2 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
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)
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.
17 * This file assumes that there is a hole at the end of user address space.
19 * Some of the functions are LE specific currently. These are
20 * hopefully all marked. This should be fixed.
23 #include <linux/kernel.h>
24 #include <linux/sched.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>
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>
44 #include <asm/types.h>
45 #include <asm/uaccess.h>
46 #include <asm/atomic.h>
48 #include <asm/vgtod.h>
50 #define AA(__x) ((unsigned long)(__x))
52 int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
56 typeof(ubuf->st_uid) uid = 0;
57 typeof(ubuf->st_gid) gid = 0;
58 SET_UID(uid, kbuf->uid);
59 SET_GID(gid, kbuf->gid);
60 if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
62 if (kbuf->size >= 0x7fffffff)
65 if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
67 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
68 __put_user(old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
69 __put_user(ino, &ubuf->st_ino) ||
70 __put_user(kbuf->mode, &ubuf->st_mode) ||
71 __put_user(kbuf->nlink, &ubuf->st_nlink) ||
72 __put_user(uid, &ubuf->st_uid) ||
73 __put_user(gid, &ubuf->st_gid) ||
74 __put_user(old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
75 __put_user(kbuf->size, &ubuf->st_size) ||
76 __put_user(kbuf->atime.tv_sec, &ubuf->st_atime) ||
77 __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
78 __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
79 __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
80 __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
81 __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
82 __put_user(kbuf->blksize, &ubuf->st_blksize) ||
83 __put_user(kbuf->blocks, &ubuf->st_blocks))
88 asmlinkage long sys32_truncate64(char __user *filename,
89 unsigned long offset_low,
90 unsigned long offset_high)
92 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
95 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
96 unsigned long offset_high)
98 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
102 * Another set for IA32/LFS -- x86_64 struct stat is different due to
103 * support for 64bit inode numbers.
105 static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
107 typeof(ubuf->st_uid) uid = 0;
108 typeof(ubuf->st_gid) gid = 0;
109 SET_UID(uid, stat->uid);
110 SET_GID(gid, stat->gid);
111 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
112 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
113 __put_user(stat->ino, &ubuf->__st_ino) ||
114 __put_user(stat->ino, &ubuf->st_ino) ||
115 __put_user(stat->mode, &ubuf->st_mode) ||
116 __put_user(stat->nlink, &ubuf->st_nlink) ||
117 __put_user(uid, &ubuf->st_uid) ||
118 __put_user(gid, &ubuf->st_gid) ||
119 __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
120 __put_user(stat->size, &ubuf->st_size) ||
121 __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
122 __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
123 __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
124 __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
125 __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
126 __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
127 __put_user(stat->blksize, &ubuf->st_blksize) ||
128 __put_user(stat->blocks, &ubuf->st_blocks))
133 asmlinkage long sys32_stat64(char __user *filename,
134 struct stat64 __user *statbuf)
137 int ret = vfs_stat(filename, &stat);
140 ret = cp_stat64(statbuf, &stat);
144 asmlinkage long sys32_lstat64(char __user *filename,
145 struct stat64 __user *statbuf)
148 int ret = vfs_lstat(filename, &stat);
150 ret = cp_stat64(statbuf, &stat);
154 asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
157 int ret = vfs_fstat(fd, &stat);
159 ret = cp_stat64(statbuf, &stat);
163 asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
164 struct stat64 __user *statbuf, int flag)
169 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
172 if (flag & AT_SYMLINK_NOFOLLOW)
173 error = vfs_lstat_fd(dfd, filename, &stat);
175 error = vfs_stat_fd(dfd, filename, &stat);
178 error = cp_stat64(statbuf, &stat);
185 * Linux/i386 didn't use to be able to handle more than
186 * 4 system call parameters, so these system calls used a memory
187 * block for parameter passing..
