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The physical and virtual storage spaces in the Linux system have a range of addresses ranging from 0x00000000 to 0xFFFFFFFF, with 4GB in total, but physical storage space is completely different from the virtual storage space layout. Linux runs in virtual storage space and is responsible for mapping the actual physical memory in the system, which is much less th

", "false" memory, for example, a 0x08000000 memory address, it is not on the physical address of the large array 0x08000000-1 that address element;This is because modern operating systems provide a memory-managed image, virtual memory. The process uses the address in

Linux Memory Management---The difference between virtual address, logical address, linear address, physical address (i)This article describes the concept of four nouns, which are analyzed for four address conversionsThe CPU transl

Tags: exec processor cup attach segment memory management There is a des operation RIPThe analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the

The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the address (a bit esoteric) used in machine langu

This article was reproduced from: http://blog.csdn.net/yusiguyuan/article/details/9664887The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the

Analysis of the Linux memory management mechanism, not from the above concepts, before introducing the above several concepts, first from the "in-depth understanding of the Linux kernel," the book excerpt from a few paragraphs on the above nouns explanation: first , "deep understanding of the Linux kernel" explanation Logical addresses (Logical address) An address (somewhat esoteric) that is contained in a

Reference"Deep understanding of computer systems"Deep understanding of the Linux kernel"80x86 assembly Language Programming""The design and implementation of the operating system" In order to protect the program and data in memory and share hardware support, in order to provide hardware support for realizing virtual memory, modern CPU not only uses the extended memory segment management mechanism , but also provides optional memory paging management m

Logical Address virtual address physical address bus address difference, logical Bus 1. Logical Address Logical Address is the most vague concept. The explanation in understanding the l

I. Concepts Physical address)It is used for memory chip-level unit addressing, which corresponds to the address bus connected to the processor and CPU.-- This concept should be better understood among these concepts, but it is worth mentioning that although physical addresses can be directly understood as the memory itself inserted on the machine, consider the memory as a large array of serial numbers from

This blog post self-informed answer: Linux linear address, logical address and virtual address of the relationship?In order to prevent ambiguity, the following terms are used in English. Some of the terms are not explained, otherwise the answer will be too long.The following is an example of a code snippetUnder the Int

metaphysical image extraction. Virtual Memory)This is the image description of the entire memory (do not insert the upper number with the machine. It is relative to the physical memory, and can be directly understood as "not straight", "fake" memory, for example, a 0x08000000 memory address, it is not the address element of 0x08000000-1 in the large array on the

This article was reproduced from: http://blog.csdn.net/yusiguyuan/article/details/9668363This article describes the concept of four nouns, which are analyzed for four address conversionsThe CPU translates the address in one virtual memory space into a physical address, which requires two steps (for example):First, it w

physical memory addressing method, it directly maps the physical address to the physical memory one by one, it is also acceptable. Maybe wrong understanding is more conducive to the metaphysical image extraction.Virtual Memory) This is the image description of the entire memory (do not insert the upper number with the machine. It is relative to the physical memory, and can be directly understood as "not straight", "fake" memory, for example, a 0x080

1. Logical Address Logical Address is the most vague concept. The explanation in understanding the Linux kernel is related to virtual addresses. Based on the concept of hardware MMU and Software Memory Management, you can refer to the second chapter of utlk memory addressing, I have a very detailed explanation. However, the mips architecture processor used in the

Test procedure:TEST.c#include "stdio.h" #include "String.h" Class Gsvirtual{public:void GSV (char *src) {char buf[200];strcpy (BUF,SRC); Vir2 () ;} virtual void Vir1 () {printf ("Vir1");} virtual void Vir2 () {printf ("Vir2");}}; int main (int argc,char *argv[]) {gsvirtual TEST;TEST.GSV (argv[1]); return 0;}Compile under Linux: $g + +-o vtabletest./vtabletest.c See disassembly of Vtabletest under Ida, find

Get C + + virtual table address and virtual function addressby QianghaohaoHave learned C + + should have heard about the virtual table, there is not too much to introduce the concept, through the realExample to demonstrates how to obtain a virtual table

programmers to compile and run programs with much larger memory than the actual system. This allows many large projects to be implemented on systems with limited memory resources. An appropriate analogy is that you don't need a long track to drive a train from Shanghai to Beijing. You only need enough rails (for example, 3 kilometers) to complete this task. The train tracks are immediately placed in front of the train. As long as your operations are fast enough to meet the requirements, the tra

The MMU Memory Management Unit is responsible for converting the virtual memory address to the physical memory address. Later, when studying the page table, we can see that when a process requests access to its memory, it is the responsibility of the operating system to map the virtual

The VMware NAT host and Virtual Machine access the Internet together, and set a fixed IP address for the Virtual Machine to prevent IP address conversion restart (method tutorial), vmwarenat After the attempt (the host has wireless Internet access and the virtual machine h