From 09be8ace254a7f8bb69542d09a6b2013636123a2 Mon Sep 17 00:00:00 2001
From: Nathan Lee <me@nwlee.tech>
Date: Sun, 13 Sep 2026 17:46:26 -0500
Subject: EFI boot header support

---
 Makefile | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 8ea760b..ad38c9a 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,7 @@ VERSION = 0.1.0-alpha
 
 CC = clang
 LD = ld.lld
+NM = llvm-nm
 OBJCOPY = llvm-objcopy
 
 COMPILER = $(shell $(CC) --version | head -n 1)
@@ -99,20 +100,27 @@ KERNEL_OBJS = $(KERNEL_SRCS:.c=.o)
 KERNEL_OBJS := $(KERNEL_OBJS:.S=.o)
 KERNEL_BIN := $(KERNEL_TARGET)/kernel.bin
 KERNEL_ELF := $(KERNEL_TARGET)/kernel.elf
+KERNEL_IMAGE := $(KERNEL_TARGET)/Image
+
+KASSEMBLE_BIN := misc/kassemble
+KASSEMBLE_SRC := misc/kassemble.c
 
 GENERATED = \
 	$(KERNEL_OBJS) \
 	$(KERNEL_ELF) \
 	$(KERNEL_BIN) \
+	$(KERNEL_IMAGE) \
 	$(foreach m,$(MODULES),$(m)/$(m).elf) \
 	$(foreach m,$(MODULES),$(m)/$(m).ko) \
-	$(foreach m,$(MODULES),$($(m)_OBJS))
+	$(foreach m,$(MODULES),$($(m)_OBJS)) \
+	$(KASSEMBLE_BIN)
 
-.PHONY: all kernel clean modules $(MODULES)
+.PHONY: all kernel kassemble clean modules $(MODULES)
 $(V).SILENT:
-all: kernel modules
-kernel: $(KERNEL_BIN)
+all: kassemble kernel modules 
+kernel: $(KERNEL_IMAGE)
 modules: $(MODULES)
+kassemble: $(KASSEMBLE_BIN)
 $(MODULES): $(MODULE_OBJECTS)
 
 %.o: %.c
@@ -122,6 +130,10 @@ $(MODULES): $(MODULE_OBJECTS)
 	@echo " AS $<"
 	$(CC) $(KERNEL_CFLAGS) -c $< -o $@
 
+$(KASSEMBLE_BIN): $(KASSEMBLE_SRC)
+	@echo " HOSTCC $<"
+	$(CC) -O2 $< -o $@
+
 $(KERNEL_ELF): $(KERNEL_OBJS) $(KERNEL_LD) | $(KERNEL_OUTDIR)/
 	@echo " LD $@"
 	$(LD) $(KERNEL_LD_FLAG) $(KERNEL_OBJS) -o $@
@@ -130,6 +142,10 @@ $(KERNEL_BIN): $(KERNEL_ELF) | $(KERNEL_OUTDIR)/
 	@echo " OBJCOPY $@"
 	$(OBJCOPY) $(KERNEL_OBJCOPY_FLAG) $(KERNEL_ELF) $(KERNEL_BIN)
 
+$(KERNEL_IMAGE): $(KERNEL_BIN) | $(KERNEL_OUTDIR)/
+	@echo " KASSEMBLE $@"
+	$(KASSEMBLE_BIN) $< $@ $$($(NM) $(KERNEL_ELF) | awk '/__image_size/{print $$1}')
+
 clean:
 	@echo " CLEAN $(GENERATED)"
 	$(RM) $(GENERATED)
-- 
cgit v1.2.3