diff options
Diffstat (limited to 'nuttx/binfmt/libelf/libelf_iobuffer.c')
-rw-r--r-- | nuttx/binfmt/libelf/libelf_iobuffer.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/nuttx/binfmt/libelf/libelf_iobuffer.c b/nuttx/binfmt/libelf/libelf_iobuffer.c new file mode 100644 index 000000000..ead99ca09 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_iobuffer.c @@ -0,0 +1,136 @@ +/**************************************************************************** + * binfmt/libelf/elf_iobuffer.c + * + * Copyright (C) 2012 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; +} + |