├── Makefile ├── mypcb.h ├── myinterrupt.c ├── mymain.c ├── README.md ├── mykernel_for_linux3.9.4sc.patch ├── mykernel-2.0_for_linux-5.4.34.patch └── LICENSE /Makefile: -------------------------------------------------------------------------------- 1 | # 2 | # Makefile for the linux mykernel. 3 | # 4 | 5 | obj-y = mymain.o myinterrupt.o 6 | 7 | -------------------------------------------------------------------------------- /mypcb.h: -------------------------------------------------------------------------------- 1 | /* 2 | * linux/mykernel/mypcb.h 3 | * 4 | * Kernel internal PCB types 5 | * 6 | * Copyright (C) 2013 Mengning 7 | * 8 | */ 9 | 10 | #define MAX_TASK_NUM 4 11 | #define KERNEL_STACK_SIZE 1024*2 12 | /* CPU-specific state of this task */ 13 | struct Thread { 14 | unsigned long ip; 15 | unsigned long sp; 16 | }; 17 | 18 | typedef struct PCB{ 19 | int pid; 20 | volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ 21 | unsigned long stack[KERNEL_STACK_SIZE]; 22 | /* CPU-specific state of this task */ 23 | struct Thread thread; 24 | unsigned long task_entry; 25 | struct PCB *next; 26 | }tPCB; 27 | 28 | void my_schedule(void); 29 | 30 | -------------------------------------------------------------------------------- /myinterrupt.c: -------------------------------------------------------------------------------- 1 | /* 2 | * linux/mykernel/myinterrupt.c 3 | * 4 | * Kernel internal my_timer_handler 5 | * Change IA32 to x86-64 arch, 2020/4/26 6 | * 7 | * Copyright (C) 2013, 2020 Mengning 8 | * 9 | */ 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | #include "mypcb.h" 17 | 18 | extern tPCB task[MAX_TASK_NUM]; 19 | extern tPCB * my_current_task; 20 | extern volatile int my_need_sched; 21 | volatile int time_count = 0; 22 | 23 | /* 24 | * Called by timer interrupt. 25 | * it runs in the name of current running process, 26 | * so it use kernel stack of current running process 27 | */ 28 | void my_timer_handler(void) 29 | { 30 | if(time_count%1000 == 0 && my_need_sched != 1) 31 | { 32 | printk(KERN_NOTICE ">>>my_timer_handler here<<<\n"); 33 | my_need_sched = 1; 34 | } 35 | time_count ++ ; 36 | return; 37 | } 38 | 39 | void my_schedule(void) 40 | { 41 | tPCB * next; 42 | tPCB * prev; 43 | 44 | if(my_current_task == NULL 45 | || my_current_task->next == NULL) 46 | { 47 | return; 48 | } 49 | printk(KERN_NOTICE ">>>my_schedule<<<\n"); 50 | /* schedule */ 51 | next = my_current_task->next; 52 | prev = my_current_task; 53 | if(next->state == 0)/* -1 unrunnable, 0 runnable, >0 stopped */ 54 | { 55 | my_current_task = next; 56 | printk(KERN_NOTICE ">>>switch %d to %d<<<\n",prev->pid,next->pid); 57 | /* switch to next process */ 58 | asm volatile( 59 | "pushq %%rbp\n\t" /* save rbp of prev */ 60 | "movq %%rsp,%0\n\t" /* save rsp of prev */ 61 | "movq %2,%%rsp\n\t" /* restore rsp of next */ 62 | "movq $1f,%1\n\t" /* save rip of prev */ 63 | "pushq %3\n\t" 64 | "ret\n\t" /* restore rip of next */ 65 | "1:\t" /* next process start here */ 66 | "popq %%rbp\n\t" 67 | : "=m" (prev->thread.sp),"=m" (prev->thread.ip) 68 | : "m" (next->thread.sp),"m" (next->thread.ip) 69 | ); 70 | } 71 | return; 72 | } 73 | -------------------------------------------------------------------------------- /mymain.c: -------------------------------------------------------------------------------- 1 | /* 2 | * linux/mykernel/mymain.c 3 | * 4 | * Kernel internal my_start_kernel 5 | * Change IA32 to x86-64 arch, 2020/4/26 6 | * 7 | * Copyright (C) 2013, 2020 Mengning 8 | * 9 | */ 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | 17 | #include "mypcb.h" 18 | 19 | tPCB task[MAX_TASK_NUM]; 20 | tPCB * my_current_task = NULL; 21 | volatile int my_need_sched = 0; 22 | 23 | void my_process(void); 24 | 25 | 26 | void __init my_start_kernel(void) 27 | { 28 | int pid = 0; 29 | int i; 30 | /* Initialize process 0*/ 31 | task[pid].pid = pid; 32 | task[pid].state = 0;/* -1 unrunnable, 0 runnable, >0 stopped */ 33 | task[pid].task_entry = task[pid].thread.ip = (unsigned long)my_process; 34 | task[pid].thread.sp = (unsigned long)&task[pid].stack[KERNEL_STACK_SIZE-1]; 35 | task[pid].next = &task[pid]; 36 | /*fork more process */ 37 | for(i=1;ipid); 68 | if(my_need_sched == 1) 69 | { 70 | my_need_sched = 0; 71 | my_schedule(); 72 | } 73 | printk(KERN_NOTICE "this is process %d +\n",my_current_task->pid); 74 | } 75 | } 76 | } 77 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Welcome to the mykernel 2.0 2 | 3 | Develop your own OS kernel by reusing Linux infrastructure, based on x86-64/Linux Kernel 5.4.34. 4 | 5 | [mykernel 1.0](https://github.com/mengning/mykernel/tree/cc6f687daaa831a350f3022853825ebe8d78aa2f) based on IA32/Linux Kernel 3.9.4. 6 | 7 | ## Set up mykernel 2.0 in Ubuntu 18.04/20.04 8 | 9 | [Ubuntu22.04版本编译时遇到兼容性问题解决方案](https://github.com/mengning/mykernel/issues/22) 10 | 11 | ``` 12 | wget https://raw.github.com/mengning/mykernel/master/mykernel-2.0_for_linux-5.4.34.patch 13 | sudo apt install axel 14 | axel -n 20 https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.34.tar.xz 15 | xz -d linux-5.4.34.tar.xz 16 | tar -xvf linux-5.4.34.tar 17 | cd linux-5.4.34 18 | patch -p1 < ../mykernel-2.0_for_linux-5.4.34.patch 19 | sudo apt install build-essential libncurses-dev bison flex libssl-dev libelf-dev 20 | make defconfig # Default configuration is based on 'x86_64_defconfig' 21 | # 使用allnoconfig编译出来qemu无法加载启动，不知道为什么？有明白的告诉我，完整编译太慢了，消耗的资源也多。 22 | make -j$(nproc) # 编译的时间比较久哦 23 | sudo apt install qemu # install QEMU 24 | qemu-system-x86_64 -kernel arch/x86/boot/bzImage 25 | ``` 26 | 感谢meilihao 提交了pr [#14](https://github.com/mengning/mykernel/pull/14) ，通过如下方法可以解决allnoconfig编译出来qemu无法加载启动的问题 27 | 28 | ``` 29 | $ make allnoconfig 30 | $ make menuconfig 31 | General setup ---> Configure standard kernel features ---> Enable support for printk ---> yes 32 | 64-bit kernel ---> yes # 如果不需要64bit支持, 这个也可不要 33 | Device Drivers ---> Character devices ---> Enable TTY ---> yes 34 | ``` 35 | 36 | 从qemu窗口中您可以看到my_start_kernel在执行，同时my_timer_handler时钟中断处理程序周期性执行。 37 | 38 | 进入mykernel目录您可以看到qemu窗口输出的内容的代码mymain.c和myinterrupt.c。当前有一个CPU执行C代码的上下文环境，同时具有中断处理程序的上下文环境，我们通过Linux内核代码模拟了一个具有时钟中断和C代码执行环境的硬件平台。 39 | 40 | 您只要在mymain.c基础上继续写进程描述PCB和进程链表管理等代码，在myinterrupt.c的基础上完成进程切换代码，一个可运行的小OS kernel就完成了。