x86_64 implementation of xv6
x86_64 implementation of Unix V6 x86 clone xv6.
Install
On x86_64 debian, you can emulate xv6.
sudo apt -y install build-essential gdb qemu-system
if you wnat to emulate on other os, check tools.
QEMU
You can test xv6-x86_64 on qemu emulator.
make qemu
GDB
If you want to doing gdb xv6, turn on 2 terminals then follow steps.
First terminal
gdb server will running on
make qemu-gdb
Second terminal
Add the gdb config.
echo "add-auto-load-safe-path $HOME/xv6-x86_64/.gdbinit" >> $HOME/.gdbinit
then go xv6-x86_64 drectory. do gdb!
~/xv6-x86_64$ gdb
Ping
You can test ICMP protocol on ping program on xv6.
# Compile
$ make
# Compile with debug print
$ XV6_CFLAGS="-DLWIP_DEBUG" make
# Run
$ make qemu
$ ls
. 1 1 512
.. 1 1 512
init 2 2 25432
preempttest1 2 3 25320
preempttest2 2 4 24688
fstest 2 5 33888
sh 2 6 48040
ls 2 7 32456
mkdir 2 8 24688
cat 2 9 26176
echo 2 10 25248
ln 2 11 24440
rm 2 12 24680
wc 2 13 32376
vatest 2 14 24968
socktest 2 15 51592
ping 2 16 63688
console 3 17 0
$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 36 bytes of data.
36 bytes from 8.8.8.8: icmp_seq=1 ttl=255 time=20 ms
36 bytes from 8.8.8.8: icmp_seq=2 ttl=255 time=20 ms
36 bytes from 8.8.8.8: icmp_seq=3 ttl=255 time=20 ms
The below is the original README of xv6.
README
xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). xv6 loosely follows the structure and style of v6, but is implemented for a modern x86-based multiprocessor using ANSI C.
ACKNOWLEDGMENTS
xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14, 2000)). See also https://pdos.csail.mit.edu/6.828/, which provides pointers to on-line resources for v6.
xv6 borrows code from the following sources: JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others) Plan 9 (entryother.S, mp.h, mp.c, lapic.c) FreeBSD (ioapic.c) NetBSD (console.c)
The following people have made contributions: Russ Cox (context switching, locking), Cliff Frey (MP), Xiao Yu (MP), Nickolai Zeldovich, and Austin Clements.
We are also grateful for the bug reports and patches contributed by Silas Boyd-Wickizer, Anton Burtsev, Cody Cutler, Mike CAT, Tej Chajed, eyalz800, Nelson Elhage, Saar Ettinger, Alice Ferrazzi, Nathaniel Filardo, Peter Froehlich, Yakir Goaron,Shivam Handa, Bryan Henry, Jim Huang, Alexander Kapshuk, Anders Kaseorg, kehao95, Wolfgang Keller, Eddie Kohler, Austin Liew, Imbar Marinescu, Yandong Mao, Matan Shabtay, Hitoshi Mitake, Carmi Merimovich, Mark Morrissey, mtasm, Joel Nider, Greg Price, Ayan Shafqat, Eldar Sehayek, Yongming Shen, Cam Tenny, tyfkda, Rafael Ubal, Warren Toomey, Stephen Tu, Pablo Ventura, Xi Wang, Keiichi Watanabe, Nicolas Wolovick, wxdao, Grant Wu, Jindong Zhang, Icenowy Zheng, and Zou Chang Wei.
The code in the files that constitute xv6 is Copyright 2006-2018 Frans Kaashoek, Robert Morris, and Russ Cox.
ERROR REPORTS
We switched our focus to xv6 on RISC-V; see the mit-pdos/xv6-riscv.git repository on github.com.
BUILDING AND RUNNING XV6
To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run "make". On non-x86 or non-ELF machines (like OS X, even on x86), you will need to install a cross-compiler gcc suite capable of producing x86 ELF binaries (see https://pdos.csail.mit.edu/6.828/). Then run "make TOOLPREFIX=i386-jos-elf-". Now install the QEMU PC simulator and run "make qemu".