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fetch_struct_flock.c
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fetch_struct_flock.c
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/*
* Copyright (c) 2015 Dmitry V. Levin <[email protected]>
* 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;
}