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[SERIAL] Make uart_line_info() correctly tell MMIO from I/O port
[linux-2.6/openmoko-kernel/knife-kernel.git] / arch / x86_64 / ia32 / sys_ia32.c
blobf280d3665f4bed8fa07513078f39113369814354
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 hopefully all marked.
20 * 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 typeof(ubuf->st_uid) uid = 0;
80 typeof(ubuf->st_gid) gid = 0;
81 SET_UID(uid, kbuf->uid);
82 SET_GID(gid, kbuf->gid);
83 if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
84 return -EOVERFLOW;
85 if (kbuf->size >= 0x7fffffff)
86 return -EOVERFLOW;
87 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
88 __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
89 __put_user (kbuf->ino, &ubuf->st_ino) ||
90 __put_user (kbuf->mode, &ubuf->st_mode) ||
91 __put_user (kbuf->nlink, &ubuf->st_nlink) ||
92 __put_user (uid, &ubuf->st_uid) ||
93 __put_user (gid, &ubuf->st_gid) ||
94 __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
95 __put_user (kbuf->size, &ubuf->st_size) ||
96 __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
97 __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
98 __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
99 __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
100 __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
101 __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
102 __put_user (kbuf->blksize, &ubuf->st_blksize) ||
103 __put_user (kbuf->blocks, &ubuf->st_blocks))
104 return -EFAULT;
105 return 0;
106 }
107
108 asmlinkage long
109 sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high)
110 {
111 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
112 }
113
114 asmlinkage long
115 sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
116 {
117 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
118 }
119
120 /* Another set for IA32/LFS -- x86_64 struct stat is different due to
121 support for 64bit inode numbers. */
122
123 static int
124 cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
125 {
126 typeof(ubuf->st_uid) uid = 0;
127 typeof(ubuf->st_gid) gid = 0;
128 SET_UID(uid, stat->uid);
129 SET_GID(gid, stat->gid);
130 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
131 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
132 __put_user (stat->ino, &ubuf->__st_ino) ||
133 __put_user (stat->ino, &ubuf->st_ino) ||
134 __put_user (stat->mode, &ubuf->st_mode) ||
135 __put_user (stat->nlink, &ubuf->st_nlink) ||
136 __put_user (uid, &ubuf->st_uid) ||
137 __put_user (gid, &ubuf->st_gid) ||
138 __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
139 __put_user (stat->size, &ubuf->st_size) ||
140 __put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
141 __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
142 __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
143 __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
144 __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
145 __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
146 __put_user (stat->blksize, &ubuf->st_blksize) ||
147 __put_user (stat->blocks, &ubuf->st_blocks))
148 return -EFAULT;
149 return 0;
150 }
151
152 asmlinkage long
153 sys32_stat64(char __user * filename, struct stat64 __user *statbuf)
154 {
155 struct kstat stat;
156 int ret = vfs_stat(filename, &stat);
157 if (!ret)
158 ret = cp_stat64(statbuf, &stat);
159 return ret;
160 }
161
162 asmlinkage long
163 sys32_lstat64(char __user * filename, struct stat64 __user *statbuf)
164 {
165 struct kstat stat;
166 int ret = vfs_lstat(filename, &stat);
167 if (!ret)
168 ret = cp_stat64(statbuf, &stat);
169 return ret;
170 }
171
172 asmlinkage long
173 sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
174 {
175 struct kstat stat;
176 int ret = vfs_fstat(fd, &stat);
177 if (!ret)
178 ret = cp_stat64(statbuf, &stat);
179 return ret;
180 }
181
182 asmlinkage long
183 sys32_fstatat(unsigned int dfd, char __user *filename,
184 struct stat64 __user* statbuf, int flag)
185 {
186 struct kstat stat;
187 int error = -EINVAL;
188
189 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
190 goto out;
191
192 if (flag & AT_SYMLINK_NOFOLLOW)
193 error = vfs_lstat_fd(dfd, filename, &stat);
194 else
195 error = vfs_stat_fd(dfd, filename, &stat);
196
197 if (!error)
198 error = cp_stat64(statbuf, &stat);
199
200 out:
201 return error;
202 }
203
204 /*
205 * Linux/i386 didn't use to be able to handle more than
206 * 4 system call parameters, so these system calls used a memory
207 * block for parameter passing..
