How to Build and Load the Layered Driver

1. Compile the driver.

   Use the -D_KERNEL option to indicate that this is a kernel module.

   • If you are compiling for a SPARC architecture, use the -xarch=v9 option:

     % cc -c -D_KERNEL -xarch=v9 lyr.c

   • If you are compiling for a 32-bit x86 architecture, use the following command:

     % cc -c -D_KERNEL lyr.c

2. Link the driver.

   % ld -r -o lyr lyr.o

3. Install the configuration file.

   As user root, copy the configuration file to the kernel driver area of the machine:

   # cp lyr.conf /usr/kernel/drv

4. Install the driver binary.

   • As user root, copy the driver binary to the sparcv9 driver area on a SPARC architecture:

     # cp lyr /usr/kernel/drv/sparcv9

   • As user root, copy the driver binary to the drv driver area on a 32-bit x86 architecture:

     # cp lyr /usr/kernel/drv

5. Load the driver.

   As user root, use the add_drv(1M) command to load the driver.

   # add_drv lyr

   List the pseudo devices to confirm that the lyr device now exists:

   # ls /devices/pseudo | grep lyr lyr@1 lyr@1:node