1069 lines
35 KiB
Diff
1069 lines
35 KiB
Diff
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/bfd-in2.h ./bfd/bfd-in2.h
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*** ../delme/binutils-2.19.51.0.2/bfd/bfd-in2.h 2009-02-04 18:21:50.000000000 +0000
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--- ./bfd/bfd-in2.h 2009-03-05 11:59:49.000000000 +0000
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*************** typedef struct bfd_symbol
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*** 4568,4573 ****
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--- 4568,4579 ----
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/* This symbol was created by bfd_get_synthetic_symtab. */
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#define BSF_SYNTHETIC (1 << 21)
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+ /* This symbol is an indirect code object. Unrelated to BSF_INDIRECT.
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+ The dynamic linker will compute the value of this symbol by
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+ calling the function that it points to. BSF_FUNCTION must
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+ also be also set. */
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+ #define BSF_GNU_INDIRECT_FUNCTION (1 << 22)
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+
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flagword flags;
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/* A pointer to the section to which this symbol is
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diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elf32-i386.c ./bfd/elf32-i386.c
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*** ../delme/binutils-2.19.51.0.2/bfd/elf32-i386.c 2009-02-04 18:21:50.000000000 +0000
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--- ./bfd/elf32-i386.c 2009-04-08 16:11:48.000000000 +0100
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*************** elf_i386_tls_transition (struct bfd_link
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*** 1206,1211 ****
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--- 1206,1230 ----
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return TRUE;
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}
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+ /* Returns true if the hash entry refers to a symbol
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+ marked for indirect handling during reloc processing. */
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+
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+ static bfd_boolean
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+ is_indirect_symbol (bfd * abfd, struct elf_link_hash_entry * h)
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+ {
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+ const struct elf_backend_data * bed;
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+
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+ if (abfd == NULL || h == NULL)
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+ return FALSE;
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+
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+ bed = get_elf_backend_data (abfd);
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+
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+ return h->type == STT_GNU_IFUNC
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+ && (bed->elf_osabi == ELFOSABI_LINUX
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+ /* GNU/Linux is still using the default value 0. */
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+ || bed->elf_osabi == ELFOSABI_NONE);
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+ }
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+
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/* Look through the relocs for a section during the first phase, and
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calculate needed space in the global offset table, procedure linkage
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table, and dynamic reloc sections. */
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*************** elf_i386_check_relocs (bfd *abfd,
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*** 1483,1488 ****
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--- 1502,1513 ----
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if (sreloc == NULL)
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return FALSE;
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+
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+ /* Create the ifunc section as well, even if we have not encountered a
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+ indirect function symbol yet. We may not even see one in the input
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+ object file, but we can still encounter them in libraries. */
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+ (void) _bfd_elf_make_ifunc_reloc_section
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+ (abfd, sec, htab->elf.dynobj, 2);
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}
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/* If this is a global symbol, we count the number of
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*************** allocate_dynrelocs (struct elf_link_hash
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*** 1831,1836 ****
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--- 1856,1862 ----
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struct elf_i386_link_hash_table *htab;
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struct elf_i386_link_hash_entry *eh;
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struct elf_i386_dyn_relocs *p;
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+ bfd_boolean use_indirect_section = FALSE;
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if (h->root.type == bfd_link_hash_indirect)
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return TRUE;
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*************** allocate_dynrelocs (struct elf_link_hash
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*** 2052,2057 ****
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--- 2078,2093 ----
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}
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}
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}
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+ else if (is_indirect_symbol (info->output_bfd, h)
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+ && h->dynindx == -1
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+ && ! h->forced_local)
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+ {
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+ if (bfd_elf_link_record_dynamic_symbol (info, h)
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+ && h->dynindx != -1)
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+ use_indirect_section = TRUE;
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+ else
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+ return FALSE;
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+ }
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else if (ELIMINATE_COPY_RELOCS)
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{
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/* For the non-shared case, discard space for relocs against
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*************** allocate_dynrelocs (struct elf_link_hash
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*** 2090,2096 ****
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{
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asection *sreloc;
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! sreloc = elf_section_data (p->sec)->sreloc;
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BFD_ASSERT (sreloc != NULL);
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sreloc->size += p->count * sizeof (Elf32_External_Rel);
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--- 2126,2135 ----
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{
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asection *sreloc;
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! if (use_indirect_section)
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! sreloc = elf_section_data (p->sec)->indirect_relocs;
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! else
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! sreloc = elf_section_data (p->sec)->sreloc;
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BFD_ASSERT (sreloc != NULL);
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sreloc->size += p->count * sizeof (Elf32_External_Rel);
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*************** elf_i386_relocate_section (bfd *output_b
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*** 2894,2899 ****
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--- 2933,2944 ----
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|| h->root.type != bfd_link_hash_undefweak)
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&& (r_type != R_386_PC32
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|| !SYMBOL_CALLS_LOCAL (info, h)))
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+ || (! info->shared
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+ && h != NULL
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+ && h->dynindx != -1
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+ && ! h->forced_local
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+ && ((struct elf_i386_link_hash_entry *) h)->dyn_relocs != NULL
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+ && is_indirect_symbol (output_bfd, h))
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|| (ELIMINATE_COPY_RELOCS
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&& !info->shared
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&& h != NULL
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*************** elf_i386_relocate_section (bfd *output_b
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*** 2942,2948 ****
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outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
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}
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! sreloc = elf_section_data (input_section)->sreloc;
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BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
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--- 2987,3002 ----
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outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
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}
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! if (! info->shared
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! && h != NULL
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! && h->dynindx != -1
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! && ! h->forced_local
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! && is_indirect_symbol (output_bfd, h)