start to write your own OS kernel, enjoy it! 41 | 42 | + mykernel-2.0 patch generated by this command: 43 | + diff -Naur linux-5.4.34 linux-5.4.34-mykernel > mykernel-2.0_for_linux-5.3.34.patch 44 | 45 | ## your own OS kernel example code 46 | 47 | * mypcb.h、mymain.c和myinterrupt.c实现了一个简单的时间片轮转调度进程的精简内核，如下为进程上下文切换的关键代码（[视频讲解](https://mp.weixin.qq.com/s/SzpN1BNty5aPDZhNdCO5yA)）: 48 | ``` 49 | printk(KERN_NOTICE ">>>switch %d to %d<<<\n",prev->pid,next->pid); 50 | /* switch to next process */ 51 | asm volatile( 52 | "pushq %%rbp\n\t" /* save rbp of prev */ 53 | "movq %%rsp,%0\n\t" /* save rsp of prev */ 54 | "movq %2,%%rsp\n\t" /* restore rsp of next */ 55 | "movq $1f,%1\n\t" /* save rip of prev */ 56 | "pushq %3\n\t" 57 | "ret\n\t" /* restore rip of next */ 58 | "1:\t" /* next process start here */ 59 | "popq %%rbp\n\t" 60 | : "=m" (prev->thread.sp),"=m" (prev->thread.ip) 61 | : "m" (next->thread.sp),"m" (next->thread.ip) 62 | ); 63 | ``` 64 | 65 | * 这里的进程切换也仅仅是一种参考x86 Linux内核3.18.6的实现，而Linux内核中进程切换的实现经过了复杂的演化，参考[Evolution of the x86 context switch in Linux](https://www.maizure.org/projects/evolution_x86_context_switch_linux/) 66 | 67 | ## Comments 68 | 69 | * mykernel这样一个短小精悍的模拟内核，时常给我提供了看问题的角度和思路。当被庞杂的Linux内核代码弄得一头雾水时，我就去看看mykernel，很多复杂的问题就可以用简单的机制解释。——[pianogirl](http://blog.csdn.net/pianogirl123/article/details/51287024) 70 | 71 | # 采用mykernel的课程和项目 72 | 73 | * [庖丁解牛Linux内核MOOC课程](https://mooc.study.163.com/course/1000072000?_trace_c_p_k2_=12d5497350df49e2a6e3878d1a5aa5ae&share=2&shareId=1000001002#/info) - 国家精品在线开放课程 74 | * [kernel-in-kernel](https://github.com/jserv/kernel-in-kernel) 75 | * [操作系统导论](https://github.com/mengning/linuxkernel) 76 | * [《庖丁解牛Linux内核分析》](https://j.youzan.com/pfzVI9) 77 | 78 | ## Licensing 79 | 80 | under GNU GPL v2, or Contact us 81 | 82 | -------------------------------------------------------------------------------- /mykernel_for_linux3.9.4sc.patch: -------------------------------------------------------------------------------- 1 | diff -Naur linux-3.9.4/arch/x86/kernel/time.c linux-3.9.4.new/arch/x86/kernel/time.c 2 | --- linux-3.9.4/arch/x86/kernel/time.c 2013-05-24 11:45:59.000000000 -0700 3 | +++ linux-3.9.4.new/arch/x86/kernel/time.c 2013-06-25 21:39:34.641299852 -0700 4 | @@ -13,6 +13,7 @@ 5 | #include 6 | #include 7 | #include 8 | +#include 9 | #include 10 | 11 | #include 12 | @@ -57,6 +58,7 @@ 13 | static irqreturn_t timer_interrupt(int irq, void *dev_id) 14 | { 15 | global_clock_event->event_handler(global_clock_event); 16 | + my_timer_handler(); 17 | return IRQ_HANDLED; 18 | } 19 | 20 | @@ -68,6 +70,7 @@ 21 | 22 | void __init setup_default_timer_irq(void) 23 | { 24 | + printk(KERN_NOTICE "timer interrupt setup\n"); 25 | setup_irq(0, &irq0); 26 | } 27 | 28 | diff -Naur linux-3.9.4/include/linux/start_kernel.h linux-3.9.4.new/include/linux/start_kernel.h 29 | --- linux-3.9.4/include/linux/start_kernel.h 2013-05-24 11:45:59.000000000 -0700 30 | +++ linux-3.9.4.new/include/linux/start_kernel.h 2013-06-25 19:18:58.396722448 -0700 31 | @@ -8,5 +8,6 @@ 32 | up something else. */ 33 | 34 | extern asmlinkage void __init start_kernel(void); 35 | +extern void __init my_start_kernel(void); 36 | 37 | #endif /* _LINUX_START_KERNEL_H */ 38 | diff -Naur linux-3.9.4/include/linux/timer.h linux-3.9.4.new/include/linux/timer.h 39 | --- linux-3.9.4/include/linux/timer.h 2013-05-24 11:45:59.000000000 -0700 40 | +++ linux-3.9.4.new/include/linux/timer.h 2013-06-25 21:28:37.609026644 -0700 41 | @@ -251,6 +251,8 @@ 42 | 43 | extern void init_timers(void); 44 | extern void run_local_timers(void); 45 | +extern void my_timer_handler(void); 46 | + 47 | struct hrtimer; 48 | extern enum hrtimer_restart it_real_fn(struct hrtimer *); 49 | 50 | diff -Naur linux-3.9.4/init/main.c linux-3.9.4.new/init/main.c 51 | --- linux-3.9.4/init/main.c 2013-05-24 11:45:59.000000000 -0700 52 | +++ linux-3.9.4.new/init/main.c 2013-06-25 20:16:17.452763103 -0700 53 | @@ -574,7 +574,6 @@ 54 | console_init(); 55 | if (panic_later) 56 | panic(panic_later, panic_param); 57 | - 58 | lockdep_info(); 59 | 60 | /* 61 | @@ -641,6 +640,7 @@ 62 | 63 | ftrace_init(); 64 | 65 | + my_start_kernel(); 66 | /* Do the rest non-__init'ed, we're now alive */ 67 | rest_init(); 68 | } 69 | diff -Naur linux-3.9.4/Makefile linux-3.9.4.new/Makefile 70 | --- linux-3.9.4/Makefile 2013-05-24 11:45:59.000000000 -0700 71 | +++ linux-3.9.4.new/Makefile 2013-06-25 19:16:00.177364039 -0700 72 | @@ -733,7 +733,7 @@ 73 | 74 | 75 | ifeq ($(KBUILD_EXTMOD),) 76 | -core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 77 | +core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ mykernel/ 78 | 79 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 80 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 81 | diff -Naur linux-3.9.4/mykernel/Makefile linux-3.9.4.new/mykernel/Makefile 82 | --- linux-3.9.4/mykernel/Makefile 1969-12-31 16:00:00.000000000 -0800 83 | +++ linux-3.9.4.new/mykernel/Makefile 2013-06-25 21:40:24.174030881 -0700 84 | @@ -0,0 +1,6 @@ 85 | +# 86 | +# Makefile for the linux mykernel. 87 | +# 88 | + 89 | +obj-y = mymain.o myinterrupt.o 90 | + 91 | diff -Naur linux-3.9.4/mykernel/myinterrupt.c linux-3.9.4.new/mykernel/myinterrupt.c 92 | --- linux-3.9.4/mykernel/myinterrupt.c 1969-12-31 16:00:00.000000000 -0800 93 | +++ linux-3.9.4.new/mykernel/myinterrupt.c 2013-06-25 21:45:38.408915841 -0700 94 | @@ -0,0 +1,47 @@ 95 | +/* 96 | + * linux/mykernel/myinterrupt.c 97 | + * 98 | + * Kernel internal my_timer_handler 99 | + * 100 | + * Copyright (C) 2013 Mengning 101 | + * 102 | + */ 103 | +#include 104 | +#include 105 | +#include 106 | +#include 107 | +#include 108 | +#include 109 | +#include 110 | +#include 111 | +#include 112 | +#include 113 | +#include 114 | +#include 115 | +#include 116 | +#include 117 | +#include 118 | +#include 119 | +#include 120 | +#include 121 | +#include 122 | +#include 123 | +#include 124 | +#include 125 | + 126 | +#include 127 | +#include 128 | +#include 129 | +#include 130 | +#include 131 | + 132 | +#define CREATE_TRACE_POINTS 133 | +#include 134 | + 135 | +/* 136 | + * Called by timer interrupt. 