/* * Copyright (c) 2015 Dmitry V. Levin * Copyright (c) 2015-2018 The strace developers. * All rights reserved. * * SPDX-License-Identifier: LGPL-2.1-or-later */ #include "defs.h" #include DEF_MPERS_TYPE(struct_flock) #include DEF_MPERS_TYPE(struct_flock64) #include "flock.h" typedef struct_kernel_flock struct_flock; typedef struct_kernel_flock64 struct_flock64; #include MPERS_DEFS #define SIZEOF_MEMBER(type, member) \ sizeof(((type *) NULL)->member) #define FLOCK_MEMBERS_EQ(type, member) \ (SIZEOF_MEMBER(struct_kernel_flock64, member) == SIZEOF_MEMBER(type, member) \ && offsetof(struct_kernel_flock64, member) == offsetof(type, member)) #define FLOCK_STRUCTS_EQ(type) \ (sizeof(struct_kernel_flock64) == sizeof(type) \ && FLOCK_MEMBERS_EQ(type, l_type) \ && FLOCK_MEMBERS_EQ(type, l_whence) \ && FLOCK_MEMBERS_EQ(type, l_start) \ && FLOCK_MEMBERS_EQ(type, l_len) \ && FLOCK_MEMBERS_EQ(type, l_pid)) MPERS_PRINTER_DECL(bool, fetch_struct_flock, struct tcb *const tcp, const kernel_ulong_t addr, void *const p) { struct_kernel_flock64 *pfl = p; struct_flock mfl; if (FLOCK_STRUCTS_EQ(struct_flock)) return !umove_or_printaddr(tcp, addr, pfl); if (umove_or_printaddr(tcp, addr, &mfl)) return false; pfl->l_type = mfl.l_type; pfl->l_whence = mfl.l_whence; pfl->l_start = mfl.l_start; pfl->l_len = mfl.l_len; pfl->l_pid = mfl.l_pid; return true; } MPERS_PRINTER_DECL(bool, fetch_struct_flock64, struct tcb *const tcp, const kernel_ulong_t addr, void *const p) { struct_kernel_flock64 *pfl = p; struct_flock64 mfl; if (FLOCK_STRUCTS_EQ(struct_flock64)) return !umove_or_printaddr(tcp, addr, pfl); if (umove_or_printaddr(tcp, addr, &mfl)) return false; pfl->l_type = mfl.l_type; pfl->l_whence = mfl.l_whence; pfl->l_start = mfl.l_start; pfl->l_len = mfl.l_len; pfl->l_pid = mfl.l_pid; return true; }