Date: Mon, 13 Oct 2003 13:49:35 -0700 (PDT) From: Dan Strick <strick@covad.net> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/57976: simple kernel DDB enhancement Message-ID: <200310132049.h9DKnZ4B000947@ice.nodomain> Resent-Message-ID: <200310132050.h9DKoOb7065014@freefall.freebsd.org>
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>Number: 57976
>Category: kern
>Synopsis: simple kernel DDB enhancement
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Mon Oct 13 13:50:24 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator: Dan Strick
>Release: FreeBSD in general
>Organization:
>Environment:
System: FreeBSD ice 4.8-RELEASE FreeBSD 4.8-RELEASE #0: Sun Apr 6 21:47:39 PDT 2003 root@ice:/usr/src/sys/compile/ICE i386
>Description:
This is not bug report but a request for a trivial but potentially very
useful enhancement to the kernel DDB facility. In function db_examine()
in the source file /sys/ddb/db_examine.c, add something like this:
case 'S': /* symbolic */
value = db_get_value(addr, size, FALSE);
addr += size;
db_printsym(value, DB_STGY_ANY);
break;
to the examine format switch, for example just before the line:
case 'c': /* character */
This would create a new examine modifer format that expresses a value
as a global_symbol+offset instead of just a non-obvious number.
This might be very useful when examining pointers in memory.
Presumably the DDB(4) man page would also be modified to mention
the new format. This would also be a good time to add a description
of the DDB "panic" command which has somehow escaped mention on
the man page.
Dan Strick
strick@covad.net
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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