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/* Interface between GCC C FE and GDB

   Copyright (C) 2014-2015 Free Software Foundation, Inc.

   This file is part of GCC.

   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, see .  */

#ifndef GCC_C_INTERFACE_H

#define GCC_C_INTERFACE_H

#include "gcc-interface.h"

/* This header defines the interface to the GCC API.  It must be both

   valid C and valid C++, because it is included by both programs.  */

#ifdef __cplusplus

extern "C" {

#endif

/* Forward declaration.  */

struct gcc_c_context;

/*

 * Definitions and declarations for the C front end.

 */

/* Defined versions of the C front-end API.  */

enum gcc_c_api_version

{

  GCC_C_FE_VERSION_0 = 0

};

/* Qualifiers.  */

enum gcc_qualifiers

{

  GCC_QUALIFIER_CONST = 1,

  GCC_QUALIFIER_VOLATILE = 2,

  GCC_QUALIFIER_RESTRICT = 4

};

/* This enumerates the kinds of decls that GDB can create.  */

enum gcc_c_symbol_kind

{

  /* A function.  */

  GCC_C_SYMBOL_FUNCTION,

  /* A variable.  */

  GCC_C_SYMBOL_VARIABLE,

  /* A typedef.  */

  GCC_C_SYMBOL_TYPEDEF,

  /* A label.  */

  GCC_C_SYMBOL_LABEL

};

/* This enumerates the types of symbols that GCC might request from

   GDB.  */

enum gcc_c_oracle_request

{

  /* An ordinary symbol -- a variable, function, typedef, or enum

     constant.  */

  GCC_C_ORACLE_SYMBOL,

  /* A struct, union, or enum tag.  */

  GCC_C_ORACLE_TAG,

  /* A label.  */

  GCC_C_ORACLE_LABEL

};

/* The type of the function called by GCC to ask GDB for a symbol's

   definition.  DATUM is an arbitrary value supplied when the oracle

   function is registered.  CONTEXT is the GCC context in which the

   request is being made.  REQUEST specifies what sort of symbol is

   being requested, and IDENTIFIER is the name of the symbol.  */

typedef void gcc_c_oracle_function (void *datum,

				    struct gcc_c_context *context,

				    enum gcc_c_oracle_request request,

				    const char *identifier);

/* The type of the function called by GCC to ask GDB for a symbol's

   address.  This should return 0 if the address is not known.  */

typedef gcc_address gcc_c_symbol_address_function (void *datum,

						   struct gcc_c_context *ctxt,

						   const char *identifier);

/* An array of types used for creating a function type.  */

struct gcc_type_array

{

  /* Number of elements.  */

  int n_elements;

  /* The elements.  */

  gcc_type *elements;

};

/* The vtable used by the C front end.  */

struct gcc_c_fe_vtable

{

  /* The version of the C interface.  The value is one of the

     gcc_c_api_version constants.  */

  unsigned int c_version;

  /* Set the callbacks for this context.

     The binding oracle is called whenever the C parser needs to look

     up a symbol.  This gives the caller a chance to lazily

     instantiate symbols using other parts of the gcc_c_fe_interface

     API.

     The address oracle is called whenever the C parser needs to look

     up a symbol.  This is only called for symbols not provided by the

     symbol oracle -- that is, just built-in functions where GCC

     provides the declaration.

     DATUM is an arbitrary piece of data that is passed back verbatim

     to the callbakcs in requests.  */

  void (*set_callbacks) (struct gcc_c_context *self,

			 gcc_c_oracle_function *binding_oracle,

			 gcc_c_symbol_address_function *address_oracle,

			 void *datum);

#define GCC_METHOD0(R, N) \

  R (*N) (struct gcc_c_context *);

#define GCC_METHOD1(R, N, A) \

  R (*N) (struct gcc_c_context *, A);

#define GCC_METHOD2(R, N, A, B) \

  R (*N) (struct gcc_c_context *, A, B);

#define GCC_METHOD3(R, N, A, B, C) \

  R (*N) (struct gcc_c_context *, A, B, C);

#define GCC_METHOD4(R, N, A, B, C, D) \

  R (*N) (struct gcc_c_context *, A, B, C, D);

#define GCC_METHOD5(R, N, A, B, C, D, E) \

  R (*N) (struct gcc_c_context *, A, B, C, D, E);

#define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \

  R (*N) (struct gcc_c_context *, A, B, C, D, E, F, G);

#include "gcc-c-fe.def"

#undef GCC_METHOD0

#undef GCC_METHOD1

#undef GCC_METHOD2

#undef GCC_METHOD3

#undef GCC_METHOD4

#undef GCC_METHOD5

#undef GCC_METHOD7

};

/* The C front end object.  */

struct gcc_c_context

{

  /* Base class.  */

  struct gcc_base_context base;

  /* Our vtable.  This is a separate field because this is simpler

     than implementing a vtable inheritance scheme in C.  */

  const struct gcc_c_fe_vtable *c_ops;

};

/* The name of the .so that the compiler builds.  We dlopen this

   later.  */

#define GCC_C_FE_LIBCC libcc1.so

/* The compiler exports a single initialization function.  This macro

   holds its name as a symbol.  */

#define GCC_C_FE_CONTEXT gcc_c_fe_context

/* The type of the initialization function.  The caller passes in the

   desired base version and desired C-specific version.  If the

   request can be satisfied, a compatible gcc_context object will be

   returned.  Otherwise, the function returns NULL.  */

typedef struct gcc_c_context *gcc_c_fe_context_function

    (enum gcc_base_api_version,

     enum gcc_c_api_version);

#ifdef __cplusplus

}

#endif

#endif /* GCC_C_INTERFACE_H */