137 | + */ 138 | +void my_timer_handler(void) 139 | +{ 140 | + printk(KERN_NOTICE "\n>>>>>>>>>>>>>>>>>my_timer_handler here<<<<<<<<<<<<<<<<<<\n\n"); 141 | +} 142 | diff -Naur linux-3.9.4/mykernel/mymain.c linux-3.9.4.new/mykernel/mymain.c 143 | --- linux-3.9.4/mykernel/mymain.c 1969-12-31 16:00:00.000000000 -0800 144 | +++ linux-3.9.4.new/mykernel/mymain.c 2013-06-25 21:44:59.489317439 -0700 145 | @@ -0,0 +1,93 @@ 146 | +/* 147 | + * linux/mykernel/mymain.c 148 | + * 149 | + * Kernel internal my_start_kernel 150 | + * 151 | + * Copyright (C) 2013 Mengning 152 | + * 153 | + */ 154 | +#include 155 | +#include 156 | +#include 157 | +#include 158 | +#include 159 | +#include 160 | +#include 161 | +#include 162 | +#include 163 | +#include 164 | +#include 165 | +#include 166 | +#include 167 | +#include 168 | +#include 169 | +#include 170 | +#include 171 | +#include 172 | +#include 173 | +#include 174 | +#include 175 | +#include 176 | +#include 177 | +#include 178 | +#include 179 | +#include 180 | +#include 181 | +#include 182 | +#include 183 | +#include 184 | +#include 185 | +#include 186 | +#include 187 | +#include 188 | +#include 189 | +#include 190 | +#include 191 | +#include 192 | +#include 193 | +#include 194 | +#include 195 | +#include 196 | +#include 197 | +#include 198 | +#include 199 | +#include 200 | +#include 201 | +#include 202 | +#include 203 | +#include 204 | +#include 205 | +#include 206 | +#include 207 | +#include 208 | +#include 209 | +#include 210 | +#include 211 | +#include 212 | +#include 213 | +#include 214 | +#include 215 | +#include 216 | +#include 217 | + 218 | +#include 219 | +#include 220 | +#include 221 | +#include 222 | +#include 223 | + 224 | +#ifdef CONFIG_X86_LOCAL_APIC 225 | +#include 226 | +#endif 227 | + 228 | +void __init my_start_kernel(void) 229 | +{ 230 | + int i = 0; 231 | + while(1) 232 | + { 233 | + i++; 234 | + if(i%100000 == 0) 235 | + printk(KERN_NOTICE "my_start_kernel here %d \n",i); 236 | + 237 | + } 238 | +} 239 | diff -Naur linux-3.9.4/mykernel/README.md linux-3.9.4.new/mykernel/README.md 240 | --- linux-3.9.4/mykernel/README.md 1969-12-31 16:00:00.000000000 -0800 241 | +++ linux-3.9.4.new/mykernel/README.md 2013-06-25 21:52:52.467808733 -0700 242 | @@ -0,0 +1,3 @@ 243 | +mykernel 244 | +========== 245 | +It is a platform to write your own OS kernel,its based on Linux Kernel 3.9.4 source code. 246 | -------------------------------------------------------------------------------- /mykernel-2.0_for_linux-5.4.34.patch: -------------------------------------------------------------------------------- 1 | diff -Naur linux-5.4.34/arch/x86/kernel/time.c linux-5.4.34-mykernel/arch/x86/kernel/time.c 2 | --- linux-5.4.34/arch/x86/kernel/time.c 2020-04-21 15:05:05.000000000 +0800 3 | +++ linux-5.4.34-mykernel/arch/x86/kernel/time.c 2020-04-25 21:58:16.436717811 +0800 4 | @@ -16,6 +16,7 @@ 5 | #include 6 | #include 7 | #include 8 | +#include 9 | #include 10 | 11 | #include 12 | @@ -59,6 +60,7 @@ 13 | static irqreturn_t timer_interrupt(int irq, void *dev_id) 14 | { 15 | global_clock_event->event_handler(global_clock_event); 16 | + my_timer_handler(); 17 | return IRQ_HANDLED; 18 | } 19 | 20 | diff -Naur linux-5.4.34/include/linux/start_kernel.h linux-5.4.34-mykernel/include/linux/start_kernel.h 21 | --- linux-5.4.34/include/linux/start_kernel.h 2020-04-21 15:05:05.000000000 +0800 22 | +++ linux-5.4.34-mykernel/include/linux/start_kernel.h 2020-04-25 