db8f25a518
- Add extract_firmware.sh for extracting firmware components from merged bins - Add merge_2323_firmware.sh for merging PA768 updater, firmware and IUM data - Add split_and_merge.sh for splitting firmware and creating 40W firmware - Add comprehensive README.md with usage documentation and examples
129 lines
3.8 KiB
Bash
Executable File
129 lines
3.8 KiB
Bash
Executable File
#!/bin/bash
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# 用法: ./extract_firmware.sh <merged_bin> [output_prefix]
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# 从合并的 bin 文件中提取 head file (firmware), tail file (IUM), 以及生成 metadata.json
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#
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# 文件布局:
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# 0x04000: firmware (head file)
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# 0x1dc00: IUM (tail file, 256 bytes)
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# 0x1dd00: metadata (blocks: uint16, last_block_size: uint8)
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INPUT="$1"
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# 如果没有传 PREFIX，使用原文件名（去掉扩展名）
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if [ -n "$2" ]; then
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PREFIX="$2"
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else
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# 获取文件名（不含路径），然后去掉扩展名
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BASENAME=$(basename "$INPUT")
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PREFIX="${BASENAME%.*}"
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fi
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if [ -z "$INPUT" ]; then
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echo "用法: $0 <merged_bin> [output_prefix]"
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echo "示例: $0 40_ufcs2.bin firmware"
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echo " $0 40_ufcs2.bin # 使用原文件名作为前缀"
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echo ""
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echo "输出文件:"
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echo " {prefix}.firmware - firmware 部分"
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echo " {prefix}.ium - IUM 部分 (256 bytes)"
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echo " {prefix}_metadata.json - 元数据"
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echo ""
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echo "注: 如果不指定 output_prefix，将使用原文件名（去掉扩展名）"
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exit 1
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fi
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if [ ! -f "$INPUT" ]; then
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echo "错误: 文件不存在: $INPUT"
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exit 1
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fi
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# 常量定义
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FIRMWARE_OFFSET=$((0x4000)) # 16384
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IUM_OFFSET=$((0x1dc00)) # 121856
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METADATA_OFFSET=$((0x1dd00)) # 122112
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IUM_SIZE=256
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# 获取文件大小
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if stat --version >/dev/null 2>&1; then
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FILE_SIZE=$(stat -c%s "$INPUT") # Linux
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else
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FILE_SIZE=$(stat -f%z "$INPUT") # macOS
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fi
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echo "输入文件: $INPUT"
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echo "文件大小: $FILE_SIZE bytes (0x$(printf '%x' $FILE_SIZE))"
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echo ""
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# 读取 metadata (位于 0x1dd00)
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# 结构: uint16_t blocks (little-endian), uint8_t last_block_size
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echo "读取 metadata (offset 0x1dd00)..."
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METADATA=$(dd if="$INPUT" bs=1 skip=$METADATA_OFFSET count=3 2>/dev/null | xxd -p)
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if [ ${#METADATA} -lt 6 ]; then
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echo "错误: 无法读取 metadata"
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exit 1
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fi
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# 解析 little-endian uint16 (blocks) 和 uint8 (last_block_size)
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BLOCKS_LOW=$((16#${METADATA:0:2}))
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BLOCKS_HIGH=$((16#${METADATA:2:2}))
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BLOCKS=$(( BLOCKS_LOW + BLOCKS_HIGH * 256 ))
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LAST_BLOCK_SIZE=$((16#${METADATA:4:2}))
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echo " blocks: $BLOCKS (0x$(printf '%04x' $BLOCKS))"
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echo " last_block_size: $LAST_BLOCK_SIZE (0x$(printf '%02x' $LAST_BLOCK_SIZE))"
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# 计算 firmware 大小
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FIRMWARE_SIZE=$(( BLOCKS * 256 + LAST_BLOCK_SIZE ))
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echo " 计算出 firmware 大小: $FIRMWARE_SIZE bytes"
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echo ""
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# 提取 head file (firmware: 从 0x4000 开始)
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HEAD_FILE="${PREFIX}.firmware"
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echo "提取 head file (firmware)..."
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dd if="$INPUT" of="$HEAD_FILE" bs=1 skip=$FIRMWARE_OFFSET count=$FIRMWARE_SIZE status=none
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if [ $? -eq 0 ]; then
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ACTUAL_HEAD_SIZE=$(stat -f%z "$HEAD_FILE" 2>/dev/null || stat -c%s "$HEAD_FILE" 2>/dev/null)
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echo " ✓ 已保存: $HEAD_FILE ($ACTUAL_HEAD_SIZE bytes)"
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else
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echo " ✗ 提取失败"
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exit 1
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fi
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# 提取 tail file (IUM: 从 0x1dc00 开始, 256 bytes)
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TAIL_FILE="${PREFIX}.ium"
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echo "提取 tail file (IUM)..."
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dd if="$INPUT" of="$TAIL_FILE" bs=1 skip=$IUM_OFFSET count=$IUM_SIZE status=none
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if [ $? -eq 0 ]; then
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ACTUAL_TAIL_SIZE=$(stat -f%z "$TAIL_FILE" 2>/dev/null || stat -c%s "$TAIL_FILE" 2>/dev/null)
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echo " ✓ 已保存: $TAIL_FILE ($ACTUAL_TAIL_SIZE bytes)"
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else
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echo " ✗ 提取失败"
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exit 1
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fi
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# 生成 metadata.json
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METADATA_FILE="${PREFIX}_metadata.json"
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echo "生成 metadata.json..."
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cat > "$METADATA_FILE" << EOF
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{"blocks": "0x$(printf '%04x' $BLOCKS)", "lastBlockSize": "0x$(printf '%02x' $LAST_BLOCK_SIZE)"}
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EOF
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echo " ✓ 已保存: $METADATA_FILE"
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echo ""
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# 显示结果
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echo "========================================="
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echo "提取完成!"
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echo ""
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echo "输出文件:"
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echo " Head (firmware): $HEAD_FILE ($ACTUAL_HEAD_SIZE bytes)"
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echo " Tail (IUM): $TAIL_FILE ($ACTUAL_TAIL_SIZE bytes)"
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echo " Metadata: $METADATA_FILE"
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echo ""
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echo "Metadata 内容:"
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cat "$METADATA_FILE"
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echo "" |