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[Bug bpf/23860] unknown opcode 0x8f in string manipulation code
- From: "mark at klomp dot org" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Sun, 04 Nov 2018 15:45:45 +0000
- Subject: [Bug bpf/23860] unknown opcode 0x8f in string manipulation code
- Auto-submitted: auto-generated
- References: <bug-23860-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=23860
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
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CC| |mark at klomp dot org
--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
If I am decoding this correctly this would be BPF_ALU64 | BPF_NEG | BPF_X.
I am not sure that combination makes sense. I don't believe you can negate a
source operand. You seem to only be able to negate the dest operand (register).
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