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! && elf_section_data (input_section)->indirect_relocs != NULL
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! && elf_section_data (input_section)->indirect_relocs->contents != NULL)
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! sreloc = elf_section_data (input_section)->indirect_relocs;
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! else
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! sreloc = elf_section_data (input_section)->sreloc;
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BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
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*************** elf_i386_hash_symbol (struct elf_link_ha
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*** 4068,4073 ****
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--- 4122,4146 ----
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return _bfd_elf_hash_symbol (h);
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}
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+ /* Hook called by the linker routine which adds symbols from an object
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+ file. */
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+
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+ static bfd_boolean
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+ elf_i386_add_symbol_hook (bfd *abfd,
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+ struct bfd_link_info *info,
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+ Elf_Internal_Sym *sym,
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+ const char **namep,
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+ flagword *flagsp,
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+ asection **secp,
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+ bfd_vma *valp)
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+ {
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+ if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
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+ elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
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+
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+ return _bfd_elf_add_sharable_symbol (abfd, info, sym, namep, flagsp,
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+ secp, valp);
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+ }
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+
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#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
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#define TARGET_LITTLE_NAME "elf32-i386"
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#define ELF_ARCH bfd_arch_i386
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*************** elf_i386_hash_symbol (struct elf_link_ha
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*** 4113,4121 ****
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#define elf_backend_plt_sym_val elf_i386_plt_sym_val
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#define elf_backend_hash_symbol elf_i386_hash_symbol
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! #define elf_backend_add_symbol_hook \
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! _bfd_elf_add_sharable_symbol
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! #define elf_backend_section_from_bfd_section \
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_bfd_elf_sharable_section_from_bfd_section
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#define elf_backend_symbol_processing \
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_bfd_elf_sharable_symbol_processing
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--- 4186,4194 ----
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#define elf_backend_plt_sym_val elf_i386_plt_sym_val
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#define elf_backend_hash_symbol elf_i386_hash_symbol
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! #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
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!
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! #define elf_backend_section_from_bfd_section \
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_bfd_elf_sharable_section_from_bfd_section
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#define elf_backend_symbol_processing \
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_bfd_elf_sharable_symbol_processing
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*************** elf_i386_hash_symbol (struct elf_link_ha
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*** 4128,4133 ****
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--- 4201,4209 ----
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#define elf_backend_merge_symbol \
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_bfd_elf_sharable_merge_symbol
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+ #undef elf_backend_post_process_headers
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+ #define elf_backend_post_process_headers _bfd_elf_set_osabi
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+
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#include "elf32-target.h"
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/* FreeBSD support. */
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*************** elf_i386_hash_symbol (struct elf_link_ha
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*** 4144,4158 ****
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executables and (for simplicity) also all other object files. */
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static void
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! elf_i386_post_process_headers (bfd *abfd,
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! struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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! Elf_Internal_Ehdr *i_ehdrp;
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!
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! i_ehdrp = elf_elfheader (abfd);
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- /* Put an ABI label supported by FreeBSD >= 4.1. */
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- i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
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#ifdef OLD_FREEBSD_ABI_LABEL
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/* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
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memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
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--- 4220,4229 ----
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executables and (for simplicity) also all other object files. */
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static void
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! elf_i386_post_process_headers (bfd *abfd, struct bfd_link_info *info)
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{
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! _bfd_elf_set_osabi (abfd, info);
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#ifdef OLD_FREEBSD_ABI_LABEL
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/* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
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memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
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diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elf64-x86-64.c ./bfd/elf64-x86-64.c
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*** ../delme/binutils-2.19.51.0.2/bfd/elf64-x86-64.c 2009-02-04 18:21:50.000000000 +0000
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--- ./bfd/elf64-x86-64.c 2009-04-08 16:07:11.000000000 +0100
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*************** static reloc_howto_type x86_64_elf_howto
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*** 161,166 ****
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--- 161,172 ----
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FALSE)
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};
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+ #define IS_X86_64_PCREL_TYPE(TYPE) \
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+ ( ((TYPE) == R_X86_64_PC8) \
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+ || ((TYPE) == R_X86_64_PC16) \
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+ || ((TYPE) == R_X86_64_PC32) \
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+ || ((TYPE) == R_X86_64_PC64))
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+
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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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*************** elf64_x86_64_tls_transition (struct bfd_
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*** 987,992 ****
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--- 993,1017 ----
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return TRUE;
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}
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|
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+ /* Returns true if the hash entry refers to a symbol
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+ marked for indirect handling during reloc processing. */
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+
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+ static bfd_boolean
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+ is_indirect_symbol (bfd * abfd, struct elf_link_hash_entry * h)
|
|
+ {
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|
+ const struct elf_backend_data * bed;
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+
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+ if (abfd == NULL || h == NULL)
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+ return FALSE;
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+
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+ bed = get_elf_backend_data (abfd);
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+
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+ return h->type == STT_GNU_IFUNC
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+ && (bed->elf_osabi == ELFOSABI_LINUX
|
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+ /* GNU/Linux is still using the default value 0. */
|
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+ || bed->elf_osabi == ELFOSABI_NONE);
|
|
+ }
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+
|
|
/* Look through the relocs for a section during the first phase, and
|
|
calculate needed space in the global offset table, procedure
|
|
linkage table, and dynamic reloc sections. */
|
|
*************** elf64_x86_64_check_relocs (bfd *abfd, st
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*** 1013,1019 ****
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sym_hashes = elf_sym_hashes (abfd);
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sreloc = NULL;
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!
