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

From: hjl.tools at gmail dot com
Subject: [Bug ld/16178] New: Sort reloc_class_ifunc doesn't work
Date: Sat, 16 Nov 2013 00:18:30 +0000


            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

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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