/* BFD back-end data structures for ELF files.
- Copyright (C) 1992-2015 Free Software Foundation, Inc.
+ Copyright (C) 1992-2016 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
struct bfd_link_hash_entry root;
/* Symbol index in output file. This is initialized to -1. It is
- set to -2 if the symbol is used by a reloc. */
+ set to -2 if the symbol is used by a reloc. It is set to -3 if
+ this symbol is defined in a discarded section. */
long indx;
/* Symbol index as a dynamic symbol. Initialized to -1, and remains
{
AARCH64_ELF_DATA = 1,
ALPHA_ELF_DATA,
+ ARC_ELF_DATA,
ARM_ELF_DATA,
AVR_ELF_DATA,
BFIN_ELF_DATA,
XGATE_ELF_DATA,
TILEGX_ELF_DATA,
TILEPRO_ELF_DATA,
+ RISCV_ELF_DATA,
GENERIC_ELF_DATA
};
union gotplt_union init_got_offset;
union gotplt_union init_plt_offset;
- /* The number of symbols found in the link which must be put into
- the .dynsym section. */
+ /* The number of symbols found in the link which is intended for the
+ mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
bfd_size_type dynsymcount;
+ bfd_size_type local_dynsymcount;
/* The string table of dynamic symbols, which becomes the .dynstr
section. */
enum elf_reloc_type_class {
reloc_class_normal,
reloc_class_relative,
- reloc_class_plt,
reloc_class_copy,
- reloc_class_ifunc
+ reloc_class_ifunc,
+ reloc_class_plt
};
struct elf_reloc_cookie
struct bfd_elf_special_section
{
const char *prefix;
- int prefix_length;
+ unsigned int prefix_length;
/* 0 means name must match PREFIX exactly.
-1 means name must start with PREFIX followed by an arbitrary string.
-2 means name must match PREFIX exactly or consist of PREFIX followed
by a dot then anything.
> 0 means name must start with the first PREFIX_LENGTH chars of
PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
- int suffix_length;
- int type;
+ signed int suffix_length;
+ unsigned int type;
bfd_vma attr;
};
(asection *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *);
+struct bfd_elf_section_reloc_data;
+
struct elf_backend_data
{
/* The architecture for this backend. */
/* The ELF machine code (EM_xxxx) for this backend. */
int elf_machine_code;
- /* EI_OSABI. */
+ /* EI_OSABI. */
int elf_osabi;
/* The maximum page size for this backend. */
bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
struct elf_link_hash_entry *));
+ /* Filter what symbols of the output file to include in the import
+ library if one is created. */
+ unsigned int (*elf_backend_filter_implib_symbols)
+ (bfd *, struct bfd_link_info *, asymbol **, long);
+
/* Copy any information related to dynamic linking from a pre-existing
symbol to a newly created symbol. Also called to copy flags and
other back-end info to a weakdef, in which case the symbol is not
(bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
struct elf_link_hash_entry **);
+ /* Update relocations. It is allowed to change the number and the order.
+ In such a case hashes should be invalidated. */
+ void (*elf_backend_update_relocs)
+ (asection *, struct bfd_elf_section_reloc_data *);
+
/* Count relocations. Not called for relocatable links
or if all relocs are being preserved in the output. */
unsigned int (*elf_backend_count_relocs)
(struct bfd_link_info *, asection *);
+ /* Count additionals relocations. Called for relocatable links if
+ additional relocations needs to be created. */
+ unsigned int (*elf_backend_count_additional_relocs)
+ (asection *);
+
/* Say whether to sort relocs output by ld -r and ld --emit-relocs,
by r_offset. If NULL, default to true. */
bfd_boolean (*sort_relocs_p)
/* Return the section which RELOC_SEC applies to. */
asection *(*get_reloc_section) (asection *reloc_sec);
+ /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
+ has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
+ FALSE otherwise. Can be called multiple times for a given section,
+ until it returns TRUE. Most of the times it is called ISECTION will be
+ set to an input section that might be associated with the output section.
