touch-packages team mailing list archive

[Peter Bergner <1463836@xxxxxxxxxxxxxxxxxx>]

Here is a minimal test case extracted from swsusp_asm64.s:

bergner@genoa:~/binutils/BUGS$ cat tlbie.s 
	.text
	tlbie %r4

bergner@genoa:~/binutils/BUGS$ /home/bergner/binutils/build/binutils-2_25/gas/as-new -a64 -mpower7 tlbie.s 
tlbie.s: Assembler messages:
tlbie.s:2: Error: missing operand

In ISA 2.06 (ie, POWER7), the tlbie instruction was changed from:

        tlbie RB,L     # Where L = 0 or 1 and "tlbie RB" is an extended mnemonic for "tlbie RB,0"
to
        tlbie RB,RS

The assembler was recently changed to accept the "tlbie RB,RS" variant
so that is why we are seeing the error now and not before, but I believe
it is correct that the assembler error out on this, as the tlbie
instruction really did change.  I believe the correct "fix" for this is
going to take a kernel source change.  Whether that is to setup and pass
RS to the tlbie or whether we should use tlbiel instead, I'm not sure.
I'll ping our kernel team and see what they say.

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https://bugs.launchpad.net/bugs/1463836

Title:
  4.0 kernel build failure on ppc64el

Status in binutils package in Ubuntu:
  New

Bug description:
  We have uploaded our first 4.0 based Wily kernel to the archive but
  are unfortunately seeing the following build failure which we believe
  is related to our wily toolchain:

  https://launchpadlibrarian.net/208665203/buildlog_ubuntu-wily-
  ppc64el.linux_4.0.0-1.1_BUILDING.txt.gz

  /build/buildd/linux-4.0.0/arch/powerpc/kernel/swsusp_asm64.S: Assembler messages:
  /build/buildd/linux-4.0.0/arch/powerpc/kernel/swsusp_asm64.S:188: Error: missing operand
  /build/buildd/linux-4.0.0/scripts/Makefile.build:294: recipe for target 'arch/powerpc/kernel/swsusp_asm64.o' failed
  make[3]: *** [arch/powerpc/kernel/swsusp_asm64.o] Error 1
  /build/buildd/linux-4.0.0/Makefile:957: recipe for target 'arch/powerpc/kernel' failed
  make[2]: *** [arch/powerpc/kernel] Error 2

  We do not believe this is due to a kernel change as the code in
  question has not changed in years.  Additionally, we had 4.0 based
  test builds successfully passing in our PPA (ppa:canonical-kernel-
  team/ppa).  The last successful test build in our PPA was from May 21
  (the logs are still there if needed).  We were also unable to
  reproduce by cross-compiling.

  As added information, our wily kernel git repo can be seen at:

  https://git.launchpad.net/~ubuntu-
  kernel/ubuntu/+source/linux/+git/wily

  Let us know if any additional information is required to debug this.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: binutils 2.25-8ubuntu1
  ProcVersionSignature: Ubuntu 4.0.0-1.1-generic 4.0.5
  Uname: Linux 4.0.0-1-generic x86_64
  ApportVersion: 2.17.3-0ubuntu4
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Jun 10 06:16:10 2015
  Dependencies:
   gcc-5-base 5.1.1-9ubuntu2
   libc6 2.21-0ubuntu4
   libgcc1 1:5.1.1-9ubuntu2
   multiarch-support 2.21-0ubuntu4
   zlib1g 1:1.2.8.dfsg-2ubuntu1
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-03-17 (449 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140317)
  SourcePackage: binutils
  UpgradeStatus: Upgraded to wily on 2015-05-28 (12 days ago)

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