From 659cd8adbd940c4a7566cdc4a461ba05b5d2177c Mon Sep 17 00:00:00 2001
From: johannst <johannes.stoelp@gmail.com>
Date: Sun, 30 May 2021 02:03:21 +0200
Subject: added long mode example with 4 level paging

---
 guest/guest64.S | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 guest/guest64.S

(limited to 'guest/guest64.S')

diff --git a/guest/guest64.S b/guest/guest64.S
new file mode 100644
index 0000000..1862749
--- /dev/null
+++ b/guest/guest64.S
@@ -0,0 +1,17 @@
+.intel_syntax noprefix
+
+.section .boot, "ax", @progbits
+    // Trigger `KVM_EXIT_IO:KVM_EXIT_IO_OUT` by writing string to output port.
+    mov rdx, 0x1000             // Output port.
+    lea rsi, [rip + msg]        // Address of string.
+    mov rcx, [rip + msg_len]    // Len of string.
+    rep outsb                   // Write ds:rsi to output port rdx.
+
+    // Trigger `KVM_EXIT_HLT`.
+    hlt
+
+.section .rodata, "a", @progbits
+msg:
+    .asciz "Hello from Long Mode!\n"
+msg_len:
+    .byte .-msg
-- 
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