lunaix-os/scripts/gdb/lunadbg/structs/page.py

   1 from gdb import Type, Value, lookup_type
   2 from . import KernelStruct
   3
   4 class PageStruct(KernelStruct):
   5     def __init__(self, gdb_inferior: Value) -> None:
   6         super().__init__(gdb_inferior, PageStruct)
   7         self.ref = self._kstruct["refs"]
   8         self.type = self._kstruct["type"]
   9         self.flags = self._kstruct["flags"]
  10         self.order = self._kstruct["order"]
  11         self.pool = self._kstruct["pool"]
  12         self.companion = self._kstruct["companion"]
  13
  14     def uninitialized(self):
  15         return not (self.flags & 0b10)
  16
  17     def reserved(self):
  18         return (not self.uninitialized()
  19                 and self.type == 0b1000
  20                 and self.ref  == 0xf0f0f0f0)
  21
  22     def busy(self):
  23         return (not self.uninitialized()
  24                 and self.type != 0b1000
  25                 and self.ref > 0)
  26
  27     def lead_page(self):
  28         return self.companion == 0 and not self.uninitialized()
  29
  30     @staticmethod
  31     def get_type() -> Type:
  32         return lookup_type("struct ppage").pointer()
  33