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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / x86 / ia32 / sys_ia32.c
blobabf71d26fc2ae29446605bcc59a01c6655db3d59
1 /*
2 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
3 * sys_sparc32
4 *
5 * Copyright (C) 2000 VA Linux Co
6 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
7 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
10 * Copyright (C) 2000 Hewlett-Packard Co.
11 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
12 * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
13 *
14 * These routines maintain argument size conversion between 32bit and 64bit
15 * environment. In 2.5 most of this should be moved to a generic directory.
16 *
17 * This file assumes that there is a hole at the end of user address space.
18 *
19 * Some of the functions are LE specific currently. These are
20 * hopefully all marked. This should be fixed.
21 */
22
23 #include <linux/kernel.h>
24 #include <linux/sched.h>
25 #include <linux/fs.h>
26 #include <linux/file.h>
27 #include <linux/signal.h>
28 #include <linux/syscalls.h>
29 #include <linux/resource.h>
30 #include <linux/times.h>
31 #include <linux/utsname.h>
32 #include <linux/smp.h>
33 #include <linux/smp_lock.h>
34 #include <linux/sem.h>
35 #include <linux/msg.h>
36 #include <linux/mm.h>
37 #include <linux/shm.h>
38 #include <linux/slab.h>
39 #include <linux/uio.h>
40 #include <linux/nfs_fs.h>
41 #include <linux/quota.h>
42 #include <linux/module.h>
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/cache.h>
46 #include <linux/nfsd/xdr.h>
47 #include <linux/nfsd/syscall.h>
48 #include <linux/poll.h>
49 #include <linux/personality.h>
50 #include <linux/stat.h>
51 #include <linux/ipc.h>
52 #include <linux/rwsem.h>
53 #include <linux/binfmts.h>
54 #include <linux/init.h>
55 #include <linux/aio_abi.h>
56 #include <linux/aio.h>
57 #include <linux/compat.h>
58 #include <linux/vfs.h>
59 #include <linux/ptrace.h>
60 #include <linux/highuid.h>
61 #include <linux/vmalloc.h>
62 #include <linux/fsnotify.h>
63 #include <linux/sysctl.h>
64 #include <asm/mman.h>
65 #include <asm/types.h>
66 #include <asm/uaccess.h>
67 #include <asm/semaphore.h>
68 #include <asm/atomic.h>
69 #include <asm/ldt.h>
70
71 #include <net/scm.h>
72 #include <net/sock.h>
73 #include <asm/ia32.h>
74
75 #define AA(__x) ((unsigned long)(__x))
76
77 int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
78 {
79 compat_ino_t ino;
80
81 typeof(ubuf->st_uid) uid = 0;
82 typeof(ubuf->st_gid) gid = 0;
83 SET_UID(uid, kbuf->uid);
84 SET_GID(gid, kbuf->gid);
85 if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
86 return -EOVERFLOW;
87 if (kbuf->size >= 0x7fffffff)
88 return -EOVERFLOW;
89 ino = kbuf->ino;
90 if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
91 return -EOVERFLOW;
92 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
93 __put_user(old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
94 __put_user(ino, &ubuf->st_ino) ||
95 __put_user(kbuf->mode, &ubuf->st_mode) ||
96 __put_user(kbuf->nlink, &ubuf->st_nlink) ||
97 __put_user(uid, &ubuf->st_uid) ||
98 __put_user(gid, &ubuf->st_gid) ||
99 __put_user(old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
100 __put_user(kbuf->size, &ubuf->st_size) ||
101 __put_user(kbuf->atime.tv_sec, &ubuf->st_atime) ||
102 __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
103 __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
104 __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
105 __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
106 __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
107 __put_user(kbuf->blksize, &ubuf->st_blksize) ||
108 __put_user(kbuf->blocks, &ubuf->st_blocks))
109 return -EFAULT;
110 return 0;
111 }
112
113 asmlinkage long sys32_truncate64(char __user *filename,
114 unsigned long offset_low,
115 unsigned long offset_high)
116 {
117 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
118 }
119
120 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
121 unsigned long offset_high)
122 {
123 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
124 }
125
126 /*
127 * Another set for IA32/LFS -- x86_64 struct stat is different due to
128 * support for 64bit inode numbers.
