gzboot.c revision 1.5.2.3
1 1.5.2.3 nathanw /* $NetBSD: gzboot.c,v 1.5.2.3 2002/06/20 03:38:35 nathanw Exp $ */ 2 1.5.2.2 nathanw 3 1.5.2.2 nathanw /* 4 1.5.2.2 nathanw * Copyright (c) 2002 Wasabi Systems, Inc. 5 1.5.2.2 nathanw * All rights reserved. 6 1.5.2.2 nathanw * 7 1.5.2.2 nathanw * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 1.5.2.2 nathanw * 9 1.5.2.2 nathanw * Redistribution and use in source and binary forms, with or without 10 1.5.2.2 nathanw * modification, are permitted provided that the following conditions 11 1.5.2.2 nathanw * are met: 12 1.5.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 13 1.5.2.2 nathanw * notice, this list of conditions and the following disclaimer. 14 1.5.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 15 1.5.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 16 1.5.2.2 nathanw * documentation and/or other materials provided with the distribution. 17 1.5.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 18 1.5.2.2 nathanw * must display the following acknowledgement: 19 1.5.2.2 nathanw * This product includes software developed for the NetBSD Project by 20 1.5.2.2 nathanw * Wasabi Systems, Inc. 21 1.5.2.2 nathanw * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 1.5.2.2 nathanw * or promote products derived from this software without specific prior 23 1.5.2.2 nathanw * written permission. 24 1.5.2.2 nathanw * 25 1.5.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 1.5.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 1.5.2.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 1.5.2.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 1.5.2.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 1.5.2.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 1.5.2.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 1.5.2.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 1.5.2.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 1.5.2.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 1.5.2.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 36 1.5.2.2 nathanw */ 37 1.5.2.2 nathanw 38 1.5.2.2 nathanw /* 39 1.5.2.2 nathanw * The Gzip header parser and libz interface glue are derived from 40 1.5.2.2 nathanw * sys/lib/libsa/cread.c, which carries the following notice: 41 1.5.2.2 nathanw * 42 1.5.2.2 nathanw * Copyright (c) 1996 43 1.5.2.2 nathanw * Matthias Drochner. All rights reserved. 44 1.5.2.2 nathanw * 45 1.5.2.2 nathanw * Redistribution and use in source and binary forms, with or without 46 1.5.2.2 nathanw * modification, are permitted provided that the following conditions 47 1.5.2.2 nathanw * are met: 48 1.5.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 49 1.5.2.2 nathanw * notice, this list of conditions and the following disclaimer. 50 1.5.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 51 1.5.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 52 1.5.2.2 nathanw * documentation and/or other materials provided with the distribution. 53 1.5.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 54 1.5.2.2 nathanw * must display the following acknowledgement: 55 1.5.2.2 nathanw * This product includes software developed for the NetBSD Project 56 1.5.2.2 nathanw * by Matthias Drochner. 57 1.5.2.2 nathanw * 4. The name of the author may not be used to endorse or promote products 58 1.5.2.2 nathanw * derived from this software without specific prior written permission. 