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dm: dec_pending needs locking to save error value
[linux-2.6/verdex.git] / arch / x86 / ia32 / sys_ia32.c
blob085a8c35f149423b75b5c83bd7a75bdd02acbae1
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/times.h>
30 #include <linux/utsname.h>
31 #include <linux/smp_lock.h>
32 #include <linux/mm.h>
33 #include <linux/uio.h>
34 #include <linux/poll.h>
35 #include <linux/personality.h>
36 #include <linux/stat.h>
37 #include <linux/rwsem.h>
38 #include <linux/compat.h>
39 #include <linux/vfs.h>
40 #include <linux/ptrace.h>
41 #include <linux/highuid.h>
42 #include <linux/sysctl.h>
43 #include <asm/mman.h>
44 #include <asm/types.h>
45 #include <asm/uaccess.h>
46 #include <asm/atomic.h>
47 #include <asm/vgtod.h>
48 #include <asm/sys_ia32.h>
49
50 #define AA(__x) ((unsigned long)(__x))
51
52
53 asmlinkage long sys32_truncate64(char __user *filename,
54 unsigned long offset_low,
55 unsigned long offset_high)
56 {
57 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
58 }
59
60 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
61 unsigned long offset_high)
62 {
63 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
64 }
65
66 /*
67 * Another set for IA32/LFS -- x86_64 struct stat is different due to
68 * support for 64bit inode numbers.
69 */
70 static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
71 {
72 typeof(ubuf->st_uid) uid = 0;
73 typeof(ubuf->st_gid) gid = 0;
74 SET_UID(uid, stat->uid);
75 SET_GID(gid, stat->gid);
76 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
77 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
78 __put_user(stat->ino, &ubuf->__st_ino) ||
79 __put_user(stat->ino, &ubuf->st_ino) ||
80 __put_user(stat->mode, &ubuf->st_mode) ||
81 __put_user(stat->nlink, &ubuf->st_nlink) ||
82 __put_user(uid, &ubuf->st_uid) ||
83 __put_user(gid, &ubuf->st_gid) ||
84 __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
85 __put_user(stat->size, &ubuf->st_size) ||
86 __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
87 __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
88 __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
89 __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
90 __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
91 __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
92 __put_user(stat->blksize, &ubuf->st_blksize) ||
93 __put_user(stat->blocks, &ubuf->st_blocks))
94 return -EFAULT;
95 return 0;
96 }
97
98 asmlinkage long sys32_stat64(char __user *filename,
99 struct stat64 __user *statbuf)
100 {
101 struct kstat stat;
102 int ret = vfs_stat(filename, &stat);
103
104 if (!ret)
105 ret = cp_stat64(statbuf, &stat);
106 return ret;
107 }
108
109 asmlinkage long sys32_lstat64(char __user *filename,
110 struct stat64 __user *statbuf)
111 {
112 struct kstat stat;
113 int ret = vfs_lstat(filename, &stat);
114 if (!ret)
115 ret = cp_stat64(statbuf, &stat);
116 return ret;
117 }
118
119 asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
120 {
121 struct kstat stat;
122 int ret = vfs_fstat(fd, &stat);
123 if (!ret)
124 ret = cp_stat64(statbuf, &stat);
125 return ret;
126 }
127
128 asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
129 struct stat64 __user *statbuf, int flag)
130 {
131 struct kstat stat;
132 int error;
133
134 error = vfs_fstatat(dfd, filename, &stat, flag);
135 if (error)
136 return error;
137 return cp_stat64(statbuf, &stat);
138 }
139
140 /*
141 * Linux/i386 didn't use to be able to handle more than
142 * 4 system call parameters, so these system calls used a memory
143 * block for parameter passing..
