Comment 4 for bug 1749393

Could we over-allocate the data segment by QEMU_DATA_SIZE/getrlimit(RLIMIT_DATA)/128 MB depending on what's set - similar to how the stack size is managed?

My current workaround for aarch64 on x86-64 is to mmap a dynamic main executable in some far-away part of the address space but I'm not sure how to find somewhere suitable on a 32-bit host/guest.