Developing a Multithreaded Kernel From Scratch!

Readme

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1. Introduction

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1. What Is Memory

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2. The Boot Process

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3. Installing What We Need For Real Mode Development

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1. Hello World Bootloader

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1. Hello World Bootloader Commit

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2. Understanding Real Mode

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3. Segmentation Memory Model

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4. Improving Our Bootloader

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5. Preparing our bootloader to be booted on real hardware

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6. Writing our bootloader to a USB stick

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7. Booting the bootloader

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8. The Interrupt Vector Table Explained

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9. Implementing our own interrupts in real mode

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10. Disk Access And How It Works

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11. Reading from the hard disk

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1. What is Protected Mode

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2. Source code

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2. Switching To Protected Mode

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3. Restructuring Our Project

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4. Enabling the A20 line

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4. Source Code

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5. Creating a Cross Compiler So We Can Code In C

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6. Loading our 32 bit kernel into memory and working with debugging symbols

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6. Source Code

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7. Cleaning our object files

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7. Source Code

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8. Dealing With Alignment Issues

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8. Source Code

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9. C Code In Protected Mode

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9. Source Code

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10. Text Mode Explained

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11. Source Code

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11. Writing To The Screen, Hello World Tutorial

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12. Interrupt Descriptor Table Explained

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13. Implementing The Interrupt Descriptor Table

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13. Source Code

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14. Implementing In and Out Functions

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14. Source Code

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15. Programmable Interrupt Controller Explained

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15. Source Code

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16. Programmable Interrupt Controller Implementation

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16. Source Code

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17. Understanding The Heap And Memory Allocation

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18. Implementing Our Heap

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18. Source Code

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19. Creating the enable interrupts function

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19. Source Code

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20. Understanding Paging

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21. Implementing Paging

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21. Source Code

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22. Modifying the page table

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22. Source Code

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23. Preparing To Read From The Hard Disk

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24. Reading from the disk in C with the ATA controller

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24. Source Code

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25. Improving Our Disk Driver

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25. Source Code

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26. What is a filesystem

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27. Creating a path parser

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27. Source Code

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28. Creating a disk stream

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28. Source Code

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29. File Allocation Table Explained

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30. Source Code

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30. Starting To Create our FAT File system

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31. Understanding the VFS(Virtual File System) Layer

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32. Implementing our virtual filesystem core functionality

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32. Source Code

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33. implementing FAT16 filesystem driver core functionality

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33. Source Code

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34. Implementing FAT16 Structures

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34. Source Code

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35. Implementing The FAT16 Resolver Function

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35. Source Code

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36. Implementing the VFS fopen function

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36. Source Code

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37. Implementing FAT16 fopen function

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37. Source Code

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38. Implementing the VFS fread function

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38. Source Code

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39. Implementing FAT16 fread functionality

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39. Source Code

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40. Implementing the VFS fseek functionality

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40. Source Code

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41. Implementing the FAT16 fseek functionality

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41. Source Code

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42. Implementing the fstat VFS functionality

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42. Source Code

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43. Implementing the FAT16 fstat function

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43. Source Code

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44. Implementing the VFS fclose functionality

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44. Source Code

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45. Implementing the FAT16 fclose functionality

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45. Source Code

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46. Implementing a kernel panic

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46. Source Code

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47. Understanding User Land

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48. Changing our kernel segment and data descriptors to be written in C

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48. Source Code

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49. Implementing The TSS(Task Switch Segment)

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49. Source Code

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50. Implementing Task Foundations

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50. Source Code

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51. Implementing Process Foundations Part 1

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51. Source Code

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52. Implementing Process Foundations Part 2

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52. Source Code

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53. Packing the GDT

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53. Source Code

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54. Implementing User Land Functionality

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54. Source Code

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55. Creating our first user process application

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55. Source Code

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56. Executing the process and dropping into user land privileges

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56. Source Code

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57. Changing the paging functionality

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57. Source Code

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58. Talking with the kernel from userland