22:00:17.304717811 +0800 23 | @@ -9,6 +9,7 @@ 24 | up something else. */ 25 | 26 | extern asmlinkage void __init start_kernel(void); 27 | +extern void __init my_start_kernel(void); 28 | extern void __init arch_call_rest_init(void); 29 | extern void __ref rest_init(void); 30 | 31 | diff -Naur linux-5.4.34/include/linux/timer.h linux-5.4.34-mykernel/include/linux/timer.h 32 | --- linux-5.4.34/include/linux/timer.h 2020-04-21 15:05:05.000000000 +0800 33 | +++ linux-5.4.34-mykernel/include/linux/timer.h 2020-04-25 21:56:45.064717811 +0800 34 | @@ -193,6 +193,8 @@ 35 | 36 | extern void init_timers(void); 37 | extern void run_local_timers(void); 38 | +extern void my_timer_handler(void); 39 | + 40 | struct hrtimer; 41 | extern enum hrtimer_restart it_real_fn(struct hrtimer *); 42 | 43 | diff -Naur linux-5.4.34/init/main.c linux-5.4.34-mykernel/init/main.c 44 | --- linux-5.4.34/init/main.c 2020-04-21 15:05:05.000000000 +0800 45 | +++ linux-5.4.34-mykernel/init/main.c 2020-04-25 22:01:13.476717811 +0800 46 | @@ -781,6 +781,7 @@ 47 | arch_post_acpi_subsys_init(); 48 | sfi_init_late(); 49 | 50 | + my_start_kernel(); 51 | /* Do the rest non-__init'ed, we're now alive */ 52 | arch_call_rest_init(); 53 | } 54 | diff -Naur linux-5.4.34/Makefile linux-5.4.34-mykernel/Makefile 55 | --- linux-5.4.34/Makefile 2020-04-21 15:05:05.000000000 +0800 56 | +++ linux-5.4.34-mykernel/Makefile 2020-04-25 22:02:47.144717811 +0800 57 | @@ -1012,7 +1012,7 @@ 58 | export MODORDER := $(extmod-prefix)modules.order 59 | 60 | ifeq ($(KBUILD_EXTMOD),) 61 | -core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 62 | +core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ mykernel/ 63 | 64 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 65 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 66 | diff -Naur linux-5.4.34/mykernel/Makefile linux-5.4.34-mykernel/mykernel/Makefile 67 | --- linux-5.4.34/mykernel/Makefile 1970-01-01 08:00:00.000000000 +0800 68 | +++ linux-5.4.34-mykernel/mykernel/Makefile 2020-04-25 17:14:13.537908421 +0800 69 | @@ -0,0 +1,6 @@ 70 | +# 71 | +# Makefile for the linux mykernel. 72 | +# 73 | + 74 | +obj-y = mymain.o myinterrupt.o 75 | + 76 | diff -Naur linux-5.4.34/mykernel/myinterrupt.c linux-5.4.34-mykernel/mykernel/myinterrupt.c 77 | --- linux-5.4.34/mykernel/myinterrupt.c 1970-01-01 08:00:00.000000000 +0800 78 | +++ linux-5.4.34-mykernel/mykernel/myinterrupt.c 2020-04-25 19:09:50.612555999 +0800 79 | @@ -0,0 +1,44 @@ 80 | +/* 81 | + * linux/mykernel/myinterrupt.c 82 | + * 83 | + * Kernel internal my_timer_handler 84 | + * 85 | + * Copyright (C) 2013 Mengning 86 | + * 87 | + */ 88 | +#include 89 | +#include 90 | +#include 91 | +#include 92 | +#include 93 | +#include 94 | +#include 95 | +#include 96 | +#include 97 | +#include 98 | +#include 99 | +#include 100 | +#include 101 | +#include 102 | +#include 103 | +#include 104 | +#include 105 | +#include 106 | +#include 107 | +#include 108 | +#include 109 | +#include 110 | + 111 | +#include 112 | +#include 113 | +#include 114 | +#include 115 | +#include 116 | + 117 | +/* 118 | + * Called by timer interrupt. 