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jlechner |
/* ldlang.h - linker command language support
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Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef LDLANG_H
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#define LDLANG_H
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#define DEFAULT_MEMORY_REGION "*default*"
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typedef enum
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{
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lang_input_file_is_l_enum,
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lang_input_file_is_symbols_only_enum,
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lang_input_file_is_marker_enum,
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lang_input_file_is_fake_enum,
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lang_input_file_is_search_file_enum,
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lang_input_file_is_file_enum
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} lang_input_file_enum_type;
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struct _fill_type
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{
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size_t size;
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unsigned char data[1];
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};
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typedef struct statement_list
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{
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union lang_statement_union *head;
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union lang_statement_union **tail;
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} lang_statement_list_type;
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typedef struct memory_region_struct
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{
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char *name;
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struct memory_region_struct *next;
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bfd_vma origin;
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bfd_size_type length;
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bfd_vma current;
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union lang_statement_union *last_os;
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flagword flags;
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flagword not_flags;
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bfd_boolean had_full_message;
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} lang_memory_region_type;
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typedef struct lang_statement_header_struct
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{
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union lang_statement_union *next;
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enum statement_enum
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{
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lang_output_section_statement_enum,
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lang_assignment_statement_enum,
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lang_input_statement_enum,
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lang_address_statement_enum,
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lang_wild_statement_enum,
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lang_input_section_enum,
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lang_object_symbols_statement_enum,
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lang_fill_statement_enum,
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lang_data_statement_enum,
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lang_reloc_statement_enum,
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lang_target_statement_enum,
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lang_output_statement_enum,
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lang_padding_statement_enum,
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lang_group_statement_enum,
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lang_insert_statement_enum,
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lang_constructors_statement_enum
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} type;
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} lang_statement_header_type;
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typedef struct
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{
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lang_statement_header_type header;
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union etree_union *exp;
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} lang_assignment_statement_type;
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typedef struct lang_target_statement_struct
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{
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lang_statement_header_type header;
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const char *target;
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} lang_target_statement_type;
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typedef struct lang_output_statement_struct
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{
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lang_statement_header_type header;
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const char *name;
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} lang_output_statement_type;
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/* Section types specified in a linker script. */
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enum section_type
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{
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normal_section,
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overlay_section,
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noload_section,
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noalloc_section
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};
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/* This structure holds a list of program headers describing
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segments in which this section should be placed. */
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typedef struct lang_output_section_phdr_list
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{
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struct lang_output_section_phdr_list *next;
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const char *name;
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bfd_boolean used;
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} lang_output_section_phdr_list;
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typedef struct lang_output_section_statement_struct
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{
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lang_statement_header_type header;
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lang_statement_list_type children;
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struct lang_output_section_statement_struct *next;
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struct lang_output_section_statement_struct *prev;
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const char *name;
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asection *bfd_section;
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lang_memory_region_type *region;
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lang_memory_region_type *lma_region;
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fill_type *fill;
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union etree_union *addr_tree;
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union etree_union *load_base;
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/* If non-null, an expression to evaluate after setting the section's
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size. The expression is evaluated inside REGION (above) with '.'
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set to the end of the section. Used in the last overlay section
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to move '.' past all the overlaid sections. */
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union etree_union *update_dot_tree;
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lang_output_section_phdr_list *phdrs;
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unsigned int block_value;
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int subsection_alignment; /* Alignment of components. */
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int section_alignment; /* Alignment of start of section. */
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int constraint;
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flagword flags;
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enum section_type sectype;
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unsigned int processed_vma : 1;
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unsigned int processed_lma : 1;
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unsigned int all_input_readonly : 1;
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/* If this section should be ignored. */
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unsigned int ignored : 1;
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/* If there is a symbol relative to this section. */
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unsigned int section_relative_symbol : 1;
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} lang_output_section_statement_type;
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typedef struct
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{
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lang_statement_header_type header;
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} lang_common_statement_type;
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typedef struct
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{
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lang_statement_header_type header;
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} lang_object_symbols_statement_type;
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typedef struct
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{
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lang_statement_header_type header;
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fill_type *fill;
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int size;
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asection *output_section;
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} lang_fill_statement_type;
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typedef struct
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{
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lang_statement_header_type header;
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unsigned int type;
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union etree_union *exp;
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bfd_vma value;
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asection *output_section;
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bfd_vma output_offset;
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} lang_data_statement_type;
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/* Generate a reloc in the output file. */
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typedef struct
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{
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lang_statement_header_type header;
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/* Reloc to generate. */
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bfd_reloc_code_real_type reloc;
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/* Reloc howto structure. */
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reloc_howto_type *howto;
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/* Section to generate reloc against.
