Re: Which tools to build for ARM elf?

[Richard Earnshaw <rearnsha at arm dot com>]

> Hi,
> 
> I've recently had success building the following tools:
> 
> binutils-2.9.5.029
> gcc-2.95.2
> newlib-1.8.2
> gdb-20000305
> 
> My target for all of these builds was : arm-elf
> My host is i686 Linux.
> My experience in the past has been strictly with
> the ARM SDT. But now I wish to explore using the
> GNU toolchain.
> 
> Here are my questions:
> 
> 1) Does a target of arm-elf also include support for thumb
>    code?

No.  You currently have to build a separate compiler (thumb-elf).  This is 
similar to with the ARM SDT, which has armcc and tcc.  Work is in progress 
to produce a combined arm/thumb version of the compiler.

> 
> 2) Does the gdb build include a type of ARMulator for simulating
>    the arm code?  How is the code simulated?

Yes.  It is based on a version of the ARMulator that ARM released under 
GPL.

> 
> 3) Is simulation as simple as:
> 
>    arm-elf-gcc -g -o hello hello.c
>    arm-elf-gdb test
>    (gdb) run
>    Starting program: /home/projects/Embedded/hello 
>    You can't do that without a process to debug.
>    (gdb) 

You will probably have to add the command "target sim" somewhere, and 
maybe a few other commands (though it is often possible to put these in 
your .gdbinit file.

> 
> Many thanks for your help,
> 

No problem

Richard.



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