From c4261908c495e2df9bae2dc212ef4526ead0b581 Mon Sep 17 00:00:00 2001
From: corigan01 <corigan01@gmail.com>
Date: Thu, 6 Feb 2025 21:42:22 -0600
Subject: [PATCH] Sys: Add a system lib for handing syscalls directly

---
 Cargo.toml             |   4 +-
 user/libsys/Cargo.toml |   9 ++++
 user/libsys/src/lib.rs | 120 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+), 1 deletion(-)
 create mode 100644 user/libsys/Cargo.toml
 create mode 100644 user/libsys/src/lib.rs

diff --git a/Cargo.toml b/Cargo.toml
index d4dcaa4b..b1b6eb47 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,8 @@ members = [
   "crates/portal-macro",
   "crates/portal",
   "portals/hello-portal",
-  "portals/quantum-portal"
+  "portals/quantum-portal",
+  "user/libsys"
 ]
 
 default-members = ["meta"]
@@ -64,6 +65,7 @@ portal = { path = "crates/portal" }
 portal-macro = { path = "crates/portal-macro" }
 hello-portal = { path = "portals/hello-portal" }
 quantum-portal = { path = "portals/quantum-portal" }
+libsys = { path = "user/libsys" }
 
 [profile.stage-bootsector]
 inherits = "release"
diff --git a/user/libsys/Cargo.toml b/user/libsys/Cargo.toml
new file mode 100644
index 00000000..ab059f1c
--- /dev/null
+++ b/user/libsys/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "libsys"
+edition = "2024"
+version.workspace = true
+authors.workspace = true
+description.workspace = true
+documentation.workspace = true
+
+[dependencies]
diff --git a/user/libsys/src/lib.rs b/user/libsys/src/lib.rs
new file mode 100644
index 00000000..57fb9d15
--- /dev/null
+++ b/user/libsys/src/lib.rs
@@ -0,0 +1,120 @@
+/*
+  ____                 __               __   _ __
+ / __ \__ _____ ____  / /___ ____ _    / /  (_) /
+/ /_/ / // / _ `/ _ \/ __/ // /  ' \  / /__/ / _ \
+\___\_\_,_/\_,_/_//_/\__/\_,_/_/_/_/ /____/_/_.__/
+    Part of the Quantum OS Project
+
+Copyright 2025 Gavin Kellam
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+///
+/// Preform a raw system call to QuantumOS.
+///
+/// This is a wrapper around an assembly block that preforms a system call.
+#[macro_export]
+macro_rules! raw_syscall {
+    (__priv_custom_asm, $($tt:tt)*) => {
+        ::core::arch::asm!(
+            // "int 0x80",
+            "syscall",
+            $($tt)*
+            clobber_abi("system")
+        );
+    };
+    ($syscall_number:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            out("rcx") _,
+            out("r11") _,
+        );
+
+        syscall_return
+    }};
+    ($syscall_number:expr, $arg1:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            in("rdi") $arg1,
+            out("rcx") _,
+            out("r11") _,
+        );
+
+        syscall_return
+    }};
+    ($syscall_number:expr, $arg1:expr, $arg2:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            in("rdi") $arg1,
+            in("rsi") $arg2,
+            out("rcx") _,
+            out("r11") _,
+        );
+
+        syscall_return
+    }};
+    ($syscall_number:expr, $arg1:expr, $arg2:expr, $arg3:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            in("rdi") $arg1,
+            in("rsi") $arg2,
+            in("rdx") $arg3,
+            out("rcx") _,
+            out("r11") _,
+        );
+
+        syscall_return
+    }};
+    ($syscall_number:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            in("rdi") $arg1,
+            in("rsi") $arg2,
+            in("rdx") $arg3,
+            inout("rcx") $arg4 => _,
+            out("r11") _,
+        );
+
+        syscall_return
+    }};
+    ($syscall_number:expr, $arg1:expr, $arg2:expr, $arg3:expr, $arg4:expr, $arg5:expr) => {{
+        let mut syscall_return: u64 = { $syscall_number } as u64;
+
+        $crate::raw_syscall!(__priv_custom_asm,
+            inlateout("rax") syscall_return,
+            in("rdi") $arg1,
+            in("rsi") $arg2,
+            in("rdx") $arg3,
+            inout("rcx") $arg4 => _,
+            in("r8") $arg5,
+            out("r11") _,
+        );
+
+        syscall_return
+
+    }};
+}