1 files changed, 140 insertions, 0 deletions

diff --git a/flash/extract/extract.c b/flash/extract/extract.c
new file mode 100644
index 0000000000..31e223a546
--- /dev/null
+++ b/flash/extract/extract.c
@@ -0,0 +1,140 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2003 by Jörg Hohensohn 
+ * 
+ * Tool to extract the scrambled image out of an Archos flash ROM dump
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <memory.h>
+
+#define UINT8 unsigned char
+#define UINT16 unsigned short
+#define UINT32 unsigned long
+
+#define IMAGE_HEADER 0x6000 // a 32 byte header in front of the software image
+#define IMAGE_START  0x6020     // software image position in Flash
+
+
+// place a 32 bit value into memory, big endian
+void Write32(UINT8* pByte, UINT32 value)
+{
+        pByte[0] = (UINT8)(value >> 24);        
+        pByte[1] = (UINT8)(value >> 16);        
+        pByte[2] = (UINT8)(value >> 8); 
+        pByte[3] = (UINT8)(value);      
+}
+
+
+// read a 32 bit value from memory, big endian
+UINT32 Read32(UINT8* pByte)
+{
+        UINT32 value = 0;
+
+        value |= (UINT32)pByte[0] << 24;
+        value |= (UINT32)pByte[1] << 16;
+        value |= (UINT32)pByte[2] << 8;
+        value |= (UINT32)pByte[3];
+
+        return value;
+}
+
+
+// entry point
+int main(int argc, char* argv[])
+{
+        FILE* pInFile;
+        FILE* pOutFile;
+        UINT8 aHeader[6];
+        UINT8 aImage[256*1024];
+        UINT32 i;
+        UINT32 uiSize, uiStart;
+        UINT16 usChecksum = 0;
+        
+        if (argc < 2)
+        {
+                printf("Extract the software image out of an original Archos Flash ROM dump.\n");
+                printf("Result is a scrambled file, use the descramble tool to get the binary,\n");
+                printf(" always without the -fm option, even if processing an FM software.\n\n");
+                printf("Usage: extract <flash dump file> <output file>\n");
+                printf("Example: extract internal_rom_2000000-203FFFF.bin archos.ajz\n");
+                exit(0);
+        }
+        
+        pInFile = fopen(argv[1], "rb");
+        if (pInFile == NULL)
+        {
+                printf("Error opening input file %s\n", argv[1]);
+                exit(1);
+        }
+
+        if (fread(aImage, 1, sizeof(aImage), pInFile) != sizeof(aImage))
+        {
+                printf("Error reading input file %s, must be 256kB in size.\n", argv[1]);
+                fclose(pInFile);
+                exit(2);
+        }
+        fclose(pInFile);
+
+        // find out about the type
+        uiStart = Read32(aImage + 8);
+        uiSize = Read32(aImage + 12); // booted ROM image
+        if (uiStart == 0x02000100 && uiSize > 20000)
+        {       // Player has no loader, starts directly with the image
+                uiStart = 0x0100;
+        }
+        else
+        {       // Recorder / FM / V2 Recorder
+                uiStart = IMAGE_START;
+                uiSize = Read32(aImage + IMAGE_HEADER + 4); // size record of header
+        }
+
+        // sanity check
+        if (uiSize > sizeof(aImage) - uiStart || uiSize < 40000)
+        {       
+                printf("Error: Impossible image size &d bytes.\n", uiSize);
+                exit(3);
+        }
+
+        // generate checksum
+        for (i=0; i<uiSize; i++)
+                usChecksum += aImage[uiStart + i];
+
+        // make header
+        Write32(aHeader + 2, usChecksum); // checksum in 5th and 6th byte
+        Write32(aHeader, uiSize); // size in first 4 bytes
+
+        pOutFile = fopen(argv[2], "wb");
+        if (pOutFile == NULL)
+        {
+                printf("Error opening output file %s\n", argv[2]);
+                exit(4);
+        }
+
+        if (fwrite(aHeader, 1, sizeof(aHeader), pOutFile) != sizeof(aHeader)
+         || fwrite(aImage + uiStart, 1, uiSize, pOutFile) != uiSize)
+        {
+                printf("Write error\n");
+                fclose(pOutFile);
+                exit(5);
+        }
+
+        fclose(pOutFile);
+
+        return 0;
+}
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