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Diffstat (limited to 'x/binutils/ld/ldlang.h')
| -rw-r--r-- | x/binutils/ld/ldlang.h | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/x/binutils/ld/ldlang.h b/x/binutils/ld/ldlang.h new file mode 100644 index 0000000..649fea1 --- /dev/null +++ b/x/binutils/ld/ldlang.h @@ -0,0 +1,569 @@ +/* ldlang.h - linker command language support + Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, + 2001, 2002, 2003, 2004 + 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, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, 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; + union lang_statement_union *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. */ + + 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 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; + +#if 0 + unsigned int globals_in_this_file; +#endif + 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_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; +} lang_wild_statement_type; + +typedef struct lang_address_statement_struct +{ + lang_statement_header_type header; + const char *section_name; + union etree_union *address; +} 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; +}; + +extern struct unique_sections *unique_section_list; + +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 *); +extern void lang_final + (void); +extern void lang_process + (void); +extern void lang_section_start + (const char *, union etree_union *); +extern void lang_add_entry + (const char *, bfd_boolean); +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 + (lang_statement_union_type *, lang_output_section_statement_type *, + fill_type *, bfd_vma); + +#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_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 dprint_statement + (lang_statement_union_type *, int); +extern bfd_vma lang_size_sections + (lang_statement_union_type *, lang_output_section_statement_type *, + lang_statement_union_type **, fill_type *, bfd_vma, 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 char *); +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 *); + +#endif |
