SYSCALL
op->type = SYSCALL;
case SYSCALL: /* sc */
F(SYSCALL),
SYSCALL(__NR_exit, ALLOW),
SYSCALL(__NR_exit_group, ALLOW),
SYSCALL(__NR_write, JUMP(&l, write_fd)),
SYSCALL(__NR_read, JUMP(&l, read)),
SEC_DEF("syscall", SYSCALL, 0, SEC_SLEEPABLE),
CASE(SYSCALL, sys_bpf, true),