[U-Boot-Users] vxworks boot loader and u-boot's hello_world
wd at denx.de
Wed Jul 14 22:10:39 CEST 2004
In message <20040714125245.96433.qmail at web12821.mail.yahoo.com> you wrote:
> I need a standalone application to run on vxworks boot
> loader , on sbc8260.
No comment. [This is off topic here.]
> I tried to run u-boot example , hello_world , but it
> makes an exception , when tries to access a logical
> address.(MSR says i have supervisior privilege, so
> this is not because of instruction needed privilege)
This cannot work. U-Boot standalone applications cannot be run in a
different environment. They make use of certain services provided by
U-Boot like a dynamically linked application relies on services
provided by some shared libraries.
> I think this is due to lack of logical addresses
> provided by vxworks boot loader, as hello_world is
> configured to use logical addresses provided by
I don't understand exactly what you mean here, since U-Boot does not
use any virtual memory, so all addresses are physical addresses only.
> can anyone help me?am i right? can i run any
> standalone application on it?
Define "any standalone application"!
As you have seen from your test (which failed) the answer is
obviously: No, you cannot.
> also vxworks bootloader can not run u-boot elf.why
> this happens?
Because U-boot is a boot loader and not a VxWorks image.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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