/* script-c.h -- C interface for linker scripts in gold. */
-/* Copyright 2006, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2006-2020 Free Software Foundation, Inc.
Written by Ian Lance Taylor <iant@google.com>.
This file is part of gold.
#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 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*);
+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. */
/* Called by the bison parser to set the entry symbol. */
extern void
-script_set_entry(void* closure, const char*);
+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_parse_option(void* closure, const char*);
+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) */
projects / deliverable / binutils-gdb.git / blobdiff