From ac1455d3ba2339f7674e4444006b028cf8bafe68 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gbeutner@serenityos.org>
Date: Tue, 20 Jul 2021 02:34:02 +0200
Subject: [PATCH] Kernel: Specify protection flags for ELF load headers

These are currently unused by the prekernel and ld used the same flags
by default - except for the .ksyms section which was marked as
read-write.
---
 Kernel/linker.ld | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Kernel/linker.ld b/Kernel/linker.ld
index 18db2e42da..2ec733f082 100644
--- a/Kernel/linker.ld
+++ b/Kernel/linker.ld
@@ -8,15 +8,19 @@ ENTRY(init)
 #    define KERNEL_BASE 0x2000000000
 #endif
 
+#define PF_X 0x1
+#define PF_W 0x2
+#define PF_R 0x4
+
 KERNEL_VIRTUAL_BASE = KERNEL_BASE;
 
 PHDRS
 {
-  super_pages PT_LOAD ;
-  text PT_LOAD ;
-  data PT_LOAD ;
-  bss PT_LOAD ;
-  ksyms PT_LOAD ;
+  super_pages PT_LOAD FLAGS(PF_R | PF_W) ;
+  text PT_LOAD FLAGS(PF_R | PF_X) ;
+  data PT_LOAD FLAGS(PF_R | PF_W) ;
+  bss PT_LOAD FLAGS(PF_R | PF_W) ;
+  ksyms PT_LOAD FLAGS(PF_R) ;
 }
 
 SECTIONS