/* ldlang.h - linker command language support
- Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006
- Free Software Foundation, Inc.
+ Copyright (C) 1991-2021 Free Software Foundation, Inc.
- This file is part of GLD, the Gnu Linker.
+ This file is part of the GNU Binutils.
- GLD is free software; you can redistribute it and/or modify
+ This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
- GLD is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GLD; see the file COPYING. If not, write to the Free
- Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
#ifndef LDLANG_H
#define LDLANG_H
#define DEFAULT_MEMORY_REGION "*default*"
+#define SECTION_NAME_MAP_LENGTH (16)
+
typedef enum
{
lang_input_file_is_l_enum,
typedef struct statement_list
{
- union lang_statement_union *head;
- union lang_statement_union **tail;
+ union lang_statement_union * head;
+ union lang_statement_union ** tail;
} lang_statement_list_type;
+typedef struct memory_region_name_struct
+{
+ const char * name;
+ struct memory_region_name_struct * next;
+} lang_memory_region_name;
+
typedef struct memory_region_struct
{
- char *name;
+ lang_memory_region_name name_list;
struct memory_region_struct *next;
+ union etree_union *origin_exp;
bfd_vma origin;
bfd_size_type length;
+ union etree_union *length_exp;
bfd_vma current;
- bfd_size_type old_length;
+ union lang_statement_union *last_os;
flagword flags;
flagword not_flags;
bfd_boolean had_full_message;
} lang_memory_region_type;
+enum statement_enum
+{
+ lang_address_statement_enum,
+ lang_assignment_statement_enum,
+ lang_data_statement_enum,
+ lang_fill_statement_enum,
+ lang_group_statement_enum,
+ lang_input_section_enum,
+ lang_input_statement_enum,
+ lang_insert_statement_enum,
+ lang_output_section_statement_enum,
+ lang_output_statement_enum,
+ lang_padding_statement_enum,
+ lang_reloc_statement_enum,
+ lang_target_statement_enum,
+ lang_wild_statement_enum,
+ lang_constructors_statement_enum,
+ lang_object_symbols_statement_enum
+};
+
typedef struct lang_statement_header_struct
{
+ /* Next pointer for statement_list statement list. */
union lang_statement_union *next;
- enum statement_enum
- {
- lang_output_section_statement_enum,
- lang_assignment_statement_enum,
- lang_input_statement_enum,
- lang_address_statement_enum,
- lang_wild_statement_enum,
- lang_input_section_enum,
- lang_object_symbols_statement_enum,
- lang_fill_statement_enum,
- lang_data_statement_enum,
- lang_reloc_statement_enum,
- lang_target_statement_enum,
- lang_output_statement_enum,
- lang_padding_statement_enum,
- lang_group_statement_enum,
-
- lang_afile_asection_pair_statement_enum,
- lang_constructors_statement_enum
- } type;
+ enum statement_enum type;
} lang_statement_header_type;
typedef struct
enum section_type
{
normal_section,
+ first_overlay_section,
+ overlay_section,
noload_section,
noalloc_section
};
fill_type *fill;
union etree_union *addr_tree;
union etree_union *load_base;
+ union etree_union *section_alignment;
+ union etree_union *subsection_alignment;
/* If non-null, an expression to evaluate after setting the section's
size. The expression is evaluated inside REGION (above) with '.'
lang_output_section_phdr_list *phdrs;
unsigned int block_value;
- int subsection_alignment; /* Alignment of components. */
- int section_alignment; /* Alignment of start of section. */
int constraint;
flagword flags;
enum section_type sectype;
- unsigned int processed : 1;
+ unsigned int processed_vma : 1;
+ unsigned int processed_lma : 1;
unsigned int all_input_readonly : 1;
- unsigned int ignored : 1;
+ /* If this section should be ignored. */
+ unsigned int ignored : 1;
+ /* If this section should update "dot". Prevents section being ignored. */
+ unsigned int update_dot : 1;
+ /* If this section is after assignment to _end. */
+ unsigned int after_end : 1;
+ /* If this section uses the alignment of its input sections. */
+ unsigned int align_lma_with_input : 1;
+ /* If script has duplicate output section statements of the same name
+ create duplicate output sections. */
+ unsigned int dup_output : 1;
} lang_output_section_statement_type;
-typedef struct
-{
- lang_statement_header_type header;
-} lang_common_statement_type;
-
-typedef struct
-{
- lang_statement_header_type header;
-} lang_object_symbols_statement_type;
-
typedef struct
{
lang_statement_header_type header;
bfd_vma output_offset;
} lang_reloc_statement_type;
-typedef struct lang_input_statement_struct
+struct lang_input_statement_flags
{
- lang_statement_header_type header;
- /* Name of this file. */
- const char *filename;
- /* Name to use for the symbol giving address of text start.
