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/semaphore.h>
47 #include <asm/atomic.h>
49 #include <asm/vgtod.h>
51 #define AA(__x) ((unsigned long)(__x))
53 int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
57 typeof(ubuf->st_uid) uid = 0;
58 typeof(ubuf->st_gid) gid = 0;
59 SET_UID(uid, kbuf->uid);
60 SET_GID(gid, kbuf->gid);
61 if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
63 if (kbuf->size >= 0x7fffffff)
66 if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
68 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
69 __put_user(old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
70 __put_user(ino, &ubuf->st_ino) ||
71 __put_user(kbuf->mode, &ubuf->st_mode) ||
72 __put_user(kbuf->nlink, &ubuf->st_nlink) ||
73 __put_user(uid, &ubuf->st_uid) ||
74 __put_user(gid, &ubuf->st_gid) ||
75 __put_user(old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
76 __put_user(kbuf->size, &ubuf->st_size) ||
77 __put_user(kbuf->atime.tv_sec, &ubuf->st_atime) ||
78 __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
79 __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
80 __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
81 __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
82 __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
83 __put_user(kbuf->blksize, &ubuf->st_blksize) ||
84 __put_user(kbuf->blocks, &ubuf->st_blocks))
89 asmlinkage long sys32_truncate64(char __user *filename,
90 unsigned long offset_low,
91 unsigned long offset_high)
93 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
96 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
97 unsigned long offset_high)
99 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
103 * Another set for IA32/LFS -- x86_64 struct stat is different due to
104 * support for 64bit inode numbers.
106 static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
108 typeof(ubuf->st_uid) uid = 0;
109 typeof(ubuf->st_gid) gid = 0;
110 SET_UID(uid, stat->uid);
111 SET_GID(gid, stat->gid);
112 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
113 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
114 __put_user(stat->ino, &ubuf->__st_ino) ||
115 __put_user(stat->ino, &ubuf->st_ino) ||
116 __put_user(stat->mode, &ubuf->st_mode) ||
117 __put_user(stat->nlink, &ubuf->st_nlink) ||
118 __put_user(uid, &ubuf->st_uid) ||
119 __put_user(gid, &ubuf->st_gid) ||
120 __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
121 __put_user(stat->size, &ubuf->st_size) ||
122 __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
123 __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
124 __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
125 __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
126 __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
127 __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
128 __put_user(stat->blksize, &ubuf->st_blksize) ||
129 __put_user(stat->blocks, &ubuf->st_blocks))
134 asmlinkage long sys32_stat64(char __user *filename,
135 struct stat64 __user *statbuf)
138 int ret = vfs_stat(filename, &stat);
141 ret = cp_stat64(statbuf, &stat);
145 asmlinkage long sys32_lstat64(char __user *filename,
146 struct stat64 __user *statbuf)
149 int ret = vfs_lstat(filename, &stat);
151 ret = cp_stat64(statbuf, &stat);
155 asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
158 int ret = vfs_fstat(fd, &stat);
160 ret = cp_stat64(statbuf, &stat);
164 asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
165 struct stat64 __user *statbuf, int flag)
170 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
173 if (flag & AT_SYMLINK_NOFOLLOW)
174 error = vfs_lstat_fd(dfd, filename, &stat);
176 error = vfs_stat_fd(dfd, filename, &stat);
179 error = cp_stat64(statbuf, &stat);
186 * Linux/i386 didn't use to be able to handle more than
187 * 4 system call parameters, so these system calls used a memory
188 * block for parameter passing..
