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Re: ARM: Imply frame pointer for arm-linux profiling


On Wed, 2005-05-11 at 15:47, Daniel Jacobowitz wrote:

> That is a devilish trick.  Of course to work on earlier cores it would
> need the appropriate relocation for bx ip -> mov pc, ip; ISTR that the
> GNU tools don't implement that yet.
> 
> It won't be right away, but I will look into implementing this for
> arm-eabi and arm-none-linux-gnueabi.

There's another devilish trick for that too...

	tst	ip, #1
	moveq	pc, ip
	bx	ip

:-)

Which works on any core that has a 32-bit program counter (for real
legacy 26-bit PCs it works in user mode too, since the bottom two bits
were 00).

R.


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