- Usually the same as filename, but for a file spec'd with
- -l this is the -l switch itself rather than the filename. */
- const char *local_sym_name;
+ /* 1 means this file was specified in a -l option. */
+ unsigned int maybe_archive : 1;
- bfd *the_bfd;
-
- bfd_boolean closed;
- file_ptr passive_position;
-
- /* Symbol table of the file. */
- asymbol **asymbols;
- unsigned int symbol_count;
-
- /* Point to the next file - whatever it is, wanders up and down
- archives */
- union lang_statement_union *next;
-
- /* Point to the next file, but skips archive contents. */
- union lang_statement_union *next_real_file;
-
- bfd_boolean is_archive;
+ /* 1 means this file was specified in a -l:namespec option. */
+ unsigned int full_name_provided : 1;
/* 1 means search a set of directories for this file. */
- bfd_boolean search_dirs_flag;
+ unsigned int search_dirs : 1;
- /* 1 means this was found in a search directory marked as sysrooted,
- if search_dirs_flag is false, otherwise, that it should be
- searched in ld_sysroot before any other location, as long as it
- starts with a slash. */
- bfd_boolean sysrooted;
+ /* 1 means this was found when processing a script in the sysroot. */
+ unsigned int sysrooted : 1;
/* 1 means this is base file of incremental load.
Do not load this file's text or data.
Also default text_start to after this file's bss. */
- bfd_boolean just_syms_flag;
+ unsigned int just_syms : 1;
/* Whether to search for this entry as a dynamic archive. */
- bfd_boolean dynamic;
+ unsigned int dynamic : 1;
- /* Whether DT_NEEDED tags should be added for dynamic libraries in
- DT_NEEDED tags from this entry. */
- bfd_boolean add_needed;
+ /* Set if a DT_NEEDED tag should be added not just for the dynamic library
+ explicitly given by this entry but also for any dynamic libraries in
+ this entry's needed list. */
+ unsigned int add_DT_NEEDED_for_dynamic : 1;
- /* Whether this entry should cause a DT_NEEDED tag only when
- satisfying references from regular files, or always. */
- bfd_boolean as_needed;
+ /* Set if this entry should cause a DT_NEEDED tag only when some
+ regular file references its symbols (ie. --as-needed is in effect). */
+ unsigned int add_DT_NEEDED_for_regular : 1;
/* Whether to include the entire contents of an archive. */
- bfd_boolean whole_archive;
+ unsigned int whole_archive : 1;
+
+ /* Set when bfd opening is successful. */
+ unsigned int loaded : 1;
- bfd_boolean loaded;
+ unsigned int real : 1;
+
+ /* Set if the file does not exist. */
+ unsigned int missing_file : 1;
+
+ /* Set if reloading an archive or --as-needed lib. */
+ unsigned int reload : 1;
+
+#if BFD_SUPPORTS_PLUGINS
+ /* Set if the file was claimed by a plugin. */
+ unsigned int claimed : 1;
+
+ /* Set if the file was claimed from an archive. */
+ unsigned int claim_archive : 1;
+
+ /* Set if added by the lto plugin add_input_file callback. */
+ unsigned int lto_output : 1;
+#endif /* BFD_SUPPORTS_PLUGINS */
+
+ /* Head of list of pushed flags. */
+ struct lang_input_statement_flags *pushed;
+};
+
+typedef struct lang_input_statement_struct
+{
+ lang_statement_header_type header;
+ /* Name of this file. */
+ const char *filename;
+ /* Name to use for the symbol giving address of text start.
