Given the mixed architecture references and the binder term, the most plausible explanations fall into three categories:
"64" signifies 64-bit architecture (x86-64 or ARM64). The juxtaposition of arm32 and 64 is unusual. It might indicate:
You probably have a file named something like boot.img.xz (compressed) that contains a 64-bit kernel (64a) and a 32-bit userspace/system (arm32), using binder (IPC).
Given the mixed architecture references and the binder term, the most plausible explanations fall into three categories:
"64" signifies 64-bit architecture (x86-64 or ARM64). The juxtaposition of arm32 and 64 is unusual. It might indicate:
You probably have a file named something like boot.img.xz (compressed) that contains a 64-bit kernel (64a) and a 32-bit userspace/system (arm32), using binder (IPC).