97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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* Check decoding of lookup_dcookie syscall.
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*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* All rights reserved.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef __NR_lookup_dcookie
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# include <inttypes.h>
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# include <limits.h>
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# include <stdio.h>
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# include <unistd.h>
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static void
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do_lookup_cookie(uint64_t cookie, char *buf, kernel_ulong_t len)
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{
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long rc;
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const char *errstr;
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# if (LONG_MAX > INT_MAX) \
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|| (defined __x86_64__ && defined __ILP32__) \
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|| defined LINUX_MIPSN32
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rc = syscall(__NR_lookup_dcookie, cookie, buf, len);
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# else
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rc = syscall(__NR_lookup_dcookie, LL_VAL_TO_PAIR(cookie), buf, len);
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# endif
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errstr = sprintrc(rc);
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printf("lookup_dcookie(%" PRIu64 ", ", cookie);
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/* Here, we trust successful return code */
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if ((rc >= 0) && (rc < (long) INT_MAX)) {
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printf("%.*s, ", (int) rc, buf);
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} else {
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if (buf != NULL)
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printf("%p, ", buf);
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else
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printf("NULL, ");
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}
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printf("%" PRIu64 ") = %s\n", (uint64_t) len, errstr);
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}
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int
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main(void)
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{
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enum { BUF_SIZE = 4096 };
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static const uint64_t bogus_cookie =
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(uint64_t) 0xf157feeddeadfaceULL;
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static const kernel_ulong_t bogus_len =
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(kernel_ulong_t) 0xbadc0dedda7a1057ULL;
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char *buf = tail_alloc(BUF_SIZE);
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do_lookup_cookie(0, NULL, 0);
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do_lookup_cookie(bogus_cookie, buf + BUF_SIZE, bogus_len);
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do_lookup_cookie(bogus_cookie, buf, BUF_SIZE);
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_lookup_dcookie");
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#endif
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