在armulator中移植uclinux.txt

在ARMulator中移植uClinuxGetting Familiar with uClinux/ARM 2.6 by Hyok S. Choi <[e-mail]

For linux-2.4.x, you should do “make dep” before “make”. But with linux-2.6.x, you don't need to.

It will compile the whole kernel and uclibc, user applications, and make the romfs.img.

The results

You should get the files in the image directory like:

[root@hyoklinux uClinux-dist]# ls -al images

total 3036 
drwxr-xr-x 2 root root 4096 Apr 27 22:13 . 
drwxr-xr-x 17 1000 users 4096 Apr 27 22:13 .. 
-rw-r--r-- 1 root root 1540272 Apr 27 22:13 image.bin 
-rwxr-xr-x 1 root root 45912 Apr 27 22:13 linux.data 
-rwxr-xr-x 1 root root 704856 Apr 27 22:13 linux.text 
-rw-r--r-- 1 root root 789504 Apr 27 22:13 romfs.img

[root@hyoklinux uClinux-dist]# ls -al linux-2.6.x/linux

-rwxr-xr-x 2 root root 15499433 Apr 27 22:11 linux-2.6.x/linux

If you see all the files, you've the whole kernel and rootfs image.

Let's play with it with ARMulator!

ARMulator installation

We need another directory to compile the GDB/ARMulator. However, this time, I'll install it in the uClinux-dist directory for temporary usage.

[root@hyoklinux uClinux-dist]# tar -jxvf ~/incoming/gdb-5.0.tar.bz2

And patch it!

[root@hyoklinux uClinux-dist]# gzip -dc ~/incoming/gdb-5.0-uclinux-armulator-20021127.patch.gz | patch -p0

And another one.

[root@hyoklinux uClinux-dist]# gzip -dc ~/incoming/gdb-5.0-uclinux-armulator-ramdisk-20040412.patch.gz | patch -p0

Okay, the codes are ready for compilation. Let's make it.

[root@hyoklinux uClinux-dist]# cd gdb-5.0/
[root@hyoklinux gdb-5.0]# ./configure –target=arm-elf
[root@hyoklinux gdb-5.0]# make
[root@hyoklinux gdb-5.0]# make install (be the root before this)

Running the ARMulator

Before run the ARMulator, we need a symbolic link to the rootfs image, “romfs.img”.

[root@hyoklinux gdb-5.0]# cd ..
[root@hyoklinux uClinux-dist]# ln -s images/romfs.img boot.rom

And if we make this initial script for GDB, it's convenient.

[root@hyoklinux uClinux-dist]# cat > .gdbinit
target sim
load
^D

That's all for our first kernel running. Let's do it!

[root@hyoklinux uClinux-dist]# arm-elf-gdb linux-2.6.x/linux

GNU gdb 5.0 
Copyright 2000 Free Software Foundation, Inc. 
GDB is free software, covered by the GNU General Public License, and you are 
welcome to change it and/or distribute copies of it under certain conditions. 
Type "show copying" to see the conditions. 
There is absolutely no warranty for GDB. Type "show warranty" for details. 
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-elf"... 
Loaded ROM boot.rom to 0x01300000 
Loaded ROM boot.rom to 0x01400000 
Loaded ROM boot.rom to 0x04000000 
Loaded ROM boot.rom to 0x01300000 
Loaded ROM boot.rom to 0x01400000 
Loaded ROM boot.rom to 0x04000000 
Connected to the simulator. 
Loading section .init, size 0xb000 vma 0x1000000 
Loading section .text, size 0xa0b98 vma 0x100b000 
Loading section __ex_table, size 0x5b8 vma 0x10abba0 
Loading section .data, size 0x8ef8 vma 0x10ae000 
Start address 0x1000000 
Transfer rate: 5931584 bits in <1 sec. 
(gdb) run 
Starting program: /uClinux-dist/linux-2.6.x/linux 
Linux version 2.6.5-hsc1 (root@hyoklinux) (gcc version 2.95.3 20010315 (release)(ColdFire patches - 20010318 from http://fiddes.net/coldfire/)(uClinux XIP and shared lib patches from http://www.snapgear.com/)) #9 Mon May 3 11:00:29 KST 2004 
CPU: Atmel-AT91M40xxx [14000040] revision 0 (ARMvundefined/unknown) 
Machine: ATMEL EB01 
On node 0 totalpages: 1024 
DMA zone: 0 pages, LIFO batch:1 
Normal zone: 1024 pages, LIFO batch:1 
HighMem zone: 0 pages, LIFO batch:1 
Built 1 zonelists 
Kernel command line: root=/dev/ram0 initrd=0x01300000,800K keepinitrd 
PID hash table entries: 32 (order 5: 256 bytes) 
Memory: 4MB = 4MB total 
Memory: 2448KB available (642K code, 92K data, 44K init) 
Calibrating delay loop... 15.87 BogoMIPS 
Dentry cache hash table entries: 1024 (order: 0, 4096 bytes) 
Inode-cache hash table entries: 1024 (order: 0, 4096 bytes) 
Mount-cache hash table entries: 512 (order: 0, 4096 bytes) 
checking if image is initramfs...it isn't (ungzip failed); looks like an initrd 
POSIX conformance testing by UNIFIX 
Linux NoNET1.0 for Linux 2.6 
Atmel USART driver version 0.99 
ttyS0 at 0xfffd0000 (irq = 2) is a builtin Atmel APB USART 
ttyS1 at 0xfffcc000 (irq = 3) is a builtin Atmel APB USART 
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize 
loop: loaded (max 8 devices) 
RAMDISK: romfs filesystem found at block 0 
RAMDISK: Loading 771 blocks [1 disk] into ram disk... done. 
VFS: Mounted root (romfs filesystem) readonly. 
Freeing init memory: 44K 
Shell invoked to run file: /etc/rc 
Command: host>Command: /bin/expand /etc/ramfs.img /dev/ram1 
Command: mount -t proc proc /proc 
Command: mount -t ext2 /dev/ram1 /var 
Command: mkdir /var/tmp 
Command: mkdir /var/log 
Command: mkdir /var/run 
Command: mkdir /var/lock 
Command: mkdir /var/empty 
Command: cat /etc/motd 
Welcome to 
____ _ _ 
/ __| ||_| 
_ _| | | | _ ____ _ _ _ _ 
| | | | | | || | _ \| | | |\ \/ / 
| |_| | |__| || | | | | |_| |/ \ 
| ___\____|_||_|_| |_|\____|\_/\_/ 
| | 
|_| 
 
