公开(公告)号：US20110078408A1

公开(公告)日：2011-03-31

申请号：US12874622

申请日：2010-09-02

申请人： Norihito Ishida ,  Toyoaki Inada ,  Eitaroh Kasamatsu ,  Noritoshi Yoshiyama

发明人： Norihito Ishida ,  Toyoaki Inada ,  Eitaroh Kasamatsu ,  Noritoshi Yoshiyama

IPC分类号： G06F12/08 ,  G06F15/177

CPC分类号： G06F21/572 ,  G06F21/74 ,  G06F2221/2105

摘要： A method for protecting a privilege level of a system management mode (SMM) of a computer system is disclosed. A SMM program is loaded into a special memory (SMRAM) area within a system memory of a computer. A first program, a second program, and a vector table are loaded into a general area of the system memory. Before the booting process of the computer has been completed, a reference hash value of the first program is determined by the SMM program, and the reference hash value is stored in the SMRAM area. A hash value of the first program is the computed by the SMM program. After the computer has been operating under an operating environment of an operating system, the computed hash value is compared to the reference hash value. When the computed hash value matches the reference hash value, the first program is called by the SMM program.

摘要翻译： 公开了一种用于保护计算机系统的系统管理模式（SMM）的特权级别的方法。 SMM程序被加载到计算机的系统存储器内的特殊存储器（SMRAM）区域中。 第一程序，第二程序和向量表被加载到系统存储器的一般区域中。 在计算机的引导过程完成之前，由SMM程序确定第一程序的参考散列值，并将参考散列值存储在SMRAM区域中。 第一个程序的哈希值是由SMM程序计算的。 在计算机在操作系统的操作环境下操作之后，将所计算的散列值与参考散列值进行比较。 当计算的散列值与引用散列值匹配时，第一个程序由SMM程序调用。

公开(公告)号：US08694794B2

公开(公告)日：2014-04-08

申请号：US12874622

申请日：2010-09-02

申请人： Norihito Ishida ,  Toyoaki Inada ,  Eitaroh Kasamatsu ,  Noritoshi Yoshiyama

发明人： Norihito Ishida ,  Toyoaki Inada ,  Eitaroh Kasamatsu ,  Noritoshi Yoshiyama

IPC分类号： G06F12/08 ,  G06F15/177

CPC分类号： G06F21/572 ,  G06F21/74 ,  G06F2221/2105

摘要： A method for protecting a privilege level of a system management mode (SMM) of a computer system is disclosed. A SMM program is loaded into a special memory (SMRAM) area within a system memory of a computer. A first program, a second program, and a vector table are loaded into a general area of the system memory. Before the booting process of the computer has been completed, a reference hash value of the first program is determined by the SMM program, and the reference hash value is stored in the SMRAM area. A hash value of the first program is the computed by the SMM program. After the computer has been operating under an operating environment of an operating system, the computed hash value is compared to the reference hash value. When the computed hash value matches the reference hash value, the first program is called by the SMM program.

摘要翻译： 公开了一种用于保护计算机系统的系统管理模式（SMM）的特权级别的方法。 SMM程序被加载到计算机的系统存储器内的特殊存储器（SMRAM）区域中。 第一程序，第二程序和向量表被加载到系统存储器的一般区域中。 在计算机的引导过程完成之前，由SMM程序确定第一程序的参考散列值，并将参考散列值存储在SMRAM区域中。 第一个程序的哈希值是由SMM程序计算的。 在计算机在操作系统的操作环境下操作之后，将所计算的散列值与参考散列值进行比较。 当计算的散列值与引用散列值匹配时，第一个程序由SMM程序调用。

公开(公告)号：US07225352B2

公开(公告)日：2007-05-29

申请号：US10792587

申请日：2004-03-03

申请人： Seiichi Kawano ,  Toyoaki Inada ,  Norihito Ishida ,  Yasumasa Takeda

发明人： Seiichi Kawano ,  Toyoaki Inada ,  Norihito Ishida ,  Yasumasa Takeda

IPC分类号： G06F1/00

CPC分类号： G06F1/3237 ,  G06F1/3203 ,  G06F1/3275 ,  Y02D10/128 ,  Y02D10/14

摘要： An information processor includes a power-saver which switches a display memory to a power-saving state that causes image data to be lost and restores the display memory from the power-saving state. A storage area stores a predetermined activation condition and an activation routine mechanism activates a predetermined routine when the activation condition is satisfied. A routine termination mechanism ends the routine and an image data re-creation mechanism executes re-creation of the image data on the display memory when the routine is terminated. Provided are: an activation condition rewriting mechanism which rewrites the activation condition stored in the storage area so that the routine is activated when the display memory is switched to or restored from the power-saving state; and an activation condition restoration mechanism which restores the rewritten activation condition to the original condition after the routine is activated.

摘要翻译： 信息处理器包括将显示存储器切换到使图像数据丢失的省电状态的节电器，并且从显示存储器恢复省电状态。 存储区域存储预定的激活条件，并且激活程序机构在满足激活条件时激活预定程序。 例程终止机制结束例程，并且图像数据重新创建机构在程序终止时，在显示存储器上执行图像数据的重新创建。 提供：激活条件重写机制，其重写存储在存储区域中的激活条件，使得当显示存储器切换到或从功率节省状态恢复时该程序被激活; 以及激活条件恢复机制，其在所述例程被激活之后将所述重写的激活条件恢复到原始状态。