[net-next-2.6.git] / arch / x86 / 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/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/smp_lock.h>
#include <linux/mm.h>
#include <linux/uio.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/rwsem.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/highuid.h>
#include <linux/sysctl.h>
#include <linux/slab.h>
#include <asm/mman.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <asm/vgtod.h>
#include <asm/sys_ia32.h>

#define AA(__x)		((unsigned long)(__x))


asmlinkage long sys32_truncate64(const 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(const 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(const 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, const char __user *filename,
			      struct stat64 __user *statbuf, int flag)
{
	struct kstat stat;
	int error;

	error = vfs_fstatat(dfd, filename, &stat, flag);
	if (error)
		return error;
	return cp_stat64(statbuf, &stat);
}

/*
 * 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_struct32 {
	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_struct32 __user *arg)
{
	struct mmap_arg_struct32 a;

	if (copy_from_user(&a, arg, sizeof(a)))
		return -EFAULT;

	if (a.offset & ~PAGE_MASK)
		return -EINVAL;

	return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
			       a.offset>>PAGE_SHIFT);
}

asmlinkage long sys32_mprotect(unsigned long start, size_t len,
			       unsigned long prot)
{
	return sys_mprotect(start, len, prot);
}

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;
}

asmlinkage long sys32_alarm(unsigned int seconds)
{
	return alarm_setitimer(seconds);
}

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;
}

/* 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, const 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_execve(const 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);
	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->dx;
	void __user *child_tid = (void __user *)regs->di;

	if (!newsp)
		newsp = regs->sp;
	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);
}

asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
				    u32 mask_lo, u32 mask_hi,
				    int fd, const char  __user *pathname)
{
	return sys_fanotify_mark(fanotify_fd, flags,
				 ((u64)mask_hi << 32) | mask_lo,
				 fd, pathname);
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
c202f298	3	* sys_sparc32
1da177e4 LT	4	*
	5	* Copyright (C) 2000 VA Linux Co
	6	* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
c202f298 TG	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)
1da177e4 LT	10	* Copyright (C) 2000 Hewlett-Packard Co.
1da177e4 LT	11	* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
c202f298	12	* Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
1da177e4 LT	13	*
1da177e4 LT	14	* These routines maintain argument size conversion between 32bit and 64bit
c202f298	15	* environment. In 2.5 most of this should be moved to a generic directory.
1da177e4 LT	16	*
1da177e4 LT	17	* This file assumes that there is a hole at the end of user address space.
c202f298 TG	18	*
	19	* Some of the functions are LE specific currently. These are
	20	* hopefully all marked. This should be fixed.
1da177e4 LT	21	*/
1da177e4 LT	22
1da177e4 LT	23	#include <linux/kernel.h>
1da177e4 LT	24	#include <linux/sched.h>
c202f298 TG	25	#include <linux/fs.h>
c202f298 TG	26	#include <linux/file.h>
1da177e4 LT	27	#include <linux/signal.h>
1da177e4 LT	28	#include <linux/syscalls.h>
1da177e4 LT	29	#include <linux/times.h>
1da177e4 LT	30	#include <linux/utsname.h>
1da177e4	31	#include <linux/smp_lock.h>
1da177e4	32	#include <linux/mm.h>
1da177e4	33	#include <linux/uio.h>
1da177e4 LT	34	#include <linux/poll.h>
	35	#include <linux/personality.h>
	36	#include <linux/stat.h>
1da177e4	37	#include <linux/rwsem.h>
1da177e4 LT	38	#include <linux/compat.h>
	39	#include <linux/vfs.h>
	40	#include <linux/ptrace.h>
	41	#include <linux/highuid.h>
ddb15ec1	42	#include <linux/sysctl.h>
5a0e3ad6	43	#include <linux/slab.h>
1da177e4 LT	44	#include <asm/mman.h>
	45	#include <asm/types.h>
	46	#include <asm/uaccess.h>
1da177e4	47	#include <asm/atomic.h>
28d23128	48	#include <asm/vgtod.h>
2f06de06	49	#include <asm/sys_ia32.h>
1da177e4 LT	50
	51	#define AA(__x) ((unsigned long)(__x))
	52
1da177e4	53
c7887325	54	asmlinkage long sys32_truncate64(const char __user *filename,
c202f298 TG	55	unsigned long offset_low,
c202f298 TG	56	unsigned long offset_high)
1da177e4 LT	57	{
	58	return sys_truncate(filename, ((loff_t) offset_high << 32) \| offset_low);
	59	}
	60
c202f298 TG	61	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
c202f298 TG	62	unsigned long offset_high)
1da177e4 LT	63	{
	64	return sys_ftruncate(fd, ((loff_t) offset_high << 32) \| offset_low);
	65	}
	66
c202f298 TG	67	/*
	68	* Another set for IA32/LFS -- x86_64 struct stat is different due to
	69	* support for 64bit inode numbers.
	70	*/
	71	static int cp_stat64(struct stat64 __user ubuf, struct kstat stat)
1da177e4 LT	72	{
	73	typeof(ubuf->st_uid) uid = 0;
	74	typeof(ubuf->st_gid) gid = 0;
	75	SET_UID(uid, stat->uid);
	76	SET_GID(gid, stat->gid);
	77	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) \|\|
	78	__put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) \|\|
c202f298 TG	79	__put_user(stat->ino, &ubuf->__st_ino) \|\|
	80	__put_user(stat->ino, &ubuf->st_ino) \|\|
	81	__put_user(stat->mode, &ubuf->st_mode) \|\|
	82	__put_user(stat->nlink, &ubuf->st_nlink) \|\|
	83	__put_user(uid, &ubuf->st_uid) \|\|
	84	__put_user(gid, &ubuf->st_gid) \|\|
	85	__put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) \|\|
	86	__put_user(stat->size, &ubuf->st_size) \|\|
	87	__put_user(stat->atime.tv_sec, &ubuf->st_atime) \|\|
	88	__put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) \|\|
	89	__put_user(stat->mtime.tv_sec, &ubuf->st_mtime) \|\|
	90	__put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) \|\|
