Hi - On Mon, Aug 03, 2020 at 01:11:27PM -0700, Kees Cook wrote: > [...] > > Systemtap needs to know base addresses of loaded text & data sections, > > in order to perform relocation of probe point PCs and context data > > addresses. It uses /sys/module/...., kind of under protest, because > > there seems to exist no MODULE_EXPORT'd API to get at that information > > some other way. > > Wouldn't /proc/kallsysms entries cover this? I must be missing > something... We have relocated based on sections, not some subset of function symbols accessible that way, partly because DWARF line- and DIE- based probes can map to addresses some way away from function symbols, into function interiors, or cloned/moved bits of optimized code. It would take some work to prove that function-symbol based heuristic arithmetic would have just as much reach. - FChE
