initial commit

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

12 files changed, 590 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..4a3e0e4
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,48 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "equivalent"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+
+[[package]]
+name = "hashbrown"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
+
+[[package]]
+name = "indexmap"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
+[[package]]
+name = "semver"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
+
+[[package]]
+name = "wasmcore"
+version = "0.1.0"
+dependencies = [
+ "wasmparser",
+]
+
+[[package]]
+name = "wasmparser"
+version = "0.118.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebbb91574de0011ded32b14db12777e7dd5e9ea2f9d7317a1ab51a9495c75924"
+dependencies = [
+ "indexmap",
+ "semver",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0cfbbe1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+members = [
+    "crates/core",
+]
+
+resolver = "2"
\ No newline at end of file
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..a7e77cb
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,176 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
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+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
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+   "Object" form shall mean any form resulting from mechanical
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+   "Work" shall mean the work of authorship, whether in Source or
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+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
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+   of this License, Derivative Works shall not include works that remain
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+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
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+4. Redistribution. You may reproduce and distribute copies of the
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+   (a) You must give any other recipients of the Work or
+       Derivative Works a copy of this License; and
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+       within a display generated by the Derivative Works, if and
+       wherever such third-party notices normally appear. The contents
+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
+       that such additional attribution notices cannot be construed
+       as modifying the License.
+
+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
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+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
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+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
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+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
\ No newline at end of file
diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..468cd79
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,23 @@
+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.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..aca28d6
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+# TinyWasm
+
+# License
+
+Licensed under either of [Apache License, Version 2.0](./LICENSE-APACHE) or [MIT license](./LICENSE-MIT) at your option.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in OKV by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. 
\ No newline at end of file
diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
new file mode 100644
index 0000000..e8c52b9
--- /dev/null
+++ b/crates/core/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name="wasmcore"
+version="0.1.0"
+edition="2021"
+
+[lib]
+name="wasmcore"
+path="src/lib.rs"
+
+[[bin]]
+name="wasmcore"
+path="src/bin.rs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+wasmparser={version="0.118.0", default-features=false}
+
+[features]
+default=["std"]
+std=[]
diff --git a/crates/core/helloworld.wasm b/crates/core/helloworld.wasm
new file mode 100644
index 0000000..a5c95d0
--- /dev/null
+++ b/crates/core/helloworld.wasm
diff --git a/crates/core/helloworld.wat b/crates/core/helloworld.wat
new file mode 100644
index 0000000..b74c98f
--- /dev/null
+++ b/crates/core/helloworld.wat
@@ -0,0 +1,15 @@
+(module
+    ;; Imports from JavaScript namespace
+    (import  "console"  "log" (func  $log (param  i32  i32))) ;; Import log function
+    (import  "js"  "mem" (memory  1)) ;; Import 1 page of memory (54kb)
+    
+    ;; Data section of our module
+    (data (i32.const 0) "Hello World from WebAssembly!")
+    
+    ;; Function declaration: Exported as helloWorld(), no arguments
+    (func (export  "helloWorld")
+        i32.const 0  ;; pass offset 0 to log
+        i32.const 29  ;; pass length 29 to log (strlen of sample text)
+        call  $log
+        )
+)
\ No newline at end of file
diff --git a/crates/core/src/bin.rs b/crates/core/src/bin.rs
