Disallow copy relocation against protected data symbol

[deliverable/binutils-gdb.git] / bfd / elf-bfd.h

diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index 820bc982af36e7afef5c63258cab3512c5766ee9..79b9dbc1807b79e1f4fccfa8b77be78b1bdbdc0d 100644 (file)
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -213,6 +213,9 @@ struct elf_link_hash_entry
   /* Symbol is defined by a shared library with non-default visibility
      in a read/write section.  */
   unsigned int protected_def : 1;
+  /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
+     SECNAME.  */
+  unsigned int start_stop : 1;
 
   /* String table index in .dynstr if this is a dynamic symbol.  */
   unsigned long dynstr_index;
@@ -243,7 +246,15 @@ struct elf_link_hash_entry
     struct bfd_elf_version_tree *vertree;
   } verinfo;
 
-  struct elf_link_virtual_table_entry *vtable;
+  union
+  {
+    /* For __start_SECNAME and __stop_SECNAME symbols, record the first
+       input section whose section name is SECNAME.  */
+    asection *start_stop_section;
+
+    /* Vtable information. */
+    struct elf_link_virtual_table_entry *vtable;
+  } u2;
 };
 
 /* Will references to this symbol always reference the symbol
@@ -1437,8 +1448,8 @@ struct elf_backend_data
                                                  unsigned int);
 
   /* Merge GNU properties.  Return TRUE if property is updated.  */
-  bfd_boolean (*merge_gnu_properties) (bfd *, elf_property *,
-                                      elf_property *);
+  bfd_boolean (*merge_gnu_properties) (struct bfd_link_info *, bfd *,
+                                      elf_property *, elf_property *);
 
   /* Set up GNU properties.  */
   bfd *(*setup_gnu_properties) (struct bfd_link_info *);
@@ -1876,21 +1887,27 @@ struct elf_obj_tdata
 
   /* An identifier used to distinguish different target
      specific extensions to this structure.  */
-  enum elf_target_id object_id;
+  ENUM_BITFIELD (elf_target_id) object_id : 6;
 
   /* Whether a dyanmic object was specified normally on the linker
      command line, or was specified when --as-needed was in effect,
      or was found via a DT_NEEDED entry.  */
-  enum dynamic_lib_link_class dyn_lib_class;
+  ENUM_BITFIELD (dynamic_lib_link_class) dyn_lib_class : 4;
+
+  /* Whether if the bfd contains symbols that have the STT_GNU_IFUNC
+     symbol type or STB_GNU_UNIQUE binding.  */
+  ENUM_BITFIELD (elf_gnu_symbols) has_gnu_symbols : 3;
+
+  /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
+     property.  */
+  unsigned int has_no_copy_on_protected : 1;
 
   /* Irix 5 often screws up the symbol table, sorting local symbols
      after global symbols.  This flag is set if the symbol table in
      this BFD appears to be screwed up.  If it is, we ignore the
      sh_info field in the symbol table header, and always read all the
      symbols.  */
-  bfd_boolean bad_symtab;
-
-  enum elf_gnu_symbols has_gnu_symbols;
+  unsigned int bad_symtab : 1;
 
   /* Information grabbed from an elf core file.  */
   struct core_elf_obj_tdata *core;
@@ -1945,6 +1962,8 @@ struct elf_obj_tdata
 #define elf_other_obj_attributes_proc(bfd) \
   (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
+#define elf_has_no_copy_on_protected(bfd) \
+  (elf_tdata(bfd) -> has_no_copy_on_protected)
 \f
 extern void _bfd_elf_swap_verdef_in
   (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
@@ -2262,6 +2281,9 @@ extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
 extern bfd_boolean _bfd_elf_setup_sections
   (bfd *);
 
+extern struct bfd_link_hash_entry *bfd_elf_define_start_stop
+  (struct bfd_link_info *, const char *, asection *);
+
 extern void _bfd_elf_post_process_headers (bfd * , struct bfd_link_info *);
 
 extern const bfd_target *bfd_elf32_object_p
@@ -2445,9 +2467,6 @@ extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
 extern bfd_boolean bfd_elf_gc_common_final_link
   (bfd *, struct bfd_link_info *);
 
-extern asection *_bfd_elf_is_start_stop
-  (const struct bfd_link_info *, struct elf_link_hash_entry *);
-
 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
   (bfd_vma, void *);
 
@@ -2522,6 +2541,10 @@ extern char *elfcore_write_s390_vxrs_low
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_s390_vxrs_high
   (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_s390_gs_cb
+  (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_s390_gs_bc
+  (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_arm_vfp
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_aarch_tls
@@ -2787,7 +2810,9 @@ extern asection _bfd_elf_large_com_section;
    library, if any.  A unique symbol can never be bound locally.  */
 #define SYMBOLIC_BIND(INFO, H) \
     (!(H)->unique_global \
-     && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
+     && ((INFO)->symbolic \
+        || (H)->start_stop \
+        || ((INFO)->dynamic && !(H)->dynamic)))
 
 #ifdef __cplusplus
 }