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Age	Commit message (Collapse)	Author	Files	Lines
2020-01-15	PR25384, PowerPC64 ELFv1 copy relocs against function symbols	Alan Modra	1	-0/+1
	Function symbols of course don't normally want .dynbss copies but with some old versions of gcc they are needed to copy the function descriptor. This patch restricts the cases where they are useful to compilers using dot-symbols, and enables the warning regardless of whether a PLT entry is emitted in the executable. PLTs in shared libraries are affected by a .dynbss copy in the executable. bfd/ PR 25384 * elf64-ppc.c (ELIMINATE_COPY_RELOCS): Update comment. (ppc64_elf_adjust_dynamic_symbol): Don't allow .dynbss copies of function symbols unless dot symbols are present. Do warn whenever one is created, regardles of whether a PLT entry is also emitted for the function symbol. ld/ * testsuite/ld-powerpc/ambiguousv1b.d: Adjust expected output. * testsuite/ld-powerpc/funref.s: Align func_tab. * testsuite/ld-powerpc/funref2.s: Likewise. * testsuite/ld-powerpc/funv1.s: Add dot symbols.
2014-03-27	Referencing a function's address on PowerPC64 ELFv2	Alan Modra	1	-0/+4
	ELFv2 needs to create plt entries in a non-PIC executable for an address reference to a function defined in a shared object. It's possible that an object file has no features that distinguish it as ELFv1 or ELFv2, eg. an object only containing data. Such files need to be handled like those that are known to be ELFv2. However, this unnecessarily creates plt entries for the analogous ELFv1 case, so arrange to set output abi version earlier, and use the output abi version to further distinguish ambiguous input files. bfd/ * elf64-ppc.c (ppc64_elf_check_relocs): Account for possibly needed plt entries when taking the address of functions for abiversion == 0 (ie. unknown) as well as abiversion == 2. Move opd setup and abiversion checks to.. (ppc64_elf_before_check_relocs): ..here. Renamed from ppc64_elf_process_dot_syms. Set output abiversion from input and input abiversion from output, if either is not set. (ppc64_elf_merge_private_bfd_data): Don't merge flags here. (elf_backend_check_directives): Update. ld/testsuite/ * ld-powerpc/startv1.s, * ld-powerpc/startv2.s, * ld-powerpc/funref.s, * ld-powerpc/funv1.s, * ld-powerpc/funv2.s, * ld-powerpc/ambiguousv1.d, * ld-powerpc/ambiguousv2.d: New test files. * ld-powerpc/powerpc.exp: Run new tests.