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22 lines
449 B
NASM
22 lines
449 B
NASM
global user_test_function
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section .text
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user_test_function:
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; Syscall convention
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.loop:
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; Invoke SYS_WRITE (Syscall #1)
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mov rdi, 1 ; arg1: fd = 1 (stdout)
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lea rsi, [rel msg] ; arg2: buffer (RIP-relative)
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mov rdx, 15 ; arg3: length
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mov eax, 1 ; syscall_num = 1 (SYS_WRITE)
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syscall
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; Some delay loop
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mov rcx, 100000000
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.delay:
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dec rcx
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jnz .delay
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jmp .loop
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msg: db "Hello syscall!", 10
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