Date: Wed, 15 Jun 2011 16:00:55 +0200 From: Vlad Galu <dudu@dudu.ro> To: Joerg Wunsch <joerg@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: doscmd under 8-stable, anyone? Message-ID: <BANLkTikt-zoHLqKEc5a1OAHau7-LESHjwg@mail.gmail.com> In-Reply-To: <20110615135704.GQ23206@uriah.heep.sax.de> References: <20110615135704.GQ23206@uriah.heep.sax.de>
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Hi Joerg,
Flip security.bsd**.map_at_zero to 1.
On Wed, Jun 15, 2011 at 3:57 PM, Joerg Wunsch <
freebsd-stable@uriah.heep.sax.de> wrote:
> When trying to use doscmd on 8-stable, all I get is:
>
> Error mapping HMA, HMA disabled: : Invalid argument
> Segmentation fault (core dumped)
>
> The segfault happens at the end of mem_init(), when the allocated DOS
> memory (which is located at virtual address 0) is attempted to be
> written to. Apparently, the mmap() failure that causes the "HMA
> disabled" message is actually a fatal error rather than a benign one
> the could be ignored, as it results in no valid DOS memory allocation
> at all.
>
> Right now, the only older system I could test it against uses FreeBSD
> 5.x, where the mmap() works as expected. So does anyone have an idea
> why this mmap() call:
>
> if (mmap((caddr_t)0x000000, 0x100000,
> PROT_EXEC | PROT_READ | PROT_WRITE,
> MAP_ANON | MAP_FIXED | MAP_SHARED,
> -1, 0) == MAP_FAILED) {
> perror("Error mapping HMA, HMA disabled: ");
> HMA_a20 = -1;
> close(HMA_fd_off);
> close(HMA_fd_on);
> return;
> }
>
> yields an EINVAL now under 8-stable?
>
> --
> cheers, J"org .-.-. --... ...-- -.. . DL8DTL
>
> http://www.sax.de/~joerg/ NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
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--
Good, fast & cheap. Pick any two.
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