[ECOS] i386 problem

[ECOS] i386 problem

[Roland Caßebohm]

Hi,

I tried till long ago running an eCos application on the PC target again. 
Everything was working fine, but the application won't run :-(.

- Redboot is starting from floppy.
- gdb connects via net and via serial line.
- The application is builded for startup type RAM

$ ecosconfig new pc
$ ecosconfig tree
$ make
$ cd ex
$ i386-elf-gcc -c -o hello.o -g -Wall -I../install/include 
-ffunction-sections -fdata-sections hello.c
$ i386-elf-gcc -nostartfiles -L../install/lib -Wl,--gc-sections -o hello 
hello.o -Ttarget.ld -nostdlib

- loading the application works
target remote 192.168.1.155:9000
load
b main
c

-->

nothing is happen!

I have set a breakpoint at "hal_platform_init".
I can step till:

    // ISR table setup: plant the default ISR in all interrupt handlers
    // and the default interrupt VSR in the equivalent VSR table slots.
    for (vector = CYGNUM_HAL_ISR_MIN; vector <= CYGNUM_HAL_ISR_MAX; vector++)
    {
        cyg_uint32 index;
        HAL_TRANSLATE_VECTOR( vector, index );
here >> hal_interrupt_handlers[index] = (CYG_ADDRESS) HAL_DEFAULT_ISR;
        HAL_VSR_SET( vector, &__default_interrupt_vsr, NULL );
    }

but after vector is 70, the application stops at this line.

(the same over serial line)

Does anybody know what's going wrong?

Roland

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Re: [ECOS] i386 problem

[Jonathan Larmour]

Roland Caßebohm wrote:
> 
> Hi,
> 
> I tried till long ago running an eCos application on the PC target again.
> Everything was working fine, but the application won't run :-(.
> 
> - Redboot is starting from floppy.
> - gdb connects via net and via serial line.
> - The application is builded for startup type RAM
> 
> $ ecosconfig new pc
> $ ecosconfig tree
> $ make
> $ cd ex
> $ i386-elf-gcc -c -o hello.o -g -Wall -I../install/include
> -ffunction-sections -fdata-sections hello.c
> $ i386-elf-gcc -nostartfiles -L../install/lib -Wl,--gc-sections -o hello
> hello.o -Ttarget.ld -nostdlib
> 
> - loading the application works
> target remote 192.168.1.155:9000
> load
> b main
> c
> 
> -->
> 
> nothing is happen!
> 
> I have set a breakpoint at "hal_platform_init".
> I can step till:
> 
>     // ISR table setup: plant the default ISR in all interrupt handlers
>     // and the default interrupt VSR in the equivalent VSR table slots.
>     for (vector = CYGNUM_HAL_ISR_MIN; vector <= CYGNUM_HAL_ISR_MAX; vector++)
>     {
>         cyg_uint32 index;
>         HAL_TRANSLATE_VECTOR( vector, index );
> here >> hal_interrupt_handlers[index] = (CYG_ADDRESS) HAL_DEFAULT_ISR;
>         HAL_VSR_SET( vector, &__default_interrupt_vsr, NULL );
>     }
> 
> but after vector is 70, the application stops at this line.
> 
> (the same over serial line)
> 
> Does anybody know what's going wrong?

Afraid not off-hand, but since interrupts should be disabled at this stage
of initialization, these lines shouldn't be problematic. But just supposing
interrupts are enabled, then it should be the HAL_VSR_SET that would make
it go wrong. Vector 70 should be unused, but perhaps there's something else
using it. Perhaps see where it is pointing at before it crashes.

And make sure you're using an up-to-date redboot image (e.g. from
http://sources.redhat.com/ecos/boards/redbootbins/ )

Jifl
-- 
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--[ "You can complain because roses have thorns, or you ]--
--[  can rejoice because thorns have roses." -Lincoln   ]-- Opinions==mine

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[ECOS] RE: eCos Loader

[David Bonfrer]

Hi,

I'm using ELF executable and shared libs.

I know that *diag_printf points to the function diag_printf.

The question is: How do I get this in general?

I don't want to fill my own tables with:

If ("printf"){location = *printf}
If ("scanf") {location = *scanf}
Etc. Can I get a symbol table from eCos for these functionsymbols?

