On Thu, Sep 04, 2025 at 11:27:45AM -0700, Andrii Nakryiko wrote: > > > So I've been thinking what's the simplest and most reliable way to > > > feature-detect support for this sys_uprobe (e.g., for libbpf to know > > > whether we should attach at nop5 vs nop1), and clearly that would be > > > > wrt nop5/nop1.. so the idea is to have USDT macro emit both nop1,nop5 > > and store some info about that in the usdt's elf note, right? Wait, what? You're doing to emit 6 bytes and two nops? Why? Surely the old kernel can INT3 on top of a NOP5?
