Specifying a device tree for psim within gdb

Specifying a device tree for psim within gdb

[Julien]

Hi,

I'm using gdb 5.0 on a linux x86 box, configured with
--target=powerpc-unknown-eabi. I want to debug a raw memory image (my
exec+some data) using the psim simulator.

 When I run the simulator directly (powerpc-unknown-eabi-run), I specify
a device-tree (whith a 'file' device to load my image). 
But when I use the debugger I don't know how to specify a device-tree.
The psim doc in sources.redhat.com talks about an attach patch but all
the links seem to be broken. 
Does someone have this patch ? Or is there another way to specify the
device tree within gdb ?

Thanks in advance,

    Julien.

Re: Specifying a device tree for psim within gdb

[Andrew Cagney]

> Hi,
> 
> I'm using gdb 5.0 on a linux x86 box, configured with
> --target=powerpc-unknown-eabi. I want to debug a raw memory image (my
> exec+some data) using the psim simulator.
> 
>  When I run the simulator directly (powerpc-unknown-eabi-run), I specify
> a device-tree (whith a 'file' device to load my image). 
> But when I use the debugger I don't know how to specify a device-tree.
> The psim doc in sources.redhat.com talks about an attach patch but all
> the links seem to be broken. 
> Does someone have this patch ? Or is there another way to specify the
> device tree within gdb ?

try:
	(gdb) target sim <same-options>

Andrew

Re: Specifying a device tree for psim within gdb

[Julien]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1275 bytes --]

le dim 14-10-2001 at 20:01 Andrew Cagney a écrit :
> > Hi,
> > 
> > I'm using gdb 5.0 on a linux x86 box, configured with
> > --target=powerpc-unknown-eabi. I want to debug a raw memory image (my
> > exec+some data) using the psim simulator.
> > 
> >  When I run the simulator directly (powerpc-unknown-eabi-run), I specify
> > a device-tree (whith a 'file' device to load my image). 
> > But when I use the debugger I don't know how to specify a device-tree.
> > The psim doc in sources.redhat.com talks about an attach patch but all
> > the links seem to be broken. 
> > Does someone have this patch ? Or is there another way to specify the
> > device tree within gdb ?
> 
> try:
> 	(gdb) target sim <same-options>
> 
> Andrew
> 
> 
> 
Thanks all, my image runs now within gdb.
gdb didn't want to start or load at first since I was only giving it a
symbol-file (and no exec) since my device tree was :
/openprom/init/file
/openprom/init/file/file-name psim.boot  # raw image with exec in it
/openprom/init/file/real-address 0x4000
/openprom/init/register/pc 0x4000

So I put a fake exec (loaded at a higher address) with just 
	.text
_start:
	ba 0x4000

and gave it as the program to debug for gdb and it ran fine.

Julien.


-- 

Julien Ducourthial (jducourt@noos.fr)

Re: Specifying a device tree for psim within gdb

[Mark Peek]

At 8:02 PM +0200 10/14/01, Julien wrote:
>I'm using gdb 5.0 on a linux x86 box, configured with
>--target=powerpc-unknown-eabi. I want to debug a raw memory image (my
>exec+some data) using the psim simulator.
>
>  When I run the simulator directly (powerpc-unknown-eabi-run), I specify
>a device-tree (whith a 'file' device to load my image).
>But when I use the debugger I don't know how to specify a device-tree.
>The psim doc in sources.redhat.com talks about an attach patch but all
>the links seem to be broken.
>Does someone have this patch ? Or is there another way to specify the
>device tree within gdb ?

I couldn't find an "attach patch" either. I believe it was folded 
into gdb. You can specify arguments to the simulator either at the 
gdb command prompt or in the .gdbinit file using the target command. 
I'm currently using this in my .gdbinit:

target sim -e chirp -r 33554432
set architecture powerpc:604
load

You can specify device tree information on the target line using -o 
for individual entries or -f to specify a file with the device tree 
to be merged in.

Mark