GLOBAL_PAGES
volatile char __arena global_data[GLOBAL_PAGES][PAGE_SIZE];
globals = (void __arena *)(arena_base(&arena) + (ARENA_PAGES - GLOBAL_PAGES) * PAGE_SIZE);
ret = bpf_arena_reserve_pages(&arena, guard, ARENA_PAGES - GLOBAL_PAGES);
for (i = 0; i < GLOBAL_PAGES; i++) {
global_data[GLOBAL_PAGES - 1][PAGE_SIZE / 2] = magic;