From 56a97ff6398c03de22dabd7b93f54b1292f66b97 Mon Sep 17 00:00:00 2001 From: Amlal El Mahrouss Date: Tue, 15 Apr 2025 16:54:06 +0200 Subject: dev, user: user.sys refactors. Signed-off-by: Amlal El Mahrouss --- dev/user/src/SystemCalls+IO.asm | 52 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 dev/user/src/SystemCalls+IO.asm (limited to 'dev/user/src/SystemCalls+IO.asm') diff --git a/dev/user/src/SystemCalls+IO.asm b/dev/user/src/SystemCalls+IO.asm new file mode 100644 index 00000000..58ea79e7 --- /dev/null +++ b/dev/user/src/SystemCalls+IO.asm @@ -0,0 +1,52 @@ +;; /* +;; * ======================================================== +;; * +;; * libsci +;; * Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved. +;; * +;; * ======================================================== +;; */ + +[bits 64] + +;; @brief Syscall dispatch, also taking note the Microsoft's calling convention to translate it to NeKernel's ABI. + +section .text + +global sci_syscall_arg_1 +global sci_syscall_arg_2 +global sci_syscall_arg_3 +global sci_syscall_arg_4 + +sci_syscall_arg_1: + mov r8, rcx + syscall + ret + +sci_syscall_arg_2: + mov r8, rcx + mov r9, rdx + syscall + ret + +sci_syscall_arg_3: + mov rbx, r8 + + mov r8, rcx + mov r9, rdx + mov r10, rbx + + syscall + ret + +sci_syscall_arg_4: + mov rbx, r8 + mov rax, r9 + + mov r8, rcx + mov r9, rdx + mov r10, rbx + mov r11, rax + + syscall + ret -- cgit v1.2.3