208 */
209
210 struct mmap_arg_struct {
211 unsigned int addr;
212 unsigned int len;
213 unsigned int prot;
214 unsigned int flags;
215 unsigned int fd;
216 unsigned int offset;
217 };
218
219 asmlinkage long
220 sys32_mmap(struct mmap_arg_struct __user *arg)
221 {
222 struct mmap_arg_struct a;
223 struct file *file = NULL;
224 unsigned long retval;
225 struct mm_struct *mm ;
226
227 if (copy_from_user(&a, arg, sizeof(a)))
228 return -EFAULT;
229
230 if (a.offset & ~PAGE_MASK)
231 return -EINVAL;
232
233 if (!(a.flags & MAP_ANONYMOUS)) {
234 file = fget(a.fd);
235 if (!file)
236 return -EBADF;
237 }
238
239 mm = current->mm;
240 down_write(&mm->mmap_sem);
241 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
242 if (file)
243 fput(file);
244
245 up_write(&mm->mmap_sem);
246
247 return retval;
248 }
249
250 asmlinkage long
251 sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
252 {
253 return sys_mprotect(start,len,prot);
254 }
255
256 asmlinkage long
257 sys32_pipe(int __user *fd)
258 {
259 int retval;
260 int fds[2];
261
262 retval = do_pipe(fds);
263 if (retval)
264 goto out;
265 if (copy_to_user(fd, fds, sizeof(fds)))
266 retval = -EFAULT;
267 out:
268 return retval;
269 }
270
271 asmlinkage long
272 sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
273 struct sigaction32 __user *oact, unsigned int sigsetsize)
274 {
275 struct k_sigaction new_ka, old_ka;
276 int ret;
277 compat_sigset_t set32;
278
279 /* XXX: Don't preclude handling different sized sigset_t's. */
280 if (sigsetsize != sizeof(compat_sigset_t))
281 return -EINVAL;
282
283 if (act) {
284 compat_uptr_t handler, restorer;
285
286 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
287 __get_user(handler, &act->sa_handler) ||
288 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
289 __get_user(restorer, &act->sa_restorer)||
290 __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
291 return -EFAULT;
292 new_ka.sa.sa_handler = compat_ptr(handler);
293 new_ka.sa.sa_restorer = compat_ptr(restorer);
294 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
295 switch (_NSIG_WORDS) {
296 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
297 | (((long)set32.sig[7]) << 32);
298 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
299 | (((long)set32.sig[5]) << 32);
300 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
301 | (((long)set32.sig[3]) << 32);
302 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
303 | (((long)set32.sig[1]) << 32);
304 }
305 }
306
307 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
308
309 if (!ret && oact) {
310 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
311 switch (_NSIG_WORDS) {
312 case 4:
313 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
314 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
315 case 3:
316 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
317 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
318 case 2:
319 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
320 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
321 case 1:
322 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
323 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
324 }
325 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
326 __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
327 __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
328 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
329 __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
330 return -EFAULT;
331 }
332
333 return ret;
334 }
335
336 asmlinkage long
337 sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
338 {
339 struct k_sigaction new_ka, old_ka;
340 int ret;
341
342 if (act) {
343 compat_old_sigset_t mask;
344 compat_uptr_t handler, restorer;
345
346 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
