extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
rawctx_entry_point_t entry_point, void* arg);
extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);
extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
rawctx_entry_point_t entry_point, void* arg);
extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);