Re: [ECOS] Problem with hello ... entry point

[Gary Thomas <gthomas@redhat.com>]

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On Wed, 2001-09-05 at 17:04, Carlo Agostini wrote:
> Gary Thomas wrote:
> 
> > On 03 Sep 2001 17:18:39 +0200, Carlo Agostini wrote:
> > > Hi
> > >
> > > I have as soon as begun to use Redboot-eCos
> > > and wanted of the  suggestions.
> > >
> > >
> > > I have get the current version of eCos packages via CVS
> > > I type the following in RedHat 7.1
> > >
> > > ecosconfig new pc redboot
> > > ecosconfig import ../i386/pc/...../redboot_FLOPPY.ecm
> > > I do not use the memory flash
> > >
> > > make
> > >
> > >
> > > I 've successfully compiled both redboot.bin & redboot.elf
> > >
> > > Redboot runs from a floppy disk on 486 pc
> > >
> > > I have two PC (486 and Pentium)that communicates through serial port(I
> > > use the program minicom(on Pentium))
> > >
> > > I load with the serial port the compiled program hello with the tools
> > > of  i386-.
> > >
> > > I have loaded in memory RAM hello with the command load.
> > >
> > >
> > >
> > > Platform: PC (I386)
> > > Copyright (C) 2000, 2001, Red Hat, Inc.
> > >
> > > RAM: 0x00000000-0x000a0000, 0x00088680-0x000a0000 available
> > >
> > >
> > > load -v -r -m xmodem 0x00088680
> > >
> >
> > Don't use "raw" loads here.  Convert your ELF file to S-records using
> > 'objcopy -O srec' and then use the RedBoot load command without '-r'.
> >
> > >
> > > file loaded 0x00088680-0x00163f80
> > >
> > > Subsequently in memory I find
> > >
> > >
> > > du -b 0x00088680 -l 0xff
> > >
> > > 0x00088680: 7F45 4C46 0101 0100  0000 0000 0000 0000
> > > |.ELF............|
> > > 0x00088690: 0200 0300 0100 0000  0020 0000 3400 0000   |.........
> > > ..4...|
> > > 0x000886A0: 8C0B 0D00 0000 0000  3400 2000 0100 2800   |........4.
> > > ...(.|
> > > 0x000886B0: 1000 0D00 0100 0000  0010 0000 0020 0000   |.............
> > > ..|
> > > 0x000886C0: 0020 0000 4077 0100  E026 0200 0700 0000   |.
> > > ..@w...&......|
> > > 0x000886D0: 0010 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x000886E0: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x000886F0: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088700: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088710: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088720: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088730: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088740: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > > 0x00088750: 0000 0000 0000 0000  0000 0000 0000 0000
> > > |................|
> > >
> > >
> > > How I make to understand where is the entry point of the program hello ?
> > >
> > >
> > > Thanking you in advance.
> > >
> > > Carlo
> 
> Hi
> 
> If I try with load - v - m XMODEM
> 
> I do not succeed to transmit and I receive the following errors
> 
> 
> 
>  Retry 0: Got 52 for sector ACK
> Retry 0: NAK on sector
>           Retry 0: Got 20 for sector ACK
> RedBoot(t Retry 0: NAK on sector
>           Retry 0: Got 41 for sector ACK
>           Retry 0: Got 01 for sector ACK
> 
> I succeed to only load with the option
> 
> load -r -v -x modem -b 0x00088680
> 
> Thanking you in advance
> Carlo

You obviously are not sending the correct type of data.  You *MUST*
convert the file to S-records - ELF won't do.