On 2016.12.19 at 17:52 +0100, Markus Trippelsdorf wrote: > On 2016.12.19 at 17:18 +0100, Markus Trippelsdorf wrote: > > Running the latest kernel git tree, I get buffer overflow warnings when > > I try to run "perf top": > > > > *** buffer overflow detected ***: /usr/src/linux/tools/perf/perf terminated > > > > It only happens when I link my kernel with gold. > > (with ld.bfd) > markus@x4 linux % readelf -n vmlinux > > Displaying notes found in: .notes > Owner Data size Description > GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID > bitstring) > Build ID: 74b478c2194c0ba07481acf30f6f8781d4ffcdee > > (with ld.gold) > markus@x4 linux % readelf -n vmlinux > > Displaying notes found in: .note.gnu.build-id > Owner Data size Description > GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID > bitstring) > Build ID: 017ef6e6f8ce3b44332d0baa0767526bb3a77bf8 > > Displaying notes found in: .note.gnu.gold-version > Owner Data size Description > GNU 0x00000009 NT_GNU_GOLD_VERSION (gold version) > Version: gold 1.12 > > And perf than chokes when parsing /sys/kernel/notes.
Started with gold commit: commit bfbf34de2f27672282d4fa4c0916cc41890dcc6c Author: Cary Coutant <[email protected]> Date: Mon Dec 12 18:51:29 2016 -0800 When using linker scripts, place linker-generated sections by the output section name. I've opened a gold bug: https://sourceware.org/bugzilla/show_bug.cgi?id=20983 -- Markus
