@matthey

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Congrats on your progress.

Thanks. I'm trying to do my best.

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Are the executables using Thumb2/ARM32 or AArch64?

They are arm32 executables. I was thinking about aarch64, especially about using the ilp32 mode on aarch64, where int, long and pointer are all 32 bit. This could give us some advantages of 64-bit ARM, like 32 general purpose registers and ability to do 64bit math in single register, whilst keeping the whole 32 bit compatible. The problem is however extremely scarce support for ILP32. There are some people at linaro working on this but there is no code in main repositories of binutils or gcc yet. So no, I wouldn't like to try that. Aarch64 port of AROS yes, some day, but not with 32bit simulated in 64bit mode.

If whole toolchain would be completed (in main repositories and stable) I would consider it though ;)

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The Raspberry Pi doesn't have enough memory to need 64 bit support

The memory doesn't matter that much. For a long time I was thinking about misusing 64bit address space for other purposes, even if amount of physical memory is not that large.

Just think about single address space where each task gets it's own 2GB slot (or multiple of 2GB slots) of virtual memory, with stack going downwards and expanding if necessary...