Comments on: A mildly annoying 32bit adventure, also happy 30th PGP!

By: neozeed

neozeed — Thu, 17 Jun 2021 01:47:54 +0000

In reply to raijinkai. Oh they are using Qemu. I guess it kind of makes sense, but you can of course use this to load any other CPU architecture. I'd been hoping it was some injection thing.

By: raijinkai

raijinkai — Wed, 16 Jun 2021 22:25:46 +0000

Is this hack compatible with the binfmt-support trick to make 32bit elf’s to run under WSL1? If not, sorry… But I’m god glad this isn’t a widespread practice to do in linux world…

By: neozeed

neozeed — Tue, 15 Jun 2021 15:28:52 +0000

In reply to Bert. Im sure a lot more people would have used it, had they known. Especially it being a refugee on google hosting, no wonder time left it by.

By: Bert

Bert — Tue, 15 Jun 2021 14:21:03 +0000

The x32 abi is kind of a hybrid between x64 and x86… It’s an extended x86 with the extra registers and instructions, but still running with 32bit addressing. It should perform better and use slightly less memory than x64 mode assuming your code doesn’t require more than 4gb of memory.
There’s been calls to deprecate it from linux as it doesn’t get used much, and it looks like microsoft never implemented it in wsl1 (wsl2 is really just a vm running a regular linux kernel).

For backwards compatibility you’d typically just build in x86 mode (-m32) rather than using x32.