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Kernel: Crash on memory access in non-readable regions
This patch makes it possible to make memory regions non-readable. This is enforced using the "present" bit in the page tables. A process that hits an not-present page fault in a non-readable region will be crashed.
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5 changed files with 41 additions and 2 deletions
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@ -113,6 +113,14 @@ public:
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m_access &= ~Access::Write;
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}
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void set_readable(bool b)
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{
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if (b)
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m_access |= Access::Read;
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else
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m_access &= ~Access::Read;
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}
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void map(PageDirectory&);
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enum class ShouldDeallocateVirtualMemoryRange {
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No,
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