Recent questions tagged operating

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I am very much confused with these questions. On a 32 bit processor, every process has 4 GB virtual ... fully explaining the virtual memory. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - What happens when you overwrite a memory-mapped executable?

Following the comments on one of my questions I'm intrigued to know what happens when one overwrites an executable. ... better place to ask it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Software initialization code at 0xFFFFFFF0H

Intel says after reset the processor is placed in real mode and the software initialization code starts at ... these questions. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How to load kernel into memory from CD-ROM using Assembly (NASM)

I'm writing a bootstrap and kernel for myself and both bootstrap and kernel will be burn on a CD-R and will ... DH and DL. Regards, Pooria. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How to load kernel into memory from CD-ROM using Assembly (NASM)

I'm writing a bootstrap and kernel for myself and both bootstrap and kernel will be burn on a CD-R and will ... DH and DL. Regards, Pooria. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How to modify process preemption policies (like RR time-slices) in XV6?

Right now it seems that on every click tick, the running process is preempted and forced to yield the processor, I ... make it 10 clock-tick)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Segmentation in Linux : Segmentation & Paging are redundant?

I'm reading "Understanding Linux Kernel". This is the snippet that explains how Linux uses Segmentation which I ... 1st and last paragraph. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Where is the mode bit?

I just read this in "Operating System Concepts" from Silberschatz, p. 18: A bit, called the mode bit, is added to ... bit / how is it set?) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Virtual Memory Page Replacement Algorithms

I have a project where I am asked to develop an application to simulate how different page replacement algorithms ... working set size is? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Save a process' memory for later use?

Is it possible to pause a process, save the memory contents to a file, and then later reload the file so ... allocate the same memory regions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Linux kernel ARM Translation table base (TTB0 and TTB1)

Compiled Linux kernel 2.6.34.3 for ARMv7 (Cortex-a8) I looked into the kernel code and it looks like the ... kernel continue to run as usual) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - how dispatcher works?

I have recently started my OS course. As far as i know the work of dispatcher is to save the context of ... the context before loading itself ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Why do directory listings contain the current (.) and parent (..) directory?

Whenever I list the contents of a directory with a function like readdir, the returned file names also include ... that use different ones? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How can i put a compiled boot sector onto a USB stick or disk?

I'm actually interested in how an OS works, from the POST over the Boot process to the Kernel, GUI, etc. ... by copying it with explorer :D See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - OS; resources automatically clean up

From this answer: When is a C++ terminate handler the Right Thing(TM)? It would be nice to have a list ... . Question. Are there any exceptions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How processor handles case of division by zero

Curious what the processor/CPU does in general or let say, on intel cpu & Linux, when it executes a ... notify the developer? Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - What is INT 21h?

Inspired by this question How can I force GDB to disassemble? I wondered about the INT 21h as a concept. Now, ... it a DOS related strategy ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Convert the output of os.cpus() in Node.js to percentage

Is there a way to convert the os.cpus() info to percentage? Just like the output of iostat (on the CPU ... convert them to percentage :) Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Difference between interrupt and event

What is the difference between interrupt and an event? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - How do interrupts in multicore/multicpu machines work?

I recently started diving into low level OS programming. I am (very slowly) currently working through two older books ... that gets to it first? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - What is the difference between a stack overflow and buffer overflow?

What is the difference between a stack overflow and a buffer overflow in programming? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - In C, how is the main() method initially called?

How does a C program get started? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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512 views

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operating system - What's the difference between "virtual memory" and "swap space"?

Can any one please make me clear what is the difference between virtual memory and swap space? And why do we ... accessible is 4 GB only? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - OSError: Unable to locate Ghostscript on paths

I tried to open an EPS image with Pyzo, I have installed PIL and Ghostscript (as I saw that it is necessary ... English is not really perfect !) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - does close() imply flush() in Python?

In Python, and in general - does a close() operation on a file object imply a flush() operation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Get OS-Version in WinRT Metro App C#

I'm programming a Metro Style App with C# and the Visual Studio 11 Beta. Now I want to get the OS- ... NET Core there isn't this attribute See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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346 views

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operating system - How many hardware details can a Java Applet Discover?

I'm writing a Java applet to run differently under different hardware. For instance if I know a computer has a ... took to compile your code. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating system - Is it possible to code a device driver in Java?

Introduction I heard something about writing device drivers in Java (heard as in "with my ears", not from ... driver anyway? Thanks for reading See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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