asm debug problem

[Yi Tang]

Hi Andrew

>From your reply, it seems that the compiler doesn't support the DWARF 
debuginfo and uses the stab debuginfo instead. That cause the gdb to behave 
strangely for assemble source code.

I might need to ask the platform provider about this thing.

Thank for your help.
Regards,
Tony
----- Original Message ----- 
From: "Andrew Haley" <aph-gcc@littlepinkcloud.COM>
To: "Yi Tang" <yitang@itee.uq.edu.au>
Cc: "GCC-HELP" <gcc-help@gcc.gnu.org>
Sent: Sunday, November 11, 2007 8:32 PM
Subject: Re: asm debug problem


> Yi Tang writes:
> > Results for objdump -W <file>.o
> >
> > uivsr.o:          file format elf32-big
> > astest1.o       file format elf32-big
> >
> > Thanks
> > Tony
>
> This top-posting is very confusing.
>
> OK, so there is no DWARF debuginfo in either file.
>
> You can single-step even without debuginfo.
>
> Do:
>
> disp/i $pc
>
> then
>
> si
>
>
>
>
>
> > ----- Original Message ----- 
> > From: "Andrew Haley" <aph-gcc@littlepinkcloud.COM>
> > To: "Yi Tang" <yitang@itee.uq.edu.au>
> > Cc: "GCC-HELP" <gcc-help@gcc.gnu.org>
> > Sent: Saturday, November 10, 2007 9:52 PM
> > Subject: Re: asm debug problem
> >
> >
> > > Yi Tang writes:
> > >
> > > > Sorry for not clarifying the problem clearly. Both the rtos and the
> > > > application are compiled using gcc.
> > > >
> > > > The rtos and application code seems work ok. The only problem is 
> > > > that I
> > > > can't debug the assembly written HAL part of the rtos.
> > > >
> > > > I don't know whether my platform support DWARF debuginfo or not. How 
> > > > can
> > > > I
> > > > find out? The toolchain I use is a bare c sparc-elf toolchain.
> > > > http://www.gaisler.com/cms/index.php?option=com_content&task=view&id=147&Itemid=31
> > > >
> > > > Following is the command I use for compile, assemble and link:
> > > >
> > > > Thanks for your reply.
> > > > Regards,
> > > > Tony
> > >
> > > What does
> > >
> > > objdump -W uivsr.o
> > >
> > > do?
> > >
> > > >
> > > > sparc-elf-gcc -c -o
> > > > astest1.o -I/ecos/osek/dtimer2_install/include -msoft-float -O2 -g -Wall
> > > >  -Q
> > > > -msoft-float -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef
> > > > -Woverloaded-virtual
> > > >  -g -O2 -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc
> > > >  -finit-priority astest1.c
> > > >
> > > > sparc-elf-gcc -c -o
> > > > uivsr.o -I/ecos/osek/dtimer2_install/include -msoft-float -O2 -g -Wall -Q
> > > > -msoft-float
> > > >  -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef -Woverloaded-virtual
> > > >  -g -O2 -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc
> > > >  -finit-priority uivsr.S
> > > >
> > > > sparc-elf-gcc -L/ecos/osek/dtimer2_install/lib -Ttarget.ld -nostdlib -g -Wl,--gc-sections
> > > >  -Wl,-static -Q -msoft-float -g -nostdlib -fvtable-gc -Wl,--gc-sections
> > > > -Wl,-static
> > > >  -o astest1 astest1.o uivsr.o
> > > >
> > > > ----- Original Message ----- 
> > > > From: "Andrew Haley" <aph-gcc@littlepinkcloud.COM>
> > > > To: "Yi Tang" <yitang@itee.uq.edu.au>
> > > > Cc: "GCC-HELP" <gcc-help@gcc.gnu.org>
> > > > Sent: Friday, November 09, 2007 7:16 PM
> > > > Subject: Re: asm debug problem
> > > >
> > > >
> > > > > Yi Tang writes:
> > > > > > Hello maintainter,
> > > > > >
> > > > > > I have got some trouble using gdb for my assemble source code. 
> > > > > > It
> > > > > > seems
> > > > > > like
> > > > > > some gcc link problem.
> > > > > >
> > > > > > My code, written in asm and compiled by gcc, should be attached 
> > > > > > to
> > > > > > an
> > > > > > rtos
> > > > > > library (ecos) to perform some test.  However, I found it is not
> > > > > > possible to
> > > > > > debug the assemble source code under gdb. My assemble code, to 
> > > > > > build
> > > > > > the
> > > > > > function (usr_interrupt_vsr()), is in a separate file called
> > > > > > uivsr.S.
> > > > > > And it
> > > > > > is linked to the OS through a head file. However, when I run the
> > > > > > gdb, it
> > > > > > goes to some other file in OS kernel, the clock.cxx (also wrong 
> > > > > > line
> > > > > > num,
> > > > > > I'm pretty sure no such function in this file). And the language 
> > > > > > is
> > > > > > set
> > > > > > to
> > > > > > C++. I also tried gas as assembler, same situation.
> > > > > >
> > > > > > Following is the snapshot, hope you guys can give me some hints.
> > > > >
> > > > > You haven't really given us enough information.
> > > > >
> > > > > Firstly, does debugging usually work on your platform?
> > > > >
> > > > > Does your platform use DWARF debuginfo?  What does
> > > > >
> > > > > objdump -W <file>.o
> > > > >
> > > > > do?
> > > > >
> > > > > What *exactly* was the command you used to assumble your file?
> > > > >
> > > > > Andrew.
> > > > >
> > > >
> > > >
> > >
> >
> >
>