[Bug binutils/29718] New: readelf prints out "<OS specific>: 10" instead of "IFUNC"

[rui314 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29718

            Bug ID: 29718
           Summary: readelf prints out "<OS specific>: 10" instead of
                    "IFUNC"
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: rui314 at gmail dot com
  Target Milestone: ---

readelf doesn't pretty print symbol type of STT_GNU_IFUNC unless ELF header's
EI_OSABI is set to ELFOSABI_GNU. Instead of "IFUNC", it prints out "<OS
specific>:10".

Technically, GNU IFUNC is indeed a GNU extension, but all systems I know of do
not require EI_OSABI to be set to ELFOSABI_GNU, so it is effectively a
globally-reserved number. Given the situation, LLVM lld and mold do not bother
to set EI_OSABI.

Could you make a change to readelf so that it always pretty-prints symbol type
10 for all ELF OSABIs?

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