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rel_end = relocs + sec->reloc_count;
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for (rel = relocs; rel < rel_end; rel++)
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{
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--- 1038,1044 ----
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sym_hashes = elf_sym_hashes (abfd);
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sreloc = NULL;
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!
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rel_end = relocs + sec->reloc_count;
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for (rel = relocs; rel < rel_end; rel++)
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{
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*************** elf64_x86_64_check_relocs (bfd *abfd, st
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*** 1269,1281 ****
|
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may need to keep relocations for symbols satisfied by a
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dynamic library if we manage to avoid copy relocs for the
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symbol. */
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-
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if ((info->shared
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&& (sec->flags & SEC_ALLOC) != 0
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! && (((r_type != R_X86_64_PC8)
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! && (r_type != R_X86_64_PC16)
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! && (r_type != R_X86_64_PC32)
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! && (r_type != R_X86_64_PC64))
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|| (h != NULL
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&& (! SYMBOLIC_BIND (info, h)
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|| h->root.type == bfd_link_hash_defweak
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--- 1294,1302 ----
|
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may need to keep relocations for symbols satisfied by a
|
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dynamic library if we manage to avoid copy relocs for the
|
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symbol. */
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if ((info->shared
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&& (sec->flags & SEC_ALLOC) != 0
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! && (! IS_X86_64_PCREL_TYPE (r_type)
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|| (h != NULL
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&& (! SYMBOLIC_BIND (info, h)
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|| h->root.type == bfd_link_hash_defweak
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*************** elf64_x86_64_check_relocs (bfd *abfd, st
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*** 1303,1308 ****
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--- 1324,1335 ----
|
|
|
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if (sreloc == NULL)
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return FALSE;
|
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+
|
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+ /* Create the ifunc section, even if we will not encounter an
|
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+ indirect function symbol. We may not even see one in the input
|
|
+ object file, but we can still encounter them in libraries. */
|
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+ (void) _bfd_elf_make_ifunc_reloc_section
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+ (abfd, sec, htab->elf.dynobj, 2);
|
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}
|
|
|
|
/* If this is a global symbol, we count the number of
|
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*************** elf64_x86_64_check_relocs (bfd *abfd, st
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*** 1334,1339 ****
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|
--- 1361,1367 ----
|
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if (p == NULL || p->sec != sec)
|
|
{
|
|
bfd_size_type amt = sizeof *p;
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+
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p = ((struct elf64_x86_64_dyn_relocs *)
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bfd_alloc (htab->elf.dynobj, amt));
|
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if (p == NULL)
|
|
*************** elf64_x86_64_check_relocs (bfd *abfd, st
|
|
*** 1346,1355 ****
|
|
}
|
|
|
|
p->count += 1;
|
|
! if (r_type == R_X86_64_PC8
|
|
! || r_type == R_X86_64_PC16
|
|
! || r_type == R_X86_64_PC32
|
|
! || r_type == R_X86_64_PC64)
|
|
p->pc_count += 1;
|
|
}
|
|
break;
|
|
--- 1374,1380 ----
|
|
}
|
|
|
|
p->count += 1;
|
|
! if (IS_X86_64_PCREL_TYPE (r_type))
|
|
p->pc_count += 1;
|
|
}
|
|
break;
|
|
*************** allocate_dynrelocs (struct elf_link_hash
|
|
*** 1666,1671 ****
|
|
--- 1691,1697 ----
|
|
struct elf64_x86_64_link_hash_table *htab;