59 1.5.2.2 nathanw * 60 1.5.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 61 1.5.2.2 nathanw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 62 1.5.2.2 nathanw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 1.5.2.2 nathanw * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 64 1.5.2.2 nathanw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 65 1.5.2.2 nathanw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 66 1.5.2.2 nathanw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 67 1.5.2.2 nathanw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 68 1.5.2.2 nathanw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 69 1.5.2.2 nathanw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 70 1.5.2.2 nathanw */ 71 1.5.2.2 nathanw 72 1.5.2.2 nathanw #include <sys/param.h> 73 1.5.2.2 nathanw #include <lib/libsa/stand.h> 74 1.5.2.2 nathanw #include <lib/libkern/libkern.h> 75 1.5.2.2 nathanw #include <lib/libz/zlib.h> 76 1.5.2.2 nathanw 77 1.5.2.2 nathanw #include "board.h" 78 1.5.2.2 nathanw #include "gzboot.h" 79 1.5.2.2 nathanw 80 1.5.2.2 nathanw /* zlib glue defns */ 81 1.5.2.2 nathanw 82 1.5.2.2 nathanw #define EOF (-1) /* needed by compression code */ 83 1.5.2.2 nathanw 84 1.5.2.2 nathanw #define Z_BUFSIZE 1024 85 1.5.2.2 nathanw 86 1.5.2.2 nathanw static const int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */ 87 1.5.2.2 nathanw 88 1.5.2.2 nathanw /* gzip flag byte */ 89 1.5.2.2 nathanw #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ 90 1.5.2.2 nathanw #define HEAD_CRC 0x02 /* bit 1 set: header CRC present */ 91 1.5.2.2 nathanw #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ 92 1.5.2.2 nathanw #define ORIG_NAME 0x08 /* bit 3 set: original file name present */ 93 1.5.2.2 nathanw #define COMMENT 0x10 /* bit 4 set: file comment present */ 94 1.5.2.2 nathanw #define RESERVED 0xe0 /* bits 5..7: reserved */ 95 1.5.2.2 nathanw 96 1.5.2.2 nathanw struct state { 97 1.5.2.2 nathanw z_stream stream; 98 1.5.2.2 nathanw int z_err; /* error code for last stream operation */ 99 1.5.2.2 nathanw int z_eof; /* set of end of input file */ 100 1.5.2.2 nathanw const unsigned char *srcbuf;/* source buffer */ 101 1.5.2.2 nathanw size_t srcoff; /* source buffer offset */ 102 1.5.2.2 nathanw size_t srcsize;/* size of source buffer */ 103 1.5.2.2 nathanw unsigned char *inbuf; /* input buffer */ 104 1.5.2.2 nathanw uint32_t crc; /* crc32 of uncompressed data */ 105 1.5.2.2 nathanw int spinny; /* twiddle every N reads */ 106 1.5.2.2 nathanw }; 107 1.5.2.2 nathanw 108 1.5.2.2 nathanw static uint32_t get_u8(struct state *); 109 1.5.2.2 nathanw static uint32_t get_u32(struct state *); 110 1.5.2.2 nathanw static int check_header(struct state *); 111 1.5.2.2 nathanw 112 1.5.2.2 nathanw /* XXX - find a suitable header for these: */ 113 1.5.2.2 nathanw void zmemcpy(unsigned char *, unsigned char *, unsigned int); 114 1.5.2.2 nathanw 115 1.5.2.2 nathanw /* end zlib glue defns */ 116 1.5.2.2 nathanw 117 1.5.2.2 nathanw void main(void); 118 1.5.2.2 nathanw void gzcopy(void *, const void *, size_t); 119 1.5.2.2 nathanw 120 1.5.2.2 nathanw void 121 1.5.2.2 nathanw main(void) 122 1.5.2.2 nathanw { 123 1.5.2.2 nathanw extern char bootprog_name[], bootprog_rev[], 124 1.5.2.2 nathanw bootprog_maker[], bootprog_date[]; 125 1.5.2.2 nathanw void (*loadaddr)(void) = (void *) md_root_loadaddr; 126 1.5.2.2 nathanw 127 1.5.2.2 nathanw cons_init(); 128 1.5.2.2 nathanw 129 1.5.2.2 nathanw printf("\n"); 130 1.5.2.2 nathanw printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev); 131 1.5.2.2 nathanw printf(">> (%s, %s)\n", bootprog_maker, bootprog_date); 132 1.5.2.2 nathanw 133 1.5.2.3 nathanw board_init(); 134 1.5.2.2 nathanw 135 1.5.2.2 nathanw printf(">> Load address: 0x%x\n", md_root_loadaddr); 136 1.5.2.2 nathanw printf(">> Image size: %u\n", md_root_size); 137 1.5.2.2 nathanw 138 1.5.2.2 nathanw printf("Uncompressing image..."); 139 1.5.2.2 nathanw gzcopy((void *) loadaddr, md_root_image, md_root_size); 140 1.5.2.2 nathanw printf("done.\n"); 141 1.5.2.2 nathanw 142 1.5.2.2 nathanw printf("Jumping to image @ 0x%x...\n", md_root_loadaddr); 143 1.5.2.3 nathanw 144 1.5.2.3 nathanw board_fini(); 145 1.5.2.3 nathanw 146 1.5.2.2 nathanw (*loadaddr)(); 147 1.5.2.2 nathanw 148 1.5.2.2 nathanw _rtt(); 149 1.5.2.2 nathanw } 150 1.5.2.2 nathanw 151 1.5.2.2 nathanw void abort(void); 152 1.5.2.2 nathanw void 153 1.5.2.2 nathanw abort(void) 154 1.5.2.2 nathanw { 155 1.5.2.2 nathanw 156 1.5.2.2 nathanw for (;;) ; 157 1.5.2.2 nathanw } 158 1.5.2.2 nathanw 159 1.5.2.2 nathanw __dead void 160 1.5.2.2 nathanw _rtt(void) 161 1.5.2.2 nathanw { 162 1.5.2.2 nathanw 163 1.5.2.2 nathanw for (;;) ; 164 1.5.2.2 nathanw } 165 1.5.2.2 nathanw 166 1.5.2.2 nathanw /* internal utility routines */ 167 1.5.2.2 nathanw 168 1.5.2.2 nathanw static ssize_t 169 1.5.2.2 nathanw readbuf(struct state *s, void *buf, size_t len) 170 1.5.2.2 nathanw { 171 1.5.2.2 nathanw 172 1.5.2.2 nathanw if (len > (s->srcsize - s->srcoff)) 173 1.5.2.2 nathanw len = s->srcsize - s->srcoff; 174 1.5.2.2 nathanw 175 1.5.2.2 nathanw if ((s->spinny++ & 7) == 0) 176 1.5.2.2 nathanw twiddle(); 177 1.5.2.2 nathanw bcopy(s->srcbuf + s->srcoff, buf, len); 178 1.5.2.2 nathanw s->srcoff += len; 179 1.5.2.2 nathanw 180 1.5.2.2 nathanw return (len); 181 1.5.2.2 nathanw } 182 1.5.2.2 nathanw 183 1.5.2.2 nathanw static ssize_t 184 1.5.2.2 nathanw readgz(struct state *s, void *buf, size_t len) 185 1.5.2.2 nathanw { 186 1.5.2.2 nathanw unsigned char *start = buf; /* start for CRC computation */ 187 1.5.2.2 nathanw 188 1.5.2.2 nathanw if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) 189 1.5.2.2 nathanw return (-1); 190 1.5.2.2 nathanw if (s->z_err == Z_STREAM_END) 191 1.5.2.2 nathanw return (0); /* EOF */ 192 1.5.2.2 nathanw 193 1.5.2.2 nathanw s->stream.next_out = buf; 194 1.5.2.2 nathanw s->stream.avail_out = len; 195 1.5.2.2 nathanw 196 1.5.2.2 nathanw while (s->stream.avail_out != 0) { 197 1.5.2.2 nathanw if (s->stream.avail_in == 0 && s->z_eof == 0) { 198 1.5.2.2 nathanw ssize_t got; 199 1.5.2.2 nathanw got = readbuf(s, s->inbuf, Z_BUFSIZE); 200 1.5.2.2 nathanw if (got <= 0) 201 1.5.2.2 nathanw s->z_eof = 1; 202 1.5.2.2 nathanw s->stream.avail_in = got; 203 1.5.2.2 nathanw s->stream.next_in = s->inbuf; 204 1.5.2.2 nathanw } 205 1.5.2.2 nathanw 206 1.5.2.2 nathanw s->z_err = inflate(&s->stream, Z_NO_FLUSH); 207 1.5.2.2 nathanw 208 1.5.2.2 nathanw if (s->z_err == Z_STREAM_END) { 209 1.5.2.2 nathanw /* Check CRC and original size */ 210 1.5.2.2 nathanw s->crc = crc32(s->crc, start, (unsigned int) 211 1.5.2.2 nathanw (s->stream.next_out - start)); 212 1.5.2.2 nathanw start = s->stream.next_out; 213 1.5.2.2 nathanw 214 1.5.2.2 nathanw