1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/boot/head.s b/arch/x86/boot/head.s
new file mode 100644
index 0000000..a1bc6d1
--- /dev/null
+++ b/arch/x86/boot/head.s
@@ -0,0 +1,27 @@
+/*
+	head.s is loaded at 0x1000 (by second stage), its main goal
+	is run 32-bit startup code.
+
+	After that manipulations it jumps to kernel written by C
+*/
+
+.code32							# Tell GAS to generate 32 bit code
+.extern kernel_main
+
+.set CODESEG, 0x08
+.set DATASEG, 0x10
+
+.global _start
+_start:
+	mov $DATASEG, %ax			# Point segment registers to the
+	mov %ax, %ds				# data selector we defined in our GDT
+	mov %ax, %es
+	mov %ax, %ss
+	mov %ax, %fs
+	mov %ax, %gs
+
+	mov $0x90000, %ebp			# Update stack position so it is right
+	mov %ebp, %esp				# at the top of the free space.
+
+	call kernel_main
+	jmp . 						# infinite loop