kaguya
e6e8b1209b
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>
27 lines
370 B
ArmAsm
27 lines
370 B
ArmAsm
.intel_syntax noprefix
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.global x86_64_GDT_Load
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.extern gdt_pointer
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.global gdt_reload
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gdt_reload:
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lgdt [rip + gdt_pointer]
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push 0x08
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lea rax, [rip + .flush]
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push rax
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lretq
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.flush:
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mov ax, 0x10
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax
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ret
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.global tss_reload
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tss_reload:
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mov ax, 0x2B
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ltr ax
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ret |