From 78e8a2ff5f01799874be41fdc919d34c670496c6 Mon Sep 17 00:00:00 2001 From: "Jose E. Marchesi" Date: Tue, 6 Jun 2017 11:19:06 -0700 Subject: [PATCH] bfd: support section groups with preceding SHF_GROUP sections GAS always places section groups (SHT_GROUP) before the rest of the sections in the output file. However, other assemblers may place section groups after the group members. This patch fixes handlign such situations, and removes some duplicated logic. bfd/ChangeLog: 2017-06-06 Jose E. Marchesi * elf.c (setup_group): Make sure BFD sections are created for all group sections in the input file when processing SHF_GROUP sections. (bfd_section_from_shdr): Avoid duplicating logic already implemented in `setup_group'. --- bfd/ChangeLog | 8 ++++++++ bfd/elf.c | 33 +++++---------------------------- 2 files changed, 13 insertions(+), 28 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 4992fd1..b828633 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,11 @@ +2017-06-06 Jose E. Marchesi + + * elf.c (setup_group): Make sure BFD sections are created for all + group sections in the input file when processing SHF_GROUP + sections. + (bfd_section_from_shdr): Avoid duplicating logic already + implemented in `setup_group'. + 2017-06-06 Daniel Bonniot de Ruisselet PR binutils/21546 diff --git a/bfd/elf.c b/bfd/elf.c index bab1e16..fb106e9 100644 --- a/bfd/elf.c +++ b/bfd/elf.c @@ -636,6 +636,11 @@ setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect) unsigned char *src; Elf_Internal_Group *dest; + /* Make sure the group section has a BFD section + attached to it. */ + if (!bfd_section_from_shdr (abfd, i)) + return FALSE; + /* Add to list of sections. */ elf_tdata (abfd)->group_sect_ptr[num_group] = shdr; num_group += 1; @@ -2421,34 +2426,6 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex) if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) goto fail; - if (hdr->contents != NULL) - { - Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents; - unsigned int n_elt = hdr->sh_size / sizeof (* idx); - asection *s; - - if (n_elt == 0) - goto fail; - if (idx->flags & GRP_COMDAT) - hdr->bfd_section->flags - |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; - - /* We try to keep the same section order as it comes in. */ - idx += n_elt; - - while (--n_elt != 0) - { - --idx; - - if (idx->shdr != NULL - && (s = idx->shdr->bfd_section) != NULL - && elf_next_in_group (s) != NULL) - { - elf_next_in_group (hdr->bfd_section) = s; - break; - } - } - } goto success; default: -- 2.7.4