On Thu, 2008-11-20 at 10:37 -0500, Josh Boyer wrote:
> On Thu, 20 Nov 2008 16:09:16 +0100
> "Joakim Tjernlund" <[EMAIL PROTECTED]> wrote:
>
> > Why does the below program end up reporting -1
> > multiple seconds when times() wrap:
>
> http://sources.redhat.com/bugzilla/show_bug.cgi?id=5209
>
> josh
I see, but this is a new ppc kernel bug I think.
This little hack changes the kernel sys call handling in an crude
way and then it works. Apperently the kernel thinks is an error if the
syscall returns a value between -_LAST_ERRNO and -1.
Perhaps a known bug?
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 1cbbf70..72effde 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -278,7 +278,8 @@ ret_from_syscall:
SYNC
MTMSRD(r10)
lwz r9,TI_FLAGS(r12)
- li r8,-_LAST_ERRNO
+ //li r8,-_LAST_ERRNO
+ li r8,-2
andi.
r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
bne- syscall_exit_work
cmplw 0,r3,r8
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