On Wed, Mar 29, 2006 at 10:51:14AM -0600, Russ Anderson wrote: > Jes Sorensen wrote: > > > > Hi, > > > > I've been chasing a very strange but since Monday and I am starting > > to hit a brick wall. > > > > Basically I am unable to build a kernel from Linus' git tree on one > > system since Monday morning, whereas it boots fine if I build it on an > > older system. I tried installing an older toolchain on this box but it > > still didn't seem to make a difference. The system boots, calls init and > > I most often get the message "INIT: 2.85 booting", then a hang. In some > > instances I don't even get the INIT message. Have you NMI'ed the system to see where it is hanging. Also, give it a spin on the simulator. These kinds of bugs are frequently easier to debug on the simulator. If you want, send me a pointer to a kernel & I see what happens. > > It builds and boots on all the machines I have tried, > including the same build and boot machines Jes uses. > Jes can't get it to work, I can't get it to fail. > > > What sparked it was Russ Anderson's patch which added a few lines to > > include/asm-ia64/asmmacros.h, git id > > d2a28ad9fa7bf16761d070d8a3338375e1574b32 > > > > I've tracked it down to being the two lines doing a .section/.previous > > in the below patch chunk causing it. However it doesn't seem to be the > > specific .section name that does it, ie. any random .section/.previous > > pair I add to arch/ia64/kernel/gate.S has the same effect. > > > > Now I am not a wiz in linker/gas magic, so I was hoping someone else > > had an idea what could be causing this? Anyone seen anything similar? > > > > The specific toolchain I am using is gcc-4.1.0 based, but I tried > > 3.3.4 (with binutils 2.15) and it failed as well. However 4.0.2 on > > another system seems to do fine (admittedly it had binutils 2.14.90.x). > > > > Any suggestions would be greatly appreciated. > > > > Thanks, > > Jes > > > > > > > > diff --git a/include/asm-ia64/asmmacro.h b/include/asm-ia64/asmmacro.h > > index 77af457..d4cec32 100644 > > --- a/include/asm-ia64/asmmacro.h > > +++ b/include/asm-ia64/asmmacro.h > > @@ -51,6 +51,17 @@ name: > > [99:] x > > > > /* > > + * Tag MCA recoverable instruction ranges. > > + */ > > + > > + .section "__mca_table", "a" // declare section & > > section attributes > > + .previous > > + > > +# define MCA_RECOVER_RANGE(y) \ > > + .xdata4 "__mca_table", y-., 99f-.; \ > > + [99:] > > + > > +/* > > * Mark instructions that need a load of a virtual address patched to be > > * a load of a physical address. We use this either in critical > > performance > > * path (ivt.S - TLB miss processing) or in places where it might not be > > > > > -- > Russ Anderson, OS RAS/Partitioning Project Lead > SGI - Silicon Graphics Inc rja@xxxxxxx > - > : send the line "unsubscribe linux-ia64" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Thanks Jack Steiner (steiner@xxxxxxx) 651-683-5302 Principal Engineer SGI - Silicon Graphics, Inc. - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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