7.6.1. Cancelling an exception return

For ARMv7-M processors, a cancelling exception cancels the most recently traced instruction or exception return packet. This is important when tail chaining exceptions.

For ARMv7-A/R processors, a cancelling exception cancels the most recently traced instruction. If there has been an exception return packet since that instruction then this packet is also canceled and is not treated as a separate event from the traced instruction.

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