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[LibOS] VMA bookkeep calls Pal mprotect per VMA #1824

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[LibOS] VMA bookkeep calls Pal mprotect per VMA #1824

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Commits on Mar 21, 2024

  1. [LibOS] VMA bookkeep calls Pal mprotect per VMA 

    VMA bookkeeping records prot of each VMA. However `mprotect` syscall always
calls Pal `mprotect` no matter prot changed or not.
This commit updates VMA bookkeep `mprotect` to walk through VMAs and only call
Pal `mprotect` when prot changed, and also fixes prot mismatch exceptions.

Signed-off-by: Li, Xun <[email protected]>

Signed-off-by: xiaonan-INTC <[email protected]>
    @llly
    llly committed Mar 21, 2024
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