Auto merge of #61946 - BaoshanPang:vxworks, r=alexcrichton

port rust for vxWorks

The supporting for vxWorks has been enabled in this branch. Although there are still a lots of work to do, I would like to upstream the code and fix the problems later.

Please let me know if there is anything I have to do before upstream the code.

r? @alexcrichton

Thanks,
Baoshan

src/bootstrap/cc_detect.rs

@@ -45,6 +45,8 @@ fn cc2ar(cc: &Path, target: &str) -> Option<PathBuf> {
         Some(PathBuf::from("ar"))
     } else if target.contains("openbsd") {
         Some(PathBuf::from("ar"))
+    } else if target.contains("vxworks") {
+        Some(PathBuf::from("vx-ar"))
     } else {
         let parent = cc.parent().unwrap();
         let file = cc.file_name().unwrap().to_str().unwrap();

src/librustc_target/spec/aarch64_wrs_vxworks.rs

@@ -0,0 +1,24 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.max_atomic_width = Some(128);
+
+    Ok(Target {
+        llvm_target: "aarch64-unknown-linux-gnu".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        target_env: "gnu".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(),
+        target_os: "vxworks".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\u{1}_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/arm_wrs_vxworks.rs

@@ -0,0 +1,32 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+// This target is for glibc Linux on ARMv7 without NEON or
+// thumb-mode. See the thumbv7neon variant for enabling both.
+
+pub fn target() -> TargetResult {
+    let base = super::vxworks_base::opts();
+    Ok(Target {
+        llvm_target: "armv7-unknown-linux-gnueabihf".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_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: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+
+        options: TargetOptions {
+            // Info about features at https://wiki.debian.org/ArmHardFloatPort
+            features: "+v7,+vfp3,+d16,+thumb2,-neon".to_string(),
+            cpu: "generic".to_string(),
+            max_atomic_width: Some(64),
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\u{1}__gnu_mcount_nc".to_string(),
+//          tls_model: "local-exec".to_string(),
+            position_independent_executables: false,
+            .. base
+        }
+    })
+}

src/librustc_target/spec/arm_wrs_vxworks_sf.rs

@@ -0,0 +1,25 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.max_atomic_width = Some(64);
+    Ok(Target {
+        llvm_target: "arm-unknown-linux-gnueabi".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_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: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+
+        options: TargetOptions {
+            features: "+strict-align,+v6".to_string(),
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\u{1}__gnu_mcount_nc".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/armv7_wrs_vxworks.rs

@@ -0,0 +1,32 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+// This target is for glibc Linux on ARMv7 without NEON or
+// thumb-mode. See the thumbv7neon variant for enabling both.
+
+pub fn target() -> TargetResult {
+    let base = super::vxworks_base::opts();
+    Ok(Target {
+        llvm_target: "armv7-unknown-linux-gnueabihf".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_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: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+
+        options: TargetOptions {
+            // Info about features at https://wiki.debian.org/ArmHardFloatPort
+            features: "+v7,+vfp3,+d16,+thumb2,-neon".to_string(),
+            cpu: "generic".to_string(),
+            max_atomic_width: Some(64),
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            target_mcount: "\u{1}__gnu_mcount_nc".to_string(),
+//          tls_model: "local-exec".to_string(),
+            position_independent_executables: false,
+            .. base
+        }
+    })
+}

src/librustc_target/spec/i586_wrs_vxworks.rs

@@ -0,0 +1,8 @@
+use crate::spec::TargetResult;
+
+pub fn target() -> TargetResult {
+    let mut base = super::i686_wrs_vxworks::target()?;
+    base.options.cpu = "pentium".to_string();
+    base.llvm_target = "i586-unknown-linux-gnu".to_string();
+    Ok(base)
+}

src/librustc_target/spec/i686_wrs_vxworks.rs

@@ -0,0 +1,23 @@
+use crate::spec::{LinkerFlavor, Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.cpu = "pentium4".to_string();
+    base.max_atomic_width = Some(64);
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m32".to_string());
+    base.stack_probes = true;
+
+    Ok(Target {
+        llvm_target: "i686-unknown-linux-gnu".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        arch: "x86".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}

src/librustc_target/spec/i686_wrs_vxworks_gnu.rs

@@ -0,0 +1,23 @@
+use crate::spec::{LinkerFlavor, Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.cpu = "pentium4".to_string();
+    base.max_atomic_width = Some(64);
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m32".to_string());
+    base.stack_probes = true;
+
+    Ok(Target {
+        llvm_target: "i686-unknown-linux-gnu".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        arch: "x86".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}

src/librustc_target/spec/mod.rs

@@ -66,6 +66,7 @@ mod fuchsia_base;
 mod redox_base;
 mod riscv_base;
 mod wasm32_base;
+mod vxworks_base;
 
