bpf: Support new signed div/mod instructions.

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Add interpreter/jit support for new signed div/mod insns.
The new signed div/mod instructions are encoded with
unsigned div/mod instructions plus insn->off == 1.
Also add basic verifier support to ensure new insns get
accepted.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230728011219.3714605-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Yonghong Song 2023-07-27 18:12:19 -07:00 • committed by Alexei Starovoitov

parent 0845c3db7b

commit ec0e2da95f

3 changed files with 117 additions and 26 deletions

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27

arch/x86/net/bpf_jit_comp.c

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110

kernel/bpf/core.c

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6

kernel/bpf/verifier.c

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