347 __get_user(handler, &act->sa_handler) ||
348 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
349 __get_user(restorer, &act->sa_restorer) ||
350 __get_user(mask, &act->sa_mask))
351 return -EFAULT;
352
353 new_ka.sa.sa_handler = compat_ptr(handler);
354 new_ka.sa.sa_restorer = compat_ptr(restorer);
355
356 siginitset(&new_ka.sa.sa_mask, mask);
357 }
358
359 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
360
361 if (!ret && oact) {
362 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
363 __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
364 __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
365 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
366 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
367 return -EFAULT;
368 }
369
370 return ret;
371 }
372
373 asmlinkage long
374 sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
375 compat_sigset_t __user *oset, unsigned int sigsetsize)
376 {
377 sigset_t s;
378 compat_sigset_t s32;
379 int ret;
380 mm_segment_t old_fs = get_fs();
381
382 if (set) {
383 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
384 return -EFAULT;
385 switch (_NSIG_WORDS) {
386 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
387 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
388 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
389 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
390 }
391 }
392 set_fs (KERNEL_DS);
393 ret = sys_rt_sigprocmask(how,
394 set ? (sigset_t __user *)&s : NULL,
395 oset ? (sigset_t __user *)&s : NULL,
396 sigsetsize);
397 set_fs (old_fs);
398 if (ret) return ret;
399 if (oset) {
400 switch (_NSIG_WORDS) {
401 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
402 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
403 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
404 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
405 }
406 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
407 return -EFAULT;
408 }
409 return 0;
410 }
411
412 static inline long
413 get_tv32(struct timeval *o, struct compat_timeval __user *i)
414 {
415 int err = -EFAULT;
416 if (access_ok(VERIFY_READ, i, sizeof(*i))) {
417 err = __get_user(o->tv_sec, &i->tv_sec);
418 err |= __get_user(o->tv_usec, &i->tv_usec);
419 }
420 return err;
421 }
422
423 static inline long
424 put_tv32(struct compat_timeval __user *o, struct timeval *i)
425 {
426 int err = -EFAULT;
427 if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
428 err = __put_user(i->tv_sec, &o->tv_sec);
429 err |= __put_user(i->tv_usec, &o->tv_usec);
430 }
431 return err;
432 }
433
434 extern unsigned int alarm_setitimer(unsigned int seconds);
435
436 asmlinkage long
437 sys32_alarm(unsigned int seconds)
438 {
439 return alarm_setitimer(seconds);
440 }
441
442 /* Translations due to time_t size differences. Which affects all
443 sorts of things, like timeval and itimerval. */
444
445 extern struct timezone sys_tz;
446
447 asmlinkage long
448 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
449 {
450 if (tv) {
451 struct timeval ktv;
452 do_gettimeofday(&ktv);
453 if (put_tv32(tv, &ktv))
454 return -EFAULT;
455 }
456 if (tz) {
457 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
458 return -EFAULT;
459 }
460 return 0;
461 }
462
463 asmlinkage long
464 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
465 {
466 struct timeval ktv;
467 struct timespec kts;
468 struct timezone ktz;
469
470 if (tv) {
471 if (get_tv32(&ktv, tv))
472 return -EFAULT;
473 kts.tv_sec = ktv.tv_sec;
474 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
475 }
476 if (tz) {
477 if (copy_from_user(&ktz, tz, sizeof(ktz)))
478 return -EFAULT;
479 }
480
481 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
482 }
483
484 struct sel_arg_struct {
485 unsigned int n;
486 unsigned int inp;
487 unsigned int outp;
488 unsigned int exp;
