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/*
* Check decoding of prctl operations which use arg2 as a pointer to an integer
* value: PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU, and PR_GET_FPEXC.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io>
* 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 <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <linux/prctl.h>
static const char *errstr;
static long
prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
{
static const kernel_ulong_t bogus_arg =
(kernel_ulong_t) 0xdeadbeefbadc0dedULL;
long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
static const kernel_ulong_t bogus_addr1 =
(kernel_ulong_t) 0x1e55c0de00000000ULL;
static const kernel_ulong_t bogus_addr2 =
(kernel_ulong_t) 0xfffffffffffffffdULL;
static const kernel_ulong_t bogus_op_bits =
(kernel_ulong_t) 0xbadc0ded00000000ULL;
static const struct {
kernel_ulong_t val;
const char *str;
} options[] = {
{ 37, "PR_GET_CHILD_SUBREAPER" },
{ 19, "PR_GET_ENDIAN" },
{ 9, "PR_GET_FPEMU" },
{ 11, "PR_GET_FPEXC" },
};
TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, ptr);
long rc;
prctl_marker();
for (unsigned int i = 0; i < ARRAY_SIZE(options); ++i) {
prctl(options[i].val | bogus_op_bits, 0);
printf("prctl(%s, NULL) = %s\n", options[i].str, errstr);
if (bogus_addr1) {
prctl(options[i].val | bogus_op_bits, bogus_addr1);
printf("prctl(%s, %#llx) = %s\n", options[i].str,
(unsigned long long) bogus_addr1, errstr);
}
prctl(options[i].val | bogus_op_bits, bogus_addr2);
printf("prctl(%s, %#llx) = %s\n", options[i].str,
(unsigned long long) bogus_addr2, errstr);
prctl(options[i].val | bogus_op_bits, (uintptr_t) (ptr + 1));
printf("prctl(%s, %p) = %s\n", options[i].str,
ptr + 1, errstr);
rc = prctl(options[i].val | bogus_op_bits, (uintptr_t) ptr);
if (!rc) {
printf("prctl(%s, [%u]) = %s\n",
options[i].str, *ptr, errstr);
} else {
printf("prctl(%s, %p) = %s\n",
options[i].str, ptr, errstr);
}
if (F8ILL_KULONG_SUPPORTED) {
kernel_ulong_t bogus_addr3 = f8ill_ptr_to_kulong(ptr);
prctl(options[i].val | bogus_op_bits, bogus_addr3);
printf("prctl(%s, %#llx) = %s\n", options[i].str,
(unsigned long long) bogus_addr3, errstr);
}
}
puts("+++ exited with 0 +++");
return 0;
}
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