Alexei Starovoitov 769e0de647 bpf: x86: fix epilogue generation for eBPF programs ... classic BPF has a restriction that last insn is always BPF_RET. eBPF doesn't have BPF_RET instruction and this restriction. It has BPF_EXIT insn which can appear anywhere in the program one or more times and it doesn't have to be last insn. Fix eBPF JIT to emit epilogue when first BPF_EXIT is seen and all other BPF_EXIT instructions will be emitted as jump. Since jump offset to epilogue is computed as: jmp_offset = ctx->cleanup_addr - addrs[i] we need to change type of cleanup_addr to signed to compute the offset as: (long long) ((int)20 - (int)30) instead of: (long long) ((unsigned int)20 - (int)30) Fixes: 622582786c ("net: filter: x86: internal BPF JIT") Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-12-05 21:23:54 -08:00
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bpf_jit_comp.c	bpf: x86: fix epilogue generation for eBPF programs	2014-12-05 21:23:54 -08:00
bpf_jit.S	net: filter: x86: internal BPF JIT	2014-05-15 16:31:30 -04:00
Makefile	net: filter: Just In Time compiler for x86-64	2011-04-27 23:05:08 -07:00