ptrace_get_reg
int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data);
ret = ptrace_get_reg(child, (int) index, &tmp);
ret = ptrace_get_reg(child, numReg, &tmp2);
ret = ptrace_get_reg(child, numReg, &freg);
ret = ptrace_get_reg(child, index, &tmp);