Re: [Tinycc-devel] arm-asm breaks aarch64 (as with Fedora 33 on RPi)

[Herman ten Brugge]

On 1/3/21 4:10 PM, Danny Milosavljevic wrote:
> Hi Herman,
>
> you committed a patch enabling all ARM 32 bit assembly tokens on aarch64.
>
> Just a heads-up that you have to mode switch the CPU in order to be able to
> execute ARM 32 bit machine code on aarch64.
>
> I mean the tokens alone are not that bad (they aren't functionality), but the
> functionality on aarch64 is different from ARM by default.
>
> The instruction decoder does not start out in arm32 mode on aarch64
> executables compiled for tcc, and also the aarch64 instruction set is not a
> superset of the ARM instruction set (per mode).
>
> I mean, technically it's still possible to do it--but are you sure you want to?
Your patch to split off arm32 from arm64 asm is probably the best solution.

    Herman