Thanks.

P.S. Anthony, I am in a starting stage for this loader. 

I'm not ready to put it here because it's not finished and it's not very
readable source code yet. 

-----Original Message-----
From: Anthony Tonizzo [mailto:atonizzo@lycos.com] 
Sent: dinsdag 26 april 2005 22:45
To: ecos@bonfrer.com
Subject: eCos Loader

Hi:

I am working on an ecos loader too.

Following some conversations with Nick Garnett on the subject,
I wanted to create an interface that was more similar to Linux
insmod() that to a shared library. In this case, your module
gets compiled with a simple 

gcc -c hello.c

and then the loader must act as linker, and resolve relocation
and references.

I am still involved in the project, but I disagree with DeRocco:
Inventing your own linker format is a bad idea. Because you now
have to use special linkers to compile your module, or worse you
have to write one. eCos libraries are ELF modules, and so should
the libraries.

As far as resolving external symbols, the only valid approach is
a table of this type:

struct
{
    char*   symbol_name;
    void (*fp)(void);
} symbol;

symbol symbol_table[] = { { "diag_printf", diag_printf }, ...

which you can then fill up with the values of the functions you need.
Since this table would be in memory all the time, you can selectively
eliminate the functions you do not need via a CDL option or some
other form of compile time option (for example, you only have
pointers for kernel and semaphores, and nothing else). This should
help in getting a handle on an otherwise huge table.

In my application, I do not need to call external functions, but I
definitely need relocation and symbol resolution. How far away is your
code from prime time? Can I take a look at it to see if I can use it
(and act as a beta tester in the process)?

I am sorry if I replied to you personally, but the ecoscentric reflector
does not seem to like my posting when I am behind my company's
firewall.

Regards
Tony
-- 
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[ECOS] i386 problem

[Gonçalo Antunes]

Hi

I started my config.ecc with the i386realtek template.
added the HTTP, CPuload, FreeBSD, networking, and common ethernet packages..
and when I do the 'make tests" I get an error...

I'm using the startup method 'FLOPPY' and I get the following error:

/home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined reference
to 'hal_saved_interrupt_state'
make: leaving directory '/home/gmma/config_build'
collect2: ld returned 1 exit status

if  I  change the startup method to RAM, the error does not appear...
I really need to have it running from the FLOPPY...



Can you help?

Thank you very much.

Gonçalo Antunes.




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Re: [ECOS] i386 problem

[Andrew Lunn]

On Wed, Apr 27, 2005 at 01:20:52AM +0100, Gon?alo Antunes wrote:
> Hi
> 
> I started my config.ecc with the i386realtek template.
> added the HTTP, CPuload, FreeBSD, networking, and common ethernet packages..

Use the net template as a basis and then add http and cpuload. 

This might help, but it might not. 

> and when I do the 'make tests" I get an error...
> 
> I'm using the startup method 'FLOPPY' and I get the following error:
> 
> /home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined reference
> to 'hal_saved_interrupt_state'
> make: leaving directory '/home/gmma/config_build'
> collect2: ld returned 1 exit status
> 
> if  I  change the startup method to RAM, the error does not appear...
> I really need to have it running from the FLOPPY...

What have you found out while debugging the problem? Its been a few
days since you posted this the first time so you have had time to do
lots of testing....

        Andrew

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Re: [ECOS] i386 problem

[Gonçalo Antunes]

Hello again!

I tried to start with a plain net template, changed the HAL_STARTUP to 
FLOPPY and the error on the "make tests" is the same:

>>/home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined 
>>reference
>> to 'hal_saved_interrupt_state'
>> make: leaving directory '/home/gmma/config_build'
>> collect2: ld returned 1 exit status


If I put it to RAM, it works fine...

When I first installed ecos (without any CVS update), the FLOPPY startup 
worked fine...

What can I do?


Thank You very much.


