bpf: x86: Factor out emission of REX byte

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The JIT case for encoding atomic ops is about to get more
complicated. In order to make the review & resulting code easier,
let's factor out some shared helpers.

Signed-off-by: Brendan Jackman <jackmanb@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210114181751.768687-3-jackmanb@google.com

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Brendan Jackman 2021-01-14 18:17:42 +00:00 • committed by Alexei Starovoitov

parent 11c11d0751

commit 74007cfc1f

1 changed files with 23 additions and 16 deletions

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arch/x86/net/bpf_jit_comp.c

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