arm-elf-run and ANSI escape sequences

[Daniel Jacobowitz]

On Fri, May 27, 2005 at 12:02:30PM -0700, Shaun Jackman wrote:
> First off, let me just say how impressed I am with the ARM simulator!
> It astounds me that I can run a binary intended for my embedded
> platform with no modification on my development machine.
> 
> I'm running an ARM binary using arm-elf-run that makes use of ANSI
> escape sequences to control the terminal emulator (konsole in my
> case). Clear screen, "\33[2J", works fine. But the combination of save
> cursor, "\33[s", and restore cursor, "\33[u" does not. If the answer
> is "That does not work." that'd be fine. I'm just a little curious
> where it's gone wrong. I figured the escape sequences would be passed
> right on through to the terminal emulator, and no-one would ever know
> the binary's being run by an ARM simulator. If I compile the
> application natively (using gcc instead of arm-elf-gcc) and run it,
> save cursor and restore cursor work as expected.
> 
> I no very little (ok, nothing) about the internals of gdb, but if gdb
> sets up a pseudo-teletype for the child process, perhaps the
> save-cursor function does not work with this pseudo-teletype?

GDB doesn't use ptys.  You'll need to find out what is actually being
written to the screen.

-- 
Daniel Jacobowitz
CodeSourcery, LLC