608 lines
17 KiB
C
608 lines
17 KiB
C
/* ldlang.h - linker command language support
|
|
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
|
|
2001, 2002, 2003, 2004, 2005
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of GLD, the Gnu Linker.
|
|
|
|
GLD 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.
|
|
|
|
GLD 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. */
|
|
|
|
#ifndef LDLANG_H
|
|
#define LDLANG_H
|
|
|
|
#define DEFAULT_MEMORY_REGION "*default*"
|
|
|
|
typedef enum
|
|
{
|
|
lang_input_file_is_l_enum,
|
|
lang_input_file_is_symbols_only_enum,
|
|
lang_input_file_is_marker_enum,
|
|
lang_input_file_is_fake_enum,
|
|
lang_input_file_is_search_file_enum,
|
|
lang_input_file_is_file_enum
|
|
} lang_input_file_enum_type;
|
|
|
|
struct _fill_type
|
|
{
|
|
size_t size;
|
|
unsigned char data[1];
|
|
};
|
|
|
|
typedef struct statement_list
|
|
{
|
|
union lang_statement_union *head;
|
|
union lang_statement_union **tail;
|
|
} lang_statement_list_type;
|
|
|
|
typedef struct memory_region_struct
|
|
{
|
|
char *name;
|
|
struct memory_region_struct *next;
|
|
bfd_vma origin;
|
|
bfd_size_type length;
|
|
bfd_vma current;
|
|
bfd_size_type old_length;
|
|
flagword flags;
|
|
flagword not_flags;
|
|
bfd_boolean had_full_message;
|
|
} lang_memory_region_type;
|
|
|
|
typedef struct lang_statement_header_struct
|
|
{
|
|
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;
|
|
} lang_statement_header_type;
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
union etree_union *exp;
|
|
} lang_assignment_statement_type;
|
|
|
|
typedef struct lang_target_statement_struct
|
|
{
|
|
lang_statement_header_type header;
|
|
const char *target;
|
|
} lang_target_statement_type;
|
|
|
|
typedef struct lang_output_statement_struct
|
|
{
|
|
lang_statement_header_type header;
|
|
const char *name;
|
|
} lang_output_statement_type;
|
|
|
|
/* Section types specified in a linker script. */
|
|
|
|
enum section_type
|
|
{
|
|
normal_section,
|
|
dsect_section,
|
|
copy_section,
|
|
noload_section,
|
|
info_section,
|
|
overlay_section
|
|
};
|
|
|
|
/* This structure holds a list of program headers describing
|
|
segments in which this section should be placed. */
|
|
|
|
typedef struct lang_output_section_phdr_list
|
|
{
|
|
struct lang_output_section_phdr_list *next;
|
|
const char *name;
|
|
bfd_boolean used;
|
|
} lang_output_section_phdr_list;
|
|
|
|
typedef struct lang_output_section_statement_struct
|
|
{
|
|
lang_statement_header_type header;
|
|
union etree_union *addr_tree;
|
|
lang_statement_list_type children;
|
|
const char *memspec;
|
|
struct lang_output_section_statement_struct *next;
|
|
const char *name;
|
|
|
|
int processed;
|
|
|
|
asection *bfd_section;
|
|
flagword flags; /* Or together of all input sections. */
|
|
enum section_type sectype;
|
|
lang_memory_region_type *region;
|
|
lang_memory_region_type *lma_region;
|
|
size_t block_value;
|
|
fill_type *fill;
|
|
|
|
int subsection_alignment; /* Alignment of components. */
|
|
int section_alignment; /* Alignment of start of section. */
|
|
int constraint;
|
|
unsigned int all_input_readonly : 1;
|
|
unsigned int ignored : 1;
|
|
|
|
union etree_union *load_base;
|
|
|
|
/* If non-null, an expression to evaluate after setting the section's
|
|
size. The expression is evaluated inside REGION (above) with '.'
