271 lines
8.1 KiB
C
271 lines
8.1 KiB
C
/****************************************************************************
|
|
* binfmt/binfmt_loadmodule.c
|
|
*
|
|
* Copyright (C) 2009, 2014 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 <sched.h>
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/kmalloc.h>
|
|
#include <nuttx/binfmt/binfmt.h>
|
|
|
|
#include "binfmt_internal.h"
|
|
|
|
#ifndef CONFIG_BINFMT_DISABLE
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: load_default_priority
|
|
*
|
|
* Description:
|
|
* Set the default priority of the module to be loaded. This may be
|
|
* changed (1) by the actions of the binary format's load() method if
|
|
* the binary format contains priority informaition, or (2) by the user
|
|
* between calls to load_module() and exec_module().
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; Otherwise, -1 (ERROR) is returned and
|
|
* the errno variable is set appropriately.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int load_default_priority(FAR struct binary_s *bin)
|
|
{
|
|
struct sched_param param;
|
|
int ret;
|
|
|
|
/* Get the priority of this thread */
|
|
|
|
ret = sched_getparam(0, ¶m);
|
|
if (ret < 0)
|
|
{
|
|
bdbg("ERROR: sched_getparam failed: %d\n", errno);
|
|
return ERROR;
|
|
}
|
|
|
|
/* Save that as the priority of child thread */
|
|
|
|
bin->priority = param.sched_priority;
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: load_absmodule
|
|
*
|
|
* Description:
|
|
* Load a module into memory, bind it to an exported symbol take, and
|
|
* prep the module for execution. bin->filename is known to be an absolute
|
|
* path to the file to be loaded.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int load_absmodule(FAR struct binary_s *bin)
|
|
{
|
|
FAR struct binfmt_s *binfmt;
|
|
int ret = -ENOENT;
|
|
|
|
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();
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* 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)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
/* Verify that we were provided something to work with */
|
|
|
|
#ifdef CONFIG_DEBUG
|
|
if (bin && bin->filename)
|
|
#endif
|
|
{
|
|
/* Set the default priority of the new program. */
|
|
|
|
ret = load_default_priority(bin);
|
|
if (ret < 0)
|
|
{
|
|
/* The errno is already set in this case */
|
|
|
|
return ERROR;
|
|
}
|
|
|
|
/* Were we given a relative path? Or an absolute path to the file to
|
|
* be loaded? Absolute paths start with '/'.
|
|
*/
|
|
|
|
#ifdef CONFIG_BINFMT_EXEPATH
|
|
if (bin->filename[0] != '/')
|
|
{
|
|
FAR const char *relpath;
|
|
FAR char *fullpath;
|
|
EXEPATH_HANDLE handle;
|
|
|
|
/* Set aside the relative path */
|
|
|
|
relpath = bin->filename;
|
|
ret = -ENOENT;
|
|
|
|
/* Initialize to traverse the PATH variable */
|
|
|
|
handle = exepath_init();
|
|
if (handle)
|
|
{
|
|
/* Get the next absolute file path */
|
|
|
|
while ((fullpath = exepath_next(handle, relpath)) != NULL)
|
|
{
|
|
/* Try to load the file at this path */
|
|
|
|
bin->filename = fullpath;
|
|
ret = load_absmodule(bin);
|
|
|
|
/* Free the allocated fullpath */
|
|
|
|
kfree(fullpath);
|
|
|
|
/* Break out of the loop with ret == OK on success */
|
|
|
|
if (ret == OK)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Release the traversal handle */
|
|
|
|
exepath_release(handle);
|
|
}
|
|
|
|
/* Restore the relative path. This is not needed for anything
|
|
* but debug output after the file has been loaded.
|
|
*/
|
|
|
|
bin->filename = relpath;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
/* We already have the one and only absolute path to the file to
|
|
* be loaded.
|
|
*/
|
|
|
|
ret = load_absmodule(bin);
|
|
}
|
|
}
|
|
|
|
/* 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 */
|
|
|