sys: Refactor GDT initialization, enhance syscall handling, and improve user mode entry

Finally we got usermode working again, It took awhile but we got it done. A few things we did in this commit:

- Simplified GDT entry initialization in gdt.c for kernel and user segments.
- Fixed TSS structure for task switching.
- Implemented cr2 handling in a page fault.
- Enhanced user stack setup in usermode.c to return the correct RSP.
- Improved syscall implementation in syscall.c, including new syscall numbers.
- Updated syscall entry to correctly handle context switching and argument passing.
- Refactored init.c to demonstrate file operations using syscalls.
- Added new syscalls for file operations in syscalls.h.
- Modified VFS to handle leading slashes in paths correctly.

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

This commit is contained in:

kaguya

2026-04-26 02:06:28 -04:00

parent 3b6e68bc16

commit e6e8b1209b

19 changed files with 263 additions and 266 deletions

									
										user/crt0.S
									
		+2
		-7
	
												View File
												
				@@ -1,12 +1,7 @@

				.section .text

				.global _start

				.global main

				_start:

				    mov $1, %rax

				    mov $'H', %rdi

				    syscall

				    mov $1, %rax

				    mov $'i', %rdi

				    syscall

				    call main

				1:  jmp 1b