On Thu, Feb 25, 2016 at 11:48:59AM +1100, Balbir Singh wrote:
> > @@ -608,6 +621,9 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
> > return -ENOENT;
> > if (!restore_r2((u32 *)location + 1, me))
> > return -ENOEXEC;
> > + /* Squash the TOC saver for profiler calls */
> > + if (!strcmp("_mcount", strtab+sym->st_name))
> > + SQUASH_TOC_SAVE_INSN(value);
> I don't think we need this anymore, do we?
I'm not sure. Once a module is loaded, are all the "bl _mcount"s NOPed out
before any of its functions are run? If not, the _mcount trampoline will
be used, and it must not save R2!
Torsten
--
To unsubscribe from this list: send the line "unsubscribe live-patching" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
