上图是x86 binutils 的流程图。

函数	说明
_bfd_x86_elf_link_hash_table_create	Init local STT_GNU_IFUNC symbol hash.
elf_x86_64_check_relocs	Add support for handling STT_GNU_IFUNC symbols
_bfd_elf_x86_get_local_sym_hash	Find and/or create a hash entry for local symbol
_bfd_x86_elf_adjust_dynamic_symbol	STT_GNU_IFUNC symbol must go through PLT.All local STT_GNU_IFUNC references must be treate as local calls via local PLT.
_bfd_x86_elf_size_dynamic_sections	Allocate .plt and .got entries, and space for local symbols
elf_x86_allocate_dynrelocs	Handle STT_GNU_IFUNC symbols
_bfd_x86_elf_local_htab_hash	Compute a hash of a local hash entry. We use elf_link_hash_entry for local symbol so that we can handle local STT_GNU_IFUNC symbols as global symbol. We reuse indx and dynstr _index for local symbol hash since they aren't used by global symbols in this backend.
_bfd_x86_elf_local_htab_eq	Compare local hash entries
_bfd_x86_elf_finish_dynamic_sections	Finish up the x86 dynamic sections.
elf_x86_link_hash_table_free	Free local STT_GNU_IFUNC symbol hash.
elf_x86_64_output_arch_local_syms	Fill PLT/GOT entries and allocate dynamic relocations for loal STT_GNU_IFUNC symbols.It has to be done before elf_link_sort_relocs is called so that dynamic relocations are properly sorted.
elf_x86_64_finish_local_dynamic_symbol	Finish up local dynamic symbol handling.
elf_x86_64_finish_dynamic_symbol	Finish up dynamic symbol handling.