Add util-linux and gdb

board/raspberrypi/overlay/etc/default/dropbear

@@ -0,0 +1 @@
+DROPBEAR_ARGS="-s -D /etc/dropbear/"

board/raspberrypi/overlay/etc/dropbear/authorized_keys

@@ -0,0 +1 @@
+ssh-rsa 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 gabriel@gabriel-a65

board/raspberrypi/overlay/etc/dropbear/ssh_host_ecdsa_key

@@ -0,0 +1,9 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAaAAAABNlY2RzYS
+1zaGEyLW5pc3RwMjU2AAAACG5pc3RwMjU2AAAAQQQdYqMPAif9rmbY8dBWey1LjOMTbFMj
+NpM78M64OGpJ0oqj0/BHLGjJFXgHiDnptJmWjPObcbGpi9UU9k9AjwyGAAAAsNlste7ZbL
+XuAAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBB1iow8CJ/2uZtjx
+0FZ7LUuM4xNsUyM2kzvwzrg4aknSiqPT8EcsaMkVeAeIOem0mZaM85txsamL1RT2T0CPDI
+YAAAAhAK4+iOL7T/yz6pAZq9r11B8LNOkNilk9AbtMI/tHlteiAAAAEHJvb3RAcmFzcGJl
+cnJ5cGkBAgMEBQYH
+-----END OPENSSH PRIVATE KEY-----

board/raspberrypi/overlay/etc/dropbear/ssh_host_ecdsa_key.pub

@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBB1iow8CJ/2uZtjx0FZ7LUuM4xNsUyM2kzvwzrg4aknSiqPT8EcsaMkVeAeIOem0mZaM85txsamL1RT2T0CPDIY= root@raspberrypi

board/raspberrypi/overlay/etc/dropbear/ssh_host_ed25519_key

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACBQiu65JvR0Vvc86E6Ltb56WOUP+O6ly0jWvz3y+ad8HQAAAJhAtJG0QLSR
+tAAAAAtzc2gtZWQyNTUxOQAAACBQiu65JvR0Vvc86E6Ltb56WOUP+O6ly0jWvz3y+ad8HQ
+AAAEBfZMawzfTrqgXQ52Jr3eRJUDo024OotKQva+kS18ZFv1CK7rkm9HRW9zzoTou1vnpY
+5Q/47qXLSNa/PfL5p3wdAAAAEHJvb3RAcmFzcGJlcnJ5cGkBAgMEBQ==
+-----END OPENSSH PRIVATE KEY-----

board/raspberrypi/overlay/etc/dropbear/ssh_host_ed25519_key.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFCK7rkm9HRW9zzoTou1vnpY5Q/47qXLSNa/PfL5p3wd root@raspberrypi

