From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: How to setup pre-allocated heap stack space?
Date: Tue, 5 Aug 2014 17:04:39 -0400 [thread overview]
Message-ID: <20140805210439.GM1674@brightrain.aerifal.cx> (raw)
In-Reply-To: <00ba01cfb0f0$21992d00$64cb8700$@codeaurora.org>
On Tue, Aug 05, 2014 at 01:59:21PM -0700, Weiming Zhao wrote:
> Hi Rich,
>
> I'm using it on a bare-metal setup. So the heap space some fixed address.
> So I think I should modify __brk() like:
> uintptr_t __brk(uintptr_t newbrk) {
> return newbrk == 0 ? HEAP_BASE : newbrk ; // assume heap is large enough
> }
> Is that correct? I don't need to worry about free(), right?
Well I would at least make sure you don't overflow into other memory,
by checking against an upper bound for the heap. But yes, something
like the above looks right.
Rich
next prev parent reply other threads:[~2014-08-05 21:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-05 20:26 Weiming Zhao
2014-08-05 20:47 ` Rich Felker
2014-08-05 20:59 ` Weiming Zhao
2014-08-05 21:04 ` Rich Felker [this message]
2014-08-05 21:07 ` Weiming Zhao
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