/* compat.c: 32-bit compatibility syscall for 64-bit systems * * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/syscalls.h>#include <linux/keyctl.h>#include <linux/compat.h>#include "internal.h" /*****************************************************************************//* * the key control system call, 32-bit compatibility version for 64-bit archs * - this should only be called if the 64-bit arch uses weird pointers in *   32-bit mode or doesn't guarantee that the top 32-bits of the argument *   registers on taking a 32-bit syscall are zero * - if you can, you should call sys_keyctl directly */asmlinkage long compat_sys_keyctl(u32 option,				  u32 arg2, u32 arg3, u32 arg4, u32 arg5){	switch (option) {	case KEYCTL_GET_KEYRING_ID:		return keyctl_get_keyring_ID(arg2, arg3); 	case KEYCTL_JOIN_SESSION_KEYRING:		return keyctl_join_session_keyring(compat_ptr(arg2)); 	case KEYCTL_UPDATE:		return keyctl_update_key(arg2, compat_ptr(arg3), arg4); 	case KEYCTL_REVOKE:		return keyctl_revoke_key(arg2); 	case KEYCTL_DESCRIBE:		return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); 	case KEYCTL_CLEAR:		return keyctl_keyring_clear(arg2); 	case KEYCTL_LINK:		return keyctl_keyring_link(arg2, arg3); 	case KEYCTL_UNLINK:		return keyctl_keyring_unlink(arg2, arg3); 	case KEYCTL_SEARCH:		return keyctl_keyring_search(arg2, compat_ptr(arg3),					     compat_ptr(arg4), arg5); 	case KEYCTL_READ:		return keyctl_read_key(arg2, compat_ptr(arg3), arg4); 	case KEYCTL_CHOWN:		return keyctl_chown_key(arg2, arg3, arg4); 	case KEYCTL_SETPERM:		return keyctl_setperm_key(arg2, arg3); 	case KEYCTL_INSTANTIATE:		return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,					      arg5); 	case KEYCTL_NEGATE:		return keyctl_negate_key(arg2, arg3, arg4); 	case KEYCTL_SET_REQKEY_KEYRING:		return keyctl_set_reqkey_keyring(arg2); 	case KEYCTL_SET_TIMEOUT:		return keyctl_set_timeout(arg2, arg3); 	case KEYCTL_ASSUME_AUTHORITY:		return keyctl_assume_authority(arg2); 	default:		return -EOPNOTSUPP;	} } /* end compat_sys_keyctl() */