[Bug translator/32999] handle PIE executables with segments where file-offset is not vaddr

[lijunlong at openresty dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32999

--- Comment #5 from lijunlong <lijunlong at openresty dot com> ---

For ET_DYN, it will return *addr -= mod->low_addr;

int
dwfl_module_relocate_address (Dwfl_Module *mod, Dwarf_Addr *addr)
{
  if (unlikely (check_module (mod)))
    return -1;

  switch (mod->e_type)
    {
    case ET_REL:
      return find_section (mod, addr);

    case ET_DYN:
      /* All relative to first and only relocation base: module start.  */
      *addr -= mod->low_addr;
      break;

    default:
      /* Already absolute, dwfl_module_relocations returned zero.  We
         shouldn't really have been called, but it's a harmless no-op.  */
      break;
    }

  return 0;
}

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