#include #include SYSCALL_DEFINE1(ipc_server)(vm_t callback) { struct tcb *r = cur_tcb(); if (r->callback) /* server can't be reinitialized */ return 1; r->callback = callback; return 0; } SYSCALL_DEFINE4(ipc_req)(vm_t pid, vm_t d0, vm_t d1, vm_t d2) { struct tcb *t = get_tcb(pid); /* something like jump_to_callback(t, d0, d1, d2) */ return 0; } SYSCALL_DEFINE2(ipc_resp)(vm_t pid, vm_t ret) { struct tcb *r = get_tcb(pid); /* something like return_from_callback(t, r) */ return 0; /* oh yeah probably unreachable? */ }