Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#include "defs.h"
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#ifdef HAVE_LINUX_MEMFD_H
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# include <linux/memfd.h>
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#endif
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#include "xlat/memfd_create_flags.h"
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#ifndef MFD_HUGE_SHIFT
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# define MFD_HUGE_SHIFT 26
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#endif
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#ifndef MFD_HUGE_MASK
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# define MFD_HUGE_MASK 0x3f
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#endif
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SYS_FUNC(memfd_create)
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{
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printpathn(tcp, tcp->u_arg[0], 255 - (sizeof("memfd:") - 1));
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tprints(", ");
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unsigned int flags = tcp->u_arg[1];
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if (!flags || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
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tprintf("%#x", flags);
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if (!flags || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
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return RVAL_DECODED | RVAL_FD;
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if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
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tprints(" /* ");
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const unsigned int mask = MFD_HUGE_MASK << MFD_HUGE_SHIFT;
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const unsigned int hugetlb_value = flags & mask;
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flags &= ~mask;
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if (flags || !hugetlb_value)
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printflags_ex(flags, "MFD_???", XLAT_STYLE_ABBREV,
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memfd_create_flags, NULL);
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if (hugetlb_value)
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tprintf("%s%u<<MFD_HUGE_SHIFT",
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flags ? "|" : "",
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hugetlb_value >> MFD_HUGE_SHIFT);
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if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
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tprints(" */");
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return RVAL_DECODED | RVAL_FD;
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}
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