1 files changed, 889 insertions, 0 deletions

diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
new file mode 100644
index 000000000000..bee96d614432
--- /dev/null
+++ b/arch/x86/ia32/sys_ia32.c
@@ -0,0 +1,889 @@
+/*
+ * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
+ *             sys_sparc32 
+ *
+ * Copyright (C) 2000           VA Linux Co
+ * Copyright (C) 2000           Don Dugger <n0ano@valinux.com>
+ * Copyright (C) 1999           Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 1997,1998      Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997           David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2000           Hewlett-Packard Co.
+ * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port) 
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * environment. In 2.5 most of this should be moved to a generic directory. 
+ *
+ * This file assumes that there is a hole at the end of user address space.
+ * 
+ * Some of the functions are LE specific currently. These are hopefully all marked.
+ * This should be fixed.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h> 
+#include <linux/file.h> 
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/resource.h>
+#include <linux/times.h>
+#include <linux/utsname.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/mm.h>
+#include <linux/shm.h>
+#include <linux/slab.h>
+#include <linux/uio.h>
+#include <linux/nfs_fs.h>
+#include <linux/quota.h>
+#include <linux/module.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfsd/xdr.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/poll.h>
+#include <linux/personality.h>
+#include <linux/stat.h>
+#include <linux/ipc.h>
+#include <linux/rwsem.h>
+#include <linux/binfmts.h>
+#include <linux/init.h>
+#include <linux/aio_abi.h>
+#include <linux/aio.h>
+#include <linux/compat.h>
+#include <linux/vfs.h>
+#include <linux/ptrace.h>
+#include <linux/highuid.h>
+#include <linux/vmalloc.h>
+#include <linux/fsnotify.h>
+#include <linux/sysctl.h>
+#include <asm/mman.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/atomic.h>
+#include <asm/ldt.h>
+
+#include <net/scm.h>
+#include <net/sock.h>
+#include <asm/ia32.h>
+
+#define AA(__x)         ((unsigned long)(__x))
+
+int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
+{
+        compat_ino_t ino;
+
+        typeof(ubuf->st_uid) uid = 0;
+        typeof(ubuf->st_gid) gid = 0;
+        SET_UID(uid, kbuf->uid);
+        SET_GID(gid, kbuf->gid);
+        if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
+                return -EOVERFLOW;
+        if (kbuf->size >= 0x7fffffff)
+                return -EOVERFLOW;
+        ino = kbuf->ino;
+        if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
+                return -EOVERFLOW;
+        if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
+            __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
+            __put_user (ino, &ubuf->st_ino) ||
+            __put_user (kbuf->mode, &ubuf->st_mode) ||
+            __put_user (kbuf->nlink, &ubuf->st_nlink) ||
+            __put_user (uid, &ubuf->st_uid) ||
+            __put_user (gid, &ubuf->st_gid) ||
+            __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
+            __put_user (kbuf->size, &ubuf->st_size) ||
+            __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
+            __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
+            __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
+            __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
+            __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
+            __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
+            __put_user (kbuf->blksize, &ubuf->st_blksize) ||
+            __put_user (kbuf->blocks, &ubuf->st_blocks))
+                return -EFAULT;
+        return 0;
+}
+
+asmlinkage long
+sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
+}
+
+asmlinkage long
+sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
+}
+
+/* Another set for IA32/LFS -- x86_64 struct stat is different due to 
+   support for 64bit inode numbers. */
+
+static int
+cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
+{
+        typeof(ubuf->st_uid) uid = 0;
+        typeof(ubuf->st_gid) gid = 0;
+        SET_UID(uid, stat->uid);
+        SET_GID(gid, stat->gid);
+        if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
+            __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
+            __put_user (stat->ino, &ubuf->__st_ino) ||
+            __put_user (stat->ino, &ubuf->st_ino) ||
+            __put_user (stat->mode, &ubuf->st_mode) ||
+            __put_user (stat->nlink, &ubuf->st_nlink) ||
+            __put_user (uid, &ubuf->st_uid) ||
+            __put_user (gid, &ubuf->st_gid) ||
+            __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
+            __put_user (stat->size, &ubuf->st_size) ||
+            __put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
+            __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
+            __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
+            __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
+            __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
+            __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
+            __put_user (stat->blksize, &ubuf->st_blksize) ||
+            __put_user (stat->blocks, &ubuf->st_blocks))
+                return -EFAULT;
+        return 0;
+}
+
+asmlinkage long
+sys32_stat64(char __user * filename, struct stat64 __user *statbuf)
+{
+        struct kstat stat;
+        int ret = vfs_stat(filename, &stat);
+        if (!ret)
+                ret = cp_stat64(statbuf, &stat);
