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Diffstat (limited to 'nuttx/binfmt/binfmt_loadmodule.c')
-rw-r--r-- | nuttx/binfmt/binfmt_loadmodule.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/nuttx/binfmt/binfmt_loadmodule.c b/nuttx/binfmt/binfmt_loadmodule.c new file mode 100644 index 000000000..d4ef7cde2 --- /dev/null +++ b/nuttx/binfmt/binfmt_loadmodule.c @@ -0,0 +1,138 @@ +/**************************************************************************** + * binfmt/binfmt_loadmodule.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <sched.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/binfmt.h> + +#include "binfmt_internal.h" + +#ifndef CONFIG_BINFMT_DISABLE + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: load_module + * + * Description: + * Load a module into memory, bind it to an exported symbol take, and + * prep the module for execution. + * + * Returned Value: + * This is an end-user function, so it follows the normal convention: + * Returns 0 (OK) on success. On failure, it returns -1 (ERROR) with + * errno set appropriately. + * + ****************************************************************************/ + +int load_module(FAR struct binary_s *bin) +{ + FAR struct binfmt_s *binfmt; + int ret = -ENOENT; + +#ifdef CONFIG_DEBUG + if (bin && bin->filename) +#endif + { + bdbg("Loading %s\n", bin->filename); + + /* Disabling pre-emption should be sufficient protection while + * accessing the list of registered binary format handlers. + */ + + sched_lock(); + + /* Traverse the list of registered binary format handlers. Stop + * when either (1) a handler recognized and loads the format, or + * (2) no handler recognizes the format. + */ + + for (binfmt = g_binfmts; binfmt; binfmt = binfmt->next) + { + /* Use this handler to try to load the format */ + + ret = binfmt->load(bin); + if (ret == OK) + { + /* Successfully loaded -- break out with ret == 0 */ + + bvdbg("Successfully loaded module %s\n", bin->filename); + dump_module(bin); + break; + } + } + + sched_unlock(); + } + + /* This is an end-user function. Return failures via errno */ + + if (ret < 0) + { + bdbg("Returning errno %d\n", -ret); + errno = -ret; + return ERROR; + } + return OK; +} + +#endif /* CONFIG_BINFMT_DISABLE */ + |