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authorAlan Modra <amodra@gmail.com>2016-12-29 22:49:41 +1030
committerAlan Modra <amodra@gmail.com>2016-12-29 23:56:54 +1030
commite81830c5c61a8665c098189d069cc68b0df113d3 (patch)
tree3fa10c6cc2cd921b4341168bca62d4df130e2ab1 /bfd/elf32-s390.c
parentffdc5f48ee608b4750df5e34c10598f0f2c158d3 (diff)
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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.
Diffstat (limited to 'bfd/elf32-s390.c')
-rw-r--r--bfd/elf32-s390.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c
index b52144a..ae8b5b9 100644
--- a/bfd/elf32-s390.c
+++ b/bfd/elf32-s390.c
@@ -873,7 +873,8 @@ elf_s390_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. */
- dir->ref_dynamic |= ind->ref_dynamic;
+ if (dir->versioned != versioned_hidden)
+ dir->ref_dynamic |= ind->ref_dynamic;
dir->ref_regular |= ind->ref_regular;
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
dir->needs_plt |= ind->needs_plt;