blob: 97051db9ba5ec8af523fa85b2c83a8fe2f3156f9 [file] [log] [blame]
/*
* Check decoding of "old mmap" edition of mmap syscall.
*
* Copyright (c) 2016 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 <sys/syscall.h>
/*
* On s390x, this is the mmap syscall used by glibc, so,
* from one side, it's already covered by another test, and, from another side,
* it would require additional efforts to filter out mmap calls made by glibc.
*/
#if defined __NR_mmap && \
( defined __arm__ \
|| defined __i386__ \
|| defined __m68k__ \
|| (defined __s390__ && !defined __s390x__) \
)
# include <stdio.h>
# include <string.h>
# include <sys/mman.h>
# include <unistd.h>
int
main(void)
{
long rc = syscall(__NR_mmap, 0);
printf("mmap(NULL) = %ld %s (%m)\n", rc, errno2name());
const unsigned int args1_c[6] = {
0xdeadbeef, /* addr */
0xfacefeed, /* len */
PROT_READ|PROT_EXEC, /* prot */
MAP_FILE|MAP_FIXED, /* flags */
-2U, /* fd */
0xbadc0ded /* offset */
};
const unsigned int page_size = get_page_size();
const unsigned int args2_c[6] = {
0,
page_size,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS,
-1U,
0xfaced000 & -page_size
};
void *args = tail_memdup(args1_c, sizeof(args1_c));
rc = syscall(__NR_mmap, args);
printf("mmap(%#x, %u, PROT_READ|PROT_EXEC, MAP_FILE|MAP_FIXED"
", %d, %#x) = %ld %s (%m)\n",
args1_c[0], args1_c[1], args1_c[4], args1_c[5],
rc, errno2name());
memcpy(args, args2_c, sizeof(args2_c));
rc = syscall(__NR_mmap, args);
printf("mmap(NULL, %u, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS"
", %d, %#x) = %#lx\n",
args2_c[1], args2_c[4], args2_c[5], rc);
void *addr = (void *) rc;
if (mprotect(addr, page_size, PROT_NONE))
perror_msg_and_fail("mprotect(%p, %u, PROT_NONE)",
addr, page_size);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_mmap && (__arm__ || __i386__ || __m68k__"
" || (__s390__ && !__s390x__))")
#endif