binutils-gdb/ld/testsuite/ld-powerpc/dotsym2.d

#source: dotsymref.s
#source: nodotsym.s
#as: -a64
#ld: -melf64ppc -Ttext=0x10000000 -e foo
#objdump: -d

.*:     file format .*

Disassembly of section \.text:

0+10000000 <\.foo-0x8>:
.*:	(00 00 00 00|08 00 00 10) 	.*
.*:	(10 00 00 08|00 00 00 00) 	.*

0+10000008 <\.foo>:
.*:	(4e 80 00 20|20 00 80 4e) 	blr
PowerPC64 dot-symbol compatibility bugfixes Lots of fixes for the compatibility code that handles linking of -mcall-aixdesc code (or that generated by 12 year old gcc) with current ELFv1 ABI code. 1) A reference to a dot-symbol in an object file wasn't satisfied by a function descriptor in later object files. 2) The as-needed code had bit-rotted; Shared libs now need a strong reference to be counted as needed. 3) --gc-sections involving dot-symbols was broken, needing func_desc_adjust to be run early and lots of other fixes. bfd/ * elf64-ppc.c (struct ppc_link_hash_entry): Delete "was_undefined". (struct ppc_link_hash_table): Delete "twiddled_syms". Add "need_func_desc_adj". (lookup_fdh): Link direct fdh sym via oh field and set flags. (make_fdh): Make strong and weak undefined function descriptor symbols. (ppc64_elf_merge_symbol): New function. (elf_backend_merge_symbol): Define. (ppc64_elf_archive_symbol_lookup): Don't test undefweak for fake function descriptors. (add_symbol_adjust): Don't twiddle symbols to undefweak. Propagate more ref flags to function descriptor symbol. Make some function descriptor symbols dynamic. (ppc64_elf_before_check_relocs): Only run add_symbol_adjust for ELFv1. Set need_func_desc_adj. Don't fix undefs list. (ppc64_elf_check_relocs): Set non_ir_ref for descriptors. Don't call lookup_fdh here. (ppc64_elf_gc_sections): New function. (bfd_elf64_bfd_gc_sections): Define. (ppc64_elf_gc_mark_hook): Mark descriptor. (func_desc_adjust): Don't make fake function descriptor syms strong here. Exit earlier on non-dotsyms. Take note of elf.dynamic flag when deciding whether a dynamic function descriptor might be needed. Transfer elf.dynamic and set elf.needs_plt. Move plt regardless of visibility. Make descriptor dynamic if entry sym is dynamic, not for other cases. (ppc64_elf_func_desc_adjust): Don't run func_desc_adjust if already done. (ppc64_elf_edit_opd): Use oh field rather than lookup_fdh. (ppc64_elf_size_stubs): Likewise. (ppc_build_one_stub): Don't clear was_undefined. Only set sym undefweak if stub symbol is defined. (undo_symbol_twiddle, ppc64_elf_restore_symbols): Delete. * elf64-ppc.h (ppc64_elf_restore_symbols): Don't declare. ld/ * emultempl/ppc64elf.em (gld${EMULATION_NAME}_finish): Don't call ppc64_elf_restore_symbols. * testsuite/ld-powerpc/dotsym1.d: New. * testsuite/ld-powerpc/dotsym2.d: New. * testsuite/ld-powerpc/dotsym3.d: New. * testsuite/ld-powerpc/dotsym4.d: New. * testsuite/ld-powerpc/dotsymref.s: New. * testsuite/ld-powerpc/nodotsym.s: New. * testsuite/ld-powerpc/powerpc.exp: Run new tests. 2016-12-03 18:30:01 +08:00			`#source: dotsymref.s`
			`#source: nodotsym.s`
			`#as: -a64`
			`#ld: -melf64ppc -Ttext=0x10000000 -e foo`
			`#objdump: -d`

			`.: file format .`

			`Disassembly of section \.text:`

			`0+10000000 <\.foo-0x8>:`
			`.: (00 00 00 00\|08 00 00 10) .`
			`.: (10 00 00 08\|00 00 00 00) .`

			`0+10000008 <\.foo>:`
			`.*: (4e 80 00 20\|20 00 80 4e) blr`