[Bug symtab/17064] New: gdb's can't find Linux 3.16-rc1's vdso build-id

["luto at mit dot edu" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17064

            Bug ID: 17064
           Summary: gdb's can't find Linux 3.16-rc1's vdso build-id
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: luto at mit dot edu

In Linux 3.16-rc1, the vdso is more heavily stripped than it is in prior
versions.  It has no section table*.  Nonetheless, gdb should still be able to
find its build-id, because its PT_NOTE phdr is in perfect order.  eu-readelf -n
works, but readelf -n does not.

(Actually, there's a complication: due to a workaround for a bug in Go, the
64-bit vdso currently has a fake section header that does not contain a note
section.  This causes even elfutils to be unable to find the ELF notes.  If
necessary, I can change that.)

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