129 */
130 static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
131 {
132 typeof(ubuf->st_uid) uid = 0;
133 typeof(ubuf->st_gid) gid = 0;
134 SET_UID(uid, stat->uid);
135 SET_GID(gid, stat->gid);
136 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
137 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
138 __put_user(stat->ino, &ubuf->__st_ino) ||
139 __put_user(stat->ino, &ubuf->st_ino) ||
140 __put_user(stat->mode, &ubuf->st_mode) ||
141 __put_user(stat->nlink, &ubuf->st_nlink) ||
142 __put_user(uid, &ubuf->st_uid) ||
143 __put_user(gid, &ubuf->st_gid) ||
144 __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
145 __put_user(stat->size, &ubuf->st_size) ||
146 __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
147 __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
148 __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
149 __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
150 __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
151 __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
152 __put_user(stat->blksize, &ubuf->st_blksize) ||
153 __put_user(stat->blocks, &ubuf->st_blocks))
154 return -EFAULT;
155 return 0;
156 }
157
158 asmlinkage long sys32_stat64(char __user *filename,
159 struct stat64 __user *statbuf)
160 {
161 struct kstat stat;
162 int ret = vfs_stat(filename, &stat);
163
164 if (!ret)
165 ret = cp_stat64(statbuf, &stat);
166 return ret;
167 }
168
169 asmlinkage long sys32_lstat64(char __user *filename,
170 struct stat64 __user *statbuf)
171 {
172 struct kstat stat;
173 int ret = vfs_lstat(filename, &stat);
174 if (!ret)
175 ret = cp_stat64(statbuf, &stat);
176 return ret;
177 }
178
179 asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
180 {
181 struct kstat stat;
182 int ret = vfs_fstat(fd, &stat);
183 if (!ret)
184 ret = cp_stat64(statbuf, &stat);
185 return ret;
186 }
187
188 asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
189 struct stat64 __user *statbuf, int flag)
190 {
191 struct kstat stat;
192 int error = -EINVAL;
193
194 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
195 goto out;
196
197 if (flag & AT_SYMLINK_NOFOLLOW)
198 error = vfs_lstat_fd(dfd, filename, &stat);
199 else
200 error = vfs_stat_fd(dfd, filename, &stat);
201
202 if (!error)
203 error = cp_stat64(statbuf, &stat);
204
205 out:
206 return error;
207 }
208
209 /*
210 * Linux/i386 didn't use to be able to handle more than
211 * 4 system call parameters, so these system calls used a memory
212 * block for parameter passing..
213 */
214
215 struct mmap_arg_struct {
216 unsigned int addr;
217 unsigned int len;
218 unsigned int prot;
219 unsigned int flags;
220 unsigned int fd;
221 unsigned int offset;
222 };
223
224 asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
225 {
226 struct mmap_arg_struct a;
227 struct file *file = NULL;
228 unsigned long retval;
229 struct mm_struct *mm ;
230
231 if (copy_from_user(&a, arg, sizeof(a)))
232 return -EFAULT;
233
234 if (a.offset & ~PAGE_MASK)
235 return -EINVAL;
236
237 if (!(a.flags & MAP_ANONYMOUS)) {
238 file = fget(a.fd);
239 if (!file)
240 return -EBADF;
241 }
242
243 mm = current->mm;
244 down_write(&mm->mmap_sem);
245 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
246 a.offset>>PAGE_SHIFT);
247 if (file)
248 fput(file);
249
250 up_write(&mm->mmap_sem);
251
252 return retval;
253 }
254
255 asmlinkage long sys32_mprotect(unsigned long start, size_t len,
256 unsigned long prot)
257 {
258 return sys_mprotect(start, len, prot);
259 }
260
261 asmlinkage long sys32_pipe(int __user *fd)
262 {
263 int retval;
264 int fds[2];
265
266 retval = do_pipe(fds);
267 if (retval)
268 goto out;
269 if (copy_to_user(fd, fds, sizeof(fds)))
270 retval = -EFAULT;
271 out:
272 return retval;
273 }
274
275 asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
276 struct sigaction32 __user *oact,
277 unsigned int sigsetsize)
278 {
279 struct k_sigaction new_ka, old_ka;
280 int ret;
281 compat_sigset_t set32;
282
283 /* XXX: Don't preclude handling different sized sigset_t's. */
284 if (sigsetsize != sizeof(compat_sigset_t))
285 return -EINVAL;
286
287 if (act) {
288 compat_uptr_t handler, restorer;
289
290 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
291 __get_user(handler, &act->sa_handler) ||
292 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
293 __get_user(restorer, &act->sa_restorer) ||
294 __copy_from_user(&set32, &act->sa_mask,
295 sizeof(compat_sigset_t)))
296 return -EFAULT;
297 new_ka.sa.sa_handler = compat_ptr(handler);
298 new_ka.sa.sa_restorer = compat_ptr(restorer);
299
300 /*
301 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
302 * than _NSIG_WORDS << 1
303 */
