Date: Thu, 22 Sep 2005 23:03:01 -0700 (PDT) From: Nate Eldredge <nge@cs.hmc.edu> To: FreeBSD-gnats-submit@FreeBSD.org Subject: amd64/86487: DDB disassembler broken on amd64 Message-ID: <200509230603.j8N631VA001234@vulcan.lan> Resent-Message-ID: <200509230610.j8N6A4v7035169@freefall.freebsd.org>
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>Number: 86487 >Category: amd64 >Synopsis: DDB disassembler broken on amd64 >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Sep 23 06:10:04 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Nate Eldredge >Release: FreeBSD 5.4-RELEASE-p7 amd64 >Organization: >Environment: System: FreeBSD vulcan.lan 5.4-RELEASE-p7 FreeBSD 5.4-RELEASE-p7 #3: Tue Sep 20 16:12:19 PDT 2005 nate@vulcan.lan:/usr/obj/usr/src/sys/VULCAN amd64 >Description: The amd64 disassembler in DDB is rather poor. For instance, it does not comprehend the REX prefix which is used on all 64-bit instructions. They instead get decoded as "inc" and "dec". This makes the disassembly useless, and the debugger hard to use. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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