Do not use functions from libc, like printf, malloc and free.
Find there equivalent for kernel space modules.
kaka wrote:
Hi All,
Thanks for the overhelming responses.
I was able to remove the problem of Unknown symbols by linking the
proper libraries. Now the problem got reduced to the following messages.
# insmod brcmstfb.ko
brcmstfb: Unknown symbol printf
brcmstfb: Unknown symbol malloc
brcmstfb: Unknown symbol free
insmod: cannot insert `brcmstfb.ko': Unknown symbol in module (2): No
such file or directory
#
for the above problem i had tried to link "libgcc.a " but those symbols
are also undefined in it also.
RECAP:
While running the cross compiled directFB example on MIPS chip,*
We tried to install the framebuffer driver(command given above) after
creating the node fb0.
APPROACH:
Actually the code of frambuffer driver consists of usual kernel
framebuffer code and properitiary graphics lib code.
The properitiary graphics lib code is using malloc,print and free from
<stdlib.h> and that is why those symbols are coming undefined.
Could anybody help in this regard?
Thanks in advance.
kaka
---------- Forwarded message ----------
From: *kaka* < share.kt@xxxxxxxxx <mailto:share.kt@xxxxxxxxx>>
Date: Oct 12, 2007 6:33 PM
Subject: Error opening framebuffer device/Unknown symbol
register_framebuffer
To: directfb-users@xxxxxxxxxxxx <mailto:directfb-users@xxxxxxxxxxxx>,
directfb-dev@xxxxxxxxxxxx <mailto:directfb-dev@xxxxxxxxxxxx>.
*Hi All,*
*While running the cross compiled directFB example on MIPS chip,*
*
We tried to install the framebuffer driver(command given at the bottom) and we have already created the node fb0.*
*We are getting the following error, *
*Can anybody help in this regard ?*
*Thanks in Advance.*
# ../../cross_directfb/simple_mips
=======================| DirectFB 1.0.0 |=======================
(c) 2001-2007 The DirectFB Organization (directfb.org <http://directfb.org/>)
(c) 2000-2004 Convergence (integrated media) GmbH
------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2007-10-05 14:17)
(!) Direct/Util: opening '/dev/fb0' failed
--> No such device or address
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system' core!
--> Initialization error!
simple.c <96>:
(#) DirectFBError [DirectFBCreate (&dfb)]: Initialization error!
#
*While running the following command in MIPS chip, we are getting the following error.*
# insmod brcmstfb.ko
brcmstfb: Unknown symbol unregister_framebuffer
brcmstfb: Unknown symbol printf
brcmstfb: Unknown symbol malloc
brcmstfb: Unknown symbol fb_find_mode
brcmstfb: Unknown symbol fb_dealloc_cmap
brcmstfb: Unknown symbol fb_alloc_cmap
brcmstfb: Unknown symbol framebuffer_release
brcmstfb: Unknown symbol free
insmod: cannot insert `brcmstfb.ko': Unknown symbol in module (2): No such file or directory
#
#
--
Thanks & Regards,
kaka
--
Thanks & Regards,
kaka
------------------------------------------------------------------------
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