1 files changed, 78 insertions, 0 deletions
diff --git a/boot/Makefile b/boot/Makefile
new file mode 100644
index 0000000..b49690c
--- /dev/null
+++ b/boot/Makefile
@@ -0,0 +1,78 @@
+# ============================================================================
+# boot/Makefile - UEFI Loader Build
+# Produces: $(RESULT_DIR)/BOOTX64.EFI (x86) or BOOTAA64.EFI(aarch64)
+#
+# Strategy: Compile with Clang targeting Windows PE32+, link with lld-link.
+# This produces a native .efi (PE32+) directly - no objcopy needed.
+# TODO: create PE header in the code, and get rid from clang dependency
+# ============================================================================
+
+include ../config.mk
+-include ../config_generated.mk
+
+COMMON_SRC := \
+    common/efi_loader.cpp \
+    common/efi_elf_parser.cpp
+
+ARCH_SRC := \
+    $(ARCH)/entry.cpp
+
+SRC := $(COMMON_SRC) $(ARCH_SRC)
+OBJ := $(patsubst %.cpp,%.o,$(SRC))
+
+# ── UEFI-specific flags ────────────────────────────────────────────────────
+# Compile as PE/COFF using Clang's Windows target with -fshort-wchar.
+
+ifeq ($(ARCH),x86_64)
+    EFI_TARGET  := x86_64-unknown-windows
+    EFI_BINARY  := BOOTX64.EFI
+    EFI_MFLAGS  := -mno-red-zone #https://os.phil-opp.com/red-zone/#:~:text=Disable%20the%20Red%20Zone%20%7C%20Writing%20an%20OS%20in%20Rust
+else ifeq ($(ARCH),aarch64)
+    EFI_TARGET  := aarch64-unknown-windows
+    EFI_BINARY  := BOOTAA64.EFI
+    EFI_MFLAGS  :=
+endif
+
+EFI_CXXFLAGS := \
+    -target $(EFI_TARGET) \
+    -std=c++23 \
+    -ffreestanding \
+    -fno-exceptions \
+    -fno-rtti \
+    -fno-stack-protector \
+    -fno-threadsafe-statics \
+    -fno-use-cxa-atexit \
+    -fshort-wchar \
+    -nostdlib \
+    -Wall -Wextra \
+    -Werror=return-type \
+    -O2 -g \
+    $(EFI_MFLAGS) \
+    -I../include \
+    -include $(PROJECT_ROOT)/include/kernel/config.h \
+    -DEFI_ARCH_$(shell echo $(ARCH) | tr a-z A-Z)
+
+EFI_LDFLAGS := \
+    -flavor link \
+    -subsystem:efi_application \
+    -entry:efi_main \
+    -nodefaultlib
+
+# ── Targets ─────────────────────────────────────────────────────────────────
+
+.PHONY: all clean
+
+all: $(RESULT_DIR)/$(EFI_BINARY)
+
+# Link directly to PE32+ .efi
+$(RESULT_DIR)/$(EFI_BINARY): $(OBJ)
+	@mkdir -p $(dir $@)
+	@echo "  LINK  $@"
+	@lld-link $(EFI_LDFLAGS) $(OBJ) -out:$@
+
+%.o: %.cpp
+	@echo "  CXX   $<"
+	@$(CXX) $(EFI_CXXFLAGS) -c $< -o $@
+
+clean:
+	find . -name '*.o' -delete