<font><font face="courier new,monospace"><br></font></font><br><div class="gmail_quote">On Thu, Jan 12, 2012 at 9:43 PM, Bansal Aneesh-B39320 <span dir="ltr"><<a href="mailto:B39320@freescale.com">B39320@freescale.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal">Hello,<u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal">PowerPC uses two alternate time base registers which are read from user space<u></u><u></u></p>
<p class="MsoNormal">by using PPC instructions mfatbu and mfatbl . However these instructions are<u></u><u></u></p>
<p class="MsoNormal">not supported by Valgrind.<u></u><u></u></p>
<p class="MsoNormal">CPU : e500mc<u></u><u></u></p>
<p class="MsoNormal">Here are the logs when an application executing such instruction is executed<u></u><u></u></p>
<p class="MsoNormal">with Valgrind 3.7.0:<u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">dis_proc_ctl(ppc)(mfspr,SPR)(0x20F)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">disInstr(ppc): unhandled instruction: 0x7C0F82A6<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> primary 31(0x1F), secondary 678(0x2A6)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== valgrind: Unrecognized instruction at address 0x10003dfc.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== at 0x10003DFC: ??? (in /usr/bin/simple_crypto)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== by 0x1000181B: ??? (in /usr/bin/simple_crypto)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== by 0xFE179E7: ??? (in /lib/<a href="http://libpthread-2.13.so" target="_blank">libpthread-2.13.so</a>)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== by 0x40EEA9B: ??? (in /lib/<a href="http://libc-2.13.so" target="_blank">libc-2.13.so</a>)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== Your program just tried to execute an instruction that Valgrind<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== did not recognise. There are two possible reasons for this.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== 1. Your program has a bug and erroneously jumped to a non-code<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== location. If you are running Memcheck and you just saw a<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== warning about a bad jump, it's probably your program's fault.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== 2. The instruction is legitimate but Valgrind doesn't handle it,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== i.e. it's Valgrind's fault. If you think this is the case or<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== you are not sure, please let us know and we'll try to fix it.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== Either way, Valgrind will now raise a SIGILL signal which will<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">==2204== probably kill your program.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><u></u> <u></u></span></p>
<p class="MsoNormal">We have developed a patch to fix the issue and submitted<span style="font-size:10.0pt;font-family:"Courier New"">
</span>the patch upstream to Valgrind community for processing.</p></div></div></blockquote><div><br><br>how about you also submit the patch to oe-core as well<br>so we can use it until the upstream patch lands in a release<br>
that we will use<br> <br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal">
<span style="font-size:10.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><b>Aneesh Bansal<u></u><u></u></b></p>
<p class="MsoNormal"><b><img src="" height="30" width="97"><u></u><u></u></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Plot No. – 18 | Sector-16 A, Noida – 201301<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Phone : 0120395 x3320<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
<br>_______________________________________________<br>
Openembedded-core mailing list<br>
<a href="mailto:Openembedded-core@lists.openembedded.org">Openembedded-core@lists.openembedded.org</a><br>
<a href="http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core" target="_blank">http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core</a><br>
<br></blockquote></div><br>