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incubator-nuttx/binfmt/binfmt_execmodule.c

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/****************************************************************************
* binfmt/binfmt_execmodule.c
*
* Copyright (C) 2009, 2013-2014 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 <sys/types.h>
#include <stdint.h>
#include <stdlib.h>
#include <sched.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/mm/mm.h>
#include <nuttx/mm/shm.h>
#include <nuttx/binfmt/binfmt.h>
#include "sched/sched.h"
#include "binfmt_internal.h"
#ifndef CONFIG_BINFMT_DISABLE
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* If C++ constructors are used, then CONFIG_SCHED_STARTHOOK must also be
* selected be the start hook is used to schedule execution of the
* constructors.
*/
#if defined(CONFIG_BINFMT_CONSTRUCTORS) && !defined(CONFIG_SCHED_STARTHOOK)
# errror "CONFIG_SCHED_STARTHOOK must be defined to use constructors"
#endif
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: exec_ctors
*
* Description:
* Execute C++ static constructors. This function is registered as a
* start hook and runs on the thread of the newly created task before
* the new task's main function is called.
*
* Input Parameters:
* loadinfo - Load state information
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
#ifdef CONFIG_BINFMT_CONSTRUCTORS
static void exec_ctors(FAR void *arg)
{
FAR const struct binary_s *binp = (FAR const struct binary_s *)arg;
binfmt_ctor_t *ctor = binp->ctors;
int i;
/* Execute each constructor */
for (i = 0; i < binp->nctors; i++)
{
bvdbg("Calling ctor %d at %p\n", i, (FAR void *)ctor);
(*ctor)();
ctor++;
}
}
#endif
/****************************************************************************
* 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 *binp)
{
FAR struct task_tcb_s *tcb;
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
save_addrenv_t oldenv;
#endif
FAR uint32_t *stack;
pid_t pid;
int err;
int ret;
/* Sanity checking */
#ifdef CONFIG_DEBUG
if (!binp || !binp->entrypt || binp->stacksize <= 0)
{
err = EINVAL;
goto errout;
}
#endif
bvdbg("Executing %s\n", binp->filename);
/* Allocate a TCB for the new task. */
tcb = (FAR struct task_tcb_s*)kmm_zalloc(sizeof(struct task_tcb_s));
if (!tcb)
{
err = ENOMEM;
goto errout;
}
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* Instantiate the address environment containing the user heap */
ret = up_addrenv_select(&binp->addrenv, &oldenv);
if (ret < 0)
{
bdbg("ERROR: up_addrenv_select() failed: %d\n", ret);
err = -ret;
goto errout_with_tcb;
}
/* Initialize the user heap */
umm_initialize((FAR void *)CONFIG_ARCH_HEAP_VBASE,
up_addrenv_heapsize(&binp->addrenv));
#endif
/* Allocate the stack for the new task.
*
* REVISIT: This allocation is currently always from the user heap. That
* will need to change if/when we want to support dynamic stack allocation.
*/
stack = (FAR uint32_t*)kumm_malloc(binp->stacksize);
if (!stack)
{
err = ENOMEM;
goto errout_with_addrenv;
}
/* Initialize the task */
ret = task_init((FAR struct tcb_s *)tcb, binp->filename, binp->priority,
stack, binp->stacksize, binp->entrypt, binp->argv);
if (ret < 0)
{
err = get_errno();
bdbg("task_init() failed: %d\n", err);
goto errout_with_addrenv;
}
/* We can free the argument buffer now.
* REVISIT: It is good to free up memory as soon as possible, but
* unfortunately here 'binp' is 'const'. So to do this properly, we will
* have to make some more extensive changes.
*/
binfmt_freeargv((FAR struct binary_s *)binp);
/* Note that tcb->flags are not modified. 0=normal task */
/* tcb->flags |= TCB_FLAG_TTYPE_TASK; */
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* Allocate the kernel stack */
ret = up_addrenv_kstackalloc(&tcb->cmn);
if (ret < 0)
{
bdbg("ERROR: up_addrenv_select() failed: %d\n", ret);
err = -ret;
goto errout_with_tcbinit;
}
#endif
#if defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_MM_SHM)
/* Initialize the shared memory virtual page allocator */
ret = shm_group_initialize(tcb->cmn.group);
if (ret < 0)
{
bdbg("ERROR: shm_group_initialize() failed: %d\n", ret);
err = -ret;
goto errout_with_tcbinit;
}
#endif
#ifdef CONFIG_PIC
/* Add the D-Space address as the PIC base address. By convention, this
* must be the first allocated address space.
*/
tcb->cmn.dspace = binp->alloc[0];
/* Re-initialize the task's initial state to account for the new PIC base */
up_initial_state(&tcb->cmn);
#endif
#ifdef CONFIG_ARCH_ADDRENV
/* Assign the address environment to the new task group */
ret = up_addrenv_clone(&binp->addrenv, &tcb->cmn.group->tg_addrenv);
if (ret < 0)
{
err = -ret;
bdbg("ERROR: up_addrenv_clone() failed: %d\n", ret);
goto errout_with_tcbinit;
}
/* Mark that this group has an address environment */
tcb->cmn.group->tg_flags |= GROUP_FLAG_ADDRENV;
#endif
#ifdef CONFIG_BINFMT_CONSTRUCTORS
/* Setup a start hook that will execute all of the C++ static constructors
* on the newly created thread. The struct binary_s must persist at least
* until the new task has been started.
*/
task_starthook(tcb, exec_ctors, (FAR void *)binp);
#endif
/* Get the assigned pid before we start the task */
pid = tcb->cmn.pid;
/* Then activate the task at the provided priority */
ret = task_activate((FAR struct tcb_s *)tcb);
if (ret < 0)
{
err = get_errno();
bdbg("task_activate() failed: %d\n", err);
goto errout_with_tcbinit;
}
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* Restore the address environment of the caller */
ret = up_addrenv_restore(&oldenv);
if (ret < 0)
{
bdbg("ERROR: up_addrenv_select() failed: %d\n", ret);
err = -ret;
goto errout_with_tcbinit;
}
#endif
return (int)pid;
errout_with_tcbinit:
tcb->cmn.stack_alloc_ptr = NULL;
sched_releasetcb(&tcb->cmn, TCB_FLAG_TTYPE_TASK);
kumm_free(stack);
goto errout;
errout_with_addrenv:
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
(void)up_addrenv_restore(&oldenv);
errout_with_tcb:
#endif
kmm_free(tcb);
errout:
set_errno(err);
bdbg("returning errno: %d\n", err);
return ERROR;
}
#endif /* CONFIG_BINFMT_DISABLE */
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