+        return ret;
+}
+
+asmlinkage long
+sys32_lstat64(char __user * filename, struct stat64 __user *statbuf)
+{
+        struct kstat stat;
+        int ret = vfs_lstat(filename, &stat);
+        if (!ret)
+                ret = cp_stat64(statbuf, &stat);
+        return ret;
+}
+
+asmlinkage long
+sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
+{
+        struct kstat stat;
+        int ret = vfs_fstat(fd, &stat);
+        if (!ret)
+                ret = cp_stat64(statbuf, &stat);
+        return ret;
+}
+
+asmlinkage long
+sys32_fstatat(unsigned int dfd, char __user *filename,
+              struct stat64 __user* statbuf, int flag)
+{
+        struct kstat stat;
+        int error = -EINVAL;
+
+        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+                goto out;
+
+        if (flag & AT_SYMLINK_NOFOLLOW)
+                error = vfs_lstat_fd(dfd, filename, &stat);
+        else
+                error = vfs_stat_fd(dfd, filename, &stat);
+
+        if (!error)
+                error = cp_stat64(statbuf, &stat);
+
+out:
+        return error;
+}
+
+/*
+ * Linux/i386 didn't use to be able to handle more than
+ * 4 system call parameters, so these system calls used a memory
+ * block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+        unsigned int addr;
+        unsigned int len;
+        unsigned int prot;
+        unsigned int flags;
+        unsigned int fd;
+        unsigned int offset;
+};
+
+asmlinkage long
+sys32_mmap(struct mmap_arg_struct __user *arg)
+{
+        struct mmap_arg_struct a;
+        struct file *file = NULL;
+        unsigned long retval;
+        struct mm_struct *mm ;
+
+        if (copy_from_user(&a, arg, sizeof(a)))
+                return -EFAULT;
+
+        if (a.offset & ~PAGE_MASK)
+                return -EINVAL; 
+
+        if (!(a.flags & MAP_ANONYMOUS)) {
+                file = fget(a.fd);
+                if (!file)
+                        return -EBADF;
+        }
+        
+        mm = current->mm; 
+        down_write(&mm->mmap_sem); 
+        retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
+        if (file)
+                fput(file);
+
+        up_write(&mm->mmap_sem); 
+
+        return retval;
+}
+
+asmlinkage long 
+sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
+{
+        return sys_mprotect(start,len,prot); 
+}
+
+asmlinkage long
+sys32_pipe(int __user *fd)
+{
+        int retval;
+        int fds[2];
+
+        retval = do_pipe(fds);
+        if (retval)
+                goto out;
+        if (copy_to_user(fd, fds, sizeof(fds)))
+                retval = -EFAULT;
+  out:
+        return retval;
+}
+
+asmlinkage long
+sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
+                   struct sigaction32 __user *oact,  unsigned int sigsetsize)
+{
+        struct k_sigaction new_ka, old_ka;
+        int ret;
+        compat_sigset_t set32;
+
+        /* XXX: Don't preclude handling different sized sigset_t's.  */
+        if (sigsetsize != sizeof(compat_sigset_t))
+                return -EINVAL;
+
+        if (act) {
+                compat_uptr_t handler, restorer;
+
+                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+                    __get_user(handler, &act->sa_handler) ||
+                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+                    __get_user(restorer, &act->sa_restorer)||
+                    __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
+                        return -EFAULT;
+                new_ka.sa.sa_handler = compat_ptr(handler);
+                new_ka.sa.sa_restorer = compat_ptr(restorer);
+                /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
+                switch (_NSIG_WORDS) {
+                case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
+                                | (((long)set32.sig[7]) << 32);
+                case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
+                                | (((long)set32.sig[5]) << 32);
+                case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
+                                | (((long)set32.sig[3]) << 32);
+                case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
+                                | (((long)set32.sig[1]) << 32);
+                }
+        }
+
+        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+        if (!ret && oact) {
+                /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
+                switch (_NSIG_WORDS) {
+                case 4:
+                        set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
+                        set32.sig[6] = old_ka.sa.sa_mask.sig[3];
+                case 3:
+                        set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
+                        set32.sig[4] = old_ka.sa.sa_mask.sig[2];
+                case 2:
+                        set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
+                        set32.sig[2] = old_ka.sa.sa_mask.sig[1];
+                case 1:
+                        set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
+                        set32.sig[0] = old_ka.sa.sa_mask.sig[0];
+                }
+                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+                    __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
+                    __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
+                    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+                    __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
+                        return -EFAULT;
+        }
+
+        return ret;
+}
+
+asmlinkage long
+sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