144 */
145
146 struct mmap_arg_struct {
147 unsigned int addr;
148 unsigned int len;
149 unsigned int prot;
150 unsigned int flags;
151 unsigned int fd;
152 unsigned int offset;
153 };
154
155 asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
156 {
157 struct mmap_arg_struct a;
158 struct file *file = NULL;
159 unsigned long retval;
160 struct mm_struct *mm ;
161
162 if (copy_from_user(&a, arg, sizeof(a)))
163 return -EFAULT;
164
165 if (a.offset & ~PAGE_MASK)
166 return -EINVAL;
167
168 if (!(a.flags & MAP_ANONYMOUS)) {
169 file = fget(a.fd);
170 if (!file)
171 return -EBADF;
172 }
173
174 mm = current->mm;
175 down_write(&mm->mmap_sem);
176 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
177 a.offset>>PAGE_SHIFT);
178 if (file)
179 fput(file);
180
181 up_write(&mm->mmap_sem);
182
183 return retval;
184 }
185
186 asmlinkage long sys32_mprotect(unsigned long start, size_t len,
187 unsigned long prot)
188 {
189 return sys_mprotect(start, len, prot);
190 }
191
192 asmlinkage long sys32_pipe(int __user *fd)
193 {
194 int retval;
195 int fds[2];
196
197 retval = do_pipe_flags(fds, 0);
198 if (retval)
199 goto out;
200 if (copy_to_user(fd, fds, sizeof(fds)))
201 retval = -EFAULT;
202 out:
203 return retval;
204 }
205
206 asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
207 struct sigaction32 __user *oact,
208 unsigned int sigsetsize)
209 {
210 struct k_sigaction new_ka, old_ka;
211 int ret;
212 compat_sigset_t set32;
213
214 /* XXX: Don't preclude handling different sized sigset_t's. */
215 if (sigsetsize != sizeof(compat_sigset_t))
216 return -EINVAL;
217
218 if (act) {
219 compat_uptr_t handler, restorer;
220
221 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
222 __get_user(handler, &act->sa_handler) ||
223 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
224 __get_user(restorer, &act->sa_restorer) ||
225 __copy_from_user(&set32, &act->sa_mask,
226 sizeof(compat_sigset_t)))
227 return -EFAULT;
228 new_ka.sa.sa_handler = compat_ptr(handler);
229 new_ka.sa.sa_restorer = compat_ptr(restorer);
230
231 /*
232 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
233 * than _NSIG_WORDS << 1
234 */
235 switch (_NSIG_WORDS) {
236 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
237 | (((long)set32.sig[7]) << 32);
238 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
239 | (((long)set32.sig[5]) << 32);
240 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
241 | (((long)set32.sig[3]) << 32);
242 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
243 | (((long)set32.sig[1]) << 32);
244 }
245 }
246
247 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
248
249 if (!ret && oact) {
250 /*
251 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
252 * than _NSIG_WORDS << 1
253 */
254 switch (_NSIG_WORDS) {
255 case 4:
256 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
257 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
258 case 3:
259 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
260 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
261 case 2:
262 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
263 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
264 case 1:
265 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
266 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
267 }
268 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
269 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
270 &oact->sa_handler) ||
271 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
272 &oact->sa_restorer) ||
273 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
274 __copy_to_user(&oact->sa_mask, &set32,
275 sizeof(compat_sigset_t)))
276 return -EFAULT;
277 }
278
279 return ret;
280 }
281
282 asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
283 struct old_sigaction32 __user *oact)
284 {
285 struct k_sigaction new_ka, old_ka;
286 int ret;
287
288 if (act) {
289 compat_old_sigset_t mask;
290 compat_uptr_t handler, restorer;
291
292 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
293 __get_user(handler, &act->sa_handler) ||
294 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
295 __get_user(restorer, &act->sa_restorer) ||
296 __get_user(mask, &act->sa_mask))
297 return -EFAULT;
298
299 new_ka.sa.sa_handler = compat_ptr(handler);
300 new_ka.sa.sa_restorer = compat_ptr(restorer);
301
302 siginitset(&new_ka.sa.sa_mask, mask);
303 }
304
305 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
306
307 if (!ret && oact) {
308 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
309 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
310 &oact->sa_handler) ||
311 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
312 &oact->sa_restorer) ||
313 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
314 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
315 return -EFAULT;
316 }
317
318 return ret;
319 }
320
321 asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
322 compat_sigset_t __user *oset,
323 unsigned int sigsetsize)
324 {
325 sigset_t s;
326 compat_sigset_t s32;
327 int ret;
328 mm_segment_t old_fs = get_fs();
329
330 if (set) {
331 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
332 return -EFAULT;
333 switch (_NSIG_WORDS) {
