On Wed, Feb 08, 2023 at 05:26:34PM +0000, Dave Thaler wrote: > David Vernet wrote: > > > +Reserved instructions > > > +==================== > > > > small nit: Missing a = > > Ack. > > > > +Clang will generate the reserved ``BPF_CALL | BPF_X | BPF_JMP`` (0x8d) > > instruction if ``-O0`` is used. > > > > Are we calling this out here to say that BPF_CALL in clang -O0 builds is not > > supported? That would seem to be the case given that we say that BPF_CALL > > | BPF_X | BPF_JMP in reserved and not permitted in instruction-set.rst. > > Yes, exactly. I could update the language to add something like > "... so BPF_CALL in clang -O0 builds is not supported". Gotcha, that sounds good to me. Thanks for being so thorough in documenting all of this tribal knowledge.
