diff options
Diffstat (limited to 'nuttx/binfmt/libelf/libelf_unload.c')
-rw-r--r-- | nuttx/binfmt/libelf/libelf_unload.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/nuttx/binfmt/libelf/libelf_unload.c b/nuttx/binfmt/libelf/libelf_unload.c new file mode 100644 index 000000000..539e5faf7 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_unload.c @@ -0,0 +1,114 @@ +/**************************************************************************** + * binfmt/libelf/libelf_unload.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 <stdlib.h> +#include <debug.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_unload + * + * Description: + * This function unloads the object from memory. This essentially undoes + * the actions of elf_load. It is called only under certain error + * conditions after the the module has been loaded but not yet started. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_unload(struct elf_loadinfo_s *loadinfo) +{ + /* Free all working buffers */ + + elf_freebuffers(loadinfo); + + /* Release memory holding the relocated ELF image */ + + elf_addrenv_free(loadinfo); + + /* Release memory used to hold static constructors and destructors */ + +#ifdef CONFIG_BINFMT_CONSTRUCTORS + if (loadinfo->ctoralloc != 0) + { + kfree(loadinfo->ctoralloc); + loadinfo->ctoralloc = NULL; + } + + loadinfo->ctors = NULL; + loadinfo->nctors = 0; + + if (loadinfo->dtoralloc != 0) + { + kfree(loadinfo->dtoralloc); + loadinfo->dtoralloc = NULL; + } + + loadinfo->dtors = NULL; + loadinfo->ndtors = 0; +#endif + + return OK; +} + |