> i had to make the following changes to the kernel for xen3 to match up
> to recent labs pc kernel and to compile successfully. can anyone
> verify the changes are correct? (i could to a smoke test on EC2, but
> don't feel adventurous at the moment)
The evenaddr function in trap.c should be replaced by validalign:
void
validalign(uintptr addr, unsigned align)
{
/*
* Plan 9 is a 32-bit O/S, and the hardware it runs on
* does not usually have instructions which move 64-bit
* quantities directly, synthesizing the operations
* with 32-bit move instructions. Therefore, the compiler
* (and hardware) usually only enforce 32-bit alignment,
* if at all.
*
* Take this out if the architecture warrants it.
*/
if(align == sizeof(vlong))
align = sizeof(long);
/*
* Check align is a power of 2, then addr alignment.
*/
if((align != 0 && !(align & (align-1))) && !(addr & (align-1)))
return;
postnote(up, 1, "sys: odd address", NDebug);
error(Ebadarg);
/*NOTREACHED*/
}
This is a change done by Jim McKie on 2014-05-15.
--
David du Colombier
