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authorJörg Hohensohn <hohensoh@rockbox.org>2003-11-30 11:37:43 +0000
committerJörg Hohensohn <hohensoh@rockbox.org>2003-11-30 11:37:43 +0000
commit6a4e4c87c24455e18bbd77565cb3e993ee350618 (patch)
tree6f2ceac4da97aa63ff8deef939bd3cc2d56d3466 /flash/extract/extract.c
parent014c4fa1f8d56850cfd504a90221c293e4a158f6 (diff)
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source code for all my flash stuff, now finally in cvs
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4083 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'flash/extract/extract.c')
-rw-r--r--flash/extract/extract.c140
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 Jrg 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;
+} \ No newline at end of file