wrote a basic bootloader

2025-02-25 01:14:52 +00:00
commit 012b0454ed
36 changed files with 1667 additions and 0 deletions
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+#!/bin/bash
+set -e
+
+# Build the bootloader
+nasm -f bin mbr.asm -o mbr.bin
+
+# Build the kernel
+cargo build --release
+
+# Create disk image
+./create_image.sh
+
+# Write MBR
+dd if=mbr.bin of=disk.img conv=notrunc
+
+echo "Build complete! You can now boot disk.img"
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+#!/bin/bash
+set -e
+
+# Image configuration
+IMAGE_NAME="disk.img"
+IMAGE_SIZE_MB=64
+ESP_SIZE_MB=32  # EFI System Partition size
+
+# Create a new disk image
+dd if=/dev/zero of=$IMAGE_NAME bs=1M count=$IMAGE_SIZE_MB
+
+# Create partition table and ESP partition
+parted $IMAGE_NAME mklabel gpt
+parted $IMAGE_NAME mkpart ESP fat32 1MiB ${ESP_SIZE_MB}MiB
+parted $IMAGE_NAME set 1 esp on
+
+# Calculate offset for mounting
+SECTOR_SIZE=512
+START_SECTOR=$(parted $IMAGE_NAME -ms unit s print | grep "^1:" | cut -d: -f2 | tr -d 's')
+OFFSET=$((START_SECTOR * SECTOR_SIZE))
+
+# Create FAT32 filesystem
+LOOP_DEVICE=$(sudo losetup -f --show -o $OFFSET $IMAGE_NAME)
+sudo mkfs.fat -F 32 $LOOP_DEVICE
+
+# Mount the image
+MOUNT_POINT="/tmp/esp"
+mkdir -p $MOUNT_POINT
+sudo mount $LOOP_DEVICE $MOUNT_POINT
+
+# Create EFI directory structure
+sudo mkdir -p $MOUNT_POINT/EFI/BOOT
+
+# Copy kernel to the ESP
+# For UEFI boot, rename it to BOOTX64.EFI
+sudo cp target/x86_64-custom/release/kernel $MOUNT_POINT/EFI/BOOT/BOOTX64.EFI
+
+# For BIOS boot, also copy it to the root
+sudo cp target/x86_64-custom/release/kernel $MOUNT_POINT/
+
+# Cleanup
+sudo umount $MOUNT_POINT
+sudo losetup -d $LOOP_DEVICE
+rm -rf $MOUNT_POINT
+
+echo "Disk image created successfully!"