----- Original Message ----- 
From: "Andrew Lunn" <andrew@lunn.ch>
To: "Gon?alo Antunes" <gmma@gmma.net>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Wednesday, April 27, 2005 6:34 AM
Subject: Re: [ECOS] i386 problem


> On Wed, Apr 27, 2005 at 01:20:52AM +0100, Gon?alo Antunes wrote:
>> Hi
>>
>> I started my config.ecc with the i386realtek template.
>> added the HTTP, CPuload, FreeBSD, networking, and common ethernet 
>> packages..
>
> Use the net template as a basis and then add http and cpuload.
>
> This might help, but it might not.
>
>> and when I do the 'make tests" I get an error...
>>
>> I'm using the startup method 'FLOPPY' and I get the following error:
>>
>> /home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined 
>> reference
>> to 'hal_saved_interrupt_state'
>> make: leaving directory '/home/gmma/config_build'
>> collect2: ld returned 1 exit status
>>
>> if  I  change the startup method to RAM, the error does not appear...
>> I really need to have it running from the FLOPPY...
>
> What have you found out while debugging the problem? Its been a few
> days since you posted this the first time so you have had time to do
> lots of testing....
>
>        Andrew
> 



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Re: [ECOS] i386 problem

[Gonçalo Antunes]

Hello.

I installed eCos again, updated the repository and built some tests again...
The problem is really, as Andrew Lunn said, when linking with the pci tests.
Everything is alright when HAL_STARTUP is not the Floppy...

Is there a way to have a .ecc file with network support and http to run from 
a floppy? what are the packages needed to do this? How can I check the image 
size so I can fit it to a floppy?

Thank you.

Gonçalo Antunes.



----- Original Message ----- 
From: "Andrew Lunn" <andrew@lunn.ch>
To: "Gon?alo Antunes" <gmma@gmma.net>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Saturday, April 30, 2005 6:18 PM
Subject: Re: [ECOS] i386 problem


> On Sat, Apr 30, 2005 at 04:32:27AM +0100, Gon?alo Antunes wrote:
>> Hello again!
>>
>> I tried to start with a plain net template, changed the HAL_STARTUP to
>> FLOPPY and the error on the "make tests" is the same:
>>
>> >>/home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined
>> >>reference
>> >>to 'hal_saved_interrupt_state'
>> >>make: leaving directory '/home/gmma/config_build'
>> >>collect2: ld returned 1 exit status
>
> I tried this myself:
>
> $ ecosconfig new pc_rltk8139 net
> $ emacs ecos.ecc - FLOPPY startup
> $ ecosconfig tree
> $ make -s
> headers finished
> build finished
>
> $ make tests
>
> this bombs when linking the pci tests becasue the floppy startup has
> restribted memory and the image is too big:
>
> make[1]: Entering directory `/home/lunn/eCos/work/io/pci/current'
> i386-elf-gcc -L/home/lunn/eCos/work/install/lib -Ttarget.ld -o 
> /home/lunn/eCos/work/install/tests/io/pci/current/tests/pci1 
> tests/pci1.o -g -nostdlib -Wl,--gc-sections -Wl,-static
> /opt/ecos/gnutools/i386-elf/bin/../lib/gcc-lib/i386-elf/3.2.1/../../../../i386-elf/bin/ld: 
> address 0xbc1f8 of 
> /home/lunn/eCos/work/install/tests/io/pci/current/tests/pci1 section .bss 
> is not within region ram
> /opt/ecos/gnutools/i386-elf/bin/../lib/gcc-lib/i386-elf/3.2.1/../../../../i386-elf/bin/ld: 
> address 0xbc1f8 of 
> /home/lunn/eCos/work/install/tests/io/pci/current/tests/pci1 section .bss 
> is not within region ram
> collect2: ld returned 1 exit status
>
> However if i do:
>
> lunn@londo:~/eCos/work$ (cd hal/common/current/ ; make tests)
> i386-elf-gcc -c  -I/home/lunn/eCos/work/install/include -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current 
>  -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/src -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests 
>  -I. -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/ -finline-limit=7000 
>  -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef  -g -O2 -ffunction-sections 
>  -fdata-sections  -fno-exceptions   -Wp,-MD,tests/context.tmp -o 
> tests/context.o 
> /home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/context.c
> i386-elf-gcc -L/home/lunn/eCos/work/install/lib -Ttarget.ld -o 
> /home/lunn/eCos/work/install/tests/hal/common/current/tests/context 
> tests/context.o -g -nostdlib -Wl,--gc-sections -Wl,-static
> i386-elf-gcc -c  -I/home/lunn/eCos/work/install/include -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current 
>  -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/src -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests 
>  -I. -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/ -finline-limit=7000 
>  -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef  -g -O2 -ffunction-sections 
>  -fdata-sections  -fno-exceptions   -Wp,-MD,tests/basic.tmp -o 
> tests/basic.o 
> /home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/basic.c
> i386-elf-gcc -L/home/lunn/eCos/work/install/lib -Ttarget.ld -o 
> /home/lunn/eCos/work/install/tests/hal/common/current/tests/basic 
> tests/basic.o -g -nostdlib -Wl,--gc-sections -Wl,-static
> i386-elf-gcc -c  -I/home/lunn/eCos/work/install/include -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current 
>  -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/src -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests 
>  -I. -I/home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/ -finline-limit=7000 
>  -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef  -g -O2 -ffunction-sections 
>  -fdata-sections  -fno-exceptions   -Wp,-MD,tests/cache.tmp -o 
> tests/cache.o 
> /home/lunn/eCos/anoncvs-clean/packages/hal/common/current/tests/cache.c
> i386-elf-gcc -L/home/lunn/eCos/work/install/lib -Ttarget.ld -o 
> /home/lunn/eCos/work/install/tests/hal/common/current/tests/cache 
> tests/cache.o -g -nostdlib -Wl,--gc-sections -Wl,-static
>
> So the hal tests compile fine....
>
> Are you realy sure you have the latest code with no local changes?
>
>        Andrew
>
>
>
> -- 
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
>
> 



