diff options
Diffstat (limited to 'utils/chinachippatcher/chinachip.c')
| -rw-r--r-- | utils/chinachippatcher/chinachip.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/utils/chinachippatcher/chinachip.c b/utils/chinachippatcher/chinachip.c new file mode 100644 index 0000000000..79b5acad66 --- /dev/null +++ b/utils/chinachippatcher/chinachip.c @@ -0,0 +1,258 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2009 by Maurus Cuelenaere + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include <stdio.h> +#include <stddef.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <time.h> +#include "chinachip.h" + +/* From http://www.rockbox.org/wiki/ChinaChip */ +struct header +{ + uint32_t signature; /* WADF */ + uint32_t unk; + int8_t timestamp[12]; /* 200805081100 */ + uint32_t size; + uint32_t checksum; + uint32_t unk2; + int8_t identifier[32]; /* Chinachip PMP firmware V1.0 */ +} __attribute__ ((packed)); + +static inline void int2le(unsigned char* addr, unsigned int val) +{ + addr[0] = val & 0xff; + addr[1] = (val >> 8) & 0xff; + addr[2] = (val >> 16) & 0xff; + addr[3] = (val >> 24) & 0xff; +} + +static inline unsigned int le2int(unsigned char* buf) +{ + return (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; +} + +static long int filesize(FILE* fd) +{ + long int len; + fseek(fd, 0, SEEK_END); + len = ftell(fd); + fseek(fd, 0, SEEK_SET); + return len; +} + +#define FCLOSE(fd) fclose(fd); fd = NULL; +#define CCPMPBIN_HEADER_SIZE (sizeof(uint32_t)*2 + sizeof(uint8_t) + 9) +#define TOTAL_SIZE (fsize + CCPMPBIN_HEADER_SIZE + bsize) +enum cc_error chinachip_patch(const char* firmware, const char* bootloader, + const char* output, const char* ccpmp_backup) +{ + char header_time[13]; + time_t cur_time; + struct tm* time_info; + unsigned char* buf = NULL; + FILE *fd = NULL, *bd = NULL, *od = NULL; + unsigned int ccpmp_size = 0, i, fsize, bsize; + signed int checksum = 0, ccpmp_pos; + int result = E_OK; + + fd = fopen(firmware, "rb"); + if(!fd) + { + fprintf(stderr, "[ERR] Can't open file %s!\n", firmware); + result = E_OPEN_FIRMWARE; + goto err; + } + bd = fopen(bootloader, "rb"); + if(!bd) + { + fprintf(stderr, "[ERR] Can't open file %s!\n", bootloader); + result = E_OPEN_BOOTLOADER; + goto err; + } + + bsize = filesize(bd); + fprintf(stderr, "[INFO] Bootloader size is %d bytes\n", bsize); + FCLOSE(bd); + + fsize = filesize(fd); + fprintf(stderr, "[INFO] Firmware size is %d bytes\n", fsize); + + buf = malloc(TOTAL_SIZE); + if(buf == NULL) + { + fprintf(stderr, "[ERR] Can't allocate %d bytes!\n", fsize); + result = E_MEMALLOC; + goto err; + } + memset(buf, 0, TOTAL_SIZE); + + fprintf(stderr, "[INFO] Reading %s into memory...\n", firmware); + if(fread(buf, fsize, 1, fd) != 1) + { + fprintf(stderr, "[ERR] Can't read file %s to memory!\n", firmware); + result = E_LOAD_FIRMWARE; + goto err; + } + FCLOSE(fd); + + if(memcmp(buf, "WADF", 4)) + { + fprintf(stderr, "[ERR] File %s isn't a valid ChinaChip firmware!\n", firmware); + result = E_INVALID_FILE; + goto err; + } + + ccpmp_pos = -1, i = 0x40; + do + { + int filenamesize = le2int(&buf[i]); + i += sizeof(uint32_t); + + if(!strncmp((char*) &buf[i], "ccpmp.bin", 9)) + { + ccpmp_pos = i; + ccpmp_size = le2int(&buf[i + sizeof(uint8_t) + filenamesize]); + } + else + i += filenamesize + le2int(&buf[i + sizeof(uint8_t) + filenamesize]) + + sizeof(uint32_t) + sizeof(uint8_t); + } while(ccpmp_pos < 0 && i < fsize); + + if(i >= fsize) + { + fprintf(stderr, "[ERR] Couldn't find ccpmp.bin in %s!