About uClibc

[hkr2000]

Now in your version uClibc，it does not use the default makefile
system, but the new version have some problems in cygwin, could you
please use the default uClibc makefile system?

[Guo Hongruan]

What makes you say so?

--
Guo Hongruan, Embedded Linux Consultant
Mobile: +86-0-13484056007
Skype: camelguo
http://www.gulessoft.com

[freeoicq freeoicq]

I manage to compile the uclibc source after I change some code and copy some files to the includes directory, but the kernel run the app seems ok, except the following error, where "simple test" is my test app's printout, so I think it is the uclibc's problem:

TMLinux start!

start_kerneler

<5>Linux version 2.6.14.7-tiny1 (Boss@SWXA) () #38 Thu Oct 9 23:43:48 2008

<6>

TMLinux pnx1500 on nohhost with 64 bit float point (Little endian) supported by came...@gmail.com

<7>start_mem is 0x262000

virtual_end is 0x3a61000

<7>before free_area_init

<7>free_area_init -> start_mem is 0x262000

virtual_end is 0x3a61000

<7>On node 0 totalpages: 14945

<7>  DMA zone: 0 pages, LIFO batch:1

<7>  Normal zone: 14945 pages, LIFO batch:7

<7>  HighMem zone: 0 pages, LIFO batch:1

Built 1 zonelists

<5>Kernel command line: 

PID hash table entries: 256 (order: 8, 4096 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

<7>Mem_init: start=262000, end=3a61000

<6>Memory available: 56704k/57340k RAM.

<7>Calibrating delay loop... 171.21 BogoMIPS (lpj=856064)

Mount-cache hash table entries: 512

switch_to: from (0) to (1)

switch_to: from (1) to (2)

switch_to: from (2) to (1)

do_pre_smp_initcalls ok

populate_rootfs ok

switch_to: from (1) to (2)

switch_to: from (2) to (3)

switch_to: from (3) to (1)

switch_to: from (1) to (3)

switch_to: from (3) to (4)

switch_to: from (4) to (1)

<6>Linux NoNET1.0 for Linux 2.6

kernel\kthread.c: helper_init

switch_to: from (1) to (4)

switch_to: from (4) to (5)

switch_to: from (5) to (1)

kernel\ksysfs.c: ksysfs_init

fs\binfmt_tcs.c: init_tcs_binfmt

fs\locks.c: filelock_init

fs\binfmt_misc.c: init_misc_binfmt

fs\binfmt_script.c: init_script_binfmt

drivers\char\tty_io.c: tty_class_init

fs\bio.c: init_bio

drivers\char\misc.c: misc_init

drivers\block\genhd.c: genhd_device_init

switch_to: from (1) to (5)

switch_to: from (5) to (6)

switch_to: from (6) to (5)

switch_to: frm (5) to (1)

drivers\input\input.c: input_init

fs\pipe.c: init_pipe_fs

drivers\char\mem.c: chr_dev_init

kernel\user.c: uid_cache_init

kernel\params.c: param_sysfs_init

kernel\posix-timers.c: init_posix_timers

kernel\posix-cpu-timers.c: init_posix_cpu_timers

kernel\futex.c: init

mm\page_alloc.c: init_per_zone_pages_min

mm\pdflush.c: pdflush_init

switch_to: from (1) to (5)

switch_to: from (5) to (7)

switch_to: from (7) to (5)

switch_to: from (5) to (6)

switch_to: from (6) to (1)

switch_to: from (1) to (7)

switch_to: from (7) to (5)

switch_to: from (5) to (8)

switch_to: from (8) to (5)

switch_to: from (5) to (1)

mm\vmscan.c: kswapd_init

mm\tiny-shmem.c: init_tmpfs

fs\fcntl.c: fasync_init

fs\aio.c: aio_setup

switch_to: from (1) to (5)

switch_to: from (5) to (8)

switch_to: from (8) to (10)

switch_to: from (10) to (5)

switch_to: from (5) to (1)

fs\eventpoll.c: eventpoll_init

fs\devpts\inode.c: init_devpts_fs

fs\ramfs\inode.c: init_ramfs_fs

fs\romfs\inode.c: init_romfs_fs

drivers\char\random.c: rand_initialize

drivers\char\tty_io.c: tty_init

drivers\char\pty.c: pty_init

drivers\block\noop-iosched.c: noop_init

<6>io scheduler noop registered

drivers\input\mousedev.c: mousedev_init

<6>mice: PS/2 mouse device common for all mice

drivers\char\random.c: seqgen_init

do_basic_setup ok

sys_access ...

sys_access ok

free_initmem ok

run_init_process 1...

switch_to: from (1) to (10)

switch_to: from (10) to (1)

simple test

<0>Kernel panic - not syncing: Attempted to kill init!

