Kernel/aarch64: Disable memory access alignment check

Even though we currently build all of Userland and the Kernel with the
-mstrict-align flag, the compiler will still emit unaligned memory
accesses. To work around this, we disable the check for now. See
https://github.com/SerenityOS/serenity/issues/17516 for the relevant
issue.

1 files changed, 4 insertions, 1 deletions

diff --git a/Kernel/Arch/aarch64/Exceptions.cpp b/Kernel/Arch/aarch64/Exceptions.cpp
index af95df6d85..8b6005fbed 100644
--- a/Kernel/Arch/aarch64/Exceptions.cpp
+++ b/Kernel/Arch/aarch64/Exceptions.cpp
@@ -74,7 +74,10 @@ static void setup_el1()
     system_control_register_el1.UMA = 1;  // Don't trap access to DAIF (debugging) flags of EFLAGS register
     system_control_register_el1.SA0 = 1;  // Enable stack access alignment check for EL0
     system_control_register_el1.SA = 1;   // Enable stack access alignment check for EL1
-    system_control_register_el1.A = 1;    // Enable memory access alignment check
+
+    // FIXME: Enable memory access alignment check when userspace will not execute unaligned memory accesses anymore.
+    //        See: https://github.com/SerenityOS/serenity/issues/17516
+    system_control_register_el1.A = 0; // Disable memory access alignment check
 
     Aarch64::SCTLR_EL1::write(system_control_register_el1);