121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/****************************************************************************
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* binfmt/libelf/libelf_iobuffer.c
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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 <debug.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/binfmt/elf.h>
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#include "libelf.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Constant Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: elf_allocbuffer
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*
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* Description:
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* Perform the initial allocation of the I/O buffer, if it has not already
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* been allocated.
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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 elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo)
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{
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/* Has a buffer been allocated? */
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if (!loadinfo->iobuffer)
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{
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/* No.. allocate one now */
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loadinfo->iobuffer = kmm_malloc(CONFIG_ELF_BUFFERSIZE);
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if (!loadinfo->iobuffer)
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{
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berr("Failed to allocate an I/O buffer\n");
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return -ENOMEM;
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}
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loadinfo->buflen = CONFIG_ELF_BUFFERSIZE;
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}
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return OK;
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}
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/****************************************************************************
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* Name: elf_reallocbuffer
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*
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* Description:
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* Increase the size of I/O buffer by the specified buffer increment.
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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 elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment)
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{
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FAR void *buffer;
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size_t newsize;
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/* Get the new size of the allocation */
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newsize = loadinfo->buflen + increment;
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/* And perform the reallocation */
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buffer = kmm_realloc(loadinfo->iobuffer, newsize);
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if (!buffer)
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{
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berr("Failed to reallocate the I/O buffer\n");
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return -ENOMEM;
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}
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/* Save the new buffer info */
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loadinfo->iobuffer = buffer;
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loadinfo->buflen = newsize;
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return OK;
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}
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