[PR22764][LD][AARCH64]Allow R_AARCH64_ABS16 and R_AARCH64_ABS32 against absolution symbol or undefine symbol in shared object under LP64 abi.

[Nick Clifton]

Hi Renlin,

> Regarding for the indirect symbol case you pointed out,
> I saw the following code in elfNN_aarch64_check_relocs ()
> 
>> Â Â Â Â Â  if (r_symndx < symtab_hdr->sh_info)
>> Â Â Â Â {
>>       /* A local symbol.  */
>> Â Â Â Â Â  ...
>> Â Â Â Â }
>> Â Â Â Â Â  else
>> Â Â Â Â {
>> Â Â Â Â Â  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
>> Â Â Â Â Â  while (h->root.type == bfd_link_hash_indirect
>> Â Â Â Â Â Â Â Â  || h->root.type == bfd_link_hash_warning)
>> Â Â Â Â Â Â Â  h = (struct elf_link_hash_entry *) h->root.u.i.link;
>> Â Â Â Â }
> 
> This is done before the check happens.
> Does this mean, h is already been processed to points to final symbol?

Yes. :-)  [I should have looked further back in the code when I was reviewing the patch].

Cheers
  Nick