[okl4-developer] no debugging symbols with gdb

[Lukas HANEL]

Hi

Since I was able to compile OKL4 with my own platform, I am now trying
to start/boot OKL4. As I get no output on the serial line, despite
having adopted the driver and some memory mappings, I am starting to
debug.  Therefore in a first setup I use qemu with gdb. My problem is,
that gdb does not find the symbol table in the image.boot file. In the
kernel binary it finds the symbol table, but after the elfweaving, the
symbol table is not found by gdb.
Do you have any hints to solve this problem?

Apart from that I am able to do assembler based debugging with the
objdumped binary in a second window. But this is obviously much slower
and less convenient.

Thanks,
Lukas Hänel

Setup:

qemu

~$ /usr/bin/qemu-system-arm -kernel okl4_2.1/build/images/image.boot -M versatilepb -nographic -serial stdio -s -S


Codesourcery gdb

~/okl4_2.1$ arm-2005q3-2-arm-none-eabi-i686-pc-linux-gnu/bin/arm-none-eabi-gdb build/images/image.boot 

GNU gdb 6.3.50.20051020-cvs

Copyright 2004 Free Software Foundation, Inc.

GDB is free software, covered by the GNU General Public License, and you are

welcome to change it and/or distribute copies of it under certain conditions.

Type "show copying" to see the conditions.

There is absolutely no warranty for GDB.  Type "show warranty" for details.

This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-none-eabi"...

(no debugging symbols found)

(gdb) 


However, when using the kernel binary directly, I have interesting output:

~/okl4_2.1$ /mnt/nfs/arm/arm-2005q3-2-arm-none-eabi-i686-pc-gnu/bin/arm-none-eabi-gdb build/pistachio/bin/kernel -silent 

(gdb) info functions

All defined functions:

File pistachio/src/asid.cc:

static 

    void global constructors keyed to pistachio_src_asid.cc_BCB13488_55898A01(void);

File pistachio/src/assert.cc:

void __assert_failure(char const*);

File pistachio/src/cache.cc:

...

As you do not use any strip commands, objdump obviously shows the symbol
tables in both files.