X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/92f6e64a6da763c45ff9f4ab5eafcab3d8766dcb..b60166b327a9108b07e3069fa6568a451529ffd9:/lunaix-os/scripts/gdb/lunadbg/arch/x86/pte.py

diff --git a/lunaix-os/scripts/gdb/lunadbg/arch/x86/pte.py b/lunaix-os/scripts/gdb/lunadbg/arch/x86/pte.py
new file mode 100644
index 0000000..5785376
--- /dev/null
+++ b/lunaix-os/scripts/gdb/lunadbg/arch/x86/pte.py
@@ -0,0 +1,101 @@
+class PageTableHelperBase:
+    @staticmethod
+    def null_mapping(pte):
+        return pte == 0
+    
+    @staticmethod
+    def translation_level(level=-1):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def translation_shift_bits(level):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def mapping_present(pte):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def huge_page(pte):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def protections(pte):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def other_attributes(level, pte):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def same_kind(pte1, pte2):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def physical_pfn(pte):
+        raise NotImplementedError()
+    
+    @staticmethod
+    def vaddr_width():
+        raise NotImplementedError()
+
+class PageTableHelper32(PageTableHelperBase):
+    @staticmethod
+    def translation_level(level = -1):
+        return [0, 1][level]
+    
+    @staticmethod
+    def translation_shift_bits(level):
+        return [9, 0][level] + 12
+    
+    @staticmethod
+    def mapping_present(pte):
+        return bool(pte & 1)
+    
+    @staticmethod
+    def huge_page(pte):
+        return bool(pte & (1 << 7))
+    
+    @staticmethod
+    def protections(pte):
+        prot = ['R'] # RWXUP
+        if (pte & (1 << 1)):
+            prot.append('W')
+        if (pte & -1):
+            prot.append('X')
+        if (pte & (1 << 2)):
+            prot.append('U')
+        if (pte & (1)):
+            prot.append('P')
+        return prot
+    
+    @staticmethod
+    def other_attributes(level, pte):
+        attrs = []
+        if pte & (1 << 5):
+            attrs.append("A")
+        if pte & (1 << 6):
+            attrs.append("D")
+        if pte & (1 << 3):
+            attrs.append("PWT")
+        if pte & (1 << 4):
+            attrs.append("PCD")
+        if PageTableHelper32.translation_level(level) == 1 and pte & (1 << 8):
+            attrs.append("G")
+        return attrs
+    
+    @staticmethod
+    def same_kind(pte1, pte2):
+        attr_mask = 0x19f  # P, R/W, U/S, PWT, PCD, PS, G
+        return (pte1 & attr_mask) == (pte2 & attr_mask)
+    
+    @staticmethod
+    def physical_pfn(pte):
+        return pte >> 12
+    
+    @staticmethod
+    def vaddr_width():
+        return 32
+
+class PageTableHelper64(PageTableHelperBase):
+    pass
\ No newline at end of file