new file mode 100644
index 0000000..c4257e8
--- /dev/null
+++ b/crates/core/src/bin.rs
@@ -0,0 +1,9 @@
+use wasmcore::{self, Module};
+
+pub static WASM: &'static [u8] = include_bytes!("../helloworld.wasm");
+
+fn main() {
+    let module = Module::new(WASM);
+
+    println!("{:#?}", module);
+}
diff --git a/crates/core/src/instructions.rs b/crates/core/src/instructions.rs
new file mode 100644
index 0000000..e3e6a08
--- /dev/null
+++ b/crates/core/src/instructions.rs
@@ -0,0 +1,106 @@
+// https://webassembly.github.io/spec/core/binary/instructions.html
+
+// Controll Instructions
+pub mod control {
+    pub const WASM_UNREACHABLE: u8 = 0x00;
+    pub const WASM_NOP: u8 = 0x01; // do nothing
+
+    // stuctured instructions
+    pub const WASM_BLOCK: u8 = 0x02;
+    pub const WASM_LOOP: u8 = 0x03;
+    pub const WASM_IF: u8 = 0x04;
+
+    pub const WASM_ELSE: u8 = 0x05;
+    pub const WASM_END: u8 = 0x0B;
+    pub const WASM_BR: u8 = 0x0C;
+    pub const WASM_BR_IF: u8 = 0x0D;
+    pub const WASM_BR_TABLE: u8 = 0x0E;
+    pub const WASM_RETURN: u8 = 0x0F;
+    pub const WASM_CALL: u8 = 0x10;
+    pub const WASM_CALL_INDIRECT: u8 = 0x11;
+    pub const WASM_DROP: u8 = 0x1A;
+}
+
+// Reference Instructions
+pub mod reference {
+    pub const WASM_REF_NULL: u8 = 0xD0;
+    pub const WASM_REF_IS_NULL: u8 = 0xD1;
+    pub const WASM_REF_FUNC: u8 = 0xD2;
+}
+
+// Parametric Instructions
+pub mod parametric {
+    pub const WASM_DROP: u8 = 0x1A;
+    pub const WASM_SELECT: u8 = 0x1B;
+    pub const WASM_SELECT_T: u8 = 0x1C;
+}
+
+// Variable Instructions
+pub mod variable {
+    pub const WASM_LOCAL_GET: u8 = 0x20;
+    pub const WASM_LOCAL_SET: u8 = 0x21;
+    pub const WASM_LOCAL_TEE: u8 = 0x22;
+    pub const WASM_GLOBAL_GET: u8 = 0x23;
+    pub const WASM_GLOBAL_SET: u8 = 0x24;
+}
+
+// Table Instructions
+pub mod table {
+    pub const WASM_TABLE_GET: u8 = 0x25;
+    pub const WASM_TABLE_SET: u8 = 0x26;
+    pub const WASM_TABLE_INIT: u8 = 0xFC;
+    pub const WASM_ELEM_DROP: u8 = 0xFC;
+    pub const WASM_TABLE_COPY: u8 = 0xFC;
+    pub const WASM_TABLE_GROW: u8 = 0xFC;
+    pub const WASM_TABLE_SIZE: u8 = 0xFC;
+    pub const WASM_TABLE_FILL: u8 = 0xFC;
+}
+
+// Memory Instructions
+pub mod memory {
+    pub const WASM_I32_LOAD: u8 = 0x28;
+    pub const WASM_I64_LOAD: u8 = 0x29;
+    pub const WASM_F32_LOAD: u8 = 0x2A;
+    pub const WASM_F64_LOAD: u8 = 0x2B;
+    pub const WASM_I32_LOAD8_S: u8 = 0x2C;
+    pub const WASM_I32_LOAD8_U: u8 = 0x2D;
+    pub const WASM_I32_LOAD16_S: u8 = 0x2E;
+    pub const WASM_I32_LOAD16_U: u8 = 0x2F;
+    pub const WASM_I64_LOAD8_S: u8 = 0x30;
+    pub const WASM_I64_LOAD8_U: u8 = 0x31;
+    pub const WASM_I64_LOAD16_S: u8 = 0x32;
+    pub const WASM_I64_LOAD16_U: u8 = 0x33;
+    pub const WASM_I64_LOAD32_S: u8 = 0x34;
+    pub const WASM_I64_LOAD32_U: u8 = 0x35;
+    pub const WASM_I32_STORE: u8 = 0x36;
+    pub const WASM_I64_STORE: u8 = 0x37;
+    pub const WASM_F32_STORE: u8 = 0x38;
+    pub const WASM_F64_STORE: u8 = 0x39;
+    pub const WASM_I32_STORE8: u8 = 0x3A;
+    pub const WASM_I32_STORE16: u8 = 0x3B;
+    pub const WASM_I64_STORE8: u8 = 0x3C;
+    pub const WASM_I64_STORE16: u8 = 0x3D;
+    pub const WASM_I64_STORE32: u8 = 0x3E;
+    pub const WASM_MEMORY_SIZE: u8 = 0x3F;
+    pub const WASM_MEMORY_GROW: u8 = 0x40;
+    pub const WASM_MEMORY_INIT: u8 = 0xFC;
+    pub const WASM_DATA_DROP: u8 = 0xFC;
+    pub const WASM_MEMORY_COPY: u8 = 0xFC;
+    pub const WASM_MEMORY_FILL: u8 = 0xFC;
+}
+
+// Numeric Instructions
+pub mod numeric {
+    // Constants
+    pub const WASM_I32_CONST: u8 = 0x41;
+    pub const WASM_I64_CONST: u8 = 0x42;
+    pub const WASM_F32_CONST: u8 = 0x43;
+    pub const WASM_F64_CONST: u8 = 0x44;
+
+    // Operations
+    pub const START_NUMERIC: u8 = 0x45;
+    pub const END_NUMERIC: u8 = 0xC4;
+    pub const WASM_SATURATING_TRUNC: u8 = 0xFC;
+}
+
+pub const WASM_VEC: u8 = 0xFD;
diff --git a/crates/core/src/lib.rs b/crates/core/src/lib.rs
new file mode 100644
index 0000000..ee8a3be
--- /dev/null
+++ b/crates/core/src/lib.rs
@@ -0,0 +1,178 @@
+#![no_std]
+#![forbid(unsafe_code)]
+
+#[cfg(feature = "std")]
+extern crate std;
+use std::println;
+
+extern crate alloc;
+use alloc::vec::Vec;
+
+use wasmparser::{
+    DataSectionReader, ElementSectionReader, ExportSectionReader, FunctionBody,
+    FunctionSectionReader, GlobalSectionReader, ImportSectionReader, MemorySectionReader, Payload,
+    TableSectionReader, TypeSectionReader, Validator,
+};
+mod instructions;
+
+struct Store {}
+
+pub struct Module<'a> {
+    reader: ModuleReader<'a>,
+}
+
+impl<'a> core::fmt::Debug for Module<'a> {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.debug_struct("Module")
+            .field("version", &self.reader.version)
+            .field("type_section", &self.reader.type_section)
+            .field("function_section", &self.reader.function_section)
+            .field("table_section", &self.reader.table_section)
+            .field("memory_section", &self.reader.memory_section)