+{
+        struct k_sigaction new_ka, old_ka;
+        int ret;
+
+        if (act) {
+                compat_old_sigset_t mask;
+                compat_uptr_t handler, restorer;
+
+                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+                    __get_user(handler, &act->sa_handler) ||
+                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+                    __get_user(restorer, &act->sa_restorer) ||
+                    __get_user(mask, &act->sa_mask))
+                        return -EFAULT;
+
+                new_ka.sa.sa_handler = compat_ptr(handler);
+                new_ka.sa.sa_restorer = compat_ptr(restorer);
+
+                siginitset(&new_ka.sa.sa_mask, mask);
+        }
+
+        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+        if (!ret && oact) {
+                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+                    __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
+                    __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
+                    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+                    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+                        return -EFAULT;
+        }
+
+        return ret;
+}
+
+asmlinkage long
+sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
+                        compat_sigset_t __user *oset, unsigned int sigsetsize)
+{
+        sigset_t s;
+        compat_sigset_t s32;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+        
+        if (set) {
+                if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
+                        return -EFAULT;
+                switch (_NSIG_WORDS) {
+                case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
+                case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
+                case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
+                case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
+                }
+        }
+        set_fs (KERNEL_DS);
+        ret = sys_rt_sigprocmask(how,
+                                 set ? (sigset_t __user *)&s : NULL,
+                                 oset ? (sigset_t __user *)&s : NULL,
+                                 sigsetsize); 
+        set_fs (old_fs);
+        if (ret) return ret;
+        if (oset) {
+                switch (_NSIG_WORDS) {
+                case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
+                case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
+                case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
+                case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
+                }
+                if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
+                        return -EFAULT;
+        }
+        return 0;
+}
+
+static inline long
+get_tv32(struct timeval *o, struct compat_timeval __user *i)
+{
+        int err = -EFAULT; 
+        if (access_ok(VERIFY_READ, i, sizeof(*i))) { 
+                err = __get_user(o->tv_sec, &i->tv_sec);
+                err |= __get_user(o->tv_usec, &i->tv_usec);
+        }
+        return err; 
+}
+
+static inline long
+put_tv32(struct compat_timeval __user *o, struct timeval *i)
+{
+        int err = -EFAULT;
+        if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { 
+                err = __put_user(i->tv_sec, &o->tv_sec);
+                err |= __put_user(i->tv_usec, &o->tv_usec);
+        } 
+        return err; 
+}
+
+extern unsigned int alarm_setitimer(unsigned int seconds);
+
+asmlinkage long
+sys32_alarm(unsigned int seconds)
+{
+        return alarm_setitimer(seconds);
+}
+
+/* Translations due to time_t size differences.  Which affects all
+   sorts of things, like timeval and itimerval.  */
+
+extern struct timezone sys_tz;
+
+asmlinkage long
+sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
+{
+        if (tv) {
+                struct timeval ktv;
+                do_gettimeofday(&ktv);
+                if (put_tv32(tv, &ktv))
+                        return -EFAULT;
+        }
+        if (tz) {
+                if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+                        return -EFAULT;
+        }
+        return 0;
+}
+
+asmlinkage long
+sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
+{
+        struct timeval ktv;
+        struct timespec kts;
+        struct timezone ktz;
+
+        if (tv) {
+                if (get_tv32(&ktv, tv))
+                        return -EFAULT;
+                kts.tv_sec = ktv.tv_sec;
+                kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
+        }
+        if (tz) {
+                if (copy_from_user(&ktz, tz, sizeof(ktz)))
+                        return -EFAULT;
+        }
+
+        return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
+}
+
+struct sel_arg_struct {
+        unsigned int n;
+        unsigned int inp;
+        unsigned int outp;
+        unsigned int exp;
+        unsigned int tvp;
+};
+
+asmlinkage long
+sys32_old_select(struct sel_arg_struct __user *arg)
+{
+        struct sel_arg_struct a;
+
+        if (copy_from_user(&a, arg, sizeof(a)))
+                return -EFAULT;
+        return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
+                                 compat_ptr(a.exp), compat_ptr(a.tvp));
+}
+
+extern asmlinkage long
+compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
+                 struct compat_rusage *ru);
+
+asmlinkage long
+sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
+{
+        return compat_sys_wait4(pid, stat_addr, options, NULL);
+}
+
+/* 32-bit timeval and related flotsam.  */
+
+asmlinkage long
