Auto merge of #2377 - devnexen:netbsd_arm64, r=JohnTitor

netbsd ucontext type for arm64

Author: bors

libc-test/build.rs

@@ -1032,6 +1032,9 @@ fn test_netbsd(target: &str) {
     });
 
     cfg.skip_type(move |ty| {
+        if ty.starts_with("__c_anonymous_") {
+            return true;
+        }
         match ty {
             // FIXME: sighandler_t is crazy across platforms
             "sighandler_t" => true,

libc-test/semver/netbsd-aarch64.txt

@@ -2,3 +2,6 @@ PT_GETFPREGS
 PT_GETREGS
 PT_SETFPREGS
 PT_SETREGS
+__fregset
+mcontext_t
+ucontext_t

src/unix/bsd/netbsdlike/netbsd/aarch64.rs

@@ -3,8 +3,89 @@ use PT_FIRSTMACH;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type c_char = u8;
+pub type greg_t = u64;
 pub type __cpu_simple_lock_nv_t = ::c_uchar;
 
+s! {
+    pub struct __fregset {
+        #[cfg(libc_union)]
+        pub __qregs: [__c_anonymous__freg; 32],
+        pub __fpcr: u32,
+        pub __fpsr: u32,
+    }
+
+    pub struct mcontext_t {
+        pub __gregs: [::greg_t; 32],
+        pub __fregs: __fregset,
+        __spare: [::greg_t; 8],
+    }
+
+    pub struct ucontext_t {
+        pub uc_flags: ::c_uint,
+        pub uc_link: *mut ucontext_t,
+        pub uc_sigmask: ::sigset_t,
+        pub uc_stack: ::stack_t,
+        pub uc_mcontext: mcontext_t,
+    }
+}
+
+s_no_extra_traits! {
+    #[cfg(libc_union)]
+    #[repr(align(16))]
+    pub union __c_anonymous__freg {
+        pub __b8: [u8; 16],
+        pub __h16: [u16; 8],
+        pub __s32: [u32; 4],
+        pub __d64: [u64; 2],
+        pub __q128: [u128; 1],
+    }
+}
+
+cfg_if! {
+    if #[cfg(feature = "extra_traits")] {
+        #[cfg(libc_union)]
+        impl PartialEq for __c_anonymous__freg {
+            fn eq(&self, other: &__c_anonymous__freg) -> bool {
+                unsafe {
+                self.__b8 == other.__b8
+                    || self.__h16 == other.__h16
+                    || self.__s32 == other.__s32
+                    || self.__d64 == other.__d64
+                    || self.__q128 == other.__q128
+                }
+            }
+        }
+        #[cfg(libc_union)]
+        impl Eq for __c_anonymous__freg {}
+        #[cfg(libc_union)]
+        impl ::fmt::Debug for __c_anonymous__freg {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                unsafe {
+                f.debug_struct("__c_anonymous__freg")
+                    .field("__b8", &self.__b8)
+                    .field("__h16", &self.__h16)
+                    .field("__s32", &self.__s32)
+                    .field("__d64", &self.__d64)
+                    .field("__q128", &self.__q128)
+                    .finish()
+                }
+            }
+        }
+        #[cfg(libc_union)]
+        impl ::hash::Hash for __c_anonymous__freg {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                unsafe {
+                self.__b8.hash(state);
+                self.__h16.hash(state);
+                self.__s32.hash(state);
+                self.__d64.hash(state);
+                self.__q128.hash(state);
+                }
+            }
+        }
+    }
+}
+
 // should be pub(crate), but that requires Rust 1.18.0
 cfg_if! {
     if #[cfg(libc_const_size_of)] {