Kernel build: enter exception save sp_sl0,exit exception restroe sp_el0

Signed-off-by: lipengfei28 <[email protected]>
tiiuae · Oct 2, 2024 · 8e200e6 · 8e200e6
1 parent c3da7c2
commit 8e200e6
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/arch/arm64/src/common/arm64_vector_table.S b/arch/arm64/src/common/arm64_vector_table.S
@@ -78,6 +78,10 @@
 #endif
     stp    \xreg0, \xreg1,  [sp, #8 * REG_ELR]
 
+    mrs    \xreg0, sp_el0
+    mrs    \xreg1, tpidrro_el0
+    stp    \xreg0, \xreg1,  [sp, #8 * REG_SP_EL0]
+
     /* Increment exception depth */
 
     mrs    \xreg0, tpidrro_el0
@@ -261,6 +265,10 @@ SECTION_FUNC(text, arm64_exit_exception)
     msr    spsr_el1,  x1
 #endif
 
+    ldp    x0, x1,   [sp, #8 * REG_SP_EL0]
+    msr    sp_el0,   x0
+    msr    tpidrro_el0,  x1
+
     /* decrement exception depth */
 
     mrs    x0, tpidrro_el0