&& elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \
? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL)
+/* Will references to this symbol always be local in this object? */
+#define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \
+ _bfd_x86_elf_link_symbol_references_local ((INFO), (H))
+
/* Is a undefined weak symbol which is resolved to 0. Reference to an
undefined weak symbol is resolved to 0 when building executable if
it isn't dynamic and
2. Has no GOT/PLT relocation.
Local undefined weak symbol is always resolved to 0.
*/
-#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, ID, GOT_RELOC, EH) \
+#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
((EH)->elf.root.type == bfd_link_hash_undefweak \
- && ((EH)->elf.forced_local \
+ && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \
|| (bfd_link_executable (INFO) \
- && (elf_x86_hash_table ((INFO), (ID))->interp == NULL \
- || !(GOT_RELOC) \
- || (EH)->has_non_got_reloc \
- || !(INFO)->dynamic_undefined_weak))))
+ && (!(EH)->has_got_reloc \
+ || (EH)->has_non_got_reloc))))
/* Should copy relocation be generated for a symbol. Don't generate
copy relocation against a protected symbol defined in a shared
&& ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
&& ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
+/* TRUE if dynamic relocation is needed. If we are creating a shared
+ library, and this is a reloc against a global symbol, or a non PC
+ relative reloc against a local symbol, then we need to copy the reloc
+ into the shared library. However, if we are linking with -Bsymbolic,
+ we do not need to copy a reloc against a global symbol which is
+ defined in an object we are including in the link (i.e., DEF_REGULAR
+ is set). At this point we have not seen all the input files, so it
+ is possible that DEF_REGULAR is not set now but will be set later (it
+ is never cleared). In case of a weak definition, DEF_REGULAR may be
+ cleared later by a strong definition in a shared library. We account
+ for that possibility below by storing information in the relocs_copied
+ field of the hash table entry. A similar situation occurs when
+ creating shared libraries and symbol visibility changes render the
+ symbol local.
+
+ If on the other hand, we are creating an executable, we may need to
+ keep relocations for symbols satisfied by a dynamic library if we
+ manage to avoid copy relocs for the symbol.
+
+ We also need to generate dynamic pointer relocation against
+ STT_GNU_IFUNC symbol in the non-code section. */
+#define NEED_DYNAMIC_RELOCATION_P(INFO, H, SEC, R_TYPE, POINTER_TYPE) \
+ ((bfd_link_pic (INFO) \
+ && (! X86_PCREL_TYPE_P (R_TYPE) \
+ || ((H) != NULL \
+ && (! (bfd_link_pie (INFO) \
+ || SYMBOLIC_BIND ((INFO), (H))) \
+ || (H)->root.type == bfd_link_hash_defweak \
+ || !(H)->def_regular)))) \
+ || ((H) != NULL \
+ && (H)->type == STT_GNU_IFUNC \
+ && (R_TYPE) == POINTER_TYPE \
+ && ((SEC)->flags & SEC_CODE) == 0) \
+ || (ELIMINATE_COPY_RELOCS \
+ && !bfd_link_pic (INFO) \
+ && (H) != NULL \
+ && ((H)->root.type == bfd_link_hash_defweak \
+ || !(H)->def_regular)))
+
+/* TRUE if dynamic relocation should be generated. Don't copy a
+ pc-relative relocation into the output file if the symbol needs
+ copy reloc or the symbol is undefined when building executable.
+ Copy dynamic function pointer relocations. Don't generate dynamic
+ relocations against resolved undefined weak symbols in PIE, except
+ when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
+ when PIC is false. */
+#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
+ NEED_COPY_RELOC_IN_PIE, \
+ RESOLVED_TO_ZERO, PC32_RELOC) \
+ ((bfd_link_pic (INFO) \
+ && !(NEED_COPY_RELOC_IN_PIE) \
+ && ((EH) == NULL \
+ || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
+ && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
+ || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
+ && ((!X86_PCREL_TYPE_P (R_TYPE) \
+ && !X86_SIZE_TYPE_P (R_TYPE)) \
+ || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
+ || (ELIMINATE_COPY_RELOCS \
+ && !bfd_link_pic (INFO) \
+ && (EH) != NULL \
+ && (EH)->elf.dynindx != -1 \
+ && (!(EH)->elf.non_got_ref \
+ || (EH)->func_pointer_refcount > 0 \
+ || ((EH)->elf.root.type == bfd_link_hash_undefweak \
+ && !(RESOLVED_TO_ZERO))) \
+ && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
+ || (EH)->elf.root.type == bfd_link_hash_undefined)))
+
+/* TRUE if this input relocation should be copied to output. H->dynindx
+ may be -1 if this symbol was marked to become local. */
+#define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
+ ((H) != NULL \
+ && (H)->dynindx != -1 \
+ && (X86_PCREL_TYPE_P (R_TYPE) \
+ || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
+ || !(H)->def_regular))
+
+/* TRUE if this is actually a static link, or it is a -Bsymbolic link
+ and the symbol is defined locally, or the symbol was forced to be
+ local because of a version file. */
