Advanced users • Re: Running 32bit ELF executables on 64bit Pi OS

I was able to install arm-linux-gnueabihf-gcc-12 on aarch64 Bookworm, but the armhf shared libraries are missing. Since you were able to run sudoku, I know you must have them properly installed.

I already had the cross compiler installed on my bookworm64 system, and I do not remember how or why. But I think the libraries you need are libc6:armhf libgcc-s1:armhf.

Are you sure you are not already using a 32bit compiler? I still cannot see how you would avoid the warnings or have the JIT work, unless your target environment has int the same width as pointer.

strace -i gives us just enough information to debug the crash:The instruction at 0x158 bytes into the binary is the ldr here:I am used to SIGBUS meaning that we went outside the extent of an mmapped file (usually because the disk is full), but this is a straightforward alignment issue. readelf confirms that the .got in the binary is misaligned:How does this work in a 32bit distro? I think it might actually depend on the CPU model. I can only reproduce a bus error when attempting a misaligned read directly to PC. Reading to a different register first and then moving appears to hide the problem.

Statistics: Posted by jojopi — Fri Apr 25, 2025 6:07 pm

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