x86: Add GENERATE_DYNAMIC_RELOCATION_P
Add GENERATE_DYNAMIC_RELOCATION_P which returns TRUE if dynamic relocation should be generated. * elf32-i386.c (X86_SIZE_TYPE_P): New. (elf_i386_relocate_section): Use GENERATE_DYNAMIC_RELOCATION_P. * elf64-x86-64.c (X86_SIZE_TYPE_P): New. (elf_x86_64_relocate_section): Use GENERATE_DYNAMIC_RELOCATION_P. * elfxx-x86.h (GENERATE_DYNAMIC_RELOCATION_P): New.
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@ -1,3 +1,11 @@
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2017-10-06 H.J. Lu <hongjiu.lu@intel.com>
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* elf32-i386.c (X86_SIZE_TYPE_P): New.
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(elf_i386_relocate_section): Use GENERATE_DYNAMIC_RELOCATION_P.
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* elf64-x86-64.c (X86_SIZE_TYPE_P): New.
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(elf_x86_64_relocate_section): Use GENERATE_DYNAMIC_RELOCATION_P.
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* elfxx-x86.h (GENERATE_DYNAMIC_RELOCATION_P): New.
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2017-10-06 H.J. Lu <hongjiu.lu@intel.com>
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* elfxx-x86.h (POINTER_LOCAL_IFUNC_P): New.
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@ -184,6 +184,8 @@ static reloc_howto_type elf_howto_table[]=
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#define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
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#define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
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#ifdef DEBUG_GEN_RELOC
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#define TRACE(str) \
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fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
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@ -2749,29 +2751,9 @@ disallow_got32:
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|| is_vxworks_tls)
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break;
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/* Copy dynamic function pointer relocations. Don't generate
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dynamic relocations against resolved undefined weak symbols
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in PIE, except for R_386_PC32. */
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if ((bfd_link_pic (info)
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&& (h == NULL
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|| ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
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&& (!resolved_to_zero
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|| r_type == R_386_PC32))
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|| h->root.type != bfd_link_hash_undefweak))
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&& ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
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|| !SYMBOL_CALLS_LOCAL (info, h)))
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|| (ELIMINATE_COPY_RELOCS
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&& !bfd_link_pic (info)
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&& h != NULL
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&& h->dynindx != -1
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&& (!h->non_got_ref
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|| eh->func_pointer_refcount > 0
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|| (h->root.type == bfd_link_hash_undefweak
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&& !resolved_to_zero))
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&& ((h->def_dynamic && !h->def_regular)
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/* Undefined weak symbol is bound locally when
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PIC is false. */
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|| h->root.type == bfd_link_hash_undefweak)))
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if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
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FALSE, resolved_to_zero,
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(r_type == R_386_PC32)))
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{
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Elf_Internal_Rela outrel;
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bfd_boolean skip, relocate;
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@ -206,6 +206,9 @@ static reloc_howto_type x86_64_elf_howto_table[] =
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|| ((TYPE) == R_X86_64_PC32_BND) \
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|| ((TYPE) == R_X86_64_PC64))
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#define X86_SIZE_TYPE_P(TYPE) \
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((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64)
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/* Map BFD relocs to the x86_64 elf relocs. */
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struct elf_reloc_map
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{
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@ -2393,6 +2396,7 @@ elf_x86_64_relocate_section (bfd *output_bfd,
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bfd_boolean resolved_to_zero;
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bfd_boolean relative_reloc;
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bfd_boolean converted_reloc;
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bfd_boolean need_copy_reloc_in_pie;
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r_type = ELF32_R_TYPE (rel->r_info);
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if (r_type == (int) R_X86_64_GNU_VTINHERIT
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@ -3085,40 +3089,18 @@ direct:
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if ((input_section->flags & SEC_ALLOC) == 0)
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break;
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/* Don't copy a pc-relative relocation into the output file
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if the symbol needs copy reloc or the symbol is undefined
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when building executable. Copy dynamic function pointer
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relocations. Don't generate dynamic relocations against
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resolved undefined weak symbols in PIE. */
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if ((bfd_link_pic (info)
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&& !(bfd_link_pie (info)
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&& h != NULL
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&& (h->needs_copy
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|| eh->needs_copy
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|| h->root.type == bfd_link_hash_undefined)
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&& (X86_PCREL_TYPE_P (r_type)
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|| r_type == R_X86_64_SIZE32
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|| r_type == R_X86_64_SIZE64))
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&& (h == NULL
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|| ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
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&& !resolved_to_zero)
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|| h->root.type != bfd_link_hash_undefweak))
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&& ((! X86_PCREL_TYPE_P (r_type)
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&& r_type != R_X86_64_SIZE32
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&& r_type != R_X86_64_SIZE64)
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|| ! SYMBOL_CALLS_LOCAL (info, h)))
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|| (ELIMINATE_COPY_RELOCS
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&& !bfd_link_pic (info)
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&& h != NULL
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&& h->dynindx != -1
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&& (!h->non_got_ref
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|| eh->func_pointer_refcount > 0
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|| (h->root.type == bfd_link_hash_undefweak
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&& !resolved_to_zero))
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&& ((h->def_dynamic && !h->def_regular)
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/* Undefined weak symbol is bound locally when
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PIC is false. */
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|| h->root.type == bfd_link_hash_undefined)))
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need_copy_reloc_in_pie = (bfd_link_pie (info)
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&& h != NULL
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&& (h->needs_copy
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|| eh->needs_copy
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|| (h->root.type
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== bfd_link_hash_undefined))
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&& (X86_PCREL_TYPE_P (r_type)
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|| X86_SIZE_TYPE_P (r_type)));
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if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
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need_copy_reloc_in_pie,
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resolved_to_zero, FALSE))
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{
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Elf_Internal_Rela outrel;
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bfd_boolean skip, relocate;
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@ -113,6 +113,36 @@
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&& ((H)->root.type == bfd_link_hash_defweak \
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|| !(H)->def_regular)))
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/* TRUE if dynamic relocation should be generated. Don't copy a
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pc-relative relocation into the output file if the symbol needs
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copy reloc or the symbol is undefined when building executable.
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Copy dynamic function pointer relocations. Don't generate dynamic
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relocations against resolved undefined weak symbols in PIE, except
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when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
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when PIC is false. */
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#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
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NEED_COPY_RELOC_IN_PIE, \
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RESOLVED_TO_ZERO, PC32_RELOC) \
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((bfd_link_pic (INFO) \
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&& !(NEED_COPY_RELOC_IN_PIE) \
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&& ((EH) == NULL \
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|| ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
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&& (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
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|| (EH)->elf.root.type != bfd_link_hash_undefweak)) \
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&& ((!X86_PCREL_TYPE_P (R_TYPE) \
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&& !X86_SIZE_TYPE_P (R_TYPE)) \
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|| ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
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|| (ELIMINATE_COPY_RELOCS \
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&& !bfd_link_pic (INFO) \
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&& (EH) != NULL \
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&& (EH)->elf.dynindx != -1 \
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&& (!(EH)->elf.non_got_ref \
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|| (EH)->func_pointer_refcount > 0 \
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|| ((EH)->elf.root.type == bfd_link_hash_undefweak \
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&& !(RESOLVED_TO_ZERO))) \
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&& (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
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|| (EH)->elf.root.type == bfd_link_hash_undefined)))
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/* TRUE if this is actually a static link, or it is a -Bsymbolic link
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and the symbol is defined locally, or the symbol was forced to be
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local because of a version file. */
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