在非安全状态下，存在3种特权等级（Privilege level）：PL0、PL1和PL2，描述如下： PL0：用户模式（User mode）运行的应用程序处于PL0特权等级。 运行在用户模式的程序被称为非特权程序。 非特 …

中文名 特权模式 外文名 privileged mode 所属学科 计算机科学技术 公布时间 2018年

The unrestricted mode is often called kernel mode, but many other designations exist (master mode, supervisor mode, privileged mode, etc.). Restricted modes are usually referred to as user modes, but …

Oct 28, 2024 · 两级特权操作通常分为“特权模式”（Privileged Mode）和“非特权模式”（Unprivileged Mode）。 下面详细介绍这两级特权操作的概念及其在不同处理器架构中的实现。

Dec 2, 2025 · Non-privileged instructions are operations that any user-level program can execute safely in User Mode, where direct access to hardware and critical system resources is blocked.

Hardware architectures implement privileged mode through mechanisms such as privilege rings, with Ring 0 representing the most privileged level and Ring 3 the least privileged, and recent systems …

The processor's Privilege level is always 'Privileged' while in Handler mode, however when in 'Thread' Mode, the Processor's Privilege level can be Privileged or User (also called Non-Privileged Level).

Also called the "kernel mode," "supervisor mode" or "supervisor state," it is the state in which the operating system runs, because it has access to all the hardware resources in the computer.

将 mcause 设置为当前发生的异常类型. 设置 mtval 和 mscratch. 完成 S 模式到 M 模式的切换. 跳转 PC 为在 mtvec 设置的异常处理程序地址. 注意, 在 RISC-V 规范中, 定义了三种特别的异常类型和一个指 …

Protection ring Privilege rings for the x86 available in protected mode In computer science, hierarchical protection domains, [1][2] often called protection rings, are mechanisms to protect data and …