board/raspberrypi/overlay/etc/dropbear/ssh_host_rsa_key

@@ -0,0 +1,38 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABlwAAAAdzc2gtcn
+NhAAAAAwEAAQAAAYEAokJrCpmpa5/VFfcPSRbLF1SwP7EIlirjlUrD1UqW5BRbptP8yt0Q
+KxsgBpjd8l3hm7H8Gzpe/T/zLE5qyNXEC2BWOt7oehpFp9zOvmYWl4kyDet/WdNqM7KSLk
+7jWIzB1uzraWEmWw6FckEdjkHvcuDsRcxqDk2ma6Ja99g/Zs8qBTxvvhTO5UR7OgFTXU1l
+D5C6oPmayJQqKD6dzUXJvp43j+NxFMb4Z48ytz6unZM3NRMQMTb9sbTr7zQ3yD93L1MkSV
+vnNcYzhgsoIh2+gsoEqUhMQNo0rCjbjYuRC4asrY5NOt+MIC/XbNtGEns22G83F/HgocwN
+9r1jllP6RuTbyuZVK654RMxqxGRBUzQMHcdpDjyy845GztsP57zC4moYZRh7VgwVxGRGoi
+nXYdbE+VJ2WxBBq5/j5MRTLxx7pLbac+sXw4Ed9rRqMpYzC+iskeJ4uU4mcLpZDSGw9SDh
+xVrusD6SF1eRTXtJWNvDPVU4VqtDTaFm8p/7sNpvAAAFiB4LdtgeC3bYAAAAB3NzaC1yc2
+EAAAGBAKJCawqZqWuf1RX3D0kWyxdUsD+xCJYq45VKw9VKluQUW6bT/MrdECsbIAaY3fJd
+4Zux/Bs6Xv0/8yxOasjVxAtgVjre6HoaRafczr5mFpeJMg3rf1nTajOyki5O41iMwdbs62
+lhJlsOhXJBHY5B73Lg7EXMag5NpmuiWvfYP2bPKgU8b74UzuVEezoBU11NZQ+QuqD5msiU
+Kig+nc1Fyb6eN4/jcRTG+GePMrc+rp2TNzUTEDE2/bG06+80N8g/dy9TJElb5zXGM4YLKC
+IdvoLKBKlITEDaNKwo242LkQuGrK2OTTrfjCAv12zbRhJ7NthvNxfx4KHMDfa9Y5ZT+kbk
+28rmVSuueETMasRkQVM0DB3HaQ48svOORs7bD+e8wuJqGGUYe1YMFcRkRqIp12HWxPlSdl
+sQQauf4+TEUy8ce6S22nPrF8OBHfa0ajKWMwvorJHieLlOJnC6WQ0hsPUg4cVa7rA+khdX
+kU17SVjbwz1VOFarQ02hZvKf+7DabwAAAAMBAAEAAAGAA7BH16oDmHSTNwMdSqzlJAbNqj
+z/iXkNyxHeiXrpxY3oQXl14zS1o+KOI/2V+hGunx1OMl5C1OCpygWPAY7JJ0sNhXFreS8f
+YJVb8ScdTLJBPDYbeIgeVMYynYaMk4brodOpTFrO25NlGYz9ENlTNK+D9Ng/RvZL72F1o5
+xmYJNwDJtsR4wYjKILEm1U9FIzQcXUAEnRqM1OzLMTtPFpCIIh7Y2e6fkrTMthZ0Svr9mu
+D8ZQVWtpxqrqvCQvP8hK3OL1qvXBqBOagq39kMcvZLtfgokwJ4dC8nJXKvXO3BSlgH3pVL
+5QmMCOiDqAXpoOyOwOGx3gxROytSVF/O9r7avudcTIShh3cugqCe0jNPHR95DMMkpJOAG6
+RTIQ2CCamQ8Gm7wtI2MLz1oulUdsIiQeFIbDUg7JWkAZioD0yeLk5KGKm8fR+oMRvh5//G
+zkqqCFvUuyEVxn+V/eyZDhlH2Q8YiFAIndRUPezyKP2fM060BFZsYEQBOqyVTEM5vZAAAA
+wHaThop06jKJXD5A/dBWdS8RpKUscKPwIaN1LFbAAA8zKOWXsojWZP1+txcW+vMLZ2poGl
+wp0T+ILU0/wh2jZERgUf0i65CZ6UksM2pJtcBCf93qRLvlr1a1CtFJYEkSbTtaOcG3ZmZc
+LcjBQYA/fc6i1XAO6KbUEEjV10oATuaVz+7L4oKpaL9BBJZrVVB4s3vrKLiYHiX0NcckwT
+HgLkOhgVeH3UVxcT7SiAJmR+fVK4kE5WR9dxbMdyTa0E/b6gAAAMEA0XNTJnWr0RBrFI7M
+NJWnG4p6B+dxmSEJ78e17PYAo59X8FJSAuBX7La8cIgRhd7LXL/RxKRM+KN0nOoP52xgT2
+F/QNDk4hq2PGC4IdiMVi51N62t8okqHhEFbDsyVchq9jHpEGlCo+ia8RSvh0qqkeLenP+I
+akT+lmNCt5zFCm9JnoQcfIa2ACz5Lil584+ggX+zc7jgRWzWQDDTzEH+QzQRlWv3lMIe7Y
+8U2q6EURS77IXFEv+ZDbRFKJiTJ2pJAAAAwQDGUilMsiz8/myNAdvIDtW/1rYl4i6HZ6Mg
+DKwXRDugUg19yUHQli9oK5bbCo+heO1yxwSOCyBP+9EUaK6/ITA3oVogxEut/0m+fDPzeg
+Odn0dyTEpJLq3BiZRkmZ2O9NH7HnBS+XlvzwT+yR1eg9ydDC0LY8Q+us9vJDVG9VSMsGIw
+n4cCzXDbD9NcN/uvkTl4pnunqtYLYe29Q99VJkus8glrKhGz3b06mTDtex+csBySniMY7W
+LsdYhCGe6O3vcAAAAQcm9vdEByYXNwYmVycnlwaQECAw==
+-----END OPENSSH PRIVATE KEY-----

