Re: arm reversible execution query

[paawan oza <paawan1982 at yahoo dot com>]

Hi Michael,

thank you for your reply.

I think you are referring to below line. in process_record.

I386_RECORD_ARCH_LIST_ADD_REG (X86_RECORD_REIP_REGNUM);
  if (record_arch_list_add_end ())
    return -1;


I got it that it has to be saved explicitly by process record arch level.

Thanks,
Oza.


----- Original Message ----
From: Michael Snyder <msnyder@vmware.com>
To: paawan oza <paawan1982@yahoo.com>
Cc: "gdb@sourceware.org" <gdb@sourceware.org>
Sent: Tue, February 1, 2011 12:23:14 AM
Subject: Re: arm reversible execution query

paawan oza wrote:
> 
> Hi all,
> 
> I have been wroking on arm-reversible implementation and doing arm insn part. I 
>am done with framework, and supporting 30-40% on insns till now.
> when I simply test on arm board, I find that,
> 
> all the memory and registers are replayed correctly and recording is 
happening.
> but,
> do I need to save Program counter explicitly ?
> doesnt gdb reversible framework take care of changing pc when I apply 
>reverse-stepi/nexti command ?
> 
> as i386-tdep.c, does not seem to be saving PC explicitly.
> 
> please clarify.


i386-tdep.c does save the PC ($eip), at the end of function i386_process_record.

If you don't save the PC, how can you do a reverse jump?