This is the mail archive of the
gdb@sourceware.org
mailing list for the GDB project.
stepping through a flat binary in qemu
- From: fpga <mgbg25171 at blueyonder dot co dot uk>
- To: gdb at sourceware dot org
- Date: Sat, 17 Oct 2009 02:38:59 -0700 (PDT)
- Subject: stepping through a flat binary in qemu
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.
--
View this message in context: http://www.nabble.com/stepping-through-a-flat-binary-in-qemu-tp25936753p25936753.html
Sent from the Sourceware - gdb list mailing list archive at Nabble.com.