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v2.39
gold/script-c.h
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Ziyao
Import source from binutils
18 сен 2022, 18:55
18 сен 2022, 18:55
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/* script-c.h -- C interface for linker scripts in gold. */ /* Copyright (C) 2006-2022 Free Software Foundation, Inc. Written by Ian Lance Taylor <iant@google.com>. This file is part of gold. 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 3 of the License, or (at your option) any later version. 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* This file exists so that both the bison parser and script.cc can include it, so that they can communicate back and forth. */ #ifndef GOLD_SCRIPT_C_H #define GOLD_SCRIPT_C_H #ifdef __cplusplus #include <vector> #include <string> #endif #ifdef __cplusplus // For the C++ code we declare the various supporting structures in // the gold namespace. For the C code we declare it at the top level. // The namespace level should not affect the layout of the structure. namespace gold { #endif /* A string value for the bison parser. */ struct Parser_string { const char* value; size_t length; }; /* The expression functions deal with pointers to Expression objects. Since the bison parser generates C code, this is a hack to keep the C++ code type safe. This hacks assumes that all pointers look alike. */ #ifdef __cplusplus class Expression; typedef Expression* Expression_ptr; #else typedef void* Expression_ptr; #endif /* Script_section type. */ enum Script_section_type { /* No section type. */ SCRIPT_SECTION_TYPE_NONE, SCRIPT_SECTION_TYPE_NOLOAD, SCRIPT_SECTION_TYPE_DSECT, SCRIPT_SECTION_TYPE_COPY, SCRIPT_SECTION_TYPE_INFO, SCRIPT_SECTION_TYPE_OVERLAY }; /* A constraint for whether to use a particular output section definition. */ enum Section_constraint { /* No constraint. */ CONSTRAINT_NONE, /* Only if all input sections are read-only. */ CONSTRAINT_ONLY_IF_RO, /* Only if at least input section is writable. */ CONSTRAINT_ONLY_IF_RW, /* Special constraint. */ CONSTRAINT_SPECIAL }; /* The information we store for an output section header in the bison parser. */ struct Parser_output_section_header { /* The address. This may be NULL. */ Expression_ptr address; /* Section type. May be NULL string. */ enum Script_section_type section_type; /* The load address, from the AT specifier. This may be NULL. */ Expression_ptr load_address; /* The alignment, from the ALIGN specifier. This may be NULL. */ Expression_ptr align; /* The input section alignment, from the SUBALIGN specifier. This may be NULL. */ Expression_ptr subalign; /* A constraint on this output section. */ enum Section_constraint constraint; }; /* We keep vectors of strings. In order to manage this in both C and C++, we use a pointer to a vector. This assumes that all pointers look the same. */ #ifdef __cplusplus typedef std::vector<std::string> String_list; typedef String_list* String_list_ptr; #else typedef void* String_list_ptr; #endif /* The information we store for an output section trailer in the bison parser. */ struct Parser_output_section_trailer { /* The fill value. This may be NULL. */ Expression_ptr fill; /* The program segments this section should go into. This may be NULL. */ String_list_ptr phdrs; }; /* The different sorts we can find in a linker script. */ enum Sort_wildcard { SORT_WILDCARD_NONE, SORT_WILDCARD_BY_NAME, SORT_WILDCARD_BY_ALIGNMENT, SORT_WILDCARD_BY_NAME_BY_ALIGNMENT, SORT_WILDCARD_BY_ALIGNMENT_BY_NAME, SORT_WILDCARD_BY_INIT_PRIORITY }; /* The information we build for a single wildcard specification. */ struct Wildcard_section { /* The wildcard spec itself. */ struct Parser_string name; /* How the entries should be sorted. */ enum Sort_wildcard sort; }; /* A vector of Wildcard_section entries. */ #ifdef __cplusplus typedef std::vector<Wildcard_section> String_sort_list; typedef String_sort_list* String_sort_list_ptr; #else typedef void* String_sort_list_ptr; #endif /* A list of wildcard specifications, which may include EXCLUDE_FILE clauses. */ struct Wildcard_sections { /* Wildcard specs. */ String_sort_list_ptr sections; /* Exclusions. */ String_list_ptr exclude; }; /* A complete input section specification. */ struct Input_section_spec { /* The file name. */ struct Wildcard_section file; /* The list of sections. */ struct Wildcard_sections input_sections; }; /* Information for a program header. */ struct Phdr_info { /* A boolean value: whether to include the file header. */ int includes_filehdr; /* A boolean value: whether to include the program headers. */ int includes_phdrs; /* A boolean value: whether the flags field is valid. */ int is_flags_valid; /* The value to use for the flags. */ unsigned int flags; /* The load address. */ Expression_ptr load_address; }; struct Version_dependency_list; struct Version_expression_list; struct Version_tree; #ifdef __cplusplus extern "C" { #endif /* The bison