/* bfdlink.h -- header file for BFD link routines
- Copyright (C) 1993-2018 Free Software Foundation, Inc.
+ Copyright (C) 1993-2021 Free Software Foundation, Inc.
Written by Steve Chamberlain and Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
discard_all /* Discard all locals. */
};
+enum notice_asneeded_action {
+ notice_as_needed,
+ notice_not_needed,
+ notice_needed
+};
+
/* Whether to generate ELF common symbols with the STT_COMMON type
during a relocatable link. */
enum bfd_link_elf_stt_common
follows bfd_link_hash_indirect and bfd_link_hash_warning links to
the real symbol. */
extern struct bfd_link_hash_entry *bfd_link_hash_lookup
- (struct bfd_link_hash_table *, const char *, bfd_boolean create,
- bfd_boolean copy, bfd_boolean follow);
+ (struct bfd_link_hash_table *, const char *, bool create,
+ bool copy, bool follow);
/* Look up an entry in the main linker hash table if the symbol might
be wrapped. This should only be used for references to an
undefined symbol, not for definitions of a symbol. */
extern struct bfd_link_hash_entry *bfd_wrapped_link_hash_lookup
- (bfd *, struct bfd_link_info *, const char *, bfd_boolean,
- bfd_boolean, bfd_boolean);
+ (bfd *, struct bfd_link_info *, const char *, bool, bool, bool);
/* If H is a wrapped symbol, ie. the symbol name starts with "__wrap_"
and the remainder is found in wrap_hash, return the real symbol. */
/* Traverse a link hash table. */
extern void bfd_link_hash_traverse
(struct bfd_link_hash_table *,
- bfd_boolean (*) (struct bfd_link_hash_entry *, void *),
+ bool (*) (struct bfd_link_hash_entry *, void *),
void *);
/* Add an entry to the undefs list. */
(struct bfd_link_hash_table *table);
/* Read symbols and cache symbol pointer array in outsymbols. */
-extern bfd_boolean bfd_generic_link_read_symbols (bfd *);
+extern bool bfd_generic_link_read_symbols (bfd *);
/* Check the relocs in the BFD. Called after all the input
files have been loaded, and garbage collection has tagged
any unneeded sections. */
-extern bfd_boolean bfd_link_check_relocs (bfd *,struct bfd_link_info *);
+extern bool bfd_link_check_relocs (bfd *,struct bfd_link_info *);
struct bfd_sym_chain
{
allowed to set the value. */
RM_NOT_YET_SET = 0,
RM_IGNORE,
- RM_GENERATE_WARNING,
- RM_GENERATE_ERROR
+ RM_DIAGNOSE,
};
+/* How to handle DT_TEXTREL. */
+
+enum textrel_check_method
+{
+ textrel_check_none,
+ textrel_check_warning,
+ textrel_check_error
+};
+
+#define bfd_link_textrel_check(info) \
+ (info->textrel_check != textrel_check_none)
+
typedef enum {with_flags, without_flags} flag_type;
/* A section flag list. */
{
flag_type with;
const char *name;
- bfd_boolean valid;
+ bool valid;
struct flag_info_list *next;
};
flagword only_with_flags;
flagword not_with_flags;
struct flag_info_list *flag_list;
- bfd_boolean flags_initialized;
+ bool flags_initialized;
};
struct bfd_elf_dynamic_list;
/* TRUE if the LTO plugin is active. */
unsigned int lto_plugin_active: 1;
+ /* TRUE if all LTO IR symbols have been read. */
+ unsigned int lto_all_symbols_read : 1;
+
/* TRUE if global symbols in discarded sections should be stripped. */
unsigned int strip_discarded: 1;
/* TRUE if section groups should be resolved. */
unsigned int resolve_section_groups: 1;
+ /* Set if output file is big-endian, or if that is unknown, from
+ the command line or first input file endianness. */
+ unsigned int big_endian : 1;
+
/* Which symbols to strip. */
ENUM_BITFIELD (bfd_link_strip) strip : 2;
ENUM_BITFIELD (bfd_link_elf_stt_common) elf_stt_common : 2;
/* Criteria for skipping symbols when determining
- whether to include an object from an archive. */
+ whether to include an object from an archive. */
ENUM_BITFIELD (bfd_link_common_skip_ar_symbols) common_skip_ar_symbols : 2;
/* What to do with unresolved symbols in an object file.
