On Thu, Sep 03, 2020 at 03:11:54PM -0700, Kees Cook wrote: > On Thu, Sep 03, 2020 at 01:30:35PM -0700, Sami Tolvanen wrote: > > With CONFIG_MODVERSIONS, version information is linked into each > > compilation unit that exports symbols. With LTO, we cannot use this > > method as all C code is compiled into LLVM bitcode instead. This > > change collects symbol versions into .symversions files and merges > > them in link-vmlinux.sh where they are all linked into vmlinux.o at > > the same time. > > > > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> > > The only thought I have here is I wonder if this change could be made > universally instead of gating on LTO? (i.e. is it noticeably slower to > do it this way under non-LTO?) I don't think it's noticeably slower, but keeping the version information in object files when possible is cleaner, in my opinion. Sami
