binutils-gdb/ld/ldlang.h

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/* ldlang.h - linker command language support
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Copyright 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001
Free Software Foundation, Inc.
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This file is part of GLD, the Gnu Linker.
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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 1, or (at your option)
any later version.
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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.
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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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef LDLANG_H
#define LDLANG_H
typedef enum {
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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;
typedef unsigned int fill_type;
typedef struct statement_list {
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union lang_statement_union *head;
union lang_statement_union **tail;
} lang_statement_list_type;
typedef struct memory_region_struct {
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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;
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;
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} lang_statement_header_type;
typedef struct {
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lang_statement_header_type header;
union etree_union *exp;
} lang_assignment_statement_type;
typedef struct lang_target_statement_struct {
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lang_statement_header_type header;
const char *target;
} lang_target_statement_type;
typedef struct lang_output_statement_struct {
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lang_statement_header_type header;
const char *name;
} lang_output_statement_type;
/* Section types specified in a linker script. */
enum section_type {
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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. */
struct lang_output_section_phdr_list {
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struct lang_output_section_phdr_list *next;
const char *name;
boolean used;
};
typedef struct lang_output_section_statement_struct {
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lang_statement_header_type header;
union etree_union *addr_tree;
lang_statement_list_type children;
const char *memspec;
union lang_statement_union *next;
const char *name;
boolean processed;
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asection *bfd_section;
flagword flags; /* Or together of all input sections */
enum section_type sectype;
struct memory_region_struct *region;
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struct memory_region_struct *lma_region;
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size_t block_value;
fill_type fill;
int subsection_alignment; /* alignment of components */
int section_alignment; /* alignment of start of section */
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union etree_union *load_base;
struct lang_output_section_phdr_list *phdrs;
} lang_output_section_statement_type;
typedef struct {
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lang_statement_header_type header;
} lang_common_statement_type;
typedef struct {
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lang_statement_header_type header;
} lang_object_symbols_statement_type;
typedef struct {
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lang_statement_header_type header;
fill_type fill;
int size;
asection *output_section;
} lang_fill_statement_type;
typedef struct {
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lang_statement_header_type header;
unsigned int type;
union etree_union *exp;
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bfd_vma value;
asection *output_section;
bfd_vma output_vma;
} lang_data_statement_type;
/* Generate a reloc in the output file. */
typedef struct {
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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 {
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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;
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bfd *the_bfd;
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boolean closed;
file_ptr passive_position;
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/* Symbol table of the file. */
asymbol **asymbols;
unsigned int symbol_count;
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/* Point to the next file - whatever it is, wanders up and down
archives */
union lang_statement_union *next;
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/* Point to the next file, but skips archive contents */
union lang_statement_union *next_real_file;
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boolean is_archive;
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/* 1 means search a set of directories for this file. */
boolean search_dirs_flag;
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/* 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. */
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boolean just_syms_flag;
/* Whether to search for this entry as a dynamic archive. */
boolean dynamic;
/* Whether to include the entire contents of an archive. */
boolean whole_archive;
boolean loaded;
#if 0
unsigned int globals_in_this_file;
#endif
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const char *target;
boolean real;
} lang_input_statement_type;
typedef struct {
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lang_statement_header_type header;
asection *section;
lang_input_statement_type *ifile;
} lang_input_section_type;
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typedef struct {
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lang_statement_header_type header;
asection *section;
union lang_statement_union *file;
} lang_afile_asection_pair_statement_type;
typedef struct lang_wild_statement_struct {
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lang_statement_header_type header;
const char *section_name;
boolean sections_sorted;
const char *filename;
boolean filenames_sorted;
boolean keep_sections;
struct name_list *exclude_filename_list;
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lang_statement_list_type children;
} lang_wild_statement_type;
typedef struct lang_address_statement_struct {
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lang_statement_header_type header;
const char *section_name;
union etree_union *address;
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} lang_address_statement_type;
typedef struct {
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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 {
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lang_statement_header_type header;
lang_statement_list_type children;
} lang_group_statement_type;
