On Mon, Nov 27, 2017 at 12:47:09AM +0000, Andre Przywara wrote:
In the moment our exception entry code needs 34 instructions, so we can't use put it directly into the table entry, which offers "only" 32 instructions there. Right now we just put an unconditional branch there, then use a macro to place the 34 instructions *per entry* after that. That effectivly doubles the size of our exception table, which is quite a waste, given that we use it mostly for debugging purposes.
Since the register saving part is actually identical, let's just convert that macro into a function, and "bl" into it directly from the exception slot, of course after having saved at least the original LR. This saves us about 950 bytes of code, which is quite a relief for some tight SPLs, in particular the 64-bit Allwinner ones.
Signed-off-by: Andre Przywara andre.przywara@arm.com
Applied to u-boot/master, thanks!