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* < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> > Date: Oct 12, 2007 6:33 PM > Subject: Error opening framebuffer device/Unknown symbol > register_framebuffer > To: directfb-users@directfb.org <mailto:directfb-users@directfb.org>, > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>. > > > > *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 > > > ------------------------------------------------------------------------ > > _______________________________________________ > directfb-users mailing list > directfb-users@directfb.org > http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users -- Three things are certain: Death, taxes, and lost data. Guess which has occurred. _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
