【树莓派学习】003 cross compile

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mac pro要交叉编译树莓派linux的源码, 最好还是用ubuntu镜像。

ubuntu24.04 docker中编译, 参考dev

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docker pull ghcr.io/falcon-infra/dev:ubuntu24.04

这里注意不要用mac mount的路径, 用docker中的文件系统路径。不然会有git工作区的问题。

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warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

  'include/uapi/linux/netfilter/xt_CONNMARK.h'
  'include/uapi/linux/netfilter/xt_connmark.h'
  'include/uapi/linux/netfilter/xt_DSCP.h'
  'include/uapi/linux/netfilter/xt_dscp.h'
  'include/uapi/linux/netfilter/xt_MARK.h'
  'include/uapi/linux/netfilter/xt_mark.h'
  'include/uapi/linux/netfilter/xt_RATEEST.h'
  'include/uapi/linux/netfilter/xt_rateest.h'
  'include/uapi/linux/netfilter/xt_TCPMSS.h'
  'include/uapi/linux/netfilter/xt_tcpmss.h'
  'include/uapi/linux/netfilter_ipv4/ipt_ECN.h'
  'include/uapi/linux/netfilter_ipv4/ipt_ecn.h'
  'include/uapi/linux/netfilter_ipv4/ipt_TTL.h'
  'include/uapi/linux/netfilter_ipv4/ipt_ttl.h'
  'include/uapi/linux/netfilter_ipv6/ip6t_HL.h'
  'include/uapi/linux/netfilter_ipv6/ip6t_hl.h'
  'net/netfilter/xt_DSCP.c'
  'net/netfilter/xt_dscp.c'
  'net/netfilter/xt_HL.c'
  'net/netfilter/xt_hl.c'
  'net/netfilter/xt_RATEEST.c'
  'net/netfilter/xt_rateest.c'
  'net/netfilter/xt_TCPMSS.c'
  'net/netfilter/xt_tcpmss.c'
  'tools/memory-model/litmus-tests/Z6.0+pooncelock+poonceLock+pombonce.litmus'
  'tools/memory-model/litmus-tests/Z6.0+pooncelock+pooncelock+pombonce.litmus'

This warning occurs on a case-insensitive filesystem (like macOS’s APFS or Windows’ NTFS) when a Git repository contains files whose names differ only in case. Git detects these as potential conflicts because the filesystem treats them as identical.

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git clone --depth=1 https://github.com/raspberrypi/linux.git
cd linux
apt install bc
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mkdir build
make O=build bcm2711_defconfig
bear -- make O=build -j10 Image.gz modules dtbs
make O=build modules_install INSTALL_MOD_PATH=.

debug config

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cat >> build/.config << 'EOF'
# Early Debug Configuration
CONFIG_DEBUG_INFO=y
CONFIG_GDB_SCRIPTS=y
CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_LL=y
CONFIG_DEBUG_UART_PL011=y
CONFIG_DEBUG_UART_PHYS=0x3f215040
CONFIG_DEBUG_UART_VIRT=0xf215040
CONFIG_DEBUG_UNCOMPRESS=y
CONFIG_DEBUG_LL_INCLUDE="debug/8250.S"
EOF

~/.config/clangd/config.yaml

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CompileFlags:
  Remove: [-mabi=lp64]

install-rpi.sh

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# 🎯 完整传输（rsync + sudo，权限OK）

KVER=$(ls build/lib/modules/ | head -1)
echo "模块版本: $KVER"

# 1. Image.gz（压缩内核，必须）
rsync -avz build/arch/arm64/boot/Image.gz pi@192.168.1.95:/boot/firmware/ --rsync-path="sudo rsync"

# 2. DTB（设备树，bcm2711/rpi5）
rsync -avz build/arch/arm64/boot/dts/broadcom/*.dtb pi@192.168.1.95:/boot/firmware/ --rsync-path="sudo rsync"

# 3. Overlays（驱动叠加，必须完整目录）
rsync -avz --delete build/arch/arm64/boot/dts/overlays/ pi@192.168.1.95:/boot/firmware/overlays/ --rsync-path="sudo rsync"

# 4. Modules（驱动模块，关键！）
rsync -avz --delete build/lib/modules/$KVER/ pi@192.168.1.95:/lib/modules/$KVER/ --rsync-path="sudo rsync"
ssh pi@192.168.1.95 "sudo depmod -a $KVER && echo 'depmod完成'"

# 5. 更新 + 重启
ssh pi@192.168.1.95 'cd ~/code/kernel-update && ./update-kernel.sh && sudo reboot'

~/code/kernel-update/backup-kernel.sh

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#!/bin/bash
# 保存到: ~/code/kernel-update/backup-kernel.sh

echo "=== 开始备份当前内核和配置 ==="