+sys32_sysfs(int option, u32 arg1, u32 arg2)
+{
+        return sys_sysfs(option, arg1, arg2);
+}
+
+asmlinkage long
+sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
+{
+        struct timespec t;
+        int ret;
+        mm_segment_t old_fs = get_fs ();
+        
+        set_fs (KERNEL_DS);
+        ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
+        set_fs (old_fs);
+        if (put_compat_timespec(&t, interval))
+                return -EFAULT;
+        return ret;
+}
+
+asmlinkage long
+sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
+{
+        sigset_t s;
+        compat_sigset_t s32;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+                
+        set_fs (KERNEL_DS);
+        ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
+        set_fs (old_fs);
+        if (!ret) {
+                switch (_NSIG_WORDS) {
+                case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
+                case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
+                case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
+                case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
+                }
+                if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
+                        return -EFAULT;
+        }
+        return ret;
+}
+
+asmlinkage long
+sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
+{
+        siginfo_t info;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+        
+        if (copy_siginfo_from_user32(&info, uinfo))
+                return -EFAULT;
+        set_fs (KERNEL_DS);
+        ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
+        set_fs (old_fs);
+        return ret;
+}
+
+/* These are here just in case some old ia32 binary calls it. */
+asmlinkage long
+sys32_pause(void)
+{
+        current->state = TASK_INTERRUPTIBLE;
+        schedule();
+        return -ERESTARTNOHAND;
+}
+
+
+#ifdef CONFIG_SYSCTL_SYSCALL
+struct sysctl_ia32 {
+        unsigned int    name;
+        int             nlen;
+        unsigned int    oldval;
+        unsigned int    oldlenp;
+        unsigned int    newval;
+        unsigned int    newlen;
+        unsigned int    __unused[4];
+};
+
+
+asmlinkage long
+sys32_sysctl(struct sysctl_ia32 __user *args32)
+{
+        struct sysctl_ia32 a32;
+        mm_segment_t old_fs = get_fs ();
+        void __user *oldvalp, *newvalp;
+        size_t oldlen;
+        int __user *namep;
+        long ret;
+
+        if (copy_from_user(&a32, args32, sizeof (a32)))
+                return -EFAULT;
+
+        /*
+         * We need to pre-validate these because we have to disable address checking
+         * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
+         * user specifying bad addresses here.  Well, since we're dealing with 32 bit
+         * addresses, we KNOW that access_ok() will always succeed, so this is an
+         * expensive NOP, but so what...
+         */
+        namep = compat_ptr(a32.name);
+        oldvalp = compat_ptr(a32.oldval);
+        newvalp =  compat_ptr(a32.newval);
+
+        if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
+            || !access_ok(VERIFY_WRITE, namep, 0)
+            || !access_ok(VERIFY_WRITE, oldvalp, 0)
+            || !access_ok(VERIFY_WRITE, newvalp, 0))
+                return -EFAULT;
+
+        set_fs(KERNEL_DS);
+        lock_kernel();
+        ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
+                        newvalp, (size_t) a32.newlen);
+        unlock_kernel();
+        set_fs(old_fs);
+
+        if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp)))
+                return -EFAULT;
+
+        return ret;
+}
+#endif
+
+/* warning: next two assume little endian */ 
+asmlinkage long
+sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
+{
+        return sys_pread64(fd, ubuf, count,
+                         ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+asmlinkage long
+sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
+{
+        return sys_pwrite64(fd, ubuf, count,
+                          ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+
+asmlinkage long
+sys32_personality(unsigned long personality)
+{
+        int ret;
+        if (personality(current->personality) == PER_LINUX32 && 
+                personality == PER_LINUX)
+                personality = PER_LINUX32;
+        ret = sys_personality(personality);
+        if (ret == PER_LINUX32)
+                ret = PER_LINUX;
+        return ret;
+}
+
+asmlinkage long
+sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
+{
+        mm_segment_t old_fs = get_fs();
+        int ret;
+        off_t of;
+        
+        if (offset && get_user(of, offset))
+                return -EFAULT;
+                
+        set_fs(KERNEL_DS);
+        ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
+                           count);
+        set_fs(old_fs);
+        
+        if (offset && put_user(of, offset))
+                return -EFAULT;
+                
+        return ret;
+}
+
+asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
+        unsigned long prot, unsigned long flags,
+        unsigned long fd, unsigned long pgoff)
+{
+        struct mm_struct *mm = current->mm;
+        unsigned long error;
+        struct file * file = NULL;
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+        if (!(flags & MAP_ANONYMOUS)) {
+                file = fget(fd);
+                if (!file)
+                        return -EBADF;
+        }
+
+        down_write(&mm->mmap_sem);
+        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+        up_write(&mm->mmap_sem);
+
+        if (file)
+                fput(file);
+        return error;
