nfp: bpf: allow stack accesses via modified stack registers

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As long as the verifier tells us the stack offset exactly we
can render the LMEM reads quite easily.  Simply make sure that
the offset is constant for a given instruction and add it to
the instruction's offset.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jakub Kicinski 2017-10-23 11:58:11 -07:00 • committed by David S. Miller

parent 9a90c83c09

commit d348848063

3 changed files with 33 additions and 17 deletions

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23

drivers/net/ethernet/netronome/nfp/bpf/jit.c

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3

drivers/net/ethernet/netronome/nfp/bpf/main.h

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24

drivers/net/ethernet/netronome/nfp/bpf/verifier.c

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