diff options
| author | Jiri Olsa | 2021-12-08 20:32:42 +0100 |
|---|---|---|
| committer | Alexei Starovoitov | 2021-12-13 09:24:22 -0800 |
| commit | 2b070c2bc885977ca8fe76ba8f6b9d73d8d20e39 (patch) | |
| tree | 0e88fc1b311d784d927c307fe684853c62a11f01 /tools | |
| parent | bb6728d756112596881a5fdf2040544031905840 (diff) | |
selftests/bpf: Add test to access int ptr argument in tracing program
Adding verifier test for accessing int pointer argument in
tracing programs.
The test program loads 2nd argument of bpf_modify_return_test
function which is int pointer and checks that verifier allows
that.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211208193245.172141-3-jolsa@kernel.org
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/verifier/btf_ctx_access.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/btf_ctx_access.c b/tools/testing/selftests/bpf/verifier/btf_ctx_access.c new file mode 100644 index 000000000000..6340db6b46dc --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/btf_ctx_access.c @@ -0,0 +1,12 @@ +{ + "btf_ctx_access accept", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 8), /* load 2nd argument value (int pointer) */ + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACING, + .expected_attach_type = BPF_TRACE_FENTRY, + .kfunc = "bpf_modify_return_test", +}, |