	91	__put_user(stat->ctime.tv_sec, &ubuf->st_ctime) \|\|
	92	__put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) \|\|
	93	__put_user(stat->blksize, &ubuf->st_blksize) \|\|
	94	__put_user(stat->blocks, &ubuf->st_blocks))
1da177e4 LT	95	return -EFAULT;
	96	return 0;
	97	}
	98
c7887325	99	asmlinkage long sys32_stat64(const char __user *filename,
c202f298	100	struct stat64 __user *statbuf)
1da177e4 LT	101	{
	102	struct kstat stat;
	103	int ret = vfs_stat(filename, &stat);
c202f298	104
1da177e4 LT	105	if (!ret)
	106	ret = cp_stat64(statbuf, &stat);
	107	return ret;
	108	}
	109
c7887325	110	asmlinkage long sys32_lstat64(const char __user *filename,
c202f298	111	struct stat64 __user *statbuf)
1da177e4 LT	112	{
	113	struct kstat stat;
	114	int ret = vfs_lstat(filename, &stat);
	115	if (!ret)
	116	ret = cp_stat64(statbuf, &stat);
	117	return ret;
	118	}
	119
c202f298	120	asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
1da177e4 LT	121	{
	122	struct kstat stat;
	123	int ret = vfs_fstat(fd, &stat);
	124	if (!ret)
	125	ret = cp_stat64(statbuf, &stat);
	126	return ret;
	127	}
	128
c7887325	129	asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
c202f298	130	struct stat64 __user *statbuf, int flag)
cff2b760 UD	131	{
cff2b760 UD	132	struct kstat stat;
0112fc22	133	int error;
cff2b760	134
0112fc22 OD	135	error = vfs_fstatat(dfd, filename, &stat, flag);
	136	if (error)
	137	return error;
	138	return cp_stat64(statbuf, &stat);
cff2b760 UD	139	}
cff2b760 UD	140
1da177e4 LT	141	/*
	142	* Linux/i386 didn't use to be able to handle more than
	143	* 4 system call parameters, so these system calls used a memory
	144	* block for parameter passing..
	145	*/
	146
a4679373	147	struct mmap_arg_struct32 {
1da177e4 LT	148	unsigned int addr;
	149	unsigned int len;
	150	unsigned int prot;
	151	unsigned int flags;
	152	unsigned int fd;
	153	unsigned int offset;
	154	};
	155
a4679373	156	asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
1da177e4	157	{
a4679373	158	struct mmap_arg_struct32 a;
1da177e4 LT	159
	160	if (copy_from_user(&a, arg, sizeof(a)))
	161	return -EFAULT;
	162
	163	if (a.offset & ~PAGE_MASK)
c202f298	164	return -EINVAL;
1da177e4	165
f8b72560	166	return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
c202f298	167	a.offset>>PAGE_SHIFT);
1da177e4 LT	168	}
1da177e4 LT	169
c202f298 TG	170	asmlinkage long sys32_mprotect(unsigned long start, size_t len,
c202f298 TG	171	unsigned long prot)
1da177e4	172	{
c202f298	173	return sys_mprotect(start, len, prot);
1da177e4 LT	174	}
1da177e4 LT	175
c202f298 TG	176	asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
	177	struct sigaction32 __user *oact,
	178	unsigned int sigsetsize)
1da177e4 LT	179	{
	180	struct k_sigaction new_ka, old_ka;
	181	int ret;
	182	compat_sigset_t set32;
	183
	184	/* XXX: Don't preclude handling different sized sigset_t's. */
	185	if (sigsetsize != sizeof(compat_sigset_t))
	186	return -EINVAL;
	187
	188	if (act) {
	189	compat_uptr_t handler, restorer;
	190
	191	if (!access_ok(VERIFY_READ, act, sizeof(*act)) \|\|
	192	__get_user(handler, &act->sa_handler) \|\|
	193	__get_user(new_ka.sa.sa_flags, &act->sa_flags) \|\|
c202f298 TG	194	__get_user(restorer, &act->sa_restorer) \|\|
	195	__copy_from_user(&set32, &act->sa_mask,
	196	sizeof(compat_sigset_t)))
1da177e4 LT	197	return -EFAULT;
	198	new_ka.sa.sa_handler = compat_ptr(handler);
	199	new_ka.sa.sa_restorer = compat_ptr(restorer);
c202f298 TG	200
	201	/*
	202	* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
	203	* than _NSIG_WORDS << 1
	204	*/
1da177e4 LT	205	switch (_NSIG_WORDS) {
	206	case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
	207	\| (((long)set32.sig[7]) << 32);
	208	case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
	209	\| (((long)set32.sig[5]) << 32);
	210	case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