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Re: [ECOS] i386 problem

[Andrew Lunn]

On Mon, May 02, 2005 at 05:11:36PM +0100, Gon?alo Antunes wrote:
> Hello.
> 
> I installed eCos again, updated the repository and built some tests again...
> The problem is really, as Andrew Lunn said, when linking with the pci tests.
> Everything is alright when HAL_STARTUP is not the Floppy...
> 
> Is there a way to have a .ecc file with network support and http to run 
> from a floppy? what are the packages needed to do this? How can I check the 
> image size so I can fit it to a floppy?


The network stack allocates a lot of space for packet buffers. You can
control this with CYGPKG_NET_MEM_USAGE. I suggest you try different
sizes and see what works.

You can also try to use the lwip stack instead of the freebsd
stack. lwip is much smaller.

        Andrew

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Re: [ECOS] i386 problem

[Gonçalo Antunes]

Thank you, Mr. Andrew Lunn.
I will try to work around what you said.

Thanks.
I will get here back to you if I have any news.

Gonçalo Antunes.



----- Original Message ----- 
From: "Andrew Lunn" <andrew@lunn.ch>
To: "Gon?alo Antunes" <gmma@gmma.net>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Monday, May 02, 2005 5:29 PM
Subject: Re: [ECOS] i386 problem


> On Mon, May 02, 2005 at 05:11:36PM +0100, Gon?alo Antunes wrote:
>> Hello.
>>
>> I installed eCos again, updated the repository and built some tests 
>> again...
>> The problem is really, as Andrew Lunn said, when linking with the pci 
>> tests.
>> Everything is alright when HAL_STARTUP is not the Floppy...
>>
>> Is there a way to have a .ecc file with network support and http to run
>> from a floppy? what are the packages needed to do this? How can I check 
>> the
>> image size so I can fit it to a floppy?
>
>
> The network stack allocates a lot of space for packet buffers. You can
> control this with CYGPKG_NET_MEM_USAGE. I suggest you try different
> sizes and see what works.
>
> You can also try to use the lwip stack instead of the freebsd
> stack. lwip is much smaller.
>
>        Andrew
> 



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Re: [ECOS] i386 problem

[Nick Garnett]

Gonçalo Antunes <gmma@gmma.net> writes:

> Hello again!
> 
> I tried to start with a plain net template, changed the HAL_STARTUP to
> FLOPPY and the error on the "make tests" is the same:
> 
> >> /home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined
> >> reference
> >> to 'hal_saved_interrupt_state'
> >> make: leaving directory '/home/gmma/config_build'
> >> collect2: ld returned 1 exit status
> 
> 
> If I put it to RAM, it works fine...
> 
> When I first installed ecos (without any CVS update), the FLOPPY
> startup worked fine...
> 
> What can I do?

