anchao commented on a change in pull request #5645:
URL: https://github.com/apache/incubator-nuttx/pull/5645#discussion_r827076843



##########
File path: arch/arm/src/arm/arm_vectors.S
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@@ -116,7 +116,24 @@ arm_vectorirq:
 #else
        /* Call arm_decodeirq() on the user stack */
 
-       bl      arm_decodeirq           /* Call the handler */
+       mov             r4, sp                  /* Save the SP in a preserved 
register */

Review comment:
       Ok, I will format the code on other change




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