Re: Connect 2 mips simulator

["Frank Ch. Eigler" <fche@redhat.com>]

Hi -

On Fri, Sep 07, 2001 at 01:36:17PM +0200, Manganotto Filippo wrote:
: 	I'm working with Zampieri Marco. We have downloaded GDB from CVS
: and installed it. We find option --memory-mapfile FILE, but we doesn't
: know how to use it, because when we run
:     $>TARGET-run --memory-mapfile pippo.txt --memory-region=... hello
: [...]
: than we create an empty file called "pippo.txt", an the run
:     $>Error, cannot confirm that mmap file is large enough (>= 32768
: bytes)

A typical use of the mmap system call requires that the file being mapped
into memory be at least as large as the chosen mapped  memory size, so
that there is a one-to-one relationship between an existing byte in a
file, and a mapped byte in memory.  This means that an empty file, or
a too-small file will not be acceptable.

An easy way to create a file of a chosen size is to use the dd command
like this:

	dd if=/dev/zero of=pippo.txt bs=32768 count=1

This copies 1 block of 32768 bytes from /dev/zero to pippo.txt.
You will have a nice small zero-filled file.

- FChE
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From in000566@students.univr.it Fri Sep 07 05:07:00 2001
From: Manganotto Filippo <in000566@students.univr.it>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: "gdb@sources.redhat.com" <gdb@sources.redhat.com>
Subject: Re: Connect 2 mips simulator
Date: Fri, 07 Sep 2001 05:07:00 -0000
Message-id: <Pine.LNX.4.33.0109071359470.29146-100000@delta046.sci.univr.it>
References: <20010907074214.A20756@redhat.com>
X-SW-Source: 2001-09/msg00059.html
Content-length: 584

Hi,
	I create file pippo.txt with command that you tell me and then I
run simulator with parameters and the programma Hello World, but into file
it doesn't write nothing.

If I have understood just, into file I would have to find the simulator
memory into file, such as for example:

<memory location> : <memory value>

Is this right?

Thanks in advance

---------------------------------------------------------------
MANGANOTTO FILIPPO

       filippo.manganotto@students.univr.it
       manganot@arena.sci.univr.it
       pippomanga@tiscalinet.it
       filippo.manganotto@tin.it