|
|
struct elf64_x86_64_link_hash_entry *eh;
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
+ bfd_boolean use_indirect_section = FALSE;
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
*************** allocate_dynrelocs (struct elf_link_hash
|
|
*** 1744,1750 ****
|
|
&& !info->shared
|
|
&& h->dynindx == -1
|
|
&& elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
|
|
! h->got.offset = (bfd_vma) -1;
|
|
else if (h->got.refcount > 0)
|
|
{
|
|
asection *s;
|
|
--- 1770,1778 ----
|
|
&& !info->shared
|
|
&& h->dynindx == -1
|
|
&& elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
|
|
! {
|
|
! h->got.offset = (bfd_vma) -1;
|
|
! }
|
|
else if (h->got.refcount > 0)
|
|
{
|
|
asection *s;
|
|
*************** allocate_dynrelocs (struct elf_link_hash
|
|
*** 1843,1855 ****
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
|
symbol in PIEs. */
|
|
else if (h->dynindx == -1
|
|
! && !h->forced_local)
|
|
! {
|
|
! if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
! return FALSE;
|
|
! }
|
|
}
|
|
}
|
|
else if (ELIMINATE_COPY_RELOCS)
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
--- 1871,1891 ----
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
|
symbol in PIEs. */
|
|
else if (h->dynindx == -1
|
|
! && ! h->forced_local
|
|
! && ! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
! return FALSE;
|
|
}
|
|
}
|
|
+ else if (is_indirect_symbol (info->output_bfd, h)
|
|
+ && h->dynindx == -1
|
|
+ && ! h->forced_local)
|
|
+ {
|
|
+ if (bfd_elf_link_record_dynamic_symbol (info, h)
|
|
+ && h->dynindx != -1)
|
|
+ use_indirect_section = TRUE;
|
|
+ else
|
|
+ return FALSE;
|
|
+ }
|
|
else if (ELIMINATE_COPY_RELOCS)
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
*************** allocate_dynrelocs (struct elf_link_hash
|
|
*** 1866,1876 ****
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
! && !h->forced_local)
|
|
! {
|
|
! if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
! return FALSE;
|
|
! }
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
relocs. */
|
|
--- 1902,1910 ----
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
! && ! h->forced_local
|
|
! && ! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
! return FALSE;
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
relocs. */
|
|
*************** allocate_dynrelocs (struct elf_link_hash
|
|
*** 1888,1894 ****
|
|
{
|
|
asection * sreloc;
|
|
|
|
! sreloc = elf_section_data (p->sec)->sreloc;
|
|
|
|
BFD_ASSERT (sreloc != NULL);
|
|
|
|
--- 1922,1931 ----
|
|
{
|
|
asection * sreloc;
|
|
|
|
! if (use_indirect_section)
|
|
! sreloc = elf_section_data (p->sec)->indirect_relocs;
|
|
! else
|
|
! sreloc = elf_section_data (p->sec)->sreloc;
|
|
|
|
BFD_ASSERT (sreloc != NULL);
|
|
|
|
*************** elf64_x86_64_relocate_section (bfd *outp
|
|
*** 2691,2701 ****
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
! && ((r_type != R_X86_64_PC8
|
|
! && r_type != R_X86_64_PC16
|
|
! && r_type != R_X86_64_PC32
|
|
! && r_type != R_X86_64_PC64)
|
|
! || !SYMBOL_CALLS_LOCAL (info, h)))
|
|
|| (ELIMINATE_COPY_RELOCS
|
|
&& !info->shared
|
|
&& h != NULL
|
|
--- 2728,2741 ----
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
! && (! IS_X86_64_PCREL_TYPE (r_type)
|
|
! || ! SYMBOL_CALLS_LOCAL (info, h)))
|
|
! || (! info->shared
|
|
! && h != NULL
|
|
! && h->dynindx != -1
|
|
! && ! h->forced_local
|
|
! && ((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs != NULL
|
|
! && is_indirect_symbol (output_bfd, h))
|
|
|| (ELIMINATE_COPY_RELOCS
|
|
&& !info->shared
|
|
&& h != NULL
|
|
*************** elf64_x86_64_relocate_section (bfd *outp
|
|
*** 2735,2747 ****
|
|
become local. */
|
|
else if (h != NULL
|
|
&& h->dynindx != -1
|
|
! && (r_type == R_X86_64_PC8
|
|
! || r_type == R_X86_64_PC16
|
|
! || r_type == R_X86_64_PC32
|
|
! || r_type == R_X86_64_PC64
|
|
! || !info->shared
|
|
! || !SYMBOLIC_BIND (info, h)
|
|
! || !h->def_regular))
|
|
{
|
|
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
|
outrel.r_addend = rel->r_addend;
|
|
--- 2775,2784 ----
|
|
become local. */
|
|
else if (h != NULL
|
|
&& h->dynindx != -1
|
|
! && (IS_X86_64_PCREL_TYPE (r_type)
|
|
! || ! info->shared
|
|
! || ! SYMBOLIC_BIND (info, h)
|
|
! || ! h->def_regular))
|
|
{
|
|
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
|
outrel.r_addend = rel->r_addend;
|
|
*************** elf64_x86_64_relocate_section (bfd *outp
|
|
*** 2790,2796 ****
|
|
}
|
|
}
|
|
|
|
! sreloc = elf_section_data (input_section)->sreloc;
|
|
|
|
BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
|
|
|
|
--- 2827,2842 ----
|
|
}
|
|
}
|
|
|
|
! if (! info->shared
|
|
! && h != NULL
|
|
! && h->dynindx != -1
|
|
! && ! h->forced_local
|
|
! && is_indirect_symbol (output_bfd, h)
|
|
! && elf_section_data (input_section)->indirect_relocs != NULL
|
|
! && elf_section_data (input_section)->indirect_relocs->contents != NULL)
|
|
! sreloc = elf_section_data (input_section)->indirect_relocs;
|
|
! else
|
|
! sreloc = elf_section_data (input_section)->sreloc;
|
|
|
|
BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
|
|
|
|
*************** elf64_x86_64_add_symbol_hook (bfd *abfd,
|
|
*** 3712,3717 ****
|
|
