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[S390] Move init_irq_proc to the other irq related functions.
[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
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 */
1df23957 298#ifdef CONFIG_SYSVIPC
1da177e4
LT		 299asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
300{
301 if (call >> 16) /* hack for backward compatibility */
302 return -EINVAL;
303
304 call &= 0xffff;
305
306 switch (call) {
307 case SEMTIMEDOP:
308 return compat_sys_semtimedop(first, compat_ptr(ptr),
309 second, compat_ptr(third));
310 case SEMOP:
311 /* struct sembuf is the same on 32 and 64bit :)) */
312 return sys_semtimedop(first, compat_ptr(ptr),
313 second, NULL);
314 case SEMGET:
315 return sys_semget(first, second, third);
316 case SEMCTL:
317 return compat_sys_semctl(first, second, third,
318 compat_ptr(ptr));
319 case MSGSND:
320 return compat_sys_msgsnd(first, second, third,
321 compat_ptr(ptr));
322 case MSGRCV:
323 return compat_sys_msgrcv(first, second, 0, third,
324 0, compat_ptr(ptr));
325 case MSGGET:
326 return sys_msgget((key_t) first, second);
327 case MSGCTL:
328 return compat_sys_msgctl(first, second, compat_ptr(ptr));
329 case SHMAT:
330 return compat_sys_shmat(first, second, third,
331 0, compat_ptr(ptr));
332 case SHMDT:
333 return sys_shmdt(compat_ptr(ptr));
334 case SHMGET:
335 return sys_shmget(first, (unsigned)second, third);
336 case SHMCTL:
337 return compat_sys_shmctl(first, second, compat_ptr(ptr));
338 }
339
340 return -ENOSYS;
341}
1df23957 342#endif
1da177e4 343
24954a14 344asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
1da177e4
LT		 345{
346 if ((int)high < 0)
347 return -EINVAL;
348 else
349 return sys_truncate(path, (high << 32) | low);
350}
351
352asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
353{
354 if ((int)high < 0)
355 return -EINVAL;
356 else
357 return sys_ftruncate(fd, (high << 32) | low);
358}
359
24954a14 360int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
1da177e4 361{
afefdbb2 362 compat_ino_t ino;
1da177e4
LT		 363 int err;
364
365 if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
366 return -EOVERFLOW;
367
afefdbb2
DH		 368 ino = stat->ino;
369 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
370 return -EOVERFLOW;
371
1da177e4
LT		 372 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
373 err |= put_user(stat->ino, &statbuf->st_ino);
374 err |= put_user(stat->mode, &statbuf->st_mode);
375 err |= put_user(stat->nlink, &statbuf->st_nlink);
376 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
377 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
378 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
379 err |= put_user(stat->size, &statbuf->st_size);
380 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
381 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
382 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
383 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
384 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
385 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
386 err |= put_user(stat->blksize, &statbuf->st_blksize);
387 err |= put_user(stat->blocks, &statbuf->st_blocks);
388/* fixme
389 err |= put_user(0, &statbuf->__unused4[0]);
390 err |= put_user(0, &statbuf->__unused4[1]);
391*/
392 return err;
393}
394
395struct sysinfo32 {
396 s32 uptime;
397 u32 loads[3];
398 u32 totalram;
399 u32 freeram;
400 u32 sharedram;
401 u32 bufferram;
402 u32 totalswap;
403 u32 freeswap;
404 unsigned short procs;
405 unsigned short pads;
406 u32 totalhigh;
407 u32 freehigh;
408 unsigned int mem_unit;
409 char _f[8];
410};
411
412asmlinkage long sys32_sysinfo(struct sysinfo32 __user *info)
413{
414 struct sysinfo s;
415 int ret, err;
416 mm_segment_t old_fs = get_fs ();
417
418 set_fs (KERNEL_DS);
d2c993d8 419 ret = sys_sysinfo((struct sysinfo __user *) &s);
1da177e4
LT		 420 set_fs (old_fs);
421 err = put_user (s.uptime, &info->uptime);
422 err |= __put_user (s.loads[0], &info->loads[0]);
423 err |= __put_user (s.loads[1], &info->loads[1]);
