From a3cd202aae50abe5a571fb8c186b6b6af68edce2 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Sat, 14 Oct 2017 10:25:33 -0700 Subject: [PATCH] tile: Check UNDEFWEAK_NO_DYNAMIC_RELOC Don't generate dynamic relocation against weak undefined symbol if it is resolved to zero. FIXME: UNDEFWEAK_NO_DYNAMIC_RELOC may need to be checked in more places. PR ld/22269 * elf32-tilepro.c (allocate_dynrelocs): Discard dynamic relocations if UNDEFWEAK_NO_DYNAMIC_RELOC is true. (tilepro_elf_relocate_section): Don't generate dynamic relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true. * elfxx-tilegx.c (allocate_dynrelocs): Discard dynamic relocations if UNDEFWEAK_NO_DYNAMIC_RELOC is true. (tilegx_elf_relocate_section): Don't generate dynamic relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true. --- bfd/ChangeLog | 12 ++++++++++++ bfd/elf32-tilepro.c | 11 ++++++++--- bfd/elfxx-tilegx.c | 11 ++++++++--- 3 files changed, 28 insertions(+), 6 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 70b153b..0dc2f44a 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,6 +1,18 @@ 2017-10-14 H.J. Lu PR ld/22269 + * elf32-tilepro.c (allocate_dynrelocs): Discard dynamic + relocations if UNDEFWEAK_NO_DYNAMIC_RELOC is true. + (tilepro_elf_relocate_section): Don't generate dynamic + relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true. + * elfxx-tilegx.c (allocate_dynrelocs): Discard dynamic + relocations if UNDEFWEAK_NO_DYNAMIC_RELOC is true. + (tilegx_elf_relocate_section): Don't generate dynamic + relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true. + +2017-10-14 H.J. Lu + + PR ld/22269 * elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Don't generate dynamic relocation if UNDEFWEAK_NO_DYNAMIC_RELOC is true. diff --git a/bfd/elf32-tilepro.c b/bfd/elf32-tilepro.c index 75a7de5..ad22335 100644 --- a/bfd/elf32-tilepro.c +++ b/bfd/elf32-tilepro.c @@ -2332,7 +2332,8 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) { - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) eh->dyn_relocs = NULL; /* Make sure undefined weak symbols are output as a dynamic @@ -2860,7 +2861,7 @@ tilepro_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, const char *name; bfd_vma off; bfd_boolean is_plt = FALSE; - + bfd_boolean resolved_to_zero; bfd_boolean unresolved_reloc; r_type = ELF32_R_TYPE (rel->r_info); @@ -3035,6 +3036,9 @@ tilepro_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, break; } + resolved_to_zero = (h != NULL + && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); + switch (r_type) { case R_TILEPRO_IMM16_X0_GOT: @@ -3203,7 +3207,8 @@ tilepro_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, if ((bfd_link_pic (info) && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && !resolved_to_zero) || h->root.type != bfd_link_hash_undefweak) && (! howto->pc_relative || !SYMBOL_CALLS_LOCAL (info, h))) diff --git a/bfd/elfxx-tilegx.c b/bfd/elfxx-tilegx.c index b83adc8..a14451b 100644 --- a/bfd/elfxx-tilegx.c +++ b/bfd/elfxx-tilegx.c @@ -2599,7 +2599,8 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) { - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) eh->dyn_relocs = NULL; /* Make sure undefined weak symbols are output as a dynamic @@ -3159,7 +3160,7 @@ tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, const char *name; bfd_vma off; bfd_boolean is_plt = FALSE; - + bfd_boolean resolved_to_zero; bfd_boolean unresolved_reloc; r_type = TILEGX_ELF_R_TYPE (rel->r_info); @@ -3413,6 +3414,9 @@ tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, break; } + resolved_to_zero = (h != NULL + && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); + switch (r_type) { case R_TILEGX_IMM16_X0_HW0_GOT: @@ -3610,7 +3614,8 @@ tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, if ((bfd_link_pic (info) && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + && !resolved_to_zero) || h->root.type != bfd_link_hash_undefweak) && (! howto->pc_relative || !SYMBOL_CALLS_LOCAL (info, h))) -- 2.7.4