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Kernel/aarch64: Disable memory access alignment check

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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.
This commit is contained in:
Timon Kruiper 2023-02-18 11:08:02 +01:00 committed by Jelle Raaijmakers
parent 5d587ea562
commit 13f5aa81e3
1 changed files with 4 additions and 1 deletions
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5
Kernel/Arch/aarch64/Exceptions.cpp
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@ -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);