hppa64: Fix handling of dynamic relocations

hppa64: Fix handling of dynamic relocations

This change fixes issues with dynamic relocations.  We now support
R_PARISC_FPTR64 relocations for local symbols for both LTOFF and
simple FPTR64 relocations.  Allocation of dynrel relocations is
revised along the lines of ia64.  OPDs are reduced in size to 16
bytes so .opd section is now identical to that generated by the
HP linker.

Small applications now link and run successfully on HP-UX but better
stub support is needed for executables larger than roughly 8 MB.
Many PCREL22F branches can't reach their target.  This prevents
building any recent version of gcc.

2025-11-16  John David Anglin  <danglin@gcc.gnu.org>

bfd/ChangeLog:

	* elf64-hppa.c (OPD_ENTRY_SIZE): Change to 16 bytes.
	(elf64_hppa_check_relocs): Revise maybe_dynamic calculation.
	Revise R_PARISC_FPTR64 case to request dynrel when hh is
	not NULL.  Add local symbols to local dynamic symbol table.
	Always add global symbols to dynamic symbol table when a
	dynrel may be needed.
	(allocate_global_data_opd): Update OPD entry allocation
	for reduced OPD size.
	(allocate_dynrel_entries): Rework along the lines of ia64.
	(elf64_hppa_late_size_sections): Revise DLT allocation.
	Revise OPD allocation.
	(elf64_hppa_finalize_opd): Revise for reduced OPD size.
	Remove unnecessary NULL check.
	(elf64_hppa_finalize_dlt): Remove unnecessary NULL check.
	(elf64_hppa_finalize_dynreloc): Rework along the lines of
	ia64.  Correct relocation handling.
	(elf_hppa_final_link_relocate): Don't zero first two words
	of OPD.  Update relocation handling to output EPLT and
	FPTR64 relocations for local symbols.