190 struct mmap_arg_struct {
199 asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
201 struct mmap_arg_struct a;
202 struct file *file = NULL;
203 unsigned long retval;
204 struct mm_struct *mm ;
206 if (copy_from_user(&a, arg, sizeof(a)))
209 if (a.offset & ~PAGE_MASK)
212 if (!(a.flags & MAP_ANONYMOUS)) {
219 down_write(&mm->mmap_sem);
220 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
221 a.offset>>PAGE_SHIFT);
225 up_write(&mm->mmap_sem);
230 asmlinkage long sys32_mprotect(unsigned long start, size_t len,
233 return sys_mprotect(start, len, prot);
236 asmlinkage long sys32_pipe(int __user *fd)
241 retval = do_pipe(fds);
244 if (copy_to_user(fd, fds, sizeof(fds)))
250 asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
251 struct sigaction32 __user *oact,
252 unsigned int sigsetsize)
254 struct k_sigaction new_ka, old_ka;
256 compat_sigset_t set32;
258 /* XXX: Don't preclude handling different sized sigset_t's. */
259 if (sigsetsize != sizeof(compat_sigset_t))
263 compat_uptr_t handler, restorer;
265 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
266 __get_user(handler, &act->sa_handler) ||
267 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
268 __get_user(restorer, &act->sa_restorer) ||
269 __copy_from_user(&set32, &act->sa_mask,
270 sizeof(compat_sigset_t)))
272 new_ka.sa.sa_handler = compat_ptr(handler);
273 new_ka.sa.sa_restorer = compat_ptr(restorer);
276 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
277 * than _NSIG_WORDS << 1
279 switch (_NSIG_WORDS) {
280 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
281 | (((long)set32.sig[7]) << 32);
282 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
283 | (((long)set32.sig[5]) << 32);
284 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
285 | (((long)set32.sig[3]) << 32);
286 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
287 | (((long)set32.sig[1]) << 32);
291 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
295 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
296 * than _NSIG_WORDS << 1
298 switch (_NSIG_WORDS) {
300 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
301 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
303 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
304 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
306 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
307 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
309 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
310 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
312 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
313 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
314 &oact->sa_handler) ||
315 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
316 &oact->sa_restorer) ||
317 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
318 __copy_to_user(&oact->sa_mask, &set32,
319 sizeof(compat_sigset_t)))
326 asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
327 struct old_sigaction32 __user *oact)
329 struct k_sigaction new_ka, old_ka;
333 compat_old_sigset_t mask;
334 compat_uptr_t handler, restorer;
336 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
337 __get_user(handler, &act->sa_handler) ||
338 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
339 __get_user(restorer, &act->sa_restorer) ||
340 __get_user(mask, &act->sa_mask))
343 new_ka.sa.sa_handler = compat_ptr(handler);
344 new_ka.sa.sa_restorer = compat_ptr(restorer);
346 siginitset(&new_ka.sa.sa_mask, mask);
349 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
352 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
353 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
354 &oact->sa_handler) ||
355 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
356 &oact->sa_restorer) ||
357 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
358 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
365 asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
366 compat_sigset_t __user *oset,
367 unsigned int sigsetsize)
372 mm_segment_t old_fs = get_fs();
375 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
377 switch (_NSIG_WORDS) {
378 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
379 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
380 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
381 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
385 ret = sys_rt_sigprocmask(how,
386 set ? (sigset_t __user *)&s : NULL,
387 oset ? (sigset_t __user *)&s : NULL,
393 switch (_NSIG_WORDS) {
394 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
395 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
396 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
397 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
399 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
405 static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
409 if (access_ok(VERIFY_READ, i, sizeof(*i))) {
410 err = __get_user(o->tv_sec, &i->tv_sec);
411 err |= __get_user(o->tv_usec, &i->tv_usec);
416 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
420 if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
421 err = __put_user(i->tv_sec, &o->tv_sec);
422 err |= __put_user(i->tv_usec, &o->tv_usec);
427 asmlinkage long sys32_alarm(unsigned int seconds)
429 return alarm_setitimer(seconds);
433 * Translations due to time_t size differences. Which affects all
434 * sorts of things, like timeval and itimerval.
436 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
437 struct timezone __user *tz)
442 do_gettimeofday(&ktv);
443 if (put_tv32(tv, &ktv))
447 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
453 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
454 struct timezone __user *tz)
461 if (get_tv32(&ktv, tv))
463 kts.tv_sec = ktv.tv_sec;
464 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
467 if (copy_from_user(&ktz, tz, sizeof(ktz)))
471 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
474 struct sel_arg_struct {
482 asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
484 struct sel_arg_struct a;
486 if (copy_from_user(&a, arg, sizeof(a)))
488 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
489 compat_ptr(a.exp), compat_ptr(a.tvp));
492 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
495 return compat_sys_wait4(pid, stat_addr, options, NULL);
498 /* 32-bit timeval and related flotsam. */
500 asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
502 return sys_sysfs(option, arg1, arg2);
505 asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
506 struct compat_timespec __user *interval)
510 mm_segment_t old_fs = get_fs();
513 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
515 if (put_compat_timespec(&t, interval))
520 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
521 compat_size_t sigsetsize)
526 mm_segment_t old_fs = get_fs();
529 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
532 switch (_NSIG_WORDS) {
533 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
534 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
535 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
536 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
538 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
544 asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
545 compat_siginfo_t __user *uinfo)
549 mm_segment_t old_fs = get_fs();
551 if (copy_siginfo_from_user32(&info, uinfo))
554 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
559 /* These are here just in case some old ia32 binary calls it. */
560 asmlinkage long sys32_pause(void)
562 current->state = TASK_INTERRUPTIBLE;
564 return -ERESTARTNOHAND;
568 #ifdef CONFIG_SYSCTL_SYSCALL
573 unsigned int oldlenp;
576 unsigned int __unused[4];
580 asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
582 struct sysctl_ia32 a32;
583 mm_segment_t old_fs = get_fs();
584 void __user *oldvalp, *newvalp;
589 if (copy_from_user(&a32, args32, sizeof(a32)))
593 * We need to pre-validate these because we have to disable
594 * address checking before calling do_sysctl() because of
595 * OLDLEN but we can't run the risk of the user specifying bad
596 * addresses here. Well, since we're dealing with 32 bit
597 * addresses, we KNOW that access_ok() will always succeed, so
598 * this is an expensive NOP, but so what...
