[U-Boot-Users] U-boot - vxWorks booting problems

Pierre AUBERT p.aubert at staubli.com
Wed Feb 26 13:19:39 CET 2003

Den Denov wrote:

> Hi all!
> I begin use U-Boot at my custom board  based on TQM823L module.
> It works fine.
> But I have problem with vxWorks image to boot it.
> Briefly. I compile vxWorks ram-based ELF image, make .bdx file from it and
> download BDX throught BDM using visionClick\visionICE.
> When I says "GO 100000" it works fine!
> After it I make binary image (using ElfToBin utility), make image from it
> using MKIMAGE utility from U_Boot, upload it to my target using u-boot
> serial interface, copy to flash - all ok.
> When I says "bootm 40040000". Image start to load ok, but after message
> "Starting vxWorks at 0x100000" target crashed.
> I try to make
> cp.b 40040040 (where actually image w\o header placed) 100000 $filesize
> its copied OK
> But "go 100000" cause crash again.
> I try set brakepoint at address 0x100000 and make step-by-step tracing. And
> wondering - code at 100000 after copy from flash looks different then I
> simple download BDX file through BDM before!
> I think something wrong with vxWorks binary image after ElfToBin.
> Please give me advices and suggestions about possible resolving my problem!
> Den.

Hi Den,
have you tried to make an image directly from the elf file (using mkimage).
I use u-boot to boot a QNX OS which is also contained in an elf image, and I
use mkimage on the elf file, then I use bootm on this image and it works fine.

Hoping this helps.

Best regards

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