2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2018 The strace developers.
6 * SPDX-License-Identifier: LGPL-2.1-or-later
11 #ifdef HAVE_LINUX_MEMFD_H
12 # include <linux/memfd.h>
15 #include "xlat/memfd_create_flags.h"
17 #ifndef MFD_HUGE_SHIFT
18 # define MFD_HUGE_SHIFT 26
22 # define MFD_HUGE_MASK 0x3f
25 SYS_FUNC(memfd_create)
27 printpathn(tcp, tcp->u_arg[0], 255 - (sizeof("memfd:") - 1));
30 unsigned int flags = tcp->u_arg[1];
32 if (!flags || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
33 tprintf("%#x", flags);
35 if (!flags || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
36 return RVAL_DECODED | RVAL_FD;
38 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
41 const unsigned int mask = MFD_HUGE_MASK << MFD_HUGE_SHIFT;
42 const unsigned int hugetlb_value = flags & mask;
45 if (flags || !hugetlb_value)
46 printflags_ex(flags, "MFD_???", XLAT_STYLE_ABBREV,
47 memfd_create_flags, NULL);
50 tprintf("%s%u<<MFD_HUGE_SHIFT",
52 hugetlb_value >> MFD_HUGE_SHIFT);
54 if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
57 return RVAL_DECODED | RVAL_FD;