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) 2015-2018 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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