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From: Peter Lieven <pl@kamp.de>
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Date: Mon, 4 Jul 2016 12:35:41 +0200
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Subject: Re: [Qemu-devel] [PATCH 1/6] oslib-posix: add helpers for stack
 alloc and free
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To: Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <rth@twiddle.net>, qemu-devel@nongnu.org
Cc: kwolf@redhat.com, peter.maydell@linaro.org, mst@redhat.com, dgilbert@redhat.com, mreitz@redhat.com

Am 04.07.2016 um 12:34 schrieb Paolo Bonzini:
>
> On 04/07/2016 12:25, Peter Lieven wrote:
>>> No, you just pass the stack and the runtime takes care of initializing
>>> the two stack pointers:
>>>
>>>       uc.uc_link = &old_uc;
>>>       uc.uc_stack.ss_sp = co->stack;
>>>       uc.uc_stack.ss_size = stack_size;
>>>       uc.uc_stack.ss_flags = 0;
>> So, you would basically copy the if/elif part from allocatestack.c ?
> Yes, but note that _STACK_GROWS_{DOWN,UP} and
> NEED_SEPARATE_REGISTER_STACK are glibc-specific.  You need to use
> HOST_IA64 and HOST_HPPA.

Is HOST_HPPA the only supported target where the stack grows up?

Peter