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    • 1. 发明授权
    • Method and apparatus for performing a trap operation in an information handling system
    • 在信息处理系统中执行陷阱操作的方法和装置
    • US06336184B1
    • 2002-01-01
    • US09134010
    • 1998-08-14
    • Gregory A. BurkeGreg A. DyckDavid E. LeeBrian B. MooreSteven J. Repka
    • Gregory A. BurkeGreg A. DyckDavid E. LeeBrian B. MooreSteven J. Repka
    • G06F948
    • G06F9/3005G06F8/78
    • A central processing unit of an information handling system is provided with a Trap instruction to facilitate transfer of control from a user program to a trap program. A dispatchable unit control block (DUCT) of the CPU is loaded with the address of a trap control block, which in turn contains the addresses of a trap save area and a trap program. The user program is provided with Trap instructions at the desired transfer points. Upon decoding a Trap instruction in the user program, the CPU saves state information from the program status word (PSW), general registers and access registers in the designated trap save area, loads the address of the trap control block into a general register, and copies the address of the trap program into the instruction address field of the PSW to transfer control to the trap program. Upon completion of execution, the trap program may issue a Resume Program (RP) instruction to restore the previously saved state information to return control to the user program.
    • 信息处理系统的中央处理单元设置有Trap指令,以便于将控制从用户程序传送到陷阱程序。 CPU的可调度单元控制块(DUCT)装载有陷阱控制块的地址,该地址又包含陷阱保存区域的地址和陷阱程序。 用户程序在所需的传输点提供陷阱指令。 在解码用户程序中的Trap指令时,CPU从指定的陷阱保存区中的程序状态字(PSW),通用寄存器和访问寄存器中保存状态信息,将陷阱控制块的地址加载到通用寄存器中, 将陷阱程序的地址复制到PSW的指令地址字段中,以将控制传输到陷阱程序。 完成执行后,陷阱程序可以发出恢复程序(RP)指令以恢复先前保存的状态信息,以将控制权返回给用户程序。
    • 3. 发明授权
    • Method and apparatus for runtime remediation of object-code instructions in a computer program
    • 计算机程序中对象代码指令运行时修复的方法和装置
    • US06708180B1
    • 2004-03-16
    • US09133878
    • 1998-08-14
    • Greg A. DyckBrian B. Moore
    • Greg A. DyckBrian B. Moore
    • G06F1730
    • G06F8/78Y10S707/955Y10S707/99944
    • A method and apparatus for runtime remediation of object-code instructions (such as date instructions that are not year 2000 compliant) in a computer program. Before runtime, a setup function of a program monitor locates each instruction to be remediated in a load module of a user program and overlays the instruction with a trap instruction. The address of the overlaid instruction is stored in a scan slot of a window control table (WCT). The text of the overlaid instruction is stored in a corresponding operand slot of the WCT along with control information including a set of flags and windowing and cycling parameters. At runtime, upon decoding a trap instruction, the CPU transfers control to an instruction simulation function of the program monitor, which searches the scan slots of the WCT for the one containing the address of the overlaid instruction. Upon finding the scan slot, the instruction simulation function performs an instruction simulation operation in accordance with the control information in the corresponding operand slot, then returns control to the user program. If an execute flag is not set, the instruction simulation function invokes a specified user routine without executing the overlaid instruction. If the execute flag is set, the instruction simulation function executes the overlaid instruction in a mode of operation determined by the remaining flags. In a windowing mode, one or both instruction operands are compared with a specified delimiter, and the instruction is executed as though a specified increment were added to the operand before performing the operation of the instruction if the operand is less than the delimiter. In a cycling mode, a specified increment is added to the result the instruction would otherwise produce if that result is less than zero.
