add label in ch2/sec4

e88f557b · chyyuu1972 · d95b158f · e88f557b
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source/chapter2/4trap-handling.rst source/chapter2/4trap-handling.rst +2 -0

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--- a/source/chapter2/4trap-handling.rst
+++ b/source/chapter2/4trap-handling.rst
+.. _term-trap-handle:
+
 实现特权级的切换
 ===========================