edx linux

in registers to access memory locations is referred to as indirect addressing. When using a variable to reference the memory location of the data, the address of its memory location (similar to the C-address symbol ) can be obtained by adding the $ symbol in front of the variable in the instruction. The following command transmits the memory address referenced by the variable to the EDI register:movl $value,%ediCommandmovl%ebx, (%edi)The value in the EBX register is passed to the memory locatio

Dermot W.J. Zhang + original works reproduced please specify the source + "Linux kernel analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000I. Contents of the studySystem call: The operating system provides a set of interfaces for interacting with a hardware device for a user-state processAPI: Application programming interface, is a function definition.操作系统提供API和系统调用的关系。Libc库定义的一些API引用封装例程（wrapper routine）。一般每个系统调用对应一个封装例程。库再用这些封装例程定

This paper mainly discusses the access efficiency of heap and stack in use. Use macro assembly instructions to analyze the access situation for simple inference.Lab environment and usage tools: i686,32-bit Ubuntu Linux. GCC (Ubuntu/linaro 4.6.3-1ubuntu5) 4.6.3,gdbFirst, refer to the code of the question and the "answer", which is "more heap and stack access efficiency." But in fact, he gave the two ways to use the stack, the individual tries to occupy

Release date:Updated on: Affected Systems:Linux kernel 2.6.xDescription:--------------------------------------------------------------------------------Bugtraq id: 57838CVE (CAN) ID: CVE-2013-0268Linux Kernel is the Kernel of the Linux operating system.Linux kernel versions earlier than 3.7.6 are arch/x86/kernel/msr. in c, the msr_open function has a vulnerability that allows local users to execute special applications with root permissions to bypass

I. Embedded assembly execution of Fork#include #includeintMain () {pid_t pid; ASMvolatile( "mov $0,%%ebx\n\t" "mov $0x2,%eax\n\t" "int 0x80\n\t" "mov%%eax,%0\n\t" :"=m"(TT)); if(pid==0) {printf ("Child is running. \ n"); } Else{printf ("father is running...\n"); }}two. System call to read (system call with parameters) intReadintFdCharBuf[],intLen) { intret; ASMvolatile( "mov%3,%%edx\n\t" //Count->

From today to learn NetEase cloud classroom Monensin Teacher's "Linux kernel Analysis" course, link Address: Http://mooc.study.163.com/course/USTC-1000029000#/info, record course study notes.The first week's content mainly introduces the von Neumann architecture ,the att format of the 32-bit x86 assembly language , and a simple C program disassembly into the assembly code of the execution analysis process .first, von Neumann architecture--Stored progr

"X86/x64 system exploration and programming" mentioned in x64 there is only one calling convention, respectively, using ecx,edx,edi,esi,r8d,r9dFloating-point numbers use xmm0 ....C Code:#include "stdio.h" #include "string.h" void pp (int a,int b,int c,int d,int e,int F, int g, int h, int i,int j) {}void main () { PP (1,2,3,4,5,6,7,8,9,0);}The disassembly code of the main function.dumpofassemblercodeforfunctionmain:0x000000000040048e The assembly code

Record what you have learned O (∩_∩) o haha ~MakefileLINK.BIN:START.O MAIN.OArm-linux-ld-tlink.lds-o link.elf $^Arm-linux-objcopy-o binary link.elf Link.binarm-linux-objdump-d link.elf > Link_elf.disGCC Mkv210_image.c-o mkmini210./mkmini210 Link.bin 210.bin%.O:%. SArm-linux-gcc-o [email protected] $%.O:%.cArm-

a system call user program to pass system call parameters to the kernel user program to obtain the system call return values returned by the kernel. the following shows how Linux implements the above three functions. 2.1 notify the kernel to call a system. each system call has a system call number. when a system call occurs, the kernel knows which system call is called based on the incoming system call number. In x86 architecture, the user space plac

. 0 process creates process number 1th and other service threads.Daosh One (start_kernel-->cpu_idle), a lifetime of two (Kernel_init and Kthreadd), two born three (i.e. front 0, 1 and 23 processes), Sansheng everything (1th process is the ancestor of all user-state processes, Process number 2nd is the ancestor of all kernel threads)Three layers of skin (top) of the system callSystem call: Even the simplest program, in the case of input and output operations, will also need to invoke the service

The waiting queue of Linux kernel is based on the double cyclic list, which is closely combined with the process scheduling mechanism, and can be used to realize the core asynchronous event notification mechanism. In this list, there are two types of data structures: The waiting queue header (wait_queue_head_t) and the Wait queue item (wait_queue_t). Both the wait queue header and the Wait queue item contain a list_head type of domain as a "join". It

This article is the best practice of Linux. It aims to help Chinese cabbage learn how to log on to Linux. In the previous article, virtual machines and Linux have been installed. How can I log on locally and remotely? How much do you know? If you want to hear the voice broadcast from Niu every day and want to learn more IT technologies or skills that are not big

[Linux] PHP programmers play with Linux series-easily use email via telnet, and use telnet via linux 1. PHP programmers turn to the Linux series-how to install and use CentOS 2. PHP programmers play with Linux series-lnmp Environment Construction 3. PHP programmers play with