	211	\| (((long)set32.sig[3]) << 32);
	212	case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
	213	\| (((long)set32.sig[1]) << 32);
	214	}
	215	}
	216
	217	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	218
	219	if (!ret && oact) {
c202f298 TG	220	/*
	221	* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
	222	* than _NSIG_WORDS << 1
	223	*/
1da177e4 LT	224	switch (_NSIG_WORDS) {
	225	case 4:
	226	set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
	227	set32.sig[6] = old_ka.sa.sa_mask.sig[3];
	228	case 3:
	229	set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
	230	set32.sig[4] = old_ka.sa.sa_mask.sig[2];
	231	case 2:
	232	set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
	233	set32.sig[2] = old_ka.sa.sa_mask.sig[1];
	234	case 1:
	235	set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
	236	set32.sig[0] = old_ka.sa.sa_mask.sig[0];
	237	}
	238	if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) \|\|
c202f298 TG	239	__put_user(ptr_to_compat(old_ka.sa.sa_handler),
	240	&oact->sa_handler) \|\|
	241	__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
	242	&oact->sa_restorer) \|\|
1da177e4	243	__put_user(old_ka.sa.sa_flags, &oact->sa_flags) \|\|
c202f298 TG	244	__copy_to_user(&oact->sa_mask, &set32,
c202f298 TG	245	sizeof(compat_sigset_t)))
1da177e4 LT	246	return -EFAULT;
	247	}
	248
	249	return ret;
	250	}
	251
c202f298 TG	252	asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
c202f298 TG	253	struct old_sigaction32 __user *oact)
1da177e4	254	{
c202f298 TG	255	struct k_sigaction new_ka, old_ka;
c202f298 TG	256	int ret;
1da177e4	257
c202f298	258	if (act) {
1da177e4 LT	259	compat_old_sigset_t mask;
	260	compat_uptr_t handler, restorer;
	261
	262	if (!access_ok(VERIFY_READ, act, sizeof(*act)) \|\|
	263	__get_user(handler, &act->sa_handler) \|\|
	264	__get_user(new_ka.sa.sa_flags, &act->sa_flags) \|\|
	265	__get_user(restorer, &act->sa_restorer) \|\|
	266	__get_user(mask, &act->sa_mask))
	267	return -EFAULT;
	268
	269	new_ka.sa.sa_handler = compat_ptr(handler);
	270	new_ka.sa.sa_restorer = compat_ptr(restorer);
	271
	272	siginitset(&new_ka.sa.sa_mask, mask);
c202f298	273	}
1da177e4	274
c202f298	275	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1da177e4 LT	276
	277	if (!ret && oact) {
	278	if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) \|\|
c202f298 TG	279	__put_user(ptr_to_compat(old_ka.sa.sa_handler),
	280	&oact->sa_handler) \|\|
	281	__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
	282	&oact->sa_restorer) \|\|
1da177e4 LT	283	__put_user(old_ka.sa.sa_flags, &oact->sa_flags) \|\|
	284	__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
	285	return -EFAULT;
c202f298	286	}
1da177e4 LT	287
	288	return ret;
	289	}
	290
c202f298 TG	291	asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
	292	compat_sigset_t __user *oset,
	293	unsigned int sigsetsize)
1da177e4 LT	294	{
	295	sigset_t s;
	296	compat_sigset_t s32;
	297	int ret;
	298	mm_segment_t old_fs = get_fs();
c202f298	299
1da177e4	300	if (set) {
c202f298	301	if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
1da177e4 LT	302	return -EFAULT;
	303	switch (_NSIG_WORDS) {
	304	case 4: s.sig[3] = s32.sig[6] \| (((long)s32.sig[7]) << 32);
	305	case 3: s.sig[2] = s32.sig[4] \| (((long)s32.sig[5]) << 32);
	306	case 2: s.sig[1] = s32.sig[2] \| (((long)s32.sig[3]) << 32);
	307	case 1: s.sig[0] = s32.sig[0] \| (((long)s32.sig[1]) << 32);
	308	}
	309	}
c202f298	310	set_fs(KERNEL_DS);
ddb15ec1 AK	311	ret = sys_rt_sigprocmask(how,
	312	set ? (sigset_t __user *)&s : NULL,
	313	oset ? (sigset_t __user *)&s : NULL,
c202f298 TG	314	sigsetsize);
	315	set_fs(old_fs);
	316	if (ret)
	317	return ret;
1da177e4 LT	318	if (oset) {
	319	switch (_NSIG_WORDS) {
	320	case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
