Luna/kernel/src/main.asm

global _main
extern _start

_main:
    xor rbp, rbp
    call _start
    cli
.hang:
    hlt
    jmp .hang

global idle_task_function
idle_task_function:
    sti
.idle:
    hlt
    jmp .idle

global asm_enable_sse
asm_enable_sse:
    mov rax, cr0
    and ax, 0xFFFB
    or ax, 0x2
    mov cr0, rax
    mov rax, cr4
    or ax, 3 << 9
    mov cr4, rax
    ret
Start the call stack with a null RBP before calling _start 2022-09-18 15:03:29 +00:00			`global _main`
			`extern _start`

			`_main:`
			`xor rbp, rbp`
User mode (with a few syscalls) IT ACTUALLY WORKS NOW. Why wasn't it working? Oh, because I was not setting already present page tables's permissions to user mode. Just a little bug. THAT I SPENT DAYS TRYING TO FIND Anyways, it works now. Such a relief... 2022-09-25 18:35:05 +00:00			`call _start`
Remove _userspace and move the idle task to assembly 2022-10-01 10:16:30 +00:00			`cli`
			`.hang:`
			`hlt`
			`jmp .hang`
User mode (with a few syscalls) IT ACTUALLY WORKS NOW. Why wasn't it working? Oh, because I was not setting already present page tables's permissions to user mode. Just a little bug. THAT I SPENT DAYS TRYING TO FIND Anyways, it works now. Such a relief... 2022-09-25 18:35:05 +00:00
Remove _userspace and move the idle task to assembly 2022-10-01 10:16:30 +00:00			`global idle_task_function`
			`idle_task_function:`
			`sti`
			`.idle:`
			`hlt`
Kernel: Add SSE support (enable SSE on boot and save context (user tasks only) on task switch) 2022-10-02 16:53:54 +00:00			`jmp .idle`

			`global asm_enable_sse`
			`asm_enable_sse:`
			`mov rax, cr0`
			`and ax, 0xFFFB`
			`or ax, 0x2`
			`mov cr0, rax`
			`mov rax, cr4`
			`or ax, 3 << 9`
			`mov cr4, rax`
			`ret`