1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5#include "bpf_misc.h"
 6
 7SEC("socket")
 8__description("scalars: find linked scalars")
 9__failure
10__msg("math between fp pointer and 2147483647 is not allowed")
11__naked void scalars(void)
12{
13	asm volatile ("				\
14	r0 = 0;					\
15	r1 = 0x80000001 ll;			\
16	r1 /= 1;				\
17	r2 = r1;				\
18	r4 = r1;				\
19	w2 += 0x7FFFFFFF;			\
20	w4 += 0;				\
21	if r2 == 0 goto l1;			\
22	exit;					\
23l1:						\
24	r4 >>= 63;				\
25	r3 = 1;					\
26	r3 -= r4;				\
27	r3 *= 0x7FFFFFFF;			\
28	r3 += r10;				\
29	*(u8*)(r3 - 1) = r0;			\
30	exit;					\
31"	::: __clobber_all);
32}
33
34char _license[] SEC("license") = "GPL";