Red Hat ENTERPRISE LINUX 3 - DEVELOPER TOOLS GUIDE Especificações descarregar pdf (Página 62)

Red Hat Enterprise Linux to Oracle Solaris Porting Guide

init_module() in Linux initializes a loadable module entry. In Oracle Solaris, _init() initializes a loadable module.

Within an _init() call, you need to call another function

called mod_install() that takes the modlinkage struct

as an argument.

delete_module() in Linux deletes a loadable module. mod_remove() is used to remove module in Oracle Solaris.

mod_remove() needs to be called from within _fini().

#include <sys/modctl.h>

int mod_remove(struct modlinkage *modlinkage);

int _fini(void)

{

int i;

if ((i = mod_remove(&modlinkage)) !=

cmn_err(CE_NOTE,"Could not remove

module\n");

else

cmn_err(CE_NOTE,"flkm:

successfully removed");

return i;

}

Necessary Compiler Options, Linker Options, and Linked Libraries

TABLE 6-4. COMPILATION STEPS AND MAKEFILE CHANGES

RHEL ORACLE SOLARIS 11

A typical kernel module compilation command will look as

shown below:

gcc -O2 -DMODULE -D__KERNEL__ -W -Wall -

Wstrict-prototypes -Wmissing-prototypes -

isystem /lib/modules/`uname -r`/build/include

-c flkm.c -o flkm

Compiling a module is very simple. All you need to set are

some definitions that tell the included code this will be a kernel

module and not a normal executable. You should always link

your module's object file with the -r option; otherwise, the

module will not load, because the kernel module linker will not

be able to link the module.

gcc -D_KERNEL -DSVR4 -DSOL2 -O2 -c flkm.c ld -

o flkm -r flkm.o

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Red Hat ENTERPRISE LINUX 3 - DEVELOPER TOOLS GUIDE Especificações Página 62