From 6cd255ca1f03550291bd05ac4548e383bca88c5f Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 21 Apr 2016 19:14:10 -0700 Subject: [PATCH] Set dynobj to a normal input file if possible When check_relocs is called after gc-sections has run, _bfd_elf_link_create_dynstrtab may be called with an dynamic object and hash_table->dynobj may be NULL. We may not set dynobj, an input file holding linker created dynamic sections to the dynamic object, which has its own dynamic sections. We need to find a normal input file to hold linker created sections if possible. Otherwise ld will crash during LTO input rescan when linker created dynamic section overrides input dynamic section. * elflink.c (_bfd_elf_link_create_dynstrtab): Set dynobj to a normal input file if possible. --- bfd/ChangeLog | 5 +++++ bfd/elflink.c | 18 +++++++++++++++++- 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 9793225..d668652 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,8 @@ +2016-04-21 H.J. Lu + + * elflink.c (_bfd_elf_link_create_dynstrtab): Set dynobj to a + normal input file if possible. + 2016-04-21 Nick Clifton * aout-adobe.c: Use _bfd_generic_link_check_relocs. diff --git a/bfd/elflink.c b/bfd/elflink.c index b432384..13233cb 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -204,7 +204,23 @@ _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) hash_table = elf_hash_table (info); if (hash_table->dynobj == NULL) - hash_table->dynobj = abfd; + { + /* We may not set dynobj, an input file holding linker created + dynamic sections to abfd, which may be a dynamic object with + its own dynamic sections. We need to find a normal input file + to hold linker created sections if possible. */ + if ((abfd->flags & (DYNAMIC | BFD_PLUGIN)) != 0) + { + bfd *ibfd; + for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) + if ((ibfd->flags & (DYNAMIC | BFD_PLUGIN)) == 0) + { + abfd = ibfd; + break; + } + } + hash_table->dynobj = abfd; + } if (hash_table->dynstr == NULL) { -- 2.7.4