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/*
* Check decoding of lookup_dcookie syscall.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
static void
do_lookup_cookie(uint64_t cookie, char *buf, kernel_ulong_t len)
{
long rc;
const char *errstr;
#if (LONG_MAX > INT_MAX) \
|| (defined __x86_64__ && defined __ILP32__) \
|| defined LINUX_MIPSN32
rc = syscall(__NR_lookup_dcookie, cookie, buf, len);
#else
rc = syscall(__NR_lookup_dcookie, LL_VAL_TO_PAIR(cookie), buf, len);
#endif
errstr = sprintrc(rc);
printf("lookup_dcookie(%" PRIu64 ", ", cookie);
/* Here, we trust successful return code */
if ((rc >= 0) && (rc < (long) INT_MAX)) {
printf("%.*s, ", (int) rc, buf);
} else {
if (buf != NULL)
printf("%p, ", buf);
else
printf("NULL, ");
}
printf("%" PRIu64 ") = %s\n", (uint64_t) len, errstr);
}
int
main(void)
{
enum { BUF_SIZE = 4096 };
static const uint64_t bogus_cookie =
(uint64_t) 0xf157feeddeadfaceULL;
static const kernel_ulong_t bogus_len =
(kernel_ulong_t) 0xbadc0dedda7a1057ULL;
char *buf = tail_alloc(BUF_SIZE);
do_lookup_cookie(0, NULL, 0);
do_lookup_cookie(bogus_cookie, buf + BUF_SIZE, bogus_len);
do_lookup_cookie(bogus_cookie, buf, BUF_SIZE);
puts("+++ exited with 0 +++");
return 0;
}
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