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H A D | verifier.c | b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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> b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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>
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H A D | main.h | b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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> b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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>
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H A D | jit.c | b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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> b14157ee Mon Oct 23 13:58:13 CDT 2017 Jakub Kicinski <jakub.kicinski@netronome.com> 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>
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