2009/4/6 <l4-hackers-request@os.inf.tu-dresden.de>

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Today's Topics:

1. Re: Urgent help needed .. for svn revision 444 . it seems to
a bug.. please solve as soon as possible. (Bj?rn D?bel)
2. Re: Urgent help needed>> please tell us what menu.lst do we
need for usbhid application (Bj?rn D?bel)
3. Re: USB Keyboard and l4con (Alexander Valitov)
4. l4ts_free_task() (Marcel Selhorst)
5. time problem (fang zhengshu)
6. Re: time problem (Bj?rn D?bel)
7. Re: l4ts_free_task() (Alexander Boettcher)

----------------------------------------------------------------------

Message: 1
Date: Sun, 05 Apr 2009 17:24:31 +0200
From: Bj?rn D?bel <doebel@os.inf.tu-dresden.de>
To: tapas kundu <tapaskundu1@gmail.com>, L4 Hackers
<l4-hackers@os.inf.tu-dresden.de>
Subject: Re: Urgent help needed .. for svn revision 444 . it seems to
a bug.. please solve as soon as possible.
Message-ID: <49D8CD2F.6090205@os.inf.tu-dresden.de>
Content-Type: text/plain; charset=windows-1252

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

first of all, please do not double-post.

> root@tapas-laptop:/home/tapas/tudos/l4# gcc --version
^^^^
There is absolutely no reason to build L4 as root user.

> gcc (Ubuntu 4.3.2-1ubuntu12) 4.3.2

No problem with that. I'm building with the same compiler.

> [..]
> $svn up dope

Better use the repomgr to checkout DOpE:
./repomgr co dope

> [..]
>
> /home/tapas/tudos/l4/pkg/loader/examples/fprov-l4/main.c -o main.o
> In function ?open?,
> inlined from ?l4fprov_file_ext_write_component? at
> /home/tapas/tudos/l4/pkg/loader/examples/fprov-l4/main.c:117:
> /usr/include/bits/fcntl2.h:51: error: call to ?__open_missing_mode?
> declared with attribute error: open with O_CREAT in second argument
> needs 3 arguments
> make[5]: *** [main.o] Error 1
> make[5]: Leaving directory
> `/home/tapas/5thAprilUserbuild/pkg/loader/examples/fprov-l4/OBJ-x86_586-l4v2'
> make[4]: *** [/home/tapas/5thAprilUserbuild/pkg/loader/examples/fprov-l4/OBJ-x86_586-l4v2]
> Error 2
> make[4]: Leaving directory `/home/tapas/tudos/l4/pkg/loader/examples/fprov-l4'
> make[3]: *** [fprov-l4] Error 2
> make[3]: Leaving directory `/home/tapas/tudos/l4/pkg/loader/examples'
> make[2]: *** [examples] Error 2
> make[2]: Leaving directory `/home/tapas/tudos/l4/pkg/loader'
> make[1]: *** [loader.bin] Error 2
> make[1]: Leaving directory `/home/tapas/tudos/l4/pkg'
> make: *** [pkg] Error 2

Seems there were some modifications to fprov-l4 recently which may be
the cause. You can ignore this for now (using your patch) as you won't
need this program.

