| Message ID | 20211208193245.172141-3-jolsa@kernel.org (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | BPF |
| Headers | show |
| Series | bpf: Add helpers to access traced function arguments | expand |
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", +},
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> --- .../testing/selftests/bpf/verifier/btf_ctx_access.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 tools/testing/selftests/bpf/verifier/btf_ctx_access.c