424 err |= __put_user (s.loads[2], &info->loads[2]);
425 err |= __put_user (s.totalram, &info->totalram);
426 err |= __put_user (s.freeram, &info->freeram);
427 err |= __put_user (s.sharedram, &info->sharedram);
428 err |= __put_user (s.bufferram, &info->bufferram);
429 err |= __put_user (s.totalswap, &info->totalswap);
430 err |= __put_user (s.freeswap, &info->freeswap);
431 err |= __put_user (s.procs, &info->procs);
432 err |= __put_user (s.totalhigh, &info->totalhigh);
433 err |= __put_user (s.freehigh, &info->freehigh);
434 err |= __put_user (s.mem_unit, &info->mem_unit);
435 if (err)
436 return -EFAULT;
437 return ret;
438}
439
440asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
441 struct compat_timespec __user *interval)
442{
443 struct timespec t;
444 int ret;
445 mm_segment_t old_fs = get_fs ();
446
447 set_fs (KERNEL_DS);
d2c993d8 448 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
1da177e4
LT		 449 set_fs (old_fs);
450 if (put_compat_timespec(&t, interval))
451 return -EFAULT;
452 return ret;
453}
454
455asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
456 compat_sigset_t __user *oset, 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 if (set) {
464 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
465 return -EFAULT;
466 switch (_NSIG_WORDS) {
467 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
468 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
469 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
470 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
471 }
472 }
473 set_fs (KERNEL_DS);
d2c993d8
HC		 474 ret = sys_rt_sigprocmask(how,
475 set ? (sigset_t __user *) &s : NULL,
476 oset ? (sigset_t __user *) &s : NULL,
477 sigsetsize);
1da177e4
LT		 478 set_fs (old_fs);
479 if (ret) return ret;
480 if (oset) {
481 switch (_NSIG_WORDS) {
482 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
483 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
484 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
485 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
486 }
487 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
488 return -EFAULT;
489 }
490 return 0;
491}
492
493asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
494 size_t sigsetsize)
495{
496 sigset_t s;
497 compat_sigset_t s32;
498 int ret;
499 mm_segment_t old_fs = get_fs();
500
501 set_fs (KERNEL_DS);
d2c993d8 502 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
1da177e4
LT		 503 set_fs (old_fs);
504 if (!ret) {
505 switch (_NSIG_WORDS) {
506 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
507 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
508 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
509 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
510 }
511 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
512 return -EFAULT;
513 }
514 return ret;
515}
516
517asmlinkage long
518sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
519{
520 siginfo_t info;
521 int ret;
522 mm_segment_t old_fs = get_fs();
523
524 if (copy_siginfo_from_user32(&info, uinfo))
525 return -EFAULT;
526 set_fs (KERNEL_DS);
d2c993d8 527 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
1da177e4
LT		 528 set_fs (old_fs);
529 return ret;
530}
531
532/*
533 * sys32_execve() executes a new program after the asm stub has set
534 * things up for us. This should basically do what I want it to.
535 */
536asmlinkage long
537sys32_execve(struct pt_regs regs)
538{
539 int error;
540 char * filename;
541
542 filename = getname(compat_ptr(regs.orig_gpr2));
543 error = PTR_ERR(filename);
544 if (IS_ERR(filename))
545 goto out;
546 error = compat_do_execve(filename, compat_ptr(regs.gprs[3]),
547 compat_ptr(regs.gprs[4]), &regs);
548 if (error == 0)
549 {
550 task_lock(current);
551 current->ptrace &= ~PT_DTRACE;
552 task_unlock(current);
553 current->thread.fp_regs.fpc=0;
94c12cc7 554 asm volatile("sfpc %0,0" : : "d" (0));
1da177e4
LT		 555 }
556 putname(filename);
557out:
558 return error;
559}
560
561
562#ifdef CONFIG_MODULES
563
564asmlinkage long
