35 lines · c
1// SPDX-License-Identifier: GPL-2.02/* 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 8SEC("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; \20l0_%=: if r1 != 0 goto l1_%=; \21 *(u64*)(r6 + 0) = r1; \22l1_%=: 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 34char _license[] SEC("license") = "GPL";35