[mirror_ubuntu-bionic-kernel.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/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 <linux/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, from_kuid_munged(current_user_ns(), stat->uid));
	SET_GID(gid, from_kgid_munged(current_user_ns(), 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_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/mm.h>
1da177e4	32	#include <linux/uio.h>
1da177e4 LT	33	#include <linux/poll.h>
	34	#include <linux/personality.h>
	35	#include <linux/stat.h>
1da177e4	36	#include <linux/rwsem.h>
1da177e4 LT	37	#include <linux/compat.h>
	38	#include <linux/vfs.h>
	39	#include <linux/ptrace.h>
	40	#include <linux/highuid.h>
ddb15ec1	41	#include <linux/sysctl.h>
5a0e3ad6	42	#include <linux/slab.h>
1da177e4 LT	43	#include <asm/mman.h>
	44	#include <asm/types.h>
	45	#include <asm/uaccess.h>
60063497	46	#include <linux/atomic.h>
28d23128	47	#include <asm/vgtod.h>
2f06de06	48	#include <asm/sys_ia32.h>
1da177e4 LT	49
	50	#define AA(__x) ((unsigned long)(__x))
	51
1da177e4	52
c7887325	53	asmlinkage long sys32_truncate64(const char __user *filename,
c202f298 TG	54	unsigned long offset_low,
c202f298 TG	55	unsigned long offset_high)
1da177e4 LT	56	{
	57	return sys_truncate(filename, ((loff_t) offset_high << 32) \| offset_low);
	58	}
	59
c202f298 TG	60	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
c202f298 TG	61	unsigned long offset_high)
1da177e4 LT	62	{
	63	return sys_ftruncate(fd, ((loff_t) offset_high << 32) \| offset_low);
	64	}
	65
c202f298 TG	66	/*
	67	* Another set for IA32/LFS -- x86_64 struct stat is different due to
	68	* support for 64bit inode numbers.
	69	*/
	70	static int cp_stat64(struct stat64 __user ubuf, struct kstat stat)
1da177e4 LT	71	{
	72	typeof(ubuf->st_uid) uid = 0;
	73	typeof(ubuf->st_gid) gid = 0;
a7c1938e EB	74	SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
a7c1938e EB	75	SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
1da177e4 LT	76	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) \|\|
1da177e4 LT	77	__put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) \|\|
c202f298 TG	78	__put_user(stat->ino, &ubuf->__st_ino) \|\|
	79	__put_user(stat->ino, &ubuf->st_ino) \|\|
	80	__put_user(stat->mode, &ubuf->st_mode) \|\|
	81	__put_user(stat->nlink, &ubuf->st_nlink) \|\|
	82	__put_user(uid, &ubuf->st_uid) \|\|
	83	__put_user(gid, &ubuf->st_gid) \|\|
	84	__put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) \|\|
	85	__put_user(stat->size, &ubuf->st_size) \|\|
	86	__put_user(stat->atime.tv_sec, &ubuf->st_atime) \|\|
	87	__put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) \|\|
	88	__put_user(stat->mtime.tv_sec, &ubuf->st_mtime) \|\|
	89	__put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) \|\|
	90	__put_user(stat->ctime.tv_sec, &ubuf->st_ctime) \|\|
	91	__put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) \|\|
	92	__put_user(stat->blksize, &ubuf->st_blksize) \|\|
	93	__put_user(stat->blocks, &ubuf->st_blocks))
1da177e4 LT	94	return -EFAULT;
	95	return 0;
	96	}
	97
c7887325	98	asmlinkage long sys32_stat64(const char __user *filename,
c202f298	99	struct stat64 __user *statbuf)
1da177e4 LT	100	{
	101	struct kstat stat;
	102	int ret = vfs_stat(filename, &stat);
c202f298	103
1da177e4 LT	104	if (!ret)
	105	ret = cp_stat64(statbuf, &stat);
	106	return ret;
	107	}
	108
c7887325	109	asmlinkage long sys32_lstat64(const char __user *filename,
c202f298	110	struct stat64 __user *statbuf)
1da177e4 LT	111	{
	112	struct kstat stat;