The same defaults apply. */
ENUM_BITFIELD (report_method) unresolved_syms_in_shared_libs : 2;
+ /* TRUE if unresolved symbols are to be warned, rather than errored. */
+ unsigned int warn_unresolved_syms: 1;
+
/* TRUE if shared objects should be linked directly, not shared. */
unsigned int static_link: 1;
should be created. 1 for DWARF2 tables, 2 for compact tables. */
unsigned int eh_frame_hdr_type: 2;
- /* TRUE if we should warn when adding a DT_TEXTREL to a shared object. */
- unsigned int warn_shared_textrel: 1;
-
- /* TRUE if we should error when adding a DT_TEXTREL. */
- unsigned int error_textrel: 1;
+ /* What to do with DT_TEXTREL in output. */
+ ENUM_BITFIELD (textrel_check_method) textrel_check: 2;
/* TRUE if .hash section should be created. */
unsigned int emit_hash: 1;
statics. */
unsigned int task_link: 1;
- /* TRUE if ok to have multiple definition. */
+ /* TRUE if ok to have multiple definitions, without warning. */
unsigned int allow_multiple_definition: 1;
- /* TRUE if ok to have prohibit multiple definition of absolute symbols. */
+ /* TRUE if multiple definition of absolute symbols (eg. from -R) should
+ be reported. */
unsigned int prohibit_multiple_definition_absolute: 1;
+ /* TRUE if multiple definitions should only warn. */
+ unsigned int warn_multiple_definition: 1;
+
/* TRUE if ok to have version with no definition. */
unsigned int allow_undefined_version: 1;
been opened. */
unsigned int check_relocs_after_open_input: 1;
- /* TRUE if BND prefix in PLT entries is always generated. */
- unsigned int bndplt: 1;
-
- /* TRUE if IBT-enabled PLT entries should be generated. */
- unsigned int ibtplt: 1;
-
- /* TRUE if GNU_PROPERTY_X86_FEATURE_1_IBT should be generated. */
- unsigned int ibt: 1;
-
- /* TRUE if GNU_PROPERTY_X86_FEATURE_1_SHSTK should be generated. */
- unsigned int shstk: 1;
-
/* TRUE if generation of .interp/PT_INTERP should be suppressed. */
unsigned int nointerp: 1;
- /* TRUE if we shouldn't check relocation overflow. */
- unsigned int no_reloc_overflow_check: 1;
-
- /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */
- unsigned int call_nop_as_suffix : 1;
-
/* TRUE if common symbols should be treated as undefined. */
unsigned int inhibit_common_definition : 1;
- /* The 1-byte NOP for x86 call instruction. */
- char call_nop_byte;
+ /* TRUE if "-Map map" is passed to linker. */
+ unsigned int has_map_file : 1;
+
+ /* TRUE if "--enable-non-contiguous-regions" is passed to the
+ linker. */
+ unsigned int non_contiguous_regions : 1;
+
+ /* TRUE if "--enable-non-contiguous-regions-warnings" is passed to
+ the linker. */
+ unsigned int non_contiguous_regions_warnings : 1;
+
+ /* TRUE if all symbol names should be unique. */
+ unsigned int unique_symbol : 1;
/* Char that may appear as the first char of a symbol, but should be
skipped (like symbol_leading_char) when looking up symbols in
Normally these optimizations are disabled by default but some targets
prefer to enable them by default. So this field is a tri-state variable.
The values are:
-
+
zero: Enable the optimizations (either from --relax being specified on
the command line or the backend's before_allocation emulation function.
-
+
positive: The user has requested that these optimizations be disabled.
(Via the --no-relax command line option).
/* May be used to set DT_FLAGS_1 for ELF. */
bfd_vma flags_1;
+ /* May be used to set DT_GNU_FLAGS_1 for ELF. */
+ bfd_vma gnu_flags_1;
+
+ /* TRUE if references to __start_/__stop_ synthesized symbols do not
+ specially retain C identifier named sections. */
+ int start_stop_gc;
+
+ /* May be used to set ELF visibility for __start_* / __stop_. */
+ unsigned int start_stop_visibility;
+
+ /* The maximum page size for ELF. */
+ bfd_vma maxpagesize;
+
+ /* The common page size for ELF. */
+ bfd_vma commonpagesize;
+
/* Start and end of RELRO region. */
bfd_vma relro_start, relro_end;
struct bfd_elf_version_tree *version_info;
};
+/* Some forward-definitions used by some callbacks. */
+
+struct elf_strtab_hash;
+struct elf_internal_sym;
+
/* This structures holds a set of callback functions. These are called
by the BFD linker routines. */
BFD from which symbols should in fact be added in place of the
original BFD's symbols. Returns TRUE if the object should be
added, FALSE if it should be skipped. */
- bfd_boolean (*add_archive_element)
+ bool (*add_archive_element)
(struct bfd_link_info *, bfd *abfd, const char *name, bfd **subsbfd);
/* A function which is called when a symbol is found with multiple
definitions. H is the symbol which is defined multiple times.
