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/*
* Check decoding of remap_file_pages syscall.
*
* Copyright (c) 2016-2017 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>
#ifdef __NR_remap_file_pages
# include <stdio.h>
# include <stdint.h>
# include <unistd.h>
# include <linux/mman.h>
static const char *errstr;
static long
k_remap_file_pages(const kernel_ulong_t addr,
const kernel_ulong_t size,
const kernel_ulong_t prot,
const kernel_ulong_t pgoff,
const kernel_ulong_t flags)
{
const long rc = syscall(__NR_remap_file_pages,
addr, size, prot, pgoff, flags);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
kernel_ulong_t size = (kernel_ulong_t) 0xdefaced1bad2f00dULL;
kernel_ulong_t prot = PROT_READ|PROT_WRITE|PROT_EXEC;
kernel_ulong_t pgoff = (kernel_ulong_t) 0xcaf3babebad4deedULL;
kernel_ulong_t flags = MAP_PRIVATE|MAP_ANONYMOUS;
k_remap_file_pages(addr, size, prot, pgoff, flags);
printf("remap_file_pages(%#jx, %ju, %s, %ju, %s) = %s\n",
(uintmax_t) addr, (uintmax_t) size,
"PROT_READ|PROT_WRITE|PROT_EXEC",
(uintmax_t) pgoff, "MAP_PRIVATE|MAP_ANONYMOUS", errstr);
#ifdef MAP_HUGETLB
# ifndef MAP_HUGE_2MB
# ifndef MAP_HUGE_SHIFT
# define MAP_HUGE_SHIFT 26
# endif
# define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
# endif /* !MAP_HUGE_2MB */
addr = (kernel_ulong_t) 0xfacefeeddeadf00dULL;
size = (kernel_ulong_t) 0xdefaced1bad2beefULL;
prot = (kernel_ulong_t) 0xdefaced00000000ULL | PROT_NONE;
flags = MAP_TYPE | MAP_FIXED | MAP_NORESERVE | MAP_HUGETLB | MAP_HUGE_2MB;
k_remap_file_pages(addr, size, prot, pgoff, flags);
printf("remap_file_pages(%#jx, %ju, %s, %ju"
", %#x /* MAP_??? */"
"|MAP_FIXED|MAP_NORESERVE|MAP_HUGETLB|21<<MAP_HUGE_SHIFT)"
" = %s\n",
(uintmax_t) addr, (uintmax_t) size,
prot == PROT_NONE ? "PROT_NONE" :
"0xdefaced00000000 /* PROT_??? */",
(uintmax_t) pgoff, MAP_TYPE, errstr);
#endif /* MAP_HUGETLB */
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_remap_file_pages")
#endif
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