Re: single-step

Re: single-step

[Richard Earnshaw]

> Hi !
> 
> I have and ARM dev board hooked to a Jeeni, controlled via ethernet. It
> doesn't singl-step, it only stops at breakpoints. When I issue a "info
> target", gdb replies that "Target can't single-step".
> However I would greatly appreciate it to single step to debug my apps ...
> So do you know how to fix it ? Is it a hardware non-feature or a simple
> software misconfiguration ? Can gdb emulate singlestepping transparently
> using breakpoints ?
> 
>     Xav
> 
> 

You need to make sure SOFTWARE_SINGLE_STEP_P is not defined to zero before 
including tm-arm.h

Richard.

Re: single-step

[Xavier Bestel]

> > I have and ARM dev board hooked to a Jeeni, controlled via ethernet. It
> > doesn't singl-step, it only stops at breakpoints. When I issue a "info
> > target", gdb replies that "Target can't single-step".
> > However I would greatly appreciate it to single step to debug my apps
...
> > So do you know how to fix it ? Is it a hardware non-feature or a simple
> > software misconfiguration ? Can gdb emulate singlestepping transparently
> > using breakpoints ?
> >
> >     Xav
> >
> >
>
> You need to make sure SOFTWARE_SINGLE_STEP_P is not defined to zero before
> including tm-arm.h
>
> Richard.
>

ok, so if I understood the system, when SOFTWARE_SINGLE_STEP_P=1,
SOFTWARE_SINGLE_STEP is the function which emulates the singlestepping using
breakpoints.
but if I don't define SOFTWARE_SINGLE_STEP_P, or if I define it to 1, then
do I have to provide a specialized SOFTWARE_SINGLE_STEP_P() ? There is no
such thing in tm-arm.h.

    Xav

Re: single-step

[Richard Earnshaw]

> ok, so if I understood the system, when SOFTWARE_SINGLE_STEP_P=1,
> SOFTWARE_SINGLE_STEP is the function which emulates the singlestepping using
> breakpoints.
> but if I don't define SOFTWARE_SINGLE_STEP_P, or if I define it to 1, then
> do I have to provide a specialized SOFTWARE_SINGLE_STEP_P() ? There is no
> such thing in tm-arm.h.

Arggh!  Sorry, I've mislead you.  I've got some local patches in my tree 
for doing that and I'd forgotten that I hadn't submitted them yet.  I'm 
sure this code used to be there, but for some reason it has been deleted.

It appears that at this time, you can't single step if there is no 
hardware or OS support for the feature.

Richard.

Re: single-step

[Richard Earnshaw]

> Hi !
> 
> I have and ARM dev board hooked to a Jeeni, controlled via ethernet. It
> doesn't singl-step, it only stops at breakpoints. When I issue a "info
> target", gdb replies that "Target can't single-step".
> However I would greatly appreciate it to single step to debug my apps ...
> So do you know how to fix it ? Is it a hardware non-feature or a simple
> software misconfiguration ? Can gdb emulate singlestepping transparently
> using breakpoints ?
> 
>     Xav
> 
> 

You need to make sure SOFTWARE_SINGLE_STEP_P is not defined to zero before 
including tm-arm.h

Richard.