;
751 u32 st_ctime;
752 u32 __pad8; /* will be high 32 bits of ctime someday */
753 unsigned long st_ino;
754};
755
24954a14 756static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
1da177e4
LT		 757{
758 struct stat64_emu31 tmp;
759
760 memset(&tmp, 0, sizeof(tmp));
761
762 tmp.st_dev = huge_encode_dev(stat->dev);
763 tmp.st_ino = stat->ino;
764 tmp.__st_ino = (u32)stat->ino;
765 tmp.st_mode = stat->mode;
766 tmp.st_nlink = (unsigned int)stat->nlink;
767 tmp.st_uid = stat->uid;
768 tmp.st_gid = stat->gid;
769 tmp.st_rdev = huge_encode_dev(stat->rdev);
770 tmp.st_size = stat->size;
771 tmp.st_blksize = (u32)stat->blksize;
772 tmp.st_blocks = (u32)stat->blocks;
773 tmp.st_atime = (u32)stat->atime.tv_sec;
774 tmp.st_mtime = (u32)stat->mtime.tv_sec;
775 tmp.st_ctime = (u32)stat->ctime.tv_sec;
776
777 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
778}
779
24954a14 780asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 781{
782 struct kstat stat;
783 int ret = vfs_stat(filename, &stat);
784 if (!ret)
785 ret = cp_stat64(statbuf, &stat);
786 return ret;
787}
788
24954a14 789asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 790{
791 struct kstat stat;
792 int ret = vfs_lstat(filename, &stat);
793 if (!ret)
794 ret = cp_stat64(statbuf, &stat);
795 return ret;
796}
797
24954a14 798asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 799{
800 struct kstat stat;
801 int ret = vfs_fstat(fd, &stat);
802 if (!ret)
803 ret = cp_stat64(statbuf, &stat);
804 return ret;
805}
806
ed3d021b
HC		 807asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
808 struct stat64_emu31 __user* statbuf, int flag)
19bf9cbf
HC		 809{
810 struct kstat stat;
811 int error = -EINVAL;
812
813 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
814 goto out;
815
816 if (flag & AT_SYMLINK_NOFOLLOW)
817 error = vfs_lstat_fd(dfd, filename, &stat);
818 else
819 error = vfs_stat_fd(dfd, filename, &stat);
820
821 if (!error)
822 error = cp_stat64(statbuf, &stat);
823out:
824 return error;
825}
826
1da177e4
LT		 827/*
828 * Linux/i386 didn't use to be able to handle more than
829 * 4 system call parameters, so these system calls used a memory
830 * block for parameter passing..
831 */
832
833struct mmap_arg_struct_emu31 {
834 u32 addr;
835 u32 len;
836 u32 prot;
837 u32 flags;
838 u32 fd;
839 u32 offset;
840};
841
842/* common code for old and new mmaps */
843static inline long do_mmap2(
844 unsigned long addr, unsigned long len,
845 unsigned long prot, unsigned long flags,
846 unsigned long fd, unsigned long pgoff)
847{
848 struct file * file = NULL;
849 unsigned long error = -EBADF;
850
851 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
852 if (!(flags & MAP_ANONYMOUS)) {
853 file = fget(fd);
854 if (!file)
855 goto out;
856 }
857
858 down_write(&current->mm->mmap_sem);
859 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
860 if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
861 /* Result is out of bounds. */
862 do_munmap(current->mm, addr, len);
863 error = -ENOMEM;
864 }
865 up_write(&current->mm->mmap_sem);
866
867 if (file)
868 fput(file);
869out:
870 return error;
871}
872
873
874asmlinkage unsigned long
24954a14 875old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 876{
877 struct mmap_arg_struct_emu31 a;
878 int error = -EFAULT;
879
880 if (copy_from_user(&a, arg, sizeof(a)))
881 goto out;
882
883 error = -EINVAL;
884 if (a.offset & ~PAGE_MASK)
885 goto out;
886
887 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
888out:
889 return error;
890}
891
892asmlinkage long
24954a14 893sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 894{
895 struct mmap_arg_struct_emu31 a;
896 int error = -EFAULT;
897
898 if (copy_from_user(&a, arg, sizeof(a)))
899 goto out;
900 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
901out:
902 return error;
903}
904
24954a14 905asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 906{
907 if ((compat_ssize_t) count < 0)
908 return -EINVAL;
909
910 return sys_read(fd, buf, count);
911}
912
24954a14 913asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 914{
915 if ((compat_ssize_t) count < 0)
916 return -EINVAL;
917
918 return sys_write(fd, buf, count);
919}
920
921asmlinkage long sys32_clone(struct pt_regs regs)
922{
923 unsigned long clone_flags;
924 unsigned long newsp;
24954a14 925 int __user *parent_tidptr, *child_tidptr;
1da177e4
LT		 926
927 clone_flags = regs.gprs[3] & 0xffffffffUL;
928 newsp = regs.orig_gpr2 & 0x7fffffffUL;
24954a14
AV		 929 parent_tidptr = compat_ptr(regs.gprs[4]);
930 child_tidptr = compat_ptr(regs.gprs[5]);
1da177e4
LT		 931 if (!newsp)
932 newsp = regs.gprs[15];
933 return do_fork(clone_flags, newsp, &regs, 0,
934 parent_tidptr, child_tidptr);
935}
936
068e1b94
MS		 937/*
938 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
939 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
940 * because the 31 bit values differ from the 64 bit values.
941 */
942
943asmlinkage long
944sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
945{
946 if (advise == 4)
947 advise = POSIX_FADV_DONTNEED;
948 else if (advise == 5)
949 advise = POSIX_FADV_NOREUSE;
950 return sys_fadvise64(fd, offset, len, advise);
951}
952
953struct fadvise64_64_args {
954 int fd;
955 long long offset;
956 long long len;
957 int advice;
958};
959
960asmlinkage long
961sys32_fadvise64_64(struct fadvise64_64_args __user *args)
962{
963 struct fadvise64_64_args a;
964
965 if ( copy_from_user(&a, args, sizeof(a)) )
966 return -EFAULT;
967 if (a.advice == 4)
968 a.advice = POSIX_FADV_DONTNEED;
969 else if (a.advice == 5)
970 a.advice = POSIX_FADV_NOREUSE;
971 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
972}
Linux kernel - Deliverables
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