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    SubjectRe: Urgent: x86-32 and GNU ld 2.22.52.0.1
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    On Fri, May 18, 2012 at 9:14 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
    > On Fri, May 18, 2012 at 8:56 AM, H. Peter Anvin <hpa@zytor.com> wrote:
    >> I need an urgent opinion.  It seems we have an epic mess on our hands.
    >>
    >> GNU ld 2.22.52.0.1 silently changed the semantics of section-relative
    >> symbols that are part of otherwise empty sections, and silently changes
    >> them to absolute.  We rely on section-relative symbols staying
    >> section-relative, and actually have several sections in the linker
    >> script solely for this purpose.
    >
    > That is I talked to you a couple days ago:
    >
    > http://sourceware.org/bugzilla/show_bug.cgi?id=14052
    >
    >> The postprocessor for the x86-32 kernel, relocs.c, currently doesn't
    >> enforce its audited absolute symbols list.  As part of the
    >> tip:x86/trampoline rework, however, I made it error out rather that
    >> silently producing bad output.
    >>
    >> Ingo has found that with this particular version of GNU ld, the error
    >> triggers.  I want to emphasize that this merely catches an error which
    >> the current version of the tool would have allowed to silently go by,
    >> which would have (possibly) caused a failure if the kernel was
    >> subsequently booted in anything but its default location.
    >>
    >> There are a few ways we can deal with this, but I think we need to do
    >> one or the other:
    >>
    >> 1. We can blacklist this version of GNU ld.
    >
    > I think this is the best approach.
    >

    Please verify that binutils 2.22.52.0.2 is broken
    and binutils 2.22.52.0.1 is OK.


    --
    H.J.
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