link_hash_copy_indirect and symbol flags

A while ago HJ fixed PR ld/18720 with commit 6e33951ed, which, among
other things, modified _bfd_elf_link_hash_copy_indirect to not copy
ref_dynamic, ref_regular, ref_regular_nonweak, non_got_ref, needs_plt
and pointer_equality_needed when setting up an indirect non-versioned
symbol pointing to a non-default versioned symbol.  I didn't notice at
the time, but the pr18720 testcase fails on hppa-linux with
"internal error, aborting at binutils-gdb-2.28/bfd/elf32-hppa.c:3933
in elf32_hppa_relocate_section".

Now hppa-linux creates entries in the plt even for local functions, if
they are referenced using plabel (function pointer) relocations.   So
needs_plt is set for foo when processing pr18720a.o.  When the aliases
in pr28720b.o are processed, we get an indirection from foo to
foo@FOO, but don't copy needs_plt.  Since foo@FOO is the "real" symbol
that is used after that point, no plt entry is made for foo and we
bomb when relocating the plabel.

As shown by the hppa-linux scenario, needs_plt should be copied even
for non-default versioned symbols.  I believe all of the others ought
to be copied too, with the exception of ref_dynamic.  Not copying
ref_dynamic is right because if a shared lib references "foo" it
should not be satisfied by any non-default version "foo@FOO".

	* elflink.c (_bfd_elf_link_hash_copy_indirect): Only omit
	copying one flag, ref_dynamic, when versioned_hidden.
	* elf64-ppc.c (ppc64_elf_copy_indirect_symbol): Likewise.
	* elf32-hppa.c (elf32_hppa_copy_indirect_symbol): Use same
	logic for copying weakdef flags.  Copy plabel flag and merge
	tls_type.
	* elf32-i386.c (elf_i386_copy_indirect_symbol): Use same logic
	for copying weakdef flags.
	* elf32-ppc.c (ppc_elf_copy_indirect_symbol): Likewise.
	* elf32-s390.c (elf_s390_copy_indirect_symbol): Likewise.
	* elf32-sh.c (sh_elf_copy_indirect_symbol): Likewise.
	* elf64-s390.c (elf_s390_copy_indirect_symbol): Likewise.
	* elfnn-ia64.c (elfNN_ia64_hash_copy_indirect): Likewise.
	* elf64-x86-64.c (elf_x86_64_copy_indirect_symbol): Likewise.
	Simplify.

1 files changed, 8 insertions, 7 deletions

diff --git a/bfd/elf32-hppa.c b/bfd/elf32-hppa.c
index cbe42cf..eab384b 100644
--- a/bfd/elf32-hppa.c
+++ b/bfd/elf32-hppa.c
@@ -1056,19 +1056,20 @@ elf32_hppa_copy_indirect_symbol (struct bfd_link_info *info,
       /* If called to transfer flags for a weakdef during processing
 	 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 	 We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
-      eh_dir->ref_dynamic |= eh_ind->ref_dynamic;
+      if (eh_dir->versioned != versioned_hidden)
+	eh_dir->ref_dynamic |= eh_ind->ref_dynamic;
       eh_dir->ref_regular |= eh_ind->ref_regular;
       eh_dir->ref_regular_nonweak |= eh_ind->ref_regular_nonweak;
       eh_dir->needs_plt |= eh_ind->needs_plt;
     }
   else
     {
-      if (eh_ind->root.type == bfd_link_hash_indirect
-          && eh_dir->got.refcount <= 0)
-        {
-          hh_dir->tls_type = hh_ind->tls_type;
-          hh_ind->tls_type = GOT_UNKNOWN;
-        }
+      if (eh_ind->root.type == bfd_link_hash_indirect)
+	{
+	  hh_dir->plabel |= hh_ind->plabel;
+	  hh_dir->tls_type |= hh_ind->tls_type;
+	  hh_ind->tls_type = GOT_UNKNOWN;
+	}
 
       _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind);
     }