[coLinux-users] Loadable kernel modules

[jitubhai a. <jit...@re...>]

Hi,=0AI use colinux version 0.8.0 on linux as a host.=0AI was able to inser=
t a simplistic kernel module in the guest.=0A=0AHowever, when I include lin=
ux/cooperative_internal.h it gives me errors.  following is a simple kernel=
 module that dosen't work =0A=0A#include <linux/kernel.h> /* Needed for KER=
N_ALERT */=0A#include <linux/module.h> /* Needed by all modules */=0A#inclu=
de <linux/unistd.h>=0A#include <linux/cooperative_internal.h>=0A#include <l=
inux/string.h>=0A=0A=0Aint init_module(void)=0A{=0A    unsigned long flags;=
=0A    co_passage_page_assert_valid();=0A    co_passage_page_acquire(&flags=
);=0A    co_passage_page->operation =3D CO_OPERATION_PRINTK;=0A    co_passa=
ge_page->params[0] =3D strlen("We did this!");=0A    strcpy(co_passage_page=
->params[1], "We did this!");=0A    co_switch_wrapper();=0A    co_passage_p=
age_release(flags);=0A    printk("Hello world 1.\n");=0A    return 0;=0A}=
=0Avoid cleanup_module(void)=0A{=0A    printk("Goodbye world 1.\n");=0A}=0A=
 =0A=0Athe errors we get are as follows :=0A=0Amake -C /lib/modules/2.6.15-=
co-0.8.0/build M=3D/root modules=0Amake[1]: Entering directory `/root/linux=
-2.6.15'=0A  CC [M]  /root/hello.o=0A/root/hello.c: In function `init_modul=
e':=0A/root/hello.c:18: warning: passing arg 1 of `strcpy' makes pointer fr=
om integer without a cast=0A  Building modules, stage 2.=0A  MODPOST=0A*** =
Warning: "co_passage_page_release" [/root/hello.ko] undefined!=0A*** Warnin=
g: "co_switch_wrapper" [/root/hello.ko] undefined!=0A*** Warning: "co_passa=
ge_page_acquire" [/root/hello.ko] undefined!=0A*** Warning: "co_passage_pag=
e_held" [/root/hello.ko] undefined!=0A  CC      /root/hello.mod.o=0A  LD [M=
]  /root/hello.ko=0Amake[1]: Leaving directory `/root/linux-2.6.15'=0A=0A=
=0AWhy can't it find the functions if linux/cooperative_internal.h is inclu=
ded?... do i have to insert this module in the host kernel??=0A(Another obs=
ervation.. don't know how relevant it is in the context.. but anyways, all =
symbols NOT defined extern in cooperative_internal.h work fine.. all declar=
ed extern don't)