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remote debugging with gdb
- From: Martin Schuchardt <kruemeltee at gmx dot de>
- To: gdb at sourceware dot org
- Date: Wed, 10 May 2006 19:07:46 +0200
- Subject: remote debugging with gdb
Hello to all,
I have a little "big" problem with remote debugging with gdb. I have the
following situation: I'm implementing an own operating system with the
help of c++ and assembler (practice at the University). We're building
the whole system starting with an output on the Screen.
If we compile the complete system we use make. We've got a Makefile and
Linker-Skripts. After using "make bootdisk.img" we get a file, named
bootdisk.img (this one has to be a floppy Image which we could use with
bochs to emulate our self-written OS). But there are some other files
too, "system" and "system.img". The First one (system) could be the one
to debug with gdb. The other one's purpose is completely unknown.
Okay ... now to bochs. I've recompiled bochs with "$ ./configure
--enable-gdb-stub". I've rearranged the position of bss_base, data_base
and text_base at the linker skript. Now I added the line
"gdbstub: enabled=1, port=1234, text_base=0x10000, data_base=0x20000,
bss_base=0x30000" at the bochsrc.txt (the currently used Config file of
bochs).
now I could start bochs and it stops with the line "waiting for gdb to
connect". So I startet gdb with the file "system". Everything works
fine. Now I have to connect gdb with bochs. That's why I'm typing
"target remote localhost:1234" at the gdb command line.
Now I get the following error message:
(gdb) target remote localhost:1234
Remote debugging using localhost:1234
0x0000fff0 in ?? ()
Reply contains invalid hex digit 78
Does anybody know, why I get this reply? Bochs is still waiting for
connection on localhost:1234. The complete Programm works fine without
the debugger. (when I disable the debugger, bochs works fine and seems
to work corrently.
mfg maddin