forked from Archive/PX4-Autopilot
298 lines
8.2 KiB
C
298 lines
8.2 KiB
C
/************************************************************************************
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* configs/ea3131/tools/lpchdr.c
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*
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* Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "lpchdr.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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#define IO_BUF_SIZE 1024
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#define HDR_SIZE 0x80
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#define HDR_CRC_SIZE 0x6c
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/************************************************************************************
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* Private Data
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************************************************************************************/
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static const char *g_infile;
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static const char *g_outfile;
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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static void show_usage(const char *progname, int exitcode)
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{
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fprintf(stderr, "%s -o <outfile> <infile>\n", progname);
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exit(exitcode);
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}
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static void parse_args(int argc, char **argv)
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{
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int ch;
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while ((ch = getopt(argc, argv, ":o:")) >= 0)
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{
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switch (ch)
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{
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case 'o':
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g_outfile = optarg;
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break;
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case ':':
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fprintf(stderr, "Missing option argumen\n");
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show_usage(argv[0], 1);
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case '?':
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default:
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fprintf(stderr, "Unrecognized option\n");
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show_usage(argv[0], 1);
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}
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}
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if (optind >= argc)
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{
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fprintf(stderr, "Missing binary input file name\n");
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show_usage(argv[0], 1);
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}
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g_infile = argv[optind];
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optind++;
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if (optind < argc)
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{
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fprintf(stderr, "Garbage at the end of the command line\n");
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show_usage(argv[0], 1);
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}
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}
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static inline uint32_t infilecrc32(int infd, size_t len, size_t padlen)
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{
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off_t offset;
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uint8_t buffer[IO_BUF_SIZE];
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ssize_t nbytes;
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size_t bytesread;
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uint32_t crc;
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offset = lseek(infd, 0, SEEK_SET);
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if (offset == (off_t)-1)
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{
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fprintf(stderr, "lseek failed: %s\n", strerror(errno));
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exit(4);
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}
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crc = 0;
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for (bytesread = 0; bytesread < len; bytesread += nbytes)
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{
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nbytes = read(infd, buffer, IO_BUF_SIZE);
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if (nbytes < 0)
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{
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fprintf(stderr, "read failed: %s\n", strerror(errno));
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exit(4);
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}
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else if (nbytes == 0)
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{
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fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
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exit(4);
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}
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else
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{
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crc = crc32part(buffer, nbytes, crc);
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}
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}
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/* Add the zero-padding at the end of the binary in the CRC */
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memset(buffer, 0, IO_BUF_SIZE);
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return crc32part(buffer, padlen, crc);
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}
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static inline void writefile(int infd, int outfd, size_t len, size_t padlen)
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{
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off_t offset;
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uint8_t buffer[IO_BUF_SIZE];
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ssize_t nbytesread;
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ssize_t nbyteswritten;
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size_t totalread;
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offset = lseek(infd, 0, SEEK_SET);
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if (offset == (off_t)-1)
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{
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fprintf(stderr, "lseek failed: %s\n", strerror(errno));
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exit(4);
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}
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for (totalread = 0; totalread < len; totalread += nbytesread)
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{
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nbytesread = read(infd, buffer, IO_BUF_SIZE);
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if (nbytesread < 0)
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{
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fprintf(stderr, "read failed: %s\n", strerror(errno));
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exit(4);
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}
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else if (nbytesread == 0)
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{
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fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
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exit(4);
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}
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else
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{
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nbyteswritten = write(outfd, buffer, nbytesread);
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if (nbyteswritten < 0)
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{
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fprintf(stderr, "write failed: %s\n", strerror(errno));
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exit(4);
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}
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else if (nbyteswritten != nbytesread)
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{
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fprintf(stderr, "Short writes not handled\n");
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exit(4);
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}
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}
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}
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/* Write the zero-padding at the end of the binary */
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memset(buffer, 0, IO_BUF_SIZE);
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nbyteswritten = write(outfd, buffer, padlen);
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if (nbyteswritten < 0)
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{
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fprintf(stderr, "write failed: %s\n", strerror(errno));
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exit(4);
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}
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else if (nbyteswritten != padlen)
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{
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fprintf(stderr, "Short writes not handled\n");
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exit(4);
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}
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}
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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int main(int argc, char **argv, char **envp)
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{
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struct lpc31_header_s g_hdr;
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struct stat buf;
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ssize_t nbytes;
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size_t padlen;
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int infd;
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int outfd;
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int ret;
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/* Parse arguments */
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parse_args(argc, argv);
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/* Open files */
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infd = open(g_infile, O_RDONLY);
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if (infd < 0)
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{
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fprintf(stderr, "Failed to open %s for reading: %s\n", g_infile, strerror(errno));
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exit(2);
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}
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outfd = open(g_outfile, O_WRONLY|O_CREAT|O_TRUNC, 0644);
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if (outfd < 0)
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{
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fprintf(stderr, "Failed to open %s for writing: %s\n", g_outfile, strerror(errno));
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exit(2);
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}
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/* Get the size of the binary file */
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ret = fstat(infd, &buf);
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if (ret < 0)
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{
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fprintf(stderr, "stat of %s failed: %s\n", g_infile, strerror(errno));
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exit(3);
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}
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/* Initialize the header */
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memset(&g_hdr, 0, sizeof(struct lpc31_header_s));
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g_hdr.vector = 0xea00001e; /* b 0x11029080 */
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g_hdr.magic = 0x41676d69;
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#if 1 /* CRC doesn't seem to be functional */
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g_hdr.imageType = 0x0000000a;
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#else
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g_hdr.imageType = 0x0000000b;
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#endif
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g_hdr.imageLength = (buf.st_size + sizeof(struct lpc31_header_s) + 511) & ~0x1ff;
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/* This is how much we must pad at the end of the binary image. */
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padlen = g_hdr.imageLength - buf.st_size;
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/* Calculate CRCs */
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g_hdr.execution_crc32 = infilecrc32(infd, buf.st_size, padlen);
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g_hdr.header_crc32 = crc32((const uint8_t*)&g_hdr, HDR_CRC_SIZE);
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/* Write the header */
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nbytes = write(outfd, &g_hdr, HDR_SIZE);
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if (nbytes != 0x80)
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{
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fprintf(stderr, "write of header to of %s failed: %s\n", g_outfile, strerror(errno));
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exit(4);
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}
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/* Copy the input file to the output */
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writefile(infd, outfd, buf.st_size, padlen);
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close(infd);
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close(outfd);
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return 0;
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}
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