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<p class="MsoNormal"><span lang="EN-US">Hello Li,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for the information.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It can fulfil my need.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Patrick Agrain<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>De :</b> crash-utility-bounces@redhat.com [mailto:crash-utility-bounces@redhat.com]
<b>De la part de</b> Li Yueyi<br>
<b>Envoyé :</b> vendredi 5 mars 2021 09:44<br>
<b>À :</b> Discussion list for crash utility usage, maintenance and development <crash-utility@redhat.com><br>
<b>Objet :</b> EXT: Re: [Crash-utility] Address - Symbol correspondance<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:orange"><span style="font-size:14.0pt;color:red">** External email - Please consider with caution **</span><o:p></o:p></p>
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<p class="MsoNormal">Hi Patrick,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Try 'dis' command, like:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">crash> dis 0xffffffffa4099980<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:13.0pt">Li Yueyi</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:13.0pt">Send by my mobile phone.</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">在</span> 2021<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">年</span>3<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">月</span>5<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">日，</span>16:19<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">，</span>Agrain
Patrick <<a href="mailto:patrick.agrain@al-enterprise.com">patrick.agrain@al-enterprise.com</a>>
<span lang="ZH-TW" style="font-family:"Microsoft JhengHei",sans-serif">写道：</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Hello all,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Target runs a CentOS8 kernel with KASLR enabled.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I triggered a crash on it for training purpose with ‘echo c > /proc/sysrq-trigger’.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I analyze the produced dumpfile on another machine where I setup all sources and required debuginfo packages.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">So far, so good, the backtrace list is complete.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">But I tried to match address to symbol, I have something like that (e.g. for proc_reg_write() ):</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New"">crash> info address proc_reg_write</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New"">Symbol "proc_reg_write" is a function at address 0xffffffffa4099980.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New"">crash> info symbol 0xffffffffa4099980</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New"">No symbol matches 0xffffffffa4099980.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Is there a more ‘elegant’ way to retrieve the symbol from address than to perform an ‘objdump’ request on the vmlinux.debug binary ?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Have I missed an option for a command ?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Note: I get the same behavior with ‘crash --kaslr auto’ than with ‘crash’.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Patrick Agrain</span><o:p></o:p></p>
<p class="MsoNormal">--<br>
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