From owner-cvs-all  Mon Sep 18  7:55:32 2000
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Date: Tue, 19 Sep 2000 01:55:08 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Matthew Jacob <mjacob@feral.com>
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Subject: Re: cvs commit: src/sys/kern subr_bus.c
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On Mon, 18 Sep 2000, Matthew Jacob wrote:

> Yeah, I wondered about that too. I thought
> 
> int foo;
> 
> and
> 
> int foo=0;
> 
> were supposed to be the same. Is the kernel now forgetting to clear bss?

Same for the C abstract machine, which we mostly depend on in the
kernel (although the kernel is not entirely implementable in C).  Of
course, it is an implementation detail that the explicit initialization
puts the variable in the data section instead of in the bss, at least
for gcc on i386's.

The bss clearing code hasn't changed for years on  i386's.  I can't see
where the bss is cleared on alphas (alpha_init is called very early
in locore.s).

Bruce



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