/* * uimage_padhdr.c : add zero paddings after the tail of uimage header * * Copyright (C) 2019 NOGUCHI Hiroshi * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License, * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include /* from u-boot/include/image.h */ #define IH_MAGIC 0x27051956 /* Image Magic Number */ #define IH_NMLEN 32 /* Image Name Length */ /* * Legacy format image header, * all data in network byte order (aka natural aka bigendian). */ typedef struct image_header { uint32_t ih_magic; /* Image Header Magic Number */ uint32_t ih_hcrc; /* Image Header CRC Checksum */ uint32_t ih_time; /* Image Creation Timestamp */ uint32_t ih_size; /* Image Data Size */ uint32_t ih_load; /* Data Load Address */ uint32_t ih_ep; /* Entry Point Address */ uint32_t ih_dcrc; /* Image Data CRC Checksum */ uint8_t ih_os; /* Operating System */ uint8_t ih_arch; /* CPU architecture */ uint8_t ih_type; /* Image Type */ uint8_t ih_comp; /* Compression Type */ uint8_t ih_name[IH_NMLEN]; /* Image Name */ } image_header_t; /* default padding size */ #define IH_PAD_BYTES (32) static void usage(char *prog) { fprintf(stderr, "%s -i -o [-l ]\n", prog); } int main(int argc, char *argv[]) { struct stat statbuf; u_int8_t *filebuf; int ifd; int ofd; ssize_t rsz; u_int32_t crc_recalc; image_header_t *imgh; int opt; char *infname = NULL; char *outfname = NULL; int padsz = IH_PAD_BYTES; int ltmp; while ((opt = getopt(argc, argv, "i:o:l:")) != -1) { switch (opt) { case 'i': infname = optarg; break; case 'o': outfname = optarg; break; case 'l': ltmp = strtol(optarg, NULL, 0); if (ltmp > 0) padsz = ltmp; break; default: break; } } if (!infname || !outfname) { usage(argv[0]); exit(1); } ifd = open(infname, O_RDONLY); if (ifd < 0) { fprintf(stderr, "could not open input file. (errno = %d)\n", errno); exit(1); } ofd = open(outfname, O_WRONLY | O_CREAT, 0644); if (ofd < 0) { fprintf(stderr, "could not open output file. (errno = %d)\n", errno); exit(1); } if (fstat(ifd, &statbuf) < 0) { fprintf(stderr, "could not fstat input file. (errno = %d)\n", errno); exit(1); } filebuf = malloc(statbuf.st_size + padsz); if (!filebuf) { fprintf(stderr, "buffer allocation failed\n"); exit(1); } rsz = read(ifd, filebuf, sizeof(*imgh)); if (rsz != sizeof(*imgh)) { fprintf(stderr, "could not read input file (errno = %d).\n", errno); exit(1); } memset(&(filebuf[sizeof(*imgh)]), 0, padsz); rsz = read(ifd, &(filebuf[sizeof(*imgh) + padsz]), statbuf.st_size - sizeof(*imgh)); if (rsz != (int32_t)(statbuf.st_size - sizeof(*imgh))) { fprintf(stderr, "could not read input file (errno = %d).\n", errno); exit(1); } imgh = (image_header_t *)filebuf; imgh->ih_hcrc = 0; crc_recalc = crc32(0, filebuf, sizeof(*imgh) + padsz); imgh->ih_hcrc = htonl(crc_recalc); rsz = write(ofd, filebuf, statbuf.st_size + padsz); if (rsz != (int32_t)statbuf.st_size + padsz) { fprintf(stderr, "could not write output file (errnor = %d).\n", errno); exit(1); } return 0; } ='#n4'>4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200