parser definitions. */ #include "yyscript.h" /* The bison parser function. */ extern int yyparse(void* closure); /* Called by the bison parser skeleton to return the next token. */ extern int yylex(YYSTYPE*, void* closure); /* Called by the bison parser skeleton to report an error. */ extern void yyerror(void* closure, const char*); /* Called by the bison parser to add an external symbol (a symbol in an EXTERN declaration) to the link. */ extern void script_add_extern(void* closure, const char*, size_t); /* Called by the bison parser to add a file to the link. */ extern void script_add_file(void* closure, const char*, size_t); /* Called by the bison parser to add a library to the link. */ extern void script_add_library(void* closure, const char*, size_t); /* Called by the bison parser to start and stop a group. */ extern void script_start_group(void* closure); extern void script_end_group(void* closure); /* Called by the bison parser to start and end an AS_NEEDED list. */ extern void script_start_as_needed(void* closure); extern void script_end_as_needed(void* closure); /* Called by the bison parser to set the entry symbol. */ extern void script_set_entry(void* closure, const char*, size_t); /* Called by the bison parser to set whether to define common symbols. */ extern void script_set_common_allocation(void* closure, int); /* Called by the bison parser to parse an OPTION. */ extern void script_parse_option(void* closure, const char*, size_t); /* Called by the bison parser to handle OUTPUT_FORMAT. This return 0 if the parse should be aborted. */ extern int script_check_output_format(void* closure, const char*, size_t, const char*, size_t, const char*, size_t); /* Called by the bison parser to handle TARGET. */ extern void script_set_target(void* closure, const char*, size_t); /* Called by the bison parser to handle SEARCH_DIR. */ extern void script_add_search_dir(void* closure, const char*, size_t); /* Called by the bison parser to push the lexer into expression mode. */ extern void script_push_lex_into_expression_mode(void* closure); /* Called by the bison parser to push the lexer into version mode. */ extern void script_push_lex_into_version_mode(void* closure); /* Called by the bison parser to pop the lexer mode. */ extern void script_pop_lex_mode(void* closure); /* Called by the bison parser to get the value of a symbol. This is called for a reference to a symbol, but is not called for something like "sym += 10". Uses of the special symbol "." can just call script_exp_string. */ extern Expression_ptr script_symbol(void* closure, const char*, size_t); /* Called by the bison parser to set a symbol to a value. PROVIDE is non-zero if the symbol should be provided--only defined if there is an undefined reference. HIDDEN is non-zero if the symbol should be hidden. */ extern void script_set_symbol(void* closure, const char*, size_t, Expression_ptr, int provide, int hidden); /* Called by the bison parser to add an assertion. */ extern void script_add_assertion(void* closure, Expression_ptr, const char* message, size_t messagelen); /* Called by the bison parser to start a SECTIONS clause. */ extern void script_start_sections(void* closure); /* Called by the bison parser to finish a SECTIONS clause. */ extern void script_finish_sections(void* closure); /* Called by the bison parser to start handling input section specifications for an output section. */ extern void script_start_output_section(void* closure, const char* name, size_t namelen, const struct Parser_output_section_header*); /* Called by the bison parser when done handling input section specifications for an output section. */ extern void script_finish_output_section(void* closure, const struct Parser_output_section_trailer*); /* Called by the bison parser to handle a data statement (LONG, BYTE, etc.) in an output section. */ extern void script_add_data(void* closure, int data_token, Expression_ptr val); /* Called by the bison parser to set the fill value in an output section. */ extern void script_add_fill(void* closure, Expression_ptr val); /* Called by the bison parser to add an input section specification to an output section. The KEEP parameter is non-zero if this is within a KEEP clause, meaning that the garbage collector should not discard it. */ extern void script_add_input_section(void* closure, const struct Input_section_spec*, int keep); /* Create a new list of string and sort entries. */ extern String_sort_list_ptr script_new_string_sort_list(const struct Wildcard_section*); /* Add an entry to a list of string and sort entries. */ extern String_sort_list_ptr script_string_sort_list_add(String_sort_list_ptr, const struct Wildcard_section*); /* Create a new list of strings. */ extern String_list_ptr script_new_string_list(const char*, size_t); /* Add an element to a list of strings. */ extern String_list_ptr script_string_list_push_back(String_list_ptr, const char*, size_t); /* Concatenate two string