--- 3758,3766 ----
|
|
break;
|
|
}
|
|
|
|
+ if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
|
|
+ elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
|
|
+
|
|
return _bfd_elf_add_sharable_symbol (abfd, info, sym, namep, flagsp,
|
|
secp, valp);
|
|
}
|
|
*************** static const struct bfd_elf_special_sect
|
|
*** 3958,3963 ****
|
|
--- 4007,4015 ----
|
|
#define elf_backend_hash_symbol \
|
|
elf64_x86_64_hash_symbol
|
|
|
|
+ #undef elf_backend_post_process_headers
|
|
+ #define elf_backend_post_process_headers _bfd_elf_set_osabi
|
|
+
|
|
#include "elf64-target.h"
|
|
|
|
/* FreeBSD support. */
|
|
*************** static const struct bfd_elf_special_sect
|
|
*** 3970,3978 ****
|
|
#undef ELF_OSABI
|
|
#define ELF_OSABI ELFOSABI_FREEBSD
|
|
|
|
- #undef elf_backend_post_process_headers
|
|
- #define elf_backend_post_process_headers _bfd_elf_set_osabi
|
|
-
|
|
#undef elf64_bed
|
|
#define elf64_bed elf64_x86_64_fbsd_bed
|
|
|
|
--- 4022,4027 ----
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elf-bfd.h ./bfd/elf-bfd.h
|
|
*** ../delme/binutils-2.19.51.0.2/bfd/elf-bfd.h 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./bfd/elf-bfd.h 2009-03-13 16:48:34.000000000 +0000
|
|
*************** struct bfd_elf_section_data
|
|
*** 1294,1299 ****
|
|
--- 1294,1302 ----
|
|
/* A pointer to the bfd section used for dynamic relocs. */
|
|
asection *sreloc;
|
|
|
|
+ /* A pointer to the bfd section used for dynamic relocs against ifunc symbols. */
|
|
+ asection *indirect_relocs;
|
|
+
|
|
union {
|
|
/* Group name, if this section is a member of a group. */
|
|
const char *name;
|
|
*************** struct elf_obj_tdata
|
|
*** 1556,1561 ****
|
|
--- 1559,1569 ----
|
|
bfd_size_type build_id_size;
|
|
bfd_byte *build_id;
|
|
|
|
+ /* True if the bfd contains symbols that have the STT_GNU_IFUNC
|
|
+ symbol type. Used to set the osabi field in the ELF header
|
|
+ structure. */
|
|
+ bfd_boolean has_ifunc_symbols;
|
|
+
|
|
/* An identifier used to distinguish different target
|
|
specific extensions to this structure. */
|
|
enum elf_object_id object_id;
|
|
*************** extern int _bfd_elf_obj_attrs_arg_type (
|
|
*** 2158,2163 ****
|
|
--- 2166,2174 ----
|
|
extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
|
|
extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
|
|
|
|
+ extern asection * _bfd_elf_make_ifunc_reloc_section
|
|
+ (bfd *, asection *, bfd *, unsigned int);
|
|
+
|
|
/* Large common section. */
|
|
extern asection _bfd_elf_large_com_section;
|
|
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elf.c ./bfd/elf.c
|
|
*** ../delme/binutils-2.19.51.0.2/bfd/elf.c 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./bfd/elf.c 2009-03-13 16:49:37.000000000 +0000
|
|
*************** Unable to find equivalent output section
|
|
*** 6508,6513 ****
|
|
--- 6508,6515 ----
|
|
|
|
if ((flags & BSF_THREAD_LOCAL) != 0)
|
|
type = STT_TLS;
|
|
+ else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
|
|
+ type = STT_GNU_IFUNC;
|
|
else if ((flags & BSF_FUNCTION) != 0)
|
|
type = STT_FUNC;
|
|
else if ((flags & BSF_OBJECT) != 0)
|
|
*************** _bfd_elf_set_osabi (bfd * abfd,
|
|
*** 9014,9028 ****
|
|
i_ehdrp = elf_elfheader (abfd);
|
|
|
|
i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
|
|
}
|
|
|
|
|
|
/* Return TRUE for ELF symbol types that represent functions.
|
|
This is the default version of this function, which is sufficient for
|
|
! most targets. It returns true if TYPE is STT_FUNC. */
|
|
|
|
bfd_boolean
|
|
_bfd_elf_is_function_type (unsigned int type)
|
|
{
|
|
! return (type == STT_FUNC);
|
|
}
|
|
--- 9016,9038 ----
|
|
i_ehdrp = elf_elfheader (abfd);
|
|
|
|
i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
|
|
+
|
|
+ /* To make things simpler for the loader on Linux systems we set the
|
|
+ osabi field to ELFOSABI_LINUX if the binary contains symbols of
|
|
+ the STT_GNU_IFUNC type. */
|
|
+ if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
|
|
+ && elf_tdata (abfd)->has_ifunc_symbols)
|
|
+ i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
|
|
}
|
|
|
|
|
|
/* Return TRUE for ELF symbol types that represent functions.
|
|
This is the default version of this function, which is sufficient for
|
|
! most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
|
|
|
|
bfd_boolean
|
|
_bfd_elf_is_function_type (unsigned int type)
|
|
{
|
|
! return (type == STT_FUNC
|
|
! || type == STT_GNU_IFUNC);
|
|
}
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elfcode.h ./bfd/elfcode.h
|
|
*** ../delme/binutils-2.19.51.0.2/bfd/elfcode.h 2009-04-08 16:23:16.000000000 +0100
|
|
--- ./bfd/elfcode.h 2009-03-05 11:54:03.000000000 +0000
|
|
*************** elf_slurp_symbol_table (bfd *abfd, asymb
|
|
*** 1371,1376 ****
|
|
--- 1371,1379 ----
|
|
case STT_SRELC:
|
|
sym->symbol.flags |= BSF_SRELC;
|
|
break;
|
|
+ case STT_GNU_IFUNC:
|
|
+ sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION;
|
|
+ break;
|
|
}
|
|
|
|
if (dynamic)
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/elflink.c ./bfd/elflink.c
|
|
*** ../delme/binutils-2.19.51.0.2/bfd/elflink.c 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./bfd/elflink.c 2009-03-05 11:54:03.000000000 +0000
|