+ Usually the same as filename, but for a file spec'd with
+ -l this is the -l switch itself rather than the filename. */
+ const char *local_sym_name;
+ /* Extra search path. Used to find a file relative to the
+ directory of the current linker script. */
+ const char *extra_search_path;
+
+ bfd *the_bfd;
+
+ ctf_archive_t *the_ctf;
+
+ struct flag_info *section_flag_list;
+
+ /* Next pointer for file_chain statement list. */
+ struct lang_input_statement_struct *next;
+
+ /* Next pointer for input_file_chain statement list. */
+ struct lang_input_statement_struct *next_real_file;
const char *target;
- bfd_boolean real;
+
+ struct lang_input_statement_flags flags;
} lang_input_statement_type;
typedef struct
asection *section;
} lang_input_section_type;
-typedef struct
+struct map_symbol_def {
+ struct bfd_link_hash_entry *entry;
+ struct map_symbol_def *next;
+};
+
+/* For input sections, when writing a map file: head / tail of a linked
+ list of hash table entries for symbols defined in this section. */
+typedef struct input_section_userdata_struct
{
- lang_statement_header_type header;
- asection *section;
- union lang_statement_union *file;
-} lang_afile_asection_pair_statement_type;
+ struct map_symbol_def *map_symbol_def_head;
+ struct map_symbol_def **map_symbol_def_tail;
+ unsigned long map_symbol_def_count;
+} input_section_userdata_type;
+
+static inline bfd_boolean
+bfd_input_just_syms (const bfd *abfd)
+{
+ lang_input_statement_type *is = bfd_usrdata (abfd);
+ return is != NULL && is->flags.just_syms;
+}
typedef struct lang_wild_statement_struct lang_wild_statement_type;
typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
- asection *, lang_input_statement_type *, void *);
+ asection *, struct flag_info *,
+ lang_input_statement_type *, void *);
typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
lang_input_statement_type *,
typedef bfd_boolean (*lang_match_sec_type_func) (bfd *, const asection *,
bfd *, const asection *);
+/* Binary search tree structure to efficiently sort sections by
+ name. */
+typedef struct lang_section_bst
+{
+ asection *section;
+ struct lang_section_bst *left;
+ struct lang_section_bst *right;
+} lang_section_bst_type;
+
struct lang_wild_statement_struct
{
lang_statement_header_type header;
struct wildcard_list *section_list;
bfd_boolean keep_sections;
lang_statement_list_type children;
+ struct name_list *exclude_name_list;
walk_wild_section_handler_t walk_wild_section_handler;
struct wildcard_list *handler_data[4];
+ lang_section_bst_type *tree;
+ struct flag_info *section_flag_list;
};
typedef struct lang_address_statement_struct
{
lang_statement_header_type header;
bfd_vma output_offset;
- size_t size;
+ bfd_size_type size;
asection *output_section;
fill_type *fill;
} lang_padding_statement_type;
lang_statement_list_type children;
} lang_group_statement_type;
+typedef struct
+{
+ lang_statement_header_type header;
+ const char *where;
+ bfd_boolean is_before;
+} lang_insert_statement_type;
+
typedef union lang_statement_union
{
lang_statement_header_type header;
- lang_wild_statement_type wild_statement;
- lang_data_statement_type data_statement;
- lang_reloc_statement_type reloc_statement;
lang_address_statement_type address_statement;
- lang_output_section_statement_type output_section_statement;
- lang_afile_asection_pair_statement_type afile_asection_pair_statement;
lang_assignment_statement_type assignment_statement;
+ lang_data_statement_type data_statement;
+ lang_fill_statement_type fill_statement;
+ lang_group_statement_type group_statement;
+ lang_input_section_type input_section;
lang_input_statement_type input_statement;
- lang_target_statement_type target_statement;
+ lang_insert_statement_type insert_statement;
+ lang_output_section_statement_type output_section_statement;
lang_output_statement_type output_statement;
- lang_input_section_type input_section;
- lang_common_statement_type common_statement;
- lang_object_symbols_statement_type object_symbols_statement;
- lang_fill_statement_type fill_statement;
lang_padding_statement_type padding_statement;
- lang_group_statement_type group_statement;
+ lang_reloc_statement_type reloc_statement;
+ lang_target_statement_type target_statement;
+ lang_wild_statement_type wild_statement;
} lang_statement_union_type;
