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From: Frank Kotler <fbkotler@verizon.net>
To: Kircsi Tibor <tkircsi@gmail.com>
Cc: linux-assembly@vger.kernel.org
Subject: Re: Current break round up
Date: Wed, 01 Oct 2008 09:43:47 -0400	[thread overview]
Message-ID: <48E37E93.3080101@verizon.net> (raw)
In-Reply-To: <1222802784.8421.10.camel@kirilla-desktop>

Kircsi Tibor wrote:
> Hi,
> 
> Sorry for my english. I started learn assembly again after 15 years.
> Now, I'm learning about memory management and sys_brk system call. I've
> created a really simple program, which try to extend the heap size. I've
> read, when sys_brk is called with the new break address(last usable
> address of the heap or data segment), it will be rounded up to the next
> nearest page, but it didn't. Am I misundestand somthing?

I've noticed this. Seems to be related to kernel version (2.4.33.3 
here). May be a "bug"? I think you can access memory up to the top of 
the page (what you/we would "expect" brk to return). I don't know what 
to make of it.

Best,
Frank


  reply	other threads:[~2008-10-01 13:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-30 19:26 Current break round up Kircsi Tibor
2008-10-01 13:43 ` Frank Kotler [this message]
2008-10-01 14:40   ` Tibor Kircsi
     [not found]   ` <61990392562924881677723846250054653396-Webmail2@me.com>
2008-10-01 18:22     ` Frank Kotler
2008-10-01 19:03       ` Kircsi Tibor
2008-10-01 20:27         ` Frank Kotler
2008-10-02  7:27           ` Tibor Kircsi

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