https://sourceware.org/bugzilla/show_bug.cgi?id=26655
Bug ID: 26655
Summary: Power10 libstdc++.so R_PPC64_NONE dynamic relocs
Product: binutils
Version: 2.36 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: amodra at gmail dot com
Target Milestone: ---
A recent build of gcc for power10 gave me a libstdc++.so with 87 R_PPC64_NONE
dynamic relocations, all due to allocating GOT entries that are never used.
The GOT entries correspond to R_PPC64_GOT_PCREL34 relocs for symbols that turn
out to be local in the output. They are made local by code near the end of
_bfd_elf_link_assign_sym_version, which is called by
bfd_elf_size_dynamic_sections. The problem is that ppc64_elf_edit_toc, the
code that decides whether GOT entries can be eliminated, is run before
bfd_elf_size_dynamic_sections, and at that stage the symbols in question are
dynamic, needing GOT entries. However, we do want ppc64_elf_edit_toc to run
before sizing dynamic sections as obviously the size of .got changes if
ppc64_elf_edit_toc removes the need for a GOT entry.
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