> [..]
>
> ... Generating simpleterm.dpi
> LD_PRELOAD=/home/tapas/5thAprilUserbuild/tool/gendep/libgendep.so
> GENDEP_TARGET=simpleterm.dpi GENDEP_BINARY=perl
> /home/tapas/tudos/l4/tool/gen_dopecode/gen_dopecode
> /home/tapas/tudos/l4/pkg/dope/examples/dopecmd/common/simpleterm.dpe
>> simpleterm.dpi
> /bin/bash: /home/tapas/tudos/l4/tool/gen_dopecode/gen_dopecode: No
> such file or directory
> make[6]: *** [simpleterm.dpi] Error 127
> make[6]: Leaving directory
> `/home/tapas/5thAprilUserbuild/pkg/dope/examples/dopecmd/l4/OBJ-x86_586-l4v2'
> make[5]: *** [/home/tapas/5thAprilUserbuild/pkg/dope/examples/dopecmd/l4/OBJ-x86_586-l4v2]
> Error 2
> make[5]: Leaving directory `/home/tapas/tudos/l4/pkg/dope/examples/dopecmd/l4'
> make[4]: *** [l4] Error 2
> make[4]: Leaving directory `/home/tapas/tudos/l4/pkg/dope/examples/dopecmd'
> make[3]: *** [dopecmd] Error 2
> make[3]: Leaving directory `/home/tapas/tudos/l4/pkg/dope/examples'
> make[2]: *** [examples] Error 2
> make[2]: Leaving directory `/home/tapas/tudos/l4/pkg/dope'
> make[1]: *** [dope.bin] Error 2
> make[1]: Leaving directory `/home/tapas/tudos/l4/pkg'
> make: *** [pkg] Error 2
> root@tapas-laptop:/home/tapas/tudos/l4#
>
>
> This seems to me that some files are not available or deleted from svn

No. It is there. You can manually fix this by going to l4/tool and
running "svn up gen_dopecode". Otherwise you may use the repomgr to
checkout DOpE as described above and it will do this automatically.

Cheers,
Bjoern
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------------------------------

Message: 2
Date: Sun, 05 Apr 2009 17:30:52 +0200
From: Bj?rn D?bel <doebel@os.inf.tu-dresden.de>
To: tapas kundu <tapaskundu1@gmail.com>
Cc: l4-hackers@os.inf.tu-dresden.de
Subject: Re: Urgent help needed>> please tell us what menu.lst do we
need for usbhid application
Message-ID: <49D8CEAC.2020700@os.inf.tu-dresden.de>
Content-Type: text/plain; charset=ISO-8859-1

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

again, there is no need to double post.

> We are student of IIT Delhi. We are trying to build a usb
> webcam application and ext2 file system driver on L4. We have seen an
> *application
> USBHID directory* under L4/pkg downloaded from svn . Could anybody let us
> know how to use this application. Please also let us know the required
> menu.lst file to use this application .

>
> 1) Please also describe required menu.lst file to use dde,
> dde_linux26, dope, drop,loader together .

You may find our Wiki at http://wiki.tudos.org/Main_Page a useful
resource for some initial reading.

> 2) Could any body tell us what is the difference between dde
> and dde_linux26 application found in svn ?

dde_linux26 (combined with linux-26-headers) is the older version which
is deprecated by the re-implementation found in the dde package.
However, the L4IDE disk driver you might be interested in, relies on
this old version.

> 3) Please also tell us how to use these to build an usb device
> driver.

Depending on what you are trying to learn, you can either
1) build a Linux USB driver, link it against the DDE/Linux libraries and
run it on L4, or
2) build a L4Env device driver based on DDEKit (l4/pkg/dde/ddekit). The
interface is slightly different, but if you know how to do things in
Linux, you'll quickly find that it is basically the same way using DDEKit.

Cheers,
Bjoern
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------------------------------

Message: 3
Date: Sun, 5 Apr 2009 08:44:23 -0700 (PDT)
From: Alexander Valitov <valitov79@mail.ru>
To: l4-hackers@os.inf.tu-dresden.de
Subject: Re: USB Keyboard and l4con
Message-ID: <22895190.post@talk.nabble.com>
Content-Type: text/plain; charset=us-ascii

Hi, Adam

> On Wed Apr 01, 2009 at 01:11:28 -0700, Alexander Valitov wrote:
> > I've got the problem. l4con doesn't work with USB keyboard.
> > It occurs with L4linux+l4con and even with simple txtmode con
> applications.
> > "USB legacy support" is turned on.
> > Here is how l4con complains:
> >
> > C.05:con | atkbd.c: Unknown key pressed (translated set 2, code 0x66
> on
> is
> > a0060/
> > C.05:con : serio0).
> > C.05:con | atkbd.c: Use 'setkeycodes 66 <keycode>' to make it
> known.
> > C.05:con | atkbd.c: Unknown key pressed (translated set 2, code
> 0x66
> > on is
> > a0060/
>
> Doesn't work at all or just when you press some (specific) key(s)?

