[U-Boot] [PATCH] arm: Allow u-boot to run from offset base address

Wolfgang Denk
2014-06-11T04:49:28Z

Dear Steve,

In message <53979199.5010100@broadcom.com> you wrote:
>
> OK - I think that one of the alternate proposals would be to
> conditionally reserve a "32 byte block" prior to the _start symbol (in
> "arch/arm/cpu/armv8/start.S") which would then be filled in by a
> post-processing step... This could be implemented by:

Yes, that illustrates the idea. However, this implementation suffers
from the use of an #ifdef where none is actually needed. Instead, you
can create your own source file which defines the header; this could
be then even in it's own segment, say:

your_header.c:

struct your_header {
u_int32[8];
} your_header __attribute__ ((__section__ (".your_hdr")));

All that is needed then is to make the linker place this segment in
front of the text segment.

This avoids an ugly #ifdef, and also modifications in the common code.

Best regards,

Wolfgang Denk

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