Mirror of the gdb mailing list
 help / color / mirror / Atom feed
From: paawan oza <paawan1982@yahoo.com>
To: Hui Zhu <teawater@gmail.com>
Cc: Thiago Jung Bauermann <bauerman@br.ibm.com>,
	gdb ml <gdb@sourceware.org>,
	  Pedro Alves <pedro@codesourcery.com>,
	  Marc Khouzam <marc.khouzam@ericsson.com>,
	  Michael Snyder <msnyder@vmware.com>,
	Eli Zaretskii <eliz@gnu.org>,
	  Mark Kettenis <mark.kettenis@xs4all.nl>
Subject: MMX & Floating point insn suport for reversible debugging
Date: Wed, 13 May 2009 16:17:00 -0000	[thread overview]
Message-ID: <407871.4297.qm@web36202.mail.mud.yahoo.com> (raw)


Hi Hui,

file : linux-tdep.c
function : i386_process_record

here I start adding floating point register support.
I think it records the memory

so remaining thing for floating point is store registers st0 to st7.


code to be added here...
   /* floats */
      /* It just record the memory change of instrcution. */
    case 0xd8:
    case 0xd9:
    case 0xda:
    case 0xdb:
    case 0xdc:
    case 0xdd:
    case 0xde:
    case 0xdf:


I am not sure ptrace will give FPU affected flags !!!

and another thing is ; 
take floating point insn 
opcode  mnemnic   desc
DE F9   FDIVP     Divide ST(1) by ST(0), 
                  store result in ST(1), and pop the register stack.

I do not think code is taking care of 2 bytes floating instruction..
I suspoe ModR/M and SIB byte encoding is taken care with respect to floating point.

please clarify.

Regards,
Oza.







      


             reply	other threads:[~2009-05-13 16:17 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-13 16:17 paawan oza [this message]
2009-05-13 16:38 ` Hui Zhu
2009-05-13 16:44 paawan oza
2009-05-14  7:11 ` Hui Zhu
2009-05-15 14:16 paawan oza

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=407871.4297.qm@web36202.mail.mud.yahoo.com \
    --to=paawan1982@yahoo.com \
    --cc=bauerman@br.ibm.com \
    --cc=eliz@gnu.org \
    --cc=gdb@sourceware.org \
    --cc=marc.khouzam@ericsson.com \
    --cc=mark.kettenis@xs4all.nl \
    --cc=msnyder@vmware.com \
    --cc=pedro@codesourcery.com \
    --cc=teawater@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox