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(parent: 2df03a5) | patch
nfp: bpf: support stack accesses via non-constant pointers
authorJakub Kicinski <jakub.kicinski@netronome.com>
Mon, 23 Oct 2017 18:58:13 +0000 (11:58 -0700)
committerDavid S. Miller <davem@davemloft.net>
Tue, 24 Oct 2017 08:38:37 +0000 (17:38 +0900)
commitb14157eeed4eff2b293e0ca7738f6a3dbfff51cc
tree058eb11cfc701cf182a17b1259de1868934cf419tree | snapshot
parent2df03a50f14ab6d888c212aa332536933ded040acommit | diff
nfp: bpf: support stack accesses via non-constant pointers

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>
drivers/net/ethernet/netronome/nfp/bpf/jit.c diff | blob | history
drivers/net/ethernet/netronome/nfp/bpf/main.h diff | blob | history
drivers/net/ethernet/netronome/nfp/bpf/verifier.c diff | blob | history
Domain: System / Kernel;