Fix C-x 1 from gdb prompt

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

diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
index ccd2c35f871f2b32fe09f3d312d3339b84872545..242750fa581b3163f54efec9c1b81b3dad368171 100644 (file)
--- a/bfd/elf-bfd.h
+++ b/bfd/elf-bfd.h
@@ -1,5 +1,5 @@
 /* BFD back-end data structures for ELF files.
 /* BFD back-end data structures for ELF files.

-   Copyright (C) 1992-2019 Free Software Foundation, Inc.
+   Copyright (C) 1992-2020 Free Software Foundation, Inc.

    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.


@@ -156,9 +156,13 @@ struct elf_link_hash_entry
   /* Same, but tracks a procedure linkage table entry.  */
   union gotplt_union plt;
 
   /* Same, but tracks a procedure linkage table entry.  */
   union gotplt_union plt;
 

-  /* Symbol size.  */
+  /* Symbol size.  NB: All fields starting from here are cleared by
+    _bfd_elf_link_hash_newfunc.  */

   bfd_size_type size;
 
   bfd_size_type size;
 

+  /* Track dynamic relocs copied for this symbol.  */
+  struct elf_dyn_relocs *dyn_relocs;
+

   /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.).  */
   unsigned int type : 8;
 
   /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.).  */
   unsigned int type : 8;
 


@@ -536,6 +540,15 @@ struct bfd_link_needed_list
   const char *name;
 };
 
   const char *name;
 };
 

+enum elf_target_os
+{
+  is_normal,
+  is_symbian,  /* Symbian OS.  */
+  is_solaris,  /* Solaris.  */
+  is_vxworks,  /* VxWorks.  */
+  is_nacl      /* Native Client.  */
+};
+

 /* ELF linker hash table.  */
 
 struct elf_link_hash_table
 /* ELF linker hash table.  */
 
 struct elf_link_hash_table


@@ -557,6 +570,9 @@ struct elf_link_hash_table
      section symbols.  */
   bfd_boolean is_relocatable_executable;
 
      section symbols.  */
   bfd_boolean is_relocatable_executable;
 

+  /* TRUE if there are IFUNC resolvers.  */
+  bfd_boolean ifunc_resolvers;
+

   /* The BFD used to hold special sections created by the linker.
      This will be the first BFD found which requires these sections to
      be created.  */
   /* The BFD used to hold special sections created by the linker.
      This will be the first BFD found which requires these sections to
      be created.  */


@@ -635,10 +651,24 @@ struct elf_link_hash_table
 
   /* Cached first output tls section and size of PT_TLS segment.  */
   asection *tls_sec;
 
   /* Cached first output tls section and size of PT_TLS segment.  */
   asection *tls_sec;

-  bfd_size_type tls_size;
+  bfd_size_type tls_size;  /* Bytes.  */
+
+  /* The offset into splt of the PLT entry for the TLS descriptor
+     resolver.  Special values are 0, if not necessary (or not found
+     to be necessary yet), and -1 if needed but not determined
+     yet.  */
+  bfd_vma tlsdesc_plt;

 
 

-  /* A linked list of BFD's loaded in the link.  */
-  struct elf_link_loaded_list *loaded;
+  /* The GOT offset for the lazy trampoline.  Communicated to the
+     loader via DT_TLSDESC_GOT.  The magic value (bfd_vma) -1
+     indicates an offset is not allocated.  */
+  bfd_vma tlsdesc_got;
+
+  /* Target OS for linker output.  */
+  enum elf_target_os target_os;
+
+  /* A linked list of dynamic BFD's loaded in the link.  */
+  struct elf_link_loaded_list *dyn_loaded;

 
   /* Short-cuts to get to dynamic linker sections.  */
   asection *sgot;
 
   /* Short-cuts to get to dynamic linker sections.  */
   asection *sgot;


@@ -857,6 +887,9 @@ struct elf_backend_data
      extensions to elf_obj_tdata and elf_link_hash_table structures.  */
   enum elf_target_id target_id;
 
      extensions to elf_obj_tdata and elf_link_hash_table structures.  */
   enum elf_target_id target_id;
 