2008/10/9 Guo Hongruan <guo.ho...@gulessoft.com>

[freeoicq freeoicq]

What's more, I think if we want to support tm1500 board, we must use windows's tcs to compile the kernel and sysroots, now, I change the kernel's makefile, just touch a depfile,

then the kernel would be made successly.Now the uclibc does not.

2008/10/10 freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

Empty depfile will break the complete build procedure. TCS Linux edtion
works OK.

在 Fri, 10 Oct 2008 09:06:41 +0800，freeoicq freeoicq <hkr...@gmail.com>
写道:

> What's more, I think if we want to support tm1500 board, we must use
> windows's tcs to compile the kernel and sysroots, now, I change the
> kernel's

> makefile, just touch a depfile,then the kernel would be made

[freeoicq freeoicq]

Yes, so the linux kernel could be built, now we need to build the uclibc in cygwin, but I have not success except I change some codes, but this make the app runs not correctly, so I think we need a uclibc for cygwin.

2008/10/10 Guo Hongruan <guo.ho...@gulessoft.com>

[freeoicq freeoicq]

The app run on tmsim does not exit correctly, it returns with "Kernel panic - not syncing: Attempted to kill init", I think there is something wrong with it.

Second, the busybox does not get compiled.

2008/10/10 freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

Standard Linux can not allow the init process to exit.

The init process can not exit, or else, you will get this panic.

If you want to dynamically load application which need to exit, you should
do like the following:

in the init process:

if(vfork()){
......
}else{
exece("my_app",......);
}

Then in my_app, you can exit normally.


On Mon, 13 Oct 2008 09:12:50 +0800, freeoicq freeoicq <hkr...@gmail.com>
wrote:

> The app run on tmsim does not exit correctly, it returns with "Kernel
> panic
> - not syncing: Attempted to kill init", I think there is something wrong

> with it.Second, the busybox does not get compiled.

[freeoicq freeoicq]

Ok， I know，then how about the busybox？

2008/10/13 Guo Hongruan <came...@gmail.com>

[Guo Hongruan]

I can compile busybox easily in my computer. Maybe you have not configure
it correctly. But I am not sure for I don't know your question.

On Mon, 13 Oct 2008 11:14:26 +0800, freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

What I mean is a full functionial busybox, first it should have a shell, and second some basic tools.I can compile the busybox if I do not select the functioal units.

2008/10/13 Guo Hongruan <came...@gmail.com>

[freeoicq freeoicq]

There is no vfork in the kernel?

2008/10/13 freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

你有没有一个完整的带busybox的版本啊？

2008/10/13 freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

I have not ported busybox just compiled it.

在 Mon, 13 Oct 2008 16:28:32 +0800，freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

Impossible. Read the source code carefully.

在 Mon, 13 Oct 2008 11:28:25 +0800，freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

I have not remove any files in this busybox. It should be full
functionial. But I have not enable some configuration options. Just
minimum configuration.

在 Mon, 13 Oct 2008 11:24:46 +0800，freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

I mangage to compile the full functional busybox，but with some error：

tmld warning : Archive .\libpwdgrp\libpwdgrp.a does not contain a symboltable (maybe created using ar iso. tmar?)

tmld error   : Duplicate symbol _fclose (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\usr

\lib\\libc.a:fclose.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _fgetc (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\usr\

lib\\libc.a:fgetc.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _fopen (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\usr\

lib\\libc.a:fopen.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _fscanf (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\usr

