For the record, the particular bits of asm that I'm taking about are in
a different source package, but these packages are all interwoven and
should really be a single source package. These are the files in question:
android-platform-system-core/libunwindstack/AsmGetRegsMips64.S
android-platform-system-core/libunwindstack/AsmGetRegsMips.S
android-platform-system-core/libunwindstack/AsmGetRegsX86.S
android-platform-system-core/libunwindstack/AsmGetRegsX86_64.S
Upstream only builds the Tools/SDK for x86, though lots of this code is
built for ARM because it is used in the Android OS.