Babyos2

What have done at version 1.0 by 2018-05-12:

1.boot and load elf kernel, and protected mode

1. boot
2. load elf kernel
3. PM

2.simple draw characters by VBE

1. draw matrix font
2. kprintf, sprintf

3.exception and interrupt

1. exception, page fault
2. keyboard
3. ide hard disk
4. clock interrupt

4.memory manage:

1. buddy to manage physical memory
2. paging and page fault
3. vm_area and mmap
4. user stack and expand

4.process

1. fork and exec
2. user mode process
3. schedule
4. exit, wait
5. sleep, wakeup

5.file system

1. super block, inode, namei
2. open, read, write
3. mkdir, link, unlink
4. console
5. pipe
6. socket

6.lock

1. spin lock
2. semaphore

7.IPC

1. pipe
2. socket SOCK_LOCAL
3. signal

8.MP

1. MP config and MP boot
2. MP schedule

9.shell

1. simple command

10.network

1. PCI config and enumerate PCI buses
2. RTL8139 NIC
3. ethernet
4. arp
5. ipv4
6. icmp
7. SOCK_RAW, ping
8. UDP
9. DNS 10)SOCK_DGRAM, gethostbyname 11)TCP, SOCK_STREAM