board/raspberrypi/overlay/etc/dropbear/ssh_host_rsa_key.pub

@@ -0,0 +1 @@
+ssh-rsa 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 root@raspberrypi

configs/raspberrypi_defconfig

@@ -2,9 +2,12 @@ BR2_arm=y
 BR2_arm1176jzf_s=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_6=y
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_PACKAGE_HOST_GDB=y
+BR2_GDB_VERSION_16=y
 BR2_GLOBAL_PATCH_DIR="board/raspberrypi/patches"
 BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
 BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_OVERLAY="board/raspberrypi/overlay/"
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi/post-image.sh"
 BR2_LINUX_KERNEL=y
@@ -14,19 +17,33 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2708-rpi-b-rev1 broadcom/bcm2708-rpi-b broadcom/bcm2708-rpi-b-plus broadcom/bcm2708-rpi-cm"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
-BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
 BR2_PACKAGE_XZ=y
+BR2_PACKAGE_GDB=y
 BR2_PACKAGE_RPI_FIRMWARE=y
 BR2_PACKAGE_RPI_FIRMWARE_BOOTCODE_BIN=y
 BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI=y
 BR2_PACKAGE_RPI_FIRMWARE_CONFIG_FILE="board/raspberrypi/config_default.txt"
 # BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
+BR2_PACKAGE_LIBGPIOD2=y
+BR2_PACKAGE_LIBGPIOD2_TOOLS=y
+BR2_PACKAGE_DROPBEAR=y
+BR2_PACKAGE_IPERF3=y
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+BR2_PACKAGE_HTOP=y
 BR2_PACKAGE_KMOD=y
-BR2_PACKAGE_KMOD_TOOLS=y
+BR2_PACKAGE_UTIL_LINUX=y
+BR2_PACKAGE_UTIL_LINUX_BINARIES=y
+BR2_PACKAGE_NANO=y
+# BR2_PACKAGE_NANO_TINY is not set
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
-# BR2_TARGET_ROOTFS_TAR is not set
+BR2_TARGET_ROOTFS_TAR_XZ=y
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="rpi"
+BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
+BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
 BR2_PACKAGE_HOST_DOSFSTOOLS=y
 BR2_PACKAGE_HOST_GENIMAGE=y
 BR2_PACKAGE_HOST_KMOD_XZ=y

