text: /****************************************************************************
   *
   * Copyright 2019 Samsung Electronics All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied. See the License for the specific
   * language governing permissions and limitations under the License.
   *
   ****************************************************************************/
  /****************************************************************************
   * os/binfmt/binfmt_exit.c
   *
   *   Copyright (C) 2013, 2016-2018 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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <tinyara/config.h>
  
  #include <sys/types.h>
  #include <assert.h>
  #include <debug.h>
  #ifdef CONFIG_APP_BINARY_SEPARATION
  #include <queue.h>
  #ifdef CONFIG_SAVE_BIN_SECTION_ADDR
  #include "libelf/libelf.h"
  #endif
  #endif
  
  #include <tinyara/kmalloc.h>
  #include <tinyara/binfmt/binfmt.h>
  
  #include "binfmt.h"
  
  #ifdef CONFIG_BINFMT_LOADABLE
  #ifdef CONFIG_APP_BINARY_SEPARATION
  extern volatile sq_queue_t g_delayed_kufree;
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: binfmt_exit
   *
   * Description:
   *   This function may be called when a tasked loaded into RAM exits.
   *   This function will unload the module when the task exits and reclaim
   *   all resources used by the module.
   *
   * Input Parameters:
   *   bin - This structure must have been allocated with kmm_malloc() and must
   *         persist until the task unloads
   *
   * Returned Value:
   *   This is a internal function so it follows the convention that
   *   0 (OK) is returned on success and a negated errno is returned on
   *   failure.
   *
   ****************************************************************************/
  
  int binfmt_exit(FAR struct binary_s *bin)
  {
  	int ret;
  #ifdef CONFIG_APP_BINARY_SEPARATION
  	irqstate_t flags;
  	FAR void *address;
  	uint32_t uheap_start;
  	uint32_t uheap_end;
  #endif
  	DEBUGASSERT(bin != NULL);
  
  	/* Unload the module */
  
  	ret = unload_module(bin);
  	if (ret < 0) {
  		berr("ERROR: unload_module() failed: %d\n", ret);
  	}
  
  #ifdef CONFIG_SAVE_BIN_SECTION_ADDR
  	elf_delete_bin_section_addr(bin);
  #endif
  
  #ifdef CONFIG_APP_BINARY_SEPARATION
  	uheap_start = (uint32_t)bin->uheap;
  	uheap_end = uheap_start + bin->uheap_size;
  
  	/* Remove resources which in binary to be unloaded from delayed deallocation. */
  	address = sq_peek(&g_delayed_kufree);
  	while (address) {
  		mllvdbg("Remove addr %p from deplaed kufree, uheap (%p, %p)\n", address, uheap_start, uheap_end);
  		if (uheap_start <= (uint32_t)address && (uint32_t)address <= uheap_end) {
  			flags = irqsave();
  			sq_rem((FAR sq_entry_t *)address, (FAR sq_queue_t *)&g_delayed_kufree);
  			irqrestore(flags);
  		}
  		address = (FAR void *)sq_next((FAR sq_entry_t *)address);
  	}
  #ifndef CONFIG_OPTIMIZE_APP_RELOAD_TIME
  	/* Free the RAM partition into which this app was loaded */
  	kumm_free((void *)bin->ramstart);
  #endif
  #endif
  	/* Free the load structure */
  
  #ifdef CONFIG_OPTIMIZE_APP_RELOAD_TIME
  	if (!bin->reload)
  #endif
  		kmm_free(bin);
  
  	return ret;
  }
  
  #endif							/* CONFIG_BINFMT_LOADABLE */
  