nfp: bpf: support stack accesses via non-constant pointers

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If stack pointer has a different value on different paths
but the alignment to words (4B) remains the same, we can
set a new LMEM access pointer to the calculated value and
access whichever word it's pointing to.

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 11:58:13 -07:00 • committed by David S. Miller

parent 2df03a50f1

commit b14157eeed

3 changed files with 45 additions and 10 deletions

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41

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

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2

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

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12

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

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