489 unsigned int tvp;
490 };
491
492 asmlinkage long
493 sys32_old_select(struct sel_arg_struct __user *arg)
494 {
495 struct sel_arg_struct a;
496
497 if (copy_from_user(&a, arg, sizeof(a)))
498 return -EFAULT;
499 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
500 compat_ptr(a.exp), compat_ptr(a.tvp));
501 }
502
503 extern asmlinkage long
504 compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
505 struct compat_rusage *ru);
506
507 asmlinkage long
508 sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
509 {
510 return compat_sys_wait4(pid, stat_addr, options, NULL);
511 }
512
513 /* 32-bit timeval and related flotsam. */
514
515 asmlinkage long
516 sys32_sysfs(int option, u32 arg1, u32 arg2)
517 {
518 return sys_sysfs(option, arg1, arg2);
519 }
520
521 struct sysinfo32 {
522 s32 uptime;
523 u32 loads[3];
524 u32 totalram;
525 u32 freeram;
526 u32 sharedram;
527 u32 bufferram;
528 u32 totalswap;
529 u32 freeswap;
530 unsigned short procs;
531 unsigned short pad;
532 u32 totalhigh;
533 u32 freehigh;
534 u32 mem_unit;
535 char _f[20-2*sizeof(u32)-sizeof(int)];
536 };
537
538 asmlinkage long
539 sys32_sysinfo(struct sysinfo32 __user *info)
540 {
541 struct sysinfo s;
542 int ret;
543 mm_segment_t old_fs = get_fs ();
544 int bitcount = 0;
545
546 set_fs (KERNEL_DS);
547 ret = sys_sysinfo((struct sysinfo __user *)&s);
548 set_fs (old_fs);
549
550 /* Check to see if any memory value is too large for 32-bit and scale
551 * down if needed
552 */
553 if ((s.totalram >> 32) || (s.totalswap >> 32)) {
554 while (s.mem_unit < PAGE_SIZE) {
555 s.mem_unit <<= 1;
556 bitcount++;
557 }
558 s.totalram >>= bitcount;
559 s.freeram >>= bitcount;
560 s.sharedram >>= bitcount;
561 s.bufferram >>= bitcount;
562 s.totalswap >>= bitcount;
563 s.freeswap >>= bitcount;
564 s.totalhigh >>= bitcount;
565 s.freehigh >>= bitcount;
566 }
567
568 if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
569 __put_user (s.uptime, &info->uptime) ||
570 __put_user (s.loads[0], &info->loads[0]) ||
571 __put_user (s.loads[1], &info->loads[1]) ||
572 __put_user (s.loads[2], &info->loads[2]) ||
573 __put_user (s.totalram, &info->totalram) ||
574 __put_user (s.freeram, &info->freeram) ||
575 __put_user (s.sharedram, &info->sharedram) ||
576 __put_user (s.bufferram, &info->bufferram) ||
577 __put_user (s.totalswap, &info->totalswap) ||
578 __put_user (s.freeswap, &info->freeswap) ||
579 __put_user (s.procs, &info->procs) ||
580 __put_user (s.totalhigh, &info->totalhigh) ||
581 __put_user (s.freehigh, &info->freehigh) ||
582 __put_user (s.mem_unit, &info->mem_unit))
583 return -EFAULT;
584 return 0;
585 }
586
587 asmlinkage long
588 sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
589 {
590 struct timespec t;
591 int ret;
592 mm_segment_t old_fs = get_fs ();
593
594 set_fs (KERNEL_DS);
595 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
596 set_fs (old_fs);
597 if (put_compat_timespec(&t, interval))
598 return -EFAULT;
599 return ret;
600 }
601
602 asmlinkage long
603 sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
604 {
605 sigset_t s;
606 compat_sigset_t s32;
607 int ret;
608 mm_segment_t old_fs = get_fs();
609
610 set_fs (KERNEL_DS);
611 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
612 set_fs (old_fs);
613 if (!ret) {
614 switch (_NSIG_WORDS) {
615 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
616 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
617 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
618 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
619 }
620 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
621 return -EFAULT;
622 }
623 return ret;
624 }
625
626 asmlinkage long
627 sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
628 {
629 siginfo_t info;
630 int ret;
631 mm_segment_t old_fs = get_fs();
632
