430d97a8a7
Add per-CPU variable to bpf_testmod.ko and use those from new selftest to validate it works end-to-end. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Hao Luo <haoluo@google.com> Link: https://lore.kernel.org/bpf/20210112075520.4103414-8-andrii@kernel.org
26 lines
466 B
C
26 lines
466 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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extern const int bpf_testmod_ksym_percpu __ksym;
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int out_mod_ksym_global = 0;
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bool triggered = false;
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SEC("raw_tp/sys_enter")
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int handler(const void *ctx)
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{
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int *val;
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__u32 cpu;
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val = (int *)bpf_this_cpu_ptr(&bpf_testmod_ksym_percpu);
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out_mod_ksym_global = *val;
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triggered = true;
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return 0;
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}
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char LICENSE[] SEC("license") = "GPL";
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