+}
+
+asmlinkage long sys32_olduname(struct oldold_utsname __user * name)
+{
+        int err;
+
+        if (!name)
+                return -EFAULT;
+        if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
+                return -EFAULT;
+  
+        down_read(&uts_sem);
+
+        err = __copy_to_user(&name->sysname,&utsname()->sysname,
+                                __OLD_UTS_LEN);
+        err |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+        err |= __copy_to_user(&name->nodename,&utsname()->nodename,
+                                __OLD_UTS_LEN);
+        err |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+        err |= __copy_to_user(&name->release,&utsname()->release,
+                                __OLD_UTS_LEN);
+        err |= __put_user(0,name->release+__OLD_UTS_LEN);
+        err |= __copy_to_user(&name->version,&utsname()->version,
+                                __OLD_UTS_LEN);
+        err |= __put_user(0,name->version+__OLD_UTS_LEN);
+        {
+                char *arch = "x86_64";
+                if (personality(current->personality) == PER_LINUX32)
+                        arch = "i686";
+                 
+                err |= __copy_to_user(&name->machine, arch, strlen(arch)+1);
+        }
+
+        up_read(&uts_sem);
+
+        err = err ? -EFAULT : 0;
+
+        return err;
+}
+
+long sys32_uname(struct old_utsname __user * name)
+{
+        int err;
+        if (!name)
+                return -EFAULT;
+        down_read(&uts_sem);
+        err = copy_to_user(name, utsname(), sizeof (*name));
+        up_read(&uts_sem);
+        if (personality(current->personality) == PER_LINUX32) 
+                err |= copy_to_user(&name->machine, "i686", 5);
+        return err?-EFAULT:0;
+}
+
+long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
+{
+        struct ustat u;
+        mm_segment_t seg;
+        int ret;
+        
+        seg = get_fs(); 
+        set_fs(KERNEL_DS); 
+        ret = sys_ustat(dev, (struct ustat __user *)&u);
+        set_fs(seg);
+        if (ret >= 0) { 
+                if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || 
+                    __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
+                    __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
+                    __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
+                    __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
+                        ret = -EFAULT;
+        }
+        return ret;
+} 
+
+asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
+                             compat_uptr_t __user *envp, struct pt_regs *regs)
+{
+        long error;
+        char * filename;
+
+        filename = getname(name);
+        error = PTR_ERR(filename);
+        if (IS_ERR(filename))
+                return error;
+        error = compat_do_execve(filename, argv, envp, regs);
+        if (error == 0) {
+                task_lock(current);
+                current->ptrace &= ~PT_DTRACE;
+                task_unlock(current);
+        }
+        putname(filename);
+        return error;
+}
+
+asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
+                            struct pt_regs *regs)
+{
+        void __user *parent_tid = (void __user *)regs->rdx;
+        void __user *child_tid = (void __user *)regs->rdi;
+        if (!newsp)
+                newsp = regs->rsp;
+        return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+}
+
+/*
+ * Some system calls that need sign extended arguments. This could be done by a generic wrapper.
+ */ 
+
+long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
+{
+        return sys_lseek(fd, offset, whence);
+}
+
+long sys32_kill(int pid, int sig)
+{
+        return sys_kill(pid, sig);
+}
+ 
+long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, 
+                        __u32 len_low, __u32 len_high, int advice)
+{ 
+        return sys_fadvise64_64(fd,
+                               (((u64)offset_high)<<32) | offset_low,
+                               (((u64)len_high)<<32) | len_low,
+                               advice); 
+} 
+
+long sys32_vm86_warning(void)
+{ 
+        struct task_struct *me = current;
+        static char lastcomm[sizeof(me->comm)];
+        if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
+                compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
+                       me->comm);
+                strncpy(lastcomm, me->comm, sizeof(lastcomm));
+        } 
+        return -ENOSYS;
+} 
+
+long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
+                          char __user * buf, size_t len)
+{
+        return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
+}
+
+asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi, size_t count)
+{
+        return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
+}
+
+asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
+                           unsigned n_low, unsigned n_hi,  int flags)
+{
+        return sys_sync_file_range(fd,
+                                   ((u64)off_hi << 32) | off_low,
+                                   ((u64)n_hi << 32) | n_low, flags);
+}
+
+asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi, size_t len,
+                     int advice)
+{
+        return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
+                                len, advice);
+}
+
+asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
+                                unsigned offset_hi, unsigned len_lo,
+                                unsigned len_hi)
+{
+        return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
+                             ((u64)len_hi << 32) | len_lo);
+}