34 lines
1.3 KiB
NASM
34 lines
1.3 KiB
NASM
section .data
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file_path db '/ebalo/huy.txt', 0 ; Specific file path, null-terminated
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message db 'Hello, World from KatauOS!', 10, 0 ; Message to write, with newline
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message_len equ $ - message - 1 ; Length of message (14 bytes, excluding null)
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section .text
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global _start
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_start:
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; Open the file
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mov eax, 5 ; System call number for sys_open
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mov ebx, file_path ; Pointer to file path
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mov ecx, 65 ; Flags: O_WRONLY (1) | O_CREAT (64)
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mov edx, 0x1A4 ; Mode: 0644 (rw-r--r--)
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int 0x80 ; Invoke system call
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mov edi, eax ; Save file descriptor in edi
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; Write to the file
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mov eax, 4 ; System call number for sys_write
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mov ebx, edi ; File descriptor
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mov ecx, message ; Pointer to message
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mov edx, message_len ; Number of bytes to write
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int 0x80 ; Invoke system call
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; Close the file
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mov eax, 6 ; System call number for sys_close
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mov ebx, edi ; File descriptor
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int 0x80 ; Invoke system call
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; Exit the program
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mov eax, 1 ; System call number for sys_exit
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xor ebx, ebx ; Return status 0
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int 0x80 ; Invoke system call
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