Subversion Repositories openrisc_2011-10-31

/* script-c.h -- C interface for linker scripts in gold.  */

/* Copyright 2006, 2007, 2008 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

/* 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;

  /* 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

};

/* 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 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 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);

/* 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(const char*, size_t);

extern Expression_ptr

script_exp_function_length(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) */