From ce8c66f93afdda29e776f5860e25ecab4e74839f Mon Sep 17 00:00:00 2001
From: Rafal Kupiec <belliash@codingworkshop.eu.org>
Date: Sun, 24 Mar 2024 22:52:18 +0100
Subject: [PATCH] Always map first page

---
 xtldr/memory.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xtldr/memory.c b/xtldr/memory.c
index 72bf476..bcdeaac 100644
--- a/xtldr/memory.c
+++ b/xtldr/memory.c
@@ -355,6 +355,14 @@ BlMapEfiMemory(IN OUT PXTBL_PAGE_MAPPING PageMap,
         }
     }
 
+    /* Always map first page */
+    Status = BlMapVirtualMemory(PageMap, NULL, (PVOID)0, 1, LoaderFirmwarePermanent);
+    if(Status != STATUS_EFI_SUCCESS)
+    {
+        /* Mapping failed */
+        return Status;
+    }
+
     /* Map BIOS ROM and VRAM */
     Status = BlMapVirtualMemory(PageMap, NULL, (PVOID)0xA0000, 0x60, LoaderFirmwarePermanent);
     if(Status != STATUS_EFI_SUCCESS)