+ The last time that it is called, ISECTION will be set to NULL. */
+ bfd_boolean (*elf_backend_copy_special_section_fields)
+ (const bfd *ibfd, bfd *obfd, const Elf_Internal_Shdr *isection,
+ Elf_Internal_Shdr *osection);
+
/* Used to handle bad SHF_LINK_ORDER input. */
- bfd_error_handler_type link_order_error_handler;
+ void (*link_order_error_handler) (const char *, ...);
/* Name of the PLT relocation section. */
const char *relplt_name;
/* This is non-zero if static TLS segments require a special alignment. */
unsigned static_tls_alignment;
- /* Alignment for the PT_GNU_STACK segment. */
+ /* Alignment for the PT_GNU_STACK segment. */
unsigned stack_align;
+ /* Flag bits to assign to a section of type SHT_STRTAB. */
+ unsigned long elf_strtab_flags;
+
/* This is TRUE if the linker should act like collect and gather
global constructors and destructors by name. This is TRUE for
MIPS ELF because the Irix 5 tools can not handle the .init
backend relocate_section routine for relocatable linking. */
unsigned rela_normal : 1;
+ /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
+ relocations. */
+ unsigned dtrel_excludes_plt : 1;
+
/* TRUE if addresses "naturally" sign extend. This is used when
swapping in from Elf32 when BFD64. */
unsigned sign_extend_vma : 1;
symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
field in the ELF header structure. */
enum elf_gnu_symbols
- {
- elf_gnu_symbol_none = 0,
- elf_gnu_symbol_any = 1 << 0,
- elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
- elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
- elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
- };
+{
+ elf_gnu_symbol_none = 0,
+ elf_gnu_symbol_any = 1 << 0,
+ elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
+ elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
+ elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
+};
typedef struct elf_section_list
{
unsigned int ndx;
struct elf_section_list * next;
} elf_section_list;
-
-
+
/* Some private data is stashed away for future use using the tdata pointer
in the bfd structure. */
(bfd *, asection *, struct bfd_link_info *);
extern void bfd_elf_set_group_contents
(bfd *, asection *, void *);
+extern unsigned int _bfd_elf_filter_global_symbols
+ (bfd *, struct bfd_link_info *, asymbol **, long);
extern asection *_bfd_elf_check_kept_section
(asection *, struct bfd_link_info *);
#define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
(bfd *, asymbol **, asymbol *, const char **, unsigned int *);
extern bfd_boolean _bfd_elf_find_inliner_info
(bfd *, const char **, const char **, unsigned int *);
-extern bfd_boolean _bfd_elf_find_function
+extern asymbol *_bfd_elf_find_function
(bfd *, asymbol **, asection *, bfd_vma, const char **, const char **);
#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
(void);
extern void _bfd_elf_strtab_free
(struct elf_strtab_hash *);
-extern bfd_size_type _bfd_elf_strtab_add
+extern size_t _bfd_elf_strtab_add
(struct elf_strtab_hash *, const char *, bfd_boolean);
extern void _bfd_elf_strtab_addref
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *, size_t);
extern void _bfd_elf_strtab_delref
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *, size_t);
extern unsigned int _bfd_elf_strtab_refcount
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *, size_t);
extern void _bfd_elf_strtab_clear_all_refs
- (struct elf_strtab_hash *tab);
-extern void _bfd_elf_strtab_restore_size
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *);
+extern void *_bfd_elf_strtab_save
+ (struct elf_strtab_hash *);
+extern void _bfd_elf_strtab_restore
+ (struct elf_strtab_hash *, void *);
extern bfd_size_type _bfd_elf_strtab_size
(struct elf_strtab_hash *);
extern bfd_size_type _bfd_elf_strtab_offset
- (struct elf_strtab_hash *, bfd_size_type);
+ (struct elf_strtab_hash *, size_t);
extern bfd_boolean _bfd_elf_strtab_emit
(bfd *, struct elf_strtab_hash *);
extern void _bfd_elf_strtab_finalize
(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_link_check_relocs
+ (bfd *, struct bfd_link_info *);
extern bfd_boolean bfd_elf_link_record_dynamic_symbol
(struct bfd_link_info *, struct elf_link_hash_entry *);
extern asection *_bfd_elf_gc_mark_rsec
(struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
- struct elf_reloc_cookie *);
+ struct elf_reloc_cookie *, bfd_boolean *);
extern bfd_boolean _bfd_elf_gc_mark_reloc
(struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
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 *);
extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
(bfd * abfd, asection * section);
-/* Exported interface for writing elf corefile notes. */
+/* PowerPC @tls opcode transform/validate. */
+extern unsigned int _bfd_elf_ppc_at_tls_transform
+ (unsigned int, unsigned int);
+/* PowerPC @tprel opcode transform/validate. */
+extern unsigned int _bfd_elf_ppc_at_tprel_transform
+ (unsigned int, unsigned int);
+/* PowerPC elf_object_p tweak. */
+extern bfd_boolean _bfd_elf_ppc_set_arch (bfd *);
+/* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
+extern void _bfd_elf_ppc_merge_fp_attributes (bfd *, struct bfd_link_info *);
+
+/* Exported interface for writing elf corefile notes. */
extern char *elfcore_write_note
(bfd *, char *, int *, const char *, int, const void *, int);
extern char *elfcore_write_prpsinfo
extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, unsigned int);
extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
-extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
+extern bfd_boolean _bfd_elf_merge_object_attributes
+ (bfd *, struct bfd_link_info *);
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);
(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 **, unsigned int, unsigned int, unsigned int);
+ struct elf_dyn_relocs **, bfd_boolean *, unsigned int,
+ unsigned int, unsigned int, bfd_boolean);
extern long _bfd_elf_ifunc_get_synthetic_symtab
(bfd *, long, asymbol **, long, asymbol **, asymbol **, asection *,
bfd_vma *(*) (bfd *, asymbol **, asection *, asection *));
bfd_boolean err; \
err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
|| ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
- if (!info->callbacks->undefined_symbol (info, \
- h->root.root.string, \
- input_bfd, \
- input_section, \
- rel->r_offset, err)) \
- return FALSE; \
+ (*info->callbacks->undefined_symbol) (info, \
+ h->root.root.string, \
+ input_bfd, \
+ input_section, \
+ rel->r_offset, err); \
warned = TRUE; \
} \
(void) unresolved_reloc; \
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