summaryrefslogtreecommitdiff
path: root/flash/extract/extract.c
diff options
context:
space:
mode:
Diffstat (limited to 'flash/extract/extract.c')
-rw-r--r--flash/extract/extract.c147
1 files changed, 0 insertions, 147 deletions
diff --git a/flash/extract/extract.c b/flash/extract/extract.c
deleted file mode 100644
index 2389f9290e..0000000000
--- a/flash/extract/extract.c
+++ /dev/null
@@ -1,147 +0,0 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2003 by Jörg Hohensohn
11 *
12 * Tool to extract the scrambled image out of an Archos flash ROM dump
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
18 *
19 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
20 * KIND, either express or implied.
21 *
22 ****************************************************************************/
23
24#include <stdio.h>
25#include <stdlib.h>
26#include <inttypes.h>
27
28#define UINT8 unsigned char
29#define UINT16 unsigned short
30#define UINT32 unsigned long
31
32#define IMAGE_HEADER 0x6000 // a 32 byte header in front of the software image
33#define IMAGE_START 0x6020 // software image position in Flash
34
35
36// place a 32 bit value into memory, big endian
37void Write32(UINT8* pByte, UINT32 value)
38{
39 pByte[0] = (UINT8)(value >> 24);
40 pByte[1] = (UINT8)(value >> 16);
41 pByte[2] = (UINT8)(value >> 8);
42 pByte[3] = (UINT8)(value);
43}
44
45
46// read a 32 bit value from memory, big endian
47UINT32 Read32(UINT8* pByte)
48{
49 UINT32 value = 0;
50
51 value |= (UINT32)pByte[0] << 24;
52 value |= (UINT32)pByte[1] << 16;
53 value |= (UINT32)pByte[2] << 8;
54 value |= (UINT32)pByte[3];
55
56 return value;
57}
58
59
60// entry point
61int main(int argc, char* argv[])
62{
63 FILE* pInFile;
64 FILE* pOutFile;
65 UINT8 aHeader[6];
66 UINT8 aImage[256*1024];
67 UINT32 i;
68 UINT32 uiSize, uiStart;
69 UINT16 usChecksum = 0;
70
71 if (argc < 2)
72 {
73 printf("Extract the software image out of an original Archos Flash ROM dump.\n");
74 printf("Result is a scrambled file, use the descramble tool to get the binary,\n");
75 printf(" always without the -fm option, even if processing an FM software.\n\n");
76 printf("Usage: extract <flash dump file> <output file>\n");
77 printf("Example: extract internal_rom_2000000-203FFFF.bin archos.ajz\n");
78 exit(0);
79 }
80
81 pInFile = fopen(argv[1], "rb");
82 if (pInFile == NULL)
83 {
84 printf("Error opening input file %s\n", argv[1]);
85 exit(1);
86 }
87
88 if (fread(aImage, 1, sizeof(aImage), pInFile) != sizeof(aImage))
89 {
90 printf("Error reading input file %s, must be 256kB in size.\n", argv[1]);
91 fclose(pInFile);
92 exit(2);
93 }
94 fclose(pInFile);
95
96 // find out about the type
97 uiStart = Read32(aImage + 8);
98 uiSize = Read32(aImage + 12); // booted ROM image
99 if (uiStart == 0x02000100 && uiSize > 20000)
100 { // Player has no loader, starts directly with the image
101 uiStart = 0x0100;
102 }
103 else
104 { // Recorder / FM / V2 Recorder
105 uiStart = IMAGE_START;
106 uiSize = Read32(aImage + IMAGE_HEADER + 4); // size record of header
107 }
108
109 // sanity check
110 if (uiSize > sizeof(aImage) - uiStart || uiSize < 40000)
111 {
112 printf("Error: Impossible image size %d bytes.\n", uiSize);
113 exit(3);
114 }
115
116 // generate checksum
117 for (i=0; i<uiSize; i++)
118 {
119 UINT8 byte;
120 byte = aImage[uiStart + i];
121 byte = ~((byte >> 1) | ((byte << 7) & 0x80)); /* poor man's ROR */
122 usChecksum += byte;
123 }
124
125 // make header
126 Write32(aHeader + 2, usChecksum); // checksum in 5th and 6th byte
127 Write32(aHeader, uiSize); // size in first 4 bytes
128
129 pOutFile = fopen(argv[2], "wb");
130 if (pOutFile == NULL)
131 {
132 printf("Error opening output file %s\n", argv[2]);
133 exit(4);
134 }
135
136 if (fwrite(aHeader, 1, sizeof(aHeader), pOutFile) != sizeof(aHeader)
137 || fwrite(aImage + uiStart, 1, uiSize, pOutFile) != uiSize)
138 {
139 printf("Write error\n");
140 fclose(pOutFile);
141 exit(5);
142 }
143
144 fclose(pOutFile);
145
146 return 0;
147}