initial commit

kernel-src/Makefile

@@ -0,0 +1,18 @@
+CSOURCES= $(shell find -name *.c)
+ASMSOURCES= $(shell find -name *.asm)
+OBJS=$(CSOURCES:.c=.o) $(ASMSOURCES:.asm=.asmo)
+TARGET=x86-64
+INCDIR=$(shell pwd)/include
+ARCHDIR=$(shell pwd)/arch/$(TARGET)/
+LDFLAGS=-ffreestanding -nostdlib -lgcc -Wl,-T,"$(ARCHDIR)/kernel.ld" -debug
+CFLAGS=-ffreestanding -mcmodel=kernel -O2 -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -nostdlib -nostdinc -I "${INCDIR}"
+ASFLAGS=-felf64
+
+astral:	$(OBJS)
+	$(LD) $(LDFLAGS) -o $@ $^
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+%.asmo: %.asm
+	nasm $(ASFLAGS) -o $@ $<

kernel-src/arch/x86-64/kernel.ld

@@ -0,0 +1,45 @@
+OUTPUT_FORMAT(elf64-x86-64)
+OUTPUT_ARCH(i386:x86-64)
+
+ENTRY(kernel_entry)
+
+PHDRS
+{
+	text PT_LOAD FLAGS((1 << 0) | (1 <<2)) ;
+	rodata PT_LOAD FLAGS((1 << 2)) ;
+	data PT_LOAD FLAGS((1 << 1) | (1 << 2));
+}
+
+SECTIONS
+{
+	. = 0xffffffff80000000;
+	_text_start = .;
+
+	.text : {
+		*(.text .text.*);
+	} :text
+
+	. = ALIGN(4K);
+	_text_end = .;	
+	_rodata_start = .;
+	.rodata : {
+		*(.rodata .rodata.*);
+	} :rodata
+
+	. = ALIGN(4K);
+	_rodata_end = .;
+	_data_start = .;
+
+	data : {
+		*(.data .data.*);
+	} :data
+	
+	.bss : {
+		*(COMMON)
+		*(.bss .bss.*)
+	} :data
+	
+	. = ALIGN(4K);
+
+	_data_end = .;
+}

kernel-src/arch/x86-64/main.c

@@ -0,0 +1,4 @@
+void kernel_entry() {
+	asm("cli");
+	asm("hlt");
+}