565sys32_init_module(void __user *umod, unsigned long len,
566 const char __user *uargs)
567{
568 return sys_init_module(umod, len, uargs);
569}
570
571asmlinkage long
572sys32_delete_module(const char __user *name_user, unsigned int flags)
573{
574 return sys_delete_module(name_user, flags);
575}
576
577#else /* CONFIG_MODULES */
578
579asmlinkage long
580sys32_init_module(void __user *umod, unsigned long len,
581 const char __user *uargs)
582{
583 return -ENOSYS;
584}
585
586asmlinkage long
587sys32_delete_module(const char __user *name_user, unsigned int flags)
588{
589 return -ENOSYS;
590}
591
592#endif /* CONFIG_MODULES */
593
594/* Translations due to time_t size differences. Which affects all
595 sorts of things, like timeval and itimerval. */
596
597extern struct timezone sys_tz;
598
24954a14 599asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 600{
601 if (tv) {
602 struct timeval ktv;
603 do_gettimeofday(&ktv);
604 if (put_tv32(tv, &ktv))
605 return -EFAULT;
606 }
607 if (tz) {
608 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
609 return -EFAULT;
610 }
611 return 0;
612}
613
24954a14 614static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
1da177e4
LT		 615{
616 long usec;
617
618 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
619 return -EFAULT;
620 if (__get_user(o->tv_sec, &i->tv_sec))
621 return -EFAULT;
622 if (__get_user(usec, &i->tv_usec))
623 return -EFAULT;
624 o->tv_nsec = usec * 1000;
625 return 0;
626}
627
24954a14 628asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
1da177e4
LT		 629{
630 struct timespec kts;
631 struct timezone ktz;
632
633 if (tv) {
634 if (get_ts32(&kts, tv))
635 return -EFAULT;
636 }
637 if (tz) {
638 if (copy_from_user(&ktz, tz, sizeof(ktz)))
639 return -EFAULT;
640 }
641
642 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
643}
644
645/* These are here just in case some old sparc32 binary calls it. */
646asmlinkage long sys32_pause(void)
647{
648 current->state = TASK_INTERRUPTIBLE;
649 schedule();
650 return -ERESTARTNOHAND;
651}
652
24954a14 653asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
1da177e4
LT		 654 size_t count, u32 poshi, u32 poslo)
655{
656 if ((compat_ssize_t) count < 0)
657 return -EINVAL;
658 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
659}
660
24954a14 661asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
1da177e4
LT		 662 size_t count, u32 poshi, u32 poslo)
663{
664 if ((compat_ssize_t) count < 0)
665 return -EINVAL;
666 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
667}
668
669asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
670{
671 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
672}
673
24954a14 674asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
1da177e4
LT		 675{
676 mm_segment_t old_fs = get_fs();
677 int ret;
678 off_t of;
679
680 if (offset && get_user(of, offset))
681 return -EFAULT;
682
683 set_fs(KERNEL_DS);
d2c993d8
HC		 684 ret = sys_sendfile(out_fd, in_fd,
685 offset ? (off_t __user *) &of : NULL, count);
1da177e4
LT		 686 set_fs(old_fs);
687
83b942bd 688 if (offset && put_user(of, offset))
1da177e4
LT		 689 return -EFAULT;
690
691 return ret;
692}
693
694asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
24954a14 695 compat_loff_t __user *offset, s32 count)
1da177e4
LT		 696{
697 mm_segment_t old_fs = get_fs();
698 int ret;
699 loff_t lof;
700
701 if (offset && get_user(lof, offset))
702 return -EFAULT;
703
704 set_fs(KERNEL_DS);
d2c993d8
HC		 705 ret = sys_sendfile64(out_fd, in_fd,
706 offset ? (loff_t __user *) &lof : NULL, count);
1da177e4
LT		 707 set_fs(old_fs);
708
709 if (offset && put_user(lof, offset))
710 return -EFAULT;
711
712 return ret;
713}
714
b89a8171 715#ifdef CONFIG_SYSCTL_SYSCALL
1da177e4
LT		 716struct __sysctl_args32 {
717 u32 name;
718 int nlen;
719 u32 oldval;
720 u32 oldlenp;
721 u32 newval;
722 u32 newlen;
723 u32 __unused[4];
724};
725
24954a14 726asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
1da177e4
LT		 727{
728 struct __sysctl_args32 tmp;
729 int error;
24954a14
AV		 730 size_t oldlen;
731 size_t __user *oldlenp = NULL;
