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Incorrect mstatus Setting for Non-Existent CSR Access in M-Mode #216

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youzi27 opened this issue Nov 21, 2024 · 0 comments
Open

Incorrect mstatus Setting for Non-Existent CSR Access in M-Mode #216

youzi27 opened this issue Nov 21, 2024 · 0 comments

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@youzi27
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youzi27 commented Nov 21, 2024

Describe the bug

When accessing a specific non-existent CSR (e.g., 0xb7d) in M-mode, NutShell sets the mstatus register incorrectly, while other CSRs such as mepc and mcause remain consistent with Spike. Upon reviewing the NutShell source code CSR, there is no evidence of a custom implementation for this CSR.

Steps to Reproduce

  1. Enter M-mode.
  2. Attempt to access a non-existent CSR, such as 0xb7d.
  3. Compare the behavior of NutShell's CSRs.

Screenshots

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@youzi27