	113	int ret = vfs_lstat(filename, &stat);
	114	if (!ret)
	115	ret = cp_stat64(statbuf, &stat);
	116	return ret;
	117	}
	118
c202f298	119	asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
1da177e4 LT	120	{
	121	struct kstat stat;
	122	int ret = vfs_fstat(fd, &stat);
	123	if (!ret)
	124	ret = cp_stat64(statbuf, &stat);
	125	return ret;
	126	}
	127
c7887325	128	asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
c202f298	129	struct stat64 __user *statbuf, int flag)
cff2b760 UD	130	{
cff2b760 UD	131	struct kstat stat;
0112fc22	132	int error;
cff2b760	133
0112fc22 OD	134	error = vfs_fstatat(dfd, filename, &stat, flag);
	135	if (error)
	136	return error;
	137	return cp_stat64(statbuf, &stat);
cff2b760 UD	138	}
cff2b760 UD	139
1da177e4 LT	140	/*
	141	* Linux/i386 didn't use to be able to handle more than
	142	* 4 system call parameters, so these system calls used a memory
	143	* block for parameter passing..
	144	*/
	145
a4679373	146	struct mmap_arg_struct32 {
1da177e4 LT	147	unsigned int addr;
	148	unsigned int len;
	149	unsigned int prot;
	150	unsigned int flags;
	151	unsigned int fd;
	152	unsigned int offset;
	153	};
	154
a4679373	155	asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
1da177e4	156	{
a4679373	157	struct mmap_arg_struct32 a;
1da177e4 LT	158
	159	if (copy_from_user(&a, arg, sizeof(a)))
	160	return -EFAULT;
	161
	162	if (a.offset & ~PAGE_MASK)
c202f298	163	return -EINVAL;
1da177e4	164
f8b72560	165	return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
c202f298	166	a.offset>>PAGE_SHIFT);
1da177e4 LT	167	}
1da177e4 LT	168
c202f298 TG	169	asmlinkage long sys32_mprotect(unsigned long start, size_t len,
c202f298 TG	170	unsigned long prot)
1da177e4	171	{
c202f298	172	return sys_mprotect(start, len, prot);
1da177e4 LT	173	}
1da177e4 LT	174
c202f298 TG	175	asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
	176	struct sigaction32 __user *oact,
	177	unsigned int sigsetsize)
1da177e4 LT	178	{
	179	struct k_sigaction new_ka, old_ka;
	180	int ret;
	181	compat_sigset_t set32;
	182
	183	/* XXX: Don't preclude handling different sized sigset_t's. */
	184	if (sigsetsize != sizeof(compat_sigset_t))
	185	return -EINVAL;
	186
	187	if (act) {
	188	compat_uptr_t handler, restorer;
	189
	190	if (!access_ok(VERIFY_READ, act, sizeof(*act)) \|\|
	191	__get_user(handler, &act->sa_handler) \|\|
	192	__get_user(new_ka.sa.sa_flags, &act->sa_flags) \|\|
c202f298 TG	193	__get_user(restorer, &act->sa_restorer) \|\|
	194	__copy_from_user(&set32, &act->sa_mask,
	195	sizeof(compat_sigset_t)))
1da177e4 LT	196	return -EFAULT;
	197	new_ka.sa.sa_handler = compat_ptr(handler);
	198	new_ka.sa.sa_restorer = compat_ptr(restorer);
c202f298 TG	199
	200	/*
	201	* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
	202	* than _NSIG_WORDS << 1
	203	*/
1da177e4 LT	204	switch (_NSIG_WORDS) {
	205	case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
	206	\| (((long)set32.sig[7]) << 32);
	207	case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
	208	\| (((long)set32.sig[5]) << 32);
	209	case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
	210	\| (((long)set32.sig[3]) << 32);
	211	case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
	212	\| (((long)set32.sig[1]) << 32);
	213	}
	214	}
	215
	216	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	217
	218	if (!ret && oact) {
c202f298 TG	219	/*
	220	* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
	221	* than _NSIG_WORDS << 1
	222	*/
1da177e4 LT	223	switch (_NSIG_WORDS) {
	224	case 4:
	225	set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
