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Date: Sun, 6 Aug 2006 03:11:56 -0400 From: Chuck Ebbert <76306.1226@...puserve.com> To: Andi Kleen <ak@...e.de> Cc: linux-kernel <linux-kernel@...r.kernel.org>, Jan Beulich <jbeulich@...ell.com>, Dave Jones <davej@...hat.com>, Jesper Juhl <jesper.juhl@...il.com>, Andrew Morton <akpm@...l.org> Subject: Re: [patch] i386: fix one case of stuck dwarf2 unwinder II In-Reply-To: <200608060805.06821.ak@...e.de> On Sun, 6 Aug 2006 08:05:06 +0200, Andi Kleen wrote: > Hmm, actually I applied it but then I had doubts it actually > works -- I think you don't need _stext but the code before > the first call in head. Since head.S doesn't do a call > that's probably start_kernel But head.S does do a call (on i386 but not x86_64 AFAICT): | #ifdef CONFIG_SMP | movb ready, %cl | movb $1, ready | cmpb $0,%cl | je 1f # the first CPU calls start_kernel | # all other CPUs call initialize_secondary | call initialize_secondary | jmp L6 | 1: | #endif /* CONFIG_SMP */ | call start_kernel | L6: | jmp L6 # main should never return here, but | # just in case, we know what happens. And the backtraces I saw ended up at L6: | DWARF2 unwinder stuck at 0xc0100210 System.map on i386 SMP says: | c0100210 t L6 -- Chuck - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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