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ELF: Add _bfd_elf_add_dynamic_tags

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All ELF backends with shared library support need to add dynamic tags.
Add dt_pltgot_required and dt_jmprel_required to elf_link_hash_table to
indicate that DT_PLTGOT and DT_JMPREL are required dynamic tags.

1. Add _bfd_elf_add_dynamic_tags to add common dynamic tags.
2. Add _bfd_elf_maybe_vxworks_add_dynamic_tags to add common VxWorks
dynamic tags.

	* elf-bfd.h (elf_link_hash_table): Add dt_pltgot_required and
	dt_jmprel_required.
	(_bfd_elf_add_dynamic_tags): New.
	* elf-m10300.c (_bfd_mn10300_elf_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf32-arc.c (elf_arc_size_dynamic_sections): Likewise.
	* elf32-bfin.c (elf32_bfinfdpic_size_dynamic_sections): Likewise.
	* elf32-cr16.c (_bfd_cr16_elf_size_dynamic_sections): Likewise.
	* elf32-frv.c (elf32_frvfdpic_size_dynamic_sections): Likewise.
	* elf32-lm32.c (lm32_elf_size_dynamic_sections): Likewise.
	* elf32-m32r.c (m32r_elf_size_dynamic_sections): Likewise.
	* elf32-m68k.c (elf_m68k_size_dynamic_sections): Likewise.
	* elf32-microblaze.c (microblaze_elf_size_dynamic_sections):
	Likewise.
	* elf32-nds32.c (nds32_elf_size_dynamic_sections): Likewise.
	* elf32-nios2.c (nios2_elf32_size_dynamic_sections): Likewise.
	* elf32-or1k.c (or1k_elf_size_dynamic_sections): Likewise.
	* elf32-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elf32-tilepro.c (tilepro_elf_size_dynamic_sections): Likewise.
	* elf32-vax.c (elf_vax_size_dynamic_sections): Likewise.
	* elf64-alpha.c (elf64_alpha_size_dynamic_sections): Likewise.
	* elf64-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_size_dynamic_sections):
	Likewise.
	* elfnn-riscv.c (riscv_elf_size_dynamic_sections): Likewise.
	* elfxx-tilegx.c (tilegx_elf_size_dynamic_sections): Likewise.
	* elf32-arm.c (elf32_arm_size_dynamic_sections): Call
	_bfd_elf_maybe_vxworks_add_dynamic_tags.
	* elf32-ppc.c (ppc_elf_size_dynamic_sections): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_size_dynamic_sections):
	Likewise.
	* elfxx-x86.c (_bfd_x86_elf_link_hash_table_create): Likewise.
	(_bfd_x86_elf_size_dynamic_sections): Likewise.
	* elfxx-x86.h (elf_x86_link_hash_table): Remove dt_reloc,
	dt_reloc_sz and dt_reloc_ent.
	* elf-vxworks.c (_bfd_elf_maybe_vxworks_add_dynamic_tags): New.
	* elf-vxworks.h (_bfd_elf_maybe_vxworks_add_dynamic_tags):
	Likewise.
	* elf32-hppa.c (elf32_hppa_link_hash_table_create): Set
	etab.dt_pltgot_required.
	(elf32_hppa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf32-metag.c (elf_metag_link_hash_table_create): Set
	etab.dt_pltgot_required.
	(elf_metag_size_dynamic_sections): Call _bfd_elf_add_dynamic_tags.
	* elf32-sh.c (sh_elf_link_hash_table_create): Set
	root.dt_pltgot_required for FDPIC output.
	(sh_elf_size_dynamic_sections): Call
	_bfd_elf_maybe_vxworks_add_dynamic_tags.
	* elf32-xtensa.c (elf_xtensa_link_hash_table_create): Set
	elf.dt_pltgot_required.
	(elf_xtensa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf64-hppa.c (elf64_hppa_hash_table_create): Set
	root.dt_pltgot_required.
	(elf64_hppa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elfnn-ia64.c (elfNN_ia64_hash_table_create): Set
	root.dt_pltgot_required.
	(elfNN_ia64_size_dynamic_sections): Set root.dt_jmprel_required
	for rel_pltoff_sec.  Call _bfd_elf_add_dynamic_tags.
	* elflink.c (_bfd_elf_add_dynamic_tags): New.
This commit is contained in:
H.J. Lu
2020-06-23 05:07:31 -07:00
parent 2e573c0a3f
commit 3084d7a27b
36 changed files with 257 additions and 1409 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
bfd/elf32-arc.c
View File

@ -2707,7 +2707,6 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
bfd *dynobj;
asection *s;
bfd_boolean relocs_exist = FALSE;
bfd_boolean reltext_exist = FALSE;
struct elf_link_hash_table *htab = elf_hash_table (info);
dynobj = htab->dynobj;
@ -2762,29 +2761,7 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
else if (strncmp (s->name, ".rela", 5) == 0)
{
if (s->size != 0 && s != htab->srelplt)
{
if (!reltext_exist)
{
const char *name = s->name + 5;
bfd *ibfd;
for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour
&& ibfd->flags & DYNAMIC)
{
asection *target = bfd_get_section_by_name (ibfd, name);
if (target != NULL
&& elf_section_data (target)->sreloc == s
&& ((target->output_section->flags
& (SEC_READONLY | SEC_ALLOC))
== (SEC_READONLY | SEC_ALLOC)))
{
reltext_exist = TRUE;
break;
}
}
}
relocs_exist = TRUE;
}
relocs_exist = TRUE;
/* We use the reloc_count field as a counter if we need to
copy relocs into the output file. */
@ -2811,33 +2788,7 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
return FALSE;
}
if (htab->dynamic_sections_created)
{
/* TODO: Check if this is needed. */
if (!bfd_link_pic (info))
if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
return FALSE;
if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0)
if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|| !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
return FALSE;
if (relocs_exist)
if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
sizeof (Elf32_External_Rela)))
return FALSE;
if (reltext_exist)
if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
return FALSE;
}
return TRUE;
return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs_exist);
}