	226	set32.sig[6] = old_ka.sa.sa_mask.sig[3];
	227	case 3:
	228	set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
	229	set32.sig[4] = old_ka.sa.sa_mask.sig[2];
	230	case 2:
	231	set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
	232	set32.sig[2] = old_ka.sa.sa_mask.sig[1];
	233	case 1:
	234	set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
	235	set32.sig[0] = old_ka.sa.sa_mask.sig[0];
	236	}
	237	if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) \|\|
c202f298 TG	238	__put_user(ptr_to_compat(old_ka.sa.sa_handler),
	239	&oact->sa_handler) \|\|
	240	__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
	241	&oact->sa_restorer) \|\|
1da177e4	242	__put_user(old_ka.sa.sa_flags, &oact->sa_flags) \|\|
c202f298 TG	243	__copy_to_user(&oact->sa_mask, &set32,
c202f298 TG	244	sizeof(compat_sigset_t)))
1da177e4 LT	245	return -EFAULT;
	246	}
	247
	248	return ret;
	249	}
	250
c202f298 TG	251	asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
c202f298 TG	252	struct old_sigaction32 __user *oact)
1da177e4	253	{
c202f298 TG	254	struct k_sigaction new_ka, old_ka;
c202f298 TG	255	int ret;
1da177e4	256
c202f298	257	if (act) {
1da177e4 LT	258	compat_old_sigset_t mask;
	259	compat_uptr_t handler, restorer;
	260
	261	if (!access_ok(VERIFY_READ, act, sizeof(*act)) \|\|
	262	__get_user(handler, &act->sa_handler) \|\|
	263	__get_user(new_ka.sa.sa_flags, &act->sa_flags) \|\|
	264	__get_user(restorer, &act->sa_restorer) \|\|
	265	__get_user(mask, &act->sa_mask))
	266	return -EFAULT;
	267
	268	new_ka.sa.sa_handler = compat_ptr(handler);
	269	new_ka.sa.sa_restorer = compat_ptr(restorer);
	270
	271	siginitset(&new_ka.sa.sa_mask, mask);
c202f298	272	}
1da177e4	273
c202f298	274	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
1da177e4 LT	275
	276	if (!ret && oact) {
	277	if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) \|\|
c202f298 TG	278	__put_user(ptr_to_compat(old_ka.sa.sa_handler),
	279	&oact->sa_handler) \|\|
	280	__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
	281	&oact->sa_restorer) \|\|
1da177e4 LT	282	__put_user(old_ka.sa.sa_flags, &oact->sa_flags) \|\|
	283	__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
	284	return -EFAULT;
c202f298	285	}
1da177e4 LT	286
	287	return ret;
	288	}
	289
c202f298	290	asmlinkage long sys32_alarm(unsigned int seconds)
1da177e4	291	{
c08b8a49	292	return alarm_setitimer(seconds);
1da177e4 LT	293	}
1da177e4 LT	294
c202f298 TG	295	asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
c202f298 TG	296	int options)
1da177e4 LT	297	{
	298	return compat_sys_wait4(pid, stat_addr, options, NULL);
	299	}
	300
1da177e4 LT	301	/* 32-bit timeval and related flotsam. */
1da177e4 LT	302
c202f298	303	asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
1da177e4 LT	304	{
	305	return sys_sysfs(option, arg1, arg2);
	306	}
	307
c202f298 TG	308	asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
c202f298 TG	309	struct compat_timespec __user *interval)
1da177e4 LT	310	{
	311	struct timespec t;
	312	int ret;
c202f298 TG	313	mm_segment_t old_fs = get_fs();
	314
	315	set_fs(KERNEL_DS);
ddb15ec1	316	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
c202f298	317	set_fs(old_fs);
1da177e4 LT	318	if (put_compat_timespec(&t, interval))
	319	return -EFAULT;
	320	return ret;
	321	}
	322
c202f298 TG	323	asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
c202f298 TG	324	compat_size_t sigsetsize)
1da177e4 LT	325	{
	326	sigset_t s;
	327	compat_sigset_t s32;
	328	int ret;
	329	mm_segment_t old_fs = get_fs();
c202f298 TG	330
