bpf, arm64: add support for constant blinding

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This patch adds recently added constant blinding helpers into the
arm64 eBPF JIT. In the bpf_int_jit_compile() path, requirements are
to utilize bpf_jit_blind_constants()/bpf_jit_prog_release_other()
pair for rewriting the program into a blinded one, and to map the
BPF_REG_AX register to a CPU register. The mapping is on x9.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Yang Shi <yang.shi@linaro.org>
Tested-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Daniel Borkmann 2016-05-13 19:08:34 +02:00 • committed by David S. Miller

parent 959a757916

commit 26eb042ee4

1 changed files with 40 additions and 12 deletions

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arch/arm64/net/bpf_jit_comp.c

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