\n", firmware); + result = E_NO_CCPMP; + goto err; + } + fprintf(stderr, "[INFO] Found ccpmp.bin at %d bytes\n", ccpmp_pos); + + if(ccpmp_backup) + { + int ccpmp_data_pos = ccpmp_pos + 9; + bd = fopen(ccpmp_backup, "wb"); + if(!bd) + { + fprintf(stderr, "[ERR] Can't open file %s!\n", ccpmp_backup); + result = E_OPEN_BACKUP; + goto err; + } + + fprintf(stderr, "[INFO] Writing %d bytes to %s...\n", ccpmp_size, ccpmp_backup); + if(fwrite(&buf[ccpmp_data_pos], ccpmp_size, 1, bd) != 1) + { + fprintf(stderr, "[ERR] Can't write to file %s!\n", ccpmp_backup); + result = E_WRITE_BACKUP; + goto err; + } + FCLOSE(bd); + } + + fprintf(stderr, "[INFO] Renaming it to ccpmp.old...\n"); + buf[ccpmp_pos + 6] = 'o'; + buf[ccpmp_pos + 7] = 'l'; + buf[ccpmp_pos + 8] = 'd'; + + bd = fopen(bootloader, "rb"); + if(!bd) + { + fprintf(stderr, "[ERR] Can't open file %s!\n", bootloader); + result = E_OPEN_BOOTLOADER; + goto err; + } + + /* Also include path size */ + ccpmp_pos -= sizeof(uint32_t); + + fprintf(stderr, "[INFO] Making place for ccpmp.bin...\n"); + memmove(&buf[ccpmp_pos + bsize + CCPMPBIN_HEADER_SIZE], + &buf[ccpmp_pos], fsize - ccpmp_pos); + + fprintf(stderr, "[INFO] Reading %s into memory...\n", bootloader); + if(fread(&buf[ccpmp_pos + CCPMPBIN_HEADER_SIZE], + bsize, 1, bd) != 1) + { + fprintf(stderr, "[ERR] Can't read file %s to memory!\n", bootloader); + result = E_LOAD_BOOTLOADER; + goto err; + } + FCLOSE(bd); + + fprintf(stderr, "[INFO] Adding header to %s...\n", bootloader); + int2le(&buf[ccpmp_pos ], 9); /* Pathname Size */ + memcpy(&buf[ccpmp_pos + 4 ], "ccpmp.bin", 9); /* Pathname */ + memset(&buf[ccpmp_pos + 4 + 9 ], 0x20, sizeof(uint8_t)); /* File Type */ + int2le(&buf[ccpmp_pos + 4 + 9 + 1], bsize); /* File Size */ + + time(&cur_time); + time_info = localtime(&cur_time); + if(time_info == NULL) + { + fprintf(stderr, "[ERR] Can't obtain current time!\n"); + result = E_GET_TIME; + goto err; + } + + snprintf(header_time, 13, "%04d%02d%02d%02d%02d", time_info->tm_year + 1900, + time_info->tm_mon, + time_info->tm_mday, + time_info->tm_hour, + time_info->tm_min); + + fprintf(stderr, "[INFO] Computing checksum...\n"); + for(i = sizeof(struct header); i < TOTAL_SIZE; i+=4) + checksum += le2int(&buf[i]); + + fprintf(stderr, "[INFO] Updating main header...\n"); + memcpy(&buf[offsetof(struct header, timestamp)], header_time, 12); + int2le(&buf[offsetof(struct header, size) ], TOTAL_SIZE); + int2le(&buf[offsetof(struct header, checksum) ], checksum); + + od = fopen(output, "wb"); + if(!od) + { + fprintf(stderr, "[ERR] Can't open file %s!\n", output); + result = E_OPEN_OUTFILE; + goto err; + } + + fprintf(stderr, "[INFO] Writing output to %s...\n", output); + if(fwrite(buf, TOTAL_SIZE, 1, od) != 1) + { + fprintf(stderr, "[ERR] Can't write to file %s!\n", output); + result = E_WRITE_OUTFILE; + goto err; + } + +err: + if(buf) + free(buf); + if(fd) + fclose(fd); + if(bd) + fclose(bd); + if(od) + fclose(od); + + return result; +} + |