304 switch (_NSIG_WORDS) {
305 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
306 | (((long)set32.sig[7]) << 32);
307 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
308 | (((long)set32.sig[5]) << 32);
309 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
310 | (((long)set32.sig[3]) << 32);
311 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
312 | (((long)set32.sig[1]) << 32);
313 }
314 }
315
316 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
317
318 if (!ret && oact) {
319 /*
320 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
321 * than _NSIG_WORDS << 1
322 */
323 switch (_NSIG_WORDS) {
324 case 4:
325 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
326 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
327 case 3:
328 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
329 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
330 case 2:
331 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
332 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
333 case 1:
334 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
335 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
336 }
337 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
338 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
339 &oact->sa_handler) ||
340 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
341 &oact->sa_restorer) ||
342 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
343 __copy_to_user(&oact->sa_mask, &set32,
344 sizeof(compat_sigset_t)))
345 return -EFAULT;
346 }
347
348 return ret;
349 }
350
351 asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
352 struct old_sigaction32 __user *oact)
353 {
354 struct k_sigaction new_ka, old_ka;
355 int ret;
356
357 if (act) {
358 compat_old_sigset_t mask;
359 compat_uptr_t handler, restorer;
360
361 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
362 __get_user(handler, &act->sa_handler) ||
363 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
364 __get_user(restorer, &act->sa_restorer) ||
365 __get_user(mask, &act->sa_mask))
366 return -EFAULT;
367
368 new_ka.sa.sa_handler = compat_ptr(handler);
369 new_ka.sa.sa_restorer = compat_ptr(restorer);
370
371 siginitset(&new_ka.sa.sa_mask, mask);
372 }
373
374 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
375
376 if (!ret && oact) {
377 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
378 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
379 &oact->sa_handler) ||
380 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
381 &oact->sa_restorer) ||
382 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
383 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
384 return -EFAULT;
385 }
386
387 return ret;
388 }
389
390 asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
391 compat_sigset_t __user *oset,
392 unsigned int sigsetsize)
393 {
394 sigset_t s;
395 compat_sigset_t s32;
396 int ret;
397 mm_segment_t old_fs = get_fs();
398
399 if (set) {
400 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
401 return -EFAULT;
402 switch (_NSIG_WORDS) {
403 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
404 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
405 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
406 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
407 }
408 }
409 set_fs(KERNEL_DS);
410 ret = sys_rt_sigprocmask(how,
411 set ? (sigset_t __user *)&s : NULL,
412 oset ? (sigset_t __user *)&s : NULL,
413 sigsetsize);
414 set_fs(old_fs);
415 if (ret)
416 return ret;
417 if (oset) {
418 switch (_NSIG_WORDS) {
419 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
420 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
421 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
422 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
423 }
424 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
425 return -EFAULT;
426 }
427 return 0;
428 }
429
430 static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
431 {
432 int err = -EFAULT;
433
434 if (access_ok(VERIFY_READ, i, sizeof(*i))) {
435 err = __get_user(o->tv_sec, &i->tv_sec);
436 err |= __get_user(o->tv_usec, &i->tv_usec);
437 }
438 return err;
439 }
440
441 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
442 {
443 int err = -EFAULT;
444
445 if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
446 err = __put_user(i->tv_sec, &o->tv_sec);
447 err |= __put_user(i->tv_usec, &o->tv_usec);
448 }
449 return err;
450 }
451
452 asmlinkage long sys32_alarm(unsigned int seconds)
453 {
454 return alarm_setitimer(seconds);
455 }
456
457 /*
458 * Translations due to time_t size differences. Which affects all
459 * sorts of things, like timeval and itimerval.
