[Bug 1533009] Re: arm64: "unsupported RELA relocation"

[Ming Lei]

Dann,

In my test, the issue is nothing to do with kernel, and only related
with modules built by the affected gcc 5.3.

For example, the kernel running is built from gcc 5.2, then I rebuilt some modules by gcc 5.3, the issue comes
when I try to load the just built module.

BTW, '-mcmodel=large' is only passed to gcc when modules are builting,
and it isn't used for building kernel.


Thanks,

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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.

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