selftests/bpf: Add JIT-sequence tests for __arena kfunc arguments

Browse source

Pin the exact rebase sequences the JITs emit for __arena and
__arena__nullable kfunc arguments with __jited assertions on x86-64: the
unconditional truncate-and-add, the nullable test-and-skip variant, and
all five argument registers in one call, which also covers the
REX-prefixed encoding of r8 on x86. The capture kfuncs take the argument
without dereferencing, so only the emitted code is under test. The
tests skip without LLVM disassembler support.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260808003938.3486067-10-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

...

This commit is contained in:

Tejun Heo 2026-08-08 02:39:29 +02:00 • committed by Eduard Zingerman

parent 0996e93691

commit 25818556ed

2 changed files with 101 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

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

View file

98

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

View file