+  /* Target OS.  */
+  enum elf_target_os target_os;
+

   /* The ELF machine code (EM_xxxx) for this backend.  */
   int elf_machine_code;
 
   /* The ELF machine code (EM_xxxx) for this backend.  */
   int elf_machine_code;
 


@@ -955,7 +988,7 @@ struct elf_backend_data
   /* A function to convert machine dependent ELF section header flags to
      BFD internal section header flags.  */
   bfd_boolean (*elf_backend_section_flags)
   /* A function to convert machine dependent ELF section header flags to
      BFD internal section header flags.  */
   bfd_boolean (*elf_backend_section_flags)

-    (flagword *, const Elf_Internal_Shdr *);
+    (const Elf_Internal_Shdr *);

 
   /* A function that returns a struct containing ELF section flags and
      type for the given BFD section.   */
 
   /* A function that returns a struct containing ELF section flags and
      type for the given BFD section.   */


@@ -1083,6 +1116,12 @@ struct elf_backend_data
   bfd_boolean (*elf_backend_size_dynamic_sections)
     (bfd *output_bfd, struct bfd_link_info *info);
 
   bfd_boolean (*elf_backend_size_dynamic_sections)
     (bfd *output_bfd, struct bfd_link_info *info);
 

+  /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
+     ELF backend linker to strip zero-sized dynamic sections after
+     the section sizes have been set.  */
+  bfd_boolean (*elf_backend_strip_zero_sized_dynamic_sections)
+    (struct bfd_link_info *info);
+

   /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
      we keep to use as a base for relocs and symbols.  */
   void (*elf_backend_init_index_section)
   /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
      we keep to use as a base for relocs and symbols.  */
   void (*elf_backend_init_index_section)


@@ -1165,7 +1204,7 @@ struct elf_backend_data
 
   /* This function is called to modify program headers just before
      they are written.  */
 
   /* This function is called to modify program headers just before
      they are written.  */

-  bfd_boolean (*elf_backend_modify_program_headers)
+  bfd_boolean (*elf_backend_modify_headers)

     (bfd *, struct bfd_link_info *);
 
   /* This function is called to see if the PHDR header should be
     (bfd *, struct bfd_link_info *);
 
   /* This function is called to see if the PHDR header should be


@@ -1192,10 +1231,9 @@ struct elf_backend_data
   bfd_boolean (*gc_mark_extra_sections)
     (struct bfd_link_info *, elf_gc_mark_hook_fn);
 
   bfd_boolean (*gc_mark_extra_sections)
     (struct bfd_link_info *, elf_gc_mark_hook_fn);
 

-  /* This function, if defined, is called after the ELF headers have
-     been created.  This allows for things like the OS and ABI versions
-     to be changed.  */
-  void (*elf_backend_post_process_headers)
+  /* This function is called to initialise ELF file header info.
+     Customised versions can modify things like the OS and ABI version.  */
+  bfd_boolean (*elf_backend_init_file_header)

     (bfd *, struct bfd_link_info *);
 
   /* This function, if defined, prints a symbol to file and returns the
     (bfd *, struct bfd_link_info *);
 
   /* This function, if defined, prints a symbol to file and returns the


@@ -1377,6 +1415,8 @@ struct elf_backend_data
      int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
                                bfd_size_type len));
 
      int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
                                bfd_size_type len));
 

+  bfd_boolean (*elf_backend_core_find_build_id) (bfd *, bfd_vma);
+

   /* This function is used by `_bfd_elf_get_synthetic_symtab';
      see elf.c.  */
   bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
   /* This function is used by `_bfd_elf_get_synthetic_symtab';
      see elf.c.  */
   bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);


@@ -1502,6 +1542,22 @@ struct elf_backend_data
   /* Opcode representing no unwind.  */
   int (*cant_unwind_opcode) (struct bfd_link_info *);
 
