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linux/arch/s390/net
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Ilya Leoshkevich db7bee6538 s390/bpf: Fix optimizing out zero-extensions 
Currently the JIT completely removes things like `reg32 += 0`,
however, the BPF_ALU semantics requires the target register to be
zero-extended in such cases.

Fix by optimizing out only the arithmetic operation, but not the
subsequent zero-extension.

Reported-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Fixes: 0546231057 ("s390/bpf: Add s390x eBPF JIT compiler backend")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
History 2021-09-16 10:39:55 +02:00
..
bpf_jit.h bpf, s390x: remove ld_abs/ld_ind 2018-05-03 16:49:20 -07:00
bpf_jit_comp.c s390/bpf: Fix optimizing out zero-extensions 2021-09-16 10:39:55 +02:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
pnet.c s390/net: convert pnetids to ascii 2019-02-21 10:34:37 -08:00