Re: -current userland working for others?

[Matt Thomas <matt%3am-software.com@localhost>]

On Feb 6, 2011, at 9:53 AM, Jeff Rizzo wrote:

> Since the PPC changes brought in a couple weeks ago, I have not been able to 
> run a -current userland on my G4/400.
> 
> There was a problem where the kernel would not start, which was fixed by 
> matt@ after a few days, and I can successfully boot a GENERIC from the latest 
> autobuilds.  However, when I unpack userland (base.tgz, in this case), 
> basically all binaries except those in /rescue stop working.  I get these 
> kinds of messages from the kernel:
> 
> trap: pid 694.1 (ls): user read DSI trap @ 0x407eb46c by 0xeff0f2dc (DSISR 
> 0x40000000, err=14)
> trap: pid 541.1 (dmesg): user ISI trap @ 0x2000 (SRR1=0x4000f032)
> trap: pid 167.1 (dmesg): user ISI trap @ 0x2000 (SRR1=0x4000f032)
> 
> 
> ...once I back out to userland from 20110111, things start working again.
> 
> Does anyone have any clue what's going on here?  This is the box that I was 
> using to run ATF tests on, and it's basically been idle for three weeks 
> because of this.

The latest commit to powerpc/include/asm.h fixes this.  I didn't realize
that after my changes that binutils/gcc automatically switched to using
secure-plt by default.  The change to asm.h make .S files use secureplt
as well.

One side effect of this is that PPC programs will no longer have 
executable .data/.bss and startup times will be slightly faster.