|  | Default (and possibly architecture dependents) HAL modules go here. | 
|  |  | 
|  |  | 
|  | libhardware.so eventually should contain *just* the HAL hub | 
|  | (hardware.c), everything in it should be rewritten as modules. | 
|  |  | 
|  | Modules are .so in /system/libs/hw/ and have a well defined naming | 
|  | convention: | 
|  |  | 
|  | /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.product.board>.so | 
|  | /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.board.platform>.so | 
|  | /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.arch>.so | 
|  | /system/libs/hw/<*_HARDWARE_MODULE_ID>.default.so | 
|  |  | 
|  | They also have a well defined interface which lives in include/hardware/. | 
|  |  | 
|  | A module can have several variants: "default", "arch" and "board", and they're | 
|  | loaded in the "board", "arch" and "default" order. | 
|  | The source code for the "board" variant, usually lives under partners/... | 
|  |  | 
|  | The source code for "default" and "arch" would usually | 
|  | live under hardware/modules/. | 
|  |  |