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Memory channel is created by updating trustlet2's PGD entry for the output so that it points to the trustlet1's PUD entry for the input Example: <Before creating channel> - Trustlet1 CR3 -> PGD [OUTPUT_VADDR] -> <PUD A> -> ... - Trustlet2 CR3 -> PGD [INPUT_VADDR] -> <PUD B> -> ... // change trustlet2's PGD entry of INPUT_VADDR to point to trustlet1's output channel <After creating channel> - Trustlet2 CR3 -> PGD [INPUT_VADDR] -> <PUD A> ->
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Summary
Memory channel is created by updating trustlet2's PGD entry for the output so that it points to the trustlet1's PUD entry for the input
Example:
Test
./module/libwallet/test_channel.py./module/libwallet/externel/channel_test(compilation is needed)Note