if (get_u32(s) != s->crc) { 215 1.5.2.2 nathanw printf("FATAL: CRC checksum mismatch\n"); 216 1.5.2.2 nathanw s->z_err = Z_DATA_ERROR; 217 1.5.2.2 nathanw } 218 1.5.2.2 nathanw if (get_u32(s) != s->stream.total_out) { 219 1.5.2.2 nathanw printf("FATAL: total output mismatch\n"); 220 1.5.2.2 nathanw s->z_err = Z_DATA_ERROR; 221 1.5.2.2 nathanw } 222 1.5.2.2 nathanw s->z_eof = 1; 223 1.5.2.2 nathanw } 224 1.5.2.2 nathanw if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) { 225 1.5.2.2 nathanw printf("FATAL: error %d from zlib\n", 226 1.5.2.2 nathanw s->z_err); 227 1.5.2.2 nathanw return (-1); 228 1.5.2.2 nathanw } 229 1.5.2.2 nathanw if (s->z_err != Z_OK || s->z_eof) 230 1.5.2.2 nathanw break; 231 1.5.2.2 nathanw } 232 1.5.2.2 nathanw 233 1.5.2.2 nathanw s->crc = crc32(s->crc, start, 234 1.5.2.2 nathanw (unsigned int)(s->stream.next_out - start)); 235 1.5.2.2 nathanw 236 1.5.2.2 nathanw return ((ssize_t) (len - s->stream.avail_out)); 237 1.5.2.2 nathanw } 238 1.5.2.2 nathanw 239 1.5.2.2 nathanw /* util routines for zlib */ 240 1.5.2.2 nathanw 241 1.5.2.2 nathanw void 242 1.5.2.2 nathanw zmemcpy(unsigned char *dst, unsigned char *src, unsigned int len) 243 1.5.2.2 nathanw { 244 1.5.2.2 nathanw 245 1.5.2.2 nathanw bcopy(src, dst, len); 246 1.5.2.2 nathanw } 247 1.5.2.2 nathanw 248 1.5.2.2 nathanw /* gzip utility routines */ 249 1.5.2.2 nathanw 250 1.5.2.2 nathanw static uint32_t 251 1.5.2.2 nathanw get_u8(struct state *s) 252 1.5.2.2 nathanw { 253 1.5.2.2 nathanw 254 1.5.2.2 nathanw if (s->z_eof) 255 1.5.2.2 nathanw return (EOF); 256 1.5.2.2 nathanw 257 1.5.2.2 nathanw if (s->stream.avail_in == 0) { 258 1.5.2.2 nathanw ssize_t got; 259 1.5.2.2 nathanw 260 1.5.2.2 nathanw got = readbuf(s, s->inbuf, Z_BUFSIZE); 261 1.5.2.2 nathanw if (got <= 0) { 262 1.5.2.2 nathanw s->z_eof = 1; 263 1.5.2.2 nathanw return (EOF); 264 1.5.2.2 nathanw } 265 1.5.2.2 nathanw s->stream.avail_in = got; 266 1.5.2.2 nathanw s->stream.next_in = s->inbuf; 267 1.5.2.2 nathanw } 268 1.5.2.2 nathanw s->stream.avail_in--; 269 1.5.2.2 nathanw return (*(s->stream.next_in)++); 270 1.5.2.2 nathanw } 271 1.5.2.2 nathanw 272 1.5.2.2 nathanw static uint32_t 273 1.5.2.2 nathanw get_u32(struct state *s) 274 1.5.2.2 nathanw { 275 1.5.2.2 nathanw uint32_t x, c; 276 1.5.2.2 nathanw 277 1.5.2.2 nathanw x = get_u8(s); 278 1.5.2.2 nathanw x |= get_u8(s) << 8; 279 1.5.2.2 nathanw x |= get_u8(s) << 16; 280 1.5.2.2 nathanw c = get_u8(s); 281 1.5.2.2 nathanw if (c == EOF) 282 1.5.2.2 nathanw s->z_err = Z_DATA_ERROR; 283 1.5.2.2 nathanw x |= c << 24; 284 1.5.2.2 nathanw return (x); 285 1.5.2.2 nathanw } 286 1.5.2.2 nathanw 287 1.5.2.2 nathanw static int 288 1.5.2.2 nathanw check_header(struct state *s) 289 1.5.2.2 nathanw { 290 1.5.2.2 nathanw int method; /* method byte */ 291 1.5.2.2 nathanw int flags; /* flags byte */ 292 1.5.2.2 nathanw unsigned int len; 293 1.5.2.2 nathanw int c; 294 1.5.2.2 nathanw 295 1.5.2.2 nathanw /* Check the gzip magic header */ 296 1.5.2.2 nathanw for (len = 0; len < 2; len++) { 297 1.5.2.2 nathanw c = get_u8(s); 298 1.5.2.2 nathanw if (c == gz_magic[len]) 299 1.5.2.2 nathanw continue; 300 1.5.2.2 nathanw printf("FATAL: not a Gzip'd image\n"); 301 1.5.2.2 nathanw return (1); 302 1.5.2.2 nathanw } 303 1.5.2.2 nathanw 304 1.5.2.2 nathanw method = get_u8(s); 305 1.5.2.2 nathanw flags = get_u8(s); 306 1.5.2.2 nathanw if (method != Z_DEFLATED || (flags & RESERVED) != 0) { 307 1.5.2.2 nathanw printf("FATAL: invalid Gzip header\n"); 308 1.5.2.2 nathanw return (1); 309 1.5.2.2 nathanw } 310 1.5.2.2 nathanw 311 1.5.2.2 nathanw /* Discard time, xflags, and OS code: */ 312 1.5.2.2 nathanw for (len = 0; len < 6; len++) 313 1.5.2.2 nathanw (void) get_u8(s); 314 1.5.2.2 nathanw 315 1.5.2.2 nathanw if (flags & EXTRA_FIELD) { 316 1.5.2.2 nathanw /* skip the extra field */ 317 1.5.2.2 nathanw len = get_u8(s); 318 1.5.2.2 nathanw len |= get_u8(s) << 8; 319 1.5.2.2 nathanw /* len is garbage if EOF, but the loop below will quit anyway */ 320 1.5.2.2 nathanw while (len-- && get_u8(s) != EOF) 321 1.5.2.2 nathanw /* loop */; 322 1.5.2.2 nathanw } 323 1.5.2.2 nathanw if (flags & ORIG_NAME) { 324 1.5.2.2 nathanw /* skip the original file name */ 325 1.5.2.2 nathanw while ((c = get_u8(s)) != 0 && c != EOF) 326 1.5.2.2 nathanw /* loop */; 327 1.5.2.2 nathanw } 328 1.5.2.2 nathanw if (flags & COMMENT) { 329 1.5.2.2 nathanw /* skip the file comment */ 330 1.5.2.2 nathanw while ((c = get_u8(s)) != 0 && c != EOF) 331 1.5.2.2 nathanw /* loop */; 332 1.5.2.2 nathanw } 333 1.5.2.2 nathanw if (flags & HEAD_CRC) { 334 1.5.2.2 nathanw /* skip header CRC */ 335 1.5.2.2 nathanw for (len = 0; len < 2; len++) 336 1.5.2.2 nathanw (void) get_u8(s); 337 1.5.2.2 nathanw } 338 1.5.2.2 nathanw 339 1.5.2.2 nathanw if (s->z_eof) { 340 1.5.2.2 nathanw printf("FATAL: end of image encountered parsing Gzip header\n"); 341 1.5.2.2 nathanw return (1); 342 1.5.2.2 nathanw } 343 1.5.2.2 nathanw 344 1.5.2.2 nathanw /* OK! */ 345 1.5.2.2 nathanw return (0); 346 1.5.2.2 nathanw } 347 1.5.2.2 nathanw 348 1.5.2.2 nathanw /* the actual gzcopy routine */ 349 1.5.2.2 nathanw 350 1.5.2.2 nathanw void 351 1.5.2.2 nathanw gzcopy(void *dst, const void *src, size_t srclen) 352 1.5.2.2 nathanw { 353 1.5.2.2 nathanw struct state state; 354 1.5.2.2 nathanw unsigned char *cp = dst; 355 1.5.2.2 nathanw ssize_t len; 356 1.5.2.2 nathanw 357 1.5.2.2 nathanw bzero(&state, sizeof(state)); 358 1.5.2.2 nathanw 359 1.5.2.2 nathanw state.z_err = Z_OK; 360 1.5.2.2 nathanw state.srcbuf = src; 361 1.5.2.2 nathanw state.srcsize = srclen; 362 1.5.2.2 nathanw 363 1.5.2.2 nathanw if (inflateInit2(&state.stream, -15) != Z_OK) { 364 1.5.2.2 nathanw printf("FATAL: inflateInit2 failed\n"); 365 1.5.2.2 nathanw _rtt(); 366 1.5.2.2 nathanw } 367 1.5.2.2 nathanw 368 1.5.2.2 nathanw state.stream.next_in = state.inbuf = alloc(Z_BUFSIZE); 369 1.5.2.2 nathanw if (state.inbuf == NULL) { 370 1.5.2.2 nathanw inflateEnd(&state.stream); 371 1.5.2.2 nathanw printf("FATAL: unable to allocate Z buffer\n"); 372 1.5.2.2 nathanw _rtt(); 373 1.5.2.2 nathanw } 374 1.5.2.2 nathanw 375 1.5.2.2 nathanw /* Skip the Gzip header. */ 376 1.5.2.2 nathanw if (check_header(&state)) { 377 1.5.2.2 nathanw inflateEnd(&state.stream); 378 1.5.2.2 nathanw free(state.inbuf, Z_BUFSIZE); 379 1.5.2.2 nathanw _rtt(); 380 1.5.2.2 nathanw } 381 1.5.2.2 nathanw 382 1.5.2.2 nathanw /* Uncompress the image! */ 383 1.5.2.2 nathanw while ((len = readgz(&state, cp, Z_BUFSIZE)) > 0) 384 1.5.2.2 nathanw cp += len; 385 1.5.2.2 nathanw if (len == -1) 386 1.5.2.2 nathanw _rtt(); 387 1.5.2.2 nathanw 388 1.5.2.2 nathanw /* All done! */ 389 1.5.2.2 nathanw inflateEnd(&state.stream); 390 1.5.2.2 nathanw free(state.inbuf, Z_BUFSIZE); 391 1.5.2.2 nathanw } 392
Indexes created Fri Oct 31 11:10:07 GMT 2025