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Top Forums Programming Running bin file from a module Post 302505667 by Corona688 on Thursday 17th of March 2011 02:29:15 PM
Old 03-17-2011
Quote:
Originally Posted by Chrisdot
Hmm... so if I create simple doing nothing (or printing text to dmesg) kernel space dynamic library, save it wherever on HDD and try to use from device driver - would that work?
You're talking about kernel modules, I think. These can be loaded whenever. Make both these things, your little loader thing and the thing which uses it, both modules, and have the main thing depend on the little thing. Whenever the main module is loaded it will try to load your loader module first. It will look for it in a specific place on the hard drive (/lib/modules/kernel-version/kernel/...).

You can also manually tell the kernel to load a module file whenever with modprobe modulename if the module's installed under /lib/..., or insmod filename.ko to point it to a specific file.

I haven't used module dependencies myself so can't be more specific, sorry.
Quote:
Is there a way to create dynamic library in kernel space and call it from device driver?
Create a dynamic library? As in convert from source code into a module? Creating a module takes gcc and dozens of megs of kernel source, all of which happens in userspace. No.

Again though -- what you do really depends on what the contents of this mysterious "block" are and where it will be and how you must get at it. Do you have any information whatsoever on what it actually is? If not, you really don't have the information you need to write a driver.
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MODSTAT(8)						    BSD System Manager's Manual 						MODSTAT(8)

NAME
modstat -- display status of loaded kernel modules SYNOPSIS
modstat [-n] [name] DESCRIPTION
The modstat utility displays the status of any kernel modules present in the kernel. The options are as follows: -n name Display the status of only the module with this name. Please note that -n is optional. In addition to listing the currently loaded modules' name, the information reported by modstat includes: CLASS Module class, such as "vfs", "driver", "exec", "misc" or "secmodel". SOURCE Where the module was loaded from. "builtin" indicates that the module was built into the running kernel. "boot" indicates that the module was loaded during system bootstrap. "filesys" indicates that the module was loaded from the file system. SIZE Size of the module in bytes. REFS Number of references held on the module. Disabled builtin modules will show a count of -1 here. REQUIRES Additional modules that must be present. EXIT STATUS
The modstat utility exits with a status of 0 on success and with a nonzero status if an error occurs. SEE ALSO
module(7), modload(8), modunload(8) HISTORY
The modstat command was designed to be similar in functionality to the corresponding command in SunOS 4.1.3. BSD
August 2, 2011 BSD
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