mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-30 12:04:07 +00:00
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*-
|
|
* Copyright (c) 2009 Simon L. Nielsen <simon@FreeBSD.org>,
|
|
* Bjoern A. Zeeb <bz@FreeBSD.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
#include <err.h>
|
|
|
|
const struct tests {
|
|
void *addr;
|
|
int ok[2]; /* Depending on security.bsd.map_at_zero {0, !=0}. */
|
|
} tests[] = {
|
|
{ (void *)0, { 0, 1 } }, /* Test sysctl. */
|
|
{ (void *)1, { 0, 0 } },
|
|
{ (void *)(PAGE_SIZE - 1), { 0, 0 } },
|
|
{ (void *)PAGE_SIZE, { 1, 1 } },
|
|
{ (void *)-1, { 0, 0 } },
|
|
{ (void *)(-PAGE_SIZE), { 0, 0 } },
|
|
{ (void *)(-1 - PAGE_SIZE), { 0, 0 } },
|
|
{ (void *)(-1 - PAGE_SIZE - 1), { 0, 0 } },
|
|
{ (void *)(0x1000 * PAGE_SIZE), { 1, 1 } },
|
|
};
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
void *p;
|
|
size_t len;
|
|
int i, error, mib[3], map_at_zero;
|
|
|
|
error = 0;
|
|
|
|
/* Get the current sysctl value of security.bsd.map_at_zero. */
|
|
len = sizeof(mib) / sizeof(*mib);
|
|
if (sysctlnametomib("security.bsd.map_at_zero", mib, &len) == -1)
|
|
err(1, "sysctlnametomib(security.bsd.map_at_zero)");
|
|
|
|
len = sizeof(map_at_zero);
|
|
if (sysctl(mib, 3, &map_at_zero, &len, NULL, 0) == -1)
|
|
err(1, "sysctl(security.bsd.map_at_zero)");
|
|
|
|
/* Normalize to 0 or 1 for array access. */
|
|
map_at_zero = !!map_at_zero;
|
|
|
|
for (i=0; i < (sizeof(tests) / sizeof(*tests)); i++) {
|
|
p = mmap((void *)tests[i].addr, PAGE_SIZE,
|
|
PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED,
|
|
-1, 0);
|
|
if (p == MAP_FAILED) {
|
|
if (tests[i].ok[map_at_zero] != 0)
|
|
error++;
|
|
warnx("%s: mmap(%p, ...) failed.",
|
|
(tests[i].ok[map_at_zero] == 0) ? "OK " : "ERR",
|
|
tests[i].addr);
|
|
} else {
|
|
if (tests[i].ok[map_at_zero] != 1)
|
|
error++;
|
|
warnx("%s: mmap(%p, ...) succeeded: p=%p",
|
|
(tests[i].ok[map_at_zero] == 1) ? "OK " : "ERR",
|
|
tests[i].addr, p);
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
err(1, "---\nERROR: %d unexpected results.", error);
|
|
|
|
return (error != 0);
|
|
}
|