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/****************************************************************************
* examples/pashello/pashello.c
*
* Copyright (C) 2008-2009, 2011 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 <stdio.h>
#include <stdlib.h>
#include <debug.h>
#include "apps/pcode/insn/pexec.h"
#include "apps/pcode/pedefs.h"
#include "pashello.h"
/****************************************************************************
* Definitions
****************************************************************************/
#ifndef CONFIG_PASHELLO_VARSTACKSIZE
# define CONFIG_PASHELLO_VARSTACKSIZE 1024
#endif
#ifndef CONFIG_PASHELLO_STRSTACKSIZE
# define CONFIG_PASHELLO_STRSTACKSIZE 128
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: prun
*
* Description:
* This function executes the P-Code program until a stopping condition
* is encountered.
*
****************************************************************************/
static void prun(FAR struct pexec_s *st)
{
int errcode;
for (;;)
{
/* Execute the instruction; Check for exceptional conditions */
errcode = pexec(st);
if (errcode != eNOERROR) break;
}
if (errcode != eEXIT)
{
printf("Runtime error 0x%02x -- Execution Stopped\n", errcode);
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* user_start
****************************************************************************/
int user_start(int argc, FAR char *argv[])
{
FAR struct pexec_s *st;
/* Register the /dev/hello driver */
hello_register();
/* Load the POFF file */
st = pload("/dev/hello", CONFIG_PASHELLO_VARSTACKSIZE, CONFIG_PASHELLO_STRSTACKSIZE);
if (!st)
{
fprintf(stderr, "user_start: ERROR: Could not load /dev/hello\n");
exit(1);
}
printf("user_start: /dev/hello Loaded\n");
printf("user_start: Interpreter started:\n");
/* And start program execution */
prun(st);
/* Clean up resources used by the interpreter */
printf("user_start: Interpreter terminated");
pexec_release(st);
return 0;
}
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