633 if (copy_siginfo_from_user32(&info, uinfo))
634 return -EFAULT;
635 set_fs (KERNEL_DS);
636 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
637 set_fs (old_fs);
638 return ret;
639 }
640
641 /* These are here just in case some old ia32 binary calls it. */
642 asmlinkage long
643 sys32_pause(void)
644 {
645 current->state = TASK_INTERRUPTIBLE;
646 schedule();
647 return -ERESTARTNOHAND;
648 }
649
650
651 #ifdef CONFIG_SYSCTL_SYSCALL
652 struct sysctl_ia32 {
653 unsigned int name;
654 int nlen;
655 unsigned int oldval;
656 unsigned int oldlenp;
657 unsigned int newval;
658 unsigned int newlen;
659 unsigned int __unused[4];
660 };
661
662
663 asmlinkage long
664 sys32_sysctl(struct sysctl_ia32 __user *args32)
665 {
666 struct sysctl_ia32 a32;
667 mm_segment_t old_fs = get_fs ();
668 void __user *oldvalp, *newvalp;
669 size_t oldlen;
670 int __user *namep;
671 long ret;
672
673 if (copy_from_user(&a32, args32, sizeof (a32)))
674 return -EFAULT;
675
676 /*
677 * We need to pre-validate these because we have to disable address checking
678 * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
679 * user specifying bad addresses here. Well, since we're dealing with 32 bit
680 * addresses, we KNOW that access_ok() will always succeed, so this is an
681 * expensive NOP, but so what...
682 */
683 namep = compat_ptr(a32.name);
684 oldvalp = compat_ptr(a32.oldval);
685 newvalp = compat_ptr(a32.newval);
686
687 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
688 || !access_ok(VERIFY_WRITE, namep, 0)
689 || !access_ok(VERIFY_WRITE, oldvalp, 0)
690 || !access_ok(VERIFY_WRITE, newvalp, 0))
691 return -EFAULT;
692
693 set_fs(KERNEL_DS);
694 lock_kernel();
695 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
696 newvalp, (size_t) a32.newlen);
697 unlock_kernel();
698 set_fs(old_fs);
699
700 if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp)))
701 return -EFAULT;
702
703 return ret;
704 }
705 #endif
706
707 /* warning: next two assume little endian */
708 asmlinkage long
709 sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
710 {
711 return sys_pread64(fd, ubuf, count,
712 ((loff_t)AA(poshi) << 32) | AA(poslo));
713 }
714
715 asmlinkage long
716 sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
717 {
718 return sys_pwrite64(fd, ubuf, count,
719 ((loff_t)AA(poshi) << 32) | AA(poslo));
720 }
721
722
723 asmlinkage long
724 sys32_personality(unsigned long personality)
725 {
726 int ret;
727 if (personality(current->personality) == PER_LINUX32 &&
728 personality == PER_LINUX)
729 personality = PER_LINUX32;
730 ret = sys_personality(personality);
731 if (ret == PER_LINUX32)
732 ret = PER_LINUX;
733 return ret;
734 }
735
736 asmlinkage long
737 sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
738 {
739 mm_segment_t old_fs = get_fs();
740 int ret;
741 off_t of;
742
743 if (offset && get_user(of, offset))
744 return -EFAULT;
745
746 set_fs(KERNEL_DS);
747 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
748 count);
749 set_fs(old_fs);
750
751 if (offset && put_user(of, offset))
752 return -EFAULT;
753
754 return ret;
755 }
756
757 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
758 unsigned long prot, unsigned long flags,
759 unsigned long fd, unsigned long pgoff)
760 {
761 struct mm_struct *mm = current->mm;
762 unsigned long error;
763 struct file * file = NULL;
764
765 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
766 if (!(flags & MAP_ANONYMOUS)) {
767 file = fget(fd);
768 if (!file)
769 return -EBADF;
770 }
771
772 down_write(&mm->mmap_sem);
773 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
774 up_write(&mm->mmap_sem);
775
776 if (file)
777 fput(file);
778 return error;
779 }
780
781 asmlinkage long sys32_olduname(struct oldold_utsname __user * name)
782 {
783 int err;
784
785 if (!name)
786 return -EFAULT;