+#define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
+ (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
+ bfd_link_pic (INFO), (H)) \
+ || (bfd_link_pic (INFO) \
+ && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
+ || (ELF_ST_VISIBILITY ((H)->other) \
+ && (H)->root.type == bfd_link_hash_undefweak))
+
+/* TRUE if relative relocation should be generated. GOT reference to
+ global symbol in PIC will lead to dynamic symbol. It becomes a
+ problem when "time" or "times" is defined as a variable in an
+ executable, clashing with functions of the same name in libc. If a
+ symbol isn't undefined weak symbol, don't make it dynamic in PIC and
+ generate relative relocation. */
+#define GENERATE_RELATIVE_RELOC_P(INFO, H) \
+ ((H)->dynindx == -1 \
+ && !(H)->forced_local \
+ && (H)->root.type != bfd_link_hash_undefweak \
+ && bfd_link_pic (INFO))
+
+/* TRUE if this is a pointer reference to a local IFUNC. */
+#define POINTER_LOCAL_IFUNC_P(INFO, H) \
+ ((H)->dynindx == -1 \
+ || (H)->forced_local \
+ || bfd_link_executable (INFO))
+
+/* TRUE if this is a PLT reference to a local IFUNC. */
+#define PLT_LOCAL_IFUNC_P(INFO, H) \
+ ((H)->dynindx == -1 \
+ || ((bfd_link_executable (INFO) \
+ || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
+ && (H)->def_regular \
+ && (H)->type == STT_GNU_IFUNC))
+
+/* TRUE if TLS IE->LE transition is OK. */
+#define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
+ (bfd_link_executable (INFO) \
+ && (H) != NULL \
+ && (H)->dynindx == -1 \
+ && (TLS_TYPE & GOT_TLS_IE))
+
+/* Verify that the symbol has an entry in the procedure linkage table. */
+#define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
+ do \
+ { \
+ if (((H)->dynindx == -1 \
+ && !LOCAL_UNDEFWEAK \
+ && !(((H)->forced_local || bfd_link_executable (INFO)) \
+ && (H)->def_regular \
+ && (H)->type == STT_GNU_IFUNC)) \
+ || (PLT) == NULL \
+ || (GOTPLT) == NULL \
+ || (RELPLT) == NULL) \
+ abort (); \
+ } \
+ while (0);
+
+/* Verify that the symbol supports copy relocation. */
+#define VERIFY_COPY_RELOC(H, HTAB) \
+ do \
+ { \
+ if ((H)->dynindx == -1 \
+ || ((H)->root.type != bfd_link_hash_defined \
+ && (H)->root.type != bfd_link_hash_defweak) \
+ || (HTAB)->elf.srelbss == NULL \
+ || (HTAB)->elf.sreldynrelro == NULL) \
+ abort (); \
+ } \
+ while (0);
+
/* x86 ELF linker hash entry. */
struct elf_x86_link_hash_entry
/* TRUE if symbol is defined as a protected symbol. */
unsigned int def_protected : 1;
- /* Symbol is referenced by R_386_GOTOFF relocation. This is only used
- by i386. */
+ /* 0: Symbol references are unknown.
+ 1: Symbol references aren't local.
+ 2: Symbol references are local.
+ */
+ unsigned int local_ref : 2;
+
+ /* TRUE if symbol is defined by linker. */
+ unsigned int linker_def : 1;
+
+ /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
+ only used by i386. */
unsigned int gotoff_ref : 1;
/* TRUE if a weak symbol with a real definition needs a copy reloc.
is only used by x86-64. */
unsigned int needs_copy : 1;
- /* TRUE if a symbol with GOTPCREL relocations which have been converted
- to R_X86_64_PC32, R_X86_64_32 or R_X86_64_32S. This is only used by
- x86-64 for now. */
- unsigned int converted_reloc : 1;
-
/* Reference count of C/C++ function pointer relocations in read-write
section which can be resolved at run-time. */
bfd_signed_vma func_pointer_refcount;
bfd_vma (*r_info) (bfd_vma, bfd_vma);
bfd_vma (*r_sym) (bfd_vma);
- bfd_boolean (*convert_load) (bfd *, asection *,
- struct bfd_link_info *);
bfd_boolean (*is_reloc_section) (const char *);
enum elf_target_id target_id;
unsigned int sizeof_reloc;
const char *tls_get_addr;
};
-struct elf_x86_plt_layout_table
+struct elf_x86_init_table
{
/* The lazy PLT layout. */
const struct elf_x86_lazy_plt_layout *lazy_plt;
/* TRUE if this is a VxWorks x86 target. */
bfd_boolean is_vxworks;
+
+ bfd_vma (*r_info) (bfd_vma, bfd_vma);
+ bfd_vma (*r_sym) (bfd_vma);
};
struct elf_x86_obj_tdata
&& elf_tdata (bfd) != NULL \
&& elf_object_id (bfd) == (htab)->target_id)
-extern bfd_boolean _bfd_i386_elf_convert_load
- (bfd *, asection *, struct bfd_link_info *);
-
-extern bfd_boolean _bfd_x86_64_elf_convert_load
- (bfd *, asection *, struct bfd_link_info *);
-
extern bfd_boolean _bfd_x86_elf_mkobject
(bfd *);
extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
(struct bfd_link_info *, struct elf_link_hash_entry *);
+extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
+ (struct bfd_link_info *, struct elf_link_hash_entry *);
+
extern asection * _bfd_x86_elf_gc_mark_hook
(asection *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *);
(struct bfd_link_info *, bfd *, elf_property *, elf_property *);
extern bfd * _bfd_x86_elf_link_setup_gnu_properties
- (struct bfd_link_info *, struct elf_x86_plt_layout_table *);
+ (struct bfd_link_info *, struct elf_x86_init_table *);
#define bfd_elf64_mkobject \
_bfd_x86_elf_mkobject
projects / deliverable / binutils-gdb.git / blobdiff