1. 21 Jan, 2016 2 commits
    • Alan Modra's avatar
      powerpc: Simplify module TOC handling · c153693d
      Alan Modra authored
      PowerPC64 uses the symbol .TOC. much as other targets use
      _GLOBAL_OFFSET_TABLE_. It identifies the value of the GOT pointer (or in
      powerpc parlance, the TOC pointer). Global offset tables are generally
      local to an executable or shared library, or in the kernel, module. Thus
      it does not make sense for a module to resolve a relocation against
      .TOC. to the kernel's .TOC. value. A module has its own .TOC., and
      indeed the powerpc64 module relocation processing ignores the kernel
      value of .TOC. and instead calculates a module-local value.
      
      This patch removes code involved in exporting the kernel .TOC., tweaks
      modpost to ignore an undefined .TOC., and the module loader to twiddle
      the section symbol so that .TOC. isn't seen as undefined.
      
      Note that if the kernel was compiled with -msingle-pic-base then ELFv2
      would not have function global entry code setting up r2. In that case
      the module call stubs would need to be modified to set up r2 using the
      kernel .TOC. value, requiring some of this code to be reinstated.
      
      mpe: Furthermore a change in binutils master (not yet released) causes
      the current way we handle the TOC to no longer work when building with
      MODVERSIONS=y and RELOCATABLE=n. The symptom is that modules can not be
      loaded due to there being no version found for TOC.
      
      Cc: stable@vger.kernel.org # 3.16+
      Signed-off-by: default avatarAlan Modra <amodra@gmail.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      c153693d
    • Chandan Rajendra's avatar
      powerpc: Wire up copy_file_range() syscall · d7f9ee60
      Chandan Rajendra authored
      Test runs on a ppc64 BE guest succeeded using modified fstests.
      
      Also tested on ppc64 LE using a home made test - mpe.
      Signed-off-by: default avatarChandan Rajendra <chandan@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      d7f9ee60
  2. 20 Jan, 2016 24 commits
  3. 19 Jan, 2016 14 commits