nfp: bpf: add helper for validating stack pointers

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Our implementation has restriction on stack pointers for function
calls.  Move the common checks into a helper for reuse.  The state
has to be encapsulated into a structure to support parameters
other than BPF_REG_2.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

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Jakub Kicinski 2018-03-28 17:48:29 -07:00 • committed by Alexei Starovoitov

parent fc4484970e

commit 2f46e0c127

3 changed files with 50 additions and 27 deletions

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4

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

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14

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

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59

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

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