 #[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd, Hash,
          RustcEncodable, RustcDecodable)]
@@ -361,7 +362,6 @@ supported_targets! {
     ("thumbv7neon-unknown-linux-gnueabihf", thumbv7neon_unknown_linux_gnueabihf),
     ("armv7-unknown-linux-musleabihf", armv7_unknown_linux_musleabihf),
     ("aarch64-unknown-linux-gnu", aarch64_unknown_linux_gnu),
-
     ("aarch64-unknown-linux-musl", aarch64_unknown_linux_musl),
     ("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
     ("i686-unknown-linux-musl", i686_unknown_linux_musl),
@@ -476,6 +476,15 @@ supported_targets! {
     ("x86_64-unknown-uefi", x86_64_unknown_uefi),
 
     ("nvptx64-nvidia-cuda", nvptx64_nvidia_cuda),
+
+    ("x86_64-wrs-vxworks", x86_64_wrs_vxworks),
+    ("i686-wrs-vxworks", i686_wrs_vxworks),
+    ("i586-wrs-vxworks", i586_wrs_vxworks),
+    ("armv7-wrs-vxworks", armv7_wrs_vxworks),
+    ("aarch64-wrs-vxworks", aarch64_wrs_vxworks),
+    ("powerpc-wrs-vxworks", powerpc_wrs_vxworks),
+    ("powerpc-wrs-vxworks-spe", powerpc_wrs_vxworks_spe),
+    ("powerpc64-wrs-vxworks", powerpc64_wrs_vxworks),
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.

src/librustc_target/spec/powerpc64_wrs_vxworks.rs

@@ -0,0 +1,25 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.cpu = "ppc64".to_string();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m64".to_string());
+    base.max_atomic_width = Some(64);
+
+    Ok(Target {
+        llvm_target: "powerpc64-unknown-linux-gnu".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64".to_string(),
+        arch: "powerpc64".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/powerpc64_wrs_vxworks_gnusf.rs

@@ -0,0 +1,26 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.cpu = "ppc64".to_string();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m64".to_string());
+    base.max_atomic_width = Some(64);
+
+    Ok(Target {
+        llvm_target: "powerpc64-unknown-linux-gnu".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-i64:64-n32:64".to_string(),
+        arch: "powerpc64".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            features: "-hard-float".to_string(),
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/powerpc_wrs_vxworks.rs

@@ -0,0 +1,26 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m32".to_string());
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("--secure-plt".to_string());
+    base.max_atomic_width = Some(32);
+
+    Ok(Target {
+        llvm_target: "powerpc-unknown-linux-gnu".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-p:32:32-i64:64-n32".to_string(),
+        arch: "powerpc".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "wrs".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            features: "+secure-plt".to_string(),
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/powerpc_wrs_vxworks_gnusf.rs

@@ -0,0 +1,26 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m32".to_string());
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("--secure-plt".to_string());
+    base.max_atomic_width = Some(32);
+
+    Ok(Target {
+        llvm_target: "powerpc-unknown-linux-gnu".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-p:32:32-i64:64-n32".to_string(),
+        arch: "powerpc".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "wrs".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            features: "+secure-plt,-hard-float".to_string(),
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/powerpc_wrs_vxworks_gnuspesf.rs

@@ -0,0 +1,27 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-mspe".to_string());
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("--secure-plt".to_string());
+    base.max_atomic_width = Some(32);
+
+    Ok(Target {
+        llvm_target: "powerpc-unknown-linux-gnuspe".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-p:32:32-i64:64-n32".to_string(),
+        arch: "powerpc".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "wrs".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            // feature msync would disable instruction 'fsync' which is not supported by fsl_p1p2
+            features: "+secure-plt,+msync,-hard-float".to_string(),
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}

src/librustc_target/spec/powerpc_wrs_vxworks_spe.rs

@@ -0,0 +1,27 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::vxworks_base::opts();
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-mspe".to_string());
+    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("--secure-plt".to_string());
+    base.max_atomic_width = Some(32);
+
+    Ok(Target {
+        llvm_target: "powerpc-unknown-linux-gnuspe".to_string(),
+        target_endian: "big".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "E-m:e-p:32:32-i64:64-n32".to_string(),
+        arch: "powerpc".to_string(),
+        target_os: "vxworks".to_string(),
+        target_env: "gnu".to_string(),
+        target_vendor: "wrs".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            // feature msync would disable instruction 'fsync' which is not supported by fsl_p1p2
+            features: "+secure-plt,+msync".to_string(),
+            target_mcount: "_mcount".to_string(),
+            .. base
+        },
+    })
+}