+            .field("global_section", &self.reader.global_section)
+            .field("element_section", &self.reader.element_section)
+            .field("data_section", &self.reader.data_section)
+            .field("code_section", &self.reader.code_section)
+            .field("import_section", &self.reader.import_section)
+            .field("export_section", &self.reader.export_section)
+            .finish()
+    }
+}
+
+#[derive(Default)]
+pub struct ModuleReader<'a> {
+    pub version: Option<u16>,
+    pub type_section: Option<TypeSectionReader<'a>>,
+    pub function_section: Option<FunctionSectionReader<'a>>,
+    pub table_section: Option<TableSectionReader<'a>>,
+    pub memory_section: Option<MemorySectionReader<'a>>,
+    pub global_section: Option<GlobalSectionReader<'a>>,
+    pub element_section: Option<ElementSectionReader<'a>>,
+    pub data_section: Option<DataSectionReader<'a>>,
+    pub code_section: Option<CodeSection<'a>>,
+    pub import_section: Option<ImportSectionReader<'a>>,
+    pub export_section: Option<ExportSectionReader<'a>>,
+}
+
+#[derive(Debug)]
+pub struct CodeSection<'a> {
+    pub(crate) functions: Vec<FunctionBody<'a>>,
+}
+
+impl<'a> CodeSection<'a> {
+    fn new() -> Self {
+        Self {
+            functions: Vec::new(),
+        }
+    }
+}
+
+impl<'a> Module<'a> {
+    pub fn new(wasm: &'a [u8]) -> Result<Module, ()> {
+        let mut validator = Validator::new();
+        let mut reader = ModuleReader::new();
+
+        for payload in wasmparser::Parser::new(0).parse_all(wasm) {
+            reader.process_payload(payload.unwrap(), &mut validator)?;
+        }
+
+        Ok(Self { reader })
+    }
+}
+
+impl<'a> ModuleReader<'a> {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn process_payload(
+        &mut self,
+        payload: Payload<'a>,
+        validator: &mut Validator,
+    ) -> Result<bool, ()> {
+        use wasmparser::Payload::*;
+        match payload {
+            Version {
+                num,
+                encoding,
+                range,
+            } => {
+                validator.version(num, encoding, &range).map_err(|_| ())?;
+                self.version = Some(num);
+                match encoding {
+                    wasmparser::Encoding::Module => {}
+                    wasmparser::Encoding::Component => return Err(()),
+                }
+            }
+            TypeSection(reader) => {
+                validator.type_section(&reader).map_err(|_| ())?;
+                self.type_section = Some(reader);
+            }
+            FunctionSection(reader) => {
+                validator.function_section(&reader).map_err(|_| ())?;
+                self.function_section = Some(reader);
+            }
+            TableSection(reader) => {
+                validator.table_section(&reader).map_err(|_| ())?;
+                self.table_section = Some(reader);
+            }
+            MemorySection(reader) => {
+                validator.memory_section(&reader).map_err(|_| ())?;
+                self.memory_section = Some(reader);
+            }
+            GlobalSection(reader) => {
+                validator.global_section(&reader).map_err(|_| ())?;
+                self.global_section = Some(reader);
+            }
+            ElementSection(reader) => {
+                validator.element_section(&reader).map_err(|_| ())?;
+                self.element_section = Some(reader);
+            }
+            DataSection(reader) => {
+                validator.data_section(&reader).map_err(|_| ())?;
+                self.data_section = Some(reader);
+            }
+            CodeSectionStart { count, range, .. } => {
+                validator
+                    .code_section_start(count, &range)
+                    .map_err(|_| ())?;
+
+                self.code_section = Some(CodeSection::new());
+            }
+            CodeSectionEntry(function) => {
+                validator.code_section_entry(&function).map_err(|_| ())?;
+
+                if let Some(code_section) = &mut self.code_section {
+                    code_section.functions.push(function);
+                } else {
+                    return Err(());
+                }
+            }
+            ImportSection(reader) => {
+                validator.import_section(&reader).map_err(|_| ())?;
+                self.import_section = Some(reader);
+            }
+            ExportSection(reader) => {
+                validator.export_section(&reader).map_err(|_| ())?;
+                self.export_section = Some(reader);
+            }
+
+            End(offset) => {
+                validator.end(offset).map_err(|_| ())?;
+                return Ok(true);
+            }
+            x => println!("Unknown payload: {:?}", x),
+        };
+
+        Ok(false)
+    }
+}
+struct Instance {}
+
+pub fn parse(wasm: &[u8]) -> Result<Payload<'_>, ()> {
+    for payload in wasmparser::Parser::new(0).parse_all(wasm) {
+        return Ok(payload.unwrap());
+    }
+
+    return Err(());
+}