fix-broken-windows.patch

From 934c3b1a8ef95a5f613d88b39248065e298723f7 Mon Sep 17 00:00:00 2001
From: Marcell Haritopoulos <marcellharitopoulos@gmail.com>
Date: Thu, 18 Aug 2016 20:50:49 +0200
Subject: [PATCH 1/2] Initialize page table after allocating it

---
 selfie.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/selfie.c b/selfie.c
index ac2d478cbc17d06..5efa7067170e236 100644
--- a/selfie.c
+++ b/selfie.c
@@ -6339,6 +6339,7 @@ int createID(int seed) {
 
 int* allocateContext(int ID, int parentID) {
   int* context;
+  int page;
 
   if (freeContexts == (int*) 0)
     context = malloc(4 * SIZEOFINTSTAR + 6 * SIZEOFINT);
@@ -6362,9 +6363,15 @@ int* allocateContext(int ID, int parentID) {
   setRegHi(context, 0);
   setRegLo(context, 0);
 
-  // allocate memory for page table
+  // allocate and initialize memory for page table
   // TODO: save and reuse memory for page table
   setPT(context, malloc(VIRTUALMEMORYSIZE / PAGESIZE * WORDSIZE));
+  page = 0;
+  while (page < VIRTUALMEMORYSIZE / PAGESIZE)
+  {
+      *(getPT(context) + page) = 0;
+      page = page + 1;
+  }
 
   // heap starts where it is safe to start
   setBreak(context, maxBinaryLength);
@@ -6693,4 +6700,4 @@ int main(int argc, int* argv) {
   }
 
   return 0;
-}
\ No newline at end of file
+}
-- 
2.9.3


From c32125bfcb4076871201da9f049334a7e45286ae Mon Sep 17 00:00:00 2001
From: Marcell Haritopoulos <marcellharitopoulos@gmail.com>
Date: Thu, 18 Aug 2016 22:50:23 +0200
Subject: [PATCH 2/2] Initialize ZR to 0 after allocating it

---
 selfie.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/selfie.c b/selfie.c
index 5efa7067170e236..bd9f49a7b0b3dd6 100644
--- a/selfie.c
+++ b/selfie.c
@@ -6362,6 +6362,7 @@ int* allocateContext(int ID, int parentID) {
 
   setRegHi(context, 0);
   setRegLo(context, 0);
+  *(getRegs(context)+REG_ZR) = 0;
 
   // allocate and initialize memory for page table
   // TODO: save and reuse memory for page table
-- 
2.9.3