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What is the difference between user and kernel modes in operating systems?
...change.com/questions/216527/ring-3-exploits-and-existence-of-other-rings
ARM
In ARM, the rings are called Exception Levels instead, but the main ideas remain the same.
There exist 4 exception levels in ARMv8, commonly used as:
EL0: userland
EL1: kernel ("supervisor" in ARM terminology).
Enter...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...a学习教程
lua参考手册Lua参考手册的中文翻译（云风翻译版本）
关于Lua的标库，你可以看看官方文档：string， table， math， io， os。
（全文完）
Lua 简明教程
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...指定使用的指令集
.386语句是汇编语句的伪指令，它在低版本的宏汇编中就已经存在，类似的指令还有：.8086、.186、.286、.386/.386p、.486/..486p和.586/.586p等，用于告诉编译器在本程序中使用的指令集。在DOS的汇编中默认使用的是8086...
What is the difference between the kernel space and the user space?
...ered Aug 31 '14 at 8:53
Varun SharmaVarun Sharma
49044 silver badges1010 bronze badges
...
Best practices for circular shift (rotate) operations in C++
...rotr intrinsics from <intrin.h> on x86 (including x86-64).
gcc for ARM uses an and r1, r1, #31 for variable-count rotates, but still does the actual rotate with a single instruction: ror r0, r0, r1. So gcc doesn't realize that rotate-counts are inherently modular. As the ARM docs say, "ROR...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...执行
#endif
（3）__IPHONE_OS_VERSION_MAX_ALLOWED :当前编译的SDK版本，可以与__IPHONE_9_0等宏定义进行比较，进行不同版本下代码的执行。示例如下：
if(__IPHONE_OS_VERSION_MAX_ALLOWED==__IPHONE_9_0){
//如果当前SDK版本为9.0是执行这里的代码
}els...
How do I use vimdiff to resolve a git merge conflict?
...two diffs that I want on the terminal, e.g. something along:
--- ./src/dev/arm/RealView_BASE_15560.py 2019-12-27 13:46:41.967021591 +0000
+++ ./src/dev/arm/RealView_LOCAL_15560.py 2019-12-27 13:46:41.979021479 +0000
@@ -994,7 +994,7 @@ ...
What is the list of possible values for navigator.platform as of today? [closed]
...ample on a Nexus 5 phone, both the Android browser and Chrome return Linux armv7l. In rare cases Android devices can even return null (instead of undefined).
Android (2008)
Linux: see notes above
null
Apple
As far as iOS goes: Safari, Chrome and Mercury agree, but Opera messes things up.
iPhone (...
在Citrix Xendesktop中使用ESXI作为底层平台 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
5. 连接步骤如下。
1. 在Xendesktop服务器上用IE浏览器打开vSphere的地址，此处建议用vSphere的FQDN地址打开。
2.点击继续浏览网站，然后点击证书错误处。
3. 在出现证书后点击查看证书，然后点击安装证书，将...
How to run a program without an operating system?
...de to a place where processor looks for after rebooting (e.g. address 0 on ARM).
Can you create assembly programs that the computer can load and run at startup ( e.g. boot the computer from a flash drive and it runs the program that is on the drive)?
General answer to the question: it can be d...