Add exec_module

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1895 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 184 insertions, 0 deletions

diff --git a/nuttx/binfmt/binfmt_execmodule.c b/nuttx/binfmt/binfmt_execmodule.c
new file mode 100644
index 000000000..21c1bf6ac
--- /dev/null
+++ b/nuttx/binfmt/binfmt_execmodule.c
@@ -0,0 +1,184 @@
+/****************************************************************************
+ * binfmt/binfmt_execmodule.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 <sys/types.h>
+
+#include <stdlib.h>
+#include <sched.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/binfmt.h>
+
+#include "os_internal.h"
+#include "binfmt_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: exec_module
+ *
+ * Description:
+ *   Execute a module that has been loaded into memory by load_module().
+ *
+ * Returned Value:
+ *   This is an end-user function, so it follows the normal convention:
+ *   Returns the PID of the exec'ed module.  On failure, it.returns
+ *   -1 (ERROR) and sets errno appropriately.
+ *
+ ****************************************************************************/
+
+int exec_module(FAR const struct binary_s *bin, int priority)
+{
+  FAR _TCB   *tcb;
+#ifndef CONFIG_CUSTOM_STACK
+  FAR uint32 *stack;
+#endif
+  pid_t       pid;
+  int         err;
+  int         ret;
+
+  /* Sanity checking */
+
+#ifdef CONFIG_DEBUG
+  if (!bin || !bin->ispace || !bin->entrypt || bin->stacksize <= 0)
+    {
+      err = EINVAL;
+      goto errout;
+    }
+#endif
+
+  bdbg("Executing %s\n", bin->filename);
+
+  /* Allocate a TCB for the new task. */
+
+  tcb = (FAR _TCB*)zalloc(sizeof(_TCB));
+  if (!tcb)
+    {
+      err = ENOMEM;
+      goto errout;
+    }
+
+  /* Allocate the stack for the new task */
+
+#ifndef CONFIG_CUSTOM_STACK
+  stack = (FAR uint32*)malloc(bin->stacksize);
+  if (!tcb)
+    {
+      err = ENOMEM;
+      goto errout_with_tcb;
+    }
+
+  /* Initialize the task */
+
+  ret = task_init(tcb, bin->filename, priority, stack, bin->stacksize, bin->entrypt, bin->argv);
+#else
+  /* Initialize the task */
+
+  ret = task_init(tcb, bin->filename, priority, stack, bin->entrypt, bin->argv);
+#endif
+  if (ret < 0)
+    {
+      err = errno;
+      dbg("task_init() failed: %d\n", err);
+      goto errout_with_stack;
+    }
+
+  /* Add the DSpace address as the PIC base address */
+
+  tcb->picbase = bin->dspace;
+
+  /* Re-initialize the task's initial state to account for the new PIC base */
+
+  up_initial_state(tcb);
+
+  /* Get the assigned pid before we start the task */
+
+  pid = tcb->pid;
+
+  /* Then activate the task at the provided priority */
+
+  ret = task_activate(tcb);
+  if (ret < 0)
+    {
+      err = errno;
+      dbg("task_activate() failed: %d\n", err);
+      goto errout_with_stack;
+    }
+  return (int)pid;
+
+errout_with_stack:
+#ifndef CONFIG_CUSTOM_STACK
+  tcb->stack_alloc_ptr = NULL;
+  sched_releasetcb(tcb);
+  free(stack);
+#else
+  sched_releasetcb(tcb);
+#endif
+  goto errout;
+
+errout_with_tcb:
+  free(tcb);
+errout:
+  errno = err;
+  dbg("returning errno: %d\n", err);
+  return ERROR;
+}
+
+