linux assembly book

. This amount of displacement is added to the IP register. The displacement amount is a signed number, negative numbers indicate a forward transition, and positive numbers indicate a backward transition. The transfer range is 32768 to +32767.Third, the indirect transfer ①jmp AX (intra-segment register indirect transfer); ②jmp [BX] (Intra-segment memory indirect transfer). Sends the contents of the specified register or storage unit in the instruction to the IP.Direct transfer of JMP far PTR desi

moveax4 ;system call Number (Sys_write) movEbx1 ;First Argument:file handle (stdout) movEcx,msg;second argument:pointer to message to write movEdx,len;Third Argument:message length int0x80;Call kernel;and exit moveax1 ;system call Number (Sys_exit) XOREbx,ebx;First syscall argument:exit code int0x80;Call kernel4. Compile the connection#nasm-F elf64 hello.asm (Linux is 64-bit, if 32, use ELF32)#ld-

After the foreshadowing of the previous article seems to be very easy to use the assembly to write mmap code, you can look carefully, or there are a number of problems need to be resolved:1. System call Mmap If an error does not directly return map_failed (-1), but rather a "similar" value, the C library's mmap function wraps it so that it eventually returns-1; if we call Mmap Syscall directly, then these things have to be done by ourselves.2.C Librar

The first Linux assembly-general Linux technology-Linux programming and kernel information. The following is a detailed description. Today I learned the nasm assembly language in linux and posted the source code so that I can reca

:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) We can see that the host has lo, eth0, eth1 and other network equipment, the following we run the program to network NAMESPCE inside to see. root@iz254rt8xf1z:~/gocode/src/book# Go run main.go $ ifconfig $ We found that there were no network devices in the namespace. This will show

+4 Line 7 returns the G function, and after execution, the contents of the popup stack are placed in the IP, and the stack goes back to the state before the function g is called, getting g (8) Go back to the F function: Line 13 ~ 15 after execution, the stack reverts to function f called, gets f (8) Finally, go back to the main function: Line 22 executes, sp+4, SP points to BP value (this BP's value is the value to the bottom of the stack),

Operating SystemLinux kernel design and implementation (version 2nd)In-depth understanding of Linux kernel (version 2)Linux Kernel analysis and programmingLinux has the most good books. Design and Implementation of Linux kernel (2nd edition)Is short and concise, and is used as a matching tool for operating system concepts.In-depth understanding of the L I n u X K

In high-level languages such as C language to write a factorial is very simple, it is now familiar with the Linux use at/T assembly format to write a program to calculate the factorial barThe first is to use the jump instruction implementation, the second is to use the function to implementConvention: This program does not print the results on the standard output. Need to use GDB debug to viewThe wording of

This document copies the content of the following two documents: (1) "handling Linux kernel missing page exceptions using abnormal tables" http://www-128.ibm.com/#works/cn/linux/kernel/l-page/index.html; (2) "implementation and understanding of user/kernel space data replication" www.linuxforum.net. The address ing of user processes is sometimes not established (such as a stack), and the page in pg_dir has

system, the command is as follows:nasm -f macho64 p.sld -o p p.oBecause the title of Benbow is a compilation under Linux, please refer to this cat's other blog post [Mac OS X64 bit and 32-bit assembler system call] under Mac OS X.If you want to generate 32-bit code, at compile time to change the elf64 to ELF32, but I said before: 32-bit and 64-bit assembly structure changes, light change this is no way to

There were a few blogs detailing Xen's memory initialization, and it really felt like this was a pretty complicated piece of content. These two days to see the Linux kernel boot memory initialization, is also looking at the fog, want to try to read the next write, in the process of writing a blog slowly thinking, and finally can share their thoughts to others. This series is mainly divided into two parts, assembly