52482219c8
Renaming "modlib" to "libelf" is more in line with the implementation content, which makes it easier for individual developers to understand the capabilities of this module. CONFIG_LIBC_MODLIB -> CONFIG_LIBC_ELF Signed-off-by: chao an <anchao.archer@bytedance.com>
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/****************************************************************************
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* libs/libc/elf/elf_unload.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 <stdlib.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/lib/elf.h>
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#include "libc.h"
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#include "elf/elf.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: libelf_unload
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*
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* Description:
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* This function unloads the object from memory. This essentially undoes
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* the actions of libelf_load(). It is called only under certain error
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* conditions after the module has been loaded but not yet started.
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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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int libelf_unload(FAR struct mod_loadinfo_s *loadinfo)
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{
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/* Free all working buffers */
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libelf_freebuffers(loadinfo);
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#ifdef CONFIG_ARCH_ADDRENV
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if (loadinfo->addrenv != NULL)
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{
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libelf_addrenv_free(loadinfo);
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}
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else
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#endif
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/* Release memory holding the relocated ELF image */
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/* ET_DYN has a single allocation so we only free textalloc */
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if (loadinfo->ehdr.e_type != ET_DYN)
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{
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#ifdef CONFIG_ARCH_USE_SEPARATED_SECTION
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int i;
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for (i = 0; loadinfo->sectalloc[i] != 0 &&
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i < loadinfo->ehdr.e_shnum; i++)
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{
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# ifdef CONFIG_ARCH_USE_TEXT_HEAP
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if (up_textheap_heapmember((FAR void *)loadinfo->sectalloc[i]))
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{
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up_textheap_free((FAR void *)loadinfo->sectalloc[i]);
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}
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else
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# endif
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# ifdef CONFIG_ARCH_USE_DATA_HEAP
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if (up_dataheap_heapmember((FAR void *)loadinfo->sectalloc[i]))
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{
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up_dataheap_free((FAR void *)loadinfo->sectalloc[i]);
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}
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else
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# endif
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{
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lib_free((FAR void *)loadinfo->sectalloc[i]);
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}
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}
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lib_free(loadinfo->sectalloc);
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#else
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if (loadinfo->textalloc != 0 && loadinfo->xipbase == 0)
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{
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# if defined(CONFIG_ARCH_USE_TEXT_HEAP)
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up_textheap_free((FAR void *)loadinfo->textalloc);
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# else
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lib_free((FAR void *)loadinfo->textalloc);
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# endif
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}
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if (loadinfo->datastart != 0)
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{
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# if defined(CONFIG_ARCH_USE_DATA_HEAP)
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up_dataheap_free((FAR void *)loadinfo->datastart);
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# else
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lib_free((FAR void *)loadinfo->datastart);
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# endif
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}
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#endif
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}
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else
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{
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lib_free((FAR void *)loadinfo->textalloc);
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}
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/* Clear out all indications of the allocated address environment */
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loadinfo->textalloc = 0;
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loadinfo->datastart = 0;
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loadinfo->textsize = 0;
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loadinfo->datasize = 0;
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return OK;
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}
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