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: 054623105728 ("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>

2021-09-16 10:39:55 +02:00

..

bpf_jit_comp.c

s390/bpf: Fix optimizing out zero-extensions

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

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