fopen("/zip/file.bin", "rb") does not work on BIOS boot

[trholding]

Error loading from the zip filesystem when bios booting. I do not have the issue running run.com normally.

$ qemu-system-x86_64 -serial stdio  -hda run.com 
WARNING: Image format was not specified for 'run.com' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
Unable to open the checkpoint file /zip/out/model.bin!
Unable to open the checkpoint file /zip/out/model.bin!

I have encountered this problem when bios booting https://github.com/trholding/llama2.c/blob/master/run.c with qemu.

I have the necessary #ifdefs in run.c

#ifdef COSMO_ZIP // Support embedded models via Zip Archive support
STATIC_YOINK("zipos");
#endif

I have also tried to build it with this branch: #833 but got the same error.

On x86_64 and Aarch64 its working fine:

Here is a link to the build/binary: https://github.com/trholding/llama2.c/releases/tag/experimental