1*795d594fSAndroid Build Coastguard Worker# Native Bridge 2*795d594fSAndroid Build Coastguard Worker 3*795d594fSAndroid Build Coastguard WorkerA native bridge enables apps with native components to run on systems with 4*795d594fSAndroid Build Coastguard Workerdifferent ISA or ABI. 5*795d594fSAndroid Build Coastguard Worker 6*795d594fSAndroid Build Coastguard WorkerFor example, an application which has only native ARM binaries may run on an x86 7*795d594fSAndroid Build Coastguard Workersystem if there’s a native bridge installed which can translate ARM to x86. This 8*795d594fSAndroid Build Coastguard Workeris useful to bootstrap devices with an architecture that is not supported by the 9*795d594fSAndroid Build Coastguard Workermajority of native apps in the app store (it closes the gap between the number 10*795d594fSAndroid Build Coastguard Workerof apps that can be run on that particular architecture). 11*795d594fSAndroid Build Coastguard Worker 12*795d594fSAndroid Build Coastguard WorkerStarting from L, AOSP supports native bridges (note that it *does not* provide 13*795d594fSAndroid Build Coastguard Workeran actual native bridge). 14*795d594fSAndroid Build Coastguard Worker 15*795d594fSAndroid Build Coastguard WorkerThe `libnativebridge` library handles loading of native libraries with a foreign 16*795d594fSAndroid Build Coastguard WorkerISA (aka *translated* libraries in the *guest* environment) into a managed JVM 17*795d594fSAndroid Build Coastguard Workerprocess using the native ISA in the *host* environment. Note that loading 18*795d594fSAndroid Build Coastguard Workertranslated libraries and their dependencies in the guest environment is done by 19*795d594fSAndroid Build Coastguard Workera separate linker, which typically uses a different linker config than the host 20*795d594fSAndroid Build Coastguard Workerone. 21*795d594fSAndroid Build Coastguard Worker 22*795d594fSAndroid Build Coastguard Worker 23*795d594fSAndroid Build Coastguard Worker 24*795d594fSAndroid Build Coastguard WorkerSee also [design doc](http://go/native-bridge) (internal only). 25