|
*************** _bfd_elf_adjust_dynamic_symbol (struct e
|
|
*** 2776,2781 ****
|
|
--- 2776,2788 ----
|
|
dynobj = elf_hash_table (eif->info)->dynobj;
|
|
bed = get_elf_backend_data (dynobj);
|
|
|
|
+
|
|
+ if (h->type == STT_GNU_IFUNC
|
|
+ && (bed->elf_osabi == ELFOSABI_LINUX
|
|
+ /* GNU/Linux is still using the default value 0. */
|
|
+ || bed->elf_osabi == ELFOSABI_NONE))
|
|
+ h->needs_plt = 1;
|
|
+
|
|
if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
|
|
{
|
|
eif->failed = TRUE;
|
|
*************** _bfd_elf_sharable_merge_symbol
|
|
*** 12806,12808 ****
|
|
--- 12813,12882 ----
|
|
|
|
return TRUE;
|
|
}
|
|
+
|
|
+ /* Returns the name of the ifunc using dynamic reloc section associated with SEC. */
|
|
+ #define IFUNC_INFIX ".ifunc"
|
|
+
|
|
+ static const char *
|
|
+ get_ifunc_reloc_section_name (bfd * abfd,
|
|
+ asection * sec)
|
|
+ {
|
|
+ const char * dot;
|
|
+ char * name;
|
|
+ const char * base_name;
|
|
+ unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
|
|
+ unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
|
|
+
|
|
+ base_name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
|
|
+ if (base_name == NULL)
|
|
+ return NULL;
|
|
+
|
|
+ dot = strchr (base_name + 1, '.');
|
|
+ name = bfd_alloc (abfd, strlen (base_name) + strlen (IFUNC_INFIX) + 1);
|
|
+ sprintf (name, "%.*s%s%s", (int)(dot - base_name), base_name, IFUNC_INFIX, dot);
|
|
+
|
|
+ return name;
|
|
+ }
|
|
+
|
|
+ /* Like _bfd_elf_make_dynamic_reloc_section but it creates a
|
|
+ section for holding relocs against symbols with the STT_GNU_IFUNC
|
|
+ type. The section is attached to the OWNER bfd but it is created
|
|
+ with a name based on SEC from ABFD. */
|
|
+
|
|
+ asection *
|
|
+ _bfd_elf_make_ifunc_reloc_section (bfd * abfd,
|
|
+ asection * sec,
|
|
+ bfd * owner,
|
|
+ unsigned int align)
|
|
+ {
|
|
+ asection * reloc_sec = elf_section_data (sec)->indirect_relocs;
|
|
+
|
|
+ if (reloc_sec == NULL)
|
|
+ {
|
|
+ const char * name = get_ifunc_reloc_section_name (abfd, sec);
|
|
+
|
|
+ if (name == NULL)
|
|
+ return NULL;
|
|
+
|
|
+ reloc_sec = bfd_get_section_by_name (owner, name);
|
|
+
|
|
+ if (reloc_sec == NULL)
|
|
+ {
|
|
+ flagword flags;
|
|
+
|
|
+ flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
|
+ if ((sec->flags & SEC_ALLOC) != 0)
|
|
+ flags |= SEC_ALLOC | SEC_LOAD;
|
|
+
|
|
+ reloc_sec = bfd_make_section_with_flags (owner, name, flags);
|
|
+
|
|
+ if (reloc_sec != NULL
|
|
+ && ! bfd_set_section_alignment (owner, reloc_sec, align))
|
|
+ reloc_sec = NULL;
|
|
+ }
|
|
+
|
|
+ elf_section_data (sec)->indirect_relocs = reloc_sec;
|
|
+ }
|
|
+
|
|
+ return reloc_sec;
|
|
+ }
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/bfd/syms.c ./bfd/syms.c
|
|
*** ../delme/binutils-2.19.51.0.2/bfd/syms.c 2009-02-04 18:14:57.000000000 +0000
|
|
--- ./bfd/syms.c 2009-03-05 11:54:05.000000000 +0000
|
|
*************** CODE_FRAGMENT
|
|
*** 297,302 ****
|
|
--- 297,308 ----
|
|
. {* This symbol was created by bfd_get_synthetic_symtab. *}
|
|
.#define BSF_SYNTHETIC (1 << 21)
|
|
.
|
|
+ . {* This symbol is an indirect code object. Unrelated to BSF_INDIRECT.
|
|
+ . The dynamic linker will compute the value of this symbol by
|
|
+ . calling the function that it points to. BSF_FUNCTION must
|
|
+ . also be also set. *}
|
|
+ .#define BSF_GNU_INDIRECT_FUNCTION (1 << 22)
|
|
+ .
|
|
. flagword flags;
|
|
.
|
|
. {* A pointer to the section to which this symbol is
|
|
*************** bfd_print_symbol_vandf (bfd *abfd, void
|
|
*** 483,489 ****
|
|
(type & BSF_WEAK) ? 'w' : ' ',
|
|
(type & BSF_CONSTRUCTOR) ? 'C' : ' ',
|
|
(type & BSF_WARNING) ? 'W' : ' ',
|
|
! (type & BSF_INDIRECT) ? 'I' : ' ',
|
|
(type & BSF_DEBUGGING) ? 'd' : (type & BSF_DYNAMIC) ? 'D' : ' ',
|
|
((type & BSF_FUNCTION)
|
|
? 'F'
|
|
--- 489,495 ----
|
|
(type & BSF_WEAK) ? 'w' : ' ',
|
|
(type & BSF_CONSTRUCTOR) ? 'C' : ' ',
|
|
(type & BSF_WARNING) ? 'W' : ' ',
|
|
! (type & BSF_INDIRECT) ? 'I' : (type & BSF_GNU_INDIRECT_FUNCTION) ? 'i' : ' ',
|
|
(type & BSF_DEBUGGING) ? 'd' : (type & BSF_DYNAMIC) ? 'D' : ' ',
|
|
((type & BSF_FUNCTION)
|
|
? 'F'
|
|
*************** bfd_decode_symclass (asymbol *symbol)
|
|
*** 669,674 ****
|
|
--- 675,682 ----
|
|
}
|
|
if (bfd_is_ind_section (symbol->section))
|
|
return 'I';
|
|
+ if (symbol->flags & BSF_GNU_INDIRECT_FUNCTION)
|
|
+ return 'i';
|
|
if (symbol->flags & BSF_WEAK)
|
|
{
|
|
/* If weak, determine if it's specifically an object
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/binutils/readelf.c ./binutils/readelf.c
|
|
*** ../delme/binutils-2.19.51.0.2/binutils/readelf.c 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./binutils/readelf.c 2009-03-05 11:53:48.000000000 +0000
|
|
*************** dump_relocations (FILE *file,
|
|
*** 1247,1255 ****
|
|
|
|
printf (" ");
|
|
|
|
- print_vma (psym->st_value, LONG_HEX);
|
|
|
|
! printf (is_32bit_elf ? " " : " ");
|
|
|
|
if (psym->st_name == 0)
|
|
{
|
|
--- 1247,1285 ----
|
|
|
|
printf (" ");
|
|
|
|
|
|
! if (ELF_ST_TYPE (psym->st_info) == STT_GNU_IFUNC)
|
|
! {
|
|
! const char * name;
|
|
! unsigned int len;
|
|
! unsigned int width = is_32bit_elf ? 8 : 14;
|
|
!