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Exactly one of section and name must be NULL. */
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asection *section;
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/* Name of symbol to generate reloc against.
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Exactly one of section and name must be NULL. */
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const char *name;
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/* Expression for addend. */
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union etree_union *addend_exp;
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/* Resolved addend. */
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bfd_vma addend_value;
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/* Output section where reloc should be performed. */
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asection *output_section;
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/* Offset within output section. */
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bfd_vma output_offset;
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} lang_reloc_statement_type;
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typedef struct lang_input_statement_struct
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{
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lang_statement_header_type header;
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/* Name of this file. */
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const char *filename;
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/* Name to use for the symbol giving address of text start.
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Usually the same as filename, but for a file spec'd with
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-l this is the -l switch itself rather than the filename. */
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const char *local_sym_name;
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bfd *the_bfd;
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/* Point to the next file - whatever it is, wanders up and down
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archives */
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union lang_statement_union *next;
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/* Point to the next file, but skips archive contents. */
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union lang_statement_union *next_real_file;
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const char *target;
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unsigned int is_archive : 1;
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/* 1 means search a set of directories for this file. */
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unsigned int search_dirs_flag : 1;
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/* 1 means this was found in a search directory marked as sysrooted,
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if search_dirs_flag is false, otherwise, that it should be
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searched in ld_sysroot before any other location, as long as it
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starts with a slash. */
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unsigned int sysrooted : 1;
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/* 1 means this is base file of incremental load.
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Do not load this file's text or data.
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Also default text_start to after this file's bss. */
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unsigned int just_syms_flag : 1;
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/* Whether to search for this entry as a dynamic archive. */
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unsigned int dynamic : 1;
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/* Whether DT_NEEDED tags should be added for dynamic libraries in
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DT_NEEDED tags from this entry. */
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unsigned int add_needed : 1;
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/* Whether this entry should cause a DT_NEEDED tag only when
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satisfying references from regular files, or always. */
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unsigned int as_needed : 1;
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/* Whether to include the entire contents of an archive. */
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unsigned int whole_archive : 1;
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unsigned int loaded : 1;
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unsigned int real : 1;
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} lang_input_statement_type;
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typedef struct
