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RM: Old userspace/syscall test assembly files

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boreddevnl 2026-04-17 14:13:44 +02:00
parent 89140d7546
commit fb00bbac2b
2 changed files with 0 additions and 44 deletions
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19
src/arch/test_syscall.asm
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; Copyright (c) 2023-2026 Chris (boreddevnl)
; This software is released under the GNU General Public License v3.0. See LICENSE file for details.
; This header needs to maintain in any file it is present in, as per the GPL license terms.
global test_syscall
section .text
test_syscall:
; syscall number in RDI
mov rdi, 1
; string pointer in RSI
lea rsi, [rel test_msg]
; The SYSCALL instruction
syscall
ret
section .rodata
test_msg: db "Hello from Syscall!", 10, 0

25
src/arch/user_test.asm
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; Copyright (c) 2023-2026 Chris (boreddevnl)
; This software is released under the GNU General Public License v3.0. See LICENSE file for details.
; This header needs to maintain in any file it is present in, as per the GPL license terms.
global user_test_function
section .text
user_test_function:
; Syscall convention
.loop:
; Invoke SYS_WRITE (Syscall #1)
mov rdi, 1 ; arg1: fd = 1 (stdout)
lea rsi, [rel msg] ; arg2: buffer (RIP-relative)
mov rdx, 15 ; arg3: length
mov eax, 1 ; syscall_num = 1 (SYS_WRITE)
syscall
; Some delay loop
mov rcx, 100000000
.delay:
dec rcx
jnz .delay
jmp .loop
msg: db "Hello syscall!", 10