[parisc-linux] Panic on boot in 64 bit 2.6.6-rc1-pa0

[John David Anglin]

> On Fri, 2004-04-23 at 13:50, John David Anglin wrote:
> > Yes, that's what gcc generates for PA 2.0.
> > 
> > Regarding the assembler, I'm wondering if we want the keep "bl" for
> > generating 17-bit branches.  It's rather confusing and inconsistent
> > with the mnemonic mapping given in the 2.0 manual.  On the otherhand,
> > gas has been this way for 4-5 years.
> 
> Yes, I think our current pressing problem is to discover why hppa64-ld
> is generating out of range PCREL17F branches instead of stubbing them. 
> That's definitely what's causing the boot failure in 2.6.6-rc1-pa0.
> 
> It's so strange.  Since the init section is quite a way away, it should
> already be stubbing jumps to the init section.  I can't work out why the
> addition of yet another section (this time covering scheduler functions)
> suddenly causes it to fail.

I think I know why.  The 64-bit linker only supports a single stub
table.  Things go bad when a branch can't reach its stub.  I hit this
when I was trying to implement tail calls.

Dave
-- 
J. David Anglin                                  dave.anglin at nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)