|
|
! /* Relocations against GNU_IFUNC symbols do not use the value
|
|
! of the symbol as the address to relocate against. Instead
|
|
! they invoke the function named by the symbol and use its
|
|
! result as the address for relocation.
|
|
!
|
|
! To indicate this to the user, do not display the value of
|
|
! the symbol in the "Symbols's Value" field. Instead show
|
|
! its name followed by () as a hint that the symbol is
|
|
! invoked. */
|
|
!
|
|
! if (strtab == NULL
|
|
! || psym->st_name == 0
|
|
! || psym->st_name >= strtablen)
|
|
! name = "??";
|
|
! else
|
|
! name = strtab + psym->st_name;
|
|
!
|
|
! len = print_symbol (width, name);
|
|
! printf ("()%-*s", len <= width ? (width + 1) - len : 1, " ");
|
|
! }
|
|
! else
|
|
! {
|
|
! print_vma (psym->st_value, LONG_HEX);
|
|
!
|
|
! printf (is_32bit_elf ? " " : " ");
|
|
! }
|
|
|
|
if (psym->st_name == 0)
|
|
{
|
|
*************** get_symbol_type (unsigned int type)
|
|
*** 7166,7171 ****
|
|
--- 7196,7207 ----
|
|
return "HP_STUB";
|
|
}
|
|
|
|
+ if (type == STT_GNU_IFUNC
|
|
+ && (elf_header.e_ident[EI_OSABI] == ELFOSABI_LINUX
|
|
+ /* GNU/Linux is still using the default value 0. */
|
|
+ || elf_header.e_ident[EI_OSABI] == ELFOSABI_NONE))
|
|
+ return "IFUNC";
|
|
+
|
|
snprintf (buff, sizeof (buff), _("<OS specific>: %d"), type);
|
|
}
|
|
else
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/elfcpp/elfcpp.h ./elfcpp/elfcpp.h
|
|
*** ../delme/binutils-2.19.51.0.2/elfcpp/elfcpp.h 2009-02-04 18:14:52.000000000 +0000
|
|
--- ./elfcpp/elfcpp.h 2009-03-05 11:53:39.000000000 +0000
|
|
*************** enum STT
|
|
*** 476,481 ****
|
|
--- 476,482 ----
|
|
STT_COMMON = 5,
|
|
STT_TLS = 6,
|
|
STT_LOOS = 10,
|
|
+ STT_GNU_IFUNC = 10,
|
|
STT_HIOS = 12,
|
|
STT_LOPROC = 13,
|
|
STT_HIPROC = 15,
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/config/obj-elf.c ./gas/config/obj-elf.c
|
|
*** ../delme/binutils-2.19.51.0.2/gas/config/obj-elf.c 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./gas/config/obj-elf.c 2009-03-05 11:53:52.000000000 +0000
|
|
*************** obj_elf_type (int ignore ATTRIBUTE_UNUSE
|
|
*** 1706,1711 ****
|
|
--- 1706,1725 ----
|
|
}
|
|
}
|
|
}
|
|
+ else if (strcmp (typename, "gnu_indirect_function") == 0
|
|
+ || strcmp (typename, "10") == 0
|
|
+ || strcmp (typename, "STT_GNU_IFUNC") == 0)
|
|
+ {
|
|
+ const struct elf_backend_data *bed;
|
|
+
|
|
+ bed = get_elf_backend_data (stdoutput);
|
|
+ if (!(bed->elf_osabi == ELFOSABI_LINUX
|
|
+ /* GNU/Linux is still using the default value 0. */
|
|
+ || bed->elf_osabi == ELFOSABI_NONE))
|
|
+ as_bad (_("symbol type \"%s\" is supported only by GNU targets"),
|
|
+ typename);
|
|
+ type = BSF_FUNCTION | BSF_GNU_INDIRECT_FUNCTION;
|
|
+ }
|
|
#ifdef md_elf_symbol_type
|
|
else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
|
|
;
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/config/tc-i386.c ./gas/config/tc-i386.c
|
|
*** ../delme/binutils-2.19.51.0.2/gas/config/tc-i386.c 2009-02-04 18:14:55.000000000 +0000
|
|
--- ./gas/config/tc-i386.c 2009-03-05 11:53:53.000000000 +0000
|
|
*************** tc_i386_fix_adjustable (fixS *fixP ATTRI
|
|
*** 2499,2504 ****
|
|
--- 2499,2508 ----
|
|
|| fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|
|
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
|
|
return 0;
|
|
+
|
|
+ if (fixP->fx_addsy != NULL
|
|
+ && symbol_get_bfdsym (fixP->fx_addsy)->flags & BSF_GNU_INDIRECT_FUNCTION)
|
|
+ return 0;
|
|
#endif
|
|
return 1;
|
|
}
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/doc/as.texinfo ./gas/doc/as.texinfo
|
|
*** ../delme/binutils-2.19.51.0.2/gas/doc/as.texinfo 2009-01-06 17:48:21.000000000 +0000
|
|
--- ./gas/doc/as.texinfo 2009-03-05 11:53:52.000000000 +0000
|
|
*************** The types supported are:
|
|
*** 6277,6282 ****
|
|
--- 6277,6287 ----
|
|
@itemx function
|
|
Mark the symbol as being a function name.
