[PATCH] D71803: [llvm-nm] Display STT_GNU_IFUNC as 'i'

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

In D71803#1801067 <https://reviews.llvm.org/D71803#1801067>, @jhenderson wrote:

> I guess this isn't a real-world use case, but did you consider testing the interaction between STB_GNU_UNIQUE and STT_GNU_IFUNC? For all other types, the unique binding trumped the type, so seeing it different is a little odd.


`binutils-gdb/bfd/syms.c:bfd_decode_symclass`

    if (symbol->flags & BSF_GNU_INDIRECT_FUNCTION)
      return 'i';
    if (symbol->flags & BSF_WEAK)
      {
        /* If weak, determine if it's specifically an object
  	 or non-object weak.  */
        if (symbol->flags & BSF_OBJECT)
  	return 'V';
        else
  	return 'W';
      }
    if (symbol->flags & BSF_GNU_UNIQUE)
      return 'u';

Our rule matches GNU nm.

With regard to the interaction, `STB_GNU_UNIQUE` describes a property of a data symbol, while `STT_GNU_IFUNC` describes a property of a function symbol. So they cannot be mixed.


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https://reviews.llvm.org/D71803