[Bug gold/25617] New: Gold looks up shared object information in section headers instead of the dynamic array

[klkblake at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25617

            Bug ID: 25617
           Summary: Gold looks up shared object information in section
                    headers instead of the dynamic array
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: klkblake at gmail dot com
                CC: ian at airs dot com
  Target Milestone: ---

For shared objects, all information needed for linking is in the dynamic array,
and section headers are optional. However, gold looks up the information it
needs in the (optional) section headers instead of the (mandatory) dynamic
array, and fails if the section headers are not present. As a result, gold is
unable to link to shared objects with no section headers, even though such
shared objects are spec-compliant and the dynamic linker can load them without
issue.

This is unfortunate, as working around it requires redundantly respecifying
most of the dynamic array in section headers.

This seems like it should not be too hard to fix, from what I've seen of gold's
shared object handling, but I'm not particularly familiar with the codebase so
I don't know if there are things I'm missing.

The BFD-based linker also exhibits this issue.

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