From f8529d09bf1555c2dda61f5841b7ad4f42ce9715 Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Thu, 17 Apr 2025 13:44:55 -0400
Subject: elf sym loading

---
 Makefile | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 58 insertions(+), 15 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 52135b9..bb4380c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,45 +3,88 @@
 .PHONY: build fmt clean qemu
 .SILENT:
 
+AS ?= as
+CC ?= cc
+LD ?= ld
+CPP ?= cpp
+
+CPPFLAGS += -Ikernel/include
+
+CFLAGS += -O0
+CFLAGS += -std=c11
+CFLAGS += -Wall -Wextra -pedantic
+CFLAGS += -fno-pie -fno-stack-protector
+CFLAGS += -fno-omit-frame-pointer -ffreestanding
+CFLAGS += -fno-builtin
+CFLAGS += -D DEBUG -g
+CFLAGS += $(CPPFLAGS)
+
+LDFLAGS += -nmagic --no-warn-rwx-segments -nostdlib -E
+
+SRC=kernel
+BIN=bin
+KERNEL=kernel.bin
+ISO=os.iso
+
+H_SRC = $(shell find $(SRC) -type f -name "*.h")
+A_SRC = $(shell find $(SRC) -type f -name "*.S")
+A_OBJ = $(patsubst %.S,$(BIN)/%.S.o,$(A_SRC))
+C_SRC = $(shell find $(SRC) -type f -name "*.c")
+C_OBJ = $(patsubst %.c,$(BIN)/%.o,$(C_SRC))
+
 UNAME := $(shell uname)
 
 QEMU = qemu-system-x86_64
-QEMUOPTS = -cdrom bin/os.iso \
+QEMUOPTS = -cdrom $(BIN)/$(ISO) \
 		   -no-reboot \
 		   -serial mon:stdio \
 		   -m 4G \
 		   -name kern
 
-qemu: bin/os.iso
+qemu: $(BIN)/$(ISO)
 	$(QEMU) $(QEMUOPTS)
 
-qemu-kvm: bin/os.iso
+qemu-kvm: $(BIN)/$(ISO)
 	$(QEMU) -cpu host --enable-kvm $(QEMUOPTS)
 
-qemu-nox: bin/os.iso
+qemu-nox: $(BIN)/$(ISO)
 	$(QEMU) $(QEMUOPTS) -nographic
 
-qemu-gdb: bin/os.iso
+qemu-gdb: $(BIN)/$(ISO)
 	$(QEMU) $(QEMUOPTS) -S -gdb tcp::1337
 
-qemu-gdb-nox: bin/os.iso
+qemu-gdb-nox: $(BIN)/$(ISO)
 	$(QEMU) $(QEMUOPTS) -nographic -S -gdb tcp::1337
 
 gdb:
 	gdb -q -n -x config/gdbinit
 
 clean:
-	rm -fr .zig-cache
-	rm -fr bin
+	rm -fr $(BIN)
+
+build: $(BIN)/$(ISO)
+
+$(A_OBJ): $(BIN)/%.S.o : %.S
+	mkdir -p $(@D)
+	printf "\033[33m  AS  \033[0m%s\n" $<
+	$(CPP) $(CPPFLAGS) -o $@.cpp $<
+	$(AS) -o $@ $@.cpp
+
+$(C_OBJ): $(BIN)/%.o : %.c
+	mkdir -p $(@D)
+	printf "\033[34m  CC  \033[0m%s\n" $<
+	$(CC) -c $(CFLAGS) -o $@ $<
 
-build:
-	zig build
+$(BIN)/$(KERNEL): $(C_OBJ) $(A_OBJ)
+	mkdir -p $(@D)
+	printf "\033[32m  LD  \033[0m%s\n" $@
+	$(LD) $(LDFLAGS) -T config/kernel.ld -o $(BIN)/$(KERNEL) $(A_OBJ) $(C_OBJ)
 
-bin/os.iso: build
-	mkdir -p bin/iso/boot/grub
-	cp config/grub.cfg bin/iso/boot/grub
-	cp bin/kernel bin/iso/boot
-	grub-mkrescue -o bin/os.iso bin/iso 2>/dev/null
+$(BIN)/$(ISO): $(BIN)/$(KERNEL)
+	mkdir -p $(BIN)/iso/boot/grub
+	cp config/grub.cfg $(BIN)/iso/boot/grub
+	cp $(BIN)/$(KERNEL) $(BIN)/iso/boot
+	grub-mkrescue -o $(BIN)/$(ISO) bin/iso 2>/dev/null
 
 fmt:
 	clang-format -i $(shell find -type f -name "*.[ch]" -and -not -path "./kernel/old/*")
-- 
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