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[Bug bpf/23860] unknown opcode 0x8f in string manipulation code
- From: "me at serhei dot io" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Mon, 05 Nov 2018 22:01:40 +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
Serhei Makarov <me at serhei dot io> changed:
What |Removed |Added
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CC| |me at serhei dot io
--- Comment #2 from Serhei Makarov <me at serhei dot io> ---
This was a minor bug in program::mk_unary().
BPF_NEG indeed doesn't fit the pattern for eBPF opcodes: there is no src and
BPF_X is not used even though the disassembly says 'negx'.
Incorrect opcode should be fixed in commit 72ef87bba, but there's another
underlying issue preventing the example from working ('invalid memory access'
according to verifier). Not closing yet.
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