\lib\\libc.a:fscanf.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _isspace (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\us

r\lib\\libc.a:isspace.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _strtoul (in c:\tmwork\work_new\sysroots\pnx1500_nohost_uclibc\x86-linux2\..\\sysroot\us

r\lib\\libc.a:strtoul.o and c:\tmwork\TCS5.01\lib\tm3260\el\fp64\libam.dll)

tmld error   : Unresolved symbol _daemon (first referenced in .\debianutils\debianutils.a:start_stop_daemon.o)

tmld fatal   : c:\tmwork\TCS5.01\bin\tmld aborted due to errors

tmcc.exe: tmld command failed

make[1]: *** [busybox_unstripped] Error 1

make: *** [_all] Error 2

Boss@SWXA /cygdrive/c/tmwork/work_new/busybox

2008/10/13 Guo Hongruan <guo.ho...@gulessoft.com>

[freeoicq freeoicq]

我有个建议，可以把sh和init两个程序发布，他们有独立版本，可以简单编译。我这边编译出现下面的错误：

trimedia-gss-linux-tcs-pnx1500el_fp64-uclibc-gcc sh/sh2.o sh/sh1.o sh/sh3.o sh/s

h4.o sh/sh5.o sh/sh6.o -o sh

tmld error   : Duplicate symbol _getc (in sh\sh5.o and c:\tmwork\TCS5.01\lib\tm3

260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _printf (in sh\sh2.o and c:\tmwork\TCS5.01\lib\t

m3260\el\fp64\libam.dll)

tmld error   : Duplicate symbol _putc (in sh\sh5.o and c:\tmwork\TCS5.01\lib\tm3

260\el\fp64\libam.dll)

tmld error   : Unresolved symbol _environ (first referenced in sh\sh1.o)

tmld error   : Unresolved symbol _geteuid (first referenced in sh\sh1.o)

tmld error   : Unresolved symbol _sys_execve (first referenced in sh\sh3.o)

tmld error   : Unresolved symbol _times (first referenced in sh\sh3.o)

tmld fatal   : c:\tmwork\TCS5.01\bin\tmld aborted due to errors

tmcc.exe: tmld command failed

make: *** [sh] Error 1

还有一个问题请教一下，你在uClibc里面和trimedia-gss-linux-tcs-pnx1500el_fp64-uclibc-gcc脚本里面有symbolrename，不知有什么原则？

[Guo Hongruan]

Also, I have tried my best to avoid using any functions provided by TCS,
but it is impossible to remove it completely. So I have to include some
important part of TCS libraries which has some symbol conflicted with
uClibc. So I have to rename the symbols of uClibc. You can read TCS manual
for more details about symbolrename.

sh and init process uses lots of functions of uClibc and busybox. I don't
want to break the completeness of busybox.

在 Tue, 14 Oct 2008 09:03:42 +0800，freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

I know the funcion of symbolrename，I have a ideal that could solve the proble，since we just use some function of tcs， can we export what we use to avod include all the tcs lib？

2008/10/14 Guo Hongruan <came...@gmail.com>

[Guo Hongruan]

Export? Use dll export, Could you give me more hints

在 Tue, 14 Oct 2008 10:23:21 +0800，freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

What I said may not solve all problems， but could solve most of the problem。As you know，the tmar has a option d（Delete specified objects），with the tmar we could export some objects and replace some objects， than we reconstruct the lib and replace the standard lib， then there is no conflicts.

2008/10/14 Guo Hongruan <guo.ho...@gulessoft.com>

[freeoicq freeoicq]

And second, we could replace the libc and libam with our lib, I test it already, I think this could work well.

2008/10/14 freeoicq freeoicq <hkr...@gmail.com>

[Guo Hongruan]

Sorry, I still can not understand you completely. Could you describe your
idea more detail or give an example.

在 Tue, 14 Oct 2008 10:35:22 +0800，freeoicq freeoicq <hkr...@gmail.com>

[freeoicq freeoicq]

First you can extract all the objs in a lib, than rebuild a lib with necessary objs, delete the objs that not used, than you can get the lib that you need.

2008/10/14 Guo Hongruan <came...@gmail.com>

[Guo Hongruan]

In tmlinux, I tried to avoid touching any thing about TCS libraries for
the risk of modifing it is too large.

在 Wed, 15 Oct 2008 09:35:55 +0800，freeoicq freeoicq <hkr...@gmail.com>