typedef union lang_statement_union {
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lang_statement_header_type header;
union lang_statement_union *next;
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 {
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struct lang_phdr *next;
const char *name;
unsigned long type;
boolean filehdr;
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. */
struct lang_nocrossref {
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struct lang_nocrossref *next;
const char *name;
};
/* The list of nocrossref lists. */
struct lang_nocrossrefs {
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struct lang_nocrossrefs *next;
struct lang_nocrossref *list;
};
extern struct lang_nocrossrefs *nocrossref_list;
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/* 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;
};
extern struct unique_sections *unique_section_list;
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extern lang_output_section_statement_type *abs_output_section;
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extern lang_statement_list_type lang_output_section_statement;
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extern boolean lang_has_input_file;
extern etree_type *base;
extern lang_statement_list_type *stat_ptr;
extern boolean delete_output_file_on_failure;
extern const char *entry_symbol;
extern boolean entry_from_cmdline;
extern lang_statement_list_type file_chain;
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extern void lang_init PARAMS ((void));
extern struct memory_region_struct *lang_memory_region_lookup
PARAMS ((const char *const));
extern struct memory_region_struct *lang_memory_region_default
PARAMS ((asection *));
extern void lang_map PARAMS ((void));
extern void lang_set_flags PARAMS ((lang_memory_region_type *, const char *,
int));
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extern void lang_add_output PARAMS ((const char *, int from_script));
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extern lang_output_section_statement_type *lang_enter_output_section_statement
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PARAMS ((const char *output_section_statement_name,
etree_type * address_exp,
enum section_type sectype,
bfd_vma block_value,
etree_type *align,
etree_type *subalign,
etree_type *));
extern void lang_final PARAMS ((void));
extern void lang_process PARAMS ((void));
extern void lang_section_start PARAMS ((const char *, union etree_union *));
extern void lang_add_entry PARAMS ((const char *, boolean));
extern void lang_add_target PARAMS ((const char *));
extern void lang_add_wild
PARAMS ((const char *, boolean, const char *, boolean, boolean, name_list *));
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extern void lang_add_map PARAMS ((const char *));
extern void lang_add_fill PARAMS ((int));
extern lang_assignment_statement_type * lang_add_assignment PARAMS ((union etree_union *));
extern void lang_add_attribute PARAMS ((enum statement_enum));
extern void lang_startup PARAMS ((const char *));
extern void lang_float PARAMS ((enum bfd_boolean));
extern void lang_leave_output_section_statement
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PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
const char *));
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extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
const char *));
extern void lang_statement_append PARAMS ((struct statement_list *,
union lang_statement_union *,
union lang_statement_union **));
extern void lang_for_each_input_file
PARAMS ((void (*dothis) (lang_input_statement_type *)));
extern void lang_for_each_file
PARAMS ((void (*dothis) (lang_input_statement_type *)));
extern bfd_vma lang_do_assignments
PARAMS ((lang_statement_union_type * s,
lang_output_section_statement_type *output_section_statement,
fill_type fill,
bfd_vma dot));
#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)\
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extern void lang_process PARAMS ((void));
extern void ldlang_add_file PARAMS ((lang_input_statement_type *));
extern lang_output_section_statement_type *lang_output_section_find
PARAMS ((const char * const));
extern lang_input_statement_type *lang_add_input_file
PARAMS ((const char *name, lang_input_file_enum_type file_type,
const char *target));
extern void lang_add_keepsyms_file PARAMS ((const char *filename));
extern lang_output_section_statement_type *
lang_output_section_statement_lookup PARAMS ((const char * const name));
extern void ldlang_add_undef PARAMS ((const char *const name));
extern void lang_add_output_format PARAMS ((const char *, const char *,
const char *, int from_script));
extern void lang_list_init PARAMS ((lang_statement_list_type*));
extern void lang_add_data PARAMS ((int type, union etree_union *));
extern void lang_add_reloc
PARAMS ((bfd_reloc_code_real_type reloc, reloc_howto_type *howto,
asection *section, const char *name, union etree_union *addend));
extern void lang_for_each_statement
PARAMS ((void (*func) (lang_statement_union_type *)));
extern PTR stat_alloc PARAMS ((size_t size));
extern void dprint_statement PARAMS ((lang_statement_union_type *, int));
extern bfd_vma lang_size_sections
PARAMS ((lang_statement_union_type *s,
lang_output_section_statement_type *output_section_statement,
lang_statement_union_type **prev, fill_type fill,
bfd_vma dot, boolean relax));
extern void lang_enter_group PARAMS ((void));
extern void lang_leave_group PARAMS ((void));
extern void wild_doit
PARAMS ((lang_statement_list_type *ptr, asection *section,
lang_output_section_statement_type *output,
lang_input_statement_type *file));
extern void lang_new_phdr
PARAMS ((const char *, etree_type *, boolean, boolean, etree_type *,
etree_type *));
extern void lang_add_nocrossref PARAMS ((struct lang_nocrossref *));
extern void lang_enter_overlay PARAMS ((etree_type *, etree_type *, int));
extern void lang_enter_overlay_section PARAMS ((const char *));
extern void lang_leave_overlay_section
PARAMS ((bfd_vma, struct lang_output_section_phdr_list *));
extern void lang_leave_overlay
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PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
const char *));
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extern struct bfd_elf_version_tree *lang_elf_version_info;
extern struct bfd_elf_version_expr *lang_new_vers_regex
PARAMS ((struct bfd_elf_version_expr *, const char *, const char *));
extern struct bfd_elf_version_tree *lang_new_vers_node
PARAMS ((struct bfd_elf_version_expr *, struct bfd_elf_version_expr *));
extern struct bfd_elf_version_deps *lang_add_vers_depend
PARAMS ((struct bfd_elf_version_deps *, const char *));
extern void lang_register_vers_node
PARAMS ((const char *, struct bfd_elf_version_tree *,
struct bfd_elf_version_deps *));
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boolean unique_section_p PARAMS ((const char *));
extern void lang_add_unique PARAMS ((const char *));
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#endif