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      1 /*
      2  * Check decoding of pkey_mprotect syscall.
      3  *
      4  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com>
      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 #include "scno.h"
     33 
     34 #ifdef __NR_pkey_mprotect
     35 
     36 # include <stdio.h>
     37 # include <unistd.h>
     38 # include <sys/mman.h>
     39 
     40 const char *
     41 sprintptr(kernel_ulong_t ptr)
     42 {
     43 	static char buf[sizeof(ptr) * 2 + sizeof("0x")];
     44 
     45 	if (ptr)
     46 		snprintf(buf, sizeof(buf), "%#llx", (unsigned long long) ptr);
     47 	else
     48 		return "NULL";
     49 
     50 	return buf;
     51 }
     52 
     53 int
     54 main(void)
     55 {
     56 	static const kernel_ulong_t ptrs[] = {
     57 		0,
     58 		(kernel_ulong_t) 0xfacebeef00000000ULL,
     59 		(kernel_ulong_t) 0xbadc0dedda7a1057ULL,
     60 	};
     61 	static const kernel_ulong_t sizes[] = {
     62 		0,
     63 		(kernel_ulong_t) 0xfacebeef00000000ULL,
     64 		(kernel_ulong_t) 0xfedcba9876543210ULL,
     65 		(kernel_ulong_t) 0x123456789abcdef0ULL,
     66 		(kernel_ulong_t) 0xbadc0dedda7a1057ULL,
     67 	};
     68 	static const struct {
     69 		kernel_ulong_t val;
     70 		const char *str;
     71 	} prots[] = {
     72 		{ ARG_STR(PROT_READ) },
     73 		/* For now, only 0x0300001f are used */
     74 		{ (kernel_ulong_t) 0xdeadfeed00ca7500ULL,
     75 			sizeof(kernel_ulong_t) > sizeof(int) ?
     76 			"0xdeadfeed00ca7500 /* PROT_??? */" :
     77 			"0xca7500 /* PROT_??? */" },
     78 		{ ARG_STR(PROT_READ|PROT_WRITE|0xface00) },
     79 	};
     80 	static const kernel_ulong_t pkeys[] = {
     81 		0,
     82 		-1LL,
     83 		(kernel_ulong_t) 0xface1e55,
     84 		(kernel_ulong_t) 0xbadc0ded00000001,
     85 	};
     86 
     87 	long rc;
     88 	unsigned int i;
     89 	unsigned int j;
     90 	unsigned int k;
     91 	unsigned int l;
     92 
     93 	for (i = 0; i < ARRAY_SIZE(ptrs); i++) {
     94 		for (j = 0; j < ARRAY_SIZE(sizes); j++) {
     95 			for (k = 0; k < ARRAY_SIZE(prots); k++) {
     96 				for (l = 0; l < ARRAY_SIZE(pkeys); l++) {
     97 					rc = syscall(__NR_pkey_mprotect,
     98 						     ptrs[i], sizes[j],
     99 						     prots[k].val, pkeys[l]);
    100 					printf("pkey_mprotect(%s, %llu, %s, %d)"
    101 					       " = %s\n",
    102 					       sprintptr(ptrs[i]),
    103 					       (unsigned long long) sizes[j],
    104 					       prots[k].str, (int) pkeys[l],
    105 					       sprintrc(rc));
    106 				}
    107 			}
    108 		}
    109 	}
    110 
    111 	puts("+++ exited with 0 +++");
    112 
    113 	return 0;
    114 }
    115 
    116 #else
    117 
    118 SKIP_MAIN_UNDEFINED("__NR_pkey_mprotect");
    119 
    120 #endif
    121