flash.sh

@@ -0,0 +1,311 @@
+#!/bin/bash
+
+# Flash Buildroot SD card image to SD card
+# Usage: ./flash.sh /dev/sdX
+
+set -e  # Exit on error
+
+# Color codes for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+# Default image path
+IMAGE_PATH="output/images/sdcard.img"
+
+# Function to print colored messages
+print_error() {
+    echo -e "${RED}ERROR: $1${NC}" >&2
+}
+
+print_success() {
+    echo -e "${GREEN}$1${NC}"
+}
+
+print_warning() {
+    echo -e "${YELLOW}WARNING: $1${NC}"
+}
+
+print_info() {
+    echo -e "$1"
+}
+
+# Function to show usage
+usage() {
+    echo "Usage: $0 [-y] <device> [image_path]"
+    echo ""
+    echo "Options:"
+    echo "  -y          Skip confirmation prompt (automatic yes)"
+    echo ""
+    echo "Arguments:"
+    echo "  device      Path to SD card device (e.g., /dev/sdb, /dev/mmcblk0)"
+    echo "  image_path  Path to image file (default: sdcard.img)"
+    echo ""
+    echo "Examples:"
+    echo "  $0 /dev/sdb"
+    echo "  $0 /dev/mmcblk0 output/images/sdcard.img"
+    echo "  $0 -y /dev/sdb sdcard.img"
+    exit 1
+}
+
+# Check if running as root
+check_root() {
+    if [ "$EUID" -ne 0 ]; then
+        print_error "This script must be run as root or with sudo"
+        exit 1
+    fi
+}
+
+# Check if device is removable (likely SD card or USB)
+is_removable() {
+    local device=$1
+    local device_name=$(basename "$device")
+    
+    # For mmcblk devices, check the device itself
+    if [[ "$device_name" =~ ^mmcblk[0-9]+p?[0-9]*$ ]]; then
+        device_name=$(echo "$device_name" | sed 's/p[0-9]*$//')
+    fi
+    
+    # For sd devices, remove partition number
+    if [[ "$device_name" =~ ^sd[a-z][0-9]*$ ]]; then
+        device_name=$(echo "$device_name" | sed 's/[0-9]*$//')
+    fi
+    
+    # Check if removable flag is set
+    local removable_file="/sys/block/${device_name}/removable"
+    if [ -f "$removable_file" ]; then
+        local removable=$(cat "$removable_file")
+        if [ "$removable" = "1" ]; then
+            return 0  # Is removable
+        fi
+    fi
+    
+    # Additional check: SD cards often show up in specific subsystems
+    local device_path="/sys/block/${device_name}/device"
+    if [ -d "$device_path" ]; then
+        # Check if it's an MMC/SD device
+        if readlink -f "$device_path" | grep -q "mmc"; then
+            return 0  # Is MMC/SD device
+        fi
+        
+        # Check if it's a USB device
+        if readlink -f "$device_path" | grep -q "usb"; then
+            return 0  # Is USB device (could be USB card reader)
+        fi
+    fi
+    
+    return 1  # Not removable
+}
+
+# Get human-readable device info
+get_device_info() {
+    local device=$1
+    local device_name=$(basename "$device")
+    
+    # Remove partition number if present
+    if [[ "$device_name" =~ ^mmcblk[0-9]+p?[0-9]*$ ]]; then
+        device_name=$(echo "$device_name" | sed 's/p[0-9]*$//')
+    elif [[ "$device_name" =~ ^sd[a-z][0-9]*$ ]]; then
+        device_name=$(echo "$device_name" | sed 's/[0-9]*$//')
+    fi
+    
+    # Get model and size info
+    local model_file="/sys/block/${device_name}/device/model"
+    local size_file="/sys/block/${device_name}/size"
+    
+    local model="Unknown"
+    local size_bytes=0
+    
+    if [ -f "$model_file" ]; then
+        model=$(cat "$model_file" | tr -d '\n' | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
+    fi
+    
+    if [ -f "$size_file" ]; then
+        # Size is in 512-byte sectors
+        size_bytes=$(($(cat "$size_file") * 512))
+    fi
+    
+    # Convert to GB
+    local size_gb=$(awk "BEGIN {printf \"%.2f\", $size_bytes/1024/1024/1024}")
+    
+    echo "Model: $model, Size: ${size_gb}GB"
+}
+
+# Validate device path
+validate_device() {
+    local device=$1
+    
+    # Check if device exists
+    if [ ! -b "$device" ]; then
+        print_error "Device $device does not exist or is not a block device"
+        exit 1
+    fi
+    
+    # Get device information
+    local device_info=$(get_device_info "$device")
+    print_info "Device info: $device_info"
+    
+    # Check if device is removable (SD card or USB)
+    if ! is_removable "$device"; then
+        print_error "Device $device does not appear to be a removable device (SD card or USB)"
+        print_error "This safety check prevents accidentally flashing internal drives"
+        print_warning "If you are certain this is correct, you can modify the script to bypass this check"