	321	case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
	322	case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
	323	case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
	324	}
c202f298	325	if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
1da177e4 LT	326	return -EFAULT;
	327	}
	328	return 0;
	329	}
	330
c202f298	331	asmlinkage long sys32_alarm(unsigned int seconds)
1da177e4	332	{
c08b8a49	333	return alarm_setitimer(seconds);
1da177e4 LT	334	}
1da177e4 LT	335
c202f298 TG	336	asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
c202f298 TG	337	int options)
1da177e4 LT	338	{
	339	return compat_sys_wait4(pid, stat_addr, options, NULL);
	340	}
	341
1da177e4 LT	342	/* 32-bit timeval and related flotsam. */
1da177e4 LT	343
c202f298	344	asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
1da177e4 LT	345	{
	346	return sys_sysfs(option, arg1, arg2);
	347	}
	348
c202f298 TG	349	asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
c202f298 TG	350	struct compat_timespec __user *interval)
1da177e4 LT	351	{
	352	struct timespec t;
	353	int ret;
c202f298 TG	354	mm_segment_t old_fs = get_fs();
	355
	356	set_fs(KERNEL_DS);
ddb15ec1	357	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
c202f298	358	set_fs(old_fs);
1da177e4 LT	359	if (put_compat_timespec(&t, interval))
	360	return -EFAULT;
	361	return ret;
	362	}
	363
c202f298 TG	364	asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
c202f298 TG	365	compat_size_t sigsetsize)
1da177e4 LT	366	{
	367	sigset_t s;
	368	compat_sigset_t s32;
	369	int ret;
	370	mm_segment_t old_fs = get_fs();
c202f298 TG	371
c202f298 TG	372	set_fs(KERNEL_DS);
ddb15ec1	373	ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
c202f298	374	set_fs(old_fs);
1da177e4 LT	375	if (!ret) {
	376	switch (_NSIG_WORDS) {
	377	case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
	378	case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
	379	case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
	380	case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
	381	}
c202f298	382	if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
1da177e4 LT	383	return -EFAULT;
	384	}
	385	return ret;
	386	}
	387
c202f298 TG	388	asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
c202f298 TG	389	compat_siginfo_t __user *uinfo)
1da177e4 LT	390	{
	391	siginfo_t info;
	392	int ret;
	393	mm_segment_t old_fs = get_fs();
c202f298	394
1da177e4 LT	395	if (copy_siginfo_from_user32(&info, uinfo))
1da177e4 LT	396	return -EFAULT;
c202f298	397	set_fs(KERNEL_DS);
ddb15ec1	398	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
c202f298	399	set_fs(old_fs);
1da177e4 LT	400	return ret;
	401	}
	402
c202f298 TG	403	/* warning: next two assume little endian */
	404	asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
	405	u32 poslo, u32 poshi)
1da177e4 LT	406	{
	407	return sys_pread64(fd, ubuf, count,
	408	((loff_t)AA(poshi) << 32) \| AA(poslo));
	409	}
	410
c7887325 DH	411	asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
c7887325 DH	412	u32 count, u32 poslo, u32 poshi)
1da177e4 LT	413	{
	414	return sys_pwrite64(fd, ubuf, count,
	415	((loff_t)AA(poshi) << 32) \| AA(poslo));
	416	}
	417
	418
c202f298	419	asmlinkage long sys32_personality(unsigned long personality)
1da177e4 LT	420	{
1da177e4 LT	421	int ret;
c202f298 TG	422
c202f298 TG	423	if (personality(current->personality) == PER_LINUX32 &&
1da177e4 LT	424	personality == PER_LINUX)
	425	personality = PER_LINUX32;
	426	ret = sys_personality(personality);
	427	if (ret == PER_LINUX32)
	428	ret = PER_LINUX;
	429	return ret;
	430	}
	431
c202f298 TG	432	asmlinkage long sys32_sendfile(int out_fd, int in_fd,
c202f298 TG	433	compat_off_t __user *offset, s32 count)
1da177e4 LT	434	{
	435	mm_segment_t old_fs = get_fs();
	436	int ret;
	437	off_t of;
c202f298	438
1da177e4 LT	439	if (offset && get_user(of, offset))