    • 一种用于在计算机程序中运行时修复目标代码指令(例如不符合2000年的日期指令)的方法和装置。 在运行之前,程序监视器的设置功能定位要在用户程序的加载模块中修复的每个指令,并用陷阱指令覆盖指令。 重叠指令的地址存储在窗口控制表(WCT)的扫描槽中。 覆盖指令的文本被存储在WCT的对应操作数时隙中,以及包括一组标志和开窗和循环参数的控制信息。 在运行时,在解码陷阱指令时,CPU将控制转移到程序监视器的指令仿真功能,程序监视器在WCT的扫描槽中搜索包含重叠指令地址的扫描槽。 在找到扫描槽时,指令仿真功能根据相应的操作数时隙中的控制信息执行指令模拟操作,然后将控制权返回给用户程序。 如果未设置执行标志,则指令仿真功能调用指定的用户程序,而不执行重叠指令。 如果设置了执行标志,则指令模拟功能以由剩余标志确定的操作模式执行重叠指令。 在开窗模式下,将一个或两个指令操作数与指定的分隔符进行比较,并且如果操作数小于分隔符,则在执行指令操作之前,将指令执行为执行指定的增量。 在循环模式中,如果该结果小于零,则指令将被添加到结果中。
    • 7. 发明授权
    • System for predicting year-2000 instruction failures
    • 预测2000年教学失败的系统
    • US06279127B1
    • 2001-08-21
    • US09136279
    • 1998-08-20
    • Brian B. Moore
    • Brian B. Moore
    • G06F1100
    • G06F8/78Y10S707/99942
    • Object-code instruction traces are employed to analyze selected instructions of an application program for possible failure when confronted by a year-2000 date. The analysis includes directly identifying one or more instructions of the application program that may fail, as well as identifying whether the one or more instructions have a characteristic of a predefined false-positive failure pattern. A failure-pattern descriptor is assigned to each examined instruction which is indicative of whether the instruction may fail when confronted by a date in the year-2000 range, and whether the instruction is a possible false-positive failing instruction. The analysis employs user-specifiable run-control values, as well as predetermined filter-specification values in comparing traces of each selected object-code instruction to predefined instruction failure patterns.
    • 采用对象代码指令轨迹来分析​​应用程序的选择指令,以便在面对2000年的日期时可能发生故障。 分析包括直接识别可能失败的应用程序的一个或多个指令,以及识别一个或多个指令是否具有预定义的假阳性故障模式的特性。 分配给每个被检查指令的故障模式描述符,其指示当在2000年范围内的日期面临时该指令是否可能失败,以及该指令是否是可能的假正向失败指令。 分析使用用户可指定的运行控制值以及将每个选定的目标代码指令的轨迹与预定义的指令故障模式进行比较的预定的滤波器规格值。
    • 9. 发明授权
    • Predicting year-2000 instruction failures
    • 预测2000年的指导失败
    • US06253336B1
    • 2001-06-26
    • US09137465
    • 1998-08-20
    • Brian B. Moore
    • Brian B. Moore
    • G06F1730
    • G06F8/78Y10S707/99936
    • Object-code instruction traces are employed to analyze selected instructions of an application program for possible failure when confronted by a year-2000 date. The analysis includes directly identifying one or more instructions of the application program that may fail, as well as identifying whether the one or more instructions have a characteristic of a predefined false-positive failure pattern. A failure-pattern descriptor is assigned to each examined instruction which is indicative of whether the instruction may fail when confronted by a date in the year-2000 range, and whether the instruction is a possible false-positive failing instruction. The analysis employs user-specifiable run-control values, as well as predetermined filter-specification values in comparing traces of each selected object-code instruction to predefined instruction failure patterns.
    • 采用对象代码指令轨迹来分析​​应用程序的选择指令,以便在面对2000年的日期时可能发生故障。 分析包括直接识别可能失败的应用程序的一个或多个指令,以及识别一个或多个指令是否具有预定义的假阳性故障模式的特性。 分配给每个被检查指令的故障模式描述符,其指示当在2000年范围内的日期面临时该指令是否可能失败,以及该指令是否是可能的假正向失败指令。 分析使用用户可指定的运行控制值以及将每个选定的目标代码指令的轨迹与预定义的指令故障模式进行比较的预定的滤波器规格值。
    • 10. 发明授权
    • Method for predicting year-2000 instruction failures
    • 预测2000年教学失败的方法
    • US6067544A
    • 2000-05-23
    • US136833
    • 1998-08-20
    • Brian B. Moore
    • Brian B. Moore
    • G06F9/44G06F17/30
    • G06F8/78Y10S707/99936
    • Object-code instruction traces are employed to analyze selected instructions of an application program for possible failure when confronted by a year-2000 date. The analysis includes directly identifying one or more instructions of the application program that may fail, as well as identifying whether the one or more instructions have a characteristic of a predefined false-positive failure pattern. A failure-pattern descriptor is assigned to each examined instruction which is indicative of whether the instruction may fail when confronted by a date in the year-2000 range, and whether the instruction is a possible false-positive failing instruction. The analysis employs user-specifiable run-control values, as well as predetermined filter-specification values in comparing traces of each selected object-code instruction to predefined instruction failure patterns.
    • 采用对象代码指令轨迹来分析​​应用程序的选择指令,以便在面对2000年的日期时可能发生故障。 分析包括直接识别可能失败的应用程序的一个或多个指令,以及识别一个或多个指令是否具有预定义的假阳性故障模式的特性。 分配给每个被检查指令的故障模式描述符,其指示当在2000年范围内的日期面临时该指令是否可能失败,以及该指令是否是可能的假正向失败指令。 分析使用用户可指定的运行控制值以及将每个选定的目标代码指令的轨迹与预定义的指令故障模式进行比较的预定的滤波器规格值。