selftests/bpf: add new verifier_gotox test

Add a set of tests to validate core gotox functionality
without need to rely on compilers.

Signed-off-by: Anton Protopopov <[email protected]>

Author: aspsk

tools/testing/selftests/bpf/prog_tests/verifier.c

@@ -35,6 +35,7 @@
 #include "verifier_global_subprogs.skel.h"
 #include "verifier_global_ptr_args.skel.h"
 #include "verifier_gotol.skel.h"
+#include "verifier_gotox.skel.h"
 #include "verifier_helper_access_var_len.skel.h"
 #include "verifier_helper_packet_access.skel.h"
 #include "verifier_helper_restricted.skel.h"
@@ -173,6 +174,7 @@ void test_verifier_div_overflow(void)         { RUN(verifier_div_overflow); }
 void test_verifier_global_subprogs(void)      { RUN(verifier_global_subprogs); }
 void test_verifier_global_ptr_args(void)      { RUN(verifier_global_ptr_args); }
 void test_verifier_gotol(void)                { RUN(verifier_gotol); }
+void test_verifier_gotox(void)                { RUN(verifier_gotox); }
 void test_verifier_helper_access_var_len(void) { RUN(verifier_helper_access_var_len); }
 void test_verifier_helper_packet_access(void) { RUN(verifier_helper_packet_access); }
 void test_verifier_helper_restricted(void)    { RUN(verifier_helper_restricted); }