1da177e4 LT	440	return -EFAULT;
c202f298	441
1da177e4	442	set_fs(KERNEL_DS);
ddb15ec1 AK	443	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
ddb15ec1 AK	444	count);
1da177e4	445	set_fs(old_fs);
c202f298	446
83b942bd	447	if (offset && put_user(of, offset))
1da177e4	448	return -EFAULT;
1da177e4 LT	449	return ret;
	450	}
	451
c7887325	452	asmlinkage long sys32_execve(const char __user name, compat_uptr_t __user argv,
1da177e4 LT	453	compat_uptr_t __user envp, struct pt_regs regs)
	454	{
	455	long error;
c202f298	456	char *filename;
1da177e4 LT	457
	458	filename = getname(name);
	459	error = PTR_ERR(filename);
	460	if (IS_ERR(filename))
	461	return error;
	462	error = compat_do_execve(filename, argv, envp, regs);
1da177e4 LT	463	putname(filename);
	464	return error;
	465	}
	466
	467	asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
	468	struct pt_regs *regs)
	469	{
65ea5b03 PA	470	void __user parent_tid = (void __user )regs->dx;
65ea5b03 PA	471	void __user child_tid = (void __user )regs->di;
c202f298	472
1da177e4	473	if (!newsp)
65ea5b03	474	newsp = regs->sp;
c202f298	475	return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
1da177e4 LT	476	}
	477
	478	/*
c202f298 TG	479	* Some system calls that need sign extended arguments. This could be
	480	* done by a generic wrapper.
	481	*/
	482	long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
1da177e4 LT	483	{
	484	return sys_lseek(fd, offset, whence);
	485	}
	486
	487	long sys32_kill(int pid, int sig)
	488	{
	489	return sys_kill(pid, sig);
	490	}
c202f298 TG	491
c202f298 TG	492	long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
1da177e4	493	__u32 len_low, __u32 len_high, int advice)
c202f298	494	{
1da177e4 LT	495	return sys_fadvise64_64(fd,
	496	(((u64)offset_high)<<32) \| offset_low,
	497	(((u64)len_high)<<32) \| len_low,
c202f298 TG	498	advice);
c202f298 TG	499	}
1da177e4 LT	500
1da177e4 LT	501	long sys32_vm86_warning(void)
c202f298	502	{
1da177e4 LT	503	struct task_struct *me = current;
1da177e4 LT	504	static char lastcomm[sizeof(me->comm)];
c202f298	505
1da177e4	506	if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
c202f298 TG	507	compat_printk(KERN_INFO
	508	"%s: vm86 mode not supported on 64 bit kernel\n",
	509	me->comm);
1da177e4	510	strncpy(lastcomm, me->comm, sizeof(lastcomm));
c202f298	511	}
1da177e4	512	return -ENOSYS;
c202f298	513	}
1da177e4 LT	514
1da177e4 LT	515	long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
c202f298	516	char __user *buf, size_t len)
1da177e4 LT	517	{
	518	return sys_lookup_dcookie(((u64)addr_high << 32) \| addr_low, buf, len);
	519	}
	520
c202f298 TG	521	asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
c202f298 TG	522	size_t count)
e412ac49 AK	523	{
	524	return sys_readahead(fd, ((u64)off_hi << 32) \| off_lo, count);
	525	}
	526
	527	asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
c202f298	528	unsigned n_low, unsigned n_hi, int flags)
e412ac49 AK	529	{
	530	return sys_sync_file_range(fd,
	531	((u64)off_hi << 32) \| off_low,
	532	((u64)n_hi << 32) \| n_low, flags);
	533	}
	534
c202f298 TG	535	asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
c202f298 TG	536	size_t len, int advice)
e412ac49 AK	537	{
	538	return sys_fadvise64_64(fd, ((u64)offset_hi << 32) \| offset_lo,
	539	len, advice);
	540	}
97ac7350 AA	541
	542	asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
	543	unsigned offset_hi, unsigned len_lo,
	544	unsigned len_hi)
	545	{
	546	return sys_fallocate(fd, mode, ((u64)offset_hi << 32) \| offset_lo,
	547	((u64)len_hi << 32) \| len_lo);
	548	}
bbaa4168 EP	549
	550	asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
	551	u32 mask_lo, u32 mask_hi,
	552	int fd, const char __user *pathname)
	553	{
	554	return sys_fanotify_mark(fanotify_fd, flags,
	555	((u64)mask_hi << 32) \| mask_lo,
	556	fd, pathname);
	557	}