Bug 123106 – /proc/kallsyms is missing (kernel 2.6.5-1.358)

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Bug 123106 - /proc/kallsyms is missing (kernel 2.6.5-1.358)

Summary:	/proc/kallsyms is missing (kernel 2.6.5-1.358)

Status:	CLOSED ERRATA

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	kernel (Show other bugs)
Sub Component:
Version:	2
Hardware:	i686 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Dave Jones
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Reported:	2004-05-12 11:15 EDT by Janus N. Tøndering
Modified:	2015-01-04 17:05 EST (History)
CC List:	3 users (show)

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Fixed In Version:
Doc Type:	Bug Fix
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Last Closed:	2005-01-25 01:27:42 EST
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Description Janus N. Tøndering 2004-05-12 11:15:15 EDT

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6)
Gecko/20040207 Firefox/0.8

Description of problem:
I just figured out that the /proc/ksyms file is no more (compiling a
module) and that the (acc. to pages found by google) file's now called
/proc/kallsysm. The problem is that there is no such file on my system.

How reproducible:
Always

Steps to Reproduce:
* compile a module, or
* ls /proc/kallsyms

Comment 1 Arjan van de Ven 2004-05-21 17:01:20 EDT

eh what is proc/kallsyms needed for ???

Comment 2 Janus N. Tøndering 2004-05-30 09:04:13 EDT

From http://www.desktop-linux.net/vmware.htm I got this:
"Replace all occurrences of /proc/ksyms with /proc/kallsyms in
/usr/bin/vmware-config.pl."

So, I assumed that it was needed.

Comment 3 Alexander Sandler 2004-09-19 12:58:55 EDT

Arjan, I encountered the same problem with 2.6.5-1.358. I checked 
with 2.6.8-1.521 - same story - /proc/kallsyms not there!

Apparently, noone calls kallsyms_init() (kernel/kallsyms.c), so 
appending:

#ifdef CONFIG_KALLSYMS
__initcall(kallsyms_init);
#endif

to the end of kernel/kallsyms.c does the trick.

Sasha.

Comment 4 Arjan van de Ven 2004-09-19 14:42:34 EDT

again.. what needs it ?

Comment 5 Alexander Sandler 2004-09-19 17:29:38 EDT

In Fedora Core 2 /proc/kallsyms missing - this file lists all kernel
symbols. It might be usefull when working on kernel module or, as
original poster did, installing Fedora Core 2 on VMWare virtual machine.
As I found, problem relies in kernel. All Fedora Core 2 kernels
released so far, has this problem. Finally, fix I proposed based on
Linuses kernel 2.6.8.1 (the latest one so far).

Sasha.

Comment 6 Timur Tabi 2004-11-22 10:48:22 EST

This bug is a real problem for me.  I need to have /proc/kallsyms.  It
serves two purposes:

1) If a driver can't load because it complains about an unknown
symbol, I can grep kallsyms to see if the symbol is really defined.   

2) Our driver compiles with several different 2.4 and 2.6 versions.  I
use kallsyms to determine which symbols are publically available, and
if a certain symbol is not found, then a warning message is displayed.

Comment 7 Dave Jones 2004-11-27 15:21:54 EST

mass update for old bugs:

Is this still a problem with the 2.6.9 based update kernel ?

Comment 8 Timur Tabi 2004-12-01 11:23:07 EST

Yes, it is.

Comment 9 Dave Jones 2005-01-25 01:27:42 EST

current kernels should have this fixed.

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