97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*-
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* Copyright (c) 2009 Simon L. Nielsen <simon@FreeBSD.org>,
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* Bjoern A. Zeeb <bz@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <err.h>
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const struct tests {
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void *addr;
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int ok[2]; /* Depending on security.bsd.map_at_zero {0, !=0}. */
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} tests[] = {
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{ (void *)0, { 0, 1 } }, /* Test sysctl. */
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{ (void *)1, { 0, 0 } },
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{ (void *)(PAGE_SIZE - 1), { 0, 0 } },
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{ (void *)PAGE_SIZE, { 1, 1 } },
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{ (void *)-1, { 0, 0 } },
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{ (void *)(-PAGE_SIZE), { 0, 0 } },
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{ (void *)(-1 - PAGE_SIZE), { 0, 0 } },
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{ (void *)(-1 - PAGE_SIZE - 1), { 0, 0 } },
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{ (void *)(0x1000 * PAGE_SIZE), { 1, 1 } },
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};
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int
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main(void)
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{
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void *p;
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size_t len;
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int i, error, mib[3], map_at_zero;
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error = 0;
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/* Get the current sysctl value of security.bsd.map_at_zero. */
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len = sizeof(mib) / sizeof(*mib);
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if (sysctlnametomib("security.bsd.map_at_zero", mib, &len) == -1)
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err(1, "sysctlnametomib(security.bsd.map_at_zero)");
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len = sizeof(map_at_zero);
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if (sysctl(mib, 3, &map_at_zero, &len, NULL, 0) == -1)
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err(1, "sysctl(security.bsd.map_at_zero)");
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/* Normalize to 0 or 1 for array access. */
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map_at_zero = !!map_at_zero;
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for (i=0; i < (sizeof(tests) / sizeof(*tests)); i++) {
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p = mmap((void *)tests[i].addr, PAGE_SIZE,
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PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED,
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-1, 0);
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if (p == MAP_FAILED) {
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if (tests[i].ok[map_at_zero] != 0)
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error++;
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warnx("%s: mmap(%p, ...) failed.",
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(tests[i].ok[map_at_zero] == 0) ? "OK " : "ERR",
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tests[i].addr);
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} else {
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if (tests[i].ok[map_at_zero] != 1)
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error++;
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warnx("%s: mmap(%p, ...) succeeded: p=%p",
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(tests[i].ok[map_at_zero] == 1) ? "OK " : "ERR",
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tests[i].addr, p);
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}
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}
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if (error)
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err(1, "---\nERROR: %d unexpected results.", error);
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return (error != 0);
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}
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