path: root/arch/x86_64/ia32/sys_ia32.c

/*
 * 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 <linux/fsnotify.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,