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/*
* Check decoding of map_shadow_stack syscall.
*
* Copyright (c) 2023-2024 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <unistd.h>
static const char *errstr;
static long
k_map_shadow_stack(const unsigned long addr,
const unsigned long len,
const unsigned int flags)
{
const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
const kernel_ulong_t arg1 = addr;
const kernel_ulong_t arg2 = len;
const kernel_ulong_t arg3 = fill | flags;
const long rc = syscall(__NR_map_shadow_stack, arg1, arg2, arg3, bad, bad, bad);
errstr = sprintrc(rc);
return rc;
}
static const struct {
unsigned long val;
const char *raw;
const char *verbose;
const char *abbrev;
} flags[] = { {
ARG_STR(0x1),
"0x1 /* SHADOW_STACK_SET_TOKEN */",
"SHADOW_STACK_SET_TOKEN"
}, {
ARG_STR(0xfffffffe),
"0xfffffffe /* SHADOW_STACK_??? */",
"0xfffffffe /* SHADOW_STACK_??? */"
}, {
ARG_STR(0xffffffff),
"0xffffffff /* SHADOW_STACK_SET_TOKEN|0xfffffffe */",
"SHADOW_STACK_SET_TOKEN|0xfffffffe"
},
};
int
main(void)
{
const unsigned long addr = (unsigned long) 0xfffffff1fffffff2ULL;
const unsigned long len = (unsigned long) 0xfffffff3fffffff4ULL;
k_map_shadow_stack(0, 0, 0);
printf("map_shadow_stack(NULL, 0, 0) = %s\n", errstr);
for (size_t i = 0; i < ARRAY_SIZE(flags); ++i) {
k_map_shadow_stack(addr, len, flags[i].val);
printf("map_shadow_stack(%#lx, %lu, %s) = %s\n",
addr, len, flags[i].XLAT_name, errstr);
}
puts("+++ exited with 0 +++");
return 0;
}
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