From: fpga <mgbg25171@blueyonder.co.uk>
To: gdb@sourceware.org
Subject: Re: stepping through a flat binary in qemu
Date: Sat, 17 Oct 2009 16:11:00 -0000 [thread overview]
Message-ID: <25938062.post@talk.nabble.com> (raw)
In-Reply-To: <25936753.post@talk.nabble.com>
fpga wrote:
>
> Hi.
> I'm trying to step through a tiny real-to-pmode os in qemu using gdb.
>
> I'm using
> nasm -f bin emakeimg.asm -o enth.fbin
> to assemble the thing and then pasting the 16bit flat binary to a floppy
> image
> i.e. no debugging symbols.
>
> I've booted the os in qemu with
> "qemu -s -S -fda boot.img -boot a"
> & also without "-s" (use gstabs)
>
> In another terminal I debug the same image and connect to qemu via
> "target remote localhost:1234".
> If I type "cont" the OS starts to execute.
>
> If I try to step by typing "break" gdb complains about no symbols.
> Is it possible to step through this 16 bit bootloader code and into the OS
> proper with no symbols & if not what's the easiest way of putting symbols
> in.
>
> I have a problem that if I try to assemble as elf, I have multiple [ORG
> statements in the code] which only bin files recognise.
>
> Any help much appreciated.
>
>
Its ok I've sorted it using this thread
http://qemu-forum.ipi.fi/viewtopic.php?f=22&t=4544
Thanks very much dhbaird!
If there's any more useful advice re this I'd appreciate it
--
View this message in context: http://www.nabble.com/stepping-through-a-flat-binary-in-qemu-tp25936753p25938062.html
Sent from the Sourceware - gdb list mailing list archive at Nabble.com.
next prev parent reply other threads:[~2009-10-17 12:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-17 12:55 fpga
2009-10-17 16:11 ` fpga [this message]
2009-10-17 23:03 ` Michael Snyder
2009-10-18 16:18 ` fpga
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