def __init__()

in ArmPlatformPkg/Scripts/Ds5/system_table.py [0:0]

• 23 lines of code
• 8 McCabe index (conditional complexity)

    def __init__(self, ec, membase, memsize):
        self.membase = membase
        self.memsize = memsize
        self.ec = ec

        found = False

        # Start from the top of the memory
        offset = self.membase + self.memsize
        # Align to highest 4MB boundary
        offset = offset & ~0x3FFFFF
        # We should not have a System Table at the top of the System Memory
        offset = offset - 0x400000

        # Start at top and look on 4MB boundaries for system table ptr structure
        while offset > self.membase:
            try:
                signature = struct.unpack("cccccccc", self.ec.getMemoryService().read(str(offset), 8, 32))
            except DebugException:
                raise Exception('SystemTable','Fail to access System Memory. Ensure all the memory in the region [0x%x;0x%X] is accessible.' % (membase,membase+memsize))
            if signature == SystemTable.CONST_ST_SIGNATURE:
                found = True
                if edk2_debugger.is_aarch64(self.ec):
                    self.system_table_base = self.ec.getMemoryService().readMemory64(offset + 0x8)
                else:
                    self.system_table_base = self.ec.getMemoryService().readMemory32(offset + 0x8)
                break
            offset = offset - 0x400000

        if not found:
            raise Exception('SystemTable','System Table not found in System Memory [0x%x;0x%X]' % (membase,membase+memsize))