diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2021-01-11 23:55:20 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-01-12 17:24:30 -0800 |
| commit | 430d97a8a7bf1500c081ce756ff2ead73d2303c5 (patch) | |
| tree | 348ac2808f0006934b49aa2f472b7d069af710ba /tools/testing/selftests/bpf/progs | |
| parent | 284d2587ea8a96f97ca519a3de683ff226e9e2b3 (diff) | |
selftests/bpf: Test kernel module ksym externs
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
Diffstat (limited to 'tools/testing/selftests/bpf/progs')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_ksyms_module.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_ksyms_module.c b/tools/testing/selftests/bpf/progs/test_ksyms_module.c new file mode 100644 index 000000000000..d6a0b3086b90 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_ksyms_module.c @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include "vmlinux.h" + +#include <bpf/bpf_helpers.h> + +extern const int bpf_testmod_ksym_percpu __ksym; + +int out_mod_ksym_global = 0; +bool triggered = false; + +SEC("raw_tp/sys_enter") +int handler(const void *ctx) +{ + int *val; + __u32 cpu; + + val = (int *)bpf_this_cpu_ptr(&bpf_testmod_ksym_percpu); + out_mod_ksym_global = *val; + triggered = true; + + return 0; +} + +char LICENSE[] SEC("license") = "GPL"; |