600 namep = compat_ptr(a32.name);
601 oldvalp = compat_ptr(a32.oldval);
602 newvalp = compat_ptr(a32.newval);
604 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
605 || !access_ok(VERIFY_WRITE, namep, 0)
606 || !access_ok(VERIFY_WRITE, oldvalp, 0)
607 || !access_ok(VERIFY_WRITE, newvalp, 0))
612 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
613 newvalp, (size_t) a32.newlen);
617 if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
624 /* warning: next two assume little endian */
625 asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
626 u32 poslo, u32 poshi)
628 return sys_pread64(fd, ubuf, count,
629 ((loff_t)AA(poshi) << 32) | AA(poslo));
632 asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
633 u32 poslo, u32 poshi)
635 return sys_pwrite64(fd, ubuf, count,
636 ((loff_t)AA(poshi) << 32) | AA(poslo));
640 asmlinkage long sys32_personality(unsigned long personality)
644 if (personality(current->personality) == PER_LINUX32 &&
645 personality == PER_LINUX)
646 personality = PER_LINUX32;
647 ret = sys_personality(personality);
648 if (ret == PER_LINUX32)
653 asmlinkage long sys32_sendfile(int out_fd, int in_fd,
654 compat_off_t __user *offset, s32 count)
656 mm_segment_t old_fs = get_fs();
660 if (offset && get_user(of, offset))
664 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
668 if (offset && put_user(of, offset))
673 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
674 unsigned long prot, unsigned long flags,
675 unsigned long fd, unsigned long pgoff)
677 struct mm_struct *mm = current->mm;
679 struct file *file = NULL;
681 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
682 if (!(flags & MAP_ANONYMOUS)) {
688 down_write(&mm->mmap_sem);
689 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
690 up_write(&mm->mmap_sem);
697 asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
699 char *arch = "x86_64";
704 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
709 err = __copy_to_user(&name->sysname, &utsname()->sysname,
711 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
712 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
714 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
715 err |= __copy_to_user(&name->release, &utsname()->release,
717 err |= __put_user(0, name->release+__OLD_UTS_LEN);
718 err |= __copy_to_user(&name->version, &utsname()->version,
720 err |= __put_user(0, name->version+__OLD_UTS_LEN);
722 if (personality(current->personality) == PER_LINUX32)
725 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
729 err = err ? -EFAULT : 0;
734 long sys32_uname(struct old_utsname __user *name)
741 err = copy_to_user(name, utsname(), sizeof(*name));
743 if (personality(current->personality) == PER_LINUX32)
744 err |= copy_to_user(&name->machine, "i686", 5);
746 return err ? -EFAULT : 0;
749 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
757 ret = sys_ustat(dev, (struct ustat __user *)&u);
762 if (!access_ok(VERIFY_WRITE, u32p, sizeof(struct ustat32)) ||
763 __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
764 __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
765 __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
766 __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
771 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
772 compat_uptr_t __user *envp, struct pt_regs *regs)
777 filename = getname(name);
778 error = PTR_ERR(filename);
779 if (IS_ERR(filename))
781 error = compat_do_execve(filename, argv, envp, regs);
786 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
787 struct pt_regs *regs)
789 void __user *parent_tid = (void __user *)regs->dx;
790 void __user *child_tid = (void __user *)regs->di;
794 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
798 * Some system calls that need sign extended arguments. This could be
799 * done by a generic wrapper.
801 long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
803 return sys_lseek(fd, offset, whence);
806 long sys32_kill(int pid, int sig)
808 return sys_kill(pid, sig);
811 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
812 __u32 len_low, __u32 len_high, int advice)
814 return sys_fadvise64_64(fd,
815 (((u64)offset_high)<<32) | offset_low,
816 (((u64)len_high)<<32) | len_low,
820 long sys32_vm86_warning(void)
822 struct task_struct *me = current;
823 static char lastcomm[sizeof(me->comm)];
825 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
826 compat_printk(KERN_INFO
827 "%s: vm86 mode not supported on 64 bit kernel\n",
829 strncpy(lastcomm, me->comm, sizeof(lastcomm));
834 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
835 char __user *buf, size_t len)
837 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
840 asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
843 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
846 asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
847 unsigned n_low, unsigned n_hi, int flags)
849 return sys_sync_file_range(fd,
850 ((u64)off_hi << 32) | off_low,
851 ((u64)n_hi << 32) | n_low, flags);
854 asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
855 size_t len, int advice)
857 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
861 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
862 unsigned offset_hi, unsigned len_lo,
865 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
866 ((u64)len_hi << 32) | len_lo);