feat: add initial impl of efi-stub and kernel

arch/x86/boot/helper.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+generate_offset_header() {
+    echo "processing $1"
+    nm -n "$1" \
+    | grep -e ' _\(end\|edata\|data\)$' \
+    | awk '{print "#define CAP_" $3 " 0x" $1}' \
+    > arch/x86/boot/offset.h
+    nm -n "$1" \
+    | grep -e ' efi_pe_entry$' \
+    | awk '{print "#define efi_pe_entry 0x" $1}' \
+    >> arch/x86/boot/offset.h
+}
+build_image() {
+    echo "building image from $1 and $2"
+    (dd if=$1 bs=4k conv=sync; cat $2) > yukiImage
+}
+# Main dispatcher
+case "$1" in
+    generate_offset_header)
+        generate_offset_header "$2"
+        ;;
+    build_image)
+        build_image "$2" "$3"
+        ;;
+    *)
+        echo "Usage: $0 {generate_offset_header|build_image} [args...]"
+        exit 1
+        ;;
+esac