how to test arm-tdep.c (with cross compiled gdbserver) using gdbserver ?

how to test arm-tdep.c (with cross compiled gdbserver) using gdbserver ?

[paawan oza]

Hi all,

suppose some changes are done in arm.-tdep.c (not linux related changes, but 
bare metal changes)
this is regarding reversible-debugging.

now, is it possible that I cross compile gdbserver for arm and put it on target.
then; have tcl/expect tests things running on x86 which remotely connects to 
gdbserver ?
will that test i386-tdep.c reversible ?

but I am not sure how do we get arm-tdep.c into picture from host ?

Regards,
Oza.

Re: how to test arm-tdep.c (with cross compiled gdbserver) using gdbserver ?

[paawan oza]

Hi,

I have done following, and with that should be able to test arm-reversible 
stuffs with gdbserver.

> ./configure --target=arm-linux     <which will compile gdb for x86 takes arm 
>dependent code into build>
> make

> cd gdb
> cd gdbserver
> ./configure --host=arm-none-linux-gnueabi --target=arm-none-linux-gnueabi 

<above will preparegbserver for target, whihc could be later copied to arm 
board>

there are other targets such as arm-eabi, arm-elf.
but I am using arm-linux, hope thats ok and it works.

Regards,
Oza.




----- Original Message ----
From: paawan oza <paawan1982@yahoo.com>
To: gdb@sourceware.org
Cc: chandra krishnappa <chandra_roadking@yahoo.com>
Sent: Sat, July 23, 2011 11:38:11 AM
Subject: how to test arm-tdep.c (with cross compiled gdbserver)  using gdbserver 
?

Hi all,

suppose some changes are done in arm.-tdep.c (not linux related changes, but 
bare metal changes)
this is regarding reversible-debugging.

now, is it possible that I cross compile gdbserver for arm and put it on target.
then; have tcl/expect tests things running on x86 which remotely connects to 
gdbserver ?
will that test i386-tdep.c reversible ?

but I am not sure how do we get arm-tdep.c into picture from host ?

Regards,
Oza.

Re: how to test arm-tdep.c (with cross compiled gdbserver) using gdbserver ?

[Yao Qi]

On 07/25/2011 11:56 AM, paawan oza wrote:
> I have done following, and with that should be able to test arm-reversible 
> stuffs with gdbserver.
> 
>> > ./configure --target=arm-linux     <which will compile gdb for x86 takes arm 
>> >dependent code into build>
>> > make
>> > cd gdb
>> > cd gdbserver
>> > ./configure --host=arm-none-linux-gnueabi --target=arm-none-linux-gnueabi 
> <above will preparegbserver for target, whihc could be later copied to arm 
> board>
> 

That looks right to me.  You have to build a gdb for arm, as you did
above, and then cross-compile gdbserver for arm-linux.

> there are other targets such as arm-eabi, arm-elf.
> but I am using arm-linux, hope thats ok and it works.

IMO, it works, since your reverse code on arm shares among these arm-*
targets.  Testing your code on arm-linux should cover other arm-* targets.

However, there may be some corner cases, such as svc instruction, that
may behave a little different on bare-mental targets (arm-eabi, arm-elf)
and linux targets (arm-linux).  I am not familiar with reverse
debugging, so I don't know how much affect of this difference to reverse
debugging.  (I might be wrong, of course.)

-- 
Yao (齐尧)