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incubator-nuttx/binfmt/binfmt_execmodule.c

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/****************************************************************************
* binfmt/binfmt_execmodule.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* 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/sched.h>
#include <nuttx/binfmt/binfmt.h>
#include "binfmt.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)
# error "CONFIG_SCHED_STARTHOOK must be defined to use constructors"
#endif
/****************************************************************************
* 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:
* arg - Argument is instance of load state info structure cast to void *.
*
* 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++)
{
binfo("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 a NuttX internal function so it follows the convention that
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int exec_module(FAR const struct binary_s *binp,
FAR const char *filename, FAR char * const *argv,
FAR char * const *envp)
{
FAR struct task_tcb_s *tcb;
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
save_addrenv_t oldenv;
FAR void *vheap;
#endif
FAR void *stackaddr = NULL;
pid_t pid;
int ret;
/* Sanity checking */
#ifdef CONFIG_DEBUG_FEATURES
if (!binp || !binp->entrypt || binp->stacksize <= 0)
{
return -EINVAL;
}
#endif
binfo("Executing %s\n", filename);
/* Allocate a TCB for the new task. */
tcb = (FAR struct task_tcb_s *)kmm_zalloc(sizeof(struct task_tcb_s));
if (!tcb)
{
return -ENOMEM;
}
ret = binfmt_copyargv(&argv, argv);
if (ret < 0)
{
goto errout_with_tcb;
}
/* Make a copy of the environment here */
if (envp == NULL)
{
envp = environ;
}
ret = binfmt_copyenv(&envp, envp);
if (ret < 0)
{
goto errout_with_args;
}
#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)
{
berr("ERROR: up_addrenv_select() failed: %d\n", ret);
goto errout_with_envp;
}
ret = up_addrenv_vheap(&binp->addrenv, &vheap);
if (ret < 0)
{
berr("ERROR: up_addrenv_vheap() failed: %d\n", ret);
goto errout_with_addrenv;
}
binfo("Initialize the user heap (heapsize=%zu)\n",
up_addrenv_heapsize(&binp->addrenv));
umm_initialize(vheap, up_addrenv_heapsize(&binp->addrenv));
#endif
/* Note that tcb->flags are not modified. 0=normal task */
/* tcb->flags |= TCB_FLAG_TTYPE_TASK; */
/* Initialize the task */
#ifndef CONFIG_BUILD_KERNEL
stackaddr = binp->stackaddr;
#endif
if (argv && argv[0])
{
ret = nxtask_init(tcb, argv[0], binp->priority, stackaddr,
binp->stacksize, binp->entrypt, &argv[1], envp);
}
else
{
ret = nxtask_init(tcb, filename, binp->priority, stackaddr,
binp->stacksize, binp->entrypt, argv, envp);
}
if (ret < 0)
{
berr("nxtask_init() failed: %d\n", ret);
goto errout_with_addrenv;
}
/* The copied argv and envp can now be released */
binfmt_freeargv(argv);
binfmt_freeenv(envp);
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_ARCH_KERNEL_STACK)
/* Allocate the kernel stack */
ret = up_addrenv_kstackalloc(&tcb->cmn);
if (ret < 0)
{
berr("ERROR: up_addrenv_kstackalloc() failed: %d\n", 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)
{
berr("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.
*/
if (binp->nctors > 0)
{
nxtask_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 */
nxtask_activate((FAR struct tcb_s *)tcb);
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* Restore the address environment of the caller */
ret = up_addrenv_restore(&oldenv);
if (ret < 0)
{
berr("ERROR: up_addrenv_restore() failed: %d\n", ret);
goto errout_with_tcbinit;
}
#endif
return (int)pid;
#if defined(CONFIG_ARCH_ADDRENV) || defined(CONFIG_ARCH_VMA_MAPPING)
errout_with_tcbinit:
tcb->cmn.stack_alloc_ptr = NULL;
nxsched_release_tcb(&tcb->cmn, TCB_FLAG_TTYPE_TASK);
return ret;
#endif
errout_with_addrenv:
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
up_addrenv_restore(&oldenv);
errout_with_envp:
#endif
binfmt_freeenv(envp);
errout_with_args:
binfmt_freeargv(argv);
errout_with_tcb:
kmm_free(tcb);
return ret;
}
#endif /* CONFIG_BINFMT_DISABLE */
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