add support for hexagon-unknown-linux-musl

src/libcore/lib.rs

@@ -120,6 +120,7 @@
 #![feature(cmpxchg16b_target_feature)]
 #![feature(rtm_target_feature)]
 #![feature(f16c_target_feature)]
+#![feature(hexagon_target_feature)]
 #![feature(const_slice_len)]
 #![feature(const_str_as_bytes)]
 #![feature(const_str_len)]

src/libpanic_unwind/gcc.rs

@@ -126,6 +126,9 @@ const UNWIND_DATA_REG: (i32, i32) = (6, 7); // R6, R7
 #[cfg(target_arch = "sparc64")]
 const UNWIND_DATA_REG: (i32, i32) = (24, 25); // I0, I1
 
+#[cfg(target_arch = "hexagon")]
+const UNWIND_DATA_REG: (i32, i32) = (0, 1); // R0, R1
+
 // The following code is based on GCC's C and C++ personality routines.  For reference, see:
 // https://github.com/gcc-mirror/gcc/blob/master/libstdc++-v3/libsupc++/eh_personality.cc
 // https://github.com/gcc-mirror/gcc/blob/trunk/libgcc/unwind-c.c

src/librustc_codegen_llvm/llvm_util.rs

@@ -174,7 +174,7 @@ const X86_WHITELIST: &[(&str, Option<Symbol>)] = &[
 
 const HEXAGON_WHITELIST: &[(&str, Option<Symbol>)] = &[
     ("hvx", Some(sym::hexagon_target_feature)),
-    ("hvx-double", Some(sym::hexagon_target_feature)),
+    ("hvx-length128b", Some(sym::hexagon_target_feature)),
 ];
 
 const POWERPC_WHITELIST: &[(&str, Option<Symbol>)] = &[

src/librustc_target/spec/hexagon_unknown_linux_musl.rs

@@ -0,0 +1,36 @@
+use crate::spec::{LinkerFlavor, Target, TargetResult, LinkArgs};
+
+pub fn target() -> TargetResult {
+    let mut base = super::linux_musl_base::opts();
+    base.cpu = "hexagonv60".to_string();
+    base.max_atomic_width = Some(32);
+        // FIXME: HVX length defaults are per-CPU
+    base.features = "-small-data,+hvx-length128b".to_string();
+
+    base.crt_static_default = false;
+    base.atomic_cas = true;
+    base.has_rpath = true;
+    base.linker_is_gnu = false;
+    base.dynamic_linking = true;
+    base.executables = true;
+
+    base.pre_link_args = LinkArgs::new();
+    base.post_link_args = LinkArgs::new();
+
+    Ok(Target {
+        llvm_target: "hexagon-unknown-linux-musl".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: concat!("e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32",
+                     ":32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32",
+                     ":32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048",
+                     ":2048:2048").to_string(),
+        arch: "hexagon".to_string(),
+        target_os: "linux".to_string(),
+        target_env: "musl".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}

src/librustc_target/spec/mod.rs

@@ -368,6 +368,7 @@ supported_targets! {
     ("i586-unknown-linux-musl", i586_unknown_linux_musl),
     ("mips-unknown-linux-musl", mips_unknown_linux_musl),
     ("mipsel-unknown-linux-musl", mipsel_unknown_linux_musl),
+    ("hexagon-unknown-linux-musl", hexagon_unknown_linux_musl),
 
     ("mips-unknown-linux-uclibc", mips_unknown_linux_uclibc),
     ("mipsel-unknown-linux-uclibc", mipsel_unknown_linux_uclibc),

src/libstd/env.rs

@@ -975,6 +975,11 @@ mod arch {
     pub const ARCH: &str = "wasm32";
 }
 
+#[cfg(target_arch = "hexagon")]
+mod arch {
+    pub const ARCH: &'static str = "hexagon";
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/libstd/os/linux/raw.rs

@@ -147,6 +147,62 @@ mod arch {
     }
 }
 
+#[cfg(target_arch = "hexagon")]
+mod arch {
+    use crate::os::raw::{c_long, c_int, c_longlong, culonglong};
+
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = c_longlong;
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = c_long;
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = c_ulonglong;
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = c_uint;
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = c_longlong;
+    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = c_long;
+
+    #[repr(C)]
+    #[derive(Clone)]
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub struct stat {
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_dev: ::dev_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_ino: ::c_ulonglong,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_mode: ::c_uint,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_nlink: ::c_uint,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_uid: ::c_uint,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_gid: ::c_uint,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_rdev: ::c_ulonglong,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub __pad1: ::c_ulong,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_size: ::c_longlong,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_blksize: ::blksize_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub __pad2: ::c_int,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_blocks: ::blkcnt_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_atime: ::time_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_atime_nsec: ::c_long,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_mtime: ::time_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_mtime_nsec: ::c_long,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_ctime: ::time_t,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub st_ctime_nsec: ::c_long,
+        #[stable(feature = "raw_ext", since = "1.1.0")]
+        pub __pad3: [::c_int;2],
+    }
+}
+
 #[cfg(any(target_arch = "mips64",
           target_arch = "s390x",
           target_arch = "sparc64"))]

src/libstd/os/raw/mod.rs

@@ -11,6 +11,7 @@
 #[doc(include = "os/raw/char.md")]
 #[cfg(any(all(target_os = "linux", any(target_arch = "aarch64",
                                        target_arch = "arm",
+                                       target_arch = "hexagon",
                                        target_arch = "powerpc",
                                        target_arch = "powerpc64",
                                        target_arch = "s390x")),
@@ -34,6 +35,7 @@
 #[doc(include = "os/raw/char.md")]
 #[cfg(not(any(all(target_os = "linux", any(target_arch = "aarch64",
                                            target_arch = "arm",
+                                           target_arch = "hexagon",
                                            target_arch = "powerpc",
                                            target_arch = "powerpc64",
                                            target_arch = "s390x")),

src/libstd/sys_common/alloc.rs

@@ -12,7 +12,8 @@ use crate::ptr;
               target_arch = "powerpc",
               target_arch = "powerpc64",
               target_arch = "asmjs",
-              target_arch = "wasm32")))]
+              target_arch = "wasm32",
+              target_arch = "hexagon")))]
 pub const MIN_ALIGN: usize = 8;
 #[cfg(all(any(target_arch = "x86_64",
               target_arch = "aarch64",

src/libunwind/libunwind.rs

@@ -56,6 +56,9 @@ pub const unwinder_private_data_size: usize = 2;
 #[cfg(target_os = "emscripten")]
 pub const unwinder_private_data_size: usize = 20;
 
+#[cfg(all(target_arch = "hexagon", target_os = "linux"))]
+pub const unwinder_private_data_size: usize = 35;
+
 #[repr(C)]
 pub struct _Unwind_Exception {
     pub exception_class: _Unwind_Exception_Class,