The main problem seems to be with the profiling support that Bart
added in March. I'll leave him to decide what to do about it in the
repository, but in the interim you could try moving the

#endif  // CYGPKG_PROFILE_GPROF

in hal_misc.c to just after the

#endif // SMP

I've not tried this, so I have no idea whether it will work.


However, FLOPPY startup only allows for applications that occupy the
lower 640k of RAM. Given all the packages you want to load, you may
find this a bit of a squeeze. You would be better off using the GRUB
startup type for large stand-alone programs, since these get loaded
into RAM above the 1Mb boundary.

During development, you should be using RedBoot and load RAM
applications. You should only switch to FLOPPY or GRUB startup when
you are ready to turn in to a product, not before.


-- 
Nick Garnett                                     eCos Kernel Architect
http://www.ecoscentric.com                The eCos and RedBoot experts


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Re: [ECOS] i386 problem

[Gonçalo Antunes]

Thank you, Mr. Nick Garnett.
I will try to do what you said.
I will now try to start using Redboot during the development.

Thank you again.

Gonçalo Antunes.



----- Original Message ----- 
From: "Nick Garnett" <nickg@ecoscentric.com>
To: "Gonçalo Antunes" <gmma@gmma.net>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Tuesday, May 03, 2005 11:14 AM
Subject: Re: [ECOS] i386 problem


Gonçalo Antunes <gmma@gmma.net> writes:

> Hello again!
>
> I tried to start with a plain net template, changed the HAL_STARTUP to
> FLOPPY and the error on the "make tests" is the same:
>
> >> /home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined
> >> reference
> >> to 'hal_saved_interrupt_state'
> >> make: leaving directory '/home/gmma/config_build'
> >> collect2: ld returned 1 exit status
>
>
> If I put it to RAM, it works fine...
>
> When I first installed ecos (without any CVS update), the FLOPPY
> startup worked fine...
>
> What can I do?

The main problem seems to be with the profiling support that Bart
added in March. I'll leave him to decide what to do about it in the
repository, but in the interim you could try moving the

#endif  // CYGPKG_PROFILE_GPROF

in hal_misc.c to just after the

#endif // SMP

I've not tried this, so I have no idea whether it will work.


However, FLOPPY startup only allows for applications that occupy the
lower 640k of RAM. Given all the packages you want to load, you may
find this a bit of a squeeze. You would be better off using the GRUB
startup type for large stand-alone programs, since these get loaded
into RAM above the 1Mb boundary.

During development, you should be using RedBoot and load RAM
applications. You should only switch to FLOPPY or GRUB startup when
you are ready to turn in to a product, not before.


-- 
Nick Garnett                                     eCos Kernel Architect
http://www.ecoscentric.com                The eCos and RedBoot experts




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Re: [ECOS] i386 problem

[Bart Veer]

>>>>> "Nick" == Nick Garnett <nickg@ecoscentric.com> writes:

    >> I tried to start with a plain net template, changed the HAL_STARTUP to
    >> FLOPPY and the error on the "make tests" is the same:
    >> 
    >> >> /home/gmma/config_install/lib/vectors.o:/tmp/ccfRQjJM.s: undefined
    >> >> reference to 'hal_saved_interrupt_state'

    Nick> The main problem seems to be with the profiling support that
    Nick> Bart added in March. I'll leave him to decide what to do
    Nick> about it in the repository, but in the interim you could try
    Nick> moving the

    Nick> #endif  // CYGPKG_PROFILE_GPROF

    Nick> in hal_misc.c to just after the

    Nick> #endif // SMP

    Nick> I've not tried this, so I have no idea whether it will work.

I don't think that is the problem. The #ifdef GPROF conditional
definition of hal_saved_interrupt_state is completely new, previously
the i386 arch hal never provided that variable. Instead it will
usually come from the common HAL's hal_if.c

I just tried a clean build from anoncvs for pc with the net template
and startup changed to floppy. Many of the tests build fine, there is
no problem with hal_saved_interrupt_state. As expected there are some
build failures relating to overflowing the ram region. I suspect the
original poster tried his experiment in an existing build tree and
things got very confused.

Bart

-- 
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http://www.ecoscentric.com/     The eCos and RedBoot experts


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