191 struct mmap_arg_struct {
200 asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
202 struct mmap_arg_struct a;
203 struct file *file = NULL;
204 unsigned long retval;
205 struct mm_struct *mm ;
207 if (copy_from_user(&a, arg, sizeof(a)))
210 if (a.offset & ~PAGE_MASK)
213 if (!(a.flags & MAP_ANONYMOUS)) {
220 down_write(&mm->mmap_sem);
221 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
222 a.offset>>PAGE_SHIFT);
226 up_write(&mm->mmap_sem);
231 asmlinkage long sys32_mprotect(unsigned long start, size_t len,
234 return sys_mprotect(start, len, prot);
237 asmlinkage long sys32_pipe(int __user *fd)
242 retval = do_pipe(fds);
245 if (copy_to_user(fd, fds, sizeof(fds)))
251 asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
252 struct sigaction32 __user *oact,
253 unsigned int sigsetsize)
255 struct k_sigaction new_ka, old_ka;
257 compat_sigset_t set32;
259 /* XXX: Don't preclude handling different sized sigset_t's. */
260 if (sigsetsize != sizeof(compat_sigset_t))
264 compat_uptr_t handler, restorer;
266 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
267 __get_user(handler, &act->sa_handler) ||
268 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
269 __get_user(restorer, &act->sa_restorer) ||
270 __copy_from_user(&set32, &act->sa_mask,
271 sizeof(compat_sigset_t)))
273 new_ka.sa.sa_handler = compat_ptr(handler);
274 new_ka.sa.sa_restorer = compat_ptr(restorer);
277 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
278 * than _NSIG_WORDS << 1
280 switch (_NSIG_WORDS) {
281 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
282 | (((long)set32.sig[7]) << 32);
283 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
284 | (((long)set32.sig[5]) << 32);
285 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
286 | (((long)set32.sig[3]) << 32);
287 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
288 | (((long)set32.sig[1]) << 32);
292 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
296 * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
297 * than _NSIG_WORDS << 1
299 switch (_NSIG_WORDS) {
301 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
302 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
304 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
305 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
307 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
308 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
310 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
311 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
313 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
314 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
315 &oact->sa_handler) ||
316 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
317 &oact->sa_restorer) ||
318 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
319 __copy_to_user(&oact->sa_mask, &set32,
320 sizeof(compat_sigset_t)))
327 asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
328 struct old_sigaction32 __user *oact)
330 struct k_sigaction new_ka, old_ka;
334 compat_old_sigset_t mask;
335 compat_uptr_t handler, restorer;
337 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
338 __get_user(handler, &act->sa_handler) ||
339 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
340 __get_user(restorer, &act->sa_restorer) ||
341 __get_user(mask, &act->sa_mask))
344 new_ka.sa.sa_handler = compat_ptr(handler);
345 new_ka.sa.sa_restorer = compat_ptr(restorer);
347 siginitset(&new_ka.sa.sa_mask, mask);
350 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
353 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
354 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
355 &oact->sa_handler) ||
356 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
357 &oact->sa_restorer) ||
358 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
359 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
366 asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
367 compat_sigset_t __user *oset,
368 unsigned int sigsetsize)
373 mm_segment_t old_fs = get_fs();
376 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
378 switch (_NSIG_WORDS) {
379 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
380 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
381 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
382 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
386 ret = sys_rt_sigprocmask(how,
387 set ? (sigset_t __user *)&s : NULL,
388 oset ? (sigset_t __user *)&s : NULL,
394 switch (_NSIG_WORDS) {
395 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
396 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
397 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
398 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
400 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
406 static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i)
410 if (access_ok(VERIFY_READ, i, sizeof(*i))) {
411 err = __get_user(o->tv_sec, &i->tv_sec);
412 err |= __get_user(o->tv_usec, &i->tv_usec);
417 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
421 if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
422 err = __put_user(i->tv_sec, &o->tv_sec);
423 err |= __put_user(i->tv_usec, &o->tv_usec);
428 asmlinkage long sys32_alarm(unsigned int seconds)
430 return alarm_setitimer(seconds);
434 * Translations due to time_t size differences. Which affects all
435 * sorts of things, like timeval and itimerval.
437 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
438 struct timezone __user *tz)
443 do_gettimeofday(&ktv);
444 if (put_tv32(tv, &ktv))
448 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
454 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
455 struct timezone __user *tz)
462 if (get_tv32(&ktv, tv))
464 kts.tv_sec = ktv.tv_sec;
465 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
468 if (copy_from_user(&ktz, tz, sizeof(ktz)))
472 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
475 struct sel_arg_struct {
483 asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
485 struct sel_arg_struct a;
487 if (copy_from_user(&a, arg, sizeof(a)))
489 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
490 compat_ptr(a.exp), compat_ptr(a.tvp));
493 asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
496 return compat_sys_wait4(pid, stat_addr, options, NULL);
499 /* 32-bit timeval and related flotsam. */
501 asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
503 return sys_sysfs(option, arg1, arg2);
506 asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
507 struct compat_timespec __user *interval)
511 mm_segment_t old_fs = get_fs();
514 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
516 if (put_compat_timespec(&t, interval))
521 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
522 compat_size_t sigsetsize)
527 mm_segment_t old_fs = get_fs();
530 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
533 switch (_NSIG_WORDS) {
534 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
535 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
536 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
537 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
539 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
545 asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
546 compat_siginfo_t __user *uinfo)
550 mm_segment_t old_fs = get_fs();
552 if (copy_siginfo_from_user32(&info, uinfo))
555 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
560 /* These are here just in case some old ia32 binary calls it. */
561 asmlinkage long sys32_pause(void)
563 current->state = TASK_INTERRUPTIBLE;
565 return -ERESTARTNOHAND;
569 #ifdef CONFIG_SYSCTL_SYSCALL
574 unsigned int oldlenp;
577 unsigned int __unused[4];
581 asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
583 struct sysctl_ia32 a32;
584 mm_segment_t old_fs = get_fs();
585 void __user *oldvalp, *newvalp;
590 if (copy_from_user(&a32, args32, sizeof(a32)))
594 * We need to pre-validate these because we have to disable
595 * address checking before calling do_sysctl() because of
596 * OLDLEN but we can't run the risk of the user specifying bad
597 * addresses here. Well, since we're dealing with 32 bit
598 * addresses, we KNOW that access_ok() will always succeed, so
599 * this is an expensive NOP, but so what...