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{
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lang_statement_header_type header;
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asection *section;
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} lang_input_section_type;
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typedef struct lang_wild_statement_struct lang_wild_statement_type;
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typedef void (*callback_t) (lang_wild_statement_type *, struct wildcard_list *,
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asection *, lang_input_statement_type *, void *);
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typedef void (*walk_wild_section_handler_t) (lang_wild_statement_type *,
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lang_input_statement_type *,
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callback_t callback,
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void *data);
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typedef bfd_boolean (*lang_match_sec_type_func) (bfd *, const asection *,
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bfd *, const asection *);
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/* Binary search tree structure to efficiently sort sections by
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name. */
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typedef struct lang_section_bst
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{
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asection *section;
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struct lang_section_bst *left;
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struct lang_section_bst *right;
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} lang_section_bst_type;
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struct lang_wild_statement_struct
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{
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lang_statement_header_type header;
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const char *filename;
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311 |
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bfd_boolean filenames_sorted;
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312 |
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struct wildcard_list *section_list;
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313 |
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bfd_boolean keep_sections;
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314 |
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lang_statement_list_type children;
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315 |
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walk_wild_section_handler_t walk_wild_section_handler;
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struct wildcard_list *handler_data[4];
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lang_section_bst_type *tree;
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};
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320 |
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typedef struct lang_address_statement_struct
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322 |
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{
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323 |
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lang_statement_header_type header;
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324 |
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const char *section_name;
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325 |
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union etree_union *address;
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326 |
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const segment_type *segment;
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327 |
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} lang_address_statement_type;
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329 |
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typedef struct
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330 |
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{
|
331 |
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lang_statement_header_type header;
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332 |
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bfd_vma output_offset;
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333 |
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size_t size;
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334 |
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asection *output_section;
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335 |
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fill_type *fill;
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336 |
