From e80a8927c58fb78a6d31cc809daa1cdb8fb371f6 Mon Sep 17 00:00:00 2001
From: Able <abl3theabove@gmail.com>
Date: Thu, 10 Feb 2022 21:34:02 -0600
Subject: [PATCH] libwasm

---
 .gitignore        |  2 ++
 Cargo.toml        |  8 ++++++
 src/lib.rs        |  7 +++++
 src/logger/mod.rs | 67 +++++++++++++++++++++++++++++++++++++++++++++++
 src/syscalls.rs   |  4 +++
 5 files changed, 88 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs
 create mode 100644 src/logger/mod.rs
 create mode 100644 src/syscalls.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..96ef6c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..8cab3f3
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "libwasm"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..ca32d84
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,7 @@
+#[macro_use]
+pub mod logger;
+pub mod syscalls;
+
+pub use core::*;
+
+use logger::LogLevel;
diff --git a/src/logger/mod.rs b/src/logger/mod.rs
new file mode 100644
index 0000000..fe4aca1
--- /dev/null
+++ b/src/logger/mod.rs
@@ -0,0 +1,67 @@
+#![allow(unused_macros)]
+
+#[repr(C)]
+pub enum LogLevel {
+    Error,
+    Warn,
+    Info,
+    Debug,
+    Trace,
+}
+
+extern "C" {
+    pub fn host_log(log_level: LogLevel, log_message: *const u8, log_message_len: u32);
+}
+
+macro_rules! log {
+    ($a:expr, $b:expr) => {{
+        let log_level: LogLevel = $a;
+        let log_message: &[u8] = $b;
+
+        let pointer = log_message.as_ptr();
+
+        unsafe {
+            $crate::logger::host_log(log_level, pointer, log_message.len() as u32);
+        }
+    }};
+}
+
+macro_rules! debug {
+    ($a:expr) => {
+        use crate::logger::{LogLevel::*, *};
+
+        log!(Debug, $a);
+    };
+}
+
+macro_rules! error {
+    ($a:expr) => {
+        use crate::logger::{LogLevel::*, *};
+
+        log!(Error, $a);
+    };
+}
+
+macro_rules! trace {
+    ($a:expr) => {
+        use crate::logger::*;
+
+        log!(Trace, $a);
+    };
+}
+
+macro_rules! warn {
+    ($a:expr) => {
+        use crate::logger::{LogLevel::*, *};
+
+        log!(Warn, $a);
+    };
+}
+
+macro_rules! info {
+    ($a:expr) => {
+        use crate::logger::{LogLevel::*, *};
+
+        log!(Info, $a);
+    };
+}
diff --git a/src/syscalls.rs b/src/syscalls.rs
new file mode 100644
index 0000000..376456f
--- /dev/null
+++ b/src/syscalls.rs
@@ -0,0 +1,4 @@
+/// All system calls are defined here.
+extern "C" {
+    pub fn add(a: u32, b: u32) -> u32;
+}