公开(公告)号：US07809911B2

公开(公告)日：2010-10-05

申请号：US12263802

申请日：2008-11-03

申请人： Denise M. Gentry ,  Shawn P. Mullen ,  James S. Tesauro

发明人： Denise M. Gentry ,  Shawn P. Mullen ,  James S. Tesauro

IPC分类号： G06F12/14

CPC分类号： G06F12/1466

摘要： Exemplary methods, systems, and products are described that operate generally by moving subroutine return address protection to the processor itself, in effect proving atomic locks for subroutine return addresses stored in a stack, subject to application control. More particularly, exemplary methods, systems, and products are described that write protect subroutine return addresses by calling a subroutine, including storing in a stack memory address a subroutine return address and locking, by a computer processor, the stack memory address against write access. Calling a subroutine may include receiving in the computer processor an instruction to lock the stack memory address. Locking the stack memory address may be carried out by storing the stack memory address in a protected memory lockword. A protected memory lockword may be implemented as a portion of a protected content addressable memory.

摘要翻译： 描述了通常通过将子程序返回地址保护移动到处理器本身的示例性方法，系统和产品，实际上证明了存储在堆栈中的子程序返回地址的原子锁，在应用程序控制下。 更具体地，描述了示例性方法，系统和产品，其通过调用子程序来写入保护子程序返回地址，包括存储堆栈存储器地址子程序返回地址并由计算机处理器锁定堆栈存储器地址以防写入访问。 调用子程序可以包括在计算机处理器中接收锁定堆栈存储器地址的指令。 锁定堆栈存储器地址可以通过将堆栈存储器地址存储在受保护的存储器锁定字中来执行。 受保护的存储器锁字可以被实现为受保护内容可寻址存储器的一部分。