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} lang_padding_statement_type;
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337 |
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|
338 |
|
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/* A group statement collects a set of libraries together. The
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libraries are searched multiple times, until no new undefined
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340 |
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symbols are found. The effect is to search a group of libraries as
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though they were a single library. */
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342 |
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|
|
343 |
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typedef struct
|
344 |
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{
|
345 |
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lang_statement_header_type header;
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346 |
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lang_statement_list_type children;
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347 |
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} lang_group_statement_type;
|
348 |
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|
349 |
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typedef struct
|
350 |
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{
|
351 |
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lang_statement_header_type header;
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352 |
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const char *where;
|
353 |
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bfd_boolean is_before;
|
354 |
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} lang_insert_statement_type;
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355 |
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356 |
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typedef union lang_statement_union
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{
|
358 |
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lang_statement_header_type header;
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359 |
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lang_wild_statement_type wild_statement;
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360 |
|
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lang_data_statement_type data_statement;
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361 |
|
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lang_reloc_statement_type reloc_statement;
|
362 |
|
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lang_address_statement_type address_statement;
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363 |
|
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lang_output_section_statement_type output_section_statement;
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364 |
|
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lang_assignment_statement_type assignment_statement;
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365 |
|
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lang_input_statement_type input_statement;
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366 |
|
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lang_target_statement_type target_statement;
|
367 |
|
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lang_output_statement_type output_statement;
|
368 |
|
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lang_input_section_type input_section;
|
369 |
|
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lang_common_statement_type common_statement;
|
370 |
|
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lang_object_symbols_statement_type object_symbols_statement;
|
371 |
|
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lang_fill_statement_type fill_statement;
|
372 |
|
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lang_padding_statement_type padding_statement;
|
373 |
|
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lang_group_statement_type group_statement;
|
374 |
|
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lang_insert_statement_type insert_statement;
|
375 |
|
|
} lang_statement_union_type;
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376 |
|
|
|
377 |
|
|
/* This structure holds information about a program header, from the
|
378 |
|
|
PHDRS command in the linker script. */
|
379 |
|
|
|
380 |
|
|
struct lang_phdr
|
381 |
|
|
{
|
382 |
|
|
struct lang_phdr *next;
|
383 |
|
|
const char *name;
|
384 |
|
|
unsigned long type;
|
385 |
|
|
bfd_boolean filehdr;
|
386 |
|
|
bfd_boolean phdrs;
|
387 |
|
|
etree_type *at;
|
388 |
|
|
etree_type *flags;
|
389 |
|
|
};
|
390 |
|
|
|
391 |
|
|
extern struct lang_phdr *lang_phdr_list;
|
392 |
|
|
|
393 |
|
|
/* This structure is used to hold a list of sections which may not
