CSR: write tval according to the trap target privilege - #278
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Page-fault and misaligned traps wrote mtval/stval from the privilege at the fault, so an S-mode exception that was not delegated still updated stval. Write the register of the privilege that takes the trap: medeleg(cause) && privilegeMode < M selects stval, otherwise mtval.
poemonsense
approved these changes
Sep 20, 2026
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Page-fault and misaligned traps wrote mtval/stval from the privilege at the fault, so an S-mode exception that was not delegated still updated stval.
Write the register of the privilege that takes the trap: medeleg(cause) && privilegeMode < M selects stval, otherwise mtval.