add thumb* targets to the compiler

Author: Jorge Aparicio

src/librustc_back/target/mod.rs

@@ -63,11 +63,12 @@ mod netbsd_base;
 mod solaris_base;
 mod windows_base;
 mod windows_msvc_base;
+mod thumb_base;
 
 pub type TargetResult = Result<Target, String>;
 
 macro_rules! supported_targets {
-    ( $(($triple:expr, $module:ident)),+ ) => (
+    ( $(($triple:expr, $module:ident)),+, ) => (
         $(mod $module;)*
 
         /// List of supported targets
@@ -184,7 +185,12 @@ supported_targets! {
     ("i586-pc-windows-msvc", i586_pc_windows_msvc),
 
     ("le32-unknown-nacl", le32_unknown_nacl),
-    ("asmjs-unknown-emscripten", asmjs_unknown_emscripten)
+    ("asmjs-unknown-emscripten", asmjs_unknown_emscripten),
+
+    ("thumbv6m-none-eabi", thumbv6m_none_eabi),
+    ("thumbv7m-none-eabi", thumbv7m_none_eabi),
+    ("thumbv7em-none-eabi", thumbv7em_none_eabi),
+    ("thumbv7em-none-eabihf", thumbv7em_none_eabihf),
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.

src/librustc_back/target/thumb_base.rs

@@ -0,0 +1,21 @@
+// Copyright 2014 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.
+
+use target::TargetOptions;
+use std::default::Default;
+
+pub fn opts() -> TargetOptions {
+    TargetOptions {
+        executables: true,
+        linker: "arm-none-eabi-gcc".to_string(),
+        max_atomic_width: 32,
+        .. Default::default()
+    }
+}

src/librustc_back/target/thumbv6m_none_eabi.rs

@@ -0,0 +1,34 @@
+// Copyright 2016 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.
+
+use target::{Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::thumb_base::opts();
+    // There are no atomic instructions in the ARMv6-M architecture
+    base.max_atomic_width = 0;
+    Ok(Target {
+        llvm_target: "thumbv6m-none-eabi".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "none".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "".to_string(),
+
+        options: TargetOptions {
+            // NOTE prevents mis-optimizations of `ptr::copy_nonoverlapping` when unaligned loads
+            // are involved
+            features: "+strict-align".to_string(),
+            .. base
+        }
+    })
+}

src/librustc_back/target/thumbv7em_none_eabi.rs

@@ -0,0 +1,27 @@
+// Copyright 2016 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.
+
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let base = super::thumb_base::opts();
+    Ok(Target {
+        llvm_target: "thumbv7em-none-eabi".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "none".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "".to_string(),
+
+        options: base,
+    })
+}

src/librustc_back/target/thumbv7em_none_eabihf.rs

@@ -0,0 +1,31 @@
+// Copyright 2016 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.
+
+use target::{Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let base = super::thumb_base::opts();
+    Ok(Target {
+        llvm_target: "thumbv7em-none-eabihf".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "none".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "".to_string(),
+
+        options: TargetOptions {
+            // NOTE lowest common denominator between the Cortex-M4 (vfp4) and the Cortex-M7 (vfp5)
+            features: "+vfp4".to_string(),
+            .. base
+        }
+    })
+}

src/librustc_back/target/thumbv7m_none_eabi.rs

@@ -0,0 +1,27 @@
+// Copyright 2016 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.
+
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let base = super::thumb_base::opts();
+    Ok(Target {
+        llvm_target: "thumbv7m-none-eabi".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "none".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "".to_string(),
+
+        options: base,
+    })
+}