rustos

Experimental OS base on

• blog_os
• xfoxfu/rust_xos
• arrayJY/os
• rcore-os/rCore

Goal: Get into the user space and run the syscall

Learn in this project:

• Kernel structure
• Memory layout
• Interrupt and Trap
• Context and context switch
• Kernel and User space
• Framebuffer rendering
• Syscall

User shell

Date: 2022-10-30

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Install

1. install toolchain

./init.sh

2. build user programe

cd user
make

3. build and run kernel

cd os
cargo clean && cargo krun

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TODO LIST && Known BUG:

1. • Convert TSS table into implementation with memory allocator
2. • Fix render overflow
3. • Make textrenderer support cursor
4. • Package TextWriter as editor and console
     • Document it!
     • Editor
     • Console
     • Support Del?
5. • Setup kernel process
6. • print and println not work, need to check framebuffer and textwritter
7. • clean warning

Note.

1. Leave the Qemu: ctrl+a x (-serial mon:stdio)
2. keyboard interrupt only work on graphic mode currently

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Future works

• TextWriter: Support console like input
• Make cargo ktest work
• Implement APIC (current use 8259 PIC)
• Learn E820 (memory controller?)
• Waiting for new version of osdev/bootloader and rewrite

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ChangeLog

[2022-10-30]

1. BUGFIX: Context switch will be arbitrary crushed, due to idt overflow

Add a guard stack when step up tss table

2. BUGFIX -- STDIN: children process framebuffer render not work

Add framebuffer memory_set copy into memory.page.mod.kernel_mapped_new_page_table

3. BUGFIX: framebuffer writer will crash at last byte

Fix cursor render

4. BUGFIX: Print key typing in framebuffer
5. MODIFY: user_shell improve

[2022-10-29]

1. Implement process and context switch
2. BUG: STDIN

[2022-10-27]

1. Error: syscall jmp to 0x0H in user mode

[2022-09-28]

1. enter user mode
2. syscall/sysretq

[2022-09-26]

1. Setup syscall software interrupt
2. Learn on ext2 filesystem

[2022-08-31]

1. Finished async implement

[2022-08-25]

1. Finished keyboard interrupt
2. Update TextEditor: Support cursor, Bugfix

[2022-08-24]

1. Solve ireqt double fault exception

[2022-08-23]

1. Setup interrupt handler: breakpoint, doubl_fault

[2022-08-22]

1. Modulize unittest, qemu, panic handler
2. Fix ktest error: rust-lang/cargo#7359

[2022-08-21]

1. Change module name: render -> renderer
2. Make document for renderer
3. Append features: change fore/background color for TextWriter

[2022-08-20]

1. Due to make the screen output interface consistent on both bios and uefi, VGA_Buffer no longer to use.
2. Package the screen print interface from bootloader logger as library/render.

[2022-08-19]

1. Initialization this project.
2. bootloader Config setting: https://docs.rs/bootloader/latest/bootloader/struct.Config.html#structfield.kernel_stack_size