Kernel/aarch64: Make REGISTER_STATE_SIZE a multiple of 16 bytes

This ensure that the stack pointer also stays 16 byte aligned. This fixes a baremetal issue when getting an exception.
cubiclove · May 15, 2023 · 55e8ffd · 55e8ffd
1 parent 65ed541
commit 55e8ffd
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/Kernel/Arch/aarch64/vector_table.S b/Kernel/Arch/aarch64/vector_table.S
@@ -6,7 +6,13 @@
 
 .section .text.vector_table
 
-#define REGISTER_STATE_SIZE 264
+// NOTE: This size must be a multiple of 16 bytes, to ensure that the stack pointer
+// stays 16 byte aligned.
+#define REGISTER_STATE_SIZE 272
+#if REGISTER_STATE_SIZE % 16 != 0
+# error "REGISTER_STATE_SIZE is not a multiple of 16 bytes!"
+#endif
+
 #define SPSR_EL1_SLOT (31 * 8)
 #define ELR_EL1_SLOT (32 * 8)
 #define SP_EL0_SLOT (33 * 8)