mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 18:25:57 +01:00
57 lines
1.6 KiB
Bash
Executable File
57 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
set -ex
|
|
|
|
# Our modules does not the PCI device yet.
|
|
lspci -k
|
|
# => 00:04.0 Class 00ff: 1234:11e8 lkmc_pci
|
|
|
|
# Interrupt counts before we generate our interrupts.
|
|
cat /proc/interrupts
|
|
|
|
# Setup.
|
|
insmod /pci.ko
|
|
/mknoddev.sh lkmc_pci
|
|
|
|
# Shows that this module owns the PCI device.
|
|
lspci -k
|
|
# => 00:04.0 Class 00ff: 1234:11e8 lkmc_pci
|
|
|
|
# Identifiction: just returns some fixed magic bytes.
|
|
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=0 | od -An -t x1
|
|
# => 010000ed
|
|
|
|
# Negator. Sanity check that the hardware is getting updated.
|
|
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=1 | od -An -t x1
|
|
printf '\xF0\xF0\xF0\xF0' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=1
|
|
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=1 | od -An -t x1
|
|
# => 0F0F0F0F
|
|
|
|
# Factorial calculator.
|
|
# Request interrupt when the computation is over.
|
|
printf '\x80\x00\x00\x00' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=8
|
|
# factorial(0xC) = 0x1c8cfc00
|
|
printf '\x0C\x00\x00\x00' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=2
|
|
# => irq_handler .*
|
|
# Yes, we should use the interrupt to notify poll, but lazy.
|
|
sleep 1
|
|
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=2 | od -An -t x1
|
|
dd bs=4 status=none if=/dev/lkmc_pci count=1 skip=8 | od -An -t x1
|
|
# => 1c8cfc00
|
|
|
|
# Manual IRQ raising.
|
|
printf '\x04\x03\x02\x01' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=24
|
|
# => irq_handler .*
|
|
sleep 1
|
|
printf '\x08\x07\x06\x05' | dd bs=4 status=none of=/dev/lkmc_pci count=1 seek=24
|
|
# => irq_handler .*
|
|
sleep 1
|
|
|
|
# Teardown.
|
|
rm /dev/lkmc_pci
|
|
rmmod pci
|
|
|
|
# Interrupt counts after we generate our interrupts.
|
|
# Compare with before.
|
|
cat /proc/interrupts
|