[Bug ld/16178] New: Sort reloc_class_ifunc doesn't work

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=16178

            Bug ID: 16178
           Summary: Sort reloc_class_ifunc doesn't work
           Product: binutils
           Version: 2.25 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: amodra at gmail dot com

reloc_class_ifunc is added to put the IRELATIVE relocations
at the end of dynamic relocation table.  There are 2
problems:

1. elf_link_sort_relocs is called with

  if (dynamic && info->combreloc && dynobj != NULL) 
    relativecount = elf_link_sort_relocs (abfd, info, &reldyn);

If -z comreloc isn't used, sorting is off.

2. elf_link_sort_relocs only deals with .rel.dyn and .rela.dyn.
But some backends put IRELATIVE relocations in .rel.plt or
.rela.plt, regardless if -z comreloc is used.  So reloc_class_ifunc
does nothing.

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