The main motivation for the size chosen here is to be larger than total
amount of thread-local variables for most programs. Putting this allocation
in the ELF like this is equivalent to moving the mmap call below into the
kernel, avoiding syscall overhead.
var main_thread_area_buffer: [0x1000]u8 align(page_size_min) = undefined
var main_thread_area_buffer: [0x1000]u8 align(page_size_min) = undefined