some newbie questions

[sebastian ssmoller]

> Seb,
> objdump -f {elf-file-name} will show you the start address of your
> application Ed
>

this command gave me the following output:

seb at hadriel samples $ m68k-rtems-objdump -f hello.exe 

hello.exe:     file format elf32-m68k
architecture: m68k, flags 0x00000012:
EXEC_P, HAS_SYMS
start address 0x0001041c

so i downloaded the file again and called the start addr - nothing happened
:(

the board i use has a monitor with allows loading files, calling adresses,
disassambling ram a.s.o.

could it be possible that the hello.exe is not built for that kind of usage
? 

thx
regards,
seb

 
> sebastian ssmoller wrote:
> > 
> > hi,
> > i finally managed to download the hello.exe (as srec file) to my board.
> > usually now i would do "ca <addr>" to start the app.
> > 
> > using the linkcmds script i mapped the .text section to 0x10000 which
> > seemed to work.
> > 
> > S01700006F2D6F7074696D697A652F68656C6C6F2E65786528
> > S214010000FFC004000001041C0001040000010400FC
> > S21401001000010400000104000001040000010400C6
> > 
> > now, after having successfully downloaded the file, i expected to call
> >  0x10000 to start the app but nothing happens - the board immediately
> > hangs :(
> > 
> > i guess 0x10000 is not the correct entry point. i looked into the
> > start.S file and found a symbol named _CopyDataClearBSSAndStart (?)
> > 
> > How would i find out the correct entry point (jump addr) ?
> > 
> > thx
> > regards,
> > seb
> > 
> > (...)
> > 
> > > > >
> > > > >
> > > > >>sebastian ssmoller wrote:
> > > > >>
> > > > >>>hi,
> > > > >>>the hints u gave me so far helped me a lot. the last two days i
> > > > >read
> > > > >>>some more docs about rtems and managed to build the hello world
> > > > >>>sample
> > > > >>>for pc386 and boot it via grub :)
> > > > >>>
> > > > >>>then i build the hello world for gen68360 and tried to start it
> > > > >on>>an ip
> > > > >>>460 developer board (68040 + 68360). unfortunately i wasnt able
> > > > >to>>load
> > > > >>>the file (s-record file) over the serial line :(
> > > > >>>
> > > > >>>usually i would connect to the board (ip460mon) via terminal
> > > > >prog,>>use
> > > > >>>the "lo" command to download the s19 file and run "ca" to start
> > > > >the>>prog. when i try "lo" with the hello world app nothing
> > > > >happens. i>>mean:
> > > > >>>i send the file and when finished the board usually answers
> > > > >"what?"
> > > > >>>but
> > > > >>>it doesnt. i waited some minutes (10 min for 260k over 34800).
> > > > >>>
> > > > >>>the only thing i found out so far is that usually the srec file
> > > > >has>>s1
> > > > >>>records (generated with introl code compiler) but the rtems
> > > > >objcopy>>output has s2 records. i dont know whether it does matter
> > > > >(?)>>
> > > > >>>i would expect that even if the output format is not correct the
> > > > >>>download should just finish and possibly the "ca" would fail (?)
> > > > >>>
> > > > >>>does anyone have any ideas ?
> > > > >>>
> > > > >>>thx again
> > > > >>>regards,
> > > > >>>seb
> > > > >>
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > Joel Sherrill, Ph.D.             Director of Research & Development
> > > > joel at OARcorp.com                 On-Line Applications Research
> > > > Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> > > > Support Available                (256) 722-9985
> > > >
> > >
> > >
>