601 namep = compat_ptr(a32.name);
602 oldvalp = compat_ptr(a32.oldval);
603 newvalp = compat_ptr(a32.newval);
605 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
606 || !access_ok(VERIFY_WRITE, namep, 0)
607 || !access_ok(VERIFY_WRITE, oldvalp, 0)
608 || !access_ok(VERIFY_WRITE, newvalp, 0))
613 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
614 newvalp, (size_t) a32.newlen);
618 if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
625 /* warning: next two assume little endian */
626 asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
627 u32 poslo, u32 poshi)
629 return sys_pread64(fd, ubuf, count,
630 ((loff_t)AA(poshi) << 32) | AA(poslo));
633 asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
634 u32 poslo, u32 poshi)
636 return sys_pwrite64(fd, ubuf, count,
637 ((loff_t)AA(poshi) << 32) | AA(poslo));
641 asmlinkage long sys32_personality(unsigned long personality)
645 if (personality(current->personality) == PER_LINUX32 &&
646 personality == PER_LINUX)
647 personality = PER_LINUX32;
648 ret = sys_personality(personality);
649 if (ret == PER_LINUX32)
654 asmlinkage long sys32_sendfile(int out_fd, int in_fd,
655 compat_off_t __user *offset, s32 count)
657 mm_segment_t old_fs = get_fs();
661 if (offset && get_user(of, offset))
665 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
669 if (offset && put_user(of, offset))
674 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
675 unsigned long prot, unsigned long flags,
676 unsigned long fd, unsigned long pgoff)
678 struct mm_struct *mm = current->mm;
680 struct file *file = NULL;
682 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
683 if (!(flags & MAP_ANONYMOUS)) {
689 down_write(&mm->mmap_sem);
690 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
691 up_write(&mm->mmap_sem);
698 asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
700 char *arch = "x86_64";
705 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
710 err = __copy_to_user(&name->sysname, &utsname()->sysname,
712 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
713 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
715 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
716 err |= __copy_to_user(&name->release, &utsname()->release,
718 err |= __put_user(0, name->release+__OLD_UTS_LEN);
719 err |= __copy_to_user(&name->version, &utsname()->version,
721 err |= __put_user(0, name->version+__OLD_UTS_LEN);
723 if (personality(current->personality) == PER_LINUX32)
726 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
730 err = err ? -EFAULT : 0;
735 long sys32_uname(struct old_utsname __user *name)
742 err = copy_to_user(name, utsname(), sizeof(*name));
744 if (personality(current->personality) == PER_LINUX32)
745 err |= copy_to_user(&name->machine, "i686", 5);
747 return err ? -EFAULT : 0;
750 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
758 ret = sys_ustat(dev, (struct ustat __user *)&u);
763 if (!access_ok(VERIFY_WRITE, u32p, sizeof(struct ustat32)) ||
764 __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
765 __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
766 __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
767 __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
772 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
773 compat_uptr_t __user *envp, struct pt_regs *regs)
778 filename = getname(name);
779 error = PTR_ERR(filename);
780 if (IS_ERR(filename))
782 error = compat_do_execve(filename, argv, envp, regs);
787 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
788 struct pt_regs *regs)
790 void __user *parent_tid = (void __user *)regs->dx;
791 void __user *child_tid = (void __user *)regs->di;
795 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
799 * Some system calls that need sign extended arguments. This could be
800 * done by a generic wrapper.
802 long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
804 return sys_lseek(fd, offset, whence);
807 long sys32_kill(int pid, int sig)
809 return sys_kill(pid, sig);
812 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
813 __u32 len_low, __u32 len_high, int advice)
815 return sys_fadvise64_64(fd,
816 (((u64)offset_high)<<32) | offset_low,
817 (((u64)len_high)<<32) | len_low,
821 long sys32_vm86_warning(void)
823 struct task_struct *me = current;
824 static char lastcomm[sizeof(me->comm)];
826 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
827 compat_printk(KERN_INFO
828 "%s: vm86 mode not supported on 64 bit kernel\n",
830 strncpy(lastcomm, me->comm, sizeof(lastcomm));
835 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
836 char __user *buf, size_t len)
838 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
841 asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
844 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
847 asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
848 unsigned n_low, unsigned n_hi, int flags)
850 return sys_sync_file_range(fd,
851 ((u64)off_hi << 32) | off_low,
852 ((u64)n_hi << 32) | n_low, flags);
855 asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
856 size_t len, int advice)
858 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
862 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
863 unsigned offset_hi, unsigned len_lo,
866 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
867 ((u64)len_hi << 32) | len_lo);