   /* Opcode representing no unwind.  */
   int (*cant_unwind_opcode) (struct bfd_link_info *);
 

+  /* Called when emitting an ELF symbol whoes input version had an
+     ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
+     Returns the value to be installed in the ST_SHNDX field of the
+     emitted symbol.  If not defined, the value is left unchanged.  */
+  unsigned int (*symbol_section_index) (bfd *, elf_symbol_type *);
+  
+  /* Called when a section has extra reloc sections.  */
+  bfd_boolean (*init_secondary_reloc_section) (bfd *, Elf_Internal_Shdr *,
+                                              const char *, unsigned int);
+
+  /* Called when after loading the normal relocs for a section.  */
+  bfd_boolean (*slurp_secondary_relocs) (bfd *, asection *, asymbol **);
+
+  /* Called after writing the normal relocs for a section.  */
+  bfd_boolean (*write_secondary_relocs) (bfd *, asection *);
+

   /* This is non-zero if static TLS segments require a special alignment.  */
   unsigned static_tls_alignment;
 
   /* This is non-zero if static TLS segments require a special alignment.  */
   unsigned static_tls_alignment;
 


@@ -1936,7 +1992,7 @@ struct elf_obj_tdata
   struct sdt_note *sdt_note_head;
 
   Elf_Internal_Shdr **group_sect_ptr;
   struct sdt_note *sdt_note_head;
 
   Elf_Internal_Shdr **group_sect_ptr;

-  int num_group;
+  unsigned int num_group;

 
   /* Index into group_sect_ptr, updated by setup_group when finding a
      section's group.  Used to optimize subsequent group searches.  */
 
   /* Index into group_sect_ptr, updated by setup_group when finding a
      section's group.  Used to optimize subsequent group searches.  */


@@ -2060,7 +2116,7 @@ extern bfd_boolean _bfd_elf_copy_private_bfd_data
 extern bfd_boolean _bfd_elf_print_private_bfd_data
   (bfd *, void *);
 const char * _bfd_elf_get_symbol_version_string
 extern bfd_boolean _bfd_elf_print_private_bfd_data
   (bfd *, void *);
 const char * _bfd_elf_get_symbol_version_string

-  (bfd *, asymbol *, bfd_boolean *);
+  (bfd *, asymbol *, bfd_boolean, bfd_boolean *);

 extern void bfd_elf_print_symbol
   (bfd *, void *, asymbol *, bfd_print_symbol_type);
 
 extern void bfd_elf_print_symbol
   (bfd *, void *, asymbol *, bfd_print_symbol_type);
 


@@ -2303,6 +2359,8 @@ extern bfd_boolean _bfd_elf_compute_section_file_positions
   (bfd *, struct bfd_link_info *);
 extern file_ptr _bfd_elf_assign_file_position_for_section
   (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
   (bfd *, struct bfd_link_info *);
 extern file_ptr _bfd_elf_assign_file_position_for_section
   (Elf_Internal_Shdr *, file_ptr, bfd_boolean);

+extern bfd_boolean _bfd_elf_modify_headers
+  (bfd *, struct bfd_link_info *);

 
 extern bfd_boolean _bfd_elf_validate_reloc
   (bfd *, arelent *);
 
 extern bfd_boolean _bfd_elf_validate_reloc
   (bfd *, arelent *);


@@ -2387,13 +2445,13 @@ extern bfd_boolean _bfd_elf_setup_sections
 extern struct bfd_link_hash_entry *bfd_elf_define_start_stop
   (struct bfd_link_info *, const char *, asection *);
 
 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 bfd_boolean _bfd_elf_init_file_header (bfd *, struct bfd_link_info *);

 
 extern bfd_boolean _bfd_elf_final_write_processing (bfd *);
 
 
 extern bfd_boolean _bfd_elf_final_write_processing (bfd *);
 

-extern const bfd_target *bfd_elf32_object_p
+extern bfd_cleanup bfd_elf32_object_p

   (bfd *);
   (bfd *);