When a application have started and is waiting for your input there are no
error messages. But if a first (ANY) key is pressed then the application
goes
mad and errors as above appear at log.

E.g.: I've booted the L4Linux and am going to input login name. I'm pressing
'r' which is first for 'root' and get something like this:
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr (lots of 'r'
following by CR)

Best Regards,
Alexander Valitov
--
View this message in context: http://www.nabble.com/USB-Keyboard-and-l4con-tp22821747p22895190.html
Sent from the L4 mailing list archive at Nabble.com.

------------------------------

Message: 4
Date: Sun, 05 Apr 2009 14:41:12 +0200
From: Marcel Selhorst <m.selhorst@sirrix.com>
To: "l4-hackers@os.inf.tu-dresden.de"
<l4-hackers@os.inf.tu-dresden.de>
Subject: l4ts_free_task()
Message-ID: <49D8A6E8.6090001@sirrix.com>
Content-Type: text/plain; charset=ISO-8859-15

Hi List,

I have another question regarding L4Linux and IPC.
Whenever I perform IPC-communication, I get the following debug output:

l4lx| l4ts_free_task(): Could not return task.

This message is repeated twice on every IPC-call.
What is the cause of this and how do I get rid of this? ;)

Thanks in advance!
Marcel Selhorst
--
Sirrix AG security technologies - http://www.sirrix.com
Marcel Selhorst eMail: m.selhorst@sirrix.com
Tel +49(234) 61 0071-199 Fax +49(234) 61 0071-599
get my public key from keyserver, key id: 0x7C9821CC
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------------------------------

Message: 5
Date: Mon, 6 Apr 2009 12:16:21 +0800
From: fang zhengshu <fangzhsh07@gmail.com>
To: send_question <l4-hackers@os.inf.tu-dresden.de>
Subject: time problem
Message-ID:
<a73d246f0904052116k2b5d4640q3d66bf1a6ea2c554@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

