incubator-nuttx/binfmt/binfmt.h

/****************************************************************************
 * binfmt/binfmt.h
 *
 *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

#ifndef __BINFMT_BINFMT_H
#define __BINFMT_BINFMT_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <nuttx/binfmt/binfmt.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

/* This is a list of registered handlers for different binary formats.  This
 * list should only be accessed by normal user programs.  It should be sufficient
 * protection to simply disable pre-emption when accessing this list.
 */

EXTERN FAR struct binfmt_s *g_binfmts;

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: dump_module
 *
 * Description:
 *   Dump the contents of struct binary_s.
 *
 * Input Parameters:
 *   bin      - Load structure
 *
 * Returned Value:
 *   Zero (OK) on success; a negated errno value on failure
 *
 ****************************************************************************/

#if defined(CONFIG_DEBUG_FEATURES) && defined(CONFIG_DEBUG_BINFMT)
int dump_module(FAR const struct binary_s *bin);
#else
#  define dump_module(bin)
#endif

/****************************************************************************
 * Name: binfmt_copyargv
 *
 * Description:
 *   In the kernel build, the argv list will likely lie in the caller's
 *   address environment and, hence, by inaccessible when we swith to the
 *   address environment of the new process address environment.  So we
 *   do not have any real option other than to copy the callers argv[] list.
 *
 * Input Parameters:
 *   bin      - Load structure
 *   argv     - Argument list
 *
 * Returned Value:
 *   Zero (OK) on success; a negated errno value on failure.
 *
 ****************************************************************************/

int binfmt_copyargv(FAR struct binary_s *bin, FAR char * const *argv);

/****************************************************************************
 * Name: binfmt_freeargv
 *
 * Description:
 *   Release the copied argv[] list.
 *
 * Input Parameters:
 *   bin      - Load structure
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
void binfmt_freeargv(FAR struct binary_s *bin);
#else
#  define binfmt_freeargv(bin)
#endif

/****************************************************************************
 * Name: builtin_initialize
 *
 * Description:
 *   In order to use the builtin binary format, this function must be called
 *   during system initialize to register the builtin binary format.
 *
 * Returned Value:
 *   This is a NuttX internal function so it follows the convention that
 *   0 (OK) is returned on success and a negated errno is returned on
 *   failure.
 *
 ****************************************************************************/

#if defined(CONFIG_FS_BINFS) && defined(HAVE_BUILTIN_CONTEXT)
int builtin_initialize(void);
#endif

/****************************************************************************
 * Name: builtin_uninitialize
 *
 * Description:
 *   Unregister the builtin binary loader
 *
 * Returned Value:
 *   None
 *
 ****************************************************************************/

#if defined(CONFIG_FS_BINFS) && defined(HAVE_BUILTIN_CONTEXT)
void builtin_uninitialize(void);
#endif

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif /* __BINFMT_BINFMT_H */