1 files changed, 1050 insertions, 0 deletions

diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c
new file mode 100644
index 000000000000..68a9ab06ee7c
--- /dev/null
+++ b/arch/x86_64/ia32/sys_ia32.c
@@ -0,0 +1,1050 @@
+/*
+ * 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/config.h>
+#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/timex.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 <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)
+{
+	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;
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
+	    __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
+	    __put_user (kbuf->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;
+}
+
+/*
+ * 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 ? &s : NULL, oset ? &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 int do_setitimer(int which, struct itimerval *, struct itimerval *);
+
+asmlinkage long
+sys32_alarm(unsigned int seconds)
+{
+	struct itimerval it_new, it_old;
+	unsigned int oldalarm;
+
+	it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
+	it_new.it_value.tv_sec = seconds;
+	it_new.it_value.tv_usec = 0;
+	do_setitimer(ITIMER_REAL, &it_new, &it_old);
+	oldalarm = it_old.it_value.tv_sec;
+	/* ehhh.. We can't return 0 if we have an alarm pending.. */
+	/* And we'd better return too much than too little anyway */
+	if (it_old.it_value.tv_usec)
+		oldalarm++;
+	return oldalarm;
+}
+
+/* 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);
+}
+
+int sys32_ni_syscall(int call)
+{ 
+	struct task_struct *me = current;
+	static char lastcomm[sizeof(me->comm)];
+
+	if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
+		printk(KERN_INFO "IA32 syscall %d from %s not implemented\n",
+		       call, me->comm);
+		strncpy(lastcomm, me->comm, sizeof(lastcomm));
+	} 
+	return -ENOSYS;	       
+} 
+
+/* 32-bit timeval and related flotsam.  */
+
+asmlinkage long
+sys32_sysfs(int option, u32 arg1, u32 arg2)
+{
+	return sys_sysfs(option, arg1, arg2);
+}
+
+struct sysinfo32 {
+        s32 uptime;
+        u32 loads[3];
+        u32 totalram;
+        u32 freeram;
+        u32 sharedram;
+        u32 bufferram;
+        u32 totalswap;
+        u32 freeswap;
+        unsigned short procs;
+	unsigned short pad; 
+        u32 totalhigh;
+        u32 freehigh;
+        u32 mem_unit;
+        char _f[20-2*sizeof(u32)-sizeof(int)];
+};
+
+asmlinkage long
+sys32_sysinfo(struct sysinfo32 __user *info)
+{
+	struct sysinfo s;
+	int ret;
+	mm_segment_t old_fs = get_fs ();
+	int bitcount = 0;
+	
+	set_fs (KERNEL_DS);
+	ret = sys_sysinfo(&s);
+	set_fs (old_fs);
+
+        /* Check to see if any memory value is too large for 32-bit and scale
+	 *  down if needed
+	 */
+	if ((s.totalram >> 32) || (s.totalswap >> 32)) {
+		while (s.mem_unit < PAGE_SIZE) {
+			s.mem_unit <<= 1;
+			bitcount++;
+		}
+		s.totalram >>= bitcount;
+		s.freeram >>= bitcount;
+		s.sharedram >>= bitcount;
+		s.bufferram >>= bitcount;
+		s.totalswap >>= bitcount;
+		s.freeswap >>= bitcount;
+		s.totalhigh >>= bitcount;
+		s.freehigh >>= bitcount;
+	}
+
+	if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
+	    __put_user (s.uptime, &info->uptime) ||
+	    __put_user (s.loads[0], &info->loads[0]) ||
+	    __put_user (s.loads[1], &info->loads[1]) ||
+	    __put_user (s.loads[2], &info->loads[2]) ||
+	    __put_user (s.totalram, &info->totalram) ||
+	    __put_user (s.freeram, &info->freeram) ||
+	    __put_user (s.sharedram, &info->sharedram) ||
+	    __put_user (s.bufferram, &info->bufferram) ||
+	    __put_user (s.totalswap, &info->totalswap) ||
+	    __put_user (s.freeswap, &info->freeswap) ||
+	    __put_user (s.procs, &info->procs) ||
+	    __put_user (s.totalhigh, &info->totalhigh) || 
+	    __put_user (s.freehigh, &info->freehigh) ||
+	    __put_user (s.mem_unit, &info->mem_unit))
+		return -EFAULT;
+	return 0;
+}
+                
+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, &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(&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, &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
+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;
+	extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
+		     void *newval, size_t newlen);
+
+
+	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, &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 ? &of : NULL, count);
+	set_fs(old_fs);
+	
+	if (!ret && offset && put_user(of, offset))
+		return -EFAULT;
+		
+	return ret;
+}
+
+/* Handle adjtimex compatibility. */
+
+struct timex32 {
+	u32 modes;
+	s32 offset, freq, maxerror, esterror;
+	s32 status, constant, precision, tolerance;
+	struct compat_timeval time;
+	s32 tick;
+	s32 ppsfreq, jitter, shift, stabil;
+	s32 jitcnt, calcnt, errcnt, stbcnt;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+};