hi all,
I write a simple test example about time function.but when I use the
"time()" function,the code can not be compiled correctly.
I just have include the <time.h>,any question?
the error I put following:
l4@192:~/tudos/l4/pkg/test_fifo/examples/client$ make
PWD=/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
make -C /home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
-f Makefile
make[1]: Entering directory
`/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2'
... Compiling main.o
LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
GENDEP_TARGET=main.o GENDEP_BINARY=cc1 gcc -m32 -c -DUSE_UCLIBC=y
-DRAM_BASE=0x0 -DSYSTEM_x86_586_l4v2 -DARCH_x86 -DCPUTYPE_586
-DL4API_l4v2 -DCONFIG_L4_CALL_SYSCALLS -DCONFIG_L4_ABS_SYSCALLS
-I/home/l4/tudos/build/pkg/test_fifo/idl/OBJ-x86-l4v2
-I/home/l4/tudos/build/include/x86/l4v2 -I/home/l4/tudos/build/include/l4v2
-I/home/l4/tudos/build/include/x86 -I/home/l4/tudos/build/include
-I/home/l4/tudos/l4/../dice/include -I/home/drops/include/x86/l4v2
-I/home/drops/include/l4v2 -I/home/drops/include/x86 -I/home/drops/include
-nostdinc -I/home/l4/tudos/build/include/x86/uclibc
-I/home/l4/tudos/build/include/uclibc
-I/home/l4/tudos/build/include/uclibc++ -I/home/drops/include/x86/uclibc
-I/home/drops/include/uclibc -I/home/drops/include/uclibc++
-I/usr/lib/gcc/i486-linux-gnu/4.2.4/include
-I/usr/lib/gcc/i486-linux-gnu/4.2.4/include-fixed -gstabs+ -g -O2
-fno-strict-aliasing -march=i586 -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wmissing-declarations -fno-common
-fno-stack-protector /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c
-o main.o
==> Linking test_fifo-client
LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
GENDEP_TARGET=test_fifo-client GENDEP_BINARY=ld GENDEP_BINARY_ALT1=ld ld -m
elf_i386 -o test_fifo-client /home/l4/tudos/build/lib/x86_586/crt0.o main.o
test-client.o -Ttext=0x1100000 --hash-style=sysv
-L/home/l4/tudos/build/lib/x86_586/l4v2 -L/home/l4/tudos/build/lib/x86_586
-L/home/l4/tudos/build/lib -L/home/drops/lib/x86_586/l4v2
-L/home/drops/lib/x86_586 -L/home/drops/lib
-T/home/l4/tudos/build/lib/x86_586/main_stat.ld -static -lgeneric_ts
-ll4env -ll4rm -ldm_generic -ldm_mem -lthread -lsemaphore
-llogserver_capsule -lnames -ll4util_root -ll4util -lsigma0 -lroot -ll4env
-ll4env_err -ll4rm -ldm_generic -ldm_mem -lthread -lslab -ll4sys -nostdlib
-luc_c -luclibc_support -u mmap_anon -lc_be_simple_mem -lc_be_mmap
-lc_be_mmap_util -lc_be_l4env_start_stop -lc_be_minimal_log_io
-luc_be_simple_sleep -ll4env -llogserver_capsule -ll4rm -ldm_generic
-ldm_mem -lthread -lgeneric_ts -luc_c
/usr/lib/gcc/i486-linux-gnu/4.2.4/libgcc.a -luc_c -ll4sys -Ttext=0x1100000
--warn-common -gc-sections
main.o: In function `main':
/home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
reference to `time'
/home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:40: undefined
reference to `time'
/home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
reference to `time'
make[1]: *** [test_fifo-client] Error 1
make[1]: Leaving directory
`/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2'
make: ***
[/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2] Error
2

I have search the same error in l4-hackers ,someone suggest use rtc server,I
think it's a good idea.but I have found that the time() function in
time.h,why the error will happen?
The reason I just include time.h?

Thank you!

--
fang,
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Message: 6
Date: Mon, 06 Apr 2009 09:01:30 +0200
From: Bj?rn D?bel <doebel@os.inf.tu-dresden.de>
To: fang zhengshu <fangzhsh07@gmail.com>
Cc: L4 Hackers <l4-hackers@os.inf.tu-dresden.de>
Subject: Re: time problem
Message-ID: <49D9A8CA.6050500@os.inf.tu-dresden.de>
Content-Type: text/plain; charset=ISO-8859-1

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

> I write a simple test example about time function.but when I use the
> "time()" function,the code can not be compiled correctly.
> I just have include the <time.h>,any question?

Not quite correct. Including <time.h> only pulls the _declaration_ of
the time() function into your program. In order to actually use it, you
also need to have a _definition_ of this function available.

As your local C text book will tell you, there are two ways of getting
the definition of a function:
1) implement it in your code
2) link your program with a library providing this function

