We backported fixes for GCC PR63304 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63304) in our 2015.12 snapshot.
By default, GCC now uses adrp / ldr or adrp / add instructions to address the literal pools under the use of a command line option, and this mode is on by default. OTOH, CONFIG_ARM64_ERRATUM_843419 removes support for the related relocations from the kernel, hence the error you are seeing. Modifying arch/arm64/Makefile in the kernel sources to have: ifeq ($(CONFIG_ARM64_ERRATUM_843419), y) KBUILD_CFLAGS_MODULE += -mcmodel=large -mpc-relative-literal-loads endif makes the problem disappear. However, the -mpc-relative-literal-loads option is not recognized by GCC if it doesn't include the patch for GCC PR 63304, so it may not be easy to patch the Makefile. ** Bug watch added: GCC Bugzilla #63304 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63304 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1533009 Title: arm64: "unsupported RELA relocation" Status in Linaro GCC: Unknown Status in Linux: Unknown Status in gcc-5 package in Ubuntu: Confirmed Status in linux package in Ubuntu: Triaged Bug description: linux-image-4.3.0-5-generic 4.3.0-5.16 arm64 fails to load modules (and therefore boot). It emits messages like the following for each attempted module load: [ 2.156817] module libahci: unsupported RELA relocation: 275 This is reminiscent of LP: #1502946 - except that fix appears to still be in-tact. What has changed, however, is the build environment. If I rebuild the same kernel source in a wily chroot, it boots fine. Marking "Confirmed" because Paulo Pisatti reported this to me, and I reproduced. To manage notifications about this bug go to: https://bugs.launchpad.net/gcc-linaro/+bug/1533009/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
