/****************************************************************************
* pload.c
*
* Copyright (C) 2008-2009 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "keywords.h"
#include "pedefs.h"
#include "pofflib.h"
#include "perr.h"
#include "pexec.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Definitions
****************************************************************************/
/****************************************************************************
* Private Constant Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
FAR struct pexec_s *pload(const char *filename, paddr_t varsize, paddr_t strsize)
{
struct pexec_attr_s attr;
struct pexec_s *st;
poffHandle_t phandle;
FILE *exe;
uint16_t err;
uint8_t ftype;
uint8_t farch;
/* Create a handle to contain the executable data */
phandle = poffCreateHandle();
if (phandle == NULL) fatal(eNOMEMORY);
/* Open the executable file */
if (!(exe = fopen(filename, "rb")))
{
dbg("ERROR: Error opening '%s': %d\n", filename, errno);
goto errout_with_handle;
}
/* Load the POFF file into memory */
err = poffReadFile(phandle, exe);
if (err != eNOERROR)
{
dbg("ERROR: Could not read %s: %d\n", filename, err);
goto errout_with_file;
}
/* Verify that the file is a pascal executable */
ftype = poffGetFileType(phandle);
if (ftype != FHT_EXEC)
{
dbg("ERROR: File is not a pascal executable: %d\n", ftype);
goto errout_with_file;
}
farch = poffGetArchitecture(phandle);
if (farch != FHA_PCODE_INSN16)
{
dbg("ERROR: File is not 16-bit pcode: %d\n", farch);
goto errout_with_file;
}
/* Initialize the attribute structure */
attr.varsize = varsize;
attr.strsize = strsize;
/* Extract the program entry point from the pascal executable */
attr.entry = poffGetEntryPoint(phandle);
/* Close the POFF file */
(void)fclose(exe);
/* Extract the program data from the POFF image */
attr.maxpc = poffExtractProgramData(phandle, &attr.ispace);
/* Extract the read-only data from the POFF image */
attr.rosize = poffExtractRoData(phandle, &attr.rodata);
/* Destroy the POFF image */
poffDestroyHandle(phandle);
/* Initialize the p-code interpreter */
st = pexec_init(&attr);
if (!st && attr.ispace)
{
/* Initialization failed, discard the allocated I-Space */
free(st->ispace);
}
/* Discard the allocated RO data in any event */
if (attr.rodata)
{
free(attr.rodata);
}
return st;
errout_with_file:
(void)fclose(exe);
errout_with_handle:
poffDestroyHandle(phandle);
return NULL;
}