460 */
461 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
462 struct timezone __user *tz)
463 {
464 if (tv) {
465 struct timeval ktv;
466
467 do_gettimeofday(&ktv);
468 if (put_tv32(tv, &ktv))
469 return -EFAULT;
470 }
471 if (tz) {
472 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
473 return -EFAULT;
474 }
475 return 0;
476 }
477
478 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
479 struct timezone __user *tz)
480 {
481 struct timeval ktv;
482 struct timespec kts;
483 struct timezone ktz;
484
485 if (tv) {
486 if (get_tv32(&ktv, tv))
487 return -EFAULT;
488 kts.tv_sec = ktv.tv_sec;
489 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
490 }
491 if (tz) {
492 if (copy_from_user(&ktz, tz, sizeof(ktz)))
493 return -EFAULT;
494 }
495
496 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
497 }
498
499 struct sel_arg_struct {
500 unsigned int n;
501 unsigned int inp;
502 unsigned int outp;
503 unsigned int exp;
504 unsigned int tvp;
505 };
506
507 asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
508 {
509 struct sel_arg_struct a;
510
511 if (copy_from_user(&a, arg, sizeof(a)))
512 return -EFAULT;
513 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
514 compat_ptr(a.exp), compat_ptr(a.tvp));
515 }
516
517 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
518 int options)
519 {
520 return compat_sys_wait4(pid, stat_addr, options, NULL);
521 }
522
523 /* 32-bit timeval and related flotsam. */
524
525 asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
526 {
527 return sys_sysfs(option, arg1, arg2);
528 }
529
530 asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
531 struct compat_timespec __user *interval)
532 {
533 struct timespec t;
534 int ret;
535 mm_segment_t old_fs = get_fs();
536
537 set_fs(KERNEL_DS);
538 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
539 set_fs(old_fs);
540 if (put_compat_timespec(&t, interval))
541 return -EFAULT;
542 return ret;
543 }
544
545 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
546 compat_size_t sigsetsize)
547 {
548 sigset_t s;
549 compat_sigset_t s32;
550 int ret;
551 mm_segment_t old_fs = get_fs();
552
553 set_fs(KERNEL_DS);
554 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
555 set_fs(old_fs);
556 if (!ret) {
557 switch (_NSIG_WORDS) {
558 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
559 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
560 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
561 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
562 }
563 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
564 return -EFAULT;
565 }
566 return ret;
567 }
568
569 asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
570 compat_siginfo_t __user *uinfo)
571 {
572 siginfo_t info;
573 int ret;
574 mm_segment_t old_fs = get_fs();
575
576 if (copy_siginfo_from_user32(&info, uinfo))
577 return -EFAULT;
578 set_fs(KERNEL_DS);
579 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
580 set_fs(old_fs);
581 return ret;
582 }
583
584 /* These are here just in case some old ia32 binary calls it. */
585 asmlinkage long sys32_pause(void)
586 {
587 current->state = TASK_INTERRUPTIBLE;
588 schedule();
589 return -ERESTARTNOHAND;
590 }
591
592
593 #ifdef CONFIG_SYSCTL_SYSCALL
594 struct sysctl_ia32 {
595 unsigned int name;
596 int nlen;
597 unsigned int oldval;
598 unsigned int oldlenp;
599 unsigned int newval;
600 unsigned int newlen;
601 unsigned int __unused[4];
602 };
603
604
605 asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
606 {
607 struct sysctl_ia32 a32;
608 mm_segment_t old_fs = get_fs();
609 void __user *oldvalp, *newvalp;
610 size_t oldlen;
611 int __user *namep;
612 long ret;
613
614 if (copy_from_user(&a32, args32, sizeof(a32)))
615 return -EFAULT;
616
617 /*
618 * We need to pre-validate these because we have to disable
619 * address checking before calling do_sysctl() because of
620 * OLDLEN but we can't run the risk of the user specifying bad
621 * addresses here. Well, since we're dealing with 32 bit
622 * addresses, we KNOW that access_ok() will always succeed, so
623 * this is an expensive NOP, but so what...
