[U-Boot-Users] u-boot.lds questions

[U-Boot-Users] u-boot.lds questions

[Peter Asemann]

I've "successfully" built my u-boot port (it doesn't throw warnings/error).

To do so I just copied some u-boot.lds from some other port.
I know that the u-boot.lds is a linker script that instructs the linker 
to put code elements together in some specific way. At least the first 
part does so. But the lower parts of the u-boot.lds I copied seem to be 
increasingly deep magic. So... what does the u-boot.lds do exactly and 
what happens if mine is wrong/broken? And why do I need it anyway?

The built put out the following things in the main directory:

-rwxr-x---          1234997 Jan 19 12:51 u-boot
-rwxr-x---           171372 Jan 19 12:51 u-boot.bin
-rw-r-----            94836 Jan 19 12:51 u-boot.map
-rwxr-x---           514202 Jan 19 12:51 u-boot.srec

there are some parts that probably are important in board/esm (my 
board's directory) too:

-rw-r-----            17000 Jan 17 16:05 esm.o
-rw-r-----            17176 Jan 17 16:05 libesm.a

Does that look reasonable/good?

Peter Asemann

[U-Boot-Users] u-boot.lds questions

[Wolfgang Denk]

In message <41EE4C83.9020604@web.de> you wrote:
> 
> To do so I just copied some u-boot.lds from some other port.
> I know that the u-boot.lds is a linker script that instructs the linker 
> to put code elements together in some specific way. At least the first 
> part does so. But the lower parts of the u-boot.lds I copied seem to be 
> increasingly deep magic. So... what does the u-boot.lds do exactly and 

I can't put it any better: It is a linker script that  instructs  the
linker to put code elements together in some specific way.

> what happens if mine is wrong/broken? And why do I need it anyway?

Your code will not run and/or crash.

You need it to get a working image.

> Does that look reasonable/good?

This is impossible to say from this information. u-boot.map might  be
interesting to check - for you; please don't post it here, though.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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