119 | + */ 120 | +void my_timer_handler(void) 121 | +{ 122 | + pr_notice("\n>>>>>>>>>>>>>>>>>my_timer_handler here<<<<<<<<<<<<<<<<<<\n\n"); 123 | +} 124 | diff -Naur linux-5.4.34/mykernel/mymain.c linux-5.4.34-mykernel/mykernel/mymain.c 125 | --- linux-5.4.34/mykernel/mymain.c 1970-01-01 08:00:00.000000000 +0800 126 | +++ linux-5.4.34-mykernel/mykernel/mymain.c 2020-04-25 19:10:27.635058000 +0800 127 | @@ -0,0 +1,91 @@ 128 | +/* 129 | + * linux/mykernel/mymain.c 130 | + * 131 | + * Kernel internal my_start_kernel 132 | + * 133 | + * Copyright (C) 2013 Mengning 134 | + * 135 | + */ 136 | +#include 137 | +#include 138 | +#include 139 | +#include 140 | +#include 141 | +#include 142 | +#include 143 | +#include 144 | +#include 145 | +#include 146 | +#include 147 | +#include 148 | +#include 149 | +#include 150 | +#include 151 | +#include 152 | +#include 153 | +#include 154 | +#include 155 | +#include 156 | +#include 157 | +#include 158 | +#include 159 | +#include 160 | +#include 161 | +#include 162 | +#include 163 | +#include 164 | +#include 165 | +#include 166 | +#include 167 | +#include 168 | +#include 169 | +#include 170 | +#include 171 | +#include 172 | +#include 173 | +#include 174 | +#include 175 | +#include 176 | +#include 177 | +#include 178 | +#include 179 | +#include 180 | +#include 181 | +#include 182 | +#include 183 | +#include 184 | +#include 185 | +#include 186 | +#include 187 | +#include 188 | +#include 189 | +#include 190 | +#include 191 | +#include 192 | +#include 193 | +#include 194 | +#include 195 | +#include 196 | + 197 | +#include 198 | +#include 199 | +#include 200 | +#include 201 | +#include 202 | + 203 | +#ifdef CONFIG_X86_LOCAL_APIC 204 | +#include 205 | +#endif 206 | + 207 | + 208 | +void __init my_start_kernel(void) 209 | +{ 210 | + int i = 0; 211 | + while(1) 212 | + { 213 | + i++; 214 | + if(i%100000 == 0) 215 | + pr_notice("my_start_kernel here %d \n",i); 216 | + 217 | + } 218 | +} 219 | diff -Naur linux-5.4.34/mykernel/README.md linux-5.4.34-mykernel/mykernel/README.md 220 | --- linux-5.4.34/mykernel/README.md 1970-01-01 08:00:00.000000000 +0800 221 | +++ linux-5.4.34-mykernel/mykernel/README.md 2020-04-25 22:18:46.512717811 +0800 222 | @@ -0,0 +1,21 @@ 223 | +mykernel 2.0 224 | +========== 225 | +Develop your own OS kernel by reusing Linux infrastructure, based on x86-64/Linux Kernel 5.4.34. 226 | + 227 | +## Set up mykernel 2.0 in Ubuntu 18.04 228 | + 229 | +``` 230 | +sudo apt install build-essential 231 | +sudo apt install axel 232 | +sudo apt install qemu # install QEMU 233 | +sudo apt install libncurses-dev bison flex libssl-dev libelf-dev 234 | +wget https://raw.github.com/mengning/mykernel/master/mykernel-2.0_for_linux-5.3.34.patch 235 | +axel -n 20 https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.34.tar.xz 236 | +xz -d linux-5.4.34.tar.xz 237 | +tar -xvf linux-5.4.34.tar 238 | +cd linux-5.4.34 239 | +patch -p1 < ../mykernel-2.0_for_linux-5.3.34.patch 240 | +make defconfig # Default configuration is based on 'x86_64_defconfig' 241 | +make -j$(nproc) 242 | +qemu-system-x86_64 -kernel arch/x86/boot/bzImage 243 | +``` 244 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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