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Diffstat (limited to 'ld/ldlang.h')
| -rw-r--r-- | ld/ldlang.h | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/ld/ldlang.h b/ld/ldlang.h new file mode 100644 index 0000000..7bd7972 --- /dev/null +++ b/ld/ldlang.h @@ -0,0 +1,490 @@ +/* ldlang.h - linker command language support + Copyright 1991, 92, 93, 94, 95, 96, 97, 1998 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 1, 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 + +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; + +typedef unsigned int fill_type; +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; + 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. */ + +struct lang_output_section_phdr_list +{ + struct lang_output_section_phdr_list *next; + const char *name; + boolean used; +}; + +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; + + boolean processed; + + asection *bfd_section; + flagword flags; /* Or together of all input sections */ + enum section_type sectype; + struct memory_region_struct *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; + + struct 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; + + 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; + + boolean is_archive; + + /* 1 means search a set of directories for this file. */ + boolean search_dirs_flag; + + /* 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. */ + + 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; + + /* unsigned int globals_in_this_file;*/ + const char *target; + 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 *section_name; + boolean sections_sorted; + const char *filename; + boolean filenames_sorted; + boolean keep_sections; + const char *exclude_filename; + 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; + 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 +{ + 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 +{ + struct lang_nocrossref *next; + const char *name; +}; + +/* The list of nocrossref lists. */ + +struct lang_nocrossrefs +{ + struct lang_nocrossrefs *next; + struct lang_nocrossref *list; +}; + +extern struct lang_nocrossrefs *nocrossref_list; + +extern lang_output_section_statement_type *abs_output_section; +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 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 *)); +extern void lang_add_output PARAMS ((const char *, int from_script)); +extern void lang_enter_output_section_statement + 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, const char *)); +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 + PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); +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) \ + extern lang_statement_list_type file_chain; \ + 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 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 + PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *)); + +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 *)); + +#endif |