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ARMv8 - Running legacy 32 bit Applications on 64 bit OS

Tags:

linux

arm

arm64

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

  1. Can legacy 32 bit app. (ARMv7 or earlier) run as is on the ARMv8 OS?

  2. If the legacy applications need to be rebuilt for ARMv8 and assuming that I rebuild the application as 32 bit (Aarch32), does this need 32 bit OS underlying support? (It is interesting to know how the addressing mechanism works here.)

Please provide references wherever possible.

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

like image 345
MS. Avatar asked Mar 17 '14 17:03

MS.

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1 Answers

Aarch64 platform may run 32bit ARM but this compatibility is optional.

To run AArch32 binaries you need all libraries application would use in 32bit versions. Same as with i686 binaries on x86-64 systems.

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Marcin Juszkiewicz Avatar answered Nov 03 '22 01:11

Marcin Juszkiewicz
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