ARMv8 - running 32-bit applications on a 64-bit OS

Question

Following the ARMv8 manual, I have the following questions to help understand the big picture.

• May be an outdated 32-bit application. (ARMv7 or earlier), like on ARMv8?

• If outdated applications need to be rebuilt for ARMv8 and provided that I rebuild the application as 32-bit (Aarch32), do I need 32-bit OS support for the OS? (It is interesting to know how the addressing mechanism works.)

Please provide links where possible.

PS: I am targeting Linux with Aarch64 support (3.7 and later)

Answer 1

Aarch64 32- ARM, .

AArch32, , 32- . , i686 x86-64.