1 /* compat.c: 32-bit compatibility syscall for 64-bit systems 2 * 3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/sched.h> 13 #include <linux/syscalls.h> 14 #include <linux/keyctl.h> 15 #include <linux/compat.h> 16 #include "internal.h" 17 18 /*****************************************************************************/ 19 /* 20 * the key control system call, 32-bit compatibility version for 64-bit archs 21 * - this should only be called if the 64-bit arch uses weird pointers in 22 * 32-bit mode or doesn't guarantee that the top 32-bits of the argument 23 * registers on taking a 32-bit syscall are zero 24 * - if you can, you should call sys_keyctl directly 25 */ 26 asmlinkage long compat_sys_keyctl(u32 option, 27 u32 arg2, u32 arg3, u32 arg4, u32 arg5) 28 { 29 switch (option) { 30 case KEYCTL_GET_KEYRING_ID: 31 return keyctl_get_keyring_ID(arg2, arg3); 32 33 case KEYCTL_JOIN_SESSION_KEYRING: 34 return keyctl_join_session_keyring(compat_ptr(arg2)); 35 36 case KEYCTL_UPDATE: 37 return keyctl_update_key(arg2, compat_ptr(arg3), arg4); 38 39 case KEYCTL_REVOKE: 40 return keyctl_revoke_key(arg2); 41 42 case KEYCTL_DESCRIBE: 43 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); 44 45 case KEYCTL_CLEAR: 46 return keyctl_keyring_clear(arg2); 47 48 case KEYCTL_LINK: 49 return keyctl_keyring_link(arg2, arg3); 50 51 case KEYCTL_UNLINK: 52 return keyctl_keyring_unlink(arg2, arg3); 53 54 case KEYCTL_SEARCH: 55 return keyctl_keyring_search(arg2, compat_ptr(arg3), 56 compat_ptr(arg4), arg5); 57 58 case KEYCTL_READ: 59 return keyctl_read_key(arg2, compat_ptr(arg3), arg4); 60 61 case KEYCTL_CHOWN: 62 return keyctl_chown_key(arg2, arg3, arg4); 63 64 case KEYCTL_SETPERM: 65 return keyctl_setperm_key(arg2, arg3); 66 67 case KEYCTL_INSTANTIATE: 68 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, 69 arg5); 70 71 case KEYCTL_NEGATE: 72 return keyctl_negate_key(arg2, arg3, arg4); 73 74 case KEYCTL_SET_REQKEY_KEYRING: 75 return keyctl_set_reqkey_keyring(arg2); 76 77 case KEYCTL_SET_TIMEOUT: 78 return keyctl_set_timeout(arg2, arg3); 79 80 case KEYCTL_ASSUME_AUTHORITY: 81 return keyctl_assume_authority(arg2); 82 83 default: 84 return -EOPNOTSUPP; 85 } 86 87 } /* end compat_sys_keyctl() */ 88