From 657cbdedb6edeec1340fa36b501c3b2e9fc6df0a Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Mon, 30 Aug 2021 12:54:55 +0000
Subject: x86/boot: add asm routine for entering the kernel

---
 arch/x86/boot/kernel_entry.s | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 arch/x86/boot/kernel_entry.s

diff --git a/arch/x86/boot/kernel_entry.s b/arch/x86/boot/kernel_entry.s
new file mode 100644
index 0000000..e0fd132
--- /dev/null
+++ b/arch/x86/boot/kernel_entry.s
@@ -0,0 +1,12 @@
+# bootsect.s loads the kernel and transfers control to SYSSEG address.
+# We cannot be sure that the main() function will be exactly at this
+# address.
+
+# Therefore, we will use a small trick for entering the kernel correctly:
+# Locate this small assembly routine at the beginning of the SYSSEG
+# address => we can be sure that control will transfer to main()
+
+.code32
+.extern kernel_main
+	call kernel_main
+	jmp .
-- 
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