From: Alexei Starovoitov <a...@plumgrid.com>
Date: Mon, 1 Jun 2015 22:48:35 -0700
> From: Michael Holzheu <holz...@linux.vnet.ibm.com>
>
> Currently the bpf frame pointer is set to the old r15. This is
> wrong because of packed stack. Fix this and adjust the frame pointer
> to respect packed stack. This now generates a prolog like the following:
>
> 3ff8001c3fa: eb67f0480024 stmg %r6,%r7,72(%r15)
> 3ff8001c400: ebcff0780024 stmg %r12,%r15,120(%r15)
> 3ff8001c406: b904001f lgr %r1,%r15 <- load backchain
> 3ff8001c40a: 41d0f048 la %r13,72(%r15) <- load adjusted bfp
> 3ff8001c40e: a7fbfd98 aghi %r15,-616
> 3ff8001c412: e310f0980024 stg %r1,152(%r15) <- save backchain
>
> Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend")
> Signed-off-by: Michael Holzheu <holz...@linux.vnet.ibm.com>
> Acked-by: Heiko Carstens <heiko.carst...@de.ibm.com>
> Signed-off-by: Alexei Starovoitov <a...@plumgrid.com>
Applied.
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