787 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
788 return -EFAULT;
789
790 down_read(&uts_sem);
791
792 err = __copy_to_user(&name->sysname,&system_utsname.sysname,
793 __OLD_UTS_LEN);
794 err |= __put_user(0,name->sysname+__OLD_UTS_LEN);
795 err |= __copy_to_user(&name->nodename,&system_utsname.nodename,
796 __OLD_UTS_LEN);
797 err |= __put_user(0,name->nodename+__OLD_UTS_LEN);
798 err |= __copy_to_user(&name->release,&system_utsname.release,
799 __OLD_UTS_LEN);
800 err |= __put_user(0,name->release+__OLD_UTS_LEN);
801 err |= __copy_to_user(&name->version,&system_utsname.version,
802 __OLD_UTS_LEN);
803 err |= __put_user(0,name->version+__OLD_UTS_LEN);
804 {
805 char *arch = "x86_64";
806 if (personality(current->personality) == PER_LINUX32)
807 arch = "i686";
808
809 err |= __copy_to_user(&name->machine,arch,strlen(arch)+1);
810 }
811
812 up_read(&uts_sem);
813
814 err = err ? -EFAULT : 0;
815
816 return err;
817 }
818
819 long sys32_uname(struct old_utsname __user * name)
820 {
821 int err;
822 if (!name)
823 return -EFAULT;
824 down_read(&uts_sem);
825 err=copy_to_user(name, &system_utsname, sizeof (*name));
826 up_read(&uts_sem);
827 if (personality(current->personality) == PER_LINUX32)
828 err |= copy_to_user(&name->machine, "i686", 5);
829 return err?-EFAULT:0;
830 }
831
832 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
833 {
834 struct ustat u;
835 mm_segment_t seg;
836 int ret;
837
838 seg = get_fs();
839 set_fs(KERNEL_DS);
840 ret = sys_ustat(dev, (struct ustat __user *)&u);
841 set_fs(seg);
842 if (ret >= 0) {
843 if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) ||
844 __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
845 __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
846 __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
847 __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
848 ret = -EFAULT;
849 }
850 return ret;
851 }
852
853 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
854 compat_uptr_t __user *envp, struct pt_regs *regs)
855 {
856 long error;
857 char * filename;
858
859 filename = getname(name);
860 error = PTR_ERR(filename);
861 if (IS_ERR(filename))
862 return error;
863 error = compat_do_execve(filename, argv, envp, regs);
864 if (error == 0) {
865 task_lock(current);
866 current->ptrace &= ~PT_DTRACE;
867 task_unlock(current);
868 }
869 putname(filename);
870 return error;
871 }
872
873 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
874 struct pt_regs *regs)
875 {
876 void __user *parent_tid = (void __user *)regs->rdx;
877 void __user *child_tid = (void __user *)regs->rdi;
878 if (!newsp)
879 newsp = regs->rsp;
880 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
881 }
882
883 /*
884 * Some system calls that need sign extended arguments. This could be done by a generic wrapper.
885 */
886
887 long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
888 {
889 return sys_lseek(fd, offset, whence);
890 }
891
892 long sys32_kill(int pid, int sig)
893 {
894 return sys_kill(pid, sig);
895 }
896
897 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
898 __u32 len_low, __u32 len_high, int advice)
899 {
900 return sys_fadvise64_64(fd,
901 (((u64)offset_high)<<32) | offset_low,
902 (((u64)len_high)<<32) | len_low,
903 advice);
904 }
905
906 long sys32_vm86_warning(void)
907 {
908 struct task_struct *me = current;
909 static char lastcomm[sizeof(me->comm)];
910 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
911 compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
912 me->comm);
913 strncpy(lastcomm, me->comm, sizeof(lastcomm));
914 }
915 return -ENOSYS;
916 }
917
918 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
919 char __user * buf, size_t len)
920 {
921 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
922 }
923
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