+
+extern int do_adjtimex(struct timex *);
+
+asmlinkage long
+sys32_adjtimex(struct timex32 __user *utp)
+{
+	struct timex txc;
+	int ret;
+
+	memset(&txc, 0, sizeof(struct timex));
+
+	if (!access_ok(VERIFY_READ, utp, sizeof(struct timex32)) ||
+	   __get_user(txc.modes, &utp->modes) ||
+	   __get_user(txc.offset, &utp->offset) ||
+	   __get_user(txc.freq, &utp->freq) ||
+	   __get_user(txc.maxerror, &utp->maxerror) ||
+	   __get_user(txc.esterror, &utp->esterror) ||
+	   __get_user(txc.status, &utp->status) ||
+	   __get_user(txc.constant, &utp->constant) ||
+	   __get_user(txc.precision, &utp->precision) ||
+	   __get_user(txc.tolerance, &utp->tolerance) ||
+	   __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
+	   __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
+	   __get_user(txc.tick, &utp->tick) ||
+	   __get_user(txc.ppsfreq, &utp->ppsfreq) ||
+	   __get_user(txc.jitter, &utp->jitter) ||
+	   __get_user(txc.shift, &utp->shift) ||
+	   __get_user(txc.stabil, &utp->stabil) ||
+	   __get_user(txc.jitcnt, &utp->jitcnt) ||
+	   __get_user(txc.calcnt, &utp->calcnt) ||
+	   __get_user(txc.errcnt, &utp->errcnt) ||
+	   __get_user(txc.stbcnt, &utp->stbcnt))
+		return -EFAULT;
+
+	ret = do_adjtimex(&txc);
+
+	if (!access_ok(VERIFY_WRITE, utp, sizeof(struct timex32)) ||
+	   __put_user(txc.modes, &utp->modes) ||
+	   __put_user(txc.offset, &utp->offset) ||
+	   __put_user(txc.freq, &utp->freq) ||
+	   __put_user(txc.maxerror, &utp->maxerror) ||
+	   __put_user(txc.esterror, &utp->esterror) ||
+	   __put_user(txc.status, &utp->status) ||
+	   __put_user(txc.constant, &utp->constant) ||
+	   __put_user(txc.precision, &utp->precision) ||
+	   __put_user(txc.tolerance, &utp->tolerance) ||
+	   __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
+	   __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
+	   __put_user(txc.tick, &utp->tick) ||
+	   __put_user(txc.ppsfreq, &utp->ppsfreq) ||
+	   __put_user(txc.jitter, &utp->jitter) ||
+	   __put_user(txc.shift, &utp->shift) ||
+	   __put_user(txc.stabil, &utp->stabil) ||
+	   __put_user(txc.jitcnt, &utp->jitcnt) ||
+	   __put_user(txc.calcnt, &utp->calcnt) ||
+	   __put_user(txc.errcnt, &utp->errcnt) ||
+	   __put_user(txc.stbcnt, &utp->stbcnt))
+		ret = -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 error;
+
+	if (!name)
+		return -EFAULT;
+	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+		return -EFAULT;
+  
+  	down_read(&uts_sem);
+	
+	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
+	 __put_user(0,name->sysname+__OLD_UTS_LEN);
+	 __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+	 __put_user(0,name->nodename+__OLD_UTS_LEN);
+	 __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+	 __put_user(0,name->release+__OLD_UTS_LEN);
+	 __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+	 __put_user(0,name->version+__OLD_UTS_LEN);
+	 { 
+		 char *arch = "x86_64";
+		 if (personality(current->personality) == PER_LINUX32)
+			 arch = "i686";
+		 
+		 __copy_to_user(&name->machine,arch,strlen(arch)+1);
+	 }
+	
+	 up_read(&uts_sem);
+	 
+	 error = error ? -EFAULT : 0;
+	 
+	 return error;
+}
+
+long sys32_uname(struct old_utsname __user * name)
+{
+	int err;
+	if (!name)
+		return -EFAULT;
+	down_read(&uts_sem);
+	err=copy_to_user(name, &system_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,&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);
+}
+ 
+asmlinkage long sys32_open(const char __user * filename, int flags, int mode)
+{
+	char * tmp;
+	int fd, error;
+
+	/* don't force O_LARGEFILE */
+	tmp = getname(filename);
+	fd = PTR_ERR(tmp);
+	if (!IS_ERR(tmp)) {
+		fd = get_unused_fd();
+		if (fd >= 0) {
+			struct file *f = filp_open(tmp, flags, mode);
+			error = PTR_ERR(f);
+			if (IS_ERR(f)) {
+				put_unused_fd(fd); 
+				fd = error;
+			} else
+				fd_install(fd, f);
+		}
+		putname(tmp);
+	}
+	return fd;
+}
+
+extern asmlinkage long
+sys_timer_create(clockid_t which_clock,
+		 struct sigevent __user *timer_event_spec,
+		 timer_t __user * created_timer_id);
+
+long
+sys32_timer_create(u32 clock, struct compat_sigevent __user *se32, timer_t __user *timer_id)
+{
+	struct sigevent __user *p = NULL;
+	if (se32) { 
+		struct sigevent se;
+		p = compat_alloc_user_space(sizeof(struct sigevent));
+		if (get_compat_sigevent(&se, se32) ||
+		    copy_to_user(p, &se, sizeof(se)))
+			return -EFAULT;
+	} 
+	return sys_timer_create(clock, p, timer_id);
+} 
+
+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))) {
+		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);
+}
+
+static int __init ia32_init (void)
+{
+	printk("IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $\n");  
+	return 0;
+}
+
+__initcall(ia32_init);
+
+extern unsigned long ia32_sys_call_table[];
+EXPORT_SYMBOL(ia32_sys_call_table);