624 */
625 namep = compat_ptr(a32.name);
626 oldvalp = compat_ptr(a32.oldval);
627 newvalp = compat_ptr(a32.newval);
628
629 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
630 || !access_ok(VERIFY_WRITE, namep, 0)
631 || !access_ok(VERIFY_WRITE, oldvalp, 0)
632 || !access_ok(VERIFY_WRITE, newvalp, 0))
633 return -EFAULT;
634
635 set_fs(KERNEL_DS);
636 lock_kernel();
637 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
638 newvalp, (size_t) a32.newlen);
639 unlock_kernel();
640 set_fs(old_fs);
641
642 if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
643 return -EFAULT;
644
645 return ret;
646 }
647 #endif
648
649 /* warning: next two assume little endian */
650 asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
651 u32 poslo, u32 poshi)
652 {
653 return sys_pread64(fd, ubuf, count,
654 ((loff_t)AA(poshi) << 32) | AA(poslo));
655 }
656
657 asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
658 u32 poslo, u32 poshi)
659 {
660 return sys_pwrite64(fd, ubuf, count,
661 ((loff_t)AA(poshi) << 32) | AA(poslo));
662 }
663
664
665 asmlinkage long sys32_personality(unsigned long personality)
666 {
667 int ret;
668
669 if (personality(current->personality) == PER_LINUX32 &&
670 personality == PER_LINUX)
671 personality = PER_LINUX32;
672 ret = sys_personality(personality);
673 if (ret == PER_LINUX32)
674 ret = PER_LINUX;
675 return ret;
676 }
677
678 asmlinkage long sys32_sendfile(int out_fd, int in_fd,
679 compat_off_t __user *offset, s32 count)
680 {
681 mm_segment_t old_fs = get_fs();
682 int ret;
683 off_t of;
684
685 if (offset && get_user(of, offset))
686 return -EFAULT;
687
688 set_fs(KERNEL_DS);
689 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
690 count);
691 set_fs(old_fs);
692
693 if (offset && put_user(of, offset))
694 return -EFAULT;
695 return ret;
696 }
697
698 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
699 unsigned long prot, unsigned long flags,
700 unsigned long fd, unsigned long pgoff)
701 {
702 struct mm_struct *mm = current->mm;
703 unsigned long error;
704 struct file *file = NULL;
705
706 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
707 if (!(flags & MAP_ANONYMOUS)) {
708 file = fget(fd);
709 if (!file)
710 return -EBADF;
711 }
712
713 down_write(&mm->mmap_sem);
714 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
715 up_write(&mm->mmap_sem);
716
717 if (file)
718 fput(file);
719 return error;
720 }
721
722 asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
723 {
724 char *arch = "x86_64";
725 int err;
726
727 if (!name)
728 return -EFAULT;
729 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
730 return -EFAULT;
731
732 down_read(&uts_sem);
733
734 err = __copy_to_user(&name->sysname, &utsname()->sysname,
735 __OLD_UTS_LEN);
736 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
737 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
738 __OLD_UTS_LEN);
739 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
740 err |= __copy_to_user(&name->release, &utsname()->release,
741 __OLD_UTS_LEN);
742 err |= __put_user(0, name->release+__OLD_UTS_LEN);
743 err |= __copy_to_user(&name->version, &utsname()->version,
744 __OLD_UTS_LEN);
745 err |= __put_user(0, name->version+__OLD_UTS_LEN);
746
747 if (personality(current->personality) == PER_LINUX32)
748 arch = "i686";
749
750 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
751
752 up_read(&uts_sem);
753
754 err = err ? -EFAULT : 0;
755
756 return err;
757 }
758
759 long sys32_uname(struct old_utsname __user *name)
760 {
761 int err;
762
763 if (!name)
764 return -EFAULT;
765 down_read(&uts_sem);