/* This structure holds information about a program header, from the
{
struct lang_nocrossrefs *next;
lang_nocrossref_type *list;
+ bfd_boolean onlyfirst;
};
-extern struct lang_nocrossrefs *nocrossref_list;
-
/* This structure is used to hold a list of input section names which
will not match an output section in the linker script. */
const char *name;
};
-/* This structure records symbols for which we need to keep track of
- definedness for use in the DEFINED () test. */
-
-struct lang_definedness_hash_entry
-{
- struct bfd_hash_entry root;
- int iteration;
-};
-
/* Used by place_orphan to keep track of orphan sections and statements. */
-struct orphan_save {
+struct orphan_save
+{
const char *name;
flagword flags;
lang_output_section_statement_type *os;
lang_output_section_statement_type **os_tail;
};
+struct asneeded_minfo
+{
+ struct asneeded_minfo *next;
+ const char *soname;
+ bfd *ref;
+ const char *name;
+};
+
+extern struct lang_phdr *lang_phdr_list;
+extern struct lang_nocrossrefs *nocrossref_list;
+extern const char *output_target;
extern lang_output_section_statement_type *abs_output_section;
-extern lang_statement_list_type lang_output_section_statement;
+extern lang_statement_list_type lang_os_list;
+extern struct lang_input_statement_flags input_flags;
extern bfd_boolean lang_has_input_file;
-extern etree_type *base;
extern lang_statement_list_type *stat_ptr;
extern bfd_boolean delete_output_file_on_failure;
extern const char *entry_section;
extern bfd_boolean entry_from_cmdline;
extern lang_statement_list_type file_chain;
+extern lang_statement_list_type input_file_chain;
+
+extern struct bfd_elf_dynamic_list **current_dynamic_list_p;
extern int lang_statement_iteration;
+extern struct asneeded_minfo **asneeded_list_tail;
+
+extern void (*output_bfd_hash_table_free_fn) (struct bfd_link_hash_table *);
extern void lang_init
(void);
extern void lang_finish
(void);
-extern lang_memory_region_type *lang_memory_region_lookup
- (const char *const, bfd_boolean);
-extern lang_memory_region_type *lang_memory_region_default
- (asection *);
+extern lang_memory_region_type * lang_memory_region_lookup
+ (const char * const, bfd_boolean);
+extern void lang_memory_region_alias
+ (const char *, const char *);
extern void lang_map
(void);
extern void lang_set_flags
extern void lang_add_output
(const char *, int from_script);
extern lang_output_section_statement_type *lang_enter_output_section_statement
- (const char *output_section_statement_name,
- etree_type *address_exp,
- enum section_type sectype,
- etree_type *align,
- etree_type *subalign,
- etree_type *, int);
+ (const char *, etree_type *, enum section_type, etree_type *, etree_type *,
+ etree_type *, int, int);
extern void lang_final
(void);
+extern void lang_relax_sections
+ (bfd_boolean);
extern void lang_process
(void);
extern void lang_section_start
extern void lang_leave_output_section_statement
(fill_type *, const char *, lang_output_section_phdr_list *,
const char *);
-extern void lang_abs_symbol_at_end_of
- (const char *, const char *);
-extern void lang_abs_symbol_at_beginning_of
- (const char *, const char *);
-extern void lang_statement_append
- (lang_statement_list_type *, lang_statement_union_type *,
- lang_statement_union_type **);
extern void lang_for_each_input_file
(void (*dothis) (lang_input_statement_type *));
extern void lang_for_each_file
extern void lang_reset_memory_regions
(void);
extern void lang_do_assignments
+ (lang_phase_type);
+extern asection *section_for_dot
(void);
#define LANG_FOR_EACH_INPUT_STATEMENT(statement) \
lang_input_statement_type *statement; \
for (statement = (lang_input_statement_type *) file_chain.head; \
- statement != (lang_input_statement_type *) NULL; \
- statement = (lang_input_statement_type *) statement->next) \
+ statement != NULL; \
+ statement = statement->next)
+
+#define lang_output_section_find(NAME) \
+ lang_output_section_statement_lookup (NAME, 0, 0)
extern void lang_process
(void);
extern void ldlang_add_file
(lang_input_statement_type *);
-extern lang_output_section_statement_type *lang_output_section_find
- (const char * const);
extern lang_output_section_statement_type *lang_output_section_find_by_flags
- (const asection *, lang_output_section_statement_type **,
+ (const asection *, flagword, lang_output_section_statement_type **,
lang_match_sec_type_func);