|
|
set to the end of the section. Used in the last overlay section
|
|
to move '.' past all the overlaid sections. */
|
|
union etree_union *update_dot_tree;
|
|
|
|
lang_output_section_phdr_list *phdrs;
|
|
} 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;
|
|
fill_type *fill;
|
|
int size;
|
|
asection *output_section;
|
|
} lang_fill_statement_type;
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
unsigned int type;
|
|
union etree_union *exp;
|
|
bfd_vma value;
|
|
asection *output_section;
|
|
bfd_vma output_vma;
|
|
} lang_data_statement_type;
|
|
|
|
/* Generate a reloc in the output file. */
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
|
|
/* Reloc to generate. */
|
|
bfd_reloc_code_real_type reloc;
|
|
|
|
/* Reloc howto structure. */
|
|
reloc_howto_type *howto;
|
|
|
|
/* Section to generate reloc against.
|
|
Exactly one of section and name must be NULL. */
|
|
asection *section;
|
|
|
|
/* Name of symbol to generate reloc against.
|
|
Exactly one of section and name must be NULL. */
|
|
const char *name;
|
|
|
|
/* Expression for addend. */
|
|
union etree_union *addend_exp;
|
|
|
|
/* Resolved addend. */
|
|
bfd_vma addend_value;
|
|
|
|
/* Output section where reloc should be performed. */
|
|
asection *output_section;
|
|
|
|
/* VMA within output section. */
|
|
bfd_vma output_vma;
|
|
} lang_reloc_statement_type;
|
|
|
|
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;
|
|
|
|
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 search a set of directories for this file. */
|
|
bfd_boolean search_dirs_flag;
|
|
|
|
/* 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 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;
|
|
|
|
/* Whether to search for this entry as a dynamic archive. */
|
|
bfd_boolean dynamic;
|
|
|
|
/* Whether DT_NEEDED tags should be added for dynamic libraries in
|
|
DT_NEEDED tags from this entry. */
|
|
bfd_boolean add_needed;
|
|
|
|
/* Whether this entry should cause a DT_NEEDED tag only when
|
|
satisfying references from regular files, or always. */
|
|
bfd_boolean as_needed;
|
|
|
|
/* Whether to include the entire contents of an archive. */
|
|
bfd_boolean whole_archive;
|
|
|
|
bfd_boolean loaded;
|
|
|
|
const char *target;
|
|
bfd_boolean real;
|
|
} lang_input_statement_type;
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
asection *section;
|
|
lang_input_statement_type *ifile;
|
|
|
|
} lang_input_section_type;
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
asection *section;
|
|
union lang_statement_union *file;
|
|
} lang_afile_asection_pair_statement_type;
|
|
|
|
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 *);
|
|
|
|
typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
|
|
lang_input_statement_type *,
|
|
callback_t callback,
|
|
void *data);
|
|
|
|
struct lang_wild_statement_struct
|
|
{
|
|
lang_statement_header_type header;
|
|
const char *filename;
|
|
bfd_boolean filenames_sorted;
|
|
struct wildcard_list *section_list;
|
|
bfd_boolean keep_sections;
|
|
lang_statement_list_type children;
|
|
|
|
walk_wild_section_handler_t walk_wild_section_handler;
|
|
struct wildcard_list *handler_data[4];
|
|
};
|
|
|
|
typedef struct lang_address_statement_struct
|
|
{
|
|
lang_statement_header_type header;
|
|
const char *section_name;
|
|
union etree_union *address;
|
|
const segment_type *segment;
|
|
} lang_address_statement_type;
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
bfd_vma output_offset;
|
|
size_t size;
|
|
asection *output_section;
|
|
fill_type *fill;
|
|
} lang_padding_statement_type;
|
|
|
|
/* A group statement collects a set of libraries together. The
|
|
libraries are searched multiple times, until no new undefined
|
|
symbols are found. The effect is to search a group of libraries as
|
|
though they were a single library. */
|
|
|
|
typedef struct
|
|
{
|
|
lang_statement_header_type header;
|
|
lang_statement_list_type children;
|
|
} lang_group_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_input_statement_type input_statement;
|
|
lang_target_statement_type target_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_statement_union_type;
|
|
|
|
/* This structure holds information about a program header, from the
|
|
PHDRS command in the linker script. */
|
|
|
|
struct lang_phdr
|
|
{
