Starts adding rust in the toolchain

bench/programs_rust/.cargo/config.toml

@@ -0,0 +1,14 @@
+[build]
+target = "riscv64i.json"
+
+[target.riscv64i]
+linker = "riscv64-unknown-elf-ld"
+# linker = "rust-lld"
+
+rustflags = [
+    # "-C", "link-arg=-nostartfiles",
+    "-C", "link-arg=-T../link.ld",
+]
+
+[unstable]
+build-std = ["core", "compiler_builtins"]

bench/programs_rust/.gitignore

@@ -0,0 +1,3 @@
+.helix/
+target/
+Cargo.lock

bench/programs_rust/Cargo.toml

@@ -0,0 +1,13 @@
+[workspace]
+resolver = "3"
+members = ["fpga_lib", "hello_rust"]
+
+[profile.release]
+panic = "abort"
+codegen-units = 1 # better optimizations
+lto = true # better optimizations
+strip = true
+opt-level = "z"
+
+[profile.dev]
+panic = "abort"

bench/programs_rust/fpga_lib/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "fpga_lib"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

bench/programs_rust/fpga_lib/src/lib.rs

@@ -0,0 +1,11 @@
+#![no_std]
+
+#[macro_export]
+macro_rules! panic_handler {
+    () => {
+        #[panic_handler]
+        fn panic(_info: &core::panic::PanicInfo) -> ! {
+            loop {}
+        }
+    };
+}

bench/programs_rust/hello_rust/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "hello_rust"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+fpga_lib = { path = "../fpga_lib" }

bench/programs_rust/hello_rust/src/main.rs

@@ -0,0 +1,18 @@
+#![no_std]
+#![no_main]
+
+use core::arch::asm;
+
+use fpga_lib::panic_handler;
+
+panic_handler! {}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn _start() -> ! {
+    unsafe {
+        asm! {
+            "li x31, 0xdead0"
+        }
+    }
+    loop {}
+}

bench/programs_rust/riscv64i.json

@@ -0,0 +1,21 @@
+{
+    "llvm-target": "riscv64",
+    "llvm-abiname": "lp64",
+    "abi": "lp64",
+    "data-layout": "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128",
+    "target-endian": "little",
+    "target-pointer-width": 64,
+    "arch": "riscv64",
+    "os": "none",
+    "vendor": "unknown",
+    "env": "",
+    "features": "+i",
+    "linker-flavor": "ld.lld",
+    "linker": "riscv64-unknown-elf-ld",
+    "executables": true,
+    "panic-strategy": "abort",
+    "relocation-model": "static",
+    "disable-redzone": true,
+    "emit-debug-gdb-scripts": false,
+    "eh-frame-header": false
+}

bench/programs_rust/rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"