lists. */ extern String_list_ptr script_string_list_append(String_list_ptr, String_list_ptr); /* Define a new program header. */ extern void script_add_phdr(void* closure, const char* name, size_t namelen, unsigned int type, const struct Phdr_info*); /* Convert a program header string to a type. */ extern unsigned int script_phdr_string_to_type(void* closure, const char*, size_t); /* Handle DATA_SEGMENT_ALIGN and DATA_SEGMENT_RELRO_END. */ extern void script_data_segment_align(void* closure); extern void script_data_segment_relro_end(void* closure); /* Record the fact that a SEGMENT_START expression is seen. */ extern void script_saw_segment_start_expression(void* closure); /* Called by the bison parser for MEMORY regions. */ extern void script_add_memory(void*, const char*, size_t, unsigned int, Expression_ptr, Expression_ptr); extern unsigned int script_parse_memory_attr(void*, const char*, size_t, int); extern void script_set_section_region(void*, const char*, size_t, int); extern void script_include_directive(int, void *, const char*, size_t); /* Called by the bison parser for expressions. */ extern Expression_ptr script_exp_unary_minus(Expression_ptr); extern Expression_ptr script_exp_unary_logical_not(Expression_ptr); extern Expression_ptr script_exp_unary_bitwise_not(Expression_ptr); extern Expression_ptr script_exp_binary_mult(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_div(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_mod(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_add(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_sub(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_lshift(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_rshift(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_eq(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_ne(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_le(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_ge(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_lt(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_gt(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_bitwise_and(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_bitwise_xor(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_bitwise_or(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_logical_and(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_binary_logical_or(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_trinary_cond(Expression_ptr, Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_integer(uint64_t); extern Expression_ptr script_exp_string(const char*, size_t); extern Expression_ptr script_exp_function_max(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_function_min(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_function_defined(const char*, size_t); extern Expression_ptr script_exp_function_sizeof_headers(void); extern Expression_ptr script_exp_function_alignof(const char*, size_t); extern Expression_ptr script_exp_function_sizeof(const char*, size_t); extern Expression_ptr script_exp_function_addr(const char*, size_t); extern Expression_ptr script_exp_function_loadaddr(const char*, size_t); extern Expression_ptr script_exp_function_origin(void*, const char*, size_t); extern Expression_ptr script_exp_function_length(void*, const char*, size_t); extern Expression_ptr script_exp_function_constant(const char*, size_t); extern Expression_ptr script_exp_function_absolute(Expression_ptr); extern Expression_ptr script_exp_function_align(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_function_data_segment_align(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_function_data_segment_relro_end(Expression_ptr, Expression_ptr); extern Expression_ptr script_exp_function_data_segment_end(Expression_ptr); extern Expression_ptr script_exp_function_segment_start(const char*, size_t, Expression_ptr); extern Expression_ptr script_exp_function_assert(Expression_ptr, const char*, size_t); extern void script_register_vers_node(void* closure, const char* tag, int taglen, struct Version_tree*, struct Version_dependency_list*); extern struct Version_dependency_list* script_add_vers_depend(void* closure, struct Version_dependency_list* existing_dependencies, const char* depend_to_add, int deplen); extern struct Version_expression_list* script_new_vers_pattern(void* closure, struct Version_expression_list*, const char*, int, int); extern struct Version_expression_list* script_merge_expressions(struct Version_expression_list* a, struct Version_expression_list* b); extern struct Version_tree* script_new_vers_node(void* closure, struct Version_expression_list* global, struct Version_expression_list* local); extern void version_script_push_lang(void* closure, const char* lang, int langlen); extern void version_script_pop_lang(void* closure); #ifdef __cplusplus } // End extern "C" #endif #ifdef __cplusplus } // End namespace gold. #endif #endif /* !defined(GOLD_SCRIPT_C_H) */