GDB/ARMulator support by <[e-mail]> 
For further information check: 
http://www.uclinux.org/ 
 
Execution Finished, Exiting 
 
Sash command shell (version 1.1.1) 
/> ps 
PID PORT STAT SIZE SHARED %CPU COMMAND 
1 S 163K 0K 48.0 /sbin/init 
2 S 0K 0K 0.0 ksoftirqd/0 
3 S 0K 0K 1.0 events/0 
4 S 0K 0K 0.0 kblockd/0 
5 S 0K 0K 0.0 pdflush 
6 S 0K 0K 0.0 pdflush 
7 S 0K 0K 0.0 kswapd0 
8 S 0K 0K 0.0 aio/0 
11 S0 R 165K 0K 0.0 /bin/sh 
/> cd bin 
/bin> ls -al 
drwxr-xr-x 1 0 0 32 Jan 1 00:00 . 
drwxr-xr-x 1 0 0 32 Jan 1 00:00 .. 
-rwxr-xr-x 1 0 0 105980 Jan 1 00:00 boa 
-rwxr-xr-x 1 0 0 91104 Jan 1 00:00 dhcpcd 
-rwxr-xr-x 1 0 0 29624 Jan 1 00:00 expand 
-rwxr-xr-x 1 0 0 40504 Jan 1 00:00 gdbserver 
-rwxr-xr-x 1 0 0 73748 Jan 1 00:00 ifconfig 
-rwxr-xr-x 1 0 0 41144 Jan 1 00:00 inetd 
-rwxr-xr-x 1 0 0 31176 Jan 1 00:00 init 
-rwxr-xr-x 1 0 0 56380 Jan 1 00:00 login 
-rwxr-xr-x 1 0 0 64656 Jan 1 00:00 ping 
-rwxr-xr-x 1 0 0 34280 Jan 1 00:00 reboot 
-rwxr-xr-x 1 0 0 73860 Jan 1 00:00 route 
-rwxr-xr-x 1 0 0 79852 Jan 1 00:00 sh 
-rwxr-xr-x 1 0 0 51216 Jan 1 00:00 telnetd 
/bin> cat /proc/meminfo 
MemTotal: 2516 kB 
MemFree: 560 kB 
Buffers: 900 kB 
Cached: 188 kB 
SwapCached: 0 kB 
Active: 984 kB 
Inactive: 44 kB 
HighTotal: 0 kB 
HighFree: 0 kB 
LowTotal: 2516 kB 
LowFree: 560 kB 
SwapTotal: 0 kB 
SwapFree: 0 kB 
Dirty: 0 kB 
Writeback: 0 kB 
Mapped: 0 kB 
Slab: 752 kB 
Committed_AS: 0 kB 
PageTables: 0 kB 
VmallocTotal: 4194303 kB 
VmallocUsed: 0 kB 
VmallocChunk: 4194303 kB 
/bin>