diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..20596b5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+*.elf
diff --git a/Makefile b/Makefile
index 7b917e5..fc77b16 100644
--- a/Makefile
+++ b/Makefile
@@ -1,2 +1,36 @@
+BUILDDIR = build
+
+all: githooks $(BUILDDIR)/kernel.elf
+
 githooks: | hooks
 	@git config core.hooksPath hooks/
+
+$(BUILDDIR):
+	@mkdir $(BUILDDIR)
+
+clean:
+	@$(RM) -rf $(BUILDDIR)
+
+CC = $(CROSS_PREFIX)gcc
+
+SRCS = $(wildcard src/*.S src/*.c)
+OBJS = $(patsubst src/%.S,$(BUILDDIR)/%.o,$(SRCS))
+OBJS := $(patsubst src/%.c,$(BUILDDIR)/%.o,$(OBJS))
+
+CFLAGS = -I include/ -mcmodel=medany
+LDFLAGS = -ffreestanding -nostdlib
+
+$(BUILDDIR)/%.o: src/%.S | $(BUILDDIR)
+	@printf "  CCAS\t$(@F)\n"
+	@$(CC) $< -c -o $@ $(CFLAGS)
+
+$(BUILDDIR)/%.o: src/%.c | $(BUILDDIR)
+	@printf "  CC\t$(@F)\n"
+	@$(CC) $< -c -o $@ $(CFLAGS)
+
+$(BUILDDIR)/kernel.elf: $(OBJS) kernel.ld | $(BUILDDIR)
+	@printf "  CCLD\t$(@F)\n"
+	@$(CC) $(OBJS) -o $@ -T kernel.ld $(LDFLAGS)
+
+run: $(BUILDDIR)/kernel.elf
+	@qemu-system-riscv64 -M virt -nographic -kernel $<
diff --git a/include/attribs.h b/include/attribs.h
new file mode 100644
index 0000000..c4c0ec7
--- /dev/null
+++ b/include/attribs.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#include <stdnoreturn.h>
diff --git a/include/config.h b/include/config.h
new file mode 100644
index 0000000..cb1df71
--- /dev/null
+++ b/include/config.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define KSTACK_BASE 0x88000000
diff --git a/include/types.h b/include/types.h
new file mode 100644
index 0000000..1060720
--- /dev/null
+++ b/include/types.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef int8_t i8;
+typedef int16_t i16;
+typedef int32_t i32;
+typedef int64_t i64;
+
+typedef uintptr_t usize;
+typedef intptr_t ssize;
diff --git a/kernel.ld b/kernel.ld
new file mode 100644
index 0000000..c65a0b9
--- /dev/null
+++ b/kernel.ld
@@ -0,0 +1,33 @@
+ENTRY(_start)
+
+SECTIONS {
+    . = 0x80200000;
+
+    .init : {
+        *(.init .init.*)
+    }
+
+    .text : {
+        *(.text .text.*)
+    }
+
+    .rodata : {
+        *(.rodata .rodata.*)
+    }
+
+    .data : {
+        *(.data .data.*)
+    }
+
+    .sdata : {
+        *(.sdata .sdata.*)
+    }
+
+    .sbss : {
+        *(.sbss .sbss.*)
+    }
+
+    .bss : {
+        *(.bss .bss.*)
+    }
+}
diff --git a/src/entry.S b/src/entry.S
new file mode 100644
index 0000000..e7bd246
--- /dev/null
+++ b/src/entry.S
@@ -0,0 +1,8 @@
+#include <config.h>
+
+    .section .init
+
+    .global _start
+_start:
+    li sp, KSTACK_BASE
+    tail kmain
diff --git a/src/kmain.c b/src/kmain.c
new file mode 100644
index 0000000..d3d4ee8
--- /dev/null
+++ b/src/kmain.c
@@ -0,0 +1,13 @@
+#include <attribs.h>
+#include <types.h>
+
+noreturn void kmain(void) {
+    volatile u8 *uart = (volatile u8 *) 0x10000000;
+    const char *s = "Hello, world!\n";
+
+    for (int i = 0; s[i] != '\0'; i++)
+        *uart = s[i];
+
+    while (true)
+        ;
+}