- add verify_image command

- add support for gdb qCRC packet (compare-sections command)

git-svn-id: svn://svn.berlios.de/openocd/trunk@210 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/target/image.c

@@ -949,3 +949,34 @@ int image_close(image_t *image)
 	
 	return ERROR_OK;
 }
+
+static u32 crc32_table[256] = {0, 0};
+
+int image_calculate_checksum(u8* buffer, u32 nbytes, u32* checksum)
+{
+	u32 crc = 0xffffffff;
+	
+	if (!crc32_table[1])
+	{
+		/* Initialize the CRC table and the decoding table.  */
+		int i, j;
+		unsigned int c;
+		for (i = 0; i < 256; i++)
+		{
+			/* as per gdb */
+			for (c = i << 24, j = 8; j > 0; --j)
+				c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+			crc32_table[i] = c;
+		}
+	}
+	
+	while (nbytes--)
+	{
+		/* as per gdb */
+		crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
+	}
+	
+	*checksum = crc;
+	return ERROR_OK;
+}
+