Date: Fri, 22 Sep 2000 01:46:58 +0200 From: Bernd Walter <ticso@cicely5.cicely.de> To: John Baldwin <jhb@FreeBSD.ORG> Cc: alpha@FreeBSD.ORG Subject: Re: Ithreads kernel weirdness Message-ID: <20000922014657.B58579@cicely5.cicely.de> In-Reply-To: <20000922012311.A58579@cicely5.cicely.de>; from ticso on Fri, Sep 22, 2000 at 01:23:11AM %2B0200 References: <XFMail.000919233108.jhb@FreeBSD.org> <20000922012311.A58579@cicely5.cicely.de>
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On Fri, Sep 22, 2000 at 01:23:11AM +0200, Bernd Walter wrote:
> Pressing the halt key on the hanging system showed me that
> it is always in hardclock()
To be exact PC is fffffc0000376dac which means that call_pal isn't returning.
I repeated it several times and it's always the same address independent
where the kernel hang.
For reference from kern/kern_clock.c:
if (CLKF_BASEPRI(frame)) {
fffffc0000376d98: f0 00 2b a4 ldq t0,240(s2)
fffffc0000376d9c: 01 f0 20 44 and t0,0x7,t0
fffffc0000376da0: 07 00 20 f4 bne t0,fffffc0000376dc0 <hardclock+0x160>
static __inline u_int64_t
alpha_pal_swpipl(u_int64_t newipl)
{
register u_int64_t a0 __asm__("$16") = newipl;
fffffc0000376da4: 01 00 1f 22 lda a0,1(zero)
register u_int64_t v0 __asm__("$0");
__asm__ __volatile__ (
fffffc0000376da8: 35 00 00 00 call_pal 0x35
/*
* Save the overhead of a software interrupt;
* it will happen as soon as we return, so do it now.
*/
(void)splsoftclock();
softclock();
fffffc0000376dac: 30 cc 7d a7 ldq t12,-13264(gp)
fffffc0000376db0: c3 56 5b 6b jsr ra,(t12),fffffc000037c8c0 <knote+0x60>
fffffc0000376db4: 22 00 ba 27 ldah gp,34(ra)
fffffc0000376db8: cc 3f bd 23 lda gp,16332(gp)
} else
fffffc0000376dbc: 11 00 e0 c3 br fffffc0000376e04 <hardclock+0x1a4>
setsoftclock();
fffffc0000376dc0: 80 8d 7d a7 ldq t12,-29312(gp)
fffffc0000376dc4: 1e 6b 5b 6b jsr ra,(t12),fffffc0000371a40 <pnp_parse_resources+0xc60>
fffffc0000376dc8: 22 00 ba 27 ldah gp,34(ra)
fffffc0000376dcc: b8 3f bd 23 lda gp,16312(gp)
} else if (softticks + 1 == ticks)
--
B.Walter COSMO-Project http://www.cosmo-project.de
ticso@cicely.de Usergroup info@cosmo-project.de
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