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[Gcl-devel] Re: gcl/maxima on hppa


From: Matthew Wilcox
Subject: [Gcl-devel] Re: gcl/maxima on hppa
Date: Wed, 31 Jul 2002 23:50:20 +0100
User-agent: Mutt/1.2.5.1i

On Wed, Jul 31, 2002 at 06:42:47PM -0400, Camm Maguire wrote:
> Looking over the boehm-gc code, the only unusual item appears to be a
> requirement to align malloc results on 8 byte boundaries even when
> running in 32bit mode.  

surely 16 byte boundaries?  some structs are allocated on the stack,
which we need to do atomic ops on.  and we can't guarantee atomic ops
work unless they're 16-byte aligned.

> 2) Is there anything unusual about the C stack on hppa?

it grows upwards instead of downwards?

> 3) When looking at the situation in a debugger, certain local
>    variables on the stack cannot report their address, apparently
>    indicating they are stored in registers.  Is there a way to flush
>    these reliably to memory before collecting garbage?

umm.  no idea.

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