From: Per Jessen <per@computer.org>
To: linux-c-programming@vger.kernel.org
Subject: Re: Function stack reallocation
Date: Wed, 28 Mar 2007 13:31:20 +0200 [thread overview]
Message-ID: <460A5208.7070501@computer.org> (raw)
In-Reply-To: <460A177A.4080506@um.edu.mt>
Reggie Cushing wrote:
> Hi All - I wish some insight on the possibility of reallocating a
> function stack to a malloced regions in realtime ie I jump out of a
> function and the next time I jump in the stack would have moved along
> with its data. To me it seems unreliable cause the values in the stack
> have no type hence I would not know if the stack value is a data value
> or a pointer. If I mistakenly interpret a data value as a pointer I will
> update the data value resulting in data corruption. I would really wish
> some expert insight in this on this subject.
What you're talking about is something long these lines:
a=malloc(chunk);
memcpy( chunk, SP, size);
SP=chunk;
The only way you "know" what's on your stack is by the variable
declarations you've made in your code. The stack, wherever it is, does
not contain any type info.
/Per Jessen, Zurich
next prev parent reply other threads:[~2007-03-28 11:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-28 7:21 Function stack reallocation Reggie Cushing
2007-03-28 11:31 ` Per Jessen [this message]
2007-03-28 13:36 ` Reggie Cushing
2007-03-28 11:36 ` Neil Horman
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