766 err = copy_to_user(name, utsname(), sizeof(*name));
767 up_read(&uts_sem);
768 if (personality(current->personality) == PER_LINUX32)
769 err |= copy_to_user(&name->machine, "i686", 5);
770
771 return err ? -EFAULT : 0;
772 }
773
774 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
775 {
776 struct ustat u;
777 mm_segment_t seg;
778 int ret;
779
780 seg = get_fs();
781 set_fs(KERNEL_DS);
782 ret = sys_ustat(dev, (struct ustat __user *)&u);
783 set_fs(seg);
784 if (ret < 0)
785 return ret;
786
787 if (!access_ok(VERIFY_WRITE, u32p, sizeof(struct ustat32)) ||
788 __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
789 __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
790 __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
791 __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
792 ret = -EFAULT;
793 return ret;
794 }
795
796 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
797 compat_uptr_t __user *envp, struct pt_regs *regs)
798 {
799 long error;
800 char *filename;
801
802 filename = getname(name);
803 error = PTR_ERR(filename);
804 if (IS_ERR(filename))
805 return error;
806 error = compat_do_execve(filename, argv, envp, regs);
807 if (error == 0) {
808 task_lock(current);
809 current->ptrace &= ~PT_DTRACE;
810 task_unlock(current);
811 }
812 putname(filename);
813 return error;
814 }
815
816 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
817 struct pt_regs *regs)
818 {
819 void __user *parent_tid = (void __user *)regs->dx;
820 void __user *child_tid = (void __user *)regs->di;
821
822 if (!newsp)
823 newsp = regs->sp;
824 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
825 }
826
827 /*
828 * Some system calls that need sign extended arguments. This could be
829 * done by a generic wrapper.
830 */
831 long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
832 {
833 return sys_lseek(fd, offset, whence);
834 }
835
836 long sys32_kill(int pid, int sig)
837 {
838 return sys_kill(pid, sig);
839 }
840
841 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
842 __u32 len_low, __u32 len_high, int advice)
843 {
844 return sys_fadvise64_64(fd,
845 (((u64)offset_high)<<32) | offset_low,
846 (((u64)len_high)<<32) | len_low,
847 advice);
848 }
849
850 long sys32_vm86_warning(void)
851 {
852 struct task_struct *me = current;
853 static char lastcomm[sizeof(me->comm)];
854
855 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
856 compat_printk(KERN_INFO
857 "%s: vm86 mode not supported on 64 bit kernel\n",
858 me->comm);
859 strncpy(lastcomm, me->comm, sizeof(lastcomm));
860 }
861 return -ENOSYS;
862 }
863
864 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
865 char __user *buf, size_t len)
866 {
867 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
868 }
869
870 asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
871 size_t count)
872 {
873 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
874 }
875
876 asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
877 unsigned n_low, unsigned n_hi, int flags)
878 {
879 return sys_sync_file_range(fd,
880 ((u64)off_hi << 32) | off_low,
881 ((u64)n_hi << 32) | n_low, flags);
882 }
883
884 asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
885 size_t len, int advice)
886 {
887 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
888 len, advice);
889 }
890
891 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
892 unsigned offset_hi, unsigned len_lo,
893 unsigned len_hi)
894 {
895 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
896 ((u64)len_hi << 32) | len_lo);
897 }
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