bpf, x64: Replace some stack_size usage with offset variables

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As suggested by Andrii, adding variables for registers and ip
address offsets, which makes the code more clear, rather than
abusing single stack_size variable for everything.

Also describing the stack layout in the comment.

There is no function change.

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211208193245.172141-4-jolsa@kernel.org

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Jiri Olsa 2021-12-08 20:32:43 +01:00 • committed by Alexei Starovoitov

parent 2b070c2bc8

commit 5edf6a1983

1 changed files with 28 additions and 14 deletions

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arch/x86/net/bpf_jit_comp.c

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