+        exit 1
+    fi
+    
+    print_success "Device $device appears to be a removable device (SD card/USB)"
+}
+
+# Validate image file
+validate_image() {
+    local image=$1
+    
+    if [ ! -f "$image" ]; then
+        print_error "Image file $image does not exist"
+        exit 1
+    fi
+    
+    if [ ! -r "$image" ]; then
+        print_error "Image file $image is not readable"
+        exit 1
+    fi
+}
+
+# Unmount all partitions of the device
+unmount_device() {
+    local device=$1
+    
+    print_info "Checking for mounted partitions on $device..."
+    
+    # Handle both /dev/sdX and /dev/mmcblkX naming schemes
+    if [[ "$device" == *"mmcblk"* ]] || [[ "$device" == *"loop"* ]]; then
+        # For mmcblk devices, partitions are named like mmcblk0p1, mmcblk0p2
+        partitions=$(lsblk -ln -o NAME "$device" | tail -n +2 | sed "s|^|/dev/|")
+    else
+        # For sd devices, partitions are named like sdb1, sdb2
+        partitions=$(lsblk -ln -o NAME "$device" | tail -n +2 | sed "s|^|/dev/|")
+    fi
+    
+    # Unmount each partition
+    for partition in $partitions; do
+        if mountpoint -q "$partition" 2>/dev/null || grep -qs "$partition" /proc/mounts; then
+            print_info "Unmounting $partition..."
+            if ! umount "$partition" 2>/dev/null; then
+                print_warning "Failed to unmount $partition, trying lazy unmount..."
+                umount -l "$partition" || true
+            fi
+        fi
+    done
+    
+    # Give the system a moment to release the device
+    sleep 1
+    
+    print_success "All partitions unmounted"
+}
+
+# Flash the image
+flash_image() {
+    local device=$1
+    local image=$2
+    
+    # Perform the flash operation
+    print_info "Writing image..."
+    if command -v pv &> /dev/null; then
+        # Use pv for progress if available
+        pv "$image" | dd of="$device" bs=4M conv=fsync status=none
+    else
+        # Fall back to dd with progress
+        dd if="$image" of="$device" bs=4M conv=fsync status=progress
+    fi
+    
+    # Ensure all data is written
+    print_info "Syncing filesystem..."
+    sync
+    
+    print_success "Image successfully flashed to $device!"
+}
+
+# Main script execution
+main() {
+    local skip_confirm="no"
+    local device=""
+    local image=""
+    
+    # Parse command line arguments
+    while [[ $# -gt 0 ]]; do
+        case $1 in
+            -y)
+                skip_confirm="yes"
+                shift
+                ;;
+            -*)
+                print_error "Unknown option: $1"
+                usage
+                ;;
+            *)
+                if [ -z "$device" ]; then
+                    device=$1
+                elif [ -z "$image" ]; then
+                    image=$1
+                else
+                    print_error "Too many arguments"
+                    usage
+                fi
+                shift
+                ;;
+        esac
+    done
+    
+    # Check if device was provided
+    if [ -z "$device" ]; then
+        usage
+    fi
+    
+    # Set default image if not provided
+    image=${image:-$IMAGE_PATH}
+    
+    print_info "================================"
+    print_info "Buildroot SD Card Flash Script"
+    print_info "================================"
+    print_info "Device: $device"
+    print_info "Image:  $image"
+    print_info ""
+    
+    # Run checks
+    check_root
+    validate_device "$device"
+    validate_image "$image"
+    
+    # Get user confirmation before unmounting
+    # (unmount will happen in flash_image after confirmation)
+    local image_size=$(stat -c%s "$image")
+    local image_size_mb=$((image_size / 1024 / 1024))
+    
+    print_info "Ready to flash $image (${image_size_mb} MB) to $device"
+    print_warning "This will DESTROY all data on $device!"
+    
+    if [ "$skip_confirm" != "yes" ]; then
+        read -p "Continue? [y/N] " -r
+        echo
+        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+            print_info "Aborted by user"
+            exit 0
+        fi
+    else
+        print_info "Skipping confirmation due to -y flag"
+    fi
+    
+    # Now unmount the device after confirmation
+    unmount_device "$device"
+    
+    # Flash image
+    flash_image "$device" "$image"
+    
+    print_info ""
+    print_success "✓ Flashing complete!"
+    print_info "You can now safely remove the SD card"
+}
+
+# Run main function
+main "$@"