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/*
* Check decoding of SPARC-specific kern_features syscall.
*
* Copyright (c) 2018-2019 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "raw_syscall.h"
#include "scno.h"
#if defined __NR_kern_features && defined raw_syscall_0
# include <errno.h>
# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
static void
test_kern_features(unsigned int num)
{
/* The expected return codes, as enforced by fault injection */
static struct {
kernel_ulong_t ret;
const char *str;
} checks[] = {
{ 0, NULL },
{ 1, "KERN_FEATURE_MIXED_MODE_STACK" },
{ 2, "0x2" },
{ 0x7ffffffe, "0x7ffffffe" },
{ 0x7fffffff, "KERN_FEATURE_MIXED_MODE_STACK|0x7ffffffe" },
{ (kernel_ulong_t) 0xbadc0deddeadfaceULL,
sizeof(kernel_ulong_t) == 8 ?
"0xbadc0deddeadface" : "0xdeadface" },
{ (kernel_ulong_t) -1ULL,
sizeof(kernel_ulong_t) == 8 ?
"KERN_FEATURE_MIXED_MODE_STACK|0xfffffffffffffffe" :
"KERN_FEATURE_MIXED_MODE_STACK|0xfffffffe" },
};
kernel_ulong_t err = 0;
kernel_ulong_t rc = raw_syscall_0(__NR_kern_features, &err);
if (err) {
errno = rc;
printf("kern_features() = %s\n", sprintrc(-1));
return;
}
printf("kern_features() = %#llx", (unsigned long long) rc);
if (num < ARRAY_SIZE(checks)) {
if (rc != checks[num].ret)
error_msg_and_fail("Expected return value (%llx) "
"doesn't match expected one (%#llx)",
(unsigned long long) rc,
(unsigned long long) checks[num].ret);
if (checks[num].str)
printf(" (%s)", checks[num].str);
printf(" (INJECTED)");
} else if (rc) {
printf(" (");
if (rc & 1)
printf("KERN_FEATURE_MIXED_MODE_STACK");
if (rc & ~1ULL) {
if (rc & 1)
printf("|");
printf("%#llx", rc & ~1ULL);
}
printf(")");
}
puts("");
}
int
main(int ac, char **av)
{
test_kern_features(ac > 1 ? atoi(av[1]) : -1);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_kern_features && raw_syscall_0");
#endif
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