Install and use bochs in Ubuntu

Bochs is an ia32 (x86) architecture simulator that can run on multiple platforms.

The Installation Process in Ubuntu is as follows:

(1) install vgabios bochs-x bximage

$ sudo apt-get install vgabios  bochs-x bximage

(2) install bochs

Download the source code from the official website: bochs-2.4.5.tar.gz, decompress the generated bochs-2.4.5 directory, and then enter the Directory and install:

$ cd bochs-2.4.5/$ ./configure --enable-debugger --enable-disasm$ make$ sudo make install

Introduction to bochs:

(1) Use bximage to create a disk image:

$ bximage ========================================================================                                bximage                  Disk Image Creation Tool for Bochs        $Id: bximage.c,v 1.34 2009/04/14 09:45:22 sshwarts Exp $========================================================================Do you want to create a floppy disk image or a hard disk image?Please type hd or fd. [hd] fdChoose the size of floppy disk image to create, in megabytes.Please type 0.16, 0.18, 0.32, 0.36, 0.72, 1.2, 1.44, 1.68, 1.72, or 2.88. [1.44] I will create a floppy image with  cyl=80  heads=2  sectors per track=18  total sectors=2880  total bytes=1474560What should I name the image?[a.img] bb.imgWriting: [] Done.I wrote 1474560 bytes to bb.img.The following line should appear in your bochsrc:  floppya: image="bb.img", status=inserted

As shown above, a disk image named BB. IMG is created in the current directory.

(2) bochsrc configuration file

If no configuration file is specified when bochs is started, the default configuration file will be searched. The search order is as follows:

1. . BochsrcCurrent Directory

2. BochsrcCurrent Directory

3. Bochsrc.txtCurrent Directory

4. (Win32 only)Bochsrc. bxrcCurrent Directory

5. (Unix only). BochsrcMain directory of the current user

6. (Unix only)BochsrcIn the/etc directory

   For the configuration file writing format, refer to the following:

    ###############################################################2 # Configuration file for Bochs3 ###############################################################45 # how much memory the emulated machine will have6 megs: 3278 # filename of ROM images9 romimage: file=/usr/share/bochs/BIOS-bochs-latest10 vgaromimage: file=/usr/share/vgabios/vgabios.bin1112 # what disk images will be used13 floppya: 1_44=a.img, status=inserted1415 # choose the boot disk.16 boot: floppy1718 # where do we send log messages?19 log: bochsout.txt2021 # disable the mouse22 mouse: enabled=02324 # enable key mapping, using US layout as default.25 keyboard_mapping: enabled=1, map=/usr/share/bochs/keymaps/x11-pc-us.map

   For more detailed configuration, refer to the official documentation:

   Http://bochs.sourceforge.net/cgi-bin/topper.pl? Name = new + bochs + documentation & url = http://bochs.sourceforge.net/doc/docbook

(3) bochs debugging

Action	Command	Example
Set a breakpoint at a physical address	B ADDR	B 0x30400
Display All current breakpoint Information	Info break	Info break
Continue until a breakpoint occurs.	C	C
One-step execution	S	S
One-step execution (skip in case of a function)	N	N
View register information	Info CPU R Fp Sreg CREG	Info CPU R Fp Sreg CREG
View stacks	Print-Stack	Print-Stack
View memory physical address content	XP/nuf ADDR	XP/40bx 0x9013e
View linear address content	X/nuf ADDR	X/40bx 0x13e
Disassemble a piece of memory	U start end	U 0x30400 0x3040d
Every instruction executed by Disassembly	Trace-on	Trace-on
CPU information is printed every time a command is executed.	Trace-Reg	Trace-Reg on