targets: aarch64: Add bare-metal aarch64 target

A generic AArch64 target that can be used for writing bare-metal code for 64-bit ARM architectures.
rust-lang · Aug 9, 2018 · 898950caf1a7bc9b6c41e74bbfac9591724f307c · 898950c
1 parent b73535f
commit 898950caf1a7bc9b6c41e74bbfac9591724f307c
Unified Split

Showing with 48 additions and 0 deletions.

+46 −0 src/librustc_target/spec/aarch64_unknown_none.rs

+2 −0 src/librustc_target/spec/mod.rs
diff --git a/src/librustc_target/spec/aarch64_unknown_none.rs b/src/librustc_target/spec/aarch64_unknown_none.rs
@@ -0,0 +1,46 @@
+  
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+  
+// file at the top-level directory of this distribution and at
+  
+// http://rust-lang.org/COPYRIGHT.
+  
+//
+  
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+  
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+  
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+  
+// option. This file may not be copied, modified, or distributed
+  
+// except according to those terms.
+  
+
+  
+// Generic AArch64 target for bare-metal code
+  
+//
+  
+// Can be used in conjunction with the `target-feature` and
+  
+// `target-cpu` compiler flags to opt-in more hardware-specific
+  
+// features.
+  
+//
+  
+// For example, `-C target-cpu=cortex-a53`.
+  
+
+  
+use super::{LldFlavor, LinkerFlavor, Target, TargetOptions, PanicStrategy};
+  
+
+  
+pub fn target() -> Result<Target, String> {
+  
+    let opts = TargetOptions {
+  
+        linker: Some("rust-lld".to_owned()),
+  
+        executables: true,
+  
+        relocation_model: "static".to_string(),
+  
+        disable_redzone: true,
+  
+        linker_is_gnu: true,
+  
+        max_atomic_width: Some(128),
+  
+        panic_strategy: PanicStrategy::Abort,
+  
+        abi_blacklist: super::arm_base::abi_blacklist(),
+  
+        .. Default::default()
+  
+    };
+  
+    Ok(Target {
+  
+        llvm_target: "aarch64-unknown-none".to_string(),
+  
+        target_endian: "little".to_string(),
+  
+        target_pointer_width: "64".to_string(),
+  
+        target_c_int_width: "32".to_string(),
+  
+        target_os: "none".to_string(),
+  
+        target_env: "".to_string(),
+  
+        target_vendor: "".to_string(),
+  
+        data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
+  
+        arch: "aarch64".to_string(),
+  
+        linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
+  
+        options: opts,
+  
+    })
+  
+}
diff --git a/src/librustc_target/spec/mod.rs b/src/librustc_target/spec/mod.rs
@@ -379,6 +379,8 @@ supported_targets! {
    ("x86_64-unknown-hermit", x86_64_unknown_hermit),
    ("riscv32imac-unknown-none-elf", riscv32imac_unknown_none_elf),
+  
+
+  
+    ("aarch64-unknown-none", aarch64_unknown_none),
 }
 /// Everything `rustc` knows about how to compile for a specific target.