Tom St Denis <tstdenis@xxxxxxxxxxxxxxxx> writes: > I need to get GCC to align all auto variables on an 8 byte boundary. > Which internally seems to be happening, but the stack frame is never > 8-byte aligned (it is 4-byte aligned). The problem is that on the > xscale [e.g. PXA255] 64-bit loads are done in one memory reference which > means that ifyou try to load a 64-bit variable that isn't 8-byte aligned > you get a memory trap. > > Is there a GCC switch or a patch I could use to ensure the stack frames > are aligned properly? If the stack pointer starts at an 8-byte boundary, gcc for XScale should preserve that. So you need to arrange for your startup file to set an 8-byte boundary. gcc doesn't have any way to do that itself. Ian
