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      1 /*
      2  * Check decoding of get_mempolicy syscall.
      3  *
      4  * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "tests.h"
     31 #include <asm/unistd.h>
     32 
     33 #ifdef __NR_get_mempolicy
     34 
     35 # include <stdio.h>
     36 # include <unistd.h>
     37 
     38 # include "xlat.h"
     39 # include "xlat/policies.h"
     40 
     41 # define MAX_STRLEN 3
     42 # define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
     43 		      / (8 * sizeof(long)))
     44 
     45 static void
     46 print_nodes(unsigned long maxnode)
     47 {
     48 	unsigned long *const nodemask =
     49 		tail_alloc(sizeof(*nodemask) * NLONGS(maxnode));
     50 
     51 	if (syscall(__NR_get_mempolicy, 0, nodemask, maxnode, 0, 0)) {
     52 		printf("get_mempolicy(NULL, %p, %lu, NULL, 0) = -1 %s (%m)\n",
     53 		       nodemask, maxnode, errno2name());
     54 		return;
     55 	}
     56 
     57 	printf("get_mempolicy(NULL, [");
     58 
     59 	unsigned int nlongs = NLONGS(maxnode);
     60 	unsigned int i;
     61 	for (i = 0; i < nlongs; ++i) {
     62 		if (i)
     63 			fputs(", ", stdout);
     64 		if (i >= MAX_STRLEN) {
     65 			fputs("...", stdout);
     66 			break;
     67 		}
     68 		printf("%#0*lx", (int) sizeof(*nodemask) * 2 + 2, nodemask[i]);
     69 	}
     70 
     71 	printf("], %lu, NULL, 0) = 0\n", maxnode);
     72 }
     73 
     74 int
     75 main(void)
     76 {
     77 	long rc;
     78 
     79 	if (syscall(__NR_get_mempolicy, 0, 0, 0, 0, 0))
     80 		perror_msg_and_skip("get_mempolicy");
     81 	puts("get_mempolicy(NULL, NULL, 0, NULL, 0) = 0");
     82 
     83 	int *mode = (void *) 0xdefaced1baddeed2;
     84 	unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
     85 	const unsigned long *nodemask = (void *) 0xfacedad3bebefed4ULL;
     86 	const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
     87 	const unsigned long flags = -1U;
     88 	rc = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
     89 	printf("get_mempolicy(%p, %p, %lu, %#lx, %s|%#lx) = %ld %s (%m)\n",
     90 	       mode, nodemask, maxnode, addr,
     91 	       "MPOL_F_NODE|MPOL_F_ADDR",
     92 	       flags & ~3, rc, errno2name());
     93 
     94 	mode = tail_alloc(sizeof(*mode));
     95 
     96 	rc = syscall(__NR_get_mempolicy, mode, 0, 0, 0, 0);
     97 	printf("get_mempolicy([");
     98 	printxval(policies, (unsigned) *mode, "MPOL_???");
     99 	printf("], NULL, 0, NULL, 0) = %ld\n", rc);
    100 
    101 	*mode = -1;
    102 	rc = syscall(__NR_get_mempolicy, mode, 0, 0, mode - 1, 2);
    103 	printf("get_mempolicy([");
    104 	printxval(policies, (unsigned) *mode, "MPOL_???");
    105 	printf("], NULL, 0, %p, MPOL_F_ADDR) = %ld\n", mode - 1, rc);
    106 
    107 	maxnode = get_page_size() * 8;
    108 
    109 	print_nodes(maxnode);
    110 	print_nodes(maxnode + 1);
    111 	print_nodes(maxnode + 2);
    112 
    113 	maxnode = sizeof(*nodemask) * 8;
    114 	print_nodes(maxnode - 1);
    115 	print_nodes(maxnode    );
    116 	print_nodes(maxnode + 1);
    117 	print_nodes(maxnode + 2);
    118 	print_nodes(maxnode * 2 - 1);
    119 	print_nodes(maxnode * 2    );
    120 	print_nodes(maxnode * 2 + 1);
    121 	print_nodes(maxnode * 2 + 2);
    122 	print_nodes(maxnode * 3 - 1);
    123 	print_nodes(maxnode * 3    );
    124 	print_nodes(maxnode * 3 + 1);
    125 	print_nodes(maxnode * 3 + 2);
    126 
    127 	puts("+++ exited with 0 +++");
    128 	return 0;
    129 }
    130 
    131 #else
    132 
    133 SKIP_MAIN_UNDEFINED("__NR_get_mempolicy")
    134 
    135 #endif
    136