40 lines
1.4 KiB
NASM
40 lines
1.4 KiB
NASM
sction .data
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prompt db 'Please enter your name: ', 0 ; Null-terminated prompt message
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promptLen equ $ - prompt ; Length of the prompt message
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buffer db 128 dup(0) ; Buffer for the input
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bufferLen equ 128 ; Maximum buffer length
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section .bss
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name resb 128 ; Reserve buffer for name
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section .text
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global _start
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_start:
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; Print prompt
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mov eax, 4 ; sys_write syscall
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mov ebx, 1 ; File descriptor 1 - stdout
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mov ecx, prompt ; Pointer to the message to print
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mov edx, promptLen ; Message length
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int 0x80 ; Call the kernel
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; Read input
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mov eax, 3 ; sys_read syscall
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mov ebx, 0 ; File descriptor 0 - stdin
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mov ecx, buffer ; Pointer to the input buffer
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mov edx, bufferLen ; Maximum number of bytes to read
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int 0x80 ; Call the kernel
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; Print greeting
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mov eax, 4 ; sys_write syscall
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mov ebx, 1 ; File descriptor 1 - stdout
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mov ecx, buffer ; Pointer to the buffer to print
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; Use the number of bytes read as the length to write
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int 0x80 ; Call the kernel
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; Exit program
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mov eax, 1 ; sys_exit syscall
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xor ebx, ebx ; Exit code 0
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int 0x80 ; Call the kernel
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