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arm64: Fix handling of UXN bit in VMSAv8TranslationMap::Query

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* A clear UXN bit only implies B_EXECUTE_AREA if the page was also
  user-readable.

Change-Id: I01203b6539cc60550a5825c663af5d8cfe57f751
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8423
Haiku-Format: Haiku-format Bot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>
This commit is contained in:
Owen Anderson
2024-09-30 15:48:51 +00:00
committed by waddlesplash
parent f2e8f48cc3
commit 58cef789de
1 changed files with 4 additions and 3 deletions
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src/system/kernel/arch/arm64/VMSAv8TranslationMap.cpp
+4 -3
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@@ -865,13 +865,14 @@ VMSAv8TranslationMap::Query(addr_t va, phys_addr_t* pa, uint32* flags)
if (is_pte_dirty(pte))
*flags |= PAGE_MODIFIED;
if ((pte & kAttrUXN) == 0)
*flags |= B_EXECUTE_AREA;
if ((pte & kAttrPXN) == 0)
*flags |= B_KERNEL_EXECUTE_AREA;
if ((pte & kAttrAPUserAccess) != 0)
if ((pte & kAttrAPUserAccess) != 0) {
*flags |= B_READ_AREA;
if ((pte & kAttrUXN) == 0)
*flags |= B_EXECUTE_AREA;
}
if ((pte & kAttrSWDBM) != 0) {
*flags |= B_KERNEL_WRITE_AREA;