| /* |
| * Check decoding of memfd_create syscall. |
| * |
| * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org> |
| * 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 "tests.h" |
| #include <asm/unistd.h> |
| #include "scno.h" |
| |
| #ifdef __NR_memfd_create |
| |
| # include <stdio.h> |
| # include <stdint.h> |
| # include <unistd.h> |
| |
| # ifdef HAVE_LINUX_MEMFD_H |
| # include <linux/memfd.h> |
| # endif |
| |
| # ifndef MFD_HUGE_SHIFT |
| # define MFD_HUGE_SHIFT 26 |
| # endif |
| |
| # ifndef MFD_HUGE_MASK |
| # define MFD_HUGE_MASK 0x3f |
| # endif |
| |
| static const char *errstr; |
| |
| static long |
| k_memfd_create(const kernel_ulong_t name, const kernel_ulong_t flags) |
| { |
| const long rc = syscall(__NR_memfd_create, name, flags); |
| errstr = sprintrc(rc); |
| return rc; |
| } |
| |
| int |
| main(void) |
| { |
| const size_t size = 255 - (sizeof("memfd:") - 1) + 1; |
| char *pattern = tail_alloc(size); |
| fill_memory_ex(pattern, size, '0', 10); |
| |
| k_memfd_create((uintptr_t) pattern, 0); |
| printf("memfd_create(\"%.*s\"..., 0) = %s\n", |
| (int) size - 1, pattern, errstr); |
| |
| kernel_ulong_t flags = (kernel_ulong_t) 0xfacefeed00000007ULL; |
| k_memfd_create((uintptr_t) pattern, flags); |
| printf("memfd_create(\"%.*s\"..., %s) = %s\n", |
| (int) size - 1, pattern, |
| "MFD_CLOEXEC|MFD_ALLOW_SEALING|MFD_HUGETLB", |
| errstr); |
| |
| pattern[size - 1] = '\0'; |
| flags = 30 << MFD_HUGE_SHIFT; |
| k_memfd_create((uintptr_t) pattern, flags); |
| printf("memfd_create(\"%s\", 30<<MFD_HUGE_SHIFT) = %s\n", |
| pattern, errstr); |
| |
| pattern += size - 1; |
| flags = (kernel_ulong_t) -1ULL; |
| k_memfd_create(0, flags); |
| flags = -1U & ~(7 | (MFD_HUGE_MASK << MFD_HUGE_SHIFT)); |
| printf("memfd_create(NULL, MFD_CLOEXEC|MFD_ALLOW_SEALING|MFD_HUGETLB" |
| "|%#x|%u<<MFD_HUGE_SHIFT) = %s\n", |
| (unsigned int) flags, MFD_HUGE_MASK, errstr); |
| |
| puts("+++ exited with 0 +++"); |
| return 0; |
| } |
| |
| #else |
| |
| SKIP_MAIN_UNDEFINED("__NR_memfd_create") |
| |
| #endif |