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Note that not all MOP.RR.7 or MOP.R.28 encodings are used for Zicfiss #215

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Mar 21, 2024
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Note that not all MOP.RR.7 or MOP.R.28 encodings are used for Zicfiss #215

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Note that not all MOP.RR.7 or MOP.R.28 encodings are used for Zicfiss
ved-rivos Mar 18, 2024
d5d6dcb
Note that not all MOP.RR.7 or MOP.R.28 encodings are used for Zicfiss
ved-rivos Mar 18, 2024
b3ce586
update wording
ved-rivos Mar 18, 2024
8f55ef5
update text
ved-rivos Mar 19, 2024
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8 changes: 4 additions & 4 deletions src/cfi_backward.adoc
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Expand Up @@ -98,10 +98,10 @@ The Zicfiss extension introduces the following instructions:
* Perform an atomic swap from a shadow stack location (See <<SSAMOSWAP>>)
** `SSAMOSWAP.W` and `SSAMOSWAP.D`

When a `MOP.RR.7` or `MOP.R.28` encoding is not utilized by the Zicfiss
extension, the instruction adheres to its Zimop-defined behavior, unless it is
employed by another extension. In such cases, the instruction follows the
behavior specified by that other extension.
Zicfiss does not use all encodings of `MOP.RR.7` or `MOP.R.28`. When a
`MOP.RR.7` or `MOP.R.28` encoding is not utilized by the Zicfiss extension, the
corresponding instruction adheres to its Zimop-defined behavior, unless
redefined by another extension.

If a shadow stack (SS) instruction raises an access-fault, page-fault, or
guest-page-fault exception that is supposed to indicate the original instruction
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