|Open and parse the specified .INF file when performing conversion. The ndiscvt utility will parse this file and emit a device identification structure and registry key configuration structures which will be used by the ndis(4) driver and ndisapi(9) kernel subsystem. If this is omitted, ndiscvt will emit a dummy configuration structure only.|
|Open and parse the specified .SYS file. This file must contain a Windows[rg] driver image. The ndiscvt utility will perform some manipulation of the sections within the executable file to make runtime linking within the kernel a little easier and then convert the image into a data array.|
|Specify an alternate name for the network device/interface which will be created when the driver is instantiated. If you need to load more than one NDIS driver into your system (i.e., if you have two different network cards in your system which require NDIS driver support), each module you create must have a unique name. Device can not be larger than IFNAMSIZ. If no name is specified, the driver will use the default a default name ("ndis").|
|Specify the output file in which to place the resulting data. This can be any file pathname. If outfile is a single dash (''), the data will be written to the standard output. The if_ndis.c module expects to find the driver data in a file called ndis_driver_data.h, so it is recommended that this name be used.|
Generate both an
The latter file will contain a copy of the
driver image encoded as a
.Fx ELF object file (created with objcopy(1)). Turning the Windows[rg] driver image directly into an object code file saves disk space and compilation time.
A few NDIS drivers come with additional files that the core
driver module will load during initialization time.
these files contain firmware which the driver will transfer to
the device in order to make it fully operational.
these files are usually just copied into one of the system
directories along with the driver itself.
If however the driver is required to bootstrap the system
the NDIS-based network interface is to be used for diskless/PXE
the files need to be pre-loaded by the bootstrap
loader in order to be accessible, since the driver will need them
before the root file system has been mounted.
However, the bootstrap
loader is only able to load files that are shared
The -f flag can be used to convert an arbitrary file firmfile into shared object format (the actual conversion is done using the objcopy(1) and ld(1) commands). The resulting files can then be copied to the /boot/kernel directory, and can be pre-loaded directly from the boot loader prompt, or automatically by editing the loader.conf(5) file. If desired, the files can also be loaded into memory at runtime using the kldload(8) command.
When an NDIS driver tries to open an external file, the ndisapi(9) code will first search for a loaded kernel module that matches the name specified in the open request, and if that fails, it will then try to open the file from the /compat/ndis directory as well. Note that during kernel bootstrap, the ability to open files from /compat/ndis is disabled: only the module search will be performed.
When using the -f flag, ndiscvt will generate both a relocatable object file (with a .o extension) and a shared object file (with a .ko extension). The shared object is the one that should be placed in the /boot/kernel directory. The relocatable object file is useful if the user wishes to create a completely static kernel image: the object file can be linked into the kernel directly along with the driver itself. Some editing of the kernel configuration files will be necessary in order to have the extra object included in the build.
The ndiscvt utility first appeared in
.Fx 5.3 .
.An -nosplit The ndiscvt utility was written by
.An Bill Paul Aq email@example.com . The lex(1) and yacc(1) INF file parser was written by
.An Matthew Dodd Aq mdodd@FreeBSD.org .