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59. Creating the interrupt 0x80 for user process to kernel communication

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59. Source Code

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60. Creating the ability to create and execute kernel commands

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60. Source Code

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61. Creating our first kernel command

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61. Source Code

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62. Calling our kernel command

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62. Source Code

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63. Copying strings from the tasks process

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63. Source Code

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63. Source Code Minor Change

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64. Reading the task's stack

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64. Source Code

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65. Creating the print command in the kernel

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65. Source Code

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66. Understanding keyboard access in protected mode

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67. Creating the virtual keyboard layer

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67. Source Code

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68. Creating the PS2 port keyboard driver part 1

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68. Source Code

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69. Improving our interrupt descriptor table design

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69. Source Code

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70. Creating a cleaner way to create interrupt handlers in the interrupt descriptor

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70. Source Code

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71. Changing The Current Process

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71. Source Code

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72. Creating the PS2 port keyboard driver part 2

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72. Source Code

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73. Getting a key from the keyboard buffer in user land

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73. Source Code

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74. Creating a putchar command that writes one character to the terminal

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74. Source Code

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75. Implementing backspace in the terminal

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75. Source Code

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76. Revising our stream reader

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76. Source Code

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77. Elf Files Explained

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78. Implementing The Elf Loader - Part 1

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78. Source Code

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79. Implementing The Elf Loader - Part 2

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79. Source Code

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80. Implementing The Elf Loader - Part 3

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80. Source Code

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81. Implementing The Elf Loader - Part 4

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81. Source Code

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82. Implementing The Elf Loader - Part 5

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82. Source Code

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83. Implementing The Elf Loader - Part 6

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83. Source Code

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84. Source Code

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84. Writing User Programs In C

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85. Implementing system print in stdlib

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85. Source Code

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85. Source Code - Revised (Use this one)

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86. Implementing system get key in stdlib

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86. Source Code

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87. Implementing Malloc In Our stdlib

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87. Source Code

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88. Implementing Free In Our stdlib

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88. Source Code

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89. Changing the way we map virtual pages for the process

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89. Source Code

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90. Implementing itoa function

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90. Source Code

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91. Implementing the putchar function

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91. Source Code

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92. Implementing the printf function

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92. Source Code

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93. Implementing the ability to read lines

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93. Source Code

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94. Creating a shell

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94. Source Code

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95. Loading other programs from our shell

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95. Source Code

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96. Creating some important stdlib functions

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96. Source Code

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97. Memory Mapping malloc in stdlib

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97. Source Code

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98. Memory Unmapping free In stdlib

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98. Source Code

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99. Process arguments - Part 1

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99. Source Code

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100. Process Arguments - Part 2

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100. Source Code

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101. Process Arguments - Part 3

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101. Source Code

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102. Implementing A 'System' Command

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102. Source Code

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103. Implementing program termination

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103. Source Code

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104. Handling program crashes

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104. Source Code

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105. Creating an exit command

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105. Source Code

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106. Handling caps lock, upper case and lower case letters

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106. Source Code

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107. Running multiple tasks at the same time multi-tasking

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107. Source Code

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1. README

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2. Changing our fat16_new_fat_item_for_directory_item function

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3. Changing our fat16_open function

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3. Source Code

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4. Changing our fat16_get_root_directory function

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4. Source Code

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5. Changing our process_load_binary function

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5. Source Code

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6. Improvements to our fat16_to_proper_string function

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6. Source Code

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7. Changing our restore_general_purpose_registers function

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7. Source Code

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8. Final Kernel Improvements

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8. Source Code

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1. Assembly Catchup!

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2. What is assembly language

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3. Emu8086 Download

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3. Installing the emulator

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4. Hello World In Assembly

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5. Transistors And Logic Gates Understanding The Processor

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6. Registers in the 8086

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7. Segmentation Memory Model Explained

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8. The Stack, Subroutines And Endiness Explained

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1. Bonus Lecture

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1. Kernel Development Books

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