selftests/bpf: validate jit behaviour for tail calls

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A program calling sub-program which does a tail call.
The idea is to verify instructions generated by jit for tail calls:
- in program and sub-program prologues;
- for subprogram call instruction;
- for tail call itself.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20240820102357.3372779-9-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Eduard Zingerman 2024-08-20 03:23:56 -07:00 • committed by Alexei Starovoitov

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commit e5bdd6a8be

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

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tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c

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