c202f298 TG	331	set_fs(KERNEL_DS);
ddb15ec1	332	ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
c202f298	333	set_fs(old_fs);
1da177e4 LT	334	if (!ret) {
	335	switch (_NSIG_WORDS) {
	336	case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
	337	case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
	338	case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
	339	case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
	340	}
c202f298	341	if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
1da177e4 LT	342	return -EFAULT;
	343	}
	344	return ret;
	345	}
	346
c202f298 TG	347	asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
c202f298 TG	348	compat_siginfo_t __user *uinfo)
1da177e4 LT	349	{
	350	siginfo_t info;
	351	int ret;
	352	mm_segment_t old_fs = get_fs();
c202f298	353
1da177e4 LT	354	if (copy_siginfo_from_user32(&info, uinfo))
1da177e4 LT	355	return -EFAULT;
c202f298	356	set_fs(KERNEL_DS);
ddb15ec1	357	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
c202f298	358	set_fs(old_fs);
1da177e4 LT	359	return ret;
	360	}
	361
c202f298 TG	362	/* warning: next two assume little endian */
	363	asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
	364	u32 poslo, u32 poshi)
1da177e4 LT	365	{
	366	return sys_pread64(fd, ubuf, count,
	367	((loff_t)AA(poshi) << 32) \| AA(poslo));
	368	}
	369
c7887325 DH	370	asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
c7887325 DH	371	u32 count, u32 poslo, u32 poshi)
1da177e4 LT	372	{
	373	return sys_pwrite64(fd, ubuf, count,
	374	((loff_t)AA(poshi) << 32) \| AA(poslo));
	375	}
	376
	377
c202f298	378	asmlinkage long sys32_personality(unsigned long personality)
1da177e4 LT	379	{
1da177e4 LT	380	int ret;
c202f298 TG	381
c202f298 TG	382	if (personality(current->personality) == PER_LINUX32 &&
1da177e4 LT	383	personality == PER_LINUX)
	384	personality = PER_LINUX32;
	385	ret = sys_personality(personality);
	386	if (ret == PER_LINUX32)
	387	ret = PER_LINUX;
	388	return ret;
	389	}
	390
c202f298 TG	391	asmlinkage long sys32_sendfile(int out_fd, int in_fd,
c202f298 TG	392	compat_off_t __user *offset, s32 count)
1da177e4 LT	393	{
	394	mm_segment_t old_fs = get_fs();
	395	int ret;
	396	off_t of;
c202f298	397
1da177e4 LT	398	if (offset && get_user(of, offset))
1da177e4 LT	399	return -EFAULT;
c202f298	400
1da177e4	401	set_fs(KERNEL_DS);
ddb15ec1 AK	402	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
ddb15ec1 AK	403	count);
1da177e4	404	set_fs(old_fs);
c202f298	405
83b942bd	406	if (offset && put_user(of, offset))
1da177e4	407	return -EFAULT;
1da177e4 LT	408	return ret;
	409	}
	410
c7887325	411	asmlinkage long sys32_execve(const char __user name, compat_uptr_t __user argv,
1da177e4 LT	412	compat_uptr_t __user envp, struct pt_regs regs)
	413	{
	414	long error;
c202f298	415	char *filename;
1da177e4 LT	416
	417	filename = getname(name);
	418	error = PTR_ERR(filename);
	419	if (IS_ERR(filename))
	420	return error;
	421	error = compat_do_execve(filename, argv, envp, regs);
1da177e4 LT	422	putname(filename);
	423	return error;
	424	}
	425
	426	asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
	427	struct pt_regs *regs)
	428	{
65ea5b03 PA	429	void __user parent_tid = (void __user )regs->dx;
65ea5b03 PA	430	void __user child_tid = (void __user )regs->di;
c202f298	431
1da177e4	432	if (!newsp)
65ea5b03	433	newsp = regs->sp;
c202f298	434	return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
1da177e4 LT	435	}
	436
	437	/*
c202f298 TG	438	* Some system calls that need sign extended arguments. This could be
	439	* done by a generic wrapper.
