vegard

Getting started with Linux kernel development

Prerequisites

The Linux kernel is written in C, so you should have at least a basic understanding of C before diving into kernel work. You don't need expert level C knowledge, since you can always pick some things up underway, but it certainly helps to know the language and to have written some userspace C programs already.

It will also help to be a Linux user. If you have never used Linux before, it's probably a good idea to download a distro and get comfortable with it before you start doing kernel work.

Lastly, knowing git is not actually required, but can really help you (since you can dig through changelogs and search for information you'll need). At a minimum you should probably be able to clone the git repository to a local directory.

muff-in

Assembly Language / Reversing / Malware Analysis / Game Hacking -resources

⭐Assembly Language

Modern x64 Assembly

https://www.youtube.com/playlist?list=PLKK11Ligqitg9MOX3-0tFT1Rmh3uJp7kA

kwilczynski

// Using the && (logical AND) operator.

#define pm_driver_has_callback(__device, __callback) \
        ((__device)->driver && (__device)->driver->pm && (__device)->driver->pm->__callback)

#define pm_driver_do_callback(__device, __callback) \
        (pm_driver_has_callback(__device, __callback) ? (__device)->driver->pm->__callback(__device) : 0)

// Using a statement expression to avoid using ternary operator...

kwilczynski

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/focal64"
  config.vm.provider "virtualbox" do |vb|
     vb.customize [ "modifyvm", :id, "--uartmode1", "file", "/dev/null" ]
  end
end

ChristopherA

Brew Bundle Brewfile Tips

Copyright & License

Unless otherwise noted (either in this file or in a file's copyright section) the contents of this gist are Copyright ©️2020 by Christopher Allen, and are shared under spdx:Creative Commons Attribution Share Alike 4.0 International (CC-BY-SA-4.) open-source license.

Sponsor

If you more tips and advice like these, you can become a monthly patron on my GitHub Sponsor Page for as little as $5 a month; and your contributions will be multipled, as GitHub is matching the first $5,000! This gist is all about Homebrew, so if you like it you can support it by donating to them or becoming one of their Github Sponsors.

kwilczynski

[    5.250222] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
[    5.255513] ------------[ cut here ]------------
[    5.255514] WARN_ON(!IS_PLATFORM(dev_priv, INTEL_SKYLAKE) && !IS_PLATFORM(dev_priv, INTEL_KABYLAKE))
[    5.255562] WARNING: CPU: 3 PID: 518 at drivers/gpu/drm/i915/i915_drv.c:192 intel_pch_type+0x1f3/0x5f0 [i915]
[    5.255563] Modules linked in: i915(+) snd_hda_intel snd_intel_nhlt snd_hda_codec drm_kms_helper snd_hda_core drm snd_hwdep snd_pcm i2c_algo_bit snd_timer fb_sys_fops snd syscopyarea intel_rapl_perf(+) sysfillrect sysimgblt soundcore input_leds intel_pch_thermal pcspkr intel_wmi_thunderbolt serio_raw topstar_laptop sparse_keymap acpi_pad acpi_tad fjes(-) mac_hid zcommon(PO+) znvpair(PO) spl(O) vhost_net vhost tap ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi sunrpc scsi_transport_iscsi ip_tables x_tables autofs4 xfs btrfs xor zstd_compress raid6_pq libcrc32c psmouse i2c_i801 r8169 ahci realtek libahci wmi video
[    5.255579] CPU: 3 PID: 518 Comm: 

kwilczynski

kwilczynski@ubuntu:~$ grpcurl kw-alpha4.us-east1.apps.lbcs.io:443 describe
com.example.myservice.MyService is a service:
service MyService {
  rpc AddItem ( .com.example.myservice.MyAddItem ) returns ( .google.protobuf.Empty ) {
    option (.google.api.http) = { post:"/state/{user_id}/items/add" body:"*"  };
  }
  rpc GetState ( .com.example.myservice.MyGetState ) returns ( .com.example.myservice.MyState ) {
    option (.google.api.http) = { get:"/state/{user_id}" additional_bindings:<get:"/state/{user_id}/items" response_body:"items" >  };
  }
  rpc RemoveItem ( .com.example.myservice.MyRemoveItem ) returns ( .google.protobuf.Empty ) {

smallnest

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"os/signal"
	"syscall"
)

kwilczynski

Problems with italics and the code blocks (inline or otherwie).

Given:

`test _test_`

```
test _test_
```

kwilczynski

diff --git a/include/linux/ip_vs.h b/include/linux/ip_vs.h
index 4deb383..3d4e7af 100644
--- a/include/linux/ip_vs.h
+++ b/include/linux/ip_vs.h
@@ -27,6 +27,18 @@
 #define IP_VS_DEST_F_AVAILABLE	0x0001		/* server is available */
 #define IP_VS_DEST_F_OVERLOAD	0x0002		/* server is overloaded */
 
+ /*
+ *      Advisory flags for slow start.