_sbrk: undefined reference to `end' problem
Jonathan S. Shapiro
Tue Jun 3 08:31:00 GMT 2008
Interesting. We chose to do this with a weak symbol from a
platform-specific runtime library, in order to allow the application to
override the selection. Same idea, and the linker script could probably
export a weak symbol if desired.
On Wed, 2008-05-28 at 09:01 +0100, Nick Clifton wrote:
> Hi Jonathan,
> >> Note: putting the "PROVIDE (end = .);" at the end of your linker script
> >> is incorrect because presumably you have also provided the location of
> >> the start of the stack...
> > It is not clear (to me) why start of stack should be encoded within the
> > ELF file.
> It isn't. It is encoded within the linker script used to link together
> the object files that make up the executable. Since the linker script
> knows the layout of memory on the target board/simulator, it makes sense
> that the linker script should be responsible for the placement of the
> start of the stack.
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