JDK-8016696 : PPC64 (part 4): add relocation for trampoline stubs
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: port-stage-ppc-aix
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: ppc
  • Submitted: 2013-06-14
  • Updated: 2016-10-24
  • Resolved: 2013-07-08
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JDK 8 JDK 9 Other
8u20Fixed 9Fixed openjdk7u,port-stage-ppc-aixFixed
Description
This is preparation for PPC64 integration: http://openjdk.java.net/jeps/175
This and following ppc64 changes will go into staging repository first and tested there: http://hg.openjdk.java.net/ppc-aix-port/stage/

A trampoline allows to encode a small branch in the code, even if there
is the chance that this branch can not reach all possible code locations.
If the relocation finds that a branch is too far for the instruction
in the code, it can patch it to jump to the trampoline where is
sufficient space for a far branch.  Needed on PPC64.

http://hg.openjdk.java.net/ppc-aix-port/jdk8/hotspot/file/df79d76c17ab/ppc_patches/0004_opto-trampoline_relocations.patch
Comments
Author: goetz Date: 2013-07-04 10:51 +0200 URL: http://hg.openjdk.java.net/ppc-aix-port/stage/hotspot/rev/53fa76359eb1
08-07-2013
http://cr.openjdk.java.net/~goetz/webrevs/8016696-trampoline/
21-06-2013