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diff --git a/sys/arm64/arm64/exception.S b/sys/arm64/arm64/exception.S
--- a/sys/arm64/arm64/exception.S
+++ b/sys/arm64/arm64/exception.S
@@ -42,7 +42,6 @@
*/
.macro save_registers_head el
.if \el == 1
- mov x18, sp
stp x0, x1, [sp, #(TF_X - TF_SIZE - 128)]!
.else
stp x0, x1, [sp, #(TF_X - TF_SIZE)]!
@@ -61,7 +60,9 @@
stp x24, x25, [sp, #(24 * 8)]
stp x26, x27, [sp, #(26 * 8)]
stp x28, x29, [sp, #(28 * 8)]
-.if \el == 0
+.if \el == 1
+ add x18, sp, #-(TF_X - TF_SIZE - 128)
+.else
mrs x18, sp_el0
.endif
mrs x10, elr_el1

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