732 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1da177e4
LT		 733
734 if (copy_from_user(&tmp, args, sizeof(tmp)))
735 return -EFAULT;
736
737 if (tmp.oldval && tmp.oldlenp) {
738 /* Duh, this is ugly and might not work if sysctl_args
739 is in read-only memory, but do_sysctl does indirectly
740 a lot of uaccess in both directions and we'd have to
741 basically copy the whole sysctl.c here, and
742 glibc's __sysctl uses rw memory for the structure
743 anyway. */
24954a14
AV		 744 if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) ||
745 put_user(oldlen, (size_t __user *)addr))
1da177e4 746 return -EFAULT;
24954a14 747 oldlenp = (size_t __user *)addr;
1da177e4
LT		 748 }
749
750 lock_kernel();
24954a14
AV		 751 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
752 oldlenp, compat_ptr(tmp.newval), tmp.newlen);
1da177e4
LT		 753 unlock_kernel();
754 if (oldlenp) {
755 if (!error) {
24954a14
AV		 756 if (get_user(oldlen, (size_t __user *)addr) ||
757 put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
1da177e4
LT		 758 error = -EFAULT;
759 }
12bae235
HC		 760 if (copy_to_user(args->__unused, tmp.__unused,
761 sizeof(tmp.__unused)))
762 error = -EFAULT;
1da177e4
LT		 763 }
764 return error;
765}
766#endif
767
768struct stat64_emu31 {
769 unsigned long long st_dev;
770 unsigned int __pad1;
771#define STAT64_HAS_BROKEN_ST_INO 1
772 u32 __st_ino;
773 unsigned int st_mode;
774 unsigned int st_nlink;
775 u32 st_uid;
776 u32 st_gid;
777 unsigned long long st_rdev;
778 unsigned int __pad3;
779 long st_size;
780 u32 st_blksize;
781 unsigned char __pad4[4];
782 u32 __pad5; /* future possible st_blocks high bits */
783 u32 st_blocks; /* Number 512-byte blocks allocated. */
784 u32 st_atime;
785 u32 __pad6;
786 u32 st_mtime;
787 u32 __pad7;
788 u32 st_ctime;
789 u32 __pad8; /* will be high 32 bits of ctime someday */
790 unsigned long st_ino;
791};
792
24954a14 793static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
1da177e4
LT		 794{
795 struct stat64_emu31 tmp;
796
797 memset(&tmp, 0, sizeof(tmp));
798
799 tmp.st_dev = huge_encode_dev(stat->dev);
800 tmp.st_ino = stat->ino;
801 tmp.__st_ino = (u32)stat->ino;
802 tmp.st_mode = stat->mode;
803 tmp.st_nlink = (unsigned int)stat->nlink;
804 tmp.st_uid = stat->uid;
805 tmp.st_gid = stat->gid;
806 tmp.st_rdev = huge_encode_dev(stat->rdev);
807 tmp.st_size = stat->size;
808 tmp.st_blksize = (u32)stat->blksize;
809 tmp.st_blocks = (u32)stat->blocks;
810 tmp.st_atime = (u32)stat->atime.tv_sec;
811 tmp.st_mtime = (u32)stat->mtime.tv_sec;
812 tmp.st_ctime = (u32)stat->ctime.tv_sec;
813
814 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
815}
816
24954a14 817asmlinkage long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 818{
819 struct kstat stat;
820 int ret = vfs_stat(filename, &stat);
821 if (!ret)
822 ret = cp_stat64(statbuf, &stat);
823 return ret;
824}
825
24954a14 826asmlinkage long sys32_lstat64(char __user * filename, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 827{
828 struct kstat stat;
829 int ret = vfs_lstat(filename, &stat);
830 if (!ret)
831 ret = cp_stat64(statbuf, &stat);
832 return ret;
833}
834
24954a14 835asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
1da177e4
LT		 836{
837 struct kstat stat;
838 int ret = vfs_fstat(fd, &stat);
839 if (!ret)
840 ret = cp_stat64(statbuf, &stat);
841 return ret;
842}
843
ed3d021b
HC		 844asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
845 struct stat64_emu31 __user* statbuf, int flag)
19bf9cbf
HC		 846{
847 struct kstat stat;
848 int error = -EINVAL;
849
850 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
851 goto out;
852
853 if (flag & AT_SYMLINK_NOFOLLOW)
854 error = vfs_lstat_fd(dfd, filename, &stat);
855 else
856 error = vfs_stat_fd(dfd, filename, &stat);
857
858 if (!error)
859 error = cp_stat64(statbuf, &stat);
860out:
861 return error;
862}
863
1da177e4
LT		 864/*
865 * Linux/i386 didn't use to be able to handle more than
866 * 4 system call parameters, so these system calls used a memory
867 * block for parameter passing..
