[PATCH] arm: kprobes-test: Fix compile error "bad immediate value for offset"

Russell King - ARM Linux linux at arm.linux.org.uk
Fri Sep 26 08:19:48 PDT 2014


On Fri, Sep 26, 2014 at 04:04:24PM +0100, Jon Medhurst (Tixy) wrote:
> When compiling kprobes-test-arm.c the following error has been observed
> 
> /tmp/ccoT403o.s:21439: Error: bad immediate value for offset (4168)
> 
> This is caused by the compiler spilling it's literal pool too far away
> from the site which is trying to reference it with a PC relative load.
> This arises because the compiler is underestimating the size of the
> inline assembler code present, which apparently it approximates as 4
> bytes per line or instruction.
> 
> We fix this problem by moving the operations which generate more than
> 4 bytes out of the text section. Specifically, moving the .ascii
> directives to the .rodata section.
> 
> Signed-off-by: Jon Medhurst <tixy at linaro.org>
> ---
> 
> Russell, OK to add your 'reported-by' here (or should it be Olof)?

I suspect it should be Olof - I'm just the middle man, spotting errors
in Olof's build results... though it did help that it was my for-next
branch which was being built.

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