1 // SPDX-License-Identifier: GPL-2.0
2 /* Converted from tools/testing/selftests/bpf/verifier/unpriv.c */
3
4 #include "vmlinux.h"
5 #include <bpf/bpf_helpers.h>
6 #include "bpf_misc.h"
7
8 SEC("perf_event")
9 __description("unpriv: spill/fill of different pointers ldx")
10 __failure __msg("same insn cannot be used with different pointers")
11 __naked void fill_of_different_pointers_ldx(void)
12 {
13 asm volatile (" \
14 r6 = r10; \
15 r6 += -8; \
16 if r1 == 0 goto l0_%=; \
17 r2 = r10; \
18 r2 += %[__imm_0]; \
19 *(u64*)(r6 + 0) = r2; \
20 l0_%=: if r1 != 0 goto l1_%=; \
21 *(u64*)(r6 + 0) = r1; \
22 l1_%=: r1 = *(u64*)(r6 + 0); \
23 r1 = *(u64*)(r1 + %[sample_period]); \
24 r0 = 0; \
25 exit; \
26 " :
27 : __imm_const(__imm_0,
28 -(__s32) offsetof(struct bpf_perf_event_data, sample_period) - 8),
29 __imm_const(sample_period,
30 offsetof(struct bpf_perf_event_data, sample_period))
31 : __clobber_all);
32 }
33
34 char _license[] SEC("license") = "GPL";
35
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