334 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
335 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
336 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
337 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
338 }
339 }
340 set_fs(KERNEL_DS);
341 ret = sys_rt_sigprocmask(how,
342 set ? (sigset_t __user *)&s : NULL,
343 oset ? (sigset_t __user *)&s : NULL,
344 sigsetsize);
345 set_fs(old_fs);
346 if (ret)
347 return ret;
348 if (oset) {
349 switch (_NSIG_WORDS) {
350 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
351 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
352 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
353 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
354 }
355 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
356 return -EFAULT;
357 }
358 return 0;
359 }
360
361 asmlinkage long sys32_alarm(unsigned int seconds)
362 {
363 return alarm_setitimer(seconds);
364 }
365
366 struct sel_arg_struct {
367 unsigned int n;
368 unsigned int inp;
369 unsigned int outp;
370 unsigned int exp;
371 unsigned int tvp;
372 };
373
374 asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
375 {
376 struct sel_arg_struct a;
377
378 if (copy_from_user(&a, arg, sizeof(a)))
379 return -EFAULT;
380 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
381 compat_ptr(a.exp), compat_ptr(a.tvp));
382 }
383
384 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
385 int options)
386 {
387 return compat_sys_wait4(pid, stat_addr, options, NULL);
388 }
389
390 /* 32-bit timeval and related flotsam. */
391
392 asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
393 {
394 return sys_sysfs(option, arg1, arg2);
395 }
396
397 asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
398 struct compat_timespec __user *interval)
399 {
400 struct timespec t;
401 int ret;
402 mm_segment_t old_fs = get_fs();
403
404 set_fs(KERNEL_DS);
405 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
406 set_fs(old_fs);
407 if (put_compat_timespec(&t, interval))
408 return -EFAULT;
409 return ret;
410 }
411
412 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
413 compat_size_t sigsetsize)
414 {
415 sigset_t s;
416 compat_sigset_t s32;
417 int ret;
418 mm_segment_t old_fs = get_fs();
419
420 set_fs(KERNEL_DS);
421 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
422 set_fs(old_fs);
423 if (!ret) {
424 switch (_NSIG_WORDS) {
425 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
426 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
427 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
428 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
429 }
430 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
431 return -EFAULT;
432 }
433 return ret;
434 }
435
436 asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
437 compat_siginfo_t __user *uinfo)
438 {
439 siginfo_t info;
440 int ret;
441 mm_segment_t old_fs = get_fs();
442
443 if (copy_siginfo_from_user32(&info, uinfo))
444 return -EFAULT;
445 set_fs(KERNEL_DS);
446 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
447 set_fs(old_fs);
448 return ret;
449 }
450
451 #ifdef CONFIG_SYSCTL_SYSCALL
452 struct sysctl_ia32 {
453 unsigned int name;
454 int nlen;
455 unsigned int oldval;
456 unsigned int oldlenp;
457 unsigned int newval;
458 unsigned int newlen;
459 unsigned int __unused[4];
460 };
461
462
463 asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
464 {
465 struct sysctl_ia32 a32;
466 mm_segment_t old_fs = get_fs();
467 void __user *oldvalp, *newvalp;
468 size_t oldlen;
469 int __user *namep;
470 long ret;
471
472 if (copy_from_user(&a32, args32, sizeof(a32)))
473 return -EFAULT;
474
475 /*
476 * We need to pre-validate these because we have to disable
477 * address checking before calling do_sysctl() because of
478 * OLDLEN but we can't run the risk of the user specifying bad
479 * addresses here. Well, since we're dealing with 32 bit
480 * addresses, we KNOW that access_ok() will always succeed, so
481 * this is an expensive NOP, but so what...
482 */
483 namep = compat_ptr(a32.name);
484 oldvalp = compat_ptr(a32.oldval);
485 newvalp = compat_ptr(a32.newval);
486
487 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
488 || !access_ok(VERIFY_WRITE, namep, 0)
489 || !access_ok(VERIFY_WRITE, oldvalp, 0)
490 || !access_ok(VERIFY_WRITE, newvalp, 0))
491 return -EFAULT;
492
493 set_fs(KERNEL_DS);
494 lock_kernel();
495 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
496 newvalp, (size_t) a32.newlen);
497 unlock_kernel();
498 set_fs(old_fs);
499
500 if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
501 return -EFAULT;
502
503 return ret;
504 }
505 #endif
506
507 /* warning: next two assume little endian */
508 asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
509 u32 poslo, u32 poshi)
510 {
511 return sys_pread64(fd, ubuf, count,
512 ((loff_t)AA(poshi) << 32) | AA(poslo));
513 }
514
515 asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
516 u32 poslo, u32 poshi)
517 {
518 return sys_pwrite64(fd, ubuf, count,
519 ((loff_t)AA(poshi) << 32) | AA(poslo));
520 }
521
522
523 asmlinkage long sys32_personality(unsigned long personality)
524 {
525 int ret;
526
527 if (personality(current->personality) == PER_LINUX32 &&