> the error I put following:
> l4@192:~/tudos/l4/pkg/test_fifo/examples/client$ make
> PWD=/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
> make -C /home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2
> -f Makefile
> make[1]: Entering directory
> `/home/l4/tudos/build/pkg/test_fifo/examples/client/OBJ-x86_586-l4v2'
> ... Compiling main.o
> LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
> GENDEP_TARGET=main.o GENDEP_BINARY=cc1 gcc -m32 -c -DUSE_UCLIBC=y
> -DRAM_BASE=0x0 -DSYSTEM_x86_586_l4v2 -DARCH_x86 -DCPUTYPE_586
> -DL4API_l4v2 -DCONFIG_L4_CALL_SYSCALLS -DCONFIG_L4_ABS_SYSCALLS
> -I/home/l4/tudos/build/pkg/test_fifo/idl/OBJ-x86-l4v2
> -I/home/l4/tudos/build/include/x86/l4v2 -I/home/l4/tudos/build/include/l4v2
> -I/home/l4/tudos/build/include/x86 -I/home/l4/tudos/build/include
> -I/home/l4/tudos/l4/../dice/include -I/home/drops/include/x86/l4v2
> -I/home/drops/include/l4v2 -I/home/drops/include/x86 -I/home/drops/include
> -nostdinc -I/home/l4/tudos/build/include/x86/uclibc
> -I/home/l4/tudos/build/include/uclibc
> -I/home/l4/tudos/build/include/uclibc++ -I/home/drops/include/x86/uclibc
> -I/home/drops/include/uclibc -I/home/drops/include/uclibc++
> -I/usr/lib/gcc/i486-linux-gnu/4.2.4/include
> -I/usr/lib/gcc/i486-linux-gnu/4.2.4/include-fixed -gstabs+ -g -O2
> -fno-strict-aliasing -march=i586 -Wall -Wstrict-prototypes
> -Wmissing-prototypes -Wmissing-declarations -fno-common
> -fno-stack-protector /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c
> -o main.o
> ==> Linking test_fifo-client
> LD_PRELOAD=/home/l4/tudos/build/tool/gendep/libgendep.so
> GENDEP_TARGET=test_fifo-client GENDEP_BINARY=ld GENDEP_BINARY_ALT1=ld ld -m
> elf_i386 -o test_fifo-client /home/l4/tudos/build/lib/x86_586/crt0.o main.o
> test-client.o -Ttext=0x1100000 --hash-style=sysv
> -L/home/l4/tudos/build/lib/x86_586/l4v2 -L/home/l4/tudos/build/lib/x86_586
> -L/home/l4/tudos/build/lib -L/home/drops/lib/x86_586/l4v2
> -L/home/drops/lib/x86_586 -L/home/drops/lib
> -T/home/l4/tudos/build/lib/x86_586/main_stat.ld -static -lgeneric_ts
> -ll4env -ll4rm -ldm_generic -ldm_mem -lthread -lsemaphore
> -llogserver_capsule -lnames -ll4util_root -ll4util -lsigma0 -lroot -ll4env
> -ll4env_err -ll4rm -ldm_generic -ldm_mem -lthread -lslab -ll4sys -nostdlib
> -luc_c -luclibc_support -u mmap_anon -lc_be_simple_mem -lc_be_mmap
> -lc_be_mmap_util -lc_be_l4env_start_stop -lc_be_minimal_log_io
> -luc_be_simple_sleep -ll4env -llogserver_capsule -ll4rm -ldm_generic
> -ldm_mem -lthread -lgeneric_ts -luc_c
> /usr/lib/gcc/i486-linux-gnu/4.2.4/libgcc.a -luc_c -ll4sys -Ttext=0x1100000
> --warn-common -gc-sections
> main.o: In function `main':
> /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
> reference to `time'
> /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:40: undefined
> reference to `time'
> /home/l4/tudos/l4/pkg/test_fifo/examples/client/main.c:36: undefined
> reference to `time'

This is what the linker is telling you here: I cannot find a definition
of time(), but i desparately need one.

> [..]
>
> I have search the same error in l4-hackers ,someone suggest use rtc server,I
> think it's a good idea.but I have found that the time() function in
> time.h,why the error will happen?
> The reason I just include time.h?

Indeed, the time() function is provided by libc_be_time, which comes as
part of the rtc package. So what you need to do is add

LIBS += -lc_be_time

to your Makefile.

Cheers,
Bjoern
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------------------------------

Message: 7
Date: Mon, 06 Apr 2009 09:48:09 +0200
From: Alexander Boettcher <boettcher@os.inf.tu-dresden.de>
To: L4 Hackers <l4-hackers@os.inf.tu-dresden.de>
Subject: Re: l4ts_free_task()
Message-ID: <49D9B3B9.4060701@os.inf.tu-dresden.de>
Content-Type: text/plain; charset="iso-8859-15"

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End of l4-hackers Digest, Vol 72, Issue 7
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