From 35cf8aada4f9f04eb2c57f095d8c83688ee46f52 Mon Sep 17 00:00:00 2001
From: Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
Date: Mon, 7 Mar 2022 15:30:10 +0100
Subject: [PATCH] lx_emul(x86): fill zero page with zeroes

Ref #4397
---
 repos/dde_linux/src/lib/lx_emul/spec/x86/start.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/repos/dde_linux/src/lib/lx_emul/spec/x86/start.c b/repos/dde_linux/src/lib/lx_emul/spec/x86/start.c
index 1566ae7878..4c6b26c2f3 100644
--- a/repos/dde_linux/src/lib/lx_emul/spec/x86/start.c
+++ b/repos/dde_linux/src/lib/lx_emul/spec/x86/start.c
@@ -30,4 +30,12 @@ void time_init(void)
 }
 
 
-void lx_emul_setup_arch(void *dtb) { }
+#include <asm/pgtable.h>
+
+unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
+
+void lx_emul_setup_arch(void *dtb)
+{
+	/* fill zero page */
+	memset(empty_zero_page, 0, PAGE_SIZE);
+}