X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=ld%2Fldlang.h;h=8dd4bfda1909675ca7d0eae8022fa821bdae7033;hb=40c75bc8b07abc5d5774ea1c439b69c96e7fd485;hp=1613541288a47281d0c9a5611c75d82f08795050;hpb=7b986e992e1a3a388ee0ff0749749f063cc971a6;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/ldlang.h b/ld/ldlang.h index 1613541288..8dd4bfda19 100644 --- a/ld/ldlang.h +++ b/ld/ldlang.h @@ -1,24 +1,22 @@ /* 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. + Copyright (C) 1991-2020 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 @@ -43,46 +41,56 @@ struct _fill_type 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 @@ -108,11 +116,10 @@ typedef struct lang_output_statement_struct enum section_type { normal_section, - dsect_section, - copy_section, + first_overlay_section, + overlay_section, noload_section, - info_section, - overlay_section + noalloc_section }; /* This structure holds a list of program headers describing @@ -138,6 +145,8 @@ typedef struct lang_output_section_statement_struct 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 '.' @@ -148,26 +157,22 @@ typedef struct lang_output_section_statement_struct 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; } 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; @@ -219,66 +224,91 @@ typedef struct 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; - - bfd *the_bfd; + /* 1 means this file was specified in a -l option. */ + unsigned int maybe_archive : 1; - 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; + + unsigned int real : 1; - bfd_boolean loaded; + /* 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; + +#ifdef ENABLE_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 /* ENABLE_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; + + 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 @@ -287,23 +317,50 @@ 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 *, callback_t callback, void *data); +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; @@ -312,9 +369,12 @@ struct lang_wild_statement_struct 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 @@ -329,7 +389,7 @@ typedef 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; @@ -345,25 +405,30 @@ typedef struct 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 @@ -395,10 +460,9 @@ struct lang_nocrossrefs { 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. */ @@ -408,18 +472,10 @@ struct unique_sections 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; @@ -428,10 +484,21 @@ struct orphan_save { 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; @@ -439,17 +506,21 @@ 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 lang_statement_list_type input_file_chain; 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 @@ -457,14 +528,12 @@ 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 @@ -492,13 +561,6 @@ extern void lang_float 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 @@ -506,38 +568,51 @@ 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, FALSE) 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); + (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, bfd_boolean); +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 @@ -545,28 +620,36 @@ 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 @@ -577,8 +660,6 @@ 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 *, bfd_boolean); extern struct bfd_elf_version_tree *lang_new_vers_node @@ -587,17 +668,34 @@ 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_append_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_apply_strsym + (struct elf_sym_strtab *, bfd_size_type, struct elf_strtab_hash *); +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 *); #endif