relocatable file. NAME is the name of the symbol found. ABFD,
SECTION and VALUE are the value of the symbol. */
void (*constructor)
- (struct bfd_link_info *, bfd_boolean constructor, const char *name,
+ (struct bfd_link_info *, bool constructor, const char *name,
bfd *abfd, asection *sec, bfd_vma value);
/* A function which is called to issue a linker warning. For
example, this is called when there is a reference to a warning
a fatal error or not. In some cases SECTION may be NULL. */
void (*undefined_symbol)
(struct bfd_link_info *, const char *name, bfd *abfd,
- asection *section, bfd_vma address, bfd_boolean is_fatal);
+ asection *section, bfd_vma address, bool is_fatal);
/* A function which is called when a reloc overflow occurs. ENTRY is
the link hash table entry for the symbol the reloc is against.
NAME is the name of the local symbol or section the reloc is
if applicable. ABFD, SECTION and ADDRESS are the (new) value of
the symbol. If SECTION is bfd_und_section, this is a reference.
FLAGS are the symbol BSF_* flags. */
- bfd_boolean (*notice)
+ bool (*notice)
(struct bfd_link_info *, struct bfd_link_hash_entry *h,
struct bfd_link_hash_entry *inh,
bfd *abfd, asection *section, bfd_vma address, flagword flags);
/* This callback provides a chance for users of the BFD library to
override its decision about whether to place two adjacent sections
into the same segment. */
- bfd_boolean (*override_segment_assignment)
+ bool (*override_segment_assignment)
(struct bfd_link_info *, bfd * abfd,
asection * current_section, asection * previous_section,
- bfd_boolean new_segment);
+ bool new_segment);
+ /* This callback provides a chance for callers of the BFD to examine the
+ ELF (dynamic) string table once it is complete. */
+ void (*examine_strtab)
+ (struct elf_strtab_hash *symstrtab);
+ /* This callback is called just before a symbol is swapped out, so that the
+ CTF machinery can look up symbols during construction. The name is
+ already an external strtab offset at this point. */
+ void (*ctf_new_symbol)
+ (int symidx, struct elf_internal_sym *sym);
+ /* Likewise, for dynamic symbols. */
+ void (*ctf_new_dynsym)
+ (int symidx, struct elf_internal_sym *sym);
+ /* This callback should emit the CTF section into a non-loadable section in
+ the output BFD named .ctf or a name beginning with ".ctf.". */
+ void (*emit_ctf)
+ (void);
};
\f
/* The linker builds link_order structures which tell the code how to
struct bfd_link_order *next;
/* Type of link_order. */
enum bfd_link_order_type type;
- /* Offset within output section. */
+ /* Offset within output section in bytes. */
bfd_vma offset;
- /* Size within output section. */
+ /* Size within output section in octets. */
bfd_size_type size;
/* Type specific information. */
union
/* Allocate a new link_order for a section. */
extern struct bfd_link_order *bfd_new_link_order (bfd *, asection *);
+struct bfd_section_already_linked;
+
+extern bool bfd_section_already_linked_table_init (void);
+extern void bfd_section_already_linked_table_free (void);
+extern bool _bfd_handle_already_linked
+ (struct bfd_section *, struct bfd_section_already_linked *,
+ struct bfd_link_info *);
+
+extern struct bfd_section *_bfd_nearby_section
+ (bfd *, struct bfd_section *, bfd_vma);
+
+extern void _bfd_fix_excluded_sec_syms
+ (bfd *, struct bfd_link_info *);
+
/* These structures are used to describe version information for the
ELF linker. These structures could be manipulated entirely inside
BFD, but it would be a pain. Instead, the regular linker sets up
projects / thirdparty / binutils-gdb.git / blobdiff