|
|
|
|
+ @item STT_GNU_IFUNC
|
|
+ @itemx gnu_indirect_function
|
|
+ Mark the symbol as an indirect function when evaluated during reloc
|
|
+ processing. (This is only supported on Linux targeted assemblers).
|
|
+
|
|
@item STT_OBJECT
|
|
@itemx object
|
|
Mark the symbol as being a data object.
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/NEWS ./gas/NEWS
|
|
*** ../delme/binutils-2.19.51.0.2/gas/NEWS 2009-01-06 17:48:20.000000000 +0000
|
|
--- ./gas/NEWS 2009-03-05 11:54:03.000000000 +0000
|
|
***************
|
|
*** 1,5 ****
|
|
--- 1,10 ----
|
|
-*- text -*-
|
|
|
|
+ * The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to
|
|
+ indicate that if the symbol is the target of a relocation, its value should
|
|
+ not be use. Instead the function should be invoked and its result used as
|
|
+ the value.
|
|
+
|
|
* Add support for Lattice Mico32 (lm32) architecture.
|
|
|
|
Changes in 2.19:
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/testsuite/gas/elf/type.e ./gas/testsuite/gas/elf/type.e
|
|
*** ../delme/binutils-2.19.51.0.2/gas/testsuite/gas/elf/type.e 2007-11-03 20:40:37.000000000 +0000
|
|
--- ./gas/testsuite/gas/elf/type.e 2009-03-05 11:53:56.000000000 +0000
|
|
***************
|
|
*** 1,5 ****
|
|
.: 0+0 1 FUNC LOCAL DEFAULT . function
|
|
.: 0+0 1 OBJECT LOCAL DEFAULT . object
|
|
.: 0+1 1 TLS LOCAL DEFAULT . tls_object
|
|
! .: 0+2 1 NOTYPE LOCAL DEFAULT . notype
|
|
..: 0+1 1 (COMMON|OBJECT) GLOBAL DEFAULT COM common
|
|
--- 1,6 ----
|
|
.: 0+0 1 FUNC LOCAL DEFAULT . function
|
|
+ .: 0+1 1 IFUNC LOCAL DEFAULT . indirect_function
|
|
.: 0+0 1 OBJECT LOCAL DEFAULT . object
|
|
.: 0+1 1 TLS LOCAL DEFAULT . tls_object
|
|
! ..: 0+2 1 NOTYPE LOCAL DEFAULT . notype
|
|
..: 0+1 1 (COMMON|OBJECT) GLOBAL DEFAULT COM common
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/gas/testsuite/gas/elf/type.s ./gas/testsuite/gas/elf/type.s
|
|
*** ../delme/binutils-2.19.51.0.2/gas/testsuite/gas/elf/type.s 2007-11-03 20:40:37.000000000 +0000
|
|
--- ./gas/testsuite/gas/elf/type.s 2009-03-05 11:53:56.000000000 +0000
|
|
***************
|
|
*** 3,8 ****
|
|
--- 3,12 ----
|
|
.type function,%function
|
|
function:
|
|
.byte 0x0
|
|
+ .size indirect_function,1
|
|
+ .type indirect_function,%gnu_indirect_function
|
|
+ indirect_function:
|
|
+ .byte 0x0
|
|
.data
|
|
.type object,%object
|
|
.size object,1
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/include/elf/common.h ./include/elf/common.h
|
|
*** ../delme/binutils-2.19.51.0.2/include/elf/common.h 2009-02-04 18:21:50.000000000 +0000
|
|
--- ./include/elf/common.h 2009-03-05 11:53:39.000000000 +0000
|
|
***************
|
|
*** 549,554 ****
|
|
--- 549,555 ----
|
|
#define STT_RELC 8 /* Complex relocation expression */
|
|
#define STT_SRELC 9 /* Signed Complex relocation expression */
|
|
#define STT_LOOS 10 /* OS-specific semantics */
|
|
+ #define STT_GNU_IFUNC 10 /* Symbol is an indirect code object */
|
|
#define STT_HIOS 12 /* OS-specific semantics */
|
|
#define STT_LOPROC 13 /* Application-specific semantics */
|
|
#define STT_HIPROC 15 /* Application-specific semantics */
|
|
diff -rcp ../delme/binutils-2.19.51.0.2/ld/NEWS ./ld/NEWS
|
|
*** ../delme/binutils-2.19.51.0.2/ld/NEWS 2009-04-08 16:22:56.000000000 +0100
|
|
--- ./ld/NEWS 2009-03-05 11:53:45.000000000 +0000
|
|
***************
|
|
*** 1,5 ****
|
|
--- 1,9 ----
|
|
-*- text -*-
|
|
|
|
+ * For GNU/Linux systems the linker will now avoid processing any relocations
|
|
+ made against symbols of the STT_GNU_IFUNC type and instead emit them into
|
|
+ the resulting binary for processing by the loader.
|
|
+
|
|
* --as-needed now links in a dynamic library if it satisfies undefined
|
|
symbols in regular objects, or in other dynamic libraries. In the
|
|
latter case the library is not linked if it is found in a DT_NEEDED
|