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Date: Fri, 29 Jun 2001 12:16:03 -0700 (PDT)
From: Mikko Tyolajarvi <mikko@dynas.se>
Message-Id: <200106291916.f5TJG3O14126@explorer.rsa.com>
To: roman@harmonic.co.il
Cc: stable@freebsd.org
Subject: Re: Unable to run linux unace
Newsgroups: local.freebsd.stable
References: <993766542.3b3bac8e564d4@webmail.harmonic.co.il> <993772061.3b3bc21db3df0@webmail.harmonic.co.il>
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In local.freebsd.stable you write:

>Quoting Roman Shterenzon <roman@harmonic.co.il>:

>> Hello,
>> I wanted to use linux unace from www.winace.com
>> (http://praf.nirvanet.net/winace/linunace203.tgz),
>> but unfortunately it doesn't work.
>> When I used truss on it, I've seen this:

[...]

>> linux_mremap(0x28109000,0x61000,0x81000,0x1)     ERR#12 'Cannot allocate
>> memory'

[...]

>This is what I get when I run it on remote linux system:

>mremap(0x40000000, 135168, 266240, MREMAP_MAYMOVE) = 0x40000000

[...]

>It doesn't give me any hints :(

From a Linux mremap() man page:

 void *mremap(void *old_address, size_t old_size, size_t new_size,
	      unsigned long flags);

And from linux_mremap() in the linuxulator (linux_misc.c):

        if (args->new_len > args->old_len) {
                p->p_retval[0] = 0;
                return ENOMEM;
        }

To me it looks like extending a mmapped region with mremap() isn't supported.

  $.02,
  /Mikko
-- 
 Mikko Työläjärvi_______________________________________mikko@rsasecurity.com
 RSA Security

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