selftests/bpf: Convert test printk to use rodata.
Convert test trace_printk to more aggressively validate and use rodata.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/tools/testing/selftests/bpf/prog_tests/trace_printk.c b/tools/testing/selftests/bpf/prog_tests/trace_printk.c
index 39b0dec..60c2347 100644
--- a/tools/testing/selftests/bpf/prog_tests/trace_printk.c
+++ b/tools/testing/selftests/bpf/prog_tests/trace_printk.c
@@ -21,6 +21,9 @@ void test_trace_printk(void)
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
return;
+ ASSERT_EQ(skel->rodata->sys_enter_fmt[0], 'T', "invalid printk fmt string");
+ skel->rodata->sys_enter_fmt[0] = 't';
+
err = trace_printk__load(skel);
if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err))
goto cleanup;
diff --git a/tools/testing/selftests/bpf/progs/trace_printk.c b/tools/testing/selftests/bpf/progs/trace_printk.c
index 8ca7f39..18c8baa 100644
--- a/tools/testing/selftests/bpf/progs/trace_printk.c
+++ b/tools/testing/selftests/bpf/progs/trace_printk.c
@@ -10,10 +10,10 @@ char _license[] SEC("license") = "GPL";
int trace_printk_ret = 0;
int trace_printk_ran = 0;
-SEC("tp/raw_syscalls/sys_enter")
+SEC("fentry/__x64_sys_nanosleep")
int sys_enter(void *ctx)
{
- static const char fmt[] = "testing,testing %d\n";
+ static const char fmt[] = "Testing,testing %d\n";
trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt),
++trace_printk_ran);
