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Re: arm reversible execution query
- From: paawan oza <paawan1982 at yahoo dot com>
- To: Michael Snyder <msnyder at vmware dot com>
- Cc: "gdb at sourceware dot org" <gdb at sourceware dot org>
- Date: Mon, 31 Jan 2011 19:20:51 -0800 (PST)
- Subject: Re: arm reversible execution query
- References: <442684.38194.qm@web112512.mail.gq1.yahoo.com> <4D309B17.7020400@vmware.com> <610357.40561.qm@web112518.mail.gq1.yahoo.com> <4D47051A.4080609@vmware.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?