[gemesa]

Fixes #91

str_val is a 256 char byte array so clang assumes 1 byte alignment. Filling it takes 256 single byte stores and this is over the eBPF backend’s limit so LLVM uses a memset call instead. Older clang managed it somehow without calling memset but clang 23 does not.

The memory is already 8 byte aligned in practice because map values are:

https://github.com/torvalds/linux/blob/v6.1/kernel/bpf/hashtab.c#L128
https://github.com/torvalds/linux/blob/v6.1/kernel/bpf/hashtab.c#L1042

We just need to let clang know about this also by adding the attribute.

After this fix, there are no memset references and the program can be loaded.

$ llvm-readelf -s user/assets/syscall.o user/assets/stack.o | grep memset