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added some system calls and features to the XV6 operating system

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BUGS
BUGS
 
 
LICENSE
LICENSE
 
 
Makefile
Makefile
 
 
Notes
Notes
 
 
README
README
 
 
README.md
README.md
 
 
asm.h
asm.h
 
 
bio.c
bio.c
 
 
bootasm.S
bootasm.S
 
 
bootmain.c
bootmain.c
 
 
buf.h
buf.h
 
 
cat.c
cat.c
 
 
change_queue.c
change_queue.c
 
 
clear.c
clear.c
 
 
console.c
console.c
 
 
cuth
cuth
 
 
date.h
date.h
 
 
defs.h
defs.h
 
 
dot-bochsrc
dot-bochsrc
 
 
echo.c
echo.c
 
 
elf.h
elf.h
 
 
entry.S
entry.S
 
 
entryother.S
entryother.S
 
 
exec.c
exec.c
 
 
fcntl.h
fcntl.h
 
 
file.c
file.c
 
 
file.h
file.h
 
 
foo.c
foo.c
 
 
forktest.c
forktest.c
 
 
fs.c
fs.c
 
 
fs.h
fs.h
 
 
gdbutil
gdbutil
 
 
getchildren.c
getchildren.c
 
 
getgrandchildren.c
getgrandchildren.c
 
 
grep.c
grep.c
 
 
ide.c
ide.c
 
 
init.c
init.c
 
 
initcode.S
initcode.S
 
 
ioapic.c
ioapic.c
 
 
kalloc.c
kalloc.c
 
 
kbd.c
kbd.c
 
 
kbd.h
kbd.h
 
 
kernel.ld
kernel.ld
 
 
kill.c
kill.c
 
 
lapic.c
lapic.c
 
 
lcm.c
lcm.c
 
 
ln.c
ln.c
 
 
log.c
log.c
 
 
ls.c
ls.c
 
 
main.c
main.c
 
 
makefile_backup.txt
makefile_backup.txt
 
 
memide.c
memide.c
 
 
memlayout.h
memlayout.h
 
 
mkdir.c
mkdir.c
 
 
mkfs.c
mkfs.c
 
 
mmu.h
mmu.h
 
 
mp.c
mp.c
 
 
mp.h
mp.h
 
 
param.h
param.h
 
 
picirq.c
picirq.c
 
 
pipe.c
pipe.c
 
 
pr.pl
pr.pl
 
 
print_details.c
print_details.c
 
 
printf.c
printf.c
 
 
printpcs
printpcs
 
 
proc.c
proc.c
 
 
proc.h
proc.h
 
 
revnum.c
revnum.c
 
 
rm.c
rm.c
 
 
runoff
runoff
 
 
runoff.list
runoff.list
 
 
runoff.spec
runoff.spec
 
 
runoff1
runoff1
 
 
set_ratio_process.c
set_ratio_process.c
 
 
set_ratio_system.c
set_ratio_system.c
 
 
set_ticket.c
set_ticket.c
 
 
sh.c
sh.c
 
 
show1
show1
 
 
sign.pl
sign.pl
 
 
sleep1.p
sleep1.p
 
 
sleeplock.c
sleeplock.c
 
 
sleeplock.h
sleeplock.h
 
 
spinlock.c
spinlock.c
 
 
spinlock.h
spinlock.h
 
 
spinp
spinp
 
 
stat.h
stat.h
 
 
stressfs.c
stressfs.c
 
 
string.c
string.c
 
 
swtch.S
swtch.S
 
 
syscall.c
syscall.c
 
 
syscall.h
syscall.h
 
 
sysfile.c
sysfile.c
 
 
sysproc.c
sysproc.c
 
 
test.c
test.c
 
 
test_convar.c
test_convar.c
 
 
test_rwp.c
test_rwp.c
 
 
test_semaphore.c
test_semaphore.c
 
 
trap.c
trap.c
 
 
trapasm.S
trapasm.S
 
 
traps.h
traps.h
 
 

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XV6-Modified

XV6-Modified is an OS cloned from xv6 kernel with some new features . xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6).

New Features

Part 1 (Introduction to XV6):

  • Writing names
  • Added Ctrl+V, Ctrl+B, Ctrl+C, and Ctrl+X shortcuts.
  • Some user programs like lcm added.

Part 2 (System Calls) :

  • Added some system calls

Part 3 (Synchronization And Concurrency)

Part 4 (CPU Scheduling):

  • adding a multi-level feed back scheduler including :
    • Added multiple queue scheduling
    • Added RR, Lottery, and BJF algorithms
    • Added aging

How to use?

you can make this kernel using make command. also you can run this kernel on qemu virtual machine using make qemu command.

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added some system calls and features to the XV6 operating system

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