/* BFD back-end data structures for ELF files.
- Copyright (C) 1992-2019 Free Software Foundation, Inc.
+ Copyright (C) 1992-2021 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
/* 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;
+ /* Track dynamic relocs copied for this symbol. */
+ struct elf_dyn_relocs *dyn_relocs;
+
/* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
unsigned int type : 8;
const char *name;
};
+enum elf_target_os
+{
+ is_normal,
+ is_symbian, /* Symbian OS. */
+ is_solaris, /* Solaris. */
+ is_vxworks, /* VxWorks. */
+ is_nacl /* Native Client. */
+};
+
+/* Used by bfd_sym_from_r_symndx to cache a small number of local
+ symbols. */
+#define LOCAL_SYM_CACHE_SIZE 32
+struct sym_cache
+{
+ bfd *abfd;
+ unsigned long indx[LOCAL_SYM_CACHE_SIZE];
+ Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
+};
+
/* ELF linker hash table. */
struct elf_link_hash_table
section symbols. */
bfd_boolean is_relocatable_executable;
+ /* TRUE if there are IFUNC resolvers. */
+ bfd_boolean ifunc_resolvers;
+
+ /* TRUE if DT_PLTGOT is a required dynamic tag. */
+ bfd_boolean dt_pltgot_required;
+
+ /* TRUE if DT_JMPREL is a required dynamic tag. */
+ bfd_boolean dt_jmprel_required;
+
/* 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. */
/* 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;
+
+ /* 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;
- /* A linked list of BFD's loaded in the link. */
- struct elf_link_loaded_list *loaded;
+ /* Small local sym cache. */
+ struct sym_cache sym_cache;
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
/* Returns TRUE if the hash table is a struct elf_link_hash_table. */
#define is_elf_hash_table(htab) \
(((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
-
-/* Used by bfd_sym_from_r_symndx to cache a small number of local
- symbols. */
-#define LOCAL_SYM_CACHE_SIZE 32
-struct sym_cache
-{
- bfd *abfd;
- unsigned long indx[LOCAL_SYM_CACHE_SIZE];
- Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
-};
\f
/* Constant information held for an ELF backend. */
(bfd *, const Elf_Internal_Rela *, bfd_byte *);
};
-#define elf_symbol_from(ABFD,S) \
- (((S)->the_bfd != NULL \
+#define elf_symbol_from(S) \
+ ((((S)->flags & BSF_SYNTHETIC) == 0 \
+ && (S)->the_bfd != NULL \
&& (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
&& (S)->the_bfd->tdata.elf_obj_data != 0) \
? (elf_symbol_type *) (S) \
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;
/* 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. */
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)
/* 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_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
/* Merge the backend specific symbol attribute. */
void (*elf_backend_merge_symbol_attribute)
- (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
- bfd_boolean);
+ (struct elf_link_hash_entry *, unsigned int, bfd_boolean, bfd_boolean);
/* This function, if defined, will return a string containing the
name of a target-specific dynamic tag. */
bfd_boolean (*elf_backend_write_section)
(bfd *, struct bfd_link_info *, asection *, bfd_byte *);
+ /* This function, if defined, returns TRUE if it is section symbols
+ only that are considered local for the purpose of partitioning the
+ symbol table into local and global symbols. This should be NULL
+ for most targets, in which case the correct thing will be done.
+ MIPS ELF, at least on the Irix 5, has special requirements. */
+ bfd_boolean (*elf_backend_elfsym_local_is_section)
+ (bfd *);
+
/* The level of IRIX compatibility we're striving for.
MIPS ELF specific function. */
irix_compat_t (*elf_backend_mips_irix_compat)
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 *);
/* 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 **, bfd_boolean);
+
+ /* 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;
/* Link from a text section to its .eh_frame_entry section. */
asection *eh_frame_entry;
+ /* TRUE if the section has secondary reloc sections associated with it.
+ FIXME: In the future it might be better to change this into a list
+ of secondary reloc sections, making lookup easier and faster. */
+ bfd_boolean has_secondary_relocs;
+
/* A pointer used for various section optimizations. */
void *sec_info;
};
bfd_boolean flags_init;
};
-/* Indicate if the bfd contains SHF_GNU_MBIND sections or symbols that
- have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE binding. Used
- to set the osabi field in the ELF header structure. */
+/* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
+ symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
+ binding. Used to set the osabi field in the ELF header structure. */
enum elf_gnu_osabi
{
elf_gnu_osabi_mbind = 1 << 0,
elf_gnu_osabi_ifunc = 1 << 1,
elf_gnu_osabi_unique = 1 << 2,
+ elf_gnu_osabi_retain = 1 << 3,
};
typedef struct elf_section_list
bfd_vma gp; /* The gp value */
unsigned int gp_size; /* The gp size */
unsigned int num_elf_sections; /* elf_sect_ptr size */
+ unsigned char *being_created;
/* A mapping from external symbols to entries in the linker hash
table, used when linking. This is indexed by the symbol index
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. */
ENUM_BITFIELD (dynamic_lib_link_class) dyn_lib_class : 4;
/* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
- ENUM_BITFIELD (elf_gnu_osabi) has_gnu_osabi : 3;
+ ENUM_BITFIELD (elf_gnu_osabi) has_gnu_osabi : 4;
/* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
property. */
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);
(struct elf_strtab_hash *, void *);
extern bfd_size_type _bfd_elf_strtab_size
(struct elf_strtab_hash *);
+extern bfd_size_type _bfd_elf_strtab_len
+ (struct elf_strtab_hash *);
extern bfd_size_type _bfd_elf_strtab_offset
(struct elf_strtab_hash *, size_t);
+extern const char * _bfd_elf_strtab_str
+ (struct elf_strtab_hash *, size_t idx, bfd_size_type *offset);
extern bfd_boolean _bfd_elf_strtab_emit
(bfd *, struct elf_strtab_hash *);
extern void _bfd_elf_strtab_finalize
(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 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 const bfd_target *bfd_elf32_object_p
+extern bfd_cleanup bfd_elf32_object_p
(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 *, 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_slurp_reloc_table
(bfd *, asection *, asymbol **, bfd_boolean);
-extern const bfd_target *bfd_elf64_object_p
+extern bfd_cleanup bfd_elf64_object_p
(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 *, 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 *);
(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 *);
(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 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 *);
(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 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 **, bfd_boolean);
+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 *);
+
+extern bfd_boolean _bfd_elf_add_dynamic_tags
+ (bfd *, struct bfd_link_info *, bfd_boolean);
+
/* 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
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, \
|| (H)->start_stop \
|| ((INFO)->dynamic && !(H)->dynamic)))
+/* Determine if a section contains CTF data, using its name. */
+static inline bfd_boolean
+bfd_section_is_ctf (const asection *sec)
+{
+ const char *name = bfd_section_name (sec);
+ return strncmp (name, ".ctf", 4) == 0 && (name[4] == 0 || name[4] == '.');
+}
+
#ifdef __cplusplus
}
#endif
projects / thirdparty / binutils-gdb.git / blobdiff