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fetch_struct_flock.c
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/*
* Copyright (c) 2015 Dmitry V. Levin <[email protected]>
* Copyright (c) 2015-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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;
}