mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 18:35:09 +07:00
ee9294d6dd
Add copyright in two files before they get autorubberstamped. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
|
|
* Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
/* Test readlink /proc/self/map_files/... with address 0. */
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <stdlib.h>
|
|
|
|
static void pass(const char *fmt, unsigned long a, unsigned long b)
|
|
{
|
|
char name[64];
|
|
char buf[64];
|
|
|
|
snprintf(name, sizeof(name), fmt, a, b);
|
|
if (readlink(name, buf, sizeof(buf)) == -1)
|
|
exit(1);
|
|
}
|
|
|
|
static void fail(const char *fmt, unsigned long a, unsigned long b)
|
|
{
|
|
char name[64];
|
|
char buf[64];
|
|
|
|
snprintf(name, sizeof(name), fmt, a, b);
|
|
if (readlink(name, buf, sizeof(buf)) == -1 && errno == ENOENT)
|
|
return;
|
|
exit(1);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
const unsigned int PAGE_SIZE = sysconf(_SC_PAGESIZE);
|
|
void *p;
|
|
int fd;
|
|
unsigned long a, b;
|
|
|
|
fd = open("/dev/zero", O_RDONLY);
|
|
if (fd == -1)
|
|
return 1;
|
|
|
|
p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE|MAP_FIXED, fd, 0);
|
|
if (p == MAP_FAILED) {
|
|
if (errno == EPERM)
|
|
return 2;
|
|
return 1;
|
|
}
|
|
|
|
a = (unsigned long)p;
|
|
b = (unsigned long)p + PAGE_SIZE;
|
|
|
|
pass("/proc/self/map_files/%lx-%lx", a, b);
|
|
fail("/proc/self/map_files/ %lx-%lx", a, b);
|
|
fail("/proc/self/map_files/%lx -%lx", a, b);
|
|
fail("/proc/self/map_files/%lx- %lx", a, b);
|
|
fail("/proc/self/map_files/%lx-%lx ", a, b);
|
|
fail("/proc/self/map_files/0%lx-%lx", a, b);
|
|
fail("/proc/self/map_files/%lx-0%lx", a, b);
|
|
if (sizeof(long) == 4) {
|
|
fail("/proc/self/map_files/100000000%lx-%lx", a, b);
|
|
fail("/proc/self/map_files/%lx-100000000%lx", a, b);
|
|
} else if (sizeof(long) == 8) {
|
|
fail("/proc/self/map_files/10000000000000000%lx-%lx", a, b);
|
|
fail("/proc/self/map_files/%lx-10000000000000000%lx", a, b);
|
|
} else
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|