528 personality == PER_LINUX)
529 personality = PER_LINUX32;
530 ret = sys_personality(personality);
531 if (ret == PER_LINUX32)
532 ret = PER_LINUX;
533 return ret;
534 }
535
536 asmlinkage long sys32_sendfile(int out_fd, int in_fd,
537 compat_off_t __user *offset, s32 count)
538 {
539 mm_segment_t old_fs = get_fs();
540 int ret;
541 off_t of;
542
543 if (offset && get_user(of, offset))
544 return -EFAULT;
545
546 set_fs(KERNEL_DS);
547 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
548 count);
549 set_fs(old_fs);
550
551 if (offset && put_user(of, offset))
552 return -EFAULT;
553 return ret;
554 }
555
556 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
557 unsigned long prot, unsigned long flags,
558 unsigned long fd, unsigned long pgoff)
559 {
560 struct mm_struct *mm = current->mm;
561 unsigned long error;
562 struct file *file = NULL;
563
564 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
565 if (!(flags & MAP_ANONYMOUS)) {
566 file = fget(fd);
567 if (!file)
568 return -EBADF;
569 }
570
571 down_write(&mm->mmap_sem);
572 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
573 up_write(&mm->mmap_sem);
574
575 if (file)
576 fput(file);
577 return error;
578 }
579
580 asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
581 {
582 char *arch = "x86_64";
583 int err;
584
585 if (!name)
586 return -EFAULT;
587 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
588 return -EFAULT;
589
590 down_read(&uts_sem);
591
592 err = __copy_to_user(&name->sysname, &utsname()->sysname,
593 __OLD_UTS_LEN);
594 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
595 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
596 __OLD_UTS_LEN);
597 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
598 err |= __copy_to_user(&name->release, &utsname()->release,
599 __OLD_UTS_LEN);
600 err |= __put_user(0, name->release+__OLD_UTS_LEN);
601 err |= __copy_to_user(&name->version, &utsname()->version,
602 __OLD_UTS_LEN);
603 err |= __put_user(0, name->version+__OLD_UTS_LEN);
604
605 if (personality(current->personality) == PER_LINUX32)
606 arch = "i686";
607
608 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
609
610 up_read(&uts_sem);
611
612 err = err ? -EFAULT : 0;
613
614 return err;
615 }
616
617 long sys32_uname(struct old_utsname __user *name)
618 {
619 int err;
620
621 if (!name)
622 return -EFAULT;
623 down_read(&uts_sem);
624 err = copy_to_user(name, utsname(), sizeof(*name));
625 up_read(&uts_sem);
626 if (personality(current->personality) == PER_LINUX32)
627 err |= copy_to_user(&name->machine, "i686", 5);
628
629 return err ? -EFAULT : 0;
630 }
631
632 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
633 compat_uptr_t __user *envp, struct pt_regs *regs)
634 {
635 long error;
636 char *filename;
637
638 filename = getname(name);
639 error = PTR_ERR(filename);
640 if (IS_ERR(filename))
641 return error;
642 error = compat_do_execve(filename, argv, envp, regs);
643 putname(filename);
644 return error;
645 }
646
647 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
648 struct pt_regs *regs)
649 {
650 void __user *parent_tid = (void __user *)regs->dx;
651 void __user *child_tid = (void __user *)regs->di;
652
653 if (!newsp)
654 newsp = regs->sp;
655 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
656 }
657
658 /*
659 * Some system calls that need sign extended arguments. This could be
660 * done by a generic wrapper.
661 */
662 long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
663 {
664 return sys_lseek(fd, offset, whence);
665 }
666
667 long sys32_kill(int pid, int sig)
668 {
669 return sys_kill(pid, sig);
670 }
671
672 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
673 __u32 len_low, __u32 len_high, int advice)
674 {
675 return sys_fadvise64_64(fd,
676 (((u64)offset_high)<<32) | offset_low,
677 (((u64)len_high)<<32) | len_low,
678 advice);
679 }
680
681 long sys32_vm86_warning(void)
682 {
683 struct task_struct *me = current;
684 static char lastcomm[sizeof(me->comm)];
685
686 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
687 compat_printk(KERN_INFO
688 "%s: vm86 mode not supported on 64 bit kernel\n",
689 me->comm);
690 strncpy(lastcomm, me->comm, sizeof(lastcomm));
691 }
692 return -ENOSYS;
693 }
694
695 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
696 char __user *buf, size_t len)
697 {
698 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
699 }
700
701 asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
702 size_t count)
703 {
704 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
705 }
706
707 asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
708 unsigned n_low, unsigned n_hi, int flags)
709 {
710 return sys_sync_file_range(fd,
711 ((u64)off_hi << 32) | off_low,
712 ((u64)n_hi << 32) | n_low, flags);
713 }
714
715 asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
716 size_t len, int advice)
717 {
718 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
719 len, advice);
720 }
721
722 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
723 unsigned offset_hi, unsigned len_lo,
724 unsigned len_hi)
725 {
726 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
727 ((u64)len_hi << 32) | len_lo);
728 }
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