|
394 |
|
|
cross reference each other. */
|
395 |
|
|
|
396 |
|
|
typedef struct lang_nocrossref
|
397 |
|
|
{
|
398 |
|
|
struct lang_nocrossref *next;
|
399 |
|
|
const char *name;
|
400 |
|
|
} lang_nocrossref_type;
|
401 |
|
|
|
402 |
|
|
/* The list of nocrossref lists. */
|
403 |
|
|
|
404 |
|
|
struct lang_nocrossrefs
|
405 |
|
|
{
|
406 |
|
|
struct lang_nocrossrefs *next;
|
407 |
|
|
lang_nocrossref_type *list;
|
408 |
|
|
};
|
409 |
|
|
|
410 |
|
|
extern struct lang_nocrossrefs *nocrossref_list;
|
411 |
|
|
|
412 |
|
|
/* This structure is used to hold a list of input section names which
|
413 |
|
|
will not match an output section in the linker script. */
|
414 |
|
|
|
415 |
|
|
struct unique_sections
|
416 |
|
|
{
|
417 |
|
|
struct unique_sections *next;
|
418 |
|
|
const char *name;
|
419 |
|
|
};
|
420 |
|
|
|
421 |
|
|
/* This structure records symbols for which we need to keep track of
|
422 |
|
|
definedness for use in the DEFINED () test. */
|
423 |
|
|
|
424 |
|
|
struct lang_definedness_hash_entry
|
425 |
|
|
{
|
426 |
|
|
struct bfd_hash_entry root;
|
427 |
|
|
int iteration;
|
428 |
|
|
};
|
429 |
|
|
|
430 |
|
|
/* Used by place_orphan to keep track of orphan sections and statements. */
|
431 |
|
|
|
432 |
|
|
struct orphan_save {
|
433 |
|
|
const char *name;
|
434 |
|
|
flagword flags;
|
435 |
|
|
lang_output_section_statement_type *os;
|
436 |
|
|
asection **section;
|
437 |
|
|
lang_statement_union_type **stmt;
|
438 |
|
|
lang_output_section_statement_type **os_tail;
|
439 |
|
|
};
|
440 |
|
|
|
441 |
|
|
extern lang_output_section_statement_type *abs_output_section;
|
442 |
|
|
extern lang_statement_list_type lang_output_section_statement;
|
443 |
|
|
extern bfd_boolean lang_has_input_file;
|
444 |
|
|
extern etree_type *base;
|
445 |
|
|
extern lang_statement_list_type *stat_ptr;
|
446 |
|
|
extern bfd_boolean delete_output_file_on_failure;
|
447 |
|
|
|
448 |
|
|
extern struct bfd_sym_chain entry_symbol;
|
449 |
|
|
extern const char *entry_section;
|
450 |
|
|
extern bfd_boolean entry_from_cmdline;
|
451 |
|
|
extern lang_statement_list_type file_chain;
|
452 |
|
|
extern lang_statement_list_type input_file_chain;
|
453 |
|
|
|
454 |
|
|
extern int lang_statement_iteration;
|
455 |
|
|
|
456 |
|
|
extern void lang_init
|
457 |
|
|
(void);
|
458 |
|
|
extern void lang_finish
|
459 |
|
|
(void);
|
460 |
|
|
extern lang_memory_region_type *lang_memory_region_lookup
|
461 |
|
|
(const char *const, bfd_boolean);
|
462 |
|
|
extern lang_memory_region_type *lang_memory_region_default
|
463 |
|
|
(asection *);
|
464 |
|
|
extern void lang_map
|
465 |
|
|
(void);
|
466 |
|
|
extern void lang_set_flags
|
467 |
|
|
(lang_memory_region_type *, const char *, int);
|
468 |
|
|
extern void lang_add_output
|
469 |
|
|
(const char *, int from_script);
|
470 |
|
|
extern lang_output_section_statement_type *lang_enter_output_section_statement
|
471 |
|
|
(const char *output_section_statement_name,
|
472 |
|
|
etree_type *address_exp,
|
473 |
|
|
enum section_type sectype,
|
474 |
|
|
etree_type *align,
|
475 |
|
|
etree_type *subalign,
|
476 |
|
|
etree_type *, int);
|
477 |
|
|
extern void lang_final
|
478 |
|
|
(void);
|
479 |
|
|
extern void lang_process
|
480 |
|
|
(void);
|
481 |
|
|
extern void lang_section_start
|
482 |
|
|
(const char *, union etree_union *, const segment_type *);
|
483 |
|
|
extern void lang_add_entry
|
484 |
|
|
(const char *, bfd_boolean);
|
485 |
|
|
extern void lang_default_entry
|
486 |
|
|
(const char *);
|
487 |
|
|
extern void lang_add_target
|
488 |
|
|
(const char *);
|
489 |
|
|
extern void lang_add_wild
|
490 |
|
|
(struct wildcard_spec *, struct wildcard_list *, bfd_boolean);
|
491 |
|
|
extern void lang_add_map
|
492 |
|
|
(const char *);
|
493 |
|
|
extern void lang_add_fill
|
494 |
|
|
(fill_type *);
|
495 |
|
|
extern lang_assignment_statement_type *lang_add_assignment
|
496 |
|
|
(union etree_union *);
|
497 |
|
|
extern void lang_add_attribute
|
498 |
|
|
(enum statement_enum);
|
499 |
|
|
extern void lang_startup
|
500 |
|
|
(const char *);
|
501 |
|
|
extern void lang_float
|
502 |
|
|
(bfd_boolean);
|
503 |
|
|
extern void lang_leave_output_section_statement
|
504 |
|
|
(fill_type *, const char *, lang_output_section_phdr_list *,
|
505 |
|
|
const char *);
|
506 |
|
|
extern void lang_abs_symbol_at_end_of
|
507 |
|
|
(const char *, const char *);
|
508 |
|
|
extern void lang_abs_symbol_at_beginning_of
|
509 |
|
|
(const char *, const char *);
|
510 |
|
|
extern void lang_statement_append
|
511 |
|
|
(lang_statement_list_type *, lang_statement_union_type *,
|
512 |
|
|
lang_statement_union_type **);
|
513 |
|
|
extern void lang_for_each_input_file
|
514 |
|
|
(void (*dothis) (lang_input_statement_type *));
|
515 |
|
|
extern void lang_for_each_file
|
516 |
|
|
(void (*dothis) (lang_input_statement_type *));
|
517 |
|
|
extern void lang_reset_memory_regions
|
518 |
|
|
(void);
|
519 |
|
|
extern void lang_do_assignments
|
520 |
|
|
(void);
|
521 |
|
|
|
522 |
|
|
#define LANG_FOR_EACH_INPUT_STATEMENT(statement) \
