[Bug gold/20878] gold powerpc64 le linux fails to link large Linux kernel

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20878

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2016-12-06
           Assignee|ccoutant at gmail dot com          |amodra at gmail dot com
     Ever confirmed|0                           |1

--- Comment #4 from Alan Modra <amodra at gmail dot com> ---
This one is a real pain.  It's due to gold adding stubs at the end of a section
rather than as ld.bfd does, in a separate section inserted just before one of
the group sections.  I think I need to rewrite the powerpc.cc group_sections
code, throwing out --stub-group-size negative meaning that the stubs are always
before the branch and switch to --stub-group-size negative meaning that the
stubs are always *after* the branch.  The problem is that if we want stubs
before branches, then the stubs must be added to the previous section.  Adding
to the previous section is a disaster if there is a large gap between the
previous section and the group.  That's exactly what happens with the kernel:
stubs are attached to a .meminit.text input section (last in output .text) for
the group of .init.text and .exit.text sections.

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