/************************************************************************************
* configs/ea3131/tools/lpchdr.c
*
* Copyright (C) 2010-2011 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 <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include "lpchdr.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#define IO_BUF_SIZE 1024
#define HDR_SIZE 0x80
#define HDR_CRC_SIZE 0x6c
/************************************************************************************
* Private Data
************************************************************************************/
static const char *g_infile;
static const char *g_outfile;
/************************************************************************************
* Private Functions
************************************************************************************/
static void show_usage(const char *progname, int exitcode)
{
fprintf(stderr, "%s -o <outfile> <infile>\n", progname);
exit(exitcode);
}
static void parse_args(int argc, char **argv)
{
int ch;
while ((ch = getopt(argc, argv, ":o:")) >= 0)
{
switch (ch)
{
case 'o':
g_outfile = optarg;
break;
case ':':
fprintf(stderr, "Missing option argumen\n");
show_usage(argv[0], 1);
case '?':
default:
fprintf(stderr, "Unrecognized option\n");
show_usage(argv[0], 1);
}
}
if (optind >= argc)
{
fprintf(stderr, "Missing binary input file name\n");
show_usage(argv[0], 1);
}
g_infile = argv[optind];
optind++;
if (optind < argc)
{
fprintf(stderr, "Garbage at the end of the command line\n");
show_usage(argv[0], 1);
}
}
static inline uint32_t infilecrc32(int infd, size_t len, size_t padlen)
{
off_t offset;
uint8_t buffer[IO_BUF_SIZE];
ssize_t nbytes;
size_t bytesread;
uint32_t crc;
offset = lseek(infd, 0, SEEK_SET);
if (offset == (off_t)-1)
{
fprintf(stderr, "lseek failed: %s\n", strerror(errno));
exit(4);
}
crc = 0;
for (bytesread = 0; bytesread < len; bytesread += nbytes)
{
nbytes = read(infd, buffer, IO_BUF_SIZE);
if (nbytes < 0)
{
fprintf(stderr, "read failed: %s\n", strerror(errno));
exit(4);
}
else if (nbytes == 0)
{
fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
exit(4);
}
else
{
crc = crc32part(buffer, nbytes, crc);
}
}
/* Add the zero-padding at the end of the binary in the CRC */
memset(buffer, 0, IO_BUF_SIZE);
return crc32part(buffer, padlen, crc);
}
static inline void writefile(int infd, int outfd, size_t len, size_t padlen)
{
off_t offset;
uint8_t buffer[IO_BUF_SIZE];
ssize_t nbytesread;
ssize_t nbyteswritten;
size_t totalread;
offset = lseek(infd, 0, SEEK_SET);
if (offset == (off_t)-1)
{
fprintf(stderr, "lseek failed: %s\n", strerror(errno));
exit(4);
}
for (totalread = 0; totalread < len; totalread += nbytesread)
{
nbytesread = read(infd, buffer, IO_BUF_SIZE);
if (nbytesread < 0)
{
fprintf(stderr, "read failed: %s\n", strerror(errno));
exit(4);
}
else if (nbytesread == 0)
{
fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
exit(4);
}
else
{
nbyteswritten = write(outfd, buffer, nbytesread);
if (nbyteswritten < 0)
{
fprintf(stderr, "write failed: %s\n", strerror(errno));
exit(4);
}
else if (nbyteswritten != nbytesread)
{
fprintf(stderr, "Short writes not handled\n");
exit(4);
}
}
}
/* Write the zero-padding at the end of the binary */
memset(buffer, 0, IO_BUF_SIZE);
nbyteswritten = write(outfd, buffer, padlen);
if (nbyteswritten < 0)
{
fprintf(stderr, "write failed: %s\n", strerror(errno));
exit(4);
}
else if (nbyteswritten != padlen)
{
fprintf(stderr, "Short writes not handled\n");
exit(4);
}
}
/************************************************************************************
* Public Functions
************************************************************************************/
int main(int argc, char **argv, char **envp)
{
struct lpc31_header_s g_hdr;
struct stat buf;
ssize_t nbytes;
size_t padlen;
int infd;
int outfd;
int ret;
/* Parse arguments */
parse_args(argc, argv);
/* Open files */
infd = open(g_infile, O_RDONLY);
if (infd < 0)
{
fprintf(stderr, "Failed to open %s for reading: %s\n", g_infile, strerror(errno));
exit(2);
}
outfd = open(g_outfile, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (outfd < 0)
{
fprintf(stderr, "Failed to open %s for writing: %s\n", g_outfile, strerror(errno));
exit(2);
}
/* Get the size of the binary file */
ret = fstat(infd, &buf);
if (ret < 0)
{
fprintf(stderr, "stat of %s failed: %s\n", g_infile, strerror(errno));
exit(3);
}
/* Initialize the header */
memset(&g_hdr, 0, sizeof(struct lpc31_header_s));
g_hdr.vector = 0xea00001e; /* b 0x11029080 */
g_hdr.magic = 0x41676d69;
#if 1 /* CRC doesn't seem to be functional */
g_hdr.imageType = 0x0000000a;
#else
g_hdr.imageType = 0x0000000b;
#endif
g_hdr.imageLength = (buf.st_size + sizeof(struct lpc31_header_s) + 511) & ~0x1ff;
/* This is how much we must pad at the end of the binary image. */
padlen = g_hdr.imageLength - buf.st_size;
/* Calculate CRCs */
g_hdr.execution_crc32 = infilecrc32(infd, buf.st_size, padlen);
g_hdr.header_crc32 = crc32((const uint8_t*)&g_hdr, HDR_CRC_SIZE);
/* Write the header */
nbytes = write(outfd, &g_hdr, HDR_SIZE);
if (nbytes != 0x80)
{
fprintf(stderr, "write of header to of %s failed: %s\n", g_outfile, strerror(errno));
exit(4);
}
/* Copy the input file to the output */
writefile(infd, outfd, buf.st_size, padlen);
close(infd);
close(outfd);
return 0;
}
