Re: [ECOS] One question..

[anton yakovlev <antony at inbox dot ru>]

Gary Thomas wrote:

> On Sat, 2004-06-26 at 02:59, anton yakovlev wrote:
>  
>
> > Gary Thomas wrote:
> >    
> >
> > > On Fri, 2004-06-25 at 02:09, anton yakovlev wrote:
> > >      
> > >
> > > > Hi, all!
> > > >
> > > > I have a programm:
> > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > > > #include <stdio.h>
> > > > #include <cyg/kernel/kapi.h>
> > > >
> > > > void first(cyg_addrword_t threadData) {
> > > >
> > > >   (void) threadData;
> > > >   printf("the first thread\n");
> > > >
> > > > }
> > > >
> > > > static char stack_a[4096];
> > > > static cyg_thread thread_a;
> > > > static cyg_handle_t handle_a;
> > > >
> > > > void cyg_user_start(void) {
> > > >  
> > > >   cyg_thread_create(10, first, 0, "first", stack_a, 4096, &handle_a, 
> > > > &thread_a);
> > > >   cyg_thread_resume(handle_a);
> > > >
> > > > }
> > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > > > but when i try to executing it, i see only following:
> > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > > > RedBoot> load -r -m y -b 0x205000
> > > > Raw file loaded 0x00205000-0x00210500
> > > > xyzModem - CRC mode, 363(SOH)/0(STX)/0(CAN) packets, 3 retries
> > > > RedBoot> go 0x205000
> > > >        
> > > Why did you specify raw mode (-r)?  When you do this, RedBoot loads the 
> > > file directly into memory without any processing at all, probably not
> > > what you want to do.
> > >      
> > Because I upload exactly raw image.. neither elf-image, nor s-record..
> >    
>
> That's fine (many people make mistakes here, but you've not). 
>
> Was the program linked to load at 0x205000?  eCos programs are *not* 
> position independent and must be loaded to memory that matches how they
> are built/linked.
>  
Hm.. I did not think about this.. I use GNU ld with "-L <smth> 
-Wl,--gc-sections -nostartfiles -Ttarget.ld -nostdlib" flags.. Simple 
"hello, world" and some more complex programms work's properly.. How to 
check, which way the program was linked?..

PS: When I turn on full kernel debug, that my above programm work's 
fine.. but when I try to execute more complex multithreaded program, 
this programm failed while system initialization with "ASSERT FAIL: 
mutex.cxx cyg_bool Cyg_Mutex::lock()".. :(

> > > How did you create the file that's being downloaded?  Is it an 
> > > executable (ELF) image?  or possibly S-records?
> > >      
> > From elf-image using objcopy..
> >    
> >
> > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > > > i.e. thread want not to start.. Why so?..
> > > >
> > > > I have Falcom fx35xxlsi (based on NEC V850 processors family) platform 
> > > > with eCos 2.0.. I build eCos from the sources.. Maybe I have broken 
> > > > configuration?..
> > > >        


--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss