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/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2017 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#ifdef HAVE_LINUX_MEMFD_H
# include <linux/memfd.h>
#endif
#include "xlat/memfd_create_flags.h"
#ifndef MFD_HUGE_SHIFT
# define MFD_HUGE_SHIFT 26
#endif
#ifndef MFD_HUGE_MASK
# define MFD_HUGE_MASK 0x3f
#endif
SYS_FUNC(memfd_create)
{
printpathn(tcp, tcp->u_arg[0], 255 - (sizeof("memfd:") - 1));
tprints(", ");
unsigned int flags = tcp->u_arg[1];
if (!flags || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
tprintf("%#x", flags);
if (!flags || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
return RVAL_DECODED | RVAL_FD;
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
tprints(" /* ");
const unsigned int mask = MFD_HUGE_MASK << MFD_HUGE_SHIFT;
const unsigned int hugetlb_value = flags & mask;
flags &= ~mask;
if (flags || !hugetlb_value)
printflags_ex(flags, "MFD_???", XLAT_STYLE_ABBREV,
memfd_create_flags, NULL);
if (hugetlb_value)
tprintf("%s%u<<MFD_HUGE_SHIFT",
flags ? "|" : "",
hugetlb_value >> MFD_HUGE_SHIFT);
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
tprints(" */");
return RVAL_DECODED | RVAL_FD;
}
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