From: Alexei Starovoitov <a...@plumgrid.com> Date: Sat, 29 Nov 2014 14:46:13 -0800
> 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: 622582786c9e ("net: filter: x86: internal BPF JIT") > Signed-off-by: Alexei Starovoitov <a...@plumgrid.com> Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/