|
|
struct lang_phdr *next;
|
|
const char *name;
|
|
unsigned long type;
|
|
bfd_boolean filehdr;
|
|
bfd_boolean phdrs;
|
|
etree_type *at;
|
|
etree_type *flags;
|
|
};
|
|
|
|
/* This structure is used to hold a list of sections which may not
|
|
cross reference each other. */
|
|
|
|
typedef struct lang_nocrossref
|
|
{
|
|
struct lang_nocrossref *next;
|
|
const char *name;
|
|
} lang_nocrossref_type;
|
|
|
|
/* The list of nocrossref lists. */
|
|
|
|
struct lang_nocrossrefs
|
|
{
|
|
struct lang_nocrossrefs *next;
|
|
lang_nocrossref_type *list;
|
|
};
|
|
|
|
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. */
|
|
|
|
struct unique_sections
|
|
{
|
|
struct unique_sections *next;
|
|
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 {
|
|
const char *name;
|
|
flagword flags;
|
|
lang_output_section_statement_type *os;
|
|
asection **section;
|
|
lang_statement_union_type **stmt;
|
|
lang_output_section_statement_type **os_tail;
|
|
};
|
|
|
|
extern lang_output_section_statement_type *abs_output_section;
|
|
extern lang_statement_list_type lang_output_section_statement;
|
|
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 struct bfd_sym_chain entry_symbol;
|
|
extern const char *entry_section;
|
|
extern bfd_boolean entry_from_cmdline;
|
|
extern lang_statement_list_type file_chain;
|
|
|
|
extern int lang_statement_iteration;
|
|
|
|
extern void lang_init
|
|
(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 void lang_map
|
|
(void);
|
|
extern void lang_set_flags
|
|
(lang_memory_region_type *, const char *, int);
|
|
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);
|
|
extern void lang_final
|
|
(void);
|
|
extern void lang_process
|
|
(void);
|
|
extern void lang_section_start
|
|
(const char *, union etree_union *, const segment_type *);
|
|
extern void lang_add_entry
|
|
(const char *, bfd_boolean);
|
|
extern void lang_default_entry
|
|
(const char *);
|
|
extern void lang_add_target
|
|
(const char *);
|
|
extern void lang_add_wild
|
|
(struct wildcard_spec *, struct wildcard_list *, bfd_boolean);
|
|
extern void lang_add_map
|
|
(const char *);
|
|
extern void lang_add_fill
|
|
(fill_type *);
|
|
extern lang_assignment_statement_type *lang_add_assignment
|
|
(union etree_union *);
|
|
extern void lang_add_attribute
|
|
(enum statement_enum);
|
|
extern void lang_startup
|
|
(const char *);
|
|
extern void lang_float
|
|
(bfd_boolean);
|
|
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
|
|
(void (*dothis) (lang_input_statement_type *));
|
|
extern void lang_reset_memory_regions
|
|
(void);
|
|
extern void lang_do_assignments
|
|
(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) \
|
|
|
|
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 **exact);
|
|
extern lang_output_section_statement_type *lang_insert_orphan
|
|
(lang_input_statement_type *, asection *, const char *,
|
|
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 void ldlang_add_undef
|
|
(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 lang_add_data
|
|
(int type, union etree_union *);
|
|
extern void lang_add_reloc
|
|
(bfd_reloc_code_real_type, reloc_howto_type *, asection *, const char *,
|
|
union etree_union *);
|
|
extern void lang_for_each_statement
|
|
(void (*) (lang_statement_union_type *));
|
|
extern void *stat_alloc
|
|
(size_t);
|
|
extern void strip_excluded_output_sections
|
|
(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_enter_group
|
|
(void);
|
|
extern void lang_leave_group
|
|
(void);
|
|
extern void lang_add_section
|
|
(lang_statement_list_type *, asection *,
|
|
lang_output_section_statement_type *, lang_input_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_enter_overlay
|
|
(etree_type *, etree_type *);
|
|
extern void lang_enter_overlay_section
|
|
(const char *);
|
|
extern void lang_leave_overlay_section
|
|
(fill_type *, lang_output_section_phdr_list *);
|
|
extern void lang_leave_overlay
|
|
(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 *);
|
|
extern struct bfd_elf_version_tree *lang_new_vers_node
|
|
(struct bfd_elf_version_expr *, struct bfd_elf_version_expr *);
|
|
extern struct bfd_elf_version_deps *lang_add_vers_depend
|
|
(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_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 *);
|
|
|
|
#endif
|