-extern const bfd_target *bfd_elf32_core_file_p
+extern bfd_cleanup bfd_elf32_core_file_p

   (bfd *);
 extern char *bfd_elf32_core_file_failing_command
   (bfd *);
   (bfd *);
 extern char *bfd_elf32_core_file_failing_command
   (bfd *);


@@ -2403,6 +2461,8 @@ extern bfd_boolean bfd_elf32_core_file_matches_executable_p
   (bfd *, bfd *);
 extern int bfd_elf32_core_file_pid
   (bfd *);
   (bfd *, bfd *);
 extern int bfd_elf32_core_file_pid
   (bfd *);

+extern bfd_boolean _bfd_elf32_core_find_build_id
+  (bfd *, bfd_vma);

 
 extern bfd_boolean bfd_elf32_swap_symbol_in
   (bfd *, const void *, const void *, Elf_Internal_Sym *);
 
 extern bfd_boolean bfd_elf32_swap_symbol_in
   (bfd *, const void *, const void *, Elf_Internal_Sym *);


@@ -2437,9 +2497,9 @@ extern void bfd_elf32_write_relocs
 extern bfd_boolean bfd_elf32_slurp_reloc_table
   (bfd *, asection *, asymbol **, bfd_boolean);
 
 extern bfd_boolean bfd_elf32_slurp_reloc_table
   (bfd *, asection *, asymbol **, bfd_boolean);
 

-extern const bfd_target *bfd_elf64_object_p
+extern bfd_cleanup bfd_elf64_object_p

   (bfd *);
   (bfd *);

-extern const bfd_target *bfd_elf64_core_file_p
+extern bfd_cleanup bfd_elf64_core_file_p

   (bfd *);
 extern char *bfd_elf64_core_file_failing_command
   (bfd *);
   (bfd *);
 extern char *bfd_elf64_core_file_failing_command
   (bfd *);


@@ -2449,6 +2509,8 @@ extern bfd_boolean bfd_elf64_core_file_matches_executable_p
   (bfd *, bfd *);
 extern int bfd_elf64_core_file_pid
   (bfd *);
   (bfd *, bfd *);
 extern int bfd_elf64_core_file_pid
   (bfd *);

+extern bfd_boolean _bfd_elf64_core_find_build_id
+  (bfd *, bfd_vma);

 
 extern bfd_boolean bfd_elf64_swap_symbol_in
   (bfd *, const void *, const void *, Elf_Internal_Sym *);
 
 extern bfd_boolean bfd_elf64_swap_symbol_in
   (bfd *, const void *, const void *, Elf_Internal_Sym *);


@@ -2497,6 +2559,10 @@ extern bfd_boolean bfd_elf_link_add_symbols
   (bfd *, struct bfd_link_info *);
 extern bfd_boolean _bfd_elf_add_dynamic_entry
   (struct bfd_link_info *, bfd_vma, bfd_vma);
   (bfd *, struct bfd_link_info *);
 extern bfd_boolean _bfd_elf_add_dynamic_entry
   (struct bfd_link_info *, bfd_vma, bfd_vma);

+extern bfd_boolean _bfd_elf_strip_zero_sized_dynamic_sections
+  (struct bfd_link_info *);
+extern int bfd_elf_add_dt_needed_tag
+  (bfd *, struct bfd_link_info *);

 extern bfd_boolean _bfd_elf_link_check_relocs
   (bfd *, struct bfd_link_info *);
 
 extern bfd_boolean _bfd_elf_link_check_relocs
   (bfd *, struct bfd_link_info *);
 


@@ -2705,6 +2771,8 @@ extern char *elfcore_write_aarch_sve
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_aarch_pauth
   (bfd *, char *, int *, const void *, int);
   (bfd *, char *, int *, const void *, int);
 extern char *elfcore_write_aarch_pauth
   (bfd *, char *, int *, const void *, int);

