3 files changed, 82 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
new file mode 100644
index 0000000..36cca4c
--- /dev/null
+++ b/kernel/Makefile
@@ -0,0 +1,40 @@
+include ../defaults.mk
+
+TARGET := kernel.os
+.DEFAULT: $(TARGET)
+
+# EFI API for temporary things
+
+EFIAPIDIR := /usr/local/include/efi
+
+CPPFLAGS += -I../api -I$(EFIAPIDIR) -I$(EFIAPIDIR)/$(ARCH) -I$(EFIAPIDIR)/protocol
+CFLAGS += -Wno-unused-const-variable -Wno-unused-function -fvisibility=hidden -g
+
+LIBDIRS += -L$(dir $(shell $(CC) -print-libgcc-file-name))
+LDSCRIPT := kernel.ld
+LDFLAGS += -z max-page-size=4096 --export-dynamic
+LOADLIBES := -lgcc
+
+SOBJS := 
+GOBJS := entry_efi.o
+IOBJS :=
+
+$(SOBJS): CFLAGS += -fPIC
+# __attribute__((interrupt)) requires -mgeneral-regs-only
+$(IOBJS): CFLAGS += -mgeneral-regs-only
+$(IOBJS) $(GOBJS): CFLAGS += -mcmodel=kernel
+
+OBJS := $(SOBJS) $(GOBJS) $(IOBJS)
+DEPS := $(patsubst %.o,%.d,$(OBJS))
+
+$(TARGET): $(LDSCRIPT) $(MAKEFILE_LIST)
+$(TARGET): $(OBJS)
+
+CLEANLIST := $(wildcard $(OBJS) $(TARGET)) 
+DCLEANLIST := $(wildcard $(DEPS))
+
+include ../rules.mk
+-include $(DEPS)
+
+.DEFAULT: $(TARGET)
+
diff --git a/kernel/entry_efi.c b/kernel/entry_efi.c
new file mode 100644
index 0000000..1acd399
--- /dev/null
+++ b/kernel/entry_efi.c
@@ -0,0 +1,14 @@
+#include <stdbool.h>
+#include <stdnoreturn.h>
+
+#include <boot/entry/entry_efi.h>
+
+static const char kernel_entry_data[4096];
+
+noreturn void kernel_entry(struct efi_boot_data *data)
+{
+    (void)data;
+    __asm__ ("cli\n\t");
+    while (true) __asm__ ("hlt\n\t");
+}
+
diff --git a/kernel/kernel.ld b/kernel/kernel.ld
new file mode 100644
index 0000000..9538056
--- /dev/null
+++ b/kernel/kernel.ld
@@ -0,0 +1,28 @@
+ENTRY(kernel_entry)
+
+SECTIONS
+{
+    . = SIZEOF_HEADERS;
+
+    .text 0 :
+    {
+        *(.text)
+    } =0x90
+
+    .data : ALIGN(4K)
+    {
+        *(.rodata)
+        *(.data)
+    }
+
+    .bss :
+    {
+        *(.bss)
+    }
+
+    /DISCARD/ :
+    {
+        *(.eh_frame)
+    }
+}
+