	440	*/
	441	long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
1da177e4 LT	442	{
	443	return sys_lseek(fd, offset, whence);
	444	}
	445
	446	long sys32_kill(int pid, int sig)
	447	{
	448	return sys_kill(pid, sig);
	449	}
c202f298 TG	450
c202f298 TG	451	long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
1da177e4	452	__u32 len_low, __u32 len_high, int advice)
c202f298	453	{
1da177e4 LT	454	return sys_fadvise64_64(fd,
	455	(((u64)offset_high)<<32) \| offset_low,
	456	(((u64)len_high)<<32) \| len_low,
c202f298 TG	457	advice);
c202f298 TG	458	}
1da177e4 LT	459
1da177e4 LT	460	long sys32_vm86_warning(void)
c202f298	461	{
1da177e4 LT	462	struct task_struct *me = current;
1da177e4 LT	463	static char lastcomm[sizeof(me->comm)];
c202f298	464
1da177e4	465	if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
c202f298 TG	466	compat_printk(KERN_INFO
	467	"%s: vm86 mode not supported on 64 bit kernel\n",
	468	me->comm);
1da177e4	469	strncpy(lastcomm, me->comm, sizeof(lastcomm));
c202f298	470	}
1da177e4	471	return -ENOSYS;
c202f298	472	}
1da177e4 LT	473
1da177e4 LT	474	long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
c202f298	475	char __user *buf, size_t len)
1da177e4 LT	476	{
	477	return sys_lookup_dcookie(((u64)addr_high << 32) \| addr_low, buf, len);
	478	}
	479
c202f298 TG	480	asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
c202f298 TG	481	size_t count)
e412ac49 AK	482	{
	483	return sys_readahead(fd, ((u64)off_hi << 32) \| off_lo, count);
	484	}
	485
	486	asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
c202f298	487	unsigned n_low, unsigned n_hi, int flags)
e412ac49 AK	488	{
	489	return sys_sync_file_range(fd,
	490	((u64)off_hi << 32) \| off_low,
	491	((u64)n_hi << 32) \| n_low, flags);
	492	}
	493
c202f298 TG	494	asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
c202f298 TG	495	size_t len, int advice)
e412ac49 AK	496	{
	497	return sys_fadvise64_64(fd, ((u64)offset_hi << 32) \| offset_lo,
	498	len, advice);
	499	}
97ac7350 AA	500
	501	asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
	502	unsigned offset_hi, unsigned len_lo,
	503	unsigned len_hi)
	504	{
	505	return sys_fallocate(fd, mode, ((u64)offset_hi << 32) \| offset_lo,
	506	((u64)len_hi << 32) \| len_lo);
	507	}
bbaa4168 EP	508
	509	asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
	510	u32 mask_lo, u32 mask_hi,
	511	int fd, const char __user *pathname)
	512	{
	513	return sys_fanotify_mark(fanotify_fd, flags,
	514	((u64)mask_hi << 32) \| mask_lo,
	515	fd, pathname);
	516	}