Dmitry V. Levin
c6782f144a
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.
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/*
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* Check decoding of memfd_create syscall.
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*
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* Copyright (c) 2015-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#include "scno.h"
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#ifdef __NR_memfd_create
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# include <stdio.h>
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# include <stdint.h>
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# include <unistd.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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# 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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static const char *errstr;
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static long
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k_memfd_create(const kernel_ulong_t name, const kernel_ulong_t flags)
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{
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const long rc = syscall(__NR_memfd_create, name, flags);
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errstr = sprintrc(rc);
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return rc;
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}
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int
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main(void)
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{
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const size_t size = 255 - (sizeof("memfd:") - 1) + 1;
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char *pattern = tail_alloc(size);
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fill_memory_ex(pattern, size, '0', 10);
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k_memfd_create((uintptr_t) pattern, 0);
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printf("memfd_create(\"%.*s\"..., 0) = %s\n",
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(int) size - 1, pattern, errstr);
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kernel_ulong_t flags = (kernel_ulong_t) 0xfacefeed00000007ULL;
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# define flags1_str "MFD_CLOEXEC|MFD_ALLOW_SEALING|MFD_HUGETLB"
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k_memfd_create((uintptr_t) pattern, flags);
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# if XLAT_VERBOSE
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printf("memfd_create(\"%.*s\"..., %s /* %s */) = %s\n",
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(int) size - 1, pattern,
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"0x7", flags1_str, errstr);
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# else
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printf("memfd_create(\"%.*s\"..., %s) = %s\n",
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(int) size - 1, pattern,
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# if XLAT_RAW
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"0x7",
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# else
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flags1_str,
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# endif
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errstr);
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# endif
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pattern[size - 1] = '\0';
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flags = 30 << MFD_HUGE_SHIFT;
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k_memfd_create((uintptr_t) pattern, flags);
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# if XLAT_RAW
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printf("memfd_create(\"%s\", %#x) = %s\n",
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pattern, (unsigned int) flags, errstr);
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# elif XLAT_VERBOSE
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printf("memfd_create(\"%s\", %#x /* %s */) = %s\n",
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pattern, (unsigned int) flags, "30<<MFD_HUGE_SHIFT", errstr);
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# else /* XLAT_ABBREV */
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printf("memfd_create(\"%s\", 30<<MFD_HUGE_SHIFT) = %s\n",
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pattern, errstr);
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# endif
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pattern += size - 1;
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flags = (kernel_ulong_t) -1ULL;
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k_memfd_create(0, flags);
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flags = -1U & ~(7 | (MFD_HUGE_MASK << MFD_HUGE_SHIFT));
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# define memfd_create_fmt "%s|%#x|%u<<MFD_HUGE_SHIFT"
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printf("memfd_create(NULL, "
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# if XLAT_RAW
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"0xffffffff) = %s\n",
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# else
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# if XLAT_VERBOSE
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"0xffffffff /* " memfd_create_fmt " */"
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# else /* XLAT_ABBREV */
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memfd_create_fmt
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# endif
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") = %s\n",
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flags1_str, (unsigned int) flags, MFD_HUGE_MASK,
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# endif
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errstr);
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_memfd_create")
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#endif
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