+extern char *elfcore_write_arc_v2
+  (bfd *, char *, int *, const void *, int);

 extern char *elfcore_write_lwpstatus
   (bfd *, char *, int *, long, int, const void *);
 extern char *elfcore_write_register_note
 extern char *elfcore_write_lwpstatus
   (bfd *, char *, int *, long, int, const void *);
 extern char *elfcore_write_register_note


@@ -2773,6 +2841,7 @@ extern bfd_boolean _bfd_elf_merge_object_attributes
 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);

+extern bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type, size_t);

 
 extern bfd_boolean _bfd_elf_parse_gnu_properties
   (bfd *, Elf_Internal_Note *);
 
 extern bfd_boolean _bfd_elf_parse_gnu_properties
   (bfd *, Elf_Internal_Note *);


@@ -2809,8 +2878,8 @@ extern bfd_boolean _bfd_elf_create_ifunc_sections
   (bfd *, struct bfd_link_info *);
 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
   (struct bfd_link_info *, struct elf_link_hash_entry *,
   (bfd *, struct bfd_link_info *);
 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
   (struct bfd_link_info *, struct elf_link_hash_entry *,

-   struct elf_dyn_relocs **, bfd_boolean *, unsigned int,
-   unsigned int, unsigned int, bfd_boolean);
+   struct elf_dyn_relocs **, unsigned int, unsigned int,
+   unsigned int, bfd_boolean);

 
 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
 
 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);


@@ -2822,14 +2891,31 @@ extern bfd_vma elf32_r_sym (bfd_vma);
 
 extern bfd_boolean is_debuginfo_file (bfd *);
 
 
 extern bfd_boolean is_debuginfo_file (bfd *);
 

+
+extern bfd_boolean _bfd_elf_init_secondary_reloc_section
+  (bfd *, Elf_Internal_Shdr *, const char *, unsigned int);
+extern bfd_boolean _bfd_elf_slurp_secondary_reloc_section
+  (bfd *, asection *, asymbol **);
+extern bfd_boolean _bfd_elf_copy_special_section_fields
+  (const bfd *, bfd *, const Elf_Internal_Shdr *, Elf_Internal_Shdr *);
+extern bfd_boolean _bfd_elf_write_secondary_reloc_section
+  (bfd *, asection *);
+extern unsigned int _bfd_elf_symbol_section_index
+  (bfd *, elf_symbol_type *);
+
+extern asection *_bfd_elf_readonly_dynrelocs
+  (struct elf_link_hash_entry *);
+extern bfd_boolean _bfd_elf_maybe_set_textrel
+  (struct elf_link_hash_entry *, void *);
+

 /* Large common section.  */
 extern asection _bfd_elf_large_com_section;
 
 /* Hash for local symbol with the first section id, ID, in the input
    file and the local symbol index, SYM.  */
 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
 /* Large common section.  */
 extern asection _bfd_elf_large_com_section;
 
 /* Hash for local symbol with the first section id, ID, in the input
    file and the local symbol index, SYM.  */
 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \

-  (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
-   ^ (SYM) ^ ((ID) >> 16))
+  (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
+   ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))

 
 /* This is the condition under which finish_dynamic_symbol will be called.
    If our finish_dynamic_symbol isn't called, we'll need to do something
 
 /* This is the condition under which finish_dynamic_symbol will be called.
    If our finish_dynamic_symbol isn't called, we'll need to do something


@@ -2891,8 +2977,9 @@ extern asection _bfd_elf_large_com_section;
       else if (!bfd_link_relocatable (info))                           \
        {                                                               \
          bfd_boolean err;                                              \
       else if (!bfd_link_relocatable (info))                           \
        {                                                               \
          bfd_boolean err;                                              \

-         err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR  \
-                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT);       \
+         err = (info->unresolved_syms_in_objects == RM_DIAGNOSE &&     \
+                !info->warn_unresolved_syms)                           \
+                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT;        \

          (*info->callbacks->undefined_symbol) (info,                   \
                                                h->root.root.string,    \
                                                input_bfd,              \
          (*info->callbacks->undefined_symbol) (info,                   \
                                                h->root.root.string,    \
                                                input_bfd,              \