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MIPS: BPF: Use BPF register names to describe the ABI
Use the BPF register names instead of the arch register names to document how the ABI is structured. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: netdev@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Daniel Borkmann <dborkman@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: linux-kernel@vger.kernel.org Patchwork: http://patchwork.linux-mips.org/patch/10529/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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/* ABI
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*
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* s3 BPF register A
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* s4 BPF register X
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* s5 *skb
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* s6 *scratch memory
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* r_A BPF register A
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* r_X BPF register X
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* r_skb *skb
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* r_M *scratch memory
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*
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* On entry (*bpf_func)(*skb, *filter)
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* a0 = MIPS_R_A0 = skb;
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