You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.2 KiB
64 lines
2.2 KiB
/* |
|
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org> |
|
* Copyright (c) 2015-2017 The strace developers. |
|
* All rights reserved. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* 3. The name of the author may not be used to endorse or promote products |
|
* derived from this software without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#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]; |
|
const unsigned int mask = MFD_HUGE_MASK << MFD_HUGE_SHIFT; |
|
const unsigned int hugetlb_value = flags & mask; |
|
flags &= ~mask; |
|
|
|
if (flags || !hugetlb_value) |
|
printflags(memfd_create_flags, flags, "MFD_???"); |
|
|
|
if (hugetlb_value) |
|
tprintf("%s%u<<MFD_HUGE_SHIFT", |
|
flags ? "|" : "", |
|
hugetlb_value >> MFD_HUGE_SHIFT); |
|
|
|
return RVAL_DECODED | RVAL_FD; |
|
}
|
|
|