868 */
869
870struct mmap_arg_struct_emu31 {
871 u32 addr;
872 u32 len;
873 u32 prot;
874 u32 flags;
875 u32 fd;
876 u32 offset;
877};
878
879/* common code for old and new mmaps */
880static inline long do_mmap2(
881 unsigned long addr, unsigned long len,
882 unsigned long prot, unsigned long flags,
883 unsigned long fd, unsigned long pgoff)
884{
885 struct file * file = NULL;
886 unsigned long error = -EBADF;
887
888 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
889 if (!(flags & MAP_ANONYMOUS)) {
890 file = fget(fd);
891 if (!file)
892 goto out;
893 }
894
895 down_write(&current->mm->mmap_sem);
896 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
897 if (!IS_ERR((void *) error) && error + len >= 0x80000000ULL) {
898 /* Result is out of bounds. */
899 do_munmap(current->mm, addr, len);
900 error = -ENOMEM;
901 }
902 up_write(&current->mm->mmap_sem);
903
904 if (file)
905 fput(file);
906out:
907 return error;
908}
909
910
911asmlinkage unsigned long
24954a14 912old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 913{
914 struct mmap_arg_struct_emu31 a;
915 int error = -EFAULT;
916
917 if (copy_from_user(&a, arg, sizeof(a)))
918 goto out;
919
920 error = -EINVAL;
921 if (a.offset & ~PAGE_MASK)
922 goto out;
923
924 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
925out:
926 return error;
927}
928
929asmlinkage long
24954a14 930sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
1da177e4
LT		 931{
932 struct mmap_arg_struct_emu31 a;
933 int error = -EFAULT;
934
935 if (copy_from_user(&a, arg, sizeof(a)))
936 goto out;
937 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
938out:
939 return error;
940}
941
24954a14 942asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 943{
944 if ((compat_ssize_t) count < 0)
945 return -EINVAL;
946
947 return sys_read(fd, buf, count);
948}
949
24954a14 950asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count)
1da177e4
LT		 951{
952 if ((compat_ssize_t) count < 0)
953 return -EINVAL;
954
955 return sys_write(fd, buf, count);
956}
957
958asmlinkage long sys32_clone(struct pt_regs regs)
959{
960 unsigned long clone_flags;
961 unsigned long newsp;
24954a14 962 int __user *parent_tidptr, *child_tidptr;
1da177e4
LT		 963
964 clone_flags = regs.gprs[3] & 0xffffffffUL;
965 newsp = regs.orig_gpr2 & 0x7fffffffUL;
24954a14
AV		 966 parent_tidptr = compat_ptr(regs.gprs[4]);
967 child_tidptr = compat_ptr(regs.gprs[5]);
1da177e4
LT		 968 if (!newsp)
969 newsp = regs.gprs[15];
970 return do_fork(clone_flags, newsp, &regs, 0,
971 parent_tidptr, child_tidptr);
972}
973
068e1b94
MS		 974/*
975 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
976 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
977 * because the 31 bit values differ from the 64 bit values.
978 */
979
980asmlinkage long
981sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
982{
983 if (advise == 4)
984 advise = POSIX_FADV_DONTNEED;
985 else if (advise == 5)
986 advise = POSIX_FADV_NOREUSE;
987 return sys_fadvise64(fd, offset, len, advise);
988}
989
990struct fadvise64_64_args {
991 int fd;
992 long long offset;
993 long long len;
994 int advice;
995};
996
997asmlinkage long
998sys32_fadvise64_64(struct fadvise64_64_args __user *args)
999{
1000 struct fadvise64_64_args a;
1001
1002 if ( copy_from_user(&a, args, sizeof(a)) )
1003 return -EFAULT;
1004 if (a.advice == 4)
1005 a.advice = POSIX_FADV_DONTNEED;
1006 else if (a.advice == 5)
1007 a.advice = POSIX_FADV_NOREUSE;
1008 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
1009}
Linux kernel - Deliverables
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