# 创建备份目录
sudo mkdir -p /boot/firmware/backup
BACKUP_DIR="/boot/firmware/backup/$(date +%Y%m%d_%H%M%S)"
sudo mkdir -p "$BACKUP_DIR"

# 备份内核文件
echo "备份内核文件..."
sudo cp /boot/firmware/kernel8.img "$BACKUP_DIR/"
sudo cp /boot/firmware/Image.gz "$BACKUP_DIR/" 2>/dev/null || true

# 备份配置文件
echo "备份配置文件..."
sudo cp /boot/firmware/config.txt "$BACKUP_DIR/"
sudo cp /boot/firmware/cmdline.txt "$BACKUP_DIR/"

# 备份设备树
echo "备份设备树..."
sudo cp /boot/firmware/*.dtb "$BACKUP_DIR/" 2>/dev/null || true
sudo cp -r /boot/firmware/overlays "$BACKUP_DIR/" 2>/dev/null || true

# 备份网络配置（重要！）
echo "备份网络配置..."
sudo cp -r /etc/netplan "$BACKUP_DIR/" 2>/dev/null || true
sudo cp -r /etc/NetworkManager "$BACKUP_DIR/" 2>/dev/null || true

echo "=== 备份完成 ==="
echo "备份位置: $BACKUP_DIR"
echo "当前备份列表:"
sudo ls -la "$BACKUP_DIR"

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#!/bin/bash
# 保存到: ~/code/kernel-update/update-kernel.sh

echo "=== 开始更新内核 ==="

# 检查新内核文件是否存在
if [ ! -f "/boot/firmware/Image.gz" ]; then
    echo "错误: 未找到新内核文件 /boot/firmware/Image.gz"
    echo "请先传输新内核文件"
    exit 1
fi

# 备份当前配置
./backup-kernel.sh

# 配置使用新内核
echo "配置使用新内核..."
sudo cp /boot/firmware/config.txt /boot/firmware/config.txt.backup

# 在config.txt中启用新内核
if grep -q "kernel=Image.gz" /boot/firmware/config.txt; then
    echo "新内核已配置"
else
    # 注释原内核，启用新内核
    sudo sed -i 's/^kernel=/#kernel=/' /boot/firmware/config.txt
    echo "kernel=Image.gz" | sudo tee -a /boot/firmware/config.txt
fi

echo "=== 内核更新配置完成 ==="
echo "重启后生效: sudo reboot"
echo "验证命令: uname -r"

验证

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% ssh pi@pi                                                                                             yuanqi@MacBook-Pro-2
Linux pi 6.12.57-v8+ #1 SMP PREEMPT Fri Nov 14 20:56:44 CST 2025 aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sun Dec  7 14:02:19 2025 from 192.168.1.100
pi@pi:~ $ uname -r
6.12.57-v8+

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#!/bin/bash
# 保存到: ~/code/kernel-update/restore-kernel.sh

echo "=== 内核恢复工具 ==="

# 查找最新的备份
LATEST_BACKUP=$(sudo ls -td /boot/firmware/backup/*/ | head -1)

if [ -z "$LATEST_BACKUP" ]; then
    echo "错误: 未找到备份文件"
    exit 1
fi

echo "找到备份: $LATEST_BACKUP"
echo "恢复内容:"
sudo ls -la "$LATEST_BACKUP"

read -p "确认恢复？(y/n): " confirm
if [ "$confirm" != "y" ]; then
    echo "取消恢复"
    exit 0
fi

# 恢复内核文件
echo "恢复内核文件..."
sudo cp "$LATEST_BACKUP/kernel8.img" /boot/firmware/ 2>/dev/null || true
sudo cp "$LATEST_BACKUP/Image.gz" /boot/firmware/ 2>/dev/null || true

# 恢复配置文件
echo "恢复配置文件..."
sudo cp "$LATEST_BACKUP/config.txt" /boot/firmware/
sudo cp "$LATEST_BACKUP/cmdline.txt" /boot/firmware/

# 恢复设备树
echo "恢复设备树..."
sudo cp "$LATEST_BACKUP"/*.dtb /boot/firmware/ 2>/dev/null || true
sudo cp -r "$LATEST_BACKUP/overlays" /boot/firmware/ 2>/dev/null || true

# 恢复网络配置（如果需要）
if [ -d "$LATEST_BACKUP/netplan" ]; then
    echo "恢复网络配置..."
    sudo cp -r "$LATEST_BACKUP/netplan" /etc/
    sudo netplan apply
fi

echo "=== 恢复完成 ==="
echo "请重启: sudo reboot"