iankronquist

.intel_syntax noprefix
# GDT:
# 0x00 NULL
# 0x10 32 bit code
# 0x18 32 bit data
# 0x20 16 bit code ; 64kb limit
# 0x28 16 bit data ; 64kb limit

.extern BootDrive
.extern halt

iankronquist

#![feature(asm)]
#![allow(unused)]
const EI_CLASS: u8 = 4;
const EI_NIDENT: usize = 16;

#[derive(Default,Debug, Copy, Clone)]
#[repr(C,packed)]
struct Elf64Header {
    ident: [u8;EI_NIDENT],
    type_: u16,

iankronquist

#define MPP_MACHINE (0b11 << 11)
#define MPP_SUPERVISOR (0b01 << 11)
#define SPP_SUPERVISOR (1 << 8)
#define MPIE_YES (1 << 7)
#define SPIE_YES (1 << 5)
#define MIE_YES (1 << 3)
#define SIE_YES (1 << 1)

/* Machine external interrupt enable */
#define MIE_MEIE (1 << 11)

iankronquist

Migrating from i3 to Sway on Arch Linux

Refer to the arch wiki: https://wiki.archlinux.org/index.php/Sway

1. Install packages: pacman -S sway weston
2. Copy configuration:

mkdir -p ~/.config/sway
cp ~/.i3/config ~/.config/sway/config

3. When you log in, start sway:

iankronquist

A Young Lady's C++ Primer

(I have been enjoying The Diamond Age, thank you)

C++ was developed in 198X by Bjourne Strousap. It is an improved version of the venerable C programming language. C is excellent at describing low level details in a way which is portable across computers. It is the most influential language of our lifetimes, but unless you're writing an operating system, a hypervisor (AKA Virtual Machine Monitor), or working on an embedded system on a tiny ass microcontroller, it's probably not the right tool for the job.

iankronquist

Programming Paradigms

In programming, a paradigm is an abstract way to understand and solve a problem. A paradigm is like a perspective, a high point from which you can survey the terrain and try to decide the path your journey will take.

Toay, there are three major programming paradigms:

1. Imperative Programming.
2. Object Oriented Programming (OOP).
3. Functional Programming (FP).

In principle any language can be used to program in any paradigm, but in practice certain languages tend to favor certain paradigms.

iankronquist

CPU Reset (CPU 0)
EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000
ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
EIP=00000000 EFL=00000000 [-------] CPL=0 II=0 A20=0 SMM=0 HLT=0
ES =0000 00000000 00000000 00000000
CS =0000 00000000 00000000 00000000
SS =0000 00000000 00000000 00000000
DS =0000 00000000 00000000 00000000
FS =0000 00000000 00000000 00000000
GS =0000 00000000 00000000 00000000

iankronquist

Typing

When programmers talk about typing, most of the time they aren't talking about the odious task of pressing keys on a keyboard (watch any programmer and look to see how much of their time they spend actually typing out code. What you'll see instead is a lot of frowning and staring at the screen with an expression of great consternation as you can see them think "why the hell didn't my code do what I thought?"). Instead they're talking about the types of variables. Now you're probably familiar with the idea that there are numbers and strings and

iankronquist

00000000000000c0 <vmxoff>:
  c0:   e8 00 00 00 00          callq  c5 <vmxoff+0x5>
  c5:   55                      push   %rbp
  c6:   48 89 e5                mov    %rsp,%rbp
  c9:   48 83 ec 10             sub    $0x10,%rsp
  cd:   65 48 8b 04 25 28 00    mov    %gs:0x28,%rax
  d4:   00 00 
  d6:   48 89 45 f8             mov    %rax,-0x8(%rbp)
  da:   31 c0                   xor    %eax,%eax
  dc:   0f 01 c4                vmxoff 

iankronquist

Design of the Kernel of Truth Memory System

• Uses PAE paging.
• Higher half memory model.

Initialized in this order:

0. Bootstrap PAE paging.
1. Kernel heap.
2. Physical allocator.
3. Init process PAE paging.