193 lines
5.0 KiB
C
193 lines
5.0 KiB
C
/****************************************************************************
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* binfmt/binfmt_unloadmodule.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/mman.h>
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#include <stdlib.h>
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#include <sched.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/addrenv.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/binfmt/binfmt.h>
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#include "binfmt.h"
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#ifndef CONFIG_BINFMT_DISABLE
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: exec_dtors
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*
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* Description:
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* Execute C++ static destructors.
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*
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* Input Parameters:
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* binp - Load state information
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*
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* Returned Value:
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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****************************************************************************/
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#ifdef CONFIG_BINFMT_CONSTRUCTORS
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static inline int exec_dtors(FAR struct binary_s *binp)
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{
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binfmt_dtor_t *dtor = binp->dtors;
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#ifdef CONFIG_ARCH_ADDRENV
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int ret;
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#endif
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int i;
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/* Instantiate the address environment containing the destructors */
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#ifdef CONFIG_ARCH_ADDRENV
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ret = addrenv_select(binp->addrenv, &binp->oldenv);
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if (ret < 0)
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{
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berr("ERROR: addrenv_select() failed: %d\n", ret);
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return ret;
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}
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#endif
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/* Execute each destructor */
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for (i = 0; i < binp->ndtors; i++)
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{
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binfo("Calling dtor %d at %p\n", i, dtor);
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(*dtor)();
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dtor++;
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}
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/* Restore the address environment */
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#ifdef CONFIG_ARCH_ADDRENV
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return addrenv_restore(binp->oldenv);
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#else
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return OK;
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#endif
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: unload_module
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*
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* Description:
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* Unload a (non-executing) module from memory. If the module has
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* been started (via exec_module) and has not exited, calling this will
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* be fatal.
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*
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* However, this function must be called after the module exits. How
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* this is done is up to your logic. Perhaps you register it to be
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* called by on_exit()?
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*
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* Returned Value:
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* This is a NuttX internal function so it follows the convention that
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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****************************************************************************/
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int unload_module(FAR struct binary_s *binp)
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{
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int ret;
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int i;
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if (binp)
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{
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/* Perform any format-specific unload operations */
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if (binp->unload)
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{
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ret = binp->unload(binp);
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if (ret < 0)
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{
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berr("binp->unload() failed: %d\n", ret);
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return ret;
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}
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}
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#ifdef CONFIG_BINFMT_CONSTRUCTORS
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/* Execute C++ destructors */
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ret = exec_dtors(binp);
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if (ret < 0)
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{
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berr("exec_ctors() failed: %d\n", ret);
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return ret;
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}
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#endif
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/* Unmap mapped address spaces */
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if (binp->mapped)
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{
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binfo("Unmapping address space: %p\n", binp->mapped);
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file_munmap(binp->mapped, binp->mapsize);
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}
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/* Free allocated address spaces */
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for (i = 0; i < BINFMT_NALLOC; i++)
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{
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if (binp->alloc[i])
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{
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binfo("Freeing alloc[%d]: %p\n", i, binp->alloc[i]);
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#if defined(CONFIG_ARCH_USE_TEXT_HEAP)
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if (i == 0)
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{
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up_textheap_free(binp->alloc[i]);
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}
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else
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#endif
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{
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kumm_free(binp->alloc[i]);
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}
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}
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}
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/* Notice that the address environment is not destroyed. This should
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* happen automatically when the task exits.
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*/
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}
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return OK;
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}
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#endif /* CONFIG_BINFMT_DISABLE */
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