1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * Copyright (c) 2015-2017 The strace developers. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "defs.h" 30 31 #include DEF_MPERS_TYPE(struct_flock) 32 #include DEF_MPERS_TYPE(struct_flock64) 33 34 #include "flock.h" 35 typedef struct_kernel_flock struct_flock; 36 typedef struct_kernel_flock64 struct_flock64; 37 38 #include MPERS_DEFS 39 40 #define SIZEOF_MEMBER(type, member) \ 41 sizeof(((type *) NULL)->member) 42 43 #define FLOCK_MEMBERS_EQ(type, member) \ 44 (SIZEOF_MEMBER(struct_kernel_flock64, member) == SIZEOF_MEMBER(type, member) \ 45 && offsetof(struct_kernel_flock64, member) == offsetof(type, member)) 46 47 #define FLOCK_STRUCTS_EQ(type) \ 48 (sizeof(struct_kernel_flock64) == sizeof(type) \ 49 && FLOCK_MEMBERS_EQ(type, l_type) \ 50 && FLOCK_MEMBERS_EQ(type, l_whence) \ 51 && FLOCK_MEMBERS_EQ(type, l_start) \ 52 && FLOCK_MEMBERS_EQ(type, l_len) \ 53 && FLOCK_MEMBERS_EQ(type, l_pid)) 54 55 MPERS_PRINTER_DECL(bool, fetch_struct_flock, struct tcb *const tcp, 56 const kernel_ulong_t addr, void *const p) 57 { 58 struct_kernel_flock64 *pfl = p; 59 struct_flock mfl; 60 61 if (FLOCK_STRUCTS_EQ(struct_flock)) 62 return !umove_or_printaddr(tcp, addr, pfl); 63 64 if (umove_or_printaddr(tcp, addr, &mfl)) 65 return false; 66 67 pfl->l_type = mfl.l_type; 68 pfl->l_whence = mfl.l_whence; 69 pfl->l_start = mfl.l_start; 70 pfl->l_len = mfl.l_len; 71 pfl->l_pid = mfl.l_pid; 72 return true; 73 } 74 75 MPERS_PRINTER_DECL(bool, fetch_struct_flock64, struct tcb *const tcp, 76 const kernel_ulong_t addr, void *const p) 77 { 78 struct_kernel_flock64 *pfl = p; 79 struct_flock64 mfl; 80 81 if (FLOCK_STRUCTS_EQ(struct_flock64)) 82 return !umove_or_printaddr(tcp, addr, pfl); 83 84 if (umove_or_printaddr(tcp, addr, &mfl)) 85 return false; 86 87 pfl->l_type = mfl.l_type; 88 pfl->l_whence = mfl.l_whence; 89 pfl->l_start = mfl.l_start; 90 pfl->l_len = mfl.l_len; 91 pfl->l_pid = mfl.l_pid; 92 return true; 93 } 94
