Initial commit

.gitignore

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+/target
+Cargo.lock

Cargo.toml

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+[package]
+name = "align"
+version = "0.1.0"
+authors = ["Dave Hylands <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[lib]
+name = "align"
+path = "src/lib.rs"
+crate-type = ["staticlib"]
+

README.md

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+Simple project for determining the alignment for various architectures.
+
+To use, install an appropriate target using `rustup target add TARGETNAME`
+
+You can then build using `cargo build --target=TARGETNAME` and disassemble the lib using:
+`llvm-objdump -d target/TARGETNAME/debug/libalign.a`
+
+I tested the following:
+
+* aarch64-apple-ios
+* armv5te-unknown-linux-gnueabi
+* armv7-linux-androideabi
+* i686-linux-android
+* x86_64-apple-darwin
+* x86_64-apple-ios
+
+and they all produced 1, 2, 4, and 8 for the alignment of u8, u16, u32, and u64
+with the exception that i686-linux-android produced an alignment of 4 for u64.
+

src/lib.rs

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+#[inline(never)]
+#[no_mangle]
+pub unsafe extern "C" fn align_of_u8() -> usize {
+    std::mem::align_of::<u8>()
+}
+
+#[inline(never)]
+#[no_mangle]
+pub unsafe extern "C" fn align_of_u16() -> usize {
+    std::mem::align_of::<u16>()
+}
+
+#[inline(never)]
+#[no_mangle]
+pub unsafe extern "C" fn align_of_u32() -> usize {
+    std::mem::align_of::<u32>()
+}
+
+#[inline(never)]
+#[no_mangle]
+pub unsafe extern "C" fn align_of_u64() -> usize {
+    std::mem::align_of::<u64>()
+}
+