extern lang_output_section_statement_type *lang_insert_orphan
- (asection *, const char *, lang_output_section_statement_type *,
+ (asection *, const char *, int, lang_output_section_statement_type *,
struct orphan_save *, etree_type *, lang_statement_list_type *);
extern lang_input_statement_type *lang_add_input_file
(const char *, lang_input_file_enum_type, const char *);
extern void lang_add_keepsyms_file
(const char *);
-extern lang_output_section_statement_type *
- lang_output_section_statement_lookup
- (const char *const);
+extern lang_output_section_statement_type *lang_output_section_get
+ (const asection *);
+extern lang_output_section_statement_type *lang_output_section_statement_lookup
+ (const char *, int, int);
+extern lang_output_section_statement_type *next_matching_output_section_statement
+ (lang_output_section_statement_type *, int);
extern void ldlang_add_undef
+ (const char *const, bfd_boolean);
+extern void ldlang_add_require_defined
(const char *const);
extern void lang_add_output_format
(const char *, const char *, const char *, int);
extern void lang_list_init
(lang_statement_list_type *);
+extern void push_stat_ptr
+ (lang_statement_list_type *);
+extern void pop_stat_ptr
+ (void);
extern void lang_add_data
(int type, union etree_union *);
extern void lang_add_reloc
union etree_union *);
extern void lang_for_each_statement
(void (*) (lang_statement_union_type *));
+extern void lang_for_each_statement_worker
+ (void (*) (lang_statement_union_type *), lang_statement_union_type *);
extern void *stat_alloc
(size_t);
extern void strip_excluded_output_sections
(void);
+extern void lang_clear_os_map
+ (void);
extern void dprint_statement
(lang_statement_union_type *, int);
extern void lang_size_sections
(bfd_boolean *, bfd_boolean);
extern void one_lang_size_sections_pass
(bfd_boolean *, bfd_boolean);
+extern void lang_add_insert
+ (const char *, int);
extern void lang_enter_group
(void);
extern void lang_leave_group
(void);
extern void lang_add_section
(lang_statement_list_type *, asection *,
- lang_output_section_statement_type *);
+ struct flag_info *, lang_output_section_statement_type *);
extern void lang_new_phdr
(const char *, etree_type *, bfd_boolean, bfd_boolean, etree_type *,
etree_type *);
extern void lang_add_nocrossref
(lang_nocrossref_type *);
+extern void lang_add_nocrossref_to
+ (lang_nocrossref_type *);
extern void lang_enter_overlay
(etree_type *, etree_type *);
extern void lang_enter_overlay_section
(etree_type *, int, fill_type *, const char *,
lang_output_section_phdr_list *, const char *);
-extern struct bfd_elf_version_tree *lang_elf_version_info;
-
extern struct bfd_elf_version_expr *lang_new_vers_pattern
(struct bfd_elf_version_expr *, const char *, const char *, bfd_boolean);
extern struct bfd_elf_version_tree *lang_new_vers_node
(struct bfd_elf_version_deps *, const char *);
extern void lang_register_vers_node
(const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
-bfd_boolean unique_section_p
- (const asection *);
+extern void lang_append_dynamic_list (struct bfd_elf_dynamic_list **,
+ struct bfd_elf_version_expr *);
+extern void lang_append_dynamic_list_cpp_typeinfo (void);
+extern void lang_append_dynamic_list_cpp_new (void);
extern void lang_add_unique
(const char *);
extern const char *lang_get_output_target
(void);
-extern void lang_track_definedness (const char *);
-extern int lang_symbol_definition_iteration (const char *);
-extern void lang_update_definedness
- (const char *, struct bfd_link_hash_entry *);
-
extern void add_excluded_libs (const char *);
+extern bfd_boolean load_symbols
+ (lang_input_statement_type *, lang_statement_list_type *);
+
+struct elf_sym_strtab;
+struct elf_strtab_hash;
+extern void ldlang_ctf_acquire_strings
+ (struct elf_strtab_hash *);
+extern void ldlang_ctf_new_dynsym
+ (int symidx, struct elf_internal_sym *);
+extern void ldlang_write_ctf_late
+ (void);
+extern bfd_boolean
+ldlang_override_segment_assignment
+ (struct bfd_link_info *, bfd *, asection *, asection *, bfd_boolean);
+
+extern void
+lang_ld_feature (char *);
+
+extern void
+lang_print_memory_usage (void);
+
+extern void
+lang_add_gc_name (const char *);
+
+extern bfd_boolean
+print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr);
#endif
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