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/****************************************************************************
* binfmt/libelf/elf_iobuffer.c
*
* Copyright (C) 2012-2013 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 <nuttx/config.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/kmalloc.h>
#include <nuttx/binfmt/elf.h>
#include "libelf.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Constant Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: elf_allocbuffer
*
* Description:
* Perform the initial allocation of the I/O buffer, if it has not already
* been allocated.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo)
{
/* Has a buffer been allocated> */
if (!loadinfo->iobuffer)
{
/* No.. allocate one now */
loadinfo->iobuffer = (FAR uint8_t *)kmalloc(CONFIG_ELF_BUFFERSIZE);
if (!loadinfo->iobuffer)
{
bdbg("Failed to allocate an I/O buffer\n");
return -ENOMEM;
}
loadinfo->buflen = CONFIG_ELF_BUFFERSIZE;
}
return OK;
}
/****************************************************************************
* Name: elf_reallocbuffer
*
* Description:
* Increase the size of I/O buffer by the specified buffer increment.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment)
{
FAR void *buffer;
size_t newsize;
/* Get the new size of the allocation */
newsize = loadinfo->buflen + increment;
/* And perform the reallocation */
buffer = krealloc((FAR void *)loadinfo->iobuffer, newsize);
if (!buffer)
{
bdbg("Failed to reallocate the I/O buffer\n");
return -ENOMEM;
}
/* Save the new buffer info */
loadinfo->iobuffer = buffer;
loadinfo->buflen = newsize;
return OK;
}
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