|
523 |
|
|
lang_input_statement_type *statement; \
|
524 |
|
|
for (statement = (lang_input_statement_type *) file_chain.head; \
|
525 |
|
|
statement != (lang_input_statement_type *) NULL; \
|
526 |
|
|
statement = (lang_input_statement_type *) statement->next) \
|
527 |
|
|
|
528 |
|
|
#define lang_output_section_find(NAME) \
|
529 |
|
|
lang_output_section_statement_lookup (NAME, 0, FALSE)
|
530 |
|
|
|
531 |
|
|
extern void lang_process
|
532 |
|
|
(void);
|
533 |
|
|
extern void ldlang_add_file
|
534 |
|
|
(lang_input_statement_type *);
|
535 |
|
|
extern lang_output_section_statement_type *lang_output_section_find_by_flags
|
536 |
|
|
(const asection *, lang_output_section_statement_type **,
|
537 |
|
|
lang_match_sec_type_func);
|
538 |
|
|
extern lang_output_section_statement_type *lang_insert_orphan
|
539 |
|
|
(asection *, const char *, lang_output_section_statement_type *,
|
540 |
|
|
struct orphan_save *, etree_type *, lang_statement_list_type *);
|
541 |
|
|
extern lang_input_statement_type *lang_add_input_file
|
542 |
|
|
(const char *, lang_input_file_enum_type, const char *);
|
543 |
|
|
extern void lang_add_keepsyms_file
|
544 |
|
|
(const char *);
|
545 |
|
|
extern lang_output_section_statement_type *lang_output_section_statement_lookup
|
546 |
|
|
(const char *const, int, bfd_boolean);
|
547 |
|
|
extern void ldlang_add_undef
|
548 |
|
|
(const char *const);
|
549 |
|
|
extern void lang_add_output_format
|
550 |
|
|
(const char *, const char *, const char *, int);
|
551 |
|
|
extern void lang_list_init
|
552 |
|
|
(lang_statement_list_type *);
|
553 |
|
|
extern void lang_add_data
|
554 |
|
|
(int type, union etree_union *);
|
555 |
|
|
extern void lang_add_reloc
|
556 |
|
|
(bfd_reloc_code_real_type, reloc_howto_type *, asection *, const char *,
|
557 |
|
|
union etree_union *);
|
558 |
|
|
extern void lang_for_each_statement
|
559 |
|
|
(void (*) (lang_statement_union_type *));
|
560 |
|
|
extern void *stat_alloc
|
561 |
|
|
(size_t);
|
562 |
|
|
extern void strip_excluded_output_sections
|
563 |
|
|
(void);
|
564 |
|
|
extern void dprint_statement
|
565 |
|
|
(lang_statement_union_type *, int);
|
566 |
|
|
extern void lang_size_sections
|
567 |
|
|
(bfd_boolean *, bfd_boolean);
|
568 |
|
|
extern void one_lang_size_sections_pass
|
569 |
|
|
(bfd_boolean *, bfd_boolean);
|
570 |
|
|
extern void lang_add_insert
|
571 |
|
|
(const char *, int);
|
572 |
|
|
extern void lang_enter_group
|
573 |
|
|
(void);
|
574 |
|
|
extern void lang_leave_group
|
575 |
|
|
(void);
|
576 |
|
|
extern void lang_add_section
|
577 |
|
|
(lang_statement_list_type *, asection *,
|
578 |
|
|
lang_output_section_statement_type *);
|
579 |
|
|
extern void lang_new_phdr
|
580 |
|
|
(const char *, etree_type *, bfd_boolean, bfd_boolean, etree_type *,
|
581 |
|
|
etree_type *);
|
582 |
|
|
extern void lang_add_nocrossref
|
583 |
|
|
(lang_nocrossref_type *);
|
584 |
|
|
extern void lang_enter_overlay
|
585 |
|
|
(etree_type *, etree_type *);
|
586 |
|
|
extern void lang_enter_overlay_section
|
587 |
|
|
(const char *);
|
588 |
|
|
extern void lang_leave_overlay_section
|
589 |
|
|
(fill_type *, lang_output_section_phdr_list *);
|
590 |
|
|
extern void lang_leave_overlay
|
591 |
|
|
(etree_type *, int, fill_type *, const char *,
|
592 |
|
|
lang_output_section_phdr_list *, const char *);
|
593 |
|
|
|
594 |
|
|
extern struct bfd_elf_version_tree *lang_elf_version_info;
|
595 |
|
|
|
596 |
|
|
extern struct bfd_elf_version_expr *lang_new_vers_pattern
|
597 |
|
|
(struct bfd_elf_version_expr *, const char *, const char *, bfd_boolean);
|
598 |
|
|
extern struct bfd_elf_version_tree *lang_new_vers_node
|
599 |
|
|
(struct bfd_elf_version_expr *, struct bfd_elf_version_expr *);
|
600 |
|
|
extern struct bfd_elf_version_deps *lang_add_vers_depend
|
601 |
|
|
(struct bfd_elf_version_deps *, const char *);
|
602 |
|
|
extern void lang_register_vers_node
|
603 |
|
|
(const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
|
604 |
|
|
extern void lang_append_dynamic_list (struct bfd_elf_version_expr *);
|
605 |
|
|
extern void lang_append_dynamic_list_cpp_typeinfo (void);
|
606 |
|
|
extern void lang_append_dynamic_list_cpp_new (void);
|
607 |
|
|
bfd_boolean unique_section_p
|
608 |
|
|
(const asection *);
|
609 |
|
|
extern void lang_add_unique
|
610 |
|
|
(const char *);
|
611 |
|
|
extern const char *lang_get_output_target
|
612 |
|
|
(void);
|
613 |
|
|
extern void lang_track_definedness (const char *);
|
614 |
|
|
extern int lang_symbol_definition_iteration (const char *);
|
615 |
|
|
extern void lang_update_definedness
|
616 |
|
|
(const char *, struct bfd_link_hash_entry *);
|
617 |
|
|
|
618 |
|
|
extern void add_excluded_libs (const char *);
|
619 |
|
|
extern bfd_boolean load_symbols
|
620 |
|
|
(lang_input_statement_type *, lang_statement_list_type *);
|
621 |
|
|
|
622 |
|
|
extern bfd_boolean
|
623 |
|
|
ldlang_override_segment_assignment
|
624 |
|
|
(struct bfd_link_info *, bfd *, asection *, asection *, bfd_boolean);
|
625 |
|
|
|
626 |
|
|
#endif
|