Michael Holzheu b035b60ded s390/bpf: Fix backward jumps ... Currently all backward jumps crash for JITed s390x eBPF programs with an illegal instruction program check and kernel panic. Because for negative values the opcode of the jump instruction is overriden by the negative branch offset an illegal instruction is generated by the JIT: 000003ff802da378: c01100000002 lgfi %r1,2 000003ff802da37e: fffffff52065 unknown <-- illegal instruction 000003ff802da384: b904002e lgr %r2,%r14 So fix this and mask the offset in order not to damage the opcode. Cc: stable@vger.kernel.org # 4.0+ Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2015-06-25 09:39:18 +02:00
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Makefile	s390/bpf,jit: BPF Just In Time compiler for s390	2012-09-26 15:44:49 +02:00
bpf_jit.S	s390/bpf: Add s390x eBPF JIT compiler backend	2015-04-15 12:23:49 +02:00
bpf_jit.h	s390/bpf: implement bpf_tail_call() helper	2015-06-09 11:47:10 -07:00
bpf_jit_comp.c	s390/bpf: Fix backward jumps	2015-06-25 09:39:18 +02:00