A record store is created in platform-dependent locations, like nonvolatile devicememory, which are not directly exposed to the MIDlets.
记录存储在与平台相关的位置(比如非易失性设备存储器)创建,这些位置不直接公开给MIDlet。
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Within a driver, the mmap function is implemented through the remap_pfn_range kernel function, which provides a linear mapping of devicememory into a user's address space.